JP5961541B2 - Outer ring, roller bearing, and rotating shaft support structure - Google Patents

Description

  The present invention relates to an outer ring, a roller bearing, and a rotating shaft support structure, and in particular, an outer ring formed by incorporating a plurality of divided outer ring members from the outer diameter side of the rotating shaft, a roller bearing including such an outer ring, And a rotating shaft support structure.

  As a bearing that supports a camshaft or a crankshaft, a shell-type needle bearing that is capable of receiving a heavy load despite having a small bearing projection area and that has high rigidity may be applied. Here, as the outer ring provided in the shell-type needle bearing, there is one to which a substantially semi-cylindrical split outer ring member obtained by dividing an annular outer ring into two is applied. Such a shell-type needle bearing incorporates a pair of split outer rings from the outer diameter side of the shaft, and abuts the abutting portions located at the circumferential ends of the respective split outer ring members to form one outer ring. be able to. The shell-type needle bearing having such a configuration can improve the assemblability of the outer ring with respect to the shaft.

  US Pat. No. 1,192,488 (Patent Document 1), Japanese Patent Application Laid-Open No. 2005-90696 (Patent Document 2), Japanese Patent Application Laid-Open No. 2005-337352 (Patent Document 3), and Japanese Patent Application Laid-Open No. 2005-337352 are disclosed. It is disclosed in 2009-138793 (Patent Document 4) and JP-A-2009-281397 (Patent Document 5).

  According to Patent Document 1, a first split outer ring member having a V-shaped butted portion in which the butted portions at both ends in the circumferential direction protrude in the circumferential direction, and a V-shaped shape in which the butted portions at both ends in the circumferential direction are recessed in the circumferential direction. One annular outer ring is formed by combining the second split outer ring member having the abutting portion. According to Patent Document 2, the race plate (the split outer ring member) has a wedge shape at one end in the circumferential direction that becomes one abutting portion, and has a valley shape at the other end in the circumferential direction that becomes the other abutting portion. . And in a pair of lace plates, a wedge-shaped butted portion of one lace plate and a valley-shaped butted portion of the other lace plate, and a valley-shaped butted portion of one lace plate and a valley-shaped butted portion of the other lace plate are combined. Thus, a cylindrical outer race is formed. According to Patent Document 3, the shape of one end in the circumferential direction of the split outer ring member is an uneven shape having an inclined portion inclined with respect to a line along the axial direction and an inclined portion inclined in the opposite direction with respect to the inclined portion. In the pair of split outer ring members, the concave and convex shapes are abutted to form an annular outer ring. Also in Patent Document 4, the pair of split outer ring members have the same shape. Note that the outer diameter surface of the split outer ring member is an arc surface having no irregularities. According to Patent Document 5, a protrusion is formed at one end in the circumferential direction of the first split outer ring member, and a notch is formed at one end in the circumferential direction of the second split outer ring member. It is supposed to be snap-engaged. The other ends in the circumferential direction of the first and second split outer ring members are connected in advance.

US Pat. No. 1,192,488 JP-A-2005-90696 JP 2005-337352 A JP 2009-138793 A JP 2009-28197A

  For the outer ring formed by incorporating a plurality of members constituting the outer ring, such as a split outer ring member, from the outer diameter side of the rotating shaft, the circumferential ends of the pair of split outer rings are brought into contact with each other and combined. Here, each of the incorporated split outer rings is basically an independent member, and is not an integral member connected in an annular shape. Therefore, it is necessary to appropriately regulate movement in the circumferential direction and the axial direction in the housing. is there. That is, in the split outer ring incorporated in the housing, it is required to reliably position each of the split outer rings when incorporated in the housing.

  Here, according to patent document 2, it is the structure by which the engaging claw is provided in the both ends of the axial direction. The two split claws are reliably positioned by the two engaging claws provided at both ends in the axial direction. However, according to such a configuration, it is necessary to provide the housing with two engagement claws and two engagement holes for receiving the two engagement claws, which is accompanied by a complicated configuration and an increase in processing man-hours. There is concern about the deterioration of sex. On the other hand, according to Patent Literature 1 and Patent Literature 3 to Patent Literature 5, the portion that engages with the housing is not provided in the split outer ring itself. In such a configuration, in the split outer ring, each of which is an independent member, the positioning of each member when assembled in the housing may become unstable. That is, there is a possibility that the outer ring rotates in the circumferential direction when incorporated in the housing.

  An object of the present invention is to provide an outer ring that has good productivity and can appropriately position a divided outer ring member when incorporated in a housing.

  Another object of the present invention is to provide a roller bearing with good productivity and capable of appropriately positioning a split outer ring member when incorporated in a housing.

  Still another object of the present invention is to provide a rotating shaft support structure that has good productivity and can appropriately position a split outer ring member when incorporated in a housing.

  The outer ring according to the present invention is provided in a roller bearing and is formed by incorporating a plurality of divided outer ring members from the outer diameter side. Of the split outer ring members, the outer shape of the end portion in the circumferential direction that abuts the split outer ring member adjacent in the circumferential direction is the rotation axis of the roller bearing from the one side width surface toward the other side width surface when viewed from the radial direction. And a second line extending obliquely with respect to the rotation axis of the roller bearing from the other side width surface toward the one side width surface, and adjacent to each other in the circumferential direction. It is a shape which meshes with the edge part of the circumferential direction of an outer ring member. The split outer ring member is provided between the end of the first line on the other side of the first surface and the end of the second line on the first side of the second surface, extends to the outer diameter side, and is a roller bearing. One engaging portion that engages with the housing when incorporated in the housing.

  According to such a configuration, the outer shape of the end portion in the circumferential direction that collides with the divided outer ring member adjacent in the circumferential direction among the divided outer ring members, when viewed from the radial direction, from the one side width surface to the other side width surface. A first line extending obliquely with respect to the rotation axis of the roller bearing and a second line extending obliquely with respect to the rotation axis of the roller bearing from the other side width surface toward the one side width surface. In addition, since it has a shape that meshes with the circumferential end of the divided outer ring member adjacent in the circumferential direction, it is properly meshed with the first and second lines extending in an inclined manner, and the axial direction between the adjacent divided outer ring members Movement is restricted. In this case, the first line and the second line are configured to extend so as to be inclined with respect to the rotation axis of the roller bearing, and therefore, in the abutting region of the adjacent split outer ring member, Can reduce the risk of line contact, and can smoothly roll the rollers. In addition, since one of the engaging portions provided on the split outer ring member can be engaged with the housing to prevent rotation of the split outer ring member, in the plurality of split outer ring members incorporated, the circumference of each split outer ring member can be reduced. Directional movement can be restricted. In this case, since only one engaging portion needs to be provided at the end portion on one side, an inexpensive configuration can be obtained. Therefore, the productivity is good, and the divided outer ring member can be appropriately positioned when incorporated in the housing.

  Further, when viewed from the radial direction, the outer shape of the end on one side in the circumferential direction that abuts with the divided outer ring member adjacent in the circumferential direction is a shape in which the center in the axial direction protrudes in the circumferential direction, and the other side The end may be configured such that the center in the axial direction is recessed in the circumferential direction.

  Moreover, you may comprise so that the 1st line and the 2nd line may incline in the same direction.

  Moreover, you may comprise an engaging part so that the protrusion part which protrudes in the circumferential direction of a division | segmentation outer ring member may be bent and formed in the outer diameter side. By doing so, the joint portion with the rolling surface of the roller located on the inner diameter side has a smooth curved surface shape. If it does so, rolling of a roller can be made smooth and a vibration and noise can be reduced.

  Moreover, you may comprise so that the receiving recessed part which receives an engaging part may be provided in the part which opposes the engaging part of an adjacent division | segmentation outer ring member among division | segmentation outer ring members. By doing so, interference between the engaging portions can be prevented between the adjacent divided outer ring members.

  Moreover, you may comprise so that an engaging part may be provided in the center of an axial direction.

  In another aspect of the present invention, the roller bearing includes any of the outer rings described above, a plurality of rollers, and a cage that holds the plurality of rollers and can be assembled from the radial direction.

  In still another aspect of the present invention, a rotating shaft support structure includes the above-described roller bearing, a rotating shaft that is rotatably supported by the roller bearing, a housing upper portion, and a housing lower portion. And a housing in which a roller bearing can be incorporated, and at least one of the housing upper part and the housing lower part is provided with an engagement hole to be engaged with the engagement part.

  Further, the engagement hole may be configured to include an oil passage port through which lubricating oil is passed.

  Further, the upper part of the housing and the lower part of the housing may be fastened with bolts, and the engaging part may be provided with a through hole through which the shaft part of the bolt can be inserted.

  According to such a configuration, the outer shape of the end portion in the circumferential direction that collides with the divided outer ring member adjacent in the circumferential direction among the divided outer ring members, when viewed from the radial direction, from the one side width surface to the other side width surface. A first line extending obliquely with respect to the rotation axis of the roller bearing and a second line extending obliquely with respect to the rotation axis of the roller bearing from the other side width surface toward the one side width surface. In addition, since it has a shape that meshes with the circumferential end of the divided outer ring member adjacent in the circumferential direction, it is properly meshed with the first and second lines extending in an inclined manner, and the axial direction between the adjacent divided outer ring members Movement is restricted. In this case, the first line and the second line are configured to extend so as to be inclined with respect to the rotation axis of the roller bearing, and therefore, in the abutting region of the adjacent split outer ring member, Can reduce the risk of line contact, and can smoothly roll the rollers. In addition, since one of the engaging portions provided on the split outer ring member can be engaged with the housing to prevent rotation of the split outer ring member, in the plurality of split outer ring members incorporated, the circumference of each split outer ring member can be reduced. Directional movement can be restricted. In this case, since only one engaging portion needs to be provided at the end portion on one side, an inexpensive configuration can be obtained. Therefore, the productivity is good, and the divided outer ring member can be appropriately positioned when incorporated in the housing.

It is a perspective view which shows the outer ring | wheel which concerns on one Embodiment of this invention. It is the figure which expanded the edge part of the one side of the circumferential direction of a 1st division | segmentation outer ring member, and was seen from the outer-diameter side. It is the figure which expanded the edge part of the other side of the circumferential direction of a 1st division | segmentation outer ring member, and was seen from the outer diameter side. It is the cross section which cut | disconnected the axial center area | region in the plane perpendicular | vertical to a rotating shaft line among the edge parts of the circumferential direction of a 1st division | segmentation outer ring member. It is the figure which looked at the 1st division | segmentation outer ring member which has the protrusion part which protrudes in the circumferential direction from the outer diameter side. The state where the edge part of the one side of the circumferential direction of the 1st division | segmentation outer ring member and the edge part of the other side of the circumferential direction of the 2nd division | segmentation outer ring member are faced | matched is shown. It is sectional drawing which shows the structure of the needle roller bearing containing the outer ring which concerns on one Embodiment of this invention, and a rotating shaft support structure provided with this needle roller bearing, and shows the state which decomposed | disassembled each structural member. It is sectional drawing which shows the structure of the needle roller bearing containing the outer ring which concerns on one Embodiment of this invention, and a rotating shaft support structure provided with this needle roller bearing, and shows the state which combined each structural member. It is sectional drawing which shows the rotating shaft support structure which concerns on other embodiment of this invention, and shows the state which decomposed | disassembled each structural member. It is sectional drawing which shows the rotating shaft support structure which concerns on other embodiment of this invention, and shows the state which combined each structural member. An opening hole is an enlarged view seen from a direction indicated by an arrow D ₁ of the in FIGS. It is a figure which shows a part of 1st division | segmentation outer ring member which comprises the outer ring | wheel included in the needle roller bearing with which the rotating shaft support structure which concerns on further another embodiment of this invention is equipped. It is sectional drawing which shows the rotating shaft support structure which concerns on other embodiment of this invention, and shows the state which combined each structural member. It is a figure which shows the integrated holder | retainer by which a part of circumferential direction was cut | disconnected, and the case where it was made cylindrical shape by making edge parts oppose is shown. It is a figure which shows the integrated holder | retainer by which a part of circumferential direction was cut | disconnected, and the state which expanded the space | interval of edge parts is shown. It is sectional drawing which shows a rotating shaft support structure provided with the needle roller bearing containing the holder | retainer shown in FIG. 14 and FIG. It is a perspective view which shows the outer ring | wheel which concerns on other embodiment of this invention. It is the figure which expanded the edge part of the one side of the circumferential direction of the 1st division | segmentation outer ring member shown in FIG. 17, and was seen from the outer-diameter side. It is the figure which expanded the edge part of the other side of the circumferential direction of the 1st division | segmentation outer ring member shown in FIG. 17, and was seen from the outer-diameter side. It is the cross section which cut | disconnected the axial center area | region in the plane perpendicular | vertical to a rotating shaft line among the edge parts of the circumferential direction of a 1st division | segmentation outer ring member. The state where the edge part of the one side of the circumferential direction of the 1st division | segmentation outer ring member and the edge part of the other side of the circumferential direction of the 2nd division | segmentation outer ring member are faced | matched is shown. It is sectional drawing which shows the structure of the needle roller bearing containing the outer ring | wheel which concerns on other embodiment, and a rotating shaft support structure provided with this needle roller bearing, and shows the state which decomposed | disassembled each structural member. Furthermore, it is sectional drawing which shows the structure of the needle roller bearing containing the outer ring which concerns on other embodiment, and a rotating shaft support structure provided with this needle roller bearing, and shows the state which combined each structural member. It is sectional drawing which shows the rotating shaft support structure which concerns on other embodiment of this invention, and shows the state which decomposed | disassembled each structural member It is sectional drawing which shows the rotating shaft support structure which concerns on other embodiment of this invention, and shows the state which combined each structural member. The rotary shaft supporting structure as shown in FIG. 25 is an enlarged view seen from the direction of an aperture hole with an arrow D ₁ of the in FIGS. 24 and 25. It is sectional drawing which shows the rotating shaft support structure which concerns on other embodiment of this invention, and shows the state which combined each structural member.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an outer ring according to an embodiment of the present invention. With reference to FIG. 1, the outer ring | wheel 11a which concerns on one Embodiment of this invention is a structure formed by incorporating a some division | segmentation outer ring member from an outer diameter side. Specifically, the outer ring 11a is configured by combining two, that is, a pair of first divided outer ring member 12a and second divided outer ring member 12b. In FIG. 1, from the viewpoint of easy understanding, the first divided outer ring member 12a and the second divided outer ring member 12b are illustrated with an interval therebetween, but are included in a needle roller bearing described later. When used, the first divided outer ring member 12a and the second divided outer ring member 12b are combined so that the ends in the circumferential direction are continuous. In the drawings shown below, a rotation axis of a later-described needle roller bearing including the outer ring 11 a is indicated by a one-dot chain line 13.

  Next, the structure of the 1st division | segmentation outer ring member 12a which forms the outer ring | wheel 11a is demonstrated. 2 and 3 are enlarged views of the end portions 14a and 15a in the circumferential direction of the first divided outer ring member 12a as seen from the outer diameter side. FIG. 2 shows an end portion 14a on one side in the circumferential direction of the first divided outer ring member 12a, and corresponds to a portion shown in a region II in FIG. FIG. 3 shows an end 15a on the other side in the circumferential direction of the first divided outer ring member 12a, and corresponds to a portion shown in a region III in FIG. 2 and 3, the one end 14b of the second divided outer ring member 12b and the other end 15b of the second divided outer ring member 12b are also shown.

  With reference to FIGS. 1-3, the external shape of the 1st division | segmentation outer ring member 12a is a substantially semicylindrical shape. That is, the 1st division | segmentation outer ring member 12a is the shape which cut | disconnected the cylindrical member in two places of the circumferential direction which opposes 180 degrees. The inner diameter surface 16a of the first split outer ring member 12a serves as a raceway surface on which needle rollers to be described later roll. The 1st division | segmentation outer ring member 12a is a structure which does not have what is called a wrinkle, and has predetermined | prescribed thickness. The first split outer ring member 12a is provided with a through hole 18a that penetrates straight from the inner diameter surface 16a toward the outer diameter surface 17a in the radial direction. The through-hole 18a, when viewed from the axial direction, is about 90 ° around the rotation axis 13 from the center in the circumferential direction of the first split outer ring member 12a, that is, from the respective circumferential ends 14a and 15a. In the position. The through hole 18a is provided on the inner diameter surface 16a side so that the opening is located on the raceway surface on which the needle rollers roll. Specifically, the through hole 18a is provided so as to be positioned at the center in the axial direction of the inner diameter surface 16a. The through hole 18a is used for passing lubricating oil in the radial direction. Similarly, in the second divided outer ring member 12b, the inner diameter surface 16b is a raceway surface. Further, a through hole 18b for lubricating oil passing through the inner surface 16b straightly in the radial direction from the inner surface 16b to the outer surface 17b is provided.

Next, the structure of the edge part 14a of the one side of the circumferential direction of the 1st division | segmentation outer ring member 12a is demonstrated. One end 14a in the circumferential direction of the first divided outer ring member 12a abuts with an end 15b of the second divided outer ring member 12b adjacent in the circumferential direction. The outer shape of the end portion 14a is rotated from the one side width surface 21a located on one side in the axial direction toward the other side width surface 22a located on the other side in the axial direction when viewed from the radial direction, here the outer diameter side. It has the 1st line 23a extended incline with respect to the axis line 13, and the 2nd line 24a extended incline with respect to the rotating shaft line 13 toward the one side width surface 21a from the other side width surface 22a. The first line 23a has a shape extending from the one side width surface 21a to the axial central region of the first split outer ring member 12a so that the axial center of the end portion 14a protrudes in the circumferential direction. The 2nd line 24a is a shape extended from the other side width surface 22a to the center area of the axial direction of the 1st division | segmentation outer ring member 12a so that the center of the axial direction of the edge part 14a may protrude in the circumferential direction. 2, the angle B ₁ of when viewed from the outer diameter side, whereas the line 25a constituting the side width surface 21a and the first line 23a is obtuse. Further, the angle _{B 2} between the line 26a and the second line 24a constituting the other side width surface 22a is also obtuse. The end portion 14a is configured such that the center in the axial direction has a convex portion 27a protruding in the circumferential direction. That is, when viewed from the outer diameter side, the shape of the end portion 14a constituted by the first wire 23a and the second wire 24a is a shape protruding in a substantially V shape.

  Here, the 1st division | segmentation outer ring member 12a is between the axial direction of the edge part 28a by the side of the other side width surface 22a of the 1st line 23a, and the edge part 29a by the side of the one side width surface 21a of the 2nd line 24a. It includes a single engaging portion 31a that is provided and extends to the outer diameter side. The engaging portion 31a is provided in the distal end region in the circumferential direction of the convex portion 27a. The engaging portion 31a engages with the housing when the needle roller bearing is incorporated into the housing. This will be described later.

  Next, the structure of the engaging part 31a is demonstrated. FIG. 4 is a cross-sectional view in which the central region in the axial direction is cut by a plane perpendicular to the rotation axis 13 in the circumferential end 14 a of the first divided outer ring member 12 a. For easy understanding, a needle roller 19 included in a later-described needle roller bearing is shown in cross section. In this case, the needle roller 19 corresponds to a cross section cut along a plane perpendicular to the rolling axis.

1 to 4, the engaging portion 31 a is provided so as to extend straight to the outer diameter side. Projection amount of the engagement portion 31a, i.e., the length L ₁ in the radial direction to the end 32a made of arc-shaped outer surface 17a and the distal end of the outer diameter side of the engaging portion 31a has a length in FIG. 4 first divided from the inner diameter surface 16a of the outer ring member 12a in the radial direction to the outer diameter surface 17a length represented by L _2, i.e., it is constructed slightly longer than the thickness of the so-called first split outer ring member 12a .

  The engaging portion 31a is formed by bending a protruding portion protruding in the circumferential direction of the first divided outer ring member 12a to the outer diameter side. FIG. 5 is a view of the first divided outer ring member 12a having a protruding portion protruding in the circumferential direction before bending, as viewed from the outer diameter side. The front side in FIG. 5 is the outer diameter surface 17a side of the first divided outer ring member 12a. Referring to FIG. 5, a protruding portion 33 a protruding in the circumferential direction is provided at the center in the axial direction of the end portion 14 a of the first divided outer ring member 12 a. The protruding portion 33a is provided in a substantially rectangular shape in the region protruding in the circumferential direction of the protruding portion 27a. The protruding portion 33a is bent approximately 90 ° toward the outer diameter side to form the engaging portion 31a. By this bending, the region on the raceway surface side is configured to be connected with a smooth curved surface from the inner diameter surface 16a constituting the raceway surface toward the outer diameter side.

Next, the configuration of the end portion 15a on the other side in the circumferential direction of the first divided outer ring member 12a will be described. The other end 15a in the circumferential direction of the first divided outer ring member 12a also abuts with the end 14b of the second divided outer ring member 12b adjacent in the circumferential direction. The outer shape of the end portion 15a is a first line 35a extending obliquely with respect to the rotation axis 13 from the one-side width surface 21a toward the other-side width surface 22a when viewed from the radial direction, here the outer diameter side. And a second line 36a extending obliquely with respect to the rotation axis 13 from the other side width surface 22a toward the one side width surface 21a. The first line 35a has a shape extending from the one side width surface 21a to the axial central region of the first split outer ring member 12a so that the axial center of the end 15a is recessed in the circumferential direction. The 2nd line | wire 36a is a shape extended from the other side width surface 22a to the center area of the axial direction of the 1st division | segmentation outer ring member 12a so that the center of the axial direction of the edge part 15a may be dented in the circumferential direction. 3, the angle B ₃ of when viewed from the outer diameter side, whereas the line 37a constituting the side width surface 21a and the first line 35a is an acute angle. Further, the angle _{B 4} between the line 38a and the second line 36a constituting the other side width surface 22a is also acute. The end 15a is configured such that the axial center forms a recess 39a that is recessed in the circumferential direction. That is, when viewed from the outer diameter side, the shape of the end portion 15a constituted by the first line 35a and the second line 36a is a substantially V-shaped shape.

  Here, the 1st division | segmentation outer ring member 12a is between the axial direction of the edge part 40a by the side of the other side width surface 22a of the 1st line 35a, and the edge part 41a by the side of the one side width surface 21a of the 2nd line 36a. A receiving recess 42a is provided that receives the engaging portion 31b provided in the adjacent second divided outer ring member 12b. The receiving recess 42a is provided so as to be further recessed in the circumferential direction in the region of the recess 39a that is most recessed in the circumferential direction. The receiving recess 42a is provided in a substantially rectangular shape so as to be recessed in the circumferential direction. The receiving recess 42a is a portion protruding in the circumferential direction in the engaging portion 31b of the second divided outer ring member 12b when the first divided outer ring member 12a and the second divided outer ring member 12b are brought into contact with each other. accept.

FIG. 6 shows a state in which one end 14a in the circumferential direction of the first divided outer ring member 12a and the other end 15b in the circumferential direction of the second divided outer ring member 12b are abutted. FIG. 6 corresponds to the diagram shown in FIG. In FIG. 6, needle rollers 19 that roll on the inner diameter surfaces 16 a and 16 b are illustrated by dotted lines. In this case, by moving the first split outer ring member 12a in the direction indicated by arrow A ₁ facing one side in the circumferential direction shown in FIG. Referring to FIG. 6, circumferential end 14a of first divided outer ring member 12a mainly composed of first line 23a and second line 24a has first line 35b and second line. The end 15b in the circumferential direction of the second divided outer ring member 12b mainly composed of 36b and the concavo-convex shape are engaged and abutted.

In addition, the 2nd division | segmentation outer ring member 12b is the same structure as the 1st division | segmentation outer ring member 12a. That is, when viewed from the outer diameter side, the outer shape of the end portion 14b is relative to the rotation axis 13 from the one side width surface 21b located on one side in the axial direction toward the other side width surface 22b located on the other side in the axial direction. And a first line 23b extending obliquely and a second line 24b extending obliquely with respect to the rotation axis 13 from the other-side width surface 22b toward the one-side width surface 21b. The first line 23b has a shape extending from the one-side width surface 21b to the axial center region of the second divided outer ring member 12b so that the axial center of the end portion 14b protrudes in the circumferential direction. The 2nd line 24b is a shape extended from the other side width surface 22b to the center area of the axial direction of the 2nd division | segmentation outer ring member 12b so that the center of the axial direction of the edge part 14b may protrude in the circumferential direction. 3, an angle B ₁ of when viewed from the outer diameter side, whereas the line 25b constituting the side width surface 21b and the first line 23b is an obtuse angle. Further, the angle _{B 2} between the line 26b and the second line 24b which constitutes the other side width surface 22b is also obtuse. The end portion 14b is configured such that the center in the axial direction has a convex portion 27b protruding in the circumferential direction. That is, when viewed from the outer diameter side, the shape of the end portion 14b composed of the first wire 23b and the second wire 24b is a shape protruding in a substantially V shape.

  The second split outer ring member 12b is provided between the end portion 28b of the first line 23b on the other side width surface 22b side and the end portion 29b of the second line 24b on the one side width surface 21b side in the axial direction. And includes one engaging portion 31b extending to the outer diameter side. The engaging portion 31b is provided in the distal end region in the circumferential direction of the convex portion 27b. The engaging portion 31b engages with the housing when the needle roller bearing is incorporated into the housing.

The outer shape of the other end 15b in the circumferential direction of the second divided outer ring member 12b has the same configuration, and when viewed from the outer diameter side, it rotates from the one side width surface 21b toward the other side width surface 22b. It has the 1st line 35b extended incline with respect to the axis line 13, and the 2nd line 36b extended incline with respect to the rotating shaft line 13 toward the one side width surface 21b from the other side width surface 22b. The first line 35b has a shape extending from the one side width surface 21b to the axial central region of the second divided outer ring member 12b so that the axial center of the end 15b is recessed in the circumferential direction. The 2nd line 36b is a shape extended from the other side width surface 22b to the axial center area of the 2nd division | segmentation outer ring member 12b so that the center of the axial direction of the edge part 15b may be dented in the circumferential direction. 2, the angle B ₃ of when viewed from the outer diameter side, whereas the line 37b constituting the side width surface 21b and the first line 35b is an acute angle. Further, the angle _{B 4} between the line 38b and the second line 36b which constitutes the other side width surface 22b is also acute. The end 15b is also configured such that the axial center forms a recess 39b that is recessed in the circumferential direction. That is, when viewed from the outer diameter side, the shape of the end portion 15b composed of the first line 35b and the second line 36b is a substantially V-shaped shape.

  The second split outer ring member 12b is also provided between the end portion 40b of the first line 35b on the other side width surface 22b side and the end portion 41b of the second line 36b on the one side width surface 21b side in the axial direction. A receiving recess 42b is provided for receiving the engaging portion 31a provided in the adjacent first divided outer ring member 12a. The receiving recess 42b is provided so as to be further recessed in the circumferential direction in the region of the recess 39b that is most recessed in the circumferential direction. The receiving recess 42b is provided in a substantially rectangular shape so as to be recessed in the circumferential direction. The receiving recess 42b is a portion protruding in the circumferential direction in the engaging portion 31a of the first divided outer ring member 12a when the first divided outer ring member 12a and the second divided outer ring member 12b are brought into contact with each other. accept.

  The outer ring 11 according to an embodiment of the present invention is configured by combining the first divided outer ring member 12a and the second divided outer ring member 12b.

  Next, a configuration of a needle roller bearing including the outer ring 11 according to an embodiment of the present invention and a rotary shaft support structure including the needle roller bearing will be described. 7 and 8 are cross-sectional views showing the configuration of a needle roller bearing including an outer ring 11a according to an embodiment of the present invention and a rotary shaft support structure including the needle roller bearing. FIG. 7 shows a state in which the constituent members are disassembled, and FIG. 8 shows a state in which the constituent members are combined. 7 and 8 are sectional views cut along a plane extending in a direction perpendicular to the rotation axis 13 of the rotation shaft supported by the needle roller bearing. That is, the rotating shaft supported by the needle roller bearing is configured to extend in the front and back direction of the paper.

  First, the configuration of the needle roller bearing 44a will be described with reference to FIGS. The needle roller bearing 44a according to the present invention rotatably supports the rotary shaft 45 disposed on the inner diameter side. The needle roller bearing 44a includes the outer ring 11a configured as described above, and a plurality of needle rollers 19 that roll on the raceway surface positioned on the inner diameter surfaces 16a and 16b of the outer ring 11a and the outer diameter surface 46 of the rotary shaft 45. And a retainer 47a for holding a plurality of needle rollers 19.

  Here, the structure of the cage 47a will be described. The cage 47a is configured by combining two split cage members 48a and 49a. The outer shapes of the first and second split cage members 48a and 49a are substantially semi-cylindrical, respectively. That is, each of the first and second divided cage members 48a and 49a has a shape obtained by cutting a cylindrical member at two circumferential positions facing each other by 180 °. The annular retainer 47a is configured to be annular by combining a pair of first and second split retainer members 48a and 49a.

  The first split cage member 48a includes a plurality of column portions that are provided in a plurality at intervals in the circumferential direction so as to form pockets (not shown) that extend in the axial direction and accommodate needle rollers. It is a structure provided with a pair of connection part which connects the axial direction both ends of each pillar part so that the space | interval of the circumferential direction between parts may be maintained. The configuration of the second split cage member 49a is the same as the configuration of the first split cage member 48a. 7 and 8 show the case where the cage 47a is cut by a cross section including one connecting portion located on one end side in the axial direction.

  The needle roller bearing 44a incorporates first and second split cage members 48a and 49a each containing the needle roller 19 in a pocket from the outer diameter side of the rotary shaft 45, and further from the outer diameter side thereof. The first and second divided outer ring members 12a and 12b are incorporated.

  Next, the structure of the rotating shaft support structure according to the present invention will be described. The rotating shaft support structure 51a includes the needle roller bearing 44a configured as described above, a rotating shaft 45 that is rotatably supported by the needle roller bearing 44a, and a housing 52a. The rotation shaft 45 extends in the front and back direction of the paper. The rotating shaft support structure 51a includes a crankshaft supporting structure that supports a crankshaft as the rotating shaft 45, a camshaft supporting structure that supports a camshaft as the rotating shaft 45, and a balance shaft as the rotating shaft 45. It is effectively used in a supporting structure for supporting a balance shaft.

  Here, the housing 52a includes a housing upper part 53a located on the upper side and a housing lower part 54a located on the lower side. The housing upper portion 53a is a member corresponding to a bearing cap when the rotating shaft support structure 51a is a camshaft support structure, for example. The housing lower portion 54a is a member corresponding to a cylinder head when the rotating shaft support structure 51a is a camshaft support structure, for example.

  The housing upper portion 53a includes an arc portion 56a in which an arc surface 55a that contacts the outer diameter surface of the outer ring 11a is provided, and a pair of flat portions 57a and 58a that extend outward from both ends of the arc portion 56a. . The arc portion 56a and the flat portions 57a and 58a have a predetermined thickness. The flat portions 57a and 58a are provided with bolt holes 59a and 60a for fastening the housing upper portion 53a and the housing lower portion 54a with bolts, respectively. The bolt holes 59a and 60a are provided so as to pass straight through the flat portions 57a and 58a in the thickness direction. Of the flat portions 57a and 58a, the surface located on the housing lower portion 54a side, that is, in FIG. Surfaces located on the lower side of the drawing are flat surfaces 61a and 62a.

  Here, the housing upper portion 53a is provided with a first engagement hole 63a having a shape for receiving the engagement portion 31a provided in the first divided outer ring member 12a. The first engagement hole 63a is provided so as to be recessed outward from the surface 61a and the circular arc surface 55a located on the lower side of the flat portion 57a on one side.

  The housing lower part 54a includes a block-shaped base 65a provided with an arcuate surface 64a in contact with the outer diameter surface of the outer ring 11a. Of the base 65a, the surface located on the housing upper portion 53a side excluding the arc surface 64a, that is, the surface located on the upper side in FIG. 7 is a flat surface 66a, 67a. On the flat surfaces 66a and 67a, when the housing upper part 53a and the housing lower part 54a are combined, bolt holes 68a and 69a into which bolts can be screwed are provided in regions corresponding to the bolt holes 59a and 60a. .

  The housing lower portion 54a is provided with a second engagement hole 70a having a shape for receiving the engagement portion 31b provided in the second divided outer ring member 12b. The second engagement hole 70a is provided so as to be recessed outward from the surface 67a and the arc surface 64a located on the upper side of the base 65a. The first and second engagement holes 63a and 70a are provided at positions facing each other by 180 °.

  The rotating shaft support structure 51a is configured by incorporating a needle roller bearing 44a so as to support the rotating shaft 45 in a space formed between the housing upper portion 53a and the housing lower portion 54a. The housing upper portion 53a and the housing lower portion 54a are fastened and fixed by bolts 71a and 72a using bolt holes 59a, 60a, 68a and 69a. Specifically, the bolts 71a and 72a are inserted through the bolt holes 59a and 60a, respectively, and screwed into the bolt holes 68a and 69a. In this case, the surfaces 61a and 62a of the housing upper portion 53a come into contact with the surfaces 66a and 67a of the housing lower portion 54a, respectively. Further, the arc surface 55a of the housing upper portion 53a abuts on the outer diameter surface 17a of the first divided outer ring member 12a constituting the outer ring 11a, and the arc surface 64a of the housing lower portion 54a is the second divided portion constituting the outer ring 11a. It will contact | abut to the outer diameter surface 17b of the outer ring member 12b.

  Here, the needle roller bearing 44a engages the engaging portion 31a provided in the first divided outer ring member 12a with the first engaging hole 63a provided in the housing upper portion 53a, and the second divided portion. The engaging portion 31b provided in the outer ring member 12b is engaged with the second engaging hole 70a provided in the housing lower portion 54a, and incorporated into the housing 52a. In this way, the rotating shaft support structure 51a is configured.

According to such a configuration, the outer shape of the circumferential end 14a that abuts the second divided outer ring member 12b adjacent in the circumferential direction in the first divided outer ring member 12a is viewed from the radial direction. Further, a first line 23a extending obliquely with respect to the rotation axis 13 of the needle roller bearing 44a from the one side width surface 21a toward the other side width surface 22a, and a needle from the other side width surface 22a toward the one side width surface 21a And the second line 24a extending obliquely with respect to the rotation axis 13 of the tapered roller bearing 44a, and is configured to mesh with the circumferential end 15b of the second divided outer ring member 12b adjacent in the circumferential direction. The first line 23a and the second line 24a extending in an inclined manner are properly meshed with each other, and the axial movement of the adjacent first and second divided outer ring members 12a and 12b is restricted. That is, the movement direction or to the opposite direction shown by arrow A ₂ in FIG. 2 and FIG. 3 is restricted. In this case, since the first line 23a and the second line 24a extend so as to be inclined with respect to the rotational axis 13 of the needle roller bearing 44a, the adjacent first and second split outer rings are adjacent to each other. In the abutting regions of the members 12a and 12b, the risk of line contact with the portion that abuts the needle roller can be reduced, and the needle roller 19 can be smoothly rolled. Further, one engaging portion 31a provided in the first divided outer ring member 12a is engaged with the housing 52a, specifically, the first engaging hole 63a provided in the housing upper portion 53a, and the second One engaging portion 31b provided in the divided outer ring member 12b is engaged with the housing 52a, specifically, the second engaging hole 70a provided in the housing lower portion 54a, so that the first and second divided portions are engaged. Since rotation of the outer ring members 12a and 12b can be prevented, in the first and second divided outer ring members 12a and 12b incorporated in two, the first and second divided outer ring members 12a and 12b are moved in the circumferential direction. Can be regulated. In this case, for the first split outer ring member 12a, it is only necessary to provide one engaging portion 31a at the end 14a on one side, and for the second split outer ring member 12b, at the end 14b on one side. It is only necessary to provide one engaging portion 31b, and it is also necessary to provide only one first engaging hole 63a and second engaging hole 70a corresponding to each engaging portion 31a, 31b. Therefore, an inexpensive configuration can be obtained. Therefore, the productivity is good, and the first and second divided outer ring members 12a and 12b can be appropriately positioned when assembled in the housing 52a.

  In this case, since the engaging portions 31a and 31b are formed to be bent to the outer diameter side, the joint portion with the raceway surface of the needle roller 19 located on the inner diameter surfaces 17a and 17b side is formed into a smooth curved surface. It can be a shape. If it does so, rolling of the needle roller 19 can be made smooth, and vibration and noise can be reduced.

  In addition, it is good also as following structures. 9 and 10 are cross-sectional views showing a rotating shaft support structure according to another embodiment of the present invention. FIG. 9 shows a state in which the constituent members are disassembled, and FIG. 10 shows a state in which the constituent members are combined. 9 and 10 correspond to the cross sections shown in FIGS. 7 and 8, respectively. In addition, about the same structural member as the structural member shown in FIG.7 and FIG.8, the same code | symbol is attached | subjected and those description is abbreviate | omitted.

  Referring to FIGS. 9 and 10, a rotary shaft support structure 51b according to another embodiment of the present invention includes a needle roller bearing 44a having the above-described configuration, and a rotation that is rotatably supported by needle roller bearing 44a. A shaft 45 and a housing 52b are included. The housing 52b includes an upper housing portion 53b located on the upper side and a lower housing portion 54b located on the lower side.

  The housing upper portion 53b includes an arc portion 56b in which an arc surface 55b that contacts the outer diameter surface of the outer ring 11a is provided inside, and a pair of flat portions 57b and 58b extending outward from both ends of the arc portion 56b. . The arc portion 56b and the flat portions 57b and 58b have a predetermined thickness. The flat portions 57b and 58b are respectively provided with bolt holes 59b and 60b for fastening the housing upper portion 53b and the housing lower portion 54b with bolts. Bolt holes 59b and 60b are provided so as to pass straight through the flat portions 57b and 58b in the thickness direction. Of the flat portions 57b and 58b, the surface located on the housing lower portion 54b side, that is, in FIG. Surfaces located on the lower side of the drawing are flat surfaces 61b and 62b.

The housing upper portion 53b is provided with a first engagement hole 63b having a shape for receiving the engagement portion 31a provided in the first divided outer ring member 12a. Unlike the embodiment shown in FIG. 7, the first engagement hole 63b does not face the lower surface 61b of the housing upper portion 53b, and is provided so that a part of the arc surface 55b is recessed outward. It has been. In the cross section shown in FIG. 9, the angle C ₁ between the surface 73b and the surface 61b located closest to the surface 61b side of the wall surface constituting the first engaging hole 63b is shown at an acute angle.

  The housing lower part 54b includes a block-like base 65b provided with an arcuate surface 64b in contact with the outer diameter surface of the outer ring 11a. Of the base 65b, the surface located on the housing upper portion 53b side excluding the arc surface 64b, that is, the surface located on the upper side in FIG. 9 is a flat surface 66b, 67b. On the flat surfaces 66b and 67b, when the housing upper portion 53b and the housing lower portion 54b are combined, bolt holes 68b and 69b into which bolts can be screwed are provided in regions corresponding to the bolt holes 59b and 60b. .

The housing lower portion 54b is provided with a lubricating oil passage 74b for supplying lubricating oil to the needle roller bearing 44a. The lubricating oil passage 74b extends upward from the lower region of the base 65b, and further bends toward the arc surface 64b to have an opening hole 75b in a part of the arc surface 64b. The opening hole 75b does not face the surface 67b of the housing lower part 54b, and is provided so that a part of the arc surface 64b is recessed outward. In the cross section shown in FIG. 9, the angle C ₂ between the surface 76b and the surface 67b located closest to the surface 67b side of the wall surface constituting the opening hole 75b is shown at an acute angle. The first engagement hole 63b and the opening hole 75b are provided at positions facing each other by 180 °. The lubricating oil can be passed from the opening hole 75b to the needle roller bearing 44a via the lubricating oil passage 74b.

  Here, the opening hole 75b is configured to receive the engagement portion 31b provided in the second divided outer ring member 12b. That is, the opening hole 75b has a configuration that also serves as the function of the second engaging portion 70a in the embodiment shown in FIG.

This will be described as follows. Figure 11 is an enlarged view seen from the direction of an aperture hole 75b by an arrow D ₁ of the in FIGS. Referring to FIG. 11, when the first divided outer ring member 12a and the second divided outer ring member 12b are abutted, there is a slight gap between the engagement portion 31b and the receiving recess 42a between the circumferential direction and the axial direction. A gap 77b is formed. Through this gap 77b, the lubricating oil supplied from the base 65b side using the lubricating oil passage 74b is supplied into the needle roller bearing 44a.

  The rotating shaft support structure 51b is configured by incorporating a needle roller bearing 44a so as to support the rotating shaft 45 in a space formed between the housing upper portion 53b and the housing lower portion 54b. The housing upper portion 53b and the housing lower portion 54b are fastened and fixed by bolts 71a and 72a using bolt holes 59b, 60b, 68b and 69b. In this case, the surfaces 61b and 62b of the housing upper portion 53b come into contact with the surfaces 66b and 67b of the housing lower portion 54b, respectively. Further, the arc surface 55b of the housing upper portion 53b abuts on the outer diameter surface 17a of the first divided outer ring member 12a constituting the outer ring 11a, and the arc surface 64b of the housing lower portion 54b is the second divided portion constituting the outer ring 11a. It will contact | abut to the outer diameter surface 17b of the outer ring member 12b.

  Here, the needle roller bearing 44a engages the engaging portion 31a provided in the first divided outer ring member 12a with the first engaging hole 63b provided in the housing upper portion 53b, and the second divided outer ring member 12a. The engaging portion 31b provided in the outer ring member 12b is engaged with the opening hole 75b that also serves as the second engaging hole provided in the housing lower portion 54a, and is incorporated into the housing 52b. Thus, the rotating shaft support structure 51b is configured.

  According to such a structure, since the engaging part is engaged using the opening hole for letting lubricating oil flow, it is not necessary to newly provide an engaging hole. Accordingly, it is possible to reduce the number of further processing steps and to further reduce the cost. In this case, since the lubricating oil is supplied to the center side in the axial direction of the raceway surface, the needle roller 19 can be further smoothly rolled.

  In this case, in the circumferential direction, the divided portion of the housing 52b, that is, the portion where the housing upper portion 53b and the housing lower portion 54b are in contact with the abutting portions of the first and second divided outer ring members 12a and 12b are shifted in the circumferential direction. be able to. Then, the roundness of the outer ring 11a constituted by the first and second divided outer ring members 12a and 12b can be made higher by appropriately fitting the abutting portions along the arc surfaces of the housing upper part 53b and the housing lower part 54b. it can. Therefore, further smooth rolling of the needle roller 19 can be achieved.

  The following configuration may also be used. FIG. 12 is a view showing a part of a first split outer ring member constituting an outer ring included in a needle roller bearing provided in a rotary shaft support structure according to still another embodiment of the present invention. FIG. 12 is a view of the first split outer ring member having a protruding portion protruding in the circumferential direction before bending, as viewed from the outer diameter side, and corresponds to FIG. FIG. 13 is a cross-sectional view showing a rotating shaft support structure according to still another embodiment of the present invention. FIG. 13 shows a state in which the constituent members are combined. FIG. 13 corresponds to the cross section shown in FIG. In FIG. 13, the same constituent members as those shown in FIG. 8 are denoted by the same reference numerals, and the description thereof is omitted.

  First, referring to FIG. 12, a protruding portion 33c protruding in the circumferential direction is provided at the center in the axial direction of the end portion 14c of the first divided outer ring member 12c. The protruding portion 33c is provided in a substantially rectangular shape in the region protruding in the circumferential direction of the protruding portion 27c. The protruding portion 33c is bent approximately 90 ° to the outer diameter side to form the engaging portion 31c. By this bending, the region on the raceway surface side becomes a configuration in which a smooth curved surface is continuous from the inner diameter surface 16c constituting the raceway surface toward the outer diameter side.

Here, the projecting amount of the engaging portion 31c, i.e., arc-shaped outer diameter surface 17c shown by the length L ₃ in FIG. 12, here, it is represented by the end 28c of the first line 23c, the length in the radial direction from the portion to the end portion 32c of the distal end of the outer diameter side of the engaging portion 31c is arcuate surface 55c and the lower housing part of the housing top 53c shown by the length L ₄ in FIG. 13 It is configured to have the same length from a portion 78c intersecting with the surface 61c facing 54c to a width surface 79c which is an end portion in the width direction of the flat portion 57c. And the through-hole 80c penetrated in the thickness direction is provided in the part corresponding to the bolt hole 59c. The second split outer ring member 12d has the same configuration.

  The rotating shaft support structure 51c is configured by incorporating a needle roller bearing 44c so as to support the rotating shaft 45 in a space formed between the housing upper portion 53c and the housing lower portion 54c. The housing upper portion 53c and the housing lower portion 54c are bolts 71a, 72a using bolt holes 59c, 60c, 68c, 69c, and through holes 80c and through holes 80d provided in the second divided outer ring member 12d. Fastened and fixed. Specifically, the bolts 71a and 72a are inserted into the bolt holes 59c and 60c and the through holes 80c and 80d, respectively, and screwed into the bolt holes 68c and 69c. In this case, the surfaces 61c and 62c of the housing upper portion 53c come into contact with the upper surface 81c of the engaging portion 31c and the upper surface 81d of the engaging portion 31d, respectively. The surfaces 66c and 67c of the housing lower portion 54a come into contact with the lower surface 82c of the engaging portion 31c and the lower surface 82d of the engaging portion 31d, respectively.

  In this case, the needle roller bearing 44c includes an engaging portion 31c provided on the first divided outer ring member 12c and an engaging portion 31d provided on the second divided outer ring member 12d, respectively. It becomes the structure pinched | interposed into the lower part 54c. Thus, the rotating shaft support structure 51c is configured.

  It is good also as comprising in this way. By doing so, the first and second divided outer ring members 12c and 12d can be more reliably positioned.

  In the above embodiment, the cage included in the needle roller bearing is composed of two divided cage members. However, the invention is not limited to this, and a part of the circumferential direction is cut. An integrated cage may be used.

  14 and 15 are diagrams showing the cage in this case. Referring to FIGS. 14 and 15, a plurality of cages 47 d are provided in the circumferential direction so as to extend in the axial direction and form pockets (not shown) for accommodating needle rollers. It is the structure provided with a pillar part and a pair of connection part which connects the axial direction both ends of each pillar part so that the space | interval of the circumferential direction between pillar parts may be maintained. 14 and 15 show the case where the cage 47d is cut by a cross section including one connecting portion located on one end side in the axial direction.

  The retainer 47d has a shape obtained by cutting one annular member at an arbitrary position in the circumferential direction. The retainer 47d is formed in a ring shape with the circumferential ends 83c and 83d facing each other in the cut divided portion. The retainer 47d is made of an elastically deformable member, and can widen the distance between both end portions 83c and 83d. FIG. 14 shows a case where the end portions 83c and 83d are opposed to each other to form a cylindrical shape, and FIG. 15 shows a state in which the interval between the end portions 83c and 83d is expanded. As such a configuration, the cage 47d can be incorporated from the outer diameter side of the rotating shaft 45.

  16 is a cross-sectional view showing a rotary shaft support structure 51d including a needle roller bearing 44d including the retainer 47d shown in FIGS. 14 and 15, and corresponds to FIG. Referring to FIG. 16, a rotating shaft support structure 51 d according to still another embodiment of the present invention includes first divided outer ring members 12 a and 12 b configured as described above, a plurality of needle rollers 19, and the above-described diagram. 14 and a needle roller bearing 44d including a cage 47d shown in FIG. 15, a rotating shaft 45 rotatably supported by the needle roller bearing 44d, and a housing 52a. The housing 52a includes a housing upper part 53a located on the upper side and a housing lower part 54a located on the lower side. Since the configuration other than the cage 47d is the same as that shown in FIG. 8, the description thereof is omitted. You may comprise in this way.

  In the above embodiment, in the first split outer ring member 12a, when viewed from the radial direction, the angle formed by the line constituting the one side width surface and the first line and the other side width surface are configured. The angle formed between the first line and the first line is configured to be an obtuse angle. However, the present invention is not limited to this, and the angle formed between the line forming the one-side width surface and the first line is an obtuse angle. Yes, the angle formed by the line forming the other side width surface and the first line may be an acute angle.

  FIG. 17 is a perspective view showing the outer ring in this case, and corresponds to FIG. Referring to FIG. 17, an outer ring 11e according to still another embodiment of the present invention is configured by combining a pair of first divided outer ring member 12e and second divided outer ring member 12f.

  Next, the structure of the 1st division | segmentation outer ring member 12e which forms the outer ring | wheel 11e is demonstrated. FIGS. 18 and 19 are enlarged views of the end portions 14e and 15e in the circumferential direction of the first divided outer ring member 12e as seen from the outer diameter side. 18 shows an end portion 14e on one side in the circumferential direction of the first divided outer ring member 12e, and corresponds to a portion shown in a region XVIII in FIG. FIG. 19 shows the other end 15e in the circumferential direction of the first divided outer ring member 12e, and corresponds to a portion shown in a region XIX in FIG. For easy understanding, in FIG. 18 and FIG. 19, one end portion 14 f of the second divided outer ring member 12 f and the other end portion 15 f of the second divided outer ring member 12 f are also illustrated. ing.

  With reference to FIGS. 17-19, the external shape of the 1st division | segmentation outer ring member 12e is a substantially semicylindrical shape. That is, the 1st division | segmentation outer ring member 12e is a shape which cut | disconnected the cylindrical member in two places of the circumferential direction which opposes 180 degrees. The inner diameter surface 16e of the first split outer ring member 12e serves as a raceway surface on which the needle rollers roll. The 1st division | segmentation outer ring member 12e is a structure which does not have what is called a wrinkle, and has predetermined | prescribed thickness. The first split outer ring member 12e is provided with a through hole 18e that penetrates straight from the inner diameter surface 16e toward the outer diameter surface 17e in the radial direction. The through hole 18e is provided closer to the other end 15e in the circumferential direction of the first split outer ring member 12e when viewed from the axial direction. The through hole 18e is provided on the inner diameter surface 16e side so that the opening is located on the raceway surface on which the needle rollers roll. Specifically, the through hole 18e is provided at the center in the axial direction. The through hole 18e is used for passing lubricating oil in the radial direction. Similarly, the second divided outer ring member 12f has a through-hole for lubricating oil passage that has an inner diameter surface 16f serving as a raceway surface and passes straight from the inner diameter surface 16f toward the outer diameter surface 17f in the radial direction. 18f is provided.

Next, the edge part 14e of the one side of the circumferential direction of the 1st division | segmentation outer ring member 12e is demonstrated. One end 14e in the circumferential direction of the first divided outer ring member 12e abuts with the second divided outer ring member 12f adjacent in the circumferential direction. When viewed from the outer diameter side, the outer shape of the end portion 14e is inclined with respect to the rotation axis 13 from the one side width surface 21e located on one side in the axial direction toward the other side width surface 22e located on the other side in the axial direction. And a second line 24e extending obliquely with respect to the rotation axis 13 from the other side width surface 22e toward the one side width surface 21e. The first line 23e is the center in the axial direction of the first split outer ring member 12e from the one side width surface 21e so that the region on the one side width surface 21e side of the end portion 14e protrudes in the circumferential direction from the center in the axial direction. The shape extends to the area. The second line 24e is a central region in the axial direction of the first divided outer ring member 12e from the other side width surface 22e so that a region on the other side width surface 22e side of the end portion 14e is recessed in the circumferential direction from the center in the axial direction. It is a shape extending to. In FIG. 18, when viewed from the outer diameter side, an angle E ₁ formed by the line 25e constituting the one-side width surface 21e and the first line 23e is an acute angle. Further, the angle _{E 2} of the line 26e and the second line 24e constituting the other side width surface 22e is an obtuse angle. When viewed from the outer diameter side, the first line 23e and the second line 24e are configured in the same direction, here, in parallel.

  Here, the first split outer ring member 12e is between the end portion 28e on the other side width surface 22e side of the first line 23e and the end portion 29e on the one side width surface 21e side of the second line 24e. It includes one engaging portion 31e that is provided and extends to the outer diameter side. The engaging portion 31e is provided near the end portion 28e on the other side width surface 22e side of the first line 23e. The engaging portion 31e engages with the housing when the needle roller bearing is incorporated into the housing.

  Next, the configuration of the engaging portion 31e will be described. FIG. 20 is a cross section in which the axial central region of the circumferential end portion 14 e of the first split outer ring member 12 e is cut by a plane perpendicular to the rotation axis 13. For easy understanding, the needle roller 19 included in the needle roller bearing is shown in cross section. In this case, the needle roller 19 corresponds to a cross section cut along a plane perpendicular to the rolling axis.

Referring to FIGS. 17 to 20, the engaging portion 31 e is provided so as to extend straight to the outer diameter side. Projection amount of the engagement portion 31e, i.e., the length in the radial direction from the arcuate outer surface 17e to the end 32e of the distal end of the outer diameter side of the engaging portion 31e L _5, the length in FIG. 20 first divided from the inner diameter surface 16e of the outer ring member 12e in the radial direction to the outer diameter surface 17e length represented by L _6, i.e., it is constructed slightly longer than the thickness of the so-called first split outer ring member 12e . The engaging portion 31e is formed by bending a protruding portion protruding in the circumferential direction of the first divided outer ring member 12e to the outer diameter side. By this bending, the region on the raceway surface side becomes a configuration in which a smooth curved surface continues from the inner diameter surface 16e constituting the raceway surface toward the outer diameter side.

The first split outer ring member 12e is provided between the end portion 28e on the other side width surface 22e side of the first line 23e and the end portion 29e on the one side width surface 21e side of the second line 24e in the axial direction. A receiving recess 42e for receiving the engaging portion 34f provided in the adjacent second divided outer ring member 12f is provided. FIG. 21 shows a state in which one end 14e in the circumferential direction of the first divided outer ring member 12e and the other end 15f in the circumferential direction of the second divided outer ring member 12f are brought into contact with each other. FIG. 21 corresponds to the diagram shown in FIG. In FIG. 21, the needle roller 19 that rolls toward the inner diameter side is indicated by a dotted line. In this case, by moving the first split outer ring member 12e in a direction indicated by an arrow A ₁ facing one side in the circumferential direction shown in FIG. 18.

  Referring to FIG. 21, circumferential end 14e of first divided outer ring member 12e mainly composed of first line 23e and second line 24e has first line 35f and second line The end 15f in the circumferential direction of the second divided outer ring member 12f mainly composed of 36f and the concavo-convex shape are engaged with each other.

Next, the configuration of the end 15e on the other side in the circumferential direction of the first divided outer ring member 12e will be described. The other end 15e in the circumferential direction of the first divided outer ring member 12e abuts with a second divided outer ring member 12f adjacent in the circumferential direction. When viewed from the outer diameter side, the outer shape of the end portion 15e is inclined with respect to the rotation axis 13 from the one side width surface 21e located on one side in the axial direction toward the other side width surface 22e located on the other side in the axial direction. And a second line 36e extending obliquely with respect to the rotation axis 13 from the other side width surface 22e toward the one side width surface 21e. The first line 35e is the center in the axial direction of the first split outer ring member 12e from the one side width surface 21e so that the region on the one side width surface 21e side in the end portion 15e protrudes in the circumferential direction from the center in the axial direction. The shape extends to the area. The second line 36e is a central region in the axial direction of the first divided outer ring member 12e from the other side width surface 22e so that the region on the other side width surface 22e side of the end portion 15e is recessed in the circumferential direction from the center in the axial direction. It is a shape extending to. 19, the angle E ₃ of when viewed from the outer diameter side, whereas the line 37e and the first line 35e constituting the side width surface 21e is an acute angle. Further, the angle _{E 4} of the line 38e and the second line 36e constituting the other side width surface 22e is an obtuse angle. When viewed from the outer diameter side, the first line 35e and the second line 36e are configured in the same direction, here, in parallel.

  Here, the first split outer ring member 12e is between the end 40e on the other side width surface 22e side of the first line 35e and the end 41e on the one side width surface 21e side of the second line 36e. One engaging portion 34e is provided and extends toward the outer diameter side. The engaging portion 34e is provided near the end portion 40e on the other side width surface 22e side of the first line 35e. The engaging portion 34e engages with the housing when the needle roller bearing is incorporated into the housing.

  The first split outer ring member 12e is provided between the end portion 40e on the other side width surface 22e side of the first line 35e and the end portion 41e on the one side width surface 21e side of the second line 36e in the axial direction. A receiving recess 50e for receiving the engaging portion 31f provided in the adjacent second divided outer ring member 12f is provided.

The second divided outer ring member 12f has the same configuration as the first divided outer ring member 12e. That is, the outer shape of the end 14f on one side in the circumferential direction of the second divided outer ring member 12f is from the one side width surface 21f located on the one side in the axial direction to the other side in the axial direction when viewed from the outer diameter side. A first line 23f extending obliquely with respect to the rotational axis 13 toward the other-side width surface 22f and a second line extending obliquely with respect to the rotational axis 13 from the other-side width surface 22f toward the one-side width surface 21f. Line 24f. The first line 23f is a central region in the axial direction of the second divided outer ring member 12f from the one side width surface 21f so that a region on the one side wide surface 21f side from the center in the axial direction of the end portion 14f is recessed in the circumferential direction. It is a shape extending to. The second line 24f is the center in the axial direction of the second divided outer ring member 12f from the other side width surface 22f so that the region on the other side width surface 22f side of the end portion 14f protrudes in the circumferential direction from the center in the axial direction. The shape extends to the area. 19, when viewed from the outer diameter side, whereas the angle E ₂ between the line 25f and the first line 23f constituting the side width surface 21f is obtuse. Further, the angle _{E 1} between the line 26f and the second line 24f constituting the other side width surface 22f is an acute angle. When viewed from the outer diameter side, the first line 23f and the second line 24f are configured to be in the same direction, here, in parallel.

  The second split outer ring member 12f is provided between the end portion 28f on the other side width surface 22f side of the first line 23f and the end portion 29f on the one side width surface 21f side of the second line 24f in the axial direction. One engaging portion 31f extending to the outer diameter side is included. The engaging portion 31f is provided near the end portion 28f on the other side width surface 22f side of the first line 23f. The engaging portion 31f engages with the housing when the needle roller bearing is incorporated into the housing.

  The second split outer ring member 12f is provided between the end portion 28f on the other side width surface 22f side of the first line 23f and the end portion 29f on the one side width surface 21f side of the second line 24f in the axial direction. A receiving recess 42f for receiving the engaging portion 34e provided in the adjacent first divided outer ring member 12e is provided.

The configuration of the other end 15f in the circumferential direction of the second divided outer ring member 12f will be described. The outer shape of the other end 15f in the circumferential direction of the second divided outer ring member 12f is viewed from the outer diameter side. The first line 35f extending obliquely with respect to the rotational axis 13 from the one side width surface 21f located on the one side in the axial direction toward the other side width surface 22f located on the other side in the axial direction, and the other side width surface 22f and a second line 36f extending obliquely with respect to the rotation axis 13 toward the one side width surface 21f. The first line 35f has a central region in the axial direction of the second divided outer ring member 12f from the one side width surface 21f so that a region on the one side wide surface 21f side from the center in the axial direction of the end portion 15f is recessed in the circumferential direction. It is a shape extending to. The second line 36f is an axial center of the second divided outer ring member 12f from the other side width surface 22f so that a region on the other side width surface 22f side of the end portion 15f protrudes in the circumferential direction from the center in the axial direction. The shape extends to the area. 18, when viewed from the outer diameter side, whereas the angle between the line 37f and the first line 35f constituting the side width surface 21f E ₄ is an obtuse angle. Further, the angle _{E 3} between the line 38f and the second line 36f constituting the other side width surface 22f is an acute angle. When viewed from the outer diameter side, the first line 35f and the second line 36f are configured in the same direction, here, in parallel.

  Here, the second split outer ring member 12f is between the end portion 40f of the first line 35f on the other side width surface 22f side and the end portion 41f of the second line 36f on the one side width surface 21f side in the axial direction. One engaging portion 34f that is provided and extends to the outer diameter side is included. The engaging portion 34f is provided near the end portion 40f on the other side width surface 22f side of the first line 35f. The engaging portion 34f engages with the housing when the needle roller bearing is incorporated into the housing.

  The second split outer ring member 12f is provided between the end portion 40f on the other side width surface 22f side of the first line 35f and the end portion 41f on the one side width surface 21f side of the second line 36f in the axial direction. A receiving recess 50f for receiving the engaging portion 31e provided in the adjacent first divided outer ring member 12e is provided.

  The outer ring 11e according to another embodiment is configured by combining the first divided outer ring member 12e and the second divided outer ring member 12f.

  Next, a configuration of a needle roller bearing including an outer ring 11e according to still another embodiment and a rotary shaft support structure including the needle roller bearing will be described. 22 and 23 are cross-sectional views showing the configuration of a needle roller bearing including an outer ring 11e according to still another embodiment, and a rotary shaft support structure including the needle roller bearing. FIG. 22 shows a state in which the constituent members are disassembled, and FIG. 23 shows a state in which the constituent members are combined. 22 and 23 are cross-sectional views cut along a plane extending in a direction perpendicular to the rotation axis 13 of the rotation shaft supported by the needle roller bearing. That is, the rotating shaft supported by the needle roller bearing is configured to extend in the front and back direction of the paper. 22 corresponds to the diagram shown in FIG. 7, and FIG. 23 corresponds to the diagram shown in FIG.

  The configuration of the needle roller bearing 44e will be described with reference to FIGS. The needle roller bearing 44e rotatably supports the rotating shaft 45 disposed on the inner diameter side. The needle roller bearing 44e includes the outer ring 11e configured as described above, and a plurality of needle rollers 19 that roll on the raceway surface located on the inner diameter surfaces 16e and 16f of the outer ring 11e and the outer diameter surface 46 of the rotary shaft 45. And a retainer 47a for holding a plurality of needle rollers 19.

  Next, the configuration of the rotating shaft support structure will be described. The rotating shaft support structure 51e includes the needle roller bearing 44e having the above-described configuration, a rotating shaft 45 that is rotatably supported by the needle roller bearing 44e, and a housing 52e. The rotation shaft 45 extends in the front and back direction of the paper. The housing 52e includes a housing upper part 53e located on the upper side and a housing lower part 54e located on the lower side.

  The housing upper portion 53e includes an arc portion 56e provided with an arc surface 55e that contacts the outer diameter surface of the outer ring 11e, and a pair of flat portions 57e and 58e extending outward from both ends of the arc portion 56e. . The arc portion 56e and the flat portions 57e and 58e have a predetermined thickness. The flat portions 57e and 58e are respectively provided with bolt holes 59e and 60e for fastening the housing upper portion 53e and the housing lower portion 54e with bolts. Bolt holes 59e and 60e are provided so as to pass straight through the flat portions 57e and 58e in the thickness direction. Of the flat portions 57e and 58e, the surface located on the housing lower portion 54e side, that is, in FIG. Surfaces located on the lower side of the drawing are flat surfaces 61e and 62e.

  Here, the housing upper portion 53e is provided with a first engagement hole 63e having a shape for receiving the engagement portion 31e provided in the first divided outer ring member 12e. The first engagement hole 63e is provided so as to be recessed outward from the surface 61e and the circular arc surface 55e located on the lower side of the one flat portion 57e. The housing upper portion 53e is provided with a first engagement hole 84e having a shape for receiving the engagement portion 34e provided in the first divided outer ring member 12e. The first engagement hole 84e is provided so as to be recessed outward from the surface 62e and the circular arc surface 55e located on the lower side of the other flat portion 58e.

  The housing lower portion 54e includes a block-shaped base 65e provided with an arcuate surface 64e that is in contact with the outer diameter surface of the outer ring 11e. Of the base 65e, the surface located on the housing upper portion 53e side excluding the arc surface 64e, that is, the surface located on the upper side of the paper in FIG. 22 is flat surfaces 66e and 67e. On the flat surfaces 66e and 67e, when the housing upper portion 53e and the housing lower portion 54e are combined, bolt holes 68e and 69e into which bolts can be screwed are provided in regions corresponding to the bolt holes 59e and 60e. .

  The housing lower portion 54e is provided with a second engagement hole 70e having a shape for receiving the engagement portion 31f provided in the second divided outer ring member 12f. The second engagement hole 70e is provided so as to be recessed outward from the surface 67e and the arc surface 64e located on the upper side of the base 65e. The first and second engagement holes 63e and 70e are provided at positions that face each other by 180 °. The housing lower portion 54e is provided with a second engagement hole 84f having a shape for receiving the engagement portion 34f provided in the second divided outer ring member 12f. The second engagement hole 84f is provided so as to be recessed outward from the surface 66e and the arc surface 64e located on the upper side of the base 65e. The first and second engagement holes 84e and 84f are provided at positions facing each other by 180 °.

  The rotating shaft support structure 51e is configured by incorporating a needle roller bearing 44e so as to support the rotating shaft 45 in a space formed between the housing upper portion 53e and the housing lower portion 54e. The housing upper portion 53e and the housing lower portion 54e are fastened and fixed by bolts 71a and 72a using bolt holes 59e, 60e, 68e and 69e. Specifically, the bolts 71a and 72a are inserted through the bolt holes 59e and 60e, respectively, and screwed into the bolt holes 68e and 69e. In this case, the surfaces 61e and 62e of the housing upper portion 53e come into contact with the surfaces 66e and 67e of the housing lower portion 54e, respectively. Further, the arc surface 55e of the housing upper portion 53e abuts on the outer diameter surface 17e of the first divided outer ring member 12e constituting the outer ring 11e, and the arc surface 64e of the housing lower portion 54e is a second divided portion constituting the outer ring 11e. The outer ring member 12f comes into contact with the outer diameter surface 17f.

  Here, the needle roller bearing 44e engages the engaging portion 31e provided in the first divided outer ring member 12e with the first engaging hole 63e provided in the housing upper portion 53e, and thereby the first divided outer ring member 12e. The engaging portion 34e provided in the outer ring member 12e is engaged with the first engaging hole 84e provided in the housing upper portion 53e, and the engaging portion 31f provided in the second divided outer ring member 12f is replaced with the housing. The engaging portion 34f provided in the second split outer ring member 12f is engaged with the second engaging hole 84f provided in the housing lower portion 54e by engaging with the second engaging hole 70e provided in the lower portion 54e. It is engaged and incorporated in the housing 52e. In this way, the rotating shaft support structure 51e is configured.

According to such a configuration, the outer shape of the circumferential end 14e that abuts the second divided outer ring member 12f adjacent in the circumferential direction in the first divided outer ring member 12e is viewed from the radial direction. Further, a first line 23e extending obliquely with respect to the rotation axis 13 of the needle roller bearing 44e from the one side width surface 21e toward the other side width surface 22e, and a needle from the other side width surface 22e toward the one side width surface 21e And the second line 24e extending obliquely with respect to the rotation axis 13 of the tapered roller bearing 44e, and is configured to mesh with the circumferential end 15f of the second divided outer ring member 12f adjacent in the circumferential direction. The first line 23e and the second line 24e extending in an inclined manner are properly meshed and the axial movement of the adjacent first and second divided outer ring members 12e and 12f is restricted. That is, the movement direction or to the opposite direction shown by arrow A ₂ in FIGS. 18 and 19 is restricted. In this case, since the first line 23e and the second line 24e are configured to be inclined and extend with respect to the rotation axis 13 of the needle roller bearing 44e, the first and second divided outer rings adjacent to each other. In the abutting regions of the members 12e and 12f, the possibility that the needle roller 19 and the portion that abuts may be in line contact can be reduced, and the needle roller 19 can be smoothly rolled. Further, one engagement portion 31e provided in the first split outer ring member 12e is engaged with the housing 52e, specifically, the first engagement hole 63e provided in the housing upper portion 53e, and the second One engaging portion 31f provided in the divided outer ring member 12f is engaged with the housing 52e, specifically, the second engaging hole 70e provided in the housing lower portion 54e, so that the first and second divided portions are engaged. Since rotation of the outer ring members 12e and 12f can be prevented, in the first and second divided outer ring members 12e and 12f incorporated in two, the first and second divided outer ring members 12e and 12f are moved in the circumferential direction. Can be regulated. In this case, with respect to the first split outer ring member 12e, only one engaging portion 31e is provided at the one end portion 14e, and one engaging portion 34e is provided at the other end portion 15e. It is only necessary to provide the second divided outer ring member 12f, and it is only necessary to provide one engaging portion 31f at the end portion 14f on one side, and the engaging portion 34f at the end portion 15f on the other side. Only one is required. In addition, since it is only necessary to provide the first engagement holes 63e and 84e and the second engagement holes 70e and 84f corresponding to the respective engagement portions 31a, 34e, 31f, and 34f, an inexpensive configuration is provided. can do. Therefore, the productivity is good, and the first and second divided outer ring members 12e and 12f can be appropriately positioned when assembled in the housing 52e.

  In this case, since the engaging portions 31e, 34e, 31f, and 34f are formed to be bent toward the outer diameter side, the joint portions with the raceway surfaces of the needle rollers 19 located on the inner diameter surfaces 16e and 16f side are formed. A smooth curved surface shape can be obtained. If it does so, rolling of the needle roller 19 can be made smooth, and vibration and noise can be reduced.

  In addition, you may decide to employ | adopt the form of the housing 52b shown above in FIG. 9 and FIG. 10 using this needle roller bearing 11e. 24 and 25 are cross-sectional views showing the rotating shaft support structure in this case. FIG. 24 shows a state in which the constituent members are disassembled, and FIG. 25 shows a state in which the constituent members are combined. 24 and 25 correspond to the cross sections shown in FIGS. 9 and 10, respectively. In addition, about the same structural member as the structural member shown in FIG.9, FIG10 etc., the same code | symbol is attached | subjected and those description is abbreviate | omitted.

  24 and 25, a rotating shaft support structure 51g according to still another embodiment of the present invention is rotatably supported by the needle roller bearing 44e having the above-described configuration and the needle roller bearing 44e. The rotating shaft 45 and the housing 52b are included. The housing 52b includes an upper housing portion 53b located on the upper side and a lower housing portion 54b located on the lower side.

  The housing upper portion 53b includes an arc portion 56b provided with an arc surface 55b that contacts the outer diameter surface of the outer ring 11e, and a pair of flat portions 57b and 58b extending outward from both ends of the arc portion 56b. . The arc portion 56b and the flat portions 57b and 58b have a predetermined thickness. The flat portions 57b and 58b are respectively provided with bolt holes 59b and 60b for fastening the housing upper portion 53b and the housing lower portion 54b with bolts. The bolt holes 59b and 60b are provided so as to pass straight through the flat portions 57b and 58b in the thickness direction. Of the flat portions 57b and 58b, the surface located on the housing lower portion 54b side, that is, in FIG. Surfaces located on the lower side of the drawing are flat surfaces 61b and 62b.

The housing upper portion 53b is provided with a first engagement hole 63b configured to receive an engagement portion 31e provided in the first divided outer ring member 12e and an engagement portion 34f provided in the second divided outer ring member 12f. It has been. The first engagement hole 63b is provided so as to dent a part of the arc surface 55b outward. In the cross section shown in FIG. 24, an angle C ₁ between the surface 73b and the surface 61b located closest to the surface 61b side of the wall surface constituting the first engaging hole 63b is shown at an acute angle.

  The housing lower part 54b includes a block-like base 65b provided with an arcuate surface 64b in contact with the outer diameter surface of the outer ring 11e. Of the base 65b, the surface located on the housing upper portion 53b side excluding the circular arc surface 64b, that is, the surface located on the upper side in FIG. 24 is a flat surface 66b, 67b. On the flat surfaces 66b and 67b, when the housing upper portion 53b and the housing lower portion 54b are combined, bolt holes 68b and 69b into which bolts can be screwed are provided in regions corresponding to the bolt holes 59b and 60b. .

The housing lower part 54b is provided with a lubricating oil passage 74b for supplying lubricating oil to the needle roller bearing 44e. The lubricating oil passage 74b extends upward from the lower region of the base 65b, and further bends toward the arc surface 64b to have an opening hole 75b in a part of the arc surface 64b. The opening hole 75b does not face the surface 67b of the housing lower part 54b, and is provided so that a part of the arc surface 64b is recessed outward. In the cross section shown in FIG. 24, the angle C ₂ between the surface 76b and the surface 67b located closest to the surface 67b side of the wall surface constituting the opening hole 75b is shown at an acute angle. The first engagement hole 63b and the opening hole 75b are provided at positions facing each other by 180 °. The lubricating oil can be passed from the opening hole 75b to the needle roller bearing 44a via the lubricating oil passage 74b.

  Here, the opening hole 75b is configured to receive an engagement portion 34e provided in the first divided outer ring member 12e and an engagement portion 31f provided in the second divided outer ring member 12f. That is, the opening hole 75b has a configuration that also serves as the functions of the second engaging portions 70e and 84e in the embodiment shown in FIG.

This will be described as follows. Figure 26 is an enlarged view seen from the direction of an aperture hole 75b by an arrow _{D 1} of the in FIGS. 24 and 25. Referring to FIG. 26, when the first divided outer ring member 12e and the second divided outer ring member 12f abut each other, the engagement portion 31f and the receiving recess 50e are engaged between the circumferential direction and the axial direction, and the engagement. A minute gap 77g is formed between the circumferential direction and the axial direction of the portion 34e and the receiving recess 42f. Through this gap 77g, the lubricating oil supplied from the base 65b side using the lubricating oil passage 74b is supplied into the needle roller bearing 44e.

  The rotating shaft support structure 51g is configured by incorporating a needle roller bearing 44e so as to support the rotating shaft 45 in a space formed between the housing upper portion 53b and the housing lower portion 54b. The housing upper portion 53b and the housing lower portion 54b are fastened and fixed by bolts 71a and 72a using bolt holes 59b, 60b, 68b and 69b. In this case, the surfaces 61b and 62b of the housing upper portion 53b come into contact with the surfaces 66b and 67b of the housing lower portion 54b, respectively. Further, the arc surface 55b of the housing upper portion 53b abuts on a part of the outer diameter surface 17e of the first divided outer ring member 12e constituting the outer ring 11a and a part of the outer diameter surface 17f of the second divided outer ring member 12f. The arcuate surface 64b of the housing lower part 54b is in contact with a part of the outer diameter surface 17e of the first divided outer ring member 12e constituting the outer ring 11a and a part of the outer diameter surface 17f of the second divided outer ring member 12f. become.

  Here, the needle roller bearing 44e is provided with an engaging portion 31e provided on the first divided outer ring member 12e and an engaging portion 34f provided on the second divided outer ring member 12f on the housing upper portion 53b. The housing lower part 54a is provided with an engaging part 34e provided in the first divided outer ring member 12e and an engaging part 31f provided in the second divided outer ring member 12f. It is engaged with the opening hole 75b that also serves as the second engagement hole, and is assembled into the housing 52b. In this way, the rotating shaft support structure 51g is configured.

  According to such a structure, since the engaging part is engaged using the opening hole for letting lubricating oil flow, it is not necessary to newly provide an engaging hole. Accordingly, it is possible to reduce the number of further processing steps and to further reduce the cost. In this case, since the lubricating oil is supplied to the center side in the axial direction of the raceway surface, the needle roller 19 can be further smoothly rolled.

  In this case, in the circumferential direction, the divided portion of the housing 52b, that is, the portion where the housing upper portion 53b and the housing lower portion 54b are in contact with the abutting portions of the first and second divided outer ring members 12e and 12f are shifted in the circumferential direction. be able to. Then, the roundness of the outer ring 11e constituted by the first and second divided outer ring members 12e and 12f can be made higher by appropriately fitting the abutting portions along the arc surfaces of the housing upper part 53b and the housing lower part 54b. it can. Therefore, further smooth rolling of the needle roller 19 can be achieved.

  Note that the outer ring shown in FIG. 17 and the integrated cage shown in FIGS. 14 and 15 may be used. FIG. 27 is a cross-sectional view of the rotating shaft support structure including the needle roller bearing in this case, and corresponds to FIG.

  Referring to FIG. 27, a rotating shaft support structure 51h according to still another embodiment of the present invention includes first and second divided outer ring members 12e and 12f having a configuration described above, a plurality of needle rollers 19, and The needle roller bearing 44h including the cage 47d shown in FIGS. 14 and 15 described above, a rotating shaft 45 rotatably supported by the needle roller bearing 44h, and a housing 52e are included. The housing 52e includes an upper housing portion 53e located on the upper side and a lower housing portion 54e located on the lower side. About each structural member, since it is the same as that of the case shown in the above-mentioned figure, those description is abbreviate | omitted. You may comprise in this way.

  As mentioned above, according to such an outer ring, a needle roller bearing, and a rotating shaft support structure, productivity is favorable and the division | segmentation outer ring member can be appropriately positioned when it is incorporated in a housing.

  In the above embodiment, needle rollers are used as the rollers. However, the present invention is not limited to this, and other rollers such as rod rollers may be used.

  Further, in the above embodiment, the engaging portion is configured to be formed by bending the protruding portion protruding in the circumferential direction of the divided outer ring member toward the outer diameter side. As another member, the engaging portion may be attached to the outer diameter surface of the circumferential end portion of the divided outer ring member. Further, smoothness may be improved by polishing or the like at the joint with the inner diameter surface.

  In the above-described embodiment, the outer ring is configured by combining a pair of split outer rings each having a substantially semi-cylindrical shape. However, the present invention is not limited thereto, and the cylindrical member is formed at any two locations in the circumferential direction. The outer ring may be configured by combining three or more of the divided outer ring members having a shape cut in FIG.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  According to the present invention, the productivity is good, and it is effectively used when the proper positioning of the split outer ring member is required when it is incorporated in the housing.

  11a, 11e outer ring, 12a, 12b, 12c, 12d, 12e, 12f split outer ring member, 13 rotation axis, 14a, 14b, 14c, 14e, 14f, 15a, 15b, 15e, 15f, 28a, 28b, 28c, 28e, 28f, 29a, 29b, 29e, 29f, 32a, 32c, 32e, 40a, 40b, 40e, 40f, 41a, 41b, 41e, 41f, 83c, 83d end, 16a, 16b, 16c, 16e, 16f 17a, 17b, 17c, 17e, 17f, 46 Outer surface, 18a, 18b, 18e, 18f, 80c, 80d Through hole, 19 Needle rollers, 21a, 21b, 21e, 21f, 22a, 22b, 22e, 22f, 79c wide surface, 23a, 23b, 23c, 23e, 23f, 24a, 24b, 24c, 2 e, 24f, 25a, 25b, 25e, 25f, 26a, 26b, 26e, 26f, 35a, 35b, 35e, 35f, 36a, 36b, 36e, 36f, 37a, 37b, 37e, 37f, 38a, 38b, 38e, 38f line, 27a, 27c convex part, 31a, 31b, 31c, 31d, 31e, 31f, 34e, 34f engaging part, 33a, 33c protruding part, 39a, 39b concave part, 42a, 42b, 42e, 42f, 50e, 50f Receiving recess, 44a, 44c, 44d, 44e, 44h Needle roller bearing, 45 rotary shaft, 47a, 47d cage, 48a, 49a Split cage member, 51a, 51b, 51c, 51d, 51e, 51g, 51h Rotary shaft Support structure, 52a, 52b, 52e Housing, 53a, 53b, 53c, 53e Housing upper part, 54a, 54b, 54c, 54e Housing lower part, 55a, 55b, 55c, 55e, 64a, 64b, 64e Arc surface, 56a, 56b, 56e Arc part, 57a, 57b, 57c, 57e, 58a, 58b, 58e Flat part, 59a, 59b, 59c, 59e, 60a, 60b, 60c, 60e, 68a, 68b, 68c, 68e, 69a, 69b, 69c, 69e Bolt hole, 61a, 61b, 61c, 61e, 62a, 62b, 62c 62e, 66a, 66b, 66c, 66e, 67a, 67b, 67c, 67e, 73b, 76b, 81c, 81d, 82c, 82d surface, 63a, 63b, 63e, 70a, 70e, 84e, 84f engagement hole, 65a , 65b, 65e Base, 71a, 72a Bolt, 74b Aburadoriaburaro, 75b opening hole, 77b, 77 g gap, 78c portion.

Claims (10)

An outer ring provided in a roller bearing and formed by incorporating a plurality of divided outer ring members from the outer diameter side,
Of the divided outer ring members, the outer shape of the circumferential end that abuts the circumferentially adjacent divided outer ring member is, when viewed from the radial direction, from one side width surface toward the other side width surface of the roller bearing. A first line extending obliquely with respect to the rotation axis, and a second line extending obliquely with respect to the rotation axis of the roller bearing from the other side width surface toward the one side width surface; It is a shape that meshes with the circumferential end of the adjacent split outer ring member,
The split outer ring member is provided between an end portion of the first line on the other side width surface side and an end portion of the second line on the one side width surface side, and extends toward the outer diameter side. An outer ring including one engaging portion that engages with the housing when the roller bearing is incorporated into the housing. When viewed from the radial direction, the outer shape of the end portion on one side in the circumferential direction that collides with the divided outer ring member adjacent in the circumferential direction is a shape in which the center in the axial direction protrudes in the circumferential direction, and the end on the other side The outer ring according to claim 1, wherein the shape of the portion is a shape in which the center in the axial direction is recessed in the circumferential direction. The outer ring according to claim 1, wherein the first line and the second line are inclined in the same direction. The outer ring according to any one of claims 1 to 3, wherein the engaging portion is formed by bending a protruding portion protruding in a circumferential direction of the divided outer ring member toward an outer diameter side. The outer ring according to any one of claims 1 to 4, wherein a receiving recessed portion that receives the engaging portion is provided in a portion of the divided outer ring member that faces the engaging portion of an adjacent divided outer ring member. . The outer ring according to any one of claims 1 to 5, wherein the engaging portion is provided at an axial center. A roller bearing comprising the outer ring according to claim 1, a plurality of rollers, and a cage that holds the plurality of rollers and can be assembled from a radial direction. A roller bearing according to claim 7;
A rotating shaft rotatably supported by the roller bearing;
An upper portion of the housing and a lower portion of the housing, wherein the roller bearing can be incorporated between the upper portion of the housing and the lower portion of the housing, and the engaging portion is engaged with at least one of the upper portion of the housing and the lower portion of the housing. A rotating shaft support structure including a housing provided with a mating engagement hole. The rotating shaft support structure according to claim 8, wherein the engagement hole includes an oil passage port through which lubricating oil is passed. The rotating shaft according to claim 8 or 9, wherein the housing upper part and the housing lower part are fastened with bolts, and the engaging part is provided with a through hole through which a shaft part of the bolt can be inserted. Support structure.

Images