JPS648207B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roller bearing with a cage in which the cage is a pressed cage.

Conventionally, in this type of roller bearing, as shown in FIG. 1, for example, the cage 4a includes side portions 43a, 43a bent in the radial direction from both ends of an annular portion 42a that holds the rollers 3a. , the side surface portion 43
a, 43a from the anti-annular side (inner circumferential side) to the claw portion 45
A and 45a protrude between adjacent rollers to prevent the rollers from falling off, and as disclosed in Japanese Patent Publication No. 48-26093, there are recesses in the center of both end faces of the rollers, It is known that the pocket of the retainer has a convex portion on the edge facing the end surface of the roller, and the roller is held by the engagement between the concave portion of the roller and the convex portion of the edge of the pocket. There is.

However, the former, as shown in Figure 2,
In order to reduce the amount of roller fall, the claw portion 45a,
45a and the rolling surface of the roller 3a is reduced, the claw portions 45a,
The circumferential clearance c' between the roller 45a and the rolling surface of the roller 3a also becomes smaller, which causes the problem that the roller 3a and the claws 45a, 45a come into contact with each other during rotation, resulting in poor rotation and damage to the cage. Moreover, when assembling the bearing, not only the claws 45a, 45a may damage the rolling surface of the roller 3a, but also the claws cannot be bent with high precision. The drawback was that the quality of the bearings varied widely. In addition, in the latter, when the rollers are installed, the edges of the pockets with the convex portions are bent greatly toward the rollers to engage the concave portions of the rollers and the convex portions of the pockets, which creates residual stress around the pockets. This not only weakens the strength of the cage, but also makes it difficult to manufacture large-sized bearings because the shape of the pocket is not completed until the bending process is performed, which limits the precision of the cage.

The object of the present invention is to eliminate the drawbacks and problems of the conventional cage-equipped roller bearing in terms of rotational performance and bearing assembly.

Next, the roller bearing with cage of the present invention was applied to a third roller bearing with a cage.
To explain the embodiments and application examples shown in FIGS. 1 to 12, 1 is an outer ring, 2 is an inner ring, 3 is a roller having an annular groove 31 on the end face, and 4 is a plurality of pockets 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, . It is a press retainer including an annular portion 42 having...

FIG. 3 shows a first embodiment of a roller bearing with a cage according to the present invention, in which an outer ring 1 has roller guide ribs 12, 12 on both sides of an inner raceway 11, and an inner ring 2 has roller guide collars 12, 12 on both sides of an inner raceway 21. It has a roller guide collar 22 on one side,
The rollers 3 are NJ type cylindrical roller bearings which are cylindrical rollers having annular grooves 31 on both end faces. As shown in FIGS. 3 and 4, the cage 4 extends from both ends of a cylindrical annular portion 42 outside the pitch circle 5 of the roller 3 in a direction perpendicular to the annular portion 42 (radial direction). Flange portions 43, 43 extending inward continue, and peripheral edges 431, 431 on the anti-annular side (inner peripheral side) of the flange portions 43, 43 are located at positions corresponding to the end surfaces of the rollers 3. It has tongue pieces 44, 44 that protrude toward the end surface of the roller,
The tips of the tongues 44, 44 engage with the annular grooves 31, 31 on the end faces of the roller 3 to prevent the roller 3 from falling off. Further, the tongue piece 44
is formed with a size and a bending angle so that it does not come into contact with the annular groove 31 of the roller 3 during rotation of the bearing.

To assemble this bearing, first insert the retainer 4, which has one tongue piece 44 bent and the other tongue piece 44 is not bent, into the outer ring 1, and then bend it. After inserting the rollers 3 into each pocket 41 by engaging the annular groove 31 of one of the tongue pieces 44 and 3, the inner ring 2 is assembled, and the other unbent tongue piece 44 is bent. This is completed by engaging the other annular groove 31 of the roller 3.

In this first embodiment, the amount of roller fall is the fifth
As shown in the figure, the annular side surface 4 of the tongue piece 44
41 and the inner wall 32 of the annular groove 31 on the end surface of the roller. On the other hand, the tongue piece 44 is
As shown in FIG. 6, the circumferential clearance between the tongue piece 44 and the outer wall 33 of the annular groove 31 is the clearance c, c between the circumferential edges 442, 442 of the tongue piece 44 and the outer wall 33 of the annular groove 31. Therefore, the dimensions of the annular groove 31 and the tongue piece 44
By appropriately selecting the circumferential dimension and bending angle of the roller, it is possible to reduce the amount of roller drop and increase the circumferential clearance between the roller and the tongue.

FIG. 7 shows a second embodiment of the cage-equipped roller bearing of the present invention, which is a thrust cylindrical roller bearing in which the outer ring 1 and the inner ring 2 are disk-shaped with a hole in the center. The cage 4 extends from both ends (outer circumferential side and inner circumferential side) of a disc-shaped annular part 42 on a plane including the central axis of the rollers 3 in opposite right angle directions (axial direction) to the annular part 42. Extending flange parts 43, 43
continues, and has tongue pieces 44, 44 protruding from the anti-annular side peripheral edges 431, 431 of the flange parts 43, 43 toward the end surface of the roller 3, and the tongue pieces 4
The tips of the rollers 4 and 44 are connected to the annular groove 3 on the end surface of the roller 3 on opposite sides to the plane containing the central axis of the roller 3, respectively.
1 and 31 to hold the roller 3.

FIG. 8 shows a third embodiment of the roller bearing with cage according to the present invention, in which the outer ring 1 has an inner conical raceway 11.
The inner ring has an outer conical raceway 21 and a large collar 2.
2. It is a tapered roller bearing that has small flanges 23 and the rollers 3 are tapered rollers. Both end surfaces of the tapered roller 3 have annular grooves 31, 31 as in each of the above embodiments, and the cage 4 has a conical annular portion located inside the conical surface including the central axis of the tapered roller 3. 4
Flange portions 43, 43 extend outward from both ends of the annular portion 42 in a direction perpendicular to the annular portion 42, and
Tongue pieces 4 protruding from the flange portions 43, 43
4 and 44 are engaged with the annular groove 31 on the end face of the tapered roller.

FIG. 9 shows a fourth embodiment of the roller bearing with cage according to the present invention, in which the outer ring 1 has no roller guide ribs, and the inner ring 2 has roller guide ribs 22, 22 on both sides of the outer raceway 21. It is a cylindrical roller bearing. The roller 3 has an annular groove 31 only on one end surface, and the cage 4 has an annular portion 42 inside the pitch circle 5 of the roller 3, as shown in FIGS. A radially outward flange portion 43 continues only from the side end of the portion 42 corresponding to the annular groove side end surface of the roller 3, and the tongue piece 44 of the retainer protrudes from the side surface 432 of the flange portion 43, and the roller 3 is engaged with the annular groove 31 of.

Note that there is a side edge 433 on the outer peripheral edge of the flange portion 43 that prevents the roller 3 inserted into the pocket 31 from falling in the radial direction.

FIG. 11 shows an application example of the roller bearing with cage of the present invention, in which the outer ring 1, the inner ring 2, and the rollers 3 are
A NU type cylindrical roller bearing is constructed, and the cage 4 is the first
As shown in FIG. 2, there is a radially inward first tongue piece 45 on the edge of the pocket 41 corresponding to the end face of the roller 3, and the tip of the first tongue piece 45 is bent toward the end face of the roller 3. It is bent to engage an annular groove 31 on the end surface of the roller 3 to prevent the roller from falling off.

If necessary, a second tongue piece 46 facing inward in the radial direction is provided on the edge of the pocket 44 opposite to the edge where the first tongue piece 45 is located, so as to restrict the fall of the roller 3 in the radial direction. It's getting old.

Further, as an application example of the roller bearing with a cage of the present invention, for example, the raceway ring and rollers are the same as those in each of the above embodiments, and in particular, the cage has a considerable thickness in the radial direction like a general machined cage. a plurality of pockets arranged at appropriate intervals in the circumferential direction of an annular body having a width dimension longer than the length of the roller in the axial direction; It is also possible to implement the roller bearing with a cage, which is made of synthetic resin and has a protrusion toward the end face, and the protrusion engages with an annular groove on the end face of the roller to prevent the roller from falling off.

As described above, the roller bearing with a cage of the present invention has an annular groove on the end face of the roller, and the cage has an annular groove on the end face of the roller of the annular portion having a plurality of pockets for holding the roller. A flange portion continues from the corresponding side end, and the flange portion has a tongue piece facing the end face of the roller at a position corresponding to the end face of the roller, and the tongue piece engages with an annular groove on the end face of the roller. Since the rollers are designed to prevent the rollers from falling off, the amount of roller fall is small and the assembly of the bearing is easy.In addition, the rollers do not come into contact with the retainer during rotation at any part other than the pocket, causing rotational failure. The cage will not be damaged, and the rolling surfaces of the rollers will not be damaged when the bearing is assembled into the device. Furthermore, since the edge of the pocket of the cage is not deformed when assembling the bearing, the guiding precision of the rollers is not deteriorated and residual stress is not generated around the pocket of the cage.

In the embodiments, bearings having both inner and outer bearing rings have been described, but bearings without either one of the bearing rings may be used, or a cage and roller without both bearing rings may be used. Further, even if the cage has a flange portion on only one side, the annular grooves of the rollers may be formed on both end faces of the rollers. In addition, the shapes of the rollers and the annular grooves on their end faces, the shapes of the tongues of the retainer, etc. are not limited to the embodiments, and may be modified as appropriate within the scope of the claims.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of a conventional roller bearing with cage, FIG. 2 is an explanatory view showing the contact state between the rollers of the bearing shown in FIG. 1 and the pawls, and FIG. 4 is a partial perspective view of only the cage of the bearing shown in FIG. 3, and FIGS. 5 and 6 are views of the bearing shown in FIG. 3. Explanatory diagrams showing the relationship between rollers and cages, FIG. 7, FIG. 8, and FIG. 9 respectively show a second embodiment, a third embodiment, and a fourth embodiment of a roller bearing with a cage according to the present invention. 10 is a partial perspective view of only the retainer of the bearing shown in FIG.
FIG. 1 is a longitudinal sectional side view showing an application example of the roller bearing with a cage of the present invention, and FIG. 12 is a partial perspective view of only the cage of the bearing shown in FIG. 11. In the drawings, 1 is an outer ring, 2 is an inner ring, 3 is a roller, 31 is an annular groove, 4 is a retainer, 41 is a pocket, 42 is an annular portion, 43 is a flange portion, 431 is a periphery, 432 is a side surface, 44 is a tongue piece.

Claims (1)

[Claims] 1. In a roller bearing with a cage in which the cage is a press cage, the rollers held by the cage are:
The retainer has an annular groove on at least one end surface, and the retainer extends in a direction perpendicular to the annular portion from a side end corresponding to the annular groove side end surface of the annular portion of the annular portion having a plurality of pockets for holding the rollers. An extending flange portion continues, and the flange portion has a tongue piece facing the annular groove side end face of the roller at a position corresponding to the annular groove side end face of the roller, and the tongue piece faces the annular groove side end face of the roller. A roller bearing with a cage engaged with the cage to prevent the rollers from falling off. 2. The roller bearing with a cage according to claim 1, wherein the tongue piece provided on the flange portion of the cage protrudes from the periphery of the flange portion on the side opposite to the annular portion. 3. The roller bearing with a cage according to claim 1, wherein the tongue piece provided on the flange of the cage protrudes from a side surface of the flange.