JP6587141B2 - Bump stopper - Google Patents

Description

  The present invention relates to a bump stopper that prevents a vehicle body side and an axle side from coming into contact with each other and cushions a vertical motion impact caused by vibration input during vehicle travel.

  Patent Document 1 describes a structure in which a bump rubber is baked and fixed on a flat plate to produce a stopper member, and this stopper member is attached to a lower surface of a bracket attached to a chassis frame with a bolt. The bracket is composed of an L-shaped member attached to the side rail with a bolt or the like, and a groove-shaped member fixed to the L-shaped member by welding or the like. The reinforcing partition is fixed by welding or the like. Further, a groove member is formed of a channel material having a U-shaped cross section, and four flat walking partitions are fixedly arranged side by side inside the U-shaped cross section.

Japanese Utility Model Publication No. 6-0667266

  In the bump rubber stopper of Patent Document 1, since a plurality of flat reinforcing partitions are arranged inside the U-shaped cross section of the groove member and each reinforcing partition is welded to the groove member, manufacturing is complicated. Moreover, the rigidity of the bracket with respect to the load input in the vertical direction may be reduced due to an error in the welding position of the reinforcing partition and an error in the angle with respect to the groove member.

  Therefore, an object of the present invention is to provide a bump stopper that can be easily manufactured and can secure a desired rigidity.

  In order to solve the above-described problems, the present invention provides an opposed surface on the axle side fixedly provided on the axle supporting the wheel and an opposed surface on the axle side fixedly provided on the vehicle body side from above or below. A bump stopper interposed between a vehicle body side facing surface and a bump rubber bracket and a bump rubber.

  The bump rubber bracket includes an attachment member, a rubber fixing member, and a pair of intermediate members. The mounting member is fixed in a state of surface contact with one of two opposing surfaces (an axle-side opposing surface and an axle-side opposing surface). The pair of intermediate members have the same shape, and are fixed to the mounting member and the rubber fixing member while being sandwiched between the mounting member and the rubber fixing member. In the stopper mounting state in which the mounting member is fixed to one of the two opposing surfaces, the pair of intermediate members has a closed cross section substantially perpendicular to the vertical direction along the vertical direction between the mounting member and the rubber fixing member. To form.

  The bump rubber is fixed to the rubber fixing member so as to face the other of the two facing surfaces from above or below in the stopper mounting state.

  In the above configuration, when the axle side largely moves up and down with respect to the vehicle body side due to vibration input during vehicle travel, the bump rubber of the bump stopper fixed to one opposing surface comes into contact with the other opposing surface from the vertical direction. The vehicle body side and the axle side can be reliably prevented from contacting each other, and the vehicle body side and the axle side can be buffered by the bump rubber.

  In addition, the pair of intermediate members are fixed to the mounting member and the rubber fixing member while being sandwiched between the mounting member and the rubber fixing member, and the closed cross section substantially orthogonal to the vertical direction is fixed to the mounting member and the rubber in the stopper mounting state. Since it is uniformly formed along the vertical direction between the members, the rigidity of the bump stopper with respect to the load input in the vertical direction can be ensured.

  Further, when forming the closed cross section, the bump rubber bracket can be easily manufactured because the pair of intermediate members may be combined and fixed in a state where the closed cross section is formed. Further, since the pair of intermediate members have the same shape, the necessary types of intermediate members can be unified.

  Moreover, since the closed cross section is formed by combining a pair of intermediate members, the size of the closed cross section is changed by adjusting the relative positions of the pair of intermediate members as appropriate and fixing them to the mounting member and the rubber fixing member. The For this reason, a desired rigidity can be ensured by setting a closed section corresponding to the rigidity without changing the member.

  According to the present invention, desired rigidity can be ensured by a bump stopper that can be easily manufactured.

It is the side view which looked at the suspension device of vehicles equipped with the bump stopper concerning one embodiment of the present invention from the cross direction outside. It is the side view which looked at the bump stopper of FIG. 1 from the vehicle width direction outer side. It is the perspective view which looked at the bump stopper of FIG. 2 from diagonally upper back. FIG. 4 is a cross-sectional view taken along arrow IV-IV in FIG. 2.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow IN indicates the inner side of the vehicle width. In the following description, the front-rear direction means the front-rear direction of the vehicle, and the left-right direction means the left-right direction in a state where it faces the front of the vehicle. Since the bump stoppers 5 are similarly provided on the left and right sides of the vehicle, the left side structure will be described below, and the illustration and description of the right side structure will be omitted.

  As shown in FIG. 1, a vehicle including a bump stopper 5 according to the present invention includes a vehicle body frame 1, a rear axle (axle) 2, and a leaf suspension 3.

  The vehicle body frame 1 is connected to a pair of left and right side frames 4 (only the left side is shown in FIGS. 1 to 3) extending in the front-rear direction on both sides in the vehicle width direction and the left and right side frames 4 extending in the vehicle width direction. A plurality of cross frames (not shown). The side frame 4 has a U-shaped cross section that opens inward in the vehicle width direction, and is a vertical plate portion 41 that stands in the vertical direction and extends in the front-rear direction, and is bent upward from the upper edge of the vertical plate portion 41 in the vehicle width direction. The plate portion 42 and a lower plate portion 43 that are bent inward in the vehicle width direction from the lower edge of the vertical plate portion 41 and face the upper plate portion 42 are integrally provided. The rear axle 2 extends in the vehicle width direction below the side frame 4 and elastically supports the side frame 4 via the leaf suspension 3. Left and right rear tires (wheels) 40 (only the left side is shown in FIG. 1) are supported at both ends of the rear axle 2 in the vehicle width direction.

  The leaf suspension 3 is interposed between the side frame 4 and the rear axle 2, and includes a suspension spacer 11, a leaf spring 12, a crank plate 13, and front and rear U bolts 14F and 14R. The suspension spacer 11 has a plate shape and is placed on the rear axle 2 from above. The leaf spring 12 has a structure in which a plurality of long leaf springs having different lengths are stacked one above the other, and extends in the front-rear direction below the lower surface 4 a of the side frame with a space from the side frame 4. . The front end portion and the rear end portions 12a and 12b of the leaf spring are respectively supported by the side frames 4 so as to be rotatable about a rotation axis extending in the vehicle width direction, and the central portion 12c of the leaf spring is configured to support the plate-like suspension spacer 11. Through the rear axle 2 from above.

  The crank plate 13 has a flat plate shape, and is formed with a pair of front and rear bolt-tolerant recesses 19F and 19R that extend transversely across the upper surface of the plate and is placed on the center portion 12c of the leaf spring from above. .

  Each of the U bolts 14F and 14R is a pair of front and rear, and integrally includes a U-shaped portion 15 that bends or curves in an inverted U shape and a linear portion 16 that linearly extends downward from both ends of the U-shaped portion 15. A male screw is formed at the lower end of the straight portion 16. The rear axle 2 is formed with front left and right bolt insertion holes 17F and rear left and right bolt insertion holes 17R.

  U-bolt 14F so that U-shaped portion 15 of front U-bolt 14F is housed in front-side bolt housing recess 19F and U-shaped portion 15 of rear-side U-bolt 14F is housed in rear-side bolt housing recess 19R. , 14R straddling the crank plate 13, the straight portions 16 of the U bolts 14F, 14R extend downward on both sides (left and right sides) of the leaf spring 12 in the width direction. The lower end portions of the left and right straight portions 16 of the front U-bolt 14F are respectively inserted through the front left and right bolt insertion holes 17F of the rear axle 2 and protrude downward from the rear axle 2, and nuts 18 are projected to the lower end portion from below. Screwed and tightened. The lower ends of the left and right straight portions 16 of the rear U-bolt 14R are inserted through the left and right insertion holes 17R on the rear side of the rear axle 2 to protrude below the rear axle 2, and the nut 18 is located below the lower end portion. And screwed together.

  As shown in FIGS. 1 to 3, the bump stopper 5 includes a bump rubber bracket 6 and a bump rubber 7, and includes an upper surface 13 a of the crank plate 13 and a lower surface 4 a of the side frame 4 (lower surface of the lower plate portion 43). Intervene in between. The upper surface 13a of the crank plate 13 forms an opposing surface on the axle side fixedly provided on the rear axle 2, and the lower surface 4a of the side frame 4 is fixedly provided on the vehicle body side and is located above the opposing surface on the axle side. The opposing surface of the vehicle body side which opposes from is formed.

  As shown in FIGS. 2 and 3, the bump rubber bracket 6 includes a mounting member 20, a bump rubber spacer 21, and a rubber side member 29.

  The attachment member 20 is a metal plate material that integrally includes front and rear attachment plate portions 30F and 30R and a fixing plate portion 31. The upper surface 31 a of the fixing plate portion 31 is in surface contact with the lower surface 4 a of the side frame 4, and the front mounting plate portion 30 </ b> F bends upward at a substantially right angle from the upper end edge on the front end side of the fixing plate portion 31. The rear mounting plate portion 30R bends upward at a substantially right angle from the upper end edge on the rear end side of the fixing plate portion 31. The outer mounting plate portion 30R extends along the outer side surface (the outer surface of the vertical plate portion 41) 4b. Extending along the outer surface 4 b of the side frame 4.

  The bump rubber spacer 21 integrally includes a pair (two) of intermediate members 26 and 27 (see FIG. 4) and a spacer plate portion 23, and is provided between the lower surface 4 a of the side frame 4 and the bump rubber 7. The lower end position of the bump rubber 7 with respect to the lower surface 4a of the side frame 4 (the distance in the vertical direction of both) is set to a predetermined position (predetermined distance). The upper edge portions of the intermediate members 26 and 27 are fixed to the lower surface 31b of the intermediate portion (between the front and rear mounting plate portions 30F and 30R) of the mounting member 20 by welding 28. The lower end edge is fixed to the upper surface 23a of the flat spacer plate 23 by welding 28, and the attachment member 20 and the bump rubber spacer 21 are integrated. The spacer plate portion 23 constitutes a part of a rubber fixing member 22 described later. Details of the intermediate members 26 and 27 will be described later.

  Mounting bolt insertion holes 33F and 33R into which bolt shafts of a pair of front and rear mounting bolts 32F and 32R can be inserted are formed in the front and rear mounting plate portions 30F and 30R of the mounting member 20, and the vertical plate portion 41 of the side frame 4 is formed. A through hole (not shown) through which the bolt shaft of the mounting bolts 32F, 32R can be inserted is formed. The mounting plate portion 30 is mounted in a state where the fixing plate portion 31 is in surface contact with the lower surface 4a of the side frame 4 from below and the mounting plate portions 30F and 30R are in surface contact with the outer side surface 4b of the side frame 4 from the outside in the vehicle width direction. By inserting the mounting bolts 32F, 32R into the bolt insertion holes 33F, 33R and the insertion holes of the vertical plate portion 41 of the side frame 4, and screwing and fastening nuts (not shown) to the mounting bolts 32F, 32R, The attachment member 20 and the bump rubber spacer 21 are fixed to the side frame 4.

  The rubber side member 29 integrally includes a rubber fixing plate portion 24 and a rubber mounting portion 25, and the rubber side member 29 and the spacer plate portion 23 constitute a rubber fixing member 22.

  The rubber fixing plate portion 24 has a flat plate shape, and overlaps the spacer plate portion 23 from below in a state where the upper surface 24a is in surface contact with the lower surface 23b of the spacer plate portion 23. At the front end portion and the rear end portion of the spacer plate portion 23, bracket-side coupling bolt insertion holes 34F, 34R into which the bolt shafts of the pair of front and rear coupling bolts 36F, 36R can be inserted are formed. Rubber-side coupling bolt insertion holes 35F and 35R into which the bolt shafts of the front and rear coupling bolts 36F and 36R can be inserted are formed at the front end portion and the rear end portion of the rubber fixing plate portion 24. The upper surface 24a of the rubber fixing plate portion 24 is overlapped with the lower surface 23b of the spacer plate portion 23, the coupling bolt insertion holes 34F and 34R on the bracket side and the coupling bolt insertion holes 35F and 35R on the rubber side are respectively aligned, and the bolt insertion holes on the front side 34F and 35F are inserted through the bolt shafts of the front coupling bolts 36F, the rear bolt insertion holes 34R and 35R are inserted through the bolt shafts of the rear coupling bolts 36R, and the coupling nuts 37F and 36R are coupled to the coupling nuts 37F and 36R. The rubber fixing plate portion 24 is fixed to the spacer plate portion 23 by screwing and fastening 37R.

  The rubber mounting portion 25 has a U cross section that forms a rubber fixing recess 25a. The rubber mounting portion 25 is disposed between the front and rear coupling bolt insertion holes 35F and 35R so that the rubber fixing recess 25a is opened downward. It is fixed to the lower surface 24b of the steel plate by welding or the like.

  The bump rubber 7 is an elastic material such as a bowl-shaped rubber, and is accommodated and fixed in the rubber fixing recess 25a. For fixing the bump rubber 7, sticking or adhesion with an adhesive is used. In the stopper mounting state where the mounting member 20 and the bump rubber spacer 21 are fixed to the side frame 4 and the rubber side member 29 is fixed to the spacer plate portion 23, the curved lower surface 7a of the bump rubber 7 It faces the upper surface 13a from above (see FIG. 1).

  The two intermediate members (the first intermediate member 26 and the second intermediate member 27) of the bump rubber spacer 21 are channel members having the same shape and having a U-shaped cross section. As shown in FIG. 4, the first intermediate member 26 integrally includes a flat plate-like substrate portion 26a and a pair of side plate portions 26b and 26c that are bent from both ends of the substrate portion 26a and face each other. . Similarly, the second intermediate member 27 integrally includes a flat plate-like substrate portion 27a and a pair of side plate portions 27b and 27c that are bent from both end edges of the substrate portion 27a and face each other. The two intermediate members 26 and 27 are in a state in which all of the substrate portions 26a and 27a and the side plate portions 26b, 26c, 27b, and 27c are erected in the vertical direction (standing state), and the two substrate portions 26a and 27a are in contact with each other. Oppositely, the end portions of one of the side plate portions 26b and 27b overlap in the plate thickness direction, and the end portions of the other side plate portions 26c and 27c overlap in the plate thickness direction to form a closed cross section 38 inside thereof. In the state (closed section formation state), the mounting member 20 is disposed between the lower surface 31 b of the fixing plate portion 31 and the upper surface 23 a of the spacer plate portion 23. The upper edge and the lower edge of the first and second intermediate members 26, 27 (substrate portions 26a, 27a and side plate portions 26b, 26c, 27b, 27c) are the lower surface 31b of the fixing plate portion 31 and the spacer plate portion. It is fixed to the upper surface 23a of 23 by welding 28, respectively. The front end surface of one side plate portion 26 b of the first intermediate member 26 and the outer surface of one side plate portion 27 b of the second intermediate member 27 are fixed by welding 28, and the other side plate of the second intermediate member 27. The distal end surface of the portion 27 c and the outer surface of the other side plate portion 26 c of the first intermediate member 26 are fixed by welding 28. As a result, the first and second intermediate members 26 and 27 are fixed to the mounting member 20 and the rubber fixing member 22 while being sandwiched between the mounting member 20 and the rubber fixing member 22, and the intermediate members 26 and 27 The closed section 38 that is substantially orthogonal to the vertical direction in the stopper mounting state is uniformly formed between the mounting member 20 and the rubber fixing member 22 along the vertical direction.

  According to this embodiment, when the rear axle 2 largely moves up and down with respect to the side frame 4 due to vibration input during traveling of the vehicle and the clamp plate 13 approaches the side frame 4, the bump stopper 5 fixed to the side frame 4. The bump rubber 7 comes into contact with the crank plate 13 to prevent the crank plate 13 and the side frame 4 from coming into contact, and the impact at the time of contact is buffered by the elasticity of the bump rubber 7.

  Further, the pair of intermediate members 26 and 27 are fixed to the mounting member 20 and the spacer plate portion 23 while being sandwiched between the mounting member 20 and the spacer plate portion 23 of the rubber fixing member 22, and vertically when the stopper is mounted. Since the closed cross-section 38 substantially orthogonal to the vertical direction is formed between the mounting member 20 and the spacer plate portion 23 in the vertical direction, it is possible to ensure the rigidity of the bump stopper 5 against the load input in the vertical direction. it can.

  Further, when the closed cross section 38 is formed, the bump rubber bracket 6 can be easily manufactured because the pair of intermediate members 26 and 27 may be fixed together in a state where the closed cross section 38 is formed. . Further, since the pair of intermediate members 26 and 27 have the same shape, the necessary types of intermediate members can be unified.

  Further, since the closed cross section 38 is formed by combining the pair of intermediate members 26 and 27, the mounting member 20 (fixed plate portion 31) and the rubber fixing member are adjusted by appropriately adjusting the relative positions of the pair of intermediate members 26 and 27. The size of the closed cross-section 38 is changed by adhering to 22 (spacer plate portion 23). For this reason, the desired rigidity can be ensured by setting the closed section 38 corresponding to the rigidity without changing the member.

  In the above embodiment, the lower edge portions of the intermediate members 26 and 27 are fixed to the spacer plate portion 23, the bump rubber 7 is fixed to the rubber fixing plate portion 24, and the spacer plate portion 23 and the rubber fixing plate portion 24 are connected. However, the spacer plate portion 23 may be omitted, and the lower edge portions of the intermediate members 26 and 27 may be welded to the upper surface 24a of the rubber fixing plate portion 24.

  Further, although the mounting member 20 is fixed to the opposing surface on the vehicle body side (the lower surface 4a of the side frame 4), the mounting member may be fixed to the opposing surface on the axle side (the upper surface 13a of the crank plate 13). In this case, the bump rubber faces the opposite surface on the vehicle body side from below.

  Moreover, although the case where the bump stopper 5 is applied to a vehicle in which the rear axle 2 is disposed below the side frame 4 has been described, the bump stopper 5 is applied to a vehicle in which the rear axle 2 is disposed above the side frame. Also good. In this case, the opposite surface on the vehicle body faces the opposite surface on the axle side from below.

  Further, the case where the bump stopper 5 is applied to the rear single axle vehicle having one rear axle 2 has been described. However, the vehicle to which the bump stopper 5 can be applied is not limited to the rear single axle vehicle, and the front axle and the rear axle 2 are applicable. The bump stopper 5 may be applied to a rear biaxial vehicle having a rear axle. In this case, the center portion of the leaf spring is supported by the side frame so as to be rotatable about a rotation shaft extending in the vehicle width direction, and the axle of the front shaft is fastened to the front end portion of the leaf spring to elastically support the side frame, The rear axle is fastened to the rear end of the leaf spring to elastically support the side frame. The bump stopper is fixed to the side frame so as to face the axles of the front shaft and the rear shaft above the front end portion and the rear end portion of the leaf spring.

  The bump stopper 5 applied to the rear axle 2 that elastically supports the side frame 4 via the leaf suspension 12 has been described. However, the suspension system to which the bump stopper 5 can be applied is not limited to this, and other systems ( For example, even if the bump stopper 5 is applied to a system in which a rear axle elastically supports a side frame by vertically interposing a coil spring between a vehicle body side facing surface and an axle side facing surface). Good.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it should be added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  The present invention is widely applicable as a bump stopper.

1 Body frame 2 Rear axle (axle)
3 Leaf suspension 4 Side frame 4a Lower side of the side frame (opposite surface on the vehicle body side)
5 Bump stopper 6 Bump rubber bracket 7 Bump rubber 11 Suspension spacer 12 Leaf spring 13 Crank plate 13a Top surface of crank plate (opposite surface on axle side)
20 Mounting member 21 Bump rubber spacer 22 Rubber fixing member 23 Spacer plate portion 24 Rubber fixing plate portion 25 Rubber mounting portion 26, 27 One pair of intermediate members 29 Rubber side member 30F, 30R Mounting plate portion 31 Adhering plate portion 32F, 32R Mounting Bolts 33F, 33R Mounting bolt insertion holes 34F, 34R Bracket side connection bolt insertion holes 35F, 35R Rubber side connection bolt insertion holes 36F, 36R Connection bolts 37F, 37R Connection nuts 38 Closed section 40 Rear tire (wheel)

Claims (1)

An axle-side facing surface that is fixedly provided on the axle that supports the wheels and a vehicle-side facing surface that is fixedly provided on the vehicle body side and faces the axle-side facing surface from above or below. A bump stopper that
Fixed to the mounting member and the rubber fixing member in a state sandwiched between the mounting member fixed in a state of surface contact with one of the two opposing surfaces, a rubber fixing member, and the mounting member and the rubber fixing member A bump rubber bracket having a pair of intermediate members;
Bump rubber that is fixed to the rubber fixing member, and in the stopper mounting state in which the mounting member is fixed to the one opposing surface, and is opposed to the other of the two opposing surfaces from above or below,
The pair of intermediate members have the same shape, and a closed cross section substantially perpendicular to the vertical direction in the stopper mounted state is uniformly formed along the vertical direction between the mounting member and the rubber fixing member. Bump stopper characterized by

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