Straddle-type vehicle

Abstract

To provide a straddle type vehicle that is able to easily discharge water, paint or the like when the water, the paint or the like remains in a swing arm, is able to secure high fastening force when a rear-wheel support portion is fastened, and is able to reduce the weight of the swing arm.SOLUTION: A straddle type vehicle includes a swing arm (16) suspending a rear wheel (15) from a body frame (11), and the rear wheel (15) is supported on a rear-wheel support portion (60) of the swing arm (16) via an axle (15a). The rear-wheel support portion (60) has a color (96) in which the axle (15a) is inserted between an outer surface of the rear-wheel support portion (60) outside in a vehicle width direction. The color (96) is fixed to the outer surface of the rear-wheel support portion (60). An inner surface of the rear-wheel support portion (60) has an open hole (69) that is open vertically across the entire width of the rear-wheel support portion (60).SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a straddle-type vehicle.

Background Art

[0002] Patent Document 1 discloses a straddle-type vehicle including a swing arm that suspends a rear wheel on a vehicle body frame, and the rear wheel is supported on a rear wheel support portion of the swing arm via an axle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional configuration, when water, paint, etc. remain inside the swing arm, there is a problem that it is difficult to discharge the water, paint, etc. Further, since the rigidity of the rear wheel support portion is high, when the rear wheel support portion is tightened, it is difficult to ensure high tightening stability and it is difficult to reduce the weight of the swing arm. An object of the present invention is to solve the above-described problems, and when water, paint, etc. remain inside the swing arm, the water, paint, etc. can be easily discharged, high tightening stability can be ensured when the rear wheel support portion is tightened, and further, to provide a straddle-type vehicle in which the weight of the swing arm can be reduced.

Means for Solving the Problems

[0005] In a straddle-type vehicle including a swing arm that suspends a rear wheel on a vehicle body frame, and the rear wheel is supported on a rear wheel support portion of the swing arm via an axle, the rear wheel support portion is located on the outer side in the vehicle width direction of the rear wheel support portion Outer member and on the inner side in the vehicle width direction of Inner memberBetween them, a collar through which the axle is inserted is provided, and the collar is Outer member fixed to the Inner member of the rear wheel support portion, and the wherein the rear wheel support portion has a long hole-shaped axle support hole for adjusting the position of the axle supporting the rear wheel in the vehicle longitudinal direction, and the open hole is formed behind the axle support hole of the rear wheel support portion is provided with an open hole that extends over the entire vertical width of the rear wheel support portion and opens.

Advantages of the Invention

[0006] According to the present invention, when water, paint, etc. remain inside the swing arm, the water, paint, etc. can be easily discharged, and high tightening stability can be ensured when the rear wheel support portion is tightened. Furthermore, it is possible to provide a saddle-riding type vehicle in which the swing arm can be lightened.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description, the descriptions of directions such as front, rear, left, right, up, and down are the same as the directions with respect to the vehicle body unless otherwise specified. Also, the symbol FR shown in each figure indicates the front of the vehicle body, the symbol UP indicates the upper part of the vehicle body, and the symbol LH indicates the left side of the vehicle body.

[0009] [Embodiment] FIG. 1 is a side view of a straddle-type vehicle 10 according to an embodiment of the present invention. The straddle-type vehicle 10 is a vehicle including a vehicle body frame 11, a power unit 12 supported by the vehicle body frame 11, a front fork 14 that supports a front wheel 13 so as to be steerable, a swing arm 16 that supports a rear wheel 15, and a seat 17 for a passenger. The straddle-type vehicle 10 is a vehicle in which a passenger sits astride the seat 17. The seat 17 is provided above the rear part of the vehicle body frame 11.

[0010] The vehicle body frame 11 includes a head pipe 18 provided at the front end of the vehicle body frame 11, a front frame 19 located behind the head pipe 18, and a rear frame 20 located behind the front frame 19. The front end of the front frame 19 is connected to the head pipe 18. The seat 17 is supported by the rear frame 20.

[0011] The front fork 14 is supported by the head pipe 18 so as to be steerable left and right. The front wheel 13 is supported by an axle 13a provided at the lower end of the front fork 14. A steering handle 21 gripped by the passenger is attached to the upper end of the front fork 14.

[0012] The swing arm 16 is supported by a pivot shaft 22 supported by the vehicle body frame 11. The pivot shaft 22 is a shaft that extends horizontally in the vehicle width direction. The pivot shaft 22 is inserted through the front end portion of the swing arm 16. The swing arm 16 swings up and down about the pivot shaft 22. The rear wheel 15 is supported by an axle 15a provided at the rear end portion of the swing arm 16.

[0013] The power unit 12 is disposed between the front wheel 13 and the rear wheel 15 and is supported by the vehicle body frame 11. The power unit 12 is an internal combustion engine. The power unit 12 includes a crankcase 23 and a cylinder section 24 that houses a reciprocating piston. An exhaust device 25 is connected to the exhaust port of the cylinder section 24. The output of the power unit 12 is transmitted to the rear wheel 15 by a driving force transmission member that connects the power unit 12 and the rear wheel 15.

[0014] In addition, the saddle-type vehicle 10 includes a front fender 26 that covers the front wheel 13 from above, a rear fender 27 that covers the rear wheel 15 from above, a step 28 on which the occupant places their feet, and a fuel tank 29 that stores the fuel used by the power unit 12. The front fender 26 is attached to the front fork 14. The rear fender 27 and the step 28 are provided below the seat 17. The fuel tank 29 is supported by the vehicle body frame 11.

[0015] A drive sprocket 31 is fixed to the output shaft of the power unit 12. An endless drive chain 32 is wound around the drive sprocket 31. The drive chain 32 extends toward the rear wheel 15 and is wound around a driven sprocket 33 provided on the rear wheel 15. When the drive sprocket 31 rotates by the power unit 12, the driven sprocket 33 rotates via the drive chain 32, and a rotational force as a driving force is transmitted to the rear wheel 15. The rear wheel 15 includes a wheel 35 rotatably supported by an axle 15a and a tire 36 supported by the wheel 35. The driven sprocket 33 is supported by the wheel 35.

[0016] The saddle-type vehicle 10 includes a rear cushion 38. The rear cushion 38 extends in the vertical direction. The upper end portion of the rear cushion 38 is connected to the vehicle body frame 11. The lower end portion of the rear cushion 38 is connected to the swing arm 16 via a link mechanism 39. The link mechanism 39 is swingably supported at the lower portion of the rear end of the front frame 19.

[0017] FIG. 2 is a perspective view of the swing arm 16 as viewed from the left rear side. The swing arm 16 includes a cylindrical pivot portion 41 extending in the vehicle width direction. A pivot shaft 22 (see FIG. 1) is inserted through the pivot portion 41. A left arm portion 42 extending rearward is formed on the left portion (one side portion in the vehicle width direction) of the pivot portion 41. A right arm portion 43 extending rearward and facing the left arm portion 42 is formed on the right portion (the other side portion in the vehicle width direction) of the pivot portion 41. A cross member portion 44 connecting between the left and right arm portions 42 and 43 in the vehicle width direction is formed between the left arm portion 42 and the right arm portion 43.

[0018] Due to the surrounding shape of the pivot portion 41, the left and right arm portions 42 and 43, and the cross member portion 44, an opening-shaped cushion insertion portion 16A penetrating in the vertical direction is formed. The rear cushion 38 is arranged in a state of being inserted in the vertical direction through the cushion insertion portion 16A. A cushion receiving portion 44A is formed at the lower portion of the cross member portion 44. The lower end of the rear cushion 38 is connected to the cushion receiving portion 44A via a link mechanism 39. The pivot portion 41, the arm portions 42 and 43, and the cross member portion 44 are integral.

[0019] The arm portions 42 and 43 are formed in a hollow shape. End pieces 60L and 60R are fixed to the rear ends of the arm portions 42 and 43 in a state of being mounted from the rear. The end pieces 60L and 60R have an arrangement portion 45 in which the outer surface in the vehicle width direction is recessed inward in the vehicle width direction. An adjuster mechanism 50 for adjusting the tension of the drive chain 32 is arranged in the arrangement portion 45. The adjuster mechanism 50 includes an adjuster plate 51 through which the axle 15a is inserted, an adjustment bolt 52 for positioning the adjuster plate 51, and a lock nut 53 fastened to the adjustment bolt 52.

[0020] At the front of the configuration unit 45, a bolt hole portion 98 extending in the front-rear direction is formed. An adjustment bolt 52 is fastened to the bolt hole portion 98 with a lock nut 53 fastened thereto. The position of the adjustment bolt 52 in the front-rear direction is adjusted according to the fastening amount of the adjustment bolt 52 with respect to the bolt hole portion 98. Therefore, the position of the adjuster plate 51 that abuts against the adjustment bolt 52 in the front-rear direction is adjusted, and the position of the driven sprocket 33 supported by the axle 15a is adjusted. Thereby, the distance between the drive sprocket 31 and the driven sprocket 33 is adjusted, and the tension of the drive chain 32 is adjusted.

[0021] A rear wheel 15 (see FIG. 1) is rotatably supported by the axle 15a. In the axial direction of the axle 15a, a hub damper 34 is supported on the left side (one side in the vehicle width direction) of the wheel 35 of the rear wheel 15. The hub damper 34 has a substantially cylindrical outer appearance. The hub damper 34 is inserted through the axle 15a and configured to be relatively rotatable with respect to the axle 15a. The hub damper 34 includes a plurality of dampers 34A and a casing 34B that houses the plurality of dampers 34A. The hub damper 34 is connected to the wheel 35 via the damper 34A. The hub damper 34 can rotate integrally with the wheel 35 by the damper 34A.

[0022] The driven sprocket 33 is fixed to the casing 34B of the hub damper 34. Therefore, when the drive sprocket 31 is rotated by the power unit 12, a rotational force is transmitted to the driven sprocket 33 via the drive chain 32, and the rotational force is transmitted to the wheel 35 of the rear wheel 15 via the hub damper 34. At this time, since the driven sprocket 33 is connected to the wheel 35 via the damper 34A, it is easy to reduce the torque shock associated with acceleration and deceleration.

[0023] With the rear wheel 15 interposed therebetween, a rear wheel brake device 55 is provided on the opposite side of the driven sprocket 33. The rear wheel brake device 55 of the present embodiment is a disc brake. The rear wheel brake device 55 includes a disc-shaped brake disc 56, a brake caliper 57 that sandwiches and brakes the brake disc 56, and a caliper stay 58 that supports the brake caliper 57.

[0024] The brake disc 56 is fixed to the right side surface (the other side surface in the vehicle width direction) of the wheel 35 by a plurality of bolts 56A. Therefore, the brake disc 56 rotates integrally with the rear wheel 15. On the other hand, the brake caliper 57 is fixed to the swing arm 16 via the caliper stay 58.

[0025] The caliper stay 58 has a cylindrical spacer portion 58A through which the axle 15a is inserted. Axial positioning with respect to the axle 15a is performed by the spacer portion 58A. A support portion 58B that extends forward in the radial direction is formed on the spacer portion 58A. The brake caliper 57 is supported by the support portion 58B. The support portion 58B is connected to a brake rotation prevention portion 43A that protrudes from the inner surface of the right arm portion 43. When the brake caliper 57 sandwiches the brake disc 56, the brake rotation prevention portion 43A regulates the brake caliper 57 from following the rotation of the brake disc 56.

[0026] The axle 15a is in the shape of a bolt. A nut portion 59 is fastened to one end portion of the axle 15a. By fastening the nut portion 59 and tightening the arm portions 42 and 43, the hub damper 34 on the axle 15a, the wheel 35 of the rear wheel 15, the caliper stay 58 of the rear wheel brake device 55, etc. are positioned in the axial direction.

[0027] FIG. 3 is an enlarged perspective view of the rear part of the swing arm 16. FIG. 4 is an exploded perspective view of the left end piece (rear wheel support portion). FIG. 5 is a plan view of the left end piece as viewed from the inner side in the vehicle width direction. FIG. 6 is a top view of the left end piece. As shown in FIG. 3, the end pieces 60R and 60L are formed in a substantially rectangular shape when viewed in the vehicle width direction. The left end piece 60L is welded to the rear end of the left arm portion 42 with a bead 100, and the right end piece 60R is welded to the rear end of the right arm portion 43 with a bead 100. The end pieces 60R and 60L according to the present embodiment correspond to the rear wheel support portion 60. Since the structures of the left and right end pieces (rear wheel support portions) 60R are formed in a substantially left-right symmetric manner, the structure of the left end piece 60L will be described, and the description of the right end piece 60R will be omitted.

[0028] Long hole-shaped axle support holes 68 extending in the front-rear direction are formed in the end pieces 60L and 60R. The axle 15a of the rear wheel 15 is inserted through the axle support hole 68. As shown in FIG. 4, the end piece 60L includes an inner plate member 70 that is open to the outside in the vehicle width direction and is formed in a U-shaped cross section, an outer plate member 90 that is connected to the inner plate member 70 from the outside in the vehicle width direction, and the bolt hole portion 98 provided in the arrangement portion 45 (see FIG. 1).

[0029] The outer plate member 90 includes a base outer plate portion 91, an upper outer plate portion 92 formed by bending the upper edge of the base outer plate portion 91 inward, and a lower outer plate portion 93 formed by bending the lower edge of the base outer plate portion 91 inward. The joint portions of the base outer plate portion 91, the upper outer plate portion 92, and the lower outer plate portion 93 are curved. The upper outer plate portion 92 and the lower outer plate portion 93 extend parallel to each other facing each other.

[0030] The outer panel member 90 has a base protruding portion 95 that protrudes in a rectangular shape at the central portion on the inner side in the vehicle width direction. At the center of the base protruding portion 95, an elongated hole-shaped axle support collar (collar) 96 is joined. The axle support collar 96 abuts against the base inner panel portion 71 when assembling the end piece 60L described later. On the outer side in the vehicle width direction of the base protruding portion 95, a recessed arrangement portion 45 (see FIG. 2) is formed on the inner side. An axle support hole 68 is provided in the base protruding portion 95. At the front portion of the base protruding portion 95, a collar protruding portion 99 is provided. The collar protruding portion 99 is recessed in an arc shape, and a bolt hole portion 98 is joined from the outer side in the vehicle width direction.

[0031] The inner panel member 70 includes a base inner panel portion 71, an upper inner panel portion 72 formed by bending the upper edge of the base inner panel portion 71 outward so as to face the upper outer panel portion 92 of the outer panel member 90, and a lower inner panel portion 73 formed by bending the lower edge of the base inner panel portion 71 outward so as to face the lower outer panel portion 93 of the outer panel member 90. The joint portions of the base inner panel portion 71, the upper inner panel portion 72, and the lower inner panel portion 73 are curved. The upper inner panel portion 72 and the lower inner panel portion 73 extend parallel to each other facing each other. An axle support hole 68 is provided in the base inner panel portion 71.

[0032] As shown in FIGS. 4 - 6, the upper outer panel portion 92 and the lower outer panel portion 93 of the outer panel member 90 each have an outer panel step portion 92b at the rear portion of the upper outer panel portion 92 and the rear portion of the lower outer panel portion 93. The outer panel step portion 92b extends separating the rear end portion RS-1 and the front end side FS-1 of the upper outer panel portion 92 and the lower outer panel portion 93, and is continuously perpendicular to the inner surface of the rear end portion RS-1 of the upper outer panel portion 92 and the inner surface of the rear end portion RS-1 of the lower outer panel portion 93. The front end sides FS-1 of the upper outer panel portion 92 and the lower outer panel portion 93 extend substantially linearly and are formed lower than the rear end portion RS-1 respectively.

[0033] Also, the upper inner panel portion 72 and the lower inner panel portion 73 of the inner panel member 70 each have an inner panel step portion 72b at the rear portion of the upper inner panel portion 72 and the rear portion of the lower inner panel portion 73. The inner panel step portion 72b extends separating the rear end portion RS-2 and the front end side FS-2 of the upper inner panel portion 72 and the rear end portion RS-2 and the front end side FS-2 of the lower inner panel portion 73, and is continuously perpendicular to the surface of the base inner panel portion 71.

[0034] As shown in FIG. 5, the width dimension W of the rear end portion RS-2 separated by the inner plate step portion 72b is formed to be smaller than the width dimension W1 between the upper outer plate portion 92 and the lower outer plate portion 93 of the outer plate member 90, and the protruding dimension T of the rear end portion RS-2 is formed to be smaller than the protruding dimension T1 of the rear end portion RS-1 of the upper outer plate portion 92 and the lower outer plate portion 93. A substantially U-shaped opening hole 69 is formed between the rear end portion RS-2 of the inner plate member 70 and the rear end portion RS-1 of the outer plate member 90 when viewed from the inner side in the vehicle width direction. In addition, in FIG. 5 and FIG. 7 shown below, for convenience of explanation, the portions constituting the opening hole 69 are shown with hatching. The protruding dimension T of the rear end portion RS-2 is approximately half the dimension of the protruding dimension T1 of the rear end portion RS-1 of the upper outer plate portion 92 and the lower outer plate portion 93. If the protruding dimension T of the rear end portion RS-2 is too large, the opening area of the opening hole 69 becomes too narrow, and if the protruding dimension T of the rear end portion RS-2 is too small, the overlapping area between the rear end portion RS-2 and the long hole-shaped axle support collar 96 becomes too small.

[0035] FIG. 7 is a perspective view of the left end piece as viewed from the inner side in the vehicle width direction. FIG. 8 is an enlarged perspective view of the left end piece. In the present embodiment, the substantially U-shaped opening hole 69 extends substantially over the entire vertical width of the end pieces 60R and 60L (rear wheel support portions) on the inner surfaces of the left and right end pieces, and opens to the inside of the end pieces 60R and 60L. The shape of the opening hole 69 is not limited to a substantially U-shaped form. For example, a substantially I-shaped form may also be used. When the inner plate member 70 is cut at the position of the inner plate step portion 72b and the rear end portion RS-2 is cut off, the shape of the opening hole 69 appears as a substantially I-shaped form when viewed from the inner surface.

[0036] When assembling the end piece 60L, referring to FIG. 4, first, the axle support collar 96 and the bolt hole portion 98 are welded to the outer plate member 90. The bolt hole portion 98 is fitted into the recess of the collar protruding portion 99 and welded through the round hole 99a. The axle support collar 96 is welded to the base protruding portion 95. When welding the axle support collar 96, only the front end portion and the rear end portion of the axle support collar 96 are welded, and the upper edge portion and the lower edge portion of the axle support collar 96 are not welded. This is to prevent increasing the rigidity of the outer plate member 90 more than necessary.

[0037] Next, the inner plate member 70 is welded to the outer plate member 90. First, the upper inner plate portion 72 of the inner plate member 70 is abutted against the upper outer plate portion 92 of the outer plate member 90, and the lower inner plate portion 73 of the inner plate member 70 is abutted against the lower outer plate portion 93 of the outer plate member 90. Then, as shown in FIG. 7, the side edges of the front end side FS-2 of the upper inner plate portion 72 and the side edges of the front end side FS-2 of the lower inner plate portion 73 are welded. According to the present embodiment, each side edge of the rear end portion RS-2 of the inner plate member 70 is not welded, and the rear end portion RS-2 is in a free state.

[0038] As shown in FIG. 2, when attaching the rear wheel 15 between the end pieces 60R and 60L, the axle 15a is disposed between the end pieces 60R and 60L, the nut portion 59 is rotated, and the end pieces 60R and 60L are tightened from both sides. Generally, before tightening the end pieces 60R and 60L, there is a gap between the axle support collar 96 of the outer plate member 90 and the base inner plate portion 71 of the inner plate member 70. If the rigidity of the inner plate member 70 is too high, the inner plate member 70 may not be deformed and may not be in close contact with the axle support collar 96. According to the present embodiment, since each side edge of the rear end portion RS-2 of the inner plate member 70 is not welded and is in a free state, the rigidity of the inner plate member 70 can be lowered. Thereby, when the nut portion 59 is rotated and the end pieces 60R and 60L are tightened from both sides, referring to FIG. 7, the rear end portion RS-2 of the inner plate member 70 is easily deformed, so that the degree of close contact between the rear end portion RS-2 of the inner plate member 70 and the axle support collar 96 of the outer plate member 90 is increased, and the support rigidity of the axle 15a is improved.

[0039] In the present embodiment, as shown in FIG. 7, a substantially U-shaped large opening hole 69 is formed between the rear end portion RS-2 of the inner plate member 70 and the rear end portion RS-1 of the outer plate member 90 in an inner surface view, so that the end pieces 60R and 60L are lightened. In addition, since a large opening hole 69 is formed, when water, paint, or the like remains inside the swing arm 16, it can be easily discharged to the outside through the large opening hole 69. Thereby, the rust prevention effect of the swing arm 16 is enhanced.

[0040] In the present embodiment, arc welding or the like is used for joining. Therefore, a weld bead 100 is formed at the welded portion.

[0041] As described above, according to the first embodiment to which the present invention is applied, in a saddle-riding type vehicle 10 including a swing arm 16 that suspends a rear wheel 15 on a vehicle body frame 11 and supporting the rear wheel 15 on a rear wheel support portion 60 of the swing arm 16 via an axle 15a, the rear wheel support portion 60 includes a collar 96 through which the axle 15a is inserted between an outer surface on the outer side in the vehicle width direction and an inner surface on the inner side in the vehicle width direction of the rear wheel support portion 60. The collar 96 is fixed to the outer surface of the rear wheel support portion 60 and includes an opening hole 69 that extends over the entire vertical width of the rear wheel support portion 60 and opens on the inner surface of the rear wheel support portion 60. According to this configuration, due to the opening hole 69 that extends over the entire vertical width and opens, when water, paint, or the like remains inside the swing arm 16, the water, paint, or the like can be easily discharged. Also, due to the opening hole 69 that extends over the entire vertical width and opens, the rigidity of the inner surface of the rear wheel support portion 60 can be appropriately reduced. When the rear wheel support portion 60 is tightened via the axle 15a, it is easy to bring the collar into close contact with the inner surface, ensuring high tightening stability, and the positions of the hub damper 34 on the axle 15a, the wheel 35 of the rear wheel 15, the caliper stay 58 of the rear wheel brake device 55, etc. are likely to be stable in the axial direction. Furthermore, due to the opening hole 69 that extends over the entire vertical width and opens, the weight of the swing arm 16 can be reduced. Therefore, according to the above configuration, when water, paint, or the like remains inside the swing arm 16, the water, paint, or the like can be easily discharged, high tightening stability can be ensured when the rear wheel support portion 60 is tightened, and furthermore, the weight of the swing arm 16 can be reduced.

[0042] The rear wheel support portion 60 is formed by an inner plate member 70 and an outer plate member 90, and the open hole 69 is formed between the rear end portion RS-2 of the inner plate member 70 and the rear end portion RS-1 of the outer plate member 90. According to this configuration, when water, paint, or the like remains inside the swing arm 16, the rear wheel support portion 60 can easily discharge the water, paint, or the like by tilting the swing arm 16 downward. Therefore, for example, when the saddle-riding type vehicle 10 is running, the swing arm 16 swings around the pivot shaft 22, and when the swing arm 16 is inclined downward with respect to the pivot shaft 22, it is easy to discharge the water remaining inside the swing arm 16. Also, for example, during manufacturing, in the painting method of directly dipping the swing arm 16 into paint, so-called dunking, by pulling up the swing arm 16 and making the rear wheel support portion 60 face downward, it is easy to discharge the paint remaining inside the swing arm 16.

[0043] The rear wheel support portion 60 has a long hole-shaped axle support hole 68 that can adjust the position of the axle 15a that supports the rear wheel 15 in the vehicle longitudinal direction, and the open hole 69 is substantially U-shaped surrounding the rear end side of the axle support hole 68. According to this configuration, since the open hole 69 is substantially U-shaped surrounding the rear end side of the axle support hole 68 with a certain width, compared with the case where the open hole 69 is provided up to the vicinity of the rear end side of the axle support hole 68, the rigidity of the rear wheel support portion 60 is not excessively reduced, the rigidity can be reduced to a certain extent, and when the rear wheel support portion is tightened, a high tightening force can be ensured. Also, by providing the open hole, the swing arm can be lightened.

[0044] The rear wheel support portion 60 has a long hole-shaped axle support hole 68 that adjusts the position of the axle 15a that supports the rear wheel 15 in the vehicle longitudinal direction, and the foremost end of the open hole 69 is formed on the rear side of the axle center when the axle 15a is at the rearmost end of the axle support hole 68. According to this configuration, even when the axle is at the rearmost end of the axle support hole, a member supported by the axle 15a and contacting the inner plate member, for example, the hub damper 34 and the caliper stay 58 of the rear wheel brake device 55 overlap with the inner plate member 70, increasing the seating surface area of the inner plate member 70 and making it difficult for the tire to sway laterally during running.

[0045] The rear end shape of the rear end portion RS-1 of the outer plate member 90 and the rear end shape of the rear end portion RS-2 of the inner plate member 70 are substantially similar in a view from the inner surface of the rear wheel support portion 60, and each rear end angle is an R shape. According to this configuration, since the rear end shape of the rear end portion RS-1 of the outer plate member 90 and the rear end shape of the rear end portion RS-2 of the inner plate member 70 are substantially similar, a sense of shape unity can be obtained and the appearance can be improved.

[0046] The open hole 69 overlaps with the outer plate member 90 in a top view of the rear wheel support portion 60, and the front end of the overlapping portion of the outer plate member 90 and the open hole 69 is orthogonal to the inner surface of the rear wheel support portion 60. According to this configuration, by covering the upper part of the open hole 69 with the outer plate member 90, the open hole 69 cannot be seen in a view from the outside in the vehicle width direction, and the appearance can be improved. Also, since the overlap with the outer plate member 90 is at a right angle, there is no extra portion compared to the case where it is formed obliquely, the outer plate member 90 can be configured, and weight reduction can be achieved.

[0047] [Other Embodiments] The above-described embodiments merely show one aspect of the present invention, and arbitrary modifications and applications are possible without departing from the gist of the present invention.

[0048] In the above-described embodiments, the rear wheel support portion 60 is formed by providing and joining the inner plate member 70 and the outer plate member 90. However, these may be integrally formed.

[0049] The width dimension W of the rear end portion RS-2 and the protruding dimension T of the rear end portion RS-2 separated by the inner plate step portion 72b can be appropriately changed according to the required rigidity and weight.

[0050] The above embodiment supports the following configurations.

[0051] (Configuration 1) In a saddle-riding type vehicle including a swing arm that suspends a rear wheel on a vehicle body frame and supporting the rear wheel on a rear wheel support portion of the swing arm via an axle, the rear wheel support portion includes a collar through which the axle is inserted between an outer surface on the outer side in the vehicle width direction and an inner surface on the inner side in the vehicle width direction of the rear wheel support portion, the collar is fixed to the outer surface of the rear wheel support portion, and the inner surface of the rear wheel support portion is provided with an open hole that extends over the entire vertical width of the rear wheel support portion and opens. According to this configuration, when water, paint, or the like remains inside the swing arm, the water, paint, or the like can be easily discharged through the open hole that extends over the entire vertical width and opens. Further, the rigidity of the inner surface of the rear wheel support portion can be appropriately reduced by the open hole that extends over the entire vertical width and opens, and when the rear wheel support portion is tightened via the axle, it is easy to bring the collar into close contact with the inner surface, ensuring high tightening stability. Furthermore, the weight of the swing arm can be reduced by the open hole that extends over the entire vertical width and opens. Therefore, according to the above configuration, when water, paint, or the like remains inside the swing arm, the water, paint, or the like can be easily discharged, high tightening stability can be ensured when the rear wheel support portion is tightened, and furthermore, a saddle-riding type vehicle in which the weight of the swing arm can be reduced can be provided.

[0052] (Configuration 2) The rear wheel support portion is formed of an inner plate member and an outer plate member, and the open hole is formed between a rear end portion of the inner plate member and a rear end portion of the outer plate member. The saddle-riding type vehicle according to Configuration 1. According to this configuration, when water, paint, or the like remains inside the swing arm, the water, paint, or the like can be easily discharged by tilting the swing arm so that the rear wheel support portion is downward.

[0053] (Configuration 3) The rear wheel support portion has a long hole-shaped axle support hole capable of adjusting the position of the axle that supports the rear wheel in the vehicle longitudinal direction, and the open hole is substantially U-shaped surrounding the rear end side of the axle support hole. The saddle-riding type vehicle according to Configuration 1 or 2. According to this configuration, since the opening hole is substantially U-shaped that surrounds the rear end side of the axle support hole with a certain width, compared with the case where the opening hole is provided up to the vicinity of the rear end side of the axle support hole, the rigidity of the rear wheel support portion is not excessively reduced, the rigidity can be reduced to some extent, and when the rear wheel support portion is tightened, a high tightening force can be ensured. Further, by providing the opening hole, the swing arm can be lightened.

[0054] (Configuration 4) The rear wheel support portion has a long hole-shaped axle support hole capable of adjusting the position of the axle that supports the rear wheel in the vehicle longitudinal direction, and the foremost end of the opening hole is formed to be located on the rear side of the axle center when the axle is at the rearmost end of the axle support hole, for the saddle-riding type vehicle according to any one of Configurations 1 to 3. According to this configuration, even when the axle is at the rearmost end of the axle support hole, the member that is supported by the axle and abuts against the inner plate member overlaps with the inner plate member, the seating surface area of the inner plate member becomes large, and it becomes difficult for the tire to roll laterally during traveling.

[0055] (Configuration 5) The rear end shape of the rear end portion of the outer plate member and the rear end shape of the rear end portion of the inner plate member are substantially similar shapes in a view from the inner surface of the rear wheel support portion, and each rear end angle is an R shape, for the saddle-riding type vehicle according to any one of Configurations 1 to 4. According to this configuration, since the rear end shape of the rear end portion of the outer plate member and the rear end shape of the rear end portion of the inner plate member are substantially similar shapes, a sense of shape unity can be obtained and the appearance can be improved.

[0056] (Configuration 6) The opening hole overlaps with the outer plate member in a top view of the rear wheel support portion, and the front end of the overlapping portion of the outer plate member and the opening hole is orthogonal to the inner surface of the rear wheel support portion, for the saddle-riding type vehicle according to any one of Configurations 1 to 5. According to this configuration, by covering the upper part of the opening hole with the outer plate member, the opening hole becomes invisible when viewed from the outside in the vehicle width direction, and the appearance can be improved. Further, since the overlap with the outer plate member is at a right angle, there is no extra portion compared with the case where it is formed obliquely, the outer plate member can be configured, and weight reduction can be achieved.

Explanation of Signs

[0057] 10 Saddle - type vehicle 11 Vehicle body frame 15 Rear wheel 15a Axle 16 Swing arm 22 Pivot shaft 45 Arrangement part 60 Rear wheel support part 60L Left end piece 60R Right end piece 68 Axle support hole 69 Open hole 70 Inner plate member 71 Base inner plate part 72 Upper inner plate part 72b Inner plate step part 73 Lower inner plate part 90 Outer plate member 91 Base outer plate part 92 Upper outer plate part 92b Outer plate step part 93 Lower outer plate part 95 Base protrusion 96 Axle support collar (collar) 98 Bolt hole part 99 Collar protrusion 99a Round hole 100 Weld bead

Claims

1. In a saddle-riding type vehicle having a swing arm (16) that suspends a rear wheel (15) on a vehicle body frame (11), and supporting the rear wheel (15) via an axle (15a) at a rear wheel support portion (60) of the swing arm (16), the rear wheel support portion (60) includes a collar (96) through which the axle (15a) is inserted between an outer member on the outer side in the vehicle width direction and an inner member on the inner side in the vehicle width direction of the rear wheel support portion (60), the collar (96) is fixed to the outer member of the rear wheel support portion (60), to the inner member of the rear wheel support portion (60), the rear wheel support portion (60) is provided with an open hole (69) that extends over the entire vertical width of the rear wheel support portion (60) and opens, the rear wheel support portion (60) has a long hole-shaped axle support hole (68) for adjusting the position of the axle (15a) that supports the rear wheel (15) in the vehicle longitudinal direction, the open hole (69) is formed behind the axle support hole (68), Saddle-riding type vehicle.

2. the rear wheel support portion (60) is formed of an inner plate member (70) that forms the inner member and an outer plate member (90) that forms the outer member, the open hole (69) is formed between a rear end portion (RS-2) of the inner plate member (70) and a rear end portion (RS-1) of the outer plate member (90), The saddle-riding type vehicle according to claim 1.

3. The open hole (69) is substantially U-shaped surrounding the rear end side of the axle support hole (68), The saddle-riding type vehicle according to claim 1 or 2.

4. the rear wheel support portion (60) has a long hole-shaped axle support hole (68) for adjusting the position of the axle (15a) that supports the rear wheel (15) in the vehicle longitudinal direction, the foremost end of the open hole (69) is formed to be located on the rear side of the axle center when the axle (15a) is at the rearmost end of the axle support hole (69), The saddle-riding type vehicle according to claim 1 or 2.

5. the rear end shape of the rear end portion (RS-1) of the outer plate member (90) and the rear end shape of the rear end portion (RS-2) of the inner plate member (70) are substantially similar in the inner surface view of the rear wheel support portion (60), and each rear end angle is an R shape, The saddle-riding type vehicle according to claim 2.

6. The outer plate member (90) has a base outer plate portion (91) that forms the outer surface in the vehicle width direction of the rear wheel support portion (60), an upper outer plate portion (92) formed by bending the upper edge of the base outer plate portion (91) inward in the vehicle width direction, and a lower outer plate portion (93) formed by bending the lower edge of the base outer plate portion (91) inward in the vehicle width direction, The inner panel member (70) includes a base inner panel portion (71) forming the inner surface in the vehicle width direction of the rear wheel support portion (60), an upper inner panel portion (72) formed by bending the upper edge of the base inner panel portion (71) outward in the vehicle width direction so as to face the upper outer panel portion (92), and a lower inner panel portion (73) formed by bending the lower edge of the base inner panel portion (71) outward in the vehicle width direction so as to face the lower outer panel portion (93). The open hole (69) is formed across the base inner panel portion (71), the upper inner panel portion (72), and the lower inner panel portion (73) in the inner panel member (70). In a top view of the rear wheel support portion (60), the open hole (69) overlaps with the outer panel member (90), and the front end of the overlapping portion of the outer panel member (90) and the open hole (69) is orthogonal to the base inner panel portion (71) of the rear wheel support portion (60). The saddle-riding type vehicle according to claim 2.

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