Vehicle structure

Abstract

To suppress an occasion in which a brake shaft is pushed down toward a wheel side even if external force that displaces a brake arm to the wheel side acts.SOLUTION: The vehicular structure includes: a drum brake 50 provided at the internal side relative to a wheel 15w; a brake shaft 51 extending from the drum brake 50 toward one side in the vehicle widthwise direction; a brake arm 52 connected to the brake shaft 51 at one side in the vehicle widthwise direction of the drum brake 50; and a casing member 43 placed at one side in the vehicle widthwise direction of the drum brake 50. The casing member 43 includes a brake arm peripheral portion 43r placed between the brake arm 52 and the drum brake 50. The brake arm peripheral portion 43r includes a reinforcement portion 60 at least a portion of which protrudes around a through-hole 43h through which the brake shaft 51 passes. A protrusion 61 that protrudes beyond the reinforcement portion 60 toward the brake arm 52 is provided on an opposing surface 43r1 that faces the brake arm 52.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a vehicle structure. [Background technology]

[0002] A known vehicle structure for a saddle-ride vehicle or the like includes a drum brake provided on the inside of the rear wheel, a brake shaft extending from the drum brake in one direction in the vehicle width direction, a brake arm connected to the brake shaft on one side of the drum brake in the vehicle width direction, and a case member arranged on one side of the drum brake in the vehicle width direction (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 161980 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-212661 Summary of the Invention [Problem to be solved by the invention]

[0004] However, even if an external force acts to move the brake arm toward the wheel, it is desirable to prevent the brake arm from moving toward the wheel and to prevent the brake shaft from being pushed toward the wheel. The present invention was made in consideration of the above-mentioned circumstances, and aims to prevent the brake shaft from being pushed toward the wheel even when an external force acts to move the brake arm toward the wheel. [Means for solving the problem]

[0005] In a vehicle structure including a drum brake provided on the inside of a wheel, a brake shaft extending from the drum brake in one direction in the vehicle width direction, a brake arm connected to the brake shaft on one side of the drum brake in the vehicle width direction, and a case member arranged on one side of the drum brake in the vehicle width direction, the case member has a brake arm peripheral portion located between the brake arm and the drum brake, the brake arm peripheral portion has a reinforcing portion in which at least a part of the periphery of the brake arm is raised around a through hole through which the brake shaft passes, and an opposing surface facing the brake arm The part that overlaps with the brake arm when viewed from the vehicle width direction The present invention provides a vehicle structure having a protruding portion that protrudes further than the reinforcing portion toward the brake arm. [Effects of the Invention]

[0006] According to the present invention, even if an external force acts to move the brake arm toward the wheel, it is possible to prevent the brake shaft from being pushed toward the wheel. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a side view of a saddle-ride type vehicle according to an embodiment of the present invention. [Figure 2] FIG. 2 is a view showing the rear structure of the saddle-ride type vehicle from the left side. [Figure 3] FIG. 2 is a view showing the saddle-ride type vehicle from the rear. [Figure 4] FIG. 4 is an enlarged view of region α in FIG. 3. [Figure 5] FIG. 2 is a cross-sectional view of a brake shaft together with the surrounding configuration. [Figure 6] FIG. 2 is a perspective view showing the brake shaft together with the surrounding configuration. [Figure 7] FIG. 10 is a diagram showing the protrusion and the step together with the surrounding configuration from the rear of the vehicle body. [Figure 8] FIG. 4 is a side view of the vehicle body showing the cross-sectional structure of the release portion together with the surrounding configuration. [Figure 9] FIG. 2 is a perspective view of the gear case from diagonally below on the left side. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the description, directions such as front, rear, left, right, up and down are the same as directions relative to the vehicle body unless otherwise specified. In addition, in each drawing, the symbol FR indicates the front of the vehicle body, the symbol UP indicates the upper side of the vehicle body, and the symbol LH indicates the left side of the vehicle body.

[0009] [Embodiment Mode] FIG. 1 is a side view of a saddle-ride type vehicle 10 according to an embodiment of the present invention. The saddle-ride type vehicle 10 is an electric motorcycle that includes a body frame 11, a motor 12 that drives a rear wheel 15 that is a drive wheel, a front fork 14 that supports a front wheel 13 so that it can be steered, a swing arm 16 that supports the rear wheel 15, a seat 17 for a rider, and a body cover 18 that covers the body frame 11. The saddle-ride type vehicle 10 is a vehicle in which a rider sits astride on a seat 17. The saddle-ride type vehicle 10 of this embodiment is a scooter-type electric two-wheeled vehicle equipped with a low step floor 19, a side stand 20a, and a center stand 20b.

[0010] The body frame 11 includes a head pipe 21 provided at the front of the vehicle body, a down frame 22 extending rearward and downward from the head pipe 21, an under frame 23 extending rearward from the down frame 22, and left and right rear frames 24 extending rearward and upward from the under frame 23. A step floor 19 is supported above the under frame 23, and is provided for a rider seated in the seat 17 to place their feet on.

[0011] The side stand 20a is rotatably supported on the lower left side of the body frame 11 and can be placed on the ground in an upright position, allowing the saddle-ride type vehicle 10 to be parked with the vehicle tilted to the left. The center stand 20b is rotatably supported on the swing arm 16 behind the side stand 20a and in front of the rear wheel 15 and can be placed on the ground in an upright position, allowing the saddle-ride type vehicle 10 to be parked upright without tilting to the left or right. The center stand 20b is also called a main stand.

[0012] The front forks 14 are supported by a head pipe 21 so as to be steerable to the left and right. The front wheel 13 is supported by a front wheel shaft 13a, which is an axle provided at the lower end of the front forks 14. A steering handle 25, which is held by the rider, is attached to the upper end of the front forks 14.

[0013] Left and right pivot portions 32 are supported by the left and right rear frames 24 via subframes 31. The left and right pivot portions 32 support the swing arm 16 via a pivot shaft 33 so that it can swing up and down. The swing arm 16 has a hollow structure and houses the motor 12 that drives the rear wheel 15 at a position on the left side of the rear wheel 15 in the vehicle width direction. Therefore, the swing arm 16 not only functions as a support member that supports the rear wheel 15, but also as a drive device that drives the rear wheel 15. The swing arm 16 can also be called a swing-type power unit. A rear cushion 26 is interposed between the rear end of the swing arm 16 and the rear frame 24.

[0014] The body cover 18 includes a front cover 18a that covers the front of the vehicle body from the front, left and right leg shields 18b that are connected to the left and right sides of the front cover 18a, a lower cover 18c that covers the lower part of the step 28, left and right center covers 18d that cover the lower part of the seat 17 from the front, and a pair of left and right body covers 18e that cover the lower part of the seat 17 from the left and right. Furthermore, the body cover 18 includes a front fender 18f that covers the front wheels 13 from above, and a rear fender 18g that covers the rear wheels 15 from above and behind.

[0015] Fig. 2 is a view showing the rear structure of the saddle-ride type vehicle 10 from the left side, and Fig. 3 is a view showing the saddle-ride type vehicle 10 from the rear. The symbol LC in Fig. 3 indicates the widthwise center of the saddle-ride type vehicle 10. 2 and 3, the swing arm 16 has a shape that extends from in front of the rear wheel 15 toward the left side of the rear wheel 15 in the vehicle width direction. The swing arm 16 is made up of multiple case members that are separated in the vehicle width direction. The swing arm 16 of this configuration includes a motor case 41 that houses the motor 12, a motor cover 42 connected to the outer side of the motor case 41 in the vehicle width direction, and a gear case 43 connected to the inner side of the motor case 41 in the vehicle width direction.

[0016] Fig. 4 is an enlarged view of region α in Fig. 3. For ease of explanation, some components are omitted in Fig. 4. The motor case 41 is a case member that houses the motor 12 and is formed in a shape that covers the motor 12 from the front, rear, top, and bottom of the vehicle body. The motor cover 42 is formed in a shape that covers the internal space of the motor case 41 from the outside in the vehicle width direction, and functions as a cover member that covers the motor 12 from the outside in the vehicle width direction. The gear case 43 is the case member of the swing arm 16 that is closest to the rear wheel 15, and is formed in a shape that accommodates a speed reduction mechanism between the motor shaft of the motor 12 and the rear wheel shaft 15a.

[0017] 2, in a side view of the vehicle body, the axis PM of the motor shaft of the motor 12 is located forward of the rear wheel axle 15a. In other words, the motor 12 is disposed at a position offset forward from the rear wheel axle 15a. The gear case 43 has a portion 43r (hereinafter referred to as the gear case rear portion 43r) that extends rearward, closer to the rear wheel axle 15a than the motor case 41 and the motor cover 42. The gear case rear portion 43r also covers the rear wheel axle 15a and its surroundings from the outside in the vehicle width direction.

[0018] As shown in Fig. 2, the saddle-ride type vehicle 10 is provided with a drum brake 50 that functions as a rear wheel brake, located inside the wheel 15w of the rear wheel 15. The drum brake 50 is covered from the left side (corresponding to the outer side in the vehicle width direction and the side opposite the wheel 15w) by the rear part of the gear case 43r. A brake shaft 51 extending to the left side, which is one side in the vehicle width direction, is connected to the drum brake 50. FIG. 5 shows a cross section of the brake shaft 51 together with the surrounding structure. 5, a through-hole 43h that penetrates in the vehicle width direction is provided in the gear case rear portion 43r. The brake shaft 51 passes through the through-hole 43h, so that the outer end of the brake shaft 51 in the vehicle width direction is exposed to the outside of the gear case rear portion 43r.

[0019] A brake arm 52 is connected to the outer end of the brake shaft 51 in the vehicle width direction. As shown in Figures 2 and 4, the brake arm 52 has a base 52a connected to the brake shaft 51, and an arm portion 52b extending from the base 52a in the centrifugal direction of the brake shaft 51 (below the brake shaft 51 in this configuration). A brake cable 56 (see FIG. 2) is connected to the tip of the arm portion 52b via an adjustment bolt 55. When the inner wire of the brake cable 56 is pulled, the brake arm 52 rotates around the axis of the brake shaft 51 (in the γ direction shown in FIG. 2), and the drum brake 50 enters a braking state in which it brakes the rear wheel 15.

[0020] Although the structure of the drum brake 50 is not particularly limited, as shown in Fig. 5, the drum brake 50 of this configuration has a drum 50a provided inside the wheel 15w and two brake shoes 50b arranged on either side of the rear wheel axle 15a, and functions as a cam that presses each brake shoe 50b against the drum 50a by rotating the brake shaft 51 in the γ direction. The brake shaft 51 is also called a brake cam shaft.

[0021] FIG. 6 is a perspective view showing the brake shaft 51 together with the surrounding structure. As shown in Figure 6, the gear case rear portion 43r has a raised portion 60, which is at least a portion of the periphery of the through hole 43h, and this raised portion 60 reinforces the periphery of the through hole 43h. Hereinafter, this raised portion 60 will be referred to as a "reinforcing portion 60." The gear case rear portion 43r also has an opposing surface 43r1 that faces the brake arm 52. The opposing surface 43r1 is provided with a protruding portion 61 that protrudes further than the reinforcing portion 60 toward the brake arm 52. The protrusion 61 is made of a rigid material such as a metal material, and in this configuration is formed integrally with the gear case 43. Even if an external force is generated that moves the brake arm 52 toward the wheel 15w, and the brake arm 52 moves toward the wheel 15w, the brake arm 52 comes into contact with the protrusion 61, and therefore, further movement of the brake arm 52 is suppressed. Since the movement of the brake arm 52 toward the wheel 15w side is suppressed, the movement of the brake shaft 51 connected to the brake arm 52 toward the wheel 15w side is also suppressed.

[0022] A step 62 is provided on the opposing surface 43r1 of the gear case rear portion 43r around the through hole 43h through which the brake shaft 51 passes. This step 62 is a step against which the rotation-stopping protrusion 52t provided on the base 52a of the brake arm 52 comes into contact when the brake arm 52 rotates in the direction opposite to the braking direction (the opposite direction to the γ direction shown in FIG. 2). This step 62 restricts the range of rotation of the brake arm 52 in the opposite direction to the γ direction. In this configuration, part of the raised portion of the protrusion 61 that rises from the gear case rear portion 43r toward the brake arm 52 serves as the step 62 against which the rotation-stopping protrusion 52t comes into contact. The protruding portion 61 protrudes from a part of the reinforcing portion 60 toward the brake arm 52, and the surface of the protruding portion of the protruding portion 61 (including the surface that constitutes the step 62 in this embodiment) 、 Reinforcement portion 60 Other than the surface of the above-mentioned raised part Intersects with the surface and connectedBecause the surface of the protruding portion 61 and the surface of the reinforcing portion 60 intersect, it is easier to provide a compact protruding portion 61 with the desired protruding amount compared to when the surfaces of the protruding portion 61 and the reinforcing portion 60 are smoothly connected. In addition, it is easier to make the surface of the raised portion of the protruding portion 61 a surface suitable for contacting the rotation-stopping projection 52t (the surface that constitutes the step 62).

[0023] FIG. 7 is a view showing the protrusion 61 and the step 62 together with the surrounding configuration from the rear of the vehicle body. 7, symbol H1 indicates the protrusion amount of the protrusion 61 of the opposing surface 43r1, symbol H2 indicates the protrusion amount of the step 62, and symbol H3 indicates the protrusion amount (protrusion amount) of the reinforcing portion 60. These protrusion amounts H1, H2, and H3 indicate the protrusion amount (protrusion amount) from the surface of the opposing surface 43r1 located on the wheel 15w side (inner side in the vehicle width direction) to the opposite side of the wheel 15w, and can also be said to be the height of the protrusion 61, the step 62, and the reinforcing portion 60. The step 62 of this configuration constitutes at least a part of the step formed between a surface portion of the opposing surface 43r1 that is relatively closer to the wheel 15w (inner in the vehicle width direction) and a surface portion that corresponds to the protruding end of the protruding portion 61. As shown in Fig. 6, the boundary portion between the step 62 and the protruding portion 61 is formed into a shape that is cut into an oblique or curved surface. Therefore, the protruding amount H2 of the step 62 is smaller than the protruding amount H1 of the protruding portion 61.

[0024] In this configuration, the protrusion amount H2 of the step 62 is greater than the protrusion amount H3 of the reinforcing portion 60. However, this is not limited to this configuration, and the protrusion amount H2 of the step 62 may be changed as appropriate within a range in which the rotation stopping protrusion 52t can abut. 7 and 6, the gear case 43 has a release portion 71 into which at least the base portion 52a of the brake arm 52 enters. In Fig. 7, the range of the release portion 71 in the vehicle width direction is indicated by the symbol H0. 7, the protrusion 61 and the step 62 are located within a range H0 in the vehicle width direction of the open portion 71 when viewed from the rear of the vehicle body. Note that the range of the open portion 71 is schematically shown by a dashed line in FIG.

[0025] Since the protrusion amount H1 of the protrusion 61 is greater than the protrusion amount H2 of the step 62, the protrusion 61 can suppress movement of the brake arm 52 toward the wheel 15w without being restricted by the step 62. The protrusion amount H1 of the protrusion 61 may be set to an appropriate value within a range that can sufficiently prevent the brake shaft 51 from being pushed toward the wheel 15w.

[0026] Fig. 8 is a view showing the cross-sectional structure of the release portion 71 together with the surrounding configuration as seen from the side of the vehicle body, corresponding to an axial view of the brake shaft 51. Fig. 9 is a perspective view showing the gear case 43 alone, obliquely viewed from below on the left. 8 and 9, the release portion 71 is open widely toward the outside of the vehicle over a range corresponding to the range from the lower part of the vehicle body to the rear part of the vehicle body. As a result, the release portion 71 is released in the direction in which the arm portion 52b of the brake arm 52 extends, and does not interfere with the rotation of the brake arm 52. This is also advantageous in improving the degree of freedom in the shape of the brake arm 52 and improving workability around the brake arm 52.

[0027] The gear case 43 has a rear wall 72 that forms the wall on the far side of the release portion 71, and an insertion hole portion 73 that is recessed toward the front is provided in the rear wall 72. As shown in Figure 8, the insertion hole portion 73 is a bottomed hole into which at least a part of a biasing member 75 that biases the brake arm 52 in the direction opposite to the brake actuation direction (the γ direction shown in Figure 2) is inserted. The biasing member 75 is a coil spring, and its front end is inserted into the insertion hole 73 and its rear end is in contact with the brake arm 52. The symbol LA in Figures 8 and 9 indicates an axis passing through the center of the insertion hole 73. Note that the biasing member 75 is not limited to a coil spring as long as it can bias the brake arm 52 in the opposite direction to the brake actuation direction.

[0028] In this configuration, as shown in FIG. 8, the insertion hole portion 73 and the rear wall 72 of the release portion 71 are formed in a shape that opens along the axis LA of the insertion hole portion 73. Here, the shape that releases along the axis LA of the insertion hole portion 73 is not limited to a shape that releases in a direction that coincides with the axis LA of the insertion hole portion 73, but broadly includes a shape that releases in a direction within a predetermined angle (for example, within an acute angle range) relative to the axis LA. Furthermore, the insertion hole 73 and the rear wall 72 are formed in a tapered shape that gradually widens in the vertical direction toward the rear along the axis LA of the insertion hole 73 in a side view of the vehicle body. This makes it possible to obtain a draft angle that is suitable for withdrawing the slide mold from the release portion 71 when manufacturing the insertion hole 73 and the rear wall 72 of the release portion 71 using a slide mold. This makes it easier to withdraw the slide mold.

[0029] 8, of the protrusion 61 and the step 62 provided in the release portion 71, the one that protrudes more from the opposing surface 43r1 (the protrusion 61 in this configuration) is formed on the front side, opposite the direction in which the release portion 71 opens, compared to the one that protrudes less from the opposing surface 43r1 (the step 62 in this configuration). Therefore, when the protrusion 61 and the step 62 are manufactured using a slide mold in addition to the release portion 71, the slide mold can be easily pulled out along the axis LA of the insertion hole 73. Furthermore, as shown in FIG. 9, the protrusion 61 has a shape that tapers toward the opening direction of the insertion hole 73. Therefore, when molding the gear case 43, in the manufacturing process in which the release portion 71, the protrusion 61, and the step 62 are manufactured using a slide mold, the slide mold can be easily pulled out from the release portion 71.

[0030] The brake arm 52 of this configuration has a notch 52k (see Figure 8) formed by cutting out a portion of the base 52a through which the brake shaft 51 is inserted, and has a split clamping structure in which the brake shaft 51 is fixed by narrowing the gap of the notch 52k with a fastening member (fastening bolt in this embodiment) 80 (see Figures 8 and 9). 8, the brake arm 52 retracted to the brake non-operating position is indicated by a solid line, and the brake arm 52 moved to the brake operating position is indicated by a two-dot chain line. FIG. 8 also shows the movable range MR of the notch 52k associated with operation of the brake arm 52 (corresponding to operation from the brake non-operating position to the brake operating position). In this configuration, when viewed from the axial line of the brake shaft 51 shown in Fig. 8, the protrusion 61 is provided at a position that avoids the movable range MR of the notch 52k that occurs with the operation of the brake arm 52. Therefore, the notch 52k does not get caught on the protrusion 61, and the brake arm 52 can be operated smoothly.

[0031] As described above, the saddle-ride type vehicle 10 of this embodiment has the drum brake 50 provided on the inside of the wheel 15w of the wheel comprising the rear wheel 15, the brake shaft 51 extending from the drum brake 50 in one direction in the vehicle width direction, the brake arm 52 connected to the brake shaft 51 on one side of the drum brake 50 in the vehicle width direction, and the gear case 43 which is a case member arranged on one side of the drum brake 50 in the vehicle width direction. The gear case 43 has a gear case rear part 43r located between the brake arm 52 and the drum brake 50. The gear case rear part 43r has a reinforcing part 60 which is at least partially raised around a through hole 43h through which the brake shaft 51 passes, and has a protruding part 61 on an opposing surface 43r1 facing the brake arm 52 which protrudes beyond the reinforcing part 60 towards the brake arm 52.

[0032] With this configuration, even if an external force is generated that moves the brake arm 52 toward the wheel 15w, the protrusion 61 can prevent the brake arm 52 from moving toward the wheel 15w, thereby preventing the brake shaft 51 from being pushed toward the wheel 15w. This makes it possible to narrow the clearance between the brake shaft 51 and the wheel 15w, making it easier to make the rear vehicle body structure more compact in the vehicle width direction. The gear case 43 corresponds to an example of a "case member" in the present invention. The gear case rear portion 43r corresponds to an example of a "brake arm peripheral portion located between the brake arm 52 and the drum brake 50" in the present invention. The gear case rear portion 43r is a portion that holds the brake shaft 51, and therefore the gear case rear portion 43r can also be called a brake shaft holding portion or a brake cam holding portion.

[0033] The brake arm 52 also has a notch 52k formed by cutting out a portion of the base 52a through which the brake shaft 51 is inserted, and has a split clamping structure that fixes the brake shaft 51 by narrowing the gap between the notch 52k. The protrusion 61 is provided at a position that does not overlap with the movable range MR (see FIG. 8) of the notch 52k that occurs when the brake arm 52 is actuated, when viewed from the axial direction of the brake shaft 51. This configuration can prevent the notch 52k from getting caught on the protrusion 61, making it easier to operate the brake arm 52 smoothly.

[0034] The gear case 43 also has a release portion 71 into which at least a portion of the brake arm 52 enters and which releases in the direction in which the arm portion 52b of the brake arm 52 extends. The opposing surface 43r1 of the gear case 43 also has a step 62 provided around the through hole 43h. Furthermore, of the protrusion 61 and the step 62, the one that protrudes more from the surface of the gear case rear portion 43r is provided on the opposite side of the direction in which the release portion 71 releases than the one that protrudes less from the surface of the gear case rear portion 43r. According to these configurations, when molding the gear case 43, in the manufacturing process in which the release portion 71, the protrusion 61, and the step 62 are manufactured using a slide mold, the slide mold can be easily pulled out from the release portion 71.

[0035] In the present embodiment, the step 62 is exemplified as a step against which the rotation-stopping protrusion 52t of the brake arm 52 abuts, but is not limited to this. The position and protrusion amount of the step 62 may be changed as appropriate. For example, the step 62 may be changed to have a shape that protrudes more than the protrusion 61, so that the step 62 functions as a protrusion that protrudes further toward the brake arm 52 than the reinforcing portion 60 and the protrusion 61. This step 62 may suppress movement of the brake arm 52 toward the wheel 15w even when an external force that moves the brake arm 52 toward the wheel 15w is generated. Furthermore, if the step 62 is shaped to protrude more than the protrusion 61, it is preferable to position the step 62 on the opposite side of the protrusion 61 from the direction in which the release portion 71 is released so that the step 62 will not come into contact with the brake arm 52 even when the brake arm 52 moves toward the wheel 15w, and so as not to interfere with the withdrawal of the slide mold.

[0036] In addition, the release portion 71 has an insertion hole portion 73 into which at least a part of a biasing member 75 that biases the brake arm 52 in the opposite direction to the brake actuation direction is inserted, and is shaped to release along the axis LA of this insertion hole portion 73, and the protrusion portion 61 has a tapered shape toward the opening direction of the insertion hole portion 73. According to this configuration, when the open portion 71 including the insertion hole portion 73 is manufactured using a slide mold, the slide mold can be easily pulled out from the open portion 71.

[0037] Furthermore, part of the protruding portion 61 that protrudes from the gear case rear portion 43r also serves as a step 62 with which a rotation stopper projection 52t provided on the base portion 52a of the brake arm 52 abuts. With this configuration, the rotation stop function that restricts the rotation range of the brake arm 52 can be concentrated in the protrusion 61, which makes it possible to save space and simplify manufacturing compared to when the protrusion 61 and the step 62 are provided separately.

[0038] The protruding portion 61 protrudes from a part of the reinforcing portion 60, and the surface of the protruding portion of the protruding portion 61 is 、 Reinforcement portion 60 Other than the surface of the above-mentioned raised partIntersects with the surface and connected Therefore, it becomes easy to provide the protruding portion 61 having a desired protruding amount in a compact manner. Also, it becomes easy to make the surface of the raised portion of the protruding portion 61 into a surface suitable for contacting the rotation stopping protrusion 52t (the surface that constitutes the step 62).

[0039] The above-described embodiment merely shows one aspect of the present invention, and any modifications and applications are possible without departing from the spirit of the present invention. For example, the shape, position, and number of the protrusions 61 may be changed as appropriate. Also, a configuration without the step 62 may be used, or the shapes of the gear case 43 including the gear case rear portion 43r, the brake arm 52, and the like may be changed as appropriate. Also, a shape without the release portion 71 and not requiring the use of a slide mold may be used, for example, a shape without a case member covering the brake arm 52 from the outside in the vehicle width direction may be used, with the entire brake arm 52 exposed to the outside of the vehicle. Also, a fixing structure other than a split clamping structure may be used for fixing the brake arm 52 and the brake shaft 51.

[0040] Furthermore, although the present invention has been described as being applied to a vehicle rear structure having drum brakes 50 on rear wheels 15, it may also be applied to a vehicle front structure having drum brakes on front wheels 13. In other words, the present invention is not limited to being applied to the vehicle structure of saddle-ride type vehicle 10 shown in Fig. 1, but may be applied to the vehicle structure of any saddle-ride type vehicle or the vehicle structure of a vehicle other than a saddle-ride type vehicle. For example, vehicles to which the present invention is applicable are not limited to electric vehicles using a motor 12 as a power unit, but may also be vehicles using an internal combustion engine as a power unit, and there are no restrictions on the type or number of power units.

[0041] Furthermore, in the above embodiment, the brake arm peripheral portion located between the brake arm 52 and the drum brake 50 is the rear gear case 43r that holds the brake shaft 51, but the present invention is not limited to this. For example, a case member other than the rear gear case 43r may constitute the brake arm peripheral portion located between the brake arm 52 and the drum brake 50, and this brake arm peripheral portion may have a reinforcing portion 60 in which at least a portion around the through hole 43h through which the brake shaft 51 passes is raised, and a protruding portion 61 that protrudes beyond the reinforcing portion 60 toward the brake arm 52 may be formed on the opposing surface 43r1 that faces the brake arm 52.

[0042] [Configuration supported by the above embodiment] The above embodiment supports the following configurations.

[0043] (Configuration 1) A vehicle structure including a drum brake provided on the inside of a wheel, a brake shaft extending from the drum brake in one direction in the vehicle width direction, a brake arm connected to the brake shaft on one side of the drum brake in the vehicle width direction, and a case member arranged on one side of the drum brake in the vehicle width direction, the case member has a brake arm peripheral portion located between the brake arm and the drum brake, the brake arm peripheral portion has a reinforcing portion in which at least a part of the periphery of a through hole through which the brake shaft passes is raised, and the reinforcing portion is provided on an opposing surface facing the brake arm, facing the brake arm. Club Vehicle structure having a protruding portion that protrudes further. With this configuration, even if an external force acts to move the brake arm toward the wheel, the protrusion prevents the brake arm from moving toward the wheel, thereby preventing the brake shaft from being pushed toward the wheel.

[0044] (Configuration 2) A vehicle structure as described in Configuration 1, wherein the brake arm has a notch formed by cutting out a portion of the base through which the brake shaft is inserted, and has a split clamping structure that fixes the brake shaft by narrowing the spacing of the notch, and the protrusion is provided in a position that does not overlap with the range of movement of the notch that occurs when the brake arm is operated, when viewed along the axis of the brake shaft. This configuration can prevent the notch from getting caught on the protrusion.

[0045] (Configuration 3) The case member has a release portion into which at least a portion of the brake arm enters and which releases in a direction in which the arm portion of the brake arm extends, and the opposing surface of the peripheral portion of the brake arm has a step provided around the through hole, The step is a part of the protrusion, and the step is not included. the protrusion Part and 、 A vehicle structure as described in configuration 1 or 2, wherein the step that protrudes more from the surface of the peripheral portion of the brake arm is located on the opposite side of the direction in which the release portion is released than the step that protrudes less from the surface. According to this configuration, when molding the case member, in the manufacturing process in which the release portion, protrusion, and step are manufactured using a slide mold, the slide mold can be easily pulled out from the release portion.

[0046] (Configuration 4) The release portion has an insertion hole into which at least a part of a biasing member that biases the brake arm in the opposite direction to the brake actuation direction is inserted, and the release portion has a shape that releases along the axis of the insertion hole, and the protrusion has a shape that tapers toward the opening direction of the insertion hole. Vehicle structure . According to this configuration, when the open portion including the insertion hole portion is manufactured using a slide mold, the slide mold can be easily pulled out from the open portion.

[0047] (Configuration 5) A vehicle structure described in any one of configurations 1 to 4, wherein a portion of the protruding portion that protrudes from the periphery of the brake arm is a step against which a rotation-stopping protrusion provided at the base of the brake arm abuts. According to this configuration, the function of preventing rotation, which restricts the rotation range of the brake arm, can be concentrated in the protrusion.

[0048] (Configuration 6) The protruding portion protrudes from a part of the reinforcing portion, and the surface of the protruding portion is 、 The reinforcing portion The rest of the surface except for the surface of the raised portion Intersects with the surface and connected 6. A vehicle structure according to any one of claims 1 to 5. This configuration makes it easy to provide a compact protrusion having a desired protrusion amount, and also makes it easy to make the surface of the raised portion of the protrusion suitable for contact with the rotation-stopping protrusion. [Explanation of symbols]

[0049] 10 Saddle-type vehicle 13 Front wheel (wheel) 15 Rear wheel (wheel) 16 Swing arm (case component) 43 Gear case (case material) 43h through hole 43r Rear of gear case (around the brake arm) 43r1 Opposite surface 50 drum brake 51 Brake shaft 52 Brake arm 52a Brake arm base 52b Brake arm arm 52k notch 60 Reinforcement 71 Liberation Department 75 biasing member 80 Fastening members 73 Insertion hole LC vehicle width center LA Axis of insertion hole

Claims

1. A drum brake (50) provided on the inside of the wheel (15w); a brake shaft (51) extending from the drum brake (50) in one direction in the vehicle width direction; a brake arm (52) connected to the brake shaft (51) on one side of the drum brake (50) in the vehicle width direction; a case member (43) disposed on one side of the drum brake (50) in the vehicle width direction, The case member (43) has a brake arm peripheral portion (43r) located between the brake arm (52) and the drum brake (50), The brake arm peripheral portion (43r) has a reinforcing portion (60) in which at least a part of the periphery of the through hole (43h) through which the brake shaft (51) passes is raised, and has a protruding portion (61) that protrudes further than the reinforcing portion (60) toward the brake arm (52) in a portion of an opposing surface (43r1) facing the brake arm (52) that overlaps with the brake arm (52) when viewed from the vehicle width direction. Vehicle structure.

2. The brake arm (52) has a notch (52k) formed by cutting out a part of a base (52a) through which the brake shaft (51) is inserted, and has a split clamping structure that fixes the brake shaft (51) by narrowing the interval of the notch (52k). The protrusion (61) is provided at a position that does not overlap with a movable range (MR) of the notch (52k) caused by the operation of the brake arm (52) when viewed from the axial line of the brake shaft (51). The vehicle structure according to claim 1 .

3. The case member (43) has a release portion (71) into which at least a part of the brake arm (52) enters and which releases in a direction in which the arm portion (52b) of the brake arm (52) extends, The opposing surface (43r1) of the brake arm peripheral portion (43r) has a step (62) provided around the through hole (43h), The step (62) is a part of the protrusion (61), The part of the protruding portion (61) excluding the step (62) and the step (62) that protrudes more from the surface of the brake arm peripheral portion (43r) are provided on the opposite side of the releasing direction of the release portion (71) than the part of the step (62) that protrudes less from the surface. The vehicle structure according to claim 1 .

4. the release portion (71) has an insertion hole portion (73) into which at least a part of a biasing member (75) that biases the brake arm (52) in the opposite direction to the brake actuation direction is inserted, and is shaped to be released along an axis (LA) of the insertion hole portion (73), The protrusion (61) has a tapered shape toward the opening direction of the insertion hole (73). The vehicle structure according to claim 3 .

5. A part of the protruding portion (61) protruding from the brake arm peripheral portion (43r) is a step (62) against which a rotation stop projection (52t) provided on the base (52a) of the brake arm (52) abuts. A vehicle structure according to any one of claims 1 to 4.

6. The protrusion (61) protrudes from a part of the reinforcing part (60), and the surface of the protrusion (61) at the protruding part and the other surface of the reinforcing part (60) excluding the surface of the protruding part are connected to each other in an intersecting manner. A vehicle structure according to any one of claims 1 to 4.

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