Straddle-riding vehicle and brake piping structure thereof

Abstract

The invention relates to a straddle-riding vehicle and a brake piping structure of the straddle-riding vehicle. The brake piping structure is applied to the straddle-riding vehicle, the straddle-riding vehicle comprises a frame and a silencer fixed to the frame, the brake piping structure comprises a brake piping and a protection part, the silencer is located above the brake piping and inclines to the brake piping, and the protection part is fixed to the frame; the protection part is located between the silencer and the brake piping, and the protection part at least covers the position, closest to the brake piping, of the silencer. The protection part is located between the silencer and the brake piping, and the protection part at least can conduct blocking at the position closest to the silencer and the brake piping so as to reduce heat radiation of the silencer to the brake piping, so that the brake piping is effectively protected, and the situation that the brake piping is damaged due to heat, and consequently brake failure is caused is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of cross - riding vehicles, and particularly to a cross - riding vehicle and its brake pipe structure. Background Art

[0002] A cross - riding vehicle includes a frame, a brake oil tank, wheels, an exhaust system, and brake pipes. The exhaust system includes an exhaust pipe and a muffler connected in sequence. Since the exhaust pipe is used to discharge high - temperature gases, the temperature of the muffler connected to the exhaust pipe is also relatively high. The brake pipes are used to connect the brake oil tank to the brake calipers on the wheels. During braking, the oil in the brake oil tank flows through the brake pipes to the brake calipers in a hydraulic supply manner to drive the brake calipers to brake the wheels.

[0003] In related technologies, the distance between the muffler and the brake pipes is relatively close, and the brake pipes are made of rubber. The high - temperature muffler easily causes the brake pipes to be damaged by heat, and further leads to brake failure. Summary of the Invention

[0004] Based on this, it is necessary to provide a cross - riding vehicle and its brake pipe structure for the problem that the high - temperature muffler easily causes the brake pipes to be damaged by heat.

[0005] A brake pipe structure is applied to a cross - riding vehicle. The cross - riding vehicle includes a frame and a muffler fixed on the frame. The brake pipe structure includes a brake pipe and a protective member. The muffler is located above the brake pipe and is inclined with respect to the brake pipe. The protective member is fixed on the frame;

[0006] The protective member is located between the muffler and the brake pipe, and the protective member at least covers the position on the muffler that is closest to the brake pipe.

[0007] In one embodiment, the protective member is a protective plate. The protective plate at least includes a first protective section and a second protective section. The first protective section and the second protective section are arranged at an angle, and the two ends of the first protective section and the second protective section that are far away from each other are respectively fixedly connected to the frame.

[0008] In one embodiment, the heights of the two ends of the first protective section and the second protective section that are far away from each other are different.

[0009] In one embodiment, the protective plate includes a third protective section. The third protective section is arranged between the first protective section and the second protective section. The third protective section has an arc structure, and the arc structure at least surrounds the outside of the position on the muffler that is closest to the brake pipe.

[0010] In one embodiment, at least a part of the second protection section is located between the muffler and the brake pipe;

[0011] Along the direction from the first protection section to the second protection section, the width of the first protection section gradually increases; along the direction from the second protection section to the first protection section, the width of the second protection section gradually increases;

[0012] The width of the third protection section is greater than or equal to the maximum width of the first protection section and greater than or equal to the maximum width of the second protection section.

[0013] In one embodiment, reinforcing ribs are provided on the third protection section, one end of the reinforcing rib extends to the first protection section, and the other end extends to the second protection section.

[0014] In one embodiment, along the direction from the first protection section to the second protection section, a plurality of through holes are successively formed on the first protection section;

[0015] And along the direction from the first protection section to the second protection section, the sizes of the plurality of through holes gradually increase.

[0016] A cross-riding vehicle includes a frame, a brake fuel tank, wheels, a muffler, and a brake pipe structure. The muffler is fixed on the frame. One end of the brake pipe is connected to the brake fuel tank, and the other end is connected to a brake caliper on the wheel. The muffler is located above the brake pipe.

[0017] In one embodiment, the muffler includes a first muffling section and a second muffling section connected end to end, and the connection position of the first muffling section and the second muffling section is the closest to the brake pipe.

[0018] In one embodiment, the cross-riding vehicle includes a wheel and a swing arm. One end of the swing arm is rotatably connected to the frame, and the other end is fixedly connected to the rotating shaft of the wheel. The brake pipe is fixed on the swing arm and is located on the side of the swing arm close to the muffler.

[0019] In the above-mentioned cross-riding vehicle and its brake pipe structure, the protective member is located between the muffler and the brake pipe, and the protective member can at least block at the position where the muffler and the brake pipe are closest to reduce the heat radiation of the muffler to the brake pipe, thereby effectively protecting the brake pipe and preventing the brake pipe from being damaged by heat and causing brake failure. Description of the Drawings

[0020] Figure 1 It is a partial structural schematic diagram of a cross-riding vehicle in one embodiment.

[0021] Figure 2 In an embodiment Figure 1 is a schematic structural diagram of part A in

[0022] Figure 3 In an embodiment Figure 1 is a schematic structural diagram in the B-B direction.

[0023] Figure 4 is a schematic structural diagram of a protective plate in an embodiment.

[0024] Reference numerals: 10, vehicle frame; 20, muffler; 21, first muffling section; 22, second muffling section; 23, connection position; 30, rocker arm; 31, fixed section; 32, movable section; 40, wheel; 50, brake oil tank; 100, protective member; 110, first protective section; 111, through hole; 112, first end; 120, second protective section; 121, second end; 130, third protective section; 131, reinforcing rib; 200, brake pipe. Detailed Description of the Invention

[0025] In order to make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present application.

[0027] In addition, if terms such as "first" and "second" appear, these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In this application, unless otherwise clearly specified and defined, if there is a description such as the first feature being "on" or "under" the second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0031] Refer to Figures 1-3 , a brake pipe structure provided by an embodiment of this application is applied to a cross-riding vehicle. The cross-riding vehicle includes a frame 10 and a muffler 20 fixed on the frame 10. The brake pipe structure includes a brake pipe 200 and a protective member 100. The muffler 20 is located above the brake pipe 200 and is inclined to the brake pipe 200. The protective member 100 is fixed on the frame 10; the protective member 100 is located between the muffler 20 and the brake pipe 200, and the protective member 100 at least covers the position on the muffler 20 closest to the brake pipe 200.

[0032] In this embodiment, one end of the muffler 20 is connected to the engine of the cross-riding vehicle, and the other end is fixed to the frame 10. The high-temperature exhaust gas generated by the internal combustion in the engine first enters the exhaust pipe, then enters the muffler 20 through the exhaust pipe, and finally is discharged after being muffled by the muffler 20. The brake pipe 200 is used to connect the brake oil tank 50 and the brake caliper on the wheel 40. During braking, the oil in the brake oil tank 50 flows through the brake pipe 200 by means of hydraulic supply to drive the brake caliper to brake the wheel 40. The brake pipe 200 is located at the bottom of the muffler 20, and both are generally extended along the length direction of the cross-riding vehicle, but there is a certain relative inclination angle between them. Therefore, there is a position where the distance between the brake pipe 200 and the muffler 20 is the shortest. At this position, the heat radiation of the muffler 20 to the brake pipe 200 is the most serious. Therefore, the protective member 100 at least covers the position on the muffler 20 that is closest to the brake pipe 200.

[0033] The protective member 100 is located between the muffler 20 and the brake pipe 200, and the protective member 100 can at least block at the position where the distance between the muffler 20 and the brake pipe 200 is the shortest to reduce the heat radiation of the muffler 20 to the brake pipe 200, thereby effectively protecting the brake pipe 200 and preventing the brake pipe 200 from being damaged by heat and causing brake failure. Among them, the protective member 100 can be a protective plate or a protective block. The protective member 100 can be made of stainless steel, aluminum alloy or high-temperature resistant plastic material.

[0034] Combined Figure 3 and Figure 4 , in some embodiments, the protective member 100 is a protective plate, and the protective plate at least includes a first protection section 110 and a second protection section 120. The first protection section 110 and the second protection section 120 are arranged at an angle, and the two ends of the first protection section 110 and the second protection section 120 that are away from each other are respectively fixedly connected to the frame 10.

[0035] In this embodiment, the protective plate includes a first protection section 110 and a second protection section 120. The first protection section 110 and the second protection section 120 are arranged at an angle, which is convenient for the two ends of the first protection section 110 and the second protection section 120 that are away from each other to be respectively fixed on the frame 10.

[0036] Furthermore, the angle between the first protection section 110 and the second protection section 120 can be any angle between 0° and 180°. Taking the angle between the first protection section 110 and the second protection section 120 as 90° as an example, at this time, the first protection section 110 and the second protection section 120 form an L-shaped structure. The second protection section 120 is located between the muffler 20 and the brake pipe 200 and is used to isolate the muffler 20 and the brake pipe 200. The first protection section 110 extends from the second protection section 120 towards the vehicle frame 10 so that both ends of the protection plate can be fixedly connected to the vehicle frame 10.

[0037] Specifically, the first protection section 110 and the second protection section 120 are integrally manufactured. That is, a single sheet of material can be bent at a certain angle in the middle to form the first protection section 110 and the second protection section 120. Or after separately producing the first protection section 110 and the second protection section 120, the first protection section 110 and the second protection section 120 are connected by welding or screw connection.

[0038] Of course, in other embodiments, the protection plate includes a third protection section. The first protection section, the second protection section, and the third protection section are connected in sequence to form a U-shaped structure. One end of the first protection section away from the second protection section is connected to the vehicle frame, and one end of the third protection section away from the second protection section is connected to the vehicle frame. The protection plate is in a U-shaped structure to surround the part of the muffler 20 closest to the brake pipe 200, thereby enhancing the isolation effect on heat radiation.

[0039] Combined Figure 2 and Figure 3 , in some embodiments, the heights of the two ends of the first protection section 110 and the second protection section 120 that are away from each other are different.

[0040] In this embodiment, the first protection section 110 has a first end 112 away from the second protection section 120, and the second protection section 120 has a second end 121 away from the first protection section 110. The first end 112 and the second end 121 are respectively fixedly connected to the vehicle frame 10, and the first end 112 and the second end 121 are at different heights. That is, when installing the first end 112 and the second end 121 from the side of the cross-riding vehicle, the first end 112 will not block the second end 121, and the second end 121 will not block the first end 112, which is convenient for the installation of the protection plate. The first end 112 and the second end 121 are respectively connected to the vehicle frame by screws or welding.

[0041] Combined Figure 4 , in some embodiments, the protection plate includes a third protection section 130. The third protection section 130 is arranged between the first protection section 110 and the second protection section 120, and the third protection section 130 is in an arc structure, and the arc structure at least surrounds the outside of the position of the muffler 20 closest to the brake pipe 200.

[0042] In this embodiment, the arc structure at least surrounds the position on the muffler 20 closest to the brake pipe 200, that is, the arc structure can adapt to the outer wall of the cylindrical muffler 20, so as to ensure the heat radiation blocking effect on the muffler 20 while reducing the length of the protection plate. One end of the arc structure is connected to the vehicle frame 10 through the first protection section 110, and the other end is connected to the vehicle frame 10 through the second protection section 120.

[0043] It should be noted that there is a gap between the arc structure and the muffler 20 to prevent the protection plate and the muffler 20 from rubbing against each other due to vehicle vibration during vehicle driving, damaging the muffler 20.

[0044] Among them, the first protection section 110, the second protection section 120 and the third protection section 130 can be integrally formed, or after the first protection section 110, the second protection section 120 and the third protection section 130 are respectively formed, the first protection section 110 is welded to the second protection section 120, and the second protection section 120 is welded to the third protection section 130.

[0045] In some embodiments, at least part of the second protection section 120 is located between the muffler 20 and the brake pipe 200; along the direction from the first protection section 110 to the second protection section 120, the width of the first protection section 110 gradually increases; along the direction from the second protection section 120 to the first protection section 110, the width of the second protection section 120 gradually increases; the width of the third protection section 130 is greater than or equal to the maximum width of the first protection section 110 and greater than or equal to the maximum width of the second protection section 120.

[0046] In this embodiment, the second protection section 120 is located between the muffler 20 and the brake pipe 200 and is used to block the muffler 20 and the brake pipe 200 together with the arc structure, and the first protection section 110 is used to connect the arc structure away from the second protection section 120 to the vehicle frame 10.

[0047] The width of the third protection section 130 is greater than or equal to the maximum width of the first protection section 110 and greater than or equal to the maximum width of the second protection section 120, that is, the width of the third protection section 130 is the largest, which is used to ensure the heat radiation blocking effect of the muffler 20 on the brake pipe 200. Along the direction from the first protection section 110 to the second protection section 120, the width of the first protection section 110 gradually increases; along the direction from the second protection section 120 to the first protection section 110, the width of the second protection section 120 gradually increases, that is, the width of the parts of the first protection section 110 and the second protection section 120 close to the third protection section 130 is the largest, which is used to ensure the heat isolation effect; while the widths of the ends of the first protection section 110 and the second protection section 120 far away from each other are the smallest, which is used to play a role in weight reduction.

[0048] Further, reinforcing ribs 131 are provided on the third protection section 130. One end of the reinforcing rib 131 extends to the first protection section 110, and the other end extends to the second protection section 120.

[0049] That is, the reinforcing rib 131 connects the first protection section 110, the third protection section 130, and the second protection section 120 simultaneously, and is used to improve the strength of the entire protection plate.

[0050] In some embodiments, along the direction from the first protection section 110 to the second protection section 120, a plurality of through holes 111 are sequentially formed on the first protection section 110; along the direction from the first protection section 110 to the second protection section 120, the sizes of the plurality of through holes 111 gradually increase.

[0051] In this embodiment, along the direction from the first protection section 110 to the second protection section 120, a plurality of through holes 111 are sequentially formed on the first protection section 110 to reduce the weight of the protection plate. And along the direction from the first protection section 110 to the second protection section 120, the width of the first protection section 110 gradually increases. Correspondingly, the sizes of the through holes 111 also gradually increase, so as to play a role in weight reduction while ensuring the connection strength. Specifically, the through holes 111 are circular through holes. Of course, they can also be through holes of other shapes, which are not limited herein.

[0052] In some embodiments, a heat insulation layer is provided on the side of the protection plate close to the muffler to further enhance the heat insulation effect of the protection plate. Among them, the heat insulation layer is made of ceramic fiber, glass fiber, and high-temperature heat insulation cotton. Of course, a heat insulation layer can also be provided on the side of the protection plate close to the brake pipe 200, which can also play a good heat insulation role.

[0053] An embodiment of the present application provides a straddle vehicle, which includes a frame 10, a brake fuel tank, wheels 40, a muffler 20, and a brake pipe structure. The muffler 20 is fixed on the frame 10. One end of the brake pipe 200 is connected to the brake fuel tank, and the other end is connected to a brake caliper on the wheel 40. The muffler 20 is located above the brake pipe 200.

[0054] In this embodiment, one end of the muffler 20 is connected to the engine of the cross-riding vehicle, and the other end is fixed to the frame 10. The high-temperature exhaust gas generated by the internal combustion in the engine first enters the exhaust pipe, then enters the muffler 20 through the exhaust pipe, and finally is discharged after being silenced by the muffler 20. One end of the brake pipe 200 is connected to the brake oil tank, and the other end is connected to the brake caliper on the wheel 40. When braking, the oil in the brake oil tank flows through the brake pipe 200 by means of hydraulic supply to drive the brake caliper to brake the wheel 40, that is, both extend along the length direction of the cross-riding vehicle. The muffler 20 is located above the brake pipe 200, that is, the position of the muffler 20 is relatively high, which can prevent the bottom of the muffler 20 from rubbing against the ground when the cross-riding vehicle is driving on a mountain, damaging the muffler 20.

[0055] The protective member 100 is located between the muffler 20 and the brake pipe 200, and the protective member 100 can at least block at the position where the muffler 20 and the brake pipe 200 are closest to each other to reduce the heat radiation of the muffler 20 to the brake pipe 200, thereby effectively protecting the brake pipe 200 and preventing the brake pipe 200 from being damaged by heat, resulting in brake failure.

[0056] Specifically, the cross-riding vehicle of the present application can be an off-road cross-riding vehicle.

[0057] In some embodiments, the muffler 20 includes a first muffling section 21 and a second muffling section 22 connected end to end, and the connection position 23 of the first muffling section 21 and the second muffling section 22 is the closest to the brake pipe 200.

[0058] In this embodiment, the muffler 20 includes a first muffling section 21 and a second muffling section 22 connected end to end. When installing, first install the first muffling section 21, and then connect the second muffling section 22 to the tail of the first muffling section 21. However, due to the space limitation of the entire cross-riding vehicle, the connection position 23 of the first muffling section 21 and the second muffling section 22 is the closest to the brake pipe 200. Both ends of the protective plate are respectively connected to the frame 10, and the protective plate covers the connection position 23 of the first muffling section 21 and the second muffling section 22.

[0059] In some embodiments, the cross-riding vehicle includes a wheel 40 and a swing arm 30. One end of the swing arm 30 is rotatably connected to the frame 10, and the other end is fixedly connected to the rotating shaft of the wheel 40. The brake pipe 200 is fixed on the swing arm 30 and is located on the side of the swing arm 30 close to the muffler 20.

[0060] In this embodiment, one end of the rocker arm 30 is rotatably connected to the vehicle frame 10, and the other end is fixedly connected to the rotating shaft of the wheel 40, which is used to connect the vehicle frame 10 and the wheel 40, transfer the weight of the vehicle to the wheel 40 through the rocker arm 30, and at the same time bear various forces received by the wheel 40 during driving and transfer these forces to the vehicle frame 10. In addition, the rocker arm 30 can realize the suspension function of the vehicle. When the vehicle is driving on an uneven road surface, the rocker arm 30 can rotate around the connection point with the vehicle frame 10, enabling the wheel 40 to move up and down according to the road surface conditions, allowing the shock absorption system to function, absorbing and buffering the impact from the road surface, thereby ensuring the stability and comfort of the vehicle during driving and reducing the bumps suffered by the rider.

[0061] Specifically, the rocker arm 30 includes a fixed section 31 and a movable section 32 that are rotatably connected end to end. One end of the fixed section 31 away from the movable section 32 is fixedly connected to the rotating shaft of the wheel 40, and one end of the movable section 32 away from the fixed section 31 is rotatably connected to the vehicle frame 10; the brake pipe 200 is fixed on the fixed section 31 through a sleeve, which can ensure the stable connection of the brake pipe 200.

[0062] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0063] The above-described embodiments merely represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A brake pipe structure is applied to a straddle vehicle, and the straddle vehicle includes a frame (10) and a muffler (20) fixed on the frame (10), characterized in that, The brake pipe structure includes a brake pipe (200) and a protective member (100). The muffler (20) is located above the brake pipe (200) and is inclined to the brake pipe (200), and the protective member (100) is fixed to the vehicle frame (10). The protective member (100) is located between the muffler (20) and the brake pipe (200), and the protective member (100) at least covers the position on the muffler (20) that is closest to the brake pipe (200).

2. The brake pipe structure according to claim 1, wherein The protective member (100) is a protective plate, and the protective plate at least includes a first protective section (110) and a second protective section (120). The first protective section (110) and the second protective section (120) are arranged at an angle, and the two ends of the first protective section (110) and the second protective section (120) that are away from each other are respectively fixedly connected to the vehicle frame (10).

3. The brake pipe structure according to claim 2, characterized in that The heights of the two ends of the first protective section (110) and the second protective section (120) that are away from each other are different.

4. The brake pipe structure according to claim 2, characterized in that, The protective plate includes a third protective section (130). The third protective section (130) is arranged between the first protective section (110) and the second protective section (120). The third protective section (130) has an arc structure, and the arc structure at least encloses the position on the muffler (20) that is closest to the brake pipe (200).

5. The brake pipe structure according to claim 4, characterized in that, At least a part of the second protective section (120) is located between the muffler (20) and the brake pipe (200). Along the direction from the first protective section (110) to the second protective section (120), the width of the first protective section (110) gradually increases; along the direction from the second protective section (120) to the first protective section (110), the width of the second protective section (120) gradually increases. The width of the third protective section (130) is greater than or equal to the maximum width of the first protective section (110) and greater than or equal to the maximum width of the second protective section (120).

6. The brake pipe structure according to claim 5, characterized in that, Reinforcing ribs (131) are provided on the third protective section (130). One end of the reinforcing rib (131) extends to the first protective section (110), and the other end extends to the second protective section (120).

7. The brake pipe structure according to claim 4, characterized in that, Along the direction from the first protective section (110) to the second protective section (120), a plurality of through holes (111) are successively formed in the first protective section (110). And along the direction from the first protective section (110) to the second protective section (120), the sizes of the plurality of through holes (111) gradually increase.

8. A straddle-type vehicle, characterized in that, The cross-riding vehicle includes a vehicle frame (10), a brake fuel tank (50), a wheel (40), a muffler (20), and the brake pipe structure according to any one of claims 1-7. The muffler (20) is fixed to the vehicle frame (10). One end of the brake pipe (200) is connected to the brake fuel tank (50), and the other end is connected to a brake caliper on the wheel (40). The muffler (20) is located above the brake pipe (200).

9. The straddle-type vehicle according to claim 8, wherein, The muffler (20) includes a first muffling section (21) and a second muffling section (22) connected end to end, and a connection position (23) between the first muffling section (21) and the second muffling section (22) is closest to the brake pipe (200).

10. The straddle-type vehicle according to claim 8, wherein The cross-riding vehicle includes a wheel (40) and a swing arm (30). One end of the swing arm (30) is rotatably connected to the frame (10), and the other end is fixedly connected to a rotating shaft of the wheel (40). The brake pipe (200) is fixed on the swing arm (30) and is located on a side of the swing arm (30) close to the muffler (20).

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