Motorcycle

Abstract

The application provides a motorcycle, which comprises a frame, a suspension system, an engine and a running system; the suspension system comprises a rear fork and a chain guard, the rear fork is connected with the frame, and the chain guard is installed on the rear fork; the engine is supported by the frame; the running system comprises a rear wheel, the rear wheel is connected with the rear fork and is in driving connection with the engine through a chain; the rear fork comprises a pair of fork arms distributed along the width direction of the frame and a fork cross beam arranged between the pair of fork arms, the fork cross beam has a sunken part connected with the fork arms, at least part of the chain guard is installed on the sunken part and is located between the chain and the sunken part, and the chain guard overlaps the fork arms in the width direction of the motorcycle. Through the above arrangement, the size of the rear fork is smaller, the weight of the whole vehicle is reduced, and the wear of the chain is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle engineering, and more particularly to a motorcycle. Background Technology

[0002] The rear wheel of a motorcycle is connected to the engine drive via a chain, and the rear wheel is connected to the frame via a rear swingarm. The upper part of the chain is located above the rear swingarm, and a chain guard is installed between the chain and the rear swingarm to prevent direct contact between the chain and the rear swingarm. When the motorcycle is moving, the chain and the chain guard will rub against each other. Under some more aggressive driving conditions, such as when the vehicle is riding on uneven roads, the chain will jump up and down, causing the chain and chain guard to collide and exacerbate wear on both. Over time, this seriously affects the lifespan of the chain and poses a significant safety hazard. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of this application is to provide a motorcycle with less wear on the chain and chain guard.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] A motorcycle includes a frame, a suspension system, an engine, and a running gear; the suspension system includes a rear swingarm and a chain guard, the rear swingarm being connected to the frame and the chain guard being mounted on the rear swingarm; the engine is supported by the frame; the running gear includes a rear wheel, the rear wheel being connected to the rear swingarm and being driven by the engine via a chain; the rear swingarm includes a pair of swingarm arms distributed along the width direction of the motorcycle and a swingarm crossbeam disposed between the pair of swingarm arms, the swingarm crossbeam having a recessed portion connected to the swingarm arms, and at least a portion of the chain guard being mounted on the recessed portion and located between the chain and the recessed portion.

[0006] Furthermore, observing along the width of the motorcycle, the chain guard overlaps with the flat fork arm.

[0007] Furthermore, both the recessed portion and the flat fork arm have opposing upper and lower surfaces. The upper surface of the recessed portion has a first height difference with the upper surface of the flat fork arm, and the lower surface of the recessed portion has a second height difference with the lower surface of the flat fork arm. The range of both the first and second height differences is 6mm to 8mm.

[0008] Furthermore, the chain guard includes a first guard and a second guard connected together. The first guard is located in front of the second guard, and a gap is formed between the first guard and the upper surface of the recessed part. The second guard is in contact with the upper surface of the recessed part.

[0009] Furthermore, a limiting part is provided on the side of the second guard facing the lower part. The lower part has a limiting hole that extends through itself along the height direction of the motorcycle. The limiting part passes through the limiting hole and limits the limiting part in its radial and axial directions.

[0010] Furthermore, a protrusion is provided on the side of the first guard facing the sunken part, and the first guard abuts against the sunken part through the protrusion.

[0011] Furthermore, the chain guard includes a support part and a friction part. The support part is connected to the sinking part, and the friction part is located on the side of the support part away from the sinking part. The friction part can contact the chain. When viewed along the width direction of the motorcycle, the thickness of the friction part of the first guard is greater than the thickness of the friction part of the second guard.

[0012] Furthermore, the friction part of the second guard has an arc-shaped upper edge.

[0013] Furthermore, the motorcycle also includes a braking system, which includes a caliper bracket, a brake caliper, and a brake disc. The brake disc is connected to the rear wheel, and the brake caliper is connected to the rear swingarm via the caliper bracket. The suspension system includes a limiting member, which is fixedly connected to the rear swingarm and located on the side of the rear swingarm facing the rear wheel. The caliper bracket is slidably connected to the limiting member, and at least a portion of the limiting member abuts against the caliper bracket and limits the caliper bracket in the width direction of the motorcycle.

[0014] Furthermore, the limiting member includes a locking part and a connecting part. The locking part is connected to the rear swingarm via the connecting part. The length of the locking part extending along the height direction of the motorcycle is defined as a first length, and the length of the connecting part extending along the height direction of the motorcycle is defined as a second length. The first length is greater than the second length.

[0015] The motorcycle provided in this application has a recessed section on the swingarm beam, and the chain guard is installed in the recessed section. When viewed along the width direction of the motorcycle, the chain guard overlaps with the swingarm arm, which can effectively reduce the wear of the chain guard caused by inertial jumping of the chain under high speed conditions. In addition, the recessed section can reduce the weight of the rear swingarm without affecting the appearance of the rear swingarm. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the motorcycle in the embodiments of this application;

[0017] Figure 2 This is a schematic diagram of the motorcycle frame structure in the embodiments of this application;

[0018] Figure 3 This is a partial structural diagram of the motorcycle suspension system in the embodiments of this application;

[0019] Figure 4 This is a side cross-sectional view of the rear swingarm of the motorcycle in the embodiment of this application;

[0020] Figure 5 This is a partial structural diagram of the braking system of a motorcycle according to an embodiment of this application;

[0021] Figure 6 This is a first schematic diagram of the cooperation between the limiting member and the caliper bracket of the motorcycle in the embodiments of this application;

[0022] Figure 7 This is a second schematic diagram showing the cooperation between the limiting member and the caliper bracket of the motorcycle in the embodiments of this application;

[0023] Figure 8 This is a third schematic diagram of the motorcycle's limiting member cooperating with the caliper bracket in the embodiments of this application;

[0024] Figure 9 This is an exploded view of the front cover and lighting system of the motorcycle in the embodiments of this application;

[0025] Figure 10 This is a schematic diagram of the front cover and lighting system of a motorcycle according to an embodiment of this application from a first-view perspective;

[0026] Figure 11 This is a schematic diagram of the front cover and lighting system of a motorcycle according to an embodiment of this application from a second perspective. Detailed Implementation

[0027] To clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the content described below is only one embodiment of the present invention. For those skilled in the art, all other embodiments obtained without creative effort are within the protection scope of the present invention.

[0028] like Figure 1 As shown, this application provides a motorcycle 100, which includes a frame 11, a body panel 12, a suspension system 13, a running gear 14, and a powertrain 15. At least a portion of the body panel 12 covers the frame 11, and at least a portion of the running gear 14 is located below the frame 11 and connected to the frame 11 via the suspension system 13. The running gear 14 includes a front wheel 141 and a rear wheel 142, and the powertrain 15 is supported by the frame 11 and is drive-connected to the rear wheel 142.

[0029] For ease of description, the following are also defined: Figure 1The motorcycle 100 is shown in the front-back, left-right, and up-down directions. In the description of this application, the length direction of the motorcycle 100 refers to the front-back direction, the width direction refers to the left-right direction, and the height direction refers to the up-down direction.

[0030] like Figure 2 As shown, the frame 11 includes a main frame 111 distributed substantially along the length of the motorcycle 100 and a subframe 112 located behind the main frame 111. The subframe 112 extends in a direction substantially the same as the main frame 111, that is, it extends substantially along the length of the motorcycle 100. The motorcycle 100 also includes a support bracket 113 extending substantially along the height of the motorcycle 100. The support bracket 113 is at least partially located between the main frame 111 and the subframe 112, and both the main frame 111 and the subframe 112 are fixedly connected to the support bracket 113. The main frame 111 and the support bracket 113 are fixed by welding, and the subframe 112 is bolted to the support bracket 113. The powertrain 15 includes an engine 151 located below the main frame 111 and connected to the main frame 111 and the support bracket 113.

[0031] like Figure 3 and Figure 4 As shown, the suspension system 13 also includes a rear swingarm 131 and a chain guard 132. The rear wheel 142 is connected to the frame 11 via the rear swingarm 131, and the chain guard 132 is mounted on the rear swingarm 131. The rear wheel 142 is connected to the engine 151 via a chain 143. The upper part of the chain 143 overlaps the upper surface of the chain guard 132, defining a reference plane 104 perpendicular to the height direction of the motorcycle 100. The reference plane 104 coincides with the axle of the rear wheel 142. The upper part of the chain 143 refers to the portion of the chain 143 located above the reference plane 104.

[0032] In one implementation, the rear swingarm 131 includes a swingarm crossbeam 1311 and a pair of swingarm arms 1312. The pair of swingarm arms 1312 are distributed along the width direction of the motorcycle 100, and each swingarm arm 1312 extends along the length direction of the motorcycle 100. The swingarm crossbeam 1311 is disposed between the pair of swingarm arms 1312 and extends along the width direction of the motorcycle 100. Both ends of the swingarm crossbeam 1311 are fixedly connected to the swingarm arms 1312 in the corresponding directions. The swingarm crossbeam 1311 has a recessed portion 1311a connected to the swingarm arms 1312. At least a portion of the chain guard 132 is installed in the recessed portion 1311a and is located between the chain 143 and the recessed portion 1311a. Viewed along the width direction of the motorcycle 100, the chain guard 132 overlaps with the swingarm arms 1312.

[0033] During the operation of the motorcycle 100, the chain 143 rotates under the action of the power assembly 15. If the output speed of the power assembly 15 is high, the chain 143 will bounce up and down due to inertial force. This design increases the gap between the chain 143 and the chain guard 132, reducing wear between them. Furthermore, by providing a recessed portion 1311a for mounting the chain guard 132, the weight of the rear swingarm 131 can be reduced without affecting its appearance.

[0034] In one implementation, along the height direction of the motorcycle 100, the recessed portion 1311a includes opposing upper and lower surfaces. At least a portion of the chain guard 132 is mounted on the upper surface of the recessed portion 1311a, and at least a portion of the chain guard 132 is also mounted on the lower surface of the recessed portion 1311a. Viewed along the width direction of the motorcycle 100, a first height difference L1 is formed between the upper surface of the recessed portion 1311a and the upper surface of the flat fork 1312, and a second height difference L2 is formed between the lower surface of the recessed portion 1311a and the lower surface of the flat fork 1312. The range of the first height difference L1 is 6mm to 8mm, and the range of the second height difference L2 is 6mm to 8mm. Further, the range of the first height difference L1 is 6.6mm to 7.2mm, and the range of the second height difference L2 is 6.6mm to 7.2mm. More preferably, the first height difference L1 ranges from 6.8mm to 7mm, and the second height difference L2 ranges from 6.8mm to 7mm. It should be noted that if the first height difference L1 and the second height difference L2 are too large, the thickness of the recessed portion 1311a in the height direction of the motorcycle 100 will be small. Since the chain guard 132 is only located on one side of the horizontal fork arm 1312, it may lead to uneven stress on both sides of the rear horizontal fork 131, reducing the structural strength of the rear horizontal fork 131. If the first height difference L1 and the second height difference L2 are too small, the gap between the chain guard 132 and the chain 143 will be insufficient, resulting in significant wear between the chain 143 and the chain guard 132. Through the above settings, the wear between the chain 143 and the chain guard 132 is reduced while ensuring the structural strength of the rear horizontal fork 131.

[0035] In one implementation, the chain guard 132 includes a first guard 1321 and a second guard 1322 connected together, with the first guard 1321 located in front of the second guard 1322. Viewed along the width of the motorcycle 100, the first guard 1321 is U-shaped. The rear swingarm 131 is rotatably connected to the frame 11 via a pivot. The end of the first guard 1321 facing away from the rear wheel 142 is fitted onto this pivot. The first guard 1321 extends from its rotational axis towards the swingarm crossbeam 1311, so that the swingarm crossbeam 1311 is embedded in the U-shaped first guard 1321, with a gap between the swingarm crossbeam 1311 and the first guard 1321. The second guard 1322 is distributed on the upper and lower surfaces of the recessed portion 1311a, serving as an extension of the first guard 1321 and connecting with the recessed portion 1311a.

[0036] Specifically, the second guard 1322 is provided with a limiting part 1322a on the side facing the sinking part 1311a. The sinking part 1311a has a limiting hole 1311b that passes through itself along the height direction of the motorcycle 100. The limiting part 1322a passes through the limiting hole 1311b and limits the limiting part 1322a in the radial and axial directions through the limiting hole 1311b, so as to prevent the chain guard 132 from moving relative to the sinking part 1311a.

[0037] Furthermore, a boss 1321a is provided on the side of the first guard 1321 facing the sunken part 1311a. The first guard 1321 abuts against the sunken part 1311a through the boss 1321a, and the boss 1321a supports the first guard 1321, thereby improving the structural strength of the first guard 1321.

[0038] The above configuration allows for a certain floating space between the first guard 1321 and the lower part 1311a, which helps to buffer the impact on the chain guard 132 when the chain 143 collides with the chain guard 132, while also ensuring that the chain guard 132 is stably installed on the lower part 1311a.

[0039] As one implementation, the chain guard 132 includes a guard support portion 1323 and a guard friction portion 1324. The guard support portion 1323 is connected to the recessed portion 1311a, and the guard friction portion 1324 is located on the side of the guard support portion 1323 opposite to the recessed portion 1311a. The guard friction portion 1324 can contact the chain 143 and is used to guide the chain 143 to prevent the chain 143 from falling off. Viewed along the width direction of the motorcycle 100, the thickness of the guard friction portion 1324 of the first guard 1321 is greater than the thickness of the guard friction portion 1324 of the second guard 1322.

[0040] Furthermore, the friction part 1324 of the second guard 1322 has an arc-shaped upper edge.

[0041] The above settings enable the chain guard 132 to better adapt to the running trajectory of the chain 143, reducing the wear of the chain guard 132 during the movement of the chain 143.

[0042] like Figure 5 As shown, the motorcycle 100 also includes a braking system 17, which includes a caliper bracket 171, a brake caliper 172, and a brake disc 173. The brake disc 173 is connected to the rear wheel 142. The brake caliper 172 is mounted on the caliper bracket 171 and connected to the rear swingarm 131 via the caliper bracket 171. The brake caliper 172 can clamp or release the brake disc 173 to achieve braking control of the rear wheel 142.

[0043] As one implementation, the suspension system 13 also includes a limiting member 133, which is fixedly connected to the rear swingarm 131. The rear swingarm 131 has an "I"-shaped structure, and the rear wheel 142 is disposed between a pair of swingarm arms 1312 of the rear swingarm 131. The limiting member 133 is located on the end face of the rear swingarm 131 facing the rear wheel 142, that is, the limiting member 133 is installed on the end face of the swingarm arm 1312 facing the rim of the rear wheel 142. The caliper bracket 171 is slidably connected to the limiting member 133, allowing the caliper bracket 171 to move relative to the rear swingarm 131 along the length direction of the motorcycle 100. At least a portion of the limiting member 133 abuts against the caliper bracket 171 and limits the caliper bracket 171 in the width direction of the motorcycle 100.

[0044] During the installation of the caliper bracket 171, the caliper bracket 171 is fitted onto the limiting member 133 and moved along the length direction of the motorcycle 100 until the positions of the brake caliper 172 and the brake disc 173 correspond. The limiting member 133 limits the caliper bracket 171 in the width and height directions of the motorcycle 100.

[0045] With the above settings, during the installation of the rear wheel 142, the caliper bracket 171 moves relative to the rear swingarm 131 along the width direction of the motorcycle 100 under the contact of the rear wheel 142 or the installer, thereby improving the assembly efficiency of the motorcycle 100.

[0046] like Figure 6 As shown, in one implementation, the limiting member 133 includes a locking portion 1331 and a connecting portion 1332 connected to the locking portion 1331. The locking portion 1331 is connected to the rear swingarm 131 through the connecting portion 1332. The length of the locking portion 1331 extending along the height direction of the motorcycle 100 is defined as a first length, and the length of the connecting portion 1332 extending along the height direction of the motorcycle 100 is defined as a second length. The first length is greater than the second length.

[0047] Specifically, a transverse plane 109 is defined that is perpendicular to the length direction of the motorcycle 100, and the orthographic projection of the limiting member 133 on the transverse plane 109 is in the shape of a "T".

[0048] like Figure 7 As shown, as an optional implementation, a reference line 103 parallel to the width direction of the motorcycle 100 is defined. The reference line 103 passes through the limiting member 133. When viewed along the length direction of the motorcycle 100, the shortest distance from the upper and lower edges of the connecting part 1332 to the reference line 103 is equal. Along the reference line 103 and away from the flat fork arm 1312, the shortest distance from the end face of the snap-fit ​​part 1331 to the reference line 103 gradually increases.

[0049] Specifically, the orthographic projection of the snap-fit ​​portion 1331 onto the transverse plane 109 is trapezoidal.

[0050] like Figure 8 As shown, in one implementation, the caliper bracket 171 has a first adjustment hole 1711 that extends through itself along the width direction of the motorcycle 100, the limiting member 133 has a second adjustment hole 1333 corresponding to the first adjustment hole 1711, and the caliper bracket 171 is equipped with an adjustment member 174 that passes through the first adjustment hole 1711 and the second adjustment hole 1333 to press the caliper bracket 171 against the limiting member 133.

[0051] Specifically, the first adjustment hole 1711 or the second adjustment hole 1333 is elongated and extends along the length of the motorcycle 100.

[0052] For example, the elongated first adjustment hole 1711 or the second adjustment hole 1333 can be a waist-shaped hole.

[0053] In this embodiment, the first adjusting hole 1711 is an oblong hole, the second adjusting hole 1333 is a threaded hole, and the adjusting member 174 adopts a countersunk bolt structure, which includes a countersunk head 1741, an abutment portion 1742, and a threaded portion 1743 connected in sequence. The diameter of the countersunk head 1741 is larger than the diameter of the abutment portion 1742, the diameter of the abutment portion 1742 is greater than or equal to the diameter of the threaded portion 1743, and the diameter of the abutment portion 1742 is smaller than the width of the oblong hole. The second adjusting hole 1333 is provided with a thread that can cooperate with the threaded portion 1743. The abutment portion 1742 of the adjusting member 174 passes through the oblong hole and abuts against the end face of the limiting member 133 to prevent the adjusting member 174 from being screwed in too deeply, which would prevent the caliper bracket 171 from moving along the length direction of the motorcycle 100. A gap is reserved between the countersunk head 1741 and the caliper bracket 171 so that the caliper bracket 171 can move along the length direction of the motorcycle 100.

[0054] With the above settings, the adjusting member 174 can limit and constrain the caliper bracket 171 in the width direction of the motorcycle 100, and reserve sliding space for the caliper bracket 171 in the length direction of the motorcycle 100.

[0055] like Figure 9 and Figure 10 As shown, the motorcycle 100 also includes a lighting system 18, which includes a headlight 181 connected to the frame 11. Specifically, the frame 11 also includes a headlight bracket 115 connected to the main frame 11, the headlight bracket 115 being located at the front of the main frame 11, and the headlight 181 being mounted on the headlight bracket 115.

[0056] In one implementation, the body panel 12 includes a front panel 123, which is divided into a first functional area 1231 and a second functional area 1232. The first functional area 1231 is located in front of and covers the headlight 181. The first functional area 1231 is made of a light-transmitting material, allowing the light generated by the headlight 181 to pass through it. At least a portion of the second functional area 1232 is located above the first functional area 1231, and the second functional area 1232 is used to guide airflow.

[0057] Specifically, the second functional area 1232 is inclined from the first functional area 1231 toward the rear and upper part of the motorcycle 100, and a continuous and smooth curved surface is formed between the first functional area 1231 and the second functional area 1232.

[0058] Furthermore, the front cover 123 is a component that has undergone photocuring treatment, which forms a dense cured protective layer on the surface of the front cover 123, thereby improving the scratch resistance of the front cover 123.

[0059] Through the above settings, the front cover 123 integrates the functions of light transmission and blocking oncoming airflow, making the overall integration of the vehicle more advanced and reducing the overall vehicle cost and installation procedures.

[0060] like Figures 9 to 11As shown, in one implementation, the headlight 181 includes turn signals 1811 and headlights 1812 distributed vertically. The first functional area 1231 includes a turning area 1231a covering the turn signals 1811 and a headlight area 1231b covering the headlights 1812. The turning area 1231a is connected to the second functional area 1232. A reference plane 104 is defined perpendicular to the height direction of the motorcycle 100. Viewed along the width direction of the motorcycle 100, the front edge of the turning area 1231a forms a first tilt angle ζ with the reference plane 104, and the front edge of the second functional area 1232 forms a second tilt angle η with the reference plane 104. The included angles of the first tilt angle ζ and the second tilt angle η are both in the range of 40° to 50°. Further, the included angles of the first tilt angle ζ and the second tilt angle η are both in the range of 42° to 48°. More preferably, the included angles of the first tilt angle ζ and the second tilt angle η are both 45°. It should be noted that if the included angle is too small, it may affect the beam angle of the headlight 181; if the included angle is too large, the front profile will be too forward-leaning, which may interfere with the projection direction of the illumination beam of the first functional area 1231 and increase the wind resistance of the second functional area 1232. Through the above settings, the turning area 1231a and the second functional area 1232 form a smooth transition in structure, while effectively guiding the airflow, thus balancing the lighting performance and aerodynamic performance of the front cover 123.

[0061] In one implementation, windshield fixing portions 1232a are respectively provided on the left and right sides of the second functional area 1232, and the second functional area 1232 is fixedly connected to the headlight bracket 115 through the windshield fixing portions 1232a. In this embodiment, the structures of the windshield fixing portions 1232a on the left and right sides are identical, and only one side of the windshield fixing portion 1232a will be described in detail below. At least a portion of the second functional area 1232 is recessed towards the rear of the motorcycle 100 to form a boss-shaped windshield fixing portion 1232a extending towards the rear of the motorcycle 100, and the headlight bracket 115 is connected to the windshield fixing portion 1232a by fasteners.

[0062] like Figure 10 As shown, specifically, the headlight bracket 115 includes a U-shaped support tube 1151, with both ends of the support tube 1151 connected to the windshield fixing portion 1232a in the corresponding direction. In this embodiment, the headlight bracket 115 has mounting ears 1151a at both ends, which abut against the windshield fixing portion 1232a and are pre-tightened by fasteners. Since the first functional area 1231 and the second functional area 1232 are integrated on a front cover 123, the headlight bracket 115 can provide support for the second functional area 1232 through the windshield fixing portion 1232a, thereby improving the stability of the front cover 123.

[0063] Furthermore, a groove is formed on the side of the windshield fixing part 1232a away from the headlight bracket 115. The motorcycle 100 also includes a rearview mirror (not shown), at least a portion of which is embedded in the groove. The windshield fixing part 1232a has a rearview mirror mounting hole that passes through it. At least a portion of the rearview mirror passes through the rearview mirror mounting hole, which limits the rearview mirror in its radial direction.

[0064] With the above configuration, the connection between the rearview mirror and the front cover 123 and the connection between the headlight bracket 115 and the front cover 123 are integrated into the windshield fixing part 1232a, which improves the stability of the front cover 123 and reduces the production cost of the front cover 123.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A motorcycle, comprising: Frame; A suspension system comprising a rear swingarm and a chain guard, the rear swingarm being connected to the frame and the chain guard being mounted on the rear swingarm; The engine is supported by the vehicle frame; A walking system includes a rear wheel connected to the rear swingarm and driven to the engine via a chain. The rear swingarm is characterized in that it includes a pair of swingarm arms distributed along the width direction of the motorcycle and a pair of swingarm crossbeams disposed between the swingarm arms, the upper surface of the swingarm crossbeams forming a recessed portion connected to the swingarm arms, and at least a portion of the chain guard is installed in the recessed portion and located between the chain and the recessed portion.

2. The motorcycle according to claim 1, characterized in that, Viewed along the width of the motorcycle, the chain guard overlaps with the flat fork arm.

3. The motorcycle according to claim 2, characterized in that, Both the recessed portion and the flat fork arm have opposing upper and lower surfaces. The upper surface of the recessed portion has a first height difference with the upper surface of the flat fork arm, and the lower surface of the recessed portion has a second height difference with the lower surface of the flat fork arm. The range of the first height difference and the second height difference is 6mm to 8mm.

4. The motorcycle according to claim 1, characterized in that, The chain guard includes a first guard and a second guard connected together. The first guard is located in front of the second guard. A gap is formed between the first guard and the upper surface of the sinking part, and the second guard is in contact with the upper surface of the sinking part.

5. The motorcycle according to claim 4, characterized in that, The second guard is provided with a limiting part on the side facing the lower part. The lower part has a limiting hole that extends through itself along the height direction of the motorcycle. The limiting part passes through the limiting hole and limits the limiting part in its radial and axial directions through the limiting hole.

6. The motorcycle according to claim 4, characterized in that, The first protective clip has a protrusion on the side facing the sunken part, and the first protective clip abuts against the sunken part through the protrusion.

7. The motorcycle according to claim 4, characterized in that, The chain guard includes a support portion and a friction portion. The support portion is connected to the sinking portion, and the friction portion is located on the side of the support portion away from the sinking portion. The friction portion can contact the chain. When viewed along the width direction of the motorcycle, the thickness of the friction portion of the first guard is greater than the thickness of the friction portion of the second guard.

8. The motorcycle according to claim 7, characterized in that, The friction portion of the second protective card has an arc-shaped upper edge.

9. The motorcycle according to claim 1, characterized in that, The motorcycle also includes a braking system, which includes a caliper bracket, a brake caliper, and a brake disc. The brake disc is connected to the rear wheel, and the brake caliper is connected to the rear swingarm via the caliper bracket. The suspension system includes a limiting member, which is fixedly connected to the rear swingarm and located on the side of the rear swingarm facing the rear wheel. The caliper bracket is slidably connected to the limiting member, and at least a portion of the limiting member abuts against the caliper bracket and limits the caliper bracket in the width direction of the motorcycle.

10. The motorcycle according to claim 9, characterized in that, The limiting member includes a locking part and a connecting part. The locking part is connected to the rear horizontal fork through the connecting part. The length of the locking part extending along the height direction of the motorcycle is defined as a first length, and the length of the connecting part extending along the height direction of the motorcycle is defined as a second length. The first length is greater than the second length.

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