Buffer device and vehicle

Abstract

The application relates to the technical field of electric vehicles, and particularly discloses a buffering device and a vehicle. The buffering device comprises a connecting structure and a blocking structure. The connecting structure is inserted into a wheel shaft of the vehicle, and the connecting structure is clamped between a vehicle frame and a first pulley. The blocking structure is connected to the connecting structure, and the blocking structure is located on a side of a belt away from the vehicle frame. The blocking structure is spaced apart from the belt to form a preset interval, and the preset interval is smaller than the tooth height of the belt. The connecting structure of the buffering device is connected to the vehicle frame. The blocking structure is located on a side of the belt away from the first pulley, and the blocking structure is spaced apart from the belt. When the vehicle is normally driven, the blocking structure is spaced apart from the belt, so that the blocking structure does not cause abrasion to the belt, and the service life is prolonged. When the vehicle is driven at low speed, the belt is prone to sudden tension change and relaxation. When the belt is in contact with the blocking structure, the teeth of the belt can keep the state of being engaged with the first pulley, so that tooth slipping and tooth jumping are effectively eliminated.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and more particularly to a buffer device and a vehicle. Background Technology

[0002] Electric vehicles and other common commuter vehicles widely use belt drive systems. Compared to traditional chain drives, belt drives offer advantages such as quiet operation, maintenance-free operation, and environmental friendliness. When paired with a continuously variable transmission (CVT) rear hub, they provide a smooth shifting experience, making them the mainstream configuration for electric vehicles. The electric vehicle's drivetrain includes a drive pulley, a driven pulley, a rear hub, and a drive motor. The drive motor is connected to the drive pulley, and the driven pulley is connected to the frame via the rear hub. The belt winds between the drive and driven pulleys to transmit power. When riding at low speeds, the drive motor delivers a large instantaneous torque with a relatively small gear ratio, making the belt prone to tension fluctuations and loose engagement, leading to slippage and skipping of teeth. Current technology, which adjusts belt tension using a fixed tensioner, only achieves static tension adjustment and cannot adapt to dynamic tension changes under low-speed, high-torque conditions. It also struggles to effectively absorb the instantaneous torque impact from the motor and is incompatible with the installation space and drivetrain layout of the rear hub. Meanwhile, the high torque output of the motor will intensify the meshing impact between the belt and the pulley. The fixed tensioning structure is prone to excessive local stress on the belt, which will accelerate the wear of the belt teeth. This will not only affect the smoothness of low-speed riding, but also shorten the service life of the belt and the rear hub, increasing the risk of vehicle failure.

[0003] Therefore, a buffer device and vehicle are needed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a buffer device and a vehicle that can solve the problem in the related art where belt slippage and skipping under low-speed, high-torque conditions shorten the service life of the belt and rear hub, increasing the risk of vehicle failure.

[0005] On one hand, the present invention provides a buffer device, which is disposed on a vehicle frame. A drive mechanism is disposed on the vehicle frame, the drive mechanism including a first pulley, a second pulley, and a belt. The first pulley is fixedly connected to a wheel axle, the wheel axle is connected to the vehicle frame, the second pulley is disposed on the vehicle frame, and the belt is sleeved on the outer periphery of the first pulley and the second pulley. The buffer device is used to prevent the belt from skipping teeth. The buffer device includes: A connecting structure is connected to the vehicle frame and located between the vehicle frame and the first pulley; A blocking structure is connected to the connecting structure. The blocking structure is located on the side of the belt away from the first pulley, and the blocking structure and the belt are spaced apart to form a preset interval, which is smaller than the tooth height of the belt.

[0006] As an optional technical solution, the blocking structure includes a blocking arm, one end of which is adjustablely connected to the second end of the connecting structure so that the preset interval is adjustable.

[0007] As an optional technical solution, the buffer device further includes an adjusting member connected between the connecting structure and the blocking arm, which is used to define the relative position of the connecting structure and the blocking arm; A groove is provided on the blocking arm or the connecting structure, and the adjusting member can slide along the groove to adjust the relative position of the connecting structure and the blocking arm.

[0008] As an optional technical solution, the end of the connection structure away from the vehicle frame is provided with two spaced-apart clamping plates to form a mounting groove; One of the clamping plates is provided with a first connecting hole, and the other clamping plate is provided with a second connecting hole. The blocking arm is inserted into the mounting groove, and the sliding groove, the first connecting hole and the second connecting hole are connected. The adjusting member is sequentially inserted through the first connecting hole, the sliding groove and the second connecting hole.

[0009] As an optional technical solution, the adjusting component is an adjusting bolt, the first connecting hole is a through hole, the second connecting hole is a threaded hole, the adjusting bolt passes through the first connecting hole and the slide groove in sequence and then engages with the threaded connection of the second connecting hole so that the two clamping plates clamp the blocking arm.

[0010] As an optional technical solution, the blocking structure also includes a rotating shaft and rolling elements; The blocking arm is provided with two spaced-apart support plates, and the two ends of the rotating shaft are respectively connected to the two support plates. The rolling element is sleeved on the outer periphery of the rotating shaft.

[0011] As an optional technical solution, the connection structure is provided with a protruding plug post, and the plug post is provided with a through plug hole; The connection structure also includes a sealing ring, which is sleeved on the outer periphery of the plug post.

[0012] As an optional technical solution, the connection structure is provided with slots and mounting holes.

[0013] As an optional technical solution, the mounting hole is a slotted hole.

[0014] The buffer device provided by the present invention has at least the following beneficial effects: The buffer device provided by this invention includes a connecting structure and a blocking structure. The connecting structure is inserted into the wheel axle of the vehicle and is sandwiched between the frame and the first pulley. The blocking structure is connected to the connecting structure and is located on the side of the belt away from the frame. The blocking structure and the belt are spaced apart by a preset interval, which is smaller than the tooth height of the belt. The connecting structure of this buffer device can be connected to the frame, providing sufficient support for the buffer device and ensuring its stable position. The blocking structure is connected to the connecting structure and is located on the side of the belt away from the first pulley, spaced apart from the belt. During normal vehicle operation, the belt engages with the first pulley, and the spaced-apart blocking structure prevents wear on the belt, extending their service life. When the vehicle is traveling at low speed, the drive motor outputs a sudden large torque, causing a sudden change in belt tension and a tendency to slack off. Because the preset gap between the blocking structure and the belt is smaller than the tooth height of the belt, the belt teeth remain engaged with the first pulley when the blocking structure comes into contact with the belt. This effectively prevents tooth slippage and skipping, reducing the risk of vehicle malfunction.

[0015] On the other hand, the present invention provides a vehicle including a frame, a drive mechanism and the above-mentioned buffer device. The drive mechanism includes a drive motor, a first pulley, a second pulley and a belt. The first pulley is connected to the frame via a wheel axle. The second pulley is disposed on the frame and is drively connected to the drive motor. The belt is wrapped around the outer periphery of the first pulley and the second pulley.

[0016] The vehicle provided by this invention has at least the following beneficial effects: The vehicle provided by this invention, by being equipped with the aforementioned buffer device, can effectively prevent belt slippage and skipping when the vehicle is riding at low speeds, thereby improving the smoothness of the vehicle's ride, reducing the risk of vehicle failure, and optimizing the stress on the belt and rear hub, thus extending the service life of the belt and rear hub. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the buffer device in Embodiment 1 of the present invention; Figure 2 This is an exploded view of the buffer device in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the connection structure in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the blocking arm in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the buffer device in Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the connection structure in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the buffer device in Embodiment 3 of the present invention; Figure 8 This is a schematic diagram of the connection structure in Embodiment 3 of the present invention.

[0018] In the picture: 10. Connecting structure; 11. Mounting plate; 111. First connecting hole; 112. Second connecting hole; 12. Mounting groove; 13. Insertion post; 131. Insertion hole; 132. Sealing ring; 133. Sealing groove; 14. Slot; 15. Mounting hole; 16. Weight reduction hole; 17. Weight reduction groove; 20. Blocking structure; 21. Blocking arm; 211. Slide groove; 212. Support plate; 2121. Mounting through hole; 2122. Mounting threaded hole; 22. Rotating shaft; 23. Rolling element; 30. Adjusting bolt. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] Example 1 like Figures 1 to 4 As shown, this embodiment provides a buffer device, which is disposed on a vehicle frame, and a drive mechanism is disposed on the vehicle frame. The drive mechanism includes a first pulley, a second pulley, and a belt. The first pulley is fixedly connected to a wheel axle, and the wheel axle is connected to the vehicle frame. The second pulley is disposed on the vehicle frame, and the belt is sleeved on the outer periphery of the first pulley and the second pulley. The buffer device is used to prevent the belt from skipping teeth. The buffer device includes a connecting structure 10 and a blocking structure 20. The connecting structure 10 is connected to the vehicle frame and is located between the vehicle frame and the first pulley. The blocking structure 20 is connected to the connecting structure 10 and is located on the side of the belt away from the first pulley. The blocking structure 20 and the belt are spaced apart to form a preset interval, and the preset interval is less than the tooth height of the belt.

[0024] Specifically, in this embodiment, the buffer device is connected to the vehicle's wheel axle, allowing the connecting structure 10 to be connected to the frame. The frame provides sufficient support for the buffer device, ensuring its stable position. The blocking structure 20 is connected to the connecting structure 10 and is located on the side of the belt away from the first pulley, spaced apart from it. During normal vehicle operation, the belt engages with the first pulley, and the spaced-apart blocking structure 20 prevents wear on the belt, extending their service life. When the vehicle is traveling at low speed, the drive motor outputs a sudden large torque, causing a sudden change in belt tension and a tendency to loosen. Because the preset gap between the blocking structure 20 and the belt is less than the belt's tooth height, the belt teeth remain engaged with the first pulley when the blocking structure 20 comes into contact with the belt. This effectively prevents tooth slippage and skipping, reducing the risk of vehicle malfunction.

[0025] Furthermore, such as Figures 1 to 4As shown, the blocking structure 20 includes a blocking arm 21, one end of which is tunably connected to the second end of the connecting structure 10 so that the preset interval is adjustable.

[0026] Specifically, in this embodiment, by setting one end of the blocking arm 21 to be adjustablely connected to the second end of the connecting structure 10, the preset interval can be adjusted. When the buffer device is installed on different vehicle frames, the preset interval can be adjusted by adjusting the relative position of the blocking arm 21 and the connecting structure 10. This ensures that when the buffer device is installed on different vehicle frames, the preset interval between it and the belt is less than the tooth height of the belt, providing a good buffering effect for different vehicle models. This improves the flexibility and versatility of the buffer device and reduces costs.

[0027] Furthermore, such as Figures 1 to 4 As shown, the buffer device also includes an adjusting member connected between the connecting structure 10 and the blocking arm 21 to define the relative position of the connecting structure 10 and the blocking arm 21; a sliding groove 211 is provided on the blocking arm 21 or the connecting structure 10, and the adjusting member can slide along the sliding groove 211 to adjust the relative position of the connecting structure 10 and the blocking arm 21.

[0028] Specifically, in this embodiment, by providing an adjusting member on the connecting structure 10 and the blocking arm 21, on the one hand, the adjusting member can limit the relative position of the connecting structure 10 and the blocking arm 21, ensuring that the connecting structure 10 provides good support for the blocking arm 21. On the other hand, by providing a groove 211 on the blocking arm 21, the adjusting member can slide along the groove 211, thereby adjusting the position of the blocking arm 21 relative to the connecting structure 10, and thus adjusting the position of the blocking arm 21 relative to the belt, so that the preset interval is always less than the tooth height of the belt, thereby achieving a buffering effect. This arrangement not only allows the buffer device to adapt to different vehicle models, but also allows the position of the blocking arm 21 to be adjusted in time after wear occurs, thereby ensuring the effectiveness of the buffering effect.

[0029] Furthermore, such as Figures 2 to 3 As shown, the end of the connecting structure 10 away from the frame is provided with two spaced clamping plates 11, forming a mounting groove 12; one clamping plate 11 is provided with a first connecting hole 111, and the other clamping plate 11 is provided with a second connecting hole 112. The blocking arm 21 is inserted into the mounting groove 12, and the sliding groove 211, the first connecting hole 111 and the second connecting hole 112 are connected. The adjusting member is sequentially inserted through the first connecting hole 111, the sliding groove 211 and the second connecting hole 112.

[0030] Specifically, in this embodiment, during installation, the blocking arm 21 is first inserted into the mounting groove 12, and the adjusting member is sequentially inserted through the first connecting hole 111, the sliding groove 211 and the second connecting hole 112, so that the two clamping plates 11 clamp the blocking arm 21, thereby ensuring the stability and reliability of the installation of the blocking arm 21.

[0031] Furthermore, such as Figures 1 to 3 As shown, the adjusting component is the adjusting bolt 30. The first connecting hole 111 is a through hole, and the second connecting hole 112 is a threaded hole. The adjusting bolt 30 passes through the first connecting hole 111 and the slide groove 211 in sequence and then engages with the threaded part of the second connecting hole 112 so that the two clamping plates 11 clamp the blocking arm 21.

[0032] Specifically, in this embodiment, the adjusting component is an adjusting bolt 30. The first connecting hole 111 is a through hole, and the second connecting hole 112 is a threaded hole. During installation, the adjusting bolt 30 passes through the through hole and the sliding groove 211 and then connects with the threaded hole, thereby enabling the two clamping plates 11 to clamp the blocking arm 21. When the position of the blocking arm 21 needs to be adjusted, the adjusting bolt 30 is loosened, allowing it to slide along the sliding groove 211 to the target position. Then, the adjusting bolt 30 is tightened to complete the position adjustment of the blocking arm 21. Through the above configuration, the blocking arm 21 and the connecting structure 10 are easy to install and adjust, and the cost is low.

[0033] Alternatively, in another embodiment, the slide groove 211 can be provided on the connecting structure 10, the two clamping plates 11 can be provided on the blocking arm 21, and the first connecting hole 111 and the second connecting hole 112 can be provided on the two clamping plates 11 respectively, which can also achieve the above-mentioned technical effects, and will not be elaborated here.

[0034] Optionally, in another embodiment, the adjusting member includes a linear drive, a slide rail, and a slider. The slide rail is fixedly disposed on the connecting structure 10, and the slider is fixedly disposed on the blocking arm 21. The fixed end of the linear drive is connected to the connecting structure 10, and the telescopic end of the linear drive is connected to the blocking arm 21 or the slider. When the telescopic end of the linear drive extends or retracts, it can drive the blocking arm 21 to move, thereby achieving the function of adjusting the preset interval.

[0035] Furthermore, such as Figure 2 and Figure 4 As shown, the blocking structure 20 also includes a rotating shaft 22 and a rolling element 23; the blocking arm 21 is provided with two spaced support plates 212, the two ends of the rotating shaft 22 are respectively connected to the two support plates 212, and the rolling element 23 is sleeved on the outer periphery of the rotating shaft 22.

[0036] Specifically, in this embodiment, the rolling element 23 is rotatably mounted on the blocking arm 21 via the rotating shaft 22. When the blocking arm 21 abuts against the belt, the rolling element 23 rolls against the belt, which can change the static friction between the blocking arm 21 and the belt into the rolling friction between the rolling element 23 and the belt. This can reduce the impact and interference on the belt movement, reduce belt wear, and extend the belt's service life.

[0037] Optionally, in this embodiment, the blocking arm 21 is provided with two spaced-apart support plates 212, and the two ends of the rotating shaft 22 are respectively connected to the two support plates 212. The rolling element 23 is sleeved on the outer periphery of the rotating shaft 22. This arrangement can limit the rolling element 23, prevent the rolling element 23 from shifting, and improve the reliability of the installation of the rolling element 23.

[0038] Optionally, the rotating shaft 22 is a stud. One support plate 212 has a mounting through hole 2121, and the other mounting plate has a mounting threaded hole 2122. The stud passes through the mounting through hole 2121 and is threaded into the mounting threaded hole 2122, thereby connecting between the two support plates 212. Further optionally, in this embodiment, the mounting through hole 2121 is a stepped hole, capable of accommodating the stud head, thus effectively preventing impact.

[0039] Optionally, in this embodiment, the rolling element 23 is a roller.

[0040] Furthermore, such as Figure 2 and Figure 3 As shown, the connecting structure 10 has a protruding insertion post 13, and the insertion post 13 has a through insertion hole 131; the connecting structure 10 also includes a sealing ring 132, which is sleeved on the outer periphery of the insertion post 13.

[0041] Specifically, in this embodiment, for the assembly on the vehicle frame, a plug-in post 13 is provided on the connecting structure 10, and the plug-in post 13 is provided with a through plug-in hole 131. The plug-in post 13 is plugged into the assembly hole of the frame, thereby ensuring the stability and reliability of the connection between the connecting structure 10 and the frame. Furthermore, a sealing ring 132 is provided on the outer periphery of the plug-in post 13. The sealing ring 132 can fill the gap between the plug-in post 13 and the assembly hole, achieving a waterproof function.

[0042] Optionally, a sealing groove 133 is provided on the outer periphery of the plug post 13, and a sealing ring 132 is disposed in the sealing groove 133, thereby effectively preventing the sealing ring 132 from being misaligned.

[0043] Optionally, in this embodiment, the wheel axle passes through the insertion hole 131, thereby ensuring a stable connection between the wheel axle and the frame.

[0044] Optionally, in this embodiment, a weight-reducing groove 17 is provided on the connecting structure 10 to reduce the overall weight of the connecting structure 10, which is beneficial to the lightweight design of the buffer device.

[0045] Example 2 like Figures 5 to 6 As shown, this embodiment provides a buffer device, which differs from the buffer device in Embodiment 1 only in that the connecting structure 10 is provided with a slot 14 and a mounting hole 15.

[0046] Specifically, in this embodiment, for a vehicle frame equipped with a rear fork, a slot 14 with an opening is provided on the connecting structure 10 to facilitate connection of the slot 14 to the wheel axle. A mounting hole 15 is provided to connect it to the frame, thereby ensuring the installation stability of the connecting structure 10 without interfering with the installation of the frame and wheels, thus reducing costs. In this embodiment, the mounting hole 15 is a round hole.

[0047] Example 3 like Figures 7 to 8 As shown, this embodiment provides a buffer device, which differs from the buffer device in embodiment 2 only in that the mounting hole 15 is an oblong hole.

[0048] Specifically, in this embodiment, for vehicles without a rear fork on the frame, by setting the mounting hole 15 as a waist-shaped hole, which is connected to the frame by two fasteners, the reliability and stability of the connection between the connecting structure 10 and the frame can be ensured. Furthermore, this setting allows adjustment of the position of the fasteners relative to the waist-shaped hole, thereby adjusting the position of the connecting structure 10 relative to the frame, and further adjusting the position of the blocking structure 20 relative to the belt, thus improving the adjustability of the buffer device.

[0049] Optionally, in this embodiment, the connecting structure 10 is also provided with a weight reduction hole 16, which is also used to reduce the overall weight of the connecting structure 10, which is beneficial to the lightweight design of the buffer device.

[0050] Example 4 This embodiment also provides a vehicle, including a frame, a drive mechanism, and a buffer device as described in Embodiment 1, 2, or 3 above. The drive mechanism includes a drive motor, a first pulley, a second pulley, and a belt. The first pulley is connected to the frame via a wheel axle, the second pulley is disposed on the frame and is drive-connected to the drive motor, and the belt is wound around the outer circumference of the first and second pulleys. By incorporating the buffer device as described in any of the above embodiments, this vehicle effectively prevents belt slippage and skipping during low-speed riding, thereby improving the smoothness of the ride, reducing the risk of vehicle malfunction, and optimizing the stress on the belt and rear hub, thus extending the service life of the belt and rear hub.

[0051] Obviously, the above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. A buffer device, mounted on a vehicle frame, wherein a drive mechanism is mounted on the vehicle frame, the drive mechanism comprising a first pulley, a second pulley, and a belt, the first pulley being fixedly connected to a wheel axle, the wheel axle being connected to the vehicle frame, the second pulley being mounted on the vehicle frame, and the belt being sleeved around the outer periphery of the first pulley and the second pulley; the buffer device is used to prevent the belt from skipping teeth, characterized in that... The buffer device includes: A connecting structure (10) is connected to the frame and located between the frame and the first pulley; A blocking structure (20) is connected to the connecting structure (10). The blocking structure (20) is located on the side of the belt away from the first pulley, and the blocking structure (20) and the belt are spaced apart to form a preset interval, and the preset interval is less than the tooth height of the belt.

2. The buffer device according to claim 1, characterized in that, The blocking structure (20) includes a blocking arm (21), one end of which is tunably connected to the second end of the connecting structure (10) so that the preset interval is adjustable.

3. The buffer device according to claim 2, characterized in that, The buffer device further includes an adjusting member connected between the connecting structure (10) and the blocking arm (21) to define the relative position of the connecting structure (10) and the blocking arm (21); A groove (211) is provided on the blocking arm (21) or the connecting structure (10), and the adjusting member can slide along the groove (211) to adjust the relative position of the connecting structure (10) and the blocking arm (21).

4. The buffer device according to claim 3, characterized in that, The connecting structure (10) has two spaced clamping plates (11) at one end away from the frame, forming a mounting groove (12). One of the clamping plates (11) is provided with a first connecting hole (111), and the other clamping plate (11) is provided with a second connecting hole (112). The blocking arm (21) is inserted into the mounting groove (12), and the sliding groove (211), the first connecting hole (111) and the second connecting hole (112) are connected. The adjusting member is sequentially inserted through the first connecting hole (111), the sliding groove (211) and the second connecting hole (112).

5. The buffer device according to claim 4, characterized in that, The adjusting component is an adjusting bolt (30). The first connecting hole (111) is a through hole, and the second connecting hole (112) is a threaded hole. The adjusting bolt (30) passes through the first connecting hole (111) and the slide groove (211) in sequence and then engages with the second connecting hole (112) in a threaded manner so that the two clamping plates (11) clamp the blocking arm (21).

6. The buffer device according to claim 2, characterized in that, The blocking structure (20) also includes a rotating shaft (22) and a rolling element (23); The blocking arm (21) is provided with two spaced support plates (212), and the two ends of the rotating shaft (22) are respectively connected to the two support plates (212). The rolling element (23) is sleeved on the outer periphery of the rotating shaft (22).

7. The buffer device according to any one of claims 1-6, characterized in that, The connecting structure (10) is provided with a protruding plug post (13), and the plug post (13) is provided with a through plug hole (131). The connection structure (10) also includes a sealing ring (132), which is sleeved on the outer periphery of the plug post (13).

8. The buffer device according to any one of claims 1-6, characterized in that, The connection structure (10) is provided with a slot (14) and a mounting hole (15).

9. The buffer device according to claim 8, characterized in that, The mounting hole (15) is a waist-shaped hole.

10. A vehicle, characterized in that, The device includes a frame, a drive mechanism, and a buffer device as described in any one of claims 1-9. The drive mechanism includes a drive motor, a first pulley, a second pulley, and a belt. The first pulley is connected to the frame via a wheel axle. The second pulley is disposed on the frame and is drive-connected to the drive motor. The belt is wound around the outer periphery of the first pulley and the second pulley.

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