Damping assembly and monocycle

Abstract

The utility model discloses a shock absorption assembly and a monocycle. The shock absorption assembly comprises a shock absorber; the side plate is provided with a guide groove so as to be hinged to one end of the shock absorber; the connecting plate is hinged to the side plate; the adjusting assembly is used for adjusting the position, relative to the side plate, of the shock absorber along the guide groove, the adjusting assembly comprises a threaded rod, a knob part and a connecting rod, the threaded rod rotatably penetrates through the side plate along the guide groove, the connecting rod is arranged in the guide groove and connected with one end of the shock absorber, and the knob part is arranged at the penetrating-out end of the threaded rod and used for abutting against the side plate; and the knob piece and the connecting rod are connected with the threaded rod through positive and negative threads so as to screw the threaded rod to enable the connecting rod to move in the guide groove. The position of one end of the shock absorber on the side plate is adjusted on the side portion, so that the hardness of the shock absorber is adjusted, the purpose of preventing looseness can be achieved through the positive and negative threads, and meanwhile the shock absorber has the advantage of being simple in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of unicycles, in particular to a shock absorbing component and a unicycle. Background Art

[0002] With the advancement of technology and the improvement of people's living standards, the unicycle has gradually become popular as a novel and convenient means of transportation. However, due to design limitations, traditional unicycles often have problems such as low riding stability and difficulty in maneuvering. The stability problem is particularly prominent when riding on uneven roads.

[0003] In order to improve the riding stability and handling performance of unicycles, researchers and designers have been working hard to explore new design solutions. Among them, an effective method is to reduce the impact of vibration on the user by setting a shock-absorbing mechanism on the unicycle. Traditional shock-absorbing mechanisms can only provide one kind of shock-absorbing hardness and softness. However, the shock-absorbing hardness and softness required by different road sections are different, and the shock-absorbing hardness and softness adapted to different users are also different. In order to adapt to different road sections and ensure that different users can get a good handling experience, the shock-absorbing mechanism is usually set to an adjustable mode. For example, Chinese patent CN220096554U discloses a shock-absorbing device, including two side plates, two connecting plates and a shock absorber. The two side plates are arranged parallel to the two sides of the shock absorber and are hingedly connected to one end of the shock absorber. The other end of the shock absorber is hingedly connected to the connecting plate. The rear end of the shock absorber is provided with an adjustment component to enable the shock absorber to slide and position along the guide groove. The adjustment component of the shock-absorbing device is directly arranged at the rear end of the shock absorber. The shock-absorbing force of the shock absorber directly acts on the adjustment component, which can easily cause the adjustment component to loosen or even be damaged, thereby affecting the normal use of the shock absorber. Furthermore, an additional limiting plate needs to be provided in order to install the adjustment assembly, which complicates the structure of the shock absorbing device. Utility Model Content

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, one of the purposes of the present invention is to provide a shock-absorbing assembly to adjust the position of one end of the shock absorber on the side panel, thereby adjusting the hardness of the shock absorber, and preventing loosening by setting the positive and negative threads, while having the characteristics of simple structure.

[0005] The second purpose of the utility model is to provide a unicycle that can give full play to the shock-absorbing effect of the shock absorber, and can adjust the softness and hardness of the shock absorber during riding, so as to meet the needs of users of different weights, and ensure the durability and shock absorption accuracy of the shock absorber to ensure the user's riding experience and safety.

[0006] One of the technical solutions adopted by the present invention to solve the problem is:

[0007] A shock absorbing assembly, comprising:

[0008] shock absorbers;

[0009] A side plate is provided with a guide groove for hinged connection with one end of the shock absorber;

[0010] A connecting plate, the connecting plate is hingedly connected to the side plate;

[0011] An adjustment assembly is used to adjust the position of the shock absorber relative to the side plate along the guide groove. The adjustment assembly includes a threaded rod, a knob member and a connecting rod. The threaded rod can rotatably pass through the side plate along the guide groove. The connecting rod is arranged in the guide groove and connected to one end of the shock absorber. The knob member is arranged at the protruding end of the threaded rod to be used to abut against the side plate, and the knob member and the connecting rod are connected to the threaded rod through positive and negative threads to screw the threaded rod to move the connecting rod in the guide groove.

[0012] As a preferred embodiment, in the present invention, two side panels are relatively parallel and respectively located on both sides of the shock absorber, two connecting plates are relatively parallel and respectively located on both sides of the shock absorber, a connecting rod passes through one end of the shock absorber, and both ends of the connecting rod are respectively arranged in the guide grooves of the two side panels.

[0013] As a preferred embodiment, in the present invention, the connecting rod is connected to the threaded rod via a positive thread, and the knob is connected to the threaded rod via a negative thread.

[0014] As a preferred embodiment, in the present invention, the connecting rod is connected to the threaded rod via a reverse thread, and the knob is connected to the threaded rod via a normal thread.

[0015] As a preferred embodiment, in the present invention, the threaded rod includes a screw segment and a nut, the nut is fixed to one end of the screw segment, and the knob member is screwed to the other end of the screw segment, and the side plate has a first abutting surface and a second abutting surface that are arranged opposite to each other, the inner side surface of the nut is used to abut against the first abutting surface to provide a pulling force for the connecting rod to move toward the nut for adjustment, and the inner side surface of the knob member is used to abut against the second abutting surface to provide a pulling force for the connecting rod to move toward the knob member for adjustment; the distance between the first abutting surface and the second abutting surface is smaller than the distance between the inner side surface of the nut and the inner side surface of the knob member.

[0016] As a preferred embodiment, in the present invention, the end of the knob part away from the side plate is a blocking structure, and the protruding end of the threaded rod is threaded into the knob part. The blocking structure can be abutted against the protruding end of the threaded rod to limit the length of the threaded rod screwed into the knob part.

[0017] As a preferred embodiment, in the present invention, one side surface of the guide groove in the length direction is used to abut against the connecting rod to provide supporting force.

[0018] As a preferred embodiment, in the present invention, the side panel includes a side panel body and a reinforcement portion that are adjacently arranged. The reinforcement portion is provided with a guide groove, and the thickness of the reinforcement portion along the extension direction of the connecting rod is greater than the thickness of the side panel body.

[0019] As a preferred embodiment, in the present invention, the side plate is provided with equally spaced scale lines along the extension direction of the guide groove, and the scale lines are correspondingly provided on the side of the guide groove.

[0020] The second technical solution adopted by the present invention to solve the problem is:

[0021] A wheelbarrow comprising: a wheel assembly, a frame assembly, and the above-mentioned shock-absorbing assembly, wherein the frame assembly is slidably mounted on the wheel assembly, one of the side plate and the connecting plate is hingedly connected to the wheel assembly, and the other is hingedly connected to the frame assembly;

[0022] The other end of the shock absorber is hingedly connected to the connecting plate, or the other end of the shock absorber is hingedly connected to one of the wheel assembly and the frame assembly.

[0023] The beneficial effects of the shock absorbing assembly and the wheelbarrow provided by the utility model are as follows:

[0024] The shock absorber assembly is achieved by passing the threaded rod through the side plate along the guide groove, and the knob and the connecting rod are connected to the threaded rod through positive and negative threads. The threaded rod is screwed to move the connecting rod in the guide groove, thereby adjusting the position of the shock absorber relative to the side plate on the side, and further adjusting the hardness of the shock absorber.

[0025] When the connecting rod is driven to move toward the knob member, the knob member abuts against the side plate to provide pulling force, and the knob member tends to be screwed into the threaded rod, thereby preventing the knob member from being screwed out of the threaded rod, achieving the purpose of preventing loosening, and having the characteristic of simple structure.

[0026] The application of the shock-absorbing component in the unicycle can give full play to the shock-absorbing effect of the shock absorber and realize the adjustment of the softness and hardness of the shock absorber during riding, thereby meeting the needs of users of different weights to ensure the user's riding experience and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the shock absorbing assembly of Example 1;

[0028] Figure 2 This is an exploded view of the hinged structure of the side panel and shock absorber of Example 1;

[0029] Figure 3 A side view of the hinged structure of the side panel and shock absorber of Example 1;

[0030] Figure 4 This is a schematic structural diagram of a wheelbarrow according to Example 2;

[0031] Figure 5 This is an exploded view of the wheelbarrow of Example 2.

[0032] The meanings of the reference numerals are as follows:

[0033] 100, wheel assembly; 200, frame assembly; 300, shock absorber assembly; 400, seat;

[0034] 1. Shock absorber; 11. First end of shock absorber; 12. Second end of shock absorber; 2. Side panel; 21. Guide groove; 22. Side panel body; 23. Reinforcement; 24. First end of side panel; 25. Second end of side panel; 251. Upper end; 252. Lower end; 26. Third end of side panel; 3. Connecting plate; 31. First end of connecting plate; 32. Second end of connecting plate; 4. Adjustment assembly; 41. Threaded rod; 411. Nut; 42. Knob; 43. Connecting rod; 5. Rotating rod. DETAILED DESCRIPTION

[0035] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] Example 1

[0039] See Figure 1-3This embodiment provides a shock absorbing assembly, comprising: a shock absorber 1, a side panel 2, a connecting plate 3 and an adjusting assembly 4. The side panel 2 is provided with a guide groove 21 for hinged connection with one end of the shock absorber 1, and the connecting plate 3 is hingedly connected to the side panel 2. The adjusting assembly 4 is used to adjust the position of the shock absorber 1 relative to the side panel 2 along the guide groove 21. The adjusting assembly 4 comprises a threaded rod 41, a knob 42 and a connecting rod 43. The threaded rod 41 rotatably passes through the side panel 2 along the guide groove 21. The connecting rod 43 is arranged in the guide groove 21 and connected to one end of the shock absorber 1. The knob 42 is arranged at the protruding end of the threaded rod 41 for abutting against the side panel 2. The knob 42 and the connecting rod 43 are connected to the threaded rod 41 through positive and negative threads to screw the threaded rod 41 so that the connecting rod 43 moves in the guide groove 21.

[0040] Specifically, the connecting plate 3 is an elongated plate-like structure having a first connecting plate end 31 and a second connecting plate end 32. The side panel 2 is a triangular-shaped structure having a first side panel end 24, a second side panel end 25, and a third side panel end 26. The first connecting plate end 31 is disposed away from the side panel 2, while the second connecting plate end 32 is disposed near the first side panel end 24. Both the second side panel end 25 and the third side panel end 26 are disposed away from the connecting plate 3. The second side panel end 25 is located obliquely above the third side panel end 26, and is disposed further away from the connecting plate 3 than the third side panel end 26. The second side panel end 25 has an upper end 251 and a lower end 252. The shock absorber 1 is an elongated structure having a first shock absorber end 11 and a second shock absorber end 12. The first shock absorber end 11 is disposed near the first connecting plate end 31, while the second shock absorber end 12 is disposed near the second side panel end 25.

[0041] According to the basic structure and basic orientation of the shock absorber 1, the side plate 2 and the connecting plate 3, the second end 12 of the shock absorber is hingedly connected to the second end 25 of the side plate, and the second end 32 of the connecting plate is hingedly connected to the first end 24 of the side plate through a rod-like structure.

[0042] The shock absorber's second end 12 is connected to the side panel's second end 25 via a connecting rod 43. A guide slot 21 is defined in the side panel's second end 24 along the vertical direction. The guide slot 21 extends through the side panel 2 along the direction in which the connecting rod 43 extends. One end of the connecting rod 43 is positioned within the guide slot 21, while the other end of the connecting rod 43 is connected to the shock absorber's second end 12. A threaded rod 41 extends from top to bottom along the guide slot 21, with the upper end of the threaded rod 41 positioned above the upper end 251 and the lower end of the threaded rod 41 positioned below the lower end 252. A knob 42 is positioned below the lower end 252, and the knob 42 and connecting rod 43 are connected to the threaded rod 41 via a forward and reverse thread connection. Thus, turning the threaded rod 41 in different directions causes the connecting rod 43 to move along the guide slot 21, thereby adjusting the hardness of the shock absorber 1.

[0043] Thus, the shock absorber assembly is constructed by inserting a threaded rod 41 along the guide groove 21 through the side plate 2, and connecting the knob 42 and the connecting rod 43 via forward and reverse threads. The threaded rod 41 is screwed to move the connecting rod 43 within the guide groove 21, thereby adjusting the position of the shock absorber 1 relative to the side plate 2 and adjusting the hardness of the shock absorber 1. Furthermore, when the connecting rod 43 is driven toward the knob 42, the knob 42 abuts against the side plate 2 to provide a pulling force, and the knob 42 tends to be screwed into the threaded rod 41, thereby preventing the knob 42 from being screwed out of the threaded rod 41, thereby preventing loosening. The structure is simple.

[0044] The above is the basic structure of the shock absorbing component. Figure 1-3 The specific structure of the shock absorbing assembly of this embodiment is described in detail:

[0045] Two side panels 2 are relatively parallel and respectively located on both sides of the shock absorber 1, two connecting plates 3 are relatively parallel and respectively located on both sides of the shock absorber 1, a connecting rod 43 passes through one end of the shock absorber 1, and both ends of the connecting rod 43 are respectively arranged in the guide grooves 21 of the two side panels 2.

[0046] A rotating rod 5 extends through the first end 11 of the shock absorber, articulating the two connecting plate first ends 31. A connecting rod 43 extends through the second end 12 of the shock absorber, connecting the two side plate second ends 25. The distances between the shock absorber 1 and the two side plates 2, as well as the distances between the shock absorber 1 and the two connecting plates 3, are equal, ensuring uniform and stable transmission of the shock absorber's damping effect. Furthermore, two adjustment assemblies 4 are positioned opposite each other, enabling simultaneous and synchronous adjustment of the shock absorber's hardness to prevent tilting or shifting of the shock absorber's damping effect.

[0047] In addition, the side plate 2 is provided with equally spaced scale lines along the extending direction of the guide groove 21, and the scale lines are correspondingly provided on the sides of the guide groove 21. The provision of the scale lines can improve the synchronization of the adjustment amplitudes of the adjustment components 4 on both sides, further improving the adjustment effect of the shock absorber 1.

[0048] On this basis, the connecting rod 43 is connected to the threaded rod 41 via a positive thread, and the knob 42 is connected to the threaded rod 41 via a negative thread. Alternatively, the connecting rod 43 is connected to the threaded rod 41 via a negative thread, and the knob 42 is connected to the threaded rod 41 via a positive thread. In other words, the positive and negative thread directions of the connecting rod 43 and the knob 42 with the threaded rod 41 are interchangeable to adapt to different user habits.

[0049] Furthermore, the threaded rod 41 includes a screw segment and a nut 411. The nut 411 is fixed to one end of the screw segment, and the knob 42 is screwed to the other end of the screw segment. The side plate 2 has a first abutting surface and a second abutting surface disposed opposite each other. The inner side surface of the nut 411 is used to abut against the first abutting surface to provide a pulling force for moving the connecting rod 43 toward the nut 411 for adjustment. The inner side surface of the knob 42 is used to abut against the second abutting surface to provide a pulling force for moving the connecting rod 43 toward the knob 42 for adjustment. The distance between the first abutting surface and the second abutting surface is smaller than the distance between the inner side surfaces of the nut 411 and the inner side surfaces of the knob 42. In this way, during the adjustment process, when the connecting rod 43 moves toward the knob 42, the pulling force is provided by the knob 42, and when the connecting rod 43 moves toward the nut 411, the pulling force is provided by the nut 411. On this basis, the distance is controlled so that when the knob part 42 abuts against the second abutting surface of the side panel 2 to provide tension, there is a gap between the nut 411 and the first abutting surface; when the nut 411 abuts against the first abutting surface to provide tension, there is a gap between the knob part 42 and the second abutting surface of the side panel 2, so that the threaded rod 41 has a slight axial movement space, reducing friction during adjustment, avoiding biting, and making the adjustment smooth.

[0050] At the same time, the end of the knob 42 away from the side panel 2 is a blocking structure. The protruding end of the threaded rod 41 is threaded into the knob 42. The blocking structure can abut against the protruding end of the threaded rod 41 to limit the length of the threaded rod 41 that can be screwed into the knob 42. The lower end of the knob 42 is provided with a blocking structure, which can further prevent the threaded rod 41 from being over-tightened and stuck.

[0051] The knob 42 may be a nut, and the threaded rod 41 may be a screw. A nut 411 is provided at the insertion end of the threaded rod 41. The nut 411 protrudes radially outward relative to the rod-shaped portion. Specifically, the nut 411 is provided at the upper end of the threaded rod 41, and the sidewall of the nut 411 is an arc-shaped structure, which facilitates the rotation of the threaded rod 41.

[0052] As for the guide groove 21, one side surface in the longitudinal direction thereof is used to abut against the connecting rod 43 to provide a supporting force. The provision of the supporting force can improve the stability of the installation of the connecting rod 43. Moreover, since the adjustment assembly 4 is located at the side, the shock absorber of the shock absorber 1 is prevented from directly acting on the adjustment assembly 4, thereby extending the service life of the adjustment assembly 4.

[0053] In addition, the side plate 2 includes a side plate body 22 and a reinforcement portion 23 that are adjacently arranged. The reinforcement portion 23 defines a guide groove 21 . The thickness of the reinforcement portion 23 along the extending direction of the connecting rod 43 is greater than the thickness of the side plate body 22 .

[0054] The inclusion of guide slot 21 on side panel second end 25 significantly reduces its strength. Furthermore, combined with its hinged connection to shock absorber second end 12, prolonged shock-absorbing operation by shock absorber 1 can easily damage side panel second end 25, thereby affecting the proper functioning of the shock-absorbing assembly. The provision of reinforcement 23 significantly increases the strength of side panel second end 25, thereby extending its service life.

[0055] Example 2

[0056] See Figure 4 and Figure 5 This embodiment provides a unicycle, comprising: a wheel assembly 100, a frame assembly 200, and the shock absorber assembly 300 of Embodiment 1. The frame assembly 200 is slidably mounted on the wheel assembly 100. One of the side plate 2 and the connecting plate 3 is hingedly connected to the wheel assembly 100, and the other is hingedly connected to the frame assembly 200. The other end of the shock absorber 1 is hingedly connected to the connecting rod 3, or the other end of the shock absorber 1 is hingedly connected to either the wheel assembly 100 or the frame assembly 200.

[0057] Specifically, the third end 26 of the side panel 2 is hingedly connected to the wheel assembly 100, the first end 31 of the connecting plate 3 is hingedly connected to the frame assembly 200 and the first end 11 of the shock absorber through the rotating rod 5, and the seat 400 is installed on the frame assembly 200.

[0058] In this way, the shock-absorbing assembly 300 of the unicycle is achieved by inserting the threaded rod 41 through the side plate 2 along the guide groove 21, and the knob 42 and the connecting rod 43 are connected to the threaded rod 41 through the positive and negative threads. The threaded rod 41 is screwed to move the connecting rod 43 in the guide groove 21, thereby adjusting the position of the shock absorber 1 relative to the side plate 2 on the side, thereby adjusting the hardness of the shock absorber 1. Moreover, when the connecting rod 43 is driven to move toward the knob 42, the knob 42 and the side plate 2 are abutted to provide a pulling force, and the knob 42 is in a tendency to be screwed into the threaded rod 41, thereby preventing the knob 42 from being screwed out of the threaded rod 41, achieving the purpose of preventing loosening, and having the characteristics of a simple structure. At the same time, this embodiment can give full play to the shock-absorbing effect of the shock absorber 1, and can adjust the hardness of the shock absorber during riding, thereby meeting the needs of users of different weights to ensure the user's riding experience and safety.

[0059] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A shock absorbing assembly, characterized in that: include: shock absorber (1); A side plate (2), wherein the side plate (2) is provided with a guide groove (21) for hinged connection with one end of the shock absorber (1); A connecting plate (3), the connecting plate (3) being hingedly connected to the side plate (2); An adjusting assembly (4) is used to adjust the position of the shock absorber (1) relative to the side plate (2) along the guide groove (21). The adjusting assembly (4) comprises a threaded rod (41), a knob (42) and a connecting rod (43). The threaded rod (41) rotatably passes through the side plate (2) along the guide groove (21). The connecting rod (43) is arranged in the guide groove (21) and connected to one end of the shock absorber (1). The knob (42) is arranged at the protruding end of the threaded rod (41) to abut against the side plate (2). The knob (42) and the connecting rod (43) are connected to the threaded rod (41) through positive and negative threads so that the threaded rod (41) is screwed to move the connecting rod (43) in the guide groove (21).

2. The shock absorbing assembly according to claim 1, characterized in that: Two side plates (2) are provided in parallel with each other and are respectively located on both sides of the shock absorber (1); two connecting plates (3) are provided in parallel with each other and are respectively located on both sides of the shock absorber (1); the connecting rod (43) passes through one end of the shock absorber (1), and both ends of the connecting rod (43) are respectively provided in the guide grooves (21) of the two side plates (2).

3. The shock absorbing assembly according to claim 1 or 2, characterized in that: The connecting rod (43) is connected to the threaded rod (41) via a positive thread, and the knob (42) is connected to the threaded rod (41) via a negative thread.

4. The shock absorbing assembly according to claim 1 or 2, characterized in that: The connecting rod (43) is connected to the threaded rod (41) via a reverse thread, and the knob (42) is connected to the threaded rod (41) via a positive thread.

5. The shock absorbing assembly according to claim 1 or 2, characterized in that: The threaded rod (41) includes a screw segment and a nut (411), the nut (411) is fixed to one end of the screw segment, and the knob (42) is screwed to the other end of the screw segment. The side plate (2) has a first abutting surface and a second abutting surface that are arranged opposite to each other. The inner side surface of the nut (411) is used to abut against the first abutting surface to provide a pulling force for moving the connecting rod (43) toward the nut (411) for adjustment, and the inner side surface of the knob (42) is used to abut against the second abutting surface to provide a pulling force for moving the connecting rod (43) toward the knob (42) for adjustment; the distance between the first abutting surface and the second abutting surface is smaller than the distance between the inner side surface of the nut (411) and the inner side surface of the knob (42).

6. The shock absorbing assembly according to claim 5, characterized in that: The end of the knob member (42) away from the side plate (2) is a blocking structure, and the protruding end of the threaded rod (41) is screwed into the knob member (42). The blocking structure can abut against the protruding end of the threaded rod (41) to limit the screwing length of the threaded rod (41) in the knob member (42).

7. The shock absorbing assembly according to claim 1 or 2, characterized in that: One side surface of the guide groove (21) in the length direction is used to abut against the connecting rod (43) to provide supporting force.

8. The shock absorbing assembly according to claim 1 or 2, characterized in that: The side plate (2) comprises a side plate body (22) and a reinforcement portion (23) arranged adjacent to each other, the reinforcement portion (23) being provided with the guide groove (21), and the thickness of the reinforcement portion (23) along the extension direction of the connecting rod (43) being greater than the thickness of the side plate body (22).

9. The shock absorbing assembly according to claim 1 or 2, characterized in that: The side plate (2) is provided with equidistant scale lines along the extending direction of the guide groove (21), and the scale lines are correspondingly provided on the side portions of the guide groove (21).

10. A wheelbarrow, characterized in that: include: A wheel assembly (100), a frame assembly (200), and a shock absorbing assembly (300) according to any one of claims 1 to 9, wherein the frame assembly (200) is slidably mounted on the wheel assembly (100), one of the side plate (2) and the connecting plate (3) is hingedly connected to the wheel assembly (100), and the other is hingedly connected to the frame assembly (200); The other end of the shock absorber (1) is hingedly connected to the connecting plate (3), or the other end of the shock absorber (1) is hingedly connected to one of the wheel assembly (100) and the frame assembly (200).

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