A buffer device and a vehicle

Abstract

The present application discloses a buffer device and a vehicle, aiming to solve the technical problem of poor buffering effect after a collision in the prior art. The buffer device is installed at the end of the steering drive shaft and includes a primary buffer assembly, a secondary buffer assembly, and a mounting bracket that are connected in sequence for force transmission. The secondary buffer assembly includes two buffer units. Each buffer unit includes a first bracket, a force transmission slider, a force unloading mechanism, and a force transmission rod. One end of the first bracket is connected to the mounting bracket; the force transmission slider is connected to the primary buffer assembly through a connecting arm and is slidably connected to the first bracket; the force unloading mechanism is arranged parallel to the mounting bracket; one end of the force transmission rod is hinged to the force transmission slider, and the other end is hinged to the force unloading mechanism, so that the first bracket, the force unloading mechanism, and the force transmission rod form a triangular structure. Compared with the setting of the primary buffer assembly, it has stronger buffering performance, can better protect the steering drive shaft, and improve the service effect of the steering drive shaft after a collision.

Description

Technical Field

[0001] This application belongs to the technical field of vehicles, and particularly relates to a buffer device and a vehicle. Background Art

[0002] The function of the steering drive shaft is to transmit the steering torque applied by the driver to the steering wheel to the steering gear. Its upper part is fixedly connected to the steering wheel, and the lower part is connected to the steering gear. The steering drive shaft passes through the steering column tube and is supported on the bearings and bushings inside the column tube. In the existing steering drive shaft during use, there is a lack of protection design for the steering drive shaft after a vehicle collision, resulting in the steering drive shaft being easily damaged and affecting the use effect. That is, when a vehicle has a frontal collision, the steering system including the steering drive shaft, steering column tube, and steering wheel in the front of the vehicle will move backward into the cab, threatening the living space of the driver.

[0003] To solve the technical problem that the steering shaft is easily damaged, a buffer mechanism is usually set in the steering system in the prior art to relieve the impact force during the collision. However, in the prior art, the buffer mechanism has a complex structure, resulting in poor buffer effect and being unable to effectively relieve the impact force generated during the collision. Summary of the Invention

[0004] To solve the above technical problems, this application provides a buffer device and a vehicle, solving the technical problems in the prior art that the buffer mechanism has a complex structure after a vehicle collision, resulting in poor buffer effect and being unable to effectively relieve the impact force generated during the collision.

[0005] The technical solution adopted to achieve the purpose of this application is a buffer device installed at the end of the steering drive shaft, including a primary buffer component, a secondary buffer component, and a mounting bracket for connecting the steering drive shaft that are sequentially connected for force transmission. The secondary buffer component includes two buffer units. Each buffer unit includes a first bracket, a force transmission slider, a force unloading mechanism, and a force transmission rod. One end of the first bracket is connected to the mounting bracket; the force transmission slider is connected to the primary buffer component through a connecting arm and is slidably connected to the first bracket; the force unloading mechanism is arranged parallel to the mounting bracket; one end of the force transmission rod is hinged to the force transmission slider, and the other end is hinged to the force unloading mechanism, so that the first bracket, the force unloading mechanism, and the force transmission rod form a triangular structure.

[0006] Further, the force unloading mechanism includes:

[0007] A force unloading box with a cavity inside and connected to the first bracket;

[0008] A force unloading guide block slidably connected to the mounting bracket and hinged to the force transmission rod;

[0009] The force-releasing rod, one end of which is connected to the force-releasing guide block, and the other end penetrates into the cavity of the force-releasing box and is slidably connected to the force-releasing box;

[0010] The first spring, one end of which acts on the force-releasing rod and the other end acts on the cavity wall of the force-releasing box.

[0011] Further, the secondary buffer assembly further includes an adjustment assembly, and the adjustment assembly includes:

[0012] The fitting member is internally provided with a through hole, the force-transmitting rod penetrates through the through hole and is clamped with the fitting member;

[0013] The adjustment slider is slidably connected to the first bracket,

[0014] The adjustment rod, one end of which is hinged to the fitting member; and the other end is hinged to the adjustment slider.

[0015] Further, the buffer device further includes a contact block that is force-transmittingly connected to the primary buffer assembly;

[0016] The primary buffer assembly includes a folding assembly and a force-guiding assembly that are sequentially force-transmittingly connected. The force-receiving end of the folding assembly is connected to the contact block, and the force-transmitting end of the force-guiding assembly is connected to the force-transmitting slider through the connecting arm.

[0017] Further, the force-guiding assembly includes:

[0018] The second bracket is connected to the force-transmitting slider through the connecting arm;

[0019] The guiding rod is installed on the second bracket;

[0020] The force-guiding slider is sleeved on the guiding rod and is slidably connected to the guiding rod, and the force-guiding slider is connected to the force-transmitting end of the folding assembly;

[0021] The second spring, one end of which acts on the second bracket and the other end acts on the force-guiding slider.

[0022] Further, the folding assembly includes:

[0023] The force-guiding member is connected to the contact block;

[0024] The folding rod, one end of which is hinged to the force-guiding slider and the other end is hinged to the force-guiding member.

[0025] Further, the connecting arm is misaligned with the force-transmitting slider, the force-transmitting slider is hinged to the force-transmitting rod, and the hinge position is opposite to the transition position between the connecting arm and the force-transmitting slider, and the connecting arm is parallel to the first bracket.

[0026] Further, a plurality of limiting holes are formed at one end of the first bracket close to the adjusting slider, a convex block is arranged on the adjusting slider, and the convex block is matched with the limiting holes.

[0027] Further, the contact block is a rubber block.

[0028] Based on the same inventive concept, the present application also provides a vehicle, including:

[0029] A steering drive shaft;

[0030] The above-mentioned buffer device, and the mounting bracket is connected to the end of the steering drive shaft.

[0031] As can be seen from the above technical solutions, the present application provides a buffer device, which is installed at the end of the steering drive shaft and includes a primary buffer assembly, a secondary buffer assembly and a mounting bracket for connecting the steering drive shaft that are sequentially connected for force transmission. The secondary buffer assembly includes two buffer units, and each buffer unit includes a first bracket, a force transmission slider, a force unloading mechanism and a force transmission rod. One end of the first bracket is connected to the mounting bracket; the force transmission slider is connected to the primary buffer assembly through a connecting arm, and the force transmission slider is slidably connected to the first bracket; the force unloading mechanism is arranged in parallel with the mounting bracket; one end of the force transmission rod is hinged to the force transmission slider, and the other end is hinged to the force unloading mechanism, so that the first bracket, the force unloading mechanism and the force transmission rod form a triangular structure. When a collision occurs, the collision force is initially buffered by the primary buffer assembly, and then buffered twice by the secondary buffer assembly, further buffering the collision force and avoiding directly transmitting the collision force to the steering drive shaft, thereby protecting the steering drive shaft. By setting the primary buffer assembly and the secondary buffer assembly, that is, setting two levels of buffer assemblies, the collision force can be buffered multiple times, improving the protection effect of the buffer device on the steering drive shaft during the collision process. Compared with setting only the primary buffer assembly, it has stronger buffering performance, can better protect the steering drive shaft, and improve the service effect of the steering drive shaft after the collision. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of the buffer device connected to the steering drive shaft from a perspective in an embodiment of the present application.

[0033] Figure 2 It is a schematic structural diagram of the buffer device connected to the steering drive shaft from another perspective in an embodiment of the present application.

[0034] Figure 3 It is a schematic structural diagram of the buffer device in an embodiment of the present application.

[0035] Figure 4 It is a schematic structural diagram of the primary buffer assembly in an embodiment of the present application.

[0036] Figure 5This is a schematic diagram of the buffer unit structure in the embodiments of the present application.

[0037] Figure 6 This is a schematic diagram of the adjustment component structure in the embodiments of the present application.

[0038] Explanation of reference numerals: 100 - buffer device, 110 - primary buffer component, 111 - folding component, 1111 - force guiding member, 1112 - folding rod, 112 - force guiding component, 1121 - second bracket, 1122 - guiding rod, 1123 - force guiding slider, 1124 - second spring, 120 - secondary buffer component, 121 - buffer unit, 122 - first bracket, 1221 - limiting hole, 123 - force transmitting slider, 124 - force unloading mechanism, 1241 - force unloading box, 1242 - force unloading guiding block, 1243 - force unloading rod, 1244 - first spring, 125 - force transmitting rod, 126 - adjustment component, 1261 - mating part, 1262 - adjustment slider, 1263 - adjustment rod, 1264 - convex block, 130 - mounting bracket; 140 - connecting arm; 150 - contact block, 1501 - first bent block, 1502 - second bent block, 200 - steering transmission shaft. Detailed implementation manners

[0039] In order to enable those skilled in the art in the technical field to which the present application belongs to understand the present application more clearly, the technical solution of the present application will be described in detail below with reference to the accompanying drawings and through specific embodiments.

[0040] Embodiment 1:

[0041] In the embodiments of the present application, a buffer device is provided, which is installed at the end of the steering transmission shaft. Refer to the attached Figure 1 to the attached Figure 6 . The buffer device 100 includes a primary buffer component 110, a secondary buffer component 120, and a mounting bracket 130 for connecting to the steering transmission shaft 200, which are sequentially connected for force transmission. The secondary buffer component 120 includes two buffer units 121. The buffer unit 121 includes a first bracket 122, a force transmitting slider 123, a force unloading mechanism 124, and a force transmitting rod 125. One end of the first bracket 122 is connected to the mounting bracket 130; the force transmitting slider 123 is connected to the primary buffer component 110 through a connecting arm 140, and the force transmitting slider 123 is slidably connected to the first bracket 122; the force unloading mechanism 124 is arranged parallel to the mounting bracket 130; one end of the force transmitting rod 125 is hinged to the force transmitting slider 123, and the other end is hinged to the force unloading mechanism 124, so that the first bracket 122, the force unloading mechanism 124, and the force transmitting rod 125 form a triangular structure.

[0042] Thus, during the collision process, the collision force is initially buffered by the primary buffer assembly 110. At this time, the primary buffer assembly can perform primary force buffering. Then, it is further buffered by the secondary buffer assembly 120 to further buffer the collision force and prevent the collision force from being directly transmitted to the steering drive shaft 200. At this time, the secondary buffer assembly further absorbs the collision force and protects the steering drive shaft 200. By providing the primary buffer assembly 110 and the secondary buffer assembly 120, that is, providing two levels of buffer assemblies, the collision force can be buffered multiple times, improving the protection effect of the buffer device 100 on the steering drive shaft 200 during the collision process. Compared with providing only the primary buffer assembly 110, it has stronger buffering performance, can better protect the steering drive shaft 200, and improve the service effect of the steering drive shaft 200 after the collision.

[0043] In addition, the secondary buffer assembly 120 is provided with two buffer units 121. By forming a triangular structure with the first bracket 122, the force relief mechanism 124, and the force transmission rod 125, the triangular structure is more stable than the polygonal buffer mechanism. At the same time, the collision force is transmitted to the first bracket 122 through the primary buffer assembly 110, and then the collision force is further buffered through the action of the force relief mechanism 124 and the force transmission rod 125.

[0044] In some embodiments, referring to the attached Figure 5 , the force relief mechanism 124 includes a force relief box 1241, a force relief guide block 1242, a force relief rod 1243, and a first spring 1244. The force relief box 1241 is internally provided with a cavity and is connected to the first bracket 122; the force relief guide block 1242 is slidably connected to the mounting frame 130 and is hinged to the force transmission rod 125; one end of the force relief rod 1243 is connected to the force relief guide block 1242, and the other end passes through the cavity of the force relief box 1241 and is slidably connected to the force relief box 1241; one end of the first spring 1244 acts on the force relief rod 1243, and the other end acts on the cavity wall of the force relief box 1241. During the collision process, the collision force can cause the force relief guide block 1242 to slide on the mounting frame 130, driving the force relief rod 1243 to move within the force relief box 1241, thereby driving the first spring 1244 to contract or elongate, thus relieving a part of the collision force and achieving the purpose of protecting the steering drive shaft 200. Preferably, in order to improve the stability of the buffering effect of the first spring 1244, one end of the first spring 1244 is fixedly connected to the cavity wall of the force relief box 1241, and the other end of the first spring 1244 is fixedly connected to the force relief rod 1243.

[0045] To ensure the stability of the force, in some embodiments, referring to the attached Figure 5, the force unloading box 1241 is arranged in parallel with the mounting bracket 130. The force unloading box 1241 can be a cube, an elliptical cylinder or a cylinder. A cavity is provided inside, and an opening is provided at one end for the force unloading rod 1243 to slide in the cavity of the force unloading box 1241 after passing through the opening of the force unloading box 1241. The force unloading box 1241 is mounted on the mounting bracket 130, and welding or screw connection can be used, preferably welding.

[0046] In order to facilitate the installation of the first spring 1244 in the cavity of the force unloading box 1241, in some embodiments, an empty slot can be provided on the side of the force unloading box 1241 away from the mounting bracket 130, and the opening size of the empty slot can be opened according to the size of the first spring 1244; in other embodiments, if the force unloading box 1241 is in the shape of a cube, the side away from the mounting bracket 130 can be fully opened or partially opened according to the size of the first spring 1244. In other embodiments, the empty slot can be communicated with the cavity inlet of the force unloading box 1241 or not.

[0047] In some embodiments, refer to the appendix Figure 5 , the first spring 1244 can also be replaced with an elastic block with elasticity, as long as it can be installed in the cavity of the force unloading box 1241 and play a role of extrusion or reset along the direction parallel to the mounting bracket 130. At this time, one end of the elastic block acts on the force unloading rod 1243, and the other end acts on the cavity wall of the force unloading box 1241. Preferably, in order to improve the stability of the action of the elastic block, one end of the elastic block is fixedly connected to the cavity wall of the force unloading box 1241, and the other end is fixedly connected to the force unloading rod 1243.

[0048] In order to partially decompose and buffer the force on the force unloading mechanism 124, in some embodiments, refer to the appendix Figure 5 and the appendix Figure 6, the secondary buffer assembly further includes an adjustment assembly 126. The adjustment assembly 126 includes a fitting 1261, an adjustment slider 1262, and an adjustment rod 1263. A through hole is provided in the fitting 1261, and the force transmission rod 125 passes through the through hole and is clamped with the fitting 1261. A clamping hole perpendicular to the through hole may be provided in the fitting 1261, and a limiting hole corresponding to the clamping hole is provided on the force transmission rod 125. After the force transmission rod 125 penetrates into the through hole and the limiting hole corresponds to the clamping hole, the force transmission rod 125 and the fitting 1261 are clamped by a clamping rod passing through the clamping hole and the limiting hole; alternatively, a clamping block or a clamping groove may be provided on the force transmission rod 125, and a corresponding clamping groove or clamping block is provided on the fitting 1261, so that the force transmission rod 125 and the fitting 1261 are clamped; the adjustment slider 1262 is slidably connected to the first bracket 122; one end of the adjustment rod 1263 is hinged to the fitting 1261, and the other end is hinged to the adjustment slider 1262. During the collision, the force transmission slider 123 slides on the first bracket 122, driving the force transmission rod 125 to rotate and move along the direction away from the first bracket 122, thereby driving the rotation of the fitting 1261. The rotation of the fitting 1261 drives the movement of the adjustment rod 1263. At this time, in order to ensure the stability of force transmission, the adjustment rod 1263 drives the adjustment slider 1262 to move on the first bracket 122, so that the force is further buffered and energy-absorbed.

[0049] In order to prevent the adjustment slider 1262 from detaching during the collision, in some embodiments, a plurality of limiting holes 1221 are provided at one end of the first bracket 122 close to the adjustment slider 1262, and a convex block 1264 is provided on the adjustment slider 1262. The convex block 1264 cooperates with the limiting holes 1221. That is, the adjustment slider 1262 can be prevented from detaching from the first bracket 122 through the cooperation of the convex block 1264 and the limiting block.

[0050] In some embodiments, referring to the attached Figure 4 , the buffer device 100 further includes a contact block 150 that is force-transmittingly connected to the primary buffer assembly 110; that is, during the collision, the collision force can be absorbed by the contact block 150 first. The contact block 150 may be a bent block structure, and the shape is not limited here. In the bent block structure, the contact block 150 includes a first bent block 1501 and a second bent block 1502. The first bent block 1501 is used to connect to the steering gear in the vehicle, and the second bent block 1502 is located on one side of the first buffer assembly. During the collision, the second bent block 1502 can play a buffering role to a certain extent, and at the same time can shield and protect the primary buffer assembly 110.

[0051] In some embodiments, referring to the attached Figure 4, the contact block 150 is a rubber block. The rubber block can be damping rubber, and this material is used to make the overall buffer device 100 form a damping protection in terms of material during the contact process, so as to absorb a part of the energy at the moment when the collision force occurs, further improving the buffering performance.

[0052] In some embodiments, referring to the attached Figure 4 , the primary buffer assembly 110 includes a folding assembly 111 and a force guiding assembly 112 that are sequentially connected for force transmission. The force receiving end of the folding assembly 111 is connected to the contact block 150, and the force transmitting end of the force guiding assembly 112 is connected to the force transmitting slider 123 through the connecting arm 140. Thus, during the collision process, the contact block 150 initially relieves the force in the collision, and then transmits the collision force to the folding assembly 111. The folding assembly 111 folds and unfolds to decompose the force, and then transmits it to the force transmitting slider 123 through the force guiding assembly 112 and the connecting arm 140, so that the force not buffered by the contact block 150 and the primary buffer assembly 110 is transmitted to the secondary buffer assembly 120 through the force transmitting slider 123, thereby improving the protection effect of the buffer device 100 on the steering drive shaft 200 during the collision process. Compared with the setting of the primary buffer assembly 110, it has stronger buffering performance, can better protect the steering drive shaft 200, and improve the use effect of the steering drive shaft 200 after the collision.

[0053] In some embodiments, referring to the attached Figure 4 , the folding assembly 111 includes a force guiding member 1111 and folding rods 1112. The force guiding member 1111 is connected to the contact block 150; one end of the folding rod 1112 is hinged to the force guiding slider 1123, and the other end is hinged to the force guiding member 1111. In some embodiments, the folding rod 1112 can be provided with 1, 2 or 3, preferably 2. One ends of the 2 folding rods 1112 are both hinged to the folding rod 1112, and the other ends are respectively hinged to the corresponding force guiding sliders 1123. At this time, the 2 folding rods 1112 and the guiding rod 1122 form a triangular structure. During the collision, the collision force is transmitted to the force guiding member 1111 through the contact block 150, and the force guiding member 1111 transmits the force to the folding rods 1112. At this time, under the action of the collision force, the included angle between the two folding rods 1112 at the end of the force guiding member 1111 changes, and at this time, the collision force is continuously transmitted to the force guiding slider 1123, thereby buffering and absorbing the collision force accordingly.

[0054] In some embodiments, referring to the attached Figure 4, the force guiding component 112 includes a second bracket 1121, a guiding rod 1122, a force guiding slider 1123 and a second spring 1124, wherein the second bracket 1121 is connected to the force transmitting slider 123 through a connecting arm 140; the guiding rod 1122 is installed on the second bracket 1121; the force guiding slider 1123 is sleeved on the guiding rod 1122 and is slidably connected to the guiding rod 1122, and the force guiding slider 1123 is connected to the force transmitting end of the folding component 111; one end of the second spring 1124 acts on the second bracket 1121, and the other end acts on the force guiding slider 1123. During a collision, after the collision force is transmitted to the force guiding slider 1123, the force guiding slider 1123 slides on the corresponding guiding rod 1122, and buffers by squeezing or stretching the second spring 1124, thereby completing the primary buffering. At this time, in order to ensure the buffering stability of the second spring 1124, one end of the second spring 1124 can be connected to the second bracket 1121 by welding, and the other end of the second spring 1124 is connected to the force guiding slider 1123 by welding.

[0055] In some embodiments, referring to the attached Figure 4 , the connecting arm 140 is misaligned with the force transmitting slider 123, the force transmitting slider 123 is hinged to the force transmitting rod 125, and the hinged position is opposite to the transition position of the connecting arm 140 and the force transmitting slider 123, and the connecting arm 140 is parallel to the first bracket 122. At this time, the shape of the connecting arm 140 is bent. One can transmit the collision force to the force transmitting slider 123 during the collision process. If the bent part of the connecting arm 140 bends or breaks during the collision process, it can squeeze the force transmitting rod 125 and transmit the collision force to the force transmitting rod 125, so as to further buffer through the force transmitting rod 125 and the force transmitting slider 123, achieving the purpose of secondary buffer energy absorption.

[0056] Embodiment 2

[0057] Based on the same inventive concept, the present application provides a vehicle, including a steering transmission shaft 200 and the above-mentioned buffer device 100, wherein the mounting bracket 130 is connected to the end of the steering transmission shaft 200. Since the specific structure of the vehicle in this embodiment is not improved, the structures of the vehicle that remain unchanged in this embodiment can refer to the prior art, and the specific content will not be elaborated here.

[0058] Through the above embodiments, the present application has the following beneficial effects or advantages:

[0059] 1) The present application provides that during a collision, the collision force is initially buffered by a primary buffer assembly. At this time, the primary buffer assembly can perform initial force buffering, and then a secondary buffer assembly is used for secondary buffering to further buffer the collision force and prevent the collision force from being directly transmitted to the steering drive shaft. At this time, the secondary buffer assembly further absorbs energy from the collision force and protects the steering drive shaft. By providing a primary buffer assembly and a secondary buffer assembly, that is, two levels of buffer assemblies are provided, the collision force can be buffered multiple times, improving the protection effect of the buffer device on the steering drive shaft during the collision process. Compared with providing only a primary buffer assembly, it has stronger buffering performance, can better protect the steering drive shaft, and improve the service effect of the steering drive shaft after the collision.

[0060] 2) In the present application, the contact block is connected to the primary buffer assembly. The contact block is a rubber block, and the rubber block is used to form a damping protection in terms of material during the contact process of the entire buffer device, thereby absorbing a part of the energy at the moment when the collision force occurs and further improving the buffering performance.

[0061] 3) In the present application, the collision force is transmitted to the force guiding member through the contact block, and the force guiding member transmits the force to the folding rod. At this time, under the action of the collision force, the included angle between the two folding rods at the end of the force guiding member changes. At this time, the collision force is continuously transmitted to the guiding slider, thereby performing corresponding buffer energy absorption on the collision force. After the collision force is transmitted to the guiding slider, the guiding slider slides on the corresponding guiding rod and buffers by squeezing or stretching the second spring, thereby completing the primary buffering.

[0062] Although the preferred embodiments of the present application have been described, those of ordinary skill in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

Claims

1. A buffer device is installed at the end of a steering drive shaft. Characterized in that, It includes a primary buffer assembly, a secondary buffer assembly that are sequentially connected for force transmission, and a mounting bracket for connecting the steering drive shaft. The secondary buffer assembly includes two buffer units. Each buffer unit includes a first bracket, a force transmission slider, a force unloading mechanism, and a force transmission rod. One end of the first bracket is connected to the mounting bracket; the force transmission slider is connected to the primary buffer assembly through a connecting arm, and the force transmission slider is slidably connected to the first bracket; the force unloading mechanism is arranged parallel to the mounting bracket; one end of the force transmission rod is hinged to the force transmission slider, and the other end is hinged to the force unloading mechanism, so that the first bracket, the force unloading mechanism, and the force transmission rod form a triangular structure; The secondary buffer assembly further includes an adjustment assembly, and the adjustment assembly includes: A fitting with a through hole opened inside. The force transmission rod passes through the through hole and is clamped with the fitting; An adjustment slider slidably connected to the first bracket, An adjustment rod with one end hinged to the fitting; and the other end hinged to the adjustment slider; The buffer device further includes a contact block that is force-transmission connected to the primary buffer assembly; The primary buffer assembly includes a folding assembly and a force guiding assembly that are sequentially connected for force transmission. The force-receiving end of the folding assembly is connected to the contact block, and the force-transmission end of the force guiding assembly is connected to the force transmission slider through the connecting arm.

2. The buffer device according to claim 1, Characterized in that, The force unloading mechanism includes: A force unloading box with a cavity inside and connected to the first bracket; A force unloading guide block slidably connected to the mounting bracket and hinged to the force transmission rod; A force unloading rod with one end connected to the force unloading guide block and the other end passing through the cavity of the force unloading box and slidably connected to the force unloading box; A first spring with one end acting on the force unloading rod and the other end acting on the cavity wall of the force unloading box.

3. The buffer device according to claim 1, Characterized in that, The force guiding assembly includes: A second bracket connected to the force transmission slider through the connecting arm; A guiding rod installed on the second bracket; A force guiding slider sleeved on the guiding rod and slidably connected to the guiding rod, and the force guiding slider is connected to the force-transmission end of the folding assembly; A second spring with one end acting on the second bracket and the other end acting on the force guiding slider.

4. The buffer device according to claim 3, Characterized in that, The folding assembly includes: A force guiding member connected to the contact block; A folding rod with one end hinged to the force guiding slider and the other end hinged to the force guiding member.

5. The buffer device according to any one of claims 1-3, Characterized in that, The connecting arm is misaligned with the force transmission slider. The force transmission slider is hinged to the force transmission rod, and the hinge position is opposite to the transition position of the connecting arm and the force transmission slider. The connecting arm is parallel to the first bracket.

6. The buffer device according to claim 1, Characterized in that, The contact block is a rubber block.

7. A vehicle, Characterized in that, It includes: A steering drive shaft; The buffer device according to any one of claims 1-6, wherein the mounting bracket is connected to the end of the steering drive shaft.

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