cushioning device

Abstract

The application belongs to the technical field of rail vehicles and provides a buffer device. A buffer housing forms a housing cavity, one end of the housing cavity forms an opening; a buffer element is arranged in the housing cavity, a force transmission component is connected to the buffer element and extends to the outside of the housing cavity through the opening; an anti-rotation component is installed between the end face of the opening of the housing cavity and the force transmission component, and is movably connected to the force transmission component, so as to limit the relative rotation of the buffer housing and the buffer unit and enable the anti-rotation component to move along the axial direction of the buffer device with the buffer housing. The buffer device provided by the application is installed between the buffer housing and the buffer unit. The anti-rotation component is installed between the end face of the opening of the housing cavity and the force transmission component, thereby saving the installation space, reducing the radial space occupied by the whole device and breaking through the installation limitation of the compact space.

Description

Technical Field

[0001] This application relates to the field of rail transit technology, and specifically to a buffer device. Background Technology

[0002] As a key intermediate connecting component of the coupler system, the buffer device is hinged to the installation and suspension system at one end and connected to the coupling system through a snap ring at the other end. Its main function is to transmit the train's traction force and mitigate the impact load generated during operation.

[0003] When a train is subjected to various working conditions such as non-axial forces, curved tracks, and unstable tracks, the buffer housing and buffer unit may rotate relative to each other.

[0004] Slow rotational misalignment or high-frequency fretting occurs between the buffer housing and the buffer. Long-term cumulative relative rotation between the buffer housing and the buffer can lead to: wear of internal components, such as spring misalignment and uneven rubber aging; seal failure, such as in the case of gas-liquid buffers, relative rotation can cause the seal ring to twist and leak oil; functional degradation, resulting in decreased energy absorption efficiency of the buffer, or even jamming.

[0005] Therefore, a solution needs to be proposed to address the problem of relative rotation between the buffer housing and the buffer. Summary of the Invention

[0006] The purpose of this application is to solve one of the above-mentioned technical problems and to provide a buffer device.

[0007] To achieve the above objectives, the first aspect of this application provides a buffer device, the technical solution of which is: The first aspect of this application provides a buffer device, comprising: Buffer housing: forms a housing cavity, with an opening at one end of the housing cavity; Buffer unit: includes a buffer element and a force transmission component. The buffer element is disposed inside the housing cavity, and the force transmission component is connected to the buffer element and extends to the outside of the housing cavity through the opening. Anti-rotation components; The anti-rotation component is installed between the end face of the opening of the housing cavity and the force transmission component, wherein it is movably connected to the force transmission component, and can limit the relative rotation between the buffer housing and the buffer unit, and enable the anti-rotation component to move along the axial direction of the buffer device with the buffer housing.

[0008] In this embodiment, an anti-rotation component is installed between the buffer housing and the buffer unit. The anti-rotation component is installed on the end face of the opening of the housing cavity and between the force transmission component, saving installation space and reducing the overall radial space occupied by the device, thus overcoming the installation limitations of a compact space. The anti-rotation component restricts the relative rotation of the buffer and the traction rod, but does not restrict their axial movement, ensuring the force transmission of the traction rod under collision or tension conditions. This structure avoids the impact of adding the anti-rotation component on the buffering function.

[0009] In conjunction with the first aspect, in one possible implementation of the first aspect, an extension is provided on the end face of the opening of the housing cavity, and the anti-rotation component is fixedly installed on the extension.

[0010] In this embodiment, the extension design facilitates the installation of the anti-rotation component. The extension design solves the problem of installing the anti-rotation component at the open end of the buffer housing, without occupying radial space, thus making the overall structure of the buffer device more compact.

[0011] In conjunction with the first aspect, in one possible implementation of the first aspect, the anti-rotation component is mounted on the surface of the extension toward the force transmission component.

[0012] In this embodiment, since there is a gap between the extension and the force transmission component, the anti-rotation component and the mounting end of the buffer housing are installed at the gap, which effectively utilizes the installation space and makes the overall structure of the buffer device more compact.

[0013] In conjunction with the first aspect, in one possible implementation of the first aspect, the force transmission component is provided with a mounting portion forming a mounting groove, the mounting groove being arranged along the axial direction of the buffer device, and the anti-rotation component and the force transmission component cooperating mounting portion being located within the mounting groove.

[0014] In this embodiment, the structure of the mounting groove provides mounting space for the anti-rotation component and confines the anti-rotation component within the mounting space of the mounting groove, thereby limiting the relative rotation between the anti-rotation component and the buffer housing.

[0015] In conjunction with the first aspect, one possible implementation of the first aspect further includes a cover plate that can be installed on the end face of the mounting portion, and when the cover plate is installed on the mounting portion, a gap is formed between the cover plate and the mounting groove, and the mating mounting portion of the anti-rotation component and the force transmission component is located within the gap.

[0016] In this embodiment, the cover plate can fix the anti-rotation component, restrict the anti-rotation component within the gap, and does not affect the axial movement requirement of the anti-rotation component.

[0017] In conjunction with the first aspect, in one possible implementation of the first aspect, the mounting portion is detachably mounted on the force transmission component.

[0018] In this embodiment, the mounting part is designed as a detachable structure, facilitating its replacement. The installation problem can be solved simply by providing mounting holes on the force transmission component, without requiring more complex modifications to the structure of the force transmission component.

[0019] In conjunction with the first aspect, in one possible implementation of the first aspect, the surface of the mounting part that mates with the force transmission component can conform to the outer surface of the force transmission component.

[0020] In this embodiment, the surfaces of the mounting part and the force transmission component are in close contact with each other, which can ensure the stability of the connection structure between the two.

[0021] In conjunction with the first aspect, in one possible implementation of the first aspect, the buffer device further includes an end nut, which is mounted on the open end of the buffer housing.

[0022] In this embodiment of the application, the open end of the buffer housing can be closed by setting an end nut.

[0023] In conjunction with the first aspect, in one possible implementation of the first aspect, an end nut mounting groove is provided on the end face of the end nut facing the outside of the housing cavity, and a housing groove is provided on the end face of the opening of the housing cavity. When the end nut is installed with the buffer housing, the end nut mounting groove is opposite to the housing groove; it also includes a limiting block: The limiting block can be installed into the end nut mounting slot and is locked in the housing slot; or, The limiting block can be installed into the housing groove and is engaged in the nut mounting groove at the end of the housing groove.

[0024] In this embodiment, the relative rotation between the buffer housing and the buffer unit can be further restricted by the cooperation of the end nut mounting groove, the housing groove, and the limiting block.

[0025] In conjunction with the first aspect, in one possible implementation of the first aspect, the end nut mounting slot includes a plurality of slots, the housing slot includes at least two slots, each housing slot is positioned opposite to an end nut mounting slot, and a limiting block is provided at each housing slot.

[0026] In this embodiment, multiple sets of end nut mounting slots, housing slots, and limiting blocks can be designed as needed and arranged at multiple locations to improve the reliability of the anti-rotation mating structure.

[0027] The second aspect of this application provides a rail vehicle including the buffer device provided in the first aspect of this application.

[0028] Applying the buffer device provided in the first aspect of this application to rail vehicles can improve the reliability of the vehicle buffer device.

[0029] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this application more apparent, specific embodiments of this application are given below. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a buffer device with an anti-rotation plate in the prior art.

[0031] Figure 2 This is a cross-sectional structural diagram of a buffer device with an anti-rotation plate in the prior art.

[0032] Figure 3 This is a schematic diagram of an anti-rotation plate structure with a buffer device in the prior art.

[0033] Figure 4 This is a schematic diagram of the buffer device structure in an embodiment of this application.

[0034] Figure 5 This is a cross-sectional view of the buffer device in an embodiment of this application.

[0035] Figure 6 This is a schematic diagram of the force transmission component structure in an embodiment of this application.

[0036] Figure 7 This is a schematic diagram of the anti-rotation plate structure in an embodiment of this application.

[0037] Figure 8 This is a schematic diagram of the installation part structure in an embodiment of this application.

[0038] Figure 9 This is a schematic diagram of the buffer housing structure in an embodiment of this application.

[0039] Figure 10 This is a schematic diagram of the end nut structure in an embodiment of this application.

[0040] 1. Buffer housing; 101. Housing cavity; 102. Open end face; 103. Extension; 104. Housing groove; 2. Force transmission components, 201. Mounting groove, 202. Mounting part, 2021. U-shaped groove, 2022. Arc-shaped surface, 203. Fixing hole; 3. Anti-rotation plate, 301, insert slot; 4. Buffer elements; 5. Cover plate; 6. End nut; 601. End nut mounting slot; 7. Limit block. Detailed Implementation

[0041] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0042] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] To ensure the proper functioning of the coupler and address the issue of relative rotation between the buffer housing and the buffer unit, some buffer devices are equipped with anti-rotation structures. This key external anti-rotation structure effectively limits the relative rotational tendency between the buffer housing and the buffer, thereby avoiding potential malfunctions caused by rotation.

[0044] like Figures 1 to 3 This is a schematic diagram of the anti-rotation structure of a buffer device in the prior art.

[0045] An anti-rotation component is installed between the buffer housing 1 and the force transmission component 2. The anti-rotation component is an anti-rotation plate 3, with one end mounted on the surface of the buffer housing 1 and the other end mounted on the surface of the force transmission component 2. Due to the height difference between the surfaces of the buffer housing 1 and the force transmission component 2, the anti-rotation plate 3 adopts a three-section bending structure. The three sections are welded together. To solve the installation problem between the anti-rotation plate 3 and the buffer housing 1, an extension 103 is provided on the buffer housing 1, and the anti-rotation plate 3 is fixedly installed on the extension 103. To simplify the installation structure, a rectangular mounting groove 201 is opened on the force transmission component 2, and mounting holes are provided at the mounting groove 201. The anti-rotation plate 3 is usually directly installed on the force transmission component 2.

[0046] Under complex working conditions with limited space, high load, and high torque, the existing external anti-rotation structure design of the buffer device still has significant defects: 1. Insufficient structural reliability and manufacturability: The anti-rotation plate 3 is made of three steel plates welded together, which makes the welding process difficult to control and results in low structural reliability; 2. Reduced load-bearing capacity of the traction component: The retaining ring connection end of the force transmission component 2 is a circular tubular structure. To achieve the anti-rotation function, the installation groove 201 needs to be machined, which seriously weakens its effective cross section for bearing longitudinal force and makes it difficult to adapt to high load conditions; 3. Insufficient torsional resistance: Due to the small diameter of the retaining ring connection end (traction part) of the force transmission component 2 and the large diameter of the buffer housing 1, the radial span required for the installation of the anti-rotation plate 3 is large, resulting in insufficient torsional stiffness and difficulty in coping with high torque conditions.

[0047] To address the above problems, the first aspect of this application improves the anti-rotation structure and provides a novel buffer device.

[0048] like Figures 4 to 5 As shown, the buffer housing 1 forms a housing cavity 101, with an opening at one end. The buffer unit includes a buffer element 4 and a force transmission component 2. The buffer element 4 is disposed within the housing cavity 101, and the force transmission component 2 is connected to the buffer element 4 and extends through the opening of the housing cavity 101 to the outside of the housing cavity 101. This is the main structure of the buffer device, which is the same as the prior art and will not be described in detail further.

[0049] The buffer device provided in this application embodiment also includes an anti-rotation component, which is installed between the buffer housing 1 and the force transmission component 2.

[0050] Unlike existing technologies, the anti-rotation component and the mounting end of the buffer housing 1 provided in this application embodiment are no longer mounted on the surface of the buffer housing 1.

[0051] An anti-rotation component is installed between the open end face 102 of the housing cavity 101 and the force transmission component 2. It is movably connected to the force transmission component 2, which can limit the relative rotation between the buffer housing 1 and the buffer unit, and enable the anti-rotation component to move along the axial direction of the buffer device with the buffer housing 1.

[0052] The anti-rotation component can adopt a plate-like structure, namely anti-rotation plate 3.

[0053] Specifically, the anti-rotation feature described in this application refers to the relative rotation between the buffer housing 1 and the force transmission component 2. The function of the anti-rotation component is to restrict the relative rotation between the two. Since the force transmission component 2 needs axial relative movement with the buffer housing 1 to compress the buffer element 4 during the buffering process and achieve the buffering function, in order to ensure the buffering function is achieved, in one specific implementation, the anti-rotation component is fixedly connected to the buffer housing 1 and movably connected to the force transmission component 2. An anti-rotation component mounting structure is provided on the force transmission component 2. This anti-rotation component mounting structure can restrict the relative rotation between the buffer housing 1 and the force transmission component 2, but allows the force transmission component 2 to have axial movement freedom.

[0054] In this embodiment, the mounting structure between the anti-rotation component and the buffer housing 1 is improved. The anti-rotation component is mounted on the end face of the opening of the housing cavity 101 and between the force transmission component 2, saving installation space and reducing the overall radial space occupied by the device.

[0055] In some embodiments of this application, reference is made to Figure 9To facilitate the installation of the anti-rotation component, an extension 103 is provided on the open end face 102 of the housing cavity 101, and the anti-rotation component is fixedly installed on the extension 103. Exemplarily, the extension 103 and the buffer housing 1 are an integral structure, or the extension can be installed to the open end face 102 of the housing cavity 101 by welding or other methods. In one specific implementation, the extension 103 is plate-shaped, with mounting holes opened on the extension 103, and the anti-rotation plate is installed on the extension 103 by fasteners.

[0056] For example, refer to Figure 9 The extension 103 can be designed as a slide plate base structure, fixing the extension 103 to the open end of the buffer housing 1 with a smaller radial dimension, effectively reducing the overall radial space occupied by the buffer device and improving adaptability. At the mating end of the anti-rotation plate 3 and the extension 103, the anti-rotation plate 3 is designed with an insertion slot 301. The shape and size of the extension 103 match the insertion slot 301, and the extension 103 is inserted into the insertion slot 301 and fixed by a fastener.

[0057] Typically, the buffer housing 1 and the force transmission component 2 are cylindrical. In order to adapt to the mating structure between the two, the extension 103 can be designed to have the same curvature as the buffer housing 1.

[0058] The design of the extension 103 facilitates the installation of the anti-rotation component. By extending the extension 103, the problem of installing the anti-rotation component at the open end of the buffer housing 1 is solved, without occupying radial space of the housing, making the overall structure of the buffer device more compact. Compared to mounting on the surface of the buffer housing 1, the height difference between the open end face 102 and the force transmission component 2 is reduced, allowing the anti-rotation plate 3 to be a flat plate. Compared to existing technologies, the anti-rotation plate 3 is changed from a welded structure to a one-piece molding process, eliminating weak points in the welds, improving the strength of the anti-rotation plate 3, and enhancing the reliability of the structure. Because the anti-rotation plate 3 is flat, its radial span is reduced, improving torsional resistance and meeting the requirements of high torque conditions.

[0059] In some embodiments of this application, the anti-rotation component is mounted on the surface of the extension facing the force transmission component 2. It should be understood that the surface on which the anti-rotation plate 3 is mounted is the inner surface of the extension 103, and this side surface has a smaller height difference with the force transmission component 2, thus allowing the anti-rotation plate 3 to be a flat plate. This makes the overall structure of the buffer device more compact.

[0060] In some embodiments of this application, in order to solve the problem of installation between the anti-rotation plate 3 and the force transmission component 2, a mounting part 202 is provided on the force transmission component 2.

[0061] In one possible implementation, the mounting part adopts a block structure, and a fixing hole 203 is provided at the mounting position on the force transmission component 2. The mounting part can be detachably mounted on the force transmission component 2, facilitating its replacement. It should be understood that, to ensure better installation of the mounting part with the force transmission component 2, the surface of the mounting part that mates with the force transmission component 2 is designed to conform to the surface shape of the force transmission component 2. For example, if the force transmission component 2 is a cylinder, the surface of the mounting part that mates with the force transmission component 2 is designed as an arc-shaped surface 2022. This design ensures better fit between the two and improves the reliability of the installation structure.

[0062] refer to Figure 8 The mounting section forms a mounting groove 201, which is a U-shaped groove 2021. The mounting groove 201 is arranged along the axial direction of the buffer device, and the mating mounting part of the anti-rotation component and the force transmission component 2 is located within the mounting groove 201. In order to ensure that the buffer housing 1 and the force transmission component 2 can move relative to each other in the axial direction, the mounting groove 201 needs to form a through structure in the axial direction of the buffer device. Based on this structure, since the mounting groove 201 forms a limiting wall in the direction that ensures the relative rotation of the buffer housing 1 and the force transmission component 2, the relative rotation of the two can be restricted.

[0063] In some embodiments of this application, the height of the U-shaped groove 2021 can be designed to match the height of the bottom of the extension 103, which can maximize the ability of the flat anti-rotation plate 3 to accommodate the installation of the force transmission component 2 and the buffer housing 1.

[0064] Based on the above structure, the mounting groove 201 provides installation space for the anti-rotation component and confines it within the mounting space of the mounting groove 201, thereby limiting the relative rotation between the anti-rotation plate 3 and the buffer housing 1. Compared with the prior art, the groove structure is no longer directly machined on the force transmission component 2, which avoids weakening the cross-section of the force transmission component 2 and ensures high load-bearing capacity.

[0065] Since there is a risk of the anti-rotation plate 3 falling out if it is directly installed in the mounting groove 201, in order to solve this problem, a cover plate 5 is added to the mounting groove 201. The cover plate 5 can be installed on the end face of the mounting part, and when the cover plate 5 is installed in the mounting part, a gap is formed between the cover plate 5 and the mounting groove 201, and the mating part of the anti-rotation component and the force transmission component 2 is located in the gap.

[0066] In this embodiment, the cover plate 5 can fix the anti-rotation component, restrict the anti-rotation plate 3 within the gap, and does not affect the axial movement of the anti-rotation component. At the same time, it solves the risk of the anti-rotation plate 3 falling out of the mounting groove 201 and improves the reliability of the buffer device.

[0067] In some embodiments of this application, the buffer device further includes an end nut 6, which is mounted on the open end of the buffer housing 1. The structure of the end nut is shown in the reference diagram. Figure 10 .

[0068] In this embodiment, the opening of the buffer housing 1 can be closed by providing the end nut 6. The outer peripheral wall of the end nut 5 is provided with external threads, and the opening of the buffer housing 1 is provided with internal threads, and the end nut 6 and the buffer housing 1 are threadedly connected. The force transmission component 2 passes through the opening in the center of the end nut 6 and enters the interior of the buffer housing 1.

[0069] In some embodiments of this application, an end nut mounting groove 601 is provided on the end face of the end nut 6 facing the outside of the housing cavity 101, and a housing groove 104 is provided on the end face of the opening of the housing cavity 101. When the end nut 6 is installed with the buffer housing 1, the end nut mounting groove 601 is opposite to the housing groove.

[0070] To further facilitate the relative rotation between the buffer housing 1 and the force transmission component 2, a limiting block 7 is provided at the mating position of the end nut mounting groove 601 and the housing groove 104.

[0071] The limit block 7 can be installed in multiple ways.

[0072] In the first installation method, the limiting block 7 can be installed into the end nut mounting slot 601 and locked into the housing slot 104. For example, after the end nut 6 is installed in place, ensure that the position of the end nut mounting slot 601 is aligned with the position of the housing slot 104, insert the limiting block 7 between the two slots, and fix the limiting block 7 to the end nut mounting slot 601 with bolts.

[0073] In the second installation method, the limiting block 7 can be installed into the housing groove 104 and locked in the end nut mounting groove 601 of the housing groove 104. For example, after the end nut 6 is installed in place, ensure that the position of the end nut mounting groove 601 is aligned with the position of the housing groove 104, insert the limiting block 7 between the two grooves, and fix the limiting block 7 to the housing groove 104 with bolts.

[0074] Both of the above methods can limit the relative rotation between the buffer housing 1 and the force transmission component 2 by combining the end nut mounting groove 601, the housing groove 104 and the limiting block 7.

[0075] To improve structural reliability, multiple end nut mounting slots 601 are included, and at least two housing slots 104 are included. Each housing slot 104 is positioned opposite to one end nut mounting slot 601, and a limiting block 7 is provided at each housing slot 104. In a preferred embodiment, the housing slots 104 are symmetrically arranged on the open end face 102 of the buffer housing. The relatively large number of end nut mounting slots 601 can improve the matching of the positions of the end nut mounting slots 601 and the housing slots 104, ensuring that after the end nut 6 is rotated into place, there is a suitable end nut mounting slot 601 matching the housing slot 104.

[0076] In this embodiment, multiple sets of mating structures for end nut mounting grooves 601, housing grooves 104, and limiting blocks 7 can be designed as needed and arranged at multiple positions, which can improve the reliability of the anti-rotation mating structure.

[0077] The second aspect of this application also provides a rail vehicle, including the buffer device provided in the first aspect of this application. Using the buffer device provided in the first aspect of this application in a rail vehicle can improve the reliability of the rail vehicle's buffer device function.

[0078] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A buffer device, characterized in that, include: Buffer housing: forms a housing cavity, with an opening at one end of the housing cavity; Buffer unit: includes a buffer element and a force transmission component. The buffer element is disposed inside the housing cavity, and the force transmission component is connected to the buffer element and extends to the outside of the housing cavity through the opening. Anti-rotation components; The anti-rotation component is installed between the end face of the opening of the housing cavity and the force transmission component, wherein it is movably connected to the force transmission component, and can limit the relative rotation between the buffer housing and the buffer unit, and enable the anti-rotation component to move along the axial direction of the buffer device with the buffer housing.

2. The buffer device as described in claim 1, characterized in that, An extension is provided on the end face of the opening of the housing cavity, and the anti-rotation component is fixedly installed on the extension.

3. The buffer device as described in claim 2, characterized in that, The anti-rotation component is mounted on the surface of the extension facing the force transmission component.

4. The buffer device as described in claim 1, characterized in that, The force transmission component is provided with a mounting part, which forms a mounting groove. The mounting groove is arranged along the axial direction of the buffer device, and the anti-rotation component and the mating mounting part of the force transmission component are located in the mounting groove.

5. The buffer device as described in claim 4, characterized in that, It also includes a cover plate that can be installed on the end face of the mounting part, and when the cover plate is installed on the mounting part, a gap is formed between the cover plate and the mounting groove, and the mating part of the anti-rotation component and the force transmission component is located within the gap.

6. The buffer device as described in claim 4 or 5, characterized in that, The mounting part can be detachably mounted on the force transmission component.

7. The buffer device as described in claim 6, characterized in that, The surface of the mounting part that mates with the force transmission component can fit against the outer surface of the force transmission component.

8. The buffer device as claimed in claim 1, characterized in that, It also includes an end nut, which is installed at the open end of the buffer housing.

9. The buffer device as described in claim 8, characterized in that, The end nut has an end nut mounting groove on its end face facing the outside of the housing cavity, and a housing groove is provided on the end face of the opening of the housing cavity. When the end nut is installed with the buffer housing, the end nut mounting groove is opposite to the housing groove; it also includes a limiting block. The limiting block can be installed into the end nut mounting slot and is locked in the housing slot; or, The limiting block can be installed into the housing groove and is engaged in the nut mounting groove at the end of the housing groove.

10. The buffer device as claimed in claim 9, characterized in that, The end nut mounting slots include multiple slots, and the housing slots include at least two slots. Each housing slot is positioned opposite to one end nut mounting slot, and a limiting block is provided at each housing slot.

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