Three-stage bidirectional buffering traction device

Abstract

The utility model discloses a three-stage bidirectional buffering traction device which comprises a trailer ring, a support and a reset spring. According to the three-stage bidirectional buffering traction device, the supporting plates are arranged on the outer sides of the two supports, and the locking screw rod is arranged between the two supporting plates; a fixing groove is formed in the outer side of each support, a buffer pad is arranged in each fixing groove, and a locking screw is arranged on each buffer pad to lock the buffer pad in the corresponding fixing groove; when the buffer cushion is dragged and moved on a vehicle, the buffer cushion can be firmly fixed in the buffer cushion and cannot fall off in the shock absorption process. And a wear-resistant sleeve is arranged between the support and the shaft body, so that effective operation of two-stage buffering is ensured, the phenomenon of clamping stagnation is avoided, and after three-stage buffering is added, the abrasion of parts is reduced, the noise is reduced, and lubricating grease is not added, so that quick and stable all-weather lubricating service is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer traction accessories, in particular to a three-stage bidirectional buffer traction device. Background Art

[0002] In the field of trailer towing technology, the bidirectional multi-stage buffer towing device disclosed in the prior art is only in the experimental stage. For example, the bidirectional multi-stage buffer towing device disclosed in the utility model patent with publication number CN214267292U has many technical problems in experimental verification. The first is that because all parts of the primary and secondary buffers are not fixed, the separate components are in a free state during assembly. This free state affects assembly accuracy and efficiency, and it is very easy for the rubber parts of the primary buffer to fall out during long-term operation. Eventually, due to frequent collisions and squeezing, the buffer rubber parts are crushed, causing the stopper sleeve to rotate freely without restraint, resulting in functional instability and operating noise. Furthermore, in the prior art, the shaft of the towing ring is lubricated by lubricating oil applied during assembly. However, in humid environments or under poor road conditions, it is very easy to cause jamming and rusting due to road conditions and climate. Moreover, this assembly structure needs to be disassembled during maintenance, making it difficult to achieve the purpose of application in all weather, all regions, and all road conditions.

[0003] In view of the shortcomings of the existing technology, as technicians in this industry, the technical problem that needs to be solved urgently is: how to design a three-level bidirectional buffer traction device through technical improvements, the purpose of which is to improve the shortcomings of the existing buffer rubber parts that are easy to damage, difficult to maintain, and have poor lubricity. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the utility model provides a three-stage bidirectional buffer traction device, which adds a fixing scheme of the first-stage buffer and the second-stage buffer on the basis of the bidirectional buffer concept, ensures the effective operation of the two-stage buffer, and ensures that no jamming occurs when no foreign matter enters, and then adds a third-stage buffer to reduce component wear and reduce noise.

[0005] A three-stage bidirectional buffer traction device includes a trailer ring, a support, and a return spring; the trailer ring includes an end hanging hole and a shaft body, the shaft body passes through each support and is locked at the end by a fixing pin or a locking nut;

[0006] There are two supports that are spaced apart, and the return spring is arranged between the two supports;

[0007] The outer sides of the two supports are provided with support plates, and a locking screw is provided between the two support plates;

[0008] Each support is provided with a fixing groove on the outside, a buffer pad is provided in the fixing groove, and a locking screw is provided on the buffer pad to lock the buffer pad in the fixing groove;

[0009] A wear-resistant sleeve is provided between the support and the shaft body, and the wear-resistant sleeve is a glass fiber reinforced sleeve.

[0010] An inner cavity is provided inside the support, a wear-resistant sleeve is embedded in the inner cavity, and the wear-resistant sleeve is linked to the support.

[0011] A guide sleeve is provided between the two supports on the outside of the shaft body. The length of the guide sleeve is shorter than the distance between the two supports. When the three-stage bidirectional buffer traction device is used for shock absorption and buffering, there is a buffer margin.

[0012] The beneficial effects of the present invention are as follows: the present invention includes a trailer ring, a support, and a return spring; the three-stage bidirectional buffer traction device is provided with support plates on the outside of both supports, and a locking screw is provided between the two support plates; each support is provided with a fixing groove on the outside, a buffer pad is provided in the fixing groove, and a locking screw is provided on the buffer pad to lock the buffer pad in the fixing groove; when towing and moving on the vehicle, the buffer pad can be firmly fixed inside and will not fall out during the shock absorption process. A wear-resistant sleeve is provided between the support and the shaft body to ensure the effective operation of the two-stage buffer and prevent jamming. The addition of the three-stage buffer reduces component wear and noise, and eliminates the need for grease, thereby achieving fast and stable all-weather lubrication service. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 3 Schematic diagram of the support plate structure;

[0016] In the attached figure, 1, trailer ring, 2, left support, 21, support chassis, 22, fixing groove, 23, right support, 24, locking screw, 3, support plate, 4, buffer pad, 5, return spring, 6, guide sleeve, 7, locking screw, 8, spacer, 9, spring washer, 10, locking nut, 11, center locking nut, 12, fixing pin, 13, end hanging hole, 14, wear-resistant sleeve, 15, shaft body. DETAILED DESCRIPTION

[0017] As shown in the figure, the utility model adds fixings on the basis of the original two-way buffer concept to ensure the effective operation of the two-stage buffer and ensure that there will be no jamming when no foreign matter enters. Then, the three-stage buffer is added to reduce the wear of parts, reduce noise, avoid adding grease and achieve stable all-weather service.

[0018] Example 1:

[0019] A three-stage bidirectional buffer traction device has the same basic structure as that in the prior art, which includes a trailer ring 1, a left support 2 and a right support 23, and a return spring 5; the trailer ring 1 includes an end hanging hole 13 and an axle 15, the axle 15 passes through each support and is locked at the end by a fixing pin 12 and a locking nut 10; the left support 2 and the right support 23 are arranged at intervals, the return spring 5 is arranged between the two supports and the return spring 5 covers the axle 15.

[0020] The utility model is provided with support plates 3 on the outer sides of the left support 2 and the right support 23, and a locking screw 7 is provided between the two support plates 3; in this embodiment, the outer sides of the left support 2 and the right support 23 refer to the left side of the left support 2 and the right side of the right support 23 respectively.

[0021] The improvement focus of the present utility model is:

[0022] The outer sides of the left support 2 and the right support 23 are both provided with a fixing groove 22, and the bottom of the fixing groove 22 is provided with a threaded hole. A buffer pad 4 is provided in the fixing groove 22, and a locking screw 24 is provided on the buffer pad 5 to lock the buffer pad 5 in the fixing groove 22; when towing and moving on the vehicle, during the shock absorption process, the buffer pad 5 can be firmly fixed inside the fixing groove 22 and will not fall out, causing the buffer pad to fail in function or even cause problems such as unstable operation and noise.

[0023] The inner diameters of the left and right supports 2 and 23 are provided with cavities, within which wear-resistant sleeves 14 are embedded. These sleeves 14 are fixed to the periphery of the shaft 15. To enhance the wear resistance of the present invention, these sleeves 14 utilize fiberglass-reinforced bushings. Because they provide an interference fit within the inner cavities, they interact with the left and right supports 2 and 23. This interaction is limited to axial movement. When the relative distance between the left and right supports 2 and 23 changes, the sleeves 14 ensure effective two-stage buffering.

[0024] The utility model adopts a buffer pad 5 as a primary buffer, a return spring 5 as a secondary buffer, and adds a wear-resistant sleeve 14 as a tertiary buffer, which improves the shock absorption effect, reduces wear of parts and components, and reduces noise. The wear-resistant sleeve 14 is grease-free, easy to assemble and maintain, and can achieve fast and stable all-weather service.

[0025] Furthermore, a guide sleeve 6 is disposed outside the shaft 15, between the left support 2 and the right support 23. The guide sleeve 6 is shorter than the distance between the left support 2 and the right support 23, providing a buffer margin when the three-stage bidirectional buffering and traction device is performing shock absorption and buffering. This structural arrangement constrains the entire buffering action to axial movement, effectively preventing radial relative movement and improving the operational stability of the device.

[0026] In summary, the utility model has stable structural performance, good buffering effect, and is easy to assemble and maintain, and is an ideal three-level bidirectional buffering traction device.

Claims

1. A three-stage bidirectional buffer traction device, characterized by: It includes a trailer ring, a support, and a return spring; the trailer ring includes an end hanging hole and a shaft body, the shaft body passes through each support and is locked at the end by a fixing pin or a locking nut; it is characterized by: There are two supports that are spaced apart, and the return spring is arranged between the two supports; The outer sides of the two supports are provided with support plates, and a locking screw is provided between the two support plates; Each support is provided with a fixing groove on its outer side, a buffer pad is provided in the fixing groove, and a locking screw is provided on the buffer pad to lock the buffer pad in the fixing groove; A wear-resistant sleeve is provided between the support and the shaft body.

2. The three-stage bidirectional buffer traction device according to claim 1, characterized in that: The wear-resistant sleeve adopts a glass fiber reinforced bushing.

3. The three-stage bidirectional buffer traction device according to claim 1, characterized in that: An inner cavity is provided inside the support, the wear-resistant sleeve is embedded in the inner cavity, and the wear-resistant sleeve is linked to the support.

4. The three-stage bidirectional buffer traction device according to claim 1, characterized in that: A guide sleeve is provided on the outside of the shaft body between the two supports, and the length of the guide sleeve is shorter than the distance between the two supports.

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