Spring buffer structure for a piston rod of a shock absorber

Abstract

The present application belongs to the technical field of shock absorber spring support device, and particularly relates to a shock absorber piston rod riveting brake ring spring buffering structure, which comprises a piston rod, a brake ring and a spring. The brake ring comprises an upper connecting part, a lower connecting part and an intermediate support part connecting the upper connecting part and the lower connecting part. The spring is sleeved on the outer part of the upper connecting part and supported on the intermediate support part. A groove is arranged on the position of the piston rod matched with the brake ring in the circumferential direction. The brake ring is sleeved on the piston rod. The end part of the lower connecting part away from the intermediate support part is pressed into the groove by external force, so as to realize the riveting between the brake ring and the piston rod. The present application is used for solving the technical problem that the current tray for supporting the spring is prone to loose welding and easy to fall off.

Description

TECHNICAL FIELD

[0001] The utility model belongs to shock absorber spring support device technical field, concretely relates to a kind of shock absorber piston rod riveting brake ring spring buffer structure. BACKGROUND

[0002] With the development of automobile technology and the increase of new energy vehicle demand, the weight and carrying capacity of automobile are increasingly high;Customer's strength and pull-off force requirement of shock absorber is also increasingly high, in addition to the current host plant double fork arm suspension and air spring application increasingly widely, the connection mode of traditional spring, brake ring and piston rod cannot meet the requirements.

[0003] In the traditional shock absorber, the brake ring sleeved on the piston rod is connected with the piston rod by welding, and the spring is supported on the brake ring, and soft pad is provided at both ends of the spring to reduce the problem of cylinder scraping. However, such connection mode, the brake ring and the piston rod are prone to virtual welding and falling off, which cannot meet the use requirement.

[0004] Therefore, the application designs a buffer structure with brake ring not easy to fall off, to ensure the reliability during use, to meet the use requirement. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a shock absorber piston rod riveting brake ring spring buffer structure to solve the technical problem that the current tray for supporting spring is prone to virtual welding and falling off.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a shock absorber piston rod riveting brake ring spring buffer structure, the buffer structure comprises a piston rod, a brake ring and a spring, the brake ring comprises an upper connecting part, a lower connecting part and an intermediate support part connecting the upper connecting part and the lower connecting part; the spring is sleeved outside the upper connecting part and supported on the intermediate support part; a groove is provided on the piston rod in circumferential direction at the position matched with the brake ring, the brake ring is sleeved on the piston rod, and the end of the lower connecting part away from the intermediate support part is pressed into the groove by external force, to realize riveting between the brake ring and the piston rod.

[0007] Preferably, the lower end face of the intermediate support part adopts a conical surface to improve the bearing stress capacity.

[0008] Preferably, the connection between the conical surface and the lower connecting part adopts a round corner transition.

[0009] Preferably, the lower connecting part adopts a conical shape, and the end with larger outer diameter is connected with the conical surface.

[0010] Preferably, the upper connecting part and the spring are fitted with an interference fit.

[0011] Preferably, the upper connecting part, the intermediate support part, and the lower connecting part are integrally formed.

[0012] Preferably, the end of the spring away from the brake ring is provided with an elastic pad, and the whole spring is T-shaped.

[0013] The beneficial effects of adopting the technical solution of this utility model are as follows: This invention features an annular groove on the piston rod. One end of the brake ring is riveted to the groove by pressing and deforming, thus avoiding the risk of incomplete welding or detachment, improving reliability, and meeting usage requirements. The brake ring includes an upper connecting part, a middle supporting part, and a lower connecting part. A spring is sleeved on the upper connecting part and abuts against the middle supporting part. The upper connecting part is supported between the spring and the piston rod, eliminating the need for additional padding, thereby reducing the probability of parts and assembly errors and lowering costs. Attached Figure Description

[0014] Figure 1 A schematic diagram of an embodiment of a shock absorber piston rod riveted brake ring spring buffer structure; Figure 2 A schematic diagram showing the riveting of the piston rod and brake ring; Figure 3 A partially enlarged view of an embodiment of a shock absorber piston rod riveted brake ring spring buffer structure; Figure 4 A schematic diagram of a brake ring in an embodiment of a piston rod riveted brake ring spring buffer structure for a shock absorber; Figure 5 This is a schematic diagram of the cross-section of the brake ring.

[0015] in, Figures 1-5 In the middle, 100-brake ring, 1-upper connecting part, 11-chamfer, 2-middle support part, 21-conical surface, 22-rounded transition, 3-lower connecting part, 200-spring, 300-piston rod, 301-groove, 400-pad. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments, and do not limit the scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The specific implementation method is as follows: Example 1, as Figures 1-4 As shown, a shock absorber piston rod riveted with brake ring and spring buffer structure is disclosed. The buffer structure includes a piston rod 300, a brake ring 100, a spring 200, and a soft pad 400.

[0020] A groove 301 is provided circumferentially on the piston rod 300 at the position corresponding to the mounting of the brake ring 100. The brake ring 100 includes an upper connecting part 1, a lower connecting part 3, and an intermediate support part 2. The intermediate support part 2 connects the upper connecting part 1 and the lower connecting part 3, and all three are coaxially provided with a through hole for fitting onto the piston rod 300. The brake ring 100 is fitted onto the piston rod 300, and the lower end of the lower connecting part 3 corresponds to the position of the groove 301. The lower end of the lower connecting part 3 is deformed by rolling and riveted into the groove 301 to achieve riveting between the brake ring 100 and the piston rod 300, ensuring a reliable connection and preventing easy detachment due to poor welding.

[0021] The lower end of the spring 200 is fitted over the upper connecting part 1. The upper connecting part 1 isolates the spring from the piston rod 300, reducing the likelihood of cylinder scraping. In traditional structures, a soft pad is required between the brake ring and the spring, with the spring end abutting against the brake ring via the pad. However, this lack of connection between the pad and the brake ring leads to spring swaying during shock absorber operation. The aforementioned upper connecting part 1 eliminates the need for a pad between the brake ring and the spring, reducing the probability of component and assembly errors and lowering costs.

[0022] The brake ring 100 includes an upper connecting part 1, a lower connecting part 3, and an intermediate support part 2. The intermediate support part 2 connects the upper connecting part 1 and the lower connecting part 3, and the three are coaxially provided with a through hole for being sleeved on the piston rod 300.

[0023] In this embodiment, the brake ring 100 is riveted to the piston rod 300, and the spring 200 is sleeved on the piston rod 300 and supported on the brake ring 100. The upper end of the spring 200 is connected to an elastic soft pad 400 that is T-shaped in shape, so as to avoid the phenomenon of cylinder scraping between the spring 200 and the piston rod 300 during the use of the shock absorber.

[0024] In this embodiment, a shock absorber piston rod riveted brake ring spring buffer structure is used. The brake ring 100 is fitted onto the piston rod 300, and the lower end of the upper connecting part 3 deforms and tightens to embed into the groove 301, thus riveting the brake ring 100 onto the piston rod 300. This ensures a secure connection and reduces the possibility of the brake ring falling off, meeting usage requirements. The spring 200 is fitted onto the piston rod 300, with its lower end supported by the intermediate support part 2, thus limiting the spring 200's position. The lower part of the spring 200 is separated from the piston rod 300 by the upper connecting part 1, reducing cylinder scraping and extending the piston rod's service life.

[0025] Furthermore, the intermediate support 2 is used to support the spring 200. A conical surface 21 is adopted on the lower end face of the intermediate support 2 to form a conical support, so as to improve the load-bearing capacity of the brake ring 100 and extend the service life of the entire shock absorber.

[0026] Furthermore, a rounded transition 22 is adopted between the conical surface 21 and the lower connecting part 3 to further enhance the load-bearing capacity of the brake ring 100.

[0027] Furthermore, the lower connecting part 3 adopts a tapered shape, and its larger outer diameter end is connected to the tapered surface 21, so that the intermediate support part 2 and the lower connecting part 3 used to support the spring 200 are tapered as a whole, ensuring load-bearing capacity and preventing spring failure.

[0028] Furthermore, the spring 200 and the upper connecting part 1 are fitted with an interference fit, which can limit the spring 200 to a certain extent and prevent the spring 200 from moving up and down during the operation of the shock absorber, thus avoiding abnormal noise and cylinder scraping problems. In this embodiment, a chamfer 11 is provided at the upper end of the upper connecting part 1 to facilitate the assembly between the spring 200 and the brake ring 100.

[0029] Furthermore, the upper connecting part 1, the middle support part 2, and the lower connecting part 3 are integrally molded, which facilitates processing and avoids the assembly error issues that need to be considered at the connection points that are required for separate designs.

[0030] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A shock absorber piston rod riveted to brake ring and spring buffer structure, the buffer structure comprising a piston rod, a brake ring, and a spring, characterized in that, The brake ring includes an upper connecting part, a lower connecting part, and an intermediate support part connecting the upper connecting part and the lower connecting part; a spring is sleeved on the upper connecting part and supported on the intermediate support part; a groove is provided circumferentially on the piston rod at the position where it mates with the brake ring, the brake ring is sleeved on the piston rod, and the end of the lower connecting part away from the intermediate support part is pressed into the groove by external force to realize the riveting between the brake ring and the piston rod.

2. The shock absorber piston rod riveted brake ring spring buffer structure according to claim 1, characterized in that, The lower end face of the intermediate support is tapered to improve its load-bearing capacity.

3. The shock absorber piston rod riveted brake ring spring buffer structure according to claim 2, characterized in that, The connection between the conical surface and the lower connecting part is rounded.

4. The shock absorber piston rod riveted brake ring spring buffer structure according to claim 3, characterized in that, The lower connecting part adopts a tapered shape, with the end with the larger outer diameter connected to the tapered surface.

5. A shock absorber piston rod riveted brake ring spring buffer structure according to any one of claims 1-4, characterized in that, The upper connecting part and the spring are fitted with an interference fit.

6. A shock absorber piston rod riveted brake ring spring buffer structure according to any one of claims 1-5, characterized in that, The upper connecting part, the middle support part, and the lower connecting part are integrally formed.

7. A shock absorber piston rod riveted brake ring spring buffer structure according to any one of claims 1-5, characterized in that, The end of the spring furthest from the brake ring is provided with an elastic pad, and the whole spring is T-shaped.

Images