Shock absorber piston rod riveting brake ring spring buffer structure

Abstract

The invention belongs to the technical field of shock absorber spring supporting devices, 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, and the brake ring comprises an upper connecting part, a lower connecting part and a middle supporting part connecting the upper connecting part and the lower connecting part; the spring is arranged outside the upper connecting part in a sleeving manner and is supported on the middle supporting part; a circle of groove is formed in the position, matched with the brake ring, of the piston rod in the circumferential direction, the piston rod is sleeved with the brake ring, the end, away from the middle supporting part, of the lower connecting part is pressed into the groove through external force, and riveting between the brake ring and the piston rod is achieved. The tray is used for solving the technical problem that an existing tray used for supporting the spring is prone to insufficient soldering and falling off.

Description

Technical Field

[0001] The present invention belongs to the technical field of shock absorber spring support devices, and particularly relates to a spring buffer structure for riveting a brake ring on a shock absorber piston rod. Background Art

[0002] With the development of automotive technology and the increasing demand for new energy vehicles, the weight and load-bearing capacity requirements of vehicles are getting higher and higher; customers' requirements for the strength and pull-off force of shock absorbers are also increasing. In addition, with the increasing widespread application of double-wishbone suspensions and air springs by current vehicle manufacturers, the traditional connection methods of springs, brake rings, and piston rods can no longer meet the requirements.

[0003] In traditional shock absorbers, the brake ring sleeved on the piston rod is connected to the piston rod by welding. The spring is supported on the brake ring, and soft pads are provided at both ends of the spring to reduce the problem of cylinder scraping. However, with such a connection method, there is a risk of poor welding and detachment between the brake ring and the piston rod, which cannot meet the usage requirements.

[0004] Therefore, this application designs a buffer structure in which the brake ring is not easily detached to ensure the reliability during use to meet the usage requirements. Summary of the Invention

[0005] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a spring buffer structure for riveting a brake ring on a shock absorber piston rod to solve the technical problem that the tray used to support the spring is prone to poor welding and easy detachment.

[0006] To achieve the above purpose, the technical solution of the present invention is: a spring buffer structure for riveting a brake ring on a shock absorber piston rod, which includes a piston rod, a brake ring, and a spring. The brake ring includes an upper connecting portion, a lower connecting portion, and an intermediate supporting portion connecting the upper connecting portion and the lower connecting portion; the spring is sleeved outside the upper connecting portion and supported on the intermediate supporting portion; a groove is provided in a circumferential direction at the position of the piston rod that cooperates with the brake ring. The brake ring is sleeved on the piston rod, and the end of the lower connecting portion away from the intermediate supporting portion is pressed into the groove by an external force to achieve the riveting between the brake ring and the piston rod.

[0007] Preferably, the lower end surface of the intermediate supporting portion is a conical surface to improve the load-bearing capacity.

[0008] Preferably, the connection between the conical surface and the lower connecting portion is provided with a rounded corner transition.

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

[0010] Preferably, an interference fit is adopted between the upper connecting portion and the spring.

[0011] Preferably, the upper connecting part, the middle supporting part and the lower connecting part are integrally arranged.

[0012] Preferably, an elastic soft pad is arranged at the end of the spring away from the brake ring, and the whole is in a T shape.

[0013] The beneficial effects of adopting the technical scheme of the present invention are as follows: The present invention provides an annular groove on the piston rod. One end of the brake ring is riveted to the groove of the piston rod by means of pressing deformation to avoid the risks of virtual soldering and falling off, improve the reliability in use and meet the use requirements. The brake ring includes an upper connecting part, a middle supporting part and a lower connecting part. The spring is sleeved outside the upper connecting part and abuts against the middle supporting part. The upper connecting part supports between the spring and the piston rod, and there is no need to arrange a soft pad, thereby reducing the probability of parts and assembly errors and reducing costs. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of an embodiment of a spring buffer structure for riveting a brake ring on a shock absorber piston rod; Figure 2 It is a schematic diagram of riveting the piston rod and the brake ring; Figure 3 It is a partial enlarged view of an embodiment of a spring buffer structure for riveting a brake ring on a shock absorber piston rod; Figure 4 It is a schematic diagram of a brake ring of an embodiment of a spring buffer structure for riveting a brake ring on a shock absorber piston rod; Figure 5 It is a schematic sectional view of the brake ring.

[0015] Among them, Figures 1-5 in, 100 - brake ring, 1 - upper connecting part, 11 - chamfer, 2 - middle supporting part, 21 - conical surface, 22 - fillet transition, 3 - lower connecting part, 200 - spring, 300 - piston rod, 301 - groove, 400 - soft pad. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments, and do not limit the scope of the present invention.

[0017] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0018] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The specific embodiments are as follows: Embodiment 1, as Figures 1-4 shown, a riveted brake ring spring buffer structure for a shock absorber piston rod. 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 circumferentially provided at a position on the piston rod 300 corresponding to the installation of the brake ring 100. The brake ring 100 includes an upper connecting portion 1, a lower connecting portion 3, and an intermediate supporting portion 2. The intermediate supporting portion 2 connects the upper connecting portion 1 and the lower connecting portion 3, and the three are coaxially provided with through holes for sleeving on the piston rod 300. The brake ring 100 is sleeved on the piston rod 300, and the lower end of the lower connecting portion 3 corresponds to the position of the groove 301. The rolling method is used to deform the lower end of the lower connecting portion 3 and rivet it in the groove 301 to realize the riveting between the brake ring 100 and the piston rod 300, ensure the connection reliability, and avoid the phenomenon of easy detachment due to poor soldering.

[0021] The lower end of the spring 200 is sleeved outside the upper connecting portion 1. Under the isolation of the upper connecting portion 1, it does not contact the piston rod 300, reducing the phenomenon of cylinder scraping. Since in the traditional structure, a soft pad needs to be provided between the brake ring and the spring, and the end of the spring abuts against the brake ring through the soft pad, and there is only contact but no connection between the soft pad and the brake ring, the phenomenon of the spring moving up and down easily occurs during the use of the shock absorber. The above setting of the upper connecting portion 1 saves the trouble of adding a soft pad between the brake ring and the spring, thereby reducing the probability of parts and assembly errors and lowering the cost.

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

[0023] In this embodiment, the brake ring 100 is riveted to the piston rod 300. 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 the elastic cushion pad 400 which is integrally T-shaped, avoiding the phenomenon of cylinder scraping between the spring 200 and the piston rod 300 during the use of the shock absorber.

[0024] When the shock absorber piston rod riveted brake ring spring buffer structure in this embodiment is in use, the brake ring 100 is sleeved on the piston rod 300. The lower end of the upper connecting portion 3 is deformed and tightened and embedded into the groove 301 to rivet the brake ring 100 on the piston rod 300, ensuring the reliability of the connection between the two and reducing the phenomenon of the brake ring falling off to meet the use requirements. The spring 200 is sleeved on the piston rod 300, and the lower end is supported on the intermediate supporting portion 2 to complete the limit of the spring 200. The lower part of the spring 200 is separated from the piston rod 300 through the upper connecting portion 1, reducing the phenomenon of cylinder scraping and prolonging the service life of the piston rod.

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

[0026] Furthermore, a fillet transition 22 is adopted between the conical surface 21 and the lower connecting portion 3 to further improve the bearing capacity of the brake ring 100.

[0027] Furthermore, the lower connecting portion 3 adopts a conical style, and the end with the larger outer diameter thereof is connected to the conical surface 21, so that the intermediate supporting portion 2 and the lower connecting portion 3 for supporting the spring 200 are integrally conical, ensuring the bearing capacity and avoiding spring failure.

[0028] Furthermore, an interference fit is adopted between the spring 200 and the upper connecting portion 1, which can limit the spring 200 to a certain extent and avoid the problems of abnormal noise and cylinder scraping caused by the up and down movement of the spring 200 during the operation of the shock absorber. In this embodiment, a chamfer 11 is provided at the upper end of the upper connecting portion 1 to facilitate the assembly between the spring 200 and the brake ring 100.

[0029] Furthermore, the upper connecting portion 1, the intermediate supporting portion 2, and the lower connecting portion 3 are integrally formed, which is convenient for processing and avoids the problem of considering assembly errors at the connection in the case of split setting.

[0030] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the technical solutions of the present invention, or the concept and technical solutions of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A shock absorber piston rod riveted brake ring spring buffer structure, the buffer structure comprises 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 supporting part connecting the upper connecting part and the lower connecting part; a spring is sleeved outside the upper connecting part and supported on the intermediate supporting part; a circle of grooves is circumferentially arranged at a position on the piston rod that cooperates 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 supporting part is pressed into the groove by external force to realize 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 surface of the intermediate support portion is a conical surface to improve the load-bearing capacity.

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

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

5. A shock absorber piston rod riveted brake ring spring buffer structure according to any one of claims 1 to 5, characterized in that: An interference fit is adopted between the upper connecting portion and the spring.

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

7. A shock absorber piston rod riveted brake ring spring buffer structure according to any one of claims 1 to 5, characterized in that: An elastic washer is arranged at the end of the spring away from the brake ring, and the spring is T-shaped as a whole.

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