Brake return spring

Abstract

The utility model relates to the technical field of brakes, discloses a brake return spring, and solves the problems that in long-term reciprocating motion, tiny relative sliding possibly exists between a spring body and the inner wall of a cylinder and between the spring body and the inner wall of a sleeve, abrasion is caused, and the performance of the spring is affected. A brake return spring comprises a sleeve, a spring body, a connecting piece, a hook ring, a connecting column, a protective sleeve, a high-temperature-resistant layer and a wear-resistant layer, the protective sleeve on the outer surface of the spring body not only provides physical isolation, but also reduces corrosion of environmental factors to the spring body through the combined action of the high-temperature-resistant layer and the wear-resistant layer, and the service life of the spring body is prolonged. The high-temperature-resistant layer on the outer surface of the protective sleeve is convenient for protecting the spring body from high-temperature damage, particularly, the service life of the spring body is effectively prolonged under the condition of temperature rise caused by frequent braking, and the wear-resistant layer reduces friction between the protective sleeve and the inner wall of the sleeve or other possible contact components in the springback process of the spring body, so that the service life of the spring body is prolonged. And the abrasion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of brakes, and specifically relates to a brake return spring. Background Technique

[0002] The brake return spring is an important component in the vehicle braking system, mainly used to ensure that the braking components can quickly and smoothly return to the initial position when not braking after the braking operation is completed.

[0003] The existing Chinese patent with the application number CN202222338905.2 discloses a brake return spring, including a spring body. Connecting pieces are connected to both the left and right sides of the spring body, and hook rings are connected to the sides of the connecting pieces far away from the spring body. Damping grooves are provided on the inner walls of the two hook rings. The hook ring is in the shape of five-eighths of a ring, and the damping grooves are evenly distributed on the inner wall of the hook ring. By setting the damping grooves, the utility model can increase the friction between the hook ring and the hook after installation, and avoid the hook ring falling off when sudden braking occurs.

[0004] In the above technology, the spring body is prone to deformation during long-term use. Although the outer diameter of the column is slightly smaller than the inner ring of the spring body, there is still a small relative sliding during long-term reciprocating motion. This sliding will wear the spring under the action of repeated stress, thus affecting the performance of the spring. Content of the Utility Model

[0005] The purpose of the utility model is to provide a brake return spring. By using this device for work, the problem that there may be a small relative sliding between the spring body, the column and the inner wall of the sleeve during long-term reciprocating motion, which will cause wear and thus affect the spring performance, is solved.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A brake return spring, including a sleeve, a spring body arranged inside the sleeve, connecting pieces arranged at both ends of the spring body, and hook rings arranged at one ends of the two groups of connecting pieces. The connecting piece penetrates the sleeve, a connecting column is fixedly connected to the inner wall of the sleeve, a protective sleeve is arranged on the outer surface of the spring body, and a high-temperature resistant layer and a wear-resistant layer are sequentially arranged on the outer surface of the protective sleeve.

[0007] Further, a chute is provided on the outer surface of the connecting column, a slider is fixedly connected to the outer surface of the protective sleeve, and the slider is slidably connected to the chute.

[0008] Further, damping grooves are provided on the outer surfaces of the two groups of hook rings. There are multiple groups of the damping grooves, and friction sheets are arranged inside the multiple groups of damping grooves.

[0009] Further, the spring body is a component made of a titanium alloy wire material, and the protective sleeve is a component made of a polyurethane material.

[0010] Furthermore, the high-temperature resistant layer is a component made of a polytetrafluoroethylene material, and the wear-resistant layer is a component made of an epoxy resin material.

[0011] Furthermore, the friction plate is a component made of a carbon fiber composite material.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] A brake return spring proposed by the present utility model. The protective sleeve on the outer surface of the spring body not only provides physical isolation, but also reduces the erosion of the spring body by environmental factors through the combined action of the high-temperature resistant layer and the wear-resistant layer to maintain the stable performance of the spring body. The high-temperature resistant layer on the outer surface of the protective sleeve is convenient for protecting the spring body from high-temperature damage, especially in the case of frequent braking resulting in temperature rise, which is convenient for effectively extending the service life of the spring body. The wear-resistant layer reduces the friction between the protective sleeve and the inner wall of the sleeve or other possible contact components during the spring-back process of the spring body, reduces wear, and solves the problem that in the long-term reciprocating motion, there may be a small relative sliding between the spring body and the column and the inner wall of the sleeve, which will cause wear and thus affect the spring performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model Figure 1 ;

[0015] Figure 2 is a schematic diagram of the overall structure of the present utility model Figure 2 ;

[0016] Figure 3 is a schematic diagram of the protective sleeve, spring body and connection structure of the present utility model;

[0017] Figure 4 is a schematic diagram of the protective sleeve, high-temperature resistant layer and wear-resistant layer structure of the present utility model.

[0018] In the figure: 1, sleeve; 2, spring body; 21, connecting piece; 3, connecting column; 31, chute; 4, hook ring; 41, damping groove; 5, protective sleeve; 51, slider; 52, high-temperature resistant layer; 53, wear-resistant layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] To further understand the content of the present utility model, the present utility model will be described in detail in conjunction with the accompanying drawings.

[0021] Combined with Figures 1-4 , a brake return spring includes a sleeve 1, a spring body 2 disposed inside the sleeve 1, connecting members 21 disposed at both ends of the spring body 2, and hook rings 4 disposed at one ends of two groups of connecting members 21. The connecting members 21 penetrate the sleeve 1. A connecting column 3 is fixedly connected to the inner wall of the sleeve 1. A protective sleeve 5 is disposed on the outer surface of the spring body 2. A high-temperature resistant layer 52 and a wear-resistant layer 53 are sequentially disposed on the outer surface of the protective sleeve 5.

[0022] The following further describes the present utility model in conjunction with embodiments.

[0023] Embodiment 1:

[0024] Please refer to Figures 2-4 , a sliding groove 31 is provided on the outer surface of the connecting column 3, and a sliding block 51 is fixedly connected to the outer surface of the protective sleeve 5. The sliding block 51 is slidably connected to the sliding groove 31. The cooperation between the sliding block 51 and the sliding groove 31 facilitates guiding the protective sleeve 5 to move along a predetermined path when the spring body 2 is compressed or extended, ensuring smooth movement of the spring body 2, preventing the protective sleeve 5 from being twisted or deviated, and enhancing stability and reliability.

[0025] Damping grooves 41 are provided on the outer surfaces of both groups of hook rings 4. There are multiple groups of damping grooves 41. Friction sheets are provided inside all the multiple groups of damping grooves 41. The friction sheets inside the damping grooves 41 are convenient for generating additional frictional force when the hook rings 4 are subjected to dynamic stress, preventing the hook rings 4 from falling off.

[0026] The spring body 2 is a component made of a titanium alloy wire material, and the protective sleeve 5 is a component made of a polyurethane material. Polyurethane is a highly flexible and wear-resistant material. As the protective sleeve 5, it is convenient for effectively resisting external physical damage and chemical corrosion, protecting the spring body 2 from damage, and its elastic characteristics can also absorb a part of vibration, further improving smoothness.

[0027] The high-temperature resistant layer 52 is a component made of a polytetrafluoroethylene material, and the wear-resistant layer 53 is a component made of an epoxy resin material. The polytetrafluoroethylene material has extremely high chemical inertness and excellent heat-resistant performance, and can maintain good stability and low friction characteristics in a high-temperature environment, which is convenient for protecting the protective sleeve 5 from high-temperature damage. As the wear-resistant layer 53, the epoxy resin has good hardness and mechanical strength, can withstand large frictional forces and impacts, and protects the spring body 2 from damage.

[0028] The friction plate is a component made of a carbon fiber composite material. The carbon fiber composite material has good wear resistance and low wear on the friction pair material, which is not only convenient for extending the service life of the friction plate itself, but also can protect the surface in contact with it.

[0029] During use, the protective sleeve 5 on the outer surface of the spring body 2 not only provides physical isolation, but also reduces the erosion of environmental factors on the spring body 2 through the combined action of the high-temperature resistant layer 52 and the wear-resistant layer 53 to maintain the stable performance of the spring body 2. The high-temperature resistant layer 52 on the outer surface of the protective sleeve 5 is convenient for protecting the spring body 2 from high-temperature damage, especially in the case of frequent braking resulting in temperature rise, which is convenient for effectively extending the service life of the spring body 2. The wear-resistant layer 53 reduces the friction between the protective sleeve 5 and the inner wall of the sleeve 1 or other possible contact components during the rebound process of the spring body 2, reduces wear, and through the cooperation of the slider 51 and the chute 31, it is convenient to guide the protective sleeve 5 to move along a predetermined path when the spring body 2 compresses or extends, ensuring smooth movement of the spring body 2, preventing the protective sleeve 5 from twisting or deviating, and enhancing stability and reliability. The friction plate inside the damping groove 41 is convenient for generating additional frictional force when the hook ring 4 is subjected to dynamic stress, preventing the hook ring 4 from falling off.

[0030] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brake return spring, comprising a sleeve (1), a spring body (2) disposed inside the sleeve (1), connecting members (21) disposed at both ends of the spring body (2), and hook rings (4) disposed at one end of two groups of the connecting members (21), the connecting members (21) passing through the sleeve (1), characterized in that: A connecting column (3) is fixedly connected to the inner wall of the sleeve (1). A protective sleeve (5) is arranged on the outer surface of the spring body (2), and a high-temperature resistant layer (52) and a wear-resistant layer (53) are sequentially arranged on the outer surface of the protective sleeve (5).

2. A brake return spring according to claim 1, characterized in that: A chute (31) is formed on the outer surface of the connecting column (3), a slider (51) is fixedly connected to the outer surface of the protective sleeve (5), and the slider (51) is slidably connected to the chute (31).

3. A brake return spring according to claim 1, characterized in that: Damping grooves (41) are formed on the outer surfaces of the two sets of hook rings (4), there are multiple groups of the damping grooves (41), and friction plates are arranged inside the multiple groups of damping grooves (41).

4. The return spring of a brake according to claim 3, characterized in that: The spring body (2) is a component made of a titanium alloy wire material, and the protective sleeve (5) is a component made of a polyurethane material.

5. A brake return spring according to claim 4, wherein: The high-temperature resistant layer (52) is a component made of a polytetrafluoroethylene material, and the wear-resistant layer (53) is a component made of an epoxy resin material.

6. A brake return spring according to claim 3, characterized in that: The friction plate is a component made of a carbon fiber composite material.

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