Air bag shock absorber with built-in spring

Abstract

The utility model discloses an air bag shock absorber with a built-in spring, which belongs to the technical field of shock absorbers and comprises a connecting rod, an air bag assembly and a shock absorber cylinder. The upper end of the connecting rod and the lower end of the shock absorber barrel are sleeved with the upper end and the lower end of the air bag assembly respectively, a gasket is arranged at the connecting position of the upper end of the shock absorber barrel and the connecting rod, and a limiting spring is arranged between the gasket and an upper shell of the air bag assembly. Stretching and compression of the air bag shock absorber are limited through stretching and compression of the limiting spring, compared with a traditional combined structure of inner and outer limiting blocks, the structure of the limiting spring is slightly influenced by the environment temperature difference, and the rigidity fluctuation rate in a conventional operation temperature range is small; the problems that the rubber material is easy to harden and crack when the temperature difference is large and is easy to creep and lose efficacy under high-frequency vibration are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of shock absorber, concretely relates to an air bag shock absorber with built-in spring. BACKGROUND

[0002] The air bag shock absorber is a kind of shock absorber using compressed air to buffer energy absorption, and is commonly used in the suspension system of vehicle;Air bag shock absorber needs to set limit block in the inside of air bag, limit block is generally set in the inside or outside of air bag, and plays the role of avoiding excessive compression or stretching of air bag, such as Figure 2 It is a structure of an existing air bag shock absorber, and inner limit block and outer limit block are arranged at the inner and outer ends of shock absorber cylinder respectively, the limit block of the existing air bag shock absorber is of rubber material, but in the use process, the limit block needs to be frequently compressed and stretched, and is prone to fatigue, and simultaneously based on the different operation environments of shock absorber, the limit block also needs to frequently operate in the environment with large temperature difference, and also needs to guarantee the force value requirement of operation, so that the limit block of conventional air bag shock absorber is prone to damage, and then the use characteristics of shock absorber are affected.

[0003] Therefore, we design an air bag shock absorber with built-in spring to provide another technical solution for the above technical problems. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing an air bag shock absorber with built-in spring to solve the problems of the existing air bag shock absorber in the use process in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: an air bag shock absorber with built-in spring, including connecting rod, air bag assembly and shock absorber cylinder, the lower end of connecting rod extends into the internal cavity of shock absorber cylinder, the upper and lower ends of air bag assembly are respectively sleeved on the upper end of connecting rod and the lower end of shock absorber cylinder, the connecting position of the upper end of shock absorber cylinder and connecting rod is provided with gasket, and the gasket is provided with limit spring between air bag assembly upper housing.

[0006] Preferably, the limit seat is sleeved on the outer side of connecting rod.

[0007] Preferably, the upper part of connecting rod is welded with upper lifting lug through connecting column, the lower part of shock absorber cylinder is welded with lower lifting lug, and the inside of upper lifting lug and lower lifting lug is provided with rubber bushing.

[0008] Preferably, the gasket is provided with upward protruding part, and the lower part of air bag assembly upper housing is provided with downward protruding part.

[0009] Preferably, the force value of limit spring is set based on compression stroke limit value and stretching stroke limit value of shock absorber.

[0010] Preferably, the air bag assembly of the air bag and the shock absorber cylinder is provided with a spring disc at the connecting position.

[0011] Compared with the prior art, the air bag shock absorber has the advantages that:

[0012] The stretching and compression of the limiting spring is used to limit the stretching and compression of the air bag shock absorber, compared with the combination structure of the traditional inner and outer limiting blocks, the structure of the limiting spring is less affected by the environmental temperature difference, and the rigidity fluctuation rate is smaller in the conventional operation temperature range, thereby effectively solving the problems that the rubber material is prone to hardening and cracking under a large temperature difference and is prone to creep failure under high-frequency vibration. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic view of the main structure of the utility model;

[0014] Figure 2 It is a structural schematic view of the air bag shock absorber with limiting blocks in the prior embodiment.

[0015] In the figure: 1, upper hanger; 2, connecting column; 3, air bag assembly; 4, connecting rod; 5, limiting spring; 6, washer; 7, shock absorber cylinder; 8, limiting seat; 9, spring disc; 10, lower hanger; 11, rubber bushing; 12, upper limiting block; 13, lower limiting block. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0017] Referring to Figures 1-2 An air bag shock absorber with a built-in spring, comprising a connecting rod 4, an air bag assembly 3 and a shock absorber cylinder, the lower end of the connecting rod 4 extends into the inner cavity of the shock absorber cylinder, the upper and lower ends of the air bag assembly 3 are respectively sleeved on the upper end of the connecting rod 4 and the lower end of the shock absorber cylinder, a gasket is arranged at the connecting position of the upper end of the shock absorber cylinder and the connecting rod 4, and a limiting spring 5 is arranged between the gasket and the upper shell of the air bag assembly 3.

[0018] The scheme provides a gas bag shock absorber with built-in spring. The limiting block in the shock absorber is replaced by a limiting spring 5 to solve the fatigue problem of the rubber limiting block in the existing gas bag shock absorber under the operating environment of high temperature difference and high frequency. Specifically, the limiting spring 5 is arranged between the shock absorber cylinder and the gas bag assembly 3, and the stretching and compression of the limiting spring 5 are used to limit the stretching and compression of the gas bag shock absorber. Compared with the traditional combined structure of the inner and outer limiting blocks, the structure of the limiting spring 5 is less affected by the environmental temperature difference, and the stiffness fluctuation rate is small in the conventional operating temperature range (-50-100 degrees Celsius), and the performance can still be maintained after the million times fatigue test, effectively solving the pain points of hardening and cracking of rubber materials when the temperature difference exceeds 80℃ and creep failure under high frequency vibration. The limiting spring 5 with a suitable force value is selected according to the requirements of the gas bag shock absorber, which effectively protects the stability and safety of the gas bag shock absorber during use. The limiting spring 5 can also select different materials according to the operating environment, for example, the 60Si2MnA material spring can adapt to the corrosion environment, thereby improving the performance of the gas bag shock absorber in the high corrosion environment.

[0019] Further, a limiting seat 8 is arranged in the shock absorber cylinder, and the limiting seat 8 is sleeved on the outer side of the connecting rod 4.

[0020] Through the technical scheme, the limiting seat 8 and the connecting rod 4 are gap-fitted, and when the connecting rod 4 moves up and down, the limiting seat 8 can limit the stroke of the connecting rod 4, thereby ensuring the stability of the up-and-down movement of the connecting rod 4.

[0021] Further, the upper part of the connecting rod 4 is welded with an upper lifting lug through the connecting column 2, and the lower part of the shock absorber cylinder is welded with a lower lifting lug 10. The inner parts of the upper lifting lug and the lower lifting lug 10 are provided with rubber bushings 11.

[0022] Further, the gasket is provided with an upward protruding part, and the lower part of the upper shell of the gas bag assembly 3 is provided with a downward protruding part.

[0023] The outer diameters of the protruding parts of the gasket and the upper shell are matched with the inner diameter of the limiting spring 5. The protruding parts limit the position of the limiting spring 5, thereby limiting the forward and backward movement of the limiting spring 5, so that the stretching and compression direction of the limiting spring 5 is accurately controlled on the axis of the connecting rod 4.

[0024] Further, the force value of the limiting spring 5 is set based on the compression stroke limit value and the stretching stroke limit value of the shock absorber.

[0025] The force value of the limiting spring 5 is closely related to the compression and stretching stroke limit value of the shock absorber, and the core target is to limit the movement range of the shock absorber through the mechanical properties of the spring, while avoiding overload or damage, in the scheme, the air bag shock absorber is compressed, and the limiting spring 5 is also compressed to provide a reverse spring force, thereby avoiding the air bag shock absorber from being compressed too much and damaged, similarly, when the air bag shock absorber is stretched, the limiting spring 5 is also stretched to provide a reverse spring force, thereby avoiding the air bag shock absorber from being stretched too much and damaged.

[0026] Further, the air bag of the air bag assembly 3 is provided with a spring disc 9 at the connecting position of the air bag and the shock absorber cylinder.

[0027] Through the technical scheme, the air bag of the air bag assembly 3 is provided with a spring disc 9 at the connecting position of the air bag and the shock absorber cylinder, the elastic force of the air bag is efficiently coupled with the damping force of the shock absorber, energy is stably transmitted in the compression / stretching stroke, the spring disc 9 also plays a role of positioning and restraining, and the relative displacement of the air bag and the shock absorber is limited through bolt or welding fixation, the coaxiality of the air bag and the shock absorber is ensured, and eccentric wear is avoided.

[0028] Working principle: the limiting spring 5 is used to replace the limiting block in the shock absorber, so as to solve the fatigue problem of the rubber limiting block in the existing air bag shock absorber under the working environment of high temperature difference and high frequency, specifically, the limiting spring 5 is arranged between the shock absorber cylinder and the air bag assembly 3, and the stretching and compression of the limiting spring 5 are used to limit the stretching and compression of the air bag shock absorber, compared with the combined structure of the traditional inner and outer limiting blocks, the structure of the limiting spring 5 is less affected by the environmental temperature difference, and the rigidity fluctuation rate is small in the conventional operation temperature range (within 50-100 degrees Celsius), thereby effectively solving the problems that the rubber material is prone to hardening and cracking when the temperature difference exceeds 80 DEG C, and is prone to creep failure under high-frequency vibration.

[0029] In the description of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0030] In the description of the application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the application and the features of different embodiments or examples can be combined by those skilled in the art without contradiction, if possible.

[0031] Although the embodiments of the application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments change, modify, replace and vary in many ways can be understood by those skilled in the art without departing from the principles and spirits of the application, the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A gas-charged damper with an in-built spring, characterised in that: The shock absorber comprises a connecting rod, an air bag assembly and a shock absorber cylinder, the lower end of the connecting rod extends into the inner cavity of the shock absorber cylinder, the upper and lower ends of the air bag assembly are sleeved on the upper end of the connecting rod and the lower end of the shock absorber cylinder respectively, a gasket is arranged at the connecting position of the upper end of the shock absorber cylinder and the connecting rod, and a limiting spring is arranged between the gasket and the upper shell of the air bag assembly.

2. A gas-charged damper with a built-in spring according to claim 1, characterized in that: A limiting seat is arranged in the shock absorber cylinder, and the limiting seat is sleeved on the outer side of the connecting rod.

3. A gas-charged damper with an internal spring according to claim 1, characterized in that: An upper lifting lug is welded on the upper part of the connecting rod through a connecting column, a lower lifting lug is welded on the lower part of the shock absorber cylinder, and rubber bushings are arranged in the interiors of the upper lifting lug and the lower lifting lug.

4. The gas-charged damper with a built-in spring according to claim 1, characterized in that: An upward protruding part is arranged on the gasket, and a downward protruding part is arranged on the lower part of the upper shell of the air bag assembly.

5. The gas-charged damper with an internal spring according to claim 1, characterized in that: The force value of the limiting spring is set based on the compression stroke limit value and the stretching stroke limit value of the shock absorber.

6. The gas-charged strut with an internal spring of claim 1, wherein: A spring disc is arranged at the connecting position of the air bag of the air bag assembly and the shock absorber cylinder.

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