Air spring shock absorber with air spring piston protection structure

Abstract

The utility model discloses an air spring shock absorber with an air spring piston protection structure. The air spring shock absorber comprises a shock absorber body and an air spring matched with the shock absorber body. The air spring comprises an air bag and an air spring piston arranged at the bottom end of the air bag; an air spring piston positioning disc is fixedly arranged on the shock absorber body in a sleeving mode, the air spring piston is fixedly connected with a cylinder barrel of the shock absorber body through the air spring piston positioning disc, an annular flange is arranged at the bottom end of the air spring piston positioning disc, a set of positioning clamping grooves are formed in the annular flange in the circumferential direction, and correspondingly, the air spring piston is fixedly connected with the air spring piston through the air spring piston positioning disc. A group of positioning raised heads are arranged at the bottom end of the air spring piston, and the positioning raised heads are matched with the positioning clamping grooves to circumferentially limit the air spring piston; a shock absorber connecting rod dust cover is arranged at the sealed end of the shock absorber body, a boss is arranged on the periphery of the lower end of the shock absorber connecting rod dust cover, and the boss is matched with the air spring piston to radially limit the air spring piston.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, and particularly to an air spring shock absorber with an air spring piston protection structure. Background Art

[0002] The Chinese automotive shock absorber market has developed rapidly in the past few years, with the market scale constantly expanding. With the continuous growth of the Chinese automotive industry and the increasing requirements of consumers for automotive comfort, the market demand for shock absorbers will continue to rise. Due to the rapid development of the automotive industry and the continuous improvement of consumers' requirements for automotive comfort, traditional metal spring shock absorbers have been difficult to meet the demand. Air springs, with their unique shock absorption effect and adjustability, have gradually become the first choice for high-end automotive shock absorption systems.

[0003] An automotive air spring shock absorber, also known as an air suspension system, its core lies in utilizing the increasing rigidity of the enclosed gas in the air spring after being compressed, that is, as the air spring is continuously compressed, its stiffness gradually increases. This characteristic enables the air suspension system to have nearly ideal dynamic elastic characteristics, which can effectively absorb and mitigate road surface impacts, and improve the ride comfort and handling stability of the vehicle. The air spring shock absorber is composed of two major parts: an air spring and a shock absorber body. Among them, the air spring includes an airbag and an air spring piston, and the air spring piston is fixed on the cylinder barrel of the shock absorber body to realize the connection between the airbag and the shock absorber body. However, the existing air spring shock absorbers still have the following deficiencies:

[0004] (1) During the movement of the existing air spring shock absorber, the air spring piston is prone to rotation, resulting in abnormal noises from the shock absorber.

[0005] (2) In the existing air spring shock absorber, the gap between the shock absorber connecting rod dust cover and the air spring piston is too large, and when encountering an uneven road surface, there will be a large impact force, which cannot play a good guiding role for the air spring piston, resulting in excessive lateral force on the air spring piston, causing damage and reducing the service life of the shock absorber. Summary of the Invention

[0006] In order to overcome the above problems existing in the prior art, the utility model provides an air spring shock absorber with an air spring piston protection structure. By setting specific circumferential limiting structures and radial limiting structures, a protection structure for the air spring piston is formed, effectively avoiding abnormal noises caused by rotation and damage caused by radial shaking.

[0007] The technical solution of the utility model is as follows:

[0008] An air spring shock absorber with an air spring piston protection structure comprises a shock absorber body and a matching air spring; the air spring comprises an air bag and an air spring piston arranged at the bottom end of the air bag; an air spring piston positioning plate is fixedly sleeved on the shock absorber body, and the air spring piston is fixedly connected to the cylinder of the shock absorber body through the air spring piston positioning plate; an annular flange is provided at the bottom end of the air spring piston positioning plate, and a group of positioning grooves are circumferentially provided on the annular flange, and correspondingly, a group of positioning protrusions are provided at the bottom end of the air spring piston, and the positioning protrusions cooperate with the positioning grooves to form a circumferential limit for the air spring piston; a shock absorber connecting rod dust cover is provided at the sealed end of the shock absorber body, and a boss is provided on the outer periphery of the lower end of the shock absorber connecting rod dust cover, and the boss cooperates with the air spring piston to form a radial limit for the air spring piston.

[0009] Compared with the prior art, the utility model forms a protective structure for the air spring piston by setting a specific circumferential limit structure and a radial limit structure, which effectively avoids abnormal noise caused by rotation and damage caused by radial shaking, as follows:

[0010] 1) The utility model limits the rotation of the air spring piston by the cooperation between the positioning groove and the positioning convex head on the piston positioning plate, thereby avoiding the occurrence of abnormal noise due to its rotation. The structure is simple, easy to implement and convenient to assemble.

[0011] 2) The utility model arranges a plurality of bosses on the outer periphery of the lower end of the shock absorber connecting rod dust cover, which are matched with the clearance of the upper end of the air spring piston. The lateral force generated by the air spring piston during the movement of the shock absorber is weakened through the contact between the bosses and the laterally deviated air spring piston, thereby avoiding damage caused by the left and right shaking of the air spring piston, thereby increasing the service life of the shock absorber.

[0012] Furthermore, in the air spring shock absorber with the air spring piston protection structure, the annular flange is provided with 2-6 positioning slots, and the positioning slots are in the shape of an open rectangle. During the installation process, the positioning protrusions on the air spring piston with matching shapes are installed into the positioning slots. Through the design of this structure, the rotation of the air spring piston during the operation of the shock absorber can be limited, and the phenomenon of abnormal noise caused by the rotation of the air spring piston can be avoided. At the same time, it has the advantage of easy processing.

[0013] Furthermore, in the above air spring shock absorber with an air spring piston protection structure, an O-ring seal and a nylon ring are provided between the air spring piston positioning disc and the air spring piston, and the O-ring seal is located above the nylon ring. Since the air pressure in the air spring is relatively high during use, the setting of the seal ring and the nylon ring can better improve the pressure bearing value, enabling a sealed connection between the air spring piston positioning disc and the air spring piston; through the excellent sealing effect of the O-ring seal and the nylon ring, it can ensure the gas tightness during the movement of the air spring shock absorber, avoiding the phenomenon of reduced shock absorption effect caused by gas leakage.

[0014] Furthermore, in the above air spring shock absorber with an air spring piston protection structure, 4 - 8 bosses can be provided on the outer periphery of the lower end of the shock absorber connecting rod dust cover. Further, the bosses can be triangular in shape. Through the cooperation between the bosses and the upper end of the air spring piston, when the vehicle jolts, the contact between the bosses and the air spring piston can be utilized to weaken the lateral force generated by the air spring piston, better protecting the shock absorber parts. At the same time, the boss design on the shock absorber connecting rod dust cover of the present utility model is simple, easy to manufacture, and convenient to implement.

[0015] Furthermore, in the above air spring shock absorber with an air spring piston protection structure, the bosses are in clearance fit with the air spring piston. The clearance fit between the bosses and the air spring piston has the advantages of easy assembly and is also beneficial for further reducing wear.

[0016] Furthermore, in the above air spring shock absorber with an air spring piston protection structure, a pressing groove is provided inside the shock absorber connecting rod dust cover, and a pressing block is provided at the upper end of the shock absorber body. The pressing groove and the pressing block cooperate with each other to fix the shock absorber connecting rod dust cover to the upper end of the shock absorber body. Further, the number of the pressing grooves can be 4 - 8. Further, the pressing grooves and the bosses are arranged alternately in the circumferential direction of the shock absorber connecting rod dust cover. The cooperation between the pressing block and the pressing groove is beneficial for pressing the piston dust cover into the upper end of the shock absorber body for fixation, which can effectively prevent external environmental factors such as dust and impurities from entering the shock absorber body, protecting the internal working components of the shock absorber body from damage and extending its service life. Description of the Drawings

[0017] Figure 1 is a schematic structural view of the air spring shock absorber with an air spring piston protection structure of the present utility model;

[0018] Figure 2 is a schematic structural view of the shock absorber connecting rod dust cover in the air spring shock absorber with an air spring piston protection structure of the present utility model;

[0019] Figure 3It is a schematic A - sectional view of the dust cover of the shock absorber connecting rod in the air spring shock absorber with an air spring piston protection structure of the present utility model;

[0020] Figure 4 It is a side view of the air spring piston positioning disc in the air spring shock absorber with an air spring piston protection structure of the present utility model;

[0021] Figure 5 It is a top view of the air spring piston positioning disc in the air spring shock absorber with an air spring piston protection structure of the present utility model.

[0022] The reference signs in the drawings are: 1 - shock absorber body; 1.1 - pressing block; 2 - airbag; 3 - air spring piston; 3.1 - positioning projection; 4 - air spring piston positioning disc; 4.1 - annular flange; 4.2 - positioning slot; 5 - dust cover of shock absorber connecting rod; 5.1 - boss; 5.2 - pressing groove; 6 - O - ring seal; 7 - nylon ring. Detailed implementation manners

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments, but it is not used as the basis for the present utility model. The content not described in detail or the structure not shown in the drawings are all common technical knowledge in the art.

[0024] Embodiment (see Figures 1-5 )

[0025] An air spring shock absorber with an air spring piston protection structure includes a shock absorber body 1 and a supporting air spring; the air spring includes an airbag 2 and an air spring piston 3 provided at the bottom end of the airbag 2; an air spring piston positioning disc 4 is fixedly sleeved on the shock absorber body 1, and the air spring piston 3 is fixedly connected to the cylinder barrel of the shock absorber body 1 through the air spring piston positioning disc 4; an annular flange 4.1 is provided at the bottom end of the air spring piston positioning disc 4, and a set of positioning slots 4.2 are provided along the circumferential direction on the annular flange 4.1. Correspondingly, a set of positioning projections 3.1 are provided at the bottom end of the air spring piston 3, and the positioning projections 3.1 cooperate with the positioning slots 4.2 to form circumferential limitation on the air spring piston 3; a dust cover 5 of the shock absorber connecting rod is provided at the sealing end of the shock absorber body 1, and a boss 5.1 is provided on the outer periphery of the lower end of the dust cover 5 of the shock absorber connecting rod, and the boss 5.1 cooperates with the air spring piston 3 to form radial limitation on the air spring piston 3.

[0026] There are 2 - 6 positioning slots 4.2 provided on the annular flanging 4.1, and the shape of the positioning slot 4.2 is an unclosed rectangle. During the installation process, the positioning convex head 3.1 on the air spring piston 3 with a matching shape is inserted into the positioning slot 4.2. Through the design of this structure, the rotation of the air spring piston 3 during the operation of the shock absorber can be restricted, avoiding the phenomenon of abnormal noise caused by the rotation of the air spring piston 3. At the same time, it has the advantage of being easy to process.

[0027] An O - ring seal 6 and a nylon ring 7 are provided between the air spring piston positioning disc 4 and the air spring piston 3, and the O - ring seal 6 is located above the nylon ring 7. Since the air pressure is relatively high when the air spring is in use, setting the O - ring seal 6 and the nylon ring 7 can better improve the pressure - bearing value, enabling a sealed connection between the air spring piston positioning disc 4 and the air spring piston 3; through the excellent sealing effect of the O - ring seal 6 and the nylon ring 7, the airtightness of the gas can be ensured during the movement of the air spring shock absorber, avoiding the phenomenon that the damping effect is reduced due to gas leakage.

[0028] The number of bosses 5.1 provided on the outer periphery of the lower end of the shock absorber connecting rod dust cover 5 is 6, and the bosses 5.1 are triangular. Through the cooperation between the bosses 5.1 and the upper end of the air spring piston 3, when the vehicle jolts, the lateral force generated by the air spring piston 3 can be weakened by the contact between the bosses 5.1 and the air spring piston 3, better protecting the shock absorber parts. At the same time, the design of the bosses 5.1 on the shock absorber connecting rod dust cover 5 of the present utility model is simple, easy to manufacture, and convenient to implement.

[0029] The boss 5.1 is in clearance fit with the air spring piston 3. The clearance fit between the boss 5.1 and the air spring piston 3 has the advantage of being easy to assemble and is also beneficial to further reducing wear.

[0030] A pressing block 1.1 is provided at the upper end of the shock absorber body 1. The pressing groove 5.2 cooperates with the pressing block 1.1 to fix the shock absorber connecting rod dust cover 5 to the upper end of the shock absorber body 1, and the number of the pressing grooves 5.2 is 6. The pressing grooves 5.2 and the bosses 5.1 are arranged alternately in the circumferential direction of the shock absorber connecting rod dust cover. The cooperation between the pressing block 1.1 and the pressing groove 5.2 is beneficial to press the piston dust cover 5 into the upper end of the shock absorber body 1 for fixation, effectively preventing external environmental factors such as dust and impurities from entering the shock absorber body 1, protecting the internal working components of the shock absorber body 1 from damage, and extending its service life.

[0031] The above general description of the utility model involved in this application and the description of its specific implementation should not be construed as a limitation on the technical solution of the utility model. Those skilled in the art can, based on the disclosure of this application, without departing from the constituent elements of the utility model involved, add, subtract, or combine the disclosed technical features in the above general description or / and specific implementation (including embodiments) to form other technical solutions that fall within the protection scope of this application.

Claims

1. An air spring shock absorber with an air spring piston protection structure, comprising a shock absorber body (1) and a matching air spring; the air spring comprising an air bag (2) and an air spring piston (3) arranged at the bottom end of the air bag (2); an air spring piston positioning plate (4) is fixedly sleeved on the shock absorber body (1), and the air spring piston (3) is fixedly connected to the cylinder of the shock absorber body (1) via the air spring piston positioning plate (4); the characteristics are: The bottom end of the air spring piston positioning plate (4) is provided with an annular flange (4.1), and a group of positioning grooves (4.2) are circumferentially provided on the annular flange (4.1). Correspondingly, the bottom end of the air spring piston (3) is provided with a group of positioning protrusions (3.1), and the positioning protrusions (3.1) cooperate with the positioning grooves (4.2) to form a circumferential limit for the air spring piston (3); the sealing end of the shock absorber body (1) is provided with a shock absorber connecting rod dust cover (5), and the outer periphery of the lower end of the shock absorber connecting rod dust cover (5) is provided with a boss (5.1), and the boss (5.1) cooperates with the air spring piston (3) to form a radial limit for the air spring piston (3).

2. The air spring shock absorber with an air spring piston protection structure according to claim 1, characterized in that: The annular flange (4.1) is provided with 2 to 6 positioning slots (4.2), and the positioning slots (4.2) are in the shape of an open rectangle.

3. The air spring shock absorber with an air spring piston protection structure according to claim 1, characterized in that: An O-type sealing ring (6) and a nylon ring (7) are provided between the air spring piston positioning plate (4) and the air spring piston (3), and the O-type sealing ring (6) is located on the upper side of the nylon ring (7).

4. The air spring shock absorber with an air spring piston protection structure according to claim 1, characterized in that: The outer periphery of the lower end of the shock absorber connecting rod dust cover (5) is provided with 4 to 8 bosses (5.1).

5. The air spring shock absorber with an air spring piston protection structure according to claim 4, characterized in that: The boss (5.1) is triangular in shape.

6. The air spring shock absorber with an air spring piston protection structure according to claim 1, characterized in that: The boss (5.1) is clearance-matched with the air spring piston (3).

7. The air spring shock absorber with an air spring piston protection structure according to claim 1, characterized in that: A clamping groove (5.2) is provided inside the shock absorber connecting rod dust cover (5), and a clamping block (1.1) is provided at the upper end of the shock absorber body (1). The clamping groove (5.2) and the clamping block (1.1) cooperate with each other to fix the shock absorber connecting rod dust cover (5) to the upper end of the shock absorber body (1).

8. The air spring shock absorber with an air spring piston protection structure according to claim 7, characterized in that: The number of the pressing grooves (5.2) is 4-8.

9. The air spring shock absorber with an air spring piston protection structure according to claim 8, characterized in that: The clamping grooves (5.2) and the bosses (5.1) are arranged alternately in the circumferential direction of the shock absorber connecting rod dust cover.

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