CN112431885A

CN112431885A - Double-air-chamber air spring

Info

Publication number: CN112431885A
Application number: CN202011279832.3A
Authority: CN
Inventors: 李莉华; 毛祖顺; 徐家权
Original assignee: Guangzhou Wanmei Vehicle Industry Co ltd
Current assignee: Guangzhou Wanmei Vehicle Industry Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-03-02
Anticipated expiration: 2040-11-16
Also published as: CN112431885B

Abstract

The invention discloses a double-air-chamber air spring which comprises an inner tube body, an air rod fixing seat, an inner tube fixing seat, a piston assembly and a telescopic rod, wherein the air rod fixing seat and the inner tube fixing seat are respectively arranged at two ends of the inner tube body, the piston assembly is slidably arranged in the inner tube body, the air rod fixing seat is matched with the piston assembly and encloses a first air chamber, the inner tube fixing seat is matched with the piston assembly and encloses a second air chamber, one end of the telescopic rod penetrates through the inner tube fixing seat and is fixedly connected with the piston assembly, and the double-air-chamber air spring replaces the conventional air spring in a spring resetting mode, so that the noise generated in the using process is effectively reduced, and the weight of the air spring is reduced.

Description

Double-air-chamber air spring

Technical Field

The invention relates to the technical field of bicycles, in particular to a double-air-chamber air spring.

Background

The air spring is a device which is filled with compressed air in a sealed container and realizes the elastic action by utilizing the compressibility of the air, has ideal nonlinear elastic characteristics, is usually applied to bicycles or motorcycles, is used for reducing the vibration generated in the working process of the bicycles or the motorcycles, improves the riding comfort and has good riding comfort.

The existing air spring only has one air chamber, and the other side of the air spring is replaced by a rubber pad and a spring, so that the air spring can be reset by the aid of the spring. When the air spring is pressed downwards and rebounded, the spring and the rubber gasket collide to generate impact sound, so that the use is influenced; meanwhile, the existing air springs are compressed by springs, the weight of the springs is heavier, most of the air springs are arranged on the front fork, the front fork is heavier, and the use of the front fork is influenced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the double-air-chamber air spring, which replaces the conventional mode that the air spring is reset by a spring, effectively reduces the noise generated in the use process and reduces the weight of the air spring.

The purpose of the invention is realized by adopting the following technical scheme:

a double-air-chamber air spring comprises an inner tube body, an air rod fixing seat, an inner tube fixing seat, a piston assembly and a telescopic rod, wherein the air rod fixing seat and the inner tube fixing seat are respectively arranged at two ends of the inner tube body;

the piston assembly comprises a piston body and a buffer component, a first cavity is arranged in the piston body,

the piston comprises a piston body and is characterized in that an opening communicated with a first air chamber and a first cavity is formed in the surface of the piston body, a gap communicated with the first cavity and a second air chamber is formed between the piston body and a buffering member, an elastic part is arranged in the gap, an air valve switch is arranged in the opening and is in sliding connection with the opening, the lower end of the air valve switch penetrates through the first cavity and is arranged in the buffering member and fixedly connected with the buffering member, a clamping ring is formed on the side wall of the opening, a clamping block matched with the clamping ring is formed on the outer side of the air valve switch, and the clamping block is clamped and fixed with the clamping ring.

Furthermore, the piston body and the buffer member are sequentially sleeved on the telescopic rod, a pin clamped with the telescopic rod is arranged on the piston body, a groove is formed in one end, arranged in the inner tube body, of the telescopic rod, the opening corresponds to a notch of the groove, and the lower end of the air valve switch is slidably arranged in the groove.

Furthermore, a fixing pin is arranged on the buffering component, a through hole for the fixing pin to pass through is formed in the side face of the buffering component, and the fixing pin is suitable for passing through the buffering component and the through hole to be clamped and fixed with the lower end of the air valve switch.

Further, buffer component includes cushion ring and gas stick cooperation piece, gas stick cooperation piece sets up cushion ring left end, the fixed pin sets up on the gas stick cooperation piece.

Furthermore, an air inlet communicated with the first air chamber is formed in the air rod fixing seat.

Furthermore, a sealing ring is arranged on the binding surface of the piston body and the inner pipe body.

Compared with the prior art, the invention has the beneficial effects that:

this application is through piston body, pneumatic valve switch, the cooperation of buffer member and elastic component that sets up to can pressurize for the second air chamber, thereby this bodily form becomes two air chambers at the inner tube, carries out the shock attenuation when can using, has replaced the current mode that utilizes spring and first air chamber complex to carry out the shock attenuation, effectively avoids the spring to send the noise when during operation and inner tube body collision, and the influence is used, simultaneously, has reduced this application air spring's weight.

Drawings

FIG. 1 is a schematic structural view of a dual chamber air spring of the present invention;

FIG. 2 is a cross-sectional view of a dual chamber air spring of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a schematic structural view of a dual chamber air spring piston body of the present invention.

The figure is as follows: 1. an inner tube body; 11. a first air chamber; 12. a second air chamber; 2. a gas stick fixing seat; 3. an inner pipe fixing seat; 4. a piston assembly; 41. a piston body; 411. an opening; 412. a snap ring; 42. an elastic member; 43. a cushion washer; 44. a gas stick matching block; 45. an air valve switch; 451. a clamping block; 5. a telescopic rod.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

As shown in fig. 1-4, the air spring with double air chambers comprises an inner tube body 1, an air rod fixing seat 2, an inner tube fixing seat 3, a piston assembly 4 and a telescopic rod 5, wherein the air rod fixing seat 2 and the inner tube fixing seat 3 are respectively arranged at two ends of the inner tube body 1, the piston assembly 4 is slidably arranged in the inner tube body 1, the air rod fixing seat 2 is matched with the piston assembly 4 and encloses a first air chamber 11, the inner tube fixing seat 3 is matched with the piston assembly 4 and encloses a second air chamber 12, and one end of the telescopic rod 5 penetrates through the inner tube fixing seat 3 and is fixedly connected with the piston assembly 4;

piston assembly 4 includes piston body 41 and buffering component, be provided with first chamber in the piston body 41, piston body 41 surface sets up the opening 411 that communicates first air chamber 11 and first chamber, be formed with the clearance that communicates first chamber and second air chamber 12 between piston body 41 and the buffering component, be provided with elastic component 42 in the clearance, be provided with air valve switch 45 in the opening 411, air valve switch 45 and opening 411 sliding connection, air valve switch 45 lower extreme passes first chamber and places in the buffering component and with buffering component rigid coupling.

When the air valve is in operation, the piston assembly 4 is moved to a state of abutting against the inner tube fixing seat 3, then the air is filled into the first air chamber 11, at this time, the air pressure in the first air chamber 11 rises, the piston body 41 extrudes the elastic member 42 under the action of the air pressure in the first air chamber 11 until the elastic member 42 is pressed to the minimum, at this time, the piston body 41 and the air valve switch 45 move relatively to open the opening 411 (the piston body 41 moves downward relative to the air valve switch 45), the first air chamber 11 is communicated with the second air chamber 12, the air in the first air chamber 11 enters the second air chamber 12 to adjust the pressure in the second air chamber 12, so that the pressures in the first air chamber 11 and the second air chamber 12 are the same, then the air filling into the first air chamber 11 is stopped, at this time, the pressure in the second air chamber 12 is greater than the pressure in the first air chamber 11, the piston body 41 is pushed to move towards the air, so that the air valve switch 45 is matched with the opening 411 again to block the opening 411, thereby separating the first air chamber 11 from the second air chamber 12, and then the piston assembly 4 continues to move towards the first air chamber 11 under the action of the pressure in the second air chamber 12 to extrude the gas in the first air chamber 11 until the pressures in the first air chamber 11 and the second air chamber 12 are consistent, and at this time, the air valve switch can be used as an air spring.

This application is through the piston body 41 that sets up, air valve switch 45, buffer member and the cooperation of elastic component 42 to can pressurize for second air chamber 12, thereby form two air chambers at inner tube body 1, carry out the shock attenuation when can using, it utilizes spring and first air chamber 11 complex mode to carry out the shock attenuation now to have replaced, effectively avoid the spring to send the noise when the during operation collides with inner tube body 1, the influence is used, simultaneously, the weight of this application air spring has been reduced.

Preferably, a clamping ring 412 is formed on the side wall of the opening 411, a clamping block 451 matched with the clamping ring 412 is formed on the outer side of the air valve switch 45, and the clamping block 451 is clamped and fixed with the clamping ring 412 so as to facilitate the installation and positioning of the air valve switch 45.

Preferably, the telescopic rod 5 is sleeved with the piston body 41 and the buffer member in sequence, a pin clamped with the telescopic rod 5 is arranged on the piston body 41, so that the piston body 41 and the telescopic rod 5 are connected into a whole, the telescopic rod 5 is convenient to drive the piston assembly 4 to move, meanwhile, a groove is formed in one end, arranged in the inner pipe body 1, of the telescopic rod 5, the opening 411 corresponds to a notch of the groove, and the lower end of the air valve switch 45 is slidably arranged in the groove, so that the air valve switch 45 can be conveniently moved.

Preferably, the buffering member is provided with a fixing pin, a through hole for the fixing pin to pass through is formed in the side surface of the buffering member, and the fixing pin is suitable for passing through the buffering member and the through hole to be fixedly clamped with the lower end of the air valve switch 45, so that the buffering member and the air valve switch 45 can be connected into a whole, and the stability of the structure is improved.

Preferably, the buffer member includes a buffer washer 43 and a gas stick engagement block 44, the gas stick engagement block 44 being provided at a left end of the buffer washer 43, and a fixing pin being provided on the gas stick engagement block 44.

Preferably, the gas rod fixing seat 2 is provided with a gas inlet communicated with the first gas chamber 11, so that a user can fill gas into the first gas chamber 11 conveniently. Meanwhile, in order to avoid gas leakage in the first air chamber 11 and the second air chamber 12, a sealing ring is disposed on a joint surface of the piston body 41 and the inner tube body 1 to improve the sealing performance, and a mold sealing ring is disposed on the air rod fixing seat 2 and the inner tube fixing seat 3 to ensure the sealing performance of the inner tube body 1.

The piston body 41 is made of plastic steel, so that the weight is light, and the installation is quicker.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. A double air chamber air spring is characterized in that: it comprises an inner tube body, a gas rod holder, an inner tube holder, a piston assembly and a telescopic rod, and the gas rod holder and the inner tube holder are respectively provided with At both ends of the inner tube body, the piston assembly is slidably installed in the inner tube body, the gas rod fixing seat cooperates with the piston assembly and encloses a first air chamber, and the inner tube is fixed The seat cooperates with the piston assembly to form a second air chamber, and one end of the telescopic rod is fixedly connected to the piston assembly through the inner tube fixing seat;

The piston assembly includes a piston body and a buffer member, the piston body is provided with a first cavity, the surface of the piston body is provided with an opening that communicates with the first air chamber and the first cavity, and the piston body is connected to the first cavity. A gap connecting the first cavity and the second air chamber is formed between the buffer members, an elastic member is arranged in the gap, an air valve switch is arranged in the opening, and the air valve switch is slidably connected with the opening , the lower end of the air valve switch passes through the first cavity and is placed in the buffer member and fixed with the buffer member, the side wall of the opening is formed with a snap ring, and the outer side of the air valve switch is formed There is a snap block adapted to the snap ring, and the snap block is clamped and fixed with the snap ring.

2 . The double-air chamber air spring according to claim 1 , wherein the piston body and the buffer member are sequentially sleeved on the telescopic rod, and the piston body is provided with a clamping device with the telescopic rod. 3 . The end of the telescopic rod placed in the inner tube body is provided with a groove, the opening corresponds to the notch of the groove, and the lower end of the air valve switch is slidably arranged in the groove Inside.

3 . The double air chamber air spring according to claim 2 , wherein the buffer member is provided with a fixing pin, the side surface of the buffer member is provided with a through hole for the fixing pin to pass through, and the fixing pin is adapted to fit. 4 . It is clamped and fixed with the lower end of the air valve switch through the through hole.

4 . The double air chamber air spring according to claim 3 , wherein the buffer member comprises a buffer washer and a gas rod matching block, the gas rod matching block is arranged at the left end of the buffer washer, and the fixing pin arranged on the gas bar fitting block.

5 . The double air chamber air spring according to claim 1 , wherein the air rod fixing seat is provided with an air inlet which communicates with the first air chamber. 6 .

6 . The double air chamber air spring according to claim 1 , wherein a sealing ring is provided on the abutment surface of the piston body and the inner tube body. 7 .

7 . The double air chamber air spring according to claim 1 , wherein the piston body is made of plastic steel. 8 .