Double-cavity air spring shock absorber

Abstract

The utility model discloses a double-cavity air spring shock absorber which comprises a damper and a double-cavity air spring assembly. The double-cavity air spring assembly comprises a main air chamber arranged in the axial direction of the damper, an auxiliary air chamber located on the transverse outer side of the main air chamber and an air exchange channel used for communicating the main air chamber with the auxiliary air chamber, and a control valve used for controlling on-off of the air exchange channel is arranged in the air exchange channel. According to the double-cavity air spring shock absorber, the requirement for the axial arrangement space can be lowered, meanwhile, the larger rigidity adjusting range of the air spring can be achieved, and therefore the driving comfort and controllability of a vehicle are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of air spring shock absorber for vehicle, concretely relates to a double cavity air spring shock absorber. BACKGROUND

[0002] Air spring shock absorber for vehicle is a kind of suspension system using compressed air as elastic medium, usually by air spring part and hydraulic damper part, air spring is responsible for support, and hydraulic damping part controls vibration attenuation, compared with traditional metal spring or hydraulic shock absorber, with better adaptability and better driving experience.The traditional single cavity air spring shock absorber, gas chamber volume is limited and can not be adjusted, for the improvement effect of driving comfort and controllability needs to be improved.The related technology is developed and designed double cavity air spring shock absorber on the basis of traditional single cavity structure, the volume of main gas chamber is adjusted by vice gas chamber, to realize the adjustment of air spring stiffness.But in the structure of existing double cavity air spring shock absorber, vice gas chamber is basically arranged along the axial direction of main gas chamber, and this structure requires larger axial arrangement space, and is not suitable for the use requirement of limited axial installation space.For example, in the structure of existing motorcycle air spring shock absorber, the axial installation size of shock absorber is limited, so that the size of vice gas chamber cannot be designed too large, and the stiffness difference of air spring in double cavity and single cavity state is not significant, that is, the adjustment range of stiffness is limited, and the improvement effect of riding comfort and controllability is limited.

[0003] Therefore, it is necessary to develop and design a new double cavity air spring shock absorber, which can realize greater stiffness adjustment range of air spring under the premise of reducing the demand for axial space, thereby improving the driving comfort and controllability of vehicle. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a double cavity air spring shock absorber, which can reduce the demand for axial arrangement space, and can realize greater stiffness adjustment range of air spring, thereby improving the driving comfort and controllability of vehicle.

[0005] To achieve the above object, the utility model provides the following technical scheme: a double cavity air spring shock absorber, comprising a damper and a double cavity air spring assembly;The double cavity air spring assembly comprises a main gas chamber arranged in the axial direction of the damper, a vice gas chamber located on the lateral outer side of the main gas chamber and a gas exchange channel for connecting the main gas chamber and the vice gas chamber, and the gas exchange channel is provided with a control valve for controlling the on-off of the gas exchange channel.

[0006] Further, the damper comprises an outer cylinder and a piston rod arranged in the outer cylinder; the double-cavity air spring assembly comprises an upper support and an air bag, the upper support is fixed to an upper end of the piston rod, two ends of the air bag are respectively sealed and fixedly connected with the upper support and the outer cylinder, and a main air chamber is formed between the air bag, the upper support and the outer cylinder.

[0007] Further, the double-cavity air spring assembly further comprises an outer cylinder fixed to the upper support and arranged in parallel or approximately parallel with the axis direction of the main air chamber, and a secondary air chamber is formed between the outer cylinder and the upper support.

[0008] Further, the air exchange channel comprises a control valve mounting cavity arranged on the upper support, a first communication hole for communicating the control valve mounting cavity with the secondary air chamber and a second communication hole for communicating the control valve mounting cavity with the main air chamber, and the control valve is arranged in the control valve mounting cavity.

[0009] Further, the upper support is provided with a protruding body protruding outward along the radial direction of the piston rod, and the outer cylinder is fixed to the protruding body; the control valve mounting cavity is arranged along the radial direction of the piston rod and penetrates outward along the radial direction of the protruding body, and a control valve limiting assembly abutting against the control valve is arranged at an end of the control valve mounting cavity away from the second communication hole.

[0010] Further, the control valve limiting assembly comprises an annular rubber pad abutting against the top of the control valve, an annular pressing plate arranged on the top of the annular rubber pad and a limiting stop ring arranged in the control valve mounting cavity and blocking the annular pressing plate.

[0011] Further, the outer cylinder is detachably fixedly connected with the upper support.

[0012] Further, the upper support is provided with an inner threaded hole, and the outer cylinder is threadedly connected with the inner threaded hole.

[0013] Further, the top of the upper support is fixed with an upper joint, the piston rod is threadedly connected with the upper joint after extending upwardly and penetrating through the upper support, and a back tightening nut is arranged on the piston rod and abutting against the upper joint.

[0014] Further, the upper support is provided with a gas filling nozzle in communication with the main air chamber and used for externally connecting an external gas filling pipe.

[0015] Compared with the prior art, the damper has the following beneficial effects:

[0016] The double-cavity air spring shock absorber can reduce the demand for axial arrangement space, and can realize greater stiffness adjustment range of the air spring, thereby improving the driving comfort and maneuverability of the vehicle.

[0017] Other advantages, objects, and features of the present application will be apparent to those skilled in the art from the following specification, in which the following detailed description is provided. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a sectional view structure schematic view of an embodiment of the present application;

[0019] Fig. 2 is a sectional view structure schematic view of an embodiment of the present application;

[0020] Fig. 3 is a sectional view structure schematic view of an embodiment of the present application;

[0021] Reference signs: 1 - shock absorber body; 101 - outer cylinder; 102 - piston rod; 2 - double-cavity air spring assembly; 2a - main air chamber; 2b - auxiliary air chamber; 2c - air exchange channel; 201 - control valve; 202 - upper support; 202a - control valve mounting cavity; 202b - first communication hole; 202c - second communication hole; 2021 - convex body; 2022 - internal thread hole; 2023 - inflation nozzle; 203 - air bag; 204 - outer air cylinder; 205 - control valve limiting assembly; 205a - annular rubber pad; 205b - annular pressing plate; 205c - limiting check ring; 3 - upper joint; 4 - back-up nut. DETAILED DESCRIPTION

[0022] The embodiments of the present application will be described in detail below with specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present application. The present application can also be implemented or applied in other different specific embodiments, and various modifications or changes can be made to the details in the present specification based on different views and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following examples are only used to illustrate the basic concept of the present application, and the features in the following examples and embodiments can be combined with each other without conflict.

[0023] Please refer to Figs. 1-3 In the embodiment, a double-cavity air spring shock absorber is disclosed, which comprises a damper 1 and a double-cavity air spring assembly 2; the double-cavity air spring assembly 2 comprises a main air chamber 2a arranged axially on the damper 1, a secondary air chamber 2b arranged laterally outside the main air chamber 2a, and an air exchange channel 2c for connecting the main air chamber 2a and the secondary air chamber 2b, and the air exchange channel 2c is provided with a control valve 201 for controlling the opening and closing of the air exchange channel 2c. It can be understood that, consistent with the conventional air spring shock absorber for vehicles, the damper 1 here is usually a hydraulic damper, and the hydraulic damper and the double-cavity air spring assembly 2 together constitute the suspension system of the vehicle. The control valve 201 is usually an electromagnetic control valve, which realizes electric automatic control. Here, the meaning of "lateral" in the "lateral side" of the main air chamber 2a is that any radial direction of the main air chamber 2a is the lateral direction of the main air chamber 2a; "outside" refers to one side outside the main air chamber 2a. In the normal driving process, the control valve 201 is in an open state, the main and secondary air chambers are connected and work together, the air spring provides a small stiffness, which is a soft mode, and can provide more comfort to the passengers; in the working conditions of sudden acceleration, deceleration, turning, etc., the control valve 201 is closed, the main air chamber 2a works as a single air chamber, the air spring provides a large stiffness, which is more safe and beneficial to bring stronger controllability.

[0024] The double-cavity air spring shock absorber structure provided above can reduce the demand for axial arrangement space, and can realize a larger stiffness adjustment range of the air spring, thereby improving the driving comfort and controllability of the vehicle. Specifically, the double-cavity air spring shock absorber reasonably utilizes the space outside the shock absorber in the lateral direction, the volume of the main air chamber 2a can be adjusted by the secondary air chamber 2b arranged outside the main air chamber 2a in the lateral direction, a larger size secondary air chamber 2b can be arranged outside the shock absorber in the lateral direction, thereby a larger volume difference in single and double cavity states can be realized, that is, a larger stiffness adjustment range of the air spring can be realized, thereby more different driving conditions can be adapted, and the driving comfort and controllability of the vehicle are improved; since the secondary air chamber 2b is arranged outside the main air chamber 2a in the lateral direction, it does not need to occupy too much axial space, which is beneficial to meet the use requirements under the condition that the axial space size is limited, and is particularly suitable for use in motorcycles.

[0025] In the embodiment, the damper 1 comprises an outer cylinder 101 and a piston rod 102 arranged on the outer cylinder 101; the double-cavity air spring assembly 2 comprises an upper support 202 and an air bag 203, the upper support 202 is fixedly arranged on the upper end of the piston rod 102, the air bag 203 is sealingly and fixedly connected with the upper support 202 and the outer cylinder 101 respectively, and a main gas chamber 2a is formed between the air bag 203, the upper support 202 and the outer cylinder 101. It can be understood that the piston rod 102 is movably arranged in the outer cylinder 101 for driving the piston in the outer cylinder 101 to move, which is consistent with the structure of the existing hydraulic damper, and will not be described here. One end of the air bag 203 is locked, sealed and fixed with the upper support 202 through a buckling ring, and an air bag piston is fixedly arranged on the outer cylinder 101, and the other end of the air bag 203 is locked, sealed and fixed with the air bag piston through a buckling ring. In use, the air bag 203 moves up and down with the outer cylinder 101 to realize the reciprocating motion of compression and recovery. In addition, a limiting cover and a dust cover are arranged outside the air bag 203 here to improve the durability and reliability in use. The main gas chamber 2a in the structure design is simple in structure and easy to process.

[0026] In the embodiment, the double-cavity air spring assembly 2 further comprises an outer cylinder 204 fixedly arranged on the upper support 202 and arranged parallel or approximately parallel to the axis direction of the main gas chamber 2a, and a secondary gas chamber 2b is formed between the outer cylinder 204 and the upper support 202. Here, the meaning of "approximately parallel" is that there is a certain processing and assembly error. By arranging the outer cylinder 204 parallel or approximately parallel to the axis direction of the main gas chamber 2a, the space utilization rate of the shock absorber in the transverse direction is high, the transverse dimension is small, so that the overall structure is compact, which is beneficial to the arrangement and use in a narrow space and to the improvement of the compactness of the whole vehicle arrangement.

[0027] In the embodiment, the air exchange channel 2c comprises a control valve mounting cavity 202a arranged on the upper support 202, a first communication hole 202b for communicating the control valve mounting cavity 202a with the secondary gas chamber 2b, and a second communication hole 202c for communicating the control valve mounting cavity 202a with the main gas chamber 2a, and the control valve 201 is mounted in the control valve mounting cavity 202a. Here, the control valve 201 is an electromagnetic control valve, the valve core of the electromagnetic control valve is arranged opposite to the second communication hole 202c for controlling the opening and closing of the second communication hole 202c. The air exchange channel 2c in the structure design is integrated in the upper support 202, which is simple in structure and beneficial to the stable installation of the control valve 201, and has good compactness and good appearance.

[0028] In the embodiment, the upper support 202 is provided with a protruding body 2021 extending radially outwardly from the piston rod 102, and the outer cylinder 204 is fixed to the protruding body 2021; the control valve mounting cavity 202a is arranged along the radial direction of the piston rod 102 and penetrates the protruding body 2021 radially outwardly, and a control valve limiting assembly 205 is arranged at the end of the control valve mounting cavity 202a away from the second communication hole 202c and abuts against the control valve 201. By arranging the protruding body 2021 extending radially outwardly from the piston rod 102, the installation of the outer cylinder 204 can be facilitated, the space occupied by the piston rod 102 in the circumferential direction is small, and the compactness of the shock absorber structure can be further improved. By arranging the control valve mounting cavity 202a along the radial direction of the piston rod 102 and penetrating the protruding body 2021 radially outwardly, the disassembly and maintenance of the control valve 201 can be facilitated; at the same time, the radial arrangement makes the installation space requirement of the control valve 201 in the axial direction of the piston rod 102 small, and the use requirement in the case of limited axial installation space can be better met.

[0029] In the embodiment, the control valve limiting assembly 205 includes an annular rubber pad 205a abutting against the top of the control valve 201, an annular pressing plate 205b arranged on the top of the annular rubber pad 205a, and a limiting stop ring 205c arranged in the control valve mounting cavity 202a and blocking the annular pressing plate 205b. Here, the limiting stop ring 205c can be a C-shaped stop ring, and the annular pressing plate 205b is made of nylon. The control valve limiting assembly 205 in the structure design is convenient to disassemble and assemble. The annular pressing plate 205b is used to support the limiting stop ring 205c, and the annular rubber pad 205a is designed to have a certain compression amount, so that the control valve 201 is not easy to loosen during use, the noise during back and forth movement is prevented, the use reliability is improved, and the noise is reduced.

[0030] In the embodiment, the outer cylinder 204 is detachably fixed to the upper support 202. By using the detachable fixed connection, the assembly can be facilitated, the production cost can be reduced, and the disassembly and maintenance in the later period can be facilitated.

[0031] In the embodiment, the upper support 202 is provided with an internal threaded hole 2022, and the outer cylinder 204 is threadedly connected to the internal threaded hole 2022. By arranging the internal threaded hole 2022 on the upper support 202, the outer cylinder 204 can be arranged closer to the upper support 202, the space arrangement size requirement in the transverse direction of the piston rod 102 is small, and the compactness of the overall structure of the shock absorber can be further improved. Of course, it can be understood that the sealing needs to be ensured when the outer cylinder 204 is connected, and a sealing ring is arranged between the outer cylinder 204 and the upper support 202. Of course, the connection method is convenient to install.

[0032] In the embodiment, the top of the upper support 202 is fixed with an upper joint 3, the piston rod 102 extends upward through the upper support 202 and is screwed with the upper joint 3, and a back nut 4 is arranged on the piston rod 102 and abuts against the upper joint 3. The upper joint 3 is arranged to facilitate the connection with the vehicle body and improve the convenience of use. Specifically, during assembly, the piston rod 102 is first inserted through the upper support 202, then the upper joint 3 and the back nut 4 are locked by torque, and then the upper joint 3 is fixed with the upper support 202 by screws. In the structure, the upper joint 3, the upper support 202 and the piston rod 102 are installed in a convenient and stable manner, which can effectively prevent the piston rod 102 and the upper support 202 from loosening due to relative rotation during use.

[0033] In the embodiment, the upper support 202 is provided with an inflation nozzle 2023 connected with the main air chamber 2a and used for connecting an external inflation pipe. Specifically, the inflation nozzle 2023 is arranged on the top end surface of the upper support 202. The inflation nozzle 2023 facilitates the air supplement or pressure adjustment of the main air chamber 2a and improves the convenience of use.

[0034] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A dual chamber air spring shock absorber characterized by: The damping device (1) and the double-cavity air spring assembly (2) are provided. The double-cavity air spring assembly (2) comprises a main air chamber (2a) arranged axially to the damping device (1), a secondary air chamber (2b) arranged laterally to the main air chamber (2a), and an air exchange channel (2c) for connecting the main air chamber (2a) and the secondary air chamber (2b), wherein the air exchange channel (2c) is provided with a control valve (201) for controlling the opening and closing of the air exchange channel (2c).

2. The dual chamber air spring shock absorber of claim 1, wherein: The damping device (1) comprises an outer cylinder (101) and a piston rod (102) arranged on the outer cylinder (101). The double-cavity air spring assembly (2) comprises an upper support (202) and an air bag (203), wherein the upper support (202) is fixedly arranged on the upper end of the piston rod (102), the air bag (203) is fixedly connected to the upper support (202) and the outer cylinder (101) respectively, and the main air chamber (2a) is formed between the air bag (203), the upper support (202) and the outer cylinder (101).

3. The dual chamber air spring shock absorber of claim 2, wherein: The double-cavity air spring assembly (2) further comprises an outer cylinder (204) fixedly arranged on the upper support (202) and parallel or approximately parallel to the axis of the main air chamber (2a), and the secondary air chamber (2b) is formed between the outer cylinder (204) and the upper support (202).

4. The dual chamber air spring shock absorber of claim 3, wherein: The air exchange channel (2c) comprises a control valve mounting cavity (202a) arranged on the upper support (202), a first communication hole (202b) for connecting the control valve mounting cavity (202a) and the secondary air chamber (2b), and a second communication hole (202c) for connecting the control valve mounting cavity (202a) and the main air chamber (2a), and the control valve (201) is arranged in the control valve mounting cavity (202a).

5. The dual chamber air spring shock absorber of claim 4, wherein: The upper support (202) is provided with a protruding body (2021) extending radially outward from the piston rod (102), and the outer cylinder (204) is fixedly arranged on the protruding body (2021). The control valve mounting cavity (202a) is arranged in the radial direction of the piston rod (102) and penetrates the protruding body (2021) radially outward, and a control valve limiting assembly (205) is arranged at the end of the control valve mounting cavity (202a) away from the second communication hole (202c) and abuts against the control valve (201).

6. The dual chamber air spring shock absorber of claim 5, wherein: The control valve limiting assembly (205) comprises an annular rubber pad (205a) abutting against the top of the control valve (201), an annular pressing plate (205b) arranged on the top of the annular rubber pad (205a), and a limiting stop ring (205c) arranged in the control valve mounting cavity (202a) and blocking the annular pressing plate (205b).

7. The dual chamber air spring shock absorber of claim 3, wherein: The outer cylinder (204) is detachably fixedly connected to the upper support (202).

8. The dual chamber air spring shock absorber of claim 7, wherein: The upper support (202) is provided with an internally threaded hole (2022), and the outer cylinder (204) is threadedly connected to the internally threaded hole (2022).

9. The dual chamber air spring shock absorber of claim 2, wherein: The upper end of the upper support (202) is fixedly provided with an upper joint (3), the piston rod (102) extends upwardly and penetrates the upper support (202), and then is threadedly connected to the upper joint (3), and a back tightening nut (4) is arranged on the piston rod (102) and abuts against the upper joint (3).

10. The dual chamber air spring shock absorber of claim 2, wherein: The upper support (202) is provided with a gas inlet nozzle (2023) connected with the main gas chamber (2a) and used for connecting an external gas inlet pipe.

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