Improved single-cylinder shock absorber

Abstract

The utility model provides an improved single-cylinder shock absorber, which relates to the technical field of shock absorption equipment and comprises a shock absorber body, the shock absorber body comprises a piston rod, a damping valve piston is fixedly mounted at one end of the piston rod, and an isolation piston is fixedly mounted in the shock absorber body. An oil storage cavity, a working cavity and an air chamber are formed in the shock absorber body, an upper fixing base is arranged on the upper end face of the shock absorber body, and a lower fixing base is arranged on the lower end face of the shock absorber body. The upper mounting seat is sleeved on the surface of the piston rod, and the damping spring, the matched pressing block and the adjusting block are arranged between the lower mounting seat and the upper mounting seat, so that when the adjusting block is rotated, due to the fact that the adjusting block is in threaded connection with the threaded groove at one end of the piston rod, the pressure of the pressing block on the damping spring can be adjusted, and the pre-compression amount of the damping spring is changed. Preliminary adjustment of the overall damping performance of the damper is achieved so as to adapt to different use scenes and load requirements.

Description

Technical Field

[0001] This utility model relates to the field of vibration damping equipment technology, and in particular to an improved monotube vibration damper. Background Technology

[0002] Shock absorbers are used to suppress the oscillations when the spring absorbs shock and rebounds, as well as the impact from the road surface. They are widely used in automobiles to accelerate the attenuation of vibrations in the chassis and body, thereby improving the ride comfort of the vehicle.

[0003] In the existing technology, the damping performance adjustment methods of shock absorbers are limited and not precise enough. The spring force inside the existing shock absorbers is fixed. Most traditional shock absorbers can only change the damping characteristics by replacing springs of different specifications. They cannot be dynamically and precisely adjusted according to the real-time driving conditions of the vehicle, so improvements are needed. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the spring force in existing shock absorbers is fixed and difficult to adjust, and to propose an improved monotube shock absorber.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an improved monotube shock absorber, comprising a shock absorber body, the shock absorber body including a piston rod, a damping valve piston fixedly installed at one end of the piston rod, an isolation piston fixedly installed inside the shock absorber body, an oil reservoir, a working chamber and an air chamber inside the shock absorber body, an upper fixed seat provided on the upper end face of the shock absorber body, a lower fixed seat provided on the lower end face of the shock absorber body, a lower mounting seat fixedly installed on the side of the shock absorber body, an upper mounting seat sleeved on the surface of the piston rod, a damping spring provided between the lower mounting seat and the upper mounting seat, a pressure block provided on the upper surface of the upper mounting seat, an adjusting block fixedly installed on the upper surface of the pressure block, a threaded groove opened at one end of the piston rod, and a guide rod fixedly installed on the surface of the lower mounting seat.

[0006] Preferably, the pressure block and the piston rod are slidably connected, and the adjusting block and the threaded groove are threadedly connected.

[0007] Preferably, the upper mounting base and the guide rod are slidably connected.

[0008] Preferably, the piston rod is provided with a sealing ring A and a sealing ring B on its surface, the shock absorber body is provided with a sealing groove A and a sealing groove B on its inner side, and a dust cover is fixedly installed on the surface of the shock absorber body.

[0009] Preferably, the sealing ring A is fitted into the sealing groove A, the sealing ring B is fitted into the sealing groove B, and the dust cover is located at the connection between the top of the shock absorber body and the piston rod.

[0010] Preferably, the sealing ring A is made of polytetrafluoroethylene, and the sealing ring B is made of natural rubber.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, by fitting an upper mounting seat onto the surface of the piston rod and setting a damping spring between the lower and upper mounting seats, along with a pressure block and an adjusting block, when the adjusting block is rotated, the pressure of the pressure block on the damping spring can be adjusted because the adjusting block is threadedly connected to the threaded groove at one end of the piston rod. This changes the pre-compression of the damping spring, thereby achieving preliminary adjustment of the overall damping performance of the shock absorber to adapt to different usage scenarios and load requirements.

[0013] 2. In this utility model, by setting sealing ring A and sealing ring B on the surface of the piston rod, and installing a dust cover at the connection between the top of the shock absorber body and the piston rod, the sealing ring A made of polytetrafluoroethylene has a low coefficient of friction and good sealing performance, while the sealing ring B made of natural rubber further enhances the sealing effect. The dust cover can prevent dust, impurities, etc. from entering the interior of the shock absorber, effectively improving the sealing performance of the shock absorber, reducing the risk of damping oil leakage, protecting the internal structure, extending the service life of the shock absorber, and ensuring its stable and reliable operation. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of an improved monotube shock absorber is provided for this utility model;

[0015] Figure 2 A cross-sectional view of an improved monotube shock absorber is provided for this utility model;

[0016] Figure 3 An exploded cross-sectional view of an improved monotube shock absorber is presented for this utility model.

[0017] Legend: 1. Shock absorber body; 101. Piston rod; 102. Damping valve piston; 103. Isolation piston; 104. Oil reservoir; 105. Working chamber; 106. Air chamber; 2. Upper fixed seat; 3. Lower fixed seat; 4. Lower mounting seat; 5. Upper mounting seat; 6. Shock absorber spring; 7. Pressure block; 8. Adjusting block; 9. Threaded groove; 10. Guide rod; 11. Sealing ring A; 12. Sealing ring B; 13. Sealing groove A; 14. Sealing groove B; 15. Dust cover. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1: As Figures 1-3 As shown, this utility model provides a technical solution: an improved monotube shock absorber, including a shock absorber body 1, the shock absorber body 1 including a piston rod 101, a damping valve piston 102 fixedly installed at one end of the piston rod 101, an isolation piston 103 fixedly installed inside the shock absorber body 1, an oil reservoir 104, a working chamber 105 and an air chamber 106 provided inside the shock absorber body 1, an upper fixed seat 2 provided on the upper end face of the shock absorber body 1, and a lower fixed seat 3 provided on the lower end face of the shock absorber body 1. A lower mounting base 4 is fixedly installed on the side, and an upper mounting base 5 is sleeved on the surface of the piston rod 101. A shock-absorbing spring 6 is provided between the lower mounting base 4 and the upper mounting base 5. A pressure block 7 is provided on the upper surface of the upper mounting base 5, and an adjusting block 8 is fixedly installed on the upper surface of the pressure block 7. A threaded groove 9 is opened at one end of the piston rod 101, and a guide rod 10 is fixedly installed on the surface of the lower mounting base 4. The pressure block 7 and the piston rod 101 are slidably connected, the adjusting block 8 is threadedly connected to the threaded groove 9, and the upper mounting base 5 is slidably connected to the guide rod 10.

[0021] In this embodiment, by mounting a seat 5 on the surface of the piston rod 101 and setting a damping spring 6 between the lower mounting seat 4 and the upper mounting seat 5, and cooperating with the pressure block 7 and the adjusting block 8, when the adjusting block 8 is rotated, since the adjusting block 8 is threadedly connected to the threaded groove 9 at one end of the piston rod 101, the pressure of the pressure block 7 on the damping spring 6 can be adjusted, thereby changing the pre-compression of the damping spring 6, and realizing the initial adjustment of the overall damping performance of the shock absorber to adapt to different usage scenarios and load requirements.

[0022] Example 2: As Figures 1-3 As shown, the piston rod 101 has a sealing ring A11 and a sealing ring B12 on its surface. The shock absorber body 1 has a sealing groove A13 and a sealing groove B14 on its inner side. A dust cover 15 is fixedly installed on the surface of the shock absorber body 1. The sealing ring A11 is fitted into the sealing groove A13, and the sealing ring B12 is fitted into the sealing groove B14. The dust cover 15 is located at the connection between the top of the shock absorber body 1 and the piston rod 101. The sealing ring A11 is made of polytetrafluoroethylene, and the sealing ring B12 is made of natural rubber.

[0023] In this embodiment, by providing sealing rings A11 and B12 on the surface of piston rod 101, and installing a dust cover 15 at the connection between the top of the shock absorber body 1 and piston rod 101, the sealing ring A11 made of polytetrafluoroethylene has a low coefficient of friction and good sealing performance, while the sealing ring B12 made of natural rubber further enhances the sealing effect. The dust cover 15 can prevent dust, impurities, etc. from entering the interior of the shock absorber, effectively improving the sealing performance of the shock absorber, reducing the risk of damping oil leakage, protecting the internal structure, extending the service life of the shock absorber, and ensuring its stable and reliable operation.

[0024] The working principle of this embodiment is as follows: When installing this improved monotube shock absorber, the shock absorber body 1 is first securely connected to the corresponding position of the equipment to be damped via the upper fixed seat 2 and the lower fixed seat 3, ensuring a firm installation. At this time, the damping valve piston 102 at one end of the piston rod 101 is located in the working chamber 105 inside the shock absorber body 1. The internal isolation piston 103 reasonably separates the oil storage chamber 104, the working chamber 105, and the air chamber 106. The lower mounting seat 4 is fixed to the side of the shock absorber body 1, and the guide rod 10 installed on it plays a guiding role. When the equipment vibrates during operation, the vibration is transmitted to the piston rod 101, causing it to reciprocate up and down. During the movement, the upper mounting seat 5 slides along the guide rod 10 to ensure the stability of the movement. At the same time, the damping spring 6 is installed between the lower mounting seat 4 and the upper mounting seat 5. The movement of the piston rod 101 drives the upper mounting seat 5 to compress or stretch the damping spring 6, playing a preliminary damping and buffering role. If it is necessary to adjust the damping performance, the pressure block 7 can be rotated. The adjusting block 8 is threadedly connected to the threaded groove 9 at one end of the piston rod 101. Rotating the adjusting block 8 will cause it to move within the threaded groove 9, thereby causing the pressure block 7 to slide on the piston rod 101, changing the pressure of the pressure block 7 on the damping spring 6, and adjusting the pre-compression of the damping spring 6 to meet different usage scenarios and load requirements. During the operation of the shock absorber, the sealing rings A11 and B12 on the surface of the piston rod 101 play an important role in preventing damping oil leakage and impurities from entering. The polytetrafluoroethylene sealing ring A11 fits into the sealing groove A13 on the inner side of the shock absorber body 1. With its low coefficient of friction and good sealing performance, it initially blocks the leakage of damping oil. The natural rubber sealing ring B12 further fits into the sealing groove B14 to enhance the sealing effect. In addition, the dust cover 15 located at the connection between the top of the shock absorber body 1 and the piston rod 101 can effectively block the intrusion of dust, impurities, etc., and comprehensively ensure the stability of the internal structure of the shock absorber and maintain normal working conditions.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An improved mono-tube shock absorber comprising a shock absorber body (1), characterized by: The shock absorber body (1) includes a piston rod (101), one end of the piston rod (101) is fixedly installed with a damping valve piston (102), the inside of the shock absorber body (1) is fixedly installed with a separation piston (103), the inside of the shock absorber body (1) is provided with an oil storage cavity (104), a working cavity (105) and an air chamber (106), the upper end surface of the shock absorber body (1) is provided with an upper fixed seat (2), the lower end surface of the shock absorber body (1) is provided with a lower fixed seat (3), the side surface of the shock absorber body (1) is fixedly installed with a lower mounting seat (4), the surface of the piston rod (101) is sleeved with an upper mounting seat (5), the lower mounting seat (4) and the upper mounting seat (5) are provided with a shock absorbing spring (6), the upper surface of the upper mounting seat (5) is provided with a pressing block (7), the upper surface of the pressing block (7) is fixedly installed with an adjusting block (8), one end of the piston rod (101) is provided with a threaded groove (9), the surface of the lower mounting seat (4) is fixedly installed with a guide rod (10).

2. The improved mono-tube shock absorber according to claim 1, characterized by: The pressing block (7) and the piston rod (101) are slidably connected, and the adjusting block (8) and the threaded groove (9) are threadedly connected.

3. The improved mono-tube shock absorber according to claim 1, characterized by: The upper mounting seat (5) and the guide rod (10) are slidably connected.

4. The improved mono-tube shock absorber according to claim 1, characterized by: The surface of the piston rod (101) is provided with a sealing ring A (11) and a sealing ring B (12), the inside of the shock absorber body (1) is provided with a sealing groove A (13) and a sealing groove B (14), and the surface of the shock absorber body (1) is fixedly installed with a dust cover (15).

5. The improved mono-tube shock absorber according to claim 4, characterized in that: The sealing ring A (11) and the sealing groove A (13) are fitly connected, the sealing ring B (12) and the sealing groove B (14) are fitly connected, and the dust cover (15) is located at the connection between the top of the shock absorber body (1) and the piston rod (101).

6. The improved mono-tube shock absorber according to claim 4, characterized by: The sealing ring A (11) is made of polytetrafluoroethylene, and the sealing ring B (12) is made of natural rubber.

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