Damper

Abstract

The damper comprises a working cylinder, a piston rod and a piston assembly, the piston rod is arranged in the working cylinder, one end of the piston rod extends out of the working cylinder, the piston assembly is arranged in the working cylinder in a sliding mode and divides the working cylinder into a first cavity and a second cavity, and a connecting hole communicated with the first cavity and the second cavity is formed in the piston assembly. One end of the piston rod assembly is fixedly connected with the piston rod, the other end of the piston rod assembly is movably connected with an adjusting structure, one end of the adjusting structure extends out of the working cylinder, and the adjusting structure is used for adjusting the flow area of the connecting hole. On one hand, the manufacturing difficulty of the damper is reduced, and on the other hand, the structural strength of the damper is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle shock absorption, in particular to a damper. Background Art

[0002] The car's damper, also known as the shock absorber, is an important part of the car's suspension system. Its main function is to reduce the vibration and impact of the car body, improve driving stability and ride comfort. In a hydraulic damper, when the vehicle encounters bumps or impacts during driving, the damper's piston moves up and down in the cylinder. During this process, the hydraulic oil flows through the damping channel on the piston, generating a damping force to slow down the impact of the wheel on the frame. At present, the hollow piston rod adjustable mechanism is commonly used on the market, which can adjust the damping of the shock absorber to different gears.

[0003] In the prior art, the damping of a hollow piston rod is generally adjusted by hollowing out the inside and setting a control rod and a movable adjustment part. These internal structures increase the complexity of the structure. The complex structure may lead to difficulties in manufacturing and maintenance, as well as an increase in potential failure points. At the same time, the hollow design of the hollow piston rod reduces the structural strength of the piston rod to a certain extent. When the equipment is under high load or extreme working conditions, the hollow piston rod may be deformed or damaged, thereby affecting the damping effect and the stability of the equipment. Utility Model Content

[0004] The utility model aims to provide a damper so as to improve the structural strength of the damper.

[0005] The utility model is realized through the following technical solutions.

[0006] A damper includes a working cylinder, a piston rod disposed in the working cylinder and extending out of the working cylinder at one end, and a piston assembly. The piston assembly is slidably disposed in the working cylinder and separates the working cylinder into a first chamber and a second chamber. The piston assembly is provided with a connecting hole connecting the first chamber and the second chamber. One end of the piston rod assembly is fixedly connected to the piston rod, and the other end is movably connected to an adjustment structure having one end extending out of the working cylinder. The adjustment structure is used to adjust the size of the flow area of ​​the connecting hole.

[0007] As a further improvement of the present invention, the adjustment structure includes an adjustment rod and a adjustment valve, wherein one end of the adjustment rod close to the piston assembly is fixedly connected to the adjustment valve, and the adjustment valve has an adjustment portion that can be inserted into the connecting hole and is coaxially arranged with the connecting hole, and the adjustment rod is movably mounted on the piston assembly so that the adjustment portion connected to the adjustment rod can move along the axial direction of the connecting hole.

[0008] As a further improvement of the present invention, the cross-sectional area of ​​the adjusting portion gradually increases toward the adjusting rod.

[0009] As a further improvement of the present invention, the shape of the adjusting portion is set to be conical.

[0010] As a further improvement of the utility model, the regulating valve is provided with an abutting portion which can abut against the piston assembly to block the connecting hole.

[0011] As a further improvement of the utility model, one end of the piston assembly close to the adjusting rod protrudes outward to form a connecting portion that is sleeved on the adjusting rod, and the adjusting rod and the connecting portion are threadedly matched, so that when the adjusting rod is rotated, the adjusting portion can be driven to move in the connecting hole.

[0012] As a further improvement of the utility model, one end of the piston assembly close to the adjusting rod protrudes outward to form a connecting portion that is sleeved on the adjusting rod, and the adjusting rod and the connecting portion are snap-fitted together, so that when the adjusting rod is pushed, the adjusting portion can be driven to move in the connecting hole.

[0013] As a further improvement of the utility model, guide seals are provided at both ends of the interior of the working cylinder.

[0014] As a further improvement of the utility model, a piston ring which is slidably matched with the inner wall of the working cylinder is embedded on the outer peripheral surface of the piston assembly.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model provides a damper, which realizes the adjustment of the damping force by means of piston rods and adjustment structures respectively arranged at both ends of the piston assembly. Compared with the prior art, on the one hand, the manufacturing difficulty of the damper is reduced, and on the other hand, the structural strength of the damper is increased.

[0017] 2. In the utility model, the flow of the damping medium is controlled according to the cross-sectional area of ​​the regulating part at the front end of the regulating valve extending into the connecting hole, thereby adjusting the damping force. At the same time, the cross-sectional area of ​​the regulating part gradually increases toward the regulating rod, which helps to improve the stability and reliability during adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a detailed description of the preferred implementation examples of the present invention with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0019] Figure 1 This is a structural schematic diagram of a damper of the utility model;

[0020] Figure 2 for Figure 1 A magnified view of part A;

[0021] In the figure:

[0022] 1. working cylinder; 11. first chamber; 12. second chamber; 13. guide seal; 2. piston rod; 3. piston assembly; 31. connecting hole; 32. connecting part; 33. piston ring; 41. adjusting rod; 42. regulating valve; 42a. adjusting part; 42b. abutting part; DETAILED DESCRIPTION

[0023] The utility model is further described in detail below based on the accompanying drawings and implementation cases.

[0024] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0025] This embodiment provides a damper, referring to Figure 1 , including a working cylinder 1, a piston rod 2 disposed in the working cylinder 1 and extending out of the working cylinder 1 at one end, and a piston assembly 3. The piston assembly 3 is slidably disposed in the working cylinder 1 and separates the working cylinder 1 into a first chamber 11 and a second chamber 12. A connecting hole 31 is provided on the piston assembly 3 along the axis of the piston assembly 3. The connecting hole 31 connects the first chamber 11 and the second chamber 12. The piston rod 2 is disposed in the second chamber 12. One end of the piston assembly 3 is fixedly connected to the piston rod 2. When the piston rod 2 is subjected to force, the piston assembly 3 moves in the working cylinder 1, thereby changing the first chamber 11 and the second chamber 12. The volume of the piston assembly 3 causes the damping medium in the first chamber 11 and the second chamber 12 to flow, thereby forming a damping force. At the same time, the other end of the piston assembly 3 is movably connected to an adjustment structure having one end extending out of the working cylinder 1. The adjustment structure is arranged in the first chamber 11. The adjustment structure is used to adjust the size of the flow area of ​​the connecting hole 31, that is, to adjust the flow size of the damping medium in the connecting hole 31, thereby adjusting the size of the damping force. Compared with the prior art, the adjustment structure in the traditional hollow piston rod is abandoned, which reduces the manufacturing difficulty of the damper on the one hand, and increases the structural strength of the damper on the other hand. In this embodiment, the damping medium can be hydraulic oil or damping oil, and the flow of hydraulic oil or damping oil in the connecting hole 31 generates a damping force.

[0026] Further, see Figure 1~2The regulating structure includes a regulating rod 41 and a regulating valve 42. One end of the regulating rod 41 is movably mounted on the piston assembly 3, and the other end extends out of the working cylinder 1. The regulating valve 42 is connected to the end of the regulating rod 41 close to the piston assembly 3. The regulating valve 42 has an regulating portion 42a that can be inserted into the connecting hole 31. The regulating portion 42a is coaxially arranged with the connecting hole 31. The outer diameter of the regulating portion 42a is smaller than the aperture of the connecting hole 31, so that the regulating portion 42a can smoothly enter the connecting hole 31 along the axial direction of the connecting hole 31, and the movement of the regulating portion 42a can be controlled by the regulating rod 41. The flow rate of the damping medium is controlled according to the size of the cross-sectional area of ​​the regulating portion 42a extending into the connecting hole 31, and the damping force is further adjusted.

[0027] Furthermore, in order to facilitate the adjustment of the magnitude of the damping force, the cross-sectional area of ​​the adjusting portion 42a gradually increases in the direction close to the adjusting rod 41. When the adjusting portion 42a moves away from the piston assembly 3, the cross-sectional area of ​​the adjusting portion 42a extending into the connecting hole 31 decreases. When the adjusting portion 42a moves in the direction close to the piston assembly 3, the cross-sectional area of ​​the adjusting portion 42a extending into the connecting hole 31 increases, thereby further improving the stability and reliability during adjustment. In this embodiment, the shape of the adjusting portion 42a is preferably conical. Compared with other shapes of the adjusting portion 42a that meet the requirements, the conical adjusting portion 42a is easier to process.

[0028] Furthermore, an abutment portion 42b for sealing the connecting hole 31 is provided on one end of the regulating valve 42 close to the piston assembly 3. As long as the cross-section of the abutment portion along the axial direction of the connecting hole 31 is larger than the area of ​​the connecting hole 31, when the abutment portion 42b contacts the piston assembly 3, the abutment portion 42b can seal the connecting hole 31, so that the damping medium in the working cylinder 1 cannot flow, that is, the damping force generated by the damper remains unchanged, thereby meeting more usage requirements.

[0029] Preferably, the adjusting rod 41 and the piston assembly 3 are arranged to be threadedly matched, so that when the adjusting rod 41 is rotated, the adjusting portion 42a can be driven to move in the connecting hole 31, as shown in FIG. Figure 2 The end of the piston assembly 3 close to the adjusting rod 41 protrudes outward to form a connecting portion 32 that is sleeved on the outside of the piston rod 2. The inner wall of the connecting portion 32 has an internal thread arranged along the axial direction of the piston assembly 3. Correspondingly, the outer surface of the piston rod 2 has an external thread, so that the adjusting rod 41 can be rotated according to the thread, so that the adjusting portion 42a connected to the adjusting rod 41 can move axially along the connecting hole 31.

[0030] In some embodiments, the adjusting rod 41 and the connecting portion 32 can also be arranged to be snap-fitted, and the inner wall of the connecting portion 32 has a slot arranged axially along the piston assembly 3. Correspondingly, the outer surface of the piston rod 2 has a snap-fitting tooth that movably cooperates with the slot, so that when the adjusting rod 41 is pushed, the adjusting portion 42a can be driven to move in the connecting hole 31.

[0031] In this embodiment, an inwardly recessed connecting groove is provided on the outer circumferential surface of the piston assembly 3, and a piston ring 33 adapted to the connecting groove is provided on the connecting groove. The piston ring 33 slides with the inner wall of the working cylinder 1, so that the piston assembly 3 can smoothly reciprocate in the working cylinder 1. At the same time, the piston ring 33 also plays a sealing role, which is used to block the damping medium on both sides of the piston assembly 3, so that the damping medium can only flow through the connecting hole 31.

[0032] In this embodiment, guide seals 13 are provided at both ends of the working cylinder 1. The guide seals 13 guide the piston rod 2 and the adjusting rod 41 to make linear motion along the axial direction of the working cylinder 1 on the one hand, and are used to seal the damping medium stored in the working cylinder 1 on the other hand.

[0033] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the utility model.

Claims

1. A damper, characterized in that: The invention comprises a working cylinder (1), a piston rod (2) which is arranged in the working cylinder (1) and has one end extending out of the working cylinder (1), and a piston assembly (3); the piston assembly (3) is slidably arranged in the working cylinder (1) and separates the working cylinder (1) into a first chamber (11) and a second chamber (12); the piston assembly (3) is provided with a connecting hole (31) which connects the first chamber (11) and the second chamber (12); one end of the piston assembly (3) is fixedly connected to the piston rod (2), and the other end is movably connected to an adjusting structure having one end extending out of the working cylinder (1); the adjusting structure is used to adjust the flow area of ​​the connecting hole (31).

2. A damper according to claim 1, characterized in that: The regulating structure comprises a regulating rod (41) and a regulating valve (42); one end of the regulating rod (41) close to the piston assembly (3) is fixedly connected to the regulating valve (42); the regulating valve (42) comprises a regulating portion (42a) disposed in the connecting hole (31) and coaxially arranged with the connecting hole (31); the regulating rod (41) is movably mounted on the piston assembly (3) so that the regulating portion (42a) connected to the regulating rod (41) can move along the axial direction of the connecting hole (31).

3. A damper according to claim 2, characterized in that: The cross-sectional area of ​​the adjusting portion (42a) gradually increases in a direction approaching the adjusting rod (41).

4. A damper according to claim 3, characterized in that: The shape of the adjusting portion (42a) is set to be conical.

5. A damper according to claim 2, characterized in that: The regulating valve (42) is provided with abutting portion (42b) capable of abutting against the piston assembly (3) to block the connecting hole (31).

6. A damper according to claim 2, characterized in that: One end of the piston assembly (3) close to the adjusting rod (41) protrudes outward to form a connecting portion (32) sleeved on the adjusting rod (41); the adjusting rod (41) and the connecting portion (32) are threadedly matched, so that when the adjusting rod (41) is rotated, the adjusting portion (42a) can be driven to move in the connecting hole (31).

7. A damper according to claim 2, characterized in that: One end of the piston assembly (3) close to the adjusting rod (41) protrudes outward to form a connecting portion (32) sleeved on the adjusting rod (41); the adjusting rod (41) and the connecting portion (32) are in a snap-fitting manner, so that when the adjusting rod (41) is pushed, the adjusting portion (42a) can be driven to move in the connecting hole (31).

8. A damper according to claim 2, characterized in that: Guide seals (13) are provided at both ends of the interior of the working cylinder (1).

9. A damper according to claim 1, characterized in that: A piston ring (33) is embedded on the outer peripheral surface of the piston assembly (3) and is slidably matched with the inner wall of the working cylinder (1).

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