Active shock absorber

Abstract

The utility model provides an active shock absorber. The active shock absorber comprises an outer cylinder; the inner cylinder is arranged in the outer cylinder; the piston rod is telescopically arranged on the central axis of the inner cylinder, the periphery of the piston rod is sleeved with a piston, the periphery of the piston is in sliding connection with the inner wall of the inner cylinder, a compression cavity is formed between the bottom wall of the inner cylinder and the piston, and the volume of the compression cavity changes along with the change of the stretching or compression length of the piston rod relative to the inner cylinder. The piston rod is provided with a communicating pipe penetrating through the piston rod along the central axis, and the communicating pipe is communicated with the compression cavity so that the compression cavity can be connected with an external oil way. The compression cavity with the variable volume is arranged and communicated with the external oil way through the communicating pipe arranged on the piston rod, and active adjustment of damping force of the shock absorber can be achieved by controlling the amount of oil entering and exiting the compression cavity and the flowing speed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shock absorber technical field especially relates to a kind of active shock absorber. BACKGROUND

[0002] In the field of vehicle engineering, shock absorber is an important component of suspension system, and its main function is to absorb and reduce the vibration and impact from the road, so as to improve the vehicle handling stability, ride comfort and driving safety.

[0003] Traditional shock absorber mostly adopts passive design, that is, its damping characteristics (such as damping force and damping coefficient) are fixed, and cannot be adjusted according to actual situation and dynamic response of vehicle, which leads to that shock absorber may not provide the best damping effect under certain working conditions, and further affect the vehicle handling and ride comfort.

[0004] In view of this, we propose an active shock absorber to solve the existing problems. SUMMARY

[0005] In view of the above problems, the utility model provides an active shock absorber.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An active shock absorber comprises:

[0008] An outer cylinder;

[0009] An inner cylinder is arranged in the outer cylinder;

[0010] A piston rod is telescopically arranged on the central axis of the inner cylinder, the outer periphery of the piston rod is sleeved with a piston, the outer periphery of the piston is in sliding connection with the inner wall of the inner cylinder, the bottom wall of the inner cylinder and the piston form a compression chamber with a volume that changes with the length of the piston rod being stretched or compressed relative to the inner cylinder, and the piston rod is provided with a communication pipe penetrating the piston rod along the central axis, which is in communication with the compression chamber, so that the compression chamber is connected with the external oil circuit.

[0011] Preferably, the inner cylinder is nested in the outer cylinder, and the outer wall of the inner cylinder is in abutting connection with the inner wall of the outer cylinder.

[0012] Preferably, the inner cylinder is provided with a guide seat at one end away from the bottom wall, and the guide seat is provided with a through hole penetrating the guide seat along the central axis, for the piston rod to pass through.

[0013] Preferably, a sealing ring is arranged between the through hole of the guide seat and the outer periphery of the piston rod to realize sealing connection.

[0014] Preferably, the outer cylinder is provided with a snap-fit ​​ring at the end away from the bottom wall. The outer ring of the snap-fit ​​ring is integrally connected to the outer cylinder. The inner ring of the snap-fit ​​ring extends along the radial direction of the outer cylinder to form a snap-fit ​​part with an inner diameter larger than the inner diameter of the outer cylinder. One end of the inner side of the snap-fit ​​part abuts against a limiting ring. The other end of the limiting ring abuts against the end face of the guide seat away from the inner cylinder.

[0015] Preferably, the bottom of the outer cylinder is connected to a lifting ring, the lifting ring is hollow along the axial direction, and a bushing is provided in the inner wall of the lifting ring.

[0016] Compared with the prior art, the beneficial effects of this utility model are: by setting a compression chamber with variable volume and connecting the compression chamber to the external oil circuit through a connecting pipe on the piston rod, the damping force of the shock absorber can be actively adjusted by controlling the amount and flow speed of oil entering and leaving the compression chamber. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0018] In the diagram: 1. Outer cylinder; 2. Inner cylinder; 3. Compression chamber; 4. Piston; 5. Piston rod; 6. Connecting pipe; 7. Guide seat; 8. Snap ring; 9. Lifting ring; 10. Bushing; 11. Limiting ring. Detailed Implementation

[0019] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0020] like Figure 1 As shown, the present invention proposes an active vibration damper, comprising:

[0021] outer cylinder 1;

[0022] Inner cylinder 2 is installed inside outer cylinder 1;

[0023] The piston rod 5 is telescopically arranged on the central axis of the inner cylinder 2, and the outer periphery of the piston rod 5 is sleeved with the piston 4. The outer periphery of the piston 4 is in sliding connection with the inner wall of the inner cylinder 2. The bottom wall of the inner cylinder 2 and the piston 4 form a compression chamber 3 with a volume that changes with the length of the piston rod 5 being stretched or compressed relative to the inner cylinder 2. The piston rod 5 is provided with a communication pipe 6 penetrating the piston rod 5 along the central axis. The communication pipe 6 is in communication with the compression chamber 3, so that the compression chamber 3 is connected with the external oil circuit. The communication pipe 6 allows the oil in the compression chamber 3 to exchange with the external oil circuit, thereby allowing the shock absorber to adjust its damping effect in real time according to the road conditions and driving conditions. The dynamic adjustment capability can significantly improve the suspension comfort and stability of the vehicle. During the damping process, the oil in the compression chamber 3 is connected with the external oil circuit through the communication pipe 6, so that the pressure balance can be more effectively achieved, and the failure or damage of the shock absorber caused by uneven pressure can be reduced. At the same time, the communication pipe 6 also plays a buffering role, which can absorb and disperse part of the impact energy.

[0024] Further, the inner cylinder 2 is nested and installed in the outer cylinder 1, and the outer wall of the inner cylinder 2 is in close connection with the inner wall of the outer cylinder 1, so that the oil liquid cannot leak between the outer cylinder 1 and the outer cylinder 1. The close connection between the inner cylinder 2 and the outer cylinder 1 forms an effective sealing interface, which can prevent the oil liquid in the shock absorber from leaking between the outer cylinder 1 and the external environment under high pressure or vibration conditions. Due to the sealing between the inner cylinder 2 and the outer cylinder 1, the oil liquid in the shock absorber can maintain a certain pressure during the extension and contraction of the piston rod 5, thereby effectively transmitting and absorbing vibration energy, which helps to improve the damping effect and response speed of the shock absorber.

[0025] Further, the inner cylinder 2 is provided with a guide seat 7 away from the bottom wall. The guide seat 7 is provided with a through hole penetrating the guide seat 7 along the central axis, for the piston rod 5 to pass through. The guide seat 7 provides a precise guiding and positioning function for the piston rod 5. When the piston rod 5 extends and contracts in the inner cylinder 2, the guide seat 7 can ensure that the piston rod 5 moves smoothly along the central axis, preventing it from deviating from the track or tilting, which helps to maintain the stability and reliability of the shock absorber. Moreover, the contact area between the guide seat 7 and the piston rod 5 is relatively small, thereby reducing the friction and wear between the two, and reducing the heat and noise generated by friction.

[0026] Further, a sealing ring is arranged between the through hole of the guide seat 7 and the outer periphery of the piston rod 5 to realize sealing connection. The main function of the sealing ring is to prevent the oil liquid in the shock absorber from leaking out of the gap between the through hole of the guide seat 7 and the piston rod 5, and to ensure the stability of the oil pressure in the shock absorber, which helps the shock absorber to more effectively absorb and disperse vibration energy, and improve the suspension performance of the vehicle.

[0027] Further, the outer cylinder 1 is provided with a clamping ring 8 away from the bottom wall, the outer ring of the clamping ring 8 is connected with the outer cylinder 1 integrally, the inner ring of the clamping ring 8 extends along the radial direction of the outer cylinder 1 to form a clamping part with a larger inner diameter than the outer cylinder 1, the inner side of the clamping part is provided with a limiting ring 11, the other end of the limiting ring 11 abuts against the end face of the guide seat 7 away from the inner cylinder 2, the design of the clamping ring 8 makes the connection between the outer cylinder and other components more firm, the abutting action of the limiting ring 11 and the guide seat 7 further enhances the connection strength between the inner cylinder 2 and the outer cylinder 1, ensures that the shock absorber will not loosen or be damaged due to excessive force in the vibration process, the limiting ring 11 limits the axial movement range of the guide seat 7 and the inner cylinder 2 in the outer cylinder 1, thereby ensuring that the shock absorber can maintain a stable motion trajectory during extension and contraction, and the abutting surface of the guide seat 7 and the limiting ring 11 can be used as a guide surface during the extension and contraction of the piston rod 5, reducing the deflection and shaking of the piston rod 5 during movement, and improving the stability and damping effect of the shock absorber.

[0028] Further, the bottom of the outer cylinder 1 is connected with a lifting ring 9, the lifting ring 9 is hollow along the axial direction, and the inner wall of the lifting ring 9 is provided with a bushing 10.

[0029] The working principle of the utility model is: the active shock absorber comprises an outer cylinder 1, an inner cylinder 2 and a piston rod 5, the inner cylinder 2 is nestedly installed inside the outer cylinder 1, and the piston rod 5 is installed on the central axis of the inner cylinder 2 in a telescopic manner, the piston rod 5 is provided with a piston 4 around, the piston rod 5 is connected with the inner cylinder 2 in a closed manner, and a compression cavity 3 is formed between the bottom wall of the inner cylinder 2 and the piston 4, the volume of the compression cavity 3 changes along with the stretching or compression of the piston rod 5 relative to the inner cylinder 2, hydraulic oil is introduced into the compression cavity 3 through an external oil circuit, when the piston rod 5 is compressed or stretched relative to the inner cylinder 2 under the action of force, the volume of the compression cavity 3 changes, thereby causing the flow of oil between the compression cavity 3 and the external oil circuit, the damping force of the shock absorber can be actively adjusted by controlling the oil flow amount and flow speed, and the flow of oil between the compression cavity 3 and the external oil circuit can effectively absorb vibration, thereby achieving the effect of active damping.

[0030] The above specific embodiments are only several preferred embodiments of the utility model, based on the technical scheme of the utility model and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An active damper, characterized in that The utility model relates to a kind of piston pump, including: Outer cylinder (1); Inner cylinder (2) is arranged in outer cylinder (1); Piston rod (5) is telescopically arranged on the central axis of inner cylinder (2), the outer periphery of the piston rod (5) is sleeved with piston (4), the outer periphery of the piston (4) is slidably connected between the inner wall of inner cylinder (2), the bottom wall of the inner cylinder (2) and the piston (4) are formed with compression cavity (3) with the volume changing with the length of piston rod (5) being stretched or compressed relative to inner cylinder (2), the piston rod (5) is provided with communication pipe (6) penetrating piston rod (5) along the central axis, the communication pipe (6) is communicated with compression cavity (3), so that compression cavity (3) is connected with external oil circuit.

2. A positive damper according to claim 1, characterized in that: The inner cylinder (2) is nested in the outer cylinder (1), and the outer wall of the inner cylinder (2) is connected with the inner wall of the outer cylinder (1).

3. A positive damper according to claim 2, characterized in that: The inner cylinder (2) is provided with a guide seat (7) away from the bottom wall, the guide seat (7) is provided with a through hole penetrating the guide seat (7) along the central axis, for the piston rod (5) to pass through.

4. A positive damper according to claim 3, characterized in that: The through hole of the guide seat (7) and the outer periphery of the piston rod (5) are provided with a sealing ring to realize sealed connection.

5. A positive damper according to claim 4, characterized in that: The outer cylinder (1) is provided with a clamping ring (8) away from the bottom wall, the outer ring of the clamping ring (8) is integrally connected with the outer cylinder (1), the inner ring of the clamping ring (8) extends along the radial direction of the outer cylinder (1) to form a clamping part with an inner diameter larger than the inner diameter of the outer cylinder (1), the inner side of the clamping part is provided with a limiting ring (11) at one end, the other end of the limiting ring (11) abuts against the end face of the guide seat (7) away from the inner cylinder (2).

6. The active damper of claim 1, wherein: The outer The bottom of the outer cylinder (1) is connected with a lifting ring (9), the lifting ring (9) is hollow along the axial direction, and the inner wall of the lifting ring (9) is provided with a bushing (10).

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