A vibration damper with adjustable damping speed

Abstract

This utility model relates to a vibration damper with adjustable damping speed, comprising a cylinder and a piston rod movably connected, a piston installed at one end of the piston rod near the cylinder and slidably connected to the inner wall of the cylinder, a support rod installed inside the cylinder at one end away from the piston rod and having a hollow internal structure, a connecting rod installed inside the support rod and passing through the high-pressure nitrogen chamber at one end away from the piston rod, and a control valve installed at the end of the support rod near the piston rod and controlled by the rotation of the connecting rod. As a vibration damper with adjustable damping speed, this utility model allows for the pre-design of the damper's force and compression or elongation amplitude range based on the weight of the carrier and the amplitude during operation, thereby adjusting to the most ideal value and minimizing the amplitude.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper technology, and specifically to a vibration damper with adjustable damping speed. Background Technology

[0002] In traditional vibration damper applications, when a carrier equipped with a traditional vibration damper encounters an impact or collision, the traditional vibration damper cannot control the vibration speed and instantaneous amplitude of the carrier according to the force of the impact or collision. The traditional vibration damper only absorbs a small portion of the energy, and the carrier will still vibrate according to the magnitude of the vibration speed and instantaneous amplitude. Utility Model Content

[0003] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a vibration damper with adjustable damping speed.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A vibration damper with adjustable damping speed includes a cylinder and a piston rod that are movably connected; a piston installed at one end of the piston rod near the cylinder and slidably connected to the inner wall of the cylinder; a support rod installed inside the cylinder at one end away from the piston rod and having a hollow internal structure; a connecting rod installed inside the support rod and passing through the cylinder at one end away from the piston rod; and a control valve installed at the end of the support rod near the piston rod and controlled by the rotation of the connecting rod.

[0006] The control valve includes a partition plate installed at one end of the support rod near the piston rod, a pressure plate installed at one end of the partition plate near the piston rod, and a control hole block installed between the partition plate and the pressure plate and slidably connected to the pressure plate;

[0007] A lever and a pointer are fixedly provided at one end of the connecting rod located outside the cylinder body. The lever and the pointer are mounted on a connecting block, which is mounted at the end of the connecting rod away from the piston rod. The connecting block is rotatably connected to the cylinder body.

[0008] As a preferred embodiment of the present invention, the control valve further includes a control wheel installed at one end of the connecting rod near the piston rod and located between the partition plate and the pressure plate for controlling the movement of the control hole block, and a throttling orifice penetrating through and disposed on the partition plate and whose size is controlled by the control hole block.

[0009] As a preferred embodiment of this invention, the cylinder body has a movable groove on the side away from the piston rod, the lever and the pointer are respectively located in the movable groove, and the cylinder body has a scale corresponding to the pointer.

[0010] As a preferred embodiment of this utility model, the cylinder body and the piston rod are respectively fixed with shaft connector one and shaft connector two at their ends that are far apart from each other. The cylinder body, the piston rod and the piston cooperate to form a working chamber, which is divided into a high-pressure nitrogen chamber and a hydraulic oil chamber by the control valve. The high-pressure nitrogen chamber is filled with high-pressure nitrogen, and the hydraulic oil chamber is filled with hydraulic oil. The cylinder body is provided with an inflation check valve at the end far away from the piston rod that communicates with the high-pressure nitrogen chamber. A plug screw is installed on one side of the inflation check valve.

[0011] As a preferred embodiment of this utility model, the end of the support rod away from the piston rod is provided with a sealing ring I located between the connecting rod and the cylinder body; the periphery of the piston is provided with a friction-reducing ring I that contacts the inner wall of the cylinder body; a guide seat is installed at the end of the cylinder body away from the shaft connector I; the piston is located on the side of the guide seat away from the shaft connector I; and the piston rod passes through the guide seat. A second sealing ring, a retaining ring, and a dustproof ring I are provided between the guide seat and the inner wall of the cylinder body; and a third sealing ring, a second friction-reducing ring, a fourth sealing ring, and a second dustproof ring are provided between the guide seat and the piston rod.

[0012] As a preferred embodiment of this utility model, a sealing ring five is provided between the connecting rod and the partition plate, a sealing ring six is ​​provided between the partition plate and the inner wall of the cylinder, and a fixing screw for connecting the partition plate and the pressure plate is installed on one side of the pressure plate.

[0013] As a preferred embodiment of this invention, the control valve further includes a control spring located between the partition plate and the pressure plate, with both ends of the control spring connected to the control hole block and the side wall of the partition plate, respectively, and the control wheel being a cam.

[0014] The beneficial effects of this utility model are as follows: As a vibration damper with adjustable damping speed, this utility model can pre-design the force and compression or elongation amplitude range of the vibration damper with adjustable damping speed according to the weight of the carrier and the amplitude under the working conditions, so as to adjust to the most ideal value and make the amplitude as small as possible. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0017] Figure 2 This is a utility model Figure 1 A top view of the lever section;

[0018] Figure 3 This is a utility model Figure 1A schematic diagram of the structure of a shaft connector;

[0019] Figure 4 This is a utility model Figure 1 A schematic diagram of the structure of the shaft connector 2 part;

[0020] Figure 5 This is a utility model Figure 1 A schematic diagram of the control valve structure;

[0021] Figure 6 This is a schematic diagram of the control valve structure in Embodiment 2 of this utility model;

[0022] Figure 7 This is a utility model Figure 6 A schematic diagram of the cross-sectional structure;

[0023] Figure 8 This is a utility model Figure 6 A schematic diagram of the exploded structure;

[0024] Figure 9 This is a cross-sectional view of the control valve in Embodiment 3 of this utility model;

[0025] Figure 10 This is a utility model Figure 9 A schematic diagram of the exploded structure;

[0026] Figure 11 This is a utility model Figure 10 A magnified structural diagram at point A. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0028] Example 1

[0029] Combination Figures 1-5An adjustable vibration damper includes a cylinder 19 and a piston rod 16 connected in a movable manner; a piston 15 installed on the piston rod 16 near the cylinder 19 and slidably connected to the inner wall of the cylinder 19; a support rod 20 installed inside the cylinder 19 and away from the piston rod 16, with a hollow internal structure; a connecting rod 21 installed inside the support rod 20 and passing through the cylinder 19 away from the piston rod 16; and a control valve 14 installed on the support rod 20 near the piston rod 16 and controlled by the rotation of the connecting rod 21. The adjustable vibration damper's force and compression or elongation amplitude range can be pre-designed according to the weight of the carrier and the amplitude under operating conditions, thereby adjusting to the most ideal value and minimizing the amplitude.

[0030] The control valve 14 includes a partition plate 37 installed on one end of the support rod 20 near the piston rod 16, a pressure plate 41 installed on one end of the partition plate 37 near the piston rod 16, a control orifice block 38 installed between the partition plate 37 and the pressure plate 41 and slidably connected to the pressure plate 41, a control wheel 42 installed on one end of the connecting rod 21 near the piston rod 16 and located between the partition plate 37 and the pressure plate 41 for controlling the movement of the control orifice block 38, and a throttling orifice 39 penetrating and disposed on the partition plate 37 and whose size is controlled by the control orifice block 38. The rotation of the connecting rod 21 is output as movement of the control orifice block 38 through a transmission structure. By controlling the degree of overlap between the control orifice block 38 and the throttling orifice 39, the size of the throttling orifice 39 is changed.

[0031] Advantageously, a lever 12 and a pointer 26 are fixedly mounted on one end of the connecting rod 21 located outside the cylinder body 19. The lever 12 and the pointer 26 are mounted on a connecting block 17, which is mounted on the end of the connecting rod 21 away from the piston rod 16. The cylinder body 19 has a movable groove 24 on the side away from the piston rod 16, and the lever 12 and the pointer 26 are respectively located in the movable groove 24. The cylinder body 19 has a scale 25 corresponding to the pointer 26. The lever 12 and the pointer 26 are integrally formed, and the connecting block 17 rotates within the gap between the cylinder body 13 and the shaft connector 11.

[0032] Advantageously, the cylinder body 19 and the piston rod 16 are respectively fixed with shaft connector 11 and shaft connector 23 at their respective ends. The cylinder body 19, piston rod 16 and piston 15 cooperate to form a working chamber, which is divided into a high-pressure nitrogen chamber 13 and a hydraulic oil chamber 22 by the control valve 14. The high-pressure nitrogen chamber 13 is filled with high-pressure nitrogen, and the hydraulic oil chamber 22 is filled with hydraulic oil. The end of the cylinder body 19 away from the piston rod 16 is provided with a one-way inflation valve 18 communicating with the high-pressure nitrogen chamber 13. A plug screw 27 is installed on one side of the one-way inflation valve 18. During vibration damping, the high-pressure nitrogen is compressed or expanded, and the hydraulic oil enters the high-pressure nitrogen chamber 13 or flows back to the hydraulic oil chamber 22 through the throttle orifice 39.

[0033] Advantageously, the support rod 20 has a sealing ring 28 located between the connecting rod 21 and the cylinder 19 at one end away from the piston rod 16; the piston 15 has a friction-reducing ring 29 on its circumference that contacts the inner wall of the cylinder 19; a guide seat 60 is mounted on one end of the cylinder 19 away from the shaft connector 11; the piston 15 is located on the side of the guide seat 60 away from the shaft connector 11; and the piston rod 16 passes through the guide seat 60. The guide seat 60 and the... A second sealing ring 30, a retaining ring 31, and a first dustproof ring 32 are provided between the inner walls of the cylinder body 19. A third sealing ring 33, a second anti-friction ring 34, a fourth sealing ring 35, and a second dustproof ring 36 are provided between the guide seat 60 and the piston rod 16. A fifth sealing ring 43 is provided between the connecting rod 21 and the partition plate 37, and a sixth sealing ring 44 is provided between the partition plate 37 and the inner wall of the cylinder body 19. A fixing screw 45 for connecting the partition plate 37 and the pressure plate 41 is installed on one side of the pressure plate 41. The partition plate 37 is a stepped cylindrical shape with a hollow internal structure. A placement space is formed between the pressure plate 41 and the partition plate 37 for installing the control hole block 38.

[0034] Advantageously, the control valve 14 also includes a control spring 40 located between the partition plate 37 and the pressure plate 41. The two ends of the control spring 40 are connected to the control hole block 38 and the side wall of the partition plate 37, respectively. The control wheel 42 is a cam. The cam-structured control wheel 42 has a wide-pitch side and a narrow-pitch side, and the control spring 40 ensures that the control hole block 38 remains in contact with the connecting rod 21.

[0035] Example 2

[0036] Combination Figures 1-8Unlike the first embodiment described above, the control wheel 42 has an arc-shaped groove 59, and the pressure plate 41 has a sliding groove 48 on the side near the connecting rod 21. The pressure plate 41 has a through hole 46 and a through hole 47 corresponding to the fixing screw 45 and the throttling hole 39, respectively. The control hole block 38 includes a control post 49 that cooperates with the arc-shaped groove 59, a connecting plate 52 fixedly connected to one end of the control post 49, a guide rod 50 fixedly connected to the control post 49 and slidingly cooperating with the sliding groove 48, and a control hole plate 51 installed on the side of the connecting plate 52 away from the connecting rod 21. The control wheel 42 is a circular wheel with arc-shaped grooves 59 at unequal distances from its end to the axis of the control wheel. The arc-shaped grooves 59 drive the control hole block 38 to move, which is equivalent to combining the outer edge cam and the inner ring cam. The reset movement of the control hole block 38 no longer relies on the control spring 40. The forward and reverse movement of the control hole block 38 is completed through the arc-shaped grooves 59, resulting in more precise adjustment.

[0037] Example 3

[0038] Combined with appendix Figure 1-11 Unlike Embodiment 2 described above, the control plate 51 has a mounting groove 54 on the side near the connecting plate 52. A buffer spring 53 is installed within the mounting groove 54, with both ends of the buffer spring 53 connected to the connecting plate 52 and the control plate 51 respectively. The connecting plate 52 and the mounting groove 54 are slidably connected. The buffer spring 53 has a mis-touch function. Although the forward and reverse movement of the control block 38 still relies on the arc-shaped groove 59, the movement of the connecting plate 52 is not directly transmitted to the control plate 51, but rather through the buffer spring 53. The buffer spring 53 can filter out rotation caused by mis-touch, including rotation of the pointer 26 during adjustment when it is not within a full scale unit, and spontaneous rotation of the pointer 26 caused by carrier vibration during adjustment or actual operation.

[0039] Advantageously, the control plate 51 is provided with limiting grooves 58 located on both sides of the connecting plate 52. Each limiting groove 58 has a limiting block 57 on one side. Each limiting block 57 has a limiting rod 56 fixedly installed at the end away from the control plate 51. The two limiting rods 56 are slidably connected to the inner wall of the partition plate 37. A limiting spring 55 is provided around the periphery of the limiting rod 56. The two ends of the limiting spring 55 are respectively connected to the inner wall of the partition plate 37 and the limiting block 57. The limiting grooves 58 and the limiting blocks 57 are designed to increase friction, and are preferably shallow wavy grooves. When the wavy grooves between the two engage, the movement of the connecting plate 52 does not drive the control plate 51 to move. When the buffer spring 53 is compressed or stretched to a certain extent, the wavy grooves can hardly maintain engagement, thereby causing 57 to move away from 58, 55 to be compressed, and 56 and 57 to retract together into the inner wall of the partition plate 37 by a certain length.

[0040] A method for adjusting a vibration damper with adjustable damping speed includes the following steps:

[0041] S1. Install the vibration damper; install the vibration damper with adjustable damping speed on the vibration simulation table, and connect the shaft connector 11 and the shaft connector 23 to the simulation carrier and the simulation body respectively;

[0042] S2. Simulate vibration; use the vibration simulation table to simulate the vibration of the adjustable vibration damper under actual working conditions, including amplitude, period and velocity.

[0043] S3. Feedback data: The vibration simulation table records and feeds back the working parameters of the adjustable vibration damper to the database to obtain simulation parameters, which are then compared with the set parameters.

[0044] S4. Adjust the vibration reduction speed; if the simulated parameters do not meet the range requirements of the set parameters, compensate by changing the size of the throttle orifice 39 by moving the lever 12; repeat step S3 until the simulated parameters meet the range requirements of the set parameters.

[0045] Advantageously, in step S3, the simulation parameters include the damper's force, compression amplitude, and elongation amplitude.

[0046] The adjustment principle of this utility model is as follows:

[0047] refer to Figures 1-5 In the first embodiment, in the initial state, the two control hole blocks 38 will remain in contact with the side of the control wheel 42 under the action of the control spring 40;

[0048] By moving lever 12, pointer 26 rotates with lever 12. The desired position is found through scale 25. Link 21 and control wheel 42 rotate with lever 12. After the wide side of control wheel 42 contacts control hole block 38, it forces control hole block 38 away from the axis of link 21. The two control hole blocks 38 slide to the sides respectively, and control spring 40 is compressed. When the narrow side of control wheel 42 contacts control hole block 38, control spring 40 extends. Control spring 40 causes 3 to slide, and the control hole blocks 38 on both sides move closer to the center, approaching the axis of link 21.

[0049] As the control block 38 moves, the overlap between the control block 38 and the throttle orifice 39 increases or decreases, thereby adjusting the size of the throttle orifice 39, thus controlling the hydraulic oil flow rate and speed, so as to counteract the energy generated when the carrier vibrates, making them tend to be balanced, and can be adjusted to have an amplitude close to 0, achieving the most ideal environment.

[0050] refer to Figures 6-8In the second embodiment, the adjustment process differs from that in the first embodiment. After the connecting rod 21 and the control wheel 42 rotate, they are limited by the slide groove 48 and the guide rod 50. The control wheel 42 drives the control column 49 to slide in the arc groove 59. The control column 49, the guide rod 50, the control plate 51 and the connecting plate 52 move together as a whole. By reversing the connecting rod 21, the control plate 51 is brought closer to or away from the axis of the connecting rod 21, thereby achieving the purpose of adjusting the size of the throttling orifice 39.

[0051] refer to Figures 9-11 In the third embodiment, the adjustment process differs from that in the second embodiment. If the rotation angle of the connecting rod 21 is small, after the control wheel 42 drives the control column 49 to slide in the arc groove 59, only the control column 49, the guide rod 50, and the connecting plate 52 move together as a whole. The control hole plate 51 does not move under the limiting effect of the limiting block 57 and the limiting groove 58. The connecting plate 52 and the mounting groove 54 slide. The buffer spring 53 is compressed or stretched. When the force applied to the lever 12 is removed, the lever 12, the pointer 26, the connecting rod 21, and the control wheel 42 are forced to rotate back under the action of the buffer spring 53, returning to the state before adjustment.

[0052] When the rotation angle of the connecting rod 21 is large enough, after the above-mentioned small-angle rotation process, the connecting plate 52 continues to move, and the buffer spring 53 is further compressed or stretched. When the buffer spring 53 can no longer be further compressed or stretched, the control plate 51 moves against the elastic force of the limit spring 55: the limit rod 56 slides against the inner wall of the partition plate 37, the limit spring 55 is compressed, the limit block 57 is forced to lift, and the limit groove 58 and the limit block 57 slip. At the moment of slippage, the buffer spring 53 is released and returns to the normal state. The buffer spring 53 pushes the control plate 51 to move relative to the connecting plate 52. The movement of the control plate 51 achieves the purpose of adjusting the size of the throttling orifice 39. When the control plate 51 is in place, the limit spring 55 resets, and the limit block 57 and the limit groove 58 re-fit.

[0053] During the above process, the buffer spring 53 only contacts the connecting plate 52 and the control plate 51 at its end, while the limiting spring 55 contacts the limiting rod 56 inside. Furthermore, there is friction between the limiting rod 56 and the inner wall of the partition plate 37. Therefore, the rebound speed of the buffer spring 53 is much greater than that of the limiting spring 55. As long as the limiting block 57 and the limiting groove 58 lose their engagement, the buffer spring 53 will instantly return to its normal state. The continued movement of the connecting plate 52 will directly cause the control plate 51 to move a corresponding distance. During the adjustment process, as long as the rotation of the lever 12 is continuous, the size adjustment of the throttling orifice 39 can be completed in one go.

[0054] In the non-adjustment process, that is, in the simulation process or actual working process of the vibration damper with adjustable damping speed, the same principle as in the above embodiment 3 is applied. Even if the vibration of the carrier causes the lever 12 to rotate autonomously, it will not interfere with the size of the throttling orifice 39.

[0055] 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 way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A vibration damper with adjustable damping speed, characterized in that: The device includes a cylinder and a piston rod that are movably connected; a piston installed at one end of the piston rod near the cylinder and slidably connected to the inner wall of the cylinder; a support rod installed inside the cylinder at one end away from the piston rod and having a hollow internal structure; a connecting rod installed inside the support rod and passing through the cylinder at one end away from the piston rod; and a control valve installed at one end of the support rod near the piston rod and controlled by the rotation of the connecting rod. The control valve includes a partition plate installed at one end of the support rod near the piston rod, a pressure plate installed at one end of the partition plate near the piston rod, and a control hole block installed between the partition plate and the pressure plate and slidably connected to the pressure plate; A lever and a pointer are fixedly provided at one end of the connecting rod located outside the cylinder body. The lever and the pointer are mounted on a connecting block, which is mounted at the end of the connecting rod away from the piston rod. The connecting block is rotatably connected to the cylinder body.

2. The vibration damper with adjustable damping speed according to claim 1, characterized in that: The control valve also includes a control wheel installed at one end of the connecting rod near the piston rod and located between the partition plate and the pressure plate for controlling the movement of the control hole block, and a throttling orifice passing through and disposed on the partition plate and whose size is controlled by the control hole block.

3. A vibration damper with adjustable damping speed according to claim 2, characterized in that: The cylinder body has a movable groove on the side away from the piston rod, the lever and the pointer are respectively located in the movable groove, and the cylinder body has a scale corresponding to the pointer.

4. A vibration damper with adjustable damping speed according to claim 3, characterized in that: The cylinder body and the piston rod are respectively fixed with shaft connector one and shaft connector two at their respective ends. The cylinder body, the piston rod and the piston cooperate to form a working chamber, which is divided into a high-pressure nitrogen chamber and a hydraulic oil chamber by the control valve. The high-pressure nitrogen chamber is filled with high-pressure nitrogen, and the hydraulic oil chamber is filled with hydraulic oil. The cylinder body is provided with an inflation check valve at the end away from the piston rod, which communicates with the high-pressure nitrogen chamber. A plug screw is installed on one side of the inflation check valve.

5. A vibration damper with adjustable damping speed according to claim 4, characterized in that: The support rod has a sealing ring 1 located between the connecting rod and the cylinder at the end away from the piston rod. The piston has a friction-reducing ring 1 that contacts the inner wall of the cylinder at its circumference. A guide seat is installed at the end of the cylinder away from the shaft connector 1. The piston is located on the side of the guide seat away from the shaft connector 1. The piston rod passes through the guide seat. A sealing ring 2, a retaining ring, and a dustproof ring 1 are provided between the guide seat and the inner wall of the cylinder. A sealing ring 3, a friction-reducing ring 2, a sealing ring 4, and a dustproof ring 2 are provided between the guide seat and the piston rod.

6. A vibration damper with adjustable damping speed according to claim 5, characterized in that: A sealing ring five is provided between the connecting rod and the partition plate, and a sealing ring six is ​​provided between the partition plate and the inner wall of the cylinder. A fixing screw for connecting the partition plate and the pressure plate is installed on one side of the pressure plate.

7. A vibration damper with adjustable damping speed according to claim 6, characterized in that: The control valve also includes a control spring located between the partition plate and the pressure plate. The two ends of the control spring are respectively connected to the control hole block and the side wall of the partition plate. The control wheel is a cam.

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