A high-low speed independently adjustable compression damping mechanism

Abstract

The application relates to the field of shock absorbers, and discloses a high-low-speed independently adjustable compression damping mechanism, which comprises an adjuster body, an oil passage inlet for connecting an oil passage is arranged on one side of the adjuster body, a high-speed adjustable oil passage and a low-speed adjustable oil passage which are independent of each other are connected in parallel downstream of the oil passage inlet, an elastic valve plate with adjustable pre-tightening force is arranged on an oil outlet end of the high-speed adjustable oil passage, so as to change the damping opening degree of the high-speed adjustable oil passage, an adjusting hollow rod is rotatably arranged in the adjuster body, and the low-speed adjustable oil passage penetrates through the inside of the rod body of the adjusting hollow rod in a horizontal direction; the application adopts the design of nested coaxial independent adjustment, the high-speed adjustment only changes the pre-tightening force of the elastic valve plate, the low-speed adjustment only changes the flow area of a low-speed throttling port, the two adjustment paths do not interfere with each other in the whole process, and the problem of high-low-speed damping parameter coupling interference in the same compression stroke is effectively solved from the mechanical principle level.

Description

Technical Field

[0001] This application relates to the field of shock absorbers, and more particularly to a compression damping mechanism that is independently adjustable for high and low speeds. Background Technology

[0002] Shock absorbers are the core damping components in a car's suspension system, operating in parallel with the springs. They don't support the vehicle body; their primary function is to suppress the repeated bouncing after the springs absorb shocks. They convert the mechanical energy of road impacts into heat through fluid friction, quickly calming residual vibrations and ensuring smooth, comfortable daily driving while maintaining wheel contact with the road surface, significantly improving handling safety. Most modern shock absorbers feature high- and low-speed adjustment mechanisms to assist in damping control. This system, relying on valves and hydraulic lines, allows fluid to flow through fixed throttling orifices at low speeds, generating gentle basic damping to filter out minor bumps. At high speeds, high-pressure fluid pushes open dedicated high-speed valves, creating a high-flow channel to quickly establish high damping force. The damping characteristics at high and low speeds can be independently adjusted by changing the number, thickness, and preload of the valves, perfectly balancing daily driving comfort with strong body support under demanding conditions.

[0003] Regarding the aforementioned technologies, the inventors believe that current dual-oil-circuit shock absorber solutions in the industry generally retain a rigid mechanical linkage structure between the high-speed and low-speed adjustment mechanisms. When adjusting the damping of one circuit, the preload or throttling opening of the other circuit valve system will indirectly shift through the linkage transmission components, making it impossible to achieve decoupled control of the high-speed and low-speed damping parameters. A few products with independently adjustable dual valves can only achieve separate damping control for the two different motion directions of the compression and recovery strokes, without creating dedicated parallel flow channels for the high-speed and low-speed flow conditions within the same compression stroke. This fails to effectively solve the problem of damping parameter coupling interference under different oil flow rates within the same stroke.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0005] To address the problem of mutual interference during adjustment of dual oil circuits in current shock absorbers, this application provides a compression damping mechanism that is independently adjustable for high and low speeds.

[0006] The high- and low-speed independently adjustable compression damping mechanism provided in this application adopts the following technical solution: A compression damping mechanism with independent high and low speed adjustment includes an regulator body. An oil inlet is provided on one side of the regulator body, and a high-speed adjustable oil circuit and a low-speed adjustable oil circuit are connected in parallel downstream of the oil inlet. The oil outlet end of the high-speed adjustable oil circuit is covered with an elastic valve plate with adjustable preload to change the damping opening of the high-speed adjustable oil circuit. The regulator body has an adjustable hollow rod rotatably mounted inside. The low-speed adjustable oil circuit is laterally opened inside the rod body of the adjustable hollow rod, and the oil outlet of the low-speed adjustable oil circuit is connected to a low-speed throttling port arranged coaxially with the adjustable hollow rod. The regulator body is provided with a low-speed regulating valve core that can slide along the axis of the regulator body. One end of the low-speed regulating valve core can extend into the low-speed throttling port to change the throttling diameter of the low-speed adjustable oil circuit.

[0007] Preferably, a compression frame is threaded onto the outer wall of the adjusting hollow rod, the top end of the compression frame abuts against one side end face of the elastic valve plate, and the compression frame moves along the axis of the regulator body to change the preload of the elastic valve plate.

[0008] Preferably, a limiting rod is fixedly installed on the surface of the compression frame, and a sliding groove is provided on the inner wall of the adjuster body for sliding engagement of the limiting rod, so as to achieve circumferential limiting of the compression frame.

[0009] Preferably, the high-speed adjustable oil circuit consists of at least two independent oil passages that are circumferentially spaced and pass through the inner wall of the regulator body.

[0010] Preferably, a high-speed adjustment knob is fixedly sleeved on the top of the hollow adjustment rod, and a low-speed adjustment knob is fixedly installed on the top of the low-speed adjustment valve core. The bottom end face of the low-speed adjustment knob is rotatably engaged with the top end face of the high-speed adjustment knob, and the rotation axis of the low-speed adjustment knob is on the same straight line as the axis of the hollow adjustment rod.

[0011] Preferably, the top end face of the regulator body and the side wall of the low-speed regulating valve core are provided with mounting grooves, and steel balls and springs are placed inside the mounting grooves. The inner wall of the regulating hollow rod and the bottom end face of the high-speed regulating knob are respectively provided with several sets of evenly distributed positioning grooves. The steel balls can be inserted into the corresponding positioning grooves to position the rotation.

[0012] Preferably, an oil seal is embedded in the top port of the regulator body. The inner ring of the oil seal is attached to the outer wall surface of the low-speed regulating valve core to cover the mating gap between the low-speed regulating valve core and the regulator body. When the low-speed regulating valve core moves up and down, it prevents external dust and impurities from entering the oil circuit and prevents internal oil from leaking out.

[0013] Preferably, a sealing ring is fixedly installed between the bottom periphery of the high-speed adjustment knob and the regulator body.

[0014] In summary, this application includes the following beneficial technical effects: By adopting a nested coaxial independent adjustment design, high-speed adjustment only changes the preload of the elastic valve plate, and low-speed adjustment only changes the flow area of ​​the low-speed throttling orifice. The two adjustments do not interfere with each other throughout the entire process, effectively solving the problem of coupling interference between high and low speed damping parameters within the same compression stroke from the mechanical principle level. During the adjustment process, there will be no situation where the parameters of the other path deviate when adjusting one path of damping. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a compression damping mechanism with independent high and low speed adjustment according to an embodiment of the application. Figure 2 This is a schematic diagram of the adjusting hollow rod structure according to an embodiment of the application; Figure 3 This is a partial structural diagram of an embodiment of the application; Figure 4 This is a schematic diagram of the compression frame structure according to an embodiment of the application; Figure 5 This is a top view of the structure of an embodiment of the application.

[0016] Explanation of reference numerals in the attached diagram: 1. Regulator body; 2. Oil inlet; 3. High-speed adjustable oil circuit; 4. Elastic valve plate; 5. Compression frame; 51. Limit rod; 52. Slide groove; 6. Adjusting hollow rod; 7. High-speed adjustment knob; 8. Sealing ring; 9. Low-speed adjustment knob; 10. Low-speed adjustment valve core; 11. Low-speed adjustable oil circuit; 12. Oil seal; 13. Steel ball; 14. Spring; 15. Low-speed throttling port. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0018] This application discloses a high- and low-speed independently adjustable compression damping mechanism that can be directly integrated into the compression valve seat of automotive coilover suspension, electric two-wheeler off-road fork, and industrial equipment damping buffer unit. It does not require significant modifications to the original shock absorber outer cylinder and inner oil pipe structure and is compatible with the installation space of most mainstream double-tube and single-tube damping systems.

[0019] refer to Figure 1 - Figure 2 The mechanism includes a regulator body 1. An oil inlet 2 is provided on one side of the regulator body 1 to access the oil circuit. Downstream of the oil inlet 2, there are two independent high-speed adjustable oil circuits 3 and low-speed adjustable oil circuits 11. The two oil circuits are completely independent. The flow channel design effectively avoids mutual interference during the oil diversion stage and will not cause the problem of hidden cross-flow interference damping parameters between the two oil circuits.

[0020] The oil outlet of the high-speed adjustable oil circuit 3 is covered with an elastic valve plate 4 with adjustable preload. By changing the preload of the elastic valve plate 4, the damping opening of the high-speed adjustable oil circuit 3 can be changed, thereby achieving continuous linear adjustment of high-speed damping.

[0021] An adjusting hollow rod 6 is rotatably mounted inside the regulator body 1, and a low-speed adjustable oil passage 11 is laterally opened through the inside of the adjusting hollow rod 6. To ensure that the low-speed adjustable oil passage 11 remains connected to the oil passage inlet 2 during the rotation of the adjusting hollow rod 6, an annular guide groove is provided on the outer wall of the adjusting hollow rod 6 at the inlet end of the low-speed adjustable oil passage 11. The annular guide groove extends circumferentially along the adjusting hollow rod 6, allowing the downstream oil from the oil passage inlet 2 to enter the low-speed adjustable oil passage 11 through the annular guide groove. No matter what angle the adjusting hollow rod 6 rotates to, the oil inlet channel of the low-speed oil passage will not be cut off. The oil outlet end of the low-speed adjustable oil passage 11 is connected to a low-speed throttling port 15 arranged coaxially with the adjusting hollow rod 6. The centrally arranged coaxial flow channel ensures the symmetry of the low-speed oil flow and avoids the lateral force generated by the eccentric flow channel from causing the valve core to wear and stick. The regulator body 1 is equipped with a low-speed regulating valve core 10 that can slide along the axis of the regulator body 1. One end of the low-speed regulating valve core 10 can extend into the low-speed throttle port 15. By changing the depth of the low-speed regulating valve core 10 extending into the low-speed throttle port 15, the throttle diameter of the low-speed adjustable oil circuit 11 can be precisely changed, so as to achieve independent adjustment of low-speed damping. The parameters of the high-speed oil circuit will not be interfered with at all.

[0022] Specifically, refer to Figure 4 A compression frame 5 is threaded onto the outer wall of the adjusting hollow rod 6. The compression frame 5 slides against the inner wall of the regulator body 1, and the top of the compression frame 5 abuts against one side end face of the elastic valve plate 4. A limit rod 51 is fixedly installed on the surface of the compression frame 5. A groove 52 is provided on the inner wall of the regulator body 1 for the limit rod 51 to slide against. The limit rod 51 is embedded in the groove 52, so that the compression frame 5 can only move along the axial direction of the regulator body 1 and cannot rotate with the adjusting hollow rod 6. When the adjusting hollow rod 6 rotates, the compression frame 5 is constrained in the circumferential direction. The threaded transmission converts the rotational motion of the adjusting hollow rod 6 into the axial linear movement of the compression frame 5 along the inner wall of the regulator body 1. The axial movement of the compression frame 5 precisely changes the compression degree of the elastic valve plate 4 without any jamming or offset, ensuring the long-term stability of the preload adjustment accuracy of the elastic valve plate 4.

[0023] refer to Figure 2 - Figure 5The high-speed adjustable oil passage 3 consists of at least two independent oil channels spaced circumferentially and extending through the inner wall of the regulator body 1. The inlet ends of all high-speed adjustable oil passages 3 are connected to the downstream side of the oil passage inlet 2. This circumferentially evenly distributed multi-channel design allows for uniform oil flow under high-speed impact conditions, avoiding cavitation and cavitation problems caused by excessively high local flow velocities in a single oil passage, and significantly extending the fatigue life of the valve assembly. The oil passage inlet 2 adopts a radially opened flow channel design, which minimizes the flow path of the oil into the valve assembly and avoids the additional friction resistance generated by long flow channels interfering with the accuracy of the damping parameters.

[0024] A high-speed adjustment knob 7 is fixedly fitted on the top of the hollow adjustment rod 6, and a low-speed adjustment knob 9 is fixedly installed on the top of the low-speed adjustment valve core 10. The bottom end face of the low-speed adjustment knob 9 rotates and fits in contact with the top end face of the high-speed adjustment knob 7, and the rotation axis of the low-speed adjustment knob 9 is on the same straight line as the axis of the hollow adjustment rod 6. This nested coaxial arrangement structure isolates the two adjustment actions from each other. When the high-speed adjustment knob 7 is rotated, it can only drive the hollow adjustment rod 6 to rotate synchronously, driving the external compression frame 5 to move up and down axially. It will not cause any positional displacement of the internal low-speed adjustment valve core 10 throughout the entire process. When the low-speed adjustment knob 9 is rotated alone, it can only drive the low-speed adjustment valve core 10 to move axially along the axis of the regulator body 1. It will not affect the position of the hollow adjustment rod 6, the compression frame 5, and the elastic valve plate 4. This achieves decoupling of high and low speed adjustment from a mechanical structure level.

[0025] The top end face of the regulator body 1 and the side wall of the low-speed regulating valve core 10 are both provided with mounting grooves. The inside of the mounting grooves is filled with steel balls 13 and springs 14. The inner wall of the regulating hollow rod 6 and the bottom end face of the high-speed regulating knob 7 are respectively provided with several sets of evenly distributed positioning grooves. The steel balls 13 can be inserted into the corresponding positioning grooves under the pre-compression force of the springs 14. Each time the gear is rotated, the steel balls 13 fall into the next groove, realizing gear positioning. This effectively prevents the regulating hollow rod 6 and the low-speed regulating valve core 10 from interfering with each other, and avoids the problems of gear offset and parameter drift during the adjustment process.

[0026] An oil seal 12 is embedded in the top port of the regulator body 1. The inner ring of the oil seal 12 is attached to the outer wall of the low-speed regulating valve core 10 to cover the mating gap between the low-speed regulating valve core 10 and the regulator body 1. When the low-speed regulating valve core 10 moves up and down, it prevents external dust and impurities from entering the oil circuit and prevents internal oil from leaking out. It can still work stably for a long time in dusty off-road and industrial conditions, greatly extending the maintenance-free cycle of the valve group.

[0027] A sealing ring 8 is fixedly installed between the bottom periphery of the high-speed adjustment knob 7 and the regulator body 1. The sealing ring 8 fills the connection gap between the high-speed adjustment knob 7 and the regulator body 1 to prevent external impurities from entering the fitting gap and causing the knob to get stuck. At the same time, it provides appropriate rotational damping to prevent the knob from being loosened and displaced by high-frequency vibration during vehicle operation, and ensures that the adjustment parameters remain stable over a long period of time.

[0028] The complete working process of this embodiment is as follows: When the shock absorber enters the compression stroke, the high-pressure damping oil enters the valve body's internal flow division area from the oil circuit inlet 2 and automatically splits into two independent flows. Under low-speed conditions, the oil pressure is insufficient to open the elastic valve plate 4, the high-speed oil circuit is in a closed state, and all oil flows through the low-speed oil circuit. The damping characteristics are entirely determined by the cooperation between the low-speed regulating valve core 10 and the low-speed throttle port 15. Under high-speed impact conditions, the oil flow rate increases sharply, and the high-pressure oil directly opens the elastic valve plate 4 and flows out from the outlet of the high-speed adjustable oil circuit 3, completing the high-speed damping establishment process. Rotating the high-speed adjustment knob 7 gradually changes the preload of the elastic valve plate 4, linearly adjusting the high-speed damping force; rotating the low-speed adjustment knob 9 changes the depth of the low-speed adjustment valve core 10 into the low-speed throttle port 15, independently adjusting the low-speed damping force. The two damping paths are linearly superimposed, thus overcoming the defects of synchronous high and low speed damping changes and parameter coupling interference in traditional single-oil circuit shock absorbers. Users can freely combine parameters according to different scenarios to adapt to the usage needs of all scenarios from urban commuting to professional off-roading.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A compression damping mechanism with independent high and low speed adjustment, comprising an adjuster body (1), characterized in that: The regulator body (1) has an oil inlet (2) on one side that connects to the oil circuit. Downstream of the oil inlet (2) are connected to an independent high-speed adjustable oil circuit (3) and a low-speed adjustable oil circuit (11). The oil outlet end of the high-speed adjustable oil circuit (3) is covered with an elastic valve plate (4) with adjustable preload to change the damping opening of the high-speed adjustable oil circuit (3). The regulator body (1) is rotatably mounted with an adjusting hollow rod (6). The low-speed adjustable oil passage (11) is transversely opened inside the rod body of the adjusting hollow rod (6), and the oil outlet of the low-speed adjustable oil passage (11) is connected to a low-speed throttle port (15) arranged coaxially with the adjusting hollow rod (6). The regulator body (1) is provided with a low-speed regulating valve core (10) that can slide along the axis of the regulator body (1). One end of the low-speed regulating valve core (10) can extend into the low-speed throttle port (15) to change the throttle diameter of the low-speed adjustable oil circuit (11).

2. The compression damping mechanism with independent high and low speed adjustment according to claim 1, characterized in that: The outer wall of the adjusting hollow rod (6) is threaded with a compression frame (5). The top of the compression frame (5) abuts against one side end face of the elastic valve plate (4), and the compression frame (5) moves along the axis of the regulator body (1) to change the preload of the elastic valve plate (4).

3. The compression damping mechanism with independent high and low speed adjustment according to claim 2, characterized in that: A limiting rod (51) is fixedly installed on the surface of the compression frame (5), and a sliding groove (52) is provided on the inner wall of the regulator body (1) for the limiting rod (51) to slide and engage, so as to achieve circumferential limiting of the compression frame (5).

4. The compression damping mechanism with independent high and low speed adjustment according to claim 1, characterized in that: The high-speed adjustable oil circuit (3) consists of at least two independent oil passages that are spaced apart along the circumference and pass through the inner wall of the regulator body (1).

5. The compression damping mechanism with independent high and low speed adjustment according to claim 1, characterized in that: The top of the hollow adjusting rod (6) is fixedly fitted with a high-speed adjusting knob (7), and the top of the low-speed adjusting valve core (10) is fixedly fitted with a low-speed adjusting knob (9). The bottom end face of the low-speed adjusting knob (9) is rotated and fitted with the top end face of the high-speed adjusting knob (7), and the rotation axis of the low-speed adjusting knob (9) is on the same straight line as the axis of the hollow adjusting rod (6).

6. The compression damping mechanism with independent high and low speed adjustment according to claim 5, characterized in that: The top end face of the regulator body (1) and the side wall of the low-speed regulating valve core (10) are provided with mounting grooves. Steel balls (13) and springs (14) are placed inside the mounting grooves. Several sets of evenly distributed positioning grooves are provided on the inner wall of the regulating hollow rod (6) and the bottom end face of the high-speed regulating knob (7). The steel balls (13) can be inserted into the corresponding positioning grooves to position the rotation.

7. The compression damping mechanism with independent high and low speed adjustment according to claim 1, characterized in that: An oil seal (12) is embedded in the top port of the regulator body (1). The inner ring of the oil seal (12) is attached to the outer wall of the low-speed regulating valve core (10) to cover the fit gap between the low-speed regulating valve core (10) and the regulator body (1). When the low-speed regulating valve core (10) moves up and down, it blocks external dust and impurities from entering the oil circuit and prevents internal oil from leaking out.

8. The compression damping mechanism with independent high and low speed adjustment according to claim 5, characterized in that: A sealing ring (8) is fixedly installed between the bottom periphery of the high-speed adjustment knob (7) and the regulator body (1).

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