A damper-adjustable low-noise shock absorber valve assembly

Abstract

The utility model relates to a low noise damper valve assembly with adjustable damping, including valve rod and the main valve of setting in the outer periphery of valve rod, the valve rod is located the oil inlet channel that is equipped with in main valve one side, be equipped with the push rod of being able to axial movement in the valve rod, the push rod is located the adjusting valve core that is equipped with in oil inlet channel one side, the fixed valve rod that the adjusting valve core end is connected has the oil outlet, the first control assembly that adjusting oil inlet channel size to change oil intake to control fluid noise is equipped with in the outer periphery of adjusting valve core, adjusting oil inlet channel size with the first control assembly of adjusting valve core outer periphery, realized the control of oil intake to change the cross section area of oil inlet channel to control the flow rate in flow channel, thereby effectively restrain the fluid noise that the multiple physical field coupling effect produces in the process of hydraulic oil flow.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper technology, specifically to a low-noise vibration damper valve assembly with adjustable damping. Background Technology

[0002] The shock absorber valve assembly is the core control unit of an automotive shock absorber. Through the coordinated action of a precisely designed valve plate combination and hydraulic circuit, it achieves dynamic adjustment of damping force. During the compression stroke, the valve assembly controls the flow of oil through the flow valve and compression valve, generating compression damping to slow down the piston's downward speed and suppress vehicle body drop. During the rebound stroke, the recovery valve and compensation valve work together to regulate the oil return rate, forming tensile resistance to limit excessive spring rebound. Its structure includes single-valve, dual-valve, and multi-valve systems. Among them, dual-valve technology significantly improves vehicle handling stability and optimizes comfort by independently controlling compression and rebound damping.

[0003] Publication number CN118705320A discloses a mechanically adjustable variable damping force vibration damper with an adjusting component, including a piston damping valve, an adjusting valve, a protective cover, a valve seat, and a double-sided piston. The bottom of the protective cover abuts against the piston damping valve. The valve seat is located inside the protective cover, with its bottom abutting against the inner wall of the protective cover and having a notch, and its top abutting against the double-sided piston. The double-sided piston is partially embedded in the opening of the protective cover, and its top abuts against a limiting step on the piston rod. The adjusting valve is located inside the piston rod and includes a valve core and a valve rod. The valve core has an A-hole, and correspondingly, the piston rod has a corresponding... The B through-hole, and both the A and B through-holes are located inside the valve seat; after installation, an external motor drives the regulating valve to rotate, aligning the through-hole on the valve core with the through-hole on the piston rod, thus connecting the fluid flow channel inside the valve core with the cavity inside the protective cover. Then, through the synergistic action of the piston damping valve and the double-sided piston, the damping force can be adjusted. During the dynamic interaction between the hydraulic oil and the valve body, due to the multi-physics coupling effect, the oil flow energy is converted into sound energy, which generates fluid noise. This technology cannot adjust the flow velocity in the flow channel while adjusting the damping size of the damping valve, thereby controlling the generation of fluid noise. Therefore, this technology still has some room for improvement. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a low-noise vibration damper valve assembly with adjustable damping, which addresses the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a damping adjustable low-noise vibration damper valve assembly, including a valve stem and a main valve disposed on the outer periphery of the valve stem. The valve stem has an oil inlet channel on one side of the main valve. The valve stem is characterized in that: a push rod capable of axial movement is disposed inside the valve stem, an adjusting valve core is disposed on one side of the push rod located in the oil inlet channel, a fixed valve stem for oil outlet is connected to the end of the adjusting valve core, and a first control component is disposed on the outer periphery of the adjusting valve core to adjust the size of the oil inlet channel to change the oil inlet volume and control fluid noise.

[0006] By adopting the above technical solution, an axially movable push rod is set inside the valve stem, and an adjusting valve core is installed on the side of the push rod located in the oil inlet channel. The size of the oil inlet channel is adjusted by the first control component on the outer periphery of the adjusting valve core, thereby realizing the control of the oil inlet volume. The push rod and adjusting valve core can adjust the damping force, and the cross-sectional area of ​​the oil inlet channel can be changed by the first control component to control the flow velocity in the flow channel, thereby effectively suppressing the fluid noise generated by the multi-physical field coupling effect during the hydraulic oil flow process.

[0007] The aforementioned damping adjustable low-noise shock absorber valve assembly can be further configured such that: the first control assembly includes a first adjusting block disposed on the outer periphery of the adjusting valve core, the outer periphery of the first adjusting block is provided with a first inclined surface, and the first inclined surface abuts against the oil inlet channel.

[0008] By adopting the above technical solution, the oil inlet volume can be adjusted through the inclined structure. When the regulating valve core moves axially, the contact position between the first inclined surface and the oil inlet channel changes, which can control the hydraulic oil flow rate in the flow channel, thereby suppressing fluid noise caused by sudden or excessive flow rate changes.

[0009] The aforementioned damping adjustable low-noise vibration damper valve assembly can be further configured as follows: the end of the regulating valve core is provided with a second control structure that adjusts the cross-sectional area between the regulating valve core and the fixed valve stem to control the damping force; and the end of the push rod away from the regulating valve core is provided with an adjustment component that can adjust the axial position of the regulating valve core.

[0010] Using the above technical solution, the second control structure can directly change the flow rate and pressure loss of hydraulic oil flowing through the gap between the valve core and the valve stem by adjusting the cross-sectional area between the regulating valve core and the fixed valve stem, thereby controlling the magnitude of the damping force. The adjustment component drives the regulating valve core to adjust its axial position by controlling the push rod away from the end of the regulating valve core, thereby synchronously linking the second control structure and the first control component to achieve simultaneous control of the damping force and the oil flow rate.

[0011] The aforementioned damping adjustable low-noise vibration damper valve assembly can be further configured such that: the second control structure includes a second adjusting block disposed on the side of the adjusting valve core facing the fixed valve stem, the second adjusting block has a second inclined surface on its outer periphery, the fixed valve stem has an oil outlet channel at its center, and the second adjusting block is placed in the oil outlet channel to cause the second inclined surface to abut against the side wall of the oil outlet channel.

[0012] By adopting the above technical solution, a second adjusting block with a second inclined surface is provided on the side of the regulating valve core facing the fixed valve stem, and it is placed in the oil outlet channel at the center of the fixed valve stem so that the second inclined surface abuts against the side wall of the oil outlet channel. When the regulating valve core moves axially, the relative position change between the second inclined surface and the side wall of the oil outlet channel can be used to change the annular flow cross-sectional area between the regulating valve core and the fixed valve stem, thereby realizing the adjustment of damping force.

[0013] The aforementioned damping adjustable low-noise vibration damper valve assembly can be further configured such that: the adjustment assembly includes an adjustment screw disposed at the end of the push rod away from the second adjustment block, an adjustment knob is fixedly installed on one side of the adjustment screw, and the adjustment screw is fixedly connected to the push rod to enable the adjustment knob to drive the push rod to move axially.

[0014] Using the above technical solution, an adjusting screw is set at the end of the push rod away from the second adjusting block, and the adjusting screw is fixedly connected to the adjusting knob and the push rod. By rotating the adjusting knob, the adjusting screw can be driven to move the push rod axially, thereby synchronously controlling the position of the regulating valve core and realizing the linkage control of the first control component and the second control structure.

[0015] The aforementioned damping adjustable low-noise vibration damper valve assembly can be further configured such that: a sleeve rod is provided between the first adjusting block and the second adjusting block, and an abutment spring is sleeved on the sleeve rod, with one end of the abutment spring abutting against the fixed valve rod and the other end abutting against the first adjusting block.

[0016] By adopting the above technical solution, one end of the abutting spring abuts against the fixed valve stem and the other end abuts against the first adjusting block. It can apply a continuous preload to the regulating valve core through its own elastic deformation, so that the first inclined surface of the first adjusting block and the oil inlet channel always keep in close contact, eliminating the influence of clearance error on flow regulation. At the same time, when the regulating component drives the push rod to move, the spring force can buffer the axial impact force, realize the flexible transition of the regulation process, and avoid instantaneous pressure fluctuations and noise caused by rigid contact.

[0017] The aforementioned damping adjustable low-noise vibration damper valve assembly can be further configured such that: the regulating valve core has several annular sealing grooves, and a sealing ring is provided in the annular sealing grooves.

[0018] By adopting the above technical solution, the elastic deformation of the sealing ring fills the gap, which can effectively prevent hydraulic oil from leaking under pressure and avoid damping force adjustment failure or system pressure drop caused by oil loss.

[0019] The aforementioned damping adjustable low-noise vibration damper valve assembly can be further configured such that: the main valve includes a piston sleeved on the outer periphery of the valve stem, throttling valve plates are provided on both sides of the piston, and positioning blocks are provided on both sides of the throttling valve plates for positioning installation.

[0020] Using the above technical solution, the piston, as the main load-bearing component, can drive the throttle valve plate to produce elastic deformation under the action of hydraulic oil. The cross-sectional area of ​​the fluid flow path can be dynamically adjusted by the opening and closing degree of the valve plate, thereby achieving a stable output of the basic damping force.

[0021] The beneficial effects of this utility model are as follows: by using the first control component on the outer periphery of the regulating valve core to adjust the size of the oil inlet channel, the oil inlet volume is controlled, thereby changing the cross-sectional area of ​​the oil inlet channel to control the flow velocity in the flow channel, thus effectively suppressing the fluid noise generated by the multi-physical field coupling effect during the hydraulic oil flow process. Attached Figure Description

[0022] Fig. 1 This is a schematic diagram of the structure of this utility model; Fig. 2 This is an enlarged view of the structure at point A of this utility model; Fig. 3 This is an enlarged view of the structure at point B of this utility model; Label annotations: 1-valve stem, 2-main valve, 3-oil inlet channel, 4-push rod, 5-adjusting valve core, 6-fixed valve stem, 7-first adjusting block, 8-first inclined surface, 9-second adjusting block, 10-second inclined surface, 11-oil outlet channel, 12-adjusting screw, 13-adjusting knob, 14-sleeve rod, 15-abutment spring, 16-sealing groove, 17-sealing ring, 18-piston, 19-throttle valve plate, 20-positioning block. Detailed Implementation

[0023] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0024] like Figs. 1-3The present invention provides the following technical solution: a damping adjustable low-noise vibration damper valve assembly, including a valve stem 1 and a main valve 2 disposed on the outer periphery of the valve stem 1. The valve stem 1 has an oil inlet channel 3 on one side of the main valve 2. An axially movable push rod 4 is disposed inside the valve stem 1. An adjusting valve core 5 is disposed on one side of the push rod 4 located in the oil inlet channel 3. A fixed valve stem 6 for oil outlet is connected to the end of the adjusting valve core 5. A first control component is disposed on the outer periphery of the adjusting valve core 5 to adjust the size of the oil inlet channel 3, thereby changing the oil inlet flow to control fluid noise. By providing an axially movable push rod 4 inside the valve stem 1 and installing the adjusting valve core 5 on the side of the push rod 4 located in the oil inlet channel 3, the first control component on the outer periphery of the adjusting valve core 5 is used to adjust the oil inlet flow. The size of channel 3 enables control of the oil inlet volume. The push rod 4 and the regulating valve core 5 can adjust the damping force and change the cross-sectional area of ​​the oil inlet channel 3 through the first control component to control the flow velocity in the channel, thereby effectively suppressing the fluid noise generated by the multi-physical field coupling effect during the hydraulic oil flow. The first control component includes a first regulating block 7 set on the outer periphery of the regulating valve core 5. The outer periphery of the first regulating block 7 is provided with a first inclined surface 8, which abuts against the oil inlet channel 3. The oil inlet volume is adjusted through the inclined surface structure. When the regulating valve core 5 moves axially, the abutment position of the first inclined surface 8 and the oil inlet channel 3 changes, which can control the hydraulic oil flow velocity in the channel, thereby suppressing the fluid noise caused by sudden or excessive flow velocity.

[0025] like Figs. 1-3The present invention provides the following technical solution: a damping-adjustable low-noise vibration damper valve assembly. The adjusting valve core 5 has a second control structure at its end that adjusts the cross-sectional area between the adjusting valve core 5 and the fixed valve stem 6 to control the damping force. The push rod 4, at its end away from the adjusting valve core 5, has an adjusting component capable of adjusting the axial position of the adjusting valve core 5. The second control structure, by adjusting the cross-sectional area between the adjusting valve core 5 and the fixed valve stem 6, can directly change the flow rate and pressure loss of hydraulic oil flowing through the gap between the valve core and the valve stem 1, thereby controlling the magnitude of the damping force. The adjusting component, by controlling the end of the push rod 4 away from the adjusting valve core 5, drives the adjusting valve core 5 to adjust its axial position, thus synchronously linking the second control structure and the first control component to achieve simultaneous damping force and oil flow rate. The second control structure includes a second adjusting block 9 disposed on the side of the regulating valve core 5 facing the fixed valve stem 6. The second adjusting block 9 has a second inclined surface 10 on its outer periphery. An oil outlet channel 11 is opened at the center of the fixed valve stem 6. The second adjusting block 9 is placed within the oil outlet channel 11, causing the second inclined surface 10 to abut against the side wall of the oil outlet channel 11. By placing the second adjusting block 9 with the second inclined surface 10 on the side of the regulating valve core 5 facing the fixed valve stem 6 and placing it within the oil outlet channel 11 at the center of the fixed valve stem 6, the relative position of the second inclined surface 10 and the side wall of the oil outlet channel 11 changes when the regulating valve core 5 moves axially, thereby altering the annular flow cross-sectional area between the regulating valve core 5 and the fixed valve stem 6, and achieving damping force adjustment. The adjustment assembly includes an adjusting screw 12 located at the end of the push rod 4 away from the second adjusting block 9. An adjusting knob 13 is fixedly installed on one side of the adjusting screw 12. The adjusting screw 12 is fixedly connected to the push rod 4, enabling the adjusting knob 13 to drive the push rod 4 to move axially. The adjusting screw 12 is located at the end of the push rod 4 away from the second adjusting block 9, and is fixedly connected to the adjusting knob 13 and the push rod 4. Rotating the adjusting knob 13 drives the adjusting screw 12 to move the push rod 4 axially, thereby synchronously controlling the position of the regulating valve core 5 and achieving linkage control between the first control assembly and the second control structure. A sleeve rod 14 is provided between the first adjusting block 7 and the second adjusting block 9. A retaining spring 15 is sleeved on the sleeve rod 14, with one end of the retaining spring 15 connected to... The fixed valve stem 6 abuts against the first adjusting block 7 at one end. The spring 15 abuts against the fixed valve stem 6 at one end and against the first adjusting block 7 at the other end. Through its own elastic deformation, it applies a continuous preload to the regulating valve core 5, ensuring that the first inclined surface 8 of the first adjusting block 7 and the oil inlet channel 3 remain tightly fitted, eliminating the impact of clearance errors on flow regulation. Simultaneously, when the adjusting assembly drives the push rod 4, the spring force buffers the axial impact force, achieving a flexible transition during the adjustment process and avoiding instantaneous pressure fluctuations and noise caused by rigid contact. The regulating valve core 5 has several annular sealing grooves 16, each containing a sealing ring 17. The elastic deformation of the sealing ring 17 fills the gap, effectively preventing hydraulic oil leakage under pressure.To prevent damping force adjustment failure or system pressure drop due to oil loss, the main valve 2 includes a piston 18 sleeved around the valve stem 1. Throttling valve plates 19 are located on both sides of the piston 18, and positioning blocks 20 are installed on both sides of the throttling valve plates 19. The piston 18, as the main load-bearing component, can drive the throttling valve plates 19 to undergo elastic deformation under the action of hydraulic oil. The cross-sectional area of ​​the fluid flow path is dynamically adjusted by the opening and closing degree of the valve plates, thereby achieving a stable output of the basic damping force.

[0026] The beneficial effects of this utility model are as follows: by using the first control component on the outer periphery of the regulating valve core 5 to adjust the size of the oil inlet channel 3, the oil inlet volume is controlled, thereby changing the cross-sectional area of ​​the oil inlet channel 3 to control the flow velocity in the flow channel, thereby effectively suppressing the fluid noise generated by the multi-physical field coupling effect during the hydraulic oil flow process.

Claims

1. A damping-adjustable low-noise vibration damper valve assembly, comprising a valve stem and a main valve disposed on the outer periphery of the valve stem, wherein the valve stem has an oil inlet channel on one side of the main valve, characterized in that: The valve stem is provided with a push rod that can move axially. The push rod is provided with an adjusting valve core on the side of the oil inlet channel. The end of the adjusting valve core is connected to a fixed valve stem for oil outlet. The outer periphery of the adjusting valve core is provided with a first control component that adjusts the size of the oil inlet channel to change the oil inlet volume and control fluid noise.

2. The damping adjustable low-noise vibration damper valve assembly according to claim 1, characterized in that: The first control component includes a first adjusting block disposed on the outer periphery of the regulating valve core, the outer periphery of the first adjusting block having a first inclined surface, the first inclined surface abutting against the oil inlet channel.

3. The damping adjustable low-noise vibration damper valve assembly according to claim 2, characterized in that: The end of the regulating valve core is provided with a second control structure that adjusts the cross-sectional area between the regulating valve core and the fixed valve stem to control the damping force. The end of the push rod away from the regulating valve core is provided with an adjustment component that can adjust the axial position of the regulating valve core.

4. The damping adjustable low-noise vibration damper valve assembly according to claim 3, characterized in that: The second control structure includes a second adjusting block disposed on the side of the regulating valve core facing the fixed valve stem. The second adjusting block has a second inclined surface on its outer periphery. The fixed valve stem has an oil outlet channel at its center. The second adjusting block is placed in the oil outlet channel to cause the second inclined surface to abut against the side wall of the oil outlet channel.

5. The damping adjustable low-noise vibration damper valve assembly according to claim 3, characterized in that: The adjustment assembly includes an adjustment screw located at the end of the push rod away from the second adjustment block. An adjustment knob is fixedly installed on one side of the adjustment screw. The adjustment screw is fixedly connected to the push rod, enabling the adjustment knob to drive the push rod to move axially.

6. A damping-adjustable low-noise vibration damper valve assembly according to any one of claims 2-4, characterized in that: A sleeve rod is provided between the first adjusting block and the second adjusting block. A retaining spring is sleeved on the sleeve rod. One end of the retaining spring abuts against the fixed valve stem, and the other end abuts against the first adjusting block.

7. A damping-adjustable low-noise vibration damper valve assembly according to claim 6, characterized in that: The regulating valve core has several annular sealing grooves, and a sealing ring is provided in each annular sealing groove.

8. A damping-adjustable low-noise vibration damper valve assembly according to claim 7, characterized in that: The main valve includes a piston sleeved on the outer periphery of the valve stem, and throttling valve plates are provided on both sides of the piston. Positioning blocks are provided on both sides of the throttling valve plates for positioning.

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