TWI719712B - Damping control device - Google Patents

Abstract

A damping control device which connects to a damping cylinder. Said damping control device comprises a housing which is fixed to said damping cylinder, a pressure-reducing unit which is positioned in said housing and defines a connection channel which connects to said damping cylinder, a control unit which connects to said damping cylinder, a plurality of adjustment valves configured to push said control unit, and a actuatorwhich is located between said pressure-reducing unit and said adjustment valves.

Description

Damping control device

The present invention relates to a control device, in particular to a damping control device for vehicle shock absorbers.

The general vehicle shock absorber will be compressed or stretched by the body due to the bumpy conditions of the road, and the hydraulic oil in the vehicle shock absorber will be compressed and flow through the pores. When the hydraulic oil passes through the pores, a damping force will be generated. The damping force can provide cushioning and improve the comfort when riding in the vehicle. The response characteristics and damping force of the vehicle's shock absorber will also affect the maneuverability and safety of the vehicle when turning.

In order to make the best response according to different vehicle driving conditions, the current vehicle shock absorbers on the market mostly use the motor to adjust the valve size to control the damping force according to the demand, but the aforementioned adjustment method will be based on the response of the motor actuation. The time is slow, and the responsiveness is not good, and the damping force adjustment is not linear enough to cause poor comfort. Therefore, there are shock absorbers that use a proportional valve to control the flow rate to adjust the damping force. However, springs are often used as the reset mechanism in this type of shock absorbers. The springs are prone to elasticity fatigue under long-term use, and they must be adapted to the needs of different models. When adjusting the characteristics, there are fewer parameters that the spring can adjust, which is not conducive to modularization.

Therefore, the purpose of the present invention is to provide a damping control device that is conducive to modularization.

Therefore, the damping control device of the present invention communicates with a damping cylinder. The damping control device includes a housing fixed on the damping cylinder, a decompression unit provided in the housing and defining a connecting passage communicating with the damping cylinder, and a decompression unit that cooperates with the housing and the decompression unit A control unit communicating with the overflow space of the damping cylinder, a plurality of adjusting valve plates stacked on each other in an axial direction and pushing against the control unit are defined, and a control valve plate located between the pressure reducing unit and the adjusting valve plates The main lift head.

The control unit can be operated to control the flow of hydraulic oil into the overflow space. The main poppet surrounds an opening connecting the connecting passage and the control unit. When the hydraulic oil pressure in the pressure reducing unit is equal to the hydraulic oil pressure in the control unit, the main poppet is adjusted by the The valve plate presses against the pressure reducing unit and allows hydraulic oil to flow into the control unit through the opening. When the pressure of the hydraulic oil in the pressure reducing unit is greater than the pressure of the hydraulic oil in the control unit, the main lift The head is pushed by the hydraulic oil along the axial direction to compress the regulating valve plates, so that the main poppet is away from the pressure reducing unit to form a gap communicating with the overflow space.

The effect of the present invention is that the flow of hydraulic oil into the overflow space can be controlled through the proportional valve, so that the pressure of the hydraulic oil in the pressure reducing unit and the control unit can be changed, and the main poppet can be pushed to achieve adjustment. The effect of damping force, and these adjusting valves are used to provide elastic restoring force. All or part of the adjusting valve plates can be replaced according to the different needs of different models to change the rigidity or quantity of the adjusting valve plates. The damping characteristics can be further adjusted to facilitate modularization.

Referring to Fig. 1, an embodiment of the damping control device 1 of the present invention is suitable for installation on a damping tube 2 of a vehicle shock absorber. The damping control device 1 includes a housing 3 fixed on the damping cylinder 2, a decompression unit 4 arranged in the housing 3, and a decompression unit 4 spaced apart from the decompression unit 4 along an axial direction A. The control unit 5 inside the housing 3, a plurality of regulating valve plates 6 stacked on each other along the axial direction A and located between the decompression unit 4 and the control unit 5, and a regulating valve plate 6 located between the decompression unit 4 and the control unit 5 The main poppet 7 with an opening 70 is adjusted between the valve plates 6 and surrounds it.

The decompression unit 4 includes a base 41 surrounding a connecting channel 410, a housing 42 connecting the base 41 and the housing 3 and surrounding a through opening 420, and a housing 42 disposed in the housing 42 and opening A valve seat 43 having a plurality of holes 430, and a plurality of pressure reducing valve plates 44 disposed between the housing seat 42 and the valve seat 43 along the axial direction A and stacked on each other. The connecting passage 410 communicates with the damping cylinder 2, and hydraulic oil can sequentially pass through the connecting passage 410, the holes 430 of the valve seat 43, the pressure reducing valve plates 44, and the port 420.

The control unit 5 cooperates with the housing 3 and the decompression unit 4 to define an overflow space B communicating with the damping cylinder 2. The control unit 5 includes a proportional valve 51 arranged in the housing 3, a fixed seat 52 arranged between the adjusting valve plates 6 and the proportional valve 51 along the axial direction A, and a fixed seat 52 fixed to the fixed The guide seat 53 between the seat 52 and the proportional valve 51, and a pilot poppet 54 that can be driven by the proportional valve 51. The proportional valve 51 has an electromagnetic coil 511, a push rod 512 that is connected to the pilot poppet 54 and can be driven by the solenoid 511 in the axial direction A, and a push rod 512 that surrounds the pilot poppet 54 and abuts against the pilot poppet 54 The spring 513 of the push rod 512. The fixed seat 52 has an outer seat portion 521 connected to the proportional valve 51 and surrounding the adjusting valve plates 6, and an inner seat portion 522 screwed in the outer seat portion 521 and pressed against the adjusting valve plates 6 . The inner seat portion 522 can be rotated relative to the outer seat portion 521 along the axial direction A to change the force against the regulating valve plates 6.

The diversion seat 53 has a seat portion 531 fixed between the outer seat portion 521 and the proportional valve 51 and defining a pressure relief hole 530, and a seat portion 531 along the axial direction A The head 532 of the inner seat 522 extends toward the main lifting head 7 and penetrates therethrough. The seat portion 531 defines an internal space 533 for accommodating the spring 513 and communicating with the pressure relief hole 530, and the pressure relief hole 530 directly communicates with the overflow space B. The head 532 defines an extension slot 534 that communicates with the internal space 533 and extends along the axial direction A, and a plurality of side holes 535 that communicate with the extension slot 534 and the opening 70 of the main poppet 7. The pilot poppet 54 extends in the extension groove 534 and defines a circulation gap 55 communicating with the side holes 535 together with the diversion seat 53.

When the solenoid 511 of the proportional valve 51 is energized, the push rod 512 will move in the axial direction A toward the direction of the main poppet 7 to compress the spring 513 and push the pilot poppet 54 outward , So that the flow of the circulation gap 55 and the internal space 533 is reduced. When the pilot poppet 54 is pushed to the bottom, only a small part of the hydraulic oil can enter the interior through the side holes 535 through the circulation gap 55 The space 533 flows into the overflow space B through the pressure relief hole 530. When the solenoid 511 is not energized, the push rod 512 is pushed by the spring 513 to reset, and the push rod 512 and the circulation gap 55 are moved inwardly away from the main poppet 7 to make the circulation gap The flow rate between 55 and the internal space 533 is increased to the maximum, so that most of the hydraulic oil can enter the internal space 533 from the side hole 535 through the circulation gap 55, and then flow into the overflow space B through the pressure relief hole 530. By controlling the energization amount of the electromagnetic coil 511, the flow rate of the circulation gap 55 and the internal space 533 can be controlled.

1 and 2, the operation process of this embodiment is as follows: when the solenoid 511 of the proportional valve 51 is energized, and the flow between the circulation gap 55 and the internal space 533 is the smallest as shown in FIG. 1, The hydraulic oil in the damping cylinder 2 will enter through the connecting passage 410 and pass through the hole 430 of the valve seat 43, the pressure reducing valve plates 44 and the port 420 of the housing 42 in sequence. Then the hydraulic oil will be blocked by the main poppet 7 of the decompression unit 4, and can only flow into the inner seat 522 from the opening 70 in the middle of the main poppet 7. At this time, most of the hydraulic oil The oil will stay in the inner seat 522, so that the pressure in the inner seat 522 is approximately equal to the hydraulic oil entering the connecting passage 410, so that the main poppet 7 will not be pushed against the housing seat. 42. It should be particularly noted that in the foregoing process, a small part of the hydraulic oil will flow into the pressure relief hole 530 through the side holes 535, and the damping force at this time is relatively hard.

On the other hand, when the solenoid 511 of the proportional valve 51 is energized to make the flow between the circulation gap 55 and the internal space 533 larger as shown in Figure 2 (that is, the main poppet 7 is opposite to each other). Side pressure is different), the hydraulic oil in the inner seat portion 522 will enter the overflow space B through the side holes 535 through the pressure relief hole 530 in a large amount, so that the pressure in the inner seat portion 522 is smaller than the connection The pressure of the passage 410, therefore, the hydraulic oil passing through the port 420 will push the main poppet 7 in the direction of the guide seat 53 along the axial direction A, so that the main poppet 7 is far away from the housing 42. A gap connecting the overflow space B is formed, so most of the hydraulic oil passing through the port 420 will flow out of the gap after pushing the main poppet 7, and the damping force at this time is relatively soft. When the electromagnetic coil 511 is not energized, the flow into the internal space 533 is the largest, so that there is the largest gap between the main poppet 7 and the housing 42 and the damping force at this time is the softest. It should be particularly noted that the main poppet 7 will push against the adjusting valve plates 6 during the aforementioned movement process, deforming the adjusting valve plates 6 and generating elastic force for resetting, by changing different adjusting valve plates. 6. The rigidity of the adjusting valve plates 6 can be changed, and the inner seat portion 522 can be screwed relative to the outer seat portion 521, so that the force pressing the adjusting valve plates 6 can be changed, so that the adjustments can also be adjusted. The characteristics of the valve plate 6, and by adjusting the characteristics of the adjustment valve plates 6, the movement stroke of the main poppet 7 and the size of the gap formed can be adjusted to achieve the effect of finely adjusting the damping force.

In summary, the proportional valve 51 can electrically control the moving position of the pilot poppet 54 according to requirements, thereby changing the damping characteristics according to requirements. The adjusting valve plates 6 can provide elastic force for resetting after being compressed, and the user can replace the adjusting valve plates 6 of different rigidity and different specifications according to the needs, which can correspond to vehicles of different specifications, which is beneficial to modularization And to improve the convenience of use, it can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

1: Damping control device 2: Damping cylinder 3: shell 4: Decompression unit 41: Pedestal 410: connection channel 42: Shell seat 420: Port 43: valve seat 430: Hole 44: pressure reducing valve 5: Control unit 51: Proportional valve 511: Electromagnetic coil 512: putter 513: Spring 52: fixed seat 521: Outer Seat 522: inner seat 53: diversion seat 530: Pressure Relief Hole 531: Seat Body 532: head 533: Internal Space 534: Extension Slot 535: side hole 54: Pilot lift head 55: Circulation gap 6: Adjust valve 70: Hole 7: Main lifting head A: Axial direction B: overflow space

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a cross-sectional view illustrating an embodiment of the damping control device 1 of the present invention; and Figure 2 is a cross-sectional view illustrating the movement of one of the main poppets in this embodiment.

1: Damping control device

2: Damping cylinder

3: shell

4: Decompression unit

41: Pedestal

410: connection channel

42: Shell seat

420: Port

43: valve seat

430: Hole

44: pressure reducing valve

5: Control unit

51: Proportional valve

511: Electromagnetic coil

512: putter

513: Spring

52: fixed seat

521: Outer Seat

522: inner seat

53: diversion seat

530: Pressure Relief Hole

531: Seat Body

532: head

533: Internal Space

534: Extension Slot

535: side hole

54: Pilot lift head

55: Circulation gap

6: Adjust the valve plate

70: Hole

7: Main lifting head

A: Axial direction

B: overflow space

Claims (5)

A damping control device communicates with a damping cylinder. The damping control device includes: a housing fixed on the damping cylinder; a decompression unit arranged in the housing and defining a connecting passage communicating with the damping cylinder, The decompression unit includes a base surrounding the connecting channel, a housing connected to the base and the shell and surrounding a port, a valve seat arranged in the housing, and a plurality of The pressure reducing valve plates arranged between the shell seat and the valve seat and stacked on each other, the hydraulic oil in the connecting channel can enter the port through the valve seat and the pressure reducing valve plates; a control unit, Cooperating with the housing and the decompression unit to define an overflow space communicating with the damping cylinder, the control unit can be operated to control the flow of hydraulic oil into the overflow space; a plurality of adjusting valve plates are along an axial direction Stacked on each other and pushed against the control unit; and a main poppet located between the decompression unit and the adjusting valve plates, the main poppet surrounds an opening connecting the connecting channel and the control unit, When the hydraulic oil pressure in the decompression unit is equal to the hydraulic oil pressure in the control unit, the main poppet is pressed against the decompression unit by the regulating valve plates, and when the main poppet abuts against the pressure reduction unit When the housing of the decompression unit is connected, the port communicates with the opening and allows hydraulic oil to flow into the control unit from the opening. When the pressure of the hydraulic oil in the decompression unit is greater than the pressure of the hydraulic oil in the control unit , The main poppet is pushed by the hydraulic oil in the axial direction to compress the regulating valve plates, so that the main poppet is far away from the decompression unit to form a gap communicating with the overflow space. When the main lift When the moving head is far away from the housing, the The opening communicates with the overflow space and the opening. The damping control device according to claim 1, wherein the control unit includes a proportional valve arranged in the housing, a fixed seat arranged between the adjusting valve plates and the proportional valve along the axial direction, A diversion seat fixed between the fixed seat and the proportional valve and defining a pressure relief hole, and a pilot poppet that can be driven by the proportional valve to adjust the flow rate of the pressure relief hole, the pressure relief hole Connect the overflow space. The damping control device according to claim 2, wherein the diversion seat of the control unit has a seat portion fixed between the fixed seat and the proportional valve and defining the pressure relief hole, and a seat portion defined by the pressure relief hole. The seat body portion extends along the axial direction toward the main poppet to pass through the head of the fixing seat, the seat body portion defines an internal space communicating with the pressure relief hole, and the head defines a communicating interior Space and an extension groove extending along the axial direction, and a plurality of side holes connecting the extension groove and the opening of the main lift head, the pilot lift head extends in the extension groove and is connected to the diversion seat A circulation gap connecting the side holes is defined together. When the pilot poppet is driven by the proportional valve, the circulation gap can be moved in the axial direction to change the gap between the circulation gap and the internal space. flow. The damping control device according to claim 3, wherein the proportional valve of the control unit has an electromagnetic coil, a push rod connected to the pilot poppet and can be driven by the electromagnetic coil in the axial direction, and a container A spring placed in the internal space and surrounding the pilot poppet will push the push rod in the axial direction to provide an elastic restoring force away from the guide seat. When the solenoid coil is energized, the push The rod moves toward the deflector in the axial direction and compresses the elastic When the electromagnetic coil is not energized, the push rod is pushed by the spring to reset. The damping control device according to claim 2, wherein the fixed seat has an outer seat portion connected to the proportional valve and surrounding the adjustment valve plates, and a screw installed in the outer seat portion and abuts against the adjustment valves The inner seat part of the disc can be rotated and moved in the axial direction relative to the outer seat part to change the force against the regulating valve discs.

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