TWM604369U - Pressure reducing valve - Google Patents

Abstract

A pressure reducing valve includes an outer shell, a guide shell that cooperates with the outer shell to define an inner space, a main disc valve arranged in the inner space, a main disc valve arranged in the inner space and located in the guide shell and the inner space. The valve seat between the main disc valve, a valve plate group clamped between the main disc valve and the valve seat, and a pilot poppet. The valve plate group cooperates with the housing and the main disc valve to define a high pressure area and a low pressure area. The valve plate group also cooperates with the valve seat and the main disc valve to define a middle pressure area, the high pressure area And the middle pressure zone are located on opposite sides of the valve plate group. When the pressure of the high pressure zone exceeds the pressure of the middle pressure zone to the set value, the valve plate group is pushed up by the pressure and bends and deforms. The high-pressure zone is connected to the low-pressure zone, the valve plate group can be adjusted according to requirements, the degree of freedom is high, and the damping force response is good.

Description

Pressure reducing valve

The new model relates to a control valve, especially a pressure reducing valve.

The general vehicle shock absorber will be compressed or stretched by the body due to the bumpy condition 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 of riding in the vehicle. The response characteristics and damping force of the vehicle's shock absorber will also affect the handling 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. In this type of shock absorber, there is a pressure reducing valve mechanism that opens and closes according to the pressure to further adjust the damping force characteristics. Most valve mechanisms use springs as the key component of resisting pressure, that is, when the pressure is greater than the elastic restoring force of the spring, the valve body can be opened, but the spring is prone to fatigue due to repeated compression and loses elasticity, resulting in inaccurate pressure control and stability It is low, and it is not easy to adjust the valve opening pressure according to the demand. In addition, the structure of the spring spirally extending in the space also easily produces turbulence to the flowing hydraulic oil, so there is still room for improvement.

Therefore, the purpose of the present invention is to provide a pressure reducing valve with good stability and easy customization.

Therefore, the pressure reducing valve of the present invention includes a housing, a guide housing that cooperates with the housing to define an inner space, a main disc valve arranged in the inner space, and a main disc valve arranged in the inner space and located in the guide. The valve seat between the housing and the main disc valve, a valve plate group clamped between the main disc valve and the valve seat, and a valve plate group movably arranged on the guide housing in its own axial direction and facing toward The valve seat extends the pilot poppet.

A plurality of penetrating pressure relief holes are formed on the outer peripheral surface of the shell, and a through hole is formed on the bottom surface. The valve plate assembly cooperates with the housing and the main disc valve to define a high pressure area communicating with the through hole and a low pressure area communicating with the pressure relief holes. The valve plate assembly is also connected to the valve seat and the main disc valve. Cooperating to define an intermediate pressure zone communicating with the high pressure zone, the high pressure zone and the intermediate pressure zone are located on opposite sides of the valve plate group, when the pressure in the high pressure zone exceeds the pressure in the intermediate pressure zone to a set value , The valve plate group is pushed by the pressure to bend and deform, and the high pressure area is connected to the low pressure area.

The effect of the new model is that the valve plate group can be adjusted according to the needs of the number, material, thickness, etc. of the valve plate, so as to adjust the bending pressure setting value of the valve plate group according to the demand. The adjustment degree of freedom is high and it is convenient for customization. In addition, the new type has fewer moving parts and is less prone to turbulence, can reduce the generation of abnormal noise and resonance, has good durability and stability, and the valve plate group also has the advantages of linkage and damping force response.

Refer to Figures 1 and 2, which is an embodiment of a new type of pressure reducing valve, which is suitable for a proportional valve device of a vehicle shock absorber. The pressure reducing valve includes a housing 1 and a housing 1 that cooperates to define a The guide shell 2 of the inner space 23, a main disc valve 3 arranged in the inner space 23, a valve seat 4 arranged in the inner space 23 and located between the guide shell 2 and the main disc valve 3, a The valve disc group 5 clamped between the main disc valve 3 and the valve seat 4, two invalid valve discs 6 clamped between the guide housing 2 and the valve seat 4, and a A pilot poppet 7 which is arranged on the guide housing 2 and extends toward the valve seat 4 so as to move along the axial direction of the control.

The casing 1 has a plurality of pressure relief holes 11 penetrating and opening laterally on the outer peripheral surface, and a through hole 12 is formed on the bottom surface. The guide shell 2 surrounds an accommodating space 21 at the center, and an opening 22 formed on the top surface that communicates the accommodating space 21 and the outside. The guide shell 2 cooperates with the housing 1 to define an internal space 23, and the outer circumferential surface of the guide shell 2 and the inner circumferential surface of the housing 1 cooperate to define a gap 80 communicating with the outside.

The main disc valve 3 includes a disc body portion 31, a positioning portion 32 protruding from the center of the disc body portion 31 toward the valve seat 4 and passing through the valve plate group 5, a surrounding and connecting the positioning portion 32 and An inner protruding portion 33 protruding on the plate body portion 31, a middle protruding portion 34 protruding on the plate portion 31 surrounding the inner protruding portion 33 and spaced from the inner protruding portion 33 , And an outer protrusion 35 surrounding the middle protrusion 34 and protruding from the outer edge of the disc body portion 31 toward the valve seat 4. The disc body portion 31 is provided with a decompression hole 311 extending upward to the positioning portion 32 and facing the through hole 12, a plurality of which are located between the inner convex portion 33 and the middle convex portion 34 and arranged in a ring shape The inner through hole 312, and a plurality of outer through holes 313 located between the middle convex portion 34 and the outer convex portion 35 and arranged in a ring shape.

The valve seat 4 includes a seat portion 41, an inner convex wall portion 42 protruding from the seat body portion 41 and surrounding the positioning portion 32, and an outer edge of the seat body portion 41 surrounding the inner convex wall portion 42 An outer convex wall portion 43 protruding toward the main disc valve 3. The seat portion 41 defines a through groove 411 that is surrounded by the inner convex wall portion 42 and communicates with the pressure relief hole 311 and the accommodating space 21. The valve plate group 5 includes a plurality of main valve plates 51 stacked on each other and sleeved on the positioning portion 32, and one stacked on the main valve plates 51 and having a diameter larger than the main valve plates 51 and sleeved on the main valve plates 51. The slit valve plate 52 on the positioning portion 32 and the isolating plate 53 stacked on the slit valve plate 52 and having a diameter larger than that of the slit valve plate 52 are stacked in two. The inner peripheral edges of the main valve discs 51 and the slit valve disc 52 are sandwiched by the inner convex wall portion 33 and the inner convex wall portion 42, and the outer peripheral edges of the main valve discs 51 are supported by the middle convex wall portion 34 The outer periphery of the slit valve plate 52 is sandwiched between the main valve plates 51 and the isolation plates 53. The inner peripheral edges of the spacers 53 are stacked on the slit valve plate 52, and the outer peripheral edges are sandwiched by the outer convex wall portion 35 and the outer convex wall portion 43. Among the main valve plates 51 located at the bottom and contacting the main disc valve 3, there are two slits 511 extending radially inward from the outer edge, which can be used to control the damping of the low speed. The slit valve plate 52 has two grooves 521 extending radially outward from the center, which can reduce leakage between the isolation plates 53. The disc body portion 31, the inner convex wall portion 33, the middle convex wall portion 34, and the valve plate sets 5 cooperate to define an inner ring space 81, the inner ring space 81, the inner through holes 312, The through hole 12 communicates with each other to define a high pressure zone. The plate body portion 31, the middle protrusion portion 34, and the outer protrusion portion 35 cooperate to define an outer ring space 82 surrounding the inner ring space 81. The outer ring space 82, the outer through holes 313, and the pressure relief holes 11 communicate with each other to define a low pressure zone. The seat portion 41, the inner convex wall portion 42, the outer convex wall portion 43, and the valve plate assembly 5 cooperate to define an upper ring space 83, and the upper ring space 83 communicates with the pressure relief hole 311 and the through groove 411 A middle-pressure zone connected to the high-pressure zone is defined. The invalid valve plates 6 cooperate with the guide shell 2 to define an upper space 61 communicating with the accommodating space 21, and cooperate with the valve seat 4 to define a lower space 62 communicating with the gap 80. A piece of failure valve plate 6 adjacent to the guide housing 2 can be radially provided with a plurality of notches 63 extending inward from the outer edge. The notch 63 can accurately control the low-speed damping in the failure mode. The pilot lift head 7 penetrates the opening 22 to extend into the accommodating space 21, and extends toward the through groove 411, and can be controlled to move toward the through groove 411 along its own axial direction until the pilot lifts The moving head 7 blocks the through groove 411 to control the opening of the through groove 411.

Refer to Figure 1, Figure 2, and Figure 3, Figure 3 is a state of the embodiment installed in a shock absorber 9, the hydraulic oil of this embodiment mainly flows in through the through hole 12, through the pressure relief hole 311 and The through groove 411 enters the accommodating space 21, and finally passes through the accommodating space 21 and then flows out from the opening 22 (please refer to path A in FIG. 3). The opening of the through groove 411 can be controlled by controlling the pilot lift head 7 Move and adjust to achieve the effect of adjusting the damping force. When the pressure in the high pressure zone exceeds the pressure in the middle pressure zone to a set value, the main valve discs 51 and the slit valve discs 52 are pushed by the pressure and bend and deform as shown in FIG. The ring space 81 is connected to the outer ring space 82, so that the hydraulic oil can follow the through hole 12→the inner through holes 312→the inner ring space 81→the outer ring space 82→the outer through holes 313→the pressure relief The path B of the hole 11 is sent from the pressure relief holes 11 to achieve the effect of adjusting the pressure and adjusting the damping force characteristics. The user can change the thickness, quantity, fulcrum (that is, the position of the middle convex portion 34) and other parameters of the valve plate group 5 according to requirements to adjust the pressure setting value (that is, the valve opening pressure), and the adjustment freedom is high. The design of the valve plate can improve the responsiveness and stability of the damping force, and reduce the turbulence and cost. In addition, since this embodiment requires fewer moving parts, it also has the advantages of smaller overall volume, lighter weight, and less vibration and noise. In addition, by adjusting the size and number of the grooves 521 of the slit valve plate 52, the flow rate in the middle pressure zone can be controlled. It should be noted that when the hydraulic oil is flowing, there are still a few that will pass through the gap between the components along the path C or the path D.

Refer to Figure 1, Figure 2, and Figure 4, Figure 4 is a state of the embodiment installed in a shock absorber 9, when the pilot poppet 7 fails due to a failure (usually because the pilot poppet The solenoid coil of 7 is not energized or can not operate normally, causing the pilot poppet 7 to fail to move, and is pushed away from the through slot by the return spring 411). The failed valve plates 6 can still be under certain pressure as shown in Figure 4 The ground is bent and deformed to connect the upper space 61 and the lower space 62, allowing part of the hydraulic oil to flow through the path C and generate a damping force, so that when the pilot poppet 7 fails or is not energized You can still move down.

In summary, the valve plate group 5 is easy to detect the size and characteristics, and has a high degree of freedom of adjustment. It also has the advantages of good damping force response. It is suitable for use in the proportional valve device of the shock absorber, so it can indeed achieve the new cost The purpose.

However, the above-mentioned are only examples of the present model, and should not be used to limit the scope of implementation of the present model, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

1: shell 11: Pressure relief hole 12: Through hole 2: guide shell 21: Housing space 22: opening 23: Internal space 3: Main disc valve 31: Disc body 311: Pressure relief hole 312: Inner through hole 313: Outer through hole 32: positioning part 33: Inner convex wall 34: Central Protruding Wall 35: Outer convex wall 4: Valve seat 41: seat body 411: channel 42: Inner convex wall 43: Outer convex wall 5: Valve plate group 51: main valve piece 511: Gutter 52: slit valve 521: groove 53: spacer 6: Failure valve 61: upper space 62: Lower space 63: missing slot 7: Pilot poppet 80: gap 81: inner ring space 82: Outer Ring Space 83: Sheung Wan Space 9: shock absorber A~D: path

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, among which: Figure 1 is a three-dimensional exploded view illustrating an embodiment of the pressure reducing valve of the present invention; Figure 2 is a side cross-sectional view illustrating the cross-sectional aspect of the embodiment; Fig. 3 is a side cross-sectional view showing the state of the embodiment in a shock absorber, which is used to illustrate the bending and deformation state of a valve plate group; and 4 is a side cross-sectional view showing the state of the embodiment in a shock absorber, and is used to illustrate the bending and deformation state of the two failed valve plates.

1: shell

11: Pressure relief hole

12: Through hole

2: guide shell

21: Housing space

22: opening

3: Main disc valve

31: Disc body

311: Pressure relief hole

312: Inner through hole

313: Outer through hole

32: positioning part

33: Inner convex wall

34: Central Protruding Wall

35: Outer convex wall

4: Valve seat

41: seat body

411: channel

43: Outer convex wall

5: Valve plate group

51: main valve piece

511: Gutter

52: slit valve

521: groove

53: spacer

6: Failure valve

63: missing slot

7: Pilot poppet

Claims (9)

A pressure reducing valve comprising: A shell, with a plurality of penetrating pressure relief holes formed on the outer peripheral surface, and a through hole formed on the bottom surface; A guide shell which cooperates with the shell to define an internal space; A main disc valve arranged in the internal space; A valve seat arranged in the internal space and between the guide housing and the main disc valve; A valve plate group is clamped between the main disc valve and the valve seat. The valve plate group cooperates with the housing and the main disc valve to define a high-pressure zone communicating with the through hole and a communicating drain In the low pressure area of the pressure hole, the valve plate assembly also cooperates with the valve seat and the main disc valve to define an intermediate pressure zone communicating with the high pressure zone. The high pressure zone and the intermediate pressure zone are respectively located opposite to the valve plate assembly On both sides, when the pressure in the high-pressure zone exceeds the pressure in the middle-pressure zone to a set value, the valve plate group is pushed by the pressure to bend and deform, and the high-pressure zone is connected to the low-pressure zone; and A pilot poppet is movably arranged on the guide shell along its own axial direction and extends toward the valve seat. The pressure reducing valve according to claim 1, wherein the main disc valve includes a disc body, a positioning part protruding from the center of the disc body toward the valve seat and penetrating the valve plate assembly, and a connection The positioning portion is protruded on the disc body and abuts against the inner convex part of the valve plate assembly, and a protruding part surrounds the inner convex part on the disc body and abuts against the middle of the valve disc assembly The convex wall part, and an outer convex wall part surrounding the middle convex wall part and projecting from the outer edge of the disc body part toward the valve seat, the disc body part is provided with a decompression hole extending to the positioning part, a plurality of An inner through hole located between the inner raised wall portion and the middle raised wall portion, and a plurality of outer through holes located between the middle raised wall portion and the outer raised wall portion. The pressure reducing valve according to claim 2, wherein the disc body portion, the inner convex wall portion, the middle convex wall portion, and the valve plate assembly of the main disc valve cooperate to define an inner ring space, the The disc body portion, the middle convex portion, and the outer convex portion cooperate to define an outer ring space surrounding the inner ring space, and the inner ring space, the inner through holes, and the through holes communicate with each other to define Out of the high pressure zone, the outer ring space, the outer through holes, and the pressure relief holes communicate with each other to define the low pressure zone. The pressure reducing valve according to claim 3, wherein the valve seat includes a seat, an inner convex wall protruding from the seat and surrounding the positioning portion of the main disc valve, and a surrounding convex The wall portion is an outer convex wall portion protruding from the outer edge of the seat body portion toward the main disc valve. The inner convex wall portion cooperates with the inner convex wall portion to clamp the valve plate group, and the outer convex wall portion and the The outer protruding wall part cooperates to clamp the valve disc group, the seat body part defines a through groove surrounded by the inner protruding wall part and communicating with the pressure relief hole, the seat body part, the inner protruding wall part, the outer The convex wall and the valve plate group cooperate to define an upper ring space, and the upper ring space communicates with the pressure relief hole and the through groove to define the middle pressure zone. The pressure reducing valve according to claim 4, wherein the valve plate group includes a plurality of main valve plates stacked on each other and sleeved on the positioning portion of the main disc valve, and one stacked on the main valve plates with a diameter A slit valve plate larger than the main valve plates and sleeved on the positioning portion, and at least one isolating plate stacked on the slit valve plate and having a diameter larger than the slit valve plate, the main valve plates and the The inner peripheral edge of the slit valve plate is clamped by the inner convex wall part and the inner convex wall part of the valve seat, the outer peripheral edge of the main valve plate is supported by the middle convex wall part, and the inner peripheral edge of the at least one spacer It is stacked on the slit valve plate, and the outer periphery is clamped by the outer convex wall part and the outer convex wall part. The pressure reducing valve according to claim 5, wherein the guide shell defines an accommodating space for accommodating the pilot poppet and communicating with the through groove of the valve seat, and an accommodating space communicating with the accommodating space and the outside for the The pilot lift head is penetrated through the opening, and the pilot lift head can be controlled to move toward the through groove to control the opening of the through groove. The pressure reducing valve according to claim 6, further comprising at least one failure valve plate whose inner periphery is clamped between the guide shell and the valve seat, the outer shell and the guide shell cooperate to define a gap, the at least A failed valve plate cooperates with the guide shell to define an upper space communicating with the accommodating space, and cooperates with the valve seat to define a lower space communicating with the gap. The at least one failed valve plate is subject to certain Under pressure, it will bend and deform, so that the upper space is connected to the lower space. The pressure reducing valve according to claim 5, wherein one of the main valve plates contacting the main disc valve has a plurality of slits extending radially inward from the outer edge. The pressure reducing valve according to claim 5, wherein the slit valve plate has a plurality of grooves extending radially outward from the center.

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