Two-way pilot damper regulating valve and solenoid type shock absorber

Abstract

The application provides a bidirectional pilot damping adjusting valve and an electromagnetic valve type shock absorber, and relates to the technical field of engineering hydraulic pressure. The bidirectional pilot damping adjusting valve comprises a valve body, the valve body has a containing cavity and a first valve port, a second valve port and a constant-through part capable of communicating with the containing cavity; a main valve assembly, the main valve assembly comprises a main valve core, the main valve core is arranged in the containing cavity, the main valve core comprises a main body part and a ring-shaped part, the ring-shaped part is arranged on one side of the main body part, the main body part and the valve body surround a first cavity and a second cavity, the main body part is provided with a third cavity, a first channel, a second channel and a third channel; a pilot valve assembly, the pilot valve assembly surrounds a fourth cavity with the ring-shaped part and the main body part; and a driving assembly, the driving assembly is used for driving the pilot valve assembly to move, so as to adjust the volume of the fourth cavity. The bidirectional pilot damping adjusting valve can effectively solve the problems in the prior art. The damping adjusting range of the shock absorber using the bidirectional pilot damping adjusting valve is larger, and the upper limit of the pressure that can be damped is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering hydraulics, in particular to a bidirectional pilot damping adjusting valve and an electromagnetic valve type shock absorber. BACKGROUND

[0002] The motorcycle shock absorber is the most important core hardware of the motorcycle suspension system, which can alleviate the vibration generated by the automobile in the process of running by damping the energy generated by the vibration, thereby improving the safety. At the same time, the automobile shock absorber can also provide high comfort. The driver's requirements for the comfort, stability and maneuverability of the vehicle are getting higher and higher, which means that the automobile shock absorber needs to be continuously updated and developed to improve its technical level. The semi-active suspension can adjust the damping characteristics of the suspension according to the road conditions, which can balance the ride comfort and control stability in the variable driving process and in the harsh road conditions. Because its control quality is close to that of the active suspension, and its structure is relatively simple and cost-effective compared with the active suspension, it is the mainstream of the use of automobile suspension.

[0003] The hardware core of the semi-active suspension is the adjustable shock absorber, which can be divided into three categories: step-type shock absorber, electromagnetic valve type shock absorber and magnetic variable flow type shock absorber. The step-type shock absorber adjusts the damping force by pushing the needle valve adjusting valve opening through the step motor, which cannot realize stepless speed regulation and has a slow response time. The magnetic variable flow type shock absorber adjusts the damping size by the characteristics of the magnetic rheological fluid, which has a high cost. The electromagnetic valve type shock absorber adjusts the valve opening through the electromagnetic valve, thereby linearly adjusting the damping size, which has the characteristics of stepless speed regulation, wide damping adjustment range, short response time and low cost, and is the mainstream trend of the future medium and high-end automobile market. At present, the core component of the semi-active electronic shock absorber for continuous damping adjustment is the damping adjusting valve, which can be divided into unidirectional damping adjusting valve and bidirectional damping adjusting valve according to the oil flow direction of the damping adjusting valve.

[0004] However, the existing bidirectional damping adjusting valve has the problems of small pressure adjustment range and small adjustment pressure. SUMMARY

[0005] The purpose of the present application is to provide a bidirectional pilot damping adjusting valve which can improve the problems of small pressure adjustment range and small adjustment pressure of the existing bidirectional damping adjusting valve.

[0006] Another purpose of the present application is to provide an electromagnetic valve type shock absorber having all the characteristics of the bidirectional pilot damping adjusting valve described above.

[0007] The embodiment of the present application is implemented as follows:

[0008] The embodiment of the present application provides a bidirectional pilot damping adjusting valve, which comprises:

[0009] a valve body having a containing cavity, a first valve port, a second valve port and a constant port capable of communicating with the containing cavity;

[0010] a main valve assembly including a main valve core, the main valve core being arranged in the containing cavity, the main valve core including a main body portion and a ring portion, the ring portion being arranged at one side of the main body portion, the main body portion and the valve body enclosing a first chamber, a second chamber, the main body portion being provided with a third chamber, a first passage, a second passage and a third passage;

[0011] a pilot valve assembly enclosing a fourth chamber with the ring portion and the main body portion;

[0012] a driving assembly for moving the pilot valve assembly to adjust the volume of the fourth chamber;

[0013] wherein the first valve port and the second valve port are kept constantly communicating through the first chamber and the first passage, the second chamber and the third chamber are communicated through the second passage, the third chamber is openably and closably connected with the second valve port, the third chamber is openably and closably connected with the fourth chamber through the pilot valve assembly, and the fourth chamber is unidirectionally communicated with the first valve port and the second valve port through the third passage.

[0014] In addition, the bidirectional pilot damping adjusting valve according to the embodiments of the present application can also have the following additional technical features:

[0015] In optional embodiments of the present application, the bidirectional pilot damping adjusting valve includes a first state and a second state, and the pilot valve assembly includes a pilot valve core and a spring seat, the pilot valve core being arranged in the spring seat in a floating manner;

[0016] In the first state, the damping oil flows out from the second valve port after passing through the first chamber from the first valve port, and the damping oil flows out from the first valve port after passing through the fourth chamber and the third passage after pushing away the pilot valve core from the third passage, the main body portion and the pilot valve core move in the same direction and generate a gap with the valve body after the pilot valve core is pushed away, and the damping oil can flow to the second valve port from the gap;

[0017] In the second state, the damping oil flows out from the first valve port after passing through the first chamber from the second valve port, and the damping oil flows out from the first valve port after passing through the fourth chamber and the third passage after pushing away the pilot valve core from the third passage, the main body portion and the pilot valve core move in the same direction and generate a gap with the valve body after the pilot valve core is pushed away, and the damping oil can flow to the first valve port from the gap.

[0018] In optional embodiments of the present application, the annular portion and the main body portion and the spring seat enclose the fourth chamber, and the pilot valve core can open and close the communication between the third chamber and the fourth chamber.

[0019] In optional embodiments of the present application, the driving assembly is an electromagnetic assembly, which comprises an electromagnet and an armature, the electromagnet is sleeved on the valve body, the armature is connected with the spring seat, and the armature is slidably arranged in the accommodating cavity.

[0020] In optional embodiments of the present application, the electromagnetic assembly further comprises an adjusting screw, the adjusting screw is connected in the valve body, the end of the adjusting screw is connected with the spring seat, and the travel of the pilot valve core can be adjusted by pushing the spring seat.

[0021] In optional embodiments of the present application, the spring seat comprises a first portion, a second portion, a third portion, a first spring and a second spring;

[0022] The first portion is sleeved on the first end of the pilot valve core, the first spring is sleeved on the pilot valve core and is located on the side of the first portion close to the main body portion, the second spring is sleeved and compressed between the first portion and the second portion, the second spring is located on the side of the first portion away from the first spring, and the third portion is sleeved outside the first portion and is used to drive the first portion to move, so as to adjust the length of the pilot valve core extending into the third chamber.

[0023] In optional embodiments of the present application, the valve body comprises a shell and a main valve seat, the main valve seat is arranged at the opening end of the shell, the second valve port is formed in the main valve seat, and the main body portion abuts against the main valve seat.

[0024] In optional embodiments of the present application, the main body portion further comprises a fourth channel, and the fourth chamber communicates with the first chamber and the first valve port in one way through the fourth channel.

[0025] In optional embodiments of the present application, the bidirectional pilot damping adjusting valve further comprises a float opening and closing assembly, the float opening and closing assembly comprises an opening and closing ball, an opening and closing spring and an opening and closing seat, and the opening and closing seat has a normally open port.

[0026] The normally open portion is provided with the float opening and closing assembly, the opening and closing seat is connected with the valve body and blocks the opening and closing ball, and the opening and closing ball and the valve body compress the opening and closing spring.

[0027] The main body part is provided with the floating ball opening and closing assembly, the opening and closing seat is connected to the side of the main body part away from the pilot valve assembly and blocks the opening and closing ball, and the opening and closing ball and the main body part compress the opening and closing spring.

[0028] The embodiment of the present application provides an electromagnetic valve type shock absorber, which comprises a shock absorbing cavity and the bidirectional pilot damping adjusting valve.

[0029] The embodiment of the present application has the following beneficial effects:

[0030] The bidirectional pilot damping adjusting valve of the present application can effectively solve the problems in the prior art by setting the main valve assembly and the pilot valve assembly to form two-stage pressure control and combining the driving assembly to realize differential pressure and flow regulation in the operation process. The shock absorber using the bidirectional pilot damping adjusting valve has a larger shock absorbing regulation range and a higher upper limit of shock absorbing pressure. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0032] Figure 1 The schematic diagram of the bidirectional pilot damping adjusting valve provided by the embodiment of the present application is shown in the figure;

[0033] Figure 2 The sectional view of the bidirectional pilot damping adjusting valve is shown in the figure; Figure 1

[0034] The local enlarged view of the A part of the bidirectional pilot damping adjusting valve is shown in the figure; Figure 3 Figure 2 The local enlarged view of the B part of the bidirectional pilot damping adjusting valve is shown in the figure;

[0035] Figure 4 Figure 2 The local enlarged view of the C part of the bidirectional pilot damping adjusting valve is shown in the figure;

[0036] Figure 5 The exploded view of the bidirectional pilot damping adjusting valve is shown in the figure; Figure 2

[0037] The schematic diagram of the main valve core is shown in the figure; Figure 6 Figure 1 The schematic diagram of the main valve core is shown in the figure;

[0038] Figure 7 The schematic diagram of the main valve core is shown in the figure;​​​

[0039] Figure 8 Schematic diagram of flow direction of damping oil liquid for compression stroke;

[0040] Figure 9 Schematic diagram of flow direction of damping oil liquid for compression stroke.

[0041] Icon: 100 - bidirectional pilot damping adjusting valve; 10 - valve body; 11 - first valve port; 12 - second valve port; 13 - always open part; 15 - housing; 17 - main valve seat; 20 - main valve assembly; 21 - main valve core; 211 - main body part; 2111 - first chamber; 2112 - second chamber; 2113 - third chamber; 2114 - fourth chamber; 2115 - first passage; 2116 - second passage; 2117 - third passage; 2118 - fourth passage; 212 - annular part; 30 - pilot valve assembly; 31 - pilot valve core; 32 - spring seat; 321 - first part; 322 - second part; 323 - third part; 324 - first spring; 325 - second spring; 40 - driving assembly; 41 - electromagnet; 42 - armature; 43 - power line; 44 - adjusting screw; 50 - float ball opening and closing assembly; 51 - opening and closing ball; 52 - opening and closing spring; 53 - opening and closing seat; 531 - always open port; 60 - sealing ring; 70 - threaded washer. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0044] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0045] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the product is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Embodiments

[0048] Please refer to Figures 1 to 7 The embodiments of the present application provide a bidirectional pilot damping regulating valve 100, which comprises:

[0049] A valve body 10, the valve body 10 has a containing cavity and a first valve port 11, a second valve port 12 and a constant passage part 13 (the constant passage part 13 of the present embodiment is a constant passage orifice) capable of communicating with the containing cavity;

[0050] A main valve assembly 20, the main valve assembly 20 comprises a main valve core 21, the main valve core 21 is arranged in the containing cavity, the main valve core 21 comprises a main body part 211 and an annular part 212, the annular part 212 is arranged on one side of the main body part 211, the main body part 211 and the valve body 10 form a first cavity 2111 and a second cavity 2112, the main body part 211 is provided with a third cavity 2113, a first passage 2115, a second passage 2116 and a third passage 2117;

[0051] A pilot valve assembly 30, the pilot valve assembly 30 and the annular part 212 and the main body part 211 form a fourth cavity 2114;

[0052] A driving assembly 40, the driving assembly 40 is used to drive the pilot valve assembly 30 to move, so as to adjust the volume of the fourth cavity 2114;

[0053] The first valve port 11 and the second valve port 12 are kept open by the first chamber 2111 and the first passage 2115, the second chamber 2112 and the third chamber 2113 are communicated by the second passage 2116, the third chamber 2113 is connected with the second valve port 12 in an openable and closable manner, the third chamber 2113 is connected with the fourth chamber 2114 in an openable and closable manner by the pilot valve assembly 30, and the fourth chamber 2114 is communicated with the first valve port 11 and the second valve port 12 in a one-way manner by the third passage 2117.

[0054] Briefly speaking, the pilot valve assembly 30 and the main valve assembly 20 enable two-stage control of the pressure of the shock absorber in the compression and rebound strokes, which can improve the adjustment range and make the adjustment process more smooth and stable, thereby improving the damping effect. Moreover, the driving assembly 40 can change the volume of the fourth chamber 2114, thereby controlling the flow rate of the damping oil, realizing continuous adjustment of the pressure, changing the pressure difference, and making the upper limit of the pressure adjustment higher. For example, the upper limit of the pressure of a general damping adjustment valve is 5, and the adjustment range of the pressure may be 1-3 or 2-4 when the structure is not adjusted, and the width of the adjustment range is 3 units. However, the structure of the present application can make the upper limit reach 10 by adjusting the volume of the fourth chamber 2114 by the driving assembly 40, and the width of the adjustment range may reach 6 units because the main valve assembly 20 and the pilot valve assembly 30 are two-stage adjustment, for example, the adjustment range may be 1-6 or may be changed to 4-10. The problems of the prior art are effectively improved. Of course, the examples herein only represent that the effect is improved, but the specific range of the improvement can be designed and manufactured according to actual needs, and it is not required to be the numerical range of the examples.

[0055] The valve body 10 includes an outer shell 15 and a main valve seat 17, the main valve seat 17 is arranged at one end of the outer shell 15, the second valve port 12 is formed in the main valve seat 17, and the main body 211 abuts against the main valve seat 17. When the entire bidirectional pilot damping adjustment valve 100 is not working, the damping oil can only flow from the first passage 2115 through the cooperation between the main body 211 and the main valve seat 17, and when the bidirectional pilot damping adjustment valve 100 is working, the main body 211 moves and generates a gap with the main valve seat 17, so that the damping oil can flow from the first passage 2115 and the gap at the same time.

[0056] Please continue to combine Figure 7The main body 211 of the present application further comprises a fourth channel 2118, the fourth chamber 2114 is in one-way communication with the first chamber 2111 and the first valve port 11 through the fourth channel 2118. The fourth channel 2118 and the third channel 2117 above are both shown by thick dashed lines. The second channel 2116 above is shown by thick double-dot dashed lines, the second channel 2116 and the third channel 2117 and the fourth channel 2118 do not directly cross and communicate, but communicate through the third chamber 2113 and the fourth chamber 2114.

[0057] It can be understood that the structure of the fourth channel 2118 is similar to that of the third channel 2117, and a one-way valve piece is arranged at the outlet of the channel. For example Figure 6 The outlet H of the third channel 2117 can be blocked by the corresponding one-way valve piece S, which is fixed to the outside of the outlet H by a threaded washer 70 during assembly, and the threaded washer 70 is connected with the opening and closing seat 53 (to be described below) at this position. In this way Figure 7 For example, the angle of view shown makes the damping oil flow only from right to left. Of course, the third channel 2117 also has another outlet G, which is similar in structure to the outlet L of the fourth channel 2118, and both are provided with a one-way valve piece (the one-way valve pieces at the outlets G and L are hidden in the figure) on the outside, so that the damping oil can only overflow from the inside to the outside.

[0058] The bidirectional pilot damping adjusting valve 100 further comprises a floating ball opening and closing assembly 50, the floating ball opening and closing assembly 50 comprises an opening and closing ball 51, an opening and closing spring 52 and an opening and closing seat 53, the opening and closing seat 53 has a normally open port 531;

[0059] The normally open part 13 is provided with the floating ball opening and closing assembly 50, the opening and closing seat 53 is connected to the valve body 10 and blocks the opening and closing ball 51, and the opening and closing ball 51 and the valve body 10 compress the opening and closing spring 52;

[0060] The main body 211 is provided with the floating ball opening and closing assembly 50, the opening and closing seat 53 is connected to the side of the main body 211 away from the pilot valve assembly 30 and blocks the opening and closing ball 51, and the opening and closing ball 51 and the main body 211 compress the opening and closing spring 52.

[0061] It should be noted that the floating ball opening and closing assembly 50 here is only the same in the type of basic components, and does not limit that the floating ball opening and closing assemblies 50 used by the normally open part 13 and the main body 211 must be completely consistent in specifications and shapes, and each corresponding design can be made according to the installation position and the opening and closing effect to be achieved.

[0062] Further, the always-open port 531 of the opening and closing seat 53 facilitates the circulation of damping oil. Since the opening and closing ball 51 blocks the circulation, the damping oil can only flow from the always-open port 531 of the opening and closing seat 53 to the direction of the opening and closing ball 51, and cannot flow in the opposite direction. For example, in the third chamber 2113, the damping oil can only flow from left to right.

[0063] Based on the bidirectional pilot damping adjusting valve 100, the embodiment of the present application provides an electromagnetic valve type shock absorber, which comprises a damping chamber and the bidirectional pilot damping adjusting valve 100. The bidirectional pilot damping adjusting valve 100 is arranged in the damping chamber and divides the damping chamber into a first damping chamber and a second damping chamber. The first valve port 11 is in communication with the first damping chamber, and the second valve port 12 is in communication with the second damping chamber.

[0064] The first damping chamber and the second damping chamber can be the rebound chamber and the compression chamber of a general shock absorber.

[0065] The pilot valve assembly 30 of the present application comprises a pilot valve core 31 and a spring seat 32. The pilot valve core 31 is arranged in the spring seat 32 in a floating manner. Specifically, the fourth chamber 2114 of the present embodiment is enclosed by the annular portion 212 and the main body portion 211 and the spring seat 32. The pilot valve core 31 can open and close the communication between the third chamber 2113 and the fourth chamber 2114. It can be understood that when the dynamic seal between the main body portion 211 and the valve body 10 is reliable, the annular portion 212 can also be replaced by the inner wall of the valve body 10, that is, the annular portion 212 can be removed according to the sealing condition. It can be understood that at this time, part of the inner wall of the valve body 10 is substantially equivalent to the annular portion 212 described above. Therefore, the annular portion 212 is not limited to being arranged only on the main valve core 21. Even if part of the inner wall of the valve body 10 replaces the annular portion 212, it can also be regarded as a part of the main valve core 21, which is only arranged separately.

[0066] Please refer to Figure 1 and Figure 5 The driving assembly 40 of the present embodiment is an electromagnetic assembly, which comprises an electromagnet 41 and an armature 42. The electromagnet 41 is sleeved on the valve body 10, and the armature 42 is connected with the spring seat 32 (specifically connected with the third portion 323 described below). The armature 42 is arranged in the accommodating cavity in a slidable manner. The power line 43 of the electromagnet 41 is connected to the housing 15.

[0067] The electromagnetic assembly further comprises an adjusting screw 44, which is connected in the valve body 10. The end of the adjusting screw 44 is connected to the spring seat 32, and the adjusting screw 44 can adjust the stroke of the pilot valve core 31 by pushing the spring seat 32.

[0068] In the present embodiment, the spring seat 32 comprises a first portion 321, a second portion 322, a third portion 323, a first spring 324 and a second spring 325.

[0069] The first part 321 is sleeved on the first end of the pilot spool 31, the first spring 324 is sleeved on the pilot spool 31 and is located on the side of the first part 321 close to the main body part 211, the second spring 325 is sleeved and compressed between the first part 321 and the second part 322, the second spring 325 is located on the side of the first part 321 away from the first spring 324, and the third part 323 is sleeved on the outer side of the first part 321 and is used to drive the first part 321 to move, so as to adjust the length of the pilot spool 31 extending into the third chamber 2113. The adjusting screw 44 directly abuts against the second part 322, by screwing the adjusting screw 44, the position of the second part 322 in the axial direction of the adjusting screw 44 can be changed, the axial position of the first part 321 can be changed through the force transmission of the second spring 325, and thus the size of the fourth chamber can be changed, the flow regulation function is achieved, the pressure regulation range is changed. In addition, since the position of the first part 321 is changed, the compression amount of the first spring 324 is changed, and then the difficulty of the shock absorbing oil liquid entering from the third chamber 2113 into the fourth chamber 2114 is changed, and then the shock absorbing oil liquid transmission speed and pressure can be changed, so that the pressure regulation and flow regulation in the shock absorbing process are more controllable, and the kinetic balance in the running process is more easily achieved.

[0070] The principle of the embodiment is:

[0071] Please refer to Figure 8 and Figure 9 , the bidirectional pilot damping adjusting valve 100 of the application includes a first state and a second state;

[0072] In the first state, the shock absorbing oil liquid flows out from the second valve port 12 after passing through the first chamber 2111 from the first valve port 11, and the shock absorbing oil liquid flows out from the second valve port 12 after passing through the fourth chamber 2114, the third passage 2117 from the second chamber 2112, the third chamber 2113 and the third passage 2117 in sequence from the constant-through part 13, after pushing away the pilot spool 31, the main body part 211 moves in the same direction with the pilot spool 31 and generates a gap with the valve body 10, and the shock absorbing oil liquid can flow to the second valve port 12 from the gap;

[0073] In the second state, the shock absorbing oil liquid flows out from the first valve port 11 after passing through the first chamber 2111 from the second valve port 12, and the shock absorbing oil liquid flows out from the first valve port 11 after passing through the fourth chamber 2114, the third passage 2117 from the third passage 2117 after pushing away the pilot spool 31, after the pilot spool 31 is pushed away, the main body part 211 moves in the same direction with the pilot spool 31 and generates a gap with the valve body 10, and the shock absorbing oil liquid can flow to the first valve port 11 from the gap.

[0074] Specifically, the first state corresponds to the recovery stroke state of the bidirectional pilot damping adjusting valve 100 in the recovery process of the shock absorber, and the second state is the state corresponding to the compression stroke. A sealing ring 60 is arranged outside the valve body 10 to prevent leakage of the damping oil.

[0075] In detail, in the recovery stroke of the electromagnetic valve type shock absorber, the bidirectional pilot damping adjusting valve 100 enters the first state, the first valve port 11 serves as the inlet of the recovery stroke, and when the damping oil enters the first chamber 2111, the damping oil can only flow from the first channel 2115 to the second valve port 12 at this time because the outlets of the third channel 2117 and the fourth channel 2118 on the main valve core 21 are provided with one-way valve pieces, and a first-stage pressure control (referred to as a main valve stage) is formed between the main valve core 21 and the main valve seat 17. In the recovery stroke, the damping oil will also enter the second chamber 2112 by pushing away the opening and closing ball 51 at the position of the always-open part 13, and the opening and closing ball 51 needs to overcome the action force of the opening and closing spring 52 to be pushed away, which generates a certain damping, and then after entering the third chamber 2113 through the second channel 2116, the damping oil needs to further overcome the action force of the first spring 324 and the second spring 325 to push away the pilot valve core 31, which also generates a certain damping, forming a second-stage pressure control (referred to as a pilot stage). Then the damping oil enters the fourth chamber 2114 from the third chamber 2113, and flows out to the second valve port 12 by pushing away the one-way valve piece at the outlet of the third channel 2117. When the pilot valve core 31 moves, the force acting on the main valve core 21 changes, so that the main valve core 21 can move in the same direction as the pilot valve core 31, and a gap is formed between the main valve core 21 and the main valve seat 17, so that the damping oil can flow from there to the second valve port 12, increasing the flow of the main valve stage and improving the upper limit of the pressure control.

[0076] In detail, in the compression stroke of the electromagnetic valve type shock absorber, because of the existence of the one-way valve piece S, part of the damping oil flows from the second valve port 12 to the first valve port 11 through the first channel 2115, forming the main valve stage pressure control. Another part of the oil pushes away the opening and closing ball 51 through the hole of the opening and closing seat 53 arranged on the main valve core 21, enters the third chamber 2113 after overcoming the opening and closing spring 52, and pushes away the pilot stage to enter the fourth chamber 2114, forming the pilot stage pressure control. Similarly, after the pilot valve core 31 is pushed away, the main valve core 21 also moves in the same direction, forming a gap with the main valve seat 17, so that the flow directly from the second valve port 12 to the first valve port 11 increases, improving the upper limit of the pressure control of the main valve stage.

[0077] It should be noted that when the flow rate flowing in is constant, the spring force, hydraulic pressure, hydrodynamic force, friction force, etc. will be in a balanced state after the pilot valve core 31 moves a certain displacement during the operation of the bidirectional pilot damping adjusting valve 100, and the hydraulic pressure and hydrodynamic force acting on the left and right of the main valve core 21 will also be in a balanced state.

[0078] It should be noted that the difference between the displacement of the pilot valve and the displacement of the main valve core 21 is the pilot stage flow area value, so the displacement of the main valve core 21 is also controlled by the spring force.

[0079] When the power line 43 supplies power to the electromagnet 41, the armature 42 receives a right electromagnetic force, and the armature 42 is connected to the pilot valve core 31, so the pilot valve core 31 also receives an electromagnetic force. Due to the addition of the electromagnetic force, the force relationship changes, and the set pressure of the damping adjusting valve also changes. It can play a role in adjusting the set pressure of the bidirectional pilot damping adjusting valve 100 to adjust the damping force of the shock absorber.

[0080] The bidirectional damping adjusting valve can form a two-stage pressure control device through the main valve assembly 20 and the pilot valve assembly 30 during use in the recovery and compression strokes, and during pressure control, the electromagnetic assembly can drive the pilot valve assembly 30 to move in the valve body 10, thereby controlling the flow of the third chamber 2113 and the fourth chamber 2114, continuously adjusting the pressure of the fourth chamber 2114, and achieving the effect of adjustable differential pressure and flow, so as to realize kinetic balance during operation, thereby achieving the effect of improving the pressure regulating range and set pressure properties in the two strokes.

[0081] In addition, since the main valve core 21 is indirectly affected by the spring force, it does not have a direct spring resistance, so after the pilot valve core 31 moves, it can move more quickly with the pilot valve core 31, generate a gap, and the corresponding damping adjustment is faster. And the spring on one side is more prone to damage than the main valve core 21, with a short service life, which affects the service life of the entire adjusting valve. By removing the direct-acting spring outside the main valve core 21, the problem of reducing the service life of the main valve assembly 20 due to the short service life of the spring itself can be avoided.

[0082] In summary, the bidirectional pilot damping adjusting valve 100 of the present application forms a two-stage pressure control through the main valve assembly 20 and the pilot valve assembly 30, and combines the driving assembly 40 to realize differential pressure and flow regulation during operation, which can effectively solve the problems of the prior art. The shock absorber using the bidirectional pilot damping adjusting valve 100 has a larger damping adjustment range and a higher upper limit of the damping pressure.

[0083] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A bidirectional pilot-operated damping regulating valve, characterized in that, include: A valve body having a receiving cavity and a first valve port, a second valve port, and a normally open portion that can communicate with the receiving cavity; A main valve assembly, the main valve assembly including a main valve core disposed in the receiving cavity, the main valve core including a main body and an annular part, the annular part being disposed on one side of the main body, the main body and the valve body forming a first chamber and a second chamber, the main body being provided with a third chamber, a first channel, a second channel and a third channel; A pilot valve assembly, wherein the pilot valve assembly, the annular portion, and the main body portion form a fourth chamber; A drive assembly for moving the pilot valve assembly to adjust the volume of the fourth chamber; Wherein, the first valve port and the second valve port are kept normally open through the first chamber and the first channel, the second chamber and the third chamber are connected through the second channel, the third chamber is connected to the second valve port in an open-closed manner, the third chamber is connected to the fourth chamber in an open-closed manner through the pilot valve assembly, and the fourth chamber is unidirectionally connected to the first valve port and the second valve port through the third channel; The bidirectional pilot damping regulating valve includes a first state and a second state. The pilot valve assembly includes a pilot valve core and a spring seat. The pilot valve core is floatingly disposed on the spring seat. In the first state, the damping oil flows from the first valve port through the first chamber and then out of the second valve port. The damping oil flows from the normally open part through the second chamber and the third chamber in sequence, and after pushing open the pilot valve core, it flows through the fourth chamber and the third channel out of the second valve port. After the pilot valve core is pushed open, the main body moves in the same direction as the pilot valve core and creates a gap with the valve body, allowing the damping oil to flow from the gap to the second valve port. In the second state, the damping oil flows out of the first valve port after passing through the first chamber from the second valve port. The damping oil then flows out of the first valve port after pushing the pilot valve core open through the third channel, passing through the fourth chamber and the third channel. After the pilot valve core is pushed open, the main body moves in the same direction as the pilot valve core and creates a gap with the valve body, allowing the damping oil to flow from the gap to the first valve port.

2. The bidirectional pilot-operated damping regulating valve according to claim 1, characterized in that, The annular portion, the main body portion, and the spring seat together form the fourth chamber, and the pilot valve core can open and close the connection between the third chamber and the fourth chamber.

3. The bidirectional pilot-operated damping regulating valve according to claim 1, characterized in that, The driving component is an electromagnetic component, which includes an electromagnet and an armature. The electromagnet is sleeved on the valve body, and the armature is connected to the spring seat. The armature is slidably disposed in the receiving cavity.

4. The bidirectional pilot-operated damping regulating valve according to claim 3, characterized in that, The electromagnetic component also includes an adjusting screw connected to the valve body, with its end connected to the spring seat, and capable of adjusting the stroke of the pilot valve core by pushing the spring seat.

5. The bidirectional pilot-operated damping regulating valve according to any one of claims 1-4, characterized in that, The spring seat includes a first part, a second part, a third part, a first spring, and a second spring; The first part is sleeved on the first end of the pilot valve core, the first spring is sleeved on the pilot valve core and located on the side of the first part closer to the main body, the second spring is sleeved and compressed between the first part and the second part, the second spring is located on the side of the first part away from the first spring, and the third part is sleeved on the outside of the first part and is used to drive the first part to move, so as to adjust the length of the pilot valve core extending into the third chamber.

6. The bidirectional pilot-operated damping regulating valve according to claim 1, characterized in that, The valve body includes a housing and a main valve seat. The main valve seat is located at one end of the housing opening, and the second valve port is formed in the main valve seat. The main body abuts against the main valve seat.

7. The bidirectional pilot-operated damping regulating valve according to claim 1, characterized in that, The main body also includes a fourth channel, and the fourth chamber is unidirectionally connected to the first chamber and the first valve port through the fourth channel.

8. The bidirectional pilot-operated damping regulating valve according to claim 1, characterized in that, The bidirectional pilot damping regulating valve also includes a float opening and closing assembly, which includes an opening and closing ball, an opening and closing spring, and an opening and closing seat, wherein the opening and closing seat has a normally open opening. The normally open section is provided with the float opening and closing assembly, the opening and closing seat is connected to the valve body and blocks the opening and closing ball, and the opening and closing ball and the valve body compress the opening and closing spring; The main body is provided with the float opening and closing assembly, and the opening and closing seat is connected to the side of the main body away from the pilot valve assembly and blocks the opening and closing ball. The opening and closing ball and the main body compress the opening and closing spring.

9. A solenoid valve type vibration damper, characterized in that, The device includes a vibration damping cavity and a bidirectional pilot damping regulating valve as described in any one of claims 1-8. The bidirectional pilot damping regulating valve is disposed in the vibration damping cavity and divides the vibration damping cavity into a first vibration damping cavity and a second vibration damping cavity. The first valve port is connected to the first vibration damping cavity, and the second valve port is connected to the second vibration damping cavity.

Images