Electromagnetic valve for controlling the damping of a shock absorber

Abstract

The application belongs to the technical field of shock absorber and relates to a control shock absorber damping electromagnetic valve. A magnetic core body spring (17) and a magnetic core body (3) are sequentially arranged in a valve sleeve subassembly (4), the magnetic core body spring (17) is clamped on one side of the magnetic core body (3), a front yoke sleeve (5) is arranged in the valve sleeve subassembly (4), thereby forming a press-fitting semi-finished product (22), a one-way spring (74), a one-way valve plate (72) are arranged in a valve core (71), the valve core (71) is connected with a valve cover (73), thereby forming a valve core subassembly (7), a flow valve plate (14), a supporting gasket (15), a magnetic core shaft (16), a valve core spring (13), a one-way spring (12), a one-way valve plate (11), the valve core subassembly (7), a control valve plate (10) and a one-way valve plate (8) are sequentially arranged in the front yoke sleeve (5) of the press-fitting semi-finished product (22). The control shock absorber damping electromagnetic valve can keep a large damping force in the case of power failure, reduce power consumption and still ensure safety.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of shock absorbers, and more particularly relates to an electromagnetic valve for controlling the damping of a shock absorber. BACKGROUND

[0002] A shock absorber is used to suppress the shock from the road surface and is widely used in vehicle shock absorption, plays a role in damping the vibration of the vehicle frame and body, improves the ride comfort of the vehicle and provides a good driving experience, and improves the comfort of the vehicle in driving. Although the shock absorbing spring can filter the vibration of the road surface during the driving of the vehicle, the shock absorbing spring itself will also have a reciprocating motion, and the shock absorber is used to suppress the jumping of the shock absorbing spring. The shock absorber is filled with oil, has two inner and outer chambers, and the oil can flow through the pores between the two chambers. A damping electromagnetic valve is installed at the position of the pore flow to control the damping force of the shock absorber. The built-in electromagnetic valve for controlling the damping force on the market is mostly in a reverse proportional control mode, that is, the greater the current, the smaller the damping force, and a large current is required for the constant soft mode (low damping force), which has a large power consumption.

[0003] The prior art has a technical field named "electromagnetic valve for adjusting the damping of a shock absorber" and a publication number "CN112815033A". The technology relates to the field of automobile parts and aims to solve the problem of complex valve body structure and large size in the prior art. It provides an electromagnetic valve for adjusting the damping of a shock absorber, which includes an electromagnetic drive subassembly and a valve body subassembly. The electromagnetic drive subassembly includes a housing subassembly. The end of the housing subassembly is provided with a stepped hole formed by concave. The valve body subassembly includes an outer valve sleeve. The outer valve sleeve is fixedly fitted in the stepped hole near one end of the housing subassembly. The outer periphery of the outer valve sleeve is provided with a first groove formed by concave, and the first groove and the inner periphery of the stepped hole form a first channel. The bottom surface of the outer valve sleeve is provided with a second groove that is radially connected to the inside and outside thereof, and the second groove and the bottom surface of the stepped hole form a second channel. The first channel is connected to the second channel to form a pilot valve oil outlet hole. The beneficial effects of the present application are that the structure is simpler, easy to process, the structure size can be set smaller, and the setting cost is also saved.

[0004] However, the technology does not involve the technical problems and technical solutions of the present application. SUMMARY

[0005] The technical problem to be solved by the present application is to provide an electromagnetic valve for controlling the damping of a shock absorber, which has a simple structure, adopts a proportional control mode, can maintain a large damping force in the case of power failure, reduces power consumption while ensuring safety, has a shorter overall length, can release more space for the stroke of the shock absorber, can increase the compression adjustment range, and can make the compression adjustment range reach the degree of the recovery adjustment range, and can improve the overall performance.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is:

[0007] The application is a kind of electromagnetic valve for controlling shock absorber damping, the magnetic core body spring and the magnetic core body are sequentially installed in the valve sleeve subassembly, the magnetic core body spring is clamped on one side of the magnetic core body, the front yoke sleeve is installed in the valve sleeve subassembly, forming a press-fitting semi-finished product, the one-way spring one and the one-way valve piece one are installed in the valve core, the valve core is connected with the valve cover, forming a valve core subassembly, the flow valve piece, the supporting gasket, the magnetic core shaft, the valve core spring, the one-way spring two, the one-way valve piece two, the valve core subassembly, the control valve piece and the one-way valve piece three are sequentially installed in the front yoke sleeve of the press-fitting semi-finished product, the valve sleeve subassembly of the press-fitting semi-finished product is connected with the adjusting limiting block, forming a press-fitting finished product, the electromagnetic valve for controlling shock absorber damping includes a reverse working energized state, a reverse working non-energized state, a forward working energized state and a forward working non-energized state.

[0008] The sealing gasket of the electromagnetic valve for controlling shock absorber damping is located in the valve sleeve subassembly, the solenoid subassembly is located outside the valve sleeve subassembly, the rear yoke sleeve is connected with the valve sleeve subassembly, the positioning pin fixes the circumferential angle between the rear yoke sleeve and the valve sleeve subassembly, ensures that the sealing gasket is seated on the flow hole of the rear yoke sleeve, and the sealing gasket is attached to the valve sleeve subassembly, the large sealing ring of the rear yoke sleeve and the small sealing ring of the rear yoke sleeve are located in the corresponding sealing ring installation ring groove on the outer side of the rear yoke sleeve.

[0009] The supporting gasket is arranged in the front yoke sleeve, and the valve core spring abuts against the flow valve piece, and the flow valve piece is close to the supporting gasket, the flow valve piece of the electromagnetic valve for controlling shock absorber damping is provided with a flow groove.

[0010] The valve sleeve subassembly of the electromagnetic valve for controlling shock absorber damping is provided with a PRebound1 port, the rear yoke sleeve is provided with a PRebound2 port, the valve core subassembly is provided with a center hole FXcenter and a flow hole, and the electromagnetic valve for controlling shock absorber damping is provided with a stress surface SA1, a stress surface SA2 and a T port.

[0011] The electromagnetic valve for controlling shock absorber damping includes a main flow channel, a pilot flow channel, an oil leakage flow channel and an opening.

[0012] The valve core subassembly includes a valve core, a one-way valve piece one, a valve cover and a one-way spring one.

[0013] When the electromagnetic valve for controlling the damping of the shock absorber is in the reverse working energized state, the medium enters from the PRebound1 port and the PRebound2 port. When the medium enters from the PRebound1 port and the PRebound2 port, the medium acting on the stress surface SA1 enters from the PRebound1 port, passes through the outer side flow-through hole of the valve cover, opens the one-way valve two composed of the one-way spring two and the one-way valve piece two, acts on the stress surface SA2, and SA2>SA1. Then the medium enters the valve core subassembly through the side flow-through hole of the valve core, and under the action of the one-way valve one composed of the one-way spring one and the one-way valve piece one, the medium can only flow out through the center hole FXcenter of the valve core. The solenoid subassembly is energized, so that the magnetic core body generates an electromagnetic force in the closing direction of the electromagnetic valve, pushes the magnetic core shaft to block the center hole FXcenter of the valve core subassembly. At this time, the pressure PA1 of the stress surface SA1 = the pressure PA2 of the stress surface SA2. When PA2 increases to the extent that the magnetic core shaft is pushed away, the medium flows through the front yoke sleeve and the valve sleeve subassembly, opens the one-way valve three composed of the one-way valve piece three, and flows to the T port. This flow channel is a pilot flow channel, so PA2<PA1. When PA1*SA1>PA2*SA2, the control valve piece is pushed away, the main flow channel is opened, and the medium entering the PRebound1 port flows into the T port through the opening between the control valve piece and the adjusting limit block. The greater the current input to the solenoid subassembly, the higher the PA2 required to push away the magnetic core shaft, and the higher the PA1, which is proportional to the adjustment.

[0014] When the electromagnetic valve for controlling the damping of the shock absorber is in the reverse working de-energized state, when the medium enters from the PRebound1 port, the small spring force provided by the magnetic core body spring is not enough to overcome the hydraulic pressure brought by the medium, causing the magnetic core shaft to be pushed against the flow-through valve piece, and only the flow-through groove on the flow-through valve piece serves as a flow-through hole for oil leakage. At this time, the decrease of PA2 is controlled by the flow-through groove. When the flow-through area of the flow-through groove is smaller than the flow-through area of the pilot flow channel during energization, a larger PA1 is required to open the main flow channel during de-energization. At this time, the flow-through area of the flow-through groove of the control flow-through valve piece controls the size of PA1. The larger the flow-through area, the faster the PA2 pressure relief, the smaller the PA1. The smaller the flow-through area, the slower the PA2 pressure relief, and the larger the PA1. When a small flow-through area is used, the large damping force can be maintained in the case of energization failure.

[0015] When the control shock absorber damping electromagnetic valve is in the positive energization state, the medium enters from the Pcompre port, acts on the force receiving surface SB1, flows through the inner side flow passage hole of the valve cover, opens the one-way valve one composed of the one-way spring one and the one-way valve piece one, acts on the force receiving surface SA237 through the side flow passage hole of the valve core, and SA2>SB1; the solenoid subassembly is connected with the current, the magnetic core body generates the electromagnetic force in the electromagnetic valve closing direction, pushes the magnetic core shaft to block the center hole FXcenter34 of the valve core subassembly, at this time, the pressure PB1 of the SB1 surface=the pressure PA2 of the SA2 surface; when PA2 increases to the extent that the magnetic core shaft can be pushed, the magnetic core shaft 16 is pushed away, the medium flows through the front yoke sleeve, the magnetic core body, the valve sleeve subassembly and the rear yoke sleeve to the T port, which is the pilot flow channel 39, and PA2

[0016] When the control shock absorber damping electromagnetic valve is in the positive non-energization state, when the medium enters from the Pcompre port, the small spring force provided by the magnetic core body spring is insufficient to overcome the hydraulic pressure of the medium, so that the magnetic core shaft is pushed against the flow passage valve piece, only the flow passage groove on the flow passage valve piece is used as the flow passage hole to discharge oil, at this time, the decrease of PA2 is controlled by the flow passage groove, when the flow passage area of the flow passage groove is smaller than the flow passage area of the pilot flow channel in the energization state, then a larger PB1 is needed to open the main flow channel in the non-energization state; at this time, the flow passage area of the flow passage groove of the control flow passage valve piece 14 can control the size of PB1, the larger the flow passage area, the faster the PA2 pressure relief, the smaller the PB1, the smaller the flow passage area, the slower the PA2 pressure relief, and the larger the PB1; when the small flow passage area is used, the large damping force can be maintained in the energization failure condition.

[0017] The technical scheme of the present application has the following working principles and beneficial effects:

[0018] The control shock absorber damping electromagnetic valve can switch between various working states, including reverse working energized state, reverse working non-energized state, forward energized state and forward non-energized state. In the reverse working energized state, the greater the current flowing into the solenoid subassembly, the higher PA2 required to push away the magnetic core shaft, and the higher PA1, achieving a proportional regulation effect. In the reverse working non-energized state, when a smaller flow area is used, the larger damping force can be maintained in the case of energization failure. In the forward energized state, the greater the current flowing into the solenoid subassembly, the higher PA2 required to push away the magnetic core shaft, and the higher PB1, achieving a proportional regulation effect. In the forward non-energized state, when a smaller flow area is used, the larger damping force can be maintained in the case of energization failure. The control shock absorber damping electromagnetic valve has the advantages of simple structure, proportional control mode, larger damping force in the case of energization failure, reduced power consumption, ensured safety, shorter overall length, released space for shock absorber stroke, increased compression adjustment range, and improved overall performance. BRIEF DESCRIPTION OF DRAWINGS

[0019] The content expressed by each drawing of the present specification and the marks in the drawings are briefly described as follows:

[0020] Figure 1 The control shock absorber damping electromagnetic valve is shown in the structural schematic view.

[0021] Figure 2 The valve core subassembly of the control shock absorber damping electromagnetic valve is shown in the structural schematic view.

[0022] Figure 3 The control shock absorber damping electromagnetic valve is shown in the structural schematic view of the press-fitted semi-finished product.

[0023] Figure 4 The control shock absorber damping electromagnetic valve is shown in the structural schematic view of the press-fitted finished product.

[0024] Figure 5 The control shock absorber damping electromagnetic valve is shown in the structural schematic view of the reverse working state.

[0025] Figure 6 The control shock absorber damping electromagnetic valve is shown in the structural schematic view of the reverse working energized state.

[0026] Figure 7 The control shock absorber damping electromagnetic valve is shown in the structural schematic view of the reverse working non-energized state.

[0027] Figure 8Structure diagram of controlling positive working state of electromagnetic valve for shock absorber damping according to the present application;

[0028] Figure 9 Structure diagram of controlling positive working energized state of electromagnetic valve for shock absorber damping according to the present application;

[0029] Figure 10 Structure diagram of controlling positive working non-energized state of electromagnetic valve for shock absorber damping according to the present application;

[0030] In the drawing, the marks are respectively: 1, rear yoke sleeve; 2, solenoid subassembly; 3, magnetic core body; 4, valve sleeve subassembly; 5, front yoke sleeve; 6, valve sleeve sealing ring; 7, valve core subassembly; 71, valve core; 72, one-way valve piece one; 73, valve cover; 74, one-way spring one; 8, one-way valve piece three; 9, adjusting limit block; 10, control valve piece; 11, one-way valve piece two; 12, one-way spring two; 13, valve core spring; 14, flow-through valve piece; 15, support gasket; 16, magnetic core shaft; 17, magnetic core body spring; 18, sealing gasket; 19, rear yoke sleeve large sealing ring; 20, rear yoke sleeve small sealing ring; 21, positioning pin; 22, press-fitting semi-finished product; 23, press-fitting finished product; 31, PRebound1 port; 32, PRebound2 port; 34, center hole FXcenter; 35, flow-through hole; 36, stress surface SA1; 37, stress surface SA2; 38, main flow passage; 39, pilot flow passage; 40, oil leakage flow passage; 43, Pcompre port; 44, stress surface SB1. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application and the shapes, structures, mutual positions and connection relationships between the parts, functions and working principles of the parts involved will be further described in detail below by comparing the drawings and describing the embodiments:

[0032] As shown in the drawings Figure 1 -As shown in the drawings Figure 4The application is a control shock absorber damping electromagnetic valve, the magnetic core body spring 17 and the magnetic core body 3 are sequentially arranged in the valve sleeve subassembly 4, the magnetic core body spring 17 is clamped on one side of the magnetic core body 3, the front yoke sleeve 5 is arranged in the valve sleeve subassembly 4, and a pressure assembly semi-finished product 22 is formed, the one-way spring 74 and the one-way valve piece 72 are arranged in the valve core 71, the valve core 71 is connected with the valve cover 73, and a valve core subassembly 7 is formed, the flow valve piece 14, the supporting gasket 15, the magnetic core shaft 16, the valve core spring 13, the one-way spring 12, the one-way valve piece 11, the valve core subassembly 7, the control valve piece 10 and the one-way valve piece 8 are sequentially arranged in the front yoke sleeve 5 of the pressure assembly semi-finished product 22, and the valve sleeve subassembly 4 of the pressure assembly semi-finished product 22 is connected with the adjusting limiting block 9, and a pressure assembly finished product 23 is formed. The control shock absorber damping electromagnetic valve comprises a reverse working energized state, a reverse working non-energized state, a forward working energized state and a forward working non-energized state. The above structure improves the technical scheme for the deficiencies in the prior art. The control shock absorber damping electromagnetic valve can switch between various working states, including a reverse working energized state, a reverse working non-energized state, a forward working energized state and a forward working non-energized state. In the reverse working energized state, the greater the current flowing into the solenoid subassembly 2, the higher the PA2 required to push away the magnetic core shaft 16, and the higher the PA1, achieving a positive proportional adjustment effect. In the reverse working non-energized state, when a smaller flow area is used, the larger damping force can be maintained in the case of energization failure. In the forward working energized state, the greater the current flowing into the solenoid subassembly 2, the higher the PA2 required to push away the magnetic core shaft 16, and the higher the PB1, achieving a positive proportional adjustment effect. In the forward working non-energized state, when a smaller flow area is used, the larger damping force can be maintained in the case of energization failure. The control shock absorber damping electromagnetic valve has the advantages of simple structure, positive proportional control mode, larger damping force in the case of energization failure, reduced power consumption, ensured safety, shorter overall length, released space for shock absorber stroke, increased compression adjustment range, achieved compression adjustment range to the extent of recovery adjustment range, and improved overall performance.

[0033] The sealing gasket 18 of the control shock absorber damping solenoid valve is located in the valve sleeve subassembly 4, the solenoid subassembly 2 is located outside the valve sleeve subassembly 4, the rear yoke sleeve 1 is connected to the valve sleeve subassembly 4, the positioning pin 21 fixes the circumferential angle of the rear yoke sleeve 1 and the valve sleeve subassembly 4, ensures that the sealing gasket 18 is located on the flow-through hole 35 of the rear yoke sleeve 1, and the sealing gasket 18 is attached to the valve sleeve subassembly 4, the rear yoke sleeve large sealing ring 19 and the rear yoke sleeve small sealing ring 20 are located in the corresponding sealing ring mounting ring groove outside the rear yoke sleeve 1. The front yoke sleeve 5 is provided with a support gasket 15, and the valve core spring 13 abuts against the flow-through valve piece 14, and the flow-through valve piece 14 is close to the support gasket 15. The flow-through valve piece 14 of the control shock absorber damping solenoid valve is provided with a flow-through groove. The above structure limits the specific structure of the solenoid valve, forms a special solenoid valve structure, and solves the technical problems.

[0034] When the control shock absorber damping solenoid valve is formed, the magnetic core body spring 17 and the magnetic core body 3 are sequentially placed in the valve sleeve subassembly 4, and then the front yoke sleeve 5 is screwed / pressed to form a press-fitting semi-finished product 22, and the front yoke sleeve 5 is screwed / interference fitted with the valve sleeve subassembly 4; the one-way spring 74 and the one-way valve piece 72 are placed in the valve core 71, and then the valve cover 73 is screwed / pressed to form the valve core subassembly 7, and the valve cover 73 is screwed / interference fitted with the valve core 71; the flow-through valve piece 14, the support gasket 15, the magnetic core shaft 16, the valve core spring 13, the one-way spring 12, the one-way valve piece 11, the valve core subassembly 7, the control valve piece 10, and the one-way valve piece 8 are sequentially placed in the press-fitting semi-finished product 22, and then the adjusting limiting block 9 is screwed / pressed, and then the valve sleeve sealing ring 6 is sleeved to form a press-fitting finished product 23, and the adjusting limiting block 9 is screwed / interference fitted with the press-fitting semi-finished product 22; and then the sealing gasket 18, the solenoid subassembly 2, the rear yoke sleeve 1, the rear yoke sleeve large sealing ring 19, and the rear yoke sleeve small sealing ring 20 are sequentially sleeved from the fine end of the press-fitting finished product 23 to form the solenoid valve assembly.

[0035] The valve sleeve subassembly 4 of the control shock absorber damping solenoid valve is provided with a PRebound1 port 31, the rear yoke sleeve 1 is provided with a PRebound2 port 32, the valve core subassembly 7 is provided with a center hole FXcenter 34 and a flow-through hole 35, and the control shock absorber damping solenoid valve is provided with a stress surface SA1 36, a stress surface SA2 37, and a T port. The shock absorber damping solenoid valve comprises a main flow channel 38, a pilot flow channel 39, an oil leakage flow channel 40, and an opening. The valve core subassembly 7 comprises a valve core 71, a one-way valve piece 72, a valve cover 73, and a one-way spring 74. The structure of the one-way valve 1, the one-way valve 2, and the one-way valve 3 can separate the flow channels of forward working and reverse working, and they do not affect each other.

[0036] The shock absorber damping solenoid valve can switch between multiple working states.

[0037] As shown in the accompanying drawings Figure 5- attached Figure 7 As shown in the figure, when the shock absorber damping electromagnetic valve is in reverse working energized state, the medium enters from PRebound1 port 31 and PRebound2 port 32. When the medium enters from PRebound1 port 31 and PRebound2 port 32, the medium acting on force surface SA1 136 passes through the outer side flow-through hole of valve cover 73, opens the one-way valve two composed of one-way spring two 12 and one-way valve piece two 11, acts on force surface SA2 137, SA2>SA1; then enters the inside of valve core subassembly 7 through the side flow-through hole of valve core 71, and under the action of the one-way valve one composed of one-way spring one 74 and one-way valve piece one 72, the medium can only flow out through the center hole FXcenter 34 of valve core 71; the solenoid subassembly 2 passes current, so that the magnetic core body 3 generates electromagnetic force in the closing direction of the electromagnetic valve, pushes the magnetic core shaft 16 to block the center hole FXcenter 34 of valve core subassembly 7, at this time the pressure PA1 of force surface SA1 136=the pressure PA2 of force surface SA2 137; when PA2 increases to the extent that the magnetic core shaft 16 can be pushed away, the magnetic core shaft 16 is pushed away, the medium flows through the front yoke sleeve 5, valve sleeve subassembly 4, opens the one-way valve three composed of one-way valve piece three 8, and flows to T port, this flow channel is pilot flow channel 39, then PA2<PA1; when PA1*SA1>PA2*SA2, the control valve piece 10 is pushed away, the main flow channel 38 is opened, and the medium entering from PRebound1 port 31 flows into T port through the opening between control valve piece 10 and adjusting limit block 9; the greater the current passing through the solenoid subassembly 2, the higher the PA2 required to push away the magnetic core shaft 16, and the higher the PA1, which achieves proportional adjustment.

[0038] When the control shock absorber damping electromagnetic valve is in reverse working de-energized state, when the medium enters from PRebound1 port 31, the small spring force provided by magnetic core body spring 17 is not enough to overcome the hydraulic pressure brought by the medium, causing the magnetic core shaft 16 to be pushed against flow-through valve piece 14, and only the flow-through groove on flow-through valve piece 14 serves as a flow-through hole for oil leakage, at this time the decrease of PA2 is controlled by the flow-through groove, and when the flow-through area of the flow-through groove is smaller than the flow-through area of pilot flow channel 39 in energized state, a larger PA1 is required to open the main flow channel 38 in de-energized state; at this time, the flow-through area of the flow-through groove of control flow-through valve piece 14 controls the size of PA1, the larger the flow-through area, the faster the PA2 pressure relief, the smaller the PA1, the smaller the flow-through area, the slower the PA2 pressure relief, and the larger the PA1; when a small flow-through area is used, it can maintain a large damping force in the case of energization failure.

[0039] As attached Figure 8 - attached Figure 10As shown, when the medium enters from Pcompre port 43, the small spring force provided by the magnetic core body spring 17 is not enough to overcome the hydraulic pressure of the medium, causing the magnetic core shaft 16 to be pushed against the flow-through valve plate 14, and only the flow-through groove on the flow-through valve plate 14 serves as a flow-through hole for oil discharge. At this time, the decrease of PA2 is controlled by the flow-through groove. When the flow-through area of the flow-through groove is smaller than the flow-through area of the pilot flow passage 39 during energization, a larger PB1 is required to open the main flow passage 38. At this time, the flow-through area of the flow-through groove of the control flow-through valve plate 14 can control the size of PB1. The larger the flow-through area, the faster the PA2 pressure relief, the smaller the PB1. The smaller the flow-through area, the slower the PA2 pressure relief, and the larger the PB1. When a small flow-through area is used, a large damping force can be maintained in the case of energization failure.

[0040] As shown, when the medium enters from Pcompre port 43, the small spring force provided by the magnetic core body spring 17 is not enough to overcome the hydraulic pressure of the medium, causing the magnetic core shaft 16 to be pushed against the flow-through valve plate 14, and only the flow-through groove on the flow-through valve plate 14 serves as a flow-through hole for oil discharge. At this time, the decrease of PA2 is controlled by the flow-through groove. When the flow-through area of the flow-through groove is smaller than the flow-through area of the pilot flow passage 39 during energization, a larger PB1 is required to open the main flow passage 38. At this time, the flow-through area of the flow-through groove of the control flow-through valve plate 14 can control the size of PB1. The larger the flow-through area, the faster the PA2 pressure relief, the smaller the PB1. The smaller the flow-through area, the slower the PA2 pressure relief, and the larger the PB1. When a small flow-through area is used, a large damping force can be maintained in the case of energization failure.

[0041] The control shock absorber damping electromagnetic valve of the present application has the following innovative points: 1. The electromagnetic valve has a proportional regulation effect, i.e. the greater the current, the greater the opening pressure of the electromagnetic valve; 2. In the non-energized state, the electromagnetic valve controls the size of the flow-through area of the flow-through groove of the control flow-through valve plate 14 to achieve the size of the damping force in the case of energization failure; 3. The electromagnetic valve has a pilot structure in both forward and reverse directions, and can control a larger pressure with a smaller electromagnetic force; 4. The structures of the first, second and third one-way valves separate the flow passages in the forward and reverse directions, and do not affect each other.

[0042] The application is described above with reference to the drawings, and it is obvious that the specific implementation of the application is not limited by the above manner, as long as various improvements are made by using the method concept and technical scheme of the application, or the concept and technical scheme of the application is directly applied to other occasions without improvement, which is within the protection scope of the application.

Claims

1. A solenoid valve for controlling damping of a shock absorber, characterized by: Magnetic core body spring (17), magnetic core body (3) are in turn loaded into valve sleeve subassembly (4), magnetic core body spring (17) is clamped in one side of magnetic core body (3), front yoke sleeve (5) is installed in valve sleeve subassembly (4), constitute press-fit semi-finished product (22), one-way spring one (74), one-way valve piece one (72) are loaded into valve core (71), valve core (71) is connected with valve cover (73), constitute valve core subassembly (7), flow-through valve piece (14), support gasket (15), magnetic core shaft (16), valve core spring (13), one-way spring two (12), one-way valve piece two (11), valve core subassembly (7), control valve piece (10), one-way valve piece three (8) are in turn loaded into the front yoke sleeve (5) of press-fit semi-finished product (22), the valve sleeve subassembly (4) of press-fit semi-finished product (22) is connected with adjusting limit block (9), constitute press-fit finished product (23), the shock absorber damping electromagnetic valve includes reverse working energized state, reverse working non-energized state, positive working energized state and positive working non-energized state; The valve sleeve subassembly (4) of the control shock absorber damping electromagnetic valve is provided with PRebound1 port (31), the rear yoke sleeve (1) is provided with PRebound2 port (32), the valve core subassembly (7) is provided with center hole FXcenter (34) and flow-through hole (35), and the control shock absorber damping electromagnetic valve is provided with stress surface SA1 (36), stress surface SA2 (37) and T port; The shock absorber damping electromagnetic valve includes main flow channel (38), pilot flow channel (39), oil leakage flow channel (40) and opening; The shock absorber damping electromagnetic valve is in reverse working energized state, medium enters from PRebound1 port (31) and PRebound2 port (32), when medium enters from PRebound1 port (31) and PRebound2 port (32), the medium from PRebound1 port (31) acts on the force surface SA1 (36), passes through the outer side flow-through hole of the valve cover (73), opens the one-way valve two composed of one-way spring two (12) and one-way valve piece two (11), acts on the force surface SA2 (37), SA2>SA1;Then pass through the side flow-through hole of the valve core (71) into the valve core subassembly (7), under the action of the one-way valve one composed of one-way spring one (74) and one-way valve piece one (72), the medium can only flow out through the center hole FXcenter (34) of the valve core (71); The solenoid subassembly (2) passes through the current, so that the magnetic core body (3) generates the electromagnetic force in the electromagnetic valve closing direction, pushes the magnetic core shaft (16) to block the center hole FXcenter (34) of the valve core subassembly (7), at this time the pressure PA1 of the force surface SA1 (36) = the pressure PA2 of the force surface SA2 (37); When PA2 increases to the extent that the magnetic core shaft (16) is pushed open, the medium flows through the front yoke sleeve (5), the valve sleeve subassembly (4), opens the one-way valve three composed of one-way valve piece three (8) and flows to T port, this flow channel is the pilot flow channel (39), then PA2 <PA1;When PA1*SA1>PA2*SA2, the control valve piece (10) is pushed open, the main flow channel (38) is opened, the medium entering the PRebound1 port (31) flows into the T port through the opening between the control valve piece (10) and the adjusting limit block (9); The greater the current passing through the solenoid subassembly (2), the higher the PA2 required to push open the magnetic core shaft (10), the higher the PA1, and the positive proportional regulation is achieved; The shock absorber damping electromagnetic valve in the positive energization state, when the medium enters from Pcompre port (43), acts on the force surface SB1 (44), flows through the inner side flow-through hole of the valve cover (73), opens the one-way valve one composed of the one-way spring one (74) and the one-way valve piece one (72), acts on the force surface SA2 (37) through the side flow-through hole of the valve core (71), and SA2>SB1; the solenoid subassembly (2) is connected with current, so that the magnetic core body (3) generates electromagnetic force in the closing direction of the electromagnetic valve, pushes the magnetic core shaft (16) to block the center hole FXcenter (34) of the valve core subassembly (7), at this time, the pressure PB1 of the SB1 surface = the pressure PA2 of the SA2 surface; when PA2 increases to the extent that the magnetic core shaft (16) is pushed away, the medium flows through the front yoke sleeve (5), the magnetic core body (3), the valve sleeve subassembly (4) and the rear yoke sleeve (1) to T port, which is the pilot flow channel (39), and then PA2 < PB1; when PB1*SB1>PA2*SA2, the control valve piece (10) is pushed away, the main flow channel (38) is opened, and the medium entering from the Pcompre port (43) flows into the T port through the opening between the control valve piece (10) and the valve cover (73); the greater the current connected to the solenoid subassembly (2), the higher the PA2 required to push away the magnetic core shaft (10), and the higher the PB1, so that the proportional regulation effect is achieved.

2. The control shock absorber damping solenoid valve according to claim 1, characterized by: The sealing gasket (18) of the control shock absorber damping electromagnetic valve is located in the valve sleeve subassembly (4), the solenoid subassembly (2) is located outside the valve sleeve subassembly (4), the rear yoke sleeve (1) is connected with the valve sleeve subassembly (4), the positioning pin (21) fixes the circumferential angle between the rear yoke sleeve (1) and the valve sleeve subassembly (4), ensures that the sealing gasket (18) is located on the flow-through hole (35) of the rear yoke sleeve (1), and the sealing gasket (18) is attached to the valve sleeve subassembly (4), and the rear yoke sleeve large sealing ring (19) and the rear yoke sleeve small sealing ring (20) are located in the corresponding sealing ring mounting ring grooves outside the rear yoke sleeve (1).

3. The control shock absorber damping solenoid valve according to claim 1 or 2, characterized in that: The front yoke sleeve (5) is provided with a support gasket (15), and the valve core spring (13) abuts against the flow-through valve piece (14), and the flow-through valve piece (14) is close to the support gasket (15).

4. The shock absorber damping solenoid valve according to claim 1 or 2, characterized by: The valve core subassembly (7) comprises a valve core (71), a one-way valve piece one (72), a valve cover (73) and a one-way spring one (74).

5. The shock absorber damping solenoid valve according to claim 4, characterized in that: The shock absorber damping electromagnetic valve is in reverse operation and is not powered, when the medium enters from PRebound1 (31), the small spring force provided by the magnetic core body spring (17) is not enough to overcome the hydraulic pressure brought by the medium, resulting in the magnetic core shaft (16) being pushed against the flow valve plate (14), only the flow channel of the flow valve plate (14) as a flow hole to discharge oil, at this time the drop of PA2 is controlled by the flow channel, when the flow area of the flow channel is smaller than the flow area of the pilot flow channel (39) when powered, then a larger PA1 is needed to open the main flow channel (38) without power; at this time, the flow area of the flow channel of the flow valve plate (14) controls the size of PA1, the larger the flow area, the faster the PA2 pressure relief, the smaller the flow area, the slower the PA2 pressure relief, and the larger the PA1; when a small flow area is used, a large damping force can be maintained in the case of power failure.

6. The shock absorber damping solenoid valve according to claim 4, characterized by: The shock absorber damping electromagnetic valve is in reverse operation and is not powered, when the medium enters from PRebound1 (31), the small spring force provided by the magnetic core body spring (17) is not enough to overcome the hydraulic pressure brought by the medium, resulting in the magnetic core shaft (16) being pushed against the flow valve plate (14), only the flow channel of the flow valve plate (14) as a flow hole to discharge oil, at this time the drop of PA2 is controlled by the flow channel, when the flow area of the flow channel is smaller than the flow area of the pilot flow channel (39) when powered, then a larger PA1 is needed to open the main flow channel (38) without power; at this time, the flow area of the flow channel of the flow valve plate (14) controls the size of PA1, the larger the flow area, the faster the PA2 pressure relief, the smaller the flow area, the slower the PA2 pressure relief, and the larger the PA1; when a small flow area is used, a large damping force can be maintained in the case of power failure.

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