Damping electromagnetic valve and shock absorber

Abstract

The utility model provides a damping electromagnetic valve and a shock absorber. The damping electromagnetic valve comprises a valve body part and a coil part. The valve body component comprises a valve shell, a main valve element assembly and a movable iron core assembly, the main valve element assembly comprises a main valve seat, a main valve element, a main valve sleeve and a main valve elastic piece. The two ends of the main valve elastic piece abut against the main valve element and the main valve sleeve respectively. The main valve seat and the main valve element are arranged on the main flow channel. The main valve element, the main valve sleeve, the movable iron core assembly and the valve shell jointly form a first guide flow channel. The movable iron core assembly moves in the length direction of the valve shell so as to adjust the flow of the first flow guide channel. The two ends of the main valve elastic piece directly abut against the main valve element and the main valve sleeve, a pilot valve element assembly is omitted, the mass of a moving piece in the damping electromagnetic valve is reduced, and under the action of electromagnetic force of the same level, the action response speed of the movable iron core assembly is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromagnetic valves, in particular to a damping electromagnetic valve and a shock absorber. BACKGROUND

[0002] When the automobile is running, the wheels will jump up and down with the uneven road surface, the springs in the chassis will absorb the jumping energy between the vehicle body and the wheels and convert it into elastic potential energy and store it in the springs, and the shock absorber in the chassis provides damping force to attenuate the jumping and converts the elastic potential energy into heat energy and dissipates in the air, so as to ensure the stability of the automobile running. The traditional shock absorber adopts a piston structure and is filled with hydraulic oil, when the wheels jump, the piston moves up and down, the hydraulic oil flows back and forth between the two cavities through the designed throttle channel, different throttle channels will provide different damping forces, but the damping characteristics of the same model of shock absorber is basically fixed. When the damping force of the shock absorber is small, the ride comfort of the vehicle is good, but the handling is poor, on the contrary, if the damping force is large, the handling of the vehicle is good, but the comfort is poor.

[0003] With the increasing demand of users for comfort and handling, shock absorbers with damping electromagnetic valves have begun to appear. The working principle is to control the opening size of the damping electromagnetic valve throttle channel, different working currents correspond to different opening sizes, that is, damping forces, and thus achieve the effect of actively controlling the damping force. The existing damping electromagnetic valve usually adopts a pilot valve structure, which controls the opening of the main flow channel by controlling the opening of the pilot flow channel, thereby controlling the opening of the entire throttle channel.

[0004] However, the moving iron core assembly and the guide valve core of the traditional damping electromagnetic valve are separately arranged, and the mass of the moving iron core assembly and the guide valve core is large, under the action of the same level of electromagnetic force, the moving response speed of the separately arranged moving iron core assembly and the guide valve core is slow; at the same time, the guide valve core needs to abut against the moving iron core assembly, and the guide valve core is easy to absorb impurities in the hydraulic oil between the guide valve core and the moving iron core assembly, thereby causing the guide valve core to move and jam and poor sealing effect.

[0005] Therefore, it is necessary to provide an improved damping electromagnetic valve and shock absorber to solve the above problems. INVENTION CONTENTS

[0006] The present application provides a damping electromagnetic valve and shock absorber with light mass and fast response speed.

[0007] The application provides a damping electromagnetic valve, comprising a valve body component and a coil component; the valve body component comprises a valve shell, a main valve core assembly and a moving core assembly arranged in the valve shell, the main valve core assembly comprises a main valve seat, a main valve core, a main valve sleeve and a main valve elastic member, two ends of the main valve elastic member are respectively in abutment with the main valve core and the main valve sleeve; the main valve seat and the main valve core are arranged on a main flow channel, the main valve core, the main valve sleeve, the moving core assembly and the valve shell jointly form a pilot flow channel; the moving core assembly moves along the length direction of the valve shell to adjust the flow of the pilot flow channel.

[0008] Further, the pilot flow channel comprises a balance hole arranged on the main valve core and a receiving cavity arranged between the main valve core and the main valve sleeve; the moving core assembly comprises a moving core and a core shaft assembly penetrating through the moving core, the pilot flow channel comprises a core shaft hole penetratingly arranged in the core shaft assembly, one end of the core shaft hole is in communication with the receiving cavity.

[0009] Further, the core shaft assembly comprises a first core shaft and a second core shaft, the second core shaft extends into the receiving cavity, and the first core shaft is located outside the main valve sleeve; the moving core sleeve is arranged outside the first core shaft, and the first core shaft is sleeved outside the second core shaft; a first shaft hole penetratingly arranged on the first core shaft and a second shaft hole penetratingly arranged on the second core shaft form the core shaft hole.

[0010] Further, the pilot flow channel comprises a head cavity arranged between the valve shell, the main valve sleeve and the core shaft assembly; the other end of the core shaft hole is in communication with the head cavity; the head cavity is sealed and isolated from the receiving cavity.

[0011] Further, the pilot flow channel comprises a throttling channel arranged in the main valve sleeve, the throttling channel comprises a throttling hole and a throttling gap, one end of the throttling hole and the throttling gap is in communication with the head cavity, and the other end is in communication with the main flow channel, the minimum aperture of the throttling hole is smaller than the aperture of the balance hole; only the throttling hole is opened in the de-energized state of the moving core assembly, and the throttling hole and the throttling gap are opened in the low current state of the moving core assembly.

[0012] Further, one end of the core shaft assembly close to the main valve core is provided with a sealing gasket, the sealing gasket is in abutment with the main valve elastic member, and is used for separating the head cavity and the receiving cavity.

[0013] Further, the moving iron core assembly comprises a first diaphragm arranged at the end face of the main valve sleeve, the first diaphragm is movable along the length direction of the valve housing to close or open the throttling gap; the throttling hole is opened at the end face of the main valve sleeve, and the throttling gap is opened in the main valve sleeve.

[0014] Further, the core shaft assembly is sleeved with a pilot valve spring at one end away from the main valve sleeve, which is used to push the core shaft assembly and the first diaphragm to close the throttling gap in the power-off state.

[0015] Further, the outer diameter of the second core shaft at one end close to the main valve core is d1, the outer diameter of the first core shaft sleeved outside the second core shaft is d2, and the outer diameter of the first core shaft at one end away from the second core shaft is d3, d1, d2 and d3 are the same.

[0016] Further, the damping solenoid valve comprises a first bearing sleeved outside the first core shaft and a second bearing sleeved outside the second core shaft, the first bearing and the second bearing are used to guide the first core shaft and the second core shaft to move along the length direction of the valve housing.

[0017] Further, the main valve elastic member comprises a main valve large spring, a spring seat and a main valve small spring, the main valve large spring and the spring seat are sleeved outside the main valve small spring, the main valve large spring is arranged between the main valve core and the spring seat, and the main valve small spring is arranged between the spring seat and the main valve sleeve.

[0018] Further, the valve housing comprises a housing, a head and a magnetic shielding sleeve connecting the housing and the head, the housing, the moving iron core and the head are all magnetic conductive members to form a magnetic conductive loop.

[0019] Further, the moving iron core assembly further comprises a second diaphragm arranged outside the core shaft assembly, the second diaphragm closes the core shaft hole in the high current state.

[0020] Further, the main flow passage comprises an inlet, an outlet and a valve port formed by the main valve seat and the main valve core, and the two ends of the pilot flow passage are in communication with the inlet and the outlet respectively.

[0021] The application further provides a shock absorber comprising a shock absorber body and the damping solenoid valve, the shock absorber body is provided with a mounting seat, and the damping solenoid valve is mounted on the shock absorber body through the mounting seat.

[0022] The damping electromagnetic valve of the present application comprises a valve housing, a main valve core assembly and a moving iron core assembly arranged in the valve housing, and a guide valve core arranged between the main valve core assembly and the moving iron core assembly is cancelled, so that the mass of the damping electromagnetic valve is reduced, and meanwhile, two ends of the main valve elastic member are respectively in abutment with the main valve core and the main valve sleeve, so that the sticking of the guide valve core and the moving iron core assembly due to the adsorption of impurities is avoided, and the response speed of the moving iron core assembly when moving in the valve housing is relatively fast. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a sectional view of the damping electromagnetic valve of the exemplary embodiment of the present application.

[0024] Figure 2 is a sectional view of the damping electromagnetic valve shown in Figure 1 is a sectional view of the valve body part of the damping electromagnetic valve shown in

[0025] Figure 3 is a sectional view of the valve body part of the damping electromagnetic valve shown in Figure 1 is a sectional view of the valve body part of the damping electromagnetic valve shown in

[0026] Figure 4 is a sectional view of the valve body part of the damping electromagnetic valve shown in Figure 1 is a sectional view of the valve body part of the damping electromagnetic valve shown in

[0027] Figure 5 is a sectional view of the valve body part of the damping electromagnetic valve shown in Figure 2 is a partial enlarged view showing only part of the valve body part.

[0028] Figure 6 is a partial enlarged view showing only part of the valve body part. Figure 3

[0029] Figure 7 is a structural schematic view of the damper of the present application.

[0030] Figure 8 is a sectional view of the damper shown in Figure 7 is a sectional view of the damper shown in

[0031] Figure 9 is a structural schematic view of the damper of another embodiment of the present application.

[0032] REFERENCE SIGNS

[0033] ​100, valve body part; 10, valve housing; 11, head chamber; 12, housing; 13, head; 14, magnetic isolation sleeve; 20, main spool assembly; 21, main valve seat; 211, inlet port; 212, outlet port; 213, valve port; 22, main spool; 221, receiving cavity; 222, balance hole; 23, main valve sleeve; 231, throttling passage; 2311, throttling hole; 2312, throttling gap; 24, main valve spring; 241, main valve large spring; 2411, first sub-cavity; 242, spring seat; 2421, communication hole; 243, main valve small spring; 2431, second sub-cavity; 25, main flow passage; 30, moving core assembly; 31, pilot flow passage; 311, first section; 312, second section; 313, third section; 314, fourth section; 315, fifth section; 316, sixth section; 32, moving core; 321, through hole; 33, core shaft assembly; 331, first core shaft; 3311, first shaft hole; 332, second core shaft; 3321, second shaft hole; 333, core shaft hole; 35, first diaphragm; 351, diaphragm hole; 36, second diaphragm; 40, guide assembly; 41, first bearing; 411, bearing hole; 42, second bearing; 43, pilot valve spring; 44, sealing washer; 200, coil part; 300, damper body; 400, mounting seat; 401, connector; 4011, connecting hole; 4012, O-ring; 402, hole plate; 4021, through hole. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments (or, implementations) of the present application will be clearly and completely described in combination with the drawings. When the following description refers to the drawings, the same or similar elements in different drawings are denoted by the same reference numerals unless otherwise indicated.

[0035] If the application embodiments involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, motion condition, etc. between the components in a certain posture (as shown in the drawings); if the specific posture changes, the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. in the application embodiments are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0036] Reference is made to Figures 1 to 4As shown, the application provides a damping electromagnetic valve, which comprises a coil component 200 and a valve body component 100, the coil component 200 is arranged outside the valve body component 100. The valve body component 100 comprises a valve housing 10, a main valve core assembly 20, a moving iron core assembly 30 and a guide assembly 40. The main valve core assembly 20, the moving iron core assembly 30 and the guide assembly 40 are arranged in the valve housing 10. The main valve core assembly 20 abuts against the moving iron core assembly 30. The guide assembly 40 is arranged outside the moving iron core assembly 30.

[0037] A head chamber 11 is formed between the valve housing 10, the main valve sleeve 23 and the moving iron core assembly 30. The valve housing 10 comprises a shell 12, a head 13 and a magnetic shielding sleeve 14. The shell 12 and the head 13 are both magnetic conductive members. The magnetic shielding sleeve 14 connects the shell 12 and the head 13. In the embodiment of the application, the magnetic shielding sleeve 14 is laser welded with the shell 12 and the head 13, which reduces the processing cost compared with the tunnel furnace brazing process. The magnetic shielding sleeve 14 is used to block the magnetic flux leakage of the non-working area, which can reduce the energy loss.

[0038] The main valve core assembly 20 comprises a main valve seat 21, a main valve core 22, a main valve sleeve 23 and a main valve elastic member 24. The main valve seat 21 abuts against the main valve core 22 and the main valve sleeve 23. The main valve seat 21 is provided with an inlet port 211 and an outlet port 212. A valve port 213 is arranged between the main valve seat 21 and the main valve core 22. A receiving cavity 221 is formed between the main valve core 22 and the main valve sleeve 23. The main valve core 22 is provided with a balance hole 222, which communicates the inlet port 211 and the receiving cavity 221. The two ends of the main valve elastic member 24 abut against the main valve core 22 and the main valve sleeve 23, respectively. The main valve seat 21 and the main valve core 22 are arranged on a main flow channel 25. The main flow channel 25 comprises the inlet port 211, the valve port 213 and the outlet port 212.

[0039] The main valve sleeve 23 is provided with a throttling passage 231, which comprises a throttling hole 2311 and a throttling gap 2312. One end of the throttling hole 2311 and the throttling gap 2312 communicates with the head chamber 11, and the other end thereof communicates with the main flow channel 25. The minimum diameter of the throttling hole 2311 is smaller than the diameter of the balance hole 222. Only the throttling hole 2311 is opened in the de-energized state of the moving iron core assembly 30, and both the throttling hole 2311 and the throttling gap 2312 are opened in the low current state of the moving iron core assembly 30.

[0040] According to the embodiment of the application, the throttling hole 2311 is arranged in the main valve sleeve 23 and opens at the end face of the main valve sleeve 23.

[0041] The main valve elastic member 24 comprises a main valve large spring 241, a spring seat 242 and a main valve small spring 243. The main valve large spring 241 and the spring seat 242 are sleeved outside the main valve small spring 243. The main valve large spring 241 is arranged between the main valve core 22 and the spring seat 242. The main valve small spring 243 is arranged between the spring seat 242 and the moving iron core assembly 30. The spring seat 242 divides the accommodation cavity 221 into a first sub-cavity 2411 for accommodating the main valve large spring 241 and a second sub-cavity 2431 for accommodating the main valve small spring 243. The spring seat 242 is provided with a communication hole 2421 for communicating the first sub-cavity 2411 and the second sub-cavity 2431.

[0042] According to the design of the main valve large spring 241, the main valve small spring 243 and the spring seat 242, when the main valve core 22 moves, the spring force of the main valve small spring 243 needs to be overcome first, then the spring force of the main valve large spring 241 needs to be overcome, and finally the spring force of the spring seat 242 needs to be overcome. Therefore, when the wheel is subjected to fine vibration, the damping force can be provided by the small spring, and the comfort can be improved.

[0043] The main valve core 22, the main valve sleeve 23, the moving iron core assembly 30 and the valve housing 10 jointly form a pilot flow channel 31, and two ends of the pilot flow channel 31 are communicated with two ends of the main flow channel 25. According to the embodiment of the present application, the main flow channel 25 and one end of the pilot flow channel 31 are communicated at an inlet port 211, and the inlet port 211 is a medium inlet of the two flow channels. The main flow channel 25 and the other end of the pilot flow channel 31 are communicated at an outlet port 212, and the outlet port 212 is a medium outlet of the two flow channels. The moving iron core assembly 30 moves along the length direction of the valve housing 10 under the action of electromagnetic force to adjust the flow of the pilot flow channel 31, so as to adjust the flow of the main flow channel 25.

[0044] The moving iron core assembly 30 comprises a moving iron core 32 and a core shaft assembly 33 arranged through the moving iron core 32. The core shaft assembly 33 is provided with a core shaft hole 333 penetrating through. One end of the core shaft hole 333 is communicated with the second sub-cavity 2431, and the other end of the core shaft hole 333 is communicated with the head cavity 11. The core shaft assembly 33 comprises a first core shaft 331 and a second core shaft 332. The first core shaft 331 is located outside the main valve sleeve 23, the moving iron core 32 is sleeved outside the first core shaft 331 and is in interference fit with the first core shaft 331. The second core shaft 332 extends into the accommodation cavity 221 at one end close to the main valve core 22, and the first core shaft 331 is sleeved outside the second core shaft 332 and is in interference fit with the second core shaft 332. The guide length of the second core shaft 332 is relatively long and extends into the accommodation cavity 221, and the moving iron core assembly 30 is not easy to be stuck in the movement.

[0045] According to the embodiment of the present application, the moving iron core 32 is a magnetic conducting member, the shell 12, the moving iron core 32 and the end cover 13 are used to form a magnetic conducting loop with the coil component 200, so as to optimize the magnetic field distribution and improve the electromagnetic driving efficiency.

[0046] The first core shaft 331 is provided with a first shaft hole 3311 penetrating therethrough. The second core shaft 332 is provided with a second shaft hole 3321 penetrating therethrough. The core shaft hole 333 is formed by the first shaft hole 3311 and the second shaft hole 3321. The moving iron core 32 is also provided with a through hole 321 penetrating therethrough. The through hole 321 is located in the head chamber 11. The medium can flow from the receiving chamber 221 into the second shaft hole 3321, flow through the first shaft hole 3311, and then flow into the head chamber 11 and the through hole 321. The first shaft hole 3311 and the second shaft hole 3321 jointly form the core shaft hole 333, ensuring the continuity of the medium flow in the pilot flow passage 31, and avoiding the risk of leakage caused by the connection of multiple shaft holes in sequence.

[0047] Please also refer to Figure 5 and Figure 6 As shown in the drawings, the outer diameter of the end of the second core shaft 332 close to the main valve core 22 is d1, the outer diameter of the first core shaft 331 sleeved outside the second core shaft 332 is d2, and the outer diameter of the end of the first core shaft 331 away from the second core shaft 332 is d3. According to the embodiments of the present application, d1, d2 and d3 are the same.

[0048] In some embodiments, the size relationship between d1 and d2 can be adjusted as needed, and the moving iron core assembly 30 can normally open or close the pilot flow passage 31 under the action of magnetic force.

[0049] In some embodiments, the sizes of d1, d2 and d3 can also be different but close in value. Since there is pressure in the pilot flow passage 31 and friction will be generated when the moving iron core assembly 30 moves, and there can be a situation that needs to make the moving iron core assembly 30 easier to open or close, one of d1, d2 or d3 needs to be set larger or smaller.

[0050] The moving iron core assembly 30 includes a first diaphragm 35 arranged on the end face of the main valve sleeve 23 and a second diaphragm 36 arranged between the first core shaft 331 and the head 13. The throttling gap 2312 is opened in the main valve sleeve 23. According to the embodiments of the present application, the throttling gap 2312 is the gap between the second core shaft 332 and the main valve sleeve 23, and the opening of the throttling gap 2312 faces the second core shaft 332.

[0051] The first diaphragm 35 is provided with a plurality of diaphragm holes 351. The medium flows from the head chamber 11, flows into the throttling hole 2311 and the throttling gap 2312 through the diaphragm hole 351, and finally flows into the space between the main valve sleeve 23 and the valve housing 10 and then flows out from the outflow port 212. The first diaphragm 35 moves along the length direction of the valve housing 10 to block or open the throttling gap 2312, so that the medium flows through the throttling hole 2311 and the throttling gap 2312 at the same time or only through the throttling hole 2311.

[0052] The guide assembly 40 comprises a first bearing 41, a second bearing 42, a pilot valve spring 43 and a sealing washer 44. The first bearing 41 is sleeved on the first mandrel 331, and the second bearing 42 is sleeved on the second mandrel 332. The first bearing 41 and the first mandrel 331, and the second bearing 42 and the second mandrel 332 are in clearance fit, and the clearance only guides the first mandrel 331 and the second mandrel 332 to move along the length direction of the valve housing 10, and sealing is not required. The first bearing 41 and the second bearing 42 guide the mandrel assembly 33, and ensure that the mandrel assembly 33 moves accurately along the length direction of the valve housing 10, and wear or jam caused by deflection is avoided.

[0053] According to the embodiment of the present application, the first bearing 41 is further provided with a bearing hole 411, and the bearing hole 411 and the through hole 321 are both components of the head chamber 11.

[0054] The pilot valve spring 43 is arranged at the end of the mandrel assembly 33 away from the main valve sleeve 23, and is used for pushing the mandrel assembly 33 and the first diaphragm 35 to block the throttling gap 2312 in the power-off state. According to the embodiment of the present application, the pilot valve spring 43 is sleeved on the first mandrel 331, and the two ends of the pilot valve spring 43 abut against the moving iron core 32 and the first bearing 41 respectively.

[0055] The sealing washer 44 is arranged at the end of the mandrel assembly 33 close to the main valve core 22, and is sleeved on the second mandrel 332. The two ends of the sealing washer 44 abut against the main valve small spring 243 and the second bearing 42 respectively, and the main valve small spring 243 presses the sealing washer 44 tightly. The second mandrel 332 and the sealing washer 44 are in clearance fit, and the clearance is very small, and the effect close to sealing can be achieved. The sealing washer 44 is used for separating the head chamber 11 and the receiving cavity 221, and the throttling gap 2312 and the second sub-cavity 2431 are mutually sealed and separated. The sealed and isolated design of the head chamber 11 and the receiving cavity 221 prevents medium interference between the two cavities, and ensures the control function of the pilot flow passage 31.

[0056] The pilot flow passage 31 comprises a first segment 311 from the inlet 211, through the balance hole 222, into the first sub-cavity 2411, and then through the communication hole 2421 to the second sub-cavity 2431. The pilot flow passage 31 comprises a second segment 312 through the second shaft hole 3321 and then through the first shaft hole 3311. The pilot flow passage 31 comprises a third segment 313 from the first shaft hole 3311 into the head chamber 11, and then through the bearing hole 411 and the through hole 321. The pilot flow passage 31 comprises a fourth segment 314 from the through hole 321, through the diaphragm hole 351 and into the throttling hole 2311. The pilot flow passage 31 comprises a fifth segment 315 from the through hole 321, through the diaphragm hole 351 and into the throttling gap 2312. The pilot flow passage 31 comprises a sixth segment 316 from the throttling passage 231 to the space between the main valve sleeve 23 and the valve housing 10, and finally to the outlet 212.

[0057] Referring to Figures 7 to 9 According to the application, the damping electromagnetic valve can be provided in two.

[0058] The damping electromagnetic valve according to the application has three states, namely, a power-off state, a low-current state and a high-current state. Figure 2 and Figure 5 In the power-off state of the damping electromagnetic valve, the moving iron core 32 is in clearance fit with the housing 12, the end cover 13 and the magnetic shield sleeve 14, and the clearance is relatively large, so that the moving iron core 32 will not be stuck due to impurities in the clearance. Under the action of the pilot valve spring 43, the moving iron core assembly 30 moves to the left, and the left end surface of the first core shaft 331 abuts against the first diaphragm 35 and makes the first diaphragm 35 abut against the end surface of the main valve sleeve 23. At this time, the first diaphragm 35 blocks the throttling gap 2312, and the pilot flow passage 31 can only flow out through the throttling hole 2311 in the main valve sleeve 23. Since the minimum diameter of the throttling hole 2311 is smaller than the diameter of the balance hole 222, the pilot flow passage 31 is throttled by the throttling hole 2311 in the main valve sleeve 23. At the same time, since the pilot flow is small, the pressure in the accommodation cavity 221 is released slowly, and the pressure difference between the inlet port 211 and the accommodation cavity 221 is small, which cannot overcome the spring force of the main valve elastic member 24 to open the main valve core 22. Therefore, when the damping force is slightly large, the shock absorber is moderately hard, which can meet the controllability while taking into account the comfort.

[0059] Figure 3 and Figure 6 In the low-current state of the damping electromagnetic valve, the moving iron core assembly 30 runs to the middle of the stroke under the action of the electromagnetic force and overcomes the elastic force of the pilot valve spring 43. At this time, the opening between the left end surface of the first core shaft 331 and the first diaphragm 35 and the main valve sleeve 23 is large enough. The throttling gap 2312 is opened, so that the flow capacity of the throttling gap 2312 and the throttling hole 2311 is larger than that of the balance hole 222. Therefore, the pilot flow passage 31 is throttled by the balance hole 222 of the main valve core 22. Since the accommodation cavity 221 is on the right side of the balance hole 222, the pressure in the accommodation cavity 221 is equivalent to the pressure at the outlet port 212, and the pressure difference between the inlet port 211 and the accommodation cavity 221 is large. The pressure difference can easily overcome the spring force of the main valve elastic member 24 to open the main valve core 22, so that the shock absorber is soft, the comfort of vehicle driving is good, but the controllability is poor.

[0060] Figure 4In order to damp the state of high current through the electromagnetic valve, the moving core assembly 30 is driven by electromagnetic force to overcome the elastic force of the pilot valve spring 43 to the right end of the stroke. At this time, the right end face of the first core shaft 331 tightly presses and blocks the first shaft hole 3311 with the second diaphragm 36. The flow capacity of the pilot flow passage 31 is very small or even completely blocked, so the pilot flow passage 31 is throttled by the first core shaft 331 and the second diaphragm 36 and can achieve 0 flow. At this time, since the pressure in the receiving cavity 221 is equivalent to the pressure at the inlet port 211, the pressure difference is difficult to overcome the spring force of the main valve elastic member 24 to open the main valve core 22, so the damper is hard, the vehicle handling is good, but the comfort of the passengers is poor.

[0061] According to the embodiments of the present application, by adjusting the relationship between d3 and d2, d1, the influence of the pressure difference force can be reduced, so that the elastic force of the pilot valve spring 43 can close the moving core assembly 30 when power off, and the electromagnetic force can open the moving core assembly 30 when power on.

[0062] In the embodiments of the present application, the related parts of the pilot flow passage 31, such as the first core shaft 331, the second core shaft 332, the first diaphragm 35 and the second diaphragm 36, are non-magnetic members, which have a relatively low risk of attracting impurities.

[0063] Referring to Figure 1 As shown, the damper body 300 and the main valve seat 21 are provided with a connecting head 401 and a hole plate 402. One end of the connecting head 401 extends into the damper body 300 and abuts against the damper body 300, and the other end of the connecting head 401 abuts against the main valve seat 21. The connecting head 401 is provided with a connecting hole 4011 which communicates the internal chamber of the damper body 300 with the inlet port 211. An O-ring 4012 is further provided between the connecting head 401 and the damper body 300 to seal the gap between the damper body 300 and the connecting head 401. The hole plate 402 is sleeved on the connecting head 401, and the hole plate 402 is provided with a through hole 4021 which communicates with the outlet port 212.

[0064] When the damper is assembled, the valve body part 100, the hole plate 402, the connecting head 401 and the O-ring 4012 are first assembled into the mounting seat 400, and the threads between the housing 12 and the mounting seat 400 are tightened to ensure sealing. Then the coil part 200 is pressed into the mounting seat 400.

[0065] In the existing scheme, in the closed state of the damping electromagnetic valve, the whole gap between the pilot valve core and the matching hole of the valve shell is the throttling part for controlling the flow of the pilot flow passage. Since the pilot valve core and the matching hole are easily worn under fluid pressure, and the pilot valve core is also easily stuck due to impurities in the fluid, the damper is prone to failure or failure, affecting the passenger experience, and even affecting the safety of operation.

[0066] The damping electromagnetic valve comprises a valve shell 10, a main valve core assembly 20 and a moving iron core assembly 30 arranged in the valve shell 10, and a guide valve core arranged between the main valve core assembly 20 and the moving iron core assembly 30 is cancelled, so that the mass of the moving part of the damping electromagnetic valve is reduced. Meanwhile, the two ends of the main valve elastic member 24 are respectively in abutment with the main valve core 22 and the main valve sleeve 23, so that the jamming of the guide valve core and the moving iron core assembly 30 caused by the adsorption of impurities is avoided, and the response speed of the moving iron core assembly 30 when moving in the valve shell 10 is relatively fast.

[0067] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A damping solenoid valve, characterized in that, The valve body component and the coil component; the valve body component comprises a valve housing, a main valve core assembly and a moving core assembly arranged in the valve housing, the main valve core assembly comprises a main valve seat, a main valve core, a main valve sleeve and a main valve elastic element, the two ends of the main valve elastic element are respectively in contact with the main valve core and the main valve sleeve; The main valve seat and the main valve core are arranged on a main flow channel, the main valve core, the main valve sleeve, the moving core assembly and the valve housing jointly form a pilot flow channel; the moving core assembly moves along the length direction of the valve housing to adjust the flow of the pilot flow channel; the moving core assembly comprises a moving core and a core shaft assembly penetrating through the moving core; the core shaft assembly comprises a first core shaft and a second core shaft, the moving core is sleeved outside the first core shaft, and the first core shaft is sleeved outside the second core shaft.

2. The damping solenoid valve according to claim 1, characterized in that The pilot flow channel comprises a balance hole arranged on the main valve core and a receiving cavity arranged between the main valve core and the main valve sleeve; the pilot flow channel comprises a core shaft hole penetrating through the core shaft assembly, one end of the core shaft hole is in communication with the receiving cavity.

3. The damping solenoid valve according to claim 2, wherein The second core shaft extends into the receiving cavity, and the first core shaft is located outside the main valve sleeve; a first shaft hole penetrating through the first core shaft is arranged on the first core shaft, and a second shaft hole penetrating through the second core shaft is arranged on the second core shaft, and the core shaft hole is formed by the first shaft hole and the second shaft hole.

4. The damping solenoid valve according to claim 2, wherein The pilot flow channel comprises a head cavity arranged between the valve housing, the main valve sleeve and the core shaft assembly; the other end of the core shaft hole is in communication with the head cavity; the head cavity is sealed and isolated from the receiving cavity.

5. The damping solenoid valve according to claim 4, wherein The pilot flow channel comprises a throttling channel arranged in the main valve sleeve, the throttling channel comprises a throttling hole and a throttling gap, and the throttling hole and the throttling gap are both in communication with the head cavity at one end and in communication with the main flow channel at the other end, the minimum aperture of the throttling hole is smaller than the aperture of the balance hole; only the throttling hole is open in the de-energized state of the moving core assembly, and the throttling hole and the throttling gap are both open in the low-current state of the moving core assembly.

6. The damping solenoid valve according to claim 4, wherein The end of the core shaft assembly close to the main valve core is provided with a sealing washer, the sealing washer is in contact with the main valve elastic element, and is used for separating the head cavity and the receiving cavity.

7. The damping solenoid valve according to claim 5, wherein The moving core assembly comprises a first diaphragm arranged on the end face of the main valve sleeve, the first diaphragm moves along the length direction of the valve housing to block or open the throttling gap; the throttling hole is open at the end face of the main valve sleeve, and the throttling gap is open in the main valve sleeve.

8. The damping solenoid valve according to claim 7, characterized in that The end of the core shaft assembly away from the main valve sleeve is sleeved with a pilot valve spring, which is used for pushing the core shaft assembly and the first diaphragm to block the throttling gap in the de-energized state.

9. The damping solenoid valve according to claim 3, wherein The outer diameter of the end of the second core shaft close to the main valve core is d1, the outer diameter of the first core shaft sleeved outside the second core shaft is d2, and the outer diameter of the end of the first core shaft away from the second core shaft is d3, d1, d2 and d3 are the same.

10. The damping solenoid valve according to claim 3, wherein The damping electromagnetic valve comprises a first bearing sleeved outside the first core shaft and a second bearing sleeved outside the second core shaft, and the first bearing and the second bearing are used for guiding the first core shaft and the second core shaft to move along the length direction of the valve shell.

11. The damping solenoid valve according to claim 1, wherein The main valve elastic member comprises a main valve large spring, a spring seat and a main valve small spring, the main valve large spring and the spring seat are sleeved outside the main valve small spring, the main valve large spring is arranged between the main valve core and the spring seat, and the main valve small spring is abutted against the spring seat and the main valve sleeve.

12. The damping solenoid valve according to claim 2, wherein The valve shell comprises a shell, a head and a magnetic shielding sleeve connecting the shell and the head, and the shell, the moving iron core and the head are all magnetic conductive members to form a magnetic conductive loop.

13. The damping solenoid valve according to claim 2, wherein The moving iron core assembly further comprises a second diaphragm arranged outside the core shaft assembly, and the second diaphragm blocks the core shaft hole in a high current state.

14. The damping solenoid valve according to claim 1, characterized in that The main flow channel comprises an inlet, an outlet and a valve port formed by the main valve seat and the main valve core, and the two ends of the pilot flow channel are respectively communicated with the inlet and the outlet.

15. A damper characterized by The shock absorber body is provided with a mounting seat, and the damping electromagnetic valve is mounted on the shock absorber body through the mounting seat.

Images