Shock absorber electromagnetic valve with one-way oil return valve

Abstract

The invention belongs to the technical field of shock absorbers, and particularly relates to a shock absorber electromagnetic valve with a one-way oil return valve, which comprises an electromagnetic assembly and an oil way assembly arranged in an electromagnetic valve seat of the electromagnetic assembly, the oil way assembly comprises a valve body fixedly connected into the electromagnetic valve seat, an overflow valve arranged at the bottom of the valve body, a one-way oil return valve arranged at an inlet of the valve body and a throttling valve arranged between the one-way oil return valve and the overflow valve. The shock absorber is used for solving the technical problem that most of existing shock absorbers are of a single electromagnetic valve structure, and compression damping of the shock absorbers cannot be adjusted.

Description

Technical Field

[0001] The invention belongs to the technical field of shock absorbers, and in particular relates to a shock absorber solenoid valve with a one-way oil return valve. Background Art

[0002] With the development of science and technology, intelligence has gradually become popular in people's lives. Passengers have higher and higher requirements for intelligent driving and comfort. Traditional suspension and traditional shock absorbers can no longer meet current needs. The demand for intelligent suspension and intelligent shock absorbers is increasing, and intelligent suspension and intelligent shock absorbers require solenoid valves to adjust and control the damping force. At present, the intelligent shock absorbers on the market all adjust the damping force by adjusting the electromagnetic force of the solenoid valve, which limits the adjustability and adjustable range of the shock absorber compression damping. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a shock absorber solenoid valve with a one-way oil return valve, including an electromagnetic assembly and an oil circuit assembly. The oil circuit assembly is provided with a one-way oil return valve. When the shock absorber is restored, part of the medium will return to the oil circuit assembly from the one-way oil return valve to provide a restoring damping force to improve comfort. This is used to solve the technical problem that the current shock absorber adjusts the damping force through the electromagnetic force of the solenoid valve, but cannot adjust the compression damping of the shock absorber.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a shock absorber solenoid valve with a one-way oil return valve, the solenoid valve comprises a solenoid assembly and an oil circuit assembly arranged in a solenoid valve seat of the solenoid assembly, the oil circuit assembly comprises a valve body fixedly connected to the solenoid valve seat, a relief valve arranged at the bottom of the valve body, a one-way oil return valve arranged at the inlet of the valve body, and a throttle valve arranged between the one-way oil return valve and the relief valve; The one-way oil return valve comprises an inlet valve seat and an inlet valve plate, the end of the inlet valve seat is provided with two raised annular sealing lines, the oil inlet is provided on the inlet valve seat and is located inside the two sealing lines, and the oil return port is provided on the inlet valve seat and is located between the two sealing lines; the inlet valve plate is connected to the inlet valve seat and abuts against the sealing lines; The relief valve comprises a main valve core and a piston ring which are slidably connected to the valve body, the main valve core comprises a large head section sleeved in the valve body and a small head section inserted into an opening at the bottom of the valve body, a damping hole is arranged at the bottom of the large head section, and an oil drain hole is arranged on the small head section; the piston ring is sleeved outside the large head section; The side wall of the valve body is provided with an overflow port which is controlled to open and close during the sliding process of the main valve core; The electromagnetic assembly comprises a tapered rod driven by magnetic force, and the end of the tapered rod contacts the small head section of the main valve core to seal the oil drain hole.

[0005] Preferably, the inlet valve plate is provided with an inlet hole and an inlet groove matching with the oil inlet.

[0006] Preferably, the inlet valve sheet is provided with at least one layer.

[0007] Preferably, the oil drain hole includes a radial hole communicating with the space between the main valve core and the bottom of the valve body, and an axial hole coaxially arranged with the small head section, and the axial hole is communicated with the radial hole.

[0008] Preferably, the overflow valve further comprises a supporting valve seat fixedly connected to the valve body, wherein the supporting valve seat is disposed between the throttle valve and the main valve core and is used for limiting the main valve core.

[0009] Preferably, the throttle valve comprises a throttle valve seat and a throttle valve plate, and the throttle hole on the throttle valve seat cooperates with the throttle groove on the throttle valve plate to form a normally open throttle channel with adjustable flow.

[0010] Preferably, the electromagnetic assembly includes an integrated yoke sleeve fixedly connected to the electromagnetic valve seat, a coil arranged in the integrated yoke sleeve, a moving iron core cooperating with the coil, a push rod fixedly connected to the moving iron core, and a pole shoe fixedly connected to the opening on the integrated yoke sleeve, the end of the push rod passes through the pole shoe and extends out of the integrated yoke sleeve, and the conical rod is connected to the end of the push rod extending out of the integrated yoke sleeve.

[0011] Preferably, the end of the tapered rod is in a conical shape.

[0012] The beneficial effects of the technical solution of the present invention are: An oil circuit assembly is arranged in the electromagnetic valve seat of the electromagnetic assembly of the present invention. The oil circuit assembly includes a valve body, an overflow valve, a one-way oil return valve and a throttle valve. The overflow valve includes a main valve core slidably connected in the valve body and a piston ring sleeved outside the main valve core. A first volume chamber is formed between the one-way oil return valve and the throttle valve, a second volume chamber is formed between the throttle valve and the overflow valve, a third volume chamber is formed between the piston ring, the main valve core and the bottom of the valve body, the second volume chamber and the third volume chamber are connected through a damping hole, the shock absorber compresses the medium to enter the oil circuit assembly from the one-way oil return valve, and a pressure difference can be formed between the second volume chamber and the third volume chamber, thereby providing a stable damping force for the shock absorber; the pressure in the third volume chamber counteracts the electromagnetic force of the electromagnetic assembly on the cone rod, and when the pressure is greater than the electromagnetic force , the medium is discharged from the oil drain hole into the oil return channel formed between the valve body and the electromagnetic valve seat to achieve oil drainage, and the oil drain medium returns to the shock absorber so that the shock absorber can recover. The oil drainage process provides damping force, so that different electromagnetic forces can obtain different restoring forces; and, when the pressure in the oil return channel is greater than the pressure in the first volume chamber, the pressure forces the oil return port on the one-way oil return valve to open, so that a part of the medium returns to the first volume chamber, and the remaining part of the medium returns to the shock absorber to force the shock absorber to recover, and forms recovery damping to provide buffering for the recovery of the shock absorber; in this way, in the compression and recovery process of the shock absorber, a variety of damping forces can be formed to provide buffering, so as to achieve the problem of adjustable damping force in the recovery and compression process of the shock absorber, improve the riding comfort of passengers, and meet the use needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic overall cross-sectional view of an embodiment of a shock absorber solenoid valve with a one-way oil return valve; Figure 2 A schematic diagram of a one-way oil return valve of an embodiment of a shock absorber solenoid valve having a one-way oil return valve; Figure 3 A schematic diagram of a throttle valve of an embodiment of a shock absorber solenoid valve having a one-way oil return valve; Figure 4 A schematic diagram of a relief valve of an embodiment of a shock absorber solenoid valve having a one-way oil return valve; Figure 5 The present invention is a schematic diagram of the oil flow direction of an embodiment of a shock absorber solenoid valve with a one-way oil return valve.

[0014] Among them, in Figures 1-5, 1-introduction valve seat, 1.1-oil inlet, 1.2-oil return port, 1.3-sealing line, 2-introduction valve plate, 3-throttle valve seat, 4-throttle valve plate, 5-support valve seat, 6-main valve core, 6.1-damping hole, 6.2-oil drain hole, 7-piston ring, 8-valve body, 8.1-overflow port, 9-solenoid valve seat, 10-solenoid valve gland, 11-plug, 12-upper yoke, 13-integrated yoke sleeve, 14-coil, 15-pole shoe, 16-front guide sleeve, 17-rear guide sleeve, 18-moving iron core, 19-top rod, 20-cone rod; A-first volume chamber, B-second volume chamber, C-third volume chamber, T-oil return channel. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and do not limit the scope of the present invention.

[0016] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The specific embodiments are as follows: Embodiment 1, as Figure 1-5 As shown, a shock absorber solenoid valve with a one-way oil return valve includes an electromagnetic component and an oil circuit component. The electromagnetic component includes an electromagnetic valve seat 9 and a cone rod 20. The cone rod 20 is arranged in the electromagnetic valve seat 9 and is driven to move by magnetic force.

[0019] The oil circuit assembly is arranged in the solenoid valve seat 9. The oil circuit assembly includes a valve body 8, a relief valve, a one-way oil return valve and a throttle valve. The valve body 8 is fixedly connected in the solenoid valve seat 9, and the gap between the valve body 8 and the side wall of the solenoid valve seat 9 forms an oil return channel T. The one-way oil return valve is arranged at the entrance of the upper end of the valve body 8. The one-way oil return valve includes an inlet valve seat 1 and an inlet valve plate 2. Two annular sealing lines are arranged near the outer edge on the end surface of the inlet valve seat 1 extending into the valve body 8. The two sealing lines are coaxially sleeved and protrude outward. The oil inlet 1.1 on the inlet valve seat 1 is arranged on the inner side of the two sealing lines, and the oil return port 1.2 is arranged between the two sealing lines. The inlet valve plate 2 is connected to one end of the inlet valve seat 1 having a sealing line, and is connected through a connecting piece, using methods including but not limited to springs, disc springs, thin-plate preloads or other reed preloads and giving the inlet valve plate a certain pre-deformation, and the connection methods include but are not limited to screws and nuts, screws, fixing rods, etc.; in this way, the inlet valve plate 2 abuts against the two sealing lines, and seals the space between the two sealing lines, that is, seals the return oil port 1.2 arranged between the two sealing lines, and when the inlet valve plate 2 is away from the sealing line under the action of external force, the return oil port 1.2 is opened to realize the one-way oil return function.

[0020] The overflow valve includes a main valve core 6 and a piston ring 7. The main valve core 6 includes a large head section and a small head section. The large head section is sleeved and slidably connected in the valve body 8, and a damping hole 6.1 penetrating up and down is provided at the bottom of the large head section. The piston ring 7 is sleeved on the outer circular groove of the large head section. The small head section is coaxially arranged at the bottom of the large head section, and an oil drain hole 6.2 extending from the side wall to the bottom end is provided on the small head section, and the small head section is penetrated in the opening provided at the bottom of the valve body 8. The small head section is arranged above the conical rod 20, and the oil drain hole 6.2 is sealed when the conical rod 20 abuts against the small head section.

[0021] An overflow port 8.1 is provided on the side wall of the valve body 8, and the overflow port 8.1 is opened and closed during the reciprocating sliding process of the main valve core 6.

[0022] The throttle valve is arranged between the one-way oil return valve and the overflow valve, and the lower limit of the damping bandwidth is adjusted by adjusting the normal passage of the throttle valve. The throttle valve includes a throttle valve seat 3 and a throttle valve plate 4. The throttle hole on the throttle valve seat 3 cooperates with the throttle groove on the throttle valve plate 4 to form a normal throttle passage with adjustable flow. When the flow pressure of the medium is less than the stiffness of the throttle valve plate 4, the medium flows through the normal throttle passage. When the flow pressure is greater than the stiffness of the throttle valve plate 4, the throttle valve plate 4 is deformed, and the throttle passage becomes larger to obtain a greater flow rate. More specifically, a sealing line is arranged near the outer edge at the bottom of the throttle valve seat 3, and the throttle valve plate 4 is connected to the bottom of the throttle valve seat 3 and is interference-connected with the sealing line, wherein a connection method including but not limited to screws and nuts, screws, and fixing rods is used to give the throttle valve plate a certain amount of pre-deformation.

[0023] In this embodiment, a shock absorber solenoid valve with a one-way oil return valve is connected to the shock absorber when in use. When the shock absorber is compressed, the medium in the shock absorber enters the solenoid valve from the oil inlet 1.1. Before the medium enters the solenoid valve, the main valve core 6 is at the bottom and the overflow port 8.1 is open. The space between the one-way oil return valve and the throttle valve forms a first volume chamber A, the space between the throttle valve and the main valve core forms a second volume chamber B, and the space between the piston ring 7, the main valve core 6 and the bottom of the valve body 8 forms a third volume chamber C. The second volume chamber B and the third volume chamber C are connected through the damping hole 6.1. When the shock absorber is compressed, the medium enters the first volume chamber A from the oil inlet 1.1 on the inlet valve seat 1. The pressure of the first volume chamber A is greater than the pressure at the oil return port 1.2, so that the inlet valve plate 2 presses against the sealing line to form a seal, and the oil return port 1.2 is closed; a pressure difference is formed between the first volume chamber A and the second volume chamber B, and the medium enters the second volume chamber B through the throttle valve. The throttle valve forms a lower limit of the damping force during the flow regulation process. After the medium enters the solenoid valve, the electromagnetic force generated by the start-up of the electromagnetic assembly pushes the cone rod 20 upward, and the cone rod 20 pushes the main valve core 6 upward and closes the overflow port 8.1. The medium enters the third volume chamber C from the damping hole 6.1, and a pressure difference is formed between the second volume chamber B and the third volume chamber C, providing a stable damping force for the shock absorber; as the amount of medium entering the third volume chamber C increases, the pressure in the third volume chamber C gradually increases. When the pressure in the third volume chamber C is greater than the electromagnetic force, the pressure pushes the cone rod 20 away from the main valve core 6. At this time, the oil drain hole 6.2 is opened, and the medium enters the oil return channel T formed between the valve body 8 and the electromagnetic valve seat 9 from the oil drain hole 6.2 to achieve oil leakage. At this time, a damping force is formed in the third volume chamber C and the oil return channel T due to the pressure difference; the medium flows back to the shock absorber through the oil return channel T, so that the shock absorber recovers, and different restoring forces can be obtained with different electromagnetic forces. During the recovery process of the shock absorber, the pressure in the return oil channel T increases continuously. When the pressure in the return oil channel T is greater than the pressure in the first volume chamber A, the pressure forces the inlet valve plate 2 to move away from the sealing line on the inlet valve seat 1, and the medium flows back from the return oil port 1.2 to the first volume chamber A, forming recovery damping and providing recovery buffering.

[0024] Furthermore, an introduction hole and an introduction groove are provided on the introduction valve plate 1, which cooperate with the oil inlet 1.1 to facilitate the adjustment of the oil inlet flow rate.

[0025] Furthermore, the inlet valve plate 2 is provided with at least one layer according to the use requirements to adjust the oil inlet rate and the oil return pressure.

[0026] Furthermore, the oil drain hole 6.2 includes a radial hole and an axial hole. The axial hole is coaxially arranged with the small head section, and the lower end extends to the bottom of the small head section. One end of the radial hole is connected to the upper end of the axial hole, and the other end extends to the side wall of the small head section and is connected to the third volume chamber C, so as to ensure that the third volume chamber C and the oil return channel T are connected.

[0027] Furthermore, the overflow valve further comprises a support valve seat 5. The support valve seat 5 is fixedly connected in the valve body 8 and is located above the overflow port 8.1, and is used to limit the sliding main valve core 6. When the main valve core 6 moves upward and abuts against the bottom of the support valve seat 5, a seal is formed at the connection between the two, and at this time the overflow port 8.1 is closed.

[0028] Furthermore, the electromagnetic assembly includes an integrated yoke sleeve 13, a coil 14, a moving iron core 18, a push rod 19, a pole shoe 15, a solenoid valve gland 10 and a plug 11. The integrated yoke sleeve 13 is fixedly connected to the bottom of the solenoid valve seat 9, the coil 14 is arranged in the integrated yoke sleeve 13, the push rod 19 and the moving iron core 18 are sleeved together and are located inside the coil 14, the lower end of the push rod 19 is connected to the integrated yoke sleeve 13 through the rear guide sleeve 17, the upper end of the push rod 19 is connected to the pole shoe 15 through the front guide sleeve 16, the pole shoe 15 is fixedly connected to the upper end opening of the integrated yoke sleeve 13, the push rod 19 passes through the pole shoe 15 upwards and is connected to the cone rod 20; the upper yoke sheet 12 and the plug 11 are arranged at the lower end of the integrated yoke sleeve 13, and the above electromagnetic assembly is fixed in the solenoid valve seat 9 through the solenoid valve gland 10.

[0029] More specifically, sealing rings are provided between the integrated yoke sleeve 13 and the solenoid valve seat 9 and between the plug 11 and the solenoid valve gland 10 to ensure a firm connection and sealing performance.

[0030] Furthermore, the end of the cone rod 20 is in a conical shape, and the lower end surface of the oil drain hole 6.2 is a conical surface matching the cone rod 20, so as to ensure the sealing effect of the cone rod 20 on the oil drain hole 6.2. More specifically, a connecting groove is provided at the upper end of the top rod 19, and the cone rod 20 extends into the connecting groove with a clearance fit, so that the cone rod 20 can move horizontally to a certain extent, so as to achieve a self-centering effect between the cone rod 20 and the oil drain hole 6.2.

[0031] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A shock absorber solenoid valve with a one-way oil return valve, characterized in that: The solenoid valve comprises a solenoid assembly and an oil circuit assembly arranged in a solenoid valve seat of the solenoid assembly, wherein the oil circuit assembly comprises a valve body fixedly connected to the solenoid valve seat, a relief valve arranged at the bottom of the valve body, a one-way oil return valve arranged at the inlet of the valve body, and a throttle valve arranged between the one-way oil return valve and the relief valve; The one-way oil return valve comprises an inlet valve seat and an inlet valve plate, the end of the inlet valve seat is provided with two raised annular sealing lines, the oil inlet is provided on the inlet valve seat and is located inside the two sealing lines, and the oil return port is provided on the inlet valve seat and is located between the two sealing lines; the inlet valve plate is connected to the inlet valve seat and abuts against the sealing lines; The relief valve comprises a main valve core and a piston ring which are slidably connected to the valve body, the main valve core comprises a large head section sleeved in the valve body and a small head section inserted into an opening at the bottom of the valve body, a damping hole is arranged at the bottom of the large head section, and an oil drain hole is arranged on the small head section; the piston ring is sleeved outside the large head section; The side wall of the valve body is provided with an overflow port which is controlled to open and close during the sliding process of the main valve core; The electromagnetic assembly comprises a tapered rod driven by magnetic force, and the end of the tapered rod contacts the small head section of the main valve core to seal the oil drain hole.

2. A shock absorber solenoid valve with a one-way oil return valve according to claim 1, characterized in that: The inlet valve plate is provided with an inlet hole and an inlet groove which match the oil inlet.

3. A shock absorber solenoid valve with a one-way oil return valve according to claim 2, characterized in that: The inlet valve sheet is provided with at least one layer.

4. A shock absorber solenoid valve with a one-way oil return valve according to claim 1, characterized in that: The oil drain hole includes a radial hole communicating with the space between the main valve core and the bottom of the valve body and an axial hole coaxially arranged with the small head section, and the axial hole is communicated with the radial hole.

5. A shock absorber solenoid valve with a one-way oil return valve according to claim 4, characterized in that: The overflow valve also includes a support valve seat fixedly connected to the valve body, and the support valve seat is placed between the throttle valve and the main valve core and is used to limit the main valve core.

6. A shock absorber solenoid valve with a one-way oil return valve according to claim 1, characterized in that: The throttle valve comprises a throttle valve seat and a throttle valve plate. The throttle hole on the throttle valve seat cooperates with the throttle groove on the throttle valve plate to form a normally open throttle channel with adjustable flow.

7. A shock absorber solenoid valve with a one-way oil return valve according to claim 1, characterized in that: The electromagnetic assembly includes an integrated yoke sleeve fixedly connected to the electromagnetic valve seat, a coil arranged in the integrated yoke sleeve, a moving iron core cooperating with the coil, a push rod fixedly connected to the moving iron core, and a pole shoe fixedly connected to the opening on the integrated yoke sleeve, the end of the push rod passes through the pole shoe and extends out of the integrated yoke sleeve, and the tapered rod is connected to the end of the push rod extending out of the integrated yoke sleeve.

8. A shock absorber solenoid valve with a one-way oil return valve according to claim 7, characterized in that: The end of the tapered rod is in a conical shape.

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