Electromagnet for an electronically controlled shock absorber

Abstract

The utility model relates to the technical field of automobile suspension, specifically is an electromagnet of electric control shock absorber, include: core, coil, exhaust base, valve seat, flux core and flux cap, the valve seat top is connected with exhaust base, the exhaust base top fixedly connected with flux core, the flux core outside fixedly has the coil, the flux core middle part is equipped with the flux cap, the core passes through the flux cap and the core is in the flux core and slides, the spring no.

Description

Technical Field

[0001] This utility model relates to the field of automotive suspension technology, specifically to an electromagnet for an electronically controlled shock absorber. Background Technology

[0002] The vehicle suspension system is a core component affecting ride comfort and handling stability, with shock absorbers playing a crucial role. Traditional passive shock absorbers have fixed damping characteristics, making them unable to adapt to varying road conditions and driving demands. Therefore, electronically controlled shock absorber technology has emerged, achieving a balance between comfort and sportiness by adjusting damping force in real time. In this technology, the electromagnet serves as the core electronic control actuator, and its performance directly determines the shock absorber's response speed, control precision, and operational reliability. Currently, the industry commonly uses proportional valves or on / off valves driven by electromagnets to control the on / off state of the shock absorber's oil circuit and the amount of pressure relief, thereby adjusting the damping force.

[0003] However, the magnetic components inside the electromagnets of existing electronically controlled vibration dampers are prone to residual magnetization after long-term operation, causing the core to stick to adjacent components. This magnetization and adhesion results in incomplete reset or delayed response of the electromagnet after power failure, severely compromising the linearity and accuracy of control and causing inaccurate damper stiffness adjustment. Secondly, during the assembly and lubrication process of the vibration damper, residual gas is easily left inside the electromagnet. Due to the lack of a dedicated venting design in traditional electromagnet structures, this residual gas is compressed during vibration damper operation, forming "air resistance." This not only produces abnormal noise and affects NVH performance but also leads to damping force fluctuations and control inaccuracies, reducing product reliability and consistency and hindering further improvements in the performance of electronically controlled vibration dampers.

[0004] Therefore, there is an urgent need to develop an electromagnet for an electronically controlled vibration damper to solve the above problems. Utility Model Content

[0005] This invention relates to an electromagnet for an electronically controlled vibration damper. By setting a flux core with a limit ring groove, this invention effectively prevents magnetization and adhesion, and can automatically expel the gas inside the electromagnet at the beginning of the vibration damper's operation, thus effectively solving the aforementioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electromagnet for an electronically controlled vibration damper, comprising: an iron core, a coil, an exhaust base, a valve seat, a flux core, and a flux cap. The exhaust base is connected above the valve seat, and the flux core is fixedly connected above the exhaust base. A coil is fixedly sleeved on the outside of the flux core. A flux cap is provided in the middle of the flux core. The iron core passes through the flux cap and slides within the flux core. A first spring is provided below the flux cap, and a second spring is provided at the bottom of the flux core. The first spring and the second spring interact with the iron core.

[0007] Preferably, the flux core has a limiting annular groove in the middle, and an air hole is provided on one side of the bottom of the flux core.

[0008] Preferably, the exhaust base has a horizontal through hole on one side and a vertical positioning hole.

[0009] Preferably, the bottom air hole of the flux core corresponds to the position of the transverse through hole, and the air hole and the transverse through hole discharge the gas inside the device.

[0010] Preferably, a bushing is provided between the flux core and the iron core, and a bushing is provided between the iron core and the flux cap.

[0011] Preferably, a limiting block is provided below the flow cap, the iron core is fixedly connected to the limiting block, a spring one is movably connected between the flow cap and the limiting block, and a spring two is movably connected between the iron core and the flow core, and the stiffness of the spring one and the spring two is adjustable.

[0012] Preferably, a limiting post is provided on one side of the valve seat, the limiting post abuts against the coil, the positioning hole matches the limiting post to limit the exhaust base, and a wire harness is provided at the bottom of the valve seat, the wire harness being electrically connected to the coil.

[0013] Preferably, the electromagnet is provided with a sleeve on the outside, a flow seat is provided inside the sleeve, a core rod is provided inside the flow seat, and the upper end of the iron core is movably connected to the core rod.

[0014] Preferably, a sealing ring is fixedly connected between the valve seat and the sleeve, a sealing ring is fixed between the upper end of the exhaust base and the sleeve, a sealing ring is fixed between the flow core and the sleeve, and a sealing ring is fixed between the exhaust base and the flow core.

[0015] Preferably, the upper end of the core rod is connected to the flow seat, the core rod slides inside the flow seat, and the core rod and the flow seat are made of non-magnetic material.

[0016] Beneficial effects

[0017] This utility model provides an electromagnet for an electronically controlled vibration damper, which has the following advantages compared with the existing technology:

[0018] This utility model's flux core adopts a limit ring groove structure, and the core rod and flux seat are made of non-magnetic materials, which effectively avoids the problem of residual magnetization. The sliding fit relationship of the iron core in the flux core and the possible anti-magnetization treatment together ensure that the movement of the iron core is only controlled by the coil current, the response is extremely fast, and the output force value is highly linearly related to the current, thus laying a solid foundation for the vibration damper to achieve precise and continuous damping control.

[0019] This invention innovatively introduces a dedicated exhaust passage consisting of an exhaust base and air holes at the bottom of the flux core. Gas can be smoothly discharged from the valve body through the channel formed by the air holes at the bottom of the flux core and the transverse through-holes on the side of the exhaust base. This ensures that residual gas inside the electromagnet can be quickly and completely eliminated during the initial working stage of the shock absorber, completely avoiding the occurrence of "air resistance". This not only eliminates abnormal noise caused by air resistance, but also eliminates the risk of inaccurate damping force control, greatly improving the product's working stability and long-term reliability.

[0020] The electromagnet of this invention features a rational structural layout and high integration. A double-spring reset mechanism, consisting of a spring one located below the flux cap and a spring two at the bottom of the flux core, works together on the iron core to ensure timely and reliable reset after power failure. This double-spring design not only allows for adjustable reset force but also enables adaptation to different specifications of damper valve systems by selecting springs of varying stiffness, achieving optimal matching and control precision. It also ensures smooth guidance of the iron core's movement and excellent sealing performance in high-pressure hydraulic environments, resulting in a compact, durable, and long-lasting electromagnet structure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 This is a unfolded view of the components of this utility model;

[0025] Figure 4 This is a cross-sectional view of the present invention in its installed state;

[0026] In the picture:

[0027] 1. Iron core, 2. Coil, 3. Spring 1, 4. Spring 2

[0028] 5. Exhaust base, 501. Horizontal through hole, 502. Positioning hole.

[0029] 6. Valve seat, 601. Limit pin,

[0030] 7. Flux core, 701. Pores, 702. Limiting ring groove.

[0031] 8. Flux cap, 9. Bushing, 10. Limiting block, 11. Sealing ring, 12. Wiring harness, 13. Flow seat, 14. Core rod, 15. Sleeve. Detailed Implementation

[0032] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. The technical solutions of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0033] like Figure 1-4 As shown, the electromagnet of the electronically controlled vibration damper provided by the present invention is a compact actuator that integrates automatic exhaust, anti-magnetization adhesion and adjustable reset functions.

[0034] In some embodiments, the electromagnet's skeleton structure mainly includes a valve seat 6, an exhaust base 5, and a flow core 7 from bottom to top. The valve seat 6 serves as a basic mounting platform, and the exhaust base 5 is fixedly connected to it by screws or interference fit. A horizontal through hole 501 is provided on one side of the exhaust base 5, which penetrates the side wall of the base for gas discharge. At the same time, a vertical positioning hole 502 is provided on the base for cooperating with the limiting post 601 on the valve seat 6 to achieve circumferential positioning and prevent rotation during operation.

[0035] In some embodiments, a flux core 7 is fixedly connected to the top of the exhaust base 5. On one side of the bottom of the flux core 7, the exhaust base 5 is made of insulating material, and a vent 701 is also provided corresponding to the position of the transverse through hole 501 of the exhaust base 5. These two holes together form an exhaust path that runs through the interior of the electromagnet. A coil 2 is fixedly sleeved on the outside of the flux core 7. The coil 2 abuts against the limiting post 601, which is made of conductive material, so that the coil 2 is electrically connected to the wire harness 12 led out from the bottom of the valve seat 6, which supplies power to the coil 2. The operating current is usually in the range of 0.3A to 1.6A, and the resistance of the coil 2 is about 4Ω, forming a proportional electromagnet.

[0036] In some embodiments, within the central cavity of the flow core 7, a flow cap 8, an iron core 1, and a spring 4 are arranged from top to bottom. The iron core 1 can slide axially within the inner cavity of the flow core 7. To ensure smooth sliding and reduce wear, bushings 9 are press-fitted between the flow core 7 and the iron core 1, and between the iron core 1 and the flow cap 8. The bushings 9 serve a positioning and limiting function, ensuring that the iron core 1 always moves smoothly on a specific axis and preventing uneven wear.

[0037] In some embodiments, this utility model adopts a double-spring design. A limiting block 10 is provided below the flow cap 8. Spring 1 3 is movably connected between the flow cap 8 and the limiting block 10. The iron core 1 and the limiting block 10 are fixed by riveting. At the same time, between the bottom of the iron core 1 and the bottom surface of the inner cavity of the flow core 7, there is a movably connected spring 2 4. Spring 1 3 and spring 2 4 act together on the iron core 1 to form a balanced reset force system. During the operation, the iron core 1 is always subjected to two opposite forces in two directions: downward force from spring 1 3 and upward force from spring 2 4. In the power-off state, the resultant force of the two springs drives the iron core 1 to quickly return to a precise initial equilibrium position. By selecting springs with different stiffness coefficients, the ejection force and reset characteristics of the iron core 1 can be precisely adjusted, thereby achieving optimal matching with different damper valve systems.

[0038] In some embodiments, to prevent magnetization adhesion, the present invention employs dual anti-puncture measures. First, the flux core 7 itself is provided with a limit ring groove 702, and the residual magnetism is reduced through optimized magnetic circuit design. Second, the external valve core assembly that is linked and cooperates with the iron core 1, namely the core rod 14 and the flow seat 13, are both made of non-magnetic materials (such as austenitic stainless steel, copper alloy, etc.), which physically cuts off the path for magnetic circuit closure to form an adsorption force, fundamentally preventing the iron core 1 from sticking to the core rod 14 due to residual magnetism.

[0039] In some embodiments, the entire electromagnet assembly is encapsulated within a sleeve 15. Sealing rings 11 are fixed between the valve seat 6 and the sleeve 15, between the upper end of the exhaust base 5 and the sleeve 15, between the flow core 7 and the sleeve 15, and between the exhaust base 5 and the flow core 7. This multi-seal system ensures that the electromagnet will not leak after being immersed in the high-pressure oil of the shock absorber, thus guaranteeing the normal operation of the shock absorber.

[0040] The working process of this utility model is as follows: When it is necessary to adjust the damping of the shock absorber, a control current is applied to the coil 2 through the wire harness 12. The current generates a magnetic field, which drives the iron core 1 to slide upward in the flow core 7 against the pressure of the spring 3 and the spring 4. The upper end of the iron core 1 pushes the core rod 14 to slide in the flow seat 13, changing the gap between the two end faces, thereby adjusting the pressure relief area of ​​the oil circuit. The larger the current, the greater the electromagnetic force, the greater the displacement of the iron core 1, the larger the pressure relief area, and the smaller the damping force exhibited by the shock absorber, and vice versa. By continuously adjusting the current, the stepless adjustment of the damping force can be achieved. When the shock absorber is working for the first time, the oil inside is immersed in the electromagnet. The gas originally present in the valve is driven by the hydraulic pressure of the oil and discharged to the outside of the sleeve 15 through the air hole 701 at the bottom of the flow core 7 and the transverse through hole 501 of the exhaust base 5, completely eliminating the risk of air resistance.

[0041] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. For those skilled in the art to which the present invention pertains, simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered as falling within the scope of patent protection determined by the submitted claims.

Claims

1. An electromagnet for an electronically controlled vibration damper, characterized in that, include: The system comprises an iron core, a coil, an exhaust base, a valve seat, a flow core, and a flow cap. An exhaust base is connected above the valve seat, and a flow core is fixedly connected above the exhaust base. A coil is fixedly sleeved on the outside of the flow core. A flow cap is provided in the middle of the flow core. The iron core passes through the flow cap and slides within the flow core. A first spring is provided below the flow cap, and a second spring is provided at the bottom of the flow core. The first spring and the second spring interact with the iron core.

2. The electromagnet of the electronically controlled vibration damper according to claim 1, characterized in that, The flux core has a limiting annular groove in the middle, and an air hole is provided on one side of the bottom of the flux core.

3. The electromagnet of the electronically controlled vibration damper according to claim 2, characterized in that, The exhaust base has a horizontal through hole on one side and a vertical positioning hole.

4. The electromagnet of the electronically controlled vibration damper according to claim 3, characterized in that, The bottom air hole of the flux core corresponds to the position of the transverse through hole, and the air hole and the transverse through hole discharge the gas inside the device.

5. The electromagnet of the electronically controlled vibration damper according to claim 1, characterized in that, A bushing is provided between the flux core and the iron core, and a bushing is provided between the iron core and the flux cap.

6. The electromagnet of the electronically controlled vibration damper according to claim 1, characterized in that, A limiting block is provided below the flow cap. The iron core is fixedly connected to the limiting block. A spring is movably connected between the flow cap and the limiting block. A spring is movably connected between the iron core and the flow core. The stiffness of the spring is adjustable.

7. The electromagnet of the electronically controlled vibration damper according to claim 3, characterized in that, A limiting post is provided on one side of the valve seat. The limiting post abuts against the coil. The positioning hole matches the limiting post to limit the exhaust base.

8. The electromagnet of the electronically controlled vibration damper according to claim 1, characterized in that, The electromagnet has a sleeve on its outer side, a flow seat inside the sleeve, a core rod inside the flow seat, and the upper end of the iron core is movably connected to the core rod.

9. The electromagnet of the electronically controlled vibration damper according to claim 8, characterized in that, A sealing ring is fixedly connected between the valve seat and the sleeve, a sealing ring is fixed between the upper end of the exhaust base and the sleeve, a sealing ring is fixed between the flow core and the sleeve, and a sealing ring is fixed between the exhaust base and the flow core.

10. The electromagnet of the electronically controlled vibration damper according to claim 8, characterized in that: The upper end of the core rod is connected to the flow seat, and the core rod slides inside the flow seat. Both the core rod and the flow seat are made of non-magnetic material.

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