Automobile multi-coil opening and closing electromagnetic valve

Abstract

The invention belongs to the technical field of automobile vibration reduction, and provides an automobile multi-coil opening and closing electromagnetic valve which comprises a shell, a valve seat groove is formed in one side of the shell, a valve body is fixedly arranged in the valve seat groove, a secondary valve element cavity is formed in the end, located in the valve seat groove, of the valve body, a main valve element cavity is formed in the end, away from the valve seat groove, of the valve body, and a secondary valve element is slidably arranged in the secondary valve element cavity. A main valve element is slidably arranged in the main valve element cavity, a push rod hole communicated with the secondary valve element cavity is formed in the side, facing the secondary valve element cavity, of the shell, an electromagnetic push rod assembly is arranged in the shell, the moving end of the electromagnetic push rod assembly penetrates through the push rod hole to make contact with the secondary valve element, and a first coil is arranged on the circumferential inner wall of the secondary valve element cavity. A second coil is arranged on the inner wall of the cavity circumference of the main valve element. All the valve elements are driven to move through the electromagnetic coil, the response speed is high, the valve adapts to transient changes of complex road conditions, compared with a conventional mechanical spring, the service life is longer, and dynamic response blind areas under the continuous impact working condition can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile vibration reduction, in particular to an automobile multi-coil on-off solenoid valve. Background Art

[0002] With the rapid development of the new energy vehicle industry, demand for vehicle comfort is increasing significantly, placing higher demands on the dynamic response characteristics and shock absorption performance of suspension systems. The widely used CDC continuous damping control shock absorber in existing technology uses a solenoid valve-type damping adjustment device. Its core working mechanism is to achieve damping adjustment by changing the cross-sectional area of the oil channel through the axial displacement of the solenoid valve core.

[0003] Its shortcomings are: 1. Dynamic response hysteresis. The reset of the solenoid valve core relies entirely on the passive return of the mechanical spring. Its fixed elastic modulus cannot adapt to the transient changes of complex road conditions, resulting in a dynamic response blind spot under continuous impact conditions; 2. The valve core and valve body are closed due to the force exerted by the spring. When the road surface encounters continuous vibration, the spring will cause shaking, resulting in incomplete closure of the valve core; 3. The mechanical spring system will experience metal fatigue during long-term expansion and contraction, resulting in weakened rebound and compression effects. Summary of the Invention

[0004] In view of the defects in the prior art, the present invention provides an automobile multi-coil on-off solenoid valve to improve the problems of slow response and short service life of the solenoid valve in the prior art.

[0005] The present invention provides an automobile multi-coil opening and closing solenoid valve, which includes a shell fixed on a shock absorber, a valve seat groove being provided on the side of the shell facing the shock absorber, a valve body being fixedly provided in the valve seat groove, a secondary valve core cavity being provided at one end of the valve body located in the valve seat groove, a main valve core cavity being provided at one end of the valve body away from the valve seat groove, the main valve core cavity being connected with the secondary valve core cavity, a secondary valve core being slidingly arranged in the secondary valve core cavity, a main valve core being slidingly arranged in the main valve core cavity, a push rod hole being provided on the side of the shell facing the secondary valve core cavity, an electromagnetic push rod assembly being provided in the shell, the moving end of the electromagnetic push rod assembly passing through the push rod hole and contacting the secondary valve core, a first coil being provided on the inner wall of the secondary valve core cavity, and a second coil being provided on the inner wall of the main valve core cavity.

[0006] It can be seen from the above technical solution that the present invention drives the movement of each valve core through an electromagnetic coil, has a fast response speed, adapts to transient changes in complex road conditions, has a longer life than conventional mechanical springs, and can avoid dynamic response blind spots under continuous impact conditions.

[0007] Furthermore, the electromagnetic push rod assembly includes a rotating shaft rotatably installed in the shell, the axis of the rotating shaft is parallel to the sliding direction of the secondary valve core, and a number of mounting brackets are evenly fixed around the axis on the outer peripheral wall of the rotating shaft. A third coil is sleeved on the outside of the mounting bracket, and an electromagnetic push rod is slidably arranged inside the mounting bracket. The push rod hole is located on the rotation trajectory of the mounting bracket. When the mounting bracket rotates to the push rod hole position, the electromagnetic push rod can pass through the push rod hole and contact the secondary valve core.

[0008] The beneficial effect is that multiple sets of mounting frames and coils are installed in the shell, and during the debugging stage of the shock absorber, coils of different sizes can be quickly switched for experiments, thereby improving work efficiency.

[0009] Furthermore, the mounting frame includes two coaxially arranged cylinders connected by threads, the axis of the cylinders is parallel to the rotating shaft, and a retaining ring is fixedly connected to the outer wall of the two cylinders on the side away from each other. The third coil is sleeved on the cylinders and located between the two retaining rings, and the retaining ring close to the secondary valve core is fixedly connected to the rotating shaft.

[0010] The beneficial effect is that the staff can change the relative distance between the two retaining rings by rotating the cylinder, and clamp and fix the third coil of any size, which is convenient to use.

[0011] Furthermore, a detachable cover plate is provided on the side of the shell away from the secondary valve core, a telescopic rod is fixed on the inner side of the cover plate, the axis of the telescopic rod is coaxial with the push rod hole, the telescopic end of the telescopic rod points to the push rod hole and is fixedly connected to a pressure plate.

[0012] The beneficial effect is that the pressure plate is used to press and fix the mounting frame to prevent the mounting frame from rotating when the electromagnetic push rod is working. When the mounting frame is switched, different cylinders may have different lengths, and the extension and retraction of the telescopic rod can make the pressure plate always press the mounting frame.

[0013] Furthermore, the first coil is fixed to the inner wall of the secondary valve core cavity by means of high temperature resistant epoxy resin.

[0014] The beneficial effect is: ensuring insulation between the first coil and the valve body.

[0015] Furthermore, the second coil is fixed to the inner wall of the main valve core cavity through high-temperature resistant epoxy resin.

[0016] The beneficial effect is: ensuring insulation between the second coil and the valve body.

[0017] Furthermore, outer walls of the secondary valve core and the main valve core are coated with a molybdenum disulfide solid lubricating coating.

[0018] The beneficial effects are: reducing the friction coefficient, facilitating the sliding of the secondary valve core and the main valve core, and avoiding sticking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for the specific embodiments or the prior art description. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0020] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 Schematic diagram of oil flow of the present invention; Figure 3 is a schematic diagram of the housing of the present invention; Figure 4 is a schematic diagram of a cover plate of the present invention; Figure 5 is a schematic diagram of the mounting frame of the present invention; Figure 6 Schematic diagram of the valve body of the present invention; Figure 7 This is a schematic diagram of the secondary valve core of the present invention; Figure 8 is a schematic diagram of the end cover of the present invention; Figure 9 A schematic diagram of a flow valve seat of the present invention; Figure 10 It is a schematic diagram of the elastic spring of the present invention.

[0021] Reference numerals: 1. Housing; 2. Valve seat groove; 3. Valve body; 4. Secondary valve core cavity; 5. Main valve core cavity; 6. Secondary valve core; 7. Main valve core; 8. First coil; 9. Second coil; 10. Rotating shaft; 11. Third coil; 12. Solenoid push rod; 13. Mounting bracket; 14. Push rod hole; 15. Cover plate; 16. Telescopic rod; 17. Pressure plate; 18. End cover; 19. Flow valve seat; 20. Elastic reed; 21. Motor.

[0022] 3a, oil outlet hole; 3b, reflux groove; 3c, connecting groove; 6a, second throttle hole; 6b, lower boss; 6c, upper boss; 7a, first throttle hole; 7b, first annular groove; 13a, cylinder; 13b, retaining ring; 18a, oil inlet hole; 18b, second annular groove; 18c, transition groove; 19a, outer ring platform; 19b, inner ring platform; 19c, third throttle hole; 20a, outer ring; 20b, inner ring; 20c, cantilever. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0024] Example 1 like Figures 1 to 10 As shown, a multi-coil opening and closing solenoid valve for an automobile includes a shell 1 fixed on a shock absorber, a valve seat groove 2 is provided on the side of the shell 1 facing the shock absorber, a valve body 3 is fixed in the valve seat groove 2, a secondary valve core cavity 4 is provided at one end of the valve body 3 located in the valve seat groove 2, a main valve core cavity 5 is provided at the end of the valve body 3 away from the valve seat groove 2, the main valve core cavity 5 is communicated with the secondary valve core cavity 4, a secondary valve core 6 is slidably arranged in the secondary valve core cavity 4, and a main valve core 7 is slidably arranged in the main valve core cavity 5, a push rod hole 14 is provided on the side of the shell 1 facing the secondary valve core cavity 4 and communicated with the secondary valve core cavity 4, an electromagnetic push rod assembly is provided in the shell 1, the moving end of the electromagnetic push rod assembly passes through the push rod hole 14 and contacts the secondary valve core 6, a first coil 8 is provided on the inner wall of the secondary valve core cavity 4, and a second coil 9 is provided on the inner wall of the main valve core cavity 5.

[0025] In this embodiment, the solenoid valve housing 1 is mounted on one side of the shock absorber and communicates with the oil chamber in the shock absorber. An end cap 18 is provided on the side of the main valve core chamber 5 facing the shock absorber. A flow valve seat 19 is fixedly provided between the secondary valve core chamber 4 and the main valve core chamber 5. The flow valve seat 19 separates the secondary valve core chamber 4 from the main valve core chamber 5. An elastic reed 20 is also installed on the side of the flow valve seat 19 facing the secondary valve core chamber 4. like Figure 1 As shown, a first throttle hole 7a is provided at the center of the main valve core 7, and a first annular groove 7b is provided on the end surface of the main valve core 7 facing the end cover 18; like Figure 6 As shown, the outer wall of the valve body 3 near the main valve core cavity 5 is evenly provided with oil outlet holes 3a, which are connected to the main valve core cavity 5. The outer wall of the valve body 3 near the secondary valve core cavity is provided with a reflux groove 3b and a connecting groove 3c. like Figure 7 As shown, a second throttle hole 6a is formed on the secondary valve core 6, a lower boss 6b is fixedly provided on the side of the secondary valve core 6 facing the elastic reed 20, and an upper boss 6c is fixedly provided on the side of the secondary valve core 6 facing the push rod hole 14, which contacts the electromagnetic push rod assembly. The upper boss 6c can extend into the push rod hole 14 and is flush with the inner wall of the housing 1; like Figure 8As shown, the end cover 18 is provided with an oil inlet hole 18a, and the side of the end cover 18 facing the main valve core 7 is provided with a second annular groove 18b, and a transition groove 18c connecting the oil inlet hole 18a and the second annular groove 18b. The second annular groove 18b cooperates with the first annular groove 7b to form a chamber; like Figure 9 As shown, the end of the flow valve seat 19 facing the secondary valve core cavity 4 is fixed with an outer ring platform 19a, an inner ring platform 19b and a third throttle hole 19c; like Figure 10 As shown, the elastic spring 20 includes an outer ring portion 20a, an inner ring portion 20b and a cantilever 20c. The outer ring portion 20a is fixedly connected to the outer ring platform 19a, and the inner ring portion 20b is located above the inner ring platform 19b. In the initial state, there is a certain gap between the inner ring portion 20b and the inner ring platform 19b. like Figure 2 As shown, when no power is applied, the oil in the shock absorber enters the end cover 18 through the oil inlet hole 18a of the end cover 18 and has two movement paths. The oil flows to P1: the oil enters the second annular groove 18b through the transition groove 18c. The oil pressure in the annular groove 18b pushes the main valve core 7 to move upward. The oil in the annular groove 18b is connected to the oil outlet hole 3a, and the oil flows back to the shock absorber through the oil outlet hole 3a. Oil flow direction P2: The oil enters the main valve core chamber 5 through the first throttle hole 7a, then flows to the secondary valve core chamber 4 through the third throttle hole 19c of the flow valve seat 19 and the gap between the elastic reed 20, and then flows to the upper part of the secondary valve core chamber 4 through the second throttle hole 6a of the secondary valve core 6, and finally flows out from the reflux groove 3b and the connecting groove 3c of the valve body 3, and flows back to the shock absorber.

[0026] When power is on, the electromagnetic push rod assembly pushes the secondary valve core 6 to move downward, and the lower part of the secondary valve core 6 presses against the inner ring portion 20b of the elastic spring 20. After the inner ring portion 20b is deformed and pressed down to fit the inner ring platform 19b, the third throttle hole 19c is closed. The oil pressure in the main valve core chamber 5 becomes larger and larger until the oil pressure is greater than the thrust of the electromagnetic push rod assembly. The oil pushes the elastic spring 20 away, and the third throttle hole 19c circulates again. By changing the cross-sectional area of the oil channel, the flow rate of the oil is adjusted to achieve different damping effects.

[0027] In addition, the second coil 9 is not energized in the initial state. After the main valve core 7 is lifted up by the oil, the second coil 9 can be energized to drive the main valve core 7 to move downward to reset and close the oil outlet 3a. In addition, the first coil 8 is not energized under normal conditions, and the electromagnetic push rod assembly pushes the secondary valve core 6 to move downward, compressing the elastic spring 20 to deform. After the electromagnetic push rod assembly is powered off, the elastic spring 20 elastically resets and supports the secondary valve core 6. When the first coil 8 is energized, it pushes the secondary valve core 6 to move upward, and the upper boss 6c extends into the push rod hole 14, pushing the electromagnetic push rod assembly back into the housing 1, making it easy to replace the electromagnetic push rod.

[0028] The present invention drives each valve core to move through an electromagnetic coil, has a fast response speed, adapts to transient changes in complex road conditions, has a longer service life than conventional mechanical springs, and can avoid dynamic response blind spots under continuous impact conditions.

[0029] Example 2 like Figures 3 to 5 As shown, preferably, on the basis of Example 1, the electromagnetic push rod assembly includes a rotating shaft 10 rotatably installed in the shell 1, the axis of the rotating shaft 10 is parallel to the sliding direction of the secondary valve core 6, and a number of mounting brackets 13 are evenly fixed around the axis on the outer peripheral wall of the rotating shaft 10, and the mounting brackets 13 are each sleeved with a third coil 11, and the mounting brackets 13 are each slidably provided with an electromagnetic push rod 12, and the push rod hole 14 is located on the rotation trajectory of the mounting bracket 13. When the mounting bracket 13 rotates to the position of the push rod hole 14, the electromagnetic push rod 12 can pass through the push rod hole 14 and contact the secondary valve core 6.

[0030] The mounting frame 13 includes two coaxially arranged cylinders 13a connected by threads, the axes of the cylinders 13a are parallel to the rotating shaft 10, and retaining rings 13b are fixedly connected to the outer walls of the two cylinders 13a on the sides away from each other. The third coil 11 is sleeved on the cylinders 13a and located between the two retaining rings 13b. The retaining ring 13b on the side close to the secondary valve core 6 is fixedly connected to the rotating shaft 10.

[0031] A detachable cover plate 15 is provided on the side of the housing 1 away from the secondary valve core 6, and a telescopic rod 16 is fixedly provided on the inner side of the cover plate 15. The axis of the telescopic rod 16 is coaxial with the push rod hole 14, and the telescopic end of the telescopic rod 16 points to the push rod hole 14 and is fixedly connected to a pressure plate 17.

[0032] In this embodiment, the shock absorber is an important component of the vehicle, and the vibration reduction effect is directly related to the ride comfort of the vehicle, so it needs to be debugged multiple times; The cylinders 13a on the side of all mounting brackets 13 close to the secondary valve core 6 are fixedly connected to the rotating shaft 10. Therefore, by twisting the cylinder 13a on the side away from the secondary valve core 6, the two cylinders 13a can be spirally separated, and the third coil 11 is installed on the cylinder 13a. When the cylinder 13a is screwed back again, the two retaining rings 13b approach each other to clamp the third coil 11. By changing the relative distance between the two retaining rings 13b, the third coil 11 of any size can be clamped and fixed; The magnetic force of the coil is determined by multiple factors such as the current intensity, the number of coil turns, and the coil shape. Different third coils 11 are installed on different mounting brackets. When it is necessary to switch coils of different sizes, the first coil 8 is energized to push the secondary valve core 6 upward, and the upper boss 6c extends into the push rod hole 14, pushing the electromagnetic push rod 12 back into the shell 1. Then the rotating shaft 10 can be rotated to rotate the other mounting bracket 13 to the corresponding position of the push rod hole 14. The first coil 8 is de-energized, and the switched third coil 11 is energized. The switched electromagnetic push rod 12 can push the secondary valve core 6 downward.

[0033] Specifically, a motor 21 is further provided in the housing 1 , and an output shaft of the motor 21 is power-connected to the rotating shaft 10 .

[0034] Specifically, since the sizes of the different third coils 11 are different, the threaded engagement lengths of the two cylinders 13a of the mounting frame 13 are different, and thus the relative distances between the retaining rings 13b at both ends of the mounting frame 13 are also different; Before switching the third coil 11 of different sizes, it is necessary to start the telescopic rod 16. The telescopic rod 16 is located just above the push rod hole 14. The telescopic rod 16 retracts, driving the pressure plate 17 away from the mounting bracket 13. After rotating and switching to a new mounting bracket 13, the telescopic rod 16 is started again. The telescopic rod 16 extends, driving the pressure plate 17 to press the corresponding mounting bracket 13, thereby fixing the mounting bracket to prevent movement.

[0035] In addition, a ring groove for limiting is formed on the side of the pressure plate 17 facing the retaining ring 13b.

[0036] Example 3 like Figures 1 to 2 As shown, preferably, on the basis of embodiment 1-2, the first coil 8 is fixed to the inner wall of the secondary valve core cavity 4 by means of high temperature resistant epoxy resin.

[0037] The second coil 9 is fixed to the inner wall of the main valve core cavity 5 by high temperature resistant epoxy resin.

[0038] The outer walls of the secondary valve core 6 and the main valve core 7 are coated with a molybdenum disulfide solid lubricating coating.

[0039] In this embodiment, the first coil 8 and the second coil 9 are coated with high temperature resistant epoxy resin to achieve insulation.

[0040] In addition, the molybdenum disulfide solid lubricating coating is used to reduce the friction coefficient, facilitate the sliding of the secondary valve core 6 and the main valve core 7, and avoid sticking.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An automotive multi-coil on-off solenoid valve, characterized in that: The invention comprises a shell (1) fixed on the shock absorber, wherein a valve seat groove (2) is provided on the side of the shell (1) facing the shock absorber, a valve body (3) is fixedly provided in the valve seat groove (2), a secondary valve core cavity (4) is provided at one end of the valve body (3) located in the valve seat groove (2), a main valve core cavity (5) is provided at one end of the valve body (3) away from the valve seat groove (2), the main valve core cavity (5) is communicated with the secondary valve core cavity (4), and a secondary valve core (6) is slidably provided in the secondary valve core cavity (4). A main valve core (7) is slidingly provided in the main valve core cavity (5), a push rod hole (14) communicating with the secondary valve core cavity (4) is provided on the side of the housing (1) facing the secondary valve core cavity (4), an electromagnetic push rod assembly is provided in the housing (1), a moving end of the electromagnetic push rod assembly passes through the push rod hole (14) and contacts the secondary valve core (6), a first coil (8) is provided on the inner wall of the secondary valve core cavity (4), and a second coil (9) is provided on the inner wall of the main valve core cavity (5).

2. The automotive multi-coil on-off solenoid valve according to claim 1, characterized in that: The electromagnetic push rod assembly includes a rotating shaft (10) rotatably mounted in the housing (1), the axis of the rotating shaft (10) is parallel to the sliding direction of the secondary valve core (6), a plurality of mounting brackets (13) are evenly fixed around the axis on the outer peripheral wall of the rotating shaft (10), a third coil (11) is sleeved on the outside of the mounting brackets (13), an electromagnetic push rod (12) is slidably arranged in the mounting brackets (13), the push rod hole (14) is located on the rotation trajectory of the mounting bracket (13), and when the mounting bracket (13) rotates to the position of the push rod hole (14), the electromagnetic push rod (12) can pass through the push rod hole (14) and contact the secondary valve core (6).

3. The automotive multi-coil on-off solenoid valve according to claim 2, characterized in that: The mounting frame (13) includes two cylinders (13a) that are coaxially arranged and connected by threads, the axis of the cylinder (13a) is parallel to the rotating shaft (10), and a retaining ring (13b) is fixedly connected to the outer wall of the two cylinders (13a) on the side away from each other. The third coil (11) is sleeved on the cylinder (13a) and located between the two retaining rings (13b), and the retaining ring (13b) on the side close to the secondary valve core (6) is fixedly connected to the rotating shaft (10).

4. The automotive multi-coil on-off solenoid valve according to claim 3, characterized in that: A detachable cover plate (15) is provided on a side of the housing (1) away from the secondary valve core (6), and a telescopic rod (16) is fixedly provided on the inner side of the cover plate (15). The axis of the telescopic rod (16) is coaxial with the push rod hole (14), and the telescopic end of the telescopic rod (16) points to the push rod hole (14) and is fixedly connected to a pressure plate (17).

5. The automotive multi-coil on-off solenoid valve according to claim 1, characterized in that: The first coil (8) is fixed to the inner wall of the secondary valve core cavity (4) by means of high-temperature resistant epoxy resin.

6. The automotive multi-coil on-off solenoid valve according to claim 1, characterized in that: The second coil (9) is fixed to the inner wall of the main valve core cavity (5) by means of high-temperature resistant epoxy resin.

7. An automotive multi-coil on-off solenoid valve according to any one of claims 1 to 6, characterized in that: The outer walls of the secondary valve core (6) and the main valve core (7) are both coated with a molybdenum disulfide solid lubricating coating.

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