Electromagnetic actuating mechanism and electromagnetic valve

Abstract

The utility model relates to an electromagnetic actuating mechanism and an electromagnetic valve, the electromagnetic actuating mechanism is applied to a shock absorber, a coil, a magnetic conductive tube, a sliding block and an ejector rod are arranged in a cylinder, the magnetic conductive tube is cylindrical, the coil is sleeved on the magnetic conductive tube, the bottom of the magnetic conductive tube is provided with an inwards sunken mounting groove, and the sliding block is arranged on the mounting groove in a sliding and penetrating manner; the lower end of the slider is connected with the upper end of the ejector rod; the highest point of the magnetic conductive tube is higher than that of the coil, and the lowest point of the magnetic conductive tube is lower than that of the coil. The electromagnetic actuating mechanism and the electromagnetic valve have the advantages that the magnetic conductive pipe can completely cover the range of the coil, electromagnetic force of the sliding block at different positions is kept at a constant value through saturation, the sliding block works stably, then the ejector rod works stably, the sliding block can move more accurately under the constant electromagnetic force, and the electromagnetic actuating mechanism is more stable in operation. When a user adjusts the shock absorber, the adjustment accuracy can be guaranteed, especially for reset of adjustment, the electromagnetic force is constant, the sliding block can reset accurately, and the use experience feeling of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic actuator and a electromagnetic valve. Background Art

[0002] Prior art, such as Chinese utility model patent CN219317506U, discloses a solenoid valve with adjustable damping for a shock absorber. The valve comprises a valve sleeve, a main valve core, a main valve chamber, and a main return spring. The main valve core is provided with a first and a second one-way valve. The valve sleeve defines an oil outlet passage. A housing is mounted on the upper end of the valve sleeve, leaving an oil outlet gap between the bottom of the housing and the top of the valve sleeve. The valve sleeve is provided with a third and a fourth one-way valve. A pilot valve is located within the main valve chamber, connecting the oil outlet passage. The housing houses an electromagnetic drive assembly for operating the pilot valve. During compression, oil first passes through the first one-way valve and enters the pilot valve, which then opens the main valve core. During recovery, oil first passes through the second one-way valve and enters the pilot valve, which then opens the main valve core. However, the magnetic conductive tube only partially covers the coil, causing the electromagnetic force of the slider to vary at different positions, making it difficult to precisely adjust the slider's position and resulting in poor performance. Utility Model Content

[0003] An object of the present application is to provide an electromagnetic actuator and a solenoid valve, which can keep the electromagnetic force of the slider constant at different positions.

[0004] The technical solution adopted in this application is: an electromagnetic actuator, applied to a shock absorber, including a coil, a magnetic tube, a slider and a push rod. The coil, magnetic tube, slider and push rod are all located in a tube. The magnetic tube is cylindrical, and the coil is sleeved on the magnetic tube. The bottom of the magnetic tube is provided with an inwardly recessed mounting groove, and the slider can be slidably passed through the mounting groove; the lower end of the slider is connected to the upper end of the push rod; the highest point of the magnetic tube is higher than the highest point of the coil, and the lowest point of the magnetic tube is lower than the lowest point of the coil.

[0005] Compared with the existing technology, the advantage of the present application is that the magnetic tube can completely cover the range of the coil, and through saturation, the electromagnetic force of the slider is kept at a constant value at different positions, so that the slider works stably, and then the push rod works stably, and the opening of the pilot valve core can be stably controlled. Under the constant electromagnetic force, the movement of the slider can be more precise. When the user adjusts the shock absorber, the adjustment accuracy can be guaranteed, especially for the reset of the adjustment, the electromagnetic force is constant and the slider can be accurately reset.

[0006] In addition, it should be noted that in this solution, the coil, magnetic tube, slider and push rod are all located in the tube. The tube can be the tube structure of the shock absorber, thereby achieving the effect of reducing mass.

[0007] In some embodiments of the present application, a first through hole is provided in the center of the slider.

[0008] Furthermore, a magnetic isolation plate is provided at the upper end of the slider, and the magnetic isolation plate is connected to the top of the slider.

[0009] Furthermore, a first boss extending downward is provided at the center of the magnetic isolation plate, and an outer wall surface of the first boss cooperates with the first through hole.

[0010] Furthermore, a second through hole is provided on the first boss, and the second through hole is connected to the first through hole and the top of the magnetic isolation plate.

[0011] Furthermore, the magnetic isolation plate is provided with a second boss extending upward.

[0012] Furthermore, the top surface of the second boss is an arc surface.

[0013] Furthermore, the edge of the magnetic isolation plate is provided with a groove that is concave toward the center.

[0014] Furthermore, the first through hole includes an upper section and a lower section, and the upper section and the lower section are connected by a step surface.

[0015] Furthermore, the diameter of the lower section is greater than the diameter of the upper section.

[0016] Furthermore, the top of the push rod is arranged on the lower section.

[0017] Furthermore, a gap is provided between the portion of the push rod and the hole wall of the lower section.

[0018] In some embodiments of the present application, a partition is provided between the groove wall of the mounting groove and the slider.

[0019] In some embodiments of the present application, an upper sealing cover is provided on the top of the cylinder.

[0020] Furthermore, a third boss is provided on the top of the magnetic conductive tube, and a limiting groove is provided on the bottom of the upper sealing cover, and the third boss cooperates with the limiting groove.

[0021] In some embodiments of the present application, a tapered groove is provided on the side surface of the magnetic conductive tube.

[0022] Furthermore, the projection of the tapered groove on the vertical plane coincides with the projection of the coil on the vertical plane.

[0023] In some embodiments of the present application, a lower sealing cover is provided at the lower portion of the cylinder.

[0024] Furthermore, the lower sealing cover is annular as a whole.

[0025] Furthermore, an outward convex ring is provided at the bottom of the magnetic conductive tube, and the inner side surface of the lower sealing cover cooperates with the convex ring.

[0026] The utility model provides a solenoid valve, which comprises the above-mentioned electromagnetic actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0028] Figure 2 yes Figure 1 A magnified view of part A in FIG;

[0029] Figure 3 yes Figure 1 A magnified view of part B in FIG;

[0030] Figure 4 This is a schematic structural diagram of a magnetic isolation plate according to Example 1 of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the magnetic conductive tube of Example 1 of the present utility model.

[0032] In the figure: 31, push rod; 311, gap; 312, plane; 32, coil; 33, magnetic tube; 331, mounting groove; 332, third boss; 333, conical groove; 334, convex ring; 34, slider; 341, first through hole; 3411, upper section; 3412, lower section; 3413, step surface; 35, magnetic isolation plate; 351, first boss; 352, second through hole; 353, second boss; 354, groove; 36, partition; 5, cylinder; 51, upper sealing cover; 511, limiting groove; 52, lower sealing cover. DETAILED DESCRIPTION

[0033] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0034] Example 1:

[0035] This embodiment provides an electromagnetic actuator, such as Figure 1 As shown, it is applied to a shock absorber and includes a coil 32, a magnetic tube 33, a slider 34 and a push rod 31. The coil 32, the magnetic tube 33, the slider 34 and the push rod 31 are all located in the tube 5. The magnetic tube 33 is cylindrical. The coil 32 is sleeved on the magnetic tube 33. The bottom of the magnetic tube 33 is provided with an inwardly recessed mounting groove 331, and the slider 34 is slidably inserted into the mounting groove 331; the lower end of the slider 34 is connected to the upper end of the push rod 31; the highest point of the magnetic tube 33 is higher than the highest point of the coil 32, and the lowest point of the magnetic tube 33 is lower than the lowest point of the coil 32.

[0036] The magnetic tube 33 can completely cover the range of the coil 32. Through saturation, the electromagnetic force of the slider 34 is kept constant at different positions, so that the slider 34 works stably, and then the push rod 31 works stably. Under the constant electromagnetic force, the movement of the slider 34 can be more precise. When the user adjusts the shock absorber, the adjustment accuracy can be guaranteed, especially for the reset of the adjustment. The electromagnetic force is constant and the slider 34 can be reset accurately, thereby improving the user experience.

[0037] In order to ensure reliable movement of the slider 34, Figure 2 As shown, the slider 34 has a first through-hole 341 at its center. A magnetic isolation plate 35 is provided at the upper end of the slider 34 and is connected to the top of the slider 34. The first through-hole 341 connects the upper and lower sides of the slider 34, facilitating the flow of oil and balancing the upper and lower pressures on the slider 34, facilitating its movement. The design of the magnetic isolation plate 35 prevents the slider 34 from being stuck.

[0038] In order to ensure the reliability of the structure of the magnetic isolation plate 35, a first boss 351 extending downward is provided at the center of the magnetic isolation plate 35, and the outer wall surface of the first boss 351 cooperates with the first through hole 341; a second through hole 352 is provided on the first boss 351, and the second through hole 352 connects the first through hole 341 with the top of the magnetic isolation plate 35. In this embodiment, the magnetic isolation plate 35 is made of a material that will not be attracted by magnetic force. The design of the first boss 351 improves the structural strength of the magnetic isolation plate 35. The first boss 351 cooperates with the first through hole 341 to facilitate the connection between the magnetic isolation plate 35 and the slider 34; the second through hole 352 can connect the upper and lower parts and also play a damping role.

[0039] In order to ensure reliable oil flow, Figure 4 As shown, the magnetic isolation plate 35 is provided with a second upwardly extending boss 353; the top surface of the second boss 353 is a circular arc surface; and the edge of the magnetic isolation plate 35 is provided with a groove 354 that is recessed toward the center. The design of the second boss 353 improves the structural strength of the magnetic isolation plate 35, making the magnetic isolation plate 35 more stable when abutting the bottom of the mounting groove 331. At the same time, when the magnetic isolation plate 35 abuts the bottom of the mounting groove 331, a gap is left between the bottom of the mounting groove 331 and the magnetic isolation plate 35, facilitating the flow of oil. The top surface of the second boss 353 is a circular arc surface, which can reduce the resistance between the magnetic isolation plate 35 and the oil during movement. The design of the groove 354 can reduce the material used in the magnetic isolation plate 35, reducing its weight and facilitating molding.

[0040] In order to ensure the reliability of the first through hole 341, Figure 3As shown, the first through hole 341 includes an upper section 3411 and a lower section 3412, which are connected by a step surface 3413. The diameter of the lower section 3412 is larger than that of the upper section 3411. The top of the push rod 31 is set on the lower section 3412. A gap 311 is provided between the push rod 31 and the hole wall of the lower section 3412. Specifically, the push rod 31 is cylindrical as a whole, with a flat surface 312 on the side. The gap 311 is formed between the flat surface 312 and the hole wall of the lower section 3412. The push rod 31 and the lower section 3412 are interference fit. The design of the step surface 3413 can limit the deepest installation distance of the push rod 31. The gap 311 can connect the upper end 3411 with the bottom of the slider 34, so that the oil on both sides can be balanced.

[0041] In order to ensure reliable sliding of the slider 34, a partition 36 is provided between the groove wall of the mounting groove 331 and the slider 34. The design of the partition 36 can make the slider 34 slide more smoothly.

[0042] To ensure a reliable seal, an upper sealing cover 51 is installed on the top of the cylinder 5. A third boss 332 is provided on the top of the magnetic tube 33, and a retaining groove 511 is provided at the bottom of the upper sealing cover 51. The third boss 332 engages with the retaining groove 511. The design of the upper sealing cover 51 prevents oil from leaking from above. The third boss 332 cooperates with the retaining groove 511 to facilitate the positioning and installation of the magnetic tube 33.

[0043] like Figure 5 As shown, a tapered groove 333 is provided on the side surface of the magnetic tube 33 ; the projection of the tapered groove 333 on the vertical plane coincides with the projection of the coil 32 on the vertical plane.

[0044] To ensure a reliable seal, a lower sealing cover 52 is provided at the bottom of the cylinder 5. The lower sealing cover 52 is generally annular. The bottom of the magnetic tube 33 is provided with an outward-facing protrusion 334, and the inner side of the lower sealing cover 52 cooperates with the protrusion 334. Specifically, the inner side of the lower sealing cover 52 is stepped, and the protrusion 334 cooperates with one of the steps. The design of the lower sealing cover 52 prevents oil from coming into contact with the coil 32. The protrusion 334 cooperates with the step to facilitate the positioning and installation of the magnetic tube 33. Compared with traditional designs, the lower sealing cover 52 omits the circumferential outer portion of the coil 32 and uses the cylinder 5 as a partial component of the valve, saving material and reducing weight.

[0045] Example 2:

[0046] This embodiment provides a solenoid valve, which includes the electromagnetic actuator described in Example 1.

[0047] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An electromagnetic actuator, used in a shock absorber, characterized in that: The invention comprises a coil (32), a magnetic tube (33), a slider (34) and a push rod (31); the coil (32), the magnetic tube (33), the slider (34) and the push rod (31) are all located in a cylinder (5); the magnetic tube (33) is cylindrical; the coil (32) is sleeved on the magnetic tube (33); the bottom of the magnetic tube (33) is provided with an inwardly recessed mounting groove (331); the slider (34) is slidably inserted into the mounting groove (331); the lower end of the slider (34) is connected to the upper end of the push rod (31); the highest point of the magnetic tube (33) is higher than the highest point of the coil (32); and the lowest point of the magnetic tube (33) is lower than the lowest point of the coil (32).

2. The electromagnetic actuator according to claim 1, wherein: A first through hole (341) is provided at the center of the slider (34); a magnetic isolation plate (35) is provided at the upper end of the slider (34), and the magnetic isolation plate (35) is connected to the top of the slider (34).

3. The electromagnetic actuator according to claim 2, wherein: A first boss (351) extending downward is provided at the center of the magnetic isolation plate (35), and the outer wall surface of the first boss (351) cooperates with the first through hole (341); a second through hole (352) is provided on the first boss (351), and the second through hole (352) communicates with the first through hole (341) and the top of the magnetic isolation plate (35).

4. The electromagnetic actuator according to claim 2, wherein: The magnetic isolation plate (35) is provided with a second boss (353) extending upward; the top surface of the second boss (353) is an arc surface; and the edge of the magnetic isolation plate (35) is provided with a groove (354) recessed toward the center.

5. The electromagnetic actuator according to claim 2, wherein: The first through hole (341) includes an upper section (3411) and a lower section (3412), the upper section (3411) and the lower section (3412) being connected via a stepped surface (3413); the diameter of the lower section (3412) is larger than the diameter of the upper section (3411); the top of the push rod (31) is arranged on the lower section (3412); and a gap (311) is provided between a portion of the push rod (31) and the hole wall of the lower section (3412).

6. The electromagnetic actuator according to claim 1, wherein: A partition plate (36) is provided between the groove wall of the installation groove (331) and the slider (34).

7. The electromagnetic actuator according to claim 1, characterized in that: An upper sealing cover (51) is provided on the top of the cylinder (5); a third boss (332) is provided on the top of the magnetic tube (33); a limiting groove (511) is provided on the bottom of the upper sealing cover (51); and the third boss (332) cooperates with the limiting groove (511).

8. The electromagnetic actuator according to claim 1, characterized in that: A conical groove (333) is provided on the side surface of the magnetic conductive tube (33); the projection of the conical groove (333) on the vertical plane coincides with the projection of the coil (32) on the vertical plane.

9. The electromagnetic actuator according to claim 1, characterized in that: A lower sealing cover (52) is provided at the lower portion of the cylinder (5); the lower sealing cover (52) is annular in shape as a whole; an outward convex ring (334) is provided at the bottom of the magnetic tube (33), and the inner side surface of the lower sealing cover (52) cooperates with the convex ring (334).

10. A solenoid valve, characterized in that: It comprises an electromagnetic actuator as claimed in any one of claims 1 to 9.

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