Pilot valve

Abstract

The invention relates to the technical field of external valves of automobile shock absorbers, and discloses a pilot valve which comprises a liquid passing cover, a special-shaped gasket is connected to the lower portion of the liquid passing cover, an oil passing groove is formed in the special-shaped gasket, the oil passing groove is of a cross structure, and the end of the cross groove is the end of the special-shaped gasket. According to the pilot valve, the oil passing groove is additionally formed in the special-shaped gasket and penetrates through the special-shaped gasket, compared with an existing oil passing groove, the area of the oil passing groove is larger, the oil passing speed is higher, liquid flowing is more convenient, the overall end cap is reduced by 1.5 mm, the axial size occupied by an external valve is further reduced, the rigidity of the special-shaped spring piece is improved, and the service life of the pilot valve is prolonged. According to the pilot valve connector, a pilot valve and a connector are combined into a whole, on the premise that the performance is met, the axial size is reduced, a belleville spring and two special adjusting washers are added, and the better damping effect of the shock absorber is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of external valves for automobile shock absorbers, in particular to a pilot valve. Background Art

[0002] Shock absorbers are widely used in automobiles to accelerate the attenuation of frame and body vibrations to improve the smoothness of the car's ride. When passing through uneven roads, although the shock-absorbing spring can filter the vibration of the road, the spring itself will still have reciprocating motion, and the shock absorber is used to suppress this spring jump. Therefore, in order to quickly attenuate the vibration of the frame and body and improve the smoothness and comfort of the car's ride, shock absorbers are generally installed on the car suspension system.

[0003] The shock absorber solenoid valve is an electronic component used to control the damping force of the shock absorber. It adjusts the movement of the shock absorber piston by receiving electrical signals, thereby achieving precise control of the shock absorber performance. The principle of the automobile shock absorber solenoid valve is to utilize the principle of electromagnetic induction. When the electromagnetic coil is energized, a certain magnetic field will be generated. This magnetic field will attract the pressure of the various components of the solenoid valve to change, and the shock absorber piston will move, thereby changing the damping force of the shock absorber. The pilot valve is indispensable in the solenoid valve.

[0004] In the prior art, the pilot valve component still has certain defects.

[0005] It can be seen that a pilot valve is needed to improve the shortcomings of the pilot valve in the prior art. Summary of the invention

[0006] The object of the present invention is to provide a pilot valve to solve the problem of the shortcomings of the pilot valve in the prior art mentioned in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a pilot valve comprises a liquid-passing cover, a special-shaped gasket is connected to the bottom of the liquid-passing cover, and an oil-passing groove is arranged on the special-shaped gasket, the oil-passing groove is a cross structure, and the end of the cross groove is the end of the special-shaped gasket, and a gasket A, a valve plate, a valve plate A, an inner multi-groove valve plate, a gasket B, and a special-shaped spring plate are arranged in sequence below the special-shaped gasket, and an end cap is arranged at the middle position of the gasket A, the valve plate, the valve plate A, the inner multi-groove valve plate, the gasket B, and the special-shaped spring plate, and a reflux valve seat is connected to the bottom of the end cap, and this structure constitutes a shock absorber safety mode; A liquid-passing shaft is connected below the reflux valve seat, and a first valve plate A and an outer multi-groove valve plate A are arranged above the outer side of the liquid-passing shaft, a first gasket and a second gasket are arranged below the outer side of the liquid-passing shaft, and a butterfly spring plate is arranged outside the first gasket and the second gasket, a sealing valve plate is installed outside the butterfly spring plate, and an outer multi-groove valve plate B is connected below the sealing valve plate; The bottom end of the liquid-passing shaft is connected with a pilot valve joint.

[0008] Preferably, the liquid-permeable cover is provided with inner flange parts inside, and the inner flange parts are in a plurality of groups, and the inner sides of the plurality of groups of inner flange parts are provided with cutouts.

[0009] Preferably, the valve plate A and the inner multi-grooved valve plate form a fault-proof disc, and a circular through hole is provided inside the valve plate A, and a cutout is provided inside the inner multi-grooved valve plate, and the cutout is shaped like a combination of a large middle circle and small circles on both sides.

[0010] Preferably, a special-shaped groove is provided inside the special-shaped spring sheet, and the special-shaped groove is in an irregular arc shape.

[0011] Preferably, the first valve plate A and the outer multi-grooved valve plate A are both provided with through holes, and the outer side of the through holes of the outer multi-grooved valve plate A is also provided with cutouts, and the number of the cutouts is four groups, which are equidistantly distributed on the outer side of the circular through holes.

[0012] Preferably, the first gasket and the second gasket have the same structure and are used in conjunction with the butterfly spring sheet.

[0013] Preferably, the first gasket, the second gasket, the butterfly spring sheet, the sealing valve sheet, the outer multi-groove valve sheet B and the pilot valve joint are all provided with through holes inside, and the through holes are penetrated by the lower half of the liquid-passing shaft.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: First, the present invention adds an oil groove in the special-shaped gasket, and the oil groove runs through the special-shaped gasket. Compared with the existing oil groove, the oil groove has a larger area, a faster oil passing speed, and more convenient liquid flow; Second, the overall size of the end cap is reduced by 1.5mm, further reducing the axial distance of the external valve; Third, the original two-petal design of the special-shaped spring leaf is changed to a three-petal design, which improves the stiffness of the spring leaf, improves the resilience, and reduces the probability of compression deformation; Fourthly, the present invention further reduces the axial dimension of the external valve by reducing the overall height of the reflux valve seat by 1.5 mm and cooperating with the end cap; Fifth, add disc springs and two special adjustment washers to obtain better shock absorber damping effect; Sixth, the shape of the sealing valve plate is changed to improve the rigidity and obtain better buffering effect. Two washers are used with the butterfly spring plate, and the added butterfly spring plate increases the damping force of the shock absorber. The sealing valve plate below is optimized to obtain better buffering effect. Seventh, the pilot valve connector combines the pilot valve and connector into one, reducing the axial size while meeting the performance requirements; BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the present invention; Figure 2 A comparative cross-sectional view of a conventional pilot valve of the present invention; Figure 3 It is a schematic diagram of the connection structure of the special-shaped gasket of the present invention; Figure 4 This is a schematic diagram of the connection structure of the return valve seat of the present invention; Figure 5 This is the installation diagram of the valve body of the present invention.

[0016] Among them: 1. Liquid-through cover; 2. Special-shaped gasket; 3. Gasket A; 4. Valve plate; 5. Valve plate A; 6. Inner multi-groove valve plate; 7. Gasket B; 8. End cap; 9. Special-shaped spring plate; 10. Reflux valve seat; 11. First valve plate A; 12. Outer multi-groove valve plate A; 13. Liquid-through shaft; 14. First gasket; 15. Second gasket; 16. Butterfly spring plate; 17. Sealing valve plate; 18. Outer multi-groove valve plate B; 19. Pilot valve connector. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-4 , a pilot valve comprises a liquid-passing cover 1, a special-shaped gasket 2 is connected to the bottom of the liquid-passing cover 1, and an oil-passing groove is arranged on the special-shaped gasket 2, the oil-passing groove is a cross structure, and the end of the cross groove is the end of the special-shaped gasket 2, and a gasket A3, a valve plate 4, a valve plate A5, an inner multi-groove valve plate 6, a gasket B7, and a special-shaped spring plate 9 are arranged in sequence below the special-shaped gasket 2, and an end cap 8 is arranged at the middle position of the gasket A3, the valve plate 4, the valve plate A5, the inner multi-groove valve plate 6, the gasket B7, and the special-shaped spring plate 9, and a return valve seat 10 is connected to the bottom of the end cap 8, and this structure constitutes a shock absorber safety mode; A liquid-passing shaft 13 is connected below the reflux valve seat 10, and a first valve plate A11 and an outer multi-groove valve plate A12 are arranged above the outer side of the liquid-passing shaft 13, a first gasket 14 and a second gasket 15 are arranged below the outer side of the liquid-passing shaft 13, and a butterfly spring plate 16 is arranged outside the first gasket 14 and the second gasket 15, a sealing valve plate 17 is installed outside the butterfly spring plate 16, and an outer multi-groove valve plate B18 is connected below the sealing valve plate 17; The bottom end of the liquid-passing shaft 13 is connected with a pilot valve joint 19 .

[0019] In this embodiment, the present application specifically highlights the addition of a through oil groove in the special-shaped gasket 2 and the addition of a butterfly spring sheet 16, thereby increasing the damping force of the shock absorber. In addition, the pilot valve connector 19 is optimized so that the connector and the pilot valve are combined into one.

[0020] Specifically, the liquid-permeable cover 1 is provided with inner flange parts, and the number of the inner flange parts is multiple groups, and the inner sides of the multiple groups of inner flange parts are provided with cutouts.

[0021] In this embodiment, the liquid-permeable cap 1 has a small diameter portion and a large diameter portion alternately formed on the cylindrical side wall along the circumferential direction, and a cutout extending radially from the inner peripheral edge portion to the peripheral edge portion of the large diameter portion is formed on the inner flange portion.

[0022] Specifically, the valve plate A5 and the inner multi-grooved valve plate 6 form a fault-proof disc, and a circular through hole is provided inside the valve plate A5, and a cutout is provided inside the inner multi-grooved valve plate 6, and the cutout is in the shape of a large circle in the middle combined with small circles on both sides.

[0023] In this embodiment, when the spring receiving portion of the pilot valve member contacts the fail-safe disk, the notches of the notched inner multi-grooved valve plate 6 form a passage that functions as a damping orifice.

[0024] Specifically, a special-shaped groove is arranged inside the special-shaped spring piece 9, and the special-shaped groove is in an irregular arc shape.

[0025] In this embodiment, the special-shaped spring piece 9 is designed to improve the rigidity, so that it can face a larger damping force without deformation, thereby extending the service life.

[0026] Specifically, through holes are provided inside the first valve plate A11 and the outer multi-grooved valve plate A12, and cutouts are provided outside the through holes of the outer multi-grooved valve plate A12. There are four groups of cutouts, which are equidistantly distributed outside the circular through holes.

[0027] In this embodiment, the shape of the outer multi-grooved valve plate A12 has an additional inner multi-grooved specification compared to the reference document.

[0028] Specifically, the first washer 14 and the second washer 15 have the same structure and are used in conjunction with the butterfly spring sheet 16 .

[0029] In this embodiment, the damping force of the pilot valve is increased after the butterfly spring sheet 16 is added. In order to cooperate with the butterfly spring sheet 16, the first gasket 14 and the second gasket 15 are added to play a better role in increasing the damping.

[0030] Specifically, the first gasket 14 , the second gasket 15 , the butterfly spring sheet 16 , the sealing valve sheet 17 , the outer multi-groove valve sheet B18 and the pilot valve joint 19 are all provided with through holes inside, and the through holes are penetrated by the lower half of the liquid-passing shaft 13 .

[0031] In this embodiment, the sealing valve plate 17 is optimized from the original circular structure to a structure with the middle circular ring side tilted upward, which provides better rigidity and better sealing effect.

[0032] In this embodiment, the valve body is integrally mounted on Figure 5 Structurally.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pilot valve, comprising a liquid-passing cover (1), characterized in that: A special-shaped gasket (2) is connected below the liquid-passing cover (1), and an oil-passing groove is provided on the special-shaped gasket (2), the oil-passing groove is a cross structure, and the end of the cross groove is the end of the special-shaped gasket (2), and a gasket A (3), a valve plate (4), a valve plate A (5), an inner multi-grooved valve plate (6), a gasket B (7), and a special-shaped spring plate (9) are arranged in sequence below the special-shaped gasket (2), and an end cap (8) is arranged at a middle position of the gasket A (3), the valve plate (4), the valve plate A (5), the inner multi-grooved valve plate (6), the gasket B (7), and the special-shaped spring plate (9), and a return valve seat (10) is connected below the end cap (8), and this structure constitutes a safety mode of the shock absorber; A liquid-passing shaft (13) is connected below the reflux valve seat (10), and a first valve plate A (11) and an outer multi-grooved valve plate A (12) are arranged above the outer side of the liquid-passing shaft (13); a first gasket (14) and a second gasket (15) are arranged below the outer side of the liquid-passing shaft (13), and a butterfly spring plate (16) is arranged outside the first gasket (14) and the second gasket (15); a sealing valve plate (17) is installed outside the butterfly spring plate (16), and an outer multi-grooved valve plate B (18) is connected below the sealing valve plate (17); The bottom end of the liquid-passing shaft (13) is connected to a pilot valve connector (19).

2. The pilot valve according to claim 1, characterized in that: The liquid-passing cover (1) is provided with an inner flange portion inside, and the inner flange portions are provided in a plurality of groups, and the inner sides of the plurality of groups of inner flange portions are provided with cutouts.

3. The pilot valve according to claim 1, characterized in that: The valve plate A (5) and the inner multi-grooved valve plate (6) form a fault-proof disc, and the valve plate A (5) is provided with a circular through hole inside, and the inner multi-grooved valve plate (6) is provided with a cutout inside, and the cutout is in the shape of a large circle in the middle combined with small circles on both sides.

4. The pilot valve according to claim 1, characterized in that: A special-shaped groove is arranged inside the special-shaped spring sheet (9), and the special-shaped groove is in an irregular arc shape.

5. The pilot valve according to claim 1, characterized in that: The first valve plate A (11) and the outer multi-grooved valve plate A (12) are both provided with through holes inside, and the outer side of the through hole of the outer multi-grooved valve plate A (12) is also provided with cutouts, the number of the cutouts being four groups, which are equidistantly distributed outside the circular through hole.

6. The pilot valve according to claim 1, characterized in that: The first gasket (14) and the second gasket (15) have the same structure and are used in conjunction with the butterfly spring sheet (16).

7. The pilot valve according to claim 1, characterized in that: The first gasket (14), the second gasket (15), the butterfly spring sheet (16), the sealing valve sheet (17), the outer multi-groove valve sheet B (18) and the pilot valve joint (19) are all provided with through holes in their interiors, and the through holes are penetrated by the lower half of the liquid-passing shaft (13).

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