Built-in inverse proportional electromagnetic valve for shock absorber

Abstract

The utility model discloses a built-in inverse proportion solenoid valve for a shock absorber, and relates to the field of solenoid valves, the built-in inverse proportion solenoid valve comprises a hydraulic structure and an electromagnetic mechanism which are assembled together, the hydraulic structure comprises an end cover, a movable valve seat, a valve core, a valve core rod, a valve core rod spring and an outer shell, and two ends of the outer shell are respectively assembled with the end cover and the electromagnetic mechanism. The valve element is assembled in the outer shell in a clearance mode, the movable valve seat is assembled at the end, close to the end cover, of the valve element in a clearance mode, the valve element rod is arranged in the outer shell in a sliding mode and located between the valve element and the electromagnetic mechanism, the valve element rod spring is assembled on the valve element rod, a fluid flow channel is formed in the valve element, and one end of the fluid flow channel is located on a moving path of the valve element rod. The valve element rod adjusts the gap between the valve element rod and the fluid flow channel by moving the valve element rod, and adjusts the size of the gap between the valve element and the end cover by moving the valve element, so that the sectional area where fluid flows through is changed, control over the linear proportion of the flow and the pressure is achieved, and accurate adjustment and control can be conducted at low current.

Description

TECHNICAL FIELD

[0001] The utility model relates to solenoid valve field, concretely is a built -in type inverse proportional solenoid valve for shock absorber. BACKGROUND

[0002] Automobile suspension system is related to the important part of automobile safety, shock absorber makes the important component of suspension system, can be used for reducing spring rebound and the impact of road surface, can improve the driving smoothness and comfort of car. The solenoid valve is contained in the shock absorber, most solenoid valves on the market are divided into built-in type and external type, the main problem of the built-in solenoid valve at present is that the product cannot be accurately controlled at low current. SUMMARY

[0003] The utility model discloses a built-in type inverse proportional solenoid valve for shock absorber, which is used to solve the problem of the prior art.

[0004] The utility model discloses a built-in type inverse proportional solenoid valve for shock absorber, which is used to solve the problem of the prior art.

[0005] Further, the fluid flow channel includes a first flow channel, a second flow channel, a first feedback cavity, a third flow channel and a second feedback cavity, the first feedback cavity and the second feedback cavity are respectively arranged at two ends of the valve core, the first flow channel is communicated with the first feedback cavity and the second feedback cavity respectively, one end of the second flow channel is communicated with the first feedback cavity, and the other end is communicated with the third flow channel, the third flow channel is arranged on the side wall of the valve core, the first feedback cavity is arranged close to the valve core rod, and the second flow channel is located on the moving path of the valve core rod.

[0006] Further, a first flow channel is formed through the center of the end cover, a plurality of second flow channels and third flow channels are formed around the first flow channel of the end cover, the second flow channels are coaxially communicated with the third flow channels, the first flow channel of the movable valve seat is communicated with the first flow channel of the end cover, the first feedback cavity of the movable valve seat is communicated with the second feedback cavity, the first flow channel of the outer shell is communicated with the third flow channel of the end cover, and the tapered surface of the valve core near the end of the end cover forms a sealing surface in the third flow channel of the end cover.

[0007] Further, the electromagnetic mechanism comprises a coil assembly, a magnetic core assembly, a magnetic shielding ring, a rear shell and a magnetic conducting seat, the magnetic shielding ring, the rear shell and the outer shell are assembled into one whole, the magnetic core assembly is gap assembled in the outer shell, the coil assembly is gap assembled on the outer circle of the outer shell, and the magnetic conducting seat is assembled with the rear shell through a split pin.

[0008] Further, the magnetic core assembly comprises a magnetic core end cover, a valve core rod support, a magnetic core spring, a magnetic core shell and an adjusting spring seat, the magnetic core shell is gap assembled in the outer shell, the magnetic core end cover is assembled between the valve core and the magnetic core shell, the valve core rod support and the adjusting spring seat are sequentially assembled in the magnetic core shell away from the valve core, the magnetic core spring is arranged between the valve core rod support and the adjusting spring seat, the valve core rod support is provided with a valve core groove near one end of the valve core rod, and the valve core rod is assembled in the valve core groove away from the movable valve seat.

[0009] Further, the magnetic core end cover and the magnetic core shell are assembled with a pattern gasket, the side wall step of the valve core rod support and the inner wall step of the magnetic core shell are assembled with a support gasket ring, a pattern gasket ring and a cross gasket, and the inner wall of the magnetic core shell away from one end of the magnetic core end cover is assembled with a magnetic shielding gasket.

[0010] Further, the outer wall of the end cover and the inner wall of the outer shell are gap assembled with an end cover adjusting gasket, and the outer wall of the valve core rod and the inner wall of the valve core rod support are gap assembled with a valve core rod spring gasket.

[0011] Further, the adjusting screw is assembled on the rear shell, the adjusting screw is movably penetrated into the adjusting spring seat, and the adjusting screw and the rear shell are assembled with an adjusting screw sealing ring.

[0012] Further, the rear shell and the outer shell are assembled with a rear shell sealing ring, and the end face of the rear shell away from the outer shell is assembled with an outer sealing ring and an inner sealing ring.

[0013] Further, the outer shell is equipped with an external sealing ring.

[0014] The utility model discloses the beneficial effect is:

[0015] The size of the gap between the valve core and the end cover is adjusted by the movement of the valve core, the cross-sectional area of the fluid flow is changed, thereby realizing the linear proportional control of the flow and the pressure, and precise regulation and control can be carried out at low current. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is internal structure schematic diagram of the built-in inverse proportional electromagnetic valve for shock absorber of the utility model;

[0017] Figure 2 It is structure schematic diagram of the magnetic core assembly in the built-in inverse proportional electromagnetic valve for shock absorber of the utility model;

[0018] Figure 3 It is structure schematic diagram of the valve core in the built-in inverse proportional electromagnetic valve for shock absorber of the utility model;

[0019] Figure 4 It is arrangement schematic diagram of the flow channel in the built-in inverse proportional electromagnetic valve for shock absorber of the utility model;

[0020] Figure 5 It is Figure 1 The enlarged view of A in the middle;

[0021] In the drawing, 1-end cover, 2-end cover adjusting gasket, 3-outer shell, 4-valve core rod, 5-external sealing ring, 6-magnetic core end cover, 7-flower gasket, 8-valve core rod support, 9-magnetic core spring, 10-magnetic core shell, 11-magnetic ring, 12-coil assembly, 13-rear shell, 14-split pin, 15-magnetic seat, 16-movable valve seat, 17-valve core, 18-valve core rod spring, 19-valve core rod spring gasket, 20-support gasket ring, 21-flower gasket gasket ring, 22-cross gasket, 23-adjusting spring seat, 24-adjusting bolt, 25-magnetic gasket ring, 26-adjusting bolt sealing ring, 27-rear shell sealing ring, 28-outer sealing ring, 29-inner sealing ring, 40-magnetic core assembly, 41-first flow channel, 42-second flow channel, 43-first feedback cavity, 44-third flow channel, 45-second feedback cavity, 46-end cover third flow channel, 47-end cover second flow channel, 48-end cover first flow channel, 49-valve seat first flow channel, 50-valve seat first feedback cavity, 51-outer shell first flow channel, 52-outer shell second flow channel. DETAILED DESCRIPTION

[0022] Example one

[0023] As Figures 1 to 5As shown, a built-in inverse proportional electromagnetic valve for shock absorber includes hydraulic structure and electromagnetic mechanism assembled together, the hydraulic structure includes end cover 1, movable valve seat 16, valve core 17, valve core rod 4, valve core rod spring 18 and outer shell 3, the two ends of outer shell 3 are assembled with end cover 1 and electromagnetic mechanism respectively, the outer circle of outer shell 3 is assembled with external sealing ring 5, valve core 17 is gap assembled in outer shell 3, the end of valve core 17 close to end cover 1 is gap assembled with movable valve seat 16, valve core rod 4 is slidingly arranged in outer shell 3, valve core rod 4 is between valve core 17 and electromagnetic mechanism, valve core rod spring 18 is assembled on valve core rod 4, fluid flow channel is opened on valve core 17, one end of fluid flow channel is on the moving path of valve core rod 4, valve core rod 4 adjusts the gap between valve core rod 4 and fluid flow channel by moving, electromagnetic mechanism pushes valve core rod 4 to move left, makes valve core rod 4 move to fluid flow channel, adjusts the gap between valve core rod 4 and fluid flow channel; secondly, fluid enters into outer shell 3 through end cover 1, pushes valve core 17 to move right under hydraulic pressure, adjusts the gap between valve core 17 and end cover, makes the cross-sectional area of fluid flow change, so as to realize the linear proportional control of flow and pressure, can accurately control at low current.

[0024] Example two

[0025] On the basis of example one, as shown, Figures 1 to 5 fluid flow channel includes first flow channel 41, second flow channel 42, first feedback cavity 43, third flow channel 44 and second feedback cavity 45, first feedback cavity 43 and second feedback cavity 45 are respectively opened on the two ends of valve core 17, the two ends of first flow channel 41 are respectively communicated with first feedback cavity 43 and second feedback cavity 45, one end of second flow channel 42 is communicated with first feedback cavity 43, the other end is communicated with third flow channel 44, third flow channel 44 is opened on the side wall of valve core 17, first feedback cavity 43 is close to valve core rod 4, and second flow channel 42 is on the moving path of valve core rod 4, end cover first flow channel 48 is opened through the center of end cover 1, a plurality of end cover second flow channel 47 and end cover third flow channel 46 are uniformly opened around end cover first flow channel 48 of end cover 1, end cover second flow channel 47 is coaxially communicated with end cover third flow channel 46, valve seat first flow channel 49 and valve seat first feedback cavity 50 are sequentially arranged in the center of movable valve seat 16 along the direction close to valve core 17, wherein valve seat first flow channel 49 is communicated with end cover first flow channel 48, valve seat first feedback cavity 50 is communicated with second feedback cavity 45, outer shell first flow channel 51 and outer shell second flow channel 52 are opened on the side wall of outer shell 1, end cover third flow channel 46 is communicated with outer shell first flow channel 51, the taper surface of one end of valve core 17 close to end cover 1 is matched in end cover third flow channel 46 to form sealing surface, which is the initial position of valve core 17, when the product is powered and fluid passes, valve core 17 moves right, the taper surface of valve core 17 and the outer circle of end cover third flow channel 46 produce gap, by changing control current, fluid flow and pressure can be linearly controlled.

[0026] Example 3

[0027] Based on Example 2, such as Figures 1 to 5 As shown, the electromagnetic mechanism includes a coil assembly 12, a magnetic core assembly 40, a magnetic shielding ring 11, a rear housing 13, and a magnetic guide seat 15. The magnetic shielding ring 11, the rear housing 13, and the outer shell 3 are assembled as a whole. The magnetic core assembly 40 is loosely fitted inside the outer shell 3, and the coil assembly 12 is loosely fitted on the outer circumference of the outer shell 3. The magnetic guide seat 15 is assembled with the rear housing 13 via a cotter pin 14. The magnetic core assembly 40 includes a magnetic core end cap 6, a valve core rod support 8, a magnetic core spring 9, a magnetic core outer shell 10, and an adjusting spring seat 23. The magnetic core outer shell 10 is loosely fitted inside the outer shell 3. The magnetic core end cap 6 is fitted between the valve core 17 and the magnetic core outer shell 10. Inside the magnetic core outer shell 10, along the direction away from the valve core 17, the valve core rod support 8 and the adjusting spring seat 23 are sequentially assembled. The magnetic core spring 9 is disposed between the valve core rod support 8 and the adjusting spring seat 23. A valve core groove is provided at one end of seat 8 near valve core rod 4. The end of valve core rod 4 away from movable valve seat 16 is assembled in the valve core groove. After the coil assembly 12 is energized, a magnetic circuit is formed through the magnetically conductive outer shell 3, rear shell 13, magnetically conductive seat 15 and magnetic core assembly 40, which drives the magnetic core assembly 40 to move to the right against the elastic force of magnetic core spring 9. Fluid flows in from the end cover first flow channel 48 of end cover 1 and flows into the second feedback chamber 45 of valve core 17 through the valve seat first flow channel 49 of movable valve seat 16, thereby generating hydraulic pressure to push valve core 17 to move to the right, thereby separating valve core 17 from the sealing surface of end cover 1. Finally, the end cover third flow channel 46 is connected to the outer shell first flow channel 51 of outer shell 3. The stroke of magnetic core assembly 40 and valve core 17 is different under different currents, which realizes the different gaps generated between valve core 17 and end cover 1. The cross-sectional area through which the fluid flows changes, thereby achieving linear proportional control of flow rate and pressure. When the fluid flow direction is changed, that is, when it flows in from the first flow channel 51 of the outer shell, the magnetic core assembly 40 moves to the left, and the valve core 17 moves to the right under the hydraulic pressure, thereby separating the valve core 17 from the sealing surface of the end cover 1. Finally, the first flow channel 51 of the outer shell is connected to the third flow channel 46 of the end cover. When the magnetic core assembly 40 continues to move to the right, some fluid will enter the second feedback chamber 45 of the valve core 17. The movable valve seat 16 moves to the right under the hydraulic pressure, and the movable valve seat 16 separates from the sealing surface of the end cover 1, thereby allowing the fluid to flow out from the first flow channel 48 of the end cover, further increasing the cross-sectional area of ​​the fluid flow at this time.

[0028] Furthermore, a rear housing sealing ring 27 is installed between the rear housing 13 and the outer housing 3, and an outer sealing ring 28 and an inner sealing ring 29 are installed on the end face of the rear housing 13 away from the outer housing 3.

[0029] Further, the gap between the outer wall of the end cover 1 and the inner wall of the outer shell 1 is equipped with an end cover adjusting gasket 2, and the gap between the outer wall of the valve core rod 4 and the inner wall of the valve core rod support 8 is equipped with a valve core rod spring gasket 19, which is assembled by the gasket to make the assembly more stable.

[0030] Example Four

[0031] On the basis of Example Three, as shown in Figures 1 to 3 , the gap between the magnetic core end cover 6 and the magnetic core shell 10 is equipped with a pattern gasket 7, the gap between the side wall step of the valve core rod support 8 and the inner wall step of the magnetic core shell 10 is equipped with a support gasket ring 20, a pattern gasket ring 21 and a cross gasket 22, and the inner wall of the end of the magnetic core shell 10 away from the magnetic core end cover 6 is equipped with a magnetic shielding gasket ring 25, which makes the assembly of the magnetic core end cover 6 and the valve core rod support 8 more stable.

[0032] Example Five

[0033] On the basis of Example Four, as shown in Figure 1 and Figure 2 , the rear shell 13 is equipped with an adjusting bolt 24, the adjusting bolt 24 is movably inserted into the adjusting spring seat 23, and the adjusting bolt 24 is equipped with an adjusting bolt sealing ring 26 between the adjusting bolt 24 and the rear shell 13, which guides the assembly of the magnetic core assembly 40 in the outer shell 3, and realizes the stable movement of the magnetic core assembly 40 under the electromagnetic force.

Claims

1. An inbuilt inverse proportional solenoid valve for a shock absorber, comprising a hydraulic structure and an electromagnetic mechanism assembled together, characterized in that, The hydraulic structure comprises an end cover (1), a movable valve seat (16), a valve core (17), a valve core rod (4), a valve core rod spring (18) and an outer shell (3), two ends of the outer shell (3) are respectively assembled with the end cover (1) and an electromagnetic mechanism, the valve core (17) is gap assembled in the outer shell (3), one end of the valve core (17) close to the end cover (1) is gap assembled with the movable valve seat (16), the valve core rod (4) is slidingly arranged in the outer shell (3), the valve core rod (4) is located between the valve core (17) and the electromagnetic mechanism, the valve core rod spring (18) is assembled on the valve core rod (4), the valve core (17) is provided with a fluid flow channel, one end of the fluid flow channel is located on the moving path of the valve core rod (4), and the valve core rod (4) adjusts the gap between the valve core rod (4) and the fluid flow channel by moving.

2. The built-in inverse proportional solenoid valve for a shock absorber according to claim 1, characterized by The fluid flow channel comprises a first flow channel (41), a second flow channel (42), a first feedback cavity (43), a third flow channel (44) and a second feedback cavity (45), the first feedback cavity (43) and the second feedback cavity (45) are respectively arranged at two ends of the valve core (17), two ends of the first flow channel (41) are respectively communicated with the first feedback cavity (43) and the second feedback cavity (45), one end of the second flow channel (42) is communicated with the first feedback cavity (43), the other end is communicated with the third flow channel (44), the third flow channel (44) is arranged on the side wall of the valve core (17), the first feedback cavity (43) is arranged close to the valve core rod (4), and the second flow channel (42) is located on the moving path of the valve core rod (4).

3. The built-in inverse proportional solenoid valve for a shock absorber according to claim 2, characterized in that, A first end cover flow channel (48) is arranged at the center of the end cover (1), a plurality of second end cover flow channels (47) and third end cover flow channels (46) are uniformly arranged around the first end cover flow channel (48), the second end cover flow channel (47) is coaxially communicated with the third end cover flow channel (46), a first valve seat flow channel (49) and a first valve seat feedback cavity (50) are sequentially arranged at the center of the movable valve seat (16) in the direction close to the valve core (17), wherein the first valve seat flow channel (49) is communicated with the first end cover flow channel (48), the first valve seat feedback cavity (50) is communicated with the second feedback cavity (45), a first outer shell flow channel (51) and a second outer shell flow channel (52) are arranged on the side wall of the outer shell (3), the third end cover flow channel (46) is communicated with the first outer shell flow channel (51), and the tapered surface of one end of the valve core (17) close to the end cover (1) is matched in the third end cover flow channel (46) to form a sealing surface.

4. The built-in inverse proportional solenoid valve for a shock absorber according to claim 1, characterized in that, The electromagnetic mechanism comprises a coil assembly (12), a magnetic core assembly (40), a magnetic isolation ring (11), a rear shell (13) and a magnetic conducting base (15), the magnetic isolation ring (11), the rear shell (13) and the outer shell (3) are assembled into an integral whole, the magnetic core assembly (40) is gap assembled in the outer shell (3), the coil assembly (12) is gap assembled on the outer circle of the outer shell (3), and the magnetic conducting base (15) is assembled with the rear shell (13) through a split pin (14).

5. The built-in inverse proportional solenoid valve for a shock absorber according to claim 4, characterized in that, The magnetic core assembly (40) comprises a magnetic core end cover (6), a valve core rod support (8), a magnetic core spring (9), a magnetic core shell (10) and an adjusting spring seat (23), the magnetic core shell (10) is gap assembled in the outer shell (3), the magnetic core end cover (6) is assembled between the valve core (17) and the magnetic core shell (10), the magnetic core shell (10) is sequentially assembled with the valve core rod support (8) and the adjusting spring seat (23) in the direction away from the valve core (17), the magnetic core spring (9) is arranged between the valve core rod support (8) and the adjusting spring seat (23), and the valve core rod support (8) is provided with a valve core groove at one end close to the valve core rod (4), and the valve core rod (4) is assembled in the valve core groove at an end away from the movable valve seat (16).

6. The built-in inverse proportional solenoid valve for a shock absorber according to claim 5, characterized in that, A pattern gasket (7) is assembled between the magnetic core end cover (6) and the magnetic core shell (10), a support gasket ring (20), a pattern gasket gasket ring (21) and a cross gasket (22) are assembled between the side wall step of the valve core rod support (8) and the inner wall step of the magnetic core shell (10), and a magnetic isolation gasket ring (25) is assembled on the inner wall of one end of the magnetic core shell (10) away from the magnetic core end cover (6).

7. The built-in inverse proportional solenoid valve for a shock absorber according to claim 5, wherein A gap is assembled between the outer wall of the end cover (1) and the inner wall of the outer shell (3), and an end cover adjusting gasket (2) is assembled therebetween.

8. The built-in inverse proportional solenoid valve for a shock absorber according to claim 5, wherein An adjusting bolt (24) is assembled on the rear shell (13), the adjusting bolt (24) is movably inserted into the adjusting spring seat (23), and an adjusting bolt sealing ring (26) is assembled between the adjusting bolt (24) and the rear shell (13).

9. The built-in inverse proportional solenoid valve for a shock absorber according to claim 5, wherein A rear shell sealing ring (27) is assembled between the rear shell (13) and the outer shell (3), an outer sealing ring (28) and an inner sealing ring (29) are assembled on the end face of the rear shell (13) away from the outer shell (3).

10. The built-in inverse proportional solenoid valve for a shock absorber according to claim 1, wherein An external sealing ring (5) is assembled on the outer circle of the outer shell (3).

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