Rigidity valve for vehicle suspension air spring system

Abstract

The invention relates to the technical field of variable-rigidity air springs for automobile suspensions, in particular to a rigidity valve for an air spring system of a vehicle suspension, which comprises a valve body. A coil is arranged in the valve body; an electromagnetic component is arranged in the coil; the electromagnetic assembly comprises static iron; the static iron is connected with a valve sleeve; the valve sleeve is connected with the valve body; a valve core is arranged in the valve sleeve; the valve core comprises an armature, a push rod and a valve body piston; the armature, the push rod and the valve body piston are of an integrated structure. According to the integrated valve element design of the rigidity valve, the armature, the push rod and the valve body piston are of an integrated structure, the problems that due to interference press fitting of several parts of a traditional rigidity valve, the machining precision of the parts is high, and the parts are coaxial after press fitting are effectively solved, the number of the parts is reduced, and the cost of the parts is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of variable-rigidity air springs for automobile suspensions, and in particular to a stiffness valve for a vehicle suspension air spring system. Background Art

[0002] The stiffness valve product includes a main valve part and an electromagnetic part. In the existing technology, the armature and the main valve piston in the main valve part are fastened together by interference fit or riveting with the push rod; interference fit or riveting requires high processing precision for the matching dimensions of the parts, and interference fit or riveting may lead to unreliable connections, and there is a risk of parts loosening and shifting during operation; the press-fitting or riveting of multiple parts has high control requirements for the axial length dimension, and requires high-precision equipment and stable process control, resulting in increased costs; after the three parts of the armature, main valve piston and push rod are fastened together, relatively high coaxiality requirements must be met. Poor coaxiality may easily cause movement jamming or increase friction, thereby causing abnormal valve function.

[0003] After searching, the applicant found that the Chinese patent document with application number 202210592484.8 disclosed an air spring piston and an air spring on July 15, 2022. The air spring piston includes a first mounting seat, a second mounting seat, a third mounting seat and a solenoid valve. The first mounting seat is connected to the vehicle body, and one side of the first mounting seat is integrally connected or welded to the second mounting seat, and is air-tightly connected to one end of the valve body of the solenoid valve through the second mounting seat; the other side of the first mounting seat is integrally connected or welded to the third mounting seat, and is air-tightly connected to the other end of the valve body of the solenoid valve through the third mounting seat; the three mounting seats and the valve body of the solenoid valve are surrounded to form a sub-chamber, and the sub-chamber is connected to the airbag of the air spring through the solenoid valve; this device also cannot solve the above technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to provide a stiffness valve for a vehicle suspension air spring system that can reduce the requirements for parts processing accuracy and assembly difficulty. Summary of the Invention

[0005] The object of the present invention is to provide a stiffness valve for a vehicle suspension air spring system, which can reduce the requirements for parts processing accuracy and assembly difficulty.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a stiffness valve for a vehicle suspension air spring system, comprising a valve body; a coil is provided in the valve body; an electromagnetic assembly is provided in the coil; the electromagnetic assembly includes a static iron; the static iron is connected to a valve sleeve; the valve sleeve is connected to the valve body; a valve core is provided in the valve sleeve; the valve core includes an armature, a push rod and a valve body piston; the armature, push rod and valve body piston are an integrated structure.

[0007] A mounting hole is provided in the valve body; the mounting hole is provided in the coil; the valve sleeve is sleeved on the static iron, and the valve sleeve is connected to the inner wall of the mounting hole; the armature is provided in the valve sleeve, and a reset spring is provided between the armature and the static iron.

[0008] The static iron is provided with a mounting protrusion near one end of the armature; a first spring groove is provided in the mounting protrusion; a mounting groove is provided on the armature; a second spring groove is provided in the mounting groove; the mounting protrusion is arranged in the mounting groove; one end of the return spring is connected to the first spring groove, and the other end of the return spring is connected to the second spring groove.

[0009] A sealing ring groove is provided on the outer wall of the armature; a sealing ring is provided in the sealing ring groove; the sealing ring includes a sealing protrusion; the cross section of the sealing protrusion is arc-shaped; the sealing protrusion abuts against the inner wall of the valve sleeve.

[0010] One end of the push rod is connected to the armature; the other end of the push rod is connected to the valve body piston; the valve body includes a second valve body; the second valve body is connected to a valve seat at one end away from the coil; the push rod and the valve body piston are both arranged in the second valve body.

[0011] The second valve body is provided with a first chamber and a second chamber; a main valve sealing ring is provided between the first chamber and the second chamber; a vent hole is provided on the main valve sealing ring; the vent hole is in communication with the first chamber and the second chamber;

[0012] The push rod is arranged in the vent hole; and the valve body piston is arranged on a side of the vent hole close to the valve seat.

[0013] A plurality of first air holes are provided on the side wall of the second valve body; the first air holes are communicated with the first chamber; a plurality of second air holes are provided on the valve seat; the second air holes are communicated with the second chamber.

[0014] A connecting groove is provided on the side of the valve body piston away from the push rod; a buffer block is provided in the connecting groove; a stop block is provided on the valve seat; and the buffer block abuts against the stop block.

[0015] The valve core is provided with a first pressure balancing hole; the block is provided with a second pressure balancing hole; one end of the first pressure balancing hole is communicated with the second spring groove, and the other end of the first pressure balancing hole is communicated with the second pressure balancing hole.

[0016] The beneficial effects of the present invention are:

[0017] When the present invention is applied to an air spring with adjustable stiffness, the coil is energized and de-energized by inputting a current signal, thereby completing the isolation and connection between the two chambers of the air spring; the present invention adopts an integrated valve core design of the stiffness valve: the armature, push rod and valve body piston are an integrated structure, which effectively reduces the problems of interference fit of several parts of the traditional stiffness valve on the high processing precision of parts and the coaxiality of parts after press-fitting, reduces the difficulty of assembly, reduces the number of parts, and saves the cost of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the valve opening state of the present invention.

[0020] Figure 2 It is a schematic diagram of the valve closed state of the present invention.

[0021] Figure 3 Schematic diagram of the structure of the valve seat of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the valve core of the present invention.

[0023] Figure 5 It is a structural schematic diagram of the second valve body of the present invention.

[0024] The marks in the above figure are:

[0025] The following are marked in the figure:

[0026] 1. Valve body, 101. Coil, 102. Mounting hole,

[0027] 2. Static iron, 201, valve sleeve,

[0028] 3. Valve core, 301, armature, 302, push rod, 303, valve body piston,

[0029] 4. Return spring, 401. Mounting protrusion, 402. First spring slot, 403. Mounting groove, 404. Second spring slot,

[0030] 5. Sealing ring groove, 501. Sealing ring, 502. Sealing bump,

[0031] 6. Second valve body, 601, valve seat,

[0032] 7. First chamber, 701, second chamber, 702, main valve sealing ring, 703, vent hole,

[0033] 8. First air hole, 801, second air hole,

[0034] 9. Connecting groove, 901. Buffer block, 902. Stop block, 903. First pressure balance hole, 904. Second pressure balance hole. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the specific implementation methods of the present invention through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0036] Figure 1-2 The stiffness valve shown for a vehicle suspension air spring system includes a valve body 1; a coil 101 is provided in the valve body 1; an electromagnetic assembly is provided in the coil 101; the electromagnetic assembly includes a static iron 2; the static iron 2 is connected to a valve sleeve 201; the valve sleeve 201 is connected to the valve body 1; a valve core 3 is provided in the valve sleeve 201; the valve core 3 includes an armature 301, a push rod 302 and a valve body piston 303; the armature 301, the push rod 302 and the valve body piston 303 are an integrated structure.

[0037] The rigidity valve has an integrated valve core 3 design: the armature 301, the push rod 302 and the valve body piston 303 are an integrated structure, which effectively reduces the problems of high part processing precision and coaxiality of parts after press-fitting caused by interference fit of several parts in traditional rigidity valves, reduces the number of parts, and saves component costs.

[0038] A mounting hole 102 is provided in the valve body 1; the mounting hole 102 is provided in the coil 101; the valve sleeve 201 is sleeved on the static iron 2, and the valve sleeve 201 is connected to the inner wall of the mounting hole 102; the armature 301 is provided in the valve sleeve 201, and a reset spring 4 is provided between the armature 301 and the static iron 2.

[0039] The coil 101 is installed in the valve body 1; the mounting hole 102 is coaxially arranged with the coil 101, and the mounting hole 102 is arranged inside the coil 101; the static iron 2 is a cylindrical structure; the valve sleeve 201 is sleeved on the static iron 2, and the valve sleeve 201 and the static iron 2 are welded; the valve sleeve 201 is sleeved in the mounting hole 102, and the outer wall of the valve sleeve 201 is welded to the inner wall of the mounting hole 102, thereby achieving a sealed connection between the valve sleeve 201 and the static iron 2, and the valve sleeve 201 and the valve body 1; the armature 301 is arranged in the valve sleeve 201 and can slide axially along the valve sleeve 201, and the valve sleeve 201 can limit and guide the armature 301;

[0040] When the coil 101 is energized, a magnetic field is generated. The mounting hole 102 is located inside the coil 101, so that the magnetic field can effectively act on the internal components. The armature 301 is driven by the magnetic field force inside the valve sleeve 201. When the coil 101 is energized, the magnetic field attracts the armature 301 to move toward the stationary iron 2, controlling the valve to close. After power is cut off, the return spring 4 releases its elastic potential energy, pushing the armature 301 to reset, causing the valve to resume opening, thereby achieving control of gas on and off.

[0041] like Figure 4 As shown, a mounting protrusion 401 is provided at one end of the stationary iron 2 near the armature 301; a first spring groove 402 is provided in the mounting protrusion 401; a mounting groove 403 is provided on the armature 301; a second spring groove 404 is provided in the mounting groove 403; the mounting protrusion 401 is arranged in the mounting groove 403; one end of the return spring 4 is connected to the first spring groove 402, and the other end of the return spring 4 is connected to the second spring groove 404.

[0042] The mounting protrusion 401 and the static iron 2 are an integrated structure; the mounting protrusion 401 on the static iron 2 cooperates with the mounting groove 403 of the armature 301 to achieve precise positioning of the two and ensure the stability of the magnetic field action path; the first spring groove 402 is arranged in the mounting protrusion 401, and the second spring groove 404 is arranged in the mounting groove 403 to provide a fixed anchor point for the reset spring 4; when the coil 101 is energized to generate a magnetic field to attract the armature 301 to move toward the static iron 2, the reset spring 4 is compressed and stores elastic potential energy; when the coil 101 is de-energized, the magnetic field disappears, and the reset spring 4 releases the elastic potential energy, and uses its two ends to be fixed in the first spring groove 402 and the second spring groove 404 to push the armature 301 back to the initial position along the predetermined path, thereby ensuring the stability of the movement of the armature 301 and the reliability of the reset during the valve control process.

[0043] A sealing ring groove 5 is provided on the outer wall of the armature 301 ; a sealing ring 501 is provided in the sealing ring groove 5 ; the sealing ring 501 includes a sealing protrusion 502 ; the cross section of the sealing protrusion 502 is arc-shaped; the sealing protrusion 502 abuts against the inner wall of the valve sleeve 201 .

[0044] The sealing ring 501 is a lip-shaped sealing ring; the sealing ring 501 is fixedly connected in the sealing ring groove 5, and the sealing protrusion 502 and the sealing ring 501 are an integral structure; the sealing ring groove 5 on the outer wall of the armature 301 is used to accommodate the sealing ring 501 and provide an installation space for the sealing ring 501; after the sealing ring 501 is fixedly connected in the sealing ring groove 5, the sealing protrusion 502 thereon is tightly abutted against the inner wall of the valve sleeve 201, and the elastic deformation characteristics of the arc structure are utilized to form a dynamic sealing interface between the armature 301 and the valve sleeve 201; when the armature 301 is displaced in the valve sleeve 201 by the magnetic field force or the action of the return spring 4, the sealing protrusion 502 is always in contact with the inner wall of the valve sleeve 201 through elastic extrusion, effectively preventing gas from leaking from the gap between the armature 301 and the valve sleeve 201, thereby ensuring the sealing and working stability inside the equipment.

[0045] One end of the push rod 302 is connected to the armature 301; the other end of the push rod 302 is connected to the valve body piston 303; the valve body 1 includes a second valve body 6; the end of the second valve body 6 away from the coil 101 is connected to the valve seat 601; the push rod 302 and the valve body piston 303 are both arranged in the second valve body 6.

[0046] The push rod 302, the armature 301 and the valve body piston 303 are integrally formed; the second valve body 6 and the valve body 1 are an integral structure; the valve seat 601 is fixedly connected to the second valve body 6;

[0047] When the coil 101 is energized to generate a magnetic field, the armature 301 is attracted by the magnetic field force and displaced. Since the push rod 302, the armature 301 and the valve body piston 303 are formed as one piece, the movement of the armature 301 will directly drive the push rod 302 and the valve body piston 303 to move synchronously; the push rod 302, as a force transmission component, transmits the magnetic field force on the armature 301 to the valve body piston 303, pushing the valve body piston 303 to move in the second valve body 6, changing its relative position with the valve seat 601, thereby controlling the flow of gas; when the coil 101 is de-energized, the magnetic field disappears, and under the action of the reset spring 4, the armature 301 drives the push rod 302 and the valve body piston 303 to return to their original position, and the valve body piston 303 is again pressed against the valve seat 601, restoring the initial valve open state.

[0048] like Figure 5 As shown, the second valve body 6 is provided with a first chamber 7 and a second chamber 701; a main valve sealing ring 702 is provided between the first chamber 7 and the second chamber 701; a vent hole 703 is provided on the main valve sealing ring 702; the vent hole 703 is communicated with the first chamber 7 and the second chamber 701;

[0049] The push rod 302 is arranged in the vent hole 703 ; the valve body piston 303 is arranged on the side of the vent hole 703 close to the valve seat 601 .

[0050] The first chamber 7 and the second chamber 701 in the second valve body 6 constitute the spatial basis for gas circulation, and the main valve sealing ring 702 separates the two chambers, and the air vent 703 thereon serves as a gas circulation channel; the diameter of the push rod 302 is smaller than the diameter of the air vent 703; when the coil 101 is not energized, the valve body piston 303 is pressed against the valve seat 601, so that the valve body piston 303 does not block the air vent 703, and the first chamber 7 and the second chamber 701 are connected through the air vent 703; when the coil 101 is energized, the valve body piston 303 is pressed against the main valve sealing ring 702, so that the valve body piston 303 blocks the air vent 703, and the air paths of the first chamber 7 and the second chamber 701 are disconnected.

[0051] like Figure 3 As shown, a plurality of first air holes 8 are provided on the side wall of the second valve body 6 ; the first air holes 8 are communicated with the first chamber 7 ; a plurality of second air holes 801 are provided on the valve seat 601 ; the second air holes 801 are communicated with the second chamber 701 .

[0052] Air can enter and exit the stiffness valve from the first air hole 8 and the second air hole 801, ensuring the air flow in the power-off state and balancing the pressure in the first chamber 7 and the second chamber 701 of the air spring.

[0053] A connecting groove 9 is provided on the side of the valve body piston 303 away from the push rod 302 ; a buffer block 901 is provided in the connecting groove 9 ; a stopper 902 is provided on the valve seat 601 ; and the buffer block 901 abuts against the stopper 902 .

[0054] The buffer block 901 is made of non-metallic material; the buffer block 901 is fixedly connected in the connecting groove 9; the stopper 902 and the valve seat 601 are an integrated structure, which can effectively reduce the impact between the valve body piston 303 and the valve seat 601 and reduce noise.

[0055] The valve core 3 is provided with a first pressure balance hole 903 ; the stopper 902 is provided with a second pressure balance hole 904 ; one end of the first pressure balance hole 903 is communicated with the second spring groove 404 , and the other end of the first pressure balance hole 903 is communicated with the second pressure balance hole 904 .

[0056] The second spring groove 404, the first pressure balance hole 903 and the second pressure balance hole 904 are connected to maintain the pressure balance between the electromagnetic assembly and the valve body 1; the second spring groove 404 serves as the installation space for the reset spring 4, and there is a pressure change during the compression and reset process of the reset spring 4; the first pressure balance hole 903 passes through the valve core 3, one end is connected to the second spring groove 404, and the other end is connected to the second pressure balance hole 904 on the stop block 902. The three constitute a gas conduction channel, ensuring that the valve core 3 can operate in a stable pressure environment, maintain the reliability and stability of operation, and at the same time reduce the risk of damage to the seal caused by pressure shock.

[0057] A method for assembling a stiffness valve for a vehicle suspension air spring system comprises the following steps:

[0058] S1: Connect the return spring 4 between the valve core 3 and the stationary iron 2; install the sealing ring 501 in the sealing ring groove 5 of the valve core 3; weld the valve sleeve 201 on the stationary iron 2; and install the valve core 3 in the valve sleeve 201;

[0059] S2: Weld the valve sleeve 201 into the mounting hole 102;

[0060] S3: Install the main valve sealing ring 702 between the first chamber 7 and the second chamber 701 ; and place the push rod 302 in the vent hole 703 .

[0061] The specific workflow of the present invention is as follows:

[0062] When power is turned on, the valve core 3 is acted upon by the electromagnetic force, overcomes the spring force of the return spring 4, and the friction between the sealing ring 501 and the valve sleeve 201, and moves upward until the deformation force of the valve body piston 303 is equal to that of the main valve sealing ring 702, and stops moving, thereby separating the first chamber 7 and the second chamber 701 and completing the sealing; when power is turned off, the valve core 3 moves downward under the action of the spring force of the return spring 4, and the buffer block 901 located on the valve body piston 303 contacts the valve seat 601. The buffer member 901 is made of non-metallic material, which can effectively reduce the impact between the valve core 3 and the valve seat 601 and reduce noise; at this time, the valve port is open, and the first air hole 8 and the second air hole 801 are connected to each other.

[0063] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any direct application of the above-described concepts and technical solutions to other situations without modification, fall within the scope of protection of the present invention.

Claims

1. A stiffness valve for a vehicle suspension air spring system, characterized in that: The invention comprises a valve body (1); a coil (101) is provided in the valve body (1); an electromagnetic assembly is provided in the coil (101); the electromagnetic assembly comprises a static iron (2); the static iron (2) is connected to a valve sleeve (201); the valve sleeve (201) is connected to the valve body (1); a valve core (3) is provided in the valve sleeve (201); the valve core (3) comprises an armature (301), a push rod (302) and a valve body piston (303); the armature (301), the push rod (302) and the valve body piston (303) are an integrated structure.

2. A stiffness valve for a vehicle suspension air spring system according to claim 1, characterized in that: A mounting hole (102) is provided in the valve body (1); the mounting hole (102) is provided in the coil (101); the valve sleeve (201) is sleeved on the static iron (2), and the valve sleeve (201) is connected to the inner wall of the mounting hole (102); the armature (301) is provided in the valve sleeve (201), and a return spring (4) is provided between the armature (301) and the static iron (2).

3. A stiffness valve for a vehicle suspension air spring system according to claim 2, characterized in that: The static iron (2) is provided with a mounting protrusion (401) near one end of the armature (301); a first spring groove (402) is provided in the mounting protrusion (401); a mounting groove (403) is provided on the armature (301); a second spring groove (404) is provided in the mounting groove (403); the mounting protrusion (401) is arranged in the mounting groove (403); one end of the return spring (4) is connected to the first spring groove (402), and the other end of the return spring (4) is connected to the second spring groove (404).

4. A stiffness valve for a vehicle suspension air spring system according to claim 3, characterized in that: A sealing ring groove (5) is provided on the outer wall of the armature (301); a sealing ring (501) is provided in the sealing ring groove (5); the sealing ring (501) includes a sealing protrusion (502); the cross section of the sealing protrusion (502) is arc-shaped; the sealing protrusion (502) abuts against the inner wall of the valve sleeve (201).

5. A stiffness valve for a vehicle suspension air spring system according to any one of claims 3 to 4, characterized in that: One end of the push rod (302) is connected to the armature (301); the other end of the push rod (302) is connected to the valve body piston (303); the valve body (1) includes a second valve body (6); the second valve body (6) is connected to a valve seat (601) at one end away from the coil (101); the push rod (302) and the valve body piston (303) are both arranged in the second valve body (6).

6. A stiffness valve for a vehicle suspension air spring system according to claim 5, characterized in that: The second valve body (6) is provided with a first chamber (7) and a second chamber (701); a main valve sealing ring (702) is provided between the first chamber (7) and the second chamber (701); a vent hole (703) is provided on the main valve sealing ring (702); the vent hole (703) is in communication with the first chamber (7) and the second chamber (701); The push rod (302) is arranged in the vent hole (703); and the valve body piston (303) is arranged on a side of the vent hole (703) close to the valve seat (601).

7. A stiffness valve for a vehicle suspension air spring system according to claim 6, characterized in that: A plurality of first air holes (8) are provided on the side wall of the second valve body (6); the first air holes (8) are communicated with the first chamber (7); a plurality of second air holes (801) are provided on the valve seat (601); the second air holes (801) are communicated with the second chamber (701).

8. A stiffness valve for a vehicle suspension air spring system according to any one of claims 6 to 7, characterized in that: A connecting groove (9) is provided on the side of the valve body piston (303) away from the push rod (302); a buffer block (901) is provided in the connecting groove (9); a stop block (902) is provided on the valve seat (601); and the buffer block (901) abuts against the stop block (902).

9. A stiffness valve for a vehicle suspension air spring system according to claim 8, characterized in that: The valve core (3) is provided with a first pressure balancing hole (903); the stopper (902) is provided with a second pressure balancing hole (904); one end of the first pressure balancing hole (903) is communicated with the second spring groove (404), and the other end of the first pressure balancing hole (903) is communicated with the second pressure balancing hole (904).

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