Two-channel electromagnetic control valve

Abstract

The double-channel electromagnetic control valve comprises an electromagnet and a controller arranged on one side of the electromagnet, the controller at least comprises a barrel extending in the axial direction of the electromagnet, a hole A and a hole B are formed in the outer circumferential face of the barrel in a front-back split mode, a hole P is formed in the free end side of the barrel, and a hole B is formed in the outer circumferential face of the barrel. A steel ball capable of selectively sealing the P hole is arranged in an inner cavity of the free end of the cylinder body; a containing cavity is formed in the cylinder body, a push rod driven by the electromagnet is arranged in the containing cavity, the diameter of the end side of the push rod is smaller than that of the hole P, and at least part of the push rod can extend out of the hole P; the push rod is sleeved with a sealing plug capable of selectively separating a communication channel between the hole A and the hole B. The device has the advantages that under the condition that the coil is not powered on or powered off, the steel ball is completely attached to the P hole all the time under the action of hydraulic oil, the situation that the hydraulic oil leaks can be avoided, and safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic control valves, and in particular to a dual-channel electromagnetic control valve. Background Art

[0002] In automotive control systems, solenoid control valves are often used to control oil under pressure, for example, the oil under pressure can be used to switch the detent pin in the switching lifter and the lash adjuster in the engine valve system. The valve lift mechanism is the engine component that controls the opening and closing of the exhaust valve and the intake valve in the engine. The lash adjuster can also be used to disable the exhaust valve and the intake valve in the engine. The engine valves can be selectively disabled (failed) or locked to stop the operation of some cylinders when the power demand on the engine is reduced. By disabling the cylinders, the fuel efficiency of the engine can be improved.

[0003] For example, authorization announcement number CN106246901B discloses an automatic transmission gear position control switch solenoid valve, including a matching valve body, a valve core and an electromagnet assembly, the valve body is provided with a P port and an A port, the valve core is assembled in the valve body, the P port is communicated with the A port through the inner cavity of the valve core, a valve core cover is arranged in the valve core, a steel ball is arranged between the valve core cover and the valve core, the steel ball cooperates with the oil inlet of the valve core to control the on-off between the P port and the A port; the electromagnet assembly includes a coil assembly, a static iron core and a moving iron core in the center of the coil assembly, and a spring between the static iron core and the moving iron core, a push rod is arranged in the center of the moving iron core, the push rod passes through the valve core cover and cooperates with the steel ball. When the coil assembly of the electromagnet assembly is not energized, the elastic force of the spring pushes the moving iron core to the left, and then the push rod in the center of the moving iron core pushes the steel ball to the left, so that the steel ball and the oil inlet of the valve core form a seal, thereby isolating the P port and the A port, and the solenoid valve is in a closed state at this time; when the coil assembly of the electromagnet assembly is energized, the coil assembly generates electromagnetic force, so that the moving iron core overcomes the elastic force of the spring and moves to the right, and the rightward movement of the moving iron core drives the push rod to move right, so that the push rod is separated from the steel ball; after losing the force of the push rod, the steel ball is flushed open by the oil pressure of the P port, and then separated from the oil inlet, the seal is broken, and the P port and the A port are connected, and the solenoid valve is in an open state at this time; when the power is off, the moving iron core loses the effect of the electromagnetic force, and moves left again under the action of the elastic force of the spring, and finally the steel ball and the oil inlet of the valve core form a seal again, and the solenoid valve is closed; and the remaining oil pressure in the valve core is discharged from the T port.

[0004] During the entire control process of this technology, no matter whether the coil assembly is not powered or loses power, its spring needs to always exert force on the steel ball, especially after the coil assembly of the electromagnet assembly is powered, the moving iron core needs to overcome the elastic force of the spring to move to the right. The spring will fatigue after long-term use, resulting in poor elastic force, and leakage is prone to occur between the steel ball and the oil inlet of the valve core, posing a major safety hazard. Furthermore, when hydraulic oil enters the moving iron core, it will also damp the movement of the spring.

[0005] In addition, in this technology, not only is the assembly structure of the valve core cover difficult, but when the coil assembly is energized, the hydraulic oil will exert force on the valve core cover through the steel ball. The valve core cover is easily bent and deformed under the action of external force, affecting safety and service life, and has great limitations. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a dual-channel electromagnetic control valve.

[0007] The purpose of the present invention is achieved through the following technical solutions: A dual-channel electromagnetic control valve, comprising an electromagnet and a controller arranged on one side thereof, wherein the controller at least comprises a cylinder extending along the axial direction of the electromagnet, wherein an A hole and a B hole arranged front and rear are provided on the outer circumferential surface of the cylinder, wherein a P hole is provided on the free end side of the cylinder, wherein a steel ball which can selectively seal the P hole is provided in the inner cavity of the free end of the cylinder; wherein an accommodating cavity is provided in the cylinder, wherein a push rod driven by the electromagnet is arranged in the accommodating cavity, wherein the diameter of the end side of the push rod is smaller than the diameter of the P hole, and the push rod can at least partially extend outside the P hole; wherein a sealing plug which can selectively isolate the communication channel between the A hole and the B hole is sleeved on the push rod; When the electromagnet is energized, the electromagnet drives the push rod to move forward, and the sealing plug completely blocks the communication channel between hole A and hole B; at the same time, the free end of the push rod extending outside the hole P pushes the steel ball open, and the hole A is connected with the hole P, forming a first circuit; When the electromagnet loses power, the electromagnet drives the push rod to move backward, and the steel ball is only subjected to the force exerted by the hydraulic oil and is tightly attached to one side of the P hole and seals it; at the same time, a connecting channel connecting the A hole and the B hole is formed between the outer circumferential surface of the sealing plug and the inner wall of the cylinder, forming a second circuit.

[0008] Preferably, the accommodating cavity includes a large diameter end and a small diameter end, the A hole is opened on the small diameter end, the B hole is opened on the large diameter end, and the sealing plug is made of elastic material, and its diameter is between the diameters of the large diameter end and the small diameter end.

[0009] Preferably, the push rod includes an integrally formed large diameter portion and a small diameter portion, and a groove is provided on the end side of the large diameter portion close to the small diameter portion; the sealing plug includes at least an integrally formed frustum end and a hook end, the hook end is clamped in the groove, and the frustum end is sleeved on the small diameter portion, and its end face is arc-shaped.

[0010] Preferably, a retaining frame is fixedly provided on the end side of the cylinder, the steel ball is movably arranged in the retaining frame, and the end surface of the P hole is provided with an arc groove matched with the outer contour of the steel ball.

[0011] Preferably, a sealing groove is provided on the outer circumferential surface of the cylinder, and a sealing ring matching the sealing groove is provided in the sealing groove, and the sealing ring is located on both sides of the A hole.

[0012] Preferably, the electromagnet at least includes an outer shell fixedly mounted on the cylinder, a coil box is fixedly mounted on the inner wall of the outer shell, a coil is built in the coil box, a fixed iron core is also fixedly mounted on the cylinder, a moving iron core movable relative to the fixed iron core is provided on one side of the fixed iron core, the push rod is fixedly mounted on the moving iron core, and the push rod extends through the fixed iron core and is placed outside the fixed iron core.

[0013] Preferably, the shell has a built-in bushing, one end of the bushing is seamlessly connected to the cover plate, and the other end is seamlessly connected to the flange, a receiving cavity is provided in the bushing, and the fixed iron core and the moving iron core are arranged in the receiving cavity.

[0014] Preferably, the housing is composed of a shell and flanges and a cover plate arranged at both ends thereof, the flange, the cover plate and the shell form a loop, and all three are made of iron.

[0015] Preferably, the fixed iron core and the movable iron core are further provided with an oil drainage path, and the oil drainage path is communicated with the accommodating cavity.

[0016] The beneficial effects of the present invention are mainly reflected in: 1. When the coil is not energized or loses power, the steel ball is always completely in close contact with the P hole only under the action of hydraulic oil, which can avoid the leakage of hydraulic oil and improve safety.

[0017] 2. Compared with the prior art, the spring, valve core cover and other structures are eliminated, so there is no aging or deformation, which not only improves safety, but also optimizes the overall structure, improves the convenience of assembly, reduces costs, and has a wide range of applicability.

[0018] 3. When the sealing plug is separating the large diameter end and the small diameter end, it will deform, making the sealing effect stronger. Moreover, one end face of the sealing plug is an arc surface, which can ensure that its deformation is the overall deformation of the entire end face, avoiding wrinkles and the like, and further ensuring the sealing effect.

[0019] 4. The sealing rings are located on both sides of the oil control port. The setting of the sealing rings can play a sealing role to avoid leakage of hydraulic oil and improve cleanliness.

[0020] 5. The flange, cover plate and shell cooperate with each other to form a magnetic conductive part, which can concentrate the magnetic field force and make the magnetic field distribution more dense, thereby maximizing the attraction force, ensuring the attraction force between the moving iron core and the fixed iron core, and improving stability.

[0021] 6. The setting of the bushing and the oil discharge path can not only prevent the hydraulic oil from flowing into the coil box, thus improving safety, but also lubricate the moving iron core, reduce the friction generated during the movement of the moving iron core, extend the service life, and also play a role in reducing noise.

[0022] 7. This control valve adopts dual-circuit control. Compared with the single-circuit control in the existing technology, it has stable and reliable operation, good sealing effect and wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings: Figure 1 : A cross-sectional view of a preferred embodiment of the present invention; Figure 2 : Figure 1 A magnified view of part A; Figure 3 : A three-dimensional diagram of the fixed iron core and the moving iron core in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0027] like Figures 1 to 3 As shown, the present invention discloses a dual-channel electromagnetic control valve, including an electromagnet and a controller arranged on one side thereof, wherein the controller at least includes a barrel 1 extending along the axial direction of the electromagnet, an outer circumferential surface of the barrel 1 is provided with an A hole 2 and a B hole 3 which are arranged front and back, a free end side of the barrel 1 is provided with a P hole 4, and a steel ball 5 which can selectively seal the P hole 4 is arranged in the inner cavity of the free end of the barrel 1; an accommodating chamber 11 is arranged in the barrel 1, and a push rod 6 driven by the electromagnet is arranged in the accommodating chamber 11, the diameter of the end side of the push rod 6 is smaller than the diameter of the P hole 4, and can at least partially extend to be placed outside the P hole 4; a sealing plug 7 which can selectively isolate the communication channel between the A hole 2 and the B hole 3 is sleeved on the push rod 6.

[0028] In the above, when the electromagnet is energized, the electromagnet drives the push rod 6 to move forward, and the sealing plug 7 completely isolates the connecting passage between the A hole 2 and the B hole 3; at the same time, the free end portion of the push rod 6 extending outside the P hole 4 pushes the steel ball 5 open, and the A hole 2 is connected with the P hole 4 to form a first circuit.

[0029] When the electromagnet loses power, the electromagnet drives the push rod 6 to move backward, and the steel ball 5 is only subjected to the force exerted by the hydraulic oil and is tightly attached to one side of the P hole 4 and seals it; at the same time, a connecting channel connecting the A hole 2 and the B hole 3 is formed between the outer circumferential surface of the sealing plug 7 and the inner wall of the cylinder 1, forming a second circuit.

[0030] Compared with the prior art, the above structure is exquisitely designed. The steel ball is always under the pressure of the hydraulic oil. When the coil is energized, the push rod 6 moves forward under the action of the electromagnetic force, overcomes the force of the hydraulic oil on the steel ball, and opens the P hole 4. When the coil is not energized or loses power, the steel ball is always completely in close contact with the P hole only under the action of the hydraulic oil, which can avoid the leakage of hydraulic oil and improve safety. In addition, the spring, valve core cover and other structures are eliminated, so there is no aging or deformation, which not only improves safety, but also optimizes the overall structure, improves the convenience of assembly, and reduces costs, and has a wide range of applicability.

[0031] The accommodating cavity 11 includes a large diameter end 12 and a small diameter end 13, the A hole 2 is opened on the small diameter end 13, the B hole 3 is opened on the large diameter end, and the sealing plug 7 is made of elastic material, and its diameter is between the diameters of the large diameter end 12 and the small diameter end 13. Specifically, the push rod 6 includes an integrally formed large diameter portion 61 and a small diameter portion 62, and a clamping groove 63 is opened on the end side of the large diameter portion 61 close to the small diameter portion 62; the sealing plug 7 at least includes an integrally formed truncated cone end 71 and a hook end 72, the hook end 72 is clamped in the clamping groove 63, the truncated cone end 71 is sleeved on the small diameter portion 62, and its end face is in an arc shape. When the sealing plug is separated from the large diameter end and the small diameter end, it will deform, making the sealing effect stronger, and one end face of the sealing plug is an arc face, which can ensure that its deformation is the overall deformation of the entire end face, avoiding wrinkles and the like, and further ensuring the sealing effect.

[0032] A retainer 51 is fixedly provided at the end side of the cylinder 1, and the steel ball 5 is movably arranged in the retainer 51. The end surface of the P hole 4 is provided with an arc groove adapted to the outer contour of the steel ball 5. The structure of the retainer 51 is prior art and is not a design point of the present invention, so it will not be described in detail here.

[0033] The outer circumferential surface of the cylinder 1 is provided with a sealing groove 14, and a sealing ring 15 adapted thereto is provided in the sealing groove 14, and the sealing ring 15 is located on both sides of the A hole 2. The setting of the sealing ring 15 can play a sealing role, prevent the leakage of hydraulic oil, and improve the cleanliness.

[0034] The electromagnet at least includes a shell 9 fixed on the cylinder 1. The shell 9 and the cylinder 1 can be split and connected together by screwing, welding, riveting, etc., or an integrated structure can be adopted. Corresponding adjustments can be made according to actual needs, all of which fall within the protection scope of the present invention and will not be elaborated here.

[0035] A coil box 91 is fixedly provided on the inner wall of the shell 9, and a coil 92 is built in the coil box 91. A fixed iron core 93 is also fixedly provided on the cylinder 1. A movable iron core 94 is provided on one side of the fixed iron core 93 and can move relative to the fixed iron core 93. The push rod 6 is fixedly provided on the movable iron core 94, and the push rod 6 extends through the fixed iron core 93 and is placed outside the fixed iron core 93. When the coil 92 is energized, the current generates a magnetic field around the coil 92, so that there is an adsorption force between the fixed iron core 93 and the movable iron core 94.

[0036] In this preferred embodiment, the housing 9 is composed of a shell 97 and flanges 96 and a cover plate 95 arranged at both ends thereof. The flange 96, the cover plate 95 and the shell 97 constitute a circuit, and all three are made of iron. The flange 96, the cover plate 95 and the shell 97 cooperate with each other to form a magnetic conductive part, which can concentrate the magnetic field force and make the magnetic field distribution more dense, thereby maximizing the attraction force, ensuring the force of the moving iron core 94 and the fixed iron core 93 to attract each other, and improving stability.

[0037] Furthermore, the housing 9 is built with a bushing 99, one end of which is seamlessly connected to the cover plate 95, and the other end is seamlessly connected to the flange 96. A receiving cavity is provided in the bushing 99, and the fixed iron core 93 and the moving iron core 94 are arranged in the receiving cavity. The fixed iron core 93 and the moving iron core 94 are also provided with an oil discharge path 98, and the oil discharge path 98 is connected to the receiving cavity 11. The provision of the bushing 99 and the oil discharge path 98 can not only prevent the hydraulic oil from flowing into the coil box, thereby improving safety, but also play a lubricating role on the moving iron core 94, reduce the friction generated during the movement of the moving iron core, extend the service life, and also play a role in noise reduction.

[0038] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0039] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. Dual-channel solenoid control valve, characterized by: The invention comprises an electromagnet and a controller arranged on one side thereof, wherein the controller comprises at least a cylinder (1) extending along the axial direction of the electromagnet, an A hole (2) and a B hole (3) arranged front and rear on the outer circumferential surface of the cylinder (1), a P hole (4) being arranged on the free end side of the cylinder (1), and a steel ball (5) capable of selectively sealing the P hole (4) being arranged in the inner cavity of the free end of the cylinder (1); a receiving cavity (11) being arranged in the cylinder (1), a push rod (6) driven by the electromagnet being arranged in the receiving cavity (11), the diameter of the end side of the push rod (6) being smaller than the diameter of the P hole (4), and being capable of at least partially extending outside the P hole (4); a sealing plug (7) capable of selectively isolating the communication channel between the A hole (2) and the B hole (3) being sleeved on the push rod (6); When the electromagnet is energized, the electromagnet drives the push rod (6) to move forward, and the sealing plug (7) completely blocks the communication passage between the A hole (2) and the B hole (3); at the same time, the free end portion of the push rod (6) extending outside the P hole (4) pushes the steel ball (5) open, and the A hole (2) is connected to the P hole (4), thereby forming a first circuit; When the electromagnet loses power, the electromagnet drives the push rod (6) to move backwards, and the steel ball (5) is only subjected to the force exerted by the hydraulic oil and is tightly attached to one side of the P hole (4) to seal it; at the same time, a connecting channel connecting the A hole (2) and the B hole (3) is formed between the outer circumferential surface of the sealing plug (7) and the inner wall of the cylinder (1), thereby forming a second circuit.

2. The dual-channel electromagnetic control valve according to claim 1, characterized in that: The accommodating cavity (11) comprises a large diameter end (12) and a small diameter end (13), the A hole (2) is opened on the small diameter end (13), the B hole (3) is opened on the large diameter end, and the sealing plug (7) is made of elastic material, and its diameter is between the diameters of the large diameter end (12) and the small diameter end (13).

3. The dual-channel electromagnetic control valve according to claim 2, characterized in that: The push rod (6) comprises an integrally formed large diameter portion (61) and a small diameter portion (62), and a groove (63) is provided on the end side of the large diameter portion (61) close to the small diameter portion (62); the sealing plug (7) comprises at least an integrally formed truncated cone end (71) and a hook end (72), the hook end (72) being clamped in the groove (63), and the truncated cone end (71) being sleeved on the small diameter portion (62), and its end surface being in an arc shape.

4. The dual-channel electromagnetic control valve according to any one of claims 1 to 3, characterized in that: A retaining frame (51) is fixedly provided on the end side of the cylinder (1), the steel ball (5) is movably arranged in the retaining frame (51), and an arc-shaped groove matching the outer contour of the steel ball (5) is formed on the end surface of the P hole (4).

5. The dual-channel electromagnetic control valve according to any one of claims 1 to 3, characterized in that: The outer circumferential surface of the cylinder (1) is provided with a sealing groove (14), and a sealing ring (15) matching the sealing groove (14) is provided in the sealing groove (14), and the sealing ring (15) is located on both sides of the A hole (2).

6. The dual-channel electromagnetic control valve according to claim 1, characterized in that: The electromagnet comprises at least a shell (9) fixedly mounted on the cylinder (1), a coil box (91) fixedly mounted on the inner wall of the shell (9), a coil box (91) containing a coil (92), a fixed iron core (93) fixedly mounted on the cylinder (1), a movable iron core (94) movable relative to the fixed iron core (93) being disposed on one side of the fixed iron core (93), a push rod (6) fixedly mounted on the movable iron core (94), and the push rod (6) passing through the fixed iron core (93) and extending to the outside thereof.

7. The dual-channel electromagnetic control valve according to claim 6, characterized in that: The housing (9) has a built-in bushing (99), one end of the bushing (99) is seamlessly connected to the cover plate (95), and the other end is seamlessly connected to the flange (96), a receiving cavity is provided in the bushing (99), and the fixed iron core (93) and the moving iron core (94) are arranged in the receiving cavity.

8. The dual-channel electromagnetic control valve according to claim 7, characterized in that: The housing (9) is composed of a shell (97) and flanges (96) and a cover plate (95) arranged at both ends thereof. The flange (96), the cover plate (95) and the shell (97) form a circuit, and all three are made of iron.

9. The dual-channel electromagnetic control valve according to claim 8, characterized in that: The fixed iron core (93) and the movable iron core (94) are also provided with an oil discharge path (98), and the oil discharge path (98) is in communication with the accommodating cavity (11).

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