A quick response three-position four-way electromagnetic cartridge valve

Abstract

This utility model relates to the field of hydraulic lifting technology for truck body panels, and discloses a fast-response three-position four-way electromagnetic cartridge valve, including a valve sleeve and a valve core. The valve sleeve and valve core cooperate to control the on / off and flow direction of hydraulic oil. An electromagnetic push-pull rod is connected to the valve core via a connecting pin and is used to drive the valve core to move. An electromagnetic sleeve is provided, with the valve sleeve threaded onto the electromagnetic sleeve, which is then threaded onto the valve block. The electromagnetic sleeve contains a right spring seat, a spring, and a left spring seat, with the right spring seat pressed against the electromagnetic sleeve. In this utility model, the valve sleeve is threaded onto the electromagnetic sleeve, which is then fixed onto the valve block, forming a cartridge-type integrated structure. Multiple cartridge valves can be installed in one valve block, significantly reducing installation space and solving the problems of large size and the need for large space when multiple valves are connected in parallel in traditional three-position four-way directional valves.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic lifting technology for truck body panels, and in particular to a fast-response three-position four-way electromagnetic cartridge valve. Background Technology

[0002] A fast-response three-position four-way electromagnetic cartridge valve is a key component for realizing media reversal in hydraulic systems. It is widely used in hydraulic lifting of truck boxes, hydraulic control of construction machinery and other fields. As industrial equipment develops towards miniaturization and high efficiency, the requirements for the space occupation, response speed and integration capability of hydraulic components are constantly increasing. This cartridge valve is a new type of reversing control device developed to meet these needs.

[0003] Existing three-position four-way directional valves typically adopt an integral valve body structure, with the valve core located inside the valve body. Axial movement is achieved through manual operation or hydraulic drive, thereby changing the on / off state of each oil port. The valve body has independent oil inlet, oil outlet, and oil return ports, and is connected to the hydraulic system through external pipelines. The reset function is mostly achieved by spring force or hydraulic feedback, and the overall structure is relatively loose.

[0004] Existing three-position four-way directional valves have a large volume of individual valve bodies due to their split structure design. When a hydraulic system requires multiple directional valves to work in parallel, not only is it necessary to reserve independent installation space for each valve body, but also to arrange a large number of connecting pipelines. This results in a significant increase in the overall space occupied by the system, which greatly limits the application of hydraulic systems in space-constrained scenarios and reduces the flexibility of equipment layout. To address these issues, a fast-response three-position four-way electromagnetic cartridge valve is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a fast-response three-position four-way electromagnetic cartridge valve, which aims to improve the problems of large size and large space required when multiple valves are connected in parallel in the existing technology of traditional three-position four-way directional valves.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a fast-response three-position four-way electromagnetic cartridge valve, characterized in that it comprises:

[0007] Valve sleeve and valve core, the valve sleeve and valve core cooperate to control the on / off and flow direction of hydraulic oil;

[0008] An electromagnetic push-pull rod is connected to the valve core via a connecting rod, and the electromagnetic push-pull rod is used to drive the valve core to move;

[0009] An electromagnet sleeve is provided, wherein the valve sleeve is fixed to the electromagnet sleeve by threads, and the electromagnet sleeve is fixed to the valve block by threads. Inside the electromagnet sleeve, there is a right spring seat, a spring, and a left spring seat. The right spring seat is close to the electromagnet sleeve, and the spring sleeve is located between the right spring seat and the left spring seat.

[0010] Electromagnets SOLA and SOLB are mounted on an electromagnet sleeve. When electromagnet SOLA is energized, it pulls the electromagnetic push-pull rod to the right, and when electromagnet SOLB is energized, it pushes the electromagnetic push-pull rod to the left.

[0011] A sealing assembly, comprising O-ring one, O-ring two, and O-ring three, for separating port P, port A, port B, and port T.

[0012] Furthermore, the spring ensures that the valve core remains in a neutral position when the electromagnet is de-energized.

[0013] Furthermore, when the valve core is in the neutral position, port P is sealed, while ports A, B, and T are connected.

[0014] Furthermore, when the electromagnet SOLA is energized and the electromagnetic push-pull rod moves to the right, pressure oil flows through port P and port B, and return oil flows through port A and port T.

[0015] Furthermore, when the electromagnet SOLB is energized and the electromagnetic push-pull rod moves to the left, pressure oil flows through port P and port A, and return oil flows through port B and port T.

[0016] Furthermore, the threaded connection between the valve sleeve and the electromagnet sleeve is a sealed threaded connection, which can prevent hydraulic oil leakage.

[0017] Furthermore, the outer wall of the valve core and the inner wall of the valve sleeve have a fitting accuracy of IT level to ensure good sealing and flexible movement.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the valve sleeve is fixed to the electromagnet sleeve by threads, and the electromagnet sleeve is then fixed to the valve block to form a cartridge integrated structure. Multiple cartridge valves can be installed in one valve block, which achieves the effect of greatly reducing the installation space. This solves the problem of the traditional three-position four-way directional valve being large in size and requiring a large space when multiple valves are connected in parallel, and improves the flexibility of hydraulic system layout and installation convenience.

[0020] 2. In this utility model, the electromagnet drives the electromagnetic push-pull rod to move the valve core. With the help of the spring, the valve core is ensured to return to the neutral position when the power is off. At the same time, the O-ring accurately separates each oil port, achieving the effect of rapid action response, stable working state and reliable sealing. This solves the problem of slow response or poor sealing of traditional directional valves and improves the working efficiency and operational reliability of the hydraulic system. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a fast-response three-position four-way electromagnetic cartridge valve proposed in this utility model.

[0022] Legend:

[0023] 1. Valve sleeve; 2. Valve core; 3. Connecting pin; 4. Electromagnetic push-pull rod; 5. Right spring seat; 6. Spring; 7. Left spring seat; 8. Electromagnet sleeve; 9. O-ring one; 10. O-ring two; 11. O-ring three; 12. Electromagnet SOLA; 13. Electromagnet SOLB. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 The present invention provides an embodiment of a fast-response three-position four-way electromagnetic cartridge valve, characterized in that it comprises:

[0026] Valve sleeve 1 and valve core 2. Valve sleeve 1 provides precision guidance and mounting base for valve core 2. Valve core 2 changes its relative position with valve sleeve 1 by axial movement. The two work together to precisely control the on / off and flow direction of hydraulic oil, ensuring that the hydraulic circuit runs according to the preset path.

[0027] Electromagnetic push-pull rod 4 is rigidly connected to valve core 2 via connecting pin 3, which can directly transmit electromagnetic force to valve core 2. Electromagnetic push-pull rod 4 is used to efficiently drive valve core 2 to move quickly and shorten the switching response time.

[0028] The electromagnet sleeve 8 and valve sleeve 1 are fixed to the electromagnet sleeve 8 by threads, forming a compact integrated structure. The electromagnet sleeve 8 is fixed to the valve block by threads, realizing the stable installation of the whole device. The electromagnet sleeve 8 is equipped with a right spring seat 5, a spring 6 and a left spring seat 7. The right spring seat 5 is close to the electromagnet sleeve 8 to play an axial positioning role. The spring 6 is sleeved between the right spring seat 5 and the left spring seat 7. The extension and retraction direction of the spring 6 is constrained by the two end seats to ensure stable output of elastic force.

[0029] Electromagnets SOLA12 and SOLB13 are mounted on the electromagnet sleeve 8 to provide a power source for the movement of the valve core 2. When electromagnet SOLA12 is energized, it generates an electromagnetic attraction force to pull the electromagnetic push-pull rod 4 to the right. When electromagnet SOLB13 is energized, it generates an electromagnetic thrust force to push the electromagnetic push-pull rod 4 to the left, thereby realizing the bidirectional controllable movement of the valve core 2.

[0030] The sealing assembly includes O-ring 19, O-ring 20 and O-ring 31, which tightly fit the mating surfaces through elastic deformation to strictly separate the P port, A port, B port and T port and prevent hydraulic oil from flowing between different ports.

[0031] Reference Figure 1 When the electromagnet is de-energized, spring 6 relies on its own elastic restoring force to ensure that valve core 2 remains accurately in the neutral position, ensuring the system remains stable in the non-working state. When valve core 2 is in the neutral position, port P is sealed to block the input of pressure oil, while ports A, B, and T are connected to achieve unobstructed return oil flow. When electromagnet SOLA12 is energized and electromagnetic push-pull rod 4 moves to the right, pressure oil flows through ports P and B to provide power to the actuator, and return oil flows through ports A and T to achieve oil circulation. When electromagnet SOLB13 is energized and electromagnetic push-pull rod 4 moves to the left, pressure oil flows through ports P and A to drive the actuator to move in the opposite direction, and return oil flows through ports B and T to complete the return flow of oil. The threaded connection between valve sleeve 1 and electromagnet sleeve 8 is a sealed threaded connection. Through the tight contact of the threaded mating surfaces and the sealing effect, hydraulic oil leakage can be effectively prevented. The fit accuracy between the outer wall of valve core 2 and the inner wall of valve sleeve 1 is IT7 grade. The high-precision fit reduces gap leakage and reduces motion friction resistance to ensure good sealing and motion flexibility.

[0032] Working principle: This valve achieves space optimization through a cartridge structure. The valve sleeve 1 and the electromagnet sleeve 8 are connected by a sealing thread. The electromagnet sleeve 8 is then fixed to the valve block, forming an integrated unit. Multiple cartridge valves can be integrated into the same valve block, significantly reducing installation space and solving the problem of large size of traditional valves. During operation, electromagnet SOLA12 or electromagnet SOLB13 provides power. The electromagnetic push rod 4 is connected to the valve core 2 via the connecting pin 3 to realize the transmission of force. When electromagnet SOLA12 is energized, the electromagnetic push rod 4 moves to the right, causing the valve core 2 to move to the right, so that pressure oil flows through the P port and the B port. Oil return flows through ports A and T. When electromagnet SOLB13 is energized, electromagnetic push-pull rod 4 moves to the left, valve core 2 moves to the left, pressure oil flows through ports P and A, and return oil flows through ports B and T. Electromagnetic drive ensures rapid response. After power is cut off, spring 6 is reset under the positioning of right spring seat 5 and left spring seat 7, keeping valve core 2 in a neutral position. At this time, port P is closed, and ports A, B, and T are connected. O-rings 9, 10, and 11 separate each oil port. The valve core 2 with IT7 precision fits with the valve sleeve and sealing threads to prevent leakage, ensure stable operation, and improve system efficiency and reliability.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fast-response three-position four-way electromagnetic cartridge valve, characterized in that, include: Valve sleeve (1) and valve core (2), wherein the valve sleeve (1) and valve core (2) cooperate to control the on / off and flow direction of hydraulic oil; An electromagnetic push-pull rod (4) is connected to the valve core (2) via a connecting pin (3). The electromagnetic push-pull rod (4) is used to drive the valve core (2) to move. Electromagnet sleeve (8), the valve sleeve (1) is fixed to the electromagnet sleeve (8) by threads, the electromagnet sleeve (8) is fixed to the valve block by threads, the electromagnet sleeve (8) is provided with a right spring seat (5), a spring (6) and a left spring seat (7) inside the electromagnet sleeve (8), the right spring seat (5) is close to the electromagnet sleeve (8), and the spring (6) is sleeved between the right spring seat (5) and the left spring seat (7); Electromagnet SOLA (12) and electromagnet SOLB (13) are mounted on an electromagnet sleeve (8). When the electromagnet SOLA (12) is energized, it pulls the electromagnetic push-pull rod (4) to the right. When the electromagnet SOLB (13) is energized, it pushes the electromagnetic push-pull rod (4) to the left. A sealing assembly comprising O-ring one (9), O-ring two (10) and O-ring three (11) for separating the P port, A port, B port and T port.

2. The fast-response three-position four-way electromagnetic cartridge valve according to claim 1, characterized in that: The spring (6) ensures that the valve core (2) remains in a neutral position when the electromagnet is de-energized.

3. The fast-response three-position four-way electromagnetic cartridge valve according to claim 1, characterized in that: When the valve core (2) is in the neutral position, port P is sealed, while ports A, B and T are connected.

4. A fast-response three-position four-way electromagnetic cartridge valve according to claim 1, characterized in that: When the electromagnet SOLA (12) is energized and the electromagnetic push-pull rod (4) moves to the right, pressure oil is supplied through port P and port B, and return oil is supplied through port A and port T.

5. A fast-response three-position four-way electromagnetic cartridge valve according to claim 1, characterized in that: When the electromagnet SOLB(13) is energized and the electromagnetic push-pull rod(4) moves to the left, pressure oil is supplied through port P and port A, and return oil is supplied through port B and port T.

6. A fast-response three-position four-way electromagnetic cartridge valve according to claim 1, characterized in that: The threaded connection between the valve sleeve (1) and the electromagnet sleeve (8) is a sealed threaded connection, which can prevent hydraulic oil leakage.

7. A fast-response three-position four-way electromagnetic cartridge valve according to claim 1, characterized in that: The outer wall of the valve core (2) and the inner wall of the valve sleeve (1) have a fitting accuracy of IT7 to ensure good sealing and flexible movement.

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