Pushing mechanism of hydraulic control device

Abstract

The pushing mechanism of the hydraulic control device comprises a valve body, a motor, a transmission mechanism and a spring, the motor is connected to the valve body, a valve element is arranged in the valve body, the transmission mechanism is arranged between the motor and the valve element to push the valve element to be far away from the motor in the axial direction, and the spring is arranged between the valve body and the valve element to push the valve element to be far away from the motor when the transmission mechanism returns. And the valve core is pushed to return. The transmission mechanism is driven by the motor to push the valve element to move, thrust output by the motor is more linearly controllable, the instant acting force on the valve element is small, the conditions of hydraulic vibration and the like are avoided, the valve element can adapt to the conditions of high temperature and low temperature, and the acting force on the valve element is larger and more stable; and the valve core can be pushed to more positions to control a more complex hydraulic system.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic equipment, in particular to a driving mechanism of a hydraulic control device. Background Art

[0002] In existing equipment, hydraulic reversing valves are all provided with thrust by electromagnetics, which provide a large thrust instantly, easily generate hydraulic shock in the valve body, and can only control the valve core to move to one position. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a driving mechanism of a hydraulic control device, including a valve body, a motor, a transmission mechanism and a spring. The motor is connected to the valve body, a valve core is arranged in the valve body, the transmission mechanism is arranged between the motor and the valve core to push the valve core axially away from the motor, and the spring is arranged between the valve body and the valve core to push the valve core back when the transmission mechanism returns.

[0004] Preferably, the transmission mechanism includes a screw rod and a screw sleeve, the screw rod is mounted on the valve body, the screw sleeve is mounted on the motor, a guide sleeve is fixed on the valve body, a guide block is fixed on the screw rod, the guide block is arranged in the guide sleeve to limit the radial rotation of the screw rod, the screw rod is connected to the screw sleeve to drive the screw rod to move axially when the screw sleeve rotates, and the valve core is arranged at one end of the screw rod so that the screw rod pushes the valve core to move away from the motor when it moves.

[0005] Preferably, the valve body comprises a main body and an end cover, the end cover is arranged between the main body and the motor, the screw rod is mounted on the end cover and one end is connected to the motor and the other end is against the valve core.

[0006] Preferably, an installation opening is provided at one end of the main body facing the end cover, a sealing sleeve is fixed on the installation opening, an installation groove is provided at the end of the sealing sleeve facing away from the main body, an inner sleeve is provided in the installation groove, a sealing ring is provided between the sealing sleeve and the inner sleeve, an external thread is provided at the end of the sealing sleeve facing away from the main body, a clamping nut is connected to the external thread, and the screw rod is passed through the sealing sleeve, the inner sleeve, the sealing ring and the clamping nut.

[0007] Preferably, the inner sleeve is a PTFE sleeve.

[0008] Preferably, a blocking cover is provided at one end of the valve body facing away from the motor, a receiving groove is provided on the blocking cover, a baffle is provided at one end of the valve core facing away from the screw rod, and a spring is provided in the receiving groove and against the baffle.

[0009] The beneficial effects of the utility model are as follows: the valve core is pushed to move by the transmission mechanism driven by the motor, the thrust output by the motor is more linear and controllable, the instantaneous force on the valve core is smaller, no hydraulic shock and the like are generated, and it can adapt to high and low temperature conditions, and the force on the valve core is also greater and more stable; the valve core can be pushed to more positions and more complex hydraulic systems can be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cutaway structural diagram of the utility model. DETAILED DESCRIPTION

[0011] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0012] See also Figure 1 The utility model provides a driving mechanism of a hydraulic control device, including a valve body 1, a motor 2, a transmission mechanism and a spring 6. The motor 2 is connected to the valve body 1, a valve core 7 is arranged in the valve body 1, the transmission mechanism is arranged between the motor 2 and the valve core 7 to push the valve core 7 away from the motor 2 in the axial direction, and the spring 6 is arranged between the valve body 1 and the valve core 7 to push the valve core 7 back to its position when the transmission mechanism returns to its position.

[0013] The valve core 7 is pushed to move by the transmission mechanism driven by the motor 2. The thrust output by the motor 2 is more linear and controllable, and the instantaneous force on the valve core 7 is smaller, and no hydraulic shock will occur. It can adapt to high and low temperature conditions, and the force on the valve core 7 is also greater and more stable. The valve core 7 can be pushed to more positions and more complex hydraulic systems can be controlled.

[0014] Furthermore, the transmission mechanism includes a screw rod 4 and a screw sleeve 3, the screw rod 4 is mounted on the valve body 1, the screw sleeve 3 is mounted on the motor 2, a guide sleeve 5 is fixed on the valve body 1, a guide block 9 is fixed on the screw rod 4, the guide block 9 is arranged in the guide sleeve 5 to limit the radial rotation of the screw rod 4, the screw rod 4 is connected to the screw sleeve 3 to drive the screw rod 4 to move axially when the screw sleeve 3 rotates, and the valve core 7 is arranged at one end of the screw rod 4 so that the screw rod 4 pushes the valve core 7 to move away from the motor 2 when it moves.

[0015] During operation, the motor 2 drives the screw sleeve 3 to drive the screw rod 4 to move forward and backward, thereby pushing the valve core 7 to move or retract the screw rod 4. The structure is simple and the operation is reliable.

[0016] Furthermore, the valve body 1 includes a main body 11 and an end cover 12 . The end cover 12 is disposed between the main body 11 and the motor 2 . The screw rod 4 is mounted on the end cover 12 and one end of the screw rod 4 is connected to the motor 2 , and the other end of the screw rod 4 abuts against the valve core 7 .

[0017] Through the design of the end cover 12, the end cover 12 can be used to position and fix the components after they are installed, making it more convenient to install components such as the screw rod 4.

[0018] Furthermore, an installation opening 13 is provided at one end of the main body 11 facing the end cover 12, a sealing sleeve 14 is fixed on the installation opening 13, an installation groove 15 is provided at one end of the sealing sleeve 14 facing away from the main body 11, an inner sleeve 16 is provided in the installation groove 15, a sealing ring 17 is provided between the sealing sleeve 14 and the inner sleeve 16, an external thread is provided at one end of the sealing sleeve 14 facing away from the main body 11, a clamping nut 18 is connected to the external thread, and the screw rod 4 is inserted into the sealing sleeve 14, the inner sleeve 16, the sealing ring 17 and the clamping nut 18.

[0019] Through the double sleeve design of the inner sleeve 16 and the sealing sleeve 14, the inner sleeve 16 can cooperate closely with the screw rod 4 to ensure sealing, and the sealing sleeve 14 can ensure the cooperation strength with other components. Then, the gap between the sealing sleeve 14 and the inner sleeve 16 is closed by the sealing ring 17 to avoid leakage between the sealing sleeve 14 and the inner sleeve 16.

[0020] Furthermore, the inner sleeve 16 is a PTFE sleeve, which ensures sealing while reducing friction on the screw rod 4.

[0021] Furthermore, a plug cover 81 is provided at one end of the valve body 1 facing away from the motor 2 , a receiving groove 82 is provided on the plug cover 81 , a baffle 83 is provided at one end of the valve core 7 facing away from the screw rod 4 , and the spring 6 is arranged in the receiving groove 82 and abuts against the baffle 83 .

[0022] The design of the plugging cover 81, the receiving groove 82 and the baffle 83 facilitates the installation of the spring 6, and when the spring 6 fails, the plugging cover 81 can be removed to replace it, which is convenient for equipment maintenance.

[0023] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A driving mechanism of a hydraulic control device, characterized in that: The invention comprises a valve body (1), a motor (2), a transmission mechanism and a spring (6), wherein the motor (2) is connected to the valve body (1), a valve core (7) is arranged in the valve body (1), the transmission mechanism is arranged between the motor (2) and the valve core (7) to push the valve core (7) axially away from the motor (2), and the spring (6) is arranged between the valve body (1) and the valve core (7) to push the valve core (7) back to its original position when the transmission mechanism returns to its original position.

2. The driving mechanism of the hydraulic control device according to claim 1, characterized in that: The transmission mechanism comprises a screw rod (4) and a screw sleeve (3), wherein the screw rod (4) is mounted on a valve body (1), and the screw sleeve (3) is mounted on a motor (2). A guide sleeve (5) is fixed on the valve body (1), and a guide block (9) is fixed on the screw rod (4). The guide block (9) is arranged in the guide sleeve (5) to limit the radial rotation of the screw rod (4). The screw rod (4) is connected to the screw sleeve (3) to drive the screw rod (4) to move axially when the screw sleeve (3) rotates. The valve core (7) is arranged at one end of the screw rod (4) so ​​that the screw rod (4) pushes the valve core (7) to move in a direction away from the motor (2) when moving.

3. The driving mechanism of the hydraulic control device according to claim 2, characterized in that: The valve body (1) comprises a main body (11) and an end cover (12); the end cover (12) is arranged between the main body (11) and the motor (2); the screw rod (4) is mounted on the end cover (12) and one end of the screw rod is connected to the motor (2) and the other end of the screw rod is against the valve core (7).

4. The driving mechanism of the hydraulic control device according to claim 3, characterized in that: The main body (11) is provided with a mounting opening (13) at one end facing the end cover (12), a sealing sleeve (14) is fixed on the mounting opening (13), the sealing sleeve (14) is provided with a mounting groove (15) at one end facing away from the main body (11), an inner sleeve (16) is arranged in the mounting groove (15), a sealing ring (17) is arranged between the sealing sleeve (14) and the inner sleeve (16), an external thread is arranged at one end facing away from the main body (11), a clamping nut (18) is connected to the external thread, and the screw rod (4) is inserted into the sealing sleeve (14), the inner sleeve (16), the sealing ring (17) and the clamping nut (18).

5. The driving mechanism of the hydraulic control device according to claim 4, characterized in that: The inner sliding sleeve (16) is a PTFE sliding sleeve.

6. The driving mechanism of the hydraulic control device according to claim 2, characterized in that: A blocking cover (81) is provided at one end of the valve body (1) facing away from the motor (2), and a receiving groove (82) is provided on the blocking cover (81); a baffle (83) is provided at one end of the valve core (7) facing away from the screw rod (4), and the spring (6) is arranged in the receiving groove (82) and abuts against the baffle (83).

Images