Hydraulic circuit of hydraulic motor locking oil cylinder
By designing a hydraulic motor to lock the hydraulic circuit of the oil cylinder, using hydraulic control valves, hydraulic motors, oil cylinders and other components, the problem of hydraulic oil leakage caused by the oil cylinder extension is solved, and the effective retraction and service life of the oil cylinder are achieved. promote.
Patent Information
- Application Number
- CN202420090000.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-15
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-01-15
AI Technical Summary
In hydraulic systems, when the hydraulic control valve replaces the solenoid control valve, the cylinder is in an extended state due to the leakage of hydraulic oil, which affects the service life of the cylinder.
A hydraulic motor locks the hydraulic circuit of the oil cylinder. Through the combination of a hydraulic control valve, a hydraulic motor, a first cylinder and a second cylinder, the shuttle valve, a one-way valve and a throttle valve are used to realize the movement of the hydraulic motor. The oil cylinder is retracted and flows back to the oil tank through the throttle valve when it leaks in the hydraulic control valve to prevent the oil cylinder from protruding.
It effectively avoids the oil cylinder extension caused by internal leakage, improves the service life of the oil cylinder, and improves the safety of the system.
Smart Images
Figure CN222457929U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field, in particular to a hydraulic motor locking cylinder hydraulic circuit. Background Art
[0002] Hydraulic motors and cylinders are commonly used hydraulic components in hydraulic systems. In hydraulic systems, hydraulic motors and cylinders usually have a sequence of movement or a logical relationship of movement. Usually, the logical movement relationship between hydraulic motors and cylinders is achieved through electromagnetic control valves. In harsh environments, electromagnetic control valves are prone to failure or malfunction, causing safety accidents.
[0003] The hydraulic control valve that can replace the electromagnetic control valve will not be affected by this situation. However, it should be noted that when the hydraulic motor is working, the cylinder cannot be in the extended state. When the hydraulic motor does not work for a long time, the hydraulic control valve will cause internal leakage after long-term use. When the leaked hydraulic oil enters the cylinder, the cylinder will be in the extended state, affecting the service life of the cylinder.
[0004] Therefore, it is necessary to propose a hydraulic motor locking cylinder hydraulic circuit to prevent the cylinder from being in an extended state due to internal leakage, so as to increase the service life of the cylinder. Utility Model Content
[0005] The utility model aims to solve the problem in the prior art that when a hydraulic control valve replaces an electromagnetic control valve, the oil cylinder is in an extended state due to internal leakage of hydraulic oil, thereby affecting the service life of the oil cylinder. A hydraulic motor locking oil cylinder hydraulic circuit is now provided.
[0006] The technical solution of the utility model is:
[0007] A hydraulic motor locking cylinder hydraulic circuit, comprising a hydraulic control valve, a hydraulic motor, a first cylinder and a second cylinder, wherein the hydraulic control valve is provided with an interface A1 and an interface B1, wherein the interface A1 is communicated with a rodless cavity of the first cylinder, and the interface B1 is communicated with a rod cavity of the first cylinder;
[0008] The hydraulic control valve is provided with an interface A2 and an interface B2, wherein the interface A2 is communicated with the interface A on the hydraulic motor, and the interface B2 is communicated with the interface B on the hydraulic motor;
[0009] The hydraulic control valve is provided with an interface A3 and an interface B3, wherein the interface A3 is communicated with the rod chamber of the second oil cylinder, and the interface B3 is communicated with the rodless chamber of the second oil cylinder;
[0010] The rod chamber of the first oil cylinder and the rod chamber of the second oil cylinder are connected through a first pipeline, and the A port and the B port of the hydraulic motor are connected through a second pipeline. A one-way valve is provided between the first pipeline and the second pipeline, and the one-way valve is connected to the first pipeline and the second pipeline respectively.
[0011] Furthermore, a shuttle valve is provided on the second pipeline, and an interface MA and an interface MB are provided on the shuttle valve, the interface MA is communicated with the interface A, the interface MB is communicated with the interface B, and the shuttle valve is communicated with the one-way valve.
[0012] Furthermore, the shuttle valve is communicated with the oil inlet hole of the one-way valve.
[0013] Furthermore, the rodless chamber of the first oil cylinder and the rodless chamber of the second oil cylinder are communicated with each other through a third pipeline.
[0014] Furthermore, a first throttle valve and a second throttle valve are installed on the third pipeline, the first throttle valve is communicated with the rodless chamber of the first oil cylinder, and the second throttle valve is communicated with the rodless chamber of the second oil cylinder.
[0015] The utility model discloses a hydraulic motor locking cylinder hydraulic circuit. When the hydraulic control valve controls the motor movement, when the motor rotates forward, oil enters port A and oil returns from port B. The high-pressure oil from port A will enter the rod chamber of the cylinder through the shuttle valve, thereby retracting the cylinder. When the motor rotates reversely, oil enters port B and oil returns from port A. The high-pressure oil from port B will enter the rod chamber of the cylinder through the second circuit, thereby retracting the cylinder. When the motor is not in motion, the oil that enters the rodless chamber of the cylinder due to internal leakage of the hydraulic control valve will enter the oil tank through the throttle valve, thereby avoiding the extension of the cylinder. When the cylinder is in motion, the one-way valve only allows the oil to flow from the motor high-pressure oil to the rod chamber of the cylinder. Therefore, when the hydraulic control valve controls the retraction of the cylinder alone, it has no effect on the movement of the motor, thereby realizing the locking function of the hydraulic motor on the cylinder. Compared with the traditional technology, the technical solution avoids the cylinder being in an extended state due to internal leakage, thereby improving the service life of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural reference diagram of the utility model.
[0017] Figure numerals: 1. hydraulic control valve; 2. hydraulic motor; 3. shuttle valve; 4. one-way valve; 5. first oil cylinder; 6. first throttle valve; 7. second throttle valve; 8. second oil cylinder; 9. first pipeline; 10. second pipeline; 11. third pipeline. DETAILED DESCRIPTION
[0018] In order to make the technical means, technical features, utility model objectives and technical effects achieved by the utility model easy to understand, the utility model is further explained below with reference to specific illustrations.
[0019] Embodiment 1:
[0020] like Figure 1As shown, this embodiment provides a hydraulic motor locking cylinder hydraulic circuit, including a hydraulic control valve, a hydraulic motor, a first cylinder and a second cylinder, the hydraulic control valve is provided with an interface A1 and an interface B1, the interface A1 is connected to the rodless chamber of the first cylinder, the interface B1 is connected to the rod chamber of the first cylinder, the hydraulic control valve is provided with an interface A2 and an interface B2, the interface A2 is connected to the interface A on the hydraulic motor, the interface B2 is connected to the interface B on the hydraulic motor, the hydraulic control valve is provided with an interface A3 and an interface B3, the interface A3 is connected to the rod chamber of the second cylinder, the interface B3 is connected to the rodless chamber of the second cylinder, the rod chamber of the first cylinder and the rod chamber of the second cylinder are connected through a first pipeline, the A port and the B port of the hydraulic motor are connected through a second pipeline, a one-way valve is provided between the first pipeline and the second pipeline, and the one-way valve is respectively connected to the first pipeline and the second pipeline.
[0021] Preferably, a shuttle valve is provided on the second pipeline, and an interface MA and an interface MB are provided on the shuttle valve, the interface MA is communicated with the interface A, the interface MB is communicated with the interface B, and the shuttle valve is communicated with the one-way valve.
[0022] Preferably, the shuttle valve is communicated with the oil inlet hole of the one-way valve.
[0023] Preferably, the rodless chamber of the first oil cylinder and the rodless chamber of the second oil cylinder are connected through a third pipeline.
[0024] Preferably, a first throttle valve and a second throttle valve are installed on the third pipeline, the first throttle valve is communicated with the rodless chamber of the first oil cylinder, and the second throttle valve is communicated with the rodless chamber of the second oil cylinder.
[0025] When working, the hydraulic control valve 1 controls the extension and retraction of the first oil cylinder 5 through the first link, that is, when the interface A1 and the interface B1 work, the forward and reverse rotation of the motor is controlled through the second link, that is, when the interface A2 and the interface B2 work, the extension and retraction of the second oil cylinder 8 is controlled through the third link, that is, when the interface A3 and the interface B3 work. Specifically, the P port on the hydraulic control valve 1 is the pressure oil port, and the T port is the return oil port. When the first link of the hydraulic control valve 1 is operated, the interface A1 outputs oil, and the large cavity of the first oil cylinder 5 enters oil, and the small cavity returns oil through the interface B1, so that the left first oil cylinder 5 is extended; when the second link valve is controlled, the interface A2 enters oil, and the interface B2 returns oil, the motor 2 rotates forward, the interface B2 enters oil, and the interface A2 returns oil, and the motor 2 reverses. When the third link valve is controlled, the interface A3 outputs oil, and the large cavity of the left oil cylinder enters oil, and the small cavity returns oil through the interface B3, so that the first oil cylinder 5 is extended.
[0026] The specific principle of locking the cylinder when the hydraulic motor 2 moves is as follows: the hydraulic oil entering from the P port passes through the control valve 1. When the second valve is actuated, the oil is discharged from the interface A2 and returned from the interface B2. The hydraulic oil from the interface A2 drives the motor forward through the interface A of the motor 2. After the oil is discharged from the interface B, it returns to the control valve through the interface B2. At the same time, the pressure oil from the interface A2 enters the shuttle valve 3 through the interface MA, and enters the first cylinder 5 and the second cylinder 8 rod chamber through the check valve 4, so that the cylinder is in a retracted state. When the second valve is actuated, the oil is discharged from the interface B2 and returned from the interface A2. The hydraulic oil from the interface B2 drives the hydraulic motor 2 to reverse through the interface B of the hydraulic motor 2. After the oil is discharged from the interface A, it returns to the hydraulic control valve 1 through the interface A2. At the same time, the pressure oil at the interface B2 enters the shuttle valve 3 through the interface MB, and enters the first cylinder 5 and the second cylinder 8 rod chamber through the check valve 4, so that the cylinder is in a retracted state.
[0027] When the hydraulic control valve 1 is actuated, the interface A1 will discharge oil, the interface B1 will return oil, the hydraulic oil of interface A1 will enter the rodless chamber of the left first oil cylinder interface 5, and the oil in the rod chamber will return to interface B1. When the hydraulic oil at interface A1 enters the rodless chamber of the first oil cylinder 5, the hydraulic oil will pass through the ZW port at the same time. Since the throttle hole of the first throttle valve 6 is small, the oil will not be lost in large quantities, so the first throttle valve 6 has no effect on the lifting of the first oil cylinder 5. Similarly, the second throttle valve 7 has no effect on the lifting of the second oil cylinder 8. If the hydraulic control valve 1 causes internal leakage of the valve core after long-term use, when the internal leakage oil enters the first oil cylinder 5 and the second oil cylinder 8 through A1 or A3, the oil will return to the oil tank through the first throttle valve 6 or the second throttle valve 7 to avoid the accumulation of internal leakage oil and cause the first oil cylinder 5 or the second oil cylinder 8 to extend uncontrolled, causing a safety accident.
[0028] When the control valve 1 is actuated to cause oil to flow out of the interface B1 or the interface B3, the oil in the rod chamber flowing to the first cylinder 5 or the second cylinder 8 will enter the valve through ZY or YY. Since the one-way valve 4 can only flow in one direction, the oil cannot flow to the shuttle valve 3 connected to the hydraulic motor 2. Since ZY and YY are connected, no matter which cylinder retracts, it will cause the other cylinder to retract, thereby improving safety.
[0029] The above description is only a preferred embodiment of the utility model, and is not intended to limit the scope of implementation of the utility model. That is, all equivalent changes and modifications made according to the content of the patent application scope of the utility model should belong to the technical scope of the utility model.
Claims
1. A hydraulic motor locking cylinder hydraulic circuit, characterized in that: It includes a hydraulic control valve, a hydraulic motor, a first oil cylinder and a second oil cylinder, wherein the hydraulic control valve is provided with an interface A1 and an interface B1, wherein the interface A1 is communicated with a rodless cavity of the first oil cylinder, and the interface B1 is communicated with a rod cavity of the first oil cylinder; The hydraulic control valve is provided with an interface A2 and an interface B2, wherein the interface A2 is communicated with the interface A on the hydraulic motor, and the interface B2 is communicated with the interface B on the hydraulic motor; The hydraulic control valve is provided with an interface A3 and an interface B3, wherein the interface A3 is communicated with the rod chamber of the second oil cylinder, and the interface B3 is communicated with the rodless chamber of the second oil cylinder; The rod chamber of the first oil cylinder and the rod chamber of the second oil cylinder are connected through a first pipeline, and the A port and the B port of the hydraulic motor are connected through a second pipeline. A one-way valve is provided between the first pipeline and the second pipeline, and the one-way valve is connected to the first pipeline and the second pipeline respectively.
2. A hydraulic motor locking cylinder hydraulic circuit according to claim 1, characterized in that: A shuttle valve is provided on the second pipeline. An interface MA and an interface MB are provided on the shuttle valve. The interface MA is communicated with the interface A, the interface MB is communicated with the interface B, and the shuttle valve is communicated with the one-way valve.
3. A hydraulic motor locking cylinder hydraulic circuit according to claim 2, characterized in that: The shuttle valve is communicated with the oil inlet hole of the one-way valve.
4. A hydraulic motor locking cylinder hydraulic circuit according to claim 1, characterized in that: The rodless chamber of the first oil cylinder and the rodless chamber of the second oil cylinder are communicated with each other through a third pipeline.
5. A hydraulic motor locking cylinder hydraulic circuit according to claim 4, characterized in that: The third pipeline is installed with a first throttle valve and a second throttle valve, the first throttle valve is communicated with the rodless chamber of the first oil cylinder, and the second throttle valve is communicated with the rodless chamber of the second oil cylinder.