Hydraulic oil cylinder integrated with bidirectional hydraulic lock

Abstract

The utility model provides a hydraulic oil cylinder integrated with a bidirectional hydraulic lock, which comprises a cylinder body, a rodless cavity and a rod cavity are arranged in the cylinder body, and oil in the rodless cavity and the rod cavity is arranged to be suitable for being discharged and injected so as to control the hydraulic oil cylinder to extend and retract. A control oil way, a first hydraulic control one-way valve with a control port and a second hydraulic control one-way valve with a control port are integrated at the bottom of the cylinder body, a first oil port and a second oil port are formed in the bottom face of the cylinder body, and the first hydraulic control one-way valve and the second hydraulic control one-way valve are arranged to be suitable for being opened when oil enters the corresponding control ports. According to the hydraulic oil cylinder integrated with the bidirectional hydraulic lock, the control oil way and the hydraulic control one-way valve are integrated in the cylinder body, so that external pipelines are eliminated, the leakage risk is reduced, the system reliability is improved, the structure is compact, the installation space is saved, and the hydraulic oil cylinder is suitable for narrow working conditions.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder manufacturing technology, and in particular to a hydraulic cylinder with an integrated bidirectional hydraulic lock suitable for engineering machinery, lifting and transportation equipment, metallurgical equipment and other scenarios requiring high-reliability locking. Background Technology

[0002] A hydraulic cylinder is an actuator in a hydraulic transmission system. It is an energy conversion device that converts hydraulic energy into mechanical energy. Hydraulic cylinders achieve reciprocating motion. The locking function of traditional hydraulic cylinders is usually achieved through an external hydraulic lock, that is, by installing a hydraulically controlled check valve group (two-way hydraulic lock) outside the cylinder through a pipeline.

[0003] However, the existing hydraulic cylinders mentioned above have the following problems during use:

[0004] The piping and valve assembly are located outside the cylinder body, which increases the risk of leakage and reduces the reliability of the system. In addition, the dispersed structure of the piping and valve assembly results in a large space occupation and complicated installation and maintenance. At the same time, the control oil circuit is located outside the cylinder body, resulting in a long control oil circuit, which in turn leads to slow response speed and insufficient locking accuracy.

[0005] Therefore, in order to solve the above problems, this utility model proposes a hydraulic cylinder with an integrated bidirectional hydraulic lock that can reduce leakage risk, improve system reliability, and has a compact structure, saves installation space, and is suitable for confined working conditions. Utility Model Content

[0006] To address the problems existing in the current hydraulic cylinders, this utility model provides a hydraulic cylinder with an integrated bidirectional hydraulic lock.

[0007] According to one objective of this utility model, this utility model provides a hydraulic cylinder with an integrated bidirectional hydraulic lock, including a cylinder body. The cylinder body is provided with a rodless chamber and a rod chamber. The oil in the rodless chamber and the rod chamber is configured to be discharged and injected to control the extension and retraction of the hydraulic cylinder. The bottom of the cylinder body integrates a control oil circuit, a first hydraulic control check valve with a control port, and a second hydraulic control check valve with a control port. The bottom surface of the cylinder body has a first oil port and a second oil port. The first hydraulic control check valve and the second hydraulic control check valve are configured to open when oil enters the corresponding control port, and the first hydraulic control check valve and the second hydraulic control check valve are configured to close when oil intake stops.

[0008] The first oil port is connected to the rodless chamber through the first hydraulic check valve, the first oil port is connected to the control port of the second hydraulic check valve through the control oil circuit, the second oil port is connected to the rod chamber through the second hydraulic check valve, and the second oil port is connected to the control port of the first hydraulic check valve through the control oil circuit.

[0009] Preferably, the cylinder body has internal boreholes to form control oil passages.

[0010] Preferably, both the first hydraulic check valve and the second hydraulic check valve are arranged along a direction perpendicular to the cylinder axis. The first hydraulic check valve and the second hydraulic check valve are symmetrically arranged on both sides of the cylinder axis and are parallel to each other. The control oil circuit is located between the first hydraulic check valve and the second hydraulic check valve.

[0011] Preferably, the control oil circuit includes a first oil circuit connecting the first oil port and the control port of the second hydraulic check valve, and a second oil circuit connecting the second oil port and the control port of the first hydraulic check valve, wherein the first oil circuit and the second oil circuit are arranged alternately in the radial direction of the cylinder body.

[0012] Preferably, the bottom surface of the cylinder body is further provided with a third oil port and a fourth oil port, which are process ports of the control oil circuit.

[0013] Preferably, the hydraulic cylinder further includes:

[0014] The cylinder comprises a piston rod, a guide sleeve, a piston, and a cylinder body. The piston rod is movably mounted in the cylinder body via the guide sleeve. A piston is provided at the end of the piston rod, and the piston divides the inner cavity of the cylinder body into a rodless cavity and a rod cavity.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This hydraulic cylinder with integrated bidirectional hydraulic lock integrates the control oil circuit and hydraulic control check valve inside the cylinder body to eliminate external pipelines, reduce the risk of leakage, improve system reliability, and has a compact structure that saves installation space, making it suitable for confined working conditions.

[0017] During operation, when oil enters through the first port, hydraulic oil flows through the first hydraulically controlled check valve to the rodless chamber, and through the control oil circuit to the control port of the second hydraulically controlled check valve, opening the check valve and allowing the oil in the rod chamber to be discharged. Similarly, when oil enters through the second port, hydraulic oil flows through the second hydraulically controlled check valve to the rod chamber, and through the control oil circuit to the control port of the first hydraulically controlled check valve, opening the check valve and allowing the oil in the rodless chamber to be discharged, thus extending and retracting the cylinder. When oil intake stops, the hydraulically controlled check valve automatically closes under the action of the spring, achieving bidirectional locking.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1This is a schematic diagram from one perspective of the integrated bidirectional hydraulic lock described in this utility model;

[0020] Figure 2 This is a schematic diagram from another perspective of the integrated bidirectional hydraulic lock described in this utility model;

[0021] Figure 3 This is a schematic diagram illustrating the working principle of the bidirectional hydraulic lock in the integrated bidirectional hydraulic lock described in this utility model. Detailed Implementation

[0022] The following description is intended to provide a detailed account of the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0023] Please see Figure 1-3 This utility model provides a technical solution: a hydraulic cylinder with an integrated bidirectional hydraulic lock, including a cylinder body 4. The cylinder body 4 is provided with a rodless chamber 101 and a rod chamber 102. The oil in the rodless chamber 101 and the rod chamber 102 is configured to be discharged and injected to control the extension and retraction of the hydraulic cylinder. The bottom of the cylinder body 4 is integrated with a control oil circuit, a first hydraulic control check valve 5 with a control port, and a second hydraulic control check valve 6 with a control port. Preferably, the control oil circuit is formed by drilling holes inside the cylinder body 4. The bottom surface of the cylinder body 4 is provided with a first oil port A and a second oil port B. The first hydraulic control check valve 5 and the second hydraulic control check valve 6 are configured to open when oil enters the corresponding control port, and the first hydraulic control check valve 5 and the second hydraulic control check valve 6 are configured to close when oil intake stops.

[0024] The first oil port A is connected to the rodless chamber 101 through the first hydraulic check valve 5, and the first oil port A is connected to the control port of the second hydraulic check valve 6 through the control oil circuit;

[0025] The second oil port B is connected to the rod chamber 102 through the second hydraulic check valve 6, and the second oil port B is connected to the control port of the first hydraulic check valve 5 through the control oil circuit.

[0026] This hydraulic cylinder integrates the control oil circuit and hydraulic check valve inside the cylinder body 4 to eliminate external pipelines, reduce the risk of leakage, improve system reliability, and has a compact structure that saves installation space, making it suitable for confined working conditions.

[0027] Two hydraulically controlled check valves are installed at the bottom of cylinder 4. A control oil circuit is formed by drilling inside cylinder 4, connecting the control chambers of the hydraulically controlled check valves corresponding to the first oil port A and the second oil port B. The first oil port A is the inlet of the rodless chamber 101, and the second oil port B is the inlet of the rod chamber 102. In use, when oil enters through the first oil port A, hydraulic oil flows through the first hydraulically controlled check valve 5 to the rodless chamber 101, and through the control oil circuit to the control port of the second hydraulically controlled check valve 6 to open the check valve, allowing the oil in the rod chamber 102 to be discharged. Similarly, when oil enters through the second oil port B, hydraulic oil flows through the second hydraulically controlled check valve 6 to the rod chamber 102, and through the control oil circuit to the control port of the first hydraulically controlled check valve 5 to open the check valve, allowing the oil in the rodless chamber 101 to be discharged, thus realizing the extension and retraction of the cylinder. When oil intake stops, the hydraulically controlled check valve automatically closes under the action of the spring, achieving bidirectional locking.

[0028] In this embodiment, see Figure 2 The first hydraulic check valve 5 and the second hydraulic check valve 6 are both arranged along a direction perpendicular to the axis of the cylinder 4. The first hydraulic check valve 5 and the second hydraulic check valve 6 are symmetrically arranged on both sides of the axis of the cylinder 4 and are parallel to each other. The control oil circuit is located between the first hydraulic check valve 5 and the second hydraulic check valve 6.

[0029] The control oil circuit includes a first oil circuit connecting the first oil port A and the control port of the second hydraulic check valve 6, and a second oil circuit connecting the second oil port B and the control port of the first hydraulic check valve 5. The first oil circuit and the second oil circuit are arranged alternately in the radial direction of the cylinder body 4.

[0030] The bottom surface of the cylinder 4 is also provided with a third oil port C and a fourth oil port D, which are the process ports of the control oil circuit.

[0031] The hydraulic cylinder also includes:

[0032] The cylinder comprises a piston rod 1, a guide sleeve 2, a piston 3, and a cylinder 4. The piston rod 1 is movably installed in the cylinder 4 through the guide sleeve 2. The piston 3 is provided at the end of the piston rod 1, and the piston 3 divides the inner cavity of the cylinder 4 into the rodless cavity 101 and the rod cavity 102.

[0033] This hydraulic cylinder with integrated bidirectional hydraulic lock eliminates external piping through integrated design, reducing leakage risk, improving system reliability, and features a compact structure that saves installation space, making it suitable for confined working conditions.

[0034] The embodiments described above are only used to illustrate the technical ideas and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The scope of patent application of this utility model should not be limited by these embodiments. That is, any equivalent changes or modifications made in accordance with the spirit disclosed in this utility model still fall within the patent scope of this utility model.

Claims

1. A hydraulic cylinder with an integrated bidirectional hydraulic lock, comprising a cylinder body (4), wherein the cylinder body (4) is provided with a rodless chamber (101) and a rod chamber (102), wherein the oil in the rodless chamber (101) and the rod chamber (102) is configured to discharge and inject oil to control the extension and retraction of the hydraulic cylinder, characterized in that, The bottom of the cylinder body (4) is integrated with a control oil circuit, a first hydraulic control check valve (5) with a control port and a second hydraulic control check valve (6) with a control port. The bottom surface of the cylinder body (4) is provided with a first oil port (A) and a second oil port (B). The first hydraulic control check valve (5) and the second hydraulic control check valve (6) are configured to open when oil enters the corresponding control port, and the first hydraulic control check valve (5) and the second hydraulic control check valve (6) are configured to close when oil intake stops. The first oil port (A) is connected to the rodless chamber (101) through the first hydraulic check valve (5), and the first oil port (A) is connected to the control port of the second hydraulic check valve (6) through the control oil circuit. The second oil port (B) is connected to the rod chamber (102) through the second hydraulic check valve (6), and the second oil port (B) is connected to the control port of the first hydraulic check valve (5) through the control oil circuit.

2. A hydraulic cylinder integrating a bidirectional hydraulic lock according to claim 1, characterized in that, The control oil circuit is formed by drilling holes inside the cylinder (4).

3. A hydraulic cylinder integrating a bidirectional hydraulic lock according to claim 1, characterized in that, The first hydraulic check valve (5) and the second hydraulic check valve (6) are both arranged along a direction perpendicular to the axis of the cylinder (4). The first hydraulic check valve (5) and the second hydraulic check valve (6) are symmetrically arranged on both sides of the axis of the cylinder (4) and are parallel to each other. The control oil circuit is located between the first hydraulic check valve (5) and the second hydraulic check valve (6).

4. A hydraulic cylinder integrating a bidirectional hydraulic lock according to claim 1, characterized in that, The control oil circuit includes a first oil circuit connecting the first oil port (A) and the control port of the second hydraulic check valve (6), and a second oil circuit connecting the second oil port (B) and the control port of the first hydraulic check valve (5). The first oil circuit and the second oil circuit are arranged alternately in the radial direction of the cylinder body (4).

5. A hydraulic cylinder integrating a bidirectional hydraulic lock according to claim 1, characterized in that, The bottom surface of the cylinder (4) is also provided with a third oil port (C) and a fourth oil port (D), which are the process ports of the control oil circuit.

6. A hydraulic cylinder integrating a bidirectional hydraulic lock according to claim 1, characterized in that, The hydraulic cylinder also includes: The piston rod (1), guide sleeve (2), piston (3) and cylinder (4) are provided. The piston rod (1) is movably installed in the cylinder (4) through the guide sleeve (2). The piston (3) is provided at the end of the piston rod (1). The piston (3) divides the inner cavity of the cylinder (4) into the rodless cavity (101) and the rod cavity (102).

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