Oil cylinder with self-locking function

Abstract

The utility model discloses an oil cylinder with a self-locking function, which belongs to the technical field of oil cylinders, and comprises a cylinder barrel, a first oil port pipe is fixedly mounted at one end of the cylinder barrel, a second oil port pipe is fixedly mounted at the other end of the cylinder barrel, a piston mechanism is arranged in the cylinder barrel, and the piston mechanism is connected with the first oil port pipe and the second oil port pipe. Locking mechanisms are arranged in the piston mechanism, and a control mechanism is arranged between the locking mechanisms. Through the arrangement of the piston mechanism and the locking mechanism, the piston head can be fixed, the piston rod is prevented from moving under the action of failure of the oil cylinder or other external factors, the reliability is very high, the piston rod can be kept stable under various complex working conditions, and even when the piston rod is subjected to large external impact force or vibration, the piston rod can be prevented from moving. The piston head can be ensured not to move, so that the operation precision and stability of equipment are improved, and the locking mechanism can be accurately controlled to be opened and closed through the control mechanism.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a hydraulic cylinder with a self-locking function. Background Technology

[0002] Hydraulic cylinders are energy conversion devices that convert hydraulic energy into mechanical energy for reciprocating linear motion. They eliminate the need for speed reduction devices and have no transmission gaps, resulting in smooth movement. This makes them widely used in the hydraulic systems of various machines. Hydraulic cylinder self-locking is divided into hydraulic self-locking and mechanical self-locking.

[0003] Existing hydraulic cylinders typically use hydraulic locking to achieve self-locking functionality when the machine is stopped but power is not interrupted. This method mainly involves installing hydraulically controlled check valves or shut-off valves on the inlet and outlet oil lines of the cylinder. When it is necessary to stop the movement of the cylinder rod, the corresponding valve is closed, which seals the oil in the cylinder and maintains the position of the cylinder rod. However, hydraulic locking has the risk of leakage, and relying on hydraulic locking for a long time may cause the cylinder rod to slowly return to its original position, which cannot meet the requirements of high precision and high safety.

[0004] Therefore, there is an urgent need to provide a hydraulic cylinder with a self-locking function to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a hydraulic cylinder with a self-locking function.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: providing a hydraulic cylinder with a self-locking function, including a cylinder barrel, a first oil port pipe fixedly installed at one end of the cylinder barrel, a second oil port pipe fixedly installed at the other end of the cylinder barrel, a piston mechanism provided inside the cylinder barrel, a locking mechanism provided inside the piston mechanism, and a control mechanism provided between the locking mechanisms.

[0007] Through the above technical solution, the first oil port pipe and the second oil port pipe at both ends of the cylinder are used to connect hydraulic oil, so as to realize the oil inlet and oil return functions of the oil cylinder.

[0008] The present invention is further configured such that: the piston mechanism includes a piston rod sealed and installed on the inner wall of the cylinder, an end cap is fixed to one side of the cylinder by bolt threads, a piston head is fixed to the outside of the piston rod by nut threads, and a fixing groove is provided on the outside of the piston head.

[0009] Through the above technical solution, the piston head can slide up and down inside the cylinder, pushing the piston rod to move linearly, thereby driving the working parts connected to it to move.

[0010] The present invention is further configured such that: a first mounting cylinder is fixedly installed at one end of the cylinder barrel, and a second mounting cylinder is fixedly installed at the other end of the cylinder barrel.

[0011] Through the above technical solution, the first mounting cylinder and the second mounting cylinder provide conditions for the installation of the locking mechanism, thereby fixing the piston head at different positions.

[0012] The present invention is further configured such that: the locking mechanism includes a cylindrical spring fitted inside the first mounting cylinder, a piston block is fixedly installed at the top of the cylindrical spring, and the outer surface of the piston block is sealed to the inner wall of the first mounting cylinder by a rubber ring.

[0013] Through the above technical solution, the cylindrical spring causes the piston block to fit against the first mounting cylinder side.

[0014] The present invention is further configured such that: a rod with one end penetrating through and extending into the fixed groove is fixedly installed at the bottom end of the piston block, and an elbow pipe is installed in the internal thread of the first mounting cylinder.

[0015] Through the above technical solution, the insertion rod cooperates with the fixing groove on the piston head to achieve mechanical locking of the piston head.

[0016] The present invention is further configured such that: the control mechanism includes a threaded adapter pipe threadedly installed inside the elbow pipe, an overflow valve block is provided on one side of the cylinder, and threaded connecting pipes are fixedly installed on both sides of the overflow valve block.

[0017] Through the above technical solution, external hydraulic oil can enter the first mounting cylinder through the threaded adapter tube, driving the relevant components to move, and the overflow valve block prevents hydraulic oil leakage.

[0018] The present invention is further configured such that: a sealing ring is fitted inside both the threaded adapter tube and the threaded connecting tube; a connecting hose is tightly fitted between the threaded adapter tube and the threaded connecting tube; threaded sleeves are fitted at both ends of the connecting hose; and the outside of the threaded adapter tube and the threaded connecting tube are respectively threadedly connected to the inside of the two threaded sleeves.

[0019] Through the above technical solution, the threaded connecting pipe of the overflow valve block is connected to the threaded adapter pipe through the connecting hose. The two ends of the connecting hose are sealed by the sealing ring. The two ends of the connecting hose are threadedly fixed to the threaded adapter pipe and the threaded connecting pipe respectively through the threaded sleeve, which prevents hydraulic oil leakage and facilitates installation and maintenance.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. This utility model, by providing a piston mechanism and a locking mechanism, can fix the piston head and prevent the piston rod from moving under the action of cylinder failure or other external factors. It has high reliability and can keep the piston rod stable under various complex working conditions. Even when subjected to large external impact force or vibration, it can ensure that the piston head will not shift, thereby improving the operating accuracy and stability of the equipment.

[0022] 2. This utility model, by providing a control mechanism, can accurately control the opening and closing time of the locking mechanism according to different working conditions and needs, thereby improving the operability and user-friendliness of the equipment. The operation is relatively simple and will not affect the normal movement of the cylinder rod, allowing operators to use the equipment with greater peace of mind. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a structural diagram of the piston mechanism of this utility model;

[0025] Figure 3 This is an exploded view of the locking mechanism of this utility model;

[0026] Figure 4 This is an exploded view of the control mechanism of this utility model.

[0027] In the diagram: 1. Cylinder; 2. First oil port pipe; 3. Second oil port pipe; 4. Piston mechanism; 401. Piston rod; 402. End cap; 403. Piston head; 404. Fixing groove; 405. First mounting cylinder; 406. Second mounting cylinder; 5. Locking mechanism; 501. Cylindrical spring; 502. Piston block; 503. Insert rod; 504. Elbow pipe; 6. Control mechanism; 601. Threaded adapter pipe; 602. Overflow valve block; 603. Threaded connecting pipe; 604. Sealing ring; 605. Connecting hose; 606. Threaded sleeve. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0029] Please see Figures 1-4A self-locking hydraulic cylinder includes a cylinder barrel 1. A first oil port pipe 2 is fixedly installed at one end of the cylinder barrel 1, and a second oil port pipe 3 is fixedly installed at the other end of the cylinder barrel 1. A piston mechanism 4 is provided inside the cylinder barrel 1. The piston mechanism 4 includes a piston rod 401 sealed and installed on the inner wall of the cylinder barrel 1. An end cap 402 is fixed to one side of the cylinder barrel 1 by bolt threads. A piston head 403 is fixed to the outside of the piston rod 401 by nut threads. A fixing groove 404 is opened on the outside of the piston head 403. A first mounting cylinder is fixedly installed at one end of the cylinder barrel 1. 405. A second mounting cylinder 406 is fixedly installed at the other end of the cylinder 1. The first oil port pipe 2 and the second oil port pipe 3 at both ends of the cylinder 1 are used to connect hydraulic oil to realize the oil inlet and return functions of the cylinder, transmit the pressure of the hydraulic oil, so that the piston head 403 can slide up and down in the cylinder 1, push the piston rod 401 to move linearly, thereby driving the working parts connected to it to move. The first mounting cylinder 405 and the second mounting cylinder 406 provide conditions for the installation of the locking mechanism 5, thereby fixing the piston head 403 at different positions.

[0030] like Figure 3 As shown, the piston mechanism 4 is internally equipped with a locking mechanism 5. The locking mechanism 5 includes a cylindrical spring 501 fitted inside the first mounting cylinder 405. A piston block 502 is fixedly mounted on the top of the cylindrical spring 501. The outer surface of the piston block 502 is sealed to the inner wall of the first mounting cylinder 405 by a rubber ring. A rod 503 with one end penetrating through and extending into the fixing groove 404 is fixedly mounted on the bottom end of the piston block 502. An elbow tube 504 is threaded inside the first mounting cylinder 405. The cylindrical spring 501 causes the piston block 502 to fit against one side of the first mounting cylinder 405, causing the rod 503 to retract into the first mounting cylinder 405. The rod 503 can cooperate with the fixing groove 404 on the piston head 403 to achieve mechanical locking of the piston head 403.

[0031] like Figure 4As shown, a control mechanism 6 is provided between the locking mechanisms 5. The control mechanism 6 includes a threaded adapter tube 601 threaded inside the elbow tube 504. An overflow valve block 602 is provided on one side of the cylinder 1. Threaded connecting tubes 603 are fixedly installed on both sides of the overflow valve block 602. Sealing rings 604 are fitted inside both the threaded adapter tube 601 and the threaded connecting tube 603. A connecting hose 605 is tightly fitted between the threaded adapter tube 601 and the threaded connecting tube 603. Threaded sleeves 606 are sleeved at both ends of the connecting hose 605. The outside of the threaded adapter tube 601 and the threaded connecting tube 603 are respectively connected to the two threaded sleeves. The internal threaded connection of 606 allows the threaded connecting pipe 603 of the overflow valve block 602 to be connected to the threaded adapter pipe 601 via the connecting hose 605. Both ends of the connecting hose 605 are sealed by the sealing ring 604. Both ends of the connecting hose 605 are threadedly fixed to the threaded adapter pipe 601 and the threaded connecting pipe 603 via the threaded sleeve 606, respectively, to prevent hydraulic oil leakage and facilitate installation and maintenance. External hydraulic oil enters the threaded adapter pipe 601 through the overflow valve block 602 and the connecting hose 605, and then enters the first mounting cylinder 405 to drive the relevant components. The overflow valve block 602 prevents hydraulic oil leakage.

[0032] In use, the first oil port pipe 2 and the second oil port pipe 3 at both ends of the cylinder 1 are used to connect hydraulic oil, realizing the oil inlet and return functions of the cylinder, transmitting the pressure of the hydraulic oil, so that the piston head 403 can slide up and down in the cylinder 1, pushing the piston rod 401 to move linearly, thereby driving the working parts connected to it to move. When the piston head 403 is fixed, the external hydraulic oil enters the threaded adapter pipe 601 through the overflow valve block 602 and the connecting hose 605, and then enters the first mounting cylinder 405, driving the piston block 502 to move to one side of the cylinder 1, so that the insertion rod 503 cooperates with the fixing groove 404 on the piston head 403 to achieve mechanical locking of the piston head 403. The pressure of the overflow valve block 602 is greater than the pressure of the column spring 501, so that when the external hydraulic oil is no longer supplied, the piston block 502 will not retract.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A hydraulic cylinder with a self-locking function, comprising a cylinder barrel (1), characterized in that: A first oil port pipe (2) is fixedly installed at one end of the cylinder (1), and a second oil port pipe (3) is fixedly installed at the other end of the cylinder (1). The cylinder (1) is provided with a piston mechanism (4), the piston mechanism (4) is provided with a locking mechanism (5), and the locking mechanisms (5) are provided with a control mechanism (6). The control mechanism (6) includes a threaded adapter pipe (601) threaded inside the elbow pipe (504), an overflow valve block (602) is provided on one side of the cylinder (1), and threaded connecting pipes (603) are fixedly installed on both sides of the overflow valve block (602). A sealing ring (604) is fitted inside both the threaded adapter pipe (601) and the threaded connecting pipe (603). A connecting hose (605) is tightly fitted between the threaded adapter pipe (601) and the threaded connecting pipe (603). Threaded sleeves (606) are sleeved at both ends of the connecting hose (605). The outside of the threaded adapter pipe (601) and the threaded connecting pipe (603) are respectively threaded to the inside of the two threaded sleeves (606).

2. A hydraulic cylinder with a self-locking function according to claim 1, characterized in that: The piston mechanism (4) includes a piston rod (401) sealed and installed on the inner wall of the cylinder (1). An end cap (402) is fixed to one side of the cylinder (1) by bolt threads. A piston head (403) is fixed to the outside of the piston rod (401) by nut threads. A fixing groove (404) is provided on the outside of the piston head (403).

3. A hydraulic cylinder with a self-locking function according to claim 2, characterized in that: A first mounting sleeve (405) is fixedly installed at one end of the cylinder (1), and a second mounting sleeve (406) is fixedly installed at the other end of the cylinder (1).

4. A hydraulic cylinder with a self-locking function according to claim 3, characterized in that: The locking mechanism (5) includes a cylindrical spring (501) fitted inside the first mounting cylinder (405), and a piston block (502) is fixedly installed on the top of the cylindrical spring (501). The outer surface of the piston block (502) is sealed to the inner wall of the first mounting cylinder (405) by a rubber ring.

5. A hydraulic cylinder with a self-locking function according to claim 4, characterized in that: The piston block (502) has a rod (503) fixedly installed at the bottom end, which extends through and into the fixed groove (404), and the first mounting cylinder (405) has an elbow pipe (504) installed inside the thread.

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