Hydraulic cylinder locking mechanism

Abstract

The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to a hydraulic cylinder locking mechanism which comprises a cylinder body and a locking mechanism, a bottom cover is arranged at one end of the cylinder body, an end cover is arranged at the other end of the cylinder body, a connecting rod is arranged between the bottom cover and the end cover, an oil inlet is formed in the end cover, an oil return opening is formed in the bottom cover, and a piston rod is arranged in the cylinder body. A locking mechanism is arranged on the outer side of the end cover, a flow dividing pipe is arranged on the outer side of the locking mechanism, an oil conveying pipe is arranged on the flow dividing pipe, and the locking mechanism comprises a piston plate, a limiting plate, a spring and a control oil cavity. Through the piston rod, the limiting groove, the locking mechanism, the piston plate, the limiting plate, the spring, the control oil cavity, the flow dividing pipe and the oil conveying pipe, when a hydraulic system breaks down, the piston rod can stably keep the position, a load is prevented from moving accidentally, manual operation is not needed, the self-locking effect is achieved, use is more convenient, the cylinder body structure cannot be affected, and the service life is prolonged. The structure stability of the cylinder body is guaranteed, the structure is simple, and the difficulty in the actual production process is small.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a hydraulic cylinder locking mechanism. Background Technology

[0002] A hydraulic cylinder is an actuator in a hydraulic system. Its core function is to convert hydraulic energy (provided by pressurized oil) into mechanical energy for linear reciprocating motion. It drives an internal piston or plunger to move through the pressure of hydraulic oil, thereby outputting thrust or pull force. It is widely used in engineering machinery, industrial equipment, aerospace and other fields.

[0003] The existing technology has the following shortcomings: Application No. 202310799239.9 proposes a hydraulic cylinder locking mechanism, the key technical points of which are: it includes a cylinder body, the cylinder body has a telescopic cavity inside, the cylinder body surface has a through hole communicating with the telescopic cavity, a piston plate is slidably installed in the telescopic cavity, a piston rod is fixedly installed on the piston plate surface, extending through the through hole to the outside of the cylinder body, the piston rod surface has multiple sets of locking grooves, and the cylinder body surface is provided with a locking mechanism that cooperates with the piston rod. The locking mechanism includes a first self-locking component, a second self-locking component, and a control component. The control component includes an unlocking part and an automatic locking part, which can lock the piston rod in one direction while the piston rod moves, preventing the piston rod from being directly retracted into the cylinder cavity under pressure when the cylinder body malfunctions.

[0004] The above-mentioned equipment requires manual pressing of the control ring during use, which can be further improved in terms of ease of operation. It cannot achieve the effect of self-locking. At the same time, the locking mechanism adopts a lot of slotting settings such as fixed slots, locking slots, and positioning slots, and corresponding components are set inside. Too many slotting settings will damage the structure of the cylinder itself. The components set inside the slots are small in size, which will increase the production difficulty in actual production. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a hydraulic cylinder locking mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder locking mechanism, comprising a cylinder body and a locking mechanism, wherein a bottom cover is provided at one end of the cylinder body, and an end cover is provided at the other end of the cylinder body, a connecting rod is provided between the bottom cover and the end cover, an oil inlet is provided on the end cover, an oil return outlet is provided on the bottom cover, a piston rod is provided inside the cylinder body, a locking mechanism is provided outside the end cover, a flow divider is provided outside the locking mechanism, an oil supply pipe is provided on the flow divider, a piston is provided on the piston rod, a first oil chamber and a second oil chamber are provided inside the cylinder body, and a limiting groove is provided outside the piston rod;

[0007] The locking mechanism includes a piston plate, a limiting plate, a spring, and a control oil chamber. The locking mechanism contains a piston plate, a limiting plate is provided at the bottom of the piston plate, and a spring is provided at the top of the piston plate.

[0008] As a preferred technical solution of this utility model: the bottom cover and the end cover are respectively fixedly installed at both ends of the cylinder body, the two ends of the connecting rod pass through the bottom cover and the end cover, and both ends of the connecting rod are provided with locking nuts.

[0009] As a preferred technical solution of this utility model: the piston is fixedly installed at one end of the piston rod and is located in the cylinder body, the piston divides the cylinder body into a first oil chamber and a second oil chamber, and one end of the piston rod extends outward through the end cap.

[0010] As a preferred technical solution of this utility model: the oil inlet is connected to the first oil chamber, the oil return port is connected to the second oil chamber, and the locking mechanism is fixedly installed on the outside of the end cover.

[0011] As a preferred technical solution of this utility model: a control oil cavity is formed between the piston plate and the locking mechanism, and the piston plate is tightly fitted with the inner wall of the locking mechanism.

[0012] As a preferred technical solution of this utility model: there are two sets of springs, one end of the spring is fixedly connected to the top of the piston plate, and the other end of the spring is fixedly connected to the top of the inner wall of the locking mechanism.

[0013] As a preferred technical solution of this utility model: the limiting plate is fixedly installed at the bottom of the piston plate and extends out of the locking mechanism. The limiting plate is adapted to the limiting groove. There are four sets of locking mechanisms with the same structure. The diversion pipe is fixedly installed on the outside of the four sets of locking mechanisms. The diversion pipe is connected to the control oil chamber in the four sets of locking mechanisms. The oil supply pipe is connected to the diversion pipe.

[0014] Compared with the prior art, the present invention provides a hydraulic cylinder locking mechanism, which has the following advantages:

[0015] 1. This hydraulic cylinder locking mechanism comprises a piston rod, a limiting groove, a locking mechanism, a piston plate, a limiting plate, a spring, a control oil chamber, a diverter pipe, and an oil supply pipe. Oil enters the control oil chamber through the diverter pipe, lifting the piston plate. The limiting plate moves away from the piston rod, no longer restricting its position, ensuring free extension and retraction of the piston rod. In the event of a hydraulic system malfunction, such as a loss of pressure or power failure, oil will no longer be supplied to the inlet, outlet, or oil supply pipe. The oil in the control oil chamber loses pressure, and the spring applies pressure to the piston plate, causing it to descend and extend into the limiting groove to restrict the piston rod's position. This ensures the piston rod remains stably in place, preventing accidental load movement and achieving a self-locking effect.

[0016] 2. This hydraulic cylinder locking mechanism, by setting up a locking mechanism, a diverter pipe, and an oil supply pipe, prevents oil from being supplied to the inlet, outlet, and oil supply pipe when the hydraulic system fails. This controls the oil in the control chamber to lose pressure, and the spring pushes the piston plate down to extend into the limiting groove to limit the position of the piston rod. No manual operation is required, making it more convenient to use. At the same time, it does not affect the structure of the cylinder body, ensuring the structural stability of the cylinder body. The structure is simple and less difficult to implement in actual production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall external appearance of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the cylinder body of this utility model;

[0019] Figure 3 This is a schematic diagram of the limiting groove of this utility model;

[0020] Figure 4 This is a schematic diagram of the locking mechanism of this utility model.

[0021] In the diagram: 1. Cylinder block; 2. Bottom cover; 3. End cover; 4. Connecting rod; 5. Oil inlet; 6. Oil return port; 7. Piston rod; 8. Locking mechanism; 801. Piston plate; 802. Limiting plate; 803. Spring; 804. Control oil chamber; 9. Diverter pipe; 10. Oil supply pipe; 11. Piston; 12. First oil chamber; 13. Second oil chamber; 14. Limiting groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0023] Please see Figure 1-4 In this embodiment: a hydraulic cylinder locking mechanism includes a cylinder body 1 and a locking mechanism 8. A bottom cover 2 is provided at one end of the cylinder body 1, and an end cover 3 is provided at the other end of the cylinder body 1. A connecting rod 4 is provided between the bottom cover 2 and the end cover 3. An oil inlet 5 is provided on the end cover 3, and an oil return port 6 is provided on the bottom cover 2. A piston rod 7 is provided inside the cylinder body 1. A locking mechanism 8 is provided outside the end cover 3. A diversion pipe 9 is provided outside the locking mechanism 8. An oil delivery pipe 10 is provided on the diversion pipe 9. A piston 11 is provided on the piston rod 7. A first oil chamber 12 and a second oil chamber 13 are provided inside the cylinder body 1. A limiting groove 14 is provided outside the piston rod 7.

[0024] The oil volume in the first oil chamber 12 and the second oil chamber 13 can be easily adjusted through the oil inlet 5 and the oil outlet 6, so as to control the extension and retraction of the piston rod 7. The oil can be easily fed into the diversion pipe 9 through the oil supply pipe 10.

[0025] The locking mechanism 8 includes a piston plate 801, a limiting plate 802, a spring 803, and a control oil chamber 804. The locking mechanism 8 is provided with a piston plate 801, a limiting plate 802 is provided at the bottom of the piston plate 801, and a spring 803 is provided at the top of the piston plate 801.

[0026] The oil can be evenly fed into the control oil chamber 804 through the diversion pipe 9.

[0027] In this embodiment, the bottom cover 2 and the end cover 3 are fixedly installed at both ends of the cylinder body 1, the two ends of the connecting rod 4 pass through the bottom cover 2 and the end cover 3, and both ends of the connecting rod 4 are provided with locking nuts. The piston 11 is fixedly installed at one end of the piston rod 7 and is located inside the cylinder body 1. The piston 11 divides the inside of the cylinder body 1 into a first oil chamber 12 and a second oil chamber 13. One end of the piston rod 7 passes through the end cover 3 and extends outward. The oil inlet 5 communicates with the first oil chamber 12, and the oil return port 6 communicates with the second oil chamber 13. The locking mechanism 8 is fixedly installed on the outside of the end cover 3.

[0028] Specifically, the stability of the bottom cover 2 and the end cover 3 can be ensured by the connecting rod 4.

[0029] In this embodiment, a control oil chamber 804 is formed between the piston plate 801 and the locking mechanism 8. The piston plate 801 and the inner wall of the locking mechanism 8 are tightly fitted together. There are two sets of springs 803. One end of the spring 803 is fixedly connected to the top of the piston plate 801, and the other end of the spring 803 is fixedly connected to the top of the inner wall of the locking mechanism 8. The limiting plate 802 is fixedly installed at the bottom of the piston plate 801 and extends out of the locking mechanism 8. The limiting plate 802 is adapted to the limiting groove 14. There are four sets of locking mechanisms 8 with the same structure. The diversion pipe 9 is fixedly installed on the outside of the four sets of locking mechanisms 8. The diversion pipe 9 connects to the control oil chamber 804 in the four sets of locking mechanisms 8. The oil supply pipe 10 is connected to the diversion pipe 9.

[0030] Specifically, the spring 803 can cause the piston plate 801 and the limiting plate 802 to extend outward when the hydraulic system fails. The limiting groove 14 can be combined with the limiting plate 802 to facilitate limiting the position of the piston rod 7.

[0031] The working principle and usage process of this utility model are as follows: In actual use, the oil inlet 5, oil return 6, and oil supply pipe 10 are connected to the corresponding hydraulic oil circuits. Hydraulic oil enters the oil inlet 5 and the oil supply pipe 10 respectively. The oil in the oil supply pipe 10 continuously flows into the diversion pipe 9 and into the four sets of locking mechanisms 8 respectively. When the oil enters the control oil chamber 804, it can lift the piston plate 801. At the same time, the spring 803 is compressed, which simultaneously drives the limiting plate 802 away from the piston rod 7. At this time, the limiting plate 802 does not... The position of piston rod 7 is further restricted. At the same time, oil enters the first oil chamber 12 through the oil inlet 5 and pushes piston 11 to move into the second oil chamber 13. The oil in the second oil chamber 13 will return to the hydraulic circuit through the oil return port 6, which can cause piston rod 7 to retract. Conversely, oil is input from the oil return port 6 into the second oil chamber 13, which will push piston 11 to move into the first oil chamber 12. The oil in the first oil chamber 12 will return to the hydraulic circuit through the oil inlet 5, which can cause piston rod 7 to extend. The hydraulic cylinder can operate normally.

[0032] During the retraction and extension of the piston rod 7, the oil in the control oil chamber 804 continuously pushes the piston plate 801 upward, ensuring that the piston rod 7 can extend and retract freely. In the event of a hydraulic system failure, such as when the hydraulic system loses pressure or is powered off, the oil will no longer be supplied to the inlet 5, return 6, and oil supply pipe 10. The oil in the control oil chamber 804 loses pressure, and the spring 803 will apply pressure to the piston plate 801, causing the piston plate 801 to descend. At this time, the limiting plate 802 extends and enters the limiting groove 14, thereby limiting the position of the piston rod 7, so that the piston rod 7 can maintain a stable position, preventing the load from moving unexpectedly, achieving a self-locking effect. No manual operation is required, making it more convenient to use. At the same time, it will not affect the structure of the cylinder body 1, ensuring the structural stability of the cylinder body 1. The structure is simple and less difficult to produce in actual production.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A hydraulic cylinder locking mechanism, comprising a cylinder body (1), a locking mechanism (8), one end of the cylinder body (1) is provided with a bottom cover (2), the other end of the cylinder body (1) is provided with an end cover (3), a connecting rod (4) is arranged between the bottom cover (2) and the end cover (3), characterized in that: The oil inlet (5) is arranged on the end cover (3), the oil return port (6) is arranged on the bottom cover (2), the piston rod (7) is arranged in the cylinder body (1), the locking mechanism (8) is arranged outside the end cover (3), the shunt pipe (9) is arranged outside the locking mechanism (8), the oil pipe (10) is arranged on the shunt pipe (9), the piston (11) is arranged on the piston rod (7), the first oil cavity (12) and the second oil cavity (13) are arranged in the cylinder body (1), and the limiting groove (14) is arranged outside the piston rod (7). The locking mechanism (8) comprises a piston plate (801), a limiting plate (802), a spring (803) and a control oil cavity (804), the piston plate (801) is arranged in the locking mechanism (8), the limiting plate (802) is arranged at the bottom of the piston plate (801), and the spring (803) is arranged at the top of the piston plate (801).

2. A hydraulic cylinder locking mechanism according to claim 1, characterized in that: The bottom cover (2) and the end cover (3) are fixedly installed at both ends of the cylinder body (1), the connecting rod (4) penetrates through the bottom cover (2) and the end cover (3), and the connecting rod (4) is provided with a locking nut at both ends.

3. The hydraulic cylinder locking mechanism of claim 1, wherein: The piston (11) is fixedly installed at one end of the piston rod (7) and in the cylinder body (1), the piston (11) divides the cylinder body (1) into the first oil cavity (12) and the second oil cavity (13), and one end of the piston rod (7) penetrates through the end cover (3) and extends outward.

4. The hydraulic cylinder locking mechanism of claim 1, wherein: The oil inlet (5) is communicated with the first oil cavity (12), the oil return port (6) is communicated with the second oil cavity (13), and the locking mechanism (8) is fixedly installed outside the end cover (3).

5. The hydraulic cylinder locking mechanism of claim 1, wherein: The control oil cavity (804) is formed between the piston plate (801) and the locking mechanism (8), and the piston plate (801) is tightly attached to the inner wall of the locking mechanism (8).

6. A hydraulic cylinder locking mechanism according to claim 1, wherein: The spring (803) has two groups, one end of the spring (803) is fixedly connected to the top of the piston plate (801), and the other end of the spring (803) is fixedly connected to the inner wall top end of the locking mechanism (8).

7. A hydraulic cylinder locking mechanism according to claim 1, wherein: The limiting plate (802) is fixedly installed at the bottom of the piston plate (801) and extends out of the locking mechanism (8), the limiting plate (802) is matched with the limiting groove (14), the locking mechanism (8) has four groups and is consistent in structure, the shunt pipe (9) is fixedly installed outside the four groups of locking mechanisms (8), the shunt pipe (9) communicates the control oil cavities (804) in the four groups of locking mechanisms (8), and the oil pipe (10) is communicated with the shunt pipe (9).

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