Mechanical locking oil cylinder

Abstract

The utility model belongs to the technical field of oil cylinders, and particularly relates to a mechanical locking oil cylinder which comprises a cylinder body, a locking cavity is formed in the cylinder body, a locking mechanism is installed in the locking cavity, the locking mechanism comprises a matching round block, a matching rod is fixedly installed on the matching round block, a steel ball is installed on the matching rod in a sliding mode, and the steel ball is arranged on the matching rod. When hydraulic oil is introduced into the oil inlet pipe, the steel ball is propped open so as to enter the left side of the sliding cavity to prop out the piston rod, and when hydraulic oil is stopped from being introduced from the oil inlet pipe, under the action of the spring, the piston rod is locked by the locking piston. The steel ball is pressed against the second L-shaped cavity, so that the function of locking the piston rod is achieved, after hydraulic oil is introduced from the oil return pipe, the hydraulic oil presses the locking piston out of the matching cavity, so that the steel ball is pressed away, so that locking of the piston rod is unlocked, the design structure is simple, and the automatic locking function is achieved.

Description

Technical Field

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

[0002] A mechanical locking cylinder is a device that combines the functions of a mechanical locking mechanism and a hydraulic cylinder. It can achieve reliable mechanical locking at any position, ensuring that the load remains stable over a long period of time. Its core feature is that it achieves self-locking through mechanical structures (such as brake blocks, disc springs, steel balls, etc.), rather than relying solely on a hydraulic system, thereby overcoming the locking failure problems caused by leakage and pressure fluctuations in traditional hydraulic locks.

[0003] Chinese patent (authorization announcement number: CN 220667994 U, authorization announcement date: 2024.03.26) proposes a mechanical locking cylinder. By setting an outer sleeve and setting a threaded locking nut on the piston rod, the locking nut can be rotated after the cylinder extends, so that the locking nut contacts the end face of the outer sleeve, thereby locking the piston rod. The structure is simple, and mechanical locking is safer and more reliable than hydraulic locking. It can keep the position of the cylinder extension end unchanged for a long time, and is suitable for special occasions where the position of the cylinder is very strictly maintained.

[0004] However, the aforementioned hydraulic cylinder requires manual operation by turning the locking nut with a wrench to lock the piston rod. When the hydraulic cylinder is in some special positions, it is inconvenient for the staff to manually lock the cylinder, thus its practicality is low and it is inconvenient to use. In order to improve the practicality of the hydraulic cylinder and make it easier to use, we propose a mechanical locking hydraulic cylinder. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a mechanical locking cylinder. A locking mechanism is installed within the locking cavity of the cylinder body. When hydraulic oil is introduced through the inlet pipe, the steel ball is pushed open, allowing the hydraulic oil to enter the sliding cavity through the through hole on the mating block, thus pushing the piston rod out. When the hydraulic oil supply stops from the inlet pipe, the steel ball is pushed into the second L-shaped cavity by the spring, preventing backflow of hydraulic oil in the sliding cavity, thereby locking the piston rod. When hydraulic oil is introduced through the return pipe, the hydraulic oil pushes the locking piston out of the mating cavity, and the steel ball is pushed open by the mating bracket, thus releasing the piston rod from its lock. This design is simple in structure, achieves automatic locking, and solves the problems mentioned earlier.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A mechanical locking cylinder includes a cylinder body with a locking cavity, a sliding cavity, and a mating cavity. A piston rod is slidably mounted in the sliding cavity. A locking mechanism is installed in the locking cavity. The locking mechanism includes a mating block, which is fixedly mounted in the locking cavity. A mating rod is fixedly mounted on the mating block. A steel ball is slidably mounted on the mating rod. A mating hole is formed on the steel ball, which mates with the mating rod. A spring is fitted on the mating rod. A locking piston is slidably mounted in the mating cavity. A mating bracket is fixedly mounted at one end of the locking piston, and the mating bracket mates with the steel ball.

[0008] Preferably, an oil inlet pipe and an oil return pipe are fixedly installed on the cylinder body. A first L-shaped cavity and a second L-shaped cavity are formed in the cylinder body. The first L-shaped cavity is fixedly connected to the oil return pipe, and the second L-shaped cavity is fixedly connected to the oil inlet pipe. The other end of the first L-shaped cavity is fixedly connected to the mating cavity, and the other end of the second L-shaped cavity is fixedly connected to the locking cavity. A plurality of through holes are formed on the mating block.

[0009] Preferably, the piston rod has two sets of first mounting grooves, and a first mating groove is formed between the two sets of first mounting grooves. A first wear-resistant ring is installed on the first mounting groove, and a first dustproof sealing ring is installed on the first mating groove. The sliding cavity has two sets of second mounting grooves, and a second mating groove is formed between the two sets of second mounting grooves. A second wear-resistant ring is installed on the second mounting groove, and a second dustproof sealing ring is installed on the second mating groove.

[0010] Preferably, the locking piston has two sets of third mounting grooves, and a third mating groove is formed between the two sets of third mounting grooves. A third wear-resistant ring is installed in the third mounting groove, and a third dustproof sealing ring is installed in the third mating groove.

[0011] Preferably, an oil passage hole is provided at the upper end of the cylinder body, an oil passage pipe is fixedly installed on the cylinder body, the oil passage pipe is fixedly connected to the oil passage hole, and the other end of the oil passage pipe is fixedly connected to the return oil pipe.

[0012] Preferably, a cylinder bottom is integrally installed below the cylinder body, and an earring is fixedly installed on the piston rod. Beneficial effects

[0013] This invention provides a mechanical locking cylinder. Compared with the prior art, it has the following advantages:

[0014] This mechanical locking cylinder uses a locking mechanism installed in the locking chamber inside the cylinder. When hydraulic oil is introduced into the inlet pipe, the steel ball is pushed open, allowing the hydraulic oil to enter the sliding chamber through the through hole on the mating block, thus pushing the piston rod out. When the hydraulic oil stops flowing into the inlet pipe, the steel ball is pushed into the second L-shaped cavity under the action of the spring, preventing the hydraulic oil in the sliding chamber from flowing back, thus locking the piston rod. When hydraulic oil is introduced from the return pipe, the hydraulic oil pushes the locking piston out of the mating cavity, and under the action of the mating bracket, pushes the steel ball open, thus unlocking the piston rod. This design has a simple structure and achieves the function of automatic locking. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0016] Figure 2 This is a schematic diagram of the cylinder body of this utility model;

[0017] Figure 3 This is a disassembly diagram of the piston rod of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the locking cavity of this utility model;

[0019] Figure 5 This is a schematic diagram of the locking mechanism of this utility model;

[0020] Figure 6 This utility model Figure 3 Enlarged view of point A in the middle;

[0021] Figure 7 This utility model Figure 3 Enlarged diagram of point B in the middle.

[0022] In the diagram: 1. Cylinder block; 2. Cylinder bottom; 3. Ear ring; 4. Oil return pipe; 5. Oil passage pipe; 6. Oil inlet pipe; 7. Locking chamber; 8. Piston rod; 9. Sliding chamber; 10. First L-shaped cavity; 11. Second L-shaped cavity; 12. Locking mechanism; 13. Mating block; 14. First mounting groove; 15. First mating groove; 16. First wear-resistant ring; 17. First dustproof sealing ring; 18. Second mounting groove; 19. Second mating groove; 20. Second wear-resistant ring; 21. Second dustproof sealing ring; 22. Third mounting groove; 23. Third mating groove; 24. Third wear-resistant ring; 25. Third dustproof sealing ring; 26. Locking piston; 27. Mating bracket; 28. Steel ball; 29. ​​Mating hole; 30. Mating rod; 31. Spring; 32. Mating cavity; 33. Oil passage hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0024] Please see Figure 1-7 This utility model provides a technical solution: a mechanical locking cylinder, including a cylinder body 1, a locking cavity 7, a sliding cavity 9, and a mating cavity 32. A piston rod 8 is slidably installed in the sliding cavity 9. A locking mechanism 12 is installed in the locking cavity 7. The locking mechanism 12 includes a mating block 13, which is fixedly installed in the locking cavity 7. A mating rod 30 is fixedly installed on the mating block 13. A steel ball 28 is slidably installed on the mating rod 30. A mating hole 29 is opened on the steel ball 28, which mates with the mating rod 30. A spring 31 is fitted on the mating rod 30. A locking piston 26 is slidably installed in the mating cavity 32. One end of the locking piston 26... A mating bracket 27 is fixedly installed, and the mating bracket 27 mates with the steel ball 28; an oil inlet pipe 6 and an oil return pipe 4 are fixedly installed on the cylinder body 1; a first L-shaped cavity 10 and a second L-shaped cavity 11 are opened inside the cylinder body 1; the first L-shaped cavity 10 is fixedly connected to the oil return pipe 4; the second L-shaped cavity 11 is fixedly connected to the oil inlet pipe 6; the other end of the first L-shaped cavity 10 is fixedly connected to the mating cavity 32; the other end of the second L-shaped cavity 11 is fixedly connected to the locking cavity 7; a plurality of through holes are opened on the mating block 13; an oil passage hole 33 is opened at the upper end of the cylinder body 1; an oil passage pipe 5 is fixedly installed on the cylinder body 1; the oil passage pipe 5 is fixedly connected to the oil passage hole 33; the other end of the oil passage pipe 5 is fixedly connected to the oil return pipe 4.

[0025] In use, hydraulic oil enters the second L-shaped cavity 11 through the inlet pipe 6. Under pressure, the steel ball 28 is pushed open, allowing the hydraulic oil to enter the locking cavity 7. Then, it enters the left side of the sliding cavity 9 through the through hole on the mating block 13, thus pushing the piston rod 8 out. When the hydraulic oil stops flowing from the inlet pipe 6, the spring 31 pushes the steel ball 28 back into the second L-shaped cavity 11 through the mating hole 29 and the mating rod 30, preventing the backflow of hydraulic oil and thus pushing the piston rod 8 out. Locking: When hydraulic oil enters the first L-shaped cavity 10 and the oil passage 5 through the return oil pipe 4, the locking piston 26 is pushed out of the mating cavity 32 under pressure. Then, under the action of the mating bracket 27, the steel ball 28 is pushed open, allowing the hydraulic oil on the left side of the sliding cavity 9 to flow back. At the same time, the hydraulic oil in the oil passage 5 enters the right side of the sliding cavity 9 through the oil passage hole 33. Then, the piston rod 8 is lowered into the cylinder body 1. When the hydraulic oil stops flowing from the return oil pipe 4, the piston rod 8 will be locked again.

[0026] The piston rod 8 has two sets of first mounting grooves 14, and a first mating groove 15 is formed between the two sets of first mounting grooves 14. A first wear-resistant ring 16 is installed on the first mounting groove 14, and a first dustproof sealing ring 17 is installed on the first mating groove 15. The sliding cavity 9 has two sets of second mounting grooves 18, and a second mating groove 19 is formed between the two sets of second mounting grooves 18. A second wear-resistant ring 20 is installed on the second mounting groove 18, and a second dustproof sealing ring 21 is installed on the second mating groove 19. The locking piston 26 has two sets of third mounting grooves 22, and a third mating groove 23 is formed between the two sets of third mounting grooves 22. A third wear-resistant ring 24 is installed in the third mounting groove 22, and a third dustproof sealing ring 25 is installed in the third mating groove 23. A cylinder bottom 2 is integrally installed below the cylinder body 1, and an ear ring 3 is fixedly installed on the piston rod 8.

[0027] In use, the first wear-resistant ring 16, the second wear-resistant ring 20, and the third wear-resistant ring 24 serve to guide, support, prevent wear, and protect the seals; the first dustproof sealing ring 17, the second dustproof sealing ring 21, and the third dustproof sealing ring 25 serve to prevent external contaminants from entering, protect internal components, extend the life of the hydraulic cylinder, and maintain system performance; the lug 3 serves to connect, transmit force and torque, guide, and adapt to different working conditions.

[0028] Working principle: During use, hydraulic oil enters the second L-shaped cavity 11 through the oil inlet pipe 6. Under pressure, the steel ball 28 is pushed open, allowing the hydraulic oil to enter the locking cavity 7. Then, it enters the left side of the sliding cavity 9 through the through hole on the mating block 13, thus pushing the piston rod 8 out. When the hydraulic oil stops flowing from the oil inlet pipe 6, the spring 31 pushes the steel ball 28 back into the second L-shaped cavity 11 through the mating hole 29 and the mating rod 30, preventing the backflow of hydraulic oil and thus pushing the piston... Rod 8 is locked; when hydraulic oil enters the first L-shaped cavity 10 and the oil passage 5 through the return oil pipe 4, the locking piston 26 is pushed out of the mating cavity 32 under pressure, and then the steel ball 28 is pushed open under the action of the mating bracket 27, allowing the hydraulic oil on the left side of the sliding cavity 9 to flow back. At the same time, the hydraulic oil in the oil passage 5 enters the right side of the sliding cavity 9 through the oil passage hole 33, and then the piston rod 8 is lowered into the cylinder body 1. When the hydraulic oil stops flowing from the return oil pipe 4, the piston rod 8 will be locked again.

[0029] Among them, the first wear-resistant ring 16, the second wear-resistant ring 20 and the third wear-resistant ring 24 serve to guide, support, prevent wear and protect the seals; the first dustproof sealing ring 17, the second dustproof sealing ring 21 and the third dustproof sealing ring 25 serve to prevent external contaminants from entering, protect internal components, extend the life of the hydraulic cylinder and maintain system performance; the clevis 3 serves to connect, transmit force and torque, guide and adapt to different working conditions. This device has a simple structure and realizes the self-locking function of the hydraulic cylinder.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical locking cylinder, comprising a cylinder body (1), characterized in that: The cylinder (1) has a locking cavity (7), a sliding cavity (9) and a mating cavity (32). A piston rod (8) is slidably installed in the sliding cavity (9). A locking mechanism (12) is installed in the locking cavity (7). The locking mechanism (12) includes a mating block (13). The mating block (13) is fixedly installed in the locking cavity (7). A mating rod (30) is fixedly installed on the mating block (13). A steel ball (28) is slidably installed on the mating rod (30). A mating hole (29) is opened on the steel ball (28). The mating hole (29) mates with the mating rod (30). A spring (31) is fitted on the mating rod (30). A locking piston (26) is slidably installed in the mating cavity (32). A mating bracket (27) is fixedly installed at one end of the locking piston (26). The mating bracket (27) mates with the steel ball (28).

2. The mechanical locking cylinder according to claim 1, characterized in that: The cylinder body (1) is fixedly installed with an oil inlet pipe (6) and an oil return pipe (4). The cylinder body (1) has a first L-shaped cavity (10) and a second L-shaped cavity (11). The first L-shaped cavity (10) is fixedly connected to the oil return pipe (4), and the second L-shaped cavity (11) is fixedly connected to the oil inlet pipe (6). The other end of the first L-shaped cavity (10) is fixedly connected to the mating cavity (32), and the other end of the second L-shaped cavity (11) is fixedly connected to the locking cavity (7). The mating block (13) has several through holes.

3. A mechanical locking cylinder according to claim 1, characterized in that: The piston rod (8) has two sets of first mounting grooves (14), and a first mating groove (15) is provided between the two sets of first mounting grooves (14). A first wear-resistant ring (16) is installed on the first mounting groove (14), and a first dustproof sealing ring (17) is installed on the first mating groove (15). The sliding cavity (9) has two sets of second mounting grooves (18), and a second mating groove (19) is provided between the two sets of second mounting grooves (18). A second wear-resistant ring (20) is installed on the second mounting groove (18), and a second dustproof sealing ring (21) is installed on the second mating groove (19).

4. A mechanical locking cylinder according to claim 1, characterized in that: The locking piston (26) has two sets of third mounting grooves (22), and a third mating groove (23) is provided between the two sets of third mounting grooves (22). A third wear-resistant ring (24) is installed in the third mounting groove (22), and a third dustproof sealing ring (25) is installed in the third mating groove (23).

5. A mechanical locking cylinder according to claim 2, characterized in that: The cylinder body (1) has an oil passage hole (33) at the upper end, and an oil passage pipe (5) is fixedly installed on the cylinder body (1). The oil passage pipe (5) is fixedly connected to the oil passage hole (33), and the other end of the oil passage pipe (5) is fixedly connected to the return oil pipe (4).

6. A mechanical locking cylinder according to claim 1, characterized in that: The cylinder bottom (2) is integrally installed below the cylinder body (1), and the piston rod (8) is fixedly installed with an earring (3).

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