Hydraulic cylinder with self-locking function

Abstract

The invention relates to the technical field of mechanical equipment, and discloses a hydraulic cylinder with a self-locking function, which comprises a cylinder body, a top pipeline of the cylinder body is connected with a fixed disc, the top end of the fixed disc is fixedly connected with two vertical blocks, a bottom pipeline of the cylinder body is connected with an oil inlet pipe, and a surface pipeline of the cylinder body is connected with a connecting pipe. According to the self-locking hydraulic cylinder, through cooperative work of the valve mechanism and the self-locking mechanism, an efficient and accurate method is provided to control the position of the hydraulic cylinder, and therefore the self-locking hydraulic cylinder can be used for controlling the position of the hydraulic cylinder; the problems that an existing hydraulic cylinder is inaccurate in position locking and lacks an effective self-locking mechanism, so that the load is unstable, and the sealing performance is insufficient are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and specifically to a hydraulic cylinder with a self-locking function. Background Art

[0002] As a key actuating element in industrial automation, the hydraulic cylinder has evolved from a simple linear motion device to a complex multi-functional equipment. With the increasing requirements for production efficiency and precision in the manufacturing industry, the design of the hydraulic cylinder is also constantly innovating. Early designs mainly focused on providing strong pushing and pulling forces, while modern designs pay more attention to improving control precision, stability, and durability. Especially in high-end application fields such as aerospace and heavy machinery, the requirements for hydraulic cylinders are even more stringent, not only requiring high load capacity but also maintaining stable operation in extreme environments.

[0003] Traditional hydraulic cylinders rely on external locking devices or complex hydraulic circuits to maintain a specific position, increasing system complexity and cost, and may cause inconvenience in operation. Secondly, many hydraulic cylinders lack an effective self-locking mechanism and cannot maintain a fixed position without continuous oil supply, resulting in unstable loads and even potential safety hazards. In addition, traditional designs have limitations in sealing performance, and seals are prone to wear or failure under high-pressure conditions, affecting the reliability and lifespan of the system. In contrast, the present invention can effectively overcome the above problems by introducing a unique self-locking mechanism, achieving stable locking of the hydraulic cylinder at any position, while simplifying the operation process and improving the reliability of the overall system. Summary of the Invention

[0004] Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a hydraulic cylinder with a self-locking function, mainly to solve the problems of unstable loads and insufficient sealing performance.

[0005] Technical Solutions To achieve the above object, the present invention provides the following technical solutions: A hydraulic cylinder with a self-locking function, including a cylinder body, a fixed disk is provided at the top of the cylinder body, an oil inlet pipe is connected to the bottom of the cylinder body through a pipeline, a connecting pipe communicating with the internal space of the cylinder body is provided on the side wall of the cylinder body, a hydraulic pump is provided on the side of the connecting pipe away from the cylinder body, and an oil return pipe is connected to the air outlet of the hydraulic pump through a pipeline; A valve mechanism, which is used to control the on-off between the oil inlet pipe and the connecting pipe by controlling the displacement of a sealing block in the cylinder body; A self-locking mechanism, which is used to cooperate with the valve mechanism to stabilize the position of the sealing block.

[0006] Furthermore, the valve mechanism includes a push rod and a first concave block. Two vertical blocks are fixedly connected to the upper end of the fixed disk. The push rod is arranged between the two vertical blocks. The lower end of the push rod passes through the fixed disk and is fixedly connected to the sealing block. The push rod is slidably connected to the fixed disk, and the upper end of the push rod is fixedly connected to the first concave block.

[0007] Furthermore, the valve mechanism further includes a linkage bar, a second concave block, a sealing block and a sealing gasket. A sealing gasket cooperating with the sealing block is arranged at the inner top of the cylinder block. The middle position of the linkage bar is rotatably connected to one of the vertical blocks. One end of the linkage bar is movably clamped with the first concave block, and the other end is movably clamped with the second concave block.

[0008] Furthermore, the self-locking mechanism includes a fixed frame, a moving rod, a slider, a rotating rod, a limiting ring, a rack, a gear, a spring and a handle. The fixed frame is fixedly connected to the side end of the fixed disk. The slider is slidably connected to the inner wall of the fixed frame. The rack is fixedly connected to the inner wall of the fixed frame. The rotating rod is rotatably connected to the inner wall of the slider. The limiting ring is sleeved on the surface of the rotating rod.

[0009] Furthermore, the gear is fixedly connected to the side end of the rotating rod. The gear meshes with the rack. The moving rod is fixedly connected to the side end of the slider and is slidably connected to the two inner walls of the fixed frame. The spring is sleeved on the surface of the moving rod. One end of the spring is fixedly connected to the inner wall of the fixed frame, and the other end is fixedly connected to the side end of the slider. The handle is fixedly connected to the side end of the rotating rod. The upper end of the moving rod is fixedly connected to the second concave block, and the lower end of the moving rod is fixedly connected with a first limiting block.

[0010] Furthermore, limiting frames are fixedly connected to the closer ends of the two vertical blocks. Second limiting blocks cooperating with the limiting frames are fixedly connected to the surface of the push rod.

[0011] Furthermore, a chamfer is arranged at the opening of the oil inlet pipe. The oil inlet pipe is made of a rubber hose.

[0012] Furthermore, the sealing block is closely attached to the inner wall of the cylinder block, and the diameter of the sealing block is larger than the inner diameter of the connecting pipe.

[0013] Advantageous Effects Compared with the prior art, the present invention provides a hydraulic cylinder with a self-locking function, having the following advantageous effects: 1. Through the design of the self-locking mechanism, this hydraulic cylinder can be stably locked at any required position. Specifically, when it is necessary to fix the position of the inlet pipe, the operator can rotate the handle, causing the rotating rod to drive the gear to rotate, thereby pushing the slider to move, enabling the moving rod to displace back and forth, and finally controlling the valve mechanism to close the connection between the inlet pipe and the connecting pipe. This design ensures that the load can be safely held in the required position, avoiding potential safety hazards caused by accidental movement.

[0014] 2. By the collaborative work of the valve mechanism and the self-locking mechanism, the present invention provides an efficient and precise method to control the position of the hydraulic cylinder. Through the cooperation of the sealing block and the sealing gasket, effective closing or opening of the oil circuit can be achieved, thereby precisely controlling the movement state of the hydraulic cylinder. In addition, the design of the second limit block and the limit frame further enhances the limitation of the movement range of the push rod by the system, improving the overall operation accuracy and reliability.

[0015] 3. With the self-locking mechanism of the present invention, users only need to simply operate the handle to complete the adjustment and locking of the position of the hydraulic cylinder, greatly simplifying the operation process, eliminating the need for complex debugging procedures, reducing the technical threshold for users, and improving work efficiency.

[0016] 4. In the present invention, components such as the fixed disk, vertical block, and sealing block are all made of durable materials and are carefully designed to adapt to different industrial application scenarios. For example, the opening of the inlet pipe is made of rubber hose material and chamfered, which not only increases the wear resistance of the interface but also effectively prevents the leakage risk caused by friction.

[0017] 5. The entire system structure in the present invention is compact, reducing the number of unnecessary components and the manufacturing cost. At the same time, each key component is easy to disassemble and replace, facilitating daily maintenance and prolonging the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view of a hydraulic cylinder with a self-locking function proposed by the present invention; Figure 2 is the schematic diagram of the self-locking mechanism of a hydraulic cylinder with a self-locking function proposed by the present invention; Figure 3 is the first sectional view of the self-locking mechanism of a hydraulic cylinder with a self-locking function proposed by the present invention; Figure 4 is the second sectional view of the self-locking mechanism of a hydraulic cylinder with a self-locking function proposed by the present invention; Figure 5 is the sectional view of the valve mechanism of a hydraulic cylinder with a self-locking function proposed by the present invention.

[0019] In the figure: 1. Cylinder block; 2. Inlet oil pipe; 3. Connecting pipe; 4. Hydraulic pump; 5. Return oil pipe; 6. Fixed disk; 7. Fixed frame; 8. Moving rod; 9. Slide block; 10. Rotating rod; 11. Limit ring; 12. Rack; 13. Gear; 14. Spring; 15. Handle; 16. First limit block; 17. Vertical block; 18. Push rod; 19. First concave block; 20. Linking bar; 21. Second concave block; 22. Limit frame; 23. Second limit block; 24. Sealing gasket; 25. Sealing block. Detailed implementation manners

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The serial numbers assigned to the components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise clearly defined and limited, both include direct and indirect connection and coupling. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0023] Referring to Figures 1-5 , a hydraulic cylinder with a self-locking function, comprising a cylinder block 1, a fixed disk 6 is provided at the top of the cylinder block 1, an inlet oil pipe 2 is connected to the bottom of the cylinder block 1 through a pipeline, a connecting pipe 3 communicating with the internal space of the cylinder block 1 is provided on the side wall of the cylinder block 1, a hydraulic pump 4 is provided on the side away from the cylinder block 1 of the connecting pipe 3, and an outlet of the hydraulic pump 4 is connected to a return oil pipe 5 through a pipeline; The valve mechanism is used to achieve the on-off between the inlet pipe 2 and the connecting pipe 3 by controlling the displacement of the sealing block 25 within the cylinder block 1; The self-locking mechanism is used to cooperate with the valve mechanism to stabilize the position of the sealing block 25.

[0024] Furthermore, the valve mechanism controls the displacement of the sealing block 25 within the cylinder block 1 to achieve the on-off between the inlet pipe 2 and the connecting pipe 3, thereby precisely controlling the motion state of the hydraulic cylinder. The self-locking mechanism cooperates with the valve mechanism to stabilize the position of the sealing block 25, ensuring the stable locking of the hydraulic cylinder at any position, and avoiding load instability and safety hazards. This design solves the problems of inaccurate position locking, lack of effective self-locking mechanism, and insufficient sealing performance in existing hydraulic cylinders, improving the control accuracy and reliability of the hydraulic cylinder.

[0025] Specifically, the valve mechanism includes a push rod 18 and a first concave block 19. Two vertical blocks 17 are fixedly connected to the upper end of the fixed disk 6. The push rod 18 is arranged between the two vertical blocks 17. The lower end of the push rod 18 passes through the fixed disk 6 and is fixedly connected to the sealing block 25. The push rod 18 is slidably connected to the fixed disk 6, and the upper end of the push rod 18 is fixedly connected to the first concave block 19.

[0026] Furthermore, the push rod 18 is arranged between the two vertical blocks 17, with the lower end fixedly connected to the sealing block 25 and the upper end fixedly connected to the first concave block 19. By moving the push rod 18 up and down, the displacement of the sealing block 25 can be precisely controlled, thereby achieving the on-off between the inlet pipe 2 and the connecting pipe 3. The sliding connection between the push rod 18 and the fixed disk 6 ensures the stable movement of the push rod, improving the reliability and operation accuracy of the system.

[0027] Specifically, the valve mechanism further includes a linkage bar 20, a second concave block 21, a sealing block 25, and a sealing gasket 24. A sealing gasket 24 that cooperates with the sealing block 25 is provided at the inner top of the cylinder block 1. The middle position of the linkage bar 20 is rotatably connected to one of the vertical blocks 17. One end of the linkage bar 20 is movably clamped with the first concave block 19, and the other end is movably clamped with the second concave block 21.

[0028] Furthermore, the middle position of the linkage bar 20 is rotatably connected to the vertical block 17, with one end movably clamped with the first concave block 19 and the other end movably clamped with the second concave block 21. Through the linkage action of the linkage bar 20, precise control of the push rod 18 can be achieved, ensuring the tight fit between the sealing block 25 and the sealing gasket 24, thereby effectively closing or opening the oil circuit. This design improves the stability and operation accuracy of the system, further enhancing the control performance of the hydraulic cylinder.

[0029] Specifically, the self-locking mechanism includes a fixed frame 7, a moving rod 8, a slider 9, a rotating rod 10, a limiting ring 11, a rack 12, a gear 13, a spring 14, and a handle 15. The fixed frame 7 is fixedly connected to the side end of the fixed disk 6. The slider 9 is slidably connected to the inner wall of the fixed frame 7. The rack 12 is fixedly connected to the inner wall of the fixed frame 7. The rotating rod 10 is rotatably connected to the inner wall of the slider 9. The limiting ring 11 is sleeved on the surface of the rotating rod 10.

[0030] Further, the fixed frame 7 is fixedly connected to the side end of the fixed disk 6. The slider 9 is slidably connected to the inner wall of the fixed frame 7. The rack 12 is fixedly connected to the inner wall of the fixed frame 7. The rotating rod 10 is rotatably connected to the inner wall of the slider 9. The limiting ring 11 is sleeved on the surface of the rotating rod 10. By rotating the handle 15, the rotating rod 10 can be driven to rotate, thereby pushing the gear 13 to move along the rack 12, causing the slider 9 to slide, and finally driving the moving rod 8 to displace back and forth to control the opening and closing of the valve mechanism. This design ensures the stable locking of the hydraulic cylinder at any position, is easy to operate, and improves the reliability and safety of the system.

[0031] Specifically, the gear 13 is fixedly connected to the side end of the rotating rod 10. The gear 13 meshes with the rack 12. The moving rod 8 is fixedly connected to the side end of the slider 9. And the moving rod 8 is slidably connected to the inner walls on both sides of the fixed frame 7. The spring 14 is sleeved on the surface of the moving rod 8. One end of the spring 14 is fixedly connected to the inner wall of the fixed frame 7, and the other end is fixedly connected to the side end of the slider 9. The handle 15 is fixedly connected to the side end of the rotating rod 10. The upper end of the moving rod 8 is fixedly connected to the second concave block 21. The lower end of the moving rod 8 is fixedly connected with a first limiting block 16.

[0032] Further, the gear 13 meshes with the rack 12. The moving rod 8 is fixedly connected to the side end of the slider 9. The spring 14 is sleeved on the surface of the moving rod 8, with one end fixed to the inner wall of the fixed frame 7 and the other end fixed to the side end of the slider 9. By rotating the handle 15, the forward and backward displacement of the moving rod 8 can be realized, thereby controlling the opening and closing of the valve mechanism. The upper end of the moving rod 8 is fixedly connected to the second concave block 21, and the lower end is fixedly connected with a first limiting block 16, ensuring the stability and operation accuracy of the system. This design simplifies the operation process and improves the work efficiency and convenience of use.

[0033] Specifically, limiting frames 22 are fixedly connected to the adjacent ends of the two vertical blocks 17. A second limiting block 23 that cooperates with the limiting frame 22 is fixedly connected to the surface of the push rod 18.

[0034] Further, limiting frames 22 are fixedly connected to the adjacent ends of the two vertical blocks 17. A second limiting block 23 that cooperates with the limiting frame 22 is fixedly connected to the surface of the push rod 18. This design ensures the stability of the push rod 18 during movement, improves the reliability and operation accuracy of the system, and further enhances the control performance of the hydraulic cylinder.

[0035] Specifically, a chamfer is provided at the opening of the inlet pipe 2, and the inlet pipe 2 is made of a rubber hose.

[0036] Furthermore, a chamfer is provided at the opening of the inlet pipe 2, and it is made of a rubber hose. This design not only increases the wear resistance of the interface but also effectively prevents the leakage risk caused by friction, improving the reliability and service life of the system. In addition, the flexibility of the rubber hose also improves the adaptability and durability of the inlet pipe, further optimizing the performance of the hydraulic system.

[0037] Specifically, the sealing block 25 closely adheres to the inner wall of the cylinder block 1, and the diameter of the sealing block 25 is larger than the inner diameter of the connecting pipe 3.

[0038] Furthermore, the sealing block 25 closely adheres to the inner wall of the cylinder block 1 and has a diameter larger than the inner diameter of the connecting pipe 3. Through cooperation with the sealing gasket 24, effective sealing of the oil circuit can be achieved, ensuring the sealing performance of the hydraulic cylinder and preventing hydraulic oil leakage. This design improves the reliability and service life of the system and further optimizes the performance of the hydraulic cylinder.

[0039] The working principle of the present invention: During use, first, the hydraulic pump 4 supplies oil to the hydraulic cylinder. When it is necessary to fix the inlet pipe 2 at a specific position, the operator rotates the handle 15, driving the rotating rod 10 to rotate, and then pushing the gear 13 to move along the rack 12, causing the slider 9 to slide along the fixed frame 7, and finally driving the moving rod 8 to move back and forth. The displacement of the moving rod 8 drives the second concave block 21, which pushes the first concave block 19 through the linkage bar 20, and then causes the push rod 18 to move up and down, driving the sealing block 25 to closely fit with the sealing gasket 24, achieving the sealing of the oil circuit. At this time, the hydraulic cylinder is locked in the required position, ensuring the safe and stable load. The whole process is easy to operate and does not require complex debugging steps, greatly improving the work efficiency and convenience of use.

[0040] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0041] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A hydraulic cylinder with a self-locking function, comprising a cylinder body (1), characterized in that: A fixing plate (6) is provided on the top of the cylinder body (1); an oil inlet pipe (2) is connected to the bottom pipeline of the cylinder body (1); a connecting pipe (3) communicating with the internal space of the cylinder body (1) is provided on the side wall of the cylinder body (1); a hydraulic pump (4) is provided on the side of the connecting pipe (3) away from the cylinder body (1); and an oil return pipe (5) is connected to the air outlet pipeline of the hydraulic pump (4); A valve mechanism, the valve mechanism being used to realize the connection and disconnection between the oil inlet pipe (2) and the connecting pipe (3) by controlling the displacement of the sealing block (25) in the cylinder body (1); A self-locking mechanism, the self-locking mechanism is used to cooperate with the valve mechanism to stabilize the position of the sealing block (25).

2. A hydraulic cylinder with self-locking function according to claim 1, characterized in that: The valve mechanism comprises a push rod (18) and a first concave block (19); the upper end of the fixed disk (6) is fixedly connected to two vertical blocks (17); the push rod (18) is arranged between the two vertical blocks (17); the lower end of the push rod (18) passes through the fixed disk (6) and is fixedly connected to the sealing block (25); the push rod (18) is slidably connected to the fixed disk (6); and the upper end of the push rod (18) is fixedly connected to the first concave block (19).

3. A hydraulic cylinder with self-locking function according to claim 2, characterized in that: The valve mechanism further comprises a linkage bar (20), a second concave block (21), a sealing block (25) and a sealing gasket (24); a sealing gasket (24) cooperating with the sealing block (25) is provided on the inner top of the cylinder body (1); a middle position of the linkage bar (20) is rotatably connected to one of the vertical blocks (17); one end of the linkage bar (20) is movably engaged with the first concave block (19), and the other end is movably engaged with the second concave block (21).

4. A hydraulic cylinder with self-locking function according to claim 3, characterized in that: The self-locking mechanism comprises a fixed frame (7), a movable rod (8), a slider (9), a rotating rod (10), a limiting ring (11), a rack (12), a gear (13), a spring (14) and a handle (15); the fixed frame (7) is fixedly connected to the side end of the fixed plate (6); the slider (9) is slidably connected to the inner wall of the fixed frame (7); the rack (12) is fixedly connected to the inner wall of the fixed frame (7); the rotating rod (10) is rotatably connected to the inner wall of the slider (9); and the limiting ring (11) is sleeved on the surface of the rotating rod (10).

5. A hydraulic cylinder with self-locking function according to claim 4, characterized in that: The gear (13) is fixedly connected to the side end of the rotating rod (10), the gear (13) is meshed with the rack (12), the moving rod (8) is fixedly connected to the side end of the slider (9), and the moving rod (8) is slidably connected to the inner walls of both sides of the fixed frame (7), the spring (14) is sleeved on the surface of the moving rod (8), one end of the spring (14) is fixedly connected to the inner wall of the fixed frame (7), and the other end is fixedly connected to the side end of the slider (9), the handle (15) is fixedly connected to the side end of the rotating rod (10), the upper end of the moving rod (8) is fixedly connected to the second concave block (21), and the lower end of the moving rod (8) is fixedly connected to the first limit block (16).

6. A hydraulic cylinder with self-locking function according to claim 5, characterized in that: The adjacent ends of the two upright blocks (17) are fixedly connected to a limit frame (22), and the surface of the push rod (18) is fixedly connected to a second limit block (23) that cooperates with the limit frame (22).

7. A hydraulic cylinder with self-locking function according to claim 6, characterized in that: The opening of the oil inlet pipe (2) is provided with a chamfer, and the oil inlet pipe (2) is made of a rubber hose.

8. The hydraulic cylinder with self-locking function according to claim 7, characterized in that: The sealing block (25) is in close contact with the inner wall of the cylinder body (1), and the diameter of the sealing block (25) is larger than the inner diameter of the connecting pipe (3).

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