Hydraulic cylinder with self-locking function

Abstract

The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a self-locking function. Comprising a cylinder body, an oil inlet pipe, a piston, a telescopic rod, a mounting frame, fixing pipes, a sliding rod, a clamping block and the like, a plurality of annular clamping grooves are evenly formed in the outer side of the telescopic rod in the axial direction at intervals, the mounting frame is connected to the top face of the cylinder body, the telescopic rod slidably penetrates through the middle of the mounting frame, the fixing pipes are connected to the mounting frame in the circumferential direction at intervals, and the sliding rod is slidably connected into the fixing pipes; the clamping block is fixedly connected to the end of the sliding rod. According to the hydraulic cylinder, the flow direction of hydraulic oil is changed through the electric control valve, the hydraulic oil can be conveyed into the fixing pipe after the telescopic rod ascends to a proper height, the clamping block can be driven by the hydraulic oil to move to be clamped into the annular clamping groove in the telescopic rod so as to lock the telescopic rod, and therefore in the working process of the hydraulic cylinder, the telescopic rod can be locked. And the telescopic rod is prevented from being pressed back into the cylinder body by gravity, so that accidents can be avoided, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a self-locking function. Background Art

[0002] The hydraulic cylinder is an actuator in the hydraulic transmission system. Its function is to convert the hydraulic energy in the hydraulic system into mechanical energy of linear reciprocating motion or swinging motion. The working principle of the hydraulic cylinder is: when the hydraulic oil is under pressure inside the hydraulic cylinder, it will push the piston or plunger to move, thereby driving the mechanical parts connected to it to complete pushing, pulling or lifting and other actions.

[0003] Patent publication number CN215980229U discloses a hydraulic cylinder with a self-locking function, including a cylinder body, a piston and a piston push rod, an oil inlet pipe is fixedly provided at the bottom of the outer end of the cylinder body, a movable sealing plate is provided at one end of the oil inlet pipe, a sealing plate is fixedly provided on the side of the movable sealing plate in contact with one end of the oil inlet pipe, a sealing groove is opened at one end of the oil inlet pipe, the sealing plate is arranged inside the sealing groove, a connecting rod is fixedly provided on the side of the movable sealing plate away from one end of the oil inlet pipe, one end of the connecting rod passes through the outer end of the cylinder body and extends to the outside of the cylinder body, and a pull block is fixedly provided at one end of the connecting rod.

[0004] The above patent controls the movement of the connecting rod to push the movable blocking plate and the sealing plate to block the end of the oil inlet pipe, thereby realizing the self-locking function of the hydraulic cylinder. However, the connecting rod is immersed in the hydraulic oil of the cylinder body, and the connecting rod can slide relative to the cylinder body. When the weight carried by the telescopic rod of the hydraulic cylinder is too large, the hydraulic cylinder will malfunction and cause the telescopic rod to be pressed back into the cylinder body by gravity. The pressurized hydraulic oil will push the connecting rod to slide out of the cylinder body, causing the movable blocking plate and the sealing plate to separate from the end of the oil inlet pipe, thereby failing to achieve the blocking effect on the end of the oil inlet pipe. In this way, the locking of the hydraulic cylinder cannot be achieved, posing a safety hazard. Utility Model Content

[0005] Based on this, the utility model provides a hydraulic cylinder with a self-locking function, which can overcome the shortcomings of the existing hydraulic cylinders. During use, if the weight carried by the telescopic rod of the hydraulic cylinder is too large, the telescopic rod will be pressed back into the cylinder body by gravity, which is prone to accidents and poses a safety hazard.

[0006] The technical implementation scheme of the utility model is: a hydraulic cylinder with a self-locking function, including a cylinder body, an oil inlet pipe, a piston and a telescopic rod, and also including a mounting frame, a fixed pipe, a sliding rod, a clamping block and a driving assembly. A plurality of annular clamping grooves are evenly opened at intervals along the axial direction on the outer side of the telescopic rod. The mounting frame is connected to the top surface of the cylinder body, and the telescopic rod slides through the middle of the mounting frame. A plurality of groups of fixed pipes are connected to the mounting frame at intervals along the circumferential direction. The sliding rod is slidably connected in the fixed pipe, and the clamping block is fixedly connected to the end of the sliding rod. When the hydraulic oil enters the cylinder body through the oil inlet pipe, the piston and the telescopic rod can be pushed to rise. When the telescopic rod rises to a suitable height, the driving assembly can drive the sliding rod to move in a direction close to the telescopic rod, and the sliding rod can drive the clamping block to move to the annular clamping groove to lock the telescopic rod.

[0007] Furthermore, the driving assembly includes an annular oil pipe, a connecting pipe, an oil delivery pipe and an electric control valve. The annular oil pipe is connected to the outside of the mounting frame, the connecting pipe connects the annular oil pipe and the fixed pipe, the electric control valve is installed on the oil inlet pipe, the oil delivery pipe connects the annular oil pipe and the electric control valve, and the flow direction of the hydraulic oil is switched by the electric control valve, so that the hydraulic oil can flow through the oil delivery pipe, the annular oil pipe, the connecting pipe and the fixed pipe in turn, and the hydraulic oil in the fixed pipe can push the sliding rod to move in the direction close to the telescopic rod.

[0008] Furthermore, it also includes guide rails and T-shaped sliders. Multiple groups of guide rails are connected to the bottom surface of the installation frame at intervals along the circumferential direction. The T-shaped sliders are slidably connected to the guide rails. The T-shaped sliders correspond to the blocks one by one, and the top surfaces of the T-shaped sliders are fixedly connected to the bottom surfaces of the corresponding blocks to guide and support the blocks.

[0009] Furthermore, it also includes a connecting seat, a rotating rod and a support leg. The three connecting seats are connected to the outside of the cylinder body at intervals along the circumferential direction. The rotating rod is rotatably connected to the connecting seat, and the support leg is rotatably connected to the end of the rotating rod. When the three rotating rods and the support leg are rotated and unfolded, a triangular supporting surface can be formed to support the cylinder body.

[0010] Furthermore, a storage groove is provided on the rotating rod so that the supporting legs can be stored in the storage groove when they are rotated and retracted.

[0011] Furthermore, it also includes magnets, which are respectively connected to the side of the rotating rod and the outer side of the cylinder body, so that when the rotating rod is rotated and retracted, the magnets can fix the position of the rotating rod through magnetic force.

[0012] The utility model has the following advantages: 1. The utility model changes the flow direction of the hydraulic oil through the electric control valve, and can transport the hydraulic oil to the fixed pipe after the telescopic rod rises to a suitable height. The hydraulic oil can drive the clamping block to move to the annular clamping groove on the telescopic rod to lock the telescopic rod. During the working process of the hydraulic cylinder, the telescopic rod can be prevented from being pressed back into the cylinder body by gravity, thereby avoiding accidents and improving safety.

[0013] 2. The T-shaped slider of the utility model can move synchronously with the card block, and when the card block locks the telescopic rod, the T-shaped slider can provide support for the bottom surface of the card block to prevent the card block from breaking when subjected to the pressure of the telescopic rod, thereby ensuring the stability of the hydraulic cylinder during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the first state of the utility model;

[0015] Figure 2 This is a schematic diagram of the second state of the utility model;

[0016] Figure 3 It is a cross-sectional view of the cylinder body of the utility model;

[0017] Figure 4 It is a cross-sectional view of the installation frame of the utility model;

[0018] Figure 5 This is a schematic diagram of the installation of the annular oil pipe, the connecting pipe and the oil delivery pipe of the utility model;

[0019] Figure 6 This is a schematic diagram of the installation of the electric control valve of the utility model;

[0020] Figure 7 This is a schematic diagram of the installation of the guide rail and T-shaped slider of the utility model;

[0021] Figure 8 This is a schematic diagram of the connection structure between the T-shaped slider and the clamping block of the utility model;

[0022] Fig. 9 The utility model is a schematic diagram of the installation of the connecting seat, the rotating rod, the supporting feet and the magnet.

[0023] Figure numerals: 1-cylinder body, 101-oil inlet pipe, 2-piston, 3-telescopic rod, 301-annular groove, 4-installation frame, 5-fixed pipe, 6-sliding rod, 7-block, 8-annular oil pipe, 9-connecting pipe, 10-oil delivery pipe, 11-electrically controlled valve, 12-guide rail, 13-T-shaped slider, 14-connecting seat, 15-rotating rod, 16-support foot, 17-storage groove, 18-magnet. DETAILED DESCRIPTION

[0024] Embodiment: A hydraulic cylinder with a self-locking function, such as Figure 1-Figure 6As shown, it includes a cylinder body 1, an oil inlet pipe 101, a piston 2 and a telescopic rod 3. The oil inlet pipe 101 is connected to the lower right side of the cylinder body 1, the piston 2 is slidably connected to the cylinder body 1, the telescopic rod 3 is connected to the top surface of the piston 2, and the telescopic rod 3 slides through the top surface of the cylinder body 1, so that the external hydraulic oil can enter the cylinder body 1 through the oil inlet pipe 101. As the hydraulic oil in the cylinder body 1 gradually increases, the hydraulic oil can push the piston 2 and the telescopic rod 3 to rise in the cylinder body 1; it also includes a mounting frame 4, a fixed pipe 5, a sliding rod 6, a clamping block 7 and a driving assembly. A plurality of annular clamping grooves 301 are evenly spaced along the axial direction on the outer side of the telescopic rod 3. The mounting frame 4 is connected to the top surface of the cylinder body 1, and the telescopic rod 3 slides through the middle part of the mounting frame 4. Eight groups of fixed pipes 5 are connected to the mounting frame 4 at intervals along the circumferential direction, and the number of each group of fixed pipes 5 is The amount is two, and the heights of the eight groups of fixed tubes 5 are gradually increased in the counterclockwise direction, so that the eight groups of fixed tubes 5 are located at different heights, but the two fixed tubes 5 in the same group are of the same height. The sliding rod 6 is slidably connected in the fixed tube 5, and the block 7 is fixedly connected to the end of the sliding rod 6. The number of the blocks 7 is sixteen. When the hydraulic oil enters the cylinder body 1 through the oil inlet pipe 101, it can push the piston 2 and the telescopic rod 3 to rise. When the telescopic rod 3 rises to a suitable height, the driving assembly can drive the sliding rod 6 to move in the direction close to the telescopic rod 3. The sliding rod 6 can drive the block 7 to move to the annular groove 301 to lock the telescopic rod 3. In this way, the telescopic rod 3 can be prevented from being pressed back into the cylinder body 1 by gravity during the working process of the hydraulic cylinder, thereby avoiding accidents and improving safety.

[0025] like Figure 5 and Figure 6 As shown, the drive assembly includes an annular oil pipe 8, a connecting pipe 9, an oil delivery pipe 10 and an electric control valve 11. The annular oil pipe 8 is connected to the upper outer side of the mounting frame 4. The two ends of the connecting pipe 9 are respectively connected to the bottom of the annular oil pipe 8 and the top surface of the fixed pipe 5. The electric control valve 11 is installed on the oil inlet pipe 101. The two ends of the oil delivery pipe 10 are respectively connected to the side of the annular oil pipe 8 and the electric control valve 11. The electric control valve 11 is an electric-controlled three-way valve, so that the electric control valve 11 can control the flow direction of the hydraulic oil in the oil inlet pipe 101. When the electric control valve 11 controls the oil delivery pipe 10 to be connected with the oil inlet pipe 101, the external hydraulic oil can flow through the oil delivery pipe 10, the annular oil pipe 8, the connecting pipe 9 and the fixed pipe 5 in sequence. Then, the hydraulic oil in the fixed pipe 5 can push the sliding rod 6 to move in the direction close to the telescopic rod 3, so that the clamping block 7 can extend into the annular clamping groove 301 to lock the telescopic rod 3.

[0026] like Figure 7 and Figure 8As shown, it also includes guide rails 12 and T-shaped sliders 13. Multiple groups of guide rails 12 are connected to the inner bottom surface of the installation frame 4 at intervals along the circumferential direction. The guide rails 12 correspond to the blocks 7 one by one, and the guide rails 12 are all located directly below the corresponding blocks 7. The T-shaped sliders 13 are slidably connected to the guide rails 12. The T-shaped sliders 13 correspond to the blocks 7 one by one, and the top surfaces of the T-shaped sliders 13 are fixedly connected to the bottom surfaces of the corresponding blocks 7 to guide and support the blocks 7, so as to prevent the telescopic rod 3 from breaking the blocks 7.

[0027] like Fig. 9 As shown, it also includes a connecting seat 14, a rotating rod 15 and a support leg 16. The three connecting seats 14 are connected to the outer side of the cylinder body 1 at intervals along the circumferential direction. The rotating rod 15 is rotatably connected to the connecting seat 14, and the support leg 16 is rotatably connected to the lower end of the rotating rod 15. When the three rotating rods 15 and the support leg 16 are rotated and unfolded, a triangular supporting surface can be formed to support the cylinder body 1; a storage groove 17 is opened at the lower part of the rotating rod 15, so that the support leg 16 can be stored in the storage groove 17 when the support leg 16 is rotated upward and retracted; it also includes a magnet 18, and the magnet 18 is provided in three groups, and the number of magnets 18 in each group is two. The two magnets 18 in the same group are respectively connected to the side of the rotating rod 15 and the outer side of the cylinder body 1, so that when the rotating rod 15 is rotated and retracted, the magnet 18 can fix the position of the rotating rod 15 through magnetic force.

[0028] First, place the hydraulic cylinder at the designated position, and then rotate and unfold the three rotating rods 15 to the side away from the cylinder body 1. The rotating rod 15 can drive the magnets 18 thereon to rotate synchronously, so that the two magnets 18 in the same group can be separated. Then, the support legs 16 can be rotated downward and unfolded, so that the three support legs 16 can all contact the ground. At the same time, the three support legs 16 can cooperate to form a triangular support surface to support the cylinder body 1, thereby ensuring the stability of the hydraulic cylinder during use. Then, the oil inlet pipe 101 is connected to the hydraulic oil, and then the electric control valve 1 is controlled. 1 is opened, and under the action of the electric control valve 11, the oil inlet pipe 101 can deliver the hydraulic oil to the cylinder body 1. As the hydraulic oil in the cylinder body 1 gradually increases, the hydraulic oil in the cylinder body 1 can push the piston 2 and the telescopic rod 3 to rise. When the telescopic rod 3 rises to a suitable height, the electric control valve 11 can be controlled to change the flow direction of the hydraulic oil, so that the hydraulic oil in the oil inlet pipe 101 no longer enters the cylinder body 1. At the same time, the hydraulic oil in the oil inlet pipe 101 can flow into the fixed pipe 5 through the oil delivery pipe 10, the annular oil pipe 8 and the connecting pipe 9. The fixed pipe 5 The hydraulic oil in the cylinder can push the sliding rod 6 and the block 7 to move toward the direction close to the telescopic rod 3, and the block 7 can drive the T-shaped slide block 13 to slide along the guide rail 12. Since the eight groups of blocks 7 are located at different heights, some blocks 7 can be horizontally aligned with the annular groove 301 on the telescopic rod 3, and some blocks 7 cannot be horizontally aligned with the annular groove 301 on the telescopic rod 3. When the block 7 that is not aligned with the annular groove 301 moves to contact with the telescopic rod 3, the block 7 that is not aligned with the annular groove 301 will The movement stops, and the block 7 aligned with the annular groove 301 can continue to move in the direction close to the telescopic rod 3 until the block 7 extends into the annular groove 301, so that the telescopic rod 3 can be locked by the block 7. During the working process of the hydraulic cylinder, the telescopic rod 3 can be prevented from being pressed back into the cylinder body 1 by gravity, thereby avoiding accidents and improving safety; when the block 7 locks the telescopic rod 3, the T-shaped slider 13 can provide support for the bottom surface of the block 7 to prevent the block 7 from breaking when it is subjected to the pressure of the telescopic rod 3.

Claims

1. A hydraulic cylinder with a self-locking function, comprising a cylinder body (1), an oil inlet pipe (101), a piston (2) and a telescopic rod (3), wherein: The invention also comprises a mounting frame (4), a fixed tube (5), a sliding rod (6), a clamping block (7) and a driving assembly. The outer side of the telescopic rod (3) is provided with a plurality of annular clamping grooves (301) at even intervals along the axial direction. The mounting frame (4) is connected to the top surface of the cylinder body (1), and the telescopic rod (3) slides through the middle part of the mounting frame (4). A plurality of fixed tubes (5) are connected to the mounting frame (4) at intervals along the circumferential direction. The sliding rod (6) is slidably connected in the fixed tube (5). The clamping block (7) is fixedly connected to the end of the sliding rod (6). When hydraulic oil enters the cylinder body (1) through the oil inlet pipe (101), the piston (2) and the telescopic rod (3) are pushed to rise. When the telescopic rod (3) rises to a suitable height, the driving assembly can drive the sliding rod (6) to move in a direction close to the telescopic rod (3). The sliding rod (6) can drive the clamping block (7) to move to be clamped in the annular clamping groove (301) to lock the telescopic rod (3).

2. A hydraulic cylinder with self-locking function according to claim 1, characterized in that: The driving assembly comprises an annular oil pipe (8), a connecting pipe (9), an oil delivery pipe (10) and an electric control valve (11). The annular oil pipe (8) is connected to the outside of the mounting frame (4). The connecting pipe (9) is connected to the annular oil pipe (8) and the fixed pipe (5). The electric control valve (11) is mounted on the oil inlet pipe (101). The oil delivery pipe (10) is connected to the annular oil pipe (8) and the electric control valve (11). By switching the flow direction of the hydraulic oil through the electric control valve (11), the hydraulic oil can flow through the oil delivery pipe (10), the annular oil pipe (8), the connecting pipe (9) and the fixed pipe (5) in sequence. The hydraulic oil in the fixed pipe (5) can push the sliding rod (6) to move in a direction close to the telescopic rod (3).

3. A hydraulic cylinder with self-locking function according to claim 1, characterized in that: It also includes guide rails (12) and T-shaped sliders (13), wherein a plurality of guide rails (12) are connected to the inner bottom surface of the mounting frame (4) at intervals along the circumferential direction, and the T-shaped sliders (13) are slidably connected to the guide rails (12). The T-shaped sliders (13) correspond to the clamping blocks (7) one by one, and the top surfaces of the T-shaped sliders (13) are fixedly connected to the bottom surfaces of the corresponding clamping blocks (7) to guide and support the clamping blocks (7).

4. The hydraulic cylinder with self-locking function according to claim 1, characterized in that: It also includes a connecting seat (14), a rotating rod (15) and a support foot (16), wherein the three connecting seats (14) are connected to the outer side of the cylinder body (1) at intervals along the circumferential direction, the rotating rod (15) is rotatably connected to the connecting seat (14), and the support foot (16) is rotatably connected to the end of the rotating rod (15), and when the three rotating rods (15) and the support foot (16) are rotated and unfolded, a triangular support surface can be formed to support the cylinder body (1).

5. A hydraulic cylinder with self-locking function according to claim 4, characterized in that: The rotating rod (15) is provided with a receiving groove (17) so that the supporting leg (16) can be received in the receiving groove (17) when the supporting leg (16) is rotated and retracted.

6. A hydraulic cylinder with self-locking function according to claim 4, characterized in that: It also includes a magnet (18), which is respectively connected to the side of the rotating rod (15) and the outside of the cylinder body (1), so that when the rotating rod (15) is rotated and retracted, the magnet (18) can fix the position of the rotating rod (15) through magnetic force.

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