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, which comprises a cylinder barrel, a piston plate is slidably sleeved in the cylinder barrel, and a movable rod is fixedly connected to the top of the piston plate. According to the utility model, after the hydraulic cylinder finishes working, the piston plate retracts to the bottom of the cylinder barrel, so that the fixed seat at the bottom of the piston plate is driven to be in butt joint with the butt joint column for insertion, then the fixed seat abuts against the locking block and retracts into the butt joint column, then the extrusion spring extrudes the lifting seat to rise, and the lifting seat drives the linkage rod to rotate; the end of the linkage rod can drive the L-shaped rod to slide on the cylinder barrel, the locking block can be driven to be inserted into the clamping groove through the end of the L-shaped rod, the piston plate and the movable rod can be locked through the locking block, the movable rod is prevented from stretching out due to external force, and the locking effect on the movable rod and the piston plate is improved. In this way, the problem that when the hydraulic cylinder is used, accidents happen, the movable rod stretches out, and people are injured can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder technical field, specifically a kind of hydraulic cylinder with self-locking function. BACKGROUND

[0002] Hydraulic cylinder is a kind of hydraulic energy conversion into mechanical energy, carries out linear reciprocating motion (or swing movement) hydraulic actuator. Hydraulic cylinder is composed of a sealed cylinder and a piston. When hydraulic cylinder is connected to high-pressure liquid, liquid enters the cylinder by oil inlet, and pushes the piston to move to one side. This pressure is transmitted through the surface of the piston in contact with the working object, causing it to generate force. When the liquid is discharged through the oil outlet, the piston will return to the initial position.

[0003] After long time use, the overall sealing performance of hydraulic cylinder will decrease, thereby causing hydraulic oil leakage, when piston rod is finished work and retracted into cylinder barrel, it can still move outward under the interference of external force, and the self-locking function failure of hydraulic cylinder can easily lead to the damage of cylinder body. SUMMARY

[0004] The utility model aims at providing a kind of hydraulic cylinder with self-locking function to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of hydraulic cylinder with self-locking function, including cylinder barrel, the inside of cylinder barrel is slidably sleeved with piston plate, the top of piston plate is fixedly connected with movable rod, the top of movable rod is fixedly connected with movable ring, the bottom center position of piston plate is fixedly connected with fixed seat, the fixed seat is slidably sleeved with butt joint column, the butt joint column is provided with sliding slot, the sliding slot is slidably connected with L-shaped rod, the top of L-shaped rod is fixedly connected with locking block, one end of the linkage rod is rotatably connected with the end of L-shaped rod, the other end of linkage rod is rotatably connected with lifting seat, the bottom of lifting seat is fixedly connected with limiting column, the bottom end of limiting column is fixedly connected with hydraulic block, the outer wall of cylinder barrel is fixedly connected with oil outlet pipe.

[0007] Further, the bottom of cylinder barrel is fixedly connected with bottom sealing plate, the butt joint column is fixedly connected with bottom sealing plate, and the bottom of bottom sealing plate is fixedly connected with connecting seat.

[0008] Further, the top of cylinder barrel is provided with cover plate, a plurality of fixed bolts are rotatably connected with cylinder barrel at equal distances on the cover plate, the outer part of cover plate is fixedly sleeved with sealing ring, and the bottom of cover plate is fixedly connected with sealing ring.

[0009] Further in, the outer sliding sleeve of the hydraulic block is sleeved with a vertical pipe, the bottom end of the vertical pipe is fixedly connected with a communicating pipe which is communicated with the inside of the vertical pipe, the communicating pipe is fixedly connected with the cylinder barrel, the outer wall of the vertical pipe is fixedly connected with an oil inlet pipe which is communicated with the vertical pipe, the outside of the communicating pipe is sleeved with a protective cover which is fixedly connected with the outer wall of the cylinder barrel.

[0010] Further in, the fixed seat is provided with a clamping groove which is clamped with the locking block.

[0011] Further in, the outer part of the limiting column is sleeved with an extrusion spring which is fixedly connected with the lifting seat.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1、When the hydraulic cylinder is finished, the piston plate will be retracted to the bottom of the cylinder barrel, so as to drive the fixed seat and the butt joint column at the bottom of the piston plate to be inserted, then the fixed seat will drive the locking block to shrink into the butt joint column, then the extrusion spring will extrude the lifting seat to rise, the lifting seat drives the linkage rod to rotate, so that the end of the linkage rod will drive the L-shaped rod to slide on the cylinder barrel, and the end of the L-shaped rod will drive the locking block to be inserted into the clamping groove, so that the locking block can lock the piston plate and the movable rod, prevent the movable rod from being stretched out due to external force, and improve the locking effect of the movable rod and the piston plate, so as to avoid the problems such as the stretching out of the movable rod and the injury of personnel caused by accidents when the hydraulic cylinder is used.

[0014] 2、The hydraulic oil is introduced into the oil inlet pipe, the hydraulic oil will drive the hydraulic block to descend, so that the hydraulic block will drive the limiting column to slide into the vertical pipe, the limiting column drives the lifting seat to descend, then the linkage rod will drive the L-shaped rod to move to the direction of the cylinder barrel, so that the L-shaped rod can drive the locking block at the top to be separated from the clamping groove, so that the piston plate will lose the locking, and the hydraulic block is pressed into the communicating pipe by the oil pressure, so that the vertical pipe and the communicating pipe are communicated, so that the hydraulic oil will enter into the inside of the cylinder barrel through the communicating pipe, so that the movable rod can be stretched out, so that the hydraulic cylinder can be normally used when the oil is not introduced and the locking can be cancelled immediately when the oil is introduced into the cylinder barrel. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic diagram of the utility model;

[0016] Figure 2 It is the internal structure schematic diagram of the cylinder barrel in the utility model;

[0017] Figure 3 It is the overall bottom end cross section structure schematic diagram in the utility model;

[0018] Figure 4 It is the top end structure schematic diagram of the piston rod in the utility model.

[0019] In the figure: 101, cylinder barrel; 102, bottom plate; 103, connecting seat; 104, piston plate; 105, movable rod; 106, movable ring; 107, protective cover; 108, oil outlet pipe; 109, cover plate; 110, sealing ring; 111, fixed bolt; 112, sealing ring; 201, fixed seat; 202, butt joint column; 203, sliding groove; 204, locking block; 205, L-shaped rod; 206, linkage rod; 207, lifting seat; 208, limiting column; 209, hydraulic block; 210, vertical pipe; 211, extrusion spring; 212, oil inlet pipe; 213, communication pipe; 214, clamping groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Please refer to Figures 1-4 In the embodiments of the utility model, a hydraulic cylinder with self-locking function comprises a cylinder barrel 101, a piston plate 104 is slidably sleeved in the cylinder barrel 101, a movable rod 105 is fixedly connected to the top of the piston plate 104, a movable ring 106 is fixedly connected to the top end of the movable rod 105, a fixed seat 201 is fixedly connected to the bottom center position of the piston plate 104, a butt joint column 202 is slidably sleeved in the fixed seat 201, a sliding groove 203 is formed in the butt joint column 202, an L-shaped rod 205 is slidably connected in the sliding groove 203, a locking block 204 is fixedly connected to the top end of the L-shaped rod 205, one end of a linkage rod 206 is rotatably connected to the end of the L-shaped rod 205, the other end of the linkage rod 206 is rotatably connected to a lifting seat 207, a limiting column 208 is fixedly connected to the bottom of the lifting seat 207, a hydraulic block 209 is fixedly connected to the bottom end of the limiting column 208, an oil outlet pipe 108 is fixedly connected to the outer wall of the cylinder barrel 101; the bottom end of the cylinder barrel 101 is fixedly connected with a bottom plate 102, the butt joint column 202 is fixedly connected with the bottom plate 102, the bottom of the bottom plate 102 is fixedly connected with a connecting seat 103; a clamping groove 214 for clamping the locking block 204 is formed in the fixed seat 201; an extrusion spring 211 fixedly connected with the lifting seat 207 is sleeved outside the limiting column 208.

[0022] Specifically, after the hydraulic cylinder finishes working, the piston plate 104 retracts to the bottom of the cylinder 101, which causes the fixed seat 201 and the docking post 202 at the bottom of the piston plate 104 to engage and insert. Then, the fixed seat 201 abuts against the locking block 204 and retracts into the docking post 202. Then, the compression spring 211 compresses the lifting seat 207 to rise. The lifting seat 207 drives the linkage rod 206 to rotate, so that the end of the linkage rod 206 drives the L-shaped rod 205 to slide on the cylinder 101. The end of the L-shaped rod 205 drives the locking block 204 to insert into the snap-fit ​​groove 214. Therefore, the locking block 204 can lock the piston plate 104 and the movable rod 105, preventing the movable rod 105 from being extended by external force. By improving the locking effect on the movable rod 105 and the piston plate 104, it is possible to avoid accidents that may occur when using the hydraulic cylinder, such as the movable rod 105 extending and causing personal injury.

[0023] Example 1

[0024] like Figure 3 As shown, in this embodiment, a vertical pipe 210 is slidably sleeved on the outside of the hydraulic block 209. The bottom end of the vertical pipe 210 is fixedly connected to a connecting pipe 213 that communicates with its interior. The connecting pipe 213 is fixedly connected to the cylinder 101. An oil inlet pipe 212 that communicates with the vertical pipe 210 is fixedly connected to the outer wall of the vertical pipe 210. A protective cover 107 that is fixedly connected to the outer wall of the cylinder 101 is sleeved on the outside of the connecting pipe 213.

[0025] In this embodiment, hydraulic oil is introduced through the oil inlet pipe 212. The hydraulic oil presses the hydraulic block 209 down, which in turn drives the limiting post 208 to slide into the vertical pipe 210. The limiting post 208 drives the lifting seat 207 down, and then the linkage rod 206 drives the L-shaped rod 205 to move towards the cylinder 101. The L-shaped rod 205 can drive the locking block 204 at the top to disengage from the locking groove 214, so that the piston plate 104 loses its lock. At the same time, the hydraulic block 209 is pressed into the connecting pipe 213 by the oil, so that the vertical pipe 210 and the connecting pipe 213 are connected. Hydraulic oil can then enter the cylinder 101 through the connecting pipe 213, which allows the movable rod 105 to extend. In this way, the hydraulic cylinder remains locked when no oil is introduced and can be immediately unlocked when oil is introduced into the cylinder 101, so that the hydraulic cylinder can be used normally.

[0026] Example 2

[0027] like Figure 4 As shown, in this embodiment, a cover plate 109 is provided on the top of the cylinder 101. A plurality of fixing bolts 111 that are screwed into the cylinder 101 are circumferentially screwed onto the cover plate 109. A closing ring 110 is fixedly sleeved on the outside of the cover plate 109. A sealing ring 112 is fixedly connected to the bottom of the cover plate 109.

[0028] In the embodiment, the sealing effect of the hydraulic cylinder is improved by arranging a cover plate 109 on the top of the cylinder barrel 101, the cover plate 109 is fixed on the top of the cylinder barrel 101 by a plurality of fixing bolts 111, and the sealing effect of the hydraulic cylinder is improved by arranging a sealing ring 112 at the center position of the cover plate 109 and a closing ring 110 sleeved outside the cover plate 109, so that the leakage of hydraulic oil is prevented.

[0029] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0030] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A hydraulic cylinder having a self-locking function, characterized by comprising: The application relates to a cylinder device, which comprises a cylinder (101), the inside of the cylinder (101) being sleeved with a piston plate (104), the top of the piston plate (104) being fixedly connected with a movable rod (105), the top end of the movable rod (105) being fixedly connected with a movable ring (106), the bottom center of the piston plate (104) being fixedly connected with a fixed seat (201), the fixed seat (201) being sleeved with a butt joint column (202) in a sliding mode, the butt joint column (202) being provided with a sliding groove (203), the sliding groove (203) being connected with an L-shaped rod (205) in a sliding mode, the top end of the L-shaped rod (205) being fixedly connected with a locking block (204), one end of the L-shaped rod (205) being rotatably connected with a linkage rod (206), the other end of the linkage rod (206) being rotatably connected with a lifting seat (207), the bottom of the lifting seat (207) being fixedly connected with a limiting column (208), the bottom end of the limiting column (208) being fixedly connected with a hydraulic block (209), and the outer wall of the cylinder (101) being fixedly connected with an oil outlet pipe (108).

2. The hydraulic cylinder with self-locking function according to claim 1, characterized in that, The bottom end of the cylinder (101) is fixedly connected with a bottom sealing plate (102), the butt joint column (202) is fixedly connected with the bottom sealing plate (102), and the bottom of the bottom sealing plate (102) is fixedly connected with a connecting seat (103).

3. The hydraulic cylinder with self-locking function according to claim 2, characterized in that, The top of the cylinder (101) is provided with a cover plate (109), a plurality of fixed bolts (111) are rotatably connected with the cover plate (109) in an annular and equidistant mode, the outer portion of the cover plate (109) is sleeved with a sealing ring (110), and the bottom of the cover plate (109) is fixedly connected with a sealing ring (112).

4. The hydraulic cylinder with self-locking function according to claim 3, characterized in that, The outer portion of the hydraulic block (209) is sleeved with a vertical pipe (210), the bottom end of the vertical pipe (210) is fixedly connected with a communicating pipe (213) which is in communication with the inside of the vertical pipe (210), the communicating pipe (213) is fixedly connected with the cylinder (101), the outer wall of the vertical pipe (210) is fixedly connected with an oil inlet pipe (212) which is in communication with the vertical pipe (210), and the outer portion of the communicating pipe (213) is sleeved with a protective cover (107) which is fixedly connected with the outer wall of the cylinder (101).

5. The hydraulic cylinder with self-locking function according to claim 4, characterized in that, The fixed seat (201) is provided with a clamping groove (214) which is clamped with the locking block (204).

6. The hydraulic cylinder with self-locking function according to claim 5, characterized in that, The outer portion of the limiting column (208) is sleeved with an extrusion spring (211) which is fixedly connected with the lifting seat (207).

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