CN215486973U

CN215486973U - Hydraulic cylinder with dual self-locking function

Info

Publication number: CN215486973U
Application number: CN202120855891.4U
Authority: CN
Inventors: 孙淑琴
Original assignee: Tianjin Maikeer Innovation Technology Co ltd
Current assignee: Tianjin Maikeer Innovation Technology Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2022-01-11
Anticipated expiration: 2031-04-25

Abstract

The utility model discloses a hydraulic cylinder with double self-locking functions, which comprises a cylinder body and a piston rod which are vertically arranged, wherein the top end of the inner wall of the cylinder body is fixedly connected with a horizontally arranged locking ring, the outer ring of the locking ring is sleeved with a horizontally arranged fixing ring, one side of the bottom end of the piston rod penetrates through the cylinder body and the locking ring, the bottom end of the piston rod is fixedly connected with a horizontally arranged piston, the inner ring of the locking ring is provided with two groups of four cavities which are distributed in an annular array, first locking assemblies for fixing the piston rod are arranged in the cavities, and the middle parts of the opposite sides of the inner ring of the fixing ring and the outer ring of the locking ring are respectively provided with four first grooves and four second grooves which are distributed in an annular array. According to the utility model, the buffer spring is arranged, so that the impact force generated when the hydraulic cylinder works is relieved, the hydraulic cylinder is effectively protected, the hydraulic cylinder is prevented from being damaged, and the friction force generated in the moving process of the piston rod is reduced by matching with the arranged roller.

Description

Hydraulic cylinder with dual self-locking function

Technical Field

The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a double self-locking function.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion (or swinging motion), when the hydraulic actuating element is used for realizing the reciprocating motion, a speed reducing device can be omitted, no transmission gap exists, and the hydraulic actuating element moves stably, so the hydraulic actuating element is widely applied to hydraulic systems of various machines, the output force of the hydraulic cylinder is in direct proportion to the effective area of a piston and the pressure difference between the effective area and two sides of the piston, the structural types of the hydraulic cylinder comprise a piston cylinder, a plunger cylinder and a swinging cylinder, the piston cylinder and the plunger cylinder realize the reciprocating linear motion, the output speed and the thrust, and the swinging cylinder realizes the reciprocating swing, the output angular speed (rotating speed) and the torque.

The existing hydraulic cylinder is poor in self-locking effect and low in practicability, does not have an emergency locking function when leakage occurs, easily influences the operation of the hydraulic cylinder, and provides the hydraulic cylinder with dual self-locking functions for improving the self-locking effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a hydraulic cylinder with a double self-locking function.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a hydraulic cylinder with double self-locking functions comprises a cylinder body and a piston rod which are vertically arranged, wherein a horizontally arranged locking ring is fixedly connected to the top end of the inner wall of the cylinder body, a horizontally arranged fixing ring is sleeved on the outer ring of the locking ring, one side of the bottom end of the piston rod penetrates through the cylinder body and the locking ring, a horizontally arranged piston is fixedly connected to the bottom end of the piston rod, two groups of four cavities distributed in an annular array are formed in the inner ring of the locking ring, a first locking assembly used for fixing the piston rod is arranged in each cavity, four first grooves and four second grooves distributed in an annular array are respectively formed in the middle of the opposite side of the inner ring of the fixing ring and the outer ring of the locking ring, the first grooves are communicated with the four second grooves, a second locking assembly used for fixing the piston rod is arranged in each of the four first grooves, and a vertically arranged buffer spring is sleeved on the surface of the piston rod, and the upper end and the lower end of the buffer spring are respectively contacted with the bottom end of the locking ring and the top end of the piston.

Further, the piston is matched with the inner wall of the cylinder body.

Further, the fixing ring and the locking ring are fixed through bolts.

Furthermore, the upper end and the lower end of one side of the outer wall of the cylinder body are respectively provided with a liquid outlet and an L-shaped liquid inlet, the two ends of the liquid outlet and the L-shaped liquid inlet are respectively communicated with the inside and the outside of the cylinder body, and the inner walls of the liquid outlet and the L-shaped liquid inlet are respectively screwed with a vertically-arranged electric one-way valve.

Furthermore, electronic check valve model is V, electronic check valve even has the switch, and the switch even has the power cord.

Further, first locking component includes the T type slider of horizontal placement, the vertical gyro wheel seat of placing of T type slider one end fixedly connected with, and the T type slider other end passes the cavity welding and has the second positioning spring of horizontal placement, T type slider one end and cavity inner wall contact are kept away from to the second positioning spring, the gyro wheel seat is kept away from T type slider one end and is inlayed the gyro wheel that is equipped with vertical placement.

Further, the second locking assembly comprises a plurality of rectangular grooves and a horizontally arranged T-shaped locking block, one end of the T-shaped locking block penetrates through the second groove and is welded with a horizontally arranged first positioning spring, one end of the first positioning spring, far away from the T-shaped locking block, is contacted with the inner wall of the first groove, the section of one side, close to the rectangular groove, of the T-shaped locking block is of a trapezoidal structure, the rectangular groove is formed in the surface of the piston rod and is close to the position of the groove, positioning assemblies are arranged in the rectangular grooves, each positioning assembly comprises a sliding groove formed in the bottom end of the inner wall of the rectangular groove, a vertically arranged sliding rod is connected to the inner wall of the sliding groove in a sliding mode, the top end of the sliding rod is fixedly connected with a horizontally arranged first limiting block, the bottom end of the first limiting block is contacted with the top end of the sliding groove, the section of the first limiting block is of a triangular structure, and a same horizontally arranged third positioning spring is welded between the first limiting block and the rectangular grooves, and the first limiting block is wedged with the T-shaped locking block.

Further, the second locking subassembly includes the T type stopper that bar groove and level were placed, the bar groove is established and is close to groove position department on the piston rod surface, and the tooth piece that bar inslot fixedly connected with a plurality of level was placed, T type stopper one end is passed the second recess and is welded the first positioning spring that the level was placed, and first positioning spring keeps away from the joint between two adjacent tooth pieces of T type stopper one end, the tooth piece is close to bar groove side cross-section and is the trapezium structure.

The utility model has the beneficial effects that:

1. through setting up buffer spring, alleviate the impact force that the pneumatic cylinder during operation produced, play effectual guard action to the pneumatic cylinder, avoid its damage, the gyro wheel that the cooperation set up reduces the frictional force that the piston rod removed the in-process and produces for the lift of piston rod is more smooth and easy, the pneumatic cylinder of further protection, increase of service life.

2. Through setting up second positioning spring and T type slider, play the fixed stay effect to the piston rod, reach preliminary locking purpose, the electronic check valve of cooperation setting, the effectual liquid reflux of avoiding has further guaranteed the purpose of auto-lock, combines L type inlet and the leakage fluid dram that sets up, makes things convenient for the inflow outflow of liquid.

3, through setting up second locking Assembly, when taking place the oil leak phenomenon, provide urgent locking purpose, improved the practicality of pneumatic cylinder and the reliability of its auto-lock.

Drawings

Fig. 1 is a schematic view of a partial three-dimensional explosion structure of a hydraulic cylinder with a dual self-locking function according to the present invention, which includes an embodiment 1;

FIG. 2 is a schematic plan sectional view of an embodiment 1 of a hydraulic cylinder with a dual self-locking function according to the present invention;

fig. 3 is an enlarged schematic structural view of an embodiment 1A of the hydraulic cylinder with a dual self-locking function according to the present invention;

FIG. 4 is a schematic plan sectional view of an embodiment 2 of a hydraulic cylinder with a dual self-locking function according to the present invention;

fig. 5 is an enlarged schematic structural view of an embodiment 2B of a hydraulic cylinder with a dual self-locking function according to the present invention.

In the figure: 1. a first stopper; 2. a fixing ring; 3. a first positioning spring; 4. locking a ring; 5. a second positioning spring; 6. a cylinder body; 7. a piston; 8. an L-shaped liquid inlet; 9. an electric check valve; 10. a buffer spring; 11. a piston rod; 12. a roller; 13. a T-shaped slider; 14. a T-shaped locking block; 15. a roller seat; 16. a slide bar; 17. a third positioning spring; 18. a T-shaped limiting block; 19. a tooth block; 20. a first groove; 21 rectangular slot.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

Referring to fig. 1-3, a hydraulic cylinder with dual self-locking function comprises a cylinder body 6 and a piston rod 11 which are vertically arranged, the top end of the inner wall of the cylinder body 6 is fixedly connected with a locking ring 4 which is horizontally arranged through a bolt, the outer ring of the locking ring 4 is sleeved with a fixing ring 2 which is horizontally arranged, one side of the bottom end of the piston rod 11 penetrates through the cylinder body 6 and the locking ring 4, the bottom end of the piston rod 11 is fixedly connected with a piston 7 which is horizontally arranged through a bolt, two groups of four cavities which are distributed in an annular array are formed in the inner ring of the locking ring 4, first locking assemblies used for fixing the piston rod 11 are arranged in the cavities, four first grooves 20 and four second grooves which are distributed in an annular array are respectively formed in the middle parts of opposite sides of the inner ring of the fixing ring 2 and the outer ring 4, the first grooves 20 are communicated with the four second grooves, and second locking assemblies used for fixing the piston rod 11 are arranged in the four first grooves 20, the surface of the piston rod 11 is sleeved with a vertically placed buffer spring 10, the upper end and the lower end of the buffer spring 10 are respectively contacted with the bottom end of the locking ring 4 and the top end of the piston 7, further, the piston 7 is matched with the inner wall of the cylinder body 6, the buffer spring is arranged to relieve the impact force generated when the hydraulic cylinder works, the hydraulic cylinder is effectively protected to avoid the damage of the hydraulic cylinder, preferably, the fixing ring 2 and the locking ring 4 are fixed through bolts, further, the upper end and the lower end of one side of the outer wall of the cylinder body 6 are respectively provided with a liquid discharge port and an L-shaped liquid inlet 8, the two ends of the liquid discharge port and the L-shaped liquid inlet 8 are respectively communicated with the inside and the outside of the cylinder body 6, the inner walls of the liquid discharge port and the L-shaped liquid inlet 8 are respectively screwed with a vertically placed electric check valve 9, the electric check valve 9 is V3071 in type, the electric check valve 9 is connected with a switch, the switch is connected with a power line, preferably, the first locking assembly comprises a horizontally placed T-shaped slide block 13, one end of a T-shaped sliding block 13 is fixedly connected with a vertically arranged roller seat 15 through a bolt, the other end of the T-shaped sliding block 13 penetrates through a cavity and is welded with a horizontally arranged second positioning spring 5, one end, far away from the T-shaped sliding block 13, of the second positioning spring 5 is contacted with the inner wall of the cavity, one end, far away from the T-shaped sliding block 13, of the roller seat 15 is embedded with a vertically arranged roller 12, the roller is arranged in a matched manner, friction force generated in the moving process of a piston rod is reduced, the piston rod is enabled to ascend and descend more smoothly, the hydraulic cylinder is further protected, the service life is prolonged, through the arrangement of the second positioning spring and the T-shaped sliding block, the piston rod is fixedly supported, the primary locking purpose is achieved, an electric one-way valve is arranged in a matched manner, liquid backflow is effectively avoided, the self-locking purpose is further ensured, an L-shaped liquid inlet and a liquid outlet are combined, liquid inflow and outflow are facilitated, and further, the second locking component comprises a plurality of rectangular grooves 21 and T-shaped locking blocks 14 which are horizontally arranged, one ends of the T-shaped locking blocks 14 penetrate through the second grooves and are welded with first positioning springs 3 which are horizontally arranged, one ends of the first positioning springs 3, far away from the T-shaped locking blocks 14, are contacted with the inner walls of the first grooves 20, the cross sections of the T-shaped locking blocks 14, close to the rectangular grooves 21, are of trapezoidal structures, the rectangular grooves 21 are formed in the surfaces of the piston rods 11, close to the positions of the grooves, and positioning components are arranged in the rectangular grooves, each positioning component comprises a sliding groove formed in the bottom end of the inner wall of the rectangular groove 21, a sliding rod 16 which is vertically arranged is connected with the inner wall of the sliding groove in a sliding mode, the top end of the sliding rod 16 is fixedly connected with a first limiting block 1 which is horizontally arranged through bolts, the bottom end of the first limiting block 1 is contacted with the top end of the sliding groove, the cross section of the first limiting block 1 is of a triangular structure, and a third positioning spring 17 which is horizontally arranged is welded between the first limiting block 1 and the rectangular grooves 21, and the first limiting block 1 is wedged with the T-shaped locking block 14, and the emergency locking purpose is provided by arranging the second locking assembly when the oil leakage phenomenon occurs, so that the practicability of the hydraulic cylinder and the self-locking reliability of the hydraulic cylinder are improved.

The working principle of the embodiment is as follows: firstly, the power supply of the electric one-way valve 9 close to the L-shaped liquid inlet 8 is switched on, the electric one-way valve 9 is opened, liquid is poured into the L-shaped liquid inlet 8, the backflow of the liquid is avoided, a certain locking effect is achieved, under the cooperation of the buffer spring 10, the impact force generated on the locking ring 4 when the piston 7 ascends is relieved, the piston 7 is protected to a certain degree, the piston 7 is pushed to ascend through the continuous introduction of the liquid, the ascending of the piston rod 11 is further driven, the work of the hydraulic cylinder is achieved, meanwhile, the ascending of the piston rod 11 is smoother through the arrangement of the roller 12, the piston rod 11 is also protected, the service life is prolonged, different liquids are introduced according to needs, the ascending of the piston rod 11 at different heights is achieved, when the liquid leakage phenomenon occurs, under the cooperation of the first positioning spring 5 and the T-shaped sliding block 13, the buffer spring 10 is simply limited, the first positioning spring 3 and the third positioning spring 17 are arranged, locking at different height positions is achieved under the matching of the sliding rod 16 and the first limiting block 1, when leakage is avoided, the piston 7 moves downwards under the action of gravity, a good locking purpose is achieved, when the piston rod 11 needs to be reset, the electric one-way valve 9 close to the locking ring 4 is opened, and the piston rod 11 is pressed downwards.

Example 2

Referring to fig. 4-5, this embodiment of a hydraulic cylinder with dual self-locking function is relative to embodiment 1, the main difference lies in this embodiment, the second locking component includes a bar groove and a horizontally placed T-shaped stopper 18, the bar groove is established on the surface of the piston rod 11 and is close to the groove position, and the bar inslot is connected with a plurality of horizontally placed tooth blocks 19 through bolt fixedly, the first positioning spring 3 that the horizontally placed is welded to one end of the T-shaped stopper 18 through the second groove, and the first positioning spring 3 is far away from the joint between two adjacent tooth blocks 19 of one end of the T-shaped stopper 18, the section of one side of the tooth block 19 close to the bar groove is in a trapezoidal structure, through setting the second locking component, when the oil leakage phenomenon occurs, the emergency locking purpose is provided, and the practicability of the hydraulic cylinder and the reliability of self-locking are improved.

The working principle of the embodiment is as follows: firstly, the power supply of the electric one-way valve 9 close to the L-shaped liquid inlet 8 is connected, the electric one-way valve 9 is opened, liquid is poured into the L-shaped liquid inlet 8, backflow of the liquid is avoided, a certain locking effect is achieved, under the cooperation of the buffer spring 10, impact force generated on the locking ring 4 when the piston 7 ascends is relieved, the piston 7 is protected to a certain degree, the piston 7 is pushed to move upwards through continuous introduction of the liquid, the piston rod 11 is further driven to ascend, and therefore the work of the hydraulic cylinder is achieved, meanwhile, the piston rod 11 is enabled to ascend more smoothly through the arrangement of the roller 12, the piston rod 11 is also protected, the service life is prolonged, different liquids are introduced according to needs, upward movement of the piston rod 11 at different heights is achieved, when a liquid leakage phenomenon occurs, under the cooperation of the first positioning spring 5 and the T-shaped sliding block 13, the buffering spring 10 is simply limited, the first positioning spring 3 is arranged, locking at different height positions is achieved under the clamping of the T-shaped limiting block 18 and the tooth block 19, when leakage is avoided, the piston 7 moves downwards under the action of gravity, a good locking purpose is achieved, when the piston rod 11 needs to be reset, the electric one-way valve 9 close to the locking ring 4 is opened, and the piston rod 11 is pressed downwards.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", "first", "second", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present patent application, it is to be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be interpreted broadly, and may be, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed, and the specific meaning of the terms in the patent will be understood by those skilled in the art according to the specific situation.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A hydraulic cylinder with dual self-locking functions comprises a cylinder body (6) and a piston rod (11) which are vertically arranged, and is characterized in that the top end of the inner wall of the cylinder body (6) is fixedly connected with a horizontally arranged locking ring (4), the outer ring of the locking ring (4) is sleeved with a horizontally arranged fixing ring (2), one side of the bottom end of the piston rod (11) penetrates through the cylinder body (6) and the locking ring (4), the bottom end of the piston rod (11) is fixedly connected with a horizontally arranged piston (7), two groups of four cavities distributed in an annular array are formed in the inner ring of the locking ring (4), a first locking assembly used for fixing the piston rod (11) is arranged in each cavity, four first grooves (20) and four second grooves distributed in an annular array are respectively formed in the middle of one opposite side of the inner ring of the fixing ring (2) and the outer ring of the locking ring (4), and the first grooves (20) are communicated with the four second grooves, four all be equipped with the second locking Assembly who is used for fixed piston rod (11) in first recess (20), piston rod (11) surface cover is equipped with vertical buffer spring (10) of placing, and both ends contact with locking ring (4) bottom and piston (7) top respectively about buffer spring (10).

2. Hydraulic cylinder with dual self-locking function according to claim 1, characterized in that the piston (7) is adapted to the inner wall of the cylinder (6).

3. Hydraulic cylinder with dual self-locking function according to claim 2, characterized in that the fixing ring (2) and the locking ring (4) are fixed by bolts.

4. The hydraulic cylinder with the dual self-locking function according to claim 3, wherein a liquid outlet and an L-shaped liquid inlet (8) are respectively formed at the upper end and the lower end of one side of the outer wall of the cylinder body (6), the two ends of the liquid outlet and the L-shaped liquid inlet (8) are respectively communicated with the inside and the outside of the cylinder body (6), and electric one-way valves (9) which are vertically arranged are respectively screwed on the inner walls of the liquid outlet and the L-shaped liquid inlet (8).

5. The hydraulic cylinder with the double self-locking function according to claim 4, wherein the electric one-way valve (9) is V3071, the electric one-way valve (9) is connected with a switch, and the switch is connected with a power line.

6. The hydraulic cylinder with the dual self-locking function according to claim 5, wherein the first locking component comprises a horizontally-arranged T-shaped sliding block (13), one end of the T-shaped sliding block (13) is fixedly connected with a vertically-arranged roller seat (15), the other end of the T-shaped sliding block (13) penetrates through the cavity and is welded with a horizontally-arranged second positioning spring (5), one end, far away from the T-shaped sliding block (13), of the second positioning spring (5) is in contact with the inner wall of the cavity, and a vertically-arranged roller (12) is embedded in one end, far away from the T-shaped sliding block (13), of the roller seat (15).

7. The hydraulic cylinder with the dual self-locking function according to claim 6, wherein the second locking assembly comprises a plurality of rectangular grooves (21) and a horizontally arranged T-shaped locking block (14), one end of the T-shaped locking block (14) penetrates through the second groove and is welded with a horizontally arranged first positioning spring (3), one end of the first positioning spring (3) far away from the T-shaped locking block (14) is in contact with the inner wall of the first groove (20), the cross section of one side of the T-shaped locking block (14) close to the rectangular grooves (21) is of a trapezoid structure, the rectangular grooves (21) are arranged on the surface of the piston rod (11) close to the positions of the grooves, positioning assemblies are arranged in the rectangular grooves and comprise sliding grooves arranged at the bottom ends of the inner walls of the rectangular grooves (21), the inner walls of the sliding grooves are connected with vertically arranged sliding rods (16) in a sliding manner, the top ends of the sliding rods (16) are fixedly connected with horizontally arranged first limiting blocks (1), first stopper (1) bottom contacts with the spout top, and first stopper (1) cross-section is the triangle-shaped structure, the welding has third positioning spring (17) that same level was placed between first stopper (1) and rectangular channel (21), and first stopper (1) carves with T type latch segment (14) and closes.

8. The hydraulic cylinder with the dual self-locking function according to claim 6, wherein the second locking assembly comprises a strip-shaped groove and a T-shaped limiting block (18) placed horizontally, the strip-shaped groove is formed in the surface of the piston rod (11) and is close to the groove position, a plurality of tooth blocks (19) are fixedly connected to the inside of the strip-shaped groove and are placed horizontally, one end of the T-shaped limiting block (18) penetrates through the second groove and is welded with a first positioning spring (3) placed horizontally, the first positioning spring (3) is far away from a clamping joint between two adjacent tooth blocks (19) at one end of the T-shaped limiting block (18), and the section of one side, close to the strip-shaped groove, of the tooth block (19) is of a trapezoidal structure.