CN211144965U

CN211144965U - Hydraulic cylinder capable of effectively preventing fatigue fracture

Info

Publication number: CN211144965U
Application number: CN201922012043.2U
Authority: CN
Inventors: 陈升勇; 武顺; 张忠勇; 庞水平
Original assignee: Huzhou Huanfeng Machinery Co ltd
Current assignee: Huzhou Huanfeng Machinery Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-07-31
Anticipated expiration: 2029-11-20

Abstract

The utility model relates to the technical field of production and manufacturing of hydraulic cylinders, and discloses a hydraulic cylinder capable of effectively preventing fatigue fracture, which comprises a cylinder body, wherein the top of the cylinder body is fixedly connected with an oil inlet pipe, hydraulic oil enters through the oil inlet pipe, a first piston moves rightwards under the action of the hydraulic oil so as to drive a driving rod to move rightwards, a partition plate compresses a first spring and stretches a second spring when the driving rod moves rightwards, then a piston rod is pushed rightwards so as to extend the hydraulic cylinder, when the hydraulic cylinder needs to retract, the hydraulic oil is introduced into an oil return nozzle through an oil return pipe, the second piston and the piston rod move leftwards under the action of the hydraulic oil so as to enable the partition plate to stretch the second spring and compress the first spring, then the driving rod is pushed leftwards, and at the moment, the left hydraulic oil of the first piston is discharged from the oil inlet pipe, has the advantage of effectively preventing fatigue fracture.

Description

Hydraulic cylinder capable of effectively preventing fatigue fracture

Technical Field

The utility model relates to a hydraulic cylinder's production and manufacturing technical field specifically are an effectively prevent fatigue fracture's hydraulic cylinder.

Background

The hydraulic cylinder is an actuating element in a hydraulic transmission system and can convert hydraulic energy into mechanical energy, wherein a hydraulic motor realizes continuous rotary motion, a hydraulic cylinder realizes reciprocating motion, the structural types of the hydraulic cylinder generally comprise three types of piston cylinders, plunger cylinders and swing cylinders, the piston cylinders and the plunger cylinders realize reciprocating linear motion, output speed and thrust, the swing cylinders realize reciprocating swing and output angular velocity and torque, the hydraulic cylinder can be used singly or combined by two or more than two or other mechanisms to complete special functions, the hydraulic cylinder has simple structure and reliable work, so the hydraulic cylinder is widely applied to the hydraulic system of a machine tool, but in the existing hydraulic cylinder, certain defects still exist, for example, when a piston rod of the hydraulic cylinder performs reciprocating work, often can be because the too big problem that takes place fatigue fracture of loading capacity, serious influence hydraulic cylinder's normal work, in case the break-off has not only delayed the job schedule, maintain also unusual trouble, need overhaul hydraulic cylinder, waste time and energy, consequently, how can effectually prevent that hydraulic cylinder from taking place the condition of fatigue fracture, become in order to become a technological problem that awaits a moment and solve.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The not enough to prior art, the utility model provides an effectively prevent fatigue fracture's hydraulic cylinder possesses the advantage that effectively prevents fatigue fracture, has solved the easy fatigue fracture's of hydraulic cylinder piston rod problem.

(II) technical scheme

For the purpose of realizing above-mentioned effective prevention fatigue fracture, the utility model provides a following technical scheme: a hydraulic oil cylinder capable of effectively preventing fatigue fracture comprises a cylinder body, wherein the left side of the cylinder body is fixedly connected with a cylinder bottom, the right side of the cylinder body is fixedly connected with a cylinder cover, the left side of the top of the cylinder body is fixedly connected with an oil inlet pipe, the bottom of the oil inlet pipe is fixedly connected with an installation seat, the right side of the top of the cylinder body is fixedly connected with an oil return nozzle, the outer wall of the oil return nozzle is fixedly connected with an oil return pipe, the inner wall of the cylinder body is movably connected with a first piston, the outer wall of the first piston is fixedly connected with a driving rod, a cavity is formed in the driving rod, the inner wall of the cavity is fixedly connected with a first spring, the right side of the first spring is fixedly connected with a partition plate, the right side of the partition plate is fixedly connected with a cross rod, the outer wall of the, the right side of the outer wall of the piston rod is movably connected with a sealing ferrule, and the right end of the piston rod is fixedly connected with a cylinder head.

Preferably, the oil return pipes are two, the bottom of each oil return pipe is fixedly connected with a mounting seat, the oil inlet pipe and the oil return pipes can be connected to the hydraulic device respectively through the mounting seats, and the stability of hydraulic transmission is further guaranteed.

Preferably, the diameter of the partition plate is larger than the inner diameters of the first spring and the second spring, and the partition plate compresses or stretches the first spring and the second spring when moving left and right without sinking into the first spring and the second spring.

Preferably, the right side of the cavity is provided with a through groove matched with the cross rod, so that the cross rod can extend out of the cavity and is fixedly connected with the piston rod, and the piston rod and the driving rod can stably move synchronously.

Preferably, the sealing ring is fixedly connected to the inner wall of the cylinder body, and the relative position of the piston rod is fixed by fixing the position of the sealing ring, so that the sealing performance in the cylinder body is ensured.

Preferably, the sealing ring is made of composite rubber, the composite rubber has the advantages of being wear-resistant, waterproof, elastic and the like, the sealing performance inside the cylinder body can be guaranteed, and the service life of the hydraulic cylinder is prolonged.

Preferably, the first piston is fixedly connected with the driving rod under the action of a fastening nut, so that the position of the first piston can be fixed, and the first piston is convenient to detach and install.

(III) advantageous effects

Compared with the prior art, the utility model provides an effectively prevent fatigue fracture's hydraulic cylinder possesses following beneficial effect:

1. this effectively prevent fatigue fracture's hydraulic cylinder, get into hydraulic oil through advancing oil pipe, first piston moves under the effect of hydraulic oil, thereby drive the actuating lever and move right, the actuating lever moves right and drives piston rod and second piston and move right, make hydraulic cylinder stretch out, when needs make hydraulic cylinder retract, let in hydraulic oil in to returning oil nozzle through returning oil pipe, the second piston moves left under the effect of hydraulic oil, thereby drive piston rod and actuating lever move left, the left hydraulic oil of first piston is discharged from advancing oil pipe this moment, through advancing oil pipe, first piston, the actuating lever, the piston rod, the second piston, return oil pipe and the cooperation between the oil nozzle and use, thereby reached and can effectively controlled hydraulic cylinder effect that makes a round trip to stretch out and draw back.

This effectively prevent fatigue fracture's hydraulic cylinder, the deformability of actuating lever and piston rod has been increased through the extension of first spring and second spring or compression, when the actuating lever moved right, the first spring of baffle compression and tensile second spring, promote the piston rod again and move right, when the piston rod moved left, the tensile second spring of baffle and the first spring of compression, promote the actuating lever and move left again, moreover the utility model discloses cylinder bottom length among the hydraulic cylinder is greater than traditional cylinder bottom length, can effectively avoid hydraulic cylinder to take place the condition of not hindering, through first spring, the second spring, the actuating lever, the piston rod, cooperation between baffle and the cylinder bottom is used, thereby reached and effectively prevented hydraulic cylinder fatigue fracture's effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1 according to the present invention;

fig. 3 is a top view of the present invention;

fig. 4 is a left side view of the present invention;

fig. 5 is a right side view of the present invention.

In the figure: 1-cylinder body, 2-oil inlet pipe, 3-oil return pipe, 4-oil return nozzle, 5-mounting seat, 6-cylinder bottom, 7-cylinder head, 8-first piston, 9-second piston, 10-piston rod, 11-sealing ferrule, 12-cylinder cover, 13-driving rod, 14-cavity, 15-first spring, 16-partition plate, 17-cross rod and 18-second spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, a hydraulic cylinder for effectively preventing fatigue fracture includes a cylinder body 1, a cylinder bottom 6 fixedly connected to the left side of the cylinder body 1, a cylinder cover 12 fixedly connected to the right side of the cylinder body 1, an oil inlet pipe 2 fixedly connected to the left side of the top of the cylinder body 1, a mounting seat 5 fixedly connected to the bottom of the oil inlet pipe 2, an oil return nozzle 4 fixedly connected to the right side of the top of the cylinder body 1, an oil return pipe 3 fixedly connected to the outer wall of the oil return nozzle 4, two oil return pipes 3, and a mounting seat 5 fixedly connected to the bottom of each of the two oil return pipes 3, the oil inlet pipe 2 and the oil return pipe 3 can be respectively connected to a hydraulic device through the mounting seat 5, further ensuring the stability of hydraulic transmission, a first piston 8 movably connected to the inner wall of the cylinder body 1, a driving rod 13 fixedly connected to the outer wall of the first piston 8, the first, the position of the first piston 8 can be fixed, the disassembly and the assembly are convenient, the cavity 14 is arranged in the driving rod 13, the right side of the cavity 14 is provided with a through groove matched with the cross rod 17, the cross rod 17 can extend out of the cavity 14 to be fixedly connected with the piston rod 10, so that the piston rod 10 and the driving rod 13 can stably and synchronously move, the inner wall of the cavity 14 is fixedly connected with the first spring 15, the right side of the first spring 15 is fixedly connected with the partition plate 16, the diameter of the partition plate 16 is larger than the inner diameters of the first spring 15 and the second spring 18, the partition plate 16 can compress or stretch the first spring 15 and the second spring 18 when moving left and right and cannot sink into the first spring 15 and the second spring 18, the right side of the partition plate 16 is fixedly connected with the cross rod 17, the outer wall of the cross rod 17 is movably connected with the second spring 18, the right side of the cross rod 17 is fixedly connected with the piston, the outer wall right side swing joint of piston rod 10 has sealing ring 11, sealing ring 11 fixed connection is on the inner wall of cylinder body 1, thereby the relative position of piston rod 10 has been fixed through the position of fixing sealing ring 11, the inside leakproofness of cylinder body 1 has been guaranteed, sealing ring 11 is the compound rubber material, the compound rubber material has wear-resisting, waterproof and rich numerous advantages such as elasticity, can enough guarantee the inside leakproofness of cylinder body 1, hydraulic cylinder's life has also been prolonged, the right-hand member fixedly connected with cylinder head 7 of piston rod 10.

The working principle is that hydraulic oil enters through the oil inlet pipe 2, the first piston 8 moves rightwards under the action of the hydraulic oil so as to drive the driving rod 13 to move rightwards, when the driving rod 13 moves rightwards, the partition plate 16 compresses the first spring 15 and stretches the second spring 18, then the piston rod 10 is pushed to move rightwards, the hydraulic oil is extended out, when the hydraulic oil needs to be retracted, the hydraulic oil is introduced into the oil return nozzle 4 through the oil return pipe 3, the second piston 9 moves leftwards under the action of the hydraulic oil so as to drive the piston rod 10 to move leftwards, when the piston rod 10 moves leftwards, the partition plate 16 stretches the second spring 18 and compresses the first spring 15, then the driving rod 13 is pushed to move leftwards, and at the moment, the hydraulic oil on the.

To sum up, the hydraulic oil cylinder capable of effectively preventing fatigue fracture enters hydraulic oil through the oil inlet pipe 2, the first piston 8 moves rightwards under the action of the hydraulic oil, so that the driving rod 13 is driven to move rightwards, the driving rod 13 moves rightwards, the piston rod 10 and the second piston 9 move rightwards, the hydraulic oil cylinder extends out, when the hydraulic oil cylinder needs to be retracted, the hydraulic oil is introduced into the oil return nozzle 4 through the oil return pipe 3, the second piston 9 moves leftwards under the action of the hydraulic oil, so that the piston rod 10 and the driving rod 13 are driven to move leftwards, at the moment, the hydraulic oil on the left side of the first piston 8 is discharged from the oil inlet pipe 2, and the oil inlet pipe 2, the first piston 8, the driving rod 13, the piston rod 10, the second piston 9, the oil return pipe 3 and the oil return nozzle 4; through the tensile or compression of first spring 15 and second spring 18 increased the deformability of actuating lever 13 and piston rod 10, when actuating lever 13 moved right, baffle 16 compressed first spring 15 and tensile second spring 18, promote piston rod 10 again and move right, when piston rod 10 moved left, baffle 16 stretched second spring 18 and compressed first spring 15, promote actuating lever 13 and move left again, moreover the utility model discloses 6 length at the bottom of the cylinder among the hydraulic cylinder is greater than 6 length at traditional bottom of the cylinder, can effectively avoid hydraulic cylinder to take place the condition of not hindering, through first spring 15, second spring 18, actuating lever 13, piston rod 10, the cooperation between baffle 16 and the bottom of the cylinder 6 is used to reached and can effectively prevent hydraulic cylinder fatigue fracture's effect.

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

Claims

1. The utility model provides an effectively prevent fatigue fracture's hydraulic cylinder, includes cylinder body (1), its characterized in that: the cylinder is characterized in that a cylinder bottom (6) is fixedly connected to the left side of the cylinder body (1), a cylinder cover (12) is fixedly connected to the right side of the cylinder body (1), an oil inlet pipe (2) is fixedly connected to the left side of the top of the cylinder body (1), a mounting seat (5) is fixedly connected to the bottom of the oil inlet pipe (2), an oil return nozzle (4) is fixedly connected to the right side of the top of the cylinder body (1), an oil return pipe (3) is fixedly connected to the outer wall of the oil return nozzle (4), a first piston (8) is movably connected to the inner wall of the cylinder body (1), a driving rod (13) is fixedly connected to the outer wall of the first piston (8), a cavity (14) is formed in the driving rod (13), a first spring (15) is fixedly connected to the inner wall of the cavity (14), a partition board (16) is fixedly connected to the right side of, the outer wall swing joint of horizontal pole (17) has second spring (18), the right side fixedly connected with piston rod (10) of horizontal pole (17), the outer wall left side fixedly connected with second piston (9) of piston rod (10), the outer wall right side swing joint of piston rod (10) has sealed lasso (11), the right-hand member fixedly connected with cylinder head (7) of piston rod (10).

2. A hydraulic ram effective in preventing fatigue fractures as claimed in claim 1 wherein: the oil return pipe (3) is provided with two oil return pipes, and the bottoms of the two oil return pipes (3) are fixedly connected with mounting seats (5).

3. A hydraulic ram effective in preventing fatigue fractures as claimed in claim 1 wherein: the diameter of the partition plate (16) is larger than the inner diameters of the first spring (15) and the second spring (18).

4. A hydraulic ram effective in preventing fatigue fractures as claimed in claim 1 wherein: the right side of the cavity (14) is provided with a through groove matched with the cross rod (17).

5. A hydraulic ram effective in preventing fatigue fractures as claimed in claim 1 wherein: the sealing ring (11) is fixedly connected to the inner wall of the cylinder body (1).

6. A hydraulic ram effective in preventing fatigue fractures as claimed in claim 1 wherein: the sealing ring (11) is made of composite rubber.

7. A hydraulic ram effective in preventing fatigue fractures as claimed in claim 1 wherein: the first piston (8) is fixedly connected with the driving rod (13) under the action of a fastening nut.