CN220396162U

CN220396162U - Sealing structure of single-acting hydraulic cylinder

Info

Publication number: CN220396162U
Application number: CN202321826654.0U
Authority: CN
Inventors: 汤志移; 杨收青; 郑召海
Original assignee: Shandong Zhonghao Hydraulic Co ltd
Current assignee: Shandong Zhonghao Hydraulic Co ltd
Priority date: 2023-07-12
Filing date: 2023-07-12
Publication date: 2024-01-26
Anticipated expiration: 2033-07-12

Abstract

The utility model relates to the technical field of hydraulic cylinders and discloses a sealing structure of a single-acting hydraulic cylinder, which comprises a cylinder body, wherein a piston seat is slidably connected to the inner wall of the cylinder body, a piston rod is fixedly connected to the top of the piston seat, a fixing seat is fixedly connected to the top of the cylinder body, an oil pipe is fixedly connected to the bottom end of the outer wall of the cylinder body, a clamping mechanism is sleeved on the outer wall of the oil pipe, and a sealing mechanism is fixedly connected to the top end of the outer wall of the cylinder body. Connect and seal pipeline and oil pipe through fixture, have very big convenient to the change of pipeline simultaneously, saved staff's labour, can improve certain work efficiency, seal the piston seat through sealing mechanism, because the laminating of sealing washer with cylinder body inner wall makes hydraulic oil can not spill, because the long-time use of sealing washer has the condition of wearing and tearing, can change the sealing washer of damage through the change subassembly of this mechanism.

Description

Sealing structure of single-acting hydraulic cylinder

Technical Field

The utility model relates to the technical field of hydraulic cylinders, in particular to a sealing structure of a single-acting hydraulic cylinder.

Background

The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The device has simple structure and reliable operation. When it is used to realize reciprocating motion, it can eliminate speed reducer, and has no transmission clearance and smooth motion, so that it can be widely used in hydraulic systems of various machines.

According to the sealing structure of the hydraulic cylinder disclosed in the patent CN202520948U, the cylinder cover of the hydraulic cylinder comprises a dust-proof ring, supporting rings, a sealing ring, a buffer ring and a sliding shaft sleeve, wherein two supporting rings are symmetrically arranged on two sides of the sealing ring, the cylinder cover of the hydraulic cylinder is provided with a sliding shaft sleeve, and the cylinder cover of the hydraulic cylinder is provided with a retainer ring which is used for fixing the relative position of the sliding shaft sleeve.

According to the oil-conveying pipe sealing device, the two supporting rings are symmetrically arranged on two sides of the sealing ring, so that the stress on two sides of the sealing ring is uniform, the sealing ring is protected, oil leakage is reduced, the situation that the sealing ring is worn after being used for a long time is caused, the oil leakage is caused, the pressure is insufficient, and the oil-conveying pipe sealing device does not seal an oil conveying pipe.

Disclosure of Invention

The utility model aims to provide a sealing structure of a single-acting hydraulic cylinder, so as to solve the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the sealing structure of the single-acting hydraulic cylinder comprises a cylinder body, wherein a piston seat is slidably connected to the inner wall of the cylinder body, a piston rod is fixedly connected to the top of the piston seat, a fixing seat is fixedly connected to the top of the cylinder body, an oil pipe is fixedly connected to the bottom end of the outer wall of the cylinder body, a clamping mechanism is sleeved on the outer wall of the oil pipe, and a sealing mechanism is fixedly connected to the top end of the outer wall of the cylinder body;

the clamping mechanism comprises a clamping assembly and a fixing assembly, the clamping assembly is sleeved on the outer wall of the oil pipe, and the fixing assembly is inserted in the clamping assembly;

the sealing mechanism comprises a sealing assembly and a replacement assembly, the sealing assembly is sleeved on the outer wall of the piston seat, and the replacement assembly is fixedly connected to the outer wall of the fixing seat.

Preferably, the clamping assembly comprises a first groove, the first groove is formed in the outer wall of the oil pipe, an annular clamping plate is sleeved in the first groove, a first connecting plate is fixedly connected to the outer wall of one end of the outer wall of the annular clamping plate, a second connecting plate is fixedly connected to the other end of the outer wall of the annular clamping plate, and a first connecting hole is formed in the front face of the first connecting plate.

Preferably, the first connecting hole penetrates through the first connecting plate and the second connecting plate, the pipeline is inserted into the outer wall of the oil pipe, and the pipeline is clamped through the annular clamping plate.

Preferably, the fixing component comprises a guide rod, the guide rod is inserted into a first connecting hole in the clamping component, the surface of the guide rod is slidably connected with an annular limiting block, the rear end of the guide rod is fixedly connected with a limiting block, a first spring is sleeved between the annular limiting block and the limiting block on the surface of the guide rod, the front end of the guide rod is fixedly connected with a connecting rod, the front end of the guide rod is sleeved with a handle, and the right side of the handle is provided with a second connecting hole.

Preferably, the front surface of the annular limiting block is fixedly connected with the back surface of the second connecting plate in the clamping assembly, the connecting rod is inserted into the second connecting hole, the round center of the handle deviates from the round center of the connecting rod, the handle is rotated, and the annular clamping plate is fastened by using the elastic force of the first spring, so that the pipeline and the oil pipe are tightly attached.

Preferably, the sealing assembly comprises a second groove, the second groove is formed in the outer wall of the piston seat, a sealing ring is sleeved in the second groove, a wear-resistant ring is sleeved on the outer wall of the sealing ring, a check ring is sleeved in the second groove, and a second spring is sleeved on the surface of the piston rod between the piston seat and the fixing seat.

Preferably, the outer wall of the wear-resisting ring is attached to the inner wall of the cylinder body, two check rings are tightly attached to the wear-resisting ring, the wear-resisting ring can prevent the abrasion of the sealing ring, the check rings prevent the sealing ring from falling off in the moving process of the piston rod, accordingly oil leakage is caused, and the second spring gives an elastic force to the piston rod in the moving process of the piston rod, so that the moving efficiency of the piston rod is improved.

Preferably, the replacement assembly comprises a first connecting block, the first connecting block is fixedly connected to the bottom end of the outer wall of the fixed seat, a second connecting block is fixedly connected to the top end of the outer wall of the cylinder body, a threaded hole is formed in the top of the first connecting block, a stud is connected with the threaded hole in a threaded manner, and a rubber gasket is clamped between the bottom of the fixed seat and the top of the cylinder body.

Preferably, the threaded hole penetrates through the bottoms of the first connecting block and the second connecting hole, the stud is rotated to enable the fixing seat to be attached to the cylinder body, the stud is conveyed, the fixing seat can be removed, the piston seat is taken out, and the damaged sealing ring is replaced.

Compared with the prior art, the utility model provides a sealing structure of a single-acting hydraulic cylinder, which has the following beneficial effects:

1. this single-acting hydraulic cylinder's seal structure connects and seals pipeline and oil pipe through fixture, has very big convenient to the change of pipeline simultaneously, has saved staff's labour, can improve certain work efficiency.

2. This single-acting hydraulic cylinder's seal structure seals the piston seat through sealing mechanism, because the laminating of sealing washer and cylinder body inner wall makes hydraulic oil can not spill, because the long-time use of sealing washer has the condition of wearing and tearing, can change the sealing washer of damage through the change subassembly of this mechanism.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art:

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic diagram of a piston seat according to the present utility model;

FIG. 3 is a schematic view of a clamping assembly according to the present utility model;

FIG. 4 is a schematic structural view of a fastening assembly according to the present utility model;

FIG. 5 is a schematic view of a novel construction of the present utility seal assembly;

fig. 6 is a schematic structural view of the replacement assembly of the present utility model.

In the figure: 1. a cylinder; 2. a piston rod; 3. a piston seat; 4. an oil pipe; 5. a clamping mechanism; 51. a clamping assembly; 511. a first trench; 512. an annular clamping plate; 513. a first connection plate; 514. a second connecting plate; 515. a first connection hole; 52. a fixing assembly; 521. a guide rod; 522. an annular limiting block; 523. a limiting block; 524. a first spring; 525. a connecting rod; 526. a grip; 527. a second connection hole; 6. a sealing mechanism; 61. a seal assembly; 611. a second trench; 612. a seal ring; 613. a wear ring; 614. a retainer ring; 615. a second spring; 62. replacing the assembly; 621. a first connection block; 622. a second connection block; 623. a threaded hole; 624. a stud; 625. a rubber gasket; 7. a fixing seat.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model provides the following technical scheme:

example 1

Referring to fig. 1-4, a sealing structure of a single-acting hydraulic cylinder comprises a cylinder body 1, wherein a piston seat 3 is slidably connected to the inner wall of the cylinder body 1, a piston rod 2 is fixedly connected to the top of the piston seat 3, a fixing seat 7 is fixedly connected to the top of the cylinder body 1, an oil pipe 4 is fixedly connected to the bottom end of the outer wall of the cylinder body 1, a clamping mechanism 5 is sleeved on the outer wall of the oil pipe 4, and a sealing mechanism 6 is fixedly connected to the top end of the outer wall of the cylinder body 1;

the clamping mechanism 5 comprises a clamping assembly 51 and a fixing assembly 52, the clamping assembly 51 is sleeved on the outer wall of the oil pipe 4, and the fixing assembly 52 is inserted into the clamping assembly 51.

The clamping assembly 51 comprises a first groove 511, the first groove 511 is formed in the outer wall of the oil pipe 4, an annular clamping plate 512 is sleeved in the first groove, a first connecting plate 513 is fixedly connected to the outer wall of one end of the outer wall of the annular clamping plate 512, a second connecting plate 514 is fixedly connected to the other end of the outer wall of the annular clamping plate 512, and a first connecting hole 515 is formed in the front face of the first connecting plate 513.

The first connection hole 515 penetrates through the first connection plate 513 and the second connection plate 514, the pipeline is inserted into the outer wall of the oil pipe 4, and the pipeline is clamped through the annular clamping plate 512.

The fixing component 52 includes a guide rod 521, the guide rod 521 is inserted into a first connection hole 515 in the clamping component 51, an annular limiting block 522 is slidably connected to a surface of the guide rod 521, a limiting block 523 is fixedly connected to a rear end of the guide rod 521, a first spring 524 is sleeved between the annular limiting block 522 and the limiting block 523 on the surface of the guide rod 521, a connecting rod 525 is fixedly connected to a front end of the guide rod 521, a handle 526 is sleeved at a front end of the guide rod 521, and a second connection hole 527 is provided on a right side of the handle 526.

The front of the annular limiting block 522 is fixedly connected with the back of the second connecting plate 514 in the clamping assembly 51, the connecting rod 525 is inserted into the second connecting hole 527, the round center of the handle 526 is deviated from the round center of the connecting rod 525, the handle 526 is rotated, the annular clamping plate 512 is fastened by the elasticity of the first spring 524, so that the pipeline is tightly attached to the oil pipe 4, the first connecting hole 515 is formed in the front of the first connecting plate 513 and the second connecting plate 514 because the first groove 511 is formed in the outer wall of the oil pipe 4, the oil pipe 4 is sleeved on the outer wall of the pipeline, the annular clamping plate 512 is sleeved on the outer wall of the oil pipe 4 and is clamped in the first groove 511, so that the oil pipe 4 can be clamped, the first connecting plate 513 is fixedly connected with one end outer wall of the annular clamping plate 512, the second connecting plate 514 is fixedly connected with the other end of the outer wall of the annular clamping plate 512, the guide rod 521 is inserted into the first connecting hole 515, the surface of the guide rod 521 is slidably connected with the annular limiting block 522, the front surface of the annular limiting block 522 is fixedly connected with the back surface of the second connecting plate 514 in the clamping assembly 51, the rear end of the guide rod 521 is fixedly connected with the limiting block 523, a first spring 524 is sleeved between the annular limiting block 522 and the limiting block 523 on the surface of the guide rod 521, the front end of the guide rod 521 is fixedly connected with the connecting rod 525, the front end of the guide rod 521 is sleeved with the handle 526, the second connecting hole 527 is formed in the right side of the handle 526, the handle 526 can rotate because the round center of the handle 526 is deviated from the round center of the connecting rod 525, and the annular clamping plate 512 can tightly clamp the oil pipe 4 by using the elastic force of the first spring 524 when the handle 526 rotates, so that the pipe and the oil pipe 4 are fixed.

Example two

Referring to fig. 5-6, on the basis of the first embodiment, the sealing mechanism 6 further includes a sealing assembly 61 and a replacement assembly 62, the sealing assembly 61 is sleeved on the outer wall of the piston seat 3, and the replacement assembly 62 is fixedly connected to the outer wall of the fixed seat 7.

The sealing assembly 61 comprises a second groove 611, the second groove 611 is formed in the outer wall of the piston seat 3, a sealing ring 612 is sleeved in the second groove 611, a wear-resistant ring 613 is sleeved on the outer wall of the sealing ring 612, a retainer ring 614 is sleeved in the second groove 611, and a second spring 615 is sleeved on the surface of the piston rod 2 between the piston seat 3 and the fixed seat 7.

The outer wall of the wear-resisting ring 613 is attached to the inner wall of the cylinder body 1, two check rings 614 are tightly attached to the wear-resisting ring 613, the wear-resisting ring 613 can prevent the abrasion of the sealing ring 612, the check rings 614 prevent the sealing ring 612 from falling off in the moving process of the piston rod 2, so that oil leakage is caused, and the second spring 615 gives the piston rod 2 an elastic force in the moving process of the piston rod 2, so that the moving efficiency of the piston rod 2 is improved.

The replacement assembly 62 comprises a first connecting block 621, and the first connecting block 621 is fixedly connected to the fixing base 7; the outer wall bottom, cylinder body 1 outer wall top fixedly connected with second connecting block 622, screw hole 623 has been seted up at first connecting block 621 top, screw hole 623 internal thread connection has double-screw bolt 624, the centre gripping has rubber gasket 625 between fixing base 7 bottom and the cylinder body 1 top.

Threaded hole 623 penetrates the bottom of first connecting block 621 and the bottom of second connecting hole 527, stud 624 is rotated to make fixing seat 7 and cylinder body 1 fit, stud 624 is sent, fixing seat 7 can be removed, piston seat 3 is taken out, damaged sealing ring 612 is replaced, second groove 611 is provided on the outer wall of piston seat 3, sealing ring 612 is sleeved in second groove 611, sealing ring 612 is tightly fit with the inner wall of cylinder body 1, piston seat 3 is made not leak oil when moving, wear-resisting ring 613 is sleeved on the outer wall of sealing ring 612, wear degree of sealing ring 612 can be reduced, check ring 614 is sleeved in second groove 611, check ring 614 is two and tightly fit with wear-resisting ring 613, check ring 614 prevents sealing ring 612 from falling off in the moving process of piston rod 2, thus oil leakage is caused, the piston rod 2 surface has cup jointed second spring 615 between piston seat 3 and fixing base 7, second spring 615 gives piston rod 2 an elasticity at the in-process of piston rod 2 motion, make the efficiency of piston rod 2 motion improve, fixing base 7 outer wall bottom fixedly connected with first connecting block 621, cylinder body 1 outer wall top fixedly connected with second connecting block 622, screw hole 623 has been seted up at first connecting block 621 top and second connecting block 622 top, screw hole 623 internal thread has double-screw bolt 624, rotate double-screw bolt 624, make fixing base 7 and cylinder body 1 zonulae occludens, because the centre gripping has rubber gasket 625 between fixing base 7 bottom and the cylinder body 1 top, rubber gasket 625 prevents the oil leak, this structure can conveniently change because of the sealing washer 612 of wearing and tearing damage.

In the actual operation process, when the device is used, as the first groove 511 is formed in the outer wall of the oil pipe 4, the oil pipeline 4 is sleeved on the outer wall of the pipeline, the annular clamping plate 512 is sleeved on the outer wall of the oil pipeline 4 and is clamped in the first groove 511, so that the oil pipeline 4 can be clamped, the outer wall of one end of the outer wall of the annular clamping plate 512 is fixedly connected with the first connecting plate 513, the other end of the outer wall of the annular clamping plate 512 is fixedly connected with the second connecting plate 514, the first connecting plate 513 and the front face of the second connecting plate 514 are provided with the first connecting hole 515, a guide rod 521 is inserted in the first connecting hole 515, the surface of the guide rod 521 is connected with the annular limiting block 522 in a sliding manner, the front face of the annular limiting block 522 is fixedly connected with the back face of the second connecting plate 514 in the clamping assembly 51, the rear end of the guide rod 521 is fixedly connected with the limiting block 523, the surface of the guide rod 521 is sleeved with the first spring 524 between the annular limiting block 522 and the limiting block 523, the front end of the guide rod 521 is fixedly connected with the connecting rod 526, the front end of the guide rod 526 is sleeved with the second connecting hole 527, the right side of the grip 526 is provided with the second connecting hole 527, and the second connecting hole 527 is inserted in the second connecting hole 527 is rotatably connected with the second connecting hole 527, the grip 526 can rotate, and the grip 526 can be tightly clamped with the grip handle 4 by the elastic force of the annular clamping bar 526, and the grip 4, and the grip handle 4 can be tightly clamped by the elastic force of the grip handle 526, and the grip 4 can rotate and the grip 4;

the second groove 611 is formed in the outer wall of the piston seat 3, the sealing ring 612 is sleeved in the second groove 611, the sealing ring 612 is tightly attached to the inner wall of the cylinder body 1, so that the piston seat 3 does not leak oil when in motion, the wear-resisting ring 613 is sleeved on the outer wall of the sealing ring 612, the wear degree of the sealing ring 612 can be reduced, the check rings 614 are sleeved in the second groove 611, the two check rings 614 are tightly attached to the wear-resisting ring 613, the check rings 614 prevent the sealing ring 612 from falling off in the motion process of the piston rod 2, thereby causing oil leakage, the second spring 615 is sleeved on the surface of the piston rod 2 between the piston seat 3 and the fixed seat 7, the second spring 615 provides an elastic force for the piston rod 2 in the motion process of the piston rod 2, the motion efficiency of the piston rod 2 is improved, the bottom end of the outer wall of the fixed seat 7 is fixedly connected with the first connecting block 621, the top end of the outer wall of the cylinder body 1 is fixedly connected with the second connecting block 622, the top of the first connecting block 621 and the top of the second connecting block 622 are provided with threaded holes 623, the threaded holes 623 are connected with studs 624 in the threaded holes 623, the studs 624 are rotated, the fixed seat 7 and the cylinder body 1 are tightly connected, and the fixed seat is clamped with the cylinder body 1 due to the rubber 625, and the rubber 625 is clamped between the bottom of the fixed seat 7 and the top of the cylinder body 1, the piston rod is prevented from being damaged by the rubber 625, and the rubber gasket is prevented from being damaged by the rubber sealing ring structure.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Claims

1. The utility model provides a sealing structure of single-acting hydraulic cylinder, includes cylinder body (1), its characterized in that: the cylinder body is characterized in that a piston seat (3) is slidably connected to the inner wall of the cylinder body (1), a piston rod (2) is fixedly connected to the top of the piston seat (3), a fixing seat (7) is fixedly connected to the top of the cylinder body (1), an oil pipe (4) is fixedly connected to the bottom end of the outer wall of the cylinder body (1), a clamping mechanism (5) is sleeved on the outer wall of the oil pipe (4), and a sealing mechanism (6) is fixedly connected to the top end of the outer wall of the cylinder body (1);

the clamping mechanism (5) comprises a clamping assembly (51) and a fixing assembly (52), the clamping assembly (51) is sleeved on the outer wall of the oil pipe (4), and the fixing assembly (52) is inserted in the clamping assembly (51);

the sealing mechanism (6) comprises a sealing assembly (61) and a replacement assembly (62), the sealing assembly (61) is sleeved on the outer wall of the piston seat (3), and the replacement assembly (62) is fixedly connected to the outer wall of the fixed seat (7).

2. The sealing structure of a single-acting hydraulic cylinder according to claim 1, wherein: the clamping assembly (51) comprises a first groove (511), the first groove (511) is formed in the outer wall of the oil pipe (4), an annular clamping plate (512) is sleeved in the first groove, a first connecting plate (513) is fixedly connected to one end of the outer wall of the annular clamping plate (512), a second connecting plate (514) is fixedly connected to the other end of the outer wall of the annular clamping plate (512), and a first connecting hole (515) is formed in the front face of the first connecting plate (513).

3. The sealing structure of a single-acting hydraulic cylinder according to claim 2, wherein: the first connection hole (515) penetrates through the first connection plate (513) and the second connection plate (514).

4. The sealing structure of a single-acting hydraulic cylinder according to claim 1, wherein: the fixing assembly (52) comprises a guide rod (521), the guide rod (521) is inserted into a first connecting hole (515) in the clamping assembly (51), an annular limiting block (522) is connected to the surface of the guide rod (521) in a sliding mode, a limiting block (523) is fixedly connected to the rear end of the guide rod (521), a first spring (524) is sleeved between the annular limiting block (522) and the limiting block (523) on the surface of the guide rod (521), a connecting rod (525) is fixedly connected to the front end of the guide rod (521), a handle (526) is sleeved at the front end of the guide rod, and a second connecting hole (527) is formed in the right side of the handle (526).

5. The sealing structure of a single-acting hydraulic cylinder according to claim 4, wherein: the front surface of the annular limiting block (522) is fixedly connected with the back surface of a second connecting plate (514) in the clamping assembly (51), the connecting rod (525) is inserted into a second connecting hole (527), and the circular center of the handle (526) deviates from the circular center of the connecting rod (525).

6. The sealing structure of a single-acting hydraulic cylinder according to claim 1, wherein: the sealing assembly (61) comprises a second groove (611), the second groove (611) is formed in the outer wall of the piston seat (3), a sealing ring (612) is sleeved in the second groove (611), a wear-resistant ring (613) is sleeved on the outer wall of the sealing ring (612), a retainer ring (614) is sleeved in the second groove (611), and a second spring (615) is sleeved on the surface of the piston rod (2) between the piston seat (3) and the fixed seat (7).

7. The sealing structure of a single-acting hydraulic cylinder according to claim 6, wherein: the outer wall of the wear-resistant ring (613) is attached to the inner wall of the cylinder body (1), and two check rings (614) are tightly attached to the wear-resistant ring (613).

8. The sealing structure of a single-acting hydraulic cylinder according to claim 7, wherein: the replacement assembly (62) comprises a first connecting block (621), the first connecting block (621) is fixedly connected to the bottom end of the outer wall of the fixed seat (7), a second connecting block (622) is fixedly connected to the top end of the outer wall of the cylinder body (1), a threaded hole (623) is formed in the top of the first connecting block (621), a stud (624) is connected to the threaded hole (623) in a threaded mode, and a rubber gasket (625) is clamped between the bottom of the fixed seat (7) and the top of the cylinder body (1).

9. The sealing structure of a single-acting hydraulic cylinder according to claim 8, wherein: the threaded hole (623) penetrates through the bottoms of the first connecting block (621) and the second connecting hole (527).