CN217582685U

CN217582685U - Guide structure of hydraulic cylinder

Info

Publication number: CN217582685U
Application number: CN202221519464.XU
Authority: CN
Inventors: 蔡园; 蔡铮昌; 蔡梦琳
Original assignee: Chongqing Caishi Hydraulic Equipment Co ltd
Current assignee: Chongqing Caishi Hydraulic Equipment Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-10-14
Anticipated expiration: 2032-06-17

Abstract

The utility model discloses a guide structure of pneumatic cylinder specifically includes: the hydraulic cylinder comprises a cylinder body and a piston positioned in the cylinder body, the guide structure comprises a cylinder opening guide part and a piston guide part, the cylinder opening guide part is arranged between the inner wall of a cylinder head of the cylinder body and the outer wall of the piston, and the piston guide part is arranged between the outer wall of a rod head of the piston and the inner wall of the cylinder body; the cylinder opening guide piece comprises a first guide sleeve, a first guide belt, a first sealing piece and a second guide belt, wherein the first guide belt, the first sealing piece and the second guide belt are arranged between the first guide sleeve and the piston and are sequentially arranged along the direction from the cylinder bottom to the cylinder head; the piston guide piece comprises a second guide sleeve, a second sealing piece, a third guide belt, a third sealing piece, a fourth guide belt and a fourth sealing piece which are sequentially arranged from the cylinder bottom to the cylinder opening. The embodiment of the utility model provides an in the scheme that provides, increased first uide bushing and whole guide structure's life, the adaptation provides reliable and stable guide effect for all kinds of pneumatic cylinders.

Description

Guide structure of hydraulic cylinder

Technical Field

The utility model relates to a pneumatic cylinder technical field, in particular to guide structure of pneumatic cylinder.

Background

The hydraulic cylinder is widely applied and is a main execution element of a hydraulic system, and the service life of the hydraulic cylinder directly determines the maintenance interval and period of an action mechanism. In actual production, the hydraulic cylinder has frequent action and complex working condition and bearing stress, so that the hydraulic cylinder has high requirements on the supporting, guiding and sealing functions of the piston.

In general, a hydraulic cylinder is provided with a port guide sleeve at a head of a cylinder body for supporting a piston and guiding and correcting a movement locus thereof. The traditional cylinder mouth guide sleeve material can be selected from cast iron, such as HT20-40 cast iron, and cast iron is easy to generate casting defects, sand holes, air holes, cracks and fractures and has lower tensile strength. Therefore, the existing cylinder opening guide sleeve has a plurality of limitations in manufacturing and using, and lacks of a stable and reliable hydraulic cylinder guide structure with wide applicability.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the present invention provides a guiding structure of a hydraulic cylinder, which overcomes or at least partially solves the above problems, and the technical solution is as follows:

a guide structure of a hydraulic cylinder comprises a cylinder body and a piston positioned in the cylinder body, wherein the guide structure comprises a cylinder opening guide part and a piston guide part, the cylinder opening guide part is arranged between the inner wall of a cylinder head of the cylinder body and the outer wall of the piston, and the piston guide part is arranged between the outer wall of a rod head of the piston and the inner wall of the cylinder body;

the cylinder opening guide piece comprises a first guide sleeve, a first guide belt, a first sealing piece and a second guide belt, wherein the first guide belt, the first sealing piece and the second guide belt are arranged between the first guide sleeve and the piston, and the first guide belt, the first sealing piece and the second guide belt are sequentially arranged from the cylinder bottom to the cylinder head;

the piston guide piece comprises a second guide sleeve, a second sealing piece, a third guide belt, a third sealing piece, a fourth guide belt and a fourth sealing piece which are sequentially arranged from the cylinder bottom to the cylinder opening.

In the above structure, optionally, the cylinder opening guide further includes a fifth sealing member and a third guide sleeve disposed between the first guide sleeve and the piston, and the fifth sealing member and the third guide sleeve are disposed on one side of the first guide belt close to the cylinder bottom and are sequentially disposed along the first guide belt in the direction toward the cylinder bottom.

In the above-described configuration, optionally, the cylinder port guide further includes a sixth sealing member disposed between the first guide sleeve and the cylinder block.

In the above structure, optionally, the first sealing element, the second sealing element and the fourth sealing element are YX-type sealing rings, the third sealing element is a gray ring, the fifth sealing element is a stepped combination sealing ring for a shaft, and the sixth sealing element is an o-type sealing ring.

In the above structure, optionally, the lip of the second sealing member faces the cylinder bottom, and the lip of the fourth sealing member faces the cylinder opening.

In the above structure, optionally, the second guide sleeve is a guide sleeve GF I for the piston rod, and the third guide sleeve is a guide sleeve GFA for the piston.

In the above structure, optionally, the first guide sleeve is a seamless steel tube.

Compared with the prior art, the utility model has the advantages of it is following: the embodiment of the utility model provides an in the scheme that provides, through the setting to jar mouth guide and piston guide structure, increased first uide bushing and whole guide structure's life, the adaptation provides reliable and stable guide effect for all kinds of pneumatic cylinders.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a guiding structure of a hydraulic cylinder according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a guiding structure of a hydraulic cylinder according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a guiding structure of a hydraulic cylinder according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a guiding structure of a hydraulic cylinder according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a guiding structure of a hydraulic cylinder according to an embodiment of the present invention;

wherein, 1-cylinder body; 2-a piston; 3-a cylinder port guide; 4-a piston guide; 301-a first guide strip; 302-a first seal; 303-a second guide belt; 304-a first guide sleeve; 305-a third guide sleeve; 306-a fifth seal; 307-a sixth seal; 401-a second guide sleeve; 402-a second seal; 403-a third belt-wise zone; 404-a third seal; 405-a fourth guide strip; 406-fourth seal.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Referring to fig. 1, the embodiment of the present invention provides a structural schematic diagram of a hydraulic cylinder when a guiding structure of the hydraulic cylinder is applied to the hydraulic cylinder, where the hydraulic cylinder includes a cylinder body 1 and a piston 2 located inside the cylinder body 1. The cylinder body 1 generally comprises a cylinder bottom, a cylinder barrel and a cylinder head, wherein the cylinder bottom is fixedly connected with the cylinder barrel, the cylinder barrel is fixedly connected with the cylinder head, a through hole for installing the piston 2 is formed in the middle of the cylinder head, and the piston 2 extends into the cylinder body from the cylinder head. Referring to fig. 2, showing, the embodiment of the utility model provides a concrete structure schematic diagram of piston 2 among the guide structure of pneumatic cylinder, it is the same, piston 2 also can divide into the three, and fig. 2 is pole head, a pole section of thick bamboo and rod end from a left side to the right side in proper order, and pole head and a pole section of thick bamboo fixed connection, a pole section of thick bamboo and rod end fixed connection, and the pole head part of piston 2 gets into the cylinder body earlier during the use, and the rest parts of piston 2 get into the cylinder body immediately. The cylinder bottom, the cylinder barrel and the cylinder head can be of an integrated structure or can be welded after being manufactured separately, and the rod head, the rod barrel and the rod end can also be of an integrated structure or can be welded after being manufactured separately.

In the structure provided by the embodiment of the utility model, referring to fig. 1, the guiding structure comprises a cylinder opening guiding piece 3 and a piston guiding piece 4, the cylinder opening guiding piece 3 is arranged between the inner wall of the cylinder head of the cylinder body and the outer wall of the piston, the cylinder body and the piston are isolated at the cylinder head, and the cylinder opening guiding piece 3 is always arranged at the cylinder head of the cylinder body when the piston moves; the piston guide member 4 is arranged between the outer wall of the rod head of the piston and the inner wall of the cylinder body, and the piston guide member 4 moves along with the rod head when the piston moves, so that the rod head of the piston is always isolated from the cylinder body.

Referring to fig. 3, a specific structural diagram of a cylinder port guide 3 in a guiding structure of a hydraulic cylinder provided in an embodiment of the present invention is shown, where the cylinder port guide 3 includes a first guide sleeve 304, the first guide sleeve 304 in this application may be regarded as an existing cylinder port guide sleeve described in the background art, the first guide sleeve 304 is disposed between an inner wall of a cylinder head of the cylinder body and an outer wall of the piston, and isolates the cylinder head and the piston of the cylinder body, in order to reduce wear of the first guide sleeve 304 and extend a life of the first guide sleeve 304 when the first guide sleeve 304 is made of a conventional cast iron material, the cylinder port guide 3 provided in an embodiment of the present invention further includes a first guide strip 301, a first sealing member 302, and a second guide strip 303, the first guide strip 301, the first sealing member 302, and the second guide strip 303 are disposed between the first guide sleeve 304 and the piston 3, and the first guide strip 301, the first sealing member 302, and the second guide strip 303 are sequentially disposed from a cylinder bottom to the cylinder head; therefore, when the piston moves, the first guide belt 301, the first sealing element 302 and the second guide belt 303 can also assist in achieving the guiding and isolating shock absorption effects, and the scraping, abrasion and pulling damage to the first guide sleeve 304 caused by the movement of the piston are reduced.

The embodiment of the utility model provides an in the structure, first uide bushing 304 can adopt seamless steel pipe, like the seamless steel pipe of 20/30 model, has avoided the casting defect of cast iron, has better tensile strength, promotes the life of first uide bushing 304.

The embodiment of the utility model provides an in the structure, first sealing member 302 can be selected for YX type sealing washer.

The embodiment of the utility model provides a cylinder mouth guide 3 has still set up first guidance tape 301 and second guidance tape 303 between first uide bushing 304 and piston, utilizes the guidance tape to increase buffering and friction for first uide bushing 304, has increased the life of first uide bushing.

The embodiment of the utility model provides an in the structure, establish piston guide 4 at piston 2's pole head overcoat, piston guide 4 keeps apart piston 2's pole head and cylinder body, see fig. 2, has set up at piston 2's pole head outer wall and has been used for arranging piston guide 4's slot structure, each structure in piston guide 4 corresponds the cover respectively and establishes in corresponding slot structure, refer to fig. 4 and show, the utility model provides a guide structure of hydraulic cylinder in piston guide 4 cover establish the schematic diagram when piston 2's pole head corresponds slot structure, the value explain that fig. 4 gives is the cross-sectional view, and for the ease of explanation, does not show the schematic diagram when piston guide 4 and piston 2's pole head zonulae occludens, but separates piston guide 4 and piston a little by a certain distance, in fact, piston guide 4 is that the pole head that piston 2 corresponds slot structure for inseparable cover is established to piston guide 4, refers to fig. 5 and has given the schematic diagram that piston guide 4 cover establishes in piston 2's pole head corresponds the slot structure. Referring to fig. 4, the piston guide 4 includes a second guide sleeve 401, a second sealing member 402, a third guide strip 403, a third sealing member 404, a fourth guide strip 405, and a fourth sealing member 406, which are arranged in this order from the cylinder bottom toward the cylinder port (i.e., from the rod head toward the rod end).

The embodiment of the utility model provides an in the structure, third sealing member 404 can be selected for the gley circle, second sealing member 402 and fourth sealing member 406 can be selected for YX type sealing washer to optional, the lip limit of second sealing member 402 is towards the cylinder bottom, the lip limit of fourth sealing member 406 is towards the jar mouth, and the sealing action of YX type sealing washer mainly leans on liquid pressure to sticis its lip on the surface of moving part, the utility model provides a structure will be close to the lip limit of the second sealing member 402 of cylinder bottom towards the cylinder bottom, will be close to the lip limit of the fourth sealing member 406 of jar mouth towards the jar mouth, has improved sealed reliability and stability.

In the structure provided by the embodiment of the present invention, referring to fig. 3, the cylinder opening guiding element 3 further includes a first guiding sleeve 304 and a fifth sealing element 306 and a third guiding sleeve 305 between the pistons 2, the fifth sealing element 306 and the third guiding sleeve 305 are disposed on one side of the first guiding strip 301 close to the cylinder bottom, and along the first guiding strip 301 is sequentially disposed toward the cylinder bottom, that is, the first guiding sleeve 304 and the pistons 2 are sequentially disposed between the cylinder bottom toward the cylinder opening, and the third guiding sleeve 305, the fifth sealing element 306, the first guiding strip 301, the first sealing element 302 and the second guiding strip 303 are sequentially disposed along the direction of the cylinder bottom toward the cylinder opening.

The embodiment of the utility model provides an in the structure, it is optional, fifth sealing member 306 is ladder combination sealing washer for the axle, third uide bushing 305 is the uide bushing GFA that the piston was used, second uide bushing 401 is the uide bushing GFI that the piston rod was used, and uide bushing GF I is the uide bushing for the piston rod, plays supporting and guide effect to the piston rod, and uide bushing GFA is the uide bushing for the piston, plays supporting and guide effect to the piston.

In the structure provided by the embodiment of the present invention, referring to fig. 3, the cylinder opening guide 3 further includes a sixth sealing element 307 arranged between the first guide sleeve 304 and the cylinder body 1, optionally, the sixth sealing element 307 is an o-shaped sealing ring.

The embodiment of the utility model provides a structure through the structure setting to jar mouth guide 3 and piston guide 4, has protected traditional jar mouth uide bushing, has prolonged the life of traditional jar mouth uide bushing to the adaptation provides reliable and stable guide effect for all kinds of pneumatic cylinders.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. The guide structure of the hydraulic cylinder comprises a cylinder body and a piston positioned in the cylinder body, and is characterized in that the guide structure comprises a cylinder opening guide part and a piston guide part, the cylinder opening guide part is arranged between the inner wall of a cylinder head of the cylinder body and the outer wall of the piston, and the piston guide part is arranged between the outer wall of a rod head of the piston and the inner wall of the cylinder body;

2. The hydraulic cylinder guide structure according to claim 1, wherein the port guide further includes a fifth seal member and a third guide sleeve provided between the first guide sleeve and the piston, the fifth seal member and the third guide sleeve being provided on a side of the first guide strip close to the cylinder bottom and being arranged in sequence in a direction toward the cylinder bottom along the first guide strip.

3. The hydraulic cylinder guide structure according to claim 2, wherein the port guide further includes a sixth seal member provided between the first guide sleeve and the cylinder body.

4. The hydraulic cylinder guide structure according to claim 3, wherein the first seal, the second seal, and the fourth seal are YX-type seal rings, the third seal is a Glare ring, the fifth seal is a shaft step-combination seal ring, and the sixth seal is an o-type seal ring.

5. The hydraulic cylinder guide structure of claim 4, wherein the lip of the second seal faces the cylinder bottom and the lip of the fourth seal faces the cylinder opening.

6. The hydraulic cylinder guide structure according to claim 2, wherein the second guide sleeve is a piston rod guide sleeve GFI, and the third guide sleeve is a piston rod guide sleeve GFA.

7. The hydraulic cylinder guide structure of claim 1, wherein the first guide sleeve is a seamless steel tube.