CN203098461U - Hydraulic cylinder and sealing assembly thereof - Google Patents

Hydraulic cylinder and sealing assembly thereof Download PDF

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Publication number
CN203098461U
CN203098461U CN 201320064444 CN201320064444U CN203098461U CN 203098461 U CN203098461 U CN 203098461U CN 201320064444 CN201320064444 CN 201320064444 CN 201320064444 U CN201320064444 U CN 201320064444U CN 203098461 U CN203098461 U CN 203098461U
Authority
CN
China
Prior art keywords
hydraulic cylinder
piston
ring
seal assembly
oil hydraulic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201320064444
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Chinese (zh)
Inventor
刘青青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LIUYANG FY HYDRAULIC CYLINDER CO Ltd
Original Assignee
LIUYANG FY HYDRAULIC CYLINDER CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LIUYANG FY HYDRAULIC CYLINDER CO Ltd filed Critical LIUYANG FY HYDRAULIC CYLINDER CO Ltd
Priority to CN 201320064444 priority Critical patent/CN203098461U/en
Application granted granted Critical
Publication of CN203098461U publication Critical patent/CN203098461U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a sealing assembly. The sealing assembly is composed of a square sealing ring and more than two O-shaped sealing rings. The O-shaped sealing rings are embedded side by side in the inner side of the square sealing ring in a sleeved mode. The utility model further provides a hydraulic cylinder comprising the sealing assembly. Due to the fact that the hydraulic cylinder is provided with the sealing assembly, under the situation that the sealing performance is guaranteed, multiple small O-shaped sealing rings can be used for replacing an original large O-shaped sealing ring in a ring composed of an O-shaped rubber ring body and a polytetrafluoroethylene ring body. As a result, the overall structure of the hydraulic cylinder is more compact, the outer diameter of the hydraulic cylinder is reduced, and the demands for small-sized multilevel hydraulic cylinders needed by some special installing structures are met.

Description

A kind of oil hydraulic cylinder and seal assembly thereof
Technical field
The utility model belongs to the hydraulic actuator technical field, in particular to a kind of oil hydraulic cylinder and seal assembly thereof.
Background technique
Glais ring is mainly used in the inner carrier of hydraulic pressure industry, the sealing of piston rod, solves leakage and wear problem that relative movement part is arranged under the high-pressure medium situation, also claims " hole combination seal ".Glais ring is made up of a square ring and O-ring seals, and O-ring seals is nested in the square ring inboard.
The general movable sealing structure that adopts two guiding support rings and a Glais ring composition piston of the piston seal of multistage hydraulic cylinder.As shown in Figure 1, the piston movable sealing structure of multistage hydraulic cylinder is made up of guiding support ring 1 ' and Glais ring 2 '.When multistage hydraulic cylinder was the small-sized hydraulic cylinder, first order piston rod 4 ' and second level piston rod 3 ' were one-body molded with piston employing separately.This multistage hydraulic cylinder structure of prior art has reduced the external diameter of oil hydraulic cylinder to a certain extent, but this structure still can not satisfy the demands in some structural configuration.
Practical fresh content
For multistage hydraulic cylinder external diameter in the solution prior art is bigger, still can not satisfy the problem of some structural configuration, the utility model provides a kind of oil hydraulic cylinder and seal assembly thereof, can effectively reduce the external diameter of oil hydraulic cylinder.
One side of the present utility model provides a kind of seal assembly, and the sealing assembly parts is made up of square ring and two above O-ring seals, and described two above O-ring seals are nested in the inboard of described square ring side by side.
Preferably, the quantity of described O-ring seals is two, and the specification of two described O-ring seals is identical.
On the other hand of the present utility model, a kind of oil hydraulic cylinder is provided, the piston seal of this oil hydraulic cylinder adopts above-mentioned seal assembly.
Preferably, described oil hydraulic cylinder is a multistage hydraulic cylinder, is equipped with described seal assembly between every grade of cylinder barrel of described multistage hydraulic cylinder and the piston.
Preferably, also be equipped with at least one guiding support ring between every grade of cylinder barrel of described multistage hydraulic cylinder and the piston, the piston movable sealing structure of the described multistage hydraulic cylinder of the common formation of described guiding support ring and described seal assembly.
Preferably, the quantity of the every grade of cylinder barrel of described multistage hydraulic cylinder and the described guiding support ring of piston is two, and the specification of two described guiding support rings is identical, is distributed in the both sides of described seal assembly.
Preferably, described multistage hydraulic cylinder is the small-sized hydraulic cylinder, and the piston and the piston rod of the one-level at least of described multistage hydraulic cylinder are one-body molded.
Preferably, the progression of described multistage hydraulic cylinder is 3 grades, and described multistage hydraulic cylinder is one-body molded from outside to inside the first order and partial piston and piston rod.
The utility model is owing to adopted novel seal assembly structure, under the situation that guarantees sealability, can replace O-ring seals bigger in the original Glais ring with a plurality of less O-ring seals, thereby make the overall structure of oil hydraulic cylinder compact more, reduced the external diameter of oil hydraulic cylinder, satisfied under some special mounting structure of needs demand the small size multistage hydraulic cylinder.
Other advantages of the present utility model and beneficial effect will elaborate in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and constitutes the part of specification, is used from explanation the utility model with following embodiment one, but should not constitutes restriction of the present utility model.In the accompanying drawings,
Fig. 1 is the sealed structural representation of the oil hydraulic cylinder of prior art;
Fig. 2 is a kind of embodiment's of a seal assembly of the present utility model schematic representation; And
Fig. 3 is the schematic representation of multistage hydraulic cylinder sealing configuration preferred embodiment of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
Be illustrated in figure 2 as the preferred embodiment of compact multi-level hydraulic cylinder sealing structure of the present utility model.Multistage hydraulic cylinder in the present embodiment is 3 grades of nested telescopic hydraulic cylinders, and the movable sealing structure of every grade of piston is made up of two guiding support rings 1 and seal assemblies 2, and two support ring 1 specifications that lead of every joint are identical and be distributed in the both sides of seal assembly 2.As shown in Figure 3, seal assembly 2 is made up of with two identical O-ring seals of specification a square ring 21, two O-ring seals 22 inboards that are nested in square ring 21 side by side.Because the O-ring seals that lattice in the prior art are enclosed changes two less O-ring seals into, for example, with the O-ring seals of the end face diameter 5.3mm O-ring seals that to change two end face diameters into be 3.1mm, the groove depth that lattice enclose on the piston rod adjusts accordingly, also can guarantee the motive sealing performance of oil hydraulic cylinder, can better dwindle the thickness of piston rod and the interval between cylinder barrel and the piston rod, thereby can make the overall structure of multistage hydraulic cylinder compact more, need the less requirement of compact multi-level oil hydraulic cylinder external diameter thereby reach some.
In the present embodiment, under the prerequisite that does not change afterbody piston rod size, the first order piston 4 of multistage hydraulic cylinder and second level piston 3 and separately the one-body molded making of piston rod can further effectively reduce the external diameter of oil hydraulic cylinder.
Because seal assembly is innovated, thus can be under the prerequisite that does not change afterbody piston rod size, it is littler that the external diameter of small-sized hydraulic cylinder is accomplished, with under some special mounting structure of satisfying the demand to the demand of small size multistage hydraulic cylinder.
Be preferred embodiment of the present utility model shown in Fig. 2 ~ 3, those skilled in the art under the situation that satisfies hydraulic pressure motive sealing performance, can carry out various simple distortion or combination in conjunction with common practise, to obtain suitable multistage hydraulic cylinder outside dimension.For example at the inboard nested O-ring seals of identical or different specification more than two of the square ring of seal assembly, in the piston movable sealing structure, adopt the guiding support ring and the seal assembly of identical or different quantity, at least one piston and the one-body molded making of piston rod etc.More than all should be within protection domain of the present utility model.
As long as without prejudice to the thought of the invention, various different embodiments of the present utility model are carried out combination in any, all should be considered as the disclosed content of the utility model.

Claims (8)

1. a seal assembly is characterized in that, the sealing assembly parts is made up of square ring and two above O-ring seals, and described two above O-ring seals are nested in the inboard of described square ring side by side.
2. seal assembly according to claim 1 is characterized in that, the quantity of described O-ring seals is two, and the specification of two described O-ring seals is identical.
3. an oil hydraulic cylinder is characterized in that, the piston seal of this oil hydraulic cylinder adopts the described seal assembly of claim 1 or 2.
4. oil hydraulic cylinder according to claim 3 is characterized in that, described oil hydraulic cylinder is a multistage hydraulic cylinder, is equipped with described seal assembly between every grade of cylinder barrel of described multistage hydraulic cylinder and the piston.
5. oil hydraulic cylinder according to claim 4, it is characterized in that, also be equipped with at least one guiding support ring between every grade of cylinder barrel of described multistage hydraulic cylinder and the piston, the piston movable sealing structure of the described multistage hydraulic cylinder of the common formation of described guiding support ring and described seal assembly.
6. oil hydraulic cylinder according to claim 5 is characterized in that, the quantity of the every grade of cylinder barrel of described multistage hydraulic cylinder and the described guiding support ring of piston is two, and the specification of two described guiding support rings is identical, is distributed in the both sides of described seal assembly.
7. oil hydraulic cylinder according to claim 6 is characterized in that, described multistage hydraulic cylinder is the small-sized hydraulic cylinder, and the piston and the piston rod of the one-level at least of described multistage hydraulic cylinder are one-body molded.
8. oil hydraulic cylinder according to claim 7 is characterized in that, the progression of described multistage hydraulic cylinder is 3 grades, and described multistage hydraulic cylinder is one-body molded from outside to inside the first order and partial piston and piston rod.
CN 201320064444 2013-02-05 2013-02-05 Hydraulic cylinder and sealing assembly thereof Expired - Fee Related CN203098461U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320064444 CN203098461U (en) 2013-02-05 2013-02-05 Hydraulic cylinder and sealing assembly thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320064444 CN203098461U (en) 2013-02-05 2013-02-05 Hydraulic cylinder and sealing assembly thereof

Publications (1)

Publication Number Publication Date
CN203098461U true CN203098461U (en) 2013-07-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320064444 Expired - Fee Related CN203098461U (en) 2013-02-05 2013-02-05 Hydraulic cylinder and sealing assembly thereof

Country Status (1)

Country Link
CN (1) CN203098461U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104314917A (en) * 2014-10-10 2015-01-28 北京机械设备研究所 Local synchronization multistage oil cylinder applicable to heavy load

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104314917A (en) * 2014-10-10 2015-01-28 北京机械设备研究所 Local synchronization multistage oil cylinder applicable to heavy load
CN104314917B (en) * 2014-10-10 2016-06-22 北京机械设备研究所 A kind of suitable in heavy duty local synchronization multi-stage oil cylinder

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130731

Termination date: 20150205

EXPY Termination of patent right or utility model