CN210769634U - Hydraulic cylinder sealing ring and hydraulic cylinder - Google Patents
Hydraulic cylinder sealing ring and hydraulic cylinder Download PDFInfo
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- CN210769634U CN210769634U CN201921635188.1U CN201921635188U CN210769634U CN 210769634 U CN210769634 U CN 210769634U CN 201921635188 U CN201921635188 U CN 201921635188U CN 210769634 U CN210769634 U CN 210769634U
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Abstract
The utility model discloses a hydraulic cylinder sealing washer relates to the sealed technical field of cylinder body. The piston rod sealing structure comprises an annular metal framework and an elastic sealing body, wherein the annular metal framework comprises a first annular part and a second annular part connected with the first annular part, the outer wall of the first annular part is in interference fit with a cylinder body, and the second annular part is bent towards the direction close to the piston rod; the elastic sealing body comprises an elastic sealing part, a dust lip and a sealing lip, the elastic sealing part is connected to the outer side wall of the second annular part and is in interference fit with the cylinder body, and the dust lip and the sealing lip are attached to the piston rod. According to the arrangement, the outer wall of the first annular part and the elastic sealing part are in interference fit with the cylinder body together, double-acting sealing is achieved, the annular metal framework has high-strength supporting and fixing capacity, and when the cylinder body expands, the elastic sealing part can change along with the change of the size of the cavity of the oil cylinder; thereby solved among the prior art technical problem who produces the clearance easily between metal framework sealing washer and the cylinder body.
Description
Technical Field
The utility model relates to a hydraulic cylinder seals technical field, more specifically says, relates to a hydraulic cylinder sealing washer and hydraulic cylinder.
Background
Common hydraulic cylinder in market includes parts such as cylinder body, piston rod, installs the sealing washer on the piston rod and makes it and hydro-cylinder cooperation, makes the hydro-cylinder cavity be in encapsulated situation, and inside the sealing washer can be fine prevent that external water, pollutant from getting into the hydro-cylinder, avoided sealing system early failure or destruction.
As shown in fig. 1, a metal skeleton sealing ring is used in the existing hydraulic cylinder, the outer diameter of an annular metal skeleton 17 in the metal skeleton sealing ring is in interference fit with a sealing groove on a cylinder body 16 to realize outer side sealing, the inner diameter of the annular metal skeleton 17 is bonded with injection-molded rubber through an adhesive, the injection-molded rubber is provided with a dust lip 18 and a sealing lip 19, the dust lip 18 and the sealing lip 19 form a "<" shape to tightly abut against a piston rod 15 to realize inner side sealing when viewed from a section of the injection-molded rubber, and a cylindrical straight hole 20 is arranged on the sealing lip 19 to discharge trapped pressure between the metal skeleton sealing ring and a cylinder cavity; because the cylinder body 16 can expand under the action of pressure or generate a breathing effect along with the pressure, the inner diameter of the cavity of the oil cylinder is enlarged, and the part of the outer diameter of the annular metal rib 17 in interference fit with the inner diameter of the cavity of the oil cylinder generates a gap, so that external water and pollutants can enter the inside of the oil cylinder through the gap.
Therefore, how to solve the technical problem that a gap is easily generated between the metal framework sealing ring and the cylinder body in the prior art becomes an important technical problem to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydraulic cylinder sealing washer produces the technical problem in clearance easily between metal framework sealing washer and the cylinder body in order to solve prior art. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a hydraulic oil cylinder sealing ring, which comprises an annular metal framework, wherein the annular metal framework is provided with a through hole for a piston rod to pass through, the annular metal framework comprises a first annular part and a second annular part which is connected with the first annular part and forms a bending structure with the first annular part, the outer wall of the first annular part is used for interference fit with a cylinder body, and the second annular part is bent towards the direction close to the piston rod;
the elastic sealing body, the elastic sealing body is including connecting on the lateral wall of second annular part, be used for with cylinder body interference fit's elastic sealing portion, set up the second annular part is close to the dust lip and the seal lip of the one end of piston rod, the dust lip with the seal lip be used for with the piston rod is laminated mutually, just the dust lip with form the recess between the seal lip.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, be provided with on the seal lip and be used for the hydro-cylinder cavity with the tapered hole that the recess is linked together, and along the hydro-cylinder cavity arrives the direction of recess, the bore of tapered hole diminishes by big.
Furthermore, the elastic sealing part, the dust lip and the sealing lip are of an integrated structure and completely coat the inner wall of the first annular part and the whole second annular part.
Further, the first annular portion is parallel to the piston rod, and the second annular portion includes a first folding portion connected to the first annular portion and adjacent to the piston rod in the direction, a second folding portion connected to the first folding portion and parallel to the piston rod, and a third folding portion connected to the second folding portion and bent into a hook shape in the direction adjacent to the piston rod.
Furthermore, the elastic sealing body is made of polyurethane or rubber.
Further, the outer diameter end of the elastic sealing body is provided with a plurality of layers of corrugated bulges in a surrounding mode.
Further, the annular metal framework is a metal ring made of SPCC (steel plate common, cold-rolled steel plate).
Further, a chamfer is arranged at the bottom of the outer wall of the first annular part of the annular metal framework.
Furthermore, the diameter of a large opening of the conical hole is 1.4mm-1.6mm, and the diameter of a small opening of the conical hole is 0.4mm-0.6 mm.
The utility model provides a hydraulic cylinder, including cylinder body, piston rod and hydraulic cylinder sealing washer.
The technical scheme provided by the application comprises the following beneficial effects:
in the technical scheme provided by the utility model, the hydraulic oil cylinder sealing ring comprises an annular metal framework and an elastic sealing body, wherein the annular metal framework comprises a first annular part and a second annular part connected with the first annular part, the outer wall of the first annular part is in interference fit with the cylinder body, and the second annular part is bent towards the direction close to the piston rod; the elastic sealing body comprises an elastic sealing part, a dust lip and a sealing lip, the elastic sealing part is connected to the outer side wall of the second annular part and in interference fit with the cylinder body, the dust lip and the sealing lip are attached to the piston rod, and a groove is formed between the dust lip and the sealing lip. According to the arrangement, the outer wall of the first annular part and the elastic sealing part are in interference fit with the cylinder body together, double-acting sealing is achieved, the annular metal framework has high-strength supporting and fixing capacity, and when the cylinder body expands or generates a breathing effect along with pressure, the elastic sealing part can change along with the change of the size of the cavity of the oil cylinder, so that a good sealing effect is still achieved on the cylinder body; thereby solved among the prior art technical problem who produces the clearance easily between metal framework sealing washer and the cylinder body.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a prior art metal skeleton seal ring installed inside a cylinder body;
FIG. 2 is a schematic view of the overall structure of a sealing ring of a hydraulic cylinder in the embodiment of the present invention;
FIG. 3 is a schematic sectional structure diagram of a sealing ring of a hydraulic oil cylinder in the embodiment of the present invention;
FIG. 4 is a schematic sectional view of an annular metal framework according to an embodiment of the present invention;
fig. 5 is the sectional structure schematic diagram of the hydraulic cylinder sealing ring installed inside the cylinder body in the embodiment of the present invention.
Reference numerals:
1-annular metal skeleton, 2-first annular part, 3-second annular part, 4-elastic sealing body, 5-elastic sealing part, 6-dustproof lip, 7-sealing lip, 8-groove, 9-conical hole, 10-first folding section, 11-second folding section, 12-third folding section, 13-bulge, 14-chamfer, 15-piston rod, 16-cylinder body, 17-annular metal skeleton, 18-dustproof lip, 19-sealing lip and 20-straight hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The purpose of the specific embodiment is to provide a hydraulic oil cylinder sealing ring, the outer wall of the first annular part and the elastic sealing part are in interference fit with a cylinder body together, double-acting sealing is realized, the annular metal framework has high-strength supporting and fixing capacity, and when the cylinder body is expanded or generates a breathing effect along with pressure, the elastic sealing part can change along with the change of the size of a cavity of the oil cylinder, so that a good sealing effect is still realized on the cylinder body; thereby the problem of producing the clearance easily between metal framework sealing washer and the cylinder body among the prior art has been solved.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.
Referring to fig. 2 to 5, the hydraulic cylinder sealing ring provided in this embodiment includes an annular metal framework 1 and an elastic sealing body 4, the annular metal framework 1 is preferably made of SPCC, that is, cold-rolled steel sheet, which has the advantages of no surface scale, good quality, good extensibility, and toughness, and the cold-rolled formed steel allows a cross section to partially flex, the annular metal framework 1 fully utilizes the bearing capacity of the flexed annular metal framework, the annular metal framework 1 includes a first annular portion 2 and a second annular portion 3, the first annular portion 1 and the second annular portion 3 are of an integrated structure, the outer wall of the first annular portion 2 is in interference fit with a cylinder body 16, and the second annular portion 3 is bent toward a direction close to a piston rod 15; the material of elastic sealing body 4 can also be the rubber material for the polyurethane material, these two kinds of materials have certain elasticity at room temperature, can produce deformation when receiving the external pressure of exerting, can the reconversion after detaching external force, elastic sealing body 4 includes elastic sealing portion 5, dust lip 6 and seal lip 7, elastic sealing portion 5 connect on the lateral wall of second annular part 3 and with 16 interference fit of cylinder body, dust lip 6 and seal lip 7 laminate mutually with piston rod 15 and form recess 8 between dust lip 6 and the seal lip 7.
According to the arrangement, the outer wall of the first annular part 2 and the elastic sealing part 5 are in interference fit with the cylinder body 16 together, double-acting sealing is achieved, the annular metal framework 1 has high-strength supporting and fixing capacity, and when the cylinder body 16 expands or generates a breathing effect along with pressure, the elastic sealing part 5 can change along with the change of the size of the cavity of the oil cylinder, so that a good sealing effect is still achieved on the cylinder body 16; thereby the problem that the clearance is easy to generate between the metal framework sealing ring and the cylinder body 16 in the prior art is solved.
As an optional implementation manner, the sealing lip 7 is provided with a tapered hole 9, the cylinder cavity is communicated with the groove 8 through the tapered hole 9, and the caliber of the tapered hole 9 decreases from large to small along the direction from the cylinder cavity to the groove 8. So set up, the design of bell mouth 9 can be discharged the trapped pressure between hydraulic cylinder sealing washer and the hydro-cylinder cavity, has avoided the inside a large amount of trapped pressures that accumulate of hydraulic cylinder to make its inside breakage appear, and the design of bell mouth 9 is similar to the check valve simultaneously, and it is easy to flow from the heavy-calibre toward the small-calibre, nevertheless from the small-calibre toward the heavy-calibre inhale the difficulty, consequently reduces the inside condition of outside pollutant suction hydro-cylinder effectively.
As an alternative embodiment, since the elastic sealing body 4 is of an integral injection-molded structure and is directly bonded to the annular metal framework 1 by an adhesive, the elastic sealing portion 5, the dust lip 6 and the sealing lip 7 are of an integral structure and completely cover the inner wall of the first annular portion 2 and the entire second annular portion 3. So set up, the elastic sealing body 4 of integrated into one piece structure has advantages such as bearing capacity is strong, long service life and be difficult to the seepage, and elastic sealing body 4 can increase the area of contact of elastic sealing body 4 with annular metal framework 1 effectively to annular metal framework 1's large tracts of land cladding, strengthens the two firm degree.
As an alternative embodiment, the first annular portion 2 is parallel to the piston rod 15, the second annular portion 3 comprises a first folding segment 10, a second folding segment 11 and a third folding segment 12, the first folding segment 10 is connected to the first annular portion 2 and is adjacent to the piston rod 15, the second folding segment 11 is connected to the first folding segment 10 and is parallel to the piston rod 15, and the third folding segment 12 is connected to the second folding segment 11 and is bent into a hook shape in a direction adjacent to the piston rod 15. So set up, when elastic sealing portion 5 and cylinder body 16 interference fit, elastic sealing portion 5 can apply a power for cylinder body 16, cylinder body 16 also can apply a reaction force for elastic sealing portion 5 simultaneously, the second section of folding 11 can provide the inside holding power of elastic sealing portion 5 this moment, the better interference fit of elastic sealing portion 5 and cylinder body 16 has been realized, third section of folding 12 is buckled into hook-shaped to the direction that is close to piston rod 15, fine holding power has been provided to the root of dust lip 6 and seal lip 7, reinforcing dust lip 6, the laminating dynamics between seal lip 7 and the piston rod 15.
More specifically, the outer diameter end of the elastic sealing body 4 is provided with a plurality of layers of corrugated protrusions 13. So set up, increased the elasticity and the deformation space of hydraulic cylinder sealing washer, made its and 16 contact surfaces of cylinder body increase simultaneously, formed the sealed effect of multifaceted.
In a more particular embodiment, the bottom of the outer wall of the first annular portion 2 of the annular metal skeleton 1 is provided with a chamfer 14. With the adoption of the arrangement, the stress generated during the heat treatment of the material can be released by the design of the chamfer 14, the internal organization structure is redistributed, cracks are not easy to occur, the deformation is reduced, and meanwhile, the guide positioning effect is realized during the assembly.
In a further embodiment, the diameter of the large opening of the tapered hole 9 is preferably 1.5mm, and the diameter of the small opening of the tapered hole 9 is preferably 0.5 mm. So set up, this taper hole 9 of chi footpath can be with smooth and easy the stranded pressure discharge between hydraulic cylinder sealing washer and the hydro-cylinder cavity, and outside pollutant also is difficult to inhale inside the hydro-cylinder simultaneously.
The embodiment provides a hydraulic oil cylinder, which comprises a cylinder body 16, a piston rod 15 and the hydraulic oil cylinder sealing ring. This embodiment provides a hydraulic cylinder sealing washer among hydraulic cylinder includes outer wall and the elastic sealing portion of first annular part 2 common and 16 interference fit of cylinder body, double-acting seal has been realized, annular metal framework 1 possesses high strength and supports and fixed ability, when cylinder body 16 takes place to rise the jar or produce the respiratory effect along with pressure, elastic sealing portion 5 can change along with the change of hydro-cylinder cavity size, still play fine sealed effect to cylinder body 16, thereby the problem in the prior art that produces the clearance easily between metal framework sealing washer and the cylinder body 16 has been solved. The derivation process of the beneficial effect is substantially similar to the derivation process of the beneficial effect brought by the hydraulic oil cylinder sealing ring, and therefore, the description is omitted here.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a hydraulic cylinder sealing washer which characterized in that includes:
the piston rod structure comprises an annular metal framework (1), wherein the annular metal framework (1) is provided with a through hole for a piston rod (15) to pass through, the annular metal framework (1) comprises a first annular part (2) and a second annular part (3) which is connected with the first annular part (2) and forms a bending structure with the first annular part (2), the outer wall of the first annular part (2) is used for being in interference fit with a cylinder body (16), and the second annular part (3) bends towards the direction close to the piston rod (15);
elastic sealing body (4), elastic sealing body (4) including connect on the lateral wall of second annular portion (3), be used for with cylinder body (16) interference fit's elastic sealing portion (5), set up second annular portion (3) are close to dust lip (6) and seal lip (7) of the one end of piston rod (15), dust lip (6) with seal lip (7) be used for with piston rod (15) laminate mutually, just dust lip (6) with form recess (8) between seal lip (7).
2. The sealing ring of the hydraulic oil cylinder according to claim 1, characterized in that the sealing lip (7) is provided with a tapered hole (9) for communicating the cylinder cavity with the groove (8), and the caliber of the tapered hole (9) decreases from large to small along the direction from the cylinder cavity to the groove (8).
3. Hydraulic ram seal ring according to claim 1, characterised in that the elastic sealing portion (5), the dust lip (6), the sealing lip (7) are of one-piece construction and completely encase the inner wall of the first annular portion (2) and the entire second annular portion (3).
4. Hydraulic ram seal according to claim 1, characterised in that the first annular portion (2) is parallel to the piston rod (15) and the second annular portion (3) comprises a first fold (10) connected to the first annular portion (2) and approaching in the direction of the piston rod (15), a second fold (11) connected to the first fold (10) and approaching in parallel to the piston rod (15), a third fold (12) connected to the second fold (11) and bending in a hook shape approaching in the direction of the piston rod (15).
5. The hydraulic oil cylinder sealing ring according to claim 1, characterized in that the elastic sealing body (4) is made of polyurethane or rubber.
6. Hydraulic ram seal ring according to claim 5, characterised in that the outer diameter end of the elastic sealing body (4) is provided with a plurality of layers of corrugated bulges (13) around it.
7. The sealing ring of the hydraulic oil cylinder according to claim 1, characterized in that the annular metal framework (1) is a metal ring made of SPCC material.
8. Hydraulic oil cylinder sealing ring according to claim 1, characterized in that the bottom of the outer wall of the first annular part (2) of the annular metal skeleton (1) is provided with a chamfer (14).
9. The hydraulic oil cylinder sealing ring according to claim 2, characterized in that the large opening diameter of the conical hole (9) is 1.4mm-1.6mm, and the small opening diameter of the conical hole (9) is 0.4mm-0.6 mm.
10. A hydraulic cylinder comprising a cylinder body (16), a piston rod (15) and a hydraulic cylinder seal ring, characterised in that the hydraulic cylinder seal ring is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921635188.1U CN210769634U (en) | 2019-09-27 | 2019-09-27 | Hydraulic cylinder sealing ring and hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921635188.1U CN210769634U (en) | 2019-09-27 | 2019-09-27 | Hydraulic cylinder sealing ring and hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN210769634U true CN210769634U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921635188.1U Active CN210769634U (en) | 2019-09-27 | 2019-09-27 | Hydraulic cylinder sealing ring and hydraulic cylinder |
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| CN (1) | CN210769634U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111279A (en) * | 2022-08-29 | 2022-09-27 | 万向钱潮股份公司 | Oil seal for universal joint, cross shaft assembly and universal joint |
-
2019
- 2019-09-27 CN CN201921635188.1U patent/CN210769634U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111279A (en) * | 2022-08-29 | 2022-09-27 | 万向钱潮股份公司 | Oil seal for universal joint, cross shaft assembly and universal joint |
| CN115111279B (en) * | 2022-08-29 | 2022-11-11 | 万向钱潮股份公司 | Oil seal for universal joint, cross shaft assembly and universal joint |
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