CN218564393U

CN218564393U - Combined oil seal for crankshaft

Info

Publication number: CN218564393U
Application number: CN202222758920.2U
Authority: CN
Inventors: 胡培基; 刘春阳; 寇贵平; 孟兆恩
Original assignee: Zhejiang Oufu Sealing Parts Co ltd
Current assignee: Zhejiang Oufu Sealing Parts Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-03-03
Anticipated expiration: 2032-10-19

Abstract

The utility model relates to a combined oil blanket for bent axle relates to the technical field of oil blanket, and it includes external seal circle and inner seal circle, be equipped with the exoskeleton in the external seal circle, be equipped with the inner frame in the inner seal circle, the outside of exoskeleton and inner frame is equipped with first rubber protective layer and second rubber protective layer respectively, the side of first rubber protective layer and second rubber protective layer is equipped with first seal lip and second seal lip respectively, and the annular that supplies second rubber protective layer tip male sinks the groove is seted up to the inboard of first rubber protective layer. This application sets up through the dual seal of first seal lip and second seal lip, and interior sealing washer and outer seal ring realize the grafting cooperation of the two through the heavy groove of annular simultaneously to this sealing performance who strengthens this combined oil blanket.

Description

Combined oil seal for crankshaft

Technical Field

The application relates to the technical field of oil seals, in particular to a combined oil seal for a crankshaft.

Background

The oil seal is a sealing element for sealing a rotating shaft in mechanical equipment, and the cavity is basically static, so the oil seal is also called a rotating shaft lip-shaped sealing ring. Since oil enters a friction portion of a machine during operation of the machine, an oil seal is used to prevent the oil from leaking from a gap of the machine, and it is necessary to prevent leakage of water and chemical solution and intrusion of dust and sand from the outside in addition to the oil, and an oil seal is also used in this case.

In the related art, a combined oil seal for an engine rotating shaft comprises a static sealing ring and a dynamic sealing ring, wherein the outer peripheral surface of the static sealing ring is abutted against the inner side wall of an engine cavity and keeps relatively static, the dynamic sealing ring is inserted into the middle of the static sealing ring, and a sealing lip abutted against the engine rotating shaft is arranged on the inner wall of the static sealing ring.

In the related art, the seal lip is worn due to long-term friction between the seal lip and the rotating shaft when in use, and then a gap is formed between the rotating shaft and the seal lip, so that the lubricating oil leaks out, and the sealing effect of the engine is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a combined oil blanket for bent axle solves the problem that the sealed effect of oil blanket seal lip reduces after long-time the use among the above-mentioned correlation technique.

The application provides a combined oil blanket for bent axle adopts following technical scheme:

the utility model provides a combined oil blanket for bent axle, includes external seal circle and inner seal circle, be equipped with outer skeleton in the external seal circle, be equipped with inner frame in the inner seal circle, outer skeleton and inner frame's the outside is equipped with first rubber protective layer and second rubber protective layer respectively, the side of first rubber protective layer and second rubber protective layer is equipped with first seal lip and second seal lip respectively, and the annular heavy groove that supplies second rubber protective layer tip male is seted up to the inboard of first rubber protective layer.

By adopting the technical scheme, the combined oil seal is formed by combining the outer sealing ring and the inner sealing ring, meanwhile, the inner sealing ring and the outer sealing ring realize the insertion fit of the outer sealing ring and the inner sealing ring through the annular sinking groove, wherein the inner wall of the first rubber protective layer is provided with the first sealing lip, the inner wall of the second rubber protective layer is provided with the second sealing lip, and through the double-sealing arrangement of the first sealing lip and the second sealing lip, the possibility of leakage of oil liquid from the gap between the crankshaft and the sealing ring is reduced, so that the sealing performance of the combined oil seal is enhanced.

Optionally, a first spring is arranged on the side surface of the first rubber protective layer, and a first annular groove for embedding the first spring is formed in the side surface of the first sealing lip.

Through adopting above-mentioned technical scheme, at the sealing process to the bent axle, the setting up of first spring makes the lateral surface of first seal lip and bent axle keep conflicting, avoids fluid to ooze from the clearance between first seal lip and the bent axle, further strengthens the sealing performance of outer seal ring.

Optionally, a second spring is arranged on the side surface of the second rubber protective layer, and a second ring groove for embedding the second spring is formed in the side surface of the second sealing lip.

Through adopting above-mentioned technical scheme, through the setting of second spring with correspond the second annular, at the sealing process to the bent axle, make the second seal lip contradict with the lateral surface of bent axle, reduce the installation clearance of second seal lip and bent axle, avoid liquid to ooze from the clearance of second seal lip and bent axle, strengthen the sealing performance of second seal lip.

Optionally, the side of the first sealing lip, which faces away from the first rubber protection layer, is an inclined plane, and the side of the second sealing lip, which faces away from the second rubber protection layer, is an inclined plane.

Through adopting above-mentioned technical scheme, the side of first seal lip and second seal lip is the inclined plane, and the installation of the bent axle of being convenient for of setting up on inclined plane is inserted, improves the packaging efficiency of bent axle and oil blanket.

Optionally, a dust lip is arranged on the side surface of the first seal groove.

Through adopting above-mentioned technical scheme, avoid outside dust or impurity to enter into inside the equipment from the joint gap of interior sealing washer and external seal circle, through the setting of dust lip, prevent that impurity such as dust from entering into inside the equipment cavity to this sealing performance of further reinforcing oil blanket.

Optionally, the outer circumferential surface of the first rubber protection layer is provided with anti-slip threads.

Through adopting above-mentioned technical scheme, the outer peripheral face of first rubber protective layer is contradicted with the inner wall of the cavity of installing, through the setting of protection line, prevents that the inner wall of first rubber protective layer and cavity from taking place relative movement to this further strengthens the installation stability of outer sealing ring.

Optionally, the outer peripheral face of second rubber protective layer is equipped with a plurality of sand grips, confession sand grip male draw-in groove has been seted up to the medial surface of first rubber protective layer.

Through adopting above-mentioned technical scheme, the cooperation setting of sand grip and corresponding draw-in groove, at the equipment in-process of outer seal circle and inner seal circle, inside the sand grip inserts the draw-in groove that corresponds to this reinforcing outer seal circle and inner seal circle's equipment stability avoids driving inner seal circle pivoted condition because of the rotation of bent axle and appears, reinforcing outer seal circle and inner seal circle's connection stability.

Optionally, the raised strips are uniformly distributed around the axis on the outer circumferential surface of the second rubber protective layer.

Through adopting above-mentioned technical scheme, the outside evenly distributed of sealing washer including a plurality of sand grip to this makes the grafting cooperation of inner seal circle and external seal circle more stable, the two equipment stability of reinforcing inner seal circle and external seal circle.

Optionally, a protrusion is arranged on the side surface of the second rubber protective layer, and an annular groove for embedding the protrusion is formed in the inner side wall of the annular sinking groove.

Through adopting above-mentioned technical scheme, the medial surface of second rubber protection layer is provided with annular arch, and sets up on the inside wall in the heavy groove of annular and supply protruding male annular groove, sets up through protruding cooperation with annular groove, further strengthens the equipment stability of inner seal circle and external seal circle.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the double sealing arrangement of the first sealing lip and the second sealing lip, the first sealing lip is arranged on the inner wall of the first rubber protective layer, the second sealing lip is arranged on the inner wall of the second rubber protective layer, and meanwhile, the inner sealing ring and the outer sealing ring are in insertion fit through the annular sinking groove, so that the sealing performance of the combined oil seal is enhanced; through the setting of dustproof lip, prevent that impurity such as dust from entering into inside the equipment cavity to this sealing performance of further reinforcing oil blanket.

2. Through the installation setting of first spring, second spring, make the lateral surface of first seal lip and bent axle contradict, make the lateral surface of second seal lip and bent axle contradict, reduce the installation clearance between the two of first seal lip and second seal lip and the bent axle, avoid liquid to ooze from the clearance of second seal lip and bent axle to this further strengthens the sealing performance of outer seal ring and interior sealing washer.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic illustration of an explosive structure of an embodiment of the present application;

FIG. 3 is a schematic cross-sectional structural view of an embodiment of the present application;

fig. 4 is an enlarged schematic view of a portion a in fig. 3.

In the figure, 1, an outer sealing ring; 11. an outer skeleton; 12. a first rubber protective layer; 121. an annular sinking groove; 122. a card slot; 123. an annular groove; 124. anti-skid lines; 13. a first seal lip; 131. a first ring groove; 14. a dust lip; 15. a first spring; 2. an inner seal ring; 21. an inner skeleton; 22. a second rubber protective layer; 221. a convex strip; 222. a protrusion; 23. a second sealing lip; 231. a second ring groove; 24. a second spring.

Detailed Description

The present application is described in further detail below with reference to all of the figures.

Example (b):

referring to fig. 1, the combined oil seal for the crankshaft comprises an outer sealing ring 1 and an inner sealing ring 2, wherein the outer side surface of the outer sealing ring 1 is in interference fit with the inner side wall of an installed cavity.

Referring to fig. 2 and 3, an L-shaped outer frame 11 is disposed inside the outer sealing ring 1, and the outer frame 11 is made of a rigid material to prevent the outer sealing ring 1 from deforming during rotation of the crankshaft. The outer side of the outer framework 11 is wrapped with a first rubber protective layer 12, the side surface of the first rubber protective layer 12, which is back to the outer framework 11, is provided with a first sealing lip 13 and a dust lip 14, the first sealing lip 13 is used for preventing oil in the cavity from leaking, and the dust lip 14 is used for preventing external impurities or dust from entering the cavity; simultaneously the side of first seal lip 13 is equipped with first spring 15, and first seal lip 13 is close to the side of exoskeleton 11 and has offered the first annular 131 that supplies first spring 15 to put into, makes first seal lip 13 keep conflicting with the surface of bent axle through setting up of first spring 15, strengthens the sealing performance of first seal lip 13. The side surface of the first sealing lip 13, which faces away from the first rubber protective layer 12, is an inclined surface, so that the crankshaft and the outer sealing ring 1 can be conveniently installed in a matched manner.

Referring to fig. 2 and 3, the inner frame 21 of L-shaped is arranged inside the inner seal ring 2, the inner frame 21 is made of rigid material, the outer side of the inner frame 21 is wrapped with the second rubber protection layer 22, the side, opposite to the inner frame 21, of the second rubber protection layer 22 is provided with the second seal lip 23, the side of the second seal lip 23 is provided with the second spring 24, the second ring groove 231 for mounting the second spring 24 is formed in the side, close to the second rubber protection layer 22, of the second seal lip 23, through the arrangement of the second spring 24, the second seal lip 23 is made to be more tightly attached to the outer surface of the crankshaft, and the sealing performance of the second seal lip 23 is enhanced. The side of the second sealing lip 23 facing away from the second rubber protection layer 22 is an inclined surface, which facilitates the assembly of the inner sealing ring 2 and the crankshaft.

Referring to fig. 3, the outer circumferential surface of the first rubber protection layer 12 is provided with anti-slip threads 124, and the anti-slip threads 124 are abutted against the inner wall of the installed cavity, so as to enhance the connection stability between the outer sealing ring 1 and the inner wall of the installed cavity. The first rubber protective layer 12 and the second rubber protective layer 22 are made of flexible rubber materials, the first sealing lip 13, the second sealing lip 23 and the dust lip 14 are of annular structures, the first sealing lip 13, the second sealing lip 23 and the dust lip 14 are made of PTFE materials, and the rubber sealing ring has excellent chemical stability, corrosion resistance, sealing performance, high lubrication non-adhesiveness, electric insulation performance and good ageing resistance.

Referring to fig. 2, four protruding strips 221 are disposed on the outer circumferential surface of the second rubber protection layer 22 along the axial direction, and a slot 122 into which the protruding strips 221 are inserted is disposed on the side surface of the first rubber protection layer 12, so as to enhance the insertion stability between the outer seal ring 1 and the inner seal ring 2.

Referring to fig. 3 and 4, an annular sinking groove 121 for inserting the end of the second rubber protection layer 22 is formed on the inner side of the first rubber protection layer 12; the side surface of the second rubber protection layer 22 is provided with an annular protrusion 222, and the inner side wall of the annular sinking groove 121 is provided with an annular groove 123 for the protrusion 222 to be embedded, so that the insertion fit between the outer sealing ring 1 and the inner sealing ring 2 is more stable.

The implementation principle of the embodiment of the application is as follows:

in the assembling process of the inner seal ring 2 and the outer seal ring 1, the end of the first rubber protection layer 12 is inserted into the corresponding annular groove 121, the protrusion 222 on the side surface of the second rubber protection layer 22 is inserted into the corresponding annular groove 123, and the protrusion 221 is inserted into the corresponding clamping groove 122, so that the inserting stability of the inner seal ring 2 and the outer seal ring 1 is enhanced. Through the double seal setting of first seal lip 13 and second seal lip 23, be equipped with first seal lip 13 on the inner wall of first rubber protective layer 12, be provided with second seal lip 23 on the inner wall of second rubber protective layer 22, interior sealing washer 2 and outer seal ring 1 realize the grafting cooperation of the two through annular heavy groove 121 simultaneously, strengthen this combined oil blanket's sealing performance.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A combined oil seal for a crankshaft comprises an outer sealing ring (1) and an inner sealing ring (2), wherein an outer framework (11) is arranged in the outer sealing ring (1), and an inner framework (21) is arranged in the inner sealing ring (2);

the rubber sealing device is characterized in that the outer side of the outer framework (11) and the outer side of the inner framework (21) are respectively provided with a first rubber protective layer (12) and a second rubber protective layer (22), the side faces of the first rubber protective layer (12) and the second rubber protective layer (22) are respectively provided with a first sealing lip (13) and a second sealing lip (23), and the inner side of the first rubber protective layer (12) is provided with an annular sinking groove (121) for inserting the end part of the second rubber protective layer (22).

2. The combined oil seal for the crankshaft as claimed in claim 1, wherein the first rubber protection layer (12) is provided with a first spring (15) on a side surface thereof, and the first seal lip (13) is provided with a first ring groove (131) on a side surface thereof into which the first spring (15) is inserted.

3. The oil seal of claim 2, wherein a second spring (24) is disposed on a side surface of the second rubber protection layer (22), and a second ring groove (231) for the second spring (24) to be inserted is disposed on a side surface of the second seal lip (23).

4. The combined oil seal for a crankshaft as claimed in claim 1, wherein the side of the first seal lip (13) facing away from the first rubber protection layer (12) is beveled, and the side of the second seal lip (23) facing away from the second rubber protection layer (22) is beveled.

5. The combined oil seal for a crankshaft according to claim 1, wherein a dust lip (14) is provided on the side surface of the first seal lip (13).

6. The oil seal for a combined crankshaft as claimed in claim 1, wherein an outer peripheral surface of said first rubber protector (12) is provided with an anti-slip pattern (124).

7. The combined oil seal for the crankshaft as claimed in claim 1, wherein the second protective rubber layer (22) has a plurality of protruding strips (221) on its outer circumferential surface, and the first protective rubber layer (12) has a plurality of engaging grooves (122) on its inner surface for the protruding strips (221) to be inserted.

8. The combination type oil seal for crankshaft as claimed in claim 7, wherein a plurality of said convex strips (221) are uniformly distributed around the axis on the outer peripheral surface of the second rubber protector (22).

9. The oil seal for combined crankshaft as claimed in claim 1, wherein the second rubber protection layer (22) has a protrusion (222) on its side surface, and the annular sunken groove (121) has an annular groove (123) on its inner side wall for the protrusion (222) to be inserted into.