CN212839393U

CN212839393U - Durable crankshaft oil seal

Info

Publication number: CN212839393U
Application number: CN202021704469.0U
Authority: CN
Inventors: 胡志根; 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: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-03-30
Anticipated expiration: 2030-08-14

Abstract

The utility model relates to the technical field of sealing elements, and aims to provide a durable crankshaft oil seal, which comprises a rubber body, wherein a framework is embedded on the rubber body, the rubber body comprises a main lip and a dustproof lip, the main lip comprises a first lip and a second lip which are arranged at intervals along the axial direction of the rubber body, and a groove is formed between the first lip and the second lip; the utility model discloses a setting of first lip, second lip and recess prevents that the interior lubricating oil mass of main lip is not enough and outside dust from invading main lip, makes main lip reducing wear, keeps good leakproofness.

Description

Durable crankshaft oil seal

Technical Field

The utility model relates to a sealing member technical field, in particular to durable bent axle oil blanket.

Background

The engine of the automobile is a heart part of the automobile, the crankshaft of the engine is a main rotating part, and the crankshaft needs to work in a sealed environment containing lubricating oil when working, so that when the crankshaft is installed, in order to prevent lubricating oil from leaking, the shaft end needs to be sealed by an oil seal, and the part of the crankshaft which needs lubricating oil is isolated from a power transmission part, so that the lubricating oil is prevented from leaking.

The prior art Chinese patent document with the publication number of CN208057942U discloses a crankshaft front oil seal and a mounting structure thereof, the crankshaft front oil seal comprises a cylindrical seat body which is provided with an upper opening and a lower opening and is used for being matched with an engine cylinder body, an annular elastic body is arranged on the inner side of the lower part of the cylindrical seat body, an annular main lip and an annular auxiliary lip are arranged on the annular elastic body, the lower part of the annular main lip is connected with the annular elastic body, the upper part of the annular auxiliary lip is connected with the annular elastic body, the annular main lip is provided with a main lip mouth which is used for being in interference fit with a wheel shaft of a crankshaft belt pulley, the annular auxiliary lip is provided with an auxiliary lip mouth with the, when the main lip is in interference fit with the wheel axle of the crankshaft belt pulley, the annular main lip expands outwards to drive the annular elastic body to deform so as to drive the annular auxiliary lip to contract inwards, so that the auxiliary lip is in elastic contact with the wheel axle of the crankshaft belt pulley.

The above prior art solutions have the following drawbacks: in the case of sufficient lubrication, the main lip is generally not worn, but when the amount of lubricating oil is insufficient or external dust intrudes, the main lip is easily worn, and the sealing effect is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art exists, the utility model aims at providing a durable bent axle oil blanket through the setting of first lip, second lip and recess, prevents that the interior lubricating oil mass of main lip is not enough and outside dust from invading main lip, makes main lip reducing wear, keeps good leakproofness.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a durable bent axle oil blanket, includes the rubber body, it is equipped with the skeleton to inlay on the rubber body, the rubber body is including main lip and dustproof lip, main lip includes first lip and the second lip that sets up along rubber body axial interval, be formed with the recess between first lip and the second lip.

Through adopting above-mentioned technical scheme, first lip forms twice with the second lip and seals, prevents when improving main lip leakproofness that dust lip wearing and tearing back air side from getting into in the main lip and producing wearing and tearing to main lip, can hold lubricating oil in the recess and constantly for main lip provides lubrication, prevents to appear the not enough condition of oil mass in the main lip and lead to main lip wearing and tearing for main lip has good leakproofness.

The utility model discloses further set up to: the groove is arranged in a circular arc shape.

Through adopting above-mentioned technical scheme, the recess is convex setting and is convenient for the recess and produce deformation after receiving the bent axle extrusion, makes the lubricating oil in the recess extrude and provide the lubrication.

The utility model discloses further set up to: and a circle of tightening springs are arranged on the outer side of the groove in the main lip along the circumferential direction.

Through adopting above-mentioned technical scheme, tighten up the spring and provide the clamp force, promote the recess to take place deformation, make lubricating oil extrude in the recess more easily, tighten up the clamp force that the spring provided simultaneously and improved the leakproofness between bent axle and the main lip.

The utility model discloses further set up to: the holding tank of round intercommunication is seted up along circumference to the recess tank bottom, tighten up the spring joint and cooperate in the holding tank inner wall, and the opening of holding tank is less than the diameter of tightening up the spring.

Through adopting above-mentioned technical scheme, the setting of holding tank is convenient for step up the spring mounting to the main lip in, and the holding tank bore is less, tightens up the spring and holds tank inner wall butt after the expansion, is difficult to deviate from the holding tank.

The utility model discloses further set up to: the groove bottom of the groove is bonded with a circle of isolated paste for sealing the opening of the accommodating groove along the circumferential direction.

Through adopting above-mentioned technical scheme, isolated subsides play prevent that lubricating oil from getting into in the holding tank and prevent to tighten up the effect that the spring deviates from holding the inslot.

The utility model discloses further set up to: and a circle of anti-loosening spring is arranged on the outer side wall of the main lip along the circumferential direction.

Through adopting above-mentioned technical scheme, locking spring provides the clamp force, improves the leakproofness between bent axle and the main lip.

The utility model discloses further set up to: the second lip is arranged on one side, close to the dustproof lip, of the main lip, and an oil return line is arranged on one side wall, close to the dustproof lip, of the second lip.

By adopting the technical scheme, when the crankshaft rotates, a pumping effect is formed at the lip, so that leaked oil is pumped back.

The utility model discloses further set up to: and a plurality of weight reduction grooves are formed in the inner side wall of the framework along the circumferential direction.

By adopting the technical scheme, the framework is lightened due to the weight reduction grooves.

To sum up, the beneficial effects of the utility model are that:

first lip and second lip form twice sealedly, prevent when improving main lip leakproofness that the dust on dust lip wearing and tearing rear air side from getting into in the main lip and producing wearing and tearing to main lip, can hold lubricating oil in the recess and constantly for main lip provides the lubrication, prevent to appear the not enough condition of oil mass in the main lip and lead to main lip wearing and tearing for main lip has good leakproofness.

Drawings

Fig. 1 is a schematic partial cross-sectional view of the present invention;

fig. 2 is a schematic view of the isolated sticker of the present invention in a partial cross-section after being torn off.

Reference numerals: 1. a rubber body; 2. a framework; 3. A main lip; 4. A dust lip; 5. a locking spring; 6. tightening the spring; 7. isolating paste; 8. a weight reduction groove; 9. a first lip; 10. a second lip; 11. an oil return line; 12. a groove; 13. and (6) accommodating the tank.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a durable crankshaft oil seal, as shown in fig. 1 and 2, which comprises a rubber body 1, wherein a framework 2 is embedded in the rubber body 1, and a plurality of weight reduction grooves 8 are formed in the inner side wall of the framework 2 along the circumferential direction. The rubber body 1 comprises a main lip 3 and a dust lip 4, and a circle of anti-loosening spring 5 is sleeved on the outer side wall of the main lip 3 along the circumferential direction. The main lip 3 comprises a first lip 9 and a second lip 10 which are arranged along the axial direction of the rubber body 1 at intervals, the second lip 10 is arranged on one side of the main lip 3 close to the dustproof lip 4, and an oil return line 11 is arranged on one side wall of the second lip 10 close to the dustproof lip 4. A circular arc-shaped groove 12 is formed between the first lip 9 and the second lip 10, and the groove 12 is used for containing lubricating oil. The holding tank 13 of round intercommunication is seted up along circumference to 12 tank bottoms of recess, has the round to tighten up spring 6 along the cooperation of circumference joint in the holding tank 13, and the opening of holding tank 13 is less than the diameter of tightening up spring 6, tightens up spring 6 and is used for providing the power of tightening for holding tank 13 takes place to deform, and lubricating oil is extruded from recess 12. The groove bottom of the groove 12 is bonded with a circle of isolating paste 7 which closes the opening of the accommodating groove 13 along the circumferential direction and is used for preventing lubricating oil from entering the accommodating groove 13.

The specific operation flow of this embodiment is as follows:

first lip 9 forms twice with second lip 10 and seals, prevents when improving 3 leakproofness of main lip that dust lip 4 from wearing and tearing the dust of air side get into main lip 3 in and produce wearing and tearing to main lip 3, can hold lubricating oil and constantly provide the lubrication for main lip 3 in the recess 12, prevents to appear the not enough condition of oil mass and lead to 3 wearing and tearing of main lip in the main lip 3 for main lip 3 has good leakproofness.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a durable crankshaft oil blanket, includes the rubber body (1), inlay on the rubber body (1) and be equipped with skeleton (2), the rubber body (1) is including main lip (3) and dust lip (4), its characterized in that: the main lip (3) comprises a first lip (9) and a second lip (10) which are arranged at intervals along the axial direction of the rubber body (1), and a groove (12) is formed between the first lip (9) and the second lip (10).

2. A durable crankshaft oil seal as defined in claim 1, wherein: the groove (12) is arranged in a circular arc shape.

3. A durable crankshaft oil seal as defined in claim 1, wherein: and a circle of tightening springs (6) are arranged on the outer side of the groove (12) in the main lip (3) along the circumferential direction.

4. A durable crankshaft oil seal as defined in claim 3, wherein: the groove bottom of the groove (12) is circumferentially provided with a circle of communicated accommodating groove (13), the tightening spring (6) is in clamping fit with the inner wall of the accommodating groove (13), and the opening of the accommodating groove (13) is smaller than the diameter of the tightening spring (6).

5. The durable crankshaft oil seal of claim 4, wherein: and a circle of isolating paste (7) for closing the opening of the accommodating groove (13) is adhered to the bottom of the groove (12) along the circumferential direction.

6. A durable crankshaft oil seal as defined in claim 1, wherein: and a circle of anti-loosening spring (5) is arranged on the outer side wall of the main lip (3) along the circumferential direction.

7. A durable crankshaft oil seal as defined in claim 1, wherein: the second lip (10) is arranged on one side, close to the dustproof lip (4), of the main lip (3), and an oil return line (11) is arranged on one side wall, close to the dustproof lip (4), of the second lip (10).

8. A durable crankshaft oil seal as defined in claim 1, wherein: and a plurality of weight reduction grooves (8) are formed in the inner side wall of the framework (2) along the circumferential direction.