CN212839388U

CN212839388U - Oil seal for hub

Info

Publication number: CN212839388U
Application number: CN202021799832.1U
Authority: CN
Inventors: 胡培基; 刘春阳
Original assignee: Zhejiang Oufu Sealing Parts Co ltd
Current assignee: Zhejiang Oufu Sealing Parts Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-03-30
Anticipated expiration: 2030-08-25

Abstract

The utility model relates to the technical field of sealing elements, and aims to provide an oil seal for a wheel hub, which comprises a rubber body, wherein a dust lip is arranged on the rubber body, an annular felt is arranged on the outer circumferential wall of the dust lip, a circle of elastic fixing ring is arranged on the inner circumferential surface of the felt along the circumferential direction, an annular clamping groove is arranged on the outer circumferential wall of the dust lip along the circumferential direction, and the fixing ring is clamped and matched in the clamping groove; the utility model discloses a solid fixed ring of elasticity makes the dustproof lip inwards draw in, improves the leakproofness of dustproof lip.

Description

Oil seal for hub

Technical Field

The utility model relates to a sealing member technical field, in particular to oil blanket for wheel hub.

Background

The wheel hub oil seal is used for sealing lubricating oil inside a wheel hub, and the oil seal mainly has the following two functions: the leakage of lubricating oil is prevented through the main sealing lip of the oil seal, so that the bearing is ensured to have good lubricating conditions, and the lubricating oil is prevented from polluting a brake pad, a brake drum and the like to cause the weakening or failure of the braking capacity; prevent through the dust lip that outside foreign matter from invading inside the wheel hub, cause the damage to the bearing.

In the prior art, a Chinese patent document with an authorization publication number of CN202251973U discloses a multifunctional hub oil seal, which comprises a metal framework, an inner sealing colloid, an outer sealing colloid and a spring, wherein the inner sealing colloid is positioned at the inner end of the metal framework and is tightly contacted with a working shaft, the outer sealing colloid is positioned on the outer side surface of the metal framework and is tightly matched with an internal thread of an outer spiral cover, the spring is sleeved on the inner sealing colloid, the upper end of the metal framework is in bearing contact with the bottom of the outer spiral cover, and the lower bottom surface of the metal framework is in bearing contact with; the sealing colloid contains the screw thread structure with outer screw cap screw thread fit, and the below of interior sealing colloid is equipped with two pressure relief lips.

The above prior art solutions have the following drawbacks: above-mentioned two pressure relieving vice lips generally are the rubber material, play dustproof effect, and two pressure relieving vice lips when the axis of rotation rotates and the circumference lateral wall in close contact with of axis of rotation, long-time friction easily leads to the contact surface wearing and tearing of two pressure relieving vice lips, and two pressure relieving vice lips reduce the effect of hugging closely of axis of rotation for sealed effect descends, exists certain defect.

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 wheel hub uses oil blanket makes the dustproof lip inwards draw in through the solid fixed ring of elasticity, improves the leakproofness of dustproof lip.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an oil seal for wheel hub, includes the rubber body, be provided with the dust lip on the rubber body, be provided with on the outer circumferential wall of dust lip and be annular felt, be provided with the elastic solid fixed ring of elasticity of round along circumference on the inner circumferential surface of felt, seted up along circumference on the outer circumferential wall of dust lip and be annular draw-in groove, gu fixed ring joint cooperates in the draw-in groove.

Through adopting above-mentioned technical scheme, the solid fixed ring of elasticity makes the dustproof lip inwards draw in for improve the leakproofness of dustproof lip, and the felt plays the sealed effect of second way, improves the dustproof performance of the rubber body.

The utility model discloses further set up to: the two opposite inner side walls on the clamping groove incline towards the direction away from each other, and the opening area of the clamping groove is larger than the bottom area of the groove.

Through adopting above-mentioned technical scheme, the setting of the slope inner wall of draw-in groove plays the solid fixed ring cover of the elasticity of being convenient for and establishes the effect to the dust lip.

The utility model discloses further set up to: the inner sides of two ends of the elastic fixing ring are provided with annular chamfers, and the chamfers are attached to the inclined inner walls of the clamping grooves; and an annular sealing ring is embedded on the chamfer along the circumferential direction.

Through adopting above-mentioned technical scheme, the setting of the solid fixed ring of elasticity upper chamfer and sealing washer all is used for improving the seal between dust lip and the felt.

The utility model discloses further set up to: one end of the felt, which is far away from the rubber body, extends along the direction of being far away from the rubber body and is inclined outwards to form an extension part, and the extension part is positioned on one side, which is far away from the rubber body, of the dust lip.

By adopting the technical scheme, the extension part increases the contact area of the felt and the circumferential side wall of the rotating shaft, so that the dustproof performance is improved.

The utility model discloses further set up to: the rubber body is provided with a rubber body, the rubber body is provided with an extension part, the extension part is arranged on the rubber body, the rubber body is provided with a fixing groove, the fixing part is arranged on the rubber body, the end, opposite to the end provided with the extension part, of the felt along the circumferential direction, the fixing groove is formed in the outer side of the dust lip, and the fixing part is bonded in the fixing.

Through adopting above-mentioned technical scheme, the fastness when the fixed part bonds in the fixed slot and makes the felt setting on the dust lip increases.

The utility model discloses further set up to: the bottom of the fixed groove is provided with a plurality of inserted bars, and the fixed part is inserted on the inserted bars in an interference manner.

Through adopting above-mentioned technical scheme, when the felt inwards shrinks under the effect of the solid fixed ring of elasticity, the fixed part is easy atress and leaves the fixed slot, and the inserted bar plays the fixed action and prevents that the fixed part from being taken away from the fixed slot by the solid fixed ring of elasticity.

The utility model discloses further set up to: and the outer circumferential wall of the felt is circumferentially provided with an annular bump.

Through adopting above-mentioned technical scheme, the setting of lug plays the effect of being convenient for take off the felt from the dust lip, improves the effect of hugging closely of dust lip to the axis of rotation simultaneously.

The utility model discloses further set up to: the rubber body is embedded with the skeleton, be provided with a plurality of heavy grooves that subtract along circumference on the inner wall of skeleton.

By adopting the technical scheme, the framework is provided with the weight reduction grooves, so that the framework achieves the effect of light weight.

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

the elastic fixing ring enables the dust lip to be folded inwards and is used for improving the sealing performance of the dust lip, and the felt plays a role in secondary sealing and improves the dust-proof performance of the rubber body; the felt is firmly fixed on the dust lip through the fixing part; the extension portion improves the dust-proof sealing performance of the rubber body.

Drawings

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

fig. 2 is an enlarged schematic view at a in the drawing.

Reference numerals: 1. a rubber body; 11. fixing grooves; 2. a framework; 21. a weight reduction groove; 3. a dust lip; 31. a card slot; 4. felt; 41. an extension portion; 42. a fixed part; 51. loosening and tightening the fixing ring; 511. chamfering; 52. a bump; 53. a seal ring; 6. and (4) inserting the rod.

Detailed Description

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

The embodiment discloses an oil seal for a wheel hub, which comprises a rubber body 1, wherein a framework 2 is embedded in the rubber body 1, and a plurality of weight reduction grooves 21 are integrally formed in the inner wall of the framework 2 along the circumferential direction, as shown in fig. 1 and 2. The rubber body 1 is integrally formed with a dust lip 3, the outer circumferential wall of the dust lip 3 is provided with an annular felt 4, and the inner wall of the felt 4 is attached to the outer wall of the dust lip 3. The inner circumferential surface of the felt 4 is fixedly connected with a circle of elastic fixing rings 51 along the circumferential direction, the outer circumferential wall of the dust lip 3 is provided with an annular clamping groove 31 along the circumferential direction, the elastic fixing rings 51 are clamped and matched in the clamping groove 31, and the elastic fixing rings 51 play a role in fixing and simultaneously enable the dust lip 3 to be folded inwards. An annular elastic projection 52 is fixedly connected to the outer circumferential wall of the felt 4 along the circumferential direction, and the projection 52 functions to facilitate the removal of the felt 4 from the dust lip 3. Two opposite inner side walls on the clamping groove 31 incline towards the direction of mutual distance, the opening area of the clamping groove 31 is larger than the bottom area of the groove, annular chamfers 511 are arranged on the inner sides of two ends of the elastic fixing ring 51, and the chamfers 511 are attached to the inclined inner walls of the clamping groove 31; the chamfer 511 is provided with an annular elastic seal ring 53 embedded along the circumferential direction, and the arrangement of the chamfer 511 and the seal ring 53 is used for improving the tightness between the dust lip 3 and the felt 4.

As shown in fig. 1 and 2, an extension 41 is formed at one end of the felt 4 away from the rubber body 1, extending in a direction away from the rubber body 1 and inclined outward, and the extension 41 is located at one side of the dust lip 3 away from the rubber body 1, and is used for increasing the contact area between the inner wall of the felt 4 and the rotating shaft, and further improving the sealing property. An annular fixing part 42 is integrally formed on the felt 4 along the circumferential direction at the edge opposite to the end provided with the extension part 41, a fixing groove 11 is formed at the outer side of the dust lip 3 at the end provided with the dust lip 3 on the rubber body 1, the fixing part 42 is bonded in the fixing groove 11 through an adhesive, and the fixing groove 11 is annular and coaxial with the dust lip 3; the bottom of the fixed groove 11 is fixedly connected with a plurality of inserted bars 6, the fixed part 42 is inserted in the inserted bars 6 in an interference manner, and the fixed part 42 plays a role in fixing and is matched with the inserted bars 6, so that the felt 4 is firmly fastened when being arranged on the dust lip 3.

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 an oil blanket for wheel hub, includes the rubber body (1), be provided with dust lip (3) on the rubber body (1), its characterized in that: the dustproof lip is characterized in that an annular felt (4) is arranged on the outer circumferential wall of the dustproof lip (3), a circle of elastic fixing rings (51) with elasticity is arranged on the inner circumferential surface of the felt (4) along the circumferential direction, annular clamping grooves (31) are formed in the outer circumferential wall of the dustproof lip (3) along the circumferential direction, and the fixing rings are clamped and matched in the clamping grooves (31).

2. An oil seal for a wheel hub according to claim 1, wherein: two relative inside walls on the clamping groove (31) incline towards the direction of mutual distance, and the opening area of the clamping groove (31) is larger than the bottom area of the groove.

3. An oil seal for a wheel hub as defined in claim 2, wherein: the inner sides of two ends of the elastic fixing ring (51) are respectively provided with an annular chamfer (511), and the chamfers (511) are attached to the inclined inner walls of the clamping grooves (31); and an annular sealing ring (53) is embedded on the chamfer angle (511) along the circumferential direction.

4. An oil seal for a wheel hub according to claim 1, wherein: one end, far away from the rubber body (1), of the felt (4) extends along the direction far away from the rubber body (1) and is obliquely formed towards the outer side to form an extending part (41), and the extending part (41) is located on one side, far away from the rubber body (1), of the dust lip (3).

5. An oil seal for a wheel hub as defined in claim 4, wherein: the rubber sealing device is characterized in that an annular fixing part (42) is arranged on the felt (4) along the circumferential direction at the edge relative to the end provided with the extending part (41), a fixing groove (11) is formed in the outer side of the dust lip (3) at the end, provided with the dust lip (3), of the rubber body (1), and the fixing part (42) is bonded in the fixing groove (11) through adhesive.

6. An oil seal for a wheel hub according to claim 5, wherein: the groove bottom of the fixing groove (11) is provided with a plurality of insertion rods (6), and the fixing part (42) is inserted in the insertion rods (6) in an interference mode.

7. An oil seal for a wheel hub according to claim 1, wherein: and an annular bump (52) is arranged on the outer circumferential wall of the felt (4) along the circumferential direction.

8. An oil seal for a wheel hub according to claim 1, wherein: the rubber body (1) is embedded with a framework (2), and a plurality of weight reduction grooves (21) are formed in the inner wall of the framework (2) along the circumferential direction.