CN214578311U - Hub bearing with novel sealing ring - Google Patents

Abstract

The utility model discloses a wheel hub bearing equipped with a novel sealing ring. A seal is arranged between the left end of the bearing inner ring and the bearing outer ring, a sealing ring is arranged between the right end of the bearing inner ring and the bearing outer ring, the seal includes a fixing ring, and the fixing ring is attached to the inner peripheral wall of the bearing outer ring In the upper part, the inclined surface and the fixed ring are arranged in a clearance fit and the gap is a transition cavity, the outer peripheral wall of the fixed ring is extended with a muddy water lip towards the inclined surface, and the muddy water lip is arranged in an interference fit with the inclined surface, and the fixed ring is in the direction of the outer peripheral wall of the bearing inner ring. A grease lip is extended, and the grease lip is arranged in an interference fit with the outer peripheral wall of the inner ring of the bearing. The grease lip is provided with an air hole for connecting the transition cavity with the inside of the bearing. The utility model solves the problems in the prior art that the bearing grease leakage is serious, the sealing performance is poor, and the abnormal noise of the bearing caused by the sharp increase of the friction torque after the sealing ring is used for a period of time.

Description

Hub bearing with novel sealing ring

Technical Field

The utility model relates to a bearing technical field specifically is a wheel hub bearing who is equipped with novel sealing washer.

Background

The sealing structure of the automobile hub bearing is of great importance to the influence of the performance of the bearing, if the sealing capability is poor, the leakage of lubricating grease inside the automobile hub bearing and the invasion of pollutants such as external muddy water, water vapor and dust can be caused, the service life of the bearing is seriously influenced, and in an extreme case, even a wheel is suddenly locked to cause a serious accident. Two problems occur in the using process, namely abnormal sound occurs after the bearing is used for a period of time and the friction torque of the bearing becomes very large; secondly, the problem of grease leakage occurs after the bearing is used for a period of time, and the root cause of grease leakage of the bearing in the prior art is as follows: 1. bearing operation causes redistribution of internal grease; 2. the bearing causes the temperature of the internal air to rise during operation, the high temperature causes the internal air pressure to increase, and the increased air pressure pushes the sealing lip to expand outwards; 3. the base oil in the grease is separated under the action of the load of the bearing during operation, the viscosity of the grease is reduced due to the rise of air temperature, the grease flows more easily, the kinetic energy generated by the flowing of the grease forms hydrodynamic pressure on the sealing lip during the operation of the bearing, and the dynamic pressure and the internal air pressure act together to push the sealing lip to expand a channel outwards so that the base oil seeps out, so that the grease leakage phenomenon is caused, and when the bearing leaks oil seriously, the base oil can even stretch to the position of a brake disc to possibly influence the braking safety.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a wheel hub bearing who is equipped with novel sealing washer, leak the problem of the bearing abnormal sound that fat phenomenon is comparatively serious and sealing performance is relatively poor and sealing washer use a period back friction torque surge to arouse for solving prior art bearing.

In order to achieve the purpose, the utility model provides a wheel hub bearing assembled with a novel sealing ring, which comprises a bearing inner ring and a bearing outer ring, wherein the left end part of the bearing inner ring is provided with a connecting flange, an inclined plane is connected between the connecting flange and the left end part of the bearing inner ring, a sealing element is arranged between the left end part of the bearing inner ring and the bearing outer ring, a sealing ring is arranged between the right end part of the bearing inner ring and the bearing outer ring, the sealing element comprises a fixing ring, the fixing ring is attached to the inner peripheral wall of the bearing outer ring, the inclined plane is in clearance fit with the fixing ring, the clearance is a transition cavity, a muddy water lip extends towards the inclined plane direction from the peripheral wall of the fixing ring and is in interference fit with the inclined plane, a grease lip extends towards the peripheral wall of the bearing inner ring and is in interference fit with the peripheral wall of the bearing inner ring, and the grease lip is provided with an air hole which enables the transition cavity to be communicated with the inside of the bearing.

The technical scheme is adopted, and the method has the advantages that: according to the technology, the inner side and the outer side of the grease lip are communicated through the arrangement of the air holes, namely the transition cavity is communicated with the interior of the bearing, so that air pressures of the inner side and the outer side of the grease lip are balanced, the air pressure on the grease lip is reduced, the grease lip and the muddy water lip are prevented from expanding outwards to cause sealing failure of the bearing, when the bearing operates, air flow at the air holes on the grease lip flows at a high speed to form an air protective film, fluid formed by flowing of grease in the bearing can be prevented from flowing out of the interior of the bearing, and the grease in the bearing cannot gather towards the inner side of the grease lip due to the arrangement of the air holes to form a negative pressure effect, so that the running resistance moment of the muddy water lip is increased and the abnormal sound problem caused by subsequent abrasion is aggravated; the setting of gas pocket and muddy water lip had both had the function that prevents grease in the bearing and spill over in the above-mentioned technique, avoided the bearing to appear again because of the grease reveals the problem that leads to the braking brake performance to receive the influence.

The utility model discloses further set up: the periphery wall of the fixing ring extends towards the direction of the inclined surface to form a middle lip, and the middle lip is abutted and buckled on the inclined surface.

The technical scheme is adopted, and the method has the advantages that: the sealing performance of the bearing is further improved by the arrangement of the middle lip in the technology, so that external impurities are prevented from easily entering the inside of the bearing, the bearing operation is prevented from being influenced, and further grease in the bearing is prevented from leaking.

The utility model discloses further set up: the fixed ring periphery wall has the dust ring towards transition chamber opening part bending type, dust ring periphery wall and flange internal perisporium clearance fit set up.

The technical scheme is adopted, and the method has the advantages that: the setting of keeping off the dust ring is further guaranteed that during external impurity can not get into the transition chamber easily, avoids bearing inside to receive external impurity to corrode and leads to the bearing rotational speed to receive the influence.

The utility model discloses further set up: the clearance scope between gas pocket internal perisporium top and the bearing inner race periphery wall is 0 to 0.5 mm.

The technical scheme is adopted, and the method has the advantages that: the clearance scope between gas pocket internal perisporium top and the bearing inner race periphery wall is 0 to 0.5mm, and the setting of above-mentioned technique is guaranteed that the gas vent opening part can form gas protection film when the bearing operation for the inside grease of bearing is difficult to leak through the gas pocket, and the setting of this clearance scope makes inside and outside both sides atmospheric pressure of grease lip can be balanced, reduces the gas pressure on the grease lip.

Drawings

Fig. 1 is a sectional view of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

Detailed Description

The utility model provides a wheel hub bearing assembled with a novel sealing ring 3, which comprises a bearing inner ring 1 and a bearing inner ring 2, wherein the left end part of the bearing inner ring 2 is provided with a connecting flange 21, an inclined plane 22 is connected between the connecting flange 21 and the left end part of the bearing inner ring 2, a sealing element is arranged between the left end part of the bearing inner ring 2 and the bearing outer ring 1, the sealing element 3 is arranged between the right end part of the bearing inner ring 2 and the bearing outer ring 1, the sealing element comprises a fixing ring 4, the fixing ring 4 is attached to the inner peripheral wall of the bearing outer ring 1, the inclined plane 22 is in clearance fit with the fixing ring 4, the clearance is a transition cavity 23, the peripheral wall of the fixing ring 4 extends towards the inclined plane 22 to form a mud water lip 41, the mud water lip 41 is in interference fit with the inclined plane 22, the fixing ring 4 extends towards the peripheral wall of the bearing inner ring 2 to form a grease lip 42, and the grease lip 42 is in interference fit with the peripheral wall of the bearing inner ring 2, offer the gas pocket 43 that makes transitional cavity 23 and the inside be linked together of bearing on the grease lip 42, 4 periphery walls of solid fixed ring extend towards 22 directions on inclined plane have middle lip 44 and this middle lip 44 to support and detain at inclined plane 22, 4 periphery walls of solid fixed ring have dust ring 5 towards 23 opening part bending of transitional cavity, 5 periphery walls of dust ring and flange 21 internal perisporium clearance fit set up, the clearance range between 2 periphery walls of gas pocket 43 internal perisporium top and bearing inner race is 0 to 0.5 mm.

When the bearing operates, the air flow at the air holes 43 on the grease lip 42 flows at high speed to form an air protective film, and fluid formed by the flowing of grease in the bearing can be prevented from flowing out of the interior of the bearing.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, and it should be understood by those skilled in the art that the present invention is not limited by the above embodiments, but only by the principle of the present invention, and the present invention can be modified without departing from the spirit and scope of the present invention, and all of the modifications and improvements fall within the scope of the present invention.

Claims (4)

1. A hub bearing equipped with a new type of sealing ring is characterized in that: it comprises a bearing outer ring and a bearing inner ring, the left end of the bearing inner ring is provided with a connecting flange, and the connecting flange and the left end of the bearing inner ring are provided with a connecting flange. An inclined surface is connected between them, a seal is arranged between the left end of the inner ring of the bearing and the outer ring of the bearing, a seal is arranged between the right end of the inner ring of the bearing and the outer ring of the bearing, and the seal includes a fixing ring , the fixing ring is attached to the inner peripheral wall of the outer ring of the bearing, the inclined surface is arranged in a clearance fit with the fixing ring, and the clearance is a transition cavity, the outer peripheral wall of the fixing ring extends toward the inclined surface with a mud-water lip and the mud-water lip It is arranged with interference fit with the inclined surface, the fixing ring is extended with a grease lip towards the outer peripheral wall of the bearing inner ring, and the grease lip is arranged in an interference fit with the outer peripheral wall of the bearing inner ring. Internally connected air holes. 2 . The hub bearing equipped with a new type of sealing ring according to claim 1 , wherein the outer peripheral wall of the fixing ring has an intermediate lip extending toward the inclined surface, and the intermediate lip abuts on the inclined surface. 3 . 3 . The hub bearing equipped with a new type of sealing ring according to claim 1 , wherein the outer peripheral wall of the fixing ring is bent with a dust retaining ring toward the opening of the transition cavity, and the outer peripheral wall of the dust retaining ring is connected with the outer peripheral wall of the dust retaining ring. 4 . The inner peripheral wall of the connecting flange is provided with clearance fit. 4 . The hub bearing equipped with a new type of sealing ring according to claim 1 , wherein the gap between the top end of the inner peripheral wall of the air hole and the outer peripheral wall of the bearing inner ring is in the range of 0 to 0.5 mm. 5 .

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