CN213064368U

CN213064368U - Maintenance-free hub unit

Info

Publication number: CN213064368U
Application number: CN202021789150.2U
Authority: CN
Inventors: 李雪亮
Original assignee: Ningbo Zhanxin Automotive Technology Development Co ltd
Current assignee: Ningbo Zhanxin Automotive Technology Development Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-04-27
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a non-maintaining wheel hub unit, including wheel hub and the axle sleeve of setting in wheel hub, be provided with the bellied bulge loop of round on wheel hub's the inside wall, every group tapered roller bearing's outer lane pushes up respectively and leans on the lateral wall top with the bulge loop, the tapered roller bearing's that is located bulge loop both sides inner circle is pushed up each other and is leaned on, the spacing inslot of two inner circles is detained to a C type clamp, be provided with the stereoplasm bush in two inner circle junctions, be provided with the seal groove in the both sides of stereoplasm bush, be provided with first sealing ring in the seal groove, be provided with the slot on the inner wall of one of them a set of inner circle, second sealing washer and bearing inner. The maintenance-free hub unit ensures that the joint of the inner rings of the two bearings is sealed by the first sealing ring on the hard lining, and the grease is prevented from leaking to the bearing roller part; in addition, the second sealing ring and the bearing inner ring retaining ring are sealed, so that the gear oil on the main speed reducer is prevented from leaking to a semi-shaft sleeve connected with the main speed reducer.

Description

Maintenance-free hub unit

Technical Field

The utility model relates to an automobile wheel hub field.

Background

The hub system, which is engaged with the axle, is maintained at intervals to replace components such as brake pads. In maintenance work, the hub needs to be removed from the axle. At present, a single-row tapered roller bearing is mostly adopted in a hub system. Once the wheel hub is detached from the axle, the inner ring of the single-row tapered roller bearing is separated from the outer ring, and the bearing has to be reinstalled when the wheel hub is installed on the axle, which not only brings trouble to the maintenance work of the wheel hub system, but also easily dirties the grease in the bearing. Therefore, the conventional hub system must be serviced for each maintenance. However, even if grease is replaced for the bearing, foreign matter is inevitably introduced into the bearing due to the influence of the field environment, and the life of the bearing is reduced.

To this patent application number be "CN 201711268652.3", the utility model patent of the name "an automobile and wheel hub bearing unit" discloses a wheel hub structure, and it includes wheel hub and axle housing spindle nose, rotates wheel hub supporting on the axle housing spindle nose through two sets of bearings that set up on the axle housing spindle nose, in addition, for improving sealing performance, gap department between outer bearing inner circle right-hand member and the inner bearing inner circle left end is sealed through first sealing washer.

However, in the above structure, it is difficult to ensure leakage of grease to the bearing roller portion only by the first seal ring. In addition, because the gap that forms between two bearings is in fact because of bearing machining precision, the influence of the machining precision of wheel hub inner bearing frame, it is difficult to guarantee sealing performance when cooperating with the sealing washer. And the gear oil on the main speed reducer in the automobile is easy to leak to the axle sleeve connected with the main speed reducer.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a to the not enough of existence among the prior art, provide non-maintaining wheel hub unit.

The utility model discloses a realize through following technical scheme: the maintenance-free hub unit comprises a hub and a semi-shaft sleeve arranged in the hub, wherein the semi-shaft sleeve and the hub are rotatably supported through two groups of tapered roller bearings, a circle of raised convex rings are arranged on the inner side wall of the hub, the outer ring of each group of tapered roller bearings is respectively abutted against the side wall of the raised ring, the inner rings of the tapered roller bearings positioned at the two sides of the raised rings are abutted against each other, limiting grooves are respectively arranged on one side of the inner rings which are mutually abutted, a C-shaped clamp is buckled into the two limiting grooves, a hard lining is arranged at the joint of the two inner rings, sealing grooves are arranged on two sides of the hard lining, the bearing inner ring blocking ring is characterized in that a first sealing ring is arranged in the sealing groove, a group of grooves are formed in the inner wall of the inner ring, and a second sealing ring and a bearing inner ring blocking ring are sequentially arranged in each groove.

In the above technical solution, when the outer ring of the tapered roller bearing abuts against the raised ring, the outer ring has an end portion protruding out of the raised ring.

In the technical scheme, an oil seal is arranged between the hub and the top wall of the inner ring of the tapered roller bearing.

In the technical scheme, V-shaped positioning grooves are formed in the outer sides of the outer ring abutting positions of the two groups of tapered roller bearings, and V-shaped protrusions are arranged on the inner wall of the hard bushing.

The utility model discloses following beneficial effect has: the maintenance-free hub unit ensures that the joint of the inner rings of the two bearings is sealed by the first sealing ring on the hard lining, and the grease is prevented from leaking to the bearing roller part; in addition, the second sealing ring and the bearing inner ring retaining ring are sealed, so that the gear oil on the main speed reducer is prevented from leaking to a semi-shaft sleeve connected with the main speed reducer.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a partially enlarged view of B in fig. 1.

Detailed Description

The invention will be described in further detail with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 3, the hub comprises a hub 1 and a half-axle sleeve 2 arranged in the hub 1, the half-axle sleeve 2 and the hub 1 are rotatably supported by two sets of tapered roller bearings 3, a circle of raised ring 10 is arranged on the inner side wall of the hub 1, the tapered roller bearings 3 are arranged on two sides of the raised ring 10, outer rings 30 of the tapered roller bearings 3 are respectively abutted against the side walls of the raised ring 10, inner rings 31 of the tapered roller bearings 3 on two sides of the raised ring 10 are abutted against each other, a limit groove 31a is respectively arranged on one side of the two inner rings 31 abutted against each other, a C-shaped clamp 2 is buckled into the two limit grooves 31a, so as to fixedly connect the inner rings 31 of the two tapered roller bearings 3 into a whole, a hard bushing 5 is arranged at the joint of the two inner rings 31, and seal grooves 50 are arranged on two sides of the hard bushing 5, a first seal ring 51 is provided in the seal groove 50. And a slot 31b is arranged on the inner wall of one group of the inner rings 31, and a second sealing ring 8 and a bearing inner ring retaining ring 7 are sequentially arranged in the slot 31 b.

In the structure, the joint of the two bearing inner rings is sealed by the first sealing ring on the hard bushing, so that the leakage of grease to the bearing roller part is avoided, and the sealing performance is greatly improved compared with a sealing mode only by one sealing ring; in addition, the second sealing ring and the bearing inner ring retaining ring are sealed, so that the gear oil on the main speed reducer is prevented from leaking to a semi-shaft sleeve connected with the main speed reducer.

An oil seal 6 is provided between the hub 1 and the top wall of the inner ring 31 of the tapered roller bearing 3 to prevent oil from entering the rollers of the tapered roller bearing from the outside. The outer ring 30 of the tapered roller bearing 3 has an end portion protruding beyond the projecting ring 10 when abutting against the projecting ring 10. In the above structure, the outer ring 30 can be removed from the hub by applying an axially outward force to the end portion.

The outer side of the place where the outer ring 30 of the two groups of tapered roller bearings 3 abuts is provided with a V-shaped positioning groove 100, the inner wall of the hard bushing 5 is provided with a V-shaped bulge 101, and the hard bushing 5 can only be installed to the right position by aligning the V-shaped bulge 101 arranged on the inner wall of the hard bushing 5 to the position of the V-shaped bulge 101.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The foregoing embodiments and description of the invention have been provided in the present application for the purpose of illustrating the principles of the invention and is subject to various changes and modifications without departing from the spirit and scope of the invention. All such variations and modifications are intended to be within the scope of the claimed invention.

Claims

1. Non-maintaining wheel hub unit is in including wheel hub (1) and setting axle sleeve (2) in wheel hub (1), axle sleeve (2) with rotate the support through two sets of tapered roller bearing (3) between wheel hub (1), its characterized in that: a circle of raised convex rings (10) are arranged on the inner side wall of the hub (1), the outer ring (30) of each group of tapered roller bearings (3) is respectively abutted against the side wall of the raised rings (10), the inner rings (31) of the tapered roller bearings (3) positioned at the two sides of the raised rings (10) are mutually abutted against each other, limiting grooves (31 a) are respectively arranged on one side of the inner ring (31) which is abutted against each other, a C-shaped hoop (4) is buckled into the two limiting grooves (31 a), a hard bushing (5) is arranged at the joint of the two inner rings (31), sealing grooves (50) are arranged on two sides of the hard bushing (5), a first sealing ring (51) is arranged in the sealing groove (50), a slot (31 b) is arranged on the inner wall of one group of the inner rings (31), and a second sealing ring (8) and a bearing inner ring retaining ring (7) are sequentially arranged in the slot (31 b).

2. Maintenance-free hub unit according to claim 1, wherein: the outer ring (30) of the tapered roller bearing (3) has an end portion protruding beyond the projecting ring (10) when abutting against the projecting ring (10).

3. Maintenance-free hub unit according to claim 1, wherein: an oil seal (6) is arranged between the hub (1) and the top wall of the inner ring (31) of the tapered roller bearing.

4. Maintenance-free hub unit according to claim 1, wherein: the outer side of the position where the outer ring (30) of the two groups of tapered roller bearings (3) abuts against is provided with a V-shaped positioning groove (100), and the inner wall of the hard bushing (5) is provided with a V-shaped bulge (101).