CN210686698U

CN210686698U - Hub bearing

Info

Publication number: CN210686698U
Application number: CN201921164468.9U
Authority: CN
Inventors: 刘筷筷
Original assignee: Shanghai C&u Automotive Bearing Co ltd; C&U Group Ltd; Shanghai C&U Group Co Ltd
Current assignee: Shanghai C&u Automotive Bearing Co ltd; Shanghai C&U Group Co Ltd; C&U Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-06-05
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses a wheel hub bearing, which comprises an outer ring, an inner ring, a rolling body and a sealing component, wherein the sealing component comprises a sealing ring, an outer framework and an inner framework, the cross sections of the outer framework and the inner framework are L-shaped and are mutually buckled to form a cavity, the sealing ring comprises a connecting part and a sealing lip, the connecting part is provided with an annular convex rib, the connecting part is covered on one side of the inner framework far away from the outer framework, the outer framework comprises a first butt section and a second butt section, the sealing lip comprises a main sealing lip and an auxiliary sealing lip, the connecting part is covered on one side of the inner framework far away from the outer framework, so that the assembly of the sealing ring and the inner framework is more convenient, the distance between the outer framework and the inner framework is reduced, the space required by the sealing component is smaller, when the bearing operates, the friction torque received by the sealing ring is smaller, the bearing operates more smoothly, the main sealing lip and the auxiliary sealing, the main sealing lip and the auxiliary sealing lip are more firmly abutted with the outer framework.

Description

Hub bearing

Technical Field

The utility model belongs to the technical field of the wheel hub bearing, concretely relates to wheel hub bearing.

Background

The hub bearing is one of key parts of an automobile, has the main functions of bearing weight and providing accurate guide for the rotation of a hub, is a very important part on an axle, and has higher requirements along with the development of the automobile industry.

The wheel hub bearing includes the inner circle usually, outer lane and rolling element, seal assembly includes the sealing washer usually, outer skeleton and the inner frame of setting between outer skeleton and rolling element, the cross-section of outer skeleton and inner frame is L type and mutual lock vacuole formation, the sealing washer including set up in the cavity with the sealed seal lip of outer skeleton butt and the cladding at the connecting portion of inner frame towards outer skeleton one side, be equipped with on the connecting portion be located between inner frame and the outer lane and with outer lane interference fit's annular protruding muscle, the shape of current sealing washer leads to current seal assembly friction torque great, lead to the sealing washer wearing and tearing too fast, influence bearing leakproofness, influence bearing life.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a low-torque wheel hub bearing which meets the sealing requirement simultaneously.

In order to realize the purpose, the utility model discloses a technical scheme is: a hub bearing comprises an outer ring and an inner ring, wherein a rolling body and a sealing assembly are arranged between the outer ring and the inner ring, the sealing assembly comprises a sealing ring, an outer framework and an inner framework arranged between the outer framework and the rolling body, the cross sections of the outer framework and the inner framework are L-shaped and are mutually buckled to form a cavity, the sealing ring comprises a connecting part and a sealing lip arranged in the cavity and sealed with the butt of the outer framework, an annular convex rib which is positioned between the inner framework and the outer ring and is in interference fit with the outer ring is arranged on the connecting part, the connecting part is coated on one side of the inner framework far away from the outer framework, the outer framework comprises a first butt section parallel to the outer ring and a second butt section vertical to the first butt section, the sealing lip comprises a main sealing lip abutted against the first butt section and an auxiliary sealing lip abutted against the second butt section, the main sealing lip is inclined towards one side far away from the rolling body from the root to the, the secondary seal lip is inclined from the root part to the end part to one side far away from the first abutting section.

Among the above-mentioned technical scheme, compare in the one side that the connecting portion cladding is close to the exoskeleton in the inner frame, the equipment of sealing washer and inner frame is more made things convenient for in one side that the exoskeleton was kept away from to the connecting portion cladding at the inner frame, and reduced the distance between exoskeleton and the inner frame, the space that makes the seal assembly demand is littleer, when the bearing operation, the friction torque that the sealing washer received is littleer, make the bearing operation more smooth, main seal lip and vice seal lip all are the slope setting, make things convenient for the lock of exoskeleton and inner frame, make owner, vice seal lip is more firm with the exoskeleton butt.

As a further setting of the utility model, be equipped with a plurality of supplementary lips between main seal lip and the vice seal lip, there is the clearance to constitute labyrinth seal between supplementary lip and the second butt section.

Among the above-mentioned technical scheme, main seal lip, vice seal lip bearing seal completely, guarantee the leakproofness of bearing, after the long-time operation of bearing, main, vice seal lip can be because of the unable complete sealing of circumstances such as deformation or wearing and tearing, and the condition that quick inefficacy can not appear in the bearing can be guaranteed to labyrinth seal's existence this moment, guarantees bearing normal operating.

As a further setting of the utility model, be equipped with a plurality of lug on the second butt section, the lug is located supplementary lip, main seal lip and supplementary seal lip clearance between two liang.

Among the above-mentioned technical scheme, supplementary lip and lug form zigzag labyrinth seal, compare in smooth type labyrinth seal, and sealed effect is better.

As a further arrangement of the present invention, a holding ring groove is provided between the main seal lip and the adjacent auxiliary lip, and an elastic ring is provided in the holding ring groove.

Among the above-mentioned technical scheme, the installation of the elastic ring of being convenient for of holding annular groove, the elastic ring that is arranged in the holding annular groove makes on the first butt section of main seal lip can stabilize butt.

As a further arrangement of the present invention, the auxiliary lip is inclined with the projection, and the inclination direction is consistent with the auxiliary seal lip.

Among the above-mentioned technical scheme, supplementary lip and lug slope setting, and the incline direction is unanimous with vice seal lip, conveniently has the inner frame and the outer skeleton lock of sealing washer cladding, and convenient supplementary lip and the crisscross setting of lug after the lock.

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

Drawings

FIG. 1 is a sectional view of an embodiment of the present invention;

figure 2 is a cross-sectional view of a seal assembly according to an embodiment of the present invention.

Detailed Description

When terms such as "upper" and "lower", "right" and "left" or similar relative expressions are used in the present embodiment, these refer only to the accompanying drawings and are not necessarily actual usage.

The utility model discloses a concrete embodiment is shown in fig. 1-2, a wheel hub bearing, including outer lane 01 and inner circle 02, be equipped with rolling element 03 and seal assembly 04 between outer lane 01 and the inner circle 02, seal assembly 04 includes sealing washer 041, outer skeleton 042 and the inner frame 043 who sets up between outer skeleton 042 and rolling element 03, outer skeleton 042 and inner frame 043's cross-section is L type and mutual lock vacuole formation, sealing washer 041 includes connecting portion 0412 and sets up in the cavity with outer skeleton 042 butt sealed seal lip 0411, be equipped with on the connecting portion 0412 and be located between inner skeleton 043 and the outer lane 01 and with outer lane 01 interference fit's annular protruding muscle 04121, the one side of outer skeleton 042 is kept away from to connecting portion 0412 cladding inner skeleton 043, outer skeleton 042 includes the first butt section 0421 parallel with the outer lane 01 and the sealed butt section 0422 of second butt section 0421 mutually perpendicular's second butt section 0422 with the main butt section 0411 of first sealed butt section 0421 of lip 04111 with first sealed butt section 0421, the vice butt section 0422 of lip of seal lip 04112, the main sealing lip 04111 is inclined from the root to the end to the side far away from the rolling element 03, the auxiliary sealing lip 04112 is inclined from the root to the end to the side far away from the first abutting section 0421, and compared with the case that the connecting portion 0412 is covered on the side of the inner skeleton 043 close to the outer skeleton 042, the connecting portion 0412 is covered on the side of the inner skeleton 043 far away from the outer skeleton 042, so as to facilitate the assembly of the sealing ring 041 and the inner skeleton 043, and reduce the distance between the outer skeleton 042 and the inner skeleton 043, so that the space required by the sealing assembly 04 is smaller, when the bearing operates, the friction moment applied to the sealing ring 041 is smaller, so that the bearing operates more smoothly, the main sealing lip 04111 and the auxiliary sealing lip 04112 are both inclined, so that the outer skeleton 042 and the inner skeleton 043 are convenient to buckle, so that the main sealing lip 04111, the auxiliary sealing lip 0413 is more firmly connected between the main sealing lip 04111 and the auxiliary sealing lip 04112, a gap exists between the auxiliary lip 0413 and the second abutting section 0422, two bumps 04221 are arranged on the second abutting section 0422, the bumps 04221 are positioned in the gap between the auxiliary lip 0413, the main sealing lip 04111 and the auxiliary sealing lip 0411, and the auxiliary lip 0413 and the bumps 04221 form a zigzag labyrinth seal, compared with a smooth labyrinth seal, the seal effect is better, the bearings of the main sealing lip 04111 and the auxiliary sealing lip 04112 are completely sealed, so that the sealing performance of the bearing is ensured, after the bearing runs for a long time, the main sealing lip 04111 and the auxiliary sealing lip 04112 may not be completely sealed due to deformation or abrasion, and the labyrinth seal can ensure that the bearing does not rapidly fail, so that the bearing runs normally, an accommodating annular groove 0414 is arranged between the main sealing lip 04111 and the adjacent auxiliary lip 0413, an elastic ring 05 is arranged in the accommodating annular groove 0414, and the elastic ring 05 is convenient to install the accommodating annular groove 0414, the elastic ring 05 located in the accommodating ring groove 0414 enables the main sealing lip 04111 to be stably abutted against the first abutting section 0421, the auxiliary lip 0413 and the bump 04221 are obliquely arranged, the oblique direction of the auxiliary lip 04112 is consistent with that of the auxiliary sealing lip 04112, the inner framework 043 coated by the sealing ring 041 is conveniently buckled with the outer framework 042, and the auxiliary lip 0413 and the bump 04221 are conveniently arranged in a staggered manner after being buckled.

The utility model discloses do not confine the above-mentioned embodiment to, the general technical personnel in this field can adopt other multiple embodiments to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, all fall into the utility model discloses a protection scope.

Claims

1. The utility model provides a wheel hub bearing, includes outer lane and inner circle, be equipped with rolling element and seal assembly between outer lane and the inner circle, seal assembly includes sealing washer, outer skeleton and sets up the inner frame between outer skeleton and rolling element, the cross-section of outer skeleton and inner frame is L type and mutual lock vacuole formation, the sealing washer include connecting portion and set up in the cavity with the sealed seal lip of outer skeleton butt, be equipped with on the connecting portion be located between inner frame and the outer lane and with outer lane interference fit's annular protruding muscle, its characterized in that: the one side of outer frame is kept away from to the cladding of connecting portion at the inner frame, the outer frame include with the outer lane parallel first butt section and with first butt section mutually perpendicular's second butt section, the seal lip include with the main seal lip of first butt section butt and with the vice seal lip of second butt section butt, the main seal lip is by root to end to the lopsidedness of keeping away from the rolling element, vice seal lip is by root to tip to the lopsidedness of keeping away from first butt section.

2. A hub bearing according to claim 1, wherein: a plurality of auxiliary lips are arranged between the main sealing lip and the auxiliary sealing lip, and a gap exists between the auxiliary lips and the second abutting section to form labyrinth seal.

3. A hub bearing according to claim 2, wherein: and the second abutting section is provided with a plurality of convex blocks, and the convex blocks are positioned in the gaps between the auxiliary lip, the main sealing lip and the auxiliary sealing lip.

4. A hub bearing according to claim 2 or 3, wherein: and an accommodating ring groove is arranged between the main sealing lip and the adjacent auxiliary lip, and an elastic ring is arranged in the accommodating ring groove.

5. A hub bearing according to claim 4, wherein: the auxiliary lip and the convex block are obliquely arranged, and the oblique direction of the auxiliary lip is consistent with that of the auxiliary sealing lip.