CN215110065U

CN215110065U - Double-row conical hub bearing unit

Info

Publication number: CN215110065U
Application number: CN202120503983.6U
Authority: CN
Inventors: 承军伟; 赵兴新; 徐金国; 刘海波; 熊磊
Original assignee: Chongqing Changjiang Bearing Co Ltd
Current assignee: Chongqing Changjiang Bearing Co Ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-12-10
Anticipated expiration: 2031-03-09

Abstract

The utility model discloses a double-row tapered wheel hub bearing unit, which comprises a flange outer ring and a flange inner ring, wherein the matched part of the flange inner ring and the flange outer ring is a stepped shaft structure, the stepped shaft structure comprises a first step part and a second step part, the diameter of the second step part is larger than that of the first step part, the first step part is sleeved with a first small inner ring, the periphery of the first small inner ring is distributed with first tapered rollers, the second step part is sleeved with a second small inner ring, the periphery of the second small inner ring is distributed with second tapered rollers, the diameter of the second tapered rollers is larger than that of the first tapered rollers, one end of the first small inner ring is supported on the spin riveting part of an inner ring body, the other end of the first small inner ring abuts against a step between the first step part and the second step part, one end of the second small inner ring abuts against the end part of the first small inner ring, and the other end of the second small inner ring abuts against a step between the second step part and the inner ring body; and a gear ring is sleeved on the second small inner ring and is positioned between the first tapered roller and the second tapered roller.

Description

Double-row conical hub bearing unit

Technical Field

The utility model relates to a bearing technical field, concretely relates to double-row conical hub bearing unit.

Background

With the improvement of living standard of people, automobiles become indispensable transportation means in working and living of people, and especially large-scale business automobiles (motor homes), light business automobiles and cross-country pick-up automobiles are more and more favored by the market. The hub bearing is an important part for bearing, rotating and supporting a commercial automobile, and the performance of the hub bearing directly influences the performance of the automobile.

The hub bearing unit used by the commercial truck has the characteristics of high bearing capacity and no maintenance, but the rotating speed of the hub bearing unit cannot meet the requirement of the commercial truck. Although the hub bearing unit of the passenger car can meet the requirements of commercial cars in terms of speed, the hub bearing unit has high bearing capacity and is free of maintenance and is subject to the problems of users. Most of the existing engineering adopts a generation of conical hub bearings to be pressed into a hub disc and a steering knuckle to realize the function of bearing transmission, the structural installation is complex, the bearing capacity is weak, the service life is short, the maintenance is difficult, the economic applicability is poor, and the performance requirements of light weight and integration of a hub bearing unit are not favorably realized.

Disclosure of Invention

To the technical problem that exists at present, the utility model provides a double-row circular cone wheel hub bearing unit to solve the problem among the prior art.

In order to achieve the purpose of the invention, the utility model provides the following technical scheme:

a double-row tapered hub bearing unit comprises a flange outer ring and a flange inner ring, wherein the part of the flange inner ring matched with the flange outer ring is of a stepped shaft structure, the stepped shaft structure comprises a first stepped part and a second stepped part, the diameter of the second stepped part is larger than that of the first stepped part, a first small inner ring is sleeved on the first stepped part, a plurality of first tapered rollers are uniformly distributed on the periphery of the first small inner ring, a second small inner ring is sleeved on the second stepped part, a plurality of second tapered rollers are uniformly distributed on the periphery of the second small inner ring, the diameter of the second tapered rollers is larger than that of the first tapered rollers, the radial distance from the center of the second tapered rollers to the flange inner ring is larger than that from the center of the first tapered rollers to the flange inner ring, and one end of the first small inner ring is supported on a spin riveting part of an inner ring body, the other end of the second small inner ring abuts against a step between the first step part and the second step part, one end of the second small inner ring abuts against the end part of the first small inner ring, and the other end of the second small inner ring abuts against the step between the second step part and the inner ring body;

and a gear ring is further sleeved on the second small inner ring and is positioned in a gap between the first conical roller and the second conical roller.

According to the technical scheme, the flange outer ring is connected with the steering knuckle, the flange inner ring is connected with the wheel through the flange inner ring, the flange inner ring adopts a stepped shaft structure, the layout space of a hub bearing is reasonably utilized, the second small inner ring is conveniently pressed on a stepped shaft of the flange inner ring, the problems of poor press-mounting parallelism and difficulty in press-mounting due to too long press-mounting stroke of the second inner ring are solved, the press-mounting efficiency and the press-mounting qualification rate of the second small inner ring are improved, the strength of the flange inner ring is effectively improved due to the arrangement of the first stepped part and the second stepped part, the local stress is reduced, the requirement of using the product on a commercial vehicle is met, and the risk of fracture of the flange inner ring due to too large stress is avoided; meanwhile, the arrangement mode of the first tapered roller and the second tapered roller can better meet the stress condition of the bearing in use, and the bearing capacity of the bearing is effectively improved.

Preferably, the flange outer ring comprises an outer ring body, three connecting lugs are uniformly distributed on the circumferential direction of the outer ring body, and each connecting lug is provided with a first connecting hole which extends along the axial direction of the outer ring body;

the outer ring body is provided with a sensor mounting part which extends outwards along the radial direction of the outer ring body, a sensor mounting hole and a sensor fixing hole are formed in the sensor mounting part, and the sensor mounting hole is opposite to the gear ring.

So set up, cooperate through the mounting means of built-in ring gear and sensor, can read the sensor signal better to discernment wheel speed.

Preferably, the number of the second tapered rollers is larger than the number of the first tapered rollers.

So set up, further improve bearing performance.

Preferably, the step between the first step portion and the second step portion and the step between the second step portion and the inner ring body are connected in a circular arc smooth transition mode.

So set up, can effectively reduce stress concentration, avoid the connection part to fracture because of the stress is too big.

Preferably, a plurality of reinforcing ribs are arranged on the end face, back to the connection between the flange inner ring and the wheel, and are uniformly distributed around the circumferential direction of the inner ring body, and second connecting holes are formed in the reinforcing ribs and extend along the axial direction of the inner ring body. So set up, improve the steadiness with wheel connection, also improved the bulk strength of flange inner circle.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a flange outer lane is connected with the knuckle, through flange inner circle and wheel connection, the flange inner circle adopts the step shaft structure, the rational utilization wheel hub bearing layout space, be convenient for the little inner circle of second pressure equipment to the step of flange inner circle epaxially, avoided the pressure equipment stroke of second inner circle too long and lead to the poor and difficult problem of pressure equipment parallelism, improved the efficiency and the qualification rate of the pressure equipment of the little inner circle of second, and effectively improved the intensity of flange inner circle, reduced local stress, avoided the flange inner circle because of the cracked risk of atress too big; meanwhile, the arrangement mode of the first tapered roller and the second tapered roller can better meet the stress condition of the bearing in use, and the bearing capacity of the bearing is effectively improved. The hub bearing unit has the advantages of simple and compact integral structure, convenience in maintenance and good economical efficiency, and meets the performance requirements of light weight and integration of the hub bearing unit.

Description of the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a schematic structural view of the outer ring of the flange in FIG. 1;

fig. 4 is a schematic structural view of the inner ring of the flange in fig. 1.

Detailed Description

The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The double-row conical hub bearing unit shown in the attached drawings 1-4 comprises a flange outer ring 1 and a flange inner ring 2, wherein the flange outer ring 1 comprises an outer ring body 10, three connecting lugs 11 are uniformly distributed in the circumferential direction of the outer ring body 10, the connecting lugs 11 extend outwards along the radial direction of the outer ring body 10, adjacent connecting lugs 11 are connected through arc-shaped reinforcing ribs, each connecting lug 11 is provided with a first connecting hole 12, the first connecting holes 12 extend along the axial direction of the outer ring body 10, and the first connecting holes 12 are connected with a universal joint in the using process.

The outer ring body 10 is provided with a sensor mounting part 13 extending outwards along the radial direction of the outer ring body, the sensor mounting part 13 is provided with a sensor mounting hole 14 and a sensor fixing hole 15, and the sensor mounting hole 14 is opposite to the position of the gear ring 7, so that data of the gear ring 7 can be directly read to identify the rotating speed of the wheel.

The flange inner ring 2 comprises an inner ring body 20, one end of the inner ring body 20 is connected with a wheel, six reinforcing ribs 21 are arranged on the end face, back to the flange inner ring 2, connected with the wheel, the six reinforcing ribs 21 are uniformly distributed around the circumferential direction of the inner ring body 20, second connecting holes 22 are formed in the reinforcing ribs 21, the second connecting holes 22 extend along the axial direction of the inner ring body 20, and bolts are arranged in the second connecting holes 22 and connected with the wheel.

The part of the flange inner ring 2 matched with the flange outer ring 1 is of a stepped shaft structure, the stepped shaft structure comprises a first stepped part 23 and a second stepped part 24, the diameter of the second step portion 24 is larger than that of the first step portion 23, the first small inner ring 3 is sleeved on the first step portion 23 in an interference fit manner, a plurality of first tapered rollers 5 are uniformly distributed on the periphery of the first small inner ring 3, a second small inner ring 4 is sleeved on the second step part 24 in an interference fit manner, a plurality of second tapered rollers 6 are uniformly distributed on the periphery of the second small inner ring 4, the diameter of each second tapered roller 6 is larger than that of each first tapered roller 5, and the radial distance from the center of the second tapered roller 6 to the flange inner ring 2 is greater than the radial distance from the center of the first tapered roller 5 to the flange inner ring 2, and the number of the second tapered rollers 6 is greater than the number of the first tapered rollers 5.

One end of the first small inner ring 3 is abutted to the rivet rotating portion 25 of the inner ring body 20, the other end of the first small inner ring is abutted to the step between the first step portion 23 and the second step portion 24, one end of the second small inner ring 4 is abutted to the end portion of the first small inner ring 3, the other end of the second small inner ring is abutted to the step between the second step portion 24 and the inner ring body 20, axial movement of the first small inner ring 3 and the second small inner ring 4 is limited, the step between the first step portion 23 and the second step portion 24 and the step between the second step portion 24 and the inner ring body 20 are connected in a circular arc smooth transition mode, stress concentration can be reduced, and breakage of the connecting portion due to overlarge stress is avoided.

The second small inner ring 4 is also sleeved with a gear ring 7, the gear ring 7 is positioned in a gap between the first tapered roller 5 and the second tapered roller 6, and the sensor is opposite to the gear ring 7. Other connections not specifically described may be used as is known in the art.

The flange outer lane 1 of this patent directly links to each other with the knuckle to integrated sensor mounted position reads the wheel speed, and simple structure is compact, easy maintenance, and economic nature is good. The flange inner ring 2 adopts the reinforcing rib type structural layout, the weight is reduced, the material is saved, the wheel speed gear ring is integrated on the second small inner ring 4, the double-row tapered rollers are arranged in the wheel speed gear ring, and the wheel speed gear ring has the characteristics of high bearing capacity and suitability for harsh vehicle road conditions. Meanwhile, the aims of high integration, light weight and low cost of the commercial vehicle hub bearing unit are fulfilled.

The foregoing describes preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a double-row tapered hub bearing unit, includes flange outer lane (1) and flange inner circle (2), its characterized in that: the flange inner ring (2) and the flange outer ring (1) are matched in a stepped shaft structure, the stepped shaft structure comprises a first stepped portion (23) and a second stepped portion (24), the diameter of the second stepped portion (24) is larger than that of the first stepped portion (23), a first small inner ring (3) is sleeved on the first stepped portion (23), a plurality of first tapered rollers (5) are uniformly distributed on the periphery of the first small inner ring (3), a second small inner ring (4) is sleeved on the second stepped portion (24), a plurality of second tapered rollers (6) are uniformly distributed on the periphery of the second small inner ring (4), the diameter of the second tapered rollers (6) is larger than that of the first tapered rollers (5), and the radial distance from the center of the second tapered rollers (6) to the flange inner ring (2) is larger than the radial distance from the center of the first tapered rollers (5) to the flange inner ring (2), one end of the first small inner ring (3) abuts against a spin riveting part (25) of the inner ring body (20), the other end of the first small inner ring abuts against a step between the first step part (23) and the second step part (24), one end of the second small inner ring (4) abuts against the end part of the first small inner ring (3), and the other end of the second small inner ring abuts against a step between the second step part (24) and the inner ring body (20);

and a gear ring (7) is further sleeved on the second small inner ring (4), and the gear ring (7) is positioned in a gap between the first conical roller (5) and the second conical roller (6).

2. The double row conical hub bearing unit of claim 1, wherein: the flange outer ring (1) comprises an outer ring body (10), three connecting lugs (11) are uniformly distributed on the circumferential direction of the outer ring body (10), each connecting lug (11) is provided with a first connecting hole (12), and the first connecting holes (12) extend along the axial direction of the outer ring body (10);

the outer ring body (10) is provided with a sensor mounting part (13) which extends outwards along the radial direction of the outer ring body, the sensor mounting part (13) is provided with a sensor mounting hole (14) and a sensor fixing hole (15), and the sensor mounting hole (14) is just opposite to the gear ring (7).

3. The double row conical hub bearing unit of claim 1, wherein: the number of the second tapered rollers (6) is greater than the number of the first tapered rollers (5).

4. Double row conical hub bearing unit according to any of claims 1-3, wherein: the step between the first step part (23) and the second step part (24) and the step between the second step part (24) and the inner ring body (20) are connected in a circular arc smooth transition mode.

5. The double row conical hub bearing unit of claim 1, wherein: the end face, back to the flange inner ring (2), connected with the wheel is provided with a plurality of reinforcing ribs (21), the reinforcing ribs (21) are uniformly distributed around the circumferential direction of the inner ring body (20), the reinforcing ribs (21) are provided with second connecting holes (22), and the second connecting holes (22) extend along the axial direction of the inner ring body (20).