CN214450011U

CN214450011U - Wheel end assembly and vehicle

Info

Publication number: CN214450011U
Application number: CN202120501909.0U
Authority: CN
Inventors: 田洋洋; 闫志; 王友钧; 王吉林
Original assignee: Beijing Foton Daimler Automobile Co Ltd
Current assignee: Beijing Foton Daimler Automobile Co Ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-10-22
Anticipated expiration: 2031-03-09

Abstract

The utility model discloses a wheel end assembly of vehicle, include: a hub formed with a mounting shaft hole; the hub end cover is arranged on the axial outer side of the hub and covers the end part of the mounting shaft hole; the outer bearing is arranged at the axial outer end of the mounting shaft hole; an outer stopper provided axially outside the outer bearing; the inner oil retaining piece is arranged on the axial inner side of the outer bearing so as to limit an outer bearing grease sealing space together with the hub, the hub end cover and the outer retainer; the inner bearing is arranged at the axial inner end of the mounting shaft hole; the inner oil seal piece is arranged on the axial inner side of the inner bearing; the inner oil seal piece is arranged on the oil seal seat ring; and the outer oil retaining piece is arranged on the axial outer side of the inner bearing so as to limit an inner bearing grease sealing space with the wheel hub, the inner oil seal piece and the oil seal seat ring. The wheel end assembly of the vehicle can reduce the loss of the lubricating grease of the hub bearing and prolong the service life of the hub bearing.

Description

Wheel end assembly and vehicle

Technical Field

The utility model belongs to the technical field of the automotive technology and specifically relates to a wheel end assembly and vehicle are related to.

Background

In the related technology, a pair of tapered roller bearings are respectively installed on steering knuckle spindle heads at the left wheel end and the right wheel end of a truck steering axle, and most of a hub inner bearing and a hub outer bearing are lubricated by grease and are used for forming an oil film between a tapered rolling body and a raceway so as to reduce the internal friction and damage of the bearings and further ensure the service life. When the vehicle runs, the wheel assembly rotates relative to the steering knuckle through the tapered roller bearing; meanwhile, the wheel is impacted by the road surface and acts on the hub bearing; under the influence of relative movement and interaction forces, grease tends to move, i.e. grease between the hub bearing rollers is gradually lost. If the maintenance is not timely, the bearing is worn and ablated due to oil shortage; and in severe cases, the running of the vehicle is affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a wheel end assembly, this wheel end assembly can reduce wheel hub bearing lubricating grease and run off, improves wheel hub bearing life.

The utility model also provides a vehicle.

According to the utility model discloses wheel end assembly of vehicle, include: a hub formed with a mounting shaft hole; the hub end cover is arranged on the axial outer side of the hub and covers the end part of the mounting shaft hole; the outer bearing is arranged at the axial outer end of the mounting shaft hole; an outer stopper provided axially outward of the outer bearing; an inner oil retainer disposed axially inward of the outer bearing to define an outer bearing grease seal space with the hub, the hub end cap, and the outer retainer; the inner bearing is arranged at the axial inner end of the mounting shaft hole; an inner oil seal disposed axially inward of the inner bearing; the inner oil seal piece is arranged on the oil seal seat ring; outer fender oil spare, outer fender oil spare set up in the axial outside of inner bearing, with wheel hub the interior oil seal spare with the interior bearing grease confined space is injectd to the oil blanket seat circle.

From this, keep off the oil spare in setting up, keep off the oil spare outside setting up in the axial outside of inner bearing through the axial inboard of outer bearing, inject the grease inside the grease seal space, can reduce hub bearing lubricating grease like this and run off to can improve hub bearing life.

According to some embodiments of the present invention, the inner oil blocking member is configured in a sheet shape and has a through hole in the middle; the outer oil blocking piece is of a sheet shape, and a through hole is formed in the middle of the outer oil blocking piece.

According to some embodiments of the utility model, wheel hub's axial outer end is provided with first outer step portion and the outer step portion of second, outer bearing set up in first outer step portion, interior fender oil spare set up in the outer step portion of second.

According to some embodiments of the utility model, wheel hub's axial inner is provided with step portion in first interior step portion and the second, interior bearing set up in step portion in first, keep off oil outward set up in step portion in the second.

According to some embodiments of the utility model, keep off oily spare in with wheel hub interference fit, and/or keep off oily spare outward with wheel hub interference fit.

According to some embodiments of the invention, the axially outer end face of the outer bearing has a first contact portion, the detent comprises: the second contact part is in contact fit with the first contact part, and the oil blocking part is located on the outer periphery of the second contact part and extends towards the inner circumferential surface of the hub end cover in the radial direction.

According to some embodiments of the utility model, keep off the outer peripheral face of oil portion with have the clearance between the inner peripheral surface of wheel hub end cover, the clearance is a, and 0 < a is ≤ 4 mm.

According to some embodiments of the invention, the outer bearing and the inner bearing are tapered roller bearings.

According to some embodiments of the invention, the outer stop is a stop washer.

The utility model discloses a vehicle, include wheel end assembly.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic cross-sectional structure diagram of a wheel end assembly according to an embodiment of the present invention.

Reference numerals:

a wheel end assembly 100;

a hub 10; a mounting shaft hole 11; a first outer step portion 12; a second outer step portion 13;

a first inner step portion 14; a second inner step portion 15;

a hub end cap 20; an outer bearing 30; the first contact portion 31;

an outer stopper 40; the second contact portion 41; an oil retaining portion 42; an inner oil retainer 50; a through hole 51;

an inner bearing 60; an inner oil seal 70; an oil-sealed seat ring 80; an outer oil retainer 90; an axle 200.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

A wheel end assembly 100 according to an embodiment of the present invention is described below with reference to fig. 1, the wheel end assembly 100 being applied to a vehicle.

As shown in fig. 1, a wheel end assembly 100 for a vehicle includes: hub 10, hub end cap 20, outer bearing 30, outer stop 40, inner oil retainer 50, inner bearing 60, inner oil seal 70, oil seal race 80, and outer oil retainer 90. The hub 10 is formed with a mounting shaft hole 11, a hub cover 20 is disposed axially outside the hub 10 and covers an end of the mounting shaft hole 11, an outer bearing 30 is disposed axially outside the mounting shaft hole 11, an outer stopper 40 is disposed axially outside the outer bearing 30, and an inner oil retainer 50 is disposed axially inside the outer bearing 30 to define an outer bearing 30 grease sealing space with the hub 10, the hub cover 20, and the outer stopper 40.

The inner bearing 60 is disposed at the axial inner end of the mounting shaft hole 11, the inner oil seal 70 is disposed at the axial inner side of the inner bearing 60, the inner oil seal 70 is disposed at the oil seal race 80, and the outer oil blocking member 90 is disposed at the axial outer side of the inner bearing 60 to define an inner bearing 60 grease sealing space with the hub 10, the inner oil seal 70 and the oil seal race 80.

Specifically, a mounting shaft hole 11 is provided at a central shaft of the hub 10, an outer bearing 30 is provided at an axially outer end of the mounting shaft hole 11, an inner bearing 60 is provided at an axially inner side of the mounting shaft hole 11, the outer bearing 30 and the inner bearing 60 may be the same type of bearing, then a shaft end of the axle 200 is passed through the inner bearing 60 and the outer bearing 30, further, an outer stopper 40 is provided at an outer side of the outer bearing 30, an inner oil blocking member 50 is provided at an inner side of the outer bearing 30, correspondingly, an outer oil blocking member 90 is provided at an outer side of the inner bearing 60, an inner oil sealing member 70 and an oil seal race 80 are provided at an inner side of the inner bearing 60, and the inner oil sealing member 70 is provided at the oil seal race 80. The inner bearing 60 and the outer bearing 30 can support the shaft end of the axle 200, reduce the friction coefficient in the movement process and ensure the rotation precision.

It can be understood that the bearing needs to be lubricated to reduce the friction and loss inside the bearing, and for this reason, grease needs to be added into the bearing to ensure that the grease is always present inside the bearing, so as to prolong the service life of the bearing, but when the vehicle is in a driving process, the wheel end assembly 100 rotates relative to the knuckle of the axle 200 through the bearing, and meanwhile, the wheel is subjected to the impact load of the road surface and acts on the bearing, and the grease tends to move under the influence of the relative motion and the interaction force, i.e., the grease in the bearing is rapidly lost.

According to the wheel end assembly 100 of the present invention, the grease-tight space of the outer bearing 30 is defined by the inner oil baffle 50, the hub 10, the hub cover 20 and the outer stopper 40, and an inner bearing 60 grease-tight space is defined by the outer oil retainer 90, the hub 10, the inner oil seal 70 and the oil-tight seat ring 80, thus, the grease-sealed space of the outer bearing 30 can ensure that the grease in the outer bearing 30 cannot be rapidly lost from the interior of the outer bearing 30, the grease-sealed space of the inner bearing 60 can ensure that the grease in the inner bearing 60 cannot be rapidly lost from the interior of the inner bearing 60, thereby reducing the loss of the lubricating grease in the bearing, prolonging the service life of the outer bearing 30 and the inner bearing 60, ensuring that the lubricating grease is always in the bearing, the occurrence of failure such as abrasion and ablation of the bearing due to oil shortage can be reduced, and the reliability of the wheel end assembly 100 can be improved.

Specifically, as shown in fig. 1, the inner oil deflector 50 is configured in a sheet shape and provided with a through hole 51 at the center, and the outer oil deflector 90 is configured in a sheet shape and provided with a through hole 51 at the center. The through hole 51 is arranged to allow the axle end of the axle 200 to pass through, and the outer oil baffle 90 is arranged to be a sheet structure, so that the occupied space is small, and the structure of the wheel end assembly 100 can be more compact.

In the embodiment of the present invention, as shown in fig. 1, the axially outer end of the hub 10 is provided with a first outer step portion 12 and a second outer step portion 13, the outer bearing 30 is provided on the first outer step portion 12, and the inner oil blocking member 50 is provided on the second outer step portion 13. Through setting up first outer step portion 12, can be so that the inner space at outer bearing 30 place is bigger, the installation and the heat dissipation of outer bearing 30 of being convenient for, the setting of second outer step portion 13 can be so that interior fender oil 50 installs in second outer step portion 13 department.

Correspondingly, as shown in fig. 1, the axial inner end of the hub 10 is provided with a first inner step portion 14 and a second inner step portion 15, the inner bearing 60 is provided at the first inner step portion 14, and the outer oil retainer 90 is provided at the second inner step portion 15. Through setting up first interior step 14, can be so that the inner space at inner bearing 60 place is bigger, the installation and the heat dissipation of inner bearing 60 of being convenient for, and the setting of step 15 in the second can be so that outer fender oil 90 installs step 15 in the second.

In the practice of the present invention, the inner oil retaining member 50 is in interference fit with the hub 10, and/or the outer oil retaining member 90 is in interference fit with the hub 10. That is to say, interior fender oil spare 50 and outer fender oil spare 90 can all take interference fit's mode to be connected, also can take and keep off oil spare 50 with wheel hub 10 interference fit or keep off oil spare 90 with wheel hub 10 interference fit outward in also can adopting, keep off the gas tightness that oil spare 50 or outer fender oil spare 90 and wheel hub 10 assembled in can guaranteeing through interference fit to guarantee that the lubricating grease in the bearing can not run off in the cavity of wheel hub 10.

According to an embodiment of the present invention, as shown in fig. 1, the axially outer end face of the outer bearing 30 has a first contact portion 31, and the outer stopper 40 includes: the second contact portion 41 is in contact fit with the first contact portion 31, and the oil blocking portion 42 is located on the outer periphery of the second contact portion 41 and extends in the radial direction toward the inner peripheral surface of the hub cover 20. The contact fit between the first contact portion 31 and the second contact portion 41 can ensure that the outer stop member 40 does not move outward in the axial direction, thereby providing a precondition for creating a grease-tight space for the outer bearing 30. The oil dam 42 may allow the outer bearing 30 to obtain a relatively sealed grease-tight space.

In detail, as shown in fig. 1, a gap is formed between the outer circumferential surface of the oil blocking portion 42 and the inner circumferential surface of the hub cover 20, and the gap is a, where 0 < a ≦ 4 mm. That is, the outer peripheral surface of the oil blocking portion 42 is spaced from the inner peripheral surface of the hub cover 20 by a predetermined distance, but the distance is preferably not more than 4mm, so that the grease can be restricted from flowing out of the outer bearing 30.

In an embodiment of the present invention, the outer bearing 30 and the inner bearing 60 are tapered roller bearings. Since the axle is subjected to a combined load of an axial load and a radial load when the vehicle is turning, the combined load can be applied to the axle 200 in one direction by providing the bearings as tapered roller bearings, so that the service life of the axle 200 can be improved.

According to an embodiment of the present invention, the outer stopper 40 is a stop washer. The thin thickness of the stopper washer can act as a grease barrier and also make the connection between the hub cover 20 and the hub 10 more stable.

The utility model discloses a vehicle, including the wheel end assembly 100 of above-mentioned embodiment. The vehicle with the wheel end assembly 100 is safer in running, and the maintenance cost of the axle 200 is lower.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element 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, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wheel end assembly for a vehicle, comprising:

a hub formed with a mounting shaft hole;

the hub end cover is arranged on the axial outer side of the hub and covers the end part of the mounting shaft hole;

the outer bearing is arranged at the axial outer end of the mounting shaft hole;

an outer stopper provided axially outward of the outer bearing;

an inner oil retainer disposed axially inward of the outer bearing to define an outer bearing grease seal space with the hub, the hub end cap, and the outer retainer;

the inner bearing is arranged at the axial inner end of the mounting shaft hole;

an inner oil seal disposed axially inward of the inner bearing;

the inner oil seal piece is arranged on the oil seal seat ring;

outer fender oil spare, outer fender oil spare set up in the axial outside of inner bearing, with wheel hub the interior oil seal spare with the interior bearing grease confined space is injectd to the oil blanket seat circle.

2. The wheel end assembly of a vehicle according to claim 1, wherein the inner oil retainer is configured in a sheet shape with a through hole provided in a middle portion; the outer oil blocking piece is of a sheet shape, and a through hole is formed in the middle of the outer oil blocking piece.

3. The wheel end assembly of a vehicle of claim 1, wherein an axially outer end of the wheel hub is provided with a first outer step portion and a second outer step portion, the outer bearing is provided at the first outer step portion, and the inner oil retainer is provided at the second outer step portion.

4. The wheel end assembly of a vehicle of claim 1, wherein an axially inner end of the wheel hub is provided with a first inner step portion and a second inner step portion, the inner bearing being provided at the first inner step portion, the outer oil retainer being provided at the second inner step portion.

5. The wheel end assembly of a vehicle of claim 1, wherein the inner oil retainer is an interference fit with the hub and/or the outer oil retainer is an interference fit with the hub.

6. The wheel end assembly of a vehicle of claim 1, wherein an axially outer end face of the outer bearing has a first contact portion, the outer stop comprising: the second contact part is in contact fit with the first contact part, and the oil blocking part is located on the outer periphery of the second contact part and extends towards the inner circumferential surface of the hub end cover in the radial direction.

7. The wheel end assembly of claim 6, wherein a clearance is provided between the outer circumferential surface of the oil retainer and the inner circumferential surface of the hub cap, wherein a is greater than 0 and less than or equal to 4 mm.

8. The wheel end assembly of a vehicle of claim 1, wherein the outer bearing and the inner bearing are both tapered roller bearings.

9. The wheel end assembly of a vehicle of claim 1, wherein the outer stop is a check washer.

10. A vehicle comprising a wheel end assembly of the vehicle of any of claims 1-9.