CN217124426U - Positioning adjustment spacer bush of hub unit and hub unit - Google Patents

Abstract

The utility model discloses a positioning adjustment spacer bush of a hub unit and the hub unit, wherein the spacer bush comprises a cylindrical body with uniform wall thickness, and two ends of the body are parallel to each other and are both in a ring shape; one end of the body is smoothly contracted inwards, so that the outer diameter of the end is smaller than that of the other end of the body to form a necking end; the necking end is a cylindrical opening which is concentric with the circumferential wall of the body and parallel to the tangent vector; the body forms a first circular arc and a second circular arc in the process of transition to the necking end. By arranging the necking end and arranging the arc transition at the necking end, the two ends of the spacer bush have certain compression deformation capacity after being installed and locked, and the bearing clearance is convenient to adjust; when the bearing clearance is increased, the clearance can be adjusted again through the locking nut; the spacer sleeve adopts a thermal expansion coefficient larger than that of the bearing, so that the reduction of the bearing clearance can be avoided to a certain extent, the proper pretightening force is kept, the service lives of the bearing and the spacer sleeve can be prolonged, and the use effect of the spacer sleeve is improved.

Description

Positioning adjustment spacer bush of hub unit and hub unit

Technical Field

The utility model belongs to the technical field of the wheel hub unit, concretely relates to wheel hub unit spacer and wheel hub unit.

Background

In the technical field of wheel hub units of heavy truck, no positioning part is arranged between wheel hub bearings, the locking nut is fastened and then the bearing clearance is adjusted by rotating, the operation technology difficulty is high, and the bearing clearance is not easy to control. The rotation amount of the locking nut is not easy to control, so that the requirement on the working capacity of technicians is increased, and bearing faults are easily caused once the rotation amount is too large or too small. Once bearing failure occurs, great risk is brought to driving safety; and the maintenance cost is high and the repair process is complex.

In the prior art, although some of the prior art also relates to the spacer applied to the hub, the contact between the spacer and the bearing in the prior art is hard contact, and the structure has the following disadvantages: firstly, the hard contact causes no space for compression and deformation between the spacer bush and the bearing, the clearance between the hub bearings can be adjusted only through the locking nut, and the self-adaptive adjustment of the clearance between the hub bearings cannot be realized; secondly, due to the different thermal expansion coefficients between the spacer bush and the bearing, when the hub generates heat, it is difficult to ensure that the extension of the spacer bush can be exactly equal to the clearance variable between the bearings, if the extension of the spacer bush is too large, the spacer bush and the bearing are damaged, and if the extension of the spacer bush is too small, the reduction of the bearing clearance cannot be prevented, so that in conclusion, the spacer bush in the prior art is difficult to realize accurate deformation due to the lack of 'absorption' of redundant deformation; thirdly, it is obvious that hard contact can harm the service life of the bearing and the spacer bush, and influence the use effect of the spacer bush.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a spacer sleeve is adjusted in location of wheel hub unit can realize the internal and external location of wheel hub unit and the play between the adjustment bearing easily. The utility model discloses a realize through following technical scheme:

a positioning and adjusting spacer bush of a hub unit comprises a cylindrical body with uniform wall thickness, wherein two ends of the body are parallel to each other and are both circular rings;

one end of the body is smoothly contracted inwards, so that the outer diameter of the end is smaller than that of the other end of the body to form a necking end; the necking end is a cylindrical opening which is concentric with the circumferential wall of the body and parallel to the tangent vector; the body forms a first arc and a second arc in the process of transition to the necking end.

Further, the first arc is connected between the body and the second arc, so that the peripheral wall of the body extends towards the second arc in a transition way along the first arc, and the convex surface of the first arc faces the outer side of the body;

the second arc is connected between the first arc and the necking end, so that the peripheral wall of the body continues to extend along the second arc until the necking end is formed at the tail end of the second arc, and the convex surface of the second arc faces the inner side of the body.

Further, the central angle of the first circular arc and the second circular arc is 5-50 degrees.

Further, the spacer bush is a metal spacer bush with the surface subjected to oxidation treatment.

Further, the spacer bush is a polyurethane spacer bush.

Further, the coefficient of thermal expansion of the spacer is greater than the coefficient of thermal expansion of the bearings in the hub unit.

The utility model also provides a hub unit, which comprises a hub, an inner bearing, an outer bearing, a hub shaft, a locking nut and the positioning adjusting spacer bush, wherein the outer rings of the inner bearing and the outer bearing are arranged on the hub; the inner ring of the inner bearing is arranged on the hub shaft; the spacer bush is sleeved on the hub shaft, and the necking end of the spacer bush faces outwards; the hub is mounted on the hub shaft after being assembled with the bearing outer ring, and the outer bearing inner ring is mounted on the shaft diameter of the hub shaft.

Compared with the prior art, the utility model, its useful part lies in:

(1) and a spacer bush is added between the bearings of the hub unit, so that the positioning difficulty and the bearing clearance adjustment difficulty between the bearings are reduced.

(2) One end of the spacer bush adopts a necking structure, 2 circular arc transitions are arranged at the necking end, and the 2 circular arcs ensure that the spacer bush has certain compression deformation capacity after being installed and locked at two ends, so that the self-adaptive adjustment of the hub bearing clearance is facilitated; when the vehicle runs for a period of time, the hub bearing clearance is increased, and the clearance can be adjusted again through the locking nut.

(3) The spacer bush is made of metal or polyurethane, and the thermal expansion coefficient of the spacer bush is larger than that of the bearing, so that the bearing play can be prevented from being reduced to a certain extent, and the proper pretightening force can be kept; in accordance with the method, 2 circular arcs are arranged at the necking end for transition, so that after the spacer bush is heated and expanded, the redundant deformation quantity of the spacer bush after thermal expansion is absorbed.

(4) Through set up 2 circular arc transitions at the throat end, make the contact between spacer and the bearing be elastic contact, prolonged the life of bearing and spacer, improved the result of use of spacer.

Drawings

Fig. 1 is a sectional view of a spacer 3 according to an embodiment of the present invention;

fig. 2 is a perspective view of the spacer 3 provided by the present invention;

fig. 3 is a three-dimensional cross-sectional view of the hub unit provided by the present invention;

wherein, 1, a hub; 2 an inner bearing; 3, spacer bush; 4 an outer bearing; 5 a hub shaft; 6, locking a nut; 7 a first arc; 8 second circular arc.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. In the following description, specific details are provided, such as specific configurations and components, merely to facilitate a thorough understanding of embodiments of the invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted in the embodiments for the sake of clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrase "one embodiment" or "the present embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

To the utility model discloses an oil blanket structure is front axle waterproof oil blanket, is applicable to the occasion that protects to hub oil blanket unit, to conventional oil blanket structure the utility model discloses no longer detailed description.

Example 1

With reference to fig. 1-2, the present embodiment provides a spacer 3 for positioning and adjusting a hub unit, where the spacer 3 is an integrally formed structure and includes a cylindrical body with uniform wall thickness, and two ends of the cylindrical body are parallel to each other and are both circular rings.

Furthermore, one end of the body is smoothly and inwardly contracted, so that the outer diameter of the end is smaller than that of the other end of the body, a necking end is formed, and the necking end is a cylindrical opening which is parallel to the concentric tangent vector of the peripheral wall of the body.

Two smooth circular arcs, namely a first circular arc 7 and a second circular arc 8, are formed in the process that the body is transited to the necking end; the first arc 7 extends towards the second arc 8 along the peripheral wall of the body in a transition way, and the convex surface of the first arc 7 faces the outer side of the body; the second circular arc 8 extends towards the necking end along the first circular arc 7 in a transition mode, and the convex surface of the second circular arc 8 faces the inner side of the body.

Preferably, the central angle of the first circular arc 7 and the second circular arc 8 is 5 ° to 50 °.

Further, the coefficient of thermal expansion of the spacer 3 is larger than the coefficient of thermal expansion of the bearings in the hub unit.

Preferably, the spacer 3 is made of metal, and the surface of the spacer is subjected to oxidation treatment; or the spacer bush is made of polyurethane.

Example 2

As shown in fig. 3, the present embodiment provides a hub unit using the spacer 3 according to embodiment 1 of the present invention, the hub unit includes a hub 1, an inner bearing 2, an outer bearing 4, a hub shaft 5, a lock nut 6 and the spacer 3 according to embodiment 1 of the present invention; the outer rings of the inner bearing 2 and the outer bearing 4 are arranged on the hub 1; the inner ring of the inner bearing 2 is mounted on the hub shaft 5; the spacer bush 3 is sleeved on the hub shaft 5, and the necking end of the spacer bush 3 faces outwards; the hub is assembled with the bearing outer ring and then is arranged on the hub shaft 5, and the inner ring of the outer bearing 4 is arranged on the shaft diameter of the hub shaft 5. When the bearing is used, the fastening nut 6 is used for fastening, and the fastening nut is locked after the inner bearing and the outer bearing tightly push the spacer sleeve and the bearing clearance is properly adjusted.

In the use process, the spacer sleeves are additionally arranged in the hub unit, so that the positioning between the bearings and the adjustment of the bearing clearance are easily realized. One end of the spacer bush adopts a necking structure, and 2 circular arc transitions are arranged at the necking end, so that the spacer bush has certain compression deformation capacity after being mounted and locked at two ends, and the self-adaptive adjustment of the hub bearing clearance is facilitated; meanwhile, when the vehicle runs for a period of time, the wheel hub bearing clearance is increased, the clearance can be adjusted again through the locking nut. The spacer bush is made of metal or polyurethane, the thermal expansion coefficient of the spacer bush is larger than that of the bearing, the bearing play can be prevented from being reduced to a certain degree, appropriate pretightening force is kept, and after the spacer bush is heated and expanded, redundant deformation after the spacer bush is thermally expanded is absorbed.

It is specifically intended that relational terms such as first and second, and the like, in the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (6)

1. A positioning and adjusting spacer bush of a hub unit is characterized in that the positioning and adjusting spacer bush (3) comprises a cylindrical body with uniform wall thickness, and two ends of the body are parallel to each other and are both circular rings;

one end of the body is smoothly contracted inwards, so that the outer diameter of the end is smaller than that of the other end of the body to form a necking end; the necking end is a cylindrical opening which is concentric with the circumferential wall of the body and parallel to the tangent vector; a first circular arc (7) and a second circular arc (8) are formed in the process that the body is transited to the necking end.

2. A hub unit spacer according to claim 1, wherein the first circular arc (7) is connected between the body and the second circular arc (8) such that the body peripheral wall extends transitionally along the first circular arc (7) to the second circular arc (8) with the convex surface of the first circular arc (7) facing the outside of the body;

the second arc (8) is connected between the first arc (7) and the necking end, so that the peripheral wall of the body continues to extend along the second arc (8) until the necking end is formed at the tail end of the second arc (8), and the convex surface of the second arc (8) faces the inner side of the body.

3. A hub unit spacer according to claim 1, wherein the first circular arc (7) and the second circular arc (8) have a central angle of 5 ° to 50 °.

4. The hub unit spacer according to claim 1, wherein the spacer (3) is a metal spacer having an oxidized surface.

5. A hub unit position adjustment spacer according to claim 1, wherein the position adjustment spacer (3) is a polyurethane spacer.

6. A hub unit comprising a wheel hub (1), an inner bearing (2), an outer bearing (4), a hub axle (5) and a lock nut (6), characterized in that it further comprises a position adjusting spacer (3) according to any one of claims 1-5, the outer rings of the inner bearing (2) and the outer bearing (4) being mounted on the wheel hub (1); the inner ring of the inner bearing (2) is arranged on the hub shaft (5); the positioning adjusting spacer bush (3) is sleeved on the hub shaft (5), and the necking end of the positioning adjusting spacer bush (3) faces outwards; the hub is assembled with the bearing outer ring and then is arranged on the hub shaft (5), and the inner ring of the outer bearing (4) is arranged on the shaft diameter of the hub shaft (5).

Images