Patent ID: 12202349

DETAILED DESCRIPTION

Hereinafter, a wheel structure and a vehicle according to the present disclosure will be described with reference to the drawings.

Wheel Structure

FIG.1is an exploded perspective view illustrating a structure of a wheel structure according to the present disclosure, andFIG.2is a first cross-sectional view schematically illustrating a cross-sectional structure of the wheel structure according to the present disclosure.FIG.3is a cross-sectional view illustrating enlarged cross-sectional structures of a wheel bearing and peripheral components provided in the wheel structure according to the present disclosure, andFIG.4is a second cross-sectional view illustrating a cross-sectional structure of the wheel structure according to the present disclosure. In addition,FIG.5is a perspective view illustrating a hub bearing provided in the wheel structure according to the present disclosure.

As illustrated inFIGS.1to4, a wheel structure10according to the present disclosure may include a wheel100disposed in an outer region of the wheel structure10in a radial direction R, a rotary part200disposed inside the wheel100in the radial direction R and configured to rotate together with the wheel100, a fixing part300disposed to face the rotary part200in the radial direction R, and a hub bearing500disposed at one side of the rotary part200and the fixing part300. In more detail, the wheel structure10according to the present disclosure may include a motor configured to provide a rotational force. The motor may include the rotary part200and the fixing part300.

Meanwhile, the hub bearing500may include a hub body510fixedly coupled to the rotary part200, a hub outer race520fixedly coupled to the fixing part300, one or more rolling elements540disposed between the hub body510and the hub outer race520in the radial direction R, and a hub inner race530press-fitted with the hub body510and disposed to face the rolling elements400.

In more detail, the rotary part200may include a rotor housing210fixedly coupled to an inner portion of the wheel100in the radial direction R, and a rotor220fixedly coupled to an inner portion of the rotor housing210in the radial direction R. In addition, the fixing part300may include a stator housing310fixedly coupled to an outer portion of the hub outer race520in the radial direction R, and a stator320fixedly coupled to an outer portion of the stator housing310in the radial direction R. In addition, the rotor220and the stator320may be disposed to face each other in the radial direction R.

Meanwhile, as illustrated inFIG.3, the hub body510may include a first region512disposed to face the hub outer race520in the radial direction R, and a second region514fixedly coupled to one side of the first region512in an axial direction A of the wheel structure10. For example, as illustrated inFIG.3, the second region514may have a structure press-fitted with the first region512in the axial direction A. Alternatively, the second region514may be integrated with the first region512. Meanwhile, the second region514may protrude from the first region512in the axial direction A. In more detail, a part of the second region514may protrude from the first region512in the axial direction A. The first region512may have a concave portion that may provide a space for accommodating the second region514.

Meanwhile, the hub inner race530may face the second region514with the first region512interposed therebetween. In addition, the hub body510may have a forming region512adisposed at an outer side in the axial direction A of the hub body510and bent toward the hub inner race530to surround the hub inner race530. The forming region512amay be configured to press the hub inner race530to fix the hub inner race530to the hub body510.

Continuing to refer toFIGS.1to5, the wheel structure10according to the present disclosure may include a resolver600disposed to face the hub bearing500and configured to detect a position of the hub bearing500. The resolver600may be configured to detect the position of the hub bearing500and thus detect a position of the rotary part200. The description of the operational principle of the resolver600will be replaced with the contents disclosed in the related art.

In more detail, the resolver600may include a resolver rotor610and a resolver stator620. The resolver rotor610may be fixedly coupled to the hub body510. Therefore, the resolver rotor610may be fixed relative to the rotary part200. More particularly, the resolver rotor610may be fixedly coupled to an outer portion of the second region514in the radial direction R.

Alternatively, the resolver stator620may be fixed relative to the fixing part300. In more detail, the wheel structure10may further include a cap member700fixedly coupled to one side of the hub outer race520in the axial direction A. In this case, the resolver stator620may be coupled and disposed inside the cap member700. In addition, the resolver stator620may be provided outside the resolver rotor610in the radial direction R and disposed to face the resolver rotor610. Meanwhile,FIG.3illustrates that the forming region512ais disposed inside the cap member700. In more detail, the forming region512amay be disposed inside the cap member700in the axial direction A and the radial direction R.

Continuing to refer toFIG.3, the wheel structure10according to the present disclosure may further include a speed sensor800configured to detect a rotational speed of the hub bearing500. In this case, the speed sensor800may be disposed inside the cap member700. For example, the speed sensor800may be disposed in a space between the hub body510and the hub outer race520in the radial direction R.

In addition, the wheel structure10may further include a connector900electrically connected to the resolver600and configured to supply electric power to the resolver600. For example, as illustrated inFIG.3, the connector900may be inserted and coupled into the cap member700.

FIG.6is a side view illustrating a structure for coupling the wheel bearing and a bracket in the wheel structure according to the present disclosure, andFIG.7is a side view illustrating a structure for coupling the wheel bearing, the bracket, and the carrier in the wheel structure according to the present disclosure.

Continuing to refer toFIGS.1to7, the wheel structure10according to the present disclosure may further include a bracket1000fixedly coupled to the hub outer race520and the stator housing310. That is, as illustrated in the drawings, an inner region in the radial direction R of the bracket1000may be fixedly coupled to the hub outer race520, and an outer region in the radial direction R of the bracket1000may be fixedly coupled to the stator housing310.

More particularly, the inner region in the radial direction R of the bracket1000may be coupled to the hub outer race520by bolting, and the outer region in the radial direction R of the bracket1000may be coupled to the stator housing310by bolting.

In addition, the wheel structure10according to the present disclosure may further include a carrier1100fixedly coupled to the bracket1000. In this case, an inner region in the radial direction R of the carrier1100may be coupled to the bracket1000by bolting.

The description of the present disclosure will be made with reference to the above-mentioned contents. According to the present disclosure, the resolver600is disposed adjacent to the hub bearing500. Therefore, the size of the resolver600may be reduced, and thus the size of the wheel structure10may be reduced in comparison with a case in which the resolver600is disposed adjacent to the motor including the rotary part200and the fixing part300.

Vehicle

A vehicle according to the present disclosure may include the wheel structure10, and a vehicle body (not illustrated) to which at least a partial region of the wheel structure10is fixedly coupled. In this case, the wheel structure10may include the wheel100, the rotary part200disposed inside the wheel100and configured to rotate together with the wheel100, the fixing part300disposed to face the rotary part200, the hub bearing500disposed at one side of the rotary part200and the fixing part300, and the resolver600disposed to face the hub bearing500and configured to detect the position of the hub bearing500.

In addition, the hub bearing500may include the hub body510fixedly coupled to the rotary part200, and the hub outer race520fixedly coupled to the fixing part300. In addition, the resolver600may include the resolver rotor610and the resolver stator620, and the resolver rotor610may be fixedly coupled to the hub body510.

In addition, the vehicle according to the present disclosure may further include a brake assembly1200disposed between the wheel100and the hub body510in the radial direction R of the wheel structure10.

Meanwhile, the above-mentioned description of the wheel structure10according to the present disclosure may also be equally applied to the wheel structure provided in the vehicle according to the present disclosure.

The present disclosure has been described with reference to the limited embodiments and the drawings, but the present disclosure is not limited thereto. The present disclosure may be carried out in various forms by those skilled in the art to which the present disclosure pertains within the technical spirit of the present disclosure and within the scope equivalent to the appended claims.