Vehicle floating disc hub assembly

1. A vehicle floating disc hub assembly comprising:

a hub portion comprising:

a bearing housing disposed on an inner circumferential surface of the hub portion and having a bearing mounted therein, wherein the bearing is configured to couple to an axle;

a flange portion disposed in one end in an axial direction; and

a plurality of disc fastening grooves disposed in another end; and

a disc portion configured to be mounted on the hub portion and comprising a hub fastener corresponding to and configured to be fastened to the plurality of disc fastening grooves through a fastening member,

wherein the fastening member comprises:

a spring clip mounted between the plurality of disc fastening grooves and the hub fastener to form a contact force with each of the plurality of disc fastening grooves;

a spring plate formed to have an elastic force in the axial direction of the axle and disposed in the spring clip; and

a fastening bolt configured to couple to the hub fastener through the spring plate,

wherein the plurality of disc fastening grooves are formed such that a direction of an outer peripheral surface of the hub portion is open, and

wherein the disc portion is formed to have a floating structure configured to be freely deformed in the axial direction and in a radial direction without forcibly constraining thermal deformation.

2. The vehicle floating disc hub assembly of claim 1 ,

wherein the hub portion has a shape in which an outer diameter thereof gradually expands from the plurality of disc fastening grooves to the flange portion, and a plurality of straight ribs are disposed along an outer circumferential surface between the plurality of disc fastening grooves and the flange portion.

3. The vehicle floating disc hub assembly of claim 1 ,

wherein the bearing housing is inserted into the inner circumferential surface of the hub portion and a serration portion is formed on the inner circumferential surface of the hub portion to prevent deviation of the inserted bearing housing.

4. The vehicle floating disc hub assembly of claim 1 ,

wherein the hub fastener comprises:

an insertion portion protruding along an inner circumferential surface of the disc portion and configured to be insertably mounted into the plurality of disc fastening grooves; and

a positioning surface for determining a position of the disc portion in the axial direction for the hub portion and for preventing deviation in one axial direction by forming an extended area larger than the each of the plurality of disc fastening grooves on both sides of an end portion thereof with respect to another side of a protruding end of the inserting portion in a fastening bolt inserting direction.

5. The vehicle floating disc hub assembly of claim 4 ,

wherein the each of the plurality of disc fastening grooves is provided with a disc through-hole having an area through which the positioning surface is configured to pass, and

wherein, when the disc portion is being mounted in the hub portion, the disc portion is placed on a circumference of the hub portion and the positioning surface passes through the disc through-hole, and thereafter, the disc portion rotates and the hub fastener faces the plurality of disc fastening grooves in a same axis at a corresponding position, and after the disc portion is pulled and the hub fastener is inserted into the plurality of disc fastening grooves, the disc portion is mounted by being fastened through the fastening member.

6. The vehicle floating disc hub assembly of claim 1 ,

wherein, in the spring clip, a “u”-shaped clip cutting portion is formed in a clip body to provide the elastic force in a vertical direction.

7. The vehicle floating disc hub assembly of claim 1 ,

wherein the spring plate comprises a cutting portion formed in some directions from a bolt through-hole through which an end portion of the fastening bolt passes.

8. The vehicle floating disc hub assembly of claim 1 ,

wherein, in the disc portion, an inner side portion of a circumferential surface forms a step difference of a deeper depth in a direction opposite to the radial direction than an outer side portion of the circumferential surface.