Hollow wheel assembly of luggage

1. A hollow wheel assembly, which is adapted to be mounted on a bottom of a case of a luggage, comprising:

a wheel mount, which is adapted to be connected to the case of the luggage, including a shaft sleeve with an assembling passage;

two wheel members connected to opposite ends of the shaft sleeve respectively for free rotation; and

a hollow shaft inserted into the assembling passage of the shaft sleeve, and having a vision passage passing through the hollow shaft in an axial direction;

wherein each of the wheel members includes an inner wheel member and an outer wheel member; the inner wheel member includes an inner ring portion, an outer ring portion, and a plurality of connecting portions; the inner ring portion and the outer ring portion are concentric, and the inner ring portion is within the outer ring portion; the connecting portions are between the inner ring portion and the outer ring portion with opposite ends connected to the inner ring portion and the outer ring portion, so that a plurality of vision bores are formed between the inner ring portion and the outer ring portion and between the neighboring connecting portions; the inner ring portion is provided with an assembling bore at a center thereof, and the shaft sleeve is inserted into the assembling bore; opposite ends of the hollow shaft are abutted against the inner ring portions respectively; the outer wheel members are mounted on the outer ring portions of the inner wheel members respectively, whereby one may see through the wheel members via the vision bores and the vision passages when the wheel members are rotating.

2. The hollow wheel assembly of claim 1 , wherein the hollow shaft has two stop flanges at opposite ends thereof, and outer diameters of the stop flanges are greater than an outer diameter of the shaft sleeve, and smaller than inner diameters of the inner ring portions of the wheel members.

3. The hollow wheel assembly of claim 2 , wherein each of the inner ring portions has a shoulder portion on a side thereof to be abutted against the corresponding stop flange of the hollow shaft to restrict the wheel members on the shaft sleeve.

4. The hollow wheel assembly of claim 1 , wherein the wheel mount includes a seat member and an assembling member; the seat member and the assembling member are detachably connected together; the shaft sleeve is connected to the assembling member, and the seat member is adapted to be connected to the case of the luggage.

5. The hollow wheel assembly of claim 4 , wherein the seat member includes a first positioning bore, and the assembling member has a second positioning bore; the wheel mount further has a connecting member to be inserted into the first and the second positioning bores for connecting the seat member to the assembling member.

6. The hollow wheel assembly of claim 1 , wherein the inner ring portions of the inner wheel members, the outer wheel member, and the hollow shaft have different colors.

7. A hollow wheel assembly, which is adapted to be mounted on a bottom of a case of a luggage, comprising:

a wheel mount, which is adapted to be connected to the case of the luggage, including a shaft sleeve with an assembling passage; and

two wheel members connected to opposite ends of the shaft sleeve respectively for free rotation; and

a hollow shaft inserted into the assembling passage of the shaft sleeve, and having a vision passage passing through the hollow shaft in an axial direction thereof;

wherein opposite ends of the hollow shaft are abutted against the wheel members respectively, so that one may see through the wheel members via the vision passages when the wheel members are rotating;

wherein each of the wheel members includes an inner wheel member and an outer wheel member; the inner wheel member includes an inner rind portion and an outer ring portion; the inner ring portion and the outer ring portion are concentric, and the inner ring portion is within the outer ring portion; each of the inner ring portion is provided with an assembling bore at a center thereof and a shoulder portion on a side thereof; the shaft sleeve is inserted into the assembling bore, and the stop flanges of the hollow shaft are abutted against the corresponding shoulder portions to restrict the wheel members on the shaft sleeve; the outer wheel members are mounted on the outer ring portions of the inner wheel members respectively, whereby one may see through the wheel members via the vision passages when the wheel members are rotating.

8. The hollow wheel assembly of claim 7 , wherein the wheel mount of the wheel assembly includes a seat member and an assembling member; the seat member and the assembling member are detachably connected together; the shaft sleeve is connected to the assembling member, and the seat member is adapted to be connected to the case of the luggage.

9. The hollow wheel assembly of claim 8 , wherein the seat member includes a first positioning bore, and the assembling member has a second positioning bore; the wheel mount further has a connecting member to be inserted into the first and the second positioning bores for connecting the seat member to the assembling member.