Virtual reality bicycle-training simulation platform

1. A virtual reality bicycle-training simulation platform that links the front wheel and rear wheel of a bicycle to a multimedia system, comprising:

a steering unit that supports the front wheel of said bicycle, said steering unit comprising a rotary table, a wheel rim seat mounted on said rotary table for carrying the front wheel of said bicycle, two adjustment blocks respectively mounted on two distal ends of said wheel rim seat and movable relative to each other and lockable to said wheel rim seat for holding down the front wheel of said bicycle on said wheel rim seat, said adjustment blocks each having a top wheel rim bearing surface, and a steering sensor adapted to detect direction and amount of rotation of said rotary table upon biasing of the front wheel of said bicycle by a user and to output a signal to said multimedia system indicative of the direction and amount of rotation of said rotary table; and

a rear wheel rack that supports the rear wheel of said bicycle, said rear wheel rack comprising a base frame, two rear wheel supports pivotally supported on said base frame and arranged in parallel, two coupling blocks respectively slidably coupled to said base frame at two opposite lateral sides, two struts coupled between said coupling blocks and said rear wheel supports, two locating members respectively and horizontally adjustably mounted on said rear wheel supports remote from said base frame and respectively coupled to the two distal ends of the wheel axle of the rear wheel of said bicycle to support the rear wheel of said bicycle on said rear wheel supports, and a damper controllable by said multimedia system to impart a damping resistance to the rear wheel of said bicycle.

2. The virtual reality bicycle-training simulation platform as claimed in claim 1 , wherein said wheel rim seat comprises a bottom plate and two side plates provided at two opposite lateral sides of said bottom plate.

3. The virtual reality bicycle-training simulation platform as claimed in claim 2 , wherein said steering unit further comprises an adjustable connection structure adapted to adjustably lock said adjustment blocks to said two side plates of said wheel rim seat.

4. The virtual reality bicycle-training simulation platform as claimed in claim 3 , wherein said adjustable connection structure comprises two symmetrical pairs of elongated slots respectively formed in said two side plates of said wheel rim seat near the two distal ends, and a plurality of fastening members respectively inserted through said elongated slots and fastened to said adjustment blocks for affixing said adjustment blocks to said side plates of said wheel rim seat.

5. The virtual reality bicycle-training simulation platform as claimed in claim 1 , wherein said adjustment blocks each have a front locating notch for engaging the wheel rim of the front wheel of said bicycle.

6. The virtual reality bicycle-training simulation platform as claimed in claim 1 , wherein said steering unit further comprises a base, which supports said rotary table for allow rotation of said rotary table on said base.

7. The virtual reality bicycle-training simulation platform as claimed in claim 6 , wherein said steering unit further comprises a flat ball bearing holder plate supported between said base and said rotary table, said flat ball bearing holder plate holding a plurality of steel balls that are rotatably supported between said base and said rotary table.

8. The virtual reality bicycle-training simulation platform as claimed in claim 6 , wherein said steering unit further comprises a turning angle control adapted to limit the rotation of said rotary table on said base to a predetermined angle.

9. The virtual reality bicycle-training simulation platform as claimed in claim 8 , wherein said turning angle control comprises a plurality of movable bolts respectively mounted on said rotary table and movable with said rotary table relative to said base, and a plurality of fixed bolts respectively mounted on said base and adapted to stop said movable bolts.

10. The virtual reality bicycle-training simulation platform as claimed in claim 6 , wherein said base comprises a plurality of shock absorbing and anti-slip foot members fixedly provided at a bottom side thereof.

11. The virtual reality bicycle-training simulation platform as claimed in claim 1 , wherein said damper of said rear wheel rack comprises a roller controllable by said multimedia system to impart a damping resistance to said rear wheel of said bicycle.

12. The virtual reality bicycle-training simulation platform as claimed in claim 11 , wherein said damper further comprises two locating frames that are respectively fastened to said base frame and arranged in parallel, and two wheel holder plates respectively and vertically adjustably fastened to said locating frames for supporting said roller.

13. The virtual reality bicycle-training simulation platform as claimed in claim 12 , wherein said locating frames of said damper each have a front end curved forwardly upwards.

14. The virtual reality bicycle-training simulation platform as claimed in claim 1 , wherein said struts of said rear wheel rack are straight rod members.

15. The virtual reality bicycle-training simulation platform as claimed in claim 1 , wherein said struts of said rear wheel rack are respectively formed of a shock absorber.

16. The virtual reality bicycle-training simulation platform as claimed in claim 1 , wherein said rear wheel rack further comprises two wheel axle bearings respectively fixedly fastened to said locating members and facing each other for supporting the wheel axle of the rear wheel of said bicycle.

17. The virtual reality bicycle-training simulation platform as claimed in claim 1 , wherein said rear wheel rack further comprises a first axle holder and a second axle holder respectively mounted on said rear wheel supports at a top side in a transverse direction to hold said locating members on said rear wheel supports respectively.

18. The virtual reality bicycle-training simulation platform as claimed in claim 17 , wherein said first axle holder is formed of a tubular nut; said second axle holder is formed of a barrel; said locating members include a first locating member formed of a screw bolt and threaded into said tubular nut of said first axle holder; and a second locating member supported in said barrel of said second axle holder.

19. The virtual reality bicycle-training simulation platform as claimed in claim 18 , wherein said barrel of said second axle holder has an elongated slot; said second locating member is axially movably supported in said barrel of said second axle holder and locked thereto with a lock screw.