Patent ID: 7322581

Claim:
A multi-functional caterpillar type bicycle, comprising: a bicycle frame, a saddle, a steering handle, and a sprocket pedal power mechanism; further comprising: a caterpillar type driving structure (A), comprising a driving wheel ( 1 ) drivingly connected to the sprocket pedal power mechanism, at least one auxiliary wheel ( 2 ) pivotally supported on a tail of the bicycle frame, a caterpillar ( 3 ) provided on the driving wheel ( 1 ) and the auxiliary wheel ( 2 ), and a connecting rod ( 4 ) for determining the positional relation between the driving wheel ( 1 ) and the auxiliary wheel ( 2 ); a multi-functional switchable front guide mechanism (B), comprising switch means fastened to a distal end of a front rod of the bicycle frame, a front guide rolling wheel ( 5 ) rotatably connected to a pivotal shaft ( 7 ) provided by the switch means, and a front guide sliding board ( 6 ) fixedly connected to two hinge support points ( 8 , 9 ) provided by the switch means; characterized in that the switch means in the multi-functional switchable front guide mechanism (B) provides a first switch state and a second switch state; in the first switch state, the pivotal shaft ( 7 ) is at a first level higher than the two hinge support points ( 8 , 9 ) so that the front guide rolling wheel ( 5 ) is off the ground and the front guide sliding board ( 6 ) touches the ground in a flat manner; in the second switch state, both of the two hinge support points ( 8 , 9 ) are at a second level higher than the pivotal shaft ( 7 ) such that the front guide rolling wheel ( 5 ) touches the ground and the front guide sliding board ( 6 ) is off the ground.