| 摘要 |
A human powered skibob is described. A skibob is a vehicle with runners for gliding downhill over snow. With the present invention, a locomotive force is provided by a pedal powered drive assembly which includes at least one rigid suspension member depending vertically from a back of the frame. A sliding beamus slidably mounted to the at least one suspension member for sliding movement relative to the frame. Biasing springs are disposed between the sliding beam and the at least one suspension members, thereby urging the sliding beam toward a remote end of the at least one suspension member. A secondary drive sprocket is rotatably mounted to the sliding beam. The secondary drive sprocket has at least one drive member with at least two radially extending force transmitting members angularly offset and terminating in pivotally mounted gripping members. The length of the force transmitting members are such that the biasing springs are compressed when the force transmitting member is vertically extended with the gripping member engaging a snow covered groundsurface. A continuous drive linkage extends between the primary drive sprocket and the secondary drive sprocket. A force exerted via the pedals to rotate the primary drive sprocket is transmitted by the continuous drive linkage to rotate the secondary drive sprocket. Each of the gripping members on the force transmitting members alternately engages a snow covered groundsurface with a bouncing rolling gait that is accommodated by the biasing springs and the pivotal mounting of the gripping members.
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