Patent ID: 8733524
Filing Date: 2014-05-27
Classification: B60B,F16D

Abstract:
1. A bicycle hub driving system comprising: a hub adapted located at a center of a wheel and being a hollow hub; a socket unit being a hollow socket and a ratchet unit and a flywheel unit respectively mounted to the socket unit, the ratchet unit located in an inner end of the hub, the flywheel unit adapted to be connected with a sprocket unit; an axle unit located between the hub and the socket unit, the axle unit having an axle extending therethrough, at least one rotary member located between the axle and an inner periphery of the hub, and between the axle and the socket unit; a clutch driving device located between the ratchet unit and the inner periphery of the hub, the clutch driving device having a clutch unit, a driving unit and at least one driving member located between the clutch unit and the driving unit, the clutch unit comprising a first ratchet portion and a second ratchet portion, the first ratchet portion located on the ratchet unit and the second ratchet portion connected to the at least one driving member, the driving unit comprising first driving teeth and second driving teeth, the first driving teeth defined in the inner end of the hub and the second driving teeth defined in the at least one driving member, the first driving teeth engaged with the second driving teeth, the at least one driving member movable linearly and radially between the first ratchet portion and the first driving teeth to engage the first ratchet portion with second ratchet portion, or to disengage the first ratchet portion from the second ratchet portion, and to co-rotate the hub with the socket unit, or to separate the hub from the socket unit, the socket unit driving the hub by engagement between the first ratchet portion with second ratchet portion of the socket unit indirectly rotating engagement between the first driving teeth with second driving teeth, and a return member mounted to the at least one driving member and the first ratchet portion to move the at least one driving member linearly toward the first ratchet portion.