Patent ID: 7771299

Claim:
A V-belt continuously variable transmission comprising: a primary sheave disposed on a primary sheave shaft, to one side of which a driving force of an engine is input, and having a movable sheave half and a fixed sheave half arranged to define a V-groove for receiving a belt; a secondary sheave disposed on a secondary sheave shaft, from which a driving force for a driving wheel is output, and having a movable sheave half and a fixed sheave half arranged to define a V-groove for receiving a belt; a V-belt received in the respective V-grooves of the primary sheave and the secondary sheave to transmit a rotational driving force between the primary and secondary sheaves; an electric motor; a control device arranged to control the electric motor; and a sheave drive mechanism arranged to transmit a driving force of the electric motor to the movable sheave half of the primary sheave to control respective groove widths of the primary sheave and the secondary sheave; and a detection part arranged on the other side of the primary sheave shaft with respect to the primary sheave such that the primary sheave is arranged between the one side of the primary sheave shaft which receives the driving force of the engine and the other side of primary sheave shaft which includes the detection part, the detection part arranged to be detected by a rotational speed sensor so as to detect a rotational speed of the primary sheave shaft.