Patent ID: 8678159

Claim:
A centrifugal clutch device comprising: an active rotary part ( 101 ) configured to be rotated by a power source; a passive rotary part ( 201 ) configured to output rotational energy having an inner annular clutch interface ( 120 ), said inner annular clutch interface ( 120 ) configured to engage and release with a centrifugal force actuation clutch interface ( 119 ); at least one C-shaped joint structure assembly ( 100 ) configured to be bent by displacement forces, said C-shaped joint structure assembly ( 100 ) comprising a radial arrangement installed between the active rotary part ( 101 ) and the passive rotary part ( 201 ) of the centrifugal clutch device, wherein said C-shaped joint structure assembly ( 100 ) is configured to be driven by the active rotary part, said C-shaped joint structure assembly ( 100 ) comprising a joint axial core ( 113 ) of the C-shaped joint structure configured to connect a first end of an active arm ( 111 ) of the C-shaped joint structure and a first end of a centrifugal compelling arm ( 112 ) of the C-shaped joint structure, and a recovery spring ( 114 ) installed between the active arm and the centrifugal compelling arm adjacent the joint axial core ( 113 ) near the first end of the centrifugal compelling arm ( 112 ) and first end of the active arm ( 111 ) so that an inward-bending pre-stressed force is created between the active arm and the centrifugal compelling arm, wherein a second end of the active arm ( 111 ) of the C-shaped joint structure is connected and fastened on the active rotary part ( 101 ), and a distal second end of the centrifugal compelling arm ( 112 ) of the C-shaped joint structure is coupled with the centrifugal force actuation clutch interface ( 119 ), and wherein said C-shaped joint structure is configured so that when a rotation speed of the active rotary part ( 101 ) reaches a preset engagement rotation speed, the centrifugal force actuation clutch interface ( 119 ) is outwardly expanded and moved so as to be engaged with the inner annular clutch interface ( 120 ) of the passive rotary part ( 201 ) so that the passive rotary part ( 201 ) outputs the rotational energy.