The invention discloses a wedge
block type clutch which comprises a driving
cam, a
driven element, a plurality of centrifugal wedge blocks, at least one reset device and radial extending
stroke sets the same as the centrifugal wedge blocks in number. The
driven element is arranged on the driving
cam in a sleeving manner, the radial extending
stroke sets are symmetrically arranged on the driving
cam, the centrifugal wedge blocks are movably installed on the radial extending
stroke sets, and the reset device applies pushing force to the centrifugal wedge blocks to enable the centrifugal wedge blocks and the
driven element to keep the non-contact state all the time; and through tiny
centrifugal force, the centrifugal wedge blocks are in contact with the driven element, then the radial extending stroke sets push the centrifugal wedge blocks to apply the pushing force in the radial direction, and therefore large torque can be transmitted under the low rotating speed condition. The wedge
block type clutch is high in loading capacity and good in
impact resistance, and high performance of the single / double-direction
clutch can be achieved. The wedge
block type clutch can be used for
power transmission between a prime motor and a working
machine or between a driving element and the driven element in the
machine, the separation function and the field of
mechanical transmission such as automatic transmissions.