Importance

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Abstract

A rotatable torque adjusting device which is incorporated in a rotation tool for adjusting output torque of the rotation tool is disclosed. The rotation tool has a front end surface on which a support cylinder is provided to rotatably support an output shaft which provides the output torque. Cavities are provided on the front end surface and surround the support cylinder to each receive a spherical member which applies a force to a rotating disk inside the rotation tool to adjust the output torque. The torque adjusting device includes a cam ring rotatably fit over the support cylinder, having a plurality of circumferentially-extending arc-shaped camming projections, each defining a cam. A follower ring non-rotatably fit over the support cylinder, having camming projections, each defining a follower engageable with the respective cam of the cam ring which converts a relative rotation therebetween into an axial movement of the cam ring. A biasing device is arranged between the cam ring and the spherical members for applying a force to the spherical member caused by the axial movement of the cam ring. A cap is fit over the cam ring, the follower ring and the biasing means in such a way to rotatably couple to the cam ring and axially movably fix the follower ring so that by manually rotating the cap, a relative rotation is caused between the cam ring and the follower ring which in turn axially moves the cam ring to apply the force to the spherical members.

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First Claim