Patent ID: 9199350
Filing Date: 2015-12-01
Classification: B23Q,F16H,Y10T

Abstract:
1. A macro-micro actuated distended guide rail precision rotation apparatus, comprising: a base, a torque motor having a stationary portion affixed to the base and a rotary output, a bearing housing affixed to the base surrounding the torque motor and having a bearing axis in substantially co-axial alignment with a motor rotary output, a bearing having a fixed and a rotatable ring with the fixed ring connected to the bearing housing, a bearing outer ring cap fixedly arranged on an upper surface of the fixed ring of the bearing, a bearing inner ring cap fixedly arranged on a lower surface of the rotatable ring of the bearing, an intermediate rotating body connected to the bearing inner ring cap, a round grating provided at an outer edge of the bearing inner ring cap, a connecting piece connected to the rotary output of the torque motor, a fine movement mechanism having a fixed body portion attached to the connecting piece, a rotating body portion attached to the intermediate rotating body and a moving body portion connected to the fixed body portion and the rotating body portion by flexible hinges that enable the rotating body portion to move a limited amount in a direction radial to the bearing axis, a piezoelectric actuator cooperating with the fine movement mechanism to make micro-adjustments to the relative position of the rotating body portion to the fixed body portion, a gasket fixed between the moving body portion of the fine movement mechanism and the piezoelectric actuator, and a rotary worktable affixed to the rotation body of the fine movement mechanism, wherein: the stationary portion of the torque motor and the bearing housing are both fixedly arranged on an upper surface of the base, the bearing outer ring cap is retained on an annular inner edge step at an end of the bearing housing, with the bearing inner ring cap connected at an annular outer edge step to the intermediate rotating body; the connecting piece is fixedly connected to the rotary output of the torque motor, the connecting piece and the intermediate rotating body are both connected to a lower end of the fine movement mechanism, and an upper end face of the fine movement mechanism is fixedly connected to the rotary worktable.