| 摘要 |
<p>A screw tightening power tool, comprising a rotation motor, a power supply means (27) connected to the motor, an output shaft (13), a torque responsive release clutch (14) including a driving half (16) and a driven half (17) and coupling the motor to the output shaft (13), an activating rod (26) coupled to the power supply means (27), a latch means (24) associated with one of the clutch halves (16) and cooperating with the activating rod (26), and a cam means (30) associated with the other of the clutch halves (17) and operatively connected to the latch means (24) for making the latter shift from an activating rod (26) supporting position to an activating rod (26) releasing position as the transferred torque has reached the actual preset release torque level of the clutch. The cam means (30) comprises a spindle (30) which is rotatively supported relative to the driven clutch half (17) for a limited rotational movement relative thereto.</p> |
