| 摘要 |
<p>A torque detection device for detection of torque generated by a power handtool, such as a battery-operated screwdriver, comprises a sensor unit 12 arranged to detect a deformation variable dependent on a deformation induced by the torque. The sensor unit may comprise a strain bar 64, which is subjected to deformation by output torque of a transmission of the handtool, and two strain gauges 16 arranged to detect the deformation. Torque detection is thus achievable without reference to, in particular, the operating current of a motor of the handtool. A transmission element 28 may be provided, such as an internal gearwheel 32, which is operatively connected with a transfer element 30 for transmission of the deformation variable. The transfer element may be of a substantially annular construction, and may have a radial projection 78 for transferring at least one force to the strain bar.</p> |
