| 摘要 |
An electronic torque wrench includes a handle unit, a turning unit, a sensor unit, an operating unit, and a processor unit electrically connected to the sensor unit and the operating unit. The turning unit includes a wrench head member, first and second positioners, and a sleeve. The wrench head member has a head portion, a strain-measurement portion, and a shaft portion extending from the strain-measurement portion and rotatably received in the sleeve. The first and second positioners are connected to opposite ends of the shaft portion and exposed from the sleeve. The first positioner retains the wrench head member at a predetermined angular position relative to the sleeve and the handle unit. |
| 主权项 |
1. An electronic torque wrench comprising:
a handle unit formed with multiple pressing holes that are spaced apart annularly from one another around a longitudinal axis (L) of the handle unit; a turning unit including a wrench head member, a first positioner, a second positioner and a sleeve, said wrench head member having a head portion, a strain-measurement portion that is connected to said head portion, and a shaft portion that extends from said strain-measurement portion along the longitudinal axis (L) oppositely of said head portion, and that is rotatably received in said sleeve to be in sliding contact therewith, said first and second positioners being connected to opposite ends of said shaft portion of said wrench head member and being exposed from said sleeve, said sleeve being disposed between said shaft portion and said handle unit, and between said first and second positioners such that said shaft portion is prevented from moving longitudinally, said first positioner having an annular flange that projects radially from said shaft portion, a button hole that is radially formed in said annular flange and that is adjustable to register with a selected one of said pressing holes through a relative rotation of said shaft portion and said sleeve, a press button that is slidably disposed in said button hole and that is extendable into the selected one of said pressing holes, and a resilient element that is disposed in said button hole to bias said press button to move into the selected one of said pressing holes, said first positioner retaining said wrench head member at a predetermined angular position relative to said sleeve and said handle unit when said press button extends into the selected one of said pressing holes; a sensor unit disposed in said strain-measurement portion for measuring a deformation value of said wrench head member; a processor unit electrically connected to said sensor unit for processing the deformation value into a torque value; and an operating unit including a display element that is disposed on said handle unit and that is electrically connected to said processor unit for displaying the torque value. |
