Analysis and Research on the Influencing Factors of Battery Wrench Output Torque

In order to study the influencing factors of battery wrench output torque, a dynamic model is established based on the wrench’s structure. Through calculation, the output speed and battery power are determined as the influencing factors on the output torque, and the angular acceleration (i.e. inertia) has an important influence on the final tightening torque value. With the two factor experiment and two-way analysis of variance method, the output speed is confirmed as the significant influencing factor of the output torque. At the same time, the effect of output speed on output torque is further explored, and the experimental data and theoretical calculation all show that the output speed and the output torque have a clearly positive correlation, which validates the established dynamic model. Within the middle range of the applicable speed, the wrench’s output torque is relatively stable, which has a guiding significance for the selection of parameters and the assembly quality assurance in the practical application. And it has enlightening significance for such as EC tools to optimize the final output torque through the control of the angular acceleration.