Patent ID: 8096211

Claim:
A digital torque wrench with indirect power transmission coupling, comprising: an eccentric driving module, for receiving power from a power source while transmitting said power, comprising a transmission gear shaft, for receiving power to rotate; a planet gear set, meshing with the transmission gear shaft for rotating; and an eccentric shaft rotated by the planet gear set; a sensing module, coupled to the eccentric driving module for receiving power from said eccentric driving module, comprising a conversion part, coupled to the eccentric shaft for enabling the eccentric shaft to be driven such that the conversion part is driven in a two-dimensional reciprocation by the rotating eccentric shaft, while simultaneously driving a transmission part to rotate about its gear axis; the transmission part, configured with a gear and an accommodation space such that the gear is meshed with a ratchet module; the accommodation space is used for receiving the conversion part and restricting movement therein; and a sensor, being mounted on the transmission part and electrically connected to the control module so as to permit deformation of the transmission part and correspondingly send an electric signal to a control module; the ratchet module driven to rotate, and coupled to the sensing module for receiving power from the sensing module; and the control module, electrically coupled to the sensing module for quantifying an electric signal from said sensing module.