Bolt tensioning tool

A bolt tensioning tool comprising:

• a housing;
• an electric motor positioned within the housing;
• a tensioning assembly having an inner socket and an outer socket, the inner socket connectable to a bolt, the outer socket connectable to a nut, wherein the outer socket is configured to rotate the nut relative to the bolt to apply tension to the bolt during a tensioning operation;
• a bolt tension monitoring system positioned within the housing, the bolt tension monitoring system including an ultrasonic transducer and an ultrasonic sensor;
• and
• a planetary gear system configured to transfer torque from the electric motor to the outer socket, the planetary gear system including a plurality of stages, each stage including a carrier gear and a plurality of gears supported by the carrier gear,
• wherein the bolt tension monitoring system is configured to monitor the tension of the bolt during the tensioning operation,
• wherein the outer socket defines the carrier gear of a last planetary gear stage of the plurality of stages.

A bolt tensioning tool comprising:

• a housing;
• an electric motor positioned within the housing;
• a tensioning assembly having an inner socket and an outer socket, the inner socket connectable to a bolt, the outer socket connectable to a nut, wherein the outer socket is configured to rotate the nut relative to the bolt to apply tension to the bolt during a tensioning operation;
• a planetary gear system configured to transfer torque from the electric motor to the outer socket, the planetary gear system including a plurality of stages, each stage including a carrier gear and a plurality of gears supported by the carrier gear;
• a bolt tension monitoring system configured to monitor the tension of the bolt during the tensioning operation, the bolt tension monitoring system including a controller and a sensor;
• and
• a biasing member configured to bias the sensor toward an end of the bolt when the bolt is inserted in the inner socket,
• wherein the controller is configured to determine the tension of the bolt based on a signal from the sensor corresponding with a dimension of the bolt,
• wherein the outer socket defines the carrier gear of a last planetary gear stage of the plurality of stages.