Nutrunner with clutch mechanism

A nutrunner comprising:

• a housing;
• a motor disposed within the housing and including an output shaft rotatable about an axis;
• a head extending from the housing, the head including an output drive;
• a transmission configured to transfer rotation from the output shaft to the output drive, the transmission including a ring gear that is rotatable about the axis with respect to the housing;
• and
• a clutch mechanism engaged with the ring gear;
• wherein the clutch mechanism is configured to prevent the ring gear from rotating relative to the housing when a torque applied to the ring gear is less than a torque threshold, wherein the clutch mechanism is configured to permit the ring gear to rotate relative to the housing when a torque applied to the ring gear is greater than or equal to the torque threshold, and
• wherein the torque threshold is adjustable by hand without use of a tool
• wherein the clutch mechanism includes an adjustment collar configured to be rotated to adjust the torque threshold
• wherein the adjustment collar includes an inner collar including a protrusion and an outer collar including a recess that receives the protrusion to couple the inner collar for co-rotation with the outer collar.

A nutrunner comprising:

• a housing;
• a motor disposed within the housing and including an output shaft;
• a head extending from the housing, the head including a rotatable output drive;
• a spindle disposed within the housing and extending between the output shaft of the motor and the head;
• and
• a transmission configured to transfer rotation from the output shaft to the output drive, the transmission including:
• a first transmission portion configured to transfer rotation from the output shaft to the spindle, the first transmission portion including a first planetary stage and a ring gear,
• a second transmission portion configured to transfer rotation from the spindle to the output drive, the second transmission portion including a second planetary stage, and
• a clutch mechanism disposed between the first transmission portion and the second transmission portion,
• wherein the clutch mechanism is configured to prevent the transfer of rotation from output shaft to the output drive when a torque applied to the ring gear is greater than or equal to a torque threshold.