Multi-headed power tool and systems for fastening heads thereon

A power tool comprising:

• a housing;
• a motor and transmission assembly received in the housing;
• a trigger for activating the motor and transmission assembly;
• an output shaft driven by the motor and transmission assembly for rotation about an axis;
• a head interface coupled to the output shaft, the head interface;
• a tool head element configured for selective engagement on the head interface, the tool head element comprising:
• a housing including an input shaft configured to removably couple with the output shaft;
• and
• a collar comprising at least one lock;
• wherein, upon attachment of the tool head element to the head interface, the at least one lock is locked onto the head interface and held to engage the tool head element onto the head interface and establish a drive connection between the output shaft and input shaft such that, when the motor and transmission assembly of the power tool is operated, the input shaft is configured to rotate with the output shaft about the axis and thus drive the tool head element,
• wherein the at least one lock is a plurality of locks comprising pins or rolling elements.

A power tool comprising:

• a housing;
• a motor and transmission assembly received in the housing;
• a trigger for activating the motor and transmission assembly;
• an output shaft driven by the motor and transmission assembly for rotation about an axis;
• a head interface coupled to the output shaft, the head interface;
• a tool head element configured for selective engagement on the head interface, the tool head element comprising:
• a housing including an input shaft configured to removably couple with the output shaft;
• and
• a collar comprising at least one lock;
• wherein, upon attachment of the tool head element to the head interface, the at least one lock is locked onto the head interface and held to engage the tool head element onto the head interface and establish a drive connection between the output shaft and input shaft such that, when the motor and transmission assembly of the power tool is operated, the input shaft is configured to rotate with the output shaft about the axis and thus drive the tool head element,
• wherein the tool head element further comprises a housing with a backing plate or cover and the at least one lock is positioned between the collar and the backing plate, the at least one lock configured to move within a housing of the tool head element.

A power tool comprising:

• a housing;
• a motor and transmission assembly received in the housing;
• a trigger for activating the motor and transmission assembly;
• an output shaft driven by the motor and transmission assembly for rotation about an axis;
• a head interface coupled to the output shaft, the head interface;
• a tool head element configured for selective engagement on the head interface, the tool head element comprising:
• a housing including an input shaft configured to removably couple with the output shaft;
• and
• a collar comprising at least one lock;
• wherein, upon attachment of the tool head element to the head interface, the at least one lock is locked onto the head interface and held to engage the tool head element onto the head interface and establish a drive connection between the output shaft and input shaft such that, when the motor and transmission assembly of the power tool is operated, the input shaft is configured to rotate with the output shaft about the axis and thus drive the tool head element,
• wherein the collar is further configured for rotational movement about the axis, without removing the tool head element off of the head interface, to rotate a position of the tool head element via withdrawing teeth from receiving grooves and rotationally repositioning the teeth into the receiving grooves.