Tool assembly and attachment apparatus for tool head

A tool assembly, the tool assembly defining a mutually orthogonal reference longitudinal direction, transverse direction, and lateral direction and a first end and a second end separated along the longitudinal direction, the tool assembly comprising:

• a power unit configured to output energy through an output shaft;
• a latch comprising a notch configured to extend into a groove at a portion of a tool head, the latch comprising an arm positioned along the longitudinal direction between a latch end and the notch, the latch end positioned along the longitudinal direction more proximate than the notch to the second end;
• a coupler extending along the longitudinal direction and connected to the output shaft of the power unit, the coupler having a cavity extending along the longitudinal direction, wherein a tool end opening is formed at the first end through which the portion of the tool head may extend into the cavity along the longitudinal direction, the coupler having a latch opening extending along the longitudinal direction and into the cavity, wherein the latch is positioned in the cavity through the latch opening, the arm of the latch extending along the longitudinal direction within the cavity;
• and
• a collar extending at least partially around the coupler, wherein the collar is articulatable along the longitudinal direction about the latch opening.