Material working attachments

A coupling assembly for attaching a working implement to a vehicle, the working implement for engaging and working material on a ground surface during operation of the vehicle in a working direction along the ground surface, the coupling assembly comprising:

• a) a frame having a mount for detachably mounting the coupling assembly to the vehicle;
• b) a pair of arms projecting from the frame away from the vehicle and spaced apart from each other in a lateral direction perpendicular to the working direction, the pair of arms alignable parallel with a coupling axis along which a pair of coupling channels attached to the working implement extend for sliding the pair of arms into respective coupling channels to releasably interconnect the arms with the channels;
• and
• c) a locking mechanism for axially locking the arms and the channels relative to each other when interconnected, the locking mechanism including a locking member moveably coupled to the frame, and when the arms and channels are interconnected, the locking member is movable relative to an abutment structure fixed relative to the channels, between a locked position for interlocking engagement with the abutment structure to axially lock the arms and channels relative to each other, and an unlocked position clear of the abutment structure.