ROTARY GEAR TRANSMISSION FOR TOOLS

摘要

A cutting tool mechanism 11 far providing a cutting, abrading or grinding action is disclosed. The mechanism 11 has an inner circular part 17 having teeth 19 extending radially outwardly, a surrounding circular part 25 having inner teeth 27 extending radially inwardly. The circular parts 17 and 25 co-operate by engagement their teeth 19 and 27. Rotation of one circular part causes the other to move constrained by the engagement of the teeth in an orbital, oscillatory or impact motion. An input coupling 81 is provided for transmission of rotary motion, and an output coupling 37 is provided to transmit said orbital, oscillatory or impact motion to a blade 13. In further embodiments, the surrounding circular part 25 can be provided with outwardly extending teeth and surrounded by a further outer circular part with inwardly extending teeth, to cooperate with the outwardly extending teeth, to provide more complex orbital, oscillatory or impact motion.

主权项

1. A cutting abrading or grinding tool mechanism for converting a rotary motion to an orbital, oscillatory or impact motion for use in a cutting, abrading or grinding tool, said mechanism having:
an inner circular part having teeth members extending radially outwardly; a surrounding circular part having inner teeth members extending radially inwardly; where said inner circular part has fewer teeth members than the number of inner teeth members of said surrounding circular part; where said inner circular part co-operates with said surrounding circular part by engagement of said inner circular part teeth members with said surrounding circular part teeth members; where, as a one of said inner circular part and said surrounding circular part rotates, an other of said inner circular part and said surrounding circular part is configured to move constrained by the engagement of said teeth members of said inner circular part and said surrounding circular part to provide an orbital, oscillatory or impact motion in the other of said inner circular part and said surrounding circular part; and where said mechanism has an input coupling configured for transmission of rotary motion thereto, and said inner circular part or said surrounding circular part has an output coupling to which a blade is fastened in a completed tool, the output coupling configured to transmit said orbital, oscillatory or impact motion and said blade is attached to said output coupling to oscillate between a maxima away from and a minima toward a central axis of the input coupling.