US 9,873,178 B2Granted

Rotary gear transmission for tools

AssigneeArbortech Industries Limited

InventorKevin Inkster

Life of this patent

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Abstract

A cutting tool mechanism 11 for 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.

Claims21

Dependent claims

A cutting abrading or grinding tool mechanism for converting a rotary motion to an orbital, oscillatory or impact motion, said mechanism having:

an inner circular part having teeth members extending radially outwardly;
and
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 inner teeth members;
where, as a one of said inner circular part and said surrounding circular part rotates about a central axis of an input coupling of the mechanism, 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, wherein the engaging teeth members ride along and over each other to provide an orbital, oscillatory or impact motion in the other of said inner circular part and said surrounding circular part;
and
where the input coupling is configured for transmission of rotary motion to the one of said inner circular part and said surrounding circular part, and the other of said inner circular part or said surrounding circular part has an output coupling configured to receive a blade, the output coupling configured to transmit said orbital, oscillatory or impact motion to said blade, and said output coupling configured to oscillate between a maxima away from and a minima toward the central axis of the input coupling.

5 more elements

A cutting abrading or grinding tool mechanism for converting a rotary motion to an orbital, oscillatory or impact motion, said mechanism having:

an inner circular part having teeth members extending radially outwardly;
a surrounding circular part having inner teeth members extending radially inwardly, and outer teeth members extending radially outwardly;
and
an outer circular part having inner teeth member extending radially inwardly;
where said inner circular part is configured to co-operate with said surrounding circular part by engagement of said inner circular part teeth members with said surrounding circular part teeth members;
where said surrounding circular part is configured to co-operate with said outer circular part by engagement of said surrounding circular part teeth members with said outer circular part teeth members;
where said inner circular part has fewer teeth members than the number of inner teeth members of said surrounding circular part, and said surrounding circular part has fewer outer teeth members than the number of inner teeth members of said outer circular part;
where, as one of said inner circular part and said outer circular part rotates, surrounding circular part is configured to move constrained by the engagement of said teeth members of said inner circular part, said outer circular part, and said surrounding circular part, wherein the engaging teeth members ride along and over each other to provide an orbital, oscillatory or impact motion in said surrounding circular part;
and
where said mechanism has an input coupling configured for transmission of rotary motion to one of said inner circular part and said outer circular part, and said surrounding circular part has an output coupling configured to receive a blade, the output coupling configured to transmit said orbital, oscillatory or impact motion to said blade, and said output coupling configured to oscillate between a maxima away from and a minima toward a central axis of the input coupling.

7 more elements

A cutting abrading or grinding tool comprising a mechanism for converting a rotary motion to an orbital, oscillatory or impact motion, said mechanism having:

an inner circular part having teeth members extending radially outwardly;
a surrounding circular part having inner teeth members extending radially inwardly, and outer teeth members extending radially outwardly;
and
an outer circular part having inner teeth member extending radially inwardly;
where said inner circular part is configured to co-operate with said surrounding circular part by engagement of said inner circular part teeth members with said surrounding circular part teeth members;
where said surrounding circular part is configured to co-operate with said outer circular part by engagement of said surrounding circular part teeth members with said outer circular part teeth members;
where said inner circular part has fewer teeth members than the number of inner teeth members of said surrounding circular part, and said surrounding circular part has fewer outer teeth members than the number of inner teeth members of said outer circular part;
and
where, as one of said inner circular part and said outer circular part rotates, said surrounding circular part is configured to move constrained by the engagement of said teeth members of said inner circular part, said outer circular part, and said surrounding circular part, wherein the engaging teeth members ride along and over each other to provide an orbital, oscillatory or impact motion in said surrounding circular part;
the cutting abrading or grinding tool further comprising a motor for supplying rotary motion to at least one of said inner circular part and said outer circular part, said surrounding circular part having an output coupling configured to receive a blade, the output coupling configured to transmit said orbital, oscillatory or impact motion to said blade, and said output coupling configured to oscillate between a maxima away from and a minima toward a central axis of the input coupling to move teeth of said blade through orbital/oscillatory traces according to relative speeds of rotation of said inner circular part and said outer circular part.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/028,087Filed 9 Oct 2014
Priority: AU 201390390710 Oct 2013
Published: US 2016/0236317 A118 Aug 2016
Granted: 23 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

B24B 23/03
With rotating grinding tools; Accessories therefor: the tool being driven in a combined movement
B23D 47/12
Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts: of drives…
B24B 23/04
Portable grinding machines, e.g. hand-guided; Accessories therefor: with oscillating grinding tools; Accessories therefor
B24B 27/06
Other grinding machines or devices: grinders for cutting-off