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US 5,669,453 AGranted
Power carving tool
AssigneeRyobi Ltd.
InventorShumi Akazawa
Life of this patent
Estimating the term…
Abstract
A power carving tool has a housing, a driving motor, a cam shaft engaged with the rotary shaft of the driving motor and having a cooling fan, a cam sleeve with a slanted cam surface, engaged with the cam shaft and reliably held by a ball bearing supported by the housing, and an output shaft moved reciprocatingly by bringing a contact portion provided at the rear portion thereof into contact with the cam surface thereby to maintain a stable rotation of the cam sleeve and to avoid mechanical loss.
Claims13
A power carving tool, which comprises:
- a) a housing in which a ball bearing is supported;
- b) a rotary driving device;
- c) a cam shaft which is engaged with a driving shaft of the rotary driving device so as to be rotated together with the driving shaft;
- d) a cam sleeve which is rotated with the cam shaft, which is inserted into an inner ring of the ball bearing as to be rotated together with the inner ring, and which has, at a front face thereof, a cam surface;
- and
- e) an output shaft which is disposed in such a manner that an axis of the output shaft is deviated from an axis of a united rotary driving shaft comprising the driving shaft of the rotary driving device, the cam shaft and the cam sleeve, wherein the output shaft has, at a rear end thereof, a contact portion for contacting the cam surface to be moved reciprocatingly in accordance with rotation of the united rotary driving shaft, and holds detachably a carving cutter at a front end thereof.
3 more elements
A power carving tool which comprises:
- a) a housing;
- b) a rotary driving device;
- c) a cam shaft which is engaged with a driving shaft of the rotary driving device so as to be rotated together with the driving shaft;
- d) a cam sleeve which is rotated with the cam shaft, which is held by a ball bearing supported in the housing so as to be rotated together with an inner ring of the ball bearing, and which has, at a front face thereof, a cam surface;
- and
- e) an output shaft which is disposed in such a manner that an axis of the output shaft is deviated from an axis of a united rotary driving shaft comprising the driving shaft of the rotary driving device, the cam shaft and the cam sleeve,
- wherein the output shaft has, at a rear end thereof, a contact portion for contacting the cam surface to be moved reciprocatingly in accordance with rotation of the united rotary driving shaft, and holds detachably a carving cutter at a front end thereof,
- wherein the cam shaft has, at an outer surface thereof, a plurality of projections for engaging a plurality of recesses provided at a rear edge of the cam sleeve, and
- wherein the cam sleeve has, at a front outer surface thereof, a flange abutting against a front face of the inner ring of the ball bearing, a stop ring being provided on an engaging outer surface between the projections of the cam shaft and the recesses of the cam sleeve to prevent the cam sleeve from coming out of the cam shaft, a spacer ring being provided between a rear face of the inner ring of the ball bearing and the stop ring to prevent the cam sleeve from moving with respect to the ball bearing.
6 more elements
A power carving tool which comprises:
- a) a housing;
- b) a rotary driving device;
- c) a cam shaft which is engaged with a driving shaft of the rotary driving device so as to be rotated together with the driving shaft;
- d) a cam sleeve which is rotated with the cam shaft, which is held by a ball bearing supported in the housing so as to be rotated together with an inner ring of the ball bearing, and which has, at a front face thereof, a cam surface;
- and
- e) an output shaft which is disposed in such a manner that an axis of the output shaft is deviated from an axis of a united rotary driving shaft comprising the driving shaft of the rotary driving device, the cam shaft and the cam sleeve,
- wherein the output shaft has, at a rear end thereof, a contact portion for contacting the cam surface to be moved reciprocatingly in accordance with rotation of the united rotary driving shaft, and holds detachably a carving cutter at a front end thereof,
- wherein the cam shaft has, at an outer surface thereof, a plurality of projections for engaging a plurality of recesses provided at a rear edge of the cam sleeve, and
- wherein the cam sleeve has, at a front outer surface thereof, a flange abutting against a front face of the inner ring of the ball bearing, part of the projections being extended outwardly so as to abut against a rear face of the inner ring of the ball bearing, a stop ring being provided on an engaging outer surface between the projections of the cam shaft and the recesses of the cam sleeve.
6 more elements
Dependencies are inferred from the claim text.