Variable-speed, multiple-drive power tool
AssigneeIntool Incorporated
InventorBruce A. Thames
Life of this patent
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Abstract
A variable-speed, multiple-drive, power tool (10) is driven by first motor (18) having a first longitudinal axis (32) and second motor (20) having a second longitudinal axis (100). Second motor (20) drives ring gear (52) of first planetary gear set (48) while first motor (18) drives pinion (36). First end (40) of pinion (36) serves as sun gear (46) for first planetary gear set (48). First planetary gear set (48) drives intermediate spindle (76). Intermediate spindle (76) in turn drives second planetary gear set (82). Second planetary gear set (82) drives output spindle (22) through gear element (90).
Claims18
A variable-speed, multiple-drive power tool, for providing output rotation at a desired speed and torque such that the output may vary over a range from a relative high speed/low torque output condition to a relative low speed/high torque output condition, the power tool comprising:
- a housing having a cavity formed therein;
- a first motor secured within the cavity of the housing;
- a first output drive shaft coupled to the first motor and the first output drive shaft defining a first longitudinal axis and having a first end;
- a second motor secured within the cavity of the housing;
- a second output drive shaft coupled to the second motor and the second output drive shaft defining a second longitudinal axis and having a first end, the first longitudinal axis of the first output drive shaft and the second longitudinal axis of the second output drive shaft being displaced from one another;
- a planetary gear set having a plurality of idler gears, a sun gear coupled to the first end of the first output drive shaft and rotatably coupled with the plurality of idler gears, and a ring gear rotatably coupled with the plurality of idler gears;
- a second gear coupled to the first end of the second output drive shaft for rotatably driving the ring gear of the planetary gear set;
- an output spindle having a longitudinal axis, the output spindle coupled to the plurality of idler gears for providing a rotational output;
- and
- wherein the first longitudinal axis and second longitudinal axis are displaced from the longitudinal axis of the output spindle.
A variable-speed, multiple-drive power tool for providing output rotation at a desired speed and torque such that the output may vary over a range from a relative high speed/low torque output condition to a relative low speed/high torque output condition, the power tool comprising:
- a housing having a cavity formed therein;
- a first motor secured within the cavity of the housing;
- a first output drive shaft coupled to the first motor, the first output drive shaft having a first longitudinal axis and having a first end;
- a second motor secured within the cavity of the housing;
- a second output drive shaft coupled to the second motor, the second output drive shaft having a second longitudinal axis and having a first end;
- a planetary gear set having a plurality of idler gears, a sun gear coupled to the first end of the first output drive shaft and rotatably coupled with the plurality of idler gears, and a ring gear rotatably coupled with the plurality of idler gears;
- a second gear coupled to the first end of the second output drive shaft for rotatably driving the ring gear of the planetary gear set, the sun gear and second gear operable to rotate the planetary gear set;
- an output spindle having a longitudinal axis, the output spindle coupled to the plurality of idler gears for providing a rotational output;
- wherein the first longitudinal axis is displaced from the second longitudinal axis;
- and
- wherein the first longitudinal axis and second longitudinal axis are displaced from the longitudinal axis of the output spindle.
A variable-speed, multiple-drive power tool, for providing output rotation at a desired speed and torque such that the output may vary over a range from a relative high speed/low torque output condition to a relative low speed/high torque output condition, the power tool comprising:
- a housing having a cavity formed therein;
- a first motor secured within the cavity of the housing;
- a first output drive shaft coupled to the first motor and the first output drive shaft defining a first longitudinal axis and having a first end;
- a second motor secured within the cavity of the housing;
- a second output drive shaft coupled to the second motor and the second output drive shaft defining a second longitudinal axis and having a first end, the first longitudinal axis of the first output drive shaft and the second longitudinal axis of the second output drive shaft being displaced from one another;
- a first gear coupled to the first end of the first output drive shaft;
- a pinion having a first end and a second end;
- a second gear coupled to the second end of the pinion, the first gear and second gear being rotatably coupled;
- a planetary gear set having a plurality of idler gears, a sun gear coupled to the first end of the pinion and rotatably coupled with the plurality of idler gears, and a ring gear rotatably coupled with the plurality of idler gears;
- a third gear coupled to the first end of the second output drive shaft for rotatably driving the ring gear of the planetary gear set, the pinion and the third gear operable to rotate the planetary gear set;
- an output spindle having a longitudinal axis, the output spindle coupled to the plurality of idler gears for providing a rotational output;
- and
- wherein the first longitudinal axis and second longitudinal axis are displaced from the longitudinal axis of the output spindle.
Dependencies are inferred from the claim text.