Mechanism in a powered hand-held rotary driver for counteracting reaction torque
AssigneeGene W. Arant
InventorAlexander S. Gotman
Life of this patent
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Abstract
A powered hand-held rotary tool adapted for preventing an externally manifested reaction torque upon the hand of an operator consists of a housing, a rotor adapted to be driven for rotation relative to the housing, and a planetary differential mechanism having a sun gear coaxial with and driven from the rotor, planetary gears, and a ring gear. The ring gear is rotatable relative to the housing. A first output gear is coaxial with the sun gear and rotatably driven by the planetary gears. An additional output gearing is rotatably supported from the housing on an axis that is laterally offset from the axis of the rotor, and is drivingly engaged by the ring gear. Rotation of the additional gearing in one direction relative to the housing is inhibited.
Claims17
In a hand operated rotary power tool having a housing, a mechanism for counteracting reaction torque that would otherwise be exhibited directly on the housing, said mechanism comprising:
- a powered rotor rotatable on a defined axis with respect to the housing;
- a planetary differential mechanism including a ring gear rotatably supported from the housing, a sun gear rotatably supported from the housing being coaxial with said rotor, and a set of planetary gears coacting with both said sun gear and said ring gear, said sun gear being rotatably driven by said rotor;
- an output coaxial with both said rotor and said sun gear and drivingly coupled to said set of planetary gears so as to be rotatably driven thereby;
- a shaft rotatably supported from the housing on an axis that is laterally offset from the axis of said rotor, said ring gear being drivingly coupled to said laterally offset shaft;
- and
- means for inhibiting rotation of said laterally offset shaft relative to the housing in the direction that said output rotates relative to the housing.
In a powered hand-held rotary tool which consists of a housing, a rotor adapted to be driven for rotation relative to the housing, and a planetary differential mechanism having a sun gear coaxial with and driven from the rotor, planetary gears, and a ring gear;
- mechanism for counteracting reaction torque of the housing that would otherwise be externally manifested, said reaction torque counteraction mechanism comprising:
- an output coaxial with the sun gear and rotatably driven by the planetary gears;
- means supporting the ring gear for rotation relative to the housing;
- a shaft rotatably supported from the housing on an axis that is laterally offset from the axis of the rotor;
- the ring gear being drivingly coupled to said laterally offset shaft;
- and
- means for inhibiting the rotation of said laterally offset shaft relative to said housing in the direction that said output rotates relative to said housing.
Dependencies are inferred from the claim text.