Rotary power tool including transmission housing bushing
AssigneeMilwaukee Electric Tool Corporation
InventorsRyan A. Dedrickson, Ian Allen Duncan, Tian Yu, Jian Wei Li
Life of this patent
Estimating the term…
Abstract
A rotary power tool comprises a drive mechanism including an electric motor and a transmission, a housing enclosing at least a portion of the drive mechanism, a spindle rotatable in response to receiving torque from the drive mechanism, a first ratchet coupled for co-rotation with the spindle, a second ratchet rotationally fixed to the housing, a sleeve bushing supported by the housing, and a bearing rotatably supporting the spindle. The spindle has an outer race. And, the outer race of the bearing moves along the sleeve bushing during reciprocation of the spindle when the first ratchet and second ratchet are engaged.
Claims18
A rotary power tool comprising:
- a drive mechanism including an electric motor and a transmission;
- a housing enclosing at least a portion of the drive mechanism;
- a spindle rotatable in response to receiving torque from the drive mechanism;
- a first ratchet coupled for co-rotation with the spindle;
- a second ratchet rotationally fixed to the housing;
- a sleeve bushing supported by the housing;
- and
- a bearing rotatably supporting the spindle, the bearing having an outer race,
- wherein the spindle is movable relative the housing in response to contact with a workpiece, causing the first and second ratchets to engage and the spindle to reciprocate while rotating,
- wherein the outer race of the bearing moves along the sleeve bushing during reciprocation of the spindle when the first ratchet and second ratchet are engaged, and
- wherein the sleeve bushing is formed of a first material and the housing is formed of a second material that is softer than the first material.
A rotary power tool comprising:
- a drive mechanism including an electric motor and a transmission;
- a housing enclosing at least a portion of the drive mechanism;
- a spindle rotatable in response to receiving torque from the drive mechanism;
- a first ratchet coupled for co-rotation with the spindle;
- a second ratchet rotationally fixed to the housing;
- a sleeve bushing supported by the housing;
- and
- a bearing rotatably supporting the spindle, the bearing having an outer race,
- wherein the spindle is movable relative the housing in response to contact with a workpiece, causing the first and second ratchets to engage and the spindle to reciprocate while rotating,
- wherein the outer race of the bearing moves along the sleeve bushing during reciprocation of the spindle when the first ratchet and second ratchet are engaged, and
- wherein the sleeve bushing is shrink fit with the housing.
A rotary power tool comprising:
- a drive mechanism including an electric motor and a transmission;
- a housing enclosing at least a portion of the drive mechanism, the housing including an annular portion;
- a spindle rotatable in response to receiving torque from the drive mechanism;
- a first ratchet coupled for co-rotation with the spindle;
- a second ratchet rotationally fixed to the housing;
- a sleeve bushing disposed between the spindle and the housing;
- and
- a bearing rotatably supporting the spindle,
- wherein the spindle is movable relative to the annular portion of the housing in response to contact with a workpiece, causing the first and second ratchets to engage and the spindle to reciprocate while rotating,
- wherein the bearing moves along the sleeve bushing during reciprocation of the spindle when the first ratchet and second ratchet are engaged, and
- wherein the sleeve bushing is formed of a first material and the housing is formed of a second material that is softer than the first material.
Dependencies are inferred from the claim text.