Bearing structure for a reciprocating shaft in a reciprocating saw
AssigneeBlack & Decker Inc.
InventorsMichael Anthony Lagaly, Thomas Amold Mooty, James Pierce Nichols, Jr., Earl Roger Clowers, Matthew George Popik
Life of this patent
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Abstract
A reciprocating shaft assembly in a reciprocating saw moves in a reciprocal motion and drives a saw blade via a blade holder. At least one bore is formed in an end of the reciprocating shaft assembly opposite the blade holder. A pin fixed to the saw passes through the bore and acts as a bearing to support the reciprocating shaft assembly in its reciprocating motion.
Claims9
A handheld power tool comprising a motion conversion mechanism to convert rotary motion into reciprocating motion, the hand held power tool comprising a counterweight, the counterweight comprising:
- a first slot adapted to receive a driving shaft for driving the counterweight in a reciprocating motion;
- and
- a first slide adapted to support the counterweight for reciprocating motion,
- the slide comprising a first tab extending from the counterweight in a direction substantially perpendicular to an axis of reciprocating motion,
- the first tab adapted to be received for sliding in a slot formed in a drive housing at least partially enclosing the motion conversion mechanism, the drive housing residing in, and formed separate from, an outer housing of the hand-held power tool.
A handheld power tool comprising a motion conversion mechanism to convert rotary motion into reciprocating motion, the hand held power tool comprising a counterweight, the counterweight comprising:
- a first slot adapted to receive a driving shaft for driving the counterweight in a reciprocating motion;
- and
- a first slide adapted to support the counterweight for reciprocating motion,
- the slide comprising a first tab extending from the counterweight in a direction substantially perpendicular to an axis of reciprocating motion,
- the first tab adapted to be received for sliding in a slot formed in a drive housing at least partially enclosing the motion conversion mechanism, the drive housing residing in, and formed separate from, an outer housing,
- wherein the counterweight is adapted to at least partially surround a crank gear.
A handheld power tool comprising a motion conversion mechanism to convert rotary motion into reciprocating motion, the hand held power tool comprising a counterweight, the counterweight comprising:
- a first slot adapted to receive a driving shaft for driving the counterweight in a reciprocating motion;
- and
- a first slide adapted to support the counterweight for reciprocating motion,
- the slide comprising a first tab extending from the counterweight in a direction substantially perpendicular to an axis of reciprocating motion,
- the first tab adapted to be received for sliding in a slot formed in a drive housing at least partially enclosing the motion conversion mechanism, the drive housing residing in, and formed separate from, an outer housing,
- wherein the counterweight comprises at least one surface adjacent to a crank gear which surface has a radius of curvature substantially corresponding to that of the crank gear.
Dependencies are inferred from the claim text.