Reciprocating saw
AssigneeMilwaukee Electric Tool Corporation
InventorsJames Wekwert, Logan M. Hietpas
Life of this patent
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Abstract
A reciprocating saw includes a housing defining a motor housing portion, and a motor positioned in the motor housing portion, the motor having a motor output shaft defining a rotational axis, and a motor activation switch within the motor housing portion and adjacent the motor. The reciprocating saw also includes a transmission is positioned downstream of the motor and has a sawbar connectable to a saw blade. The transmission converts a rotational input provided by the motor shaft to a reciprocating output of the sawbar along a reciprocating axis that is either coaxial or parallel with the rotational axis.
Claims20
A reciprocating saw comprising:
- a housing defining a motor housing portion;
- a motor positioned in the motor housing portion, the motor having a motor output shaft defining a rotational axis;
- a motor activation switch within the motor housing portion and adjacent the motor;
- a transmission positioned downstream of the motor and having a sawbar connectable to a saw blade, the transmission converting a rotational input provided by the motor shaft to a reciprocating output of the sawbar along a reciprocating axis that is either coaxial or parallel with the rotational axis, wherein the transmission also includes a rotatable counterweight configured to move out of phase with reciprocation of the sawbar during operation to attenuate vibration, and wherein the reciprocating axis is located between the rotational axis and the rotatable counterweight;
- and
- a ring gear including a pin eccentrically coupled thereto;
- and
- a bearing rotatably supporting the rotatable counterweight and the ring gear, wherein the bearing and the counterweight are bisected by a common plane that is parallel to the reciprocating axis.
A reciprocating saw comprising:
- a housing defining a motor housing portion;
- a motor positioned in the motor housing portion, the motor having a motor output shaft defining a rotational axis;
- and
- a transmission positioned downstream of the motor, the transmission including
- a pinion driven by the motor output shaft,
- a ring gear meshed with the pinion and having a pin eccentrically coupled thereto, and a rotatable counterweight,
- a sawbar movable along a reciprocating axis that is either coaxial or parallel with the rotational axis, the sawbar having a slot in which the pin is received, the slot extending in a direction that is transverse to both the rotational axis of the motor output shaft and the reciprocating axis of the sawbar, wherein the rotatable counterweight is configured to move out of phase with reciprocation of the sawbar during operation to attenuate vibration, and wherein the reciprocating axis is located between the rotational axis and the rotatable counterweight, and
- a bearing rotatably supporting the rotatable counterweight and the ring gear, wherein the bearing and the counterweight are bisected by a common plane that is parallel to the reciprocating axis.
Dependencies are inferred from the claim text.