US 12,466,048 B2 · Reciprocating tool having offset spur gear and counterweighting assembly

Abstract

A reciprocating power tool includes a transmission that converts rotational force from a motor to linear forces output by a reciprocating device and a counterbalancing device. The transmission is a parallel axis transmission including a first gear portion and a second gear portion formed on a gear shaft, with the first gear portion and the second gear portion rotating together about a first rotational axis. The first gear portion rotates a first output gear and the second gear portion rotates a second output gear about a second rotational axis that is parallel to and offset from the first rotational axis. The first output gear drives the reciprocating device and the second output gear drives the counterbalancing device. The reciprocating device reciprocates linearly and the counterbalancing devices performs a linear reciprocating movement that is opposite that of the reciprocating device to counterbalance forces generated by operation of the reciprocating device.

Claims26

Dependent claims

A reciprocating power tool, comprising:

a motor;
a reciprocating device;
a counterbalancing device;
and
a transmission coupled between the motor and the reciprocating device, and between the motor and the counterbalancing device, wherein the transmission includes a gear shaft configured to rotate in response to a driving force from the motor, the gear shaft including:
a first gear portion formed on a first portion of the gear shaft, the first gear portion driving a first output gear, the first output gear driving the reciprocating device;
and
a second gear portion formed on a second portion of the gear shaft, the second gear portion driving a second output gear, the second output gear driving the counterbalancing device.

5 more elements

A reciprocating power tool, comprising:

a motor;
a reciprocating device;
a counterbalancing device;
and
a parallel axis transmission coupled between the motor and the reciprocating device, and between the motor and the counterbalancing device, and including a gear shaft with a first gear portion that drives a first output gear that drives the reciprocating device and a second gear portion that drives a second output gear that drives the counterbalancing device to convert a rotational force output by the motor to a linear reciprocating movement of the reciprocating device, and to a linear reciprocating movement of the counterbalancing device that is opposite that of the reciprocating device so as to balance the linear reciprocating movement of the reciprocating device.

2 more elements

Dependencies are inferred from the claim text.

Reciprocating tool having offset spur gear and counterweighting assembly

Life of this patent

Reciprocating tool having offset spur gear and counterweighting assembly

Life of this patent

Abstract

Claims26