Multi-stage transmission for a power tool

Patent metadata

Field	Value
Publication number	US-9108312-B2
Application number	US-201314023766-A
Country	US
Kind code	B2
Filing date	Sep 11, 2013
Priority date	Sep 11, 2012
Publication date	Aug 18, 2015
Grant date	Aug 18, 2015

Abstract

A multi-stage planetary transmission includes a transmission housing and a first planetary stage at least partially positioned in a transmission housing. The first planetary stage includes a first stage ring gear, a first stage carrier, and a plurality of first stage planet gears supported by the first stage carrier. A motor output pinion is engaged with each of the first stage plant gears. The transmission further includes a second planetary stage positioned downstream of the first planetary stage to receive torque from the first planetary stage and a shift mechanism operable to move the first stage ring gear between a first position, in which the first stage ring gear is rotatably fixed relative to the transmission housing for enabling the first planetary stage, and a second position, in which the first stage ring gear is coupled for co-rotation with the first stage carrier for disabling the first planetary stage.

First claim

What is claimed is:

1. A multi-stage planetary transmission powered by an electric motor having an output pinion, the transmission comprising:
a transmission housing;
a first planetary stage at least partially positioned in the transmission housing and including
a first stage ring gear,
a first stage carrier, and
a plurality of first stage planet gears supported by the first stage carrier and rotatable relative thereto, the motor output pinion being engaged with each of the…

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Elger William A
• Limberg Kurt
• Kapelevich Alexander L

Classifications

• B25F5/001 Primary

  Operations & Transport · mapped topic