Battery-powered stand-alone motor unit

Patent metadata

Field	Value
Publication number	US-11791687-B2
Application number	US-202017132754-A
Country	US
Kind code	B2
Filing date	Dec 23, 2020
Priority date	Dec 23, 2019
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

A stand-alone motor unit for use with a piece of power equipment includes a housing, a flange coupled to the housing on a first side thereof and a slot in the flange. The slot is configured to receive a protrusion of the piece of power equipment. An electric motor is located within the housing. A power take-off shaft receives torque from the motor and protrudes from a second side of the housing adjacent the first side. A battery pack provides power to the motor.

First claim

What is claimed is:

1. A stand-alone motor unit for use with a piece of power equipment, the motor unit comprising:
a housing;
a flange coupled to the housing on a first side thereof;
a slot in the flange, the slot configured to receive a protrusion of the piece of power equipment;
an electric motor located within the housing;
a power take-off shaft receiving torque from the motor and protruding from a second side of the housing adjacent the first side; and
a battery pack to provide power to the motor;
wherein the slot includes a first portion having a first surface width at the outer surface of the flange and a first base width at the base of the slot,
wherein the slot includes a second portion having a second surface width at the outer surface of the flange, and a second base width at the base of the slot, and
wherein the second surface width is less than the first surface width and the second base width.

2. The stand-alone motor unit of claim 1 ,
wherein the slot has a slot depth defined between an outer surface of the flange and a base of the slot, and
wherein the protrusion has a height that is nominally smaller than the slot depth.

3. The stand-alone motor unit of claim 1 , wherein the second base width is less than the first base width.

4. The stand-alone motor unit of claim 1 , wherein the slot is one of a plurality of slots in the flange and the protrusion is one of a plurality of protrusions of the power equipment unit, and wherein each slot is configured to receive one of the plurality of protrusions when the stand-alone motor unit is coupled to the power equipment unit.

5. A power equipment assembly comprising:
a stand-alone motor unit including
a housing,
a flange coupled to the housing on a first side thereof,
a slot in the flange,
an electric motor located within the housing,
a power take-off shaft receiving torque from the motor and protruding from a second side of the housing adjacent the first side, and
a battery pack to provide power to the motor; and

a power equipment unit configured to receive torque from the power take-off shaft when the stand-alone motor unit is coupled to the power equipment unit, the power equipment unit including a protrusion configured be received in the slot when the stand-alone motor unit is coupled to the power equipment unit.

6. The power equipment assembly of claim 5 ,
wherein the slot has a slot depth defined between an outer surface of the flange and a base of the slot, and
wherein the protrusion has a height that is nominally smaller than the slot depth.

7. The power equipment assembly of claim 6 ,
wherein the slot includes a first portion having a first surface width at the outer surface of the flange and a first base width at the base of the slot,
wherein the slot includes a second portion having a second surface width at the outer surface of the flange, and a second base width at the base of the slot, and
wherein the second surface width is less than the first surface width and the second base width.

8. The power equipment assembly of claim 7 , wherein the second base width is less than the first base width.

9. The power equipment assembly of claim 8 , wherein the protrusion includes a stem and a pair of legs extending orthogonal to the stem.

10. The power equipment assembly of claim 9 , wherein the legs collectively define a protrusion width that is nominally smaller than the second base width.

11. The power equipment of claim 10 , wherein when the stand-alone motor unit is coupled to the power equipment unit, each leg is respectively arranged in one of the recesses, such that the legs are respectively inhibited by the overhangs from moving in a direction away from the base of the slot.

12. The power equipment of claim 11 , wherein to couple the stand-alone motor unit to the power equipment unit, the protrusion is moved in a first direction into the first portion of the slot until the protrusion is in a first position in the slot, in which each leg is adjacent the base of the slot, and the protrusion is subsequently moved in a second direction from the first position in the slot to a second position in the slot, in which each leg is respectively arranged in one of the recesses, and wherein the second direction is perpendicular to the first direction.

13. The power equipment of claim 12 , wherein to decouple the stand-alone motor unit from the power equipment unit, the protrusion is moved from the second position in the slot to the first position in the slot, and subsequently moved in a direction opposite the first direction.

14. The power equipment assembly of claim 7 , wherein a pair of recesses are defined between a pair of overhangs and the base in the second portion.

15. The power equipment assembly of claim 5 , wherein the slot is one of a plurality of slots in the flange and the protrusion is one of a plurality of protrusions of the power equipment unit, and wherein each slot is configured to receive one of the protrusions when the stand-alone motor unit is coupled to the power equipment unit.

16. A stand-alone motor unit for use with a piece of power equipment, the motor unit comprising:
a housing;
a flange coupled to the housing on a first side thereof;
a slot in the flange, the slot configured to receive a protrusion of the piece of power equipment;
an electric motor located within the housing;
a power take-off shaft receiving torque from the motor and protruding from a second side of the housing adjacent the first side; and
a battery pack to provide power to the motor;
wherein the slot is one of a plurality of slots in the flange and the protrusion is one of a plurality of protrusions of the power equipment unit, and wherein each slot is configured to receive one of the plurality of protrusions when the stand-alone motor unit is coupled to the power equipment unit.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Sprague Connor P
• Glanzer Evan M
• Koller John E

Classifications

• H02K7/003 Primary

  Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28) · CPC title

• H02K7/116

  with gears · CPC title

• H02K9/227

  Heat sinks · CPC title

• H02K11/0094

  Structural association with other electrical or electronic devices · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title