Battery-powered stand-alone motor unit

Patent metadata

Field	Value
Publication number	US-12418220-B2
Application number	US-202017092871-A
Country	US
Kind code	B2
Filing date	Nov 9, 2020
Priority date	Nov 8, 2019
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A stand-alone motor unit for use with a piece of power equipment includes a housing, an electric motor, a battery pack to provide power to the motor, a battery receptacle arranged on the housing and configured to receive the battery pack, and a control panel arranged on either the housing or the piece of power equipment. The control panel is operable to control operation of the electric 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, the flange configured to couple the motor unit to the piece of power equipment;
an electric motor;
a battery pack to provide power to the motor;
a battery receptacle arranged on the housing and configured to receive the battery pack;
a power take-off shaft receiving torque from the motor;
a throttle in communication with the motor, the throttle movable to adjust the rotational speed of the power take-off shaft; and
a switch located adjacent the throttle;
wherein the switch is activated and the rotational speed of the power take-off shaft is adjusted, in sequence, in response to actuation of the throttle; and
wherein the throttle includes a body and an extension extending from the body, wherein the extension engages the switch to activate the switch;
wherein the extension is rotatable to engage the switch and activate the switch.

2. The motor unit of claim 1 , further comprising:
a control panel arranged on the housing, the control panel operable to control operation of the electric motor;
wherein the control panel includes:
a motor light-emitting-diode indicator operable to indicate a state of the electric motor, and
a power light-emitting-diode indicator operable to indicate a state of the battery pack.

3. The motor unit of claim 2 , wherein the control panel is removably coupled to the housing.

4. The motor unit of claim 2 , further comprising a throttle cable having a first end coupled to the throttle and a second end configured to be coupled to a throttle actuator on the piece of power equipment.

5. The motor unit of claim 2 , wherein the throttle is rotatable in a first direction to increase power drawn by the motor from the battery pack to rotate the power take-off shaft at higher rotational speeds, and wherein the throttle is rotatable in an opposite, second direction to decrease power drawn by the motor from the battery pack to rotate the power take-off shaft at lower rotational speeds.

6. The motor unit of claim 2 , wherein the throttle is biased toward a neutral position in which the motor is deactivated, wherein the throttle is rotatable in a first direction away from the neutral position to operate the motor in a first mode, and wherein the throttle is rotatable in an opposite, second direction away from the neutral position to operate the motor in a second mode that is different than the first mode.

7. The motor unit of claim 6 , wherein, when the motor is operating in the first mode, the power take-off shaft rotates in a first rotational direction, and when the motor is operating in the second mode, the power take-off shaft rotates in a second rotational direction that is opposite the first rotational direction.

8. The motor unit of claim 6 , wherein, when the motor is operating in the first mode, the motor outputs a first parameter, and when the motor is operating in the second mode, the motor outputs a second parameter that is different than the first parameter.

9. The motor unit of claim 8 , wherein the first parameter is a first horsepower and the second parameter is a second horsepower.

10. The motor unit of claim 2 , further comprising a position sensor coupled to the throttle for movement with the throttle, wherein the position sensor is operable to detect the position of the throttle to control the rotational speed of the power take-off shaft.

11. The motor unit of claim 2 , wherein the control panel includes a user input selected from the group consisting of a power button, an emergency stop, a mode selector, and a throttle dial.

12. The motor unit of claim 2 , wherein the control panel is in wireless communication with the motor.

13. The motor unit of claim 12 , wherein the motor is electrically coupled to a first wireless communication device and the control panel includes a second wireless communication device that communicates with the first wireless communication device to control operation of the motor.

14. The motor unit of claim 1 , wherein the switch is configured to arm the motor unit in response to being activated.

15. The motor unit of claim 1 , further comprising an actuator coupled to the throttle, wherein the actuator is operable to receive input from a user and, in sequence, activate the switch and the throttle to adjust the rotational speed of the power take-off shaft.

16. The motor unit of claim 1 , wherein the throttle is rotatable about a pivot axis to activate the switch.

17. The motor unit of claim 2 , wherein the throttle is a moveable throttle positioned on the control panel to control the rotational speed of the power take-off shaft.

18. The motor unit of claim 1 , further comprising a control panel arranged on the housing operable to control operation of the electric motor, wherein the throttle is arranged on the control panel, and wherein the control panel further includes:
a motor indicator operable to indicate a state of the electric motor, and
a power indicator operable to indicate a state of the battery pack.

19. The motor unit of claim 2 , wherein the control panel further includes an ON/OFF indicator configured to indicate if the motor is armed.

20. The motor unit of claim 2 , wherein the state of the electric motor is a temperature condition of the electric motor.

Assignees

• Milwaukee Electric Tool Corp

Inventors

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

Classifications

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02P6/30

  Arrangements for controlling the direction of rotation (H02P6/22 takes precedence) · CPC title

• H02K11/28

  Manual switches · CPC title

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H01M50/20

  Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46) · CPC title