Motor and mechanism having function of increasing or decreasing brake torque

Patent metadata

Field	Value
Publication number	US-9956694-B2
Application number	US-201715454025-A
Country	US
Kind code	B2
Filing date	Mar 9, 2017
Priority date	Mar 25, 2016
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A motor according to the present invention includes an output axis, a brake for holding the output axis, a sensor for detecting an external torque applied to the output axis from outside, and a controller for decreasing or increasing the torque of the brake during operation of the brake in accordance with an increase or decrease in the external torque detected by the sensor.

First claim

What is claimed is:

1. A motor comprising:
an output axis;
a brake for holding the output axis by applying a brake torque, the output axis being locked when the brake torque is applied on the output axis;
a sensor for detecting an external torque applied to the output axis from outside; and

a controller for decreasing or increasing the brake torque during operation of the brake in accordance with an increase or decrease in the external torque detected by the sensor so as to rotate the output axis.

2. The motor according to claim 1 , further comprising a rechargeable power supply for supplying power to the brake, the sensor, and the controller.

3. A robot comprising the motor according to claim 1 .

4. A mechanism having a drive motor, comprising:
an output axis of the mechanism;
a brake for holding the output axis by applying a brake torque, the output axis being locked when the brake torque is applied on the output axis;
a sensor for detecting an external torque applied to the output axis from outside; and
a controller for decreasing or increasing the brake torque during operation of the brake in accordance with an increase or decrease in the external torque detected by the sensor so as to rotate the output axis.

5. The mechanism according to claim 4 , further comprising a rechargeable power supply for supplying power to the brake, the sensor, and the controller.

6. A robot comprising the mechanism according to claim 4 .

Assignees

• Fanuc Corp

Inventors

• Funakubo Makoto
• Nagahata Tougo

Classifications

• H02P29/0022

  Controlling a brake between the prime mover and the load · CPC title

• H02K11/24

  Devices for sensing torque, or actuated thereby (H02K11/27 takes precedence) · CPC title

• B25J13/085

  Force or torque sensors (B25J13/082, B25J13/084 take precedence) · CPC title

• B25J19/06

  Safety devices · CPC title

• B25J19/0004 Primary

  Braking devices (brakes in general F16D) · CPC title