Lubricant sensor

Patent metadata

Field	Value
Publication number	US-9201054-B2
Application number	US-201113991133-A
Country	US
Kind code	B2
Filing date	Dec 2, 2011
Priority date	Dec 2, 2010
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

A speed reducer for an industrial robot includes a speed reducer main body and a lubricant deterioration sensor for detecting deterioration of a lubricant in the speed reducer main body. The lubricant deterioration sensor includes a light emitting element for emitting light, a color light receiving element for detecting a color of received light, a clearance forming member forming an oil clearance in which the lubricant enters, and a support member supporting the light emitting element, the color light receiving element, and the clearance forming member. The clearance forming member is transmissive so that the light emitted from the light emitting element transmits therethrough. The oil clearance is provided on an optical path from the light emitting element to the color light receiving element.

First claim

The invention claimed is:

1. A lubricant sensor, comprising:
a white light emitting element configured to emit light;
a color light receiving element, arranged with the white light emitting element side by side, and configured to detect color of the light;
a clearance forming member forming an oil clearance in which a lubricant enters;
a support member supporting the white light emitting element, the color light receiving element and the clearance forming member; and
an op…

Assignees

• Shirata Takuya
• Nabtesco Corp

Inventors

• Shirata Takuya

Classifications

• G01N33/2888 Primary

  Physics · mapped topic

• G01N21/8507

  Physics · mapped topic

• G01N2201/062

  Physics · mapped topic

• G01N21/251

  Physics · mapped topic

• G01N21/94 Primary

  Physics · mapped topic