Workpiece support device

Patent metadata

Field	Value
Publication number	US-11135685-B2
Application number	US-202016892806-A
Country	US
Kind code	B2
Filing date	Jun 4, 2020
Priority date	Aug 23, 2019
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

A workpiece support device including a base; a conducting rotary table that supports a workpiece and that is rotatable about a horizontal rotation axis; a motor that rotationally drives the rotary table; a collecting brush disposed on the base slidable on the outer circumferential surface of a conducting shaft fixed to the rotary table and extending along the rotation axis; a connection terminal that is electrically connected to the collecting brush and to which an external cable is connected; and a liquid-proof cover surrounding the collecting brush and the outer circumferential surface of the shaft. The liquid-proof cover includes an upper back-plate portion that is disposed at the same position as the rear end of the motor, and a lower back-plate portion located below the upper back-plate portion and forming a recess. The connection terminal penetrates through the lower back-plate portion and projects into the recess.

First claim

The invention claimed is:

1. A workpiece support device comprising:
a base;
a conducting rotary table that supports a workpiece and that is supported by the base so as to be rotatable about a horizontal rotation axis;
a motor that is disposed parallel to, and offset from, the rotation axis and that rotationally drives the rotary table;
a collecting brush disposed on the rear side of the base so as to be slidable on the outer circumferential surface of a conducting shaft fixed to the rotary table and extending along the rotation axis;
a connection terminal that is electrically connected to the collecting brush by a conducting member and to which an external cable connected to an external welding power supply is connected; and
a liquid-proof cover surrounding the collecting brush and the outer circumferential surface of the shaft in a liquid-tight state,
wherein the liquid-proof cover includes an upper back-plate portion that is disposed at substantially the same position as the rear end of the motor, and a lower back-plate portion located below the upper back-plate portion and forming a recess recessed toward the front side, and
the connection terminal penetrates through the lower back-plate portion in the thickness direction thereof and projects into the recess.

2. The workpiece support device according to claim 1 , wherein
the lower back-plate portion has an inclined portion inclined downward toward the front side from the upper back-plate portion, and
the connection terminal is disposed at the inclined portion.

3. The workpiece support device according to claim 1 , further comprising:
a motor cover surrounding the motor in a liquid-tight state;
a motor connector that is provided through the motor cover and to which an external motor cable is connected;
and a relay cable connecting the motor connector and the motor,
wherein the motor cover has a back-plate cover portion covering the rear end of the motor, and a recess cover portion recessed further toward the front side than the back-plate cover portion, and
the motor connector is provided at the recess cover portion.

Assignees

• Fanuc Corp

Inventors

• Inoue Toshihiko
• Nagai Tooru

Classifications

• H01R39/36

  Connections of cable or wire to brush · CPC title

• B23K37/0461

  Welding tables · CPC title

• B23K37/047 Primary

  moving work to adjust its position between soldering, welding or cutting steps (B23K37/053 takes precedence) · CPC title

• H02K13/00 Primary

  Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings (supporting or protecting brushes or brush holders in motor casings or enclosures H02K5/14); Disposition of current collectors in motors or generators; Arrangements for improving commutation · CPC title

• B23K9/32 Primary

  Accessories · CPC title