Rotary joint support structure spindle of machine tool, and electric motor

Patent metadata

Field	Value
Publication number	US-2016167185-A1
Application number	US-201514966033-A
Country	US
Kind code	A1
Filing date	Dec 11, 2015
Priority date	Dec 16, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A rotary joint support structure includes a rotary joint holding part which covers contact parts between a rotating side member and a stationary side member, at least one drain hole which extends from the outside to the rotary joint holding part, a first cleaning passage which communicates with the rotary joint holding part, a hollow shaft holding part which covers the hollow shaft and hollow shaft surrounding part, at least one cutaway part which is formed so as to communicate the outside with the hollow shaft holding part, and a second cleaning passage which is formed inside the housing corresponding to the at least one cutaway part.

First claim

What is claimed is:

1 . A rotary joint support structure, comprising
a rotary joint which includes a rotating side member and a stationary side member which are provided with bores which communicate with each other, a housing which supports said stationary side member, a hollow shaft which is connected to said rotating side member, a hollow shaft surrounding part which surrounds said hollow shaft, a rotary joint holding part which is formed inside said housing and covers contact parts between said rotating side member and stationary side member, at least one drain hole which extends from an outside of said housing to said rotary joint holding part, a first cleaning passage which is formed inside said housing and is communicated with said rotary joint holding part, a hollow shaft holding part which is formed inside said housing and covers said hollow shaft and said hollow shaft surrounding part, at least one cutaway part which is formed so as to communicate an outside of said housing with said hollow shaft holding part, and a second cleaning passage which is formed inside said housing corresponding to said at least one cutaway part.

2 . A rotary joint support structure according to claim 1 which further comprises a flinger which is integrally attached to said hollow shaft.

3 . A rotary joint support structure according to claim 1 , wherein said first cleaning passage and said second cleaning passage are communicated with each other.

4 . A rotary joint support structure according to claim 1 , wherein at least one of said first cleaning passage and said second cleaning passage is provided with a stopper part which opens only at the time of cleaning.

5 . A rotary joint support structure according to claim 1 , wherein at least one of said first cleaning passage and said second cleaning passage has a cleaning use fluid source connected to it.

6 . A rotary joint support structure according to claim 5 further comprising a control device which controls at least one of a flow rate, pressure, feed timing, and feed time of a fluid which is fed from said cleaning use fluid source to at least one of said first cleaning passage and said second cleaning passage.

7 . A spindle of a machine tool which comprises a rotary joint support structure according to claim 1 .

8 . An electric motor which comprises a rotary joint support structure according to claim 1 .

Assignees

• Fanuc Corp

Inventors

• Nakazawa Yasuyuki

Classifications

• B23Q11/103 Primary

  Rotary joints specially adapted for feeding the cutting liquid to the spindle · CPC title

• F16L27/00

  Adjustable joints; Joints allowing movement (of the quick-acting type F16L37/50; for double-walled or multi-channel pipes or pipe assemblies F16L39/04 {; specially adapted to be made of plastics or to be used with pipes made of plastics F16L47/18; specially adapted for pipes of brittle material F16L49/08}) · CPC title

• F16L39/04

  allowing adjustment or movement · CPC title