Spindle device

Patent metadata

Field	Value
Publication number	US-10758985-B2
Application number	US-201916550683-A
Country	US
Kind code	B2
Filing date	Aug 26, 2019
Priority date	Aug 31, 2018
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

In a spindle device, a movable member is provided on a cover member, which is attached to a spindle housing and covers the outer peripheral surface of a chuck portion which is a disk-shaped rotating member. The movable member is moved by a gas flowing through a flow passage formed in the cover member and thereby brought into contact with the chuck portion. The movable member is electrically connected to a ground.

First claim

What is claimed is:

1. A spindle device comprising:
a spindle housing;
a conductive spindle shaft rotatably supported inside the spindle housing;
a conductive disk-shaped rotating member provided at one end of the spindle shaft and configured to be rotatable on a surface of the spindle housing on one end side of the spindle shaft;
a cover member attached to the spindle housing and configured to cover an outer peripheral surface of the disk-shaped rotating member;
a flow passage formed in the cover member and configured to flow a gas from outside of the cover member to a clearance between the disk-shaped rotating member and the cover member; and
a conductive movable member provided on the cover member or the spindle housing so as to be electrically connected to a ground and configured to be moved by the gas flowing through the flow passage and thereby brought into contact with the disk-shaped rotating member.

2. The spindle device according to claim 1 , wherein the flow passage is a flow path for flowing the gas that seals the clearance.

3. The spindle device according to claim 1 , wherein the movable member has resilience and is configured to be bent by the gas flowing through the flow passage and thereby contact the disk-shaped rotating member.

4. The spindle device according to claim 1 , wherein the movable member is formed into a plate shape, and one end side of the movable member is detachably fixed to the cover member while another end side thereof is moved by the gas flowing through the flow passage.

5. The spindle device according to claim 4 , wherein the other end side of the movable member is disposed so as to close part of an outlet of the flow passage.

Assignees

• Fanuc Corp

Inventors

• Murota Masahiro

Classifications

• B23Q2220/006

  Spindle heads · CPC title

• B23Q3/088

  using vacuum means · CPC title

• B23Q11/005

  by blowing · CPC title

• F16C33/72

  Sealings · CPC title

• B23Q11/127

  for cooling motors or spindles · CPC title