Sealing structure, vacuum pump motor including same sealing structure, and vacuum pump

Patent metadata

Field	Value
Publication number	US-9429166-B2
Application number	US-201313960283-A
Country	US
Kind code	B2
Filing date	Aug 6, 2013
Priority date	Aug 16, 2012
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A sealing structure for a vacuum pump motor which maintains the sealing properties of the vacuum pump motor in an ensured fashion, including a lead wire which is passed through an opening portion formed in a motor frame to be connected to a motor stator and a seal member which seals the opening portion. The lead wire includes a core wire portion and a covering portion which covers the core wire portion. The lead wire also includes a seal portion formed around at least part of the core wire portion inside the covering portion.

First claim

What is claimed is:

1. A sealing structure for a vacuum pump motor, comprising:
a lead wire which passes through an opening formed in a motor frame, wherein the lead wire is configured to be connected to a motor stator; and
a seal member which seals the opening, wherein
the lead wire comprises core wires and a covering which covers the core wires, wherein a seal is formed around at least part of the core wires inside the covering, and wherein
the seal comprises a sealing treatment in which part of the covering is removed to partially integrate intermediate portions of the core wires into a single wire assembly through soldering, the intermediate portions being any portions other than ends of the core wires, and wherein the seal is covered by a heat-shrinkable tube via a sealing medium.

2. The sealing structure according to claim 1 , wherein
the seal member is made of an elastic rubber, and wherein a drilled hole through which the lead wire is passed is formed in the seal member.

3. The sealing structure according to claim 2 , wherein
the elastic rubber is attached to the opening in the motor frame while being compressed by a fastening plate.

4. A vacuum pump motor with the sealing structure according to claim 1 , comprising:
a motor rotor which is connected directly to a pump main shaft of a vacuum pump.

5. The vacuum pump motor according to claim 4 , wherein
a can which closes securely the motor rotor is provided between the motor stator and the motor rotor.

6. A vacuum pump, comprising the sealing structure according to claim 1 .

7. A vacuum pump, comprising the vacuum pump motor according to claim 4 .

Assignees

• Ebara Corp

Inventors

• Inada Takanori
• Yoshida Naoya
• Hozumi Takashi
• Ojima Yoshinori
• Nakazawa Toshiharu

Classifications

• H02K5/12

  specially adapted for operating in liquid or gas (combined with cooling arrangements H02K9/00) · CPC title

• F04D29/08 Primary

  Sealings · CPC title

• F04C29/0085

  Prime movers · CPC title

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• F04C15/008 Primary

  Prime movers · CPC title