Accumulator

Patent metadata

Field	Value
Publication number	US-11047399-B2
Application number	US-201816605777-A
Country	US
Kind code	B2
Filing date	Apr 27, 2018
Priority date	May 11, 2017
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

Provided is an accumulator for easier maintenance of a metal bellows. The accumulator includes a housing having a shell provided with an opening portion and a disk-shaped base body to which one end of a metal bellows with an outside diameter smaller than the inside diameter of the opening portion is welded and fixed, the interior of the housing partitioned on the inside and outside of the metal bellows in a tightly closed manner, in which the base body is formed to have an outside diameter greater than the outside diameter of the metal bellows, and the base body is fixed detachably to the shell.

First claim

The invention claimed is:

1. An accumulator comprising:
a housing having a shell provided with an opening portion and a base body formed in a disk shape; and
a bellows made of metal and having an outer diameter smaller than an inner diameter of the opening portion,
one end portion of the bellows being welded and fixed to the base body, an interior of the housing being partitioned into an inner space and an outer space of the bellows in a tightly closed manner, wherein
the base body has an outer diameter greater than the outer diameter of the bellows, and the base body is fixed detachably to the shell, and
an inner peripheral surface of the shell is provided with a restrictive stepped portion with which an outer peripheral portion of the base body is in contact.

2. The accumulator according to claim 1 , further comprising:
an annular seal member provided between the outer peripheral portion of the base body and the inner peripheral surface of the shell; and
a fixing member formed as a discrete body separate from the base body and configured to fix the base body to the shell.

3. The accumulator according to claim 2 , wherein the fixing member has an outer peripheral portion provided with a male screw portion screwed into a female threaded portion provided in the inner peripheral surface of the shell.

4. The accumulator according to claim 3 , wherein
the fixing member is annular.

5. The accumulator according to claim 2 , wherein
the fixing member is annular.

6. The accumulator according to claim 1 , wherein
the base body is provided with a through hole in communication with the inner space of the bellows.

7. The accumulator according to claim 1 , wherein
the base body is key-fitted into the shell.

8. An accumulator comprising:
a housing having a shell provided with an opening portion and a base body formed in a disk shape; and
a bellows made of metal and having an outer diameter smaller than an inner diameter of the opening portion,
one end portion of the bellows being welded and fixed to the base body, an interior of the housing being partitioned into an inner space and an outer space of the bellows in a tightly closed manner, wherein
the base body has an outer diameter greater than the outer diameter of the bellows, and the base body is fixed detachably to the shell, and
the accumulator further comprises:
an annular seal member provided between the outer peripheral portion of the base body and the inner peripheral surface of the shell; and
a fixing member formed as a discrete body separate from the base body and configured to fix the base body to the shell.

9. The accumulator according to claim 8 , wherein the fixing member has an outer peripheral portion provided with a male screw portion screwed into a female threaded portion provided in the inner peripheral surface of the shell.

10. The accumulator according to claim 9 , wherein
the fixing member is annular.

11. The accumulator according to claim 9 , wherein
the base body is provided with a through hole in communication with the inner space of the bellows.

12. The accumulator according to claim 9 , wherein
the base body is key-fitted into the shell.

13. The accumulator according to claim 8 , wherein
the fixing member is annular.

14. The accumulator according to claim 13 , wherein
the base body is provided with a through hole in communication with the inner space of the bellows.

15. The accumulator according to claim 13 , wherein
the base body is key-fitted into the shell.

16. The accumulator according to claim 8 , wherein
the base body is provided with a through hole in communication with the inner space of the bellows.

17. The accumulator according to claim 8 , wherein
the base body is key-fitted into the shell.

Assignees

• Eagle Ind Co Ltd

Inventors

• Arikawa Tatsuhiro

Classifications

• F15B15/14

  of the straight-cylinder type · CPC title

• F15B1/103 Primary

  the separating means being bellows · CPC title

• F15B2201/615

  Assembling or methods for making ports therefor · CPC title

• F15B2201/4056

  characterised by the attachment of housing components · CPC title

• F15B2201/3153

  the flexible separating means being bellows · CPC title