Butterfly valve

Patent metadata

Field	Value
Publication number	US-10197164-B2
Application number	US-201315031560-A
Country	US
Kind code	B2
Filing date	Nov 26, 2013
Priority date	Nov 26, 2013
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A bearing holding structure has a substantially cylindrical sleeve and a plate-shaped pressing plate. A tubular portion of the sleeve includes a housing press-fit portion having an outer peripheral surface to be press-fit into a recess of an upper housing, and a bearing press-fit portion having an inner peripheral surface to be press-fit thereinto by a bearing. A pullout prevention portion that protrudes inward to prevent pullout of the bearing is formed at one end of the tubular portion, and the pressing plate is press-fit into the other end thereof.

First claim

The invention claimed is:

1. A bearing holding structure for a butterfly valve, the butterfly valve including a housing formed with a fluid passage in an internal portion thereof, a valve element that opens and closes the fluid passage, a support shaft that causes the valve element to operate, and a bearing that pivotally supports the support shaft to be rotatable, the bearing holding structure comprising:
a sleeve including a tubular portion provided with a bearing press-fit portion having an inner peripheral surface receiving the bearing with a press-fit and a pullout prevention portion that protrudes inward on one end side of the tubular portion and prevents pullout of the bearing; and
a pressing plate having one end side of an outer peripheral surface that forms a housing press-fit portion which is press-fit into the housing and another end side of the outer peripheral surface that is press-fit into an opening end of the sleeve on a side opposite to the pullout prevention portion and prevents pullout of the bearing, wherein the housing press-fit portion is press-fit into a fitting groove formed in the housing.

2. The bearing holding structure for a butterfly valve according to claim 1 , wherein
the sleeve has a screwed portion that protrudes outward at an end on a side opposite to the pullout prevention portion to be screwed to the housing.

3. The bearing holding structure for a butterfly valve according to claim 1 , wherein
the sleeve is formed of a stainless steel material or a ferrous material.

4. The bearing holding structure for a butterfly valve according to claim 1 , wherein
the pressing plate is formed of a stainless steel material or a ferrous material.

5. The bearing holding structure for a butterfly valve according to claim 1 , wherein
the sleeve and the pressing plate are fixed to each other by caulking or welding.

6. The bearing holding structure for a butterfly valve according to claim 1 , wherein
the sleeve and the bearing are fixed to each other by caulking or welding.

7. The bearing holding structure for a butterfly valve according to claim 1 , wherein
the bearing holding structure is used in an exhaust gas circulation valve installed in an exhaust gas circulation passage of a vehicle.

8. The bearing holding structure of claim 1 wherein said pressing plate is press fit into the inner peripheral surface of said sleeve to secure the bearing into the sleeve.

Assignees

• Mitsubishi Electric Corp

Inventors

• Ihana Naoki
• Hasegawa Satoru
• Takai Katsunori

Classifications

• F02D9/106

  Sealing of the valve shaft in the housing, e.g. details of the bearings · CPC title

• F16C2361/91

  Valves · CPC title

• F16K1/225 Primary

  the axis of rotation having only one bearing · CPC title

• F16C35/042

  Housings for rolling element bearings for rotary movement · CPC title

• F16C35/067

  Fixing them in a housing (with interposition of an element F16C35/07) · CPC title