BUTTERFLY VALVE

摘要

A bearing holding structure 7 has a substantially cylindrical sleeve 71 and a plate-shaped pressing plate 77. A tubular portion 72 of the sleeve 71 includes a housing press-fit portion 73 having an outer peripheral surface to be press-fit into a recess 12 of an upper housing 11, and a bearing press-fit portion 74 having an inner peripheral surface to be press-fit thereinto by a bearing 6. A pullout prevention portion 75 that protrudes inward to prevent pullout of the bearing 6 is formed at one end of the tubular portion 72, and the pressing plate 77 is press-fit into the other end thereof.

主权项

1. A bearing holding structure for a 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 housing press-fit portion having an outer peripheral surface to be press-fit into the housing and a bearing press-fit portion having an inner peripheral surface to be press-fit thereinto by the bearing, and a pullout prevention portion that protrudes inward at one end of the tubular portion to prevent pullout of the bearing.