| 摘要 |
<p>PURPOSE:To smoothly carry out an expanding operation and to improve durability by providing a bellows guide comprising a base part fitted into the root part of bellows, a radial protruding part and a part slidingly coming into contact with a housing in an axial direction and housing a welding and connect part. CONSTITUTION:Two bellows elements 15 are connected by a welding and connect part 17 throughout all the circumference of a circle to form a bellows 13 and a bellows guide 35 is provided in an air chamber side located between the bellows 13 and a housing 11. This bellows guide 35 is made of synthetic resin and comprises a base part 40 fitted into the root part 37 of the bellows element 15, a first part 45 circumferentially and radially protruding therearound and a second part 46 capable of sliding in the housing in an axial direction therefrom and place the bead 18 of the welding and connect part 17 at the inside thereof. Accordingly, the expanding operation of the bellows 13 can be smoothly executed, resistance by fluid in the housing 11 be reduced and durability be improved.</p> |
