FITTING STRUCTURE OF CYLINDRICAL MEMBER

摘要

A recess is formed in an outer circumferential surface of a first fitting cylinder. A flange and a second fitting cylinder are provided at one end of a second cylindrical member which is part of a dust cover. A sealing member is attached to the flange. A protruding portion is provided on an inner circumferential surface of the second fitting cylinder. The sealing member is strongly pressed by the first fitting cylinder and the flange in the state where the first fitting cylinder is fitted into the second fitting cylinder, and where the recess and the protruding portion are fitted to each other. Due to this structure, up-and-down movement of the both fitting cylinders is limited, and the sealing member is strongly pressed, thereby maintaining sealing.

主权项

1. A fitting structure of cylindrical members, comprising:
a first cylindrical member (21) having a first fitting cylinder (25) at one end thereof; a second cylindrical member (31, 73, 97, 119) having, at one end thereof, an annular flange (39, 81, 107, 129) which protrudes in a direction intersecting a cylinder's center line, and a second fitting cylinder (41, 77, 101, 123) which projects from an entire protrusion end of the flange (39, 81, 107, 129) in a direction of the cylinder's center line and into which the first fitting cylinder (25) is fitted; and a sealing member (55, 63, 75, 99, 121) accommodated in the second fitting cylinder (41, 77, 101, 123) and placed on the flange (39, 81, 107, 129), the sealing member (55, 63, 75, 99, 121) being strongly pressed by an end of the first fitting cylinder (25) and the flange (39, 81, 107, 129) in a state where the first fitting cylinder (25) is fitted in the second fitting cylinder (41, 77, 101, 123), wherein at least two engaging portions (43, 79, 103, 125) are formed on one of the first fitting cylinder (25) or the second fitting cylinder (41, 77, 101, 123), and an engaged portion (27) with which the engaging portions (43, 79, 103, 125) engage is formed in the other, and each of the engaging portions (43, 79, 103, 125) engages with the engaged portion (27) in the state where the first fitting cylinder (25) is fitted in the second fitting cylinder (41, 77, 101, 123), thereby limiting movement of the first fitting cylinder (25) and the second fitting cylinder (41, 77, 101, 123) in the direction of the cylinder's center line, and maintaining the state where the sealing member (55, 63, 75, 99, 121) is strongly pressed by the end of the first fitting cylinder (25) and the flange (39, 81, 107, 129).