| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress a clearance (rattling) produced between the cam parts of a cam follower and a cam member in a movement converting mechanism. <P>SOLUTION: A rotating shaft 13 is rotatably supported about an axis Lo through a bearing in an unrotatable cylindrical member 11. A piston 15 is assembled integrally with the rotating shaft 13 so as to be rotated and reciprocatingly moved in the axial direction. A movement converting mechanism capable of converting the rotating motion of the rotating shaft 13 into the reciprocating motion of the piston 15 comprises a cam member 21 having a cam part 21a formed on the cylindrical member 11, disposed coaxially with the rotating shaft 13, formed in an annular shape, and variable in the axial direction, a cam follower 23 installed on the piston 15, engaged with the cam part 21a at the radial end part thereof crossing perpendicularly to the axis Lo, and rotated relative to the cam member 21 to move in the axial direction, an axial elongated hole 13a formed in the rotating shaft 13 and guiding the cam follower 23 so as to be rotated and reciprocatingly axially moved integrally with the rotating shaft 13, and a spring 31 pressing the cam follower 23 in the direction of the cam part 21a. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
