PURPOSE: To prevent seizure under high temperature by installing a belt engaging tension pulley on one end of a pulley arm used for adjusting the tension of a timing belt of an automobile engine, and forming a slide bearing for a fulcrum shaft by a condensed polycyclic polynuclear aromatic resin composition.
CONSTITUTION: In a belt tension adjusting device where a pulley arm 4 is rotatably installed on a fixed fulcrum shaft 1 through a collar 1 and a slide bearing 3, the slide bearing 3 is formed by a condensed polycyclic polynuclear aromatic resin composition. The condensed polycyclic polynuclear aromatic resin composition is prepared by adding 100-200wt. parts graphite and fluororesin to 100wt. parts condensed polycyclic polynuclear aromatic hydrocarbon rein having a basic structure where two or more condensed polycyclic aromatic compounds or a mixture of a condensed polycyclic aromatic compound and a monocyclic aromatic compound is combined by methylene bonding in such a manner that the weight ratio of graphite to fluororesin is 1 to 2.
IZUTSU TOMOYOSHI
KONOMOTO TAKEMI
| JPH02215854A | 1990-08-28 | |||
| JPS61108651A | 1986-05-27 | |||
| JPH04370419A | 1992-12-22 | |||
| JPH0632969A | 1994-02-08 | |||
| JPH04214970A | 1992-08-05 |