| 摘要 |
PURPOSE: A timing chain driving system with vibration and noise reduction structure is provided to damp impact and vibration, and to reduce noise from the timing chain by movably connecting a sprocket to a camshaft with inserting a torsion spring. CONSTITUTION: A timing chain driving system has a camshaft(1), a timing chain and a sprocket(4). The sprocket is connected to the camshaft, and rotated by a torsion spring(7). A fixing disk(2) including a spring insertion groove is fastened in the camshaft by a key(3), and a spring fitting groove is formed in a protruded cylinder(5) projected in the rear part of the sprocket. Insertion protrusions(8) are bent from both ends of the torsion spring, and inserted to spring fitting and insertion grooves. Noise from vibration and noise is reduced by accumulating elastic restoring force with twisting the torsion spring.
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