Development of Compact Thermoplastic CVJ Boot

When a thermoplastic boot is installed on a constant velocity joint (CVJ) which is set at an angle, the centerline of the boot shows a particular curve like S-shape in its axial direction. This S-curve varies according to the designed shape of boot. By studying the correlationship between the S-curve and the boot performance, it is found that a particular design of boot enhances its durability, which allows further reduction of the size of boot.

This paper includes discussions on the correlation between the boot performance and the S-curve, and the durability test results of an ultra-small boot we have developed, together with the improvement of durability of polyester elastomer we have studied at the same time.