| 摘要 |
PURPOSE: A boot seal for a driving axle is provided to reduce the size of the boot seal by modifying the shape of the boot seal optimally, and to improve endurance in using for a long time by distributing stress. CONSTITUTION: Boot seals(10) of a driving axle is composed of bellows convolute parts(11) having plural lands and grooves, and reducing the diameter; large diameter parts(13) formed at the sides of convolute parts; and small diameter parts(15) formed at the sides of convolute parts. Convolute parts have bodies(11a) connecting lands and grooves. Stress is distributed in extending the entire length of grooves by increasing the thickness of the connection portion of the small diameter part and the convolute part. Endurance is improved with reducing the size of the boot seal with modifying the optimal structure.
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