| 摘要 |
A tripod constant velocity joint for reducing axial force and extending the life span is provided to prevent vibration and noise by decreasing axial force and restricting moment of a roller assembly, to improve durability by contacting a trunnion, and to cut down manufacturing cost by minimizing process of the trunnion. A tripod constant velocity joint(100) includes an outer race(110), a spider(120) inserted to the outer race, a spherical roller(130) and a needle bearing(140) for forming a roller assembly in the spider, and a guide ring(150). An outer flat surface(122a) is formed in an outer periphery of a trunnion(122) of the spider, and the spherical roller is rolled and slid between the outer flat surface and the outer race to transmit load from the outer race. An extension support part(132) is formed in a lower part of the spherical roller, and the needle bearing is contacted to an inner periphery of the spherical roller to transmit load from the spherical roller to the guide ring. A contact surface is formed in the inner periphery of the guide ring and contacted to the vertical surface of the needle bearing. A spring ring(160) is protruded horizontally to support the spherical roller, the needle bearing and the guide ring. The contact surface is curved according to vertical motion of the trunnion, and contacted to the outer flat surface of the trunnion.
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