| 摘要 |
A tripod constant velocity universal joint (12) including an outer housing (14) having three linear tracks (28A, 28B, 28C), a spider (42) having three cylindrical trunnions (48A, 48B, 48C) in the linear tracks and a splined bore (40) for an end (38) of an axle bar (10), three drive rollers (56A, 56B, 56C) in the three linear tracks, each having a cylindrical bore (60) around a corresponding one of the three trunnions, and a complement of needle roller bearings (64) between each of the trunnions and the cylindrical bore of the corresponding drive roller. Uniform structural robustness of the elements of the joint is reflected in the magnitudes of three dimensional relationships of the tripod joint, i.e. a trunnion aspect ratio "Rt" (the ratio of the length of the trunnion to the diameter of the trunnion), a drive roller aspect "Rb" (the ratio of the height of the drive roller to the diameter of the drive roller), and a spider diameter ratio "Rs" (the ratio of the roller circle diameter of the tripod joint to the axle bar diameter). In the tripod joint according to this invention the trunnion aspect ratio Rt is in a range less than 0.69, the drive roller aspect Rb is in a range less than 0.3, and the spider diameter ratio Rs is less than 1.9.
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