| 摘要 |
A universal joint includes a pair of yoke members each having a pair of spaced arms. A coupler is pivotably coupled with the arms of the yoke members, allowing the yoke members to respectively pivot about two pivot axes perpendicular to each other. The coupler includes opposite first and second faces slideably abutting with inner faces of the arms of one of the yoke members, opposite third and fourth faces slideably abutting with inner faces of the arms of the other yoke member, and opposite filth and sixth faces. A length of each of the first, second, third, and fourth faces between the fifth and sixth faces is larger than 0.6 times a width between the first and second faces and smaller than a distance from one of the two pivot axes to an intermediate face between the inner faces of the arms of one of the yoke members.
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