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发明授权
CN100587284C 三脚等速联轴节及图像形成装置 有权

三脚等速联轴节及图像形成装置
摘要：
一种三脚等速联轴节，在外圈的内周上形成有在周方向上保持120°间隔的3条轨道槽。在组装于外圈的内侧的三脚部件上，设置有在外圈的各轨道槽内能够滑动且用于传递扭矩的突出部。将包括突出部的整个三脚部件由合成树脂的成形品构成，可不需要油脂润滑。另外，将与突出部的与轨道槽的侧面相对向的两侧形成为球面，在突出部的外圈轴方向上的前后设置平坦面，将该平坦面之间的长度设为比球面的球径小，从而实现三脚部件在轴方向上的长度的紧凑化。这种三脚等速联轴节，可以不需要油脂润滑，并且使用上受限制少。
摘要（英）：

A tripod type constant-velocity joint includes an outer ring formed with three axially extending track grooves circumferentially spaced apart from each other by 120 degrees. Each track groove has a pair of opposed, axially extending side faces. A tripod member is inserted in the outer ring. The tripod member includes three protrusions each slidably received in one of the track grooves and having apair of circumferentially curved side faces each opposing one of the pair of side faces of each track groove. Torque is thus transmitted between the outer ring and the tripod member. At least the protrusions of the tripod member are formed of a synthetic resin.

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