| 摘要 |
A spindle, comprised of a spindle body (68) and an indexing fixture (29), is configured to retain, and rotatingly drive, a crankshaft (10) relative to a grinding tool, so that each pin (16) on the crankshaft (10) is ground with a high degree of precision. A coupling mechanism (174), such as a pair of jaws (190, 192) with complementarily shaped teeth, is interposed between the spindle body (116) and the indexing fixture (29). Pressure is applied to one side of the coupling mechanism so that the jaws are normally engaged and the spindle body (116) and the indexing fixture (29) rotate as a unit. Motive power is supplied by a servomotor (98) secured to a primary drive shaft (100), which is joined to a secondary drive shaft (88), through an offset coupling (122), to define a motorized spindle.
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