| 摘要 |
A device for machining the crank pins of a crankshaft which are radially offset from the crankshaft axis of rotation. A first master shaft having an axis of rotation and radially offset crank pins corresponding to the crank pins of the crankshaft is rotatably mounted in a housing. A substantially identical master shaft is rotatably mounted to one end of a cradle which has its other end pivotally mounted about the axis of the first master shaft and movable between a first and second position. A girt is rotatably mounted to each of corresponding crank pins on both master shafts so that, as the master shafts are rotatably driven in synchronism with each other and with the crankshaft, cyclical movement is imparted to each girt. A broach is attached to each girt adjacent the crankshaft so that, as the cradle is moved from its first to its second pivotal position, the broach moves tangentially with respect to the crankshaft crank pins and thereby machines the crank pins.
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