| 摘要 |
An automatic tool changer can reduce a space required for an output shaft and thus permits downsizing of the whole device. Also, the automatic tool changer can reduce an inertia force in reciprocal linear motion to perform high speed operation. The automatic tool changer has a motion converting cam which converts a rotational motion of a lifting rotary shaft into a linear motion. A cam follower of an arm supporting member is engaged with the motion converting cam. When relative rotational swing motion is caused between the lifting rotary shaft and a pivoting rotary shaft, the cam follower causes reciprocal linear motion relative to the motion converting cam. Then, the arm supporting member which is movable in an axial direction relative to the pivoting rotary shaft through a spline coupling, causes reciprocal linear motion on a tool holding arm. Upon synchronous rotation of the lifting rotary shaft and the pivoting rotary shaft, relative displacement between the motion converting cam and the cam follower is not caused so that the arm supporting member and the tool holding arm are pivoted with the pivoting rotary shaft. |
