The prime motor rotates in a fixed direction and the alternating motion of the carrierbar is accomplished by the crank-rocker mechanism.
电动机单向旋转，用曲柄摇杆机构换向，实现悬点的往复直线运动。
2
At least one blade Angle bearing of a pair of such bearings permits an axial movement of the respective tension or carrierbar, whereby the latter is able to take up bending loads.