This device, situated inside the gearbox, enables the output shaft to be rotated by
an external force (manual or mechanical) independently of the final wheel of the gearbox.
Description
A specially shaped cam (1) is directly fitted on the gearbox output shaft. The final wheel (2) of the gearbox pivots freely on this shaft and has a housing into which the cam fits (1).
Between the cam and final wheel two rollers are symmetrically located held in place under the pressure of two springs (4).
When the geared motor is energised, it causes the final wheel (2) to rotate which, via the two rollers (3), in turn drives the output shaft.
If, under external force, the output shaft is turned in the same direction as the final wheel but at a higher speed, the two rollers (3) release the final wheel and the shaft speed becomes
independent of the speed of the final wheel.
The rollers can be located according to whether the final wheel is rotating clockwise or anti-clockwise.
Can be used with gearboxes 81 021 0 and 81 033 0.
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected