Telescopic system e.g. for crane boom, has recognition device with measurement value receiver fitted to telescoping device in region of coupling unit

摘要

The telescopic system has several telescopic inner boxes (2a, 2b, 2c) operable by a telescoping device (5) with a coupling unit (8). A recognition device (10) has a measurement value receiver (10) in the region of the coupling unit. The receiver acts with sensors in the region of the rear bearing unit (3a, 3b, 3c) of the inner boxes.