Slewing gear drive for excavator plant co-rotatably joins first bearing to adjoining rotation cylinder as cylinder axial bearing with brake between first and second shaft bearing for compactness.

摘要

The pinion shaft (2) is co-rotatably fixed to the rotation cylinder (3) with a first shaft bearing (5) directly adjoining the cylinder to act as both axial bearing for the cylinder and at the same time carry the pinion shaft. A second bearing (7) indirectly adjoins the pinion itself (1), with the brake (8) arranged between the first and second shaft bearings (5,7). The pinion shaft is led axially through the cylinder which in turn has a fixer to locate the shaft and cylinder and also carries the first shaft bearing (5). The brake acts directly on the pinion shaft and the motor (4) is of the radial type, running at slow speed for high torque.