SOIL-SHIFTING MACHINE WITH PNEUMATIC WHEELS Russian patent published in 2006 - IPC E02F9/00 

FIELD: mechanical engineering, particularly component parts of dredgers or soil-shifting machines with pneumatic wheels and hydraulic drives.

SUBSTANCE: soil-shifting machine comprises carriage, rotary platform with power unit, working equipment, hydraulic drive with controllable power pumps, as well as with hydraulic control means and hydraulic distribution means associated with working equipment. The soil-shifting machine also has power hydraulic lines and servo-control lines, as well as welding and pumping assemblies. Each pumping assembly comprises generator and self-priming pump with drives. Power take-off contour and control means are included in hydraulic drive. The power take-off contour comprises drive hydromotors for above generator and self-priming pump, two power distribution means. Each power distribution means is made as two-position dual-line slide and has hydraulic servo-control means. The control means comprises double-slide control unit with outlet channels, OR element and servo-control lines. The first hydraulic line of the first power distribution means is connected with pressure hydraulic line of one controllable power pumps. The second hydraulic line is linked to hydromotor of generator drive or self-priming pump through the second power distribution means. In the first position of the first power distribution means pressure hydraulic line of power pump is connected with hydraulic distribution means of working equipment. In the second position the pressure hydraulic line of power pump is linked to the second power distribution means, which in the first position is connected with generator drive hydromotor and in the second position is linked to self-priming pump drive hydromotor. Both hydraulic lines of outlet channels formed in double-slide control unit are attached to servo-control line of the first power distribution line and one to another by OR element. Besides, one hydraulic line of outlet channel is connected with servo-control line of the second power distribution means. Hydraulic line located between OR element and the first power distribution means is connected with servo-control line of controllable power pump.

EFFECT: extended functional capabilities, possibility to use the machine for sanitary service line repair.

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