HYDRAULIC DRIVE FOR MOBILE ANTENNA INSTALLATION WITH LIFTING MAST Russian patent published in 2006 - IPC B66F11/04 H01Q1/32 

FIELD: mechanical engineering; lifting equipment.

SUBSTANCE: invention relates to lifting equipment, particularly, to hydraulic drive for lifting antenna installation mast. Proposed hydraulic drive has control system, hydraulic jacks and pumping unit with tank mounted on chassis of vehicle. Hydraulic drive contains three-position hydraulic distributors. Each hydraulic jack is hydraulically coupled with pumping unit through corresponding first and second three-position hydraulic distributors. Pressure main line connecting pumping unit with hydraulic jack can communicate with piston space of hydraulic jack through first three-position hydraulic distributor in one of its positions and first flow governor is installed in corresponding main line by means of four locking check valves. The latter are installed to provide permanent direction of liquid flow through first flow governor irrespective of direction of movement of rod of hydraulic jack. Pressure main line connecting pumping unit and hydraulic jack can communicate with piston space of hydraulic jack also through second three-position hydraulic distributor in one of its positions and through restrictor. Said main pressure line can communicate with rod space of hydraulic jack through first and second hydraulic distributors, respectively, in other position of said hydraulic distributor respectively, in other position of said hydraulic distributors. Pressure indicator introduced additionally into system is connected to main line communicating piston space of hydraulic jack with first flow governor and restrictor, respectively, said pressure indicator being electrically connected with control system. First and second three-position hydraulic distributors and pumping unit are electrically connected with leveling transmitters installed on chassis of vehicle. Hydraulic drive is furnished with at least one slewing hydraulic cylinder of turntable which is hinge-connected, respectively, with turntable and upper section of main line. Said slewing hydraulic cylinder contains double-acting pilot-controlled check valve and is connected with pumping unit through third and fourth three-position hydraulic distributors. Pressure main line connecting pumping unit with slewing hydraulic cylinder can communicate with piston space of slewing hydraulic cylinder through third three-position hydraulic distributor in one of its positions, second flow governor and adjustable restrictor mechanically coupled with gravitational pendulum. Second flow governor is installed in corresponding main line through four other lock check valves. The latter are installed to provide permanent direction of liquid through second flow governor irrespective of direction of rod travel in slewing hydraulic cylinder. Pressure main line connecting pumping unit with slewing hydraulic cylinder can communicate with rod space of slewing hydraulic cylinder in other position of third three-position hydraulic distributor and it can communicate with piston space of slewing hydraulic cylinder through fourth three-position hydraulic distributor in one of its positions and adjustable restrictor mentioned above, and it can communicate with rod space of slewing hydraulic cylinder through three-position hydraulic distributor in its other position. Hydraulic drive is furnished wit at least one two-rod hydraulic cylinder. Housing of said cylinder is hinge-mounted on turntable, one rod is hinge-connected on intermediate platform which is hinge-connected to turntable for turning relative to axle intersecting at right angle with turning axle of turntable, and other rod is connected with double-acting zero setter which is mounted on housing of two-rod hydraulic cylinder.

EFFECT: enlarged functional capabilities of hydraulic drive of mobile antenna installation with lifting mast, provision of quick automatic setting up and closing down of antenna installation at redeployment, provision of higher accuracy of its guidance.

3 cl, 10 dwg