Device for lifting, lowering and leveling booms of strip mining

Details Device for lifting, lowering and leveling booms of strip mining Device for lifting, lowering and leveling booms of strip mining

1996-10-25

1999-04-06

Graysay, Tamara L.

Excavating

Rotary digger

Endless conveyor

37 91, 1983161, E02F 324

Patent

active

058903046

ABSTRACT:
A level boom is provided for a piece of strip mining equipment traveling on caterpillar-type chassis, which piece of equipment is temporarily moved on oblique roadways during operation. The position of the boom in relation to the skeletal structure is corrected with simple means. A piece of strip mining equipment with a boom, which can be lifted and lowered and at the free end of which, e.g., a bucket wheel for picking up a load is arranged, is connected to the substructure of the piece of equipment in a pivot axis. The lifting movement is brought about by a lifting cylinder. A tilting support, which carries the boom, is arranged in the pivot axis for lifting and lowering the boom. A bolt connection is provided on one side in the pivot axis for leveling between the tilting support and the boom, and the actuating element for leveling as well as a step bearing for absorbing lateral forces which the actuating element is unable to absorb, are located on the other side. Since the actuating element for lifting and lowering the boom is arranged in the pivot axis for leveling, no additional support elements are needed.

REFERENCES:
patent: 3645020 (1972-02-01), Belsin et al.
patent: 3744615 (1973-07-01), Plaquet et al.
patent: 4206840 (1980-06-01), Hanson
patent: 4542940 (1985-09-01), Marten
patent: 4871281 (1989-10-01), Justice
patent: 5247743 (1993-09-01), Holloway et al.

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