METHOD FOR DISPOSING ROCKER ARM ROLLING FRICTION BASED EXTENDABLE AND RETRACTABLE ROLLING STROKE SECTIONS IN PARALLEL EXCAVATOR OR LOADER HAVING ROCKER ARM ROLLING STROKE SECTIONS DISPOSED IN PARALLEL

摘要

A n excavator or loader having rocker arm rolling Mction-based extendable and retractable rolling stroke sections disposed in parallel, comprising a rocker arm (1), a machine body (2), and a work head (9); the rocker arm (1) comprises a front roller(3), a back roller (4), a :front roller race (5), a back roller race (6), a telescopic arm (7), a telescopic support arm (8) and the like; the front roller race (5) and the back roller race (6) are disposed in parallel; the :front roller (3) rolls in the front roller race (5), and the back roller (4) rolls in the back roller race (6); the front roller (3) and the back roller (4) coordinate through rolling :friction to support the telescopic arm (7) to extend and retract under the rolling friction on the telescopic support arm (8); the work head (9) is connected t o the telescopic arm (7); the telescopic arm (7) drives the work head (9) t o extend and retract; and the telescopic support arm (8) i s connected to the machine body (2). Also disclosed i s a method for disposing rocker arm rolling :friction-based stretchable and retractable rolling stroke sections in parallel.