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

The present invention relates to the field of excavation or loading, and in particular, to a method for arranging rolling-friction stretching and retraction based rolling stroke sections of a rocker arm in parallel. The invention also relates to an excavator or loader comprising a rocker arm having rolling stroke sections arranged in parallel. The excavator or loader comprises a rocker arm, a machine body, and a work head, wherein the rocker arm comprises a front roller, a rear roller, a front roller raceway, a rear roller raceway, a telescopic arm, a telescopic support arm, and the like; the front roller raceway and the rear roller raceway are arranged in parallel; the front roller rolls within the front roller raceway; the rear roller rolls within the rear roller raceway; the front roller coordinates with the rear roller to support the telescopic arm to perform the rolling-friction stretching and retraction on the telescopic support arm by means of rolling friction; the work head is connected with the telescopic arm which drives the work head to stretch or retract; and the telescopic support arm is connected with the machine body.