Method for arranging rolling-friction stretching and retraction based rolling stroke sections of a rocker arm in parallel, and an excavator or loader comprising a rocker arm having rolling stroke sections arranged in parallel

A method for arranging rolling-friction stretching and retraction based rolling stroke sections of a rocker arm in parallel, which is implemented by the following steps:

• step 1:
• providing a front roller, a rear roller, a front roller raceway, a rear roller raceway, a telescopic arm, and a telescopic support arm;
• disposing the front roller raceway on the telescopic arm or the telescopic support arm;
• disposing the rear roller raceway on the telescopic support arm or the telescopic arm or the machine body;
• disposing the front roller on the telescopic support arm or the telescopic arm;
• disposing the rear roller on the telescopic arm or the telescopic support arm;
• arranging the front roller raceway and the rear roller raceway in parallel;
• rolling the front roller within the front roller raceway;
• rolling the rear roller within the rear roller raceway;
• and coordinating the front roller with the rear roller to support the telescopic arm to perform rolling-friction stretching and retraction on the telescopic support arm by means of rolling friction;
• step 2:
• providing a work head, and connecting the work head with the telescopic arm so that the telescopic arm drives the work head to stretch and retract;
• and
• step 3:
• connecting the telescopic support arm with a machine body, and providing a traveling gear on the lower part of the machine body so that the traveling gear drives the machine body to travel.