ASSISTANT ARM FOR AUTOMOBILE TIRE CHANGER AND METHOD FOR MANUFACTURING PRINCIPAL PARTS OF THE ASSISTANT ARM

摘要

The present disclosure provides an assistant arm for an automobile tire changer and a method for manufacturing principal parts of the assistant arm. The assistant arm is of a one-for-two structure. A longitudinal actuator is connected to a sliding body, with an upper tire pressing mechanism hinged to the upper end and a lower tire pressing mechanism hinged to the lower end. A guide rail plate is arranged on a vertical column to form a combined guide rail. The guide rail plate is made of 45# bar-like steel plate, and has a straightness and a flatness of less than or equal to 0.05mm/m. The vertical column includes a square steel tube as an anti-buckling beam, and several protrusions are welded onto upper and lower portions and a lateral surface of the vertical column to serve as a mounting reference surface with a flatness of less than or equal to 0.1mm/m. An upper stopper, a lower stopper, a first lateral rib and a second lateral rib are welded to the sliding body within which a slider is arranged. The sliding body is connected to a piston rod of the longitudinal actuator by means of a thrust joint bearing. A lower end of the longitudinal actuator is hinged to a bottom of the vertical column through a lug shaft. Upper and lower laterally-swinging guide sleeve are each provided with a claw wrench. A console consists of a handle, a front plate welding assembly, a rear cover plate welding assembly, a tapered gasket and a sunk screw. The combined guide rail, the sliding body and the console, after being subjected to rough and fine machining, are combined together so as to form the assistant arm.