Equipment and method for greasing inner side of upper column tube of automobile steering system

The invention relates to the technical field of automobile part machining, in particular to an automobile steering system upper column tube inner side greasing device and a method thereof.The greasing device comprises a rack and a fixing base installed on the rack, a through opening is formed in the center of the fixing base, an upper column tube is inversely buckled at the through opening, and clamping blocks corresponding to upper column tube clamping openings are arranged on the two sides of the through opening; clamping blocks are slidably mounted on the two sides of the through opening and are in an arc shape. A greasing device is further arranged on the rack and comprises a lifting plate and a straight cylinder rotationally installed on the lifting plate, a rotating shaft of the straight cylinder and the axis of the through opening are located on the same straight line, filtering holes are formed in the circumferential side of the straight cylinder, the bottom of the straight cylinder is connected with