Online wheel run-out detecting device

An online wheel run-out detecting device, comprising:

• a frame, a chassis, a lifting cylinder, supports A, bearing bases, linear bearings, mounting plates, guide shafts, a lifting shaft, a servo motor A, a synchronous pulley A, a connecting plate, a synchronous belt, a synchronous pulley B, a base, a connecting shaft A, a servo motor B, a shaft sleeve A, a lower end cap, a connecting shaft B, a shaft sleeve B, an oil cylinder, bearings A, end caps, a gland, bearings B, a chassis, a flange plate, hinge pins, springs, expanding sections, a connecting shaft C, a protector, an expanding core, a servo motor C, a lead screw A, a linear guide track A, a sliding rack A, a linear guide track B, a lead screw B, a servo motor D, a sliding rack B, a run-out detector, a detecting roll and a support B;
• wherein the chassis and the support B are fixed on the frame, the mounting plates are fixed on the chassis by the supports A, the bearing bases are fixed on the mounting plates, the lifting shaft is mounted on the bearing bases by the linear bearings, two ends of the lifting shaft are respectively connected with the connecting plate and an output shaft of the lifting cylinder, the servo motor A and the base are fixed on the connecting plate, the shaft sleeve A is mounted on the base by the bearings A and the end caps, the synchronous pulley A is connected with an output shaft of the servo motor A, the synchronous pulley B is connected with the connecting shaft A, and the synchronous belt is respectively connected with the synchronous pulley A and the synchronous pulley B;
• the lower end cap, the gland and the chassis are fixed on the shaft sleeve A, the servo motor B is mounted on the lower end cap, the shaft sleeve B is mounted on the shaft sleeve A by the bearings B and the gland, the oil cylinder is fixed inside the shaft sleeve B, an output end of the oil cylinder is connected with the connecting shaft B, the servo motor B is connected with the shaft sleeve B by the connecting shaft B, the expanding core is connected with the shaft sleeve B by the connecting shaft C, the expanding core, the connecting shaft C and the shaft sleeve B are locked in the peripheral direction and do not rotate relatively, the connecting shaft C and the shaft sleeve B can relatively move in the axial direction, the flange plate is fixed on the chassis, eight T-shaped chutes which are distributed uniformly are formed in cavities of the flange plate and the chassis, bottom surfaces of the eight expanding sections are in one-to-one correspondence to the eight T-shaped chutes respectively, the expanding sections can smoothly slide in the chutes highly precisely, the inner side wall of each expanding section is a 15-degree inclined plane, and two ends of each spring are respectively connected with the flange plate and the corresponding expanding section ;
• two groups of 15-degree inclined planes and which are uniformly distributed at intervals are arranged on side surfaces of the expanding core, the number of the inclined planes in each group is eight, height difference exists between each two inclined planes, side walls of upper ends of the two groups of inclined planes are joined at a conical surface, under the combined action of the tension of the oil cylinder and the elasticity of the springs, side walls of the expanding sections are in contact with the conical surface of the expanding core when the expanding core is located at the bottommost position, the servo motor B drives the expanding core to rotate at an angle of 22.5 degrees by the connecting shaft B, the shaft sleeve B and the connecting shaft C, and the expanding sections which are matched with the inclined planes can be switched between the inclined planes and the inclined planes of the expanding core;
• and the oil cylinder drives the connecting shaft C and the expanding core to move in the up-down direction, the expanding sections are matched with the inclined planes of the expanding core, and therefore, the eight expanding sections perform centripetal motion and centrifugal motion synchronously along the insides of the eight T-shaped chutes which are distributed uniformly;
• and
• the servo motor C and the linear guide track A are fixed on the mounting rack, the lead screw A and the sliding rack A are connected with the servo motor C, and the servo motor C can drive the sliding rack A to move along the linear guide track A in the up-down direction by the lead screw A;
• and the linear guide track B and the servo motor D are fixed on the sliding rack A, the lead screw B and the sliding rack B are connected with the servo motor D, the run-out detector is mounted on the sliding rack B, the detecting roll is mounted on the run-out detector, and the servo motor D can drive the sliding rack B, the run-out detector and the sliding rack B to horizontally move in the left-right direction along the linear guide track B by the lead screw B.