Online wheel run-out detecting device

The invention relates to an online wheel run-out detecting device. The online wheel run-out detecting device includes a frame, a chassis, a lifting cylinder, supports, bearing bases, linear bearings, mounting plates, guide shafts, a lifting shaft, a servo motor, a synchronous pulley, a connecting plate, a synchronous belt, a synchronous pulley, a base, a connecting shaft, a servo motor, a shaft sleeve, a lower end cap, a connecting shaft, a shaft sleeve, and an oil cylinder. The online wheel run-out detecting device can meet requirements of online wheel run-out detection, meanwhile it has the characteristics of simple structure, convenience in manufacturing, stable performance and capability of meeting machining requirements on precision, and can meet requirements of automatic production.

TECHNICAL FIELD

The invention relates to a machining device, in particular to an online wheel bead seat run-out detecting device in a wheel machining process.

BACKGROUND ART

During machining of wheels of automobiles, run-out of the wheels is an important factor which affects the service lives and safety of the wheels, and therefore, run-out of the wheels is required to be detected completely. Hub manufacturers always detect the run-out of the wheels by using semi-automatic run-out detecting equipment manually, but the detecting mode has the problems of low efficiency, high labor cost, poor universality and the like. The invention provides an online wheel run-out detecting device.

SUMMARY OF THE INVENTION

The invention aims to provide an online wheel run-out detecting device.

In order to achieve the above object, the technical scheme of the invention is as follows: an online wheel run-out detecting device mainly comprises 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, another 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 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.

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 two rows of 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 C, 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 sections31are 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; and two groups of 15-degree inclined planes 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 two groups of inclined planes, which are uniformly distributed at intervals, of the expanding core. 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, so that the eight expanding sections synchronously perform centripetal motion and centrifugal motion along the T-shaped chutes which are distributed uniformly, and a high-precision synchronous expanding and shrinking function of the eight expanding sections is fulfilled; and because height difference exists between the two groups of inclined planes, which are distributed uniformly at intervals, of the side surfaces of the expanding core, the servo motor B drives the expanding core to rotate at an angle of 22.5 degrees, the expanding sections which are matched with the inclined planes can be switched between the two groups of inclined planes, which are uniformly distributed at intervals, of the expanding core, the expanding and shrinking diameters of the expanding sections are changed in two different ranges, and finally, large-stroke expanding and shrinking of the expanding sections are realized.

Corresponding pin holes are formed in the chassis and the flange plate, the positioning pins are respectively connected with the pin holes of the chassis and the flange plate, and therefore, assembly accuracy of the chassis and the flange plate is guaranteed.

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 along the liner guide track B in the left-right direction by the lead screw B.

During actual use, a wheel is conveyed to the working position of the device through a roll table, compressed air is fed, the lifting cylinder drives a clamping mechanism to rise, a flange surface of the wheel is in contact with the flange plate, and then the lifting cylinder drives the wheel to be raised to a specified position. An oil cylinder rod of the oil cylinder is in a shrinkage state, and under the effect of the springs, the inclined planes of the expanding sections are in contact with the upper conical surface of the expanding core. According to the diameter of a center hole of the wheel, the servo motor A drives the expanding core to rotate at a specified angle, so that the inclined planes of the expanding sections are matched with the corresponding inclined planes of the expanding core, then the oil cylinder begins to work, and overcomes the elasticity of the springs to drive the connecting shaft B and the expanding core to move upwards, the expanding sections are matched with the inclined planes of the expanding core, and synchronously move outwards along the insides of the eight uniformly distributed T-shaped chutes formed in the cavities of the flange plate and the chassis, finally, the expanding sections are in contact with the center hole of the wheel, and the positioning and tensioning process of the wheel is finished. According to various dimension parameters of the machined wheel, the servo motor C and the servo motor D control the detecting roll to move to a position of a bead seat of an outer rim of the wheel, then the servo motor A begins to work and drives the wheel to rotate, the detecting roll is in contact with various positions in the peripheral direction of the bead seat of the outer rim of the wheel, and the run-out detector detects the run-out value of the wheel finally by analyzing the amount of movement of the detecting roll. Hereto, the run-out detection work of the wheel is finished.

The online wheel run-out detecting device can meet requirements of run-out detection of the wheel, meanwhile has the characteristics of simple structure, convenience in manufacturing, stable performance, and capability of meeting machining requirements on precision, and can meet requirements of automatic production.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, details and working conditions of a specific device provided by the invention will be described with reference to the drawings.

The invention provides an online wheel run-out detecting device which comprises a frame1, a chassis2, a lifting cylinder3, supports A4, bearing bases5, linear bearings6, mounting plates7, guide shafts8, a lifting shaft9, a servo motor A10, a synchronous pulley A11, a connecting plate12, a synchronous belt13, a synchronous pulley B14, a base15, a connecting shaft A16, a servo motor B17, a shaft sleeve A18, a lower end cap19, a connecting shaft B20, a shaft sleeve B21, an oil cylinder22, bearings A23, end caps24, a gland25, bearings B26, a chassis27, a flange plate28, hinge pins29, springs30, expanding sections31, a connecting shaft C32, a protector33, an expanding core34, a servo motor C35, a lead screw A36, a linear guide track A37, a sliding rack38, a linear guide track B39, a lead screw B40, a servo motor D41, a sliding rack B42, a run-out detector43, a detecting roll44and a support B45. The chassis2and the support B45are fixed on the frame, the mounting plates7are fixed on the chassis2by the supports A4, the bearing bases5are fixed on the mounting plates7, the lifting shaft9is mounted on the bearing bases5by the linear bearings6, two ends of the lifting shaft9are respectively connected with the connecting plate12and an output shaft of the lifting cylinder3, the servo motor A10and the base15are fixed on the connecting plate12, the shaft sleeve A18is mounted on the base15by the bearings A23and the end caps24, the synchronous pulley A11is connected with an output shaft of the servo motor A10, the synchronous pulley B14is connected with the connecting shaft A16, and the synchronous belt13is respectively connected with the synchronous pulley A11and the synchronous pulley B14.

The lower end cap19, the gland25and the chassis27are fixed on the shaft sleeve A18, the servo motor B17is mounted on the lower end cap19, the shaft sleeve B21is mounted on the shaft sleeve A18by the two rows of bearings B26and the gland25, the oil cylinder22is fixed inside the shaft sleeve B21, an output end of the oil cylinder22is connected with the connecting shaft C32, the servo motor B17is connected with the shaft sleeve B21by the connecting shaft B20, the expanding core34is connected with the shaft sleeve B21by the connecting shaft C32, the expanding core34, the connecting shaft C32and the shaft sleeve B21are locked in the peripheral direction and do not rotate relatively, the connecting shaft C32and the shaft sleeve B21can relatively move in the axial direction, the flange plate28is fixed on the chassis27, eight T-shaped chutes which are distributed uniformly are formed in cavities of the flange plate28and the chassis27, bottom surfaces of the eight expanding sections31are in one-to-one correspondence to the eight T-shaped chutes respectively, the expanding sections31can smoothly slide in the chutes highly precisely, the inner side wall of each expanding section31is a 15-degree inclined plane, and two ends of each spring30are respectively connected with the flange plate28and the corresponding expanding section31; and two groups of 15-degree inclined planes34-1and34-2which are uniformly distributed at intervals are arranged on side surfaces of the expanding core34, 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 surface34-3, under the combined action of the tension of the oil cylinder22and the elasticity of the springs30, side walls of the expanding sections31are in contact with the conical surface34-3of the expanding core34when the expanding core34is located at the bottommost position, the servo motor B17drives the expanding core34to rotate at an angle of 22.5 degrees by the connecting shaft B20, the shaft sleeve B21and the connecting shaft C32, and the expanding sections31which are matched with the inclined planes can be switched between the inclined planes34-1and35-2of the expanding core34. The oil cylinder22drives the connecting shaft C32and the expanding core34to move in the up-down direction, the expanding sections31are matched with the inclined planes of the expanding core34, the eight expanding sections31synchronously perform centripetal motion and centrifugal motion along the insides of the eight uniformly distributed T-shaped chutes, and a high-precision synchronous expanding and shrinking function of the eight expanding sections31is fulfilled; and because height difference exists between the two groups of inclined planes, which are uniformly distributed at intervals, of side surfaces of the expanding core34, the servo motor B17drives the expanding core34to rotate at an angle of 22.5 degrees, the expanding sections31which are matched with the inclined planes can be switched between the inclined planes34-1and34-2of the expanding core34, the expanding and shrinking diameters of the expanding sections31are changed in two different ranges, and finally, large-stroke expanding and shrinking of the expanding sections31are realized.

Corresponding pin holes are formed in the chassis27and the flange plate28, the positioning pins29are respectively connected with the pin holes of the chassis27and the flange plate28, and therefore, the assembly accuracy of the chassis27and the flange plate28is guaranteed.

The servo motor C35and the linear guide track A37are fixed on the mounting rack45, the lead screw A36and the sliding rack A38are connected with the servo motor C35, and the servo motor C35can drive the sliding rack A38to move along the linear guide track A37in the up-down direction by the lead screw A36; and the linear guide track B39and the servo motor D41are fixed on the sliding rack A38, the lead screw B40and the sliding rack B42are connected with the servo motor D41, the run-out detector43is mounted on the sliding rack B42, the detecting roll44is mounted on the run-out detector43, and the servo motor D41can drive the sliding rack B42, the run-out detector43and the sliding rack B42to horizontally move along the linear guide track B39in the left-right direction by the lead screw B40.

During actual use, a wheel is conveyed to the working position of the device through a roll table, compressed air is fed, the lifting cylinder3drives a clamping mechanism to rise, a flange surface of the wheel is in contact with the flange plate28, and then the lifting cylinder3drives the wheel to be raised to a specified position. An oil cylinder rod of the oil cylinder22is in a shrinkage state, and under the effect of the springs30, the inclined planes of the expanding sections31are in contact with the upper conical surface of the expanding core34. According to the diameter of a center hole of the wheel, the servo motor A10drives the expanding core34to rotate at a specified angle, so that the inclined planes of the expanding sections31are matched with the corresponding inclined planes of the expanding core34, then the oil cylinder22begins to work, and overcomes the elasticity of the springs30to drive the connecting shaft C32and the expanding core34to move upwards, the expanding sections31are matched with the inclined planes of the expanding core34, and synchronously move outwards along the insides of the eight uniformly distributed T-shaped chutes formed in the cavities of the flange plate28and the chassis27, finally, the expanding sections31are in contact with the center hole of the wheel, and the positioning and tensioning process of the wheel is finished. According to various dimension parameters of the machined wheel, the servo motor C35and the servo motor D41control the detecting roll44to move to a position of a bead seat of an outer rim of the wheel, then the servo motor A10begins to work and drives the wheel to rotate, the detecting roll44is in contact with various positions in the peripheral direction of the bead seat of the outer rim of the wheel, and the run-out detector43detects the run-out value of the wheel finally by analyzing the amount of movement of the detecting roll44. Hereto, the run-out detection work of the wheel is finished.