Abstract:
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.

Description:
TECHNICAL FIELD 
       [0001]    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 
       [0002]    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 
       [0003]    The invention aims to provide an online wheel run-out detecting device. 
         [0004]    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. 
         [0005]    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. 
         [0006]    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 sections  31  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; 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. 
         [0007]    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. 
         [0008]    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. 
         [0009]    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. 
         [0010]    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. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0011]      FIG. 1  is a structure diagram of an online wheel run-out detecting device provided by the invention. 
           [0012]      FIG. 2  is a structure diagram of an expanding core in an online wheel run-out detecting device provided by the invention. 
           [0013]      FIG. 3  is a structure diagram of an expanding core in an online wheel run-out detecting device provided by the invention. 
       
    
    
       [0014]    In the figures,  1 —frame,  2 —-chassis,  3 —lifting cylinder,  4 —support A,  5 —bearing base,  6 —linear bearing,  7 —mounting plate,  8 —guide shaft,  9 —lifting shaft,  10 —servo motor A,  11 —synchronous pulley A,  12 —connecting plate,  13 —synchronous belt,  14 —synchronous pulley B,  15 —base,  16 —connecting shaft A,  17 —servo motor B,  18 —shaft sleeve A,  19 —lower end cap,  20 —connecting shaft B,  21 —shaft sleeve B,  22 —oil cylinder,  23 —bearing A,  24 —end cap,  25 —gland,  26 —bearing B,  27 —chassis,  28 —flange plate,  29 —hinge pin,  30 —spring,  31 —expanding section,  32 —connecting shaft B,  33 —protector,  34 —expanding core,  35 —servo motor C,  36 —lead screw A,  37 —linear guide track A,  38 —sliding rack A,  39 —linear guide track B,  40 —lead screw B,  41 —servo motor D,  42 —sliding rack A,  43 —run-out detector,  44 —detecting roll, and  45 —support B. 
       DETAILED DESCRIPTION OF THE INVENTION 
       [0015]    Hereinafter, details and working conditions of a specific device provided by the invention will be described with reference to the drawings. 
         [0016]    The invention provides an online wheel run-out detecting device which comprises a frame  1 , a chassis  2 , a lifting cylinder  3 , supports A  4 , bearing bases  5 , linear bearings  6 , mounting plates  7 , guide shafts  8 , a lifting shaft  9 , a servo motor A 10 , a synchronous pulley All, a connecting plate  12 , a synchronous belt  13 , a synchronous pulley B 14 , a base  15 , a connecting shaft A 16 , a servo motor B 17 , a shaft sleeve A 18 , a lower end cap  19 , a connecting shaft B 20 , a shaft sleeve B 21 , an oil cylinder  22 , bearings A 23 , end caps  24 , a gland  25 , bearings B 26 , a chassis  27 , a flange plate  28 , hinge pins  29 , springs  30 , expanding sections  31 , a connecting shaft C 32 , a protector  33 , an expanding core  34 , a servo motor C 35 , a lead screw A 36 , a linear guide track A 37 , a sliding rack  38 , a linear guide track B 39 , a lead screw B 40 , a servo motor D 41 , a sliding rack B 42 , a run-out detector  43 , a detecting roll  44  and a support B 45 . The chassis  2  and the support B 45  are fixed on the frame, the mounting plates  7  are fixed on the chassis  2  by the supports A 4 , the bearing bases  5  are fixed on the mounting plates  7 , the lifting shaft  9  is mounted on the bearing bases  5  by the linear bearings  6 , two ends of the lifting shaft  9  are respectively connected with the connecting plate  12  and an output shaft of the lifting cylinder  3 , the servo motor A 10  and the base  15  are fixed on the connecting plate  12 , the shaft sleeve A 18  is mounted on the base  15  by the bearings A 23  and the end caps  24 , the synchronous pulley All is connected with an output shaft of the servo motor A 10 , the synchronous pulley B 14  is connected with the connecting shaft A 16 , and the synchronous belt  13  is respectively connected with the synchronous pulley All and the synchronous pulley B 14 . 
         [0017]    The lower end cap  19 , the gland  25  and the chassis  27  are fixed on the shaft sleeve A 18 , the servo motor B 17  is mounted on the lower end cap  19 , the shaft sleeve B 21  is mounted on the shaft sleeve A 18  by the two rows of bearings B 26  and the gland  25 , the oil cylinder  22  is fixed inside the shaft sleeve B 21 , an output end of the oil cylinder  22  is connected with the connecting shaft C 32 , the servo motor B 17  is connected with the shaft sleeve B 21  by the connecting shaft B 20 , the expanding core  34  is connected with the shaft sleeve B 21  by the connecting shaft C 32 , the expanding core  34 , the connecting shaft C 32  and the shaft sleeve B 21  are locked in the peripheral direction and do not rotate relatively, the connecting shaft C 32  and the shaft sleeve B 21  can relatively move in the axial direction, the flange plate  28  is fixed on the chassis  27 , eight T-shaped chutes which are distributed uniformly are formed in cavities of the flange plate  28  and the chassis  27 , bottom surfaces of the eight expanding sections  31  are in one-to-one correspondence to the eight T-shaped chutes respectively, the expanding sections  31  can smoothly slide in the chutes highly precisely, the inner side wall of each expanding section  31  is a 15-degree inclined plane, and two ends of each spring  30  are respectively connected with the flange plate  28  and the corresponding expanding section  31 ; and two groups of 15-degree inclined planes  34 - 1  and  34 - 2  which are uniformly distributed at intervals are arranged on side surfaces of the expanding core  34 , 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  34 - 3 , under the combined action of the tension of the oil cylinder  22  and the elasticity of the springs  30 , side walls of the expanding sections  31  are in contact with the conical surface  34 - 3  of the expanding core  34  when the expanding core  34  is located at the bottommost position, the servo motor B 17  drives the expanding core  34  to rotate at an angle of 22.5 degrees by the connecting shaft B 20 , the shaft sleeve B 21  and the connecting shaft C 32 , and the expanding sections  31  which are matched with the inclined planes can be switched between the inclined planes  34 - 1  and  35 - 2  of the expanding core  34 . The oil cylinder  22  drives the connecting shaft C 32  and the expanding core  34  to move in the up-down direction, the expanding sections  31  are matched with the inclined planes of the expanding core  34 , the eight expanding sections  31  synchronously 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 sections  31  is 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 core  34 , the servo motor B 17  drives the expanding core  34  to rotate at an angle of 22.5 degrees, the expanding sections  31  which are matched with the inclined planes can be switched between the inclined planes  34 - 1  and  34 - 2  of the expanding core  34 , the expanding and shrinking diameters of the expanding sections  31  are changed in two different ranges, and finally, large-stroke expanding and shrinking of the expanding sections  31  are realized. 
         [0018]    Corresponding pin holes are formed in the chassis  27  and the flange plate  28 , the positioning pins  29  are respectively connected with the pin holes of the chassis  27  and the flange plate  28 , and therefore, the assembly accuracy of the chassis  27  and the flange plate  28  is guaranteed. 
         [0019]    The servo motor C 35  and the linear guide track A 37  are fixed on the mounting rack  45 , the lead screw A 36  and the sliding rack A 38  are connected with the servo motor C 35 , and the servo motor C 35  can drive the sliding rack A 38  to move along the linear guide track A 37  in the up-down direction by the lead screw A 36 ; and the linear guide track B 39  and the servo motor D 41  are fixed on the sliding rack A 38 , the lead screw B 40  and the sliding rack B 42  are connected with the servo motor D 41 , the run-out detector  43  is mounted on the sliding rack B 42 , the detecting roll  44  is mounted on the run-out detector  43 , and the servo motor D 41  can drive the sliding rack B 42 , the run-out detector  43  and the sliding rack B 42  to horizontally move along the linear guide track B 39  in the left-right direction by the lead screw B 40 . 
         [0020]    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  3  drives a clamping mechanism to rise, a flange surface of the wheel is in contact with the flange plate  28 , and then the lifting cylinder  3  drives the wheel to be raised to a specified position. An oil cylinder rod of the oil cylinder  22  is in a shrinkage state, and under the effect of the springs  30 , the inclined planes of the expanding sections  31  are in contact with the upper conical surface of the expanding core  34 . According to the diameter of a center hole of the wheel, the servo motor A 10  drives the expanding core  34  to rotate at a specified angle, so that the inclined planes of the expanding sections  31  are matched with the corresponding inclined planes of the expanding core  34 , then the oil cylinder  22  begins to work, and overcomes the elasticity of the springs  30  to drive the connecting shaft C 32  and the expanding core  34  to move upwards, the expanding sections  31  are matched with the inclined planes of the expanding core  34 , and synchronously move outwards along the insides of the eight uniformly distributed T-shaped chutes formed in the cavities of the flange plate  28  and the chassis  27 , finally, the expanding sections  31  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 35  and the servo motor D 41  control the detecting roll  44  to move to a position of a bead seat of an outer rim of the wheel, then the servo motor A 10  begins to work and drives the wheel to rotate, the detecting roll  44  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  43  detects the run-out value of the wheel finally by analyzing the amount of movement of the detecting roll  44 . Hereto, the run-out detection work of the wheel is finished.