Patent Publication Number: US-11648637-B2

Title: Wheel weight-reducing pit cleaning device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims the priority of Chinese patent application No. 201811313316.0, filed on Nov. 6, 2018, which is hereby incorporated by reference in its entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to a cleaning device, and more particularly to a wheel weight-reducing pit cleaning device. 
     BACKGROUND 
     As the weight of the wheels directly affects the fuel economy of the vehicle, the vehicle industry continues to pursue lightweight, especially in the wheel industry. For the wheel formed by casting process, the weight-reducing pits are often arranged on the wheel flange. With the processing of the wheel flange, the edge of the weight-reducing pit will generate a lot of burrs. If the burrs are not removed in time, the wheel will cause corrosion failure in the use process. Therefore, an automatic cleaning device is needed to remove the burrs on the edge of the weight-reducing pit on the wheel flange. 
     SUMMARY 
     It is an object of the present disclosure to provide a weight-reducing pit cleaning device which, in use, is capable of cleaning and removing the burrs on the edges of the drain groove and the weight loss groove at the wheel weight-reducing pit. 
     In order to achieve the above object, the technical solution of the present disclosure is as follows: weight-reducing pit cleaning device, is comprised a frame, a first lower guiding post, a first lower cylinder, a first lower guiding sleeve, a first lower fixing plate, a rotary joint, a spline shaft, a first pulley, a first lower servo motor, a second pulley, a first synchronous belt, a third pulley, a first lower lifting plate, a support frame, a spline sleeve, a hollow shaft, a first bearing pedestal, a ball bowl, a guard plate, a center brush, a second lower servo motor, a second lower lifting plate, a first lower guiding rail, a first lower gear, a first lower rack, a left vertical plate, a third lower servo motor, a second lower gear, a second lower rack, a second lower guiding rail, a first sliding plate, a side brush, a first shaft, a first spring, a second shaft, a second bearing pedestal, a fourth lower servo motor, a lower overturning plate, a fifth lower servo motor, a third shaft, a third bearing pedestal, a second lower guiding post, a second lower guiding sleeve, a second lower fixing plate, a third lower lifting plate, a third lower gear, a third lower rack, a third lower guiding rail, a second sliding plate, a sixth lower servo motor, a third lower fixing plate, a second synchronous belt, a fourth pulley, a swivel, a right vertical plate, a fourth shaft, a fourth lower gear, a second spring, a first ring brush, a fifth lower gear, a second ring brush, a third spring, a fifth shaft, a third ring brush, a fourth spring, a sixth shaft, a fifth pulley, a fourth lower fixing plate, a sixth lower gear, a sixth lower ring gear, a seventh lower servo motor, an eighth lower servo motor, servo electric cylinder, a first upper cylinder, an upper fixing plate, an upper rack, an upper guiding rail, a left sliding plate, left bearing pedestals, left shafts, V-shaped rollers, a pressure head, a cross hinge, an upper shaft, an upper bearing pedestal, an upper lifting plate, upper guiding post, upper guiding sleeve, a second upper cylinder, an upper gear, right shafts, right bearing pedestals, a right sliding plate, an upper servo motor, a third synchronous belt, a sixth pulley, a ninth lower servo motor and a second lower cylinder, is characterize d in that: 
     a lower lifting driving system comprises: the first lower guiding sleeve are fixed below the first lower fixing plate; the first lower guiding post matching with the first lower guiding sleeve are fixed below the first lower lifting plate; the second lower cylinder are also fixed on the first fixing plate, and the output end thereof is hinged to the lower part of the first lower lifting plate; the first bearing pedestal is fixed above the first lower lifting plate; the hollow shaft is mounted inside the first bearing pedestal through a bearing; the spline sleeve is mounted inside the hollow shaft through a bearing; the spline shaft is matched with the spline sleeve; the second pulley is fixed below the hollow shaft; the guard plate is mounted on the top end of the hollow shaft through the ball bowl; the material of the portion of the guard plate corresponding to the position of the wheel weight-reducing pit is removed, and the machining part of the wheel flange surface is protected; the first lower servo motor is fixed on the left side below the first lower lifting plate through a transition flange, and the output end thereof is fixed with the third pulley; the second pulley and the third pulley are connected by the first synchronous belt; the first pulley is fixed below the spline sleeve; the ninth lower servo motor is fixed on the right side below the first lower lifting plate through a transition flange, and the output end thereof is fixed with the sixth pulley; the pulley and the sixth pulley are connected by the third synchronous belt; the support frame is fixed at the middle position below the first lower lifting plate; the first lower cylinder is fixed below the support frame, and the output end thereof is connected with the lower end of the rotary joint; the upper end of the rotary joint is connected with the lower end of the spline shaft; and the center brush is fixed on the top end of the spline shaft; 
     a side brush system comprises: the left vertical plate is fixed on the left side below the guard plate; the second lower lifting plate is mounted on the right side of the left vertical plate through the lower guiding rail; the first lower rack is also fixed on the right side of the left vertical plate; the third lower servo motor is fixed above the right side of the second lower lifting plate, and the output end thereof is fixed with the first lower gear; the first lower gear is meshed with the first lower rack; the third bearing pedestal is fixed below the right side of the second lower lifting plate; the third shaft is mounted inside the third bearing pedestal through a bearing; the second lower servo motor is fixed below the left side of the second lower lifting plate, the output end thereof is connected with the left side of the third shaft; the lower overturning plate is fixed on the right side of the third shaft; the first sliding plate is fixed is mounted above the lower overturning plate through the second lower guiding rail the second lower rack is fixed on the left side of the first sliding plate; the fifth lower servo motor is fixed below the lower overturning plate, and the output end thereof is fixed with the second lower end gear; the second lower gear is meshed with the second lower rack; the bearing pedestal is fixed above the first sliding plate; the second shaft is mounted inside the second bearing pedestal through a bearing; the outer side of the first shaft is matched with the inner hole of the second shaft; the spring is mounted in the inner hole above the second shaft, and is placed on the lower end of the first shaft; the side brush is fixed on the top end of the first shaft; and the fourth lower servo motor is fixed below the first sliding plate, and the output end is connected with the lower end of the second shaft; 
     a ring brush unit comprises: the fourth shaft is mounted on the fourth lower fixing plate through a bearing; the fourth lower gear is fixed on the outer side above the fourth shaft; the first ring brush is mounted in the hole at the upper end of the fourth shaft; the second spring is mounted in the inner hole above the fourth shaft, and is placed on the lower end of the first ring brush; the shaft is mounted on the fourth lower fixing plate through the bearing, and is placed on the fourth right side of the fourth shaft; the fifth lower gear is fixed on the outer side above the fifth shaft; 
     the second ring brush is mounted in the hole at the upper end of the fifth shaft; the third spring is mounted in the inner hole above the fifth shaft, and is placed on the lower end of the second ring brush the fourth lower gear is meshed with the fifth lower gear; and the fourth pulley is fixed on the lower end of the fifth shaft; the device comprises two sets of the ring brush units on left and right; 
     a ring brush system comprises: the second lower fixing plate is fixed on the right side below the guard plate through the right vertical plate; the second lower guiding sleeve are fixed on the second lower fixing plate; the second lower guiding post matching with the second lower guiding sleeve are fixed below the lower lifting plate; the two servo electric cylinder are fixed below the second lower fixing plate, and the output end thereof is hinged to the lower part of the third lower lifting plate the second sliding plate is mounted above the third lower lifting plate through the third lower guiding rail the third lower rack is fixed above the third lower lifting plate; the sixth lower servo motor is fixed above the second sliding plate, and the output end thereof is fixed with the lower gear the third lower gear is meshed with the lower rack; the third lower fixing plate is fixed above the second sliding plate through a transition block; the fourth lower fixing plate is mounted on the top end of the third lower fixing plate through the swivel  54 ; the shaft is mounted on the fourth lower fixing plate through a bearing; the third ring brush is mounted in the hole at the upper end of the sixth shaft; the fourth spring is mounted in the hole at the upper end of the sixth shaft, and is placed on the lower end of the ring brush; the fifth pulley is fixed below the shaft; the eighth lower servo motor is fixed on the lower end of the third lower fixing plate, and the output end thereof is connected to the lower part of the sixth shaft; the fourth pulley and the fifth pulley are connected by the second synchronous belt; the sixth lower ring gear is fixed to the inner ring of the swivel, and the upper end thereof is connected to the lower end of the fourth lower fixing plate; the seventh lower servo motor is fixed on the lower end of the third lower fixing plate, and the output end thereof is fixed with the sixth lower gear; and the sixth lower gear is meshed with the sixth lower ring gear; 
     a clamping driving system comprises: the left sliding plate and the right sliding plate are respectively mounted above the upper fixing plate through the upper guiding rail; the two left bearing pedestals are fixed above the left sliding plate; the two left shafts are respectively mounted inside the two left bearing pedestal through bearings; above the two left shafts are respectively fixed with a V-shaped roller; the two right bearing pedestals are fixed above the right sliding plate; the two right shafts are respectively mounted inside the two right bearing pedestals through bearings; above the two right shaft are respectively fixed with a V-shaped roller; the upper servo motor is fixed below the right sliding plate, and the output end thereof is connected with the lower part of one of the right shafts; the first upper cylinder is fixed above the upper fixing plate, and the output end thereof is connected with the left sliding plate; the upper gear is fixed above the upper fixing plate; the upper sliding plate and the right sliding plate are respectively fixed with the upper rack; and the upper rack is meshed with the upper gear; 
     a pressing system comprises: the upper bearing pedestal is fixed below the upper lifting plate; the upper shaft is mounted inside the upper bearing pedestal through a bearing; the pressure head is fixed on the lower end of the upper shaft by the cross hinge; the four upper guiding post are fixed above the upper lifting plate  86 ; the four upper guiding sleeve matching with the upper guiding post are fixed on the top end of the first frame; and the second upper cylinder are fixed on the top end of the frame, and the output ends thereof are hinged to the top end of the upper lifting plate. 
     The present disclosure in use is capable of cleaning and removing the burrs on the edges of the drain groove and the weight loss groove at the wheel weight-reducing pit. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is the main view of the wheel weight-reducing pit cleaning device of the present disclosure. 
         FIG.  2    is the left view . . . . 
         FIG.  3    is the main view of the side brush system . . . . 
         FIG.  4    is the main view of the ring brush system . . . . 
         FIG.  5    is the top view of the wheel weight-reducing pit that needs to be removed . . . . 
     
    
    
     DETAILED DESCRIPTION 
     The details and operation of the specific device according to the present disclosure will be described below with reference to the accompanying drawings. 
     The device consists of a first frame  1 , a first lower guiding post  2 , a first lower cylinder  3 , a first lower guiding sleeve  4 , a first lower fixing plate  5 , a rotary joint  6 , a spline shaft  7 , a first pulley  8 , a first lower servo motor  9 , a second pulley  10 , a first synchronous belt  11 , a third pulley  12 , a first lower lifting plate  13 , a support frame  14 , a spline sleeve  15 , a hollow shaft  16 , a first bearing pedestal  17 , a ball bowl  18 , a guard plate  19 , a center brush  20 , a second lower servo motor  21 , a second lower lifting plate  22 , a first lower guiding rail  23 , a first lower gear  24 , a first lower rack  25 , a left vertical plate  26 , a third lower servo motor  27 , a second lower gear  28 , a second lower rack  29 , a second lower guiding rail  30 , a first sliding plate  31 , a side brush  32 , a first shaft  33 , a first spring  34 , a second shaft  35 , a second bearing pedestal  36 , a fourth lower servo motor  37 , a lower overturning plate  38 , a fifth lower servo motor  39 , a third shaft  40 , a third bearing pedestal  41 , a second lower guiding post  42 , a second lower guiding sleeve  43 , a second lower fixing plate  44 , a third lower lifting plate  45 , a third lower gear  46 , a third lower rack  47 , a third lower guiding rail  48 , a second sliding plate  49 , a sixth lower servo motor  50 , a third lower fixing plate  51 , a second synchronous belt  52 , a fourth pulley  53 , a swivel  54 , a right vertical plate  55 , a fourth shaft  56 , a fourth lower gear  57 , a second spring  58 , a first ring brush  59 , a fifth lower gear  60 , a second ring brush  61 , a third spring  62 , a fifth shaft  63 , a third ring brush  64 , a fourth spring  65 , a sixth shaft  66 , a fifth pulley  67 , a fourth lower fixing plate  68 , a sixth lower gear  69 , a sixth lower ring gear  70 , a seventh lower servo motor  71 , an eighth lower servo motor  72 , servo electric cylinder  73 , a first upper cylinder  74 , an upper fixing plate  75 , an upper rack  76 , an upper guiding rail  77 , a left sliding plate  78 , left bearing pedestals  79 , left shafts  80 , V-shaped rollers  81 , a pressure head  82 , a cross hinge  83 , an upper shaft  84 , an upper bearing pedestal  85 , an upper lifting plate  86 , upper guiding post  87 , upper guiding sleeve  88 , a second upper cylinder  89 , an upper gear  90 , right shafts  91 , right bearing pedestals  92 , a right sliding plate  93 , an upper servo motor  94 , a third synchronous belt  95 , a sixth pulley  96 , a ninth lower servo motor  97  and a second lower cylinder  98 . 
     The lower lifting driving system comprises: the first lower guiding sleeve  4  are fixed below the first lower fixing plate  5 ; the first lower guiding post  2  matching with the first lower guiding sleeve  4  are fixed below the first lower lifting plate  13 ; the second lower cylinder  98  are also fixed on the first fixing plate  5 , and the output end thereof is hinged to the lower part of the first lower lifting plate  13 ; the first bearing pedestal  17  is fixed above the first lower lifting plate  13 ; the first hollow shaft  16  is mounted inside the first bearing pedestal  17  through a bearing; the spline sleeve  15  is mounted inside the hollow shaft  16  through a bearing; the spline shaft  7  is matched with the spline sleeve  15 ; the second pulley  10  is fixed below the hollow shaft  16 ; the guard plate  19  is mounted on the top end of the hollow shaft  16  through the ball bowl  18 ; the material of the portion of the guard plate  19  corresponding to the position of the wheel weight-reducing pit is removed, and the machining part of the wheel flange surface is protected; the first lower servo motor  9  is fixed on the left side below the first lower lifting plate  13  through a transition flange, and the output end thereof is fixed with the third pulley  12 ; the second pulley  10  and the third pulley  12  are connected by the first synchronous belt  11 ; the first pulley  8  is fixed below the spline sleeve  15 ; the ninth lower servo motor  97  is fixed on the right side below the first lower lifting plate  13  through a transition flange, and the output end thereof is fixed with the sixth pulley  96 ; the first pulley  8  and the sixth pulley  96  are connected by the third synchronous belt  95 ; the support frame  14  is fixed at the middle position below the first lower lifting plate  13 ; the first lower cylinder  3  is fixed below the support frame  14 , and the output end thereof is connected with the lower end of the rotary joint  6 ; the upper end of the rotary joint  6  is connected with the lower end of the spline shaft  7 ; and the center brush  20  is fixed on the top end of the spline shaft  7 . 
     The side brush system comprises: the left vertical plate  26  is fixed on the left side below the guard plate  19 ; the second lower lifting plate  22  is mounted on the right side of the left vertical plate  26  through the first lower guiding rail  23 ; the first lower rack  25  is also fixed on the right side of the left vertical plate  26 ; the third lower servo motor  27  is fixed above the right side of the second lower lifting plate  22 , and the output end thereof is fixed with the first lower gear  24 ; the first lower gear  24  is meshed with the first lower rack  25 ; the third bearing pedestal  41  is fixed below the right side of the second lower lifting plate  22 ; the third shaft  40  is mounted inside the third bearing pedestal  41  through a bearing; the second lower servo motor  21  is fixed below the left side of the second lower lifting plate  22 , the output end thereof is connected with the left side of the third shaft  40 ; the lower overturning plate  38  is fixed on the right side of the third shaft  40 ; the first sliding plate  31  is fixed is mounted above the lower overturning plate  38  through the second lower guiding rail  30 ; the second lower rack  29  is fixed on the left side of the first sliding plate  31 ; the fifth lower servo motor  39  is fixed below the lower overturning plate  38 , and the output end thereof is fixed with the second lower end gear  28 ; the second lower gear  28  is meshed with the second lower rack  29 ; the second bearing pedestal  36  is fixed above the first sliding plate  31 ; the second shaft  35  is mounted inside the second bearing pedestal  36  through a bearing; the outer side of the first shaft  33  is matched with the inner hole of the second shaft  35 ; the spring  34  is mounted in the inner hole above the second shaft  35 , and is placed on the lower end of the first shaft  33 ; the side brush  32  is fixed on the top end of the first shaft  33 ; and the fourth lower servo motor  37  is fixed below the first sliding plate  31 , and the output end is connected with the lower end of the second shaft  35 . 
     The ring brush unit comprises: the fourth shaft  56  is mounted on the fourth lower fixing plate  68  through a bearing; the fourth lower gear  57  is fixed on the outer side above the fourth shaft  56 ; the first ring brush  59  is mounted in the hole at the upper end of the fourth shaft  56 ; the second spring  58  is mounted in the inner hole above the fourth shaft  56 , and is placed on the lower end of the first ring brush  59 ; the fifth shaft  63  is mounted on the fourth lower fixing plate  68  through the bearing, and is placed on the right side of the fourth shaft  56 ; the fifth lower gear  60  is fixed on the outer side above the fifth shaft  63 ; the second ring brush  61  is mounted in the hole at the upper end of the fifth shaft  63 ; the third spring  62  is mounted in the inner hole above the fifth shaft  63 , and is placed on the lower end of the second ring brush  61 ; the fourth lower gear  57  is meshed with the fifth lower gear  60 ; and the fourth pulley  53  is fixed on the lower end of the fifth shaft  63 ; the device comprises two sets of the ring brush units on left and right. 
     The ring brush system comprises: the second lower fixing plate  44  is fixed on the right side below the guard plate  19  through the right vertical plate  55 ; the second lower guiding sleeve  43  are fixed on the second lower fixing plate  44 ; the second lower guiding post  42  matching with the second lower guiding sleeve  43  are fixed below the third lower lifting plate  45 ; the two servo electric cylinder  73  are fixed below the second lower fixing plate  44 , and the output end thereof is hinged to the lower part of the third lower lifting plate  45 ; the second sliding plate  49  is mounted above the third lower lifting plate  45  through the third lower guiding rail  48 ; the third lower rack  47  is fixed above the third lower lifting plate  45 ; the sixth lower servo motor  50  is fixed above the second sliding plate  49 , and the output end thereof is fixed with the third lower gear  46 ; the third lower gear  46  is meshed with the third lower rack  47 ; the third lower fixing plate  51  is fixed above the second sliding plate  49  through a transition block; the fourth lower fixing plate  68  is mounted on the top end of the third lower fixing plate  51  through the swivel  54 ; the sixth shaft  66  is mounted on the fourth lower fixing plate  68  through a bearing; the third ring brush  64  is mounted in the hole at the upper end of the sixth shaft  66 ; the fourth spring  65  is mounted in the hole at the upper end of the sixth shaft  66 , and is placed on the lower end of the ring brush; the fifth pulley  67  is fixed below the sixth shaft  66 ; the eighth lower servo motor  72  is fixed on the lower end of the third lower fixing plate  51 , and the output end thereof is connected to the lower part of the sixth shaft  66 ; the fourth pulley  53  and the fifth pulley  67  are connected by the second synchronous belt  52 ; the sixth lower ring gear  70  is fixed to the inner ring of the swivel  54 , and the upper end thereof is connected to the lower end of the fourth lower fixing plate  68 ; the seventh lower servo motor  71  is fixed on the lower end of the third lower fixing plate  51 , and the output end thereof is fixed with the sixth lower gear  69 ; and the sixth lower gear  69  is meshed with the sixth lower ring gear  70 . 
     The clamping driving system comprises: the left sliding plate  78  and the right sliding plate  93  are respectively mounted above the upper fixing plate  75  through the upper guiding rail  77 ; the two left bearing pedestals  79  are fixed above the left sliding plate  78 ; the two left shafts  80  are respectively mounted inside the two left bearing pedestal  79  through bearings; above the two left shafts  80  are respectively fixed with a V-shaped roller  81 ; the two right bearing pedestals  92  are fixed above the right sliding plate  93 ; the two right shafts  91  are respectively mounted inside the two right bearing pedestals  92  through bearings; above the two right shaft  91  are respectively fixed with a V-shaped roller  81 ; the upper servo motor  94  is fixed below the right sliding plate  93 , and the output end thereof is connected with the lower part of one of the right shafts  91 ; the first upper cylinder  74  is fixed above the upper fixing plate  75 , and the output end thereof is connected with the left sliding plate  78 ; the upper gear  90  is fixed above the upper fixing plate  75 ; the upper sliding plate  78  and the right sliding plate  93  are respectively fixed with the upper rack  76 ; and the upper rack  76  is meshed with the upper gear  90 . 
     The pressing system comprises: the upper bearing pedestal  85  is fixed below the upper lifting plate  86 ; the upper shaft  84  is mounted inside the upper bearing pedestal  85  through a bearing; the pressure head  82  is fixed on the lower end of the upper shaft  84  by the cross hinge  83 ; the four upper guiding post  87  are fixed above the upper lifting plate  86 ; the four upper guiding sleeve  88  matching with the upper guiding post  87  are fixed on the top end of the frame  1 ; and the second upper cylinder  89  are fixed on the top end of the frame  1 , and the output ends thereof are hinged to the top end of the upper lifting plate  86 . 
     During operation, the first upper cylinder  74  causes the four V-shaped rollers  81  to synchronously clamp the wheel through the upper gear  90 , the upper rack  76  and the upper guiding rail  77 ; the second upper cylinder  89  make the pressure head  82  press the wheel riser through the upper guiding post  87  and the upper guiding sleeve  88 ; the upper servo motor  94  rotates the clamped wheel through the right shaft  91 ; the ninth lower servo motor  97  drives the spline sleeve  15  to rotate through the first pulley  8 , the sixth pulley  96  and the third synchronous belt  95 ; through the cooperation of the sleeve  15  with the spline shaft  7 , the spline shaft  7  and the center brush  20  can be driven to rotate; the lower servo motor  9  drives the hollow shaft  16  and the guard plate  19  to rotate through the second pulley  10 , the third pulley  12  and the first synchronous belt  11 , and the rotation will be stopped when the guard plate  19  corresponds to the position of the weight-reducing pit of the wheel; the second lower cylinder  98  tightly fits the upper end surface of the guard plate  19  with the wheel flange through the first lower guiding post  2  and the first lower guiding sleeve  4 ; and at this time, the center bush  20  can remove the burrs at the center hole of the wheel, and the height of the center brush  20  can be adjusted by the lower cylinder  3  for different wheels. 
     The fourth lower servo motor  37  can drive the side brush  32  to rotate through the second shaft  35 ; the side brush  32  can be floated up and down by the first spring  34 ; the fifth lower servo motor  39  can achieve the adjustment of the left and right positions of the side brush  32  through the second lower gear  28 , the second lower rack  29  and the second lower guiding rail  30 ; the third lower servo motor  27  can achieve the adjustment of the upper and lower positions of the side brush  32  through the first lower gear  24 , the first lower rack  25  and the first lower guiding rail  23 ; and the second lower servo motor  21  can achieve the adjustment of the front and rear angles of the side brush  32  through the third shaft  40 . The burrs at the edge of the drain groove can be removed when the rotating brush  32  contacts the wheel weight-reducing pit. 
     The eighth lower servo motor  72  can drive the fifth pulley  67  and the third ring brush  64  to rotate through the sixth shaft  66 ; the fourth spring  65  can achieve the floating of the ring brush  64 ; the fifth pulley  67  can drive the fourth pulley  53  and the fifth shaft  63  to rotate through the second synchronous belt  52 ; the fifth shaft  63  can drive the second ring brush  61  to rotate; the third spring  62  can achieve the floating of the second ring brush  61 ; the fifth lower gear  60  can drive the fourth shaft  56  and the ring brush  59  to rotate by meshing with the fourth lower gear  57 ; the second spring  58  can achieve the floating of the ring brush  59 ; the seventh lower servo motor  71  can achieve the adjustment of the angles of the fourth lower fixing plate  68  and each ring brush through the sixth lower gear  69 , the sixth lower ring gear  70  and the swivel  54 ; the sixth lower servo motor  50  can achieve the adjustment of the left and right positions of the fourth lower fixing plate  68  and each ring brush through the third lower gear  46 , the third lower rack  47  and the third lower guiding rail  48 ; and the servo electric cylinder  73  can achieve the adjustment of the upper and lower positions of the fourth lower fixing plate  68  and each ring brush through the second lower guiding post  42  and the second lower guiding sleeve  43 . The burrs at the edge of the weight loss groove can be removed when the rotating brush contacts the wheel weight-reducing pit.