Automobile hub drilling tool

Abstract

The utility model discloses an automobile hub drilling tool which comprises a working table, a plurality of supporting legs are arranged on the lower surface of the working table, two motor plates with the same height are arranged between the supporting legs, and a first motor and a second motor are arranged on the two motor plates respectively. A driving shaft of the first motor and a driving shaft of the second motor both face the lower surface of the workbench, a first driving wheel is arranged at the driving shaft end of the first motor, a second driving wheel is arranged at the driving shaft end of the second motor, and a chain is wound between the first driving wheel and the second driving wheel in a sleeving mode. In the drilling process of the drill bit, the shaping pipe can be manually adjusted to a proper position, the four air outlet pipes are right opposite to the drilling position, the air pump works, metal scraps generated during drilling are sprayed away, the four air outlet pipes discharge air at the same time, the blowing effect is good, and the efficiency is high; and as the hubs move to the position below the drill bit one by one, the drilling efficiency is high, and the hubs of different sizes can be firmly clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wheel hub processing equipment, in particular to an automobile wheel hub drilling tool. Background Art

[0002] The automobile wheel hub is an important part of the automobile. During the processing of the automobile wheel hub, after the wheel hub is cast, it is usually necessary to fine-process the bolt holes of the wheel hub, such as expanding the hole, deburring, etc. The specific operation process is to use a clamping device to clamp the wheel hub on the workbench, and then use a drilling tool to process the bolt holes of the wheel hub; in the conventional automobile wheel hub drilling operation, two sets of clamps are generally required to drill the PCD hole and the valve hole. During the drilling process, the operator needs to disassemble and flip the automobile wheel hub for many times. Due to multiple clamping, the factors affecting the position of the product increase, resulting in poor position of the product. Therefore, we will redesign the relevant fixtures and processing technology to facilitate the operator to drill the wheel hub and reduce the error caused by multiple disassembly and flipping of the automobile wheel hub; during the drilling process of the wheel hub, a large amount of aluminum debris will be generated, which will affect the drilling, easily resulting in the drilled empty size not meeting the design requirements, and the burrs on the edge of the drilled hole will further increase.

[0003] In view of the above problems, the present utility model is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an automobile wheel hub drilling tool to solve the problems mentioned in the background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions.

[0006] The utility model provides a vehicle wheel hub drilling tool, comprising a workbench, a plurality of legs are arranged on the lower surface of the workbench, two motor plates with the same height are arranged between the legs, a first motor and a second motor are arranged on the two motor plates respectively, a driving shaft of the first motor and a driving shaft of the second motor are both facing the lower surface of the workbench, a first driving wheel is arranged at the driving shaft end of the first motor, a second driving wheel is arranged at the driving shaft end of the second motor, and a chain is wound around the first driving wheel and the second driving wheel;

[0007] The upper surface of the workbench is provided with an inner groove, a through groove and an outer groove in sequence from the inside to the outside, the outer groove, the inner groove and the through groove are all long and circular, the center positions of the outer groove, the inner groove and the through groove coincide, the through groove runs through the workbench, and the chain is located on the lower surface of the through groove;

[0008] A plurality of movable plates are evenly arranged between the outer groove and the inner groove at equal distances, guide rods are vertically arranged at the four corners of the lower surface of the movable plate, a swivel is arranged at the end of the guide rod, the swivel is movably installed in the outer groove and the inner groove, and a plurality of guide rods are slidably installed in the outer groove and the inner groove respectively, a connecting rod is vertically arranged in the center of the lower surface of the movable plate, one end of the connecting rod away from the movable plate is fixed to the upper surface of the chain, and the connecting rod can move with the chain;

[0009] A plurality of support rods are vertically arranged at four corners of the upper surface of the movable plate, and clamping mechanisms are arranged on the upper surfaces of the movable plate and the support rods.

[0010] Preferably, the clamping mechanism includes a table plate, a clamping block, a rotating plate and a third motor, the table plate is located on the upper surface of the support rod, the third motor is mounted on the movable plate, the rotating plate is mounted on the driving shaft of the third motor, three first sliding grooves are evenly and equidistantly arranged on the table plate, the clamping block is slidably installed in the first sliding grooves, a boss is arranged on the lower surface of the clamping block, three arc grooves are arranged on the rotating plate, and the boss is located in the arc groove.

[0011] Preferably, drilling frames are set on both sides of the long side of the workbench, the drilling frames are vertical, the cross-section of the drilling frames is "n"-shaped, the horizontal section of the drilling frame is provided with a second slide groove that passes through the drilling frame, a suspension block is vertically arranged in the second slide groove, the suspension block is slidably connected with the second slide groove, a plurality of electric push rods are arranged on the lower surface of the suspension block, a lower base plate is arranged at the piston rod end of the electric push rod, a fourth motor is vertically arranged on the lower surface of the lower base plate, the driving shaft of the fourth motor is vertically downward, and a drill bit is installed on the driving shaft end of the motor through a coupling.

[0012] Preferably, air pumps are provided on both sides below the vertical part of the drilling frame, an air outlet pipe of the air pump is threadedly connected to a shaping tube, and an air outlet pipe is provided at one end of the shaping tube away from the air pump.

[0013] Preferably, the air outlet pipe is trumpet-shaped, the small opening of the air outlet pipe is threadedly connected to the shaping tube, and the height of the air pump is consistent with the height of the clamping mechanism.

[0014] Preferably, the three first slide grooves are distributed in a circle on the table, and an angle of 120° is formed between adjacent first slide grooves. The clamping block is slidably connected in the first slide groove along the length direction of the first slide groove. The clamping block is provided with rubber teeth on the side facing the center of the rotating plate, and the rubber teeth can increase the friction force.

[0015] Preferably, the three arc grooves are equidistantly distributed around the center of the rotating plate, the distance from the head end of the arc groove to the center of the rotating plate is greater than the distance from the tail end of the arc groove to the center of the rotating plate, the cross-sectional diameter of the boss is consistent with the width of the arc groove, and the rotation of the arc groove can drive the boss to move.

[0016] Preferably, a third slide groove is provided on the inner walls on both sides of the second slide groove, protrusions are provided on the side surfaces on both sides of the suspension block, and the protrusions are slidably installed in the third slide groove, a handle is provided on the upper surface of the suspension block, and a top plate is provided on the lower surface of the suspension block, and the tail end of the electric push rod is provided on the lower surface of the top plate. There are four electric push rods, which are evenly distributed between the top plate and the lower bottom plate, and the extension and retraction of the electric push rods drive the fourth motor and the drill bit below to move up and down.

[0017] Preferably, the four air pumps are symmetrically distributed about the transverse axis and the longitudinal axis of the drill bit rack, the air outlets of the four air pumps are all facing the inner side of the drill bit rack, and the drill bit rack is movably mounted on the workbench by bolts.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The wheel hubs are placed on the table one by one, and the third motor is operated to drive the rotating plate to rotate. The arc groove rotates with the rotating plate, and the arc groove pushes the boss and the clamping block to move. The three clamping blocks can move toward or away from each other, so that the wheel hubs of different sizes can be firmly clamped. After the wheel hub is fixed, the first motor and the second motor are operated, and the chain rotates. The chain drives all the moving plates and the clamping mechanism to move slowly through the connecting rod, so that all the wheel hubs move on the workbench, and each wheel hub passes through the drill bit rack;

[0020] When a wheel hub is located in the drill bit holder, the first motor and the second motor stop working, and the chain is stationary, so that the wheel hub is just located below the drill bit, and the electric push rod extends to drive the fourth motor and the drill bit to move downward, and the fourth motor rotates, driving the drill bit to rotate, and the drill bit drills into the wheel hub to achieve drilling; when drilling holes at different positions of the wheel hub, the handle on the suspension block can be held to move the suspension block to different positions, so that the fourth motor and the drill bit are also at different positions, so as to achieve drilling holes at different positions on the wheel hub;

[0021] During the drilling process, the shaping tube can be manually adjusted to a suitable position so that the four air outlet tubes are just facing the drilling position. The air pump works, and the external air enters the air pump, and then passes through the shaping tube and is ejected from the air outlet tube to spray away the metal debris generated by the drilling, thereby ensuring the smooth drilling. The four air outlet tubes discharge air at the same time, and the blowing effect is better and the efficiency is higher. In addition, as the wheel hubs move to the bottom of the drill bit one by one, the drilling efficiency is also higher. Wheel hubs of different sizes can be firmly clamped, and there is no need to adjust the position of the wheel hub back and forth multiple times, thereby improving the drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the utility model;

[0023] Figure 2 It is a three-dimensional diagram of the utility model;

[0024] Figure 3 It is a three-dimensional diagram of the utility model;

[0025] Figure 4 It is a three-dimensional diagram of the utility model;

[0026] Figure 5 It is a three-dimensional diagram of the utility model;

[0027] Figure 6 It is a three-dimensional diagram of the utility model;

[0028] Figure 7 It is a three-dimensional diagram of the utility model.

[0029] In the figure: 1. workbench; 11. support leg; 12. motor plate; 13. outer groove; 14. inner groove; 15. through groove; 2. first motor; 21. first driving wheel; 22. chain; 3. second motor; 31. second driving wheel; 4. moving plate; 41. guide rod; 42. connecting rod; 43. supporting rod; 5. clamping mechanism; 51. table; 52. first slide groove; 53. clamping block; 54. rubber tooth; 55. boss; 56. rotating plate; 57. arc groove; 6. drilling frame; 61. second slide groove; 62. suspension block; 63. electric push rod; 64. lower base plate; 65. fourth motor; 66. drill bit; 7. air pump; 71. shaping tube; 72. air outlet tube. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] like Figure 1-7 As shown, a vehicle wheel hub drilling tool comprises a workbench 1, wherein a plurality of legs 11 are arranged on the lower surface of the workbench 1, and two motor plates 12 of the same height are arranged between the legs 11, and a first motor 2 and a second motor 3 are arranged on the two motor plates 12 respectively, and the driving shafts of the first motor 2 and the second motor 3 are both facing the lower surface of the workbench 1, and a first driving wheel 21 is arranged at the driving shaft end of the first motor 2, and a second driving wheel 31 is arranged at the driving shaft end of the second motor 3, and a chain 22 is sleeved between the first driving wheel 21 and the second driving wheel 31, and the first driving wheel 21 and the second driving wheel 31 are both sprockets, and the first motor 2 and the second motor 3 work to drive the first driving wheel 21 and the second driving wheel 31 to rotate, and the first driving wheel 21 and the second driving wheel 31 can drive the chain 22 to rotate;

[0033] The upper surface of the workbench 1 is provided with an inner groove 14, a through groove 15 and an outer groove 13 in sequence from the inside to the outside. The outer groove 13, the inner groove 14 and the through groove 15 are all long and circular. The center positions of the outer groove 13, the inner groove 14 and the through groove 15 coincide. The through groove 15 runs through the workbench 1, and the chain 22 is located on the lower surface of the through groove 15.

[0034] A plurality of movable plates 4 are evenly and equidistantly arranged between the outer groove 13 and the inner groove 14, and guide rods 41 are respectively vertically arranged at the four corners of the lower surface of the movable plate 4, and a swivel is arranged at one end of the guide rod 41 away from the movable plate 4, and the plurality of guide rods 41 are respectively slidably installed in the outer groove 13 and the inner groove 14, and the outer surface of the swivel fits the inner wall of the outer groove 13 and the inner groove 14, and the movable plate 4 can move on the workbench 1 by moving in the outer groove 13 and the inner groove 14 through the guide rods 41, and a connecting rod 42 is vertically arranged at the center of the lower surface of the movable plate 4, and one end of the connecting rod 42 away from the movable plate 4 is fixed to the upper surface of the chain 22, that is, the rotation of the chain 22 can drive the movable plate 4 to rotate through the connecting rod 42;

[0035] A plurality of support rods 43 are vertically arranged at the four corners of the upper surface of the movable plate 4. A clamping mechanism 5 is arranged on the upper surfaces of the movable plate 4 and the support rods 43. The support rods 43 support the clamping mechanism 5. The rotation of the movable plate 4 drives the clamping mechanism 5 to rotate, that is, the clamping mechanism 5 moves on the workbench 1 together with the movable plate 4.

[0036] In another embodiment, the clamping mechanism 5 includes a table 51, a clamping block 53, a rotating plate 56 and a third motor. The table 51 is located on the upper surface of the support rod 43, and the support rod 43 supports the table 51. The third motor is arranged and installed in the center of the upper surface of the movable plate 4. The rotating plate 56 is installed on the driving shaft of the third motor, that is, the third motor is working and can drive the rotating plate 56 to rotate. Three first slide grooves 52 are evenly and evenly spaced on the table 51, and the clamping block 53 is slidably installed in the first slide grooves. In 52, the clamping block 53 slides forward and backward in the length direction of the first slide groove 52, that is, the three clamping blocks 53 can approach or move away from each other to clamp wheel hubs of different sizes. The lower surface of the clamping block 53 is provided with a boss 55, and the rotating plate 56 is provided with three arc grooves 57. The boss 55 is located in the arc groove, and the arc groove 57 rotates with the rotating plate 56. The movement of the position of the arc groove 57 drives the boss 55 to move forward and backward, thereby driving the clamping block 53 to slide, and the arc groove 57 drives the boss 55 and the clamping block 53.

[0037] In another embodiment, drilling frames 6 are set up on both sides of the long sides of the workbench 1, and the drilling frames 6 are vertical. The cross-section of the drilling frames 6 is "n"-shaped, and the outer groove 13, the inner groove 14 and the through groove 15 are all located inside and below the drilling frames 6. When a wheel hub moves with the clamping mechanism 5 and the movable plate 4, the wheel hub can be just below the drilling frame 6. The horizontal section of the drilling frame 6 is provided with a second slide groove 61 that runs through the drilling frame 6, and a suspension block 62 is vertically provided in the second slide groove 61. The suspension block 62 is slidably connected to the second slide groove 61, that is, the suspension block 62 moves back and forth in the second slide groove 61, so that the position of the suspension block 62 can be adjusted. A plurality of electric push rods 63 are arranged on the lower surface of the suspension block 62, and a lower base plate 64 is arranged at the piston rod end of the electric push rod 63. A fourth motor 65 is vertically arranged on the lower surface of the lower base plate 64. The movement of the suspension block 62 can drive the fourth motor 65 and the drill bit 66 below to move. The driving shaft of the fourth motor 65 is vertically downward, and a drill bit 66 is installed on the driving shaft end of the fourth motor 65 through a coupling, that is, the drill bit 66 can be removed from the fourth motor 65, which is convenient for replacing drill bits 66 of different models. The extension and retraction of the electric push rod 63 drives the fourth motor 65 and the drill bit 66 to move up and down, and the drill bit 66 moves downward to realize drilling of the wheel hub.

[0038] Air pumps 7 are provided on both sides below the vertical part of the drilling frame 6. The air outlet pipe of the air pump 7 is threadedly connected with a shaping tube 71. The threaded connection facilitates the disassembly of the shaping tube 71 for dust removal and maintenance. An air outlet pipe 72 is provided at the end of the shaping tube 71 away from the air pump. Air flow is ejected from the air outlet pipe 72 to generate wind force to blow away metal debris generated by drilling. When the air pump 7 is working, external air enters the air pump 7 and is then ejected through the shaping tube 71 and the air outlet pipe 72.

[0039] In another embodiment, the air outlet pipe 72 is trumpet-shaped, so that it can face the drilling position with a larger area, the ejected airflow is larger, and a larger wind is formed. The small mouth of the air outlet pipe 72 is threadedly connected to the shaping tube 71, and the height of the air pump 7 is consistent with the height of the clamping mechanism 5. In this way, the shaping tube 71 is located around the wheel hub, which makes it convenient to face the air outlet pipe 72 to the wheel hub from the position.

[0040] The three first slide grooves 52 are distributed in a circle on the table 51, and the angle between adjacent first slide grooves 52 is 120°. The clamping block 53 is slidably connected in the first slide groove 52 along the length direction of the first slide groove 52. The three clamping blocks 53 can move toward the center of the table 51, or move away from the center of the table 51. The size between the three clamping blocks 53 can be adjusted to clamp wheels of different sizes. The clamping block 53 is provided with rubber teeth 54 on the side facing the center of the table 51. The rubber teeth 54 can increase the friction force of clamping the wheel hub, and the rubber teeth 54 are serrated on the side close to the table 51.

[0041] The three arc grooves 57 are equidistantly distributed around the center of the rotating plate 56. The distance from the head end of the arc groove 57 to the center of the rotating plate 56 is greater than the distance from the tail end of the arc groove 57 to the center of the rotating plate 56. The cross-sectional diameter of the protrusion 55 is consistent with the width of the arc groove 57, that is, the rotation of the arc groove 57 can promote the movement of the protrusion 55, so as to drive the clamping block 53 to slide in the first sliding groove 52, and the protrusion 55 is pushed to move by the arc groove 57. This connection result is reliable and will not fail during long-term use.

[0042] The inner walls on both sides of the second slide groove 61 are provided with third slide grooves, and the side surfaces on both sides of the suspension block 62 are provided with protrusions, and the protrusions are slidably installed in the third slide grooves. The upper surface of the suspension block 62 is provided with a handle, and holding the handle can drive the suspension block 62 to move. The suspension block 62 moves so that the drill bit 66 below faces different positions of the wheel hub, and the lower surface of the suspension block 62 is provided with a top plate, and the tail end of the electric push rod 63 is provided on the lower surface of the top plate. There are four electric push rods 63, which are evenly distributed between the top plate and the lower bottom plate 64. The electric push rod 63 is connected to the top plate and the lower bottom plate 64 by bolts, which makes it convenient to disassemble the electric push rod 63 for inspection and replacement.

[0043] The four air pumps 7 are symmetrically distributed with respect to the transverse axis and the longitudinal axis of the drilling frame 6. The air outlet pipes 72 of the four air pumps 7 are all facing the inner side of the drilling frame 6. The shaping tube 71 can be bent into different shapes so that the four air outlet pipes 72 face the front end of the drill bit 66 from different angles. The drilling frame 6 is movably mounted on the workbench 1 by bolts. The entire drilling frame 6 is convenient to disassemble for inspection and replacement.

[0044] In summary: when in use, the wheel hubs are placed on the table 51 one by one, the third motor is operated, driving the rotating plate 56 to rotate, the arc groove 57 rotates with the rotating plate 56, the arc groove 57 pushes the boss 55 and the clamping block 53 to move, and the three clamping blocks 53 can move toward or away from each other, so that the wheel hubs of different sizes can be firmly clamped. After the wheel hubs are fixed, the first motor 2 and the second motor 3 are operated, the chain 22 rotates, and the chain 22 drives all the moving plates 4 and the clamping mechanism to move slowly through the connecting rod 42, so that all the wheel hubs move on the workbench 1, and each wheel hub passes through the drilling frame 6;

[0045] When a wheel hub is located in the drilling frame 6, the first motor 2 and the second motor 3 stop working, and the chain 22 is stationary, so that the wheel hub is just located below the drill bit 66, and the electric push rod 63 extends, which can drive the fourth motor 65 and the drill bit 66 to move downward, and the fourth motor 65 rotates, driving the drill bit 66 to rotate, and the drill bit 66 drills into the wheel hub to achieve drilling; when drilling holes at different positions of the wheel hub, the handle on the suspension block 62 can be held to move the suspension block 62 to different positions, so that the fourth motor 65 and the drill bit 66 are also at different positions to achieve drilling holes at different positions on the wheel hub; the drill bit 66 and the drive shaft of the fourth motor 65 are detachably connected, which is convenient for replacing drill bits 66 of different thicknesses and drilling through holes of different sizes on the wheel hub;

[0046] During the drilling process of the drill bit 66, the shaping tube 71 can be manually adjusted to a suitable position so that the four air outlet tubes 72 are just facing the drilling position. The air pump 7 works, and the external air enters the air pump 7, and then passes through the shaping tube 71 and is ejected from the air outlet tube 72 to spray away the metal debris generated by the drilling, thereby ensuring smooth drilling. The four air outlet tubes 72 blow air at the same time, and the blowing effect is better and the efficiency is higher. As the wheel hubs move one by one to the bottom of the drill bit 66, the drilling efficiency is also higher. Wheel hubs of different sizes can be firmly clamped, and there is no need to adjust the position of the wheel hub back and forth many times, which improves the drilling efficiency and reduces the errors caused by multiple disassembly and flipping of the automobile wheel hub.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automobile wheel hub drilling tool, characterized in that: The workbench (1) comprises a workbench (1), wherein a plurality of legs (11) are arranged on the lower surface of the workbench (1), two motor plates (12) of the same height are arranged between the legs (11), a first motor (2) and a second motor (3) are arranged on the two motor plates (12) respectively, a driving shaft of the first motor (2) and a driving shaft of the second motor (3) are both facing the lower surface of the workbench (1), a first driving wheel (21) is arranged at the driving shaft end of the first motor (2), a second driving wheel (31) is arranged at the driving shaft end of the second motor (3), and a chain (22) is wound between the first driving wheel (21) and the second driving wheel (31); The upper surface of the workbench (1) is provided with an inner groove (14), a through groove (15) and an outer groove (13) in sequence from the inside to the outside, the outer groove (13), the inner groove (14) and the through groove (15) are all long circular strips, the center positions of the outer groove (13), the inner groove (14) and the through groove (15) coincide, the through groove (15) passes through the workbench (1), and the chain (22) is located on the lower surface of the through groove (15); A plurality of movable plates (4) are evenly and evenly arranged between the outer groove (13) and the inner groove (14); guide rods (41) are vertically arranged at the four corners of the lower surface of the movable plate (4); the plurality of guide rods (41) are slidably installed in the outer groove (13) and the inner groove (14); a connecting rod (42) is vertically arranged in the center of the lower surface of the movable plate (4); an end of the connecting rod (42) away from the movable plate (4) is fixed to the upper surface of the chain (22); A plurality of support rods (43) are vertically arranged at the four corners of the upper surface of the movable plate (4), and a clamping mechanism (5) is arranged on the upper surfaces of the movable plate (4) and the support rods (43).

2. The automobile wheel hub drilling tool according to claim 1, characterized in that: The clamping mechanism (5) comprises a table (51), a clamping block (53), a rotating plate (56) and a third motor, wherein the table (51) is located on the upper surface of the support rod (43), the third motor is arranged on the movable plate (4), the rotating plate (56) is installed on the driving shaft of the third motor, three first sliding grooves (52) are evenly and equidistantly arranged on the table (51), the clamping block (53) is slidably installed in the first sliding grooves (52), a convex column (55) is arranged on the lower surface of the clamping block (53), and three arc grooves (57) are arranged on the rotating plate (56), and the convex column (55) is located in the arc groove.

3. The automobile wheel hub drilling tool according to claim 1, characterized in that: Drilling frames (6) are arranged on both sides of the long sides of the workbench (1), the drilling frames (6) are vertical, and the cross section of the drilling frames (6) is "n"-shaped. The horizontal section of the drilling frames (6) is provided with a second slide groove (61) penetrating the drilling frames (6), a suspension block (62) is vertically arranged in the second slide groove (61), and the suspension block (62) is slidably connected to the second slide groove (61), and a plurality of electric push rods (63) are arranged on the lower surface of the suspension block (62), and a lower base plate (64) is arranged at the piston rod end of the electric push rod (63), and a fourth motor (65) is vertically arranged on the lower surface of the lower base plate (64), and the driving shaft of the fourth motor (65) is vertically downward, and a drill bit (66) is installed at the driving shaft end of the fourth motor (65) through a coupling.

4. The automobile wheel hub drilling tool according to claim 3, characterized in that: An air pump (7) is provided on both sides below the vertical part of the drilling frame (6); an air outlet pipe of the air pump (7) is threadedly connected to a shaping pipe (71); and an air outlet pipe (72) is provided at one end of the shaping pipe (71) away from the air pump.

5. The automobile wheel hub drilling tool according to claim 4, characterized in that: The air outlet pipe (72) is trumpet-shaped, and the small opening of the air outlet pipe (72) is threadedly connected to the shaping pipe (71). The height of the air pump (7) is consistent with the height of the clamping mechanism (5).

6. The automobile wheel hub drilling tool according to claim 2, characterized in that: The three first slide grooves (52) are distributed on the platform (51) in a circular shape, and an angle of 120° is formed between adjacent first slide grooves (52). The clamping block (53) is slidably connected in the first slide groove (52) along the length direction of the first slide groove (52), and a rubber tooth (54) is provided on a side of the clamping block (53) facing the center of the rotating plate (56).

7. The automobile wheel hub drilling tool according to claim 2, characterized in that: The three arc grooves (57) are equidistantly distributed around the center of the rotating plate (56) as the center point, the distance from the head end of the arc groove (57) to the center of the rotating plate (56) is greater than the distance from the tail end of the arc groove (57) to the center of the rotating plate (56), and the cross-sectional diameter of the protrusion (55) is consistent with the width of the arc groove (57).

8. The automobile wheel hub drilling tool according to claim 3, characterized in that: The inner walls on both sides of the second slide groove (61) are provided with a third slide groove, the side surfaces on both sides of the suspension block (62) are provided with protrusions, and the protrusions are slidably installed in the third slide groove, the upper surface of the suspension block (62) is provided with a handle, and the lower surface of the suspension block (62) is provided with a top plate, and the tail end of the electric push rod (63) is provided on the lower surface of the top plate, and there are four electric push rods (63) that are evenly distributed between the top plate and the lower base plate (64).

9. The automobile wheel hub drilling tool according to claim 4, characterized in that: The four air pumps (7) are symmetrically distributed about the transverse axis and the longitudinal axis of the drilling frame (6); the air outlets of the four air pumps (7) are all facing the inner side of the drilling frame (6); and the drilling frame (6) is movably mounted on the workbench (1) by means of bolts.

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