A support ear drilling tool and a support ear drilling method

Abstract

The present application relates to a kind of support ear hole drilling tool and support ear hole drilling method, belong to mechanical processing technical field, for drilling ear hole on support, its vertical positioning component includes: bottom plate, first nut, bolt, locating plate, locating sleeve, first nut is fixed with bottom plate, bolt is connected with first nut by thread, locating plate is located in the upside of bolt, locating plate is equipped with locating hole, locating sleeve is equipped in locating hole, guide portion is inserted in locating hole, guide portion is in contact with locating sleeve, and abutting portion is in contact with the end of bolt away from first nut;Its horizontal positioning component includes: adjusting plate, adjusting screw, correction plate, adjusting plate is fixed with locating plate, adjusting plate is connected with adjusting screw, one end of adjusting screw is connected with correction plate, and correction plate includes two correction parts, and rotating adjusting screw can drive correction plate to move to make correction part and drilling portion abut;Realize the positioning of support along vertical, horizontal direction, solve the problem of not accurate positioning in processing.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a tooling and method for drilling ear holes in a bracket. Background Technology

[0002] In the field of mechanical manufacturing, drilling ear holes in brackets is a critical process, and its machining accuracy directly affects the quality and reliability of subsequent assembly. Currently, V-blocks are commonly used as the main positioning element for brackets with circular or arc-shaped features. However, this positioning method has inherent defects. The V-block and the outer surface of the workpiece have line contact, and to ensure the workpiece can be smoothly inserted, there must be a clearance between them. During drilling, the torque generated by the drill bit is transmitted to the contact surface through the workpiece. Due to the limited constraint force of the line contact, coupled with the existence of the clearance, the workpiece is prone to slight rotation or displacement. This fretting directly causes the actual drilling position to deviate from the desired center, resulting in inaccurate positioning of the drilled ear hole, ultimately leading to the scrapping of the bracket. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect of inaccurate positioning in the existing technology of bracket drilling process, thereby providing a bracket ear hole drilling tool.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A tooling for drilling ear holes in a bracket includes:

[0006] A vertical positioning assembly includes a base plate, a first nut, a bolt, a positioning plate, and a positioning sleeve. The first nut is fixed to the base plate, the bolt is threadedly connected to the first nut, the positioning plate is located above the bolt, and the positioning plate has a positioning hole. The positioning sleeve is fitted inside the positioning hole, the guide part is inserted into the positioning hole, and the guide part abuts against the positioning sleeve. The abutting part abuts against the end of the bolt away from the first nut.

[0007] A horizontal positioning assembly includes an adjusting plate, an adjusting screw, and a correction plate. The adjusting plate is fixed to the positioning plate and connected to the adjusting screw. One end of the adjusting screw is connected to the correction plate. The correction plate includes two correction parts. Rotating the adjusting screw can move the correction plate so that the correction parts abut against the drilled part.

[0008] Preferably, the calibration plate further includes a connecting portion, and both calibration portions are fixed to the connecting portion;

[0009] The connecting part is provided with a first hole and a second hole that are connected. The first hole is located on the side of the second hole away from the adjusting plate. The diameter of the first hole is larger than the diameter of the second hole. The horizontal positioning component also includes a second nut, which is located in the first hole and is threadedly connected to the adjusting screw.

[0010] Preferably, the adjusting screw includes a first rod portion and a second rod portion, the diameter of the first rod portion being larger than the diameter of the second rod portion; the first rod portion abuts against the adjusting plate and the positioning plate, the second rod portion is disposed in the first hole and the second hole, and the second nut is threadedly connected to the second rod portion.

[0011] Preferably, the adjusting plate is provided with a threaded hole, the adjusting plate is threadedly connected to the adjusting screw, the connecting part is provided with a rotating hole, the connecting part is rotatably connected to the second rod part, and rotating the adjusting screw drives the correction plate to reciprocate toward the main body part.

[0012] Preferably, the positioning plate has a guide groove on the side near the first nut, the correction plate is slidably connected to the positioning plate forming the guide groove, and the two correction parts are respectively located on both sides of the horizontal direction of the main body.

[0013] Preferably, the positioning plate has a drill hole on each side near the positioning hole, and a drill sleeve is fitted into each of the two drill holes. The side of the positioning plate away from the adjusting screw has multiple anti-rotation bolt holes.

[0014] To achieve the above objectives, the present invention also employs the following technical solution:

[0015] A method for drilling an ear hole in a support includes the following steps:

[0016] S1, in the vertical direction, ensure that the distance between the bolt nut and the positioning plate is greater than the height of the bracket, insert the guide part into the positioning hole, and the main body abuts against the lower side of the positioning plate. Rotate the bolt, and the bolt nut moves upward until the bolt nut abuts against the abutting part.

[0017] S2, rotate the adjusting screw, the adjusting screw drives the correction plate to move in the direction close to the bracket until the correction part abuts against the drilling part;

[0018] S3, after the direction of the bracket is corrected, rotate the bolt again to move it upward until the nut of the bolt abuts against the abutting part and tightens the bracket;

[0019] S4, the drill bit moves downward in the vertical direction, the drill bit abuts against the drilled part through the drill hole, and drills ear holes on the drilled part;

[0020] S5, after the ear hole drilling is completed, rotate the adjusting screw to move it away from the bracket, rotate the bolt to move the bolt downward, and remove the bracket.

[0021] Preferably, in step S1, the guide portion abuts against the positioning sleeve, the bolt is rotated counterclockwise, the bolt moves upward in the vertical direction, the nut of the bolt abuts against the abutting portion, the bolt is rotated clockwise, the bolt moves downward in the vertical direction, the nut of the bolt loosens from the abutting portion, and the drilled lug abuts against the side of the positioning plate near the first nut.

[0022] Preferably, in step S2, rotating the adjusting screw clockwise causes the inclined surface of the correction part to abut against the inclined surface of the main body; rotating the adjusting screw counterclockwise causes the correction part to move away from the main body.

[0023] Preferably, in step S2, the first nut is welded to the base plate. First, the first nut is threaded onto the bolt and tightened, and then the first nut is welded to the base plate. The first nut and the bolt are concentrically arranged, and the bolt can rotate flexibly.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] The above-described technical solution provides a bracket drilling tool for drilling ear holes on a bracket. The bracket to be processed includes a main body, two drilling parts, a guide part, and an abutment part, all fixed to the main body. The two drilling parts are symmetrically arranged horizontally around the main body, and the guide part and the abutment part are located on opposite sides of the main body in the vertical direction. The bracket drilling tool includes a vertical positioning assembly and a horizontal positioning assembly. The vertical positioning assembly includes a base plate, a first nut, a bolt, a positioning plate, and a positioning sleeve. The first nut is fixed to the base plate, and the bolt is threadedly connected to the first nut. The positioning plate is located above the bolt and has a positioning hole. A positioning sleeve is fitted inside the positioning hole. The positioning sleeve and guide part are inserted into the positioning hole and abut against each other. The positioning sleeve is used to position the center of the bracket. The abutting part abuts against the end of the bolt away from the first nut. Rotating the bolt moves it upward in the vertical direction, so that the bolt abuts against the bracket, thereby achieving the positioning of the bracket in the vertical direction. The horizontal positioning component includes an adjusting plate, an adjusting screw, and a correction plate. The adjusting plate is fixed to the positioning plate and connected to the adjusting screw. One end of the adjusting screw is connected to the correction plate. The correction plate includes two correction parts. The positioning plate has a guide groove on the side near the nut, thereby achieving the positioning of the bracket in the horizontal direction. This solves the problem of inaccurate positioning of the bracket during the processing. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a front view of the bracket drilling tool provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the bracket drilling tool provided in an embodiment of the present invention;

[0029] Figure 3 This is a front view of the calibration plate provided in an embodiment of the present invention;

[0030] Figure 4 This is a top view of the calibration plate provided in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the adjusting screw provided in an embodiment of the present invention;

[0032] Figure 6 This is a top view of the adjustment plate provided in an embodiment of the present invention;

[0033] Figure 7 This is a top view of the positioning plate provided in an embodiment of the present invention;

[0034] Figure 8 This is a front view of the positioning plate provided in an embodiment of the present invention;

[0035] Figure 9 This is a front view of the bracket provided in an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Vertical positioning assembly; 11. Base plate; 12. First nut; 13. Bolt; 14. Positioning plate; 141. Positioning hole; 142. Guide groove; 143. Drill hole; 144. Anti-rotation bolt hole; 15. Positioning sleeve; 16. Drill sleeve;

[0038] 2. Horizontal positioning assembly; 21. Adjusting plate; 211. Threaded hole; 22. Adjusting screw; 221. First rod part; 222. Second rod part; 23. Correction plate; 231. Connecting part; 232. First hole; 233. Second hole; 234. Rotating hole; 235. Correction part; 24. Second nut;

[0039] 3. Support; 31. Main body; 32. Drilling part; 33. Guide part; 34. Abutment part. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] Before introducing the bracket ear-hole drilling fixture, it's necessary to know that the object processed by this fixture is bracket 3. Please refer to... Figure 9 As can be seen from the figure, the bracket 3 includes a main body 31, two drilled parts 32, a guide part 33 and an abutment part 34, all of which are fixed to the main body 31. The outer edge of the main body 31 is inclined. The two drilled parts 32 are symmetrically arranged in the horizontal direction with the main body 31 as the center. In the vertical direction, the guide part 33 and the abutment part 34 are located on both sides of the main body 31.

[0044] Please read carefully. Figures 1 to 9This invention provides a bracket drilling tool, comprising: a vertical positioning component 1 and a horizontal positioning component 2. The bracket drilling tool also includes a support plate. Specifically, the vertical positioning component 1 includes a base plate 11, a first nut 12, a bolt 13, a positioning plate 14, and a positioning sleeve 15. The base plate 11 has four countersunk holes on the side facing the positioning plate 14, and the first nut 12 is welded to the base plate 11. The bolt 13 is threadedly connected to the first nut 12, or an internal threaded hole 211 is directly provided on the base plate 11, and the bolt 13 is threadedly connected to the internal threaded hole 211. The abutment part 34 abuts against the end of the bolt 13 away from the first nut 12. In the vertical direction, the positioning plate 14 is located above the bolt 13. The positioning plate 14 also has four countersunk holes. The two ends of the support plate are fixed to the base plate 11 and the positioning plate 14 by eight fixing bolts 13. The positioning plate 14 and the bolt 13 are spaced apart. The working space between the positioning plate 14 and the bolt 13 is used to place the bracket 3. In addition, the positioning plate 14 is provided with a positioning hole 141, and a positioning sleeve 15 is fitted inside the positioning hole 141. The guide part 33 is inserted into the positioning hole 141 and abuts against the positioning sleeve 15. The positioning sleeve 15 is used to position the center of the bracket 3. Rotating the bolt 13 causes the bolt 13 to move upward in the vertical direction. The nut of the bolt 13 abuts against the bracket 3, thereby realizing the positioning of the bracket 3 in the vertical direction.

[0045] It is known that the horizontal positioning component 2 includes an adjusting plate 21, an adjusting screw 22, and a correction plate 23. The adjusting plate 21 is provided with two fixing holes. The adjusting plate 21 can be fixed to the side of the positioning plate 14 away from the anti-rotation screw hole 144 by fixing bolts 13. The fixing method is not limited. The adjusting plate 21 is connected to the adjusting screw 22, and one end of the adjusting screw 22 is connected to the correction plate 23. The drill bit moves downward along the drill hole 143 to drill a hole in the bracket 3. The bracket 3 is subjected to torque, causing it to deviate. Centered on the main body 31, the drill lugs rotate along the main body 31, deviating at least from their initial positions. Therefore, both drill lugs need to be limited. The correction plate 23 includes two correction parts 235. Rotating the adjusting screw 22 can drive the correction plate 23 to move along the direction of the bracket 3, so that the correction parts 235 abut against the drill hole 32. The bracket 3 can rotate counterclockwise or clockwise after deviating from its initial position. The two correction parts 235 abut against the two drill holes 32 respectively, restricting the bracket 3 from rotating counterclockwise or clockwise, thereby achieving horizontal positioning. The vertical positioning component 1 and the horizontal positioning component 2 have a positioning function for the bracket 3 in the vertical and horizontal directions, respectively, thereby achieving the positioning of the bracket 3 and solving the problem of inaccurate positioning during processing.

[0046] Please see Figure 3 and Figure 4It is conceivable that the correction plate 23 also includes a connecting part 231, and both correction parts 235 are fixed to the connecting part 231. The end of the correction part 235 near the bracket 3 is set with an inclined surface. Rotating the adjusting screw 22 pushes the correction part 235 to move towards the bracket 3, so that the inclined surface of one end of the correction part 235 approaches the outer edge inclined surface of the main body 31 until the adjusting screw 22 can no longer be rotated, thereby realizing the correction of the bracket 3 in the horizontal direction. The connecting part 231 includes a first hole 232 and a second hole 233 that are connected. The first hole 232 is located on the side of the second hole 233 away from the adjusting plate 21. The diameter of the first hole 232 is larger than the diameter of the second hole 233. The horizontal positioning component 2 also includes a second nut 24, which is located in the first hole 232 and is threadedly connected to the adjusting screw 22. The adjusting screw 22 can drive the calibration plate 23 to move back and forth in the direction toward the bracket 3. When the adjusting screw 22 is rotated clockwise, the calibration plate 23 moves toward the bracket 3 and the calibration plate 23 presses against the bracket 3; when the adjusting screw 22 is rotated counterclockwise, the calibration plate 23 moves away from the bracket 3 and the calibration plate 23 releases the bracket 3.

[0047] Please see Figure 5 It can be conceivable that the adjusting screw 22 includes a first rod portion 221 and a second rod portion 222. The diameter of the first rod portion 221 is larger than the diameter of the second rod portion 222. The first rod portion 221 abuts against the adjusting plate 21 and the positioning plate 14. The second rod portion 222 is set in the first hole 232 and the second hole 233. The diameter of the second rod portion 222 is smaller than the diameter of the first hole 232 and the second hole 233. The second nut 24 is threadedly connected to the second rod portion 222, and the diameter of the second nut 24 is larger than the diameter of the second hole 233. This allows the correction plate 23 to be pushed forward and backward by the joint surface of the first rod portion 221 and the second rod portion 222 when tightening. Moving forward means moving towards the bracket 3, and moving backward means moving away from the bracket 3. The correction plate 23 is pulled backward by the end of the second rod portion 222 near the second nut 24. The design that the inner diameter of the first hole 232 is larger than the outer diameter of the second rod portion 222 effectively avoids interference between them during the forward and backward processes.

[0048] Please see Figure 6As can be imagined, the adjusting plate 21 has a threaded hole 211, and the adjusting plate 21 is threadedly connected to the adjusting screw 22. The threaded hole 211 on the adjusting plate 21 accurately converts the rotational motion into the linear displacement of the correction plate 23, allowing the operator to adjust the tightness between the correction part 235 and the drilling part 32 by rotating the adjusting screw 22, ensuring the accuracy of horizontal positioning. The connecting part 231 has a rotating hole 234, and the connecting part 231 is rotatably connected to the second rod part 222. This design allows the correction plate 23 to make adaptive angle fine adjustments when the adjusting screw 22 is pushed, which can better fit the inclined surface of the main body 31 of the bracket 3, ensuring that the two correction parts 235 apply pressure synchronously and evenly, and preventing the bracket 3 from shifting due to uneven force at a single point. Rotating the adjusting screw 22 clockwise moves the correction plate 23 toward the main body 31 to tighten the bracket 3, and rotating the adjusting screw 22 counterclockwise moves the correction plate 23 away from the main body 31 to loosen the bracket 3.

[0049] Please see Figure 7 It can be imagined that a drill hole 143 is provided on each side of the positioning plate 14 near the positioning hole 141. Neither of the two drill holes 143 is connected to the positioning hole 141. The drill holes 143 are set at a precise position relative to the central axis of the bracket 3. A drill sleeve 16 is fitted in each of the two drill holes 143. The two drill sleeves 16 are used to guide the drill bit to be precisely inserted into the drill hole 143 and to drill the bracket 3. The inner diameter of the drill sleeve 16 and the outer diameter of the drill bit are clearance fit to facilitate the entry and exit of the drill bit in the drill sleeve 16. The outer diameter of the drill sleeve 16 and the positioning plate 14 are between interference fit and clearance fit to facilitate the replacement of the drill sleeve 16 after the inner diameter is worn. Based on this fit, multiple anti-rotation bolt holes 144 are provided on the side of the positioning plate 14 away from the adjusting screw 22 for installing the anti-rotation bolts 13 of the drill sleeve 16.

[0050] Please see Figure 8 It is conceivable that the positioning plate 14 is provided with a guide groove 142 on the side near the first nut 12. The correction plate 23 is slidably connected to the positioning plate 14 that forms the guide groove 142, which restricts the movement of the correction plate 23 to a preset trajectory, avoiding the rotation or offset of the correction plate 23, thereby enhancing the positioning stability of the bracket 3 in the horizontal direction and effectively preventing the bracket 3 from shaking or tilting during processing. The two correction parts 235 are located on both sides of the horizontal direction of the main body 31. When the adjusting screw 22 drives the correction plate 23 to move toward the bracket 3, the two inclined surfaces of the correction part 235 abut against the two inclined surfaces of the main body 31, which can correct the offset of the bracket 3 in the horizontal direction in both directions.

[0051] This embodiment also provides a method for drilling ear holes in a bracket, including the following steps:

[0052] S1, in the vertical direction, ensure that the distance between the nut of bolt 13 and the positioning plate 14 is greater than the height of bracket 3, insert guide part 33 into positioning hole 141, the main body part 31 abuts against the lower side of positioning plate 14, rotate bolt 13, bolt 13 moves upward until the nut of bolt 13 abuts against abutting part 34.

[0053] S2, rotate the adjusting screw 22, the adjusting screw 22 drives the correction plate 23 to move in the direction close to the bracket 3 until the correction part 235 abuts against the drilling part 32;

[0054] S3, after the direction of bracket 3 is corrected, rotate bolt 13 again to move it upward until the nut of bolt 13 abuts against the abutment part 34 and tightens the bracket 3.

[0055] S4, along the vertical direction, the drill bit moves downward, the drill bit abuts against the drilled part 32 through the drill hole 143, and drills ear holes on the drilled part 32;

[0056] S5, after the ear hole drilling is completed, rotate the adjusting screw 22 to move away from the bracket 3, rotate the bolt 13 to move the bolt 13 downward, and remove the bracket 3.

[0057] In step S1, the guide part 33 abuts against the positioning sleeve 15, the bolt 13 is rotated counterclockwise, the bolt 13 moves upward in the vertical direction, the nut of the bolt 13 abuts against the abutting part 34, the bolt 13 is rotated clockwise, the bolt 13 moves downward in the vertical direction, the nut of the bolt 13 loosens from the abutting part 34, and the drilled ear abuts against the side of the positioning plate 14 near the first nut 12.

[0058] In step S2, rotating the adjusting screw 22 clockwise causes the inclined surface of the correction part 235 to come into contact with the inclined surface of the main body 31; rotating the adjusting screw 22 counterclockwise causes the correction part 235 to move away from the main body 31.

[0059] In step S2, the first nut 12 is welded to the base plate 11. First, the first nut 12 is threaded onto the bolt 13 and tightened. Then, the first nut 12 is welded to the base plate 11. The first nut 12 and the bolt 13 are concentrically arranged, and the bolt 13 can rotate flexibly.

[0060] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A tooling for drilling ear holes on a bracket (3), the bracket (3) comprising a main body (31), and two drilling portions (32), a guide portion (33), and an abutment portion (34) fixed to the main body (31), the two drilling portions (32) being symmetrically arranged in the horizontal direction with the main body (31) as the center, the guide portion (33) and the abutment portion (34) being located on both sides of the main body (31) in the vertical direction, characterized in that, include: The vertical positioning assembly (1) includes a base plate (11), a first nut (12), a bolt (13), a positioning plate (14), and a positioning sleeve (15). The first nut (12) is fixed to the base plate (11), the bolt (13) is threadedly connected to the first nut (12), the positioning plate (14) is located above the bolt (13), and the positioning plate (14) is provided with a positioning hole (141). The positioning sleeve (15) is fitted inside the positioning hole (141), the guide part (33) is inserted into the positioning hole (141), and the guide part (33) abuts against the positioning sleeve (15). The abutting part (34) abuts against the end of the bolt (13) away from the first nut (12). The horizontal positioning assembly (2) includes an adjusting plate (21), an adjusting screw (22), and a correction plate (23). The adjusting plate (21) is fixed to the positioning plate (14). The adjusting plate (21) is connected to the adjusting screw (22). One end of the adjusting screw (22) is connected to the correction plate (23). The correction plate (23) includes two correction parts (235). Rotating the adjusting screw (22) can drive the correction plate (23) to move so that the correction parts (235) abut against the drilling part (32).

2. The bracket drilling tooling according to claim 1, characterized in that, The calibration plate (23) also includes a connecting part (231), and both calibration parts (235) are fixed to the connecting part (231); The connecting part (231) is provided with a first hole (232) and a second hole (233) that are connected. The first hole (232) is located on the side of the second hole (233) away from the adjusting plate (21). The diameter of the first hole (232) is larger than the diameter of the second hole (233). The horizontal positioning component (2) also includes a second nut (24). The second nut (24) is located in the first hole (232) and is threadedly connected to the adjusting screw (22).

3. The bracket drilling tooling according to claim 2, characterized in that, The adjusting screw (22) includes a first rod portion (221) and a second rod portion (222). The diameter of the first rod portion (221) is larger than the diameter of the second rod portion (222). The first rod portion (221) abuts against the adjusting plate (21) and the positioning plate (14). The second rod portion (222) is disposed in the first hole (232) and the second hole (233). The second nut (24) is threadedly connected to the second rod portion (222).

4. The bracket drilling tooling according to claim 3, characterized in that, The adjusting plate (21) is provided with a threaded hole (211), the adjusting plate (21) is threadedly connected to the adjusting screw (22), the connecting part (231) is provided with a rotating hole (234), the connecting part (231) is rotatably connected to the second rod part (222), and rotating the adjusting screw (22) drives the correction plate (23) to reciprocate toward the main body part (31).

5. The bracket drilling tooling according to claim 1, characterized in that, The positioning plate (14) has a guide groove (142) on the side near the first nut (12). The correction plate (23) is slidably connected to the positioning plate (14) that forms the guide groove (142), and the two correction parts (235) are located on both sides of the main body (31) in the horizontal direction.

6. The bracket drilling tooling according to claim 1, characterized in that, The positioning plate (14) has a drill hole (143) on each side near the positioning hole (141), and a drill sleeve (16) is fitted in each of the two drill holes (143). The side of the positioning plate (14) away from the adjusting screw (22) has multiple anti-rotation bolt holes (144).

7. A method for drilling ear holes in a bracket, characterized in that, The bracket drilling tool according to any one of claims 1-6 includes the following steps: S1, in the vertical direction, ensure that the distance between the nut of the bolt (13) and the positioning plate (14) is greater than the height of the bracket (3), insert the guide part (33) into the positioning hole (141), the main body part (31) abuts against the lower side of the positioning plate (14), rotate the bolt (13), the bolt (13) moves upward until the nut of the bolt (13) abuts against the abutting part (34); S2, rotate the adjusting screw (22), the adjusting screw (22) drives the correction plate (23) to move in the direction close to the bracket (3) until the correction part (235) abuts against the drilling part (32); S3, after the direction of the bracket (3) is corrected, rotate the bolt (13) again to move it upward until the nut of the bolt (13) abuts against the abutting part (34) and tightens the bracket (3). S4, along the vertical direction, the drill bit moves downward, the drill bit abuts against the drilled part (32) through the drill hole (143), and drills ear holes on the drilled part (32); S5, after the ear hole drilling is completed, rotate the adjusting screw (22) to move it away from the bracket (3), rotate the bolt (13) to move the bolt (13) downward, and take out the bracket (3).

8. The method for drilling ear holes in a bracket according to claim 7, characterized in that, In step S1, the guide part (33) abuts against the positioning sleeve (15), the bolt (13) is rotated counterclockwise, the bolt (13) moves upward in the vertical direction, the nut of the bolt (13) abuts against the abutting part (34), the bolt (13) is rotated clockwise, the bolt (13) moves downward in the vertical direction, and the nut of the bolt (13) loosens from the abutting part (34).

9. The method for drilling ear holes in a bracket according to claim 7, characterized in that, In step S2, the adjusting screw (22) is rotated clockwise, causing the inclined surface of the correction part (235) to abut against the inclined surface of the main body part (31); the adjusting screw (22) is rotated counterclockwise, causing the correction part (235) to move away from the main body part (31).

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