Magnetic drill fixing mechanism for processing fractured bolt

Abstract

The utility model provides a magnetic drill fixing mechanism for treating a fractured bolt, which relates to the technical field of magnetic drills, and comprises a mounting plate fixedly connected with a workpiece and provided with an operation hole for a drill bit of the magnetic drill to pass through and align at the fractured bolt; the first limiting piece is used for limiting the magnetic drill to move along the plane where the mounting plate is located; the second limiting piece is used for limiting the magnetic drill to move perpendicular to the plane where the mounting plate is located; and the first limiting piece and the second limiting piece are detachably connected with the mounting plate. The magnetic drill has the effect of improving the fixing stability of the magnetic drill.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic drills, and in particular to a magnetic drill fixing mechanism for processing broken bolts. Background Art

[0002] High-strength bolts of wind turbines often break during operation. After most high-strength bolts break, the broken bolts stuck in the internal threads can be removed by relatively simple drilling and reverse threading. However, after the high-strength bolts of some units break, serious corrosion occurs between the bolts and the internal threads, making it difficult to remove the high-strength bolts broken in the internal threads. Magnetic drills are usually used to deal with this problem.

[0003] In the related art, when removing a rusted broken bolt, the magnetic drill is fixed near the broken bolt on the workpiece through the magnetic base, so that the drill bit of the magnetic drill is aligned with the broken bolt, thereby facilitating the drill bit to drill and reverse the broken bolt, reducing the possibility of the magnetic drill being offset during drilling, thereby reducing the difficulty of removing the broken bolt.

[0004] Regarding the above-mentioned related technologies, since the high-strength bolts used in wind turbines are made of high-strength alloys and have a high hardness, when a conventional magnetic drill is drilling, as the drilling travel force increases, when the drill bit stress is greater than the adsorption force generated by the magnetic drill, the magnetic drill will deviate or detach from the workpiece, which is not conducive to removing the broken bolts. Summary of the invention

[0005] In order to improve the problem of a magnetic drill being deflected or disengaged when removing a broken bolt, the present application provides a magnetic drill fixing mechanism for handling a broken bolt.

[0006] The present application provides a magnetic drill fixing mechanism for processing broken bolts, which adopts the following technical solution:

[0007] A magnetic drill fixing mechanism for processing broken bolts, comprising

[0008] The mounting plate is fixedly connected to the workpiece and is provided with an operating hole for the drill bit of the magnetic drill to pass through and align with the broken bolt;

[0009] A first limiting member, used to limit the movement of the magnetic drill along the plane where the mounting plate is located; and

[0010] The second limiter is used to limit the movement of the magnetic drill perpendicular to the plane where the mounting plate is located;

[0011] The first limiting member and the second limiting member are both detachably connected to the mounting plate.

[0012] Furthermore, the first limit member includes a limit frame and a positioning assembly, the inner contour of the limit frame is matched with the peripheral contour of the magnetic drill base, the limit frame is sleeved on the peripheral side of the magnetic drill base, and the positioning assembly is arranged on the limit frame and is used to position and fix the limit frame so that the drill bit of the magnetic drill is located within the range of the operating hole.

[0013] Furthermore, the positioning assembly includes a positioning ring and a connecting piece, the positioning ring is arranged on a side of the limit frame close to the drill bit and is plugged into the mounting plate through the operating hole, and the connecting piece is detachably connected to the mounting plate.

[0014] Furthermore, the connecting member includes a connecting rod, a sleeve and a first locking bolt, one end of the connecting rod is connected to the side wall of the limit frame away from the positioning ring, and the other end is connected to the side wall of the sleeve, a first positioning screw hole is opened on the mounting plate, the sleeve is coaxially arranged with the first positioning screw hole, and the first locking bolt passes through the sleeve and is threadedly connected to the mounting plate through the first positioning screw hole.

[0015] Furthermore, the connecting rod includes a coaxially arranged rod portion and a barrel portion, one end of the rod portion is connected to the sleeve, the other end extends into the barrel portion and is slidably connected to the barrel portion, and the sliding direction is along its own length direction, one end of the barrel portion is connected to the limit frame, and the other end is coaxially rotatably provided with an adjusting nut, the rod portion is threadedly connected to the adjusting nut, the positioning ring is slidably connected to the limit frame, and the sliding direction is parallel to the sliding direction of the rod portion.

[0016] Furthermore, the second limiting member includes a pressure plate and a second locking bolt, the pressure plate abuts against the top surface of the magnetic drill base, a second positioning screw hole is opened on the mounting plate, and the second locking bolt passes through the pressure plate and is threadedly connected to the mounting plate through the second positioning screw hole.

[0017] Furthermore, a waist-shaped hole is provided on the mounting plate, the direction of the waist-shaped hole is parallel to the sliding direction of the positioning ring, and the second positioning bolt is located in the waist-shaped hole.

[0018] Furthermore, the mounting plate is provided with a plurality of groups of first positioning screw holes and second positioning screw holes.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. By setting a mounting plate, a first limiting member and a second limiting member, when using a magnetic drill to remove a broken bolt, the mounting plate is fixed on the workpiece, and the first limiting member is used to limit the movement of the magnetic drill along the plane where the mounting plate is located, thereby reducing the possibility of the magnetic drill being offset, and the second limiting member is used to limit the movement of the magnetic drill perpendicular to the plane where the mounting plate is located, thereby reducing the possibility of the magnetic drill being separated from the workpiece, thereby achieving the effect of improving the stability of the magnetic drill fixation;

[0021] 2. By setting the connecting rod coaxially as a rod portion and a barrel portion, and setting an adjusting nut, after completing the positioning of the magnetic drill, the adjusting nut is turned to make the rod portion slide relative to the barrel portion, thereby adjusting the length of the connecting rod to achieve fine-tuning of the position of the magnetic drill, so as to facilitate the drill bit of the magnetic drill to align the broken bolt more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0024] Figure 2 It is an exploded schematic diagram of an embodiment of the present application.

[0025] Figure numerals: 1. magnetic drill; 11. drill body; 12. base; 13. drill bit; 2. mounting plate; 21. operating hole; 22. first positioning screw hole; 23. second positioning screw hole; 24. mounting hole; 3. first limit piece; 31. limit frame; 32. positioning ring; 33. connecting rod; 331. rod; 332. cylinder; 333. adjusting nut; 34. sleeve; 35. first locking bolt; 4. second limit piece; 41. pressure plate; 411. waist-shaped hole; 42. second locking bolt. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The present application embodiment discloses a magnetic drill fixing mechanism for processing broken bolts. Figure 1The fixing mechanism of the magnetic drill 1 for handling broken bolts includes a mounting plate 2, a first stopper 3 and a second stopper 4. The mounting plate 2 is provided with an operation hole 21 and a mounting hole 24. There are multiple mounting holes 24. A prefabricated screw hole is provided on the workpiece. The multiple mounting holes 24 correspond to the positions of the prefabricated screw holes on the workpiece. The bolts are passed through the mounting holes 24 and threadedly connected with the prefabricated screw holes on the workpiece to achieve a fixed connection between the mounting plate 2 and the workpiece. The relative positions of the operation hole 21 and the mounting hole 24 can adapt to the workpiece, so that when the mounting hole 24 is fixed to the workpiece, the operation hole 21 is aligned with the broken bolt. The first stopper 3 and the second stopper 4 are both detachably connected to the mounting plate 2. The first stopper 3 limits the movement of the magnetic drill 1 along the plane where the mounting plate 2 is located, reducing the possibility of the magnetic drill 1 being offset. The second stopper 4 limits the movement of the magnetic drill 1 perpendicular to the plane where the mounting plate 2 is located, reducing the possibility of the magnetic drill 1 being separated from the mounting plate 2. When the magnetic drill 1 drills a hole in a broken bolt and the stress of the drill bit 13 is greater than the adsorption force generated by the magnetic drill 1 , the first limiter 3 and the second limiter 4 limit the magnetic drill 1 , thereby improving the fixing stability of the magnetic drill 1 .

[0028] Since one end of the base 12 of the magnetic drill 1 close to the drill bit 13 protrudes from the drill body 11, in order to facilitate limiting the magnetic drill 1, in this embodiment, a first limiting member 3 is used to limit the peripheral side of the base 12 of the magnetic drill 1, and a second limiting member 4 is used to limit the top surface of the base 12 protruding from the drill body 11.

[0029] Specifically, refer to Figure 2 The first limiting member 3 includes a limiting frame 31 and a positioning assembly. The limiting frame 31 is a rectangular frame. The inner contour of the limiting frame 31 matches the peripheral contour of the base 12. That is, when the limiting frame 31 is sleeved on the base 12, the inner wall of the limiting frame 31 and the peripheral wall of the base 12 are both in contact. The positioning assembly is arranged on the limiting frame 31. Through the positioning assembly, the limiting frame 31 is conveniently positioned and fixed so that the drill bit 13 is located within the range of the operating hole 21.

[0030] The positioning assembly includes a positioning ring 32 and a connecting piece. The outer diameter of the positioning ring 32 is the same as the diameter of the operating hole 21, and is connected to the side of the limit frame 31 close to the drill bit 13, so that the positioning ring 32 can be plugged into the mounting plate 2 through the operating hole 21. The connecting piece is detachably connected to the mounting plate 2. The connecting piece can be located on the side wall of the limit frame 31 adjacent to the positioning piece, or on the side wall of the limit frame 31 away from the positioning piece. In this embodiment, in order to facilitate the subsequent fine-tuning of the position of the magnetic drill 1, the connecting piece is arranged on the side wall of the limit frame 31 away from the positioning piece.

[0031] Since the broken bolts of the wind turbine generator set are most likely located on the vertical plane, the magnetic drill 1 needs to be fixed horizontally on the workpiece, that is, the base 12 of the magnetic drill 1 is arranged vertically. When the user positions the magnetic drill 1 on the mounting plate 2, it is necessary to overcome the gravity of the magnetic drill 1, which makes positioning difficult. In order to reduce the difficulty of positioning the magnetic drill 1 by the user, the present embodiment adopts a pre-fixing method to fix the magnetic drill 1.

[0032] Specifically, the connecting member includes a connecting rod 33, a sleeve 34 and a first locking bolt 35. The connecting rod 33 is arranged parallel to the mounting plate 2 and perpendicular to the side wall of the limit frame 31 away from the positioning ring 32. The sleeve 34 is a cylindrical shape with both ends open. The sleeve 34 is arranged perpendicular to the mounting plate 2. One end of the connecting rod 33 is welded and fixed to the limit frame 31, and the other end is welded and fixed to the side wall of the sleeve 34. The threaded section of the first locking bolt 35 can pass through the sleeve 34. The mounting plate 2 is provided with a first positioning screw hole 22, and the first locking bolt 35 can be threadedly connected to the first positioning screw hole 22 by passing through the sleeve 34.

[0033] When it is necessary to remove the broken bolt located on the vertical surface of the workpiece, first fix the mounting plate 2 on the workpiece by bolts, then sleeve the limit frame 31 on the base 12 of the magnetic drill 1, and pass the threaded section of the first locking bolt 35 through the sleeve 34, move the magnetic drill 1, align the first locking bolt 35 with the first positioning screw hole 22, and thread the first locking bolt 35 with the mounting plate 2 through the first positioning screw hole 22, and temporarily do not tighten the first locking bolt 35 to achieve a pre-fixing effect, so that the sleeve 34 can be fixed with the first locking bolt 35 is a rotating shaft that rotates freely, and the sleeve 34 can slide slightly along the length direction of the first locking bolt 35, and the magnetic drill 1 can rotate freely along the limit frame 31. The limit frame 31 is then rotated to align the positioning ring 32 with the operating hole 21, and then the sleeve 34 is slid to insert the positioning ring 32 into the operating hole 21. Finally, the first locking bolt 35 is locked to tighten the sleeve 34 against the mounting plate 2. The first locking bolt 35 is pressed against the section of the sleeve 34 away from the mounting plate 2, thereby fixing the magnetic drill 1.

[0034] In order to reduce the influence of machining errors on the positioning of the magnetic drill 1 and improve the alignment accuracy between the drill bit 13 and the broken bolt, in this embodiment, the position of the limit frame 31 relative to the sleeve 34 and the positioning ring 32 is adjustable so that the magnetic drill 1 can be adjusted to a smaller extent.

[0035] Specifically, the connecting rod 33 is configured as a rod portion 331 and a barrel portion 332, both of which are cylindrical and coaxially arranged, the diameter of the rod portion 331 is the same as the inner diameter of the barrel portion 332, one end of the rod portion 331 is welded to the side wall of the sleeve 34, and the other end is slidably arranged in the barrel portion 332, one end of the barrel portion 332 away from the rod portion 331 is welded to the side wall of the limit frame 31, and the other end is coaxially rotatably arranged with an adjusting nut 333, one end of the rod portion 331 close to the barrel portion 332 is provided with an external thread, and the rod portion 331 is threadedly connected to the adjusting nut 333. As an alternative embodiment, the rod portion 331 and the barrel portion 332 can also be interchanged, that is, the rod portion 331 is connected to the limit frame 31, and the barrel portion 332 is connected to the sleeve 34.

[0036] A sliding rod is welded and fixed to one side of the positioning ring 32 close to the limit frame 31, and a sliding sleeve is welded and fixed to one side of the limit frame 31 close to the positioning ring 32. The sliding rod is slidably connected to the sliding sleeve, and the sliding direction is parallel to the sliding direction of the rod portion 331. In order to prevent the sliding rod from rotating relative to the sliding sleeve, the cross-section of the sliding rod is set to be non-circular, that is, the cross-section of the sliding rod can be deformed or other irregular shapes. In this embodiment, the cross-section of the sliding rod is square, and a positive direction sliding groove matching the shape of the sliding rod is provided inside the sliding sleeve.

[0037] After the sleeve 34 is locked, the adjusting nut 333 is rotated to make the barrel 332 and the rod 331 slide relative to each other, so that the drill bit 13 of the magnetic drill 1 is slightly adjusted in the positioning ring 32, thereby aligning the drill bit 13 with the broken bolt.

[0038] The second limiting member 4 includes a pressing plate 41 and a second locking bolt 42. The pressing plate 41 abuts against the top surface of the side of the base 12 protruding from the drill body 11. Two second locking bolts 42 are provided, which are respectively located at the two ends of the pressing plate 41. A plurality of second positioning screw holes 23 are provided on the mounting plate 2, and one second positioning screw hole 23 corresponds to one second locking bolt 42. The second locking bolt 42 is threadedly connected through the pressing plate 41 and the second positioning screw hole 23, so that the pressing plate 41 is tightly abutted against the top surface of the base 12, thereby limiting the movement of the magnetic drill 1 perpendicular to the mounting plate 2. In order to accommodate the fine adjustment of the position of the magnetic drill 1, a waist-shaped hole 411 is provided on the pressing plate 41 near the second locking bolt 42. The length direction of the waist-shaped hole 411 is parallel to the sliding direction of the positioning ring 32 relative to the limiting block, so that the pressing plate 41 can be adjusted to a small extent relative to the second positioning screw hole 23.

[0039] In order to further improve the stability of the limit frame 31, the limit frame 31 can be arranged in close contact with the mounting plate 2 ( Figure 2 The middle limit frame 31 is not in contact with the mounting plate 2), thereby reducing the possibility of the limit frame 31 flipping over.

[0040] Since the convenience of on-site construction is affected by the surrounding environment, in order to facilitate the fixing of the magnetic drill 1 in a position that is more suitable for construction, multiple groups of first positioning screw holes 22 and second positioning screw holes 23 are set on the mounting plate 2. In this embodiment, two groups of first positioning screw holes 22 and second positioning screw holes 23 are provided, so that the magnetic drill 1 has multiple installation positions, which is convenient for on-site construction.

[0041] The implementation principle of a magnetic drill fixing mechanism for handling broken bolts in an embodiment of the present application is as follows: the mounting plate 2 is fixedly connected to the workpiece, the limit frame 31 is sleeved on the base 12 of the magnetic drill 1, the sleeve 34 is pre-fixed at the first positioning screw hole 22 by the first locking bolt 35, the limit frame 31 is rotated to make the positioning ring 32 plug into the operating hole 21, and then the sleeve 34 is locked on the mounting plate 2 by the first locking bolt 35, so that the magnetic drill 1 can be locked in a direction parallel to the mounting plate 2; the pressure plate 41 locks the magnetic drill 1 in a direction perpendicular to the mounting plate 2 by the cooperation of the second locking bolt 42 and the second positioning screw hole 23, thereby reducing the possibility of the magnetic drill 1 being offset and detached, and improving the stability of the fixation of the magnetic drill 1.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic drill fixing mechanism for processing broken bolts, characterized in that: include The mounting plate is fixedly connected to the workpiece and is provided with an operating hole for the drill bit of the magnetic drill to pass through and align with the broken bolt; A first limiting member, used to limit the movement of the magnetic drill along the plane where the mounting plate is located; and The second limiter is used to limit the movement of the magnetic drill perpendicular to the plane where the mounting plate is located; The first limiting member and the second limiting member are both detachably connected to the mounting plate.

2. A magnetic drill fixing mechanism for processing broken bolts according to claim 1, characterized in that: The first limiting member includes a limiting frame and a positioning assembly. The inner contour of the limiting frame matches the peripheral contour of the magnetic drill base. The limiting frame is sleeved on the peripheral side of the magnetic drill base. The positioning assembly is arranged on the limiting frame and is used to position and fix the limiting frame so that the drill bit of the magnetic drill is located within the range of the operating hole.

3. A magnetic drill fixing mechanism for processing broken bolts according to claim 2, characterized in that: The positioning assembly comprises a positioning ring and a connecting piece. The positioning ring is arranged on a side of the limit frame close to the drill bit and is plugged with the mounting plate through the operating hole. The connecting piece is detachably connected to the mounting plate.

4. A magnetic drill fixing mechanism for treating broken bolts according to claim 3, characterized in that: The connecting member includes a connecting rod, a sleeve and a first locking bolt. One end of the connecting rod is connected to the side wall of the limit frame away from the positioning ring, and the other end is connected to the side wall of the sleeve. A first positioning screw hole is opened on the mounting plate. The sleeve is coaxially arranged with the first positioning screw hole. The first locking bolt passes through the sleeve and is threadedly connected to the mounting plate through the first positioning screw hole.

5. A magnetic drill fixing mechanism for treating broken bolts according to claim 4, characterized in that: The connecting rod includes a rod portion and a barrel portion which are coaxially arranged, one end of the rod portion is connected to the sleeve, the other end extends into the barrel portion and is slidably connected to the barrel portion, and the sliding direction is along its own length direction, one end of the barrel portion is connected to the limit frame, and the other end is coaxially rotatably provided with an adjusting nut, the rod portion is threadedly connected to the adjusting nut, the positioning ring is slidably connected to the limit frame, and the sliding direction is parallel to the sliding direction of the rod portion.

6. A magnetic drill fixing mechanism for treating broken bolts according to claim 4, characterized in that: The second limiting member includes a pressing plate and a second locking bolt. The pressing plate abuts against the top surface of the magnetic drill base. A second positioning screw hole is provided on the mounting plate. The second locking bolt passes through the pressing plate and is threadedly connected to the mounting plate through the second positioning screw hole.

7. A magnetic drill fixing mechanism for treating broken bolts according to claim 6, characterized in that: A waist-shaped hole is provided on the mounting plate, the direction of the waist-shaped hole is parallel to the sliding direction of the positioning ring, and the second positioning bolt is located in the waist-shaped hole.

8. A magnetic drill fixing mechanism for treating broken bolts according to claim 7, characterized in that: The mounting plate is provided with a plurality of groups of first positioning screw holes and second positioning screw holes.

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