A punching drill bit capable of enlarging the diameter of a hole

Abstract

The present invention relates to the field of low-carbon mining perforating drills, and discloses a perforating drill bit capable of expanding the diameter of a hole, comprising a hammer body, a vertical slide groove is provided inside the hammer body, an upper slide groove, a lower slide groove and a horizontal slide groove are provided through the side wall of the vertical slide groove, and a hammer foot, wherein the hammer foot is four and the four hammer feet are arranged at four diagonal positions of the hammer body. Compared with the prior art, the present application can move the position of the hammer foot by fixing the steel wire rope of the impact drill on the hanging ears at different positions, thereby adjusting the distance between the hammer foot and the hammer body, and realizing the diameter change of the impact drilling drill bit, so that the drill bit of the impact drill can open mining holes of different diameters, making the drill bit of the drilling rig more flexible and changeable.

Description

Technical Field

[0001] The invention relates to the field of low-carbon mining punching drills, in particular to a punching drill drill bit capable of expanding the diameter of a drill hole. Background Art

[0002] Low-carbon mining is an effort to follow the principles of green industry in the circular economy, forming a mining technology that is in harmony with the environment and strives to achieve low mining, high utilization and low emissions. For example, in the mining process of oil wells, natural gas, etc., it is necessary to adhere to the principle of low-carbon mining. In the mining process of oil wells, natural gas, etc., it is necessary to punch holes at the mining locations. Generally, impact drills are used to punch holes at designated locations.

[0003] Punching is to use an impact drill to raise a heavy drill bit with a drill blade (also called a hammer), and rely on the impact force of free fall to cut the rock layer and discharge the debris to form a hole. Impact drills are of two types: drill rod type and wire rope type. The former has a smaller hole diameter, lower efficiency, and is less used. The latter has a larger hole diameter. The size of the drill bit can be modified according to the designed pile diameter. The hammer weight is 3000kg-10000kg.

[0004] In the prior art, when punching holes, the impact drill is placed at a designated location, the drill bit is hoisted by a wire rope, and the designated location is punched by dropping the drill bit. The drill bit continuously impacts the same location to open the hole to a designated depth, so that the impacted hole reaches the depth required for mining. However, depending on the mining situation, drill bits of different specifications need to be used.

[0005] In order to cope with the above situation, each manufacturer generally produces drill holes of different specifications and replaces drill bits of different specifications on the impact drill rigs so that the impact drill rigs can open mining holes of different diameters. However, in actual use, since the mining holes to be opened need to be surveyed and measured to determine the diameter of the mining holes to be opened, it is necessary to carry multiple impact drill bits of different specifications when punching holes.

[0006] As we all know, the drill bit of an impact drill is relatively heavy. Therefore, when replacing the drill bit of an impact drill, a lifting equipment is required to move the drill bit to the bottom of the wire rope of the impact drill, and then fix the wire rope of the impact drill bit to the lifting lug of the drill bit. However, there are certain risks in the process of lifting and replacing the drill bit, such as the breaking of the lifting rope, or the collision of the hoisted drill bit with the staff due to different operations during the lifting process.

[0007] After massive searches, it was found that the prior art publication number is CN105696945B, which discloses a punching drill bit that can expand the diameter of the drilling hole, including a hammer body, a hammer foot, a top cone, a top cone base, a connecting rod, and a connecting rod baffle; the hammer body has a hole A, and the top cone has multiple holes B; the upper end of each hammer foot is hinged to the hammer body, and each hammer foot can rotate along the hinge point, the upper end of the top cone is fixed to the lower end of the connecting rod, the lower end of the top cone is fixed to the upper end of the top cone base, the upper end of the connecting rod is fixed to the connecting rod baffle, the diameter of the connecting rod baffle is larger than the diameter of the hole A of the hammer body, and the rod body of the connecting rod passes through the hole A of the hammer body.

[0008] Therefore, based on the above search and in combination with the existing punching method, the four hammer feet are simply pushed through the hinge point by the top cone to flip over. At that time, the flipping angle of the hammer feet is fixed, and the position of the hammer feet cannot be adjusted according to the punching needs. When the mined hole is smaller or larger than the flipping angle of the hammer feet, the punching work cannot be completed, and the drill bit of the impact drill still needs to be replaced. Based on the above problems, the present application proposes a punching drill bit that can expand the drilling diameter. Summary of the invention

[0009] In view of the deficiencies in the prior art, the present invention provides a punching drill bit capable of expanding the diameter of a hole, which has the advantages of, and solves a series of problems.

[0010] To achieve the above object, the present invention provides the following technical solution: a punching drill bit capable of expanding the diameter of a hole, comprising:

[0011] A hammer body, wherein a vertical slide groove is provided inside the hammer body, and an upper slide groove, a lower slide groove and a horizontal slide groove are provided through the side wall of the vertical slide groove;

[0012] Hammer feet, there are four hammer feet, and the four hammer feet are arranged at four diagonal positions of the hammer body;

[0013] A hammer foot adjustment component is installed inside the vertical slide slot for adjusting the hammer foot. The hammer foot adjustment component includes a vertical moving rod arranged inside the vertical slide slot, a mounting groove is provided at the bottom of the vertical moving rod, a return spring is fixedly provided on the upper side wall of the mounting groove, and the bottom of the return spring is fixedly installed on the lower side wall of the vertical slide slot, a receiving groove is provided on one side of the vertical moving rod, an upper hanging ear is provided inside the receiving groove, an elastic flipping member is provided between the upper hanging ear and the receiving groove, and the vertical moving rod is provided with a plurality of springs. A transverse moving part is provided on one side of the moving rod, and the transverse moving part includes a wedge block fixedly installed on the side of the vertical moving rod, a T-shaped slider is fixedly provided on the inclined surface of the wedge block, a wedge plate is overlapped on the inclined surface of the wedge block, the hammer foot is fixedly installed on the side of the wedge plate away from the hammer body, a T-shaped groove is provided on the inclined surface of the wedge plate, the T-shaped slider is slidably arranged in the T-shaped groove, a positioning hole is penetrated on the front side of the wedge plate, and a locking part is provided on the surface of the wedge plate for locking the position of the wedge plate.

[0014] Preferably, the elastic flip member includes a mounting shaft fixedly mounted inside the storage groove, the upper hanging ear is rotatably set on the surface of the mounting shaft, a reset coil spring is installed on the surface of the mounting shaft, one end of the reset coil spring is fixedly mounted on the upper hanging ear, and the other end of the reset coil spring is fixedly mounted inside the storage groove.

[0015] Preferably, the locking member includes a rectangular locking frame overlapped on the surface of the wedge plate, the rectangular locking frame is fixedly mounted on the hammer body, both side walls of the rectangular locking frame are respectively penetrated with an insertion groove and a limiting slot, a locking rod is slidably arranged inside the insertion groove, the locking rod is slidably connected to the positioning socket, a movable ring is slidably arranged on the surface of the locking rod, a fixed ring is fixedly arranged on the surface of the locking rod, and a locking spring is connected between the fixed ring and the movable ring.

[0016] Preferably, the length of the T-shaped sliding groove is the same as the height of the lower sliding groove, the length of the upper sliding groove is half of the height of the lower sliding groove, and the height of the upper sliding groove is greater than the length of the upper hanging ear.

[0017] Compared with the prior art, the present invention provides a punching drill bit that can expand the drilling diameter, which has the following beneficial effects:

[0018] 1. A punching drill bit capable of expanding the diameter of a hole, by fixing the steel wire rope of the impact drill on the hanging ears at different positions, the position of the hammer foot can be moved, thereby adjusting the distance between the hammer foot and the hammer body, and realizing the diameter change of the impact drilling drill bit. At the same time, during the use of the impact drill bit, there is no need to replace the drill bit of the impact drill bit. The steel wire rope of the impact drill is fixed from the initial hanging ear to the upper hanging ear or the lower hanging ear in sequence, and the diameter change process of the impact drill bit can be completed.

[0019] 2. A punching drill bit that can expand the diameter of a hole, through an elastic flipping piece, when the steel wire rope of the impact drill is fixed on the lower hanging ear, during the upward movement of the vertical moving rod, the upper sliding groove will push the upper hanging ear to flip to the inside of the storage groove, so that when the steel wire rope is fixed on the lower hanging ear, the drill bit of the impact drill can be automatically changed in diameter, and after the lower hanging ear is reset, the elastic flipping piece can pop out the upper hanging ear from the inside of the storage groove, so that the upper hanging ear can be automatically stored and popped out, thereby realizing automatic diameter change of the impact drill drill.

[0020] 3. A punching drill bit capable of expanding the diameter of a hole drilled, by locking the position of the wedge plate through a locking member after the hammer foot is adjusted, the position of the hammer foot can be locked through the wedge plate, so that during the drilling process, the distance between the hammer foot and the hammer body will not change, thereby fixing the drilling diameter of the impact drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic longitudinal cross-sectional view of the three-dimensional structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the hammer foot and the hammer foot adjustment component of the present invention;

[0024] Figure 4 It is a longitudinal cross-sectional schematic diagram of the hammer foot adjustment component of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the elastic flip member of the present invention;

[0026] Figure 6 It is a longitudinal cross-sectional schematic diagram of the transverse moving member of the present invention;

[0027] Figure 7 It is a schematic diagram of the locking member structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the elastic cleaning member of the present invention;

[0029] Fig. 9 It is a schematic diagram of the local structure of the elastic cleaning member of the present invention;

[0030] Fig.10 This is a schematic diagram of the three-dimensional structure positioning jack structure of the present invention;

[0031] Fig.11 It is a schematic diagram of the structure of the three-dimensional structure extension member of the present invention;

[0032] Fig.12It is a schematic longitudinal cross-sectional view of the three-dimensional structural extension member of the present invention.

[0033] In the figure: 1, hammer body; 2, hammer foot; 3, vertical slide groove; 4, upper slide groove; 5, lower slide groove; 6, horizontal slide groove; 7, hammer foot adjustment component; 71, vertical moving rod; 72, mounting groove; 73, reset spring; 74, storage groove; 75, elastic flip member; 751, mounting shaft; 752, reset coil spring; 76, upper hanging ear; 77, lower hanging ear; 78, horizontal moving member; 781, wedge block; 782, T-shaped slider; 783, wedge plate; 784, T-shaped slide groove; 78 5. Positioning socket; 79. Locking piece; 791. Rectangular locking frame; 792. Insertion slot; 793. Limiting slot; 794. Locking rod; 795. Moving ring; 796. Fixed ring; 797. Locking spring; 798. Elastic cleaning piece; 7981. Mounting block; 7982. Mounting cross bar; 7983. Mounting sleeve; 7984. Cleaning plate; 7985. Limiting coil spring; 8. Adjusting slot; 9. Positioning hole; 10. Adjusting plate; 11. Limiting hole; 12. Fixing pin. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0035] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a punching drill bit that can expand the drilling diameter.

[0036] In a typical implementation of the present application, Figure 1-6 As shown, a punching drill bit capable of expanding the diameter of a hole, comprising:

[0037] A hammer body 1, a vertical slide groove 3 is provided inside the hammer body 1, an upper slide groove 4, a lower slide groove 5 and a horizontal slide groove 6 are provided through the side wall of the vertical slide groove 3, and also includes hammer feet 2, four hammer feet 2, and the four hammer feet 2 are arranged at four diagonal positions of the hammer body 1, and the hammer body 1 and the hammer feet 2 are the main structure of the drill bit, which are used for punching holes by falling impact;

[0038] A hammer foot adjustment component 7 is installed inside the vertical slide groove 3 for adjusting the hammer foot 2. The hammer foot adjustment component 7 includes a vertical moving rod 71 arranged inside the vertical slide groove 3. A mounting groove 72 is provided at the bottom of the vertical moving rod 71. A return spring 73 is fixedly provided on the upper side wall of the mounting groove 72. The bottom of the return spring 73 is fixedly installed on the lower side wall of the vertical slide groove 3. A receiving groove 74 is provided on one side of the vertical moving rod 71. An upper hanging ear 76 is provided inside the receiving groove 74. An elastic flip member 75 is provided between the upper hanging ear 76 and the receiving groove 74. The elastic flip member 75 includes a mounting groove 72 fixedly installed inside the receiving groove 74. The mounting shaft 751, the upper hanging ear 76 is rotatably arranged on the surface of the mounting shaft 751, a reset coil spring 752 is installed on the surface of the mounting shaft 751, one end of the reset coil spring 752 is fixedly arranged on the upper hanging ear 76, and the other end of the reset coil spring 752 is fixedly arranged inside the storage groove 74, a lateral moving member 78 is arranged on one side of the vertical moving rod 71, and the lateral moving member 78 includes a wedge block 781 fixedly arranged on the side of the vertical moving rod 71, a T-shaped sliding block 782 is fixedly arranged on the inclined surface of the wedge block 781, and a wedge plate 783 is overlapped on the inclined surface of the wedge block 781, and the hammer foot 2 is fixedly arranged on the side of the wedge plate 783 away from the hammer body 1, and the wedge plate A T-shaped slide groove 784 is provided on the inclined surface 783, and the length of the T-shaped slide groove 784 is the same as the height of the lower slide groove 5, the length of the upper slide groove 4 is half of the height of the lower slide groove 5, and the height of the upper slide groove 4 is greater than the length of the upper hanging ear 76, which is convenient for realizing multi-diameter adjustment of the drill bit of the impact drill and avoids the upper slide groove 4 blocking the upper hanging ear 76 from popping out of the storage groove 74. The T-shaped slider 782 is slidably arranged inside the T-shaped slide groove 784, and a positioning hole 785 is penetrated on the front side of the wedge plate 783. A locking piece 79 is provided on the surface of the wedge plate 783 for locking the position of the wedge plate 783. By The steel wire rope is fixed on the upper hanging ear 76 or the lower hanging ear 77, and the vertical moving rod 71 is driven to move upward through the upper hanging ear 76 or the lower hanging ear 77. The wedge block 781 pushes the wedge plate 783 to extend from the inside of the hammer body 1 through the T-shaped slider 782 and the T-shaped slide groove 784, so that the distance between the hammer foot 2 and the hammer body 1 can be adjusted, so that the drill bit of the impact drill can be changed in diameter. When the lower hanging ear 77 moves, the upper sliding groove 4 pushes the upper hanging ear 76 to be flipped and stored in the storage groove 74, and after the reset spring 73 pulls the vertical moving rod 71 to reset, the upper hanging ear 76 is ejected from the inside of the storage groove 74 through the reset coil spring 752.

[0039] It is worth mentioning that during the use of the upper hanging ear 76 and the lower hanging ear 77, the wire rope is fixed to the upper hanging ear 76 or the lower hanging ear 77 from the initial hanging ear in sequence, so that the drill bit of the impact drill can be changed in diameter without removing the drill.

[0040] As a preferred implementation in this embodiment, refer to Figure 7The locking member 79 includes a rectangular locking frame 791 overlapped on the surface of the wedge plate 783, the rectangular locking frame 791 is fixedly installed on the hammer body 1, and the two side walls of the rectangular locking frame 791 are respectively penetrated with an insertion groove 792 and a limiting slot 793, a locking rod 794 is slidably arranged inside the insertion groove 792, the locking rod 794 is slidably connected with the positioning socket 785, a moving ring 795 is slidably arranged on the surface of the locking rod 794, a fixed ring 796 is fixedly arranged on the surface of the locking rod 794, and a locking spring 797 is connected between the fixed ring 796 and the moving ring 795. The position of the wedge plate 783 can be locked by the locking member 79, that is, the position of the hammer foot 2 can be locked by the wedge plate 783, so that the distance between the hammer foot 2 and the hammer body 1 will not change during the use of the drill bit.

[0041] Embodiment 2:

[0042] Please refer to Figure 8-9 The difference between this embodiment and the above-mentioned embodiment 1 is that an elastic cleaning member 798 is provided on the side of the rectangular locking frame 791 away from the hammer body 1, and the elastic cleaning member 798 includes a mounting block 7981 fixedly installed on the side of the rectangular locking frame 791 away from the hammer body 1, and a mounting cross bar 7982 is fixedly provided between the facing surfaces of the mounting block 7981, and a mounting sleeve 7983 is rotatably provided on the surface of the mounting cross bar 7982, and a cleaning plate 7984 is fixedly provided on the surface of the mounting sleeve 7983, and a limiting coil spring 7985 is provided on the surface of the mounting cross bar 7982, and one end of the limiting coil spring 7985 is fixedly provided on the cleaning plate 79 84, the other end of the limit coil spring 7985 is fixedly installed on the rectangular locking frame 791. When the wedge plate 783 is retracted to the inside of the hammer body 1, the gravel attached to the wedge plate 783 is scraped off by the cleaning plate 7984, and the limit coil spring 7985 gives the cleaning plate 7984 a thrust, so that the cleaning plate 7984 can scrape off the fine gravel attached to the wedge plate 783, avoiding the fine gravel from entering the inside of the hammer body 1 and accumulating, thereby avoiding the situation that the accumulated fine gravel causes the vertical moving rod 71 to be unable to reset, thereby ensuring the normal extension and retraction of the wedge plate 783, thereby ensuring the normal adjustment of the hammer foot 2.

[0043] Embodiment three:

[0044] Please refer to Fig.10The difference between this embodiment and the above-mentioned embodiment 1 is that the number of positioning holes 785 is several, and the several positioning holes 785 are distributed in a linear array. The positioning holes 785 are composed of circular sliding holes and rectangular sliding holes. By setting several linear array positioning holes 785, when the wire rope is fixed on the lower hanging ear 77, when the lower hanging ear 77 moves in the lower sliding groove 5, it can be inserted into different positioning holes 785 according to the distance moved by the lower hanging ear 77 in the lower sliding groove 5, and the lower hanging ear 77 can realize multi-path adjustment of the drill bit of the impact drill.

[0045] Embodiment 4:

[0046] Please refer to Figure 11-12 The difference between this embodiment and the above-mentioned embodiment 1 is that an extension piece is arranged inside the wedge plate 783, and the extension piece includes an adjustment slot 8 opened on the right side of the wedge plate 783, and an adjustment plate 10 is slidably arranged inside the adjustment slot 8. A limiting hole 11 is penetrated through the top of the adjustment plate 10, and a fixing pin 12 is overlapped and arranged inside the limiting hole 11. A positioning hole 9 for inserting the fixing pin 12 is penetrated through the top of the wedge plate 783. When the wire rope of the impact drill is fixed to the initial hanging ear at the top of the hammer body 1, the hammer foot 2 is pulled to drive the adjustment plate 10 to slide out of the adjustment slot 8, so that the positioning holes 11 at different positions on the adjustment plate 10 are vertically aligned with the limiting hole 9, and the fixing pin 12 is inserted into the limiting hole 9 and the positioning hole 11, so that the distance between the hammer foot 2 and the hammer body 1 can be adjusted, so that the distance adjustment between the hammer foot 2 and the hammer body 1 is more variable, so that the drill bit of the impact drill can open more mining holes with different diameters.

[0047] The working principle of the present invention is as follows: when in use, the steel wire rope of the impact drill is fixed on the upper hanging ear 76 or the lower hanging ear 77 according to the diameter of the mining hole. When the steel wire rope of the impact drill is fixed on the lower hanging ear 77, the steel wire rope is wound up by the impact drill, and the lower hanging ear 77 is pulled by the steel wire rope to slide upward inside the lower sliding groove 5, and the vertical moving rod 71 is driven to slide upward inside the vertical sliding groove 3 through the lower hanging ear 77, so that the vertical moving rod 71 stretches the return spring 73 inside the installation groove 72, so that the vertical moving rod 71 drives the wedge block 781 to move upward, and drives the T-shaped sliding block 782 to slide in the T-shaped sliding groove 784 through the wedge block 781, and the inclined surface of the wedge plate 783 is pushed by the inclined surface of the wedge block 781, so that the wedge plate 783 is moved out of the horizontal sliding groove 6, and the hammer foot 2 is pushed away from the hammer body 1 through the wedge plate 783;

[0048] The upper sliding groove 4 pushes the upper hanging ear 76 to rotate on the surface of the mounting shaft 751, and pushes the return coil spring 752 to contract through the upper hanging ear 76, so that the upper hanging ear 76 contracts to the inside of the storage groove 74, and the lower hanging ear 77 can continue to slide upward inside the lower sliding groove 5. When the lower hanging ear 77 contacts the top of the lower sliding groove 5, the top of the T-shaped sliding block 782 contacts the upper side wall of the T-shaped sliding groove 784, and the hammer body 1 is driven to rise through the lower hanging ear 77;

[0049] The locking rod 794 is inserted into the groove 792, enters the positioning hole 785 through the insertion groove 792, and then is inserted into the limiting slot 793 through the positioning hole 785, so that the locking rod 794 is moved out of the limiting slot 793. During this process, the rectangular locking frame 791 pushes the moving ring 795 to approach the fixed ring 796, so that the moving ring 795 compresses the locking spring 797, and the rotating fixed ring 796 drives the locking rod 794 to rotate nine Ten degrees, so that the locking end of the locking rod 794 is aligned with the vertical notch of the limiting slot 793, and the locking rod 794 is pulled to drive the rotating locking rod 794 to be reinserted into the limiting slot 793. At this time, the locking end of the locking rod 794 contacts the rear side of the wedge plate 783, and the wedge plate 783 can be locked, thereby locking the position of the hammer foot 2. After the locking rod 794 is reinserted into the limiting slot 793, the locking spring 797 is still in a compressed state;

[0050] When the locking cam 752 is in the closed position, the locking cam 752 is in the closed position, and the locking cam 752 is in the closed position, so that the locking cam 752 is in the closed position, and the locking cam 752 is in the closed position, so that the locking cam 752 is in the closed position, and the locking cam 752 is in the closed position, so that the locking cam 752 is in the closed position, and the locking cam 752 is in the closed position, so that the locking cam 752 is in the closed position, and the locking cam 752 is in the closed position, so that the locking cam 752 is in the closed position, and the locking cam 752 is in the closed position, so that the locking cam 752 is in the closed position, and the locking cam 752 is in the closed position,

[0051] The steel wire rope is fixed on the upper hanging ear 76, and the upper hanging ear 76 drives the vertical moving rod 71 to stretch the reset spring 73, so that the wedge block 781 pushes the wedge plate 783 out of the hammer body 1 through the T-shaped slider 782 and the T-shaped slide groove 784. When the top of the upper hanging ear 76 contacts the upper side wall of the upper slide groove 4, the T-shaped slider 782 slides to the middle position of the T-shaped slide groove 784, and then the position of the wedge plate 783 is locked by the locking piece 79.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A punching drill bit capable of enlarging the diameter of a hole, characterized in that: include, A hammer body (1), wherein a vertical slide groove (3) is provided inside the hammer body (1), and an upper slide groove (4), a lower slide groove (5) and a horizontal slide groove (6) are provided through the side wall of the vertical slide groove (3); Hammer feet (2), there are four hammer feet (2), and the four hammer feet (2) are arranged at four diagonal positions of the hammer body (1); A hammer foot adjustment component (7), the hammer foot adjustment component (7) is installed inside the vertical slide groove (3) and is used to adjust the hammer foot (2). The hammer foot adjustment component (7) comprises a vertical movable rod (71) arranged inside the vertical slide groove (3). A mounting groove (72) is provided at the bottom of the vertical movable rod (71). A return spring (73) is fixedly provided on the upper side wall of the mounting groove (72). The bottom of the return spring (73) is fixedly installed on the lower side wall of the vertical slide groove (3). A receiving groove (74) is provided on one side of the vertical movable rod (71). An upper hanging ear (76) is provided inside the receiving groove (74). An elastic flip member (75) is provided between the upper hanging ear (76) and the receiving groove (74). A horizontal The lateral moving member (78) comprises a wedge block (781) fixedly mounted on the side of the vertical moving rod (71); a T-shaped slider (782) is fixedly mounted on the inclined surface of the wedge block (781); a wedge plate (783) is overlapped on the inclined surface of the wedge block (781); the hammer foot (2) is fixedly mounted on a side of the wedge plate (783) away from the hammer body (1); a T-shaped slide groove (784) is formed on the inclined surface of the wedge plate (783); the T-shaped slider (782) is slidably mounted inside the T-shaped slide groove (784); a positioning socket (785) is penetrated on the front side of the wedge plate (783); and a locking member (79) is provided on the surface of the wedge plate (783) for locking the position of the wedge plate (783).

2. A punching drill bit capable of expanding the drilling diameter according to claim 1, characterized in that: The elastic flip member (75) comprises a mounting shaft (751) fixedly mounted inside the storage groove (74); the upper hanging ear (76) is rotatably mounted on the surface of the mounting shaft (751); a return coil spring (752) is mounted on the surface of the mounting shaft (751); one end of the return coil spring (752) is fixedly mounted on the upper hanging ear (76); and the other end of the return coil spring (752) is fixedly mounted inside the storage groove (74).

3. The punching drill bit capable of expanding the drilling diameter according to claim 1, characterized in that: The locking member (79) comprises a rectangular locking frame (791) overlapped on the surface of the wedge plate (783), the rectangular locking frame (791) being fixedly mounted on the hammer body (1), the two side walls of the rectangular locking frame (791) being respectively penetrated by an insertion groove (792) and a limit slot (793), a locking rod (794) being slidably arranged inside the insertion groove (792), the locking rod (794) being slidably connected to the positioning socket (785), a moving ring (795) being slidably arranged on the surface of the locking rod (794), a fixed ring (796) being fixedly arranged on the surface of the locking rod (794), and a locking spring (797) being connected between the fixed ring (796) and the moving ring (795).

4. The punching drill bit capable of expanding the drilling diameter according to claim 1, characterized in that: The length of the T-shaped sliding groove (784) is the same as the height of the lower sliding groove (5), the length of the upper sliding groove (4) is half the height of the lower sliding groove (5), and the height of the upper sliding groove (4) is greater than the length of the upper hanging ear (76).

5. The punching drill bit capable of expanding the drilling diameter according to claim 3, characterized in that: An elastic cleaning member (798) is provided on the side of the rectangular locking frame (791) away from the hammer body (1), and the elastic cleaning member (798) includes a mounting block (7981) fixedly mounted on the side of the rectangular locking frame (791) away from the hammer body (1), a mounting cross bar (7982) is fixedly mounted between the facing surfaces of the mounting block (7981), a mounting sleeve (7983) is rotatably mounted on the surface of the mounting cross bar (7982), a cleaning plate (7984) is fixedly mounted on the surface of the mounting sleeve (7983), and a limiting coil spring (7985) is provided on the surface of the mounting cross bar (7982), one end of the limiting coil spring (7985) is fixedly mounted on the top of the cleaning plate (7984), and the other end of the limiting coil spring (7985) is fixedly mounted on the rectangular locking frame (791).

6. A punching drill bit capable of expanding the diameter of a hole according to claim 5, characterized in that: The cleaning plate (7984) is arranged obliquely, and the bottom of the cleaning plate (7984) is an inclined surface, and the inclined surface of the bottom of the cleaning plate (7984) contacts the top of the wedge plate (783).

7. The punching drill bit capable of expanding the drilling diameter according to claim 1, characterized in that: The number of the positioning holes (785) is several, and the several positioning holes (785) are distributed in a linear array, and the positioning holes (785) are composed of circular sliding holes and rectangular sliding holes.

8. The punching drill bit capable of expanding the drilling diameter according to claim 1, characterized in that: An extension piece is arranged inside the wedge-shaped plate (783), and the extension piece includes an adjustment slot (8) opened on the right side of the wedge-shaped plate (783), an adjustment plate (10) is slidably arranged inside the adjustment slot (8), a limiting hole (11) is arranged through the top of the adjustment plate (10), a fixing pin (12) is overlapped and arranged inside the limiting hole (11), and a positioning hole (9) for inserting the fixing pin (12) is arranged through the top of the wedge-shaped plate (783).

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