A device for anchoring a down-the-hole drill bit

Abstract

The application discloses a kind of equipment for fixing teeth of down-the-hole drill bit, including structural frame, the structural frame is mounted for positioning drill bit tooth fixing tool, tooth fixing alignment feeding mechanism is arranged above tooth fixing tool, and pressure cylinder for pressing alloy tooth into drill bit is matched with tooth fixing alignment feeding mechanism, after the drill bit is fixed on tooth fixing tool, the area of the drill bit to be installed tooth hole is directly above the working area, the structural frame is mounted with rotating mechanism, the rotating mechanism includes vertically arranged rotating shaft and rotating disc coaxially mounted on rotating shaft and rotatable around rotating shaft, a plurality of stations are symmetrically arranged on rotating disc with rotating shaft as center, a type of tooth fixing alignment feeding mechanism is mounted on each station, and rotating disc sends a type of tooth fixing alignment feeding mechanism to the working area every time a station is rotated;The application solves the gap problem between alloy tooth and tooth hole after pressing tooth, and can greatly improve the quality of drill bit tooth fixing, thereby improving the reliability of down-the-hole drill bit.

Description

Technical Field

[0001] This invention relates to the field of track construction equipment technology, and in particular to a down-the-hole drill bit tooth fixing device. Background Technology

[0002] With the continuous development of mining engineering, construction, oil and water well engineering, pneumatic down-the-hole (DH) drilling technology has been widely used due to its high efficiency, high hole formation rate, and high stability. DH drill bits are a crucial component of this technology; they consist of a drill body and alloy teeth, which are inserted into the drill body via interference fitting. Therefore, the quality of the alloy teeth's attachment directly affects the lifespan of the drill bit. Currently, alloy teeth in DH drill bits are often attached using a cold extrusion process. During this process, misalignment between the alloy teeth and the drill bit is common, leading to pressure deviation or gaps after attachment. Based on these shortcomings, there is an urgent need for a highly efficient attachment device that provides accurate tooth hole alignment and is easy to operate. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a down-the-hole drill bit tooth fixing device that can achieve the positioning and fixing of alloy teeth with a single device, ensuring the quality of alloy tooth fixing.

[0004] To achieve the above objectives, the present invention first proposes a tooth fixing device for down-the-hole drill bits, comprising a structural frame, on which a tooth fixing fixture for positioning the drill bit is mounted, a tooth fixing alignment and feeding mechanism disposed above the tooth fixing fixture, and a pressure cylinder cooperating with the tooth fixing alignment and feeding mechanism for pressing alloy teeth into the drill bit. After the drill bit is fixed on the tooth fixing fixture, the area directly above the hole where the drill bit is to be installed with teeth is the working area. A rotating mechanism is mounted on the structural frame, the rotating mechanism comprising a vertically arranged rotating shaft and a rotating disk coaxially mounted on the rotating shaft and rotatable around the rotating shaft. Multiple workstations are symmetrically arranged on the rotating disk with the rotating shaft as the center, and a tooth fixing alignment and feeding mechanism of a certain type is installed on each workstation. Each time the rotating disk rotates one workstation, a tooth fixing alignment and feeding mechanism of a certain type is delivered to the working area.

[0005] The tooth-aligning feeding mechanism includes a pressure sleeve shaft, a pressure sleeve, and a pressing handle. The pressure sleeve is installed on the rotating disk. The pressure sleeve shaft is coaxially inserted into the cavity of the pressure sleeve, and the pressure sleeve shaft is slidably connected to the inner wall of the pressure sleeve. The cavity of the pressure sleeve is divided into a sliding section, a tooth-feeding section, and a pressing section from the inlet to the outlet. The diameter of the pressing section matches the outer diameter of the alloy tooth. The side wall of the pressure sleeve, in the tooth-feeding section, has a tooth-feeding opening that matches the size of the alloy tooth and communicates with the tooth-feeding section. The pressure sleeve shaft includes a shaft core with an outer diameter matching the diameter of the sliding section. One end of the shaft core is coaxially fixed with a positioning pressure head whose outer diameter matches the inner diameter of the tooth hole to be installed. The other end of the shaft core is coaxially fixed with a push head. The outer diameter of the pusher is larger than that of the pressure sleeve inlet. The pressing handle is connected to the pusher head of the pressure sleeve shaft. The pressing handle drives the pressure sleeve shaft to slide inside the pressure sleeve. The pressing handle drives the pressure sleeve shaft to switch between a positioning state and a waiting state. In the positioning state, the positioning pressure head of the pressure sleeve shaft extends from the outlet end of the pressure sleeve. At this time, by inserting the positioning pressure head into the tooth hole to be installed, the tooth hole to be installed is positioned before the alloy tooth is pressed in by aligning the axes. In the waiting tooth state, the positioning pressure head of the pressure sleeve shaft is placed above the tooth inlet section. At this time, the alloy tooth is inserted into the tooth inlet section from the tooth inlet, and then the pressure cylinder pushes the pressure sleeve shaft, thereby pushing the alloy tooth out from the pressure sleeve outlet and pressing it into the tooth hole to be installed.

[0006] In this embodiment, each station of the rotating disk is provided with a vertically arranged mounting hole that matches the outer diameter of the pressure sleeve. The pressure sleeve is inserted into the mounting hole of the rotating disk in a vertical direction, and the outer wall of the pressure sleeve is slidably connected to the inner wall of the mounting hole.

[0007] In this embodiment, the outer wall of the top of the pressure sleeve is provided with a retaining ring with an outer diameter larger than that of the mounting hole. The retaining ring limits the pressure sleeve and prevents it from falling out of the mounting hole.

[0008] In this embodiment, the end of the positioning pressure head is chamfered to form a guide area with an outer diameter smaller than the inner diameter of the tooth hole to be installed, so that the positioning pressure head can be easily pressed into the tooth hole to be installed through the guide area.

[0009] In this embodiment, the pressing handle is composed of a rectangular frame. One end of the pressing handle is hinged to the rotating disk, and the other end is the gripping end. The middle of the frame of the pressing handle is surrounded by two side plates to form a spacing that matches the diameter of the push head. The two side plates of the pressing handle are symmetrically provided with second guide grooves along the length of the side plates. The push head is threaded with screw stop pins on both sides. The push head is slidably installed in the second guide grooves on both sides by the screw stop pins on both sides. By lifting or pressing the gripping end of the pressing handle, the middle of the pressing handle rises or falls, so that the screw stop pins slide in the second guide grooves. By limiting the movement of the screw stop pins, the pressure sleeve shaft slides stably in the pressure sleeve.

[0010] In this embodiment, a limiting device is also provided between the pressure sleeve shaft and the pressure sleeve. The limiting device limits the distance that the pressure sleeve shaft can move upward along the axial direction within the pressure sleeve. The limiting device includes a first guide groove arranged axially on the inner wall of the sliding section of the pressure sleeve and a first positioning stop pin installed on the outer wall of the shaft core. The first positioning stop pin is slidably installed in the first guide groove. When the pressure sleeve moves upward along the axial direction to the limiting distance, the pressure sleeve shaft drives the pressure sleeve to move axially together through the limiting device, thereby causing the pressure sleeve to disengage from the mounting hole.

[0011] In this embodiment, the structural frame includes a bottom support platform, a top support platform, and a support column connecting the bottom support platform and the top support platform. A horizontal moving mechanism is installed on the bottom support platform, and a fixed gear tool is installed on the movable end of the horizontal moving mechanism. A lifting mechanism is installed on the support column, and a rotating mechanism is installed on the movable end of the lifting mechanism. A vertically arranged pressure cylinder is installed on the top support platform.

[0012] In this embodiment, the lifting mechanism includes a first guide rail fixed on the support column and arranged vertically, a crossbeam slidably mounted on the first guide rail, a suspension beam horizontally fixed on the crossbeam, and a tension cylinder mounted on the top support platform. The rotation shaft of the rotating mechanism is mounted on the suspension beam.

[0013] In this embodiment, the rotating mechanism includes a rotating shaft and a rotating disk. The suspension beam is provided with a vertically arranged inner hole that cooperates with the rotating shaft and a horizontally arranged locking threaded hole that communicates with the inner hole. A first set screw is installed in the internal thread of the locking threaded hole. One end of the rotating shaft is installed in the inner hole of the suspension beam, and the other end is rotatably connected to the rotating disk through a bearing. The rotating shaft is axially limited on the suspension beam by an anti-loosening nut and circumferentially limited by the first set screw. A ratchet mechanism is also provided between the rotating shaft and the rotating disk to realize the unidirectional rotation of the rotating disk.

[0014] In this embodiment, the horizontal moving mechanism includes a second guide rail fixed to the bottom support platform and arranged horizontally. The toothed fixture is slidably mounted on the second guide rail via a slider. The slider is equipped with a locking mechanism, and the slider is locked on the second guide rail by the locking mechanism. The horizontal moving mechanism enables the toothed fixture to move away from or towards the first guide rail.

[0015] Due to the above structure, the present invention has the following advantages:

[0016] (1) This invention uses a tooth-fixing and alignment feeding mechanism to switch between positioning and tooth-fixing states by cooperating with the pressure sleeve shaft and the pressure sleeve. In the positioning state, the positioning pressure head of the pressure sleeve shaft extends from the outlet end of the pressure sleeve. At this time, by inserting the positioning pressure head into the tooth hole to be installed, the tooth hole to be installed is positioned before the alloy tooth is pressed in by aligning the axes. In the tooth-fixing state, the positioning pressure head of the pressure sleeve shaft is placed above the tooth inlet section. Since the position of the alloy tooth pressing in has been positioned by the positioning pressure head, the alloy tooth is inserted into the tooth inlet section from the tooth inlet. Then, the pressure cylinder pushes the pressure sleeve shaft, thereby pushing the alloy tooth out from the outlet of the pressure sleeve and pressing it into the tooth hole to be installed. This completes the entire process of aligning and fixing the tooth holes on the drill bit tooth surface. By the above method, the problem of gaps between the alloy tooth and the tooth hole after tooth pressing is solved, greatly improving the tooth-fixing quality of the drill bit, thereby improving the reliability of the down-the-hole drill bit.

[0017] (2) The present invention utilizes a pressing handle to move the pressing sleeve shaft within the pressing sleeve. By lifting or pressing the gripping end of the pressing handle, the middle part of the pressing handle rises or falls, which makes it easy to control the sliding of the pressing sleeve shaft within the pressing sleeve and facilitates quick and easy switching between the positioning state and the tooth-to-be-fixed state.

[0018] (3) The present invention also provides a limiting device between the pressure sleeve shaft and the pressure sleeve. The limiting device limits the distance that the pressure sleeve shaft moves upward along the axial direction inside the pressure sleeve. The limiting device cooperates with the pressing handle. When the pressing handle is raised further, the pressure sleeve moves upward along the axial direction to the limiting distance. The pressure sleeve shaft drives the pressure sleeve to move along the axial direction together through the limiting device, thereby causing the pressure sleeve to disengage from the mounting hole. This makes it easy to remove the pressure sleeve, thereby facilitating the replacement of the fixed tooth alignment and feeding mechanism.

[0019] (4) The pressure sleeve of the present invention is provided with a tooth inlet. After the alloy tooth is fed into the pressure sleeve from the tooth inlet, the alloy tooth is pressed into the tooth hole to be installed under the action of the pressure cylinder and the pressure sleeve shaft. During the tooth fixing process, the alloy tooth is always in the pressure sleeve. The pressure sleeve replaces the original action of manually holding the alloy tooth and stabilizing the alloy tooth, and plays a guiding role for the alloy tooth throughout the process, which greatly improves the safety of workers during the tooth fixing process and prevents the equipment from crushing workers.

[0020] In summary, this structure is simple, easy to operate, and highly reliable; 1. It satisfies the alignment of each tooth hole on the down-the-hole drill bit's tooth surface; 2. It solves the problem of misalignment between the alloy teeth and the tooth holes during feeding; 3. It solves the problem of gaps between the alloy teeth and the tooth holes after pressing, which can greatly improve the quality of tooth fixing in the drill bit, thereby improving the reliability of the down-the-hole drill bit. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a sectional view of the side of the present invention;

[0023] Figure 3 This is a cross-sectional view of the rotating mechanism and the fixed-tooth alignment feeding mechanism of the present invention;

[0024] Figure 4 This is a cross-sectional view of the handle bracket of the present invention;

[0025] Figure 5 This is a top view of the pressing handle of the present invention;

[0026] Figure 6 This is a cross-sectional view of the tooth-fixing and feeding mechanism of the present invention;

[0027] Figure 7 This is a cross-sectional view of another structure of the tooth-fixing and alignment feeding mechanism of the present invention;

[0028] Figure 8 This is a perspective view of the pressure sleeve of the present invention;

[0029] Figure 9 This is a perspective view of the pressure sleeve shaft of the present invention;

[0030] Figure 10 This is a schematic diagram illustrating the positioning and tooth fixing process of this invention.

[0031] In the attached diagram: 1. Structural frame; 11. Bottom support platform; 12. Top support platform; 13. Pressure cylinder; 2. Lifting mechanism; 21. First guide rail; 22. Crossbeam; 23. Cantilever beam; 24. Tension cylinder; 3. Rotating mechanism; 31. Rotating shaft; 311. First set screw; 32. Rotating disk; 33. Anti-loosening nut; 34. Ratchet mechanism; 341. Ratchet groove; 342. Second set screw; 343. Spring; 344. Locating pin; 35. Bearing; 36. Bearing pad; 37. 4. Locking nut; 5. Gear-fixing and feeding mechanism; 6. Pressure sleeve shaft; 7. Screw stop pin; 8. Positioning pressure head; 9. Guide column; 10. Second positioning stop pin; 11. Shaft core; 12. Push head; 13. First positioning stop pin; 14. Pressure sleeve; 15. First guide groove; 16. Tooth inlet; 17. Upper sleeve; 18. Lower sleeve; 19. Handle bracket; 20. Pressing handle; 21. Second guide groove; 22. Gear-fixing fixture; 33. Horizontal moving mechanism; 44. Drill bit. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0034] like Figure 1-9 As shown, a down-the-hole drill bit tooth fixing device of the present invention includes a structural frame 1. The structural frame 1 is equipped with a tooth fixing fixture 5 for positioning the drill bit 7, a tooth fixing alignment and feeding mechanism 4 disposed above the tooth fixing fixture 5, and a pressure cylinder 13 cooperating with the tooth fixing alignment and feeding mechanism 4 for pressing alloy teeth into the drill bit 7. The structural frame 1 includes a bottom support platform 11, a top support platform 12, and a support column connecting the bottom support platform 11 and the top support platform 12. A horizontal moving mechanism 6 is installed on the bottom support platform 11, the tooth fixing fixture 5 is installed on the movable end of the horizontal moving mechanism 6, and a lifting mechanism 2 is installed on the support column. A rotating mechanism 3 is installed on the movable end of mechanism 2, and a vertically arranged pressure cylinder 13 is installed on the top support platform 12. The purpose of the tooth fixing fixture 5 is to fix the drill bit 7. The tooth fixing fixture 5 only limits the axial movement of the drill bit 7, and does not limit the circumferential rotation of the drill bit 7, so that the drill bit 7 can rotate around its central axis within the tooth fixing fixture 5. Multiple angle limiting holes are distributed on the tooth fixing fixture 5. The deflection angle of the drill bit 7 is fixed by inserting pins into the angle limiting holes. In this way, different tooth surface angle requirements can be met when fixing the teeth. Since the tooth fixing fixture 5 is the prior art, the present invention does not adjust the structure of the tooth fixing fixture 5 itself, and will not be described in detail here.

[0035] After the drill bit 7 is fixed on the tooth fixing fixture 5, the opening of the tooth hole to be installed on the drill bit 7 faces upward and the central axis of the tooth hole to be installed is vertically arranged. Let the area directly above the tooth hole to be installed at this time be the working area.

[0036] The rotating mechanism 3 includes a vertically arranged rotating shaft 31 and a rotating disk 32 coaxially mounted on the rotating shaft 31 and rotatable around the rotating shaft 31. Multiple workstations are symmetrically arranged on the rotating disk 32 with the rotating shaft 31 as the center. Each workstation is equipped with a fixed tooth alignment feeding mechanism 4 of a certain type. Every time the rotating disk 32 rotates to one workstation, it sends a fixed tooth alignment feeding mechanism 4 of a certain type into the working area.

[0037] The tooth-fixing and feeding mechanism 4 includes a pressure sleeve shaft 41, a pressure sleeve 42, and a pressing handle 44. Each station of the rotating disk 32 has a vertically arranged mounting hole. The pressure sleeve 42 is inserted vertically into the mounting hole of the rotating disk 32, and the outer wall of the pressure sleeve 42 is slidably connected to the inner wall of the mounting hole. Furthermore, the top outer wall of the pressure sleeve 42 is provided with a fixing ring with an outer diameter larger than the mounting hole. The fixing ring limits the pressure sleeve 42, preventing it from falling out of the mounting hole.

[0038] The pressure sleeve 42 has an inlet at the top, an outlet at the bottom, and an internal cavity. The pressure sleeve shaft 41 is coaxially inserted into the cavity of the pressure sleeve 42, and the shaft core 413 is slidably connected to the inner wall of the pressure sleeve 42.

[0039] The cavity of the pressure sleeve 42 is divided into a sliding section, a tooth inlet section, and a pressing section from the inlet to the outlet. The diameter of the pressing section matches the outer diameter of the alloy tooth. The side wall of the pressure sleeve 42, in the tooth inlet section, has a tooth inlet 422 matching the size of the alloy tooth, which communicates with the tooth inlet section. The pressure sleeve shaft 41 includes a shaft core 413 whose outer diameter matches the diameter of the sliding section. One end of the shaft core 413 is coaxially fixed with a positioning pressure head 412 whose outer diameter matches the inner diameter of the tooth hole to be installed. The other end of the shaft core 413 is coaxially fixed with a push head 414, whose outer diameter is larger than the inner diameter of the inlet of the pressure sleeve 42. The pressing handle 44 is connected to the push head 414 of the pressure sleeve shaft 41. The pressing handle 44 drives the pressure sleeve shaft 41 to slide within the pressure sleeve 42. The pressing handle 44 causes the pressure sleeve shaft 41 to switch between a positioning state and a waiting state. Figure 10 As shown, in the positioning state, the positioning head 412 of the pressure sleeve shaft 41 extends from the outlet end of the pressure sleeve 42. At this time, by inserting the positioning head 412 into the tooth hole to be installed, the tooth hole to be installed is positioned before the alloy tooth is pressed in by means of axis coincidence. In the tooth fixing state, the positioning head 412 of the pressure sleeve shaft 41 is placed above the tooth inlet section. At this time, the alloy tooth is inserted into the tooth inlet section from the tooth inlet 422, and then the pressure cylinder 13 pushes the pressure sleeve shaft 41, thereby pushing the alloy tooth out from the outlet of the pressure sleeve 42 and pressing it into the tooth hole to be installed.

[0040] The aforementioned multiple models of fixed-tooth alignment and feeding mechanisms refer to setting up a pressure sleeve shaft 41 that matches the different models of alloy teeth. The outer diameter of the pressure sleeve 42 can remain unchanged. In this way, when using it, only the fixed-tooth alignment and feeding mechanism 4 on the rotating mechanism 3 needs to be replaced.

[0041] Further, such as Figure 7 As shown, the pressure sleeve 42 includes an upper sleeve 423 and a lower sleeve 424 that are detachably connected, and the shaft core 413 of the pressure sleeve shaft 41 is also detachably connected to the positioning pressure head 412.

[0042] In this embodiment, the upper sleeve 423 and the lower sleeve 424 are connected to each other by threads. Since the diameters of the toothed section and the pressing section are the same, and the diameter of the sliding section is larger than the diameters of the toothed section and the pressing section, the sliding section is located in the upper sleeve, and the toothed section and the pressing section are located in the lower sleeve.

[0043] The top of the positioning head 412 is coaxially fixed with a guide post 4121, and the bottom of the shaft core 413 is coaxially provided with a slot that matches the guide post 4121. The outer circumferential wall of the shaft core 413 is provided with a threaded hole communicating with the slot along the radial direction. The positioning head 412 is inserted into the slot of the shaft core 413 through the guide post 4121, and the guide post 4121 is locked axially and circumferentially by a second positioning stop pin 4122 threaded in the threaded hole.

[0044] By making the pressure sleeve 42 and the pressure sleeve shaft 41 into a separate structure, on the one hand, different models of fixed tooth alignment and feeding mechanisms can be assembled simply by changing part of the structure according to the size of the alloy teeth. On the other hand, it is convenient to replace the vulnerable parts and to use different materials to make different parts.

[0045] Furthermore, the end of the positioning head 412 is chamfered to form a guide area with an outer diameter smaller than the inner diameter of the tooth hole to be installed, so that the positioning head 412 can be pressed into the tooth hole to be installed through the guide area.

[0046] like Figure 5 As shown, specifically, the pressing handle 44 is a rectangular frame. One end of the pressing handle 44 is hinged to the handle bracket 43, which is fixed to the rotating disk 32. The other end of the pressing handle 44 is the gripping end. The middle of the frame of the pressing handle 44 is enclosed by two side plates to form a sliding area with a spacing matching the diameter of the push head 414. The two side plates of the pressing handle 44 are symmetrically provided with second guide grooves 441 along the length of the side plates. The push head 414 is threaded with screw stop pins 411 on both sides. The push head 414 is slidably installed in the second guide grooves 441 on both sides by the screw stop pins 411 on both sides. By lifting or pressing the gripping end of the pressing handle 44, the middle of the pressing handle 44 rises or falls, so that the screw stop pins 411 slide in the second guide groove. By limiting the movement of the screw stop pins 411, the pressure sleeve shaft 41 slides in the pressure sleeve 42.

[0047] like Figure 6As shown, a limiting device is also provided between the pressure sleeve shaft 41 and the pressure sleeve 42. The limiting device limits the distance that the pressure sleeve shaft 41 can move upward along the axial direction within the pressure sleeve 42. When the pressure sleeve shaft 41 moves upward to the limit distance, the pressure sleeve shaft 41 drives the pressure sleeve 42 to move together along the axial direction through the limiting device, thereby causing the pressure sleeve 42 to disengage from the mounting hole. Specifically, the limiting device includes a first guide groove 421 arranged axially on the inner wall of the sliding section of the pressure sleeve 42 and a first positioning pin 415 installed on the outer wall of the shaft core 413. The first positioning pin 415 is slidably installed in the first guide groove 421.

[0048] like Figure 3 As shown, the lifting mechanism 2 includes a first guide rail 21 fixed on the support column and arranged vertically, a crossbeam 22 slidably installed on the first guide rail 21, a suspension beam 23 horizontally fixed on the crossbeam 22, and a tension cylinder 24 installed on the top support platform 12. The suspension beam 23 is provided with a pin hole connected to the tension cylinder 24. The tension cylinder 24 is hinged in the pin hole of the suspension beam 23, and the lifting of the suspension beam 23 is controlled by the tension cylinder 24.

[0049] The rotating mechanism 3 includes a rotating shaft 31 and a rotating disk 32. The suspension beam 23 has a vertically arranged inner hole that mates with the rotating shaft 31 and a horizontally arranged locking threaded hole communicating with the inner hole. A first set screw 311 is threaded into the locking threaded hole. One end of the rotating shaft 31 is installed in the inner hole of the suspension beam 23, and the other end is rotatably connected to the rotating disk 32 via a bearing 35. The rotating shaft 31 is axially limited on the suspension beam 23 by a lock nut 33 and circumferentially limited by the first set screw 311. A mechanism is also provided between the rotating shaft 31 and the rotating disk 32 to realize rotation... The rotating disk 32 has a unidirectional ratchet mechanism 34. The ratchet mechanism 34 includes a ratchet groove 341 on the rotating shaft 31, a threaded hole on the rotating disk 32 that matches the ratchet groove 341, and a second set screw 342 threaded into the threaded hole. The end of the second set screw 342 is connected to a positioning pin 344 via a spring 343. The positioning pin 344 abuts against the outer circumference of the ratchet groove 341 on the rotating shaft 31. A bearing 35 is fitted at the bottom of the rotating shaft 31, and the bearing 35 is pressed against the bottom of the rotating disk 32 by a locking nut 37.

[0050] The horizontal moving mechanism 6 includes a second guide rail fixed on the bottom support platform 11 and arranged horizontally. The tooth fixing fixture 5 is slidably mounted on the second guide rail by a slider. The slider is equipped with a locking mechanism to lock the relative position of the slider on the second guide rail. The horizontal moving mechanism 6 can also realize the movement of the tooth fixing fixture 5 away from or close to the first guide rail 21, so that the tooth fixing fixture 5 can move along the direction of the cantilever beam 23 below the tooth fixing and alignment feeding mechanism 4 to realize the initial adjustment of the drill bit position.

[0051] During installation, first place the central axis of the drill bit 7 vertically in the inner hole of the tooth fixing fixture 5. At this time, the tooth fixing fixture 5 only restricts the axial movement of the drill bit 7, but does not restrict the circumferential rotation of the drill bit 7, so that the drill bit 7 can rotate around its central axis within the tooth fixing fixture 5. In this way, when fixing the teeth, the tooth holes on the same tooth surface can be fixed by rotating the drill bit 7. Then, the pin is inserted into the corresponding angle limiting hole of the tooth fixing fixture 5 to limit the angle between the central axis of the drill bit 7 and the horizontal plane, so that the central axis of the tooth hole to be installed on the tooth fixing surface of the drill bit 7 is parallel to the pressure sleeve shaft 41.

[0052] Furthermore, the locking mechanism can be used in conjunction with the tooth-fixing and alignment feeding mechanism 4 for locking. For example, a sensor can be installed on the pressing handle 44. When the pressing handle 44 drives the pressure sleeve shaft 41 to the lowest position, the sensor sends a signal to the locking mechanism to lock the position of the tooth-fixing fixture 5 on the second guide rail. This achieves simultaneous positioning of the tooth-fixing and alignment feeding mechanism 4 and locking of the drill bit 7, making positioning simple and convenient. Of course, the locking mechanism can also be manually controlled. When the pressing handle 44 drives the pressure sleeve shaft 41 to the lowest position, the worker can manually lock it to achieve the same effect. After the tooth-fixing fixture 5 is locked by the horizontal moving mechanism 6, the tooth fixing of the tooth hole on the same tooth surface can be completed by rotating the drill bit 7.

[0053] Combination Figure 10 The entire operation process of the device is described as follows:

[0054] 1. First, install the drill bit 7 on the tooth fixing fixture 5. According to the tooth surface to be fixed on the drill bit 7, insert the pin into the corresponding angle limiting hole of the tooth fixing fixture 5 to limit the angle between the central axis of the drill bit 7 and the horizontal plane, so that the central axis of the tooth hole to be installed on the tooth fixing surface of the drill bit 7 is parallel to the pressure sleeve shaft 41. Then, move the tooth fixing fixture 5 along the second guide rail so that the central axis of the tooth hole to be installed is initially aligned with the central axis of the pressure sleeve shaft 41. Then, adjust the height of the tooth fixing alignment feeding mechanism 4 initially through the lifting mechanism 2.

[0055] 2. For example Figure 10 As shown in Figure a, lift and press the handle 44 to keep the pressure sleeve shaft 41 at a certain distance from the tooth surface. Manually rotate the drill bit 7 to make the tooth hole to be installed on the tooth surface approximately aligned with the pressure sleeve shaft 41.

[0056] 3. For example Figure 10As shown in Figure b, pressing down the pressing handle 44 causes the positioning pressing head 412 of the pressing sleeve shaft 41 to be inserted into the tooth hole to be installed. At this time, by rotating the drill bit and moving the tooth fixing fixture 5 back and forth on the second guide rail, the axis of the positioning pressing head 412 is aligned with the axis of the tooth hole to be installed. At the same time, the pressing handle 44 is pressed down further so that the positioning pressing head 412 is fully inserted into the tooth hole to be installed. Then, the locking device locks the position of the tooth fixing fixture 5 on the second guide rail. At this time, the positioning of the tooth fixing position is completed.

[0057] 4. For example Figure 10 As shown in Figure C, when the handle 44 is raised and pressed down, the pressure sleeve shaft 41 moves upward, causing the positioning pressure head 412 to rise above the inlet 422 of the pressure sleeve.

[0058] 5. For example Figure 10 As shown in Figure d, the alloy teeth are fed into the tooth inlet section of the pressure sleeve 42 from the tooth inlet 422;

[0059] 6. For example Figure 10 As shown in Figure e, when the handle 44 is pressed down, the pressure sleeve shaft 41 moves down. At this time, the pressure sleeve 42 is in contact with the tooth surface, and the pressure sleeve shaft initially presses the alloy tooth into the tooth hole to be installed and guides it.

[0060] 7. For example Figure 10 As shown in Figure f, when the pressure cylinder 13 is turned on, the pressure cylinder 13 presses down on the push head 414 of the pressure sleeve shaft 41. Under the pressure, the positioning head 412 of the pressure sleeve shaft 41 presses the alloy teeth into the tooth hole to be installed, thus completing the cold tooth insertion of the down-the-hole drill bit.

[0061] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A tooth fixing device for down-the-hole drill bits, comprising a structural frame (1), characterized in that: The structural frame (1) is equipped with a tooth fixing fixture (5) for positioning the drill bit (7), a tooth fixing alignment and feeding mechanism (4) set above the tooth fixing fixture (5), and a pressure cylinder (13) that cooperates with the tooth fixing alignment and feeding mechanism (4) for pressing the alloy teeth into the drill bit (7). After the drill bit (7) is fixed on the tooth fixing fixture (5), the area directly above the tooth hole to be installed on the drill bit is the working area. A rotating mechanism (3) is installed on the structural frame (1). The rotating mechanism (3) includes a vertically arranged rotating shaft (31) and a rotating disk (32) coaxially installed on the rotating shaft (31) and rotatable around the rotating shaft (31). Multiple workstations are symmetrically arranged on the rotating disk (32) with the rotating shaft (31) as the center. A tooth fixing and feeding mechanism (4) of a certain type is installed on each workstation. The rotating disk (32) sends a tooth fixing and feeding mechanism (4) of a certain type to the working area every time it rotates one workstation. The tooth-aligning feeding mechanism (4) includes a pressure sleeve shaft (41), a pressure sleeve (42), and a pressing handle (44). The pressure sleeve (42) is installed on the station of the rotating disk (32). The pressure sleeve shaft (41) is coaxially inserted into the pressure sleeve (42), and the pressure sleeve shaft (41) is slidably connected to the inner wall of the pressure sleeve (42). The pressure sleeve (42) is divided into a sliding section, a tooth-feeding section, and a pressing section along the axial direction from the inlet to the outlet. The pressing section matches the outer diameter of the alloy tooth. The side wall of the pressure sleeve (42) has a tooth-feeding port (422) that matches the size of the alloy tooth in the tooth-feeding section. The tooth-feeding port (422) communicates with the tooth-feeding section. The pressure sleeve shaft (41) includes a shaft core (413) whose outer diameter matches the diameter of the sliding section. 3) One end of the shaft core (413) is coaxially fixed with a positioning pressure head (412) whose outer diameter matches the inner diameter of the tooth hole to be installed. The other end of the shaft core (413) is coaxially fixed with a push head (414). The outer diameter of the push head (414) is larger than the inlet of the pressure sleeve (42). The pressing handle (44) is connected to the push head (414) of the pressure sleeve shaft (41). The pressing handle (44) drives the pressure sleeve shaft (41) to slide up and down in the pressure sleeve (42). The pressing handle (44) drives the pressure sleeve shaft (41) to switch between the positioning state and the waiting state. In the positioning state, the positioning pressure head (412) of the pressure sleeve shaft (41) extends out from the outlet end of the pressure sleeve (42). In the waiting tooth fixing state, the positioning pressure head (412) of the pressure sleeve shaft (41) is placed above the tooth inlet section.

2. The tooth fixing device for the down-the-hole drill bit (7) according to claim 1, characterized in that: Each station of the rotating disk (32) is provided with a vertically arranged mounting hole that matches the outer diameter of the pressure sleeve (42). The pressure sleeve (42) is inserted into the mounting hole of the rotating disk (32) in the vertical direction, and the outer wall of the pressure sleeve (42) is slidably connected to the inner wall of the mounting hole.

3. The tooth fixing device for the down-the-hole drill bit (7) according to claim 2, characterized in that: The top outer wall of the pressure sleeve (42) is provided with a fixing ring with an outer diameter larger than that of the mounting hole.

4. The tooth fixing device for the down-the-hole drill bit (7) according to claim 1, characterized in that: The end of the positioning pressure head (412) is chamfered to form a guide area with an outer diameter smaller than the inner diameter of the tooth hole to be installed.

5. The tooth fixing device for the down-the-hole drill bit (7) according to claim 1, characterized in that: The pressing handle (44) is made of a rectangular frame. One end of the pressing handle (44) is hinged to the rotating disk (32), and the other end is the gripping end. The middle part of the frame of the pressing handle (44) is surrounded by two side plates to form a distance that matches the diameter of the push head (414). The two side plates of the pressing handle (44) are symmetrically provided with second guide grooves (441) along the length of the side plates. The push head (414) is threaded with screw stop pins (411) on both sides. The push head (414) is slidably installed in the second guide grooves (441) on both sides through the screw stop pins (411) on both sides.

6. The tooth fixing device for the down-the-hole drill bit (7) according to claim 5, characterized in that: A limiting device is also provided between the pressure sleeve shaft (41) and the pressure sleeve (42). The limiting device limits the distance that the pressure sleeve shaft (41) moves upward along the axial direction in the pressure sleeve (42). The limiting device includes a first guide groove (421) arranged along the axial direction on the inner wall of the sliding section of the pressure sleeve (42) and a first positioning pin (415) installed on the outer wall of the shaft core (413). The first positioning pin (415) is slidably installed in the first guide groove (421).

7. The tooth fixing device for a down-the-hole drill bit (7) according to any one of claims 1 to 6, characterized in that: The structural frame (1) includes a bottom support platform (11), a top support platform (12), and a support column connecting the bottom support platform (11) and the top support platform (12). A horizontal moving mechanism (6) is installed on the bottom support platform (11), and a fixed gear tool (5) is installed on the movable end of the horizontal moving mechanism (6). A lifting mechanism (2) is installed on the support column, and a rotating mechanism (3) is installed on the movable end of the lifting mechanism (2). A vertically arranged pressure cylinder (13) is installed on the top support platform (12).

8. The tooth fixing device for the down-the-hole drill bit (7) according to claim 7, characterized in that: The lifting mechanism (2) includes a first guide rail (21) fixed on the support column and arranged vertically, a crossbeam (22) slidably installed on the first guide rail (21), a suspension beam (23) horizontally fixed on the crossbeam (22), and a tension cylinder (24) installed on the top support platform (12). The tension cylinder (24) is arranged vertically, and the movable end of the tension cylinder (24) is connected to the suspension beam (23). The rotation shaft (31) of the rotating mechanism (3) is installed on the suspension beam (23).

9. The tooth fixing device for the down-the-hole drill bit (7) according to claim 8, characterized in that: The rotating mechanism (3) includes a rotating shaft (31) and a rotating disk (32). The suspension beam (23) is provided with a vertically arranged inner hole that cooperates with the rotating shaft (31) and a horizontally arranged locking threaded hole that communicates with the inner hole. A first set screw (311) is installed in the internal thread of the locking threaded hole. One end of the rotating shaft (31) is installed in the inner hole of the suspension beam (23), and the other end is rotatably connected to the rotating disk (32) through a bearing (35). The rotating shaft (31) is axially limited on the suspension beam (23) by a lock nut (33) and circumferentially limited by the first set screw (311). A ratchet mechanism (34) is also provided between the rotating shaft (31) and the rotating disk (32) to realize the unidirectional rotation of the rotating disk (32).

10. The tooth fixing device for the down-the-hole drill bit (7) according to claim 7, characterized in that: The horizontal moving mechanism (6) includes a second guide rail fixed on the bottom support platform (11) and arranged horizontally. The tooth fixing fixture (5) is slidably mounted on the second guide rail by a slider. The slider is provided with a locking mechanism. The slider is locked on the second guide rail by the locking mechanism. The horizontal moving mechanism (6) realizes the action of the tooth fixing fixture (5) moving away from or closer to the first guide rail (21).

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