Quick release drill bit for a drill

Abstract

This invention relates to the field of drilling technology, specifically a quick-release drill bit for a drilling machine. It includes a connecting structure located at the bottom of the drilling machine and a drill bit structure located at the bottom of the connecting structure. The connecting structure is fixedly connected to the bottom of the drilling machine, while the drill bit structure is movably connected to the connecting structure, allowing for quick installation and removal of the drill bit structure within the connecting structure. The connecting structure includes a connecting cylinder located at the bottom of the drilling machine, which is fixedly connected to the drilling machine. A sliding cylinder is provided on the outer wall of the connecting cylinder, and the sliding cylinder is slidably connected to the outer wall of the connecting cylinder. This invention controls the radial extension and retraction of the stop block through the sliding cylinder, enabling quick locking and release of the drill rod with only one-handed push-pull operation. At the moment of drilling through the workpiece, the drill rod falls and automatically cuts off the feed force and torque, eliminating the risk of drill breakage due to a sudden increase in torque. Combined with an automatic upward sliding reset structure, it provides stable safety protection for the drill rod during continuous drilling cycles.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, and in particular to a quick-release drill bit for drilling machines. Background Technology

[0002] Drilling machines are widely used in industrial manufacturing and large-scale infrastructure construction. However, current drilling machine drill bit installation is cumbersome. First, the drill bit's shank must be aligned with the set screw of the bushing clamp, the shank inserted into the clamp, and then the drill bit screw tightened. This process is undoubtedly limiting and significantly reduces work efficiency. Therefore, a specialized drill bit that can be quickly disassembled and installed is needed. Furthermore, whether drilling metal workpieces or building materials, the moment the workpiece is drilled through, the sudden loss of bottom resistance means the operator's feed pressure cannot be simultaneously withdrawn, causing the drill bit to accelerate downwards momentarily—a phenomenon known as "drill bit jamming." At this moment, the torque on the drill bit increases sharply due to the sudden loss of resistance. If this exceeds the drill bit's torsional strength limit, it is highly susceptible to breakage.

[0003] Therefore, we need a drill bit that can be quickly removed and installed, and also one that can be relatively protected when drilling through the hole. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-release drill bit for drilling machines, which aims to solve the problem that drill bits in the prior art are prone to breakage when drilling through holes.

[0005] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes the following technical solution: a quick-release drill bit for a drilling machine, which includes a connecting structure disposed at the bottom of the drilling machine and a drill bit structure disposed at the bottom of the connecting structure; The connecting structure includes a connecting cylinder disposed at the bottom of the drilling machine, a sliding cylinder disposed on the outer wall of the connecting cylinder, and a stop block disposed on the inner wall of the connecting cylinder that cooperates with the sliding cylinder; The drill bit structure includes a drill rod disposed inside the connecting cylinder. The top of the drill rod has a connecting rod with an outer diameter smaller than that of the drill rod. The outer wall of the connecting rod has multiple abutment grooves. The top two sides of the abutment grooves have guide grooves. The top of the connecting rod has a boss. When the slide cylinder slides upward, it causes the abutment block to slide into the connecting cylinder to abut against the boss, so that the drill rod is installed inside the connecting cylinder. When the slide cylinder slides downward, it causes the abutment block to move away from the drill rod, so that the drill rod can be detached from the connecting cylinder. When drilling, the abutment block abuts against the bottom of the abutment groove to apply feed force and torque. When drilling through, the drill rod falls into the abutment groove, disengages from the abutment block, and no longer bears feed force and torque.

[0006] In a preferred embodiment of the quick-release drill bit for the drilling machine of the present invention: the drilling machine includes a drilling platform, a slide is provided on the top of the drilling platform, a slide bar is provided on the side of the slide, a motor is provided at one end of the slide bar that penetrates the slide, the bottom of the motor is connected to the connecting structure, a toothed groove is provided on the side of the slide bar, a gear is provided on the side of the toothed groove, and an operating lever is provided on the outer wall of the gear.

[0007] In a preferred embodiment of the quick-release drill bit for the drilling machine of the present invention: a first elastic element is provided inside the slide cylinder, a limiting ring is provided at the top of the first elastic element, the top of the first elastic element is fixedly connected to the limiting ring, a stepped ring is provided on the inner wall of the slide cylinder, the top of the stepped ring is connected to the first elastic element, an inclined surface is provided at the bottom of the inner wall of the slide cylinder, and a limiting flange is provided at the bottom of the slide cylinder.

[0008] In a preferred embodiment of the quick-release drill bit for the drilling machine of the present invention: a slide is provided on the outer wall of the connecting cylinder, the abutment is disposed on the surface of the slide, a receiving groove is provided on the inner side of the slide, a second elastic element is disposed inside the receiving groove, an ear block is disposed on the side of the abutment, and the ear block is connected to the second elastic element.

[0009] In a preferred embodiment of the quick-release drill bit for the drilling machine of the present invention: the inner wall of the connecting cylinder is provided with an upward sliding component that allows the drill rod to return to its original position after falling and disengaging.

[0010] In a preferred embodiment of the quick-release drill bit for the drilling machine of the present invention: the sliding component includes a receiving cylinder disposed inside the connecting cylinder, and a release spring is disposed inside the receiving cylinder, the top of the release spring being fixedly connected to the receiving cylinder.

[0011] In a preferred embodiment of the quick-release drill bit for drilling machines of the present invention, a magnet is provided inside the release spring.

[0012] In a preferred embodiment of the quick-release drill bit for the drilling machine of the present invention: the sliding component includes a folding spring piece disposed on the inner wall of the connecting cylinder, the inner wall of the connecting cylinder is provided with a slot, the folding spring piece is disposed in the slot, the side of the folding spring piece contacts the boss, and the side of the boss is provided with a wedge-shaped surface.

[0013] In a preferred embodiment of the quick-release drill bit for the drilling machine of the present invention: the folding spring includes a first V-shaped spring disposed in the upper part of the slot, and a second V-shaped spring is disposed at the bottom of the first V-shaped spring.

[0014] In a preferred embodiment of the quick-release drill bit for the drilling machine of the present invention: a blocking triangular block is provided inside the slot, and a limit rod is provided at the bottom of the blocking triangular block.

[0015] The beneficial effects of this invention are as follows: This invention controls the radial extension and retraction of the stop block by sliding the slide cylinder, and the drill rod can be quickly clamped and released with only one-handed push and pull operation. At the moment of drilling through the workpiece, the drill rod falls and automatically cuts off the feed force and torque, eliminating the hidden danger of drill breakage caused by sudden increase in torque. Combined with the automatic upward sliding and reset structure, it provides stable safety protection for the drill rod in continuous drilling cycle. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the drilling machine in this invention.

[0018] Figure 3 This is a schematic diagram of the connection structure in this invention.

[0019] Figure 4 This is a schematic diagram of the connecting cylinder in this invention.

[0020] Figure 5 This is a schematic diagram of the drill bit structure in this invention.

[0021] Figure 6 This is a schematic diagram of the structure of the magnet in this invention.

[0022] Figure 7 This is a schematic diagram of the release spring in this invention.

[0023] Figure 8 This is a schematic diagram of the structure of the receiving cylinder in this invention.

[0024] Figure 9 This is a schematic diagram of the folding spring sheet in this invention.

[0025] Figure 10 This is a schematic diagram of the card slot structure in this invention.

[0026] Figure 11 This is a schematic diagram of the structure of the first V-shaped spring in this invention.

[0027] Figure 12 This is a schematic diagram of the structure of the second V-shaped spring in this invention.

[0028] The components are as follows: 11. Drill platform; 12. Slide; 13. Slide bar; 14. Motor; 15. Gear groove; 16. Gear; 17. Operating lever; 2. Connecting structure; 3. Drill bit structure; 21. Connecting cylinder; 22. Slide cylinder; 23. Limiting flange; 24. First elastic element; 25. Limiting ring; 26. Abutment block; 27. Second elastic element; 211. Slide platform; 212. Receiving groove; 261. Ear block; 22. 1. Step ring; 222. Inclined surface; 31. Drill rod; 32. Connecting rod; 33. Groove; 34. Boss; 35. Guide groove; 341. Wedge-shaped surface; 4. Sliding component; 41. Drop spring; 42. Magnet; 411. Receiving cylinder; 43. Folding spring; 431. First V-shaped spring; 432. Second V-shaped spring; 213. Slot; 214. Blocking triangular block; 215. Limiting rod. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0030] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0031] Example 1, referring to Figures 1-12 This embodiment provides a quick-release drill bit for a drilling machine, including a connecting structure 2 disposed at the bottom of the drilling machine and a drill bit structure 3 disposed at the bottom of the connecting structure 2, such as... Figure 1 As shown, the connecting structure 2 is fixedly connected to the bottom of the drilling machine, and the drill bit structure 3 is movably connected to the connecting structure 2. The drill bit structure 3 can be quickly installed and quickly removed in the connecting structure 2. Connection structure 2 includes a connecting cylinder 21 disposed at the bottom of the drilling machine, such as Figure 3 As shown, the connecting cylinder 21 is fixedly connected to the drilling machine. The outer wall of the connecting cylinder 21 is provided with a sliding cylinder 22, which is slidably connected to the outer wall of the connecting cylinder 21. The sliding cylinder 22 can slide up and down on the outer wall of the connecting cylinder 21. The inner wall of the connecting cylinder 21 is provided with a stop block 26 that cooperates with the sliding cylinder 22. The stop block 26 is slidably connected to the connecting cylinder 21 and can slide inside the connecting cylinder 21. The drill bit structure 3 includes a drill rod 31 disposed inside the connecting sleeve 21, such as Figure 5As shown, the bottom of the drill rod 31 contacts the workpiece to drill a hole. A connecting rod 32 with an outer diameter smaller than the outer diameter of the drill rod 31 is provided at the top of the drill rod 31. The connecting rod 32 is fixedly connected to the drill rod 31. Multiple U-shaped grooves 33 are provided on the outer wall of the connecting rod 32. Guide grooves 35 with smooth outlines are provided on both sides of the top of each groove 33. The guide grooves 35 are connected end-to-end to form a whole surrounding the outer wall of the connecting rod 32. A boss 34 is provided at the top of the connecting rod 32 and is fixedly connected to the connecting rod 32. The abutment block 26 is connected to the connecting rod 32. When the inner wall of the cylinder 21 slides inward, it will protrude inside the connecting cylinder 21. When the abutment 26 moves away from the axis of the connecting cylinder 21, it will no longer protrude. When installing the drill rod 31, the drill rod 31 is first inserted into the connecting cylinder 21 until it reaches the boss 34 and is above the abutment 26. The sliding cylinder 22 slides downward, which will drive the abutment 26 to slide into the connecting cylinder 21 to abut the boss 34 so that the drill rod 31 is installed inside the connecting cylinder 21. When removing the drill rod 31, the sliding cylinder 22 slides upward, which will cause the abutment 26 to move away from the drill rod 31. At this time, pulling the drill rod 31 downward can remove the drill rod 31 from the connecting cylinder 21. During drilling, the abutment block 26 presses against the bottom of the abutment groove 33, applying feed force and torque. During drilling, the bottom of the drill rod 31 presses against the surface of the workpiece, applying pressure to the connecting cylinder 21, causing the abutment block 26 to move towards the bottom of the abutment groove 33 until the bottom of the abutment block 26 contacts the bottom of the abutment groove 33. The pressure on the connecting cylinder 21 then becomes the feed force for drilling. At this time, the motor 14 drives the connecting cylinder 21 to rotate, which in turn drives the drill rod 31 to rotate for drilling. When drilling is complete, the drill rod 31 falls down, disengaging from the abutment groove 33 and no longer bearing feed force and torque. When the workpiece is drilled through, the bottom of the drill rod 31 is no longer subjected to feed force from the workpiece. With the support of the drill bit 31, the drill rod 31 will move downward relative to the connecting cylinder 21. The abutment block 26 will come to the upper part of the groove 33 and the lower part of the boss 34. The drill rod 31 is hung in the connecting cylinder 21 by the abutment block 26 through the boss 34. At this time, the drill rod 31 is no longer subject to the feed force. Even if the motor 14 continues to rotate, it cannot transmit the torque to the drill rod 31. Thus, the drill rod 31 is protected. Since the feed force is cut off in time and the torque is also cut off, the occurrence of "knife jamming" phenomenon will be greatly reduced. Moreover, the torque on the drill bit will not suddenly increase beyond the torsional strength limit of the drill bit due to the sudden loss of resistance.

[0032] Furthermore, the drilling machine includes a drill table 11, such as Figure 2As shown, the drill rig 11 is fixedly mounted above the workpiece to be processed. A slide 12 is mounted on the top of the drill rig 11 and is fixedly connected to the drill rig 11. A slide bar 13 is mounted on the side of the slide bar 12, allowing it to slide. A motor 14 is mounted at one end of the slide bar 13 that penetrates the slide bar 12, and the slide bar 13 is fixedly connected to the motor 14. The bottom of the motor 14 is connected to the connecting structure 2. Rotation of the motor 14 will cause the connecting structure 2 to rotate. A toothed groove 15 is formed on the side of the slide bar 13. A gear 16 is provided, which meshes with a toothed groove 15. An operating lever 17 is provided on the outer wall of the gear 16, and the operating lever 17 is fixedly connected to the gear 16. Rotating the operating lever 17 will drive the gear 16 to rotate, thereby causing the slide bar 13 to slide up and down. As a result, the motor 14 slides up and down on the side of the drill table 11. When drilling, rotating the operating lever 17 will drive the motor 14 to move downward, applying a feed force to the drill rod 31 to drill. When drilling is completed, rotating the operating lever 17 will drive the motor 14 to move upward, removing the drill rod 31 from the workpiece.

[0033] Furthermore, the interior of the slide 22 is provided with a first elastic element 24, such as... Figure 4 As shown, the first elastic element 24 can be a spring. A limiting ring 25 is provided at the top of the first elastic element 24, and the top of the first elastic element 24 is fixedly connected to the limiting ring 25. A stepped ring 221 is provided on the inner wall of the slide cylinder 22. The top of the stepped ring 221 is connected to the first elastic element 24, and the top of the stepped ring 221 is fixedly connected to the first elastic element 24. An inclined surface 222 is provided at the bottom of the inner wall of the slide cylinder 22. A limiting flange 23 is provided at the bottom of the slide cylinder 22. The limiting flange 23 is fixed to the outer wall of the connecting cylinder 21, and the limiting flange 23 restricts the bottom position of the slide cylinder 22.

[0034] Furthermore, a slide 211 is provided on the outer wall of the connecting cylinder 21, such as... Figure 5As shown, the abutment 26 is disposed on the surface of the slide 211. The abutment 26 can move on the slide 211 close to the axis of the connecting cylinder 21, and the abutment 26 can move on the slide 211 away from the axis of the connecting cylinder 21. The inner side of the slide 211 is provided with a receiving groove 212. The receiving groove 212 is provided with a second elastic element 27, which can be a spring. One end of the spring is fixed inside the receiving groove 212. The second elastic element 27 is in a compressed state. The side of the abutment 26 is provided with an ear block 261, which is connected to the second elastic element 27. When it is necessary to confine the drill rod 31 in the connecting cylinder 21, the bottom of the slide cylinder 22 contacts the limiting flange 23. The inside of the slide cylinder 22 will abut against the abutment 26. The inside of the abutment 26 extends out of the inside of the connecting cylinder 21, which will restrict the drill rod 31 from moving downward to disengage from the connecting cylinder 21. The first elastic element 24 will press the slide cylinder 26. The bottom of the slide 22 is always in contact with the limiting flange 23. When the drill rod 31 needs to be removed, simply push the slide 22 upward. The first elastic element 24 will continue to be compressed, and a receiving space will be formed below the inclined surface 222 at the bottom of the inner wall of the slide 22. At this time, under the pushing force of the second elastic element 27, the abutment 26 will enter this receiving space and will no longer restrict the downward sliding of the drill rod 31. At this time, simply pull the drill rod 31 downward to remove the drill bit. When released, under the elastic force of the first elastic element 24, the slide 22 will be pushed towards the limiting flange 23, and the inclined surface 222 will push the abutment 26 towards the axis of the connecting cylinder 21. When the drill rod 31 needs to be installed, simply push the slide 22 upward to allow the abutment 26 to enter the receiving space of the slide 22, push the drill rod 31 into the connecting cylinder 21, and then release the slide 22 so that the abutment 26 can lock the drill rod 31 in the connecting cylinder 21.

[0035] Usage: When using this drilling machine with quick-release drill bit, first push the slide 22 to release the restraint of the stop block 26. After inserting the drill rod 31 into the connecting cylinder 21, release the slide 22. The stop block 26, under the action of the elastic element, abuts against the boss 34 of the drill rod 31 to complete the installation. During drilling, rotate the operating lever 17 to make the motor 14 drive the connecting cylinder 21 to move down. The stop block 26 applies pressure to the abutment groove 33 of the drill rod 31 to transmit the feed force. The motor 14 rotates and transmits torque through the connecting cylinder 21. The drill rod 31 cuts the workpiece. When drilling is completed, the workpiece support force disappears, the drill rod 31 moves down and disengages from the stop block 26, the feed force and torque are cut off, and the drill rod 31 is caught by the boss 34 to prevent breakage. When it is necessary to remove the drill bit, push the slide 22 again to make the stop block 26 return to the receiving space, and pull down the drill rod 31 to remove it, realizing the functions of quick installation and drilling protection.

[0036] Example 2, refer to Figures 1-12 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a structure that allows the drill rod 31 to move upwards and reset after drilling is completed, such as... Figure 5As shown, the inner wall of the connecting cylinder 21 is provided with an upward sliding component 4 that allows the drill rod 31 to return to its original position after falling and disengaging. After the drilling machine drills through the workpiece, the drill rod 31 will move downward, and the groove 33 on the drill rod 31 will disengage from the block 26. At this time, the upward sliding component 4 will cause the drill rod 31 to move upward. Due to the inertia of the drill rod 31, it will continue to rotate slowly. During the upward sliding process of the drill rod 31, guided by the guide groove 35, the block 26 will slide into the groove 33 for the next drilling.

[0037] Furthermore, the sliding member 4 includes a receiving cylinder 411 disposed inside the connecting cylinder 21, such as... Figure 6 As shown, the receiving cylinder 411 is fixedly connected to the top of the connecting cylinder 21. A release spring 41 is installed inside the receiving cylinder 411, with its top fixedly connected to the receiving cylinder 411. A magnet 42 is installed inside the release spring 41. The release spring 41 is made of non-magnetic metal, while the boss 34 is made of magnetic metal. The top of the magnet 42 is fixedly connected to the receiving cylinder 411. The drill rod 31 is generally hung in the connecting cylinder 21. The entire structure is as follows... Figure 6 As shown, at this time, the abutment block 26 is located above the abutment groove 33. The rotation of the connecting cylinder 21 will drive the abutment block 26 to rotate, which in turn drives the drill rod 31 to rotate. The top of the boss 34 is in contact with the release spring 41. The compression stroke of the release spring 41 is short, and the drill rod 31 is in a state of force balance in the vertical direction. The weight of the drill rod 31 itself and the downward pressure of the release spring 41 are equal to the attraction force of the magnet 42. When drilling is performed using a drilling machine, rotating the operating lever 17 causes the connecting cylinder 21 to move downward. The connecting cylinder 21 presses the drill rod 31 downward. At this time, the entire structure is as follows: Figure 7 As shown, the bottom of the groove 33 on the drill rod 31 contacts the bottom of the block 26. At this time, the block 26 applies a feed force to the drill rod 31, and the connecting cylinder 21 also transmits torque to the drill rod 31 through the block 26. The release spring 41 has a long compression stroke and a large elastic force. When the workpiece is drilled through, the weight of the drill rod 31 itself, the pressure of the connecting cylinder 21 on the drill rod 31, and the elastic force of the release spring 41 will cause the drill rod 31 to move downward. The drill rod 31 disengages from the release spring 41, causing the groove 33 to disengage from the block 26. The block 26 will then contact the bottom of the boss 34. At this time, the entire structure is as follows. Figure 8 As shown, due to the rotational inertia of drill rod 31, it will continue to rotate slowly. Since drill rod 31 is only subject to its own gravity at this time, magnet 42 will attract drill rod 31, causing it to slide upwards. At the same time, drill rod 31 is still rotating. Under the action of guide groove 35, abutment groove 33 will fit onto abutment block 26, so drill rod 31 will stop rotating and return to its original position. Figure 6 Once the drill rod 31 returns to a balanced state in the vertical direction, it can proceed with the next drilling operation.

[0038] Usage: When using the quick-release drill bit on the drilling machine, in the initial state, the drill rod 31 is attracted by the magnet 42 via the boss 34 and is below the release spring 41 of the receiving cylinder 411. At this time, the abutment block 26 is located above the abutment groove 33, and the drill rod 31 is stably suspended due to the balance between the attraction of the magnet 42, its own weight, and the spring force. During drilling, rotating the operating lever 17 causes the connecting cylinder 21 to move downwards, and the bottom of the abutment block 26 contacts the bottom of the abutment groove 33 of the drill rod 31. The abutment block 26 transmits the feed force and torque, and the release spring 41 is compressed to accommodate the feed force and torque. Drill rod 31 is pressed down; when the workpiece is drilled through, drill rod 31 loses the support force of the workpiece and moves downward to disengage from block 26 under its own weight, the pressure of connecting cylinder 21 and the elastic force of release spring 41. At this time, boss 34 disengages from release spring 41, magnet 42 attracts boss 34 and makes drill rod 31 slide upward. Due to inertia, drill rod 31 continues to rotate slowly. Guide groove 35 on inner wall of connecting cylinder 21 guides block 26 to slide into groove 33. Drill rod 31 returns to the initial suspended state, completing one drilling cycle and preparing for the next operation.

[0039] Example 3, referring to Figures 1-12 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides an upper sliding component 4, which is different from that in embodiment 2. The upper sliding component 4 includes a folding spring piece 43 disposed on the inner wall of the connecting cylinder 21. The folding spring piece 43 is in the shape of a "3". The inner wall of the connecting cylinder 21 is provided with a slot 213. The folding spring piece 43 is disposed in the slot 213. The upper and lower ends of the folding spring piece 43 are fixedly connected to the slot 213. The middle bend of the "3" shaped spring piece contacts the inner wall of the slot 213. The middle bend of the "3" shaped spring piece can slide on the inner wall of the slot 213. The side of the folding spring piece 43 contacts the boss 34. The side of the boss 34 is provided with a wedge-shaped surface 341.

[0040] Furthermore, the folding spring 43 includes a first V-shaped spring 431 disposed in the upper part of the slot 213, and a second V-shaped spring 432 disposed at the bottom of the first V-shaped spring 431, such as... Figure 9 As shown, the first V-shaped spring 431 and the second V-shaped spring 432 are fixedly connected, and the folding spring 43 is composed of the first V-shaped spring 431 and the second V-shaped spring 432.

[0041] Furthermore, a blocking triangular block 214 is provided inside the slot 213. The blocking triangular block 214 is fixedly connected to the slot 213 and contacts the bottom of the first V-shaped spring piece 431. A limiting rod 215 is provided at the bottom of the blocking triangular block 214. The limiting rod 215 is located on the same horizontal plane as the middle inflection point of the second V-shaped spring piece 432. When the drill rod 31 is generally hung in the connecting cylinder 21, the entire structure is as follows: Figure 10As shown, the middle inflection point of the second V-shaped spring 432 contacts the bottom of the inclined surface 222 of the boss 34. At this time, the second V-shaped spring 432 hangs the drill rod 31 inside the connecting cylinder 21, while the abutment block 26 is located at the upper part of the abutment groove 33. The rotation of the connecting cylinder 21 will drive the abutment block 26 to rotate, which in turn drives the drill rod 31 to rotate. When drilling is performed using a drilling machine, rotating the operating lever 17 will cause the connecting cylinder 21 to move downward, and the connecting cylinder 21 will press the drill rod 31 downward. At this time, the entire structure is as follows. Figure 11 As shown, the bottom of the groove 33 on the drill rod 31 contacts the bottom of the block 26. At this time, the block 26 applies a feed force to the drill rod 31, and the connecting cylinder 21 also transmits torque to the drill rod 31 through the block 26. The bottom of the first V-shaped spring 431 is also subjected to the upward pressure of the boss 34. As a result, the first V-shaped spring 431 is compressed and slides the second V-shaped spring 432 upward. The inflection point of the second V-shaped spring 432 will be received inside the slot 213, and the bottom of the first V-shaped spring 431 will move above the blocking triangle 214. When the workpiece is drilled through, the drill rod 31 will fall. At this time, the entire structure is as follows. Figure 12 As shown, the top of the boss 34 contacts the top of the abutment 26, while the inflection point of the second V-shaped spring 432 contacts the wedge-shaped surface 341. The folding action will cause the spring to return, and the inflection point of the second V-shaped spring 432 will move towards the axis of the connecting cylinder 21, pushing the boss upwards and causing the drill rod 31 to move upwards. Thus, the entire structure returns to its original position. Figure 10 The state is set so that the next drilling can proceed.

[0042] Usage: When drilling with a quick-release drill bit, in the initial state, the drill rod 31 contacts the bottom of the inclined surface 222 of the boss 34 through the middle inflection point of the second V-shaped spring 432, and is hung in the connecting cylinder 21 by the folded spring 43. At this time, the abutment block 26 is located above the abutment groove 33 of the drill rod 31. The rotation of the connecting cylinder 21 drives the abutment block 26 to rotate, which in turn drives the drill rod 31 to rotate together. During drilling, rotating the operating lever 17 causes the connecting cylinder 21 to move downward, and the bottom of the abutment groove 33 of the drill rod 31 contacts the bottom of the abutment block 26. The abutment block 26 transmits the feed force and torque. At the same time, the boss 34 presses the first V-shaped spring 431 upward. The first V-shaped spring 431 is compressed and drives the second V-shaped spring 432 to move upward. Sliding upwards, the bottom of the first V-shaped spring 431 moves to above the blocking triangular block 214, keeping the drill rod 31 pressed down to complete the drilling; when the workpiece is drilled through, the drill rod 31 loses the support force of the workpiece and falls down. At this time, the boss 34 contacts the top of the abutment block 26, the middle inflection point of the second V-shaped spring 432 contacts the wedge surface 341 of the boss 34, the folding spring 43 springs back, the inflection point moves in the direction of the axis of the connecting cylinder 21, pushing the boss 34 upwards, driving the drill rod 31 to move upwards, the middle inflection point of the second V-shaped spring 432 contacts the bottom of the inclined surface 222 of the boss 34 again, the abutment block 26 returns to the upper part of the abutment groove 33, the drill rod 31 returns to the initial suspended state, completing one drilling cycle and preparing for the next operation.

[0043] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A quick-release drill bit for a drilling machine, characterized in that: include, The connecting structure (2) is located at the bottom of the drilling machine and the drill bit structure (3) is located at the bottom of the connecting structure (2). The connecting structure (2) includes a connecting cylinder (21) disposed at the bottom of the drilling machine. The outer wall of the connecting cylinder (21) is provided with a sliding cylinder (22), and the inner wall of the connecting cylinder (21) is provided with a stop block (26) that cooperates with the sliding cylinder (22). The drill bit structure (3) includes a drill rod (31) disposed inside the connecting cylinder (21). A connecting rod (32) with an outer diameter smaller than the outer diameter of the drill rod (31) is disposed at the top of the drill rod (31). Multiple abutment grooves (33) are disposed on the outer wall of the connecting rod (32). Guide grooves (35) are disposed on both sides of the top of the abutment grooves (33). A boss (34) is disposed at the top of the connecting rod (32). The upward sliding of the sliding cylinder (22) will drive the abutment block (2... 6) Slide the tube (21) into the connecting cylinder (21) to abut the boss (34) so ​​that the drill rod (31) is installed inside the connecting cylinder (21). The sliding cylinder (22) slides down and drives the abutment block (26) away from the drill rod (31) so that the drill rod (31) can be detached from the connecting cylinder (21). When drilling, the abutment block (26) abuts against the bottom of the abutment groove (33) to apply feed force and torque. When drilling through, the drill rod (31) falls into the abutment groove (33) and disengages from the abutment block (26) and no longer bears feed force and torque.

2. The quick-release drill bit for a drilling machine as described in claim 1, characterized in that: The drilling machine includes a drilling platform (11), a slide (12) is provided on the top of the drilling platform (11), a slide bar (13) is provided on the side of the slide bar (12), a motor (14) is provided at one end of the slide bar (13) penetrating the slide bar (12), the bottom of the motor (14) is connected to the connecting structure (2), a toothed groove (15) is provided on the side of the slide bar (13), a gear (16) is provided on the side of the toothed groove (15), and an operating rod (17) is provided on the outer wall of the gear (16).

3. The quick-release drill bit for a drilling machine as described in claim 2, characterized in that: The slide cylinder (22) is provided with a first elastic element (24) inside. A limiting ring (25) is provided at the top of the first elastic element (24). The top of the first elastic element (24) is fixedly connected to the limiting ring (25). A stepped ring (221) is provided on the inner wall of the slide cylinder (22). The top of the stepped ring (221) is connected to the first elastic element (24). An inclined surface (222) is provided at the bottom of the inner wall of the slide cylinder (22). A limiting flange (23) is provided at the bottom of the slide cylinder (22).

4. The quick-release drill bit for a drilling machine as described in claim 3, characterized in that: The outer wall of the connecting cylinder (21) is provided with a slide (211), the abutment (26) is provided on the surface of the slide (211), the inner side of the slide (211) is provided with a receiving groove (212), the inside of the receiving groove (212) is provided with a second elastic member (27), the side of the abutment (26) is provided with an ear block (261), and the ear block (261) is connected to the second elastic member (27).

5. The quick-release drill bit for a drilling machine as described in claim 4, characterized in that: The inner wall of the connecting cylinder (21) is provided with an upper sliding component (4) that allows the drill rod (31) to return to its original position after falling and disengaging.

6. The quick-release drill bit for a drilling machine as described in claim 5, characterized in that: The sliding member (4) includes a receiving cylinder (411) disposed inside the connecting cylinder (21), and a release spring (41) is disposed inside the receiving cylinder (411). The top of the release spring (41) is fixedly connected to the receiving cylinder (411).

7. The quick-release drill bit for a drilling machine as described in claim 6, characterized in that: A magnet (42) is provided inside the release spring (41).

8. The quick-release drill bit for a drilling machine as described in claim 7, characterized in that: The sliding member (4) includes a folding spring piece (43) disposed on the inner wall of the connecting cylinder (21). The inner wall of the connecting cylinder (21) is provided with a slot (213). The folding spring piece (43) is disposed in the slot (213). The side of the folding spring piece (43) is in contact with the boss (34). The side of the boss (34) is provided with a wedge-shaped surface (341).

9. The quick-release drill bit for a drilling machine as described in claim 8, characterized in that: The folding spring (43) includes a first V-shaped spring (431) disposed in the upper part of the slot (213), and a second V-shaped spring (432) is disposed at the bottom of the first V-shaped spring (431).

10. The quick-release drill bit for a drilling machine as described in claim 9, characterized in that: The card slot (213) is provided with a blocking triangular block (214) inside, and a limit rod (215) is provided at the bottom of the blocking triangular block (214).

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