A high-rigidity drill bit
By designing anti-wear structures such as sliding sleeves, ball bearings, buffer springs, and damping pads on high-rigidity drill bits, the wear problem caused by the collision between the drill bit connecting shank and the plate material is solved, thereby improving the quality and precision of the workpiece.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU FANGCHENG TOOLS CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-06-30
AI Technical Summary
Existing high-rigidity drill bits cause the connecting shank to collide with the surface of the plate at the moment of penetration, resulting in scratching and wear, which affects the appearance quality and machining accuracy of the workpiece.
A high-rigidity drill bit was designed, employing anti-wear structures such as sliding sleeves, ball bearings, buffer springs, and damping pads. The ball bearings reduce friction by contacting the plate, while the buffer springs and damping pads buffer impact forces, preventing the connecting shank from directly contacting the plate and causing wear.
It effectively reduces wear when the drill bit penetrates the plate, improving the appearance quality and machining accuracy of the workpiece.
Smart Images
Figure CN224424349U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of drill bit technology, and in particular to a high-rigidity drill bit. Background Technology
[0002] In the field of mechanical processing and manufacturing engineering, drilling is a high-frequency operation that plays a key role in the shaping of workpieces. To meet the requirements of high-strength use, drill bits are usually made of high-strength alloy steel, titanium alloy and other high-rigidity materials, which makes the drill bits highly rigid. These materials have excellent compressive strength and wear resistance, which can ensure that the drill bits can operate stably under complex working conditions and significantly extend the service life of the drill bits.
[0003] During drilling operations, depending on the production scenario, the high-rigidity drill bit is connected to a handheld drill or an automated drill via a connecting shank. The drill drives the drill bit to rotate at high speed, bringing it into contact with the surface of the material. With the help of cutting force, the drill gradually penetrates the material to complete the drilling task.
[0004] However, when existing high-rigidity drill bits are used in conjunction with handheld drills, the operator applies force to drill holes in the sheet metal. Due to inertia and continuous force, the drill bit will continue to move forward after it penetrates the sheet metal and loses the resistance of the sheet metal. At this time, the drill bit connecting shank will collide with the surface of the sheet metal, and the rotating connecting shank will also cause scratches and wear on the surface of the sheet metal, affecting the appearance quality and processing accuracy of the workpiece. Utility Model Content
[0005] The purpose of this application is to provide a high-rigidity drill bit to solve the problem that when the drill bit passes through the plate, the drill bit connecting shank collides with the plate surface and the rotating connecting shank also causes scratches and wear on the plate surface, affecting the appearance quality and processing accuracy of the workpiece.
[0006] To achieve the above objectives, this application specifically adopts the following technical solution:
[0007] A high-rigidity drill bit includes a connecting shank, one end of which has a connecting groove, a drill rod portion fixed to the end of the connecting shank away from the connecting groove, and a drill head portion fixed to the end of the drill rod portion away from the handle. Both the drill rod portion and the drill head portion have thread cutting grooves, and the drill rod portion portion is provided with an anti-wear structure.
[0008] By adopting the above technical solution, when using this drill bit, the connecting shank is connected to the handheld drill. Then, the user holds the handheld drill, aligns the drill bit with the position on the board where a hole needs to be drilled, and applies force to the handheld drill so that the drill bit passes through the board and completes the drilling. After the drill bit passes through the hole, the wear-resistant structure can effectively reduce the problem of wear on the board surface caused by the connecting shank due to inertia and the user's continuous force.
[0009] Furthermore, the wear-resistant structure includes a sliding sleeve that is slidably sleeved on the drill rod portion. The end of the sliding sleeve near the drill head has a movable groove. An abutment block is slidably disposed inside the movable groove. A first ball bearing is rotatably connected to the end of the abutment block away from the sliding sleeve. A connecting component and a pre-fixing component are provided between the sliding sleeve and the drill rod portion.
[0010] By adopting the above technical solution, after the drill bit passes through the plate to be drilled, the ball bearings will come into contact with the plate. During the rotation of the drill rod, the sliding sleeve rotates with the drill rod. At this time, the ball bearings rotate, thereby reducing the problem of wear caused to the plate by the connecting shank directly contacting the plate during rotation.
[0011] Furthermore, a buffer spring is fixed to the end of the abutment block away from the first ball, and the end of the buffer spring away from the abutment block extends into the movable groove and is fixedly connected to the sliding sleeve.
[0012] By adopting the above technical solution, when the contact block is subjected to force and moves into the movable groove, it will squeeze the buffer spring, and the buffer spring can buffer the force on the contact block.
[0013] Furthermore, a connecting sleeve is fixed to the bottom of the movable groove, and a sliding column is slidably arranged inside the connecting sleeve. The end of the sliding column away from the connecting sleeve is fixedly connected to the abutment block. The buffer spring is slidably sleeved on the connecting sleeve and the sliding column. A damping pad is fixed on the sliding column, and the damping pad is in contact with the inner wall of the connecting sleeve.
[0014] By adopting the above technical solution, when the contact block is forced to move into the movable groove, the sliding column is forced to move into the connecting sleeve. At this time, the damping pad is squeezed, which can slow down the rebound speed of the buffer spring and improve the buffering effect of the buffer spring.
[0015] Furthermore, the connecting assembly includes two connecting posts threaded onto the sliding sleeve, and the sliding sleeve has two symmetrically arranged mounting grooves inside. One end of each connecting post extends into the mounting groove and is rotatably connected to a connecting block. The connecting block fits into the mounting groove and is slidably arranged with the mounting groove.
[0016] By adopting the above technical solution, the connecting column is turned so that it drives the connecting block to move toward the drill pipe, thereby realizing the connection between the sliding sleeve and the drill pipe.
[0017] Furthermore, a reinforcing strip is fixed to the side of the connecting block, and the surface of the reinforcing strip is rough.
[0018] By adopting the above technical solution, the reinforcing strip can increase the friction between the connecting block and the drill pipe, thereby improving the connection effect.
[0019] Furthermore, the pre-fixing assembly includes two pre-fixing posts slidably disposed inside the sliding sleeve. The pre-fixing posts are arranged symmetrically. The sliding sleeve has two symmetrically arranged sliding grooves. One end of each pre-fixing post extends into the sliding groove and is fixed with a pre-fixing spring. The end of the pre-fixing spring away from the pre-fixing post is fixedly connected to the sliding sleeve.
[0020] By adopting the above technical solution, when the sliding sleeve is fitted onto the drill pipe, the pre-fixing spring applies force to the pre-fixing post, so that the two pre-fixing posts are clamped on the drill pipe, thereby achieving the pre-fixation of the sliding sleeve. When the sliding sleeve is fixed by the fixing component, the sliding sleeve will not slide arbitrarily on the drill pipe.
[0021] Furthermore, a second ball bearing is rotatably connected to the end of the pre-fixed post away from the pre-fixed spring.
[0022] By adopting the above technical solution, when the sliding sleeve is pulled, the second ball rotates without affecting the movement of the sliding sleeve.
[0023] In summary, this application includes at least one of the following beneficial effects:
[0024] 1. In this application, when the drill bit passes through the plate, under the action of inertia and the continuous force of the user, the entire drill bit continues to move in the direction of motion. At this time, the ball bearings will contact the plate, and the sliding sleeve will rotate with the drill rod. The rotation of the ball bearings can reduce friction, thereby reducing the problem of wear caused to the plate by direct contact between the connecting shank and the plate during rotation. When the ball bearings are under force, the contact plate is also under force, and the contact plate moves into the movable groove. During the movement, the buffer spring is compressed, and the sliding column moves into the connecting sleeve. During the movement of the sliding column, the damping pad is compressed. Through the combination of the buffer spring, the sliding column, the connecting sleeve, the sliding column, the damping pad, and other structures, the impact force is buffered, thereby reducing the problem of wear on the plate surface and improving the quality of the workpiece.
[0025] 2. In this application, when it is necessary to fix the sliding sleeve, the connecting column is turned to make the reinforcing strip contact the drill rod. By turning the two connecting columns in sequence, the sliding sleeve can be fixed on the drill rod. When it is necessary to adjust the position of the sliding sleeve, the fixing column is rotated in the opposite direction to make the connecting block separate from the drill rod. The connection between the sliding sleeve and the drill rod is achieved through the connecting assembly, which has a good connection effect and is easy to disassemble. Attached Figure Description
[0026] Figure 1 This is a three-dimensional structural diagram of the drill bit in this application;
[0027] Figure 2This is a disassembly diagram of the drill bit and wear-resistant components in this application;
[0028] Figure 3 This application Figure 2 Enlarged view of point A in the middle;
[0029] Figure 4 This is a cross-sectional view of the wear-resistant component in this application.
[0030] Explanation of reference numerals in the attached figures:
[0031] 1. Connecting handle; 11. Connecting groove; 12. Drill rod section; 13. Drill head; 2. Anti-wear structure; 21. Sliding sleeve; 22. Movable groove; 23. Abutting block; 231. Buffer spring; 232. Connecting sleeve; 233. Sliding column; 234. Damping pad; 24. First ball bearing; 25. Connecting assembly; 251. Connecting column; 252. Mounting groove; 253. Connecting block; 254. Reinforcing strip; 26. Pre-fixing assembly; 261. Pre-fixing column; 262. Sliding groove; 263. Pre-fixing spring; 264. Second ball bearing. Detailed Implementation
[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0033] This application discloses a high-rigidity drill bit.
[0034] Reference Figure 1 A high-rigidity drill bit includes a connecting shank 1, one end of which has a connecting groove 11, a drill rod portion 12 fixed to the end of the connecting shank 1 away from the connecting groove 11, and a drill head 13 fixed to the end of the drill rod portion 12 away from the handle. Both the drill rod portion 12 and the drill head 13 have thread cutting grooves, and the drill rod portion 12 is provided with an anti-wear structure 2.
[0035] When using this drill bit, connect the connecting groove 11 on the connecting handle 1 to the handheld drill. Then, the user holds the handheld drill and starts it, causing the drill bit to rotate. Next, align the drill head 13 with the position where the hole needs to be drilled on the board and apply force to the handheld drill so that the drill head 13 passes through the board and completes the drilling. After the drill head 13 passes through the hole, the wear-resistant structure 2 can effectively reduce the wear caused to the surface of the board by the connecting handle 1 due to inertia and the continuous force of the user.
[0036] The wear-resistant structure 2 includes a sliding sleeve 21 that is slidably sleeved on the drill rod part 12. A movable groove 22 is provided at one end of the sliding sleeve 21 near the drill head 13. An abutment block 23 is slidably disposed inside the movable groove 22. A first ball bearing 24 is rotatably connected at one end of the abutment block 23 away from the sliding sleeve 21. A connecting component 25 and a pre-fixing component 26 are provided between the sliding sleeve 21 and the drill rod part 12.
[0037] Among them, the end of the abutment block 23 away from the first ball 24 is fixed with a buffer spring 231, and the end of the buffer spring 231 away from the abutment block 23 extends into the movable groove 22 and is fixedly connected to the sliding sleeve 21.
[0038] Furthermore, a connecting sleeve 232 is fixed at the bottom of the movable groove 22, and a sliding column 233 is slidably arranged inside the connecting sleeve 232. The end of the sliding column 233 away from the connecting sleeve 232 is fixedly connected to the abutment block 23. The buffer spring 231 is slidably sleeved on the connecting sleeve 232 and the sliding column 233. A damping pad 234 is fixed on the sliding column 233, and the damping pad 234 is in contact with the inner wall of the connecting sleeve 232.
[0039] When this drill bit is used with a handheld drill, as the drill head 13 passes through the plate, the entire drill bit continues to move due to inertia and the user's continuous force. At this time, the ball bearings will contact the plate, and the sliding sleeve 21 will rotate with the drill rod 12. The rotation of the ball bearings reduces friction, thereby reducing the problem of wear caused by the direct contact between the connecting handle 1 and the plate during rotation. When the ball bearings are under force, the contact plate is also under force, and the contact plate moves into the movable groove 22. During the movement, the buffer spring 231 is compressed, and the sliding column 233 moves into the connecting sleeve 232. During the movement, the damping pad 234 is compressed. Through the combination of the buffer spring 231, the sliding column 233, the connecting sleeve 232, the sliding column 233, the damping pad 234, and other structures, the impact force is buffered, thereby reducing the problem of wear on the plate surface and improving the quality of the workpiece.
[0040] The connecting assembly 25 includes two connecting posts 251 threadedly connected to the sliding sleeve 21. The connecting posts 251 are arranged symmetrically. The sliding sleeve 21 has two symmetrically arranged mounting grooves 252. One end of the connecting post 251 extends into the mounting groove 252 and is rotatably connected to a connecting block 253. The connecting block 253 fits into the mounting groove 252 and is slidably arranged with the mounting groove 252.
[0041] Among them, the connecting block 253 is fixed with a reinforcing strip 254 on its side, and the surface of the reinforcing strip 254 is rough.
[0042] When it is necessary to fix the sliding sleeve 21, turn the connecting post 251 so that the connecting post 251 moves toward the drill rod part 12. When the connecting post 251 rotates, the connecting block 253 is subjected to force. The connecting block 253 is subjected to force and is restricted by the mounting groove 252, so that it moves toward the drill rod part 12, so that the reinforcing strip 254 comes into contact with the drill rod part 12. Turn the two connecting posts 251 in sequence to fix the sliding sleeve 21 onto the drill rod part 12. When it is necessary to adjust the position of the sliding sleeve 21, turn the fixing post in the opposite direction to make the connecting block 253 separate from the drill rod part 12.
[0043] The pre-fixing component 26 includes two pre-fixing posts 261 that are slidably disposed inside the sliding sleeve 21. The pre-fixing posts 261 are arranged symmetrically. The sliding sleeve 21 has two symmetrically arranged sliding grooves 262. One end of the pre-fixing post 261 extends into the sliding groove 262 and is fixed with a pre-fixing spring 263. The end of the pre-fixing spring 263 away from the pre-fixing post 261 is fixedly connected to the sliding sleeve 21.
[0044] The pre-fixed post 261 is rotatably connected to a second ball bearing 264 at the end away from the pre-fixed spring 263.
[0045] When the sliding sleeve 21 is fitted onto the drill rod 12 without being fixed by the fixing component, the pre-fixing spring 263 abuts against the pre-fixing post 261, causing the two pre-fixing posts 261 to drive the second ball bearing 264 to abut against the drill rod 12, thereby clamping the sliding sleeve 21 onto the drill rod 12. When the position of the sliding sleeve 21 is adjusted and fixed by the fixing component, the sliding sleeve 21 will not slide arbitrarily, which is more conducive to adjusting the position of the sliding sleeve 21 and to fixing the sliding sleeve 21. When the sliding sleeve 21 is pulled to adjust its position, the second ball bearing 264 rotates, which can still maintain the clamping force of the sliding sleeve 21 without affecting the movement of the sliding sleeve 21.
[0046] Working principle: When using this drill bit, the sliding sleeve 21 is fitted onto the drill rod 12. The sliding sleeve 21 is adjusted to a suitable position according to the thickness of the plate. Then, the connecting post 251 is turned so that the connecting post 251 moves toward the drill rod 12. When the connecting post 251 rotates, the connecting block 253 is subjected to force. The connecting block 253 is subjected to force and is restricted by the mounting groove 252, thereby moving toward the drill rod 12, so that the reinforcing strip 254 contacts the drill rod 12. By turning the two connecting posts 251 in sequence, the sliding sleeve 21 can be fixed on the drill rod 12.
[0047] Next, connect the connecting groove 11 on the connecting handle 1 to the handheld drill. The user then holds the handheld drill and starts it, causing the drill bit to rotate. The drill head 13 is then aligned with the desired drilling position on the board, and force is applied to the handheld drill, causing the drill head 13 to pass through the board and complete the drilling. After the drill head 13 passes through the hole, due to inertia and the user's continued force, the entire drill bit continues to move. At this point, the ball bearings will contact the board, and the sliding sleeve 21 will rotate with the drill rod 12. The ball bearings will then rotate. This reduces friction, thereby reducing wear caused by direct contact between the connecting handle 1 and the plate during rotation. When the ball bearing is under force, the contact plate is also under force, and the contact plate moves into the movable groove 22. During the movement, the buffer spring 231 is compressed, and the sliding column 233 moves towards the inside of the connecting sleeve 232. During the movement, the damping pad 234 is compressed. The buffer spring 231, together with the sliding column 233, the connecting sleeve 232, the sliding column 233, the damping pad 234 and other structures, achieves the buffering of impact force.
Claims
1. A high-rigidity drill bit, comprising a connecting shank (1), characterized in that: One end of the connecting handle (1) is provided with a connecting groove (11). The end of the connecting handle (1) away from the connecting groove (11) is fixed with a drill rod part (12). The end of the drill rod part (12) away from the handle is fixed with a drill head (13). Both the drill rod part (12) and the drill head (13) are provided with thread cutting grooves. The drill rod part (12) is provided with an anti-wear structure (2).
2. A high-rigidity drill bit according to claim 1, characterized in that: The wear-resistant structure (2) includes a sliding sleeve (21) that is slidably sleeved on the drill rod (12). The sliding sleeve (21) has a movable groove (22) at one end near the drill head (13). An abutment block (23) is slidably arranged inside the movable groove (22). A first ball bearing (24) is rotatably connected to the end of the abutment block (23) away from the sliding sleeve (21). A connecting component (25) and a pre-fixing component (26) are provided between the sliding sleeve (21) and the drill rod (12).
3. A high-rigidity drill bit according to claim 2, characterized in that: A buffer spring (231) is fixed to one end of the abutment block (23) away from the first ball (24). The end of the buffer spring (231) away from the abutment block (23) extends into the movable groove (22) and is fixedly connected to the sliding sleeve (21).
4. A high-rigidity drill bit according to claim 3, characterized in that: The bottom of the movable groove (22) is fixed with a connecting sleeve (232). A sliding column (233) is slidably arranged inside the connecting sleeve (232). The end of the sliding column (233) away from the connecting sleeve (232) is fixedly connected to the abutment block (23). The buffer spring (231) is slidably sleeved on the connecting sleeve (232) and the sliding column (233). A damping pad (234) is fixed on the sliding column (233). The damping pad (234) is in contact with the inner wall of the connecting sleeve (232).
5. A high-rigidity drill bit according to claim 2, characterized in that: The connecting assembly (25) includes a connecting post (251) threaded onto a sliding sleeve (21). There are two connecting posts (251) arranged symmetrically. The sliding sleeve (21) has two symmetrically arranged mounting grooves (252) inside. One end of the connecting post (251) extends into the mounting groove (252) and is rotatably connected to a connecting block (253). The connecting block (253) fits into the mounting groove (252) and is slidably arranged with the mounting groove (252).
6. A high-rigidity drill bit according to claim 5, characterized in that: The connecting block (253) has a side-fixed reinforcing strip (254), and the surface of the reinforcing strip (254) is rough.
7. A high-rigidity drill bit according to claim 2, characterized in that: The pre-fixing component (26) includes two pre-fixing posts (261) slidably disposed inside the sliding sleeve (21). The pre-fixing posts (261) are arranged symmetrically. The sliding sleeve (21) has two symmetrically arranged sliding grooves (262). One end of the pre-fixing post (261) extends into the sliding groove (262) and is fixed with a pre-fixing spring (263). The end of the pre-fixing spring (263) away from the pre-fixing post (261) is fixedly connected to the sliding sleeve (21).
8. A high-rigidity drill bit according to claim 7, characterized in that: The end of the pre-fixed post (261) away from the pre-fixed spring (263) is rotatably connected to a second ball bearing (264).