High-speed steel taper shank twist drill
By designing alloy drill bits, auger rods, and ring joints, the problems of drill bit slippage and difficulty in replacement during drilling are solved, achieving stable connection and convenient replacement of drill bits, improving service life and reducing replacement costs.
Patent Information
- Application Number
- CN202520630877.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-07
AI Technical Summary
The small contact area between the drill shank and the chuck of existing drill bits makes them prone to slipping during drilling, causing wear or jamming, and making drill bit replacement difficult.
The design incorporates alloy drill bits, a spiral rod, and an annular connector. Positioned by self-locking nuts and alloy washers, and connected to the motor via a keyway, it ensures stability and reliability while facilitating drill bit disassembly and replacement.
It improves the stability and ease of replacement of drill bits, reduces wear and loosening, extends the service life of drill bits, and reduces replacement costs.
Smart Images
Figure CN223932661U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of twist drills, specifically to high-speed steel taper shank twist drills. Background Technology
[0002] In the machining industry, the drill shank of the drill bit used for drilling is generally cylindrical. The drill shank is inserted into the center hole of the chuck, and the locking mechanism of the chuck is loosened by a special wrench to clamp the drill shank in the chuck. The clamping surface of the chuck is usually an inner polygonal surface.
[0003] The commonly used three-jaw chuck has a triangular face, and its contact surface with the cylindrical drill shank is very small. To obtain sufficient clamping force, the chuck needs to be tightened. However, even so, slippage often occurs during drilling, causing wear on the drill bit shank or the drill bit to get stuck in the hole. Moreover, after the drill bit is worn, the drill rod is not significantly worn, making it difficult to replace the drill bit. Summary of the Invention
[0004] The purpose of this invention is to provide a high-speed steel taper shank twist drill to solve the aforementioned defects caused by the prior art.
[0005] A high-speed steel taper shank twist drill includes an alloy drill bit, a spiral rod, and an annular connector. A mating connector is positioned directly above the alloy drill bit, and the spiral rod is positioned directly above the mating connector. A disassembly mechanism is positioned directly below the spiral rod. This disassembly mechanism allows for the disassembly and assembly of the spiral rod and the alloy drill bit, facilitating the replacement of alloy drill bits with different hardness. A docking mechanism is positioned directly above the spiral rod, providing a keyed connection between the spiral rod and a motor or coupling, thereby improving the stability of the spiral rod during installation and operation.
[0006] Preferably, the disassembly mechanism includes an external threaded rod, an annular groove, an alloy washer, a self-locking nut, and a rubber washer. The top end of the external threaded rod is connected to the bottom end of a spiral rod. A self-locking nut is provided on the outer side of the annular joint. An annular groove is provided at the top end of the annular joint. A rubber washer is connected through the outer side of the external threaded rod. The top end of the rubber washer is fitted and connected to the bottom end of the spiral rod.
[0007] Preferably, the helical rod is connected to the outside of the self-locking nut via an external threaded rod at its bottom end.
[0008] Preferably, the annular connector is connected to an alloy gasket by having an annular groove at its top end.
[0009] Preferably, the docking mechanism includes an annular joint, a keyway, a docking through groove, and a strong magnetic sheet. The annular joint has a keyway distributed in a ring on its outer side, a docking through groove is provided on the outer side of the annular joint, a strong magnetic sheet is provided on the outer side of the annular joint, and the top end of a spiral rod is welded to the bottom end of the annular joint.
[0010] Preferably, the annular connector is connected to the motor output end via a keyway on its outer side.
[0011] Compared with the prior art, the present invention has the following advantages:
[0012] 1. The keyway structure of the ring joint is used to connect to the output end of the motor. The torque is transmitted through the key in the keyway. This method has the advantages of simple structure and low cost. This connection method is suitable for transmitting higher torque. In order to ensure the stability and reliability of the connection, the top of the screw is positioned by the ring joint to prevent loosening at the top of the screw.
[0013] 2. The alloy drill bit is positioned by using alloy washers and self-locking nuts, which makes it easier to generate a large locking force when the alloy drill bit is tightened, preventing loosening. Then, alloy drill bits of different hardness can be disassembled and replaced according to usage requirements. When used with alloy washers, this anti-loosening effect can be further enhanced, because the washers can fill the gaps between the connecting parts, reducing the possibility of vibration and loosening. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0015] Figure 2 This is a front view schematic diagram of the screw rod structure in this utility model.
[0016] Figure 3 This is a schematic diagram of the structure of the alloy drill bit in this utility model.
[0017] Figure 4 This is a schematic diagram of the structure of the alloy drill bit in this utility model.
[0018] in:
[0019] 1. Alloy drill bit; 2. Butt joint; 3. Spiral rod; 4. Annular joint; 5. Keyway; 6. Through groove for mating; 7. External thread rod; 8. Annular gasket groove; 9. Alloy washer; 10. Self-locking nut; 11. Disassembly mechanism; 12. Rubber pad; 13. Butt-jointing mechanism; 14. Strong magnetic sheet. Detailed Implementation
[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0021] like Figures 1 to 4As shown, a high-speed steel taper shank twist drill includes an alloy drill bit 1, a spiral rod 3, and an annular connector 4. A coupling 2 is located directly above the alloy drill bit 1, and the spiral rod 3 is located directly above the coupling 2. A disassembly mechanism 11 is located directly below the spiral rod 3. The disassembly mechanism 11 disassembles and assembles the spiral rod 3 and the alloy drill bit 1, facilitating the replacement of alloy drill bits 1 with different hardness. A docking mechanism 13 is located directly above the spiral rod 3, which provides a keyed connection between the spiral rod 3 and a motor or coupling, thereby improving the stability of the spiral rod 3 during installation and operation.
[0022] In this embodiment, the disassembly mechanism 11 includes an external thread rod 7, an annular groove 8, an alloy washer 9, a self-locking nut 10, and a rubber pad 12. The top end of the external thread rod 7 is connected to the bottom end of the spiral rod 3. The outer side of the annular joint 4 is provided with a self-locking nut 10. The top end of the annular joint 4 is provided with an annular groove 8. The outer side of the external thread rod 7 is connected through the rubber pad 12. The top end of the rubber pad 12 is fitted and connected to the bottom end of the spiral rod 3.
[0023] In this embodiment, the spiral rod 3 is connected to the outside of the self-locking nut 10 via the external thread rod 7 at its bottom end. The self-locking nut 10 locks the external thread rod 7 to prevent the connection between the spiral rod 3 and the alloy drill bit 1 from loosening.
[0024] In this embodiment, the annular connector 4 is connected to the alloy gasket 9 by having an annular groove 8 at its top end. The bottom end of the alloy gasket 9 is positioned by the annular groove 8 to ensure the stability of the annular connector 4 connection.
[0025] In this embodiment, the docking mechanism 13 includes an annular connector 4, a keyway 5, a docking through groove 6, and a strong magnetic sheet 14. The annular connector 4 has a keyway 5 distributed in a ring on its outer side, a docking through groove 6 is provided on the outer side of the annular connector 4, a strong magnetic sheet 14 is provided on the outer side of the annular connector 4, and the top end of the spiral rod 3 is welded to the bottom end of the annular connector 4.
[0026] In this embodiment, the annular connector 4 is connected to the motor output end through the keyway 5 on the outer side. The connection between the annular connector 4 and the motor output end completes the positioning of the spiral rod 3.
[0027] In practical applications, this type of high-speed steel taper shank twist drill includes the following tasks:
[0028] Step 1: During use, first select the alloy drill bit 1 of the appropriate specification or hardness, connect the annular groove 8 set at the top of the alloy drill bit 1 with the alloy washer 9, then symmetrically connect the alloy washer 9 with the bottom end of the spiral rod 3, install the self-locking nut 10 into the groove at the top of the connector 2, and fix the self-locking nut 10 and the connector 2 by electric welding.
[0029] Step 2: Then, by holding the external threaded rod 7 at the bottom of the rotating screw rod 3, the external threaded rod 7 is threadedly connected to the self-locking nut 10, connecting the self-locking nut 10 to the external threaded rod 7, and connecting the external threaded rod 7 to the connector 2. At the same time, the rubber pad 12 at the bottom of the screw rod 3 is connected to the alloy washer 9, and the connection is tightened by the rubber pad 12 and the alloy washer 9. The alloy washer 9 can effectively distribute the load of the self-locking nut 10 and reduce vibration and wear.
[0030] Step 3: After connecting the connector 2 at the top of the alloy drill bit 1 to the auger rod 3, insert the annular connector 4 at the top of the auger rod 3 into the motor output end or the inside of the coupling. Then insert the key into the keyway 5 and connect the annular connector 4 to the motor output end or the coupling using the key. Finally, tighten the connection between the annular connector 4 and the motor output end or the coupling using screws to prevent the auger rod 3 from loosening.
[0031] Step 4: The motor of the impact drill drives the annular joint 4 and the auger rod 3 to rotate through the gear transmission system. The alloy drill bit 1 set at the bottom of the auger rod 3 is used to drill the wall. The alloy drill bit 1 wears a lot during rotation. When the alloy drill bit 1 is damaged, the connector 2 set at the top of the alloy drill bit 1 is separated from the auger rod 3 and replaced to extend the service life of the twist drill and reduce the cost of use.
[0032] Therefore, the above-disclosed embodiments are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.
Claims
1. A high-speed steel taper shank twist drill, characterized in that: The assembly includes an alloy drill bit (1), a spiral rod (3), and an annular connector (4). A connecting joint (2) is provided directly above the alloy drill bit (1), and a spiral rod (3) is provided directly above the connecting joint (2). A disassembly mechanism (11) is provided directly below the spiral rod (3). The disassembly mechanism (11) disassembles and assembles the spiral rod (3) and the alloy drill bit (1), facilitating the replacement of alloy drill bits (1) with different hardness. A docking mechanism (13) is provided directly above the spiral rod (3), and the docking mechanism (13) connects the spiral rod (3) to a motor or coupling, thereby improving the stability of the spiral rod (3) during installation and operation.
2. The high-speed steel taper shank twist drill according to claim 1, characterized in that: The disassembly mechanism (11) includes an external thread rod (7), an annular groove (8), an alloy washer (9), a self-locking nut (10), and a rubber pad (12). The top end of the external thread rod (7) is connected to the bottom end of the spiral rod (3). The outer side of the annular joint (4) is provided with a self-locking nut (10). The top end of the annular joint (4) is provided with an annular groove (8). The outer side of the external thread rod (7) is connected through a rubber pad (12). The top end of the rubber pad (12) is fitted to the bottom end of the spiral rod (3).
3. The high-speed steel taper shank twist drill according to claim 2, characterized in that: The helical rod (3) is connected to the outside of the self-locking nut (10) via an external thread rod (7) provided at the bottom end.
4. The high-speed steel taper shank twist drill according to claim 2, characterized in that: The annular connector (4) is connected to the alloy gasket (9) through an annular groove (8) at its top.
5. The high-speed steel taper shank twist drill according to claim 1, characterized in that: The docking mechanism (13) includes an annular connector (4), a keyway (5), a docking through groove (6), and a strong magnetic sheet (14). The annular connector (4) has a keyway (5) distributed in a ring on its outer side. The annular connector (4) has a docking through groove (6) on its outer side. The annular connector (4) has a strong magnetic sheet (14) on its outer side. The bottom end of the annular connector (4) is welded with the top end of a spiral rod (3).
6. The high-speed steel taper shank twist drill according to claim 5, characterized in that: The annular connector (4) is connected to the motor output end through a keyway (5) on the outer side.