A hexagonal shank twist drill

Abstract

This application relates to the field of twist drills and discloses a hexagonal shank twist drill, including a drill shank and a retaining ring. A drill bit is fixedly mounted on one end of the drill shank, and the center of the drill shank and the center of the drill bit are on the same straight line. A groove is formed on the surface of the drill shank. A connecting spring is fixedly connected to one end of the retaining ring, and a shielding cylinder is rotatably connected to the end of the connecting spring away from the retaining ring. The inner wall of the shielding cylinder is rotatably mounted to the surface of the drill bit, and the inner wall of the retaining ring is movably connected to the surface of the drill shank. The dimensions of the inner wall of the retaining ring are adapted to the dimensions of the surface of the retaining ring, and the center of the shielding cylinder and the center of the drill bit are on the same straight line. By mounting the retaining ring on the surface of the drill shank and rotatably mounting the shielding cylinder on one end of the retaining ring with the connecting spring, this application provides shielding when the drill bit is not in use, thereby preventing the drill bit from causing injury to people or objects nearby when it is spinning idly.

Description

Technical Field

[0001] This application relates to the field of twist drills, and more particularly to a hexagonal shank twist drill. Background Technology

[0002] A twist drill is a tool used to drill round holes in a workpiece using a rotary cutting method. It gets its name from the spiral-shaped chip flutes that resemble a twisted rope. It is widely used for drilling holes in materials such as metal, wood, and plastics. A hexagonal shank twist drill is a specially designed twist drill bit with a hexagonal shank, primarily used for precision drilling in metal materials (such as stainless steel and alloys). The main body of the twist drill bit features a spiral chip flute, and the hexagonal shank design enhances grip. It maintains stability and is suitable for use with tools such as electric drills. Common materials include high-speed steel and M35 cobalt alloy. It has high hardness and strong wear resistance, making it suitable for high-strength materials. It is suitable for drilling stainless steel, alloy and other metal materials, balancing accuracy and durability. When using a conventional hexagonal shank twist drill, one end of the drill shank is inserted into the hexagonal slot of the drill machine, and the bolt on the surface of the drill machine is rotated to engage with the slot on the surface of the drill shank, thereby increasing the friction between the drill shank and the drill machine. The drill bit is installed at one end of the drill shank, and the drill machine controls the rotation of the drill bit to drill holes in the object.

[0003] Regarding the aforementioned technologies, the inventors believe that conventional drilling rigs are prone to accidental activation of the drilling rig switch during use, causing the drill bit to spin idly. When the drill bit spins idly, it can easily cause injury to people or objects in the vicinity. Furthermore, conventional drilling rig equipment does not have a protective structure, thus creating certain safety hazards when the drill bit is in use.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0005] To address the safety hazards associated with conventional hexagonal shank drill bits during idle rotation, this application provides a hexagonal shank twist drill.

[0006] The hexagonal shank twist drill provided in this application adopts the following technical solution: A hexagonal shank twist drill includes a drill shank and a retaining ring. A drill bit is fixedly mounted on one end of the drill shank, and the center of the drill shank and the center of the drill bit are on the same straight line. A groove is formed on the surface of the drill shank. A connecting spring is fixedly connected to one end of the retaining ring, and a blocking cylinder is rotatably connected to the end of the connecting spring away from the retaining ring. The inner wall of the blocking cylinder is rotatably mounted to the surface of the drill bit, and the inner wall of the retaining ring is movably connected to the surface of the drill shank. The dimensions of the inner wall of the retaining ring are adapted to the dimensions of the surface of the retaining ring, and the center of the blocking cylinder and the center of the drill bit are on the same straight line.

[0007] Preferably, the center of the connecting spring and the center of the shielding cylinder are on the same straight line, and the inner wall of the connecting spring is movably installed on the surface of the drill shank.

[0008] Preferably, one end of the shielding cylinder is fixedly connected to a connecting ring, and a plurality of rotating beads are rotatably installed on the inner wall of the connecting ring. The plurality of rotating beads are arranged in a circular array with the center of the connecting ring as the axis, and the size and specifications of the surface of the rotating beads are adapted to the size and specifications of the inner wall of the connecting ring.

[0009] Preferably, a bearing is fixedly connected to one end of the shielding cylinder, and one end of the bearing is rotatably installed with one end of the connecting cylinder, and the dimensions of the bearing surface are compatible with the dimensions of the inner wall of the shielding cylinder.

[0010] Preferably, a limiting ring is fixedly connected to the surface of the shielding cylinder, and an adjusting cylinder is rotatably connected to the surface of the limiting ring. The dimensions of the inner wall of the adjusting cylinder are adapted to the dimensions of the surface of the limiting ring, and one end of the adjusting cylinder is fixedly installed to one end of the fixed ring.

[0011] Preferably, a fixing block is fixedly connected to the end of the fixing ring away from the connecting spring, the inner wall of the fixing block is movably installed with the surface of the drill shank, and a fixing bolt is installed on the internal thread of the fixing block.

[0012] Preferably, a limiting groove is formed on the surface of the drill shank, and the inner wall of the limiting groove is engaged with one end of the fixing bolt.

[0013] In summary, this application includes the following beneficial technical effects: By installing a retaining ring on the drill shank surface, a shielding cylinder is rotatably mounted on one end of the retaining ring via a connecting spring. This shielding cylinder provides cover when the drill bit is not in use, preventing injury to people or objects from the drill bit spinning idly. A connecting spring is installed between the retaining ring and the shielding cylinder, pushing one end of the shielding cylinder to keep it in contact with the drill bit surface when the drill bit is removed. A connecting ring is installed on one end of the shielding cylinder, with several rotating balls rotatably connected to its inner wall to reduce friction between the connecting ring and the material. One end of the shielding cylinder is rotatably connected to one end of the connecting cylinder via a bearing, preventing the drill bit from rotating the shielding cylinder and making it safer to use. Compared to existing technologies, this design effectively improves the safety of using hexagonal shank twist drills. A limiting ring can also be installed at one end of the shielding cylinder. An adjusting cylinder is rotatably connected to the surface of the limiting ring to shield the surface of the connecting spring. A fixing ring is installed at one end of the fixing ring, and a fixing bolt is threaded to the inner wall of the fixing ring to lock the fixing block to the surface of the drill shank. A limiting groove is opened on the surface of the drill shank, and the inner wall of the limiting groove is locked to one end of the fixing bolt to improve the fixing effect of the fixing bolt. This effectively improves the performance of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a hexagonal shank twist drill according to an embodiment of the application; Figure 2 This is a schematic diagram of the fixed ring structure in an embodiment of the application; Figure 3 This is a side view of the embodiment of the application. Figure 4 This is a schematic diagram of the structure at point A in the embodiment of the application.

[0015] Explanation of reference numerals in the attached diagram: 1. Drill shank; 2. Drill bit; 3. Slot; 4. Retaining ring; 5. Connecting spring; 6. Blocking sleeve; 7. Connecting ring; 8. Ball bearing; 9. Bearing; 10. Limiting ring; 11. Adjusting sleeve; 12. Fixing block; 13. Fixing bolt; 14. Limiting groove. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0017] This application discloses a hexagonal shank twist drill, referring to... Figure 1 - Figure 2The system includes a drill shank 1. In use, one end of the drill shank 1 is inserted into the hexagonal slot 3 of the drill rig, and the bolt on the surface of the drill rig is engaged with the slot 3 on the surface of the drill shank 1, thereby increasing the friction between the drill shank 1 and the drill rig. A drill bit 2 is installed at one end of the drill shank 1. The drill bit 2 is rotated by the drill rig to drill a hole in the object. A fixing ring 4 is installed on the surface of the drill shank 1. A connecting spring 5 is installed at one end of the fixing ring 4. A shielding cylinder 6 is rotatably installed at one end of the connecting spring 5. The inner wall of the shielding cylinder 6 is rotatably connected to the surface of the drill bit 2. The shielding cylinder 6 shields the drill bit 2 when it is not in use, thereby preventing the drill bit 2 from causing injury to people or objects around it when it is spinning idly.

[0018] Reference Figure 2 A connecting spring 5 is installed between the fixing ring 4 and the shielding cylinder 6. The connecting spring 5 pushes one end of the shielding cylinder 6, thereby keeping the shielding cylinder 6 shielding the surface of the drill bit 2 when the drill bit 2 is removed from the object, and retracting the shielding cylinder 6 after the drill bit 2 has drilled into the object. A connecting ring 7 is installed at one end of the shielding cylinder 6. Several rotating balls 8 are rotatably connected to the inner wall of the connecting ring 7. The rotating balls 8 rotate after the connecting ring 7 contacts the object, thereby reducing the friction between the connecting ring 7 and the material. A bearing 9 is fixedly installed at one end of the shielding cylinder 6. One end of the bearing 9 is rotatably connected to one end of the connecting cylinder. The bearing 9 causes the shielding cylinder 6 and the connecting spring 5 to rotate relative to each other, thereby preventing the drill bit 2 from driving the shielding cylinder 6 to rotate, making the shielding cylinder 6 safer to use.

[0019] Reference Figure 2 - Figure 4 A limiting ring 10 is installed at one end of the shielding cylinder 6. An adjusting cylinder 11 is rotatably connected to the surface of the limiting ring 10. The limiting ring 10 prevents the adjusting cylinder 11 from detaching from the shielding cylinder 6. One end of the adjusting cylinder 11 is fixedly installed at one end of the fixing ring 4. The adjusting cylinder 11 shields the surface of the connecting spring 5, thereby preventing the connecting spring 5 from being corroded by external moisture. A fixing ring 4 is installed at one end of the fixing ring 4. A fixing bolt 13 is threadedly connected to the inner wall of the fixing ring 4. One end of the fixing bolt 13 is engaged with the surface of the drill shank 1. The fixing block 12 is engaged with the surface of the drill shank 1 by the fixing bolt 13, which facilitates the installation and disassembly of the device. A limiting groove 14 is opened on the surface of the drill shank 1. The inner wall of the limiting groove 14 is engaged with one end of the fixing bolt 13. The limiting groove 14 improves the fixing effect of the fixing bolt 13 and prevents the fixing bolt 13 from slipping between the fixing bolt 13 and the drill shank 1, which would cause the fixing bolt 13 to fall off.

[0020] The implementation principle of a hexagonal shank twist drill according to this application embodiment is as follows: A fixing ring 4 is installed on the surface of the drill shank 1. A connecting spring 5 is installed at one end of the fixing ring 4, and a shielding cylinder 6 is rotatably installed at the other end of the connecting spring 5. The inner wall of the shielding cylinder 6 is rotatably connected to the surface of the drill bit 2, so that the shielding cylinder 6 can block the drill bit 2 when it is not in use, thereby preventing the drill bit 2 from causing injury to people or objects around it when it is spinning idly. A connecting spring 5 is installed between the fixing ring 4 and the shielding cylinder 6, so that the connecting spring 5 can push one end of the shielding cylinder 6, thereby protecting the shielding cylinder 6 when the drill bit 2 is removed from the object. The shielding cylinder 6 is used to block the surface of the drill bit 2. After the drill bit 2 drills into the object, the shielding cylinder 6 is retracted. A connecting ring 7 is installed at one end of the shielding cylinder 6. Several rotating balls 8 are rotatably connected to the inner wall of the connecting ring 7 so that the connecting ring 7 can rotate after contacting the object, thereby reducing the friction between the connecting ring 7 and the material. A bearing 9 is fixedly installed at one end of the shielding cylinder 6. One end of the bearing 9 is rotatably connected to one end of the connecting cylinder so that the shielding cylinder 6 and the connecting spring 5 can rotate relative to each other, thereby preventing the drill bit 2 from driving the shielding cylinder 6 to rotate, making the shielding cylinder 6 safer to use.

[0021] A limiting ring 10 can also be installed at one end of the shielding cylinder 6. An adjusting cylinder 11 is rotatably connected to the surface of the limiting ring 10. The limiting ring 10 prevents the adjusting cylinder 11 from detaching from the shielding cylinder 6. One end of the adjusting cylinder 11 is fixedly installed at one end of the fixing ring 4 so as to shield the surface of the connecting spring 5 with the adjusting cylinder 11, thereby preventing the connecting spring 5 from being corroded by external moisture. A fixing ring 4 is installed at one end of the fixing ring 4. A fixing bolt 13 is threadedly connected to the inner wall of the fixing ring 4. One end of the fixing bolt 13 is engaged with the surface of the drill shank 1 so as to engage the fixing block 12 with the surface of the drill shank 1 with the fixing bolt 13, which facilitates the installation and disassembly of the device. A limiting groove 14 is opened on the surface of the drill shank 1. The inner wall of the limiting groove 14 is engaged with one end of the fixing bolt 13 so as to improve the fixing effect of the fixing bolt 13 with the limiting groove 14 and prevent the fixing bolt 13 from slipping between the fixing bolt 13 and the drill shank 1, which would cause the fixing bolt 13 to fall off.

[0022] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hexagonal shank twist drill, comprising a drill shank (1) and a retaining ring (4), characterized in that: A drill bit (2) is fixedly installed at one end of the drill shank (1). The center of the drill shank (1) and the center of the drill bit (2) are on the same straight line. A groove (3) is opened on the surface of the drill shank (1). A connecting spring (5) is fixedly connected to one end of the fixing ring (4). A shielding cylinder (6) is rotatably connected to the end of the connecting spring (5) away from the fixing ring (4). The inner wall of the shielding cylinder (6) is rotatably installed on the surface of the drill bit (2).

2. The hexagonal shank twist drill according to claim 1, characterized in that: The inner wall of the fixing ring (4) is movably connected to the surface of the drill shank (1). The size of the inner wall of the fixing ring (4) is adapted to the size of the surface of the fixing ring (4). The center of the shielding cylinder (6) is on the same straight line as the center of the drill bit (2).

3. A hexagonal shank twist drill according to claim 1, characterized in that: The center of the connecting spring (5) and the center of the shielding cylinder (6) are on the same straight line, and the inner wall of the connecting spring (5) is movably installed on the surface of the drill shank (1).

4. A hexagonal shank twist drill according to claim 1, characterized in that: One end of the shielding cylinder (6) is fixedly connected to a connecting ring (7). Several rotating beads (8) are rotatably installed on the inner wall of the connecting ring (7). The several rotating beads (8) are arranged in a circular array with the center of the connecting ring (7) as the axis, and the size of the surface of the rotating beads (8) is compatible with the size of the inner wall of the connecting ring (7).

5. A hexagonal shank twist drill according to claim 1, characterized in that: One end of the shielding cylinder (6) is fixedly connected to a bearing (9), one end of the bearing (9) is rotatably installed with one end of the connecting cylinder, and the size of the bearing (9) surface is compatible with the size of the inner wall of the shielding cylinder (6).

6. A hexagonal shank twist drill according to claim 1, characterized in that: The surface of the shielding cylinder (6) is fixedly connected to a limiting ring (10), and the surface of the limiting ring (10) is rotatably connected to an adjusting cylinder (11). The size of the inner wall of the adjusting cylinder (11) is compatible with the size of the surface of the limiting ring (10), and one end of the adjusting cylinder (11) is fixedly installed with one end of the fixing ring (4).

7. A hexagonal shank twist drill according to claim 1, characterized in that: The fixed ring (4) is fixedly connected to a fixed block (12) at the end away from the connecting spring (5). The inner wall of the fixed block (12) is movably installed on the surface of the drill shank (1), and a fixing bolt (13) is installed on the internal thread of the fixed block (12).

8. A hexagonal shank twist drill according to claim 1, characterized in that: A limiting groove (14) is provided on the surface of the drill shank (1), and the inner wall of the limiting groove (14) is engaged with one end of the fixing bolt (13).

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