Full-twist combined drill bit
The drill bit is stabilized by the limit block and bolt structure of the fully frosted drill bit, which solves the problem of the traditional frosted drill bit being easily shedded and accidentally injuring the operator, and achieves the stable and efficient use of the drill bit.
Patent Information
- Application Number
- CN202422312147.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-23
AI Technical Summary
Traditional twist drill bits are prone to fall off on the drill rig and are too long and can easily injure the operator, and the drill bit utilization rate is low.
A fully flip-combined drill bit is designed, including a fixed cylinder and a full flip-drip drill, which stabilizes the drill bit by a limit block and bolt structure, and adjusts the drill bit length by a telescopic adjustment device.
Effectively prevent drill bits from falling off, avoid accidental injury to operators, improve drill bit utilization, and adapt to the fixed needs of drill bits of different lengths.
Smart Images
Figure CN223083872U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of twist drills, in particular to a full twist combined drill bit. Background Art
[0002] A twist drill is a cutting tool for drilling circular holes in workpieces by rotating and cutting relative to its fixed axis. It gets its name because its chip flute is spiral and resembles a twist. The spiral grooves of existing twist drills can be two-flute, three-flute or more, but two-flute is the most common. The drill bit material of a twist drill is generally high-speed tool steel or cemented carbide, and it can be clamped on manual, electric handheld drilling tools or drill presses, milling machines, lathes and even machining centers for use. However, traditional twist drill bits still have the following defects:
[0003] 1) When the drill works, the drill bits will work together at the head of the drill. Since there are two spiral grooves on the side wall of the twist drill, the contact area is small when the drill clamps the twist drill, resulting in an unstable structure between the drill bit and the drill, making it easy for the traditional twist drill bit to cause the drill bit to fall off.
[0004] 2) During the process of the drill and the drill bit working, the drill bit rotates at a high speed to drill holes in an object or a plane. However, if the length of the drill bit is too long, it is very easy to cause accidental injury to the operator by the drill bit and the drill. Summary of the Utility Model
[0005] The utility model provides a full twist combined drill bit to solve the problems put forward in the above background art.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0007] A full twist combined drill bit includes a fixed cylinder and a full twist drill bit. There are two spiral grooves on the full twist drill bit. The full twist drill bit is inserted into the fixed cylinder. An installation groove is opened on the side wall of one end of the fixed cylinder, and a limiting block is welded and fixed in the installation groove. The limiting block is arranged in the shape of an inclined rectangular sheet, and the limiting block is located in the spiral groove of the full twist drill bit. The side wall of the fixed cylinder is connected to the full twist drill bit through a tightening and fixing device, and a telescopic adjusting device is arranged at the end of the fixed cylinder away from the limiting block.
[0008] As a further improvement of this technical scheme: The tightening and fixing device includes two positioning holes, a collar and a first bolt. The two positioning holes are respectively opened at positions near both ends of the fixed cylinder. The collar is slidably sleeved on the outer side wall of the fixed cylinder. The first bolt is threadedly connected to the side wall of the collar, and one end of the first bolt penetrates through the positioning hole and abuts against the side wall of the full twist drill bit.
[0009] As a further improvement of this technical solution: The telescopic adjustment device includes an adjustment cylinder, which is fixedly connected to the side wall of one end of the fixed cylinder. The inner side wall of the adjustment cylinder is provided with internal threads, and the inner side wall of the adjustment cylinder is threadedly connected with a second bolt, and one end of the second bolt abuts against one end of the full twist drill.
[0010] As a further improvement of this technical solution: The fixed cylinder and the adjustment cylinder are integrally formed.
[0011] Compared with the prior art, the beneficial effects of the present utility model are:
[0012] 1. The device is reasonably designed. By setting the limit block to limit the spiral groove of the full twist drill, it can prevent the easy detachment of the drill bit, and cooperate with the clamping action of the first bolt on the full twist drill, so that the drill bit is stable and more difficult to fall off;
[0013] 2. By setting the second bolt to drive the full twist drill to move, the drilling length of the full twist drill extending out of the fixed cylinder can be adjusted to prevent the long drill bit from accidentally injuring the operator;
[0014] 3. The drill bit in this device is a full twist drill without a shank. The drill bit has a high utilization rate, and even a slightly longer broken drill bit can be reused, with high practicability.
[0015] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and implement it in accordance with the content of the specification, the following takes the preferred embodiments of the present utility model and combines the accompanying drawings to describe in detail as follows. The specific implementation manner of the present utility model is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings described herein are used to provide a further understanding of the present utility model, and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0017] Figure 1 is a three-dimensional structural diagram of a full twist combination drill bit proposed by the present utility model;
[0018] Figure 2 is a front view sectional structural diagram of a full twist combination drill bit proposed by the present utility model;
[0019] Figure 3 is Figure 2 a partial enlarged structural diagram of A in
[0020] Figure 4 is a sectional structural diagram of the end face of the fixed cylinder in the present utility model.
[0021] In the accompanying drawings, the list of components represented by each reference numeral is as follows:
[0022] 1. Full twist drill; 2. Limit block; 3. Sleeve ring; 4. Adjusting cylinder; 5. Second bolt; 6. Installation groove; 7. Positioning hole; 8. Fixed cylinder; 9. First bolt. Specific embodiments
[0023] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model. In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the embodiments of the present utility model.
[0024] Please refer to Figures 1 to 4 , in the embodiment of the present utility model, a full twist combined drill bit includes a fixed cylinder 8 and a full twist drill 1. The full twist drill 1 is provided with two spiral grooves. The full twist drill 1 is inserted into the fixed cylinder 8. An installation groove 6 is opened on the side wall of one end of the fixed cylinder 8. A limit block 2 is welded and fixed in the installation groove 6. The limit block 2 is arranged in the shape of an inclined rectangular sheet. The limit block 2 is located in the spiral groove of the full twist drill 1. The side wall of the fixed cylinder 8 is connected to the full twist drill 1 through a tightening and fixing device;
[0025] Specifically, the tightening and fixing device includes two positioning holes 7, a sleeve ring 3 and a first bolt 9. The sleeve ring 3 is slidably sleeved on the outer side wall of the fixed cylinder 8. The first bolt 9 is threadedly connected to the side wall of the sleeve ring 3. One end of the first bolt 9 passes through the positioning hole 7 and abuts against the side wall of the full twist drill 1. After the first bolt 9 is screwed into the positioning hole 7 and tightly abuts against the side wall of the full twist drill 1, and under the limitation of the limit block 2, the full twist drill 1 can be stably fixed in the fixed cylinder 8. The two positioning holes 7 are respectively opened at positions near both ends of the fixed cylinder 8. When the full twist drill 1 is relatively long, one end of the full twist drill 1 can extend into the adjusting cylinder 4 and abut against one end of the second bolt 5. The sleeve ring 3 can move to the positioning hole 7 near the adjusting cylinder 4. At this time, one end of the first bolt 9 can abut against a position near the middle of the full twist drill 1. When the full twist drill 1 is relatively short and can only partially extend into the open end of the fixed cylinder 8, the sleeve ring 3 can move to the positioning hole 7 near the limit block 2, and then one end of the first bolt 9 abuts against the side wall of the full twist drill 1 to complete the fixation of the short drill bit.
[0026] Specifically, a telescopic adjusting device is provided at one end of the fixing cylinder 8 away from the limiting block 2. The telescopic adjusting device includes an adjusting cylinder 4. The adjusting cylinder 4 is fixedly connected to the side wall of one end of the fixing cylinder 8. The fixing cylinder 8 and the adjusting cylinder 4 are integrally formed. An internal thread is provided on the inner side wall of the adjusting cylinder 4. A second bolt 5 is threadedly connected to the inner side wall of the adjusting cylinder 4. One end of the second bolt 5 abuts against one end of the twist drill 1. When the second bolt 5 is screwed forward and backward, the second bolt 5 can move in and out of the adjusting cylinder 4. Furthermore, when one end of the twist drill 1 abuts against the side wall of one end of the second bolt 5, the length of the end of the twist drill 1 extending out of the fixing cylinder 8 can be adjusted by screwing the second bolt 5 to adjust the depth in the adjusting cylinder 4.
[0027] The working principle of the present utility model is as follows:
[0028] When installing the drill bit, first, the twist drill 1 can be inserted into the fixing cylinder 8. Since the limiting block 2 is located in the spiral groove of the twist drill 1, the limiting block 2 will limit the twist drill 1 from rotating in the fixing cylinder 8. The twist drill 1 will be inserted into the fixing cylinder 8 in a rotating state. When the bottom end of the twist drill 1 abuts against one end of the second bolt 5, the length of the end of the twist drill 1 extending out of the fixing cylinder 8 can be adjusted by screwing the second bolt 5 to adjust the depth in the adjusting cylinder 4. After the distance that the twist drill 1 extends out of the fixing cylinder 8 is adjusted, then the first bolt 9 is screwed into the positioning hole 7 and tightly abuts against the side wall of the twist drill 1, and the twist drill 1 can be stably fixed.
[0029] The above is only the preferred embodiment of the present utility model, and it does not impose any form of limitation on the present utility model. Any ordinary technician in the industry can smoothly implement the present utility model according to the instructions in the drawings and the above description. However, any equivalent changes made by those skilled in the art within the scope of the technical solution of the present utility model by using the technical content disclosed above, such as slight modifications, decorations, and evolutions, are all equivalent embodiments of the present utility model. At the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A full twist drill bit combination, comprising a fixed cylinder (8) and a full twist drill bit (1), characterized in that, The whole twist drill (1) is provided with two spiral grooves. The whole twist drill (1) is inserted into a fixed cylinder (8). An installation groove (6) is formed in the side wall of one end of the fixed cylinder (8). A limiting block (2) is fixedly welded in the installation groove (6). The limiting block (2) is arranged in the shape of an inclined rectangular sheet. The limiting block (2) is located in the spiral groove of the whole twist drill (1). The side wall of the fixed cylinder (8) is connected to the whole twist drill (1) through a tightening and fixing device. One end of the fixed cylinder (8) away from the limiting block (2) is provided with a telescopic adjusting device.
2. The full twist combination drill bit according to claim 1, characterized in that, The tightening and fixing device includes two positioning holes (7), a collar (3) and a first bolt (9). The two positioning holes (7) are respectively formed at positions near both ends of the fixed cylinder (8). The collar (3) is slidably sleeved on the outer side wall of the fixed cylinder (8). The first bolt (9) is threadedly connected to the side wall of the collar (3). One end of the first bolt (9) penetrates through the positioning hole (7) and abuts against the side wall of the whole twist drill (1).
3. A full twist drill bit combination according to claim 1, characterized in that, The telescopic adjusting device includes an adjusting cylinder (4). The adjusting cylinder (4) is fixedly connected to the side wall of one end of the fixed cylinder (8). Internal threads are provided on the inner side wall of the adjusting cylinder (4). A second bolt (5) is threadedly connected to the inner side wall of the adjusting cylinder (4). One end of the second bolt (5) abuts against one end of the whole twist drill (1).
4. The full twist drill bit assembly according to claim 3, wherein, The fixed cylinder (8) and the adjusting cylinder (4) are integrally formed.