Chip removal structure of percussion drill

Abstract

The utility model relates to the technical field of percussion drills, and discloses a chip removal structure of a percussion drill. The drill bit is arranged at the end of the drill handle. The drill bit is provided with more than four even number of cutting edges, more than one first chip groove is formed between every two adjacent cutting edges, and the first chip grooves spirally extend along the circumferential face of the drill handle. The first chip groove spirally extends from the drill handle and forms a second chip groove. The drill bit has the advantages that the chip removal capacity of the chip removal groove is improved, the punching efficiency is improved, and rocks are not prone to being blocked and broken.

Description

Technical Field

[0001] This utility model relates to the field of impact drilling technology, and in particular to a chip removal structure for impact drilling. Background Technology

[0002] Impact drills, as a common drilling tool, are widely used in construction, decoration, metal processing, and other fields. During drilling, the friction between the drill bit and the workpiece generates a large amount of chips. If these chips cannot be removed in time, it can lead to drill bit clogging, poor heat dissipation, reduced drilling efficiency, and even damage to the drill bit or workpiece. Therefore, an efficient chip removal structure is crucial to the performance and lifespan of impact drills.

[0003] The current operation of alloy cross drills on the market involves first breaking the rock through impact, and then rotating the drill. The broken rock is then discharged through four chip removal grooves. However, due to the narrowness of the four chip removal grooves, the chip removal capacity is insufficient, resulting in the disadvantages of difficult drilling, slow speed, and easy clogging.

[0004] Therefore, improvements are needed. Utility Model Content

[0005] The technical problem solved by this utility model is to address the deficiencies in the prior art by providing a chip removal structure for an impact drill, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a chip removal structure for an impact drill, comprising: a drill shank; a drill bit, the drill bit being disposed at the end of the drill shank; the drill bit having four or more even-numbered cutting edges, and one or more first chip removal grooves being provided between adjacent cutting edges, the first chip removal grooves extending spirally along the circumferential surface of the drill shank; wherein, adjacent first chip removal grooves extending spirally from the drill shank and merging to form a second chip removal groove.

[0007] Furthermore, the end of the drill shank is provided with a mounting groove, the drill bit is embedded in the mounting groove, and the drill bit is welded to the drill shank.

[0008] Furthermore, the drill bit has four cutting edges, which are arranged in a circumferential array; a first chip removal groove is provided between adjacent cutting edges; adjacent first chip removal grooves extend spirally from the drill shank and merge to form a second chip removal groove.

[0009] Furthermore, the drill bit has six cutting edges, which are arranged in a circumferential array; a first chip removal groove is provided between adjacent cutting edges; adjacent first chip removal grooves extend spirally from the drill shank and merge to form a second chip removal groove.

[0010] Furthermore, the drill bit has eight cutting edges, which are arranged in a circumferential array; a first chip removal groove is provided between three adjacent cutting edges; adjacent first chip removal grooves extend spirally from the drill shank and merge to form a second chip removal groove.

[0011] Furthermore, a chip removal blade is formed between two adjacent first chip removal grooves, the chip removal blade extending spirally from the circumferential surface of the drill shank and the width and height of the chip removal blade gradually narrowing to the second chip removal groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] High-efficiency chip removal capability: It adopts a multi-stage spiral chip removal groove structure, which combines the first chip removal groove to form the second chip removal groove, forming a progressive chip removal channel, which significantly improves the chip removal efficiency.

[0014] Enhanced structural stability: The spiral merging design of adjacent chip removal grooves effectively disperses cutting stress, reduces the risk of drill bit breakage, and the circumferentially distributed cutting edges make the stress more uniform and improve drilling accuracy.

[0015] Extend tool life: The welded drill bit-shank connection structure ensures connection strength and facilitates production. The optimized layout of the chip removal groove reduces secondary wear caused by chip accumulation and extends the service life of the cutting edge. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of this utility model.

[0018] Figure 3 yes Figure 2 A partially enlarged structural diagram.

[0019] Figure 4 This is a schematic diagram of the structure of this utility model.

[0020] Reference numerals in the attached drawings: 1. Drill shank; 2. Drill bit; 3. Cutting edge; 4. First chip removal groove; 5. Second chip removal groove; 6. Chip removal edge; 7. Mounting groove. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In view of the technical problems described in the background art, such as Figure 1-4 As shown, a chip removal structure for an impact drill is provided, including: a drill shank 1; a drill bit 2, the drill bit 2 being disposed at the end of the drill shank 1; the drill bit 2 having four or more even-numbered cutting edges 3, and one or more first chip removal grooves 4 being provided between adjacent cutting edges 3, the first chip removal grooves 4 extending spirally along the circumferential surface of the drill shank 1; wherein, adjacent first chip removal grooves 4 extending spirally from the drill shank 1 and merging to form a second chip removal groove 5.

[0024] In view of the problems existing in the background art, a chip removal structure for an impact drill is proposed, including a drill shank 1 and a drill bit 2, wherein the drill shank 1 is used for connection with a power tool. Preferably, the drill bit 2 employs four or more even-numbered cutting edges 3, for example, four cutting edges 3, six cutting edges 3, or eight cutting edges 3. A chip removal edge 6 is formed between two adjacent first chip removal grooves 4. The chip removal edge 6 extends spirally from the circumferential surface of the drill shank 1, and its width and height gradually narrow towards the second chip removal groove 5, i.e., the chip removal edge 6 gradually contracts, causing the two first chip removal grooves 4 to merge to form the second chip removal groove 5.

[0025] In specific implementation.

[0026] When four cutting edges 3 are used, four first chip removal grooves 4 are formed between the four cutting edges 3. The first chip removal grooves 4 extend spirally along the circumference of the drill shank 1. As they extend toward the drill shank 1, the four first chip removal grooves 4 gradually merge into two second chip removal grooves 5.

[0027] When six cutting edges 3 are used, six first chip removal grooves 4 are formed between the six cutting edges 3. The first chip removal grooves 4 extend spirally along the circumference of the drill shank 1. As they extend toward the drill shank 1, the six first chip removal grooves 4 gradually merge into three second chip removal grooves 5.

[0028] When eight cutting edges 3 are used, every two cutting edges 3 form the first chip removal groove 4, that is, the eight cutting edges 3 form four first chip removal grooves 4. The first chip removal grooves 4 extend spirally along the circumference of the drill shank 1. As they extend toward the drill shank 1, the four first chip removal grooves 4 gradually merge into two second chip removal grooves 5.

[0029] In the above technical solution, under the premise of drilling into the rock, four or more cutting edges 3 are used to form a multi-stage spiral chip removal groove structure. The first chip removal groove 4 is combined to form the second chip removal groove 5, forming a progressive chip removal channel. As the chip removal edge 6 is gradually reduced, the chip removal efficiency is significantly improved. The spiral merging design of adjacent chip removal grooves at the drill bit 2 position effectively disperses the cutting stress and reduces the risk of drill bit 2 breakage. The circumferentially distributed cutting edges 3 make the force more uniform and improve the drilling accuracy.

[0030] Preferably, the end of the drill shank 1 is provided with a mounting groove 7, the drill bit 2 is embedded in the mounting groove 7, and the drill bit 2 is welded to the drill shank 1.

[0031] The welded drill bit 2-drill shank 1 connection structure ensures connection strength while facilitating production. Welding methods can include high-frequency welding, brazing, resistance welding, etc.

[0032] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A chip removal structure for an impact drill, characterized in that, include: Drill shank; A drill bit is disposed at the end of the drill shank; the drill bit has four or more even-numbered cutting edges, and one or more first chip removal grooves are provided between adjacent cutting edges, the first chip removal grooves extending spirally along the circumferential surface of the drill shank. The adjacent first chip removal grooves extend spirally from the drill shank and merge to form the second chip removal groove.

2. The chip removal structure of the impact drill according to claim 1, characterized in that: The end of the drill shank is provided with a mounting groove, the drill bit is embedded in the mounting groove, and the drill bit is welded to the drill shank.

3. The chip removal structure of the impact drill according to claim 1, characterized in that: The drill bit has four cutting edges arranged in a circumferential array; a first chip removal groove is provided between adjacent cutting edges; adjacent first chip removal grooves extend spirally from the drill shank and merge to form a second chip removal groove.

4. The chip removal structure of the impact drill according to claim 1, characterized in that: The drill bit has six cutting edges arranged in a circular array; a first chip removal groove is provided between adjacent cutting edges; adjacent first chip removal grooves extend spirally from the drill shank and merge to form a second chip removal groove.

5. The chip removal structure of the impact drill according to claim 1, characterized in that: The drill bit has eight cutting edges arranged in a circular array; a first chip removal groove is provided between three adjacent cutting edges; adjacent first chip removal grooves extend spirally from the drill shank and merge to form a second chip removal groove.

6. The chip removal structure of the impact drill according to claim 1, characterized in that: A chip removal blade is formed between two adjacent first chip removal grooves. The chip removal blade extends spirally from the circumferential surface of the drill shank and its width and height gradually narrow to the second chip removal groove.

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