Cross-shaped alloy drill bit

Abstract

The utility model discloses a cross-shaped alloy drill bit which comprises a drill bit body and a drill rod, a plurality of fixing portions are evenly distributed on the drill bit body with a circle point as the axis, fixing holes are formed in the fixing portions, one end of the drill rod is provided with a supporting portion and abuts against the two sides of the fixing portions, and the supporting portion is provided with a fastener and penetrates through the fixing holes. The drill rod is further provided with a fixing groove, the drill bit is provided with a conical protruding part, and the conical protruding part is embedded into the fixing groove in an interference fit mode. The drill bit and the drill rod can be rapidly connected or detached through the fastener, meanwhile, the protruding part is embedded into the fixing groove in an interference fit mode, the connection stability of the drill bit and the drill rod is enhanced, and through optimization of the structural design, the product has the advantages of being convenient to replace and improving the resource utilization rate.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a cross alloy drill bit. Background Art

[0002] A cross cutter head (welded and fixed at the end of a drill pipe, when the electric drill drives the drill pipe to rotate, cutting or drilling operations are carried out through the rotation of the cutter head), including a main cutting edge and a secondary cutting edge, the main cutting edge and the secondary cutting edge are arranged in a staggered manner to form a cross shape. During the working process of the cutter head, the main function of the main cutter head is to bear the cutting function of the whole cutter head, and the main function of the secondary cutter head is to assist in cutting when the main cutter head is working. The main cutting edge for mainly cutting is formed on the main cutting edge, and the secondary cutting edge for assisting in cutting is formed on the secondary cutting edge.

[0003] An impact drill bit consists of a cross alloy drill bit part and a drill pipe. The cross alloy drill bit part is mainly responsible for drilling through stones or concrete, while the drill pipe part is used for chip removal and expanding the working range of the alloy drill bit part. During daily use, often the cross alloy drill bit part is damaged while the drill pipe part only has slight wear, but the entire impact drill bit still needs to be scrapped, resulting in waste of production resources and increased use costs. Therefore, the applicant has made a beneficial design and found a method to solve the above problems. The technical solution to be introduced below was generated under this background. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies in the design proposed in the above background art, and provide a product that is convenient for replacement and improves resource utilization rate.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A cross alloy drill bit includes a drill bit and a drill pipe. The drill bit is evenly distributed with a plurality of fixing parts around a dot, the fixing parts are provided with fixing holes, one end of the drill pipe is provided with a supporting part, which abuts against both sides of the fixing part, the supporting part is provided with a fastening part, which passes through the fixing hole, the drill pipe is further provided with a fixing groove, and the drill bit is provided with a conical protruding part, which is embedded into the fixing groove by an interference fit manner.

[0007] Preferably, the supporting part is provided with a threaded hole, and is on the same axis line as the fixing hole.

[0008] Preferably, the number of the fixing parts is set to four.

[0009] Preferably, the tops of two of the fixing parts are provided with secondary cutting edges, and the tops of two of the fixing parts are provided with main cutting edges, the secondary cutting edges and the main cutting edges are arranged in a staggered manner.

[0010] Preferably, the fastener is set as a headless screw.

[0011] Advantageous effects:

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

[0013] In the present utility model, the drill bit can be quickly connected to or disassembled from the drill pipe through the fastener. At the same time, the convex part is embedded in the fixing groove in an interference fit manner, strengthening the connection stability between the drill bit and the drill pipe. Through the above optimization of the structural design, the product has the advantages of being convenient for replacement and improving resource utilization rate. Description of the drawings

[0014] Figure 1 is a structural schematic diagram of a cross alloy drill bit of the present utility model;

[0015] Figure 2 is a side sectional structural schematic diagram of a cross alloy drill bit of the present utility model;

[0016] Figure 3 is of the present utility model Figure 2 a partial enlarged view A of a cross alloy drill bit;

[0017] Figure 4 is an exploded view of a cross alloy drill bit of the present utility model;

[0018] The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0019] Reference numerals: 1, drill bit; 2, drill pipe; 3, fastener; 11, fixing part; 12, fixing hole; 13, convex part; 14, secondary cutting edge; 15, main cutting edge; 21, supporting part; 22, fixing groove; 23, threaded hole. Specific embodiments

[0020] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0022] In the embodiments of the present utility model, "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0023] Reference example Figures 1 to 4 , a cross alloy drill bit, including a drill bit 1 and a drill rod 2. The drill bit 1 is evenly distributed with a number of fixing parts 11 around a dot as the axis. The fixing parts 11 are provided with fixing holes 12. One end of the drill rod 2 is provided with a supporting part 21, which abuts against both sides of the fixing part 11. The supporting part 21 is provided with a fastener 3, which passes through the fixing hole 12. The drill rod 2 is also provided with a fixing groove 22. The drill bit 1 is provided with a conical protruding part 13, which is embedded in the fixing groove 22 by an interference fit method. By removing or tightening the fastener 3, the drill bit 1 and the drill rod 2 can be quickly removed or installed. At the same time, the protruding part 13 is embedded in the fixing groove 22 by an interference fit method to strengthen the connection stability between the drill bit 1 and the drill rod 2. When the drill bit 1 rotates, the supporting part 21 and the fixing groove 22 also provide a strong supporting point for the drill bit 1. According to the attachment Figure 3 As shown, the conical protruding part 13 is wider at the top and narrower at the bottom;

[0024] It is worth mentioning that the supporting part 21 is provided with a threaded hole 23, which is on the same axis line as the fixing hole 12. The threaded hole 23 makes the connection between the fastener 3 and it stable;

[0025] It is worth mentioning that the number of the fixing parts 11 is set to four, and the number of the fixing parts 11 provides support for the main cutting edge 15 and the secondary cutting edge 14;

[0026] It is worth mentioning that the tops of two of the fixing parts 11 are provided with secondary cutting edges 14, and the tops of two of the fixing parts 11 are provided with main cutting edges 15. The secondary cutting edges 14 and the main cutting edges 15 are arranged in a staggered manner. The main function of the main cutting edge 15 is to undertake the main cutting work. The main function of the secondary cutting edge 14 is to participate in the cutting together with the main cutting edge 15 during the cutting process, finally forming the machined surface and finishing the machined surface to improve the surface quality;

[0027] It is worth mentioning that the fastener 3 is set as a countersunk head screw, and the countersunk head screw prevents interference with the normal cutting work of the drill bit 1.

[0028] Through the above design scheme, the product can achieve the advantages of being easy to replace and improving resource utilization rate.

[0029] The above content further elaborates on the present utility model in combination with specific embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope determined by the claims submitted for the present utility model.

Claims

1. A cross alloy drill bit, comprising a drill bit (1) and a drill rod (2), characterized in that: The drill bit (1) is evenly distributed with a circle as the axis, and the fixing portion (11) is provided with a fixing hole (12). One end of the drill rod (2) is provided with a support portion (21) and abuts against two sides of the fixing portion (11). The support portion (21) is provided with a fastener (3) and passes through the fixing hole (12). The drill rod (2) is also provided with a fixing groove (22). The drill bit (1) is provided with a conical protrusion (13) and is embedded in the fixing groove (22) by interference fit.

2. The cross alloy drill bit according to claim 1, characterized in that: The support portion (21) is provided with a threaded hole (23) which is located on the same axis as the fixing hole (12).

3. The cross alloy drill bit according to claim 2, characterized in that: The number of the fixing parts (11) is set to four.

4. The cross alloy drill bit according to claim 3, characterized in that: The top ends of two of the fixing parts (11) are provided with secondary cutting edges (14), the top ends of two of the fixing parts (11) are provided with primary cutting edges (15), and the secondary cutting edges (14) and the primary cutting edges (15) are arranged in a staggered manner.

5. The cross alloy drill bit according to claim 4, characterized in that: The fastener (3) is configured as a headless screw.

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