A replaceable head wear-resistant drill bit

Abstract

The utility model relates to drill bit technical field, concretely is a kind of wear-resistant drill bit of replaceable tool bit, including installation handle, the one end of installation handle is fixed with sleeve, sleeve's inside is inserted with connecting handle, and the one end of connecting handle integrally formed has detachable drill bit, the other end of connecting handle is fixed with screw rod, screw rod penetrates installation handle, and the one end of screw rod is equipped with nut with screw joint;Beneficial effects are that: by connecting handle and detachable drill bit integrally formed, and the connecting mode of sleeve and connecting handle insertion, and the screw joint fixing structure of screw rod and nut, the replacement of tool bit becomes simple and fast. When needing to replace detachable drill bit, just loosen nut and remove it from screw rod, then connecting handle is separated from sleeve, and detachable drill bit can be replaced. When installing new drill bit, it can be operated according to the reverse procedure. This design greatly reduces the difficulty and cost of tool bit replacement, improves work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of drill bits, specifically a wear-resistant drill bit with replaceable cutting heads. Background Technology

[0002] Drill bits are commonly used tools in drilling, machining, and other fields, and their performance directly affects work efficiency and quality. However, in actual use, existing drill bits have the following problems:

[0003] Difficulty in replacing drill bits: Traditional drill bits are mostly fixedly connected to the drill body. When the drill bit needs to be replaced due to wear or other reasons, the entire drill bit often needs to be replaced. This not only increases the cost of use, but also makes the replacement process cumbersome, requiring a lot of time and effort, and affecting work efficiency.

[0004] To address the aforementioned problems, this invention provides a wear-resistant drill bit with replaceable cutting heads, aiming to facilitate convenient cutting head replacement and improve connection stability and installation accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a wear-resistant drill bit with replaceable cutting head to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant drill bit with replaceable cutting head, including a mounting shank, a sleeve fixed to one end of the mounting shank, a connecting shank inserted inside the sleeve, a detachable drill bit integrally formed at one end of the connecting shank, a screw fixed to the other end of the connecting shank, the screw penetrating the mounting shank, and a nut screwed onto one end of the screw.

[0007] Preferably, the sleeve has a cylindrical tube structure, the inner ring of the sleeve has a hexagonal opening, the connecting handle has a hexagonal prism, and multiple rubber clips are fixed on the inner wall of the sleeve. The rubber clips are clamped between the sleeve and the connecting handle to produce elastic deformation.

[0008] Preferably, the other end of the mounting handle is provided with a reserved groove, which is an elongated oval groove. Two through holes are provided on the surface of the reserved groove. The screw and the through holes correspond one-to-one. The screw is inserted into the corresponding through hole, and the length of the screw is equal to the height of the mounting handle.

[0009] Preferably, a rubber pad is fixed to one end of the mounting handle. The rubber pad is a hexagonal ring. After the screw and nut are screwed and locked, the connecting handle squeezes the rubber pad to produce elastic deformation.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This utility model proposes a wear-resistant drill bit with replaceable cutting heads. By integrally molding the connecting shank and the detachable drill bit, and employing a sleeve-to-connecting shank connection, along with a screw-and-nut fixing structure, the replacement of the cutting head becomes simple and quick. When replacing the detachable drill bit, simply loosen the nut and remove it from the screw, then pull the connecting shank out of the sleeve to complete the disassembly. Installing a new drill bit is achieved by reversing the steps. This design significantly reduces the difficulty and cost of cutting head replacement, and improves work efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a top view of the structure of this utility model;

[0014] Figure 3 for Figure 2 Sectional view of the structure at point AA;

[0015] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0016] Figure 5 This is a schematic diagram showing the connection between the connecting handle and the detachable drill bit of this utility model;

[0017] Figure 6 This is a schematic diagram of the connection structure between the mounting handle and the sleeve of this utility model.

[0018] In the diagram: 1. Mounting handle; 2. Sleeve; 3. Connecting handle; 4. Detachable drill bit; 5. Rubber pad; 6. Reserved groove; 7. Through hole; 8. Screw; 9. Nut; 10. Rubber clamp strip. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Please see Figures 1-6This utility model provides a technical solution: a wear-resistant drill bit with replaceable cutting head, including a mounting shank 1, a sleeve 2 fixed to one end of the mounting shank 1, a connecting shank 3 inserted into the inside of the sleeve 2, the sleeve 2 having a cylindrical tube structure, the inner ring of the sleeve 2 having a hexagonal opening, the connecting shank 3 having a hexagonal prism, and multiple rubber clamping strips 10 fixed to the inner wall of the sleeve 2, the rubber clamping strips 10 clamping between the sleeve 2 and the connecting shank 3 to produce elastic deformation, realizing the anti-disengagement pre-limiting of the connecting shank 3 into the sleeve 2, and the connecting shank 3 and the sleeve 2 matching, when the connecting shank 3 is fixed to the sleeve 2, the rotation of the sleeve 2 drives the connecting shank 3 to rotate synchronously.

[0021] One end of the connecting handle 3 is integrally formed with a detachable drill bit 4, and the other end of the connecting handle 3 is fixed with a screw 8. The screw 8 passes through the mounting handle 1, and a nut 9 is screwed onto one end of the screw 8. The other end of the mounting handle 1 has a reserved groove 6, which is an elongated oval groove. Two through holes 7 are opened on the surface of the reserved groove 6. The screw 8 and the through holes 7 correspond one-to-one. The screw 8 is inserted into the corresponding through hole 7, and the length of the screw 8 is equal to the height of the mounting handle 1. A rubber pad 5 is fixed to one end of the mounting handle 1. The rubber pad 5 is a hexagonal ring. After the screw 8 and the nut 9 are screwed and locked, the connecting handle 3 compresses the rubber pad 5 to produce elastic deformation. When the connecting handle 3 is inserted into the sleeve 2, the screw 8 passes through the corresponding through hole 7. After the nut 9 is screwed onto the end of the screw 8 and locked, the rubber pad 5 is deformed under pressure and acts as an elastic washer. The connecting handle 3 is firmly fixed in the sleeve 2. When the detachable drill bit 4 needs to be replaced, the nut 9 is loosened and removed from the screw 8, and the connecting handle 3 is pulled out of the sleeve 2.

[0022] Instructions for using this replaceable-tip wear-resistant drill bit:

[0023] Inserting the connecting handle 3 into the sleeve 2: With the end of the connecting handle 3 with the detachable drill bit 4 facing the sleeve 2, insert the connecting handle 3 (a hexagonal prism) into the sleeve 2 (a circular tube structure with a hexagonal inner opening). During insertion, multiple rubber clamps 10 fixed to the inner wall of the sleeve 2 clamp between the sleeve 2 and the connecting handle 3 and undergo elastic deformation, providing a pre-limiting function to prevent the connecting handle 3 from detaching. At the same time, the connecting handle 3 matches the sleeve 2, preparing for subsequent synchronous rotation. After the connecting handle 3 is inserted into the sleeve 2, the screw 8 fixed to the other end of the connecting handle 3 (the length of the screw is equal to the height of the mounting handle 1) will pass through two through holes 7 opened on the surface of the pre-reserved groove 6 at the other end of the mounting handle 1 (the screw 8 and the through holes 7 correspond one-to-one). Screw the nut 9 onto the end of the screw 8 that protrudes after passing through the through holes 7 and tighten it. During the tightening process, the connecting handle 3 presses against the rubber pad 5 (a hexagonal ring) fixed at one end of the mounting handle 1, causing the rubber pad 5 to elastically deform. At this time, the rubber pad 5 acts as an elastic washer, and the connecting handle 3 is firmly fixed in the sleeve 2, completing the installation. When it is necessary to replace the detachable drill bit 4, first loosen the nut 9, allowing it to gradually unscrew from the screw 8. Continue to turn the nut 9 until it is completely removed from the screw 8. After removing the nut 9, pull the connecting handle 3 out of the sleeve 2. At this time, the detachable drill bit 4 is removed along with the connecting handle 3, completing the disassembly and allowing for drill bit replacement. After replacing with a new detachable drill bit 4, reinstall it following the above installation steps.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant drill bit with replaceable cutting head, comprising a mounting shank (1), characterized in that: One end of the mounting handle (1) is fixed with a sleeve (2), and a connecting handle (3) is inserted inside the sleeve (2). One end of the connecting handle (3) is integrally formed with a detachable drill bit (4), and the other end of the connecting handle (3) is fixed with a screw (8). The screw (8) passes through the mounting handle (1), and a nut (9) is screwed onto one end of the screw (8).

2. The wear-resistant drill bit with replaceable cutting head according to claim 1, characterized in that: The sleeve (2) has a cylindrical structure, the inner ring of the sleeve (2) is hexagonal, the connecting handle (3) is a hexagonal prism, and multiple rubber clips (10) are fixed on the inner wall of the sleeve (2). The rubber clips (10) are clamped between the sleeve (2) and the connecting handle (3) to produce elastic deformation.

3. The wear-resistant drill bit with replaceable cutting head according to claim 1, characterized in that: The other end of the mounting handle (1) is provided with a reserved groove (6). The reserved groove (6) is an elongated oval groove. Two through holes (7) are provided on the surface of the reserved groove (6). The screw (8) and the through holes (7) correspond one-to-one. The screw (8) is inserted into the corresponding through hole (7), and the length of the screw (8) is equal to the height of the mounting handle (1).

4. The wear-resistant drill bit with replaceable cutting head according to claim 1, characterized in that: One end of the mounting handle (1) is fixed with a rubber pad (5). The rubber pad (5) is a hexagonal ring. After the screw (8) and nut (9) are screwed and locked, the connecting handle (3) squeezes the rubber pad (5) to produce elastic deformation.

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