Conical hard alloy tool bit

Abstract

The utility model discloses a conical hard alloy tool bit, and relates to the technical field of machine tools. The conical hard alloy tool bit comprises a tool bit body, a limiting device is arranged on the tool bit body and comprises a mounting base and a needle head, a mounting base groove is formed in the outer wall of one end of the tool bit body, the outer wall of one end of the mounting base is slidably connected with the interior of the mounting base groove, and four pull rod grooves are formed in the outer wall of the end, close to the mounting base, of the tool bit body; in a limiting device, a pull rod is pulled to move upwards to drive a limiting block to move upwards and drive a reset spring to contract at the same time, then the limiting block moves upwards to enable the other end of the limiting block to be disengaged from the interior of a second limiting block groove, and then a mounting base and a needle head can be taken down from a tool bit body by pulling the mounting base. In this way, it is avoided that a worker needs to disassemble the whole tool bit body to maintain and overhaul the needle head, the workload of the worker is effectively reduced, and meanwhile the practicability of the tool bit body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, and particularly relates to a conical cemented carbide cutting head. Background Art

[0002] The cemented carbide stepped drill is mainly used for drilling thin steel plates within 3 mm. The Chinese utility model patent with the authorization publication number "CN212761313U" discloses a cemented carbide stepped drill, including a drill bit. The drill bit is designed in a conical structure. The outer side wall of the drill bit is evenly provided with stepped cutting edges. A fixing sleeve is connected to the left side of the drill bit. A through hole is opened at the center of the interior of the drill bit. A fixing plate is arranged on the left side of the fixing sleeve. Fixing holes are opened on both the front and rear sides of the fixing plate. A connecting rod is arranged on the left side of the fixing plate. A connecting part is arranged on the left side of the connecting rod. A fixing rod is arranged inside the fixing sleeve. The extension rod and the needle head are integrally designed. The needle head penetrates through the interior of the through hole and extends to the end of the drill bit. The utility model can improve the overall convenience, economy and practicability of the cemented carbide stepped drill through the design.

[0003] Through the design of the needle head in the above technical solution, the needle head extends to the end of the drill bit through the extension rod by using the through hole. When the drill bit is in use, the end of the drill bit can be well protected. Drilling the material with the needle head can effectively avoid damage to the cutting edge at the end of the drill bit and increase the service life of the drill bit. However, the above technical solution still has certain defects. For example, in the above device, the needle head extends to the end of the drill bit through the extension rod by using the through hole and drills the material with the needle head. However, when the needle head needs to be replaced and repaired after long-term use, the staff needs to disassemble the entire cutting head for replacement and repair, which increases the workload of the staff and reduces the practicability of the device at the same time. Summary of the Utility Model

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and provide a conical cemented carbide cutting head, which can solve the problem that when the needle head needs to be replaced and repaired after long-term use in the device where the needle head extends to the end of the drill bit through the extension rod by using the through hole and drills the material with the needle head, the staff needs to disassemble the entire cutting head for replacement and repair, which increases the workload of the staff and reduces the practicability of the device at the same time.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a conical cemented carbide cutting head, including a cutting head body, and a limiting device is arranged on the cutting head body;

[0006] The limiting device includes a mounting base and a needle head. An outer wall at one end of the cutter head body is provided with a mounting base groove, and an outer wall at one end of the mounting base is slidably connected to the inside of the mounting base groove. An outer wall at one end of the cutter head body close to the mounting base is provided with four pull rod grooves, and pull rods are slidably connected to the inside of the four pull rod grooves respectively;

[0007] Among them, a threaded groove is provided at one end of the mounting base away from the cutter head body, and one end of the needle head is fixedly connected to the inside of the threaded groove. Four first limiting block grooves are provided in the inside of the mounting base groove, and limiting blocks are slidably connected to the inside of the four first limiting block grooves respectively. Four second limiting block grooves are provided on an outer wall at one end of the mounting base close to the cutter head body, and return springs are sleeved on the outer walls of the four pull rods.

[0008] Preferably, the mounting base groove is cross-shaped, and the inside of the four pull rod grooves communicates with the inside of the corresponding first limiting block grooves respectively;

[0009] Among them, one end of each of the four pull rods close to the limiting block slidably extends into the inside of the first limiting block groove and is fixedly connected to one end of the corresponding limiting block respectively.

[0010] Preferably, one end of each of the four limiting blocks close to the second limiting block groove contacts the inner wall of the corresponding second limiting block groove;

[0011] Among them, two ends of the four return springs are fixedly connected to the inner wall of the corresponding first limiting block groove and the outer wall of one end of the limiting block respectively.

[0012] Preferably, anti-slip teeth are installed on the outer wall of the cutter head body;

[0013] Among them, a drill bit is threadedly connected to the inside of the threaded groove.

[0014] Preferably, a needle head groove is provided in the inside of the drill bit;

[0015] Among them, one end of the needle head close to the drill bit slidably passes through the inside of the needle head groove and extends to the outside of the drill bit.

[0016] Preferably, a connecting head is installed at one end of the cutter head body away from the drill bit;

[0017] Among them, anti-slip teeth of the same kind are installed on the outer wall at the lower end of the connecting head.

[0018] Compared with the prior art, the beneficial effects of the present utility model are:

[0019] 1. For this conical cemented carbide cutting head, when the pull rod is pulled upward through the limiting device, the limiting block moves upward, driving the reset spring to contract. Then, as the limiting block moves upward, the other end of it disengages from the inside of the second limiting block groove. After that, by pulling the mounting seat, the mounting seat and the needle can be removed from the cutting head body. This avoids the need for workers to disassemble the entire cutting head body for maintenance and repair of the needle, effectively reducing the workload of the workers while improving the practicality of the cutting head body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0021] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0022] Figure 2 is a structural schematic diagram of the inside of the drill bit of the present utility model;

[0023] Figure 3 is a structural schematic diagram of the outside of the sliding seat of the present utility model;

[0024] Figure 4 is a structural schematic diagram of the outside of the connector of the present utility model.

[0025] Reference numerals: 1. Connector; 2. Anti-slip teeth; 3. Cutting head body; 4. Mounting seat; 5. Drill bit; 6. Needle; 7. Pull rod groove; 8. Pull rod; 9. Thread groove; 10. Needle groove; 11. Reset spring; 12. Limiting block; 13. First limiting block groove; 14. Mounting seat groove; 15. Second limiting block groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] This part will describe the specific embodiments of the present utility model in detail. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it should not be construed as a limitation on the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It 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 therefore should not be construed as a limitation on the present utility model.

[0028] In the description of the present utility model, "greater than", "less than", "exceeding", etc. are understood not to include the present number, and "above", "below", "within", etc. are understood to include the present number. If the first and second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0029] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0030] Please refer to Figures 1-4 , the present utility model provides a technical solution: a conical cemented carbide cutting head, including a cutting head body 3;

[0031] A limiting device is provided on the cutting head body 3;

[0032] The limiting device includes a mounting seat 4 and a needle head 6. An outer wall at one end of the cutting head body 3 is provided with a mounting seat groove 14. The mounting seat groove 14 is cross-shaped. An outer wall at one end of the mounting seat 4 is slidably connected to the inside of the mounting seat groove 14. An outer wall at one end of the cutting head body 3 close to the mounting seat 4 is provided with four pull rod grooves 7. Four pull rods 8 are slidably connected to the inside of the four pull rod grooves 7 respectively. A threaded groove 9 is provided at one end of the mounting seat 4 away from the cutting head body 3. One end of the needle head 6 is fixedly connected inside the threaded groove 9. Four first limiting block grooves 13 are provided inside the mounting seat groove 14. Four limiting blocks 12 are slidably connected to the inside of the four first limiting block grooves 13 respectively. The inside of the four pull rod grooves 7 communicates with the inside of the corresponding first limiting block grooves 13 respectively. One ends of the four pull rods 8 close to the limiting blocks 12 all slidably extend into the inside of the first limiting block grooves 13 and are respectively fixedly connected to one ends of the corresponding limiting blocks 12. An outer wall at one end of the mounting seat 4 close to the cutting head body 3 is provided with four second limiting block grooves 15. One ends of the four limiting blocks 12 close to the second limiting block grooves 15 are respectively in contact with the inner walls of the corresponding second limiting block grooves 15. Return springs 11 are sleeved on the outer walls of the four pull rods 8. Two ends of the four return springs 11 are respectively fixedly connected to the inner walls of the corresponding first limiting block grooves 13 and one end outer walls of the limiting blocks 12.

[0033] Among them, anti-slip teeth 2 are installed on the outer wall of the cutting head body 3. A drill bit 5 is threadedly connected inside the threaded groove 9. A needle head groove 10 is provided inside the drill bit 5. One end of the needle head 6 close to the drill bit 5 slidably passes through the inside of the needle head groove 10 and extends to the outside of the drill bit 5. A connecting head 1 is installed at one end of the cutting head body 3 away from the drill bit 5. Anti-slip teeth 2 are also installed on the outer wall at the lower end of the connecting head 1.

[0034] Furthermore, when using this device, it is started by connecting to an external power supply. First, the cutter head body 3 is installed on an external device through the connector 1. Then, the external device drills a hole in the part to be drilled through the cutter head body 3. First, the drill bit connector 1 is fixedly installed at the driving end of the electric drill. When drilling the material using the drill bit connector 1, then through the design of the needle 6, the needle 6 extends to the end of the drill bit 5 by means of the needle groove 10. Then, when the drill bit 5 is in use, the end of the drill bit 5 can be well protected. Drilling the material with the needle 6 can effectively avoid damage to the cutting edge at the end of the drill bit 5, increasing the service life of the drill bit 5. Then, when the needle 6 needs to be disassembled, rotate the drill bit 5 to make the other end thereof disengage from the inside of the thread groove 9. Then, pull the pull rod 8 upward to drive the limit block 12 to move upward while driving the return spring 11 to contract. Then, through the upward movement of the limit block 12, the other end thereof disengages from the inside of the second limit block groove 15. Then, pulling the mounting seat 4 can remove the mounting seat 4 and the needle 6 from the cutter head body 3.

[0035] Through the limit device, then pull the pull rod 8 upward to drive the limit block 12 to move upward while driving the return spring 11 to contract. Then, through the upward movement of the limit block 12, the other end thereof disengages from the inside of the second limit block groove 15. Then, pulling the mounting seat 4 can remove the mounting seat 4 and the needle 6 from the cutter head body 3. This avoids the need for staff to disassemble the entire cutter head body 3 for maintenance and repair of the needle 6, effectively reducing the workload of the staff while improving the practicality of the cutter head body 3. Through the needle 6 extending to the end of the drill bit 5 by means of the needle groove 10, then when the drill bit 5 is in use, the end of the drill bit 5 can be well protected. Drilling the material with the needle 6 can effectively avoid damage to the cutting edge at the end of the drill bit 5, increasing the service life of the drill bit 5, while reducing the production cost and effectively protecting the cutting edge at the end of the drill bit 5.

[0036] Working principle: First, the cutter head body 3 is installed on an external device through the connector 1. Then, the external device drills a hole in the part to be drilled through the cutter head body 3. First, the drill bit connector 1 is fixedly installed at the driving end of the electric drill. When using the drill bit connector 1 to drill the material, then through the design of the needle 6, the needle 6 extends to the end of the drill bit 5 by using the needle groove 10. Then, when the drill bit 5 is in use, it can well protect the end of the drill bit 5. Drilling the material with the needle 6 can effectively avoid damage to the cutting edge at the end of the drill bit 5 and increase the service life of the drill bit 5. Then, when the needle 6 needs to be disassembled, rotate the drill bit 5 to make the other end thereof disengage from the inside of the thread groove 9. Then, pull the pull rod 8 upward to drive the limit block 12 to move upward while driving the return spring 11 to contract. Then, through the upward movement of the limit block 12, the other end thereof disengages from the inside of the second limit block groove 15. Then, pulling the mounting seat 4 can remove the mounting seat 4 and the needle 6 from the cutter head body 3.

[0037] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A conical cemented carbide cutting head, comprising a cutting head body (3), characterized in that: A limiting device is provided on the cutter head body (3); The limiting device includes a mounting seat (4) and a needle head (6). An outer wall of one end of the cutter head body (3) is provided with a mounting seat groove (14). An outer wall of one end of the mounting seat (4) is slidably connected to the inside of the mounting seat groove (14). An outer wall of one end of the cutter head body (3) close to the mounting seat (4) is provided with four pull rod grooves (7). Four pull rods (8) are respectively slidably connected to the inside of the four pull rod grooves (7); Among them, a threaded groove (9) is provided at one end of the mounting seat (4) away from the cutter head body (3). One end of the needle head (6) is fixedly connected to the inside of the threaded groove (9). Four first limiting block grooves (13) are provided in the inside of the mounting seat groove (14). Four limiting blocks (12) are respectively slidably connected to the inside of the four first limiting block grooves (13). An outer wall of one end of the mounting seat (4) close to the cutter head body (3) is provided with four second limiting block grooves (15). A return spring (11) is sleeved on the outer wall of each of the four pull rods (8).

2. The conical cemented carbide cutting head according to claim 1, wherein: The mounting seat groove (14) is cross-shaped, and the inside of the four pull rod grooves (7) communicates with the inside of the corresponding first limiting block groove (13) respectively; Among them, one end of each of the four pull rods (8) close to the limiting block (12) slidably extends into the inside of the corresponding first limiting block groove (13) and is fixedly connected to one end of the corresponding limiting block (12).

3. A conical cemented carbide cutting head according to claim 1, characterized in that: One end of each of the four limiting blocks (12) close to the second limiting block groove (15) contacts the inner wall of the corresponding second limiting block groove (15); Among them, two ends of each of the four return springs (11) are fixedly connected to the inner wall of the corresponding first limiting block groove (13) and one end outer wall of the limiting block (12) respectively.

4. A conical cemented carbide cutting head according to claim 1, characterized in that: An anti-slip tooth (2) is mounted on the outer wall of the cutter head body (3); Among them, a drill bit (5) is threadedly connected to the inside of the threaded groove (9).

5. A conical cemented carbide cutting head according to claim 4, characterized in that: A needle head groove (10) is provided in the inside of the drill bit (5); Among them, one end of the needle head (6) close to the drill bit (5) slidably passes through the inside of the needle head groove (10) and extends to the outside of the drill bit (5).

6. A conical cemented carbide cutting head according to claim 1, wherein: A connector (1) is mounted at one end of the cutter head body (3) away from the drill bit (5); Among them, the same anti-slip teeth (2) are mounted on the outer wall of the lower end of the connector (1).

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