Cement drill bit with good cutting effect

Abstract

The utility model discloses a cement drill bit with a good cutting effect, and relates to the technical field of left-handed drill bits. The cement drill bit with the good cutting effect comprises a drill bit body, a telescopic mechanism is arranged on the drill bit body and comprises a fixing ring, a sliding groove A, a threaded rod, a threaded block, a support, a fixing block, a cutter handle and a sliding rod, the sliding groove A is formed in the surface of the bottom of the fixing ring, and the threaded rod is rotationally installed on the inner wall of the sliding groove A; the threaded rod penetrates through the threaded block and is in threaded connection with the threaded block, and the surface of the threaded block is hinged to one end of the support. A support, a fixing block, a threaded rod and a threaded block which are arranged in the telescopic mechanism are matched with one another, when a worker cannot reach the position where drilling is needed, the distance between a drill bit and a cutter handle is adjusted by rotating the threaded rod, the function of extending the drill bit is achieved, meanwhile, the threaded rod is limited through an inserting rod, and drilling efficiency is improved. And the stability of the whole equipment is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of left-handed drill bits, in particular to a cement drill bit with good cutting effect. Background Art

[0002] Left-hand milling cutters are generally selected under the demand for high-precision processing. Therefore, the material requirements and production process of left-hand milling cutters are particularly particular. Left-hand left-cut drill bits are often used in tight processing equipment. Left-hand left-cut drill bits can drill holes in materials reasonably.

[0003] According to a disclosed left-handed left-cutting drill bit (CN212469906U), it includes a shank and a drill bit part, the drill bit part is arranged at one end of the shank, and the top of the drill bit part is provided with a main cutting surface, a secondary cutting surface, a back cutter surface, a secondary back cutter surface and a cooling surface. In this left-handed left-cutting drill bit, there is a large drop between the main cutting surface and the back cutter surface to ensure the drilling effect. The secondary blade at the top of the drill bit part assists the main blade in drilling. There is a certain degree of angle offset between the secondary blade and the main blade to avoid excessive force concentration and ensure the service life of the entire drill bit. The cooling surface is used for a certain amount of heat dissipation, and the secondary cutting surface can be used as a channel for the waste chips to escape. The entire left-handed left-cutting drill bit has a good drilling effect and a good heat dissipation effect. The setting of the secondary blade and the main blade avoids stress concentration and ensures the service life of the entire drill bit. However, since the length of the ordinary drill bit is adjusted during use, it is easy to cause the worker to be unable to reach the position where the drill bit needs to be drilled during the drilling process, and the overall drilling efficiency will become low. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a cement drill bit with good cutting effect, which solves the problems raised in the above background technology. To achieve the above purpose, the utility model is implemented through the following technical scheme: a cement drill bit with good cutting effect, comprising a drill bit, the drill bit is provided with a telescopic mechanism, the telescopic mechanism comprises: a fixed ring, a slide groove A, a threaded rod, a threaded block, a bracket, a fixed block, a shank and a slide rod, a slide groove A is provided on the bottom surface of the fixed ring, a threaded rod is rotatably installed on the inner wall of the slide groove A, the threaded rod passes through the threaded block and is threadedly connected with the threaded block, the surface of the threaded block is hinged to one end of the bracket, the other end of the bracket is hinged to the surface of the fixed block, the fixed block is fixedly installed on the shank, the top of the shank passes through the slide rod and is slidably connected with the slide rod.

[0005] Preferably, a circular block is fixedly mounted on the end of the threaded rod away from the slide groove A, one end of the plug rod is slidably inserted into the circular block, and the other end of the plug rod is fixedly connected to the bottom surface of the slide plate. By inserting the plug rod into the circular block, the threaded rod is effectively limited to prevent the threaded rod from automatically rotating due to external force during the drilling process.

[0006] Preferably, the end of the slide away from the insertion rod is slidably installed in the slide groove B, the slide groove B is provided on the top surface of the fixing ring, and the inner wall of the slide groove B and the top of the slide are respectively fixedly connected to the two ends of the spring A. The stability of the insertion rod is ensured by the mutual cooperation of the slide groove B and the spring A.

[0007] Preferably, a movable round block is rotatably mounted on the inner wall of the fixed ring, an arc plate is fixedly mounted on the movable round block in a circumferential array, a push rod is passed through the arc plate and is slidably connected to the push rod, a spring B is sleeved on the surface of the push rod, the movable round block is fixedly connected to the drill bit, and the bottom of the movable round block is fixedly connected to the end of the slide rod away from the shank. When shaking occurs, the push rod provided on the movable round block will hit the drill bit, causing the drill bit to vibrate and causing impurities on the surface of the drill bit to fall off.

[0008] Preferably, an arc-shaped abutment plate is fixedly installed in a circumferential array on the top surface of the fixing ring, and the end of the push rod close to the arc-shaped abutment plate is in a "conical" shape. The arc-shaped abutment plate fixedly installed on the fixing ring can effectively ensure that when the fixing ring rotates, it will drive the arc-shaped abutment plate and squeeze the inclined surface of the push rod, so that the push rod hits the drill bit.

[0009] Preferably, a mounting plate is fixedly mounted on the arc-shaped abutment plate, and the mounting plate is fixedly mounted on the movable round block by bolts. The bolts fixed on the mounting plate effectively ensure the stability of the fixed ring and the movable round block.

[0010] The utility model provides a cement drill bit with good cutting effect. It has the following beneficial effects:

[0011] (1) According to the cooperation between the bracket, fixed block, threaded rod and threaded block set in the telescopic mechanism in the application, when the worker cannot reach the position where the hole needs to be drilled, the distance between the drill bit and the tool handle is adjusted by rotating the threaded rod to achieve the function of extending the drill bit. At the same time, the threaded rod is limited by the inserted rod, which effectively improves the stability of the entire equipment.

[0012] (2) According to the mutual cooperation of the movable round block, arc plate, push rod and arc back plate provided in the application, it can be effectively ensured that when there are a lot of debris on the surface of the drill bit, by rotating the movable ring, the arc back plate is driven to squeeze the inclined surface of the push rod, so that the back rod vibrates the drill bit to ensure that the impurities on the surface of the drill bit are shaken off. At the same time, through the cooperation of the bolts and the mounting plate, it is ensured that the whole equipment is more stable during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the overall structure of the telescopic mechanism of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the position relationship between the push rod and the arc-shaped abutment plate of the utility model;

[0016] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure of part A.

[0017] In the figure: 1. drill bit; 2. telescopic mechanism; 21. fixed ring; 22. slideway A; 23. threaded rod; 24. threaded block; 25. bracket; 26. fixed block; 27. tool handle; 28. slide rod; 3. round block; 4. plug rod; 5. slide plate; 6. slideway B; 7. spring A; 8. movable round block; 9. arc plate; 10. push rod; 11. spring B; 12. arc-shaped support plate; 13. mounting plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] For example, see Figure 1-4 A cement drill bit with good cutting effect comprises a drill bit 1, a telescopic mechanism 2 is arranged on the drill bit 1, and the telescopic mechanism 2 comprises: a fixed ring 21, a slide groove A22, a threaded rod 23, a threaded block 24, a bracket 25, a fixed block 26, a handle 27 and a slide rod 28. A slide groove A22 is provided on the bottom surface of the fixed ring 21, and a threaded rod 23 is rotatably installed on the inner wall of the slide groove A22. The threaded rod 23 penetrates the threaded block 24 and is threadedly connected with the threaded block 24. The surface of the threaded block 24 is hinged to one end of the bracket 25, and the other end of the bracket 25 is hinged to the surface of the fixed block 26. The fixed block 26 is fixedly installed on the handle 27, and the top of the handle 27 penetrates the slide rod 28 and is connected with the slide rod 28. The rod 28 is slidably connected, and a circular block 3 is fixedly installed on the end of the threaded rod 23 away from the slide groove A22. One end of the plug rod 4 is slidably inserted in the circular block 3, and the other end of the plug rod 4 is fixedly connected to the bottom surface of the slide plate 5. The plug rod 4 is inserted into the circular block 3, which effectively ensures that the threaded rod 23 is limited to prevent the threaded rod 23 from automatically rotating due to external force during the drilling process. The end of the slide plate 5 away from the plug rod 4 is slidably installed in the slide groove B6. The slide groove B6 is opened on the top surface of the fixed ring 21. The inner wall of the slide groove B6 and the top of the slide plate 5 are respectively fixedly connected to the two ends of the spring A7. The stability of the plug rod 4 is guaranteed by the mutual cooperation of the slide groove B6 and the spring A7.

[0020] During use, when a worker is unable to drill a hole due to distance reasons during the drilling process, he pulls the slide plate 5 upwards, the slide plate 5 squeezes the spring A7, and drives the insertion rod 4 to move out of the circular block 3. When the circular block 3 loses its limit, the threaded rod 23 is rotated, and the threaded rod 23 drives the threaded block 24 to move, controlling the tool handle 27 to move up and down, thereby adjusting the distance between the drill bit 1 and the tool handle 27, and extending the drill bit 1. After rotation, since the threaded rod 23 is self-locking, the insertion rod 4 does not necessarily need to be inserted into the circular block 3.

[0021] For example 2, please refer to Figure 1-4 On the basis of the first embodiment, a movable round block 8 is rotatably mounted on the inner wall of the fixed ring 21, and an arc plate 9 is fixedly mounted on the movable round block 8 in a circumferential array. The arc plate 9 is penetrated by a push rod 10 and is slidably connected with the push rod 10. A spring B11 is sleeved on the surface of the push rod 10. The movable round block 8 is fixedly connected to the drill bit 1, and the bottom of the movable round block 8 is fixedly connected to the end of the slide rod 28 away from the tool handle 27. When shaking occurs, the push rod 10 will hit the drill bit 1, causing the drill bit 1 to vibrate, so that impurities on the surface of the drill bit 1 will fall off, and the fixed ring 2 1 is fixedly mounted with an arc-shaped abutment plate 12 in a circumferential array on the top surface of the drill bit 1, and one end of the push rod 10 close to the arc-shaped abutment plate 12 is in a "conical" shape. The arc-shaped abutment plate 12 fixedly mounted on the fixing ring 21 can effectively ensure that when the fixing ring 21 rotates, it will drive the arc-shaped abutment plate 12 and squeeze the inclined surface of the push rod 10, so that the push rod 10 hits the drill bit 1, and a mounting plate 13 is fixedly mounted on the arc-shaped abutment plate 12. The mounting plate 13 is fixedly mounted on the movable round block 8 by bolts, and the bolts fixed on the mounting plate 13 effectively ensure the stability of the fixing ring 21 and the movable round block 8.

[0022] During use, based on the first embodiment, when the drill bit 1 needs to be cleaned, the bolts are removed from the mounting plate 13 and the movable round block 8, and the fixing ring 21 is rotated. During the rotation of the fixing ring 21, the arc-shaped abutment plate 12 is driven to squeeze the conical inclined surface of the push rod 10. After being squeezed, the push rod 10 will hit the drill bit 1, causing the drill bit 1 to vibrate, thereby shaking off surface impurities. When the surface of the drill bit 1 is cleaned, the bolts are reinstalled on the mounting plate 13 and the movable round block 8.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cement drill bit with good cutting effect, comprising a drill bit (1), characterized in that: The drill bit (1) is provided with a telescopic mechanism (2), and the telescopic mechanism (2) comprises: a fixed ring (21), a slide groove A (22), a threaded rod (23), a threaded block (24), a bracket (25), a fixed block (26), a tool handle (27) and a sliding rod (28). The bottom surface of the fixed ring (21) is provided with a slide groove A (22), and a threaded rod (23) is rotatably mounted on the inner wall of the slide groove A (22). The threaded rod (23) passes through the threaded block (24) and is threadedly connected to the threaded block (24). The surface of the threaded block (24) is hinged to one end of the bracket (25), and the other end of the bracket (25) is hinged to the surface of the fixed block (26). The fixed block (26) is fixedly mounted on the tool handle (27), and the top of the tool handle (27) passes through the sliding rod (28) and is slidably connected to the sliding rod (28).

2. A cement drill bit with good cutting effect according to claim 1, characterized in that: A circular block (3) is fixedly mounted on one end of the threaded rod (23) away from the slide groove A (22), one end of an insertion rod (4) is slidably inserted into the circular block (3), and the other end of the insertion rod (4) is fixedly connected to the bottom surface of the slide plate (5).

3. A cement drill bit with good cutting effect according to claim 2, characterized in that: The end of the slide plate (5) away from the insertion rod (4) is slidably mounted in the slide groove B (6), and the slide groove B (6) is opened on the top surface of the fixing ring (21). The inner wall of the slide groove B (6) and the top of the slide plate (5) are respectively fixedly connected to the two ends of the spring A (7).

4. A cement drill bit with good cutting effect according to claim 3, characterized in that: A movable round block (8) is rotatably mounted on the inner wall of the fixed ring (21), and an arc plate (9) is fixedly mounted on the movable round block (8) in a circular array. The arc plate (9) passes through a push rod (10) and is slidably connected to the push rod (10). A spring B (11) is sleeved on the surface of the push rod (10). The movable round block (8) is fixedly connected to the drill bit (1), and the bottom of the movable round block (8) is fixedly connected to an end of the slide rod (28) away from the tool handle (27).

5. A cement drill bit with good cutting effect according to claim 4, characterized in that: An arc-shaped support plate (12) is fixedly mounted in a circular array on the top surface of the fixing ring (21); one end of the push rod (10) close to the arc-shaped support plate (12) is in a "conical" shape.

6. A cement drill bit with good cutting effect according to claim 5, characterized in that: A mounting plate (13) is fixedly mounted on the arc-shaped abutment plate (12), and the mounting plate (13) is fixedly mounted on the movable round block (8) by means of bolts.

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