Open body silent drill bit

Abstract

The application discloses an open-body mute drill bit, which comprises a disc seat, a fixed half cylinder is fixed to the bottom left side of the disc seat, a movable half cylinder is movably combined to the right side of the fixed half cylinder and the bottom of the disc seat, and a semicircular supporting plate is fixed to the inner side of the movable half cylinder. When the main spring pressure rod in the fixed half cylinder drives the top block to slide to one side, the lock block is in the unlocking state on the sliding shaft, so that the movable half cylinder is unlocked. The whole movable half cylinder can slide downward in the unlocking state of the lock block. The movable half cylinder is installed in the movable groove in the fixed plate through the sliding shaft. After the movable half cylinder slides down, the external pile driver can be controlled to make the movable half cylinder drill teeth hang on the ground, so that the movable half cylinder is dragged to open the slag discharge, the mute slag discharge effect is achieved, the mute property of the drill bit is further improved, and the great noise generated by the pile driver when the drill bit shakes and shakes the slag is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of drill bit technology, specifically relating to an open-body silent drill bit. Background Technology

[0002] Open-body drilling is a construction technique suitable for hole-forming operations in building foundation engineering. It is widely used in foundation construction projects such as municipal construction, highway bridges, and high-rise buildings. With different drilling tools, it is suitable for dry, wet, and rock-forming hole-forming operations. Open-body drilling is a type of drill bit that uses a cutting edge to drill or make holes, enlarging the bottom hole drilled by the drill bit. Currently, most pile drivers in the construction engineering field often need to shake to clean the soil and debris on the inner wall of the drill bit during the drilling process using open-body drilling. However, the pile driver will make a lot of noise when shaking the open-body drill to throw away the debris. Summary of the Invention

[0003] The purpose of this invention is to provide an open-body silent drill bit to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an open-body silent drill bit, comprising a disc base, a fixed half-cylinder fixed to the bottom left side of the disc base, a movable half-cylinder movably assembled to the right side of the fixed half-cylinder and located at the bottom of the disc base, and a semi-circular support plate fixed to the inner side of the movable half-cylinder; a half-cylinder A component is provided at the bottom of the fixed half-cylinder, with locking grooves provided at both ends of the bottom right side of the half-cylinder A component; a half-cylinder B component is provided at the bottom of the movable half-cylinder, with locking hooks at both the front and rear ends of the bottom of the half-cylinder B component that lock with the locking grooves; the disc base end... A main spring pressure rod component is installed on the left side of the part through a semi-circular slot. A limiting plate is fixed to the right side of the square column at the end of the disc seat. A top rod component is movably passed through the limiting plate. Mounting plates are symmetrically arranged at the end of the semi-circular support plate. Fixing plates are symmetrically fixed to the bottom right end of the disc seat on the inner side of the mounting plate. Each fixing plate has a movable slot. A sliding shaft is slidably arranged in the movable slot. A locking block is sleeved and fixed on the sliding shaft. A top block for locking and unlocking the locking block is movably installed on one side of the movable slot and on the inner side of the fixing plate through a pin.

[0005] Preferably, the main spring pressure rod component includes a cylindrical seat fixed to the left side of the end of the disc seat. A spring sleeve is fixed inside the cylindrical seat. A limit block is fixed to the bottom end of the spring sleeve. The left end of the limit block extends to the concave surface of the right end of the mounting plate. A main spring pressure rod is movably arranged inside the spring sleeve. The bottom end of the main spring pressure rod passes through the bottom of the limit block and is fixed with a connecting seat. The upper end of the main spring pressure rod is movably sleeved with a limit fixing plate. One end of the limit fixing plate is fixed to one corner of a square column provided at the end of the disc seat. After the main spring pressure rod is subjected to force, it drives the top rod to slide to one side, thereby locking or unlocking the movable half cylinder.

[0006] Preferably, bushings are fixedly installed through both sides of the inner side wall of the mounting plate. The bushings are movably inserted through both ends of the sliding shaft and located on the outer sides of the fixed plate. The locking blocks movably sleeved on the sliding shaft are movably limited to the inner side of the fixed plate, so that the sliding shaft can slide in the fixed plate and drive the movable half-cylinder to slide.

[0007] Preferably, the push rod component includes a push rod sleeve that movably passes through the limiting plate. A push rod is inserted into the bottom end of the push rod sleeve. A spring limiting block is sleeved on the bottom end of the push rod. A spring member is sleeved on the outside of the push rod. The top end of the spring member is limited at the bottom end of the push rod sleeve, and the bottom end of the spring member is limited by the spring limiting block fixed to the bottom of the push rod. The spring limiting block is fixedly welded to the inner side of the fixed plate. The bottom of the push rod movably pushes against the right side of the end of the semi-circular support plate, so that the push rod moves up and down under the action of the spring member, and drives the movable semi-cylinder to move through the semi-circular support plate.

[0008] Preferably, the connecting seat at the bottom of the main spring rod is connected to a linkage block via a pin. The linkage block is engaged and fixed inside the bottom of one side of the top block, thereby driving the movable half cylinder to lock or unlock.

[0009] Preferably, the bottom ends of the A semi-cylinder and the B semi-cylinder are respectively provided with fixed semi-cylinder drill teeth and movable semi-cylinder drill teeth. The fixed semi-cylinder drill teeth and the movable semi-cylinder drill teeth are obliquely symmetrical and extend inward, and are used for drilling soil and removing slag.

[0010] Preferably, through holes are provided on the front and rear walls of the upper part of the movable half-cylinder, and the movable half-cylinder allows the bushing fixed on the mounting plate to move into the through holes, so as to realize the sliding or unfolding of the movable half-cylinder on one side of the disc seat.

[0011] The technical effects and advantages of this invention are as follows: This open-body silent drill bit transmits force to the main spring pressure rod component from the outside. When the main spring pressure rod in the main spring pressure rod component is stressed, it drives the linkage block downward through the connecting seat to drive the top block. The top block is slidably connected to the inner side of the fixed plate set at the bottom of the disc seat through a pin. When stressed, one end of the top block slides to one side and the other end of the top block moves upward, allowing the movable half cylinder to be locked by the locking block and the locking hook at the bottom of the movable half cylinder through one end of the top block, which is then locked into the locking groove at the bottom of the fixed half cylinder. This makes the combination of the fixed half cylinder drill teeth and the movable half cylinder drill teeth more robust and durable when working, further improving the stability of the drill bit.

[0012] When the main spring rod in the fixed half-cylinder drives the top block to slide to one side, the locking block is unlocked on the sliding shaft, thereby unlocking the movable half-cylinder. The movable half-cylinder can slide downwards with the locking block unlocked. The movable half-cylinder is installed in the movable groove in the fixed plate through the sliding shaft. After the movable half-cylinder slides down, the external piling machine can be controlled to make the drill teeth of the movable half-cylinder hook onto the ground, thereby dragging the movable half-cylinder to open the slag discharge, achieving a silent slag discharge effect, further improving the quietness of the drill bit, and thus greatly reducing the great noise emitted by the piling machine when shaking the drill bit to throw slag. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded front view of the movable half-cylinder of the present invention; Figure 3 This is a front view of the main spring compression rod component of the present invention; Figure 4 This is an exploded view of the present invention; Figure 5 This is a diagram of the locking block and sliding shaft assembly of the present invention.

[0014] In the diagram: 1. Disc base; 2. Fixed half-cylinder; 3. Movable half-cylinder; 4. Top block; 5. Semicircular support plate; 6. Half-cylinder A component; 7. Lock groove; 8. Half-cylinder B component; 9. Lock hook; 10. Movable half-cylinder drill teeth; 11. Main spring pressure rod component; 12. Mounting plate; 13. Fixed plate; 14. Movable groove; 15. Sliding shaft; 16. Through hole; 17. Lock block; 18. Cylinder base; 19. Spring sleeve; 20. Limiting block; 21. Main spring pressure rod; 22. Connecting seat; 23. Bushing; 24. Top rod component; 25. Top rod sleeve; 26. Top rod; 27. Spring component; 28. Linkage block; 29. ​​Fixed half-cylinder drill teeth. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-5This invention provides a technical solution for an open-body silent drill bit, including a disc base 1. A fixed half-cylinder 2 is fixed on the left side of the bottom of the disc base 1, and a movable half-cylinder 3 is movably assembled on the right side of the fixed half-cylinder 2 and located at the bottom of the disc base 1, which facilitates the assembly and locking of the drill bit and the sliding unlocking of the movable half-cylinder. A semi-circular support plate 5 is fixed on the inner side of the movable half-cylinder 3, which allows the mounting plate 12 to be fixed at the end of the semi-circular support plate 5, so as to form a movable support for the sliding shaft 15. A half-cylinder A 6 is provided at the bottom of the fixed half-cylinder 2, and locking grooves 7 are provided at both ends of the bottom right side of the half-cylinder A 6, which facilitates the hooking assembly with the movable half-cylinder 3. A half-cylinder B 8 is provided at the bottom of the movable half-cylinder 3, and locking hooks 9 are provided at the front and rear ends of the bottom of the half-cylinder B 8, which lock with the locking grooves 7, so that the movable half-cylinder can be hooked into the locking grooves 7 by the locking hooks 9 on the half-cylinder B 8 to achieve a fixed assembly.

[0017] The bottom ends of the A semi-cylinder 6 and the B semi-cylinder 8 are respectively provided with fixed semi-cylinder drill teeth 29 and movable semi-cylinder drill teeth 10. The fixed semi-cylinder drill teeth 29 and movable semi-cylinder drill teeth 10 are obliquely symmetrical and extend inward, which is conducive to the drilling work of the pile driver driving the drill bit. The main spring pressure rod component 11 is installed on the left side of the end of the disc seat 1 through a semi-circular slot. The main spring pressure rod component 11 includes a cylinder seat 18 fixed on the left side of the end of the disc seat 1, which is conducive to the elastic up and down movement of the main spring pressure rod 21. A spring sleeve 19 is fixed inside the cylinder seat 18, and a limit block 20 is fixed at the bottom end of the spring sleeve 19 to limit and fix the spring sleeved in the main spring pressure rod 21. The left end of the limit block 20 extends to the concave surface of the right end of the mounting plate 12, which can ensure that the main spring pressure rod component 11 maintains vertical stability when sliding up and down.

[0018] The main spring pressure rod 21 is movably arranged inside the spring sleeve 19, and the bottom end of the main spring pressure rod 21 extends through to the bottom of the limiting block 20 and is fixed with a connecting seat 22, so that the connecting seat 22 drives the linkage block 28 to move up and down. The upper end of the main spring pressure rod 21 is movably sleeved with a limiting fixing plate, and one end of the limiting fixing plate is fixed to one corner of the square column at the end of the disc seat 1, so as to ensure that the main spring pressure rod 21 is more stable and firm when subjected to force. A limiting plate is fixed on the right side of the square column at the end of the disc seat 1, and a top rod component 24 is movably inserted through the limiting plate. The top rod component 24 includes a top rod sleeve 25 that movably inserts through the limiting plate, so that one end of the top rod 26 is movably sleeved inside the top rod sleeve 25 and locked and fixed by screws.

[0019] A top rod 26 is inserted into the bottom end of the top rod sleeve 25 to press and move the semi-circular support plate 5 downward, and to drive the movable semi-cylinder 3 to slide on the side of the fixed semi-cylinder 2. A spring limiting block 30 is sleeved at the bottom end of the top rod 26, and a spring member 27 is sleeved on the outside of the top rod 26, so that the locking block 17 automatically rebounds when it is unlocked by the top block 4. The top end of the spring member 27 is limited at the bottom end of the top rod sleeve 25, and the bottom end of the spring member 27 is limited by the spring limiting block 30 at the bottom of the top rod 26. The spring limiting block 30 is fixedly welded to the inside of the fixed plate 13, so that the spring member 27 is limited and fixed on the top rod 26 to maintain elasticity. The bottom of the top rod 26 is movably pushed against the right side of the end of the semi-circular support plate 5. The end of the semi-circular support plate 5 is symmetrically provided with mounting plates 12, and the vertical side of the mounting plates 12 is welded to the inner wall of the movable semi-cylinder 3.

[0020] The movable half-cylinder 3 has through holes 16 on both the front and rear walls at the upper end of its interior. The bushing 23 fixed on the mounting plate 12 is movably inserted into the through hole 16 through the movable half-cylinder 3, serving as a fulcrum for sliding and locking the movable half-cylinder 3. The mounting plate 12 has fixed plates 13 symmetrically fixed to the bottom right end of the disc seat 1, allowing the sliding shaft 15 to be movably positioned between the inner sides of the fixed plates 13. The fixed plates 13 have movable grooves 14, and the sliding shaft 15 is slidably positioned in the movable grooves 14, which facilitates the sliding and locking combination of the semicircular support plate 5 and the movable half-cylinder 3. A locking block 17 is sleeved and fixed on the sliding shaft 15, which facilitates the locking and unlocking of the combination of the movable half-cylinder 3 and the fixed half-cylinder 2.

[0021] Both sides of the inner wall of the mounting plate 12 are fixed with bushings 23. The bushings 23 are movably inserted through both ends of the sliding shaft 15 and located on the outer sides of the fixed plate 13. The locking block 17 movably sleeved on the sliding shaft 15 is movably limited to the inner side of the fixed plate 13, which facilitates the sliding separation of the movable half cylinder 3 from the fixed half cylinder 2 to discharge the slag. On one side of the movable groove 14 and inside the fixed plate 13, a top block 4 is movably installed by a pin to lock and unlock the locking block 17. It is used to lock the locking block 17, so that the movable half cylinder 3 and the fixed half cylinder 2 are locked together. The connecting seat 22 connected to the main spring pressure rod 21 is movably connected to the linkage block 28 by a pin. The linkage block 28 is engaged and fixed at the bottom of one side of the top block 4.

[0022] Specifically, during use, the force of external pressing is transmitted to the main spring pressure rod component 11, causing the main spring pressure rod 21 in the main spring pressure rod component 11 to move downward inside the spring sleeve 19 after being subjected to force. The downward movement of the main spring pressure rod 21 drives the connecting seat 22 to push the linkage block 28 downward, which in turn causes the linkage block 28 to drive the left end of the top block 4 to move downward. The top block 4 is slidably connected to the bottom of the disc seat 1 of the fixed half cylinder 2 by means of a pin with the fixing plate 13. When subjected to force, one end of the top block 4 slides to one side.

[0023] When the main spring rod 21 in the fixed half-cylinder 2 drives the linkage block 28 through the connecting seat 22 to drive the left end of the top block 4 to move upward, the right end of the top block 4 moves downward and disengages from the locking block 17, so that the locking block 17 is in the unlocked state. The unlocking of the locking block 17 allows the movable half-cylinder 3 to slide downward in the movable groove 14 through the sliding shaft 15. The downward movement of the sliding shaft 15 allows the movable half-cylinder 3 to slide downward through the bushing 23, so that the entire movable half-cylinder 3 and the B half-cylinder part 8 can slide downward. The movable half-cylinder 3 is installed in the movable groove 14 on the bottom fixing plate 13 of the disc seat 1 through the sliding shaft 15. After the movable half-cylinder 3 slides down, the external pile driver can be controlled to make the movable half-cylinder drill teeth 10 hang on the ground, thereby dragging the movable half-cylinder 3 to open the slag discharge and discharge the slag, thereby achieving the effect of silent slag discharge. When the movable half-cylinder 3 is attracted by the slag and cannot fall off freely, the top rod 26 presses through the external transmission force and transmits the force to the semi-circular support plate 5, so that the movable half-cylinder 3 falls off and opens the slag discharge.

[0024] After slag removal, the movable half-cylinder 3 returns to its original position and forms a cylindrical shape with the fixed half-cylinder 2. It is then pressed vertically into the ground, causing the locking hook 9 on the detached movable half-cylinder 3 to return to the locking groove 7 of the fixed half-cylinder 2. Simultaneously, the locking block 17 returns to the top block 4 in the fixed half-cylinder 2 and locks in place, making the drill bit more secure and durable during operation. This allows for the next round of rotary drilling, making the process convenient, quick, and further improving work efficiency.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An open-body silent drill bit, comprising a disc base (1), wherein a fixed half-cylinder (2) is fixedly mounted on the left side of the bottom of the disc base (1), and a movable half-cylinder (3) is movably mounted on the right side of the fixed half-cylinder (2) and located at the bottom of the disc base (1), and a semi-circular support plate (5) is fixedly mounted on the inner side of the movable half-cylinder (3), characterized in that: The bottom of the fixed half-cylinder (2) is provided with a half-cylinder A (6), and both ends of the bottom right side of the half-cylinder A (6) are provided with locking grooves (7). The bottom of the movable half-cylinder (3) is provided with a half-cylinder B (8), and both the front and rear ends of the bottom of the half-cylinder B (8) are provided with locking hooks (9) that lock with the locking grooves (7). The left side of the end of the disc seat (1) is provided with a main spring pressure rod component (11) installed through a semi-circular slot. The right side of the square column at the end of the disc seat (1) is fixed with a limiting plate, and a top rod component (24) is movably passed through the limiting plate. A mounting plate (12) is symmetrically fixed to the end of the semi-circular support plate (5). A fixing plate (13) is symmetrically fixed to the right bottom of the disc base (1) on the inner side of the mounting plate (12). A movable groove (14) is provided on each fixing plate (13). A sliding shaft (15) is slidably provided in the movable groove (14). A locking block (17) is sleeved and fixed on the sliding shaft (15). A top block (4) for locking or unlocking the locking block (17) is movably installed on one side of the movable groove (14) and on the inner side of the fixing plate (13) through a pin.

2. The open-body silent drill bit according to claim 1, characterized in that: The main spring pressure rod component (11) includes a cylindrical seat (18) fixed on the left side of the end of the disc seat (1). A spring sleeve (19) is fixed inside the cylindrical seat (18). A limit block (20) is fixed at the bottom end of the spring sleeve (19). The left end of the limit block (20) extends to the concave surface of the right end of the mounting plate (12). A main spring pressure rod (21) is movably arranged inside the spring sleeve (19). The bottom end of the main spring pressure rod (21) penetrates to the bottom of the limit block (20) and is fixed with a connecting seat (22). The upper end of the main spring pressure rod (21) is movably sleeved with a limit fixing plate. One end of the limit fixing plate is fixed to one corner of a square column provided at the end of the disc seat (1).

3. The open-body silent drill bit according to claim 1, characterized in that: The mounting plate (12) has bushings (23) fixedly inserted on both sides of the inner side wall. The bushings (23) are movably inserted through both ends of the sliding shaft (15) and located on the outer sides of the fixed plate (13). The locking block (17) movably sleeved on the sliding shaft (15) is movably limited to the inner side of the fixed plate (13).

4. The open-body silent drill bit according to claim 1, characterized in that: The top rod component (24) includes a top rod sleeve (25) that is movably inserted through the limiting plate. A top rod (26) is inserted into the bottom end of the top rod sleeve (25). A spring limiting block (30) is sleeved on the bottom end of the top rod (26). A spring element (27) is sleeved on the outside of the top rod (26). The top end of the spring element (27) is limited at the bottom end of the top rod sleeve (25), and the bottom end of the spring element (27) is limited by the spring limiting block (30) at the bottom of the top rod (26). The spring limiting block (30) is fixedly welded to the inside of the fixing plate (13). The bottom of the top rod (26) is movably pushed against the right side of the end of the semi-circular support plate (5).

5. The open-body silent drill bit according to claim 2, characterized in that: The connecting seat (22) connected to the main spring pressure rod (21) is movably connected to the linkage block (28) via a pin. The linkage block (28) is engaged and fixed inside the bottom end of one side of the top block (4).

6. The open-body silent drill bit according to claim 1, characterized in that: The bottom ends of the A semi-cylinder (6) and the B semi-cylinder (8) are respectively provided with fixed semi-cylinder drill teeth (29) and movable semi-cylinder drill teeth (10), and the fixed semi-cylinder drill teeth (29) and movable semi-cylinder drill teeth (10) are obliquely symmetrical inward extending structures.

7. The open-body silent drill bit according to claim 3, characterized in that: The movable half-cylinder (3) has through holes (16) on both the front and rear walls at the upper end of the interior. The movable half-cylinder (3) allows the bushing (23) fixed on the mounting plate (12) to move into the through hole (16) through the through hole (16).

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