Crown drill bit

Abstract

The utility model relates to the technical field of crown drill bit, specifically is a crown drill bit, including clamping handle, the upper side of clamping handle is connected with the body of knife, one side fixedly connected with crown drill bit main part of the body of knife, the outer surface array of body of knife is connected with T type board, the lower side array of body of knife is connected with the locating post, the upper side array of clamping handle is set up with the installation groove of T type board adaptation, the bottom end array of clamping handle inside is set up with the clamping groove of locating post adaptation, the utility model discloses through the automatic joint cooperation of elastic embedding block and recess, cooperate T type board, locating post and so on auxiliary positioning structure, realized the quick primary fixation and accurate alignment of crown drill bit, this design has simplified the installation step, has improved the dismounting efficiency of blade, and the secondary locking of bolt no.

Description

Technical Field

[0001] This utility model relates to the field of crown drill bit technology, specifically a crown drill bit. Background Technology

[0002] Crown drill bits are widely used in the construction industry. They can drill or cut in hard materials such as concrete, stone, and brick without generating excessive dust and noise, which is very effective in protecting workers' health and reducing on-site noise.

[0003] In actual use, the crown drill bit body and the clamping shank are usually connected and fixed by bolts, which makes disassembly and assembly cumbersome and requires assembly tools. After long-term use, thread wear or stripping may occur, which will affect the disassembly and assembly efficiency of the crown drill bit. Utility Model Content

[0004] The purpose of this invention is to provide a crown drill bit to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A crown drill bit includes a clamping shank, a blade is clamped to the upper side of the clamping shank, a crown drill bit body is fixedly connected to one side of the blade, T-plates are arrayed on the outer surface of the blade, positioning pins are arrayed on the lower side of the blade, mounting grooves adapted to the T-plates are arrayed on the upper side of the clamping shank, and slots adapted to the positioning pins are arrayed on the bottom end of the inside of the clamping shank.

[0007] The outer surface of the clamping handle is provided with a second groove and a third groove in an array. The outer surface of the blade is provided with a first groove in an array. Two guide rods are slidably connected inside the first groove. An insert block adapted to the third groove is fixedly connected to one side of the two guide rods. Two first springs are fixedly connected between the insert block and the first groove. One side of the insert block is engaged inside the third groove.

[0008] Preferably, a round seat is fixedly connected to the lower side of the blade, and a round groove adapted to the round seat is opened at the bottom of the inside of the clamping handle, and the outer surface of the round seat is engaged with the inside of the round groove.

[0009] Preferably, a circular hole is provided on the lower side of the clamping handle, and a bolt is connected to the internal thread of the circular hole. An internal threaded hole adapted to the bolt is provided on the lower side of the circular seat.

[0010] Preferably, a clamping plate is connected in an array on one side of the inside of the blade, and a fixing seat is connected in an array on the outer surface of the clamping handle. An embedding groove adapted to the clamping plate is opened on one side of the fixing seat. One side of the clamping plate is snapped into the embedding groove. A bolt three is threadedly connected to one side of the fixing seat. One side of the bolt three passes through the fixing seat and extends into the inside of the clamping plate.

[0011] Preferably, one side of the clamping handle is engaged with a through transverse groove, and both ends of the round base are engaged with blocks, with a latching groove on one side of each block.

[0012] Preferably, one side of the T-shaped plate is snapped into the inside of the mounting groove, one side of the positioning post is snapped into the inside of the slot, and one side of the second groove is threaded with a bolt, one side of the bolt passing through the clamping handle and extending to one side of the embedded block.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model achieves rapid initial fixing and precise alignment of crown drill bits by automatically engaging the elastic embedded block with the groove, in conjunction with auxiliary positioning structures such as T-plates and positioning posts. This design simplifies the installation steps and improves the efficiency of bit assembly and disassembly. At the same time, the secondary tightening of bolt one ensures the stability of the embedded block and effectively prevents the bit from loosening during use.

[0015] 2. This utility model utilizes the stop block for positioning, the cooperation between the bolt two and the internal threaded hole, and the locking of the card plate and the embedded groove with the bolt three for locking, forming a multi-level locking structure. This design further enhances the overall stability of the blade after installation, avoids displacement or vibration during processing, and ensures the reliability and accuracy of long-term use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a utility model Figure 1 Installation diagram of the guide rod and the embedded block;

[0019] Figure 3 This is a utility model Figure 1 Schematic diagram of the structure of the T-shaped plate and positioning column;

[0020] Figure 4 This is a utility model Figure 2A structural diagram of the clamping handle, slot, and mounting groove;

[0021] Figure 5 This is a utility model Figure 1 Installation diagram of the middle plate and fixing base;

[0022] The attached figures are labeled as follows:

[0023] 1. Clamping handle; 2. Blade; 3. Crown drill bit body; 4. T-plate; 5. First groove; 6. Positioning pin; 7. Guide rod; 8. Embedding block; 9. First spring; 10. Slot; 11. Mounting slot; 12. Circular groove; 13. Second groove; 14. Bolt one; 15. Circular seat; 16. Stop block; 17. Clip groove; 18. Third groove; 19. Internal threaded hole; 20. Circular hole; 21. Bolt two; 22. Transverse groove; 23. Fixing seat; 24. Embedding groove; 25. Clamping plate; 26. Bolt three. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1 to 5 As shown, a crown drill bit includes a clamping shank 1, a blade 2 is clamped to the upper side of the clamping shank 1, a crown drill bit body 3 is fixedly connected to one side of the blade 2, T-plates 4 are arrayed on the outer surface of the blade 2, and positioning pins 6 are arrayed on the lower side of the blade 2. By installing and using the T-plates 4 and positioning pins 6, the assembly of the blade 2 can be guided, so that the blade 2 can be installed stably. The upper side of the clamping shank 1 is provided with mounting grooves 11 that are adapted to the T-plates 4, and the bottom of the inside of the clamping shank 1 is provided with slots 10 that are adapted to the positioning pins 6.

[0026] The outer surface of the clamping handle 1 is provided with a second groove 13 and a third groove 18 arranged in an array. The outer surface of the blade 2 is provided with a first groove 5 arranged in an array. Two guide rods 7 are slidably connected inside the first groove 5. An insert block 8 adapted to the third groove 18 is fixedly connected to one side of the two guide rods 7. Two first springs 9 are fixedly connected between the insert block 8 and the first groove 5. One side of the insert block 8 is engaged inside the third groove 18.

[0027] A round seat 15 is fixedly connected to the lower side of the blade 2. A round groove 12 adapted to the round seat 15 is opened at the bottom of the inside of the clamping handle 1. The outer surface of the round seat 15 is engaged and placed inside the round groove 12.

[0028] A circular hole 20 is provided on the lower side of the clamping handle 1, and a bolt 21 is connected to the internal thread of the circular hole 20. An internal threaded hole 19 that is adapted to the bolt 21 is provided on the lower side of the circular seat 15.

[0029] One side of the blade 2 is connected to a clamping plate 25, and the outer surface of the clamping handle 1 is connected to a fixing seat 23. One side of the fixing seat 23 is provided with an insertion groove 24 that is adapted to the clamping plate 25. One side of the clamping plate 25 is snapped into the insertion groove 24. One side of the fixing seat 23 is threaded with a bolt 26. One side of the bolt 26 passes through the fixing seat 23 and extends into the interior of the clamping plate 25.

[0030] One side of the clamping handle 1 is engaged with a through transverse groove 22, and both ends of the round base 15 are engaged with a stop block 16. Each of the two stop blocks 16 has a latching groove 17 on one side, which can be used to adjust the position of the stop block 16, making it convenient to use.

[0031] One side of the T-plate 4 is snapped into the inside of the mounting groove 11, and one side of the positioning post 6 is snapped into the inside of the slot 10. One side of the second groove 13 is threaded with a bolt 14. One side of the bolt 14 passes through the clamping handle 1 and extends to one side of the embedded block 8. By setting the bolt 14, the bolt 14 can be turned in the opposite direction to release the limit on the embedded block 8. In this way, the elastic embedded block 8 is pressed at the same time, so that the embedded block 8 retracts, so as to disassemble the crown drill bit body 3 and the blade 2.

[0032] The working principle of the crown drill bit provided by this utility model is as follows:

[0033] By aligning the blade 2 of the crown drill bit body 3 into the clamping handle 1, and then simultaneously pressing the four elastic insert blocks 8, the insert blocks 8 retract into the first groove 5. Then, the blade 2 is moved further until it is fully inserted into the clamping handle 1. After the blade 2 is installed, the four elastic insert blocks 8 are released and automatically extend to engage with the third groove 18 for initial fixation of the crown drill bit. Then, as the blade 2 is installed and used, the T-plate 4 and positioning post 6 at the blade 2 can be sequentially engaged with the mounting groove 11 and the slot 10 for auxiliary positioning of the crown drill bit body 3. At the same time, the bolts 14 are tightened to fix the bolts 14 into the insert blocks 8 for secure locking of the insert blocks 8, making the crown drill bit less prone to loosening. This locking mechanism allows for convenient disassembly and assembly of the crown drill bit, effectively improving the efficiency of disassembly and assembly.

[0034] By moving the two stops 16 at the round seat 15 out, the two stops 16 can be fixed at the transverse groove 22 to limit the position of the transverse groove 22. Then, the second bolt 21 is tightened to install the second bolt 21 into the internal thread hole 19 of the second bolt 21, which helps to further lock the crown drill bit. Then, with the installation of the cutter body 2, the retaining plate 25 at the cutter body 2 will also be engaged into the embedded groove 24 of the fixed seat 23. Then, the third bolt 26 is tightened to fix the third bolt 26 into the inside of the retaining plate 25, so as to enhance the stability of the crown drill bit during assembly.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A crown drill bit, comprising a clamping shank (1), characterized in that, The upper side of the clamping handle (1) is fitted with the blade (2), and the side of the blade (2) is fixedly connected with the crown drill bit body (3). The outer surface of the blade (2) is connected with a T-shaped plate (4), and the lower side of the blade (2) is connected with a positioning post (6). The upper side of the clamping handle (1) is provided with an installation groove (11) that matches the T-shaped plate (4), and the bottom of the inside of the clamping handle (1) is provided with a slot (10) that matches the positioning post (6). The outer surface of the clamping handle (1) is provided with a second groove (13) and a third groove (18) respectively. The outer surface of the blade (2) is provided with an array of first grooves (5). Two guide rods (7) are slidably connected inside the first groove (5). An insert block (8) adapted to the third groove (18) is fixedly connected to one side of the two guide rods (7). Two first springs (9) are fixedly connected between the insert block (8) and the first groove (5). One side of the insert block (8) is snapped into the inside of the third groove (18).

2. A crown drill bit according to claim 1, characterized in that, A round seat (15) is fixedly connected to the lower side of the blade (2). A round groove (12) adapted to the round seat (15) is opened at the bottom of the inside of the clamping handle (1). The outer surface of the round seat (15) is snapped into the inside of the round groove (12).

3. A crown drill bit according to claim 1, characterized in that, The clamping handle (1) has a circular hole (20) on its lower side, and a bolt (21) is threadedly connected inside the circular hole (20). The circular seat (15) has an internal threaded hole (19) that is compatible with the bolt (21) on its lower side.

4. A crown drill bit according to claim 1, characterized in that, One side of the blade (2) is connected to a card plate (25), and the outer surface of the clamping handle (1) is connected to a fixing seat (23). One side of the fixing seat (23) is provided with an embedding groove (24) that is adapted to the card plate (25). One side of the card plate (25) is snapped into the inside of the embedding groove (24). One side of the fixing seat (23) is threaded with a bolt three (26). One side of the bolt three (26) passes through the fixing seat (23) and extends into the inside of the card plate (25).

5. A crown drill bit according to claim 2, characterized in that, One side of the clamping handle (1) is engaged with a through transverse groove (22), and both ends of the round seat (15) are engaged with stop blocks (16), and one side of each stop block (16) is provided with a latching groove (17).

6. A crown drill bit according to claim 1, characterized in that, One side of the T-shaped plate (4) is snapped into the inside of the mounting groove (11), and one side of the positioning post (6) is snapped into the inside of the slot (10). One side of the second groove (13) is threaded with a bolt (14), and one side of the bolt (14) passes through the clamping handle (1) and extends to one side of the embedded block (8).

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