A screw drill bit having a replaceable drill tip

Abstract

This utility model relates to the field of auger drill bit technology, and more particularly to an auger drill bit with a replaceable drill bit. The drill bit includes a base mounted on its top end, with a circular cavity inside the base. Four locking blocks arranged in a circular array are slidably mounted on the outer wall of the drill bit. A rectangular column is fixedly connected to the top of the circular cavity. Four limiting plates arranged in a circular array and fixedly connected to the top of the locking blocks are mounted on the outer wall of the rectangular column. A trapezoidal block is fixedly connected to the outer wall of the limiting plates. Four rectangular blocks arranged in a circular array are fixedly connected to the top of the outer wall of the drill bit. By rotating a sliding cylinder, the fixing blocks are released, thus removing the limiting effect on the trapezoidal blocks. A first spring is released, causing the trapezoidal blocks to move through the limiting plates, simultaneously moving the locking blocks along a second sliding groove to remove the limiting effect on the drill bit. The operation is simple and convenient, avoiding the use of various tools and improving the efficiency of drill bit disassembly.

Description

Technical Field

[0001] This utility model relates to the field of auger drill bit technology, and in particular to an auger drill bit with replaceable drill bits. Background Technology

[0002] A spiral drill bit is a type of drill bit manufactured with spiral grooves on both sides of the axis starting from a sharp point to improve the ease and accuracy of drilling. The design of these spiral grooves helps to push the cutting material out of the hole and away from the hole, thereby improving the efficiency and accuracy of drilling. It is mainly used for non-circulation drilling in soil layers above the groundwater level, sandy soil layers, dense sand layers containing a small amount of clay, and gravel layers with small particle size.

[0003] Spiral drills primarily rely on rotational motion and a helical structure to achieve drilling. As the spiral drill rotates, the cutting edge of its cutting section cuts the material of the workpiece along a helical line. The helical insert has a large cutting angle, making the cutting process smoother and more efficient. At the same time, the design of the helical grooves helps to remove chips smoothly, reduces the possibility of tool jamming, keeps the tool cool, and reduces friction and wear during cutting.

[0004] However, when the wear of the auger bit reaches a certain level, it needs to be replaced with a new one. Augers are usually mounted on the drilling rig or mounting rod using bolts, nuts, or other fasteners. These fastening methods may vary depending on the manufacturer and the bit model. Therefore, during disassembly and replacement, it is necessary to be familiar with and adapt to different fastening methods, which increases the complexity of the operation. Furthermore, after the bit is disassembled, due to its weight, the worker may not be able to hold it properly, and the bit may fall directly due to its own weight, potentially injuring the worker and increasing the risk of injury. Utility Model Content

[0005] This eliminates the tedious process of disassembling drill bits, improves work efficiency, enhances operational safety, and reduces the risk of personnel injury.

[0006] In view of the above-mentioned problems with drill bit disassembly, this utility model is proposed.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a spiral drill bit with replaceable drill bits.

[0008] The device includes a drill bit, a base mounted on the top of the drill bit, a circular cavity inside the base, four slidable blocks on the outer wall of the drill bit, a rectangular column fixedly connected to the top of the circular cavity, four limiting plates arranged in a circular array and fixedly connected to the top of the slidable blocks on the outer wall of the rectangular column, trapezoidal blocks fixedly connected to the outer wall of the limiting plates, four rectangular blocks arranged in a circular array fixedly connected to the top of the outer wall of the drill bit, two linearly distributed first springs connecting the outer wall of the rectangular column to one end of the limiting plate, and four rectangular holes arranged in a circular array at the bottom of the base, the inner wall of the rectangular holes slidably connected to the outer wall of the rectangular blocks.

[0009] As a preferred embodiment of the present invention, a spiral drill bit with replaceable drill bits is provided, wherein: the outer wall of the drill bit is provided with four slots for easy insertion of the locking block, and the outer wall of the base is provided with four trapezoidal holes for easy sliding of the outer wall of the trapezoidal block.

[0010] As a preferred embodiment of the present invention, a spiral drill bit with replaceable drill bits is provided, wherein: two first sliding grooves are provided on the outer wall of the base in a mirror arrangement, a first slider is slidably connected to the inner wall of the first sliding groove, a sliding cylinder is fixedly connected to the outer wall of the first slider, and four fixed blocks arranged in a circular array are fixedly connected between the two sliding cylinders, and the inner wall of the fixed block is slidably connected to one end of the outer wall of the trapezoidal block.

[0011] As a preferred embodiment of the present invention, a spiral drill bit with replaceable drill bits is provided, wherein: a fixed plate is slidably connected to the bottom end of the locking block, a second slider is fixedly connected to the bottom end of the outer wall of the locking block, a second groove is provided on the inner wall of the fixed plate to facilitate the sliding of the outer wall of the second slider, and one end of the fixed plate is fixedly connected to the inner wall of the circular cavity.

[0012] As a preferred embodiment of the present invention, a spiral drill bit with replaceable drill bits is provided, wherein: the outer wall of the base is provided with a plurality of circular grooves arranged in a circular array, the outer wall of the circular grooves is slidably connected to a limiting post, and a second spring is connected between the bottom end of the limiting post and the bottom end of the circular groove.

[0013] As a preferred embodiment of the present invention, a spiral drill bit with replaceable drill bits is provided, wherein: a sleeve is fixedly connected to the outer wall of the drill bit, and a spiral blade is fixedly connected to the outer wall of the drill bit.

[0014] The beneficial effects of this utility model are:

[0015] 1. By rotating the slide cylinder, the fixed block is removed from the trapezoidal block. The first spring is released and moves the trapezoidal block through the limit plate. At the same time, the locking block moves along the second slide groove to remove the limit on the drill bit. The operation is simple and convenient, avoiding the use of various tools and improving the efficiency of drill bit disassembly.

[0016] 2. After the drill bit is disassembled using the sliding sleeve, it falls due to its own weight, causing the rectangular block to engage with the circular cavity. The rotating sleeve rotates the drill bit, and when the rectangular block moves to the rectangular hole, the drill bit disengages from the machine base. This prevents the drill bit from falling directly and injuring personnel after disassembly, allowing sufficient time to prepare for removing the drill bit and improving operational safety. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the base of this utility model.

[0020] Figure 3 This is a schematic diagram of the limiting plate structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the rectangular block installation structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the mounting structure of the fixing plate of this utility model.

[0023] Figure 6 This is a schematic diagram of the trapezoidal block installation structure of this utility model.

[0024] Figure 7 This is a cross-sectional view of the limiting column of this utility model.

[0025] Figure 8 for Figure 7 Enlarged schematic diagram of point A in the middle.

[0026] Explanation of reference numerals in the attached drawings: 1. Drill bit; 2. Sleeve; 3. Base; 4. Clamping block; 5. Slide cylinder; 6. First slider; 7. First slide groove; 8. Rectangular post; 9. Rectangular hole; 10. Trapezoidal block; 11. Limiting plate; 12. First spring; 13. Rectangular block; 14. Fixing plate; 15. Second slider; 16. Second slide groove; 17. Fixing block; 18. Second spring; 19. Limiting post; 20. Spiral blade. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example

[0028] Reference Figure 1 , Figure 2 , Figure 3 and Figure 6 This first embodiment of the present invention provides a spiral drill bit with replaceable drill bits, including a drill bit 1. A base 3 is mounted on the top of the drill bit 1. A circular cavity is formed inside the base 3. The outer wall of the drill bit 1 is slidably connected to the inner wall of the circular cavity. Four locking blocks 4 arranged in a circular array are slidably mounted on the outer wall of the drill bit 1. The locking blocks 4 are used to lock the base 3 and the drill bit 1 together. A rectangular post 8 is fixedly connected to the top of the circular cavity. The outer wall of the rectangular post 8 is parallel to the outer wall of the locking blocks 4. Four locking blocks arranged in a circular array are mounted on the outer wall of the rectangular post 8. A limiting plate 11 is fixedly connected to the top of the locking block 4. The cross surface of the limiting plate 11 is "L" shaped. The limiting plate 11 is used to drive the locking block 4 to move. A trapezoidal block 10 is fixedly connected to the outer wall of the limiting plate 11. The trapezoidal block 10 is used to drive the limiting plate 11 to move. Four rectangular blocks 13 arranged in a circular array are fixedly connected to the top of the outer wall of the drill bit 1. The rectangular blocks 13 are used to prevent the drill bit 1 from falling directly when it is released from the limiting position of the base 3. A rectangular hole 9 arranged in a circular array is opened at the bottom of the base 3. The rectangular holes 9 allow the rectangular blocks 13 to pass through.

[0029] The outer wall of the drill bit 1 has four slots for easy insertion of the locking block 4. The outer wall of the rectangular column 8 is connected to one end of the limiting plate 11 by two linearly distributed first springs 12. The first springs 12 are used to push the limiting plate 11. The outer wall of the base 3 has four trapezoidal holes for easy sliding of the outer wall of the trapezoidal block 10.

[0030] The outer wall of the base 3 has two mirror-distributed first slide grooves 7. The first slide grooves 7 are used for the slide cylinder 5 to rotate. The inner wall of the first slide groove 7 is slidably connected to the first slider 6. The outer wall of the first slider 6 is fixedly connected to the slide cylinder 5. The slide cylinder 5 is used to drive the fixed block 17 to move. Four fixed blocks 17 distributed in a circular array are fixedly connected between the two slide cylinders 5. The fixed blocks 17 are used to push the trapezoidal block 10. The inner wall of the fixed block 17 is slidably connected to one end of the outer wall of the trapezoidal block 10.

[0031] During use, rotating the slide cylinder 5 causes the fixed block 17 to rotate around the cross-section of the base 3. The inner wall of the fixed block 17 disengages from the trapezoidal hole, and the first spring 12 is released. Since the rectangular column 8 is fixedly connected to the top of the circular cavity, the first spring 12 pushes the limiting plate 11, which in turn pushes the trapezoidal block 10 to move along the trapezoidal hole. At the same time, the locking block 4 disengages from the slot, and the drill bit 1 falls due to its own weight. During installation, the drill bit 1 is lifted to a suitable position, and the slide cylinder 5 is rotated. The slide cylinder 5 causes the fixed block 17 to touch the inclined surface of the trapezoidal block 10. The trapezoidal block 10 is pressed against the limiting plate 11 along the trapezoidal hole, and the limiting plate 11 is pressed against the first spring 12. The first spring 12 is retracted and simultaneously drives the locking block 4 into the slot. Releasing the drill bit 1 completes the installation. Example

[0032] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a fixing plate 14 is slidably connected to the bottom end of the card block 4. The fixing plate 14 is used to support and allow the card block 4 to slide. A second slider 15 is fixedly connected to the bottom end of the outer wall of the card block 4. A second groove 16 is provided on the inner wall of the fixing plate 14 to facilitate the sliding of the outer wall of the second slider 15. The second slider 15 and the second groove 16 are used to limit the card block 4. One end of the fixing plate 14 is fixedly connected to the inner wall of the circular cavity.

[0033] The outer wall of the base 3 has multiple circular grooves arranged in a circular array. The circular grooves are arranged in pairs at both ends of the fixing block 17. The outer wall of the circular groove is slidably connected to the limiting post 19, which is used to limit the fixing block 17. The top of the limiting post 19 is rounded to facilitate the fixing block 17 to push the limiting post 19 to retract. The bottom end of the limiting post 19 is connected to the bottom end of the circular groove, and the second spring 18 is used to push the limiting post 19.

[0034] A sleeve 2 is fixedly connected to the outer wall of the drill bit 1. The sleeve 2 facilitates gripping the drill bit 1. A spiral blade 20 is fixedly connected to the outer wall of the drill bit 1. The spiral blade 20 is used to remove debris during drilling.

[0035] During use, when the drill bit 1 is disassembled by rotating the slide 5, the drill bit 1 falls due to its own weight. The rectangular block 13 holds the drill bit 1 in the circular cavity. The rotating sleeve 2 drives the drill bit 1 to rotate, and the drill bit 1 drives the rectangular block 13 to rotate. When the rectangular block 13 rotates to align with the rectangular hole 9, the weight of the drill bit 1 causes the rectangular block 13 to detach from the base 3. When the drill bit 1 is disassembled or installed, the rotating slide 5 drives the fixing block 17 to rotate. The fixing block 17 presses against the limiting post 19. The limiting post 19 is forced to press against the second spring 18. The second spring 18 is forced to retract. When the fixing block 17 passes the limiting post 19, the second spring 18 is forced to release and push the limiting post 19. The limiting post 19 pops out and blocks the fixing block 17. The operation is then complete.

[0036] The remaining structure is the same as that in Example 1.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A spiral drill bit with a replaceable drill bit, comprising a drill bit (1), wherein a base (3) is mounted on the top end of the drill bit (1), and the base (3) has a circular cavity inside, characterized in that: Four locking blocks (4) are slidably installed on the outer wall of the drill bit (1). A rectangular column (8) is fixedly connected to the top of the circular cavity. A limiting plate (11) is installed on the outer wall of the rectangular column (8) and fixedly connected to the top of the locking block (4). A trapezoidal block (10) is fixedly connected to the outer wall of the limiting plate (11). Four rectangular blocks (13) arranged in a circular array are fixedly connected to the top of the outer wall of the drill bit (1). Two linearly distributed first springs (12) are connected between the outer wall of the rectangular column (8) and one end of the limiting plate (11). Four rectangular holes (9) arranged in a circular array are opened at the bottom of the base (3). The inner wall of the rectangular hole (9) is slidably connected to the outer wall of the rectangular block (13).

2. A spiral drill bit with replaceable drill bits according to claim 1, characterized in that: The outer wall of the drill bit (1) is provided with four slots for easy insertion of the locking block (4), and the outer wall of the base (3) is provided with four trapezoidal holes for easy sliding of the outer wall of the trapezoidal block (10).

3. A spiral drill bit with replaceable drill bits according to claim 2, characterized in that: The outer wall of the base (3) has two first sliding grooves (7) that are mirrored. The inner wall of the first sliding groove (7) is slidably connected to a first slider (6). The outer wall of the first slider (6) is fixedly connected to a sliding cylinder (5). Four fixed blocks (17) arranged in a circular array are fixedly connected between the two sliding cylinders (5). The inner wall of the fixed block (17) is slidably connected to one end of the outer wall of the trapezoidal block (10).

4. A spiral drill bit with replaceable drill bits according to claim 1, characterized in that: The bottom end of the card block (4) is slidably connected to a fixing plate (14), and the bottom end of the outer wall of the card block (4) is fixedly connected to a second slider (15). The inner wall of the fixing plate (14) is provided with a second groove (16) to facilitate the sliding of the outer wall of the second slider (15). One end of the fixing plate (14) is fixedly connected to the inner wall of the circular cavity.

5. A auger drill bit with replaceable drill bits according to claim 1, characterized in that: The outer wall of the base (3) is provided with a plurality of circular grooves arranged in a circular array. A limit post (19) is slidably connected to the outer wall of the circular groove. A second spring (18) is connected between the bottom end of the limit post (19) and the bottom end of the circular groove.

6. A spiral drill bit with replaceable drill bits according to claim 1, characterized in that: A sleeve (2) is fixedly connected to the outer wall of the drill bit (1), and a spiral blade (20) is fixedly connected to the outer wall of the drill bit (1).

Images