Polygonal drill bit and drilling equipment

Abstract

The utility model discloses a polygonal drill bit and drilling equipment, the polygonal drill bit comprises a drill bit outer shell with the cross section of a polygonal structure, and a rammer block capable of sliding up and down and a driving assembly capable of driving the rammer block to move up and down are arranged in the drill bit outer shell. The drilling equipment comprises a vehicle body, a lifting assembly and a polygonal drill bit. When a polygonal hole is drilled, a traditional rotary excavating drill bit is used for drilling a round hole, then the polygonal drill bit disclosed by the utility model is replaced, and the polygonal hole is drilled in a manner of continuously lifting and descending a rammer for finishing. The polygonal hole drilling machine has the advantages that the polygonal hole is drilled in a continuous rammer trimming mode, and compared with a traditional mode that all edges of the polygonal hole are trimmed through an excavator, the operation difficulty is low, and the drilling efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a polygonal drill bit and drilling equipment. Background Art

[0002] In large construction sites, CFG drilling rigs are often needed for drilling. Traditional CFG drilling rigs can only drill round holes. For some special operations, round holes cannot meet the needs of the operation. For example, for the installation of anti-slip piles, square piles have a larger cross-sectional area and a more stable shape than round piles, and can withstand greater loads, so anti-slip piles are basically square piles.

[0003] In the prior art, for opening square holes or other polygonal holes, a conventional CFG drill is generally used to first perform circular drilling, and then an excavator is used to sequentially excavate and repair each side of the polygon. However, this method is difficult to operate and requires high technical skills of the operator. Utility Model Content

[0004] In view of this, one of the purposes of the present invention is to provide a polygonal drill bit, which is intended to be able to drill a polygonal hole very easily.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A polygonal drill bit comprises a drill bit outer shell, characterized in that: the cross-section of the drill bit outer shell is a polygonal structure, a connecting shaft is rotatably mounted on the upper part of the drill bit outer shell, a rammer block and a transmission assembly are arranged inside the drill bit outer shell, wherein the rammer block is assembled inside the drill bit outer shell so as to be able to reciprocate up and down, the lower end of the connecting shaft is connected to the power of the transmission assembly, and the outer end of the connecting shaft is used to connect to a power source that drives the rammer block to rotate; when the connecting shaft rotates, it can drive the rammer block to reciprocate up and down inside the drill bit outer shell via the transmission assembly to realize rammer drilling of the drill bit shell.

[0007] By adopting the above structure, the polygonal hole can be drilled very simply by continuously tamping.

[0008] Preferably: the transmission assembly includes a rotating component rotatably mounted inside the drill bit housing and a rack disposed on the rammer block, the rack being vertically disposed on the rammer block, and the rotating component being provided with an arc-shaped tooth segment meshing with the rack; the connecting shaft can directly or indirectly drive the rotating component to rotate, and within a single-turn rotation stroke of the rotating component, when the arc-shaped tooth segment meshes with the rack, the rotation of the rotating component can drive the rammer block to move upward, and when the arc-shaped tooth segment disengages from the rack, the rammer block can fall under its own weight. With the above structure, by continuously rotating the rotating component, the rammer block can continuously move up and down, ensuring that the polygonal drill bit can drill polygonal holes.

[0009] Preferably, the rammer block has a central assembly hole, the number of the racks and rotating parts is four groups, the four groups of racks are symmetrically distributed on both sides of the central assembly hole, the drill bit outer shell is provided with a mounting seat located at the central assembly hole, a worm is vertically rotatably mounted inside the mounting seat, the upper part of the worm is synchronously fixed with the connecting shaft, and the lower part is symmetrically meshed with two groups of worm wheels, the two groups of worm wheels are each rotatably mounted in the mounting seat through a support shaft, the four groups of rotating parts are respectively mounted at the ends of the two support shafts, and the four groups of rotating parts correspond one to one with the four groups of racks. With the above structure, the continuous rotation of the worm gear ensures that the rotating part can rotate continuously, the worm gear can provide a higher reduction ratio, and the rammer block falls to the bottom, and the arc-shaped tooth segment of the rotating part can mesh with the rack on the rammer block, and the central assembly hole makes the overall transmission structure very compact.

[0010] Preferably, the cross section of the drill bit housing is configured to be a triangle, a rectangle, a square, a regular pentagon or a regular hexagon. The above structure can meet the drilling requirements of various polygonal holes.

[0011] Preferably, cutting teeth are arranged on the longitudinal edges of the drill bit outer shell, and the cutting teeth are pick teeth. The above structure can facilitate the polygonal drill bit to hammer downwards and drill holes.

[0012] Preferably, an anti-reversal mechanism is provided between the connecting shaft and the drill bit housing. The above structure can prevent the power source from providing reverse power to force the rotating component to drive the rammer block to move downward, thereby ensuring the service life of the rammer block.

[0013] As a preferred embodiment, a guide rod is provided inside the drill bit housing along its height direction, and the rammer block is slidably sleeved on the guide rod. With the above structure, it can be ensured that the rammer block will not deviate when it descends.

[0014] Preferably, the rotating component is a gear, and the circumference of the gear is composed of a meshing section and a non-meshing section. With the above structure, through the design of the meshing section and the non-meshing section, the rotating gear is continuously rotated to achieve continuous up and down movement of the rammer block.

[0015] A second purpose of the utility model is to provide a drilling device.

[0016] A drilling device includes a vehicle body, a lifting assembly and a polygonal drill bit, characterized in that: the lifting assembly includes a column rotatably arranged on one side of the vehicle body, a power head is provided on the side of the column away from the vehicle body, the connecting shaft is poweredly connected to the power head, a winch mechanism is provided on the side of the column close to the vehicle body, and the traction end of the winch mechanism bypasses the top of the column and is connected to the power head.

[0017] By adopting the above structure, the vehicle body ensures the horizontal position adjustment of the polygonal drill bit, the winch mechanism and the column ensure the vertical position adjustment of the polygonal drill bit, and then cooperates with the power head to provide power, and drives the rammer block to reciprocate up and down inside the drill bit outer shell through the transmission assembly, finally realizing the drilling of polygonal holes by rammer method.

[0018] The third purpose of the utility model is to provide a polygonal hole drilling method.

[0019] A polygonal hole drilling method, characterized in that it comprises the following steps:

[0020] Step 1: Use a traditional rotary drill to drill a circular hole;

[0021] Step 2: Replace the conventional rotary drill in step 1 with the drilling equipment;

[0022] Step 3: Move the vehicle body so that the center line of the bottom of the drill bit housing is aligned with the center of the circular hole in step 1;

[0023] Step 4: driving the hoisting mechanism to place the polygonal drill bit above the circular hole described in step 1;

[0024] Step 5: Drive the power head to rotate the connecting shaft. The rotation of the connecting shaft causes the transmission assembly to drive the rammer block to reciprocate up and down inside the drill bit shell, ultimately achieving rammer drilling.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] 1. The polygonal drill bit and drilling equipment provided by the utility model are adopted, and the rotating parts are continuously rotated. Through the cooperation of the arc-shaped tooth segment and the rack, the continuous up and down movement of the rammer block can be realized. The polygonal drill bit is placed on the circular hole dug in advance, and the polygonal hole is drilled through continuous rammer shaping. Compared with the traditional method of using an excavator to dig and trim each side of the polygonal hole, the actual operation difficulty of the utility model is low and the drilling efficiency is high.

[0027] 2. The coordination of four sets of gears and racks can improve the uniformity and stability of force. The worm gear inside the transmission assembly can provide a high reduction ratio to ensure that the gears rotate at a low speed and that the meshing area of ​​the gears does not reach the lowest point before the rammer block falls to the lowest position, thereby helping to achieve the continuous lifting function.

[0028] 3. Due to the anti-reversal structure, the drilling equipment drives the drill bit shell to rotate in the opposite direction, and can also reshape the square hole into a round hole again, thereby expanding the round hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the driving assembly A (the drill bit housing 1 is hidden);

[0030] Figure 2 is a three-dimensional cross-sectional schematic diagram of a polygonal drill bit;

[0031] Figure 3 It is a schematic diagram of the power transmission structure of the polygonal drill bit;

[0032] Figure 4 It is a schematic structural diagram of the rotating component 4;

[0033] Figure 5 It is a structural schematic diagram of the anti-reversal mechanism 10;

[0034] Figure 6 This is a schematic diagram of the structure of the drilling equipment. DETAILED DESCRIPTION

[0035] The utility model is further described below in conjunction with embodiments and drawings.

[0036] Embodiment 1:

[0037] like Figure 1 and Figure 2 As shown, a polygonal drill bit comprises a drill bit outer shell 1 with a polygonal cross section, a connecting shaft 2 is rotatably mounted on the upper end of the drill bit outer shell 1, a rammer block 3 and a transmission assembly A are installed inside the drill bit outer shell 1, wherein the rammer block 3 is mounted inside the drill bit outer shell 1 so as to be able to reciprocate up and down, the lower end of the connecting shaft 2 is connected to the transmission assembly A for power, and the outer end of the connecting shaft 2 is used to connect to a power source that drives it to rotate.

[0038] Based on this, when the connecting shaft 2 rotates, the rammer block 3 can be driven to reciprocate up and down inside the drill bit outer shell 1 through the transmission component A, thereby realizing the rammer drilling of the drill bit outer shell.

[0039] Furthermore, the cross-section of the drill bit outer shell 1 of the polygonal drill bit can be a triangle, a rectangle, a square, a regular pentagon or a regular hexagon. In the present embodiment, the cross-section of the drill bit outer shell 1 is preferably a square as an example, and the rammer block 3 corresponding to the drill bit outer shell 1 is also set to a square structure.

[0040] like Figure 1 As shown, in this embodiment, the transmission assembly A includes a rotating component 4 rotatably mounted inside the drill bit outer shell 1 and a rack 5 arranged on the rammer block 3. The rack 5 is vertically mounted on the rammer block 3, and an arc-shaped tooth segment 4a meshing with the rack 5 is formed on the rotating component 4. The connecting shaft 2 can directly or indirectly drive the rotating component 4 to rotate. Within a single-circle rotation stroke of the rotating component 4, when the arc-shaped tooth segment 4a meshes with the rack 5, the rotation of the rotating component 4 can drive the rammer block 3 to move upward, and when the arc-shaped tooth segment 4a is separated from the rack 5, the rammer block 3 can fall due to its own gravity.

[0041] like Figure 4 As shown, in this embodiment, the rotating component 4 is a gear, and a meshing section and a non-meshing section 4 b are formed in the circumference of the gear, wherein the meshing section corresponds to the arc-shaped tooth section 4 a of the rotating component 4 .

[0042] In order to make the overall structure of the polygonal drill more compact, Figure 2 As shown, a central assembly hole 3a is formed inside the ram block 3, and the rack 5 is integrally formed or fixed on the inner hole wall of the central assembly hole 3a. In this embodiment, the connecting shaft 2 drives the rotating component 4 to rotate by an indirect drive method. For details, see Figure 2 and Figure 3 A mounting seat 6 located at the central assembly hole 3a is fixedly installed inside the drill bit outer shell 1, and the rotating component 4 is rotatably installed on the mounting seat 6. A worm 7 is vertically rotatably installed inside the mounting seat 6, the upper end of the worm 7 is synchronously fixedly connected to the connecting shaft 2, and the lower end is meshed with a worm wheel 8, which is rotatably installed inside the mounting seat 6 through a support shaft 9, and the rotating component 4 is fixedly installed at the end of the support shaft 9. Based on this, the worm 7 is continuously driven to rotate by the power source, thereby driving the worm wheel 8 to rotate continuously, and the worm wheel 8 then drives the rotating component 4 to rotate continuously through the support shaft 9, so that the rammer block 3 continuously moves up and down, and the cooperation between the worm wheel 8 and the worm 7 provides a great reduction ratio. Such a design can avoid the arc-shaped tooth segment 4a colliding with the rack 5 due to the rotating speed of the rotating component 4 being too fast during the falling process of the rammer block 3.

[0043] like Figure 1As shown, a guide rod 11 is vertically arranged inside the drill bit housing 1, and the rammer block 3 is slidably arranged on the guide rod 11. Such a design ensures that the rammer block 3 will not deviate when moving up and down. Figure 2 As shown, cutting teeth 1a are provided on the longitudinal edges of the drill bit outer shell 1. In this embodiment, the cutting teeth 1a are pick teeth. Such a design is more conducive to the polygonal drill bit to hammer downward to drill holes.

[0044] In order to ensure that the rammer block 3 is subjected to more uniform force during the rising process, in the present embodiment, four groups of rotating parts 4 and racks 5 are provided corresponding to the rectangular rammer block 3. The four groups of racks 5 are symmetrically distributed on both sides of the central assembly hole 3a. The worm 7 is symmetrically meshed with two groups of worm wheels 8. The two groups of worm wheels 8 are each rotatably mounted in the mounting seat 6 through a support shaft 9. The four rotating parts 4 are respectively assembled at the ends of the two support shafts 9, and the four groups of rotating parts 4 correspond one by one to the four groups of racks 5.

[0045] During the application of the above structure, it is necessary to ensure that the rotation direction provided by the power source can enable the rotating component 4 to drive the rammer block 3 to continuously lift. When the rotation direction provided by the power source changes due to operator error, the rotating component 4 will drive the rammer block 3 to move downward. When the rammer block 3 is at the lowest position, the rotating component 4 drives the rammer block 3 to move downward, which will cause damage to the arc-shaped tooth segment 4a of the rotating component 4 and the rack 5, ultimately affecting the service life of the transmission component A. To prevent the above situation from occurring, in this embodiment, an anti-reversal mechanism 10 is provided between the connecting shaft 2 and the drill bit outer shell 1. For details, see Figure 2 and Figure 5 .

[0046] The anti-reversal mechanism 10 includes a ratchet tooth 10a fixedly sleeved on the end of the worm 7 away from the worm wheel 8 and a locking plate 10b matched with the ratchet tooth 10a. When the rotation direction provided by the power source rotates in the normal rotation direction, the worm 7 will drive the ratchet tooth 10a to rotate. Figure 5 At this time, the ratchet teeth 10a rotate counterclockwise and are not affected by the locking plate 10b. The power source can normally drive the rotating component 4 to rotate continuously, thereby driving the rammer block 3 to continuously lift. When the rotation direction provided by the power source is opposite to the normal rotation direction due to human error, the rotation of the ratchet teeth 10a is affected by the locking plate 10b and locked. At this time, the worm 7 cannot drive the rotating component 4 to rotate, thereby ensuring the service life of the transmission component A.

[0047] When the ratchet teeth 10a and the locking disk 10b are in a locked state, the power source continues to output, but the output end of the power source cannot rotate, which will cause the power source to be overloaded by heat, affecting the service life of the power source. In this embodiment, the locking disk 10b is fixedly mounted on the connecting block 16, the connecting block 16 is fixedly sleeved on the connecting shaft 2, and the connecting block 16 is fixedly connected to each guide rod 11. With such a design, when the ratchet teeth 10a and the locking disk 10b are in a locked state, the power source can drive the connecting block 16 to rotate, thereby driving the entire drill bit outer shell 1 and the rammer block 3 to rotate, avoiding overload of the power source, and at the same time, the rotation of the polygonal drill bit can also play the role of expanding the hole.

[0048] Embodiment 2:

[0049] like Figure 6 As shown, a drilling device includes a vehicle body 12, a lifting assembly B, and a polygonal drill bit described in Example 1. In this embodiment, the vehicle body 12 adopts a double crawler structure, and the lifting assembly B includes a column 13 rotatably mounted on one side of the vehicle body 12. A power head 14 is provided on the side of the column 13 away from the vehicle body 12. A drill rod 14a is passed through the power head 14. The bottom of the drill rod 14a is fixedly mounted on the connecting shaft 2. The power head 14 is the power source of the polygonal drill bit and is used to provide power to the polygonal drill bit. A hoisting mechanism 15 is fixedly mounted on the side of the column 13 close to the vehicle body 12. The traction end of the hoisting mechanism 15 bypasses the top of the column 13 and is connected to the drill rod 14a. In this embodiment, a lifter 17 is fixedly mounted on the end of the drill rod 14a, and the traction end of the hoisting mechanism 15 is connected to the lifter 17.

[0050] With such a design, the vehicle body 12 realizes the adjustment of the lateral position of the polygonal drill bit, the winch mechanism 15 realizes the adjustment of the longitudinal position of the polygonal drill bit, the power head 14 provides power for the polygonal drill bit, and the polygonal drill bit realizes the drilling of the polygonal hole by the drilling equipment through continuous tamping.

[0051] Furthermore, the column 13 and the vehicle body 12 are rotatably mounted together in an articulated manner, and a variable amplitude mechanism 18 is fixedly mounted between the column 13 and the vehicle body 12. In this embodiment, the variable amplitude mechanism 18 is a hydraulic cylinder. With such a design, the variable amplitude mechanism 18 can keep the drilling equipment in a vertical state when in use, and when the drilling equipment is not in use, the variable amplitude mechanism 18 can rotate the column 13 to a horizontal state, thereby reducing the longitudinal space occupied by the drilling equipment and also reducing safety hazards.

[0052] In this embodiment, a slide rail 13a is formed on the side of the column 13 away from the vehicle body 12, and the power head 14 is slidably installed on the column 13. Such a design can prevent the drilling equipment from having a large swing when adjusting the longitudinal or lateral position of the polygonal drill bit, thereby ensuring the accuracy of the polygonal drill bit position adjustment.

[0053] Embodiment three:

[0054] A method for drilling a polygonal hole comprises the following steps:

[0055] Step 1: First use a traditional rotary drill to drill a round hole.

[0056] Step 2: Replace the conventional rotary drill with the drilling equipment described in Example 2.

[0057] Step three: Move the vehicle body 12 so that the center line of the bottom of the drill bit outer shell 1 is aligned with the center of the circular hole in step one.

[0058] Step 4: driving the hoisting mechanism 15 to place the polygonal drill bit above the circular hole drilled in step 1;

[0059] Step 5: Drive the power head 14 to rotate the connecting shaft 2. The rotation of the connecting shaft 2 causes the transmission assembly A to drive the rammer block 3 to reciprocate up and down inside the drill bit outer shell 1, and finally realize the rammer drilling.

[0060] Using this method, we only need to place the polygonal drill bit on the round hole, and use continuous tamping to shape the round hole into the polygonal hole we need. Compared with the use of excavators to repair and shape multiple sides of the transmission, it is not only less difficult to operate, but also more time-saving and labor-saving.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A polygonal drill bit, comprising a drill bit outer shell (1), characterized in that: The cross section of the drill bit outer shell (1) is a polygonal structure. The upper part of the drill bit outer shell (1) is rotatably equipped with a connecting shaft (2). A rammer block (3) and a transmission assembly (A) are arranged inside the drill bit outer shell (1). The rammer block (3) is mounted inside the drill bit outer shell (1) so as to be capable of reciprocating up and down. The lower end of the connecting shaft (2) is connected to the transmission assembly (A) by power, and the outer end of the connecting shaft (2) is used to connect to a power source that drives the connecting shaft to rotate. The connecting shaft (2) rotates and can drive the rammer block (3) to reciprocate up and down inside the drill bit outer shell (1) via the transmission assembly (A), so as to realize rammer drilling of the drill bit outer shell (1).

2. The polygonal drill bit according to claim 1, characterized in that: The transmission assembly (A) comprises a rotating component (4) rotatably mounted inside the drill bit outer shell (1) and a rack (5) arranged on the rammer block (3); the rack (5) is vertically arranged on the rammer block (3); and the rotating component (4) is provided with an arc-shaped tooth segment (4a) meshing with the rack (5); The connecting shaft (2) can directly or indirectly drive the rotating component (4) to rotate. Within a single-turn rotation stroke of the rotating component (4), when the arc-shaped tooth segment (4a) is engaged with the rack (5), the rotation of the rotating component (4) can drive the rammer block (3) to move upward. When the arc-shaped tooth segment (4a) is disengaged from the rack (5), the rammer block (3) can fall down under its own weight.

3. The polygonal drill bit according to claim 2, characterized in that: The rammer block (3) has a central assembly hole (3a), the number of the racks (5) and the number of the rotating parts (4) are four groups, the four groups of racks (5) are symmetrically distributed on both sides of the central assembly hole (3a), the drill bit outer shell (1) is provided with a mounting seat (6) located in the central assembly hole (3a), a worm (7) is vertically rotatably mounted inside the mounting seat (6), the upper part of the worm (7) is synchronously fixedly connected to the connecting shaft (2), and the lower part is symmetrically meshed with two groups of worm wheels (8), the two groups of worm wheels (8) are rotatably mounted in the mounting seat (6) through a support shaft (9), the four groups of rotating parts (4) are respectively mounted on the ends of the two support shafts (9), and the four groups of rotating parts (4) correspond one to one with the four groups of racks (5).

4. The polygonal drill bit according to claim 1, characterized in that: The cross section of the drill bit outer shell (1) is configured as a triangle, a rectangle, a square, a regular pentagon or a regular hexagon.

5. The polygonal drill bit according to claim 1, characterized in that: Cutting teeth are provided on the longitudinal edges of the drill bit outer shell (1), and the cutting teeth are pick teeth.

6. The polygonal drill bit according to claim 1, characterized in that: An anti-reversal mechanism (10) is provided between the connecting shaft (2) and the drill bit outer shell (1).

7. The polygonal drill bit according to claim 1, characterized in that: A guide rod (11) is provided inside the drill bit outer shell (1) along its height direction, and the rammer block (3) is slidably sleeved on the guide rod (11).

8. The polygonal drill bit according to claim 2, characterized in that: The rotating component (4) is a gear, and the circumference of the gear is composed of a meshing section and a non-meshing section.

9. A drilling device, comprising a vehicle body (12), a lifting assembly (B) and a polygonal drill bit according to any one of claims 1 to 8, characterized in that: The lifting assembly (B) comprises a column (13) rotatably arranged on one side of the vehicle body (12); a power head (14) is arranged on the side of the column (13) away from the vehicle body (12); the connecting shaft (2) is dynamically connected to the power head (14); a hoisting mechanism (15) is arranged on the side of the column (13) close to the vehicle body (12); a traction end of the hoisting mechanism (15) bypasses the top of the column (13) and is connected to the power head (14).

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