Efficient and stable hard rock rotary excavating drill bit

Abstract

The utility model relates to the technical field of hard rock rotary drilling bits, in particular to an efficient and stable hard rock rotary drilling bit which comprises a connecting installation cylinder, a connecting top frame is welded to the top of the connecting installation cylinder, a connecting bottom cylinder is welded to the bottom of the connecting installation cylinder, threaded installation holes are formed in the outer side of the connecting installation cylinder at equal intervals, and installation inserting grooves are formed in the upper end and the lower end of the connecting bottom cylinder at equal intervals. A plurality of through holes are formed in the base; the modular drill bit is detachably arranged on the inner side of the connecting bottom cylinder; the fastening nut is arranged on the outer side of the surface of the internal part of the modular drill bit through threads; and the movable protection mechanism is movably arranged on the outer side of the surface of the connecting mounting cylinder in a sleeving mode, and through connection and cooperation of the arranged connecting bottom cylinder, the modular drill bit and a fastening nut, in the subsequent using process, when the bottom end of the modular drill bit is abraded, the fastening nut can be rapidly and rotationally disassembled, and the use safety of the modular drill bit is improved. And the modular drill bit is simple in structure and convenient and fast to operate.

Description

Technical Field

[0001] This utility model relates to the field of hard rock rotary drilling bit technology, and in particular to a high-efficiency and stable hard rock rotary drilling bit. Background Technology

[0002] Hard rock rotary drilling bits are tools specifically designed for drilling in hard rock formations. They typically use high-strength cemented carbide for their cutting teeth, which possess high hardness and wear resistance, enabling them to withstand the high compressive strength of hard rock formations. The main body of the drill bit is generally made of steel, with the cemented carbide teeth welded to the bit surface.

[0003] When using existing rotary drilling bits, which are used for rotary drilling of hard rock, the ends of the rotary drilling teeth will wear or be damaged after a long period of use. Due to the welded connection method, the replacement of the rotary drilling teeth will be hindered and the operation will be inconvenient. Therefore, we propose a high-efficiency and stable rotary drilling bit for hard rock. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a high-efficiency and stable hard rock rotary drilling bit, which can solve the problems existing in the background art.

[0005] The technical solution of this utility model is:

[0006] A high-efficiency and stable rotary drilling bit for hard rock, comprising:

[0007] The connecting mounting cylinder has a connecting top frame welded to its top and a connecting bottom cylinder welded to its bottom. Threaded mounting holes are equally spaced on its outer side. Mounting slots are equally spaced at both the upper and lower ends of the connecting bottom cylinder, and several through holes are opened inside it.

[0008] A modular drill bit, which is detachably located inside the connecting base cylinder;

[0009] A fastening nut, which is threaded onto the outer surface of the internal component of the modular drill bit;

[0010] The movable protective mechanism is movably sleeved on the outer surface of the connecting mounting cylinder;

[0011] A movable limiting mechanism is detachably located on the outer surface of the connecting mounting cylinder;

[0012] The fastening bolt is movably positioned between the movable limiting mechanism and the connecting mounting cylinder;

[0013] A fixing and reinforcing rod is fixedly installed inside the mounting slot at the lower end of the connecting base tube.

[0014] In a further technical solution, the modular drill bit includes a threaded rod located inside the through hole of the connecting base cylinder. The bottom end of the threaded rod is fixedly connected to a connecting mounting block. The bottom end of the connecting mounting block is movably connected to the drill bit body via a connecting shaft. The fastening nut is sleeved on the outer surface of the threaded rod.

[0015] In a further technical solution, a fixing hole is provided at the top of the connecting mounting base, and the inner side of the fixing hole slides and fits against the outer surface of the fixing and reinforcing rod.

[0016] In a further technical solution, the active protective mechanism includes a connecting mounting ring, and the bottom end of the connecting mounting ring is provided with connecting protective sleeve blocks at equal intervals. The connecting protective sleeve blocks are provided with fixed receiving holes symmetrically inside.

[0017] In a further technical solution, the connecting protective sleeve is located inside the top mounting slot of the connecting bottom cylinder, and is fitted onto the top of the threaded rod and the outside of the fastening nut through the fixing receiving hole.

[0018] In a further technical solution, the movable limiting mechanism includes a connecting mounting collar, the top end of which is provided with connecting end blocks at equal intervals, and the bottom end of the connecting mounting collar and the top end of the connecting mounting collar are fitted together.

[0019] In a further technical solution, the end of the fastening bolt and the connecting end block slide against each other, and the fastening bolt is connected to the threaded mounting hole on the outer side of the connecting mounting cylinder through threads.

[0020] The beneficial effects of this utility model are:

[0021] 1. Through the connection and cooperation between the connecting bottom cylinder, modular drill bit and fastening nut, when the bottom end of the modular drill bit wears during subsequent use, the fastening nut can be quickly rotated and disassembled, so that the modular drill bit can be quickly disassembled and replaced. The structure is simple and the operation is convenient and quick.

[0022] 2. Through the cooperation of the movable protective mechanism, movable limiting mechanism and fastening bolt, the top of the modular drill bit and the fastening nut can be protected during actual use, so as to prevent the top of the modular drill bit from being squeezed and deformed during actual use, and to prevent the fastening nut from being difficult to rotate and disassemble, making operation convenient. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency and stable hard rock rotary drilling bit according to an embodiment of the present invention;

[0024] Figure 2This is an exploded structural diagram of a high-efficiency and stable hard rock rotary drilling bit according to an embodiment of the present invention;

[0025] Figure 3 This is an exploded bottom view of an embodiment of the present invention of a high-efficiency and stable hard rock rotary drilling bit;

[0026] Figure 4 This is a schematic diagram of a modular drill bit structure for a high-efficiency and stable hard rock rotary drilling bit according to an embodiment of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Connect the mounting cylinder;

[0029] 2. Connect the top frame;

[0030] 3. Connect the bottom cylinder;

[0031] 4. Modular drill bit; 41. Connecting mounting block; 42. Threaded rod; 43. Drill bit body; 44. Fixing socket;

[0032] 5. Tighten the nuts;

[0033] 6. Active protective mechanism; 61. Connecting mounting ring; 62. Connecting protective sleeve; 63. Fixing receiving hole;

[0034] 7. Motion limit mechanism; 71. Connecting mounting collar; 72. Connecting end block;

[0035] 8. Tighten the bolts;

[0036] 9. Fix the reinforcing rod. Detailed Implementation

[0037] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0038] Example:

[0039] like Figures 1-4 As shown, a high-efficiency and stable hard rock rotary drilling bit includes:

[0040] The connecting mounting cylinder 1 has a connecting top frame 2 welded to its top and a connecting bottom cylinder 3 welded to its bottom. Threaded mounting holes are equidistantly opened on its outer side. Mounting slots are equidistantly opened at both the upper and lower ends of the connecting bottom cylinder 3, and several through holes are opened inside it.

[0041] Modular drill bit 4, which is detachably located inside the connecting base cylinder 3;

[0042] The fastening nut 5 is threaded onto the outer surface of the internal component of the modular drill bit 4;

[0043] The movable protective mechanism 6 is movably sleeved on the outer surface of the connecting mounting cylinder 1;

[0044] The movable limiting mechanism 7 is detachably located on the outer surface of the connecting mounting cylinder 1;

[0045] Fastening bolt 8 is movably positioned between the movable limiting mechanism 7 and the connecting mounting cylinder 1;

[0046] The fixing and reinforcing rod 9 is fixedly installed inside the mounting slot at the lower end of the connecting base tube 3.

[0047] The working principle of the above technical solution is as follows:

[0048] During use, when it is necessary to disassemble and replace the modular drill bit 4, first remove the fastening bolt 8, move the movable limit mechanism 7 upward, and no longer restrict the movable protective mechanism 6. Then move the movable protective mechanism 6 upward to expose the top of the modular drill bit 4 and the fastening nut 5. Then rotate and disassemble the fastening nut 5 to remove the connection restriction of the modular drill bit 4. This allows for quick disassembly and replacement of the modular drill bit 4, making the operation convenient.

[0049] In another embodiment, such as Figure 4 As shown, the modular drill bit 4 includes a threaded rod 42 located inside the through hole of the connecting base cylinder 3. The bottom end of the threaded rod 42 is fixedly connected to a connecting mounting block 41. The bottom end of the connecting mounting block 41 is movably connected to the drill bit body 43 through a connecting shaft. The fastening nut 5 is sleeved on the outer surface of the threaded rod 42.

[0050] This facilitates the insertion of the threaded rod 42 into the through hole inside the connecting base cylinder 3, allowing the connecting mounting block 41 to snap into the mounting slot at the lower end of the connecting base cylinder 3 for initial installation. Then, the fastening nut 5 is connected to the threaded rod 42 in the mounting slot at the upper end of the connecting base cylinder 3, making the operation convenient and quick.

[0051] In another embodiment, such as Figure 4 As shown, a fixing hole 44 is provided at the top of the connecting mounting base block 41, and the inner side of the fixing hole 44 slides and fits against the outer side of the surface of the fixing reinforcing rod 9.

[0052] When the connecting mounting block 41 is inserted into the mounting slot at the lower end of the connecting base cylinder 3, the connecting mounting block 41 can be fitted onto the outer surface of the fixing reinforcing rod 9 under the action of the fixing insertion hole 44, thereby performing connection and reinforcement.

[0053] In another embodiment, such as Figure 3As shown, the active protective mechanism 6 includes a connecting mounting ring 61, and a connecting protective sleeve block 62 is provided at equal intervals at the bottom end of the connecting mounting ring 61. The connecting protective sleeve block 62 is provided with fixed receiving holes 63 symmetrically inside.

[0054] The protective sleeve 62 can be easily inserted into the mounting slot at the upper end of the connecting base cylinder 3. Under the action of the fixed receiving hole 63, it can be fitted onto the top of the threaded rod 42 and the outside of the fastening nut 5. Under the action of the movable limiting mechanism 7, it can restrict and fix the connecting mounting ring 61 and the connecting protective sleeve 62, providing stable protection for the top of the threaded rod 42 and the fastening nut 5, and is easy to operate.

[0055] In another embodiment, such as Figure 3 As shown, the connecting protective sleeve 62 is located inside the top mounting slot of the connecting bottom cylinder 3, and is fitted onto the top of the threaded rod 42 and the outside of the fastening nut 5 through the fixing receiving hole 63.

[0056] The protective sleeve 62 can be stably fitted onto the top of the threaded rod 42 and the outside of the fastening nut 5 under the action of the fixed receiving hole 63, and the protective sleeve 62 can be stably positioned inside the mounting slot at the upper end of the connecting base cylinder 3, making operation convenient.

[0057] In another embodiment, such as Figure 3 As shown, the movable limiting mechanism 7 includes a connecting mounting collar 71, with connecting end blocks 72 equidistantly provided at the top of the connecting mounting collar 71, and the bottom end of the connecting mounting collar 71 and the top of the connecting mounting ring 61 fitting together.

[0058] This facilitates the fitting of the connecting mounting collar 71 onto the outer surface of the connecting mounting cylinder 1, and the connection and fixing of the connecting end block 72 and the connecting mounting cylinder 1 with the fastening bolts 8, thereby fixing the connecting mounting collar 71. This allows the connecting mounting collar 71 to restrict and fix the position of the connecting mounting ring 61 and the connecting protective sleeve block 62, making the operation convenient.

[0059] In another embodiment, such as Figure 1 and Figure 3 As shown, the end of the fastening bolt 8 and the connecting end block 72 slide against each other, and the fastening bolt 8 is connected to the threaded mounting hole on the outer side of the connecting mounting cylinder 1 by threads.

[0060] The fastening bolt 8 can be inserted into the inside of the connecting end block 72 and rotated into the inside of the connecting mounting cylinder 1 for connection and fixation, making the operation convenient.

[0061] The working principle of this utility model is as follows: During use, when the drill bit body 43 wears down after prolonged use and needs to be replaced, firstly, the fastening bolt 8 is removed, and the connection between the connecting end block 72 and the connecting mounting cylinder 1 is no longer fixed. Then, the connecting mounting collar 71 and the connecting end block 72 are moved upward, and the connection mounting ring 61 and the connecting protective sleeve 62 are no longer restricted. Then, the connection mounting ring 61 and the connecting protective sleeve 62 are moved upward, so that the connecting protective sleeve 62 can disengage from the inner side of the upper mounting slot of the connecting base cylinder 3 and from the top of the threaded rod 42 and the outer side of the fastening nut 5. Then, the fastening nut 5 is rotated and disassembled, and the connection between the connecting base cylinder 3 and the threaded rod 42 is no longer restricted. The connecting mounting base block 41, the drill bit body 43, and the threaded rod 42 are pulled downward, so that the connecting mounting base block 41 disengages from the inner side of the bottom mounting slot of the connecting base cylinder 3, and the threaded rod 42 disengages from the inside of the connecting base cylinder 3. This allows for quick disassembly and replacement. The overall structure is simple and the operation is convenient and quick.

[0062] The above embodiments merely illustrate specific implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A high-efficiency and stable rotary drilling bit for hard rock, characterized in that, include: The connecting mounting cylinder (1) has a connecting top frame (2) welded to its top and a connecting bottom cylinder (3) welded to its bottom. Threaded mounting holes are provided at equal intervals on its outer side. Mounting slots are provided at equal intervals at both the upper and lower ends of the connecting bottom cylinder (3), and several through holes are provided inside it. Modular drill bit (4), which is detachably disposed inside the connecting bottom cylinder (3); A fastening nut (5) is threaded onto the outer surface of the internal component of the modular drill bit (4); The movable protective mechanism (6) is movably sleeved on the outer side of the surface of the connecting mounting cylinder (1); The movable limiting mechanism (7) is detachably disposed on the outer surface of the connecting mounting cylinder (1); Fastening bolt (8) is movably disposed between the movable limiting mechanism (7) and the connecting mounting cylinder (1); A fixed reinforcing rod (9) is fixedly installed inside the mounting slot at the lower end of the connecting bottom cylinder (3).

2. The high-efficiency and stable hard rock rotary drilling bit according to claim 1, characterized in that: The modular drill bit (4) includes a threaded rod (42) located inside the through hole of the connecting base cylinder (3). The bottom end of the threaded rod (42) is fixedly connected to a connecting mounting block (41). The bottom end of the connecting mounting block (41) is movably connected to the drill bit body (43) through a connecting shaft. The fastening nut (5) is sleeved on the outer surface of the threaded rod (42).

3. The high-efficiency and stable hard rock rotary drilling bit according to claim 2, characterized in that: The top of the connecting mounting base (41) is provided with a fixing hole (44), and the inner side of the fixing hole (44) slides and fits against the outer surface of the fixing reinforcing rod (9).

4. The high-efficiency and stable hard rock rotary drilling bit according to claim 1, characterized in that: The active protective mechanism (6) includes a connecting mounting ring (61), and the bottom end of the connecting mounting ring (61) is provided with connecting protective sleeves (62) at equal intervals. The connecting protective sleeves (62) are provided with fixed receiving holes (63) symmetrically inside.

5. The high-efficiency and stable hard rock rotary drilling bit according to claim 4, characterized in that: The connecting protective sleeve (62) is located inside the top mounting slot of the connecting bottom cylinder (3), and is fitted onto the top of the threaded rod (42) and the outside of the fastening nut (5) through the fixing receiving hole (63).

6. The high-efficiency and stable hard rock rotary drilling bit according to claim 1, characterized in that: The movable limiting mechanism (7) includes a connecting mounting collar (71), with connecting end blocks (72) equidistantly provided at the top of the connecting mounting collar (71), and the bottom end of the connecting mounting collar (71) and the top end of the connecting mounting ring (61) fitting together.

7. The high-efficiency and stable hard rock rotary drilling bit according to claim 6, characterized in that: The end of the fastening bolt (8) slides and fits against the connecting end block (72), and the fastening bolt (8) is connected to the threaded mounting hole on the outer side of the connecting mounting cylinder (1) by threads.

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