Rotary drilling rig drill bit convenient to replace

Abstract

The utility model discloses a rotary drilling rig drill bit convenient to replace, and relates to the technical field of rotary drilling rig drill bits. The rotary drilling rig drill bit convenient to replace comprises a rotary drilling rig rotating shaft and a drill bit body, a mounting column is fixedly connected to the upper surface of the drill bit body, the outer surface of the mounting column is rotationally sleeved with a rotating ring, the upper surface of the rotating ring is flush with the upper surface of the mounting column, and four fixing grooves formed in a circumferential array are formed in the upper surface of the rotating ring; the lower surface of the rotary drilling rig rotating shaft is fixedly connected with four fixing rods, the upper surface of the rotating ring is provided with four arc-shaped contact chutes, the four contact chutes are also arranged in a circumferential array, and the bottoms of the inclined surfaces of the four contact chutes are communicated with the fixing grooves. And in the downward moving process of the fixing rod, the position between the fixing rod and the fixing groove can be automatically corrected, the convenience of installing the drill bit on the rotating shaft of the rotary drilling rig is improved, and the operation difficulty during installation of the drill bit is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary drilling rig drill bits, in particular to a rotary drilling rig drill bit which is easy to replace. Background Art

[0002] Rotary drilling is a construction technology suitable for drilling holes in building foundation projects. It is widely used in municipal construction, highway bridges, high-rise buildings and other foundation construction projects. It is matched with different drilling tools and is suitable for dry (short spiral), wet (rotary bucket) and rock formation (core drill) drilling operations.

[0003] For example, the related technical patent CN216197903U is retrieved, which discloses a rotary drilling rig drill bit that is easy to replace quickly. The prior art provides a connecting hole and a connecting screw, and the connecting screw can be removed conveniently and quickly by rotating it.

[0004] However, the inventors have discovered that the prior art has the following problems during actual use: Since the existing rotary drilling rig drill bit is heavy, when installing the rotary drilling rig drill bit, the rotary drilling rig drill bit is generally placed vertically on the ground, and then the rotary drilling rig shaft is moved down to dock with the drill bit. In the prior art, the drill bit is installed by inserting a connecting screw into a connecting hole. However, during the installation process, it is necessary to ensure that the connecting screw and the connecting hole are in the same vertical position so that the connecting screw can be inserted into the connecting hole. However, in actual use, the drill bit is placed vertically on the ground, and it is impossible to always ensure that the connecting screw and the connecting hole are in the same vertical position. Therefore, it is necessary to continuously adjust the position between the connecting screw and the connecting hole, which increases the operating steps when installing the drill bit and reduces the convenience when replacing the drill bit. In response to the above problems, the inventors have designed a new rotary drilling rig drill bit that is easy to replace. Utility Model Content

[0005] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a rotary drilling rig drill bit that is easy to replace, which can solve the problem of needing to constantly adjust the position between the connecting screw and the connecting hole, thereby increasing the operating steps when installing the drill bit and reducing the convenience when replacing the drill bit.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotary drilling rig drill bit that is easy to replace, comprising a rotary drilling rig shaft and a drill bit, the upper surface of the drill bit is fixedly connected to a mounting column, a rotating ring is rotatably sleeved on the outer surface of the mounting column, the upper surface of the rotating ring is flush with the upper surface of the mounting column, the upper surface of the rotating ring is provided with four fixing grooves arranged in a circular array, the lower surface of the rotary drilling rig shaft is fixedly connected to four fixing rods, the fixing rods and the fixing grooves are in the same vertical position and are adapted to the fixing grooves, a locking structure is provided in the fixing grooves, the lower end of the fixing rod is hemispherical, the upper surface of the rotating ring is provided with four arc-shaped contact bevel grooves, the four contact bevel grooves are also arranged in a circular array, and the bottom of the inclined surface thereof is connected to the fixing groove.

[0007] Preferably, a docking column is fixedly connected to the lower surface of the rotary drilling rig shaft, the docking column is in the shape of a square column, and a docking groove is provided on the upper surface of the mounting column, and the docking column is matched with the docking groove.

[0008] Preferably, the locking structure comprises a locking rod, the locking rod is arranged in a fixing groove, a locking groove is formed on an outer surface of the fixing rod facing the locking rod, and the locking groove is adapted to the locking rod.

[0009] Preferably, the other end of the locking rod slides through the outer surface of the rotating ring, and a movable cavity is opened in the rotating ring and is sleeved on the locking rod. A movable plate is fixedly sleeved on the outer surface of the locking rod located in the movable cavity. The movable plate slides in the movable cavity. A return spring is fixedly connected between the side surface of the movable plate facing the fixed rod and the inner wall of the movable cavity. The return spring is movably sleeved on the outer surface of the locking rod.

[0010] Preferably, a control ring is threadedly sleeved on the outer surface of the rotating ring, an annular bevel groove is opened on the inner surface of the control ring, and one end of the locking rod located outside the rotating ring contacts the inclined surface of the annular bevel groove and slides.

[0011] Preferably, a push rod is provided on the outer side of the control ring, and a socket is provided on the outer surface of the control ring, and one end of the push rod is adapted to the socket.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The drill bit of the rotary drilling rig which is easy to replace does not require workers to align the fixing groove and the fixing rod in advance. The position between the fixing rod and the fixing groove can be automatically corrected during the downward movement of the fixing rod, thereby improving the convenience of installing the drill bit on the rotating shaft of the rotary drilling rig and reducing the difficulty of operation during the installation of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1This is a structural schematic diagram of a rotary drilling rig drill bit that is easy to replace according to the utility model;

[0016] Figure 2 This is a schematic diagram of the drill bit removal of the utility model;

[0017] Figure 3 This is a side plan view of the locking structure of the utility model;

[0018] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0019] Figure numerals: 1. rotary drilling rig shaft; 2. drill bit; 3. mounting column; 4. docking column; 5. docking groove; 6. rotating ring; 7. fixing groove; 8. fixing rod; 9. contact bevel groove; 10. locking groove; 11. movable cavity; 12. locking rod; 13. movable plate; 14. reset spring; 15. control ring; 16. annular bevel groove; 17. socket; 18. push rod. DETAILED DESCRIPTION

[0020] See also Figure 1-4 The utility model provides a technical solution: a drill bit of a rotary drilling rig that is easy to replace, comprising a rotary drilling rig shaft 1 and a drill bit 2, the drill bit 2 is arranged at the bottom of the rotary drilling rig shaft 1, a mounting column 3 is fixedly connected to the upper surface of the drill bit 2, a docking column 4 is fixedly connected to the lower surface of the rotary drilling rig shaft 1, the docking column 4 is in the shape of a square column, a docking groove 5 is opened on the upper surface of the mounting column 3, the docking column 4 is consistent with the docking groove 5, when the drill bit 2 is installed on the rotary drilling rig shaft 1, the docking column 4 completely extends into the docking groove 5, so when the rotary drilling rig shaft 1 rotates, the drill bit 2 can be synchronously driven to rotate through the docking column 4.

[0021] A rotating ring 6 is rotatably sleeved on the outer surface of the mounting column 3, and the upper surface of the rotating ring 6 is flush with the upper surface of the mounting column 3. Four fixing grooves 7 arranged in a circular array are opened on the upper surface of the rotating ring 6. Four fixing rods 8 are fixedly connected to the lower surface of the rotary drilling rig shaft 1. The fixing rods 8 are in the same vertical position as the fixing grooves 7 and are adapted to the fixing grooves 7. A locking structure is provided in the fixing groove 7. Therefore, when the rotary drilling rig shaft 1 is docked with the drill bit 2, the fixing rod 8 moves into the fixing groove 7. At the same time, the locking structure can completely fix the fixing rod 8 in the fixing groove 7, thereby avoiding separation between the drill bit 2 and the rotary drilling rig shaft 1.

[0022] The lower end of the fixing rod 8 is hemispherical, and the upper surface of the rotating ring 6 is provided with four arc-shaped contact inclined grooves 9, and the four contact inclined grooves 9 are also arranged in a circular array, and the bottom of the inclined surface is connected to the fixing groove 7. When the drill bit 2 is docked with the rotary drilling rig shaft 1, the fixing rod 8 is not in the same vertical position as the fixing groove 7, and the fixing rod 8 will first contact with the inclined surface of the contact inclined groove 9 during the falling process. When the fixing rod 8 continues to move downward, the lower end of the fixing rod 8 will form a thrust on the inclined surface of the contact inclined groove 9, thereby driving the rotating ring 6 to rotate on the outer surface of the mounting column 3, and the fixing rod 8 slides downward on the inclined surface of the contact inclined groove 9 and finally slides into the fixing groove 7. In this way, there is no need for the staff to align the fixing groove 7 and the fixing rod 8 in advance. The position between the fixing rod 8 and the fixing groove 7 can be automatically corrected during the downward movement of the fixing rod 8, thereby improving the convenience of installing the drill bit 2 on the rotary drilling rig shaft 1 and reducing the difficulty of operation when installing the drill bit 2.

[0023] The locking structure includes a locking rod 12, which is arranged in the fixing groove 7. A locking groove 10 is provided on the outer surface of the fixing rod 8 facing the locking rod 12. The locking groove 10 is adapted to the locking rod 12. Therefore, when the locking rod 12 moves into the locking groove 10, the locking rod 12 can form a restrictive effect on the fixing rod 8, thereby preventing the fixing rod 8 from separating from the fixing groove 7.

[0024] The other end of the locking rod 12 slides through the outer surface of the rotating ring 6, and a movable cavity 11 is opened in the rotating ring 6 and is sleeved on the locking rod 12. A movable plate 13 is fixedly sleeved on the outer surface of the locking rod 12 located in the movable cavity 11. The movable plate 13 slides in the movable cavity 11, and a return spring 14 is fixedly connected between the side surface of the movable plate 13 facing the fixed rod 8 and the inner wall of the movable cavity 11. The return spring 14 is movably sleeved on the outer surface of the locking rod 12. When the return spring 14 is not squeezed, the return spring 14 will form a thrust on the movable plate 13, so that the movable plate 13 is on the side away from the fixed rod 8. Therefore, the locking rod 12 moves out of the locking groove 10 and will not cause any obstruction to the fixed rod 8 sliding into the fixed groove 7.

[0025] The outer surface of the rotating ring 6 is threadedly sleeved with a control ring 15, and the inner surface of the control ring 15 is provided with an annular bevel groove 16. The end of the locking rod 12 located outside the rotating ring 6 contacts the inclined surface of the annular bevel groove 16 and slides. When the fixing rod 8 needs to be fixed, the rotating ring 15 is moved downward under the transmission of the thread by rotating the control ring 15, so that the inclined surface of the annular bevel groove 16 squeezes the locking rod 12, so that the locking rod 12 slides into the locking groove 10, and the return spring 14 is activated. The plate 13 is squeezed and contracted. When the drill bit 2 needs to be removed, the control ring 15 is rotated in the opposite direction. The control ring 15 is moved upward under the transmission of the thread, so that the inclined surface of the annular inclined groove 16 no longer squeezes the locking rod 12. At this time, the locking rod 12 is moved out of the locking groove 10 under the push of the return spring 14, so that the drill bit 2 can be separated from the rotary shaft 1 of the rotary drilling rig. In this way, the drill bit 2 and the rotary shaft 1 of the rotary drilling rig can be quickly removed or installed, thereby improving the efficiency of replacing the drill bit 2.

[0026] A push rod 18 is provided on the outside of the control ring 15, and a socket 17 is provided on the outer surface of the control ring 15. One end of the push rod 18 is adapted to the socket 17. When the control ring 15 needs to be rotated, only one end of the push rod 18 needs to be inserted into the socket 17. At this time, the staff only needs to push the push rod 18 to drive the control ring 15 to rotate, which reduces the difficulty of operation when the staff pushes the control ring 15 to rotate.

[0027] Working principle: When the drill bit 2 is docked with the rotary drilling rig shaft 1, and the fixing rod 8 is not in the same vertical position as the fixing groove 7, the fixing rod 8 will first contact the inclined surface of the contact bevel groove 9 during the falling process. When the fixing rod 8 continues to move downward, the lower end of the fixing rod 8 will form a thrust on the inclined surface of the contact bevel groove 9, thereby driving the rotating ring 6 to rotate on the outer surface of the mounting column 3, and the fixing rod 8 slides downward on the inclined surface of the contact bevel groove 9, and finally slides into the fixing groove 7.

Claims

1. A rotary drilling rig drill bit that is easy to replace, comprising a rotary drilling rig shaft (1) and a drill bit (2), characterized in that: The upper surface of the drill bit (2) is fixedly connected to a mounting column (3), and a rotating ring (6) is rotatably sleeved on the outer surface of the mounting column (3). The upper surface of the rotating ring (6) is flush with the upper surface of the mounting column (3), and the upper surface of the rotating ring (6) is provided with four fixing grooves (7) arranged in a circumferential array. The lower surface of the rotary drilling rig shaft (1) is fixedly connected to four fixing rods (8), and the fixing rods (8) and the fixing grooves (7) are in the same vertical position and are adapted to the fixing grooves (7). A locking structure is provided in the fixing groove (7), and the lower end of the fixing rod (8) is hemispherical. The upper surface of the rotating ring (6) is provided with four arc-shaped contact inclined grooves (9), and the four contact inclined grooves (9) are also arranged in a circumferential array, and the bottom of the inclined surface is connected to the fixing groove (7).

2. The easily replaceable rotary drilling rig drill bit according to claim 1, characterized in that: A docking column (4) is fixedly connected to the lower surface of the rotary drilling rig shaft (1), and the docking column (4) is in the shape of a square column. A docking groove (5) is provided on the upper surface of the mounting column (3), and the docking column (4) is matched with the docking groove (5).

3. The easily replaceable rotary drilling rig drill bit according to claim 1, characterized in that: The locking structure comprises a locking rod (12), the locking rod (12) is arranged in the fixing groove (7), and a locking groove (10) is formed on the outer surface of the fixing rod (8) facing the locking rod (12), and the locking groove (10) is adapted to the locking rod (12).

4. The easily replaceable rotary drilling rig drill bit according to claim 3, characterized in that: The other end of the locking rod (12) slides through the outer surface of the rotating ring (6), and a movable cavity (11) is provided in the rotating ring (6) and is sleeved on the locking rod (12). A movable plate (13) is fixedly sleeved on the outer surface of the locking rod (12) located in the movable cavity (11), and the movable plate (13) slides in the movable cavity (11).

5. The easily replaceable rotary drilling rig drill bit according to claim 4, characterized in that: A return spring (14) is fixedly connected between a side surface of the movable plate (13) facing the fixed rod (8) and the inner wall of the movable cavity (11), and the return spring (14) is movably sleeved on the outer surface of the locking rod (12).

6. The easily replaceable rotary drilling rig drill bit according to claim 5, characterized in that: The outer surface of the rotating ring (6) is threadedly sleeved with a control ring (15), and the inner surface of the control ring (15) is provided with an annular bevel groove (16). One end of the locking rod (12) located outside the rotating ring (6) contacts the inclined surface of the annular bevel groove (16) and slides.

7. The easily replaceable rotary drilling rig drill bit according to claim 6, characterized in that: A push rod (18) is arranged on the outer side of the control ring (15), and a plug hole (17) is provided on the outer surface of the control ring (15), and one end of the push rod (18) is adapted to the plug hole (17).

8. The easily replaceable rotary drilling rig drill bit according to claim 7, characterized in that: Both ends of the locking rod (12) are also configured to be hemispherical.

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