Modular drill head assembly for drum drill rig and mobile drum drill rig

Abstract

The application discloses a drum-type drilling machine modular drill bit assembly and a walking drum-type drilling machine, and the drill bit assembly realizes walking and direction angle adjustment through a walking mechanism and a swing arm structure; in addition, the drill bit assembly comprises a conical drill bit, a floating drill bit and an outer drum which are sequentially arranged from inside to outside and cooperatively perform drilling and crushing. The outer drum, the floating drill bit and the conical drill bit are sequentially arranged from outside to inside, the conical drill bit is directly driven to rotate through a shaft, the outer drum is driven through a planetary gear system, and the floating drill bit is driven to rotate through a shaft and has a rotating speed different from that of the outer drum, so that the floating drill bit can be lifted in a square hole and a cylindrical hole; when being limited by the square hole side wall, the floating drill bit can only move downward, the conical drill bit crushes and drills downward on a central region, the floating drill bit crushes and drills on an intermediate region, and the outer drum crushes and drills on a peripheral region; in addition, when a larger resistance is encountered, the outer drum is controlled to stop rotating through a motor gear, and the floating drill bit and the conical drill bit are used to crush and drill first, the outer drum and the two inner drill bits are used to drill together after crushing is completed, and the outer drum, the floating drill bit and the conical drill bit cooperatively adapt to soft and hard stratum structures.

Description

Technical Field

[0001] The invention relates to energy-saving mining machinery and equipment, in particular to a modular drill bit assembly of a drum drill and a walking drum drill. Background Art

[0002] Drum drills are widely used in drilling holes for infrastructure such as highways and high-speed railways, as well as in mines.

[0003] The patent application with application number CN202011344996.X discloses a rotary drilling tool and a rotary drilling rig, which includes a drill barrel, an upper sealing plate, an upper pressure plate and a soil unloading device, wherein the upper sealing plate is fixed to the top of the drill barrel, the soil unloading device includes a lower pressure plate and at least two push rods, the upper pressure plate and the lower pressure plate are respectively located on both sides of the upper sealing plate, and the soil unloading device can move up and down relative to the drill barrel, the lower pressure plate is located in the drill barrel, one end of the push rod is connected to the lower pressure plate, the push rod passes through the upper sealing plate and is connected to the upper pressure plate, and the upper pressure plate is fixedly connected to at least two push rods; wherein, the drill barrel includes an upper cylinder and a lower cylinder, the upper cylinder is connected to the upper sealing plate, the lower cylinder is connected to one end of the upper cylinder away from the upper sealing plate, and a cutting tooth is provided on the lower cylinder.

[0004] The above-mentioned drilling tool has only one drill barrel, which mainly drives the pick at the bottom of the drum to rotate and dig holes during operation. The pick has poor crushing ability and is more efficient in drilling holes in soft soil, but it will be difficult to move downward if it encounters rocks. Summary of the Invention

[0005] Based on the shortcomings of the prior art that the drill barrel has poor crushing ability and is difficult to crush rocks, the present invention provides a modular drill bit assembly for a drum drill and a walking drum drill.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] Drum drill modular drill head assembly, including:

[0008] The mounting cylinder has a mounting shaft hole inside and a mounting portion at the bottom;

[0009] The outer drum is rotatably mounted on the mounting portion, and has an inner wall provided with a first inner gear ring, and a lower inner hole including an upper square hole and a lower cylindrical hole;

[0010] The inner drum is rotatably mounted on the mounting portion and is located at an upper position inside the outer drum. The inner side wall of the inner drum is provided with a second inner gear ring, and the bottom of the inner drum is provided with an annular bottom plate. The mounting portion is provided with a locking motor gear meshing with the second inner gear ring.

[0011] The shaft is rotatably arranged in the mounting shaft hole, passes through the inner drum, passes through the bottom plate and extends into the outer drum, a sun gear is fixed to the side wall of the shaft, and a reverse external thread is provided on the side wall of the lower part of the shaft;

[0012] The planetary gears include a plurality of planetary gears which are rotatably mounted on the bottom plate and mesh with the sun gear and the first inner gear ring. After transmission by the planetary gears, the shaft and the outer drum rotate at different speeds.

[0013] A floating drill bit is threadedly connected to the external thread of the shaft, and a receiving cavity is provided at the bottom thereof. The outer wall thereof is a square structure that matches the square hole, and a gap is provided between the square structure and the square hole. The maximum width of the square structure is smaller than the diameter of the cylindrical hole.

[0014] The conical drill bit is arranged at the bottom end of the shaft and is located in the accommodating cavity. The top diameter of the conical drill bit is larger than the diameter of the shaft so as to limit the floating drill bit.

[0015] Preferably, the outer wall of the outer drum is provided with a ground drilling thread, the bottom of the outer drum is provided with first crushing teeth distributed in a circular array; the bottom of the floating drill bit is provided with second crushing teeth.

[0016] Preferably, the side wall of the shaft is provided with an annular limit platform, and a compression spring is sleeved on the shaft below the annular limit platform, and the bottom end of the compression spring abuts against the top of the floating drill bit.

[0017] Preferably, the tapered drill bit is a conical structure, and its side wall is provided with a drilling thread.

[0018] Preferably, the mounting portion includes two groups of annular mounting platforms arranged on the side walls of the mounting cylinder, the annular mounting platform group includes two annular mounting platforms arranged at intervals, the top horizontal parts of the outer drum and the inner drum are rotatably hung between the two annular mounting platforms, and the inner walls of the top horizontal parts of the outer drum and the inner drum are rotatably matched with the side walls of the mounting cylinder through bearings.

[0019] Preferably, a plurality of balls are embedded between the annular mounting platform and the horizontal portions of the outer drum and the top of the inner drum.

[0020] Preferably, the annular mounting platform includes a cylinder and an annular platform arranged on the side wall of the cylinder. The cylinder is sleeved on the mounting cylinder and is detachably connected to the mounting cylinder. The horizontal parts of the outer roller and the top of the inner roller are rotatably clamped between two adjacent annular platforms.

[0021] Preferably, an extension platform is provided at the bottom of the mounting portion, a motor for locking the motor gear is fixed on the extension platform, and a power line of the motor passes through the interior of the mounting cylinder.

[0022] The walking drum drilling rig includes a walking mechanism, a driving platform rotatably arranged on the walking mechanism, and a swing arm mechanism arranged on the driving platform. The output end of the swing arm mechanism is provided with a mounting frame, and the mounting frame is provided with a drive box with a drive motor. The above-mentioned modular drill bit assembly of the drum drilling rig is arranged on the drive box and its shaft extends into the drive box and is transmission-connected to the output end of the drive motor.

[0023] Preferably, the walking mechanism is a crawler-type walking mechanism, and the swing arm mechanism includes a swing arm unit that is multi-stage articulated and driven by multiple cylinders. A flip frame is hinged on the swing arm unit at the output end, and two swing frames hinged to each other through a hinge shaft are hinged between the flip frame and the swing arm unit at the output end, and a flip cylinder rotatably connected to the hinge shaft is hinged on the swing arm unit at the output end. The flip frame has two mounting plates that are opposite and spaced apart, and the drive box is detachably arranged between the two mounting plates.

[0024] Compared with the prior art, the advantages of the present invention are as follows: the present invention is provided with an outer drum, a floating drill bit and a conical drill bit in sequence from the outside to the inside, the conical drill bit is directly driven to rotate by the shaft, the outer drum is driven by the planetary gear system, and the floating drill bit is driven to rotate by the shaft and its rotation speed is different from that of the outer drum so that the floating drill bit can be raised and lowered in square holes and cylindrical holes. When in the square hole, it is limited by the side wall of the square hole and can only move downward. When drilling, the conical drill bit crushes and drills the central area, the floating drill bit floats to crush the middle area, and the outer drum crushes and drills the outer area. In addition, when encountering large resistance, the outer drum is stopped by the motor gear control, and the floating drill bit and the conical drill bit are first used for crushing and drilling. After the crushing is completed, the outer drum and the two internal drill bits are drilled together. The outer drum, the floating drill bit and the conical drill bit cooperate with each other and can adapt to soft and hard formation structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0026] Figure 1 is a perspective view of the drill bit assembly in Example 1;

[0027] Figure 2 is a perspective view of the drill bit assembly in Example 1;

[0028] Figure 3 This is an exploded view of the drill bit assembly in Example 1;

[0029] Figure 4 This is an exploded view of the drill bit assembly in Example 1;

[0030] Figure 5 is a cross-sectional view of the drill bit assembly in Example 1;

[0031] Figure 6 This is an exploded view of the inner drum in Example 1;

[0032] Figure 7 is a perspective view of Example 2;

[0033] Figure 8 A perspective view of the turning frame and the driving box in Example 2;

[0034] In the figure: 10, drill bit assembly; 100, drive box; 101, mounting cylinder; 1011, annular mounting platform; 1012, ball bearing; 1013, bearing; 1014, extension platform; 102, outer drum; 1021, drilling thread; 1022, first crushing tooth; 1023, square hole; 1024, cylindrical hole; 1025, first inner ring gear; 103, floating drill bit; 1031, second crushing tooth; 1032, square structure; 104, tapered drill bit; 1041, drilling thread; 105, shaft; 1051, sun gear; 1052, annular stop platform; 1053, compression spring; 1061, planetary gear; 1062, inner drum; 10621, second inner ring gear; 107, motor gear; 20, crawler walking mechanism; 30, driving platform; 40, swing arm mechanism; 501, cylinder for turning; 502, turning frame; 5021, mounting plate; 503, 504, swing frame; 505, hinge shaft. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention. Example

[0036] refer to Figures 1-6 , a modular drill head assembly 10 for a drum drill, comprising:

[0037] The mounting cylinder 101 has a mounting shaft hole inside and a mounting portion at the bottom;

[0038] The outer drum 102 is rotatably mounted on the mounting portion, and has a first inner gear ring 1025 on its inner side wall. The inner hole on the lower side includes a square hole 1023 on the upper side and a cylindrical hole 1024 on the lower side.

[0039] The inner drum 1062 is rotatably mounted on the mounting portion and is located on the upper side of the outer drum 102. A second inner gear ring 10621 is provided on its inner sidewall, and an annular bottom plate is provided on its bottom. A locking motor gear 107 is provided on the mounting portion and meshes with the second inner gear ring 10621.

[0040] The shaft 105 is rotatably mounted in the mounting shaft hole, passes through the inner drum 1062, passes through the bottom plate and extends into the outer drum 102. The sun gear 1051 is fixed to the side wall of the shaft 105, and the lower side wall of the shaft 105 is provided with a reverse external thread.

[0041] The planetary gears 1061, which include a plurality of planetary gears 1061 and are rotatably mounted on the bottom plate, are simultaneously meshed with the sun gear 1051 and the first inner ring gear 1025. After transmission, the number of teeth is set to ensure that the rotational speeds of the shaft 105 and the outer drum 102 are different. Preferably, the outer drum 102 is rotated at a different speed to ensure that the floating drill bit 103 and the outer drum 102 rotate at a different speed.

[0042] The floating drill bit 103 is threadedly connected to the external thread of the shaft 105. A receiving cavity is defined at its bottom, and its outer wall is a square structure 1032 that mates with the square hole 1023. A gap is provided between the square structure 1032 and the square hole 1023, so that the square structure 1032 is circumferentially limited when rotating within the square hole 1023. The maximum width of the square structure 1032 is less than the diameter of the cylindrical hole 1024, so that the square structure 1032 can rotate freely within the cylindrical hole 1024.

[0043] The conical drill bit 104 is disposed at the bottom end of the shaft 105 and is located in the accommodating cavity. The top diameter of the conical drill bit 104 is larger than the diameter of the shaft 105 to limit the floating drill bit 103. The side wall of the conical drill bit 104 is provided with a drilling thread 1041. In the initial state, the bottom end of the conical drill bit 104 is lower than the bottom end of the outer drum 102. When drilling, this solution applies pressure to the drill bit, and then drives the conical drill bit 104 to drill inward through the shaft 105. After drilling, the inner drum 1062 is locked by the motor gear 107, and the sun gear 1051 on the shaft 105 transmits power to the outer drum 102 through the planetary gear 1061. The outer drum 102 and the conical drill bit 104 work together to drill. The floating drill bit 103 and the outer drum 102 rotate at different speeds, so that the square hole 1023 of the outer drum 102 limits the square structure 1032 of the floating drill bit 103. The floating drill bit 103 rotates relative to the shaft 105 and rotates and descends under the action of the thread. When the floating drill bit 103 is lowered to the cylindrical hole 1024 and the square structure 1032 is located, it will be subject to greater resistance from the stratum and will rotate and rise. Since there is a gap between the square structure 1032 and the square hole 1023, the square structure 1032 can be easily screwed into the square hole 1023. When the square hole 1023 and the square structure 1032 are against each other, the floating drill bit 103 will drop again, and this process will be repeated. Even after encountering rock, the rock can be easily crushed by using the crushing drilling of the conical head and the floating rotation and crushing of the floating drill bit 103. Finally, the hole of the required diameter can be drilled in conjunction with the rotation of the outer drum 102.

[0044] Preferably, the outer wall of the outer drum 102 is provided with a ground-drilling thread 1021, and the bottom of the outer drum 102 is provided with a circular array of first crushing teeth 1022; the bottom of the floating drill bit 103 is provided with second crushing teeth 1031. The ground-drilling thread 1021 is used to improve the drilling capability of the outer drum 102, and the crushing teeth are used to improve its crushing capability.

[0045] Preferably, an annular stop 1052 is provided on the side wall of the shaft 105. A compression spring 1053 is sleeved on the shaft 105 below the annular stop 1052. The bottom end of the compression spring 1053 abuts against the top of the floating drill bit 103. The compression spring 1053 applies elastic force to the floating drill bit 103 to prevent the threaded connection structure from slipping.

[0046] Preferably, the tapered drill bit 104 is a conical structure, and its side wall is provided with a drilling thread 1041. The tapered drill bit 104 is provided with a thread on the side wall to facilitate drilling downwards when rotating.

[0047] Preferably, the mounting portion includes two sets of annular mounting platforms arranged on the side walls of the mounting cylinder 101. The annular mounting platform sets include two spaced annular mounting platforms 1011. The top horizontal portions of the outer drum 102 and the inner drum 1062 are rotatably suspended between the two annular mounting platforms 1011. The inner walls of the top horizontal portions of the outer drum 102 and the inner drum 1062 are rotatably engaged with the side walls of the mounting cylinder 101 via bearings 1013. In this embodiment, the suspension structure is used to limit the axial position of the outer drum 102 and the inner drum 1062, while rotatably engaging with the mounting cylinder 101 in the circumferential direction via the bearings 1013.

[0048] As preferred, a plurality of balls 1012 are embedded between the annular mounting platform 1011 and the horizontal portions of the outer drum 102 and the top of the inner drum 1062. The balls 1012 are used to reduce the friction between the annular mounting platform 1011 and the horizontal portions of the two drums and can be replaced when the balls 1012 are worn.

[0049] Preferably, the annular mounting platform 1011 comprises a cylindrical body and an annular platform disposed on the sidewall of the cylindrical body. The cylindrical body is sleeved on the mounting cylindrical body 101 and is detachably connected thereto. The horizontal portions of the tops of the outer drum 102 and the inner drum 1062 are rotatably clamped between two adjacent annular platforms. This structure provides a detachable solution for the annular mounting platform 1011, which can be fixed using a plurality of horizontal screws or locking pins. Furthermore, three annular mounting platforms 1011 can be provided to form two clamping grooves for respectively clamping the outer drum 102 and the inner drum 1062.

[0050] Preferably, an extension platform 1014 is provided at the bottom of the mounting portion, and the motor of the locking motor gear 107 is fixed on the extension platform 1014, and the power line of the motor is passed through the interior of the mounting cylinder 101. The motor has a locking function. When it is locked, the inner drum 1062 remains in place, and the planetary gear 1061 rotates in place, thereby driving the outer drum 102 to rotate. Example

[0051] refer to Figure 7-Figure 8 The walking drum drilling rig includes a walking mechanism, a driving platform 30 rotatably arranged on the walking mechanism, and a swing arm mechanism 40 arranged on the driving platform 30. The output end of the swing arm mechanism 40 is provided with a mounting frame, and the mounting frame is provided with a drive box 100 with a drive motor. The modular drill bit assembly of the drum drilling rig in Example 1 is arranged on the drive box 100 and its shaft 105 extends into the drive box 100 and is transmission-connected to the output end of the drive motor.

[0052] Preferably, the walking mechanism is a crawler-type walking mechanism 20, and the swing arm mechanism 40 includes a swing arm unit with multi-stage articulation and driven by multiple cylinders. A flip frame 502 is hinged on the swing arm unit at the output end, and two swing frames 503, 504 hinged to each other through a hinge shaft 505 are hinged between the flip frame 502 and the swing arm unit at the output end, and a flip cylinder 501 rotatably connected to the hinge shaft 505 is hinged on the swing arm unit at the output end. The flip frame 502 has two mounting plates 5021 that are opposite and spaced apart, and the drive box 100 is detachably arranged between the two mounting plates 5021.

[0053] The modular drill bit assembly and the walking drum drill provided by the present invention have been introduced above. The principles and implementation methods of the present invention have been illustrated using specific examples herein. The above examples are intended only to facilitate understanding of the present invention and its core concepts. It should be noted that those skilled in the art will be able to make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the claims of the present invention.

Claims

1. Modular drill bit assembly for drum drilling rig, characterized in that, include: The mounting cylinder has a mounting shaft hole inside and a mounting portion at the bottom; The outer drum is rotatably mounted on the mounting portion, and has an inner wall provided with a first inner gear ring, and a lower inner hole including an upper square hole and a lower cylindrical hole; The inner drum is rotatably mounted on the mounting portion and is located at an upper position inside the outer drum. The inner side wall of the inner drum is provided with a second inner gear ring, and the bottom of the inner drum is provided with an annular bottom plate. The mounting portion is provided with a locking motor gear meshing with the second inner gear ring. The shaft is rotatably arranged in the mounting shaft hole, passes through the inner drum, passes through the bottom plate and extends into the outer drum, a sun gear is fixed to the side wall of the shaft, and a reverse external thread is provided on the side wall of the lower part of the shaft; The planetary gears include a plurality of planetary gears which are rotatably mounted on the bottom plate and mesh with the sun gear and the first inner gear ring. After transmission by the planetary gears, the shaft and the outer drum rotate at different speeds. A floating drill bit is threadedly connected to the external thread of the shaft, and a receiving cavity is provided at the bottom thereof. The outer wall thereof is a square structure that matches the square hole, and a gap is provided between the square structure and the square hole. The maximum width of the square structure is smaller than the diameter of the cylindrical hole. The conical drill bit is arranged at the bottom end of the shaft and is located in the accommodating cavity. The top diameter of the conical drill bit is larger than the diameter of the shaft so as to limit the floating drill bit.

2. The modular drill bit assembly of a drum drill according to claim 1, wherein: The outer wall of the outer drum is provided with a thread for drilling the ground, the bottom of the outer drum is provided with first crushing teeth distributed in a circular array; the bottom of the floating drill bit is provided with second crushing teeth.

3. The modular drill bit assembly of a drum drill according to claim 1, wherein: An annular limiting platform is provided on the side wall of the shaft rod, and a compression spring is sleeved on the shaft rod below the annular limiting platform, and the bottom end of the compression spring abuts against the top of the floating drill bit.

4. The modular drill bit assembly of a drum drill according to claim 1, wherein: The conical drill bit has a conical structure and its side wall is provided with drilling threads.

5. The modular drill bit assembly of a drum drill according to claim 1, wherein: The mounting portion includes two groups of annular mounting platforms arranged on the side walls of the mounting cylinder. The annular mounting platform groups include two annular mounting platforms arranged at intervals. The horizontal parts of the top of the outer drum and the inner drum are rotatably hung between the two annular mounting platforms. The inner walls of the horizontal parts of the top of the outer drum and the inner drum are rotatably matched with the side walls of the mounting cylinder through bearings.

6. The modular drill bit assembly of a drum drill according to claim 5, wherein: A plurality of balls are embedded between the annular mounting platform and the horizontal parts of the outer drum and the top of the inner drum.

7. The modular drill bit assembly of a drum drill according to claim 5, wherein: The annular mounting platform includes a cylinder and an annular platform arranged on the side wall of the cylinder. The cylinder is sleeved on the mounting cylinder and is detachably connected to the mounting cylinder. The horizontal parts of the outer drum and the top of the inner drum are rotatably clamped between the two adjacent annular platforms.

8. The modular drill bit assembly of a drum drill according to claim 1, wherein: An extension platform is provided at the bottom of the mounting portion, and a motor for locking the motor gear is fixed on the extension platform, and a power line of the motor passes through the interior of the mounting cylinder.

9. Walking drum drilling rig, characterized in that, It includes a walking mechanism, a driving platform rotatably arranged on the walking mechanism, and a swing arm mechanism arranged on the driving platform. The output end of the swing arm mechanism is provided with a mounting frame, and the mounting frame is provided with a drive box with a drive motor. The modular drill bit assembly of the drum drilling rig described in any one of claims 1 to 8 is arranged on the drive box and its shaft extends into the drive box and is transmission-connected to the output end of the drive motor.

10. The walking drum drilling rig according to claim 9, characterized in that: The walking mechanism is a crawler-type walking mechanism, and the swing arm mechanism includes a swing arm unit with multi-stage articulation and driven by multiple cylinders. The swing arm unit at the output end is hinged with a flip frame, and two swing frames hinged to each other through a hinge shaft are hinged between the flip frame and the swing arm unit at the output end, and the swing arm unit at the output end is hinged with a flip cylinder rotatably connected to the hinge shaft. The flip frame has two mounting plates that are opposite and spaced apart, and the drive box is detachably arranged between the two mounting plates.

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