A lunar coring drill with active chip removal and cut-off closure

Abstract

The application discloses a moon coring drill with active chip removal and cutting closing functions and belongs to the technical field of drill tools. The moon coring drill comprises a hollow magnetic shaft, the top of the hollow magnetic shaft is provided with a power transmission assembly, the bottom of the hollow magnetic shaft is connected with a cutting closing assembly, the cutting closing assembly is connected with the power transmission assembly above, the bottom is fixedly connected with a drill bit, the center of the drill bit is a cavity structure and is connected with the hollow magnetic shaft and the inner cavity of the cutting closing assembly in communication, and the cutting closing assembly is provided with a chip removal assembly which is sleeved on the outer wall of the hollow magnetic shaft. The moon coring drill with active chip removal and cutting closing functions can remove chips in the process of drilling, reduce the friction generated by the chips in the process of drilling, make the drilling depth deeper, actively cut and close and recycle when the material needs to be taken, and realize the complete coring process.

Description

Technical Field

[0001] This invention relates to the field of drilling tools, and in particular to a lunar coring tool with active chip removal and cutting and closing functions. Background Technology

[0002] Lunar surface sampling has always been a technical issue of great importance to the country. Due to the limitations of the lunar environment, it is not possible to inject water into the drill pipe and use the water flow to remove the debris, as is the case with drilling on the Earth's surface. Existing lunar coring tools do not have a chip removal function, and the drilling depth is limited due to the friction of the debris during the drilling process.

[0003] In addition, the lunar surface has hard lunar rocks and soft lunar regolith. Because the existing lunar coring tools do not have a cutting function, encountering hard lunar regolith during the coring process will affect the coring results. Summary of the Invention

[0004] The purpose of this invention is to provide a lunar coring tool with active chip removal and cutting and closing functions. It can remove chips during the drilling process, reduce the friction of the chips generated during drilling, and thus make the drilling depth deeper. When encountering hard geological conditions, it can actively cut and close the chip to achieve a complete coring process.

[0005] To achieve the above objectives, the present invention provides a lunar coring drill with active chip removal and cutting / closing functions, comprising a hollow magnetic shaft, a power transmission assembly at the top of the hollow magnetic shaft, a cutting / closing assembly connected to the bottom of the hollow magnetic shaft, the upper part of the cutting / closing assembly connected to the power transmission assembly, and a drill bit fixedly connected to the bottom of the drill bit, the center of the drill bit having a hollow cavity structure and communicating with the inner cavity of the hollow magnetic shaft and the cutting / closing assembly, and a chip removal assembly sleeved on the outer wall of the hollow magnetic shaft above the cutting / closing assembly.

[0006] Preferably, the power transmission assembly includes a connecting post, the top of the connecting post is provided with a thread, and a number of sets of two locking posts arranged longitudinally with the top shorter than the bottom are provided on the side wall below the connecting post. The bottom of the connecting post is provided with a connecting ring fixed to the top of the hollow magnetic shaft. The inner wall of the connecting ring is provided with a transverse locking groove and a vertical L-shaped locking groove that are radially encircling and axially distributed, both matching the number of locking post sets and the spacing distance.

[0007] A rotating disk is provided above the connecting ring and fitted inside the connecting post. The inner wall of the rotating disk near the connecting post has a rotating disk slot that matches the number and spacing of the locking posts. The interior of the rotating disk is a hollow cavity structure with internal teeth. A connecting gear is engaged inside the rotating disk. The bottom of the connecting gear is connected to a drive shaft that is vertically distributed outside the hollow magnetic shaft. The top of the drive shaft is engaged with a fixing ring. The fixing ring is fitted and fixed to the outer wall of the connecting ring. The bottom of the drive shaft is engaged inside the cutting and closing assembly and is meshed with the cutting and closing assembly through a drive gear.

[0008] Preferably, the cutting and finishing assembly includes a cutting and finishing assembly housing fixed to the bottom side wall of the hollow magnetic shaft. An annular mounting plate sleeved on the transmission shaft is fixed inside the cutting and finishing assembly housing. A rack meshing with the drive gear is provided on the annular mounting plate. A limiting post fixed to the annular mounting plate is provided on the outer side of the rack. The outer end of the rack is in contact with the inner wall of the cutting and finishing assembly housing. A roller is connected to the inner end of the rack. A cutting blade rotatably connected to the annular mounting plate is provided on the inner side of the roller.

[0009] Preferably, the cutting and finishing assembly further includes an elastic rope threaded through the bottom of the drive shaft, with a cloth bag attached to the elastic rope.

[0010] Preferably, the chip removal assembly includes a coil mover movably sleeved on the side wall of the hollow magnetic shaft, and chip removal units slidably connected to the coil mover and closely arranged in the transverse direction of the coil mover; the drive shaft passes through the coil mover, and a conductive slip ring is tightly sleeved above the drive shaft.

[0011] Preferably, the outer wall of the coil mover is provided with a fixed guide rail and a fixed block that are connected to the chip removal unit.

[0012] Preferably, the chip removal unit includes a base plate, an inner side of which is provided with a positioning slider that is slidably connected to the fixed guide rail, a groove is provided in the middle of the base plate, and a connecting slider that is fixedly connected to the fixed block is slidably disposed in the groove; a top plate is connected to the top of the base plate, a first side plate is connected to the outer side of the top plate by a hinge, a second side plate is connected to both sides of the first side plate by hinges, a support spring is provided between the base plate and the first side plate, and a retraction assembly fixed to the first and second side plates is connected to the outer side of the connecting slider through the groove.

[0013] Preferably, the shrinking assembly includes connecting rings symmetrically arranged on the bottom outer sides of the second side plates on both sides. A first connecting rod and a second connecting rod are respectively provided on the two connecting rings, and a first fixing block is provided on the inner side of each of the first connecting rods. The two second connecting rods are connected to a third connecting rod on the inner side at their connection points. A second fixing block, with its top fixed to the first side plate, is fitted onto the third connecting rod. A fourth connecting rod is connected to the inner end of the third connecting rod. A third fixing block, with its top fixed to the first side plate, is fitted onto the inner side of the fourth connecting rod. A fifth connecting rod is connected to the inner end of the fifth connecting rod, which passes through the groove and connects to the connecting slider.

[0014] Preferably, the height of the base plate is greater than the height of the coil mover.

[0015] Therefore, the present invention employs a lunar coring tool with active chip removal and cutting and closing functions, which can remove chips during the drilling process, reduce the frictional force generated by the chips during drilling, and thus make the drilling depth deeper. When encountering harder geological conditions, it can actively cut and close the chip to achieve a complete coring process.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a lunar coring tool with active chip removal and cutting and closing functions according to the present invention;

[0018] Figure 2 This is a schematic diagram of the connecting column of an embodiment of a lunar coring tool with active chip removal and cutting and closing functions according to the present invention;

[0019] Figure 3 This is a schematic diagram of the installation structure of the connecting ring of a lunar coring drill tool embodiment with active chip removal and cutting and closing functions according to the present invention;

[0020] Figure 4 This is a schematic diagram of the installation structure of the rotating disk of a lunar coring tool embodiment with active chip removal and cutting and closing functions according to the present invention;

[0021] Figure 5 This is a schematic diagram of the installation structure of the drive shaft of a lunar coring drill with active chip removal and cutting and closing functions according to an embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the internal structure of the cutting and closing assembly of a lunar coring tool embodiment with active chip removal and cutting and closing functions according to the present invention;

[0023] Figure 7 This is a schematic diagram of the bottom structure of the cutting and closing assembly of a lunar coring tool embodiment with active chip removal and cutting and closing functions according to the present invention;

[0024] Figure 8 This is a schematic diagram of the installation position of the chip removal unit in an embodiment of a lunar coring drill with active chip removal and cutting and closing functions according to the present invention;

[0025] Figure 9 This is a schematic diagram of the inner structure of the chip removal unit of a lunar coring tool embodiment with active chip removal and cutting and closing functions according to the present invention;

[0026] Figure 10 This is a schematic diagram of the outer structure of the chip removal unit of a lunar coring tool embodiment of the present invention, which has active chip removal and cutting and closing functions.

[0027] Figure Labels

[0028] 1. Hollow magnetic shaft; 2. Drill bit; 3. Cutting and finishing assembly housing; 41. Annular mounting plate; 42. Rack; 43. Limiting post; 44. Roller; 45. Cutting blade; 46. Elastic rope; 47. Cloth bag; 51. Rotary disk; 52. Rotary disk slot; 53. Connecting gear; 54. Drive shaft; 55. Fixing ring; 56. Drive gear; 6. Coil mover; 61. Fixed guide rail; 62. Fixing block; 7. Chip removal unit; 71. Base plate; 72. Positioning slider;

[0029] 73. Slide rail; 74. Connecting slider; 75. Top plate; 76. Hinge; 77. First side plate;

[0030] 78. Second side plate; 79. Support spring; 710. Linking ring; 711. First connecting rod;

[0031] 712. First fixing block; 713. Second connecting rod; 714. Third connecting rod; 715. Second fixing block; 716. Fourth connecting rod; 717. Third fixing block; 718. Fifth connecting rod; 8. Connecting ring; 81. Horizontal groove; 82. Vertical L-shaped groove; 9. Connecting post; 91. Locking post; 10. Conductive slip ring. Detailed Implementation

[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] Example 1

[0035] like Figure 1 As shown, this invention provides a lunar coring drill with active chip removal and cutting / closing functions, including a hollow magnetic shaft 1. A power transmission assembly is located at the top of the hollow magnetic shaft 1, connecting to a drive motor to provide rotational driving force for the entire drill. A cutting / closing assembly is connected to the bottom of the hollow magnetic shaft 1, used for cutting and sealing hard lunar rock or regolith materials. The upper part of the cutting / closing assembly is connected to the power transmission assembly, and the bottom is fixedly connected to a drill bit 2 for direct contact with the ground for drilling. The drill bit 2 has a hollow cavity structure at its center, communicating with the inner cavities of the hollow magnetic shaft 1 and the cutting / closing assembly, allowing lunar rock or regolith to enter the hollow magnetic shaft for later collection. A chip removal assembly is located above the cutting / closing assembly, sleeved on the outer wall of the hollow magnetic shaft 1, used to remove as much lunar regolith or lunar rock debris as possible from the borehole during drilling, reducing the impact of this material on the borehole.

[0036] The power transmission assembly includes a connecting column 9, such as... Figure 2 As shown, the top of the connecting post 9 is threaded for easy connection with an external drive motor. Four sets of two vertically arranged posts 91, shorter at the top and longer at the bottom, are located on the side wall below the connecting post 9. These posts engage with the slot structure at the bottom to transmit power to different structures below. A connecting ring 8, fixed to the top of the hollow magnetic shaft 1, is located at the bottom of the connecting post 9. The inner wall of the connecting ring 8 has radially circumferential and axially distributed transverse slots 81 and vertical L-shaped slots 82, both matching the number and spacing of the posts 91. Figure 3As shown, the vertical spacing between the bottom of the horizontal slot 81 and the vertical L-shaped slot 82 is just enough to ensure that the two slots 91 distributed vertically can be located in the horizontal slot 81 and the vertical L-shaped slot 82 respectively, and the distance between the horizontal slot 81 and the top is also just equal to the vertical distance between the two slots 91.

[0037] When the lower locating post 91 is at the bottom of the vertical L-shaped locating groove 82, the connecting post 9 can be driven to rotate synchronously by the external motor. The connecting post 9 drives the locating post 91 to rotate synchronously. During the rotation, the lower locating post 91 is limited by the vertical L-shaped locating groove 82, and eventually the connecting locating ring 8 will rotate synchronously through the locating post 91, thereby causing the entire core drilling tool structure to rotate synchronously. Combined with the downward pressure of the drive motor, the drilling effect of the core drilling tool is achieved.

[0038] Above the connecting ring 8 is a rotating disk 51 fitted inside the connecting post 9. The inner wall of the rotating disk 51 near the connecting post 9 has a rotating disk groove 52 that matches the number and spacing of the connecting posts 91. Figure 3 and Figure 4 As shown, the vertical spacing between the horizontal slot 81 and the rotating disk slot 52 is just enough to ensure that the two vertically distributed locking posts 91 can be located in the horizontal slot 81 and the rotating disk slot 52 respectively.

[0039] like Figure 4 As shown, the interior of the rotating disk 51 is configured as a hollow cavity structure with internal teeth. A connecting gear 53 is engaged inside the rotating disk 51, and the bottom of the connecting gear 53 is connected to a transmission shaft 54 ​​vertically distributed on the outside of the hollow magnetic shaft 1. In this embodiment, four transmission shafts 54 are evenly arranged on the outside of the hollow magnetic shaft 1, as shown. Figure 5 As shown, this ensures a stable driving force for the cutting and finishing assembly. The top of the drive shaft 54 ​​is engaged with the retaining ring 55, which is sleeved and fixed on the outer wall of the connecting retaining ring 8. The bottom of the drive shaft 54 ​​is engaged with the cutting and finishing assembly and is connected to the cutting and finishing assembly through the drive gear 56.

[0040] When the upper locking post 91 is located within the rotating disk slot 52, the connecting post 9 can be rotated in the opposite direction by the reverse drive of the external motor. The connecting post 9 drives the locking post 91 to rotate synchronously. During the rotation, the upper locking post 91 is blocked and limited by the rotating disk slot 52, and eventually the locking post 91 drives the rotating disk 51 to rotate synchronously. The rotating disk 51 drives the connecting gear 53 to rotate through its internal teeth, thereby driving the transmission shaft 54 ​​to rotate synchronously with the connecting gear 53, and further driving the drive gear 56 at the bottom to rotate synchronously, thus providing a power source for the bottom cutting and finishing assembly. The working state of the cutting and finishing assembly can be adjusted by rotating the rotating disk 51 in the forward or reverse direction by the connecting post 9.

[0041] An annular mounting plate 41, sleeved on the drive shaft 54, is fixed inside the outer casing 3 of the trimming and finishing assembly. Figure 6 As shown, a rack 42 that meshes with a drive gear 56 is provided on the annular mounting plate 41. A limiting post 43 fixed to the annular mounting plate 41 is provided on the outer side of the rack 42 to limit the position of the rack 42, so that its position can only change along a specific trajectory. The outer end of the rack 42 is in contact with the inner wall of the cutting and finishing assembly housing 3. A roller 44 is connected to the inner end of the rack 42. A cutter 45 rotatably connected to the annular mounting plate 41 is provided on the inner side of the roller 44.

[0042] During use, the rotation of the drive gear 56 on the transmission shaft 54 ​​drives the rack 42 to move forward or backward, thereby driving the roller 44 at the end to move forward or backward. The roller 44 is in contact with the outer wall of the cutter 45. When the roller 44 moves forward, it drives the cutter 45 to rotate inward, causing the cutter head of the cutter 45 to move inward. This, combined with the rotation of the hollow magnetic shaft 1, drives the axial rotation of each cutter 45, achieving the cutting effect of lunar soil or lunar rock. After cutting, the cutter 45 will hold the lunar rock or lunar soil in the hollow magnetic shaft 1, dragging it in place. This, combined with the closing action below, ensures that the lunar soil in the hollow magnetic shaft 1 is minimized to fall out during extraction, thus improving material extraction efficiency.

[0043] In addition, such as Figure 7 As shown, the cutting and closing assembly also includes an elastic rope 46 threaded through the bottom of the drive shaft 54, with a cloth bag 47 connected to the elastic rope 46. The elastic rope 46 is threaded through the bottom of the two drive shafts 54 on opposite sides. When the drive shaft 54 ​​rotates, the elastic rope 46 will wrap around the corresponding drive shaft 54, causing the elastic rope 46 to tighten rapidly. This will cause the top of the cloth bag 47 to close, providing a certain degree of sealing for the lunar rock or lunar soil already inside the hollow magnetic shaft 1, preventing a large amount of soil from leaking out from the bottom, and further ensuring smooth material retrieval.

[0044] The chip removal assembly includes a coil mover 6 movably sleeved on the side wall of the hollow magnetic shaft 1, a drive shaft 54 ​​passing through the coil mover 6, and a conductive slip ring 10 tightly sleeved above the drive shaft 54, located above the fixed ring 55. Figure 1 As shown. In use, the external power supply equipment can be fixedly connected to the conductive slip ring 10 via a connecting rod. The conductive slip ring 10 energizes the coil mover 6 through the drive shaft 54. The conductive slip ring 10 can remain stationary while providing uninterrupted power during the rotation of the entire core drilling tool, ensuring the normal operation of the chip removal assembly. Since the structure of the conductive slip ring 10 is a conventional technology, it will not be described in detail here.

[0045] After being energized, the coil mover 6 can move up and down on the hollow magnetic shaft 1 under the control of an encoder. Chip removal units 7, arranged closely along the transverse direction of the coil mover 6, are slidably connected to the coil mover 6. Figure 8 As shown, the up-and-down movement of the coil mover 6 can drive each chip removal unit 7 to move up and down.

[0046] The outer wall of the coil mover 6 is provided with a fixed guide rail 61 and a fixed block 62 connected to the chip removal unit 7. In this embodiment, there are two fixed guide rails 61, one on the left and one on the right, which can ensure that the chip removal unit 7 can move stably up and down in the vertical direction. The fixed block 62 is located in the middle of the two fixed guide rails 61, which can provide driving force for the up and down swing of the chip removal unit 7.

[0047] like Figure 9 As shown, the chip removal unit 7 includes a base plate 71. A positioning slider 72 that is slidably connected to the fixed guide rail 61 is provided on the side of the base plate 71 near the coil mover 6. A groove 73 is provided in the middle of the base plate 71. A connecting slider 74 that is fixedly connected to the fixed block 62 is slidably arranged in the groove 73. The positioning slider 72 and the connecting slider 74 can ensure that the chip removal unit 7 can be stably fixed on the outer wall of the coil mover 6 and can move up and down smoothly.

[0048] like Figure 10 As shown, a top plate 75 is connected to the top of the base plate 71. A first side plate 77 is connected to the outer side of the top plate 75 via a hinge 76. Second side plates 78 are connected to both sides of the first side plate 77 via hinges 76, allowing the first side plate 77 to retract downwards around the edge of the top plate 75, and the second side plates 78 to retract inwards around the edge of the first side plate 77. A support spring 79 is provided between the base plate 71 and the first side plate 77, providing upward support to the first side plate 77. This ensures that the first side plate 77 remains stably open under the action of the support spring 79 when the chip removal unit 7 is not subjected to other external forces. A retraction assembly is connected to the side of the connecting slider 74 away from the coil mover 6, and is fixed to the first side plate 77 and the second side plate 78. The retraction assembly controls the retraction of the first side plate 77 and the second side plate 78.

[0049] The retraction assembly includes connecting rings 710 symmetrically arranged at the bottom of the outer side of the second side plates 78 on both sides. The two connecting rings 710 are respectively provided with a first connecting rod 711 and a second connecting rod 713 connected in a straight line. The inner side of the first connecting rod 711 is provided with a first fixing block 712 to limit the first connecting rod 711 and ensure that the first connecting rod 711 on both sides is always located on the connecting line of the connecting rings 710 on both sides. This ensures that the first connecting rod 711 can efficiently pull the second side plates 78 on both sides to retract inward.

[0050] The two second connecting rods 713 are connected to the inner third connecting rod 714 at the connection position. The third connecting rod 714 is fitted with a second fixing block 715 fixed on the top of the first side plate 77. The inner end of the third connecting rod 714 is connected to a fourth connecting rod 716. The inner side of the fourth connecting rod 716 is fitted with a third fixing block 717 fixed on the top of the first side plate 77. The inner end of the fourth connecting rod 716 is connected to a fifth connecting rod 718. The inner end of the fifth connecting rod 718 passes through the slide groove 73 and connects to the connecting slider 74.

[0051] Furthermore, the height of the base plate 71 is greater than the height of the coil mover 6, which allows the coil mover 6 to remain a certain distance from the lowest point of the hollow magnetic shaft 1 even when the bottom of the base plate 71 has reached its lowest point. The coil mover 6 can continue to move downwards, which in turn drives the connecting slider 74 to slide downwards, thereby ultimately achieving the retraction of the first side plate 77 and the second side plate 78. When the coil mover 6 moves upwards, the first side plate 77 and the second side plate 78 can be reset under the support of the support spring 79. The up-and-down cyclical movement of the coil mover 6 can smoothly drive the chip removal unit 7 to swing up and down synchronously, facilitating the discharge of some debris.

[0052] Working Principle: During use, the top of the connecting post 9 is connected to an external drive motor. When drilling is required, the external drive motor moves downward, causing the bottom locking post 91 of the connecting post 9 to be positioned at the bottom of the vertical L-shaped locking groove 82. The rotation of the external drive motor causes the connecting retaining ring 8 and the hollow magnetic shaft 1 to rotate, which in turn drives the bottom drill bit 2 to drill downward. During the downward drilling process of the drill bit 2, debris is generated. The encoder controls the coil mover 6 to move to the bottommost position close to the drill bit 2. As the coil mover 6 moves downward, it drives each chip removal unit 7 to move downward. Since the height of the bottom plate 71 of the chip removal unit 7 is greater than the height of the coil mover 6, the chip removal unit 7 stops moving when its bottom contacts the top of the cutting and closing assembly housing 3, and the coil mover 6 continues to move downward before contacting the cutting and closing assembly housing 3.

[0053] As the coil mover 6 moves downward, the fixed block 62 causes the connecting slider 74 to continue sliding downward. The downward movement of the connecting slider 74 causes the fifth link 718 to move downward, which in turn causes the fourth link 716 to move, which in turn causes the third link 714 to move, which in turn causes the second link 713 to move, and finally, the second link 713 causes the first link 711 to move. Under the action of the first link 711, the second side plates 78 on both sides flip inward.

[0054] After the outer end of the third link 714 moves to the position of the second fixing block 715, it will be fixed. The outer end of the fourth link 716 will bypass the third fixing block 717 and follow the fifth link 718 to flip downward. As the connecting slider 74 continues to move downward, it will drive the first side plate 77 to move closer to the bottom plate 71 and fit together. Similarly, as the connecting slider 74 moves upward, the first side plate 77 and the second side plates 78 on both sides will unfold.

[0055] When the drill bit 2 starts drilling, the control coil mover 6 moves downward, driving each chip removal unit 7 to move downward to the bottom and retract and close. The chips generated during drilling will accumulate above the drill bit 2. After drilling to a certain depth, the coil mover 6 moves upward through the encoder, driving each chip removal unit 7 to move upward. The chip removal unit 7 will unfold during the upward movement, thus discharging the waste chips.

[0056] After repeated cycles of drilling and chip removal, once the designated depth is reached, the external drive motor rotates in the opposite direction and moves upward, causing the locking pin 91 above the connecting pin 9 to enter the rotating disk slot 52. The external drive motor then rotates in the opposite direction, driving the rotating disk 51 to rotate, while the hollow magnetic shaft 1 does not rotate. The rotating disk 51 drives the four connecting gears 53 to rotate, and the four connecting gears 53 drive the bottom drive gear 56 to rotate via the transmission shaft 54.

[0057] The drive gear 56 rotates to control the movement of the rack 42, which in turn pushes the roller 44 to slide. The sliding of the roller 44 controls the rotation of the cutter 45 around a fixed point. After the cutting head of the cutter 45 contacts the core material on the inner wall, the rotating disk 51 continues to rotate. Due to the resistance generated by the lunar rock or lunar soil inside the cutter 45, the rotation of the rotating disk 51 can drive the entire core drilling tool to rotate. Combined with the inward pressure of the cutter 45, the cutting effect is achieved. During the cutting process of the cutter 45, the elastic rope 46 at the bottom tightens simultaneously, causing the cloth bag 47 to contract and close, thereby achieving the sealing effect at the bottom.

[0058] Therefore, the present invention employs a lunar coring tool with active chip removal and cutting and closing functions, which can remove chips during the drilling process, reduce the frictional force generated by the chips during drilling, and thus make the drilling depth deeper. When encountering harder geological conditions, it can actively cut and close the chip to achieve a complete coring process.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A lunar coring tool with active chip removal and cutting / closing functions, characterized in that: The device includes a hollow magnetic shaft (1), a power transmission assembly is provided at the top of the hollow magnetic shaft (1), a cutting and closing assembly is connected to the bottom of the hollow magnetic shaft (1), the upper part of the cutting and closing assembly is connected to the power transmission assembly, and a drill bit (2) is fixedly connected to the bottom. The center of the drill bit (2) is a hollow cavity structure and is connected to the inner cavity of the hollow magnetic shaft (1) and the cutting and closing assembly. A chip removal assembly is provided above the cutting and closing assembly and sleeved on the outer wall of the hollow magnetic shaft (1). The power transmission assembly includes a connecting post (9), the top of the connecting post (9) is provided with a thread, and several sets of two clips (91) arranged longitudinally with the top shorter than the bottom are provided on the side wall below the connecting post (9). The bottom of the connecting post (9) is provided with a connecting ring (8) fixed to the top of the hollow magnetic shaft (1). The inner wall of the connecting ring (8) is provided with a transverse groove (81) that is radially encircling and axially distributed, and both are matched with the number of sets and the spacing of the clips (91). A rotating disk (51) is provided above the connecting ring (8) and sleeved inside the connecting post (9). The inner wall of the rotating disk (51) near the connecting post (9) is provided with a rotating disk slot (52) that matches the number of sets and the spacing of the locking posts (91). The interior of the rotating disk (51) is configured as a cavity structure with internal teeth. A connecting gear (53) is engaged inside the rotating disk (51). The bottom of the connecting gear (53) is connected to a transmission shaft (54) that is vertically distributed outside the hollow magnetic shaft (1). The top of the transmission shaft (54) is engaged on the fixing ring (55). The fixing ring (55) is sleeved and fixed on the outer wall of the connecting ring (8). The bottom of the transmission shaft (54) is engaged in the cutting and closing assembly and is meshed with the cutting and closing assembly through the drive gear (56). The chip removal assembly includes a coil mover (6) movably sleeved on the side wall of the hollow magnetic shaft (1), and chip removal units (7) slidably connected on the coil mover (6) and arranged closely along the transverse direction of the coil mover (6); a drive shaft (54) passes through the coil mover (6), and a conductive slip ring (10) is tightly sleeved above the drive shaft (54). The outer wall of the coil mover (6) is provided with a fixed guide rail (61) and a fixed block (62) connected to the chip removal unit (7). The chip removal unit (7) includes a base plate (71), a positioning slider (72) that is slidably connected to the fixed guide rail (61) is provided on the inner side of the base plate (71), a groove (73) is provided in the middle of the base plate (71), a connecting slider (74) that is fixedly connected to the fixed block (62) is slidably provided in the groove (73); a top plate (75) is connected to the top of the base plate (71), a first side plate (77) is connected to the outer side of the top plate (75) through a hinge (76), a second side plate (78) is connected to both sides of the first side plate (77) through a hinge (76), a support spring (79) is provided between the base plate (71) and the first side plate (77), and a shrinkage assembly fixed on the first side plate (77) and the second side plate (78) is connected to the outer side of the connecting slider (74) through the groove (73); The shrinking assembly includes connecting rings (710) symmetrically arranged on the bottom of the outer side of the second side plate (78) on both sides. The two connecting rings (710) are respectively provided with a first connecting rod (711) and a second connecting rod (713) connected in a straight line. The inner side of the first connecting rod (711) is provided with a first fixing block (712). The two second connecting rods (713) are connected to the third connecting rod (714) on the inner side. The third connecting rod (714) is fitted with a second fixing block (715) fixed on the top of the first side plate (77). The inner end of the third connecting rod (714) is connected to a fourth connecting rod (716). The inner side of the fourth connecting rod (716) is fitted with a third fixing block (717) fixed on the top of the first side plate (77). The inner end of the fourth connecting rod (716) is connected to a fifth connecting rod (718). The inner end of the fifth connecting rod (718) passes through the slide groove (73) and is connected to the connecting slider (74).

2. The lunar coring drill of claim 1, wherein: The cutting and finishing assembly includes a cutting and finishing assembly housing (3) fixed on the bottom side wall of the hollow magnetic shaft (1). An annular mounting plate (41) sleeved on the drive shaft (54) is fixed inside the cutting and finishing assembly housing (3). A rack (42) meshing with the drive gear (56) is provided on the annular mounting plate (41). A limiting post (43) fixed on the annular mounting plate (41) is provided on the outside of the rack (42). The outer end of the rack (42) is in contact with the inner wall of the cutting and finishing assembly housing (3). A roller (44) is connected to the inner end of the rack (42). A cutter (45) rotatably connected to the annular mounting plate (41) is provided on the inner side of the roller (44).

3. The lunar coring drill of claim 2, wherein: The cutting and finishing assembly also includes an elastic rope (46) threaded through the bottom of the drive shaft (54), and a cloth bag (47) is attached to the elastic rope (46).

4. The lunar coring drill of claim 1, wherein: The height of the base plate (71) is greater than the height of the coil mover (6).

Images