Steel-flex coupling self-adapting coring mechanism and sampling method for mars profile sampling

Abstract

The application discloses a steel-soft coupling adaptive coring mechanism for Mars profile sampling and a sampling method, relates to the technical field of deep space exploration, and solves the problems of sample loss and sample leakage caused by poor cutting force of the existing coring mechanism and the problem of complex structure and easy jamming. The application comprises a pressure disc, a guide rod, an elastic steel mesh, a needle roller bearing and a soft bag, the pressure disc is arranged in a drill rod, the pressure disc pushes the guide rod downward under the action of a lead screw, and then drives the rotation of the inner ring of the needle roller bearing, the inner ring of the needle roller bearing is connected with the upper end of the elastic steel mesh, the rotation of the inner ring of the needle roller bearing drives the torsion of the upper and lower ends of the elastic steel mesh to realize the closing operation, and the sample is encapsulated in the soft bag. After the sample enters the cavity of the coring mechanism, the sample is quickly cut off and sealed through the sealing property of the soft bag and the rigid contraction of the elastic steel mesh; the transmission process is simplified by the needle roller bearing in the mechanism, the transmission structure is simple, the sample particles are not prone to jamming after entering the inside of the mechanism, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of deep space exploration technology, specifically to a steel-flexible coupling adaptive coring mechanism and sampling method for Mars profile sampling. Background Technology

[0002] my country's current goal for Mars sample return mission is to conduct unmanned Mars sample return and return it to Earth before 2030. Mars profile sampling and packaging technology is a key supporting technology for achieving this mission objective. In previous sampling missions, after the sample entered the sample chamber, due to the high density of the sample and the poor cutting force of the core sampling mechanism, the sample could not be completely cut off or the bottom could not be completely sealed after cutting off. Therefore, sample loss or leakage was prone to occur after the drill was lifted, resulting in insufficient sample content to meet experimental requirements. During the sampling process, when the sample enters the sample storage chamber, the small size of the sample particles and the complexity of the internal core sampling mechanism can easily cause the mechanism to jam after the particles enter, affecting the service life of the entire drill and the core sampling efficiency. Summary of the Invention

[0003] To address the aforementioned problems of poor cutting force, incomplete cutting, or incomplete sealing of the bottom after cutting leading to sample loss and leakage, as well as the susceptibility to jamming due to complex structures in existing coring mechanisms, this invention proposes a steel-flexible coupling adaptive coring mechanism and sampling method for Mars profile sampling. After the sample enters the cavity of the coring mechanism, the invention uses a combination of an elastic steel mesh and a soft bag to cut and seal the sample. The sealing performance of the soft bag and the rigid contraction of the elastic steel mesh quickly cut and seal the sample, preventing it from falling out and allowing for a large sample volume per operation. Furthermore, the needle roller bearings inside the mechanism simplify the movement of the transmission components, resulting in a simpler transmission structure and reducing the likelihood of sample particles jamming after entering the mechanism, thus extending its service life.

[0004] This invention proposes a steel-flexible coupling adaptive coring mechanism for Mars profile sampling, specifically comprising a base, several guide rods, a coring drill, an elastic steel mesh, needle roller bearings, a center drill, a disc spring, a pressure plate, a lead screw, a drill rod, and a power unit. The power unit is mounted on the upper end of the drill rod, and its lower end is connected to the lead screw. The lead screw has a threaded section at both its upper and lower ends, with opposite directions of rotation. The base is mounted on the inner wall of the drill rod. A pressure plate is fitted at the threaded position at the upper end of the lead screw, and a center drill is fitted at the threaded position at the lower end. The pressure plate and the base are slidably connected. The outer ring of the needle roller bearing is mounted on the inner wall of the base. The upper end of the inner ring of the needle roller bearing is slidably connected to several guide rods, and its lower end is connected to the elastic steel mesh. The lower end of the elastic steel mesh is connected to the base. A lead screw base is located in the middle of the lead screw. The upper end of the guide rod is positioned between the lead screw base and the pressure plate, and a disc spring is positioned between the upper end of the guide rod and the lead screw base. The coring drill is located at the lower end of the drill rod.

[0005] Furthermore, the steel-flexible coupling adaptive core-taking mechanism also includes a soft bag, the upper end of which is connected to the upper end of the needle roller bearing, and the lower end of which passes through the interior of the elastic steel mesh and is connected to the lower end of the base.

[0006] Furthermore, the upper and lower ends of the base are fixed to the drill rod by several screws, the screws at the lower end of the base pass through the base and a fixing block is provided at the end of the screw; the lower ends of the soft bag and the elastic steel mesh are connected to the fixing block.

[0007] Furthermore, the needle roller bearing includes a needle roller bearing sleeve and a needle roller bearing section. The needle roller bearing section is disposed on the inner wall of the base, and the needle roller bearing sleeve is rotatably disposed on the inner ring of the needle roller bearing section. The upper half of the needle roller bearing sleeve is provided with several slides, and the lower end of the guide rod is provided with a roller. The roller and the slides cooperate to slide. The lower end of the needle roller bearing sleeve is connected to an elastic steel mesh.

[0008] Furthermore, the guide rod is an L-shaped rod, with the short side of the L-shape positioned between the lead screw base and the pressure plate, and parallel to the lead screw base; a roller is provided at the end of the long side of the L-shape of the guide rod.

[0009] Furthermore, a bearing is provided between the lead screw and the drill rod.

[0010] A sampling method employing the aforementioned steel-flexible coupling adaptive coring mechanism for Mars profile sampling, characterized by comprising the following steps:

[0011] a. The power unit drives the central drill to extend from inside the drill rod, and the core sampling mechanism drills into the Martian soil sample at a set depth;

[0012] b. The power unit drives the center drill to retract upwards via a lead screw, at which point the pressure plate moves downwards under the influence of the lead screw;

[0013] c. The drill pipe and core drill are drilled further down to a depth equal to the retraction stroke of the center drill in step b.

[0014] d. The power unit drives the pressure plate to move downward through the lead screw, which in turn moves several guide rods downward. The guide rods drive the inner ring of the needle roller bearing to rotate, which in turn rotates the elastic steel mesh to close the opening.

[0015] e. Reverse and lift the core-taking mechanism. After lifting, the power unit drives the center drill to move downward while the pressure plate moves upward. The pressure plate separates from the upper end of the guide rod. The guide rod moves upward under the action of the disc spring, causing the inner ring of the needle roller bearing to reverse. The elastic steel mesh opens, and the sample is discharged from the core-taking mechanism.

[0016] The beneficial effects of the steel-flexible coupling adaptive coring mechanism and sampling method for Mars profile sampling described in this invention are as follows:

[0017] (1) The steel-flexible coupling adaptive coring mechanism and sampling method for Mars profile sampling described in this invention, through the set elastic steel mesh component, the center of the elastic steel mesh can be tightened by rotating the elastic steel mesh, and there is no gap at the center tightening point, thus avoiding the occurrence of sample leakage during the drilling process;

[0018] (2) The steel-flexible coupling adaptive coring mechanism and sampling method for Mars profile sampling described in this invention combines an elastic steel mesh with a soft bag through a rigid-flexible coupling coring method. The elastic steel mesh provides sufficient sealing force for the soft bag, and the soft bag can block the gaps between the steel mesh, so that the sample is preserved intact throughout the entire sealing process and is not easy to lose.

[0019] (3) The steel-flexible coupling adaptive coring mechanism and sampling method for Mars profile sampling described in this invention can convert the simple up-and-down movement of the guide rod into the rotational movement of the elastic steel mesh through the set needle roller bearing. The movement mode of the guide rod is relatively simple, so the structure of the transmission component connected to the guide rod is relatively simple, the coring mechanism is not prone to failure, and the success rate of sampling and packaging is improved. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] In the attached diagram:

[0022] Figure 1 This is a structural schematic diagram of a steel-flexible coupling adaptive coring mechanism for Mars profile sampling as described in this invention.

[0023] Figure 2 This is a schematic diagram of the needle roller bearing structure of a steel-flexible coupling adaptive coring mechanism for Mars profile sampling as described in this invention.

[0024] Among them: 1-motor, 2-reducer, 3-deep groove ball bearing, 4-base, 5-screw one, 6-guide rod, 7-lead screw base, 8-soft bag, 9-fixing block, 10-core drill, 11-screw two, 12-elastic steel mesh, 13-needle roller bearing, 14-center drill, 15-disc spring, 16-pressure plate, 17-lead screw, 18-drill rod, 19-roller, 20-slide rail, 21-needle roller bearing cylinder, 22-needle roller bearing section. Detailed Implementation

[0025] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0026] Specific implementation method one: See Figures 1-2This embodiment is described in detail. The steel-flexible coupling adaptive coring mechanism for Mars profile sampling described in this embodiment specifically includes a base 4, several guide rods 6, a coring drill 10, an elastic steel mesh 12, a needle roller bearing 13, a center drill 14, a disc spring 15, a pressure plate 16, a lead screw 17, a drill rod 18, and a power unit. The upper end of the drill rod 18 is equipped with the power unit, and the lower end of the power unit is connected to the lead screw 17. The upper and lower ends of the lead screw 17 are respectively provided with a thread, and the two thread sections have opposite directions of rotation. The base 4 is provided on the inner wall of the drill rod 18. The pressure plate 16 is sleeved at the threaded position at the upper end of the lead screw 17, and the center drill 14 is sleeved at the threaded position at the lower end. The upper and lower thread sections drive the pressure plate 16 and the center drill 14 respectively, causing the pressure plate 16 and the center drill 14 to... The directions of movement are opposite; the pressure plate 16 and the base 4 are slidably connected, and the base 4 limits the pressure plate 16 so that the pressure plate 16 can only move up and down on the lead screw 17 under the action of the base 4, and will not rotate; the outer ring of the needle roller bearing 13 is set on the inner wall of the base 4; the upper end of the inner ring of the needle roller bearing 13 is slidably connected to several guide rods 6, the lower end of the inner ring is connected to the elastic steel mesh 12, and the outer ring and the inner ring of the needle roller bearing 13 are rotatably connected; the lower end of the elastic steel mesh 12 is connected to the base 4; a lead screw base 7 is set in the middle of the lead screw 17; the upper end of the guide rod 6 is set between the lead screw base 7 and the pressure plate 16, and a disc spring 15 is set between the upper end of the guide rod 6 and the lead screw base 7; a core drill 10 is set at the lower end of the drill rod 18, and the core drill 10 is a ring drill bit. The power device is a motor 1 and a reducer 2, the output end of the motor 1 is connected to the reducer 2, and the lower end of the reducer 2 is connected to the lead screw 17, thereby driving the lead screw 17 to rotate.

[0027] The steel-flexible coupling adaptive coring mechanism also includes a soft bag 8, the upper end of which is connected to the upper end of the needle roller bearing 13, and the lower end of which passes through the inside of the elastic steel mesh 12 and is connected to the lower end of the base 4. The soft bag 8 is the main component for preserving Martian soil samples. When the elastic steel mesh 12 tightens, it will cause the soft bag 8 to tighten together.

[0028] The upper end of the base 4 is fixed to the inner wall of the drill rod 18 by a number of screws 5, and the lower end of the base 4 is fixed to the inner wall of the drill rod 18 by a number of screws 11. The screws 11 pass through the base 4 and are provided with fixing blocks 9 at the ends of the screws. The lower ends of the soft bag 8 and the elastic steel mesh 12 are connected to the fixing blocks 9.

[0029] The needle roller bearing 13 includes a needle roller bearing cylinder 21 and a needle roller bearing section 22. The needle roller bearing section 22 is disposed on the inner wall of the base 4, and the needle roller bearing cylinder 21 is rotatably disposed within the inner ring of the needle roller bearing section 22. The upper half of the needle roller bearing cylinder 21 is provided with several slides 20, and the lower end of the guide rod 6 is provided with a roller 19, which slides in cooperation with the slides 20. The lower end of the needle roller bearing cylinder 21 is connected to the elastic steel mesh 12. The slides 20 are inclined slides. When the guide rod 6 moves downward, the roller 19 slides downward in the slides 20, thereby driving the needle roller bearing cylinder 21 to rotate within the needle roller bearing section 22.

[0030] The guide rod 6 is an L-shaped rod. The short side of the L-shape of the guide rod 6 is located between the lead screw base 7 and the pressure plate 16 and is parallel to the lead screw base 7. A disc spring 15 is provided between the short side of the L-shape of the guide rod 6 and the lead screw base 7. A roller 19 is provided at the end of the long side of the L-shape of the guide rod 6.

[0031] A bearing is provided between the lead screw 17 and the drill rod 18, and the bearing is a deep groove ball bearing 3.

[0032] A sampling method employing the aforementioned steel-flexible coupling adaptive coring mechanism for Mars profile sampling, characterized by comprising the following steps:

[0033] a. The motor 1 and the reducer 2 drive the center drill 14 to extend from the drill rod 18, and the core sampling mechanism drills into the Martian soil sample at a set depth.

[0034] b. Motor 1 and reducer 2 drive lead screw 17, lead screw 17 drives center drill 14 to retract upwards, at which time pressure plate 16 moves downwards under the drive of lead screw 17;

[0035] c. Drill pipe 18 and core drill 10 drill further downwards to a depth equal to the retraction stroke of center drill 14 in step b.

[0036] d. The motor 1 and the reducer 2 drive the pressure plate 16 to move down through the lead screw 17. The pressure plate 16 pushes several guide rods 6 downward. The several guide rods 6 drive the needle roller bearing 13 needle roller bearing cylinder 21 to rotate through the roller 19. The needle roller bearing cylinder 21 drives the elastic steel mesh 12 to rotate. The upper and lower ends of the elastic steel mesh 12 are twisted to achieve the closing operation.

[0037] e. Reverse and lift the entire core-taking mechanism. After lifting, the motor 1 and reducer 2 drive the center drill 14 to move downward through the lead screw 17, while the pressure plate 16 moves upward. The pressure plate 16 separates from the upper end of the guide rod 6. The guide rod 6 moves upward under the elastic force of the disc spring 15, thereby driving the needle roller bearing sleeve 21 of the needle roller bearing 13 to reverse. The elastic steel mesh 12 opens, and the sample is discharged from the core-taking mechanism.

[0038] In summary, the steel-flexible coupling adaptive coring mechanism and sampling method for Mars profile sampling described in this invention utilizes the elastic steel mesh 12 component. The elastic steel mesh 12 can be rotated to tighten its center, ensuring a seamless center and preventing sample leakage during drilling. Furthermore, the steel-flexible coupling adaptive coring mechanism and sampling method for Mars profile sampling combines the elastic steel mesh 12 with a soft bag 8 using a rigid-flexible coupling coring method. The elastic steel mesh 12 provides sufficient sealing force to the soft bag 8, which can seal the gaps between the elastic steel meshes 12, ensuring complete sample preservation throughout the sealing process and minimizing sample loss. Finally, the steel-flexible coupling adaptive coring mechanism and sampling method for Mars profile sampling utilizes the needle roller bearing 13 to convert the simple up-and-down movement of the guide rod 6 into the rotational movement of the elastic steel mesh 12. The movement of the guide rod 6 is relatively simple, resulting in a simpler transmission component structure connected to the guide rod 6. This reduces the likelihood of core failure and improves the success rate of sampling and sealing.

[0039] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the invention. They can also be reasonable combinations of the features described in the above embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel-flexible coupling adaptive coring mechanism for Mars profile sampling, characterized in that: The system includes a base (4), several guide rods (6), a core drill (10), an elastic steel mesh (12), a needle roller bearing (13), a center drill (14), a disc spring (15), a pressure plate (16), a lead screw (17), a drill rod (18), and a power unit. The upper end of the drill rod (18) is equipped with a power unit, and the lower end of the power unit is connected to the lead screw (17). The upper and lower ends of the lead screw (17) are respectively provided with a thread, and the two threads rotate in opposite directions. The base (4) is provided on the inner wall of the drill rod (18). The pressure plate (16) is sleeved at the thread position at the upper end of the lead screw (17), and a pressure plate (16) is sleeved at the thread position at the lower end. A center drill (14); a pressure plate (16) and a base (4) are slidably connected; the outer ring of a needle roller bearing (13) is set on the inner wall of the base (4); the upper end of the inner ring of the needle roller bearing (13) is slidably connected to several guide rods (6), and the lower end of the inner ring is connected to an elastic steel mesh (12); the lower end of the elastic steel mesh (12) is connected to the base (4); a screw base (7) is set in the middle of the screw (17); the upper end of the guide rod (6) is set between the screw base (7) and the pressure plate (16), and a disc spring (15) is set between the upper end of the guide rod (6) and the screw base (7); a core drill (10) is set at the lower end of the drill rod (18). The steel-flexible coupling adaptive core-taking mechanism also includes a soft bag (8), the upper end of which is connected to the upper end of the needle roller bearing (13), and the lower end passes through the interior of the elastic steel mesh (12) and is connected to the lower end of the base (4). The needle roller bearing (13) includes a needle roller bearing cylinder (21) and a needle roller bearing section (22). The needle roller bearing section (22) is disposed on the inner wall of the base (4), and the needle roller bearing cylinder (21) is rotatably disposed on the inner ring of the needle roller bearing section (22). The upper half of the needle roller bearing cylinder (21) is provided with several slides (20), and the lower end of the guide rod (6) is provided with a roller (19). The roller (19) and the slides (20) cooperate to slide. The lower end of the needle roller bearing cylinder (21) is connected to the elastic steel mesh (12).

2. The steel-flexible coupling adaptive coring mechanism for Mars profile sampling according to claim 1, characterized in that: The base (4) is fixed to the drill rod (18) at both ends by a number of screws. The screw at the lower end of the base (4) passes through the base (4) and a fixing block (9) is provided at the end of the screw. The lower ends of the soft bag (8) and the elastic steel mesh (12) are connected to the fixing block (9).

3. The steel-flexible coupling adaptive coring mechanism for Mars profile sampling according to claim 1, characterized in that: The guide rod (6) is an L-shaped rod. The short side of the L-shape of the guide rod (6) is located between the lead screw base (7) and the pressure plate (16) and is parallel to the lead screw base (7). A roller (19) is provided at the end of the long side of the L-shape of the guide rod (6).

4. The steel-flexible coupling adaptive coring mechanism for Mars profile sampling according to claim 1, characterized in that: A bearing is provided between the lead screw (17) and the drill rod (18).

5. A sampling method using the steel-flexible coupling adaptive coring mechanism for Mars profile sampling as described in any one of claims 1-4, characterized in that: Includes the following steps: a. The power unit drives the center drill (14) to extend from the drill rod (18), and the core sampling mechanism drills into the Martian soil sample at a set depth; b. The power unit drives the center drill (14) to retract upward through the lead screw (17), at which time the pressure plate (16) moves downward under the drive of the lead screw (17); c. The drill rod (18) and the core drill (10) are drilled further down to a depth equal to the retraction stroke of the center drill (14) in step b; d. The power unit drives the pressure plate (16) to move down through the lead screw (17), which in turn moves several guide rods (6) downward. The guide rods (6) drive the inner ring of the needle roller bearing (13) to rotate, which in turn rotates the elastic steel mesh (12) to close the opening. e. Reverse the core-taking mechanism and lift it up. After lifting, the power unit drives the center drill (14) to move downward while the pressure plate (16) moves upward. The pressure plate (16) separates from the upper end of the guide rod (6). The guide rod (6) moves upward under the action of the disc spring (15), causing the inner ring of the needle roller bearing (13) to reverse. The elastic steel mesh (12) opens, and the sample is discharged from the core-taking mechanism.

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