A soft-bag self-adapting coring mechanism for mars profile sampling

Abstract

The application provides a soft-bag type self-adaptive coring mechanism for Mars profile sampling, and belongs to the field of deep space exploration. The application solves the problem of sample completeness difference of a traditional sampling mechanism. The mechanism comprises a shell, which is hollow, and an electric control transmission assembly arranged at one end in the shell; a driving piece, which is sleeved in the shell, and a limiting assembly arranged in the middle of the driving piece; a pushing piece, a center drill connected with the driving piece, and the driving piece used for driving the pushing piece and the center drill to slide; a soft bag; a blocking ring, which is slidingly arranged between the limiting assembly and the center drill; and a rope assembly. When sampling, the center drill is arranged in the blocking ring, and one end of the blocking ring is inserted into the soft bag. When encapsulating, the center drill drives the blocking ring to exit the soft bag and compresses an elastic piece. A rope control assembly is used for coupling with the other end of the rope assembly and the limiting assembly under the pushing of the pushing piece, and then the rope control assembly rotates with the driving piece and pulls the rope assembly to tighten the bag opening of the soft bag. The mechanism is mainly used for profile sampling.

Description

Technical Field

[0001] This invention belongs to the field of deep space exploration, and in particular relates to a soft-bag adaptive coring mechanism for Mars profile sampling. Background Technology

[0002] my country's current goal for its Mars sample return mission is to conduct unmanned Mars sample return and bring it back to Earth before 2030. Mars profile sampling and packaging technology is a key supporting technology for achieving the mission's objectives.

[0003] In previous sampling missions, after the sample entered the sampling chamber, the friction against the inner wall of the chamber easily caused the sample to break and deform, resulting in a lack of authenticity in sample density and structure, failing to meet requirements. It is necessary to reduce the stress on the sample within the chamber and restore sample integrity to meet experimental requirements. During the drilling process after sampling, the fine sample particles are prone to leakage, making the sample volume insufficient for technical requirements. Furthermore, fine particles can easily enter the internal mechanism, causing jamming of the core sampling mechanism, affecting the subsequent lifespan of the entire drilling tool and sampling efficiency. Summary of the Invention

[0004] In view of this, the present invention aims to propose a soft-bag adaptive coring mechanism for Mars profile sampling, in order to solve the problem of poor sample integrity in traditional sampling mechanisms.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a soft-bag adaptive coring mechanism for Mars profile sampling, comprising:

[0006] The outer shell is hollow, with an electronically controlled transmission component located at one end of the interior.

[0007] A driving component is fitted inside the housing, and a limiting component is provided in the middle of the driving component;

[0008] A pusher is slidably disposed between the electronically controlled transmission assembly and the limiting assembly, and the pusher is connected to the drive assembly;

[0009] A center drill is slidably disposed within the housing at one end away from the electronically controlled transmission assembly. The center drill is connected to a drive component, which is used to drive the push component and the center drill to slide.

[0010] The soft bag is hollow in shape and its outer wall is coupled to the inner wall of the outer shell;

[0011] A stop ring is slidably disposed between the limiting component and the center drill, and an elastic element is disposed between the stop ring and the limiting component;

[0012] The rope assembly has one end threaded into the opening of the soft bag near the central drill, and the other end positioned between the pusher and the limiting assembly; and

[0013] The drawstring control assembly is slidably connected between the pusher and the limiting assembly. In the sampling state, the center drill is set inside the guard ring and one end of the guard ring is inserted into the soft bag. During the sealing process, the center drill drives the guard ring out of the soft bag and compresses the elastic element. The drawstring control assembly is used to couple with the other end of the drawstring assembly and the limiting assembly simultaneously under the push of the pusher. The drawstring control assembly rotates with the drive and pulls the drawstring assembly to tighten the opening of the soft bag.

[0014] Furthermore, the outer wall of the outer shell is provided with a first rope inlet and a second rope inlet at axial intervals. The rope groove is provided on the outer wall of the outer shell and connects the first rope inlet and the second rope inlet. One end of the rope assembly passes through the first rope inlet, and the other end passes through the second rope inlet and is connected to the soft bag. The middle section is provided in the rope groove.

[0015] Furthermore, the electronically controlled transmission assembly includes a motor, a reducer, and a motor bracket. The motor is connected to the inner wall of the housing via the motor bracket, and the output end of the motor is connected to the drive component via the reducer.

[0016] Furthermore, the driving component is a bidirectional lead screw, and both the pusher and the center drill are threadedly connected to the bidirectional lead screw.

[0017] Furthermore, the limiting component is a spline.

[0018] Furthermore, the pull rope control assembly includes a thrust ball bearing, a spool, and a disc spring arranged sequentially from the proximal end to the distal end of the pusher. The thrust ball bearing and the spool are slidably connected to the housing. The disc spring is sleeved on the limiting assembly and its length in the relaxed state is greater than or equal to the axial length of the limiting assembly. A spool extension rod is provided on the spool.

[0019] Furthermore, the rope assembly includes a base, a slot, and a rope. The base is provided with a slot. One end of the rope enters the housing through a first rope inlet and is connected to the base. When the spool extension rod is inserted into the slot, the disc spring is compressed by the spool. The other end of the rope is connected to the opening of the soft bag.

[0020] Furthermore, a sealing ring is provided between the guard ring and the center drill.

[0021] Furthermore, the elastic element is a spring.

[0022] Furthermore, the guard ring is a cylindrical steel ring.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. This core sampling mechanism uses a soft bag pull-in method for cutting and sealing, which can basically achieve no sample leakage during the drilling process;

[0025] 2. This core sampling mechanism, by setting up a baffle ring, can isolate the sample from the soft bag during the sampling stage, so that the sample can smoothly enter the baffle ring near the injection end. The inner wall of the baffle ring does not cause frictional obstruction to the sample and will not affect the integrity of the sample.

[0026] 3. This core sampling mechanism uses a barrier ring and an elastic element to prevent the barrier ring from moving upward with the sample when it enters the barrier ring. The sample cannot enter the gap between the outside of the barrier ring and the soft bag, so that no sample remains in the part other than the inside of the barrier ring during the sampling process.

[0027] 4. This core-taking mechanism features a pull-cord control component, which ensures a smooth transition between sample entry and bag tightening during the sampling process. Additionally, thanks to the disc spring and spring mechanism, the sample can be reset during the retraction process, and the soft bag opening can automatically open in conjunction with the sample weight. Attached Figure Description

[0028] The accompanying drawings, which form part of this invention, 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 undue limitation of the invention. In the drawings:

[0029] Figure 1 This is an overall cross-sectional view of a soft-bag adaptive coring mechanism for Mars profile sampling as described in this invention.

[0030] Figure 2 This is a schematic diagram of the structure of the electronically controlled transmission assembly described in this invention;

[0031] Figure 3 This is a cross-sectional view of the pull rope control assembly described in this invention;

[0032] Figure 4 As described in this invention Figure 3 Perspective view of part A;

[0033] Figure 5 This is a schematic diagram showing the distribution of the spring, guard ring, sealing ring, and center drill described in this invention.

[0034] Figure 6 As described in this invention Figure 5 Enlarged view of Part B;

[0035] Figure 7 This is a schematic diagram showing the distribution of the first rope inlet, the second rope inlet, and the rope groove as described in this invention.

[0036] 1. Electrically controlled transmission assembly; 2. Rope pulling control assembly; 8. Motor; 9. Reducer; 10. Drive component; 11. Motor bracket; 15. Push component; 16. Thrust ball bearing; 17. Borehole; 18. Disc spring; 19. Spline; 20. Base; 21. Slot; 22. Borehole extension rod; 25. Spring; 26. Guard ring; 27. Sealing ring; 28. Center drill; 29. ​​Core drill; 30. Rope; 31. Soft bag; 32. First rope inlet; 33. Second rope inlet; 34. Rope groove. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0038] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this invention are defined based on the orientation or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In the description of this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Referring to the accompanying drawings, this embodiment describes a soft-bag adaptive coring mechanism for Mars profile sampling, comprising:

[0041] The outer shell is hollow, with an electric control transmission component 1 installed at one end inside. An outer drill bit is installed on the outer shell, and a core drill 29 is installed at the end away from the electric control transmission component 1. The core drill 29 can be installed in a detachable manner, which facilitates the replacement of the core drill 29 after it is worn.

[0042] The driving component 10 is sleeved inside the housing, and a limiting component is provided in the middle of the driving component 10; the limiting component can divide the inside of the housing, so as to distinguish and isolate the sampling area and the driving area.

[0043] The pusher 15 is slidably disposed between the electronically controlled transmission assembly 1 and the limiting assembly. The pusher 15 is connected to the drive assembly 10. Specifically, the pusher 15 is a pressure plate. The pressure plate has a threaded hole in the middle that is threadedly connected to the drive assembly 10. When the drive assembly 10 rotates, the pressure plate is driven to move through the threaded engagement. The direction of movement depends on the driving direction of the electronically controlled transmission assembly 1.

[0044] A center drill 28 is slidably disposed within the housing at one end away from the electronically controlled transmission assembly 1. The center drill 28 is connected to the drive component 10, which drives the pusher component 15 and the center drill 28 to slide. In normal drilling mode, the center drill 28 can block the end of the housing near the core drill 29 to facilitate normal drilling. A threaded hole is provided at the end of the center drill 28 away from the drilling working surface, and it is threadedly connected to the drive component 10 through the threaded hole. The rotation of the drive component 10 can drive the center drill 28 to move, thereby achieving the switching of different working states.

[0045] The soft bag 31 is hollow in shape and its outer wall is coupled to the inner wall of the outer shell. The soft bag 31 is a cloth bag, which can be connected to the inner wall of the outer shell by adhesive or by hook. The fixing method can be selected according to actual needs. Any method that can fix the soft bag 31 well is acceptable.

[0046] The baffle ring 26 is slidably disposed between the limiting component and the center drill 28, and an elastic element is provided between the baffle ring 26 and the limiting component. The elastic element can support the baffle ring 26 during the sampling stage to prevent the baffle ring 26 from shifting when the sample enters. During the sample withdrawal stage, it can also help the baffle ring 26 to reset by restoring its deformation, thereby helping the sample in the soft bag 31 to be discharged.

[0047] The rope assembly has one end threaded into the opening of the soft bag 31 near the central drill 28, and the other end positioned between the pusher 15 and the limiting assembly; and

[0048] The drawstring control assembly 2 is slidably connected between the pusher 15 and the limiting assembly. In the sampling state, the center drill 28 is set inside the barrier ring 26 and one end of the barrier ring 26 is inserted into the soft bag 31. During the sealing process, the center drill 28 drives the barrier ring 26 to exit the soft bag 31 and compress the elastic element. The drawstring control assembly 2 is used to couple with the other end of the rope assembly and the limiting assembly simultaneously under the push of the pusher 15. The drawstring control assembly 2 rotates with the drive member 10 and pulls the rope assembly to tighten the opening of the soft bag 31.

[0049] In this embodiment, the outer wall of the outer casing is provided with a first rope inlet 32 ​​and a second rope inlet 33 spaced apart along the axial direction. The rope groove 34 is provided on the outer wall of the outer casing and connects the first rope inlet 32 ​​and the second rope inlet 33. One end of the rope assembly passes through the first rope inlet 32, and the other end passes through the second rope inlet 33 and is connected to the soft bag 31. The middle section is located in the rope groove 34. The external drill bit provided on the outer casing can protect the outer casing and the rope assembly. At the same time, the external drill bit is detachable, which allows for replacement of the external drill bit when wear occurs.

[0050] In this embodiment, the electronically controlled transmission assembly 1 includes a motor 8, a reducer 9, and a motor bracket 11. The motor 8 is connected to the inner wall of the housing via the motor bracket 11, and the output end of the motor 8 is connected to the drive component 10 via the reducer 9. The motor 8 can drive the drive component 10 to rotate via the reducer 9, and the rotation direction of the drive component 10 depends on the rotation direction of the motor 8.

[0051] In this embodiment, the driving component 10 is a bidirectional lead screw, and the pushing component 15 and the center drill 28 are both threadedly connected to the bidirectional lead screw. By setting the driving component 10 as a bidirectional lead screw, the pushing component 15 and the center drill 28 can move in opposite directions or in reverse direction when the bidirectional lead screw rotates.

[0052] In this embodiment, the limiting component is spline 19.

[0053] In this embodiment, the pull rope control assembly 2 includes a thrust ball bearing 16, a spool 17, and a disc spring 18 arranged sequentially from the proximal end to the distal end of the pusher 15. The thrust ball bearing 16 and the spool 17 are slidably connected to the outer shell. The disc spring 18 is sleeved on the limiting assembly and its length in the relaxed state is greater than or equal to the axial length of the limiting assembly. The spool 17 is provided with a spool extension rod 22. A spline groove is provided on the spool 17 to mate with the spline 19. When the pusher 15 moves to push the thrust ball bearing 16 and the spool 17 toward the spline 19, it will gradually compress the disc spring 18, causing the spline 19 to mate with the spline groove. At the same time, the spool extension rod 22 is inserted into the slot 21. Since the spline 19 mates with the spline groove and is connected to the double-acting screw, when the double-acting screw rotates, it will drive the spool 17 to rotate through the spline 19. In turn, the spool 17 will drive the base 20 to move through the spool extension rod 22. The base 20 will pull the rope 30, so that the rope 30 is wound around the spool 17. In this way, the other end of the rope 30 will tighten the opening of the soft bag 31, achieving the function of sealing the sample.

[0054] In this embodiment, the rope assembly includes a base 20, a slot 21, and a rope 30. The base 20 is provided with a slot 21. One end of the rope 30 enters the outer casing through the first rope inlet 32 ​​and is connected to the base 20. When the spool extension rod 22 is inserted into the slot 21, the disc spring 18 is compressed by the spool 17. The other end of the rope 30 is connected to the opening of the soft bag 31.

[0055] In this embodiment, a sealing ring 27 is provided between the guard ring 26 and the center drill 28. The sealing ring prevents the sample from moving into the mechanism, thereby eliminating the possibility of jamming during mechanism operation.

[0056] In this embodiment, the elastic element is a spring 25.

[0057] In this embodiment, the retaining ring 26 is a cylindrical steel ring. A flange may be provided at the end of the cylindrical steel ring near the spring 25, so that the flange near the spring 25 can support the spring 25, and the flange near the core drill 29 can support the core drill 29, so that the movement of the core drill 29 in the direction of compressing the spring 25 can drive the retaining ring 26 in the direction of the spring 25, thereby exiting the soft bag 31.

[0058] During normal drilling, the structure rotates under the drive of the external drive unit to drill into the ground. When drilling ends, the motor 8 starts, driving the bidirectional lead screw to rotate via the reducer 9. At this time, the center drill 28 moves towards the retaining ring 26 and eventually abuts against the inner wall of the flange of the retaining ring 26. The pusher 15 moves a certain distance, and the motor 8 stops. After drilling continues, the sample enters the retaining ring 26. The motor 8 continues to run, and the bidirectional lead screw continues to rotate, causing the center drill 28 to continue moving and driving the retaining ring 26 towards the compression spring 25. At this time, the retaining ring 26 will detach from the soft bag 31. At the same time, the pusher 15 will drive the thrust ball bearing 16 and the spool 17 to move downwards simultaneously, so that the spool extension rod 22 is inserted into the slot 21 and the spool 17 engages with the spline 19. At this time, the disc spring 18 will be compressed by the spool 17. As the double-acting screw continues to rotate, the spool 17 will rotate together with the spline 19 and the double-acting screw, so that the rope 30 is wound on the spool 17. The other end of the rope 30 will tighten the opening of the soft bag 31, thereby sealing the sample that has entered the soft bag 31 inside the soft bag 31.

[0059] When the sample is to be removed, the reverse-rotating motor 8, the center drill 28, and the pusher 15 will move in the opposite direction to reset. The thrust ball bearing 16 and the spool 17 will reset under the rebound of the disc spring 18, and the retaining ring 26 will reset under the action of the spring 25. During the reset process, before the spool 17 and the spline separate, it will rotate to release the rope 30. As the sample's gravity and the rope 30 are gradually released, the opening of the soft bag 31 is gradually opened, and the sample is removed from the mechanism. During the reset process of the retaining ring 26, the opening of the soft bag 31 continues to be opened, so that the rope 30 is finally completely reset.

[0060] Throughout the process, the sample first comes into contact with the baffle ring 26 during the sampling stage. Since the baffle ring 26 is made of steel and has a smooth interior, it will not cause a rubbing effect on the sample, thus preventing the sample from being damaged. During the sample withdrawal stage, the baffle ring 26 will play an auxiliary role in pushing the sample, making the sample withdraw smoothly.

[0061] The sensors, controllers, and control programs mentioned above are all existing technologies and will not be elaborated here.

[0062] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A soft-bag adaptive coring mechanism for Mars profile sampling, characterized in that, include: The outer shell is hollow, and an electric drive assembly (1) is installed at one end of the interior. A driving component (10) is sleeved inside the housing, and a limiting component is provided in the middle of the driving component (10); The pusher (15) is slidably disposed between the electronically controlled transmission assembly (1) and the limiting assembly, and the pusher (15) is connected to the drive assembly (10); A center drill (28) is slidably disposed inside the housing at one end away from the electronically controlled transmission assembly (1). The center drill (28) is connected to a drive member (10), which is used to drive the push member (15) and the center drill (28) to slide. The soft bag (31) is hollow in shape and its outer wall is coupled to the inner wall of the outer shell; A stop ring (26) is slidably disposed between the limiting component and the center drill (28), and an elastic element is provided between the stop ring (26) and the limiting component; The rope assembly has one end threaded into the opening of the soft bag (31) near the central drill (28), and the other end positioned between the pusher (15) and the limiting assembly; and The pull cord control assembly (2) is slidably connected between the pusher (15) and the limiting assembly. In the sampling state, the center drill (28) is set inside the guard ring (26) and one end of the guard ring (26) is inserted into the soft bag (31). In the sealing process, the center drill (28) drives the guard ring (26) to exit the soft bag (31) and compress the elastic element. The pull cord control assembly (2) is used to couple with the other end of the cord assembly and the limiting assembly simultaneously under the push of the pusher (15). The pull cord control assembly (2) rotates with the drive (10) and pulls the cord assembly to tighten the opening of the soft bag (31).

2. The soft-bag adaptive coring mechanism for Mars profile sampling according to claim 1, characterized in that: The outer wall of the outer shell is provided with a first rope inlet (32) and a second rope inlet (33) spaced apart along the axial direction. The first rope inlet (32) and the second rope inlet (33) are connected by a rope groove (34). The rope groove (34) is provided on the outer wall of the outer shell. One end of the rope assembly passes through the first rope inlet (32), and the other end passes through the second rope inlet (33) and is connected to the soft bag (31). The middle section is provided in the rope groove (34).

3. The soft-bag adaptive coring mechanism for Mars profile sampling according to claim 1, characterized in that: The electric control transmission assembly (1) includes a motor (8), a reducer (9) and a motor bracket (11). The motor (8) is connected to the inner wall of the housing through the motor bracket (11). The output end of the motor (8) is connected to the drive unit (10) through the reducer (9).

4. The soft-bag adaptive coring mechanism for Mars profile sampling according to claim 3, characterized in that: The drive component (10) is a bidirectional lead screw, and the pusher (15) and the center drill (28) are both threadedly connected to the bidirectional lead screw.

5. A soft-bag adaptive coring mechanism for Mars profile sampling according to claim 4, characterized in that: The limiting component is a spline (19).

6. A soft-bag adaptive coring mechanism for Mars profile sampling according to claim 5, characterized in that: The pull rope control assembly (2) includes a thrust ball bearing (16), a spool (17) and a disc spring (18) arranged sequentially from the proximal end to the distal end of the pusher (15). The thrust ball bearing (16) and the spool (17) are slidably connected to the outer shell. The disc spring (18) is sleeved on the limiting assembly and its length in the relaxed state is greater than or equal to the axial length of the limiting assembly. A spool extension rod (22) is provided on the spool (17).

7. A soft-bag adaptive coring mechanism for Mars profile sampling according to claim 6, characterized in that: The rope assembly includes a base (20), a slot (21), and a rope (30). The base (20) is provided with a slot (21). One end of the rope (30) enters the outer casing through the first rope inlet (32) and is connected to the base (20). When the spool extension rod (22) is inserted into the slot (21), the disc spring (18) is compressed by the spool (17). The other end of the rope (30) is connected to the opening of the soft bag (31).

8. A soft-bag adaptive coring mechanism for Mars profile sampling according to any one of claims 1-7, characterized in that: A sealing ring (27) is provided between the guard ring (26) and the center drill (28).

9. A soft-bag adaptive coring mechanism for Mars profile sampling according to claim 8, characterized in that: The elastic element is a spring (25).

10. A soft-bag adaptive coring mechanism for Mars profile sampling according to claim 8, characterized in that: The guard ring (26) is a cylindrical steel ring.

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