Opening and closing mechanism of spark sampling sealing and packaging device and use method of opening and closing mechanism

Abstract

The invention discloses an opening and closing mechanism of a spark sampling sealing and packaging device and a using method of the opening and closing mechanism. The opening and closing mechanism comprises a driving motor, a planetary reducer, an internal and external double-thread lead screw pair, a shell limiting assembly, a cover body, a funnel, a connecting rod, a charging tank body and a dust cover. The driving motor drives an internal and external double-thread lead screw pair composed of a screw, an internal and external double-thread nut and a guide column through a speed reducer. The inner lead screw pair is self-locked at a small lead, so that linear lifting is realized; the outer lead screw pair is ultra-large in lead and is not self-locked, and 155-degree rotation switching is achieved. The guide column moves in the sliding groove of the shell through the sliding bearing, and the cover body and the funnel are symmetrically installed at the two ends of the connecting rod. The periphery of the whole mechanism is wrapped by a dustproof cover to form a dustproof mechanism. By controlling the motor to rotate forwards and backwards, the mechanism can automatically complete the complete packaging process of cover body extraction, funnel buckling, funnel lifting and cover body buckling in sequence. The device is high in integration level, reliable in action, high in dustproof capacity and suitable for sampling tasks in severe environments such as Mars.

Description

TECHNICAL FIELD

[0001] The application relates to a Mars sampling sealed packaging device opening and closing mechanism and a use method thereof, and belongs to the technical field of deep space exploration. BACKGROUND

[0002] The Mars surface environment is full of fine dust, and the air pressure is low and the temperature difference is large. In this environment, automatic packaging of samples requires that the mechanism must have very high reliability, sealing performance and dustproof capability. The existing packaging mechanism mostly uses multiple drives to control the cover and the funnel, resulting in a complex system, large weight and low reliability. Although there is a scheme using a single drive source, it is still a technical difficulty to realize precise linear and rotary compound motion in a compact space and effectively resist the long-term erosion of Mars dust. Once the dust invades the precision motion pair (such as a lead screw and a bearing), the mechanism is prone to jamming, wear and even failure, which directly threatens the success of the mission.

[0003] Therefore, it is an urgent problem to design a Mars sampling sealed packaging device opening and closing mechanism driven by a single motor, capable of sequentially completing multiple actions, and having all-round dustproof measures. SUMMARY

[0004] The application aims to provide a Mars sampling sealed packaging device opening and closing mechanism and a use method thereof. The mechanism has the characteristics of compact structure, reliable action sequence, self-locking sealing capability and external dustproof cover protection.

[0005] The technical scheme of the application is a Mars sampling sealed packaging device opening and closing mechanism, which comprises a driving motor, the driving motor is connected with a planetary reducer, the planetary reducer is fixed at the bottom of a shell limiting assembly, an inner and outer double-threaded lead screw pair passes through the shell limiting assembly, the two ends of the inner and outer double-threaded lead screw pair are connected with the output end of the planetary reducer and a connecting rod respectively, the connecting rod is connected with a cover and a loading funnel at the two ends respectively, the back of the shell limiting assembly is connected with a loading tank body, a sliding bearing is arranged on the outer periphery of the inner and outer double-threaded lead screw pair, the sliding bearing is clamped into a sliding groove on the shell limiting assembly, the sliding groove comprises two vertical sliding grooves, the top and upper end of the two vertical sliding grooves are connected by a circumferential sliding groove respectively, and three sets of one-way valve assemblies are arranged at the interface positions between the vertical sliding grooves and the circumferential sliding grooves.

[0006] In the foregoing Mars sampling sealed packaging device opening and closing mechanism, the inner and outer double-threaded lead screw pair comprises a screw rod, an inner and outer double-threaded nut and a guide column, the output end of the planetary reducer is connected with the bottom of the screw rod, the inner and outer double-threaded nut is threadedly sleeved on the screw rod, the guide column is threadedly sleeved on the inner and outer double-threaded nut, and the top head end of the guide column is connected with the connecting rod after passing through the shell limiting assembly.

[0007] The aforementioned opening and closing mechanism of the Mars sampling sealed packaging device is characterized in that the housing limiting assembly is composed of a housing and three groups of one-way valve assemblies, the housing is provided with two vertical sliding grooves, the top and upper end of the two vertical sliding grooves are connected through a circumferential sliding groove, the first group of one-way valve assemblies in the three groups of one-way valve assemblies is arranged in the first circumferential sliding groove at the interface between the second vertical sliding groove and the first circumferential sliding groove; the second group of one-way valve assemblies is arranged in the second vertical sliding groove at the interface between the second vertical sliding groove and the second circumferential sliding groove, and the third group of one-way valve assemblies is arranged in the first vertical sliding groove at the interface between the first vertical sliding groove and the first circumferential sliding groove, the first group of one-way valve assemblies is a structure that is cut off in the direction of the first vertical sliding groove and penetrates in the direction of the second vertical sliding groove; the second group of one-way valve assemblies is a structure that is cut off downward and penetrates upward; and the third group of one-way valve assemblies is a structure that is cut off upward and penetrates downward.

[0008] The aforementioned opening and closing mechanism of the Mars sampling sealed packaging device is characterized in that the housing is further fixed with a dust cover, and the dust cover covers all the sliding grooves and one-way valve assemblies on the housing.

[0009] The aforementioned opening and closing mechanism of the Mars sampling sealed packaging device is characterized in that the dust cover is fixed on the housing through a dust cover pressing plate I, a dust cover pressing plate II, a dust cover pressing plate III and a dust cover pressing plate IV.

[0010] The aforementioned opening and closing mechanism of the Mars sampling sealed packaging device is characterized in that the sliding bearing is made of self-lubricating material and is fixed on the inner and outer double-threaded screw pair through a bearing pressing screw.

[0011] The aforementioned opening and closing mechanism of the Mars sampling sealed packaging device is characterized in that the outer thread of the screw rod and the inner thread of the inner and outer double-threaded nut constitute an inner screw pair, the outer thread of the inner and outer double-threaded nut and the inner thread of the guide column constitute an outer screw pair, the lead of the inner screw pair is ≤3mm, and the lead of the outer screw pair is ≥30mm.

[0012] The aforementioned opening and closing mechanism of the Mars sampling sealed packaging device is characterized in that the one-way valve assembly comprises a housing one-way valve, a one-way valve shaft, a double-arm torsion spring and a locking nut; the one-way valve shaft passes through the mounting seat of the housing limiting assembly, the two arms of the double-arm torsion spring and the mounting hole of the housing one-way valve in sequence, and is fixed through the locking nut, so that the housing one-way valve is always closed under the action of the double-arm torsion spring.

[0013] The aforementioned opening and closing mechanism of the Mars sampling sealed packaging device is characterized in that a plurality of limiting blocks are arranged on the inner and outer double-threaded nut, and the limiting blocks are clamped into the guide grooves on the inner wall of the housing limiting assembly.

[0014] A use method of the aforementioned opening and closing mechanism of the Mars sampling sealed packaging device,

[0015] The initial state is that the cover is buckled on the charging tank body and is in a sealed state, and at this time the sliding bearing is located at the bottom of the first vertical sliding groove.

[0016] Lid lifting and rotation: The drive motor rotates forward, driving the screw to rotate via the planetary reducer, thereby driving the inner and outer double threaded nuts to move the guide column and connecting rod as a whole upward in a straight line along the first vertical slide groove. When the sliding bearing contacts the third set of one-way valve assemblies, it cannot move upward. The sliding bearing enters the first circumferential slide groove, and after knocking open the first set of one-way valve assemblies, it enters the second vertical slide groove, completing the lifting of the lid and rotating the loading funnel to directly above the loading tank.

[0017] The loading funnel engages: the drive motor reverses, and the sliding bearing is blocked by the first set of one-way valve components, so it can only move down the second vertical slide to the bottom and complete the loading funnel engagement action.

[0018] Lifting the loading funnel: After the sample is received, the drive motor rotates forward, and the sliding bearing moves upward along the second vertical slide groove, knocking open the second set of one-way valve components. After moving to the top of the vertical slide groove, it stops, completing the lifting of the loading funnel.

[0019] Cover locking: The drive motor reverses, and the sliding bearing, blocked by the second set of one-way valve assemblies, enters the first vertical slide groove through the second circumferential slide groove, causing the cover to rotate to the top of the filling tank. The sliding bearing moves downward in the first vertical slide groove, knocks open the third set of one-way valve assemblies, and moves to its bottom, finally pressing the cover tightly onto the filling tank to complete the seal.

[0020] The beneficial effects of the present invention are as follows: Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. Highly integrated functions and precise movements: Through a single drive system and a unique "double-threaded lead screw pair" design, utilizing the difference in thread lead and self-locking characteristics, the complex sequence of movements—raising, lowering, and 155° position transitions—of the cover and funnel is achieved. Three sets of one-way valves, combining small size with multiple functions, provide crucial mechanical limits and position feedback.

[0022] 2. Compact structure and light weight: The drive, transmission, execution and protection functions are highly integrated into a compact unit, making it ideal for deployment on Mars rovers where space and weight are extremely precious.

[0023] 3. Reliable self-locking and good sealing performance: The self-locking characteristic of the internal screw pair ensures that the clamping force of the cover will not loosen in the sealed state, thus guaranteeing the long-term sealing integrity of the sample. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a three-dimensional structural diagram of the present invention without a dust cover;

[0026] Figure 3 for Figure 2 A schematic diagram of a partial structure;

[0027] Figure 4 This is a front view of the present invention;

[0028] Figure 5 This is a cross-sectional schematic diagram of the present invention;

[0029] Figure 6 This is a rear view of the present invention;

[0030] Figure 7 This is a schematic diagram of the housing limiting assembly of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal and external double-threaded lead screw pair of the present invention;

[0032] Figure 9 This is a partial enlarged view of the one-way valve assembly;

[0033] Figure 10 This is a flowchart illustrating the four working states of the present invention (lid extraction, funnel closing, funnel lifting, and lid closing).

[0034] Reference numerals: 1-Drive motor, 2-Planetary reducer, 3-Double-threaded lead screw pair, 31-Screw, 32-Double-threaded nut, 32-1-Limit block, 33-Guide post, 4-Sliding bearing, 5-Bearing clamping screw, 6-Housing limit assembly, 61-Housing, 62-One-way valve assembly (62a-First group of one-way valve assembly, 62b-Second group of one-way valve assembly, 62c-Third group of one-way valve assembly), 62-1-Housing one-way valve, 62-2-Single 62-3-Double-arm torsion spring, 62-4-Locking nut, 7-Cover body, 8-Filling funnel, 9-Connecting rod, 10-Filling tank body, 11-Dust cover, 12-Dust cover pressure plate I, 13-Dust cover pressure plate II, 14-Dust cover pressure plate III, 15-Dust cover pressure plate IV, 16-Vertical slide groove (16a-First vertical slide groove, 16b-Second vertical slide groove), 17-Circumferential slide groove (17a-First circumferential slide groove, 17b-Second circumferential slide groove). Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0036] An embodiment of the present invention: an opening and closing mechanism for a Mars sampling sealing and packaging device, comprising a drive motor 1, the output end of which is connected to the input end of a planetary reducer 2. The drive motor 1 may be a low-temperature resistant brushless DC motor. The planetary reducer 2 may be a high-precision planetary gear system. The planetary reducer 2 is fixed to the bottom of the housing limiting assembly 6. An inner and outer double threaded screw pair 3 passes through the housing limiting assembly 6. The two ends of the inner and outer double threaded screw pair 3 are respectively connected to the output end of the planetary reducer 2 and the connecting rod 9. The two ends of the connecting rod 9 are respectively connected to a cover 7 and a loading funnel 8, and the cover 7 and the loading funnel 8 are arranged at a certain angle relative to the central axis of the connecting rod 9. In this embodiment, a 155° arrangement is used for description. The back of the housing limiting assembly 6 is connected to the loading tank 10. A sliding bearing 4 is provided on the outer periphery of the double-threaded screw pair 3. The sliding bearing 4 is inserted into the sliding groove on the housing limiting assembly 6. The sliding groove includes two vertical sliding grooves 16. The top and upper end of the two vertical sliding grooves 16 are connected by a circumferential sliding groove 17. Three sets of one-way valve assemblies 62 are set at the interface between the vertical sliding grooves 16 and the circumferential sliding grooves 17.

[0037] The internal and external double-threaded screw pair 3 includes a screw 31, an internal and external double-threaded nut 32, and a guide post 33. The output end of the planetary reducer 2 is connected to the bottom of the screw 31. The internal and external double-threaded nut 32 is threaded onto the screw 31, and the guide post 33 is threaded onto the internal and external double-threaded nut 32. The top end of the guide post 33 passes through the housing limiting assembly 6 and is connected to the connecting rod 9. The external thread of the screw 31 and the internal thread of the internal and external double-threaded nut 32 form an internal screw pair, and the external thread of the internal and external double-threaded nut 32 and the internal thread of the guide post 33 form an external screw pair. The lead of the internal screw pair is ≤3mm and has a self-locking function; the lead of the external screw pair is ≥30mm and does not have a self-locking capability.

[0038] The housing limiting assembly 6 consists of a housing 61 and three sets of one-way valve assemblies 62. The housing 61 has two vertical sliding grooves 16, spaced at a certain angle. The angle between the two vertical sliding grooves 16 is the same as the angle between the cover 7 and the loading funnel 8. The top and upper ends of the two vertical sliding grooves 16 are connected by a circumferential sliding groove 17. The first set of one-way valve assemblies 62a is located in the first circumferential sliding groove 17a at the interface between the second vertical sliding groove 16b and the first circumferential sliding groove 17a; the second set of one-way valve assemblies... 62b is disposed in the second vertical slide groove 16b at the interface of the second vertical slide groove 16b and the second circumferential slide groove 17b, and the third set of one-way valve assembly 62c is disposed in the first vertical slide groove 16a at the interface of the first vertical slide groove 16a and the first circumferential slide groove 17a. The first set of one-way valve assembly 62a is a structure that cuts off in the direction of the first vertical slide groove 16a and passes through in the direction of the second vertical slide groove 16b; the second set of one-way valve assembly 62b is a structure that cuts off downward and passes through upward; the third set of one-way valve assembly 62c is a structure that cuts off upward and passes through downward.

[0039] In this structure, the first set of one-way valves 62a is used to radially limit the connecting rod 9 during the lifting of the loading funnel 8, so as to ensure the stability of the movement.

[0040] The second set of one-way valves 62b: provides precise axial positioning when the guide post 33 rotates to reset the cover 7 above the filling tank 10 after the filling funnel 8 is lifted.

[0041] The third set of one-way valves 62c: provides precise axial positioning when the guide post 33 rotates to engage the filling funnel 8 after the cover 7 is lifted.

[0042] A dust cover 11 made of flexible, lightweight material is also fixed to the housing 6. The dust cover 11 is fastened to the periphery 6 of the housing limiting assembly by dust cover pressure plates I 12, II 13, III 14, and IV 15 and screws, forming the main protective barrier. The dust cover 11 covers all the sliding grooves and one-way valve assembly 62 on the housing 6, forming a sealed space that encloses the entire moving mechanism, fundamentally preventing the intrusion of spark dust.

[0043] The sliding bearing 4 is made of PEEK-based self-lubricating material and is fixed to the guide post 33 by the bearing clamping screw 5, which axially fixes the sliding bearing 4 and prevents it from coming off the guide post 33. The housing 61 is provided with a sliding groove (vertical sliding groove 16 and circumferential sliding groove 17) that is adapted to the sliding bearing 4. The sliding bearing 4 is constrained in the sliding groove, so that the sliding bearing 4 can slide axially or rotate circumferentially along the sliding groove.

[0044] The one-way valve assembly 62 includes a housing one-way valve 62-1, a one-way valve shaft 62-2, a double-arm torsion spring 62-3, and a locking nut 62-4. The one-way valve shaft 62-2 passes sequentially through the mounting base of the housing 61, the two arms of the double-arm torsion spring 62-3, and the mounting hole of the housing one-way valve 62-1, and is fixed by the locking nut 62-4. A limiting shaft extends outward from each side of the middle of the one-way valve 62-1. When the limiting shaft is just supported on the top surface of the slide groove, the lower main structure of the one-way valve 62-1 extends vertically into the slide groove, thereby isolating the slide groove. The housing one-way valve 62-1 is normally closed under the action of the double-arm torsion spring 62-3, providing a mechanical limiting function through this structure.

[0045] The double-threaded nut 32 is provided with multiple limiting blocks 32-1, which are engaged in the guide grooves on the inner wall of the housing limiting assembly 6. This ensures that the double-threaded nut 32 can only move up and down in a straight line along the guide groove.

[0046] A method for using the opening and closing mechanism of a Mars sampling sealing and encapsulation device specifically includes the following operational processes:

[0047] Initial state: The cover 7 is fastened to the filling tank 10 and is in a sealed state. At this time, the sliding bearing 4 is located at the bottom of the first vertical slide groove 16a.

[0048] The cover 7 is lifted and rotated: The drive motor 1 rotates forward, and the screw 31 is driven to rotate through the planetary reducer 2, thereby driving the inner and outer double threaded nuts 32 to drive the guide column 33 and the connecting rod 9 to move upward in a straight line along the first vertical slide groove 16a. When the sliding bearing 4 contacts the third set of one-way valve assembly 62c, since the third set of one-way valve assembly 62c can only be opened from top to bottom, the sliding bearing 4 is blocked by the third set of one-way valve assembly 62c and cannot move upward. At this time, the outer screw pair drives the guide column 33 to rotate 155°, so that the sliding bearing 4 enters the first circumferential slide groove 17a, and after opening the first set of one-way valve assembly 62a, it enters the second vertical slide groove 16b, and continues to move upward a short distance in the second vertical slide groove 16b so that the first set of one-way valve assembly 62a can be reset, thus completing the lifting of the cover and rotating the loading funnel 8 to directly above the loading tank 10.

[0049] The loading funnel 8 is engaged: the drive motor 1 reverses and the sliding bearing 4 moves down along the second vertical slide 16b. During the downward movement, it is blocked by the first set of one-way valve assembly 62a and cannot enter the first circumferential slide 17a. It can only move down along the second vertical slide 16b to the bottom and then complete the engagement action of the loading funnel 8.

[0050] Lifting of the loading funnel 8: After the sample is received, the drive motor 1 rotates forward and drives the guide column 33 to rotate in the opposite direction and lift through the external screw pair. The sliding bearing 4 moves upward along the second vertical slide groove 16b, knocks open the second set of one-way valve assembly 62b, and then moves to the top of the vertical slide groove 16b and stops, thus completing the lifting of the loading funnel 8.

[0051] Cover 7 latching: Drive motor 1 reverses, and after sliding bearing 4 is blocked by the second set of one-way valve assembly 62b, the external screw drive guide column 33 rotates 155° and enters the first vertical slide groove 16a through the second circumferential slide groove 17b, so that cover 7 rotates to be directly above the filling tank 10. Sliding bearing 4 moves downward in the first vertical slide groove 16a, knocks open the third set of one-way valve assembly 62c and moves to its bottom, finally pressing cover 7 tightly onto the filling tank 10 to complete the seal.

[0052] Throughout the process, the drive motor 1 operates in a "forward-reverse-forward-reverse" sequence, and the mechanism sequentially completes four actions: lifting and rotating the cover 7, closing the loading funnel 8, lifting the loading funnel 8, and closing the cover 7. The entire process is carried out under the protection of the dust cover 11. Each one-way valve assembly 62 briefly opens and provides a limit when the connecting rod 11 passes through, and closes immediately after passing through, effectively maintaining the cleanliness of the inside of the housing 61.

[0053] This invention is an integrated mechanism for use in Mars sample return missions, which enables automatic opening and closing of the sealing cover 7 of the loading tank 10 and precise conversion of the loading funnel 8, and has multiple dustproof functions.

Claims

1. An opening and closing mechanism for a Mars sampling sealing and encapsulation device, characterized in that: The device includes a drive motor (1), which is connected to a planetary reducer (2). The planetary reducer (2) is fixed at the bottom of the housing limiting assembly (6). The inner and outer double threaded screw pair (3) passes through the housing limiting assembly (6). The two ends of the inner and outer double threaded screw pair (3) are respectively connected to the output end of the planetary reducer (2) and the connecting rod (9). The two ends of the connecting rod (9) are respectively connected to the cover (7) and the loading funnel (8). The back of the housing limiting assembly (6) is connected to the loading tank (10). The outer periphery of the inner and outer double threaded screw pair (3) is provided with a sliding bearing (4). The sliding bearing (4) is inserted into the sliding groove on the housing limiting assembly (6). The sliding groove includes two vertical sliding grooves (16). The top and upper end of the two vertical sliding grooves (16) are connected by a circumferential sliding groove (17). Three sets of one-way valve assemblies (62) are set at the interface between the vertical sliding grooves (16) and the circumferential sliding grooves (17).

2. The opening and closing mechanism of the Mars sampling sealing and encapsulation device according to claim 1, characterized in that: The internal and external double threaded screw pair (3) includes a screw (31), an internal and external double threaded nut (32), and a guide post (33). The output end of the planetary reducer (2) is connected to the bottom of the screw (31). The internal and external double threaded nut (32) is threaded on the screw (31), and the guide post (33) is threaded on the internal and external double threaded nut (32). The top end of the guide post (33) is connected to the connecting rod (9) after passing through the housing limiting assembly (6).

3. The opening and closing mechanism of the Mars sampling sealing and encapsulation device according to claim 1, characterized in that: The housing limiting assembly (6) consists of a housing (61) and three sets of one-way valve assemblies (62). The housing (61) is provided with two vertical slide grooves (16), and the top and upper end of the two vertical slide grooves (16) are connected by a circumferential slide groove (17). The first set of one-way valve assemblies (62a) of the three sets of one-way valve assemblies (62) is located in the first circumferential slide groove (17a) at the interface between the second vertical slide groove (16b) and the first circumferential slide groove (17a); the second set of one-way valve assemblies (62b) is located in the interface between the second vertical slide groove (16b) and the second circumferential slide groove (17a). In the second vertical groove (16b) at the interface of the circumferential groove (17b), the third set of one-way valve assemblies (62c) is set in the first vertical groove (16a) at the interface of the first vertical groove (16a) and the first circumferential groove (17a). The first set of one-way valve assemblies (62a) is a structure that cuts off in the direction of the first vertical groove (16a) and passes through in the direction of the second vertical groove (16b); the second set of one-way valve assemblies (62b) is a structure that cuts off downward and passes through upward; the third set of one-way valve assemblies (62c) is a structure that cuts off upward and passes through downward.

4. The opening and closing mechanism of the Mars sampling sealing and encapsulation device according to claim 1, characterized in that: A dust cover (11) is also fixed on the housing (6), which covers all the grooves and one-way valve assembly (62) on the housing (6).

5. The opening and closing mechanism of the Mars sampling sealing and encapsulation device according to claim 4, characterized in that: The dust cover (11) is fixed to the housing (61) by dust cover pressure plate I (12), dust cover pressure plate II (13), dust cover pressure plate III (14) and dust cover pressure plate IV (15).

6. The opening and closing mechanism of the Mars sampling sealing and encapsulation device according to claim 1, characterized in that: The sliding bearing (4) is made of self-lubricating material and is fixed to the inner and outer double threaded lead screw pair (3) by bearing clamping screw (5).

7. The opening and closing mechanism of the Mars sampling sealing and encapsulation device according to claim 2, characterized in that: The external thread of the screw (31) and the internal thread of the double-threaded nut (32) form an internal screw pair, and the external thread of the double-threaded nut (32) and the internal thread of the guide post (33) form an external screw pair. The lead of the internal screw pair is ≤3mm, and the lead of the external screw pair is ≥30mm.

8. The opening and closing mechanism of the Mars sampling sealing and encapsulation device according to claim 1, characterized in that: The one-way valve assembly (62) includes a housing one-way valve (62-1), a one-way valve shaft (62-2), a double-arm torsion spring (62-3), and a locking nut (62-4). The one-way valve shaft (62-2) passes sequentially through the mounting seat of the housing limiting assembly (6), the two arms of the double-arm torsion spring (62-3), and the mounting hole of the housing one-way valve (62-1), and is fixed by the locking nut (62-4), so that the housing one-way valve (62-1) is normally closed under the action of the double-arm torsion spring (62-3).

9. The opening and closing mechanism of a Mars sampling sealing and encapsulation device according to claim 2, characterized in that: The inner and outer double threaded nut (32) is provided with multiple limiting blocks (32-1), which are inserted into the guide groove on the inner wall of the housing limiting assembly (6).

10. A method of using the opening and closing mechanism of the Mars sampling sealing and encapsulation device as described in any one of claims 1-9, characterized in that: Initial state: The cover (7) is fastened to the filling tank (10) and is in a sealed state. At this time, the sliding bearing (4) is located at the bottom of the first vertical slide groove (16a); Lid lifting and rotation: The drive motor (1) rotates forward, and the screw (31) is driven to rotate through the planetary reducer (2), thereby driving the inner and outer double threaded nuts (32) to drive the guide column (33) and connecting rod (9) to move upward in a straight line along the first vertical slide groove (16a). When the sliding bearing (4) comes into contact with the third set of one-way valve assembly (62c), it cannot move upward. The sliding bearing (4) enters the first circumferential slide groove (17a), and after knocking open the first set of one-way valve assembly (62a), it enters the second vertical slide groove (16b), completing the lifting of the lid and rotating the loading funnel (8) to the top of the loading tank (10). The loading funnel is engaged: the drive motor (1) reverses, and the sliding bearing (4) is blocked by the first set of one-way valve assembly (62a) and can only run down along the second vertical slide (16b) to the bottom to complete the engagement of the loading funnel (8); Lifting of the loading funnel: After the sample is received, the drive motor (1) rotates forward, and the sliding bearing (4) moves upward along the second vertical slide (16b) to knock open the second set of one-way valve assembly (62b) and then moves to the top of the vertical slide (16b) and stops, thus completing the lifting of the loading funnel (8); Cover snapping: The drive motor (1) reverses, and the sliding bearing (4) is blocked by the second set of one-way valve assembly (62b) and enters the first vertical slide groove (16a) through the second circumferential slide groove (17b), so that the cover (7) rotates to the top of the filling tank (10). The sliding bearing (4) moves downward in the first vertical slide groove (16a), knocks open the third set of one-way valve assembly (62c) and moves to its bottom, finally pressing the cover (7) onto the filling tank (10) to complete the seal.

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