A primary encapsulation device for small celestial body surface sampling

Abstract

The present invention provides a primary encapsulation device for small celestial body surface sampling, which includes a driving assembly, an upper housing, a lower housing, a container cavity and an encapsulation assembly. The upper housing is connected to the container cavity through the lower housing, and the driving assembly is fixedly installed on a driving mounting plate; the encapsulation assembly is arranged in the container cavity, and the encapsulation assembly includes a first driven gear assembly and a second driven gear assembly. The first driven gear body of the first driven gear assembly meshes with the first driving gear of the driving assembly, and the second driven gear body of the second driven gear assembly meshes with the second driving gear of the driving assembly; the inner ring of the first driven gear body is fixedly connected to the first step of the lower housing; the inner ring of the second driven gear body is fixedly connected to the container cavity; a top cover is provided at the top of the container cavity. The present invention relies on motor drive to achieve three states of sample collection, encapsulation and transfer, uses fewer power sources, reduces power consumption, and reliably transfers the sample into the return capsule.

Description

Technical Field

[0001] The present invention belongs to the field of space deep exploration, and particularly relates to a primary encapsulation device for sampling on the surface of small celestial bodies. Background Art

[0002] With the continuous expansion of the scope and scale of human space exploration, human activities are no longer limited to the Earth and near-Earth space, but have turned their attention to more distant deep space. On this basis, since small celestial bodies contain a large amount of information on the formation and evolution of the solar system and rich minerals, they have extremely high scientific and economic value. Effective exploration of small celestial bodies can develop and utilize small celestial body resources. There are many ways to explore small celestial bodies, and sample collection is one of the important exploration methods. NASA, ESA, and JAXA have all conducted sample collection and exploration on small celestial bodies. Currently, only Japan's "Hayabusa" 1 has successfully achieved contact with a small celestial body and sample return. It used the "Touch-and-Go" (TAG) method to achieve sample return from the Itokawa asteroid. That is, after contacting the surface of the asteroid, a metal bullet was launched to impact the surface of the asteroid to splash up fragments and dust, and the splashed fragments were collected through the hood-shaped structure at the end of the sampling device. It formed a closed channel with the sample canister to ensure that part of the sample entered the sample canister to complete the collection. However, due to the relatively long size of the hood-shaped structure, the fragments collided repeatedly in the channel after being splashed up, resulting in energy attenuation, and finally the amount of samples collected in the mission was extremely small.

[0003] Patent CN106198094 introduced a primary encapsulation device for lunar surface sampling. The device consists of a main body, a sample container, a sample discharge funnel, a container lid encapsulation assembly, a driving mechanism, and a container lid. The device can realize the spatial position switching between the container lid of the lunar soil sample and the sample discharge funnel to achieve the storage and automatic encapsulation of the lunar soil sample. Patent CN201310520682.4 introduced a multifunctional lunar surface sample collection and encapsulation device, which consists of a motor, a sampling device, and an encapsulation assembly. It transports lunar soil through a screw and seals the sample by means of a soft bag drawstring. The devices introduced in these two patents cannot realize secondary sample transportation, and the primary encapsulation and the sample container are both integrated structures, which are not suitable for the contact sampling state on the surface of small celestial bodies. Summary of the Invention

[0004] In view of this, the present invention aims to propose a primary encapsulation device for sampling on the surface of small celestial bodies, which can reliably transfer the sample into the primary encapsulation device in the return capsule.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] A primary encapsulation device for sampling on the surface of small celestial bodies, characterized in that it includes a driving component, an upper housing, a lower housing, a container cavity, and an encapsulation component. The upper housing is connected to the container cavity through the lower housing. One side of the upper housing is provided with a driving mounting plate, and the driving component is fixedly mounted on the driving mounting plate;

[0007] The encapsulation component is arranged in the container cavity. The encapsulation component includes a first driven gear component and a second driven gear component. The first driven gear body of the first driven gear component meshes with the first driving gear of the driving component, and the second driven gear body of the second driven gear component meshes with the second driving gear of the driving component. The inner ring of the first driven gear body is fixedly connected to the first step of the lower housing to realize the connection between the first driven gear component and the lower housing. The inner ring of the second driven gear body is fixedly connected to the container cavity to realize the connection between the second driven gear component and the container cavity. The top of the container cavity is provided with a top cover, and the top cover and the container cavity form a sample encapsulation cavity. The top cover and the upper housing and the lower housing form a sample transfer cavity.

[0008] Further, the driving component includes a driving motor, a gear shaft, a first driving gear, a second driving gear, and a safety coupling. The driving motor is arranged on the upper part of the driving mounting plate, the gear shaft is arranged on the lower part of the driving mounting plate. The output end of the driving motor is connected to the gear shaft. The gear shaft is successively provided with a first driving gear, a safety coupling, and a second driving gear from top to bottom. The first driving gear is connected to the outer ring of the mounting coupling, and the inner ring of the safety coupling is connected to the gear shaft through a flat key.

[0009] Further, the first driven gear body and the second driven gear body have the same structure, and angular contact ball bearings are provided on the circumferential inner surfaces of the first driven gear body and the second driven gear body.

[0010] Further, the first driven gear component includes a first driven gear body, a nut seat, and a screw. The nut seat includes a nut mounting ring and a nut body. The circumferential outer surface of the nut body is connected to the circumferential inner surface of the nut mounting ring through a plurality of struts. The nut mounting ring is fixedly mounted on the upper surface of the first driven gear body, and the screw is matched with the nut body.

[0011] Further, guide columns are arranged inside the upper housing. The guide columns are connected to the inner surface of the upper housing through a plurality of struts. Guide grooves with a medium-shaped cross-section are arranged inside the guide columns. A medium-shaped guide piece is provided at the top of the screw, and a conical pressure door is provided at the bottom of the screw. The guide piece is arranged in the guide groove to realize the linear movement of the screw in the vertical direction.

[0012] Further, the second driven gear assembly includes a second driven gear body, a top rotating door, and a bottom rotating door. The angular contact ball bearing on the inner ring of the second driven gear body is sleeved on the upper middle part of the container cavity. The second driven gear body can rotate relative to the container cavity. The top rotating door is fixedly connected to the upper surface of the second driven gear body, and the bottom rotating door is fixedly connected to the lower surface of the second driven gear body. Both the top rotating door and the bottom rotating door can rotate following the second driven gear body.

[0013] Further, a feed channel is provided at the center of the bottom of the container cavity. The feed channel and the container cavity are integrally formed. The feed channel communicates the inside and the outside of the container cavity. Two air inlet pipes for secondary air intake are provided at the bottom of the outer surface of the container cavity. The two air inlet pipes are symmetrically structured about the feed channel at the center.

[0014] Further, the inner diameter of the feed channel is smaller than the diameter of the large round end of the conical pressure door.

[0015] Further, two top cover windows are provided on the surface of the top cover. The two top cover windows are symmetrically structured about the center of the top cover. Two top rotating door windows corresponding to the top cover windows are provided at the top of the top rotating door; One bottom rotating door window is provided on each side of the bottom rotating door. The two bottom rotating door windows are symmetrically structured about the center of the bottom rotating door. Cavity windows corresponding to the two bottom rotating door windows are provided on both sides of the container cavity.

[0016] Further, a filter screen is provided on the cavity window.

[0017] Compared with the prior art, the primary packaging device for small celestial body surface sampling described in the present invention has the following advantages:

[0018] (1) For the primary packaging device for small celestial body surface sampling of the present invention, it adopts the form of a single motor combined with a safety coupling. Relying on the drive of a single motor, different combinations of opening and closing of the conical pressure door, the top rotating door, and the bottom rotating door are realized, achieving three states of sample collection, packaging, and transfer, with fewer power sources and reduced power consumption.

[0019] (2) For the primary packaging device for small celestial body surface sampling of the present invention, the secondary air inlet holes are designed to be tangential air inlets to form a spiral air flow, improving the sample transportation efficiency.

[0020] (3) For the primary packaging device for small celestial body surface sampling of the present invention, the conveying space can accommodate samples with a size of 20 mm, and the sample collection inlet formed between the container cavity and the conical pressure door is in a maze form, ensuring that the sample will not rebound after being blown into the container cavity by the sample delivery air flow and affecting the subsequent sample collection. Description of the Drawings

[0021] The accompanying drawings, which form a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 Schematic diagram of a primary encapsulation device for small celestial body surface sampling according to an embodiment of the present invention;

[0023] Figure 2 Bottom view of a primary encapsulation device for small celestial body surface sampling according to an embodiment of the present invention;

[0024] Figure 3 Cross-sectional view of a primary encapsulation device for small celestial body surface sampling according to an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of a primary encapsulation device for small celestial body surface sampling according to an embodiment of the present invention with the upper housing removed;

[0026] Figure 5 Schematic diagram of the second driven gear assembly according to an embodiment of the present invention;

[0027] Figure 6 Bottom view of the upper housing according to an embodiment of the present invention;

[0028] Figure 7 Schematic diagram of the lower housing according to an embodiment of the present invention;

[0029] Figure 8 Schematic diagram of the container cavity according to an embodiment of the present invention;

[0030] Figure 9 Schematic diagram of the top rotating door according to an embodiment of the present invention;

[0031] Figure 10 Schematic diagram of the bottom rotating door according to an embodiment of the present invention;

[0032] Figure 11 Schematic diagram of the top cover according to an embodiment of the present invention.

[0033] Explanation of reference numerals:

[0034] 1. Driving assembly; 11. Driving motor; 12. Gear shaft; 13. First driving gear; 14. Second driving gear; 15. Safety coupling; 2. Upper housing; 21. Guide post; 22. Guide groove; 3. Lower housing; 4. Container cavity; 41. Feed channel; 42. Cavity window; 43. Inlet pipe; 5. Encapsulation assembly; 6. First driven gear assembly; 61. First driven gear body; 62. Nut seat; 621. Nut mounting ring; 622. Nut body; 63. Screw; 64. Guide piece; 65. Conical pressure door; 7. Second driven gear assembly; 71. Second driven gear body; 72. Top rotating door; 721. Top rotating door window; 73. Bottom rotating door; 731. Bottom rotating door window; 8. Top cover; 81. Top cover window. Detailed implementation manners

[0035] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0038] The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0039] A primary encapsulation device for small celestial body surface sampling, comprising a driving assembly 1, an upper housing 2, a lower housing 3, a container cavity 4 and an encapsulation assembly 5. The upper housing 2 is connected to the container cavity 4 through the lower housing 3. A driving mounting plate is provided on one side of the upper housing 2, and the driving assembly 1 is fixedly mounted on the driving mounting plate;

[0040] The encapsulation assembly 5 is arranged in the container cavity 4. The encapsulation assembly 5 includes a first driven gear assembly 6 and a second driven gear assembly 7. The first driven gear body 61 of the first driven gear assembly 6 meshes with the first driving gear 13 of the driving assembly 1, and the second driven gear body 71 of the second driven gear assembly 7 meshes with the second driving gear 14 of the driving assembly 1. The lower housing 3 is integrally stepped. The top of the lower housing 3 is the first step. The inner ring of the first driven gear body 61 is fixedly connected to the first step of the lower housing 3 to realize the connection between the first driven gear assembly 6 and the lower housing 3. The inner ring of the second driven gear body 71 is fixedly connected to the container cavity 4 to realize the connection between the second driven gear assembly 7 and the container cavity 4. A top cover 8 is provided at the top of the container cavity 4. The top cover 8 and the container cavity 4 form a sample encapsulation cavity. The top cover 8 and the upper housing 2 and the lower housing 3 form a sample transfer cavity.

[0041] The driving assembly 1 includes a driving motor 11, a gear shaft 12, a first driving gear 13, a second driving gear 14 and a safety coupling 15. The driving motor 11 is arranged at the upper part of the driving mounting plate, and the gear shaft 12 is arranged at the lower part of the driving mounting plate. The output end of the driving motor 11 is connected to the gear shaft 12. The gear shaft 12 is successively provided with a first driving gear 13, a safety coupling 15 and a second driving gear 14 from top to bottom. The first driving gear 13 is connected to the outer ring of the mounting coupling. The inner ring of the safety coupling 15 is connected to the gear shaft 12 through a flat key to transmit torque. When the transmitted torque is greater than the slipping torque of the safety coupling 15, slipping starts between its inner ring and outer ring, realizing the rotation of the inner ring and the stop of the outer ring.

[0042] The first driven gear body 61 and the second driven gear body 71 have the same structure. Angular contact ball bearings are provided on the circumferential inner surfaces of the first driven gear body and the second driven gear body 71.

[0043] The first driven gear assembly 6 includes a first driven gear body 61, a nut seat 62 and a screw 63. The nut seat 62 includes a nut mounting ring 621 and a nut body 622. The circumferential outer surface of the nut body 622 is connected to the circumferential inner surface of the nut mounting ring 621 through a plurality of struts. The nut mounting ring 621 is fixedly mounted on the upper surface of the first driven gear body 61, and the screw 63 cooperates with the nut body 622.

[0044] A guide column 21 is provided inside the upper shell 2, and the guide column 21 is connected to the inner surface of the upper shell 2 through a number of pillars. A guide groove 22 with a Chinese-character-shaped cross-section is provided inside the guide column 21; a Chinese-character-shaped guide piece 64 is provided on the top of the screw 63, and a conical pressure door 65 is provided at the bottom of the screw 63. Preferably, a bellows is provided between the conical pressure door 65 and the top cover 8, and the bellows can be extended and retracted following the lifting and lowering of the screw 63 to protect the screw 63 and prevent the sample from entering the screw 63 and affecting the work; and the guide piece 64 is arranged in the guide groove 22 to realize the linear movement of the screw 63 in the vertical direction; at the same time, the Chinese-character-shaped guide piece 64 moves up and down in the guide groove 22, which can also prevent the screw 63 from rotating.

[0045] The No. 2 driven gear assembly 7 includes a No. 2 driven gear body 71, a top rotating door 72, and a bottom rotating door 73. The angular contact ball bearing of the inner ring of the No. 2 driven gear body 71 is sleeved to the middle and upper part of the container cavity 4. The No. 2 driven gear body 71 can rotate relative to the container cavity 4. The top rotating door 72 is fixedly connected to the upper surface of the No. 2 driven gear body 71, and the bottom rotating door 73 is fixedly connected to the lower surface of the No. 2 driven gear body 71, and both the top rotating door 72 and the bottom rotating door 73 can rotate with the No. 2 driven gear body 71.

[0046] A feed channel 41 is provided at the center of the bottom of the container cavity 4. The feed channel 41 and the container cavity 4 are integrally formed. The feed channel 41 connects the inside and the outside of the container cavity 4. Two air inlet pipes 43 for secondary air intake are provided at the bottom of the outer surface of the container cavity 4. The two air inlet pipes 43 are centrally symmetrical with respect to the feed channel 41. The secondary air inlet hole is designed as a tangential air intake to form a spiral airflow, thereby improving the sample transportation efficiency.

[0047] The inner diameter of the feed channel 41 is smaller than the diameter of the large circular end of the conical pressure door 65 , so as to ensure that the conical pressure door 65 can seal the feed channel 41 when in contact with the feed channel 41 .

[0048] Two top cover windows 81 are provided on the surface of the top cover 8, and the two top cover windows 81 are symmetrical relative to the center of the top cover 8. Two top rotating door windows 721 corresponding to the top cover windows 81 are provided on the top of the top rotating door 72; a bottom rotating door window 731 is provided on both sides of the bottom rotating door 73, and the two bottom rotating door windows 731 are symmetrical relative to the center of the bottom rotating door 73. Cavity windows 42 corresponding to the two bottom rotating door windows 731 are provided on both sides of the container cavity 4.

[0049] The cavity window 42 is provided with a filter screen, which is a micro-particle filter screen and is used to remove the sample delivery gas during the sample collection stage and filter the sample in the container cavity 4.

[0050] Labyrinth seals and sealing rings are provided between the container cavity 4 and the bottom rotating door 73, between the top cover 8 and the top rotating door 72, between the lower housing 3 and the top rotating door 72, between the upper housing 2 and the nut seat 62, and between the top cover 8 and the nut seat 62. This can prevent samples from entering the electronic components, causing damage to the components and affecting their use.

[0051] Example 1: Sample collection state,

[0052] Manually open the air pump that delivers gas to the intake pipe 43. The sample enters through the feed channel 41 under gas excitation. Then close the air pump. At this time, the conical pressure door 65 and the feed channel 41 are in a separated state. The sample bounces into the container cavity 4 through the rebound of the conical pressure door 65. The structure of the conical pressure door 65 can effectively bounce the sample. At this time, the position of the top rotating door window 721 of the top rotating door 72 and the top cover window 81 of the top cover 8 are misaligned and in a closed state. The position of the bottom rotating door window 731 of the bottom rotating door 73 corresponds to the cavity window 42 of the container cavity 4 and is in an open state, ensuring that the sample delivery gas can be discharged outside the container cavity 4.

[0053] Example 2: Sample encapsulation state,

[0054] Manually drive the motor 11 to work, driving the first driving gear 13 and the second driving gear 14 to rotate, respectively driving the first driven gear body 61 and the second driven gear body 71 to rotate.

[0055] Respectively, the first driven gear body 61 drives the nut seat 62 to rotate. At this time, the screw 63 makes an axial movement, and finally realizes the movement of the conical pressure door 65. The designed axial movement distance of the conical pressure door 65 is 33 mm, the lead of the screw 63 is 2 mm, and the number of turns of the screw 63 is 16.5 turns. The conical pressure door 65 finally contacts the feed channel 41 to close the feed channel 41.

[0056] Respectively, the second driven gear body 71 drives the top rotating door 72 and the bottom rotating door 73 to rotate. The number of teeth of the first driving gear 13 and the second driving gear 14 are the same, and the number of teeth of the first driven gear body 61 and the second driven gear body 71 are the same, and the number of turns is the same. Therefore, the states of the top rotating door 72 and the bottom rotating door 73 remain unchanged. The top rotating door window 721 of the top rotating door 72 is still in a closed state, and the bottom rotating door window 731 of the bottom rotating door 73 is still in an open state.

[0057] Example 3: Sample transfer state,

[0058] On the basis of the second embodiment, manually control the driving motor 11 to continue driving the first driving gear 13 to rotate. Since the conical pressure door 65 is closed and reaches the limit position, the resistance torque of the first driving gear 13 rises sharply. When it exceeds the slipping torque of the safety coupling 15, the first driving gear 13 stops rotating, but the gear shaft 12 continues to drive the second driving gear 14 to rotate, realizing the continuous rotation of the top rotating door 72 and the bottom rotating door 73. The number of rotation turns is 0.25 turns. After this process ends, the top rotating door window 721 of the top rotating door 72 is in the open state, and the bottom rotating door window 731 of the bottom rotating door 73 is in the closed state. Turn on the air pump, and the gas enters the container cavity 4 through secondary blowing. Under the influence of the spiral air flow, the sample enters the sample transfer cavity through the sample encapsulation cavity and finally enters the return capsule through the discharge channel of the upper housing 2, thus completing the sample transfer;

[0059] Embodiment 4: The device returns to the initial state,

[0060] On the basis of the third embodiment, manually control the driving motor 11 to continue working. The first driving gear 13 stops rotating, and the second driving gear 14 continues to rotate, driving the second driven gear body 71 to rotate, thereby driving the top rotating door 72 and the bottom rotating door 73 to continue rotating. The number of rotation turns is 0.25 turns. After this process ends, the top rotating door window 721 of the top rotating door 72 is in the closed state, and the bottom rotating door window 731 of the bottom rotating door 73 is in the open state. Manually control the driving motor 11 to drive the first driving gear 13 and the second driving gear 14 to rotate in the reverse direction, ensuring that the first driven gear body 61 and the second driven gear body 71 rotate in the reverse direction for 16.5 turns. The conical pressure door 65 rises to the original position, and the states of the top rotating door window 721 of the top rotating door 72 and the bottom rotating door window 731 of the bottom rotating door 73 remain unchanged, and the overall device returns to the initial state.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A primary encapsulation device for small celestial body surface sampling, characterized in that: it includes a driving component, an upper shell, a lower shell, a container cavity and an encapsulation component. The upper shell is connected to the container cavity through the lower shell. A driving mounting plate is provided on one side of the upper shell, and the driving component is fixedly mounted on the driving mounting plate; the encapsulation component is arranged in the container cavity. The encapsulation component includes a first driven gear component and a second driven gear component. The first driven gear body of the first driven gear component meshes with the first driving gear of the driving component, and the second driven gear body of the second driven gear component meshes with the second driving gear of the driving component. The inner ring of the first driven gear body is fixedly connected to the first step of the lower shell to realize the connection between the first driven gear component and the lower shell. The inner ring of the second driven gear body is fixedly connected to the container cavity to realize the connection between the second driven gear component and the container cavity. A top cover is provided at the top of the container cavity, and the top cover and the container cavity form a sample encapsulation cavity. The top cover and the upper shell and the lower shell form a sample transfer cavity; the first driven gear component includes a first driven gear body, a nut seat and a screw rod. The nut seat includes a nut mounting ring and a nut body. The circumferential outer surface of the nut body is connected to the circumferential inner surface of the nut mounting ring through a plurality of struts. The nut mounting ring is fixedly mounted on the upper surface of the first driven gear body, and the screw rod cooperates with the nut body. A conical pressure door is provided at the bottom of the screw rod; the second driven gear component includes a second driven gear body, a top rotating door and a bottom rotating door. The angular contact ball bearing on the inner ring of the second driven gear body is sleeved on the upper middle part of the container cavity. The second driven gear body can rotate relative to the container cavity. The top rotating door is fixedly connected to the upper surface of the second driven gear body, and the bottom rotating door is fixedly connected to the lower surface of the second driven gear body, and both the top rotating door and the bottom rotating door can rotate following the second driven gear body; an outlet channel is provided at the top of the upper shell; a feed channel is provided at the center of the bottom of the container cavity. The feed channel communicates the inside and the outside of the container cavity. Two air inlet pipes for secondary air intake are provided at the bottom of the outer surface of the container cavity; the inner diameter of the feed channel is smaller than the diameter of the large round end of the conical pressure door; two top cover windows are provided on the surface of the top cover, and two top rotating door windows corresponding to the top cover windows are provided on the top of the top rotating door. One bottom rotating door window is provided on each side of the bottom rotating door, and cavity windows corresponding to the two bottom rotating door windows are provided on both sides of the container cavity.

2. The primary encapsulation device for small celestial body surface sampling according to claim 1, characterized in that: the driving component includes a driving motor, a gear shaft, a first driving gear, a second driving gear and a safety coupling. The driving motor is arranged on the upper part of the driving mounting plate, and the gear shaft is arranged on the lower part of the driving mounting plate. The output end of the driving motor is connected to the gear shaft. The gear shaft is successively provided with a first driving gear, a safety coupling and a second driving gear from top to bottom. The first driving gear is connected to the outer ring of the mounting coupling, and the inner ring of the safety coupling is connected to the gear shaft through a flat key.

3. The primary encapsulation device for small celestial body surface sampling according to claim 1, characterized in that: The structures of the first driven gear body and the second driven gear body are the same, and angular contact ball bearings are provided on the circumferential inner surfaces of the first driven gear body and the second driven gear body.

4. A primary encapsulation device for small celestial body surface sampling according to claim 1, characterized in that: A guide post is provided inside the upper shell. The guide post is connected to the inner surface of the upper shell through a number of struts. A guide groove with a middle-shaped cross-section is provided inside the guide post; a middle-shaped guide piece is provided at the top of the screw rod, and the guide piece is arranged in the guide groove to realize the linear movement of the screw rod in the vertical direction.

5. A primary encapsulation device for small celestial body surface sampling according to claim 1, characterized in that: The feed channel and the container cavity are integrally formed, and the two intake pipes are centrosymmetric with respect to the feed channel.

6. A primary encapsulation device for small celestial body surface sampling according to claim 1, characterized in that: The two top cover windows are centrosymmetric with respect to the center of the top cover, and the two bottom turning door windows are centrosymmetric with respect to the center of the bottom turning door.

7. A primary encapsulation device for small celestial body surface sampling according to claim 1, characterized in that: A filter screen is provided on the cavity window.

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