Asteroid sample tube separation force testing device

Abstract

This invention relates to the technical field of spherical soil sample tubes, and more specifically, to a spherical soil sample tube separation force testing device, comprising a support body, an axial force loading testing component, a radial force loading component, and a load-bearing component. The load-bearing component is disposed on the support body and is used to install a funnel assembly and a sample tube that are interlocked. The axial force loading testing component is mounted on the support body and connected to the center of the bottom of the sample tube, and is used to apply an axial pull-out force along the central axis of the sample tube and simultaneously detect the magnitude of the axial pull-out force. The radial force loading component is mounted on the support body and can be connected to the side wall of the sample tube, and is used to apply a radial pull-out force in a direction perpendicular to the central axis of the sample tube. This invention simulates the force conditions when a robotic arm separates the sample tube and the funnel assembly, making the test results more consistent with the actual engineering scenario of spherical soil sampling.

Description

Technical Field

[0001] This invention relates to the technical field of spherical soil sample tubes, and more specifically, to a spherical soil sample tube separation force testing device. Background Technology

[0002] Astrospheric regolith sampling is a core component of extraterrestrial object exploration missions. After sampling, the regolith sample needs to be sealed in a sample tube. The sample tube and the funnel on the sampling mechanism are in a snap-fit ​​connection. Subsequently, a robotic arm clamps the sample tube and separates it from the funnel. This separation step is a crucial prerequisite for the subsequent transfer and recovery of the regolith sample, and its effectiveness directly affects the integrity of the sample. During the actual separation process, the force applied by the robotic arm is a key control element, and the magnitude of the force must be controlled within a precise range: if the force applied by the robotic arm is too small, it will not be able to overcome the snap-fit ​​resistance between the sample tube and the funnel, causing them to fail to separate smoothly and halting the sampling process; if the force applied is too large, it is very easy to cause deformation and damage to the sample tube structure, which will not only cause leakage of the regolith sample but also directly lead to sample tube failure, resulting in irreparable losses to the exploration mission.

[0003] When the robotic arm separates the sample tube from the funnel, the sample tube is not subjected to a force in only one direction, but simultaneously to an axial pull-out force along the axis and a radial pull-out force caused by the robotic arm's gripping structure, posture deviation, and movement. The coupling effect of multiple forces makes the stress state of the sample tube during separation extremely complex. Existing mechanical testing devices for sample tube separation forces mostly focus on verification under single-direction load conditions. They cannot simulate the coupling effect of axial and radial forces during separation, nor can they accurately reproduce the actual stress conditions during sample tube and funnel separation. Therefore, the test results cannot provide a reliable reference for determining the force range applied by the robotic arm during separation, and thus cannot meet the actual needs of the spherical soil sampling project. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies that only apply load in a single direction and are difficult to replicate the actual stress conditions. It provides a star soil sample tube separation force testing device that simulates the stress conditions when a robotic arm separates the sample tube from the funnel assembly, so that the test results are more consistent with the actual engineering scenario of star soil sampling.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A device for testing the separation force of a sample tube is provided, comprising a support body, an axial force loading test component, a radial force loading component, and a load-bearing component. The load-bearing component is disposed on the support body and is used to install a funnel assembly and a sample tube that are interlocked. The axial force loading test component is mounted on the support body and connected to the center of the bottom of the sample tube, and is used to apply an axial pull-out force along the central axis of the sample tube and simultaneously detect the magnitude of the axial pull-out force. The radial force loading component is mounted on the support body and can be connected to the side wall of the sample tube, and is used to apply a radial pull-out force in a direction perpendicular to the central axis of the sample tube.

[0006] The spherical soil sample tube separation force testing device of the present invention uses a support body as the basic load-bearing structure. A sample tube assembly, consisting of a funnel assembly and a sample tube that are interlocked, is placed on the load-bearing assembly. An axial force loading test assembly, installed on the support body and connected to the bottom center of the sample tube, applies an axial pull-out force to the sample tube along the central axis of the sample tube. At the same time, a radial force loading assembly, also installed on the support body and connected to the side wall of the sample tube, applies a radial pull-out force to the sample tube in a direction perpendicular to the central axis of the sample tube. During the separation of the sample tube from the funnel assembly, the magnitude of the axial pull-out force is detected simultaneously. This achieves the simultaneous application of axial pull-out force and radial pull-out force and the accurate detection of axial force during the separation of the sample tube. It can simulate the actual stress state when the sample tube is separated from the funnel assembly and simulate the multi-force coupling stress condition when a robotic arm separates the sample tube from the funnel assembly. This makes the test results more consistent with the actual engineering scenario of spherical soil sampling and provides reliable data support for determining the reasonable force range for robotic arm separation.

[0007] Furthermore, the axial force loading test assembly includes a linear drive module, a tension sensor, and a flexible force transmission rope. The linear drive module moves in a direction parallel to the central axis of the sample tube. The tension sensor is mounted on the linear drive module. One end of the flexible force transmission rope is connected to the tension sensor, and the other end is connected to the center of the bottom of the sample tube. Through the coordinated design of the linear drive module, tension sensor, and flexible force transmission rope, the axial force loading test assembly utilizes the linear drive module, parallel to the central axis of the sample tube, to provide power. The axial force is then precisely transmitted to the center of the bottom of the sample tube via the flexible force transmission rope. Simultaneously, the tension sensor can detect the magnitude of the axial pull-out force, achieving integrated application and detection of axial force. This ensures that the axial pull-out force acts precisely along the central axis of the sample tube, improving the accuracy and synchronization of the axial force test.

[0008] Furthermore, the linear drive module includes a drive motor, a lead screw, a first slider, a second slider, a guide rail, and a mounting plate. The drive motor is connected to the lead screw, the first slider is slidably connected to the lead screw, and the second slider is slidably connected to the guide rail. Both the first and second sliders are fixedly connected to the mounting plate, and the tension sensor is fixed on the mounting plate. The linear drive module adopts a dual-slider structure with a drive motor, lead screw, and guide rail. The first and second sliders synchronously drive the mounting plate, making the movement of the tension sensor smoother and free from off-center loads. This effectively avoids the wobbling and displacement deviation problems that may occur with the movement of a single slider, ensuring the linearity and stability of the applied axial pull-out force. At the same time, the mounting plate provides a stable mounting base for the tension sensor, further improving the accuracy and reliability of the axial force detection data.

[0009] Furthermore, the radial force loading assembly includes a pulley guide component, an angle-adjustable hinge, and a flexible force transmission component. The angle-adjustable hinge connects the pulley guide component to the support body. One end of the flexible force transmission component, guided by the pulley guide component, is connected to the sidewall of the sample tube, while the other end is used to apply an adjustable radial load. The radial force loading assembly flexibly adjusts the spatial orientation of the pulley guide component via the angle-adjustable hinge, enabling the flexible force transmission component guided by it to accurately apply a radial tensile force perpendicular to the central axis of the sample tube to the sidewall, ensuring the accuracy of the radial force application direction. The flexible force transmission component can also flexibly adjust the radial load magnitude to adapt to different testing conditions, achieving directional and adjustable application of the radial tensile force and improving the adaptability and accuracy of radial force loading.

[0010] Furthermore, the flexible force transmission component includes a flexible force transmission rope, a hook, and weights. The pulley guide component is a fixed pulley. One end of the flexible force transmission rope passes through the fixed pulley and is connected to the side wall of the sample tube, while the other end is connected to the hook. The weights are placed on the hook. The flexible force transmission component adopts a combination structure of flexible force transmission rope, hook, and weights. Combined with the guiding effect of the fixed pulley, it achieves convenient adjustment and stable transmission of radial load. The magnitude of the radial tension can be precisely adjusted by adding or removing weights. The operation is simple and the load control is precise. The design of the fixed pulley effectively changes the direction of force transmission, ensuring that the flexible force transmission rope always applies force to the sample tube in a horizontal direction, further ensuring that the radial force application direction is perpendicular to the central axis of the sample tube.

[0011] Furthermore, the supporting assembly includes a sample tube mounting bracket, a funnel mounting bracket, and an attitude adjustment assembly. The attitude adjustment assembly includes a height adjustment component. The funnel mounting bracket is disposed on the sample tube mounting bracket. The height adjustment component includes a support frame, a support plate, and fasteners for fixing the relative position of the support plate and the support frame. The support frame is fixed on the funnel mounting bracket and has a sliding groove. The fasteners are disposed in the sliding groove and connected to the support plate. The support plate is fixedly connected to the funnel assembly. The addition of the sample tube mounting bracket, funnel mounting bracket, and attitude adjustment assembly to the support body provides a stable and adjustable mounting base for the sample tube assembly. The height adjustment component, through the cooperation of the sliding groove of the support frame, the fasteners, and the support plate, can flexibly adjust the installation height of the funnel assembly, thereby adapting to the height position of the sample tube assembly. This ensures that the radially loaded flexible force transmission rope is always in an approximately horizontal state, and that the radial tension direction remains perpendicular to the central axis of the sample tube.

[0012] Furthermore, the attitude adjustment assembly also includes a circumferential rotating component, which comprises a fixed platform, a rotating disk, a knob, and a transmission assembly. The fixed platform is mounted on the sample tube mounting bracket, the rotating disk is rotatably connected to the fixed platform, the knob is mounted on the fixed platform, and the transmission assembly is located between the knob and the rotating disk to drive the rotating disk to rotate. The funnel mounting bracket is fixedly connected to the rotating disk. The circumferential rotating component added to the attitude adjustment assembly, through the knob driving the transmission assembly and the rotating disk, can precisely and conveniently control the rotation of the sample tube assembly around its own axis, realizing radial tensile force loading at different circumferential sidewall positions of the sample tube, meeting the working conditions requirements of multi-directional radial force testing.

[0013] Furthermore, the funnel assembly includes a funnel, a flexible tube, and a first connecting component. A second connecting component is located at the top of the sample tube. The funnel is fixed to the funnel mounting bracket. One end of the flexible tube communicates with the bottom of the funnel, and the other end communicates with the opening of the sample tube. The first connecting component is fixedly connected to the funnel assembly and sleeved on the outside of the second connecting component, with the first connecting component and the second connecting component engaging. The funnel assembly communicates with the sample tube through the flexible tube. Simultaneously, the first connecting component sleeved onto the second connecting component at the top of the sample tube accurately replicates the actual engaging structure between the funnel and the sample tube in stellar soil sampling. This ensures that the test force scenario closely matches actual engineering conditions, effectively restoring the true engagement force state when the sample tube separates from the funnel assembly, making the separation force test results more valuable for engineering reference.

[0014] Furthermore, the first connecting component is internally provided with circumferentially distributed movable grooves and movable snap-fit ​​members that can move within the movable grooves. The movable snap-fit ​​members include an elastic element and a movable element that abuts against the elastic element. The second connecting component is provided with a snap-fit ​​groove that engages with the movable element. The first connecting component and the second connecting component form an elastic snap-fit ​​structure through the circumferentially distributed movable grooves, the movable element that abuts against the elastic element, and the snap-fit ​​groove. This accurately reproduces the actual snap-fit ​​force characteristics of the sample tube and funnel in stellar soil sampling, making the snap-fit ​​resistance during sample tube separation more consistent with engineering practice. This avoids the force deviation problem caused by simple snap-fit ​​structures, further improving the authenticity and accuracy of the separation force test, and providing reliable test conditions for verifying the separation performance of the snap-fit ​​structure.

[0015] Furthermore, the system also includes a lifting ring that engages with the sample tube. The lifting ring comprises a first connecting ring disposed at the bottom of the sample tube and a second connecting ring disposed on the side wall of the sample tube. The first connecting ring is connected to the axial force loading test assembly, and the second connecting ring is connected to the radial force loading assembly. The sample tube is precisely connected to the axial force loading test assembly via the first connecting ring, ensuring that the axial pull-out force is applied along the central axis of the sample tube, avoiding uneven force distribution caused by axial force misalignment. Simultaneously, the second connecting ring is stably connected to the radial force loading assembly, allowing the radial pull-out force to act precisely on the side wall of the sample tube. This achieves a precise correspondence between the axial and radial loading forces and the sample tube, ensuring effective and stable transmission of both loading forces and preventing connection slippage or force offset during loading, further improving the stability of the separation force test process and the accuracy of the test data.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. It can simultaneously apply an axial pulling force along the central axis and a radial pulling force perpendicular to the axis to the sample tube, simulating the multi-force coupling stress condition when the robotic arm separates the sample tube from the funnel assembly, making the test results more consistent with the actual engineering scenario of spherical soil sampling, and providing reliable data support for determining the reasonable force range for robotic arm separation; 2. The height adjustment component of the sample tube attitude adjustment assembly can flexibly adjust the installation height of the sample tube assembly to precisely match the radial loading path, ensuring that the flexible force transmission rope for radial loading is always in a near-horizontal state, and ensuring that the radial tension application direction remains perpendicular to the central axis of the sample tube; the circumferential rotation component can adjust the circumferential angle of the sample tube around its own axis to achieve radial tension loading at different circumferential sidewall positions of the sample tube. The combination of the two improves the accuracy and consistency of the testing process and can meet the sample tube separation force testing requirements under various separation conditions. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the separation force testing device for star soil sample tubes. Figure 2 This is a schematic diagram of the axial force loading test assembly. Figure 3 This is a schematic diagram of the attitude adjustment component. Figure 4 This is a cross-sectional view of the first connecting component and the second connecting component; Figure 5 This is a schematic diagram of the sample tube structure.

[0018] In the attached diagram: 100, Support body; 110, Sample tube mounting bracket; 120, Funnel mounting bracket; 200, Axial force loading test assembly; 210, Linear drive module; 211, Drive motor; 212, Lead screw; 213, First slider; 214, Second slider; 215, Guide rail; 216, Mounting plate; 220, Tension sensor; 230, Flexible force transmission rope; 300, Radial force loading assembly; 310, Pulley guide component; 320, Angle adjustment hinge; 331, Hook; 332, Weight; 400, Funnel assembly. Components; 410, funnel; 420, hose; 430, first connecting assembly; 431, movable groove; 432, elastic element; 433, movable element; 500, sample tube; 510, second connecting assembly; 511, slot; 521, first connecting ring; 522, second connecting ring; 600, posture adjustment assembly; 610, height adjustment component; 611, support frame; 612, support plate; 613, fastener; 614, slide; 620, circumferential rotating component; 621, fixed platform; 622, rotating disk; 623, knob. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0020] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] Example 1 This embodiment is the first embodiment of the star soil sample tube separation force testing device, including a support body 100, an axial force loading test component 200, a radial force loading component 300, and a bearing component. The bearing component is disposed on the support body 100 and is used to install the funnel component 400 and the sample tube 500 that are interlocked. The axial force loading test component 200 is mounted on the support body 100 and connected to the bottom center of the sample tube 500. It is used to apply an axial pull force along the central axis of the sample tube 500 and simultaneously detect the magnitude of the axial pull force. The radial force loading component 300 is mounted on the support body 100 and can be connected to the side wall of the sample tube 500. It is used to apply a radial pull force in a direction perpendicular to the central axis of the sample tube 500.

[0022] The sample tube separation force testing device of the present invention uses a support body 100 as the basic load-bearing structure. A sample tube assembly, consisting of a funnel assembly 400 and a sample tube 500 interlocked, is mounted on the support body 100. An axial force loading testing assembly 200, mounted on the support body 100 and connected to the center of the bottom of the sample tube 500, applies an axial pulling force to the sample tube 500 along its central axis. Simultaneously, a radial force loading assembly 300, also mounted on the support body 100 and connected to the sidewall of the sample tube 500, applies a force perpendicular to the center of the sample tube 500. A radial tensile force is applied to the sample tube 500 along the axial direction. The magnitude of the axial pull-out force is detected simultaneously when the sample tube 500 is separated from the funnel assembly 400. This achieves the simultaneous application of axial pull-out force and radial tensile force and the accurate detection of axial force during the separation of the sample tube 500. It can simulate the actual force state when the sample tube 500 is separated from the funnel assembly 400, and simulate the multi-force coupling force condition when the robotic arm separates the sample tube 500 from the funnel assembly 400. This makes the test results more consistent with the actual engineering scenario of spherical soil sampling and provides reliable data support for determining the reasonable force range for robotic arm separation.

[0023] The axial force loading test assembly 200 includes a linear drive module 210, a tension sensor 220, and a flexible force transmission rope 230. The linear drive module 210 moves in a direction parallel to the central axis of the sample tube 500. The tension sensor 220 is mounted on the linear drive module 210. One end of the flexible force transmission rope 230 is connected to the tension sensor 220, and the other end is connected to the bottom center of the sample tube 500. Through the coordinated design of the linear drive module 210, the tension sensor 220, and the flexible force transmission rope 230, the axial force loading test assembly 200 utilizes the linear drive module 210, which is parallel to the central axis of the sample tube 500, to provide power. The axial force is then precisely transmitted to the bottom center of the sample tube 500 via the flexible force transmission rope 230. Simultaneously, the tension sensor 220 can detect the magnitude of the axial pull-out force, achieving integrated application and detection of axial force. This ensures that the axial pull-out force acts precisely along the central axis of the sample tube 500, improving the accuracy and synchronicity of the axial force test.

[0024] The linear drive module 210 includes a drive motor 211, a lead screw 212, a first slider 213, a second slider 214, a guide rail 215, and a mounting plate 216. The drive motor 211 is connected to the lead screw 212, the first slider 213 is slidably connected to the lead screw 212, the second slider 214 is slidably connected to the guide rail 215, and both the first slider 213 and the second slider 214 are fixedly connected to the mounting plate 216. The tension sensor 220 is fixed on the mounting plate 216. The linear drive module 210 adopts a dual slider structure consisting of a drive motor 211, a lead screw 212, and a guide rail 215. The first slider 213 and the second slider 214 synchronously drive the mounting plate 216 to move, making the movement of the tension sensor 220 smoother and free from off-center load. This effectively avoids the shaking and displacement deviation problems that may occur when moving a single slider, ensuring the linearity and stability of the applied axial pull-out force. At the same time, the mounting plate 216 provides a stable mounting base for the tension sensor 220, further improving the accuracy and reliability of the axial force detection data.

[0025] The radial force loading assembly 300 includes a pulley guide component 310, an angle adjustment hinge 320, and a flexible force transmission component. The angle adjustment hinge 320 connects the pulley guide component 310 to the support body 100. One end of the flexible force transmission component is guided by the pulley guide component 310 and connected to the side wall of the sample tube 500, while the other end is used to apply an adjustable radial load. The radial force loading assembly 300 flexibly adjusts the spatial orientation of the pulley guide component 310 through the angle adjustment hinge 320, enabling the flexible force transmission component guided by it to accurately apply a radial tensile force perpendicular to the central axis of the sample tube 500 to the side wall of the sample tube 500. This ensures the accuracy of the radial force application direction, and the flexible force transmission component can flexibly adjust the radial load magnitude to adapt to different testing conditions. This achieves directional and adjustable application of radial tensile force, improving the adaptability and accuracy of radial force loading.

[0026] The flexible force transmission component includes a flexible force transmission rope 230, a hook 331, and a weight 332. The pulley guide component 310 is a fixed pulley. One end of the flexible force transmission rope 230 passes through the fixed pulley and is connected to the side wall of the sample tube 500, while the other end is connected to the hook 331. The weight 332 is placed on the hook 331. The flexible force transmission component adopts a combination structure of the flexible force transmission rope 230, the hook 331, and the weight 332. With the guiding effect of the fixed pulley, it realizes convenient adjustment and stable transmission of radial load. The magnitude of the radial tension can be precisely adjusted by adding or removing the weight 332. The operation is simple and the load control is precise. The design of the fixed pulley effectively changes the direction of force transmission, ensuring that the flexible force transmission rope 230 always applies force to the sample tube 500 in the horizontal direction, and further ensuring that the direction of radial force application is perpendicular to the central axis of the sample tube 500.

[0027] Example 2 This embodiment is the second embodiment of the star soil sample tube separation force testing device. This embodiment is similar to the first embodiment, except that the supporting component includes a sample tube mounting frame 110, a funnel mounting frame 120, and an attitude adjustment component 600. The attitude adjustment component 600 includes a height adjustment component 610. The funnel mounting frame 120 is disposed on the sample tube mounting frame 110. The height adjustment component 610 includes a support frame 611, a support plate 612, and fasteners 613 for fixing the relative position of the support plate 612 and the support frame 611. The support frame 611 is fixed on the funnel mounting frame 120. The support frame 611 is provided with a sliding groove 614. The fasteners 613 are disposed in the sliding groove 614 and connected to the support plate 612. The support plate 612 is fixedly connected to the funnel assembly 400. A sample tube mounting bracket 110, a funnel mounting bracket 120, and an attitude adjustment component 600 are added to the support body 100, providing a stable and adjustable mounting base for the sample tube assembly. The height adjustment component 610, through the cooperation of the sliding groove 614 of the support bracket 611, the fastener 613, and the support plate 612, can flexibly adjust the installation height of the funnel assembly 400, thereby adapting to the height position of the sample tube assembly. This ensures that the radially loaded flexible force transmission rope 230 is always in a nearly horizontal state, and that the radial tension direction remains perpendicular to the central axis of the sample tube 500. In this embodiment, the sample tube mounting bracket 110 is equipped with a sponge pad for cushioning and protecting the sample tube assembly during testing.

[0028] The attitude adjustment assembly 600 also includes a circumferential rotating component 620. The circumferential rotating component 620 includes a fixed platform 621, a rotating disk 622, a knob 623, and a transmission assembly. The fixed platform 621 is mounted on the sample tube mounting bracket 110. The rotating disk 622 is rotatably connected to the fixed platform 621. The knob 623 is mounted on the fixed platform 621. The transmission assembly is located between the knob 623 and the rotating disk 622, used to drive the rotating disk 622 to rotate. The funnel mounting bracket 120 is fixedly connected to the rotating disk 622. The circumferential rotating component 620 added to the attitude adjustment assembly 600, through the knob 623 driving the transmission assembly and the rotating disk 622, can precisely and conveniently control the rotation of the sample tube assembly around its own axis, realizing radial tensile force loading at different circumferential sidewall positions of the sample tube 500, meeting the working conditions requirements of multi-directional radial force testing.

[0029] The funnel assembly 400 includes a funnel 410, a flexible tube 420, and a first connecting assembly 430. The sample tube 500 is provided with a second connecting assembly 510 at the top. The funnel 410 is fixed on the funnel mounting bracket 120. One end of the flexible tube 420 is connected to the bottom of the funnel 410, and the other end is connected to the opening of the sample tube 500. The first connecting assembly 430 is fixedly connected to the funnel assembly 400 and sleeved on the outside of the second connecting assembly 510, and the first connecting assembly 430 and the second connecting assembly 510 are engaged. The funnel assembly 400 is connected to the sample tube 500 via the flexible tube 420. At the same time, the first connecting assembly 430 is fitted with the second connecting assembly 510, which is snapped onto the top of the sample tube 500. This accurately replicates the actual snap-fit ​​structure between the funnel 410 and the sample tube 500 in the spherical soil sampling, making the test force scenario highly consistent with the actual engineering situation. It effectively restores the real snap-fit ​​force state when the sample tube 500 and the funnel assembly 400 are separated, making the separation force test results more valuable for engineering reference.

[0030] Example 3 This embodiment is the third embodiment of the spherical soil sample tube separation force testing device. Similar to the first embodiment, the difference lies in that the first connecting component 430 has a circumferentially distributed movable groove 431 and a movable locking member that can move within the movable groove 431. The movable locking member includes an elastic member 432 and a movable member 433 that abuts against the elastic member 432. The second connecting component 510 has a locking groove 511 that engages with the movable member 433. The first connecting component 430 and the second connecting component 510 form an elastic locking structure through the circumferentially distributed movable groove 431, the movable member 433 abutting against the elastic member 432, and the locking groove 511. This accurately reproduces the actual locking force characteristics of the sample tube 500 and funnel 410 during spherical soil sampling, making the locking resistance during sample tube 500 separation more closely resemble engineering practice. This avoids the force deviation problem caused by the simple locking structure, further improving the authenticity and accuracy of the separation force test and providing reliable test conditions for verifying the separation performance of the locking structure.

[0031] This embodiment also includes a lifting ring that snaps into the sample tube 500. The lifting ring includes a first connecting ring 521 disposed at the bottom of the sample tube 500 and a second connecting ring 522 disposed on the side wall of the sample tube 500. The first connecting ring 521 is connected to the axial force loading test assembly 200, and the second connecting ring 522 is connected to the radial force loading assembly 300. The lifting ring in this embodiment is divided into two symmetrical parts, each part of which is provided with an integrally formed first connecting ring 521 and second connecting ring 522. During installation, both symmetrical lifting ring parts are snapped onto the sample tube, and the relative positions of the two parts are fixed by bolts disposed above the first connecting ring 521 to form a complete lifting ring. The sample tube 500 is precisely connected to the axial force loading test assembly 200 via the first connecting ring 521, ensuring that the axial pull-out force is applied along the central axis of the sample tube 500 and avoiding uneven force distribution on the sample tube 500 due to axial force misalignment. At the same time, it is stably connected to the radial force loading assembly 300 via the second connecting ring 522, allowing the radial pull-out force to be precisely applied to the sidewall of the sample tube 500. This achieves a precise correspondence between the axial and radial loading forces and the sample tube 500, ensuring the effective and stable transmission of the two loading forces and preventing connection slippage and force offset during loading, further improving the stability of the separation force test process and the accuracy of the test data.

[0032] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0033] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An asteroid sample tube separation force testing device, characterized by, The device includes a support body (100), an axial force loading test assembly (200), a radial force loading assembly (300), and a bearing assembly. The bearing assembly is disposed on the support body (100) and is used to install a funnel assembly (400) and a sample tube (500) that are interlocked. The axial force loading test assembly (200) is mounted on the support body (100) and connected to the bottom center of the sample tube (500). It is used to apply an axial pull-out force along the central axis of the sample tube (500) and simultaneously detect the magnitude of the axial pull-out force. The radial force loading assembly (300) is mounted on the support body (100) and can be connected to the side wall of the sample tube (500). It is used to apply a radial pull-out force in a direction perpendicular to the central axis of the sample tube (500).

2. The asteroid sample tube separation force test apparatus according to claim 1, characterized by, The axial force loading test assembly (200) includes a linear drive module (210), a tension sensor (220), and a flexible force transmission rope (230). The movement direction of the linear drive module (210) is parallel to the central axis of the sample tube (500). The tension sensor (220) is mounted on the linear drive module (210). One end of the flexible force transmission rope (230) is connected to the tension sensor (220), and the other end is connected to the bottom center of the sample tube (500).

3. The asteroid sample tube separation force test apparatus of claim 2, wherein, The linear drive module (210) includes a drive motor (211), a lead screw (212), a first slider (213), a second slider (214), a guide rail (215), and a mounting plate (216). The drive motor (211) is connected to the lead screw (212), the first slider (213) is slidably connected to the lead screw (212), the second slider (214) is slidably connected to the guide rail (215), the first slider (213) and the second slider (214) are both fixedly connected to the mounting plate (216), and the tension sensor (220) is fixed on the mounting plate (216).

4. The asteroid sample tube separation force test apparatus of claim 1, wherein, The radial force loading assembly (300) includes a pulley guide component (310), an angle adjustment hinge (320), and a flexible force transmission component. The angle adjustment hinge (320) connects the pulley guide component (310) to the support body (100). One end of the flexible force transmission component is guided by the pulley guide component (310) and connected to the side wall of the sample tube (500). The other end is used to apply an adjustable radial load.

5. The asteroid sample tube separation force test apparatus of claim 4, wherein, The flexible force transmission component includes a flexible force transmission rope (230), a hook (331), and a weight (332). The pulley guide component (310) is a fixed pulley. One end of the flexible force transmission rope (230) passes through the fixed pulley and is connected to the side wall of the sample tube (500). The other end is connected to the hook (331). The weight (332) is placed on the hook (331).

6. The asteroid sample tube separation force test apparatus according to any one of claims 1 to 5, characterized by, The supporting assembly includes a sample tube mounting bracket (110), a funnel mounting bracket (120), and a posture adjustment assembly (600). The posture adjustment assembly (600) includes a height adjustment component (610). The funnel mounting bracket (120) is disposed on the sample tube mounting bracket (110). The height adjustment component (610) includes a support frame (611), a support plate (612), and a fastener (613) for fixing the relative position of the support plate (612) and the support frame (611). The support frame (611) is fixed on the funnel mounting bracket (120). The support frame (611) is provided with a sliding groove (614). The fastener (613) is disposed in the sliding groove (614) and connected to the support plate (612). The support plate (612) is fixedly connected to the funnel assembly (400).

7. The asteroid sample tube separation force test apparatus of claim 6, wherein, The attitude adjustment component (600) further includes a circumferential rotating component (620), which includes a fixed platform (621), a rotating disk (622), a knob (623), and a transmission component. The fixed platform (621) is disposed on the sample tube mounting bracket (110), the rotating disk (622) is rotatably connected to the fixed platform (621), the knob (623) is disposed on the fixed platform (621), and the transmission component is disposed between the knob (623) and the rotating disk (622) for driving the rotating disk (622) to rotate. The funnel mounting bracket (120) is fixedly connected to the rotating disk (622).

8. The asteroid sample tube separation force test apparatus of claim 6, wherein, The funnel assembly (400) includes a funnel (410), a flexible tube (420), and a first connecting assembly (430). The sample tube (500) is provided with a second connecting assembly (510) at the top. The funnel (410) is fixed on the funnel mounting bracket (120). One end of the flexible tube (420) is connected to the bottom of the funnel (410), and the other end is connected to the opening of the sample tube (500). The first connecting assembly (430) is fixedly connected to the funnel assembly (400) and sleeved on the outside of the second connecting assembly (510). The first connecting assembly (430) and the second connecting assembly (510) are engaged.

9. The asteroid sample tube separation force test apparatus of claim 8, wherein, The first connecting component (430) is provided with movable grooves (431) evenly distributed in the circumferential direction and movable snap-fit ​​members that can move in the movable grooves (431). The movable snap-fit ​​members include elastic members (432) and movable members (433) that abut against the elastic members (432). The second connecting component (510) is provided with a snap-fit ​​groove (511) that engages with the movable members (433).

10. The asteroid sample tube separation force test apparatus according to any one of claims 1 to 5, characterized by, It also includes a lifting ring that engages with the sample tube (500). The lifting ring includes a first connecting ring (521) disposed at the bottom of the sample tube (500) and a second connecting ring (522) disposed on the side wall of the sample tube (500). The first connecting ring (521) is connected to the axial force loading test assembly (200), and the second connecting ring (522) is connected to the radial force loading assembly (300).

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