An impact mechanism, coring device and coring method for deep sampling of an extraterrestrial planet

Abstract

This invention relates to an impact mechanism, coring device, and coring method for deep sampling of extraterrestrial planets. The impact mechanism includes a cylindrical housing and a drive mechanism, a pull pin, a locking tongue, a limiting sleeve, a compression energy storage spring, and a hammer impact assembly installed within the housing. The lower end of the drive mechanism is coaxially connected to the upper end of the pull pin. The upper end of the compression energy storage spring is connected to the inner wall of the housing. A limiting sleeve is movably fitted on the outside of the pull pin to limit the lower end of the compression energy storage spring. The lower surface of the outer periphery of the limiting sleeve is fixedly connected to the upper end of the hammer impact assembly. The locking tongue is movably assembled between the limiting sleeve and the hammer impact assembly. A sliding hole is provided in the middle of the locking tongue. The lower end of the pull pin movably passes through the sliding hole and can limit the lower surface of the locking tongue in the initial state. The locking tongue elastically slides with a second sliding inclined surface on the hammer impact assembly through a first sliding inclined surface. The locking tongue also slides with a second driving inclined surface on the inner wall of the housing through a first driving inclined surface.

Description

Technical Field

[0001] This invention relates to the field of extraterrestrial planet sampling technology, specifically to an impact mechanism, coring device, and coring method for deep sampling of extraterrestrial planets. Background Technology

[0002] Currently, deep sampling of extraterrestrial planets generally uses spiral drilling sampling. For example, a lunar sampler is used to perform spiral drilling and vibration sampling of deep lunar soil. Although the spiral drilling and vibration lunar sampler can break through a small amount of large lunar rocks at a depth, the combination of spiral drilling and vibration in this type of mechanism causes a certain degree of damage to the stratigraphic sequence of the sampled material, thus losing some scientific value. Summary of the Invention

[0003] In order to solve one or more technical problems existing in the prior art, the present invention provides an impact mechanism, a core sampling device and a core sampling method for deep sampling of extraterrestrial planets.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: The present invention provides an impact mechanism for deep sampling of extraterrestrial planets, including a cylindrical shell and a drive mechanism, a pull pin, a locking tongue, a limiting sleeve, a compression energy storage spring, and a heavy hammer impact assembly installed in the shell. The lower end of the drive mechanism is coaxially connected to the upper end of the pull pin and can drive the pull pin to reciprocate along the axial direction of the shell. The compression energy storage spring is sleeved on the outside of the pull pin and the lower end of the drive mechanism. The upper end of the compression energy storage spring is connected to the inner side wall of the shell. A limiting sleeve is also movably sleeved on the outside of the pull pin to limit the lower end of the compression energy storage spring. The lower surface of the outer periphery of the limiting sleeve is fixedly connected to the upper end of the heavy hammer impact assembly. The locking tongue is movably assembled between the limiting sleeve and the heavy hammer impact assembly. The latch has an axially penetrating sliding hole in its middle. The lower end of the pull stud is movably inserted into the sliding hole and can limit the lower surface of the latch in the initial state, and release the limit on the lower surface of the latch during impact. The upper surface of the latch is radially slidably engaged with the lower surface of the limiting sleeve. The latch is elastically slidably engaged with the second sliding inclined surface on the hammer impact assembly via a first sliding inclined surface. The latch is also slidably engaged with the second driving inclined surface on the inner wall of the housing via a first driving inclined surface. In the initial state, the latch can be compressed by the second driving inclined surface to move radially, and when it moves to a set position, it disengages from the pull stud and moves axially downward along with the limiting sleeve and the hammer impact assembly under the action of a compression energy storage spring to perform an impact.

[0005] The beneficial effects of this invention are: the impact mechanism for deep sampling of extraterrestrial planets is simpler and more reliable than other lunar soil sampling devices, and the in-situ sampling information is completely preserved, providing the most original and effective specimens for subsequent scientific research and analysis of lunar soil samples. Moreover, compared with other deep lunar surface sampling schemes, it consumes the least energy.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, a limiting protrusion is formed on the outer side wall near the lower end of the pull pin, which can limit the lower surface of the latch in the initial state.

[0008] The beneficial effect of adopting the above-mentioned further solution is that by setting a limiting boss, the lower surface of the locking tongue below the sliding hole can be locked and limited.

[0009] Furthermore, an annular groove is formed on the outer side wall of the pull stud near its lower end, and the lower end of the pull stud has a conical structure. The side of the annular groove near the conical structure together with the conical structure forms the limiting boss.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by setting an annular groove, it is convenient to form a limiting boss to limit the lower surface of the lock tongue.

[0011] Furthermore, the upper surface of the locking tongue and the lower surface of the limiting sleeve are slidably engaged by a radial sliding member. The radial sliding member is fixed to the upper surface of the locking tongue, and a radial sliding groove is formed on the lower surface of the limiting sleeve. The radial sliding groove is an elongated groove that extends radially along the housing. The radial sliding member is slidably connected in the radial sliding groove and can move along the radial sliding groove.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by setting a sliding component, the locking tongue can move along the radial sliding groove.

[0013] Furthermore, a convex ring is provided on the inner sidewall of the housing, the limiting sleeve and the compression energy storage spring can move axially within the convex ring, the locking tongue is located inside and below the convex ring, the lower surface of the convex ring is an inclined and annular second driving slope, and the top of the outer peripheral sidewall of the locking tongue is provided with the first driving slope.

[0014] The beneficial effect of adopting the above-mentioned further solution is that by setting a convex ring, it is convenient to drive the bolt, so that the bolt can move axially and radially.

[0015] Furthermore, the impact hammer assembly includes a hammer, a return spring, and a return bevel pin. The lower surface of the outer periphery of the limiting sleeve is fixedly connected to the upper end of the hammer via a connecting plate. The return bevel pin is elastically connected to the upper end of the hammer via the return spring. The lower surface of the middle part of the limiting sleeve, the upper end face of the hammer, the upper end face of the return bevel pin, and the connecting plate together form an assembly space for assembling the latch. The latch is movably assembled within the assembly space. The upper end face of the return bevel pin forms a second sliding bevel, and the lower end face of the latch forms a first sliding bevel. The hammer slides against the inner wall of the housing.

[0016] The beneficial effect of adopting the above-mentioned further solution is that by setting a reset bevel pin and a reset spring, the reset spring can be squeezed when the lock tongue is moving, which facilitates the reset of the lock tongue.

[0017] Furthermore, there are two reset bevel pins, which are symmetrically arranged on both sides of the pull pin. A first sliding bevel is provided on the wall of the sliding hole of the latch, and a first sliding bevel is also provided at the bottom of the outer peripheral side wall of the latch. The two first sliding bevels are arranged in parallel and slide in cooperation with the second sliding bevels formed by the upper surfaces of the two reset bevel pins.

[0018] Furthermore, the upper end face of the hammer is provided with a clearance groove and two mounting grooves. The clearance groove is located at the center of the hammer, and each of the two mounting grooves is connected to a reset bevel pin by a reset spring.

[0019] The present invention also provides a coring device, including an impact mechanism for deep sampling of extraterrestrial planets as described above, and an impactor, which is inserted into the lower end of the housing and can move downward after being impacted. A coring tube is connected to the impactor, and the coring tube is arranged coaxially with the housing.

[0020] The beneficial effects of the present invention are: the coring device of the present invention uses a coring tube to sample lunar soil segment by segment, so that the pressure inside the coring tube is kept at a low level, which is beneficial to improving the sampling rate of the coring tube, and at the same time keeps the resistance to impacting the lunar soil at a low level.

[0021] The present invention also provides a coring method, which is implemented using a coring device as described above, and includes the following steps: In the initial state, the pull pin is movably inserted into the sliding hole of the latch and limits the lower surface of the latch. At this time, the first driving slope of the latch is spaced apart from or abuts against the second driving slope on the inner side wall of the housing. During the impact state, the driving mechanism drives the pull pin to move axially upward. The second driving inclined surface contacts and presses the first driving inclined surface of the latch, causing the latch to move radially along the lower surface of the limiting sleeve and press the second sliding inclined surface of the hammer impact assembly. The lower end of the pull pin releases the limiting on the lower surface of the latch. The latch comes out from the lower end of the pull pin through the sliding hole and, together with the limiting sleeve and the hammer impact assembly, moves axially downward under the action of the compression energy storage spring to perform an impact. The hammer impact assembly impacts the impactor and the core tube. The sample from an extraterrestrial planet enters the core tube to complete one impact sampling. When the impact is completed and the reset is performed, the drive mechanism drives the pull pin to move axially downward, so that the lower end of the pull pin extends into the limiting sleeve and continues to move downward into the sliding hole of the latch. During the process of the lower end of the pull pin entering the sliding hole, the lower end of the pull pin abuts against the latch and causes it to move radially. When the lower end of the pull pin penetrates the sliding hole, the latch moves radially in the opposite direction under the elastic cooperation of the first sliding inclined surface and the second sliding inclined surface. The lower end of the pull pin limits the lower surface of the latch, and the impact mechanism for deep sampling of extraterrestrial planets enters the initial state.

[0022] The beneficial effects of the present invention are: the coring method of the present invention is used to perform impact sampling on the surface of soil on extraterrestrial planets (such as the moon). Its sampling principle does not contain the characteristics of spiral drilling and high-frequency vibration. The sampling sample layer sequence is well maintained and has the characteristics of in-situ sampling. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the front view of the impact mechanism for deep sampling on extraterrestrial planets according to the present invention. Figure 1 ; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA; Figure 3 for Figure 2 Enlarged structural diagram of section D in the middle; Figure 4 for Figure 2 Enlarged structural diagram of section B in the middle; Figure 5 This is a schematic diagram of the front view of the impact mechanism for deep sampling on extraterrestrial planets according to the present invention. Figure 2 ; Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of BB; Figure 7 for Figure 6 Enlarged structural diagram of section C; Figure 8 for Figure 6 Schematic diagram of the cross-sectional structure of DD; Figure 9 This is a schematic diagram of the structure of the locking tongue, the reset bevel pin, and the limiting sleeve of the present invention.

[0024] The attached diagram lists the components represented by each number as follows: 100. Housing; 101. Convex ring; 102. Second drive ramp; 103. Limiting strip plate; 104. Bearing; 200. Motor; 201. Ball screw; 202. Screw and nut assembly; 203. Tie rod; 300. Tack rivet; 301. Annular groove; 302. Limiting boss; 303. Conical structure; 400, Locking tongue; 401, Sliding hole; 402, First sliding ramp; 403, First driving ramp; 500. Limiting sleeve; 501. Connecting plate; 502. Radial sliding groove; 503. Radial sliding component; 504. Bolt; 600. Compression energy storage spring; 700. Counterweight; 701. Reset inclined pin; 702. Reset spring; 703. Second sliding inclined plane; 704. Clearance groove; 705. Mounting groove; 800, Impactor. Detailed Implementation

[0025] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0026] Example 1 like Figures 1-9 As shown, this embodiment of an impact mechanism for deep sampling of an extraterrestrial planet includes a cylindrical housing 100 and a drive mechanism, a pull pin 300, a locking tongue 400, a limiting sleeve 500, a compression energy storage spring 600, and a heavy hammer impact assembly installed within the housing 100. The lower end of the drive mechanism is coaxially connected to the upper end of the pull pin 300 and can drive the pull pin 300 to reciprocate along the axial direction of the housing 100. The compression energy storage spring 600 is sleeved on the outside of the pull pin 300 and the lower end of the drive mechanism. The upper end of the compression energy storage spring 600 is connected to the inner wall of the housing 100. A limiting sleeve 500 is also movably sleeved on the outside of the pull pin 300 to limit the lower end of the compression energy storage spring 600. The lower surface of the outer periphery of the limiting sleeve 500 is fixedly connected to the upper end of the heavy hammer impact assembly. The locking tongue 400 is movably assembled between the limiting sleeve 500 and the heavy hammer impact assembly. The latch 400 has an axially penetrating sliding hole 401 in its middle. The lower end of the pull stud 300 is movably inserted into the sliding hole 401 and can limit the lower surface of the latch 400 in the initial state. In the impact state, the lower surface of the latch 400 is released from the limit. The upper surface of the latch 400 is radially slidably engaged with the lower surface of the limiting sleeve 500. The latch 400 is elastically slidably engaged with the second sliding inclined surface 703 on the hammer impact assembly through the first sliding inclined surface 402. The latch 400 is slidably engaged with the second driving inclined surface 102 on the inner sidewall of the housing 100 through the first driving inclined surface 403. In the initial state, the latch 400 can be squeezed radially by the second driving inclined surface 102 and disengage from the pull stud 300 when it moves to a set position. Together with the limiting sleeve 500 and the hammer impact assembly, it moves axially downward under the action of the compression energy storage spring 600 to perform an impact.

[0027] Optionally, the sliding hole 401 is an elongated hole that extends radially along the housing 100.

[0028] One specific solution in this embodiment is as follows: Figure 3 and Figure 7 As shown, a raised ring 101 is provided on the inner sidewall of the housing 100. The limiting sleeve 500 and the compression energy storage spring 600 can move axially within the raised ring 101. The locking tongue 400 is located below the inner sidewall of the raised ring 101. The lower surface of the raised ring 101 is an inclined, annular second driving slope 102. The top of the outer peripheral sidewall of the locking tongue 400 is provided with the first driving slope 403. By providing the raised ring, it is convenient to drive the locking tongue, enabling it to move axially and radially.

[0029] A preferred embodiment of this solution is as follows: Figure 2 and Figure 4As shown, the drive mechanism of this embodiment includes a motor 200, a ball screw 201, a screw-nut pair 202, and a pull rod 203. The motor 200 is installed inside the housing 100. The output shaft of the motor 200 is fixedly connected to the ball screw 201 and drives the ball screw 201 to rotate inside the housing 100. One end of the ball screw 201 adjacent to the motor 200 is rotatably connected to the inner sidewall of the housing 100 through a bearing 104. The bearing 104 can be an angular contact bearing. A screw nut assembly 202 is threaded onto the ball screw 201. Two opposing limiting strip plates 103 are fixed to the inner wall of the housing 100. The sides of the two limiting strip plates 103 arranged in parallel serve as guide surfaces. The screw nut assembly 202 has two sliding surfaces, which slide in contact with the two guide surfaces and can slide axially along the guide surfaces. The pull rod 203 is a hollow cylindrical structure. The pull rod 203 is sleeved on the outside of the ball screw 201 with a pre-reserved gap between it and the ball screw 201. The upper end of the pull rod 203 is fixedly connected to the screw nut assembly 202. For example, the upper end of the pull rod 203 is also sleeved on the outside of the screw nut assembly 202. The lower end of the pull rod 203 extends beyond the lower end of the ball screw 201 by a preset distance and has a tapered structure. The tapered structure at the lower end of the pull rod 203 is fixedly connected to the upper end of the pull stud 300 by a screw. The upper end of the pull rod 203 also slides in contact with the guide surface of the limiting strip plate 103. When the motor 200 drives the ball screw 201 to rotate, the screw nut pair 202 and the pull rod 203 are limited by the limiting effect of the two limiting strip plates 103 and can only move axially, but cannot rotate, thereby driving the pull pin 300 to move axially within the housing 100.

[0030] The impact mechanism for deep sampling of extraterrestrial planets in this embodiment is simpler and more reliable than other lunar soil sampling devices. It preserves complete in-situ sampling information, providing the most original and effective specimens for subsequent scientific research and analysis of lunar soil samples. Furthermore, it consumes the least energy compared to other deep lunar sampling schemes.

[0031] Example 2 Based on Example 1, this example provides a preferred structure for the rivet 300, such as... Figure 3 and Figure 7 As shown, a limiting boss 302 is formed on the outer side wall of the pull rivet 300 near its lower end. The pull rivet 300 can limit the lower surface of the latch 400 in the initial state through the limiting boss 302. By setting the limiting boss, the lower surface of the latch below the sliding hole can be locked and limited.

[0032] like Figure 3 and Figure 7As shown, in a preferred embodiment, a ring-shaped groove 301 is formed on the outer side wall of the rivet 300 near its lower end. The lower end of the rivet 300 is a conical structure 303. The side of the ring-shaped groove 301 near the conical structure 303 together with the conical structure 303 forms the limiting boss 302. By providing the ring-shaped groove, the limiting boss is easily formed to limit the lower surface of the latch.

[0033] Example 3 Based on Embodiment 1 or Embodiment 2, this embodiment provides a preferred assembly structure for the locking tongue 400 and the limiting sleeve 500. For example... Figure 7 As shown, the upper surface of the latch 400 and the lower surface of the limiting sleeve 500 are slidably engaged by a radial sliding member 503. The radial sliding member 503 is fixed to the upper surface of the latch 400. The lower surface of the limiting sleeve 500 is provided with a radial sliding groove 502, which is an elongated groove extending radially along the housing. The radial sliding member 503 is slidably connected within the radial sliding groove 502 and can move along the radial sliding groove 502. By providing the sliding member, the latch can move along the radial sliding groove.

[0034] Example 4 Based on any of the above embodiments, this embodiment provides a preferred structure for a heavy hammer impact assembly, such as... Figure 3 , Figures 6-9 As shown, the impact assembly includes a hammer 700, a return spring 702, and a return bevel pin 701. The lower surface of the outer periphery of the limiting sleeve 500 is fixedly connected to the upper end of the hammer 700 via a connecting plate 501. Specifically, the connecting plate 501 and the hammer 700 are fixedly connected by bolts 504. Bolt mounting holes can be opened on the lower end face of the hammer 700 for mounting bolts 504. The return bevel pin 701 is elastically connected to the upper end of the hammer 700 via the return spring 702. The lower surface of the middle part of the limiting sleeve 500 and the upper end face of the hammer 700 are connected to the upper end of the hammer 700. The upper end face of the reset bevel pin 701 and the connecting plate 501 together form an assembly space for assembling the latch 400. The latch 400 is movably assembled within the assembly space, which is equivalent to the limiting sleeve 500 and the counterweight 700 clamping the latch 400. The latch 400 can move radially within the assembly space. The upper end face of the reset bevel pin 701 forms the second sliding bevel 703, and the lower end face of the latch 400 forms the first sliding bevel 402. The counterweight 700 slides in engagement with the inner wall of the housing 100. By providing the reset bevel pin and the reset spring, when the latch moves, the reset spring can be compressed, facilitating the reset of the latch.

[0035] Preferred, such as Figure 3 , Figure 7 , Figure 9 As shown, there are two reset bevel pins 701, which are symmetrically arranged on both sides of the pull stud 300. A first sliding bevel 402 is provided on the wall of the sliding hole 401 of the latch 400, and a first sliding bevel 402 is also provided on the bottom of the outer peripheral side wall of the latch 400. The two first sliding bevels 402 are arranged in parallel and slide in cooperation with the second sliding bevels 703 formed by the upper end surfaces of the two reset bevel pins 701.

[0036] like Figure 7 As shown, specifically, the upper end face of the hammer 700 is provided with a clearance groove 704 and two mounting grooves 705. The clearance groove 704 is located at the center of the hammer 700, and each of the two mounting grooves 705 is connected to a reset inclined pin 701 by a reset spring 702.

[0037] In this embodiment, the limiting sleeve 500 and the compression energy storage spring 600 can freely pass through the convex ring 101. The compression energy storage spring 600 can be a commercially available energy storage spring to provide energy for the impact of the hammer.

[0038] Example 5 This embodiment provides a coring device, including an impact mechanism for deep sampling of extraterrestrial planets as described above, and an impactor 800. The impactor 800 is inserted into the lower end of the housing 100 and can move downward after being impacted. A coring tube is connected to the impactor 800, and the coring tube is arranged coaxially with the housing 100.

[0039] The impactor 800 in this embodiment can be an impactor commonly used for extraterrestrial planet sampling, and the core tube can also be a core tube commonly used for extraterrestrial planet sampling.

[0040] The coring device in this embodiment uses a coring tube to sample lunar soil segment by segment, which keeps the pressure inside the coring tube at a low level, which is beneficial to improving the sampling rate of the coring tube, and also keeps the resistance to impacting the lunar soil at a low level.

[0041] Example 6 This embodiment provides a coring method, implemented using the coring device described in Embodiment 5 above, including the following steps: In the initial state, the pull pin 300 is movably inserted into the sliding hole 401 of the latch 400 and limits the lower surface of the latch 400. At this time, the first driving inclined surface 403 of the latch 400 is spaced apart from or abuts against the second driving inclined surface 102 on the inner side wall of the housing 100. During the impact state, the driving mechanism drives the pull pin 300 to move axially upward. The second driving inclined surface 102 contacts and presses the first driving inclined surface 403 of the locking tongue 400, causing the locking tongue 400 to move radially along the lower surface of the limiting sleeve 500 and press the second sliding inclined surface 703 of the hammer impact assembly. The lower end of the pull pin 300 releases the limiting on the lower surface of the locking tongue 400. The locking tongue 400 disengages from the lower end of the pull pin 300 through the sliding hole 401 and moves axially downward together with the limiting sleeve 500 and the hammer impact assembly under the action of the compression energy storage spring 600 to perform an impact. The hammer impact assembly impacts the impactor 800 and the core tube. The sample from an extraterrestrial planet enters the core tube to complete one impact sampling. When the impact is completed and the reset is performed, the drive mechanism drives the pull pin 300 to move axially downward, so that the lower end of the pull pin 300 extends into the limiting sleeve 500 and continues to move downward into the sliding hole 401 of the latch 400. During the process of the lower end of the pull pin 300 entering the sliding hole 401, the lower end of the pull pin 300 abuts against the latch 400 to make it move radially. When the lower end of the pull pin 300 penetrates the sliding hole 401, the latch 400 moves radially in the opposite direction under the elastic cooperation of the first sliding inclined surface 402 and the second sliding inclined surface 703. The lower end of the pull pin 300 limits the lower surface of the latch 400 (that is, the limiting boss at the lower end of the pull pin 300 limits the lower surface of the latch 400). The impact mechanism for deep sampling of extraterrestrial planets enters the initial state.

[0042] The coring method of this embodiment is used to perform impact sampling on the surface of soil on an extraterrestrial planet (such as the moon). Its sampling principle does not contain the characteristics of auger drilling and high-frequency vibration. The sample layer sequence is well preserved and has the characteristics of in-situ sampling.

[0043] In the description of this invention, it should be understood that the terms "length", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An impact mechanism for deep sampling on extraterrestrial planets, characterized in that, The device includes a cylindrical housing and a drive mechanism, a pull pin, a locking tongue, a limiting sleeve, a compression energy storage spring, and a counterweight impact assembly installed within the housing. The lower end of the drive mechanism is coaxially connected to the upper end of the pull pin and can drive the pull pin to reciprocate along the axial direction of the housing. The compression energy storage spring is sleeved on the outside of the pull pin and the lower end of the drive mechanism. The upper end of the compression energy storage spring is connected to the inner wall of the housing. A limiting sleeve is also movably sleeved on the outside of the pull pin to limit the lower end of the compression energy storage spring. The lower surface of the outer periphery of the limiting sleeve is fixedly connected to the upper end of the counterweight impact assembly. The locking tongue is movably assembled between the limiting sleeve and the counterweight impact assembly. The latch has an axially penetrating sliding hole in its middle. The lower end of the pull stud is movably inserted into the sliding hole and can limit the lower surface of the latch in the initial state, and release the limit on the lower surface of the latch during impact. The upper surface of the latch is radially slidably engaged with the lower surface of the limiting sleeve. The latch is elastically slidably engaged with the second sliding inclined surface on the hammer impact assembly via a first sliding inclined surface. The latch is also slidably engaged with the second driving inclined surface on the inner wall of the housing via a first driving inclined surface. In the initial state, the latch can be compressed by the second driving inclined surface to move radially, and when it moves to a set position, it disengages from the pull stud and moves axially downward along with the limiting sleeve and the hammer impact assembly under the action of a compression energy storage spring to perform an impact.

2. The impact mechanism for deep sampling on extraterrestrial planets according to claim 1, characterized in that, A limiting protrusion is formed on the outer side wall near the lower end of the pull pin, which can limit the lower surface of the latch in the initial state.

3. The impact mechanism for deep sampling on extraterrestrial planets according to claim 2, characterized in that, A ring-shaped groove is formed on the outer side wall of the pull stud near its lower end. The lower end of the pull stud has a conical structure. The side of the ring-shaped groove near the conical structure and the conical structure together form the limiting boss.

4. The impact mechanism for deep sampling on extraterrestrial planets according to claim 1, characterized in that, The upper surface of the locking tongue and the lower surface of the limiting sleeve are slidably engaged by a radial sliding member. The radial sliding member is fixed to the upper surface of the locking tongue. A radial sliding groove is provided on the lower surface of the limiting sleeve. The radial sliding groove is an elongated groove that extends radially along the housing. The radial sliding member is slidably connected in the radial sliding groove and can move along the radial sliding groove.

5. The impact mechanism for deep sampling on extraterrestrial planets according to claim 1, characterized in that, A raised ring is provided on the inner side wall of the housing. The limiting sleeve and the compression energy storage spring can move axially within the raised ring. The locking tongue is located inside and below the raised ring. The lower surface of the raised ring is an inclined and annular second driving slope. The top of the outer peripheral side wall of the locking tongue is provided with the first driving slope.

6. The impact mechanism for deep sampling on extraterrestrial planets according to claim 1, characterized in that, The impact hammer assembly includes a hammer, a return spring, and a return bevel pin. The lower surface of the outer periphery of the limiting sleeve is fixedly connected to the upper end of the hammer via a connecting plate. The return bevel pin is elastically connected to the upper end of the hammer via the return spring. The lower surface of the middle part of the limiting sleeve, the upper end face of the hammer, the upper end face of the return bevel pin, and the connecting plate together form an assembly space for assembling the latch. The latch is movably assembled within the assembly space. The upper end face of the return bevel pin forms a second sliding bevel, and the lower end face of the latch forms a first sliding bevel. The hammer slides against the inner wall of the housing.

7. The impact mechanism for deep sampling on extraterrestrial planets according to claim 6, characterized in that, Two reset bevel pins are provided, and the two reset bevel pins are symmetrically arranged on both sides of the pull pin. A first sliding bevel is provided on the wall of the sliding hole of the lock tongue, and a first sliding bevel is also provided on the bottom of the outer peripheral side wall of the lock tongue. The two first sliding bevels are arranged in parallel and slide in cooperation with the second sliding bevels formed by the upper end surfaces of the two reset bevel pins.

8. The impact mechanism for deep sampling on an extraterrestrial planet according to claim 6, characterized in that, The upper end face of the hammer has a clearance groove and two mounting grooves. The clearance groove is located at the center of the hammer, and each of the two mounting grooves is connected to a reset bevel pin by a reset spring.

9. A core sampling device, characterized in that, The device includes an impact mechanism for deep sampling of an extraterrestrial planet as described in any one of claims 1 to 8, and further includes an impactor inserted inside the lower end of the housing and capable of moving downward after being impacted, wherein a core tube is connected to the impactor and the core tube is arranged coaxially with the housing.

10. A method for core extraction, characterized in that, The process, implemented using the core extraction device as described in claim 9, includes the following steps: In the initial state, the pull pin is movably inserted into the sliding hole of the latch and limits the lower surface of the latch. At this time, the first driving slope of the latch is spaced apart from or abuts against the second driving slope on the inner side wall of the housing. During the impact state, the driving mechanism drives the pull pin to move axially upward. The second driving inclined surface contacts and presses the first driving inclined surface of the latch, causing the latch to move radially along the lower surface of the limiting sleeve and press the second sliding inclined surface of the hammer impact assembly. The lower end of the pull pin releases the limiting on the lower surface of the latch. The latch comes out from the lower end of the pull pin through the sliding hole and, together with the limiting sleeve and the hammer impact assembly, moves axially downward under the action of the compression energy storage spring to perform an impact. The hammer impact assembly impacts the impactor and the core tube. The sample from an extraterrestrial planet enters the core tube to complete one impact sampling. When the impact is completed and the reset is performed, the drive mechanism drives the pull pin to move axially downward, so that the lower end of the pull pin extends into the limiting sleeve and continues to move downward into the sliding hole of the latch. During the process of the lower end of the pull pin entering the sliding hole, the lower end of the pull pin abuts against the latch and causes it to move radially. When the lower end of the pull pin penetrates the sliding hole, the latch moves radially in the opposite direction under the elastic cooperation of the first sliding inclined surface and the second sliding inclined surface. The lower end of the pull pin limits the lower surface of the latch, and the impact mechanism for deep sampling of extraterrestrial planets enters the initial state.

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