Double-row wire mesh wheels for manned lunar rover based on shape memory alloy

Abstract

The present invention relates to the technical field of aerospace probe parts, and specifically to a double-row wire mesh wheel of a manned lunar rover based on shape memory alloy, comprising a central hub, an annular support rim, a double-row annular load-bearing member and a woven mesh wheel, wherein the annular support rim is sleeved on the central hub, the double-row annular load-bearing member is connected to the central hub and the annular support rim, the woven mesh wheel is sleeved on the central hub, wrapping the annular support rim and the double-row annular load-bearing member, both sides of the woven mesh wheel are connected to the central hub and the double-row annular load-bearing member, the woven mesh wheel is connected to the annular support rim through the double-row annular load-bearing member, the annular support rim, the double-row annular load-bearing member and the woven mesh wheel are all made of shape memory alloy, which solves the technical problems in the prior art of weak wheel performance and safety performance, small tolerable deformation, limited load-bearing capacity resulting in short wheel service life, and when any side of the wheel tire is damaged due to terrain, the entire tire becomes unusable.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace probe components, and in particular to a double-row wire mesh wheel of a manned lunar rover based on shape memory alloy. Background Art

[0002] With the continuous development of space technology, the demand for lunar exploration is increasing. As a space probe used for lunar exploration, a manned lunar rover needs to be able to land and walk on the lunar surface. Both landing and walking require wheels, but the traditional inflatable wheels currently used have some defects.

[0003] First, the tires of traditional pneumatic wheels are rubber tires. After being affected by space radiation and temperature changes, the performance of the material of rubber tires will be greatly degraded, affecting the performance of the wheel. In addition, rubber tires may be punctured or underinflated, affecting the safety performance of the wheel. Secondly, the deformation that traditional pneumatic wheels can withstand is small, and traditional pneumatic wheels will be permanently damaged due to huge deformation when impacted on the complex and harsh terrain of the lunar surface, affecting the safety performance of the wheel. Thirdly, the load-bearing capacity of traditional pneumatic wheels is limited. When the load is too large, the wheel will be excessively worn. Long-term overload use will affect the service life of the wheel. Finally, the tires of traditional pneumatic wheels are usually an integrated structure. When any side of the tire is damaged due to the terrain, the entire tire will become unusable. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a double-row wire mesh wheel for a manned lunar rover based on shape memory alloy, which is used to solve the technical problems in the prior art that the material properties of the tires of traditional pneumatic wheels will be greatly degraded after being affected by space radiation and temperature changes, affecting the performance of the wheels, and the tires of traditional pneumatic wheels may be punctured or underinflated, affecting the safety performance of the wheels; the technical problems that traditional pneumatic wheels can withstand a small amount of deformation and will undergo huge deformation and permanent damage when impacted, affecting the safety performance of the wheels; the technical problems that the load-bearing capacity of traditional pneumatic wheels is limited and long-term excessive load will affect the service life of the wheels; and the technical problems that the tires of traditional pneumatic wheels are usually an integrated structure and will become unusable when any side is damaged.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] A double-row wire mesh wheel for a manned lunar rover based on shape memory alloy, comprising a central hub, an annular support rim, a double-row annular load-bearing member, and a woven mesh wheel;

[0007] The annular support rim is fixedly sleeved on the central hub along the circumferential direction of the central hub and is located in the middle area of ​​the central hub. The material of the annular support rim is shape memory alloy;

[0008] The double-row annular load-bearing member includes a first annular load-bearing member and a second annular load-bearing member, wherein the first annular load-bearing member and the second annular load-bearing member are both made of shape memory alloy;

[0009] The first annular load-bearing member is fixedly sleeved on one of the outer peripheral sides of the central hub, and the side of the first annular load-bearing member close to the annular support rim is fixedly connected to the annular support rim, and the side away from the annular support rim is fixedly connected to the central hub;

[0010] The second annular load-bearing member is fixedly sleeved on the other outer peripheral side of the central hub, and the side of the second annular load-bearing member close to the annular support rim is fixedly connected to the annular support rim, and the side away from the annular support rim is fixedly connected to the central hub;

[0011] The woven mesh wheel is in the shape of a ring and is formed by weaving a plurality of wires in pairs. The material of the wires is shape memory alloy. The woven mesh wheel is sleeved on the central hub, wrapping the annular support rim and the double-row annular load-bearing members, and one side close to the first annular load-bearing member is fixedly connected to the first annular load-bearing member and the central hub, and the other side close to the second annular load-bearing member is fixedly connected to the second annular load-bearing member and the central hub. The woven mesh wheel is fixedly connected to both sides of the annular support rim through the double-row annular load-bearing members.

[0012] In the double-row wire mesh wheel of the manned lunar rover based on shape memory alloy described in the embodiment of the present application, the shape memory alloy is one of titanium-nickel alloy, titanium-nickel-zirconium alloy, titanium-nickel-hafnium alloy, titanium-nickel-iron alloy, titanium-nickel-copper alloy, titanium-nickel-copper-aluminum alloy, copper-aluminum-manganese alloy, copper-aluminum-nickel alloy, copper-zinc-aluminum alloy, iron-nickel-cobalt-titanium alloy, iron-nickel-cobalt-aluminum alloy and iron-manganese-silicon alloy.

[0013] In the double-row wire mesh wheel of the shape memory alloy-based manned lunar rover described in an embodiment of the present application, the first annular load-bearing member and the second annular load-bearing member are both composed of a plurality of load-bearing spring plates connected end to end, forming a circular ring shape, and the two load-bearing spring plates connected to each other are fixedly connected.

[0014] In the double-row wire mesh wheel of the shape memory alloy-based manned lunar rover described in an embodiment of the present application, the outer surface of the woven mesh wheel is a concave shape with a depression in the middle and convexities on both sides. The depression of the woven mesh wheel corresponds to the annular support rim, and the convexities on both sides of the woven mesh wheel correspond to the first annular load-bearing member and the second annular load-bearing member, respectively.

[0015] In the double-row wire mesh wheel of the manned lunar rover based on shape memory alloy described in the embodiment of the present application, the steps of manufacturing the braided mesh wheel include:

[0016] Processing the shape memory alloy through a metal drawing process to form a plurality of the wires;

[0017] Using a braiding machine, the plurality of wires are braided in pairs to form a circular mesh, wherein the plurality of wires in contact with the same wire are parallel to each other, and two wires in contact with each other can slide relative to each other if the contact point is located inside the circular mesh, but cannot slide relative to each other if the contact point is located on both sides of the circular mesh;

[0018] placing the circular woven mesh into a mold so that the circular woven mesh completely fits the mold;

[0019] The mold and the annular mesh are heated together to a temperature of the phase transition point of the annular mesh, and kept warm for 10 to 30 minutes to allow the annular mesh to be shaped, thereby obtaining the mesh wheel.

[0020] In the double-row wire mesh wheel of the shape memory alloy-based manned lunar rover described in the embodiment of the present application, the angle between the two mutually contacting wires is 90 degrees.

[0021] In the double-row wire mesh wheel of the shape memory alloy-based manned lunar rover described in an embodiment of the present application, the distance between two parallel and adjacent wires is defined as D, and the diameter of the wire is d, then 7d≤D≤8d is satisfied.

[0022] In the double-row wire mesh wheel of the shape memory alloy-based manned lunar rover described in the embodiment of the present application, the size range of d is 1 mm-5 mm.

[0023] In the shape memory alloy-based manned lunar rover double-row wire mesh wheel described in an embodiment of the present application, the material of the central wheel hub is aluminum alloy.

[0024] In the shape memory alloy-based manned lunar rover double-row wire mesh wheel described in an embodiment of the present application, the surface of the central wheel hub is provided with a coating.

[0025] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0026] It can be seen from the above technical solutions that the double-row wire mesh wheel of the manned lunar rover based on shape memory alloy provided in the embodiment of the present application replaces the rubber tire of the traditional pneumatic wheel with a woven mesh wheel woven from a number of shape memory alloy wires, thereby solving the technical problems in the prior art that the material performance of the rubber tire is greatly attenuated after being exposed to space radiation and temperature changes, affecting the performance of the wheel, and the rubber tire is punctured or insufficiently inflated, affecting the safety performance of the wheel, thereby improving the performance and safety performance of the wheel; secondly, because the materials of the annular support rim, the double-row annular load-bearing parts and the woven mesh wheel are all shape memory alloys, the shape memory effect, superelastic effect and good fatigue resistance of the shape memory alloy are utilized to enable the wheel to withstand a larger deformation, while improving the load-bearing capacity and recoverable deformation ability of the wheel, thereby solving the problems in the prior art that the traditional pneumatic wheel can withstand a small deformation, resulting in permanent damage to the wheel when subjected to a huge impact, and the limited load-bearing capacity of the traditional pneumatic wheel, resulting in overload affecting the wheel. The technical problem of service life; finally, by fixing the first annular load-bearing member on one of the outer peripheral sides of the center hub, the side of the first annular load-bearing member close to the annular support wheel rim is fixedly connected to the annular support wheel rim, and the side away from the annular support wheel rim is fixedly connected to the center hub, the second annular load-bearing member is fixedly sleeved on the other outer peripheral side of the center hub, the side of the second annular load-bearing member close to the annular support wheel rim is fixedly connected to the annular support wheel rim, and the side away from the annular support wheel rim is fixedly connected to the center hub, the woven mesh wheel is sleeved on the center hub, wrapping the annular support wheel rim and the double-row annular load-bearing members, and its one side close to the first annular load-bearing member is fixedly connected to the first annular load-bearing member and the center hub, and the other side close to the second annular load-bearing member is fixedly connected to the second annular load-bearing member and the center hub, the woven mesh wheel is fixedly connected to the two side edges of the annular support wheel rim through the double-row annular load-bearing members, and the wheel is divided into a three-section double-row wheel structure, which solves the technical problem in the prior art that when any side of the tire is damaged due to terrain, the entire tire cannot be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. The drawings are not intended to be drawn to scale, and for the sake of clarity, not every component will be labeled in each figure. The drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0028] Figure 1 A front view of the double-row wire mesh wheels of the shape memory alloy-based manned lunar rover provided in an embodiment of the present application.

[0029] Figure 2 A schematic structural diagram of the double-row wire mesh wheels of the manned lunar rover based on shape memory alloy provided in an embodiment of the present application.

[0030] Figure 3 for Figure 2 A partial enlarged schematic diagram of the middle A.

[0031] Figure 4 This is a schematic structural diagram of the central hub, annular support rim and double-row annular load-bearing members provided in an embodiment of the present application.

[0032] Description of Figure Numbers:

[0033] 1-Center hub 2-Annular support rim 3-Woven mesh wheel

[0034] 4-first annular load-bearing member 5-second annular load-bearing member 6-first buffer chamber

[0035] 7-Second buffer chamber 8-Third buffer chamber 9-Fourth buffer chamber DETAILED DESCRIPTION

[0036] The embodiment of the present application provides a double-row wire mesh wheel for a manned lunar rover based on shape memory alloy, which is used to solve the technical problems in the prior art. The material properties of the tires of traditional pneumatic wheels will be greatly degraded after being affected by space radiation and temperature changes, affecting the performance of the wheels. In addition, the tires of traditional pneumatic wheels may be punctured or under-inflated, affecting the safety performance of the wheels. The traditional pneumatic wheels can withstand a small amount of deformation, so they will undergo huge deformation and permanent damage when impacted, affecting the safety performance of the wheels. The traditional pneumatic wheels have limited load-bearing capacity, so long-term excessive load will affect the service life of the wheels. The tires of traditional pneumatic wheels are usually an integrated structure, which will make them unusable when any side is damaged.

[0037] The concept of the embodiment of the present application is to replace the rubber tire of the traditional pneumatic wheel with a woven mesh wheel made of a number of shape memory alloy wires based on the shape memory effect and superelastic effect of the shape memory alloy itself, thereby solving the technical problems in the prior art that the material performance of the rubber tire is greatly attenuated after being exposed to space radiation and temperature changes, thereby affecting the performance of the wheel, and the rubber tire is prone to puncture or insufficient inflation, thereby affecting the safety performance of the wheel; secondly, because the materials of the annular support rim, the double-row annular load-bearing parts and the woven mesh wheel are all shape memory alloys, the shape memory effect, superelastic effect and good fatigue resistance of the shape memory alloy are utilized to enable the wheel to withstand a larger deformation, while improving the wheel's load-bearing capacity and the wheel's recoverable deformation ability, thereby solving the technical problems in the prior art that the traditional pneumatic wheel can withstand a small deformation, resulting in permanent damage to the wheel when subjected to a huge impact, and that the traditional pneumatic wheel has a limited load-bearing capacity, resulting in overload use that affects the service life of the wheel; finally The wheel hub is fixedly connected to the first and second wheel hubs by the first and second annular support members, and the wheel hub is fixedly connected to the first and second wheel hubs by the second annular support member.

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0041] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0042] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0043] The present application provides a double-row wire mesh wheel for a manned lunar rover based on shape memory alloy. Figures 1 to 4 As shown, the double-row wire mesh wheel of the manned lunar rover based on shape memory alloy includes a central hub 1, an annular support rim 2, a double-row annular load-bearing member and a woven mesh wheel 3.

[0044] The center hub 1 is annular in shape as a whole, and has a structure in which both sides are high in the width direction of the rim and the middle part is concave toward the center of the center hub 1 .

[0045] The annular support rim 2 is fixedly sleeved on the central hub 1 along the circumferential direction of the central hub 1 and is located in the middle area of ​​the central hub 1. The material of the annular support rim 2 is shape memory alloy.

[0046] Among them, the annular support rim 2 is annular as a whole, and the annular support rim 2 is a structure with high sides and a middle part concave toward the center of the annular support rim 2 in the width direction. It is sleeved on the middle concave part of the central hub 1, and the annular support rim 2 is fixedly connected to the central hub 1 by screws. The annular support rim 2 divides the rim of the central hub 1 into two areas of the same size and shape.

[0047] The double-row annular load-bearing member includes a first annular load-bearing member 4 and a second annular load-bearing member 5 , wherein the first annular load-bearing member 4 and the second annular load-bearing member 5 are both made of shape memory alloy.

[0048] The first annular load-bearing member 4 is fixedly mounted on one of the outer peripheral sides of the central hub 1 . The side of the first annular load-bearing member 4 close to the annular support rim 2 is fixedly connected to the annular support rim 2 , and the side away from the annular support rim 2 is fixedly connected to the central hub 1 .

[0049] The side of the first annular load-bearing member 4 close to the annular support rim 2 is connected to the end of the annular support rim 2 close to the first annular load-bearing member 4 and away from the center of the annular support rim 2 through screws.

[0050] Among them, there is a first buffer cavity 6 between the central hub 1, the annular support rim 2 and the first annular load-bearing member 4. The first buffer cavity 6 is used to provide a buffer space to accommodate deformation when the first annular load-bearing member 4 is deformed, thereby improving the load-bearing and impact resistance of the double-row wire mesh wheel.

[0051] The second annular load-bearing member 5 is fixedly mounted on the other outer peripheral side of the central hub 1 . The side of the second annular load-bearing member 5 close to the annular support rim 2 is fixedly connected to the annular support rim 2 , and the side away from the annular support rim 2 is fixedly connected to the central hub 1 .

[0052] The side of the second annular load-bearing member 5 close to the annular support rim 2 is connected to the end of the side of the annular support rim 2 close to the second annular load-bearing member 4 away from the center of the annular support rim 2 through screws.

[0053] Among them, there is a second buffer cavity 7 between the central hub 1, the annular support rim 2 and the second annular load-bearing member 5. The second buffer cavity 7 is used to provide a buffer space to accommodate deformation when the second annular load-bearing member 5 is deformed, thereby improving the load-bearing and impact resistance of the double-row wire mesh wheel.

[0054] The first annular load-bearing member 4 and the second annular load-bearing member 5 are symmetrically distributed on the outer peripheral side of the central hub 1 with respect to the annular support rim 2 .

[0055] The woven mesh wheel 3 is in the shape of a ring and is made of several wires woven together in pairs. The material of the wires is shape memory alloy. The woven mesh wheel 3 is sleeved on the central hub 1, wrapping the annular support rim 2 and the double-row annular load-bearing members, and one side close to the first annular load-bearing member 4 is fixedly connected to the first annular load-bearing member 4 and the central hub 1, and the other side close to the second annular load-bearing member 5 is fixedly connected to the second annular load-bearing member 5 and the central hub 1. The woven mesh wheel 3 is fixedly connected to both sides of the annular support rim 2 through the double-row annular load-bearing members.

[0056] Among them, one side of the woven mesh wheel 3 close to the first annular load-bearing member 4 is fixedly connected to the first annular load-bearing member 4 and the center hub 1 by screws, and the screws penetrate the first annular load-bearing member 4, the woven mesh wheel 3 and the center hub 1 from the outside to the inside along the radius of one side circle of the center hub 1, wherein the screws pass through the "mesh" of the woven mesh wheel 3; one side of the woven mesh wheel 3 close to the second annular load-bearing member 5 is fixedly connected to the second annular load-bearing member 5 and the center hub 1 by screws, and the screws penetrate the second annular load-bearing member 5, the woven mesh wheel 3 and the center hub 1 from the outside to the inside along the radius of the other side circle of the center hub 1, wherein the screws pass through the "mesh" of the woven mesh wheel 3.

[0057] Among them, the part of the woven mesh wheel 3 located on the outer peripheral side of the annular support rim 2 is fixedly connected to the two side edges of the annular support rim 2 through a double row of annular load-bearing parts. Specifically, screws are passed through the woven mesh wheel 3, the double row of annular load-bearing parts and the two side edges of the annular support rim 2 from the outside to the inside along the radius direction of the annular support rim 2, so that the three are fixedly connected. Among them, the screws pass through the "mesh" of the woven mesh wheel 3 and press the wire material onto the double row of annular load-bearing parts.

[0058] Among them, in other embodiments, the part of the braided mesh wheel 3 located on the outer peripheral side of the annular support rim 2, in addition to fixing the annular support rim 2, the double-row annular load-bearing members and the braided mesh wheel 3 with screws, can also directly connect the two side edges of the annular support rim 2 and the braided mesh wheel 3 by increasing the number of screws.

[0059] Among them, the double-row wire mesh wheel is divided into a "three-section" double-row wheel structure through the connection method of the annular support rim 2, the first annular load-bearing member 4, the second annular load-bearing member 5, and the woven mesh wheel 3 with the central hub 1 and the double-row annular load-bearing members.

[0060] In some embodiments, the shape memory alloy is one of titanium nickel alloy, titanium nickel zirconium alloy, titanium nickel hafnium alloy, titanium nickel iron alloy, titanium nickel copper alloy, titanium nickel copper aluminum alloy, copper aluminum manganese alloy, copper aluminum nickel alloy, copper zinc aluminum alloy, iron nickel cobalt titanium alloy, iron nickel cobalt aluminum alloy and iron manganese silicon alloy.

[0061] Among them, titanium-nickel alloy is the preferred solution, and its performance is more stable. Specifically, the titanium-nickel alloy includes the following components by mass percentage: titanium - 44%, nickel - 56%.

[0062] In some embodiments, the first annular load-bearing member 4 and the second annular load-bearing member 5 are both composed of a plurality of load-bearing elastic sheets connected end to end, forming a circular ring shape, and the two interconnected load-bearing elastic sheets are fixedly connected.

[0063] Among them, the two load-bearing spring plates connected to each other are fixedly connected by screws, and the two opposite sides of any load-bearing spring plate that are not connected to other load-bearing spring plates, the side close to the annular support rim 2 is connected to one side edge of the annular support rim 2, and the other side away from the annular support rim 2 extends in the direction away from the annular support rim 2 and then bends toward the central hub 1 and is connected to the side edge of the central hub 1.

[0064] In some embodiments, the outer surface of the weaving mesh wheel 3 is a concave shape with a recessed middle and raised sides. The recessed portion of the weaving mesh wheel 3 corresponds to the annular support rim 2, and the raised sides of the weaving mesh wheel 3 correspond to the first annular load-bearing member 4 and the second annular load-bearing member 5, respectively.

[0065] Among them, there is a third buffer chamber 8 between the protrusion on one side of the weaving mesh wheel 3 and the first annular load-bearing member 4, and there is a fourth buffer chamber 9 between the protrusion on the other side of the weaving mesh wheel 3 and the second annular load-bearing member 5; the third buffer chamber 8 is used to provide a buffer space to accommodate deformation when the area of ​​the weaving mesh wheel 3 located on the outer peripheral side of the third buffer chamber 8 is deformed, thereby improving the load-bearing and impact resistance of the double-row wire mesh wheel; the fourth buffer chamber 9 is used to provide a buffer space to accommodate deformation when the area of ​​the weaving mesh wheel 3 located on the outer peripheral side of the fourth buffer chamber 9 is deformed, thereby improving the load-bearing and impact resistance of the double-row wire mesh wheel.

[0066] In some embodiments, the steps of making the braided mesh wheel include:

[0067] a. The shape memory alloy is formed into a plurality of wires through a metal drawing process;

[0068] b. Using a braiding machine, weave a plurality of wires in pairs to form a circular mesh, wherein the wires in contact with the same wire are parallel to each other, and the two wires in contact with each other can slide relative to each other if the contact point is located inside the circular mesh, but cannot slide relative to each other if the contact point is located on either side of the circular mesh;

[0069] c. Place the circular mesh into the mold so that it fits the mold completely;

[0070] d. Heat the mold and the annular mesh together to the temperature of the annular mesh phase transition point, and keep the temperature for 10 to 30 minutes to allow the annular mesh to be shaped, thereby obtaining a mesh wheel 3.

[0071] The two cannot slide relative to each other, that is, they are fixedly connected.

[0072] Among them, the two wire materials that are in contact with each other can slide relative to each other if the contact point is located inside the circular mesh, and cannot slide relative to each other if the contact point is located on both sides of the circular mesh, so that the wire materials that are in contact with each other inside the weaving mesh wheel 3 can move tangentially to each other when subjected to external force, thereby increasing the deformation that the weaving mesh wheel 3 can withstand, and further improving the load-bearing and impact resistance of the double-row wire mesh wheel. The two wire materials whose contact points are located on both sides of the circular mesh are fixedly connected so that they are sleeved on the central hub 1 when the weaving mesh wheel 3 is made, and the two sides of the weaving mesh wheel 3 are placed between the double-row annular load-bearing parts and the central hub 1, and will not fall off when connected by screws.

[0073] The temperature range of the phase transition point of the circular mesh is 300 to 400 degrees. Furthermore, the temperature of the phase transition point of the circular mesh can be 350 degrees, and the insulation time can be 25 minutes.

[0074] The thickness of the weaving mesh wheel 3 is determined by the diameter of the wire material. Specifically, the thickness of the weaving mesh wheel 3 is 1 to 2 times the diameter of the wire material.

[0075] In some embodiments, the angle between two contacting filaments is 90 degrees.

[0076] Among them, the angle between the two contacting wires is 90 degrees. When the two wires slide relative to each other, the sliding ability of any one wire on the other wire in two opposite directions is consistent, and the deformation that can be tolerated is the largest.

[0077] In some embodiments, the distance between two adjacent parallel wires is defined as D, and the diameter of the wire is d, then 7d≤D≤8d is satisfied.

[0078] The distance D between two adjacent parallel wires satisfies 7d≤D≤8d, which is used to ensure the sliding amount of the wires to withstand greater deformation and increase the tolerable deformation of the double-row wire mesh wheel.

[0079] In some embodiments, d ranges from 1 mm to 5 mm.

[0080] If d is less than 1 mm, the load-bearing capacity is weak, and if d is greater than 5 mm, the production cost of the braided mesh wheel 3 is increased and the preparation is difficult. Specifically, the size of d can be 2 mm.

[0081] In some embodiments, the central hub 1 is made of aluminum alloy.

[0082] In some embodiments, the surface of the central hub 1 is provided with a coating.

[0083] The coating material can be zinc, silver, gold or any other material that can provide heat insulation, radiation protection and protection of the lunar vehicle body.

[0084] In summary, the double-row wire mesh wheel of the manned lunar rover based on shape memory alloy provided by the present application replaces the rubber tire of the traditional pneumatic wheel with a woven mesh wheel 3 woven from a plurality of shape memory alloy wires, thereby solving the technical problems in the prior art that the material performance of the rubber tire is greatly attenuated after being exposed to space radiation and temperature changes, thereby affecting the performance of the wheel, and the rubber tire is punctured or insufficiently inflated, thereby affecting the safety performance of the wheel, thereby improving the performance and safety performance of the wheel; secondly, because the materials of the annular support rim 2, the double-row annular load-bearing parts and the woven mesh wheel 3 are all shape memory alloys, the shape memory effect, superelastic effect and good fatigue resistance of the shape memory alloy are utilized to enable the wheel to withstand a larger deformation, while improving the load-bearing capacity and recoverable deformation capacity of the wheel, thereby solving the technical problems in the prior art that the traditional pneumatic wheel can withstand a small deformation, resulting in permanent damage to the wheel when subjected to a huge impact, and the traditional pneumatic wheel has a limited load-bearing capacity, resulting in overload use that affects the service life of the wheel; finally, by The first annular load-bearing member 4 is fixedly sleeved on one of the outer peripheral sides of the central hub 1, the side of the first annular load-bearing member 4 close to the annular support rim 2 is fixedly connected to the annular support rim 2, and the side away from the annular support rim 2 is fixedly connected to the central hub 1, the second annular load-bearing member 5 is fixedly sleeved on the other outer peripheral side of the central hub 1, the side of the second annular load-bearing member 5 close to the annular support rim 2 is fixedly connected to the annular support rim 2, and the side away from the annular support rim 2 is fixedly connected to the central hub 1, the weaving mesh wheel 3 is sleeved on the central hub 1 On the upper part, it wraps the annular support rim 2 and the double-row annular load-bearing parts, and its side edge close to the first annular load-bearing part 4 is fixedly connected to the first annular load-bearing part 4 and the central hub 1, and the other side edge close to the second annular load-bearing part 5 is fixedly connected to the second annular load-bearing part 5 and the central hub 1. The woven mesh wheel 3 is fixedly connected to the two side edges of the annular support rim 2 through the double-row annular load-bearing parts, dividing the wheel into a three-section double-row wheel structure, which solves the technical problem in the prior art that when any side of the tire is damaged due to the terrain, the entire tire cannot be used.

[0085] The above is a detailed introduction to the double-row wire mesh wheels of the manned lunar rover based on shape memory alloy provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A double-row wire mesh wheel for a manned lunar rover based on shape memory alloy, characterized in that: It includes a central hub, an annular supporting rim, a double-row annular load-bearing member and a woven mesh wheel; The annular support rim is fixedly sleeved on the central hub along the circumferential direction of the central hub and is located in the middle area of ​​the central hub. The material of the annular support rim is shape memory alloy; The double-row annular load-bearing member includes a first annular load-bearing member and a second annular load-bearing member, wherein the first annular load-bearing member and the second annular load-bearing member are both made of shape memory alloy; The first annular load-bearing member is fixedly sleeved on one of the outer peripheral sides of the central hub, and the side of the first annular load-bearing member close to the annular support rim is fixedly connected to the annular support rim, and the side away from the annular support rim is fixedly connected to the central hub; The second annular load-bearing member is fixedly sleeved on the other outer peripheral side of the central hub, and the side of the second annular load-bearing member close to the annular support rim is fixedly connected to the annular support rim, and the side away from the annular support rim is fixedly connected to the central hub; The woven mesh wheel is in the shape of a ring and is formed by weaving a plurality of wires in pairs. The material of the wires is shape memory alloy. The woven mesh wheel is sleeved on the central hub, wrapping the annular support rim and the double-row annular load-bearing members, and one side close to the first annular load-bearing member is fixedly connected to the first annular load-bearing member and the central hub, and the other side close to the second annular load-bearing member is fixedly connected to the second annular load-bearing member and the central hub. The woven mesh wheel is fixedly connected to both sides of the annular support rim through the double-row annular load-bearing members.

2. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy according to claim 1, characterized in that: The shape memory alloy is one of titanium-nickel alloy, titanium-nickel-zirconium alloy, titanium-nickel-hafnium alloy, titanium-nickel-iron alloy, titanium-nickel-copper alloy, titanium-nickel-copper-aluminum alloy, copper-aluminum-manganese alloy, copper-aluminum-nickel alloy, copper-zinc-aluminum alloy, iron-nickel-cobalt-titanium alloy, iron-nickel-cobalt-aluminum alloy and iron-manganese-silicon alloy.

3. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy according to claim 1, characterized in that: The first annular load-bearing member and the second annular load-bearing member are both composed of a plurality of load-bearing elastic sheets connected end to end, and are in a circular ring shape. The two load-bearing elastic sheets connected to each other are fixedly connected.

4. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy according to claim 1, characterized in that: The outer surface of the weaving mesh wheel is a concave shape with a depression in the middle and convexities on both sides. The depression of the weaving mesh wheel corresponds to the annular support wheel rim, and the convexities on both sides of the weaving mesh wheel correspond to the first annular load-bearing member and the second annular load-bearing member respectively.

5. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy according to claim 1, characterized in that: The steps of making the braided mesh wheel include: Processing the shape memory alloy through a metal drawing process to form a plurality of the wires; Using a braiding machine, the plurality of wires are braided in pairs to form a circular mesh, wherein the plurality of wires in contact with the same wire are parallel to each other, and two wires in contact with each other can slide relative to each other if the contact point is located inside the circular mesh, but cannot slide relative to each other if the contact point is located on both sides of the circular mesh; placing the circular woven mesh into a mold so that the circular woven mesh completely fits the mold; The mold and the annular mesh are heated together to a temperature of the phase transition point of the annular mesh, and kept warm for 10 to 30 minutes to allow the annular mesh to be shaped, thereby obtaining the mesh wheel.

6. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy according to claim 5, characterized in that: The angle between the two mutually contacting wires is 90 degrees.

7. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy according to claim 5, characterized in that: The distance between two adjacent parallel wires is defined as D, and the diameter of the wire is defined as d, then 7d≤D≤8d is satisfied.

8. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy according to claim 7, characterized in that: The size range of d is 1mm-5mm.

9. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy according to claim 1, characterized in that: The material of the central hub is aluminum alloy.

10. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy according to claim 1, characterized in that: The surface of the central hub is provided with a coating.

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