Manned lunar rover double-row wire mesh wheel based on shape memory alloy

Abstract

The invention relates to the technical field of spaceflight probe parts, in particular to a manned lunar rover double-row wire mesh wheel based on shape memory alloy, which comprises a central hub, an annular supporting rim, a double-row annular bearing part and a woven mesh wheel, the double-row annular bearing part is connected with the center hub and the annular supporting rim, the center hub is sleeved with the woven mesh wheel, the annular supporting rim and the double-row annular bearing part are wrapped with the woven mesh wheel, the two sides of the woven mesh wheel are connected with the center hub and the double-row annular bearing part, and the woven mesh wheel is connected with the annular supporting rim through the double-row annular bearing part. The annular supporting wheel flange, the double-row annular bearing part and the woven mesh wheel are all made of shape memory alloy, and the problems that in the prior art, a wheel is poor in use performance and safety performance, small in bearable deformation quantity and limited in bearing capacity, so that the service life of the wheel is short, and when any side of a tire of the wheel is damaged due to the terrain, the service life of the wheel is short are solved. And the whole tire cannot be used.

Description

Technical Field

[0001] The invention relates to the technical field of aerospace probe parts, 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 human exploration of the moon is increasing. As a space probe used to explore the moon, a manned lunar rover needs to have the functions of landing and walking on the lunar surface. Whether it is landing or walking, wheels are needed, 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 attenuated, affecting the performance of the wheels. In addition, rubber tires may be punctured or under-inflated, affecting the safety performance of the wheels. 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 wheels. Thirdly, the carrying capacity of traditional pneumatic wheels is limited. When the load is too large, the wheels will be excessively worn out. Long-term overload use will affect the service life of the wheels. 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 performance of the tire of a traditional pneumatic wheel will be greatly attenuated after being affected by space radiation and temperature changes, affecting the performance of the wheel, and the tire of the traditional pneumatic wheel may be punctured or under-inflated, affecting the safety performance of the wheel; the traditional pneumatic wheel can withstand a small amount of deformation, and will be greatly deformed and permanently damaged when impacted, affecting the safety performance of the wheel; the traditional pneumatic wheel has a limited load-bearing capacity, and long-term excessive load will affect the service life of the wheel; and the traditional pneumatic wheel tire is usually an integrated structure, and when any side is damaged, it will cause the wheel to become unusable.

[0005] To achieve the above objectives, the present application embodiment adopts 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 wheel rim is fixedly sleeved on the central wheel hub along the circumferential direction of the central wheel hub and is located in the middle area of ​​the central wheel hub. The material of the annular support wheel rim is shape memory alloy;

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

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

[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 a plurality of wires woven together in pairs. The wires are made of shape memory alloy. The woven mesh wheel is sleeved on the central hub, wrapping the annular support wheel rim and the double-row annular load-bearing members, and one side edge 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 edge 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 side edges of the annular support wheel 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 the 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 in 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 the 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 manufacturing steps of 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 to weave a plurality of the wires in pairs to form a circular mesh, wherein the plurality of 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, and cannot slide relative to each other if the contact point is located on both sides of the circular mesh;

[0018] Put the circular woven mesh into the 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 a phase transition point of the annular mesh, and the temperature is kept for 10 to 30 minutes to allow the annular mesh to be shaped, thereby obtaining the woven 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 the 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 1mm-5mm.

[0023] In the shape memory alloy-based manned lunar rover double-row wire mesh wheel described in the 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 the 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 supporting 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 of the wheel and the recoverable deformation capacity 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 that the traditional pneumatic wheel has a limited load-bearing capacity, resulting in overload use that affects 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 mounted 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 marked 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 creative work. Among them:

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

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

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

[0031] Figure 4 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, so as to solve the technical problems in the prior art that the material performance of the tire of a traditional pneumatic wheel will be greatly attenuated after being affected by space radiation and temperature changes, thus affecting the performance of the wheel, and the tire of the traditional pneumatic wheel may be punctured or under-inflated, thus affecting the safety performance of the wheel; the technical problem that the traditional pneumatic wheel can withstand a small amount of deformation, so it will be greatly deformed and permanently damaged when impacted, thus affecting the safety performance of the wheel; the technical problem that the load-bearing capacity of the traditional pneumatic wheel is limited, so long-term excessive load will affect the service life of the wheel; and the technical problem that the tire of the traditional pneumatic wheel is usually an integrated structure, so when any side is damaged, it will render it unusable.

[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 plurality 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, affecting the performance of the wheel, and the rubber tire is punctured or insufficiently inflated, 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 capacity, thereby solving the technical problems in the prior art that the traditional inflatable wheel can withstand a small deformation, resulting in permanent damage to the wheel when subjected to a huge impact, and that the traditional inflatable wheel has a limited load-bearing capacity, resulting in overload use that affects the service life of the wheel; finally The wheel hub is a center wheel hub and a center wheel hub of the embodiment of the present invention, wherein the wheel hub is a center wheel hub and a center wheel hub are connected to the wheel hub of the embodiment of the present invention.

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

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

[0042] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can 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 supporting rim 2, a double-row annular load-bearing member and a woven mesh wheel 3.

[0044] The center hub 1 is in an annular shape as a whole, and has a structure in which the center hub 1 is high on both sides in the width direction of its 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 in a circular ring shape 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 in the middle concave part of the center hub 1, and the annular support rim 2 is fixedly connected to the center hub 1 by screws. The annular support rim 2 divides the rim of the center 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 side of the annular support rim 2 close to the first annular load-bearing member 4 far 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 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 .

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

[0055] The woven mesh wheel 3 is in the shape of a ring, and is formed by a plurality of 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 parts, and one 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.

[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 in sequence along the radius direction 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 in sequence along the radius direction 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 weaving 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 annular load-bearing member. Specifically, screws are used to penetrate the weaving mesh wheel 3, the double-row annular load-bearing member and the two side edges of the annular support rim 2 from the outside to the inside in the radial direction of the annular support rim 2, so that the three are fixedly connected, wherein the screws pass through the "mesh" of the weaving mesh wheel 3 and press the wire material onto the double-row annular load-bearing member.

[0058] Among them, in other embodiments, the portion 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 member and the braided mesh wheel 3 together by 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 supporting 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 spring plates connected end to end, in a circular ring shape, and the two load-bearing spring plates connected to each other 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 plates that are not connected to other load-bearing spring plates, the side close to the annular support rim 2 is connected to one of the side edges 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, then bends toward the center hub 1 and is connected to the side edge of the center hub 1.

[0064] In some embodiments, the outer surface of the weaving mesh wheel 3 is a concave shape with a depression in the middle and convexities on both sides. The depression of the weaving mesh wheel 3 corresponds to the annular support rim 2, and the convexities on both 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 cavity 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 cavity 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 cavity 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 cavity 8 is deformed, thereby improving the load-bearing and impact resistance of the double-row wire mesh wheel; the fourth buffer cavity 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 cavity 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. Forming a plurality of wires by a metal drawing process using a shape memory alloy;

[0068] b. Using a braiding machine to weave a plurality of wires in pairs to form a circular mesh, wherein the plurality of 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, and cannot slide relative to each other if the contact point is located on both sides of the circular mesh;

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

[0070] d. Heat the mold and the annular mesh together to the temperature of the phase transition point of the annular mesh, 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, the two are fixedly connected.

[0072] Among them, the two wires that are in contact with each other can slide relative to each other if the contact point is located inside the circular ring-shaped mesh, and cannot slide relative to each other if the contact point is located on both sides of the circular ring-shaped mesh. The wires 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 wires whose contact points are located on both sides of the circular ring-shaped 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] Among them, the temperature range of the phase change point of the circular ring-shaped mesh is 300 degrees to 400 degrees. Further, the temperature of the phase change point of the circular ring-shaped mesh can be 350 degrees, and the insulation time can be 25 minutes.

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

[0075] In some embodiments, the angle between two filaments in contact with each other is 90 degrees.

[0076] Among them, the angle between the two wires in contact with each other is 90 degrees. When the two wires slide relatively, the sliding ability of any one of the wires 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 parallel and adjacent 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 may be made of 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 subjected 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 supporting 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 of the wheel and the 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 that 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, and the braided mesh wheel 3 is sleeved on the central hub 1 On the upper side, it wraps around the annular support wheel rim 2 and the double-row annular load-bearing parts, and one 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 wheel 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 wheel hub 1. The woven mesh wheel 3 is fixedly connected to the two side edges of the annular support wheel 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 wheel of the manned lunar rover based on shape memory alloy provided in the embodiment 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 solution and its core idea 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 replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions 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 wheel rim is fixedly sleeved on the central wheel hub along the circumferential direction of the central wheel hub and is located in the middle area of ​​the central wheel hub. The material of the annular support wheel rim is shape memory alloy; The double-row annular load-bearing member comprises a first annular load-bearing member and a second annular load-bearing member, wherein the material of the first annular load-bearing member and the second annular load-bearing member are both shape memory alloy; The first annular load-bearing member is fixedly sleeved on one of the outer peripheral sides of the central hub, the first annular load-bearing member is fixedly connected to the annular support rim on one side close to the annular support rim, and is fixedly connected to the central hub on the other side away from the annular support rim; 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 a plurality of wires woven together in pairs. The wires are made of shape memory alloy. The woven mesh wheel is sleeved on the central hub, wrapping the annular support wheel rim and the double-row annular load-bearing members, and one side edge 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 edge 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 side edges of the annular support wheel 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 as claimed in 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 as claimed in 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 spring sheets connected end to end, and are in a circular ring shape. The two load-bearing spring 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 as claimed in claim 1, characterized in that: The outer surface of the weaving mesh wheel is a concave shape with a depression in the middle and protrusions on both sides. The depression of the weaving mesh wheel corresponds to the annular supporting wheel rim, and the protrusions 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 as claimed in claim 1, characterized in that: The manufacturing steps of 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 to weave a plurality of the wires in pairs to form a circular mesh, wherein the plurality of 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, and cannot slide relative to each other if the contact point is located on both sides of the circular mesh; Put the circular woven mesh into the mold so that the circular woven mesh completely fits the mold; The mold and the annular mesh are heated together to a temperature of a phase transition point of the annular mesh, and the temperature is kept for 10 to 30 minutes to allow the annular mesh to be shaped, thereby obtaining the woven mesh wheel.

6. The double-row wire mesh wheel of the manned lunar rover based on shape memory alloy as claimed in 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 as claimed in claim 5, characterized in that: 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.

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

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

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