Lightweight wheel and non-pneumatic wheel assembly

Abstract

This invention discloses a lightweight wheel and a non-pneumatic wheel assembly, belonging to the field of tire technology. The lightweight wheel includes a connecting disc and multiple spokes. This invention arranges the spokes, including spoke portions and support portions, circumferentially and evenly on the inner side of the connecting disc with the center as the center. The support portions circumferentially form a rim, while the spoke portions are fan-shaped and radially fixed to the connecting disc, ensuring the wheel's support strength. This invention achieves wheel lightweighting and material reduction by creating a first weight-reduction hole in the spoke portion. Furthermore, because the spokes of this invention function as both spokes and rims, it reduces the number of component types, thereby lowering the difficulty of wheel processing and improving processing efficiency. This not only simplifies the small-batch development and processing of wheels and reduces R&D costs, but also eliminates the need for expensive, large-size molds for mass production, thus simplifying mold development, reducing manufacturing costs, and shortening the manufacturing cycle during mass production.

Description

Technical Field

[0001] This invention relates to the field of tire technology, and more particularly to lightweight wheels and non-pneumatic wheel assemblies. Background Technology

[0002] Non-pneumatic tires offer a range of advantages, including run-flat capability, maintenance-free operation, and high safety performance. They also provide significant design and material design flexibility, making them a key future direction for the tire industry. Non-pneumatic tires are assemblies that utilize an elastic support structure to meet vehicle usage requirements, eliminating the need for tire pressure maintenance. They include the wheel rim and are used in automobiles, construction machinery, agricultural machinery, industrial vehicles, motorcycles, rickshaws, and other vehicles, offering overall performance comparable to or even superior to pneumatic tires. For example, Chinese patent document CN113246661A discloses a non-pneumatic tire that simultaneously possesses good load-bearing capacity and elastic vibration damping performance. Chinese patent document CN118306134A discloses a non-pneumatic tire whose overall structure combines low rolling resistance, good cushioning and shock absorption performance, high load-bearing capacity, and long fatigue life. Furthermore, Chinese patent document CN114393956A discloses a non-pneumatic tire with adjustable stiffness, capable of adjusting different rotation angles or positions for different working conditions to achieve optimal stiffness. It can also further enhance stiffness to compensate for stiffness loss due to permanent deformation, significantly improving tire performance and service life.

[0003] For traditional pneumatic tires, the rim is the component of the wheel that contacts the tire carcass, ensuring the tire's airtightness. However, to avoid bead lock failure and reduce the risk of air leakage, existing pneumatic tire rims have complex shapes and structures, requiring high rigidity. The rim and flange cannot deform, making lightweight improvements to the wheel, including the rim itself, difficult. For non-pneumatic tires, since they do not require inflation, they do not need complex rim lock structures to ensure airtightness. Therefore, non-pneumatic tire rims offer greater potential for design improvements and weight reduction.

[0004] To reduce wheel weight, Chinese patent document CN208180651U discloses a wheel hub for new energy vehicles based on weight-reducing grooves. This wheel hub achieves weight reduction by setting weight-reducing through holes on the spokes and weight-reducing grooves on the rim. However, the lightweight wheel hub structure disclosed above is still relatively complex and has many components, which increases the processing cost and difficulty of the wheel hub and wheel. Summary of the Invention

[0005] The purpose of this invention is to provide a lightweight wheel and a non-pneumatic wheel assembly, which aims to solve the problem that existing lightweight wheel hubs and wheels are still relatively complex and have many types of parts, which increases the processing cost and difficulty.

[0006] To achieve the above objectives, the first aspect of the present invention provides a lightweight wheel, including a connecting disc; and further including spokes; the spokes are inverted L-shaped, and are evenly arranged circumferentially on the inner side of the connecting disc with a radius of R1 centered on the center of the connecting disc; the spokes include a spoke portion and a support portion connected to the spoke portion; the support portions are arranged circumferentially to form a rim; the spoke portion is fan-shaped, and a first weight-reducing hole is provided on the spoke portion; the spoke portion arranged radially along the rim is fixedly mounted on the connecting disc.

[0007] Optionally, the length direction of the first weight-reducing hole is parallel to the radial direction of the wheel rim, and the first weight-reducing hole is narrower at the bottom and wider at the top.

[0008] Optionally, the connecting plate has a plurality of fixing holes evenly distributed circumferentially with the center of the connecting plate as the center and a radius of R1; the spoke portion extends downward to form a fixing portion; the fixing portion is provided with a connecting through hole with an inner diameter consistent with the inner diameter of the fixing hole; threaded connectors pass through both the fixing hole and the connecting through hole; a first reinforcing protrusion is formed on the inner side of the spoke portion.

[0009] Optionally, the spoke component further includes an arc-shaped bend for connecting the spoke portion and the support portion; the outer side of the arc-shaped bend has an arc-shaped surface that connects with the surface of the spoke portion and the surface of the support portion, and the inner side of the arc-shaped bend has a second reinforcing protrusion.

[0010] Optionally, a U-shaped weight-reducing groove or a second weight-reducing hole is provided on the support part along the length direction of the support part, and the groove opening of the U-shaped weight-reducing groove is located at the end of the support part.

[0011] Optionally, the inner width of the U-shaped weight-reducing groove is less than or equal to 60% of the width of the support part; the inner width of the second weight-reducing hole is less than or equal to 60% of the width of the support part.

[0012] Optionally, the end of the support portion is formed with a connecting protrusion downwards, and the connecting protrusion is provided with an embedding portion and a groove on both sides in the width direction of the support portion; the embedding portion is embedded in the groove; two adjacent support portions are connected together through the embedding portion.

[0013] Optionally, the embedding part is a curved columnar embedding part, and the center line of the embedding part is an arc-shaped center line; the connecting protrusion has an opening on the side opposite to the spoke part, and the opening is connected to the groove.

[0014] Optionally, the included angle between the spoke portion and the support portion is α, and the value of the included angle α is in the range of 125°≥α≥60°.

[0015] A second aspect of the present invention provides a non-pneumatic wheel assembly, comprising a non-pneumatic tire and the lightweight wheel described above.

[0016] The beneficial effects of this invention are:

[0017] The first aspect of this invention provides a lightweight wheel. By designing a spoke component with a spoke portion and a support portion, and arranging the spoke components evenly around the center of the connecting disc and fixing them to the inner side of the connecting disc, the support portion of the spoke components is arranged circumferentially to form a rim. This eliminates the need for an additional complex rim locking structure, greatly simplifying the overall structure of the wheel. Furthermore, the spoke portion of the spoke component is fan-shaped and fixed to the connecting disc radially along the rim, ensuring the support strength of the wheel while effectively achieving wheel lightweighting and reducing material usage through the provision of a first weight-reducing hole.

[0018] Because the spokes of this invention simultaneously serve the functions of supporting and transmitting force, and multiple spokes arranged circumferentially can form a rim, the types of accessories provided by this invention can be reduced compared to existing lightweight wheel hubs and wheels. This reduces the difficulty of wheel processing and increases efficiency. As a result, it not only simplifies the processing methods in the small-batch development and sample development stages of wheels and reduces R&D costs, but also eliminates the need for expensive large-size manufacturing molds in mass production, thus simplifying the difficulty of mold development, manufacturing costs, and manufacturing cycle.

[0019] The second aspect of the present invention provides a non-pneumatic wheel assembly, including a non-pneumatic tire and the aforementioned lightweight wheel. The non-pneumatic wheel assembly provided by the present invention has the advantages of run-flat tires and maintenance-free tire pressure, while also achieving overall lightweighting, which can improve the driving comfort and driving range of the vehicle. Attached Figure Description

[0020] Figure 1 This is a perspective view of the spoke component of the first structural form provided by the present invention.

[0021] Figure 2 It is equipped with Figure 1 A three-dimensional view of a wheel with spokes.

[0022] Figure 3 It is equipped with Figure 1 Front view of the wheel with spokes.

[0023] Figure 4 This is a side view of the spoke component of the first structural form provided by the present invention.

[0024] Figure 5 This is a front view of the spoke component of the first structural form provided by the present invention.

[0025] Figure 6 This is a perspective view of the spoke component of the second structural form provided by the present invention.

[0026] Figure 7 It is equipped with Figure 6 A three-dimensional view of a wheel with spokes.

[0027] Figure 8 This is a perspective view of the spoke component of the third structural form provided by the present invention.

[0028] Figure 9 This is a side view of the spoke component of the third structural form provided by the present invention.

[0029] Figure 10 yes Figure 9 Cross-sectional view along the AA direction.

[0030] Figure 11 It is equipped with Figure 8 A three-dimensional view of a wheel with spokes.

[0031] Figure 12 It is equipped with Figure 8 Front view of the wheel with spokes.

[0032] Figure 13 It is equipped with Figure 8 Side view of a wheel with spokes.

[0033] Figure 14 yes Figure 13 Cross-sectional view along the DD direction.

[0034] Figure 15 This is a perspective view of the non-pneumatic wheel assembly provided by the present invention.

[0035] Figure 16 A front view of the non-pneumatic wheel assembly provided by the present invention.

[0036] Figure 17 yes Figure 16 Cross-sectional view along the EE direction.

[0037] Figure 18 This is a side view of the non-pneumatic wheel assembly provided by the present invention.

[0038] Figure label:

[0039] 1-Connecting plate; 101-Fixing hole; 102-Center hole; 103-PCD hole;

[0040] 2-Spindle component; 201-Spindle portion; 2011-First weight-reducing hole; 202-Support portion; 2021-U-shaped weight-reducing groove; 2022-Second weight-reducing hole; 203-Fixing portion; 2031-Connecting through hole; 204-Arc-shaped bending portion; 2041-Arc-shaped surface; 205-First reinforcing protrusion; 206-Second reinforcing protrusion; 207-Connecting protrusion; 2071-Groove; 2072-Opening; 208-Embedding portion; 209-Connecting portion;

[0041] 3-Rim; 4-Non-pneumatic tire. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1 to 5 The first aspect of the present invention provides a lightweight wheel, which includes a connecting disc 1 and a plurality of spokes 2. The spokes 2 are inverted L-shaped and are evenly arranged circumferentially with a radius of R1 around the center of the connecting disc 1. The spokes 2 include spoke portions 201 and support portions 202 connected to the spoke portions 201; when the spokes 2 are evenly arranged circumferentially around the connecting disc 1 with a radius of R1, the support portions 202 form a rim 3; the spoke portions 201 are fan-shaped and have first weight-reducing holes 2011, and the spoke portions 201 arranged radially along the rim 3 are fixedly mounted on the connecting disc 1.

[0044] In the lightweight wheel provided by this invention, the spokes 2 are designed in an inverted L-shape and are evenly arranged circumferentially on the inner side of the connecting disc 1 with the center of the disc as the center. The support portion 202 of the spokes 2 forms the rim 3 through circumferential arrangement, eliminating the need for an additional complex rim locking ring structure and greatly simplifying the overall structure of the wheel. The spoke portion 201 of the spokes 2 is fan-shaped and radially fixed to the connecting disc 1 along the rim 3, which not only ensures the supporting strength of the wheel, but also effectively achieves the lightweighting of the wheel by setting the first weight-reducing hole 2011, reducing the use of materials.

[0045] Since the spoke component 2 of this invention simultaneously serves the functions of supporting the spokes and transmitting force, and multiple spoke components 2 arranged circumferentially can form a rim 3, compared with the types of accessories for existing lightweight wheel hubs and wheels, the types of lightweight wheel accessories provided by this invention can be reduced, the wheel processing difficulty is reduced, and the efficiency is high. This not only simplifies the processing method in the small-batch development and sample development stage of wheels and reduces R&D costs, but also eliminates the need to use expensive large-size molds in mass production, which can simplify the difficulty of mold development, manufacturing costs, and manufacturing cycle.

[0046] Compared to mass-produced non-pneumatic tire wheels of the same model, the wheel provided by this invention can achieve a weight reduction of 15-25%. When machining non-pneumatic and pneumatic tire wheels in small batches, the rod-shaped blanks required for machining need to retain a relatively thick dimension to avoid problems such as machining vibration and damage to the thin-walled components that make up the wheel. Therefore, wheels produced by small-batch machining are relatively heavy. The wheel provided by this invention, compared to wheels produced by small-batch machining, is significantly lighter. This not only reduces the overall weight of the wheel but also significantly reduces the unsprung mass of the vehicle, thereby reducing rolling resistance and improving driving comfort and driving range.

[0047] Specifically, when installing a non-pneumatic tire carcass on the lightweight wheel provided by this invention, the fixed connection between the carcass and the support portion 202 of the spoke 2 adopts a combination of chemical bonding and physical connection. Through the chemical properties of the adhesive, the inner buffer layer or support of the carcass can be tightly bonded to the support portion 202; while by using the physical method of wrapping the support portion 202 with the inner buffer layer of the carcass, allowing the support portion 202 to be embedded in the inner buffer layer, the connection between the support portion 202 and the non-pneumatic tire carcass can be further strengthened, preventing relative displacement between the carcass and the wheel during vehicle operation.

[0048] Specifically, the connecting disc 1 has a central hole 102 at its center, and multiple PCD (pitch circle diameter) holes are distributed circumferentially on the connecting disc 1 with the center of the connecting disc 1 as the center and with a radius of R2, where R2 is smaller than R1. The wheel can be connected to the axle as a whole through the PCD holes 103.

[0049] like Figures 1 to 3As shown, in an optional embodiment, the length direction of the first weight-reducing hole 2011 is parallel to the radial direction of the rim 3, and the first weight-reducing hole 2011 is narrower at the bottom and wider at the top. Here, "bottom" refers to the side of the first weight-reducing hole 2011 closest to the central hole 102 of the connecting plate 1. The length direction of the first weight-reducing hole 2011 is parallel to the radial direction of the rim 3, thus utilizing the length of the spoke portion 201 to achieve a larger hollow area, reducing material usage and achieving maximum weight reduction. Furthermore, since the spoke portion 201 is fan-shaped, narrower on the side closest to the central hole 102 of the connecting plate 1 and wider on the side farther from the central hole 102, this embodiment adopts a design where the first weight-reducing hole 2011 is narrower at the bottom and wider at the top. This design achieves weight reduction for the spoke component 2 while avoiding excessive material reduction in the spoke portion 201, thereby ensuring sufficient support strength for the spoke component 2.

[0050] like Figure 2 and Figure 3 As shown, in an optional embodiment, the connecting disc 1 has a plurality of fixing holes 101 evenly distributed circumferentially around its center with a radius of R1; the spoke portion 201 extends downward to form a fixing portion 203; the fixing portion 203 has a connecting through hole 2031 with an inner diameter consistent with the inner diameter of the fixing hole 101; threaded connectors, which can be fixing bolts, pass through both the fixing hole 101 and the connecting through hole 2031. Using the threaded connectors and the fixing portion 203, the spoke portion 2 can be securely connected to the connecting disc 1, ensuring the reliability of the connection between the spoke portion 2 and the connecting disc 1. This connection method also facilitates the assembly, disassembly, and subsequent maintenance and replacement of the wheel, improving the flexibility and convenience during wheel processing and use.

[0051] When the vehicle is in motion, the spoke portion 201 of the wheel spoke component 2 must bear the vertical gravity from the vehicle body, and also cope with the impact force generated by road bumps, as well as the force exerted during vehicle acceleration or braking. Therefore, in order to better distribute and transmit these complex external forces and prevent the spoke portion 201 from deforming or being damaged due to excessive local stress, such as... Figure 1 and Figure 4 As shown, in an optional embodiment, a first reinforcing protrusion 205 is formed on the inner side of the spoke portion 201. The first reinforcing protrusion 205 enhances the support strength of the spoke portion 201, ensuring the overall load-bearing capacity of the spoke component 2, thereby ensuring vehicle driving safety.

[0052] like Figure 4 As shown, the first reinforcing protrusion 205 is thicker in the middle and narrower on both sides, which can meet the lightweight requirements of the spoke 2 and the wheel, while also ensuring the support strength of the spoke 201.

[0053] like Figure 1 and Figure 4 As shown, in an optional embodiment, the spoke component 2 further includes an arc-shaped bend 204 for connecting the spoke portion 201 and the support portion 202; the outer side of the arc-shaped bend 204 has an arc-shaped surface 2041 that connects with the surfaces of the spoke portion 201 and the support portion 202. The arc-shaped surface 2041 smoothly connects with the surfaces of the spoke portion 201 and the support portion 202, which can reduce the concentration of stress at the connection between the spoke portion 201 and the support portion 202, reduce local stress peaks, thereby reducing the risk of fatigue cracks or deformation caused by long-term stress at the connection between the spoke portion 201 and the support portion 202. Under the premise of ensuring the structural strength and stability of the wheel, the service life of the spoke component 2 can be extended, and a more reliable structural foundation can be provided for the lightweight design of the wheel, ensuring that the overall load-bearing performance of the wheel is not affected while reducing the weight of the wheel.

[0054] In order to further reduce stress concentration at the connection between the spoke portion 201 and the support portion 202, a second reinforcing protrusion 206 is formed on the inner side of the arc-shaped bending portion 204. The second reinforcing protrusion 206 is thicker in the middle and narrower on both sides, which can reduce stress concentration while meeting the lightweight requirements of the spoke portion 2 and the wheel.

[0055] In an optional embodiment, a U-shaped weight-reducing groove 2021 or a second weight-reducing hole 2022 is formed on the support portion 202 along its length. Without affecting the supporting strength of the support portion 202, by adopting a weight-reducing design for the support portion 202, the amount of material used in the wheel spoke 2 can be further reduced, achieving lightweighting of the wheel spoke 2 and the wheel, thereby reducing the overall weight of the wheel and the vehicle's driving performance. Figure 1 , Figure 4 as well as Figure 5 As shown, in the first structural form of the spoke component 2 provided by the present invention, the support part 202 is provided with a U-shaped weight reduction groove 2021, and the groove opening of the U-shaped weight reduction groove 2021 is located at the end of the support part 202.

[0056] like Figure 6 As shown, the present invention provides a second type of spoke component 2, wherein a second weight-reducing hole 2022 is disposed on the support portion 202 of the spoke component 2. Compared with the first type of spoke component 2 provided by the present invention, the support portion 202 of the second type of spoke component 2 is provided with a connecting portion 209 at its end, resulting in higher support strength and enabling the lightweight wheel to be suitable for heavy-duty scenarios.

[0057] In an optional embodiment, the U-shaped weight-reducing groove 2021 is a weight-reducing groove with a fixed inner width, and the inner width of the U-shaped weight-reducing groove 2021 is less than or equal to 60% of the width of the support part 202; the second weight-reducing hole 2022 is a weight-reducing hole with a fixed inner width, and the inner width of the second weight-reducing hole 2022 is less than or equal to 60% of the width of the support part 202, thereby ensuring the support strength of the support part 202 while satisfying the weight reduction of the spoke part 2.

[0058] like Figures 8 to 14 As shown, the present invention also provides a third type of spoke component 2. In this type of spoke component 2, a connecting protrusion 207 is formed downward at the end of the support portion 202. The connecting protrusion 207 is provided with an embedding portion 208 and a groove 2071 on both sides of the support portion 202 in the width direction. The embedding portion 208 is embedded in the groove 2071. Two adjacent support portions 202 are stably connected together by the embedding portion 208, thereby enhancing the rigidity and strength of the rim 3 formed by the circumferential arrangement of the support portions 202, further ensuring the stability and durability of the rim 3 during the load-bearing process, so that the lightweight wheel provided by the present invention can be applied to more heavy-load scenarios.

[0059] like Figure 9 and Figure 10 As shown, in an optional embodiment, the embedding part 208 is a curved columnar embedding part 208, and the center line of the embedding part 208 is an arc-shaped center line BC, which is parallel to the outer peripheral surface of the connecting disk 1; the connecting protrusion 207 is provided with an opening 2072 on the side opposite to the spoke part 201, and the opening 2072 is connected to the groove 2071. In this embodiment, the embedded part 208 is designed as a curved column with its arc-shaped center line BC parallel to the outer circumferential surface of the connecting plate 1. This allows the connection of adjacent support parts 202 to better fit the circumferential curvature of the rim 3, ensuring uniform force distribution at the connection of adjacent support parts 202, avoiding local stress concentration, and enhancing the overall structural stability of the rim 3. The connecting protrusion 207 has an opening 2072 on the side facing away from the spoke part 201 that communicates with the groove 2071. This facilitates the quick and accurate insertion of the embedded part 208 into the groove 2071, simplifying the disassembly and assembly process. It also provides a certain adjustment space for the installation of the embedded part 208, ensuring the tightness of the connection between adjacent support parts 202, and further improving the rigidity and strength of the rim 3.

[0060] like Figure 4As shown, in an optional embodiment, the included angle between the spoke portion 201 and the support portion is α, and the value of the included angle α is in the range of 125°≥α≥60°. This can better adapt to the needs of different ET offsets (hub offset, i.e., the distance between the center line of the rim 3 and the mounting surface of the connecting plate 1), so that the lightweight wheel can adapt to the installation requirements of more different vehicle models or usage scenarios, improving the versatility and applicability of the wheel. At the same time, within this angle range, the connection between the spoke portion 201 and the support portion 202 can better disperse and transmit various forces generated during vehicle operation, such as the vertical gravity of the vehicle body, the impact force of road bumps, and the force when the vehicle accelerates or brakes. This can avoid stress concentration at the connection between the spoke portion 201 and the support portion 202 due to excessively large or small angles, ensuring the overall structural strength and stability of the spoke component 2, thereby ensuring the load-bearing capacity and service life of the lightweight wheel, and achieving wheel lightweighting without affecting its normal performance.

[0061] like Figures 15 to 18 As shown, the second aspect of the present invention provides a non-pneumatic wheel assembly, including a non-pneumatic tire 4 and the lightweight wheel described above. The non-pneumatic wheel assembly provided by the present invention has the advantages of run-flat tires and maintenance-free tire pressure, while also achieving overall lightweighting, which can improve the driving comfort and driving range of the vehicle.

[0062] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A lightweight wheel, including a connecting disc (1); characterized in that, It also includes an inverted L-shaped spoke component (2); the spoke component (2) is evenly arranged circumferentially on the inner side of the connecting disk (1) with the center of the connecting disk (1) as the center, and the spoke component (2) includes a spoke portion (201) and a support portion (202) connected to the spoke portion (201); the support portion (202) is arranged circumferentially to form a rim (3); the spoke portion (201) is fan-shaped, and the spoke portion (201) is provided with a first weight-reducing hole (2011), along the rim (3) The spoke portion (201) arranged radially is fixedly mounted on the connecting plate (1); the end of the support portion (202) is formed with a connecting protrusion (207) downward, and the connecting protrusion (207) is provided with an embedding portion (208) and a groove (2071) on both sides of the support portion (202) in the width direction; the embedding portion (208) is embedded in the groove (2071); two adjacent support portions (202) are connected together through the embedding portion (208).

2. The lightweight wheel according to claim 1, characterized in that, The length direction of the first weight reduction hole (2011) is parallel to the radial direction of the rim (3), and the first weight reduction hole (2011) is narrower at the bottom and wider at the top.

3. The lightweight wheel according to claim 1, characterized in that, The connecting disc (1) has a plurality of fixing holes (101) evenly distributed along the circumference of the connecting disc (1) with a radius of R1; the spoke portion (201) extends downward to form a fixing portion (203); the fixing portion (203) is provided with a connecting through hole (2031) with an inner diameter consistent with the inner diameter of the fixing hole (101); threaded connectors are simultaneously passed through the fixing hole (101) and the connecting through hole (2031); a first reinforcing protrusion (205) is formed on the inner side of the spoke portion (201).

4. The lightweight wheel according to claim 1, characterized in that, The spoke component (2) further includes an arc-shaped bend (204) for connecting the spoke portion (201) and the support portion (202); the outer side of the arc-shaped bend (204) has an arc-shaped surface (2041) that connects with the surface of the spoke portion (201) and the surface of the support portion (202), and a second reinforcing protrusion (206) is formed on the inner side of the arc-shaped bend (204).

5. The lightweight wheel according to claim 1, characterized in that, The support part (202) is provided with a U-shaped weight reduction groove (2021) or a second weight reduction hole (2022) along the length direction of the support part (202), and the groove opening of the U-shaped weight reduction groove (2021) is located at the end of the support part (202).

6. The lightweight wheel according to claim 5, characterized in that, The inner width of the U-shaped weight-reducing groove (2021) is less than or equal to 60% of the width of the support part (202); the inner width of the second weight-reducing hole (2022) is less than or equal to 60% of the width of the support part (202).

7. The lightweight wheel according to claim 1, characterized in that, The embedded part (208) is a curved columnar embedded part, and the center line of the embedded part (208) is an arc-shaped center line; the connecting protrusion (207) has an opening (2072) on the side opposite to the spoke part (201), and the opening (2072) and the groove (2071) are connected.

8. The lightweight wheel according to claim 1, characterized in that, The included angle between the spoke portion (201) and the support portion (202) is α, and the value of the included angle α is in the range of 125°≥α≥60°.

9. A non-pneumatic wheel assembly, characterized in that, Including non-pneumatic tires (4) and lightweight wheels as described in any one of claims 1-8.

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