Lightweight wheel and non-inflatable wheel assembly

Abstract

The invention discloses a light-weight wheel and a non-inflatable wheel assembly, and belongs to the technical field of tires, and the light-weight wheel comprises a connecting disc and a plurality of spoke pieces. The spoke pieces with the spoke parts and the supporting parts are evenly distributed on the inner side of the connecting disc in the circumferential direction with the center of the connecting disc as the circle center, the supporting parts are distributed in the circumferential direction to form the rim, the spoke parts are fixed to the connecting disc in the radial direction of the rim in the fan shape, and the supporting strength of the wheel is guaranteed. The first lightening holes are formed in the spoke part, so that the weight of the wheel is reduced, materials are reduced, the spoke piece has the spoke function and can form a rim, and therefore the types of accessories can be reduced, the machining difficulty of the wheel is lowered, and the machining efficiency is improved; therefore, the small-batch development and processing mode of the wheels can be simplified, the research and development cost is reduced, and expensive large-size molds are not needed for large-batch production of the wheels, so that the mold development difficulty, the manufacturing cost and the manufacturing period during large-batch production can be simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of tires, and in particular to a lightweight wheel and a non-pneumatic wheel assembly. Background Art

[0002] Non-pneumatic tires offer a range of advantages, including run-flat resistance, no air pressure maintenance, and superior safety. They also offer significant design and material flexibility, making them a key future development direction for the tire industry. These tires utilize an elastic support structure to meet vehicle requirements, require no air pressure maintenance device, and are assembled into wheels. These tires are designed for use 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 publication No. CN113246661A discloses a non-pneumatic tire that has both good load-bearing performance and elastic vibration damping performance. Chinese patent publication No. CN118306134A discloses a non-pneumatic tire whose overall structure combines advantages such as low rolling resistance, good cushioning and shock-absorbing performance, high load-bearing capacity, and long fatigue life. Chinese patent publication No. CN114393956A discloses a non-pneumatic tire with adjustable stiffness, which can adjust different rotation angles or positions according to different working conditions to achieve the optimal stiffness effect of the non-pneumatic tire, and can further increase the stiffness to compensate for the stiffness loss due to permanent deformation, thereby greatly improving the tire's driving performance and service life.

[0003] For traditional pneumatic tires, the rim is the component of the wheel that contacts the tire carcass and ensures the tire's airtightness. However, to prevent bead lock failure and reduce the risk of deflation, existing pneumatic tire rims have complex shapes and structures, high rigidity requirements, and deformation-resistant rims and flanges. This makes lightweighting the wheel, including the rim, difficult. Non-pneumatic tires, on the other hand, do not require a complex rim lock structure to ensure the tire carcass' airtightness, thus offering significant potential for design and lightweighting improvements.

[0004] To reduce wheel weight, Chinese patent publication CN208180651U discloses a wheel hub for new energy vehicles based on weight-reducing grooves. This wheel hub achieves lightweighting by providing weight-reducing through-holes in the spokes and weight-reducing grooves in the rim. However, the lightweight wheel hub structure disclosed above is still relatively complex, and the variety of components increases the cost and difficulty of manufacturing the hub and wheel. Summary of the Invention

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

[0006] To achieve the above-mentioned purpose, the first aspect of the present invention provides a lightweight wheel, including a connecting disk; and also including a spoke member; the spoke member is in an inverted L-shape, and the spoke member is evenly arranged on the inner side of the connecting disk along a circumferential direction with the center of the connecting disk as the center and a radius R1, and the spoke member includes a spoke portion and a support portion connected to the spoke portion; the support portion is arranged circumferentially to form a rim; the spoke portion is fan-shaped, and a first weight-reducing hole is provided on the spoke portion, and the spoke portion arranged along the radial direction of the rim is fixedly mounted on the connecting disk.

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

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

[0009] Optionally, the spoke member further includes an arcuate bending portion for connecting the spoke portion and the support portion; the outer side of the arcuate bending portion has an arcuate surface connected to the surface of the spoke portion and the surface of the support portion, and the inner side of the arcuate bending portion is formed with a second reinforcing protrusion.

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

[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 portion; the inner width of the second weight-reducing hole is less than or equal to 60% of the width of the support portion.

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

[0013] Optionally, the embedded portion is a curved columnar embedded portion, and the center line of the embedded portion is an arc-shaped center line; the connecting protrusion is provided with an opening on the side facing away from the spoke portion, and the opening is connected to the embedding groove.

[0014] Optionally, the angle between the spoke portion and the support portion is α, and the value range of the angle α is 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 the present invention are: The first aspect of the present invention provides a lightweight wheel, which is achieved by designing a spoke member with a spoke portion and a support portion, and making the spoke member evenly arranged circumferentially with the center of the connecting disk as the center of the circle and fixed to the inner side of the connecting disk, so that the support portion of the spoke member is circumferentially arranged to form a rim, without the need to additionally set up a complex rim lock ring structure, thereby greatly simplifying the overall structure of the wheel; the spoke portion of the spoke member is fan-shaped and fixed to the connecting disk along the radial direction of the rim, which not only ensures the supporting strength of the wheel, but also effectively realizes the lightweighting of the wheel by setting the first weight-reducing hole, thereby reducing material usage.

[0017] Since the spoke components of the present invention take into account the functions of spoke support and force transmission at the same time, and multiple spoke components are arranged circumferentially to form a rim, therefore, compared with the types of accessories of existing lightweight hubs and wheels, the types of accessories provided by the present invention can be reduced, the difficulty of wheel processing is reduced, and the efficiency is high, which not only simplifies the processing methods in the small-batch development and sample research and development stages of wheels and reduces research and development costs, but also eliminates the need to use expensive large-size manufacturing molds in mass production, which can simplify the difficulty of mold development, manufacturing costs and manufacturing cycles.

[0018] The second aspect of the present invention provides a non-pneumatic wheel assembly, including a non-pneumatic tire and the lightweight wheel described above. The non-pneumatic wheel assembly provided by the present invention not only has the advantages of explosion-proof tires and no air pressure maintenance, but also can achieve overall lightweight, which can improve the driving comfort and cruising range of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the spoke member of the first structural form provided by the present invention.

[0020] Figure 2 Is equipped with Figure 1 A perspective view of a wheel with spokes.

[0021] Figure 3 Is equipped with Figure 1 Front view of the wheel with spokes.

[0022] Figure 4 It is a side view of the spoke member of the first structural form provided by the present invention.

[0023] Figure 5 This is a front view of the spoke member of the first structural form provided by the present invention.

[0024] Figure 6It is a stereoscopic view of the spoke member of the second structural form provided by the present invention.

[0025] Figure 7 Is equipped with Figure 6 A perspective view of a wheel with spokes.

[0026] Figure 8 It is a three-dimensional diagram of the spoke member of the third structural form provided by the present invention.

[0027] Figure 9 It is a side view of the spoke member of the third structural form provided by the present invention.

[0028] Figure 10 yes Figure 9 Cross-section view in the AA direction.

[0029] Figure 11 Is equipped with Figure 8 A perspective view of a wheel with spokes.

[0030] Figure 12 Is equipped with Figure 8 Front view of the wheel with spokes.

[0031] Figure 13 Is equipped with Figure 8 Side view of a wheel with spokes.

[0032] Figure 14 yes Figure 13 Cross-section along the middle DD direction.

[0033] Figure 15 It is a three-dimensional diagram of the non-pneumatic wheel assembly provided by the present invention.

[0034] Figure 16 A front view of the non-pneumatic wheel assembly provided by the present invention.

[0035] Figure 17 yes Figure 16 Cross-section view in the EE direction.

[0036] Figure 18 It is a side view of the non-pneumatic wheel assembly provided by the present invention.

[0037] Reference numerals: 1-connection plate; 101-fixing hole; 102-center hole; 103-PCD hole; 2-spoke; 201-spoke 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 bent portion; 2041-arc-shaped surface; 205-first reinforcing protrusion; 206-second reinforcing protrusion; 207-connecting protrusion; 2071-embedded groove; 2072-opening; 208-embedded portion; 209-connecting portion; 3- wheel rim; 4- non-pneumatic tire. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] See also Figures 1 to 5 In a first aspect, the present invention provides a lightweight wheel comprising a connecting disc 1 and a plurality of spokes 2. The spokes 2 are in an inverted L-shape, and are arranged evenly on the inner side of the connecting disc 1 in a circumferential direction with a radius of R1, with the center of the connecting disc 1 as the center of the circle. The spokes 2 include a spoke portion 201 and a support portion 202 connected to the spoke portion 201; when the spokes 2 are evenly arranged on the inner side of the connecting disc 1 in a circumferential direction with a radius of R1, the support portion 202 is arranged circumferentially to form a rim 3; the spoke portion 201 is fan-shaped, and is provided with a first weight-reducing hole 2011. The spoke portion 201 arranged radially along the rim 3 is fixedly mounted on the connecting disc 1.

[0040] In the lightweight wheel provided by the present invention, the spokes 2 are designed in an inverted L-shape and are evenly arranged circumferentially inside the connecting disc 1, with the center of the circle as the center. The support portions 202 of the spokes 2 are circumferentially arranged to form the rim 3, eliminating the need for a complex rim locking ring structure and significantly simplifying the overall wheel structure. The spoke portions 201 of the spokes 2 are fan-shaped and fixed to the connecting disc 1 radially along the rim 3. This not only ensures the wheel's support strength, but also effectively achieves lightweighting through the provision of the first lightening holes 2011, reducing material usage.

[0041] Since the spoke member 2 of the present invention takes into account the functions of spoke support and force transmission at the same time, and multiple spoke members 2 are arranged circumferentially to form a rim 3, therefore, compared with the types of accessories of existing lightweight hubs and wheels, the types of lightweight wheel accessories provided by the present invention can be reduced, the difficulty of wheel processing is reduced, and the efficiency is high, which not only simplifies the processing methods in the small-batch development and sample research and development stages of wheels and reduces research and development 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 cycles.

[0042] Compared to mass-produced non-pneumatic tire wheels of the same model, the wheels provided by the present invention can achieve a weight reduction of 15-25%. However, when machining non-pneumatic and pneumatic tire wheels in small batches, the rod-shaped stock required for machining the wheels needs to be relatively thick to avoid jitter and damage to the thin-walled components that make up the wheel. Consequently, these wheels produced in small batches are heavier. Compared to these small-batch machined wheels, the wheels provided by the present invention are significantly lighter, resulting in not only overall wheel weight reduction but also a significant reduction in the vehicle's unsprung mass, thereby reducing rolling resistance and, in turn, improving driving comfort and range.

[0043] Specifically, when the non-pneumatic tire carcass is mounted on the lightweight wheel provided by the present invention, the carcass and the support portion 202 of the spoke member 2 are fixedly connected using a combination of chemical bonding and physical connection. The chemical properties of the adhesive allow the carcass' inner buffer layer or support to be tightly bonded to the support portion 202. Furthermore, the physical method of wrapping the support portion 202 within the carcass' inner buffer layer and embedding the support portion 202 within the inner buffer layer further strengthens the connection between the support portion 202 and the non-pneumatic tire carcass, preventing relative displacement between the carcass and the wheel during driving.

[0044] Specifically, the connection plate 1 has a central hole 102 at its center. Multiple PCD (pitch diameter) holes are distributed around the connection plate 1, with a radius R2 smaller than R1, centered around the center of the connection plate 1. PCD holes 103 connect the entire wheel to the axle.

[0045] like Figures 1 to 3As shown, in an optional embodiment, the length of the first lightening hole 2011 is parallel to the radial direction of the rim 3, and the first lightening hole 2011 is narrow at the bottom and wide at the top. The "bottom" here refers to the side of the first lightening hole 2011 closest to the center hole 102 of the connecting disc 1. The length of the first lightening hole 2011 is parallel to the radial direction of the rim 3. This allows the length of the spoke portion 201 to be utilized to create a larger hollow area, reducing more material and thus achieving maximum weight reduction. In addition, because the spoke portion 201 is fan-shaped, it is narrower on the side closest to the center hole 102 of the connecting disc 1 and wider on the side away from the center hole 102 of the connecting disc 1. Therefore, the first lightening hole 2011 in this embodiment adopts a narrow bottom and wide top design. This achieves lightweighting of the spoke member 2 while avoiding excessive reduction in the spoke portion 201 material, thereby ensuring sufficient support strength for the spoke member 2.

[0046] like Figure 2 and Figure 3 As shown, in an optional embodiment, the connecting disc 1 has multiple fixing holes 101 evenly distributed around a circle with a radius R1, centered at the center of the connecting disc 1. The spoke portion 201 extends downward to form a fixing portion 203. The fixing portion 203 is provided with a connecting through-hole 2031 having an inner diameter identical to that of the fixing hole 101. Both the fixing hole 101 and the connecting through-hole 2031 are penetrated by threaded connectors, which may be fixing bolts. The threaded connectors, combined with the fixing portion 203, securely connect the spoke 2 to the connecting disc 1, ensuring reliable connection. This connection method also facilitates wheel assembly, disassembly, and subsequent maintenance and replacement, enhancing flexibility and convenience during wheel processing and use.

[0047] When the vehicle is running, the spoke portion 201 of the wheel spoke member 2 has to bear the vertical gravity from the vehicle body, and also has to deal with the impact force caused by road bumps and the force when the vehicle is accelerated or braked. Therefore, in order to make the spoke portion 201 better disperse and transmit these complex external forces and prevent the spoke portion 201 from being deformed or damaged due to excessive local force, 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 supporting strength of the spoke portion 201, ensures the overall load-bearing capacity of the spoke member 2, and further ensures the driving safety of the vehicle.

[0048] 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 member 2 and the wheel while ensuring the supporting strength of the spoke portion 201.

[0049] like Figure 1 and Figure 4 As shown, in an optional embodiment, the spoke member 2 also includes an arc-shaped bending portion 204 for connecting the spoke portion 201 and the support portion 202; the outer side of the arc-shaped bending portion 204 has an arc-shaped surface 2041 connected with the surface of the spoke portion 201 and the surface of the support portion 202, and the arc-shaped surface 2041 is smoothly connected with the surface of the spoke portion 201 and the support portion 202, which can relieve the concentration of stress at the connection portion between the spoke portion 201 and the support portion 202, reduce local stress peaks, and thus reduce the risk of fatigue cracks or deformation caused by long-term stress at the connection portion 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 member 2 can be extended, and a more reliable structural foundation for the lightweight design of the wheel is also provided, ensuring that the overall load-bearing performance of the wheel is not affected while reducing the weight of the wheel.

[0050] In order to further alleviate the 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 middle part of the second reinforcing protrusion 206 is thicker and the two sides are narrower. While meeting the lightweight requirements of the spoke 2 and the wheel, it can also alleviate stress concentration.

[0051] In an optional embodiment, a U-shaped weight-reducing groove 2021 or a second weight-reducing hole 2022 is provided on the support portion 202 along the length direction of the support portion 202. Without affecting the support strength of the support portion 202, by adopting a weight-reducing design for the support portion 202, the amount of material used in the spoke 2 can be further reduced, thereby achieving lightweighting of the 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 spoke member 2 of the first structural form provided by the present invention, a U-shaped weight-reducing groove 2021 is provided on the support portion 202 , and the notch of the U-shaped weight-reducing groove 2021 is located at the end of the support portion 202 .

[0052] like Figure 6 As shown, the present invention provides a second structural form of the spoke member 2, in which the second weight-reducing hole 2022 is provided on the support portion 202 of the spoke member 2. Compared with the first structural form of the spoke member 2 provided by the present invention, the second structural form of the spoke member 2 is provided with a connecting portion 209 at the end of the support portion 202, which has higher support strength, making the lightweight wheel suitable for heavy-load scenarios.

[0053] 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 portion 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 portion 202, thereby ensuring the support strength of the support portion 202 while satisfying the lightweight requirement of the spoke member 2.

[0054] like Figures 8 to 14 As shown, the present invention also provides a spoke member 2 of a third structural form. In the spoke member 2 of this structural form, a connecting protrusion 207 is formed downward at the end of the support portion 202, and the connecting protrusion 207 is respectively provided with an embedding portion 208 and an embedding groove 2071 on both sides of the support portion 202 in the width direction; the embedding portion 208 is embedded in the embedding groove 2071; the two adjacent support portions 202 are firmly connected together through 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 applicable to more heavy-load scenarios.

[0055] like Figure 9 and Figure 10 As shown, in an optional embodiment, the embedded portion 208 is a curved cylindrical embedded portion 208, and the center line of the embedded portion 208 is an arc-shaped center line BC, and the arc-shaped center line BC 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 facing away from the spoke portion 201, and the opening 2072 is connected to the embedded groove 2071. In this embodiment, the embedding portion 208 is designed to be curved cylindrical and its arc-shaped center line BC is parallel to the outer circumferential surface of the connecting disk 1, which can make the connection between adjacent supporting portions 202 fit more closely to the circumferential curvature of the rim 3, ensure that the connection between adjacent supporting portions 202 is evenly stressed, avoid local stress concentration, and enhance the overall structural stability of the rim 3; and the connecting protrusion 207 is provided with an opening 2072 connected to the embedding groove 2071 on the side facing away from the spoke portion 201, which not only facilitates the embedding portion 208 to be quickly and accurately embedded in the embedding groove 2071, simplifies the disassembly and assembly process, but also provides a certain adjustment space for the installation of the embedding portion 208, ensures the tightness of the connection between adjacent supporting portions 202, and further improves the rigidity and strength of the rim 3.

[0056] like Figure 4As shown, in an optional embodiment, the angle α between the spoke portion 201 and the support portion is α, and the range of the angle α is 125°≥α≥60°, which can better adapt to the requirements of different ET offsets (hub offset, i.e., the distance between the centerline of the rim 3 and the mounting surface of the connecting plate 1), thereby enabling the lightweight wheel to adapt to the installation requirements of more different vehicle models or usage scenarios, thereby 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 driving, such as the vertical gravity of the vehicle body, the impact force of road bumps, and the force applied during vehicle acceleration or braking, thereby avoiding 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 member 2, and further ensuring the load-bearing capacity and service life of the lightweight wheel, and being able to achieve lightweighting of the wheel without affecting its normal performance.

[0057] 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 not only has the advantages of explosion-proof tires and air pressure maintenance-free, but also can achieve overall lightweight, which can improve the driving comfort and cruising range of the vehicle.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A lightweight wheel comprising a connecting disc (1); characterized in that: The invention also includes an inverted L-shaped spoke member (2); the spoke member (2) is evenly arranged on the inner side of the connecting disk (1) with the center of the connecting disk (1) as the center of the circle, and the spoke member (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 a first weight-reducing hole (2011) is provided on the spoke portion (201); the spoke portion (201) arranged radially along the rim (3) is fixedly mounted on the connecting disk (1).

2. The lightweight wheel according to claim 1, characterized in that: 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 narrow at the bottom and wide at the top.

3. The lightweight wheel according to claim 1, characterized in that: The connecting disk (1) is provided with a plurality of fixing holes (101) uniformly distributed along the circumference of the connecting disk (1) with a radius 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) having an inner diameter consistent with the inner diameter of the fixing hole (101); threaded connectors are passed through both the fixing hole (101) and the connecting through hole (2031); and 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 member (2) further comprises an arcuate bending portion (204) for connecting the spoke portion (201) and the support portion (202); the outer side of the arcuate bending portion (204) comprises an arcuate surface (2041) connected to the surface of the spoke portion (201) and the surface of the support portion (202); and the inner side of the arcuate bending portion (204) comprises a second reinforcing protrusion (206).

5. The lightweight wheel according to claim 1, characterized in that: A U-shaped weight-reducing groove (2021) or a second weight-reducing hole (2022) is provided on the support portion (202) along the length direction of the support portion (202), and the notch of the U-shaped weight-reducing groove (2021) is located at the end of the support portion (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 portion (202); and the inner width of the second weight-reducing hole (2022) is less than or equal to 60% of the width of the support portion (202).

7. The lightweight wheel according to claim 1, characterized in that: A connecting protrusion (207) is formed downwardly at the end of the supporting portion (202), and an embedding portion (208) and an embedding groove (2071) are respectively provided on both sides of the connecting protrusion (207) in the width direction of the supporting portion (202); the embedding portion (208) is embedded in the embedding groove (2071); and two adjacent supporting portions (202) are connected together via the embedding portion (208).

8. The lightweight wheel according to claim 7, characterized in that: The embedding portion (208) is a curved columnar embedding portion, and the center line of the embedding portion (208) is an arc-shaped center line; the connecting protrusion (207) is provided with an opening (2072) on the side facing away from the spoke portion (201), and the opening (2072) is connected to the embedding groove (2071).

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

10. A non-pneumatic wheel assembly, characterized in that: The lightweight wheel comprises a non-pneumatic tire (4) and any one of claims 1 to 9.

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