Coupling and composite wheel hub

Abstract

The utility model provides a kind of connecting piece and composite hub, connecting piece has main part and the pair of positioning part extended from the side of main part, when this connecting piece is placed in spoke mould, it can be positioned accurately in mould by the contact of the pair of positioning part and mould.Further, since positioning part has an arc end face, it is used as positioning cooperation surface with mould, so even if there is certain tolerance in the size of connecting piece, arc end face can still keep good contact with mould, and arc end face is also less likely to damage the cavity surface of mould.Further, since positioning part also has a neck part with narrower width, when connecting piece bears excessive moulding pressure due to some reasons, neck part will deform first, and main part of connecting piece can be basically unaffected, and the positioning of connecting piece in mould is also basically unaffected, so that the positioning of multiple connecting pieces in formed spoke can be guaranteed.

Description

Technical Field

[0001] This utility model relates to vehicle wheel hub components, specifically to a connecting component and a composite wheel hub. Background Technology

[0002] Currently, there is a type of composite wheel hub that uses different materials to manufacture the rim and spokes. The rim, for example, is made of iron, providing sufficient strength and making it less susceptible to damage from tools like pry bars when installing tires. The spokes, for example, are made of aluminum alloy, resulting in an aesthetically pleasing wheel hub and significantly reducing overall weight compared to pure iron hubs, making it suitable for electric two-wheelers. To reliably connect these rims and spokes made of different materials, one design involves pre-embedding multiple connectors at the outer ends of the spokes. These connectors, for example, are also made of iron and can be welded to the rim, thus ensuring a secure bond between the rim and spokes.

[0003] When manufacturing the aforementioned composite wheel hub, multiple connecting parts need to be pre-placed in corresponding positions within the mold. Then, molten metal is injected into the mold for die casting, forming a spoke component with pre-installed connecting parts. During pre-placement and during die casting, it is necessary to position and limit the connecting parts within the mold to prevent positional shifts. This ensures accurate positioning of the connecting parts in the finished spoke component, facilitating subsequent press-fitting and welding. For example, CN219903920U discloses a connecting piece with a positioning structure. One edge of the connecting piece has two pointed tips for positioning. During mold closing, the bottom of the connecting piece is embedded in a groove in the lower mold, while the two pointed tips abut against the upper mold, thus positioning it within the mold.

[0004] However, the connecting parts inevitably have certain dimensional tolerances. Under the huge pressure of mold closing, the tolerances may cause the connecting parts to warp or deform, which will affect the subsequent welding operation.

[0005] On the other hand, in order to further improve the reliability of the wheel hub and thus improve the driving safety of electric two-wheelers, it is also desirable to further improve the structural strength of the wheel hub, including improving the bonding strength between the connecting parts and the spokes. Utility Model Content

[0006] This utility model is made to solve at least one of the above-mentioned problems, and its purpose is to provide a connecting component that can be accurately positioned in the mold and is not prone to overall deformation, and can achieve a more solid connection with the wheel spokes, as well as a composite wheel hub using this connecting component. The technical solution adopted by this utility model is as follows:

[0007] This utility model provides a connector for connecting the rim and spokes of a composite wheel hub, wherein the spokes are made by a corresponding mold. The connector comprises: a main body portion, which is a bent sheet for engaging with the spokes and has a fixing surface for fixing to the rim; and a pair of positioning portions extending from one side of the main body portion for positioning the connector in the mold. Each positioning portion has: a positioning part with a positioning mating surface, which is an arc-shaped end face, for abutting against the mold to position the connector in the mold; and a neck portion connecting the positioning part and the main body portion, the neck portion being narrower than the width of the positioning part.

[0008] The connector provided by this utility model may also have the following technical features: the two sides of the neck portion are concave arc-shaped, the positioning portion is plate-shaped, the positioning mating surface is curved in the length direction of the connector, and straight in the thickness direction of the positioning portion.

[0009] The connector provided by this utility model may also have the following technical features, wherein the main body is U-shaped and includes a first sheet portion, a curved portion and a second sheet portion connected in sequence, and a pair of positioning portions extend from one edge of the second sheet portion.

[0010] The connector provided by this utility model may also have the following technical features: the middle part of the curved portion in the width direction has an elongated stepped portion, and the outer side of the curved portion corresponding to the stepped portion has an elongated connecting groove for connecting with the spokes.

[0011] The connector provided by this utility model may also have the following technical features, wherein the curved portion includes a first curved segment, a first extended segment, a second curved segment, a second extended segment, and a third curved segment connected in sequence. The first curved segment is connected between the first sheet-like portion and the first extended segment. The first extended segment is elongated and its extension direction is perpendicular to the surface direction of the first sheet-like portion. The third curved segment is connected between the second sheet-like portion and the second extended segment. The second extended segment is elongated and its extension direction is perpendicular to the surface direction of the second sheet-like portion. The second extended segment is closer to the positioning portion than the first extended segment, thereby forming the stepped portion.

[0012] The connecting member provided by this utility model may also have the following technical feature, wherein, in the main body, at least the first sheet-like portion and the first curved section have an arc that matches the inner surface of the rim.

[0013] The connector provided by this utility model may also have the following technical feature, wherein the fixing surface includes at least the outer surface of the first curved section.

[0014] The connector provided by this utility model may also have the following technical features: the first sheet portion has one or more first connecting holes, and the two ends of the first sheet portion in the length direction have connecting notches; the second sheet portion has one or more second connecting holes; and the first connecting holes, the first connecting holes and the connecting notches are used to connect with the spokes.

[0015] The connector provided by this utility model may also have the following technical features: the first connecting hole is a circular through hole extending along the thickness direction of the first sheet-like portion; the connecting notch is a square notch with rounded corners; and the second connecting hole is a circular through hole extending along the thickness direction of the second sheet-like portion.

[0016] This utility model provides a composite wheel hub, which has the following technical features: the composite wheel hub includes: a rim made of a first material; spokes made of a second material; and a plurality of connecting members made of a material that can be welded to the first material, which are attached at the outer ends of the spokes for fixing the spokes to the rim, wherein the connecting members are any of the above-mentioned connecting members.

[0017] Functions and effects of utility models

[0018] According to the connector and composite hub provided by this utility model, since the connector has a main body and a pair of positioning parts extending from one side of the main body, when the connector is placed in a mold for manufacturing wheel spokes, the accurate positioning of the connector in the mold can be achieved through the contact between the pair of positioning parts and the mold. Furthermore, since the positioning part has an arc-shaped end face, which serves as a mating surface with the mold, even if the dimensions of the connector have certain tolerances or the surface of the mold cavity has minor defects, good contact with the mold can still be maintained through the arc-shaped end face, and the arc-shaped end face is less likely to damage the surface of the mold cavity. Furthermore, since the positioning part also has a narrower neck portion, when the connector is subjected to excessive mold closing pressure for some reason, the neck portion will deform first, while the main body of the connector will remain largely unaffected, and the positioning of the connector in the mold will also remain largely unaffected, thereby ensuring accurate positioning of multiple connectors in the formed wheel spokes. Attached Figure Description

[0019] Figure 1 This is a perspective view of the wheel spokes and connecting parts in an embodiment of this utility model;

[0020] Figure 2This is a cross-sectional view of the spokes and connecting parts in an embodiment of this utility model;

[0021] Figure 3 yes Figure 2 Enlarged view of the inner part of frame A;

[0022] Figure 4 This is a perspective view of the connecting member in an embodiment of this utility model;

[0023] Figure 5 This is a perspective view of the connector from another angle in an embodiment of this utility model;

[0024] Figure 6 This is a cross-sectional view of the connecting member in an embodiment of this utility model.

[0025] Figure label:

[0026] Connector 10; Main body 11; First plate-shaped portion 111; First mating hole 1111; Mat notch 1112; Second plate-shaped portion 112; Bevel 1121; Second mating hole 1122; Bending portion 113; First bending section 1131; First extension section 1132; Second bending section 1133; Second extension section 1134; Third bending section 1135; Step portion 1136; Mat groove 1137; Fixing surface 114; Relief groove 115; Positioning portion 12; Base portion 121; Neck portion 122; Positioning portion 123; Positioning mating surface 1231; Spoke 20; Spoke main body 21; Bearing sleeve 211; Disc brake seat 212; Spoke portion 22; Outer end face 221. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following describes the connecting parts and composite wheel hub of this utility model in detail with reference to the embodiments and accompanying drawings.

[0028] Example

[0029] This embodiment provides a connecting component and a composite wheel hub. The composite wheel hub includes a rim, spokes, and multiple connecting components. The rim is made of a high-strength first material, such as iron or steel. The spokes are made of a relatively lightweight second material, such as aluminum alloy or magnesium alloy. Multiple connecting components are respectively attached to the outer ends of the spokes and welded to the rim, thereby firmly bonding the rim and spokes. Accordingly, the connecting components are made of a material that can be effectively welded to the rim material using conventional welding methods, such as iron or steel.

[0030] The structure of the connector will be described in detail below, and one type of spoke structure to which the connector can be applied will be shown as an example.

[0031] Figure 1 This is a perspective view of the wheel spokes and connecting parts in this embodiment. Figure 2 This is a cross-sectional view of the wheel spokes and connecting parts in this embodiment. Figure 3 yes Figure 2 Enlarged view of the inner part of frame A.

[0032] like Figures 1 to 3 As shown, multiple connectors 10 are pre-embedded (set) at multiple outer ends of the spokes 20 and partially exposed outside the spokes 20 for welding to the inner surface of the rim.

[0033] Figure 4 This is a perspective view of the connector in this embodiment. Figure 5 This is a perspective view of the connector from another angle in this embodiment. Figure 6 This is a cross-sectional view of the connector in this embodiment.

[0034] like Figures 4 to 6 As shown, the connector 10 is generally in the shape of a curved U-shape, and has a pair of protruding structures on one edge along its curvature. The connector 10 is a one-piece molded part made of iron or steel, for example, it can be manufactured by a stamping process. The connector 10 includes an integrally formed main body 11 and a pair of positioning parts 12.

[0035] The main body 11 has a uniform thickness and an overall shape that is close to a U-shaped sheet, including a first sheet portion 111, a curved portion 113 and a second sheet portion 112 connected in sequence.

[0036] The first sheet-like portion 111 is elongated and has a certain curvature along its length, which matches the curvature of the middle part of the inner surface of the rim. The first sheet-like portion 111 is approximately a rectangular sheet with a small curvature. The first sheet-like portion 111 has multiple first engagement holes 1111 and engagement notches 1112 for engagement with the spokes. The first engagement holes 1111 are circular through holes extending along the thickness direction of the first sheet-like portion 111. The multiple first engagement holes 1111 are arranged at equal intervals along the length direction of the first sheet-like portion 111. In this embodiment, there are three holes, and their diameters are basically the same. The engagement notches 1112 are rectangular notches with rounded corners. In this embodiment, there are two notches, located at both ends of the length direction of the first sheet-like portion 111. The engagement notches 1112 also extend along the thickness direction of the first sheet-like portion 111.

[0037] The second sheet-like portion 112 is also elongated and has a certain curvature along its length, which matches the curvature of the middle part of the inner surface of the rim, meaning that the first sheet-like portion 111 and the second sheet-like portion 112 are approximately parallel to each other. The length of the second sheet-like portion 112 is basically the same as the length of the first sheet-like portion 111. The second sheet-like portion 112 is irregularly shaped, with a bevel 1121 at each end along its length, such that the length at the outer end of the second sheet-like portion 112 is less than the length of its other parts. The second sheet-like portion 112 has a plurality of second connecting holes 1122, which are circular through holes extending along the thickness direction of the second sheet-like portion 112, arranged sequentially at equal intervals along the length direction of the second sheet-like portion 112. In this embodiment, there are three holes, and the diameter of the second connecting hole 1122 located in the middle is smaller than the diameter of the two second connecting holes 1122 on both sides.

[0038] The two sides of the curved portion 113 in the width direction are connected to the first sheet portion 111 and the second sheet portion 112, respectively. The curved portion 113 includes a first curved segment 1131, a first extended segment 1132, a second curved segment 1133, a second extended segment 1134 and a third curved segment 1135 connected in sequence, and each segment has the same length.

[0039] The first curved segment 1131, the second curved segment 1133, and the third curved segment 1135 are all elongated strips with an arc-shaped cross-section along their length, creating a smooth transition between the two connected parts. The first extension segment 1132 and the second extension segment 1134 are both elongated sheet-like pieces with a certain curvature in their width direction, and their extension directions are approximately perpendicular to the surface direction of the first sheet-like portion 111. Furthermore, the second extension segment 1134 is closer to the positioning part 12 than the first extension segment 1132, thus forming an elongated stepped portion 1136 in the middle of the curved portion 113. Corresponding to the stepped portion 1136, an elongated engaging groove 1137 is formed on the outer side of the curved portion 113 of the connector 10. The corners within the engaging groove 1137 are rounded.

[0040] The main body 11 is used to engage with the spokes 20, i.e., it is pre-embedded in the spokes 20, and the main body 11 has a fixing surface 114 located outside the spokes 20 for fixing to the rim, i.e., for welding to the rim. A welding portion is formed between the fixing surface 114 and the middle of the inner surface of the rim, and the welding portion can be a weld point or weld seam, etc. The fixing surface 114 includes at least the outer surface of the first curved section 1131. Optionally, the fixing surface 114 may further include the outer surface of the first sheet portion 112 (i.e., the surface of the first sheet portion 112 with the largest area and furthest from the second sheet portion 112) or the outer end face (i.e., the end face of the outer end in the width direction of the first sheet portion 112, the upper end face in the figure).

[0041] Two positioning parts 12 extend from both ends of one side edge of the second sheet-like part 112. Each positioning part 12 is an irregularly shaped sheet, and its extension direction is parallel to the surface direction of the second sheet-like part 112. That is, the second sheet-like part 112 and the two positioning parts 12 can be regarded as a relatively flat sheet-like part with a relatively complex edge shape.

[0042] Each positioning part 12 can be considered as a triangular plate with two semi-circular notches, and its outer end (one corner of the triangle) is arc-shaped. The positioning part 12 includes a base part 121, a neck part 122 and a positioning part 123 connected in sequence.

[0043] The base portion 121 extends from one side edge of the second sheet portion 112, and the width of the base portion 121 gradually narrows along its extension direction.

[0044] Two semi-circular notches are formed on both sides of the neck portion 122, making the width of the neck portion 122 significantly smaller than the width of the base portion 121 and also smaller than the width of the positioning portion 123, and the two sides of the neck portion 122 are concave arc-shaped. The extension direction of the neck portion 122 is inclined towards the middle of the length direction of the connector 10.

[0045] The positioning portion 123 is in the shape of a small block and has a positioning mating surface 1231, which is an arc-shaped end face. This arc-shaped end face is curved (with a certain curvature) in the length direction of the connector 10 and straight in the thickness direction of the connector 10. The two positioning portions 12 are mirror-symmetrical along the central axis in the middle of the length direction of the connector 10. The distance from the outermost end (the uppermost end in the figure) of the two positioning mating surfaces 1231 to the outer surface of the curved portion 113 of the connector 10 (i.e., the lowermost end of the connector 10 in the figure) is the same.

[0046] The positioning part 12 is used to cooperate with the positioning structure in the mold to achieve accurate positioning of the connecting part 10 in the mold. Corresponding to the structure of the positioning part 12 described above, for example, a split mold includes a matching upper mold and a lower mold. When the mold is closed, a cavity corresponding to the shape of the wheel spoke is formed between the lower mold and the lower mold, which is used to inject molten metal and perform die casting to form the wheel spoke. Multiple placement grooves are formed in the lower mold. The placement grooves are strip-shaped grooves, and their shape matches the shape of the end of the connecting part 10 with the curved portion 113. That is, the placement grooves may have a stepped structure.

[0047] Furthermore, a relief groove 115 is formed between the two positioning portions 12. Its shape is approximately an inverted trapezoid with curved sides. When molten metal is injected into the mold for die casting, the relief groove 115 allows the molten metal to flow through. Due to the presence of the neck portion 122, and because the sides of the neck portion 122 are concave and curved, the size of the relief groove 115 is increased.

[0048] In the manufacturing process of composite wheel hubs, multiple connecting parts 10 are pre-placed in the placement grooves of the lower mold while the mold is open, with one end of each connecting part 10 roughly fitting into the groove. Then, the mold is closed for die casting. During mold closing, the positioning mating surfaces 1231 of the two positioning parts 12 of the connecting part 10 abut against the cavity surface of the upper mold, pressing the connecting part 10 firmly into its corresponding placement groove, thus accurately positioning the connecting part 10 within the mold. During subsequent die casting with molten metal, the aforementioned structure also helps maintain the position of the connecting part 10 within the mold, preventing positional shift due to the flowing molten metal. Because the positioning mating surface 1231 is an arc-shaped end face, even if the connecting part 10 has certain dimensional tolerances, it can still make good contact with the cavity surface of the upper mold. Furthermore, since the neck portion 122 is significantly narrower, when the positioning portion 12 is subjected to excessive mold closing pressure (for example, due to dimensional tolerances), the neck portion 122 will deform, while the main body portion 11 will be basically unaffected and will not deform. The overall positioning of the connecting member 10 in the mold will also be basically unaffected.

[0049] like Figure 1 and Figure 2 As shown, exemplarily, the spokes 20 may include a spoke body portion 21 and a plurality of spoke portions 22. The spoke body portion 21 forms a bearing sleeve 211 and a disc brake seat 212 in its central part. The bearing sleeve 211 has a through circular hole in its central part for the axle to pass through. The disc brake seat 212 is an irregularly shaped column with multiple threaded holes for mounting the disc brake assembly. The spoke portions 22 are generally annular, and the outer circumference of the spoke portion 22 is thicker than its inner circumference. Each spoke portion 22 has an outer end face 221 at its outer end, and the outer end face 221 has an arc that matches the inner surface of the rim. In this embodiment, there are three spoke portions 22.

[0050] The three aforementioned connecting parts 10 are respectively embedded (set) at the outer end of each spoke portion 22, and the outer surface of the first sheet portion 111 and the outer surface of the first curved section 1131 of the connecting part 10 are exposed outside the spoke 20, so that they can be welded to the inner surface of the rim.

[0051] Before welding, the outer surface of the first sheet portion 111 and the outer surface of the first curved section 1131 (specifically according to the predetermined welding position) can be surface-cut to remove the thin metal layer that has been attached to these outer surfaces during the die-casting process, so as to avoid affecting the welding effect.

[0052] In alternative solutions, the spokes 20 can also take other shapes. For example, the spoke portion 22 can be long, block-shaped, or plate-shaped. The spoke portion 22 can have or not have structures such as through holes / grooves. The number of spoke portions 22 can also be more than three. The number of connecting members 10 can correspond to the number of spoke portions 22.

[0053] The role and effect of the embodiments

[0054] According to the connector and composite hub provided in this embodiment, since the connector has a main body and a pair of positioning portions extending from one side of the main body, when the connector is placed in a mold for manufacturing wheel spokes, the accurate positioning of the connector in the mold can be achieved through the contact between the pair of positioning portions and the mold. Furthermore, since the positioning portion has an arc-shaped end face, which serves as a mating surface with the mold, even if the connector has certain dimensional tolerances or the mold cavity surface has minor defects, good contact with the mold can still be maintained through the arc-shaped end face, and the arc-shaped end face is less likely to damage the mold cavity surface. Furthermore, since the positioning portion also has a narrower neck portion, when the connector is subjected to excessive mold closing pressure for some reason, the neck portion will deform first, while the main body of the connector will remain largely unaffected, and the positioning of the connector in the mold will also remain largely unaffected, thereby ensuring accurate positioning of multiple connectors in the formed wheel spokes.

[0055] In this embodiment, the connector is a one-piece molded thin sheet of iron or steel, which can be easily manufactured by stamping or other operations. The neck portion of the positioning part has concave arc-shaped sides, which can also be easily formed by punching or other operations. Therefore, this connector is easy to process and manufacture.

[0056] Furthermore, the connector has a mirror-symmetric structure, and the pair of positioning parts are also mirror-symmetric. The highest point of the positioning mating surface of the two positioning parts is the same distance from the outer surface of the other side of the connector. Therefore, placing the connector in the positioning groove of the lower mold and making its positioning mating surface abut against the upper mold can achieve a good positioning effect.

[0057] Furthermore, since the neck of the positioning part has an inwardly concave arc shape on both sides, the size of the clearance groove between the two positioning parts is also larger. When molten metal is injected into the mold and die-cast, the situation of poor flow of molten metal due to excessive size can be avoided, thus avoiding defects in the corresponding parts of the wheel spoke.

[0058] Furthermore, the connector has a curved portion that connects the two sheet-like parts, and a long strip-shaped stepped structure is formed in the middle of the curved portion. Correspondingly, a long strip-shaped connecting groove is formed on the outside of the connector, which makes the connection between the connector and the spoke more secure, allowing the hub to withstand greater pull-out force.

[0059] Furthermore, the curved portion of the connector consists of two extension sections and three bending sections. That is, the curved portion of the connector has no sharp edges or corners, which can avoid stress concentration at sharp edges and corners, and thus can withstand greater stress.

[0060] Furthermore, since the first piece has multiple first connecting holes and connecting notches, and the second piece has multiple second connecting holes, when molten metal is injected for die casting, the molten metal will not only flow into the inner side of the U-shaped connecting piece, but also flow through the connecting holes and connecting notches, and solidify at these locations. This results in the spokes exhibiting a complex covering and gripping structure for the connecting parts, thereby ensuring a firm connection between the spokes and the connecting parts, and enabling the hub to withstand a large pull-out force.

[0061] Furthermore, since the first sheet-like portion and the first curved section have an arc that matches the center of the inner surface of the rim, after the spokes with multiple pre-embedded connecting parts are pressed into the inner ring of the rim, the first sheet-like portion of each connecting part can fit well against the inner surface of the rim, thus enabling better welding between the two.

[0062] The above embodiments are merely illustrative of specific implementations of the present invention, and the present invention is not limited to the scope of the above embodiments. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connecting member for connecting the rim and spokes of a composite wheel hub, the spokes being manufactured using a corresponding mold, characterized in that, include: The main body is in the form of a bent sheet, used to engage with the spokes, and has a fixing surface for fixing to the rim; as well as A pair of positioning parts extend from one side of the main body and are used to position the connecting member in the mold. The positioning part has: The positioning part has a positioning mating surface, which is an arc-shaped end face, used to abut against the mold to realize the positioning of the connecting part in the mold; as well as The neck portion, connecting the positioning portion and the main body portion, has a width smaller than the width of the positioning portion.

2. The connector according to claim 1, characterized in that: in, The neck portion has concave arc-shaped sides. The positioning part is plate-shaped. The positioning mating surface is curved in the length direction of the connecting member and straight in the thickness direction of the positioning part.

3. The connector according to claim 1, characterized in that: in, The main body is U-shaped and includes a first sheet portion, a curved portion, and a second sheet portion connected in sequence. A pair of positioning portions extend from one side edge of the second sheet-like portion.

4. The connector according to claim 3, characterized in that: in, The curved portion has a long, stepped section in the middle of its width direction. The outer side of the curved portion corresponding to the stepped portion has an elongated joint groove for engaging with the spokes.

5. The connector according to claim 4, characterized in that: in, The curved portion includes a first curved segment, a first extended segment, a second curved segment, a second extended segment, and a third curved segment connected in sequence. The first curved segment connects the first sheet-like portion and the first extended segment. The first extended segment is elongated and sheet-like, and its extending direction is perpendicular to the surface direction of the first sheet-like portion. The third curved segment connects the second sheet-like portion and the second extended segment. The second extended segment is elongated and sheet-like, and its extending direction is perpendicular to the surface direction of the second sheet-like portion. The second extension is closer to the positioning portion than the first extension, thereby forming the stepped portion.

6. The connector according to claim 5, characterized in that: in, In the main body, at least the first sheet-like portion and the first curved section have an arc that matches the inner surface of the rim.

7. The connector according to claim 5, characterized in that: in, The fixed surface includes at least the outer surface of the first curved section.

8. The connector according to claim 3, characterized in that: in, The first sheet-like portion has one or more first bonding holes, and the two ends of the first sheet-like portion in the length direction have bonding notches. The second sheet-like portion has one or more second bonding holes. The first connecting hole, the first connecting hole and the connecting notch are used to connect with the spokes.

9. The connector according to claim 8, characterized in that: in, The first connecting hole is a circular through hole extending along the thickness direction of the first sheet-like portion, and the connecting notch is a square notch with rounded corners. The second connecting hole is a circular through hole that extends along the thickness direction of the second sheet-like portion.

10. A composite wheel hub, characterized in that, include: The rim is made of the first material; The spokes are made of a second material; as well as Multiple connecting members, made of a material weldable to the first material, are attached at the outer ends of the spokes to secure the spokes to the rim. The connecting member is the connecting member according to any one of claims 1-9.

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