Wheel hub production method and wheel hub structure

Abstract

The application discloses a hub production method and a hub structure thereof, and comprises the following steps: machining an annular boss A on one end of a rim unit cylindrical blank, forming a tire mounting groove and a tire mounting surface; necking the tire mounting surface to form a raised ring; machining a flange A on the rim unit cylindrical blank; folding the flange A edge to the side away from the rim cylindrical blank to form an annular boss B; connecting an annular inner sleeve with the rim unit cylindrical blank, so that an annular cavity B is formed between the annular inner sleeve, the flange B and the tire mounting surface; folding the end of the rim unit cylindrical blank away from the flange A inward to form a rim unit B; fixing two rim units B to form a rim B; fixing a spoke at one end of the rim B to form a hub B. According to the hub production method and the hub structure, the rim unit can be prepared through a cylindrical blank, and only needs to be connected and fixed after being folded through another cylindrical blank, so that the strength can be effectively improved, and the weight of the rim is greatly reduced.

Description

Technical Field

[0001] This invention relates to the technical field of wheel hub production, specifically to a wheel hub production method and wheel hub structure. Background Technology

[0002] A wheel hub is the rotating part of the tire's inner rim, connected to the wheel core by a pillar; it's the central metal component supporting the tire and mounted on the axle. It's also called a wheel rim, steel rim, wheel, or tire rim. Wheel hubs come in many varieties depending on their diameter, width, molding method, and materials.

[0003] A typical wheel hub consists of a rim and spokes coaxially fixed together. The weight of the wheel hub affects vehicle energy consumption; increased hub weight leads to increased energy consumption. Therefore, weight control during wheel hub production is crucial. Those skilled in the art need to minimize the weight of both the rim and spokes. Furthermore, since the wheel hub is the only component in contact with the ground, its strength requirements are extremely high. However, with traditional processes or structures, lighter wheel hubs tend to have lower strength. This results in an inability to achieve an effective balance between lightweight and high strength in current wheel hub technology. While the weight of the spokes can be effectively controlled through their structural design and metal usage, reducing the weight of the rim is more challenging due to its relatively fixed material and standardized thickness requirements. The rim also needs to maintain its mechanical properties. Therefore, producing high-strength, lightweight wheel rims is a pressing technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wheel hub production method and wheel hub structure. The wheel rim unit used for splicing wheel rims can be prepared from a cylindrical blank. In order to improve the strength at the tire mounting position where it is connected to the tire, it is only necessary to connect and fix it by flanging another cylindrical blank. This can effectively improve the strength while greatly reducing the weight of the wheel rim.

[0005] The technical solution adopted in this invention is:

[0006] The wheel hub manufacturing method includes the following steps:

[0007] S1. Prepare a cylindrical blank for a rim unit with a circular cross-section;

[0008] S2. Machin an annular boss A at one end of the cylindrical blank of the rim unit to form a tire mounting groove and a tire mounting surface;

[0009] S3. The tire mounting surface is narrowed to form a raised ring at the connection between the tire mounting groove and the tire mounting surface;

[0010] S4. Fold the cylindrical blank of the rim unit obtained in step S3 outward to form a flange A corresponding to the edge of the tire mounting surface.

[0011] S6. Fold the edge of the flange A of the rim unit cylindrical blank obtained in step S4 toward the side away from the rim cylindrical blank to form an annular boss B.

[0012] S7. Connect the annular inner sleeve with flange B to the rim unit cylindrical blank obtained in step S6 on the same axis, and fix the outer wall of the end edge of the annular inner sleeve away from flange B to the inner wall of the rim unit cylindrical blank. Fold the edge of the annular boss B inward and fix it to the flange B of the annular inner sleeve to form the rim B, so that an annular cavity B is formed between the annular inner sleeve, flange B and the tire surface.

[0013] S9. Fold the edge of the rim unit cylindrical blank obtained in step S7 away from the flange A inward to form the connecting flange B, thus forming the rim unit B.

[0014] S11. The two rim units B obtained in step S9 are coaxially fixed by connecting flange B to form rim B;

[0015] S13. Fix one end of the rim B obtained in step S11 to a spoke on the same axis to form a hub B.

[0016] A further improvement of the present invention is that the method for preparing the annular inner sleeve includes the following steps:

[0017] S61. Prepare an inner sleeve cylindrical blank whose outer diameter matches the inner diameter of the rim unit cylindrical blank;

[0018] S62. Fold the edge of one end of the inner sleeve cylindrical blank obtained in step S62 outward to form a flange B, thereby obtaining an annular inner sleeve.

[0019] A further improvement of the present invention is that the axial length of the annular inner sleeve is greater than the axial length from the connection between the tire mounting groove and the cylindrical blank of the rim unit to the flange A, and the outer diameter of the flange B is greater than the diameter of the tire mounting surface and less than or equal to the inner diameter of the annular boss B.

[0020] A further improvement of the present invention includes the following steps:

[0021] S5. Fold the edge of the flange A of the rim unit cylindrical blank obtained in step S4 to form the rim A;

[0022] S8. Fold the edge of the rim unit cylindrical blank obtained in step S5 away from the flange inward to form the connecting flange A, thus forming the rim unit A.

[0023] S10. The rim unit A obtained in step S8 and the rim unit B obtained in step S9 are fixed coaxially by connecting flange A and connecting flange B to form rim A;

[0024] S12. Fix one end of the rim A obtained in step S10 with spokes coaxially to form a hub A.

[0025] A further improvement of the present invention is that the outer diameter of the rim A in step S5 is equal to the outer diameter of the rim B in step S7.

[0026] A further improvement of the present invention is that the axial length between the rim A and the protruding ring in step S5 is equal to the axial length between the rim B and the protruding ring in step S7.

[0027] A further improvement of the present invention is that the inner diameter of the connecting flange A in step S8 is equal to that of the connecting flange B in step S9.

[0028] A further improvement of the present invention is that, in step S12, the rim A obtained in step S10 is coaxially fixed with spokes at one end corresponding to the rim unit A to form a hub A.

[0029] A further improvement of the present invention is that a muffler communicating with the tire mounting groove is fixedly provided in the space between the edge of the wheel spoke and the tire mounting surface of the rim unit A.

[0030] A further improvement of the present invention is that, in step S7, the muffler is fixed in the annular cavity B between the annular inner sleeve and the tire tread.

[0031] A further improvement of the present invention is that, in steps S12 and S13, an annular connecting sleeve is coaxially fixed to the end face of the spoke facing the rim, and the annular connecting sleeve is coaxially fixedly connected to the connecting flange A or the connecting flange B.

[0032] A further improvement of the present invention is that the connecting flange A and the connecting flange B in step S10, as well as the connecting flange B in step S11, are all fixed by welding and sealing.

[0033] A further improvement of the present invention is that, in step S7, the outer wall of the end edge of the annular inner sleeve away from the flange B and the inner wall of the rim unit B, as well as the edge of the annular boss B after being folded inward and then sealed with the flange B of the annular inner sleeve by welding.

[0034] The wheel hub structure prepared by the wheel hub production method described above includes a rim B formed by splicing and fixing two matching rim units B, and a spoke fixed coaxially at one end of the rim B. The opposing ends of the rim units B are sealed and fixed by connecting flanges B. The rim units B are provided with an annular conical slope plate, a raised ring, a tire mounting surface, and a rim B in sequence along the end direction from the middle of the rim B to their respective ends. A tire mounting groove is formed between the annular conical slope plates. An annular inner sleeve is sealed and fixed coaxially at the position of the tire mounting surface on the inner wall of the rim unit B. An annular cavity B is formed between the annular inner sleeve and the rim unit B. An annular connecting sleeve is fixed coaxially at the edge of the end face of the spoke facing the rim. The annular connecting sleeve is fixedly connected to the connecting flange B.

[0035] A further improvement of the present invention is that the rim B is an annular groove A with the opening facing inward, and the end edge of the flange B of the annular inner sleeve extends into and is fixed in the annular groove A, and the flange B is sealed and fixed to the rim B.

[0036] A further improvement of the present invention is that the outer diameter of the annular connecting sleeve matches the inner diameter of the annular inner sleeve at the end where the spokes are located, and the outer side wall of the annular connecting sleeve away from the spokes is provided with an annular notch coaxially, and the annular notch is fixedly connected to the connecting flange B.

[0037] The wheel hub structure prepared by the wheel hub production method described above includes a rim A, which is spliced ​​and fixed by matching rim units A and rim units B, and a spoke coaxially fixed to the end of rim unit A away from rim unit B. The opposing ends of rim unit A and rim unit B are sealed and fixed by connecting flanges A and B. Rim unit A is provided with an annular conical slope plate, a raised ring, a tire mounting surface, and a rim A in sequence along the direction away from rim unit B. Rim unit B is provided with an annular conical slope plate, a raised ring, a tire mounting surface, and a rim B in sequence along the direction away from rim unit A. A tire mounting groove is formed between the annular conical slope plates. An annular inner sleeve is coaxially sealed and fixed at the position of the tire mounting surface on the inner wall of rim unit B. An annular cavity B is formed between the annular inner sleeve and rim unit B. An annular connecting sleeve is coaxially fixed to the edge of the spoke facing the rim. The annular connecting sleeve is fixedly connected to connecting flanges A and B.

[0038] A further improvement of the present invention is that the rim B is an annular groove A with the opening facing inward, and the end edge of the flange B of the annular inner sleeve extends into and is fixed in the annular groove A, and the flange B is sealed and fixed to the rim B.

[0039] A further improvement of the present invention is that the outer diameter of the annular connecting sleeve matches the inner diameter of the rim unit A, and the outer side wall of the annular connecting sleeve away from the spoke is provided with an annular notch coaxially, and the annular notch is fixedly connected to the connecting flange A and the connecting flange B.

[0040] A further improvement of the present invention is that the annular connecting sleeve forms an annular groove B with the annular conical slope plate, the raised ring, and the tire mounting surface of the rim unit A; when the edge of the spoke is coaxially provided with an annular protrusion, the edge of the annular protrusion is sealed and fixedly connected to the inner wall of the rim unit A at the position corresponding to the tire mounting surface, and the annular protrusion, the annular connecting sleeve, the annular conical slope plate, the raised ring, and the tire mounting surface of the rim unit A form a closed annular cavity A.

[0041] A further improvement of the present invention is that multiple mounting holes are evenly distributed in the middle of the spokes with the shaft center as the center.

[0042] The beneficial effects of this invention are as follows:

[0043] First, the wheel hub production method and wheel hub structure of the present invention allow the wheel rim unit used for splicing wheel rims to be prepared from a cylindrical blank. In order to improve the strength at the tire mounting tread position where it is connected to the tire, it is only necessary to connect and fix it by flanging another cylindrical blank, thereby effectively improving the strength and greatly reducing the weight of the wheel rim.

[0044] Secondly, the wheel hub production method and wheel hub structure of the present invention can form an annular cavity or an annular groove at the tire mounting position regardless of whether the wheel rim end is connected to a spoke, so as to ensure that there is enough space to install a muffler and facilitate the modification into a muffler wheel hub.

[0045] Third, in the wheel hub production method and wheel hub structure of the present invention, the wheel spokes are fixed to the connecting flange of the rim unit through the annular connecting sleeve, thereby minimizing and concentrating the connecting parts of the wheel hub, ensuring the connection sealing effect, improving the connection fixing efficiency, and ensuring the integrity and wholeness of the rest of the wheel hub, thereby further improving the strength.

[0046] Fourth, the wheel hub production method and wheel hub structure of the present invention are very convenient and simple to process through the annular inner sleeve, and the processing cost is very low. Moreover, the positioning and fixing of the annular inner sleeve and the cylindrical blank of the rim unit are also very convenient and simple, thereby reducing the production cost of high-strength wheel hubs.

[0047] Fifth, in the wheel hub production method and wheel hub structure of the present invention, the wheel flange B is directly formed into an annular groove A by folding, and the end edge of the flange B of the annular inner sleeve extends into and is fixed to the annular groove A, thereby improving the strength of the wheel flange B and also playing a positioning role for the annular inner sleeve.

[0048] Sixth, in the wheel hub production method and wheel hub structure of the present invention, the rim unit B is spliced ​​with the rim unit A or another rim unit A to form a rim, thereby allowing for corresponding combination and fixing according to different requirements, thus improving applicability. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the production process of the present invention.

[0050] Figure 2 This is a cross-sectional schematic diagram of Example 1.

[0051] Figure 3 This is a cross-sectional schematic diagram of Example 2.

[0052] Figure 4 This is a cross-sectional schematic diagram of Example 3. Detailed Implementation

[0053] like Figure 1 It can be seen that the wheel hub manufacturing method includes the following steps:

[0054] S1. Prepare a cylindrical blank for a rim unit with a circular cross-section;

[0055] S2. Machin an annular boss A at one end of the cylindrical blank of the rim unit to form a tire mounting groove and a tire mounting surface;

[0056] S3. The tire mounting surface is narrowed to form a raised ring at the connection between the tire mounting groove and the tire mounting surface;

[0057] S4. Fold the cylindrical blank of the rim unit obtained in step S3 outward to form a flange A corresponding to the edge of the tire mounting surface.

[0058] S6. Fold the edge of the flange A of the rim unit cylindrical blank obtained in step S4 toward the side away from the rim cylindrical blank to form an annular boss B.

[0059] S7. Connect the annular inner sleeve with flange B to the rim unit cylindrical blank obtained in step S6 on the same axis, and fix the outer wall of the end edge of the annular inner sleeve away from flange B to the inner wall of the rim unit cylindrical blank. Fold the edge of the annular boss B inward and fix it to the flange B of the annular inner sleeve to form the rim B, so that an annular cavity B is formed between the annular inner sleeve, flange B and the tire surface.

[0060] S9. Fold the edge of the rim unit cylindrical blank obtained in step S7 away from the flange A inward to form the connecting flange B, thus forming the rim unit B.

[0061] S11. The two rim units B obtained in step S9 are coaxially fixed by connecting flange B to form rim B;

[0062] S13. Fix one end of the rim B obtained in step S11 to a spoke on the same axis to form a hub B.

[0063] The method for preparing the annular inner sleeve includes the following steps:

[0064] S61. Prepare an inner sleeve cylindrical blank whose outer diameter matches the inner diameter of the rim unit cylindrical blank;

[0065] S62. Fold the edge of one end of the inner sleeve cylindrical blank obtained in step S62 outward to form a flange B, thereby obtaining an annular inner sleeve.

[0066] The axial length of the annular inner sleeve is greater than the axial length from the connection between the tire mounting groove and the cylindrical blank of the rim unit to the flange A. The outer diameter of the flange B is greater than the diameter of the tire mounting surface and less than or equal to the inner diameter of the annular boss B.

[0067] It also includes the following steps:

[0068] S5. Fold the edge of the flange A of the rim unit cylindrical blank obtained in step S4 to form the rim A;

[0069] S8. Fold the edge of the rim unit cylindrical blank obtained in step S5 away from the flange inward to form the connecting flange A, thus forming the rim unit A.

[0070] S10. The rim unit A obtained in step S8 and the rim unit B obtained in step S9 are fixed coaxially by connecting flange A and connecting flange B to form rim A;

[0071] S12. Fix one end of the rim A obtained in step S10 with spokes coaxially to form a hub A.

[0072] The outer diameter of rim A in step S5 is equal to the outer diameter of rim B in step S7.

[0073] The axial length between rim A and the raised ring in step S5 is equal to the axial length between rim B and the raised ring in step S7.

[0074] The inner diameters of the connecting flange A in step S8 and the connecting flange B in step S9 are equal.

[0075] In step S12, the rim A obtained in step S10 is coaxially fixed with spokes at one end corresponding to the rim unit A to form a hub A.

[0076] A muffler connected to the tire mounting groove is fixedly installed in the space between the edge of the wheel spoke and the tire mounting surface of the rim unit A.

[0077] In step S7, the muffler is fixed in the annular cavity B between the annular inner sleeve and the tire tread.

[0078] In steps S12 and S13, an annular connecting sleeve is fixed coaxially to the end face of the spoke facing the rim, and the annular connecting sleeve is fixedly connected coaxially to the connecting flange A or the connecting flange B.

[0079] In step S10, connecting flange A and connecting flange B, as well as in step S11, are sealed and fixed by welding.

[0080] In step S7, the outer wall of the end edge of the annular inner sleeve away from the flange B and the inner wall of the rim unit B, as well as the edge of the annular boss B after being folded inward and then sealed with the flange B of the annular inner sleeve by welding, are all sealed and fixed.

[0081] like Figure 2 As can be seen, the wheel hub structure prepared by the wheel hub production method described above includes a wheel rim B, which is spliced ​​and fixed by two matching wheel rim units B2, and a spoke 4 fixed coaxially at one end of the wheel rim B. The opposing ends of the wheel rim units B2 are sealed and fixed by connecting flanges B10. The wheel rim units B2 are provided with annular conical slope plate 5, raised ring 6, tire mounting surface 8 and wheel flange B12 in sequence along the end direction from the middle of the wheel rim B to their respective ends. Tire mounting grooves 11 are formed between the annular conical slope plates 5. Annular inner sleeves 3 are coaxially sealed and fixed at the positions corresponding to the tire mounting surface 8 on the inner wall of the wheel rim units B2. Annular cavity B14 is formed between the annular inner sleeves 3 and the wheel rim units B2. Annular connecting sleeves 15 are coaxially fixed to the edge of the spoke 4 facing the wheel rim. The annular connecting sleeves 15 are fixedly connected to the connecting flanges B10.

[0082] The rim B12 is an annular groove A with the opening facing inward. The end edge of the flange B13 of the annular inner sleeve 3 extends into and is fixed in the annular groove A. The flange B13 is sealed and fixed to the rim B12.

[0083] The outer diameter of the annular connecting sleeve 15 matches the inner diameter of the annular inner sleeve 3 at the end where the spoke 4 is located. The outer side wall of the annular connecting sleeve 15 away from the spoke 4 is provided with an annular notch 16 coaxially. The annular notch 16 is fixedly connected to the connecting flange B10.

[0084] The edge of the spoke 4 extends to the edge of the rim B12 of the rim unit B2 at the end where the spoke 4 is located, and the outer edge of the spoke 4 and the outer wall of the annular connecting sleeve 15 match the inner wall of the annular inner sleeve of the rim unit B2 at the end where the spoke 4 is located.

[0085] like Figure 3 and Figure 4As can be seen, the wheel hub structure prepared by the wheel hub production method described above includes a wheel rim A, which is spliced ​​and fixed by matching wheel rim units A1 and B2, and a spoke 4 coaxially fixed to the end of wheel rim unit A1 away from wheel rim unit B2. The opposing ends of wheel rim unit A1 and wheel rim unit B2 are sealed and fixed by connecting flanges A9 and B10. Wheel rim unit A1 is provided with an annular conical slope plate 5, a raised ring 6, a tire mounting surface 8, and a rim A7 in sequence along the direction away from wheel rim unit B2. Wheel rim unit B2... 2. Along the direction away from the rim unit A1, an annular conical slope plate 5, a raised ring 6, a tire mounting surface 8, and a rim B12 are arranged in sequence. A tire mounting groove 11 is formed between the annular conical slope plates 5. An annular inner sleeve 3 is coaxially sealed and fixed at the position corresponding to the tire mounting surface 8 on the inner wall of the rim unit B2. An annular cavity B14 is formed between the annular inner sleeve 3 and the rim unit B2. An annular connecting sleeve 15 is coaxially fixed to the edge of the end face of the spoke 4 facing the rim. The annular connecting sleeve 15 is fixedly connected to the connecting flange A9 and the connecting flange B10.

[0086] The rim B12 is an annular groove A with the opening facing inward. The end edge of the flange B13 of the annular inner sleeve 3 extends into and is fixed in the annular groove A. The flange B13 is sealed and fixed to the rim B12.

[0087] The outer diameter of the annular connecting sleeve 15 matches the inner diameter of the rim unit A1. The outer side wall of the annular connecting sleeve 15 away from the spoke 4 is provided with an annular notch 16 coaxially. The annular notch 16 is fixedly connected to the connecting flange A9 and the connecting flange B10.

[0088] The annular connecting sleeve 15 forms an annular groove B20 with the annular conical slope plate 5, the raised ring 6, and the tire mounting surface 8 of the rim unit A1; when the edge of the spoke 4 is coaxially provided with an annular protrusion 17, the edge of the annular protrusion 17 is sealed and fixedly connected to the inner wall of the rim unit A1 at the position corresponding to the tire mounting surface 8, and the annular protrusion 17, the annular connecting sleeve 15, the annular conical slope plate 5, the raised ring 6, and the tire mounting surface 8 of the rim unit A1 form a closed annular cavity A18.

[0089] The spokes 4 have multiple mounting holes 19 evenly distributed around the axle. Example 1

[0090] like Figure 2As shown, the hub structure includes a rim B formed by splicing and fixing two matching rim units B2, and a spoke 4 coaxially fixed at one end of the rim B. The opposing ends of the rim units B2 are sealed and fixed by connecting flanges B10. The rim units B2 are provided with an annular conical slope plate 5, a raised ring 6, a tire mounting surface 8, and a rim B12 in sequence along the end direction from the middle of the rim B to their respective ends. A tire mounting groove 11 is formed between the annular conical slope plates 5. An annular inner sleeve 3 is coaxially sealed and fixed at the position corresponding to the tire mounting surface 8 on the inner wall of the rim unit B2. An annular cavity B14 is formed between the annular inner sleeve 3 and the rim unit B2. An annular connecting sleeve 15 is coaxially fixed to the edge of the spoke 4 facing the rim. The annular connecting sleeve 15 is fixedly connected to the connecting flange B10.

[0091] The rim B12 is an annular groove A with the opening facing inward. The end edge of the flange B13 of the annular inner sleeve 3 extends into and is fixed in the annular groove A. The flange B13 is sealed and fixed to the rim B12.

[0092] The outer diameter of the annular connecting sleeve 15 matches the inner diameter of the annular inner sleeve 3 at the end where the spoke 4 is located. The outer side wall of the annular connecting sleeve 15 away from the spoke 4 is provided with an annular notch 16 coaxially. The annular notch 16 is fixedly connected to the connecting flange B10.

[0093] The edge of the spoke 4 extends to the edge of the rim B12 of the rim unit B2 at the end where the spoke 4 is located, and the outer edge of the spoke 4 and the outer wall of the annular connecting sleeve 15 match the inner wall of the annular inner sleeve of the rim unit B2 at the end where the spoke 4 is located.

[0094] The spokes 4 have multiple mounting holes 19 evenly distributed around the axle. Example 2

[0095] like Figure 3As can be seen, the wheel hub structure includes a wheel rim A, which is spliced ​​and fixed by matching wheel rim units A1 and B2, and a spoke 4 coaxially fixed to the end of wheel rim unit A1 away from wheel rim unit B2. The opposing ends of wheel rim unit A1 and wheel rim unit B2 are sealed and fixed by connecting flanges A9 and B10. Wheel rim unit A1 is provided with an annular conical slope plate 5, a raised ring 6, a tire mounting surface 8, and a rim A7 in sequence along the direction away from wheel rim unit B2. Wheel rim unit B2 is provided with a spoke 4 along the direction away from wheel rim unit B2. A1 is provided with an annular conical slope plate 5, a raised ring 6, a tire mounting surface 8 and a rim B12 in sequence. A tire mounting groove 11 is formed between the annular conical slope plates 5. An annular inner sleeve 3 is coaxially sealed and fixed at the position corresponding to the tire mounting surface 8 on the inner wall of the rim unit B2. An annular cavity B14 is formed between the annular inner sleeve 3 and the rim unit B2. An annular connecting sleeve 15 is coaxially fixed to the edge of the end face of the spoke 4 facing the rim. The annular connecting sleeve 15 is fixedly connected to the connecting flange A9 and the connecting flange B10.

[0096] The rim B12 is an annular groove A with the opening facing inward. The end edge of the flange B13 of the annular inner sleeve 3 extends into and is fixed in the annular groove A. The flange B13 is sealed and fixed to the rim B12.

[0097] The outer diameter of the annular connecting sleeve 15 matches the inner diameter of the rim unit A1. The outer side wall of the annular connecting sleeve 15 away from the spoke 4 is provided with an annular notch 16 coaxially. The annular notch 16 is fixedly connected to the connecting flange A9 and the connecting flange B10.

[0098] The annular connecting sleeve 15 forms an annular groove B20 with the annular conical slope plate 5, the raised ring 6, and the tire mounting surface 8 of the rim unit A1.

[0099] The spokes 4 have multiple mounting holes 19 evenly distributed around the axle. Example 3

[0100] like Figure 4As can be seen, the wheel hub structure includes a wheel rim A, which is spliced ​​and fixed by matching wheel rim units A1 and B2, and a spoke 4 coaxially fixed to the end of wheel rim unit A1 away from wheel rim unit B2. The opposing ends of wheel rim unit A1 and wheel rim unit B2 are sealed and fixed by connecting flanges A9 and B10. Wheel rim unit A1 is provided with an annular conical slope plate 5, a raised ring 6, a tire mounting surface 8, and a rim A7 in sequence along the direction away from wheel rim unit B2. Wheel rim unit B2 is provided with a spoke 4 along the direction away from wheel rim unit B2. A1 is provided with an annular conical slope plate 5, a raised ring 6, a tire mounting surface 8 and a rim B12 in sequence. A tire mounting groove 11 is formed between the annular conical slope plates 5. An annular inner sleeve 3 is coaxially sealed and fixed at the position corresponding to the tire mounting surface 8 on the inner wall of the rim unit B2. An annular cavity B14 is formed between the annular inner sleeve 3 and the rim unit B2. An annular connecting sleeve 15 is coaxially fixed to the edge of the end face of the spoke 4 facing the rim. The annular connecting sleeve 15 is fixedly connected to the connecting flange A9 and the connecting flange B10.

[0101] The rim B12 is an annular groove A with the opening facing inward. The end edge of the flange B13 of the annular inner sleeve 3 extends into and is fixed in the annular groove A. The flange B13 is sealed and fixed to the rim B12.

[0102] The outer diameter of the annular connecting sleeve 15 matches the inner diameter of the rim unit A1. The outer side wall of the annular connecting sleeve 15 away from the spoke 4 is provided with an annular notch 16 coaxially. The annular notch 16 is fixedly connected to the connecting flange A9 and the connecting flange B10.

[0103] The spoke 4 has an annular protrusion 17 coaxially arranged on the outer edge. The edge of the annular protrusion 17 is sealed and fixedly connected to the inner wall of the rim unit A1 at the position corresponding to the tire mounting surface 8. The annular protrusion 17, the annular connecting sleeve 15, the annular conical slope plate 5, the protruding ring 6, and the tire mounting surface 8 of the rim unit A1 form a closed annular cavity A18.

[0104] The spokes 4 have multiple mounting holes 19 evenly distributed around the axle.

Claims

1. A method of producing a wheel hub, characterized by Includes the following steps: S1. Prepare a cylindrical blank for a rim unit with a circular cross-section; S2. Machin an annular boss A at one end of the cylindrical blank of the rim unit to form a tire mounting groove and a tire mounting surface; S3. The tire mounting surface is narrowed to form a raised ring at the connection between the tire mounting groove and the tire mounting surface; S4. Fold the cylindrical blank of the rim unit obtained in step S3 outward to form a flange A corresponding to the edge of the tire mounting surface. S6. Fold the edge of the flange A of the rim unit cylindrical blank obtained in step S4 toward the side away from the rim cylindrical blank to form an annular boss B. S7. Connect the annular inner sleeve with flange B to the rim unit cylindrical blank obtained in step S6 on the same axis, and fix the outer wall of the end edge of the annular inner sleeve away from flange B to the inner wall of the rim unit cylindrical blank. Fold the edge of the annular boss B inward and fix it to the flange B of the annular inner sleeve to form a rim B, so that an annular cavity B is formed between the annular inner sleeve, flange B and tire surface. S9. Fold the edge of the rim unit cylindrical blank obtained in step S7 away from the flange A inward to form the connecting flange B, thus forming the rim unit B. S11. The two rim units B obtained in step S9 are coaxially fixed by connecting flange B to form rim B; S13. Fix one end of the rim B obtained in step S11 to a spoke on the same axis to form a hub B.

2. The wheel hub production method according to claim 1, characterized by: It also includes the following steps: S5. Fold the edge of the flange A of the rim unit cylindrical blank obtained in step S4 outward to form the rim A; S8. Fold the edge of the rim unit cylindrical blank obtained in step S5 away from the flange inward to form the connecting flange A, thus forming the rim unit A. S10. The rim unit A obtained in step S8 and the rim unit B obtained in step S9 are fixed coaxially by connecting flange A and connecting flange B to form rim A; S12. Fix one end of the rim A obtained in step S10 with spokes coaxially to form a hub A.

3. The wheel hub production method according to claim 2, characterized by: In step S12, the rim A obtained in step S10 is coaxially fixed with spokes at one end corresponding to the rim unit A to form a hub A.

4. The wheel structure produced by the wheel production method according to claim 1, characterized by: The rim B consists of two matching rim units B (2) spliced ​​and fixed together, and spokes (4) fixed coaxially at one end of the rim B. The opposing ends of the rim units B (2) are sealed and fixed by connecting flanges B (10). The rim units B (2) are provided with annular conical slope plate (5), protruding ring (6), tire mounting surface (8) and rim B (12) in sequence along the end direction from the middle of the rim B to their respective ends. Tire mounting grooves (11) are formed between the annular conical slope plates (5). Annular inner sleeves (3) are sealed and fixed coaxially at the positions corresponding to the tire mounting surface (8) on the inner wall of the rim unit B (2). Annular cavity B (14) is formed between the annular inner sleeve (3) and the rim unit B (2). Annular connecting sleeves (15) are fixed coaxially at the edge of the spokes (4) facing the rim. The annular connecting sleeves (15) are fixedly connected to the connecting flanges B (10).

5. The wheel structure of claim 4, wherein: The rim B (12) is an annular groove A with the opening facing inward. The end edge of the flange B (13) of the annular inner sleeve (3) extends into and is fixed in the annular groove A. The flange B (13) is sealed and fixed to the rim B (12).

6. The wheel structure of claim 4, wherein: The outer diameter of the annular connecting sleeve (15) matches the inner diameter of the annular inner sleeve (3) at the end where the spoke (4) is located. The outer side wall of the annular connecting sleeve (15) away from the spoke (4) is coaxially provided with an annular notch (16), and the annular notch (16) is fixedly connected to the connecting flange B (10).

7. The wheel structure produced by the wheel production method according to any one of claims 2 to 3, characterized by: The wheel includes a rim A, which is formed by splicing and fixing rim units A (1) and B (2) that match each other, and a spoke (4) that is coaxially fixed to the end of rim unit A (1) away from rim unit B (2). The opposing ends of rim unit A (1) and rim unit B (2) are sealed and fixed by connecting flange A (9) and connecting flange B (10). Rim unit A (1) is provided with an annular conical slope plate (5), a raised ring (6), a tire mounting surface (8) and a rim A (7) in sequence along the direction away from rim unit B (2). Rim unit B (2) is provided with an annular conical slope plate (5), a raised ring (6), a tire mounting surface (8) and a rim A (7) in the direction away from rim unit A (1). The wheel rim unit B (2) is provided with an annular conical slope plate (5), a raised ring (6), a tire mounting surface (8) and a rim B (12) in sequence. A tire mounting groove (11) is formed between the annular conical slope plates (5). An annular inner sleeve (3) is coaxially sealed and fixed at the position corresponding to the tire mounting surface (8) on the inner wall of the rim unit B (2). An annular cavity B (14) is formed between the annular inner sleeve (3) and the rim unit B (2). An annular connecting sleeve (15) is coaxially fixed at the edge of the end face of the spoke (4) facing the rim. The annular connecting sleeve (15) is fixedly connected to the connecting flange A (9) and the connecting flange B (10).

8. The wheel structure of claim 7, wherein: The rim B (12) is an annular groove A with the opening facing inward. The end edge of the flange B (13) of the annular inner sleeve (3) extends into and is fixed in the annular groove A. The flange B (13) is sealed and fixed to the rim B (12).

9. The wheel structure of claim 7, wherein: The outer diameter of the annular connecting sleeve (15) matches the inner diameter of the rim unit A (1). The outer side wall of the annular connecting sleeve (15) away from the spoke (4) is provided with an annular notch (16) on the same axis. The annular notch (16) is fixedly connected to the connecting flange A (9) and the connecting flange B (10).

10. The wheel structure of claim 7, wherein: The annular connecting sleeve (15) forms an annular groove B (20) with the annular conical slope plate (5), protruding ring (6), and tire mounting surface (8) of the rim unit A (1).

11. The wheel structure of claim 7, wherein: The spokes (4) have an annular protrusion (17) on the outer coaxial side. The edge of the annular protrusion (17) is sealed and fixedly connected to the inner wall of the rim unit A (1) at the position corresponding to the tire surface (8). The annular protrusion (17), the annular connecting sleeve (15), the annular conical slope plate (5), the protrusion ring (6), and the tire surface (8) of the rim unit A (1) form a closed annular cavity A (18).

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