Bicycle handlebar and manufacturing method thereof

Abstract

The invention belongs to the technical field of metal piece machining, and particularly relates to a bicycle handlebar and a manufacturing method thereof.The bicycle handlebar comprises a handlebar body, handlebar parts bent downwards are formed at the two ends of the handlebar body, an axle connecting part is formed in the middle of the handlebar body, and a cross arm part is formed between the handlebar parts and the axle connecting part; the included angle between the cross arm part and the axis of the axle connecting part is 2-6 degrees; according to the handlebar, the design that the wall thickness of the axle connecting part is large is adopted, so that the handlebar has better stress capacity and impact resistance, the cross arm part and the axle connecting part form an included angle, the wind breaking capacity is improved, the wind resistance during riding is reduced, the handlebar part and the cross arm part are small in wall thickness, the weight of the handlebar is fully reduced, riding is more labor-saving and convenient, and the service life of the handlebar is prolonged. A traditional manufacturing process is improved, a spinning machining mode is combined, and the limitation that the diameter and the wall thickness of a traditional bicycle handlebar are uniform is eliminated through multi-stage spinning, pipe bending and electroplating.

Description

Technical Field

[0001] The invention belongs to the technical field of metal parts processing, and particularly relates to a bicycle handlebar and a manufacturing method thereof. Background Art

[0002] The bicycle handlebar is an important component connecting the front fork and the wheel of the bicycle. It is not only a key component for the rider to control the direction of the vehicle, but also one of the main parts that come into contact with the body while riding. The design of the handlebar directly affects the comfort, safety and controllability of riding.

[0003] The bicycle riding environment is different, and the handlebar design is also very diverse. There are many types of bicycle handlebars, which are mainly designed and classified according to the purpose of the bicycle and the needs of the rider. Some common types of bicycle handlebars: flat handlebars, curved handlebars, rising handlebars, drop handlebars, mountain bike handlebars, straddle handlebars, short handlebars, etc. Taking mountain bike handlebars as an example, the prior art generally adds a supporting pipe in the stress-bearing part in the middle of the handlebar, then uses a water swelling process to shape the metal pipe, and finally bends the pipe to form the handlebar shape; However, due to process limitations, the handlebars processed in this way have a simple structure, and the overall cross-sectional diameter of the handlebars is the same; and the internal supporting pipes and the handlebars are difficult to fully combine, resulting in the supporting pipes and the handlebars being easily offset when the handlebars are subjected to force, affecting the force and balance of the handlebars. In addition, the structure and quality of the handlebars depend on the mold, and the handlebars need to be frequently fine-tuned during the development and design stage, resulting in high mold costs.

[0004] In order to solve the above problems, the present application proposes a bicycle handlebar and a manufacturing method thereof. Summary of the invention

[0005] To solve the problems raised in the above background technology, the present invention provides a bicycle handlebar and a manufacturing method thereof, which has the characteristics of simple operation, convenient shaping, better pressure resistance and wind-breaking performance, and variable diameter and wall thickness.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a bicycle handlebar, comprising a handlebar body, wherein both ends of the handlebar body are formed with downwardly bent handle portions, an axle connecting portion is formed in the middle position of the handlebar body, and a cross arm portion is formed between the handle portion and the axle connecting portion, and the angle between the cross arm portion and the axis of the axle connecting portion is 2° to 6°.

[0007] As a preferred bicycle handlebar of the present invention, the handlebar body is a variable diameter pipe obtained by spinning a light alloy pipe, and the cross section of the handlebar body has at least two diameters.

[0008] As a preferred bicycle handlebar of the present invention, the transition between the cross arm portion and the axle connecting portion is a tapered structure.

[0009] As a preferred bicycle handlebar of the present invention, the wall thickness of the cross arm portion is at least half of the wall thickness of the axle connecting portion.

[0010] As a preferred bicycle handlebar of the present invention, the surfaces of the handle portion and the cross arm portion are rolled with patterns.

[0011] The present invention also includes a method for manufacturing a bicycle handlebar, comprising the following steps: S1. Cut the pipe blank according to the designed length; S2. The pipe fitting is mounted on the spinning equipment, and a variable diameter pipe fitting, i.e., a handlebar blank, is obtained after spinning according to the cross-sectional diameter parameters and wall thickness parameters of the handlebar; S3. Bending the pipe, bending both ends of the handlebar blank to form the handle portion, and then bending the transition between the cross arm portion and the axle connecting portion to form a wind-breaking structure; S4. Measure the size parameters of finished products and eliminate defective products; S5. Surface treatment; S6. Assemble other parts on the handlebar; S7. Overall packaging.

[0012] As a preferred method for manufacturing a bicycle handlebar of the present invention, S2 comprises the following steps, specifically: After the pipe fitting is clamped, the middle part of the pipe fitting is spun first, and the axle connection part is processed according to the designed diameter and wall thickness. The axle connection part is spun toward both ends of the pipe fitting to form a tapered structural transition between the cross arm part and the axle connection part; the handle part and the cross arm part are spun according to the designed diameter and wall thickness.

[0013] As a preferred method for manufacturing a bicycle handlebar of the present invention, the wind-breaking structure in S3 is a forward convex structure composed of a cross arm portion and an axle connecting portion, and the angle between the axes of the cross arm portion and the axle connecting portion is 2° to 6°.

[0014] As a preferred method for manufacturing a bicycle handlebar of the present invention, S5 comprises the following steps, specifically: S5.1 Use knurling to roll out patterns on the handlebar grip and cross arm surface; S5.2 uses electroplating to create a rust-proof layer on the entire handlebar; S5.3 Surface painting.

[0015] As a preferred method for manufacturing a bicycle handlebar of the present invention, S6 includes: putting a handlebar cover on the handle portion, and installing a connecting structure at the axle connecting portion.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The handlebar of the present invention adopts a thicker wall design at the axle connection part, so that it has better force bearing capacity and impact resistance. The cross arm part and the axle connection part form an angle to improve the wind breaking ability and reduce the wind resistance during riding. The handle part and the cross arm part adopt a thinner wall thickness to fully reduce the weight of the handlebar, making riding more labor-saving and light. Since the handlebar is manufactured by processing a pipe fitting without other connection structures, the reliability of the handlebar is further improved. The present invention improves the traditional manufacturing process, combines it with the spinning processing method, and squeezes the two sides of the axle connection part through the pressure wheel of the spinning machine, so that the cross arm part of the pipe reaches the set wall thickness, and at the same time the cross arm part is deformed by pressure, the diameter is reduced, and the metal material extends to both sides, so that the diameter and wall thickness can be adjusted. After the cross arm part is processed, it is spun so that the diameter and wall thickness of the handle can be changed again, which is convenient for designing and manufacturing the boss structure on the handlebar, and no welding or cutting is required to achieve an integrated design. After the handlebar is spun, it is bent, electroplated, and other processes are performed, so that the processed bicycle handlebar has a more comfortable grip, better force strength, and wind-breaking performance, and gets rid of the limitation of the uniform diameter and wall thickness of traditional bicycle handlebars, which is convenient for reasonable design of the force and weight distribution of the handlebar. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the handlebar structure of the present invention; Figure 2 It is a cross-sectional view of the axle connection portion AA of the handlebar of the present invention before being bent; Figure 3 It is a schematic structural diagram of a cross arm portion and an axle connecting portion in one embodiment of the present invention; Figure 4 It is a structural schematic diagram of a cross arm portion and an axle connection portion in another embodiment of the present invention; Figure 5 It is a cross-sectional view of the axle connection portion of the prior art; In the figure: 10, handlebar body; 11, grip portion; 12, cross arm portion; 13, axle connecting portion. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figures 1 to 4 As shown; A bicycle handlebar comprises a handlebar body 10, wherein two ends of the handlebar body 10 are formed with grip portions 11 bent downward, an axle connection portion 13 is formed in the middle of the handlebar body 10, a cross arm portion 12 is formed between the grip portion 11 and the axle connection portion 13, and an axis angle between the cross arm portion 12 and the axle connection portion 13 is 2° to 6°; In this embodiment: the existing common handlebar internal structure is as follows: Figure 5 As shown, the axle connection part 13 of the handlebar is used to connect the front fork and the stem of the bicycle. The upper part of the handlebar bears the pressure of the rider, while the lower part bears the impact caused by the bumps from the ground. Therefore, a reinforcement structure needs to be added inside during the design to improve the bearing capacity and durability of the handlebar.

[0020] The handlebar of the present invention is based on a thicker pipe, which is formed into a pipe with a thicker middle part and thinner ends after spinning treatment. The handlebar adopts an integrated structure design. The handlebar includes a handle part 11, a cross arm part 12 and an axle connection part 13. The handlebar is gradually transitioned from a pipe to form an integrated structure, so that no other connecting parts or discrete components are required. The handlebar is formed in one piece, which simplifies the process and improves the stability of the handlebar. This design not only enhances the overall strength of the handlebar, but also effectively avoids deformation caused by bumps or other external factors in daily use, thereby making the structure more stable. The thickness of the middle part of the handlebar increases its anti-bending and anti-torsion capabilities, so that it can maintain good performance even in intense riding or on uneven roads. In addition, there is an angle of 2° to 6° between the cross arm part 12 and the axle connection part 13. This design forms a protruding structure, which can effectively break the wind and reduce wind resistance during riding. When riding at high speed, the angle between the rider's body posture and the handlebar can optimize air flow, reduce air resistance, and improve riding efficiency.

[0021] More specifically: In an optional embodiment, the handlebar body 10 is a variable diameter tube made of a light alloy tube by spinning, and the cross section of the handlebar body 10 has at least two diameters, for example, the diameters of the axle connection portion 13 and the cross arm portion 12 are different.

[0022] In this embodiment: through this design, the handlebar body 10 forms a boss structure at different diameter positions, which not only enhances the functionality of the handlebar, but also improves its application flexibility. The boss structure forms an effective axial limit on the surface of the handlebar, so when installing other handlebar accessories such as lights, bells or beverage holders, the stability of the accessories will be significantly improved. Specifically, when installing a riding light, the boss structure at the installation position can effectively prevent the light from sliding or rotating laterally during riding, ensuring that the light always remains at the desired lighting angle, thereby enhancing the safety and convenience of riding.

[0023] This variable diameter design makes the connection between the handlebar and other parts more secure, preventing accessories from loosening or accidentally falling off due to bumps and vibrations during riding. In addition, the boss structure allows riders to flexibly choose the appropriate installation position according to personal needs and actual usage, thereby facilitating the rapid disassembly and replacement of different accessories and improving the overall user experience.

[0024] Going further: In an optional embodiment, the transition between the cross arm portion 12 and the axle connecting portion 13 is a tapered structure.

[0025] In this embodiment: through this design, the cross arm portion 12 and the axle connection portion 13 have a smooth transition, which reduces the difficulty of the spinning process and facilitates the smooth transmission of the pressure generated by the rider on the handlebar to the axle connection portion 13. In addition, this conical structure guides the air during riding, which can reduce riding wind resistance and improve the vehicle's wind-breaking ability.

[0026] Going further: In an optional embodiment, the wall thickness of the transverse arm portion 12 is at least half of the wall thickness of the axle connecting portion 13 .

[0027] In this embodiment: because the rider places both hands on both sides of the handlebars when riding, pressure is applied to both ends of the handlebars, that is, the cross arm portion 12 bears half of the rider's pressure, and the axle connection portion 13 is connected to the front fork and the stem, and bears all the rider's pressure as a fulcrum. Therefore, a higher strength axle connection portion 13 is designed to ensure that the handlebars are stable during riding and have sufficient strength to withstand pressure and ground impact force, thereby improving the safety and reliability of the riding handlebars.

[0028] Going further: In an optional embodiment, the surfaces of the handle portion 11 and the cross arm portion 12 are rolled with patterns.

[0029] In this embodiment: through surface knurling treatment, the patterns on the surfaces of the handle portion 11 and the cross arm portion 12 increase the friction coefficient, which facilitates the installation of the handle cover on the handle portion 11 and other accessories on the cross arm portion 12, thereby improving the connection reliability between the handlebar accessories and the handlebar and preventing slipping and loosening.

[0030] In combination with the above content, the present invention also includes a method for manufacturing a bicycle handlebar, comprising the following steps: S1. Cut the pipe blank according to the designed length; S2. The pipe fitting is mounted on the spinning equipment, and a variable diameter pipe fitting, i.e., a handlebar blank, is obtained after spinning according to the cross-sectional diameter parameters and wall thickness parameters of the handlebar; S3. Bend the pipe, bend both ends of the handlebar blank to form a handle portion 11, and then bend the transition between the cross arm portion 12 and the axle connecting portion 13 to form a wind-breaking structure; S4. Measure the size parameters of finished products and eliminate defective products; S5. Surface treatment; S6. Assemble other parts on the handlebar; S7. Overall packaging.

[0031] In this embodiment: the existing handlebar manufacturing method mainly adopts the water swelling process, which forms different diameters by blowing up the pipe in the mold. However, this method has difficulties in controlling the wall thickness of the handlebar, and the shape of the processed pipe is relatively simple. At the same time, the requirements for the mold are also high, which is very inconvenient during the handlebar design and development stage. Therefore, traditional processes usually limit the flexibility and innovation of the design.

[0032] The present invention adopts a spinning process, and by processing the pipe fitting according to the design parameters, the manufacturing cost of the mold is significantly reduced. At the same time, the wall thickness and diameter changes of the handlebar can be effectively controlled, and the operation is simple and the cost is low. Specifically, in this scheme, the pressure wheel of the spinning machine squeezes the two sides of the axle connection part 13, so that the cross arm part 12 of the pipe fitting reaches the set wall thickness. At the same time, the cross arm part 12 is deformed by pressure, the diameter is reduced, and the metal material extends to both sides. By controlling the parameters of the spinning machine and changing the travel amount, the diameter and wall thickness can be adjusted. After the cross arm part 12 is processed, the diameter and wall thickness of the handle part 11 can be changed again through spinning, which is convenient for designing and manufacturing the boss structure on the handlebar, without welding and cutting, to achieve an integrated design, which not only provides sufficient strength for the handlebar, but also provides a guarantee for high-intensity riding.

[0033] During the design process, the wall thickness between the handle portion 11 and the cross arm portion 12 can be spun according to actual needs to achieve a design of multiple diameters. Since the handle portion 11 and the cross arm portion 12 bear pressure evenly during use, excessive wall thickness is not required, which can effectively reduce the overall weight of the handlebar while maintaining its structural strength. This method makes the manufacture of the entire handlebar more efficient and meets the modern lightweight requirements.

[0034] After the spinning process is completed, the pipe bending operation is performed next to complete the shape of the handle portion 11. During the pipe bending process, a certain angle is formed between the cross arm portion 12 and the axle connecting portion 13. This design is not only beautiful, but also can effectively improve the wind-breaking performance of the handlebar, reduce wind resistance during riding, and improve riding comfort and efficiency.

[0035] This innovative processing technology not only reduces the difficulty of manufacturing complex handlebars, but also improves production efficiency. This spinning process optimized for handlebar design significantly improves the functionality, reliability and economy of the product, allowing manufacturers to respond to market demands more flexibly and promote the continuous progress and innovation of cycling equipment.

[0036] Going further: In an optional embodiment, S2 includes the following steps, specifically: After the pipe fitting is clamped, the middle part of the pipe fitting is spun first, and the axle connection part 13 is processed according to the designed diameter and wall thickness. The axle connection part 13 is spun toward both ends of the pipe fitting to form a tapered structural transition between the cross arm part 12 and the axle connection part 13; the handle part 11 and the cross arm part 12 are spun according to the designed diameter and wall thickness.

[0037] In this embodiment: when spinning the handlebar, spinning is started from the middle to both sides, and the ductility of the metal is used to extend the pipe material to both sides, which is convenient for controlling the wall thickness of the handlebar and avoiding material accumulation during the spinning process to cause waste products. At the same time, different diameters can be processed and smooth switching of diameters can be achieved through a tapered transition structure.

[0038] Going further: In an optional embodiment, the wind-breaking structure in S3 is a forward convex structure composed of a transverse arm portion 12 and an axle connecting portion 13, and the angle between the axes of the transverse arm portion 12 and the axle connecting portion 13 is 2° to 6°.

[0039] In the present embodiment: this convex structure improves the wind-breaking performance of riding, and the axial angle between the cross arm portion 12 and the axle connecting portion 13 is 2° to 6°. If the angle is too large, the handlebars will be moved backward, affecting the riding posture, and if the angle is too small, the wind-breaking effect will be poor.

[0040] Going further: In an optional embodiment, S5 includes the following steps, specifically: S5.1 Use knurling to roll out patterns on the surfaces of the handlebar grip portion 11 and the cross arm portion 12; S5.2 uses electroplating to create a rust-proof layer on the entire handlebar; S5.3 Surface painting.

[0041] In this embodiment, the friction coefficient of the handlebar surface is increased by knurling, which is to ensure that the clamping accessories are more stable when installed on the handlebar. The knurling increases the contact area by forming tiny concave and convex textures on the handlebar surface, thereby effectively improving the friction. This improvement can prevent the clamping accessories from accidentally sliding or loosening during riding, ensuring that the rider can get full support and confidence when performing various operations, improving safety and convenience. For example, when installing a riding light, a mobile phone holder or a water bottle holder, the knurled surface can ensure that these accessories are fixed more securely.

[0042] In addition, electroplating and painting the handlebars can not only improve their performance, but also significantly enhance their aesthetics. Electroplating can form a uniform metal protective film on the handlebar surface to resist corrosion, oxidation and wear, thereby extending the service life of the handlebar and making it more shiny in appearance. For example, chrome plating not only provides better corrosion resistance, but also brings a mirror-like shiny effect, enhancing the visual appeal of the entire vehicle.

[0043] Spray painting can provide a variety of color options, allowing users to customize the appearance of the handlebar according to personal preferences. High-quality spray paint not only provides rich colors, but also has good adhesion and scratch resistance, which helps to further improve the durability and wear resistance of the handlebar. In addition, through appropriate coatings, different visual effects such as matte, glossy or metallic texture can be achieved, enhancing the market competitiveness of the product.

[0044] Going further: In an optional embodiment, S6 includes: putting a handlebar cover on the handle portion 11 and installing a connecting structure on the axle connecting portion 13 .

[0045] In this embodiment, the handlebar is installed on the stem through a connecting structure, which is a screw and a clamp block commonly found on the market. The clamp block is engaged with the axle connecting portion 13 and is fixed to the stem through screws, which facilitates the installation and fixation of the handlebar of the present invention to the stem.

[0046] In an optional embodiment, if Figure 4As shown, the total length of the cross arm portion 12 and the axle connection portion 13 is 600 mm, the angle between the cross arm portion 12 and the axle connection portion 13 is 2°, the length of the axle connection portion 13 is 60 mm, and the transition from the axle connection portion 13 to the cross arm portion 12 is a conical surface.

[0047] In this embodiment: the distance between the two handlebars 11 is 600mm, which is suitable for riding by most people on the market. The length of the axle connecting portion 13 is 60mm, which is convenient for installing the connecting structure, so that the handlebar of the present invention can be installed on the stem firmly and stably, and can be adapted to most stems on the market. The wall thickness at the axle connecting portion 13 is 4mm, which has sufficient strength and is relatively light. The wall thickness of the handlebar 11 and the cross arm portion 12 is 2mm, and it is made of aluminum alloy, which further makes the handlebar lightweight and convenient for riding.

[0048] The working principle and use process of the present invention: the common internal structure of the handlebar is as follows: Figure 5 As shown, the axle connection part 13 of the handlebar is used to connect the front fork and the stem of the bicycle. The upper part of the handlebar bears the pressure of the rider, while the lower part bears the impact caused by the bumps from the ground. Therefore, a reinforcement structure needs to be added inside during the design to improve the bearing capacity and durability of the handlebar.

[0049] The handlebar of the present invention is based on a thicker pipe, which is formed into a pipe with a thicker middle part and thinner ends after a spinning process, and adopts an integrated structural design. This design not only enhances the overall strength of the handlebar, but also effectively avoids deformation caused by bumps or other external factors in daily use, thereby making the structure more stable. The thickness of the middle part of the handlebar increases its ability to resist bending and torsion, so that it can maintain good performance even during intense riding or on uneven roads. In addition, there is an angle of 2° to 6° between the cross arm portion 12 and the axle connection portion 13. This design forms a protruding structure that can effectively break the wind and reduce wind resistance during riding. When riding at high speed, the angle between the rider's body posture and the handlebar can optimize air flow, reduce air resistance, and improve riding efficiency.

[0050] Some handlebar manufacturing methods mainly use the water swelling process, which is to blow up the pipe in the mold to form different diameters. However, this method has difficulties in controlling the wall thickness of the handlebar, and the shape of the processed pipe is relatively simple. At the same time, the requirements for the mold are also high, which is very inconvenient during the handlebar design and development stage. Therefore, traditional processes usually limit the flexibility and innovation of the design.

[0051] The present invention adopts a spinning process, and by processing the pipe according to the design parameters, the manufacturing cost of the mold is significantly reduced, and at the same time, the wall thickness and diameter change of the handlebar can be effectively controlled, and the operation is simple and the cost is low. Specifically, in this solution, by spinning the middle part of the pipe toward both sides, a thicker wall thickness can be formed at the axle connection part 13, which not only provides sufficient strength for the handlebar, but also provides a guarantee for high-intensity riding.

[0052] During the design process, the wall thickness between the handle portion 11 and the cross arm portion 12 can be spun according to actual needs to achieve a design of multiple diameters. Since the handle portion 11 and the cross arm portion 12 bear pressure evenly during use, excessive wall thickness is not required, which can effectively reduce the overall weight of the handlebar while maintaining its structural strength. This method makes the manufacture of the entire handlebar more efficient and meets the modern lightweight requirements.

[0053] After the spinning process is completed, the pipe bending operation is performed next to complete the shape of the handle portion 11. During the pipe bending process, a certain angle is formed between the cross arm portion 12 and the axle connecting portion 13. This design is not only beautiful, but also can effectively improve the wind-breaking performance of the handlebar, reduce wind resistance during riding, and improve riding comfort and efficiency.

[0054] This innovative processing technology not only reduces the difficulty of manufacturing complex handlebars, but also improves production efficiency. This spinning process optimized for handlebar design significantly improves the functionality, reliability and economy of the product, allowing manufacturers to respond to market demands more flexibly and promote the continuous progress and innovation of cycling equipment.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bicycle handlebar, characterized in that: The invention comprises a handlebar body (10), wherein both ends of the handlebar body (10) are formed with a handle portion (11) bent downward, an axle connection portion (13) is formed in the middle of the handlebar body (10), a cross arm portion (12) is formed between the handle portion (11) and the axle connection portion (13), and the axis angle between the cross arm portion (12) and the axle connection portion (13) is 2° to 6°, forming a protruding structure; the handle portion (11), the cross arm portion (12) and the axle connection portion (13) are gradually transitioned from a pipe fitting to form an integrated structure; the handlebar body (10) is a variable diameter pipe fitting formed by spinning a light alloy pipe fitting; and the cross section of the handlebar body (10) has at least two diameters.

2. A bicycle handlebar according to claim 1, characterized in that: The handlebar body (10) forms boss structures at different diameter positions.

3. A bicycle handlebar according to claim 2, characterized in that: The transition between the cross arm portion (12) and the axle connecting portion (13) is a conical structure.

4. A bicycle handlebar according to claim 2, characterized in that: The wall thickness of the cross arm portion (12) is at least half of the wall thickness of the axle connecting portion (13).

5. A bicycle handlebar according to claim 2, characterized in that: The surfaces of the handle portion (11) and the cross arm portion (12) are rolled with patterns.

6. A method for manufacturing a bicycle handlebar, applied to a bicycle handlebar as claimed in any one of claims 1 to 5, characterized in that: The steps include: S1. Cut the pipe blank according to the designed length; S2. The pipe fitting is mounted on the spinning equipment, and a variable diameter pipe fitting, i.e., a handlebar blank, is obtained after spinning according to the cross-sectional diameter parameters and wall thickness parameters of the handlebar; S3. Bending the pipe, bending both ends of the handlebar blank to form the handle portion (11), and then bending the transition between the cross arm portion (12) and the axle connecting portion (13) to form a wind-breaking structure; S4. Measure the size parameters of finished products and eliminate defective products; S5. Surface treatment; S6. Assemble other parts on the handlebar; S7. Overall packaging.

7. The method for manufacturing a bicycle handlebar according to claim 6, characterized in that: S2 includes the following steps, specifically: After the pipe fitting is clamped, the middle part of the pipe fitting is first spun, and the axle connection part (13) is processed according to the designed diameter and wall thickness. The axle connection part (13) is spun toward both ends of the pipe fitting to form a tapered structural transition between the cross arm part (12) and the axle connection part (13); and the handle part (11) and the cross arm part (12) are spun according to the designed diameter and wall thickness.

8. The method for manufacturing a bicycle handlebar according to claim 6, characterized in that: The wind-breaking structure in S3 is a forward-convex structure composed of a cross arm portion (12) and an axle connection portion (13), and the angle between the axes of the cross arm portion (12) and the axle connection portion (13) is 2° to 6°.

9. The method for manufacturing a bicycle handlebar according to claim 6, characterized in that: S5 includes the following steps, specifically: S5.1 Use knurling to roll out patterns on the surfaces of the handlebar grip portion (11) and the cross arm portion (12); S5.2 uses electroplating to create a rust-proof layer on the entire handlebar; S5.3 Surface painting.

10. The method for manufacturing a bicycle handlebar according to claim 6, characterized in that: S6 includes: The handlebar is put on the handle portion (11), and the connecting structure is installed on the axle connecting portion (13).

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