Stamping shared electric bicycle frame and production process thereof

By using a U-shaped double-shell structure formed by stamping cold-rolled steel plates and an optimized welding process, the problems of high material cost and insufficient structural optimization of traditional frames have been solved, resulting in a shared electric bicycle frame with high strength, lightweight and corrosion resistance, suitable for the high-frequency riding conditions of shared bicycles.

CN122126378APending Publication Date: 2026-06-02SHANGHAI PHOENIX BICYCLE JIANGSU CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI PHOENIX BICYCLE JIANGSU CO LTD
Filing Date
2026-01-28
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Traditional bicycle frames are expensive to manufacture and have complex production processes, making it difficult to meet the high-frequency, high-intensity use and weather resistance requirements of shared bicycles in harsh outdoor environments, and there is limited room for structural optimization.

Method used

The U-shaped double-shell structure, formed by stamping cold-rolled steel plate, combined with longitudinal and transverse reinforcing ribs and optimized welding process, forms a high-strength and lightweight frame. It is protected by a composite phosphate layer and powder coating, making it suitable for the high-frequency riding conditions of shared bicycles.

Benefits of technology

It achieves a combination of high strength, lightweight and excellent corrosion resistance, improves the service life of the frame and the assembly precision of the whole vehicle, is suitable for efficient mass production, and reduces the cost per unit.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a stamped shared electric bicycle frame and its manufacturing process. The frame includes a main frame shell formed by stamping and welding, front and rear fork assemblies, and connecting supports. The main frame shell is a U-shaped double-shell spliced ​​structure with cross reinforcing ribs on the inner side; the front fork is a gradually thickened integral structure, and the rear fork is a symmetrical fork arm structure; the connecting supports have welded flanges. All components are connected using a combination of resistance spot welding and CO2 gas shielded welding, and the surfaces have a composite protective layer of phosphating and powder coating. The manufacturing process includes raw material pretreatment, multi-station stamping, assembly welding, surface protection treatment, and final inspection and assembly. This invention, through optimized stamping structure design and manufacturing process, achieves high strength, lightweight, excellent corrosion resistance, and high dimensional accuracy in the frame, making it particularly suitable for the high-frequency, high-load use conditions of shared electric bicycles and meeting the needs of efficient, low-cost mass production.
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