Ram-type 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

Application Number
CN202610116326.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
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.

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Abstract

The invention discloses a stamping type shared electric bicycle frame and a production process thereof. The frame comprises a main body frame shell, a front fork assembly, a rear fork assembly and a connecting support which are formed through punching and welded. The main body frame shell is of a U-shaped double-shell butt joint structure, and crossed reinforcing ribs are arranged on the inner side of the main body frame shell. The front fork is of an overall structure with the thickness gradually changed, and the rear fork is of a symmetrical fork arm structure. And the connecting support is provided with a welding flange. All the components are connected through a resistance spot welding and carbon dioxide arc welding combined technology, and the surface of each component is provided with a phosphorization and powder coating composite protective layer. The production process comprises the steps of raw material pretreatment, multi-station punch forming, combined welding, surface protection treatment and final inspection assembly. By means of the optimized stamping structure design and manufacturing process, high strength, light weight, excellent corrosion resistance and high size precision of the frame are achieved, the frame is particularly suitable for high-frequency and high-load use working conditions of shared electric bicycles, and the requirements for efficient and low-cost batch production are met.
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