Integral bike metal seat tube and molding method thereof

Abstract

The invention discloses an integral type bicycle metal seat tube which comprises a vertical tube body and a horizontal installing part. The integral type bicycle metal seat tube is characterized in that the vertical tube body and the horizontal installing part are integrally molded by jointless metal tube fittings, and a cavity is formed in the horizontal installing part. In the integral type bicycle metal seat tube, the cavity is left in the horizontal installing part which is directly molded and processed by the jointless metal tube fittings rather than a solid to reduce the weight of a finished product, and meanwhile, the thickness and the length of the tube fittings can be preset. When the integral type bicycle metal seat tube is processed, alloy tube fitting sectional materials with proper thickness and length can be selected. The integral type bicycle metal seat tube has high processing precision and attractive appearance, is not easy to waste materials and can reduce the production cost. The invention also provides a molding method of the integral type bicycle metal seat tube.

Description

technical field [0001] The invention relates to a bicycle component, in particular to a bicycle metal seat tube, and also relates to a forming method of the bicycle metal seat tube. Background technique [0002] The bicycle metal seat tube in the prior art is generally made up of a vertical pipe body and a horizontal installation part, and the vertical pipe body and the horizontal installation part are welded and formed. Since such a bicycle seat tube is formed by welding, the welded part is easy to be desoldered or broken during riding, and there is a potential safety hazard. For this reason, once occurred on the market one-piece bicycle seat tube (as figure 1 Shown in A) and the molding method of this one-piece bicycle seat tube (as figure 1 Shown in B), this one-piece bicycle seat tube is molded by solid bar or solid profile, pumped tube forming, overcomes the shortcomings such as the easy fracture of the welded bicycle seat tube. However, since it is molded from a sol...

AI Technical Summary

Problems solved by technology

Since such a bicycle seat tube is formed by welding, the welded part is easy to be desoldered or broken during riding, and there is a potential safety hazard.

For this reason, once occurred on the market one-piece bicycle seat tube (as figure 1 Shown in A) and the molding method of this one-piece bicycle seat tube (as figure 1 As shown in B), this one-piece bicycle seat tube is molded from a solid bar or a solid profile, and drawn into a tube, which overcomes the shortcomings of the welded bicycle seat tube, which is easy to break.

However, since it is molded from a solid rod or profile, its horizontal mounting part is solid, which easily increases the weight of the bicycle body, the product precision is low, the long bottom is not easy to control, and it is easy to cause waste of materials

In the case of increasingly scarce resources, high raw material prices, and bad economic environment in the world, it shows a great limit

In addition, there is a technical prejudice that bicycle metal seatposts can only be processed from solid bars or solid profiles

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