Five-way pipe device of bicycle and method for manufacturing same

Abstract

The invention discloses five-way pipe device and the manufacturing method thereof. The five-way pipe device comprises a frame body and a group of five-way pipe set. The frame body comprises a bearing seat section which can define a through hole and an embedded section which has complex digital on both sides of the though hole. The five-way pipe set comprises a first and a second combined pipes opposite to each other, which are respectively provided with a first pipe body and a second pipe body going through the two lateral sides of the through hole of the frame body; a first convex and a second convex which extend outward from the lateral periphery of the first pipe and the second pipe; and at least a first pin section and a second pin section, which are formed between the first and the second pipes and the first and the second convexes, and are correspondingly embed the embedded sections. The first and the second pin sections respectively embed into the embedded sections of the frame body so as to form a baffle to enhance the bonding strength and further prolong the service life.

Description

technical field [0001] The invention relates to a bottom bracket and its manufacturing method, in particular to a bicycle bottom bracket device and its manufacturing method. Background technique [0002] Such as figure 1 , 2 As shown, the current bicycle frame 1 has a frame body 11 made of composite material, and a bottom bracket 12 glued to the bottom of the frame body 11 . The five-way pipe 12 is in the shape of a straight ring, which can be passed through by a pedal turning handle (not shown) to support and rotate. When manufacturing the bicycle frame 1 , the bottom bracket tube 12 is placed in a forming mold first, and then the composite material is coated on the bottom bracket tube 12 to form the shape of the frame body 11 . The bottom bracket 12 is fixed in the frame body 11 through adhesive. [0003] However, since the pedal handles all turn in the same direction, the bottom bracket 12 will always bear the same direction and intermittent turning load (Turning load...

AI Technical Summary

Problems solved by technology

Although the surface area glued to the frame body can be increased through the two convex rings 22, the surfaces of the circular tube body 21 and the convex ring 22 are smooth and smooth without any blocking effect. It is easy to happen that the bottom bracket 2 breaks away from the frame body and rotates accordingly

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