Bottom bracket cup and bicycle pedal crank component

Abstract

The invention discloses a bottom bracket cup and a bicycle pedal crank component. The bicycle pedal crank component comprises a conjoined crank, a toothed disc and a hollow bottom bracket. The conjoined crank comprises a lower section, a mandrel and an upper section in sequential connection, the lower section and the mandrel are formed integrally, and two ends of the mandrel are provided with external threads. Each external thread is in threaded connection with a bottom bracket cup, and a fixing stop pin is arranged between the upper section and the toothed disc; preferably, a retaining part of the bottom bracket cup close to the lower section is a first retaining part, and a retaining part of the bottom bracket cup close to the upper section is a second retaining part. Bearings and the retaining parts can fit closely to enable close fit of wall surfaces, less proneness to gap generation is realized, an excellent orientation is obtained after assembly, and problems of shaking, deviation and the like of components are avoided. By an integrally formed structure of the lower section and the mandrel of the conjoined crank and a detachable connection structure of the upper section and the mandrel, convenience in assembly and high assembly efficiency are realized.

Description

technical field [0001] The invention relates to a five-way headset and a bicycle pedal crank assembly. Background technique [0002] The bottom of the bicycle frame is usually provided with a bottom bracket, and two bottom bracket headsets are respectively assembled on the inner sides of the two bottom bracket tubes, and a mandrel is used to pass through the two bottom bracket headsets. The arbor is combined with the crank of the pedals, and a pair of bottom bracket headsets provide the rotational action of the arbor. [0003] The structure of the existing design of the ball bowl set is as follows: figure 1 As shown, it includes a ball bowl seat 1, a ball bearing 2 arranged inside the ball bowl seat 1, a sealing ring 3 which is covered on the ball bearing 2 and is elastic rubber, and a seal ring 3 which penetrates the sealing ring. The retaining member 4 of the ring 3, however, the design of directly passing the ball bearing 2 for the mandrel has the following disadvantage...

AI Technical Summary

Problems solved by technology

[0007] In view of the above problems, the present invention provides a bottom bracket headset and a bicycle pedal crank assembly, which are easy to assemble, and the walls of each component are more tightly abutted, and no gaps are likely to occur. Combined, it has better positioning after assembly, avoiding problems such as shaking and offset of components

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