A fixed connection device for a folding bicycle standpipe and a joint

Abstract

A device for fixedly connecting a riser and a connector of a folding bike comprises a front fork riser, a lower connector sleeved at the front end of the front fork riser, and a compression bolt for connecting the lower connector and the front fork riser, wherein the lower connector is a complete continuous annular component; the inner hole of the lower connector is a conical hole with a small upper part and a big lower part; a conical collet of which the wall body is provided with at least two deformation slots is matched with the conical hole; a sliding nut on the excircle of which an upper protruding ring and a lower protruding ring are arranged is in threaded connection with the compression bolt; the sliding nut is hooked with the inner hole of the conical collet through the lower protruding ring thereof; a limiting slot for preventing the sliding nut from rotating relative to the conical collet is further formed in the excircle of the sliding nut. Through elastic deformation of the conical collet between the front fork riser and the inner circle of the lower connector, the front fork riser is firmly connected with the lower connector, thus greatly improving the connection reliability between the lower connector and the front fork riser.

Description

Technical field [0001] The invention relates to a mechanical fixing connection mechanism, in particular to a fixing connection device for a vertical pipe and a joint of a folding bicycle handlebar. Background technique [0002] Folding bicycles are popular among consumers for their quick folding or unfolding characteristics. When the bicycle is folded, the volume becomes smaller, which greatly facilitates transportation and storage; after unfolding, it can be used safely, which is convenient for people to exercise or travel. The vertical tube of the handlebar and the vertical tube of the front fork are installed at the front end of the bicycle frame, and the vertical tube of the handle is usually connected to the vertical tube of the front fork through a folding joint. The folding joint is composed of an upper and a lower joint with one end hinged together. The upper joint is fixedly connected with the lower end of the vertical pipe of the handlebar, such as figure 1 As shown, ...

AI Technical Summary

Problems solved by technology

At this time, the inner circle of the deformed lower joint is no longer a standard circle, so its contact with the outer circle of the front fork stem is not a full-circle surface contact, but a partial contact, so that the friction between the two Greatly reduced, which affects the reliability of the connection between the lower joint and the front fork stem

In addition, after the inner circle of the lower joint is deformed, when using the locking mechanism to lock the upper and lower joints, because the arc of the locking block matching the inner circle of the lower joint cannot be deformed synchronously, the locking may fail, making The upper and lower joints are disengaged, which brings safety hazards to people riding bicycles

Adjustment screw holes are set on the side of the lower joint, which affects the strength of the component and is not beautiful; it is also inconvenient to assemble and disassemble

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