Locking device of bicycle saddle and bicycle thereof

Abstract

The invention discloses a bicycle which comprises a frame and a saddle. A vertical pipe is arranged on the frame, a core pipe is arranged below the saddle, a locking device is arranged between the core pipe and the vertical pipe and comprises multiple limiting steel balls annularly distributed on the vertical pipe and capable of transversely moving in a limited-amplitude manner, the limiting steelballs can be constantly held in the vertical pipe, and annular grooves in longitudinal arrangement and an inner taper sleeve sleeving outside the vertical pipe, capable of moving up and down and provided with an oblique pushing face are arranged on the outer wall of the core pipe. When the oblique pushing face on the inner taper sleeve inwards pushes and presses the limiting steel balls to enterone annular groove of the core pipe, height of the saddle is fixed; when the oblique pushing face of the inner taper sleeve leaves the limiting steel balls, the limiting steel balls move out of the annular groove of the core pipe, and the core pipe of the saddle and the vertical pipe on the frame can move up and down relatively. Relative position of the core pipe and the vertical pipe are limitedby utilizing the limiting steel balls in annular distribution, so that the locking device is higher in bearing capacity, and the saddle is less prone to deviation and more stable.

Description

technical field [0001] The invention relates to a mechanical locking device, in particular to a locking device of a bicycle saddle and a bicycle thereof. Background technique [0002] In order to facilitate the use of different groups of people, the height of the bicycle seat can be adjusted by itself and locked at a suitable position. The bicycle seat and the vehicle frame are usually fixed by bolts, and when the height of the bicycle seat needs to be adjusted, the bolts need to be loosened by tools such as a wrench. With this locking structure, it takes time and effort to adjust the height of the seat, and repeated adjustments are likely to reduce the service life of the bolts. The authorized announcement number is "CN203172816U", and the utility model patent named "bicycle lifting device" discloses a bicycle seat lifting device, including a lifting rod and a fixing sleeve. The bottom of the lifting rod is provided with a telescopic spring and inserted into the fixing sle...

AI Technical Summary

Problems solved by technology

[0003] The bicycle lifting device with the above structure has the following problems: only a single positioning steel ball is used to fix the relative position of the lifting rod and the fixing sleeve, and the bearing force of a single positioning steel ball may not be enough. At a certain point or on one side, when the weight of the human body is applied, the positioning steel ball on one side will easily make the position of the lifting rod and the fixing sleeve deviate

Cause uneven force, accelerate the wear of steel balls, and reduce the service life of steel balls

At the same time, the positioning sleeve is located on one side of the fixed sleeve, and it is not convenient to manually adjust the lifting of the seat

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