Height adjustment mechanism of bicycle seat tube

Abstract

The invention provides a bicycle seat tube height adjusting mechanism. Mainly, oil way switches of the bicycle seat tube height adjusting mechanism are all located in a lifting adjusting unit, and valve ports of the oil way switches and an oil baffle are jointed in a vertical attachment mode for blockage. Thus, during maintenance, it is only needed to pull and replace the lifting adjusting unit, and the effects of being convenient to maintain and assemble are achieved. The valve ports and the oil baffle are in surface attachment in the vertical setting relationship, the oil baffle effect is good, at the moment a user sits on a seat cushion, the oil baffle does not bear shear force, and therefore the service life is prolonged.

Description

【Technical field】 [0001] The invention relates to a bicycle seat tube height adjustment mechanism, especially the bicycle seat tube height adjustment mechanism which has the advantages of convenient assembly and maintenance, simplified components and easy processing, and novel structure. 【Background technique】 [0002] The known bicycle seat tube height adjustment mechanism is mostly composed of an inner tube, an outer tube, a lifting adjustment unit and a lifting control unit. Wherein, one end of the inner tube and the outer tube are inserted into each other. The lifting adjustment unit is located in the inner and outer tubes, one end is fixedly connected to the outer tube, and the other end is fixed to the inner tube to drive the inner tube to rise or fall. The lift control unit is operated by a user to control the action or stop of the lift adjustment unit. Such as China Taiwan patent application case number: 104205140, 099137166 etc. (hereinafter referred to as the kno...

AI Technical Summary

Problems solved by technology

[0003] 1. Inconvenient assembly and maintenance of components

Because the oil circuit exchange of the lifting adjustment unit is applied to the internal space of the inner and outer tubes, when the components fail to be replaced, the entire internal components of the support tube need to be disassembled, which makes maintenance inconvenient and relatively inconvenient in assembly

[0004] 2. The oil circuit ring for oil retaining is easy to break or wear

However, when adjusting the lowering height of the seat cushion, when a person sits on the seat cushion, there will be a huge momentary downward pressure on the seat tube. The oil ring bears the shear stress of the downward pressure, which is easy to cause fracture; The long-term shear stress friction between the inner walls of the pipe can easily cause the thickness to become thinner and cause oil leakage failure

[0005] 3. The oil circuit of the conventional case is applied to the internal space of the inner and outer pipes, so the striker for pushing the oil circuit valve needs to be lengthened, which results in high cost of the striker, and the conventional case has many parts, and the accumulated standard error of each part is large , so that the precision of each part is required to be high, which leads to high processing costs of parts

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