Column folding mechanism for treadmills

Abstract

The invention provides a column folding mechanism for treadmills and belongs to the technical field of machinery, which solves the problem that the structural strength of the existing column folding mechanism is insufficient and affects the service life. The column folding mechanism for treadmills comprises a connecting sleeve I, a connecting sleeve II, a connecting sleeve III and a bolt assembly;the connecting sleeve II can rotate relative to the connecting sleeve I; a spring is arranged between the connecting sleeve III and the connecting sleeve II; a locking structure comprises multiple positioning bayonets which are arranged in an inner end surface, facing the connecting sleeve II, of the connecting sleeve I and positioning clamp blocks which are arranged in an end surface, facing theconnecting sleeve I, of the connecting sleeve II; the positioning clamp blocks are matched with the positioning bayonets; the outer wall of the connecting sleeve I is provided with a limiting clamp block I which projects outward and extends towards the connecting sleeve II; the outer wall of the connecting sleeve II is provided with a limiting clamp block II which projects outward and extends towards the connecting sleeve I; the limiting clamp block II is matched with the limiting clamp block I. It is easy to process, not easy to deform, and has high structural strength.

Description

technical field [0001] The invention belongs to the technical field of fitness equipment, and relates to a treadmill, in particular to a column folding mechanism for the treadmill. Background technique [0002] With the continuous improvement of people's living standards, people's demand for physical exercise is increasing. As a common and practical fitness equipment, treadmills are becoming more and more popular. Most existing treadmills are assembled and used. Folding structure for easy transportation, use and storage, such as the unfolding and retracting mechanism of a treadmill disclosed in the Chinese patent [Application Publication No. CN104759062A]. Between them, the running belt device is combined on the base frame; the unfolding mechanism includes a positioning plate fixed on the inner side of the lower part of the column, a support handle, a support plate fixed on the base frame and a locking device driven by the support handle ; The upright column and the base fr...

AI Technical Summary

Problems solved by technology

The above-mentioned unfolding and retracting mechanism has many parts, and the structure is complex, and it is inconvenient to adjust, and the firmness of the locking mechanism is low, which affects the safety of use.

The applicant had applied for a patent [Patent No. ZL2017215671883] in 2017. Although it can make the operation relatively simple and convenient, but because the limit card slot is set on the inner wall surface of the connecting sleeve, it is easy to make the wall thickness of the connecting sleeve Thin, relatively weak structural strength, affecting service life

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