A torsion connection structure of the center shaft of a balance exercise bike

Abstract

The invention discloses a twisting and connecting structure for a center shaft of a balanced exercise bicycle, and belongs to the technical field of exercise bicycles. A left neck part and a left end component are arranged on a left pedal, wherein the left neck part, the left end component and the left pedal are integrally formed, 3-6 steel ball pits are uniformly distributed in the inner end surface of the left end component in equal radiuses, a steel ball is arranged in the corresponding steel ball pit, and the radian of the steel ball is the same as that of the steel ball pit; a right neck part, a right neck tube, a right end component and a right center shaft are arranged on a right pedal, wherein the right neck part, the right neck tube, the right end component, the center shaft and the right pedal are integrally formed, 3-6 rail grooves of which the radians are the same as those of the steel balls are uniformly distributed in the inner end surface of the right end component in equal radiuses, two hemisphere pits of which the radians are the same as those of the steel balls are formed in two ends of one rail groove respectively, and one steel ball is matched with the corresponding rail groove; the center shaft and a through hole in the middle of the left end component are in gap and rotation matching, a thread part is arranged at the left end of the center shaft, and a loosening resistant spacer is connected to the thread part in a sleeving manner and locked through a locking nut. The twisting and connecting structure for the center shaft of the balanced exercise bicycle is simple in structure, and low in cost, in the production technology is easy to control, the relative torsional amplitude is appropriate, the properties are reliable and to the structure is convenient to assemble and use.

Description

technical field [0001] The invention belongs to the technical field of exercise bikes, and in particular relates to a torsional connection structure of a center shaft of a balance exercise bike. Background technique [0002] Most of the two-wheeled electric balance cars and human fitness vitality boards currently on the market are torsion devices composed of a central shaft and two bearing sleeves. The numbers are 201420314351.5, electric balance torsion car, and 200920263852.4, directional return connection device for dynamic board. Their structure and production process are complicated, the torsional resistance is large, the cost is high, and the service life is low. Problems seriously affect the promotion and sales of products. Contents of the invention [0003] Aiming at the above-mentioned problems existing in the prior art, the object of the present invention is to design and provide a technical scheme of a torsional connection structure for the center shaft of a bal...

AI Technical Summary

Problems solved by technology

[0002] Most of the two-wheeled electric balance cars and human fitness vitality boards currently on the market are torsion devices composed of a central shaft and two bearing sleeves. The numbers are 201420314351.5, electric balance torsion car, 200920263852.4, directional return connection device of dynamic board, its structure and production process are complicated, the torsional resistance is large, the cost is high, the service life is low and other problems seriously affect the promotion and sales of products

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