Bicycle

Abstract

The invention discloses a bicycle. The bicycle comprises a bicycle frame, a front wheel, a rear wheel and a chain wheel, and further comprises a rotary shaft, a clutch structure and two connecting rods, wherein a round hole is formed in the center of the chain wheel; the rotary shaft penetrates through the round hole; the two ends of the rotary shaft are connected with the head ends of the two connecting rods correspondingly; the tail end of each connecting rod is provided with a pedal; the straight line tangential to both the bottom of the front wheel and the bottom of the rear wheel is called as a horizon line, and the straight line passing through the center of the chain wheel and also vertically intersecting with the horizon line is called as a plumb line; the clutch structure is arranged between the rotary shaft and the chain wheel; the rotary shaft can drive the chain wheel when the clutch structure is in the engaged position, but not when the clutch structure is in the disengaged position; and the clutch structure is switched to be at the disengaged position when the pedals are close to the plumb line, and is switched to the engaged position when the pedals are away from the plumb line. The bicycle has the following advantages of exerting force easily and being convenient to ride.

Description

technical field [0001] The invention relates to the field of bicycle manufacturing Background technique [0002] Bicycle can be seen everywhere as a kind of walking-replacing tool, and bicycle generally comprises vehicle frame, front wheel, trailing wheel, chainring, but the bicycle of prior art has a common shortcoming: riding is laborious, not very convenient, as figure 1 As shown, when the two pedals T of the bicycle are distributed forward and backward, it is easy for the rider to exert force on the pedals, as long as he pushes the pedals T with his feet, and the movements are very natural and coordinated, as shown in figure 2 As shown, when the two pedals T of the bicycle are distributed upwards and downwards, it is difficult for the rider to exert force on the pedals T, and the rider must make the following actions: the left foot pushes one pedal T forward , the sole of the right foot pushes the other pedal T backward, the sole of the left foot forms an acute angle w...

AI Technical Summary

Problems solved by technology

When the bicycle of the present invention is in use, the pedals can quickly transition from a state where it is difficult to exert force to a state where it is easy to exert force. When the pedals are close to the plumb line, that is to say, when the pedals are generally distributed upwards, When the clutch structure is switched to the off position, the rotating shaft cannot drive the crankshaft, and the rotating shaft is idling without bearing the load. The pedal quickly leaves the plumb line and transitions to a state where it is easy to exert force. The disc rotates, so it can be seen that when the rotating bearing is loaded, the pedal has left the plumb line, which overcomes the shortcoming of bicycle riding.

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