CN2717809Y - Pedal driving device for bicycle - Google Patents

Abstract

The utility model relates to a pedal driving device for bicycle. The pedal driving device mainly solves the exiting problems of long backlash of the power mechanism of the bicycle, low inefficiency for applying work and exerted treading the bicycle. The utility model is characterized in; the two ends of middle axle (1) are fixed to the inner sleeve of ratchet (4); the outer sleeve of the ratchet (4) is fixed to the crank arm (6) with foot pedal; the bicycle frame (2) upper front the middle axle (1) is fixed with a tripod (8) with pulley (7) on the angle; the two crank arms (6) are connected by rope (9) which winds through pulley (7). The pedal driving device for bicycle is characterized in short backlash, high efficiency for applying work and saving labors for treading, etc. The utility model can be used for two-wheeled, three-wheeled or four-wheel manpower pedal bicycles.

Description

The bicycle pedals actuating device

Technical field:

The utility model relates to the power drive of bicycle, especially the bicycle pedals actuating device.

Background technology:

Bicycle as a kind of manpower transportation in China's widespread use, be subjected to most working clans or student's favor, the actuating unit of standard bicycle by axis, be fixed on chain drum on the axis, crank, chain and rear flywheel that the band that links to each other with axis is pedaled son form, people are by bike the time, two pin are stepped on to the front lower place and are pedaled the period of the day from 11 p.m. to 1 a.m and just do work, and all the other are idle travel, and idle travel is longer than working stroke, mechanical efficiency is low, people's treadmill effort.

The utility model content:

Existing bicycle actuating unit idle travel is long in order to overcome, mechanical efficiency is low and the deficiency of people's treadmill effort, the utility model provides a kind of bicycle pedals actuating device, this bicycle pedals actuating device has that idle travel is short, mechanical efficiency is high and people's treadmill labour-saving characteristics, can be used for two-wheeled, three-wheel or four-wheel manpower bicycle.

The technical solution of the utility model is: this bicycle pedals actuating device comprises axis and vehicle frame, is fixed with on the axis with rear flywheel to pass through chain bonded assembly chain drum, and the axis two ends are all fixed with the interior cover of ratchet, and the overcoat clamping band of ratchet is pedaled the crank of son; Be fixed with the spider of band pulley on the angle on the vehicle frame of axis front upper place, link to each other by the rope that twined pulley between two cranks.

The utlity model has following beneficial effect: owing to take such scheme, people are by bike the time, left foot is pedaled on the left of the front lower place depresses and is walked to bottom dead point after son reaches effective working stroke, step on the son of pedaling that the right side lifts this moment again, pedal when the right side and walk to bottom dead point, left side after son reaches effective working stroke and pedal son and lift, so form a reciprocation cycle, just step on downwards this process people and to pedal son, idle travel is short, mechanical efficiency is high, and people's treadmill is laborsaving, has improved moving velocity.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is scheme of installations of the present utility model.

1-axis among the figure, the 2-vehicle frame, the 3-chain drum, the 4-ratchet, 5-is pedaled son, 6-crank, 7-pulley, 8-spider, 9-rope.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

As Fig. 1 in conjunction with shown in Figure 2, this bicycle pedals actuating device comprises axis 1 and vehicle frame 2, is fixed with on the axis 1 with rear flywheel to pass through chain bonded assembly chain drum 3, and axis 1 two ends are all fixed with the interior cover of ratchet 4, the overcoat clamping band of ratchet 4 is pedaled the crank 6 of son 5, and ratchet 4 can replace with bicycle freewheel; Be fixed with on the vehicle frame 2 of axis 1 front upper place on the angle between spider 8, two cranks 6 of band pulley 7 and link to each other by the rope 9 that twined pulley 7, bottom dead center position is gone up in the length control of scalable rope 9, and then the foot-operated acting of control effective travel.

People are by bike the time, left foot is pedaled on the left of the front lower place depresses and is walked to bottom dead point after son reaches effective working stroke, step on the son of pedaling that reaches top dead point that lift on the right side this moment again, pedal when the right side and to walk to bottom dead point, left side after son reaches effective working stroke and pedal son and lift, so form a reciprocation cycle, just step on downwards this process people and to pedal son, idle travel is short, mechanical efficiency is high, and people's treadmill is laborsaving; Because this device is pedaled son by both sides and is pumped and realize to drive, and therefore can shorten axis and ground distance, reduces resistance, improves moving velocity.Main this device can be used for two-wheeled, three-wheel or four-wheel manpower bicycle.

Claims (1)

1, a kind of bicycle pedals actuating device, comprise axis (1) and vehicle frame (2), be fixed with on the axis (1) with rear flywheel and pass through chain bonded assembly chain drum (3), it is characterized in that: axis (1) two ends are all fixed with the interior cover of ratchet (4), and the overcoat clamping band of ratchet (4) is pedaled the crank (6) of son (5); Be fixed with on the angle spider (8) on the vehicle frame (2) of axis (1) front upper place, link to each other by the rope (9) that twined pulley (7) between two cranks (6) with pulley (7).

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