CN2166076Y - Effort-saving apparatus for bicycle - Google Patents

Abstract

The utility model relates to a laborsaving device for bicycles, which comprises three pairs of acceleration sprocket transmission pairs, wherein, the transmission pair comprises sprocket shafts (1), (6) which are fixed to front and back oblique beams by bearings respectively, and both left and right ends of each sprocket shaft are provided with sprocket gears respectively. A drive sprocket is driven by a crank. The drive sprocket drives a minor sprocket (2) fixed to the sprocket shaft (1) by a drive chain (4). A major sprocket (3) which is coaxial with the minor sprocket drives a minor sprocket (7) fixed to the sprocket shaft (6) by a drive chain (5). The major sprocket (8) fixed to the sprocket shaft (6) drives a driven sprocket by a drive chain (9). The bicycle provided with the laborsaving device has the advantages of labor saving and high speed. A vehicle having more than three wheels, which is provided with the device, has a more outstanding effect while loading cargoes.

Description

Effort-saving apparatus for bicycle

The utility model relates to a kind of two work-saving device of taking turns above bicycle that are used for.

The present widely used bicycle of people, three-wheel vehicle all is by crank direct drive sprocket wheel, thereby drive flywheel by the chain on the sprocket wheel and drive the car walking, ride relatively effort like this, the gas of particularly more requiring great effort during the three-wheel vehicle cargo, in order to address this problem, people have done multiple effort, as Chinese patent " 91218470.1 " number patent disclosure one key name be called the patent application of " three-wheel vehicle work-saving device ".Be to adopt driven wheel and transmission gear engagement, transmission gear and flower wheel engagement, sprocket wheel is fixed on the driven gear, thereby the crank that driving is fixed on the transmission gear drives transmission gear drive flower wheel realization labour-saving purpose, though this device has certain labor-saving effect but speed is unhappy, and can only be installed on the three-wheel vehicle, then inapplicable for two wheel bicycles.

Task of the present utility model is: overcome the deficiencies in the prior art, design the rickshaw work-saving device that a kind of speed per hour is fast, the labor-saving effect is good.

Task of the present utility model realizes as follows: work-saving device comprises by bearing and is separately fixed at sprocket shaft on the forward and backward cant beam, sprocket wheel is equipped with at the two ends, the left and right sides of every sprocket shaft respectively, drive sprocket is driven by crank, drive sprocket drives the minor sprocket 2 that is fixed on the sprocket shaft 1 by messenger chain 4, the hinge wheel 3 coaxial with minor sprocket drives the minor sprocket 7 that is fixed on the sprocket shaft 6 by messenger chain 5, and the hinge wheel 8 that is fixed on the sprocket shaft 6 drives driven sprocket 10 by messenger chain 9.

Driving wheel of the present utility model is paid the drive flower wheel owing to drive three pairs of speedup transmissions by three transmission shafts, and is not only laborsaving but also speed per hour is fast.

Fig. 1 is first kind of embodiment view of the present utility model.

Fig. 2 is second kind of embodiment view of the present utility model.

Most preferred embodiment of the present utility model, as figure, this work-saving device is installed on two wheel bicycles, driving wheel (drive sprocket just) 11 driven by people's pedal by crank, bearing is equipped with at the place in the middle of the axle of sprocket shaft 1, bearing is equipped with bearing seat outward, bearing seat is fixed on the preceding cant beam, the bearing of sprocket shaft 1 is equipped with minor sprocket 2, the other end is equipped with hinge wheel 3, and bearing is equipped with at the place in the middle of the axle of sprocket shaft 6, and bearing outside has bearing seat, bearing seat is fixed on the cant beam of back, one end of sprocket shaft 6 is equipped with minor sprocket 7, and the other end is equipped with hinge wheel 8, and drive sprocket drives the minor sprocket 7 that is fixed on the sprocket shaft 6 by driving chain wheel 3 by messenger chain 5, thereby drive sprocket shaft 6, the hinge wheel 8 that is fixed on the sprocket shaft 6 drives driven sprocket 10 by messenger chain 9, thereby drives the runner coaxial with driven sprocket, wherein hinge wheel (3), (8), (10) with minor sprocket (2), (7), (10) diameter ratio is 36:20cm, can realize speedup like this, reach per hour 50～60 kilometers.

Another embodiment of the present utility model as Fig. 2, is contained in five with this effort-saving mechanism and takes turns on the car.

Claims (3)

1, a kind of work-saving device of bicycle, pay by three pairs of transmissions and to constitute, of the present utility model being characterised in that: these three pairs of transmissions are paid and are the speedup chain sprocket drive and pay, it comprise be separately fixed at by bearing before, sprocket shaft on the back cant beam (1), (6), sprocket wheel is equipped with at the two ends, the left and right sides of every sprocket shaft respectively, drive wheel drives drive sprocket by crank and drives the minor sprocket (2) that is fixed on the sprocket shaft (1) by messenger chain (4), the hinge wheel coaxial with minor sprocket (3) drives the minor sprocket 7 that is fixed on the sprocket shaft (6) by messenger chain 5, and the hinge wheel (8) that is fixed on the sprocket shaft (6) drives driven sprocket (10) by messenger chain (9).

2, work-saving device as claimed in claim 1 is characterized in that: said drive sprocket axle constitutes equicrural triangle with the sprocket shaft (1), (6) that are fixed on the forward and backward cant beam.

3, work-saving device as claimed in claim 1 or 2 is characterized in that, said hinge wheel (3), (8), (11) are 36:20 with the ratio of minor sprocket (2), straight position, (7) (10).

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