CN2263624Y

CN2263624Y - Three-axle double-chain transmission of double bicycle

Info

Publication number: CN2263624Y
Application number: CN 95232260
Authority: CN
Inventors: 贾昌勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-19
Filing date: 1995-09-19
Publication date: 1997-10-01
Anticipated expiration: 2005-09-19

Abstract

The utility model relates to a three-axle double-chain transmission of a double bicycle, comprising a front shaft, a middle shaft, a back shaft, a chain wheel, a middle chain wheel and a small flywheel on the back shaft. The utility model is characterized in that the middle chain wheel of the utility model is provided with double wheel discs and is provided with two chains; a front chain is arranged on the front chain wheel and one wheel disc of the middle chain wheel; a back chain is arranged on the back flywheel and the other wheel disc of the middle chain wheel. The utility model has the advantages that the utility model is difficult to fall off, a tensioner can not need, people can take a rest when riding in a long distance, the utility model has labour saving, the difficulty of manufacture and installation can be reduced.

Description

Three double-stranded bar drivings device of tandem bicycle

The utility model belongs to the driving device of bicycle, and it is the improvement design to traditional double person bicycle driving device.

The raising of China's living standards of the people makes leisure, recreation become indispensable part in people's life gradually, the excellent tools of exercise health when tandem bicycle is family's outing holiday, spare time.But the driving device of traditional tandem bicycle is made up of three, strand bar, and its chain comes off easily at centre portion, and the effort of riding requires relatively strictness to bicycle processing and stack-mounted, can not adapt to the needs of penetration and promotion.

The purpose of this utility model provides three double-stranded bar drivings device of a kind of tandem bicycle, satisfies the requirement that people are laborsaving to riding, easy to assembly, do not fall chain.

The purpose of this utility model is achieved in that it comprises small flywheel on front axle, axis, rear axle and preceding sprocket wheel, middle sprocket and the rear axle, it is characterized in that: its middle sprocket has double-wheel-disc, and two chains are arranged, on the wheel disc of sprocket wheel and middle sprocket, rear chain was contained on another wheel disc of rear flywheel and middle sprocket before preceding chain was contained in.

Transmission system also is housed on rear flywheel.

Preceding sprocket wheel also can be a double-wheel-disc.

The utility model has the advantages that: owing to establish two chains, each root chain contraction in length, thus difficult drop-off, and need not add tightening device; Because two chains, front axle and axis can alternately be imput shaft, and long-distance riding can obtain rest, and two people also can exert oneself simultaneously, drive rear axle jointly, and be comparatively laborsaving; Owing to constituted two chain wheel set, needn't be strict with three axle center in-lines during installation, greatly reduce and make and mounting hardness.

Details of the present utility model is provided by following examples and accompanying drawing thereof;

Fig. 1 is a general illustration of the present utility model.

Fig. 2-the 3rd, diagram of gears of the present utility model.

According to Fig. 1-3, the utility model comprises front axle 1, is contained in the preceding sprocket wheel 2 on the front axle 1, it has a double-wheel-disc, a wheel disc with the middle sprocket 5 on the preceding chain 3 contact axis 4, another wheel disc on the middle sprocket 5 is equipped with conventional transmission system 9 with the rear flywheel 8 on the rear chain 6 contact rear axles 7 at flywheel 8 places.

The utility model is gone slick through test, and flexibly, steadily, laborsaving fast, double harmony is good, is the novel tandem bicycle that has than bright prospects.

Claims

1, three double-stranded bar drivings device of tandem bicycle, it comprises the small flywheel on front axle, axis, rear axle and preceding sprocket wheel, middle sprocket and the rear axle, it is characterized in that: its middle sprocket has double-wheel-disc, and two chains are arranged, on the wheel disc of sprocket wheel and middle sprocket, rear chain was contained on another wheel disc of rear flywheel and middle sprocket before preceding chain was contained in.

2, three double-stranded bar drivings device of tandem bicycle according to claim 1 is characterized in that; Transmission system also is housed on rear flywheel.

3, three double-stranded bar drivings device of tandem bicycle according to claim 1, it is characterized in that: preceding sprocket wheel also can be a double-wheel-disc.