CN2181460Y

CN2181460Y - Rear wheel core gear transmission type bicycle for two people

Info

Publication number: CN2181460Y
Application number: CN 93234024
Authority: CN
Inventors: 周君毅
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-27
Filing date: 1993-05-27
Publication date: 1994-11-02
Anticipated expiration: 2003-05-27

Abstract

The utility model relates to a rear wheel core gear transmission type bicycle for two people, which is an improved type bicycle. The bicycle is provided with two kinds of driving force, a first is that a rider sitting on a front seat pedals a crank shaft of a centre shaft by two feet to drive a big chain wheel to rotate, and a back wheel is driven to rotate by a chain and a minor sprocket; a second is that the rider sitting on a back seat pedals the crank shaft which is arranged in the center of the back wheel, and the back wheel is driven to rotate by a gear change transmission system. Because a set of ratchet arrangement is arranged inside each of the minor sprocket and the gear transmission system, the drive can be carried out simultaneously and can also be carried out respectively and independently without interfering one another. The bicycle is provided with the basic structure of common single bicycles, and the lightness and recreational performance of riding by two people are also added.

Description

Rear wheel core gear transmission type bicycle for two people

The utility model belongs to a kind of manpower transportation, is a kind of modified version of ordinary bicycle.

Only suitable single the driving of institute's general-duty bicycle is with man-hour at present, is sitting on the shelf by the band person, and not only uncomfortable but also do not make power, like this, the speed of a motor vehicle is slower, the person's of riding fatiguability.

The purpose of this utility model is to provide a kind of convenience by bike double, laborsaving, comfortable by bike tandem bicycle.

The technology implementation scheme of taking according to purpose of the present invention is: adopt the combination flooding flowing mode to provide power by the driving of crutches axle for bicycle, in the basic structure that keeps ordinary bicycle, when promptly driving the driving system of minor sprocket (being flywheel) driving trailing wheel rotation by chain by the axis hinge wheel, increase by one at the trailing wheel center and turn axle, by the gear change driving system, also can with preceding turn axle and drive trailing wheel simultaneously and rotate, two kinds of drivings can be carried out simultaneously, also can independently carry out separately, each other independent driving system.

The utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the utility model transmission principle scheme drawing.

Can find out that from accompanying drawing the utility model primary member comprises: front-wheel (1), handle (2), axis (the preceding axle that turns) (3), hinge wheel (4), vehicle frame (5), chain (6), front chair (7), shelf (8), trailing wheel (10), back seat (11), minor sprocket (12), gear change driving system (13).

It is characterized by this car is love seat, and the crutches axle drives.After increasing by one in the heart, rear wheel rotation turns axle (9), with the gear change driving system (13) that turns the axle drive by this, this driving system can drive this bicycle simultaneously with the chain wheel drive system that preceding turns axle 3, also can distinguish individual drive bicycle, independent driving system each other.

In the gear change driving system of this car, the transmission of trailing wheel core wheel is a dead axle two stage speed change train, after turn that a driving gear (15) is fastening to link to each other, driving gear (15) again with fixing tie-rod (18) on gear (20) nibble mutually, since gear (20) with and gear (19) be structure as a whole, when gear (26) rotates, gear (25) rotates simultaneously, and gear (25) is nibbled mutually with gear (20), gear (20) is connected as a single entity with shell (18) again, so driven gear (16) rotates when the meshing relation gear, further drives shell (14) again and rotates, and by steel wire drive trailing wheel, thereby reach the purpose that drives bicycle.For the heel that guarantees fore rider person with after the person's of riding the unlikely interference of tiptoe, 100～200mm can extend at the rear portion of cycle frame.The back seat of bicycle is installed in the rear of shelf, can makes this bicycle keep band goods function when bicycle is single to drive.The cross bar reduction of cycle frame highly promptly is designed to brace, helps fore rider person and step on car.

Its transmission principle is seen Fig. 2.

Fore rider person turns axle (3) before stepping with both feet, drive hinge wheel (4) and rotate, and drives minor sprocket (flywheel) (12) by chain (6) and rotates.Because minor sprocket links to each other with the shell (14) of gear change driving system, the shell of gear change driving system (14) links to each other with steel rim of rear wheel by steel wire again, and the rotation of minor sprocket can drive trailing wheel and rotate.

Rider on the back seat, turn axle (9) after stepping with both feet, the driving gear (15) that drives the two stage speed change fixed shaft gear train rotates, because gear meshing, drive two gears on the tie-rod (18), gear (20) and gear (19) rotate, driven gear (16) rotates again, because gear (16) is affixed with the shell (14) of gear change driving system, gear change driving system shell (14), be connected with steel rim of rear wheel by steel wire again, therefore, the rotation of gear (16) will drive trailing wheel and rotate.

The ratchet device that unidirectional transmission is arranged in minor sprocket (flywheel) (12) inside has the ratchet device (19) of unidirectional transmission in gear (19) inside, therefore, two kinds of type of drive both can be carried out simultaneously, also can independently carry out separately, and not interfere with each other.

Claims

1, trailing wheel core wheel gear transmission tandem bicycle, comprise front-wheel (1), trailing wheel (10) vehicle frame (5), front chair (7), back seat (11), precedingly turn axle (3), it is characterized in that: the trailing wheel core wheel increase turn after one axle (9) and by after turn the gear change driving system (13) that axle (9) drives, and gear change passes system (13) can drive bicycle simultaneously with the chain wheel drive system that preceding turns axle (3), but also individual drive bicycle, independent driving system each other.

2, bicycle as claimed in claim 1, it is characterized in that trailing wheel core wheel gear transmission is a dead axle two stage speed change wheel system, after turn the axle (9) and fastening linking to each other of driving gear (19), driving gear (19) is nibbled mutually with the fixing gear (26) of tie-rod (24) again, gear (26) is structure as a whole with gear (25), gear (25) is nibbled again mutually with gear (20), and gear (20) is connected as a single entity with shell (18) again simultaneously.

3,, it is characterized in that having in the gear (25) ratchet device of a unidirectional transmission as claim 1 and 2 described bicycles.