CN101574995A

CN101574995A - Transmission device of bicycle or tricycle

Info

Publication number: CN101574995A
Application number: CNA200810047678XA
Authority: CN
Inventors: 邹秀华
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-07
Filing date: 2008-05-07
Publication date: 2009-11-11

Abstract

The invention relates to a transmission device of a bicycle or a tricycle, which comprises a shaft I and a shaft II arranged on a frame. A drive sprocket is fixedly arranged on the shaft I, and a driven sprocket and an output sprocket are fixedly arranged on the shaft II. The transmission device is characterized in that at least a pair of double-layer sprockets is arranged on the shaft I; double-layer sprockets with the same number of the sprockets on the shaft I are arranged on the shaft II; the double-layer sprockets both form transmission connection with the shaft I or the shaft II; and the drive sprocket forms transmission connection with a small sprocket of the first pair of the double-layer sprockets on the shaft II through a chain, a big sprocket of the first pair of the double-layer sprockets on the shaft II forms a transmission connection with the small sprocket of the first pair of the double-layer sprockets on the shaft I through the chain, the connection is realized by parity of reasoning, and a last stage big sprocket on the shaft I forms transmission connection with the driven sprocket on the shaft II through the chain at last. The invention solves the problems of complex structure, loose combination, larger volume, difficult manufacture, higher cost and insufficient beauty and practicality of the existing acceleration transmission devices, and is especially suitable for acceleration transmission of the bicycles and tricycles.

Description

The driving device of bicycle or three-wheel vehicle

(1) technical field:

The present invention relates to mechanical drive, especially for the driving device of bicycle or three-wheel vehicle.

(2) background technology:

Bicycle and three-wheel vehicle are important riding instead of walk and transportation means in the daily life, the driving system of ordinary bicycle and three-wheel vehicle mainly is made of front and back sprocket wheel and chain, belong to the one-level chain sprocket drive, generally speaking, the transmitting ratio of recently representing driving system with the number of teeth of the number of teeth of driven sprocket and drive sprocket, if increase the diameter and the number of teeth of preceding sprocket wheel or reduce the afterwards diameter and the number of teeth of sprocket wheel, just can reduce transmitting ratio, the speed of bicycle is improved, but, before the increase of sprocket diameter and the number of teeth limit is arranged, the reducing of the diameter of back sprocket wheel and the number of teeth has a limit equally.Therefore will improve the speed of bicycle, just can only be the progression that increases chain sprocket drive.Sprocket wheel multiplying gears such as secondary, three grades, level Four are arranged at present, its structure all is to want many transmission shafts of corresponding increase to wait as three, four, five to realize, its complex structure, arrange loose, volume is bigger, and is heavy coarse, laborsaving inadequately, attractive in appearance inadequately, bring great inconvenience for the manufacturing and marketing and user.

(3) summary of the invention:

Purpose of the present invention be exactly to solve existing multiplying gear complex structure, arrange loose, volume more greatly, problem attractive in appearance inadequately, compact conformation is provided, have multipole speedup, economical and practical bicycle or the driving device of three-wheel vehicle.

For realizing purpose of the present invention, following two kinds of invention schemes are proposed:

Scheme one: the driving device of a kind of bicycle or three-wheel vehicle, include the axle I and the axle II that are contained on the vehicle frame, drive sprocket fixedly is housed on axle I, driven sprocket and output chain gear fixedly are housed on axle II, it is characterized in that: at least one pair of double-deck sprocket wheel is housed on axle I, be equipped with on axle II and a double-deck sprocket wheel of I equal number, all double-deck sprocket wheels all are rotationally connected with an axle I or an axle II; Drive sprocket is by the minor sprocket driving coupling of first pair of double-deck sprocket wheel on chain and the axle II, the hinge wheel of first pair of double-deck sprocket wheel on the axle II is by the minor sprocket driving coupling of first pair of double-deck sprocket wheel on chain and the axle I, connect by that analogy, the final stage hinge wheel on the rear axle I is by the driven sprocket driving coupling on chain and the axle II.

Scheme two: the driving device of a kind of bicycle or three-wheel vehicle, include axle I, the axle II, the axle III that are contained on the vehicle frame, driving gear fixedly is housed on axle I, driven gear and output chain gear fixedly are housed on axle III, it is characterized in that: on axle I, n is housed and pays double-layer gear, on axle II n+1 is housed and pays double-layer gear, all double-layer gears are to be rotationally connected with axle I or axle II; Driving gear be with axle II on the pinion transmission of first pair of double-layer gear, the pinion transmission of first pair of double-layer gear on the big gear wheel of first pair of double-layer gear on the axle II and the axle I, the big gear wheel of the first pair double-layer gear of axle on the I again with axle II on the pinion transmission of second pair of double-layer gear, connect the driven gear driving coupling on the final stage big gear wheel on the rear axle II and the axle III by that analogy.

For reducing friction, between all double-deck sprocket wheels or double-layer gear and axle, needle bearing is installed described in the present invention program one or two.

For compact, attractive in appearance, two sprocket wheels of mutual transmission or the transmitting ratio of gear are 1: 2 described in the present invention program one or two.Can certainly be other ratio.

N described in the present invention program two is equal to or greater than 1 integer.

For compact, attractive in appearance, the axle I described in the present invention program two, axle II, axle III are triangularly arranged; Can certainly be that straight-though arrangement is arranged.

The present invention is simple and compact for structure, uses lightly laborsavingly, and speedup significantly improves, and has easily manufacturedly, saves steel, and with low cost, the advantage that is easy to popularize is the economical and practical desirable multiplying gear of a new generation.

(4) description of drawings:

Fig. 1 is the present invention program one a structural representation;

Fig. 2 is the present invention program two a structural front view;

Fig. 3 is the present invention program two a structure birds-eye view.

Among the figure: 1-output chain gear, 2-vehicle frame, 3, the double-deck sprocket wheel of 4-, 5-driven sprocket, 6-axle II, 7-axle I, 8, the double-deck sprocket wheel of 9-, 10-drive sprocket, 11-axle III, 12-driven gear, 13-axle II, 14-axle I, 15,16,17,18, the 19-double-layer gear, 20-driving gear, 21-needle bearing.

(5) specific embodiment:

Example 1: referring to Fig. 1, the present invention program one has vehicle frame 2, and an I 7 is housed on vehicle frame 2, and axle II 6 fixedly is equipped with drive sprocket 10 on axle I 7, driven sprocket 5 and output chain gear 1 fixedly are housed on axle II 6.Two double-deck sprocket wheels 8 and 9 particularly also are housed on axle I 7, and two double-deck sprocket wheels 3 and 4 are housed also on axle II 6, four double-deck sprocket wheels 3,4,8,9 are connected with axle I 7 or axle II 6 by four needle bearings 21 respectively, and promptly four double-deck sprocket wheels can rotate relative to axle.Adopt chain to connect respectively at last: the minor sprocket of drive sprocket 10 and double-deck sprocket wheel 3, the hinge wheel of double-deck sprocket wheel 3 and the miniature gears of double-deck sprocket wheel 9, the hinge wheel of double-deck sprocket wheel 9 and the miniature gears of double-deck sprocket wheel 4, the hinge wheel of double-deck sprocket wheel 4 and the miniature gears of double-deck sprocket wheel 8, the hinge wheel and the driven sprocket 5 of double-deck sprocket wheel 8 promptly constitute one of driving device of the present invention.Wherein the transmitting ratio of two sprocket wheels of transmission is 1: 2 mutually.Can certainly get other speedup gear ratio value.

Example 2: referring to Fig. 2, Fig. 3, the present invention program two, have vehicle frame 2 equally, and an I 14 is housed on vehicle frame 2, axle II 13, axle III11, three (see figure 2)s that are triangularly arranged.Driving gear 20 fixedly is housed on axle I 14, fixing dress driven gear 12 and output chain gear 1 on axle III, particularly: two double-layer gears 16,18 also are housed on axle I14, and three double-layer gears 15,17,19 also are housed on axle II 13.Five double-layer gears 16,18,15,17,19 are rotationally connected with axle I 14 or axle II 13 by five needle bearings 21 respectively.The wherein pinion transmission of driving gear 20 and double-layer gear 19, the pinion transmission of the big gear wheel of double-layer gear 19 and double-layer gear 18, the pinion transmission of the big gear wheel of double-layer gear 18 and double-layer gear 17, the pinion transmission of the big gear wheel of double-layer gear 17 and double-layer gear 16, the pinion transmission of the big gear wheel of double-layer gear 16 and double-layer gear 15, the big gear wheel of double-layer gear 15 and driven gear 12 engaged transmission, and the transmitting ratio of two gears of the above-mentioned transmission that is meshing with each other is designed to 1: 2, can certainly get other speedup gear ratio value, then constitute two of driving device of the present invention.

Certainly, the above embodiment is a preferred version of the present invention, but does not therefore limit protection scope of the present invention.Any variation scheme that all foundations structure of the present invention, structure, mode, method and principle are done all is covered by within protection scope of the present invention.

Claims

1. the driving device of bicycle or three-wheel vehicle, include the axle I and the axle II that are contained on the vehicle frame, drive sprocket fixedly is housed on axle I, driven sprocket and output chain gear fixedly are housed on axle II, it is characterized in that: at least one pair of double-deck sprocket wheel is housed on axle I, be equipped with on axle II and a double-deck sprocket wheel of I equal number, all double-deck sprocket wheels all are rotationally connected with an axle I or an axle II; Drive sprocket is by the minor sprocket driving coupling of first pair of double-deck sprocket wheel on chain and the axle II, the hinge wheel of first pair of double-deck sprocket wheel on the axle II is by the minor sprocket driving coupling of first pair of double-deck sprocket wheel on chain and the axle I, connect by that analogy, the final stage hinge wheel on the rear axle I is by the driven sprocket driving coupling on chain and the axle II.

2. the driving device of bicycle or three-wheel vehicle, include axle I, the axle II, the axle III that are contained on the vehicle frame, driving gear fixedly is housed on axle I, driven gear and output chain gear fixedly are housed on axle III, it is characterized in that: on axle I, n is housed and pays double-layer gear, on axle II n+1 is housed and pays double-layer gear, all double-layer gears are to be rotationally connected with axle I or axle II; Driving gear be with axle II on the pinion transmission of first pair of double-layer gear, the pinion transmission of first pair of double-layer gear on the big gear wheel of first pair of double-layer gear on the axle II and the axle I, the big gear wheel of the first pair double-layer gear of axle on the I again with axle II on the pinion transmission of second pair of double-layer gear, connect the driven gear driving coupling on the final stage big gear wheel on the rear axle II and the axle III by that analogy.

3. the driving device of a kind of bicycle according to claim 1 and 2 or three-wheel vehicle is characterized in that: between all double-deck sprocket wheels or double-layer gear and axle needle bearing is installed.

4. the driving device of a kind of bicycle according to claim 1 and 2 or three-wheel vehicle is characterized in that: two sprocket wheels of described mutual transmission or the transmitting ratio of gear are 1: 2.

5. the driving device of a kind of bicycle according to claim 2 or three-wheel vehicle is characterized in that: described n is equal to or greater than 1 integer.

6. the driving device of a kind of bicycle according to claim 2 or three-wheel vehicle is characterized in that: described axle I, axle II, axle III are triangularly arranged.