CN2176964Y

CN2176964Y - Fast driving device for bicycle

Info

Publication number: CN2176964Y
Application number: CN 93206599
Authority: CN
Inventors: 余能华
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-14
Filing date: 1993-03-14
Publication date: 1994-09-14
Anticipated expiration: 2003-03-14

Abstract

The utility model relates to a fast driving device for a bicycle. On the basis of the existing bicycle, a flywheel is moved on a right crank of a center shaft from a rear shaft after the flywheel is reformed. The corresponding position of a right disk chuck of the rear shaft is provided with a small gear ring. The flywheel of the center shaft is installed on the right crank of the center shaft by a screw thread. The gear ring of the rear shaft is installed on the right disk chuck of the rear shaft. The flywheel of the center shaft and the gear ring of the rear shaft are engaged through a chain. The bicycle of the utility model has a quick speed. Bicycles which are matched with the utility model have multiple types and multiple functions have the advantages of simple structure and convenient maintenance, and the bicyclesc can be used as traffic tools and can be also used for body-building and games.

Description

Fast driving device for bicycle

The utility model belongs to bicycle accessories.

Bicycle is a kind of vehicle easily, its type of drive is by the press down with the foot pedal at axis place of people, the sprocket wheel that is fixed on the right crank of axis rotates thereupon, and by chain drive rear flywheel and trailing wheel rotation, its drive mechanism is simple, owing to can produce unidirectional relatively rotating between rear flywheel overcoat and the fuse, so that people get on the bus, get off, ride is all very convenient.But because the tooth number Z of the axis sprocket wheel in the conventional transmission device _GreatlyOuter number of teeth Z with the rear flywheel overcoat _LittleRatio Z _Greatly/ Z _Little(being designated hereinafter simply as ratio of number of teeth) is very little, and will increase also and be restricted, so standard bicycle speed is slow, kind is few.(this specification sheets will have bicycle now and be called standard bicycle, and the driving device between its axis and the rear axle is called conventional transmission device.Noun in this specification sheets, predicate and screw thread represent that Qi Yezhang work " structure of bicycle and maintenance " book of publishing with reference to the Guangxi People's Press, book number are five jiaos of 15113.63 prices one minute, one or nine May in the Seventh Five-Year Plan year the first edition.Following screw thread represents that in " M35 * 1 ", " M " represents screw thread, " 35 " expression diameter of thread, and " 1 " expression pitch, unit is a millimeter).

The purpose of this utility model provides a kind of bicycle power drive, and it both can replace conventional transmission device, has solved standard bicycle again and can not fully reduce the number of teeth because complex inner structure is arranged rear flywheel to increase the difficulty of road speed.During with identical frequency tap pedal, the speed that is equipped with the utility model bicycle is more a lot of soon than the standard bicycle of same diameter trailing wheel, and the speed that is equipped with small-wheel bicycle of the present utility model can be identical with the big standard bicycle of trailing wheel, even can be hurry up.Utilize the utility model that bicycle speed is accelerated; It is little to produce volume, polytype bicycle of light weight.

The purpose of this utility model be achieved in that on the basis of conventional transmission device with the flywheel transformation after by the back shaft position move on to the axis place, in the relevant position of the right floral disc of back axle body the rear axle gear circle of making (speed change, then mounting teeth wheel rim group if desired) is installed and is replaced original flywheel.The fuse of improved flywheel is installed on the right crank of axis by screw thread, and other parts of axis flywheel are the same with traditional flywheel, replace traditional sprocket wheel but the outer number of teeth of the overcoat of flywheel increases to the number of teeth of standard bicycle axis sprocket wheel.(flywheel that this specification sheets will move on on the right crank of axis after will transforming is called the axis flywheel), the right crank major part of axis of the present utility model sponson has screw thread M35 * 1 so that the axis flywheel is installed than the overstriking of traditional relevant position on the outer ring.Because the rear axle place has saved the complicated like that structure of flywheel, make the radius of the miniature gears circle at rear axle place can be seldom, that is the number of teeth of rear axle miniature gears seldom (can have only 8 teeth) the most after a little while.So ratio of number of teeth K of the present utility model can be very big, thereby it is fast much to be equipped with the speed of the utility model bicycle traditional vehicle more identical than trailing wheel external diameter during with identical frequency tap pedal.

The utility model is compared its ratio of number of teeth K with conventional transmission device can be very big, therefore the utility model is assemblied in tradition " two. six " on the type car, can make speed of a motor vehicle express train; If the utility model is assemblied on the bicycle of special minor diameter trailing wheel, can make the volume spy of car little, quality is special light, and folding and unfolding is very convenient, that its effect can replace is existing " two. six " the type bicycle is as the vehicle, and the degree of safety of driving can greatly improve.It is simple to be equipped with bicycle structure of the present utility model, easy to maintenance, both can be used as the vehicle and fitness tool, can be used for training cycles and match again.

The explanation of Figure of description drawing:

Fig. 1 is the structural plan figure of the quick driving device of bicycle.

Fig. 2 is the exploded drawings of axis flywheel of the present utility model.

Among the figure: 1, the right crank 2 of axis, axis flywheel 3, chain

4, rear axle gear circle 5, flat shelves 6, fuse

7, very heavy spring 8, very heavy 9, steel ball

10, overcoat 11, steel ball 12, flywheel pad

13, the silk retaining

In Fig. 1, axis flywheel (2) is installed on the right crank of axis (1) by screw thread, chain (3) is with the external tooth engagement of the external tooth and the rear axle gear circle (4) of the overcoat of axis flywheel (2), the profile of rear axle gear circle (4) is similar to the overcoat of traditional flywheel, but inner ring does not have internal tooth and alley, inner ring has the negative thread of M35 * 1, is installed on the right floral disc of rear axle by screw thread.

Flat retaining (5) riveted is at the right-hand member of fuse (6) in Fig. 2, and fuse (6) is gone up symmetry and had two groove mouths, and very heavy spring (7) and very heavy (8) just are installed in the groove, and the inner ring of fuse (6) has negative thread M35 * 1.The left end of fuse (6) has outside thread 35 * 1, the inner ring of the overcoat (10) of axis flywheel (2) is identical with traditional flywheel, one ball circling lane is respectively arranged about inner ring, steel ball (9) is in the alley on right side, flat retaining (5) is exactly the steel retaining on right side, steel ball (11) is in the alley in left side, silk retaining (13) is exactly the steel retaining in left side, the inner ring of silk retaining (13) has the negative thread of left-handed M35 * 1, be installed in the left end of fuse (6), the direction of arrow on the silk retaining (13) is represented the direction that it is backed off from fuse (6) exactly, in order to regulate the gap of antifriction-bearing box, between fuse (6) and silk retaining (13) flywheel pad (12) is housed, overcoat (10) makes between overcoat (10) and the fuse (6) and can produce unidirectional relatively rotating by very heavy (8) on internal tooth and the fuse (6) engagement.The external tooth of the ratio of number of teeth tradition flywheel of the outer toothed portion of overcoat (10) increases, to replace traditional axis sprocket wheel and chain engages.

Claims

1, the quick driving device of a kind of bicycle, between the middle shaft gear and rear axle gear of bicycle, come transferring power by chain, there is one to be flywheel in two gears, can produce unidirectional relatively rotating between the overcoat of flywheel and the fuse, it is characterized in that: the axis flywheel is installed on the right crank of axis by screw thread, by screw thread the rear axle gear circle is installed on the right floral disc of rear axle, passes through chain engages between axis flywheel and rear axle gear circle.

2, the quick driving device of bicycle according to claim 1 is characterized in that: the position turning of the right crank fixed chain wheels of axis has the outside thread of M35 * 1, so that the axis flywheel is installed.

3, the quick driving device of bicycle according to claim 1 is characterized in that: the right floral disc of rear axle is installed the rear axle gear circle by screw thread, and rear axle gear circle inwall has the negative thread of M35 * 1.