CN2225423Y

CN2225423Y - Inflection shaft gear speed changing mechanism for bicycle wheel core

Info

Publication number: CN2225423Y
Application number: CN 94237098
Authority: CN
Inventors: 周君毅
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-04-13
Filing date: 1994-04-13
Publication date: 1996-04-24
Anticipated expiration: 2004-04-13

Abstract

The utility model relates to an inflection shaft gear speed changing mechanism for a bicycle wheel core. The driving core of a traditional wheel core inflection shaft bicycle is additionally provided with a set of gear speed changing mechanism to increase and regulate a transmission ratio, which forms a novel wheel core inflection shaft bicycle. The utility model can be driven by a front wheel or a rear wheel. The utility model can be made into a two-person bicycle or a multi-person bicycle. The bicycle of new series has the advantages of novel design, practicality and compact structure and has the advantages that many chain type bicycles don't have.

Description

The bicycle core wheel turns the shaft gear speed-changing mechanism

The utility model relates to a kind of bicycle driving mechanism, is mainly used in single and gear change driver train tandem bicycle.

The cycle wheel in market mostly is the chain wheel drive mode now.This chain wheel drive mode exists structure huge, be difficult for weak points such as maintaining, speed changeization be low, up-to-date Chinese patent (9323424.5) does not propose a kind of concrete enforcement structure, therefore necessary to likening further discussion and research to as yet though proposed a kind of a kind of technical conceive and principle of gear change transmission.

The purpose of this utility model provides a kind of speed-change gear of bicycle, thereby makes the gear change transmission really to be used on bicycle, has characteristics simple in structure, that speed change is convenient.

The utility model is realized the gear change transmission by a kind of like this technical scheme.On the bicycle driving main shaft, by gear of key connected set, this gear is transferred to kink another driven wheel on main shaft by a pair of gear change that pay on the axle main shaft below again, and this gear is by an axle sleeve and fastening the connecting together of bicycle driving wheel.Like this, when pin is pedaled the commentaries on classics square shaft by turning axle, just can use gear to drive bicycle quick by this gear mechanism.

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

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

From accompanying drawing as can be seen, the utility model has a main shaft 10, and a part is turned for connecting in the two ends of main shaft 10.When the person of taking advantage of was pedaled pedal with the pin forward direction, moment of torsion reached main shaft 10 by turning axle, and main shaft 10 just drives a fastening with it continuous gear 4 and rotates.Because gear 4 is meshed with gear 24, so gear 24 rotates with gear 4.The axle 20 of gear 24 is to depart from the axle of paying of main shaft 10 certain distances.The outer ring gear of gear 28 for just taking turns, it links to each other with gear 24 with sleeve 32 by ratchet device 30, and gear 28 is nibbled mutually with gear 51.When gear 4 forward direction were rotated, gear 28 rotated together in company with gear 24, and gear 5 rotates with gear 28 again.Gear 5 rotates by the housing 27 that sleeve-type bearing bowl 48 and screw 39 drive speed-changing mechanism.Because the outer rim of housing 27 has steel wire to link to each other with steel circle on the wheel, advances thereby can finish drive wheels.

One ratchet device 30 is arranged between gear 28 and sleeve 32, and its inner structure is identical with the flywheel of chain-type bicycle, just the sprocket of outer ring is changed into the involute tooth gear of gear mesh, but still plays the function of Regular Bicycle flywheel.

Paying axle 20 is the axle of gear 24 and gear 28.It is suspended on the below of main shaft 10 by the eccentric block of the outer ring ring 38 of the eccentric block of sleeve-type bearing bowl 9 and bearing 49, and paying axle 20 be the stepped shaft that two is little, the centre is thick, and the two ends microcephaly is packed in respectively in hole 21 and the hole 36.Because sleeve-type bearing bowl 9 is fixed with vehicle frame strut bar 6, do not rotate, therefore to pay axle 20 and also do not rotate, it and main shaft 10 keeping parallelisms are apart from constant.

The outer rim of the housings support lid 3 of speed-changing mechanism links to each other with housing 27 with screw 1, nut 2, and inner ring links to each other with right gland 18 with a left side, the outer ring gland 17 of bearing 7 with screw 16, can one surpass around main shaft 18 with housing 27 and rotate.Loosen nut 2 can be separated housing 27 (and wheel) with screw 39 with this speed-change gear 5.Install and remove very convenient.

Vehicle frame left side strut bar 6 usefulness are closed cap 8 and are fixed on the sleeve-type bearing bowl 9, and right strut bar 46 usefulness of vehicle frame are closed cap 45 and are fixed on the sleeve-type bearing bowl 44, and main shaft 10 can freely rotate with respect to vehicle frame.

Two ends, the left and right sides at main shaft 10 have a shallow slot, and pad 12 and pad 43 respectively have an internal tooth, embed in the shallow slot, can prevent to close cap 11 respectively and close cap 42 loosening.Lock screw 47 can prevent that ball back-up ring about 40 strings are moving.

This kind bicycle transmission system both can be used for single bicycle, also can be used for double or many person bicycles, and each rotating mechanism can be separate, used more suitable rider like this, had very high practical value.

Claims

1, the bicycle core wheel turns the shaft gear speed-changing mechanism, comprise a ratchet device 30 and a main shaft 10, it is characterized in that being fixed with a gear 4 by key on the main shaft 10, gear 4 is meshed with gear 24, the axle 20 of gear 24 is to depart from the axle of paying of main shaft 10 certain distances, gear 28 is the outer ring gear of flywheel, and links to each other with gear 24 with sleeve 32 by ratchet device 38, and gear 28 is nibbled mutually with gear 51.

2, the speed-changing mechanism that advances as claim 1, it is characterized in that paying eccentric block and the eccentric block of bearing 49 outer rings ring 38 below that be suspended on main shaft 10 of axle 20 by sleeve-type bearing bowl 9, paying axle 20 is packed in hole 21 and the hole 36 for the thick stepped shaft two ends microcephaly in little centre, two, with main shaft 10 keeping parallelisms, distance is constant.

3, speed-changing mechanism as claimed in claim 1, the outer rim that it is characterized in that housings support lid 3 links to each other with housing 27 with screw 1, nut 2, inner ring links to each other with right gland 18 with a left side, the outer ring gland 27 of bearing 7 with screw 16, and vehicle frame left side strut bar 6 usefulness are closed cap 8 and are fixed on the sleeve-type bearing bowl 9, and right strut bar 46 usefulness of vehicle frame are closed cap 45 and are fixed on the sleeve-type bearing bowl 44.

4, speed-changing mechanism as claimed in claim 1, the two ends, the left and right sides that it is characterized in that main shaft 10 respectively have a shallow slot, and pad 12 and pad 43 respectively have an internal tooth, embed in the shallow slot, can prevent to close cap 11 respectively and close cap 42 loosening, lock screw 47 is used to prevent that ball back-up ring about 40 strings are moving.