CN2087604U

CN2087604U - Automatic governor for bicycle

Info

Publication number: CN2087604U
Application number: CN 91210229
Authority: CN
Inventors: 杨宝琳
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-02-28
Filing date: 1991-02-28
Publication date: 1991-10-30

Abstract

The utility model relates to an automatic speed regulation device for bicycle. The automatic speed regulation device is different from the manual operation speed regulation mode used for the bicycle and the automatic speed regulation device makes use of the pedal force to automatically regulate the speed. The automatic speed regulation device is composed of a driving wheel disc, a driven wheel disc, a direction controlled gear, a gear rack, an extension spring, a chain and a sprocket. The working principle is that the pedal force is equal with drawing force of three springs when the bicycle is normally driven. When the automatic speed regulation device is provided with certain load, the function of the spring makes the driving wheel and the driven wheel create relative rotation and makes the automatic speed regulation device radially move in the slot hole of the direction controlled gear. The drive radius is changed to change the speed. The advantage of the automatic speed regulation device is that it can directly regulate the speed of the automatic speed regulation bicycle according to the pedal force without changing the speed with hand.

Description

Automatic governor for bicycle

The utility model relates to a kind of mechanical stepless speed-changing device.

Derailleur in the past is with manually controlling, it is to add a variable shaft on the rear axle of bicycle, each grade speed change all is with manual, and general variable shaft has only three-step gear shift, speed range is less, simultaneously, this transmission system is a hand gear in the process of moving, and is also comparatively inconvenient.

The purpose of this utility model provides a kind of said structure that is different from, and a kind of foot-propelled mechanical stepless speed-changing device is installed on the axis of bicycle.

Technical solution of the present utility model following (seeing Fig. 1 .2).It is by active wheel disc 8, and driven wheel disc 9 is controlled to gear 4, controls to tooth bar 5 support roller 10, extension spring 12, chain 1, sprocket wheel 2, wheel dish washer 7 compositions such as grade.Package unit is installed on the axis of bicycle.Wherein two at active wheel disc 8 respectively have a driven wheel disc 9, in a side of active wheel disc 8 and driven wheel disc 9, four sprocket wheels 2 and two support rollers 10 are installed, also be equipped with simultaneously four controls to gear 4 and four controls to tooth bar 5, and be meshed.Control is passed slotted eye 20 and the slotted eye 18 on the wheel disc 8 initiatively on the driven wheel disc 9 simultaneously to the little axle of gear 4, and moves at elongated slot 20 cathetuss, but makes wheel disc radius of gyration size variation.Be furnished with three extension springs 12 on week in the outer garden of active wheel disc 8, an end of spring 12 is fixed on the active wheel disc 8, and the other end is fixed on the wheel dish washer 7, and driven wheel disc 9 is fixed together with wheel dish washer 7.Two driven wheel discs 9 are linked together by a wheel dish washer 7 and a pipe 16, and initiatively wheel disc 8 is coaxial with driven wheel disc 9 simultaneously, and can do and relatively rotate.Pedal rod 14 and active wheel disc 8 rigid attachment.Chain 1 is meshed with sprocket wheel 2, and sprocket wheel 2 is coaxial to gear 5 with control.

The utility model also has following characteristics:

1, be evenly equipped with six slotted eyes 18 on active wheel disc 8, the line of centres of its each slotted eye 18 is an Achimedean spiral, also is furnished with four simultaneously and sees Fig. 3 with the concentric slotted eye 19(of main rotary table 8).

2, uniform six the radiant rays slotted eye 20(of warp-wise see Fig. 4 on driven wheel disc 9).

3, the change in radius on the wheel disc 8 initiatively is equivalent to change between 40～60 gardens week tooth, is 18 teeth as the number of teeth of rear flywheel, and then number of teeth ratio changes between 2.222～3.333.

Principle of work of the present utility model is: bicycle is when cruising, and foot-operated strength just in time is equal to or less than the total pulling force of three extension springs, and capable bicycle is exercised by normal speed.When bicycle running travels at uphill road or under heavy load, foot-operated strength will be greater than the total pulling force of three springs, at this moment because the effect of spring, initiatively will produce relative rotation between wheel disc and the driven wheel disc, and the intersection point of helical slotted eye on the feasible initiatively wheel disc and the warp-wise slotted eye on the flower wheel moves to wheel disk center warp-wise, that is to say sprocket wheel is moved to wheel disk center warp-wise, until moving to till foot-operated strength spring tension equates.At this moment the reduced radius of wheel disc has changed and has driven the purpose that radius has reached speed change.When load alleviates,, make bicycle return to original motoring condition again because the effect of spring makes driving wheel and flower wheel produce relative rotation once more.In speed-change process, a tension wheel is installed on bicycle rear axle, be adjusted at the variation of chain length in the speed-change process.In whole speed-change process, all be in the process of the mutual balance of spring tension of riding strength and wheel disc, to finish.

Description of drawings:

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

Fig. 2 is the birds-eye view of Fig. 1;

Fig. 3 is the structural representation of active wheel disc 8;

Fig. 4 is the structural representation of driven wheel disc 9.

Chain 1, sprocket wheel 2, sprocket shaft 3, control is to gear 4, and control is to tooth bar 5, and screw 6 is taken turns dish washer 7, active wheel disc 8, driven wheel disc 9, support roller 10, clothes-hook 11, extension spring 12, pad 13, pedal rod 14, axis 15, a pipe 16, fixing screw 17, helical slotted eye 18, long slot bore 19, radially slotted eye 20.

Extremely long-pending effect of the present utility model is: have the not characteristics of kinetic energy loss, it is not to go speed change with hand, but utilize bicycle under steam the size variation of pedal power reach the self-shifting purpose, and be infinitely variable speeds. This covering device is mounted on the bicycle middle shaft, but does not change the structure of existing bicycle middle shaft, and need not be installed on the rear axle of bicycle. In addition, it not only can use at bicycle, can also be applicable in other mechanism.

Claims

1, a kind of mechanical stepless speed-changing device, include chain 1, sprocket wheel 2, sprocket shaft 3, control is to gear 4, control is to tooth bar 5, screw 6, wheel dish washer 7, active wheel disc 8, driven wheel disc 9, support roller 10, extension spring 12, clothes-hook 11, pad 13, pedal rod 14, axis 15, between manage 16, fixing screw 17 compositions such as grade is characterized in that package unit is mounted on the axis of bicycle, and a driven wheel disc 9 is respectively arranged in the both sides of active wheel disc 8, side at wheel disc is equipped with four sprocket wheels 2 and two support rollers 10, also be equipped with simultaneously four controls to gear 4 and four controls to tooth bar 5, and be meshing with each other, control is passed slotted eye 20 and the slotted eye 18 on the wheel disc 8 initiatively on the driven wheel disc 9 simultaneously to the little axle of gear 4, be furnished with three extension springs 12 on week in the outer garden of active wheel disc 8, one end of spring 12 is fixed on the active wheel disc 8, and the other end is fixed on the wheel dish washer 7, rises, two driven wheel discs 9 are linked together by a wheel dish washer 7 and a pipe 16, initiatively wheel disc 8 is coaxial with driven wheel disc 9, and the while can be done and being relatively rotated, and chain 1 is meshed with sprocket wheel 2.

2, continuously variable unit according to claim 1, it is characterized in that on active wheel disc 8, being evenly equipped with six archimedes spiral groove holes 18, also be furnished with four four hole slots 19 concentric with wheel disc initiatively 8 simultaneously, radial equipartition has six radiant rays slotted eyes 20 on driven wheel disc 9.