CN2694054Y - Bicycle chain - Google Patents

Abstract

The utility model provides a bicycle chain which is formed by the connection of a plurality of pin rolls, inner nodal plates and outer nodal plates. The utility model is characterized in that the spaces of the chain is 6. 5-10mm. Because the spaces of the chain are reduced, the tooth number of the fluted discs with same pitch diameters can be increased to match the bicycles with small wheel diameters, such as, collapsible bicycles, performing bicycles, electric bicycles or baby carriers. Flywheels with small spaces and round diameters are needed on the bicycles with small wheel diameters, and the tooth number of the flywheels with minor diameters is increased, which is favorable for improving the uniformity of transmission and reducing the stress concentration.

Description

A kind of bicycle chain

Technical field

The utility model relates to drive chain.

Background technique

The bicycle, particularly folding bicycle in popular in recent years steamboat footpath, performance bicycle, the wheel diameter of part electric motor car and perambulator is all very little.Little then vehicle frame of wheel and various parts all preferably should corresponding reducing.But because traditional standard is all adopted in the pitch countries in the world of blockchain bar---pitch is half inch.For keeping comfortable riding speed, must guarantee rational stroke (being that crank rotates the distance that the moving bicycle of an astragal is travelled).If the pitch diameter of fluted disc is for mating corresponding reducing with trolley frame.Then for guaranteeing stroke (being that crank rotates the distance that the moving bicycle of an astragal is travelled), flywheel also must reduce.To match with rear axle in the middle of the flywheel, so the pitch diameter minimum of flywheel is designed to about 22mm only. the pitch because of chain is half inch again, can only be designed to six teeth on the flywheel of 22mm pitch diameter.So bring many drawbacks; Because of the number of teeth very little, can make when riding foot-operated has dynamic vibratory sensation or discontinuous sense, i.e. transmission is inhomogeneous, obviously influence ride comfortable; In addition, the number of teeth makes transmission stress concentrate on the less surface very little, and the wearing and tearing of chain and flywheel aggravation had both caused the reduction of transmission efficiency, influenced working life again.

Summary of the invention

The purpose of the utility model is to provide a kind of more uniform bicycle chain of transmission that makes.Can arrange on the flywheel of identical pitch diameter that promptly the more number of teeth is to improve the uniformity of transmission.

Bicycle chain described in the utility model connects a plurality of interior nodal plates by a plurality of bearing pins and forms with outer nodal plate, and the pitch of two adjacent bearing pins is 6.5-10mm.

Pitch is that 6.5-8mm is preferable.

Bicycle chain described in the utility model is owing to the pitch that has reduced the standard bicycle chain has been brought many beneficial effects.Under the identical condition of the pitch diameter of flywheel (or fluted disc), can increase the number of teeth, thereby improve the uniformity of transmission, improve transmission efficiency.And reduce the stress concentration phenomenon, reduce wearing and tearing and improve working life.In addition, because the number of teeth can be increased, make it to be specially adapted to the bicycle or the perambulator in steamboat footpath on flywheel.For example, use the chain of traditional pitch, flywheel may be designed to 22mm by minimum, can only arrange six teeth, but adopts described chain, and the flywheel of identical pitch diameter can be arranged nine, and the number of teeth has improved 50% more than the tooth, and the comfortable feel of riding is obviously improved.In addition, at present a lot of bicycle external gear-shafts are that its flywheel is arranged side by side with one heart by the different fluted disc of multi-disc diameter.Stir chain conversion and each fluted disc engagement speed change by dialling connected device.Because the pitch of conventional chains is bigger, so not only flywheel is the multi-disc fluted disc, foot-operated fluted disc in front is also wanted two, three fluted discs, to obtain required the highest and minimum stroke, two covers are dialled the chain device and should be stirred flywheel place chain before and after so needing, and also will stir the chain at wheel disc place.Troublesome poeration and cost height.And front and back all change the engagement of chain and fluted disc, and some " speed ratio " overlaps.And adopt chain described in the utility model, and because of pitch is little, make the number of teeth of flywheel many, minimum pitch diameter can reach about 22mm, thereby need not pedal wheel disk is designed to the multi-disc fluted disc.A slice gets final product, flywheel place a plurality of fluted discs arranged side by side only, and easy and simple to handle, cost is low, and the speed ratio that changes does not overlap.

Description of drawings

Fig. 1 is the plan view of described chain.

Embodiment

A plurality of bearing pins 3 connect a plurality of interior nodal plates 1 and outer contact pin 2 constitutes chains.The pitch A value of adjacent bearing pin 3 is 6.5-10mm.Present embodiment A=6.5mm.It is all preferable that pitch A is chosen as 6.5-8mm.

Certainly also can select the parameter between the A=6.5-10mm.

Claims (2)

1. a bicycle chain connects a plurality of interior nodal plates (1) and outer nodal plate (2) formation by a plurality of bearing pins (3), and the pitch that it is characterized in that adjacent bearing pin (3) is 6.5-10mm.

2. bicycle chain according to claim 1 is characterized in that pitch is 6.5-8mm.

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