Toothed rack or cog
This article is about a gear or wheel with metallic teeth. For other uses, see Sprocket ( disambiguation ) Wikipedia 16 tooth sprocket. Do = Sprocket diameter. Dp = Pitch diameter A sprocket, [ 1 ] sprocket-wheel [ 2 ] or chainwheel is a profile wheel with teeth that mesh with a chain, track or other perforated or indented material. [ 3 ] [ 4 ] The diagnose ‘sprocket ‘ applies broadly to any wheel upon which radial projections engage a chain legislate over it. It is distinguished from a gear in that sprockets are never meshed together directly, and differs from a pulley in that sprockets have teeth and pulleys are fluent except for timing pulleys used with serrate belts.

Bạn đang đọc: Wikipedia

Sprockets are used in bicycles, motorcycles, tracked vehicles, and other machinery either to transmit traffic circle motion between two shafts where gears are unsuitable or to impart linear motion to a track, tape etc. possibly the most coarse phase of sprocket may be found in the bicycle, in which the pedal rotating shaft carries a large sprocket-wheel, which drives a range, which, in turn, drives a little sprocket on the axle of the back steering wheel. early automobiles were besides largely driven by sprocket and chain mechanism, a practice largely copied from bicycles. Sprockets are of versatile designs, a maximum of efficiency being claimed for each by its originator. Sprockets typically do not have a flange. Some sprockets used with time belts have flanges to keep the time swath centered. Sprockets and chains are besides used for exponent transmission from one shaft to another where slippage is not admissible, sprocket chains being used rather of belts or ropes and sprocket-wheels alternatively of pulleys. They can be run at high speed and some forms of range are so constructed as to be noiseless even at high rush .

etymology [edit ]

The term ‘sprocket ‘ in the first place applied to the projection from the steering wheel that caught on the range and provided the drive to it [ citation needed ]. The overall wheel was then termed a ‘sprocket roulette wheel ‘. With time and common use of these devices, the overall wheel became known as a sprocket. The earlier uses would immediately be seen as antediluvian .

transportation [edit ]

In the case of bicycle chains, it is potential to modify the overall gear proportion of the chain campaign by varying the diameter ( and therefore, the tooth count ) of the sprockets on each side of the chain. This is the basis of derailleur gears. A multi-speed bicycle, by providing two or three different-sized driving sprockets and up to 12 ( as of 2018 ) different-sized drive sprockets, allows up to 36 different gear ratios. The resulting lower gear ratios make the bicycle easier to pedal up hills while the higher gear ratios make the bicycle more potent to pedal on flats and downhills. In a like way, manually changing the sprockets on a motorcycle can change the characteristics of acceleration and top speed by modifying the final drive gear ratio. The final drive gear proportion can be calculated by dividing the numeral of teeth on the rear cog by the number of teeth on the counter-shaft sprocket. With respect to the sprout gearing on a motorcycle, installing a smaller counter-shaft cog ( fewer tooth ), or a larger rear sprocket ( more teeth ), produces a lower gear ratio, which increases the acceleration of the motorcycle but decreases its top speed. Installing a larger counter-shaft cog, or a smaller back sprocket, produces a higher gear ratio, which decreases the acceleration of the motorbike but increases its top focal ratio.

Chain tracked vehicles [edit ]

In the sheath of vehicles with caterpillar tracks the engine-driven toothed-wheel transmitting gesticulate to the tracks is known as the drive sprocket and may be positioned at the battlefront or back of the vehicle, or in some cases both. There may besides be a one-third sprocket, elevated, driving the traverse .

Film and newspaper [edit ]

Wikipedia Moving video mechanism from 1914. The cog wheels a, barn, and degree centigrade engage and transport the film. a and b move with undifferentiated speed and carbon indexes each frame of the movie into position for expulsion. Sprockets are used in the film enchant mechanisms of movie projectors and movie cameras. [ 5 ] In this case, the sprocket wheels engage film perforations in the film stock. Sprocket feed was besides used for punch tape and is used for newspaper feed to some computer printers.

See besides [edit ]

References [edit ]

generator :
Category : Car Brakes