Sprocket
I transmit an axial turn to a roller chain, and a sprocket (British: sprocket) is a gear to communicate centering on the turn of the roller chain. I am called the chain wheel. I am used for the feed parts of the film of drive transmission, a photograph and the movies such as a motorcycle, a bicycle, the endless track with imminent quality widely.
Table of contents
Summary
As a machine factor for the general-purpose transmission, I am standardized in ISO 606, the Japanese Industrial Standards in the international standard by JIS B 1802 [1]. To avoid the mechanical interference with other parts and roller chains or say the salient where I appeared axially of the leading bearing with a boss (British: boss) for the fitting with the axis, and there are the kinds such as type A (flat board type without the boss), type B (single boss type), the C type (both bosses type) by the presence of the boss. The number of the teeth is written as "T", and a tooth is 30 if it is "30T". [2]
The next ceremony is managed when I assume chain pace P [2].
- Sprocket outer diameter: Do=P(0.6+cot(180/T) °)
- A pitch line diameter: Dp=P/(sin(180/T) °)
Abrasion is easy to deviate so that the ratio with the number of the tops and the number of of the roller chain at least one sprocket tooth is simple, but 場合程 of the gear slowdown is not made much of [the source required].
for the bicycle
The crank pedal side is called "a chain ring" and is usually bigger than the rear wheel side. As for the thing equipped with an outside gearbox, it is in the sprocket plural structure that I set it, and a chain is changed optionally different in the size to both only rear wheel side or crank side and sides of the rear wheel. Particularly, I am called "a cassette sprocket" because the putting on and taking off to a hub is enabled in the state that a lot of things to become than five steps put together as for the shifting-type sprocket of the rear wheel.
By mountain bikes of the truck racer of the fixation gear used for bicycle races and the single speed, I change an anteroposterior sprocket, and the adjustment of the gear ratio is performed in acceleration serious consideration or highest speed serious consideration.
for the motorcycle
I call the rear wheel side "rear sprocket" or "a driven sprocket", and the rear wheel side has a bigger gear with the bicycle "a drive sprocket" on the engine side adversely. Even the sprocket for the motorcycle changes the second slowdown ratio by an anteroposterior combination and changes the accelerating forces at growth and the low speed range of the highest speed and may customize it in the characteristic that I put together in a use.
Footnote
- ^ Kiyoshi Onishi (1955). A machine design drafting manual based on JIS. It is p. science and technology studies company 11-37. ISBN 4-8445-2021-0.
- ^ a b Daido Kogyo Co., Ltd. "Chain sprocket dendou09.pdf for the transmission". Daido Kogyo Co., Ltd. July 24, 2011 reading.
Allied item
This article is taken from the Japanese Wikipedia Sprocket
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