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High speed transmission roller chain wheel

A technology of high-speed transmission and roller chains, applied in the direction of belts/chains/gears, hoisting devices, components with teeth, etc., can solve problems such as ineffectiveness, achieve simple structure, stable transmission, and reduce meshing impact Effect

Inactive Publication Date: 2008-06-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] U.S. Patent No. 5,921,878A discloses a roller chain sprocket. The left tooth profile (i.e. working face tooth profile) and the right tooth profile (i.e. non-working face tooth profile) of the sprocket are relative to the root arc center and the chain The center line of the wheel is asymmetrical, its purpose and technical effect are mainly to reduce the impact during meshing, but it has little effect on reducing the polygonal effect and reducing lateral fluctuations

Method used

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  • High speed transmission roller chain wheel
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  • High speed transmission roller chain wheel

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Embodiment Construction

[0018] The structure and use of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] figure 1 It is a schematic diagram of a traditional roller chain transmission, which is used for air distribution transmission between the engine crankshaft and camshaft. When the traditional roller chain meshes with the sprocket, the rollers first directly contact the bottom of the sprocket, which will inevitably lead to sudden contact and impact. Such as figure 2 As shown, before hinge A engages, the speed at point M is the same as the previous hinge B speed V b same. Once the hinge A is in contact with the gear teeth, the velocity at point M on the sprocket instantly changes to V m . by speed V b becomes V m , resulting in an oblique impact between the hinge and the tooth surface, the impact velocity is V cm .

[0020] image 3 The tooth profile curve structure of the high-speed transmission roller chain spr...

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Abstract

The invention discloses a high-speed transmission roller chain wheel. Wherein, the teeth are not symmetry while the left and right teeth are not symmetry relative to the connecting line from the arc center of gear root and the center of chain wheel; the tooth of one working surface of single tooth is formed by three curves, while the tooth root is a arc, the guide section is a arc, the working section is involute, arc or secondary curve or a composite curve formed by several arcs and secondary curves; the tooth of working surface can be formed by two curves as tooth root and working section. With said inventive chain wheel, the roller of chain can have stable mesh, lower impact and noise, with simple structure to support high-speed motion.

Description

technical field [0001] The invention relates to a roller chain sprocket suitable for high-speed chain transmission and belongs to the technical field of sprockets. technical background [0002] The performance of a car mainly depends on the engine, and the quality of the engine depends on the quality of each key component. The timing (or gas distribution) mechanism is one of the key components inside the engine, and gasoline engines require high-speed timing mechanisms. The timing mechanism of automobile engine generally adopts toothed belt. Under high speed and heavy load, variable speed and variable load, the toothed belt has lower transmission power and service life. The toothed belt must be replaced every 100,000 kilometers of the car, or it must be replaced regularly, otherwise the engine will be seriously damaged if it breaks. Chain drives have obvious advantages over toothed belts in terms of life and load capacity. However, the speed of the driving sprocket of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/30
Inventor 王勇
Owner SHANDONG UNIV