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Disconnectable Pulley Device, Alternator Comprising Such A Device And Internal Combustion Engine Equipped With Such A Device Or Such An Alternator

A technology of alternator and internal combustion engine, which is applied in the direction of hoisting device, machine/engine, transmission parts, etc., and can solve the problems of expensive and limited use

Inactive Publication Date: 2015-06-03
AB SKF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a material is relatively difficult to develop and is therefore expensive, which practically limits its use in detachable pulleys which should have the lowest possible price cost

Method used

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  • Disconnectable Pulley Device, Alternator Comprising Such A Device And Internal Combustion Engine Equipped With Such A Device Or Such An Alternator
  • Disconnectable Pulley Device, Alternator Comprising Such A Device And Internal Combustion Engine Equipped With Such A Device Or Such An Alternator
  • Disconnectable Pulley Device, Alternator Comprising Such A Device And Internal Combustion Engine Equipped With Such A Device Or Such An Alternator

Examples

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Embodiment Construction

[0020] exist figure 1 with figure 2 A detachable pulley arrangement 1 according to the invention is shown in . The device is suitable to be equipped with a motor vehicle alternator with its shaft 2 in figure 1 is partially shown in . Elements 1 and 2 are part of an internal combustion engine M of a motor vehicle.

[0021] The center of the device 1 lies on the axis X1 , relative to which the adjectives “axial” and “radial” are defined. A direction is axial if it is parallel to the axis X1 and radial if it is perpendicular and secant to said axis X1. A surface is axial if it is perpendicular to the axial direction and radial if it is perpendicular to the radial direction.

[0022] The device 1 comprises an outer pulley 10, a central hub 20 and a free wheel 30 forming a one-way clutch device. The two bearings 40 and 50 are positioned on either side of the live wheel 30 along the axis X1 . The free wheel 30 and the bearings 40 and 50 are positioned in the annular space E ...

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Abstract

This disconnectable pulley device comprises a central member, a pulley mounted around the central member, a free wheel itself comprising several cams mounted between a first slippage path, made on an external radial surface of the central member or of an element secured to this member, and a second slippage path made on an internal radial surface of the pulley or of an element secured to the pulley, the free wheel ensuring a unidirectional clutch between the pulley and the central member. At least one slippage path, from among the first and second slippage path, and / or a portion of the cams intended to interact with one of the slippage paths comprises a tungsten disulfide layer.

Description

technical field [0001] The present invention relates to detachable pulley assemblies. More specifically, the invention belongs to the field of detachable pulleys equipped with free wheels and used, for example, to drive an alternator in an internal combustion engine of an automotive vehicle. Background technique [0002] Such detachable pulleys are used in a known manner to find a remedy for the adverse effects of sudden decelerations or acyclisms of the engine which occur in internal combustion engines, in particular diesel engines at low speeds. Indeed, a drive pulley connected to the engine via the crank pulley may suddenly slow down, while a driven pulley, such as that of an alternator, inertially tends to continue rotating at the same speed. With a rigid coupling between the crank pulley and the shaft of the alternator, the belt is subjected to considerable stress during such changes in instantaneous speed. These speed variations create an abnormal fatigue of the belt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D41/07F16H55/36C23C30/00
CPCF16D13/76F16D55/36F16D2300/10F16D41/07F02B67/06F16D2300/06F16H55/36F16H57/0489
Inventor L.费纳扬A.格佐尔特T.赫德曼
Owner AB SKF
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