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Accessory drive decoupler

A technology of components and assemblies, applied in the direction of automatic clutches, clutches, one-way clutches, etc., which can solve the problems of noise, damage to the integrity of the system or components, and reduced service life of the belt system or individual components.

Active Publication Date: 2015-11-04
DAYCO IP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at some operating points and / or conditions, these speeds and frequencies create undesired noise, compromise system or component integrity, or reduce the useful life of belt systems or individual components
Current solutions provide a go beyond the presence of attachments, others provide torsional isolation, but improvements are needed that perform better, last longer and are more cost-effective to manufacture

Method used

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  • Accessory drive decoupler
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Examples

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Embodiment Construction

[0024] The following detailed description of the invention will illustrate the general principles of the invention, examples of which are further illustrated in the accompanying drawings. In the drawings, the same reference numerals indicate the same elements or functionally similar elements.

[0025] refer to figure 1 For example, an accessory drive system 10 of an internal combustion engine of a motor vehicle includes an endless belt 30 for driving several accessories. The accessories are in figure 1 is represented diagrammatically by its pulley assembly. Belt 30 is routed around crank pulley assembly 12 , fan / water pump pulley assembly 14 , alternator pulley assembly 16 , power steering pulley assembly 18 , idler pulley assembly 20 and tensioner pulley assembly 22 . In some embodiments, the tensioner pulley assembly 22 includes damping, such as asymmetrical damping with friction dampers, to resist lifting of the tensioner arm away from the belt 30 .

[0026] The various...

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PUM

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Abstract

Pulley assemblies are disclosed that include a pulley body, a hub disposed within the bore of the pulley body, and a one-way clutch concentric about the hub. The one-way clutch has a plurality of cantilevered members that each include a friction surface and a cantilevered end and a biasing member in contact with one cantilevered member to bias the cantilevered members into continuous frictional engagement with the bore of the pulley body. Each of the cantilevered members is pivotable about its cantilevered end and is partially nested within an adjacent cantilevered member to form an annular body. This construction places the friction surface of each cantilevered member facing the bore of the pulley body. In operation, the pulley body rotates in a predominant direction which activates the plurality of cantilevered members to link the pulley body to the hub for simultaneous rotation.

Description

technical field [0001] The present application relates generally to pulleys, and more particularly to a pulley assembly including a decoupling mechanism with or without isolation, the decoupling mechanism including a self-energizing cantilever member. Background technique [0002] It is known to utilize a vehicle engine to drive various automotive accessory components including, for example, water pumps, alternators / generators, fans for cooling coolant, power steering pumps, and compressors. In particular, a drive pulley actuated by the motor vehicle's engine shaft drives an endless drive belt, which in turn drives an accessory assembly through a driven pulley. [0003] Periodic torque pulses, e.g. through the ignition of an internal combustion engine, produce large speed transitions which interrupt the smooth operation of the driven components. In addition, inertial and driven speed transitions associated with starting, stopping, satisfactory braking, shifting, etc. also i...

Claims

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Application Information

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IPC IPC(8): F16D41/20
CPCF16H55/36F16D43/18F16D2043/145F16H2055/366
Inventor A·E·拉努蒂K·G·达蒂尔J·H·米勒
Owner DAYCO IP HLDG
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