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Crankshaft decoupler

A technology for separators and drive shafts, which is applied in the direction of couplings, clutches, slip couplings, etc., and can solve the problems of reduced durability of auxiliary drive components

Active Publication Date: 2006-11-01
LITENS AUTOMOTIVE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in unacceptable noise levels and vibrations, and reduced durability of auxiliary drive components due to high fluctuating loads and vibrations

Method used

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Examples

Experimental program
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Embodiment Construction

[0020] refer to figure 1 , internal combustion engines for automobiles are generally denoted by 10. Engine 10 includes a number of belt-driven accessories 12 such as alternators, compressors, and the like. A pulley 14 is operably coupled to each belt drive accessory 12 for driving the component 12 by rotation of the pulley 14 . Engine 10 also includes a crankshaft 16 that generally provides a mechanical torque output resulting from operation of engine 10 . An endless serpentine belt 18 is mounted around the pulley 14 of each belt driven attachment 12 . The belt 18 is driven in the drive direction by the rotation of the crankshaft 16 , which causes the pulley 14 to rotate. A crankshaft torque adjuster or decoupler assembly 20 is operably coupled between the crankshaft 16 and the belt 18 .

[0021] Referring to FIG. 2, the separator assembly 20 is shown in exploded view and includes an output pulley 22 having an annular outer track 24 defined by a pair of spaced apart, raise...

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PUM

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Abstract

A decoupler assembly (20) is provided for transferring rotational torque between a drive shaft (16) and a drive belt (18) of an automotive engine. The decoupler assembly includes a drive hub (40) configured to be fixedly secured to the drive shaft. A pulley (22) is rotatably coupled to the drive hub (40) and adapted to be drivingly engaged with the belt (18). A spring shell (70, 100) is operatively coupled between the drive hub and the pulley for selective rotation therewith and a biasing member (130) is operatively coupled between the spring shell and the drive hub for isolating oscillatory vibrations between the drive hub and the pulley caused by rotation of the drive shaft. A clutch element (140) is seated between the spring shell (70, 100) and the pulley (22) for selectively transferring rotational torque from the drive hub to the pulley. The pulley (22) includes an inner clutch surface (26) and the clutch element includes a plurality of coils in frictional engagement with the inner clutch surface and an end coupled to the spring shell for expanding the coils against the inner clutch surface upon rotation of the spring shell with the drive hub to selectively transfer torque between the drive hub (40) and the pulley (22).

Description

technical field [0001] The present invention relates to a crankshaft and drive assembly of an automobile, and more particularly to a disconnect assembly that allows the drive assembly to overspeed or temporarily run at a speed different from the crankshaft and to allow the drive assembly to be disconnected from the crankshaft or mechanically Ground isolation and reduce torsional vibration between them. Background technique [0002] It is well known in automobile engines that endless serpentine belts are used in order to transmit a portion of the engine output to a plurality of belt driven accessories. Typically, each belt driven accessory includes a pulley drivingly associated with the belt, and the belt is driven through an output pulley coupled directly to the crankshaft. [0003] The internal combustion engine works as an impulsive system, constantly accelerating and decelerating and causing the engine to vibrate. Because of these varying speeds, the belt-driven accesso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D13/10B62M9/00F16D7/02F16D13/12F16D41/20F16D43/26F16F15/123F16F15/129F16H55/36
CPCF16D7/022F16D13/12F16D43/26F16F15/123F16H55/14F16H55/36F16H2055/366F16D7/00F16D13/10F16D43/00
Inventor 贝尔特·梅菲森詹姆斯·W·德尔约翰·安特恰克
Owner LITENS AUTOMOTIVE INC
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