Isolating decoupler

a decoupler and isolation technology, applied in the direction of couplings, slip couplings, road transportation, etc., can solve the problems of reducing the operating life of the belt, engine accessory drive system chirp noise,

Inactive Publication Date: 2016-01-21
THE GATES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Effectively isolates alternator vibrations, reduces belt chirp noise, and extends belt life by managing torque transmission and allowing slip in high-torque situations, thereby protecting the system from over-torque damage.

Problems solved by technology

Due to increased crankshaft vibration plus high acceleration / deceleration rates and high alternator inertia the engine accessory drive system is often experiencing belt chirp noise due to belt slip.
This will also reduce the belt operating life.

Method used

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Examples

Experimental program
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Embodiment Construction

[0021]FIG. 1 is a perspective view of the device. FIG. 2 is a cross-section view of the device. Isolating decoupler 100 comprises a pulley 2 which is journalled to a shaft 1 by a bearing 7. Thrust washer 3 is disposed between pulley 2 and end cap 5. Thrust washer 6 is disposed between pulley 2 and shaft 1. Torsion spring 10 is engaged between pulley 2 and carrier 9. Wrap spring 11 is engaged between carrier and shaft 1. Thrust washer 22 is disposed between carrier 9 and radial member 21 of shaft 1. Carrier 9 bears upon thrust washer 22 due to compression of torsion spring between carrier 9 and pulley 2. Carrier 9 and wrap spring 11 comprise the one-way clutch assembly 50. FIG. 6 is a back perspective view of the carrier. FIG. 7 is a front perspective view of the carrier.

[0022]Pulley 2 is axially located on shaft 1 between thrust washers 3 and 6, and retained thereon by end cap 5. Upon installation of the device on the shaft of an alternator (not shown), end cap 5 becomes sandwiched ...

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Abstract

An isolator decoupler comprising a shaft (1), a pulley (2) journalled to the shaft, a torsion spring (10) engaged between the pulley and a carrier (9), the torsion spring loaded in an unwinding direction, a wrap spring (11) engaged between the carrier and the shaft, the wrap spring comprising a cylindrical inner portion (94) and a planar outer portion (93) connected by a tapered portion (155), and the inner portion frictionally engaged with the shaft in a winding direction.

Description

FIELD OF THE INVENTION[0001]The invention relates to an isolating decoupler, and more particularly, to an isolating decoupler comprising a wrap spring engaged between the carrier and the shaft, the wrap spring comprising a cylindrical inner portion and a planar outer portion connected by a tapered portion, and the inner portion frictionally engaged with the shaft in a winding direction.BACKGROUND OF THE INVENTION[0002]Diesel engine use for passenger car applications is increasing due to the benefit of better fuel economy. Further, gasoline engines are increasing compression ratios to improve the fuel efficiency. As a result, diesel and gasoline engine accessory drive systems have to overcome the vibrations of greater magnitude from crankshafts due to above mentioned changes in engines.[0003]Due to increased crankshaft vibration plus high acceleration / deceleration rates and high alternator inertia the engine accessory drive system is often experiencing belt chirp noise due to belt sl...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): B21F35/02F16D41/04
CPCF16D41/04B21F35/02F16D3/12F16D3/72F16D7/022F16D41/20F16D43/211F16H55/36F16D13/76F16D41/206F16H2055/366Y10T29/49611F16D41/203F16D3/66Y02T10/60
InventorSERKH, ALEXANDERSCHNEIDER, DEANHODJAT, YAHYA
OwnerTHE GATES CORP