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Belt pulley decoupler

A pulley and decoupler technology, which is applied in the direction of clutches, one-way clutches, springs/shock absorbers, etc., and can solve problems such as limiting the compactness of pulley decouplers

Pending Publication Date: 2021-10-12
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above factors all limit the compactness of the overall structure of the pulley decoupler

Method used

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Embodiment Construction

[0018] The specific implementation of the pulley decoupler according to the present invention will be described below with reference to the accompanying drawings. The following detailed description and drawings are used to illustrate the principles of the present invention. The present invention is not limited to the described preferred embodiments, and the protection scope of the present invention is defined by the claims.

[0019] According to an embodiment of the present invention, there is provided an alternator pulley decoupler installed in an engine front end accessory drive system. figure 1 A cross-sectional view of a pulley decoupler according to one embodiment of the present invention is shown. Such as figure 1 As shown, the pulley decoupler includes a pulley 1 , a mandrel 2 , a decoupling spring 3 , a sleeve 4 and a torsion spring 5 arranged coaxially. The pulley 1 and the mandrel 2 are hollow cylindrical as a whole, and the pulley 1 is rotatably supported radially...

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Abstract

The invention relates to a belt pulley decoupler. The belt pulley decoupler comprises a belt pulley, a mandrel, a decoupling spring, a sleeve, a torque spring, a thrust washer and a bearing which are coaxially arranged, wherein the belt pulley is rotatably supported on the radial outer side of the mandrel through the bearing; the decoupling spring is connected with the belt pulley in an anti-torsional mode, and the torque spring is connected with the mandrel in the anti-torsional mode; the sleeve is installed between the belt pulley and the radial direction of the mandrel, and connected between the decoupling spring and the torque spring in a one-way torque transmission mode, the thrust washer abuts between the bearing and the sleeve axially; and the belt pulley decoupler further comprises a limiting protrusion connected with the mandrel in an anti-torsional mode. The thrust washer is connected with the sleeve in the anti-torsional mode, and a limiting groove partially extending in the circumferential direction is formed in the radial inner side of the thrust washer; and the limiting protrusion extends into the limiting groove towards the radial outer side, and can be rotated in the limiting groove in the circumferential direction, and therefore the relative rotation range of the mandrel and the sleeve is limited. The belt pulley decoupler disclosed by the invention has a compact structure.

Description

technical field [0001] The invention relates to the technical field of engines. Specifically, the present invention relates to a pulley decoupler. Background technique [0002] In an engine front end accessory drive system (front end accessory drive, FEAD), an alternator pulley decoupler (alternator pulley decoupler, APD) is usually required. The pulley decoupler compensates for the torsional vibrations introduced by the crankshaft of the internal combustion engine into its auxiliary belt drive. In the prior art, a one-way clutch is usually formed by frictional engagement of a coil spring and a sleeve. This freewheel transfers drive torque from the pulley to the sleeve in the engaged state. The torsion spring connected in series with the decoupling spring absorbs torsional vibrations from the belt drive through elastic deformation. And when the pulley is delayed in rotation, the one-way clutch is open, and no significant torque can be transferred from the sleeve to the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D41/20F16F15/133
CPCF16D41/206F16F15/13121F16F15/1337
Inventor 张忠学王云
Owner SCHAEFFLER TECH AG & CO KG
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