Articulated chain with low-friction link plate back

a technology of link plate back and articulation chain, which is applied in the direction of chain elements, belts/chains/gearings, and belts/chains/gearings, etc., can solve the problems of power loss and cosub>2 emission of internal combustion engines, and achieve the effect of improving the friction occurring

Active Publication Date: 2015-01-15
IWIS MOTORSYSTEME GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention aims to improve the performance of an articulated chain used in tensioning and guiding systems by reducing friction between the chain and the rails.

Problems solved by technology

When the articulated chain comes into contact with the tensioning and guide rails, friction is generated, which, in turn, leads to power losses and consequently to CO2 emission from the internal combustion engine.

Method used

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Examples

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Embodiment Construction

[0030]FIG. 1 shows a timing chain drive for an internal combustion engine. The timing chain drive 1 comprises two overhead camshaft chain wheels 2.1 and 2.2, a lower crankshaft chain wheel 3, an articulated timing chain 4 wrapped around these chain wheels, a guide rail 5 and a pivotably arranged tensioning rail 6 pressed against the timing chain 4 by means of a chain tensioner 8 screwed in position in the crankcase 7. The chain tensioner 8 is preferably connected to the engine oil hydraulic system so that its tensioning piston 9 is hydraulically pressed onto the pivotably arranged tensioning rail 6. Both the guide rail 5 and the tensioning rail 6 abut with their sliding covers on the link plate backs of the chain link plates 12, 15 of the timing chain 4 running therealong. This leads to friction losses, which are reduced through the structural design of the chain embodiments described hereinbelow.

[0031]The first embodiment of the timing chain 4 described with reference to FIGS. 2 to...

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PUM

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Abstract

An articulated chain having alternating inner and outer chain links connected by hinge, having a running direction, each inner link comprising a link plate and each outer link comprising two link plates and two hinge pins interconnecting, each hinge pin rotationally fixed in an opening of the associated outer link plates and extending through an opening of the associated inner link to form a chain hinge, the links having plate backs for contact with a tensioning or guide rail. The link plate back comprises a leading area viewed in the running direction and an adjoining trailing area, the leading area extending substantially parallel to a plane projected between center lines of pin openings and hinge openings, respectively, and the trailing area extending from a part of the link plates at an angle to the plane projected between the center lines, the vertex of the angle pointing in the running direction.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to foreign European Patent Application EP 13003469.7, filed on Jul. 9, 2013, the disclosure of which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention relates to an articulated chain having alternating inner chain links and outer chain links connected to one another by means of a chain hinge, and having a running direction, each inner chain link comprising at least one inner link plate and each outer chain link comprising at least two outer link plates and two chain hinge pins interconnecting the same, each chain hinge pin being arranged in a rotationally fixed manner in a pin opening of the associated outer link plates and extending through a hinge opening of the associated inner chain link so as to form a chain hinge, and the inner and / or outer chain links having link plate backs that are adapted to be brought into contact with a tensioning and / or guide ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16G13/06F16H7/08
CPCF16H7/08F16G13/06F16G13/04F16G13/08
Inventor BELMER, STEFANMOLTER, ROLF
Owner IWIS MOTORSYSTEME GMBH & CO KG
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