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Lever-shaped metal sheet cam component

A technology of metal plates and cams, applied to engine components, valve devices, machines/engines, etc., can solve structural space problems and other problems, and achieve the effect of avoiding extrusion creases

Inactive Publication Date: 2008-09-24
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, despite all the measures taken, installation space problems always arise when installing cam assemblies of this type in internal combustion engines

Method used

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  • Lever-shaped metal sheet cam component
  • Lever-shaped metal sheet cam component

Examples

Experimental program
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Embodiment Construction

[0019] The drawing shows a cam assembly 1 of a valve train of an internal combustion engine, here in the form of a valve plunger, which consists of sheet metal. The cam assembly 1 has two parallel side walls 3 a , 3 b connected by a beam 2 . In cross section, the cam assembly 1 constitutes a U-shaped section that is open upward. The bottom surface 4 of the cam assembly 1 has a means 6 of valves on one end 5 . The device 6 is surrounded on both sides by clamping plates 7a, 7b.

[0020] FIG. 2 shows that the side walls 3 a , 3 b merge into a tapering portion 9 in the direction of the end 5 . A length 10 of the same width is attached to this portion 9 as shown in FIG. 2c. This end 5 is thus significantly narrower than the rest of the cam assembly 1 .

[0021] Clamps 7a, 7b are used over a length 10 at one end 5 . As shown in Fig. 2b, the splint is set back towards the side walls 3a, 3b and has a thickness D smaller than that of the side walls 3a, 3b F . It is particularly ...

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Abstract

What is proposed is a lever-type cam follower (1) made of sheet metal, typically for a valve train of an internal combustion engine, said cam follower (1) comprising two parallel side walls (3a, 3b) connected by a crossbeam (2), an underside (4) of the crossbeam (2) having a support (6) for at least one gas exchange valve on one end (5), said support (6) being limited by guide walls (7a, 7b) extending parallel to the side walls (3a, 3b), wherein the one end (5) of the cam follower (1) is narrower than the rest of the length of the cam follower (1), and at least in the region of said one end (5), the side walls (3a, 3b) have a smaller mean wall thickness (DSM) than over the rest of said length, which wall thickness (DSM) increases at least in said region continuously from ends (8a, 8b) of the side walls (3a, 3b) in the direction of the crossbeam (2), and the thickness (DF) of the guide walls (7a 7b) is smaller than the mean wall thickness (DSM) in the region of the narrow one end (5). Such a cam follower (1) requires only a small design space in the region of the one end (5) and has a particularly favorable mass moment of inertia.

Description

technical field [0001] The invention relates to a lever-shaped sheet metal cam assembly, in particular for a valve train of an internal combustion engine, with two parallel side walls connected by a beam, wherein the bottom surface of the beam has means on one end with at least one valve, The device is enclosed by splints running parallel to the side walls. Background technique [0002] This type of cam assembly comes from the DE 100 30 341 A1 which is considered unique. This cam unit is likewise made of sheet metal and has been optimized in terms of its width and its weight in the area of ​​its valve stem bearing. However, installation space problems always arise when installing cam assemblies of this type in internal combustion engines, despite the various measures taken. Furthermore, it can be determined that the moment of inertia of the undesirably accumulated mass is too high away from the pivot point due to the always too large mass. [0003] Precisely in four- or f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/18B21D53/84
CPCF01L1/18F01L1/181F01L1/182F01L1/185
Inventor 罗伯特·卡姆赖因哈德·阿蒙胡贝特·戈伊斯沃尔夫冈·迈尔
Owner SCHAEFFLER TECH AG & CO KG
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