Roller Cam Followers

A technology of roller cams and moving parts, applied in engine components, machines/engines, mechanical equipment, etc., can solve problems such as consumption, and achieve the effect of reducing grinding work, economical manufacturing, and fast passing time

Inactive Publication Date: 2016-07-06
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the housing extends almost over the entire axial extent of the roller cam follower, its outer peripheral surface must be finely ground completely, which is expensive

Method used

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  • Roller Cam Followers
  • Roller Cam Followers

Examples

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Embodiment Construction

[0017] The figure shows a roller cam follower 1 . The roller cam follower is used to reciprocate the rocker arm in an overhead valve train with an underlying camshaft. The roller cam follower consists of a roller tappet 2 , which actuates a piston of a high-pressure fuel pump to and fro, and a hydraulic bearing element 3 . Here the bearing element 3 rests in the recess 4 of the roller tappet 2 formed by the upper side 13 of the bridge section 10 and the inner peripheral surface 7 of the housing 5 . The adapter ring 21 serves as a connecting element.

[0018] The roller tappet 2 has a cylindrical housing 5 with a protruding anti-rotation fastening 6 , which here is present as a pin. The inner peripheral surface 7 of the housing is spaced apart from the edges 8, 9 of the housing 5, approximately at half the height, and is spanned by a bridge section 10, below which a cam roller 11 is arranged, so that The cam rollers are supported on pins 12 mounted in the housing 5 .

[001...

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PUM

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Abstract

The roller cam follower (1) comprises a hydraulic support unit (3) and a down or lateral cam shaft of an internal combustion engine. The roller cam follower is assembled from a roller shaft (2) for the stroke operation of a piston of a fuel high pressure pump and the hydraulic support unit. An independent claim is also included for a roller shaft has a support unit which is received in sections in a recess.

Description

technical field [0001] The present invention relates to a roller cam follower for reciprocating operation of a rocker arm in an overhead valve train of an internal combustion engine, said overhead valve train having a camshaft located either below or laterally above. Background technique [0002] This roller cam follower consists of DE3638202's figure 1 shown in . Such a roller cam follower has a relatively high mass, which disadvantageously constitutes a vibrating valve train mass. The cam rollers are accommodated in recesses in the housing and thus determine their radial extent over almost the entire height of the housing. Since the housing extends almost over the entire axial extent of the roller cam follower, its outer peripheral surface has to be finely ground completely, which is expensive. Furthermore, it has been found that the construction / manufacturing of the roller cam followers, especially in small series, is cost-intensive, and the roller cam followers usuall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/14F01L1/18
CPCF01L1/14F01L1/143F01L1/182F01L1/255F01L2305/00F01L2307/00
Inventor M·舍韦P·赛勒N·盖尔
Owner SCHAEFFLER TECH AG & CO KG
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