Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rotationally locked tappet of a valve timing mechanism

A valve driving and anti-rotation technology, which is applied in the direction of valve devices, engine components, machines/engines, etc., can solve the problems of structural space constraints and high requirements for skirt materials that cannot be ruled out

Inactive Publication Date: 2012-10-10
MAHLE INT GMBH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantageously, due to the length of the clip on the inside of the tappet, the construction space is greatly restricted, in addition, the two legs of the two clips must have a high degree of spring preload in order to ensure the necessary tight fit of the anti-rotation assembly, Thus the use of thin-walled skirts, in particular unacceptably high demands on the skirt material cannot be ruled out

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotationally locked tappet of a valve timing mechanism
  • Rotationally locked tappet of a valve timing mechanism
  • Rotationally locked tappet of a valve timing mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] according to figure 1 , the anti-rotation positioning tappet 1 of the internal combustion engine valve drive has a base plate 2 and an apron 3, wherein the internal combustion engine is not shown. The anti-rotation locking tappet 1 is preferably designed as a piston tappet and is usually placed between a cam and a valve, which are not shown, eg between a control cam and a gas exchange valve. In this arrangement, the tappet 1 carries out an oscillating motion running back and forth in the receiving cylinder of the cylinder head 4, not shown (see image 3 d) A guide groove is provided in the cylinder head 4, wherein the guide groove protrudes radially outwards to engage the anti-rotation assembly 6 of the anti-rotation positioning tappet 1 . The anti-rotation assembly 6 is seated in a recess 7 of the skirt 3 of the tappet 1 .

[0029] according to figure 1 , the anti-rotation assembly 6 has two spring arms 8 , 8 ′ extending in the peripheral direction of the skirt 3 or...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a rotationally locked tappet (1) of a valve timing mechanism of an internal combustion engine, which tappet is arranged between a cam and a valve and is guided in a receiving bore of a cylinder head (4). Here, a radially protruding anti-rotation safeguard (6) which slides in a guide groove (5) of the cylinder head (4) is arranged in a recess (7, 7') of the skirt (3). It is essential to the invention here that the anti-rotation safeguard (6) has two spring arms (8, 8') which extend in the circumferential direction of the tappet (1), bear at least in regions either against an inner circumferential surface (16) of the skirt (3) or against an outer circumferential surface (10) of the tappet (1) and fix the anti-rotation safeguard (6) on the tappet (1) by a clamping force which acts radially on said tappet (1).

Description

technical field [0001] The invention relates to an anti-rotationally secured tappet, which is preferably used in a valve drive of an internal combustion engine. Background technique [0002] German patent document DE 196 00 852 A1 discloses an anti-rotation positioning tappet of an internal combustion engine valve drive, preferably a bucket tappet mainly composed of a base and a skirt, It is placed between the cam and the valve and is guided in the receiving bore of the cylinder head. An anti-rotation assembly is placed in the recess of the apron, which is guided in a guide groove of the cylinder head. The anti-rotation assembly is designed as an elastic spring element and comprises a back and two clips attached to it, which clips are clamped in two longitudinal slits in the skirt of the tappet. Disadvantageously, due to the length of the clips on the inside of the tappet, the construction space is greatly restricted, in addition, the two legs of the two clips must have a ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/14
CPCF01L2107/00F01L1/14F01L1/143F01L2307/00
Inventor 马里奥·普罗科普
Owner MAHLE INT GMBH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com