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cam follower

A cam follower, sliding cam technology, applied in the direction of engine components, transmissions, machines/engines, etc., can solve problems such as huge purchase and manufacturing costs, and achieve the effect of good guidance

Inactive Publication Date: 2018-02-02
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The new configuration of the cam follower with narrow rollers relative to the structure requires a huge acquisition and manufacturing cost of tools and machines

Method used

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Examples

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Effect test

Embodiment Construction

[0017] A cam follower 1 is shown as a sheet metal drawbar for a valve drive of an internal combustion engine. The cam follower has two substantially vertical side walls 2 , 3 which are connected by an upper crosspiece 4 such that an inverted U-shaped profile is formed in cross section.

[0018] On the underside 5 of the crosspiece 4 a device 7 for a ventilation valve is applied at one end 6 . On the other end 24 of the crosspiece 4 , on the underside 5 , a spherical segment-shaped contact surface 25 for the support element is shown.

[0019] The crosspiece 4 has a rectangular frame-like recess 9 penetrated by a roller 8 . The roller 8 is used for camming and in this case runs on a pin 10 placed in the side walls 2 , 3 via a bearing 23 . as by figure 2 As can be seen, a needle bearing arrangement is provided as bearing means 23 which extends with a slight axial play directly in front of the inner surfaces 19 , 20 of the side walls 2 , 3 . It can also be seen that the side ...

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Abstract

The present invention relates to a cam follower. It has two side walls ( 2 , 3 ) connected by a cross piece ( 4 ), on the bottom side ( 5 ) of the cam follower, on one end ( 6 ), a device for a gas exchange valve is applied (7), wherein the crosspiece (4) has a recess (9) penetrated by rollers (8) on pins placed in the side walls (2, 3) The pin (10) runs through a bearing mechanism (23), and is used at least for indirect cam actuation, characterized in that the roller (8) is so narrow that the outer ends (11, 12) of the roller are relative to the The longitudinal faces ( 13 , 14 ) of the recess ( 8 ) are clearly spaced without contact, wherein at least one guide shoulder ( 15 , 16 ) follows from each of the longitudinal faces ( 13 , 14 ) to the cam. The longitudinal center plane of the moving element protrudes, guiding the rollers (8) on the inner sides (17, 18) of the guiding shoulders.

Description

technical field [0001] The invention relates to a rod-shaped cam follower for a valve drive of an internal combustion engine, the cam follower having two side walls connected by a crosspiece, on the bottom side of the cam follower, applied at one end for Device for gas exchange valves in which the crosspiece has a recess penetrated by a roller running on a support mechanism on a pin placed in the side wall and used at least for indirect cam actuation. Background technique [0002] From document DE 10 2010 013 216 A1 figure 1 Such a cam follower is obtained from , here for a variable sliding cam valve drive of an internal combustion engine with an internal combustion system. [0003] For example, in today's cylinder head concepts of compact internal combustion engines with sliding cam valve control, only very little installation space is available for the necessary components. This means that, especially for camming, the rollers must be kept relatively narrow. Narrow rolle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/047F01L13/00
CPCF01L1/185Y10T74/2107F16H25/14
Inventor 奥利弗·维特尔米夏埃尔·克雷斯
Owner SCHAEFFLER TECH AG & CO KG
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