Valve train device

Patent metadata

Field	Value
Publication number	US-10801376-B2
Application number	US-201716344713-A
Country	US
Kind code	B2
Filing date	Aug 31, 2017
Priority date	Oct 29, 2016
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A valve train device, particularly for an internal combustion engine, includes a camshaft, a cam element able to be displaced axially on the camshaft, and a mechanical displacement element which is provided on the camshaft for the purpose of axially displacing the cam element. The mechanical displacement element is provided to move the cam element by interaction with only a single contour of the cam element in a first and a second axial direction.

First claim

The invention claimed is:

1. A valve train device, comprising:
a camshaft;
a cam element that is axially displaceable on the camshaft; and
a mechanical displacement element, wherein the cam element is axially displaceable on the camshaft by the mechanical displacement element;
wherein the mechanical displacement element axially displaces the cam element in a first axial direction and a second axial direction by interacting with just one single contour of the cam element;
wherein the mechanical displacement element interacts with the single contour of the cam element to cause an axial component of a movement of the mechanical displacement element;
wherein a form fit between the mechanical displacement element and the cam element causes a switching movement of the cam element;
and wherein the mechanical displacement element only comes into contact with the single contour of the cam element in order to axially displace the cam element.

2. The valve train device according to claim 1 , wherein the mechanical displacement element is a gearwheel.

3. The valve train device according to claim 1 , wherein the mechanical displacement element is rotatable about an eccentric shaft.

4. The valve train device according to claim 1 , wherein the mechanical displacement element is radially displaceable toward the camshaft.

5. The valve train device according to claim 1 further comprising an eccentric bearing element about which the mechanical displacement element is rotatably mounted.

6. The valve train device according to claim 1 , wherein the single contour of the cam element is teeth that do not have an axial incline.

7. The valve train device according to claim 1 further comprising a transmission element that is coupled to the mechanical displacement element and is shiftable radially toward the camshaft between an engagement position and a neutral position.

8. The valve train device according to claim 7 , wherein the transmission element is connected to the mechanical displacement element so as to be fixed in the axial direction and so as to be displaceable in a radial direction.

Assignees

• Daimler Ag

Inventors

• Von Gaisberg-Helfenberg Alexander
• Stolk Thomas

Classifications

• F16H53/04

  Adjustable cams · CPC title

• F01L1/053

  overhead type · CPC title

• F01L2013/0052

  with cams provided on an axially slidable sleeve · CPC title

• F01L13/0042 Primary

  with cams being profiled in axial and radial direction · CPC title

• F01L2001/0473

  Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod · CPC title