Valve rotating device

Patent metadata

Field	Value
Publication number	US-11486276-B2
Application number	US-201917298302-A
Country	US
Kind code	B2
Filing date	Nov 22, 2019
Priority date	Nov 28, 2018
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

The invention relates to a valve rotating device (24) for a valve (10), preferably an intake valve or exhaust valve, of an internal combustion engine. The valve rotating device (24) has a valve restoring spring (22) for preloading the valve (10) toward a closed position of the valve (10) and a Belleville spring (40), which is arranged in operative connection between the valve restoring spring (22) and a support surface (44), which is lubricated with a lubricating fluid. An at least partially, preferably completely, peripherally extending collar portion (46) is arranged on a periphery, preferably inner periphery, of the Belleville spring (40). The collar portion (46) can have a wear-reducing effect and/or can make the valve rotating device (24) easier to install.

First claim

The invention claimed is:

1. A valve rotating device for a gas exchange valve of an internal combustion engine, the valve rotating device comprising:
a valve return spring configured to bias the valve in a direction towards a closed position of the valve;
a Belleville spring arranged in operative connection between the valve return spring and a lubricated support surface the Belleville spring configured to be compressed into a flattened shape under a force of the valve return spring when the valve is opened so as to be supported with sliding friction by a lubricating fluid between the Belleville spring and the support surface which enables a rotation of the valve; and
a fully circumferential collar portion extending from an inner circumference of the Belleville spring.

2. The valve rotating device as claimed in claim 1 , wherein:
when in the flattened shape, the Belleville spring is parallel to the support surface.

3. The valve rotating device as claimed in claim 1 , wherein:
the Belleville spring comprises an elastically deformable main body portion having a conical and annular disk shape, and:
the collar portion is angled in relation to the main body portion.

4. The valve rotating device as claimed in claim 1 , wherein:
the collar portion extends substantially parallel to and/or coaxially with a valve axis of the valve and/or a longitudinal axis of a valve body of the valve.

5. The valve rotating device as claimed in claim 1 , wherein:
the collar portion is configured to radially support of the Belleville spring.

6. The valve rotating device as claimed in claim 5 , wherein:
the collar portion is configured to radially support the Belleville spring with respect to a valve axis of the valve.

7. The valve rotating device as claimed in claim 1 , wherein:
the collar portion lays flat against a valve element of the valve.

8. The valve rotating device as claimed in claim 7 , wherein:
the valve element is a valve guide of the valve.

9. The valve rotating device as claimed in claim 1 , wherein:
a cylinder head comprises the support surface.

10. The valve rotating device as claimed in claim 1 , further comprising:
an annular element which comprises the support surface.

11. The valve rotating device as claimed in claim 10 , wherein:
the annular element is a second Belleville spring or a washer.

12. The valve rotating device as claimed in claim 10 , wherein:
the annular element is arranged in an operative connection between the Belleville spring and a cylinder head.

13. The valve rotating device as claimed in claim 10 , wherein:
the collar portion grips partially around an inner circumferential side of the annular element.

14. The valve rotating device as claimed in claim 10 , wherein:
the Belleville spring and the annular element are coupled together via the collar portion so as to form a common assembly unit.

15. The valve rotating device as claimed in claim 1 , wherein:
the Belleville spring is arranged in a first recess of a cylinder head, the first recess configured to be filled with lubricating fluid, and
the collar portion is arranged in a second recess of the cylinder head, the second recess arranged in the first recess.

16. A motor vehicle comprising the valve rotating device as claimed in claim 1 .

Assignees

• Man Truck & Bus Se

Inventors

• Boehme Ulrich

Classifications

• F01L1/32 Primary

  characterised by the provision of means for rotating lift valves, e.g. to diminish wear · CPC title

• F01L3/08

  Valves guides; Sealing of valve stem, e.g. sealing by lubricant · CPC title

• F01L1/462

  Valve return spring arrangements · CPC title

• F01L2303/00

  Manufacturing of components used in valve arrangements · CPC title

• F01L2810/02

  Lubrication · CPC title