Zero endplay crankshaft

Patent metadata

Field	Value
Publication number	US-12442413-B2
Application number	US-202318104415-A
Country	US
Kind code	B2
Filing date	Feb 1, 2023
Priority date	Sep 2, 2020
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A biasing member assembled with a bearing and a crankshaft wherein the bearing is configured to receive the crankshaft. The crankshaft is assembled with an internal combustion engine. The biasing member biases the bearing in an axial direction relative to the crankshaft to reduce an endplay of the crankshaft while the engine is operable in a normal operating condition. The biasing member provides a resilient biasing force for biasing the bearing into engagement with a cylinder block when the crankshaft is operational to thereby eliminate or reduce the crankshaft endplay and improve the sealing performance of a crankshaft axial seal.

First claim

What is claimed is:

1. An apparatus for a crankshaft of an internal combustion engine, the apparatus comprising:
a bearing configured to receive the crankshaft;
a biasing member positioned between the crankshaft and the bearing, wherein an axis of the biasing member is aligned with an axis of the bearing, the biasing member biases the bearing towards a cylinder block in an axial direction relative to the crankshaft to reduce an endplay of the crankshaft while the crankshaft is operational.

2. The apparatus of claim 1 , wherein the internal combustion engine is operable in a normal operating condition.

3. The apparatus of claim 2 , wherein the normal operating condition does not include one of a clutch actuation time period or a shift event.

4. The apparatus of claim 1 , wherein the biasing member is a spring.

5. The apparatus of claim 1 , wherein the bearing includes a thrust bearing.

6. The apparatus of claim 1 , wherein the bearing includes a journal bearing.

7. The apparatus of claim 1 , wherein the bearing has a U-shape.

8. An apparatus for a bearing assembled with a crankshaft of an internal combustion engine, the apparatus comprising:
a biasing member positioned between the crankshaft and the bearing, wherein an axis of the biasing member is aligned with an axis of the bearing, the biasing member configured to bias the bearing towards a cylinder block in an axial direction relative to the crankshaft to reduce an endplay of the crankshaft while the crankshaft is operational.

9. The apparatus of claim 8 , wherein the internal combustion engine is operable in a normal operating condition.

10. The apparatus of claim 9 , wherein the normal operating condition does not include one of a clutch actuation time period or a shift event.

11. The apparatus of claim 8 , wherein the biasing member is a spring.

12. The apparatus of claim 8 , wherein the bearing includes a thrust bearing.

13. The apparatus of claim 8 , wherein the bearing includes a journal bearing.

14. The apparatus of claim 8 , wherein the bearing has a U-shape.

15. An apparatus for a bearing assembled with a crankshaft and a cylinder block of an internal combustion engine, the apparatus comprising:
a biasing member positioned between the crankshaft and the bearing, wherein an axis of the biasing member is aligned with an axis of the bearing, the biasing member configured to bias the bearing into engagement with the cylinder block while the crankshaft is operational.

16. The apparatus of claim 15 , wherein the internal combustion engine is operable in a normal operating condition.

17. The apparatus of claim 16 , wherein the normal operating condition does not include one of a clutch actuation time period or a shift event.

18. The apparatus of claim 15 , wherein the biasing member is a spring.

19. The apparatus of claim 15 , wherein the bearing includes a thrust bearing or a journal bearing.

20. The apparatus of claim 15 , wherein the bearing has a U-shape.

Assignees

• Cummins Inc

Inventors

• Weber Gregory A
• Luehrmann Mark G
• Harwood Parker Emory

Classifications

• F02B77/00

  Component parts, details or accessories, not otherwise provided for · CPC title

• F16C2240/14

  Preload · CPC title

• F16C9/03

  Arrangements for adjusting play · CPC title

• F16C27/02 Primary

  Sliding-contact bearings · CPC title

• F16C17/107

  with at least one surface for radial load and at least one surface for axial load · CPC title