Sealed cover with nozzle

Patent metadata

Field	Value
Publication number	US-12241540-B2
Application number	US-202318324502-A
Country	US
Kind code	B2
Filing date	May 26, 2023
Priority date	Jun 10, 2022
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

A powertrain system includes a housing that defines a reservoir. A shaft is rotatably disposed in the housing, and the shaft defines a bore. A cap is positioned to seal the reservoir. The cap defines an opening configured to supply lubricant to the shaft. The opening in the cap is positioned proximal the shaft to spray the lubricant into the bore. In one form, the cap has a nozzle, and the nozzle defines the opening configured to supply the lubricant to the shaft. The shaft is configured to rotate about a rotational axis, and the bore extends along the rotational axis of the shaft. The nozzle is aligned with the rotational axis of the shaft to spray the lubricant into the bore in order to lubricate bearings and other parts of the system.

First claim

What is claimed is:

1. A system, comprising:
a housing defining a reservoir;
a shaft rotatably disposed in the housing;
wherein the shaft defines a bore;
a cap positioned to seal the reservoir;
wherein the cap defines an opening configured to supply lubricant to the shaft;
wherein the opening in the cap is positioned proximal the shaft to spray the lubricant into the bore;
wherein the cap includes a crown and a collar extending transverse to the crown;
a cap seal sandwiched between the cap and the housing;
wherein the cap seal wraps around the collar of the cap;
wherein the cap has a lip extending from the collar; and
wherein the lip of the cap retains the cap seal.

2. The system of claim 1 , wherein:
the cap has a nozzle; and
the nozzle defines the opening configured to supply the lubricant to the shaft.

3. The system of claim 2 , wherein:
the shaft is configured to rotate about a rotational axis;
the bore extends along the rotational axis of the shaft; and
the nozzle is aligned with the rotational axis of the shaft to spray the lubricant into the bore.

4. The system of claim 3 , wherein the nozzle extends into the bore in the shaft.

5. The system of claim 2 , further comprising:
a bearing disposed between the shaft and the housing to facilitate rotation of the shaft; and
wherein the nozzle and the shaft at the bore define a nozzle gap configured to facilitate flow of at least some of the lubricant to the bearing.

6. The system of claim 2 , further comprising:
a bearing disposed between the shaft and the housing to facilitate rotation of the shaft;
an end plate secured to one end of the shaft; and
wherein the end plate is configured to secure the bearing to the shaft.

7. The system of claim 6 , wherein the nozzle extends through the end plate.

8. The system of claim 6 , wherein the cap is spaced from the end plate to facilitate flow of the lubricant to the bearing.

9. The system of claim 8 , wherein:
the bearing includes an inner race and an outer race; and
the end plate engages the inner race of the bearing.

10. The system of claim 1 , further comprising:
a bearing disposed between the shaft and the housing to facilitate rotation of the shaft; and
wherein the cap defines an orifice to supply the lubricant to the bearing.

11. The system of claim 1 , wherein the shaft defines one or more lubrication channels configured to supply the lubricant from the bore to the outside of the shaft.

12. The system of claim 1 , wherein the cap is configured to remain stationary as the shaft rotates.

13. The system of claim 1 , wherein the lubricant in the reservoir is under low pressure.

14. A system, comprising:
a shaft, wherein the shaft is configured to rotate about a rotational axis;
wherein the shaft defines a bore;
wherein the bore extends along the rotational axis of the shaft;
wherein the bore in the shaft is configured to transport lubricant;
a housing defining a reservoir;
a cap positioned proximal to an end of the shaft;
wherein the cap is positioned to seal the reservoir;
wherein the cap has a nozzle;
wherein the nozzle is aligned with the rotational axis of the shaft to spray the lubricant into the bore;
wherein the cap includes a crown and a collar extending transverse to the crown;
wherein the cap has a lip extending from the collar;
a cap seal sandwiched between the cap and the housing;
wherein the cap seal wraps around the collar of the cap; and
wherein the lip of the cap retains the cap seal.

15. The system of claim 14 , wherein:
the nozzle extends into the bore in the shaft; and
the cap is configured to remain stationary as the shaft rotates.

16. A system, comprising:
a housing defining a reservoir;
a shaft rotatably disposed in the housing;
wherein the shaft defines a bore;
a cap positioned to seal the reservoir;
wherein the cap defines an opening configured to supply lubricant to the shaft;
wherein the opening in the cap is positioned proximal the shaft to spray the lubricant into the bore;
wherein the cap has a nozzle;
wherein the nozzle defines the opening configured to supply the lubricant to the shaft;
wherein the shaft has an end surface that faces the cap;
wherein the shaft has a shaft inlet at the bore;
wherein the shaft inlet defines a first opening into the bore;
wherein the first opening is located at the end surface of the shaft;
wherein the shaft inlet defines a shaft inlet opening;
wherein the shaft inlet opening is located inside of the shaft distally away from the end surface of the shaft;
wherein the shaft inlet is beveled from the first opening to the shaft inlet opening to form a countersink type opening;
wherein the nozzle has a nozzle outlet;
wherein the nozzle outlet has a nozzle outlet end with the opening;
wherein the nozzle outlet end is disposed axially between the first opening and the shaft inlet opening to define a nozzle insertion depth;
wherein the nozzle outlet and the shaft inlet define a nozzle gap; and
wherein the nozzle gap facilitates lubricant leakage from the shaft inlet while the lubricant flows through the bore.

17. The system of claim 16 , further comprising:
a bearing disposed between the shaft and the housing to facilitate rotation of the shaft;
an end plate secured to one end of the shaft;
wherein the end plate is configured to secure the bearing to the shaft; and
wherein the nozzle extends through the end plate.

18. The system of claim 17 , wherein:
the bearing includes an inner race and an outer race; and
the end plate engages the inner race of the bearing.

19. The system of claim 18 , wherein:
the cap includes a crown and a collar extending transverse to the crown; and
the collar is configured to engage the outer race of the bearing.

20. The system of claim 19 , further comprising:
a cap seal sandwiched between the cap and the housing;
wherein the cap seal wraps around the collar of the cap;
wherein the cap has a lip extending from the collar; and
wherein the lip of the cap retains the cap seal.

21. The system of claim 17 , wherein the shaft defines one or more lubrication channels configured to supply the lubricant from the bore to the outside of the shaft.

Assignees

• Allison Transm Inc

Inventors

• Morris Austin

Classifications

• F16H57/0471

  Bearing · CPC title

• F16H57/043

  within rotary parts, e.g. axial channels or radial openings in shafts · CPC title

• F01M2011/022

  for lubricating cylinders · CPC title

• F16H57/0426 Primary

  Means for guiding lubricant into an axial channel of a shaft · CPC title

• F01M11/02 Primary

  Arrangements of lubricant conduits · CPC title