Engine lubricating device

Patent metadata

Field	Value
Publication number	US-10132215-B2
Application number	US-201514959174-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Mar 27, 2015
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

There is provided an engine lubricating device with which passage resistance of an oil strainer can be reduced and a support stay for an oil filter is unnecessary. An oil strainer includes an outer cylinder and an inner cylinder, the outer cylinder and the inner cylinder respectively have straight central axes and form inner and outer double cylinders, the outer cylinder has a strainer inlet at a lower end, the inner cylinder has a peripheral wall formed as a filter portion, the oil strainer is led out in an orientation inclined downward from the cylinder block toward an inner bottom portion of an oil pan, an upper end portion of the outer cylinder is fixed to a cylinder block, and an upper end opening portion of the inner cylinder communicates with an oil passage inlet of the cylinder block.

First claim

What is claimed is:

1. An engine lubricating device comprising a cylinder block, an oil strainer, and an oil pan, the oil strainer and the oil pan mounted to a lower portion of the cylinder block and a strainer inlet of the oil strainer being open at a central portion of an inner bottom of the oil pan,
wherein the oil strainer includes an outer cylinder and an inner cylinder, the outer cylinder and the inner cylinder form straight inner and outer double cylinders, the outer cylinder has the strainer inlet at a lower end, the inner cylinder has a peripheral wall formed as a filter portion,
the oil strainer is led out in an orientation inclined downward from the cylinder block toward the inner bottom portion of the oil pan, an upper end portion of the outer cylinder is fixed to the cylinder block, and an upper end opening portion of the inner cylinder communicates with an oil passage inlet of the cylinder block, and
wherein the inner cylinder has a closing plate and a plurality of shake preventing protrusions, the closing plate closes an entire area of a lower end of the inner cylinder and protrudes from the lower end of the inner cylinder toward an inner peripheral face of the outer cylinder, the respective shake preventing protrusions protrude radially from an outer peripheral edge of the closing plate toward the inner peripheral face of the outer cylinder, and oil passage ports positioned between the shake preventing protrusions adjacent in a circumferential direction of the outer peripheral edge of the closing plate are provided between the outer peripheral edge of the closing plate and the inner peripheral face of the outer cylinder so that engine oil is introduced into an area around the filter portion of the inner cylinder through the oil passage ports narrowed with the closing plate and the shake preventing protrusions, without being introduced from the lower end of the inner cylinder into the inner cylinder.

2. The engine lubricating device according to claim 1 ,
wherein the outer cylinder has an outer mounting portion and a seal flange receiving portion, the inner cylinder has a seal flange,
the seal flange of the inner cylinder is held and pressed between the seal flange receiving portion of the outer cylinder and the cylinder block and a seal ring is held and pressed between the seal flange of the inner cylinder and the cylinder block by fixing the outer cylinder mounting portion to the cylinder block.

3. The engine lubricating device according to claim 2 ,
wherein the outer cylinder mounting portion and the seal flange receiving portion are integrally molded with the outer cylinder and the seal flange is integrally molded with the inner cylinder.

4. The engine lubricating device according to claim 1 ,
wherein inlets of the oil passage ports have opening sectional areas gradually reducing toward the area around the filter portion of the inner cylinder, and
a sectional shape of the shake preventing protrusion has a lower vertex portion facing to a side of the strainer inlet along a direction of central axes of the outer cylinder and the inner cylinder.

5. The engine lubricating device according to claim 1 ,
wherein the filter portion of the inner cylinder is in a tapered shape having a diameter increasing from the closing plate at a lower end toward the upper end opening portion.

6. The engine lubricating device according to claim 1 ,
wherein the closing plate and the shake preventing protrusions are integrally molded with the inner cylinder.

7. The engine lubricating device according to claim 2 ,
wherein inlets of the oil passage ports have opening sectional areas gradually reducing toward the area around the filler portion of the inner cylinder.

8. The engine lubricating device according to claim 3 ,
wherein inlets of the oil passage ports have opening sectional areas gradually reducing toward the area around the filter portion of the inner cylinder.

9. The engine lubricating device according to claim 2 ,
wherein the filter portion of the inner cylinder is in a tapered shape having a diameter increasing from the closing plate at a lower end toward the upper end opening portion.

10. The engine lubricating device according to claim 3 ,
wherein the filter portion of the inner cylinder is in a tapered shape having a diameter increasing from the closing plate at a lower end toward the upper end opening portion.

11. The engine lubricating device according to claim 4 ,
wherein the filter portion of the inner cylinder is in a tapered shape having a diameter increasing from the closing plate at a lower end toward the upper end opening portion.

12. The engine lubricating device according to claim 7 ,
wherein the filter portion of the inner cylinder is in a tapered shape having a diameter increasing from the closing plate at a lower end toward the upper end opening portion.

13. The engine lubricating device according to claim 8 ,
wherein the filter portion of the inner cylinder is in a tapered shape having a diameter increasing from the closing plate at a lower end toward the upper end opening portion.

14. The engine lubricating device according to claim 2 ,
wherein the closing plate and the shake preventing protrusions are integrally molded with the inner cylinder.

15. The engine lubricating device according to claim 3 ,
wherein the closing plate and the shake preventing protrusions are integrally molded with the inner cylinder.

16. The engine lubricating device according to claim 4 ,
wherein the closing plate and the shake preventing protrusions are integrally molded with the inner cylinder.

17. The engine lubricating device according to claim 7 ,
wherein the closing plate and the shake preventing protrusions are integrally molded with the inner cylinder.

Assignees

• Kubota Kk

Inventors

• Nagai Kentaro
• Goto Hideyuki
• Yamazaki Takahiro
• Oso Hiroki

Classifications

• F01M2001/1078

  comprising an oil pick-up tube to oil pump, e.g. strainer · CPC title

• F01M2011/007

  Oil pickup tube to oil pump, e.g. strainer · CPC title

• F01M1/10 Primary

  Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters · CPC title

• F01M2001/0292

  Sealings · CPC title

• F01M11/0004 Primary

  Oilsumps · CPC title