Cam cap

Patent metadata

Field	Value
Publication number	US-2016290182-A1
Application number	US-201615083933-A
Country	US
Kind code	A1
Filing date	Mar 29, 2016
Priority date	Mar 30, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

A cam cap is placed on a journal of a camshaft attached to a sprocket to constitute a bearing supporting the journal. The cam cap includes an accommodating groove in which a thrust plate provided on the journal is accommodated, an oil passage having an opening at a position facing a camshaft oil groove of the journal, the oil passage communicating with the accommodating groove, and an oil reservoir provided in a first sidewall of the accommodating groove. The cam cap is placed on the journal such that the accommodating groove is located at a position closer to the sprocket than is the opening of the oil passage. When the thrust plate is accommodated in the accommodating groove, the oil passage and the oil reservoir communicate with each other at a position outward of an outer peripheral edge of the thrust plate in a radial direction of the thrust plate.

First claim

What is claimed is:

1 . A cam cap configured to be placed on a journal of a camshaft attached to a sprocket, the cam cap constituting a bearing that supports the journal, the cam cap comprising:
an accommodating groove configured to accommodate a thrust plate of the journal, the accommodating groove having a first sidewall and a second sidewall, the first and second sidewalls opposing each other, the first sidewall being located in a portion of the cam cap that is closer to the sprocket than the second sidewall when the cam cap is placed on the journal of the camshaft; an oil passage having an opening at a position facing a camshaft oil groove of the journal when the cam cap is placed on the journal of the camshaft, the oil passage communicating with the accommodating groove; and an oil reservoir provided in the first sidewall, the oil reservoir being a recess, wherein when the cam cap is placed on the journal of the camshaft, the accommodating groove is located at a position closer to the sprocket than is the opening of the oil passage, and when the cam cap is placed on the journal of the camshaft such that the thrust plate is accommodated in the accommodating groove, the oil passage and the oil reservoir communicate with each other, at a position outward of an outer peripheral edge of the thrust plate in a radial direction of the thrust plate.

2 . The cam cap according to claim 1 , wherein:
the oil passage has a vertical bore and a horizontal bore; the vertical bore extends in a radial direction of the camshaft from the opening at the position facing the camshaft oil groove; the horizontal bore intersects with the vertical bore and the accommodating groove; and the oil reservoir is a distal end portion of the horizontal bore.

3 . The cam cap according to claim 2 , further comprising a sealing plug that seals an opening of the horizontal bore, the opening being located on a side surface of the cam cap, wherein
the horizontal bore extends from the side surface of the cam cap into the cam cap.

4 . The cam cap according to claim 1 , further comprising a sealing plug, wherein:
the oil passage has a vertical bore and a horizontal bore; the vertical bore extends in a radial direction of the camshaft from the opening at the position facing the camshaft oil groove; the horizontal bore extends from a side surface of the cam cap, the side surface being located on a sprocket side of the cam cap, and the horizontal bore intersects with the accommodating groove and the vertical bore; the sealing plug seals an opening of the horizontal bore, the opening being located on the side surface of the cam cap; and the oil reservoir is an end portion of the horizontal bore, the end portion extending between the first sidewall of the accommodating groove and an end of the sealing plug.

5 . The cam cap according to claim 2 , wherein the vertical bore is provided at a position facing the camshaft oil groove.

6 . The cam cap according to claim 4 , wherein the vertical bore is provided at a position facing the camshaft oil groove.

Assignees

• Toyota Motor Co Ltd

Inventors

• Musha Yoshio

Classifications

• F02F7/00

  Casings, e.g. crankcases · CPC title

• F01M9/102

  of camshaft bearings · CPC title

• F01L2250/02

  the camshaft being driven by chains · CPC title

• F01L2810/02

  Lubrication · CPC title

• F01L2001/0476

  Camshaft bearings · CPC title