Chain guide

Patent metadata

Field	Value
Publication number	US-11619298-B2
Application number	US-202017136298-A
Country	US
Kind code	B2
Filing date	Dec 29, 2020
Priority date	Mar 10, 2020
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

An object of the present invention is to provide a chain guide that can improve functional properties of a chain drive system. The chain guide of the present invention is attached to an engine block by a mounting bolt and slidably guides a running chain. The chain guide includes a mounting part provided with a shaft hole through which a mounting bolt is passed, and an oil jet passage for injecting lubricating oil, supplied to the shaft hole at a predetermined pressure, toward the chain.

First claim

What is claimed is:

1. A chain guide attached to an engine block by a mounting bolt and slidably guiding a running chain, the chain guide comprising:
a mounting part provided with a shaft hole through which the mounting bolt is passed;
an oil jet passage for injecting lubricating oil, supplied to the shaft hole at a predetermined pressure, toward the chain; and
in an attachment surface that is to be attached to the engine block, an oil inlet passage for making an oil supply port of the engine block and the shaft hole communicate with each other, wherein
the chain guide is configured to be pivotable around the mounting bolt serving as a pivot shaft, and
the oil inlet passage includes an oil collecting groove at a position opposite the oil supply port of the engine block, the oil collecting groove being formed to extend along a circular arc, with the pivot shaft being a center thereof.

2. The chain guide according to claim 1 , wherein
the mounting bolt includes an oil passage making the oil supply port of the engine block and the shaft hole communicate with each other,
the oil passage is configured to have an oil inlet port opened at a distal end in an axial direction of the mounting bolt and an oil release port opened in a side face of a shaft part of the mounting bolt.

3. The chain guide according to claim 1 , wherein the oil jet passage is formed by an oil jet hole having an oil inlet port opened in an inner surface of the shaft hole, and a circumferential groove is formed to at least one of an inner face of the shaft hole and a side face of the mounting bolt, at a position where the oil inlet port of the oil jet hole opens.

Assignees

• Tsubakimoto Chain Co

Inventors

• Shimosaka Koichi

Classifications

• F16N2210/33

  Chains · CPC title

• F16H57/028

  characterised by means for reducing vibration or noise · CPC title

• F01M1/08

  Lubricating systems characterised by the provision therein of lubricant jetting means · CPC title

• F16H7/06

  with chains · CPC title

• F16N7/14

  the lubricant being conveyed from the reservoir by mechanical means (by pumping devices F16N7/36, F16N7/38; adaptations for lubrication of machines or engines in general, of internal-combustion engines F01M) · CPC title