Title:
CRANK SHAFT BEARING STRUCTURE
Document Type and Number:
Japanese Patent JP2023032711
Kind Code:
A
Abstract:
To provide a crank shaft bearing structure capable of properly lubricating a thrust bearing even when an oil of low viscosity is used in an engine.SOLUTION: A crank shaft bearing structure 100 includes a crank shaft 1, a cylinder block, a plurality of journal bearings 36-45, and thrust bearings 46-49. The plurality of journal bearings 36-45 are annularly mounted on the plurality of crank journals 11-15 in a state that the crank shaft 1 is rotatable. The thrust bearings 46-49 are mounted on a shaft support portion for pivotally supporting the crank journal 14 in the cylinder block and restricts movement to a direction along a shaft center Ax1 of the crank shaft 1. The upper journal bearing 42 annularly mounted on the crank journal 14 has a peripheral groove connected to an oil hole at its inner peripheral surface and extending in a circumferential direction.SELECTED DRAWING: Figure 1
Inventors:
TAMASATO HIROTAKA
WADA SHIGERU
MISAKI YUKIO
KUMAGAI KOJI
SASAKI TATSUNORI
ONDA TAKAHIRO
WADA SHIGERU
MISAKI YUKIO
KUMAGAI KOJI
SASAKI TATSUNORI
ONDA TAKAHIRO
Application Number:
JP2021138994A
Publication Date:
March 09, 2023
Filing Date:
August 27, 2021
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F16C9/02; F01M1/06; F02F1/20; F02F7/00; F16C17/02; F16C17/04
Attorney, Agent or Firm:
Masataka Kotani
Tsutomu Fukunari
Tsutomu Fukunari