Title:
CRANKSHAFT BEARING STRUCTURE
Document Type and Number:
Japanese Patent JP2022136653
Kind Code:
A
Abstract:
To provide a crankshaft bearing structure capable of discharging granular foreign matters from between a journal bearing and a crank journal, and of securing an appropriate hydraulic pressure even when using low-viscosity oil.SOLUTION: A crankshaft has a plurality of crank journals extending along an axial center Ax1 and arranged at intervals in a direction along the axial center Ax1. On each crank journal, a journal bearing is annularly mounted. The journal bearing consists of an upper journal bearing 36 covering an upper half periphery of the crankshaft, and a lower journal bearing covering a lower half periphery. The upper journal bearing 36 has an oil hole 36b penetrating through between an inner peripheral face 36a and the outer peripheral face, and a groove 36c connected to the oil hole 36b and formed in the inner peripheral face 36a in the direction along the axial center Ax1. The groove 36c extends to both ends 36d, 36e.SELECTED DRAWING: Figure 4
Inventors:
TAMASATO HIROTAKA
Application Number:
JP2021036365A
Publication Date:
September 21, 2022
Filing Date:
March 08, 2021
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F16C9/02; F02F7/00; F16C3/08; F16C17/02
Attorney, Agent or Firm:
Masataka Kotani
Etsushi Kotani
Tsutomu Fukunari
Etsushi Kotani
Tsutomu Fukunari