Title:
VALVE TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2023/101003
Kind Code:
A1
Abstract:
The present invention is provided with: a sprocket 1 having a sprocket body 1a and a first annular restriction part 8; a following member 9 affixed to an end section of a camshaft 2; and first ball bearings 10 provided between an outer circumferential surface 9e of a disk-shaped body 9a of the following member and an inner circumferential surface 1e of the sprocket body. An opening 11 which opens in a camshaft direction is provided between the first annular restriction part and a second annular restriction part 19 provided to the disk-shaped body. A first recess 29 which is annular and faces the opening is provided to an outside surface of an outer circumferential section of the disk-shaped body, and the first recess is formed such that an outer circumferential section thereof opens to an inner circumferential surface of an inner ring 10a. A second recess 30 facing the opening is provided in an inner circumferential edge of the first annular restriction part. As a result, favorable smoothness of the first ball bearings, etc., with respect to the inside of a gear reducer can be obtained.
Inventors:
YAMANAKA ATSUSHI (JP)
SATO SHUHEI (JP)
SATO SHUHEI (JP)
Application Number:
PCT/JP2022/044518
Publication Date:
June 08, 2023
Filing Date:
December 02, 2022
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F01L1/352; F01L9/22
Domestic Patent References:
| WO2021085358A1 | 2021-05-06 |
Foreign References:
| US9840947B2 | 2017-12-12 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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