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Title:
VALVE TIMING CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR MANUFACTURING SAID VALVE TIMING CONTROL APPARATUS
Document Type and Number:
WIPO Patent Application WO/2016/143593
Kind Code:
A1
Abstract:
This valve timing control apparatus is provided with: an electric motor for rotating a cam sprocket relatively with respect to a timing sprocket; an eccentric shaft part disposed on the motor output shaft of the electric motor and having an outer circumferential surface that is eccentric with respect to the center of rotation thereof; an internal teeth constituent part integrally coupled to a sprocket body and having a plurality of internal teeth on the inner circumference thereof; a plurality of rollers 48 disposed between the outer circumferential surface of the eccentric shaft part and each of the internal teeth; and a retainer 41 integrally provided on an outer circumferential side of a fixed end section 9a of a driven member 9 and having roller holding holes 41c which respectively hold the rollers, wherein the retainer has clearance grooves 42a, 42b, each of which has a circular annular groove shape and is not in contact with a grinding tool, are notched in the inner circumferential surface and the outer circumferential surface of a region including the hole edges of the holding holes. Thus, it is possible to suppress a degradation in durability and grinding efficiency of a grinding tool for grinding the retainer.

Inventors:
TADOKORO RYO (JP)
DOI ISAO (JP)
Application Number:
PCT/JP2016/056162
Publication Date:
September 15, 2016
Filing Date:
March 01, 2016
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F01L1/356
Domestic Patent References:
WO2010018821A12010-02-18
Foreign References:
JP2013167181A2013-08-29
JP2014025481A2014-02-06
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
Hiromichi Kobayashi (JP)
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