Title:
ENGINE STARTER
Document Type and Number:
WIPO Patent Application WO/2002/090796
Kind Code:
A1
Abstract:
In a friction roller type reduction gear (3a) disposed in the middle of a passage for transmitting power from a starter motor to the rotary shaft of an engine, a relation Pmean>&lcub (Umax)1&sol 2&rcub &sol 9 or Pmean>0.3[GPa] is satisfied, assuming the maximum circumferential speed of a drive side cylindrical surface (42) under use state is Umax[m&sol sec], and the mean abutting pressure at the outer diameter side abutting part (50b) of a movable roller (25) based on the preload of a compression coil spring (45) is Pmean[GPa]. According to the arrangement, transmission efficiency is ensured by preventing slip at both inner and outer diameter side abutting parts (49a, 49b, 50a, 50b) even during light load operation and damage due to seizure can also be prevented.
Inventors:
OTAKI RYOICHI (JP)
Application Number:
PCT/JP2002/003775
Publication Date:
November 14, 2002
Filing Date:
April 16, 2002
Export Citation:
Assignee:
NSK LTD (JP)
OTAKI RYOICHI (JP)
OTAKI RYOICHI (JP)
International Classes:
F02N15/02; F02N15/04; F02N15/08; F16H3/06; F16H13/14; (IPC1-7): F16H13/08; F16H13/10; F02N15/02; F02N15/08; H02K7/18
Foreign References:
| JP2001059469A | 2001-03-06 | |||
| EP0856462A2 | 1998-08-05 | |||
| JP2002013604A | 2002-01-18 | |||
| JP2000061189A | 2000-02-29 | |||
| JPS59113357A | 1984-06-30 | |||
| JP2000120820A | 2000-04-28 | |||
| JPH08247240A | 1996-09-24 | |||
| JP2000297730A | 2000-10-24 |
Attorney, Agent or Firm:
Kamoda, Asao (2-15-17 Nishi-Shimbash, Minato-ku Tokyo, JP)
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