Title:
SPRING DEVICE
Document Type and Number:
Japanese Patent JP2020056487
Kind Code:
A
Abstract:
To precisely determine fatigue of a leaf spring.SOLUTION: A spring device 4 includes a cylindrical body 41 which is disposed between a fuel injection valve 2 and a bolt head portion 31, and opening at both ends: a plurality of leaf springs 42 stored in the cylindrical body 41, and aligned in an axial direction of a bolt 3; and a washer 43 disposed between a bolt head portion 31 and the plurality of leaf springs 42, and energized toward the bolt head portion 31 by the plurality of leaf springs 42. The washer 43 has a lower end portion 43b embedded in the cylindrical body 41, and an upper end portion 43a projecting out from an opening end 41a of the cylindrical body 41. At the upper end portion 43a of the washer 43, a collar portion 44 increased in a diameter as compared with its lower end portion 43b is provided. When the plurality of leaf springs 42 shows normal energizing force, the collar portion 44 projects out with a predetermined gap h or more, with respect to the opening end 41a of the cylindrical body 41.SELECTED DRAWING: Figure 3A
Inventors:
KAKIMOTO YASUSHI
Application Number:
JP2018189358A
Publication Date:
April 09, 2020
Filing Date:
October 04, 2018
Export Citation:
Assignee:
JAPAN ENGINE CORP
International Classes:
F16F1/32; F02M61/14; F16B31/02; F16B39/24; F16B43/00; F16F3/02
Domestic Patent References:
| JPS545055B2 | 1979-03-13 | |||
| JP2016169807A | 2016-09-23 | |||
| JPS62100316U | 1987-06-26 | |||
| JPS59144160U | 1984-09-26 | |||
| JPS5339211U | 1978-04-05 | |||
| JPS61145110U | 1986-09-08 |
Attorney, Agent or Firm:
Maeda patent office