Title:
CRANK STRUCTURE AND RECIPROCATING ENGINE EQUIPPED WITH THE CRANK STRUCTURE
Document Type and Number:
Japanese Patent JP2023060794
Kind Code:
A
Abstract:
To provide a crank structure that can easily achieve a long stroke and has a simple structure, and to provide a reciprocating engine assembled with the crank structure.SOLUTION: A crank structure 10 is provided with an annular portion 15 equipped with an internal gear 15a on a base end side of a connection rod 11, and is rotatably arranged with a gear 16 engaged with the internal gear in the annular portion. A disc-shaped eccentric free rotor 17 coaxially overlapped with the gear is slidably and rotatably fitted in the annular portion. A ratio of a diameter of the gear and an inner diameter of the internal gear is 1:2, and a ratio of a diameter between a crank pin 12 journaling the gear and a crank shaft, a rotation radius of a crank arm 13, and the inner diameter of the internal gear is 1:4. Therefore, when the connection rod reciprocates, as compared with a conventional crank structure in which a crank arm makes one rotation with the same diameter as the inner diameter of the internal gear, the connection rod can a gain twice of the conventional one, and thus easily achieve a long stroke.SELECTED DRAWING: Figure 1
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Inventors:
KONDO TADAMI
Application Number:
JP2021189845A
Publication Date:
April 28, 2023
Filing Date:
November 24, 2021
Export Citation:
Assignee:
NIPPON VIDEO CENTER KK
International Classes:
F02B75/32; F01B9/02
Domestic Patent References:
| JPS4963806A | 1974-06-20 | |||
| JPS5757951A | 1982-04-07 | |||
| JPS549363A | 1979-01-24 |
Foreign References:
| WO2008010490A1 | 2008-01-24 | |||
| US20100031916A1 | 2010-02-11 | |||
| EP0829618A1 | 1998-03-18 |
Attorney, Agent or Firm:
Hajime Miyake
Masaya Ariga
Masaya Ariga
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