Title:
HYDRAULIC CONTROL MECHANISM FOR MARINE REDUCTION AND REVERSING GEAR
Document Type and Number:
Japanese Patent JP3295471
Kind Code:
B2
Abstract:
PURPOSE: To prevent the connecting shock of a hydraulic clutch by holding the back pressure of the back chamber spool of an operating oil pressure regulating valve to zero in a position immediately before entering a complete fit-in state even in the case of operating a trawling lever or the like suddenly into a complete fit-in position from a trawling position.
CONSTITUTION: In a marine reduction and reversing gear, operating oil from an operating oil pump P is supplied to an ahead clutch 4 or an astern clutch 3 through a trawling valve V2 and an ahead-astern switching valve V1. The pressure of the operating oil is regulated by an operating oil pressure regulating valve L1 formed of a back chamber spool 5 and a relief spring 6. In this case, pressure oil having passed the throttle hole 7 of the ahead-astern switching valve V1 from the operating oil pump p is supplied to the tact chamber part of the back chamber spool 5, so that a pressure oil path reaching the back chamber spool 5 is communicated with an oil passage 30 opened/closed by the trawling lever spool 8 of the trawling valve V2. The trawling valve V2 is provided with a drilled hole communicated with a drain communicating oil passage immediately before reaching a complete fit-in position.
Inventors:
Toshio Imanaka
Kazuyoshi Harada
Kazuyoshi Harada
Application Number:
JP30993A
Publication Date:
June 24, 2002
Filing Date:
January 05, 1993
Export Citation:
Assignee:
Yanmar Diesel Co., Ltd.
International Classes:
B63H23/08; B63H23/30; F16H61/00; (IPC1-7): F16H61/00; B63H23/30
Domestic Patent References:
| JP3272329A | ||||
| JP62165026A |
Attorney, Agent or Firm:
Juichiro Yano