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    • 81. 发明专利
    • SUPPORT DEVICE FOR WATER JET PROPULSION DEVICE
    • JPH03292289A
    • 1991-12-24
    • JP9463190
    • 1990-04-10
    • SANSHIN KOGYO KK
    • ITO KAZUMASAKATO KOJI
    • B63H11/08B63H21/30
    • PURPOSE:To prevent vibration of a ship hull and the generation of noise due to the vibration by supporting both the casing of a water jet unit and a power transmission system with a vibration insulating member therebetween in a state to separate the two members away from the ship hull, and resiliently intercoupling a crank shaft and the power transmission shaft system. CONSTITUTION:A water jet propulsion device is formed such that both an engine and the impeller of a water jet unit 11 through a power transmission shaft system 13 extending through a partition wall 3. In this case, in the power transmission shaft system 13, vibration of an input shaft 36 is absorbed by a vibration insulating member 45 located between an outer case 39 of a front bearing unit 38 and an inner case 44. A flange part 48a of a coupling shaft 48 secured to the front end of the input shaft 36 is coupled to a flange part 35b of an output shaft 35a, spline-coupled to the end part of a crank shaft, through a coupling 49 made of rubber. Further, the water jet unit 11 is securely fastened against a ship hull 2 through a vibration insulating member 61 previously incorporated in a leg part 60 for securing.
    • 89. 发明专利
    • VIBRATION ISOLATOR FOR SHIP ENGINE
    • JPH02154830A
    • 1990-06-14
    • JP30726588
    • 1988-12-05
    • KAYABA INDUSTRY CO LTD
    • KASHIMA MITSUHIROMIYAMOTO KOICHI
    • B63H21/30F16F15/027F16F15/04F16M7/00
    • PURPOSE:To obtain a vibration isolator effective for both low-frequency large vibration and high-frequency slight vibration of an engine by concurrently using air springs and damping force-variable dampers and controlling the damping force of the dampers interlockingly with functions of the start and stable operation of the engine. CONSTITUTION:When a self-starting motor switch is closed at the time of starting engine, a control circuit (not shown in the figure) feeds the control signal to increase the damping force of dampers 4 to actuators 15, and this control signal is continued only while the self-starting switch is closed. The rigidity of the dampers 4 is thus increased, the function of a throttle 14 provided on the right and left passages of air springs 3 is added, and they serve effectively to isolate the large-amplitude vibration of an engine 1. When the engine 1 is shifted to the stable operation, the control circuit receives the release of the self-starting motor switch and feeds the signal to decrease the damping force of the actuators 15. As a result, the rigidity of the dampers 4 is decreased, and they are effective to isolate slight vibration. Large-amplitude vibration and slight vibration can be isolated by one device.