Ship propulsion systems and ships
The innovative configuration of the ship propulsion system locates the shift mechanism inside the upper case and the actuator within the cowl, addressing complexity and seawater ingress issues, thereby improving reliability and efficiency.
JP2026096229APending Publication Date: 2026-06-15YAMAHA MOTOR CO LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- YAMAHA MOTOR CO LTD
- Filing Date
- 2024-12-03
- Publication Date
- 2026-06-15
AI Technical Summary
⚠Technical Problem
Existing ship propulsion systems, particularly those of the lower steering type, have inadequate arrangements for actuators and shift mechanisms, leading to complexity and potential seawater ingress issues.
⚗Method used
A ship propulsion system configuration where the shift mechanism is located inside the upper case and the actuator is housed within the cowl, simplifying the lower case structure and preventing seawater ingress, while reducing the required space for the actuator.
🎯Benefits of technology
This configuration simplifies the lower case design and prevents seawater entry into the actuator, enhancing reliability and efficiency by reducing mechanical complexity and potential failure points.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026096229000001_ABST
Abstract
This simplifies the internal structure of the lower case and prevents the rotation of the lower case from being restricted by the presence of the shift mechanism. [Solution] The ship propulsion system comprises a cowl, an upper case, a lower case rotatably supported relative to the upper case around a steering axis, an engine housed within the cowl, a propeller shaft supported by the lower case, a drive transmission mechanism housed in the upper and lower cases, an electrically operated actuator having an output shaft, and a shift mechanism housed in the upper case. The drive transmission mechanism selectively performs a first transmission state in which the propeller shaft rotates in a first rotational direction, and a second transmission state in which the propeller shaft rotates in a second rotational direction opposite to the first rotational direction. The shift mechanism switches the drive transmission mechanism between the first transmission state and the second transmission state in accordance with the rotation of the actuator's output shaft.
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