Marine propulsion

By arranging the motor with its output shaft in the fore-and-aft direction and optimizing transmission mechanisms, the vertical dimension of the boat propulsion unit is reduced, addressing the issue of large vertical dimensions in conventional designs.

JP2026041185APending Publication Date: 2026-03-10SUZUKI MOTOR CORP
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-08-26
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

The vertical dimension of conventional boat propulsion units is large due to the axial dimension of motors being larger than their radial dimension, particularly in outboard motors where the motor is vertically mounted.

Method used

The motor is arranged with its output shaft in the fore-and-aft direction, and the transmission mechanisms are positioned accordingly to reduce the vertical dimension, with the propeller shaft extending rearward.

Benefits of technology

This configuration reduces the vertical dimension of the boat propulsion unit by utilizing the smaller radial dimension of the motor, allowing for a more compact design.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 2026041185000001_ABST
    Figure 2026041185000001_ABST
Patent Text Reader

Abstract

To reduce the vertical dimension of a marine propulsion unit. [Solution] The marine propulsion unit 1 comprises a motor 3, a drive shaft 8, a reduction gear 9 that transmits the rotation of the output shaft 4 of the motor 3 to the drive shaft 8 while slowing down the rotation, a propeller shaft 13, a rotation transmission mechanism 14 that transmits the rotation of the drive shaft 8 to the propeller shaft 13, and a propeller 20, wherein the motor 3 is arranged so that the extension direction of the output shaft 4 is the fore-and-aft direction, the reduction gear 9 is arranged in front of the motor 3, the rotation transmission mechanism 14 is arranged below the reduction gear 9, the drive shaft 8 extends in the up-and-down direction between the reduction gear 9 and the rotation transmission mechanism 14, the propeller shaft 13 extends rearward from the rotation transmission mechanism 14, and the propeller 20 is provided at the rear of the propeller shaft 13.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Electric outboard motor

    JP2005162055A