Shift device for outboard motor

Patent metadata

Field	Value
Publication number	US-11738843-B2
Application number	US-202117191111-A
Country	US
Kind code	B2
Filing date	Mar 3, 2021
Priority date	Mar 19, 2020
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A shift device for an outboard motor includes a forward gear and a reverse gear; a clutch gear; a shift actuator configured to move between a neutral reference position where the clutch gear is disengaged from the forward gear and the reverse gear and an engagement reference position where the clutch gear is engaged with the forward gear or the reverse gear; and a control device configured to control a movement of the shift actuator. The control device is configured to set an intermediate target position, and to set a speed at which the shift actuator moves from the intermediate target position to the engagement reference position slower than a speed at which the shift actuator moves from the neutral reference position to the intermediate target position.

First claim

The invention claimed is:

1. A shift device for an outboard motor, comprising:
a forward gear and a reverse gear arranged so as to face each other;
a clutch gear arranged between the forward gear and the reverse gear;
a shift actuator configured to move between a neutral reference position where the clutch gear is disengaged from the forward gear and the reverse gear and an engagement reference position where the clutch gear is engaged with the forward gear or the reverse gear; and
a control device configured to control a movement of the shift actuator,
wherein the control device is configured to set an intermediate target position between the neutral reference position and the engagement reference position, and to set a speed at which the shift actuator moves from the intermediate target position to the engagement reference position slower than a speed at which the shift actuator moves from the neutral reference position to the intermediate target position.

2. The shift device according to claim 1 , wherein the intermediate target position is a position where engagement of the clutch gear with the forward gear or the reverse gear is started.

3. The shift device according to claim 1 , wherein the intermediate target position is a position immediately before engagement of the clutch gear with the forward gear or the reverse gear is started.

4. The shift device according to claim 1 , further comprising a shift sensor configured to directly detect a position of the shift actuator,
wherein the control device is configured to identify the position of the shift actuator based on a signal from the shift sensor.

5. The shift device according to claim 1 , wherein the engagement reference position is a position where an engagement width with which the clutch gear is engaged with the forward gear or the reverse gear is maximized.

6. The shift device according to claim 5 , further comprising:
a shift slider coupled to the clutch gear; and
a link mechanism connecting the shift actuator and the shift slider,
wherein the control device keeps on moving the shift actuator by a length corresponding to a deflection amount of the link mechanism after the shift actuator moves from the neutral reference position to the engagement reference position.

7. The shift device according to claim 5 , wherein the control device is configured to set an engagement maintenance position between the engagement reference position and a position where the engagement of the clutch gear with the forward gear or the reverse gear is started, and
in a case where the shift actuator moves from the engagement reference position to the engagement maintenance position without any relationship with a command signal from the control device, the control device restores the shift actuator from the engagement maintenance position to the engagement reference position.

8. The shift device according to claim 1 , further comprising a shift motor configured to move the shift actuator,
wherein the control device is configured to set a duty ratio of the shift motor during a movement of the shift actuator from the intermediate target position to the engagement reference position lower than a duty ratio of the shift motor during a movement of the shift actuator from the neutral reference position to the intermediate target position.

9. The shift device according to claim 1 , wherein the control device is configured to set a speed at which the shift actuator moves from the engagement reference position to the intermediate target position slower than a speed at which the shift actuator moves from the intermediate target position to the neutral reference position.

10. The shift device according to claim 1 , wherein the control device is configured to control the movement of the shift actuator according to an electric signal from an operation device configured to accept an input operation by a user.

Assignees

• Honda Motor Co Ltd

Inventors

• Takeshige Takamasa
• Aikawa Naoki
• Miyauchi Tomohiro

Classifications

• B63H21/21 Primary

  Control means for engine or transmission, specially adapted for use on marine vessels · CPC title

• B63H20/14 Primary

  Transmission between propulsion power unit and propulsion element · CPC title

• F16D11/14

  with clutching members movable only axially (F16D11/02, F16D11/08 take precedence) · CPC title

• F16H59/044

  consisting of electrical switches or sensors · CPC title

• F16H61/0246

  characterised by initiating reverse gearshift · CPC title