Trim and tilt device

Patent metadata

Field	Value
Publication number	US-11866138-B2
Application number	US-202117344356-A
Country	US
Kind code	B2
Filing date	Jun 10, 2021
Priority date	Dec 18, 2020
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A trim and tilt device includes: a cylinder; a piston; a rod; and a rod guide. The rod includes a first end to which the piston is fixed, and the piston includes an insertion hole to which the first end of the rod is inserted. Over an entire periphery of the rod guide, a lower end of an outer peripheral surface of the rod guide that is in contact with the inner peripheral surface of the cylinder is located closer to a second end of the rod than a lower end of a first inner peripheral surface of the rod guide where the outer peripheral surface of the rod is slidable. An upper end of an outer peripheral surface of the piston is located closer to the second end of the rod than an upper end of the insertion hole.

First claim

What is claimed is:

1. A trim and tilt device comprising:
a bottomed cylindrical cylinder that stores a fluid;
a piston that is slidable on an inner peripheral surface of the cylinder in an axial direction of the cylinder;
a rod that is a rod-shaped member, the rod including a first end to which the piston is fixed and a second end located at an opposite side to the first end in the axial direction and located outside the cylinder; and
a rod guide that is fixed to the cylinder and slidably supports an outer peripheral surface of the rod in the axial direction,
wherein over an entire periphery of the rod guide, a lower end of a first outer peripheral surface of the rod guide that is in contact with the inner peripheral surface of the cylinder is located closer to the second end than a lower end of a first inner peripheral surface of the rod guide where the outer peripheral surface of the rod is slidable,
wherein the piston includes a second outer peripheral surface that is slidable on the inner peripheral surface of the cylinder and an insertion hole to which the first end of the rod is inserted, and
wherein an upper end of the second outer peripheral surface is located closer to the second end than an upper end of the insertion hole.

2. The trim and tilt device according to claim 1 ,
wherein the piston includes a second end surface that is an end surface facing toward the second end and has an annular shape,
wherein the second end surface connects the second outer peripheral surface and the insertion hole, and
wherein the second end surface is tilted relative to a radial direction of the cylinder in a cross section including an axis of the cylinder.

3. The trim and tilt device according to claim 2 ,
wherein the second end surface has a groove that allows the fluid to flow.

4. The trim and tilt device according to claim 1 ,
wherein the rod guide includes a first end surface that is an end surface facing toward the first end and has an annular shape, and the first end surface connects the first outer peripheral surface and the first inner peripheral surface, and
wherein the first end surface is tilted relative to a radial direction of the cylinder in a cross section including an axis of the cylinder.

5. The trim and tilt device according to claim 4 ,
wherein the first end surface has a groove that allows the fluid to flow.

6. The trim and tilt device according to claim 1 ,
wherein an upper end surface of the cylinder is tilted in a manner in which a diameter of the upper end surface of the cylinder is reduced as going toward the piston, and
wherein the rod guide has a contact surface that is in surface contact with the upper end surface of the cylinder over the entire periphery.

7. The trim and tilt device according to claim 2 ,
wherein the rod guide includes a first end surface that is an end surface facing toward the first end and has an annular shape, and the first end surface connects the first outer peripheral surface and the first inner peripheral surface, and
wherein the first end surface is tilted relative to the radial direction of the cylinder in the cross section including the axis of the cylinder.

8. The trim and tilt device according to claim 7 ,
wherein the first end surface has a groove that allows the fluid to flow.

9. The trim and tilt device according to claim 2 ,
wherein an upper end surface of the cylinder is tilted in a manner in which a diameter of the upper end surface of the cylinder is reduced as going toward the piston, and
wherein the rod guide has a contact surface that is in surface contact with the upper end surface of the cylinder over the entire periphery.

10. The trim and tilt device according to claim 3 ,
wherein the rod guide includes a first end surface that is an end surface facing toward the first end and has an annular shape, and the first end surface connects the first outer peripheral surface and the first inner peripheral surface, and
wherein the first end surface is tilted relative to the radial direction of the cylinder in the cross section including the axis of the cylinder.

11. The trim and tilt device according to claim 10 ,
wherein the first end surface has a groove that allows the fluid to flow.

12. The trim and tilt device according to claim 3 ,
wherein an upper end surface of the cylinder is tilted in a manner in which a diameter of the upper end surface of the cylinder is reduced as going toward the piston, and
wherein the rod guide has a contact surface that is in surface contact with the upper end surface of the cylinder over the entire periphery.

13. The trim and tilt device according to claim 4 ,
wherein an upper end surface of the cylinder is tilted in a manner in which a diameter of the upper end surface of the cylinder is reduced as going toward the piston, and
wherein the rod guide has a contact surface that is in surface contact with the upper end surface of the cylinder over the entire periphery.

14. The trim and tilt device according to claim 5 ,
wherein an upper end surface of the cylinder is tilted in a manner in which a diameter of the upper end surface of the cylinder is reduced as going toward the piston, and
wherein the rod guide has a contact surface that is in surface contact with the upper end surface of the cylinder over the entire periphery.

15. The trim and tilt device according to claim 7 ,
wherein an upper end surface of the cylinder is tilted in a manner in which a diameter of the upper end surface of the cylinder is reduced as going toward the piston, and
wherein the rod guide has a contact surface that is in surface contact with the upper end surface of the cylinder over the entire periphery.

16. The trim and tilt device according to claim 10 ,
wherein an upper end surface of the cylinder is tilted in a manner in which a diameter of the upper end surface of the cylinder is reduced as going toward the piston, and
wherein the rod guide has a contact surface that is in surface contact with the upper end surface of the cylinder over the entire periphery.

17. The trim and tilt device according to claim 8 ,
wherein an upper end surface of the cylinder is tilted in a manner in which a diameter of the upper end surface of the cylinder is reduced as going toward the piston, and
wherein the rod guide has a contact surface that is in surface contact with the upper end surface of the cylinder over the entire periphery.

18. The trim and tilt device according to claim 11 ,
wherein an upper end surface of the cylinder is tilted in a manner in which a diameter of the upper end surface of the cylinder is reduced as going toward the piston, and
wherein the rod guide has a contact surface that is in surface contact with the upper end surface of the cylinder over the entire periphery.

Assignees

• Hitachi Astemo Ltd
• Hitachi Astero Ltd

Inventors

• Tanaka Nobuaki
• Tsutsui Hayato

Classifications

• B63H20/10 Primary

  Means enabling trim or tilt, or lifting of the propulsion element when an obstruction is hit; Control of trim or tilt · CPC title

• B63H20/06

  on an intermediate support · CPC title