Trim and tilt apparatus for marine vessel propulsion machine and marine vessel propulsion machine
There are provided a bar-shaped piston rod having one end portion attached to a marine vessel propulsion machine main body; an inner cylinder; an inner piston mounted in the other end portion of the piston rod, is accommodated in the inner cylinder, and divides a space in the inner cylinder into a fourth chamber on the one end portion side and a fifth chamber on the other end portion side; an outer cylinder accommodating the inner cylinder therein; and an outer piston covering an opening portion of one end portion of the inner cylinder in a state where the piston rod is exposed, divides a space in the outer cylinder into a second chamber on one end portion side and a first chamber on the other end portion side, and is formed with a through hole that allows the fourth chamber and the second chamber to communicate with each other.
1. A trim and tilt apparatus for a marine vessel propulsion machine comprising:
a bar-shaped rod having one end portion that is attached to a marine vessel propulsion machine main body;
a first cylinder;
a first piston which is mounted in the other end portion of the rod, is accommodated in the first cylinder, and divides a space in the first cylinder into a first space on the one end portion side and a second space on the other end portion side;
a second cylinder which accommodates the first cylinder therein; and
a second piston which covers an opening portion of one end portion of the first cylinder in a state where the rod is exposed, divides a space in the second cylinder into a third space on the one end portion side and a fourth space on the other end portion side, and is formed with a communication hole that allows the first space and the third space to communicate with each other, wherein
a pressure receiving area of a region where the second piston receives a pressure of the third space is greater than a pressure receiving area of a region where the first piston receives the pressure of the third space.
2. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 1 ,
wherein a fluid in the third space is directed toward the first space via the communication hole of the second piston in a case of receiving a force in a direction in which the rod protrudes from the first cylinder.
3. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 1 ,
wherein a fluid in the third space is directed toward the first space via the communication hole of the second piston in a case of receiving a force in a direction in which the rod protrudes from the first cylinder.
4. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 1 ,
wherein the first piston includes a valve which allows the fluid in the first space to be directed toward the second space in a case of receiving the force in the direction in which the rod protrudes from the first cylinder.
5. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 1 ,
wherein the first piston includes a valve which allows the fluid in the first space to be directed toward the second space in a case of receiving the force in the direction in which the rod protrudes from the first cylinder.
6. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 2 ,
wherein the first piston includes a valve which allows the fluid in the first space to be directed toward the second space in a case of receiving the force in the direction in which the rod protrudes from the first cylinder.
7. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 3 ,
wherein the first piston includes a valve which allows the fluid in the first space to be directed toward the second space in a case of receiving the force in the direction in which the rod protrudes from the first cylinder.
8. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 4 ,
wherein a fluid in the third space opens the valve and is directed toward the second space in a case of receiving the force in a direction in which the rod protrudes from the first cylinder after the first piston comes into contact with the second piston.
9. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 5 ,
wherein a fluid in the third space opens the valve and is directed toward the second space in a case of receiving the force in a direction in which the rod protrudes from the first cylinder after the first piston comes into contact with the second piston.
10. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 6 ,
wherein a fluid in the third space opens the valve and is directed toward the second space in a case of receiving the force in a direction in which the rod protrudes from the first cylinder after the first piston comes into contact with the second piston.
11. The trim and tilt apparatus for a marine vessel propulsion machine according to claim 7 ,
wherein a fluid in the third space opens the valve and is directed toward the second space in a case of receiving the force in a direction in which the rod protrudes from the first cylinder after the first piston comes into contact with the second piston.
12. A marine vessel propulsion machine comprising:
a marine vessel propulsion machine main body which gives a propulsion force to a ship body;
a bar-shaped rod having one end portion that is attached to the marine vessel propulsion machine main body;
a first cylinder;
a first piston which is mounted in the other end portion of the rod, is accommodated in the first cylinder, and divides a space in the first cylinder into a first space on the one end portion side and a second space on the other end portion side;
a second cylinder which accommodates the first cylinder therein; and
a second piston which covers an opening portion of one end portion of the first cylinder in a state where the rod is exposed, divides a space in the second cylinder into a third space on the one end portion side and a fourth space on the other end portion side, and is formed with a communication hole that allows the first space and the third space to communicate with each other, wherein
a pressure receiving area of a region where the second piston receives a pressure of the third space is greater than a pressure receiving area of a region where the first piston receives the pressure of the third space.