HYDRAULIC ACTUATOR SYSTEM

• US 20120181383A1
• Filed: 01/12/2012
• Published: 07/19/2012
• Est. Priority Date: 01/18/2011
• Status: Abandoned Application

• Current Assignee: Nabtesco Corporation
• Original Assignee: Nabtesco Corporation
• Inventors: Suzuki, Kazuyuki, Itoh, Koji
• Application Number:
  US13/349,017
• Publication Number:
  US 20120181383A1
• Time in Patent Office: Days
• US Class Current: 244/99.5
• CPC Class Codes: B64C 13/341 having duplication or stand-by provisions
• CPC Class Codes: B64C 13/505 having duplication or stand-by provisions
• CPC Class Codes: B64C 9/02 Mounting or supporting thereof

Abstract

A hydraulic actuator system 1 is provided for driving a movable portion attached to a wing 5 of an airplane. A plurality of first system hydraulic actuators 2 and a plurality of second system hydraulic actuators 3 are included and are connected to the movable portion. The first system hydraulic actuators 2 are attached to the wing 5 and connected to a first hydraulic pressure source, whereas the second system hydraulic actuators 3 are attached to the wing to be in parallel to the first system hydraulic actuators 2 and are connected to a second hydraulic pressure source. The first system hydraulic actuators 2 and the second system hydraulic actuators 3 are alternately provided at a predetermined part of the wing 5.

Claims

1. A hydraulic actuator system for driving a movable portion attached to an wing of an airplane, comprising:

a plurality of first hydraulic actuators and a plurality of second hydraulic actuators, which are connected to the movable portion,

the first hydraulic actuators being attached to the wing and connected to a first hydraulic pressure source,

the second hydraulic actuators being attached to the wing to be in parallel to the first hydraulic actuators and being connected to a second hydraulic pressure source, and

the first hydraulic actuators and the second hydraulic actuators being provided in a mixed manner at a predetermined part of the wing.

2. The hydraulic actuator system according to claim 1, wherein,

the first hydraulic actuators and the second hydraulic actuators are alternately provided.

3. The hydraulic actuator system according to claim 1, wherein,

each of the first hydraulic actuators and second hydraulic actuators includes:

a cylinder which is attached to the wing;

a sealing component which seals an opening of the cylinder;

a piston which is provided in the cylinder;

a pin which is attached to the piston; and

a piston rod which is provided at a hollow part of the piston and swings about the pin as the pin penetrates an end portion of the piston rod.

4. The hydraulic actuator system according to claim 3, wherein,

the piston includes:

a closed-bottom piston main body which is attached to the pin and has an outer circumference sliding on an inner wall of the cylinder; and

a cylindrical rod housing portion which extends from the piston main body and has an outer circumference sliding on an inner wall of the sealing component, and

a cylinder chamber defined by the cylinder and the sealing component is divided into two oil chambers by the piston main body and the rod housing portion.