JPH10129597A - Helicopter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the movement of a helicopter on the ground, by protruding plural wheels, provided for elevation on the front and the rear in respective skids, to the lower part than the lower surface of the skids by a jack after landing. SOLUTION: The upper part of a jack 3 and the hinge of a movable fitting base mount 2; out of the jack 3, the movable type fitting base mounts 2 of wheels 1, and the wheels 1, etc., housed in the casings 4 of skids 5; are fixed to the skids 5. When the jack 3 is extended, it is extended downward to rotate the base mount 2 around a fitting spindle, and the wheel 1 fitted to the base mount 2 is lowered to be protruded outside from the lower surface of the skids 5. The wheels 1 are housed in the skids 5 when a helicopter is flying, taking off, and landing, and the respective wheels are protruded outside of the lower surface of the skids 5 when moving on the ground; therefor the helicopter is supported by four wheels 1 to be made movable by only adding force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a helicopter equipped with a skid type landing gear.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view of a conventional helicopter equipped with a skid type landing gear. In the figure, when a conventional helicopter equipped with a skid type landing gear is moved on the ground, a jack 03 with wheels 01 for the fuselage is prepared in advance at the landing site, and the helicopter on which the jack 03 has landed is located on the left and right sides. One piece is attached to each of the fittings 02 provided slightly behind the skid 05 in the machine center of gravity. Then, by manually pulling down the handle of the attached jack 03 downward around the hinge, the wheel 01 is lowered, and the rear part of the skid 05 is raised above the ground. Then, a load is applied downward to the rear part of the fuselage by human power to lift the front part of the skid 05 from the ground, and move the skid 05 forward or backward by human power while maintaining a balance between front and rear.

[0003]

As described above, in the conventional helicopter, when the helicopter is moved on the ground, it is necessary to prepare a detachable jack 03 suitable for the aircraft in advance for each landing site. In addition, removal work before takeoff and installation work for each landing are required. Also, since the jack 03 can be attached only to a pair of left and right slightly behind the machine weight center of the left and right skids 05,
The front part of the skid 05 must be lifted by pressing the rear part of the fuselage by human power, and the front and rear balance must be balanced, which is unstable.

[0004] If wheels are mounted on the skid 05 in advance so that they can be immediately moved on the ground, the wheels must withstand the impact of landing and can be used on uneven terrain. However, it is structurally large, heavy, expensive and difficult to put into practical use.

[0005]

A helicopter according to the present invention has an object to solve the above-mentioned problem. After landing a plurality of wheels provided to be able to ascend and descend in each skid, a jack is provided from a lower surface of the skid. Are also projected downward to support the fuselage via the wheels.

Further, in the helicopter according to the present invention, after landing on a plurality of wheels provided so as to be able to ascend and descend in each skid so as to be rotatable about an axis in a vertical direction, the jack is positioned below the lower surface of the skid. It protrudes downward to support the fuselage via the wheels.

As described above, in this helicopter, the jack provided in each skid moves up and down by extending and contracting the jack in the vertical direction, and projects below the lower surface of the skid, or the lower surface of the skid. It will be in a state of being pulled inward. In a state where the wheels protrude below the lower surface of the skid, the static load of the helicopter is shared by the plurality of wheels, and the wheels become stable and independent.
The movement can be performed only by the force in the traveling direction. Also, in a state where the wheel is pulled inward from the lower surface of the skid,
Since the skid bears the weight of the helicopter and the impact load during landing, no load is applied to the wheels. Also,
Since the direction of the wheels is rotatable around the vertical axis, steering can be easily performed by applying a lateral force to the body at a location sufficiently distant from the wheels.

[0008]

1 and 2 are explanatory diagrams of a helicopter according to an embodiment of the present invention. In the figure,
The helicopter according to the present embodiment is equipped with a moving device for moving the aircraft after landing, as shown in the figure. This moving device is provided with each skid 5 of the skid type landing gear.
The symmetrical position of the center of gravity of the helicopter before and after
A housing 4 containing a wheel 1, a movable mounting base 2, a jack 3 and the like is provided at a total of four locations of the pair.
It is equipped so that it can move up and down with respect to the lower surface of the.
A pair of front and rear wheels 1 is rotatable around a vertical axis 6 so as not to hinder the steering.

As shown in FIG. 1, of the jack 3 housed in the housing 4 of the skid 5, the movable mounting base 2 for the wheels 1, the upper part of the jack 3 and the movable mounting base. The hinge of the base 2 is fixed to the skid 5.
When the jack 3 is extended, the jack 3 extends downward, the movable mounting base 2 rotates around the mounting axis, and the wheels 1 mounted on the movable mounting base 2 are lowered to the lower surface of the skid 5. From the outside. When the jack 3 contracts, the jack 3 shrinks upward, the movable mounting base 2 rotates around the hinge, and the wheels 1 mounted on the movable mounting base 2 move upward, and the inside of the skid 5 To be stored. Wheels 1 are provided at a total of four places before and after the skid 5, and are stored in the skid 5 during takeoff and landing during flight of the helicopter,
When moving on the ground, each wheel 1 is projected outside the lower surface of the skid 5 so that the helicopter is supported by the four wheels 1 so that the aircraft becomes stable and self-supporting, and only applies force in the traveling direction to move the wheels 1. It is possible to move through. The direction of the wheel 1 is rotatable forward or backward about a vertical axis 6, and steering can be performed by applying a lateral force to the body at a location sufficiently distant from the wheel 1.

As shown in FIG. 2, the movable mounting base 2 is rotated around the mounting axis by manually or electrically extending or retracting the jack 3 in the axial direction, and is mounted on the movable mounting base 2. The wheel 1 is moved up and down so as to protrude below the lower surface of the skid 5 or to be pulled up inside the lower surface of the skid 5. When the wheel 1 protrudes below the lower surface of the skid 5, the machine center of gravity is inside the quadrilateral formed by the grounding point of the wheel 1, and the static load of the helicopter is shared by at least three or more wheels out of four wheels. It becomes independent and can move only by applying human power in the direction of travel. The front or rear pair of wheels 1 is rotatable about a vertical axis 6, so that steering can be performed only by applying a lateral force to the body at a location sufficiently distant from the wheels 1. When the wheel 1 is raised, the skid 5 bears the weight of the helicopter and the impact load during landing.

In the conventional helicopter, when the helicopter is to be moved on the ground, a detachable jack suitable for the aircraft must be prepared in advance for each landing site, and also a detaching operation before takeoff and an attaching operation for each landing. is required. In addition, since only one pair of jacks can be attached to the left and right sides of the rear part of the skid slightly more than the center of gravity of the left and right skids, the front part of the skid is lifted by human power and the front part of the skid is lifted, and the front and rear balance is not balanced Must be unstable. If wheels are mounted on the skid in advance so that they can be moved immediately on the ground, the wheels must withstand the impact of landing, and they can be used on uneven terrain. Large, heavy, expensive and difficult to commercialize. In contrast,
In this helicopter, a total of four wheels 1 can be raised and lowered with respect to the lower surface of the skid 5, and a movable mounting base 2 for raising and lowering the wheels 1 with respect to the lower surface of the skid 5. A jack 3 for driving the movable mounting base 2, etc., and a pair of front or rear wheels 1 is rotatable about a vertical axis 6 in a state where the body is supported by the wheels 1. By equipping the skid 5 with such wheels 1, it is not necessary to prepare an externally detachable jack with wheels, which is conventionally required for each landing site, and to remove and attach the jack. Conventionally, only one jack is attached to each of the left and right skids at the center of gravity and slightly behind the skid. When moving the helicopter, it is necessary to balance the front and rear of the fuselage. By mounting the wheels 1 at four locations, there is no need to balance the front and rear of the aircraft, and stable movement can be performed. Also, a pair of front or rear wheels 1 is
By making the helicopter rotatable around, the direction can be easily changed when the helicopter moves. Also, wheel 1
Is lifted and lowered during standby on the ground after landing, and the impact of landing is borne by the skid 5, so that the design strength can be considerably reduced as compared with the case where the wheels are fixed to the landing gear, Lightening is possible.

[0012]

The helicopter according to the present invention is constructed as described above. By vertically extending and retracting the jack, the wheels provided in each skid move up and down to lower than the lower surface of the skid. It is in a protruding state or a state in which it is pulled inward from the lower surface of the skid.
When the wheels protrude below the lower surface of the skid, the multiple wheels share the static load of the helicopter and become stable and independent. The aircraft can be stably moved without taking any special measures.

When the wheel is lifted inward from the lower surface of the skid, the load is not applied to the wheel because the skid bears the weight of the helicopter and the impact load during landing. It can be equipped, eliminating the need to prepare and remove jacks with wheels for each landing site.

In addition, since the wheels can be turned around the vertical axis, the steering can be easily performed by applying a lateral force to the body at a place sufficiently distant from the wheels. Conversion can be done easily.

[Brief description of the drawings]

1 (a) is a front view of a helicopter according to an embodiment of the present invention, FIG. 1 (b) is a side view, FIG. 1 (c) is a bottom view of its skid, and FIG. Is a front view, and FIG.
Is a perspective view.

FIG. 2 is an explanatory diagram of the operation.

FIG. 3 (a) is a front view of a conventional helicopter, and FIG. 3 (b) is a front view of a jack with wheels thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheel 2 Wheel mounting base 3 Jack 4 Housing 5 Skid 6 Vertical axis

Claims (2)

[Claims] 1. A skid comprising: a plurality of wheels provided so as to be able to ascend and descend in each skid; and a jack for projecting the wheels below the lower surface of the skid after landing and supporting an airframe via the wheels. A helicopter, characterized in that: 2. The helicopter according to claim 1, wherein the direction of the wheel is provided so as to be rotatable around a vertical axis.