JPH10100997A - Remote-controlled helicopter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify handling operation including maintenance by improving the durability of bearings to support a main rotor at variable pitches. SOLUTION: A remote-controlled helicopter used to spray chemicals into air is provided with sets of bearings 38, 42 on the pitch-variable axial core of a main rotor 1. On the bearings 38, 42, a rotary seat 35 to mount the main rotor 1 at variable pitches, a fixed seat 39 to fix it to the mainbody side and loose seats 36, 40 held between the rotary seat 39 and the fixed seat 39 via the bearings 37, 41 are provided. It has a one-direction rotating member 43 mounted to rotate the loose seats 36, 40 only in one direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote-controlled helicopter used for spraying medicine in a field, for example.

[0002]

Conventionally, the angle at which the main rotor is mounted on the vertical axis is adjusted by pitch control to change the vertical lift, and the pitch of the main rotor traveling in the same direction as the flight direction is reduced. The main rotor retreating in the direction periodically changes the pitch to increase the pitch,
It is necessary to keep the vertical lift of the main rotor uniform during one rotation to maintain stability. Therefore, when a thrust bearing is provided on a pitch changing axis of the main rotor and the main rotor is mounted so as to change the pitch via the thrust bearing, the main rotor, which is heavy and has a large bearing load, can be stably supported. By changing the pitch by changing the angle of the rotor up and down by about 2 or 3 degrees per rotation, the contact of the bearings becomes substantially the same position, lubrication by grease is not performed properly, and durability is reduced. It was scarce and required short-term maintenance.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a remote-controlled helicopter for use in aerial spraying of a medicine, comprising a plurality of sets of bearing bearings on a pitch changing axis of a main rotor, and changing the pitch of the main rotor. There are a rotating seat that can be freely mounted, a fixed seat that is fixed to the machine side, and an idle seat that is held between the rotating seat and the fixed seat via a bearing.
Along with providing the bearing with a one-way rotating member that rotates the idler seat only in one direction,
The rotation seat is rotated forward and reverse by the pitch change of the main rotor performed every one rotation, so that the idler seat whose rotation direction is regulated by the one-way rotating member rotates in one direction, and the contact position of the bearing is changed. As a result, lubrication with grease is appropriately performed, durability of the bearing is improved, and handling operations such as maintenance work can be easily simplified.

[0004]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view of a main rotor mounting portion,
FIG. 2 is an explanatory side view of the whole, in which a main rotor (1) and a stabilizer (2) are provided above a helicopter body (3), and a leg (4) is fixed below the body (3). Further, a tail rotor (6) is provided at the rear end of the tail boom (5) on the rear side of the fuselage (3), and the spraying agent tank (7) is fixed below the fuselage (3), and the unmanned flight is performed by remote control. Fertilizers or chemicals are sprayed in the air.

Further, an engine (9) and a transmission case (10) are mounted inside the body (3) via a main frame (8), and a muffler (11) and a fuel tank (12) are arranged. The engine (9) is started by a manual operation of pulling a lever, the main rotor (1) and the tail rotor (6) are driven by the engine (9), and a radio control transmitter (not shown) is operated by the operator at hand. It is configured to fly. In FIG. 2, reference numeral (13) denotes a helicopter control receiver, and (14) denotes a monitor light.

Further, as shown in FIG. 3, FIG. 4 and FIG. 5, struts (15) (15) made of leaf springs for attaching the leg (4).
And receiving frame (16) at the connection between main frame (8)
(17) is bolted and fixed, and the front receiving frame (16)
The control frame (18) is fixed to the control frame (1).
8) Attach the left and right control pumps (19) and (19) on the lower surface side and connect the front and rear parts of the spraying agent tank (7) to the front and rear receiving frames (16) and (17). In addition, openable and closable caps (20) and (20) are provided symmetrically at the left and right charging ports of the spraying agent tank (7).

Further, a square tubular base frame (21) is fixed to the front receiving frame (16), and the base frame (2) is fixed.
The arm substrate (22) is rotatably connected to the arm substrate (1) via a fulcrum shaft, and the arm substrate (2) is connected to the arm substrate (2) via a long hole and a set screw.
2) The angle of the atomizer is freely changed and the base end of the round pipe type atomizer arm (23) is fixed to the arm substrate (22), and the angle of the atomizer (24) for spraying the liquid agent is freely changeable at the tip of the atomizer arm (23). It is attached via a retaining bolt.

Further, a spraying position where the atomizer arm (23) is laid down so as to lower the tip and extends to the side of the body (3), and the atomizer arm (23) is raised substantially vertically to form the body ( 3) With the storage position to be extended upward,
The position of the atomizer (24) is changed, and the atomizer arm (23) is compactly folded to transport and store the helicopter.
3) The tip side is lower than the base side, and the center of gravity of the left and right atomizers (24) and (24) is lower than the base frame (21), which is the mounting portion of the base of the atomizer arm (23). (23) The atomizer arm (23) is attached to the left and right atomizers (24) and (24) in the form of a torsion through the (23), and the atomizer arm (23) is compared with the conventional structure in which the distal end side of the atomizer arm (23) is higher than the base end side. The structure is such that a reinforcing member for lifting the arm is not required, and the load on the attaching portion of the atomizer arm (23) can be reduced to prevent breakage.

Further, as shown in FIGS. 4 and 5, two sets of left and right locking plates (25) and (25) are provided substantially perpendicular to the lower surface of the main frame (8) between the front and rear supports (15) and (15). And a hole (27) for inserting a round pipe-shaped carrying rod (26) is formed in the locking plate (25), and the left and right ridges (the outer diameter of which is smaller than the inner diameter of the hole (27)) are formed. 28)
(28) is formed on the carrying rod (26), and the left and right ridges (2) are formed.
8) The length of the carrying rod (26) between (28) is slightly larger than the mounting interval of the left and right locking plates (25) and (25), and the holes (27) of the left and right locking plates (25) and (25) are ) (27) The carrying rod (26) is inserted from one side, and two or more workers on both sides of the helicopter are used to carry the carrying rod (26).
(26) The helicopter is lifted by grasping both ends, and is locked with the ridge (28) on the outer upper edge of the locking plate (25) so that the helicopter can be loaded / unloaded on the truck bed or carried. In addition, about 2
A helicopter approximately 50 kilograms in size is required to load 0 kilograms of drug, but by holding the front and rear carrying rods (26) (26) by two or four workers, the drug can be loaded. Even a helicopter that has been loaded can easily load and unload to a high truck bed. Further, the carrying bar (26) is formed to be longer than the left and right width of the truck bed, so that the end of the carrying bar (26) can be placed on the shoulder of the operator and lifted. Further, instead of the ridge (28), the carrying rod (26) may be detachably fixed to the main frame (8) by a pin or the like.

Further, as shown in FIGS. 1 and 2, a vertical shaft (29) is projected from the upper surface of the helicopter body (3), and a hub plate (30) is attached to the vertical shaft (29). ) Supports the hub grip (31), and the main rotor (1) is bolted to the hub grip (31).
The pitch change shaft (33) is formed integrally with the hub grip (31), and the bolt (34) is fixed to the pitch change shaft (33) with the bolt (34). A bearing (38) is sandwiched between the bearings (37) to form a set of bearings (38), and a fixed seat (39) and an idle seat (40) are fixed to the hub plate (30).
A pair of bearings (42) is formed by sandwiching a bearing (41) between them.

Further, each of the free bearings (36) (40) of the two sets of the thrust bearing type bearing bearings (38) (42).
The main rotor is rotated by a pitch arm which is brought into contact with the side surface, rotatably supports the hub grip (31) on the hub plate (30) via the bearings (38) and (42), and is connected to the hub grip (31). (1) Periodically change the pitch for each rotation of (1), decrease the pitch of the main rotor (1), which advances in the flight direction and the relative speed increases, and retreats in the opposite direction to decrease the relative speed ( The pitch of 1) is increased, the vertical lift during one rotation of the main rotor (1) is made uniform and stable, and the ratchet (4)
3) is rotatably supported by the fixed seat (39), and gears (44) and (44) are formed on the outer periphery of each of the idler seats (36) and (40), and the gears (44) and (44) are formed. The ratchet (4
3) is engaged so that it can be freely disengaged.
6) The (40) is rotated, and the reverse rotation of the free seats (36) and (40) is prevented by the ratchet (43).

For example, when the main rotor (1) is
When the rotating seat (35) is rotated twice by the pitch change to rotate by one degree and the free seats (36) and (40) are rotated by one degree in the same direction, the main rotor (1) returns twice upward. The rotation seat (35) also reverses twice, but the free rotation seats (36) and (40) do not rotate due to the regulation of the ratchet (43). Therefore, the pitch change of the main rotor (1) is performed 360 times. Free seat (36) (4
0) makes one revolution and the bearing (3
7) It is configured such that the uneven wear of (41) is prevented.

As is apparent from the above description, a remote-controlled helicopter used for aerial spraying of a medicine is provided with a plurality of sets of bearings (38) and (42) on a pitch changing axis of a main rotor (1). A rotating seat (35) for attaching the rotor (1) so that the pitch can be freely changed, a fixed seat (39) for fixing the rotor (1) to the machine side, a rotating seat (35) and a fixed seat (3).
The bearings (38) and (42) are provided with idler seats (36) and (40) which are held between the bearings (37) and (41) between the bearings (37) and (41), and the idler seats (36) are provided.
A ratchet (43), which is a one-way rotating member for rotating the (40) only in one direction, is attached, and the pitch of the main rotor (1) is changed every rotation so that the rotary seat (3) is rotated.
The forward and reverse rotation of 5) causes the free rotation seats (36) and (40) whose rotation direction is regulated by the ratchet (43) to rotate only in one direction, and shifts the contact positions of the bearings (37) and (41). Change the lubrication with grease properly,
The durability of the bearings (37) and (41) is improved so that handling operations such as maintenance work can be simplified.

Each of the bearings (38) (4)
2) The free rolling seats (44) and (44) can be integrally formed by a single bearing seat plate, and the ratchet (43) can be attached to the hub plate (30).

[0015]

As is apparent from the above embodiments, the present invention relates to a remote-controlled helicopter used for spraying a medicine in the air, etc., in which a plurality of sets of bearings (38) are provided on a pitch-change axis of the main rotor (1). (42) and a rotary seat (3) for attaching the main rotor (1) so that the pitch can be changed.
5), a fixed seat (39) to be fixed to the machine side, and a bearing (37) between the rotating seat (35) and the fixed seat (39).
A free seat (36) (40) pinched via (41)
Are provided on the bearings (38) and (42), and a one-way rotating member (43) for rotating the idler seats (36) and (40) only in one direction is attached. When the pitch of the main rotor (1) is changed, the rotary seat (35) rotates forward or backward, so that the free rotation seats (36) (40) whose rotation direction is regulated by the one-way rotating member (43) are moved in one direction. And the bearings (3
7) Since the contact position of (41) is changed, lubrication with grease is appropriately performed, and the durability of the bearings (37) and (41) is improved to easily simplify handling operations such as maintenance work. Can be done.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a main rotor mounting portion.

FIG. 2 is an overall side view.

FIG. 3 is an explanatory front view of the same.

FIG. 4 is a side view of a medicine tank unit.

FIG. 5 is an explanatory view of carrying rod mounting.

[Explanation of symbols]

 (1) Main rotor (35) Rotating seat (36) (40) Idle seat (37) (41) Bearing (38) (42) Bearing bearing (39) Fixed seat (43) Ratchet (one-way rotating member)

Claims (1)

[Claims] 1. A remote-controlled helicopter used for aerial spraying of a medicine, comprising: a plurality of sets of bearing bearings on a pitch changing shaft of a main rotor; The bearing bearing is provided with a fixed seat to be fixed to the bearing, and a floating seat to be held between the rotating seat and the fixed seat via a bearing.
A remote-controlled helicopter, comprising a one-way rotating member for rotating the free-rotating seat only in one direction.