JP5857327B2 - Propulsion and direction change device in radio controlled boat - Google Patents

Description

  The present invention relates to a propulsion and direction changing device in a so-called radio-controlled boat that carries a toy and various observation devices and moves on the water by remote control.

  Conventional radio-controlled boats use a single propulsion screw and a rudder to propel and change direction, so thrust is small, and the direction change by the rudder has a lot of energy loss, especially at low speeds where the turning radius is large. At the same time, if the rudder is turned sharply at high speeds, yawing will work and there is a risk of capsize.

  For this reason, in the case of toys, the enjoyment is halved, and in the case of a boat for mounting observation equipment, the point cannot be reached quickly, or obstacles such as rocks cannot be avoided due to the lack of a small turn. There are things to do.

  Therefore, there is also a method that eliminates the rudder and changes direction by changing the direction of the screw, but in this method, the direction of the screw (outdrive device) is opposite to the turning direction. Since it is controlled, there is a problem that the apparatus becomes complicated and the remote operation becomes complicated.

  Patent Document 1 (Japanese Patent Laid-Open No. 2003-327196) discloses a counter-rotating propeller having a three-blade front propeller and a four-blade and having a rear propeller whose diameter is about 10% smaller than that of the front propeller. Equipped with two propellers rotating in the opposite direction while generating propulsive force in the same axial direction, and recovering the energy of the rotating flow generated by the front propeller with the rear propeller, the propulsive force efficiently As a result, the distance traveled by each rotation of the blades of the front and rear propellers can be changed, and the load of each blade can be distributed to each other, further increasing the propulsive force obtained by the front propeller by the rear propeller. Even if it is accelerated and the drive mechanism of a small and narrow propeller is greatly affected by the viscosity of the fluid, the maximum propulsive force can be obtained, and the front propeller has three blades. By increasing the number of rear propeller blades as compared to the front propeller, such as four rear propellers, precessions such as thrust reduction and foaming can be suppressed due to turbulent flow, and the thrust of each blade can be efficiently extracted. An outdrive device for model boats that can be used is introduced.

  However, in the case of this outdrive device, the drive systems of the two propellers are the same, so they are always driven together. Therefore, thrust control or direction change by changing only one drive or rotation speed to each other. Since the control cannot be performed arbitrarily and the propeller is below the waterline of the hull, that is, the entire propeller is located in the water, it is particularly difficult to make a small turn and protrude downward from the bottom of the ship. When used in rivers, lakes, dam lakes, etc., there is a problem that there is a high probability of hitting rocks and obstacles and entanglement of aquatic plants.

  An object of the present invention is to solve the above-described problems in a propulsion and direction change device for a radio controlled boat. Specifically, the present invention is as follows.

1. To improve thrust and turning power by applying lift and drag to the hull in a radio controlled boat.

2. Providing the hull with efficient screw rotation energy during propulsion to enable high-speed propulsion and reduce drive energy to extend battery life.

3. There is no risk of capsizing even if you make a quick turn at high speed.

4). Enable quick turns and small turns even at low speeds.

5. The thrust generated by the screw is efficiently transmitted to the hull while suppressing the wave-making phenomenon caused by the rotation of the propulsion screw.

5. The position of the screw should be set so that the screw does not hit the obstacle in the water or the algae or the like are not easily entangled with the screw.

In order to solve the above-mentioned problem, the invention described in claim 1 is a propulsion and direction change device in a radio controlled boat, and the screw for propulsion and direction change is set so that the rotation direction and the angle of the blade are opposite directions. Consisting of a front and rear propulsion screw and a front and rear propulsion screw.
The screw blades of the front and rear propulsion screws are respectively attached to drum-like outer rotating shafts that rotate about the same axis, and an internal gear is formed on the inner peripheral surface of each outer rotating shaft. about,
Drive gears are meshed with the internal gears in the outer rotation shafts of the front and rear propulsion screws, and the rotation of the drive gears is controlled by separate drive sources,
The front and rear propulsion screws have at least part of the upper half exposed on the water;
A controller for controlling the rotation of the front and rear propulsion screws by remote control of the respective drive sources is provided.

  According to the present invention, the front and rear stage propulsion screws are mounted on the coaxial line, and the front and rear stage screws rotate in the opposite directions at the same time, so that thrust is increased, high speed travel is possible, and the front and rear stage propulsion screws are rotated. By controlling, the speed can be controlled arbitrarily.

  In addition, since the upper half of the front and rear propulsion screws are located above the waterline of the hull, the screw blades exert a force in the diagonal direction with respect to the advancing direction by the action of the vector along with the thrust. Thus, the direction can be smoothly changed.

  In addition, since some of the blades of the screw are exposed on the water, the amount of protrusion of the screw blade that protrudes downward from the bottom of the ship is reduced, thereby reducing the chance of hitting obstacles such as rocks. The worry of tangling algae etc. is reduced.

  Next, according to a second aspect of the present invention, in the first aspect of the invention, an inner rotary shaft having an internal gear provided on the inner peripheral surface is inserted into the center of the outer rotary shaft of the front and rear propulsion screws. In addition, auxiliary screw blades that are inclined in the same direction as the propulsion screw blades of the front and rear propulsion screws are attached between the outer peripheral surface of the inner rotary shaft and the inner peripheral surface of the outer rotary shaft, respectively. When the inner rotating shaft rotates at the source, the outer rotating shaft rotates together with this, and the thrust generated by the rotation of the auxiliary screw blades is added to the thrust generated by the rotation of the propulsion screw blades, and the propulsion and direction change performance of the boat It is characterized by comprising so that it may improve.

  According to the present invention, the straight flow performance is improved by the water flow flowing in the outer rotating shaft, and the thrust can be increased by the rotation of the auxiliary screw blade.

  Next, according to a third aspect of the present invention, in the first or second aspect of the present invention, a rectifying plate is arranged in parallel at the rear end opening of the outer rotary shaft of the rear stage propulsion screw, and the auxiliary screw blade is provided by the rectifying plate. A rectifier for preventing a drop in thrust is attached by rectifying a spiral turbulent flow generated by the rotation of the vortex and letting it flow out from the rear end opening.

  According to the present invention, since the flow of water flowing out from the outer rotating shaft is straightened, a vortex is not generated near the stern and the thrust is not reduced.

  Next, the invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the front and rear propulsion screw blades are coated with a flexible material. It is what.

  According to this invention, there is no worry of damaging a fingertip or the like with a screw, and it can be provided as a safe toy.

  Next, the invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the radio controlled boat is mounted as a toy or with an underwater camera or an exploration device, or an organism or plant from the water. Or it is used as a water movement means at the time of observing a building with a camera or observation equipment.

  According to the present invention, it can be widely used for observing the topography of the seabed, collecting samples from the bottom, etc., and can be used to safely conduct ecological surveys of organisms and animals in dangerous places with manned boats.

  Next, the invention described in claim 6 is characterized in that, in the invention described in claim 5, the radio control boat is equipped with a GPS function.

  According to the present invention, it is possible to accurately guide the boat to a predetermined position, or to know the sample collection or the observation point by the camera on the map.

  As described above, when propulsion and direction change of a radio controlled boat, the present invention can efficiently transmit the thrust of the screw to the hull, and can turn around without turning the speed. Can do.

  As a result, the interest associated with the improvement of the performance of the radio controlled boat as a toy increases, and in various types of observation equipment mounting boats, it is possible to quickly reach the observation point or avoid danger.

(A) is a perspective view which shows the whole radio controlled boat which concerns on this invention, (B) is explanatory drawing of a remote control machine. The side view of the state which floated the radio controlled boat which concerns on this invention on the water. Explanatory drawing of the propulsion and direction change apparatus of the radio controlled boat which concerns on this invention. The exploded perspective view of a propulsion and direction change device.

  The present invention can be applied to a radio controlled boat as a toy or a radio controlled boat for mounting various observation devices.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.

  1 is a hull of a radio controlled boat, 1a is a propulsion and direction changing device, 2 and 3 are power motors for propulsion, and these motors 2 and 3 are each driven by a battery 16 as a power source. 4 is a gear case, in which the rotation of the pinion gears 2a and 3a, the motors 2 and 3 is independent for the right turn and the left turn and the pinion gears 2a, 3a, the first gears 5, 5a, The second gears 6 and 6a are accommodated, and the rotation is transmitted to the drive gears 8 and 8a via the drive shafts 7 and 7a. Reference numeral 9 denotes a front outer rotating shaft of the front screw 11 formed in a drum shape (hollow), and propulsion screw blades 11a are provided radially on the outer peripheral surface.

  Reference numeral 10 denotes a drum-like rear outer rotary shaft of the rear propulsion screw 12 set at the same position as the front outer rotary shaft 9 at the rear part of the front propulsion screw 11 and has the same diameter as the front outer rotary shaft 9 and has an outer periphery. On the surface, rear-stage propulsion screw blades 12a are radially provided in the opposite direction to the front-stage screw blades 11a.

  9b is a hollow front inner rotary shaft formed coaxially in the center of the front outer rotary shaft 9, and an internal gear 9a is formed on the inner peripheral surface of the front inner rotary shaft 9b. An auxiliary screw blade 9d that is inclined in the same direction as the propulsion screw blade 11a is integrally formed between the surface and the inner peripheral surface 9c of the front outer rotating shaft 9.

  10b is a hollow rear-stage inner rotary shaft that is coaxially formed at the center of the rear-stage propulsion screw 12, and an internal gear 10a is formed on the inner peripheral surface of the rear-stage inner rotary shaft 10b. An auxiliary screw blade 10d that is inclined in the same direction as the propulsion screw blade 12a is integrally formed between the inner peripheral surfaces 10c of the rear outer rotating shaft 10.

  Reference numeral 13 denotes a rectifier in which a bowl-shaped rectifying plate 13b is formed in a ring 13a having the same diameter as the outer rotary shaft 10 of the rear stage propulsion screw 12. The rectifier 13 is fixed to the hull 1 side and does not rotate. .

  In this embodiment, the rectifier 13 is not indispensable in terms of its configuration, and the presence of the rectifier 13 can suppress the generation of vortex and increase the thrust.

  As for the front stage and rear stage propulsion screws 11 and 12 described above, a part of the upper half of the waterline a (see FIG. 2) of the hull 1 is located on the water, and part of the propulsion screw blades 11a and 12a is exposed on the water. doing. This exposure amount is preferably in the range of ½ to ６ of the diameter of the front and rear propulsion screws 11 and 12, and when this range is exceeded, the thrust and the turning force are significantly reduced.

  Reference numeral 14 denotes a controller for the motors 2 and 3, which receives a signal transmitted from the remote controller 17 on the ground or mother ship via the antenna 18 via the antenna 15, and rotates the motors 2 and 3. Control.

  Next, a description will be given of an operation example. When moving forward, the motor 2 controls the front stage propulsion screw 11 to the right and the rear stage propulsion screw 12 to the left.

  When changing the direction to the left, the rotation of the rear-stage propulsion screw 12 is stopped, the front-stage propulsion screw 11 is controlled to the right, the rotation of the front-stage propulsion screw 11 changing the direction to the right is stopped, and the rear-stage propulsion screw 12 is controlled to rotate left.

  The turning speed and turning radius are controlled by adjusting the rotational speeds of the propulsion screws 11 and 12 in addition to the above control.

  Remote control is performed by transmitting a control signal from the transmission antenna 18 of the remote control device 17 to the reception antenna 15.

  In the above embodiment, the size and pitch of the auxiliary screw blades 9d and 10d are set to be the same, but may be changed depending on the size, application and performance design of the boat.

  The surface of the propulsion screw blades 11a and 12a may be configured so as to prevent the finger or the like from being scratched by covering, for example, a resin material having flexibility for safety.

  In addition, when the boat 1 is used for mounting various observation equipment, by adding a GPS function, the boat can be accurately moved to a target location based on position information (map information) from the GPS. It can be guided or automatically navigated, and the observation point can be recorded, especially when the observation point is far away, in the shadow of a rock, or in a point hidden behind a tree, etc. By inputting point information into the controller 14 in advance, the boat can be automatically guided to the observation point without remote control (claim 6).

DESCRIPTION OF SYMBOLS 1 Hull 1a Gear case 2 Motor 3 Motor 2a and 3a Pinion gear 5 and 5a 1st gear 6 and 6a 2nd gear 7 and 7a Drive shaft 8 and 8a Drive gear 9 and 10 Outer rotating shaft 9a and 10a Internal gear
9b and 10b Inner rotary shafts 9c and 10c Inner circumferential surfaces 9d and 10d Auxiliary screw blades 11 Front-stage propulsion screw 12 Rear-stage propulsion screws 11a and 12a Propulsion screw vanes 13 Rectifier 13a Ring 13b Rectifier plate 14 Controller 15 18 Transmitting antenna

Claims (6)

A propulsion and direction changing device for a radio controlled boat, the propulsion and direction changing screw having a two-stage configuration including a front stage propulsion screw and a rear stage propulsion screw in which the rotation direction and the blade angle are opposite to each other. ,
The screw blades of the front and rear propulsion screws are respectively attached to drum-like outer rotating shafts that rotate about the same axis, and an internal gear is formed on the inner peripheral surface of each outer rotating shaft. about,
Drive gears are meshed with the internal gears in the outer rotation shafts of the front and rear propulsion screws, and the rotation of the drive gears is controlled by separate drive sources,
The front and rear propulsion screws have at least part of the upper half exposed on the water;
A controller for controlling the rotation of the front and rear propulsion screws by remote control of the respective drive sources;
A propulsion and direction change device for a radio controlled boat characterized by the above.   In the first aspect of the present invention, an inner rotary shaft having an inner gear provided on the inner peripheral surface is inserted into the center of the outer rotary shaft of the front and rear propulsion screws. Auxiliary screw blades that are inclined in the same direction as the propulsion screw blades of the front and rear propulsion screws are attached between the inner peripheral surfaces of the rotation shafts. The outer rotating shaft rotates, and the thrust generated by the rotation of the auxiliary screw blades is added to the thrust generated by the rotation of the propulsion screw blades to improve the propulsion and direction change performance of the boat. The propulsion and direction change device in the radio controlled boat.   In the first or second aspect of the present invention, a rectifying plate is arranged in parallel at the rear end opening of the outer rotary shaft of the rear stage propulsion screw, and the turbulent turbulence generated by the rotation of the auxiliary screw blade is rectified by the rectifying plate. Then, a propulsion and direction change device in a radio controlled boat, wherein a rectifier for preventing a drop in thrust is attached by flowing out from the rear end opening.   4. The propulsion and direction changing device in the radio controlled boat according to claim 1, wherein the surface of the front and rear propulsion screw blades is coated with a flexible material. 5.   In the invention according to any one of claims 1 to 4, when the radio controlled boat is mounted as a toy or with an underwater camera or an exploration device, or when observing an organism, a plant, or a building from the water with a camera or an observation device. A propulsion and direction changing device for a radio controlled boat, characterized in that it is used as a water moving means. 6. The propulsion and direction changing device for a radio controlled boat according to claim 5, wherein the radio controlled boat is equipped with a GPS function.

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