JPH01254191A - Radio-driven two-wheeled vehicle body - Google Patents

Abstract

PURPOSE:To smoothly and stably execute cornering by pivotally supporting the front-wheel supporting body to the steering part and freely inclining the front wheel supporting body against the pivotal axis of the pivotally supporting part in the right and left directions of the proceeding direction. CONSTITUTION:A battery housing part 14 is fit to the lower part of a vehicle body with being slidable. While this battery housing part 14 is slided in the right and left directions to the proceeding direction by radio driving, the weight of a battery is utilized and the vehicle body is steered with being inclined right and left. To a steering part 50 to be fit to the vehicle body, a front wheel supporting body 40 is centrally attached so that a steering angle can be free. Further, the front wheel supporting body 40 is freely inclined in the right and left directions of the proceeding direction to a central shaft X of a steering bracket bearing part 50a. As a result, the cornering can be executed smoothly and stably.

Description

[Detailed Description of the Invention] Industrial Field of Application] The present invention relates to a radio-controlled two-wheeled toy that enables smooth and stable cornering.

[Prior Art] So-called radio-controlled two-wheeled vehicles have been considered difficult to commercialize because they are less stable and have more complicated steering mechanisms than four-wheeled vehicles.

Conventionally, as a steering mechanism for radio-controlled motorcycles, the
As disclosed in No. 24078, a weight attached to the top of the vehicle body is moved left and right by remote control, and the steering section of the front wheel is rotated left and right as the weight is displaced. There are known devices equipped with a mechanism for causing this.

In addition, as in Japanese Patent Application Laid-Open No. 57-84076, a drum-shaped frame body equipped with a servo mechanism and a battery is installed vertically at the bottom of the car body so as to be able to swing left and right, and the dragon-shaped frame body can be displaced in the left-right direction by remote control operation. There is also a known mechanism that uses a servo mechanism and the weight of a battery to tilt the vehicle body left and right to steer the vehicle.

Furthermore, as proposed in Japanese Patent Application Laid-Open No. 55-156799, a servo mechanism is connected to the steering section of the front wheels, and the steering section is directly rotated from side to side by remote control operation, forcing the vehicle body to bank. There are also known devices that allow this.

[Problems to be solved by the invention] The vehicle proposed in Utility Model Application Publication No. 52-24078 has a weight located at the top of the vehicle body, so it is unstable, has poor steering performance, and has difficulty negotiating sharp curves. When driving, you can expect to fall. For this reason, it is necessary to attach a stand to the bottom of the vehicle body to prevent it from falling, or to provide a mechanism to actively rotate the steering section in the left and right directions according to the displacement of the weight.
The problem is that it is mechanically complex and looks unsightly.

On the other hand, the device proposed in No. 57-64076 has a center of gravity at the bottom of the vehicle body, and therefore has superior stability and steering performance compared to the above-mentioned devices. According to this device, there is no problem when traveling on a gentle curve, but in order to travel on a steep curve, it is necessary to swing the gondola-shaped frame, which is the center of gravity, significantly in the left-right direction. However, if this is done, there is a limit to the space within a certain body frame, so it is difficult to design a single mechanism for something with limited width, such as a motorcycle. If the width of the car body is increased and the swing arc of the dragon-shaped frame is increased, the swing of the servo crank will need to be increased, and the servo will not swing smoothly due to insufficient power. Also, when swinging the swinging dragon-like frame back in the opposite direction, it takes time because the swing arc is large.
There is a problem with the inability to change direction quickly.

Furthermore, as in Utility Model Application No. 55-156799, there is a mechanism in which the steering section is directly rotated by a servo mechanism for steering.
Due to the characteristics of two-wheeled vehicles, there is a problem that they lack stability. In other words, since a two-wheeled vehicle is driven by its rear wheels, there is an inertia that always tries to drive the vehicle in a straight line, and if you try to steer it with only the front wheels, it is inevitable that the vehicle will become unbalanced. For this reason, it is necessary to keep the steering wheel operations to a minimum.

The present invention aims to solve these problems and provides a radio-controlled two-wheeled vehicle that can be steered smoothly and stably even on sharp curves.

[Means for Solving the Problems] As shown in FIG. 2 corresponding to the embodiment, the present invention has a battery case 14 swingably attached to the bottom of the vehicle body, and the battery case 14 can be operated by radio control. The system uses the weight of the stored battery to tilt the vehicle left and right and steer the vehicle while swinging it left and right with respect to the direction of travel. In addition, as shown in FIGS. 6 and 7, a steering bracket 50 attached to the vehicle body
The front fork 40 supporting the front wheel 1 is connected to the upper and lower brackets 42 and 43 by a connecting pin 53.

Furthermore, as shown in FIG. 8, the diameter of the inner hole 50b of the bearing part 50a of the steering bracket becomes larger toward the lower end, and the connecting pin 53 is connected to the pivot axis X of the steering bracket bearing part 50a. It can be tilted left and right.

[Operation] When the two-wheeled vehicle is to be curved, the battery case 14 is displaced to the left or right by radio control. As a result, the vehicle body tilts in the direction in which the battery case 14 is displaced due to the weight of the steering bracket. At the same time, the connecting bin 53 tilts in the same direction as the vehicle body with respect to the pivot X at the bearing portion 50a of the steering bracket, and the front fork 40 and Only the front wheel l supported by this tilts further than the vehicle body. This results in a sharp steering angle, making it possible to take sharp turns with stability.

Note that when the battery case 14 is displaced in the opposite direction, the bearing portion 50a instantly moves in the opposite direction, and the vehicle body changes direction smoothly.

[Example] Hereinafter, an example of unoccurred IJI will be described based on the attached drawings.

FIG. 1 is an overall view of a motorcycle toy to which the present invention is applied, where l is a front wheel, 2 is a rear wheel, 3 is a front cowl, and 4 is a front wheel.
is the rear cowl, 5 is the tank, and 6 is the battery cover.

FIG. 2 is a schematic cross-sectional view of the vehicle with accessories such as the front cowl 3, rear cowl 4, tank 5, battery cover 6, and throttle removed, and 10 is a box-shaped vehicle body frame.

The vehicle body frame 10 includes an electronic circuit housing section 1'1 containing a receiving circuit, control circuits for various motors, etc., a servo mechanism 12. A rear wheel drive mechanism 13 is housed in each. Further, a battery case 14 is attached to the bottom of the vehicle body frame 10 so as to be swingable in the left and right directions with respect to the traveling direction.

A swing arm 15 supports the rear wheel 2, and as shown in FIG. 3, its front end is connected to the vehicle body frame 10.
The swing arm 15 is pivotally connected to the gearbox portion 10a of the vehicle body through a pin 17, and the swing arm 15 can move up and down around the pin 17 within a range of a notch 18 in the vehicle body frame. Further, the rear wheel 2 is pivotally connected to the rear end of the swing arm 15 by a pin 19. Furthermore, as shown in FIG. 2, the spring 16 is connected to a receiving part 22 provided on the upper part of the swing arm 15 and a receiving part 21 provided on the rear projecting surface 20 of the vehicle body frame 10. An elastic force is applied to the vertical movement of the swing arm 15.

A drive mechanism for the rear wheels 2 is housed in the gearbox portion 10a. 25 is a motor, and this motor 25
An intermediate gear 27 is rotated by a driving gear 26 fixed to a shaft of the intermediate gear 27, and a driven gear 28 is rotated via this intermediate gear 26. A pulley 28a is coaxially fixed to this driven gear 28, and the pulley 28 and the rear wheel pivot pin 1
The rotation of the driven gear 27 is transmitted to the rear wheel 2 by a belt 29 passed between pulleys 30 fixed to the rear wheels 9.

FIG. 4 is a perspective view of the battery case 14, which is composed of a case body 30 and front and rear support arms 31 and 32. Battery locks 33 and 34 are attached to the front surface of the case body 30 so as to be able to pivot in left and right directions, and a battery holding projection 35 is formed on the rear surface. After storing the battery 36 (see FIGS. 2 and 11) inside the case body, the lock 3
Turn 3 and 34 inward to lock the battery 33.3
4 and a presser protrusion 35 to support it from the bottom.

Such a battery case 14 is suspended by a bottle 37 on the wall surface of the servo mechanism housing portion 10b of the vehicle body frame IO. The bin 37, as shown in FIG.
It passes through both the front and rear walls of the battery case support arms 31 and 32 and the servo mechanism storage fob, and this bin 3
The case 14 is swingable fl in the left and right directions with the fulcrum 7 as the fulcrum.

A servo mechanism 12 is fixed to the servo mechanism housing portion 10b of the vehicle body frame IO.

Although not shown in one drawing, the servo mechanism 12 houses a small motor and a reduction gear therein, and rotates the crank 12a in the left and right directions in the traveling direction in response to signals from the transmitter. Projection 1 of this crank 12a
2b is the rear support arm 32 of the battery case 14;
By rotating the crank 12a in the left-right direction, the battery case 14 also swings in the left-right direction.

40 is a front fork that supports the front wheel l;
As shown in the figure, it is composed of left and right outer tubes 41, upper and lower brackets 42 and 43, and a shaft 44 that connects these outer tubes and the brackets.

A front wheel 1 is pivotally attached to the lower end of the outer tube 41 by a pin 45. Further, a spring 46 is inserted into the outer tube 40, and the spring 46 is inserted into the outer tube 40.
The lower part of the shaft 44 is inserted through the shaft 6.

At the top of this outer tube 41 is a presser plate 47.
is fixed with a screw, and presses down a part of the striker 44a provided in the middle of the shaft 44 from above. With this configuration, the outer tube 46 that pivotally supports the front wheel 1 can elastically move up and down with respect to the shaft 44.

The upper part of the shaft 44 is inserted into the connecting tube 43a of the lower bracket 43, and the upper bracket 42 is attached to the upper end of the connecting tube 43a. This upper bracket 42 and the upper end of the shaft 44 are connected by screws 51, and the upper and lower brackets 42, 43,
Shaft 44. The outer tube 41 is integrated.

Such a front fork 40 is shown in FIGS. 7 and 8.
As shown in the figure, it is connected to a steering bracket 50 attached to the front end of the vehicle body. That is, a boss 43b is formed at the tip of the lower bracket 43, and the lower end of the connecting pin 53 is inserted and fixed into the boss 43b. A bearing portion 50a formed at the tip of the steering bracket 50 is inserted into the connecting pin 53 so as to serve as a turning mark, and a small diameter portion of the upper end of the connecting pin 53 is inserted into the hole 42a of the upper bracket 42. It is something that

Although not shown, a handle is connected to the upper bracket 42.

As shown in FIG. 8, the inner hole 50b of the bearing portion 50a of the steering bracket 50 becomes larger in diameter toward the bottom, and the cross-sectional shape of the inner hole 50b is oriented in the left-right direction as shown in FIG. It is a long hole with a long diameter. Also, between the bearing part 50a and the upper and lower brackets 42 and 43,
gives a slight sense of realism. Therefore, the connecting pin 53 can be tilted left and right with respect to the pivot X of the bracket bearing portion 50a. Since this connecting pin 53 is fixed between the upper and lower brackets 42 and 43, #
The front fork 40 that supports the wheels is also pivotally supported so as to be tiltable in the left-right direction with respect to the pivot axis X of the steering bracket bearing portion 50a.

The inclination angle of the connecting pin 53 with respect to the bearing portion 50a is:
Although not limited thereto, it is preferable that the inner hole 50b has a cross-sectional shape of 4@ to 6''.The cross-sectional shape of the inner hole 50b may be any shape as long as the connecting pin 53 can be tilted freely as described above.

The front fork 40 is attached to the steering bracket 5
A pair of stoppers 55 are protruded from the rear edge of the lower bracket 43 so as to sandwich the steering bracket 50, as shown in FIG. When the steering bracket 50 rotates, the side surface of the steering bracket 50 comes into contact with this stopper 50. For this reason, the front fork is 40
The rotation range of the is restricted to a small range. In the case of steering a two-wheeled vehicle, this largely depends on the movement of the center of gravity in the left-right direction, and when the front wheel l is turned significantly in the left-right direction,
This is because the vehicle loses its balance.

The steering bracket 50 described above is attached to the vehicle body frame 10 so as to protrude from the front surface of the vehicle body frame 10.

As shown in FIG. 2, the rear part of this bracket 50 is connected to a pin 60 in the bracket housing portion 10c of the vehicle body frame IO.
The rear end of the bracket and the vehicle body frame lO
A spring 62 is hooked onto a receiving portion 61 that protrudes from. As a result, the steering bracket 50 can be mounted within the notch 19 formed on the front surface of the vehicle body frame IO.
It is elastically movable up and down about the bin 60.

Next, the present invention will be explained in detail.

First, the battery 36 is housed in the battery case 14, and a power switch (not shown) is turned on. When driving the AutoPi straight, move the battery case 14 to the 11th
Suspend it vertically as shown in the figure. When turning the motorcycle to the right, the servo mechanism 12
When the crank 12a is rotated to the right, the battery case 14 is displaced to the right in the traveling direction, as shown in FIG. As a result, the center of gravity of the vehicle moves to the right, and the vehicle leans to the right as shown in FIG. At the same time, the front fork 40 and the steering bracket 50
The connecting pin 53 that connects the front fork 40 and the front wheel l pivoted thereto is tilted to the right with respect to the pivot axis X of the steering bracket bearing portion 50a, and the front fork 40 and the front wheel l pivoted thereto are tilted further to the right. As a result, the vehicle body turns in accordance with the tilting angle of the front wheels 1, drawing a sharp curve and turning to the right.

Furthermore, when turning the two-wheeled vehicle to the left, as shown in Fig. 13, when the servo crank 12a is turned to the left, the battery storage section 14 is also displaced to the left, and the center of gravity of the vehicle body moves to the left. As shown, the vehicle body leans to the left, and at the same time, the connecting link pin 53 also leans to the left with respect to the pivot axis X, and the front fork 40 and the front wheel l supported by it further lean to the left. Therefore, the two-wheeled vehicle draws a sharp curve and turns to the left based on the same principle as described above.

When the two-wheeled vehicle turns, the front fork 40 naturally rotates in the left-right direction about the steering bracket bearing 50a, but the rotation is restricted to a small range by the stoppers 55 and 55.

The angle of inclination of the coupling pin 53 with respect to the pivot axis X of the steering bracket bearing portion 50a has a correlation with the traveling speed of the two-wheeled vehicle and the rocking angle of the battery case 14.

That is, when the traveling speed is high and the swing angle of the case 14 is small, the connecting link bin 53 hardly tilts.
When turning a sharp curve by increasing the swing angle of the connecting bin 53, the tilting angle of the connecting bin 53 also increases.

[Effects of the Invention] According to the present invention as described above, the front fork 40 supporting the front wheel l is rotatably pivoted to the bearing portion 50a of the steering bracket 50, and at the same time Since it is freely tiltable in the left and right directions with respect to the axis Become. As a result, the circular motion is smaller than when the vehicle body is simply tilted, making it possible to turn sharp curves smoothly.

Further, according to the present invention, since the swing arc of the battery case, which is the center of gravity, is small, the time required to return to the opposite direction of the swing is shortened, and the direction change of the vehicle body can be performed smoothly and quickly. Moreover, the swing of the crank of the servo mechanism can be reduced and a large amount of power is not required, so an existing servo mechanism can be used.

Further, according to the present invention, since the vehicle body only needs to be tilted slightly, the running stability is also good, and the effect is particularly significant when the vehicle is driven at low speed and turns around a sharp curve.

[Brief explanation of the drawing]

Fig. 1 is an external view of the two-wheeled vehicle according to the present invention, Fig. 2 is a partial cross-sectional schematic diagram with the cowl etc. removed, and Fig. 3 is a partial cross-sectional view to explain the mounting state of the rear wheel and the drive mechanism. Schematic diagram, FIG. 4 is a perspective view of the battery case, FIG. 5 is a partial cross-sectional schematic diagram for explaining the installation state of the battery case, and FIG. 6 is a half-sectional view for explaining the structure of the front fork. Figure 7 is an assembly diagram of the upper and lower brackets of the front fork, Figure 8 is a sectional view showing the state of connection between the steering bracket bearing and the front fork, Figure 9 is a plan view of the lower end of the steering bracket bearing, and Figure 1
The figure is a schematic diagram for explaining the rotating state of the front fork, and Figures 11, 12, and 13 are for explaining the rocking state of the battery case. FIG. 14 is a schematic diagram of the vehicle body tilted to the right, and FIG. 15 is a schematic diagram of the vehicle body tilted to the right. In the figure, ■ is the front wheel, 12 is the servo a mechanism, 14 is the battery case, 40 is the front fork, 50 is the steering bracket, 50a is the steering bracket bearing part,
50b is an inner hole, 53 is a connecting bottle, and X is a pivot of a bearing portion. Patent Applicant: Green Co., Ltd. Agent Patent Attorney Shigeru Nishino 3 Misaki 4 Fig. 1M7 Fig. 10 Fig. 8 Fig. 5″29 Fig. 11 Fig. 12 Fig. 13 Fig. 15 Fig. 14

Claims (1)

[Claims] The battery compartment is swingably attached to the bottom of the vehicle body, and the battery compartment is controlled by radio to swing left and right with respect to the direction of travel, and the weight of the battery is used to tilt the vehicle left and right for steering. In a steerable two-wheeled toy, a front wheel support is pivotally attached to a steering section attached to a vehicle body so that the steering angle can be freely adjusted, and the front wheel support is pivoted in the left and right directions in the traveling direction with respect to the pivot of the pivot section. A radio-controlled two-wheeled toy characterized by being able to tilt freely.