JP2518469Y2 - Radio controlled car - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a radio controlled car.

[0002]

2. Description of the Related Art Conventionally, as a radio controlled car, for example, a driving wheel fixed to one end of a drive shaft is provided with a driving wheel of a motor capable of rotating in a forward and reverse direction and a clutch provided at the other end of the drive shaft. It is transmitted to the driving wheels, and when driving straight, both driving wheels are driven in the forward direction by connecting the clutch, and when turning, only one driving wheel is driven in the reverse direction by disengaging the clutch and the other driving wheel is free. It is known that the

[0003]

[Problems to be Solved by the Invention] By the way, in such a conventional radio controlled car, there are two types of straight traveling and turn traveling.
A drive source for driving the drive wheels and a drive source for connecting the clutch are required to perform the different types of traveling patterns, and two control signals and control circuits are required accordingly. I was there.

It is an object of the present invention to provide a radio controlled car capable of straight traveling and turn traveling by a single drive source.

[0005]

In order to achieve the above object, the invention of claim 1 is a radio controlled car equipped with a motor which is normally and reversely rotated by a control signal from the outside, and an input which is normally and reversely rotated by the motor. While driving the gear and the drive wheel, the pair of output gears arranged on both sides of the input gear are placed, and the input gear is moved in accordance with the forward and reverse rotations of the motor, so that the input gear is not rotated during normal rotation of the motor. Is equipped with a moving member that meshes with the output gear of (1) and meshes with the other output gear during reverse rotation, and a steering mechanism that is operated by the moving member in conjunction with the movement of the input gear.

In this case, the input gear has a sun gear to which the forward and reverse rotational forces of the motor are input, and a planet gear that meshes with the sun gear and meshes with the output gear, and the moving member includes the sun gear and the planet gear. It is preferable to have a carrier that is coupled and rotates with the sun gear.

Further, in this case, it is preferable that the planetary gear is composed of a pair of gears arranged around the sun gear.

According to a fourth aspect of the present invention, in a radio controlled car equipped with a motor that is normally and reversely rotated by a control signal from the outside, an input gear that is normally and reversely rotated by the motor and an output gear that drives the drive wheel are provided. When the motor rotates forward and backward, the input gear is moved so that the input gear meshes with one side of the output gear during forward rotation of the motor and moves with the other side of the output gear during reverse rotation. And a steering mechanism that is operated by a member in conjunction with the movement of the input gear.

[0009]

According to the structure of claim 1, the moving member causes the input gear to mesh with one of the output gears during normal rotation of the motor,
During reverse rotation, it meshes with the other output gear. On the other hand, both output gears are arranged on both sides of the input gear. For this reason,
Both output gears are always rotated in the same direction regardless of the forward and reverse rotation of the input gear, and the drive wheels are driven in the same rotation direction. At the same time, since the steering mechanism is operated by the moving member in conjunction with the movement of the input gear, the steering mechanism can be steered in any two directions between the forward rotation and the reverse rotation of the motor. .

In this case, if the input gear and the moving member are constituted by a differential gear train consisting of a sun gear, a planetary gear and a carrier, and the carrier is rotated together with the sun gear, a simple structure is obtained. The input gear can be automatically meshed with one output gear and the other output gear by the forward rotation and the reverse rotation of the motor. Further, in this case, if the planetary gear is composed of a pair of gears arranged around the sun gear, one planetary gear meshes with one output gear and the other planetary gear meshes with the other output gear. And the rotation angle of the carrier required for the above meshing can be reduced by the arrangement angle of both planetary gears.

According to the structure of the fourth aspect, the moving member causes the input gear to mesh with one side of the output gear during forward rotation of the motor and mesh with the other side of the output gear during reverse rotation. Therefore, both output gears are always rotated in the same direction regardless of the forward and reverse rotations of the input gear, and the drive wheels are driven in the same rotation direction. Further, since the steering mechanism is operated by the moving member in association with the movement of the input gear, the steering mechanism can be steered in any two directions between the forward rotation and the reverse rotation of the motor.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a radio controlled car according to an embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows the appearance of a radio controlled car. The radio controlled car 1 comprises a controller 2 for transmitting a digital control signal and an automobile 3 for receiving the digital control signal and traveling in accordance with the digital control signal. Has been done. On the surface of the controller 2, the forward button S1, which also serves as a charging button, the turn button S2, the charging lamp LED5, the transmission lamp LE.
D6 is provided, the female charging jack 4 is provided on the side surface, and the transmitting antenna ANT is provided at the tip.
On the other hand, a receiving antenna 5 is provided at the center of the upper surface of the automobile 3, and a male charging device connected to the female charging jack 4 is provided below the chassis 6 of the automobile 3, as shown in FIG. A jack 7 and a power switch 8 are attached.

In the radio controlled car 1, the power switch 8 on the lower side of the chassis 6 of the automobile 3 is turned off,
As shown in FIG. 3, the straight charging button S of the controller 2 is connected to the male charging jack 7 of the automobile 3 while lightly pressing the female charging jack 4 of the controller 2 side.
By pressing 1, the battery (not shown) mounted on the automobile 3 is charged. When the charging of the battery is completed in this way, the power switch 8 below the chassis 6 of the automobile 3 is turned on. In this state, if the straight-ahead button S1 of the controller 2 is pressed, the automobile 3 runs straight,
When the turn button S2 is pressed, the car 3 turns right. Further, when the motor of the vehicle 3 is stopped by the switch S3 of the controller 2 during the straight traveling of the vehicle 3, the vehicle 3 turns left while coasting.

Next, the structure of the radio controlled car 1 will be described in detail. The circuit configuration of the controller 2 will be described first, and then the mechanical structure of the vehicle 3 will be described.

FIG. 8 shows an internal circuit diagram of the controller 2. The circuit of the controller 2 is composed of a transmission circuit and a charging circuit. Of these, the transmission circuit will be described first.

Q2, Q3, R6, R4, R5, R1, R
2, C8 and C7 form an astable multivibrator. That is, pressing switch S2 produces a square wave pulse having an oscillation frequency determined by R6, R4 and C7 and R6, R5 and C8. Also, the switch S1
Pressing produces a square wave pulse with an oscillation frequency determined by R4 and C7 and R5 and C8. here,
The collector of Q3 is connected to the emitter of Q1 via R8. Then, Q1, C1, C2, and L2 constitute a modified Hartley oscillator, and Q is generated by switching by this oscillator and the output of the multivibrator.
A predetermined signal is output from 1.

C3, C4, L connected to the output side of Q1
Reference numeral 1 constitutes an antenna matching circuit for matching the antennas ANT and Q1. That is, this circuit serves to cancel the imaginary component (reactance) of the impedances of the antennas ANT and Q1 and effectively send the output of Q1 to the antenna ANT. In addition, C5
Is a bypass capacitor, and R9 and C5 form a decoupling circuit. Further, in this transmission circuit, when any one of the forward button S1 and the turn button S2 is pressed, the transmission lamp D6 indicating that the transmission is in progress is turned on.

Next, the charging circuit will be described. In this charging circuit, when either the forward button S1 or the turn button S2 is pressed, the voltage (+ 6V) is differentiated by R15 and C6, and the pulse voltage is applied to the base of Q4 via D4 to instantly turn on Q4. . This causes a current to flow through the emitter and base of Q5 and R11, so that Q5 is turned on. The collector current of this Q5 is R
At the same time when it flows into the time constant circuit composed of 13, R12 and C9, the emitter of Q5, the correntor of Q5, R13 and C
9, R12, Q4 base, Q4 emitter Q
4 base current. Then, the collector current of Q4 forms a current loop that flows for a time determined by the time constant circuit. At the same time, the emitter current of Q5 flows into the base of Q6 via R14. This turns on Q6. Therefore, the battery connected to the charging jack 4 of the controller 2 via the charging jack 7 of the automobile 3 is rapidly charged for the time based on the time constant. Even when the transmission switches S1 and S2 are not pressed, the battery is trickle-charged through R17.

Then, when the time of the time constant elapses, C
9 is almost fully charged, and the base current of Q4 stops flowing, so Q4 is turned off. At the same time, the base current of Q5 stops flowing, and the emitter current of Q5 also stops flowing.

Next, the discharge of C9 is started. That is, discharge is performed through the paths of C9 (+), R13, R16, D3, C9 (-), C9 (+), R14, Q6 (base), Q6 (emitter), D3, C9 (-). . The battery is charged during the charging time and discharging time of C9. The charging lamp D6 is turned on only during the charging time of C9.

Next, the internal structure of the automobile 3 will be described with reference to FIG. The automobile 3 includes a chassis 6, a body 9 mounted on the chassis 6, and a partition plate 10 interposed between the chassis 6 and the body 9. Various mechanisms for driving the automobile 3 are incorporated between the partition plate 10 and the chassis 6. The chassis 6 includes a pair of front wheels 11a and 11b and a rear wheel (driving wheel) 12 in front and rear.
a and 12b are rotatably attached to the rear wheel 12
a and 12b are motors 13 provided at the rear of the chassis 6.
Rotate forward and backward by. The motor 13 is driven by a battery (for example, a nickel-cadmium battery) 14 provided in the center of the chassis 6 as a power source, and a receiver 15 provided adjacent to the battery 14 controls forward and reverse rotation. That is, the receiver 15 receives the digital control signal from the controller 2 and causes the motor 13 to rotate normally or reversely according to the digital control signal.

The driving force of the motor 13 is transmitted through the differential gear train 17 meshing with the shaft gear 16 of the motor 13 to the rear axle 1.
8 is transmitted to the rear axle 12 and the rear axles 12a, 12
b. The rear axle 18 has a pair of output gears 19
The differential gear train 17 is engaged with the output gear 19a on the right side in the traveling direction when the motor 13 rotates in the forward direction, and meshes with the output gear 19b on the left side in the traveling direction when the motor 13 rotates in the reverse direction. (Details will be described later).

On the other hand, both front wheels 11a, 11b are attached to the steering mechanism 21 via their respective front axles 20a, 20b. The steering mechanism 21 includes two front wheels 11a and 11b.
And a pair of left and right knuckle arms 22a and 22b rotatably attached to each of the knuckle arms 22a and 22b.
A tie rod 23 that connects 22b and a steering arm 24 that has a front end engaged with the tie rod 23 and a rear end engaged with the differential gear train 17 are provided. The steering arm 24 is swingably attached to a boss-shaped support shaft 25 provided in a projecting manner in the middle portion of the chassis 6, and is swingable right and left by the differential gear train 17. This swinging is performed between a straight-ahead position where the steering arm 24 extends straight and directs the front wheels 20a, 20b forward, and a turn position where the steering arm 24 leans left and directs the front wheels 20a, 20b to the right.

On the other hand, the tie rod 23 has a protrusion 2 at the front.
6 is formed, and a spring 28 is stretched between the protruding portion 26 and a boss 27 formed on the front portion of the chassis 6. The tie rod 23 is constantly urged to the right in the traveling direction by the spring 28, and the steering arm 24
The left turn position is maintained and the right turn position is restored to the straight-ahead position by the biasing force of the spring 28.

Next, the relationship between the differential gear train 17 and the steering mechanism 21 will be described with reference to FIGS. 5 shows a straight traveling state of the automobile 3, and FIG. 6 shows a turn (right turn) traveling state of the automobile 3. Differential gear train 1
7 is a sun gear 29 rotatably supported on the chassis 6.
And a pair of planetary gears 30a, 3 that mesh with the sun gear 29.
0b, and a carrier 31 that connects the sun gear 29 and the planetary gears 30a and 30b. Sun gear 29
Is composed of a large gear 32 composed of a face gear and a small gear 33 fixed to the lower part thereof. Motor 13
The shaft gear 16 of is engaged with the large gear 32, and the rotational force of the motor 13 is input to the large gear 32 and transmitted from the small gear 33 to both planetary gears 30a and 30b.

The two planetary gears 30a and 30b are rotatably supported by a carrier 31 in a state of being brought close to each other. When the vehicle 3 travels forward, the planetary gear 30a on the right side in the traveling direction rotates counterclockwise. Of the planetary gear 3 on the left side in the traveling direction during the turn traveling.
0b rotates clockwise and meshes with the left output gear 19b. And this rotation is the sun gear 2
This is performed by a triangular carrier 31 which is rotatably attached to the shaft 9 and rotates together with the sun gear 29. That is, when the sun gear 29 is rotated clockwise by the motor 13, the carrier 31 is also rotated clockwise to mesh the right planetary gear 30a with the right output gear 19a,
When the sun gear 29 is rotated counterclockwise, the carrier 3
1 also rotates counterclockwise to mesh the left planetary gear 30b with the left output gear 19b. Due to the selective meshing of the planetary gears 30a and 30b with the output gears 19a and 19b, as shown in FIG.
When 3 is reverse rotation, both rear wheels 12a, 12b are driven in the forward direction, and as shown in FIG. 6, both rear wheels 12a, 12b are driven in the forward direction even when the motor 13 is normally rotated. To be done. In addition, each planetary gear 30a, 30b and each output gear 1
The chassis 6 is provided with a pair of stoppers 34, 34 also serving as a pressing member for the motor 13 in order to regulate the meshing position with the 9a, 19b. The carrier 31 rotates together with the sun gear 29, but at the meshing position between the planetary gears 30a and 30b and the output gears 19a and 19b, the side surfaces thereof come into contact with the stoppers 34 and 34, and the rotation thereof is restricted. It has become.

On the other hand, as shown in FIG. 7, the carrier 31 has a cam 3 located coaxially with the sun gear 29 on the back side thereof.
It is configured to have 5. This cam 35 is a carrier 3
It has a short cam projection 35a and a long cam projection 35b, which are fixed to No. 1 and extend outward from the center. The long and short cam projections 35a and 35b are engaged with the rear end of the steering arm 24 to steer the vehicle 3.
That is, when the carrier 31 is rotated in the clockwise direction, the cam 35 is rotated accordingly, and the short cam protrusion 35a swings the steering arm 24 to the straight-ahead position and is rotated counterclockwise. The long cam protrusion 35b swings the steering arm 24 to the turn position. Therefore, as shown in FIG. 5, when the motor 13 rotates in the reverse direction, the steering arm 24 is steered to the straight traveling position, and as shown in FIG. 6, when the motor 13 rotates in the normal direction, the steering arm 24 turns. Steer to position. Further, when the switch S3 is pressed during straight traveling to stop the motor 13, the rear end of the steering arm 24 is engaged with the portion between the long and short cam projections 35a and 35b by the urging force of the spring 28. Since the moving radius of this portion is smaller than that of both the long and short cam projections 35a, 35b, the steering arm 24 is swung to the left turn position.

Here, a series of movements of traveling and steering of the automobile 3 will be described step by step. When the forward button S1 of the controller 2 is pressed, the motor 13 of the automobile 3 rotates in the reverse direction.
By this rotation, the sun gear 29 is rotated in the clockwise direction, and the carrier 31 rotates the right planetary gear 30a to the meshing position on the right side thereof, so that the rear wheels 12a and 12b are connected via the right output gear 19a. It is rotated in the forward direction. At the same time, the rotation of the carrier 31 causes the cam 35 to move to the steering arm 2.
4 is swung to a straight ahead position, and both front wheels 11a and 11b are directed to the front. As a result, the automobile 3 runs straight. Next, when the turn button S2 of the controller 2 is pressed, the motor 13 of the automobile 3 rotates forward. Due to this rotation, the sun gear 29 rotates counterclockwise, and the carrier 31 rotates the left planetary gear 30b to the meshing position on its left side, and the rear wheels 12a, 12 via the left output gear 19b.
b is rotated in the forward direction. And this is cam 35
Swings the steering arm 24 to the turn position, and the front wheels 11
Point a and 11b diagonally. As a result, the automobile 3 turns.

As described above, according to this embodiment, the differential gear train 17 is used in the driving portion of the automobile 3, and the differential gear train 17 is used.
By rotating the sun gear 29 and the carrier 31 together, the vehicle 3 can always be moved forward even if the motor 13 rotates in the forward and reverse directions. At the same time, the movement of the carrier 31 steers the vehicle 3. Therefore, the vehicle 3 can be caused to perform two traveling patterns of straight traveling and turn traveling. Moreover, the control signal in this case can be a one-system control signal for rotating the motor 13 in the forward and reverse directions.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the rotation of the motor 13 is transmitted via the intermediate gear 40 to the rotary shaft 4 that constitutes a moving member.
1 is transmitted to the input gear 42 from the rotating shaft 41. A spiral groove 41a is formed on the peripheral surface of the rotary shaft 41, and the input gear 42 is attached to the rotary shaft 41 so as to engage with the spiral groove 41a. That is,
Although not shown, an engagement protrusion is formed on the inner peripheral surface of the input gear 42, and the engagement protrusion is formed in the spiral groove 41 a of the rotary shaft 41.
Is engaged with. Therefore, when the rotating shaft 41 is rotated in the direction of the arrow (clockwise direction) shown in the drawing, the input gear 42 is rotated clockwise and is moved to the rear side of the rotating shaft 41 by the thrust force based on this rotating force. It Conversely, the rotating shaft 4
When 1 is rotated counterclockwise, the input gear 42 is rotated counterclockwise and moved to the front side.

The input gear 42 meshes with the output gear 43. When the input gear 42 is moved to the front, it meshes with one side (front side) of the output gear 43.
When it is moved to the rear part, it meshes with the other side (rear side) of the output gear 43. Therefore, the input gear 42 rotates in the opposite direction when it moves forward and when it moves backward, but the meshing position with the output gear 43 also reverses, so the output gear 43 is always rotated in one direction. It Both rear wheels 12a, 12 are passed through a gear train 44 composed of a gear fixed to the output gear 43 and a gear fixed to the rear axle 18.
b is rotated in the forward direction.

On the other hand, a grooved wheel 45 is fixed to the input gear 42, and the grooved wheel 45 is moved in the front-rear direction together with the input gear 42. A moving claw 46 configured to be movable back and forth is engaged with the grooved wheel 45 at its tip end portion, while the other end of the moving claw 46 is engaged with the steering arm 24. In this engaged state, the moving claw 46
Pin 46a is loosely inserted into the long hole 47 of the steering arm 24, and the movement of the moving claw 46 moves the pin 46a in the long groove 47 in the front-back direction. The long groove 47 is formed to be slightly inclined with respect to the longitudinal direction of the steering arm 24, and the steering arm 24 is swung about its support shaft 25 by the movement of the moving claw 46. That is, the forward / reverse rotation of the motor 13 causes the moving claw 46 to move together with the input gear 42 between the front portion and the rear portion of the rotating shaft 41, and the front wheels 11 a and 11 b move straight and turn via the steering arm 24. Steered between. Therefore, the vehicle 3 travels straight and turns by the forward and reverse rotations of the motor 13.

Thus, according to this embodiment, the input gear 4
2 has a structure to be attached to the rotating shaft 41 in which the spiral groove 41a is formed, the meshing position of the input gear 42 with the output gear 43 can be automatically reversed depending on the rotation direction of the input gear 42. Therefore, the output gear 43 can be rotated in the same manner regardless of the forward or reverse rotation of the input gear 42. At the same time, the forward and reverse rotations of the rotating shaft 41 enable steering straight and turn, so that the vehicle 3 can have two traveling patterns, that is, straight traveling and turn traveling.

[0035]

As described above, according to the invention of claim 1,
The input gear can be selectively meshed with both output gears as the motor rotates forward and backward, and the steering mechanism can be operated.Therefore, the steering wheel can be set freely between the forward rotation and the reverse rotation of the motor. The steering wheel can be steered in two directions, and the drive wheels can always be driven in the same rotation direction. Therefore, by simply switching the motor between the forward rotation and the reverse rotation by the control signal of one system, for example, a traveling pattern such as straight traveling and right turn traveling, straight traveling and left turning traveling, or right turn traveling and left turning traveling. Can be done.

In this case, since the input gear and the moving member are constituted by the differential gear train consisting of the sun gear, the planetary gear and the carrier, the traveling and steering can be performed simultaneously with a simple structure. Further, in this case, if the planetary gear is composed of a pair of gears arranged around the sun gear, the rotation angle of the carrier can be reduced, and the steering response can be improved. .

According to the second aspect of the present invention, the input gear can be selectively meshed between one side and the other side of the output gear in accordance with the forward and reverse rotations of the motor, and at the same time, the steering mechanism. Therefore, as in the first aspect of the present invention, two kinds of traveling patterns can be performed only by switching the motor between the forward rotation and the reverse rotation by the one-system control signal. .

[Brief description of drawings]

FIG. 1 is a perspective view of the appearance of a radio controlled car according to an embodiment.

FIG. 2 is a back view of the radio-controlled model car of the embodiment.

FIG. 3 is a diagram showing a state during charging of the radio-controlled model car of the embodiment.

FIG. 4 is an exploded perspective view showing the entire structure of an automobile.

FIG. 5 is a plan view showing an operating state when the vehicle is traveling straight ahead.

FIG. 6 is a plan view showing an operating state when the vehicle is turning.

FIG. 7 is an exploded perspective view around a carrier.

FIG. 8 is a circuit diagram of a controller in a radio control car.

FIG. 9 is a plan view showing the internal structure of the main part of the second embodiment.

[Explanation of symbols]

 1 Radio Control Car 2 Controller 3 Vehicle 11 Front Wheel 12 Rear Wheel 13 Motor 17 Differential Gear Train 19 Output Gear 21 Steering Mechanism 29 Sun Gear 30 Planetary Gear 31 Carrier 41 Rotating Shaft 42 Input Gear 43 Output Gear

Claims (4)

(57) [Scope of utility model registration request] 1. A radio controlled car equipped with a motor that is normally and reversely rotated by an external control signal, wherein an input gear that is normally and reversely rotated by the motor and a drive wheel are driven, and the input gear is sandwiched between the input gear and the input gear. A pair of output gears arranged on both sides, the input gear is moved with the forward and reverse rotation of the motor, the input gear is meshed with the one output gear at the time of forward rotation of the motor, and at the time of reverse rotation. A radio controlled car, comprising: a moving member that meshes with the other output gear; and a steering mechanism that is operated by the moving member in conjunction with the movement of the input gear. 2. The input gear includes a sun gear to which the forward and reverse rotational forces of the motor are input, and a planetary gear that meshes with the sun gear and meshes with the output gear, and the moving member includes the sun gear. The radio controlled car according to claim 1, further comprising a carrier that connects a gear and the planetary gear and rotates together with the sun gear. 3. The radio controlled car according to claim 2, wherein the planetary gear is composed of a pair of gears arranged around the sun gear. 4. A radio controlled car equipped with a motor that is normally and reversely rotated by a control signal from the outside, wherein an input gear that is normally and reversely rotated by the motor, an output gear that drives a drive wheel, and a normal gear of the motor. A moving member that moves the input gear along with the reverse rotation so that the input gear meshes with one side of the output gear during normal rotation of the motor and meshes with the other side of the output gear during reverse rotation; A radio controlled car, comprising: a steering mechanism that is operated by a moving member in association with the movement of the input gear.