JP2007029139A - Model automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an RC (Radio-Controlled) car narrowing the width of a chassis while defining the size of the chassis within the specifications and using a motor and a battery with prescribed sizes. <P>SOLUTION: This RC car 1 is provided with the narrow and long battery 22, a receiver 28 supplied with a power from the battery 22 and receiving a control signal wirelessly transmitted from a transmitter 23, a power motor amplifier 26 amplifying the control signal, a power motor 14 whose rotation is controlled by the control signal amplified by the power motor amplifier 26, the chassis 2 disposed with the aforementioned components, a pair of front wheels 4 disposed in front of the chassis 2 and driven by the power motor 14, and a pair of rear wheels 6 disposed in the rear part of the chassis 2 and driven by the power motor 14. The battery 22 is so disposed in the chassis 2 as to position the longitudinal center line of the battery 22 on the longitudinal center line A of the chassis 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radio control type model car (hereinafter referred to as an RC car), and more particularly to a layout of heavy objects such as a motor and a battery and a drive mechanism in the RC car.

As a conventional RC car, an off-road type RC car 100 will be described with reference to FIGS. FIG. 6 shows a state where the body is removed from the upper surface of the RC car 100.
In the central portion of the chassis 102, heavy objects such as a power motor 114, an elongated battery 122, a steering servo 124, a receiver 126, and a power motor amplifier 128 are disposed. When viewed from the front wheel 104, the power motor 114, the power motor amplifier 126, and the receiver 128 are arranged on the left side, and the battery 122 is arranged on the right side. Since the RC car 100 accommodates these gravitational objects in the central portion of the chassis 102, the central portion of the chassis 102 is formed to be wide and flat, as clearly shown in the rear view of FIG.

  The off-road type RC car 100 is a four-wheel drive system in order to improve traveling performance on rough roads. As shown in FIGS. 8 and 9, the rotation of the power motor 114 is performed by a motor rotation shaft 114a. Is transmitted to the first spur gear 130 by the pinion gear 114b attached to the. The rotation of the first spur gear 130 is transmitted to the rear wheel drive shaft 138 via the first bevel gear 134 and the second bevel gear 136 (rear wheel differential gear). A rear inner joint coupling 140, a rear wheel drive shaft 142, a rear outer joint coupling 144a, and a rear wheel wheel shaft 144 are attached to both ends of the rear wheel drive shaft 138, respectively.

  The rotation of the first spur gear 130 is transmitted to the front of the chassis 102 via the propeller shaft 154. A third bevel gear 156 is attached to the front end portion of the propeller shaft 154 via a propeller joint 156a, and the rotation of the third bevel gear 156 is transmitted to the front wheel drive shaft 160 via a fourth bevel gear (front wheel differential gear) 158. Communicated. A front inner joint coupling 162, a front wheel drive shaft 164, a front outer joint coupling 166a, and a front wheel wheel shaft 166 are attached to both ends of the front wheel drive shaft 160, respectively. By such a power transmission mechanism, the front wheel 104 and the rear wheel 106 are respectively rotated.

  Further, Patent Document 1 discloses a model automobile in which a double-axis motor is placed vertically at the center of a chassis and AA batteries are arranged on the left and right. Also in this model car, the central part of the chassis is formed widely and flat in order to place heavy objects such as motors and batteries.

JP 2000-350872 A

  The off-road type RC car 100 often travels on a non-leveling surface, and the chassis 102 inclines during cornering, so that the wide and flat bottom surface of the chassis (FIG. 7) contacts the convex portion of the non-leveling surface. Is more likely to do. Then, the RC car 100 jumps due to the contact between the chassis bottom surface and the ground, and there is a possibility that the running becomes unstable. In addition, since the bottom surface of the chassis is wide and flat, the bottom surface of the chassis may come into contact with the convex portion of the non-leveling surface even when the non-leveling surface travels straight.

  Even in the case of an on-road type RC car, the chassis tilts during cornering, and therefore, the wide and flat bottom of the chassis may come into contact with the running surface and the RC car may jump off.

  Therefore, in order to avoid contact between the bottom surface of the chassis and the running surface, it has been required to make the width of the chassis as thin as possible. Furthermore, a thin chassis has been demanded so that the thin chassis gives a daring impression according to user's preference, but it has not been easy to realize for the following reasons.

  As shown in FIGS. 8 and 9, if a heavy object such as a motor or a battery is disposed at the center of the chassis 102, the lateral width of the chassis 102 cannot be reduced. This is because the chassis, motor, and battery of an RC car have predetermined standards, and it is difficult to simply make the chassis longer than before or to change the shape of the battery to narrow the lateral width of the chassis.

  A first object of the present invention is to provide an RC car having a structure in which the chassis width is within the standard, and the width of the chassis can be reduced while using a motor or battery of a predetermined size.

  In addition, in RC cars, heavy objects such as batteries and motors occupy a large weight with respect to the total weight, so that the running performance is greatly affected depending on which part of the chassis they are arranged. However, as shown in FIG. 6, the conventional RC car 100 has the battery 122 on the right side and the power motor 114 and the like on the left side when viewed from the front of the chassis. It tends to be out of balance and spin easily when cornering or in contact with the convex part of the uneven ground. Therefore, an RC car having a good balance between the left and right sides of the chassis has also been demanded. Further, in the conventional RC car, as shown in FIG. 8 and FIG. 9, it is necessary to transmit the driving force of the power motor 114 from the rear wheel side to the front wheel side in order to perform four-wheel drive. Therefore, since the propeller shaft 154 is disposed so as to penetrate the center portion of the chassis 102 in the front-rear direction, the degree of freedom in placing heavy objects in the center portion of the chassis 102 is reduced.

  A second object of the present invention is to provide an RC car capable of arranging heavy objects with a good balance between left and right. Further, even in the case of four-wheel drive, the arrangement of heavy objects is limited by the propeller shaft. Is to provide RC cars that are not.

  In addition, the conventional RC car has a structure in which the power motor 114 is disposed inside the chassis 102 and is covered from above with a decorative body. Therefore, the power motor 114 is not directly exposed to the outside air and is difficult to cool. It was.

  A third object of the present invention is to provide an RC car having a structure in which a power motor can be easily cooled.

  The model automobile of the present invention solves the above-mentioned problems. The invention according to claim 1 receives a long thin battery 22 and a control signal that is fed from the battery 22 and wirelessly transmitted from the transmitter 23. And a power motor amplifier 26 for amplifying the control signal, a power motor 14 whose rotation is controlled by the control signal amplified by the power motor amplifier 26, and these components. A pair of front wheels 4 disposed at the front of the chassis 2 and driven by the power motor 14, and a pair disposed at the rear of the chassis 2 and driven by the power motor 14. In the model automobile 1 including the rear wheel 6, the front center line of the battery 22 is positioned on the center line A in the longitudinal direction of the chassis 2. A model cars, characterized by disposing the battery 22 to the chassis 2.

  According to a second aspect of the present invention, the battery 22 and the power motor 14 are connected to the chassis 2 so that the battery 22 and the power motor 14 are aligned with respect to a center line A in the longitudinal direction of the chassis. The model vehicle according to claim 1, wherein the model vehicle is disposed in the vehicle.

The invention according to claim 3 is the model automobile according to claim 1 or 2, characterized in that the power motor 14 is disposed at a rear end portion of the chassis 2.
The invention according to claim 4 is characterized in that a gear 30 for transmitting the rotation of the power motor 14 and a slipper mechanism 32 for adjusting a slip amount of the gear 30 are arranged at the rear end portion of the chassis 2. The model vehicle according to claim 3.

  The invention according to claim 5 is provided with a propeller shaft 54 that transmits the rotation of the power motor 14 to the front wheel 4, and the propeller shaft 54 is disposed to be inclined with respect to the bottom surface of the chassis 2. The model car according to claim 3 or 4. The invention according to claim 6 is the model car according to claim 5, wherein the propeller shaft 54 is disposed above the battery 22.

  The invention according to claim 7 includes a steering servo 24 that operates according to the control signal received by the receiver, and a steering 9 that steers the front wheel 4 by the steering servo 24, and the longitudinal center of the chassis 2 is provided. The battery 22 and the steering servo 24 are arranged in the chassis 2 so that the battery 22 and the steering servo 24 are in a line with respect to the line A. 7. It is a model car given in one paragraph.

  The invention according to claim 8 is characterized in that the rotating shaft 14a of the power motor 14 is arranged in parallel with the rotating shafts 60, 38 of the front wheel 4 and the rear wheel 6. It is a model car given in any 1 paragraph.

  In the invention according to claim 9, the chassis 2 includes a flat rectangular portion 2c in which the battery 22 is disposed, and a pair of protruding portions 2b that protrude obliquely upward from the rectangular portion 2c on the side surface of the chassis 2. A model car according to any one of claims 1 to 8, wherein the model car is provided. The invention according to claim 10 is the model car according to claim 9, wherein the power motor amplifier 26 and the receiver 28 are respectively disposed on the pair of protrusions 2b. The invention according to claim 11 is characterized in that the power motor amplifier 26 and the receiver 28 are arranged so as to be symmetric with respect to a center line A in the longitudinal direction of the chassis 2. It is a model car given in any 1 paragraph of thru / or 10.

The invention according to claim 12 is the model car according to claim 11, wherein the power motor amplifier 26 and the receiver 28 are arranged on the rear side of the chassis 2.
The invention according to claim 13 is the model automobile according to any one of claims 1 to 12, wherein battery holding ribs 2a for holding the battery 22 are erected on the chassis 2. The invention according to claim 14 is the model car according to claim 13, wherein the battery holding rib 2 a is formed so as to surround the periphery of the battery 22.

  The invention according to a fifteenth aspect is the model car according to any one of the first to fourteenth aspects, further comprising an upper deck 12 that connects the front and rear of the chassis 2 above the battery 22. .

  The model automobile of the present invention is configured as described above. According to the invention according to claim 1, since heavy objects such as a battery and a power motor can be arranged on the center line of the chassis, the balance between the left and right sides of the chassis Will be better. In addition, by placing the battery vertically in the center of the chassis, the width of the chassis can be reduced. As a result, the bottom surface of the chassis is less likely to come into contact with the running surface during cornering. The bottom surface of the chassis is less likely to come into contact with the convex portion of the ground, and traveling performance is improved.

  Further, according to the invention according to claim 2, since the heavy objects such as the battery and the power motor are arranged in a line, the right and left balance of the chassis is improved, and the straight running which is important when traveling on a non-leveling surface. Improves.

  According to the third aspect of the invention, in the four-wheel drive model vehicle, the power motor is disposed at the rear end of the chassis, so that not only the maintenance performance of the power motor is improved, but also during traveling. Since the power motor that generates heat and becomes high temperature can be directly cooled by outside air, the heat dissipation of the power motor is improved.

  According to the fourth aspect of the present invention, in the four-wheel drive model automobile, the slipper mechanism is arranged at the rear end portion of the chassis, so that the slipper mechanism can be easily accessed and the maintenance performance is improved. A sufficient amount of gear slippage by the mechanism can be ensured.

  According to the invention which concerns on Claim 5, the number of gears can be reduced by inclining a propeller shaft compared with the case where the said propeller shaft is arrange | positioned horizontally with respect to the bottom face of a chassis.

  According to the invention of claim 6, since the propeller shaft is disposed above the battery, the degree of freedom in arranging the battery is improved, and it is easy to balance left and right.

According to the seventh aspect of the invention, the left and right balance is improved by arranging the battery and the steering servo in a line.
According to the eighth aspect of the present invention, since the rotation shafts of the power motor, the front wheel, and the rear wheel are parallel, these rotational torques are in the same direction when jumping, and the chassis can be prevented from tilting left and right in the air. .

  According to the invention of claim 9, since the size of the flat portion of the bottom surface of the chassis can be minimized according to the battery, the bottom surface of the chassis contacts the traveling surface during cornering or off-road traveling. Probability can be reduced.

  According to the invention according to claim 10, since the power motor amplifier and the receiver are generally smaller than the battery, they can be arranged in the protruding portion without increasing the flat portion of the bottom surface of the chassis, It is possible to provide a chassis in which a power motor amplifier and a receiver are accommodated in a chassis, and at the same time, an obstacle on an uneven ground can be easily climbed.

  According to the eleventh aspect of the present invention, the power motor amplifier and the receiver can be arranged with a good balance between left and right. According to the twelfth aspect of the present invention, it is possible to reduce the lateral width of the front side of the chassis by disposing the power motor amplifier and the receiver on the rear side of the chassis.

  According to the thirteenth aspect of the present invention, the battery holding rib can securely hold the battery in the chassis while simultaneously improving the rigidity of the chassis. According to the fourteenth aspect of the invention, since the battery holding rib surrounds the battery, the battery can be held more rigidly in the chassis.

  According to the fifteenth aspect of the present invention, front and rear distortion of the chassis can be prevented by the upper deck.

  Hereinafter, an embodiment in which the model automobile of the present invention is applied to a four-wheel drive off-road type RC car will be described. Hereinafter, in the description of the present invention, “front” means the front side of the RC car where the front wheels are arranged, and “rear” means the rear side of the model vehicle where the rear wheels are arranged. This means that the center part means the part of the chassis that is sandwiched between the front side and the rear side.

  FIG. 1 is a perspective view of an RC car 1 of the present invention, showing a state in which a body (not shown) mounted on the upper surface is removed to make the structure of the chassis visible. A pair of front wheels 4 are attached to the front part of the chassis 2, and a pair of rear wheels 6 are attached to the rear part of the chassis. A pair of front dampers 8 is disposed at the front part of the chassis 2, and a pair of rear dampers 10 are disposed at the rear part of the chassis 2. One end of the front damper 8 is attached to a front damper support portion 13 provided at the front portion of the chassis 2, and the other end is attached to the front wheel support arm 5 (FIG. 2). Similarly, one end of the rear damper 10 is attached to a rear damper support portion 11 provided at the rear portion of the chassis 2, and the other end is attached to the rear wheel support arm 7 (FIG. 2).

  A battery holding rib 2a is erected at the center of the chassis 2 to hold the battery 22, and the battery 22 is surrounded and held by the battery holding rib 2a. On the upper surface side of the chassis 2, a long and thin upper deck 12 is disposed so as to connect the front side and the rear side of the chassis 2. A power motor 14 controlled by a power motor amplifier 26 is disposed at the rearmost portion of the chassis 2.

  Next, the structure of the RC car 1 of the present invention will be described in detail with reference to FIGS. 3 and 4. 3 and 4 illustrate the arrangement of heavy objects and drive mechanisms on the chassis 2 from the state of FIG. 1 from the front wheel 4, the front wheel support arm 5, the rear wheel 6, the rear wheel support arm 7, and the front wheel. The damper 8, the front damper support portion 13, the rear damper 10, the rear damper support portion 11, the upper deck 12, the front gear box, the rear gear box, and the like are removed.

  At the center of the chassis 2, the longitudinal center line of the long and thin battery 22 is arranged so as to be parallel to the longitudinal center line A of the chassis 2. As shown in FIG. 3, as viewed from above the chassis 2, the center line in the longitudinal direction of the battery 22 is disposed so as to overlap the center line A in the front-rear direction of the chassis 2. The battery 22 uses a storage battery such as nickel cadmium or nickel metal hydride, and is a long and thin plate-like body having a curved surface portion on the side surface.

  Further, a steering servo 24 for controlling the steering 9 is disposed in front of the battery 22, and a power motor amplifier 26 and a receiver 28 are disposed symmetrically with respect to the center line A on the side of the battery 22. Has been. The steering servo 24, the power motor amplifier 26, and the receiver 28 are each supplied with power from the battery 22.

  As shown in FIG. 5, the receiver 28 receives the control signal transmitted from the transmitter (propo) 23 by radio and transmits it to the power motor amplifier 26 and the steering servo 24. The power motor amplifier 26 amplifies the control signal to control the rotation of the power motor 14, and the steering servo 24 amplifies the control signal to control the steering angle of the steering 9.

  Here, returning to FIGS. 3 and 4, the rear wheel drive mechanism will be described. A pinion gear 14 b is attached to the motor rotating shaft 14 a of the power motor 14 disposed at the rearmost part of the chassis 2. The pinion gear 14 b meshes with the first spur gear 30. The first spur gear 30 is supported by a slipper mechanism 32 so as to be movable in the thrust direction. The first spur gear 30 is biased to a predetermined meshing position by a spring of the slipper mechanism 32. By adjusting the screw of the slipper mechanism 32, the slip amount of the first spur gear 30 by the slipper mechanism 32 can be adjusted. A second spur gear 34 is attached to the rotation shaft 32a of the slipper mechanism 32, and the first spur gear 30 and the second spur gear 34 rotate together.

  The second spur gear 34 meshes with the third spur gear 35, the third spur gear 35 meshes with the fourth spur gear (rear wheel differential gear) 36, and a rear rotating shaft 38 is attached to the fourth spur gear 36. ing. As the fourth spur gear 36 rotates, the left and right rear rotating shafts 38 rotate differentially. A rear inner joint coupling 40 is connected to both ends of the rear rotating shaft 38. Further, one end of a rear wheel drive shaft 42 is connected to each of the left and right rear inner joint couplings 40, and a rear wheel wheel shaft 44 is connected to the other end of the rear wheel drive shaft 42 via a rear outer joint coupling 44a. Connected. The rear wheel 6 is attached to the rear outer wheel shaft 44. Note that the rotational speed of the power motor 14 is reduced to an appropriate value by a reduction mechanism including the first spur gear 30, the second spur gear 34, the third spur gear 35, and the fourth spur gear 36.

  The operation of the rear wheel drive mechanism will be described. First, when the power motor 14 is driven by the control of the power motor amplifier 24 and the motor rotating shaft 14a rotates, the pinion gear 14b rotates. Then, the first spur gear 30 is rotated by the rotation of the pinion gear 14 b, the second spur gear 34 is rotated by the rotation of the first spur gear 30, and the third spur gear 35 is rotated by the rotation of the second spur gear 34. Further, the fourth spur gear 36 is rotated by the rotation of the third spur gear 35, and the left and right rear wheel rotation shafts 38 are differentially rotated by the rotation of the fourth spur gear 36. The rotation of the rear wheel rotation shaft 38 is transmitted to the rear wheel drive shaft 42 via the rear inner joint coupling 40, and the rotation of the rear wheel drive shaft 42 is transmitted to the rear wheel shaft 44 via the rear outer joint coupling 44a. The rear wheel 6 is rotated.

  Further, the front wheel drive mechanism will be described with reference to FIGS. A first bevel gear 50 is provided integrally with the fourth spar gear 35. A second bevel gear 52 is disposed at an angle of about 90 degrees with respect to the first bevel gear 50, and the first bevel gear 50 and the second bevel gear 52 mesh with each other. A joint coupling 52 a is attached to the second bevel gear 52. The rear end of the propeller shaft 54 is connected to the joint coupling 52a. The propeller shaft 54 is for transmitting the driving force of the power motor 14 in the direction of the front wheels, and is arranged extending from the rear side to the front side above the battery 22 at the center of the chassis 2. .

  The front end of the propeller shaft 54 is connected to a third bevel gear 56 disposed at the front portion of the chassis 2 via a joint coupling 56a. A fourth bevel gear 58 (front wheel differential gear) is disposed at an angle of about 90 degrees with respect to the third bevel gear 56, and the third bevel gear 56 and the fourth bevel gear 58 are in mesh with each other.

  The left and right front wheel rotation shafts 60 are connected to the fourth bevel gear 58 so as to be differentially movable. A front inner joint coupling 62 is disposed on the front wheel rotation shaft 60. One end of a front wheel drive shaft 64 is connected to the front inner joint coupling 62. A front wheel wheel shaft 66 is connected to the other end of the front wheel drive shaft 64 via a front outer joint coupling 66a, and the front wheel 4 is attached to the front outer wheel shaft 66.

  The propeller shaft 54 is inclined downward from the rear to the front with respect to the bottom surface of the chassis. This is because the position of the second bevel gear 52 with respect to the chassis bottom surface is higher than the position of the fourth bevel gear 58 with respect to the chassis bottom surface, and the rotation of the second bevel gear 52 is directly transmitted from the third bevel gear 56 to the fourth bevel gear 58. Therefore, the propeller shaft 54 is inclined. Thereby, when the propeller shaft 54 is disposed horizontally with respect to the chassis, a spur gear necessary for transmitting the driving force of the propeller shaft 54 downward can be omitted. As shown in FIG. 3, the propeller shaft 54 is arranged at an angle with respect to the center line A in the longitudinal direction of the chassis when viewed from above the chassis 2.

  As shown in the bottom view of FIG. 2, the bottom portion of the chassis 2 is formed with a flat and elongated rectangular portion 2c and a protruding portion 2b projecting from both sides of the rectangular portion 2c toward the outside of the chassis. As shown in FIG. 2, the protruding portion 2 b is formed so as to swell gently from the front to the rear of the chassis 2. Further, the bottom surface of the projecting portion 2 b is inclined so as to project obliquely upward from the bottom portion constituted by the rectangular portion 2 c of the chassis 2.

  In general, the off-road type RC car 1 often jumps during traveling. When jumping, since the tires (front wheels and rear wheels) are not in contact with the ground in the air, the RC car can be operated in the air (angle in the front-rear direction) using the rotational torque of the tires. The reason for operating the posture of the RC car 1 is to make the posture so that it can land stably when landing after jumping. Specifically, during the RC car 1 jump, if the accelerator is opened to accelerate the rotation of the tire, the rear wheel side is lowered and landed. On the other hand, when the accelerator is closed in the air and the rotation of the tire is decelerated, the front wheels are lowered and land.

  However, since the rotational speed of the power motor changes simultaneously with the change in the rotational speed of the tire, the rotational torque of the power motor also affects the attitude in the air. In the conventional RC car 100, as shown in FIG. 8 and FIG. 9, the rotating shaft 114a of the power motor 114 is disposed so as to be perpendicular to the tire rotating shafts 160 and 138. Since rotation torque is generated in the left-right direction of the chassis 102 by the rotation of the motor 114, if the accelerator is controlled during the jump, an effect that the posture rotates to the left and right has occurred.

  On the other hand, in the RC car 1 of the present invention, the rotating shaft 14a of the power motor 14 is arranged in parallel with the rotating shafts 60 and 38 of the front and rear tires 4 and 6, so that even if the accelerator is controlled during the jump, The rotational torque of the motor is in the same direction as the rotational torque of the tire and only changes the posture in the front-rear direction, so that the problem of rotating the chassis left and right does not occur.

  In addition, a four-wheel drive RC car is equipped with a slipper mechanism to prevent gear chipping and tire slippage. In the conventional RC car shown in FIG. 8, the slipper mechanism is mounted on the first spur gear 130 so that the slip amount can be adjusted. However, since the conventional slipper mechanism is incorporated in the propeller shaft 154 disposed at the center of the center of the chassis, it is difficult to adjust the conventional slipper mechanism. On the other hand, in the RC car 1 according to the present invention, the slipper mechanism 32 is arranged facing outward at the rear portion of the chassis 2, so that the adjustment can be easily performed.

It is a perspective view which shows the RC car of this invention. It is a bottom view of the RC car of FIG. It is a top view which shows the drive mechanism of RC car of this invention, and arrangement | positioning of a heavy article. FIG. 4 is a perspective view of the RC car of FIG. 3. It is a control block diagram of the RC car of the present invention. It is a perspective view of the conventional RC car It is a bottom view of the RC car of FIG. It is a top view which shows the drive mechanism of the conventional RC car, and arrangement | positioning of a heavy article. It is a perspective view of the RC car of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 RC car 2 Chassis 4 Front wheel 6 Rear wheel 12 Upper deck 14 Power motor 22 Battery 24 Steering servo 26 Power motor amplifier 28 Receiver 54 Propeller shaft A Center line of the longitudinal direction of a chassis and a battery

Claims (15)

A long thin battery, a receiver that receives power from the battery and that is wirelessly transmitted from a transmitter, a power motor amplifier that amplifies the control signal, and the power motor amplifier that is amplified by the power motor amplifier A power motor whose rotation is controlled by a control signal, a chassis in which these components are disposed, a pair of front wheels disposed in a front portion of the chassis and driven by the power motor, and a rear portion of the chassis In a model car comprising a pair of rear wheels that are disposed on and driven by the power motor,
A model vehicle, wherein the battery is disposed in the chassis such that a center line in a longitudinal direction of the battery is positioned on a center line in a longitudinal direction of the chassis. 2. The battery and the power motor are arranged in the chassis such that the battery and the power motor are aligned with respect to a longitudinal center line of the chassis. Model car. The model vehicle according to claim 1, wherein the power motor is disposed at a rear end portion of the chassis. 4. The model vehicle according to claim 3, wherein a gear that transmits rotation of the power motor and a slipper mechanism that adjusts a slip amount of the gear are disposed at a rear end portion of the chassis. A propeller shaft that transmits rotation of the power motor to the front wheels;
The model vehicle according to claim 3 or 4, wherein the propeller shaft is disposed to be inclined with respect to a bottom surface of the chassis. The model vehicle according to claim 5, wherein the propeller shaft is disposed above the battery. A steering servo that operates according to the control signal received by the receiver; and a steering that steers the front wheels by the steering servo;
7. The battery and the steering servo are arranged in the chassis so that the battery and the steering servo are in a line with respect to a longitudinal center line of the chassis. A model car according to one item. The model automobile according to any one of claims 1 to 7, wherein a rotation shaft of the power motor is disposed in parallel with rotation shafts of the front wheels and the rear wheels. 9. The chassis according to claim 1, further comprising: a flat rectangular portion in which the battery is disposed; and a pair of projecting portions that project obliquely upward from the rectangular portion on a side surface of the chassis. A model car according to one item. The model automobile according to claim 9, wherein the power motor amplifier and the receiver are respectively disposed on the pair of protrusions. The model automobile according to any one of claims 1 to 10, wherein the power motor amplifier and the receiver are arranged so as to be symmetrical with respect to a longitudinal center line of the chassis. . The model automobile according to claim 11, wherein the power motor amplifier and the receiver are arranged on a rear side of the chassis. The model automobile according to any one of claims 1 to 12, wherein a battery holding rib for holding the battery is erected on the chassis. The model automobile according to claim 13, wherein the battery holding rib is formed so as to surround a periphery of the battery. The model car according to any one of claims 1 to 14, further comprising an upper deck that connects the front and rear of the chassis above the battery.

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