CN113144631A - Model car - Google Patents

Abstract

The invention discloses a model car. The model car includes the fixing base, the hull with turn to the device, it includes first actuating mechanism to turn to the device, first runner assembly, connecting piece and two second runner assemblies, first runner assembly and two second runner assemblies all can rotate to be connected in the fixing base, two second runner assemblies distribute in the both ends of connecting piece and all are connected with and turn to the wheel, and be connected in the connecting piece, the connecting piece is connected in the second runner assembly, first actuating mechanism can drive the connecting piece swing through first runner assembly, the connecting piece is used for driving two second runner assemblies syntropy and rotates. Because first actuating mechanism drives the connecting piece swing through first runner assembly, consequently when first actuating mechanism rotates, can drive the connecting piece swing, the second runner assembly can carry out syntropy's rotation under the swing effect of connecting piece, and turns to the wheel and connect in the second runner assembly, consequently, the model car can have compact structure when turning to.

Description

Model car

Technical Field

The invention relates to the technical field of model cars, in particular to a model car.

Background

The existing model car is limited by the size of a field, and is generally required to be compact in structure and high in control precision. The inner structure of the current model car on the market adopts independent functional modules to carry out layout, for example, steering engine, electric tuning, receiver, shock absorber, motor, battery box, reduction gear box and the like are taken as functional modules to carry out corresponding layout, so that a user can debug, replace and upgrade by himself, but the structural layout of the independent functional modules leads to the inner space of a large number of model cars among the functional modules. For example, a steering device for steering the model car is usually provided in the model car, and the conventional steering device has a complicated structure, so that the conventional model car has a less compact structure.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a compact model vehicle.

A model car according to an embodiment of the first aspect of the invention, the model car comprising:

fixing base and the device that turns to, turn to the device and include first actuating mechanism, first runner assembly, connecting piece and two second runner assemblies, first runner assembly and two the second runner assembly all can rotate connect in the fixing base, two the second runner assembly distribute in the both ends of connecting piece and all are connected with and turn to the wheel, and rotatable coupling in the connecting piece, the connecting piece can swing connect in the second runner assembly, first actuating mechanism can pass through first runner assembly drive the connecting piece swing, the connecting piece is used for driving two the second runner assembly syntropy rotates.

The model car provided by the embodiment of the invention at least has the following technical effects: the first driving mechanism drives the connecting piece to swing through the first rotating assembly, so that when the first driving mechanism rotates, the connecting piece can be driven to swing, the second rotating assembly can rotate in the same direction under the swinging action of the connecting piece, and the steering wheel is connected to the second rotating assembly, so that the model car can be steered and has a compact structure.

According to some of the embodiments of the invention, the first drive mechanism includes a first shaft, the first rotating assembly includes a first worm gear, a first gear, a second gear, and a coupling, the first gear and the second gear can be rotatably connected with the fixed seat, the first turbine is connected with the first rotating shaft, and is meshed with the first gear, the second gear is meshed with the first gear and is provided with a first connecting part, the connecting piece is provided with a first connecting hole and a second connecting hole, the second connecting hole is arranged at the two ends of the connecting piece, the first connecting hole is arranged between the two second connecting holes, the first connecting part is arranged through the first connecting hole, and the diameter is less than the aperture of first connecting hole, second rotating assembly is provided with the second connecting portion, the second connecting portion wear to locate the second connecting hole.

According to some embodiments of the present invention, the model car further comprises a driving device and a driving shaft, wherein two ends of the driving shaft are connected with driving wheels, the driving device comprises a second driving mechanism, a third gear, a fourth gear, a fifth gear and a second turbine, the driving shaft is arranged through the fifth gear, the second driving mechanism comprises a second rotating shaft, the third gear is connected to the second rotating shaft and meshed with the second turbine, the second turbine is connected to the fifth gear, and the fourth gear is connected to the second turbine and is used for driving the second turbine so that the fifth gear drives the driving shaft to rotate.

According to some embodiments of the present invention, the model car further includes a spring, the fixing base is provided with a third connecting hole, the second rotating assembly includes a third connecting portion, the third connecting portion is inserted into the third connecting hole from one end of the third connecting hole, the circuit board covers at least part of the other end of the third connecting hole, one end of the spring abuts against the second rotating assembly, and the other end abuts against the circuit board.

According to some embodiments of the invention, the model car further comprises a potentiometer, the base is provided with a first groove, the potentiometer is located in the first groove and provided with a fourth connecting hole, the potentiometer is welded to the circuit board, a first through hole is formed in the bottom of the first groove, the second gear is provided with a fourth connecting portion, and the fourth connecting portion penetrates through the first through hole and the fourth connecting hole.

According to some embodiments of the present invention, the model car further includes a circuit board, a power switch, and a switch lever, the fixing base is provided with at least one third groove, the power supply is fixedly connected to the circuit board, the model car further includes a first position-limiting portion, the first position-limiting portion is movably connected to the power switch, the switch lever is provided with a second groove and at least one second position-limiting portion, the first position-limiting portion is disposed in the second groove, the second position-limiting portion is disposed in the third groove, and the switch lever can swing around the second position-limiting portion to move the first position-limiting portion.

According to some embodiments of the present invention, the model car is provided with a charging socket, the charging socket is connected to the fixing base and located at a side end of the first driving mechanism or the second driving mechanism, one end of the charging socket is welded to the circuit board, and the other end of the charging socket penetrates through the base.

According to some embodiments of the invention, the model car further comprises a pin header, a power switch, a charging socket, a first driving mechanism and a second driving mechanism, wherein the first driving mechanism and the second driving mechanism are arranged in the middle of the fixed seat together, the power switch and the charging socket are respectively arranged on two sides of the middle of the fixed seat, and the pin header is arranged in the fixed seat in a penetrating manner, welded on the circuit board and positioned between the first rotating assembly and the power switch.

According to some embodiments of the invention, the circuit board is provided with a fourth groove, the fixing seat is recessed towards the fourth groove to form a fifth groove, and the fourth gear and the second turbine are arranged in the fifth groove.

According to some embodiments of the invention, the ratio of the sizes of the model car and the prototype car is at least 1/76.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic configuration diagram of a driving apparatus and a steering apparatus of a model car according to an embodiment of the present invention;

FIG. 2 is an exploded view of a portion of the structure of a model car according to one embodiment of the present invention;

fig. 3 is an exploded view of another part of the structure of the mold type shown in fig. 2;

FIG. 4 is a schematic view of a model car according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view at A in FIG. 4;

FIG. 6 is a schematic view of a model car according to an embodiment of the present invention;

FIG. 7 is a schematic view of a model car according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a mounting base of a model car according to an embodiment of the present invention;

fig. 9 is an exploded view of a model car according to an embodiment of the present invention.

Reference numerals:

the vehicle body 10, the circuit board 20, the fourth recess 21, the base 30, the steering wheel 40, the driving wheel 50, the battery 60, the charging socket 70, the bushing 80, the pin header 90, the fixing base 100, the first recess 110, the first through hole 111, the fifth recess 120, the third recess 130, the first fixing hole 140, the second fixing hole 150, the third connecting hole 160, the bushing mounting groove 170, the steering apparatus 200, the first driving mechanism 210, the first rotating shaft 220, the first rotating assembly 230, the first turbine 231, the first gear 232, the second gear 233, the first connecting portion 234, the connecting member 235, the first connecting hole 236, the second connecting hole 237, the fourth connecting portion 238, the second rotating assembly 240, the rotating arm 241, the second connecting portion 242, the third connecting portion 243, the first fixing shaft 244, the driving apparatus 300, the second driving mechanism 400, the second rotating shaft 401, the third gear 410, the fourth gear 420, the fifth gear 430, the second rotating shaft 242, the third connecting portion 243, the first connecting shaft 110, the first connecting portion, the second connecting portion, the fourth connecting portion, the second connecting portion, the third connecting portion, the fourth connecting portion, the third connecting portion, the fourth connecting portion, the third connecting portion, the fourth connecting portion, the second connecting portion, the third connecting portion, the fourth connecting portion, the second connecting portion, the third connecting portion, the second connecting portion, the third connecting portion, the second worm gear 440, the driving shaft 500, the potentiometer 600, the fourth connecting hole 610, the power switch 700, the first limit portion 710, the switch lever 720, the second groove 721, and the second limit portion 722.

Detailed Description

The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.

In the description of the embodiments of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "up", "down", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the embodiments of the present invention, if a feature is referred to as being "disposed", "connected", or "mounted" to another feature, it can be directly disposed, fixed, or connected to the other feature or indirectly disposed, fixed, or connected to the other feature.

According to a model car of an embodiment of the first aspect of the invention, the model car comprises:

the fixing base 100, the car shell 10, the circuit board 20, the base 30 and the steering device 200, the steering device 200 includes a first driving mechanism 210, a first rotating assembly 230, a connecting piece 235 and two second rotating assemblies 240, the first rotating assembly 230 and the two second rotating assemblies 240 are both rotatably connected to the fixing base 100, the two second rotating assemblies 240 are distributed at two ends of the connecting piece 235 and are both connected with steering wheels 40, and are rotatably connected to the connecting piece 235, the connecting piece 235 can be swingably connected to the second rotating assemblies 240, the first rotating assembly 230 is used for changing the steering of the force transmitted to the second rotating assemblies 240 by the first driving mechanism 210, so that the first driving mechanism 210 can drive the connecting piece 235 to swing through the first rotating assembly 230. The connecting member 235 is used for driving the two second rotating assemblies 240 to rotate in the same direction. The vehicle body 10 is connected to the holder 100. The circuit board 20 is connected to the holder 100 and is located between the holder 100 and the vehicle body 10. The base 30 is connected to the fixing base 100, and defines a first accommodating space (not shown) together with the fixing base 100, and the steering device 200 is disposed in the first accommodating space.

Specifically, referring to fig. 1, the first driving mechanism 210 may be a motor, a solenoid, or the like, and includes a first rotating shaft 220, and the first rotating shaft 220 is rotatable to provide a force for steering the steered wheels 40. The first rotating assembly 230 includes a first turbine 231, a first gear 232, and a second gear 233. The first gear 232 and the second gear 233 are rotatably connected to the fixing base 100, the first worm wheel 231 is sleeved on the first rotating shaft 220 and meshed with the first gear 232, the second gear 233 is meshed with the first gear 232 and provided with a first connecting portion 234, the connecting member 235 is provided with a first connecting hole 236 and a second connecting hole 237, the second connecting holes 237 are arranged at two ends of the connecting member 235, the first connecting hole 236 is arranged between the two second connecting holes 237, the first connecting portion 234 penetrates through the first connecting hole 236, the diameter of the first connecting hole 236 is smaller than that of the first connecting hole 236, the second rotating assembly 240 is provided with a second connecting portion 242, and the second connecting portion 242 penetrates through the second connecting hole 237.

Referring to fig. 1 to 3, the second rotating assembly 240 includes a rotating arm 241, and a second connecting portion 242 is disposed at an end of the rotating arm 241, which is far away from the second rotating assembly 240, because there is an end distance between the rotating arm 241 and a rotating shaft of the second rotating assembly 240, a force arm is formed between the rotating arm 241 and the rotating shaft of the second rotating assembly 240, and therefore when the connecting member 235 swings, the rotating arm 241 can be driven to swing, so as to drive the second rotating assembly 240 to swing. Referring to fig. 3, the steering wheel 40 is connected to the second rotating assembly 240 through a first fixing shaft 244, the first fixing shaft 244 is in a circular truncated cone shape and penetrates through the second rotating assembly 240, one end of the fixing shaft is connected to the steering wheel 40, and the other end of the fixing shaft abuts against the second rotating assembly 240.

Therefore, when the first driving mechanism 210 rotates, the first worm wheel 231 can be driven to rotate, and since the first worm wheel 231 and the first gear 232 are engaged, when the first worm wheel 231 rotates, the first gear 232 also rotates. Since the second gear 233 is engaged with the first gear 232, when the first gear 232 rotates, the second gear 233 can be driven to rotate, and since the aperture of the first connection hole 236 is larger than that of the first connection part 234, the first connection part 234 can move in the first connection hole 236, so that when the second gear 233 rotates, the connection part 235 can be driven to swing. Since the second rotating assemblies 240 are connected to both ends of the link 235 and the distances from the two second coupling holes 237 to the first coupling hole 236 are equal, the turning angles of the two steerable wheels 40 are always the same when the link 235 swings, and thus the model car can steer.

It can be understood that the first gear 232 can be formed by overlapping two straight gears with different modules, thereby achieving the purpose of reducing the ratio of the rotating speeds of the second gear 233 and the first turbine 231, and further enabling the steering control of the model car to be more accurate. The first rotation assembly 230 may further include a first bevel gear connected to the first rotation shaft 220 and a second bevel gear provided with a first connection portion 234 to change the direction of the force of the first driving mechanism 210 transmitted to the second rotation assembly 240 by the engagement of the first bevel gear and the second bevel gear. It will be appreciated that the second gear 233 is provided with a protrusion (not shown) which is in line contact or point contact with the second gear 233 and which abuts against the connecting member 235, thereby preventing the connecting member 235 from directly contacting the second gear 233 in a surface contact manner, and thus reducing friction between the connecting member 235 and the second gear 233.

According to some embodiments of the present invention, the model car further includes a driving device 300 and a driving shaft 500, two ends of the driving shaft 500 are connected to the driving wheels 50, the driving device 300 includes a second driving mechanism 400, a third gear 410, a fourth gear 420, a fifth gear 430 and a second worm gear 440, the driving shaft 500 is inserted into the fifth gear 430, the second driving mechanism 400 includes a second rotating shaft 401, the third gear 410 is connected to the second rotating shaft 401 and is meshed with the second worm gear 440, the second worm gear 440 is connected to the fifth gear 430, and the fourth gear 420 is connected to the second worm gear 440 and is configured to drive the second worm gear 440, so that the fifth gear 430 drives the driving shaft 500 to rotate.

Specifically, referring to fig. 4, the driving shaft 500 is inserted through the shaft sleeve 80 and the fifth gear 430, and both ends of the driving shaft are connected to the driving wheel 50, the fixing base 100 is provided with a shaft sleeve mounting groove 170, the shape of the shaft sleeve mounting groove 170 matches with the shape of the shaft sleeve 80, and the shaft sleeve 80 is disposed in the shaft sleeve 80 mounting hole to fix the driving shaft 500. The fourth gear 420 and the second worm gear 440 are connected to the same shaft, so that when the third gear 410 rotates the fourth gear 420, the second worm gear 440 and the third gear 410 rotate at the same rotational speed. The second worm gear 440 rotates the fifth gear 430, thereby rotating the driving shaft 500, thereby achieving the effect of enabling the model car to move. The second drive mechanism 400 may be a motor or a magnetic coil, etc.

According to some embodiments of the present invention, the model car further includes a spring (not shown in the figures), the fixing base 100 is provided with a third connecting hole 160, the second rotating assembly 240 includes a third connecting portion 243, the third connecting portion 243 is inserted into the third connecting hole 160 from one end of the third connecting hole 160, the circuit board 20 covers the other end of the third connecting hole 160, one end of the spring abuts against the second rotating assembly 240, and the other end abuts against the circuit board 20.

Specifically, referring to fig. 1 to 3, the third connecting portion 243 is a columnar structure and can be inserted into the third connecting hole 160 from bottom to top, the circuit board 20 is disposed on the upper surface of the fixing base 100 and can cover at least a portion of the third connecting hole 160, so that a second accommodating space (not shown in the figure) is formed between the inner wall of the third connecting hole 160, the circuit board 20 and the third connecting portion 243, and one end of the spring can abut against the third connecting portion 243 while the other end abuts against the circuit board 20, so as to achieve shock absorption of the steering wheel 40. It can be understood that the spring can be sleeved on the third connecting portion 243, one end of the spring abuts against the second rotating component 240, and the other end of the spring abuts against the circuit board 20, so as to enhance the fixation of the spring and prevent the spring from deviating during shock absorption.

According to some embodiments of the present invention, the model car further includes a potentiometer 600, the base 30 is provided with a first groove 110, the potentiometer 600 is located in the first groove 110 and provided with three pins, and is welded to the circuit board 20, the bottom of the first groove 110 is provided with a first through hole 111, the second gear 233 is provided with a fourth connecting portion 238, and the fourth connecting portion 238 is inserted into the first through hole 111 and the fourth connecting hole 610. Specifically, referring to fig. 1 and 4, the fourth connection portion 238 is a columnar structure, and the fourth connection portion 238 is inserted through the first through hole 111 and the fourth connection hole 610. The potentiometer 600 includes three pins, which are disposed through the circuit board 20 and soldered to the circuit board 20. The potentiometer 600 and the second gear 233 overlap in the up-down direction, thereby reducing the occupied space of the potentiometer 600 in the model car while allowing the model car to have the potentiometer 600.

According to some embodiments of the present invention, specifically referring to fig. 4 and 5, the model car further includes a power switch 700 and a switch lever 720, the fixing base 100 is provided with at least one third groove 130, the power switch 700 is fixedly connected to the circuit board 20, and is provided with a first limiting portion 710. The power switch 700 is fixedly connected to the circuit board 20, and the power switch 700 can be opened and closed by the movement of the first limiting portion 710 relative to the power switch 700, so that the circuit of the circuit board 20 is turned on or off, and the control of starting and stopping the model car is realized. The switch lever 720 is substantially "Y" shaped and has a second recess 721 and at least one second position-limiting portion 722, the first position-limiting portion 710 is positioned in the second recess 721 of the switch lever 720, the second position-limiting portion is disposed in the third recess 130 as a rotation shaft of the switch lever 720, the switch lever 720 can swing around the second position-limiting portion 722 to shift the first position-limiting portion 710, so that the first position-limiting portion 710 moves on the power switch 700, and the power switch 700 is turned on or turned off. The base 30 limits the second position-limiting portion 722 in the third groove 130. One end of the switch lever 720, which is far away from the second groove 721, is inserted into the base 30, thereby reducing the size of the space required for the power switch 700 in the model car.

It can be understood that the second slot 721 defines a third receiving space (not labeled in the figures), and the third receiving space can be larger than the second position-limiting portion 722, so that when the switch lever 720 drives the power switch 700, the first position-limiting portion 710 can be prevented from sliding out of the second slot 721 along the inner wall of the second slot 721, thereby causing the power switch 700 to be separated from the circuit board 20. One end of the switch lever 720, which is far away from the second slot 721, can also penetrate through the side surface of the fixing base 100, so that a worker can conveniently control the switch lever 720.

According to some embodiments of the present invention, the model car is provided with a charging socket 70, the charging socket 70 is connected to the fixing base 100 and is located at a side end of the first driving mechanism 210 or the second driving mechanism 400, one end of the charging socket 70 is soldered to the circuit board 20, and the other end thereof is inserted through the base 30. Specifically, referring to fig. 6, the charging socket 70 is located at the left end of the second driving mechanism 400, one end of the charging socket 70 is directly soldered to the circuit board 20, and the end of the charging socket 70 far away from the circuit board 20 is inserted into the base 30, so that the integration of the circuit board 20 and the charging socket 70 is realized, and the size of the space occupied by the charging socket 70 in the model car is reduced. It is understood that the end of the charging socket 70 far from the circuit board 20 can penetrate the base 30, but does not exceed the lower end surface of the base 30, thereby preventing the charging socket 70 from being worn by collision due to vibration of the model car.

According to some embodiments of the present invention, specifically, referring to fig. 3 and 6, the model car includes a pin header 90, a power switch 700, a charging socket 70, a first driving mechanism 210 and a second driving mechanism 400, the first driving mechanism 210 and the second driving mechanism 400 are together disposed in the middle of the fixing base 100, the middle of the fixing base 100 is located at the center of gravity of the fixing base 100, the power switch 700 and the charging socket 70 are respectively disposed on the left and right sides of the middle of the fixing base 100, and the pin header 90 penetrates through the fixing base 100, is welded to the circuit board 20, and is located between the first rotating assembly 230 and the power switch 700. Therefore, the size of the occupied space of the pin header 90 in the model car can be reduced while the model car can adapt to different remote controllers through the pin header 90.

According to some embodiments of the present invention, specifically, referring to fig. 3, 6 and 8, the rear end of the circuit board 20 is provided with a fourth groove 2121, the fourth groove 2121 is located at the rear end of the circuit board 20, the fixing base 100 is recessed toward the fourth groove 2121 to form a fifth groove 120, and the fourth gear 420 and the second turbine 440 are disposed at the fifth groove 120. Since the driving wheel 50 needs to be engaged by gears, thereby avoiding a large energy loss between the second driving mechanism 400 and the driving wheel 50, the model car generally needs to be driven by engaging the transmission force, the combination of the gears and/or the worm gear generally needs to occupy a large space, and the base 30 needs to avoid a structure in which the base 30 protrudes downward in order to avoid a collision with the ground or the track. Therefore, the holder 100 of the model car is recessed toward the fourth recess 2121 to form the fifth recess 120, so that a third accommodating space (not labeled in the figure) can be defined by the base 30 and the holder 100 without deformation of the base 30, and the third accommodating space can accommodate the fourth gear 420 and the second turbine 440.

According to some embodiments of the present invention, the ratio of the sizes of the model car and the prototype car is at least 1/76. Specifically, referring to fig. 7 to 9, the model car further includes a first fixing hole 140 and a second fixing hole 150, and the first fixing hole 140 and the second fixing hole 150 are respectively located at the rear end of the first driving mechanism 210 and the front end of the second driving mechanism 400, thereby ensuring that the model car is uniformly stressed as a whole when the base 30 and the shell 10, or the base 30 and the holder 100, are connected through the fixing holes. The model car further comprises an antenna (not shown) and a battery 60, the antenna and the battery 60 being directly soldered to the circuit board 20, and the battery 60 being soldered to a central portion of the circuit board 20, thereby balancing the center of gravity of the interior structure of the model car. And the parts of the first driving mechanism 210, the second driving mechanism 400 and the like are prevented from being connected with the circuit board 20 by adopting wires, so that the volume of the model car occupied by the parts of the first driving mechanism 210, the second driving mechanism 400 and the like is reduced. Such that the center of gravity of the model car is located at the location of the first drive mechanism 210 and the second drive mechanism 400 of the model car. The shape of the fourth connection hole 610 is an "arrow" shape to indicate the installation direction of the potentiometer 600, and the shape of the fourth connection portion 238 matches the shape of the fourth connection hole 610, thereby achieving the fool-proof effect.

In the description herein, references to the description of "some embodiments" mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. Model car, characterized in that includes:

a fixed seat;

turn to the device, turn to the device and include first actuating mechanism, first runner assembly, connecting piece and two second runner assemblies, first runner assembly and two the second runner assembly all can rotate connect in the fixing base, two the second runner assembly distribute in the both ends of connecting piece and all are connected with and turn to the wheel, and rotatable coupling in the connecting piece, the connecting piece can swing connect in the second runner assembly, first actuating mechanism can pass through first runner assembly drive the connecting piece swing, the connecting piece is used for driving two the second runner assembly syntropy rotates.

2. The model car of claim 1, wherein said first drive mechanism comprises a first shaft, the first rotating assembly comprises a first turbine, a first gear and a second gear, both the first gear and the second gear can be rotatably connected to the fixed seat, the first turbine is connected to the first rotating shaft, and is meshed with the first gear, the second gear is meshed with the first gear and is provided with a first connecting part, the connecting piece is provided with a first connecting hole and a second connecting hole, the second connecting hole is arranged at the two ends of the connecting piece, the first connecting hole is arranged between the two second connecting holes, the first connecting part is arranged through the first connecting hole, and the diameter is less than the aperture of first connecting hole, second rotating assembly is provided with the second connecting portion, the second connecting portion wear to locate the second connecting hole.

3. The model car of claim 1, further comprising a driving device and a driving shaft, wherein driving wheels are connected to two ends of the driving shaft, the driving device comprises a second driving mechanism, a third gear, a fourth gear, a fifth gear and a second turbine, the driving shaft is arranged through the fifth gear, the second driving mechanism comprises a second rotating shaft, the third gear is connected to the second rotating shaft and meshed with the second turbine, the second turbine is connected to the fifth gear, and the fourth gear is connected to the second turbine and is used for driving the second turbine so that the fifth gear drives the driving shaft to rotate.

4. The model car according to claim 2, further comprising a circuit board and a spring, wherein the fixing base is provided with a third connecting hole, the second rotating assembly comprises a third connecting portion, the third connecting portion is inserted into the third connecting hole from one end of the third connecting hole, the circuit board covers at least part of the other end of the third connecting hole, one end of the spring abuts against the second rotating assembly, and the other end abuts against the circuit board.

5. The model car of claim 2, further comprising a circuit board, a potentiometer and a base, wherein the base is provided with a first groove, the potentiometer is located in the first groove and provided with a fourth connecting hole, the potentiometer is welded to the circuit board, a first through hole is provided at a bottom of the first groove, the second gear is provided with a fourth connecting portion, and the fourth connecting portion is inserted into the first through hole and the fourth connecting hole.

6. The model car according to claim 4, further comprising a circuit board, a power switch, and a switch lever, wherein the holder has at least one third recess, the power source is fixedly connected to the circuit board, the model car further comprises a first position-limiting portion, the first position-limiting portion is movably connected to the power switch, the switch lever has a second recess and at least one second position-limiting portion, the first position-limiting portion is disposed in the second recess, the second position-limiting portion is disposed in the third recess, and the switch lever is capable of swinging around the second position-limiting portion to move the first position-limiting portion.

7. The model car of claim 3, wherein the model car comprises a circuit board, a charging socket and a base, the charging socket is connected to the fixing base and is located at a side end of the first driving mechanism or a side end of the second driving mechanism, one end of the charging socket is welded to the circuit board, and the other end of the charging socket penetrates through the base.

8. The model car according to claim 1, further comprising a circuit board, a pin header, a power switch, a charging socket, a first driving mechanism and a second driving mechanism, wherein the first driving mechanism and the second driving mechanism are disposed at the middle of the fixing base, the power switch and the charging socket are disposed at two sides of the middle of the fixing base, and the pin header is inserted into the fixing base, welded to the circuit board, and located between the first rotating assembly and the power switch.

9. The model car of claim 3, further comprising a circuit board, wherein the circuit board is provided with a fourth groove, the holder is recessed toward the fourth groove to form a fifth groove, and the fourth gear and the second turbine are disposed in the fifth groove.

10. The model car of claim 1, wherein the ratio of the sizes of the model car and the prototype car is at least 1/76.

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