A car model structure

Abstract

The application discloses a car model structure and relates to the technical field of car models, which comprises a chassis, a battery box arranged on the upper surface of the chassis, a controller arranged on the side of the upper surface of the chassis close to the battery box, a first rear wheel and a first front wheel rotatably connected to the two sides of the chassis respectively, and the diameter of the first rear wheel is 3 cm and the diameter of the first front wheel is 3.2 cm. The car model structure disclosed by the application drives the second threaded rod to rotate through the control of the small motor, thereby driving the clamping plate and the rotating wheel to move linearly, so that the belt moves away from the direction of the large motor, and the rotating speed of the rotating wheel is reduced. Since the power of the large motor is limited, the torque of the rotating wheel is increased at the same time, so that the torque is increased during the rotation of the first rear wheel, and the rotating wheel of the car model is smooth during the climbing process and will not be stuck and skid. In the case that the endurance of the car model is not reduced, the effect of improving the passing performance of the car model in complex environments is achieved.

Description

Technical Field

[0001] This invention relates to the field of car model technology, and more particularly to a car model structure. Background Technology

[0002] With the development of technology, modular car model technology has gradually emerged and become a major trend in the remote control car model market. Unlike traditional pre-made remote control car models, modular car models allow children to participate in the construction process. From the selection of parts to the completion of assembly, the whole process can stimulate their creativity and hands-on ability. This interactive design not only allows children to understand the internal structure and working principle of the car model, but also cultivates their logical thinking and problem-solving ability, enabling them to learn while playing and stimulating their interest in science and engineering.

[0003] Existing remote-controlled car models still have some shortcomings in performance. When performing high-load operations such as climbing hills, the motors of existing remote-controlled car models often have high speeds but low torques. This makes the motors prone to jamming when facing steep slopes or uneven roads. Excessive current may cause circuit overload and overheating, or even damage the control circuit. This situation can not only damage the remote-controlled car model, but also pose safety hazards. Therefore, the current speed control methods of remote-controlled car models are relatively simple and cannot meet the needs of multiple scenarios. Summary of the Invention

[0004] This invention discloses a car model structure, which aims to solve the technical problems in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A car model structure includes a chassis, a battery box is disposed on the upper surface of the chassis, a controller is disposed on the upper surface of the chassis near the battery box, and a first rear wheel and a first front wheel are rotatably connected to the two sides of the chassis respectively, the first rear wheel having a diameter of 3cm and the first front wheel having a diameter of 3.2cm.

[0007] An engine housing is located on the upper surface of the chassis, near the battery box. A rear drive mechanism is installed inside the engine housing. The rear drive mechanism includes a conical wheel, a belt, a second threaded rod, a clamping plate, and a rotating wheel. The second threaded rod rotates to drive the clamping plate to move linearly, and the clamping plate drives the rotating wheel and the belt to move linearly. Due to the conical design of the conical wheel, the transmission ratio between the conical wheel and the rotating wheel changes as the positions of the rotating wheel and the belt change.

[0008] A servo housing is provided on the upper surface of the chassis near the controller. A steering mechanism is installed inside the servo housing. The steering mechanism includes a first threaded rod, a deflection plate, a slide groove, and a moving rod. The moving rod slides inside the slide groove and the position of the servo is adjusted by rotating the first threaded rod, thereby changing the position of the moving rod inside the slide groove and changing the distance the moving rod moves, thus changing the rotation angle of the first rear wheel.

[0009] A wheel mechanism is installed on one side of the first rear wheel and the first front wheel. The wheel mechanism is used to install and replace the wheels.

[0010] The top of the chassis is equipped with a simulation component that mimics the appearance of a car, increasing the fun of the model car.

[0011] The rear drive mechanism also includes a large motor fixedly connected to the bottom of the inner wall of the engine housing. The conical wheel is fixedly connected to one end of the output shaft of the large motor. A mounting bracket is fixedly connected to one side of the inner wall of the engine housing. A small motor is fixedly connected to one end of the mounting bracket. The second threaded rod is fixedly connected to one end of the output shaft of the small motor. The second threaded rod is threadedly connected to the clamping plate. A rotating cylinder is rotatably connected to the other end of the mounting bracket. The controller is electrically connected to both the small motor and the large motor.

[0012] A square rod is slidably connected inside the rotating cylinder. One end of the square rod is fixedly connected to the rotating wheel. The rotating wheel is located inside the clamping plate. The belt is disposed between the conical wheel and the rotating wheel. A guide rod is fixedly connected to one side of the mounting frame. The guide rod is slidably connected to the clamping plate. A second rotating block and a first rotating block are rotatably connected to both ends of the mounting frame, respectively. An adjusting motor is disposed at one end of the first rotating block.

[0013] The other end of the second rotating block is rotatably connected to a tensioning roller. One end of the rotating cylinder is fixedly connected to a small gear. An intermediate gear is rotatably connected inside the engine housing near the small gear. The small gear and the intermediate gear mesh. A main shaft is rotatably connected to one side edge of the engine housing. One end of the main shaft is fixedly connected to a large gear. The intermediate gear meshes with the large gear. The main shaft rotates coaxially with the first rear wheel. Multiple buckles are provided on the edge of the engine housing.

[0014] In a preferred embodiment, the steering mechanism further includes a base disposed at the bottom of the servo housing. Two slide rails are fixedly connected inside the servo housing. A fixed block is slidably connected above the slide rails. A servo is fixedly connected to one side of the fixed block. One end of the servo output shaft is fixedly connected to a deflection plate. The servo is electrically connected to a controller. A slide groove is disposed at one end of the deflection plate. A knob is fixedly connected to the top end of the first threaded rod. Rotating frames are rotatably connected to both sides of the base. A linkage plate is rotatably connected to one side of the rotating frame. The linkage plate is inside the base. A moving rod is disposed on the upper surface of the linkage plate.

[0015] In a preferred embodiment, the wheel mechanism includes two second front wheels and two second rear wheels. Each end of the main shaft has a locking block. A rear axle is located on one side of the first rear wheel, and one end of the rear axle has a mounting hole. The first rear wheel is fixed to one end of the rear axle by screws. The two second front wheels have a diameter of 3.4 cm, and the two second rear wheels have a diameter of 3.6 cm. The other end of the rear axle has a slot, and the locking block is inserted into the slot to achieve coaxial rotation between the locking block and the first rear wheel. One side of the rotating frame is fixedly connected to the front axle, and one end of the front axle is rotatably connected to the first front wheel.

[0016] In a preferred embodiment, the simulation component includes an exterior layer fixedly connected to the upper surface of the interior layer, with doors rotatably connected to both sides of the exterior layer, an engine hood rotatably connected to one end of the exterior layer, and an operating cover rotatably connected to the other end of the exterior layer. One end of the interior layer has a hollowed-out portion, a rearview mirror is provided on the outer wall of the car door, a rear spoiler is provided on the upper surface of the engine hood, and a seat and steering wheel are provided on the upper surface of the interior layer.

[0017] As can be seen from the above, the car model structure provided by the present invention has the following technical effects.

[0018] Firstly, by controlling the small motor to drive the second threaded rod to rotate, the clamping plate and rotating wheel move linearly, causing the belt to move away from the large motor, thus reducing the rotation speed of the rotating wheel. Due to the power limitation of the large motor, the torque of the rotating wheel increases, thereby increasing the torque of the first rear wheel during rotation. This ensures that the first rear wheel rotates smoothly without jamming or slipping during the model car's ascent, improving the model car's ability to pass through complex environments without reducing its range.

[0019] Secondly, if it is necessary to adjust the steering angle of the model car, the position of the moving rod in the slide can be changed by turning the knob. For example, the closer the moving rod is to the knob, the smaller the turning radius of the first front wheel when the servo drives the deflector plate to rotate, and vice versa. This can be used to adjust the steering amplitude.

[0020] Thirdly, by replacing the two first front wheels and two first rear wheels with two second front wheels and two second rear wheels, the diameters of the two second front wheels and two second rear wheels are larger than the diameters of the first front wheels and two first rear wheels, thereby increasing the height of the chassis. With the increase in wheel diameter, the resistance increases, and the wheels move away from the large motor via belts, reducing the rotational speed of the rotating wheels. This increases the torque during the rotation of the two second rear wheels, eliminating the effects of the increased wheel diameter.

[0021] Fourthly, the chassis, exterior layer, interior layer, front wheels, and rear wheels of this application are all designed to be detachable, making the overall assembly and playability of the model car more advanced. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the isometric structure proposed in this invention.

[0023] Figure 2 This is a side view schematic diagram of the structure proposed in this invention.

[0024] Figure 3 This is a schematic diagram of the engine hood and door opening states proposed in this invention.

[0025] Figure 4 This is an exploded view of the exterior and interior layer structures proposed in this invention.

[0026] Figure 5 This is an exploded view of the first rear wheel and the first front wheel structure proposed in this invention.

[0027] Figure 6 This is a schematic diagram of the base structure proposed in this invention.

[0028] Figure 7 This is a schematic diagram of the second front wheel structure proposed in this invention.

[0029] Figure 8 This is a schematic diagram of the deflection plate structure proposed in this invention.

[0030] Figure 9 This is a schematic diagram of the conical wheel structure proposed in this invention.

[0031] Figure 10 The present invention proposes Figure 9 A magnified structural diagram of point A in the middle.

[0032] Figure 11 This is a schematic diagram of the clamping plate structure proposed in this invention.

[0033] In the diagram: 1. Chassis; 2. Exterior layer; 3. Engine hood; 4. First rear wheel; 5. Door; 6. First front wheel; 7. Interior layer; 8. Engine housing; 9. Controller; 10. Servo housing; 11. Battery box; 12. Rear axle; 13. Front axle; 14. Knob; 15. Clip; 16. Block; 17. Rotating frame; 18. Linkage plate; 19. Moving rod; 20. Base; 21. Second front wheel; 22. Second rear wheel; 23. First threaded rod; 24. Fixing block; 25. Slide rail; 26. Rudder 27. Machine; 28. Slide groove; 29. ​​Deflecting plate; 30. Conical wheel; 31. Large gear; 32. Intermediate gear; 33. Small gear; 34. Belt; 35. First rotating block; 36. Small motor; 37. Mounting bracket; 38. Large motor; 39. Main shaft; 40. Tensioning roller; 41. Adjusting motor; 42. Second rotating block; 43. Rotating cylinder; 44. Square rod; 45. Rotating rod; 46. Second threaded rod; 47. Clamping plate; 48. Guide rod; 49. Rotating wheel; 50. Operating cover; 51. Hollowed-out section. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figure 1 — Figure 11 A vehicle model structure includes a chassis 1, a battery box 11 is provided on the upper surface of the chassis 1, a controller 9 is provided on the side of the upper surface of the chassis 1 near the battery box 11, and a first rear wheel 4 and a first front wheel 6 are rotatably connected to both sides of the chassis 1, the first rear wheel 4 has a diameter of 3cm, and the first front wheel 6 has a diameter of 3.2cm.

[0036] An engine housing 8 is located on the upper surface of the chassis 1 on the other side near the battery box 11. A rear drive mechanism is installed inside the engine housing 8. The rear drive mechanism includes a conical wheel 29, a belt 33, a second threaded rod 45, a clamping plate 46, and a rotating wheel 48. The second threaded rod 45 rotates to drive the clamping plate 46 to move linearly. The clamping plate 46 drives the rotating wheel 48 and the belt 33 to move linearly. Due to the conical design of the conical wheel 29, the transmission ratio between the conical wheel 29 and the rotating wheel 48 changes as the positions of the rotating wheel 48 and the belt 33 change.

[0037] A servo housing 10 is provided on the upper surface of the chassis 1 near the controller 9. A steering mechanism is installed inside the servo housing 10. The steering mechanism includes a first threaded rod 23, a deflection plate 28, a slide groove 27, and a moving rod 19. The moving rod 19 slides inside the slide groove 27 and adjusts the position of the servo 26 through the first threaded rod 23. Rotating the first threaded rod 23 fixes the position of the servo 26, thereby changing the position of the moving rod 19 inside the slide groove 27, changing the distance the moving rod 19 moves, and thus changing the rotation angle of the first rear wheel 4.

[0038] A wheel mechanism is installed on one side of the first rear wheel 4 and the first front wheel 6. The wheel mechanism is used to install and replace the wheels.

[0039] The top of chassis 1 is equipped with a simulation component, which is used to mimic the appearance of a car and increase the fun of the model car.

[0040] The rear drive mechanism also includes a large motor 37 fixedly connected to the bottom of the inner wall of the engine housing 8, a conical wheel 29 fixedly connected to one end of the output shaft of the large motor 37, a mounting bracket 36 fixedly connected to one side of the inner wall of the engine housing 8, a small motor 35 fixedly connected to one end of the mounting bracket 36, a second threaded rod 45 fixedly connected to one end of the output shaft of the small motor 35, the second threaded rod 45 threadedly connected to the clamping plate 46, a rotating cylinder 42 rotatably connected to the other end of the mounting bracket 36, and a controller 9 electrically connected to the small motor 35 and the large motor 37 respectively.

[0041] A square rod 43 is slidably connected inside the rotating cylinder 42. One end of the square rod 43 is fixedly connected to the rotating wheel 48, which is located inside the clamping plate 46. A belt 33 is disposed between the conical wheel 29 and the rotating wheel 48. A guide rod 47 is fixedly connected to one side of the mounting frame 36, and the guide rod 47 is slidably connected to the clamping plate 46. A second rotating block 41 and a first rotating block 34 are rotatably connected to both ends of the mounting frame 36, and an adjusting motor 40 is disposed at one end of the first rotating block 34.

[0042] The other end of the second rotating block 41 is rotatably connected to a tension roller 39. One end of the rotating cylinder 42 is fixedly connected to a small gear 32. Inside the engine housing 8, near the position of the small gear 32, an intermediate gear 31 is rotatably connected. The small gear 32 and the intermediate gear 31 mesh. One side edge of the engine housing 8 is rotatably connected to a main shaft 38. One end of the main shaft 38 is fixedly connected to a large gear 30. The intermediate gear 31 meshes with the large gear 30. The main shaft 38 rotates coaxially with the first rear wheel 4. Multiple buckles 15 are provided on the edge of the engine housing 8.

[0043] In this embodiment, different usage environments and varying ground undulations cause the model car to slow down as it climbs an incline, requiring greater torque. By controlling the small motor 35 to rotate the second threaded rod 45, the clamping plate 46 and the rotating wheel 48 move linearly, thus shifting the positions of the belt 33 and the rotating wheel 48. The belt 33's position on the conical wheel 29 varies, and due to the conical shape of the wheel 29, its diameter differs at different positions. As the conical wheel 29 drives the rotating wheel 48 via the belt 33, the belt 33 moves away from the large motor 37, reducing the rotational speed of the rotating wheel 48. Due to the power limitation of the large motor 37, this simultaneously increases the torque of the rotating wheel 48, thereby increasing the torque during the rotation of the first rear wheel 4. This ensures smooth rotation of the first rear wheel 4 during the incline, preventing jamming and slippage, and improving the model car's ability to navigate complex environments without reducing its range.

[0044] It's also worth explaining that changing the position of belt 33 alters the speed and torque of the first rear wheel 4 in a manner similar to a continuously variable transmission (CVT). CVT technology allows users to freely control the vehicle's speed according to their needs, achieving smooth acceleration and deceleration, and providing a more flexible driving experience. Whether on flat roads or in complex terrain, users can easily adjust the vehicle speed to adapt to different environmental challenges. On steep slopes, the low-speed mode provides greater torque to ensure the vehicle climbs smoothly, while in open areas, the high-speed mode offers the pleasure of fast driving. In addition, CVT also improves vehicle stability and reduces the risk of loss of control during high-speed driving.

[0045] Furthermore, on a smooth surface, the belt 33 moves towards the large motor 37, increasing the rotational speed of the rotating wheel 48 and decreasing its torque, thereby increasing the rotational speed of the first rear wheel 4. This increases the vehicle's speed without changing the rotational speed of the large motor 37. During the movement of the belt 33, the motor 40 drives the first rotating block 34 and the second rotating block 41 to rotate. The first rotating block 34 and the second rotating block 41 drive the tension roller 39 to press the belt 33, keeping the belt 33 constantly taut and preventing it from slipping on the conical pulley 29. This ensures continuous power output from the large motor 37.

[0046] The belt 33 has an internal fiber reinforcement layer (nylon, polyester fiber, etc.) to make it tough. When the position of the belt 33 is adjusted by the small motor 35, the controller 9 will simultaneously control the adjusting motor 40 to drive the first rotating block 34 and the second rotating block 41 to rotate, releasing the tension roller 39 from pressing the belt 33. When the position is adjusted, the small motor 35 stops rotating. At this time, the adjusting motor 40 will drive the first rotating block 34 and the second rotating block 41 to rotate again, so that the tension roller 39 presses the belt 33, ensuring the straightness of the belt 33.

[0047] Specifically, both the conical wheel 29 and the belt 33 have anti-slip textures on their surfaces to ensure the transmission effect of both.

[0048] Reference Figure 1 , Figure 4 , Figure 6 and Figure 8 In a preferred embodiment, the steering mechanism further includes a base 20 disposed at the bottom of the servo housing 10. Two slide rails 25 are fixedly connected inside the servo housing 10. A fixing block 24 is slidably connected above the slide rails 25. A servo motor 26 is fixedly connected to one side of the fixing block 24. One end of the output shaft of the servo motor 26 is fixedly connected to the deflection plate 28. The servo motor 26 is electrically connected to the controller 9. A slide groove 27 is disposed at one end of the deflection plate 28. A knob 14 is fixedly connected to the top end of the first threaded rod 23. Rotating frames 17 are rotatably connected to both sides of the base 20. A linkage plate 18 is rotatably connected to one side of the rotating frame 17. The linkage plate 18 is inside the base 20. A moving rod 19 is disposed on the upper surface of the linkage plate 18.

[0049] In this embodiment, the rotatable knob 14 raises the first threaded rod 23 and disengages it from the surface of the base 20. At this time, by turning the knob 14, the servo motor 26 slides horizontally along the surface of the slide rail 25, thereby changing the position of the moving rod 19 in the slide groove 27. For example, the closer the moving rod 19 is to the knob 14, the smaller the turning radius of the first front wheel 6 when the servo motor 26 drives the deflection plate 28 to rotate, and vice versa. Finally, the knob 14 is rotated again to lower the first threaded rod 23 and press it against the surface of the base 20, thereby fixing the position of the servo motor 26, which can adjust the steering amplitude.

[0050] It should be noted that since the movement trajectory of the deflection plate 28 is arc-shaped, while the movement trajectory of the moving rod 19 is straight-line, when the moving rod 19 adjusts and slides in the slide groove 27 to reach the limit position, the moving rod 19 will not contact the two ends of the slide groove 27, thereby avoiding motion interference.

[0051] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7In a preferred embodiment, the wheel mechanism includes two second front wheels 21 and two second rear wheels 22. A locking block 16 is provided at each end of the main shaft 38. A rear axle 12 is provided on one side of the first rear wheel 4. One end of the rear axle 12 has a mounting hole, and the first rear wheel 4 is fixed to one end of the rear axle 12 by screws. The two second front wheels 21 have a diameter of 3.4 cm, and the two second rear wheels 22 have a diameter of 3.6 cm. The other end of the rear axle 12 has a slot, and the locking block 16 is inserted into the slot, enabling coaxial rotation of the locking block 16 and the first rear wheel 4. A front axle 13 is fixedly connected to one side of the rotating frame 17, and one end of the front axle 13 is rotatably connected to the first front wheel 6.

[0052] In this embodiment, under different road conditions, two second front wheels 21 and two second rear wheels 22 are used to replace two first front wheels 6 and two first rear wheels 4. The diameters of the two second front wheels 21 and two second rear wheels 22 are larger than the diameters of the first front wheels 6 and two first rear wheels 4, thereby increasing the height of the chassis 1. As the wheel diameter increases, the resistance increases. By controlling the belt 33 to move away from the large motor 37, the rotation speed of the rotating wheel 48 is reduced, thereby increasing the torque during the rotation of the two second rear wheels 22 and eliminating the effects of the increased wheel diameter.

[0053] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In a preferred embodiment, a simulation component is mounted on the top of the chassis 1, and an interior layer 7 is fixedly connected to the upper surface of the chassis 1. The simulation component includes an exterior layer 2 fixedly connected to the upper surface of the interior layer 7. Doors 5 are rotatably connected to both sides of the exterior layer 2, an engine hood 3 is rotatably connected to one end of the exterior layer 2, and an operating cover 49 is rotatably connected to the other end of the exterior layer 2. A hollow portion 50 is provided at one end of the interior layer 7, a rearview mirror is provided on the outer wall of the door 5, a rear spoiler is provided on the upper surface of the engine hood 3, and a seat and steering wheel are provided on the upper surface of the interior layer 7.

[0054] In this embodiment, the design of the card block 16 and the card slot makes the installation and removal of the engine housing 8 faster. The design of multiple buckles 15 facilitates the installation of internal parts of the engine housing 8. By making the exterior layer 2 and interior layer 7 imitate the appearance and interior of a real car, the aesthetics and fun of the car model are increased.

[0055] Furthermore, by rotating the operating cover 49, the hollow part 50 is exposed, and the knob 14 is located inside the hollow part 50. By manually adjusting the knob 14, the position of the servo motor 26 can be adjusted, which facilitates the adjustment of the steering force of the model car.

[0056] Working principle: When in use, the large motor 37 drives the conical wheel 29 to rotate, which in turn drives the rotating wheel 48 to rotate via the conical wheel 29 and the belt 33. The rotating wheel 48 drives the rotating rod 44, the square rod 43 and the rotating cylinder 42 to rotate, which in turn drives the small gear 32, the intermediate gear 31 and the large gear 30 to rotate, which in turn drives the main shaft 38 and the first rear wheel 4 to rotate, thus realizing the forward movement of the model car. The large motor 37 reverses to realize the backward movement of the model car.

[0057] As the model car climbs the slope, its speed decreases, requiring greater torque. This is achieved by controlling the small motor 35 to rotate the second threaded rod 45, which in turn moves the clamping plate 46 and the rotating wheel 48 linearly. This causes the belt 33 and the rotating wheel 48 to move. The belt 33 is positioned differently on the conical wheel 29. Since the conical wheel 29 is conical, its diameter varies at different positions. As the conical wheel 29 drives the rotating wheel 48 through the belt 33, the belt 33 moves away from the large motor 37, reducing the rotational speed of the rotating wheel 48. Due to the power limitation of the large motor 37, this also increases the torque of the rotating wheel 48, thereby increasing the torque during the rotation of the first rear wheel 4. This ensures that the first rear wheel 4 rotates smoothly without jamming or slipping during the uphill process.

[0058] On a smooth surface, the belt 33 moves towards the large motor 37, increasing the rotation speed of the rotating wheel 48 and decreasing its torque, thereby increasing the rotation speed of the first rear wheel 4 and improving the speed of the model vehicle.

[0059] When a turn is needed, the servo motor 26 drives the deflector plate 28 to deflect, which in turn drives the rotating frame 17 and the first front wheel 6 to deflect via the moving rod 19 and the linkage plate 18, thus achieving the steering of the model car. If the steering angle needs to be adjusted, the knob 14 can be rotated to raise the first threaded rod 23 and disengage it from the surface of the base 20. At this time, by turning the knob 14, the servo motor 26 can slide horizontally along the surface of the slide rail 25, thereby changing the position of the moving rod 19 in the slide groove 27. For example, the closer the moving rod 19 is to the knob 14, the smaller the turning radius of the first front wheel 6 when the servo motor 26 drives the deflector plate 28 to rotate, and vice versa.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A vehicle model structure comprising a chassis (1), characterized in that, The upper surface of the chassis (1) is provided with a battery box (11), the upper surface of the chassis (1) is provided with a controller (9) on one side near the battery box (11), and the two sides of the chassis (1) are respectively rotatably connected with a first rear wheel (4) and a first front wheel (6); The upper surface of the chassis (1) is provided with an engine shell (8) on the other side near the battery box (11), the inside of the engine shell (8) is provided with a rear drive mechanism, the rear drive mechanism comprises a conical wheel (29), a belt (33), a second threaded rod (45), a clamping plate (46) and a rotating wheel (48), the clamping plate (46) is driven to move linearly by the rotation of the second threaded rod (45), the rotating wheel (48) and the belt (33) are driven to move linearly by the clamping plate (46), and since the conical wheel (29) is designed in a conical shape, the transmission ratio between the conical wheel (29) and the rotating wheel (48) changes after the position of the rotating wheel (48) and the belt (33) changes; The upper surface of the chassis (1) is provided with a steering gear shell (10) near the controller (9), the inside of the steering gear shell (10) is provided with a steering mechanism, the steering mechanism comprises a first threaded rod (23), a deflection plate (28), a sliding groove (27) and a moving rod (19), the moving rod (19) slides in the sliding groove (27), and the position of a steering gear (26) is adjusted by the rotation of the first threaded rod (23), so that the position of the moving rod (19) in the sliding groove (27) is changed, the movement distance of the moving rod (19) is changed, and the rotation angle of the first rear wheel (4) is changed; One side of the first rear wheel (4) and the first front wheel (6) is provided with a wheel mechanism for installing and replacing wheels; The rear drive mechanism further comprises a large motor (37) fixedly connected to the bottom of the inner wall of the engine shell (8), one end of the output shaft of the large motor (37) is fixedly connected with the conical wheel (29), one side of the inner wall of the engine shell (8) is fixedly connected with a mounting bracket (36), one end of the mounting bracket (36) is fixedly connected with a small motor (35), one end of the output shaft of the small motor (35) is fixedly connected with the second threaded rod (45), the second threaded rod (45) is threadedly connected with the clamping plate (46), the other end of the mounting bracket (36) is rotatably connected with a rotating cylinder (42), and the controller (9) is electrically connected with the small motor (35) and the large motor (37).

2. A vehicle model structure according to claim 1, wherein The inside of the rotating cylinder (42) is slidably connected with a square rod (43), one end of the square rod (43) is fixedly connected with the rotating wheel (48), the rotating wheel (48) is located in the inside of the clamping plate (46), the belt (33) is arranged between the conical wheel (29) and the rotating wheel (48), one side of the mounting bracket (36) is fixedly connected with a guide rod (47), the guide rod (47) is slidably connected with the clamping plate (46), and the two ends of the mounting bracket (36) are respectively rotatably connected with a second rotating block (41) and a first rotating block (34), and one end of the first rotating block (34) is provided with an adjusting motor (40).

3. A vehicle model structure according to claim 2, wherein One end of the second rotating block (41) is rotatably connected with a tension roller (39), one end of the rotating cylinder (42) is fixedly connected with a pinion (32), the inside of the engine shell (8) is rotatably connected with an intermediate gear (31) near the pinion (32), the pinion (32) and the intermediate gear (31) are engaged, one side edge of the engine shell (8) is rotatably connected with a main shaft (38), one end of the main shaft (38) is fixedly connected with a gear wheel (30), the intermediate gear (31) is engaged with the gear wheel (30), the main shaft (38) is coaxially rotatable with the first rear wheel (4), and the edge of the engine shell (8) is provided with a plurality of buckles (15).

4. A vehicle model structure according to claim 3, wherein The steering mechanism further comprises a base (20) arranged at the bottom of the steering gear shell (10), the inside of the steering gear shell (10) is fixedly connected with two slide rails (25), the upper side of the slide rail (25) is slidably connected with a fixed block (24), one side of the fixed block (24) is fixedly connected with a steering gear (26), one end of the output shaft of the steering gear (26) is fixedly connected with a deflection plate (28), and the steering gear (26) is electrically connected with the controller (9).

5. A vehicle model structure according to claim 4, wherein The sliding groove (27) is arranged at one end of the deflection plate (28), the top end of the first threaded rod (23) is fixedly connected with a knob (14), both sides of the base (20) are rotatably connected with rotating frames (17), one side of the rotating frame (17) is rotatably connected with a linkage piece (18), the linkage piece (18) is arranged in the inside of the base (20), and the upper surface of the linkage piece (18) is provided with a moving rod (19).

6. A vehicle model structure according to claim 5, wherein The wheel mechanism comprises two second front wheels (21) and two second rear wheels (22), both ends of the main shaft (38) are provided with clamping blocks (16), one side of the first rear wheel (4) is provided with a rear axle (12), one end of the rear axle (12) is provided with a mounting hole, and the first rear wheel (4) is fixed at one end of the rear axle (12) by being screwed into the mounting hole.

7. A vehicle model structure according to claim 6, wherein The other end of the rear axle (12) is provided with a clamping groove, the clamping block (16) is inserted into the clamping groove, and coaxial rotation of the clamping block (16) and the first rear wheel (4) is realized, one side of the rotating frame (17) is fixedly connected with a front axle (13), and one end of the front axle (13) is rotatably connected with the first front wheel (6).

8. A vehicle model structure according to claim 7, wherein The top of the chassis (1) is provided with a simulation component, the upper surface of the chassis (1) is fixedly connected with an interior layer (7), the simulation component comprises an appearance layer (2) fixedly connected to the upper surface of the interior layer (7), both sides of the appearance layer (2) are rotatably connected with doors (5), one end of the appearance layer (2) is rotatably connected with an engine cover (3), and the other end of the appearance layer (2) is rotatably connected with an operation cover (49), and one end of the interior layer (7) is provided with a hollow part (50).

9. A vehicle model structure according to claim 8, wherein The outer wall of the door (5) is provided with a rearview mirror, the upper surface of the engine cover (3) is provided with a tail fin, and the upper surface of the interior layer (7) is provided with a seat and a steering wheel.

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