Optimized four-wheel-drive model car

Abstract

The utility model provides an optimized four-wheel-drive model car which comprises a chassis, two front wheels connected to the chassis through a front wheel shaft, two rear wheels connected to the chassis through a rear wheel shaft, a front differential mechanism connected to the front wheel shaft in a sleeved mode, a front differential mechanism provided with a front differential gear, a rear differential mechanism connected to the rear wheel shaft in a sleeved mode, a rear differential mechanism provided with a rear differential gear and a motor installed on the chassis. The motor drives the main driving shaft in a rotating mode through the transmission mechanism, the front transmission gear is fixedly arranged at the front end of the main driving shaft and connected with the front differential gear in a meshed mode, and the rear transmission gear is fixedly arranged at the rear end of the main driving shaft and connected with the rear differential gear in a meshed mode. The differential mechanism is combined to provide mechanical automatic differential speed, the car model can automatically provide the optimal differential speed matched with the steering angle, and the four-wheel car model is better than a traditional four-wheel car model in both effect and convenience. And a clutch braking scheme is newly added, so that the speed of the vehicle is reduced more quickly, and braking and speed reduction can be performed more quickly. The motor burden is reduced and the heating problem is relieved.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle technology and relates to a drive structure, particularly an optimized four-wheel drive model vehicle. Background Technology

[0002] In the basic four-wheel racing category of intelligent car competitions, contestants' designed intelligent vehicles are required to complete a race on a PVC track composed of various elements such as straightaways, roundabouts, curves, ramps, and obstacles, and return to the starting point. Each year's competition changes not only innovate the elements but also gradually increase the requirements for vehicle model structure innovation, demanding higher levels of handling and stability in order to achieve greater speeds. Currently used common vehicle models mainly suffer from the following problems:

[0003] 1. Braking is not quick enough, and the motor overheats severely:

[0004] Existing vehicle deceleration relies entirely on controlling the motor for speed reduction, which places high demands on software control, has poor braking effect, and is prone to causing the motor to overheat. Under high-speed or long-term use, the overall performance of the vehicle will decline rapidly, resulting in insufficient deceleration effect and stability.

[0005] 2. Poor acceleration and deceleration performance:

[0006] Existing C-type car models use rear-wheel drive, with a small motor gear reduction ratio and low torque, making it impossible to meet the requirements for rapid acceleration and deceleration at high speeds.

[0007] 3. Insufficient handling and stability:

[0008] The existing model uses a rear-wheel drive structure, which causes a significant decrease in grip and stability as speed increases. In addition, since the traditional design does not include a mechanical differential system, the differential needs to be controlled by software, which makes it prone to rollover at high speeds and results in insufficient stability, failing to meet the actual needs of use in competitions.

[0009] 4. Requires external differential speed control:

[0010] Traditional four-wheeled vehicle models require users to use software algorithms to control and adjust them to obtain a better rear wheel differential. This places high demands on the algorithm and adjustment. At high speeds, the vehicle may even roll over due to changes in vehicle speed and a mismatch in differential speed, and the effect cannot be optimal. Utility Model Content

[0011] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an optimized four-wheel drive model vehicle.

[0012] The objective of this utility model can be achieved through the following technical solution: An optimized four-wheel drive model car includes a chassis. Two front wheels are connected to the chassis via a front axle, and two rear wheels are connected via a rear axle. A front differential is fitted onto the front axle, and the front differential has a front differential gear. A rear differential is fitted onto the rear axle, and the rear differential has a rear differential gear. A motor is mounted on the chassis, and the motor drives a main drive shaft in a rotary manner through a transmission mechanism. A front transmission gear is fixed at the front end of the main drive shaft, and the front transmission gear meshes with the front differential gear. A rear transmission gear is fixed at the rear end of the main drive shaft, and the rear transmission gear meshes with the rear differential gear.

[0013] In the aforementioned optimized four-wheel drive model vehicle, the front differential gear, the rear differential gear, the front drive gear, and the rear drive gear are all bevel gears; the front drive gear and the front differential gear form a transmission ratio one, and the rear drive gear and the rear differential gear form a transmission ratio two, with transmission ratio one and transmission ratio two being equal.

[0014] In the above-mentioned optimized four-wheel drive model car, the transmission mechanism includes a motor gear fixedly mounted on the motor shaft, a reduction gear set hinged on the chassis, a main drive gear fixedly mounted on the main drive shaft, the motor gear meshing with the reduction gear set, and the reduction gear set meshing with the main drive gear.

[0015] In the aforementioned optimized four-wheel drive model car, the reduction gear set includes a reduction shaft. The two ends of the reduction shaft are mounted on the chassis via bearing seats. A first reduction wheel and a second reduction wheel are sleeved on the reduction shaft. The first reduction wheel meshes with the motor gear, and the second reduction wheel meshes with the main drive gear. The number of teeth on the first reduction wheel and the second reduction wheel are not equal.

[0016] In the aforementioned optimized four-wheel drive model vehicle, a clutch is installed on the chassis, a rotatable clutch shaft is provided on the clutch, a clutch gear is fixedly mounted on the clutch shaft, and the main drive gear is meshed with the clutch gear.

[0017] In the aforementioned optimized four-wheel drive model vehicle, an encoder is installed on the chassis, an input shaft is provided on the encoder, an encoding gear is fixedly mounted on the input shaft, and the encoding gear is meshed with the clutch gear.

[0018] In the aforementioned optimized four-wheel drive model car, a servo motor is mounted on the chassis via a fixed bracket. A transmission rod is installed on the servo motor. The transmission rod is fixed to the middle of the steering rod via screws. The end of the steering rod is connected to the front wheel via a steering cup.

[0019] In the aforementioned optimized four-wheel drive model vehicle, a circuit control board is installed on the chassis, and the circuit control board is connected to the motor, the servo motor and the clutch respectively through circuits.

[0020] Compared with existing technologies, this optimized four-wheel drive model car has the following advantages:

[0021] 1. Automatic differential adaptation: It incorporates a differential to provide mechanical automatic differential. The model car will automatically provide the optimal differential that matches the steering angle, which is superior to traditional four-wheeled model cars in both effect and ease of use.

[0022] 2. Increased braking capacity and reduced motor overheating: The newly added clutch braking system allows for faster vehicle deceleration, enabling quicker braking and deceleration. This reduces the load on the motor and alleviates overheating issues.

[0023] 3. Improve the acceleration and deceleration performance of the model car: The adoption of a reduction gear structure can provide a larger reduction ratio, thereby providing greater torque, making the acceleration and deceleration performance of the model car better, and improving the handling and stability of the model car.

[0024] 4. Improved stability at high speeds: The four-wheel drive system provides better acceleration and deceleration performance, improving the overall grip and stability of the model vehicle and preventing it from tipping over.

[0025] 5. Reduce software control burden: Using clutch braking to replace code control of motor braking, and using vehicle model adaptive differential to replace manual code control of differential, greatly reduces the code and debugging burden at the software level, while also achieving better results. Attached Figure Description

[0026] Figure 1 This is a 3D structural diagram of the optimized four-wheel drive model car.

[0027] Figure 2 This is a top-view structural diagram of this optimized four-wheel drive model car.

[0028] In the diagram: 1. Chassis; 2. Motor; 3. Motor gear; 4. Reduction gear set; 5. Main drive gear; 6. Main drive shaft; 7. Front drive gear; 8. Front differential gear; 9. Front differential; 10. Front axle; 11. Front wheel; 12. Rear drive gear; 13. Rear differential gear; 14. Rear differential; 15. Rear axle; 16. Rear wheel; 17. Clutch; 18. Clutch gear; 19. Encoder; 20. Encoding gear; 21. Servo; 22. Transmission linkage; 23. Steering linkage; 24. Steering cup; 25. Circuit control board. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] like Figure 1 and 2 As shown, this optimized four-wheel drive model car includes a chassis 1. Two front wheels 11 are connected to the chassis 1 via a front axle 10, and two rear wheels 16 are connected to the chassis 1 via a rear axle 15. A front differential 9 is fitted onto the front axle 10, and the front differential 9 has a front differential gear 8. A rear differential 14 is fitted onto the rear axle 15, and the rear differential 14 has a rear differential gear 13. A motor 2 is mounted on the chassis 1. The motor 2 drives the main drive shaft 6 to rotate via a transmission mechanism. A front transmission gear 7 is fixed at the front end of the main drive shaft 6 and meshes with the front differential gear 8. A rear transmission gear 12 is fixed at the rear end of the main drive shaft 6 and meshes with the rear differential gear 13.

[0031] The front differential gear 8, the rear differential gear 13, the front drive gear 7, and the rear drive gear 12 are all bevel gears; the front drive gear 7 and the front differential gear 8 form a transmission ratio one, and the rear drive gear 12 and the rear differential gear 13 form a transmission ratio two, and the transmission ratio one and the transmission ratio two are equal.

[0032] A bevel gear meshing transmission is used to change the transmission direction, and the rotational power of the main drive shaft 6 is used to vertically drive the rotation of the front wheel axle 10 and the rear wheel axle 15. At the same time, different mechanical differentials are applied to the front and rear wheels 16, which respectively drive the front wheel axle 10 and the rear wheel axle 15 to rotate, thereby driving the tires to rotate, thus realizing four-wheel drive and differential adaptive.

[0033] The transmission mechanism includes a motor gear 3 fixedly mounted on the shaft of motor 2, a reduction gear set 4 hinged on the chassis 1, and a main drive gear 5 fixedly mounted on the main drive shaft 6. The motor gear 3 meshes with the reduction gear set 4, and the reduction gear set 4 meshes with the main drive gear 5. When motor 2 is started, it drives the motor gear 3 to rotate, which in turn drives the reduction gear set 4 to rotate through gear meshing. After the reduction gear set 4 reduces the speed, it then drives the main drive gear 5 and the main drive shaft 6 to rotate.

[0034] The reduction gear set 4 includes a reduction shaft, with both ends mounted on the chassis 1 via bearing seats. Reduction gear one and reduction gear two are sleeved on the reduction shaft. Reduction gear one meshes with the motor gear 3, and reduction gear two meshes with the main drive gear 5. The number of teeth on reduction gear one and reduction gear two are unequal. By using two coaxial gears with different numbers of teeth to form the reduction gear set 4, which is driven by the motor gear 3 and subsequently drives the main drive gear 5, a large reduction ratio is achieved, increasing torque.

[0035] A clutch 17 is mounted on the chassis 1. A rotatable clutch shaft is mounted on the clutch 17, and a clutch gear 18 is fixedly mounted on the clutch shaft. The main drive gear 5 is meshed with the clutch gear 18. When braking is required, the 12V electromagnetic clutch 17 is energized. Electromagnetic induction generates a magnetic field. Under the action of the magnetic force, the internal spring plate deforms, fixing the clutch shaft of the clutch gear 18 and preventing further rotation of the clutch gear 18. This, in turn, prevents the main drive gear 5 from rotating, thus achieving braking.

[0036] An encoder 19 is mounted on the chassis 1. An input shaft is set on the encoder 19, and an encoding gear 20 is fixedly sleeved on the input shaft. The encoding gear 20 is meshed with the clutch gear 18. Under normal operation, the main drive gear 5 rotates, driving the clutch gear 18 and the encoding gear 20 to rotate. The encoding gear 20 drives the input shaft to rotate synchronously, inputting the speed into the encoder 19. The encoder 19 then reads the data and converts it into the vehicle's running speed.

[0037] A servo motor 21 is mounted on the chassis 1 via a fixed bracket. A transmission rod 22 is mounted on the servo motor 21. The transmission rod 22 is fixed to the middle of the steering rod 23 by screws. The end of the steering rod 23 is connected to the front wheel 11 via a steering cup 24. When the servo motor 21 is activated, it drives the transmission rod 22, which in turn moves the steering rod 23 left and right. The steering cup 24 then controls the angle of the left and right front wheels 11.

[0038] A circuit control board 25 is installed on the chassis 1. The circuit control board 25 is connected to the motor 2, the servo motor 21, and the clutch 17 via circuits. The circuit control board 25 controls the starter motor 2 to drive the vehicle; it controls the starter servo motor 21 to steer; and it controls the starter clutch 17 to brake the vehicle.

[0039] The driving method of this optimized four-wheel drive model car:

[0040] A start control signal is sent to the circuit control board 25. The circuit control board 25 electrically controls the starter motor 2, which drives the motor gear 3 to rotate. Through gear meshing, the gear set 4 is driven to rotate. After the speed is reduced by the gear set 4, it drives the main drive gear 5 and the main drive shaft 6 to rotate. The main drive shaft 6 synchronously drives the front drive gear 7 and the rear drive gear 12 at the end. The rear drive gear 12 is connected to the rear differential 14, which drives the two rear wheels 16 to rotate through the rear wheel axle 15. The front drive gear 7 is connected to the front differential 9, which drives the two front wheels 11 to rotate through the front wheel axle 10, thereby enabling the vehicle to travel in a straight line.

[0041] A steering control signal is sent to the circuit control board 25. The circuit control board 25 electrically activates the servo motor 21 to drive the transmission rod 22. The transmission rod 22 drives the steering rod 23 to move left and right, and then the steering cup 24 controls the angle of the left and right front wheels 11, thereby achieving vehicle steering. When turning, different mechanical differentials are applied to the left and right tires, thereby achieving four-wheel drive and differential adaptive control to prevent rollover.

[0042] A stop control signal is sent to the circuit control board 25, which energizes the electronically controlled start clutch 17. Electromagnetic induction generates a magnetic field. Under the action of the magnetic force, the internal spring plate deforms, fixing the clutch shaft of the clutch gear 18, thereby preventing the clutch gear 18 from continuing to rotate, and thus preventing the main drive gear 5 from rotating. Correspondingly, the front wheel axle 10 and the rear wheel axle 15 stop rotating, and the front wheel 11 and the rear wheel 16 stop rotating, thus achieving braking.

[0043] The specific embodiments described herein are merely illustrative examples of the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or substitute them with similar methods, without departing from the spirit of this invention or exceeding its defined scope. Although this invention has been detailed and described in the accompanying drawings and foregoing description, such descriptions are considered illustrative or exemplary rather than restrictive. It should be understood that changes and modifications can be made by those skilled in the art within the scope of the following claims. Specifically, this invention covers additional embodiments having any combination of features from the different embodiments described above. With regard to the use of the expressions "general" or "substantially," this patent application should be understood to disclose that the disclosure equally fully satisfies these features and values, i.e., without any of the foregoing characterizations as "general" or "substantially."

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An optimized four-wheel drive model car, comprising a chassis, wherein two front wheels are connected to the chassis via a front axle, and two rear wheels are connected to the chassis via a rear axle, characterized in that, A front differential is fitted onto the front axle, and the front differential has a front differential gear. A rear differential is fitted onto the rear axle, and the rear differential has a rear differential gear. A motor is mounted on the chassis, and the motor drives the main drive shaft in a rotary manner through a transmission mechanism. A front drive gear is fixed at the front end of the main drive shaft, and the front drive gear meshes with the front differential gear. A rear drive gear is fixed at the rear end of the main drive shaft, and the rear drive gear meshes with the rear differential gear.

2. The optimized four-wheel drive model car as described in claim 1, characterized in that, The front differential gear, the rear differential gear, the front drive gear, and the rear drive gear are all bevel gears; the front drive gear and the front differential gear form a transmission ratio one, and the rear drive gear and the rear differential gear form a transmission ratio two, wherein the transmission ratio one and the transmission ratio two are equal.

3. The optimized four-wheel drive model car as described in claim 1, characterized in that, The transmission mechanism includes a motor gear fixedly mounted on the motor shaft, a reduction gear set hinged on the chassis, a main drive gear fixedly mounted on the main drive shaft, the motor gear meshing with the reduction gear set, and the reduction gear set meshing with the main drive gear.

4. The optimized four-wheel drive model car as described in claim 3, characterized in that, The reduction gear set includes a reduction shaft, the two ends of which are mounted on the chassis via bearing seats. A first reduction gear and a second reduction gear are sleeved on the reduction shaft. The first reduction gear meshes with the motor gear, and the second reduction gear meshes with the main drive gear. The number of teeth on the first reduction gear and the second reduction gear are not equal.

5. The optimized four-wheel drive model car as described in claim 3, characterized in that, A clutch is mounted on the chassis, and a rotatable clutch shaft is provided on the clutch. A clutch gear is fixedly mounted on the clutch shaft, and the main drive gear is meshed with the clutch gear.

6. The optimized four-wheel drive model car as described in claim 5, characterized in that, An encoder is mounted on the chassis, an input shaft is provided on the encoder, an encoding gear is fixedly mounted on the input shaft, and the encoding gear is meshed with the clutch gear.

7. The optimized four-wheel drive model car as described in claim 5, characterized in that, The servo motor is mounted on the chassis via a fixed bracket. The servo motor is equipped with a transmission rod. The transmission rod is fixed to the middle of the steering rod by screws. The end of the steering rod is connected to the front wheel via a steering cup.

8. The optimized four-wheel drive model car as described in claim 7, characterized in that, A circuit control board is installed on the chassis, and the circuit control board is connected to the motor, the servo motor and the clutch through circuits.

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