Optimized car body model and intelligent racing car

Abstract

The utility model provides an optimized car body model and an intelligent racing car, which comprise a chassis, a driving walking mechanism arranged at the rear end of the chassis, an auxiliary walking mechanism arranged at the front end of the chassis, a through hole formed in the middle of the chassis, a ventilation frame connected above the through hole, an air suction motor and air suction blades arranged in the ventilation frame, and the air suction motor drives the air suction blades to rotate. And an air suction duct is formed from the lower part of the chassis to the upper space through the ventilation frame. The hollow chassis is matched with the air suction structure to form the duct, air below the chassis is pumped out in the running process, the pressure below the chassis is reduced to form negative pressure, downward pressure is applied to the car model through the difference between the upper pressure and the lower pressure, and larger road holding force of the car model is achieved. Therefore, turning of the car model is more flexible, sideslip is not prone to occurring, and the running speed of the car model is greatly increased. And meanwhile, the hollow structure provides a heat dissipation channel, so that the heat dissipation space of the walking motor is greatly improved, and a good heat dissipation environment can enhance the running stability of the car model.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles and relates to a vehicle model, in particular to an optimized vehicle body model and an intelligent racing car. Background Art

[0002] The Smart Car Competition is a comprehensive competition that integrates multidisciplinary knowledge to design and solve practical or specific problems. It covers a wide range of professional fields, including automatic control, pattern recognition, sensor technology, electronics, computer science, and mechanical engineering, and possesses excellent teaching and research value. In the racing category, the competition requires the designed smart car to complete the race on a PVC track composed of various elements, including straights, roundabouts, curves, ramps, and obstacles, and return to the starting point. The current racing category mainly uses C-type car models.

[0003] Existing car models suffer from heavy weight, inflexible steering, and an irrational center of gravity. This makes them prone to tipping over when cornering, significantly limiting their speed. Furthermore, the motors in existing car models are typically placed in a fixed position, primarily behind the battery and below the circuit board. Surrounded by several supporting components, they are arranged in a nearly enclosed space, resulting in limited heat dissipation and insufficient stability during long-term operation. Existing car models also suffer from an overly complex structure, using a separate support plate to secure the rear wheel shaft, which is then topped with an L-shaped bracket with the circuit board placed above it. This results in lengthy disassembly and replacement of damaged components.

[0004] For example, Chinese patent document 201610185745.9 discloses a three-degree-of-freedom attitude control device, system, and method for a flying vehicle based on a ducted fan, comprising a ducted fan, a first servo, a bracket, a second servo, a chassis, and an integrated tail propeller driven wheel. The device comprises a ducted fan, a first servo, a bracket, a second servo, a chassis, and an integrated tail propeller driven wheel. The device comprises a first servo that drives the ducted fan to swing on a first axis, a second servo that drives the ducted fan to swing on a second axis, a bracket having a first hollow hole, a ducted fan disposed in the first hollow hole, a first servo disposed on the frame of the bracket, a chassis having a second hollow hole, and a bracket disposed in the second hollow hole, a second servo disposed on the chassis, and an integrated tail propeller driven wheel disposed at one end of the chassis. The integrated tail propeller driven wheel is capable of rotating along a third axis. In the present invention, the first servo controls the axis of the ducted fan to swing in a vertical plane in the forward direction of the vehicle body, and the second servo controls the axis of the ducted fan to swing in a plane perpendicular to the forward direction of the vehicle body, thereby achieving adjustment of two degrees of freedom.

[0005] The above technical solution provides a flying car that uses the thrust component of the ducted fan to correct the tilt of the car body, but it cannot solve the problem of low grip and easy rollover caused by the air pressure between the bottom of the car and the ground in a ground-based sports car. Utility Model Content

[0006] The purpose of this utility model is to address the above-mentioned problems in the existing technology and to propose an optimized vehicle body model and an intelligent racing car.

[0007] The purpose of the utility model can be achieved through the following technical solutions: an optimized vehicle body model, including a chassis, a driving walking mechanism is provided on the rear end of the chassis, an auxiliary walking mechanism is provided on the front end, a through opening is opened in the middle of the chassis, a ventilation rack is connected above the through opening, a suction motor and suction blades are provided inside the ventilation rack, the suction motor drives the suction blades to rotate, and a suction duct is formed from the bottom of the chassis through the ventilation rack to the upper space.

[0008] In the above-mentioned optimized vehicle body model, the opening of the chassis is specifically a circular hollow structure, the ventilation frame includes a cylindrical body, the cylindrical cavity of the cylindrical body is connected to the opening, a support frame is provided on the top side port of the cylindrical body, a hollow hole is formed between the support frame and the cylindrical cavity, the suction motor is provided in the cylindrical cavity of the cylindrical body, and the suction blades are fixedly connected to the driving shaft of the suction motor.

[0009] In the above-mentioned optimized vehicle body model, the bottom edge of the cylindrical body is turned outward to form a flange, and a plurality of mounting holes are provided on the flange. Bolts are passed through the mounting holes to secure the flange to the chassis.

[0010] In the above-mentioned optimized vehicle body model, a vertically inserted support rod is formed on the cylindrical body, and an adjustable fixed tee is provided on the support rod. The tee has a ferrule, an opening and closing mouth is provided on one side of the ferrule, and a mounting block is protruded on the other side. The ferrule is sleeved on the support rod, and the opening and closing mouth is locked by bolts. A support is hinged on the mounting block, and a camera is installed on the support.

[0011] In the above-mentioned optimized vehicle body model, the driving walking mechanism includes mounting side panels symmetrically arranged on both sides of the rear part of the chassis, a walking motor is installed on the inner wall surface of the mounting side panel, a driving gear is fixed on the rotating shaft of the walking motor, the rear wheel axle is hinged on the mounting side panel, the protruding end of the rear wheel axle is fixed with the driven gear and the driving tire from the inside to the outside in sequence, an encoder is fixed on the mounting side panel, an encoding gear is sleeved on the input shaft of the encoder, the driving gear engages with the driven gear, and the driven gear engages with the encoding gear.

[0012] In the above-mentioned optimized vehicle body model, a PCB bracket is fixedly installed on the rear part of the chassis. The PCB bracket is arranged between the mounting side panels on both sides. The PCB bracket includes a crossbeam, one side of which is fixedly connected to two support plates. The rear wheel axle is correspondingly connected to the support plates to form a rotational connection.

[0013] In the above-mentioned optimized vehicle body model, support plates are fixed on the top sides of both ends of the crossbeam, the two support plates are symmetrically arranged, and circuit boards are fixed on the two support plates.

[0014] In the above-mentioned optimized vehicle body model, the auxiliary walking mechanism includes a servo installed at the front of the chassis, the servo is connected to a steering rod, the two ends of the steering rod extend out of the two sides of the chassis respectively, and the end of the steering rod is sleeved on the driven tire.

[0015] In the above-mentioned optimized vehicle body model, the chassis is in the form of an elongated plate, and wings protrude from the middle of the elongated plate toward both sides.

[0016] An intelligent racing car comprises the above-mentioned optimized vehicle body model.

[0017] Compared with the existing technology, this optimized vehicle model and intelligent racing car have the following beneficial effects:

[0018] 1. The hollowed-out chassis and the air suction structure form ducts that draw air from beneath the chassis during driving. This reduces the pressure below the chassis, creating negative pressure. This pressure difference exerts downward force on the car model, giving it greater grip. This makes the car model more flexible in cornering, less prone to side slipping, and significantly increases its speed.

[0019] 2. The hollow structure of the chassis shortens the length of the car model, making the entire car model lighter and the center of gravity more concentrated, thereby enhancing the flexibility and stability of turning.

[0020] 3. The hollowed-out chassis structure changes the layout of components, placing the travel motor and encoder at the rear of the vehicle, optimizing gravity distribution. The hollowed-out structure also provides a heat dissipation channel, significantly increasing the heat dissipation space for the travel motor. This favorable heat dissipation environment enhances the vehicle's operational stability.

[0021] 4. A self-modeled PCB bracket was made, which can simultaneously support the rear wheel axle and fix the circuit board. It has a high degree of integration and is more convenient to disassemble and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the three-dimensional structure diagram of the optimized vehicle body model.

[0023] Figure 2 This is a top view of the optimized vehicle body model.

[0024] Figure 3 This is a bottom-up structural diagram of the optimized vehicle body model.

[0025] Figure 4 This is the three-dimensional structural diagram of the driving walking mechanism in this optimized vehicle body model.

[0026] Figure 5 This is a three-dimensional structural diagram of the PCB bracket in this optimized vehicle body model.

[0027] Figure 6 This is the physical three-dimensional structure diagram of the optimized vehicle body model.

[0028] Figure 7 This is a top-down structural diagram of the optimized vehicle body model.

[0029] In the figure, 1. chassis; 2. cylinder; 3. support frame; 4. suction motor; 5. suction blade; 6. support rod; 7. tee; 8. support; 9. camera; 10. mounting side panel; 11. travel motor; 12. drive gear; 13. rear wheel axle; 14. driven gear; 15. drive tire; 16. encoding gear; 17. encoder; 18. PCB bracket; 18a. crossbeam; 18b. support plate; 18c. pallet; 19. circuit board; 20. servo; 21. steering rod; 22. driven tire. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] like Figures 1 to 3 and Figure 6 、 7 As shown, the optimized vehicle body model includes a chassis 1, a driving walking mechanism is provided on the rear end of the chassis 1, an auxiliary walking mechanism is provided on the front end, a through opening is provided in the middle of the chassis 1, a ventilation rack is connected above the through opening, a suction motor 4 and a suction blade 5 are provided inside the ventilation rack, the suction motor 4 drives the suction blade 5 to rotate, and a suction duct is formed from the bottom of the chassis 1 through the ventilation rack to the upper space.

[0032] Preferably, the opening of the chassis 1 is specifically a circular hollow structure, the ventilation frame includes a cylindrical body 2, the cylindrical cavity of the cylindrical body 2 is connected to the opening, a support frame 3 is arranged on the top side port of the cylindrical body 2, a hollow hole is formed between the support frame 3 and the cylindrical cavity, a suction motor 4 is arranged in the cylindrical cavity of the cylindrical body 2, and a suction blade 5 is fixedly connected to the driving shaft of the suction motor 4.

[0033] The opening in chassis 1 connects the space below chassis 1 to the ventilation rack's cylindrical cavity. Holes formed in support frame 3 allow airflow to flow smoothly through the cylindrical cavity. Suction motor 4, a brushless sensorless motor, is screwed into the holes in the ventilation rack, with its drive shaft aligned with the central axis of the cylindrical cavity. Suction blades 5, a six-bladed propeller, are driven to rotate continuously in a directional manner, creating a continuous upward flow of air that creates a negative pressure space under the vehicle body.

[0034] like Figure 1 and 2 As shown, preferably, the bottom edge of the cylindrical body 2 is turned outward to form a flange, and a plurality of mounting holes are provided on the flange, and bolts are passed through the mounting holes to fix the flange on the chassis 1.

[0035] like Figure 1 and 2 As shown, preferably, a support rod 6 is vertically inserted on the cylindrical body 2, and a tee 7 can be adjusted and fixed on the support rod 6. The tee 7 has a sleeve, an opening and closing mouth is set on one side of the sleeve, and a mounting block is convexly provided on the other side. The sleeve is sleeved on the support rod 6, and the opening and closing mouth is locked by bolts. A support 8 is hinged on the mounting block, and a camera 9 is installed on the support 8.

[0036] The support rod 6 is specifically a carbon rod, and the tee 7 is specifically a nylon tee 7. A hole is provided in the front of the cylindrical body 2 to insert the support rod 6. By loosening the bolts, the ferrule can be moved along the support rod 6 to adjust the direction and angle of the camera 9. The camera 9 can be directed to shoot in all directions, front, back, left, and right of the chassis 1. The camera 9's elevation angle can be adjusted by rotating the support 8. This combination of various movement options allows for all-around shooting.

[0037] like Figure 1 and 4 As shown, preferably, the driving walking mechanism includes mounting side panels 10 symmetrically arranged on both sides of the rear side of the chassis 1, a walking motor 11 is installed on the inner wall surface of the mounting side panel 10, a driving gear 12 is fixedly sleeved on the rotating shaft of the walking motor 11, a rear wheel axle 13 is hinged on the mounting side panel 10, and the protruding end of the rear wheel axle 13 is fixedly sleeved on the driven gear 14 and the driving tire 15 from the inside to the outside, an encoder 17 is fixedly mounted on the mounting side panel 10, an encoding gear 16 is sleeved on the input shaft of the encoder 17, the driving gear 12 engages with the driven gear 14, and the driven gear 14 engages with the encoding gear 16.

[0038] The mounting side panels 10, travel motor 11, drive gear 12, driven gear 14, encoder gear 16, drive tire 15, and encoder 17 are symmetrically arranged in two sets. The travel motor 11 is a brushed 380 motor, and the encoder 17 is a 1024-line high-precision encoder. The drive gear 12 has a smaller diameter than the driven gear 14, which in turn has a larger diameter than the encoder gear 16.

[0039] Starting the travel motor 11 rotates the drive gear 12, which rotates the driven gear 14 through meshing transmission, and synchronously drives the drive tire 15 to rotate to achieve vehicle movement; the driven gear 14 rotates the encoding gear 16 through meshing transmission, and synchronously records the speed into the encoder 17.

[0040] like Figure 4 and 5As shown, preferably, a PCB bracket 18 is fixed to the rear of the chassis 1 and arranged between the two mounting side panels 10. The PCB bracket 18 includes a crossbeam 18a, one side of which is fixedly connected to two support plates 18b. The rear axle 13 is connected to the support plates 18b for rotation. The support plates 18b are fixed upright on the chassis 1, providing support for both the crossbeam 18a and the rear axle 13, thereby preventing eccentricity during rotation and improving stability.

[0041] Preferably, a support plate 18c is fixed on the top side of both ends of the crossbeam 18a, and the two support plates 18c are arranged symmetrically. The two support plates 18c are fixed with a circuit board 19. The circuit board 19 is fixed to the two support plates 18c by a number of screws and is mounted above the two rear wheel axles 13.

[0042] like Figure 1 and 2 As shown, the auxiliary travel mechanism preferably includes a steering gear 20 mounted on the front of the chassis 1. The steering gear 20 is connected to a steering rod 21. The ends of the steering rod 21 extend out of the sides of the chassis 1, and the ends of the steering rod 21 are connected to driven tires 22. The internal structure and steering principle of the steering gear 20 are both conventional and will not be described in detail here. The steering gear 20 is used to control the vehicle's forward movement.

[0043] Preferably, the chassis 1 is in the form of an elongated plate, with wings protruding from the middle of the elongated plate to both sides.

[0044] Example 2

[0045] Based on the first embodiment, the difference of this embodiment is that:

[0046] like Figure 6 and 7 As shown, an intelligent racing car includes the above-mentioned optimized vehicle body model.

[0047] The chassis 1 of this intelligent racing car is a 3D-printed model with a high degree of integration. The overall structure of the C-shaped car model has been improved by hollowing out the center of the chassis 1 and shortening its wheelbase. Ventilation racks and suction components have been added to the hollowed-out area to form a suction duct. This draws air from beneath the chassis 1, leveraging atmospheric pressure differences to achieve greater grip. This makes the car more agile in cornering, less prone to side slipping, and significantly increases its speed. Furthermore, the hollowing process not only reduces the overall weight of the car model but also centralizes its center of gravity.

[0048] The rear axle structure of the existing car model is improved, and the placement of the motor and encoder 17 is changed to the tail of the car model. At the same time, the chassis 1 under the motor is hollowed out, which greatly increases the heat dissipation area of ​​the motor and achieves better operating stability of the car model.

[0049] The L-shaped bracket used in existing car models has been replaced with a custom-designed PCB bracket 18. This structure eliminates the need for additional copper pillars and support plates 18b to secure the rear wheel shaft. Simply tightening the corresponding screws secures the rear wheel shaft and mounts the PCB 19, making disassembly easy. When installing the ventilation bracket, simply tighten four screws into the flange, making it easy to remove and replace.

[0050] The intelligent racing car uses a servo 20 for steering, a motor for driving the rear wheels, and a camera 9 for identifying and tracking the track.

[0051] Example 3

[0052] Different from the first embodiment, this embodiment includes the following improvements:

[0053] Alternative 1: Use centrally symmetrical double ducts to provide negative pressure.

[0054] Alternative solution 2: Leaving a hole at the rear of chassis 1 and installing a cooling fan can also solve the motor heating problem.

[0055] Alternative option three: Move the negative pressure fan from the center to the rear and place the battery forward to optimize the center of gravity of the vehicle.

[0056] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but will not deviate from the spirit of the present invention or exceed the defined scope. Although the present invention is described and described in detail in the drawings and the foregoing description, such illustrations and descriptions are considered to be illustrative or exemplary rather than restrictive. It should be understood that within the scope of the following claims, changes and modifications may be made by a person of ordinary skill. Specifically, the present invention covers additional embodiments having any combination of features from the different embodiments described above. Insofar as the expression "generally" or "substantially" is used, this patent application should be understood to disclose features and values ​​that are also fully satisfied, i.e., without the aforementioned characterization as "generally" or "substantially".

[0057] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. An optimized vehicle body model, comprising a chassis, a driving mechanism being provided on the rear end of the chassis and an auxiliary mechanism being provided on the front end, characterized in that: A through opening is opened in the middle of the chassis, and a ventilation rack is connected above the through opening. A suction motor and suction blades are arranged inside the ventilation rack. The suction motor drives the suction blades to rotate, forming a suction duct from the bottom of the chassis through the ventilation rack to the upper space.

2. The optimized vehicle body model according to claim 1, wherein: The opening of the chassis is specifically a circular hollow structure, and the ventilation frame includes a cylindrical body, the cylindrical cavity of the cylindrical body is connected to the opening, a support frame is provided on the top side port of the cylindrical body, and a hollow hole is formed between the support frame and the cylindrical cavity, the suction motor is provided in the cylindrical cavity of the cylindrical body, and the suction blades are fixedly connected to the driving shaft of the suction motor.

3. The optimized vehicle body model according to claim 2, wherein: The bottom edge of the cylinder is turned outward to form a flange, and a plurality of mounting holes are provided on the flange. Bolts are passed through the mounting holes to secure the flange to the chassis.

4. The optimized vehicle body model according to claim 2, wherein: The cylindrical body is provided with a vertically inserted support rod, and the support rod is adjustable and fixed with a tee, and the tee has a ferrule, an opening and closing mouth is provided on one side of the ferrule, and a mounting block is protruded on the other side, the ferrule is sleeved on the support rod, and the opening and closing mouth is locked by a bolt, and a support is hinged on the mounting block, and a camera is installed on the support.

5. The optimized vehicle body model according to claim 1, wherein: The driving walking mechanism includes mounting side plates symmetrically arranged on both sides of the rear part of the chassis, a walking motor is installed on the inner wall surface of the mounting side plate, a driving gear is fixedly sleeved on the rotating shaft of the walking motor, a rear wheel axle is hinged on the mounting side plate, and the protruding end of the rear wheel axle is fixedly sleeved on the driven gear and the driving tire from the inside to the outside, an encoder is fixedly installed on the mounting side plate, an encoding gear is sleeved on the input shaft of the encoder, the driving gear is engaged with the driven gear, and the driven gear is engaged with the encoding gear.

6. The optimized vehicle body model according to claim 5, wherein: A PCB bracket is fixedly installed on the rear part of the chassis and arranged between the mounting side plates on both sides. The PCB bracket includes a crossbeam, one side of which is fixedly connected to two support plates, and the rear wheel axle is correspondingly connected to the support plates to form a rotational connection.

7. The optimized vehicle body model according to claim 6, wherein: Support plates are fixed on the top sides of both ends of the beam, the two support plates are symmetrically arranged, and circuit boards are fixed on the two support plates.

8. The optimized vehicle body model according to claim 1, wherein: The auxiliary walking mechanism includes a steering engine installed at the front of the chassis, the steering engine is connected to a steering rod, two ends of the steering rod extend out of two sides of the chassis respectively, and the end of the steering rod is sleeved with a driven tire.

9. The optimized vehicle body model according to claim 1, wherein: The chassis is in the form of an elongated plate, with wings protruding from the middle of the elongated plate towards both sides.

10. An intelligent racing car, characterized in that: The method comprises the optimized vehicle body model according to any one of claims 1 to 9.

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