Passenger car active rear diffuser device

Abstract

The invention is applicable to the technical field of automobiles, and provides a passenger car active rear diffuser device which comprises a diffuser support, a translation part is slidably mounted at the bottom of the diffuser support, and a translation driving mechanism used for driving the translation part to slide along the bottom of the diffuser support is arranged on the diffuser support. A translation part is arranged on the base, the movement stroke of the translation part is 130 mm, a rotating part is hinged to the translation part through a hinge, an electric push rod used for adjusting the rotating angle of the rotating part is arranged on the translation part, and the electric push rod can drive the rotating part to rotate by 8.5 degrees along the axis of the hinge. The device is driven by a motor and an electric push rod, can be automatically started or manually started by a driver during high-speed driving and can be automatically retracted when the vehicle speed is reduced, the wind resistance coefficient of the vehicle is remarkably reduced during starting, oil consumption of the vehicle is reduced, the original overall size of the vehicle body can be kept during closing, the trafficability is improved, and the original modeling line attractiveness of the vehicle is kept.

Description

Technical Field

[0001] The invention belongs to the technical field of automobiles, and in particular relates to an active rear diffuser device for a passenger car. Background Art

[0002] The car diffuser is a crucial aerodynamic component, especially for racing cars (such as F1 racing cars). Installing a diffuser under the rear of the vehicle can increase the air flow rate under the body, optimize the rear flow field, generate downforce, and significantly improve the aerodynamic performance of the vehicle.

[0003] However, diffuser devices that can produce greater aerodynamic effects often lead to lower vehicle height, extended tail and poor departure angle, which will greatly reduce the vehicle's passability and destroy the integrity of the rear body styling curve. Therefore, they are mostly used in racing cars and are difficult to use on passenger cars. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide an active rear diffuser device for a passenger car, aiming to solve the problems raised in the above background technology.

[0005] An embodiment of the present invention is implemented as follows: an active rear diffuser device for a passenger car includes a diffuser bracket, a translation part is slidably installed at the bottom of the diffuser bracket, and a translation drive mechanism for driving the translation part to slide along the bottom of the diffuser bracket is provided on the diffuser bracket, and the movement stroke of the translation part is 130 mm, a rotating part is hinged on the translation part through a hinge, and an electric push rod for adjusting the rotation angle of the rotating part is provided on the translation part, and the electric push rod can drive the rotating part to rotate 8.5° along the axis of the hinge.

[0006] A further technical solution is that the translation drive mechanism includes a motor installed on the upper surface of the diffuser bracket, and a rack and a slide rail installed on the bottom surface of the diffuser bracket, a slider is installed on the slide rail, and the slider is connected to the translation part, a rotating shaft is also installed on the diffuser bracket, a first bevel gear is installed on the output end of the motor, a second bevel gear is installed on one end of the rotating shaft, and the second bevel gear and the first bevel gear are meshed with each other, a spur gear is also installed on the rotating shaft, and the spur gear is meshed with the rack, the rack is slidably installed on the bottom surface of the diffuser bracket, and the rack is also connected to the translation part.

[0007] According to a further technical solution, a cover plate is further provided on the translational part, the installation angle of the cover plate is the same as the initial angle of the rotational part, and the cover plate is provided with a hole that allows the electric push rod to pass through when moving.

[0008] According to a further technical solution, a motor shield is also installed on the diffuser bracket, and the motor is installed in the motor shield, which can protect the motor.

[0009] According to a further technical solution, the diffuser bracket is also provided with a connection structure connected to the vehicle body chassis, and the connection structure includes a plurality of reinforcing ribs.

[0010] An embodiment of the present invention provides an active rear diffuser device for a passenger car. The device is driven by a motor and an electric push rod. It can be opened automatically when driving at high speed or manually by the driver. It can be automatically retracted when the vehicle speed decreases. When opened, it will significantly reduce the vehicle's drag coefficient and reduce fuel consumption for the vehicle. When closed, it can maintain the original overall size of the vehicle body, improve passability, and maintain the original beautiful shape of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the installation position of an active rear diffuser device for a passenger vehicle provided by an embodiment of the present invention;

[0012] Figure 2 A schematic diagram of the overall structure of an active rear diffuser device for a passenger vehicle in a closed state provided by an embodiment of the present invention;

[0013] Figure 3 A schematic diagram of the overall structure of an active rear diffuser device for a passenger vehicle in an open state provided by an embodiment of the present invention;

[0014] Figure 4 A side view of an active rear diffuser device for a passenger vehicle in a closed state provided by an embodiment of the present invention;

[0015] Figure 5 A side view of an active rear diffuser device for a passenger vehicle in an open state provided by an embodiment of the present invention;

[0016] Figure 6 A top view of an active rear diffuser device for a passenger vehicle in a closed state provided by an embodiment of the present invention;

[0017] Figure 7 for Figure 6 AA section view in.

[0018] In the attached drawings: diffuser bracket 1; translation part 2; rotation part 3; motor shield 4; translation drive mechanism 5; motor 501; first bevel gear 502; second bevel gear 503; slide rail 504; slider 505; rack 506; spur gear 507; electric push rod 6; hinge 7; overall device 100; automobile 200. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0021] like Figure 1-7 As shown, an active rear diffuser device for a passenger car provided by an embodiment of the present invention comprises a diffuser bracket 1, a translation part 2 is slidably mounted on the bottom of the diffuser bracket 1, and a translation driving mechanism 5 for driving the translation part 2 to slide along the bottom of the diffuser bracket 1 is arranged on the diffuser bracket 1, and the movement stroke of the translation part 2 is 130 mm, a rotating part 3 is hinged on the translation part 2 through a hinge 7, and an electric push rod 6 for adjusting the rotation angle of the rotating part 3 is arranged on the translation part 2, and the electric push rod 6 can drive the rotating part 3 to rotate 8.5° along the axis of the hinge 7.

[0022] In the embodiment of the present invention, the device as a whole (in Figure 1 The diffuser bracket 1 is installed under the rear bumper of the automobile 200. Specifically, the diffuser bracket 1 is connected to the chassis at the rear of the automobile body by bolts to carry other parts and maintain the stability of the whole device. The device can adjust the position according to the driving mode selected by the driver in real time or automatically adjust the working position according to the vehicle speed, so as to adjust the shape and aerodynamic characteristics of the automobile body under different speeds and external conditions.

[0023] When the active rear diffuser of the passenger car changes from the closed state to the open state, the translation part 2 is driven by the translation drive mechanism 5 to move 130 mm toward the outside of the vehicle body in a direction parallel to the bottom surface of the diffuser bracket 1, and the rotation part 3 is driven by the electric push rod 6 to rotate 8.5° along the axis of the hinge 7 to reach the open state. When returning from the open state to the closed state, each component moves along the opposite path and returns to the closed state. After CFD simulation verification, after the diffuser translates 130 mm in the direction of movement and rotates 8.5°, the drag coefficient of the car has dropped significantly, the downforce obtained by the car body has also increased, and the aerodynamic performance has been greatly improved.

[0024] In short, the device can optimize the aerodynamic performance of the vehicle by extending outside the vehicle when the vehicle speed is high, so as to achieve the purpose of reducing energy consumption. At the same time, when the vehicle speed is low or the road conditions are bad, it can be retracted in time to ensure the passability and the integrity of the vehicle body shape, combining beauty and practicality.

[0025] like Figure 6 and 7As shown, as a preferred embodiment of the present invention, the translation drive mechanism 5 includes a motor 501 installed on the upper surface of the diffuser bracket 1, and a rack 506 and a slide rail 504 installed on the bottom surface of the diffuser bracket 1, a slider 505 is installed on the slide rail 504, and the slider 505 is connected to the translation part 2, and a rotating shaft is also installed on the diffuser bracket 1, a first bevel gear 502 is installed at the output end of the motor 501, a second bevel gear 503 is installed at one end of the rotating shaft, and the second bevel gear 503 and the first bevel gear 502 are meshed with each other, a spur gear 507 is also installed on the rotating shaft, and the spur gear 507 is meshed with the rack 506, the rack 506 is slidably installed on the bottom surface of the diffuser bracket 1, and the rack 506 is also connected to the translation part 2.

[0026] In the embodiment of the present invention, when in use, the motor 501 drives the first bevel gear 502 to rotate. Through the cooperation of the first bevel gear 502 and the second bevel gear 503, the motor 501 can drive the shaft to rotate synchronously, and the shaft drives the spur gear 507 to rotate, thereby driving the rack 506 to make a linear motion, which can drive the translation part 2 to translate at the bottom of the diffuser bracket 1. The cooperation of the slide rail 504 and the slider 505 can ensure the stability of the movement of the translation part 2.

[0027] like Figure 2 and 3 As shown, as a preferred embodiment of the present invention, both the translational portion 2 and the rotational portion 3 are designed with ear pieces for fixing the electric push rod 6, so that the electric push rod 6 can rotate around the axes of the two ear pieces when the length changes, thereby pushing the rotational portion 2 to rotate around the axis of the hinge 7.

[0028] like Figure 2-6 As shown, as a preferred embodiment of the present invention, a cover plate is also provided on the translation part 2, the installation angle of the cover plate is the same as the initial angle of the rotation part 3, and a hole is opened on the cover plate to allow the electric push rod 6 to pass through when moving, thereby ensuring the normal operation of the mechanism.

[0029] In the embodiment of the present invention, when the device moves toward the outside of the vehicle, a gap will be formed between the original position of the device and the vehicle body, which will cause turbulence and foreign matter to easily enter. Therefore, the cover plate on the translation part 2 can be used to fill the gap between the vehicle body and the device when the device is in the open state, and the cover plate can play a role in closing the vehicle body when the device reaches the open state.

[0030] like Figure 2 and 3 As shown, as a preferred embodiment of the present invention, a motor shield 4 is also installed on the diffuser bracket 1, and the motor 501 is installed in the motor shield 4, which can protect the motor 501.

[0031] In the embodiment of the present invention, the motor shield 4 and the motor 501 are both fixed to the diffuser bracket 1 by bolts.

[0032] As a preferred embodiment of the present invention, a connection structure connected to the vehicle chassis is provided on the diffuser bracket 1, and the connection structure includes a plurality of reinforcing ribs.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An active rear diffuser device for a passenger car, characterized in that: It includes a diffuser bracket, a translation part is slidably installed on the bottom of the diffuser bracket, and the diffuser bracket is provided with a translation drive mechanism for driving the translation part to slide along the bottom of the diffuser bracket, and the movement stroke of the translation part is 130mm, the translation part is hinged with a rotating part through a hinge, and the translation part is provided with an electric push rod for adjusting the rotation angle of the rotating part, and the electric push rod can drive the rotating part to rotate 8.5° along the axis of the hinge.

2. The active rear diffuser device for a passenger vehicle according to claim 1, characterized in that: The translation drive mechanism includes a motor installed on the upper surface of the diffuser bracket, and a rack and a slide rail installed on the bottom surface of the diffuser bracket, a slider is installed on the slide rail, and the slider is connected to the translation part, a rotating shaft is also installed on the diffuser bracket, a first bevel gear is installed on the output end of the motor, a second bevel gear is installed on one end of the rotating shaft, and the second bevel gear and the first bevel gear are meshed with each other, a spur gear is also installed on the rotating shaft, and the spur gear is meshed with the rack, the rack is slidably installed on the bottom surface of the diffuser bracket, and the rack is also connected to the translation part.

3. The active rear diffuser device for a passenger vehicle according to claim 1, characterized in that: The translation part is also provided with a cover plate, the installation angle of the cover plate is the same as the initial angle of the rotation part, and the cover plate is provided with a hole allowing the electric push rod to pass through when moving.

4. The active rear diffuser device for a passenger vehicle according to claim 2, characterized in that: A motor shield is also installed on the diffuser bracket, and the motor is installed in the motor shield.

5. The active rear diffuser device for a passenger vehicle according to claim 4, characterized in that: The motor shield and the motor are both fixed to the diffuser bracket by bolts.

6. The active rear diffuser device for a passenger vehicle according to claim 1, characterized in that: The diffuser bracket is also provided with a connection structure connected to the vehicle body chassis, and the connection structure includes a plurality of reinforcing ribs.

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