CN110667711A

CN110667711A - Reduce braking distance and prevent car fin that knocks into back

Info

Publication number: CN110667711A
Application number: CN201910956843.1A
Authority: CN
Inventors: 黄国华
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-01-10

Abstract

The invention relates to the technical field of automobile empennages, and discloses an automobile empennage capable of reducing braking distance and preventing rear-end collision. When the automobile brakes, the inertia through the slider drives the fin to rotate a certain angle, so that the air flow speed is accelerated when passing through the lower part of the tail wing, according to the Bernoulli principle: the faster the fluid velocity, the lower the pressure. Therefore, the air flow speed below the tail wing is accelerated, the air pressure below the tail wing is reduced, the pressure difference between the upper edge and the lower edge of the tail wing is increased, the downward driving force applied to the tail wing is increased, and the downward pressure applied to the vehicle is increased.

Description

Reduce braking distance and prevent car fin that knocks into back

Technical Field

The invention relates to the technical field of automobile empennages, in particular to an automobile empennage capable of reducing braking distance and preventing rear-end collision.

Background

The automobile tail wing is a protrusion of a duck tail in a form arranged at the rear end of an automobile trunk cover, and belongs to a part of an automobile aerodynamic suite.

The automobile tail fin has the effects that when an automobile runs at a high speed, air resistance forms downward pressure, lift force is counteracted as much as possible, the downward pressure of airflow is effectively controlled, the wind resistance coefficient is correspondingly reduced, the high-speed running stability of the automobile is improved, and in the process of running at a high speed, the braking distance of the automobile is large, so that rear-end collision accidents are easily caused.

Disclosure of Invention

Technical scheme

In order to achieve the purpose of automatically adjusting and preventing rear-end collision, the invention provides the following technical scheme: the utility model provides a reduce braking distance and prevent tailgating automobile spoiler, includes vehicle body, the tire is installed to vehicle body's bottom, vehicle body's top right side fixed mounting has the fin support frame, the top fixed mounting of support frame has the fin, the inside fixedly connected with skeleton of fin, the fixed cover of right side fixedly connected with of skeleton, the inside fixedly connected with elastic spring of fixed cover, elastic spring's right side fixedly connected with slider, the bottom fixedly connected with rack of slider, the bottom of rack is provided with tooth, the right side of skeleton and the below fixedly connected with bracing piece that is located fixed cover, the positive swing joint of bracing piece has drive gear and runner, the right side fixedly connected with mount of runner, the bottom fixedly connected with fin of mount.

Preferably, the right side of the slider contacts the frame, so that the wing pieces are attached to the tail wing during normal driving of the vehicle.

Preferably, the transmission gear is meshed with teeth of the rack.

Preferably, the transmission gear is in meshed connection with the rotating wheel.

Preferably, the pitch circle diameter of the transmission gear is smaller than that of the rotating wheel, and the transmission ratio between the transmission gear and the rotating wheel is increased, so that the transmission gear can drive the rotating wheel to rotate only by small force, and the slider can overcome the resistance of air to the fin to enable the fin to rotate when the automobile is braked.

Preferably, the fins are adapted to the tail fin to aerodynamically improve the stability of the vehicle during travel.

Preferably, the elastic force of the elastic spring is larger than the sliding resistance of the slider, so that the wing piece is always kept in the state of being attached to the tail wing during normal use of the automobile.

Preferably, a certain distance is reserved between the rack (9) and the left side framework (5), and when the rack (9) is contacted with the left side framework (5), the wing (15) rotates to a specific angle.

Advantageous effects

Compared with the prior art, the invention provides the rear-end collision prevention automobile tail fin with the reduced braking distance, which has the following beneficial effects:

1. this reduce braking distance and prevent rear-end collision car fin, when the car brakes, the inertia through the slider drives the fin and rotates certain angle, makes the air velocity of flow accelerate when passing through the fin below, according to the Bernoulli principle: the faster the fluid velocity, the lower the pressure. Therefore, the air flow speed below the tail wing is accelerated, the air pressure below the tail wing is reduced, the pressure difference between the upper edge and the lower edge of the tail wing is increased, the downward driving force applied to the tail wing is increased, the downward pressure applied to the vehicle is increased, the friction factor between the tire and the ground is increased, and the effect of reducing the braking distance of the vehicle during high-speed running is achieved.

2. This reduce braking distance and prevent rear-end collision car fin, when the fin is rotatory when expanding, the air resistance that receives is bigger, the condition that the air is greater than the effort that the inertia of slider produced the fin to the resistance of fin can appear, lead to the fin can't expand, through the drive ratio between increase drive gear and the runner, make the slider to the fin under the unchangeable condition of acting, reduce drive gear and overcome the air resistance and drive the rotatory required power of runner, the inertia that makes the slider can overcome the air resistance and make the fin rotate, the car is when the brake has been improved, through adjusting the stability that the fin reduced the braking distance.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a flap closure arrangement of the present invention;

FIG. 3 is a schematic view of the opened configuration of the airfoil of the present invention;

FIG. 4 is a flow diagram of the flap closure airflow of the present invention;

FIG. 5 is a flow diagram of the airfoil opening air flow of the present invention.

In the figure: 1. a vehicle body; 2. a tire; 3. an empennage support frame; 4. a tail wing; 5. a framework; 6. fixing a sleeve; 7. an elastic spring; 8. a slider; 9. a rack; 10. teeth; 11. a support bar; 12. a transmission gear; 13. a rotating wheel; 14. a fixed mount; 15 fins.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a rear-end collision preventing automobile tail fin capable of reducing braking distance comprises a vehicle body 1, a tire 2 is mounted at the bottom of the vehicle body 1, a tail fin support frame 3 is fixedly mounted at the top right side of the vehicle body 1, a tail fin 4 is fixedly mounted at the top of the support frame, a framework 5 is fixedly connected to the temporal part of the tail fin 4, a fixing sleeve 6 is fixedly connected to the right side of the framework 5, an elastic spring 7 is fixedly connected to the inside of the fixing sleeve 6, a sliding block 8 is fixedly connected to the right side of the elastic spring 7, the elastic force of the elastic spring 7 is greater than the sliding resistance of the sliding block 8, so that when the automobile is in normal use, a fin 15 is always kept in a fit state with the tail fin 4, the right side of the sliding block 8 is in contact with the framework 5, the fin 15 is in fit with the tail fin 4 when, when the rack 9 is contacted with the left side framework 5, the fins 15 rotate to a specific angle, the bottom of the rack 9 is provided with teeth 10, the transmission gear 12 is meshed with the teeth 10 of the rack 9, the right side of the framework 5 is fixedly connected with a support rod 11 below the fixed sleeve 6, the front of the support rod 11 is movably connected with a transmission gear 12 and a rotating wheel 13, the reference circle diameter of the transmission gear 12 is smaller than the reference circle diameter of the rotating wheel 13, the transmission ratio between the transmission gear 12 and the rotating wheel 13 is increased, so that the transmission gear 12 can drive the rotating wheel 13 to rotate only with small force, when an automobile is braked, the sliding block 8 can overcome the resistance of air to the fins 15 to enable the fins 15 to rotate, the transmission gear 12 is meshed with the rotating wheel 13, the right side of the rotating wheel 13 is fixedly connected with a fixed frame 14, the bottom of the fixed frame 14 is, the stability of the automobile during driving is improved according to aerodynamics.

When the automobile runs at a high speed, the fins 15 on the automobile tail fin 4 are in a fit state with the tail fin 4, at the moment, the main function of the tail fin 4 is to counteract the lift force as much as possible, effectively control the down pressure of the airflow, correspondingly reduce the wind resistance coefficient and increase the high-speed running stability of the automobile.

When the automobile brakes, the slider 8 inside the fin 15 slides leftwards under the action of inertia generated when the automobile brakes, the slider 8 slides to drive the rack 9 to move leftwards, the rack 9 moves to drive the transmission gear 12 to rotate anticlockwise, the transmission gear 12 rotates to drive the rotating wheel 13 to rotate clockwise, the rotating wheel 13 rotates to drive the fin 15 to rotate clockwise, the fin 15 rotates a certain angle, when the rack 9 moves to contact with the framework 5, the fin 15 reaches the optimal adjusting angle, the fin 15 rotates to lead the air to accelerate the flow velocity when passing through the lower part of the tail fin 4, according to the Bernoulli principle: the faster the fluid velocity, the lower the pressure. Therefore, the air flow speed below the tail wing 4 is accelerated, the air pressure below the tail wing is reduced, the pressure difference between the upper edge and the lower edge of the tail wing 4 is increased, the downward driving force applied to the tail wing 4 is increased, the downward pressure applied to the vehicle is increased, the friction factor between the tire 2 and the ground is increased, and the effect of reducing the braking distance of the vehicle in high-speed running is achieved.

When the wing piece 15 is unfolded in a rotating mode, the air resistance is high, the situation that the resistance of air to the wing piece 15 is larger than the acting force of inertia of the sliding block 8 to the wing piece 15 can occur, the wing piece 15 cannot be unfolded, the force required by the transmission gear 12 for overcoming the air resistance to drive the rotating wheel 13 to rotate is reduced under the condition that the sliding block 8 does work on the wing piece 15 without changing by increasing the transmission ratio between the transmission gear 12 and the rotating wheel 13, the inertia of the sliding block 8 can overcome the air resistance to enable the wing piece 15 to rotate, and the stability of reducing the braking distance by adjusting the wing piece 15 when an automobile brakes is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a reduce braking distance and prevent rear-end collision car fin, includes vehicle body (1), its characterized in that: the automobile tail fin support is characterized in that a tire (2) is installed at the bottom of the automobile body (1), an empennage support frame (3) is fixedly installed on the top right side of the automobile body (1), an empennage (4) is fixedly installed at the top of the support frame, a framework (5) is fixedly connected inside the empennage (4), a fixed sleeve (6) is fixedly connected on the right side of the framework (5), an elastic spring (7) is fixedly connected inside the fixed sleeve (6), a slider (8) is fixedly connected on the right side of the elastic spring (7), a rack (9) is fixedly connected on the bottom of the slider (8), teeth (10) are arranged at the bottom of the rack (9), a support rod (11) is fixedly connected on the right side of the framework (5) and is positioned below the fixed sleeve (6), and a transmission gear (12) and a rotating wheel, the right side of runner (13) fixedly connected with mount (14), the bottom fixedly connected with fin (15) of mount (14).

2. The rear-end collision prevention car tail fin of claim 1, wherein: the right side of the sliding block (8) is in contact with the framework (5).

3. The rear-end collision prevention car tail fin of claim 1, wherein: the transmission gear (12) is meshed through the teeth (10) of the rack (9).

4. The rear-end collision prevention car tail fin of claim 1, wherein: the transmission gear (12) is meshed with the rotating wheel (13).

5. The rear-end collision prevention car tail fin of claim 1, wherein: the pitch circle diameter of the transmission gear (12) is smaller than that of the rotating wheel (13).

6. The rear-end collision prevention car tail fin of claim 1, wherein: the wings (15) are adapted to the tail (4).

7. The rear-end collision prevention car tail fin of claim 1, wherein: the elastic force of the elastic spring (7) is larger than the sliding resistance of the sliding block (8).

8. A car tail fin for reducing braking distance and preventing rear-end collision according to claim 1, wherein the rack (9) is spaced from the left side frame (5).