Variable rear spoiler system

Abstract

A variable rear spoiler system includes a spoiler body 1 and a driving assembly 2 connected to a vehicle body of a vehicle. The driving assembly 2 is connected to the spoiler body 1 to drive the spoil

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of rear spoilers, and in particular, to a variable rear spoiler system. BACKGROUND

[0002] An automobile rear spoiler is a protrusion which is like a ducktail and is mounted at a rear portion of a vehicle. The automobile rear spoiler is a part of an aerodynamic kit of the vehicle and has a main function is to reduce lift force at the rear portion of the vehicle and provide sufficient downforce for the vehicle, ensuring smooth driving. Angles of rear spoilers of many vehicles, such as sports cars and racing cars are adjustable. The angles of the rear spoilers are adjusted according to running states of the vehicles. The angle of the rear spoiler of this type of vehicle has at least two states. In a first state, the rear spoiler provides sufficient downforce for the vehicle that runs at a high speed, so that the vehicle can easily pass through a comer. However, the increase in the downforce also means an increase in the air resistance of the vehicle. Therefore, to increase a straight driving speed of the vehicle and reduce fuel consumption, it is necessary to adjust the rear spoiler to a second state to reduce the wind resistance and the downforce. However, the angle of this angle-adjustable rear spoiler is controlled by a mechanical element to instantly change. The rear spoiler acts alone and only changes the downforce at the rear wheels. After the angle of the rear spoiler changes, the proportion of the downforce at the front and rear wheels of the vehicle changes significantly. When a racing car running at a high speed enters a comer, if the rear spoiler cannot be adjusted from the second state to the first state due to a mechanical failure, the vehicle would pass through a comer at a high speed when the rear spoiler is in the second state. Due to the low downforce at the rear wheels of the vehicle, it is easy for the vehicle to lose control and drift. Moreover, due to the unbalanced front and rear pressures, the vehicle also easily loses control during braking, so that there is a high potential safety hazard. For example, there was a rear spoiler of a racing car Fl. If the racing car attempts to brake forcibly and enter a comer at a high speed due to a fault or the like while the rear spoiler is in the second state, the proportion of the pressure on the front and rear wheels will change a lot, resulting in the unbalanced front and rear pressures of the vehicle. As a result, the racing car loses control and drifts during the braking. Finally, the racing car loses the competition ability. SUMMARY

[0003] For the shortcomings in the prior art, the present disclosure aims to provide a variable rear spoiler system, so as to solve the following technical problems in the prior art: To change an angle of a rear spoiler, downforce at rear wheels of a vehicle is changed only, so that if the vehicle passes through a comer at a high speed when the rear spoiler is in a second state due to a mechanical failure or the like, the vehicle easily loses control and drifts because of a great change in the proportions of the front downforce and rear downforce; and the vehicle easily loses control because of unbalanced braking.

[0004] To solve the above technical problems, the present disclosure provides a variable rear spoiler system, including a rear spoiler body, and a driving assembly connected to a vehicle body of a vehicle, wherein the driving assembly is connected to the rear spoiler body and is configured to drive the rear spoiler body to move between a first position and a second position; the first position and the second position are both located outside the vehicle body of the vehicle; the first position and second position are both located on rear sides of rear wheels of the vehicle; the first position is located on a front upper side of the second position; and when the rear spoiler body moves from the first position to the second position, both downforce at a front wheel side and downforce at a rear wheel side decrease during running of the vehicle.

[0005] By use of the above structure, the variable rear spoiler system of the present disclosure has the following advantages: When the rear spoiler body is at the first position, high downforce is provided for the rear wheels of the vehicle, so that the vehicle can pass through a comer steadily; when the rear spoiler body is adjusted to the second position, the downforce of the rear spoiler decreases to reduce the running resistance of the vehicle, so that the vehicle can run straightly at a high speed; furthermore, when the rear spoiler body is adjusted to the second position, the downforce at the rear spoiler body decreases, but a horizontal distance between the rear spoiler body and the rear wheels of the vehicle increases, which is equivalent to an increase in an arm of force, so that the downforce at the front wheels decreases too according to the lever principle and in conjunction with the impact on the hydrodynamic force of the entire vehicle due to the position change of the rear spoiler body; namely, when the rear spoiler body is at the second position, the downforce at the rear wheels of the vehicle and the downforce at the front wheels of the vehicle both decrease, so that a ratio of the downforce at the front wheels to the downforce at the rear wheels changes little, namely, the proportions of the front downforce and the rear downforce remain close to the proportions at the first position; even if the vehicle passes through a comer at a high speed when the rear spoiler body is at the second position due to a mechanical failure or the like, the vehicle will not lose control and drift caused by a great change in the proportions of the front downforce and rear downforce; and the vehicle will not easily lose control because of unbalanced braking.

[0006] As an improvement, the driving assembly includes a driving member and a first connecting rod; the driving member includes a fixed portion and a telescopic rod; one end of the fixed portion is hinged to the vehicle body of the vehicle; one end of the telescopic rod is slidably connected to the other end of the fixed portion; the other end of the telescopic rod is hinged to the middle of the first connecting rod; an upper end of the first connecting rod is hinged to the rear spoiler body; and a lower end of the first connecting rod is hinged to the vehicle body of the vehicle. By use of this structure, the rear spoiler body is controlled by the first connecting rod and the driving member to change between the first position and the second position, the variable rear spoiler system has the advantage of simple structure.

[0007] As an improvement, the driving assembly further includes a second connecting rod; an upper end of the second connecting rod is hinged to the rear spoiler body; a lower end of the second connecting rod is hinged to the vehicle body of the vehicle; a connecting line from a hinge point between the upper end of the first connecting rod and the rear spoiler body to a hinge point between the upper end of the second connecting rod and the rear spoiler body is arranged in a horizontal direction; and a connecting line from a hinge point between the lower end of the second connecting rod and the vehicle body of the vehicle to a hinge point between the lower end of the first connecting rod and the vehicle body of the vehicle is arranged in a vertical direction. By use of this structure, the angle does not change as the position of the rear spoiler body changes through the additional arrangement of the second connecting rod.

[0008] As an improvement, the telescopic rod is located on a rear side of the fixed portion; the second connecting rod is located on a rear side of the first connecting rod; the hinge point between the upper end of the second connecting rod and the rear spoiler body is located on a rear side of the hinge point between the upper end of the first connecting rod and the rear spoiler body; and the hinge point between the lower end of the second connecting rod and the vehicle body of the vehicle is located on a lower side of the hinge point between the lower end of the first connecting rod and the vehicle body of the vehicle.

[0009] As an improvement, there are two second connecting rods arranged side by side; and a gap for allowing the first connecting rod to pass through is reserved between the two second connecting rods. By use of this structure, interference between the first connecting rod and the second connecting rod during rotation is prevented.

[0010] As an improvement, there are two groups of driving assemblies which are distributed in a lengthwise direction of the rear spoiler body. By use of this structure, the stability of the rear spoiler body when the driving assemblies drive the rear spoiler body to change the position is improved, and two sides of the rear spoiler body are unified.

[0011] As an improvement, two ends of the rear spoiler body in the lengthwise direction are connected to a rear spoiler end plate.

[0012] As an improvement, the driving assembly includes a driving member and a guide rail; the guide rail is connected to the vehicle body of the vehicle; the rear spoiler body is slidably connected to the guide rail; the driving member is connected to the vehicle body of the vehicle and is connected to the rear spoiler body; and the driving member drives the rear spoiler body to slide on the guide rail. By use of this structure, the driving member drives the rear spoiler body to slide on the guide rail, so that the rear spoiler body moves between the first position and the second position.

[0013] As an improvement, an included angle between the rear spoiler body and a horizontal plane remains constant throughout the movement of the rear spoiler body between the first position and the second position. In the present disclosure, the downforce can be changed without changing the angle of the rear spoiler body, so that the angle of the rear spoiler body remains unchanged in the position change process of the rear spoiler body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a schematic diagram of an overall structure when a rear spoiler body is at a first position and a second position in Embodiment I of the present disclosure.

[0015] FIG. 2 is a schematic diagram of an overall structure in Embodiment I of the present disclosure.

[0016] FIG. 3 is a schematic diagram of distribution of hydrodynamic force of an entire vehicle when a rear spoiler body is located at a first position in Embodiment I of the present disclosure.

[0017] FIG. 4 is a schematic diagram of distribution of hydrodynamic force of an entire vehicle when a rear spoiler body is located at a second position in Embodiment I of the present disclosure.

[0018] FIG. 5 is a schematic diagram of an overall structure in Embodiment II of the present disclosure.

[0019] Numerals in the accompanying drawings: 100: first position; 200: second position; 1: rear spoiler body; 2: driving assembly; 21: driving member; 211: fixed portion; 212: telescopic rod; 22: first connecting rod; 23: second connecting rod; 24: guide rail; 3: gap; and 4: rear spoiler end plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] A variable rear spoiler system of the present disclosure will be explained in detail below in conjunction with accompanying drawings.

[0021] Embodiment I:

[0022] As shown in FIG. 1 to FIG. 4, this embodiment provides a variable rear spoiler system, including a rear spoiler body 1, and a driving assembly 2 connected to a vehicle body of a vehicle; the driving assembly 2 is connected to the rear spoiler body 1 and is configured to drive the rear spoiler body 1 to move between a first position 100 and a second position 200; the first position 100 and the second position 200 are both located outside the vehicle body of the vehicle; the first position 100 and second position 200 are both located on rear sides of rear wheels of the vehicle; the first position 100 is located on a front upper side of the second position 200, namely, when the rear spoiler body 1 moves from the first position 100 to the second position 200, the rear spoiler body needs to move backwards and downwards simultaneously, or move backwards first and the move downwards; and when the rear spoiler body 1 moves from the first position 100 to the second position 200, both downforce at a front wheel side and downforce at a rear wheel side decrease during running of the vehicle.

[0023] As shown in FIG. 2, the driving assembly 2 includes a driving member 21, a first connecting rod 22, and a second connecting rod 23. The driving member 21 includes a fixed portion 211 and a telescopic rod 212. The driving member 21 is preferably a cylinder or an electric push rod. One end of the fixed portion 211 is hinged to the vehicle body of the vehicle; one end of the telescopic rod 212 is slidably connected to the other end of the fixed portion 211; the other end of the telescopic rod 212 is hinged to the middle of the first connecting rod 22; an upper end of the first connecting rod 22 is hinged to the rear spoiler body 1; and a lower end of the first connecting rod 22 is hinged to the vehicle body of the vehicle. An upper end of the second connecting rod 23 is hinged to the rear spoiler body 1; a lower end of the second connecting rod 23 is hinged to the vehicle body of the vehicle; a connecting line from a hinge point between the upper end of the first connecting rod 22 and the rear spoiler body 1 to a hinge point between the upper end of the second connecting rod 23 and the rear spoiler body 1 is arranged in a horizontal direction; and a connecting line from a hinge point between the lower end of the second connecting rod 23 and the vehicle body of the vehicle to a hinge point between the lower end of the first connecting rod 22 and the vehicle body of the vehicle is arranged in a vertical direction. The telescopic rod 212 is located on a rear side of the fixed portion 211; the second connecting rod 23 is located on a rear side of the first connecting rod 22; the hinge point between the upper end of the second connecting rod 23 and the rear spoiler body 1 is located on a rear side of the hinge point between the upper end of the first connecting rod 22 and the rear spoiler body 1; and the hinge point between the lower end of the second connecting rod 23 and the vehicle body of the vehicle is located on a lower side of the hinge point between the lower end of the first connecting rod 22 and the vehicle body of the vehicle. It should be noted that in this embodiment, the connecting line from the hinge point between the upper end of the first connecting rod 22 and the rear spoiler body 1 to the hinge point between the upper end of the second connecting rod 23 and the rear spoiler body 1 is arranged in the horizontal direction, which does not mean that the connecting line is completely horizontal. The connecting line allows that there is an included angle from the horizontal plane, as long as it ensures that the angle remains unchanged throughout the movement of the rear spoiler body 1 between the first position 100 and the second position 200. Similarly, the connecting line from the hinge point between the lower end of the second connecting rod 23 and the vehicle body of the vehicle to the hinge point between the lower end of the first connecting rod 22 and the vehicle body of the vehicle is arranged in the vertical direction, which does not mean that the connecting line is completely vertical. The connecting line allows that there is an included angle from a vertical plane, as long as it ensures that the angle remains unchanged throughout the movement of the rear spoiler body 1 between the first position 100 and the second position 200.

[0024] The driving assembly 2 in this embodiment is specifically as follows: A front end of the fixed portion 211 is hinged to the vehicle body of the vehicle, and the telescopic rod 212 is arranged at a rear end of the fixed portion 211. A rear end of the telescopic rod 212 is hinged to the middle of the first connecting rod 22. The upper end of the first connecting rod 22 is hinged to a bottom end of the rear spoiler body 1; the lower end of the first connecting rod 22 is hinged to the vehicle body of the vehicle; the hinge point between the lower end of the first connecting rod 22 and the vehicle body of the vehicle is located at a rear lower side of the hinge point between the fixed portion 211 and the vehicle body of the vehicle; the entire second connecting rod 23 is located on a rear lower side of the first connecting rod 22; the upper end of the second connecting rod 23 is hinged to the bottom end of the rear spoiler body 1; and the lower end of the second connecting rod 23 is hinged to the vehicle body of the vehicle. It should be noted that the driving assembly 2 in this embodiment using the connecting rods, which is only an implementation. By the arrangement of the connecting rods in different shapes and the connection structures in different forms, the rear spoiler body 1 can move between the first position 100 and the second position 200. The first connecting rod 22 and the second connecting rod 23 in this embodiment are both located on the lower side of the rear spoiler body 1. In some embodiments, the first connecting rod 22 and the second connecting rod 23 can be further arranged on the upper side of the rear spoiler body 1.

[0025] In addition, as shown in FIG. 2, in this embodiment, there are two second connecting rods 23 which are arranged side by side. The shapes of the two second connecting rods 23 are the same. A gap 3 for allowing the first connecting rod 22 to pass through is reserved between the two second connecting rods 23. Moreover, there are two groups of driving assemblies 2 which are distributed in a lengthwise direction of the rear spoiler body 1. The various structures in the two groups of driving assemblies 2 are the same, but the two driving members 21 are connected to different positions on the vehicle body of the vehicle. The two first connecting rods 22 are connected to different positions at a bottom end of the rear spoiler body 1, and the two second connecting rods 23 are connected to different positions at bottom end of the rear spoiler body 1. In addition, two ends of the rear spoiler body 1 in the lengthwise direction are connected to a rear spoiler end plate 4.

[0026] As shown in FIG. 3 and FIG. 4, when the rear spoiler body 1 is at the first position 100, high downforce is provided for the rear wheels of the vehicle, so that the vehicle can pass through a comer steadily; and when the rear spoiler body 1 is adjusted to the second position 200, the downforce of the rear spoiler decreases to reduce the running resistance of the vehicle, so that the vehicle can run straightly at a high speed. The included angle between the rear spoiler body 1 and the horizontal plane remains unchanged throughout the movement of rear spoiler body 1 between the first position 100 and the second position 200. When the rear spoiler body 1 is adjusted to the second position 200, the downforce at the rear spoiler body 1 decreases, but a horizontal distance between the rear spoiler body 1 and the rear wheels of the vehicle increases, which is equivalent to an increase in an arm of force, so that the downforce at the front wheels of the vehicle decreases too according to the lever principle and in conjunction with the impact on the hydrodynamic force of the entire vehicle due to the position change of the rear spoiler body 1; namely, when the rear spoiler body 1 is at the second position 200, the downforce at the rear wheels of the vehicle and the downforce at the front wheels of the vehicle both decrease, so that a ratio of the downforce at the front wheels to the downforce at the rear wheels changes little. Even if the vehicle passes through a comer at a high speed when the rear spoiler body 1 is at the second position 200 due to a mechanical failure or the like, the vehicle will not lose control and drift.

[0027] In the production design of the present disclosure, if the rear spoiler body 1 is adjusted from the first position 100 to the second position 200, the rear spoiler body 1 at the second position 200 reduces the downforce at the rear wheels of the vehicle and even the entire vehicle too little. The first connecting rod 22 and the second connecting rod 23 can be adjusted to make the rear spoiler body 1 located at a lower part of the second position 200, thereby further reducing the downforce at the rear wheels of the vehicle and even the entire vehicle when the rear spoiler body 1 is at the second position 200. If the rear spoiler body 1 is adjusted from the first position 100 to the second position 200, the rear spoiler body 1 at the second position 200 reduces the downforce at the front wheels of the vehicle to a very small extent, so that the ratio of the downforce at the front wheels to the downforce at the rear wheels changes a lot. The first connecting rod 22 and the second connecting rod 23 can be adjusted to make the rear spoiler body 1 close to the rear part of the second position 200, so as to increase the arm of force, thus further reducing the downforce at the front wheels of the vehicle. Through multiple adjustments, the ratio of the downforce at the front wheels to the downforce at the rear wheels changes little when the rear spoiler body 1 is adjusted from the first position 100 to the second position 200. A specific adjustment mode for the first connecting rod 22 and the second connecting rod 23 includes but is not limited to adjusting the relative positions of the hinge points between the first connecting rod 22, the second connecting rod 23, as well as the telescopic rod 212, and the rear spoiler body 1 and the vehicle body of the vehicle, lengths of the first connecting rod 22 and the second connecting rod 23, and the like.

[0028] The following table shows the various values of the rear spoiler body 1 in this embodiment at the first position 100 and the second position 200. From this table, it can be obtained that when the rear spoiler body 1 is at the first position 100, the high downforce iis provided for the vehicle. When the rear spoiler body 1 is adjusted to the second position 200, the downforce of the vehicle decreases to reduce the running resistance of the vehicle, and the ratio of the downforce at the front wheels to the downforce at the rear wheels changes little. Even if the vehicle passes through a comer at a high speed when the rear spoiler body 1 is at the second position 200 due to a mechanical failure or the like, the vehicle will not lose control and drift caused by a great change in the proportions of the front downforce and rear downforce; and the vehicle will not lose control because of unbalanced braking. In addition, as the hydrodynamic force of the entire vehicle changes, the present disclosure can not only be applied to different vehicle conditions such as turning and straight running of racing cars, but also to rally vehicles on different road conditions such as asphalt and gravel roads. Through this system, the overall downforce can be changed to better adapt to different road surfaces by changing the characteristics of the vehicle body. Overall Overall Rear spoiler Rear spoiler Rear spoiler Total Total Ratio of downforce / N wind angle / degree downforce / N wind downforce downforce the resistance / N resistance / N applied to applied to downforce the rear the front of the wheels / N wheels / N front wheels to the downforce of the rear wheels First 3309.4 1875 30 2567.6 225.4 2022 1287.4 0.637 position Second 3203 1694.5 30 2451 98 1937.2 1264.8 0.653 position

[0029] Embodiment II:

[0030] As shown in FIG. 5, this embodiment provides another variable rear spoiler system. A difference between this embodiment and Embodiment I is as follows: The driving assembly 2 includes a driving member 21 and a guide rail 24; the driving member 21 can use a cylinder or an electric push rod too; the guide rail 24 is connected to the vehicle body of the vehicle; the rear spoiler body 1 is slidably connected to the guide rail 24; the driving member 21 is connected to the vehicle body of the vehicle and is connected to the rear spoiler body 1; and the driving member 21 drives the rear spoiler body 1 to slide on the guide rail 24, so that the rear spoiler body 1 moves between the first position 100 and the second position 200.

[0031] The implementations of the present disclosure are explained in detail above in conjunction with the accompanying drawings, but the present disclosure is not limited to the above implementation. All other embodiments obtained by a person skilled in the art without creative work shall fall within the protection scope of the present disclosure. 23 04 25

Claims

1. A variable rear spoiler system, comprising a rear spoiler body (1), and a driving assembly (2) connected to a vehicle body of a vehicle, wherein the driving assembly (2) is connected to the rear spoiler body (1) and is configured to drive the rear spoiler body 5 (1) to move between a first position (100) and a second position (200); the first position(100) and the second position (200) are both located outside the vehicle body of the vehicle; the first position (100) and second position (200) are both located rearwards rear wheels of the vehicle; the first position (100) is located on a front upper side of the second position (200); and when the rear spoiler body (1) moves from the first position 10 (100) to the second position (200) without a change in vehicle speed, both downforce ata front wheel side and downforce at a rear wheel side decrease during running of the vehicle;wherein the driving assembly (2) comprises a driving member (21) and a first connecting rod (22); the driving member (21) comprises a fixed portion (211) and a 15 telescopic rod (212); one end of the fixed portion (211) is hinged to the vehicle body of the vehicle; one end of the telescopic rod (212) is slidably connected to the other end of the fixed portion (211); the other end of the telescopic rod (212) is hinged to the middle of the first connecting rod (22); an upper end of the first connecting rod (22) is hinged to the rear spoiler body (1); and a lower end of the first connecting rod (22) is hinged to 20 the vehicle body of the vehicle.

2. The variable rear spoiler system according to claim 1, wherein the driving assembly (2) further comprises a second connecting rod (23); an upper end of the second connecting rod (23) is hinged to the rear spoiler body (1); a lower end of the second 25 connecting rod (23) is hinged to the vehicle body of the vehicle; a connecting line from a hinge point between the upper end of the first connecting rod (22) and the rear spoiler body (1) to a hinge point between the upper end of the second connecting rod (23) and the rear spoiler body (1) is arranged in a horizontal direction; and a connecting line from a hinge point between the lower end of the second connecting rod (23) and the vehicle23 04 25body of the vehicle to a hinge point between the lower end of the first connecting rod (22) and the vehicle body of the vehicle is arranged in a vertical direction.

3. The variable rear spoiler system according to claim 2, wherein the telescopic rod (212) 5 is located on a rear side of the fixed portion (211); the second connecting rod (23) is located on a rear side of the first connecting rod (22); the hinge point between the upper end of the second connecting rod (23) and the rear spoiler body (1) is located on a rear side of the hinge point between the upper end of the first connecting rod (22) and the rear spoiler body (1); and the hinge point between the lower end of the second 10 connecting rod (23) and the vehicle body of the vehicle is located on a lower side of the hinge point between the lower end of the first connecting rod (22) and the vehicle body of the vehicle.

4. The variable rear spoiler system according to claim 2, wherein there are two second 15 connecting rods (23) arranged side by side; and there is a gap (3) between the two second connecting rods (23) for allowing the first connecting rod (22) to pass through.

5. The variable rear spoiler system according to claim 1, wherein there are two groups of driving assemblies (2) which are distributed in a lengthwise direction of the rear 20 spoiler body (1).

6. The variable rear spoiler system according to claim 1, wherein each end of the rear spoiler body (1) in the lengthwise direction is connected to a respective rear spoiler end plate (4).

257. The variable rear spoiler system according to claim 1, wherein the driving assembly (2) comprises a driving member (21) and a guide mil (24); the guide rail (24) is connected to the vehicle body of the vehicle; the rear spoiler body (1) is slidably connected to the guide rail (24); the driving member (21) is connected to the vehiclebody of the vehicle and is connected to the rear spoiler body (1); and the driving member (21) drives the rear spoiler body (1) to slide on the guide rail (24).23 04 25

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