Spoiler for a motor vehicle

Abstract

Spoilers, especially rear spoilers, for a motor vehicle, with a spoiler body (14) for deflecting an airflow to provide an aerodynamic effect and an actuating kinematic (32) for relocating the spoiler body (14) between a storage position and a usage position, wherein the spoiler body (14) has a main spoiler (16) and an auxiliary spoiler (20) which is movable relative to the main spoiler (16) by means of the actuating kinematics (32) and the spoiler body (14) in the usable position has a larger flowable surface (28) provided by the main spoiler (16) and the auxiliary spoiler (20) than in the stowed position characterized by the fact that the actuating kinematics (32) includes a scissor mechanism (34) for displacing the spoiler body (14), wherein the scissor mechanism (34) includes a connecting link (44) for pivoting the spoiler body (14), where either the main spoiler (16) is connected to the scissor mechanism (34) past the connecting link (44), while the auxiliary spoiler (20) is directly connected to the connecting link (44), or the auxiliary spoiler (20) is connected to the scissor mechanism (34) past the connecting link (44), while the main spoiler (16) is directly connected to the connecting link (44).

Description

[0001] The invention relates to a spoiler, in particular a rear spoiler, for a motor vehicle, with the aid of which an aerodynamic effect, for example an increase in contact pressure by deflecting the airstream, can be provided.

[0002] From DE 40 14 380 A1 a spoiler with a spoiler body is known which can be displaced by means of a multi-joint actuating kinematics between a storage position in which the spoiler body is inserted in an upper side of a motor vehicle body and a use position in which the spoiler body provides an aerodynamic effect.

[0003] From DE 100 025 511 A1 a spoiler of a motor vehicle is known which can be extended from a storage position into a use position by means of a lifting piston rod and a coupling rod whose length is adjustable by a gas pressure spring, in which in the extended use position an auxiliary spoiler can be extended from the remaining spoiler in order to increase the surface area on which the air can pass by by means of a link mechanism connected to the gas pressure spring.

[0004] There is a constant need to improve the aerodynamic effect of a spoiler through easily implemented design measures.

[0005] The object of the invention is to show measures that enable a structurally simple spoiler with a good aerodynamic effect.

[0006] The object is achieved according to the invention by a spoiler having the features of claim 1. Preferred embodiments of the invention are specified in the subclaims, which may each individually or in combination represent an aspect of the invention.

[0007] According to the invention, a spoiler, in particular a rear spoiler, is provided for a motor vehicle, comprising a spoiler body for deflecting an air flow to provide an aerodynamic effect and an actuating kinematics for displacing the spoiler body between a storage position and a use position, wherein the spoiler body has a main spoiler and an auxiliary spoiler movable relative to the main spoiler with the aid of the actuating kinematics, and the spoiler body in the use position has a larger surface area provided by the main spoiler and the auxiliary spoiler than in the storage position, wherein the actuating kinematics comprises a scissor mechanism for displacing the spoiler body, wherein the scissor mechanism has a connecting link for pivoting the spoiler body, wherein either the main spoiler is connected to the scissor mechanism past the connecting link,while the auxiliary spoiler is directly connected to the connecting link, or the auxiliary spoiler is connected to the scissor mechanism past the connecting link, while the main spoiler is directly connected to the connecting link.

[0008] In the storage position, the spoiler body can be lowered into a motor vehicle body and form part of the upper side of the motor vehicle body, which faces outwards from a passenger compartment. In the use position, the spoiler can provide an aerodynamic effect, for example increasing the contact pressure of the motor vehicle on a ground by deflecting a headwind away from the ground. However, since the spoiler body is not designed as a single piece but rather as at least two pieces, it is possible to form a particularly large surface area of ​​the spoiler body onto which the headwind can flow from a plurality of parts that can be moved relative to one another, so that a correspondingly stronger aerodynamic effect can be achieved in the use position compared to the freely accessible surface of the spoiler body in the storage position.In addition, the relative movement of the main spoiler to the auxiliary spoiler can be achieved by the actuating kinematics already provided for extending and / or retracting the spoiler body between the storage position and the use position, so that it is not necessary to provide a separate drive, such as an electrically operated servomotor, for the relative movement of the main spoiler to the auxiliary spoiler. This minimizes the design effort for the spoiler. The increased airflow surface of the spoiler body achievable with the aid of the actuating kinematics enables a structurally simple spoiler with a good aerodynamic effect.

[0009] The connecting link can be a link provided at an end of the scissor mechanism facing the spoiler body, which extends beyond a pivot bearing provided at this end, so that the spoiler body is connected to the scissor mechanism at a distance from this pivot bearing. This allows the spoiler body to be pivoted about this pivot bearing from the connecting link. The scissor mechanism can be provided with crosswise links that are connected at their intersection points via a pivot bearing.

[0010] The actuating kinematics can, for example, comprise a linkage with interconnected links, wherein the actuating kinematics is particularly designed as a seven-joint linkage with seven spherical bearings. The actuating kinematics can comprise a drive linkage that can be displaced and / or rotated by a drive unit in order to displace and, if necessary, rotate the spoiler body between the storage position and the use position. In particular, the actuating kinematics can also be used to approach intermediate positions between the storage position and the use position, whereby an increase in the airflow surface of the spoiler body can be achieved even in the intermediate positions.

[0011] The main spoiler and the auxiliary spoiler can each have a surface, wherein at least less than the entire surface of the main spoiler or the auxiliary spoiler can be exposed to airflow in the stowed position. In the stowed position, a portion of the surface can be covered. In the use position, at least a portion of the previously covered surface, preferably the entire covered surface, can be exposed and exposed to airflow. In particular, the main spoiler has a larger airflow surface in the use position than the auxiliary spoiler.

[0012] In particular, the spoiler body in the use position has a greater extension in the direction of travel provided by the main spoiler and the auxiliary spoiler than in the stowed position. The main spoiler and the auxiliary spoiler can be displaced relative to each other along or against the direction of travel during a movement from the stowed position to the use position, so that the distance over which the airflow flows along the spoiler body can be increased.

[0013] The main spoiler is preferably guided so as to be displaceable relative to the auxiliary spoiler, in particular via a linear guide. The linear guide can ensure that the distance between the main spoiler and the auxiliary spoiler does not increase or that the main spoiler does not strike the auxiliary spoiler and possibly block further movement. The relative movement of the main spoiler to the auxiliary spoiler can be positively guided via the linear guide. This makes it possible, for example, to link a link arm of the actuating kinematics via an elongated hole on the main spoiler and / or the auxiliary spoiler, wherein only the movement component of the link arm extension along the linear guide is converted into a relative movement of the main spoiler to the auxiliary spoiler, and a movement component transverse to the linear guide can be compensated for by moving a bolt engaging in the elongated hole.This allows, in particular, a pivoting movement of the handlebar extension to be converted into a linear movement of the main spoiler to the auxiliary spoiler.

[0014] Particularly preferably, either the main spoiler or the auxiliary spoiler is articulated to the actuating kinematics via an additional coupling link, wherein the main spoiler can be moved relative to the auxiliary spoiler with the aid of the coupling link when the spoiler body moves between the storage position and the use position. The main spoiler or the auxiliary spoiler can be connected to the actuating kinematics via a spherical bearing using the coupling link, whereby it is possible to avoid a bolt guided in an elongated hole. The coupling link can in particular be connected to a link of the actuating kinematics or to a link extension of a link of the actuating kinematics in such a way that the coupling link is spaced from the main spoiler and the auxiliary spoiler during a pivoting movement of the link when the spoiler body moves between the storage position and the use position.In particular, the coupling link is always positioned below the spoiler body, so that the coupling link cannot strike the main spoiler or the auxiliary spoiler and / or protrude from the spoiler body. It is possible for both the main spoiler and the auxiliary spoiler to be connected to the actuating kinematics, which is particularly designed as a seven-bar linkage, via their own coupling link. Preferably, either only the main spoiler or only the auxiliary spoiler is linked to the actuating kinematics via the coupling link.

[0015] In particular, the main spoiler or auxiliary spoiler, which is articulated to the actuating kinematics via the coupling link, is at a greater distance from a motor vehicle body in the use position than the auxiliary spoiler or main spoiler, which is articulated past the coupling link and past the actuating kinematics. The main spoiler or auxiliary spoiler, which is driven by the coupling link, can be moved away from the motor vehicle body during a movement from the storage position to the use position, so that the spoiler body cannot strike the motor vehicle body in the use position. In the case of a spoiler designed as a rear spoiler, the main spoiler or auxiliary spoiler, which is driven by the coupling link, can be moved away from the motor vehicle body opposite to the direction of travel during a movement from the storage position to the use position.

[0016] Particularly preferably, in the use position, a first link of the actuating kinematics strikes a second link via an end-position stop. When the spoiler body moves from the storage position to the use position, the first link and the second link of the actuating kinematics can move relative to one another. In this case, a part of the first link can be moved towards a part of the second link. When the maximum extended use position of the spoiler body is reached, the first link strikes the end-position stop, which is attached in particular to the second link, so that further movement is blocked. The end-position stop comprises in particular an elastic, in particular rubber-elastic, material that dampens the impact of the first link when it strikes and prevents unnecessary noise. Excessive movement of the spoiler body beyond the use position into an aerodynamically less favorable position is thus avoided.

[0017] In particular, in the deployed position, the main spoiler contacts the auxiliary spoiler, particularly via a sealing lip. This can at least reduce the gap between the auxiliary spoiler and the main spoiler, through which some of the airflow can escape. Instead, it is possible for a dead zone to form in the transition area between the auxiliary spoiler and the main spoiler, along which the airflow can flow with minimal flow resistance without the flow breaking away from the spoiler body.

[0018] Preferably, in the stowed position, the auxiliary spoiler is positioned substantially completely below the main spoiler in the direction of gravity. The auxiliary spoiler can be completely covered by the main spoiler, so that the installation space required for a cutout in the vehicle body to accommodate the spoiler body in the stowed position is essentially determined solely by the geometry of the main spoiler. The spoiler body can thus be accommodated by the vehicle body in the stowed position in a particularly compact and space-saving manner.

[0019] The invention further relates to a motor vehicle with a motor vehicle body, wherein the motor vehicle body has an air-permeable upper surface facing away from an interior, and a spoiler hinged to the motor vehicle body, which spoiler can be designed and developed as described above, wherein the air-permeable surface of the spoiler body is integrated into the shape of the upper side of the motor vehicle body in the stowed position. The enlarged air-permeable surface of the spoiler body, achievable with the aid of the actuation kinematics, enables a structurally simple spoiler with a good aerodynamic effect.

[0020] The invention will be explained below by way of example with reference to the accompanying drawings using preferred embodiments, wherein the features presented below can represent an aspect of the invention both individually and in combination. They show: Fig. 1: a schematic side view of a spoiler in a storage position, Fig. 2: a schematic side view of the spoiler from Fig. 1 in a use position and Fig. 3: a schematic exploded view of the spoiler from Fig. 1.

[0021] The Fig. 1, a spoiler 10 configured as a rear spoiler is recessed into a motor vehicle body 12 of a motor vehicle. The spoiler 10 has a spoiler body 14, which has an upper main spoiler 16 and an auxiliary spoiler 20 that is displaceable relative to the main spoiler 16 via a linear guide 18. The linear guide 18 has a guide rail 22 connected to the auxiliary spoiler 20, in which a slider 24 connected to the main spoiler 16 is inserted so as to be linearly movable essentially along a direction of travel 26 of the motor vehicle. The spoiler body 14 has an outwardly facing airflow surface 28, which in the Fig. 1 is formed exclusively by the surface of the main spoiler 16, while the auxiliary spoiler 20 is positioned entirely below the main spoiler 16. In the storage position, the surface 28 of the spoiler body 14 can be integrated into the shape of an outer side 30 pointing outward from a passenger compartment of the motor vehicle.

[0022] The spoiler body 14 is connected to an actuation kinematics 32, with the aid of which the spoiler body 14 is moved from the Fig. 1 shown storage position into the Fig. 2 shown in the use position. In the illustrated embodiment, the actuating kinematics 32 is designed as a seven-bar linkage, in which a scissors mechanism 34 can be actuated with the aid of a drive link 36 that can be displaced and / or pivoted by means of a drive unit. The scissors mechanism 34 has a guide link 36 articulated to the motor vehicle and a first connecting link 38 articulated to the drive link 36, wherein the guide link 36 and the first connecting link 38 intersect and are articulated to one another at the intersection point via a lower scissors joint 40. Above the lower scissors joint 40, a second connecting link 42 is articulated to the first connecting link 38, while a connecting link 44 is articulated to the guide link 36.The second connecting link 38 and the connecting link 44 are in turn connected to each other via an upper scissor joint 46.

[0023] The connecting link 44 extends beyond the upper scissor joint 46 far enough that the auxiliary spoiler 20 can be firmly connected to the connecting link 44. The second connecting link 42 has a link extension 48 projecting beyond the upper scissor joint 46, to which a coupling link 50 is articulated. The coupling link 50 is additionally connected to the main spoiler 16 via a fastening projection 52. When the scissor mechanism 34 is actuated, the coupling link 50 can be pivoted about the upper scissor joint 46 by the link extension 42 of the second connecting link 42, whereby the coupling link 50 can move the main spoiler 16 along the linear guide 18 along or against the direction of travel 26 relative to the auxiliary spoiler 20.

[0024] In the illustrated embodiment, the guide link 36 has an end position stopper 54, against which the first connecting link 38 can strike in a damped manner in the use position.

[0025] As in Fig. As shown in Figure 3, the actuating kinematics 32 and / or the linear guide 18 are provided in multiple units, preferably in pairs. Furthermore, the main spoiler 16 can be designed in multiple parts and, for example, be composed of an upper shell 56 and a lower shell 58.

Claims

[1] Spoiler, in particular rear spoiler, for a motor vehicle, with a spoiler body (14) for deflecting an air flow to provide an aerodynamic effect and an actuating kinematics (32) for displacing the spoiler body (14) between a storage position and a use position, wherein the spoiler body (14) has a main spoiler (16) and an auxiliary spoiler (20) movable relative to the main spoiler (16) by means of the actuating kinematics (32), and the spoiler body (14) has a larger surface area (28) provided by the main spoiler (16) and the auxiliary spoiler (20) in the use position than in the storage position characterized by , that the actuating kinematics (32) has a scissor mechanism (34) for displacing the spoiler body (14), wherein the scissor mechanism (34) has a connecting link (44) for pivoting the spoiler body (14), where either the main spoiler (16) is connected to the scissor mechanism (34) past the connecting link (44), while the auxiliary spoiler (20) is connected directly to the connecting link (44), or the auxiliary spoiler (20) is connected to the scissor mechanism (34) past the connecting link (44), while the main spoiler (16) is connected directly to the connecting link (44). [2] Spoiler according to claim 1 characterized by that the spoiler body (14) in the use position has a greater extension in the direction of travel (26) provided by the main spoiler (16) and the auxiliary spoiler (20) than in the storage position. [3] Spoiler according to claim 1 or 2 characterized by that the main spoiler (16) is guided displaceably relative to the auxiliary spoiler (20), in particular via a linear guide (18). [4] Spoiler according to one of claims 1 to 3 characterized bythat either the main spoiler (16) or the auxiliary spoiler (20) is articulated to the actuating kinematics (32) via an additional coupling link (50), wherein with the aid of the coupling link (50) the main spoiler (16) can be moved relative to the auxiliary spoiler (20) when the spoiler body (14) moves between the storage position and the use position. [5] Spoiler according to claim 4 characterized by that the main spoiler (16) or auxiliary spoiler (20) articulated via the coupling link (50) to the actuating kinematics (32) has a greater distance from a motor vehicle body in the use position than the auxiliary spoiler (20) or main spoiler (16) articulated past the coupling link (50) to the actuating kinematics (32). [6] Spoiler according to one of claims 1 to 5 characterized by that in the use position a first link of the actuating kinematics strikes a second link via an end position stop (54). [7] Spoiler according to one of claims 1 to 6 characterized by that in the use position the main spoiler (16) contacts the auxiliary spoiler (20), in particular via a sealing lip. [8] Spoiler according to one of claims 1 to 7 characterized by that in the storage position the auxiliary spoiler (20) is positioned substantially completely in the direction of gravity below the main spoiler (16). [9] Motor vehicle with a motor vehicle body (12), wherein the motor vehicle body (12) has a top side (30) facing away from an interior, and a spoiler (10) hinged to the motor vehicle body (12) according to one of claims 1 to 8, wherein the surface (28) of the spoiler body (14) capable of being blown onto the top side (30) of the motor vehicle body (12) is integrated into the shape of the top side (30) of the motor vehicle body (12) in the storage position.

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