CN104890742B - Locating part for air dam, air dam device and vehicle - Google Patents

Abstract

The invention relates to a limiting piece for an air dam, an air dam device and a vehicle, wherein the limiting piece for the air dam comprises a limiting support, a main supporting arm is arranged on the limiting support, the main supporting arm is provided with a deformation end capable of elastically deforming in the inner and outer directions, a clamping groove with a rightward notch is arranged on the deformation end of the main supporting arm and used for being clamped with the air dam when the air dam is in an unfolded position, and the clamping groove is provided with a front side groove wall and a rear side groove wall which are pushed by the air dam when the air dam swings from front to back or from back to front so that the clamping groove moves towards the left along with the deformation end. The invention provides a limiting piece for an air dam, an air dam device using the limiting piece and a vehicle, wherein the limiting piece for the air dam can improve the stability of the air dam in an unfolding position.

Description

Stopper for air dam, air dam device and vehicle

technical field

The invention relates to a spacer for an air dam, an air dam device and a vehicle.

Background technique

In order to improve the combustion efficiency of fuel during high-speed operation, some motor vehicles use an air dam device installed under the front of the vehicle. The outflow avoids the high-speed airflow directly impacting the chassis to reduce the formation of vortices, and improves the aerodynamic resistance of the vehicle at high speed, so it can improve the fuel economy of the vehicle at high speed.

The effect of the air dam on reducing air resistance is more obvious when the vehicle is running at high speed, but less effective at low speed. At the same time, the air dam is installed at the lower part of the vehicle and is easily damaged when it encounters road obstacles. Therefore, it is necessary for the air dam to be able to change its working state in real time To adapt to different vehicle speeds and road conditions. The existing air dam device that can change its working state in real time, such as the "passive deployable air dam for vehicles" disclosed in Chinese patent CN102139671A, includes an air dam that is hinged at the bottom of the front trim panel of the vehicle. The hinge axis is extended along the left and right, that is, the inner and outer directions. A structural beam is arranged at the rear end of the front decorative panel, and a coil spring is arranged between the front decorative panel and the air dam. The air dam has a stowed position and an unfolded position during rotation. The spring can keep the air dam in the retracted position. When the vehicle speed is high enough to reach the activation speed, the air dam can be turned over to the unfolded position by the direct impact of the airflow. When the vehicle speed decreases, the coil spring pulls the air dam to the retracted position again. In the starting position, when the air dam encounters an obstacle in the unfolded position, it can be further flipped backwards to avoid the obstacle. The problem with the existing air dam device is that the combined force of the tension of the spring on the air dam and the pressure of the air on the air dam keeps the air dam in the unfolded position. Due to the unstable speed of the vehicle or the unevenness of the road surface, the resultant force It is difficult to stabilize, which causes the air dam to shake constantly, causing noise, and even affecting the effect of reducing air diversion; there is also the fact that the air dam is hinged at the bottom of the front trim panel, and when the air dam is in the stowed position , is still partially exposed to the air, which increases the risk of damage to the air dam when it hits an obstacle; the air dam is forced through the coil spring, and if the coil spring is longer, it will cause the air dam to be exposed to the air when it is in the stowed position. The area of the air dam in the air is large, which affects the passability of the vehicle. If the coil spring is short, when the air dam hits an obstacle and needs to be completely turned backwards, the coil spring may not return to its original shape due to the deformation exceeding the limit. Therefore It is not easy to find suitable coil springs.

Contents of the invention

The object of the present invention is to provide a limiting member for an air dam that can improve the stability of the air dam at the deployed position; the purpose of the present invention is also to provide an air dam device and a vehicle using the limiting member for an air dam.

In order to solve the above problems, the technical scheme of the spacer for the air dam in the present invention is:

The limit piece for the air dam includes a limit bracket, the limit bracket is provided with a main support arm, the main support arm has a deformation end that can be elastically deformed in the inner and outer directions, and the deformation end of the main support arm is provided with a notch facing inward The card slot is used to engage with the air dam when the air dam is in the unfolded position. The card slot is pushed by the air dam when the air dam swings from front to back or from back to front so that the card slot moves toward the deformed end Outwardly moving front and rear sides of the tank.

The front and rear walls of the front side groove wall are inclined surfaces whose distance gradually increases from inside to outside, and the front and rear walls of the rear side groove wall are inclined surfaces whose distance gradually increases from inside to outside.

The position-limiting bracket is also provided with an auxiliary support arm that is arranged at intervals on the left side of the main support arm and can be elastically deformed in the inner and outer directions. The inner side of the auxiliary support arm is provided with a force-bearing surface for being pushed by the deformed end.

The technical scheme of air dam device in the present invention is:

The air dam device includes an air dam with a retracted position and an expanded position, and also includes a spacer for the air dam, the spacer for the air dam includes a spacer bracket, the spacer bracket is provided with a main support arm, and the main support arm has The deformed end that can be elastically deformed in the inner and outer directions, the deformed end of the main support arm is provided with a slot facing the air dam, which is used to engage with the air dam when the air dam is in the unfolded position. When swinging from front to back or from back to front, the front side groove wall and the rear side groove wall are pushed by the air dam so that the card groove moves with the deformed end.

The front and rear walls of the front side groove wall are inclined surfaces whose distance gradually increases from inside to outside, and the front and rear walls of the rear side groove wall are inclined surfaces whose distance gradually increases from inside to outside.

The limit bracket is also provided with an auxiliary support arm that can be elastically deformed in the inner and outer directions at intervals with the main support arm. The auxiliary support arm and the air dam are located on opposite sides of the main support arm, and the auxiliary support arm is adjacent to the main support arm. One side is provided with a force-bearing surface for being pushed by the deformed end.

The technical scheme of vehicle among the present invention is:

The vehicle includes a car body and an air dam device arranged on the car body, the air dam device includes an air dam with a stowed position and an unfolded position, and a device for limiting the air dam to the stowed position is arranged between the car body and the air dam The spring, the air dam device also includes a spacer for the air dam, the spacer for the air dam includes a spacer bracket, the spacer bracket is provided with a main support arm, the main support arm has a deformation end that can be elastically deformed in the inner and outer directions, The deformed end of the main support arm is provided with a notch facing the air dam, which is used to engage with the air dam when the air dam is in the unfolded position. When being pushed by the air dam, the front side groove wall and the rear side groove wall that make the card groove move with the deformed end.

The limit bracket is also provided with an auxiliary support arm that can be elastically deformed in the inner and outer directions at intervals with the main support arm. The auxiliary support arm and the air dam are located on opposite sides of the main support arm, and the auxiliary support arm is adjacent to the main support arm. One side is provided with a force-bearing surface for being pushed by the deformed end.

The car body includes a front trim panel and a structural crossbeam placed behind the front trim panel, the air dam is hinged on the structural beam, the air dam in the stowed position is on the upper side of the bottom end of the front trim panel, and the air dam It is arranged in the negative pressure area at the bottom of the vehicle body.

The spring is a clockwork spring, the clockwork spring is placed in a spring case, the spring case is fixed on the vehicle body, and the clockwork spring is connected to the air dam through a traction rope.

The beneficial effects of the present invention are: when the speed of the vehicle increases, the air dam swings from front to back, and the air dam and the front side groove wall of the card slot are pushed together so that the card slot moves with the deformed end, and the front side groove wall of the card slot After moving, make way for the air dam, so that the air dam is stuck in the card slot. Through the limit effect of the card slot on the air dam, the stability of the air dam at the unfolded position can be improved. If the vehicle accidentally hits an obstacle , the air dam will push and cooperate with the rear groove wall of the card slot, and the card slot avoids the air dam with the deformed end. Below the activation speed, the spring pulls on the air dam, and the air dam pushes out of the slot to reset.

Further, the air dam is arranged in the negative pressure area at the bottom of the car body. When the vehicle speed is equal to or higher than the activation speed, the air dam is rotated backward by the negative pressure, and then the air dam will turn out from the lower end of the front trim panel. And exposed, the front airflow and negative pressure work together to move the air dam to the unfolded position, and the air dam in the stowed position is on the upper side of the bottom of the front trim panel, so that the air dam will not affect the passage of vehicles at low speeds To prevent the vehicle from accidentally bumping into obstacles.

Further, the clockwork spring is used to exert an elastic force on the air dam, and the clockwork spring is connected to the air dam through a traction rope, so that the setting position of the clockwork spring is less restricted, which helps to improve the minimum position of the air dam when it is retracted. high.

Description of drawings

Fig. 1 is the structural representation of an embodiment of vehicle among the present invention;

Fig. 2 is a schematic diagram of cooperation between the air dam and the car body when the air dam is in the retracted position;

Fig. 3 is a schematic diagram of cooperation between the air dam and the car body when the air dam is in the unfolded position;

Fig. 4 is a schematic diagram of cooperation between the air dam and the car body when the air dam encounters road obstacles;

Fig. 5 is a schematic diagram of cooperation between the air dam and the spacer for the air dam in the state of Fig. 2;

Fig. 6 is a schematic diagram of cooperation between the air dam and the spacer for the air dam when in the state of Fig. 3;

Fig. 7 is a schematic diagram of cooperation between the air dam and the air dam limiter when the air dam encounters road obstacles;

Fig. 8 is a schematic structural view of an embodiment of a spacer for an air dam in the present invention;

Figure 9 is a top view of Figure 8;

Fig. 10 is a schematic structural view of the spring in the present invention.

detailed description

The embodiment of the vehicle is shown in Figures 1 to 10: it includes a car body 1, a headlight 2 and an air dam device 4 arranged on the car body, and the car body 1 includes a front trim panel 12 and a structural beam 3 arranged on the rear side of the front trim panel . The air dam device includes an air dam 5 with a stowed position and an expanded position, the air dam is arranged in the negative pressure area at the bottom of the vehicle body, and the structural beam 3 includes a front mounting part 11, a middle mounting part 9 and a rear mounting part 9 arranged at intervals along the front and rear directions. Mounting part 15, air dam 5 are hinged on the bottom of middle mounting part 9, and the bottom of front mounting part and the bottom of rear mounting part are respectively provided with front stopper 13, rear limiter that limit air dam forward and backward rotation limit. Bit block 14, wherein the front rotation limit of the air dam is the retracted position of the air dam, and the air dam in the retracted position is on the bottom upper side of the front trim panel 12 . A spring for limiting the air dam to a retracted position is arranged between the car body and the air dam. In this embodiment, the spring is a clockwork spring 21 arranged in a depression between the front mounting part and the middle mounting part. In the spring case 10, the spring case 10 is fixed on the structural beam, the clockwork spring is connected to the air dam 5 through the transmission ring 20 and the traction rope 8, and the middle part of the air dam is provided with a connecting hole 7 for the traction rope to connect.

The air dam device also includes spacers for air dams arranged at the left and right ends of the air dam. In this embodiment, the left and right direction is the inside and outside direction. And the auxiliary support arm 151 that can be elastically deformed in the inner and outer direction, the main support arm 16 and the auxiliary support arm 151 are arranged at intervals, the auxiliary support arm 151 and the air dam 5 are respectively located on the opposite sides of the main support arm, and the main support arm 16 has a The deformed end elastically deforms in the inner and outer directions, and the end of the auxiliary support arm adjacent to the main support arm is provided with a force-bearing surface for being pushed by the deformed end. The deformed end of the main support arm is provided with a slot 17 facing the air dam, which is used to engage with the air dam when the air dam is in the unfolded position. The notch of the card slot faces to the right, and the notch of the card slot of the limiter for the right air dam faces to the left. With the front side groove wall 18 and the rear side groove wall 19 moving with the deformed end, the front and rear wall surfaces of the front side groove wall are slopes that gradually become larger from the right to the front, and the front and rear wall surfaces of the rear side groove wall are The spacing gradually increases from the right to the front, and the rear groove wall protrudes from the front groove wall, which means that the air dam needs to overcome greater resistance to continue to swing backward.

The working process of the air dam device in the present invention is: when the speed of the vehicle is lower than the activation speed, the spring limits the air dam to the retracted position, as shown in Figure 2, the air dam is tightly pressed on the corresponding limit block; when the vehicle speed Equal to or higher than the activation speed, the negative pressure on the air dam is greater than the tension of the spring, and the air dam starts to rotate backward. When the lower end of the air dam turns out from the lower side of the front trim panel, the air dam begins to be directly impacted by the airflow in front. Under the combined force of negative pressure and impact force, the air dam continues to rotate until it collides with the front wall of the card slot. The front wall of the card slot is pushed by the air dam, and the deformed end moves accordingly to avoid the air dam. Finally, the air dam is stuck in the slot as shown in Figure 3; since the back side of the slot protrudes from the front side of the slot, the air dam needs to overcome a large resistance to continue to rotate backwards, which is The air dam can be firmly limited in the card slot, and the setting of the auxiliary support arm can make the positioning of the air dam more secure, because if the vehicle speed continues to increase within a certain range, the deformed end will be supported by the auxiliary support arm, thus limiting the air dam. The dam continues to rotate, and through the setting of the two-layer limit structure, the air dam can meet the high-speed limit requirements; if the vehicle accidentally encounters an obstacle, the air dam will push and cooperate with the rear groove wall of the card slot, and the auxiliary support The arm will also undergo elastic deformation as shown in Figure 4, the air dam will come out of the slot, and continue to rotate backwards to another limit block; The dam will move back into the slot and be restrained in the deployed position, and if the vehicle speed is significantly reduced, the spring will pull the air dam back into the stowed position.

In other embodiments of this vehicle: when the air dam can be firmly limited to the unfolded position by one air dam, there can be only one air dam; if the vehicle speed is not very high, the air flow When the power is not very large, the auxiliary support arm can not be provided, and the rear side groove wall can not protrude from the front side groove wall; The bar spring can also be replaced by a coil spring; the air dam at the stowed position can also be lower than the bottom of the front trim panel, and the air dam does not need to be arranged in the negative pressure area at this time; The two side surfaces can also be planes arranged in parallel, and in this case, the corresponding ends of the air dam need to be arranged in an inclined-plane structure or a spherical structure.

Embodiments of the air dam device are shown in FIGS. 1-10 : the specific structure of the air dam device is the same as the air dam device described in the above vehicle embodiments, and will not be described in detail here.

The embodiment of the spacer for the air dam is shown in Figures 1 to 10: the specific structure of the spacer for the air dam is the same as the spacer for the air dam described in the vehicle embodiments above, and will not be described in detail here.

Claims (10)

1. air dam locating part, it is characterised in that：Including limiting bracket, master arm, master arm are provided with limiting bracket With can in inward-outward direction elastic deformation deformed end, be provided with the deformed end of master arm notch inwardly in gas Dam is in the draw-in groove matched somebody with somebody with air dam card when launching position, and draw-in groove has and swung from front to back or during by rear to preceding swing by gas in air dam Front side cell wall and rear side cell wall that dam crest is pushed away and draw-in groove is moved outwardly with deformed end.

2. air dam locating part according to claim 1, it is characterised in that：Between the forward and backward wall of the front side cell wall is Away from the inclined-plane for becoming larger from the inside to the outside, the forward and backward wall of the rear side cell wall is the inclined-plane that spacing becomes larger from the inside to the outside.

3. air dam locating part according to claim 1 and 2, it is characterised in that：Interval is additionally provided with limiting bracket to set Be placed on the left of the master arm can in inward-outward direction elastic deformation auxiliary support arm, be provided with use on the inside of auxiliary support arm In by the stress surface of the deformed end pushing tow.

4. air dam device, including with packing up position and launch the air dam of position, it is characterised in that：Also include air dam locating part, gas Dam includes limiting bracket with locating part, is provided with master arm on limiting bracket, master arm have can in inward-outward direction bullet Property deformation deformed end, be provided with the deformed end of master arm notch towards air dam for air dam be in launch position when with The draw-in groove that air dam card is matched somebody with somebody, draw-in groove have air dam swing from front to back or made by air dam pushing tow during by rear to preceding swing draw-in groove with The front side cell wall and rear side cell wall of deformed end movement.

5. air dam device according to claim 4, it is characterised in that：The forward and backward wall of the front side cell wall be spacing by It is interior to the inclined-plane for becoming larger outward, the inclined-plane that the forward and backward wall of the rear side cell wall becomes larger from the inside to the outside for spacing.

6. the air dam device according to claim 4 or 5, it is characterised in that：It is additionally provided with limiting bracket and the main branch Brace it is spaced can in inward-outward direction elastic deformation auxiliary support arm, auxiliary support arm, air dam be located at master arm phase To both sides, the side that auxiliary support arm closes on master arm is provided with for by the stress surface of the deformed end pushing tow.

7. vehicle, including car body and the air dam device being arranged on car body, air dam device includes having to be packed up position and launches position Air dam, is provided with the spring that position is packed up for air dam to be limited between car body and air dam, it is characterised in that：Air dam device is also wrapped Air dam locating part is included, air dam includes limiting bracket, master arm is provided with limiting bracket with locating part, and master arm has Can in inward-outward direction elastic deformation deformed end, notch is provided with the deformed end of master arm towards air dam in gas Dam is in the draw-in groove matched somebody with somebody with air dam card when launching position, and draw-in groove has and swung from front to back or during by rear to preceding swing by gas in air dam Front side cell wall and rear side cell wall that dam crest is pushed away and draw-in groove is moved with deformed end.

8. vehicle according to claim 7, it is characterised in that：It is additionally provided with limiting bracket and is spaced with the master arm Set can in inward-outward direction elastic deformation auxiliary support arm, auxiliary support arm, air dam be located at master arm opposite sides, it is auxiliary The side that support arm closes on master arm is provided with for by the stress surface of the deformed end pushing tow.

9. the vehicle according to claim 7 or 8, it is characterised in that：After car body includes front trim panel and is placed in front trim panel The structural beams of side, air dam is articulated with the structural beams, and the air dam for packing up position is in the bottom of the front trim panel Upside, air dam is arranged in the negative pressuren zone of the vehicle bottom.

10. vehicle according to claim 9, it is characterised in that：The spring is clockwork spring, and clockwork spring is placed in spring In shell, spring case is fixed on the car body, and clockwork spring is connected by pull rope with the air dam.