CN106703578A - Bouncing structure used for automobile engine cover and method for bouncing automobile engine cover - Google Patents

Abstract

The invention relates to a dual-axis active pedestrian protection automobile engine cover hinge, which provides a pop-up structure for the automobile engine cover, including: an upper piece and a lower piece fixed on the vehicle body, wherein the upper piece is at its first The pin is fixed to the lower piece, and the spring piece is fixed on the engine cover, and the spring piece can be hinged at the second pin opposite to the first pin of the upper piece; it can slide relative to the upper piece a sliding piece; and an elastic device configured to allow the spring-up piece to rotate around the second pin hinge while allowing the sliding piece to slide. In the event of a pedestrian impact, the bonnet is raised, thereby protecting the pedestrian. The invention also provides a method for popping up an automobile engine cover.

Description

Pop-up structure for automobile engine cover and method for springing up automobile engine cover

technical field

The invention relates to an automobile engine cover hinge for active pedestrian protection, belonging to the technical field of automobile hinge structures.

Background technique

The global GTR standard is gradually promoted, and the standard has become a mandatory requirement in Japan and South Korea in Europe and Asia. In order to protect the safety of pedestrians and follow the trend of the world's automotive technology development, China has accordingly formulated a recommended national standard: Regulations on the Protection of Automobile Pedestrians GBT 24550, which is expected to be enforced in 2015. In addition, there are more complex and strict pedestrian protection evaluation standards around the world. Europe has Euro N CAP, Japan has Japan NCAP, South Korea has Korea NCAP, Australia has Austria NCAP, and China's CNCAP is gradually raising the requirements. Therefore, the automobile pedestrian protection regulations are a new challenge for my country's automobile industry. For this reason, each automobile manufacturer is all stepping up the research to the automobile pedestrian protection technology.

The pedestrian protection regulations mainly include the lower leg test and the head test, and the score of the head collision depends critically on the arrangement and design of the front cover. Head injuries are a key cause of serious injury and death in pedestrian injury accidents.

Tests of head module impact bonnets have shown that increased free space under the bonnet reduces the head injury value (HIC). The active hinge of the bonnet of the vehicle, firstly, is configured to open the bonnet in case of service and, secondly, allows adjustment of the height of the bonnet in case of a pedestrian collision. At present, most active pedestrian protection engine covers use irreversible gunpowder pop-up systems, and a few mechanical systems have problems such as reliability and low transmission efficiency.

Contents of the invention

The invention relates to a two-axis active pedestrian protection automobile engine cover hinge, which is unlocked in the case of pedestrian impact, adjusts the engine cover in the case of pedestrian collision, increases the free space under the engine cover, and can reduce the head injury value ( HIC).

According to a first aspect of the present invention, there is provided a pop-up structure for an automobile engine cover, comprising: an upper piece and a lower piece fixed on the vehicle body, wherein the upper piece is fixed to the lower piece at its first pin ; the spring piece fixed on the engine cover, the spring piece can be hinged at the second pin opposite to the first pin of the upper piece; the sliding piece that can slide relative to the upper piece; and the elastic device , the elastic device is configured to make the spring-up piece pivot around the second pin hinge, and at the same time make the sliding piece slide.

In a preferred embodiment, the elastic device is a torsion spring, one end of which abuts against the slot of the sliding piece, and the other end abuts against the spring piece, wherein when the torsion spring is released, the spring The lifting piece pivots around the second pin hinge, and the sliding piece slides relative to the upper piece, thereby lifting the engine cover.

Preferably, said upper piece includes limiting means which limit the release of said elastic means when the limiting means is not activated. The limit device is configured as a bolt-type locking element controlled by a solenoid valve with a reset mechanism. When not activated, the bolt-type locking element is accommodated in the recess of the slide plate. The element is retracted, thereby releasing said elastic means.

In another preferred embodiment, the spring piece includes a flange supporting the engine cover, and the other end of the torsion spring is against the lower surface of the flange.

More preferably, the spring-up piece includes an arm provided with a slot, and the groove accommodates the first guide pin of the upper piece so as to guide the spring-up piece to rotate around the hinge of the second pin. The sliding piece includes a guide groove, which accommodates the second guide pin of the upper piece, so as to guide the sliding of the sliding piece relative to the upper piece.

According to a second aspect of the present invention, there is provided a method for popping up an automobile engine cover, comprising: fixing the upper piece and the lower piece through a first pin, wherein the lower piece is fixed on the vehicle body; fixing the springing piece on the engine cover On the upper piece, the spring piece and the upper piece are hinged at the second pin opposite to the first pin of the upper piece; a sliding piece capable of sliding relative to the upper piece is provided; an elastic device is provided, and the elastic device is configured In order to make the spring-up piece pivot around the second pin hinge, and at the same time make the sliding piece slide.

According to the third aspect of the present invention, there is provided a method for popping up the hood of a car by operating the above pop-up structure.

Description of drawings

Fig. 1 shows the biaxial active pedestrian protection engine cover hinge of the present invention;

Figure 2 shows the back of the dual-axis active pedestrian protection bonnet hinge shown in Figure 1;

Fig. 3 shows the open state of the two-axis active pedestrian protection engine cover hinge of the present invention.

detailed description

Hereinafter, the biaxial active pedestrian protection engine cover hinge of the present invention will be described in detail in conjunction with the accompanying drawings. The direction of travel of the vehicle is indicated in the figure and is marked with an arrow FR.

The automobile engine cover hinge with biaxial active pedestrian protection includes an upper piece 3 and a lower piece 1, the upper piece and the lower piece are connected by a pin shaft 2, and the lower piece 1 is fixed on the body structure. In normal use, it is similar to a single-axis bonnet hinge.

In order to realize the active pedestrian protection function, a double-axis front cover pop-up structure is designed on the hinge upper piece 3 . The pop-up piece 6 and the upper piece (support piece) 3 are connected by a pin shaft 7, and the engine cover is fixed on the pop-up piece 6 through a specific connection method. When the active pedestrian protection is triggered, the support piece 3 remains stationary, and the spring piece 6 rotates around the axis 7 to raise it to a certain height, so as to ensure that there is a space under the engine cover when a pedestrian collides.

The spring piece 6 is the main structure for active protection, including the flange supporting the engine cover. The sliding sheet 10 can slide relative to the upper sheet 3 . The elastic device 4 is configured to make the pop-up piece 6 pivot around the pin shaft 7 and at the same time make the sliding piece 10 slide.

In one embodiment, the elastic device is configured as a torsion spring, one end of which abuts against the slot 13 of the sliding piece 10 , and the other end abuts against the lower surface of the flange of the pop-up piece 6 .

The limit mechanism 12 is fixed on the supporting sheet 3, and when a pedestrian collides, the limit structure 12 is activated to start pedestrian protection, as shown in FIG. 3 . The limit mechanism 12 is designed with a reset mechanism, which can be reused. The limiting mechanism 12 includes but not limited to a solenoid valve structure.

When the solenoid valve is not activated, the latch-type locking element is in the extended position and is accommodated in the notch of the sliding plate 10, thereby limiting the release of the torsion spring 4. At this time, the torsion spring 4 is in a pre-compressed state, providing for lifting the engine cover. elastic potential energy. When the solenoid valve is activated, the bolt-type locking element is retracted, the limit is canceled, and the torsion spring 4 is released. Under the action of the torsion spring 4, the pop-up piece 6 pivots around the pin shaft 7, the sliding piece 10 slides relative to the support piece 3, and the torsion spring 4 spreads the pop-up piece 6 and the sliding piece 10 at a certain angle, thereby lifting the Engine cover.

The pop-up piece 6 includes an arm provided with a slot, the slot accommodates the first guide pin 8 of the support piece 3 for guiding the hinge rotation of the pop-up piece 6 around the pin shaft 7 . The groove can also limit the lifting angle of the pop-up piece 6 . The elastic element 9 provides cushioning and position-limiting when the bump is bouncing close to the highest position.

The sliding piece 10 includes a guide groove, which accommodates the second guide pin 11 of the supporting piece 3 for guiding the sliding of the sliding piece 10 relative to the supporting piece 3 . The sliding piece moves along the track of the guide groove to the position shown in FIG. 3 .

During the collision process, the solenoid valve receives the signal sent by the collision sensor, retracts the latch type locking element, and the torsion spring 4 pushes the sliding piece 10 to rotate around the second guide pin 11, and lifts the cover side mounting piece and the front cover. In this way, The space under the engine cover is increased, and the pedestrian head injury value is reduced.

After the collision is triggered, the collision sensor is powered off, and the bolt-type locking element 12 is released, and can be snapped into the notch of the sliding plate 10 again by pressing the hinges on both sides of the engine cover, so that it can be used repeatedly and reduce the maintenance cost of replacing the hinge.

Compared with the current main five-axis and multi-axis gear and rack type pedestrian protection hinges with complex structure, the invention has the following advantages: the structure design is simple and reasonable, and the reliability is high. Good durability, can be reused many times, stable performance, simple manufacturing process, light weight, convenient installation and operation, etc.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods, as long as various insubstantial improvements are adopted in the method concept and technical solutions of the present invention, or there is no improvement Directly applying the conception and technical solutions of the present invention to other occasions falls within the protection scope of the present invention.

Claims (9)

1. a kind of upspring structure for car engine cover, including：

Upper piece and the bottom sheet that is fixed on vehicle body, piece the bottom sheet is fixed at its first pin wherein on this,

The piece of upspringing on hood is fixed on, the piece of upspringing being capable of hinge rotation at upper piece second pin relative with the first pin；

Can relative to it is described upper piece slide slide；And

Elastic device, the elastic device is constructed so that the piece of upspringing is rotated around the described second pin hinge, while so that the slide is slided.

2. upspring structure according to claim 1, the elastic device is torque spring, draw-in groove of its one end against the slide, its other end is against the piece of upspringing, wherein when the torque spring is released, this upspring piece around described second pin hinge rotate, the slide relative to it is described upper piece slide, so as to lift the hood.

3. according to the upspring structure of claim 1 or 2, it is described upper piece include stopping means, when the stopping means is not activated, the release of its limitation elastic device.

4. upspring structure according to claim 3, the stopping means is configured to by the bolt-type locking member of the solenoid valve control with resetting-mechanism, when not being activated, the bolt-type locking member is contained in the recess of the slide, in activation, the bolt-type locking member is retracted, so as to discharge the elastic device.

5. according to the upspring structure of any one in claim 1-4, the piece of upspringing includes the flange of the support hood, the lower surface of the other end of the torque spring against the flange.

6. according to the upspring structure of any one in claim 1-5, the piece of upspringing includes being provided with the arm of conduit, and the conduit accommodates upper piece the first guiding pin, so as to guide the piece of upspringing to be rotated around the hinge of the described second pin.

7. according to the upspring structure of any one in claim 1-6, the slide includes being provided with guide groove, and the guide groove accommodates upper piece the second guiding pin, so as to guide slip of the slide relative on this.

8. a kind of method of car engine cover of upspringing, including：

By the first pin fixation upper piece and bottom sheet, the wherein bottom sheet is fixed on vehicle body；

The piece that will upspring is fixed on hood, at upper piece second pin relative with the first pin chain connection this upspring piece and this on piece；

There is provided can relative to it is described upper piece slide slide；

Elastic device is provided, the elastic device is constructed so that the piece of upspringing is rotated around the described second pin hinge, while so that the slide is slided.

9. it is a kind of by operational rights requirement 1-7 in any one upspring structure, so as to the method for car engine cover of upspringing.