KR20130018058A - Actuator of active hood system for vehicle - Google Patents

Abstract

PURPOSE: An actuator of an active hood system for a vehicle is provided to reduce pedestrian injury by lifting the rear end of a hood when a car crash happens. CONSTITUTION: An actuator of an active hood system for a vehicle comprises a housing(10), an inner body(20), a latch mechanism(30), and an electromagnet assembly(60). The housing is fixed to a vehicle body. The inner body is inserted inside the housing to move up and down with the rear part of a hood. A striker is integrally fixed inside the inner body. The latch mechanism is installed in the housing and locks or unlocks the striker of the inner body. The electromagnet assembly is installed between the housing and the inner body. The electromagnet assembly is equipped to lift the inner body with a repulsive force generated by first and second electromagnets(61,62).

Description

Actuator of active hood system for vehicle

The present invention relates to an active hood device for an automobile, and more particularly, for an automobile which can raise the rear end of a hood during a pedestrian collision accident to reduce an injury value of a pedestrian, and easily restore the rear end of the hood to its original position after a collision accident. It relates to an actuator of an active hood device.

In general, an engine compartment is provided at the front of the vehicle, and the engine compartment is opened and closed by a hood.

In the vehicle, the hood not only functions to open and close the engine room but also shields the engine room to block engine noise, and the left and right sides of the rear end are coupled to the upper part of the engine room via the hood hinge assembly to center the hood hinge assembly. Rotate to open and close the engine room.

However, the hood is known to cause serious injury to pedestrians when a pedestrian collides, and an active hood system is used to secure a space for absorbing the impact energy of a pedestrian between the hood and the engine room when a collision occurs. It is becoming.

The active hood device raises the rear end (or hood hinge assembly) of the hood to protect the pedestrian in the event of a collision.It is a pedestrian protection device that cushions pedestrian shocks and reduces injuries. When the sensor of the front bumper detects a pedestrian collision, the controller operates the actuator according to the detection signal of the sensor to raise the rear end of the hood to secure a buffer space between the hood and the engine room.

However, the conventional active hood device has the following problems.

Various actuators have been proposed for lifting the rear end of the hood in an active hood device, and it is difficult for a user to manually restore the operating state of the actuator and the position of the hood to the original pre-operation state after a pedestrian crash.

That is, due to excessive spring force of the elastic member lifting the rear end of the hood after the actuator operation, it is difficult for the user to manually lower and close the rear end of the hood, which is directly raised, and thus, the user's convenience is deteriorated.

Accordingly, after the pedestrian crash accident, the rear end of the hood is lifted up and moved to an automobile repair center, and the like, and there is a problem that an accident risk increases when the rear end of the hood is raised.

Therefore, the present invention has been created to solve the above problems, in the event of a pedestrian crash accident to raise the rear end of the hood to reduce the injury value of the pedestrian, and after the crash accident can easily restore the rear end of the hood to its original position. An object of the present invention is to provide an actuator of an active hood device for a vehicle.

In order to achieve the above object, the present invention, the active hood device for a vehicle for raising the hood hinge assembly in accordance with the control signal of the controller receiving the collision detection signal of the collision detection sensor to raise the rear end of the hood during pedestrian collision An actuator comprising: a housing fixed to a vehicle body; An inner body inserted into the housing so as to be lifted up and down and moving up and down with the rear end of the hood, and having a striker integrally fixed therein; A latch mechanism installed in the housing to lock or release the striker of the inner body; And an electromagnet assembly provided between the housing and the inner body to raise the inner body with the repulsive force generated between the electromagnets.

Here, the electromagnet assembly, the first electromagnet is fixed to the inner body and provided to be elevated with the inner body integrally; And a second electromagnet fixed to the housing and disposed under the first electromagnet, wherein the first electromagnet and the second electromagnet are of the N pole and the S pole by currents applied under the control of a controller. It is characterized in that it is provided to have a polarity.

In addition, the controller generates a repulsive force by controlling the application of current so that the opposite ends of the first electromagnet and the second electromagnet disposed up and down when receiving a collision detection signal of the collision detection sensor in the case of a pedestrian collision accident have the same polarity. It features.

In addition, the controller is characterized in that the attraction is generated by controlling the application of current so that the opposite ends of the first electromagnet and the second electromagnet disposed up and down when the inner body and the rear end of the hood is restored down.

In addition, the controller is characterized in that for controlling the flow direction of the current applied to any one of the first electromagnet and the second electromagnet to be opposite to the pedestrian collision accident.

Accordingly, in the actuator of the active hood device for automobiles according to the present invention, the rear end of the hood is raised by the magnetic force during the pedestrian collision accident to reduce the injury value of the pedestrian, and the rear end of the hood is easily returned to the original state by the magnetic force after the collision accident. Since it can be restored to fall, the user's convenience is increased.

1 is a view showing a state in which the rear end of the hood of the vehicle is lifted by the active hood device when a conventional pedestrian collision occurs.
2 is a view showing the configuration of an active hood device using the actuator of the present invention.
3 is a perspective view of an actuator according to an embodiment of the present invention.
4 is a perspective view of a state in which the front portion of the housing is removed by removing the actuator shown in FIG. 3.
5 and 6 are perspective views showing the internal configuration of the actuator according to the embodiment of the present invention.
7A to 7C are views illustrating an operating state of the actuator according to the embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

The present invention relates to an actuator of an active hood device for an automobile that can raise the rear end of a hood in a pedestrian collision accident to reduce an injury value of a pedestrian and, after a collision accident, can easily restore the rear end of a raised hood to its original state.

2 is a view showing the configuration of an active hood device using the actuator of the present invention. Referring to the configuration of the active hood device, a collision detection sensor 40 mounted on a vehicle bumper side and detecting a pedestrian collision, and a collision detection sensor ( The controller 42 outputs a control signal for raising the rear end of the hood 44 by receiving the collision detection signal of 40 and a hood hinge assembly mounted to the vehicle body part in the engine room on both sides of the rear end of the hood 44. And an actuator 50 provided to raise the hood hinge assembly in accordance with a control signal output from the controller 42 while supporting the same.

At this time, when the controller 42 receives the collision detection signal of the collision detection sensor 40 to drive the actuator 50, the hood hinge assembly is raised by the driving of the actuator 50, and at the same time the hood hinge assembly The rear end portion of the hood 44 coupled to the upper portion is pushed up to buffer the pedestrian.

Next, the actuator of the active hood device according to the present invention will be described in detail with reference to FIGS. 3 to 6.

3 is a perspective view of the actuator 50 according to an embodiment of the present invention, Figure 4 is a perspective view of the state removed by cutting the front portion of the housing 10 in the actuator 50 shown in Figure 3, Figure 5 and Figure 6 is a perspective view showing the internal configuration of the actuator 50 according to the embodiment of the present invention. 5 and 6 illustrate a state in which the front portion of the inner body 20 is cut off and removed.

As described above, the actuator 50 of the present invention is controlled by the controller 42, and the pedestrian shock is controlled under the control of the controller 42 that receives the collision detection signal of the collision detection sensor 40 during a pedestrian collision. The rear end of the hood 44 may be raised to be minimized, and the rear end of the raised hood 44 may be lowered and restored after a crash, thereby increasing user convenience.

First, the actuator 50 is installed between the engine compartment and the hood 44, more specifically between the body part in the engine compartment and the hood hinge assembly coupled to the rear end of the hood 42.

In addition, the actuator 50 may be provided in a box shape having an upper end opening and fixed to a vehicle body part in the engine room, and may be inserted into a housing 10 through an open upper end of the housing 10. Inner body 20 is assembled.

A fastening part 10a is formed on the upper left and right side parts of the housing 10, and a vehicle body part not shown is coupled to the fastening part 10a.

In addition, a fastening portion 20a is formed at an upper end of the inner body 20, and a hood hinge assembly not shown is coupled to the fastening portion 20a.

Accordingly, the actuator 10 is positioned between the body portion and the hood hinge assembly with the housing 10 coupled to the body portion in the engine room and the inner body 20 coupled to the hood hinge assembly. 50 may be configured to support the rear end of the hood hinge assembly and the hood 44 coupled thereto in the engine compartment.

In addition, when the inner body 20 is raised or lowered, the rear end of the hood 44 is raised or lowered together with the hood hinge assembly coupled thereto.

The inner body 20 is a lifting element provided in a box shape having an open lower end. As shown in FIG. 4, the inner body 20 also has a shape in which the lower part is opened (base plate 31 and solenoid mechanism 35 to be described later). ) Is to be fixed to the front portion of the housing 10), the striker (s) disposed horizontally long between the front portion and the rear portion of the inner body is fixedly installed inside the inner body (20).

In addition, inside the housing 10 and the inner body 20, the pedestrian collision accident locks while keeping the striker s locked in the lower position of the inner body (the usual position before the pedestrian collision occurs and before the actuator operation). A latch mechanism 30 for unlocking a state and an electromagnet assembly 60 for elevating the inner body 20 by using a magnetic force generated during power supply are provided.

In addition, the housing 10 is fixed to the guide pin 11 for guiding the lifting movement of the inner body 20 to protrude toward the inner body 20, the guide pin 11 is the inner body 20 It is inserted into the guide slot 21 of the coupling.

The guide pins 11 may be installed in the left and right sides of the housing 10, respectively, and the guide slots 21 of the inner body 20 may also be inserted and coupled to each guide pin 11. Is installed on.

Accordingly, when the inner body 20 moves up and down within the housing 10, the guide pin 11 moves along the guide slot 21, and the inner body 20 to which the guide pin 11 moves up and down is moved. Will guide the movement of.

The guide slot 21 is a portion defining the vertical movement path of the guide pin 11, the front and rear portions of the inner body 20 is formed long in the vertical direction, the guide pin 11 of the housing 10 In this insertion coupled state, the rising height of the inner body 20 is limited to prevent the inner body from being completely separated upward from the housing 10.

Hereinafter, the configuration of the latch mechanism and the electromagnet assembly will be described.

The latch mechanism 30 is a component that locks or unlocks the striker s installed in the inner body 20. In general, the latch mechanism 30 is locked while the striker s of the inner body 20 is locked. The controller 42 is configured to release the lock state of the striker s by a control signal output by the controller 42 that has received the collision detection signal of the detection sensor 40.

To this end, the latch mechanism 30 is fixed to the inner surface of the front portion of the housing 10, the base plate is formed with a recess groove 31a is inserted into the striker (s) of the inner body 20 to be liftable (31), a latch 32 that is elastically rotatable to the base plate 31 and locks or unlocks the striker s inserted into the recess 31a of the base plate 31, the base plate ( A first detent (33) rotatably installed on the base plate (31) for fixing or releasing the latch (32) in a striker lock state, and a resilient rotatable installation on the base plate (31); A second detent 34 for fixing or releasing 33 to a latch fixed state, and a solenoid mechanism 35 for rotating the second detent 34 to the first detent release position in accordance with a control signal of the controller 42. It is configured to include).

Here, the base plate 31 is a fastening point of the lower end is fastened to be fixed to the front portion of the housing 10, unlike the latch 32, the first and second detents (33, 34) so that the rotation is impossible. It is fixed.

The latch 32, the first detent 33, and the second detent 34 are resiliently rotated by the elastic restoring force of the return springs 36, 37 and 38 respectively provided on the rotational center points.

At this time, the force to be restored after deformation of each of the return springs 36, 37, 38, that is, each elastic restoring force, is the center of rotation of the latch 32 in the case of the return spring 36 installed on the center of rotation of the latch 32. It is intended to act in the reference clockwise direction.

In addition, the return spring 37 provided on the rotation center point of the first detent 33 also acts in the clockwise direction of the rotation center of the first detent 33 and on the rotation center point of the second detent 34. In the case of the return spring 38 installed at the center, the return spring 38 acts in the counterclockwise direction of the rotational center of the second detent 34.

On one side of the latch 32 is formed a locking groove (32a) is inserted into the striker (s) inserted into the recess groove (31a) of the base plate 31 is locked, the first end of the latch 32 A locking end 32b is formed to protrude from the locking step 33a, 33b of the detent 33.

In addition, the first end of the first end of the first detent 33 is latched to the latching end 32b of the latch 32, which locks the striker s in order to secure the latch 32 in the striker lock state. The jaw 33a and the second catching jaw 33b are formed so that the latching end 32b of the latch 32 is no longer rotated while the latch 32 is rotated to the striker lock release position. .

In addition, the third latching jaw that is to be caught by the front end portion of the first detent 33 in the latching position in order to secure the first detent 33 to the latched position on one side and the other side of the second detent 34 34a and a fourth latching jaw 34b formed such that the front end portion of the first detent 33 is no longer rotated while the first detent 33 is rotated to the latch release position. do.

The solenoid mechanism 35 is configured such that the operating rod 35a moves forward and backward under the power supply control of the controller 42. The operating rod 35a has a slot hole of the second detent 34 at the distal end thereof. The connecting pin 35b fitted into the 34c is provided in a fixed structure.

Accordingly, when the solenoid mechanism 35 is driven to move the operating rod 35a backward, the second detent 34 is pulled downward on the drawing by the operating rod 35a to be rotated counterclockwise (downward rotation), On the contrary, when the actuating rod 35a is advanced, the second detent 34 is pushed upward by the actuating rod 35a and rotated clockwise (upward rotation).

The controller 42 controls the driving of the solenoid mechanism 35 so that the actuating rod 35a moves backward to raise the inner body 20 and the rear end of the hood in the event of a pedestrian collision in controlling the driving of the solenoid mechanism 35, In the restoration after the accident, the operating rod 35a is controlled to move forward for restoring the lower portion of the inner body 20 and the rear end of the hood.

The solenoid mechanism 35 is connected to the connector 12 installed on the lower side of the housing 10 through an internal conductor, and receives power from the controller 42 through the connector 12 and an external conductor connected thereto.

The connector 12 is also connected to each electromagnet (coil of the electromagnet) of the electromagnet assembly 60, which will be described later, through an inner conductor, and an external conductor for supplying power (electromagnet applied current) for driving each electromagnet is connected to the connector ( 12) together.

On the other hand, the electromagnet assembly 60 is installed between the housing 10 and the inner body 20, the inner body 20 under the control of the controller 42 received the collision detection signal of the collision detection sensor 40 in the case of a pedestrian collision accident ) And a component that is driven to generate an actuation force for raising the rear end of the hood 44 (which rises together when the inner body rises).

In addition, the electromagnet assembly 60 is driven to generate an operating force for restoring the rear end portions of the inner body 20 and the hood 44 to the original state before the accident under the control of the controller 42 after the pedestrian collision accident.

Looking at the configuration, the electromagnet assembly 60 is disposed in each of the left and right sides of the latch mechanism 30 inside the inner body 20, the two electromagnet assemblies 60 on both the left and right sides are respectively two electromagnets arranged up and down, That is, it consists of the upper 1st electromagnet 61 and the lower 2nd electromagnet 62.

Accordingly, the first electromagnets 61 are disposed on both the left and right sides of the latch mechanism 30, so that the total number of the first electromagnets 61 is two, and the second electromagnets 62 are also arranged under the first electromagnets 61, respectively.

The two first electromagnets 61 are integrally fixed to the inner body to move up and down integrally with the inner body 20, and the two second electromagnets 62 are disposed below each first electromagnet 61. The first electromagnet 61 is a movable electromagnet that moves up and down, and the second electromagnet 62 is a fixed electromagnet fixed to the housing 10.

An electromagnet is a magnet that becomes magnetized when current flows and returns to its original non-magnetized state when disconnected. It is distinguished from a permanent magnet that always maintains its magnetization regardless of the supply of current. By using the principle that a concentric magnetic field is formed, there is an advantage that a very strong magnetic field cannot be obtained with a permanent magnet.

The simplest form of electromagnet is a solenoid made by winding a coil around a cylindrical iron core, and when a current flows through the coil, the electromagnet has polarities of the north pole and the south pole, similar to the permanent magnet. Since the second electromagnet 62 is the same as the general electromagnet, detailed description thereof will be omitted.

In each electromagnet assembly 60, the first electromagnet 61 and the second electromagnet 62 are arranged vertically long so that when the current is applied to the coil, the upper and lower portions have the polarities of the N pole and the S pole. When the end portions of the first electromagnet 61 and the second electromagnet 62 that face each other are the same pole, the repulsive force pushing each other acts to pull each other.

The two electromagnet assemblies 60 on both the left and right sides of the actuator 50 are driven according to the control signal of the controller 42, and current is applied to the coils of the first electromagnet 61 and the second electromagnet 62 for magnetization. The coils of the first electromagnet 61 and the second electromagnet 62 are connected to the controller 42 via the connector 12 and an external conductor.

Therefore, when the controller 42 controls the current applied to the first electromagnet 61 and the second electromagnet 62, the operation of the two electromagnet assemblies 60 may be controlled. It includes a current control unit (not shown) for controlling the current supply of the electromagnet 61 and the second electromagnet 62.

Accordingly, when the controller 42 receives the collision detection signal of the collision detection sensor 40 in the case of a pedestrian collision, the current controller of the controller 42 applies current to the first electromagnet 61 and the second electromagnet 62, respectively. By magnetizing the two electromagnets, thereby driving the electromagnet assembly 60 to raise the inner body (20).

That is, in the case of a pedestrian collision accident, the current control unit of the controller 42 applies a current to each electromagnet coil so that the opposite ends of the first electromagnet 61 and the second electromagnet 62 have the same polarity, and by the repulsive force generated at this time The first electromagnet 61 allows the second electromagnet 62 to be pushed up so that the first electromagnet 61 and the inner body 20 are integrally raised.

In this way, the electromagnet assembly 60 is driven by the controller 42 to provide an actuation force for raising the rear ends of the inner body 20 and the hood 44.

In addition, the electromagnet assembly 60 may be controlled to serve to restore the rear ends of the inner body 20 and the hood 44 which are raised after the accident occurs to the original position.

To this end, the controller 42 drives the solenoid mechanism 35 in the reverse direction in the event of a collision (operation rod reversal operation) and at the same time the polarity of either the first electromagnet 61 or the second electromagnet 62 in the event of a collision accident. Is converted to the opposite polarity, in which the opposite ends of the first electromagnet 61 and the second electromagnet 62 control the application of current to the electromagnet coil so that they have opposite polarities.

In this restoration operation, the current control unit of the controller 42 applies a current to the first electromagnet 61 and the second electromagnet 62, but applies either of the two electromagnets in the opposite direction of the current flow direction as in the ascending operation. In this case, the opposite ends of the two electromagnets have the opposite polarity, so that a pulling force, that is, attraction force between the electromagnets is generated.

At this time, the first electromagnet 61 pulls down the second electromagnet 62 and lowers the rest of the inner body 20 and the rear end of the hood 44 to the original position during the restoration operation by the manpower generated. It becomes possible.

In the present invention, the above restoration operation may be set to be performed by a switch operation or automatically performed when a set time elapses. For example, when a driver or another operator operates a restoration switch (not shown) installed in a vehicle, the controller 42 A is to restore the operation of the electromagnet assembly 60 by receiving the operation signal of the restore switch, or automatically restore the operation of the electromagnet assembly 60 at the time point after the collision occurs.

Electromagnetic polarity conversion is industrially used and technical matters for the circuit configuration of the current control unit that applies current to the two electromagnets at a specific time point in the controller 42 and converts the flow direction of the electric current applied to the electromagnet, if necessary, As can be sufficiently implemented as a detailed description thereof will be omitted.

Hereinafter, the operating state of the actuator according to the present invention will be described with reference to FIGS. 7A to 7C.

Before a pedestrian crash

In the usual time before the pedestrian collision accident, the inner body 20 is in a lowered state as shown in FIG. 7A, and the striker s of the inner body 20 is locked by the latch 32.

In the state where the latch 32 is locked to the striker s in this manner, the latching end 32b of the latch 32 is caught by the first catching jaw 33a of the first detent 33 so that the latch 32 The rotation is constrained, and the first detent 33 is in a state where the distal end is caught by the third catching jaw 34a of the second detent 34.

In addition, the actuating rod 35a of the solenoid is advanced upward in the drawing, so that the second detent 34 is rotated upward in the drawing.

In case of a pedestrian crash Actuator  work( Inner Body  Increase)

When the collision detection sensor 40 detects a pedestrian collision, the collision detection signal is received by the controller 42 as described above, and the controller 42 drives the actuator 50.

The hood hinge assembly (not shown) is raised by the driving at this time, so that the rear end of the hood 44 coupled to the hood hinge assembly is raised.

In this process, the controller 42 controls the driving of the solenoid mechanism 35 so that the operating rod 35a is reversed, and controls the driving of the electromagnet assembly 60 to raise the inner body 20.

When the actuating rod 35a is reversed, the second detent 34 is pulled and rotated clockwise downward in the drawing, so that the first detent 33 is released and the first detent 33 is released. It is rotated clockwise by the elastic restoring force of the return spring 37.

As the first detent 33 is rotated as described above, the latch 32 is continuously released. As a result, the latch 32 is rotated in the clockwise direction by the elastic restoring force of the return spring 36. Locking is released.

In the state in which the locking of the striker s is released, the latch 32 is locked by the locking end 32b by the second locking jaw 33b of the first detent 33. The front end portion of the cast iron 33 is caught by the fourth catching jaw 34b of the second detent 34 and the rotation is constrained.

As described above, the lock state of the striker s is released and the electromagnet assembly 60 is driven under the control of the controller 42. The current is applied to the first electromagnet 61 and the second electromagnet 62 and the inner body is operated. Generate the operating force (magnetic force, repulsive force) to raise (20).

At this time, the current control unit of the controller 42 applies a current so that the ends of the first electromagnet 61 and the second electromagnet 62 have the same polarity, the inner body 20 by the repulsion between the two electromagnets The first electromagnet 61 fixed to the second rises from the second electromagnet 62, the inner body 20 is raised from the housing 10 by the lifting force of the first electromagnet 61, and eventually the hood 44 The rear end of is raised.

After pedestrian crash accident Actuator  restore( Inner Body  descent)

When the user operates the restoration switch or when the set time has elapsed, the controller 42 drives the solenoid mechanism 35 and the electromagnet assembly 60 of the actuator 50 in the reverse direction in case of an accident to lower the inner body 20. Restoring the lower end of the hood hinge assembly and hood 44 coupled to the inner body 20 through this.

In this process, the controller 42 controls the driving of the solenoid mechanism 35 so that the working rod 35a is advanced and controls the driving of the electromagnet assembly 60 to lower the inner body 20.

When the operating rod 35a is advanced, the second detent 34 is rotated counterclockwise while being pushed upward in the drawing, and the striker s of the inner body 20 is driven by the electromagnet assembly 60. While lowering, it is inserted into the recessed groove 31a of the base plate 31 and the locking groove 32a of the latch 32.

Further, while the striker s descends while being inserted into the locking groove 32a of the latch 32, the latch 32 is rotated counterclockwise to the striker lock position, wherein the first detent 33 It is rotated clockwise to the latch fixed position while being pushed upward on the drawing by the two detents 34.

After the latch 32, the first detent 33, and the second detent 34 are rotated in this way, the locking end 32b of the latch 32 is the first latching jaw 33a of the first detent 33. ), When the distal end of the first detent 33 is caught by the second catching jaw 33b of the second detent 34, the striker s of the inner body 20 is the locking groove of the latch 32. It is locked again in the state inserted in 32a.

In addition, the restoring operation of the electromagnet assembly 60 is performed, and a current is applied to the first electromagnet 61 and the second electromagnet 62 to generate an operating force (magnetic force, human force) for lowering the inner body 20. .

At this time, the current control unit of the controller 42 applies a current to the first electromagnet 61 and the second electromagnet 62, the flow direction of the current applied to the second electromagnet 62 (or the first electromagnet) during the collision accident The current in the opposite direction is applied.

Accordingly, end portions facing each other of the first electromagnet 61 and the second electromagnet 62 have opposite polarities to each other, thereby generating attraction, and the first electromagnet fixed to the inner body 20 by generating attraction between the two electromagnets. 61 is pulled toward the second electromagnet 62 and lowered.

As a result, the inner body 20, which was raised during the accident, descends integrally with the first electromagnet 61 in the housing 10, and the rear end of the hood 44 is restored to its original position.

The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are provided. Also included in the scope of the present invention.

10 housing 10a fastening portion
11: guide pin 12: connector
20: inner body 20a: fastening portion
21: guide slot 31: base plate
31a: recess groove 32: latch
32a: locking groove 32b: locking end
33: first detent 33a: first locking jaw
33b: second locking jaw 34: second detent
34a: third jammed jaw 34b: fourth jammed jaw
34c: slot hole 35: solenoid mechanism
35a: working rod 35b: connecting pin
36, 37, 38: return spring 40: collision detection sensor
42: controller 44: hood
50: actuator 60: electromagnet assembly
61: first electromagnet 62: second electromagnet

Claims (13)

In the actuator of the automotive active hood device for raising the rear end of the hood in accordance with the control signal of the controller receiving the collision detection signal of the collision detection sensor in the case of pedestrian collision,
A housing fixed to the vehicle body;
An inner body inserted into the housing so as to be lifted up and down and moving up and down with the rear end of the hood, and having a striker integrally fixed therein;
A latch mechanism installed in the housing to lock or release the striker of the inner body;
And an electromagnet assembly installed between the housing and the inner body to raise the inner body with the repulsive force generated between the electromagnets.
The method according to claim 1,
The electromagnet assembly,
A first electromagnet fixed to the inner body, the first electromagnet being provided to be movable up and down with the inner body;
And a second electromagnet fixed to the housing and disposed below the first electromagnet.
The first electromagnet and the second electromagnet are actuators of the active hood device for a vehicle, characterized in that the upper and lower portions are provided with a polarity of the N pole, S pole by the current applied under the control of the controller.
The method according to claim 2,
When the controller receives a collision detection signal of the collision sensor in the case of a pedestrian collision accident, the controller generates a repulsive force by controlling the application of current so that the opposite ends of the first electromagnet and the second electromagnet disposed up and down have the same polarity. Actuator of the active hood device for automobiles.
The method according to claim 2,
The controller generates an attractive force by controlling the application of current so that opposite ends of the first electromagnet and the second electromagnet disposed up and down when the inner body and the rear end of the hood are restored down have opposite polarities. Actuator of active hood device.
The method of claim 4,
And the controller controls the flow direction of the current applied to any one of the first electromagnet and the second electromagnet so as to be opposite to that of the pedestrian collision accident.
The method according to claim 1 or 2,
The electromagnet assembly is an actuator of an active hood device for a vehicle, characterized in that provided on both sides of the left and right of the latch mechanism inside the housing and the inner body.
The method according to claim 1,
The housing is an actuator of the active hood device for a vehicle, characterized in that the guide pin is mounted to guide the lifting movement of the inner body.
The method of claim 7,
The guide pin of the housing is penetrated and coupled to the guide slot formed vertically long in the inner body, the guide pin is moved along the guide slot of the inner body when the inner body is lifted to guide the lifting movement of the inner body Actuator of active hood device for automobile.
The method according to claim 1,
The latch mechanism,
A base plate fixed to the inner surface of the housing and having a recess groove into which a striker of the inner body can be lifted and lowered;
A latch rotatably installed on the base plate and locking or unlocking the striker inserted into the recess groove of the base plate;
A first detent rotatably mounted to the base plate to fix or release the latch in a striker lock state;
A second detent rotatably installed on the base plate and configured to fix or release the first detent in a latched state;
And a solenoid mechanism for rotating the second detent to the first detent lock release position in accordance with a control signal of the controller.
The method according to claim 9,
One side of the latch is formed with a locking groove that is inserted into the striker is inserted into the recess groove of the base plate, the locking end is formed on the other end of the latch protruding the engaging end of the second stop in the striker lock state Actuator of the active hood device for an automobile.
The method according to claim 9,
One side and the other side of the first detent first locking jaw to the latch end of the latch lock the striker to secure the latch in the striker lock state, and the latch is no longer rotated in the striker lock release position Actuator of the active hood device for a vehicle, characterized in that the second engaging jaw is formed so that the latch end of the latch is not rotated.
The method according to claim 9,
A third latching jaw in which a first end of the first detent is caught at a latching position in order to secure the first detent in a latched state to one side and the other side of the second detent, and the first detent is released from the latch Actuator of the active hood device for a vehicle, characterized in that each of the fourth engaging jaw is formed so that the front end of the first detent is no longer rotated in the rotated position.
The method according to claim 9,
And a connecting pin of an actuating rod which is operated forward and backward under the power supply control of the controller in the solenoid mechanism is fitted into the slot hole of the second detent.

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