JPH11310158A - Impact absorbing device for vehicle hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely protect an abutting member by making it possible to absorb impacts even at high collision speeds. SOLUTION: This device includes a collision detection means, an actuator 5 performing the action of lifting the rear of a hood 2 according to a detection signal of the collision detection means, and a hinge mechanism 6 capable of lifting the rear of the hood 2 according to the actuation of the actuator 5. The hinge mechanism 6 comprises at least two hinge links 7, 8, one end of one 7 of the two hinge links 7, 8 being freely rotationally connected to the rear end of the hood 2, and one end of the other hinge link 8 being freely rotationally connected to a vehicle body 13. The other end of the one hinge link 7 and the other end of the other hinge link 8 are freely rotationally connected together by a pin 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact absorbing device for a vehicle hood, which can sufficiently absorb an impact even if it collides with an abutting object on a road at a particularly high speed. The present invention relates to an impact absorbing device for a vehicle hood that can protect various on-vehicle devices in an engine room, such as an accessory and an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, some proposals have been made as a shock absorbing device for a vehicle hood (Japanese Patent Laid-Open No. 59-26).
370 and JP-A-58-21975), all of which are designed to mechanically lift the hood by an impact at the time of collision with an abutting object.

For example, FIG.
In the vehicle described in Japanese Patent No. 26370, when an abutting object on the road collides with the front end of the hood 01 while the vehicle is running, a load is applied to the hood 01 rearward of the vehicle due to the first impact at the time of the collision. The load is a bracket fixed to the hood 01
02 through the safety pin 03 bolt part 03a, hinge link 04
Is transmitted to the tip portion 04a.

[0004] Then, the hinge link 04 rotates about the pin 05 to the position indicated by the chain line, and the hood 01 is retreated upward and rearward to receive the abutting object riding on the hood. A posture that can be done. At this time, the leaf spring portion 03b of the safety pin 03 bends, and its distal end is
It comes off from the concave portion 06a of the locking member 06 fixed to 02.

Next, when the contact object rides on the hood 01, a downward load is generated on the upper surface of the hood 01 by the second impact at the time of the ride, and the safety pin 03 is caused by this load.
The leaf spring portion 03b is bent in a direction to return to the original state while absorbing the impact, and the hood 01 is moved downward.

[0006] In this way, the contact object is protected as much as possible from the impact due to the collision with the vehicle hood 01. However, since the contact hood 01 is retracted upward and rearward with a delay after the collision of the contact object with the hood 01, the protection of the contact object from the second impact is delayed.

[0007]

As described above, in the prior art, it takes a long time to lift the hood after the contact object on the road collides with the hood. In this case, since the hood cannot be lifted before the abutting object collides with the hood, the impact may not be sufficiently absorbed.

The present invention solves such a problem, and can lift the hood before the abutting object on the road collides with the hood even at a high collision speed, and sufficiently absorbs the impact. It is an object of the present invention to provide an impact absorbing device for a hood for a vehicle, which can reliably protect an abutting object from an impact.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a shock absorbing device for a vehicle hood which solves the above-mentioned problems, and the invention described in claim 1 is for opening and closing a front portion of the hood. The vehicle has a hood lock mechanism that is fixed to the vehicle body as possible, a vehicle hood shock absorbing device is provided at a predetermined location of the vehicle, and a collision detection unit that detects a collision with a contact object or a possibility of collision. An actuator that performs an operation of lifting the hood rear portion based on a detection signal of the collision detection unit; and a hinge mechanism that can lift the hood rear portion based on operation of the actuator. One end of one of the two hinge links is rotatably connected to a rear end of the hood. One end of the other hinge link of the two hinge links is rotatably connected to the vehicle body, and the other end of the one hinge link and the other end of the other hinge link rotate. An impact absorbing device for a vehicle hood, which is freely connected.

[0010] In the first aspect of the present invention, as described above, the collision detecting means detects a collision or a possibility of collision with the contacting object, and the actuator is actuated based on the detection signal. The hood can be actuated, and the hinge mechanism can be actuated based on the actuation of the actuator to lift the rear portion of the hood.

Therefore, the rear portion of the hood can be lifted before the contact object on the road collides with the hood.
Even in the case of a high collision speed, it is possible to sufficiently absorb the impact when the contact object on the road collides with the hood, and it is possible to reliably protect the contact object from the impact of the collision with the hood. Further, various on-vehicle devices in an engine room such as an internal combustion engine can be protected.

Also, since the hinge mechanism is provided, the upward lifting operation of the hood rear portion is smooth. Further, when the hood lock mechanism is released for maintenance and the like to open and close the front part of the hood, the hinge mechanism also functions as a support means for rotatably supporting the rear end of the hood. The opening and closing operation of the hood front part and the lifting operation of the hood rear part performed by detecting the collision or the possibility of collision of the abutting object on the road with the vehicle can be made compatible. Is not complicated.

The hinge mechanism comprises at least two hinge links, and one end of one of the two hinge links is rotatably connected to a rear end of the hood. One end of the other hinge link of the two hinge links is rotatably connected to the vehicle body, and the other end of one hinge link is rotatably connected to the other end of the other hinge link. Therefore, by pushing the connecting portion at the other end of the two hinge links to open a large angle between the two hinge links, it is possible to increase the amount of lifting of the rear portion of the hood. By folding at a small angle,
The hinge mechanism can be housed in a small size, and its mechanism and structure are simple.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment (Embodiment 1) of the invention described in claim 1 of the present application shown in FIGS. 1 to 4 will be described below. FIG. 1 is a perspective view of a four-wheeled vehicle to which the shock absorbing device for a vehicle hood according to the first embodiment is applied, and FIG. 2 is a left side showing a state in which the four-wheeled vehicle of FIG. FIG. 3 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of the vehicle hood shock absorbing device of FIG. 1, and FIG. 4 is an operating state of the vehicle hood shock absorbing device. FIG.

In FIG. 1, a vehicle (four-wheeled vehicle) 1 to which a vehicle hood shock absorbing device according to a first embodiment is applied is provided between a vehicle body and a front left and right center of a hood 2.
A well-known hood lock mechanism 3 is provided.

The shock absorbing devices of the hood 2 are disposed at two positions on the left and right of the front end of the vehicle 1 and detect collisions of a bumper due to a collision (collision detecting means).
4, 4 and actuators 5, 5 disposed at two lower left and right positions near the rear end of the hood 2, and an operation of lifting the rear portion of the hood 2 upward based on the operation of these actuators 5, 5. And left and right hinge mechanisms 6, 6 for performing the operation.

Since the left and right actuators 5, 5 and the left and right hinge mechanisms 6, 6 have exactly the same structure, the left actuator 5 and the left hinge mechanism 6 will be described below with reference to FIG. , Their structure and connection configuration will be described.

The actuator 5 is of a pneumatic type having a built-in gas generator and has a buffering function. The lower base end of the cylinder is not shown in detail, but swings with respect to the vehicle body. The piston rod 9 is movably mounted, and projects upward and rearward of the vehicle. The actuator 5 is not limited to the pneumatic type, and any other type may be used as long as it has a buffering action.

The hinge mechanism 6 includes two hinge links 7,
One end of one of the hinge links 7 is rotatably connected to the rear end of the hood 2 by a pin 10, and the other end of the other hinge link 8 is connected by a pin 11 to an upper member 13 of the vehicle body. The other end of one hinge link 7 and the other end of the other hinge link 8 are rotatably connected by a pin 12.

Although not shown in detail, the hood 2 is located at the left of its rear end, and at a predetermined position in a space formed by an upper hood member 2a and a lower hood member 2b constituting the hood 2. Are rotatably connected to the pin 10. Reference numeral 38 denotes a part of the vehicle body adjacent to the rear end of the hood 2.

Next, the operation of the first embodiment will be described. Now, as shown in FIG.
When the collision occurs, the collision detection sensor 4 detects the collision and generates a signal. Then, the actuator 5 is actuated by this signal to push up the piston rod 9 rearward and upward.

The rearward upward projection of the piston rod 9 causes the connecting point (position of the pin 12) of the two hinge links 7 and 8 to move in the same direction, thereby increasing the pinch angle α of the hinge links 7 and 8. Therefore, the rear end of the hood 2 is lifted upward with the hood lock mechanism 3 at the front end of the hood 2 serving as a fulcrum (see a chain line in FIG. 4).

As a result, even if the contact object 14 suddenly collides with the vehicle 1 and gets on the hood 2, the rear portion of the hood 2 has already been lifted upward. Objects can be received with less impact.

Next, the hood 2 sinks due to the load of the abutting object. The sinking speed of the hood 2 is moderate due to the buffering action of the actuator 5 and the clearance between the hood 2 lifted upward and the internal combustion engine or the like. Is sufficiently secured, and the hood 2 does not bottom on them, so that the abutment receives little impact from the hood 2 during the sinking process.

When the hood lock mechanism 3 is released and the front part of the hood 2 is opened / closed for maintenance or the like, the pin 10 of the hinge mechanism 6 is used as a rotation axis.
The hood 2 can be opened and closed.

The first embodiment is configured as described above,
Since the operation is performed as described above, the following effects can be further obtained. Collision detection sensor (collision detection means)
4, a collision with the abutting object 14 on the road is detected, the actuator 5 is operated based on the detection signal, and the hinge mechanism 6 is operated based on the operation of the actuator 5, so that the rear portion of the hood 2 is moved. Can be lifted.

Therefore, the rear portion of the hood 2 can be lifted before the abutment 14 on the road collides with the hood 2, so that the abutment 14 on the road can be used even at a high collision speed.
The impact of the collision of the hood 2 with the hood 2 can be sufficiently absorbed, and the contact object can be reliably protected from the impact of the collision with the hood 2. Further, various on-vehicle devices in an engine room such as an internal combustion engine can be protected.

Also, since the hinge mechanism 6 is provided, the upward lifting operation of the rear portion of the hood 2 is smooth, and the pin 10 releases the hood lock mechanism 3 for maintenance or the like. When opening and closing the front portion of the hood, it also functions as a support pin (rotating shaft) for rotatably supporting the rear end portion of the hood 2, so that the hood for maintenance and the like can be maintained while maintaining good maintenance workability. 2
And a lifting operation of the rear portion of the hood 2 performed by detecting a collision of the abutting object 14 on the road with the vehicle 1, and a mechanism for both these operations. The structure does not become complicated.

Further, the hinge mechanism 6 comprises two hinge links 7, 8, one end of one hinge link 7 is rotatably connected to the rear end of the hood 2 by a pin 10, and the other end is connected to the other end. One end of the hinge link 8 is rotatably connected to an upper member 13 or the like of the vehicle body by a pin 11, and the other end of one hinge link 7 and the other end of the other hinge link 8 are rotated by a pin 12. Since the two hinge links 7 and 8 are freely connected, the connection point (the position of the pin 12) at the other end of the hinge links 7 and 8 is pushed, and the pinch angle α of the hinge links 7 and 8 is set.
When the hood 2 is opened widely, the amount of lifting of the rear portion of the hood 2 can be increased.
The hinge mechanism 6 can be stored in a small size, and its mechanism and structure are simple.

Next, another embodiment (Embodiment 2) of the invention described in claim 1 of the present application shown in FIG. 5 will be described. The shock absorbing device for a vehicle hood according to the second embodiment differs from the first embodiment only in the mounting direction of the hinge mechanism and the actuator.

That is, as shown in FIG. 5, the hinge mechanism 15 and the actuator 5 in the second embodiment are used.
Uses all the components of the hinge mechanism 6 and the actuator 5 in the first embodiment, but differs only in the mounting direction, and the pin 12 is located rearward of the vehicle with respect to the pin 10 and the pin 11. The hinge mechanism 15 and the actuator 5 are arranged. The above points are
Although it is different from the first embodiment, there is no difference from the first embodiment in other points, and thus the detailed description is omitted.

The second embodiment is configured as described above and operates in the same manner as in the first embodiment to achieve the same effects. However, when viewed from above the vehicle, the hood 2 Since the hinge mechanism 15 is not located below, the clearance between the hood 2 and the internal combustion engine or the like can be easily secured, and the impact of the contacting object falling on the hood 2 can be more reliably absorbed. .

Next, still another embodiment (third embodiment) of the invention described in claim 1 of the present application shown in FIG. 6 will be described. The shock absorbing device for a vehicle hood according to the third embodiment differs from the first embodiment only in the configuration of the hinge mechanism.

That is, as shown in FIG. 6, the hinge mechanism 16 according to the third embodiment includes three hinge links 7, 8, and 17, and the hinge mechanism 6 according to the first embodiment.
A third hinge link 17 is interposed between the piston rod 9 and the third hinge link 17. One end of the hinge link 17 is rotatably connected to the pin 12 (the connection point of the other ends of the hinge links 7 and 8), and the other end is turned to the tip of the piston rod 9 via the pin 18. They are freely connected. Although the above is different from the first embodiment, there is no difference from the first embodiment in other points, and thus detailed description is omitted.

The third embodiment is configured as described above, and operates and has the same effects as the first embodiment.
Since it is interposed between the connection point (position of the pin 12) of the hinge links 7, 8 and the piston rod 9, the connection point can be operated via the third hinge link 17. Thus, the degree of freedom in layout of the actuator 5 is improved.

Next, still another embodiment (Embodiment 4) of the invention described in claim 1 of the present application shown in FIG. 7 will be described. The shock absorbing device for a vehicle hood according to the fourth embodiment differs from the third embodiment only in the mounting direction of the hinge mechanism and the actuator.

That is, as shown in FIG. 7, the hinge mechanism 19 and the actuator 5 in the fourth embodiment are used.
Uses all the components of the hinge mechanism 16 and the actuator 5 according to the third embodiment, but differs only in the mounting direction, so that the pins 12 and 18 are located behind the pins 10 and 11 in the vehicle. Thus, the hinge mechanism 19 and the actuator 5 are arranged. Although the above is different from the third embodiment, there is no difference from the third embodiment in other points, and thus the detailed description is omitted.

The fourth embodiment is configured as described above, and operates and has the same effects as the third embodiment. However, when viewed from above the vehicle, the hood 2 has Since the hinge mechanism 19 is not located below, the clearance between the hood 2 and the internal combustion engine or the like can be easily secured, and the impact of the contact object falling on the hood 2 can be more reliably absorbed. .

Next, still another embodiment (Embodiment 5) of the invention described in claim 1 of the present application shown in FIG. 8 will be described. The shock absorbing device for a vehicle hood according to the fifth embodiment differs from the third embodiment only in the configuration of the actuator.

That is, the actuator 5 in the third embodiment is a cylinder-piston actuator such as a pneumatic actuator. In the fifth embodiment, the actuator 5 is disposed between the actuator and the third hinge link 17. Further, a guide member 21 is interposed. In this case, the type of the actuator is not limited.

The other end of the third hinge link 17 is rotatably connected to the guide member 21 via a pin 18, and the guide member 21 is fixed to the vehicle body by an actuator (not shown). 8 along the guide rail 22
, Can slide left and right. Although the above is different from the third embodiment, there is no difference from the third embodiment in other points, and thus the detailed description is omitted.

Accordingly, when the guide member 21 is now moved rightward in FIG. 8 along the guide rail 22 by an actuator (not shown), the third hinge link 17 is pushed upward and rearward of the vehicle via the pin 18. Then, in the same manner as in the third embodiment, the rear portion of the hood 2 is lifted upward.

The fifth embodiment is configured as described above, operates in the same manner as in the third embodiment, and can achieve the same effects.
Since the operation is performed by the guide member 21 that slides along the guide rail 22, the operation is reliable, and the hinge mechanism 20 operates reliably, and the rear portion of the hood 2 can be lifted upward with strong force. .

Next, still another embodiment (sixth embodiment) of the invention described in claim 1 of the present application shown in FIG. 9 will be described. The shock absorbing device for a vehicle hood according to the sixth embodiment differs from the fifth embodiment only in the mounting direction of the hinge mechanism and the actuator.

That is, as shown in FIG. 9, the hinge mechanism 23 and the actuator section in the sixth embodiment are the same as the hinge mechanism 20 and the actuator section (including the guide member 21 and the guide rail 22) in the fifth embodiment. The hinge mechanism 23 and the actuator are arranged such that all the parts are used, but only the mounting direction is different, and the pins 12 and 18 are located behind the pins 10 and 11 in the vehicle. . The above points are different from the fifth embodiment, but the other points are the fifth embodiment.
Since there is no difference from the above, detailed description is omitted.

The sixth embodiment is configured as described above and operates in the same manner as the fifth embodiment, and can achieve the same effect. However, when viewed from above the vehicle, the hood 2 has Since the hinge mechanism 23 is not located below, the clearance between the hood 2 and the internal combustion engine or the like can be easily secured, and the impact of the contacting object falling onto the hood 2 can be more reliably absorbed. .

Next, still another embodiment (seventh embodiment) of the invention described in claim 1 of the present application shown in FIG. 10 will be described. The impact absorbing device for a vehicle hood according to the seventh embodiment differs from the fifth embodiment only in the arrangement of the actuator unit.

That is, as shown in FIG. 10, the hinge mechanism 24 and the actuator section in the seventh embodiment are the same as the hinge mechanism 20 and the actuator section (including the guide member 21 and the guide rail 22) in the fifth embodiment. All the components are used, and only the mounting position of the actuator part is different. This is because the space is defined by the upper hood member 2a and the lower hood member 2b that constitute the hood 2 at the rear left side of the hood 2. At predetermined locations. Although the above is different from the fifth embodiment, there is no difference from the fifth embodiment in other respects, and thus the detailed description is omitted.

Therefore, when the guide member 21 is moved rightward in FIG. 10 along the guide rail 22 by an actuator (not shown), the third hinge link 17 is pushed downward and rearward of the vehicle via the pin 18. However, since the connection point (position of the pin 12) of the two hinge links 7 and 8 is pushed rightward in FIG. 10, the same operation as in the fifth embodiment is performed, and the rear portion of the hood 2 moves upward. Can be lifted.

The seventh embodiment is configured as described above, and operates and has the same effects as the fifth embodiment. However, the actuator including the guide member 21 and the guide rail 22 The installation space of the unit can be saved, and the space efficiency can be improved.

Next, still another embodiment (Eighth Embodiment) of the invention described in claim 1 of the present application shown in FIGS. 11 to 13 will be described. The impact absorbing device for a vehicle hood according to the eighth embodiment includes the first to seventh embodiments.
Only the point of action of the actuator or the tip of the actuator portion and the configuration of the hinge mechanism are different from those of the first embodiment.

That is, in each of the first to seventh embodiments, the tip of the actuator 5 or the actuator portion is connected to the tip of the piston rod 9 or the guide member 21 directly or indirectly through the third hinge link 17. The hinge 5 is rotatably connected to the connection point (position of the pin 12) of the two hinge links 7 and 8, and the respective hinges are raised so that the rear portion of the hood 2 is lifted upward. In addition, the action point at the tip of the actuator section is the connection point of these two hinge links 7 and 8 or the point where the pin 18 of the third hinge link 17 is provided. The action point at the tip of the actuator 5 is set at a predetermined position in the rear part of the hood 2.

The predetermined portion at the rear of the hood 2 is shown in FIG.
As shown in FIG. 3, the lower hood member 2b on the rear left side of the hood 2 is provided with a hole 34 formed at a predetermined position. This hole 34 can receive a key-shaped hook 33 attached to the tip of the piston rod 9 and hook and lift it.

Therefore, when the abutment 14 collides with the vehicle 1 and receives a force that causes the hood 2 to move backward, the force is used to make a hole in the hole 34 at the initial operation of the actuator 5. The hook 33 received is securely hooked into the hole 34, and the rear end of the hood 2 can be reliably lifted upward by the subsequent operation of the actuator 5.

In the eighth embodiment, the hinge mechanism 25
Consists of three hinge links or hinge arms 26, 27, 28, of which hinge link 26 is located at the center.
The hinge link 27 is rotatably connected to the upper member 13 and the like of the vehicle body by a pin 30 and is rotatably connected to the upper member 13 of the vehicle body by a pin 31.

Since the pin 31 can move in the slide groove 32 formed on the hinge link 27 side, the hinge link 26 and the hinge link 27 can freely expand and contract. The hinge link 26 arranged at the center is rotatably connected to a hinge arm 28 fixed to the lower hood member 2b of the hood 2 by a pin 29. The hinge arm 28 forms one link of the hinge with respect to the pin 29.

The hinge mechanism 25 is normally folded and stored as shown in FIG.
When the abutting object 14 collides with the vehicle 1 and the collision detection sensor 4 detects the collision, and the actuator 5 is actuated by the detection signal, the piston rod 9 extends upward, and the hook 33 at the tip thereof extends. Enters the hole 34 of the hood 2,
As described above, since the rear portion of the hood 2 is lifted upward, as shown in FIG. 12, the hinge mechanism 25 is opened to regulate the upward lifting amount of the hood 2.

At this time, the hinge link 26 and the hinge link
It extends in a straight line with 27 and has a hinge link 26
And the hinge arm 28 are open at an acute angle. Although the above is different from the first to seventh embodiments, there is no difference from the first to seventh embodiments in other respects, and thus the detailed description is omitted.

Embodiment 8 is configured as described above,
Since the above-described operation is performed, the same effect as that of the first embodiment can be obtained. However, since the hinge mechanism 25 includes three hinge links or hinge arms 26, 27, and 28, the hood 2 , The amount of upward lifting can be increased.

The slide groove 32 formed in the hinge link 27 can shorten the overlapping length of the three hinge links or the hinge arms 26, 27, 28 when the hinge mechanism 25 is folded. Space can be saved and storage is easier.

Further, since the layout is performed without connecting the piston rod 9 of the actuator 5 and the hinge mechanism 25, the respective arrangements are facilitated and the degree of freedom of the layout is improved.

Further, the hinge link 26 and the hinge arm 28
The pin 29 that rotatably connects the hood 2 and the hood lock mechanism 3 is normally released for maintenance and the like.
When the front part of the hood 2 is opened and closed, it can also function as a support pin (rotating shaft) that rotatably supports the rear end of the hood 2.

Next, still another embodiment (ninth embodiment) of the invention described in claim 1 of the present application shown in FIG. 14 will be described. The shock absorbing device for a vehicle hood according to the ninth embodiment differs from the eighth embodiment only in the configuration of the hinge mechanism.

That is, as shown in FIG. 14, the hinge mechanism 35 in the ninth embodiment uses a hinge link 36 shorter than the hinge link 27 in place of the hinge link 27 of the hinge mechanism 25 in the eighth embodiment. The position at which one end of the vehicle body is attached to the upper member 13 or the like is also moved to the rear of the vehicle. The hinge link 36 does not have a slide groove.

When the piston rod 9 of the actuator 5 is extended and the rear part of the hood 2 is lifted upward, the hinge link 26 and the hinge link 36 form a straight line. The hinge arm 28 is attached to the lower hood member 2b of the hood 2, the upper member 13 of the vehicle body, and the like so as to form an angle of about 90 °. Reference numeral 37 denotes a regulating member that is held by the hinge link 36 and regulates the maximum angle between the hinge link 26 and the hinge link 36. Although the above is different from the eighth embodiment, there is no difference in the other points from the eighth embodiment, and thus the detailed description is omitted.

Since the ninth embodiment is configured as described above, the ninth embodiment operates in the same manner as the eighth embodiment and can achieve the same effect. However, the upward lifting amount of the hood 2 is further increased. The hinge mechanism 35 can be folded and stored in a smaller size at normal times. In addition, since the rear portion of the hood 2 can be lifted upward without using a slide mechanism, the operation of the hinge mechanism 35 becomes smooth.

In the first to ninth embodiments, the collision detecting sensor (collision detecting means) 4 detects the collision with the abutting object of the vehicle. If the possibility of collision with the hood is detected, it is possible to more reliably lift the rear portion of the hood up before the contact object on the road collides with the hood. Can be more reliably protected. A radar, a camera, or the like can be used as the collision detection sensor in this case.

[Brief description of the drawings]

FIG. 1 is a perspective view of a four-wheeled vehicle to which a shock absorbing device for a vehicle hood according to an embodiment (Embodiment 1) of the invention described in claim 1 of the present application is applied.

FIG. 2 is a left side view showing a state where the four-wheeled vehicle of FIG. 1 has collided with a contact object.

FIG. 3 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of the impact absorbing device for a vehicle hood according to the first embodiment of FIG. 1;

FIG. 4 is a view showing an operation state of the impact absorbing device for the vehicle hood.

FIG. 5 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of an impact absorbing device for a vehicle hood according to another embodiment (Embodiment 2) of the invention described in claim 1 of the present application. is there.

FIG. 6 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of a shock absorbing device for a vehicle hood according to still another embodiment (Embodiment 3) of the invention described in claim 1 of the present application. It is.

FIG. 7 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of an impact absorbing device for a vehicle hood according to still another embodiment (Embodiment 4) of the invention described in claim 1 of the present application. It is.

FIG. 8 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of an impact absorbing device for a vehicle hood according to still another embodiment (Embodiment 5) of the invention described in claim 1 of the present application. It is.

FIG. 9 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of an impact absorbing device for a vehicle hood according to still another embodiment (Embodiment 6) of the invention described in claim 1 of the present application. It is.

FIG. 10 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of a shock absorbing device for a vehicle hood according to still another embodiment (Embodiment 7) of the invention described in claim 1 of the present application. It is.

FIG. 11 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of a shock absorbing device for a vehicle hood according to still another embodiment (Embodiment 8) of the invention described in claim 1 of the present application. It is a figure which shows the state at the time of storage.

FIG. 12 is a diagram showing a state at the time of the operation.

FIG. 13 is a diagram showing an engagement state between a hook at the tip of an actuator and a hole in a hood in the eighth embodiment in FIG.

FIG. 14 is a left side view showing a schematic configuration of a portion including an actuator and a hinge mechanism of an impact absorbing device for a vehicle hood according to still another embodiment (ninth embodiment) of the invention described in claim 1 of the present application. FIG. 7 is a diagram showing a state at the time of operation.

FIG. 15 is a diagram showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vehicle (4-wheel vehicle), 2 ... Hood, 2a ... Upper hood member, 2b ... Lower hood member, 3 ... Hood lock mechanism, 4 ... Collision detection sensor (collision detection means), 5 ... Actuator, 6 ... Hinge mechanism , 7, 8 ... hinge link, 9 ... piston rod, 10-12 ... pin, 13 ... upper member (vehicle body), 14 ... abutment, 15, 16 ... hinge mechanism, 17 ...
Hinge link, 18 pin, 19, 20 hinge mechanism, 21 guide member, 22 guide rail, 23-25 hinge mechanism, 2
6, 27 hinge link, 28 hinge arm, 29-31 pin, 32 slide groove, 33 hook, 34 hole, 35 hinge mechanism, 36 hinge link, 37 regulating member, 38 body.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hideaki Nakamichi 1-4-1 Chuo, Wako-shi, Saitama

Claims (1)

[Claims] An impact absorbing device for a vehicle hood, provided with a hood lock mechanism for fixing a front portion of the hood to a vehicle body so as to be openable and closable, is disposed at a predetermined position of the vehicle, and is provided with a collision with an abutting object. A collision detection unit that detects a possibility of collision; an actuator that performs an operation of lifting a hood rear portion based on a detection signal of the collision detection unit; and a hinge mechanism that can lift the hood rear portion based on operation of the actuator. The hinge mechanism comprises at least two hinge links, and one end of one of the two hinge links is rotatably connected to a rear end of the hood; One end of the other hinge link of the two hinge links is rotatably connected to the vehicle body, and the other end of the one hinge link and Square with the other end of the hinge link, the shock absorbing device for a vehicle hood, characterized in that it is rotatably connected.