JPH1120741A - Car splash hood - Google Patents

Abstract

(57) [Problem] To provide a flip-up hood that can prevent the hood from moving rearward even when the hood collides with an oncoming vehicle or a wall in a state where the hood is flipped up. SOLUTION: A hood lifting mechanism 13 provided on both sides of a rear end portion of a hood main body and configured to jump up the rear end of the hood main body 11 by detecting a collision with an obstacle,
A hood-side hinge 18 fixed to the hood body 11 side;
A vehicle body side hinge 20 fixed to the vehicle body 19 side, a long groove 23a provided in the hood side hinge 18, an intermediate link 21 that slides along the long groove 23a and is rotatably supported by the vehicle body side hinge 20, The hood body 1 before the hood is flipped by engaging with the hood side hinge 18 provided at
1 is prevented from retreating, and the hood is raised while being engaged with the hood side hinge 18 even when the hood is flipped up.
And a rod 27 for preventing retraction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for absorbing and mitigating a shock when a running vehicle collides with an obstacle such as a pedestrian or the like, and the obstacle falls down on the upper surface of the hood and collide with the upper surface of the hood. The present invention relates to an automobile hood for protecting an obstacle.

[0002]

2. Description of the Related Art Conventionally, as a flip-up hood for an automobile, for example, there is one shown in FIGS.
70). The flip-up hood includes a hood main body 1, a hood lock device 2 provided at a tip 1a of the hood main body, and a hood flip-up mechanism 3 arranged below a rear end of the hood main body 1. The front end 1a side of the hood main body 1 is opened and closed by a hood lock device 2, and the rear end 1b side of the hood main body 1 is bounced by a spring mechanism 3 using a spring 4 at the same time when the vehicle collides with an obstacle. Can be raised. When the rear end 1b of the hood body 1 is flipped up, a clearance is formed between the structure in the engine room and the hood body 1, and when an obstacle falls down on the upper surface of the hood body 1, a secondary collision occurs. Shock can be absorbed and alleviated.

[0003] As another example of the lifting mechanism 3, as shown in FIG. 19, a pin 5 fixed to the vehicle body side is used.
The hood rear end 1b is supported by rotatably supporting the intermediate link 8 using the fulcrum as a fulcrum and sliding the intermediate link 8 into an elongated hole 7 provided in the hood-side hinge 6.
There was also a type that jumped up.

[0004]

However, in the above-described conventional flip-up hood of an automobile, the hood body 1
If the vehicle collides with an oncoming vehicle, a wall, or the like in a state in which the hood is raised, the hood main body 1 may move rearward.

Accordingly, an object of the present invention is to provide a flip-up hood for an automobile which can prevent the hood from moving rearward even when the hood is strongly bumped against an oncoming vehicle or a wall in a state where the hood is flipped up. .

[0006]

That is, in order to solve the above-mentioned problems, the feature of the flip-up hood of the vehicle according to the present invention is that the hood, a hood lock device provided at the front end of the hood, an obstacle, and the like. Collision detecting means for detecting a collision of the hood, an actuator which operates in response to a signal from the collision detecting means, and which is provided on both sides of the rear end of the hood and is connected to the actuator to flip up the rear end of the hood In a flip-up hood of an automobile including a hood flip-up mechanism, the hood flip-up mechanism includes a hood side hinge fixed to a hood side, a vehicle body side hinge fixed to a vehicle body side, and the hood side hinge or the vehicle body side hinge. A groove provided in one of them, an intermediate link that slides along the groove and is rotatably supported by the other, A rod that engages with the hood-side hinge or the hood to prevent retraction of the hood before the hood is flipped up, and prevents the hood from retracting by rising while engaging with the hood-side hinge or the hood when the hood is flipped up It consists of

According to a second aspect of the present invention, the flip-up hood of the automobile is characterized in that the hood flip-up mechanism is a hood-side hinge fixed to the hood, a vehicle-body hinge fixed to the vehicle body, and the hood-side hinge. A groove provided in the
An intermediate link that slides along the groove and is rotatably supported by the vehicle body side hinge; a key provided in the groove to restrict sliding of the intermediate link; and a hood-side hook provided in the intermediate link. A hood retraction preventing stopper provided on the rear vehicle body side of the hood side hinge to prevent retraction of the hood before being flipped up, wherein the intermediate link is engaged with the key portion at the time of flipping up, and the hood side hook portion is the It is to engage with the hood side hinge or the hood and maintain the actuator in the operating state.

According to a third aspect of the present invention, the flip-up hood for an automobile is characterized in that the hood flip-up mechanism is a hood-side hinge fixed to the hood side, a vehicle-side hinge fixed to the vehicle body, and the vehicle-side hinge. A groove provided in the groove, an intermediate link that slides along the groove and is rotatably supported by the hood-side hinge, and a key that is provided in the groove and regulates sliding of the intermediate link and lowers the intermediate link. A hood-side hook portion provided on the hood side of the intermediate link, a vehicle-body-side hook portion provided on the vehicle body side of the intermediate link, and a hood main body provided on a rear body side of the hood-side hinge before the hood is flipped up. A hood retraction preventing member for preventing the retraction of the intermediate link is provided. And, the vehicle body-side hook portion with the hood-side hook portion is engaged with the hood-side hinge or the hood is to engage the vehicle body.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an automobile hood according to the present invention. FIG.
FIG. 9 to FIG. 9 show a first embodiment of a flip-up hood for a vehicle according to the present invention. 1 and 2 show a state where the hood main body 11 is opened at the time of inspection inside the engine room. A hood lock device 12 for opening and closing the hood main body 11 is provided at a front end of the hood main body 11, and a hood flipping mechanism 13 for rotating the hood main body 11 is provided at a rear end of the hood main body 11. The hood of the automobile is the hood body 11
A hood lock device 12, collision detection means for detecting a collision with an obstacle, an actuator (not shown) which operates in response to a signal from the collision detection means, provided on the left and right of the rear end of the hood main body 11. And a flip-up mechanism 13 connected to an actuator. When the collision with an obstacle is detected, the actuator is activated and the rear end of the hood body 11 is flipped up through the flip-up mechanism 13. When the rear end of the hood main body 11 is flipped up with the hood main body 11 closed, the hood main body 11 rotates around the hood lock device 12 as a fulcrum, and the structure between the engine room structure and the hood main body 11 is moved. Cause clearance. By this clearance, the impact when the obstacle falls down on the upper surface of the hood main body 11 and makes a secondary collision with the upper surface of the hood main body 11 can be absorbed and reduced.

FIG. 3 shows an example of the configuration of a control system that operates an actuator when a collision with a pedestrian is detected. A bumper sensor 14 is provided at a front end of the vehicle. The bumper sensor 14 includes a contact switch or the like that conducts a contact when compressed by a collision load input from the front, and detects a collision with a pedestrian. A vehicle speed signal is detected by a vehicle speed sensor 15 from a rotation speed signal from a speed meter or an ABS tire. Next, signals from the vehicle speed sensor 15 and the bumper sensor 14 are controlled by the controller 16 to operate the actuator 17. FIG. 4 is a flowchart illustrating a control method of the controller 16. First, it is determined by the vehicle speed sensor 15 whether the vehicle speed V is equal to or higher than the set vehicle speed (S
1) Then, if the vehicle speed V is equal to or higher than the set vehicle speed, it is determined whether or not the bumper sensor 14 has detected a collision (S2).
When a collision is detected, the actuator 17 of the flip-up hood of the automobile is operated (S3).

FIGS. 5 to 8 show details of the flip-up mechanism 13. FIG. The flip-up mechanism 13 includes a hood side hinge 18 connected to the rear end of the hood body 11, a vehicle body side hinge 20 connected to the vehicle body 19, and an intermediate member provided between the hood side hinge 18 and the vehicle body side hinge 20. And a link 21. Hood side hinge 18 and intermediate link 21
Is connected rotatably using a hood-side pin 22, and a long groove 23a is provided in the hood-side hinge 18,
The hood-side pin 22 is slidable along the long groove 23a. At the front end of the long groove 23a, a key portion 23b is formed in an upward direction. When the hood main body 11 is flipped up, the hood side pin 22 slides, and a state in which the hood side pin 22 is engaged with the key portion 23b and flipped up. Will be maintained. The vehicle body side hinge 20 and the intermediate link 21 are rotatably connected near the center of the intermediate link 21 using a vehicle body side pin 24. The lower end of the intermediate link 21 is rotatably connected to a cable 26 connected to an actuator (not shown) and a cable side pin 25. At the rear of the hood-side hinge 18, a rod 27 slidable only in the vertical direction with respect to the vehicle body 19 is provided. The top 27a of the rod 27 engages with a jaw 18a provided at the rear end of the hood-side hinge 18,
The front end of the top 27 a of the rod 27 contacts the hood-side hinge 18. The rearward movement of the hood body 11 is restricted by the contact surface between the hood-side hinge 18 and the top 27a of the rod 27. Further, the hood side pin 22 is pressed against the rear end of the long groove 23a by a pin lock member 29 using the force of a spring 28, and the movement of the hood main body 11 in the front direction and the vertical direction is regulated.

During normal running, the hood body 11 is fixed by the left and right flip-up mechanisms 13 and the hood lock device 12 at the front end of the hood body 11. Further, as described above, the movement of the rear end portion of the hood main body 11 in the front-rear direction and the vertical direction is restricted by the flip-up mechanism 13. Therefore, the hood body 11 is securely restrained by the vehicle body 19, and the hood 11 and the flip-up mechanism 13 do not rattle during traveling.

FIG. 7 shows a state in which the rear end of the hood body 11 is flipped up. When the vehicle collides with an obstacle at a vehicle speed higher than the set speed while the vehicle is traveling, the controller 16 controls signals sent from the vehicle speed sensor 15 and the bumper sensor 14 as described in FIG. The actuator pulls the lower end of the intermediate link 21 via the cable 26 to rotate the intermediate link 21 about the vehicle body side pin 24. When the intermediate link 21 rotates, the hood side pin 22 tends to be pushed upward. At this time, the hood side pin 22 is pressed by the pin lock member 29 using the spring force of the spring 28, but the force of the actuator that raises the hood side pin 22 overcomes the pressing force of the pin lock member 29. The hood side pin 22 is pushed up. As the hood-side pin 22 is pushed upward, the rear end of the hood main body 11 rises with the hood lock device 12 at the front end as a fulcrum. When the intermediate link 21 further rotates, the hood-side pin 22 is pushed upward, and the hood-side pin 22 slides forward in the long groove 23a, and the key portion 23b
To reach. If it moves to the key part 23b, the hood side pin 2
2, the rotation of the intermediate link 21 also stops,
The splashing of the hood body 11 also stops. Further, as the rear end of the hood body 11 rises, the top 27
a rises while engaging with the hood-side hinge 18 and is always located at the rear part of the hood-side hinge 18. Here, as the actuator, a pretensioner or the like that draws a cable by energy of gunpowder or the like is used, but a spring may be used, a cylinder using air pressure, hydraulic pressure, energy such as gunpowder, or an air bag may be used. The used one may be used.

FIG. 8 shows the flip-up mechanism 13 with the hood body 11 opened. When opening the hood main body 11 for inspection in the engine room or the like, the hood lock device 12 at the front end of the hood main body 11 is unlocked and the front part of the hood main body 11 is lifted. At this time, the hood side pin 22 is restricted from moving up and down and back and forth by the rod 27 and the pin lock member 29, and the hood side hinge 18 is rotatable about the hood side pin 22. Reference numeral 11 rotates around the hood side pin 22 as a fulcrum. As a result, the hood 11 is opened, and inspection and the like in the engine room can be performed.

FIGS. 9 to 11 show a case where the flip-up hood of the automobile of the present invention collides with an oncoming vehicle, a wall or the like. FIG. 9 shows a case where a collision occurs during normal running before the hood body 11 is flipped up. In this figure, when a load is applied from the front, the load is distributed to the hood lock device 12 at the front end of the hood main body 11 and the left and right flip-up mechanisms 13 at the rear end of the hood. At this time, in the hood rear end left and right flip-up mechanism 13, the dispersed load from the front is transmitted to the rod 27 via the hood side hinge 18, but the rod 27 is restricted from moving in the front-rear direction by the vehicle body 19. Therefore, the hood main body 11 is prevented from retreating. When a load is further applied, the hood main body 11 is moved around the hood lock device 12 and the rods 27 on the left and right ends of the hood at the fulcrum.
1 is bent in a V-shape around a bead 30 provided near the center. Therefore, the hood main body 11 can be prevented from entering the windshield.

FIGS. 10 and 11 show a case where the hood body 11 is flipped up by colliding with an obstacle and then colliding with an oncoming vehicle or a wall. Also in this case, the load from the front is applied to the hood lock device 12 at the front end of the hood 11.
The load is distributed to the right and left rear end lifting mechanisms 13 of the hood body 11. At this time, in the spring-up mechanism 13, the load is applied to the hood side hinge 18, the hood side pin 22, and the intermediate link 2.
1. Acts on the actuator via the vehicle body side pin 24, the cable side pin 25 and the cable 26. Since the actuator maintains the tension, the backward movement of the hood main body 11 can be restricted. When a load is further applied, the hood 11 is bent in a V-shape by a fold bead 30 provided near the center of the hood 11 with the hood lock device 12 and the hood-side pin 12 serving as fulcrums. For this reason, the hood main body 11 can be prevented from entering the windshield.

FIG. 11 shows a case where the hood-side pin 22 for supporting the load at the time of a collision is damaged for some reason in a state of being flipped up. As shown in FIG. 7, even when the hood 11 is flipped up, the rod 27 stays in the hood side hinge 18.
While being engaged. Therefore, the hood side pin 2
Even if the hood 2 is broken and the hood main body 11 and the hood side hinge 18 move rearward, the hood main body 11 and the hood side hinge 18 hit the raised rod 27 to restrict the rearward movement. When a load is further applied, as shown in FIG. 11, the hood main body 11 has a hood lock device 12 and rods 27 on the left and right ends of the hood as fulcrums, and has a dogleg shape by a bent bead 30 near the center of the hood main body 11. The hood body 11 can be prevented from entering the windshield.

FIGS. 12 to 14 show a second embodiment of the flip-up hood of an automobile according to the present invention. Also in this embodiment, the flip-up mechanism 13 includes a hood-side hinge 18 coupled to the rear end of the hood main body 11 and the vehicle body 1.
9 and the hood side hinge 1
Intermediate link 2 provided between the vehicle body hinge 8 and the vehicle body side hinge 20
It consists of 1. The hood-side hinge 18 and the intermediate link 21 are rotatably connected using a hood-side pin 22, and the hood-side hinge 18 is provided with a long groove 23a, along which the hood-side pin 22 can slide. become. At the front end of the long groove 23a, a key portion 23b is formed upward. When the hood body 11 is flipped up, the hood-side pin 22 slides, and is engaged with the key portion 23b to maintain the flipped-up state. The vehicle body side hinge 20 and the intermediate link 21 are rotatably connected near the center of the intermediate link 21 using a vehicle body side pin 24. Intermediate link 2
The lower end of 1 is rotatably connected to a cable 26 connected to an actuator (not shown) and a cable side pin 25. A rearward movement preventing member 31 coupled to the vehicle body 19 is provided at a rear portion of the hood side hinge 18 in a state of being in contact with the hood side hinge 18. Hood body 11
Is regulated by the rearward movement preventing member 31. Further, the hood side pin 22 is pressed against the rear end of the long groove 23a of the pin lock member 29 using the force of the spring 28, and the movement of the hood main body 11 in the front direction and the up and down direction is regulated. A hood-side hook 32 is provided at the hood-side end of the intermediate link 21.
When the intermediate link 21 rotates, the hook 32 and the hole 33 (see FIG. 14) provided in the hood-side hinge 18 are engaged.

FIG. 14 shows a state in which the flip-up mechanism having the above configuration is flipped up. When the intermediate link 21 rotates during the flip-up, the hood-side hook 32 provided on the intermediate link 21 enters the hole 33 provided on the hood-side hinge 18 and engages with the hood-side hinge 18. Further, in this embodiment, the strength of the hood side pin 22 that supports the load at the time of collision is relatively weak with respect to other components such as the intermediate link 21, the vehicle body side pin 24, the cable side pin 25, and the cable 26. It has been set.

When the vehicle collides with an oncoming vehicle, a wall, or the like during normal running, the load from the front is applied to the hood lock device 12 at the front end of the hood main body 11 and the hood lifting mechanism 13 at the left and right ends of the hood, as in the first embodiment. Load is distributed. At this time,
In the hood lifting mechanism 13 on the left and right ends of the hood, the load acts on the rearward movement preventing member 31 located behind the hood side hinge 18 via the hood side hinge 18, thereby preventing the hood main body 11 from retreating. Further, when a load is applied, the hood main body 11 is supported by the hood lock device 12 and the rearward movement preventing member 31 as a fulcrum, and the hood main body 11 is bent by a folding bead 30 provided near the center of the hood main body 11, as in the first embodiment. It bends in a letter shape. Therefore, it is possible to effectively prevent the hood main body 11 from entering the windshield.

A case where a frontal collision occurs after the flip-up will be described. When the hood body 11 collides with an oncoming vehicle, a wall, or the like after being flipped up, a load from the front due to the collision is applied to the hood 11 as in the first embodiment, and the hood 11 and the flip-up mechanism 13 are applied to the hood 11. Load is distributed. At this time, as shown in FIG. 14, the load acting on the flip-up mechanism 13 is applied to the actuator via the hood side hinge 18, the hood side pin 22, the middle link 21, the vehicle body side pin 24, the cable side 25 and the cable 26. And regulates the backward movement of the hood main body 11. When a load is further applied, the hood main body 11 is bent in a V-shape by a fold bead 30 provided near the center of the hood main body 11 with the hood lock device 12 and the hood side pin 22 serving as fulcrums. Effectively prevent entry into the glass. Here, in the collision load transmission path, the strength of the hood side pin 22 is set to be relatively weaker than other parts, so that the hood side pin 22 is damaged for some reason at the time of collision, and the hood body 11 and the hood side hinge 18 are damaged. Attempts to move rearward, but hits the hood side hook 32 provided on the intermediate link 21 to restrict the rearward movement of the hood body 11. As a result, the hood 11 is bent in a V-shape with the hood lock device 12 and the hood side hooks 32 on the left and right ends of the hood as fulcrums, thereby preventing the hood main body 11 from entering the windshield.

FIGS. 15 and 16 show a third embodiment of the flip-up hood of an automobile according to the present invention. Also in this embodiment, the flip-up mechanism 13 includes the hood main body 1.
A hood-side hinge 18 coupled to the rear end of the vehicle body 1;
Body side hinge 20 and hood side hinge 18
Link 21 provided between the vehicle and the vehicle body side hinge 20
Consists of The hood side hinge 18 and the intermediate link 21 are rotatably connected using a hood side pin 22. The vehicle body side hinge 20 and the intermediate link 21 are rotatably connected near the center of the intermediate link 21 using a vehicle body side pin 24, and the vehicle body side hinge 20 is provided with a long groove 23a.
The vehicle body side pin 24 slides along the long groove 23a. At the rear end of the long groove 23a, a key 23
b is formed. When the hood main body 11 is flipped up, the vehicle body side pin 24 slides and engages with the key portion 23b, and the flipped up state is maintained and the intermediate link 21 is lowered. The lower end of the intermediate link 21 is rotatably connected to the cable 26 connected to the actuator and the cable side pin 25. A rearward movement preventing member 31 coupled to the vehicle body 19 is provided at a rear portion of the hood side hinge 18 in contact with the hood side hinge 18. Hood body 11
Is regulated by the rearward movement preventing member 31. Further, the hood side pin 22 is fixed to the rearward movement preventing member 3 by a pin lock member 29 using the force of a spring 28.
1, the movement of the hood main body 11 in the front direction and the vertical direction is regulated. A hood side hook 32 is provided at a hood side end of the intermediate link 21, and a vehicle body side hook 34 is provided at a vehicle body side end.

FIG. 16 shows the state when the flip-up hood is flipped up in the third embodiment. When the vehicle collides with an obstacle at a speed higher than the set speed while the vehicle is running, FIG.
As shown in (1), the controller 16 controls signals sent from the vehicle speed sensor 15 and the bumper sensor 14 to operate the actuator 17. The actuator 17 pulls the lower end of the intermediate link 21 via the cable 26, rotates the intermediate link 21 about the vehicle body side pin 24, and slides the vehicle body side pin 24. Intermediate link 2
When 1 rotates, the hood side pin 22 tends to be pushed upward. At this time, the hood side pin 22 is
Is pressed down by the pin lock member 29 utilizing the spring force of (2), but the force of the actuator for raising the hood side pin 22 overcomes the pressing force of the pin lock member 29, and the hood side pin 22 is pushed upward. As the hood side pin 22 is pushed upward,
The rear end of the hood main body 11 rises around the hood lock device 10 at the front end of the hood main body 11 as a fulcrum. As the rotation of the intermediate link 21 proceeds, the vehicle body side pin 24 slides backward in the long groove 23a, and at the end of the flip-up, the key portion 23b
And falls into the key portion 23b. At this time, the vehicle body side hook 35 gets over the stopper 35 and engages with the stopper 35 connected to the vehicle body side. Further, the rotation link 21 takes an upright posture, and the hood side hook 32 engages with the rear end of the hood side hinge 18. Also, in this embodiment,
The strength of the hood side pin 22 that supports the load at the time of collision is set relatively weaker than other components such as the intermediate link 21, the vehicle body side pin 24, the cable side pin 25, and the cable 26.

When the vehicle collides with an oncoming vehicle, a wall, or the like during normal running, a load is applied to the hood body 11 from the front due to the collision, and the load is applied to the hood lock device 1 at the front end of the hood body 11.
2 and the hoods on the left and right ends of the hood are distributed to the flip-up mechanism 13. At this time, since the load acts on the rearward movement preventing member 31 connected to the vehicle body 19 via the hood-side hinge 18, the hood main body 11 is not further retracted. further,
When a load is applied, the hood main body 11 uses the hood lock device 12 and the rearward movement prevention member 31 as fulcrums,
1 is bent in a U shape by a bead 30 provided in the vicinity of the center. Therefore, it is possible to effectively prevent the hood main body 11 from entering the windshield.

In the third embodiment, a description will be given of a case where a collision with an oncoming vehicle or a wall occurs after the hood main body 11 is flipped up. As in the first embodiment, a load due to a collision acts on the hood main body 11, and the load is distributed to the hood lock device 12 and the hood flip-up mechanism 13. At this time, as shown in FIG. 16, the load acting on the flip-up mechanism 13 is transmitted to the hood hinge 18, the hood pin 22, the middle link 21, the vehicle body pin 24, the vehicle body hook 34, and the stopper 35. Then, the rearward movement of the hood main body 11 is restricted. Accordingly, the rearward movement of the hood main body 11 can be prevented without using the low-rigidity cable 26. When a load is further applied, the hood main body 11 is bent in a V-shape by a fold bead 30 provided near the center of the hood main body 11 with the hood lock device 12 and the hood side pin 22 serving as fulcrums. It can be prevented from entering the glass. Here, in the collision load transmission path, the strength of the hood side pin 22 is set to be relatively weaker than other parts, so that if the hood side pin 22 is damaged for some reason at the time of collision, the hood body 11 and the hood side hinge 18 tries to move rearward, but hits the hood side hook 32 provided on the intermediate link 21 to restrict the rearward movement of the hood main body 11. This allows the hood 1
1, the hood main body 11 is bent in a V-shape with the hood lock device 12 and the hood side hooks 34 on the left and right ends of the hood as fulcrums.

[0026]

As described above, according to the present invention, the hood flipping mechanism includes a hood side hinge fixed to the hood side, a vehicle body side hinge fixed to the vehicle body side.
A groove provided in one of the hood-side hinge and the vehicle-body-side hinge, an intermediate link that slides along the groove and is rotatably supported by the other, and the hood-side hinge or the hood provided in the vehicle body To prevent the hood from retreating before the hood jumps up,
Since the hood is composed of a hood side hinge or a rod that rises while being engaged with the hood when the hood is lifted and prevents the hood from retreating, in any state from before the flip-up to after the flip-up, it may collide with an oncoming vehicle, a wall, or the like. Also, the rod restricts the rearward movement of the hood, so that the hood can be prevented from retreating, and as a result, the hood can be prevented from contacting the windshield.

The hood flipping mechanism includes a hood side hinge fixed to the hood side, a vehicle body side hinge fixed to the vehicle body side, and a groove provided in the hood side hinge.
An intermediate link that slides along the groove and is rotatably supported by the vehicle body side hinge; a key provided in the groove to restrict sliding of the intermediate link; and a hood-side hook provided in the intermediate link. A hood retraction preventing stopper provided on the rear vehicle body side of the hood side hinge to prevent the hood from retreating before being flipped up, wherein the intermediate link is engaged with the key portion at the time of flipping up, and the hood side hook portion is Engage with the hood-side hinge or the hood, and maintain the operating state of the actuator, so that even if it collides with an oncoming vehicle or a wall in a flipped-up state, the load applied to the hood is transmitted to the actuator and the hood retreats. It can be effectively prevented. Furthermore, since the hood-side hook of the intermediate link and the hood-side hinge or hood are engaged, even if some of the components of the flip-up mechanism are damaged for some reason, the hood can be reliably prevented from retreating.

Further, the hood flipping mechanism slides along the hood side hinge fixed to the hood side, the vehicle body side hinge fixed to the vehicle body side, a groove provided in the vehicle body side hinge, and the groove. An intermediate link rotatably supported by the hood side hinge, a key portion provided in the groove portion for restricting slide of the intermediate link and lowering the intermediate link, and a hood side hook provided on the hood side of the intermediate link. A hook portion provided on the vehicle body side of the intermediate link, and a hood retraction preventing member provided on the rear vehicle body side of the hood side hinge to prevent the hood from being retracted before the hood is raised. At the same time, the slide of the intermediate link is regulated by the key portion and the rotating link descends, and the hood side hook portion is connected to the hood side hinge or The hood engages with the hood, and the vehicle-body-side hook engages with the vehicle body. Therefore, even if the vehicle collides with an oncoming vehicle or a wall in a flipped-up state, the load applied to the hood can be reduced without passing through a low-rigidity cable. Can also be transmitted to the vehicle body side, and the hood can be prevented from moving backward without maintaining the operating state of the actuator. Furthermore, since the hood-side hook of the intermediate link and the hood-side hinge or hood are engaged, even if some of the components of the flip-up mechanism are damaged for some reason, the hood can be reliably prevented from retreating.

[Brief description of the drawings]

FIG. 1 is an overall schematic view showing a flip-up hood of an automobile according to the present invention.

FIG. 2 is a perspective view showing a hood lock device.

FIG. 3 is a configuration diagram of a control system that operates an actuator.

FIG. 4 is a flowchart illustrating a control example of a controller.

FIG. 5 is a plan view of a flip-up mechanism showing a flip-up hood according to a first embodiment of the present invention.

FIG. 6 is a sectional view of a flip-up mechanism showing a first embodiment of the flip-up hood.

FIG. 7 is a cross-sectional view of the flip-up hood of the first embodiment, showing a flip-up state of a flip-up mechanism.

FIG. 8 is a cross-sectional view showing a state in which a hood main body is opened in the flip-up hood of the first embodiment.

FIG. 9 is a cross-sectional view showing a state in which a frontal collision has occurred in the flip-up hood of the first embodiment before the flip-up mechanism is flipped up.

FIG. 10 is a perspective view of the flip-up hood of the first embodiment.
It is sectional drawing which shows the state at the time of a frontal collision after the flip-up mechanism of the flip-up mechanism.

FIG. 11 is a perspective view of the flip-up hood of the first embodiment;
It is sectional drawing which shows the case where the hinge side pin of the flip-up mechanism is damaged.

FIG. 12 is a plan view of a flip-up mechanism showing a flip-up hood according to a second embodiment of the present invention.

FIG. 13 is a sectional view of a flipping mechanism showing a second embodiment of the flipping hood.

FIG. 14 is a perspective view of the flip-up hood of the second embodiment.
FIG. 4 is a cross-sectional view showing a flip-up mechanism in a flip-up state.

FIG. 15 is a plan view of a flip-up mechanism according to a third embodiment of the flip-up hood according to the present invention.

FIG. 16 is a sectional view of a flipping mechanism showing a third embodiment of the flipping hood.

FIG. 17 is an overall view of a conventional flip-up hood of an automobile.

FIG. 18 is an enlarged view of a portion A in FIG. 17;

FIG. 19 is a cross-sectional view illustrating a conventional mechanism for raising a hood of a vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Hood main body 12 Hood lock device 13 Flipping mechanism 18 Hood side hinge 19 Body 20 Body side hinge 21 Intermediate link 27 Rod 31 Backward movement prevention member 32 Hood side hook 34 Body side hook

Claims (3)

[Claims] 1. A hood body, a hood lock device provided at a front end of the hood body, collision detection means for detecting a collision with an obstacle, and an actuator which operates upon receiving a collision signal from the collision detection means And a hood flipping mechanism provided on both sides of the rear end of the hood body and connected to the actuator to flip up the rear end of the hood body, wherein the hood flipping mechanism is located on the hood side. A fixed hood side hinge, a vehicle body side hinge fixed to the vehicle body side, a groove provided in one of the hood side hinge or the vehicle body side hinge, and sliding along the groove and rotating to the other side The intermediate link to be supported and the hood side hinge provided on the vehicle body side or the hood main body engage with the hood before the hood is raised. Food retracted thereby preventing the body, lift-up of the motor vehicle, characterized in that it consists of a rod for preventing retraction of the hood hinge or elevated hood body remains engaged with the hood body during lift-up hood hood. 2. A hood main body, a hood lock device provided at a front end of the hood main body, collision detection means for detecting collision with an obstacle, and an actuator which operates upon receiving a collision signal from the collision detection means. And a hood flipping mechanism provided on both sides of the rear end of the hood body and connected to the actuator to flip up the rear end of the hood body, wherein the hood flipping mechanism is located on the hood side. A fixed hood-side hinge, a body-side hinge fixed to the vehicle-body side, a groove provided in the hood-side hinge, and an intermediate link that slides along the groove and is rotationally supported by the vehicle-body-side hinge. A key portion provided in the groove portion for restricting sliding of the intermediate link; and a hood-side hook portion provided in the intermediate link, A hood retraction preventing stopper provided on the rear vehicle body side of the hood side hinge to prevent retraction of the hood body before being flipped up, wherein the intermediate link is engaged with the key portion at the time of flipping up and the hood side hook portion is A flip-up hood for an automobile, wherein the flip-up hood is engaged with a hood-side hinge or the hood main body to maintain an operating state. 3. A hood main body, a hood lock device provided at a front end of the hood main body, collision detection means for detecting a collision with an obstacle, and an actuator which operates upon receiving a collision signal from the collision detection means. And a hood flipping mechanism provided on both sides of the rear end of the hood body and connected to the actuator to flip up the rear end of the hood body, wherein the hood flipping mechanism is located on the hood side. A fixed hood-side hinge, a vehicle-body-side hinge fixed to the vehicle-body side, a groove provided in the vehicle-body-side hinge, and an intermediate link that slides along the groove and is rotatably supported by the hood-side hinge. A key portion provided in the groove portion for restricting sliding of the intermediate link and lowering the intermediate link; A hood-side hook portion provided on the vehicle side, a vehicle-body-side hook portion provided on the vehicle body side of the intermediate link, and a hood-side hinge provided on the rear vehicle body side to prevent the hood body from retreating before the hood is flipped up. A hood retraction preventing member, wherein the slide of the intermediate link is regulated by a key portion at the time of flipping up and the rotating link is lowered, and the hood side hook portion engages with the hood side hinge or the hood main body, and A flip-up hood for a motor vehicle, wherein a vehicle body-side hook engages with the vehicle body.