JP6187288B2 - Front body structure of the vehicle - Google Patents

Description

  The present invention relates to a front body structure of a vehicle.

  When a vehicle collides forward with an external object such as a living body including a human body, a situation in which the external object rides on the hood often occurs. In this case, since a rigid body such as an engine exists below the bonnet, to protect external objects, for example, when a collision is detected, a priming agent is activated to lift the bonnet upward. Yes. That is, when an external object rides on a bonnet, the vertical distance between the bonnet and a rigid body existing below the bonnet is secured to mitigate the impact (see, for example, Patent Document 1). .

JP 2010-235040 A

  By the way, in a vehicle having a low bonnet, such as a sports car represented by an open car, for example, it is likely that an external object rides on the vicinity of the rear end portion of the bonnet. On the other hand, a hinge mechanism for opening and closing the bonnet is often provided at the vehicle width direction end portion of the rear end portion of the bonnet, and this hinge mechanism is interposed between the lower surface of the bonnet and the upper surface of the hinge rain. Will be.

  When the rear end of the bonnet and the apron rain are connected by a hinge mechanism, when an external object rides on the rear end of the bonnet at the time of a collision, the hinge mechanism tends to be displaced downward, but the hinge is a kind of rigid body The mechanism comes into contact with the upper surface of the apron rain at an early stage (an early bottoming occurs), making it difficult to displace the bonnet further downward.

  The present invention has been made in view of the above circumstances, and its purpose is to allow the bonnet to be displaced further downward by delaying bottoming of the hinge mechanism on the upper surface of the apron rain. It is an object of the present invention to provide a vehicle front body structure that can more effectively relieve an impact on an external object mounted on the vehicle.

In order to achieve the above object, the following first solution is adopted in the present invention. That is, as described in claim 1,
A vehicle front body structure in which a rear end portion of a bonnet is connected to an upper surface of a rear end portion of an apron rain by a hinge mechanism,
The hinge mechanism extends in the front-rear direction, and the rear end is connected to the apron rain so as to be able to swing around the rear fulcrum, and the front end can swing relative to the bonnet around the front fulcrum. A linear hinge arm connected to the
A concave portion is formed on the upper surface of the apron rain to partially receive the front portion of the hinge arm when the hinge arm of the hinge mechanism is displaced downward by receiving a downward external force ;
The recess is sized and deep to receive a front portion of the hinge arm;
On the lower surface of the hinge arm, when a front portion of the hinge arm is received in the recess, a notch for preventing this interference is formed at a portion that interferes with the rear edge of the recess.
It is like that.

According to the above first solution, the front part of the hinge arm of the hinge mechanism is partially received in the recess formed in the apron rain. By delaying the time when the bottom surface of the hood is bottomed out, the bonnet can be displaced more greatly downward, so that the impact on the external object riding on the hood can be more effectively mitigated. Although it is conceivable to form a hole for receiving the hinge mechanism on the upper surface of the apron rain, in this case, it is not preferable in terms of securing the strength (rigidity) of the apron rain, but in the present invention, it is a recess. There is no problem in securing the strength of the apron rain.

In addition to the above, the recess can receive the portion of the hinge mechanism that is displaced downward most, and the above-described effects can be obtained.

Furthermore, by using the notch, the hinge arm of the hinge mechanism can be more fully displaced downward, and the above-described effects can be more fully exhibited.

In order to achieve the above object, the following second solution is adopted in the present invention. That is, as described in claim 2,
A vehicle front body structure in which a rear end portion of a bonnet is connected to an upper surface of a rear end portion of an apron rain by a hinge mechanism,
The hinge mechanism extends in the front-rear direction, and the rear end is connected to the apron rain so as to be able to swing around the rear fulcrum, and the front end can swing relative to the bonnet around the front fulcrum. A linear hinge arm connected to the
A concave portion is formed on the upper surface of the apron rain to partially receive the front portion of the hinge arm when the hinge arm of the hinge mechanism is displaced downward by receiving a downward external force;
The hinge mechanism is
One end is connected to the intermediate portion of the hinge arm so as to be swingable around the first intermediate fulcrum, and the other end is swingable around the second intermediate fulcrum behind the front fulcrum. A connected auxiliary arm;
A temporary coupling portion that temporarily couples the auxiliary arm so as to always follow the hinge arm;
With
When the temporary coupling is released by applying an upward external force to the rear end portion of the bonnet, the auxiliary arm rises so that the rear end portion of the bonnet is swung upwardly about the front fulcrum. ,
The recess is set to a depth and size to receive at least the front of the hinge arm;
Ru Citea so. According to the second solution, the front part of the hinge arm of the hinge mechanism is partially received in the recess formed in the apron rain. By delaying the time when the bottom surface of the hood is bottomed out, the bonnet can be displaced more greatly downward, so that the impact on the external object riding on the hood can be more effectively mitigated. Although it is conceivable to form a hole for receiving the hinge mechanism on the upper surface of the apron rain, in this case, it is not preferable in terms of securing the strength (rigidity) of the apron rain, but in the present invention, it is a recess. There is no problem in securing the strength of the apron rain. Furthermore, by using the auxiliary arm, the rear end of the bonnet is positioned higher than in the normal use state, and a sufficient amount of displacement of the bonnet is ensured by this amount, so that the outside that is ridden on the bonnet The impact on the object can be reduced more effectively.

The preferred mode based on the second solution is as follows. That is,
The lower surface of the hinge arm is formed with a notch for preventing interference with the rear edge of the recess when the front end of the hinge arm is received in the recess.
(Corresponding to claim 3 ). In this case, using the notch, the hinge mechanism is more fully displaced downward, which is more preferable in reducing the impact on the external object.

  According to the present invention, the bonnet can be displaced downward by delaying the bottom of the apron rain of the hinge mechanism, and the impact on the external object can be mitigated more effectively.

The top view which shows the front part of the vehicle to which this invention was applied. The side view of FIG. The principal part perspective view in the state where the auxiliary arm stood up showing an example of the hinge mechanism. The figure which looked at the hinge mechanism and the apron rain from the upper part. The top view of the apron rain. The perspective view which shows the hinge mechanism in the state in which the auxiliary arm followed the hinge arm. Front sectional drawing in the connection part of a hinge arm and a bonnet. The principal part side surface sectional view which shows the state by which the front part of the hinge arm was received in the recessed part.

  1 and 2, the vehicle V is an open car, and can be selected between a closed state in which the upper part of the passenger compartment is covered by an openable and closable roof (not shown) and an open state in which the upper part of the passenger compartment is open. 1 and 2 show the open state. In the figure, 1 is a front window glass, 1 is a bonnet, and 3 is a front fender. In the embodiment, the bonnet 2 covers an engine room formed below the bonnet 2. In some cases, for example, the engine is rear-mounted, and the lower part of the bonnet 2 is used as a luggage compartment.

  The bonnet 2 is connected to the vehicle body through the hinge mechanism 10 so as to be opened forward. The hinge mechanism 10 will be described with reference to FIG. First, reference numeral 30 denotes an apron rain to which the front fender 3 is attached. As is known, the apron rain 30 is provided in a pair of left and right along the left and right ends of the bonnet 2 and extends long in the front-rear direction.

  A mounting bracket 11 is fixed to the upper surface of the rear end portion of the apron rain 30, and the rear end portion of the hinge arm 12 extending in the front-rear direction with respect to the mounting bracket 11 is swung by a pin 13 as a swing fulcrum. Connected as possible.

  On the other hand, a mounting bracket 14 is fixed to the lower surface of the vehicle width direction end portion of the rear end portion of the bonnet 2. The front end of the hinge arm 12 is connected to the mounting bracket 14 by a pin 15 as a swing fulcrum so as to be swingable. The pin 15 is slidable in a long hole 14 a formed in the mounting bracket 14.

  One end portion of the auxiliary arm 17 is slidably connected to the intermediate portion in the longitudinal direction of the hinge arm 12 by a pin 16 as a swing fulcrum. The other end of the auxiliary arm 17 is connected to the rear end of the mounting bracket 14 by a pin 18 as a swing fulcrum so as to be swingable. The auxiliary arm 17 is shorter than the hinge arm 12.

  3, a state where the hinge arm 12 is substantially parallel to the upper surface of the apron rain 30 is a closed position of the bonnet 2 in a normal state, and the hinge arm 12 is connected to the upper surface of the apron rain 30. With a predetermined distance. Of course, in this normal closed position, the bonnet 2 and the front fender 3 are aligned flush.

  A locking hole 19 is formed at a position behind the pin 16 in the hinge arm 12. The auxiliary arm 17 is brought into a state along the hinge arm 12 by fitting a part of the pin 18 into the locking hole 19. The position of the locking hole 19 is set on the swing locus of the pin 18 with the pin 16 as the center. The locking hole 19 and the pin 18 constitute a temporary coupling portion. In the temporary coupling state in which the pin 18 is fitted and locked to the locking hole 19, the operation of the hinge arm 12 is substantially performed. Only by this, the bonnet 2 is opened and closed.

  The auxiliary arm 17 can take a rising position indicated by a solid line in FIG. That is, when a large external force is applied to the bonnet 2 from the normally closed state of the bonnet 2, the temporarily connected state is released, that is, the pin 18 is disengaged from the locking hole 19. As indicated by a solid line 3, the auxiliary arm 17 rises (the hinge arm 12 is in a forwardly inclined state), and the rear end of the bonnet 2 is lifted upward as shown in FIG. 3. The auxiliary arm 17 is raised by operating, for example, a lifting mechanism (not shown) provided in a mounting hole 32 formed in the apron rain 30 at a position ahead of the hinge mechanism 10. . This lifting mechanism is activated when the sensor detects a forward collision, in particular, that an external object has been ridden on the hood 2. In addition, since various such lifting mechanisms have been proposed, further explanation is omitted.

  When a downward external force, particularly a load from an external object such as a living body riding on the bonnet 2 is applied to the rear end of the bonnet 2, the hinge arm 12 is displaced downward in a posture that causes the front arm to be lowered. And attempts to interfere (abut) with the upper surface of the apron rain 30. In order to delay the interference time (so that the front part of the hinge arm 12 can be displaced downward more greatly), a recess 31 is formed on the upper surface of the apron rain 30 as shown in FIG. The recess 31 is set to be larger in the front, rear, left and right areas than the area where the front part of the hinge arm 12 is supposed to interfere, and even if the hinge arm 12 is displaced downward in a slightly shifted state, the hinge arm is placed in the recess 31. Twelve fronts can be reliably received. A reduction in the strength (rigidity) of the apron rain 30 due to the formation of the concave portion 31 does not substantially occur. In the embodiment, the recess 31 is formed as an inclined surface so that the bottom wall portion thereof is a flat surface, and the peripheral edge portion of the bottom wall portion is gradually deepened toward the bottom wall portion. .

  When the front part of the hinge arm 12 is received in the recess 31 with the front arm lowered, there is a possibility that the intermediate part of the hinge arm 12 may interfere with the rear edge 31a of the recess 31. Therefore, a notch 12a for preventing interference is formed in a portion (lower surface) of the hinge arm 12 that may interfere with the rear edge 31a of the recess 31 (see particularly FIG. 8).

  In the above configuration, when a forward collision is detected at the normal closed position shown in FIG. 6, the lifting mechanism described above is activated, and the auxiliary arm 17 is raised as shown by the solid line in FIG. The rear end is a high position. While the bonnet 2 is displaced downwardly under the load of an external object that rides on the bonnet 2 (particularly on the rear end of the bonnet 2), the front part of the hinge arm 12 has a recess 31. By being received inside, the bonnet 2 can be displaced further downward, and the impact relaxation function is improved accordingly.

  Although the embodiments have been described above, the present invention is not limited to the embodiments, and appropriate modifications can be made within the scope of the claims. As the hinge mechanism 10, an appropriate structure can be applied in addition to those shown in the embodiment. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

  The present invention is preferable as a safety improvement technique at the time of a collision.

V: Vehicle 2: Bonnet 10: Hinge mechanism 11: Mounting bracket (apron rain side)
12: Hinge arm 13: Pin (back swing fulcrum of hinge arm)
14: Mounting bracket (bonnet side)
15: Pin (front pivot point of hinge arm)
16: Pin (swing fulcrum on the hinge arm side of the auxiliary arm)
17: Auxiliary arm 18: Pin (oscillating fulcrum on the bonnet side of the auxiliary arm)
19: Locking hole (for the temporary coupling portion where the pin 18 is fitted and locked)
30: Apron rain 31: Recess 31a: Rear edge

Claims (3)

A vehicle front body structure in which a rear end portion of a bonnet is connected to an upper surface of a rear end portion of an apron rain by a hinge mechanism,
The hinge mechanism extends in the front-rear direction, and the rear end is connected to the apron rain so as to be able to swing around the rear fulcrum, and the front end can swing relative to the bonnet around the front fulcrum. A linear hinge arm connected to the
A concave portion is formed on the upper surface of the apron rain to partially receive the front portion of the hinge arm when the hinge arm of the hinge mechanism is displaced downward by receiving a downward external force ;
The recess is sized and deep to receive a front portion of the hinge arm;
On the lower surface of the hinge arm, when a front portion of the hinge arm is received in the recess, a notch for preventing this interference is formed at a portion that interferes with the rear edge of the recess.
A vehicle front body structure characterized by that. A vehicle front body structure in which a rear end portion of a bonnet is connected to an upper surface of a rear end portion of an apron rain by a hinge mechanism,
The hinge mechanism extends in the front-rear direction, and the rear end is connected to the apron rain so as to be able to swing around the rear fulcrum, and the front end can swing relative to the bonnet around the front fulcrum. A linear hinge arm connected to the
A concave portion is formed on the upper surface of the apron rain to partially receive the front portion of the hinge arm when the hinge arm of the hinge mechanism is displaced downward by receiving a downward external force;
The hinge mechanism is
One end is connected to the intermediate portion of the hinge arm so as to be swingable around the first intermediate fulcrum, and the other end is swingable around the second intermediate fulcrum behind the front fulcrum. A connected auxiliary arm;
A temporary coupling portion that temporarily couples the auxiliary arm so as to always follow the hinge arm;
With
When the temporary coupling is released by applying an upward external force to the rear end portion of the bonnet, the auxiliary arm rises so that the rear end portion of the bonnet is swung upwardly about the front fulcrum. ,
The recess is set to a depth and size to receive at least the front of the hinge arm;
A vehicle front body structure characterized by that. In claim 2 ,
The lower surface of the hinge arm is formed with a notch for preventing interference with the rear edge of the recess when the front end of the hinge arm is received in the recess.
A vehicle front body structure characterized by that.

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