JP5444546B2 - Vehicle hood structure - Google Patents

Description

  The present invention relates to a structure of a front opening type hood that opens and closes a front portion of a vehicle.

For example, a sedan-type passenger car includes a hood that opens and closes an engine room at the front of the vehicle. This hood is a front-opening hood that is often opened and closed by displacing the front side up and down, and is supported so that it can be opened and closed up and down via a hinge part with the rear side of the engine room (vehicle body side). . The front-opening hood is locked at a position where the engine room is closed by a hood lock mechanism provided at the front of the engine room.
About this food | hood, various devices are made | formed in order to absorb the impact at the time of vehicle front collision, or to aim at the pedestrian protection in that case. For example, the following patent document discloses a so-called pop-up hood technique. This pop-up hood protects pedestrians by flipping up the hinge while slightly reversing the rear part of the hood by slightly rotating the hinge to the open side with a relatively small impact at the time of frontal collision (relaxation of impact at the time of secondary collision) It is the structure which aims at. In the case of this pop-up hood, when the big impact is received by the vehicle front part, the device for restrict | limiting further that the hood which jumped up further reverse | retreats to the vehicle interior side is also made | formed. For example, as disclosed in Patent Document 1 below, the conventional retraction restricting structure is configured to engage the hood that is flipped up at two front and rear stopper members provided on the body side, or disclosed in Patent Documents 2 and 3. As described above, in addition to the hinge portion, a link mechanism, a stopper mechanism, and the like are added to restrict the rotation of the hinge portion in the opening direction, thereby restricting the backward movement of the hood.
In addition, as a countermeasure against a large impact, a technique (buckling method) that buckles the hood upward and regulates its retreat is known, but in this buckling method, the hood is It was configured not to have a pop-up function that assumed a relatively small impact that would not cause buckling.

JP 2009-96339 A Japanese Patent No. 3320681 JP 2007-62490 A

As described above, in the conventional hood structure, when the rear part of the hood is flipped up mainly against a relatively small impact as a pedestrian protection measure, the hood is prevented from retreating when receiving a larger impact. For this reason, it is necessary to add a separate hood retraction restricting means such as two front and rear stopper members or a complicated link mechanism or stopper mechanism, which complicates the configuration and increases the cost. It was. Further, when the hood is configured to buckle as a countermeasure when receiving a large impact, there is a problem that the countermeasure when receiving a relatively small impact is not sufficient.
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and the hood retraction regulating means for regulating the hood retraction after the conventional pop-up has a configuration in front of the vehicle without incurring a complicated configuration and a large cost increase. When a relatively small impact is received, the rear side of the hood is raised to protect the pedestrian, while when a large impact is received, the hood is buckled so that its retreat can be reliably controlled. The object is to be able to cope with impacts of any size.

The above problem is solved by the following invention.
1st invention is the structure of the front opening type hood supported by the front part of the vehicle body via the hinge part so that opening and closing is possible, Comprising: As for the hinge part, the hinge arm by the side of a hood is via a hinge pin. The vehicle body side hinge base is configured so as to be rotatable. A reference load F0 is set for a load applied to the hinge pin via the hinge arm due to an impact received by the front portion of the vehicle body. When the impact F1 smaller than the reference load F0 is received, the hinge arm rotates and the rear side of the hood is flipped up. When the impact F2 greater than the reference load F0 is received, the hinge arm is against the hinge base. The hood structure is configured such that the rotation of the hinge arm is restricted by moving backward in the impact input direction.
According to the first invention, when the impact received on the front portion of the vehicle is the impact F1 smaller than the reference load F0, the hinge portion rotates and the rear side of the hood is mainly flipped up, thereby protecting the pedestrian. It is done. On the other hand, when the impact received on the front portion of the vehicle is an impact F2 larger than the reference load F0, the hinge arm of the hinge portion moves backward in the impact input direction with respect to the hinge base. Since the hinge arm moves backward in the impact input direction with respect to the hinge base, its rotation is restricted, and the hood is buckled, for example, by the reaction force generated as a result, and the large impact F2 is absorbed.
Thus, according to the first aspect of the invention, it is possible to cope with both the case where the impact received by the front portion of the vehicle is the small impact F1 and the case where the impact is the large impact F2. In addition, according to the first invention, when a large impact F2 is received, the rotation of the hinge arm is used to restrict its rotation, so that conventional stopper members and configurations at multiple locations are complicated. The retraction of the hood can be regulated without adding a link mechanism or a stopper mechanism that causes a large cost increase, and the hood can be buckled, and the large impact F2 can be reliably absorbed.
According to a second aspect of the present invention, there is provided a front-opening hood structure that is supported by a front portion of a vehicle body through a hinge portion so as to be opened and closed vertically. The hinge portion includes a hinge arm on the hood side via a hinge pin. It has a structure that is rotatably coupled to the hinge base on the vehicle body side, and a pin relief portion is provided in a circular support hole through which the hinge pin is rotatably inserted for one or both of the hinge base and the hinge arm, This pin relief portion allows the hinge pin to enter and allows the hinge arm to enter when the load applied to the hinge pin via the hinge arm due to the impact received by the front portion of the vehicle body is greater than or equal to a predetermined reference load F0. This is a hood structure configured to retreat in the direction of impact input with respect to the base.
According to the second invention, for example, a large impact is applied to the front portion of the vehicle due to a frontal collision of the vehicle, and as a result, the load applied to the hinge pin reaches the reference load F0 or more, so that the hinge pin enters the pin relief portion. As a result, the hinge arm moves backward in the impact input direction with respect to the hinge base. The hinge arm moves backward with respect to the hinge base to restrict the rotation of the hinge arm. As a result, the hood is buckled by the reaction force generated as a result, and the large impact F2 is absorbed.

According to a third aspect of the present invention, in the second aspect, when the impact received by the front portion of the vehicle body is smaller than the reference load F0, the pin relief portion restricts entry of the hinge pin to support the hinge pin. The hinge arm can rotate while being held inside, but when the impact received by the front part of the vehicle body is a large impact greater than the reference load F0, the hinge pin is allowed to enter and the hinge pin is relatively supported. The hood structure is configured such that the hinge arm is retracted in an impact input direction by being detached from the hole.
According to the third invention, the pin relief portion is communicated with the support hole of the hinge pin. The pin relief portion is formed in a width dimension smaller than the diameter of the hinge pin (diameter of the support hole) and has a function of restricting movement in the radial direction.
When the load applied to the hinge pin due to the impact received by the front part of the vehicle reaches the reference load F0, the hinge pin moves relatively wide while pushing the both sides of the pin relief part in the width direction. It is set to the width dimension that will be. For this reason, when the impact received by the front portion of the vehicle is a small impact F1 and the load applied to the hinge pin is smaller than the reference load F0, the hinge pin cannot enter the pin relief portion, so the hinge pin is in the support hole. When the hinge arm is held in a rotatable state while the impact received by the front portion of the vehicle is a large impact F2 and the load applied to the hinge pin is equal to or greater than the reference load F0, the impact causes the hinge pin to move. The pin escape portion is relatively deformed in the direction of pushing the pin escape portion and relatively enters the pin escape portion, whereby the hinge arm is retracted and its rotation is restricted.
In this way, the hinge pin is provided with a relief portion having a predetermined width dimension in the support hole of the hinge pin, and when receiving a small impact F1 without incurring a large cost increase, the hinge arm is rotated to pop up the hood. When a large impact F2 is received, the hinge arm can be retracted to buckle the hood, and both the case where the impact applied to the front of the vehicle is smaller than the reference load and the case where the impact is large can be accommodated. it can.
The pin relief portion for retracting the hinge arm can be provided in one or both of the support hole on the hinge arm side and the support hole on the hinge base side.
According to a fourth invention, in the first or third invention described above, when the hinge arm moves backward with respect to the hinge base due to a large impact F2, the hinge arm rotates by engaging with a stopper portion provided on the hinge base. It is a hood structure with a regulated configuration.
According to the fourth invention, when a large impact F2 is applied to the front portion of the vehicle body, the hinge arm is engaged with the stopper portion of the hinge base by utilizing the backward movement of the hinge arm with respect to the hinge base and rotated. It is possible to absorb a large impact F2 with a simple configuration that regulates the above and without incurring a large cost increase.

1 is a schematic plan view of a vehicle including a hood structure according to an embodiment of the present invention. It is the side view which looked at the hood structure which concerns on this embodiment from the arrow (II) direction in FIG. It is a side view which compares and shows a hood closed state, a hood flip-up state, and a hood buckling state about the hood structure concerning this embodiment. FIG. 4 is a cross-sectional view taken along line (IV)-(IV) in FIG. 2, and is a vertical cross-sectional view of a hinge portion having a first coupling form. It is a side view of the hinge part provided with the 1st coupling form. In this figure, the coupled state is schematically shown with the hinge arm and the hinge base disassembled. It is a side view of a hinge part, Comprising: It is a figure which shows another example about a pin detachment hole. In this figure, the coupled state is schematically shown with the hinge arm and the hinge base disassembled. It is a side view of a hinge part, Comprising: It is a figure which shows another example about a pin detachment hole. In this figure, the coupled state is schematically shown with the hinge arm and the hinge base disassembled. It is a longitudinal cross-sectional view of the hinge part provided with the 2nd coupling | bonding form. It is a side view of the hinge part provided with the 2nd coupling | bonding form. In this figure, the coupled state is schematically shown with the hinge arm and the hinge base disassembled. It is a longitudinal cross-sectional view of the hinge part provided with the 3rd coupling | bonding form. It is a side view of a hinge part provided with the 3rd combination form. In this figure, the coupled state is schematically shown with the hinge arm and the hinge base disassembled. It is a side view of the hinge arm which shows the example which abbreviate | omitted the pin detachment hole about the support hole of the hinge pin, and provided only the pin escape part. In this figure, the omitted pin detachment hole is indicated by a two-dot chain line. It is a side view of the hinge arm provided with the pin relief part of a different form.

Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a hood 10 is supported at the front portion of the vehicle 1. The hood 10 serves as a lid for opening and closing the engine room, and includes a front-opening support structure that is supported so as to be opened and closed up and down via a pair of left and right hinges 20 and 20 on the rear side. Yes. The front window 3 is located behind the hood 10.
The hood 10 is locked in the closed position by a hood lock device 4 provided at the front center of the engine room. If the hood lock device 4 is unlocked, the hood 10 can be opened by rotating the front side in the direction of upward displacement about the hinges 20 and 20 side (rear side). The present embodiment is a support structure for the hood 10 particularly for the vehicle body 2 and corresponds to both a case where a small impact F1 is applied to the front portion of the vehicle body 2 and a case where a large impact F2 is applied. It has the characteristics that it is a structure to obtain. In the present embodiment, a small impact F1 is assumed to be a light impact that is received when the vehicle collides with a pedestrian, for example, and a large impact F2 is assumed to be a relatively large impact that is received, for example, during a frontal collision of the vehicle.
Since the left and right hinge portions 20, 20 are configured symmetrically, the left side hinge portion 20 (the lower side in FIG. 1) will be described in the following description. As shown in FIG. 2, the hinge portion 20 includes a hinge base 21 attached to the vehicle body 2 side, a hinge arm 22 attached to the hood 10 side, and the hinge arm 22 rotatable relative to the hinge base 21. A hinge pin 23 is provided to be coupled to.
As shown in FIG. 4, the hinge pin 23 is inserted through both a circular support hole 21 a provided in the rear part of the hinge base 21 and a circular support hole 22 a provided in the rear part of the hinge arm 22. The hinge pins 23 are inserted into the support holes 21a and 22a so as to be freely rotatable with no backlash in the radial direction (first coupling form). A hinge arm 22 is coupled to the hinge base 21 via the hinge pin 23 so as to be rotatable up and down.
A pin release hole 22c is provided in the support hole 22a of the hinge arm 22 via a pin relief part 22b. By providing the support hole 22a in a state where the pin detachment hole 22c communicates with the pin relief part 22b via the pin escape part 22b, the support hole 22a is provided in a “daruma hole” shape.

The pin relief portion 22 b is set to a width dimension smaller than the diameter of the hinge pin 23. The width of the pin relief portion 22b is such that the impact applied to the front portion of the vehicle body 2 is a small impact F1 or a smaller impact or no impact is applied, so that the load applied to the hinge pin 23 is the reference load F0. In a state where it does not reach, the width is set to prevent the hinge pin 23 from entering or passing through, so that the hinge pin 23 is held in the support hole 22a. For this reason, when a small impact F1 is applied to the front portion of the vehicle body 2 during a normal opening / closing operation of the hood 10, the hinge arm 22 moves up and down around the hinge pin 23 held in the support hole 22a. Rotate. When a small impact F1 is applied, the hood 10 is flipped upward by rotating the hinge arm 22 around the hinge pin 23 held in the support hole 22a, thereby protecting the pedestrian.
On the other hand, the width dimension of the pin relief portion 22b is such that when the load applied to the hinge arm 22 due to the impact applied to the front portion of the vehicle body 2 reaches a predetermined reference load F0, the hinge pin 23 is The width dimension is set such that the hinge arm 22 moves relatively with respect to the hinge base 21 in the impact input direction. That is, when a large impact F2 is applied to the front portion of the vehicle body 2 and the load applied to the hinge arm 22 reaches the reference load F0 or more, the hinge pin 23 is moved to the pin relief portion 22b by the large impact F2. The width dimension is set such that it can be detached from the inside of the support hole 22a by being deformed in the direction of expanding both sides of the width direction. By passing through the pin relief portion 22b while being expanded by the large impact F2, the hinge pin 23 is detached from the support hole 22a and relatively moved into the pin release hole 22c, whereby the hinge arm 22 is moved along the two-dot chain line in FIG. Retreat in the impact input direction as shown by.
When the hinge arm 22 moves backward with respect to the hinge base 21, the engaging claw portion 22d (see FIG. 2) provided on the hinge arm 22 enters below the stopper portion 21d provided on the hinge base 21, thereby The rotation of the hinge arm 22 upward (in the opening direction) is restricted. When the upward rotation of the hinge arm 22 is restricted, the hood 10 is bounced upward and then buckled by a large reaction force without further retreating. In FIG. 3, reference numeral 10 (A) is attached to the hood 10 in the closed position, reference numeral 10 (B) is attached to the hood 10 that is flipped up, and reference numeral 10 (C) is attached to the buckled hood 10. Yes.
From the above, the reference load F0 is a radial load applied to the hinge pin 23 via the hinge arm 22 when an impact is applied to the front portion of the vehicle body 2, and the hinge pin 23 is It is set as a load that is necessary and sufficient to displace relatively into the pin detachment hole 22c via the pin relief portion 22b, and the hood 10 is mainly bounced up to protect the pedestrian and to buckle the hood. The value is set in advance in consideration of both the safety of the occupant by preventing the backward movement.

As described above, when the impact received on the front portion of the vehicle body 2 is a small impact F1, the hinge arm 22 of the hinge portion 20 is rotated and the rear side of the hood 10 is mainly flipped up to protect the pedestrian. Is planned. On the other hand, when the impact received on the front part of the vehicle body 2 is a large impact F2, the hinge arm 22 of the hinge part 20 moves backward with respect to the hinge base 21, thereby engaging claw part 22d on the hinge arm 22 side. Is engaged with the stopper portion 21b on the hinge base 21 side from below, and the rotation of the hinge arm 22 is restricted. For this reason, the hood 10 is restrained from retreating after the rear side is flipped up, and is buckled by a large reaction force generated as a result.
Thus, according to the illustrated support structure of the hood 10, it is possible to cope with both the case where the impact received by the front portion of the vehicle body 2 is the small impact F1 and the case where the impact is the large impact F2. In addition, when it receives a large impact F2, it is configured to restrict its rotation by using the retreating operation of the hinge arm 22, so that the conventional stopper members and configurations at a plurality of locations are complicated, resulting in a large cost increase. The hood 10 can be buckled and the large impact F2 can be reliably absorbed while regulating the backward movement of the hood 10 without adding a mechanism or a stopper mechanism to avoid jumping into the vehicle interior side.
Further, by appropriately setting the width dimension of the pin relief portion 22b provided in the support hole 22a of the hinge arm 22, when the impact received on the front portion of the vehicle body 2 is a small impact F1, the hinge arm 22 The rearward movement is restricted, and in the case of a large impact F2, the hinge arm 22 is retracted, thereby efficiently absorbing the impact applied to the vehicle body 2 regardless of the magnitude of the impact and ensuring the safety of the occupant. Or pedestrian protection.
In addition, since the pin relief portion 22b and the pin detachment hole 22c having an appropriate width dimension are provided continuously to the support hole 22a, both the small impact F1 and the large impact F2 can be handled. There is no complication of the conventional structure and a large cost increase.

Various modifications can be made to the embodiment described above. For example, the configuration in which the pin relief portion 22b and the pin release hole 22c are provided in the support hole 22a on the hinge arm 22 side is illustrated in FIGS. 4 and 5, but as shown in FIG. 6, the support hole 21a on the hinge base 21 side is provided. It is good also as a structure which provides the pin escape part 21b and the pin detachment hole 21c. In this case, the pin escape portion 21b and the pin detachment hole 21c may be provided on the right side (reverse side of the hinge arm) of the support hole 21a so that the hinge arm 22 and the hinge pin 23 are integrally retracted. Moreover, as shown in FIG. 7, it is good also as a structure which provides pin escape parts 21b and 22b and pin detachment holes 21c and 22c in both the hinge base 21 and the hinge arm 22. FIG.
Furthermore, the hinge part 20 provided with the 1st coupling | bonding form which inserted the hinge pin 23 so that relative rotation was possible with respect to the support holes 21a and 22a of both the hinge base 21 and the hinge arm 22 was illustrated in FIG.4 and FIG.5. 8 and 9, for example, a hinge pin 24 is fixedly provided on the hinge arm 22 side, and the hinge pin 24 is inserted into the support hole 21a of the hinge base 21 so as to be relatively rotatable. The same applies to the hinge portion provided. In this case, as shown in FIG. 9, the pin escape portion 21 b and the pin release hole 21 c may be provided in the support hole 21 a of the hinge base 21 so that the hinge arm 22 and the hinge pin 24 are retracted integrally.
On the contrary, as shown in FIGS. 10 and 11, a third coupling form is provided in which a hinge pin 25 is fixedly provided on the hinge base 21 side, and the hinge pin 25 is inserted into the support hole 22 a of the hinge arm 22 so as to be relatively rotatable. The same applies to the hinge portion provided. In this case, as shown in FIG. 11, a pin relief portion 22b and a pin detachment hole 22c are provided in the support hole 22a of the hinge arm 22 so that the hinge arm 22 is retracted with respect to the hinge base 21 and the hinge pin 25. do it.
In the embodiment described above, both the pin relief portion 22b (21b) and the pin release hole 22c (21c) are provided in the support hole 21a (22a) through which the hinge pin 23 (24, 25) is inserted. Although the configuration of the shape is illustrated, for example, as shown by a two-dot chain line in FIG. 12, the pin release hole 22c is omitted, and only the long groove hole-shaped pin relief portion 26 is provided in the support hole 22a to form a keyhole shape. It is good. Even in such a configuration, when the impact received at the front portion of the vehicle body 2 is a large impact F2, the hinge pin 23 is deformed in the direction of expanding the pin relief portion 26 and relatively enters the pin relief portion 26. As a result, the support hole 22a can be detached from the support hole 22a, and the hood 10 can be buckled by retreating the hinge arm 22 with respect to the hinge base 21 in the impact input direction. Such a configuration can be applied not only to the hinge arm 22 side but also to the hinge base 21 side. When provided on the hinge base 21 side, the long groove hole-shaped pin relief portion 26 may be provided on the rear side (backward side of the hinge arm) of the support hole 21a.
Further, the pin relief portion for restricting the relative displacement of the hinge pin 23 can be further changed. For example, as shown in FIG. 13, a long slot 27 is provided in the rear part of the hinge arm 22 along the impact input direction, and a regulation pin 28 is provided in the middle of the longitudinal direction of the slot 27 so as to be provided on the regulation pin 28. On the other hand, the hinge pin 23 may be inserted into the support hole 27a on the rear side (right side in FIG. 13). Even in such a configuration, when the load applied to the hinge pin 23 via the hinge arm 22 due to the impact (F1 / F2) received on the front portion of the vehicle body 2 is smaller than the reference load J0 (small impact F1), the restriction pin 28, the relative displacement of the hinge pin 23 is regulated and held in the support hole 27a. As a result, the hinge arm 10 can be rotated and the rear part of the hood 10 can be flipped up, while the load applied to the hinge pin 23 is the reference. When the load is greater than or equal to J0 (large impact F2), the hinge pin 23 is relatively displaced into the pin release hole 27b on the front side of the long groove hole 27 while deforming the restriction pin 28, thereby causing the hinge arm 10 to receive an impact input. Can be retracted in the direction. This configuration can be applied not only to the hinge arm 22 side but also to the hinge base 21 side. When applied to the hinge base 21 side, the hinge pin 23 may be inserted through the long groove hole 27 with the front side of the restriction pin 28 as a support hole and the rear side of the restriction pin 28 as a pin relief hole.

F1 ... small impact F2 ... large impact 1 ... vehicle 2 ... vehicle body 3 ... front window 4 ... hood lock device 10 ... hood 10 (A) ... hood (closed position)
10 (B) ... Hood (bounce-up state)
10 (C) ... Hood (buckled state)
20 ... Hinge part 21 ... Hinge base 21a ... Support hole, 21b ... Pin relief part, 21c ... Pin release hole, 21d ... Stopper part 22 ... Hinge arm 22a ... Support hole, 22b ... Pin relief part, 22c ... Pin release hole, 22d ... engaging claw parts 23, 24, 25 ... hinge pin 26 ... pin relief part 28 ... regulating pin (pin relief part)

Claims (4)

It is a structure of a front opening type hood supported by a front part of a vehicle body via a hinge part so that it can be opened and closed up and down,
The hinge portion includes a configuration in which the hood side hinge arm is rotatably coupled to a vehicle body side hinge base via a hinge pin.
A reference load is set for a load applied to the hinge pin via the hinge arm due to an impact received by a front portion of the vehicle body,
When receiving an impact smaller than the reference load, the hinge arm rotates and the rear side of the hood is flipped up,
A hood structure configured such that when a large impact exceeding the reference load is received, the hinge arm is retracted in the direction of impact input with respect to the hinge base to restrict rotation of the hinge arm. It is a structure of a front opening type hood supported by a front part of a vehicle body via a hinge part so that it can be opened and closed up and down,
The hinge portion includes a configuration in which the hood side hinge arm is rotatably coupled to a vehicle body side hinge base via a hinge pin.
A pin relief portion is provided in a circular support hole through which the hinge pin is rotatably inserted for one or both of the hinge base and the hinge arm,
The pin relief portion allows the hinge pin to enter when a load applied to the hinge pin via the hinge arm due to an impact received by the front portion of the vehicle body is equal to or greater than a predetermined reference load. A hood structure in which a hinge arm is configured to retreat in an impact input direction with respect to the hinge base. 3. The hood structure according to claim 2, wherein when the impact received by the front portion of the vehicle body is smaller than the reference load, the pin relief portion restricts the entry of the hinge pin to restrict the hinge pin. While the hinge arm can be rotated while being held in the support hole, when the impact received by the front portion of the vehicle body is a large impact that is greater than or equal to the reference load, the entry of the hinge pin is permitted. A hood structure in which a hinge pin is relatively removed from the inside of the support hole to retract the hinge arm. 4. The hood structure according to claim 1 or 3, wherein when the hinge arm moves backward with respect to the hinge base due to the large impact, the rotation of the hinge arm is restricted by engaging with a stopper portion provided on the hinge base. A hood structure with a structure.

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