Pop-up hood device

Abstract

To provide a more rational pop-up hood device.SOLUTION: A first hinge member having a first rotation axis and fixed to the vehicle; and a second hinge member having a second rotation axis and fixed to the hood. A third hinge member connected to the second hinge member via the second rotation shaft, a protrusion fixed to the third hinge member and extending in the vehicle width direction, a lift device configured to move the second hinge member upward and lift the hood when the vehicle collides, and a damper mechanism configured to absorb an impact when the third hinge member moves, the damper mechanism includes a base material, a through hole provided in the base material and configured to guide the convex part when the third hinge member moves, a first damper configured to absorb an impact when the convex part moves downward, and a second damper configured to absorb an impact when the convex part moves upward.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a pop-up hood device. [Background technology]

[0002] Pop-up hood devices that are installed in vehicles are known (see, for example, Patent Document 1). The pop-up hood device of Patent Document 1 is capable of lifting the rear end of the hood when the vehicle collides with a pedestrian or other object. By lifting the rear end of the hood in this way, the pop-up hood device receives the colliding object with the hood and reduces the impact of the colliding object. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-029721 Summary of the Invention [Problem to be solved by the invention]

[0004] The pop-up hood device in Patent Document 1 has a hinge structure for attaching a hood. The hinge structure in Patent Document 1 has an arm member. The arm member includes an arm attachment portion, a weak portion, and a connection release portion. The hinge structure in Patent Document 1 absorbs energy when an object strikes the hood by bending the weak portion.

[0005] However, the hinge structure of Patent Document 1 requires the provision of a weak part in the arm member. When providing such a weak part, it may be necessary to reinforce the arm member to prevent a decrease in strength of the arm member.

[0006] An object of the present disclosure is to provide a more streamlined pop-up hood device. [Means for solving the problem]

[0007] A pop-up hood device according to the present disclosure is provided on a vehicle and lifts the rear end of the hood when the vehicle collides, and includes: a first hinge member having a first rotation shaft and fixed to the vehicle; a second hinge member having a second rotation shaft and fixed to the hood; a third hinge member connected to the first hinge member via the first rotation shaft and connected to the second hinge member via the second rotation shaft; a protrusion fixed to the third hinge member and extending in the vehicle width direction; a lift device that moves the second hinge member upward and lifts the hood when the vehicle collides; and a damper mechanism that absorbs impact when the third hinge member moves, the damper mechanism comprising a base material and a base material. the first damper is a plate-like member fixed to the base material and is positioned below the convex portion; the second damper is a plate-like member fixed to the base material and is positioned so as to overlap the convex portion in the vehicle width direction before the third hinge member moves; and when the convex portion moves downward, the second damper disengages from the convex portion and is positioned above the convex portion. [Effects of the Invention]

[0008] With this pop-up hood device, the damper mechanism using the plate-shaped member can absorb both the impact when the hood rises and the impact on the hood from a colliding object, providing a more streamlined pop-up hood device. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a side view showing a pop-up hood device according to one embodiment of the present disclosure. [Figure 2] FIG. 1 is a top view illustrating a pop-up hood device according to one embodiment of the present disclosure. [Figure 3] FIG. 2 is a side view showing the hood of the pop-up hood device according to the embodiment of the present disclosure in an open state. [Figure 4] FIG. 1 is a side view showing a pop-up hood device according to an embodiment of the present disclosure in a pop-up state. [Figure 5] FIG. 2 is a side view illustrating a damper mechanism according to one embodiment of the present disclosure. [Figure 6] FIG. 2 is a top view illustrating a damper mechanism according to one embodiment of the present disclosure. [Figure 7] FIG. 2 is a side view showing a state in which the pop-up hood device according to the embodiment of the present disclosure is absorbing an impact. [Figure 8] 10A and 10B are diagrams illustrating changes in the position of a protrusion in a pop-up hood device and an operating state of a damper mechanism according to an embodiment of the present disclosure. [Figure 9] 5A and 5B are diagrams illustrating a deformed state of a second damper according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present disclosure will be described below with reference to the drawings. In the drawings, the front side of the vehicle is designated as FS, the rear side as BS, the right side as RS, the left side as LS, the upper side as US, and the lower side as DS. In this embodiment, the left and right sides correspond to the left and right sides when an occupant in the vehicle is facing forward in the fore-and-aft direction of the vehicle.

[0011] As shown in FIGS. 1 and 2, the pop-up hood device 1 includes a first hinge member 2, a second hinge member 4, a third hinge member 6, a protrusion 8, a lift device 10, and a damper mechanism 12.

[0012] The pop-up hood device 1 is mounted on a vehicle C. The pop-up hood device 1 is a device for lifting the rear end of the hood C1 of the vehicle C when the vehicle collides with a striking object such as a pedestrian or a bicycle. A pair of pop-up hood devices 1 are arranged side by side in the vehicle width direction, one on the left and one on the right. The pair of left and right pop-up hood devices 1 are shaped symmetrically with respect to the center line of the vehicle C in the vehicle width direction. For this reason, in the following specification, only the left pop-up hood device 1 will be described, and a description of the right pop-up hood device 1 will be omitted.

[0013] The first hinge member 2 has a first rotation shaft 2a. The first hinge member 2 is fixed to the vehicle C. In this embodiment, the first hinge member 2 is a sheet metal member extending in the front-rear direction. The first rotation shaft 2a is provided near the rear end of the first hinge member 2.

[0014] The second hinge member 4 has a second rotating shaft 4a and a connecting pin 4b. The second hinge member 4 is fixed to the vehicle C. In this embodiment, the second hinge member 4 is a sheet metal member extending in the front-rear direction. The second rotating shaft 4a is provided near the front end of the second hinge member 4. The connecting pin 4b is provided at the rear end of the second hinge member 4. The connecting pin 4b extends in the vehicle width direction toward the third hinge member 6.

[0015] The third hinge member 6 is a member that connects the first hinge member 2 and the second hinge member 4. The third hinge member 6 is connected to the first hinge member 2 via a first rotation shaft 2a, and is connected to the second hinge member 4 via a second rotation shaft 4a.

[0016] In this embodiment, the third hinge member 6 has a recess 6a. The connecting pin 4b of the third hinge member 6 is fitted into the recess 6a. In this way, the third hinge member 6 is fixed to the second hinge member 4.

[0017] 3, the third hinge member 6 rotates together with the second hinge member 4 about the first rotation axis 2a while being fixed to the second hinge member 4. In this manner, the front sides of the second hinge member 4 and the third hinge member 6 rotate upward relative to the first hinge member 2, opening the front side of the hood C1.

[0018] 4, when the vehicle C collides, the third hinge member 6 is released from its connection to the second hinge member 4. In this embodiment, the coupling pin 4b of the second hinge member 4 is disengaged from the recess 6a, thereby releasing the coupling between the second hinge member 4 and the third hinge member 6. The rear side of the third hinge member 6 rotates downward around the second rotation shaft 4a of the second hinge member 4, lifting the rear side of the hood C1 upward.

[0019] 2, the protrusion 8 is fixed to the third hinge member 6 and extends in the vehicle width direction. In this embodiment, the protrusion 8 is a cylindrical metal member that extends from the third hinge member 6 toward the left side.

[0020] As shown in Figure 4, when the vehicle C collides, the lift device 10 moves the rear end of the second hinge member 4 upward. As a result, the lift device 10 lifts the rear end of the hood C1 upward. In this embodiment, the lift device 10 has a rod 10a. When the lift device 10 receives a collision signal from a collision sensor (not shown) of the vehicle C, it causes the rod 10a to protrude upward.

[0021] When the lift device 10 lifts the rear end of the second hinge member 4, the front end of the third hinge member 6 is lifted upward around the first rotation shaft 2a. Meanwhile, the rear end of the third hinge member 6 rotates downward around the second rotation shaft 4a relative to the second hinge member 4. This causes the protrusion 8 to lower relative to the second hinge member 4.

[0022] The damper mechanism 12 absorbs impacts when the third hinge member 6 moves. As shown in Figures 5 and 6, the damper mechanism 12 has a base material 20, a through-hole 22, a first damper 24, and a second damper 26.

[0023] The base material 20 is fixed to the second hinge member 4. In this embodiment, the base material 20 is a sheet metal member.

[0024] The through hole 22 is provided to penetrate the base material 20 in the vehicle width direction. The through hole 22 guides the protrusion 8 when the third hinge member 6 moves. In this embodiment, the through hole 22 is formed so that the center line of the through hole 22 is an arc with a radius extending from the second rotation shaft 4a to the center of the protrusion 8.

[0025] The first damper 24 absorbs the impact when the convex portion 8 moves downward. The second damper 26 absorbs the impact when the convex portion 8 moves upward. The first damper 24 is a plate-like member fixed to the base material 20 by a cylindrical fixing portion 22a, and is disposed below the convex portion 8. In this embodiment, the first damper 24 is a sheet metal member (an example of a plate-like member), and is deformed by being pressed when the convex portion 8 moves downward. The first damper 24 absorbs the energy generated when the hood C1 rises due to this deformation.

[0026] The second damper 26 is a sheet metal member (an example of a plate-like member) fixed to the base material 20 via the fixing portion 22a, and is disposed in a state overlapping the protrusion 8 in the vehicle width direction before the third hinge member 6 moves. More specifically, the second damper 26 extends from a position more inward in the vehicle width direction than the tip of the protrusion 8 in the vehicle width direction (the right side in this embodiment) toward the protrusion 8. When the second damper 26 rides up on the protrusion 8 in the vehicle width direction, it is maintained in a deformed state bent in the vehicle width direction. When the protrusion 8 moves downward, the second damper 26 disengages from the protrusion 8 and moves above the protrusion 8 (see FIGS. 8(a) and 8(b)). A more detailed description of the deformed state of the second damper 26 will be given later.

[0027] The second damper 26 is thinner on the side opposite the fixed portion 22a (hereinafter referred to as the tip side in the specification) than on the side of the fixed portion 22a where the second damper 26 is fixed to the base material 20. In this embodiment, the vertical width of the second damper 26 becomes thinner toward the tip side. This makes the second damper 26 more likely to deform toward the tip side.

[0028] The second damper 26 includes a plurality of recesses 28 that are open on the top. As shown in FIG. 5, in this embodiment, the second damper 26 includes, in order from the tip side, a first recess 28a, a second recess 28b, and a third recess 28c. A first distance h1, which is the distance from the open end to the bottom of the first recess 28a, is longer than a second distance h2, which is the distance from the open end to the bottom of the second recess 28b. The second distance h2, which is the distance from the open end to the bottom of the second recess 28b, is longer than a third distance h3, which is the distance from the open end to the bottom of the third recess 28c. In other words, the depths of the plurality of recesses 28 increase from the tip side. This makes the tip side of the second damper 26 more susceptible to deformation.

[0029] Next, the state of the damper mechanism 12 when the vehicle C collides will be described with reference to FIGS.

[0030] As described above, when the vehicle C collides, the rear end of the hood C1 is lifted as shown in Fig. 4. At this time, the third hinge member 6 moves downward relative to the second hinge member 4, and the protrusion 8 moves downward as shown in Fig. 8(a) to Fig. 8(b).

[0031] 8(a) and 8(b), at this time, the second damper 26 moves downward from the position where it overlaps with the protrusion 8 in the vehicle width direction. By disengaging from the protrusion 8, the second damper 26 changes from a deformed state in which it rides on the protrusion 8 in the vehicle width direction to a non-deformed state in which it extends in the front-to-rear direction.

[0032] The protrusion 8 abuts against the first damper 24 located below, pressing the first damper 24 downward and deforming the first damper 24. As a result, the energy required for deformation of the first damper 24 absorbs the energy of the second hinge member 4 when the hood C1 rises. As a result, the first damper 24 absorbs the impact when the hood C1 rises.

[0033] As shown in FIG. 7, when an object X1 collides with the top of the hood C1, the hood C1 receives an excessive weight on its lower side. At this time, the rear end of the hood C1 lowers, causing the second hinge member 4 to move downward. When the second hinge member 4 moves downward, the third hinge member 6 rotates about the first rotation axis 2a, causing the front side to lower. This causes the third hinge member 6 to rise relative to the second hinge member 4. As a result, as shown in FIG. 8(c), the protrusion 8 separates from the first damper 24 and rises.

[0034] As shown in FIG. 9, when the protrusion 8 rises, it pushes the second damper 26 from below. The second damper 26 is deformed by the protrusion 8. The second damper 26 is more easily deformed toward the tip, so it is more easily deformed in the initial stage of contact with the protrusion 8. As the protrusion 8 rises, the energy that deforms the second damper 26 increases. This makes it easier for the hood C1 to move downward in the initial stage after the colliding object X (see FIG. 7) collides with the hood C1, while the greater the energy with which the colliding object X pushes the hood C1, the more the protrusion 8 rises and the more energy the second damper 26 absorbs. As a result, the impact on the colliding object X can be mitigated.

[0035] As described above, according to the present disclosure, both the impact (energy) when the hood C1 rises and the impact (energy) that the colliding object X gives to the hood can be absorbed by the damper mechanism 12. This makes it possible to provide a more rational pop-up hood device.

[0036] <Other embodiments> Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and various modifications are possible within the scope of the gist of the invention. In particular, the multiple modifications described in this specification can be arbitrarily combined as necessary.

[0037] In the above embodiment, an example has been described in which the protrusion 8 moves in the vertical direction, but the present disclosure is not limited to this. The movement direction of the protrusion 8 does not necessarily have to be the vertical direction. The protrusion 8 may be moved in a direction other than the vertical direction depending on the attachment angle of the first hinge member 2 to the vehicle C and the attachment angle of the second hinge member 4 to the hood C1. In this case, the damper mechanism 12 may be attached to the second hinge member 4 in accordance with the movement direction of the protrusion 8.

[0038] In the above embodiment, an example has been described in which the lift device 10 is used to lift the second hinge member 4, but the present disclosure is not limited to this. The lift device 10 may be, for example, a device that lifts the rear end of the hood C1. [Explanation of symbols]

[0039] 1: Pop-up hood device 2: first hinge member, 2a: first rotation axis 4: second hinge member, 4a: second rotation axis 6: third hinge member, 6a: recess 8: Convex portion, 10: Lift device, 12: Damper mechanism 20: Base material, 22: Through hole 24: First damper, 26: Second damper, 28: Recess h1: 1st distance, h2: 2nd distance, h3: 3rd distance C: Vehicle, C1: Hood

Claims

1. A pop-up hood device that is provided on a vehicle and that lifts the rear end of the hood when the vehicle collides, a first hinge member having a first rotation axis and fixed to the vehicle; a second hinge member having a second rotation axis and fixed to the hood; a third hinge member connected to the first hinge member via the first rotation shaft and connected to the second hinge member via the second rotation shaft; a protrusion fixed to the third hinge member and extending in the vehicle width direction; a lift device that moves the second hinge member upward and lifts the hood when the vehicle collides; a damper mechanism that absorbs impact when the third hinge member moves; Equipped with A substrate; a through hole provided in the base material, which guides the protrusion when the third hinge member moves; a first damper that absorbs an impact when the convex portion moves downward; a second damper that absorbs an impact when the convex portion moves upward; and the first damper is a plate-like member fixed to the base material and disposed below the protrusion, the second damper is a plate-like member fixed to the base material, and is disposed in a state where it overlaps with the convex portion in the vehicle width direction before the third hinge member moves, and when the convex portion moves downward, it disengages from the convex portion and is positioned above the convex portion. Pop-up hood device.

2. the second damper is thinner on the side opposite to the fixed portion side than on the fixed portion side where the second damper is fixed to the base material; The pop-up hood device according to claim 1 .

3. The second damper includes a recess that is open at the top. The pop-up hood device according to claim 1 or 2.

4. The recess includes a first recess and a second recess located closer to a fixed portion, to which the second damper is fixed, than the first recess. The pop-up hood device according to claim 3.

5. a first distance from an open end to a bottom of the first recess is longer than a second distance from an open end to a bottom of the second recess; The pop-up hood device according to claim 4.

Images