Pop-up hood device

Abstract

To provide a more rational pop-up hood device.SOLUTION: The pop-up hood device 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 coupled to the first hinge member via the first rotation shaft and coupled to the second hinge member via the second rotation shaft, a convex portion fixed to the third hinge member and extending in a vehicle width direction, a lift device that moves the second hinge member upward and lifts the hood when the vehicle collides, and a clip that is provided below the convex portion, accommodates the convex portion when the convex portion moves downward, and sandwiches the convex portion when the convex portion moves upward to absorb an impact when the convex portion moves.SELECTED DRAWING: Figure 1

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] The pop-up hood device according to the present disclosure is a pop-up hood device that is mounted on a vehicle and lifts the rear end of the hood in the event of a vehicle collision. The pop-up hood device 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 in the event of a vehicle collision; and a clip that is mounted below the protrusion and accommodates the protrusion when it moves downward and clamps the protrusion when it moves upward, absorbing impact when the protrusion moves. [Effects of the Invention]

[0008] With this pop-up hood device, the clip 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] 1 illustrates a clip according to one embodiment of the present disclosure. [Figure 6] 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 7]10A and 10B are diagrams illustrating changes in the position of a protrusion relative to a clip of a pop-up hood device 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 clip 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 pedestrian, bicycle, or other object. 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] Clip 12 is provided below protrusion 8, and is a member that accommodates protrusion 8 when protrusion 8 moves downward, and clamps protrusion 8 when protrusion 8 moves upward, absorbing the impact when protrusion 8 moves. Clip 12 is fixed to second hinge member 4.

[0023] The clip 12 shown in FIG. 5 has an opening 20, a pair of side portions 22, and a connecting portion 24. The protrusion 8 passes through the opening 20. The pair of side portions 22 are formed on the left and right sides of the opening 20. In this embodiment, the pair of side portions 22 includes a front side portion 22a and a rear side portion 22b. The side portions 22a and 22b are symmetrical with respect to a center line S1 (see imaginary line) in the front-to-rear direction. In this embodiment, the clip 12 is made of resin or metal.

[0024] The width of the side portion 22 increases toward the tip end, which is opposite the connecting portion 24. In this embodiment, the front side portion 22a increases in width in the front-to-rear direction toward the tip end 26a of the side portion 22a. The rear side portion 22b increases in width in the front-to-rear direction toward the tip end 26b of the side portion 22b.

[0025] The side portion 22 includes a plurality of recesses 28. The recesses 28 are provided on the opposite side from the opening 20 and are recessed in a direction intersecting the direction in which the protrusion 8 passes. The recesses 28 include a first recess 28a, a second recess 28b, and a third recess 28c. The depth h2 of the second recess 28b is deeper than the depth h1 of the first recess 28a. The depth h3 of the third recess 28c is deeper than the depth h2 of the second recess 28b. The second recess 28b is located closer to the connecting portion 24 than the first recess 28a. The third recess 28c is located closer to the connecting portion 24 than the second recess 28b. That is, in this embodiment, the first recess 28a, the second recess 28b, and the third recess 28c are arranged in this order between the tip of the side portion 22 and the connecting portion 24. Furthermore, in this embodiment, recesses 28 are provided in both the front side portion 22a and the rear side portion 22b.

[0026] The vicinity of the tip 26a of the front side portion 22a and the vicinity of the tip 26b of the rear side portion 22b bend toward the center line S. The surface 30 on the opening 20 side of the side portion 22 forms a larger angle with the intrusion direction of the protrusion 8 as it approaches the tip. In this embodiment, the intrusion direction of the protrusion 8 is the direction in which the center line S extends. The angle θ1 is larger than the angle θ2. The angle θ1 is the angle between the first surface 30a located at the tip end and the intrusion direction of the protrusion 8. The angle θ2 is the angle between the second surface 30b located on the connection portion 24 side of the first surface 30a and the intrusion direction of the protrusion 8.

[0027] The connecting portion 24 connects the pair of side portions 22. In this embodiment, it connects the front side portion 22a and the rear side portion 22b. The connecting portion 24 bends downward when the protrusion 8 comes into contact with the connecting portion 24. By bending, the connecting portion 24 draws the pair of side portions 22 together, thereby narrowing the distance between the pair of side portions 22.

[0028] Next, the state of the clip 12 when the vehicle C collides will be described with reference to FIGS.

[0029] 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. 7(a), the protrusion 8 moves downward and passes through the opening 20 of the clip 12.

[0030] 7(b), the clip 12 that has passed comes into contact with the connecting portion 24, causing the connecting portion 24 to bend. By bending, the connecting portion 24 absorbs the impact when the hood C1 rises and also functions as a stopper when the rear end of the hood C1 is raised. In other words, the connecting portion 24 absorbs the energy of the second hinge member 4 rising by the energy of the protrusion 8 bending the connecting portion 24.

[0031] When the connecting portion 24 is bent, the connecting portion 24 pulls the front side portion 22a and the rear side portion 22b together, and the opening 20 is closed.

[0032] As shown in FIG. 6, when an object X 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. 7(c), the protrusion 8 separates from the connection portion 24 and rises.

[0033] At this time, as shown in Figures 7(d) and 7(e), the protrusions 8 deform the side portions 22 back and forth and rise while pushing open the side portions 22. In this way, the energy with which the protrusions 8 deform the side portions 22 can absorb the energy with which the colliding object X (see Figure 6) presses against the hood C1.

[0034] As described above, the recesses 28 are deeper at the bottom of the side portions 22, making them more easily deformable at the bottom. Therefore, as the protrusions 8 rise, the energy required to push open the side portions 22 increases. Furthermore, the side portions 22 are wider at the top. This further increases the energy required to push open the side portions 22 as the protrusions 8 rise. Furthermore, the angle of the side portions 22 relative to the direction of entry of the protrusions 8 increases toward the tip. This further increases the energy required to push open the side portions 22 as the protrusions 8 rise. In this way, the higher the protrusions 8 rise, the greater the energy required to deform the side portions 22. This makes it easier for the hood C1 to move downwards in the initial stage after the colliding object X (see FIG. 6) collides with the hood C1. As a result, the pop-up hood device 1 can mitigate the instantaneous impact on the colliding object X. On the other hand, the more energy the colliding object X uses to push the hood C1, the more the protrusions 8 move upward. Therefore, the more energy the colliding object X presses against the hood C1, the more energy the protrusions 8 use to push open the side portions 22. As a result, even if the energy with which the colliding object X presses against the hood C1 increases after the colliding object X collides with the hood C1, the clips 12 deform to absorb the energy. As a result, the impact on the colliding object X after the colliding object X collides with the hood C1 can be alleviated.

[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 clip 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 combined as needed.

[0037] In the above embodiment, an example in which the protrusion 8 moves in the vertical direction has been described, 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 clip 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 part, 10: Lifting device, 12: Clip 20: opening, 22: side, 22a: side, 22b: side 24: Connection 26a: Tip, 26b: Tip 28: recess, 28a: first recess, 28b: second recess, 30: surface C: Vehicle, C1: Hood θ1: Angle, θ2: Angle

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 clip that is provided below the convex portion, that accommodates the convex portion when the convex portion moves downward, and that sandwiches the convex portion when the convex portion moves upward, thereby absorbing impact when the convex portion moves; Equipped with Pop-up hood device.

2. The clip is an opening through which the protrusion passes, a pair of side portions formed on the left and right of the opening, and a connecting portion connecting the pair of side portions; The protrusion contacts the connection portion, thereby narrowing the distance between the pair of side portions. The pop-up hood device according to claim 1 .

3. The side portion has a width that increases toward the tip side, which is opposite to the connection portion. The pop-up hood device according to claim 2.

4. the surface of the side portion on the opening side has an angle that is larger with respect to the direction in which the protrusion enters, the angle being closer to the tip end. The pop-up hood device according to claim 2.

5. The side portion includes a recess provided on the opposite side to the opening and recessed in a direction intersecting a direction in which the protrusion passes. The pop-up hood device according to any one of claims 2 to 4.

6. The recess includes a first recess and a second recess that is deeper than the first recess, the second recess is located closer to the connection portion than the first recess; The pop-up hood device according to claim 5.

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