JP2020192820A - Shock absorption mechanism - Google Patents

Abstract

To provide a shock absorption mechanism which can perform impact absorption favorably.SOLUTION: A shock absorption mechanism 2 is configured so as to reduce buffer load applied on a vehicle and is provided between a bumper reinforcement 11 applying the buffer load and a side member 9 to which the buffer load is transmitted from the bumper reinforcement 11. The shock absorption mechanism 2 includes a columnar impact absorption material 1 made of wood and a bolt 3. A side face of the impact absorption material 1 is coated and its rear end part is inserted into an internal space of a tubular portion of the side member 9. The bolt 3 is connected to the side member 9 and is disposed so as to traverse the internal space of the side member 9 behind the impact absorption material 1. A notch 7 in a direction perpendicularly intersecting with a member axial direction of the impact absorption material 1 is provided on a coating 1a of a face perpendicularly intersecting with a traverse direction of the bolt 3 of a side face of the impact absorption material 1.SELECTED DRAWING: Figure 2

Description

The present invention relates to a shock absorbing mechanism that absorbs a shock applied to a vehicle.

Patent Documents 1 and 2 describe techniques relating to an impact absorbing mechanism configured to receive an impact load at the time of a vehicle collision and absorb the impact.

According to Patent Documents 1 and 2, when the bumper shear is pushed toward the side member during a vehicle front collision, the wood provided between the bumper shear and the side member is pushed by a connecting material such as a bolt to be compressed. A shock absorbing mechanism in which shock is absorbed by shearing is described.

International Publication No. 2014/077314 JP-A-2017-7598

As described in Patent Document 1, the side surface of the above-mentioned wood may be coated in a tubular shape, but as a result of diligent examination by the present inventor, such a coating is compressed by the connecting material at the time of collision. It has been found that if the irregularly buckled coating penetrates deeply between the connecting material and the wood and becomes a mass, the compression of the wood is not as expected and the intended shock absorption effect may not be obtained.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a shock absorbing mechanism capable of suitably performing shock absorption.

The present invention for achieving the above-mentioned object is a shock absorbing mechanism for reducing a collision load applied to a vehicle, and is a load receiving member that receives a collision load and a subject to which the collision load is transmitted from the load receiving member. A wooden columnar shock absorbing material provided between the transmission members and having one end in the axial direction of the member inserted into the internal space of the load receiving member and one of the members to be transmitted, and one of the above. A first connecting member connected to the one member so as to cross the internal space of the member is provided, and the first connecting member is attached to the end surface of the one end portion of the shock absorbing material at the time of collision. A part of the shock absorbing material is pressed so that the side surface of the shock absorbing material is covered, and the coating of the surface of the side surface orthogonal to the transverse direction of the first connecting material is in a direction orthogonal to the member axial direction of the shock absorbing material. It is a shock absorbing mechanism characterized in that a first notch is provided.

In the present invention, by providing a notch in the direction orthogonal to the member axis of the shock absorbing material on the coating of the side surface of the shock absorbing material that is orthogonal to the transverse direction of the connecting material, the coating compressed by the connecting material at the time of collision is not formed. The coating can be buckled in the desired buckling state, avoiding buckling according to the rules. As a result, the coating can be folded shallowly to minimize the intrusion of the coating mass between the shock absorbing material and the connecting material, and it becomes possible to realize the intended shock absorption.

It is desirable that the first notch is provided at a position where it overlaps with the first connecting member when viewed from the member axial direction of the shock absorbing material.
The position of the notch is set in consideration of the position where the compression of the coating occurs, but since the compression of the coating often occurs at the position corresponding to the connecting material, it is recommended to provide the notch at the position where the notch overlaps the connecting material as described above. Suitable.

It is desirable that the coating of the surface of the side surface orthogonal to the transverse direction of the first connecting member is provided with a second notch in the member axial direction of the shock absorbing material.
At the time of a collision, a portion of the shock absorbing material that is not pressed by the connecting material may enter the above-mentioned internal space, and at this time, the coating may be pulled by the portion and hinder the realization of a desired buckling state by cutting. In such a case, it is desirable to provide the coating with another notch in the member axial direction of the shock absorber to break the coating at the position of the other notch at an early stage to prevent the coating from being pulled.

For example, the first connecting member has a flat surface portion or a concave surface portion facing the other member of the load receiving member and the transmitted member, and the second connecting member is at a position corresponding to both sides of the flat surface portion or the concave surface portion. The first notch is provided between the second notches.
In this case, a large collision load can be stably received by the flat surface portion or the concave surface portion of the connecting material, and the impact absorption effect is enhanced. Further, the coating of the shock absorbing material can be broken at an early stage at the position of the notch in the member axis direction on both sides of the flat surface portion or the concave surface portion, and the coating can be brought into a desired buckling state by the notch in the member axis orthogonal direction provided between them. .. At this time, the portion where the coating buckles due to the connecting material is limited to the position corresponding to the connecting material, and the influence on the compression of the wood can be reduced.

It is also desirable that the shape of the first notch in the longitudinal direction is wavy. It is also desirable that the cross-sectional shape of the first cut in the depth direction is any of a triangle, a rectangle, and a semicircle.
The shape of the notch in the direction orthogonal to the member axis in the longitudinal direction and the cross-sectional shape in the depth direction are selected so that the coating can be buckled to a desired state. For example, in the case where the coating thickness is not uniform, it is possible to robustly achieve the desired buckling state against such variations in the coating thickness by making the shape of the notch in the longitudinal direction wavy. .. Further, the buckling characteristics differ depending on the material of the coating, and the cross-sectional shape in the depth direction of the cut can be preferably triangular, rectangular, semicircular or the like depending on the buckling characteristics.

The other end of the shock absorbing material in the member axial direction is inserted into the internal space of the other member of the load receiving member and the transmitted member, and the internal space of the other member is connected to the first connection. A second connecting member connected to the other member so as to cross in the same crossing direction as the crossing direction of the material is further provided, and the second connecting material is the other end portion of the shock absorbing material at the time of collision. The first and second connecting members are arranged at different positions when viewed from the member axial direction of the shock absorbing material, and the first notch of the shock absorbing material is formed by pressing a part of the end face of the shock absorbing material. It is also desirable that the components are provided on the one end side and the other end side.
In this case, shock absorption by shearing of the shock absorbing material becomes possible, but in the case of performing shock absorption by shearing, the coating is provided at both ends of the shock absorbing material by providing a notch in the direction orthogonal to the member axis as described above. It is possible to buckle in the desired buckling state.

According to the present invention, it is possible to provide a shock absorbing mechanism capable of suitably performing shock absorption.

The schematic which shows the arrangement of the shock absorption mechanism 2. The figure which shows the shock absorption mechanism 2. The figure which shows the shock absorption mechanism 2 in the state which the collision load is applied. The figure which shows the compression part 15. The figure which shows the relationship between the displacement of a bumper reinforce 11 and the load which a shock absorbing mechanism 2 receives. Example of flat surface portion 5. Example of concave surface portion 6. The figure which shows the notch 7a, 7b. The figure which shows the notch 7c, 7d, 7e, 7f. The figure which shows the shock absorption mechanism 2a. The figure which shows the shock absorption mechanism 2b. The figure which shows the shock absorption mechanism 2c. The figure which shows the shock absorption mechanism 2c in the state which the collision load is applied.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic view showing the arrangement of the shock absorbing mechanism 2 according to the embodiment of the present invention. The shock absorbing mechanism 2 is provided on the vehicle 10 and is for absorbing the shock applied to the vehicle 10 at the time of a collision to reduce the collision load. The shock absorbing mechanism 2 is arranged between the bumper reinforce 11 of the front bumper (not shown) and the side member 9 of the vehicle 10.

The left and right sides of FIG. 1 correspond to the front-rear direction of the vehicle, and the top and bottom of FIG. 1 correspond to the width direction of the vehicle. Hereinafter, the term "front" refers to the front side of the vehicle 10 and corresponds to the left side of FIG. “Rear” refers to the rear side of the vehicle 10 and corresponds to the right side of FIG.

The bumper reinforcement 11 is a load receiving member that receives a collision load at the time of a frontal collision of the vehicle, and is arranged so as to extend in the vehicle width direction at the front portion of the vehicle 10.

The side member 9 is a transmitted member to which the collision load received by the bumper reinforce 11 is transmitted. The side members 9 are arranged on the left and right in the vehicle width direction, and a shock absorbing mechanism 2 is provided between each side member 9 and the bumper reinforcement 11.

FIG. 2 is a diagram showing a shock absorbing mechanism 2. FIG. 2A is a diagram showing a vertical cross section of the shock absorbing mechanism 2, and FIGS. 2B and 2C are views showing a horizontal cross section of the shock absorbing mechanism 2. 2 (a) is a cross section along the line bb of FIG. 2 (c), and FIGS. 2 (b) and 2 (c) are along the lines a1-a1 and a2-a2 of FIG. 2 (a), respectively. It is a cross section.

As shown in FIG. 2, the shock absorbing mechanism 2 has a shock absorbing material 1, a bolt 3, and the like.

The shock absorbing material 1 is a wooden columnar member, and the member axial direction is the vehicle front-rear direction (corresponding to the left-right directions of FIGS. 2A to 2C), and both ends in the member axial direction are on the bumper reinforce 11 side. , Arranged so as to be on the side member 9 side. In the present embodiment, the axial direction of the member corresponds to the axial direction of the annual ring of wood (the fiber direction of wood), but the present invention is not limited to this.

The entire surface of the shock absorber 1 is covered with resin. That is, the side surface and both end surfaces of the shock absorbing material 1 in the member axial direction are covered, and the shock absorbing material 1 is protected from the outside world by the coating 1a. The end surface of the shock absorbing material 1 is a surface orthogonal to the member axial direction.

The front end of the coated shock absorber 1 comes into contact with the bumper reinforce 11. On the other hand, the front end portion of the side member 9 has a tubular shape, and the rear end portion (one end portion) of the covered shock absorbing material 1 is provided in the internal space of the tubular portion of the side member 9 (one member). Will be inserted.

In the example of FIG. 2, a flange portion 13 is provided at the front end portion of the shock absorbing material 1 so as to project outward from the coating 1a, and the flange portion 13 is attached to the bumper reinforce 11 by using a bolt or the like (not shown). It is fixed. On the other hand, on the side member 9 side, a flange portion (not shown) that projects outward is provided at the front end portion of the side member 9, and a flange portion similar to the above is provided in the middle of the shock absorbing material 1 in the member axial direction. Both flanges can be connected by bolts or the like.

The bolt 3 is a metal headed bolt and is arranged behind the shock absorbing material 1. The bolt 3 is a rod-shaped connecting member connected to the front end portion of the side member 9, and is arranged so as to cross the internal space of the side member 9. Two bolts 3 are arranged in the vehicle width direction (corresponding to the vertical direction in FIGS. 2B and 2C), but the arrangement and the number of bolts 3 are not particularly limited. For example, in the example of FIG. 2, the bolt 3 crosses the internal space of the side member 9 in the vertical direction, but it is of course possible to arrange the bolt 3 so as to cross in the horizontal direction.

When viewed from the member axial direction of the shock absorbing material 1 (see the arrows in FIGS. 2B and 2C), the bolt 3 and the bumper reinforce 11 (the other member) overlap with the bolt 3. There is no other bolt 3 or the like connected to the side member 9 at the position, and this bolt 3 greatly contributes to shock absorption.

The shaft portion of the bolt 3 penetrates the side member 9 from the lower surface of the side member 9, and the tip of the shaft portion is fixed to the upper surface of the side member 9 by the nut 4. As a result, the bolt 3 is connected and fixed to the front end portion of the side member 9.

A flat surface portion 5 facing the bumper reinforce 11 side is formed on the shaft portion of the bolt 3. In the present embodiment, the cross section orthogonal to the longitudinal direction of the shaft portion of the bolt 3 (hereinafter, may be simply referred to as a cross section) has a shape obtained by cutting a part of a circle with a straight line, and the flat surface portion 5 is the straight line. Formed on the part. The flat surface portion 5 is formed integrally with the shaft portion by processing the shaft portion of the bolt 3, but the present invention is not limited to this. For example, another component having the flat surface portion 5 may be separately attached to the shaft portion of the bolt.

A notch 7 (first notch) is provided in the coating 1a of the surface of the shock absorbing material 1 that is orthogonal to the transverse direction of the bolt 3.

The notch 7 is formed along a direction orthogonal to the member axial direction of the shock absorbing material 1 (hereinafter, may be referred to as a member axis orthogonal direction), and overlaps with the bolt 3 when viewed from the member axial direction of the shock absorbing material 1. It is provided at the position. The shape of the notch 7 in the longitudinal direction is straight, and the cross section in the depth direction is triangular.

A plurality of notches 7 are provided in parallel at intervals in the member axial direction of the shock absorbing material 1. Of these, the notch 7 closest to the bolt 3 is provided at a position at a distance d1 from the rear end surface of the coated shock absorber 1. The distance d1 is, for example, equal to or greater than the thickness of the coating 1a on the rear end surface of the shock absorbing material 1. On the other hand, the distance d2 between the notches 7 adjacent to each other in the axial direction of the member is set to, for example, the thickness of the coating 1a on the side surface of the shock absorbing material 1. The formation range A of the notch 7 in the member axial direction is not particularly limited, and it can be formed over the entire length of the shock absorbing material 1 in the member axial direction.

3 (a) and 3 (b) show the shock absorbing mechanism 2 in the state where the collision load is applied in the same manner as in FIGS. 2 (a) and 2 (c), respectively, and FIG. 3 (c) shows FIG. 3 (c). It is an enlargement of the coating 1a near the notch 7 in a).

In the present embodiment, when a collision load is applied in the direction indicated by the arrow B in FIGS. 3A and 3B and the bumper reinforce 11 is pushed toward the side member 9, the flat surface portion 5 of the bolt 3 becomes the impact absorbing material 1. A part of the rear end surface is pressed forward, local compression is generated in the shock absorbing material 1, the wood is hardened, and the compressed portion 15 is formed. As described above, in the present embodiment, the collision load is absorbed by the compression of the shock absorbing material 1. The other portion of the shock absorbing material 1 (the portion not pressed by the flat surface portion 5) enters the internal space of the side member 9 while being sheared and deformed by the flat surface portion 5 of the bolt 3.

In the above-mentioned collision process, the coating 1a of the side surface of the shock absorbing material 1 that is orthogonal to the transverse direction of the bolt 3 (the upper surface and the lower surface of FIG. 3A) is also pressed by the bolt 3 and compressed. If the coating 1a does not have a notch 7, when the coating 1a is compressed, it buckles irregularly as shown in FIG. 4, and the buckled coating 1a deeply penetrates between the bolt 3 and the shock absorber 1 to form a lump. , The forming range of the compression portion 15 is reduced, and the shock absorbing effect may be impaired.

On the other hand, in the shock absorbing mechanism 2 of the present embodiment, since the notch 7 is formed in the coating 1a as described above, the compressed coating 1a buckles regularly as shown in FIG. 3C. That is, the coating 1a buckles at the position of the notch 7 as a peak or a valley, and is folded shallowly at a distance d2 (see FIG. 2B). Therefore, the formation of the compression portion 15 is not hindered as in the example of FIG.

In FIG. 5, the relationship between the displacement of the bumper reinforce 11 and the load received by the bolt 3 (the load absorbed by the compression of the shock absorbing material 1) in the above collision process is shown on the vertical axis as the load and the horizontal axis as the side of the bumper reinforce 11. It is a figure shown as the displacement to the member 9 side.

The solid line 21 is a case where the notch 7 is provided in the coating 1a on the side surface of the shock absorbing material 1 as in the present embodiment (see FIG. 3), and the buckled coating 1a as described above hinders the formation of the compression portion 15. Therefore, it is possible to stably receive a large collision load.

On the other hand, the dotted line 23 is a case where the notch 7 is not provided (see FIG. 4), and when the formation of the compression portion 15 is hindered by the irregularly buckled coating 1a, the displacement proceeds with a low load, and the intended impact absorption effect is obtained. May not be obtained.

As described above, in the present embodiment, a notch 7 in the member axis orthogonal direction of the shock absorbing material 1 is provided in the coating 1a of the side surface of the shock absorbing material 1 that is orthogonal to the transverse direction of the bolt 3. The coating 1a compressed by the bolt 3 can be prevented from buckling irregularly at the time of collision, and the coating 1a can be buckled in a desired buckling state. As a result, the coating 1a can be folded shallowly to minimize the intrusion of a mass of the coating 1a between the shock absorbing material 1 and the bolt 3, and the intended shock absorption can be realized.

The position of the notch 7 is set in consideration of the position where the coating 1a is compressed, but since the compression of the coating 1a often occurs at the position corresponding to the bolt 3, the shock absorbing material 1 is used as in the present embodiment. It is preferable to provide the notch 7 at a position overlapping the bolt 3 when viewed from the member axial direction.

However, the present invention is not limited to this. For example, in the present embodiment, the bolt 3 is arranged behind the shock absorbing material 1, but the bolt 3 may penetrate the shock absorbing material 1. Further, in the present embodiment, the metal bolt 3 is used as the connecting material, but the connecting material may be any one connected to the side member 9, and the connecting material is not limited to the bolt 3 and may be a pin or the like. The material is not limited to metal, but may be ceramic or the like.

Further, in the present embodiment, the cross section of the connecting material (bolt 3) is formed by cutting a part of a circle with a straight line, but the cross-sectional shape of the connecting material is not limited to this. For example, FIG. 6A shows a shape in which a semicircle and a rectangle are combined, and has a flat surface portion 5 in the rectangular portion. Further, as shown in FIGS. 6 (b) and 6 (c), it is also possible to provide the connecting member with the flat surface portion 5 having a polygonal cross section (FIG. 6 (b) is a quadrangular shape and FIG. 6 (c) is a hexagonal shape). .. By providing the flat surface portion 5 on the connecting material in this way, a large collision load can be stably received, and the impact absorption effect becomes large.

Further, a concave surface portion may be provided instead of the flat surface portion 5, and the same effect as when the flat surface portion 5 is provided can be obtained. For example, as shown in FIG. 7 (a), a part of a circle is cut out with an arc to form a cross-sectional shape, or as shown in FIG. 7 (b), a part of a rectangle is cut out with an arc to form a cross-sectional shape. Can be provided. Further, the concave surface portion 6 is not limited to an arc shape, and may be provided with a concave surface portion 6 formed in a wedge shape by a straight line, for example, having a cross-sectional shape obtained by cutting a part of a rectangle into a wedge shape as shown in FIG. 7 (c).

Alternatively, the cross section of the connecting member may be, for example, circular, and the flat surface portion 5 and the concave surface portion 6 may not be provided. In this case, the existing bolt can be used as it is as a connecting material.

Further, in the present embodiment, the side surface and both end surfaces of the shock absorbing material 1 are covered with the coating 1a, but only the side surface of the shock absorbing material 1 may be covered. Further, the coating 1a is not limited to resin, and may be made of metal.

Further, in the present embodiment, the cross section of the notch 7 in the depth direction is triangular, but the cross section of the notch 7 is not limited to this. For example, it is possible to have a rectangular cross section as shown in the notch 7a of FIG. 8A, or a semicircular cross section as shown in the notch 7b of FIG. 8B.

Further, in the present embodiment, the shape of the notch 7 in the longitudinal direction is linear, but the shape of the notch 7 in the longitudinal direction is not limited to this. For example, it is possible to make a perforation shape that is discontinuous in the longitudinal direction as shown in the notch 7c in FIG. 9A. Further, the semicircle is repeated in a wavy shape as shown in the cut 7d of FIG. 9 (b), the triangular wave shape is formed as shown in the cut 7e of FIG. 9 (c), or the cut 7f of FIG. 9 (d) is used. It is possible to make it rectangular and wavy.

The shape of the notch in the longitudinal direction and the cross-sectional shape in the depth direction are selected so that the coating 1a can be buckled in a desired state. For example, since the shock absorbing material 1 is made of wood, the surface is inhomogeneous due to grain or the like, and when a resin or the like is used for the coating 1a, unevenness occurs due to the pressure during molding, and the thickness of the coating 1a is not uniform. There is a case. In this case, for example, by making the shape of the notch in the longitudinal direction wavy, there is a possibility that a desired buckling state can be robustly realized against such a variation in coating thickness. Further, the buckling characteristics differ depending on the material of the coating 1a, and the cross-sectional shape of the notch 7 in the depth direction is, for example, a triangle (see FIG. 2A) or a rectangle (see FIG. 8A) depending on the buckling characteristics. , Semi-circular (see FIG. 8B) and the like.

Further, in the present embodiment, a plurality of notches 7 are provided in parallel, but the notches 7 are not limited to those provided in parallel, and in some cases, only one notch 7 may be provided.

Hereinafter, another example of the present invention will be described as the second to fourth embodiments. The differences between the first embodiment and the first embodiment will be described, and the same configurations will be omitted with reference to the same reference numerals in the drawings and the like. In addition, the configurations described in each embodiment, including the first embodiment, can be combined as needed.

[Second Embodiment]
FIG. 10A is a diagram showing the shock absorbing mechanism 2a according to the second embodiment in the same manner as in FIG. 2B.

In this shock absorbing mechanism 2a, the formation position of the notch 7 is different from that of the first embodiment. That is, in the shock absorbing mechanism 2a, the two bolts 3 are close to each other, and in such a case, the shock absorbing material 1 and the coating 1a may be compressed between the bolts 3. Therefore, in the present embodiment, when the irregular buckling of the coating 1a described above becomes a problem between the bolts 3, the notch 7 is provided so as to be continuous at the position overlapping the bolt 3 and the position between the bolts 3. ing. In the example of FIG. 10, both ends of the notch 7 overlap with the total width of each bolt 3, but both ends of the notch 7 may be arranged so as to overlap a part of each bolt 3 in the width direction. In some cases, the notch 7 can be provided only at the position between the bolts 3.

[Third Embodiment]
FIG. 11A is a diagram showing the shock absorbing mechanism 2b according to the third embodiment in the same manner as in FIG. 2B.

The shock absorbing mechanism 2b has a notch 8 in the member axial direction (second notch) in addition to the above-mentioned notch 7 in the member axis orthogonal direction on a surface of the side surface of the shock absorbing material 1 orthogonal to the transverse direction of the bolt 3. Is different from the first embodiment in that the above is further provided. The notches 8 are provided one by one at positions corresponding to both sides of the flat surface portion 5 of the bolt 3.

FIG. 11B is a perspective view showing the coating 1a. As shown in the figure, the notch 8 is formed in the transverse direction of the bolt 3 (vertical direction in FIG. 11B) in the coating 1a of the rear end surface (corresponding to the front surface in FIG. 11B) of the shock absorbing material 1. The notch 8 in FIG. 11 (a) is provided by extending the notch 8 of the coating 1a on the rear end surface to the coating 1a on the side surface.

As described with reference to FIG. 3B and the like, at the time of a collision, the portion of the shock absorbing material 1 that is not pressed by the bolt 3 enters the internal space of the side member 9, but at this time, the coating 1a is pulled by the portion. The notch 7 may prevent the desired buckling state from being achieved. Therefore, in the present embodiment, a notch 8 in the axial direction of the member is provided in the coating 1a, and the coating 1a is broken at the position of the notch 8 at an early stage to prevent the coating 1a from being pulled as described above.

In particular, in the present embodiment, the coating 1a of the shock absorbing material 1 is broken at an early stage at the positions of the notches 8 on both sides of the flat surface portion 5 of the bolt 3, and the coating 1a is in a desired buckling state by the notches 7 provided between them. Can be done. At this time, the portion where the coating 1a is buckled by the bolt 3 is limited to the position corresponding to the bolt 3, and the influence on the compression of the wood can be reduced. However, the arrangement and number of notches 8 are not limited to this.

[Fourth Embodiment]
FIG. 12 is a diagram showing a shock absorbing mechanism 2c according to a fourth embodiment. 12 (a) and 12 (b) are views showing the shock absorbing mechanism 2c in the same manner as in FIGS. 2 (b) and 2 (c), respectively, and FIGS. 12 (c) and 12 (d) are shown in FIGS. 12 (b), respectively. It shows the cross section in the vertical direction along the lines cc and dd.

This shock absorbing mechanism 2c is different from the first embodiment in that shock absorption is performed by shearing the shock absorbing material 1.

That is, in the shock absorbing mechanism 2c, the front end portion (the other end portion) of the coated shock absorbing material 1 is from the opening 110 provided in the rear wall of the tubular bumper reinforcement 11a to the bumper reinforcement 11a (the other member). Inserted into the interior space. A gap is provided between the coated front end surface of the shock absorber 1 and the front wall of the bumper reinforce 11a.

The shock absorbing mechanism 2c further includes a bolt 3 (connecting material) connected to the bumper reinforce 11a in addition to the configuration of the shock absorbing mechanism 2 of the first embodiment. The bolt 3 is provided in front of the shock absorbing material 1 and is arranged so as to cross the internal space of the bumper reinforce 11a. The transverse direction thereof is the same as that of the bolt 3 behind the shock absorbing material 1.

Similar to the example of FIG. 2A, the shaft portion of the bolt 3 in front of the shock absorbing material 1 penetrates the bumper reinforcement 11a from the lower surface of the bumper reinforcement 11a, and the tip of the shaft portion is the upper surface of the bumper reinforcement 11a by the nut 4. Is fixed to. The bolt 3 is arranged so that the flat surface portion 5 is located on the side member 9 side.

Further, when viewed from the member axial direction (see the arrows in FIGS. 12A and 12B), the front and rear bolts 3 of the shock absorbing material 1 are arranged at different positions, and the flat surface portions 5 do not face each other. It has become like. Further, when viewed from the axial direction of the member, between the bolt 3 in front of the shock absorbing material 1 and the side member 9, another other connected to the bumper reinforce 11a at a position overlapping the bolt 3 in front of the shock absorbing material 1. Bolt 3 etc. do not exist.

In the front wall of the bumper reinforce 11a, an opening 111 is formed at a position overlapping the bolt 3 behind the shock absorbing material 1 when viewed from the member axial direction.

In the present embodiment, not only the coating 1a on the rear end side of the shock absorbing material 1 but also the coating 1a on the front end side of the shock absorbing material 1 is provided with the notch 7 as in the first embodiment.

In the present embodiment, when a collision load is applied and the bumper shear 11a is pushed toward the side member 9 as shown by the arrow B in FIG. 13, the bolt 3 behind the shock absorber 1 is impacted by the flat surface portion 5 at the initial stage of the collision. A part of the rear end surface of the absorbent material 1 is pressed forward, and the bolt 3 in front of the shock absorbing material 1 presses a part of the front end surface of the shock absorbing material 1 rearward by the flat surface portion 5, thereby absorbing the impact. Shearing of material 1 is induced.

Then, the shock absorbing material 1-1 at a position overlapping the bolt 3 in front of the shock absorbing material 1 when viewed from the member axial direction advances rearward in the internal space of the side member 9. On the other hand, the shock absorbing material 1-2 at a position overlapping the bolt 3 behind the shock absorbing material 1 advances forward in the bumper reinforce 11a toward the opening 111.

In the fourth embodiment, the impact is absorbed by the occurrence of shearing, and the collision load transmitted to the side member 9 side can be reduced. In this case as well, the coating 1a on the side surface of the shock absorbing material 1 that is orthogonal to the transverse direction of the front and rear bolts 3 can be brought into a desired buckling state by the cuts 7 at both ends of the shock absorbing material 1, and the intended impact is achieved. Absorption can be realized.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modified examples or modified examples within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.

For example, in each of the above embodiments, a shock absorbing mechanism is installed between the bumper reinforcement and the side member of the vehicle 10, but the shock absorbing mechanism transmits the load to the load receiving member that receives the load at the time of collision in the vehicle 10. It may be provided between the members to be transmitted, and is not limited to the one provided between the bumper reinforcement and the side member. For example, it may be provided between the body body on the side of the vehicle and the battery case inside the vehicle for the purpose of reducing the collision load at the time of collision on the vehicle side. Further, the type of the vehicle 10 is not particularly limited.

1: Impact absorbing material 1a: Coating 2, 2a, 2b, 2c: Impact absorbing mechanism 3: Bolt 4: Nut 5: Flat surface portion 6: Concave portion 7, 7a, 7b, 7c, 7d, 7e, 7f, 8: Notch 9: Side member 10: Vehicle 11: Bumper reinforce 11a: Bumper reinforce 13: Flange part 15: Compression part

Claims (7)

A shock absorbing mechanism for reducing the collision load applied to the vehicle.
A load receiving member that receives a collision load and a transmitted member that transmits the collision load from the load receiving member are provided.
A wooden columnar shock absorber whose one end in the axial direction of the member is inserted into the internal space of the load receiving member and one of the members to be transmitted.
A first connecting member connected to the one member so as to cross the internal space of the one member,
Equipped with
At the time of collision, the first connecting member presses a part of the end face of the one end portion of the shock absorbing material.
The side surface of the shock absorbing material is covered, and the coating of the surface of the side surface orthogonal to the transverse direction of the first connecting material is provided with a first notch in the direction orthogonal to the member axial direction of the shock absorbing material. A shock absorbing mechanism characterized by being orthogonal. The shock absorbing mechanism according to claim 1, wherein the first notch is provided at a position overlapping the first connecting member when viewed from the member axial direction of the shock absorbing material. The first or second aspect, wherein a second notch in the member axial direction of the shock absorbing material is provided on the coating of the surface of the side surface orthogonal to the transverse direction of the first connecting member. Shock absorption mechanism. The first connecting member has a flat surface portion or a concave surface portion facing the other member of the load receiving member and the transmitted member.
The second notch is provided at a position corresponding to both sides of the flat surface portion or the concave surface portion.
The shock absorbing mechanism according to claim 3, wherein the first notch is provided between the second notches. The shock absorbing mechanism according to any one of claims 1 to 4, wherein the shape of the first notch in the longitudinal direction is wavy. The shock absorbing mechanism according to any one of claims 1 to 5, wherein the cross-sectional shape of the first cut in the depth direction is any one of a triangle, a rectangle, and a semicircle. The other end of the shock absorbing material in the member axial direction is inserted into the internal space of the other member of the load receiving member and the transmitted member.
A second connecting member connected to the other member so as to cross the internal space of the other member in the same crossing direction as the crossing direction of the first connecting member is further provided.
At the time of collision, the second connecting member presses a part of the end face of the other end of the shock absorber.
The first and second connecting members are arranged at different positions when viewed from the member axial direction of the shock absorbing material.
The shock absorbing mechanism according to claim 1, wherein the first notch is provided on the one end side and the other end side of the shock absorbing material.

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