JP2001151055A - Impact absorbing structure for vehicle parts with curved surfaces - Google Patents

Abstract

An object of the present invention is to provide a structure capable of sufficiently and efficiently absorbing external impact applied to a curved surface of a vehicle component having a curved surface, a cylindrical surface, a spherical surface, or the like. A flat first rib (1) is provided on both surfaces of a substrate (12).
A shock absorbing structure in which a plurality of 4a (16a) and a plurality of second ribs 14b (16b) are combined so as to intersect with each other or form a right-angled corner, and are integrally erected. 10, the tip 32 of at least one of the first and second ribs 14 a, 14 b erected on one surface of the substrate 12 is brought into contact with the curved surface 23 of the vehicle component 24, or the gap is increased. The shock absorbing structure 1 is disposed in a state where the shock absorbing structure 1
0 to the curved surface 23 of the vehicle part 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorbing structure for a vehicle component having a curved surface, and more particularly, to a vehicle component having a curved surface such as a curved surface, a cylindrical surface, or a spherical surface, which advantageously absorbs external impact applied to the curved surface. It is related to the structure for.

[0002]

2. Description of the Related Art Generally, in a vehicle such as an automobile, a shock from the outside is absorbed by a vehicle component, such as a door panel, a quarter panel, or a pillar, which may be in contact with an occupant in the event of a collision or the like. In order to protect the occupant, a shock absorbing structure is provided.

[0003] By the way, as such a shock absorbing structure, various structures having various structures have been clarified, and one of them has a flat shape made of a synthetic resin material. On one surface of the substrate, a so-called rib structure, in which a plurality of plate-shaped ribs are integrally erected at a predetermined height in a state of being combined in a lattice shape so as to intersect with each other, is provided. ,Proposed.
And, as is well known, such a rib structure has many advantages such as excellent moldability and tuning property, and has a high degree of design freedom. Types of vehicle parts.

However, even if a rib structure having the above-described configuration is attached to a vehicle component having a curved surface such as a curved surface, a cylindrical surface, or a spherical surface, sufficient external impact applied to the curved surface of the vehicle component can be obtained. Was difficult to absorb.

That is, for example, the impact applied to a power steering motor having a cylindrical outer peripheral surface is
In a case where the rib structure is used for absorption, generally, the rib structure is provided between the power steering motor and an instrument panel disposed on the vehicle interior side of the power steering motor. The surface opposite to the formation side of the power steering motor faces or contacts the outer peripheral surface of the power steering motor, and the distal end surfaces of the plurality of ribs face or contact the body-side surface of the instrument panel. Or, on the contrary, the opposite side surface of the substrate faces or contacts the surface of the instrument panel on the vehicle body side, and the tip surfaces of the plurality of ribs face or contact the outer peripheral surface of the power steering motor. It will be arranged in the state where it does. Then, the deformation of the plurality of ribs of the rib structure arranged as described above, for example, absorbs the impact applied to the cylindrical outer peripheral surface of the power steering motor due to the contact of the occupant's leg, particularly the knee, etc. with the instrument panel. It can be achieved.

However, in a state in which the substrate of the rib structure is opposed to or contacted with the outer peripheral surface of the power steering motor, that is, in a state where there are no plural ribs on the power steering motor side, the rib structure When a shock is input, the board may be slid along the bending direction of the outer peripheral surface of the power steering motor when an impact is input, and the deformation amount of the plurality of ribs may be insufficient. Then, it becomes impossible to obtain a sufficient amount of shock absorption. On the other hand, in the case where the rib structure is arranged in a state where the substrate is opposed to or brought into contact with the surface of the instrument panel on the vehicle body side, that is, in a state where there are no plural ribs on the impact input side, In the initial stage of the impact input, the impact load value applied to the rib structure, the so-called initial load value, becomes low, whereby the absorption efficiency of the impact energy decreases.

[0007]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a vehicle component having a curved surface such as a curved surface, a cylindrical surface, or a spherical surface. An object of the present invention is to provide a structure capable of sufficiently and efficiently absorbing an external impact applied to the curved surface.

[0008]

According to the present invention, there is provided a structure for absorbing external impact applied to a curved surface of a vehicle component having a curved surface such as a curved surface, a cylindrical surface, or a spherical surface. And on both surfaces of the flat plate-shaped substrate, respectively, a plurality of plate-shaped first ribs extending in parallel to each other with a predetermined height, and with respect to the extending direction of the plurality of first ribs. A plurality of plate-shaped second ribs extending in parallel to each other at a predetermined height in a right angle direction are combined with each other so as to intersect with each other or form a right angle corner, and are integrally erected. And a plurality of first ribs and a plurality of second ribs that are provided on one surface of the substrate. At least one of Are arranged so as to be brought into contact with the curved surface of the vehicle component or to be opposed to each other at an interval, and the external impact is transmitted to the curved surface of the vehicle component via the impact absorbing structure. And a plurality of first and second ribs erected on both surfaces of the substrate of the shock absorbing structure, respectively.
The gist of the present invention is a shock absorbing structure for a vehicle part having a curved surface, characterized in that the shock from the outside can be absorbed.

In short, in the shock absorbing structure for a vehicle component having a curved surface according to the present invention, the shock absorbing structure for absorbing an externally applied impact on the curved surface of the vehicle component is formed of a synthetic resin substrate. It has a plurality of first and second ribs erected integrally on both surfaces, and is configured to be able to absorb such external impact by deformation of the plurality of first and second ribs. In addition, the plurality of first and second ribs on one surface of the substrate extend toward the curved surface of the vehicle component so as to transmit an external impact to the curved surface of the vehicle component, and The plurality of first and second ribs on the other surface of the substrate are arranged so as to extend toward the input side of the impact applied to the curved surface of the vehicle component.

Therefore, in such a shock absorbing structure,
A plurality of first and second ribs on the other side of the substrate of the shock absorbing structure are present on an input side of an external shock to the vehicle component, and the plurality of first and second ribs are provided. The ribs are deformed by external impacts, so that external impacts can be received.Therefore, a conventional rib in which a plurality of ribs are erected only on one surface of the substrate. Unlike in the case where the plurality of ribs are not arranged on the impact input side in the structure, the initial load value can be advantageously prevented from being reduced. Moreover, since the plurality of first and second ribs on the other surface and the plurality of first and second ribs on the one surface are erected on both surfaces of the substrate, respectively. Each of the plurality of first and second ribs can be lower in height than the plurality of ribs erected only on one surface of the substrate in the conventional rib structure, and A greater deformation or breaking strength is provided as compared to the plurality of ribs, so that the initial load value can be increased more advantageously than with the rib structure, which is required. The size can be effectively secured.

Further, in the shock absorbing structure for a vehicle component according to the present invention, by adopting the above-described configuration, a plurality of first and second portions on the one surface of the substrate are provided on the curved surface side of the vehicle component. Two ribs are provided, and the tip of at least one of the plurality of first and second ribs is brought into contact with the curved surface of the vehicle component, or is provided at an interval. Since the ribs are opposed to each other, when an impact is applied from the outside, the ribs contacting or facing the curved surface can be deformed while increasing the contact area with the curved surface. .

Therefore, in such a shock absorbing structure,
Unlike the case where the rib structure is arranged such that a plurality of ribs do not exist on the curved surface side of the vehicle component, the rib structure is moved between the curved surface and the deformed rib with an increase in the deformation amount of the rib. The frictional force of the vehicle part can be increased, and the restraining force of the vehicle part by such a rib can be advantageously increased. As a result, the shock absorbing structure can be moved along the bending direction of the curved surface of the vehicle part by an external impact. Sliding movement can be prevented very effectively.

Therefore, according to the shock absorbing structure for a vehicle part having a curved surface according to the present invention, the deformation of the ribs becomes insufficient due to the sliding movement of the shock absorbing structure caused by an external impact. The deformation amount of the rib can be sufficiently ensured, and a sufficient amount of shock absorption can be obtained, and the shock load applied to the shock absorbing structure in the initial stage of shock input is reduced. Also, it is possible to advantageously prevent the absorption efficiency of impact energy from being reduced, and as a result, external impact applied to the curved surface of the vehicle component can be sufficiently and efficiently absorbed. It becomes.

According to one advantageous aspect of the shock absorbing structure for a vehicle component having a curved surface according to the present invention, the plurality of the shock absorbing structures are provided on both surfaces of the substrate. Of the first and second ribs, the plurality of first and second ribs on one surface of the substrate are larger than the first and second ribs on the other surface of the substrate. The shock absorbing structure is configured to have a breaking strength, and at least one end of the plurality of first and second ribs on one surface of the substrate is the same as the vehicle. The components are arranged so as to be brought into contact with the curved surface of the component or to be opposed at an interval.

In the shock absorbing structure for a vehicle component having such a configuration, the plurality of first and second ribs extending toward the curved surface of the vehicle component include the plurality of first and second ribs extending toward the impact input side. Since the deformation or breaking strength is greater than that of the first and second ribs, it is possible to secure a sufficiently large impact load at the initial stage of impact input. With a limited amount of deformation of the first and second ribs, the impact energy can be more sufficiently absorbed, and the efficiency of absorbing the impact energy can be further improved.

According to another preferred embodiment of the shock absorbing structure for a vehicle component having a curved surface according to the present invention,
In the sliding movement direction of the shock absorbing structure with respect to the curved surface of the vehicle component, a locking member that can be locked to the shock absorbing structure is provided at a fixed position, and the movement of the shock absorbing structure in the sliding movement direction is provided. It will be configured to be blocked.

In the shock absorbing structure for a vehicle component having such a configuration, when the shock absorbing structure is slid along the curved direction of the curved surface of the vehicle component when an external shock is input, By locking the shock absorbing structure to such a locking member, it is possible to more advantageously prevent further sliding movement, whereby the shock absorbing structure absorbs an external shock. Stopped in a position to transmit to the vehicle components, the plurality of first and second ribs can be sufficiently deformed within their deformation limits, so that external impacts are more sufficiently reduced. It can be absorbed.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, in order to clarify the present invention more specifically, the structure of a shock absorbing structure for a vehicle part having a curved surface according to the present invention will be described in detail with reference to the drawings. It shall be.

First, FIG. 1 to FIG.
As one embodiment of a shock absorbing structure for a vehicle component having a curved surface, an example of a shock absorbing structure used for a shock absorbing structure of a power steering motor is schematically illustrated.
As is clear from those figures, the shock absorbing structure 10
Has a rectangular housing shape as a whole,
2, a plurality of upper ribs 14 are erected on the entire surface of one surface (the upper surface of the substrate 12 in FIG. 3), while the other upper surface (the lower surface of the substrate 12 in FIG. 3) is provided. A plurality of lower ribs 16 having a lower height than the upper ribs 14 are provided upright on the entire surface. The substrate 12 constituting the shock absorbing structure 10 is formed in a relatively thick rectangular flat plate shape.
The lower rib 4 and the lower rib 16 are each provided in a thin flat plate shape.

Incidentally, the substrate 12 and the plurality of upper and lower ribs 14 and 16 constituting the shock absorbing structure 10 are both integrally formed of a synthetic resin material. Here, the type of the synthetic resin material is not particularly limited. That is, the shock absorbing structure 1
As the synthetic resin material giving 0, any of the constituent materials of a rib structure used for a conventional general shock absorbing structure of a vehicle component can be used, and for example, a polyolefin-based material such as polypropylene or polyethylene can be used. Those appropriately selected from the resin materials are each independently,
Alternatively, it is used in the form of a mixed material or copolymer of two or more types. Of course, any one of the substrate 12, the upper ribs 14, and the lower ribs 16
The other two may be made of a different kind of resin material, or all three may be
Even if they are made of different kinds of resin materials, there is no problem at all. The thicknesses of the substrate 12 and the upper and lower ribs 14 and 16 are not limited at all, but in order to ensure appropriate deformation or breaking strength and excellent formability, the upper and lower ribs 14 and 16 are not limited. , 16 preferably have a thickness of about 0.8 to 3.5 mm.
The thickness of 2 is desirably about 1 to 5 mm.

The plurality of upper ribs 14 of the shock absorbing structure 10 are provided on one surface of the substrate 12.
Four substrates extending in parallel with each other in the length direction while facing each other at a certain interval in the width direction;
2 that extend in parallel with each other in the width direction while facing each other at a constant interval in the length direction of the two ribs.
a, while six are horizontal ribs 14b. Also, even if there are a plurality of lower ribs 16,
On the surface opposite to the side on which the upper ribs 14 of the substrate 12 are formed, four substrates extending in parallel in the length direction while being opposed to each other at a constant interval in the width direction thereof, and 12 at regular intervals in the length direction of the wire 12 and extend in parallel with each other in the width direction and extend in parallel with each other. On the other hand, six things are horizontal ribs 16b
It has been.

Accordingly, in the shock absorbing structure 10 of the present embodiment, the upper vertical rib 14a and the upper horizontal rib 14b having a flat plate shape cross each other on one surface of the substrate 12. The lower ribs 16a and the lower horizontal ribs 16b having a flat plate shape on the other surface.
Are formed as an integrally formed product which is integrally erected in a state of being assembled in a lattice shape so as to intersect with each other. As is clear from this, in the present embodiment, the first rib is formed by the vertical ribs 14a and 16a, and the second rib is formed by the horizontal ribs 14b and 16b. It is.

In the shock absorbing structure 10, the upper ribs 14 and the lower ribs 16 are erected on both surfaces of the substrate 12, and the upper ribs 14 and the lower ribs 1 are provided.
6 is lower than the height of the rib in the conventional rib structure in which a plurality of ribs having a plate-like shape are integrally formed on one surface of the substrate, whereby the upper and lower ribs are formed. The ribs 14 and 16 are given greater deformation or breaking strength than the ribs of the conventional rib structure. In this case, particularly, among the upper and lower ribs 14, 16, the lower rib 16 has a lower height than the upper rib 14, so that the deformation or breaking strength of the lower rib 16 is reduced. It is much larger than that of 14.

In order to make the deformation or breaking strength of the lower rib 16 larger than that of the upper rib 14, the height of the lower rib 16 is made lower than that of the upper rib 14, and for example, as shown in FIG. As shown in FIG. 5, the lower ribs 16 are made thicker than the upper ribs 14, or the pitch of the lower ribs 16 (the interval between the opposing lower ribs 16) is reduced, as shown in FIG. 6 is larger than the number of the upper ribs 14 or FIG.
As shown in FIG. 2, a configuration in which at least one of the vertical ribs 14a and the horizontal ribs 14b of the upper ribs 14 is discontinuously formed is appropriately adopted, and the synthetic resin material forming the lower ribs 16 is used. It is also effective to use a material having a higher flexural modulus than the constituent material of the upper rib 14.

Further, in the shock absorbing structure 10, the plurality of lower ribs 16 have a fixed height, respectively, while the four vertical ribs 14 of the plurality of upper ribs 14 are provided.
a and the height of each of the six lateral ribs 14b
Is gradually increased from one side in the width direction to the other side. Thereby, the height of the shock absorbing structure 10 is configured to gradually increase from one side in the width direction toward the other side, and thus the shock absorbing structure 1 is formed.
0, the shape of the tip side of the upper rib 14 is to be installed.
0 (see FIG. 7). Further, in the shock absorbing structure 10, the lower rib 16 (16a, 16b) is provided upright at one corner of the other end in the width direction in which the height of the upper rib 14 is increased.
Are partially protruded with an L-shaped cross section, and the protruding portion is an L-shaped projection 18. Furthermore, mounting portions 20, 20 for mounting the shock absorbing structure 10 to the instrument panel 26 are provided on outer surfaces of the lateral ribs 14b, 14b of the upper ribs 14 erected at both ends in the longitudinal direction of the substrate 12. Are formed integrally with each other. In FIGS. 1 to 3, reference numerals 22, 22 denote bolt insertion holes for inserting and fixing mounting bolts (not shown) to the mounting portions 20, 20.

As shown in FIG. 7, the shock absorbing structure 10 having such a structure has a cylindrical outer peripheral surface 2.
3 and an instrument panel disposed on the vehicle interior side (left side in FIG. 7) of the power steering motor 24 so as to incline toward the vehicle interior side toward the upper side (upward in FIG. 7). 26.

That is, in the shock absorbing structure 10, between the power steering motor 24 and the instrument panel 26, the portion on the other side in the width direction in which the height of the upper rib 14 is increased is located on the upper side. While being positioned and the front end surface 28 of the upper rib 14 is opposed to the vehicle body side surface 30 of the instrument panel 26 with a slight gap, the center of the four vertical ribs 16a of the lower rib 16 Two vertical ribs 16 located at
a, 16a and the tip surfaces 32 of some of the six lateral ribs 16b are opposed to the cylindrical outer peripheral surface 23 of the power steering motor 24 at a predetermined interval. , Are arranged. Although not shown, in such an arrangement state, the shock absorbing structure 10 is mounted on the instrument panel 26 by the bolts inserted into the bolt insertion holes 22, 22 of the mounting portions 20, 20, respectively. It is fixedly mounted at a predetermined mounting position. Thus, in the present embodiment, an external impact on the instrument panel 26 is applied to the instrument panel 26 via the impact absorbing structure 10.
This is transmitted to the cylindrical outer peripheral surface 23 of the power steering motor 24. In addition, unlike the case of this example, the tip surfaces 28 and 32 of the upper and lower ribs 14 and 16 are attached to the vehicle body side surface 30 of the instrument panel 26 and the cylindrical outer peripheral surface 23 of the power steering motor 24, respectively. Of course, it is also possible to dispose the shock absorbing structure 10 in a state where they are in contact with each other.

In this case, a mounting stay 41 integrally provided on the cylindrical outer peripheral surface 23 of the power steering motor 24 is fixed to a chassis (not shown) by mounting bolts 40, so that the power steering motor 24
Are attached to the chassis, but the power steering motor 24
A bracket 38 as a locking member provided with a locking portion 36 made of a metal plate having a predetermined width and exhibiting an L-shaped cross section is provided on the cylindrical outer peripheral surface 23. A part of the surface corresponding to the inner part of the power steering motor 24 is disposed so as to face the cylindrical outer peripheral surface 23 of the power steering motor 24, and is also fastened together by the mounting bolt 40 under such an arrangement, so that the position relative to the chassis is reduced. Fixedly attached.

As described above, the shock absorbing structure 10 is disposed between the instrument panel 26 and the power steering motor 24 so that the lower rib 16 of the shock absorbing structure 10 The L-shaped projection 18 protruding from the power steering motor 24
Bracket 38 disposed above the cylindrical outer peripheral surface 23
The outer surface of the L-shaped projection 18 is positioned so as to extend toward the locking portion 36 of the power steering motor 24 with respect to the surface of the locking portion 36 facing the cylindrical outer peripheral surface 23 of the power steering motor 24. They are engaged in the vertical direction. Thus, the upward movement (in the direction indicated by the arrow in FIG. 7) of the shock absorbing structure 10 is prevented.

Thus, in the present embodiment, as shown in FIG. 8, for example, due to the occurrence of a collision or the like, the occupant's leg 34, particularly the knee, is brought into contact with the instrument panel 26, and the instrument panel 26 When an impact is applied in the vehicle body side direction (right direction in FIG. 8), the upper rib 14 of the shock absorbing structure 10 comes into contact with the vehicle body side surface 30 of the instrument panel 26 and collapses. While being deformed, the lower rib 16 also comes into contact with the cylindrical outer peripheral surface 23 of the power steering motor 24 and is crushed and deformed. Moreover, the upper and lower ribs 1
Since each of the upper ribs 14 and 16 has a lattice-like configuration formed by the vertical ribs 14a and 16a and the horizontal ribs 14b and 16b, when the impact is applied to the instrument panel 26, the vertical ribs 14a of the upper ribs 14 are formed. And horizontal rib 14
b is a vertical rib 16a and a horizontal rib 16b of the lower rib 16.
Are supported by each other so that they can be reliably crushed and deformed in the height direction without falling down.

Here, of the lower ribs 16, two vertical ribs 16a, 1 located at the center in the width direction of the substrate 12 are provided.
6a, the tip surface 32 of each of them is opposed to the cylindrical outer peripheral surface 23 of the power steering motor 24.
From the place where the shock absorbing structure 10 is provided, when a shock is applied to the instrument panel 26, the two vertical ribs 16a, 16a are firstly connected to the power steering motor 24 at the tip corners on the opposite sides. 8 and, as shown in FIG. 8, the cylindrical outer peripheral surface 2
3 and is crushed and deformed so as to spread outward while increasing the contact area with the cylindrical outer peripheral surface 23, whereby the cylindrical outer peripheral surface 23 of the power steering motor 24 is crushed. The frictional force between the two deformed lower vertical ribs 16a, 16a is increased, and the restraining force of the power steering motor 24 by the vertical ribs 16a, 16a can be increased. Furthermore, a plurality of horizontal ribs 16 in the lower rib 16
b, the tip surface 32 is the power steering motor 2
Even if the two are opposed to the cylindrical outer peripheral surface 23 of the substrate 4, they are crushed and deformed in substantially the same state as the two vertical ribs 16a, 16a located at the center in the width direction of the substrate 12, Thus, the restraining force of the power steering motor 24 by the lateral rib 16b can be increased. In addition, even when the upper and lower ribs 14 and 16 are crushed and deformed, the locking state of the L-shaped projection 18 with the locking portion 36 of the bracket 38 is ensured, and the upper side of the shock absorbing structure 10 (FIG. 8, the movement in the direction indicated by the arrow) is prevented.

As described above, in the present embodiment, when an impact is applied to the instrument panel 26 from the outside, the upper ribs 14 extending toward the vehicle body side surface 30 of the instrument panel 26 and the power Since both of the lower ribs 16 in a grid-like shape extending toward the cylindrical outer peripheral surface 23 of the steering motor 24 are surely crushed and deformed in the height direction, the outside of the instrument panel 26 with respect to the instrument panel 26 is reduced. Shock can be advantageously received by the crushing of the upper and lower ribs 14,16, whereby external shocks are only received by the crushing of the ribs extending towards the cylindrical outer peripheral surface 23 of the power steering motor 24. In the unlikely case, lower initial load values are advantageously avoided. It's that.

Moreover, in the present embodiment, both the upper rib 14 and the lower rib 16 are formed by integrally forming a plurality of ribs having a flat plate shape on one surface of the substrate. By being lower than height,
The upper and lower ribs 14 and 16 are provided with greater deformation or breaking strength than the ribs of the conventional rib structure, and the upper and lower ribs 14 and 16 move the shock absorbing structure 10 to the predetermined position. Under the arrangement, the lower rib 16 extending toward the cylindrical outer peripheral surface 23 of the power steering motor 24 is provided.
However, since the height of the upper rib 14 extending toward the vehicle body side surface 30 of the instrument panel 26 is lower, the deformation or breaking strength of the lower rib 16 is further increased than that of the upper rib 14. Therefore, the initial load value can be more advantageously increased as compared with the case where a conventional rib structure is used, and can be effectively secured to a required magnitude.

In the present embodiment, the lower rib 16 is crushed and deformed by an external impact on the instrument panel 26, so that the restraining force of the power steering motor 24 by the lower rib 16 can be increased. In addition, since the upward movement of the shock absorbing structure 10 is restricted by the locking of the L-shaped projection 18 to the locking portion 36 of the bracket 38, when an external shock is input, , Shock absorbing structure 10
Is the cylindrical outer peripheral surface 23 of the power steering motor 24
Can be advantageously prevented from sliding along the bending direction of the vehicle and causing the space between the cylindrical outer peripheral surface 23 and the vehicle body side surface 30 of the instrument panel 26 to move upward. As a result, the shock absorbing structure 10 is stopped between the cylindrical outer peripheral surface 23 of the power steering motor 24 and the vehicle body side surface 30 of the instrument panel 26, and the upper rib 14 and the lower rib 16 Can be sufficiently collapsed and deformed.

Therefore, according to the present embodiment,
The energy of the shock applied to the cylindrical outer peripheral surface 23 of the power steering motor 24 through the shock absorbing structure 10 can be absorbed very efficiently in a sufficient amount.

By the way, the present inventors have actually used the shock absorbing structure 10 according to the present embodiment and some shock absorbing structures having a rib structure slightly different from the shock absorbing structure according to the present invention. An evaluation test of the shock absorbing structure of the power steering motor 24 having the cylindrical outer peripheral surface 23 performed in the above is described below.

That is, first, injection molding is performed using a resin material in which polyethylene is mixed with polypropylene at a ratio of 30% by weight, and as shown in FIG. While the plurality of upper ribs 14 are integrally erected in a state of being assembled in a lattice so as to intersect with each other, the upper rib 1 is provided on the other surface of the substrate 12.
First, the shock absorbing structure 10 in which the lower ribs 16 having a height lower than 4 are integrally erected in a lattice shape so as to intersect with each other is actually manufactured.
And The dimensions of the shock absorbing structure 10 according to the first embodiment are as follows: length × width × height: 150 mm × 70 mm ×
90 mm, height of upper rib: 63 mm, height of lower rib: 2
5 mm, thickness of substrate: 2 mm, thickness of upper rib: 0.8 m
m, thickness of lower rib: 0.8 mm. Also, upper rib 1
In No. 4, both the vertical ribs 14a and the horizontal ribs 14b have the same height.

Further, in the same manner as in the first embodiment,
A shock absorbing structure having the same structure as that of the first embodiment except that the height of the lower rib 16 is the same as that of the lower rib 16 is manufactured.
This was designated as Example 2. Example 2 had the same dimensional specifications as Example 1 except that the height of each of the upper rib 14 and the lower rib 16 was 44 mm. Further, in the same manner as in the first embodiment, as shown in FIG. 9, of the four vertical ribs 16 a of the lower rib 16, only the two vertical ribs 16 a and 16 a erected at the center of the substrate 12 are thick. Shock absorbing structure 42 having the same structure as in the first embodiment except that it is made of meat
This was designated as Example 3. The shock absorbing structure 42 according to the third embodiment is different from the first embodiment except that the thickness of the thick vertical rib 16a in the lower rib 16 is 1.6 mm.
Dimensions were the same as

In the same manner as in the first embodiment, as shown in FIG. 10, in each of the upper rib 14 and the lower rib 16, two vertical ribs 14a and 16a Two vertical ribs 14a, 16a and four horizontal ribs 14b, excluding the two horizontal ribs 14b, 16b,
16b has a structure similar to that of the first embodiment except that the shock absorbing structure 4 has a partially thickened portion.
4 was manufactured, and this was designated as Example 4. Further, Example 1
In the same manner as in the first embodiment, only the upper rib 14 is configured to have a thick portion as shown in FIG.
Only the shock absorbing structure 44 having the same structure as that of the first embodiment except that only the thick portion as shown in FIG. 10 is partially formed as shown in FIG. Example 5 and the latter as Example 6. In the shock absorbing structures 44 of Examples 4 to 6, the thickness of the thick portion of the upper rib 14 and the lower rib 16 is set to 1.7 mm, and the thickness of the portion other than the thick portion is set to 0. The dimensions were the same as those in Example 1 except that the length from the intersection of the vertical ribs 14a, 16a and the horizontal ribs 14b, 16b to the end of the thick portion was 5 mm.

Further, in the same manner as in the first embodiment, as shown in FIG.
Among them, a shock absorbing structure having the same structure as that of the first embodiment except that a discontinuous portion is formed at a longitudinal central portion of the four lateral ribs 14b except for those located at both longitudinal end portions of the substrate 12. The body 46 and the upper rib 14 as shown in FIG.
Out of the four vertical ribs 14a, the two vertical ribs 14a located at the center in the width direction of the substrate 12 are the same as those in the first embodiment except that a discontinuous portion is formed between adjacent horizontal ribs 14b. Shock absorbing structure 48 having a structure
Are manufactured respectively, and the former is referred to as Example 7;
The latter was designated as Example 8. These Examples 7 and 8
The dimensions were the same as in Example 1, except that the length of the discontinuous portion between the vertical rib 14a and the horizontal rib 14b in the upper rib 14 was 10 mm.

Further, injection molding was performed using a resin material in which talc was mixed at a ratio of 20% by weight with respect to polypropylene, and the upper and lower ribs 14 and 16 were subjected to the impact molding of Example 1. An impact absorbing structure having the same structure as that of the example 1 except that a bending strength higher than that of the absorbing structure 10 was provided was manufactured, and this example was referred to as an example 9. Similarly, the upper rib 14 has a structure as shown in FIG.
A shock absorbing structure having the structure shown in FIG. 9 and having the same structure as that of Example 1 except that high bending strength is given to the upper and lower ribs 14 and 16 is manufactured. This was designated as Example 10. In addition, Example 9
In the tenth embodiment, the length of the discontinuous portion of the upper rib 14 is set to 10 mm, and the length of the lower rib 1 is set to 10 mm.
6, except that the thickness of the thickened vertical rib 16a was 1.6 mm.

For comparison, a structure in which a plurality of flat plate-shaped ribs are integrally erected on one surface of a substrate so as to intersect with each other in a lattice-like manner. A shock absorbing structure was manufactured in the same manner as in Example 1, and this was designated as Comparative Example 1. The dimensions of Comparative Example 1 are length × width × height: 150 mm × 70 mm × 9.
0 mm, rib height: 88 mm, substrate thickness: 2 mm,
Rib thickness: 0.8 mm.

Then, each of the ten types of shock absorbing structures (Examples 1 to 10) having the structure according to the present invention obtained as described above, and the conventional structure different from the structure according to the present invention. Shock Absorbing Structure Having Comparative Example 1
As shown in FIG. 7, eleven types of shock absorption are provided between the cylindrical outer peripheral surface 23 of the power steering motor 24 and the vehicle body side surface 30 of the instrument panel 26 by using the two twelve (11 types). Each of the structures (Examples 1 to 11 and Comparative Example 1) was fixed one by one. At this time, in each of the shock absorbing structures of the first to tenth embodiments, the upper rib
The lower rib 16 is arranged so as to extend toward the cylindrical outer peripheral surface 23 of the power steering motor 24 while extending toward zero. Further, one of the two comparative examples 1 has a plurality of ribs formed by the power steering motor 24.
Are arranged so that the surface of the substrate opposite to the erected side of the plurality of ribs faces the vehicle body side surface 30 of the instrument panel 26. In the remaining one of the examples 1, the plurality of ribs extend toward the vehicle body side surface 30 of the instrument panel 26, and the surface of the substrate opposite to the side where the plurality of ribs are erected is the power steering motor 24. It was arranged so as to face the cylindrical outer peripheral surface 23.

Thereafter, a known impact test is performed by applying an appropriate impact to the surface of the instrument panel 26 opposite to the vehicle body side surface 30 in the same manner as in the prior art. The relationship between the load value and the displacement was examined. The results are shown in FIGS. In the two comparative examples 1, the plurality of ribs extend toward the cylindrical outer peripheral surface 23 of the power steering motor 24, and the surface of the substrate opposite to the side where the plurality of ribs are erected is the instrument. FIG.
3 to 15, shown as Comparative Example 1-a, a plurality of ribs extending toward the vehicle body side surface 30 of the instrument panel 26, and a surface of the substrate opposite to a side where the plurality of ribs are erected. However, the one arranged so as to face the cylindrical outer peripheral surface 23 of the power steering motor 24 is the one shown in FIG.
3 to 15, this is shown as Comparative Example 1-b.

As is clear from FIGS. 13 to 15, according to the present invention, the upper rib 14
Of the first to tenth embodiments, in which the lower ribs 16 extend toward the cylindrical outer peripheral surface 23 of the power steering motor 24 while the lower ribs 16 extend toward the vehicle body side surface 30 of the instrument panel 26. Has a conventional structure different from that of the present invention, wherein a plurality of ribs extend toward the cylindrical outer peripheral surface 23 of the power steering motor 24, and are opposite to the upright side of the plurality of ribs on the substrate. The initial load value (displacement amount is 1) as compared with the shock absorbing structure of Comparative Example 1-a in which the side surface is arranged to face the vehicle body side surface 30 of the instrument panel 26.
(A load value at about 8 to 36 mm).

Further, in particular, the lower rib 16 is
4, the entire rib is partially or entirely thickened, or a discontinuous portion is formed in the upper rib 14, and the height of the upper rib 14 is reduced toward the vehicle body side surface 30. In the first, third, fourth and sixth embodiments, the deformation or breaking strength of the lower rib 16 extending toward the cylindrical outer peripheral surface 23 of the power steering motor 24 is clearly larger than that of the extending upper rib 14. In each of the shock absorbing structures 7, 8, 9, and 10, the height of the upper rib 14 and the height of the lower rib 16 are the same, and
The initial load value is further increased as compared with the shock absorbing structure of Example 2 in which the deformation or the breaking strength of the lower rib 16 and the lower rib 16 are the same.

Further, it has a conventional structure different from that of the present invention, a plurality of ribs extend toward the vehicle body side surface 30 of the instrument panel 26, and a plurality of ribs on the substrate opposite to the side where the plurality of ribs stand. In the shock-absorbing structure of Comparative Example 1-b, whose surface is opposed to the cylindrical outer peripheral surface 23 of the power steering motor 24, a period from the input of the shock until the displacement amount becomes about 24 mm. Is
Although the load value rises at a stretch, the load value suddenly drops when the displacement exceeds 24 mm. It is considered that this phenomenon occurred because the impact absorbing structure moved from between the instrument panel 26 and the power steering motor 24 when the displacement exceeded 24 mm. On the other hand, according to the present invention, according to the first to tenth embodiments, which have a specific structure and are disposed between the instrument panel 26 and the power steering motor 24 in a predetermined state as described above. In the structure, the load value increases almost gradually with an increase in the displacement amount, and no extreme decrease in the load value is observed.

From these results, the shock absorbing structure having a specific structure according to the present invention is disposed in a predetermined state between the instrument panel 26 and the power steering motor 24, and the cylindrical outer peripheral surface is provided. If the shock absorbing structure of the power steering motor 24 having the structure 23 is configured, the initial load value can be effectively secured, and the external shock applied to the cylindrical outer peripheral surface 23 of the power steering motor 24 can be efficiently absorbed. In addition, it is clearly recognized that the shock absorbing structure can be effectively prevented from moving from a predetermined position due to the input of a shock. In particular, an impact in which the lower rib 16 erected on one surface of the substrate 12 has a larger deformation or breaking strength than the upper rib 14 erected on the other surface. The lower rib 1 having a large deformation or breaking strength is formed by using an absorbing structure.
6 is a cylindrical outer peripheral surface 23 of the power steering motor 24
It can be ascertained that by arranging it to extend towards, the initial load value can be increased more advantageously and thus the absorption efficiency of the impact energy can be increased even more effectively.

Although the specific configuration of the present invention has been described in detail above, this is merely an example, and the present invention is not limited by the above description.

For example, in the above embodiment, a projection 18 having an L-shaped cross section is formed integrally with the lower rib 16 of the shock absorbing structure 10, and this projection 18 is attached to the power steering motor 24.
Of the bracket 38, which is a locking member, which is fastened together with the mounting bolt 40. The projection 18 is locked by the locking portion 36. As long as the impact absorbing structure 10 can prevent the sliding movement of the impact absorbing structure 10 with respect to the cylindrical outer peripheral surface 23 of the power steering motor 24, the shape, the formed portion, and the formed number are not limited at all. When a portion other than the protrusion 18 of the shock absorbing structure 10 is locked by the locking portion 36 to prevent the shock absorbing structure 10 from sliding, the protrusion 18 needs to be provided. There is no.

Further, the shape and arrangement of the locking member which locks to the shock absorbing structure to prevent the shock absorbing structure from sliding is not limited to those described in the above embodiment. Rather, it is only necessary that the shock absorbing structure be provided so as to be able to be engaged with the shock absorbing structure in the sliding movement direction of the shock absorbing structure with respect to the curved surface of the vehicle component. It is also possible to directly attach to components and the like arranged in the device.

In addition, in the above embodiment, the present invention is applied to a structure for absorbing an external impact applied to the cylindrical outer peripheral surface of a power steering motor of an automobile. The present invention is applied to a curved surface such as a key cylinder or a lean hose of a column, an automobile part other than a power steering motor having a curved surface such as a curved surface, a cylindrical surface, or a spherical surface, or a part of a vehicle other than an automobile having such a curved surface. Needless to say, the present invention can be advantageously applied to a structure for absorbing an external impact.

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, various changes, modifications, improvements and the like can be performed in embodiments, and unless such embodiments depart from the spirit of the present invention.
Both are included in the scope of the present invention,
Needless to say.

[0054]

As is apparent from the above description, according to the shock absorbing structure for a vehicle part having a curved surface according to the present invention, sliding movement of the shock absorbing structure due to an external impact is advantageously prevented. In addition, a sufficient amount of deformation of the ribs can be ensured, and a reduction in impact energy absorption efficiency due to a reduction in the initial load value can be advantageously prevented. As a result, an external impact applied to the curved surface of the vehicle component Can be sufficiently and efficiently absorbed.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing an example of a shock absorbing structure used in a shock absorbing structure of a vehicle part having a curved surface according to the present invention.

FIG. 2 is an explanatory bottom view of the shock absorbing structure shown in FIG. 1;

FIG. 3 is an explanatory sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a view corresponding to FIG. 3 showing another example of the shock absorbing structure used in the shock absorbing structure of the vehicle component according to the present invention.

FIG. 5 is a view corresponding to FIG. 3 and showing still another example of the shock absorbing structure used in the shock absorbing structure of a vehicle component according to the present invention.

FIG. 6 is an explanatory top view showing another example of the shock absorbing structure used for the shock absorbing structure of the vehicle component according to the present invention.

FIG. 7 is a view showing a state in which the shock absorbing structure shown in FIG. 1 is disposed between a power steering motor having a cylindrical outer peripheral surface and an instrument panel disposed on the vehicle interior side thereof; FIG.

FIG. 8 is an explanatory view showing a deformed state of the shock absorbing structure when an external shock is applied under the arrangement state of the shock absorbing structure shown in FIG. 7;

FIG. 9 is an explanatory bottom view showing one of the shock absorbing structures used in the evaluation test of the shock absorbing structure of the power steering motor having the cylindrical outer peripheral surface.

FIG. 10 is a lower surface (upper surface) explanatory view showing another one of the shock absorbing structures used in the evaluation test of the shock absorbing structure of the power steering motor having the cylindrical outer peripheral surface.

FIG. 11 is an explanatory top view showing yet another shock absorbing structure used in an evaluation test of a shock absorbing structure of a power steering motor having a cylindrical outer peripheral surface.

FIG. 12 is an explanatory top view showing another one of the shock absorbing structures used in the evaluation test of the shock absorbing structure of the power steering motor having the cylindrical outer peripheral surface.

FIG. 13 is a graph showing a relationship between a load value and a displacement amount of some shock absorbing structures used in an evaluation test of a shock absorbing structure of a power steering motor having a cylindrical outer peripheral surface.

FIG. 14 is a graph showing the relationship between the load value and the displacement of several other shock absorbing structures used in an evaluation test of the shock absorbing structure of a power steering motor having a cylindrical outer peripheral surface.

FIG. 15 is a graph showing the relationship between the load value and the displacement of several other shock absorbing structures used in an evaluation test of the shock absorbing structure of a power steering motor having a cylindrical outer peripheral surface.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Shock absorbing structure 12 Substrate 14 Upper rib 16 Lower rib 18 L-shaped projection 23 Cylindrical outer peripheral surface 24 Power steering motor 26 Instrument panel 36 Locking part 38 Bracket

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiro Chikada 3-30 Shimoichiba-cho, Toyota-shi, Aichi Prefecture Inside Kojima Press Kogyo Co., Ltd. (72) Inventor Yamazaki Saki ▼ Yukihiko 1 Toyota-cho, Toyota-shi, Aichi Prefecture Toyota Automobile Co., Ltd.

Claims (3)

[Claims] 1. A structure for absorbing an external impact applied to a curved surface of a vehicle component having a curved surface such as a curved surface, a cylindrical surface, or a spherical surface, wherein both surfaces of a plate-shaped substrate are provided. A plurality of plate-shaped first ribs extending parallel to each other at a predetermined height, and a plate-shaped first rib extending parallel to each other at a predetermined height in a direction perpendicular to the extending direction of the plurality of first ribs. A plurality of the two ribs are crossed with each other or combined so as to form a right-angled corner, and are integrally erected, and a shock absorbing structure made of a synthetic resin material is used. The shock absorbing structure may be configured such that the tips of at least one of the plurality of first ribs and the plurality of second ribs erected on one surface of the substrate are formed with respect to the curved surface of the vehicle component. Touched and young Or arranged so as to be opposed to each other at an interval so that the external impact is transmitted to the curved surface of the vehicle component via the impact absorbing structure, and Shock absorption of a vehicle part having a curved surface, characterized in that a shock from the outside can be absorbed by deformation of a plurality of first and second ribs erected on both surfaces of the substrate, respectively. Construction. 2. The plurality of first and second ribs on one surface of the substrate among the plurality of first and second ribs erected on both surfaces of the substrate as the shock absorbing structure. A rib having a larger deformation or breaking strength than the plurality of first and second ribs on the other surface of the substrate. The tip of at least one of the plurality of first and second ribs on one surface is arranged in a state of being brought into contact with the curved surface of the vehicle component or being opposed at an interval. The impact absorbing structure for a vehicle component having a curved surface according to claim 1. 3. A locking member capable of locking to the shock absorbing structure in a sliding movement direction of the shock absorbing structure with respect to a curved surface of the vehicle component is provided in a fixed position, and the sliding movement direction of the shock absorbing structure is provided. The impact absorbing structure for a vehicle part having a curved surface according to claim 1 or 2, wherein the impact absorbing structure is configured to prevent movement of the vehicle part.