JP3539049B2 - Member connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a joining structure for joining two members.

[0002]

2. Description of the Related Art In a case where two members crossing each other vertically are connected via an intermediate bonding material, a groove is generally formed on the member to be connected, and a projection is formed on the intermediate bonding material. In this structure, two members are joined by fitting a projection to the joint (see Japanese Patent Application Laid-Open No. 6-286543 as a similar technique).

[0003]

However, according to such a conventional technique, the joint structure utilizing the fitting of the groove and the projection causes the axial crushing force to be applied to one of the members. A stable crush mode of the member may be hindered by the fitting portion between the groove and the projection. That is, when an axial crushing force is applied to one end of the member, the ideal crushing mode in which the energy of the axial crushing force is most effectively absorbed is that the member deforms into a bellows shape in which regular irregularities are repeated. However, this ideal deformation may be hindered by the fitting portion between the groove and the projection as described above.

[0004] Therefore, it is desired to propose a coupling structure of members that can obtain an ideal crushing mode when an axial crushing force is applied. In recent years, an extruded material such as an aluminum light alloy is often used as an intermediate bonding material for weight reduction. Therefore, even when such an extruded material is used, an ideal crushing mode is obtained. A proposal is desired.

The present invention has been made by paying attention to such prior art, and provides a joining structure of members that can obtain an ideal crushing mode even when an extruded material is used as an intermediate joining material. It is.

[0006]

According to the first aspect of the present invention,
In a joining structure of a first member that receives an axial crushing force, a second member that vertically intersects the first member, and a member that includes an extruded material that joins opposing surfaces of the first member and the second member , The two extruded members are parallel to each other in a direction perpendicular to the axial direction of the first member.
And the upper and lower ends of the two vertical surfaces
And upper and lower lateral surfaces for coupling and coupling.
It is shifted from the upper end of the vertical surface portion to the second member side and
That the lateral surface and the first member are separated from each other
A space is provided between the lateral surface portion and the first member.
And when the first member is axially crushed,
Depressed portions, thin-walled portions, hollows corresponding to convex or concave portions generated on the surface
Part or hole is formed in the upper side surface part.
And an axial crushing force is applied to the first member so that the first member
When the member is axially crushed, the concave portion, thin portion, hollow portion, hole
The extruded material is deformed and crushed by any action of the part
As described above, the vertical surface portion is applied to a portion of the first member that is axially crushed.
By coupling, the axial crush mode of the first member is controlled.
The first member is connected to the second member
A coupling structure of members coupled via the pushing member;
It is characterized by having done. Here, the term "intersect" includes both a case of crossing at a right angle (a cross shape, a T shape, etc.) and a case of crossing diagonally (an X shape, a Y shape, etc.). Also,
The first member and the second member may be “extruded materials”.

According to the first aspect of the present invention, since the extrusion direction of the extruded material is orthogonal to the axial direction of the first member, the extruded material is easily crushed in the axial direction of the first member.
The original ideal crush mode of the member is obtained. Also, beside
A convex portion or a concave portion at the time of crush on the surface facing the first member
The concave, convex, thin-walled, hollow, and hole parts corresponding to
As a result, the lateral portion is easily crushed in the axial direction of the first member.
In addition, the original ideal crush mode of the first member is obtained.

[0008] According to a second aspect of the present invention, the extruded material is connected to an intermediate point of uneven deformation when the opposing surface of the first member is crushed.

According to the second aspect of the present invention, since the extruded material is connected to the midpoint of the uneven deformation when the opposing surface of the first member is crushed, the original material of the first member is extruded by the extruded material. Crush mode is not disturbed.

According to a third aspect of the present invention, the extruded material has an X-shaped rib, and a groove is formed at an intersection of the rib.

According to the third aspect of the present invention, the rib is the first rib.
The member is easily crushed in the axial direction, and the original ideal crush mode of the first member is obtained.

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In addition, the same reference numerals are given to common portions in each embodiment, and overlapping description will be omitted.

FIG. 1 to FIG. 6 are views showing a first embodiment of the present invention. A is a first member, B is a second member, and both have a cylindrical shape with a rectangular cross section. The first member A is used, for example, as a “side member” disposed along the front-rear direction of the body of the automobile, and is a member to which the axial crushing force is easily applied. The second member B is used, for example, as a “cross member” arranged along the vehicle width direction.

The first member A and the second member B are vertically orthogonal (intersect at right angles), and the lower surface 1 as an “opposing surface” at the end of the first member A, The upper surface 2 as an “opposing surface” at the end of the two members B is joined by an extruded material 3 as an intermediate joining material.

The extruded member 3 is made of an aluminum light alloy and has the same cross-sectional shape in the extruding direction (the direction indicated by the arrow α in FIG. 1). The extruded material 3 is provided in a state in which the extrusion direction α is orthogonal to the axial direction of the first member A (the β direction indicated by an arrow in FIG. 1).

This extruded material 3 is composed of two parallel vertical surface portions 4,
5 and one slope portion 6 whose upper side is widened. The slope portion 6 is joined to a position where the lower end 5b of one of the vertical surface portions 5 is slightly left. The connecting point between one vertical surface portion 5 and the inclined surface portion 6 and the other vertical surface portion 4 are connected by a horizontal surface portion 7. In addition, each upper end 4 of the vertical surface portions 4 and 5 and the slope portion 6
The lateral surface portion 8 is also formed at a position where a, 5a, and 6a are slightly left. Three arc-shaped concave portions 9 are formed in the upper side surface portion 8.

By forming the upper and lower lateral surfaces 7, 8, a closed section is formed between the lateral surfaces 7, 8. An X-shaped rib 10 is formed in a rectangular closed cross section formed between the vertical portions 4 and 5. At the intersection 11 of the rib 10, a groove 1 along the extrusion direction α
2 are formed (see FIGS. 5 and 6).

Next, the first member A and the second member A
A method of coupling to the member B will be described. First, the second member B is placed between the lower ends 4b and 5b.
The upper surface 2 of the second member B is joined to the lower lateral surface portion 7 of the extruded material 3 with the.

On the lower surface 1 of the first member A, upper ends 4a, 5a, 6a of the vertical surfaces 4, 5 of the extruded material 3 and the inclined surface 6 are connected. Here, what is important is that each upper end 4a, 5a, 6a
Is connected to the intermediate points b, g, and i of the intermediate points a to i of the concave-convex deformation when the lower surface 1 of the first member A is crushed.

That is, as shown in FIG. 4, when an axial crushing force F along the axial direction β is applied to the end of the first member A,
The end of the first member A is originally composed of a convex portion 13 and a concave portion 14.
This causes bellows deformation that repeats regularly. FIG.
Is an illustration of a state where the first member A is actually compressed along the axial direction β, which is extended for easy understanding.

As described above, it is most ideal that the end of the first member A is crushed like a bellows in terms of efficiently absorbing the energy of the axial crushing force F. If no element that hinders bellows deformation is added to the first member A, the first member A will exhibit this ideal crush mode.

In the ideal crush mode, the first member A
In the end portion, the convex portions 13 and the concave portions 14 are repeated at predetermined intervals L according to the shape and strength of the first member A.
The vertices of the convex portions 13 and the concave portions 14 are largely displaced outward or inward from the positions before the deformation, but the intermediate points a to i are not displaced before and after the deformation. Each upper end 4a, 5a, 6a of the extruded material 3 is connected to an intermediate point b, g, i selected from the non-displaced intermediate points a to i (other than the intermediate points b, g, i). "Middle point"
May be combined).

Further, the arc-shaped concave portion 9 formed on the lateral surface portion 8 of the extruded material 3 is formed at a position corresponding to the convex portion 13 when the first member A is crushed.

Next, the action of the extruded material 3 on the first member A when the axial crushing force F is applied to the first member A will be described. The description will be made separately for each characteristic configuration of the extruded material 3.

[0031]Direction of the extruded material 3 with respect to the first member A (FIG.
1, see FIG. 4):An axial crushing force F is applied to the end of the first member A.
In this case, the end of the first member A is
Try to deform into bellows shape by repeating
3 is perpendicular to the axial direction β of the first member A.
The extruded material 3 is in the axial direction β of the first member A.
The extruded material 3 is easily crushed, and the ideal crushing of the first member A
Do not disturb mode.

That is, if the extrusion direction α of the extruded material 3 is matched with the axial direction β of the first member A, the vertical portions 4, 5 and the inclined portion 6 of the extruded material 3 are in a state along the axial direction β. ,
An axial crushing force F is received in the planes of the vertical surfaces 4 and 5 and the slope 6. Therefore, the extruded material 3 is hard to be crushed, and the ideal crush mode of the first member A as described above is hindered. In particular, in this embodiment, the X-shaped rib 10 is also formed in the extruded material 3, and the rib 10 suppresses the out-of-plane deformation of the vertical surfaces 4, 5, so that the extruded material 3 is harder to be crushed. As a result, the first member A cannot maintain the ideal crush mode in which the convex portions 13 and the concave portions 14 are repeated. In the present embodiment, in order to avoid such a state, the extrusion direction α of the extruded material 3 is orthogonal to the axial direction β of the first member A.

Position of the joining point of the extruded material 3 with respect to the first member A
Placement (see FIG. 4): upper end 4a, 5a, 6a of extruded material 3
Is connected to the intermediate points b, g, and i where the first member A is not displaced even when the first member A is crushed, so that the ideal crush mode of the first member A is hindered by the connection with the extruded material 3. There is no. If each of the upper ends 4a, 5a, 6a is
When coupled to the vertices of the convex portion 13 and the concave portion 14 on the lower surface 1 of the member A, the convex portion 13
Or the top of the concave portion 14 is pushed or pulled, so that it is no longer possible to exhibit ideal irregularity deformation.

[0034]Concave portion 9 formed in lateral portion 8 of extruded material 3
(See Figure 4):The lateral surface portion 8 of the extruded material 3 is such that the extruded material 3 is
When the member A is deformed along the axial direction β, a reaction force is generated.
The protrusions 13 of the first member A are
Is formed, the lateral surface portion 8 is formed by the first portion.
The material A is easily crushed along the axial direction β. And this second
The projection 13 of one member A and the depression 9 of the lateral surface 8 correspond to each other.
Since the protruding portion 13 can enter the recess 9 at the time of crushing,
The distance D (see FIG. 3) between the lower surface 1 and the lateral surface 8 is small.
Also, the two members do not interfere with each other, and the original
An imaginary crush mode can be obtained.

Formed at the intersection 11 of the X-shaped rib 10 of the extruded material 3
Groove 12 (see FIGS. 5 and 6): Since the groove 12 was formed at the intersection 11 of the X-shaped rib 10 in the extruded material 3, the rib 10
Are easily crushed in the axial direction β of the first member A. Therefore, the extruded material 3
The whole is easily crushed in the axial direction β of the first member A, and the original ideal crushing mode of the first member A is not hindered. Note that the groove 10 may be formed above and below the intersection 11.

FIGS. 7 and 8 show a second embodiment. In the extruded material 15 of this embodiment, the X-shaped rib of the previous embodiment is abolished, and instead, a vertical surface portion 16 and a horizontal surface portion 17 are added one by one.

Then, the upper end 1 of the added vertical surface portion 16
6a was also connected to the intermediate point d of the first member A. Therefore, the vertical portion 16 does not disturb the ideal crushing mode of the first member A.

Further, a thin portion 8a having a reduced thickness is formed on the upper lateral surface portion 8 at a position corresponding to the convex portion 13 (see FIG. 4, the same applies hereinafter) when the first member A is crushed. I have. By forming the thin portion 8a, the lateral surface portion 8 is easily crushed along the axial direction β of the first member A. As a result, the entire extruded material 15 is easily crushed, and the original ideal crushing of the first member A is achieved. Mode does not interfere.

FIG. 9 is a diagram showing a third embodiment. In the extruded material 18 according to this embodiment, a hollow portion 8b is formed instead of the thin portion of the second embodiment. By forming such a hollow portion 8b, the lateral surface portion 8 is easily crushed.
It should be noted that it is easy to form the lateral surface portion 8 into such a complicated shape by extrusion molding.

FIGS. 10 and 11 are views showing a fourth embodiment. In the extruded material 19 according to this embodiment, the holes 8c are formed in all of the three lateral surface portions 7, 8, and 17. The holes 8c are formed at positions corresponding to the protrusions 13 when the first member A is crushed.
7 is promoted in the axial direction β. The hole 8c is formed after extrusion molding.

FIG. 12 is a view showing a fifth embodiment.
In the extruded material 20 according to this embodiment, three lateral surface portions 7,
The projections 21 and the depressions 22 were continuously formed on the upper two lateral surface portions 8 and 17 out of 8 and 17. The protruding portions 21 of the lateral surface portions 8 and 17 are provided with the concave portions 14 (FIG. 4) when the first member A is crushed.
The concave portions 22 of the lateral surface portions 8 and 17 correspond to the convex portions 13 when the first member A is crushed. On the lower lateral surface portion 7, only the convex portions 23 corresponding to the concave portions 14 of the first member A are formed. By doing so, the collapse of each of the lateral surface portions 7, 8, 17 in the axial direction β is further promoted, and the original ideal collapse mode of the first member A can be realized.

[0042]

According to the first aspect of the present invention, since the extrusion direction of the extruded material is orthogonal to the axial direction of the first member, the extruded material is easily crushed in the axial direction of the first member. 1
The original ideal crush mode of the member is obtained. Also, beside
A convex portion or a concave portion at the time of crush on the surface facing the first member
Corresponding to the concave, convex, thin-walled, hollow,
Since either of them is formed, the lateral surface portion extends in the axial direction of the first member.
Easily collapsed and the original ideal crush mode of the first member
Is obtained.

According to the second aspect of the present invention, since the extruded material is connected to the intermediate point of the uneven deformation when the opposing surface of the first member is crushed, the original ideal material of the first member is extruded by the extruded material. Crush mode is not disturbed.

According to the third aspect of the present invention, the rib is the first type.
The member is easily crushed in the axial direction, and the original ideal crush mode of the first member is obtained.

[0045]

[0046]

[0047]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a connecting structure of members according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an extruded material of the first embodiment.

FIG. 3 is a side view as viewed from a direction indicated by an arrow DA in FIG. 1;

FIG. 4 is a side view corresponding to FIG. 3 showing a crush mode when an axial crush force is applied to a first member.

FIG. 5 is an enlarged sectional view showing an intersection of X-shaped ribs.

FIG. 6 is an enlarged cross-sectional view showing a state where an intersection of X-shaped ribs is deformed.

FIG. 7 is a side view showing a member coupling structure according to a second embodiment.

FIG. 8 is an enlarged cross-sectional view showing a lateral surface portion of the second embodiment.

FIG. 9 is an enlarged sectional view showing a lateral surface portion of the third embodiment.

FIG. 10 is an enlarged sectional view showing a lateral surface portion of the fourth embodiment.

FIG. 11 is a perspective view showing an extruded material according to a fourth embodiment.

FIG. 12 is a side view showing a member coupling structure according to a fifth embodiment.

[Explanation of symbols]

1 Lower surface of first member (opposing surface) 2 Upper surface of second member (opposing surface) 3 Extruded material 7, 8, 17 side surface 8a Thin part 8b hollow part 8c hole 9, 22 Side recess 10 ribs 11 intersection 12 groove 13 Projection of the first member 14 Recess of the first member 23 Convex part of the lateral part A First member B Second member α Extrusion direction β axis direction a-i midpoint F shaft crushing force

Continuation of the front page (56) References JP-A-7-117710 (JP, A) JP-A-6-336180 (JP, A) JP-A-5-330450 (JP, A) JP-A-9-207813 (JP) JP-A-7-186951 (JP, A) JP-A-6-329050 (JP, A) JP-A-4-138974 (JP, A) JP-A-8-207825 (JP, A) 9-183388 (JP, A) Japanese Utility Model 6-27442 (JP, U) Japanese Utility Model 4-67577 (JP, U) Japanese Utility Model 3-47656 (JP, U) Japanese Utility Model 63-129676 (JP, U.S.A.) U) Japanese Utility Model Application No. Sho 59-186180 (JP, U) U.S. Pat. No. 5,462,144 (US, A) German Patent Application Publication No. 4204826 (DE, A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 21/15 B62D 21/02 B62D 25/08 B62D 25/20 F16B 7/00-7/22

Claims (3)

(57) [Claims] 1. A shaft and first member for receiving a crushing force, and a second member which intersects with the vertical with the first member, an extruded material which binds the opposing faces of the first member and the second member
In the joining structure of members, the extrusion direction of the extruded material is orthogonal to the axial direction of the first member , and the extruded material is formed of two parallel vertical surface portions and two vertical surface portions. Up
Upper and lower lateral surfaces connecting the ends and the lower ends respectively
Part, wherein the upper side surface portion is the second member from the upper end of the vertical surface portion.
Side so that the lateral surface and the first member are separated from each other.
The lateral surface portion and the first member
A space is provided between the first member and the lower surface of the first member when the first member is axially crushed.
A concave part, a thin part, a hollow part,
When any of the holes is formed in the upper side surface portion
In both cases, an axial crushing force is applied to the first member, and the first member is subjected to an axial pressure.
When breaking, any of the concave, thin, hollow, and hole parts
So that the extruded material is deformed and crushed by the action
Joining the vertical surface to the axially crushed portion of the first member;
With this, the axial crush mode of the first member is ideally set.
The first member is connected to the second member by the pushing portion.
A member joining structure , wherein the members are joined via a material . 2. The extruded material is coupled to an intermediate point of uneven deformation when the opposing surface of the first member is crushed.
A joining structure of the member described in the above. 3. The member connecting structure according to claim 1, wherein the extruded member has an X-shaped rib, and a groove is formed at an intersection of the rib.