JP3393980B2 - Bracket 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 bracket structure which is light in weight and low in cost.

[0002]

2. Description of the Related Art A bracket shown in FIGS. 11 and 12 is known as a bracket for mounting a leaf spring on a chassis frame of an automobile. As shown in the figure, the bracket a is composed of a main body b formed in a U-shaped cross section, an inner reinforcing material c attached inside the main body b, and an outer reinforcing material d attached outside. In the bracket a, the main body b and the outer reinforcing material d are welded to the side member e of the chassis frame, and the mounting hole f of the main body b is attached.
A leaf spring end (not shown) is attached.

Since the end portion of the leaf spring is fixed to the mounting hole f of the main body b with a relatively strong tightening force, it is necessary to maintain local strength at that portion, and a thick plate material is used. It is molded. When the main body b having a large plate thickness is welded to the side member e as described above, the outer reinforcing member d has stress concentration at the welded portion g due to the difference in plate thickness from the member e. It is formed from a material that is thinner than the body b. The inner reinforcing material c plays a role as a reinforcing member when the rigidity due to the input from the attachment hole f of the leaf spring cannot be secured only by the main body b.

[0004]

By the way, since the bracket a is constructed by welding the main body b, the inner reinforcing material c and the outer reinforcing material d, each part (main body b, inner reinforcing material c, It is necessary to prepare a molding die for each outer reinforcing material d), which increases the manufacturing cost. Further, since the parts have different plate thicknesses, it is necessary to arrange materials having different plate thicknesses, which makes inventory management difficult. Further, when welding the respective parts, the accuracy tends to deteriorate and the weight also increases.

An object of the present invention, which was devised in view of the above circumstances, is to provide a bracket structure which is light in weight and low in cost.

[0006]

In order to achieve the above object, the bracket structure according to the present invention has a structure in which one plate-shaped material 4 is folded.
By folding, the two overlapping parts 14 of the material 4 are opposed to each other.
And connect through the single part 15 and open two sides
Formed into a substantially box body 27, and the above-mentioned overlapping portion 14 is assembled into the component 3
And at least the above two open faces.
It has a bracket structure where one side is attached to the main body 2.
Line Y, which is a plate-shaped material 4 that is valley-folded approximately 90 degrees
Two rectangular parts 5 and 6 connected via 1 and one of them
Lines X, which are mountain-folded on the left and right sides of the rectangular part 5, respectively
Triangular parts 7 and 8 connected through 1 and the triangular parts
It is connected to line 7 and 8 through line Y2 that is valley-folded approximately 180 degrees.
And the other rectangular portion 6 is valley-folded by approximately 90 degrees.
Other triangular parts 9 and 10 connected via a line Y3
, It is formed into a substantially triangular shape in a plan view, and the substantially triangular plate shape
Fold material 4 along each valley fold line Y and mountain fold line X
Therefore, the triangular portions 7 and 8 and the other triangular portions 9 and 10 are
Are overlapped with each other to form two overlapped portions 14 facing each other.
The rectangular part 5 on one side is connected to the overlapping parts 14 with each other.
Above the above-mentioned one and the other rectangular portions 5 and 6
Is a substantially box-shaped body 27 with open
The upper part of at least one of 6 is a mounting part to the main body 2, and
The overlapping portion 14 is used as a mounting portion for the component 3 . In addition, by folding one plate-shaped material 33,
33 overlapping portions 42 of 33 are opposed to each other through a single portion 43
Connected to the box body 46 with two open sides
When molded, the overlapping portion 42 is used as a mounting portion for the component 32.
In addition, at least one of the two open surfaces described above is attached to the main body 31.
It is a bracket structure used as a mounting part of
The material 33 is connected through a line that is valley-folded at about 90 degrees.
Two rectangular parts 34, 35 and one rectangular part 3
Connected to the left and right sides of 5 through line X that is folded around 90 degrees
Triangular portion 36 and a valley of approximately 180 degrees in the triangular portion 36.
It is connected through the folded line Y1 and the other of the above
It contacts the rectangular part 34 through a line Y2 that is valley-folded by approximately 90 degrees.
Formed from the continuous trapezoidal portion 37 into a substantially rectangular shape in plan view
Then, the plate-shaped material 33 having a substantially quadrangular shape is attached to each valley fold line Y and
By folding at the mountain folding line X, the triangular portion 36
And the trapezoidal part 37 are overlapped and the two overlapping parts 4 are opposed to each other.
2 and the rectangular portion 35 on one side is the same as the overlapping portion 42.
A single unit 35 for connecting a sword, and one of the above and the other
A substantially box body 46 in which the upper portions of the shape portions 34 and 35 are opened;
The upper part of at least one of the rectangular parts 34, 35.
The overlapping portion 42 of the component 32 is used as a mounting portion to the main body 31.
It is used as a mounting part.

According to the above invention, one plate-shaped material is folded.
Since it is folded up into a bracket structure, only one type
Not only can we manufacture from raw materials and promote cost reduction,
As in the past, the deterioration of accuracy that occurs when welding each part
Absent. In addition, the general shape is a box with two sides open.
Since it has been made into a shape, without the inner reinforcement member that was conventionally required
Also, the required rigidity can be secured. In addition, the above-mentioned overlapping part
Since it is used as a mounting part, two parts are required for strength.
As it is piled up and other parts become one material, request
The plate thickness distribution is appropriate according to the strength. Therefore, the plate of material
The thickness can be reduced, and the weight and cost can be reduced. Well
In addition, a box with two open sides formed by folding the material
At least one of the two open sides of the box body to the main body
The bracket attached to the main unit
Since the unit has a substantially box structure, its rigidity is improved.
It As a result, the thickness of the material can be made thinner, and the weight and weight can be reduced.
Further cost reduction can be promoted.

[0008]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a developed view of a bracket 1 according to this embodiment, and FIGS. 2 and 3 are perspective views of the bracket 1 manufactured by folding the bracket 1. This bracket 1
Is welded to the side member 2 of the chassis frame of the automobile as shown in FIGS. 4 and 5, and the end of the leaf spring 3 is attached as shown in FIG.

As shown in FIG. 1, the bracket 1 is
It is made of a plate-shaped material 4 having a uniform thickness. Material 4 is
It is obtained by punching out a general steel plate. The material 4 is
Since the general shape is a substantially triangular shape in a plan view, when punching out from a steel plate, if the chips are turned upside down so as to be adjacent to each other, wasteful punching waste is reduced.

As shown in FIG. 1, the material 4 includes a large rectangular portion 5, a small rectangular portion 6, left and right small triangular portions 7 and 8, left and right large triangular portions 9 and 10, and a modified hexagonal portion 11. Each of them is integrally connected via a mountain fold line X (broken line) and a valley fold line Y (dotted line). Then, when the material 4 is folded along the mountain fold line X and the valley fold line Y, the bracket 1 shown in FIGS. 2 and 3 is manufactured.

More specifically, the large rectangular portion 5 has a valley fold line Y.
The small rectangular portion 6 is connected via 1 and the small triangular portions 7 and 8 are connected to the left and right of the large rectangular portion 5 via the mountain fold lines X1 and X1, respectively. Large triangular portions 9 and 10 are connected to the small triangular portions 7 and 8 and the small rectangular portion 6 via valley fold lines Y2 and Y3, respectively. Then, the large hexagonal portion 9 is provided with the deformed hexagonal portion 1 through the valley fold line Y4.
1 is connected.

The outer edges 7a, 8a of the small triangular portions 7, 8 and the outer edges 9a, 10a of the large triangular portions 9, 10 are valley fold lines Y.
It is formed symmetrically with respect to 2 and Y2 so that it is exactly overlapped when the material 4 is folded along the valley fold lines Y2 and Y2. Further, the small triangular portions 7 and 8 and the large triangular portions 9 and 10 are formed with mounting holes 12 and 13 to which the above-described components shown in FIG. 6 (end portions of the leaf spring 3) are mounted. , 13 are also arranged symmetrically with respect to the valley fold line Y2 so that they are exactly overlapped when the material 4 is folded along the valley fold line Y2.

The small triangular portions 7 and 8 and the large triangular portion 9,
The overlapping portion with 10 becomes the overlapping portion 14 as shown in FIGS. 2 and 3. These two overlapping portions 14 are arranged in parallel so as to face each other on the left and right, and the left and right holes 12 and 13 are also arranged coaxially. Then, the large rectangular portion 5 connecting the overlapping portions 14, 14 becomes a single portion 15 as shown in FIGS. 2 and 3. Further, as shown in FIGS. 2 and 3, the portions 16, 16 of the large triangular portions 9, 10 that do not overlap the small triangular portions 7, 8; the small rectangular portion 6, the large rectangular portion 5 and the modified hexagonal portion 2 Box body 2 with open surface
Molded to 7.

As shown in FIG. 1, the modified hexagonal portion 11
Is provided with a portion 17 defined by a mountain fold line X2 and a valley fold line Y5 into a shape in which triangles are adjacent to each other at their bottom sides. When this portion 17 is bent along each of the lines X2 and Y5, the deflection 1 is bent as shown in FIGS.
It becomes 8. When the bracket 1 is welded to the side member 2 as shown in FIGS. 4 and 5, the deflection 18 exerts a stiffening effect to enhance its mounting rigidity.

Further, as shown in FIG. 1, a large triangular portion 10
Similarly, a portion 19 having a shape in which triangles are connected at the bottom sides from the mountain fold line X3 and the valley fold line Y6 is also provided, and this portion 19 is provided with the deflection 20 as shown in FIGS. Make up. Further, the space between the mountain fold line X4 and the valley fold line Y7 is, as shown in FIGS.
Thus, the space between the valley fold line Y7 and the edge portion 22 becomes the flange portion 23 for the positioning portion. Further, a portion between the mountain fold line X4 of the small rectangle 6 and the edge portion 24 becomes a shelf portion 25 as shown in FIGS. 2 and 3.

The operation of this embodiment having the above configuration will be described.

The material 4 shown in FIG.
The bracket 1 shown in FIGS. 2 and 3 is manufactured by folding along the (broken line) and the valley fold line Y (dashed line). In addition, in order to prevent springback after bending, the bent portion 2
Fillet welding may be applied to 6 and the like. Specifically, the valley fold line Y2 is bent 180 degrees, and the valley fold lines Y1 and Y3 are 9 degrees.
It is bent 0 degrees, the mountain fold line X1 is bent 90 degrees, and the other valley fold lines Y and mountain fold lines X are each bent at a predetermined angle.

As described above, since the plate-shaped material 4 is folded to form the bracket 1, the material 4 having only one plate thickness is used.
Therefore, the bracket 1 can be manufactured, and cost reduction can be promoted.
Further, unlike the conventional type shown in FIG. 11 and FIG. 12, there is no deterioration in accuracy that occurs during welding of each component. Further, since the overall shape is a substantially box body 27 having two open sides, the inner reinforcing member c shown in FIG.
Even without it, the required rigidity can be secured. That is, the small rectangular portion 6 and the large rectangular portion 5 of this embodiment correspond to the inner reinforcing member c of the conventional example shown in FIG.
And the deflection 18 corresponds to the outer reinforcing member d of the conventional example shown in FIG.

Further, as shown in FIGS. 5 and 6, since the overlapping portions 14 and 14 are used as the mounting portions of the end portions of the leaf spring 3 (corresponding to the parts in the claims), portions requiring strength are required. Is made up of two sheets of material and the other portion is made of one material, and the plate thickness of each part of the entire bracket 1 has an appropriate plate thickness distribution according to the required strength. Therefore,
The plate thickness of the material 4 can be reduced, and the weight and cost can be reduced.

In addition, the box body 27 is opened 2
Since one of the surfaces (the surface between the deflections 18 and 20) is used as a mounting portion for the side member 2 (corresponding to the main body of the claims), the bracket 1 mounted on the side member 2 is shown in FIG. Further, as shown in FIG. 5, it has a substantially box structure, and its rigidity is greatly improved. That is, when the bracket 1 is attached to the side member 2, the outer surface of the member 2, the large rectangular portion 5, the small rectangular portion 6, and the large trigonal portions 9 and 10 have only the opposing surface of the small rectangular portion 6. The open box structure greatly improves the rigidity. As a result, the plate thickness of the material 4 can be made thinner, and the weight reduction and the cost reduction can be further promoted.

Next, modifications of the present invention are shown in FIGS.

FIG. 7 is a developed view of the bracket according to this embodiment, and FIG. 8 is a perspective view of the bracket 30 manufactured by folding the bracket. This bracket 30 is shown in FIG.
As shown in, a rod 32 which is welded to an axle case 31 of the automobile and constitutes a suspension is attached.

As shown in FIG. 7, this bracket 30
Is made of a plate-shaped material 33 obtained by punching a general steel plate as in the previous embodiment. The material 33
Since its general shape is a substantially quadrangular shape in a plan view, wasteful punching scraps can be reduced by adjoining each other when punching from a steel plate.

In the material 33, as shown in FIG. 7, a large rectangular portion 34, a small rectangular portion 35, left and right triangular portions 36, 36 and left and right trapezoidal portions 37, 37 are respectively mountain fold lines X (broken lines). And a valley fold line Y (dashed-dotted line) to be integrally connected. Then, when the material 4 is folded along the mountain fold line X and the valley fold line Y, the bracket 30 shown in FIG. 8 is manufactured.

More specifically, the outer edge 38 of the triangular portion 36 and the outer edge 39 of the trapezoidal portion 37 are formed symmetrically with respect to the valley fold line Y1 and are exactly overlapped when the material 33 is folded along the valley fold line Y1. It is like this. Further, the triangular portion 36 and the trapezoidal portion 37 are formed with mounting holes 40 and 41 for mounting the rod 32 shown in FIG. 9, and these holes 40 and 41 are also arranged symmetrically with respect to the valley fold line Y1. When the material 33 is folded along the valley fold line Y1, the material 33 and the material 33 are exactly overlapped with each other.

The overlapping portion of the triangular portion 36 and the trapezoidal portion 37 becomes the overlapping portion 42 as shown in FIG. Two overlapping portions 42, 42 are arranged in parallel so as to face each other, and the holes 40, 41 are also arranged coaxially. Then, a small rectangular portion 35 connecting between the overlapping portions 42, 42.
Becomes a single part 43. Also, the triangular portion 3 of the trapezoidal portion 37
As shown in FIG. 8, a substantially box body 46 having two open sides is formed by the portion 44 not overlapping 6 and the large rectangular portion 34 and the small rectangular portion 35.

Further, on the outer edge of the trapezoidal portion 37, a mounting portion 45 formed in an arc shape according to the outer shape of the axle case 31 is formed.
Is provided.

The operation of this embodiment having the above configuration will be described.

The material 33 shown in FIG.
The bracket 30 shown in FIG. 8 is manufactured by folding along the (broken line) and the valley fold line Y (dashed line). The bent portion 47 may be fillet welded to prevent springback after bending. Specifically, the valley fold line Y1 is 180
Bent, the valley fold line Y2 is bent 90 degrees,
The mountain fold line X is bent 90 degrees.

As described above, since the plate-shaped material 33 is folded to form the bracket 30, the bracket 30 can be manufactured from the material 33 having only one kind of plate thickness, and the cost reduction can be promoted. In addition, since it is a one-piece product, there is no deterioration in accuracy that occurs when welding each part. Furthermore, since the overall shape is a substantially box body 46 having two open surfaces, the required rigidity can be ensured without the conventionally required inner reinforcing member h as shown in FIG. That is, the small rectangular portion 35 of the present embodiment corresponds to the inner reinforcing member h of the conventional example shown in FIG. The conventional bracket i shown in FIG. 10 was constructed by welding an inner reinforcing member h to a main body j having a U-shaped cross section.

Further, as shown in FIG.
Since the suspension rods 32 and 42 are attached to the suspension rod 32, the portion requiring strength is formed by stacking two sheets of material, and the other portion is formed of one sheet of material, and the plate thickness of each portion of the entire bracket 30 depends on the required strength. It has an appropriate thickness distribution. Therefore, the plate thickness of the material 33 can be reduced, and the weight reduction and the cost reduction can be achieved.

In addition, the opened box body 46
Since one surface (the surface of the mounting portions 45, 45) is a mounting portion to the axle case 31, the axle case 31
The bracket 30 attached to has a substantially box structure as shown in FIG. 9, and its rigidity is improved. That is,
When the bracket 30 is attached to the axle case 31, a box structure having an outer surface of the case 31, a large rectangular portion 34, a small rectangular portion 35, and a trapezoidal portion 37, in which only the facing surface of the large rectangular portion 34 is opened. Therefore, the rigidity is improved. As a result, the plate thickness of the material 33 can be made thinner, and further weight reduction and cost reduction can be promoted.

[0034]

As described above, according to the bracket structure of the present invention, the following effects can be exhibited.

(1) Since the plate material of the bracket can be thin, the weight and cost can be reduced.

(2) Since the reinforcing member which is conventionally required as a separate component is not required, not only the cost can be reduced, but also the deterioration of accuracy due to welding of each member can be prevented.

[Brief description of drawings]

FIG. 1 is a development view of a material of a bracket structure showing an embodiment of the present invention.

FIG. 2 is a perspective view of a bracket structure manufactured by folding the material.

FIG. 3 is a perspective view of the bracket structure seen from the opposite side.

FIG. 4 is a perspective view showing a state in which the bracket structure is attached to a side member.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a side view showing the entire side member.

FIG. 7 is a development view of a material of a bracket structure showing another embodiment of the present invention.

FIG. 8 is a perspective view of a bracket structure manufactured by folding the material.

FIG. 9 is a perspective view showing a state in which the bracket structure is attached to an axle case.

FIG. 10 is a perspective view showing a conventional bracket structure.

FIG. 11 is a perspective view showing another conventional bracket structure.

FIG. 12 is a cross-sectional view showing a state where the bracket structure is attached to a side member.

[Explanation of symbols]

1 bracket 2 Side members as the body Leaf spring as 3 parts 4 material 14 Overlap 15 Single Part 27 box bodies

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-11110 (JP, A) JP-A-6-107237 (JP, A) Fukuihei 6-12117 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B62D 21/00 B60G 11/10

Claims (2)

(57) [Claims] 1. By folding a single plate-shaped material 4.
The two overlapping parts 14 of the material 4 face each other to form the single part 15
A box body that is connected through
27, and the overlapping portion 14 is used as a mounting portion for the component 3.
At the same time, at least one of the two open surfaces is used as the main body 2
It has a bracket structure that attaches to the
Material 4 is connected through a line Y1 that is valley-folded at about 90 degrees
Two rectangular parts 5 and 6 and one rectangular part 5
Connected via a line X1 that is mountain-folded to the left and right of each
The triangular portions 7 and 8 and approximately 180
In addition to being connected via the line Y2 that is folded over
Via a line Y3 that is valley-folded approximately 90 degrees on one rectangular portion 6
From the other connected triangular portions 9 and 10, a substantially triangular shape in plan view
Formed into a shape, and fold the substantially triangular plate-shaped material 4 into valleys.
By folding along line Y and mountain fold line X, the above triangle
Formed parts 7 and 8 and other triangular parts 9 and 10 are overlapped and paired.
The two overlapping portions 14 facing each other, and the rectangular portion 5 on one side
A single portion 15 for connecting the overlapping portions 14 to each other is provided.
The upper and lower sides of the one and the other rectangular portions 5 and 6 are substantially open.
At least one of the rectangular portions 5 and 6 described above.
The upper part of one side is a mounting part to the main body 2, and the overlapping part 14 is a part.
A bracket structure characterized by being used as a mounting portion for the product 3 . 2. Folding a single plate-shaped material 33
So that the two overlapping portions 42 of the material 33 face each other and the single portion 4
A box that is connected through 3 and has two open sides
Molded into a sleeve body 46, and the overlapping portion 42 is attached to the mounting portion of the component 32.
And at least one of the two open surfaces
It has a bracket structure as a mounting portion to the main body 31,
The plate-shaped material 33 is put through a line that is valley-folded at about 90 degrees.
Two rectangular parts 34, 35 connected together and one of them
Draw lines X on the left and right of the rectangular part
And a triangular portion 36 connected via
It is connected via a line Y1 that is folded 180 degrees and
Line Y2 that is valley-folded by approximately 90 degrees on the other rectangular portion 34
From the trapezoidal portion 37 connected via
Formed into a rectangular shape, and fold the substantially rectangular plate-shaped material 33 into valley folds.
By folding along line Y and mountain fold line X, the above triangle
The two shape parts 36 and the trapezoidal parts 37 are overlapped and face each other.
The overlapping portion 42 is defined as the overlapping portion 42, and the one rectangular portion 35 is overlapped.
The single part 35 that connects the parts 42 to each other, and the one and the other
Box having an open upper side of the rectangular portions 34 and 35 on one side
Body 46, at least one of the rectangular portions 34, 35
The upper part of the above is used as a mounting part for the main body 31, and the overlapping part 42 is formed as a part.
A bracket structure characterized by being used as a mounting portion for the product 32 .