WO2013122215A1

WO2013122215A1 - Elastic member

Info

Publication number: WO2013122215A1
Application number: PCT/JP2013/053728
Authority: WO
Inventors: 健二岩味; 水野　英治; 雄生佐藤; 雄一平田
Original assignee: 中央発條株式会社
Priority date: 2012-02-15
Filing date: 2013-02-15
Publication date: 2013-08-22
Also published as: JPWO2013122215A1; JP6027033B2

Abstract

The present invention relates to an elastic member which is elastically deformed by receiving a load. The elastic member is provided with at least one shell part which is curved into an approximate dome shape and which receives a load and is elastically deformed. The part of the at least one shell part receiving the load is moulded into a shape such that the load is distributed.

Description

Elastic member

Cross-reference of related applications

This international application claims priority based on Japanese Patent Application No. 2012-030605 filed with the Japan Patent Office on February 15, 2012, and is based on Japanese Patent Application No. 2012-030605. The entire contents are incorporated herein by reference.

The present invention relates to an elastic member having at least one shell portion curved in a substantially dome shape.

For example, a sheet-like elastic member disclosed in the following Patent Document 1 is a member in which a plurality of dome-like convex portions or concave portions are formed on a sheet-like elastic body.

JP 2009-76379 A

However, since the invention described in Patent Document 1 is configured to come into contact with a support target such as a fuel cell at the top of a convex portion or the like, the load is received by point contact. For this reason, a load will act on an elastic member locally and is not preferable for an elastic member.

Therefore, it is preferable that one aspect of the present invention can provide an elastic member capable of suppressing a load from acting locally.

The present invention is an elastic member that is elastically deformed by receiving a load, and includes at least one shell portion that is elastically deformed by receiving a load and is curved in a substantially dome shape. The site | part which receives the load in at least 1 shell part is formed in the shape which disperse | distributes a load.

In the present invention configured as described above, it is possible to disperse the load and to suppress local concentration of stress and uneven distribution of surface pressure.

FIG. 1A is a perspective view of an elastic member according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of the elastic member according to an embodiment of the present invention. 2A is a cross-sectional view of the shell portion according to the first embodiment of the present invention, and FIG. 2B is a perspective view of the shell portion according to the first embodiment of the present invention. FIG. 3A is a cross-sectional view of a shell portion according to the second embodiment of the present invention, and FIG. 3B is a perspective view of the shell portion according to the second embodiment of the present invention. FIG. 4A is a cross-sectional view of a shell portion according to the third embodiment of the present invention, and FIG. 4B is a perspective view of the shell portion according to the third embodiment of the present invention. FIG. 5A is a cross-sectional view of a shell portion according to the fourth embodiment of the present invention, and FIG. 5B is a perspective view of the shell portion according to the fourth embodiment of the present invention. FIG. 6A is a sectional view of a shell portion according to the fifth embodiment of the present invention, and FIG. 6B is a perspective view of the shell portion according to the fifth embodiment of the present invention. FIG. 7A is a sectional view of a shell portion according to the fifth embodiment of the present invention, and FIG. 7B is a perspective view of the shell portion according to the fifth embodiment of the present invention. FIG. 8A is a sectional view of a shell portion according to the fifth embodiment of the present invention, and FIG. 8B is a perspective view of the shell portion according to the fifth embodiment of the present invention. FIG. 9A is a cross-sectional view of a shell portion according to the sixth embodiment of the present invention, and FIG. 9B is a perspective view of the shell portion according to the sixth embodiment of the present invention. 10A is a cross-sectional view of a shell portion according to the sixth embodiment of the present invention, and FIG. 10B is a perspective view of the shell portion according to the sixth embodiment of the present invention. FIG. 11A is a cross-sectional view of a shell portion according to the sixth embodiment of the present invention, and FIG. 11B is a perspective view of the shell portion according to the sixth embodiment of the present invention. FIG. 12A is a cross-sectional view of a shell portion according to the sixth embodiment of the present invention, and FIG. 12B is a perspective view of the shell portion according to the sixth embodiment of the present invention. FIG. 13A is a cross-sectional view of a shell portion according to the sixth embodiment of the present invention, and FIG. 13B is a perspective view of the shell portion according to the sixth embodiment of the present invention. FIG. 14A is a cross-sectional view of a shell portion according to the seventh embodiment of the present invention, and FIG. 14B is a perspective view of the shell portion according to the seventh embodiment of the present invention. FIG. 15A is a cross-sectional view of the shell portion according to the seventh embodiment of the present invention, and FIG. 15B is a perspective view of the shell portion according to the seventh embodiment of the present invention. It is sectional drawing of the elastic member which concerns on 8th Embodiment of this invention. It is sectional drawing of the elastic member which concerns on 9th Embodiment of this invention. It is sectional drawing of the elastic member which concerns on 10th Embodiment of this invention. FIG. 19A is a cross-sectional view of a shell portion according to the eleventh embodiment of the present invention, and FIG. 19B is a perspective view of the shell portion according to the eleventh embodiment of the present invention. It is a perspective view of the shell part which concerns on the modification of this invention.

DESCRIPTION OF SYMBOLS 1 ... Elastic member 3 ... Thin plate material 5 ... Shell part 5B ... Outer edge 5A ... Contact part 5C ... Raised part 5D ... Recessed part 5E ... Hole 5F ... Slit hole 7 ... Spacer sheet

The embodiments of the present invention described below are merely examples. In other words, the invention-specific matters described in the claims are not limited to the specific structures shown in the following embodiments.

And this embodiment applies this invention to the elastic member used when elastically supporting the apparatus (henceforth a to-be-supported body) mounted in moving bodies, such as a motor vehicle. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1. Structure of Elastic Member The elastic member according to the present embodiment is constituted by a thin metal plate such as a spring steel plate, stainless steel or titanium.

That is, as shown in FIGS. 1A and 1B, the elastic member 1 is obtained by providing a plurality of shell portions 5 on a sheet-like thin plate material 3. In the present embodiment, the shell portion 5 is integrally formed with the thin plate material 3 by pressing the thin plate material 3.

Further, the plurality of shell portions 5 according to the present embodiment have congruent shapes. 2A and 2B, each shell portion 5 is a portion curved in a substantially dome shape, and is elastically deformed by receiving a load from the supported body. In addition, the shape of the outer edge 5B of the shell part 5 which concerns on this embodiment is circular.

A portion of the shell portion 5 that receives a load through direct or indirect contact with the support (hereinafter referred to as a contact portion 5A) is configured to be linear as shown in FIG. 2B. ing.
Note that “the contact portion 5A is linear” means that, for example, when the invention described in Patent Document 1 is “invention that receives a load by point contact”, the portion that receives the load is “ When referred to as “dots”, it refers to a state “distributed in a multi-point manner such that the portions that receive the load of“ dots ”are connected in a line.

The contact portion 5A has a closed curve concentric with the outer edge 5B, that is, a circular shape. That is, as shown in FIG. 2A, the shell portion 5 has a raised portion 5C that swells substantially in a dome shape in the first direction, and a part of the raised portion 5C in a direction opposite to the first direction (hereinafter referred to as the second direction). It is configured to have a depressed portion 5D that is depressed in the direction.

For this reason, the center of curvature O1 of the raised portion 5C is located on the second direction side with respect to the thin plate material 3 constituting the shell portion 5. On the other hand, the center of curvature O <b> 2 of the depressed portion 5 </ b> D is located on the first direction side with respect to the thin plate material 3. Incidentally, in the present embodiment, the radius of curvature R1 of the raised portion 5C and the radius of curvature R2 of the depressed portion 5D have substantially the same dimensions.

Incidentally, the alternate long and two short dashes line indicates the shell portion 5 when the depressed portion 5D is not provided, that is, only the raised portion 5C. When the depressed portion 5D is not provided, the curvature center O1 of the curved surface constituting the shell portion 5 is only on the second direction side with respect to the thin plate material 3, that is, only on one side with respect to the shell portion 5. Exists.

In the present embodiment, the figure centered on the outer edge of the raised portion 5C, that is, the face center O3 of the figure bordered by the outer edge of the shell part 5 and the face center O4 of the figure bordered by the outer edge of the depressed part 5D are the first. It is consistent when viewed from a direction parallel to the direction of. For this reason, in the present embodiment, the face center O3 and the face center O4 are located on an imaginary line L1 passing through the center of curvature O1 of the raised portion 5C and the center of curvature O2 of the depressed portion 5D, and the contact portion 5A is As described above, a closed curve concentric with the outer edge 5B, that is, a circular shape.

The face of a figure means a point where the area moments of the figure are balanced, and is a point that coincides with the so-called “figure center of gravity”.
2. Features of the elastic member according to the present embodiment In the elastic member 1 according to the present embodiment, since the contact portion 5A, which is a part that receives the load, is linear, the load acting on the elastic member 1 can be dispersed, The local concentration of stress can be suppressed.

Further, since the contact portion 5A is circular, it becomes easy to maintain the symmetry when the shell portion 5 is elastically deformed. Therefore, problems such as local plastic deformation such that the shell portion 5 is crushed can be suppressed in advance.

(Second Embodiment)
In the first embodiment, the center of curvature O1 of the raised portion 5C is set on one side with respect to the thin plate material 3, and the center of curvature O2 of the depressed portion 5D is set on the other side. However, in the present embodiment, FIG. 3B, both the center of curvature O1 of the raised portion 5C and the center of curvature O2 of the depressed portion 5D are set on the same side with respect to the thin plate material 3.

That is, the raised portion 5C according to the present embodiment also swells in the first direction, similarly to the raised portion 5C according to the first embodiment. However, in this embodiment, the curved surface extending from the outer edge of the raised portion 5C (outer edge of the shell portion 5) to the contact portion 5A in the raised portion 5C is such that the center of curvature O1 exists on the same side as the depressed portion 5D. , Curved so as to be convex toward the second direction.

Also in this embodiment, as in the first embodiment, the face center O3 of the figure bordered by the outer edge of the raised portion 5C and the face center O4 of the figure bordered by the outer edge of the depressed portion 5D are from the first direction. Look and agree.

For this reason, the curvature center O1 of the curved surface extending from the outer edge of the shell part 5 to the contact part 5A, that is, the curvature center O1 of the raised part 5C is not one point, and the circle and the depressed part that the outer edge of the raised part 5C is edged. The 5D outer edge is a circle L2 concentric with the circle bordered.

And also in this embodiment, since the contact part 5A which is a site | part which receives a load is linear, the load which acts on the elastic member 1 can be disperse | distributed, and it can suppress that stress concentrates locally. .

(Third embodiment)
In this embodiment, as shown in FIGS. 4A and 4B, a plurality of contact portions 5A are provided, and a straight line connecting the vertices of the plurality of contact portions 5A is virtually formed. And the some contact part 5A is comprised circularly so that it may become concentric with the circle | round | yen which the outer edge of 5 C of protruding parts borders. For this reason, the depressed portion 5D according to the present embodiment has a shape in which a plurality of annular grooves depressed in the second direction are arranged concentrically.

In FIGS. 4A and 4B, the raised portion 5C is curved so as to be convex toward the second direction as in the second embodiment. However, the present embodiment is not limited to this. Similarly to the first embodiment, the raised portion 5C may be curved so as to protrude toward the first direction.

(Fourth embodiment)
In the present embodiment, as shown in FIGS. 5A and 5B, the contact portion 5A has a planar shape. And in the shell part 5 which concerns on this embodiment, the depression part 5D is not provided.

Thereby, in this embodiment, since the contact part 5A which is a site | part which receives a load is planar, the load which acts on the elastic member 1 can be disperse | distributed, and it can suppress that stress concentrates locally. .

In FIGS. 5A and 5B, the raised portion 5C is curved so as to be convex toward the first direction as in the first embodiment. However, the present embodiment is not limited to this. Similarly to the second embodiment, the raised portion 5C may be curved so as to protrude toward the second direction.

5A and 5B, the depressed portion 5D is not provided. For example, as shown by a two-dot chain line, the outer edge of the depressed portion 5D is made sufficiently smaller than the outer dimension of the abutting portion 5A. If an annular shape having a width of the contact portion 5A is used, the contact portion 5A can be planar even when the depressed portion 5D is provided. At this time, similarly to the third embodiment, a plurality of depressed portions 5D may be provided, and a plurality of planar contact portions 5A may be provided.

(Fifth embodiment)
In the present embodiment, as shown in FIGS. 6A, 6B, 7A, 7B, 8A, and 8B, a hole 5E is provided in the shell portion 5.

And the hole 5E which concerns on this embodiment is located on the face center of the figure which the outer edge of the shell part 5 borders seeing from the 1st direction. That is, the hole 5E is located at a position corresponding to the center of the circle bordered by the outer edge of the shell portion 5.

6A and 6B are examples in which holes 5E are provided in the shell portion 5 according to the first embodiment, and FIGS. 7A and 7B are examples in which holes 5E are provided in the shell portion 5 according to the second embodiment. 8A and 8B are examples in which a hole 5E is provided in the shell portion 5 according to the fourth embodiment.

As described above, in the present embodiment, since the hole 5E is provided in the shell portion 5, the spring constant of the elastic member 1 can be easily reduced.
That is, the spring constant of the shell portion 5 is determined by the material and thickness of the thin plate material 3 and the shape of the shell portion 5. However, it may be difficult to obtain a desired spring constant only by adjustment based on the material and thickness of the thin plate material 3. At this time, it may be possible to easily obtain a desired spring constant by adjusting any of the size and position of the hole 5E.

Moreover, since the hole 5E is located on the face center of the figure which the outer edge of the shell part 5 borders seeing from the 1st direction, it becomes easy to maintain the symmetry at the time of the shell part 5 elastically deforming. . Therefore, problems such as local plastic deformation such that the shell portion 5 is crushed can be suppressed in advance.

(Sixth embodiment)
9A, 9B, 10A, 10B, 11A, 11B, 12A, 12B, 13A, and 13B, the present embodiment extends radially from a position corresponding to the face center of the figure that the outer edge of the shell portion 5 borders. A slit-shaped hole 5F (hereinafter referred to as a slit hole 5F) is provided.

In the present embodiment, since the figure bordered by the outer edge of the shell portion 5 is a circle, a plurality of slit holes 5F are provided at equal intervals so as to equally divide the periphery of the face of the figure.
9A and 9B and FIGS. 10A and 10B are examples in which a slit hole 5F is provided in the shell portion 5 according to the first embodiment, and FIGS. 11A and 11B and FIGS. 12A and 12B are shell portions according to the second embodiment. 5 is an example in which a slit hole 5F is provided, and FIGS. 13A and 13B are examples in which a slit hole 5F is provided in the shell portion 5 according to the fourth embodiment.

9A, 9B and FIGS. 11A, 11B are examples in which the slit hole 5F is provided in the depressed portion 5D, and FIGS. 10A, 10B, 12A, and 12B are examples in which the slit hole 5F is provided in the raised portion 5C. Incidentally, in the example shown in FIGS. 9A, 9B, 10A, 10B, 11A, 11B, 12A, and 12B, the slit hole 5F may be provided in any of the raised portion 5C and the depressed portion 5D. Moreover, in the example shown to FIG. 13A and 13B, you may provide the slit hole 5F in the contact part 5A.

As described above, in the present embodiment, since the slit hole 5F is provided in the shell portion 5, the same actions and effects as in the fifth embodiment can be obtained.
(Seventh embodiment)
As shown in FIGS. 14A and 14B and FIGS. 15A and 15B, the present embodiment is a combination of the fifth embodiment and the sixth embodiment. That is, the hole 5E is provided on the face center of the figure bordered by the outer edge of the shell portion 5, and a plurality of slit holes 5F extending radially from the hole 5E are provided.

14A and 14B are examples in which the present embodiment is applied to the shell portion 5 according to the first embodiment, and FIGS. 15A and 15B are examples in which the present embodiment is applied to the shell portion 5 according to the second embodiment. is there.

Incidentally, which shape is selected from the fifth to seventh embodiments is appropriately determined based on various specifications such as a spring constant required for the elastic member 1.
(Eighth embodiment)
In the above-described embodiment, the elastic member 1 is configured by one thin plate material 3, but in this embodiment, as shown in FIGS. 16A and 16B, a plurality of thin plate materials 3 in which a plurality of shell portions 5 are formed are stacked. Thus, the elastic member 1 is configured.

16A is an example in which the two thin plate members 3 are stacked in the load direction so that the first direction is the same direction, and FIG. 16B is such that the first direction is different from each other. This is an example in which two thin plate members 3 are stacked.

Incidentally, the outer periphery of each shell part 5 among the plurality of thin plate members 3 is coupled by a joint structure such as spot welding or adhesive, or a mechanical restraint structure such as filling or bending. For this reason, each of the plurality of thin plate members 3 is restricted from moving relatively remarkably.

Incidentally, the shell portion 5 shown in FIGS. 16A and 16B is the shell portion 5 according to the first embodiment, but the present embodiment is not limited to this, and the shell portions according to the second to seventh embodiments. Any of the parts 5 may be sufficient.

Further, in FIGS. 16A and 16B, the elastic member 1 is formed by stacking two thin plate materials 3, but the present invention is not limited to this, and three or more thin plate materials 3 may be stacked. In this case as well, it is necessary that each thin plate member 3 is restricted from moving relatively remarkably.

(Ninth embodiment)
In the present embodiment, as shown in FIG. 17, two thin plate members 3 are stacked in the load direction, and a spacer sheet 7 having rigidity equal to or higher than that of the thin plate member 3 is disposed between the two thin plate members 3. Is. In this embodiment, the same sheet material as the thin plate material 3 is used as the spacer sheet 7, and the plurality of thin plate materials 3 and the spacer sheet 7 are joined by spot welding or an adhesive.

Incidentally, the shell portion 5 shown in FIG. 17 is the shell portion 5 according to the first embodiment, but the present embodiment is not limited to this, and the shell portion 5 according to the second to seventh embodiments. Any of these may be sufficient.

Moreover, in FIG. 17, although it was the elastic member 1 which piled up the two thin plate materials 3, this invention is not limited to this, You may pile up three or more thin plate materials 3. FIG.
Moreover, in FIG. 17, although it was the example which piled up the two thin plate materials 3 in the load direction so that the 1st direction might become the same direction, this embodiment is not limited to this. As shown in FIG. 16B, a plurality of thin plate members 3 may be stacked such that the first directions are different from each other.

(10th Embodiment)
In the above-described embodiment, the shell portions 5 provided on one thin plate member 3 are congruent in shape. However, in the present embodiment, as shown in FIG. This is an example in which a shell portion 5 having a different first direction is provided.

Incidentally, the shell portion 5 shown in FIG. 18 is the shell portion 5 according to the first embodiment, but the present embodiment is not limited to this, and the shell portion 5 according to the second to seventh embodiments. Any of these may be sufficient. Moreover, you may combine this embodiment and 8th Embodiment or 9th Embodiment.

(Eleventh embodiment)
In this embodiment, as shown in FIGS. 19A and 19B, a part from the outer edge of the raised part 5C (outer edge of the shell part 5) to the contact part 5A in the raised part 5C and the contact part 5A in the depressed part 5D. At least one of the portions from the center to the center of the depressed portion 5D is configured by a conical conical surface. Incidentally, FIGS. 19A and 19B show an example in which both portions are conical surfaces.

In addition, this embodiment is not limited to a shape as shown to FIG. 19A and 19B, You may combine with the elastic member 1 which concerns on this embodiment, and the elastic member 1 in any one of above-described embodiment. .

(Other embodiments)
In the above-described embodiment, the plurality of shell portions 5 are arranged in a lattice pattern on the thin plate material 3, but the present invention is not limited to this. For example, the plurality of shell portions 5 are thin plate materials. 3 may be configured in a zigzag manner, or may be configured such that one shell portion 5 is provided.

Further, in the above-described embodiment, the contact portion 5A is a linear or disc-shaped plane that draws a circular closed curve, but the present invention is not limited to this, for example, an ellipse (Including an ellipse and a spindle shape.) It is good also as a shape.

In the above-described embodiment, the outer edge shape of the shell portion 5 is a circle. However, the present invention is not limited to this, and includes, for example, an ellipse (an ellipse, a spindle shape, etc.) as shown in FIG. .) It is good also as a shape.

In the above-described embodiment, the face center of the figure bordered by the outer edge of the raised portion 5C and the face center of the figure bordered by the outer edge of the depressed portion 5D are the same as viewed from the first direction. The invention is not limited to this, and the face center of the figure bordered by the outer edge of the raised portion 5C may not coincide with the face center of the figure bordered by the outer edge of the depressed portion 5D.

In the above-described embodiment, the present invention is applied to the elastic member used when elastically supporting a device mounted on a moving body such as an automobile. However, the present invention is not limited to this.
In the above-described embodiment, the plurality of shell portions 5 have the same shape, but the present invention is not limited to this, and for example, shell portions 5 having different sizes and shapes may be combined. .

Further, in the third embodiment, the plurality of contact portions 5A are configured to be concentric, but the present invention is not limited to this. For example, each contact portion 5A is It is good also as a structure where the face center of the figure to draw does not correspond.

In the sixth embodiment, a plurality of slit holes 5F are provided at equal intervals so as to equally divide the periphery of the face of the figure bordered by the outer edge of the shell portion 5, but the present invention is limited to this. For example, a plurality of slit holes 5F may be provided at unequal intervals, or one slit hole 5F may be provided.

Further, in the fifth to seventh embodiments, the hole 5E and the slit hole 5F are through holes that penetrate the thin plate material 3, but the present invention is not limited to this, and for example, penetrates the thin plate material 3. It may be a concave blind hole. In the case where the hole 5E and the slit hole 5F are concave blind holes, they may be blind holes that are recessed in either the first direction or the second direction.

In the seventh embodiment, the hole 5E and the slit hole 5F communicate with each other. However, the present invention is not limited to this, and the hole 5E and the slit hole 5F may be discontinuous.
Further, the present invention is not limited to the above-described embodiment as long as it matches the gist of the invention described in the claims.

Claims

An elastic member that is elastically deformed by receiving a load,
Comprising at least one shell portion that is elastically deformed in response to the load and curved in a substantially dome shape;
A portion of the at least one shell portion that receives the load is an elastic member that is shaped to disperse the load.
The elastic member according to claim 1, wherein the portion that receives the load is shaped to form one of a line and a surface.
The elastic member according to claim 2, wherein the portion that receives the load is formed in a closed curve shape.
The elastic member according to claim 2 or 3, wherein the at least one shell portion is curved so that a center of curvature exists on both sides of the at least one shell portion.
The elastic member according to any one of claims 2 to 4, wherein an outer edge shape of the at least one shell portion is one of a circular shape and an elliptical shape.
The at least one shell portion has a raised portion that swells substantially in a dome shape in a first direction, and a depressed portion in which a portion of the raised portion is depressed in a direction opposite to the first direction. The elastic member of any one of Claim 2 thru | or 5.
The elastic member according to claim 6, wherein a face center of a figure bordered by an outer edge of the raised portion coincides with a face center of a figure bordered by an outer edge of the depressed portion as viewed from the first direction.
The elastic member according to any one of claims 2 to 7, wherein the at least one shell portion is provided with a first hole.
The elastic member according to claim 8, wherein when viewed from the first direction, the first hole is located on a face center of a figure bordered by an outer edge of the at least one shell portion.
10. The slit-shaped second hole extending radially from a position corresponding to a face center of a figure bordered by an outer edge of the at least one shell portion is provided in the at least one shell portion. The elastic member of any one of these.
The elastic member according to any one of claims 1 to 10, wherein the elastic member is laminated in a load direction,
The elastic member by which the spacer sheet | seat which has the rigidity more than equivalent to the sheet-like member which comprises the said at least 1 shell part is arrange | positioned between the elastic members of any one of Claim 1 thru | or 10.