JP4611244B2 - Corrugated coil spring - Google Patents

Corrugated coil spring Download PDF

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JP4611244B2
JP4611244B2 JP2006151031A JP2006151031A JP4611244B2 JP 4611244 B2 JP4611244 B2 JP 4611244B2 JP 2006151031 A JP2006151031 A JP 2006151031A JP 2006151031 A JP2006151031 A JP 2006151031A JP 4611244 B2 JP4611244 B2 JP 4611244B2
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coil spring
peak
valley
corrugated
recess
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JP2007321832A (en
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博行 鈴木
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Piolax Inc
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Piolax Inc
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/34—Ring springs, i.e. annular bodies deformed radially due to axial load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/048—Wound springs with undulations, e.g. wavy springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/06—Wound springs with turns lying in cylindrical surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/32—Belleville-type springs
    • F16F1/328—Belleville-type springs with undulations, e.g. wavy springs

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Description

この発明は、例えば、自動車部品である自動変速機のクラッチ装置等に組み込まれる波形コイルばねに関する。   The present invention relates to a wave coil spring incorporated in, for example, a clutch device of an automatic transmission that is an automobile part.

波形コイルばねは、帯状のばね材料を波形に加工するとともに螺旋状に巻回して構成され、自動変速機のクラッチ装置に内蔵された油圧ピストンのリターン用スプリングとして、あるいは、各種機器類における緩衝用のスプリングとして広く一般に使用されている。この種の波形コイルばねとしては、例えば、特許文献１に開示されたものがある。   Corrugated coil springs are formed by processing a strip-shaped spring material into a corrugated shape and winding it spirally, and as a return spring for a hydraulic piston built into the clutch device of an automatic transmission or for buffering in various devices It is widely used as a spring. An example of this type of corrugated coil spring is disclosed in Patent Document 1.

図９は、従来の波形コイルばねの課題を説明するための図である。同図では、波形コイルばねにおいて上下に隣接するｎ巻目の段とｎ＋１巻目の段とを直線的に展開し模式的に示している。そして、同図（ａ）は圧縮荷重が作用していない状態を示し、同図（ｂ）は圧縮荷重が作用する状態を示している。
同図（ａ）に示すように、波形コイルばねは、波形加工によって山部１０１，２０１と谷部１０２，２０２とが交互に形成され、ｎ巻目の段（下段）の山部１０１とｎ＋１巻目の段（上段）の谷部２０２とが、頂部Ｔにおいて接触又は対向している。そして、軸方向に圧縮荷重が加えられると、本来であれば、山部１０１と谷部２０２の頂部Ｔにその圧縮荷重Ｐが作用して、山部１０１と谷部２０２が頂部Ｔを中心として均等にたわみ変形する。 FIG. 9 is a diagram for explaining a problem of a conventional wave coil spring. In the same figure, in the wave coil spring, the n-th stage and the n + 1-th stage adjacent to each other in the vertical direction are schematically developed linearly. FIG. 6A shows a state where a compressive load is not applied, and FIG. 5B shows a state where a compressive load is applied.
As shown in FIG. 5A, the corrugated coil spring is formed by alternately forming the crests 101 and 201 and the troughs 102 and 202 by corrugation, and the crest 101 and n + 1 of the n-th stage (lower stage). The valley portion 202 of the step (upper portion) of the winding is in contact with or opposed to the top portion T. When a compressive load is applied in the axial direction, the compressive load P acts on the tops T of the peaks 101 and the valleys 202, and the peaks 101 and the valleys 202 are centered on the peaks T. Deforms evenly.

しかしながら、加工誤差や組付け誤差、あるいは軸方向以外の方向からの外力作用などによって、隣接するｎ巻目の段とｎ＋１巻目の段の当接部にずれが生じた場合、同図（ｂ）に示すように、ｎ巻目の段とｎ＋１巻目の段の当接部が一方向へスライドして、山部１０１と谷部２０２の中腹部に圧縮荷重Ｐが作用することがあった。   However, when a deviation occurs in the contact portion between the adjacent n-th roll and the n + 1-th roll due to a machining error, an assembly error, or an external force action from a direction other than the axial direction, FIG. ), The contact portion between the n-th and n + 1-th steps slides in one direction, and the compressive load P may act on the mid-portions of the crest 101 and the trough 202. .

この場合、圧縮荷重Ｐの接線方向分力Ｐｈが各当接部で同じ方向を向くため、これら接線方向分力Ｐｈが各当接部に作用する摩擦力より大きくなったとき、周方向にすべり（座屈）を生じてしまい、波形コイルばねの耐荷重性能が急激に低下してしまうおそれがあった。   In this case, since the tangential component force Ph of the compressive load P is directed in the same direction at each contact portion, when the tangential component force Ph becomes larger than the frictional force acting on each contact portion, the slip is caused in the circumferential direction. (Buckling) may occur, and the load bearing performance of the corrugated coil spring may be drastically reduced.

このようなすべり（座屈）を防止するため、特許文献２のウエーブコイルスプリングは、山部と谷部の頂部（当接部）に凹部と凸部からなる係止機構を形成し、これら凹部と凸部の係合によってすべり（座屈）を防止する構成となっている。
また、特許文献３のウエーブコイルばねは、山部と谷部の頂部（当接部）に緩衝用部材を装着し、この緩衝用部材で当接部を固定してすべり（座屈）を防止する構成となっている。
特開平２００２−１７４２８２号公報 実開平５−６７８３６号公報 特開２００２−２７６７０６号公報 In order to prevent such slipping (buckling), the wave coil spring of Patent Document 2 forms a locking mechanism composed of a concave portion and a convex portion at the top (contact portion) of the peak portion and the valley portion. And slip (buckling) is prevented by the engagement of the projections.
In addition, the wave coil spring of Patent Document 3 has a cushioning member mounted on the top (abutting portion) of the peak portion and the valley portion, and the abutting portion is fixed by this cushioning member to prevent slipping (buckling). It is the composition to do.
Japanese Patent Laid-Open No. 2002-174282 Japanese Utility Model Publication No. 5-67836 JP 2002-276706 A

しかしながら、特許文献２のウエーブコイルスプリングにあっては、当接部の凹部と凸部からなる係止機構を設けなければならず、また特許文献３のウエーブコイルばねにあっては、当接部に緩衝用部材を装着しなければならないため、作業工数が多く、製作が煩雑となる課題があった。   However, in the wave coil spring of Patent Document 2, a locking mechanism consisting of a concave portion and a convex portion of the contact portion must be provided, and in the wave coil spring of Patent Document 3, the contact portion Since the buffer member has to be mounted on the device, there is a problem that the number of work steps is large and the production becomes complicated.

本発明は、このような事情に鑑みてなされたもので、容易に製作でき、しかも周方向のすべり（座屈）を防止して良好な耐荷重性能を維持できる波形コイルばねの提供を目的とする。   The present invention has been made in view of such circumstances, and an object thereof is to provide a corrugated coil spring that can be easily manufactured and that can prevent slippage in the circumferential direction (buckling) and maintain good load bearing performance. To do.

上記目的を達成するために、請求項１の発明は、帯状のばね材料を山部と谷部とを有する波形形状に加工するとともに螺旋状に巻回して構成されたばね本体からなる波形コイルばねにおいて、
前記山部の頂部付近に前記谷部より幅の狭い凹部を有し、
少なくとも前記ばね本体が圧縮荷重を受けて軸方向へ縮んだとき、ｎ巻目（ｎは自然数）の段に形成された前記凹部に、ｎ＋１巻目の段にある谷部の対向する底部が入り込んで当接するよう構成してあることを特徴とする。 In order to achieve the above object, the invention according to claim 1 is a corrugated coil spring comprising a spring body formed by processing a strip-shaped spring material into a corrugated shape having a peak portion and a trough portion and spirally winding the material. ,
A concave portion narrower than the trough near the top of the peak,
When at least the spring body receives a compressive load and contracts in the axial direction, the opposed bottoms of the valleys at the (n + 1) th winding step enter the recesses formed at the nth winding (n is a natural number). It is comprised so that it may contact | abut.

また、請求項２の発明は、請求項１を前提として、前記山部の頂部付近に形成された凹部が、これに当接する谷部の底部よりも大きい曲率半径を有していることを特徴とする。
一方、請求項３の発明は、請求項１を前提として、前記山部の頂部付近に形成された凹部が、これに当接する谷部の底部よりも小さい曲率半径を有していることを特徴とする。 According to a second aspect of the present invention, on the premise of the first aspect, the concave portion formed in the vicinity of the top portion of the peak portion has a larger radius of curvature than the bottom portion of the valley portion in contact with the concave portion. And
On the other hand, the invention of claim 3 is based on claim 1 and is characterized in that the recess formed near the top of the peak has a smaller radius of curvature than the bottom of the valley contacting the peak. And

さらに、請求項４の発明は、請求項１乃至３を前提として、前記凹部を、すべての山部の頂部付近に形成したことを特徴とする。   Furthermore, the invention of claim 4 is characterized in that, on the premise of claims 1 to 3, the recess is formed in the vicinity of the tops of all the peaks.

請求項１の発明によれば、幅の狭い凹部に、対向する次の段に形成された谷部の底部が入り込んで当接するため、この底部裏面が凹部内の両斜面に支えられて周方向へのすべり移動が抑止される。しかも、本発明の波形コイルばねは、山部の頂部付近に凹部を形成するだけで、従来の製造工程を大幅に変更することなく容易に製造することができる。   According to the first aspect of the present invention, since the bottom portion of the valley portion formed in the next opposing step enters and contacts the narrow concave portion, the bottom portion back surface is supported by the both inclined surfaces in the concave portion, and thus in the circumferential direction. Slip movement to is suppressed. Moreover, the corrugated coil spring of the present invention can be easily manufactured by simply forming a recess near the top of the peak without significantly changing the conventional manufacturing process.

ここで、請求項２のごとく、山部の頂部付近に形成された凹部が、これに当接する谷部の底部よりも大きい曲率半径を有する構成とすれば、凹部の奥底まで谷部の底部が入り込むことが可能となるため、強固な噛み合い状態が形成されて確実に周方向へのすべりを防止することができる。   Here, as in claim 2, if the recess formed near the top of the peak has a larger radius of curvature than the bottom of the valley contacting this, the bottom of the valley reaches the bottom of the recess. Since it becomes possible to enter, a firm meshing state is formed, and sliding in the circumferential direction can be surely prevented.

一方、請求項３のごとく、山部の頂部付近に形成された凹部が、これに当接する谷部の底部よりも小さい曲率半径を有する構成とすれば、谷部の底部が凹部内の両側壁に当接して両側から支持されるので、凹部内での僅かな位置ずれも抑制することができる。   On the other hand, if the recess formed near the top of the peak has a smaller radius of curvature than the bottom of the valley contacting the peak, the bottom of the valley is on both side walls in the recess. And is supported from both sides, so that a slight displacement in the recess can also be suppressed.

凹部は、すべての山部の頂部付近に形成する必要はなく、一つおき、二つおき等、任意に選択した山部の頂部付近に形成すればよい。もっとも、請求項４のように、すべての山部の頂部付近に凹部を形成すれば、相互に当接する山部と谷部のすべてにおいて周方向へのすべり移動が抑制されるため、ばね本体の周方向のすべりを高精度に抑制するにはこの構成が好ましい。   The recesses need not be formed near the tops of all the peaks, but may be formed near the tops of the peaks selected arbitrarily, such as every other or every other peak. However, if the recesses are formed near the tops of all the crests as in claim 4, slip movement in the circumferential direction is suppressed in all of the crests and troughs that are in contact with each other. This configuration is preferable for suppressing circumferential slip with high accuracy.

以上説明したように、本発明によれば、容易に製作でき、しかも周方向のすべり（座屈）を防止して良好な耐荷重性能を維持できる波形コイルばねを提供することができる。   As described above, according to the present invention, it is possible to provide a corrugated coil spring that can be easily manufactured and that can prevent slippage (buckling) in the circumferential direction and maintain good load bearing performance.

以下、この発明の実施の形態について図面を参照して詳細に説明する。
図１は本実施形態に係る波形コイルばねの全体構成を示す斜視図であり、図２は当該波形コイルばねにおいて、上下に隣接するｎ巻目の段とｎ＋１巻目の段とを直線的に展開し模式的に示した図、図３は図２に示した波形コイルばねの一部を拡大して示す図である。
図１に示すように、波形コイルばねは、帯状のばね材料を波形に加工するとともに螺旋状に巻回してばね本体１を構成している。このばね本体１は、図２に示すように、波形加工によって山部Ａと谷部Ｂとを交互に形成してある。
ここで、山部Ａとは、谷部Ｂの底部１０からはじまり、頂部１１を経て隣接する谷部Ｂの底部１０に至る領域をいう（図３参照）。また、谷部Ｂとは、山部の頂部１１からはじまり、底部１０を経て隣接する山部Ａの頂部１１に至る領域をいう。したがって、山部Ａと谷部Ｂとはそれぞれ重なり合っている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing the overall configuration of the corrugated coil spring according to the present embodiment, and FIG. 2 shows a straight line between the n-th and n + 1-th steps adjacent to each other in the corrugated coil spring. FIG. 3 is an enlarged view schematically showing a part of the wave coil spring shown in FIG.
As shown in FIG. 1, the corrugated coil spring forms a spring body 1 by processing a strip-shaped spring material into a corrugated shape and winding it spirally. As shown in FIG. 2, the spring main body 1 has ridges A and valleys B formed alternately by corrugation.
Here, the peak A refers to a region that starts from the bottom 10 of the valley B and reaches the bottom 10 of the adjacent valley B through the top 11 (see FIG. 3). Moreover, the valley part B refers to a region that starts from the top part 11 of the mountain part and reaches the top part 11 of the adjacent mountain part A through the bottom part 10. Therefore, the mountain part A and the valley part B overlap each other.

図３に拡大して示すように、山部Ａの頂部１１付近には、凹部１２が形成してある。この凹部１２は、谷部Ｂより幅が狭く、更に本実施形態では谷部Ｂよりも浅く形成してある。また、ｎ巻目の段（下段）にある山部Ａの凹部１２は、ｎ＋１巻目の段（上段）にある谷部Ｂの底部１０と対向するように相互の位置が調整してある。なお、本明細書において、ｎは自然数を示している（図２参照）。   As shown in an enlarged view in FIG. 3, a recess 12 is formed near the top 11 of the peak A. The recess 12 is narrower than the valley B, and is formed shallower than the valley B in this embodiment. Further, the positions of the recesses 12 of the peak A at the n-th roll (lower) are adjusted so as to face the bottom 10 of the valley B at the (n + 1) -th roll (upper). In this specification, n represents a natural number (see FIG. 2).

このように対向する凹部１２と谷部Ｂの底部１０とは、ばね本体１に軸方向の圧縮荷重が作用していない状態においては、図４に示すように離間していてもよい。ただし、ばね本体１に軸方向（図２，図４の上下方向）の圧縮荷重が作用し、当該ばね本体１が軸方向に縮んだときは、山部Ａの凹部１２に対向する谷部Ｂの底部１０が当接する。   Thus, the recessed part 12 which opposes, and the bottom part 10 of the trough part B may be spaced apart as shown in FIG. 4 in the state where the axial compressive load is not acting on the spring main body 1. However, when a compressive load in the axial direction (vertical direction in FIGS. 2 and 4) acts on the spring body 1 and the spring body 1 contracts in the axial direction, the trough B facing the recess 12 of the peak A The bottom portion 10 of the abuts.

さて、図５に示すように、山部Ａに形成した凹部１２の中央に、谷部Ｂの底部１０が当接する状態にあっては、ばね本体１に周方向の外力又は分力が作用しても、凹部１２内の両斜面が壁となって底部１０の周方向（図５の左右方向）の移動を阻止する。したがって、ばね本体１の周方向へのすべりが抑制される。   As shown in FIG. 5, when the bottom 10 of the valley B is in contact with the center of the recess 12 formed in the peak A, a circumferential external force or component force acts on the spring body 1. However, both slopes in the recess 12 serve as walls to prevent the bottom 10 from moving in the circumferential direction (left-right direction in FIG. 5). Therefore, the slip of the spring body 1 in the circumferential direction is suppressed.

ここで、図５に示すように、山部Ａの頂部付近に形成された凹部１２が、これに当接する谷部Ｂの底部１０よりも大きい曲率半径を有する構成とすれば、凹部１２の奥底まで谷部Ｂの底部１０が入り込むことが可能となるため、強固な噛み合い状態が形成されて確実に周方向へのすべりを防止することができる。   Here, as shown in FIG. 5, if the concave portion 12 formed near the top of the peak portion A has a larger radius of curvature than the bottom portion 10 of the valley portion B in contact therewith, the bottom of the concave portion 12. Since the bottom portion 10 of the valley portion B can enter, a firm meshing state is formed, and slippage in the circumferential direction can be reliably prevented.

また、図６に示すように、谷部Ｂの底部１０が山部Ａに形成した凹部１２の斜面に当接したときは、ばね本体１に作用する圧縮荷重の斜面方向の分力により、谷部Ｂの底部１０が凹部１２の中央（最深部）に向かって斜面を移動しようとする。しかし、この場合にあっても、凹部１２は谷部に比べ充分に幅狭に形成されているため、当該移動に伴う周方向のすべり量Ｌは図９に示した従来の波形コイルばねよりも少なく、よって充分に座屈を抑止する効果がある。   Further, as shown in FIG. 6, when the bottom 10 of the valley B comes into contact with the slope of the recess 12 formed in the peak A, the valley of the compression load acting on the spring body 1 causes the valley The bottom 10 of the part B tries to move on the slope toward the center (deepest part) of the recess 12. However, even in this case, since the concave portion 12 is formed to be sufficiently narrow compared to the valley portion, the circumferential slip amount L accompanying the movement is larger than that of the conventional corrugated coil spring shown in FIG. Therefore, there is an effect of sufficiently suppressing buckling.

図７は、本実施形態に係る波形コイルばねの圧縮荷重とたわみの関係を示したグラフである。コイルばね本体１に軸方向の圧縮荷重を作用させたとき、図９に示したような従来の波形コイルばねでは、周方向へのすべり（座屈）に伴い耐荷重が破線で示すように低下していく。一方、本実施形態の波形コイルばねは、周方向へのすべり（座屈）が極めて少ないため、実線で示すように良好な耐荷重性能が維持される。   FIG. 7 is a graph showing the relationship between the compression load and the deflection of the wave coil spring according to the present embodiment. When a compressive load in the axial direction is applied to the coil spring main body 1, with the conventional corrugated coil spring as shown in FIG. 9, the load resistance decreases as shown by the broken line due to circumferential slip (buckling). I will do it. On the other hand, the corrugated coil spring according to the present embodiment has very little slip (buckling) in the circumferential direction, so that good load bearing performance is maintained as shown by the solid line.

なお、本発明は上述した実施形態に限定されるものではない。
例えば、図１および図２に示すばね本体を上下逆転させれば、山部Ａが谷部に、谷部Ｂが山部になって、凹部１２は谷部の底部に形成された凸部となり、下段の山部が上段の凸部に当接する構成となるが、形式的な姿勢の違いにかかわらずそのような構成も本発明の技術的範囲に含まれることは勿論である。 In addition, this invention is not limited to embodiment mentioned above.
For example, if the spring main body shown in FIGS. 1 and 2 is turned upside down, the peak portion A becomes a valley portion, the valley portion B becomes a peak portion, and the concave portion 12 becomes a convex portion formed at the bottom portion of the valley portion. The lower ridges are in contact with the upper protrusions, but it is a matter of course that such a configuration is also included in the technical scope of the present invention regardless of the difference in formal posture.

また、図８に示すように、山部Ａの頂部付近に形成された凹部１２が、これに当接する谷部Ｂの底部１０よりも小さい曲率半径を有する構成とすれば、谷部Ｂの底部１０が凹部１２内の両側壁１２ａ，１２ｂに当接して両側から支持されるので、凹部１２内での僅かな位置ずれも抑制することができる。   Further, as shown in FIG. 8, if the recess 12 formed near the top of the peak A has a smaller radius of curvature than the bottom 10 of the valley B in contact therewith, the bottom of the valley B Since 10 is in contact with both side walls 12a and 12b in the recess 12 and is supported from both sides, a slight displacement in the recess 12 can be suppressed.

本発明の実施形態に係る波形コイルばねの全体構成を示す斜視図である。It is a perspective view which shows the whole structure of the waveform coiled spring which concerns on embodiment of this invention. 本発明の実施形態に係る波形コイルばねにおいて、上下に隣接するｎ巻目の段とｎ＋１巻目の段とを直線的に展開し模式的に示した図である。In the wave coil spring concerning the embodiment of the present invention, it is the figure which showed the step of the nth volume and the step of the n + 1th volume which adjoined up and down linearly, and was shown typically. 図２に示した波形コイルばねの一部を拡大して示す模式図である。It is a schematic diagram which expands and shows a part of corrugated coil spring shown in FIG. 本発明の実施形態に係る波形コイルばねの構造を説明するための模式図である。It is a schematic diagram for demonstrating the structure of the waveform coiled spring which concerns on embodiment of this invention. 本発明の実施形態に係る波形コイルばねの作用を説明するための模式図である。It is a schematic diagram for demonstrating the effect | action of the waveform coiled spring which concerns on embodiment of this invention. 本発明の実施形態に係る波形コイルばねの作用を説明するための模式図である。It is a schematic diagram for demonstrating the effect | action of the waveform coiled spring which concerns on embodiment of this invention. 本発明の実施形態に係る波形コイルばねの圧縮荷重とたわみの関係を示したグラフである。It is the graph which showed the relationship between the compressive load and the deflection | deviation of the waveform coiled spring which concerns on embodiment of this invention. 本発明の変形例に係る波形コイルばねの構造を説明するための模式図である。It is a schematic diagram for demonstrating the structure of the waveform coiled spring which concerns on the modification of this invention. 従来の波形コイルばねの課題を説明するための模式図である。It is a schematic diagram for demonstrating the subject of the conventional waveform coiled spring.

符号の説明Explanation of symbols

１：ばね本体、Ａ：山部、Ｂ：谷部、１０：底部、１１：頂部、１２：凹部
1: spring body, A: peak, B: valley, 10: bottom, 11: top, 12: recess

Claims (4)

帯状のばね材料を長手方向に沿って山部と谷部とを有する波形形状に加工するとともに螺旋状に巻回して構成されたばね本体からなる波形コイルばねにおいて、
前記山部の頂部付近に前記谷部より幅の狭く且つ当該谷部と同じ向きに窪んだ凹部を有し、
少なくとも前記ばね本体が圧縮荷重を受けて軸方向へ縮んだとき、ｎ巻目（ｎは自然数）の段に形成された前記凹部に、ｎ＋１巻目の段にある谷部の対向する底部が入り込んで当接するよう構成してあることを特徴とする波形コイルばね。 In a corrugated coil spring comprising a spring body configured by processing a strip-shaped spring material into a corrugated shape having a crest and a trough along the longitudinal direction and spirally winding it,
A recess recessed in the ridges the narrow rather and the same orientation as the valley width than the valleys near the top of,
When at least the spring body receives a compressive load and contracts in the axial direction, the opposed bottoms of the valleys at the (n + 1) th winding step enter the recesses formed at the nth winding (n is a natural number). A wave coil spring characterized by being configured to abut on. 前記山部の頂部付近に形成された凹部は、これに当接する谷部の底部よりも大きい曲率半径を有していることを特徴とする請求項１の波形コイルばね。 2. The corrugated coil spring according to claim 1, wherein the recess formed in the vicinity of the top of the peak has a larger radius of curvature than the bottom of the valley contacting the peak. 前記山部の頂部付近に形成された凹部は、これに当接する谷部の底部よりも小さい曲率半径を有していることを特徴とする請求項１の波形コイルばね。 2. The corrugated coil spring according to claim 1, wherein the recess formed near the top of the peak has a smaller radius of curvature than the bottom of the valley contacting the peak. 前記凹部を、すべての山部の頂部付近に形成したことを特徴とする請求項１乃至３のいずれか一項に記載した波形コイルばね。 The corrugated coil spring according to any one of claims 1 to 3, wherein the concave portion is formed in the vicinity of the top of all the peaks.
JP2006151031A 2006-05-31 2006-05-31 Corrugated coil spring Expired - Fee Related JP4611244B2 (en)

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