JPH0314902A - Impact absorbing tightening bolt - Google Patents
Impact absorbing tightening boltInfo
- Publication number
- JPH0314902A JPH0314902A JP14518589A JP14518589A JPH0314902A JP H0314902 A JPH0314902 A JP H0314902A JP 14518589 A JP14518589 A JP 14518589A JP 14518589 A JP14518589 A JP 14518589A JP H0314902 A JPH0314902 A JP H0314902A
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- force
- present
- reamer
- cylindrical body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 3
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000035939 shock Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000013016 damping Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Vibration Dampers (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、複数の部材を機械的に締結する締結体におい
て、特定の部材に生じる衝撃的な力が他の部材に伝搬す
ることを防止しうる衝撃吸収締結ボルトに関する。Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention is directed to a fastening body that mechanically fastens a plurality of members, in which an impact force generated in a specific member is applied to other members. The present invention relates to a shock absorbing fastening bolt that can prevent shock from propagating.
（従来の技術）
多くの機械構造物は、通常、多数の部品から構成され、
各部品はボルト等の締結体によって分解、再組立てが可
能なように結合されている。(Prior Art) Many mechanical structures are usually composed of many parts,
Each component is connected by fasteners such as bolts so that it can be disassembled and reassembled.
ボルトの主な使用目的は、締結しようとする複数の部品
間に力を作用させ、接触する面間に接触力・を与え、こ
の面摩擦により部品相互を固着させることである。すな
わち、ボルト自体は締結時に回転されることで、ネジの
噛合いにより引張力が生じ、この引張力によって部品間
に接触力を与える。The main purpose of bolts is to apply force between multiple parts to be fastened, to apply contact force between the contacting surfaces, and to fix the parts to each other by this surface friction. That is, the bolt itself is rotated during fastening, and a tensile force is generated by the engagement of the screws, and this tensile force provides a contact force between the parts.
このような締結体で部品を締結した機械構造物において
は、その特定の部分に動的な力、例えば衝撃力、地震力
、振動加振力などが作用すると、この力は他の部分に容
易に伝搬してゆくことになる。In a mechanical structure in which parts are fastened together using such fasteners, when a dynamic force such as an impact force, seismic force, vibration excitation force, etc. acts on a specific part, this force is easily transmitted to other parts. It will spread to.
次に、そのメカニズムを第７図を参照して説明する。Next, the mechanism will be explained with reference to FIG.
同図は板１と板２とをボルト３で結合した状態を示すも
ので、板１には、ボルト３の最大外径ｄよりも大きい外
径ｄｏの孔が明けられている。また、板２にはボルトの
ネジに合ったネジ部４が形成されている。This figure shows a state in which plates 1 and 2 are coupled with bolts 3, and plate 1 has a hole with an outer diameter do larger than the maximum outer diameter d of bolt 3. Further, the plate 2 is formed with a threaded portion 4 that matches the thread of the bolt.
これらの部材を組立てる際、ボルト３の頭をスパナで締
付けると、ボルト自身には、その軸方向に、接触力Ｆが
生じる。この力はボルトを弛めようとする方向に作用す
るため、通常は平座金５とばね座金６により回り止めを
行う。When assembling these members, when the head of the bolt 3 is tightened with a spanner, a contact force F is generated in the bolt itself in its axial direction. Since this force acts in the direction of loosening the bolt, the flat washer 5 and spring washer 6 are usually used to prevent rotation.
前記接触力Ｆは板１と板２の接触面７に接触力を与える
。The contact force F applies a contact force to the contact surfaces 7 of the plates 1 and 2.
ここで、板１に何らかの原因によって動的な力Ｔが、図
の矢印方向に作用した場合、この力Ｔは、仮１と板２と
の間の摩擦係数をμとすると、Ｔ≦μＦ ・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・・
・・（１）が成立する限り、板２に伝搬され、
Ｔ−Ｔ’ ・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・（２）の力が板２に作用
する。Here, when a dynamic force T acts on the plate 1 due to some reason in the direction of the arrow in the figure, this force T is expressed as T≦μF, where μ is the coefficient of friction between the temporary plate 1 and the plate 2.・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
...As long as (1) holds true, it will be propagated to plate 2, and T-T'...
・・・・・・・・・・・・・・・The force of (2) acts on the plate 2.
例えば、力Ｔが第８図（ａ）に示すような波形の振動力
であると、力Ｔ′ も同図（ｂ）に示すようにほぼ同じ
波形の力となって伝達してゆくことになる。For example, if the force T is a vibrating force with a waveform as shown in Figure 8(a), the force T' will also be transmitted as a force with an approximately same waveform as shown in Figure 8(b). Become.
（発明が解決しようとする課題）
いかなる構造物においても、動的な力の伝搬は、部品の
変形、損傷、割れ、あるいは金属疲労の蓄積につながる
等、有形、無形の損害を与える危険があるので、極力避
けることが望ましい。(Problem to be solved by the invention) In any structure, the propagation of dynamic forces has the risk of causing tangible and intangible damage, such as deformation, damage, and cracking of parts, or accumulation of metal fatigue. Therefore, it is desirable to avoid this as much as possible.
本発明はかかる点に着目してなされたもので、動的な力
の伝搬を効率的に防止できる衝撃吸収機能を備えた締結
ボルトを提供することを目的とするものである。The present invention has been made with attention to this point, and an object of the present invention is to provide a fastening bolt having a shock absorbing function that can efficiently prevent the propagation of dynamic force.
［発明の構成］
（課題を解決するための手段）
本発明の衝撃吸収締結ボルトは、筒体からなるボルトの
中空部に、エネルギー減衰用の固体、液体または粉体の
充填物を充填したことを特徴とするものである。[Structure of the Invention] (Means for Solving the Problems) The shock-absorbing fastening bolt of the present invention is characterized in that the hollow part of the cylindrical bolt is filled with a solid, liquid, or powder filler for energy attenuation. It is characterized by:
（作 用）
上述のように構成した本発明の衝撃吸収締結ボルトによ
れば、これによって締結された部品間における振動力の
伝搬を大幅に減少させることができる。(Function) According to the impact-absorbing fastening bolt of the present invention configured as described above, it is possible to significantly reduce the propagation of vibrational force between fastened parts.
（実施例）
次に、図直を参ルαしながら本発明の実施例を説明する
。なお、第７図におけると同一部分には同一符号を付し
てある。(Example) Next, an example of the present invention will be described with reference to the drawings. Note that the same parts as in FIG. 7 are given the same reference numerals.
第１図に示す本発明の実施例において、締結される板１
と板２との間には、両端近傍にネジ部を設けたリーマボ
ルト８が貰通している。このり一マボルトは、鋼や合金
鋼などからなる筒体つと、その中空部に充填した充填物
１０と、筒体９の上下端を封止する栓１１とから構或さ
れている。充填物１０としては鉛か使用され、栓１１は
筒体９に溶接等により固定されている。In the embodiment of the invention shown in FIG.
A reamer bolt 8 having threaded portions near both ends is inserted between the plate 2 and the plate 2 . This single bolt is composed of a cylindrical body made of steel or alloy steel, a filler 10 filled in the hollow part of the cylindrical body, and plugs 11 that seal the upper and lower ends of the cylindrical body 9. Lead is used as the filler 10, and the plug 11 is fixed to the cylindrical body 9 by welding or the like.
板１および２の透孔を貫通するリーマボルト８の下端に
は平座金５を介してナット１２がネジ込まれ、また、リ
ーマボルト８の上端には平座金５およびばね座金６を介
してナット１２がネジ込まれ、板１、２を締付けている
。A nut 12 is screwed into the lower end of the reamer bolt 8 passing through the holes in the plates 1 and 2 through a flat washer 5, and a nut 12 is screwed into the upper end of the reamer bolt 8 through a flat washer 5 and a spring washer 6. It is screwed in and tightens plates 1 and 2.
上記リーマボルト８は、ナット１２を締付けることによ
って引張力を生じ、この引張力が阪１、２間に接触力を
与える点は、前述の従来技術におけると同様であるが、
リーマボルト８が板１、２の孔と嵌合部を有している点
で相違している。The reamer bolt 8 generates a tensile force by tightening the nut 12, and this tensile force applies a contact force between the bolts 1 and 2, as in the prior art described above.
The difference is that the reamer bolt 8 has a fitting portion with the holes in the plates 1 and 2.
すなわち、板１に作用する動的な力Ｔは、り−マボルト
自身に作用する引張力Ｆと板間の摩擦係数μによる摩擦
力μＦと、リーマボルト自身のせん断力Ｑによって板２
に伝搬される。このリーマボルトのせん断力Ｑの伝搬は
ボルト自身の変形を伴うため、これを利用して減衰効果
を高めることができる。That is, the dynamic force T acting on the plate 1 is caused by the tensile force F acting on the reamer bolt itself, the friction force μF due to the friction coefficient μ between the plates, and the shear force Q of the reamer bolt itself.
is propagated to. Since the propagation of the shear force Q of the reamer bolt is accompanied by deformation of the bolt itself, this can be used to enhance the damping effect.
第２図（ａ）は、従来の締結ボルトで締結された２枚の
板の相対変位量と減衰力の関係を示すもので、図中、矢
印で示す軌跡のように、両者間には、ほぼ線形の関係が
あり、動的な力に対しては狭い閉ループを描く。この閉
ループで囲まれた面積が散逸エネルギーとなり、減衰を
与えることになる。Figure 2(a) shows the relationship between the relative displacement and damping force of two plates fastened together with conventional fastening bolts.As shown by the trajectory indicated by the arrow in the figure, there is a There is an almost linear relationship and a narrow closed loop for dynamic forces. The area surrounded by this closed loop becomes dissipated energy and provides attenuation.
第２図（ｂ）は本発明のりーマボルトについて第２図（
ａ）と同様の関係を示したもので、本発明の場合には、
リーマボルト内部の鉛がぜん断変形に対し粘弾性変形に
よりエネルギを吸収するため、軌跡は第２図（ａ）の場
合よりも広いヒステリシスの閉ループを描く。したがっ
て、本発明の衝撃吸収締結ボルトによれば、動的な力の
伝搬を強力に吸収することができる。Fig. 2(b) shows the reamer bolt of the present invention in Fig. 2(b).
This shows the same relationship as a), and in the case of the present invention,
Since the lead inside the reamer bolt absorbs energy through viscoelastic deformation in response to shear deformation, the trajectory draws a closed loop with wider hysteresis than in the case of FIG. 2(a). Therefore, according to the impact-absorbing fastening bolt of the present invention, the propagation of dynamic force can be strongly absorbed.
第３図（ａ）は本発明の衝撃吸収締結ボルトの減衰効果
を確認するための実験の概略を示すもので、２本の帯状
の板１３、１４を２本の供試ボルト１５で連結し、一端
を強固なクランプ１６にて固定した上、他端をインパル
スハンマー１７にてハンマリングし、応答変化を変位セ
ンサー１８にて計測した。FIG. 3(a) schematically shows an experiment to confirm the damping effect of the shock-absorbing fastening bolt of the present invention, in which two strip-shaped plates 13 and 14 were connected with two test bolts 15. One end was fixed with a strong clamp 16, and the other end was hammered with an impulse hammer 17, and the response change was measured with a displacement sensor 18.
第３図（ｂ）は上記ハンマリングに対する応答変化の比
を時間経過とともに計測した結果を示すもので、破線は
従来技術によるボルトを用いた場合を、実線は本発明の
ボルトを用いた場合をそれぞれ示している。FIG. 3(b) shows the results of measuring the ratio of the response change to the above-mentioned hammering over time, where the broken line represents the case when the conventional bolt was used, and the solid line represents the case when the bolt of the present invention was used. are shown respectively.
この図から明らかなように、本発明の衝撃吸収締結ボル
トによる場合には、大きな振動減衰効果が得られ、衝撃
力の伝搬も防止されている。As is clear from this figure, when using the shock absorbing fastening bolt of the present invention, a large vibration damping effect is obtained and the propagation of impact force is also prevented.
第４図は本発明の衝撃吸収締結ボルトの適用例を示すも
ので、板１と２との間には、テフロン板１つが挾み込ま
れている。この場合、前述の衝撃力を伝達する摩擦力と
リーマボルトのせん断力の内、摩擦力を低減させること
により、せん断力の分担が大きくなり、リーマボルトの
減衰効果が高まる。FIG. 4 shows an application example of the shock absorbing fastening bolt of the present invention, in which one Teflon plate is inserted between plates 1 and 2. In this case, by reducing the frictional force of the frictional force that transmits the above-mentioned impact force and the shearing force of the reamer bolt, the share of the shearing force becomes larger, and the damping effect of the reamer bolt increases.
第５図は板１と２の締結ボルトが複数個ある場合、これ
らの内のいくつかを本発明の衝撃吸収締結ボルト２０と
し、残りを従来技術のボルトとした例を示している。こ
のような組合わせとすることにより、従来ボルトの強度
と、本発明ボルトの減衰効果とを兼備させることもでき
る。FIG. 5 shows an example in which, when there are a plurality of fastening bolts for plates 1 and 2, some of them are used as the shock absorbing fastening bolts 20 of the present invention, and the rest are used as conventional bolts. By using such a combination, it is possible to have both the strength of the conventional bolt and the damping effect of the bolt of the present invention.
第６図は２本の回転軸２２と２３をそれぞれのフランジ
２４、２５で連結する回転軸のカップリングに本発明を
適用した例を示すもので、フランジ２４、２５を締結す
るボルトとして、本発明の衝撃吸収締結ボルト２０と、
従来技術のボルト２１が交互に使用されている。この実
施例においても、軸２２、２３に作用する衝撃的なトル
クをカップリング部で減衰させ、しかも適度の機械的強
度を維持することができる。FIG. 6 shows an example in which the present invention is applied to a rotating shaft coupling that connects two rotating shafts 22 and 23 with flanges 24 and 25, respectively. The shock absorbing fastening bolt 20 of the invention,
Prior art bolts 21 are used alternately. In this embodiment as well, it is possible to attenuate the impact torque acting on the shafts 22 and 23 at the coupling portion, and maintain appropriate mechanical strength.
なお、上記各実施例においては、リーマボルトの充填物
１０として鉛を使用した例につき述べたが、本発明はこ
れに限定されるものではなく、例えばゴムや樹脂などの
固体、グリースや曲などの液体、あるいは金属などの粉
体を使用しても同様の効果を得ることができる。In each of the above embodiments, lead is used as the filler 10 of the reamer bolt, but the present invention is not limited to this. For example, solid materials such as rubber and resin, grease, curved material, etc. A similar effect can be obtained by using liquid or powder such as metal.
［発明の効果］
上述のように、本発明の衝撃吸収締結ボルトによれば、
締結部品のある箇所に動的な力が作用しても、これを吸
収し、他の部品への伝搬を低減させることができる。[Effects of the Invention] As described above, according to the shock absorbing fastening bolt of the present invention,
Even if a dynamic force acts on a certain part of the fastening part, it can be absorbed and its propagation to other parts can be reduced.
したがって、衝突、爆発、地震などの突発的な現象や、
その他の衝撃的な力の作用に対して、部品群によって構
成される全体機器の機能の喪失を防ぐことができ、機器
の信頼性を向上させることができる。Therefore, sudden phenomena such as collisions, explosions, earthquakes, etc.
It is possible to prevent the loss of function of the entire device constituted by the group of parts against the action of other shocking forces, and it is possible to improve the reliability of the device.
第１図は本発明の衝撃吸収締結ボルトの横造を例示する
縦断面図、第２図はボルトに加わる力と変位量の関係を
示すグラフで、同図（ａ）は従来技術のボルトの場合を
、同図（ｂ）は本発明のボルトの場合を示している。
第３図は本発明の衝撃吸収締結ボルトの効果を確認する
ためのもので、同図（ａ）は実験装置の概略構戊図、同
図（ｂ）はその実験結果を示している。
第４図ないし第６図はそれぞれ本発明の衝撃吸収締結ボ
ルトの適用例を示す縦断面図、展開図、または斜視図で
あり、第７図は従来技術によるボルトの構造を例示する
縦断面図、第８図は従来技術による締結体の応答波形を
示すグラフである。
１、２・・・・・・板
３・・・・・・ボルト
４・・・・・・ねじ部
５・・・・・・平座金
６・・・・・・ばね座金
７・・・・・・接触部
８・・・・・・リーマボルト
９・・・・・・筒体
１０・・・・・・充填物（鉛）
１１・・・・・・栓
１２・・・・・・ナット
１３、１４・・・・・・帯板
１５・・・・・・供試ボルト
１６・・・・・・クランプ
１７・・・・・・インパルスハンマー
１８・・・・・・変位センサー
１９・・・・・・テフロン阪
２０・・・・・・本発明のボルト
２１・・・・・・従来技術のボルト
２２、２３・・・軸
２４、２５・・・フランジFig. 1 is a vertical cross-sectional view illustrating the horizontal structure of the shock absorbing fastening bolt of the present invention, Fig. 2 is a graph showing the relationship between the force applied to the bolt and the amount of displacement, and Fig. 2 (a) is a graph showing the relationship between the force applied to the bolt and the amount of displacement. FIG. 3(b) shows the case of the bolt of the present invention. FIG. 3 is for confirming the effect of the shock-absorbing fastening bolt of the present invention; FIG. 3(a) is a schematic diagram of the experimental apparatus, and FIG. 3(b) shows the experimental results. 4 to 6 are a longitudinal sectional view, a developed view, or a perspective view, respectively, showing application examples of the shock absorbing fastening bolt of the present invention, and FIG. 7 is a longitudinal sectional view illustrating the structure of the bolt according to the prior art. , FIG. 8 is a graph showing a response waveform of a fastening body according to the prior art. 1, 2...Plate 3...Bolt 4...Threaded portion 5...Flat washer 6...Spring washer 7... ... Contact portion 8 ... Reamer bolt 9 ... Cylindrical body 10 ... Filler (lead) 11 ... Plug 12 ... Nut 13 , 14... Strip plate 15... Test bolt 16... Clamp 17... Impulse hammer 18... Displacement sensor 19... ... Teflon plate 20 ... Bolts of the present invention 21 ... Bolts of the prior art 22, 23 ... Shafts 24, 25 ... Flanges
Claims (1)
体、液体または粉体の充填物を充填したことを特徴とす
る衝撃吸収締結ボルト。A shock-absorbing fastening bolt characterized in that the hollow part of the cylindrical bolt is filled with a solid, liquid, or powder filler for energy attenuation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14518589A JPH0314902A (en) | 1989-06-09 | 1989-06-09 | Impact absorbing tightening bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14518589A JPH0314902A (en) | 1989-06-09 | 1989-06-09 | Impact absorbing tightening bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0314902A true JPH0314902A (en) | 1991-01-23 |
Family
ID=15379393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14518589A Pending JPH0314902A (en) | 1989-06-09 | 1989-06-09 | Impact absorbing tightening bolt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0314902A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9274680B2 (en) | 2005-09-08 | 2016-03-01 | Thomson Licensing | Method of selection of a button in a graphical bar, and receiver implementing the method |
-
1989
- 1989-06-09 JP JP14518589A patent/JPH0314902A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9274680B2 (en) | 2005-09-08 | 2016-03-01 | Thomson Licensing | Method of selection of a button in a graphical bar, and receiver implementing the method |
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