JP4018200B2 - damper - Google Patents

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JP4018200B2
JP4018200B2 JP19913097A JP19913097A JP4018200B2 JP 4018200 B2 JP4018200 B2 JP 4018200B2 JP 19913097 A JP19913097 A JP 19913097A JP 19913097 A JP19913097 A JP 19913097A JP 4018200 B2 JP4018200 B2 JP 4018200B2
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Prior art keywords
groove
damper
protrusion
braking force
protrusions
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JPH1130261A (en
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孝 武者
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Nifco Inc
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Nifco Inc
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Priority to TW086220862U priority patent/TW337320U/en
Priority to KR1019970076929A priority patent/KR100232562B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/12Devices with one or more rotary vanes turning in the fluid any throttling effect being immaterial, i.e. damping by viscous shear effect only
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32Details
    • F16F9/3271Assembly or repair
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2224/00Materials; Material properties
    • F16F2224/04Fluids

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は、回転可能に組み合わされた第一、第二の部材の対向面間に封入した粘性液体により、当該回転に制動を与えるダンパの改良に関する。
【0002】
【従来の技術】
扉などの一方の部材と、この一方の部材を移動可能に組み付けた前記扉により塞がれる開口を備えた本体などの他方の部材とにおいて、かかる一方の部材の前記移動に制動を付与するため、かかる一方の部材側に組み付けられるなどして当該一方の部材の移動に伴って回転又は相対的に回転される第一の部材と、かかる他方の部材側に組み付けられるなどして前記一方の部材の移動に伴って回転又は相対的に回転される第二の部材とを有するダンパが用いられている。
【0003】
かかるダンパにあっては、前記第一の部材と第二の部材とに、円環状をなす突部と当該突部を収める円環状をなす溝とが設けてあり、かかる突部をかかる溝に収めた状態で、前記回転がなされるようにしてある。また、かかる第一の部材と第二の部材の対向面間、特に、前記突部の外面と前記溝の内面との間の隙間には、粘性液体が封入してあり、この粘性液体により前記回転に制動を与え、ダンパとして機能させている。また、かかるダンパにあっては、組立作業の簡素化、軽量化、部品点数の軽減などの要請から、近年特に、前記対向面間に封入した粘性液体の粘性を利用して、前記突部に前記溝を収めるように前記第一の部材と第二の部材を組み合わせることをもってその組み立てをなすタイプのものが多く利用されている。
【0004】
図12にかかるタイプのダンパの要部断面を示す。同図中、符号100は第一の部材、101は第二の部材、102は円環状をなす溝、103は円環状をなす突部、104は粘性液体である。
【0005】
【発明が解決しようとする課題】
しかるに、かかるダンパにあっては、前記第一の部材100と第二の部材101とは前記組み合わせにより組み立てられているに過ぎないため、かかるダンパの使用に伴って前記第一の部材100と第二の部材101とがその回転軸線方向に沿って離れ出す向きに移動される場合があり、こうした場合にダンパの制動力を大きく低下させてしまう不都合があった。
【0006】
すなわち、この種のダンパにおける前記制動力は一般に、前記対向面間の間隔、特に前記突部103の外面と前記溝102の内面間の間隔が広がるほど小さくなることが認められるところ、前記第一の部材100と第二の部材101とが前記のように離れ出されると前記突部103の側面103aと前記溝102の溝側面102aとの間の間隔は変化しないが、当該突部103の先端面103bと当該溝102の溝底面102bとの間の間隔が広がり、この結果、かかる先端面103bと溝底面102bとによって得られていた制動力が喪失され、ダンパ全体の制動力の低下を生じさせる。(図13)
【0007】
もちろん、前記第一の部材100と第二の部材101とを、前記離れ出す向きへの移動を生じさせないように格別の手段により組み付ければかかる不都合は生じないが、構造の複雑化に伴う成形などの困難性や、組立手間の増加、部品点数の増大などを招くことから、こうした格別の手段を要することなく前記不都合を防止する手法が望まれるところであった。
【0008】
そこでこの発明は、この種のダンパの制動力を、簡易な構造をもって、大きく減少させないようにすることを目的とする。
【0009】
【課題を解決するための手段】
前記目的を達成するために、この発明ではダンパが、以下の(1)〜(5)の構成を備えたものとした。
(1) 円環状をなす溝と当該溝に収まる円環状をなす突部とをそれぞれ有し、当該溝に当該突部を収めて、回転可能に組み合わされる第一及び第二の部材と、(2)当該第一の部材と第二の部材との対向面間に封入される粘性液体とを有し、(3)前記第一の部材の第二の部材に対する回転又は相対的な回転に当該粘性液体による制動を与えるダンパであって、
(4)前記対向面の少なくとも一部を構成する前記溝と前記突部の面のうち、前記溝の溝底にある面と前記突部の先端にある面との間の間隔が、当該溝の溝側面と当該突部の側面との間の間隔よりも広くなるように構成してあり、
ダンパ全体の制動力に対する前記溝の溝底にある面と前記突部の先端にある面との間で生じる制動力の占める割合が当初より少なくなるようにしてあると共に、
(5)前記突部の先端にある面と前記溝の溝底にある面の双方又はいずれか一方に円環状をなす凹部が形成されていることを特徴とするダンパ。
【0010】
かかる構成によれば、前記第一部材と第二の部材とを、前記溝に前記凹部が収まるように、前記粘性液体を前記対向面に塗付などした状態で当該第一の部材と第二の部材を単純に組み合わせることにより、前記円環状をなす溝ないしは突部の当該円の円心を通る線分を回転軸線として、前記第一の部材の第二の部材に対する回転又は相対的な回転に前記粘性液体による制動を付与できるようにすることができる。
【0011】
かかる制動をなす制動力は、前記第一の部材の前記対向面と前記第二の部材の対向面との間の間隔が狭くなればなるほど大きくなり、かかる間隔が広くなればなるほど小さくなることが認められる。
【0012】
したがって、前記(4)の構成を採用することにより、ダンパにおける前記制動力を、前記溝の溝側面と前記突部の側面との間で主として発生させ、当該溝の溝底にある面と当該突部の先端にある面との間でのかかる制動力の発生を少なくさせることができる。
【0013】
この結果、この発明にかかるダンパによれば、このダンパの使用にあたって、前記第一の部材と第二の部材とが、前記回転の回転軸線方向に沿った向きに互いに離れ出すように移動され、前記溝の溝底にある面と前記突部の先端にある面との間の間隔が広がっても、当初よりこの間隔が広げられた面間のでの制動力がダンパ全体の制動力に占める割合を少なくしていることから、ダンパ全体の制動力が大きく低下することがなく、このような移動が生じてもダンパの制動力を要求される大きさに近い状態に維持することができる。
【0014】
【発明の実施の形態】
以下、図1ないし図11に示されるこの発明の典型的な実施の形態の一つについて、説明する。
【0015】
なお、ここで図1は、この実施の形態にかかるダンパの組み立て前の構成を理解し易いように、連結片50により一体に連結された第一の部材10と第二の部材20とを斜視の状態として示している。また、図2ないし図4は、図1の状態からダンパを組み立てる過程を理解し易いように、前記第一の部材10と第二の部材20および前記連結片50を、それぞれ斜視の状態として示している。
【0016】
また、図5は、図1の状態にあるダンパの構成体を、一面側から見た状態で、また、図6は、一部を断面にして側方から見た状態で、また、図7は、第一の部材10を縦断面の状態として、それぞれ示している。
【0017】
また、図8は、組み立てられたダンパの構成を理解し易いように、当該ダンパを縦断面の状態として、また、図9ないし図11は、前記第一の部材10と第二の部材20とにそれぞれ設けられ、かつ、個別に収まり合う突部12・23と溝13・22とにおける突部12・23の先端にある面41bと溝13・22の溝底にある面40bとの間の間隔を広く構成した各例を、それぞれ理解し易いように、ダンパの要部を断面にして示している。(かかる図9ないし図11においては、第二の部材20におけるギア状突部25の一部を省略して、かかる第二の部材20を示している。)
【0018】
この実施の形態にかかるダンパは、軸突部11を一面側略中心から、当該面に対し直交する向きに突き出させた円盤状をなす第一の部材10と、この軸突部11の収まるめくら穴状をなす軸穴21を一面側から有する円盤状をなす第二の部材20とを主体に構成してある。かかる第一の部材10の軸突部11の先端には、等間隔に、四つの突起11a、11a…が形成してある。
【0019】
そして、かかる第一の部材10は、前記軸突部11を前記第二の部材20の軸穴21に回転可能に収め入れた状態で第二の部材20に組み合わされる。したがって、かかる第一の部材10は、当該軸突部11の軸線を回転中心xとして、第二の部材20に対して回転又は相対的に回転可能とされる。
【0020】
また、第一の部材10における前記軸突部11が設けられている側には、前記回転中心xを円心とする円環状をなす三つの突部12、12…が、隣り合う突部12との間に略等しい間隔を開けるように設けてある。すなわち、この実施の形態にあっては、各突部12、12…は、前記回転中心xからの半径を異ならせる同心円の円弧にそれぞれ沿って設けてある。また、かかる各突部12、12…のうち、もっとも内側に位置される突部12と前記軸突部11との間にも、前記各突部12、12…間の間隔とほぼ等しい間隔が設けてある。この結果、この実施の形態にあっては、前記軸突部11ともっとも内側に位置される突部12との間、および隣り合う前記突部12の間に、円環状をなす溝13がそれぞれ形成されている。
【0021】
また、第二の部材20における前記軸穴21が設けられている側には、前記回転中心xを円心とする円環状をなす二つの溝22、22が、間隔を開けて設けてある。すなわち、この実施の形態にあっては、かかる二つの溝22、22は、前記回転中心xからの半径を異ならせる同心円の円弧にそれぞれ沿って設けてある。また、かかる二つの溝22、22のうち、内側に位置される溝22と前記軸穴21との間にも、前記二つの溝22、22間の間隔とほぼ等しい間隔が設けてある。この結果、この実施の形態にあっては、前記軸穴21と内側に位置される溝22との間、および、前記二つの溝22、22の間に、円環状をなす突部23がそれぞれ形成されている。
【0022】
そして、この実施の形態にあっては、前記第一の部材10に設けられた突部12および第二の部材20に設けられた突部23の肉厚よりも、当該第一の部材10に設けられた溝13および第二の部材20に設けられた溝22の溝幅がやや大きくなるように構成してある。
【0023】
また、前記第一の部材10の軸突部11を前記第二の部材20の軸穴21に収め入れた組み合わせ状態において、より詳細には、当該軸穴21の穴底に当該軸突部11の先端部を突き当てる位置まで当該軸穴21に当該軸突部11を差し入れた状態において、かかる第一の部材10の各突部12間にある溝13にそれぞれ、かかる第二の部材20に設けられた各突部23が個別に収まり、また、かかる第一の部材10の各突部12のうち、もっとも外側にある突部12を除く突部12がそれぞれ、かかる第二の部材20に設けられた二つの溝22、22に個別に収まる構成としてある。
【0024】
そして、この実施の形態においては、このように組み合わされる第一の部材10と第二の部材20における対向面M、すなわち、前記軸突部11の外面と前記軸穴21の内面および前記各突部12・23の外面と前記各溝13・22の内面との間に形成される隙間yに、粘性オイルなどの粘性液体30が封入される構成としてある。
【0025】
より詳細には、かかる粘性液体30は、前記第一の部材10と第二の部材20を前記のように組み合わせるに先立って、当該両部材10、20の一方又は双方の前記組み合わせ側に塗付しておくことにより、前記隙間yに入り込まされる。この実施の形態にあっては、前記組み合わせ状態において、前記第一の部材10の各突部12のうちもっとも外側にある突部12の内側面が、前記第二の部材20のもっとも外側にある突部23の外側面に向き合い、かつ、かかるもっとも外側にある第一の部材10の突部12の先端面に第二の部材20の側縁部24が向き合うようにしてあることから、前記隙間yに入れ込まれた粘性液体30は当該隙間yから漏れ出し難く、かかる隙間yに当該粘性液体30は実質的に封入された状態となる。
【0026】
この結果、この実施の形態によれば、前記回転中心xを中心として第二の部材20に対し回転又は相対的に回転される第一の部材10の当該回転に、前記粘性液体30による制動を付与させることができ、ダンパとして機能させることができる。すなわち、相互に移動可能に組み付けられる二つの部材の一方に、前記第一の部材10を組み付けるなどし、かつ、かかる二つの部材の他方に前記第二の部材20を組み付けるなどすることにより、かかる二つの部材の移動にこの実施の形態にかかるダンパの前記制動を付与することができる。
【0027】
この実施の形態にあっては特に、前記第一の部材10の向き合った一対の側部に、ネジなどの取付穴14aを有し、かつ、外方に張り出した取付板部14を設けると共に、前記第二の部材20における前記軸穴21が設けられている側と反対の側に、前記回転中心xとギアの中心を略同じくするギア状突部25を設けており、前記取付板部14により一方の部材に第一の部材10を取り付け、かつ、他方の部材に設けたラックなどを前記第二の部材20のギア状突部25に噛み合わせることにより、これらの部材の前記移動に対し前記制動を付与できるようにしてある。
【0028】
この実施の形態にあってはまた、前記粘性液体30の封入される隙間yを構成する前記対向面Mのうち、前記溝13・22の溝底にある面40bと前記突部12・23の先端にある面41bとの間の間隔が、当該溝13・22の溝側面40aと当該突部12・23の側面41aとの間の間隔よりも広くなるように構成してある。
【0029】
この結果、この実施の形態にあっては、ダンパにおける前記制動をする制動力を、前記溝13・22の溝側面40aと前記突部12・23の側面41aとの間で主として発生させ、当該溝13・22の溝底にある面40bと当該突部12・23の先端にある面41bとの間でのかかる制動力の発生を少なくさせることができる。
【0030】
かかる構成により、この実施の形態にかかるダンパにあっては、このダンパの使用にあたって、前記第一の部材10と第二の部材20とが、前記軸突部11の軸線方向x’に沿った向きに互いに離れ出すように移動され、前記溝13・22の溝底にある面40bと前記突部12・23の先端にある面41bとの間の間隔が広がっても、当初よりこの間隔が広げられた面間のでの制動力がダンパ全体の制動力に占める割合を少なくしていることから、ダンパ全体の制動力が大きく低下することがなく、このような移動が生じてもダンパの制動力を要求される大きさに近い状態に維持することができる。
【0031】
また、前記溝13・22の溝底にある面40bと前記突部12・23の先端にある面41bとの間をもって、前記第一の部材10の回転又は相対的な回転に伴って当該溝13・22の溝側面40aと当該突部12・23の側面41aとの間で圧縮される粘性液体30の逃げ出しを許容することができ、この逃げ出しの許容により、かかる粘性液体30が、かかる回転に伴って前記第一の部材10と第二の部材20との間から、より具体的には前記第一の部材10のもっとも外側にある突部12と第二の部材20の外側の突部23との間から、漏れ出す事態が生じ難いものとされ、この結果、経時的に当該粘性液体30の量が不足してダンパにおける前記制動力が低下してしまうことが少ないものとされる。
【0032】
前記溝13・22の溝底にある面40bと前記突部12・23の先端にある面41bとの間の間隔yを、当該溝13・22の溝側面40aと当該突部12・23の側面41aとの間の間隔より広くすることは、前記軸突部11の先端部が前記軸穴21の底面に突き当たった組み合わせ位置において、かかる間隔を広くするように、前記突部12・23の突き出し寸法および前記溝13・22の深さを設定しておくことにより確保することができる。
【0033】
また、前記間隔yを広くすることは、図1ないし図9に示されるように、かかる突部12・23の先端にある面41bに円環状をなす当該突部12・23に沿った円環状をなす凹部42を形成することにより確保することができる。このように構成した場合、かかる突部12・23の突き出し寸法および溝13・22の深さを変えることなく、しかも、ダンパの回転軸線方向x’の寸法を必要以上に増加させずに、かかる間隔yを広くすることができる。
【0034】
また、前記間隔yを広くすることは、図10に示されるように、前記溝13・22の溝底にある面40bに円環状をなす当該溝13・22に沿った凹部42を形成することにより確保することができる。
【0035】
また、前記間隔yを広くすることは、図11に示されるように、前記突部12・23の先端にある面41bと前記溝13・22の溝底にある面40bの双方に前記円環状をなす凹部42を形成することにより確保することができる。
【0036】
なお、この実施の形態にあっては、前記第一の部材10の取付板部14と前記第二の部材20の側部とを薄肉の連結片50をもって連結させた状態で、プラスチック材料をもって両部材を同時にかつ一体に成形できるようにしてある。(図1、図5、図6)このように一体に成形された第一の部材10と第二の部材20とは、第一の部材10の軸突部11が設けられている側と第二の部材20の軸穴21が設けられている側とが同じ側を向くように構成され、(図1、図6)前記連結片50の一端部との連接部51を折り曲げ、かつ、この折り曲げ位置を中心に第一の部材10又は第二の部材20を他方の部材に近付ける向きに回動させることにより、前記軸突部11の側と軸穴21の側とを向かい合わせることができ、(図2)この軸穴21への軸突部11の収め入れによる前記第一の部材10と第二の部材20との組み合わせをスムースになすことができるようにしてある。(図3)このように組み合わせる過程において前記連結片50の一端部との連接部51を破断させると共に粘性液体30を前記のように塗布し、かつ、組み合わせ後に当該連結片50の他端部との連接部51を破断させることにより、かかる連結片50を取り除いて、ダンパの組み立てが完了される。(図3、図4)
【0037】
【発明の効果】
この発明にかかるダンパによれば、このダンパの使用にあたって、回転可能に組み合わされる前記第一の部材と第二の部材とが、当該回転の回転軸線方向に沿った向きに互いに離れ出すように移動され、前記溝の溝底にある面と前記突部の先端にある面との間の間隔が広がっても、当初よりこの間隔が広げられた面間のでの制動力がダンパ全体の制動力に占める割合を少なくしていることから、ダンパ全体の制動力が大きく低下することがなく、簡易な構造をもってこのような移動が生じてもダンパの制動力を要求される大きさに近い状態に維持することができる。
【図面の簡単な説明】
【図1】組み立て前のダンパ構成体を示す斜視図
【図2】ダンパ組み立ての過程を示す斜視図
【図3】ダンパ組み立ての過程を示す斜視図
【図4】ダンパ組み立ての過程を示す斜視図
【図5】組み立て前のダンパ構成体を示す平面図
【図6】組み立て前のダンパ構成体を示す要部破断側面図
【図7】図5におけるA−A線断面図
【図8】ダンパの断面図
【図9】ダンパの要部断面図
【図10】ダンパの要部断面図
【図11】ダンパの要部断面図
【図12】従来例を示す断面図
【図13】従来例を示す断面図
【符号の説明】
10 第一の部材
12 突部
13 溝
20 第二の部材
22 溝
23 突部
30 粘性液体
M 対向面
S 隙間
40a 溝側面
40b 溝底にある面
41a 突部の側面
41b 突部の先端にある面
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a damper that applies braking to the rotation by a viscous liquid sealed between opposing surfaces of first and second members that are rotatably combined.
[0002]
[Prior art]
In one member, such as a door, and the other member, such as a main body having an opening that is closed by the door, in which the one member is movably assembled, to apply braking to the movement of the one member A first member that is rotated or relatively rotated along with the movement of the one member and the one member is assembled to the other member side. The damper which has the 2nd member rotated or rotated relatively with the movement of is used.
[0003]
In such a damper, the first member and the second member are provided with an annular projecting portion and an annular groove for housing the projecting portion, and the projecting portion is formed in the groove. The rotation is performed in the retracted state. Further, a viscous liquid is sealed between the opposing surfaces of the first member and the second member, in particular, a gap between the outer surface of the protrusion and the inner surface of the groove. The brake is applied to the rotation to function as a damper. In addition, in such a damper, due to demands for simplifying assembly work, reducing weight, reducing the number of parts, etc., in recent years, in particular, the viscosity of the viscous liquid sealed between the opposed surfaces has been used for the protrusion. Many types are used which are assembled by combining the first member and the second member so as to accommodate the groove.
[0004]
FIG. 13 shows a cross section of the main part of a damper of the type according to FIG. 12. In the figure, reference numeral 100 is a first member, 101 is a second member, 102 is an annular groove, 103 is an annular projection, and 104 is a viscous liquid.
[0005]
[Problems to be solved by the invention]
However, in such a damper, since the first member 100 and the second member 101 are only assembled by the combination, the first member 100 and the second member 101 are used together with the use of the damper. There is a case where the second member 101 is moved in a direction to move away along the rotational axis direction. In such a case, there is a disadvantage that the braking force of the damper is greatly reduced.
[0006]
That is, it is recognized that the braking force in this type of damper generally decreases as the distance between the opposing surfaces, particularly the distance between the outer surface of the protrusion 103 and the inner surface of the groove 102 increases. When the member 100 and the second member 101 are separated from each other as described above, the distance between the side surface 103a of the projection 103 and the groove side surface 102a of the groove 102 does not change, but the tip of the projection 103 The distance between the surface 103b and the groove bottom surface 102b of the groove 102 is widened. As a result, the braking force obtained by the tip surface 103b and the groove bottom surface 102b is lost, resulting in a decrease in the braking force of the entire damper. Let (Fig. 13)
[0007]
Of course, such inconvenience does not occur if the first member 100 and the second member 101 are assembled by special means so as not to cause the movement in the separating direction. Therefore, there is a demand for a method for preventing the above inconvenience without requiring such special means.
[0008]
Therefore, an object of the present invention is to prevent the braking force of this type of damper from being greatly reduced with a simple structure.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, a damper has the following configurations (1) to (5).
(1) First and second members that each have an annular groove and an annular protrusion that fits in the groove, and the protrusion is housed in the groove and is rotatably combined; 2) having a viscous liquid sealed between opposing surfaces of the first member and the second member, and (3) the rotation of the first member relative to the second member or relative rotation A damper that provides braking by a viscous liquid,
(4) Of the surfaces of the groove and the protrusion that constitute at least a part of the opposing surface, the distance between the surface at the groove bottom of the groove and the surface at the tip of the protrusion is the groove. It is configured to be wider than the interval between the groove side surface and the side surface of the protrusion,
The ratio of the braking force generated between the surface at the bottom of the groove and the surface at the tip of the protrusion with respect to the braking force of the entire damper is set to be smaller than the original,
(5) A damper having an annular recess formed in both or one of the surface at the tip of the protrusion and the surface at the groove bottom of the groove .
[0010]
According to this configuration, the first member and the second member are coated with the viscous liquid on the facing surface so that the concave portion is accommodated in the groove. By simply combining the members, the rotation or relative rotation of the first member with respect to the second member is performed with the line segment passing through the center of the circle of the annular groove or projection as the rotation axis. It is possible to apply braking by the viscous liquid.
[0011]
The braking force for performing such braking increases as the distance between the facing surface of the first member and the facing surface of the second member decreases, and decreases as the distance increases. Is recognized.
[0012]
Therefore, by adopting the configuration of (4), the braking force in the damper is mainly generated between the groove side surface of the groove and the side surface of the protrusion, and the surface on the groove bottom of the groove and the surface It is possible to reduce the occurrence of such a braking force with the surface at the tip of the protrusion.
[0013]
As a result, according to the damper according to the present invention, when the damper is used, the first member and the second member are moved away from each other in the direction along the rotational axis direction of the rotation, Even if the space between the surface at the groove bottom of the groove and the surface at the tip of the protrusion is widened, the ratio of the braking force between the surfaces with the space widened from the beginning to the braking force of the entire damper Therefore, the braking force of the entire damper is not greatly reduced, and even when such movement occurs, the braking force of the damper can be maintained in a state close to the required magnitude.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, one of the typical embodiments of the present invention shown in FIGS. 1 to 11 will be described.
[0015]
Here, FIG. 1 is a perspective view of the first member 10 and the second member 20 that are integrally connected by the connecting piece 50 so that the configuration before the assembly of the damper according to this embodiment can be easily understood. Shown as a state. 2 to 4 show the first member 10, the second member 20, and the connecting piece 50 as perspective views so that the process of assembling the damper can be easily understood from the state shown in FIG. ing.
[0016]
FIG. 5 shows the structure of the damper in the state shown in FIG. 1 as viewed from one side, FIG. 6 shows a part in cross-section as viewed from the side, and FIG. These show the first member 10 as a longitudinal section.
[0017]
Further, FIG. 8 shows the damper in a longitudinal section so that the structure of the assembled damper can be easily understood. FIGS. 9 to 11 show the first member 10 and the second member 20. Between the surface 41b at the tip of the protrusions 12 and 23 and the surface 40b at the groove bottom of the grooves 13 and 22, respectively. In order to make it easy to understand each example having a wide interval, the main part of the damper is shown in cross section. (In FIGS. 9 to 11, the second member 20 is shown by omitting a part of the gear-shaped protrusion 25 of the second member 20.)
[0018]
The damper according to this embodiment includes a first member 10 having a disc shape in which a shaft protrusion 11 is protruded from a substantially center of one surface side in a direction orthogonal to the surface, and a blind in which the shaft protrusion 11 is accommodated. It is mainly composed of a disk-shaped second member 20 having a hole-shaped shaft hole 21 from one side. Four protrusions 11a, 11a,... Are formed at equal intervals on the tip of the shaft protrusion 11 of the first member 10.
[0019]
The first member 10 is combined with the second member 20 in a state where the shaft protrusion 11 is rotatably accommodated in the shaft hole 21 of the second member 20. Therefore, the first member 10 can be rotated or relatively rotated with respect to the second member 20 with the axis of the shaft protrusion 11 as the rotation center x.
[0020]
Further, on the side of the first member 10 on which the shaft protrusion 11 is provided, three protrusions 12, 12... Having an annular shape with the rotation center x as the center are adjacent protrusions 12. Are provided so as to have a substantially equal interval between them. That is, in this embodiment, each of the protrusions 12, 12,... Is provided along a concentric circular arc having a different radius from the rotation center x. Further, among the protrusions 12, 12..., An interval substantially equal to the interval between the protrusions 12, 12. It is provided. As a result, in this embodiment, the annular grooves 13 are formed between the shaft protrusion 11 and the innermost protrusion 12 and between the adjacent protrusions 12, respectively. Is formed.
[0021]
In addition, on the side of the second member 20 where the shaft hole 21 is provided, two annular grooves 22 and 22 having an annular center around the rotation center x are provided at an interval. That is, in this embodiment, the two grooves 22 and 22 are provided along concentric circular arcs having different radii from the rotation center x. Of these two grooves 22, 22, an interval substantially equal to the interval between the two grooves 22, 22 is also provided between the groove 22 positioned inside and the shaft hole 21. As a result, in this embodiment, there are annular projections 23 between the shaft hole 21 and the groove 22 positioned inside, and between the two grooves 22 and 22, respectively. Is formed.
[0022]
And in this embodiment, the thickness of the projection 12 provided on the first member 10 and the thickness of the projection 23 provided on the second member 20 is greater than the thickness of the first member 10. The groove width of the groove 13 provided and the groove 22 provided in the second member 20 is configured to be slightly larger.
[0023]
In the combined state in which the shaft protrusion 11 of the first member 10 is housed in the shaft hole 21 of the second member 20, more specifically, the shaft protrusion 11 is formed on the bottom of the shaft hole 21. In the state where the shaft protrusion 11 is inserted into the shaft hole 21 to the position where the tip of the first member 10 is abutted, the groove 13 between the protrusions 12 of the first member 10 is respectively connected to the second member 20. The provided protrusions 23 are individually accommodated, and among the protrusions 12 of the first member 10, the protrusions 12 except the outermost protrusion 12 are respectively connected to the second member 20. The two grooves 22 and 22 are provided separately.
[0024]
In this embodiment, the opposing surfaces M of the first member 10 and the second member 20 that are combined in this way, that is, the outer surface of the shaft protrusion 11, the inner surface of the shaft hole 21, and the protrusions. A viscous liquid 30 such as viscous oil is enclosed in a gap y formed between the outer surface of the portions 12 and 23 and the inner surfaces of the grooves 13 and 22.
[0025]
More specifically, prior to combining the first member 10 and the second member 20 as described above, the viscous liquid 30 is applied to one or both of the members 10 and 20 on the combination side. As a result, the gap y is entered. In this embodiment, in the combined state, the inner surface of the projection 12 that is the outermost of the projections 12 of the first member 10 is the outermost of the second member 20. Since the side edge 24 of the second member 20 faces the outer surface of the protrusion 23 and the front end surface of the protrusion 12 of the outermost first member 10 faces the gap, the gap The viscous liquid 30 introduced into y is unlikely to leak from the gap y, and the viscous liquid 30 is substantially enclosed in the gap y.
[0026]
As a result, according to this embodiment, braking by the viscous liquid 30 is applied to the rotation of the first member 10 rotated or relatively rotated with respect to the second member 20 around the rotation center x. It can be given and can function as a damper. That is, the first member 10 is assembled to one of the two members that are movably assembled with each other, and the second member 20 is assembled to the other of the two members. The braking of the damper according to this embodiment can be applied to the movement of the two members.
[0027]
Particularly in this embodiment, the pair of side portions of the first member 10 are provided with mounting holes 14a such as screws, and mounting plate portions 14 projecting outward are provided. A gear-like protrusion 25 having substantially the same center as the rotation center x and the center of the gear is provided on the side opposite to the side where the shaft hole 21 is provided in the second member 20. By attaching the first member 10 to one member and engaging the rack or the like provided on the other member with the gear-like protrusion 25 of the second member 20, the movement of these members is prevented. The braking can be applied.
[0028]
Also in this embodiment, of the facing surface M constituting the gap y in which the viscous liquid 30 is sealed, the surface 40b at the groove bottom of the grooves 13 and 22 and the protrusions 12 and 23 The space between the front surface 41b is configured to be wider than the space between the groove side surface 40a of the grooves 13 and 22 and the side surface 41a of the protrusions 12 and 23.
[0029]
As a result, in this embodiment, the braking force for braking the damper is mainly generated between the groove side surface 40a of the grooves 13 and 22 and the side surface 41a of the protrusions 12 and 23, and Generation of such braking force between the surface 40b at the groove bottom of the grooves 13 and 22 and the surface 41b at the tip of the protrusions 12 and 23 can be reduced.
[0030]
With this configuration, in the damper according to this embodiment, when the damper is used, the first member 10 and the second member 20 are along the axial direction x ′ of the shaft protrusion 11. Even if the distance between the surface 40b at the groove bottom of the grooves 13 and 22 and the surface 41b at the tip of the protrusions 12 and 23 is increased, the distance is increased from the beginning. Since the ratio of the braking force between the expanded surfaces to the braking force of the entire damper is reduced, the braking force of the entire damper is not greatly reduced. The power can be kept close to the required size.
[0031]
Further, between the surface 40b at the groove bottom of the grooves 13 and 22 and the surface 41b at the tip of the protrusions 12 and 23, the groove is rotated as the first member 10 is rotated or relatively rotated. It is possible to allow escape of the viscous liquid 30 compressed between the groove side surfaces 40a of the projections 13 and 22 and the side surfaces 41a of the protrusions 12 and 23. By allowing the escape, the viscous liquid 30 is allowed to rotate. Accordingly, between the first member 10 and the second member 20, more specifically, the outermost protrusion 12 of the first member 10 and the outer protrusion of the second member 20. As a result, the amount of the viscous liquid 30 is insufficient with time, and the braking force in the damper is less likely to decrease.
[0032]
The distance y between the surface 40b at the groove bottom of the grooves 13 and 22 and the surface 41b at the tip of the protrusions 12 and 23 is set to the distance between the groove side surface 40a of the grooves 13 and 22 and the protrusions 12 and 23. The distance between the side surface 41a and the side surface 41a is larger than the distance between the protrusions 12 and 23 so as to increase the distance at the combined position where the tip of the shaft protrusion 11 abuts against the bottom surface of the shaft hole 21. This can be ensured by setting the protruding dimension and the depth of the grooves 13 and 22.
[0033]
Further, as shown in FIGS. 1 to 9, the interval y is widened by forming an annular shape along the protrusions 12 and 23 that form an annular shape on the surface 41b at the tip of the protrusions 12 and 23, as shown in FIGS. This can be ensured by forming the concave portion 42 forming the following. In the case of such a configuration, the protrusions 12 and 23 are not projected and the depths of the grooves 13 and 22 are not changed, and moreover, the dimensions in the rotational axis direction x ′ of the damper are not increased more than necessary. The interval y can be widened.
[0034]
Further, to widen the distance y, as shown in FIG. 10, a concave portion 42 is formed along the grooves 13 and 22 forming an annular shape on the surface 40b at the groove bottom of the grooves 13 and 22, as shown in FIG. Can be secured.
[0035]
Further, as shown in FIG. 11, the interval y is widened on both the surface 41 b at the tip of the protrusions 12 and 23 and the surface 40 b at the groove bottom of the grooves 13 and 22. This can be ensured by forming the concave portion 42 forming the following.
[0036]
In this embodiment, both the mounting plate portion 14 of the first member 10 and the side portion of the second member 20 are connected with a thin connecting piece 50, and both are made of plastic material. The members can be molded simultaneously and integrally. (FIG. 1, FIG. 5, FIG. 6) The first member 10 and the second member 20 that are integrally molded in this way are the first member 10 side and the first member 10 on which the shaft protrusion 11 is provided. The side where the shaft hole 21 of the second member 20 is provided faces the same side (FIGS. 1 and 6), the connecting portion 51 with one end of the connecting piece 50 is bent, and this By rotating the first member 10 or the second member 20 toward the other member around the bending position, the shaft protrusion 11 side and the shaft hole 21 side can face each other. (FIG. 2) The first member 10 and the second member 20 can be smoothly combined by accommodating the shaft protrusion 11 in the shaft hole 21. (FIG. 3) In the process of combining in this way, the connecting portion 51 with one end of the connecting piece 50 is broken and the viscous liquid 30 is applied as described above, and after the combination, the other end of the connecting piece 50 By breaking the connecting portion 51, the connecting piece 50 is removed, and the assembly of the damper is completed. (Fig. 3, Fig. 4)
[0037]
【The invention's effect】
According to the damper according to the present invention, when the damper is used, the first member and the second member, which are rotatably combined, move so as to be separated from each other in a direction along the rotation axis direction of the rotation. Even if the interval between the surface at the groove bottom of the groove and the surface at the tip of the protrusion is widened, the braking force between the surfaces where the distance is increased from the beginning becomes the braking force of the entire damper. Because the ratio of the occupancy is small, the braking force of the entire damper is not greatly reduced, and even if such movement occurs with a simple structure, the damping force of the damper is kept close to the required level. can do.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a damper structure before assembly. FIG. 2 is a perspective view showing a process of damper assembly. FIG. 3 is a perspective view showing a process of damper assembly. FIG. 5 is a plan view showing a damper structure before assembly. FIG. 6 is a cutaway side view of the main part showing the damper structure before assembly. FIG. 7 is a cross-sectional view taken along line AA in FIG. 9 is a cross-sectional view of the main part of the damper. FIG. 11 is a cross-sectional view of the main part of the damper. FIG. 12 is a cross-sectional view of the conventional example. FIG. Sectional view [Explanation of symbols]
10 First member 12 Protrusion 13 Groove 20 Second member 22 Groove 23 Protrusion 30 Viscous liquid M Opposing surface S Gap 40a Groove side surface 40b Surface 41a at the bottom of the groove Side surface 41b of the protuberance

Claims (1)

円環状をなす溝と当該溝に収まる円環状をなす突部とをそれぞれ有し、当該溝に当該突部を収めて、回転可能に組み合わされる第一及び第二の部材と、当該第一の部材と第二の部材との対向面間に封入される粘性液体とを有し、前記第一の部材の第二の部材に対する回転又は相対的な回転に当該粘性液体による制動を与えるダンパであって、
前記対向面の少なくとも一部を構成する前記溝と前記突部の面のうち、前記溝の溝底にある面と前記突部の先端にある面との間の間隔が、当該溝の溝側面と当該突部の側面との間の間隔よりも広くなるように構成してあり、
ダンパ全体の制動力に対する前記溝の溝底にある面と前記突部の先端にある面との間で生じる制動力の占める割合が当初より少なくなるようにしてあると共に、
前記突部の先端にある面と前記溝の溝底にある面の双方又はいずれか一方に円環状をなす凹部が形成されていることを特徴とするダンパ。
An annular groove and an annular protrusion that fits in the groove, the first and second members that are rotatably combined with the protrusion in the groove, and the first A damper that has a viscous liquid sealed between the opposing surfaces of the member and the second member, and that applies a braking force by the viscous liquid to the rotation or relative rotation of the first member with respect to the second member. And
Of the surfaces of the groove and the protrusion that constitute at least a part of the facing surface, the distance between the surface at the groove bottom of the groove and the surface at the tip of the protrusion is the groove side surface of the groove. And is configured to be wider than the distance between the side surface of the protrusion and
The ratio of the braking force generated between the surface at the bottom of the groove and the surface at the tip of the protrusion with respect to the braking force of the entire damper is set to be smaller than the original,
A damper having an annular shape is formed in both or one of the surface at the tip of the protrusion and the surface at the groove bottom of the groove .
JP19913097A 1997-07-10 1997-07-10 damper Expired - Fee Related JP4018200B2 (en)

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JP4391397B2 (en) 2004-07-14 2009-12-24 株式会社ニフコ Rotating damper
JP2006250191A (en) * 2005-03-09 2006-09-21 Nifco Inc Damper
JP5172142B2 (en) 2006-03-29 2013-03-27 株式会社ニフコ Rotating damper
CN101101038B (en) * 2006-07-06 2011-03-23 尹学军 Damping structure and composite material
KR101264566B1 (en) 2012-02-21 2013-05-14 유순기 Free fall control using viscos fluid and mechanical selflocking reducer

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TW337320U (en) 1998-07-21
KR100232562B1 (en) 1999-12-01
JPH1130261A (en) 1999-02-02
KR19990013276A (en) 1999-02-25

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