JPH01158246A - Rotary damper - Google Patents
Rotary damperInfo
- Publication number
- JPH01158246A JPH01158246A JP31424687A JP31424687A JPH01158246A JP H01158246 A JPH01158246 A JP H01158246A JP 31424687 A JP31424687 A JP 31424687A JP 31424687 A JP31424687 A JP 31424687A JP H01158246 A JPH01158246 A JP H01158246A
- Authority
- JP
- Japan
- Prior art keywords
- casing
- orifice
- shaft
- liquid chamber
- partition wall
- 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
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 238000005192 partition Methods 0.000 claims description 19
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 abstract description 14
- 230000004888 barrier function Effects 0.000 abstract 4
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Classifications
-
- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
Abstract
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明はロータリーダンパに関する。[Detailed description of the invention] <Industrial application field> The present invention relates to a rotary damper.
〈従来の技術及びその問題点〉
従来のロータリーダンパとしては、一端をケーシング外
に突出させたシャフトのケーシング内に位置する部分に
捩じりコイルスプリングの一端を固定すると共に当該ス
プリングの他端をケーシングに固定し、そのスプリング
力により回転外力をダンピングするようにしたもの、或
いはケーシング内に円柱状の液体室を形成し、ケーシン
グ内壁と液体室内に位置するシャフトの外面との間に介
在する粘性液体の抵抗力によりダンピングを行うように
したもの等が知られている。<Prior art and its problems> In a conventional rotary damper, one end of a torsion coil spring is fixed to a portion located inside a casing of a shaft whose one end protrudes outside the casing, and the other end of the spring is fixed to a portion of the shaft located inside the casing. A device that is fixed to the casing and uses its spring force to damp external rotational force, or a cylindrical liquid chamber that is formed within the casing, and the viscosity that exists between the inner wall of the casing and the outer surface of the shaft located within the liquid chamber. There are known devices that perform damping using the resistance force of the liquid.
ところが、これらのロータリーダンパにあっては、ダン
ピングされる回転外力の大きさに応じてダンパのダンピ
ング力の大きさを適宜調整することができず、使用用途
に限りがあるという問題があった。However, these rotary dampers have a problem in that the magnitude of the damping force of the damper cannot be adjusted appropriately in accordance with the magnitude of the external rotational force to be damped, and the applications for which they can be used are limited.
本発明は上記従来の問題点に鑑みてなされたもので、ダ
ンピング力を可変としたロータリーダンパを提供するこ
とを目的とする。The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a rotary damper with variable damping force.
〈問題点を解決するための手段〉
上記目的を達成するために本発明によれば、液体を充填
した液体室を有するケーシングと、前記液体室の軸方向
に貫通して回動自在に配設され、少なくとも一端を前記
ケーシング外に臨ませると共に当該液体室内に位置する
部分の外周面軸方向に板状の回動ピストンを有するシャ
フトと、
前記ケーシング内壁に連設され、内端面が前記シャフト
外周面の軸方向に液密に当接した隔壁と、を備え、
前記液体室の前記隔壁両側面近傍に開口を有する又は当
該隔壁を貫通するオリフィスを形成すると共に当該オリ
フィスの通路面積を調整する通路面積調整手段を設けた
ことを特徴とするロータリーダンパが提供される。<Means for Solving the Problems> In order to achieve the above object, the present invention includes a casing having a liquid chamber filled with liquid, and a casing rotatably disposed through the liquid chamber in the axial direction. a shaft having at least one end facing outside the casing and a plate-shaped rotating piston extending in the axial direction of the outer circumferential surface of a portion located within the liquid chamber; a partition wall in liquid-tight contact in the axial direction of the surface, and a passageway having an opening near both side surfaces of the partition wall of the liquid chamber or forming an orifice penetrating the partition wall and adjusting the passage area of the orifice. A rotary damper is provided that is characterized by being provided with area adjustment means.
く作用〉
シャフトが、当該シャフトに連結されたダンピングすべ
き外部機器の被制動軸により例えば時計方向に回動され
ると、回動ピストンも同方向に回動し、液体室内の液体
はオリフィスを介して移動する。そして、回動ピストン
の回動時に当該回動ピストンの両側面に作用する液圧の
差圧が回転外力への抵抗力、つまりダンピング力となっ
て回動ピストンがダンピングされ、シャフトの角速度が
低下して外部機器の被制動軸の角速度が低下し、ダンピ
ングされる。When the shaft is rotated clockwise, for example, by a braked shaft of an external device to be damped connected to the shaft, the rotary piston also rotates in the same direction, and the liquid in the liquid chamber flows through the orifice. Move through. Then, when the rotary piston rotates, the differential pressure between the hydraulic pressures that acts on both sides of the rotary piston becomes a resistance force to the rotational external force, that is, a damping force, and the rotary piston is damped, reducing the angular velocity of the shaft. As a result, the angular velocity of the braked shaft of the external device decreases and is damped.
また、シャフトが被制動軸により反時計方向に回動され
る場合も同様にして回動ピストンがダンピングされて外
部機器の被制動軸がダンピングされる。Furthermore, when the shaft is rotated counterclockwise by the brake target shaft, the rotary piston is similarly damped and the brake target shaft of the external device is damped.
ところで、外部機器の被制動軸をダンピングさせる際、
通路面積調整手段によりオリフィスの通路面積を調整す
ることによってダンピング力を随時大きく或いは小さく
調整することができる。By the way, when damping the braked shaft of an external device,
By adjusting the passage area of the orifice using the passage area adjusting means, the damping force can be adjusted to be larger or smaller as needed.
〈実施例）
以下、本発明の一実施例を添付図面に基づいて詳述する
。<Example> Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.
第１図及び第２図において、本発明に係るロータリーダ
ンパはケーシング１．シャフト３、回動ピストン５．隔
壁７．オリフィス８゜アジャストスクリュー１０等から
なる。1 and 2, the rotary damper according to the present invention has a casing 1. Shaft 3, rotating piston 5. Partition wall7. It consists of an 8° orifice and 10 adjustment screws.
ケーシング１は円筒状で、２つの部材ＩＡ。The casing 1 is cylindrical and has two parts IA.
ＩＢを相互に液密にネジ結合して構成されており、その
内部には略円柱状の液体室２が形成されている。It is constructed by screwing IBs together liquid-tightly, and a substantially cylindrical liquid chamber 2 is formed inside.
シャフト３は液体室２を当該液体室２の軸方向に貫通し
て正・逆回動自在に配設され、その両端はケーシング１
の両端において夫々外部に臨んでいる。このシャフト３
は中空で、中空孔にはキー溝３ａが貫通形成されてダン
ピングすべき外部機器の被制動軸４を挿入して連結固定
し得るようになっている。The shaft 3 is disposed to pass through the liquid chamber 2 in the axial direction of the liquid chamber 2 and is rotatable forward and backward, and both ends thereof are connected to the casing 1.
Each end faces the outside. This shaft 3
is hollow, and a keyway 3a is formed through the hollow hole so that a braked shaft 4 of an external device to be damped can be inserted and connected and fixed therein.
シャフト３の液体室２内に位置する部分の外周面３ｂに
は軸方向に回動ピストン５が突出して形成されている。A rotary piston 5 is formed on the outer circumferential surface 3b of a portion of the shaft 3 located within the liquid chamber 2 so as to protrude in the axial direction.
回動ピストン５は平板状で、軸方向長さは液体室２の長
さより僅かに短く設定されており、また、径方向の先端
面５ａはケーシング１の内周面１ａに液密に当接して回
動摺動可能となっている。The rotating piston 5 has a flat plate shape, and its axial length is set to be slightly shorter than the length of the liquid chamber 2, and its radial tip surface 5a is in liquid-tight contact with the inner circumferential surface 1a of the casing 1. It is possible to rotate and slide.
さらに、シャフト３には回動ピストン５の面外側の位置
にフランジ６．６が夫々軸方向に隣接して形成され、シ
ャフト３に外力が付与されても回動ピストン５に直接負
荷がかからないようになっている。Furthermore, flanges 6 and 6 are formed on the shaft 3 at positions on the outside of the surface of the rotary piston 5 so as to be adjacent to each other in the axial direction, so that even if an external force is applied to the shaft 3, no direct load is applied to the rotary piston 5. It has become.
ケーシング１の内壁には隔壁７が一体に連設されており
、隔壁７の内端面７ａはシャフト３外周面３ｂの軸方向
に液密に当接している。この隔壁７と回動ピストン５と
により液体室２は２つの液室２ａ、２ｂに縦割りに仕切
られる。また、隔壁７にはオリフィス８が貫通形成され
てその両端開口が隔壁７の両側面７ｂ、７ｂ”に形成さ
れている。A partition wall 7 is integrally connected to the inner wall of the casing 1, and the inner end surface 7a of the partition wall 7 is in liquid-tight contact with the outer peripheral surface 3b of the shaft 3 in the axial direction. The partition wall 7 and the rotating piston 5 vertically partition the liquid chamber 2 into two liquid chambers 2a and 2b. Further, an orifice 8 is formed through the partition wall 7, and openings at both ends thereof are formed on both side surfaces 7b, 7b'' of the partition wall 7.
また、ケーシングｌにはオリフィス８に略直交して連通
する孔９が当該ケーシング１の外壁から穿設されている
。この孔９はネジ部９Ａと、ネジ部９Ａより中心部側の
小径部９Ｂとからなり、この孔９に通路面積調整手段と
してのアジャストスクリュー１０が装着される。Furthermore, a hole 9 is bored through the outer wall of the casing 1 and communicates with the orifice 8 substantially orthogonally. This hole 9 consists of a threaded portion 9A and a small diameter portion 9B closer to the center than the threaded portion 9A, and an adjustment screw 10 as a passage area adjusting means is attached to this hole 9.
アジャストスクリュー１０はネジ部１０Ａとピン部１０
Ｂとからなり、ネジ部１０Ａは孔９のネジ部９Ａに嵌合
し、ピン部１０Ｂはシール部材１１を装着されて小径部
９Ｂに軸方向摺動自在且つ回転自在に嵌挿される。The adjustment screw 10 has a threaded portion 10A and a pin portion 10.
The threaded portion 10A is fitted into the threaded portion 9A of the hole 9, and the pin portion 10B is fitted with a seal member 11 and fitted into the small diameter portion 9B so as to be slidable in the axial direction and rotatable.
尚、符号１２はアジャストスクリュー１０の緩み止め用
のナツトである。Incidentally, reference numeral 12 is a nut for preventing the adjustment screw 10 from loosening.
以下に作用を説明する。The action will be explained below.
シャフト３がダンピングすべき外部機器の被制動軸４に
より第１図の矢印Ｃ方向（時計方向）に回動されると、
回動ピストン５も同方向に回動する。このとき回動ピス
トン５は、その先端面５ａがケーシング１の内周面１ａ
に対して液密に当接した状態で回動し、液室２ａ内の液
体はオリフィス８を介して液室２ｂ内へ流入する。そし
て、ピストン５回動時に回動ピストン５の両側面に作用
する液圧の差圧が回転外力への抵抗力、つまりダンピン
グ力となって回動ピストン５がダンピングされ、シャフ
ト３の角速度が低下して外部機器の被制動軸４の角速度
が低下し、ダンピングされる。When the shaft 3 is rotated in the direction of arrow C (clockwise) in FIG. 1 by the braked shaft 4 of the external device to be damped,
The rotating piston 5 also rotates in the same direction. At this time, the rotary piston 5 has its tip end surface 5a aligned with the inner circumferential surface 1a of the casing 1.
The liquid in the liquid chamber 2a flows into the liquid chamber 2b through the orifice 8. Then, when the piston 5 rotates, the differential pressure between the hydraulic pressures acting on both sides of the rotary piston 5 becomes a resistance force to the rotational external force, that is, a damping force, the rotary piston 5 is damped, and the angular velocity of the shaft 3 is reduced. As a result, the angular velocity of the braked shaft 4 of the external device decreases and is damped.
また、シャフト３が被制動軸４により第１図の矢印ＣＣ
方向Ｃ反時計方向）に回動される場合も同様にして液室
２ｂ内の液体がオリフィス８を介して液室２ａ内へ流入
し、回動ピストン５がダンピングされて外部機器の被制
動軸４がダンピングされる。In addition, the shaft 3 is moved by the braked shaft 4 to the point indicated by the arrow CC in FIG.
Similarly, when the liquid chamber 2b is rotated in the direction C (counterclockwise), the liquid in the liquid chamber 2b flows into the liquid chamber 2a through the orifice 8, and the rotary piston 5 is damped and the braked shaft of the external device is 4 is damped.
ところで、アジャストスクリュー１０を時計方向に回転
すると当該アジャストスクリュー１０は孔９とネジ嵌合
しているのでケーシングｌの中心部に向かって送り込ま
れる。これにより、アジャストスクリューｌＯのピン部
１０Ｂが孔９の小径部９Ｂにガイドされて回転しながら
送り込まれ、オリフィス８内にその先端が進入してオリ
フィス８の通路面積が狭められる。ここで、前述のダン
ピング力はオリフィス８の通路面積が小さくなると大き
くなることが知られているので、アジャストスクリュー
１０を時計方向へ回転させることによりロータリーダン
パのダンピング力は大きくなる。By the way, when the adjusting screw 10 is rotated clockwise, the adjusting screw 10 is threaded into the hole 9 and is fed toward the center of the casing l. As a result, the pin portion 10B of the adjustment screw IO is guided by the small diameter portion 9B of the hole 9 and sent in while rotating, and its tip enters into the orifice 8, thereby narrowing the passage area of the orifice 8. Here, since it is known that the above-mentioned damping force increases as the passage area of the orifice 8 becomes smaller, the damping force of the rotary damper increases by rotating the adjustment screw 10 clockwise.
同様にして、アジャストスクリュー１０を反時計方向へ
回転させることによって、ダンピング力を小さくするこ
とができる。Similarly, by rotating the adjustment screw 10 counterclockwise, the damping force can be reduced.
第３図及び第４図は本発明に係るロータリーダンパの他
の実施例を示し、この実施例はオリフィス３２をケーシ
ング３１の底壁３１ａに設けたもので、前記実施例と同
一要素については同一符号を附して説明する。3 and 4 show another embodiment of the rotary damper according to the present invention, in which an orifice 32 is provided in the bottom wall 31a of the casing 31, and the same elements as in the previous embodiment are the same. The explanation will be given with reference numerals.
即ち、オリフィス３２は、隔壁３３の一例側面３３ａ近
傍のケーシング３１内底面３１ｂから下方に向かった後
、ケーシング３１内底面３１ｂに略平行に隔壁３３の下
方を通り、隔壁３３の他側側面３３ａ′近傍のケーシン
グ３１内底面３１ｂに向かっている。つまり、液体室２
の隔壁３３両側面３３ａ、３３ａ’近傍にオリフィス３
２の両端開口が形成されている。That is, the orifice 32 extends downward from the inner bottom surface 31b of the casing 31 near one example of the side surface 33a of the partition wall 33, passes below the partition wall 33 substantially parallel to the inner bottom surface 31b of the casing 31, and passes through the other side surface 33a' of the partition wall 33. It is directed toward the inner bottom surface 31b of the nearby casing 31. In other words, liquid chamber 2
There are orifices 3 near both sides 33a and 33a' of the partition wall 33.
Two openings are formed at both ends.
また、オリフィス３２のケーシング３１内底面３１ｂと
の平行部分に略直交して連通ずる孔９がケーシング３１
の外壁から穿設され、この孔９に通路面積調整手段とし
てのアジャストスクリュー１０が装着される。Further, a hole 9 that communicates with the casing 31 inner bottom surface 31b substantially perpendicularly to the parallel portion of the orifice 32 with the inner bottom surface 31b of the casing 31 is provided.
An adjustment screw 10 serving as a passage area adjusting means is attached to this hole 9 .
そして、このアジャストスクリュー１０を前述の実施例
と同様に時計方向、或いは反時計方向に回転することに
よりダンピング力を大きく、或いは小さく随時容易に調
整することができる。By rotating this adjustment screw 10 clockwise or counterclockwise as in the previous embodiment, the damping force can be easily adjusted to be larger or smaller at any time.
尚、この実施例ではオリフィス３２の両端開口をケーシ
ング３１の内底面３１ｂに形成したが、隔壁３３両側面
３３ａ、３３ａ’近傍のケーシング３１内周面に形成す
るようにしてもよい。In this embodiment, the openings at both ends of the orifice 32 are formed on the inner bottom surface 31b of the casing 31, but they may be formed on the inner circumferential surface of the casing 31 near both side surfaces 33a and 33a' of the partition wall 33.
また、前記両実施例ともに液体室２に封入する液体とし
てはシリコンオイル、グリス、 −ワックス等があり、
目的・用途に応じて適宜選択使用するものとする。Furthermore, in both of the above embodiments, the liquid sealed in the liquid chamber 2 includes silicone oil, grease, -wax, etc.
Appropriate selection and use shall be made according to the purpose and use.
〈発明の効果〉
以上説明したように本発明によれば、オリフィスの通路
面積を調整する通路面積調整手段を設けたので、ダンピ
ングされる回転外力の大きさに応じてオリフィスの通路
面積を調整することによりダンピング力を随時太き（或
いは小さくすることがでと、使用用途が広がるという効
果が得られる。<Effects of the Invention> As explained above, according to the present invention, since the passage area adjusting means for adjusting the passage area of the orifice is provided, the passage area of the orifice is adjusted according to the magnitude of the external rotational force to be damped. As a result, by increasing (or decreasing) the damping force as needed, the effect of broadening the range of uses can be obtained.
第１図は本発明に係るロータリーダンパの一実施例を示
す断面図、第２図は第１図の■−ｎ断面図、第３図は本
発明に係るロータリーダンパの他の実施例を示す断面図
、第４図は第３図のＩＶ−ＩＶ断面図である。
１・・・・・・ケーシング
２・・・・・・液体室
３・・・・・・シャフト
５・・・・・・回動ピストン
７・・・・・・隔壁
７ａ・・・内端面
７ｂ、７ｂ’・・・側面
８・・・・・・オリフィス
１０・・・・・・アジャストスクリュー３１・・・・・
・ケーシング
３２・・・・・・オリフィス
３３・・・・・・隔壁
３３ａ、３３ａ’・・・側面FIG. 1 is a cross-sectional view showing one embodiment of the rotary damper according to the present invention, FIG. 2 is a cross-sectional view taken along the line ■-n in FIG. 1, and FIG. 3 is a cross-sectional view showing another embodiment of the rotary damper according to the present invention. The sectional view, FIG. 4, is a sectional view taken along the line IV-IV in FIG. 3. 1... Casing 2... Liquid chamber 3... Shaft 5... Rotating piston 7... Partition wall 7a... Inner end surface 7b , 7b'... Side 8... Orifice 10... Adjustment screw 31...
・Casing 32... Orifice 33... Bulkhead 33a, 33a'... Side
Claims (1)
ると共に当該液体室内に位置する部分の外周面軸方向に
板状の回動ピストンを有するシャフトと、 前記ケーシング内壁に連設され、内端面が 前記シャフト外周面の軸方向に液密に当接した隔壁と、
を備え、 前記液体室の前記隔壁両側面近傍に開口を 有する又は当該隔壁を貫通するオリフィスを形成すると
共に当該オリフィスの通路面積を調整する通路面積調整
手段を設けたことを特徴とするロータリーダンパ。[Scope of Claims] A casing having a liquid chamber filled with liquid; a casing that extends through the liquid chamber in an axial direction and is rotatably disposed, with at least one end facing outside the casing and located within the liquid chamber; a shaft having a plate-shaped rotating piston in the axial direction of the outer circumferential surface of a portion thereof; a partition wall that is connected to the inner wall of the casing and whose inner end surface is in liquid-tight contact with the outer circumferential surface of the shaft in the axial direction;
A rotary damper comprising: an orifice having an opening near both side surfaces of the partition wall of the liquid chamber, or an orifice penetrating the partition wall, and a passage area adjusting means for adjusting the passage area of the orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31424687A JPH01158246A (en) | 1987-12-14 | 1987-12-14 | Rotary damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31424687A JPH01158246A (en) | 1987-12-14 | 1987-12-14 | Rotary damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01158246A true JPH01158246A (en) | 1989-06-21 |
Family
ID=18051045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31424687A Pending JPH01158246A (en) | 1987-12-14 | 1987-12-14 | Rotary damper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01158246A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100458501B1 (en) * | 2001-05-30 | 2004-12-03 | 박근종 | Rotary type damper |
| KR100767326B1 (en) * | 2001-12-28 | 2007-10-17 | 현대중공업 주식회사 | rotary viscous damper |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS603336B2 (en) * | 1978-12-29 | 1985-01-28 | ポリサ−・リミテツド | rubbery composition |
-
1987
- 1987-12-14 JP JP31424687A patent/JPH01158246A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS603336B2 (en) * | 1978-12-29 | 1985-01-28 | ポリサ−・リミテツド | rubbery composition |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100458501B1 (en) * | 2001-05-30 | 2004-12-03 | 박근종 | Rotary type damper |
| KR100767326B1 (en) * | 2001-12-28 | 2007-10-17 | 현대중공업 주식회사 | rotary viscous damper |
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