JPH0514689U - Rotating damper - Google Patents

Abstract

(57)【要約】 【目的】 小形且つ扁平で、制動効果の優れた回転ダン
パーを得る。 【構成】 固定支持部材２０が粘性流体３０を入れた皿
形部２３を有し、歯車１１を有する被動回転部材１０が
上記皿形部２３内に回転自在に保持される逆皿形部１４
を有し、上記逆皿形部１４に、皿形部２３内の粘性流体
３０中に突入する翼片１７を設ける。 (57) [Summary] [Purpose] To obtain a small and flat rotary damper with excellent braking effect. The fixed supporting member 20 has a dish-shaped portion 23 containing a viscous fluid 30, and the driven rotating member 10 having a gear 11 is rotatably held in the dish-shaped portion 23.
The inverted dish-shaped portion 14 is provided with a wing piece 17 that projects into the viscous fluid 30 in the dish-shaped portion 23.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

この考案はグリースなどの粘性流体によって回転を制動する回転ダンパーに関 する。 The present invention relates to a rotary damper that brakes rotation by viscous fluid such as grease.

【０００２】[0002]

【従来の技術】[Prior Art]

歯車を一体に備えた被動回転部材と、上記被動回転部材を回転自在に保持する 固定支持部材と、上記両部材の間に介在する粘性流体とで構成された、二部材と 粘性流体とからなる回転ダンパーは実開昭６１−５０８４０号公報により公知で ある。 Two members and a viscous fluid composed of a driven rotary member integrally provided with a gear, a fixed support member for rotatably holding the driven rotary member, and a viscous fluid interposed between the two members. A rotary damper is known from Japanese Utility Model Laid-Open No. 61-50840.

【０００３】[0003]

【考案が解決しようとする課題】[Problems to be solved by the device]

部材の使用点数を最小限の二つにするのは回転ダンパーを小形化するためであ るが、小形ながら充分な制動効果を発揮させるため、上記従来の回転ダンパーで は固定支持部材に円錐***部を設け、被動回転部材に設けた凹円錐部を上記円錐 ***部に被せ、円錐***部の外面と、凹円錐部の内面との間に粘性流体を介在さ せ、これによって粘性流体を介して接触する被動回転部材と、固定支持部材の接 触面積を大きくしてある。従って、小形とはいっても、背が高いので薄いスペー スには使用することができない。 The minimum number of members used is two in order to miniaturize the rotary damper.However, in order to exert a sufficient braking effect in spite of its compact size, the above conventional rotary damper uses a conical protrusion on the fixed support member. And a concave conical portion provided on the driven rotating member is covered on the conical ridge, and a viscous fluid is interposed between the outer surface of the conical ridge and the inner surface of the concave conical portion. The contact area between the driven rotating member and the fixed supporting member that come into contact with each other is increased. Therefore, even though it is small, it is too tall to be used for thin spaces.

【０００４】[0004]

【課題を解決するための手段】[Means for Solving the Problems]

そこで本考案は小形で、扁平な回転ダンパーを得るために開発されたのであっ て、固定支持部材は円形で、内部に上記粘性流体を入れた皿形部を有し、被動回 転部材は上記皿形部の円筒壁の内周に回転自在に保持される円形の逆皿形部を有 し、上記逆皿形部の上壁下面には、前記皿形部材の内部の粘性流体中に突入する 翼片が設けられていることを特徴とする。 Therefore, the present invention was developed in order to obtain a small and flat rotary damper.The fixed support member has a circular shape and has a dish-shaped portion containing the viscous fluid inside, and the driven rotary member has the above-mentioned structure. There is a circular inverted dish-shaped portion that is rotatably held on the inner periphery of the cylindrical wall of the dish-shaped portion, and the lower wall of the upper side of the inverted dish-shaped portion projects into the viscous fluid inside the dish-shaped member. It is characterized by the provision of wings.

【０００５】[0005]

【実施例】 図示の実施例において、１０は歯車１１を一体に備えた被動回転部材、２０は 上記被動回転部材１０を回転自在に保持する固定支持部材、３０は両部材１０， ２０の間に介在するグリースなどの粘性流体であって、部材１０と２０はプラス チックで成形されている。Embodiment In the illustrated embodiment, 10 is a driven rotary member integrally provided with a gear 11, 20 is a fixed support member for rotatably holding the driven rotary member 10, and 30 is a space between both members 10, 20. The viscous fluid such as grease is interposed, and the members 10 and 20 are made of plastic.

【０００６】 被動回転部材１０は円形の上壁１２と、その周縁部から短く垂下する円筒壁１ ３とからなる逆皿形部１４を有し、前記歯車１１は上壁１２の上面に同心状に設 けられている。逆皿形部１４の寸法を例示すると、上壁１２の直径は１０ｍｍ、 厚さ０．７ｍｍ、上壁の上面から円筒壁１３の下面までの厚さは２．４ｍｍであ る。逆皿形部１４の上端部外周には、ほゞ半円形断面の環状突起１５が設けてあ る。The driven rotating member 10 has an inverted dish-shaped portion 14 consisting of a circular upper wall 12 and a cylindrical wall 13 that hangs shortly from its peripheral portion, and the gear 11 is concentric with the upper surface of the upper wall 12. It is set up in. As an example of the dimensions of the inverted dish portion 14, the diameter of the upper wall 12 is 10 mm, the thickness is 0.7 mm, and the thickness from the upper surface of the upper wall to the lower surface of the cylindrical wall 13 is 2.4 mm. On the outer periphery of the upper end of the inverted dish portion 14, an annular projection 15 having a substantially semicircular cross section is provided.

【０００７】 固定支持部材２０は円形の底壁２１と、その周縁部から短く起立する円筒壁２ ２とからなる皿形部２３を有する。皿形部２３の寸法を例示すると、底壁２１の 直径は１１．６ｍｍ、厚さ０．７ｍｍ、底壁の下面から円筒壁２２の上面迄の厚 さは３．４ｍｍであって、円筒壁２２の上端部内周には逆皿形部１４の環状突起 １５が嵌合する環状溝２４が設けてあり、逆皿形部１４を皿形部２３内に押し嵌 めると環状突起１５は環状溝２４に嵌合し、被動回転部材１０は固定支持部材２ ０に対して回転自在に保持される。固定支持部材には機器に対して固定したり、 位置決めするためにビスや、ピンを通す孔を有する二つのブラケット２５，２５ が皿形部の外に突設してある。The fixed support member 20 has a dish-shaped portion 23 including a circular bottom wall 21 and a cylindrical wall 22 that stands upright from a peripheral edge portion thereof. To illustrate the dimensions of the dish 23, the diameter of the bottom wall 21 is 11.6 mm, the thickness is 0.7 mm, and the thickness from the bottom surface of the bottom wall to the top surface of the cylindrical wall 22 is 3.4 mm. An annular groove 24 into which the annular protrusion 15 of the inverted dish portion 14 is fitted is provided on the inner periphery of the upper end portion of 22. When the inverted dish portion 14 is pressed into the dish portion 23, the annular protrusion 15 is annular. Fitted in the groove 24, the driven rotary member 10 is rotatably held with respect to the fixed support member 20. Two brackets 25, 25 having holes for inserting screws and pins for fixing and positioning with respect to the device are provided on the fixed support member so as to project outside the dish-shaped portion.

【０００８】 被動回転部材１０の上壁１２の下面中心からは短い軸１６が垂下し、固定支持 部材２０の底壁２１の上面中心からは上記軸１６が突入する軸筒２６が起立する 。この軸筒２６の内周下端部は底壁２１の中心孔２１′を通じ開放している。A short shaft 16 hangs from the center of the lower surface of the upper wall 12 of the driven rotary member 10, and a shaft cylinder 26 into which the shaft 16 projects from the center of the upper surface of the bottom wall 21 of the fixed support member 20 stands up. The lower end of the inner circumference of the shaft cylinder 26 is open through a center hole 21 'of the bottom wall 21.

【０００９】 固定支持部材の底壁２１の上面には同心の円弧状の弧状壁２７が複数、円周方 向に等間隔離して立設してある。又、被動回転部材の上壁１２の下面には、上記 弧状壁２７の内周と、軸筒２６の外周との間の環状空間２８に上から突入する同 心の円弧状の翼片１７が複数、円周方向に等間隔離して垂設してある。上記弧状 壁２７と、翼片１７は、この実施例では６０°の扇形で、円周方向に３０°の位 相で離して４つ設けてある。On the upper surface of the bottom wall 21 of the fixed support member, a plurality of concentric arc-shaped arc-shaped walls 27 are erected at equal intervals in the circumferential direction. Further, on the lower surface of the upper wall 12 of the driven rotary member, there are concentric arcuate blades 17 protruding from above into an annular space 28 between the inner circumference of the arcuate wall 27 and the outer circumference of the shaft cylinder 26. A plurality of them are erected in the circumferential direction at equal intervals. In this embodiment, the arc-shaped wall 27 and the blade 17 are fan-shaped at 60 °, and four arc-shaped walls 27 are provided at a phase of 30 ° in the circumferential direction.

【００１０】 被動回転部材１０の逆皿形部１４を、固定支持部材２０の皿形部２３内に前述 したように押し嵌める際は、その前に皿形部の軸筒２６の回りに粘性流体３０を 入れて置く。これにより逆皿形部１４を皿形部２３内に押し嵌め、被動回転部材 １０を固定支持部材２０に対し回転自在に保持すると、軸１６は軸筒２６に突入 し、翼片１７は環状空間２８中で粘性流体３０の中に突入する。尚、軸筒２６の 外径は３．０ｍｍ、弧状壁２７の内径は５．８ｍｍ、翼片１７は内径が３．６ｍ ｍ、外径が５．０ｍｍであり、弧状壁２７の上端は逆皿形部の上壁１２の下面に 近接し、翼片１７の下端は皿形部の底壁２１の上面に近接する。Before the inverted dish-shaped portion 14 of the driven rotary member 10 is press-fitted into the dish-shaped portion 23 of the fixed support member 20 as described above, viscous fluid is generated around the dish-shaped barrel 26. Put 30 and put. As a result, when the inverted dish-shaped portion 14 is press-fitted into the dish-shaped portion 23 and the driven rotary member 10 is rotatably held with respect to the fixed support member 20, the shaft 16 projects into the barrel 26 and the wing pieces 17 form the annular space. At 28, it rushes into the viscous fluid 30. The outer diameter of the shaft cylinder 26 is 3.0 mm, the inner diameter of the arc-shaped wall 27 is 5.8 mm, the blade piece 17 has an inner diameter of 3.6 mm, and the outer diameter is 5.0 mm. It is close to the lower surface of the upper wall 12 of the dish, and the lower ends of the wing pieces 17 are close to the upper surface of the bottom wall 21 of the dish.

【００１１】 こうして回転ダンパーを組立て、歯車１１を歯車やラックに噛み合わせて被動 回転部材１０に回転力を伝えると、その逆皿形部と一体で、粘性流体３０に突入 している翼片１７は粘性流体の抵抗に抗して回転することを余儀なくされ、これ によって被動回転部材に伝えられる回転を効果的に制動する。そして、この実施 例のように翼片１７が円周方向に離れていると、その離れた間隔を粘性流体が満 たすので、その間隔を満たす粘性流体を掻き分けながら翼片１７は回転しなけれ ばならなくなるので制動効果は一層、高まる。In this way, when the rotary damper is assembled and the gear 11 is meshed with the gear or the rack to transmit the rotational force to the driven rotary member 10, the blade piece 17 protruding into the viscous fluid 30 is integrated with the inverted dish portion. Are forced to rotate against the resistance of the viscous fluid, which effectively dampens the rotation transmitted to the driven rotating member. When the blade pieces 17 are separated from each other in the circumferential direction as in this embodiment, the separated distance is filled with the viscous fluid. Therefore, the blade pieces 17 must rotate while scraping the viscous fluid that fills the distance. The braking effect is further enhanced because it becomes unnecessary.

【００１２】 更に、皿形部２３に、この実施例のように中心の軸筒２６の回りに同心の弧状 壁２７を円周方向に離して設けると、皿形部２３に入れた粘性流体は弧状壁２７ の間隔から、弧状壁の外側と皿形部の内壁との空間２９をも満たし、多量の粘性 流体が入る。そして、軸筒２６と弧状壁２７との間の環状空間２８で粘性流体中 に突入した翼片１７は図５に破線で示すように、軸筒の外周と、弧状壁２７の内 周に近接しているので、軸筒と弧状壁の間の剪断抵抗に抗して翼片１７は環状空 間２８中で回転しなければならないと共に、翼片１７の間隔を満たす粘性流体は 、環状空間２８中の粘性流体、及び弧状壁２７の間隔を満たす粘性流体を介し弧 状壁２７の外の空間２９を満たす粘性流体と一体になっているため、多量の粘性 流体の全体を掻き分け、掻き乱しながら回転しなけらればならないので、歯車１ １に伝えられる外部の回転をより強力に制動できる。Further, when the dish-shaped portion 23 is provided with the arcuate walls 27 which are concentric with each other around the central axial tube 26 in the circumferential direction as in this embodiment, the viscous fluid contained in the dish-shaped portion 23 is The space between the arcuate wall 27 and the inner wall of the dish-shaped portion also fills the space 29 between the arcuate walls 27, and a large amount of viscous fluid enters. Then, as shown by the broken line in FIG. 5, the wing pieces 17 that have plunged into the viscous fluid in the annular space 28 between the shaft cylinder 26 and the arcuate wall 27 are close to the outer circumference of the shaft cylinder and the inner circumference of the arcuate wall 27. Therefore, the blade 17 must rotate in the annular space 28 against the shear resistance between the axial cylinder and the arcuate wall, and the viscous fluid that fills the gap between the blades 17 must move in the annular space 28. Since it is integrated with the viscous fluid inside and the viscous fluid filling the space 29 outside the arcuate wall 27 via the viscous fluid filling the space between the arcuate walls 27, a large amount of the viscous fluid is scraped off and disturbed. Since it must rotate while rotating, the external rotation transmitted to the gear 11 can be more strongly braked.

【００１３】[0013]

【考案の効果】[Effect of the device]

以上で明らかなように、本考案によれば、薄いスペースにも組入れることがで きる小形で、且つ扁平な、それでいて制動効果の優れた回転ダンパーを提供する ことができる。 As is clear from the above, according to the present invention, it is possible to provide a small-sized and flat rotary damper that can be installed in a thin space and yet has an excellent braking effect.

【図面の簡単な説明】[Brief description of drawings]

【図１】本考案の回転ダンパーの一実施例の断面図であ
る。FIG. 1 is a sectional view of an embodiment of a rotary damper according to the present invention.

【図２】被動回転部材の一部断面にした側面図である。FIG. 2 is a side view of a driven rotary member with a partial cross section.

【図３】被動回転部材の一半は上から、他半は下から見
た平面図である。FIG. 3 is a plan view in which one half of the driven rotary member is viewed from above and the other half is viewed from below.

【図４】支持固定部材の断面図である。FIG. 4 is a sectional view of a supporting and fixing member.

【図５】支持固定部材の平面図である。FIG. 5 is a plan view of a supporting and fixing member.

【符号の説明】[Explanation of symbols]

１０ 被動回転部材 １１ 歯車 １４ 逆皿形部 １７ 翼片 ２０ 固定支持部材 ２３ 皿形部 ３０ 粘性流体 10 Driven Rotating Member 11 Gear 14 Reverse Dish 17 Wing 20 Fixed Support Member 23 Dish 30 Viscous Fluid

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】 歯車を一体に備えた被動回転部材と、上
記被動回転部材を回転自在に保持する固定支持部材と、
上記両部材の間に介在する粘性流体とからなる回転ダン
パーにおいて、前記固定支持部材は円形で、内部に上記
粘性流体を入れた皿形部を有し、被動回転部材は上記皿
形部の円筒壁の内周に回転自在に保持される円形の逆皿
形部を有し、上記逆皿形部の上壁下面には、前記皿形部
材の内部の粘性流体中に突入する翼片が設けられている
ことを特徴とする回転ダンパー。1. A driven rotary member integrally provided with a gear, and a fixed support member rotatably holding the driven rotary member,
In the rotary damper made of a viscous fluid interposed between the two members, the fixed support member has a circular shape, and has a dish-shaped portion containing the viscous fluid therein, and the driven rotation member has a cylindrical shape of the dish-shaped portion. A circular inverted dish-shaped portion that is rotatably held on the inner periphery of the wall, and a wing piece that projects into the viscous fluid inside the dish-shaped member is provided on the upper wall lower surface of the inverted dish-shaped portion. A rotary damper characterized by being used.