JP2520211Y2 - Viscous fluid type rotary damper - Google Patents

Description

【考案の詳細な説明】 〈産業上の利用分野〉 この考案は入力軸に伝達されるトルクをオイルなどの
粘性により緩衝、制動する粘性流体式回転ダンパーに関
する。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a viscous fluid type rotary damper that buffers and brakes torque transmitted to an input shaft by viscosity of oil or the like.

〈従来の技術〉 オイルを収容した密閉ケース内に、該ケースの外に突
出する入力軸を中心に備えた円板や、放射状の翼からな
る回転体を収め、入力軸に伝達されるトルクにより密閉
ケース中で回転体を回転させ、回転体がオイルなどの粘
性流体の粘性に抗して該流体剪断する抵抗でトルクを緩
衝、制動する粘性流体式回転ダンパーは本出願人の特開
昭61−192937号公報で公知である。<Prior Art> A sealed case containing oil contains a disk centered on an input shaft protruding outside the case and a rotating body composed of radial blades. A viscous fluid-type rotary damper that rotates a rotating body in a sealed case and buffers and brakes the torque by the resistance of the rotating body to shear the fluid against the viscosity of viscous fluid such as oil is disclosed in JP-A-61-61 It is known from Japanese Patent No. 192937.

〈考案が解決しようとする課題〉 上記公知のダンパーでトルクを緩衝、制動する機能を
高めるには、回転体の直径を大にし、回転体が粘性流体
を剪断する面積を大きくしなければならないが、そうす
ると密閉ケース自体も大形になって嵩張り、適用機器に
充分なスペースが無い場合は組込みが困難ないし不可能
になる。<Problems to be Solved by the Invention> In order to enhance the function of buffering and braking torque by the known damper, it is necessary to increase the diameter of the rotor and increase the area where the rotor shears the viscous fluid. Then, the sealed case itself becomes large and bulky, and it becomes difficult or impossible to assemble it if there is not enough space in the applied equipment.

〈課題を解決するための手段〉 そこで本考案の粘性流体式回転ダンパーは、粘性流体
を収容した密閉ケース内に、該ケースの外に突出する入
力軸を備えた入力ロータと、被動ロータを平行に架設
し、上記両ロータ間に無端ベルトを張設したことを特徴
とする。<Means for Solving the Problem> Therefore, in the viscous fluid type rotary damper of the present invention, an input rotor having an input shaft projecting outside the case and a driven rotor are arranged in parallel in a hermetically sealed case containing a viscous fluid. And an endless belt is stretched between the rotors.

〈実施例〉 図示の実施例において、１は密閉ケース、２はケース
内に収容された粘性流体、例えばシリコンオイル、３は
入力ロータ、４は被動ロータ、５は無端ベルトを示す。<Embodiment> In the illustrated embodiment, 1 is a closed case, 2 is a viscous fluid contained in the case, for example, silicone oil, 3 is an input rotor, 4 is a driven rotor, and 5 is an endless belt.

密閉ケース１は扁平な有底の筒形本体６と、本体６の
開口部６′に嵌合する中蓋７と、中蓋７の上に重なり、
本体６の開放端面に対してビスなどで固定される外蓋８
からなり、本体、中蓋、外蓋はプラスチックの成形品で
ある。The closed case 1 has a flat bottomed cylindrical main body 6, an inner lid 7 that fits into an opening 6 ′ of the main body 6, and an upper lid 7 that overlaps the inner lid 7.
An outer lid 8 fixed to the open end surface of the body 6 with a screw or the like
The main body, inner lid and outer lid are molded plastic parts.

筒形本体６は小判形断面形状の収容室９を有し、その
底から起立する仕切壁10は無端ベルトの通過間隙を保っ
て収容室９内を入力ロータの収容部9aと、被動ロータの
収容部9bに仕切る。The cylindrical main body 6 has an accommodating chamber 9 having an oval cross-sectional shape, and a partition wall 10 standing upright from the bottom of the accommodating chamber 9 keeps a passage gap of an endless belt and the interior of the accommodating chamber 9 accommodates the accommodating portion 9a of the input rotor and the driven rotor. Divide into the storage section 9b.

入力ロータ３、被動ロータ４は共にアルミ合金製で、
入力ロータ３の一端からは同心の長い入力軸11が一体に
突出する。又、入力ロータの他端と、被動ロータの各端
からは同心の短い中心軸３′,4′,4′が突出する。そし
て、前記収容部9a,9bの底には入力ロータ及び被動ロー
タの各他端の中心軸を回転自在に受入れる盲の軸受孔12
が設けてある。又、中蓋７の外形は本体６の開口部に嵌
合するため収容室９よりも僅かに大きい小判形で、入力
軸10を貫通させる貫通軸受孔13と、被動ロータの一端の
中心軸を受入れる盲の軸受孔14と、仕切壁10の自由端部
を支持する盲の支持孔15が設けてある。外蓋８は入力軸
を貫通させる貫通孔16を有する。The input rotor 3 and the driven rotor 4 are both made of aluminum alloy,
A long concentric input shaft 11 integrally projects from one end of the input rotor 3. Further, concentric short central shafts 3 ', 4', 4'project from the other end of the input rotor and each end of the driven rotor. A blind bearing hole 12 is formed in the bottom of each of the accommodating portions 9a and 9b to rotatably receive the center axes of the other ends of the input rotor and the driven rotor.
Is provided. Further, the outer shape of the inner lid 7 is an oval shape which is slightly larger than the accommodation chamber 9 because it fits in the opening of the main body 6, and the through shaft bearing hole 13 through which the input shaft 10 penetrates and the central axis of one end of the driven rotor are formed. A blind bearing hole 14 for receiving and a blind support hole 15 for supporting the free end of the partition wall 10 are provided. The outer lid 8 has a through hole 16 for penetrating the input shaft.

ダンパーに組立てるには入力ロータ３と被動ロータ４
にゴム製などの無端ベルト５を掛け渡し、入力ロータ３
を収容部9a、被動ロータ４を収容部9bに収めてその中心
軸３′,4′を各軸受孔12に入れ、それから収容室９にシ
リコンオイルなどの粘性流体２を注入して満たした後、
本体から外に突出する入力軸11に貫通軸受孔13を嵌めな
がら中蓋７を本体の開口部６′に嵌合して被動ロータの
中心軸４′を軸受孔14、仕切壁10の端部を支持孔15に収
め、それから貫通孔16を入力軸11に嵌めながら外蓋８を
中蓋と、本体の端面に重ね、その四隅にビスを通し、本
体に対し締付けることにより固定する。To assemble the damper, input rotor 3 and driven rotor 4
The endless belt 5 made of rubber or the like is stretched over the input rotor 3
After accommodating the accommodating portion 9a and the driven rotor 4 in the accommodating portion 9b and inserting the central shafts 3 ', 4'into each bearing hole 12, and then filling the accommodating chamber 9 with the viscous fluid 2 such as silicone oil, ,
The inner shaft 7 is fitted in the opening 6'of the main body while the through shaft bearing hole 13 is fitted in the input shaft 11 protruding outward from the main body, and the center shaft 4'of the driven rotor is set in the bearing hole 14 and the end of the partition wall 10. Are housed in the support hole 15, and then the outer cover 8 is placed on the inner cover and the end face of the main body while the through hole 16 is fitted on the input shaft 11, and screws are passed through the four corners of the outer cover to fasten the main body.

尚、中蓋７の回りにはＯリング17を嵌めて外蓋８で圧
縮し、収容室に注入した粘性流体が外に洩れるのを防止
し、又、入力軸11と外蓋の貫通孔16の間にもＯリング18
を嵌め、入力軸11を伝わって粘性流体が外に洩れるのを
防止するようにして置くことが好ましい。An O-ring 17 is fitted around the inner lid 7 and compressed by the outer lid 8 to prevent the viscous fluid injected into the storage chamber from leaking to the outside, and the input shaft 11 and the through hole 16 in the outer lid. O ring 18 between
It is preferable to place it so that the viscous fluid is prevented from leaking outside through the input shaft 11.

又、入力ロータや、被動ロータの外周と、無端ベルト
５の内面には互いに噛み合う係合部19を設け、入力軸か
ら入力ロータ３に加えられるトルクがスリップすること
なく無端ベルト５を介して被動ロータ４に伝達されるよ
うにして置くことが好ましい。この実施例では互いに噛
み合う係合部19は三角形断面の山条と谷条になっている
が、これに限定されず、突起と、この突起が入る孔、そ
の他でもよい。In addition, engaging portions 19 that mesh with each other are provided on the input rotor and the outer periphery of the driven rotor and on the inner surface of the endless belt 5 so that the torque applied from the input shaft to the input rotor 3 does not slip and is driven via the endless belt 5. It is preferably placed so as to be transmitted to the rotor 4. In this embodiment, the engaging portions 19 that mesh with each other are mountain-ridges and valley-ridges having a triangular cross section, but the invention is not limited to this, and may be a protrusion, a hole into which this protrusion is inserted, or the like.

このダンパーは、外部から入力軸11に加えられるトル
クで入力ロータ３が回転し、これに伴い無端ベルト５を
介して被動ロータ４が回転し、同時に無端ベルト５は循
環運動するが、これらの入力ロータ、被動ロータの回
転、無端ベルトの循環運動は密閉ケース内の粘性流体で
満たされた収容室内で行なわれるため、粘性流体の粘性
抵抗によりその動きは緩衝、制動され、入力軸にトルク
を加える物体の動きは静粛になる。In this damper, the input rotor 3 is rotated by the torque applied to the input shaft 11 from the outside, and the driven rotor 4 is rotated via the endless belt 5 accordingly, and at the same time, the endless belt 5 circulates. Rotation of the rotor and driven rotor, and circulation movement of the endless belt are performed in the storage chamber filled with viscous fluid in the closed case, so the movement is buffered and damped by viscous resistance of the viscous fluid, and torque is applied to the input shaft. The movement of the object becomes quiet.

そして、ダンパー効果を高めるには入力ロータ、被動
ロータの直径を大きくせず軸方向の長さを増し、両ロー
タ間に張設する無端ベルトの幅を広げるか、或は無端ベ
ルトの数をふやし（図示の実施例では無端ベルトを三本
張設してある。）、所望の緩衝、制動力を備えたものに
することができる。To increase the damper effect, increase the axial length without increasing the diameter of the input rotor and driven rotor, and widen the width of the endless belt stretched between both rotors, or increase the number of endless belts. (Three endless belts are stretched in the illustrated embodiment.), And a desired cushioning force and a braking force can be provided.

尚、図中、20は筒形本体と一体で、取付孔21を備えた
相手機器への取付片を示す。In the figure, reference numeral 20 denotes a mounting piece that is integral with the tubular main body and that has a mounting hole 21 and is mounted on a counterpart device.

〈考案の効果〉 こうして本考案によれば扁平で、緩衝、制動力を高め
たにしても扁平な寸法は変わらず、これにより取付けス
ペースの制約を受けることが少ない高トルク用の粘性流
体式回転ダンパーを提供できる。<Effect of device> Thus, according to the present invention, the flat size does not change even if the cushioning and braking forces are increased, and the viscous fluid type rotation for high torque is less subject to the restriction of the installation space. A damper can be provided.

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

図面は本考案のダンパーの一実施例を示すもので、第１
図は断面図、第２図は第１図のII−II線での断面図、第
３図は筒形本体の第２図と同様な断面図、第４図は筒形
本体の正面図、第５図は中蓋の正面図、第６図は中蓋の
断面図である。 図中、１は密閉ケース、２は粘性流体、３は入力ロー
タ、４は被動ロータ、５は無端ベルト、６は筒形本体、
７は中蓋、８は外蓋、９は収容室、10は仕切壁、11は入
力軸である。The drawing shows an embodiment of the damper of the present invention.
The drawing is a cross-sectional view, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, FIG. 3 is a cross-sectional view similar to FIG. 2 of the tubular body, and FIG. 4 is a front view of the tubular body. FIG. 5 is a front view of the inner lid, and FIG. 6 is a sectional view of the inner lid. In the figure, 1 is a closed case, 2 is a viscous fluid, 3 is an input rotor, 4 is a driven rotor, 5 is an endless belt, 6 is a tubular body,
Reference numeral 7 is an inner lid, 8 is an outer lid, 9 is a housing chamber, 10 is a partition wall, and 11 is an input shaft.

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of utility model registration request] 【請求項１】粘性流体を収容した密閉ケース内に、該ケ
ースの外に突出する入力軸を備えた入力ロータと、被動
ロータを平行に架設し、上記両ロータ間に無端ベルトを
張設したことを特徴とする粘性流体式回転ダンパー。1. An input rotor having an input shaft protruding outside the case and a driven rotor are installed in parallel in a sealed case containing a viscous fluid, and an endless belt is stretched between the rotors. A viscous fluid type rotary damper characterized in that