JP2005090534A - Rotary damper - Google Patents
Rotary damper Download PDFInfo
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- JP2005090534A JP2005090534A JP2003320957A JP2003320957A JP2005090534A JP 2005090534 A JP2005090534 A JP 2005090534A JP 2003320957 A JP2003320957 A JP 2003320957A JP 2003320957 A JP2003320957 A JP 2003320957A JP 2005090534 A JP2005090534 A JP 2005090534A
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- Prior art keywords
- housing
- resistance
- rotor
- rotary damper
- interval
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- 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.)
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Classifications
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- 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
- F16F9/10—Springs, 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
- F16F9/12—Devices with one or more rotary vanes turning in the fluid any throttling effect being immaterial, i.e. damping by viscous shear effect only
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- 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
- F16F9/10—Springs, 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
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/145—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only rotary movement of the effective parts
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- 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
- F16F9/36—Special sealings, including sealings or guides for piston-rods
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- 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
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/14—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with fluid brakes of the rotary type
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
この発明は、例えば、歯車やラックと噛み合う被駆動歯車の回転を制動する回転ダンパーに関するものである。 The present invention relates to a rotary damper that brakes the rotation of a driven gear that meshes with a gear or a rack, for example.
上記した回転ダンパーは、ハウジングと、このハウジング内に収容された粘性流体と、ハウジング内に収められ、ハウジングから一部が突出する軸部にハウジング内の粘性流体中を移動する抵抗部が設けられたローターと、このローターの軸部とハウジングとの間から粘性流体が漏れるのを防止するシール部材と、で構成されている。
なお、ハウジングから突出する軸部には、被駆動歯車が取り付けられる。
A driven gear is attached to the shaft protruding from the housing.
従来の回転ダンパーは、組立時にハウジング内に混入した空気を、トルク発生部分であるローターの抵抗部とハウジングの底面あるいは天井面との間に位置させないように、抵抗部の形状を略小判型としている。
しかし、ローターは双方向へ回転するので、ハウジング内に混入した空気が抵抗部を乗り越えて抵抗部の反対側へ移動する際に異音が発生する。
このハウジング内に混入した空気が抵抗部を乗り越えるときに発生する異音は、ハウジング内に混入した空気が抵抗部へ乗り上げることによって圧縮された後、抵抗部を乗り越えたときに、急激に開放されることに起因する破裂音と考えられる。
なお、この異音は、粘性流体の粘度が高い程発生し易く、また、ローターとハウジングとの間隔が狭い程発生し易くなる。
The conventional rotary damper has a substantially oval shape so that the air mixed in the housing during assembly is not located between the resistance part of the rotor, which is the torque generating part, and the bottom or ceiling surface of the housing. Yes.
However, since the rotor rotates in both directions, abnormal noise is generated when the air mixed in the housing moves over the resistance portion and moves to the opposite side of the resistance portion.
The noise generated when the air mixed in the housing gets over the resistance part is compressed by the air mixed in the housing climbing onto the resistance part, and then suddenly released when the air gets over the resistance part. It is thought that it is a plosive sound caused by that.
This abnormal noise is more likely to be generated as the viscosity of the viscous fluid is higher, and more likely to be generated as the distance between the rotor and the housing is narrower.
この発明は、組立時に、ハウジング内に混入した空気が抵抗部を乗り越えないようにすることにより、ローターが双方向へ回転してもハウジング内に混入した空気に起因する異音の発生を防止することのできる回転ダンパーを提供するものである。 By preventing the air mixed in the housing from getting over the resistance portion at the time of assembly, the present invention prevents the generation of noise caused by the air mixed in the housing even when the rotor rotates in both directions. The present invention provides a rotating damper that can perform the above-described operation.
この発明は、以下のような発明である。
（１）ハウジングと、このハウジング内に収容された粘性流体と、前記ハウジング内に収められ、前記ハウジングから一部が突出する軸部に前記ハウジング内の前記粘性流体中を移動する抵抗部が設けられたローターと、前記軸部と前記ハウジングとの間から前記粘性流体が漏れるのを防止するシール部材と、からなる回転ダンパーにおいて、前記抵抗部を前記軸部から放射状に延出させて複数設け、この抵抗部に回転円周方向へ突出する突出部を設けるとともに、この突出部の先端を、所定の間隔をあけて対向させたことを特徴とする。
（２）（１）の回転ダンパーにおいて、前記突出部と前記ハウジングとの間隔を、前記抵抗部と前記ハウジングとの間隔よりも狭くしたことを特徴とする。
（３）（１）または（２）の回転ダンパーにおいて、前記突出部の先端と前記抵抗部との間隔を、前記対向する突出部の間隔よりも長くしたことを特徴とする。
（４）（１）から（３）のいずれか１つの回転ダンパーにおいて、前記対向する突出部の先端部を、先端方向へ窄まる形状としたことを特徴とする。
The present invention is as follows.
(1) A housing, a viscous fluid accommodated in the housing, and a resistance portion that moves in the viscous fluid in the housing is provided in a shaft portion that is housed in the housing and partially protrudes from the housing. And a plurality of the resistance portions extending radially from the shaft portion in a rotary damper comprising a rotor and a sealing member for preventing the viscous fluid from leaking between the shaft portion and the housing. In addition, the resistance portion is provided with a protruding portion that protrudes in the rotational circumferential direction, and the ends of the protruding portion are opposed to each other with a predetermined interval.
(2) In the rotary damper according to (1), the interval between the protruding portion and the housing is made narrower than the interval between the resistor portion and the housing.
(3) In the rotary damper of (1) or (2), the interval between the tip of the protruding portion and the resistance portion is longer than the interval between the opposing protruding portions.
(4) The rotating damper according to any one of (1) to (3) is characterized in that a tip portion of the opposing protruding portion is shaped to be constricted in the tip direction.
この発明によれば、抵抗部を軸部から放射状に延出させて複数設け、この抵抗部に回転円周方向へ突出する突出部を設けるとともに、この突出部の先端を、所定の間隔をあけて対向させたので、組立時にハウジング内に混入した空気は、抵抗部の回転時に負圧の発生する突出部の後端部分に追従するように移動することにより、抵抗部を乗り越えなくなる。
したがって、ローターが双方向へ回転してもハウジング内に混入した空気に起因する異音の発生を防止することができる。
また、突出部とハウジングとの間隔を、抵抗部とハウジングとの間隔よりも狭くしたので、抵抗部の回転時に、突出部の後端部分に負圧が発生し易くなり、その部分にハウジング内に混入した空気が溜まって突出部に追従して移動する。
したがって、ローターが双方向へ回転してもハウジング内に混入した空気に起因する異音の発生をさらに防止することができる。
また、突出部の先端と抵抗部との間隔を、対向する突出部の間隔よりも長くしたので、ローターの回転が反転するとき、ハウジング内に混入した空気は対向する突出部の一方から他方へ移り易くなる。
したがって、ローターが双方向へ回転してもハウジング内に混入した空気に起因する異音の発生をさらに防止することができる。
また、対向する突出部の先端部を、先端方向へ窄まる形状としたので、抵抗部の反回転時に、前回の抵抗部の回転時に突出部の後端部分に発生した負圧部（抵抗部の反転時の上流側に位置する突出部の上流側）から空気が離れ易くなる。
したがって、ローターが反回転するとき、ハウジング内に混入した空気の移動がスムーズになる。
According to the present invention, a plurality of resistor portions are provided radially extending from the shaft portion, and a protrusion portion protruding in the rotational circumferential direction is provided on the resistor portion, and the tip of the protrusion portion is spaced at a predetermined interval. Therefore, the air mixed in the housing at the time of assembly moves so as to follow the rear end portion of the protruding portion where the negative pressure is generated when the resistance portion rotates, and thus does not get over the resistance portion.
Therefore, even if the rotor rotates in both directions, it is possible to prevent the generation of abnormal noise due to the air mixed in the housing.
In addition, since the interval between the protruding portion and the housing is made narrower than the interval between the resistance portion and the housing, negative pressure is likely to be generated at the rear end portion of the protruding portion when the resistance portion is rotated, The air mixed in is accumulated and moves following the protrusion.
Therefore, even if the rotor rotates in both directions, it is possible to further prevent the generation of abnormal noise due to the air mixed in the housing.
In addition, since the distance between the tip of the protrusion and the resistance portion is longer than the distance between the opposing protrusions, when the rotation of the rotor is reversed, the air mixed in the housing moves from one of the opposing protrusions to the other. It becomes easy to move.
Therefore, even if the rotor rotates in both directions, it is possible to further prevent the generation of abnormal noise due to the air mixed in the housing.
In addition, since the tip of the protruding part that opposes has a shape constricted in the tip direction, the negative pressure part (resistor part) generated at the rear end part of the protrusion part during the previous rotation of the resistor part when the resistor part is rotated backward The air is easily separated from the upstream side of the projecting portion located on the upstream side during reversal.
Therefore, when the rotor rotates counterclockwise, the movement of air mixed in the housing becomes smooth.
以下、この発明の実施例を図に基づいて説明する。
図１はこの発明の第１実施例である回転ダンパーの断面図、図２は図１に示したローターの斜視図、図３は動作説明図である。
Embodiments of the present invention will be described below with reference to the drawings.
1 is a sectional view of a rotary damper according to a first embodiment of the present invention, FIG. 2 is a perspective view of the rotor shown in FIG. 1, and FIG.
図１において、Ｄは回転ダンパーを示し、合成樹脂製のケース１１と、このケース１１内に収容された粘性流体としてのシリコーンオイル２１と、ケース１１内に収められ、ケース１１から外部へ一部が突出する軸部３２にケース１１内のシリコーンオイル２１中を移動する抵抗部３６が設けられた合成樹脂製のローター３１と、このローター３１の軸部３２が貫通する貫通孔４２が設けられ、ケース１１の開口を閉塞する合成樹脂製のキャップ４１と、このキャップ４１とローター３１の軸部３２との間からシリコーンオイル２１が漏れるのを防止するシール部材としてのＯリング５１と、キャップ４１から突出するローター３１の軸部３２に取り付けられた合成樹脂製の被駆動歯車６１とで構成されている。
なお、ハウジングは、ケース１１と、キャップ４１とで構成されている。
In FIG. 1, D denotes a rotary damper, and a synthetic resin case 11, a silicone oil 21 as a viscous fluid accommodated in the case 11, and the case 11, and a part from the case 11 to the outside. Is provided with a rotor 31 made of a synthetic resin provided with a resistance portion 36 that moves in the silicone oil 21 in the case 11 and a through hole 42 through which the shaft portion 32 of the rotor 31 passes, From a cap 41 made of synthetic resin that closes the opening of the case 11, an O-ring 51 as a seal member that prevents the silicone oil 21 from leaking between the cap 41 and the shaft portion 32 of the rotor 31, and the cap 41 It is comprised with the synthetic resin driven gear 61 attached to the axial part 32 of the rotor 31 which protrudes.
The housing includes a case 11 and a cap 41.
上記したケース１１は、平面形状が円形の底部１３の外縁に周回させて円筒壁部１４が設けられたケース本体１２と、底部１３の中心に設けられた円柱状の軸支部１６と、ケース本体１２の外周に、例えば、１８０度の間隔で放射方向へ設けられ、取付孔１８を備えた取付フランジ１７とで構成されている。
そして、円筒壁部１４の内周には、中間部分から上端まで達するように円筒状に肉抜きされた、キャップ４１の下側外縁を受け止める拡径段部１４ａが設けられている。
なお、１５はケース本体１２内に形成された収容部を示し、シリコーンオイル２１を収容する部分であり、拡径段部１４ａから下側の部分に相当する。
The case 11 described above includes a case main body 12 provided with a cylindrical wall portion 14 around the outer edge of the bottom portion 13 having a circular planar shape, a columnar shaft support portion 16 provided at the center of the bottom portion 13, and a case main body. For example, it is provided on the outer periphery of 12 with a mounting flange 17 provided in the radial direction at intervals of 180 degrees and provided with mounting holes 18.
Further, on the inner periphery of the cylindrical wall portion 14, there is provided an enlarged diameter step portion 14 a that receives the lower outer edge of the cap 41 and is hollowed in a cylindrical shape so as to reach the upper end from the intermediate portion.
Reference numeral 15 denotes an accommodating portion formed in the case main body 12, which is a portion for accommodating the silicone oil 21, and corresponds to a lower portion from the enlarged diameter step portion 14a.
上記したローター３１は、円柱状の軸部３２と、この軸部３２から放射状に延出させた複数、この実施例では１８０度の間隔に設けられた２つの抵抗部３６と、この抵抗部３６に回転円周方向へ突出させて設けられた突出部３７とで構成されている。
そして、軸部３２には、底面にケース１１の軸支部１６が回転可能に係合する円筒形状の窪み３３が設けられ、キャップ４１から突出する部分に、ＩカットされたＩカット段部３４が設けられ、Ｉカットされた平面部分（垂直面）にそれぞれ水平方向の嵌合溝３５が設けられている。
The rotor 31 described above includes a cylindrical shaft portion 32, a plurality of radial portions extending from the shaft portion 32, in this embodiment, two resistance portions 36 provided at intervals of 180 degrees, and the resistance portion 36. And a projecting portion 37 provided so as to project in the rotational circumferential direction.
The shaft portion 32 is provided with a cylindrical recess 33 on the bottom surface to which the shaft support portion 16 of the case 11 is rotatably engaged, and an I-cut step portion 34 that is I-cut is provided at a portion protruding from the cap 41. A horizontal fitting groove 35 is provided in each I-cut plane portion (vertical surface).
なお、突出部３７の先端は、図２または図３に示すように、所定の間隔をあけて対向している（近接している）。
また、図３に示すように、突出部３７とケース１１あるいはキャップ４１との間隔ａを、抵抗部３６とケース１１あるいはキャップ４１との間隔ｂよりも狭くしてあり、また、突出部３７の先端と抵抗部３６との間隔ｃを、対向する突出部３７の間隔ｄよりも長くしてあり、対向する突出部３７の先端部は、先端方向へ窄まる形状とされている。
In addition, the front-end | tip of the protrusion part 37 is facing (adjacent) with the predetermined space | interval, as shown in FIG. 2 or FIG.
Further, as shown in FIG. 3, the distance a between the protrusion 37 and the case 11 or the cap 41 is narrower than the distance b between the resistance part 36 and the case 11 or the cap 41. The distance c between the distal end and the resistance portion 36 is longer than the distance d between the opposing projecting portions 37, and the distal end portion of the opposing projecting portion 37 is shaped to be constricted in the distal direction.
上記したキャップ４１には、中心に、ローター３１の軸部３２が貫通する貫通孔４２が設けられ、この貫通孔４２の下側に、下端まで達するように円筒状に肉抜きされた、Ｏリング５１を収容する拡径段部４３が設けられている。
また、被駆動歯車６１には、Ｉカット状の取付孔６２が中心に設けられ、この取付孔６２の平面部分に、ローター３１の軸部３２に設けた嵌合溝３５に嵌合する嵌合突条６３が設けられている。
The above-described cap 41 is provided with a through-hole 42 through which the shaft portion 32 of the rotor 31 penetrates at the center, and an O-ring is formed in a cylindrical shape below the through-hole 42 so as to reach the lower end. An enlarged diameter step portion 43 that accommodates 51 is provided.
Further, the driven gear 61 is provided with an I-cut mounting hole 62 at the center, and the flat portion of the mounting hole 62 is fitted into the fitting groove 35 provided in the shaft portion 32 of the rotor 31. A protrusion 63 is provided.
次に、回転ダンパーＤの組立の一例について説明する。
まず、ローター３１の軸部３２をＯリング５１に嵌め、窪み３３および抵抗部３６の部分にシリコーンオイル２１を塗布した後、窪み３３内へケース１１の軸支部１６を嵌合させるように、収容部１５内へ軸部３２の一部および抵抗部３６を収容する。
そして、収容部１５内へ適量のシリコーンオイル２１を注入した後、貫通孔４２内へ軸部３２を挿入しながらキャップ４１を円筒壁部１４内に嵌合させ、ケース１１の開口をキャップ４１で閉塞すると、キャップ４１は拡径段部１４ａに衝合する。
Next, an example of assembly of the rotary damper D will be described.
First, the shaft portion 32 of the rotor 31 is fitted into the O-ring 51, the silicone oil 21 is applied to the recess 33 and the resistance portion 36, and then the shaft support portion 16 of the case 11 is fitted into the recess 33. A part of the shaft portion 32 and the resistance portion 36 are accommodated in the portion 15.
Then, after injecting an appropriate amount of silicone oil 21 into the accommodating portion 15, the cap 41 is fitted into the cylindrical wall portion 14 while inserting the shaft portion 32 into the through hole 42, and the opening of the case 11 is opened with the cap 41. When closed, the cap 41 abuts the enlarged diameter step portion 14a.
このようにしてキャップ４１を拡径段部１４ａに衝合させると、円筒壁部１４内の空気Ａはほとんどケース１１外へ排出され、円筒壁部１４とキャップ４１とは密着するとともに、拡径段部４３内にＯリング５１が収容され、Ｏリング５１が軸部３２とキャップ４１との間からシリコーンオイル２１が漏れるのを防止する。
次に、円筒壁部１４とキャップ４１との間を、例えば、高周波ウェルダホーンで周回するように溶着して密閉する。
そして、キャップ４１から突出した軸部３２を被駆動歯車６１の取付孔６２内へ圧入させると、嵌合突条６３が嵌合溝３５に嵌合することにより、回転ダンパーＤの組立が終了する。
When the cap 41 is brought into contact with the enlarged diameter step portion 14a in this manner, the air A in the cylindrical wall portion 14 is almost discharged outside the case 11, the cylindrical wall portion 14 and the cap 41 are in close contact with each other, and the enlarged diameter is obtained. The O-ring 51 is accommodated in the stepped portion 43, and the O-ring 51 prevents the silicone oil 21 from leaking between the shaft portion 32 and the cap 41.
Next, the cylindrical wall portion 14 and the cap 41 are sealed by welding, for example, so as to circulate with a high-frequency welder horn.
Then, when the shaft portion 32 protruding from the cap 41 is press-fitted into the mounting hole 62 of the driven gear 61, the fitting protrusion 63 is fitted into the fitting groove 35, whereby the assembly of the rotary damper D is completed. .
次に、動作について説明する。
まず、図３に実線で示すように、ローター３１が時計方向へ回転すると、シリコーンオイル２１中で抵抗部３６が時計方向へ回転し、抵抗部３６にシリコーンオイル２１の粘性抵抗およびせん断抵抗が作用するので、ローター３１の回転を制動する。
したがって、ローター３１に取り付けられた被駆動歯車６１が噛み合う歯車、ラックなどの回転または移動を制動してその回転または移動をゆっくりとさせる。
このようにローター３１が時計方向へ回転するとき、抵抗部３６に突出部３７が回転円周方向へ突出させて設けられているので、組立時にケース１１内に空気Ａが混入しても、混入した空気Ａは、図３に実線で示すように、抵抗部３６の回転時に負圧の発生する突出部３７の後端部分に追従するように移動する。
Next, the operation will be described.
First, as shown by a solid line in FIG. 3, when the rotor 31 rotates clockwise, the resistance portion 36 rotates clockwise in the silicone oil 21, and the viscous resistance and shear resistance of the silicone oil 21 act on the resistance portion 36. Therefore, the rotation of the rotor 31 is braked.
Therefore, the rotation or movement of the gear, rack, or the like with which the driven gear 61 attached to the rotor 31 meshes is braked so that the rotation or movement is slow.
Thus, when the rotor 31 rotates in the clockwise direction, the protruding portion 37 is provided in the resistance portion 36 so as to protrude in the circumferential direction of the rotation. As shown by the solid line in FIG. 3, the air A thus moved moves so as to follow the rear end portion of the projecting portion 37 where a negative pressure is generated when the resistance portion 36 rotates.
そして、図３に点線で示すように、ローター３１が反時計方向へ回転すると、シリコーンオイル２１中で抵抗部３６が反時計方向へ回転し、抵抗部３６にシリコーンオイル２１の粘性抵抗およびせん断抵抗が作用するので、ローター３１の回転を制動する。
したがって、ローター３１に取り付けられた被駆動歯車６１が噛み合う歯車、ラックなどの回転または移動を制動してその回転または移動をゆっくりとさせる。
このようにローター３１が反時計方向へ回転するとき、抵抗部３６に突出部３７が回転円周方向へ突出させて設けられ、間隔ｃが間隔ｄよりも長くされているので、組立時にケース１１内に混入した空気Ａは、図３に点線で示すように、抵抗部３６側へ向かわずに、抵抗部３６の回転時に負圧の発生する突出部３７の後端部分に追従するように移動する。
3, when the rotor 31 rotates counterclockwise, the resistance portion 36 rotates counterclockwise in the silicone oil 21, and the viscous resistance and shear resistance of the silicone oil 21 are applied to the resistance portion 36. Acts to brake the rotation of the rotor 31.
Therefore, the rotation or movement of the gear, rack, or the like with which the driven gear 61 attached to the rotor 31 meshes is braked so that the rotation or movement is slow.
Thus, when the rotor 31 rotates in the counterclockwise direction, the protrusion 37 is provided in the resistance portion 36 so as to protrude in the rotation circumferential direction, and the interval c is longer than the interval d. As shown by the dotted line in FIG. 3, the air A mixed in does not move toward the resistance portion 36, but moves so as to follow the rear end portion of the protrusion 37 where negative pressure is generated when the resistance portion 36 rotates. To do.
上述したように、この発明の第１実施例によれば、抵抗部３６を軸部３２から放射状に延出させて２つ設け、この抵抗部３６に回転円周方向へ突出する突出部３７を設けるとともに、突出部３７の先端を、所定の間隔をあけて対向させたので、組立時にケース１１内に混入した空気Ａは、抵抗部３６の回転時に負圧の発生する突出部３７の後端部分に追従するように移動することにより、抵抗部３６を乗り越えなくなる。
したがって、ローター３１が双方向へ回転してもケース１１内に混入した空気Ａに起因する異音の発生を防止することができる。
また、突出部３７とケース１１あるいはキャップ４１との間隔ａを、抵抗部３６とケース１１あるいはキャップ４１との間隔ｂよりも狭くしたので、抵抗部３６の回転時に、突出部３７の後端部分に負圧が発生し易くなり、その部分にケース１１内に混入した空気Ａが溜まって突出部３７に追従して移動する。
したがって、ローター３１が双方向へ回転してもケース１１内に混入した空気Ａに起因する異音の発生をさらに防止することができる。
また、突出部３７の先端と抵抗部３６との間隔ｃを、対向する突出部３７の間隔ｄよりも長くしたので、ローター３１の回転が反転するとき、ケース１１内に混入した空気Ａは対向する突出部３７の一方から他方へ移り易くなる。
したがって、ローター３１が双方向へ回転してもケース１１内に混入した空気Ａに起因する異音の発生をさらに防止することができる。
そして、対向する突出部３７の先端部を、先端方向へ窄まる形状としたので、抵抗部３６の反回転時に、前回の抵抗部３６の回転時に突出部３７の後端部分に発生した負圧部（抵抗部３６の反転時の上流側に位置する突出部３７の上流側）から空気が離れ易くなる。
したがって、ローター３１が反回転するとき、ケース１１内に混入した空気Ａの移動がスムーズになる。
As described above, according to the first embodiment of the present invention, two resistance portions 36 are provided so as to extend radially from the shaft portion 32, and the protrusion portion 37 protruding in the rotation circumferential direction is provided on the resistance portion 36. Since the front end of the projecting portion 37 is opposed with a predetermined interval, the air A mixed in the case 11 during assembly is the rear end of the projecting portion 37 that generates a negative pressure when the resistance portion 36 rotates. By moving so as to follow the portion, the resistor portion 36 is not overcome.
Therefore, even if the rotor 31 rotates in both directions, it is possible to prevent the generation of abnormal noise due to the air A mixed in the case 11.
Further, since the distance a between the protruding portion 37 and the case 11 or the cap 41 is narrower than the distance b between the resistance portion 36 and the case 11 or the cap 41, the rear end portion of the protruding portion 37 is rotated when the resistance portion 36 rotates. A negative pressure is likely to be generated in the air, and the air A mixed in the case 11 accumulates in that portion and moves following the protruding portion 37.
Therefore, even if the rotor 31 rotates in both directions, it is possible to further prevent the generation of abnormal noise due to the air A mixed in the case 11.
Further, since the distance c between the tip of the projecting portion 37 and the resistance portion 36 is longer than the distance d between the projecting portions 37 facing each other, the air A mixed in the case 11 is opposed when the rotation of the rotor 31 is reversed. It becomes easy to move from one side of the protruding portion 37 to the other side.
Therefore, even if the rotor 31 rotates in both directions, it is possible to further prevent the generation of abnormal noise due to the air A mixed in the case 11.
And since the front-end | tip part of the protrusion part 37 which opposes was made into the shape constricted to a front-end | tip direction, the negative pressure which generate | occur | produced in the rear-end part of the protrusion part 37 at the time of the last rotation of the resistance part 36 at the time of reverse rotation of the resistance part 36 The air is easily separated from the portion (upstream side of the protruding portion 37 located on the upstream side when the resistance portion 36 is reversed).
Therefore, when the rotor 31 rotates counterclockwise, the movement of the air A mixed in the case 11 becomes smooth.
図４はこの発明の第２実施例である回転ダンパーを構成するローターの平面図であり、図１〜図３と同一または相当部分に同一符号を付して、その説明を省略する。 FIG. 4 is a plan view of a rotor constituting a rotary damper according to a second embodiment of the present invention. The same or corresponding parts as those in FIGS.
この第２実施例のローター３１が第１実施例のローター３１と異なる点は、抵抗部３６の外側に三日月状の突出部３７を設けた部分である。
なお、他の部分は、第１実施例と同じに構成されている。
この第２実施例においても、第１実施例と同様な効果を得ることができる。
The rotor 31 of the second embodiment is different from the rotor 31 of the first embodiment in that a crescent-shaped protrusion 37 is provided on the outside of the resistance portion 36.
The other parts are the same as in the first embodiment.
In the second embodiment, the same effects as in the first embodiment can be obtained.
上記した実施例では、ケース１１に軸支部１６を設け、軸部３２に窪み３３を設けてローター３１を回転可能に支持する例を示したが、ケースに窪みを設け、軸部に軸支部を設ける構成としてもよい。
そして、ハウジングをケース１１およびキャップ４１で構成し、ケース１１にシリコーンオイル２１の収容部１５を設け、ローター３１の軸部３２が貫通する貫通孔４２をキャップ４１に設け、キャップ４１と軸部３２との間からシリコーンオイル２１が漏れるのをＯリング５１で防止する構成とした例を示したが、キャップにシリコーンオイルの収容部を設け、ローターの軸部が貫通する貫通孔をケースに設け、ケースと軸部との間からシリコーンオイルが漏れるのをＯリングで防止する構成としてもよい。
また、複数の抵抗部３６を２つとした例を示したが、２つ以上であれば、３つでも、４つでもよい。
そして、軸部３２に抵抗部３６を一体成形した例を示したが、軸部と抵抗部とを別々に成形し、例えば、角軸と角孔との関係で一体的に回転するように構成してもよい。
さらに、粘性流体としてシリコーンオイル２１を用いた例を示したが、同様に機能する他の粘性流体、例えば、グリースなどを用いることもできる。
In the above embodiment, the case 11 is provided with the shaft support 16 and the shaft 32 is provided with the recess 33 to rotatably support the rotor 31. However, the case is provided with a recess and the shaft is provided with the shaft support. It is good also as a structure to provide.
The housing is composed of a case 11 and a cap 41, the case 11 is provided with the accommodating portion 15 of the silicone oil 21, the through hole 42 through which the shaft portion 32 of the rotor 31 passes is provided in the cap 41, and the cap 41 and the shaft portion 32 are provided. An example in which the O-ring 51 prevents the silicone oil 21 from leaking from between the two is shown. However, the cap is provided with a silicone oil accommodating portion, and a through hole through which the shaft portion of the rotor passes is provided in the case. It is good also as a structure which prevents that silicone oil leaks from between a case and a shaft part with an O-ring.
Moreover, although the example which made the some resistance part 36 two was shown, as long as it is two or more, three or four may be sufficient.
And although the example which formed the resistance part 36 integrally in the axial part 32 was shown, a axial part and a resistance part are shape | molded separately, for example, it is comprised so that it may rotate integrally by the relationship between a square axis and a square hole. May be.
Furthermore, although the example which used the silicone oil 21 as a viscous fluid was shown, the other viscous fluid which functions similarly, for example, grease etc., can also be used.
Ｄ 回転ダンパー
１１ ケース（ハウジング）
１２ ケース本体
１３ 底部
１４ 円筒壁部
１４ａ 拡径段部
１５ 収容部
１６ 軸支部
１７ 取付フランジ
１８ 取付孔
２１ シリコーンオイル（粘性流体）
３１ ローター
３２ 軸部
３３ 窪み
３４ Ｉカット段部
３５ 嵌合溝
３６ 抵抗部
３７ 突出部
４１ キャップ（ハウジング）
４２ 貫通孔
４３ 拡径段部
５１ Ｏリング（シール部材）
６１ 被駆動歯車
６２ 取付孔
６３ 嵌合突条
ａ〜ｄ 間隔
Ａ 空気
D Rotating damper 11 Case (housing)
DESCRIPTION OF SYMBOLS 12 Case main body 13 Bottom part 14 Cylindrical wall part 14a Diameter expansion step part 15 Storage part 16 Shaft support part 17 Mounting flange 18 Mounting hole 21 Silicone oil (viscous fluid)
31 Rotor 32 Shaft 33 Depression 34 I-cut Step 35 Fitting Groove 36 Resistor 37 Protrusion 41 Cap (Housing)
42 Through-hole 43 Expanded stepped portion 51 O-ring (seal member)
61 Driven gear 62 Mounting hole 63 Fitting protrusions a to d Interval A Air
Claims (4)
このハウジング内に収容された粘性流体と、
前記ハウジング内に収められ、前記ハウジングから一部が突出する軸部に前記ハウジング内の前記粘性流体中を移動する抵抗部が設けられたローターと、
前記軸部と前記ハウジングとの間から前記粘性流体が漏れるのを防止するシール部材と、
からなる回転ダンパーにおいて、
前記抵抗部を前記軸部から放射状に延出させて複数設け、
この抵抗部に回転円周方向へ突出する突出部を設けるとともに、この突出部の先端を、所定の間隔をあけて対向させた、
ことを特徴とする回転ダンパー。 A housing;
A viscous fluid contained in the housing;
A rotor housed in the housing and provided with a resistance part that moves in the viscous fluid in the housing on a shaft part of which protrudes from the housing;
A seal member for preventing the viscous fluid from leaking between the shaft portion and the housing;
In the rotary damper consisting of
A plurality of the resistance portions are provided to extend radially from the shaft portion,
While providing a protruding portion that protrudes in the rotational circumferential direction in the resistance portion, the tip of the protruding portion was opposed to the resistor portion at a predetermined interval.
Rotating damper characterized by that.
前記突出部と前記ハウジングとの間隔を、前記抵抗部と前記ハウジングとの間隔よりも狭くした、
ことを特徴とする回転ダンパー。 The rotary damper according to claim 1, wherein
The interval between the protruding portion and the housing is narrower than the interval between the resistor portion and the housing.
Rotating damper characterized by that.
前記突出部の先端と前記抵抗部との間隔を、前記対向する突出部の間隔よりも長くした、
ことを特徴とする回転ダンパー。 The rotary damper according to claim 1 or 2,
The interval between the tip of the protrusion and the resistance portion is longer than the interval between the opposing protrusions.
Rotating damper characterized by that.
前記対向する突出部の先端部を、先端方向へ窄まる形状とした、
ことを特徴とする回転ダンパー。 The rotary damper according to any one of claims 1 to 3,
The tip of the opposing protrusion is shaped to squeeze in the tip direction,
Rotating damper characterized by that.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003320957A JP4278143B2 (en) | 2003-09-12 | 2003-09-12 | Rotating damper |
| KR1020040070391A KR100584462B1 (en) | 2003-09-12 | 2004-09-03 | Rotary damper |
| TW093214297U TWM266386U (en) | 2003-09-12 | 2004-09-08 | Rotary damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003320957A JP4278143B2 (en) | 2003-09-12 | 2003-09-12 | Rotating damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005090534A true JP2005090534A (en) | 2005-04-07 |
| JP4278143B2 JP4278143B2 (en) | 2009-06-10 |
Family
ID=34452778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003320957A Expired - Fee Related JP4278143B2 (en) | 2003-09-12 | 2003-09-12 | Rotating damper |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4278143B2 (en) |
| KR (1) | KR100584462B1 (en) |
| TW (1) | TWM266386U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100934340B1 (en) | 2007-10-24 | 2009-12-29 | 가부시키가이샤 니프코 | Damper device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61146986A (en) * | 1984-12-21 | 1986-07-04 | 日本電気精器株式会社 | Brake apparatus of door closure |
| JPH01182643A (en) * | 1988-01-12 | 1989-07-20 | Nifco Inc | Rotary damper |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5211267A (en) | 1992-02-24 | 1993-05-18 | Prince Corporation | Temperature compensated rotary damper |
| JP4529059B2 (en) | 1999-10-19 | 2010-08-25 | トックベアリング株式会社 | Rotating damper |
| JP4181831B2 (en) | 2002-09-09 | 2008-11-19 | 株式会社ニフコ | damper |
-
2003
- 2003-09-12 JP JP2003320957A patent/JP4278143B2/en not_active Expired - Fee Related
-
2004
- 2004-09-03 KR KR1020040070391A patent/KR100584462B1/en not_active IP Right Cessation
- 2004-09-08 TW TW093214297U patent/TWM266386U/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61146986A (en) * | 1984-12-21 | 1986-07-04 | 日本電気精器株式会社 | Brake apparatus of door closure |
| JPH01182643A (en) * | 1988-01-12 | 1989-07-20 | Nifco Inc | Rotary damper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100934340B1 (en) | 2007-10-24 | 2009-12-29 | 가부시키가이샤 니프코 | Damper device |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM266386U (en) | 2005-06-01 |
| JP4278143B2 (en) | 2009-06-10 |
| KR20050027013A (en) | 2005-03-17 |
| KR100584462B1 (en) | 2006-05-26 |
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