JP6946380B2 - Angle position holding device - Google Patents

Angle position holding device Download PDF

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JP6946380B2
JP6946380B2 JP2019130532A JP2019130532A JP6946380B2 JP 6946380 B2 JP6946380 B2 JP 6946380B2 JP 2019130532 A JP2019130532 A JP 2019130532A JP 2019130532 A JP2019130532 A JP 2019130532A JP 6946380 B2 JP6946380 B2 JP 6946380B2
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peripheral surface
outer ring
inner ring
ring
holding device
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JP2021014898A (en
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太郎 磯部
太郎 磯部
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Origin Co Ltd
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Description

本発明は、中心軸の回りに回動可能となった物品を支持するための角度位置保持装置に関するものである。 The present invention relates to an angular position holding device for supporting an article that is rotatable around a central axis.

ワゴン車やワンボックス車等の車両の後端部に装着された跳ね上げ式のハッチバックには、電動モーターによって開閉動するものがある。下記特許文献1には、電動モーターによって全開位置と全閉位置との間を開閉動するハッチバックにおいて、ハッチバックを全開位置もしくは全開位置と全閉位置との間の中間位置で停止させた際に、電磁クラッチでハッチバックを保持することが開示されている。この開閉装置では、入力側機器である電動モーターの駆動が停止しても、出力側機器であるハッチバックは電磁クラッチによって保持されているため、ハッチバックが自重で落下することはない。 Some flip-up hatchbacks mounted on the rear end of vehicles such as wagons and one-box vehicles are opened and closed by an electric motor. According to Patent Document 1 below, in a hatchback that opens and closes between a fully open position and a fully closed position by an electric motor, when the hatchback is stopped at a fully open position or an intermediate position between the fully open position and the fully closed position, It is disclosed that the hatchback is held by an electromagnetic clutch. In this switchgear, even if the drive of the electric motor, which is an input side device, is stopped, the hatchback, which is an output side device, is held by the electromagnetic clutch, so that the hatchback does not fall by its own weight.

ところで、電気的な手段によることなく、ハッチバックの如き従動部材(出力側機器)を任意の角度位置で保持するための機構部品として、所謂トルクヒンジが存在する。トルクヒンジとは、回転体に対して所定の制動トルクを付与するヒンジ(蝶番)であり、回転体は、所定の制動トルク以上の付加トルクが作用すると回転可能である一方、付加トルクの作用が停止するとその角度位置で保持される。下記特許文献2には、本願に先立って出願された本出願人によるトルクヒンジの一例が示されている。 By the way, there is a so-called torque hinge as a mechanical component for holding a driven member (output side device) such as a hatchback at an arbitrary angle position without using electrical means. A torque hinge is a hinge that applies a predetermined braking torque to a rotating body, and the rotating body can rotate when an additional torque equal to or higher than a predetermined braking torque is applied, while the additional torque acts. When stopped, it is held at that angular position. Patent Document 2 below shows an example of a torque hinge filed by the applicant prior to the present application.

特開2006−265982号公報Japanese Unexamined Patent Publication No. 2006-265982 特許3592984号公報Japanese Patent No. 3592984

車両のハッチバックを電動モーターで駆動して開閉する開閉装置では、電動モーター等の機器を設置するスペースが限定されているため、開閉装置を構成する機器をなるべく小型化しコンパクト化することが好ましい。上記特許文献1の開閉装置には、入力側機器である電動モーターの停止時に、ハッチバックを保持するのに電磁クラッチを用いていることから、電磁クラッチを設置するための空間を要するとともに、電気配線や制御機構を別途構築する必要があり、コストがかかる。 In the switchgear that opens and closes the hatchback of the vehicle by driving it with an electric motor, the space for installing the device such as the electric motor is limited. Therefore, it is preferable to make the device constituting the switchgear as small and compact as possible. Since the switchgear of Patent Document 1 uses an electromagnetic clutch to hold the hatchback when the electric motor, which is an input side device, is stopped, a space for installing the electromagnetic clutch is required and electrical wiring is required. And the control mechanism needs to be constructed separately, which is costly.

一方、上記特許文献2に示されるトルクヒンジによれば、電磁クラッチを用いることなくハッチバックを任意の角度位置で保持することも可能となるが、通常、電動モーターの出力軸(シャフト)が直接ハッチバックの如き従動部材に連結されることはなく、電動モーターから延びる上記出力軸は適宜の継ぎ手を介してハッチバックの回転軸に連結される。継ぎ手を介して電動モーターの出力軸とハッチバックの回転軸とを同軸上に連結すると共に、電動モーターの出力軸及びハッチバックの回転軸のいずれか一方又はその両方に制動トルク付与手段による制動トルクを付与しようとすると、電動モーターの出力軸とハッチバックの回転軸との間の芯ずれによって、制動トルク付与手段の特定部位が偏って電動モーターの出力軸及びハッチバックの回転軸のいずれか一方又はその両方に作用することとなり、制動トルク付与手段の使用寿命が短縮されると共に、好ましくない振動や異音が発生する虞もある。 On the other hand, according to the torque hinge shown in Patent Document 2, it is possible to hold the hatchback at an arbitrary angle position without using an electromagnetic clutch, but usually, the output shaft (shaft) of the electric motor is directly hatchback. The output shaft extending from the electric motor is connected to the rotating shaft of the hatchback via an appropriate joint without being connected to the driven member as in the above. The output shaft of the electric motor and the rotation shaft of the hatchback are coaxially connected via a joint, and braking torque is applied to either one or both of the output shaft of the electric motor and the rotation shaft of the hatchback by the braking torque applying means. When attempting to do so, due to the misalignment between the output shaft of the electric motor and the rotation shaft of the hatchback, the specific part of the braking torque applying means is biased to one or both of the output shaft of the electric motor and the rotation shaft of the hatchback. As a result, the service life of the braking torque applying means is shortened, and there is a possibility that undesired vibration or abnormal noise may occur.

本発明は上記事実を踏まえてなされたものであり、その主たる技術的課題は、車両用ハッチバックの開閉装置などに用いられる、入力側機器から回転トルクが入力されないときに制動トルクを付与して出力側機器の角度位置を保持する角度位置保持装置において、入力側機器の軸部と出力側機器の軸部との間で芯ずれが生じても、制動トルク付与手段の特定部位が偏って電動モーターの出力軸及びハッチバックの回転軸のいずれか一方又はその両方に作用することのない、新規の角度位置保持装置を提供することにある。 The present invention has been made based on the above facts, and its main technical problem is to apply a braking torque and output when a rotational torque is not input from an input side device used for an opening / closing device for a hatchback for a vehicle. In the angle position holding device that holds the angular position of the side device, even if the shaft of the input side device and the shaft of the output side device are misaligned, the specific part of the braking torque applying means is biased and the electric motor. It is an object of the present invention to provide a novel angle position holding device that does not act on either one or both of the output shaft and the rotation shaft of the hatchback.

本発明者は、鋭意検討の結果、ハウジングの内側に、軸状の内輪及び外輪と、摩擦によって外輪に対して所定の制動トルクを付与する制動トルク付与手段とを配置し、内輪の内側に入力側機器の軸部及び出力側機器の軸部を共通して挿通し、内輪は入力側機器の軸部及び出力側機器の軸部と一体となって回転可能するようにし、内輪の外周面と外輪の内周面との間に、内輪の外周面及び外輪の内周面のいずれか一方又はその両方と密着して変形可能な突出部が周方向に複数設けられた接続部材を配設することによって、上記主たる技術的課題が解決されることを見出した。 As a result of diligent studies, the present inventor has arranged a shaft-shaped inner ring and an outer ring and a braking torque applying means for applying a predetermined braking torque to the outer ring by friction, and inputs the brake torque to the inside of the inner ring. The shaft of the side device and the shaft of the output side device are inserted in common, and the inner ring can rotate integrally with the shaft of the input side device and the shaft of the output side device, and is connected to the outer peripheral surface of the inner ring. A connecting member is provided between the inner peripheral surface of the outer ring and a plurality of projecting portions that are in close contact with one or both of the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring and are deformable in the circumferential direction. By doing so, it was found that the above-mentioned main technical problems can be solved.

即ち、本発明によれば、上記主たる技術的課題を達成する角度位置保持装置として、入力側機器から回転トルクが入力されないときは、制動トルクを付与して出力側機器の角度位置を保持する角度位置保持装置であって、
固定のハウジングを具備し、
前記ハウジングの内側には、軸状の内輪と、前記内輪の外周面を囲繞する軸状の外輪と、前記外輪の外周面との摩擦によって前記外輪に対して所定の制動トルクを付与する制動トルク付与手段とが設けられており、
前記内輪の内側には、入力側機器の軸部及び出力側機器の軸部が共通して挿通され、前記内輪は入力側機器の軸部及び出力側機器の軸部と一体となって回転可能であり、
前記内輪の外周面と前記外輪の内周面との間には、断面が周状乃至環状であって、前記内輪と前記外輪とを一体的に接続する接続部材が配設され、前記接続部材には、前記内輪の外周面及び前記外輪の内周面のいずれか一方又はその両方と密着して変形可能な突出部が周方向に複数設けられている、ことを特徴とする角度位置保持装置、ことを特徴とする角度位置保持装置が提供される。
That is, according to the present invention, as an angle position holding device that achieves the above-mentioned main technical problem, when a rotational torque is not input from the input side device, an angle that applies braking torque to hold the angle position of the output side device. It is a position holding device
Equipped with a fixed housing,
Inside the housing, a braking torque that applies a predetermined braking torque to the outer ring by friction between the shaft-shaped inner ring, the shaft-shaped outer ring surrounding the outer peripheral surface of the inner ring, and the outer peripheral surface of the outer ring. There is a means of granting,
The shaft portion of the input side device and the shaft portion of the output side device are commonly inserted inside the inner ring, and the inner ring can rotate integrally with the shaft portion of the input side device and the shaft portion of the output side device. And
A connecting member having a circumferential to annular cross section and integrally connecting the inner ring and the outer ring is disposed between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring. Is provided with a plurality of projecting portions in the circumferential direction that are in close contact with one or both of the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring and are deformable. An angle position holding device is provided.

好ましくは、前記接続部材は前記内輪の軸方向長さと同一である。前記突出部は前記接続部材の軸方向にも延在するのが好適である。前記制動トルク付与手段は、コイルばねによって径方向内側に付勢されて前記外輪の外周面を押圧する押圧片を備えているのがよい。この場合には、前記押圧片は軸方向及び周方向のいずれか一方又はその両方に間隔をおいて複数設けられているのがよい。そして、前記押圧片の径方向内側端面には、縦断面が径方向内側に向かって凸弧状の押圧面が形成されていると共に、前記外輪の外周面には、前記押圧面と対応する凹弧状の被押圧溝が環状に形成されているのが好適である。 Preferably, the connecting member has the same axial length as the inner ring. It is preferable that the protruding portion extends in the axial direction of the connecting member. The braking torque applying means may include a pressing piece that is urged inward in the radial direction by a coil spring to press the outer peripheral surface of the outer ring. In this case, it is preferable that a plurality of the pressing pieces are provided at intervals in either one of the axial direction and the circumferential direction, or both of them. The radial inner end surface of the pressing piece is formed with a pressing surface having a convex arc shape with a vertical cross section inward in the radial direction, and the outer peripheral surface of the outer ring has a concave arc shape corresponding to the pressing surface. It is preferable that the pressed groove of the above is formed in an annular shape.

本発明の角度位置保持装置では、軸状の内輪とこれを囲繞する軸状の外輪とが配置され、内輪の外周面と外輪の内周面との間には、断面が周状乃至環状であって、内輪と外輪とを一体的に接続する接続部材が配設されており、接続部材には、内輪の外周面及び外輪の内周面のいずれか一方又はその両方と密着して変形可能な突出部が周方向に複数設けられている。そのため、内輪の内側に入力側機器の軸部及び出力側機器の軸部が共通して挿通されてこれらと内輪とが一体的に連結された際、入力側部材の軸部と出力側部材の軸部との間の芯ずれによって内輪の中心軸が外輪の中心軸に対して変位若しくは傾斜した場合であっても、接続部材に設けられた突出部が変形することで、外輪は、中心軸が変位若しくは傾斜することなく、内輪と一体的に連結される。これにより、外輪と、これの外周面に作用する制動トルク付与手段との間の相対的な位置関係が変化することは抑制され、外輪が回転した際に、制動トルク付与手段の特定部位が偏って外輪の外周面に作用して制動トルク付与手段の使用寿命が短縮してしまうことや、余計な振動や異音が発生してしまうことが防止される。 In the angle position holding device of the present invention, a shaft-shaped inner ring and a shaft-shaped outer ring surrounding the shaft-shaped inner ring are arranged, and the cross section is circumferential or annular between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring. Therefore, a connecting member for integrally connecting the inner ring and the outer ring is provided, and the connecting member can be deformed in close contact with either one or both of the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring. A plurality of protruding portions are provided in the circumferential direction. Therefore, when the shaft portion of the input side device and the shaft portion of the output side device are commonly inserted inside the inner ring and these and the inner ring are integrally connected, the shaft portion of the input side member and the shaft portion of the output side member Even if the central axis of the inner ring is displaced or tilted with respect to the central axis of the outer ring due to misalignment with the shaft portion, the protruding portion provided on the connecting member is deformed, so that the outer ring becomes the central axis. Is integrally connected to the inner ring without displacement or tilting. As a result, the relative positional relationship between the outer ring and the braking torque applying means acting on the outer peripheral surface of the outer ring is suppressed from changing, and when the outer ring rotates, the specific portion of the braking torque applying means is biased. This prevents the braking torque applying means from acting on the outer peripheral surface of the outer ring and shortening the service life of the braking torque applying means, and preventing unnecessary vibration and abnormal noise from being generated.

本発明に従って構成される角度位置保持装置の使用形態の一例を模式的に示す図。The figure which shows typically an example of the usage form of the angle position holding device configured according to this invention. 本発明に従って構成された角度位置保持装置の好適実施形態を示す図。The figure which shows the preferable embodiment of the angle position holding device configured according to this invention. 図2に示す角度位置保持装置の分解斜視図。An exploded perspective view of the angle position holding device shown in FIG. 図2に示す角度位置保持装置のハウジングを単体で示す図。The figure which shows the housing of the angle position holding device shown in FIG. 2 by itself. 図4に示すハウジングの斜視図。FIG. 4 is a perspective view of the housing shown in FIG. 図2に示す角度位置保持装置の内輪を単体で示す図。The figure which shows the inner ring of the angle position holding device shown in FIG. 2 by itself. 図2に示す角度位置保持装置の外輪を単体で示す図。The figure which shows the outer ring of the angle position holding device shown in FIG. 2 by itself. 図2に示す角度位置保持装置の接続部材を単体で示す図。The figure which shows the connection member of the angle position holding device shown in FIG. 2 by itself. 図2に示す角度位置保持装置の制動トルク付与手段の押圧片を単体で示す図。FIG. 2 is a diagram showing a single pressing piece of the braking torque applying means of the angle position holding device shown in FIG. 図2に示す角度位置保持装置の制動トルク付与手段のリテーナを単体で示す図。FIG. 2 is a diagram showing a retainer of the braking torque applying means of the angle position holding device shown in FIG. 2 as a single unit. 図10に示すリテーナの斜視図。FIG. 10 is a perspective view of the retainer shown in FIG.

以下、添付した図面を参照して本発明の角度位置保持装置の好適実施形態について更に説明する。 Hereinafter, preferred embodiments of the angle position holding device of the present invention will be further described with reference to the attached drawings.

先ず、図1を参照して本発明の角度位置保持装置の使用形態の一例を模式的に説明する。本発明に従って構成される、番号2で示される角度位置保持装置は、車両のフレームの如き固定部材Fに適宜の固定具Bによって固定され、電動モーターの如き駆動源Mの軸部Ma(シャフト)、及びハッチバックの如き従動部材Hの軸部Haが接続される。駆動源Mからの回転は、角度位置保持装置2を介して軸部Maから軸部Haに変速することなく伝達され、軸部Haは適宜の伝達系Dを介して従動部材Hを回動させる。 First, an example of a usage pattern of the angle position holding device of the present invention will be schematically described with reference to FIG. The angle position holding device indicated by No. 2 configured according to the present invention is fixed to a fixing member F such as a frame of a vehicle by an appropriate fixture B, and a shaft portion Ma (shaft) of a drive source M such as an electric motor. , And the shaft portion Ha of the driven member H such as a hatchback is connected. The rotation from the drive source M is transmitted from the shaft portion Ma to the shaft portion Ha via the angle position holding device 2 without shifting, and the shaft portion Ha rotates the driven member H via an appropriate transmission system D. ..

次に、図2及び図3を参照して本発明に従って構成された角度位置保持装置2について説明する。本発明に従って構成された角度位置保持装置2は、ハウジング4と、このハウジング4の内側に配置された、軸状の内輪6及び外輪8と、外輪8に対して所定の制動トルクを付与する制動トルク付与手段10とを具備している。ハウジング4が、上述した適宜の固定具Bによって固定部材Fに固定される。図2の断面図においては、容易に理解できるよう、内輪6、及び制動トルク付与手段10の後述するリテーナ(62)にのみハッチングを、外輪8に薄墨を夫々付して示している。 Next, the angle position holding device 2 configured according to the present invention will be described with reference to FIGS. 2 and 3. The angle position holding device 2 configured according to the present invention is a brake that applies a predetermined braking torque to the housing 4, the axial inner ring 6 and the outer ring 8 arranged inside the housing 4, and the outer ring 8. It is provided with a torque applying means 10. The housing 4 is fixed to the fixing member F by the appropriate fixing tool B described above. In the cross-sectional view of FIG. 2, for easy understanding, hatching is shown only on the inner ring 6 and the retainer (62) described later of the braking torque applying means 10, and light ink is attached to the outer ring 8, respectively.

主に図4を参照して説明を続けると、ハウジング4は、全体的に円形の端板12と、端板12の外周縁に接続されてこれに対して実質上垂直に軸方向に延びる円筒形状の外周壁14とを備えている。端板12の中央には、駆動源Mの軸部Ma又は従動部材Hの軸部Haのいずれか一方が挿通されてこれを回転可能に支持する円形の貫通穴16が形成されている。端板12の軸方向片側(同図のA−A断面において右側)面の外周縁部には、扇状の凹部18が周方向に等間隔をおいて6個形成されている。端板12には、軸方向に突出する一対の突出片20も形成されている。端板12の軸方向他側(同図のA−A断面において左側)面の中央には、貫通穴16と同軸上に円形の凹部22が形成されている。図4と共に図5を参照することによって理解されるとおり、径方向に見て凹部22の径方向外側には、略V字状の支持壁24が周方向に等角度間隔をおいて6個形成されている。支持壁24の基端部、つまりV字の付け根は径方向内側に位置し、全ての支持壁24の径方向内側端面は共通の円周面上に位置する。そして、これら支持壁24の径方向内側端面と凹部22は共に外輪8の軸方向片端部を回転可能に支持する。周方向に隣接する2つの支持壁24の間には、径方向に直線状延びるガイド溝26が規定されている。外周壁14の内周面には、軸方向に直線状に延びる断面半円形状の係止突条28が周方向に等角度間隔をおいて3個設けられている。外周壁14の軸方向他端部には環状溝30及び係止突起32が形成されており、環状溝30の内側にシールド板34が嵌め合わされることで、ハウジング4の内側は閉塞される(図2及び図3も参照されたい)。 Continuing the description mainly with reference to FIG. 4, the housing 4 has an overall circular end plate 12 and a cylinder connected to the outer peripheral edge of the end plate 12 and extending substantially perpendicular to the outer peripheral edge of the end plate 12 in the axial direction. It is provided with an outer peripheral wall 14 having a shape. A circular through hole 16 is formed in the center of the end plate 12 through which either the shaft portion Ma of the drive source M or the shaft portion Ha of the driven member H is inserted and rotatably supports the shaft portion Ma. Six fan-shaped recesses 18 are formed at equal intervals in the circumferential direction on the outer peripheral edge of the one side of the end plate 12 in the axial direction (on the right side in the AA cross section in the figure). A pair of projecting pieces 20 projecting in the axial direction are also formed on the end plate 12. A circular recess 22 is formed coaxially with the through hole 16 at the center of the other side of the end plate 12 in the axial direction (left side in the AA cross section in the figure). As can be understood by referring to FIG. 5 together with FIG. 4, six substantially V-shaped support walls 24 are formed at equal angular intervals in the circumferential direction on the radial outer side of the recess 22 when viewed in the radial direction. Has been done. The base end portion of the support wall 24, that is, the V-shaped base is located radially inward, and the radial inner end faces of all the support walls 24 are located on a common circumferential surface. The radial inner end surface and the recess 22 of the support wall 24 both rotatably support one end of the outer ring 8 in the axial direction. A guide groove 26 extending linearly in the radial direction is defined between the two support walls 24 adjacent to each other in the circumferential direction. On the inner peripheral surface of the outer peripheral wall 14, three locking ridges 28 having a semicircular cross section extending linearly in the axial direction are provided at equal angular intervals in the circumferential direction. An annular groove 30 and a locking projection 32 are formed at the other end of the outer peripheral wall 14 in the axial direction, and the inside of the housing 4 is closed by fitting the shield plate 34 inside the annular groove 30 ( See also FIGS. 2 and 3).

図2及び図3を参照して説明すると、シールド板34は円板形状であってその中央には外輪8の軸方向他端部が挿通されてこれを回転可能に軸支する貫通穴36が形成されている。シールド板34の内周面には径方向内側に突出し、外輪8の軸方向他端部を軸方向に係止する係止突起38が形成されている。シールド板34の外周面には径方向外方に突出する環状突条40が形成されている。シールド板34はハウジング4の軸方向他端(開放された側の軸方向端)においてこれに対し軸方向片側に向かって強制されることで、環状突条40がハウジング4の係止突起32を弾性的に乗り越えて環状溝30の内側に嵌め合わされる。 Explaining with reference to FIGS. 2 and 3, the shield plate 34 has a disk shape, and a through hole 36 through which the other end in the axial direction of the outer ring 8 is inserted and rotatably supports the shield plate 34 is formed in the center thereof. It is formed. A locking projection 38 is formed on the inner peripheral surface of the shield plate 34 so as to project inward in the radial direction and vertically lock the other end of the outer ring 8 in the axial direction. An annular ridge 40 is formed on the outer peripheral surface of the shield plate 34 so as to project outward in the radial direction. The shield plate 34 is forced toward one side in the axial direction at the other end in the axial direction (the axial end on the open side) of the housing 4, so that the annular ridge 40 locks the locking projection 32 of the housing 4. It elastically overcomes and is fitted inside the annular groove 30.

図2と共に図6を参照して説明すると、内輪6は円筒形状であって、その外周面の断面は円形である。一方、内輪6の内周面には内歯歯型42が周方向全体に亘って形成されている。内歯歯形42は内輪6の軸方向全体に亘って延在している(図2のA−A断面を参照されたい)。図示の実施形態にあっては、内歯歯形42はインボリュート歯形である。そして、内輪6の内側の軸方向他端部(図2のA−A断面において左側)には入力側機器(駆動源M)の軸部Maが、軸方向他端部(図2のA−A断面において右側)には出力側機器(従動部材H)の軸部Haが夫々挿通され、内輪6は入力側機器の軸部Ma及び出力側機器の軸部Haと一体となって回転可能となる。従って、軸部Ma及び軸部Haの外周面には内歯歯形42と対応する外歯歯形(インボリュート歯形)が形成されており、これら外歯歯形が内歯歯形42と噛み合うことで軸部Maと内輪6とが、軸部Haと内輪6とが夫々結合される。 Explaining with reference to FIG. 6 together with FIG. 2, the inner ring 6 has a cylindrical shape, and the cross section of the outer peripheral surface thereof is circular. On the other hand, an internal tooth mold 42 is formed on the inner peripheral surface of the inner ring 6 over the entire circumferential direction. The internal tooth profile 42 extends over the entire axial direction of the inner ring 6 (see the AA cross section of FIG. 2). In the illustrated embodiment, the internal tooth profile 42 is an involute tooth profile. Then, the axial end Ma of the input side device (drive source M) is located at the other end in the axial direction (left side in the AA cross section of FIG. 2) inside the inner ring 6, and the other end in the axial direction (A- in FIG. 2). The shaft portion Ha of the output side device (driven member H) is inserted into the right side in the A cross section, respectively, and the inner ring 6 can rotate integrally with the shaft portion Ma of the input side device and the shaft portion Ha of the output side device. Become. Therefore, an external tooth profile (involute tooth profile) corresponding to the internal tooth profile 42 is formed on the outer peripheral surfaces of the shaft portion Ma and the shaft portion Ha, and the external tooth profile meshes with the internal tooth profile 42 to form the shaft portion Ma. And the inner ring 6, and the shaft portion Ha and the inner ring 6 are connected to each other.

図2及び図3と共に図7を参照して説明すると、外輪8は全体的に円筒形状であるが、その軸方向中間部の外周面には、環状の被押圧溝44が軸方向に等間隔をおいて4個形成されている。何れの被押圧溝44も断面は凹弧状である。外輪8の軸方向両端部は円筒形状である。外輪8の軸方向他端部(図7のA−A断面における左側端部)の外径は幾分低減されており、軸方向に対して実質上垂直な円環状の係止面46が形成されている。係止面46はシールド板34の係止突起38によって係止される。外輪8の軸方向他端部の内周面には、径方向内側に突出する円環形状の支持片48が形成されている。支持片48は、外輪8の内側に挿通される内輪6の軸方向他端を支持する。なお、外輪8の内周面は軸方向全体に亘って断面円形である。 Explaining with reference to FIG. 7 together with FIGS. 2 and 3, the outer ring 8 has a cylindrical shape as a whole, but annular pressed grooves 44 are equidistant in the axial direction on the outer peripheral surface of the intermediate portion in the axial direction. 4 pieces are formed. Each of the pressed grooves 44 has a concave arc shape in cross section. Both ends of the outer ring 8 in the axial direction have a cylindrical shape. The outer diameter of the other end of the outer ring 8 in the axial direction (the left end in the AA cross section of FIG. 7) is somewhat reduced, and an annular locking surface 46 substantially perpendicular to the axial direction is formed. Has been done. The locking surface 46 is locked by the locking projection 38 of the shield plate 34. An annular support piece 48 projecting inward in the radial direction is formed on the inner peripheral surface of the other end of the outer ring 8 in the axial direction. The support piece 48 supports the other end of the inner ring 6 inserted inside the outer ring 8 in the axial direction. The inner peripheral surface of the outer ring 8 has a circular cross section over the entire axial direction.

図2に示すとおり、外輪8の内側には内輪6が挿通され、内輪6と外輪8とは図8に示される接続部材50によって一体的に接続される。図示の実施形態においては、接続部材50は金属製の薄板を適宜の機械加工することによって周状に形成され、その断面は略正6角形である。そのため、接続部材50の周方向所定位置には、軸方向に延びる隙間52が形成されている。所望ならば、接続部材50の断面は環状であってもよい。また、図示の実施形態においては、接続部材50の軸方向長さは内輪6の軸方向長さと実質上同一である。接続部材50には、内輪6の外周面及び外輪8の内周面のいずれか一方又はその両方と密着して変形可能な突出部が周方向に連続して複数設けられる。図示の実施形態においては、接続部材50の断面には、直線状乃至径方向外方に幾分突出する弧状の角部54(突出部)が周方向に等角度間隔をおいて6個設けられている。また、周方向に隣接する2つの角部54の間には、径方向内側に幾分突出する辺部56(突出部)が設けられている。角部54及び辺部56は共に軸方向全体に亘っても延在しており、図2のB−B断面を参照することによって理解されるとおり、内輪6の外周面と外輪8の内周面との間に接続部材50が配設されると、角部54が外輪8の内周面に、辺部56が内輪6の外周面に夫々密着することとなり、かかる密着によって内輪6と外輪8とは一体的に接続される。接続部材50を介した、内輪6と外輪8との接続については後に更に言及する。 As shown in FIG. 2, the inner ring 6 is inserted inside the outer ring 8, and the inner ring 6 and the outer ring 8 are integrally connected by the connecting member 50 shown in FIG. In the illustrated embodiment, the connecting member 50 is formed in a circumferential shape by appropriately machining a thin metal plate, and its cross section is a substantially regular hexagon. Therefore, a gap 52 extending in the axial direction is formed at a predetermined position in the circumferential direction of the connecting member 50. If desired, the cross section of the connecting member 50 may be annular. Further, in the illustrated embodiment, the axial length of the connecting member 50 is substantially the same as the axial length of the inner ring 6. The connecting member 50 is provided with a plurality of projecting portions that are in close contact with one or both of the outer peripheral surface of the inner ring 6 and the inner peripheral surface of the outer ring 8 and can be deformed continuously in the circumferential direction. In the illustrated embodiment, the cross section of the connecting member 50 is provided with six arc-shaped corners 54 (protruding portions) that are linear or project slightly outward in the radial direction at equal angular intervals in the circumferential direction. ing. Further, between the two corner portions 54 adjacent to each other in the circumferential direction, a side portion 56 (protruding portion) that protrudes slightly inward in the radial direction is provided. Both the corner portion 54 and the side portion 56 extend over the entire axial direction, and as can be understood by referring to the BB cross section of FIG. 2, the outer peripheral surface of the inner ring 6 and the inner circumference of the outer ring 8 When the connecting member 50 is disposed between the surface, the corner portion 54 is brought into close contact with the inner peripheral surface of the outer ring 8 and the side portion 56 is brought into close contact with the outer peripheral surface of the inner ring 6, respectively. It is integrally connected to 8. The connection between the inner ring 6 and the outer ring 8 via the connecting member 50 will be further described later.

続いて、制動トルク付与手段10について、図2及び図3を参照して説明する。図示の実施形態においては、制動トルク付与手段10は、外輪8の外周面を押圧する押圧片58と、これを径方向内側に付勢するコイルばね60と、押圧片58及びコイルばね60を支持するリテーナ62とを備えている。 Subsequently, the braking torque applying means 10 will be described with reference to FIGS. 2 and 3. In the illustrated embodiment, the braking torque applying means 10 supports a pressing piece 58 that presses the outer peripheral surface of the outer ring 8, a coil spring 60 that urges the pressing piece 58 inward in the radial direction, and the pressing piece 58 and the coil spring 60. It is equipped with a retainer 62.

図2と共に図9を参照して説明すると、押圧片58は、コイルばね60の内側に挿通されてこれによって支持される円柱形状の軸部64を具備している。軸部64の先端には、コイルばね60によって押圧される円板形状の主部66が固着されている。軸部64が固着された側とは反対側の主部66の端面の中央には、軸部64とは反対側に膨出する膨出部が設けられており、その表面に押圧面68が形成されている。押圧面68の縦断面形状は凸弧状であって、その曲率は外輪8の外周面に形成された凹弧状の被押圧溝44の断面の曲率と同一若しくはこれよりも大きい。 Explaining with reference to FIG. 9, the pressing piece 58 includes a cylindrical shaft portion 64 that is inserted and supported inside the coil spring 60. A disk-shaped main portion 66 pressed by the coil spring 60 is fixed to the tip of the shaft portion 64. A bulging portion that bulges to the side opposite to the shaft portion 64 is provided at the center of the end surface of the main portion 66 on the side opposite to the side to which the shaft portion 64 is fixed, and the pressing surface 68 is provided on the surface thereof. It is formed. The vertical cross-sectional shape of the pressing surface 68 is a convex arc shape, and the curvature thereof is the same as or larger than the curvature of the cross section of the concave arc-shaped pressed groove 44 formed on the outer peripheral surface of the outer ring 8.

図2と共に図10及び図11を参照して説明すると、リテーナ62は、略円環状の基板70を具備する。基板70には、略V字状の支持壁72が周方向に等角度間隔をおいて6個形成されており、周方向に隣接する支持壁72の間には、径方向に直線状に延びるガイド溝74が規定されている。かような支持壁72及びガイド溝74は、外輪8に設けられた支持壁24及びガイド溝26と実質上同一であるため詳細な説明は省略する。ただし、支持壁72の外周面には、外輪8の外周壁14の内周面に設けられた係止突条28が嵌り込む係止溝76が形成されている。 Explaining with reference to FIGS. 10 and 11 together with FIG. 2, the retainer 62 includes a substantially annular substrate 70. Six substantially V-shaped support walls 72 are formed on the substrate 70 at equal angular intervals in the circumferential direction, and extend linearly in the radial direction between the support walls 72 adjacent to each other in the circumferential direction. The guide groove 74 is defined. Since such a support wall 72 and a guide groove 74 are substantially the same as the support wall 24 and the guide groove 26 provided on the outer ring 8, detailed description thereof will be omitted. However, on the outer peripheral surface of the support wall 72, a locking groove 76 into which the locking ridge 28 provided on the inner peripheral surface of the outer peripheral wall 14 of the outer ring 8 is fitted is formed.

図2及び図3を参照して上述した各構成部品をハウジング4の内側に配置して組み合わせた状態について説明する。
制動トルク付与手段10は、上述したリテーナ62のガイド溝74に押圧片58及びコイルばね60が配置された状態でハウジング4の内側に配置される。この際、リテーナ62の係止溝76にハウジング4の係止突条28が嵌り込むことで、リテーナ62はハウジング4に対し回転不能となる。リテーナ62の内側には外輪8が配置され、コイルばね60によって径方向内側に付勢された押圧片58が外輪8の外周面に押し付けられることで、外輪8には摩擦による所定の制動トルクが付与される。図示の実施形態においては、上述したリテーナ62(これに装着された押圧片58及びコイルばね60も含む)は軸方向に3個並列して配置されており、夫々の押圧片58に形成された押圧面68が外輪8の外周面に形成された被押圧溝44に押し付けられる。この際、押圧面68の縦断面形状が径方向内側に向かって凸弧状であると共に、被押圧溝44の縦断面形状が上記押圧面68と対応する凹弧状であることに起因して、押圧片58によって外輪8は軸方向への移動が規制され、これにより装置全体の挙動が安定することとなる。なお、押圧片58及びコイルばね60はハウジング4に設けられたガイド溝26にも配置される。ハウジング4に配置された押圧片58もリテーナ62に配置された押圧片58と同様の作用効果を奏し、これも制動トルク付与手段10の一部を構成する。
A state in which the above-mentioned components are arranged inside the housing 4 and combined with reference to FIGS. 2 and 3 will be described.
The braking torque applying means 10 is arranged inside the housing 4 with the pressing piece 58 and the coil spring 60 arranged in the guide groove 74 of the retainer 62 described above. At this time, the locking ridge 28 of the housing 4 is fitted into the locking groove 76 of the retainer 62, so that the retainer 62 cannot rotate with respect to the housing 4. An outer ring 8 is arranged inside the retainer 62, and a pressing piece 58 urged inward in the radial direction by the coil spring 60 is pressed against the outer peripheral surface of the outer ring 8, so that a predetermined braking torque due to friction is applied to the outer ring 8. Granted. In the illustrated embodiment, three retainers 62 (including the pressing piece 58 and the coil spring 60 attached thereto) described above are arranged in parallel in the axial direction, and are formed on the respective pressing pieces 58. The pressing surface 68 is pressed against the pressed groove 44 formed on the outer peripheral surface of the outer ring 8. At this time, the vertical cross-sectional shape of the pressing surface 68 is a convex arc shape inward in the radial direction, and the vertical cross-sectional shape of the pressed groove 44 is a concave arc shape corresponding to the pressing surface 68. The piece 58 restricts the movement of the outer ring 8 in the axial direction, which stabilizes the behavior of the entire device. The pressing piece 58 and the coil spring 60 are also arranged in the guide groove 26 provided in the housing 4. The pressing piece 58 arranged in the housing 4 also has the same effect as the pressing piece 58 arranged in the retainer 62, which also constitutes a part of the braking torque applying means 10.

図2と共に図1を参照して、本発明の角度位置保持装置2の作動について説明する。
駆動源Mによって軸部Maが回転すると、内輪6及び出力側機器(従動部材H)の軸部Haが一体となって回転し、駆動源Mからの回転が従動部材Hに伝達され、ハッチバックの如き従動部材Hは開閉動することとなる。この際、接続部材50によって内輪6と一体的に接続された外輪8は制動トルク付与手段10からの制動トルク(押圧片58の押圧面58と外輪8の被押圧溝44との摩擦による)に抗して回転する。そして、駆動源Mによる軸部Maの回転が停止すると、制動トルク付与手段10によって付与される上記所定の制動トルクによって、外輪8の回転が規制される。これにより、内輪6の回転も制限され、出力側機器の軸部Haに接続されたハッチバックの如き従動部材Hの角度位置が保持される。かくして、駆動源M(電動モーター)の停止時に、電磁クラッチ等を用いることなく、ハッチバックの如き従動部材Hの角度位置を保持することが可能となる。
The operation of the angle position holding device 2 of the present invention will be described with reference to FIG.
When the shaft portion Ma is rotated by the drive source M, the inner ring 6 and the shaft portion Ha of the output side device (driven member H) are integrally rotated, and the rotation from the drive source M is transmitted to the driven member H to be used for the hatchback. Such a driven member H will open and close. At this time, the outer ring 8 integrally connected to the inner ring 6 by the connecting member 50 receives the braking torque from the braking torque applying means 10 (due to the friction between the pressing surface 58 of the pressing piece 58 and the pressed groove 44 of the outer ring 8). Rotate against. Then, when the rotation of the shaft portion Ma by the drive source M is stopped, the rotation of the outer ring 8 is regulated by the predetermined braking torque applied by the braking torque applying means 10. As a result, the rotation of the inner ring 6 is also restricted, and the angular position of the driven member H such as the hatchback connected to the shaft portion Ha of the output side device is maintained. Thus, when the drive source M (electric motor) is stopped, it is possible to maintain the angular position of the driven member H such as a hatchback without using an electromagnetic clutch or the like.

ここで、本発明の角度位置保持装置2では、軸状の内輪6とこれを囲繞する軸状の外輪8とが配置され、内輪6の外周面と外輪8の内周面との間には、断面が周状であって、内輪6と外輪8とを一体的に接続する接続部材50が配設されており、接続部材50には、内輪6の外周面及び外輪8の内周面の両方と密着して変形可能な突出部(角部54及び辺部56)が周方向に複数設けられている。そのため、内輪6の内側に入力側機器(駆動源M)の軸部Ma及び出力側機器(従動部材H)の軸部Haが共通して挿通されてこれらと内輪6とが一体的に連結された際、入力側機器(駆動源M)の軸部Maと出力側機器(従動部材H)の軸部Haとの間の芯ずれによって内輪6の中心軸が外輪8の中心軸に対して変位若しくは傾斜した場合であっても、接続部材50に設けられて変形可能な突出部(角部54及び辺部56)が変形することで、外輪8は、中心軸が変位若しくは傾斜することなく、内輪6と一体的に連結される。これにより、外輪8と、これの外周面に作用する制動トルク付与手段10との間の相対的な位置関係が変化することは抑制され、外輪8が回転した際に、制動トルク付与手段10(押圧片58の押圧面68)の特定部位が偏って外輪8の外周面に作用して制動トルク付与手段10の使用寿命が短縮してしまうことや、余計な振動や異音が発生してしまうことが防止される。 Here, in the angle position holding device 2 of the present invention, a shaft-shaped inner ring 6 and a shaft-shaped outer ring 8 surrounding the shaft-shaped inner ring 6 are arranged, and between the outer peripheral surface of the inner ring 6 and the inner peripheral surface of the outer ring 8. A connecting member 50 having a circumferential cross section and integrally connecting the inner ring 6 and the outer ring 8 is provided, and the connecting member 50 is formed on the outer peripheral surface of the inner ring 6 and the inner peripheral surface of the outer ring 8. A plurality of projecting portions (corner portions 54 and side portions 56) that are in close contact with both and can be deformed are provided in the circumferential direction. Therefore, the shaft portion Ma of the input side device (drive source M) and the shaft portion Ha of the output side device (driven member H) are commonly inserted inside the inner ring 6, and these and the inner ring 6 are integrally connected. At that time, the central axis of the inner ring 6 is displaced with respect to the central axis of the outer ring 8 due to the misalignment between the shaft portion Ma of the input side device (drive source M) and the shaft portion Ha of the output side device (driven member H). Alternatively, even when the outer ring 8 is tilted, the central axis of the outer ring 8 is not displaced or tilted due to the deformation of the deformable protrusions (corner portion 54 and side portion 56) provided on the connecting member 50. It is integrally connected to the inner ring 6. As a result, the relative positional relationship between the outer ring 8 and the braking torque applying means 10 acting on the outer peripheral surface of the outer ring 8 is suppressed from changing, and when the outer ring 8 rotates, the braking torque applying means 10 ( The specific portion of the pressing surface 68) of the pressing piece 58 is biased and acts on the outer peripheral surface of the outer ring 8, shortening the service life of the braking torque applying means 10, and causing unnecessary vibration and abnormal noise. Is prevented.

ここで、図示の実施形態においては、接続部材50の軸方向長さは内輪6の軸方向長さと実質上同一であった。しかしながら、上述したとおり、接続部材50は、内輪6の中心軸が外輪8の中心軸に対して変位若しくは傾斜した場合であっても、外輪8の中心軸を変位若しくは傾斜することなく内輪6と外輪8とを接続すればよく、従って、軸方向長さの短い接続部材を内輪6の軸方向両端部に夫々配置するようにして、内輪6と外輪8とを一体的に接続するようにしてもよい。さらに、接続部材に設けられた突出部(角部54及び辺部56)は、内輪6の外周面と外輪8の内周面の両方に密着する必要はなく、例えば、径方向内側又は外側のいずれか一方に向かって突出する突部を設け、かかる突部が内輪6の外周面又は外輪8の内周面のいずれか一方と密着するようにしてもよい。そして、かような突部は軸方向に間隔をおいて複数個配列されるようにしてもよい。 Here, in the illustrated embodiment, the axial length of the connecting member 50 is substantially the same as the axial length of the inner ring 6. However, as described above, the connecting member 50 does not displace or incline the central axis of the outer ring 8 even when the central axis of the inner ring 6 is displaced or inclined with respect to the central axis of the outer ring 8. The outer ring 8 may be connected, and therefore, connecting members having a short axial length may be arranged at both ends of the inner ring 6 in the axial direction so as to integrally connect the inner ring 6 and the outer ring 8. May be good. Further, the protruding portions (corner portions 54 and side portions 56) provided on the connecting member do not need to be in close contact with both the outer peripheral surface of the inner ring 6 and the inner peripheral surface of the outer ring 8, and are, for example, radially inside or outside. A protrusion that protrudes toward either one may be provided so that the protrusion is in close contact with either the outer peripheral surface of the inner ring 6 or the inner peripheral surface of the outer ring 8. Then, a plurality of such protrusions may be arranged at intervals in the axial direction.

また、図示の実施形態においては、制動トルク付与手段10は、コイルばね60によって径方向内側に付勢された押圧片58が外輪8の外周面を押圧することで、外輪8に制動トルクを付与していたが、これに限定されるものではない。制動トルク付与手段10は、例えば、ハウジングの内周面及び外輪の外周面に夫々摩擦板を固定し、ハウジング側に固定された摩擦板と外輪側に固定された摩擦板との摩擦によって外輪に制動トルクを付与するようにすることもできる。さらに、ハウジングの内周面と外輪の外周面との間に板ばねを配置し、かかる板ばねと外輪の外周面との間の摩擦によって外輪に制動トルクを付与するようにすることもできる。 Further, in the illustrated embodiment, the braking torque applying means 10 applies braking torque to the outer ring 8 by pressing the outer peripheral surface of the outer ring 8 with the pressing piece 58 urged inward in the radial direction by the coil spring 60. However, it is not limited to this. The braking torque applying means 10 fixes, for example, friction plates on the inner peripheral surface of the housing and the outer peripheral surface of the outer ring, respectively, and causes friction between the friction plate fixed on the housing side and the friction plate fixed on the outer ring side to the outer ring. It is also possible to apply braking torque. Further, a leaf spring may be arranged between the inner peripheral surface of the housing and the outer peripheral surface of the outer ring, and braking torque may be applied to the outer ring by friction between the leaf spring and the outer peripheral surface of the outer ring.

念のため付言しておくと、本発明の角度位置保持装置は、入力側機器としての電動モーターによって出力側機器であるハッチバックを開閉する開閉機構に限定して適用されるものでなく、種々の装置の機構部品として用いることが可能である。例えば、ヒンジにより回動可能に支持されるトイレの便座又は蓋の自動開閉機構や、プリンタの蓋等の自動開閉機構にも適用されうる。また、ヒンジにより支持される出力側機器ばかりではなく、内輪6に回転・直線運動の変換装置(例えば、歯車の回転をラックにより直線運動に変換する装置)を連結すると、直線運動を行うスライドドアのような機器の位置保持装置として使用することができる。 As a reminder, the angle position holding device of the present invention is not limited to the opening / closing mechanism for opening / closing the hatchback which is the output side device by the electric motor as the input side device, and is not applied to various types. It can be used as a mechanical component of the device. For example, it can be applied to an automatic opening / closing mechanism for a toilet seat or a lid rotatably supported by a hinge, and an automatic opening / closing mechanism for a printer lid or the like. Further, not only the output side device supported by the hinge, but also a sliding door that performs linear motion when a rotation / linear motion conversion device (for example, a device that converts the rotation of the gear into linear motion by a rack) is connected to the inner ring 6. It can be used as a position holding device for equipment such as.

以上、本発明の角度位置保持装置について添付した図面を参照して詳述したが、本発明は上述した実施形態に限定されるものではない。例えば、図示の実施形態においては、各構成部品を収容するハウジングとシールド板とはいわゆるスナップフィットによって結合されているが、ねじ等の締結具を用いて結合することもできる。また、図示の実施形態においては、内輪の内側の軸方向片端部に入力側機器の軸部を、軸方向他端部に出力側機器の軸部が夫々挿通されていたが、これら軸部は逆に挿通されていてもよい。 Although the angle position holding device of the present invention has been described in detail with reference to the attached drawings, the present invention is not limited to the above-described embodiment. For example, in the illustrated embodiment, the housing accommodating each component and the shield plate are connected by a so-called snap fit, but they can also be connected by using a fastener such as a screw. Further, in the illustrated embodiment, the shaft portion of the input side device is inserted into one end in the axial direction inside the inner ring, and the shaft portion of the output side device is inserted into the other end in the axial direction. On the contrary, it may be inserted.

2:角度位置保持装置
4:ハウジング
6:内輪
8:外輪
10:制動トルク付与手段
50:接続部材
54:角部(突出部)
56:辺部(突出部)
2: Angle position holding device 4: Housing 6: Inner ring 8: Outer ring 10: Braking torque applying means 50: Connecting member 54: Corner (protruding part)
56: Side (protruding part)

Claims (6)

入力側機器から回転トルクが入力されないときは、制動トルクを付与して出力側機器の角度位置を保持する角度位置保持装置であって、
固定のハウジングを具備し、
前記ハウジングの内側には、軸状の内輪と、前記内輪の外周面を囲繞する軸状の外輪と、前記外輪の外周面との摩擦によって前記外輪に対して所定の制動トルクを付与する制動トルク付与手段とが設けられており、
前記内輪の内側には、入力側機器の軸部及び出力側機器の軸部が共通して挿通され、前記内輪は入力側機器の軸部及び出力側機器の軸部と一体となって回転可能であり、
前記内輪の外周面と前記外輪の内周面との間には、断面が周状乃至環状であって、前記内輪と前記外輪とを一体的に接続する接続部材が配設され、前記接続部材には、前記内輪の外周面及び前記外輪の内周面のいずれか一方又はその両方と密着して変形可能な突出部が周方向に複数設けられている、ことを特徴とする角度位置保持装置。
An angular position holding device that applies braking torque to hold the angular position of the output side device when rotational torque is not input from the input side device.
Equipped with a fixed housing,
Inside the housing, a braking torque that applies a predetermined braking torque to the outer ring by friction between the shaft-shaped inner ring, the shaft-shaped outer ring surrounding the outer peripheral surface of the inner ring, and the outer peripheral surface of the outer ring. There is a means of granting,
The shaft portion of the input side device and the shaft portion of the output side device are commonly inserted inside the inner ring, and the inner ring can rotate integrally with the shaft portion of the input side device and the shaft portion of the output side device. And
A connecting member having a circumferential to annular cross section and integrally connecting the inner ring and the outer ring is disposed between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring. Is provided with a plurality of projecting portions in the circumferential direction that can be deformed in close contact with either one or both of the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring. ..
前記接続部材は前記内輪の軸方向長さと同一である、請求項1に記載の角度位置保持装置。 The angle position holding device according to claim 1, wherein the connecting member has the same axial length as the inner ring. 前記突出部は前記接続部材の軸方向にも延在する、請求項1又は2に記載の角度位置保持装置。 The angle position holding device according to claim 1 or 2, wherein the protruding portion extends in the axial direction of the connecting member. 前記制動トルク付与手段は、コイルばねによって径方向内側に付勢されて前記外輪の外周面を押圧する押圧片を備えている、請求項1乃至3のいずれかに記載の角度位置保持装置。 The angle position holding device according to any one of claims 1 to 3, wherein the braking torque applying means includes a pressing piece that is urged inward in the radial direction by a coil spring to press the outer peripheral surface of the outer ring. 前記押圧片は軸方向及び周方向のいずれか一方又はその両方に間隔をおいて複数設けられている、請求項4に記載の角度位置保持装置。 The angle position holding device according to claim 4, wherein a plurality of the pressing pieces are provided at intervals in either one of the axial direction and the circumferential direction, or both of them. 前記押圧片の径方向内側端面には、縦断面が径方向内側に向かって凸弧状の押圧面が形成されていると共に、前記外輪の外周面には、前記押圧面と対応する凹弧状の被押圧溝が環状に形成されている、請求項4又は5に記載の角度位置保持装置。 The radial inner end surface of the pressing piece is formed with a pressing surface having a convex arc shape with a vertical cross section inward in the radial direction, and the outer peripheral surface of the outer ring is covered with a concave arc shape corresponding to the pressing surface. The angle position holding device according to claim 4 or 5, wherein the pressing groove is formed in an annular shape.
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