JP5335341B2

JP5335341B2 - motor

Info

Publication number: JP5335341B2
Application number: JP2008236736A
Authority: JP
Inventors: 律郎平松
Original assignee: Asmo Co Ltd
Current assignee: Asmo Co Ltd
Priority date: 2008-09-16
Filing date: 2008-09-16
Publication date: 2013-11-06
Anticipated expiration: 2028-09-16
Also published as: JP2010074890A

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor which is high in the accuracy of concentricity between a rotating shaft and a connecting shaft while facilitating the molding of a resin-made housing, and furthermore, can reduce the generation of noise and the degradation of efficiency caused by axial displacement between the rotating shaft and the connecting shaft. <P>SOLUTION: The motor includes a motor body 2 which is substantially accommodated in a substantially-bottomed yoke 4, and rotationally drives the rotating shaft 6 whose own base end side is rotatably supported by a bearing fixed to the bottom of the yoke 4, and a speed reduction part 3 having a worm shaft 14 which is accommodated in a resin-made gear housing 21 assembled into the opening end of the yoke 4, and whose own base end is connected to the tip of the rotating shaft 6 which is rotatably supported on the same axis as that of the rotating shaft 6 via a clutch 30. The bearing 15 rotatably supporting the base end side of the worm shaft 14 is fixed to a connecting shaft base-end bearing fixing part 12f of a metal-made bearing holding member 12 having an engagement part (end engagement part 12c and internal periphery engagement part 12d) which is directly engaged with the yoke 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、例えば、モータ本体の回転軸に、樹脂製のギヤハウジング内に収容されたウォーム軸が連結されたモータに関するものである。 The present invention relates to a motor in which, for example, a rotating shaft of a motor body is connected to a worm shaft housed in a resin gear housing.

従来、モータとしては、略有底筒状のヨーク内に収容された回転軸を回転駆動するモータ本体と、ヨークの開口端に組み付けられるギヤハウジング内に収容されるとともに前記回転軸の先端部と自身の基端部がクラッチを介して連結されるウォーム軸（連結軸）を有した減速部とを備えたものがある（例えば、特許文献１参照）。このようなモータにおける回転軸の基端部は、ヨークの底部に固定された軸受にて回転可能に支持される。又、回転軸の先端部は、ヨークに組み付けられる樹脂製のブラシホルダに固定された軸受、又はギヤハウジングに固定されたクラッチ（そのカラー）に固定された軸受にて回転可能に支持される。又、ウォーム軸は、その基端部及び先端部がギヤハウジングに固定された軸受にて回転可能に支持される。
国際公開（ＷＯ）００／０８３４９号公報 Conventionally, as a motor, a motor body that rotationally drives a rotating shaft housed in a substantially bottomed cylindrical yoke, a housing housed in a gear housing assembled to the opening end of the yoke, and a tip portion of the rotating shaft Some have a reduction portion having a worm shaft (connection shaft) whose base end portion is connected via a clutch (see, for example, Patent Document 1). The base end portion of the rotating shaft in such a motor is rotatably supported by a bearing fixed to the bottom of the yoke. The tip of the rotating shaft is rotatably supported by a bearing fixed to a resin brush holder assembled to the yoke or a bearing fixed to a clutch (its collar) fixed to the gear housing. The worm shaft is rotatably supported by a bearing whose base end and tip end are fixed to the gear housing.
International Publication (WO) 00/08349

しかしながら、上記のようなモータでは、ギヤハウジングを樹脂製とした場合、その成形寸法精度が低いと、少なくとも回転軸の基端部を支持する軸受とウォーム軸の基端部を支持する軸受との同軸度が低くなり、ひいては回転軸と連結軸の同軸度が低くなる（軸ずれが生じる）という問題がある。尚、回転軸と連結軸の軸ずれは、異音の発生や効率低下を招く原因となる。又、同軸度を高精度とすべく樹脂製のギヤハウジングの成形寸法精度を高くしようとすると、例えば樹脂成形型が高価となるなど高コスト化してしまうことになる。 However, in the motor as described above, when the gear housing is made of resin and the molding dimensional accuracy is low, at least the bearing that supports the base end of the rotating shaft and the bearing that supports the base end of the worm shaft There is a problem that the degree of coaxiality is lowered, and consequently the degree of coaxiality between the rotating shaft and the connecting shaft is lowered (axial deviation occurs). In addition, the shaft misalignment between the rotating shaft and the connecting shaft may cause noise and decrease efficiency. Further, if it is attempted to increase the molding dimensional accuracy of the resin gear housing so as to make the coaxiality highly accurate, for example, the cost of the resin molding die becomes high.

本発明は、上記問題点を解決するためになされたものであって、その目的は、樹脂製のハウジングの成形を容易としながら、回転軸と連結軸の同軸度を高精度とし、ひいては回転軸と連結軸の軸ずれに基づく異音発生や効率低下を低減することができるモータを提供することにある。 The present invention has been made in order to solve the above-described problems. The object of the present invention is to make it easy to mold a resin housing, while making the coaxiality of the rotating shaft and the connecting shaft highly accurate, and thus the rotating shaft. Another object of the present invention is to provide a motor capable of reducing the occurrence of abnormal noise and the reduction in efficiency due to the displacement of the connecting shaft.

請求項１に記載の発明では、略有底筒状のヨーク内に略収容されるとともに該ヨークの底部に固定された軸受にて自身の基端側が回転可能に支持された回転軸を回転駆動するモータ本体と、前記ヨークの開口端に組み付けられる樹脂製のハウジング内に略収容されるとともに前記回転軸と同軸上で回転可能に支持され該回転軸の先端部と自身の基端部が連結部材を介して連結される連結軸を有した連結駆動部とを備えたモータであって、前記連結軸の基端側を回転可能に支持する軸受は、前記ヨークと直接係合する係合部を有した金属製の軸受保持部材の連結軸基端軸受固定部に固定され、該連結軸基端軸受固定部は、前記ハウジング内に収容されており、単一部材の前記軸受保持部材は、前記連結軸基端軸受固定部と、前記回転軸の先端側を回転可能に支持する軸受が固定される回転軸軸受固定部とを含んで構成された。 According to the first aspect of the present invention, a rotary shaft that is substantially housed in a substantially bottomed cylindrical yoke and is rotatably supported by a bearing fixed to the bottom of the yoke is rotatably driven. The motor main body and a housing made of resin that is assembled to the opening end of the yoke and are supported so as to be rotatable coaxially with the rotating shaft, and the distal end portion of the rotating shaft and the base end portion of the rotating shaft are connected. A motor including a connection drive unit having a connection shaft connected via a member, wherein the bearing that rotatably supports the base end side of the connection shaft is an engagement unit that directly engages with the yoke Fixed to the connecting shaft base end bearing fixing portion of the metal bearing holding member with the connecting shaft base end bearing fixing portion being housed in the housing, and the bearing holding member of a single member, The connecting shaft base end bearing fixing portion and the front end side of the rotating shaft Bearing that rotatably supports is configured to include a rotation shaft bearing fixing portion fixed.

同構成によれば、ヨークと直接係合する係合部を有した金属製の軸受保持部材の連結軸基端軸受固定部にハウジング内で連結軸の基端側を支持する軸受が固定されるため、樹脂製のハウジングの成形寸法精度に関わらず、ヨークの底部で回転軸の基端側を支持する軸受とハウジング内で連結軸を支持する軸受との同軸度を高精度とすることができる。よって、樹脂製のハウジングの成形を容易としながら、回転軸と連結軸の同軸度を高精度とすることができ、それらの軸ずれに基づく異音発生や効率低下を低減することができる。 According to this configuration, the bearing that supports the base end side of the connecting shaft in the housing is fixed to the connecting shaft base end bearing fixing portion of the metal bearing holding member having the engaging portion that directly engages with the yoke. Therefore, the coaxiality between the bearing that supports the base end side of the rotating shaft at the bottom of the yoke and the bearing that supports the connecting shaft in the housing can be made highly accurate regardless of the molding dimensional accuracy of the resin housing. . Therefore, the coaxiality of the rotating shaft and the connecting shaft can be made highly accurate while facilitating the molding of the resin housing, and it is possible to reduce the occurrence of abnormal noise and the reduction in efficiency due to the shaft misalignment.

また、ヨークと直接係合する係合部を有した金属製の軸受保持部材の回転軸軸受固定部に回転軸の先端側を回転可能に支持する軸受が固定されるため、例えば、該軸受をヨークに組み付けられる樹脂製のブラシホルダに固定する場合に比べて、回転軸の先端側を支持する軸受についても前記両軸受との同軸度を高精度とすることができる。よって、例えば、樹脂製のブラシホルダの成形寸法精度に関わらず、即ちその成形を容易としながら、回転軸と連結軸の同軸度をより高精度とすることができ、それらの軸ずれに基づく異音発生や効率低下をより低減することができる。
請求項２に記載の発明では、請求項１に記載のモータにおいて、前記モータ本体は、樹脂製のブラシホルダ本体を有するものであって、該ブラシホルダ本体は前記軸受保持部材に一体成形された。 Further, since the bearing that rotatably supports the tip end side of the rotating shaft is fixed to the rotating shaft bearing fixing portion of the metal bearing holding member having the engaging portion that directly engages with the yoke, for example, the bearing is Compared with the case of fixing to a resin brush holder assembled to the yoke, the degree of coaxiality between the bearings supporting the tip end of the rotating shaft can be made high. Therefore, for example, regardless of the molding dimensional accuracy of the resin brush holder, that is, while facilitating the molding, it is possible to make the coaxiality of the rotating shaft and the connecting shaft more accurate, and the difference based on the misalignment between them. Sound generation and efficiency reduction can be further reduced.
According to a second aspect of the present invention, in the motor according to the first aspect, the motor main body has a resin brush holder main body, and the brush holder main body is integrally formed with the bearing holding member. .

同構成によれば、ブラシホルダ本体と軸受保持部材とが一体成形されるため、組み付けが容易となる。さらに、樹脂製のブラシホルダ本体によりヨークと直接係合する軸受保持部材の振動（金属同士の係合による振動の増幅）が抑制される。 According to this configuration, since the brush holder main body and the bearing holding member are integrally formed, assembly is facilitated. Furthermore, the vibration of the bearing holding member that directly engages with the yoke by the resin brush holder body (amplification of vibration due to the engagement of metals) is suppressed.

請求項３に記載の発明では、請求項１又は２に記載のモータにおいて、前記連結部材は、円形の内周面で転動体を挟持するか否かによって、前記回転軸からの回転力を前記連結軸に伝達し、前記連結軸からの回転力を前記回転軸に伝達しないクラッチであって、前記軸受保持部材は、前記内周面を有する筒状のクラッチカラー部を備えた。 According to a third aspect of the present invention, in the motor according to the first or second aspect, the connecting member generates a rotational force from the rotating shaft depending on whether or not the rolling element is sandwiched between circular inner peripheral surfaces. A clutch that transmits to a connecting shaft and does not transmit a rotational force from the connecting shaft to the rotating shaft, wherein the bearing holding member includes a cylindrical clutch collar portion having the inner peripheral surface.

同構成によれば、回転軸の先端部と連結軸の基端部は、円形の内周面で転動体を挟持するか否かによって、回転軸からの回転力を連結軸に伝達し、連結軸からの回転力を回転軸に伝達しないクラッチを介して連結される。そして、一般的にこのようなクラッチの円形の内周面を有するカラー部材はハウジングに固定されるが、同構成によれば、円形の内周面を有するクラッチカラー部は、ヨークと直接係合する係合部を有した金属製の軸受保持部材に備えられるため、樹脂製のハウジングの成形寸法精度に関わらず、クラッチと前記両軸受との同軸度を高精度とすることができる。よって、樹脂製のハウジングの成形を容易としながら、回転軸と連結軸とクラッチの同軸度を高精度とすることができ、それらの軸ずれに基づく異音発生や効率低下やクラッチの動作不良を低減することができる。 According to this configuration, the distal end portion of the rotating shaft and the base end portion of the connecting shaft transmit the rotational force from the rotating shaft to the connecting shaft depending on whether or not the rolling element is sandwiched between the circular inner peripheral surfaces, It is connected via a clutch that does not transmit the rotational force from the shaft to the rotating shaft. In general, a collar member having a circular inner peripheral surface of such a clutch is fixed to the housing, but according to the configuration, the clutch collar portion having a circular inner peripheral surface is directly engaged with the yoke. Since the metal bearing holding member having the engaging portion is provided, the coaxiality between the clutch and the both bearings can be made high accuracy irrespective of the molding dimensional accuracy of the resin housing. Therefore, while making it easy to mold the resin housing, the coaxiality of the rotating shaft, the connecting shaft, and the clutch can be made highly accurate. Can be reduced.

請求項４に記載の発明では、請求項１乃至３のいずれか１項に記載のモータにおいて、前記軸受保持部材は、前記連結軸の先端側を回転可能に支持する軸受が固定される連結軸先端軸受固定部を備えた。 According to a fourth aspect of the present invention, in the motor according to any one of the first to third aspects, the bearing holding member is a coupling shaft to which a bearing that rotatably supports the distal end side of the coupling shaft is fixed. A tip bearing fixing portion was provided.

同構成によれば、ヨークと直接係合する係合部を有した金属製の軸受保持部材の連結軸先端軸受固定部に連結軸の先端側を回転可能に支持する軸受が固定されるため、その軸受についても他の軸受との同軸度を高精度とすることができる。よって、樹脂製のハウジングの成形寸法精度に関わらず、即ちその成形を容易としながら、回転軸と連結軸の同軸度をより高精度とすることができ、それらの軸ずれに基づく異音発生や効率低下をより低減することができる。 According to this configuration, the bearing that rotatably supports the distal end side of the connecting shaft is fixed to the connecting shaft tip bearing fixing portion of the metal bearing holding member having the engaging portion that directly engages with the yoke. The degree of coaxiality with other bearings can also be made highly accurate. Therefore, regardless of the molding dimensional accuracy of the resin housing, that is, while facilitating the molding, it is possible to make the coaxiality of the rotating shaft and the connecting shaft more accurate, and the generation of abnormal noise based on the misalignment of those shafts The reduction in efficiency can be further reduced.

請求項５に記載の発明では、請求項１乃至４のいずれか１項に記載のモータにおいて、前記係合部は、前記ヨークの内周面と直接係合する内周係合部と、前記ヨークの開口方向端部と直接係合する端部係合部とを備えた。 According to a fifth aspect of the present invention, in the motor according to any one of the first to fourth aspects, the engaging portion includes an inner peripheral engaging portion that directly engages with an inner peripheral surface of the yoke, An end engaging portion that directly engages with the opening direction end of the yoke was provided.

同構成によれば、係合部の内周係合部がヨークの内周面と直接係合することで軸受保持部材、ひいてはそれに固定される軸受の軸直交方向位置の位置決めが高精度となり、更に係合部の端部係合部がヨークの開口方向端部と直接係合することで軸受保持部材、ひいて
はそれに固定される軸受の軸線方向位置の位置決めが高精度となる。 According to the same configuration, the inner peripheral engaging portion of the engaging portion directly engages with the inner peripheral surface of the yoke, so that the positioning of the bearing holding member, and thus the shaft orthogonal direction position of the bearing fixed thereto, becomes highly accurate. Furthermore, since the end engaging portion of the engaging portion directly engages with the end portion of the yoke in the opening direction, the positioning of the bearing holding member, and thus the axial position of the bearing fixed thereto, becomes highly accurate.

本発明によれば、樹脂製のハウジングの成形を容易としながら、回転軸と連結軸の同軸度を高精度とし、ひいては回転軸と連結軸の軸ずれに基づく異音発生や効率低下を低減することができるモータを提供することができる。 According to the present invention, while facilitating the molding of a resin housing, the coaxiality of the rotating shaft and the connecting shaft is made highly accurate, and consequently, the generation of abnormal noise and the reduction in efficiency due to the axial deviation between the rotating shaft and the connecting shaft are reduced. The motor which can be provided can be provided.

以下、本発明を具体化した一実施の形態を図１〜図６に従って説明する。図１は、車両パワーウインドウ装置用のモータ１の断面図を示す。モータ１は、モータ本体２、及び連結駆動部としての減速部３を備えている。 Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. FIG. 1 shows a cross-sectional view of a motor 1 for a vehicle power window device. The motor 1 includes a motor body 2 and a speed reduction unit 3 as a connection drive unit.

前記モータ本体２は、ヨーク４、１対のマグネット５、回転軸６を有するアーマチャ（電機子）７、整流子８、ブラシホルダ部材９及び給電ブラシＢを備えている。
ヨーク４は略有底扁平円筒状に形成されており、該ヨーク４の内周面には１対のマグネット５が対向するように固着されている。マグネット５の内側には、アーマチャ７が収容されている。アーマチャ７における回転軸６の基端側はヨーク４の底部中央に固定された軸受１０にて回転可能に支持されている。又、回転軸６の先端側の所定部位には、整流子８が固定されている。又、回転軸６の先端部には、図２に示すように、２面幅形状の連結部６ａが形成されている。 The motor body 2 includes a yoke 4, a pair of magnets 5, an armature (armature) 7 having a rotating shaft 6, a commutator 8, a brush holder member 9, and a power supply brush B.
The yoke 4 is formed in a substantially bottomed flat cylindrical shape, and a pair of magnets 5 are fixed to the inner peripheral surface of the yoke 4 so as to face each other. An armature 7 is accommodated inside the magnet 5. The base end side of the rotating shaft 6 in the armature 7 is rotatably supported by a bearing 10 fixed at the bottom center of the yoke 4. A commutator 8 is fixed to a predetermined portion on the tip side of the rotating shaft 6. Further, as shown in FIG. 2, a connecting portion 6a having a two-surface width shape is formed at the tip of the rotating shaft 6.

ヨーク４の開口部には、ブラシホルダ部材９が組み付けられる。このブラシホルダ部材９は、樹脂製のブラシホルダ本体１１と該ブラシホルダ本体１１に一体成形（アウトサート成形）された金属製の軸受保持部材１２とを備える。ブラシホルダ本体１１は、ヨーク４の開口部を略覆う形状のホルダ本体部１１ａ（図３参照）と、該ホルダ本体部１１ａから一体に設けられヨーク４の径方向外側（図１中、左側）に突出するコネクタ部１１ｂとを備える。 A brush holder member 9 is assembled in the opening of the yoke 4. The brush holder member 9 includes a resin brush holder main body 11 and a metal bearing holding member 12 formed integrally with the brush holder main body 11 (outsert molding). The brush holder body 11 includes a holder body 11a (see FIG. 3) having a shape that substantially covers the opening of the yoke 4, and a radially outer side of the yoke 4 that is integrally provided from the holder body 11a (left side in FIG. 1). The connector part 11b which protrudes in this is provided.

ホルダ本体部１１ａのヨーク４側には、コネクタ部１１ｂと図示しない配線で接続され、前記整流子８と摺接する一対の給電ブラシＢがブラシ保持部１１ｃによりそれぞれ保持されている。給電ブラシＢは、コネクタ部１１ｂを介して供給される外部電源を、整流子８を介してアーマチャ７における電機子コアに巻装されたコイル巻線に供給し、アーマチャ７（回転軸６）を回転駆動させる。 A pair of power supply brushes B that are connected to the connector portion 11b by a wiring (not shown) and are in sliding contact with the commutator 8 are respectively held by the brush holding portion 11c on the yoke 4 side of the holder main body portion 11a. The power supply brush B supplies an external power source supplied through the connector portion 11b to the coil winding wound around the armature core in the armature 7 through the commutator 8, and the armature 7 (rotary shaft 6) is supplied. Drive to rotate.

軸受保持部材１２は、図２及び図３に示すように、ヨーク４の開口部に対応した略小判形状の板状部１２ａと、該板状部１２ａの中央から筒状に延びて軸方向に貫通する筒状部１２ｂとを備える。 As shown in FIGS. 2 and 3, the bearing holding member 12 includes a substantially oval plate-like portion 12a corresponding to the opening of the yoke 4, and a cylindrical shape extending from the center of the plate-like portion 12a in the axial direction. A cylindrical portion 12b penetrating therethrough.

板状部１２ａは、その大部分が前記ホルダ本体部１１ａに埋設されて設けられる。そして、板状部１２ａにおいてヨーク４の扁平面４ａ（図３参照）に沿った方向（図１〜３中、左右方向）の両端部には、（径方向）外側に延びるとともにホルダ本体部１１ａから露出しヨーク４の開口方向端部のフランジ部４ｂと直接係合（当接）する端部係合部１２ｃが形成されている。又、板状部１２ａにおいてヨーク４の扁平面４ａ（図３参照）に沿った方向（図１〜３中、左右方向）の両端部には、軸方向（図２中、上方向であって、図３中、紙面手前方向）に延びるとともにホルダ本体部１１ａから露出しヨーク４の内周面４ｃと直接係合（当接）する内周係合部１２ｄが形成されている。尚、本実施の形態における前記端部係合部１２ｃは、図３に示すように、前記扁平面４ａの直交方向（図３中、上下方向）中央に形成されている。又、本実施の形態における前記内周係合部１２ｄは、前記扁平面４ａの直交方向（図３中、上下方向）両側に一対（即ちヨーク４の略四隅に対応して全部で４つ）形成されている。又、本実施の形態では、端部係合部１２ｃ及び内周係合部１２ｄが係合部を構成している。 Most of the plate-like portion 12a is embedded in the holder main body portion 11a. And in the plate-shaped part 12a, the both ends of the direction along the flat surface 4a (refer FIG. 3) of the yoke 4 (left-right direction in FIGS. 1-3) extend outside (radial direction), and the holder main-body part 11a. An end engaging portion 12c is formed which is exposed from and is directly engaged (contacted) with the flange portion 4b at the end of the yoke 4 in the opening direction. Further, in the plate-like portion 12a, both ends of the yoke 4 in the direction (left and right direction in FIGS. 1 to 3) along the flat surface 4a (see FIG. 3) are axial directions (upward in FIG. 2). 3, an inner peripheral engagement portion 12d is formed that extends in the front side of the paper surface and is exposed from the holder main body portion 11a and directly engages (contacts) with the inner peripheral surface 4c of the yoke 4. In addition, as shown in FIG. 3, the end engaging portion 12c in the present embodiment is formed at the center in the orthogonal direction (vertical direction in FIG. 3) of the flat surface 4a. Further, in the present embodiment, the inner peripheral engagement portions 12d are paired on both sides in the orthogonal direction (vertical direction in FIG. 3) of the flat surface 4a (that is, a total of four corresponding to the substantially four corners of the yoke 4). Is formed. In the present embodiment, the end engaging portion 12c and the inner peripheral engaging portion 12d constitute an engaging portion.

筒状部１２ｂは、図２に示すように、その（基端部を除いた）大部分が前記ホルダ本体部１１ａから露出するように設けられている。そして、筒状部１２ｂの基端側は、回転軸６の先端側を回転可能に支持する軸受１３が固定される回転軸軸受固定部１２ｅとされている。又、筒状部１２ｂの先端部は、後述する連結軸としてのウォーム軸１４の基端側を回転可能に支持する軸受１５が固定される連結軸基端軸受固定部１２ｆとされている。更に、筒状部１２ｂの中間部（回転軸軸受固定部１２ｅと連結軸基端軸受固定部１２ｆの間）は、後述する連結部材としてのクラッチ３０におけるクラッチカラー部３１とされている。尚、本実施の形態の回転軸軸受固定部１２ｅ及び連結軸基端軸受固定部１２ｆは、その内周面に前記軸受１３，１５の外周が圧入固定される形状（筒状）であって、回転軸軸受固定部１２ｅ、連結軸基端軸受固定部１２ｆ及びクラッチカラー部３１は同径に、即ち筒状部１２ｂの径は一定に形成されている。 As shown in FIG. 2, the cylindrical portion 12b is provided so that most of the cylindrical portion 12b (excluding the base end portion) is exposed from the holder main body portion 11a. And the base end side of the cylindrical part 12b is made into the rotating shaft bearing fixing | fixed part 12e to which the bearing 13 which rotatably supports the front end side of the rotating shaft 6 is fixed. Further, the distal end portion of the cylindrical portion 12b is a connecting shaft base end bearing fixing portion 12f to which a bearing 15 that rotatably supports a base end side of a worm shaft 14 as a connecting shaft described later is fixed. Further, an intermediate portion of the cylindrical portion 12b (between the rotary shaft bearing fixing portion 12e and the connecting shaft base end bearing fixing portion 12f) is a clutch collar portion 31 in a clutch 30 as a connecting member described later. The rotary shaft bearing fixing portion 12e and the connecting shaft base end bearing fixing portion 12f of the present embodiment have a shape (cylindrical shape) in which the outer circumferences of the bearings 13 and 15 are press-fitted and fixed to the inner circumferential surface thereof. The rotary shaft bearing fixing portion 12e, the connecting shaft base end bearing fixing portion 12f, and the clutch collar portion 31 are formed to have the same diameter, that is, the diameter of the cylindrical portion 12b is constant.

前記減速部３は、ハウジングとしてのギヤハウジング２１、前記ウォーム軸１４、ウォームホイール２２及び出力軸２３を備えている。
ギヤハウジング２１は樹脂製であって、図１に示すように、前記ブラシホルダ部材９（前記端部係合部１２ｃを含む部分）を挟持しながらヨーク４の開口端（フランジ部４ｂ）に固定される固定部２１ａを有する。 The speed reduction unit 3 includes a gear housing 21 as a housing, the worm shaft 14, a worm wheel 22, and an output shaft 23.
The gear housing 21 is made of resin and, as shown in FIG. 1, is fixed to the open end (flange portion 4b) of the yoke 4 while holding the brush holder member 9 (the portion including the end engaging portion 12c). The fixing portion 21a is provided.

又、ギヤハウジング２１の固定部２１ａの中央であって前記回転軸６の軸中心と対応した位置には、前記軸受保持部材１２の筒状部１２ｂを収容可能な収容凹部２１ｂ（図２参照）が形成され、更に収容凹部２１ｂの底部中央には前記ウォーム軸１４を収容可能なウォーム軸収容部２１ｃが形成されている。そして、前記収容凹部２１ｂには前記軸受保持部材１２の筒状部１２ｂが遊嵌され、ウォーム軸収容部２１ｃには前記筒状部１２ｂから突出したウォーム軸１４が収容されている。このウォーム軸１４は、前記回転軸６と同軸上において、その基端側が前記連結軸基端軸受固定部１２ｆ（図２参照）に固定された軸受１５に回転可能に支持され、その先端側がウォーム軸収容部２１ｃの底部に固定された軸受２４（図１参照）にて回転可能に支持されている。 An accommodation recess 21b (see FIG. 2) that can accommodate the cylindrical portion 12b of the bearing holding member 12 is located at the center of the fixed portion 21a of the gear housing 21 and corresponding to the axis center of the rotating shaft 6. Further, a worm shaft housing portion 21c capable of housing the worm shaft 14 is formed at the center of the bottom of the housing recess 21b. And the cylindrical part 12b of the said bearing holding member 12 is loosely fitted by the said accommodation recessed part 21b, and the worm shaft 14 which protruded from the said cylindrical part 12b is accommodated in the worm shaft accommodating part 21c. The worm shaft 14 is rotatably supported by a bearing 15 whose base end side is fixed to the connecting shaft base end bearing fixing portion 12f (see FIG. 2) on the same axis as the rotary shaft 6, and the tip end side thereof is the worm shaft. It is rotatably supported by a bearing 24 (see FIG. 1) fixed to the bottom of the shaft accommodating portion 21c.

又、ギヤハウジング２１のウォーム軸収容部２１ｃの中間部の軸線直交方向（図１中、右方向）には、該ウォーム軸収容部２１ｃと連通するホイール収容部２１ｄが形成されている。そして、前記ホイール収容部２１ｄには、前記ウォームホイール２２がウォーム軸１４のウォーム１４ａと噛合するように、ウォーム軸１４と直交する方向（図１の紙面直交方向）の軸中心で回転可能に収容されている。そして、前記出力軸２３は、ウォームホイール２２の回転に伴って同軸で回転するように該ウォームホイール２２に連結されている。この出力軸２３は、公知の図示しないレギュレータを介して図示しないウインドガラスに連結されることになる。 Further, a wheel housing portion 21d communicating with the worm shaft housing portion 21c is formed in the direction orthogonal to the axis of the intermediate portion of the worm shaft housing portion 21c of the gear housing 21 (right direction in FIG. 1). The wheel housing portion 21d accommodates the worm wheel 22 so as to be rotatable about the axis in the direction perpendicular to the worm shaft 14 (the direction perpendicular to the plane of FIG. 1) so that the worm wheel 22 meshes with the worm 14a of the worm shaft 14. Has been. The output shaft 23 is coupled to the worm wheel 22 so as to rotate coaxially with the rotation of the worm wheel 22. The output shaft 23 is connected to a window glass (not shown) via a known regulator (not shown).

又、前記回転軸６と前記ウォーム軸１４とを連結する前記クラッチ３０は、前記クラッチカラー部３１の円形の内周面３１ａで転動体３２（図２及び図４参照）を挟持するか否かによって、回転軸６からの回転力をウォーム軸１４に伝達し、ウォーム軸１４からの回転力を回転軸６に伝達しない（それらの回転を阻止する）ように構成されている。即ち、クラッチ３０は、モータ本体２の駆動に基づいた回転軸６の回転力をウォーム軸１４に伝達する一方、負荷側（ウインドレギュレータ）から出力軸２３及びウォームホイール２２を介してウォーム軸１４に回転力が作用した場合に、その回転力を回転軸６に伝達しないようにウォーム軸１４の回転を阻止するものである。 Whether or not the clutch 30 that connects the rotating shaft 6 and the worm shaft 14 holds the rolling element 32 (see FIGS. 2 and 4) between the circular inner peripheral surface 31 a of the clutch collar portion 31. Thus, the rotational force from the rotating shaft 6 is transmitted to the worm shaft 14, and the rotating force from the worm shaft 14 is not transmitted to the rotating shaft 6 (they are prevented from rotating). That is, the clutch 30 transmits the rotational force of the rotating shaft 6 based on the drive of the motor body 2 to the worm shaft 14, while the load side (window regulator) passes through the output shaft 23 and the worm wheel 22 to the worm shaft 14. When the rotational force is applied, the rotation of the worm shaft 14 is prevented so that the rotational force is not transmitted to the rotational shaft 6.

詳しくは、このようなクラッチ３０は、図２及び図４に示すように、前記クラッチカラー部３１内に配置される前記ウォーム軸１４の基端部に形成された従動側回転体２９と、３つの転動体３２と、サポート部材３３と、前記回転軸６の連結部６ａに嵌着された駆動側回転体３４と、ボール３５とを備えている。 Specifically, as shown in FIGS. 2 and 4, the clutch 30 includes a driven side rotating body 29 formed at the base end portion of the worm shaft 14 disposed in the clutch collar portion 31, and 3 Two rolling elements 32, a support member 33, a driving side rotating body 34 fitted to the connecting portion 6 a of the rotating shaft 6, and a ball 35 are provided.

前記従動側回転体２９は、図２に示すように、ウォーム軸１４の基端部において拡径された円盤部２９ａと、円盤部２９ａの軸中心からモータ本体２側（回転軸６側）に延びる軸部２９ｂと、軸部２９ｂから等角度（１２０°）間隔で径方向外側に延びる３つの係合凸部２９ｃ（図４参照）とからなる。係合凸部２９ｃは、図４に示すように、径方向外側に向かうほど周方向の幅が広がるように形成されている。又、係合凸部２９ｃの径方向外側面は、クラッチカラー部３１の内周面３１ａとの距離が回転方向に変化するように略平面の制御面４１とされている。軸部２９ｂのモータ本体２側（回転軸６側）の軸中心部には、図２に示すように、円形の凹部２９ｄが凹設されている。 As shown in FIG. 2, the driven-side rotator 29 has a disk portion 29a whose diameter is enlarged at the proximal end portion of the worm shaft 14, and the motor body 2 side (rotary shaft 6 side) from the axis center of the disk portion 29a. The shaft portion 29b extends, and three engaging convex portions 29c (see FIG. 4) that extend radially outward from the shaft portion 29b at an equal angle (120 °) interval. As shown in FIG. 4, the engagement convex portion 29 c is formed so that the width in the circumferential direction increases toward the outer side in the radial direction. Further, the radially outer surface of the engaging convex portion 29c is a substantially flat control surface 41 so that the distance from the inner peripheral surface 31a of the clutch collar portion 31 changes in the rotational direction. As shown in FIG. 2, a circular concave portion 29d is formed in the shaft center portion of the shaft portion 29b on the motor body 2 side (rotary shaft 6 side).

各転動体３２は、金属材料にて略円柱形状に形成され、図４に示すように、係合凸部２９ｃの制御面４１とクラッチカラー部３１の内周面３１ａとの間に配置されている。転動体３２の直径は、制御面４１の中央部（回転方向中央部）４１ａと前記内周面３１ａの間隔の長さより小さく、制御面４１の側部（回転方向端部）４１ｂ，４１ｃと前記内周面３１ａの間隔の長さより大きく設定されている。即ち、転動体３２の直径は、中央部４１ａと側部４１ｂ，４１ｃとの間の中間部４１ｄと、前記内周面３１ａの間隔の長さと等しく設定されている。 Each rolling element 32 is formed in a substantially cylindrical shape with a metal material, and is disposed between the control surface 41 of the engaging convex portion 29 c and the inner peripheral surface 31 a of the clutch collar portion 31 as shown in FIG. 4. Yes. The diameter of the rolling element 32 is smaller than the distance between the central portion (rotational direction central portion) 41a of the control surface 41 and the inner peripheral surface 31a, and the side portions (rotational direction end portions) 41b, 41c of the control surface 41 It is set larger than the length of the interval between the inner peripheral surfaces 31a. That is, the diameter of the rolling element 32 is set to be equal to the length of the interval between the central portion 41a and the intermediate portion 41d between the side portions 41b and 41c and the inner peripheral surface 31a.

サポート部材３３は、前記各転動体３２を回転可能にかつ略平行に等角度間隔で保持する。詳述すると、サポート部材３３は、樹脂製であって、図２及び図４に示すように、リング部３３ａ（図２参照）と、リング部３３ａから軸線方向に延びて前記転動体３２を周方向に挟むように（挟持しないように）配置される３対のサポート部３３ｂ（図４参照）とを備える。 The support member 33 holds the rolling elements 32 so as to be rotatable and substantially parallel at equal angular intervals. More specifically, the support member 33 is made of resin, and as shown in FIGS. 2 and 4, the ring member 33a (see FIG. 2) and the ring member 33a extend in the axial direction to surround the rolling element 32. 3 pairs of support parts 33b (refer FIG. 4) arrange | positioned so that it may be pinched | interposed in a direction (so that it may not clamp).

前記駆動側回転体３４は、樹脂材にて形成され、図２に示すように、前記回転軸６の連結部６ａが嵌着される軸部３４ａと、軸部３４ａよりも拡径された円盤部３４ｂと、円盤部３４ｂの軸中心から軸線方向（図２中、下方向）に延出した延出部３４ｃとを有している。延出部３４ｃの先端にはボール収容凹部３４ｄが形成され、このボール収容凹部３４ｄには、ボール３５が、その一部が延出部３４ｃの先端から突出した状態で保持されている。又、延出部３４ｃは、従動側回転体２９の凹部２９ｄ内に略収容され、その延出部３４ｃの先端から一部が突出するボール３５は、凹部２９ｄの底部に当接されている。 The drive-side rotating body 34 is formed of a resin material, and as shown in FIG. 2, a shaft portion 34a to which the connecting portion 6a of the rotating shaft 6 is fitted, and a disk whose diameter is larger than that of the shaft portion 34a. Part 34b and an extending part 34c extending in the axial direction (downward in FIG. 2) from the axial center of the disk part 34b. A ball receiving recess 34d is formed at the tip of the extending portion 34c, and the ball 35 is held in the ball receiving recess 34d in a state where a part of the ball 35 protrudes from the tip of the extending portion 34c. The extending portion 34c is substantially accommodated in the recessed portion 29d of the driven-side rotator 29, and the ball 35 partially protruding from the tip of the extending portion 34c is in contact with the bottom portion of the recessed portion 29d.

駆動側回転体３４の円盤部３４ｂの先端側（図２中、下側）には、図４に示すように、径方向外側及び軸線方向に突出する略扇形状の突設部４２が等角度間隔に複数（３つ）形成されている。各突設部４２は、図４に示すように、大きい円弧の面が前記内周面３１ａより若干小さな径で同内周面３１ａに沿って形成されている。突設部４２には、径方向内側から突設部４２の中間まで径方向に延びる嵌合溝４２ａが形成されている。突設部４２は、クラッチカラー部３１内において、従動側回転体２９の各係合凸部２９ｃ間であって、各転動体３２（各サポート部３３ｂ）間に配置されている。 As shown in FIG. 4, a substantially fan-shaped projecting portion 42 projecting radially outward and in the axial direction is equiangular on the distal end side (lower side in FIG. 2) of the disk portion 34b of the drive side rotating body 34. A plurality (three) are formed at intervals. As shown in FIG. 4, each protruding portion 42 is formed along the inner peripheral surface 31a with a large arc surface having a slightly smaller diameter than the inner peripheral surface 31a. The protruding portion 42 is formed with a fitting groove 42 a extending in the radial direction from the radially inner side to the middle of the protruding portion 42. The projecting portions 42 are disposed in the clutch collar portion 31 between the engaging convex portions 29c of the driven-side rotating body 29 and between the rolling elements 32 (support portions 33b).

嵌合溝４２ａには、ゴムよりなる緩衝部材４３が嵌合固定されている。緩衝部材４３には、嵌合溝４２ａから突設部４２の径方向内側に突出し、周方向に広がる緩衝部４３ａが形成されている。 A buffer member 43 made of rubber is fitted and fixed in the fitting groove 42a. The buffer member 43 is formed with a buffer portion 43a that protrudes radially inward of the projecting portion 42 from the fitting groove 42a and spreads in the circumferential direction.

緩衝部４３ａの周方向の幅は、図４に示すように、突設部４２の内周面の周方向の幅より若干大きく設定されている。
緩衝部４３ａの一側面（反時計回り側の面）４３ｂは、駆動側回転体３４が従動側回転体２９に対して反時計回り方向（矢印Ｘ方向）に所定位置まで回転すると、係合凸部２９ｃの時計回り側の面の径方向内側に形成された第１緩衝面２９ｅと当接する。又、突設部４２の径方向内側に形成される一側面（反時計回り側の面）４２ｂは、駆動側回転体３４が前記所定位置より更に反時計回り方向（矢印Ｘ方向）に回転すると、係合凸部２９ｃの時計回り側の面の径方向外側に形成された第１当接面２９ｆと当接する。尚、駆動側回転体３４は、緩衝部４３ａが周方向に撓む（潰れる）ことにより、前記所定位置より更に反時計回り方向（矢印Ｘ方向）に回転する（図５参照）。 As shown in FIG. 4, the circumferential width of the buffer portion 43 a is set slightly larger than the circumferential width of the inner circumferential surface of the projecting portion 42.
One side surface (counterclockwise surface) 43b of the buffer portion 43a is engaged when the drive-side rotator 34 rotates to a predetermined position in the counterclockwise direction (arrow X direction) with respect to the driven-side rotator 29. It abuts on a first buffer surface 29e formed on the radially inner side of the surface of the portion 29c in the clockwise direction. Further, one side surface (counterclockwise surface) 42b formed on the radially inner side of the projecting portion 42 is when the driving side rotating body 34 further rotates counterclockwise (arrow X direction) from the predetermined position. Then, it comes into contact with the first contact surface 29f formed on the radially outer side of the surface on the clockwise side of the engagement convex portion 29c. The drive side rotating body 34 further rotates counterclockwise (arrow X direction) from the predetermined position when the buffer portion 43a bends (crushes) in the circumferential direction (see FIG. 5).

又、緩衝部４３ａの他側面（反時計回り側の面）４３ｃは、駆動側回転体３４が従動側回転体２９に対して時計回り方向（矢印Ｙ方向）に所定位置まで回転すると、係合凸部２９ｃの反時計回り側の面の径方向内側に形成された第２緩衝面２９ｇと当接する。又、突設部４２の径方向内側に形成される他側面（時計回り側の面）４２ｃは、駆動側回転体３４が前記所定位置より更に時計回り方向（矢印Ｙ方向）に回転すると、係合凸部２９ｃの反時計回り側の面の径方向外側に形成された第２当接面２９ｈと当接する。尚、駆動側回転体３４は、緩衝部４３ａが周方向に撓む（潰れる）ことにより、前記所定位置より更に時計回り方向（矢印Ｙ方向）に回転する。 Further, the other side surface (counterclockwise surface) 43c of the buffer portion 43a is engaged when the driving side rotating body 34 rotates clockwise (arrow Y direction) with respect to the driven side rotating body 29 to a predetermined position. It abuts against a second buffer surface 29g formed on the radially inner side of the counterclockwise surface of the convex portion 29c. Further, the other side surface (clockwise side surface) 42c formed on the radially inner side of the projecting portion 42 is engaged when the drive side rotating body 34 rotates further clockwise (arrow Y direction) from the predetermined position. It abuts on a second abutment surface 29h formed on the radially outer side of the counterclockwise surface of the mating convex portion 29c. The drive-side rotator 34 rotates further in the clockwise direction (arrow Y direction) from the predetermined position when the buffer portion 43a is bent (collapsed) in the circumferential direction.

ここで、各部材３２，４２，２９ｃ，３３ｂの形状は、図５に示すように、突設部４２の一側面４２ｂが係合凸部２９ｃの第１当接面２９ｆと当接し、突設部４２の反時計回り側の面の径方向外側に形成された第１押圧面４２ｄがサポート部３３ｂと当接した状態で、転動体３２が制御面４１の中央部４１ａと対応した位置に配置されるように設定されている。 Here, as shown in FIG. 5, the shape of each member 32, 42, 29c, 33b is such that one side surface 42b of the projecting portion 42 abuts on the first contact surface 29f of the engaging convex portion 29c. The rolling element 32 is disposed at a position corresponding to the central portion 41a of the control surface 41 in a state where the first pressing surface 42d formed on the radially outer side of the counterclockwise surface of the portion 42 is in contact with the support portion 33b. Is set to be.

又、各部材３２，４２，２９ｃ，３３ｂの形状は、突設部４２の他側面４２ｃが係合凸部２９ｃの第２当接面２９ｈと当接し、突設部４２の時計回り側の面の径方向外側に形成された第２押圧面４２ｅがサポート部３３ｂと当接した状態で、転動体３２が制御面４１の中央部４１ａと対応した位置に配置されるように設定されている。 Further, the shape of each member 32, 42, 29c, 33b is such that the other side surface 42c of the projecting portion 42 contacts the second contact surface 29h of the engaging convex portion 29c, and the clockwise surface of the projecting portion 42 is formed. The rolling element 32 is set to be disposed at a position corresponding to the central portion 41a of the control surface 41 in a state where the second pressing surface 42e formed on the outer side in the radial direction is in contact with the support portion 33b.

このように構成されたモータ１（クラッチ３０）では、モータ本体２が駆動され回転軸６が図４の反時計回り方向（矢印Ｘ方向）に回転されると、回転軸６と共に駆動側回転体３４（突設部４２）が同方向（矢印Ｘ方向）に一体回転する。そして、図５に示すように、突設部４２の一側面４２ｂが係合凸部２９ｃの第１当接面２９ｆと当接し、第１押圧面４２ｄがサポート部３３ｂと当接すると、転動体３２が制御面４１の中央部４１ａと対応した位置（以下、中立位置という）に配置される。 In the motor 1 configured as described above (clutch 30), when the motor body 2 is driven and the rotating shaft 6 is rotated in the counterclockwise direction (arrow X direction) in FIG. 34 (projecting portion 42) rotates integrally in the same direction (arrow X direction). As shown in FIG. 5, when the one side surface 42b of the projecting portion 42 comes into contact with the first contact surface 29f of the engagement convex portion 29c and the first pressing surface 42d comes into contact with the support portion 33b, the rolling element 32 is disposed at a position corresponding to the central portion 41a of the control surface 41 (hereinafter referred to as a neutral position).

尚、突設部４２の一側面４２ｂが第１当接面２９ｆに当接する前に、緩衝部４３ａの一側面４３ｂが係合凸部２９ｃの第１緩衝面２９ｅに先に接触するため、該当接時の衝撃は小さくなる。 In addition, before the one side surface 42b of the projecting portion 42 contacts the first contact surface 29f, the one side surface 43b of the buffer portion 43a contacts the first buffer surface 29e of the engaging convex portion 29c first. The impact on contact is reduced.

この中立状態では、転動体３２は係合凸部２９ｃの制御面４１と前記内周面３１ａにて挟持されないため、従動側回転体２９はクラッチカラー部３１に対して回転可能となる。従って、駆動側回転体３４が更に反時計回り方向に回転すると、その回転力が突設部４２から従動側回転体２９に伝達され、従動側回転体２９が連れ回りする。尚、このとき転動体３２には第１押圧面４２ｄから同方向（矢印Ｘ方向）の回転力が伝達され、転動体３２は同方向に移動する。 In this neutral state, the rolling element 32 is not sandwiched between the control surface 41 of the engaging convex portion 29 c and the inner peripheral surface 31 a, so that the driven side rotating body 29 can rotate with respect to the clutch collar portion 31. Therefore, when the driving side rotating body 34 further rotates counterclockwise, the rotational force is transmitted from the projecting portion 42 to the driven side rotating body 29, and the driven side rotating body 29 is rotated. At this time, the rotational force in the same direction (arrow X direction) is transmitted to the rolling element 32 from the first pressing surface 42d, and the rolling element 32 moves in the same direction.

逆に、回転軸６が図４の時計回り方向（矢印Ｙ方向）に回転されると、上記と同様に、突設部４２により転動体３２が中立位置に配置される。この状態では、転動体３２は係合凸部２９ｃの制御面４１と前記内周面３１ａにて挟持されないため、従動側回転体２９はクラッチカラー部３１に対して回転可能となる。従って、駆動側回転体３４の回転力が突設部４２から従動側回転体２９に伝達され、従動側回転体２９が連れ回りする。 Conversely, when the rotating shaft 6 is rotated in the clockwise direction in FIG. 4 (arrow Y direction), the rolling element 32 is disposed at the neutral position by the projecting portion 42 as described above. In this state, since the rolling element 32 is not sandwiched between the control surface 41 of the engaging convex portion 29 c and the inner peripheral surface 31 a, the driven side rotating body 29 can rotate with respect to the clutch collar portion 31. Accordingly, the rotational force of the driving side rotating body 34 is transmitted from the projecting portion 42 to the driven side rotating body 29, and the driven side rotating body 29 is rotated.

すると、従動側回転体２９と共にウォーム軸１４が回転し、その回転に応じてウォームホイール２２及び出力軸２３が回転する。従って、出力軸２３に連結されるウインドガラスが開閉される。 Then, the worm shaft 14 rotates together with the driven-side rotator 29, and the worm wheel 22 and the output shaft 23 rotate according to the rotation. Accordingly, the window glass connected to the output shaft 23 is opened and closed.

一方、モータ１が停止している状態で、出力軸２３側に負荷がかかると、その負荷は従動側回転体２９を回動させようとする。そして、従動側回転体２９が図４の時計回り方向（矢印Ｙ方向）に回転されると、転動体３２は係合凸部２９ｃの制御面４１の側部４１ｂ側（中間部４１ｄ側）に相対移動する。やがて、図６に示すように、転動体３２が中間部４１ｄまで相対移動すると、転動体３２は、制御面４１と前記内周面３１ａで挟持される（ロック状態となる）。よって、従動側回転体２９のそれ以上の回転は阻止され、駆動側回転体３４を連れ回りさせることはない。 On the other hand, when a load is applied to the output shaft 23 while the motor 1 is stopped, the load tries to rotate the driven-side rotator 29. When the driven-side rotator 29 is rotated in the clockwise direction (arrow Y direction) in FIG. 4, the rolling element 32 is moved to the side portion 41b side (intermediate portion 41d side) of the control surface 41 of the engaging convex portion 29c. Move relative. Eventually, as shown in FIG. 6, when the rolling element 32 relatively moves to the intermediate portion 41d, the rolling element 32 is sandwiched between the control surface 41 and the inner peripheral surface 31a (becomes locked). Therefore, the further rotation of the driven side rotating body 29 is prevented, and the driving side rotating body 34 is not rotated.

逆に、従動側回転体２９が図４の反時計回り方向（矢印Ｘ方向）に回転されると、駆動側回転体３４が停止しているため、転動体３２は係合凸部２９ｃの制御面４１の側部４１ｃ側（中間部４１ｄ側）に相対移動する。やがて、転動体３２が中間部４１ｄまで相対移動すると、転動体３２は、制御面４１と前記内周面３１ａで挟持される（ロック状態となる）。よって、従動側回転体２９のそれ以上の回転は阻止され、駆動側回転体３４を連れ回りさせることはない。 Conversely, when the driven side rotating body 29 is rotated in the counterclockwise direction (arrow X direction) in FIG. 4, the driving side rotating body 34 is stopped, so that the rolling body 32 controls the engagement convex portion 29c. It moves relative to the side 41c side (intermediate part 41d side) of the surface 41. Eventually, when the rolling element 32 relatively moves to the intermediate portion 41d, the rolling element 32 is sandwiched between the control surface 41 and the inner peripheral surface 31a (becomes locked). Therefore, the further rotation of the driven side rotating body 29 is prevented, and the driving side rotating body 34 is not rotated.

このように、出力軸２３側に大きな負荷をかけても、従動側回転体２９の回転は阻止される。従って、出力軸２３に連結されるウインドガラスが自重や、外力により開閉されることは防止される。 As described above, even if a large load is applied to the output shaft 23 side, the rotation of the driven side rotating body 29 is prevented. Therefore, the window glass connected to the output shaft 23 is prevented from being opened and closed by its own weight or an external force.

次に、上記実施の形態の特徴的な作用効果を以下に記載する。
（１）ヨーク４と直接係合する係合部（端部係合部１２ｃ及び内周係合部１２ｄ）を有した金属製の軸受保持部材１２の連結軸基端軸受固定部１２ｆにウォーム軸１４の基端側を支持する軸受１５が固定されるため、樹脂製のギヤハウジング２１の成形寸法精度に関わらず、ヨーク４の底部で回転軸６の基端側を支持する軸受１０とギヤハウジング２１内でウォーム軸１４の基端側を支持する軸受１５との同軸度を高精度とすることができる。よって、樹脂製のギヤハウジング２１の成形を容易としながら、回転軸６とウォーム軸１４の同軸度を高精度とすることができ、それらの軸ずれに基づく異音発生や効率低下を低減することができる。 Next, characteristic effects of the above embodiment will be described below.
(1) The worm shaft is connected to the connecting shaft proximal bearing fixing portion 12f of the metal bearing holding member 12 having the engaging portions (the end engaging portion 12c and the inner peripheral engaging portion 12d) that directly engage with the yoke 4. Since the bearing 15 that supports the base end side of the bearing 14 is fixed, the bearing 10 and the gear housing that support the base end side of the rotary shaft 6 at the bottom of the yoke 4 regardless of the molding dimensional accuracy of the resin gear housing 21. The degree of coaxiality with the bearing 15 that supports the proximal end side of the worm shaft 14 within the shaft 21 can be made highly accurate. Therefore, it is possible to make the coaxiality of the rotary shaft 6 and the worm shaft 14 highly accurate while facilitating the molding of the resin gear housing 21, and to reduce the generation of abnormal noise and a decrease in efficiency due to the shaft misalignment. Can do.

（２）ブラシホルダ本体１１と軸受保持部材１２とは一体成形されるため、（例えば、別体とした場合に比べて）組み付けが容易となる。さらに、樹脂製のブラシホルダ本体１１によりヨーク４と直接係合する軸受保持部材１２の振動（金属同士の係合による振動の増幅）が抑制される。 (2) Since the brush holder main body 11 and the bearing holding member 12 are integrally formed, it is easy to assemble (for example, as compared with a case where they are separated). Further, the vibration of the bearing holding member 12 that is directly engaged with the yoke 4 by the resin brush holder body 11 (amplification of vibration due to the engagement of metals) is suppressed.

（３）回転軸６の先端部とウォーム軸１４の基端部は、円形の内周面３１ａで転動体３２を挟持するか否かによって、回転軸６からの回転力をウォーム軸１４に伝達し、ウォーム軸１４からの回転力を回転軸６に伝達しないクラッチ３０を介して連結される。そして、一般的にこのようなクラッチの円形の内周面を有するカラー部材はギヤハウジングに固定されるが、本実施の形態では、円形の内周面を有するクラッチカラー部３１は、前記軸受保持部材１２に備えられるため、樹脂製のギヤハウジング２１の成形寸法精度に関わらず、クラッチ３０と前記両軸受１０，１５との同軸度を高精度とすることができる。よって、樹脂製のギヤハウジング２１の成形を容易としながら、回転軸６とウォーム軸１４とクラッチ３０の同軸度を高精度とすることができ、それらの軸ずれに基づく異音発生や効率低下やクラッチ３０の動作不良を低減することができる。 (3) The tip of the rotating shaft 6 and the base end of the worm shaft 14 transmit the rotational force from the rotating shaft 6 to the worm shaft 14 depending on whether or not the rolling element 32 is sandwiched between the circular inner peripheral surfaces 31a. The rotational force from the worm shaft 14 is coupled via a clutch 30 that does not transmit to the rotational shaft 6. In general, a collar member having a circular inner peripheral surface of such a clutch is fixed to the gear housing. In this embodiment, the clutch collar portion 31 having a circular inner peripheral surface is provided with the bearing holding member. Since the member 12 is provided, the coaxiality between the clutch 30 and the bearings 10 and 15 can be made high accuracy regardless of the molding dimensional accuracy of the resin gear housing 21. Accordingly, the coaxiality of the rotary shaft 6, the worm shaft 14 and the clutch 30 can be made highly accurate while facilitating the molding of the resin gear housing 21, and the generation of abnormal noise and the reduction in efficiency due to the shaft misalignment can be achieved. The malfunction of the clutch 30 can be reduced.

（４）前記軸受保持部材１２の回転軸軸受固定部１２ｅに回転軸６の先端側を回転可能に支持する軸受１３が固定されるため、例えば、該軸受１３をヨーク４に組み付けられる樹脂製のブラシホルダに固定する場合に比べて、回転軸６の先端側を支持する軸受１３についても前記両軸受１０，１５との同軸度を高精度とすることができる。よって、例えば、樹脂製のブラシホルダ（ブラシホルダ本体１１）の成形寸法精度に関わらず、即ちその成形を容易としながら、回転軸６とウォーム軸１４の同軸度をより高精度とすることができ、それらの軸ずれに基づく異音発生や効率低下をより低減することができる。 (4) Since the bearing 13 that rotatably supports the distal end side of the rotating shaft 6 is fixed to the rotating shaft bearing fixing portion 12e of the bearing holding member 12, for example, the resin 13 that is assembled to the yoke 4 is made of resin. Compared with the case of fixing to the brush holder, the coaxiality of the bearings 13 and 15 that support the distal end side of the rotating shaft 6 can be made high accuracy. Therefore, for example, the coaxiality of the rotary shaft 6 and the worm shaft 14 can be made more accurate regardless of the molding dimensional accuracy of the resin brush holder (brush holder main body 11), that is, while facilitating the molding. Therefore, it is possible to further reduce the generation of abnormal noise and the decrease in efficiency based on the misalignment.

（５）軸受保持部材１２において、ヨーク４と直接係合する係合部は、ヨーク４の内周面４ｃと直接係合（当接）する内周係合部１２ｄと、ヨーク４の開口方向端部のフランジ部４ｂと直接係合（当接）する端部係合部１２ｃとを備える。このようにすると、内周係合部１２ｄがヨーク４の内周面４ｃと直接係合することで軸受保持部材１２、ひいてはそれに固定される軸受１３，１５等の軸直交方向位置の位置決めが高精度となる。又、端部係合部１２ｃがヨーク４の開口方向端部（フランジ部４ｂ）と直接係合することで軸受保持部材１２、ひいてはそれに固定される軸受１３，１５等の軸線方向位置の位置決めが高精度となる。 (5) In the bearing holding member 12, the engaging portion that directly engages with the yoke 4 includes an inner peripheral engaging portion 12 d that directly engages (contacts) with the inner peripheral surface 4 c of the yoke 4, and the opening direction of the yoke 4. An end engaging portion 12c that directly engages (contacts) the flange portion 4b of the end portion is provided. In this way, the inner peripheral engagement portion 12d directly engages with the inner peripheral surface 4c of the yoke 4, so that the positioning of the bearing holding member 12, and the bearings 13 and 15 fixed to the bearing holding member 12, and the bearings 13 and 15 fixed in the axial orthogonal direction position is high. It becomes accuracy. Further, the end engaging portion 12c is directly engaged with the opening direction end portion (flange portion 4b) of the yoke 4 so that the axial position of the bearing holding member 12 and the bearings 13 and 15 fixed thereto can be positioned. High accuracy.

（６）クラッチカラー部３１及び回転軸軸受固定部１２ｅは、連結軸基端軸受固定部１２ｆと同径の筒状に形成されるため、例えば、クラッチカラー部３１や回転軸軸受固定部１２ｅが連結軸基端軸受固定部１２ｆと異なる径の筒状に形成された場合に比べて、軸受保持部材１２が単純な形状となり、その製造が容易となる。 (6) Since the clutch collar portion 31 and the rotary shaft bearing fixing portion 12e are formed in a cylindrical shape having the same diameter as the connecting shaft base end bearing fixing portion 12f, for example, the clutch collar portion 31 and the rotary shaft bearing fixing portion 12e are provided. Compared to the case where the connecting shaft base end bearing fixing portion 12f is formed in a cylindrical shape having a different diameter, the bearing holding member 12 has a simple shape and is easy to manufacture.

上記実施の形態は、以下のように変更してもよい。
・上記実施の形態の軸受保持部材１２は、図７に示すように、ウォーム軸１４（連結軸）の先端側を回転可能に支持する軸受５１が固定される連結軸先端軸受固定部５２を備えたものとしてもよい。即ち、図７に示すように、上記実施の形態の軸受保持部材１２における筒状部１２ｂを延長しその先端部を連結軸先端軸受固定部５２としてもよい。 The above embodiment may be modified as follows.
As shown in FIG. 7, the bearing holding member 12 of the above embodiment includes a connecting shaft tip bearing fixing portion 52 to which a bearing 51 that rotatably supports the tip side of the worm shaft 14 (connecting shaft) is fixed. It is also good. That is, as shown in FIG. 7, the cylindrical portion 12 b in the bearing holding member 12 of the above embodiment may be extended and its tip portion may be used as a connecting shaft tip bearing fixing portion 52.

このようにすると、前記軸受保持部材１２の連結軸先端軸受固定部５２にウォーム軸１４の先端側を回転可能に支持する軸受５１が固定されるため、その軸受５１についても他の軸受１０，１３，１５との同軸度を高精度とすることができる。よって、樹脂製のギヤハウジング２１の成形寸法精度に関わらず、即ちその成形を容易としながら、回転軸６とウォーム軸１４の同軸度をより高精度とすることができ、それらの軸ずれに基づく異音発生や効率低下をより低減することができる。 In this way, the bearing 51 that rotatably supports the distal end side of the worm shaft 14 is fixed to the connecting shaft distal end bearing fixing portion 52 of the bearing holding member 12, so that the bearing 51 also has other bearings 10, 13. , 15 can be made highly accurate. Therefore, irrespective of the molding dimensional accuracy of the resin gear housing 21, that is, while facilitating the molding, the coaxiality of the rotary shaft 6 and the worm shaft 14 can be made more accurate, and based on the misalignment thereof. Abnormal noise generation and efficiency reduction can be further reduced.

・上記実施の形態では、軸受保持部材１２にクラッチカラー部３１や回転軸軸受固定部１２ｅを形成したが、これに限定されず、クラッチカラー部３１と同様の機能を有するカラー部材や前記軸受１３を樹脂製の他の部材（ギヤハウジング２１やブラシホルダ本体１１）に固定して設けるようにしてもよい。 In the above embodiment, the clutch collar portion 31 and the rotary shaft bearing fixing portion 12e are formed on the bearing holding member 12. However, the present invention is not limited to this, and the collar member having the same function as the clutch collar portion 31 or the bearing 13 is used. May be fixed to other members made of resin (gear housing 21 or brush holder body 11).

・上記実施の形態では、軸受保持部材１２の係合部は、内周係合部１２ｄと端部係合部１２ｃとを備えるとしたが、ヨーク４に対して直接係合してヨーク４との相対位置がずれなければ他の係合部に変更してもよい。 In the above embodiment, the engaging portion of the bearing holding member 12 includes the inner peripheral engaging portion 12d and the end engaging portion 12c. If the relative position is not shifted, it may be changed to another engaging portion.

・上記実施の形態では、クラッチカラー部３１及び回転軸軸受固定部１２ｅは、連結軸基端軸受固定部１２ｆと同径の筒状に形成されるとしたが、これに限定されず、例えば、クラッチカラー部３１や回転軸軸受固定部１２ｅを連結軸基端軸受固定部１２ｆと異なる径の筒状に形成してもよい。 In the above embodiment, the clutch collar portion 31 and the rotary shaft bearing fixing portion 12e are formed in a cylindrical shape having the same diameter as the connecting shaft base end bearing fixing portion 12f. The clutch collar portion 31 and the rotary shaft bearing fixing portion 12e may be formed in a cylindrical shape having a diameter different from that of the connecting shaft base end bearing fixing portion 12f.

・上記実施の形態のクラッチ３０の代わりに、回転軸６とウォーム軸１４を連結する他の連結部材（例えば、回転軸６とウォーム軸１４とが単純に一体回転するように連結するだけの構成）に変更してもよい。 In place of the clutch 30 of the above-described embodiment, another connecting member that connects the rotary shaft 6 and the worm shaft 14 (for example, a configuration in which the rotary shaft 6 and the worm shaft 14 are simply connected so as to integrally rotate). ) May be changed.

・上記実施の形態では、軸受保持部材１２は、樹脂製のブラシホルダ本体１１にアウトサート成形されたものとしたが、これに限定されず、例えば、ブラシホルダ本体１１と組み付けられるものとしてもよい。又、例えば、給電ブラシＢを保持する樹脂製のブラシホルダ（ブラシホルダ本体１１）を軸受保持部材１２とは別体で構成してそのブラシホルダを軸受保持部材１２とは別にヨーク４と組み付ける構成としてもよい。 In the above embodiment, the bearing holding member 12 is outsert-molded on the resin brush holder main body 11, but is not limited thereto, and may be assembled with the brush holder main body 11, for example. . In addition, for example, a resin brush holder (brush holder body 11) that holds the power supply brush B is configured separately from the bearing holding member 12, and the brush holder is assembled with the yoke 4 separately from the bearing holding member 12. It is good.

・上記実施の形態では、本発明を車両パワーウインドウ装置用のモータ１に具体化したが、他の装置に使用されるモータに具体化してもよい。
上記各実施の形態から把握できる技術的思想について、以下にその効果とともに記載する。 -In above-mentioned embodiment, although this invention was actualized to the motor 1 for vehicle power window apparatuses, you may materialize to the motor used for another apparatus.
The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.

（イ）前記連結軸基端軸受固定部は、その内周面に軸受の外周が固定される筒状に形成され、前記クラッチカラー部、前記回転軸軸受固定部、及び前記連結軸先端軸受固定部の少なくとも１つは、前記連結軸基端軸受固定部と同径の筒状に形成されたことを特徴とする。 (B) pre-Symbol connecting shaft proximal bearing fixing portion, the outer periphery of the bearing is formed in a cylindrical shape is fixed to the inner peripheral surface thereof, said clutch collar, the rotary shaft bearing fixing portion, and the connecting shaft tip bearing At least one of the fixing portion, you wherein formed on the connecting shaft proximal bearing fixing portion and the same diameter of the tubular.

同構成によれば、前記クラッチカラー部、前記回転軸軸受固定部、及び前記連結軸先端軸受固定部の少なくとも１つは、前記連結軸基端軸受固定部と同径の筒状に形成されるため、軸受保持部材が単純な形状となり、その製造が容易となる。例えば、請求項２に記載の構成にこの構成が適用されると、クラッチカラー部が連結軸基端軸受固定部と同径の筒状に形成されるため、クラッチカラー部が連結軸基端軸受固定部と異なる径の筒状に形成された場合に比べて、軸受保持部材が単純な形状となり、その製造が容易となる。 According to this configuration, at least one of the clutch collar portion, the rotary shaft bearing fixing portion, and the connecting shaft tip bearing fixing portion is formed in a cylindrical shape having the same diameter as the connecting shaft base end bearing fixing portion. For this reason, the bearing holding member has a simple shape and is easy to manufacture. For example, when this configuration is applied to the configuration according to claim 2, the clutch collar portion is formed in a cylindrical shape having the same diameter as the connecting shaft base end bearing fixing portion, so that the clutch collar portion is connected to the connecting shaft base end bearing. The bearing holding member has a simple shape as compared with the case where it is formed in a cylindrical shape having a diameter different from that of the fixed portion, and its manufacture is facilitated.

本実施の形態におけるモータの一部断面図。FIG. 2 is a partial cross-sectional view of a motor in the present embodiment. 本実施の形態におけるモータの一部拡大断面図。FIG. 3 is a partially enlarged cross-sectional view of a motor in the present embodiment. 本実施の形態におけるモータ本体を軸線方向から見た一部断面図。The partial cross section figure which looked at the motor body in this embodiment from the direction of an axis. 本実施の形態におけるクラッチ部分の断面図。Sectional drawing of the clutch part in this Embodiment. 本実施の形態におけるクラッチの動作を説明するための断面図。Sectional drawing for demonstrating operation | movement of the clutch in this Embodiment. 本実施の形態におけるクラッチの動作を説明するための断面図。Sectional drawing for demonstrating operation | movement of the clutch in this Embodiment. 別例におけるモータの一部断面図。The partial sectional view of the motor in another example.

符号の説明Explanation of symbols

２…モータ本体、３…減速部（連結駆動部）、４…ヨーク、６…回転軸、１０，１３，１５，５１…軸受、１１…ブラシホルダ本体、１２…軸受保持部材、１２ｃ…端部係合部（係合部）、１２ｄ…内周係合部（係合部）、１２ｅ…回転軸軸受固定部、１２ｆ…連結軸基端軸受固定部、１４…ウォーム軸（連結軸）、２１…ギヤハウジング（ハウジング）、３０…クラッチ（連結部材）、３１…クラッチカラー部、３１ａ…内周面、３２…転動体、５２…連結軸先端軸受固定部。 DESCRIPTION OF SYMBOLS 2 ... Motor main body, 3 ... Deceleration part (connection drive part), 4 ... Yoke, 6 ... Rotary shaft, 10, 13, 15, 51 ... Bearing, 11 ... Brush holder main body, 12 ... Bearing holding member, 12c ... End part Engagement part (engagement part), 12d ... Inner circumference engagement part (engagement part), 12e ... Rotating shaft bearing fixing part, 12f ... Connection shaft base end bearing fixing part, 14 ... Worm shaft (connection shaft), 21 DESCRIPTION OF SYMBOLS ... Gear housing (housing), 30 ... Clutch (connection member), 31 ... Clutch collar part, 31a ... Inner peripheral surface, 32 ... Rolling element, 52 ... Connection shaft front-end bearing fixing part.

Claims

略有底筒状のヨーク内に略収容されるとともに該ヨークの底部に固定された軸受にて自身の基端側が回転可能に支持された回転軸を回転駆動するモータ本体と、
前記ヨークの開口端に組み付けられる樹脂製のハウジング内に略収容されるとともに前記回転軸と同軸上で回転可能に支持され該回転軸の先端部と自身の基端部が連結部材を介して連結される連結軸を有した連結駆動部と
を備えたモータであって、
前記連結軸の基端側を回転可能に支持する軸受は、前記ヨークと直接係合する係合部を有した金属製の軸受保持部材の連結軸基端軸受固定部に固定され、該連結軸基端軸受固定部は、前記ハウジング内に収容されており、
単一部材の前記軸受保持部材は、前記連結軸基端軸受固定部と、前記回転軸の先端側を回転可能に支持する軸受が固定される回転軸軸受固定部とを含んで構成されたことを特徴とするモータ。 A motor main body that rotationally drives a rotating shaft that is substantially housed in a substantially bottomed cylindrical yoke and is rotatably supported by a bearing fixed to the bottom of the yoke;
It is substantially housed in a resin housing assembled to the opening end of the yoke, and is supported rotatably on the same axis as the rotation shaft, and the distal end portion of the rotation shaft and the base end portion of the rotation shaft are connected via a connecting member. A motor having a connecting drive unit having a connecting shaft,
The bearing that rotatably supports the base end side of the connecting shaft is fixed to a connecting shaft base end bearing fixing portion of a metal bearing holding member having an engaging portion that directly engages with the yoke , and the connecting shaft The proximal bearing fixing portion is accommodated in the housing,
The single-member bearing holding member includes the connecting shaft base end bearing fixing portion and a rotating shaft bearing fixing portion to which a bearing that rotatably supports the distal end side of the rotating shaft is fixed. A motor characterized by

請求項１に記載のモータにおいて、
前記モータ本体は、樹脂製のブラシホルダ本体を有するものであって、該ブラシホルダ本体は前記軸受保持部材に一体成形されたことを特徴とするモータ。 The motor according to claim 1,
The motor main body has a resin brush holder main body, and the brush holder main body is integrally formed with the bearing holding member.

請求項１又は２に記載のモータにおいて、
前記連結部材は、円形の内周面で転動体を挟持するか否かによって、前記回転軸からの回転力を前記連結軸に伝達し、前記連結軸からの回転力を前記回転軸に伝達しないクラッチであって、
前記軸受保持部材は、前記内周面を有する筒状のクラッチカラー部を備えたことを特徴とするモータ。 The motor according to claim 1 or 2,
The connecting member transmits the rotational force from the rotating shaft to the connecting shaft and does not transmit the rotating force from the connecting shaft to the rotating shaft depending on whether or not the rolling element is sandwiched between circular inner peripheral surfaces. A clutch,
The motor according to claim 1, wherein the bearing holding member includes a cylindrical clutch collar portion having the inner peripheral surface.

請求項１乃至３のいずれか１項に記載のモータにおいて、
前記軸受保持部材は、前記連結軸の先端側を回転可能に支持する軸受が固定される連結軸先端軸受固定部を備えたことを特徴とするモータ。 The motor according to any one of claims 1 to 3 ,
The motor according to claim 1, wherein the bearing holding member includes a connecting shaft tip bearing fixing portion to which a bearing that rotatably supports the tip side of the connecting shaft is fixed.

請求項１乃至４のいずれか１項に記載のモータにおいて、
前記係合部は、前記ヨークの内周面と直接係合する内周係合部と、前記ヨークの開口方向端部と直接係合する端部係合部とを備えたことを特徴とするモータ。 The motor according to any one of claims 1 to 4 ,
The engaging portion includes an inner peripheral engaging portion that directly engages with an inner peripheral surface of the yoke, and an end engaging portion that directly engages with an opening direction end portion of the yoke. motor.