JP2014107990A - Geared motor - Google Patents
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- JP2014107990A JP2014107990A JP2012260168A JP2012260168A JP2014107990A JP 2014107990 A JP2014107990 A JP 2014107990A JP 2012260168 A JP2012260168 A JP 2012260168A JP 2012260168 A JP2012260168 A JP 2012260168A JP 2014107990 A JP2014107990 A JP 2014107990A
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- 239000000463 material Substances 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 1
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Gear Transmission (AREA)
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Abstract
Description
本発明は、ギヤードモータに関するものである。 The present invention relates to a geared motor.
従来、ギヤードモータは、例えば特許文献１に示すように、モータ部と、そのモータ部の回転を減速する減速部とが一体に組み付けられて構成されている。減速部は、モータ部の回転軸と一体回転するウォーム軸と、そのウォーム軸の回転を減速して出力する減速出力部材とを備える。減速出力部材は、ウォーム軸と噛合するウォームホイールと、そのウォームホイールと一体回転する出力ギヤ部とを備えている。ウォームホイール及び出力ギヤ部は、ギヤハウジングに設けられた支軸部に回転可能に支持されており、支軸部及び出力ギヤ部はギヤハウジング外に延出されている。このようなギヤードモータでは、プッシュナット等の環状の抜け止め部材が、ギヤハウジングから露出された支軸部の先端から圧入固定されて、出力ギヤ部の軸方向先端と軸方向に当接されている。これにより、減速出力部材の軸方向への移動が規制され、減速出力部材が支軸部から抜け出てしまうことが防止されている。 Conventionally, as shown in Patent Document 1, for example, a geared motor is configured by integrally assembling a motor portion and a speed reduction portion that decelerates rotation of the motor portion. The speed reduction unit includes a worm shaft that rotates integrally with the rotation shaft of the motor unit, and a deceleration output member that decelerates and outputs the rotation of the worm shaft. The deceleration output member includes a worm wheel that meshes with the worm shaft, and an output gear portion that rotates integrally with the worm wheel. The worm wheel and the output gear portion are rotatably supported by a support shaft portion provided in the gear housing, and the support shaft portion and the output gear portion extend outside the gear housing. In such a geared motor, an annular retaining member such as a push nut is press-fitted and fixed from the distal end of the support shaft portion exposed from the gear housing, and is in axial contact with the axial distal end of the output gear portion. Yes. Thereby, the movement of the deceleration output member in the axial direction is restricted, and the deceleration output member is prevented from coming out of the support shaft portion.
しかしながら、上記のようなギヤードモータでは、支軸部を例えば樹脂材料等で構成した場合、支軸部に対する抜け止め部材の圧入時に、支軸部の削りかすが多く生じるという問題があった。 However, in the geared motor as described above, when the support shaft portion is made of, for example, a resin material, there is a problem that a lot of shaving of the support shaft portion occurs when the retaining member is pressed into the support shaft portion.
本発明は、上記課題を解決するためになされたものであって、その目的は、抜け止め部材の圧入時に生じる支軸部の削りかすを少なく抑えることができるギヤードモータを提供することにある。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a geared motor that can suppress shaving of a support shaft portion that occurs when a retaining member is press-fitted.
上記課題を解決するギヤードモータは、モータ部と減速部とが一体に組み付けられてなるギヤードモータであって、前記減速部は、支軸部を有するギヤハウジングと、前記ギヤハウジング内に収容され、前記モータ部の回転軸に一体回転可能に連結されたウォーム軸と、前記支軸部に回転可能に支持され、前記ウォーム軸と噛合して前記回転軸の回転を減速して出力する減速出力部材と、前記支軸部に対してその先端側から組み付けられ、前記支軸部からの前記減速出力部材の抜け止めを行う環状の抜け止め部材とを備え、前記支軸部は、前記抜け止め部材が圧入固定された被圧入部よりも先端側において該被圧入部よりも小径をなす小径部を有している。 A geared motor that solves the above problems is a geared motor in which a motor part and a speed reduction part are integrally assembled, and the speed reduction part is housed in the gear housing having a support shaft part, A worm shaft connected to the rotating shaft of the motor portion so as to be integrally rotatable, and a deceleration output member that is rotatably supported by the support shaft portion and meshes with the worm shaft to decelerate and output the rotation of the rotating shaft. And an annular retaining member that prevents the deceleration output member from being detached from the support shaft portion, which is assembled to the support shaft portion from the front end side thereof, and the support shaft portion includes the retaining member. Has a small-diameter portion that is smaller in diameter than the press-fit portion on the tip side of the press-fit portion that is press-fitted and fixed.
この構成によれば、抜け止め部材の支軸部への組み付けの際、抜け止め部材は支軸部の小径部に外挿された後、被圧入部に達して圧入固定される。そして、この小径部は、被圧入部の径、つまり、抜け止め部材の内径よりも小さいため、抜け止め部材の圧入時に生じる支軸部の削りかすを少なく抑えることができる。 According to this configuration, when the retaining member is assembled to the support shaft portion, the retaining member is extrapolated to the small diameter portion of the support shaft portion, and then reaches the press-fit portion and is press-fitted and fixed. Since the small diameter portion is smaller than the diameter of the press-fit portion, that is, the inner diameter of the retaining member, it is possible to suppress the shavings of the support shaft portion generated when the retaining member is press-fitted.
前記小径部は、前記支軸部における前記被圧入部よりも先端側の部位の全体に亘って形成されていることが好ましい。
この構成によれば、支軸部の被圧入部よりも先端側の部位が全て小径部よりなるため、抜け止め部材の圧入時に生じる支軸部の削りかすをより少なく抑えることができる。
It is preferable that the small diameter portion is formed over the entire portion on the distal end side of the press-fit portion in the support shaft portion.
According to this configuration, since the portion on the tip side of the press-fit portion of the support shaft portion is all made of a small diameter portion, it is possible to reduce the shavings of the support shaft portion generated when the retaining member is press-fitted.
前記支軸部は、前記小径部と前記被圧入部との間にテーパ部を有していることが好ましい。
この構成によれば、小径部と被圧入部との間のテーパ部によって、抜け止め部材を被圧入部にスムーズに圧入させることができる。
It is preferable that the support shaft portion has a taper portion between the small diameter portion and the press-fit portion.
According to this configuration, the stopper member can be smoothly press-fitted into the press-fit portion by the tapered portion between the small diameter portion and the press-fit portion.
前記支軸部は、前記ギヤハウジングに一体形成された樹脂材料よりなることが好ましい。
この構成によれば、支軸部がギヤハウジングに一体形成されるため、部品点数を少なく抑えることができる。また、削れやすい樹脂材料よりなる支軸部に小径部を設けることで、その小径部による削りかすを抑える効果が顕著に発揮される。
The support shaft portion is preferably made of a resin material integrally formed with the gear housing.
According to this configuration, since the support shaft portion is integrally formed with the gear housing, the number of parts can be reduced. Moreover, the effect which suppresses the shavings by the small diameter part is exhibited notably by providing a small diameter part in the spindle part which consists of a resin material which is easy to grind.
従って、上記記載の発明によれば、抜け止め部材の圧入時に生じる支軸部の削りかすを少なく抑えることができる。 Therefore, according to the above-described invention, it is possible to suppress the shavings of the support shaft portion generated when the retaining member is press-fitted.
以下、本発明を具体化した一実施形態を図面に従って説明する。
図１に示すように、本実施形態のギヤードモータ１は、車両に搭載されるパワーウインド装置の駆動源として用いられるモータであり、モータ部２と減速部３とからなるギヤードモータにて構成されている。
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, a geared motor 1 according to the present embodiment is a motor used as a drive source for a power window device mounted on a vehicle, and is configured by a geared motor including a motor unit 2 and a speed reduction unit 3. ing.
モータ部２は、有底筒状に形成されたヨークハウジング１０と、このヨークハウジング１０の内周に固定された一対のマグネット１１と、ヨークハウジング１０内で回転可能に支持される電機子１２とを備えている。電機子１２は、その中心に回転軸１２ａを備え、回転軸１２ａの基端部（図１において下側部位）は、ヨークハウジング１０の底部中央に組み付けられた軸受（図示略）により回転可能に支持されている。また、電機子１２の整流子にはブラシ（共に図示略）が摺接するように構成されており、このブラシにはコネクタ（図示略）を介して外部から電源が供給され、前記ブラシから整流子に対して電源が供給されるようになっている。ヨークハウジング１０には、その開口側に径方向に延びるフランジ部１０ａが形成されており、このフランジ部１０ａはヨークハウジング１０を後述するギヤハウジング２０に対してネジ（図示略）にて固定するために設けられている。 The motor unit 2 includes a yoke housing 10 formed in a bottomed cylindrical shape, a pair of magnets 11 fixed to the inner periphery of the yoke housing 10, and an armature 12 that is rotatably supported in the yoke housing 10. It has. The armature 12 includes a rotation shaft 12a at the center thereof, and a base end portion (lower portion in FIG. 1) of the rotation shaft 12a can be rotated by a bearing (not shown) assembled at the bottom center of the yoke housing 10. It is supported. Further, a brush (both not shown) is configured to be in sliding contact with the commutator of the armature 12, and power is supplied to the brush from the outside via a connector (not shown), and the commutator is supplied from the brush. Is supplied with power. The yoke housing 10 is formed with a flange portion 10a extending in the radial direction on the opening side thereof, and this flange portion 10a is used to fix the yoke housing 10 to a gear housing 20 described later with screws (not shown). Is provided.
減速部３は、ギヤハウジング２０、ウォーム軸２１、減速出力部材２２及び蓋部材２３を備えている。ギヤハウジング２０は樹脂製であって、ウォーム軸２１を収容する軸収容部２０ａと、この軸収容部２０ａからウォーム軸２１の軸方向（回転軸１２ａの軸線Ｌ１方向）と直交する方向に延出するホイール収容部２０ｂとを備えている。ウォーム軸２１は、前記モータ部２から延びる回転軸１２ａと同一軸線Ｌ１上で駆動連結されている。 The speed reduction unit 3 includes a gear housing 20, a worm shaft 21, a speed reduction output member 22, and a lid member 23. The gear housing 20 is made of resin and extends in a direction perpendicular to the axial direction of the worm shaft 21 (the direction of the axis L1 of the rotary shaft 12a) from the shaft accommodating portion 20a that accommodates the worm shaft 21. Wheel receiving portion 20b. The worm shaft 21 is drivingly connected on the same axis L1 as the rotating shaft 12a extending from the motor unit 2.
図２（ａ）に示すように、ホイール収容部２０ｂは、有底筒状に形成され、その開口部２０ｃを閉塞するように蓋部材２３が装着されて構成され、略円盤状の蓋部材２３の中央部分には貫通孔２３ａが形成されている。ホイール収容部２０ｂには、その底部２０ｄの中央からホイール収容部２０ｂの延出方向と直交する方向（図２（ａ）における軸線Ｌ２方向）に延びる支軸部２４が一体形成されている。 As shown in FIG. 2 (a), the wheel housing portion 20b is formed in a bottomed cylindrical shape and is configured with a lid member 23 attached so as to close the opening 20c. A through-hole 23a is formed in the central portion. The wheel housing portion 20b is integrally formed with a support shaft portion 24 extending from the center of the bottom portion 20d in a direction perpendicular to the extending direction of the wheel housing portion 20b (in the direction of the axis L2 in FIG. 2A).
支軸部２４は、その根元部分に形成された第１支持部２４ａと、その第１支持部２４ａから軸線Ｌ２方向に延出形成された第２支持部２４ｂとを有している。第１及び第２支持部２４ａ，２４ｂは、軸線Ｌ２を中心とする略円柱状をなし、第２支持部２４ｂの径は第１支持部２４ａの径よりも小さく形成されている。また、第２支持部２４ｂの軸線Ｌ２方向の長さは、第１支持部２４ａの軸線Ｌ２方向の長さよりも長く形成されている。第２支持部２４ｂは、貫通孔２３ａを通って蓋部材２３の外側まで延出されている。この支軸部２４には、減速出力部材２２が外挿されて回転可能に支持されている。 The support shaft portion 24 has a first support portion 24a formed at the base portion thereof, and a second support portion 24b formed extending from the first support portion 24a in the direction of the axis L2. The first and second support portions 24a and 24b have a substantially cylindrical shape centered on the axis L2, and the diameter of the second support portion 24b is smaller than the diameter of the first support portion 24a. The length of the second support portion 24b in the direction of the axis L2 is longer than the length of the first support portion 24a in the direction of the axis L2. The second support portion 24b extends to the outside of the lid member 23 through the through hole 23a. A deceleration output member 22 is extrapolated on the support shaft 24 and is rotatably supported.
図２（ｂ）及び図３に示すように、第２支持部２４ｂは、後述のプッシュナット３６が圧入固定される被圧入部２４ｃと、被圧入部２４ｃよりも先端側（図２（ｂ）において上側）に形成された小径部２４ｄとを有している。被圧入部２４ｃ及び小径部２４ｄの外周面は、軸線Ｌ２を中心とする円形をなし、小径部２４ｄの外径Ｄ１は、被圧入部２４ｃの外径Ｄ２よりも小さく設定されている。また、小径部２４ｄは、支軸部２４における被圧入部２４ｃよりも先端側の部位の全体に亘って形成されている。また、支軸部２４の外周面において、小径部２４ｄと被圧入部２４ｃとの間には、支軸部２４の基端側ほど拡径するテーパ部２４ｅが形成されている。つまり、支軸部２４は、先端側の小径部２４ｄからテーパ部２４ｅを経て被圧入部２４ｃに移行するように形成されている。 As shown in FIGS. 2B and 3, the second support portion 24 b includes a press-fit portion 24 c into which a push nut 36 described later is press-fitted and fixed, and a front end side of the press-fit portion 24 c (FIG. 2B). And a small diameter portion 24d formed on the upper side). The outer peripheral surfaces of the press-fit portion 24c and the small-diameter portion 24d are circular with the axis L2 as the center, and the outer diameter D1 of the small-diameter portion 24d is set smaller than the outer diameter D2 of the press-fit portion 24c. Further, the small diameter portion 24d is formed over the entire portion of the support shaft portion 24 on the tip side of the press-fit portion 24c. Further, on the outer peripheral surface of the support shaft portion 24, a tapered portion 24e having a diameter increasing toward the proximal end side of the support shaft portion 24 is formed between the small diameter portion 24d and the press-fit portion 24c. That is, the support shaft portion 24 is formed so as to shift from the small diameter portion 24d on the distal end side to the press-fit portion 24c through the taper portion 24e.
図２（ａ）に示すように、減速出力部材２２は、前記ウォーム軸２１と噛合する円盤状のウォームホイール３１と、そのウォームホイール３１に一体形成された出力ギヤ部３２とを有する。 As shown in FIG. 2A, the deceleration output member 22 includes a disk-shaped worm wheel 31 that meshes with the worm shaft 21, and an output gear portion 32 that is integrally formed with the worm wheel 31.
ウォームホイール３１の外周縁部には、ウォーム軸２１に噛合される歯部３１ａが形成されている。ウォームホイール３１の中央部には、支軸部２４の軸線Ｌ２（中心軸線）を中心とする円筒状のボス部３１ｂが形成されている。ボス部３１ｂは、支軸部２４の第１支持部２４ａに外挿されている。これにより、ウォームホイール３１は、第１支持部２４ａにて軸線Ｌ２を中心として回転可能に支持されている。 A tooth portion 31 a that meshes with the worm shaft 21 is formed on the outer peripheral edge of the worm wheel 31. A cylindrical boss portion 31b centering on the axis L2 (center axis) of the support shaft portion 24 is formed at the center of the worm wheel 31. The boss portion 31 b is extrapolated to the first support portion 24 a of the support shaft portion 24. Accordingly, the worm wheel 31 is supported by the first support portion 24a so as to be rotatable about the axis L2.
ボス部３１ｂの基端部は、ホイール収容部２０ｂの底部２０ｄと軸線Ｌ２方向に当接している。一方、ボス部３１ｂの先端部には、軸線Ｌ２方向に延びる筒状の出力ギヤ部３２が形成されている。出力ギヤ部３２は、貫通孔２３ａを通って蓋部材２３の外側に露出されており、その露出する箇所の外周には出力用の歯部３２ａが形成されている。出力ギヤ部３２の内周面３２ｂは、支軸部２４の第２支持部２４ｂの外周面と当接する円形をなし、これにより、出力ギヤ部３２が第２支持部２４ｂによって回転可能に支持されている。この出力ギヤ部３２の先端面には、軸線Ｌ２方向に開口する段付の収容凹部３３が形成されている。 The base end portion of the boss portion 31b is in contact with the bottom portion 20d of the wheel housing portion 20b in the direction of the axis L2. On the other hand, a cylindrical output gear portion 32 extending in the direction of the axis L2 is formed at the tip of the boss portion 31b. The output gear portion 32 is exposed to the outside of the lid member 23 through the through hole 23a, and an output tooth portion 32a is formed on the outer periphery of the exposed portion. The inner peripheral surface 32b of the output gear portion 32 has a circular shape that comes into contact with the outer peripheral surface of the second support portion 24b of the support shaft portion 24, whereby the output gear portion 32 is rotatably supported by the second support portion 24b. ing. A stepped housing recess 33 that opens in the direction of the axis L <b> 2 is formed on the distal end surface of the output gear portion 32.
図２（ｂ）に示すように、収容凹部３３は、その底部に位置する第１凹部３３ａと、その第１凹部３３ａから段差部３３ｂを経て出力ギヤ部３２の先端側に形成された第２凹部３３ｃとを有している。第１凹部３３ａ及び第２凹部３３ｃは、出力ギヤ部３２の中心軸線（軸線Ｌ２と一致）を中心とする円形をなし、第１凹部３３ａの内径は第２凹部３３ｃの内径よりも小さく設定されている。この第１凹部３３ａの内周面と第２支持部２４ｂの外周面の間には、ゴムよりなるＯリング３４が介在されている、これにより、外部から水等の液体が支軸部２４と減速出力部材２２との間に浸入することが防止されている。 As shown in FIG. 2B, the housing recess 33 includes a first recess 33a located at the bottom thereof, and a second recess formed on the distal end side of the output gear portion 32 through the step 33b from the first recess 33a. And a recess 33c. The first recess 33a and the second recess 33c have a circular shape centered on the central axis of the output gear portion 32 (coincidence with the axis L2), and the inner diameter of the first recess 33a is set smaller than the inner diameter of the second recess 33c. ing. An O-ring 34 made of rubber is interposed between the inner peripheral surface of the first recess 33a and the outer peripheral surface of the second support portion 24b. It is prevented from entering between the deceleration output member 22.
また、収容凹部３３には、第２支持部２４ｂに遊嵌されるとともに段差部３３ｂと軸線Ｌ２方向に当接する円環状のワッシャ３５が収容されている。そして、そのワッシャ３５上（反段差部側の面）には、減速出力部材２２の抜け止めを行うプッシュナット３６（抜け止め部材）が設けられている。 The housing recess 33 houses an annular washer 35 that is loosely fitted to the second support portion 24b and contacts the stepped portion 33b in the direction of the axis L2. A push nut 36 (a retaining member) that prevents the deceleration output member 22 from coming off is provided on the washer 35 (the surface on the side opposite to the stepped portion).
図２（ｂ）及び図３に示すように、プッシュナット３６は、金属板材からプレス加工により成形された円盤状の部材である。プッシュナット３６は、軸線Ｌ２を中心とする円環状の基部３６ａを有している。基部３６ａには、その内周縁から径方向内側（第２支持部２４ｂ側）に突出する複数（本実施形態では８個）の係止片３６ｂが形成されている。複数の係止片３６ｂは、軸線Ｌ２を中心とする周方向に等間隔に設けられている。また、各係止片３６ｂは、第２支持部２４ｂの先端側に傾斜している。プッシュナット３６が第２支持部２４ｂの被圧入部２４ｃに対して圧入されることで、各係止片３６ｂの先端が被圧入部２４ｃの外周面に係止固定されている。 As shown in FIGS. 2B and 3, the push nut 36 is a disk-shaped member formed by pressing from a metal plate material. The push nut 36 has an annular base portion 36a centering on the axis L2. A plurality (eight in this embodiment) of locking pieces 36b are formed on the base portion 36a so as to protrude radially inward (on the second support portion 24b side) from the inner peripheral edge thereof. The plurality of locking pieces 36b are provided at equal intervals in the circumferential direction around the axis L2. Further, each locking piece 36b is inclined toward the distal end side of the second support portion 24b. When the push nut 36 is press-fitted into the press-fit portion 24c of the second support portion 24b, the tip of each locking piece 36b is locked and fixed to the outer peripheral surface of the press-fit portion 24c.
上記のように構成されたギヤードモータ１では、モータ部２の回転軸１２ａの回転駆動がウォーム軸２１及びウォームホイール３１にて減速されて出力ギヤ部３２に駆動伝達されるようになっている。そして、この出力ギヤ部３２が例えばワイヤ式のパワーウインド装置に用いられるプーリ（図示略）と駆動連結されることで、ウインドガラス（図示略）の開閉動作が可能とされている。 In the geared motor 1 configured as described above, the rotational drive of the rotating shaft 12a of the motor unit 2 is decelerated by the worm shaft 21 and the worm wheel 31 and transmitted to the output gear unit 32. The output gear 32 is connected to a pulley (not shown) used in, for example, a wire type power window device, so that the window glass (not shown) can be opened and closed.
次に、ギヤハウジング２０のホイール収容部２０ｂに対する減速出力部材２２の組付態様を本実施形態の作用と併せて説明する。
まず、減速出力部材２２を支軸部２４に外挿し、その後、Ｏリング３４及びワッシャ３５を装着する。
Next, the manner in which the deceleration output member 22 is assembled to the wheel housing portion 20b of the gear housing 20 will be described together with the operation of this embodiment.
First, the deceleration output member 22 is extrapolated to the support shaft portion 24, and then an O-ring 34 and a washer 35 are attached.
次に、支軸部２４の先端部、つまり、第２支持部２４ｂの小径部２４ｄにプッシュナット３６を外挿する。ここで、プッシュナット３６の支軸部２４への組み付け前の状態において、各係止片３６ｂ先端の内径は、第２支持部２４ｂの小径部２４ｄの外径Ｄ１よりも大きく、かつ、被圧入部２４ｃの外径Ｄ２よりも圧入代分小さく設定されている。これにより、第２支持部２４ｂの先端部に外挿されたプッシュナット３６は、各係止片３６ｂ先端で小径部２４ｄの外周面を削ることなく被圧入部２４ｃに達し、その被圧入部２４ｃに圧入固定される。プッシュナット３６が被圧入部２４ｃに圧入される際には、係止片３６ｂ先端がテーパ部２４ｅの外周面によって徐々に径方向外側に押し広げられるため、プッシュナット３６が被圧入部２４ｃにスムーズに圧入される。 Next, the push nut 36 is extrapolated to the distal end portion of the support shaft portion 24, that is, the small diameter portion 24d of the second support portion 24b. Here, in the state before the push nut 36 is assembled to the support shaft portion 24, the inner diameter of the distal end of each locking piece 36b is larger than the outer diameter D1 of the small diameter portion 24d of the second support portion 24b and is press-fitted. The outer diameter D2 of the portion 24c is set smaller than the press-fit allowance. Thereby, the push nut 36 extrapolated to the tip of the second support portion 24b reaches the press-fit portion 24c without cutting the outer peripheral surface of the small diameter portion 24d at the tip of each locking piece 36b, and the press-fit portion 24c. It is press-fitted and fixed. When the push nut 36 is press-fitted into the press-fit portion 24c, the distal end of the locking piece 36b is gradually pushed outward in the radial direction by the outer peripheral surface of the taper portion 24e. It is press-fitted into.
そして、被圧入部２４ｃに固定されたプッシュナット３６は、ホイール収容部２０ｂの底部２０ｄとで減速出力部材２２を軸線Ｌ２方向に挟持する。これにより、減速出力部材２２の軸線Ｌ２方向への移動が規制され、減速出力部材２２が支軸部２４から抜け出てしまうことが防止されている。 The push nut 36 fixed to the press-fit portion 24c sandwiches the deceleration output member 22 in the direction of the axis L2 with the bottom portion 20d of the wheel housing portion 20b. Thereby, the movement of the deceleration output member 22 in the direction of the axis L <b> 2 is restricted, and the deceleration output member 22 is prevented from coming off from the support shaft portion 24.
次に、本実施形態の特徴的な効果を記載する。
（１）支軸部２４は、プッシュナット３６が圧入固定された被圧入部２４ｃよりも先端側において該被圧入部２４ｃよりも小径をなす小径部２４ｄを有している。この構成によれば、プッシュナット３６の組み付けの際、プッシュナット３６は支軸部２４の小径部２４ｄに外挿された後、被圧入部２４ｃに達して圧入固定される。そして、この小径部２４ｄは、被圧入部２４ｃの径、つまり、プッシュナット３６の内径よりも小さいため、プッシュナット３６の圧入時に生じる支軸部２４の削りかすを少なく抑えることができる。
Next, characteristic effects of the present embodiment will be described.
(1) The support shaft portion 24 has a small-diameter portion 24d having a smaller diameter than the press-fit portion 24c on the tip side of the press-fit portion 24c to which the push nut 36 is press-fitted and fixed. According to this configuration, when the push nut 36 is assembled, the push nut 36 is externally inserted into the small diameter portion 24d of the support shaft portion 24, and then reaches the press-fit portion 24c to be press-fitted and fixed. And since this small diameter part 24d is smaller than the diameter of the to-be-inserted part 24c, ie, the internal diameter of the push nut 36, the shavings of the spindle part 24 which arise at the time of the press fit of the push nut 36 can be suppressed few.
（２）小径部２４ｄは、支軸部２４における被圧入部２４ｃよりも先端側の部位の全体に亘って形成されるため、プッシュナット３６の圧入時に生じる支軸部２４の削りかすをより少なく抑えることができる。 (2) Since the small-diameter portion 24d is formed over the entire portion of the support shaft portion 24 that is more distal than the press-fit portion 24c, less shaving of the support shaft portion 24 that occurs when the push nut 36 is press-fitted. Can be suppressed.
（３）支軸部２４は、小径部２４ｄと被圧入部２４ｃとの間にテーパ部２４ｅを有しているため、プッシュナット３６をテーパ部２４ｅによって被圧入部２４ｃにスムーズに圧入させることができる。 (3) Since the support shaft part 24 has the taper part 24e between the small diameter part 24d and the press-fit part 24c, the push nut 36 can be smoothly press-fitted into the press-fit part 24c by the taper part 24e. it can.
（４）支軸部２４がギヤハウジングに一体形成されるため、部品点数を少なく抑えることができる。また、削れやすい樹脂材料よりなる支軸部２４に小径部２４ｄを設けることで、その小径部２４ｄによる削りかすを抑える効果が顕著に発揮される。 (4) Since the support shaft portion 24 is integrally formed with the gear housing, the number of parts can be reduced. Further, by providing the small-diameter portion 24d on the support shaft portion 24 made of a resin material that is easily scraped, the effect of suppressing shavings by the small-diameter portion 24d is remarkably exhibited.
なお、本発明の実施形態は、以下のように変更してもよい。
・上記実施形態では、支軸部２４は、小径部２４ｄからテーパ部２４ｅを経て被圧入部２４ｃに移行するように形成されたが、これ以外に例えば、小径部２４ｄから直角の段差を経て被圧入部２４ｃに移行するように形成してもよい。
In addition, you may change embodiment of this invention as follows.
In the above embodiment, the support shaft portion 24 is formed so as to move from the small diameter portion 24d to the press-fitted portion 24c via the taper portion 24e. You may form so that it may transfer to the press-fit part 24c.
・上記実施形態では、小径部２４ｄを第２支持部２４ｂの全周に亘って形成したが、これ以外に例えば、各係止片３６ｂに対応する箇所（組み付け時に係止片３６ｂが通る箇所）のみ小径とする構成としてもよい。 In the above embodiment, the small-diameter portion 24d is formed over the entire circumference of the second support portion 24b. However, for example, a location corresponding to each locking piece 36b (a location where the locking piece 36b passes during assembly) Only a small diameter may be adopted.
・上記実施形態では、抜け止め部材としてプッシュナット３６を用いたが、これに限定されるものではなく、例えば、一部が開放する環状の抜け止め部材（Ｃリング等）を用いてもよい。 In the above embodiment, the push nut 36 is used as the retaining member. However, the push nut 36 is not limited to this. For example, an annular retaining member (C ring or the like) that is partially opened may be used.
・上記実施形態では、出力ギヤ部３２がウォームホイール３１に一体形成されたが、これに限定されるものではなく、ウォームホイール３１と出力ギヤ部３２とを別体で構成してもよい。 In the above embodiment, the output gear portion 32 is integrally formed with the worm wheel 31, but is not limited thereto, and the worm wheel 31 and the output gear portion 32 may be configured separately.
・上記実施形態では、支軸部２４が樹脂製のギヤハウジング２０（ホイール収容部２０ｂ）に一体形成された構成としたが、これに限定されるものではなく、例えば、支軸部２４の全体又は第２支持部２４ｂのみをギヤハウジング２０に対して別体（例えば金属部品）として構成してもよい。 In the above embodiment, the support shaft portion 24 is formed integrally with the resin gear housing 20 (wheel housing portion 20b). However, the present invention is not limited to this. For example, the entire support shaft portion 24 Or you may comprise only the 2nd support part 24b as a different body (for example, metal component) with respect to the gear housing 20. FIG.
・上記実施形態では、パワーウインド装置のギヤードモータ１に具体化したが、これに限らず例えばサンルーフ装置、スライドドア開閉装置といった車両開閉体駆動装置のモータに適用してもよく、またワイパ装置等、その他の装置に用いるモータに適用してもよい。 In the above embodiment, the geared motor 1 of the power window device is embodied. However, the invention is not limited thereto, and may be applied to a motor of a vehicle opening / closing body driving device such as a sunroof device or a sliding door opening / closing device, a wiper device, etc. The present invention may be applied to motors used in other devices.
・上記実施形態において、ギヤードモータ１を構成する各部材の材料・形状・構成等は一例であり、適宜変更してもよい。 In the above embodiment, the material, shape, configuration, etc. of each member constituting the geared motor 1 is an example, and may be changed as appropriate.
１…ギヤードモータ、２…モータ部、３…減速部、１２ａ…回転軸、２０…ギヤハウジング、２１…ウォーム軸、２２…減速出力部材、２４…支軸部、２４ｃ…被圧入部、２４ｄ…小径部、２４ｅ…テーパ部、３１…ウォームホイール、３２…出力ギヤ部、３６…プッシュナット（抜け止め部材）。 DESCRIPTION OF SYMBOLS 1 ... Geared motor, 2 ... Motor part, 3 ... Deceleration part, 12a ... Rotating shaft, 20 ... Gear housing, 21 ... Worm shaft, 22 ... Deceleration output member, 24 ... Support shaft part, 24c ... Press-fit part, 24d ... Small diameter portion, 24e ... taper portion, 31 ... worm wheel, 32 ... output gear portion, 36 ... push nut (retaining member).
Claims (4)
前記減速部は、
支軸部を有するギヤハウジングと、
前記ギヤハウジング内に収容され、前記モータ部の回転軸に一体回転可能に連結されたウォーム軸と、
前記支軸部に回転可能に支持され、前記ウォーム軸と噛合して前記回転軸の回転を減速して出力する減速出力部材と、
前記支軸部に対してその先端側から組み付けられ、前記支軸部からの前記減速出力部材の抜け止めを行う環状の抜け止め部材とを備え、
前記支軸部は、前記抜け止め部材が圧入固定された被圧入部よりも先端側において該被圧入部よりも小径をなす小径部を有していることを特徴とするギヤードモータ。 A geared motor in which a motor part and a speed reduction part are assembled together,
The deceleration part is
A gear housing having a support shaft portion;
A worm shaft housed in the gear housing and connected to the rotation shaft of the motor unit so as to be integrally rotatable;
A deceleration output member that is rotatably supported by the support shaft portion, meshes with the worm shaft, and decelerates and outputs the rotation of the rotation shaft;
An annular retaining member assembled from the distal end side with respect to the support shaft portion and preventing the deceleration output member from coming off from the support shaft portion;
The geared motor is characterized in that the support shaft portion has a small-diameter portion having a smaller diameter than the press-fit portion on the tip side of the press-fit portion to which the retaining member is press-fitted and fixed.
前記小径部は、前記支軸部における前記被圧入部よりも先端側の部位の全体に亘って形成されていることを特徴とするギヤードモータ。 The geared motor according to claim 1, wherein
The geared motor is characterized in that the small-diameter portion is formed over the entire portion of the support shaft portion on the tip side of the pressed-in portion.
前記支軸部は、前記小径部と前記被圧入部との間にテーパ部を有していることを特徴とするギヤードモータ。 The geared motor according to claim 1 or 2,
The geared motor, wherein the support shaft portion has a taper portion between the small diameter portion and the press-fit portion.
前記支軸部は、前記ギヤハウジングに一体形成された樹脂材料よりなることを特徴とするギヤードモータ。 In the geared motor of any one of Claims 1-3,
The geared motor, wherein the support shaft portion is made of a resin material integrally formed with the gear housing.
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| US9657508B2 (en) | 2015-03-11 | 2017-05-23 | Asmo Co., Ltd. | Geared motor and power window device |
| CN109854713A (en) * | 2017-11-30 | 2019-06-07 | 日本电产株式会社 | Gear unit, gear-box, gear motor and the electric product comprising gear motor |
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| JP2010038282A (en) * | 2008-08-06 | 2010-02-18 | Tatsuya Urayama | Locking tool and binding tool |
| JP2012080775A (en) * | 2012-01-26 | 2012-04-19 | Mitsuba Corp | Motor with speed reduction mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010038282A (en) * | 2008-08-06 | 2010-02-18 | Tatsuya Urayama | Locking tool and binding tool |
| JP2012080775A (en) * | 2012-01-26 | 2012-04-19 | Mitsuba Corp | Motor with speed reduction mechanism |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9657508B2 (en) | 2015-03-11 | 2017-05-23 | Asmo Co., Ltd. | Geared motor and power window device |
| CN109854713A (en) * | 2017-11-30 | 2019-06-07 | 日本电产株式会社 | Gear unit, gear-box, gear motor and the electric product comprising gear motor |
| CN109854713B (en) * | 2017-11-30 | 2022-06-10 | 日本电产株式会社 | Gear unit, gear box, gear motor and electric product comprising gear motor |
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