JP2021078170A

JP2021078170A - Geared motor

Info

Publication number: JP2021078170A
Application number: JP2019200563A
Authority: JP
Inventors: 赤羽　徳行; Noriyuki Akaha; 徳行赤羽
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Instruments Corp
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2021-05-20

Abstract

To provide a noise-reduced geared motor.SOLUTION: A geared motor 1 comprises: a DC brushless motor 2 as a driving source; a gear transmission mechanism 3 for transmitting the rotation of the DC brushless motor 2 to an output member 4; and a case 5 in which at least part of the output member 4, the DC brushless motor 2, and the gear transmission mechanism 3 are accommodated. The DC brushless motor 2 can reduce noise more than a brushed motor. A worm gear 29 is mounted on a motor shaft 25. A first helical gear 31 is used in the gear transmission mechanism 3 to engage with the worm gear 29. A vibration-proof rubber 6 is arranged between the body part 20 of the DC brushless motor 2 and the case 5. All of the multiple gears used in the gear transmission mechanism 3 are helical gears. The first helical gear 31 is made from a flexible material.SELECTED DRAWING: Figure 3

Description

本発明は、ギアードモータに関するものである。 The present invention relates to a geared motor.

ギアードモータは、モータの回転を出力部材に伝達する歯車伝達機構を有しており、歯車伝達機構は、モータの回転を減速して出力部材に伝達する。ここで、モータの出力軸にウォームギアを設ける一方、歯車伝達機構において、ウォームギアと噛み合う歯車を斜歯歯車とした構成が提案されている（特許文献１参照）。特許文献１に記載のギアードモータでは、モータおよび歯車伝達機構がケースに収容されており、モータおよび歯車伝達機構はケースによって支持されている。また、特許文献１に記載のギアードモータでは、歯車伝達機構に用いた複数の歯車のうち、ウォームギアと噛み合う歯車以外は全て、平歯車である。 The geared motor has a gear transmission mechanism that transmits the rotation of the motor to the output member, and the gear transmission mechanism decelerates the rotation of the motor and transmits the rotation to the output member. Here, while a worm gear is provided on the output shaft of the motor, a configuration has been proposed in which the gear that meshes with the worm gear is an oblique gear in the gear transmission mechanism (see Patent Document 1). In the geared motor described in Patent Document 1, the motor and the gear transmission mechanism are housed in a case, and the motor and the gear transmission mechanism are supported by the case. Further, in the geared motor described in Patent Document 1, among the plurality of gears used in the gear transmission mechanism, all gears other than the gears that mesh with the worm gear are spur gears.

特開２００６−１４９１０１号公報Japanese Unexamined Patent Publication No. 2006-149101

ギアードモータを用いた各種機器において、ギアードモータが発生する音を低減させることが望まれている場合がある。かかる要求に関し、特許文献１に記載のギアードモータでは、ウォームギアと斜歯歯車とを用いているため、歯車の噛み合い音を低減させることができるが、モータ自身を原因とする振動音等には対策が施されていない。このため、ギアードモータには、さらなる静音化が望まれている。 In various devices using a geared motor, it may be desired to reduce the noise generated by the geared motor. Regarding this requirement, since the geared motor described in Patent Document 1 uses a worm gear and an oblique tooth gear, it is possible to reduce the meshing noise of the gears, but it is possible to take measures against vibration noise caused by the motor itself. Is not applied. Therefore, further noise reduction is desired for the geared motor.

以上の問題点に鑑みて、本発明の課題は、静音化を図ったギアードモータを提供することにある。 In view of the above problems, an object of the present invention is to provide a geared motor with reduced noise.

上記課題を解決するため、本発明に係るギアードモータは、出力部材と、ＤＣブラシレスモータと、前記ＤＣブラシレスモータのモータ軸に設けられたウォームギアと、前記ウォームギアと噛み合う斜歯歯車を含む複数の歯車を備え、前記ＤＣブラシレスモータの回転を前記出力部材に伝達する歯車伝達機構と、前記出力部材の少なくとも一部、前記ＤＣブラシレスモータ、および前記歯車伝達機構を内側に収容するケースと、前記ＤＣブラシレスモータの胴部と前記ケースとの間に挟まれた防振ゴムと、を有することを特徴とする。 In order to solve the above problems, the geared motor according to the present invention includes a plurality of gears including an output member, a DC brushless motor, a worm gear provided on the motor shaft of the DC brushless motor, and an oblique tooth gear that meshes with the worm gear. A gear transmission mechanism for transmitting the rotation of the DC brushless motor to the output member, a case for accommodating at least a part of the output member, the DC brushless motor, and the gear transmission mechanism inside, and the DC brushless. It is characterized by having an anti-vibration rubber sandwiched between the body of the motor and the case.

本発明では、駆動源としてＤＣブラシレスモータが用いられているため、ブラシ付きモータを用いた場合より静音化を図ることができる。また、ＤＣブラシレスモータの胴部とケースとの間に防振ゴムが設けられているため、ＤＣブラシレスモータの振動がケースに伝達されにくい。さらに、モータ軸にはウォームギアが設けられ、歯車伝達機構には、ウォームギアと噛み合う斜歯歯車が用いられているため、歯車同士の噛み合いノイズを低減することができる。それ故、ギアードモータの静音化を図ることができる。 In the present invention, since a DC brushless motor is used as a drive source, noise can be reduced as compared with the case of using a brushed motor. Further, since the vibration-proof rubber is provided between the body of the DC brushless motor and the case, it is difficult for the vibration of the DC brushless motor to be transmitted to the case. Further, since a worm gear is provided on the motor shaft and an oblique tooth gear that meshes with the worm gear is used for the gear transmission mechanism, meshing noise between the gears can be reduced. Therefore, it is possible to reduce the noise of the geared motor.

本発明において、前記複数の歯車の全てが斜歯歯車である態様を採用することができる。かかる態様によれば、歯車伝達機構の全体において、歯車同士の噛み合いノイズを低減することができる。 In the present invention, it is possible to adopt an embodiment in which all of the plurality of gears are oblique tooth gears. According to this aspect, the meshing noise between the gears can be reduced in the entire gear transmission mechanism.

本発明において、前記歯車伝達機構において前記ウォームギアと噛み合う斜歯歯車は、可撓性材料からなる態様を採用することができる。かかる態様によれば、最も回転速度が高い歯車間における噛み合いノイズを低減することができる。 In the present invention, the oblique tooth gear that meshes with the worm gear in the gear transmission mechanism can adopt an aspect made of a flexible material. According to this aspect, meshing noise between gears having the highest rotation speed can be reduced.

本発明において、前記胴部の前記モータ軸が設けられている出力側の端面、および前記胴部の前記出力側の端面とは反対側の反出力側の端面のうちの少なく一方の端面は、ゴム製のＯリングが装着された凸部を備え、前記凸部は、前記Ｏリングを介して前記ケースに支持されている態様を採用することができる。かかる態様によれば、ＤＣブラシレスモータの振動がケースに伝達されることを抑制することができる。 In the present invention, at least one end face of the output side end surface of the body portion on which the motor shaft is provided and the end surface of the body portion on the opposite output side opposite to the output side end surface are. A mode in which a convex portion to which a rubber O-ring is attached is provided, and the convex portion is supported by the case via the O-ring can be adopted. According to this aspect, it is possible to suppress the vibration of the DC brushless motor from being transmitted to the case.

本発明において、前記ケースは、前記複数の歯車の各々を囲むように延在する円弧状の壁部を備えている態様を採用することができる、かかる態様によれば、ケース内での動作音の反響を抑制することができる。 In the present invention, it is possible to adopt an embodiment in which the case includes an arc-shaped wall portion extending so as to surround each of the plurality of gears. According to such an embodiment, an operating sound in the case Reverberation can be suppressed.

本発明において、前記ケースは、前記胴部に対して前記胴部の軸線方向に対して直交する方向の一方側から重なる第１ケース部材と、前記胴部に前記第１ケース部材とは反対側から重なる第２ケース部材と、を備え、前記防振ゴムは、前記胴部と第１ケース部材との間、および前記胴部と前記第２ケース部材との間の各々に挟まれている態様を採用することができる。かかる態様によれば、ＤＣブラシレスモータの振動が第１ケース部材、および第２ケース部材の各々に伝達されることを抑制することができる。 In the present invention, the case includes a first case member that overlaps the body portion from one side in a direction orthogonal to the axial direction of the body portion, and the body portion on the side opposite to the first case member. The anti-vibration rubber is sandwiched between the body portion and the first case member, and between the body portion and the second case member, respectively. Can be adopted. According to this aspect, it is possible to suppress the vibration of the DC brushless motor from being transmitted to each of the first case member and the second case member.

本発明において、前記防振ゴムは、前記胴部の外周面のうち、前記第１ケース部材側の面に貼付された第１防振ゴムと、前記第２ケース部材側の面に貼付された第２防振ゴムと、を含む態様を採用することができる。かかる態様によれば、ＤＣブラシレスモータの胴部に筒状の防振ゴムを嵌める態様より、防振ゴムを設けるのが容易である。 In the present invention, the anti-vibration rubber is attached to the first anti-vibration rubber attached to the surface of the first case member side and the surface of the second case member side of the outer peripheral surface of the body portion. A mode including the second anti-vibration rubber can be adopted. According to this aspect, it is easier to provide the anti-vibration rubber than the embodiment in which the tubular anti-vibration rubber is fitted to the body of the DC brushless motor.

本発明において、前記第１ケースの側板部の先端部、および前記第２ケースの側板部の先端部のうちの一方の先端部は、他方の先端部の側に向いた第１段部を内側に構成する第１薄板部を備え、前記他方の先端部は、前記一方の先端部の側に向いた第２段部を外側に構成する第２薄板部を備え、前記第１薄板部が前記第２薄板部に隙間を介して外側から重なった状態で、前記第１薄板部が前記第２段部に当接し、前記第２薄板部が前記第１段部に当接している態様を採用することができる、かかる態様によれば、ケースの内部に異物が侵入しにくい。また、第１薄板部と第２薄板部とが隙間を介して重なっているため、第１薄板部と第２薄板部とが接触と離間とを繰り返すことに起因するビビリ音が発生しにくい。 In the present invention, the tip of the side plate of the first case and one of the tips of the side plate of the second case are inside the first step facing the other tip. The other tip portion is provided with a second thin plate portion constituting the second step portion facing the side of the one tip portion on the outside, and the first thin plate portion is the said. A mode is adopted in which the first thin plate portion is in contact with the second step portion and the second thin plate portion is in contact with the first step portion in a state where the second thin plate portion is overlapped with the second thin plate portion from the outside through a gap. According to such an embodiment, it is difficult for foreign matter to enter the inside of the case. Further, since the first thin plate portion and the second thin plate portion overlap each other through a gap, chattering noise due to repeated contact and separation between the first thin plate portion and the second thin plate portion is unlikely to occur.

本発明において、前記出力部材を複数備え、前記歯車伝達機構は、前記複数の出力部材の各々に前記ウォームギアの回転を伝達する態様を採用することができる。 In the present invention, a mode in which a plurality of the output members are provided and the gear transmission mechanism transmits the rotation of the worm gear to each of the plurality of output members can be adopted.

本発明の実施形態１に係るギアードモータの斜視図。The perspective view of the geared motor which concerns on Embodiment 1 of this invention. 図１に示すギアードモータの分解斜視図。An exploded perspective view of the geared motor shown in FIG. 図２に示す歯車伝達機構等を第２ケース部材の側からみた斜視図。A perspective view of the gear transmission mechanism and the like shown in FIG. 2 as viewed from the side of the second case member. 図２に示す歯車伝達機構等を第１ケース部材の側からみた斜視図。A perspective view of the gear transmission mechanism and the like shown in FIG. 2 as viewed from the side of the first case member. 図２に示すＤＣブラシレスモータの出力側の端面等を示す説明図。Explanatory drawing which shows the end face and the like on the output side of the DC brushless motor shown in FIG. 図２に示すＤＣブラシレスモータの反出力側の端面等を示す説明図。Explanatory drawing which shows the end face of the DC brushless motor shown in FIG. 2 on the non-output side, and the like. 図２に示す第１ケース部材の側板部と第２ケース部材の側板部と重なり部分の断面図。FIG. 2 is a cross-sectional view of a portion overlapping the side plate portion of the first case member and the side plate portion of the second case member shown in FIG. 本発明の実施形態２に係るギアードモータの斜視図。The perspective view of the geared motor which concerns on Embodiment 2 of this invention. 図８に示すギアードモータの分解斜視図。An exploded perspective view of the geared motor shown in FIG. 図９に示す歯車伝達機構等を第２ケース部材の側からみた斜視図。A perspective view of the gear transmission mechanism and the like shown in FIG. 9 as viewed from the side of the second case member. 本発明の実施形態３に係るギアードモータの斜視図。The perspective view of the geared motor which concerns on Embodiment 3 of this invention. 図１１に示すギアードモータの分解斜視図。An exploded perspective view of the geared motor shown in FIG. 図１２に示す歯車伝達機構等を第２ケース部材の側からみた斜視図。A perspective view of the gear transmission mechanism and the like shown in FIG. 12 as viewed from the side of the second case member.

図面を参照しながら、本発明の実施形態について説明する。本明細書において、互いに直交する３方向をＸ軸方向、Ｙ軸方向、およびＺ軸方向として説明する。ここで、Ｚ軸方向は、出力部材４の回転中心軸線に沿う方向である。Ｘ軸方向は、モータ軸２５の軸線に沿う方向である。また、Ｘ軸方向の一方側にＸ１を付し、Ｘ軸方向の他方側にＸ２を付し、Ｙ軸方向の一方側にＹ１を付し、Ｙ軸方向の他方側にＹ２を付し、Ｚ軸方向の一方側にＺ１を付し、Ｚ軸方向の他方側にＺ２を付して説明する。 An embodiment of the present invention will be described with reference to the drawings. In the present specification, the three directions orthogonal to each other will be described as the X-axis direction, the Y-axis direction, and the Z-axis direction. Here, the Z-axis direction is a direction along the rotation center axis of the output member 4. The X-axis direction is a direction along the axis of the motor shaft 25. Further, X1 is attached to one side in the X-axis direction, X2 is attached to the other side in the X-axis direction, Y1 is attached to one side in the Y-axis direction, and Y2 is attached to the other side in the Y-axis direction. Z1 will be attached to one side in the Z-axis direction, and Z2 will be attached to the other side in the Z-axis direction.

［実施形態１］
（全体構成）
図１は、本発明の実施形態１に係るギアードモータ１の斜視図である。図２は、図１に示すギアードモータ１の分解斜視図である。図３は、図２に示す歯車伝達機構３等を第２ケース部材５２の側からみた斜視図である。図４は、図２に示す歯車伝達機構３等を第１ケース部材５１の側からみた斜視図である。 [Embodiment 1]
(overall structure)
FIG. 1 is a perspective view of the geared motor 1 according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view of the geared motor 1 shown in FIG. FIG. 3 is a perspective view of the gear transmission mechanism 3 and the like shown in FIG. 2 as viewed from the side of the second case member 52. FIG. 4 is a perspective view of the gear transmission mechanism 3 and the like shown in FIG. 2 as viewed from the side of the first case member 51.

図１、図２、図３、および図４に示すギアードモータ１は、出力部材４と、駆動源としてのＤＣブラシレスモータ２と、ＤＣブラシレスモータ２の回転を出力部材４に伝達する歯車伝達機構３と、出力部材４の少なくとも一部、ＤＣブラシレスモータ２、および歯車伝達機構３を内側に収容するケース５とを有している。従って、ＤＣブラシレスモータ２を作動させると、ＤＣブラシレスモータ２の回転は、歯車伝達機構３を介して出力部材４に伝達されるので、出力部材４からＤＣブラシレスモータ２の回転を出力することができる。本形態において、ＤＣブラシレスモータ２のモータ軸線はＸ軸方向に沿って延在し、出力部材４、および歯車伝達機構３の複数の歯車の回転中心軸線はＺ軸方向に沿って延在している。 The geared motor 1 shown in FIGS. 1, 2, 3 and 4 has an output member 4, a DC brushless motor 2 as a drive source, and a gear transmission mechanism that transmits the rotation of the DC brushless motor 2 to the output member 4. It has a case 5 that houses at least a part of the output member 4, a DC brushless motor 2, and a gear transmission mechanism 3 inside. Therefore, when the DC brushless motor 2 is operated, the rotation of the DC brushless motor 2 is transmitted to the output member 4 via the gear transmission mechanism 3, so that the rotation of the DC brushless motor 2 can be output from the output member 4. it can. In this embodiment, the motor axis of the DC brushless motor 2 extends along the X-axis direction, and the rotation center axes of the output member 4 and the plurality of gears of the gear transmission mechanism 3 extend along the Z-axis direction. There is.

出力部材４は、ケース５の内側で歯車伝達機構３から回転が伝達される歯車部４１と、歯車部４１からＺ軸方向の他方側Ｚ２に向けて突出した第１軸部４２とを有しており、第１軸部４２のうち、連結用の平面部４２０が形成されている部分は、ケース５からＺ軸方向の他方側Ｚ２に向けて突出している。出力部材４は、歯車部４１よりＺ軸方向の一方側Ｚ１に突出した第２軸部４３を有している。従って、後述するように、第１軸部４２、および第２軸部４３は各々、ケース５の円筒部の内側（軸穴）によって回転可能に支持される。 The output member 4 has a gear portion 41 to which rotation is transmitted from the gear transmission mechanism 3 inside the case 5, and a first shaft portion 42 protruding from the gear portion 41 toward the other side Z2 in the Z-axis direction. The portion of the first shaft portion 42 on which the flat surface portion 420 for connection is formed protrudes from the case 5 toward the other side Z2 in the Z-axis direction. The output member 4 has a second shaft portion 43 protruding from the gear portion 41 on one side Z1 in the Z-axis direction. Therefore, as will be described later, the first shaft portion 42 and the second shaft portion 43 are each rotatably supported by the inside (shaft hole) of the cylindrical portion of the case 5.

（ＤＣブラシレスモータ２および歯車伝達機構３の構成）
図５は、図２に示すＤＣブラシレスモータ２の出力側の端面２１等を示す説明図である。 (Structure of DC brushless motor 2 and gear transmission mechanism 3)
FIG. 5 is an explanatory view showing an end face 21 and the like on the output side of the DC brushless motor 2 shown in FIG.

図２、図３、図４、および図５に示すように、ＤＣブラシレスモータ２は、Ｘ軸方向に沿う方向に軸線方向を向けた胴部２０と、胴部２０からＸ軸方向の一方側Ｘ１に向けて突出したモータ軸２５とを有しており、モータ軸２５にはウォームギア２９が設けられている。本形態においては、外周面にウォームギア２９が形成された筒状部材２８がモータ軸２５に固定されている。 As shown in FIGS. 2, 3, 4, and 5, the DC brushless motor 2 has a body portion 20 whose axial direction is oriented along the X-axis direction and one side of the body portion 20 to the X-axis direction. It has a motor shaft 25 protruding toward X1, and the motor shaft 25 is provided with a worm gear 29. In this embodiment, the tubular member 28 having the worm gear 29 formed on the outer peripheral surface is fixed to the motor shaft 25.

歯車伝達機構３は、ウォームギア２９と噛み合う第１斜歯歯車３１を含む複数の歯車を備えている。本形態において、歯車伝達機構３は、複数の歯車として２つの歯車を備えており、複数の歯車はいずれも斜歯歯車である。従って、歯車伝達機構３は、ウォームギア２９と噛み合う第１斜歯歯車３１と、第１斜歯歯車３１と噛み合う第２斜歯歯車３２とを備えている。従って、出力部材４の歯車部４１も斜歯歯車からなり、歯車部４１（斜歯歯車）は第２斜歯歯車３２と噛み合っている。 The gear transmission mechanism 3 includes a plurality of gears including a first oblique tooth gear 31 that meshes with the worm gear 29. In the present embodiment, the gear transmission mechanism 3 includes two gears as a plurality of gears, and the plurality of gears are all oblique tooth gears. Therefore, the gear transmission mechanism 3 includes a first oblique tooth gear 31 that meshes with the worm gear 29, and a second oblique tooth gear 32 that meshes with the first oblique tooth gear 31. Therefore, the gear portion 41 of the output member 4 is also composed of an oblique tooth gear, and the gear portion 41 (oblique tooth gear) meshes with the second oblique tooth gear 32.

第１斜歯歯車３１は、ウォームギア２９と噛み合う斜歯部３１１と、斜歯部３１１より小径の斜歯部３１２とが同軸状に設けられた複合歯車である。第２斜歯歯車３２は、第１斜歯歯車３１の斜歯部３１２と噛み合う斜歯部３２１と、斜歯部３２１より小径の斜歯部３２２とが同軸状に設けられた複合歯車であり、斜歯部３２２が出力部材４の歯車部４１と噛み合っている。第１斜歯歯車３１は、ゴムあるいは可撓性の樹脂等の可撓性材料からなる。例えば、第１斜歯歯車３１は、ウレタンゴムからなる。 The first oblique tooth gear 31 is a composite gear in which an oblique tooth portion 311 that meshes with the worm gear 29 and an oblique tooth portion 312 having a diameter smaller than that of the oblique tooth portion 311 are coaxially provided. The second oblique tooth gear 32 is a composite gear in which an oblique tooth portion 321 that meshes with the oblique tooth portion 312 of the first oblique tooth gear 31 and an oblique tooth portion 322 having a diameter smaller than that of the oblique tooth portion 321 are provided coaxially. , The oblique tooth portion 322 meshes with the gear portion 41 of the output member 4. The first oblique gear 31 is made of a flexible material such as rubber or a flexible resin. For example, the first oblique tooth gear 31 is made of urethane rubber.

本形態において、第１斜歯歯車３１および第２斜歯歯車３２は各々、固定軸である支軸３１０、３２０によって回転可能に支持されている。後述するように、支軸３１０、３２０の両端部は、ケース５に保持されている。 In the present embodiment, the first oblique gear 31 and the second oblique gear 32 are rotatably supported by the support shafts 310 and 320, which are fixed shafts, respectively. As will be described later, both ends of the support shafts 310 and 320 are held in the case 5.

（第１ケース部材５１の構成）
図２、図３、および図４において、ケース５は、略四角形の平面形状を有している。ケース５は、ＤＣブラシレスモータ２等にＺ軸方向の一方側Ｚ１から重なる第１ケース部材５１と、ＤＣブラシレスモータ２等にＺ軸方向の他方側Ｚ２から重なる第２ケース部材５２と、第１ケース部材５１と第２ケース部材５２とを締結するボルト５５とを有している。 (Structure of First Case Member 51)
In FIGS. 2, 3, and 4, the case 5 has a substantially quadrangular planar shape. The case 5 includes a first case member 51 that overlaps the DC brushless motor 2 and the like from one side Z1 in the Z-axis direction, and a second case member 52 that overlaps the DC brushless motor 2 and the like from the other side Z2 in the Z-axis direction. It has a bolt 55 for fastening the case member 51 and the second case member 52.

図３に示すように、第１ケース部材５１は、ＤＣブラシレスモータ２、歯車伝達機構３、および出力部材４をＺ軸方向の一方側Ｚ１から支持する端板部５１１と、端板部５１１の外縁からＺ軸方向の他方側Ｚ２に向けて突出した側板部５１２とを有している。端板部５１１は、ＤＣブラシレスモータ２の胴部２０が配置される部分がＺ軸方向の一方側Ｚ１に向けて、概ね断面半円形状に凹んだ凹部５１３ｓになっており、端板部５１１のＺ軸方向の一方側Ｚ１の面には、凹部５１３ｓの形状が反映された突出部５１３ｔが形成されている。凹部５１３ｓの内面では、周方向に延在する複数本のリブ５１３ａが並列するように形成されている。 As shown in FIG. 3, the first case member 51 includes an end plate portion 511 and an end plate portion 511 that support the DC brushless motor 2, the gear transmission mechanism 3, and the output member 4 from one side Z1 in the Z-axis direction. It has a side plate portion 512 protruding from the outer edge toward the other side Z2 in the Z-axis direction. The end plate portion 511 has a recess 513s in which the portion of the DC brushless motor 2 in which the body portion 20 is arranged is recessed in a semicircular cross section toward one side Z1 in the Z-axis direction, and the end plate portion 511. On the surface of Z1 on one side in the Z-axis direction, a protruding portion 513t is formed in which the shape of the recess 513s is reflected. On the inner surface of the recess 513s, a plurality of ribs 513a extending in the circumferential direction are formed so as to be parallel to each other.

凹部５１３ｓのＸ軸方向の両側には、ＤＣブラシレスモータ２を支持するための板状の支持部５１４、５１５が形成されている。支持部５１４、５１５のうち、支持部５１４は、端板部５１１のＸ軸方向の途中位置に設けられ、支持部５１５は、側板部５１２の一部からなる。支持部５１４、５１５には、半円形状の凹部５１６ａが形成されている。また、支持部５１４、５１５の互いに対向する面には、凹部５１６ａの円弧状の縁に沿う部分が円弧状の肉薄部５１６ｂになっており、肉薄部５１６ｂによって円弧状の段部５１６ｃが形成されている。 Plate-shaped support portions 514 and 515 for supporting the DC brushless motor 2 are formed on both sides of the recess 513s in the X-axis direction. Of the support portions 514 and 515, the support portion 514 is provided at an intermediate position of the end plate portion 511 in the X-axis direction, and the support portion 515 is composed of a part of the side plate portion 512. A semicircular recess 516a is formed in the support portions 514 and 515. Further, on the surfaces of the support portions 514 and 515 facing each other, a portion along the arcuate edge of the recess 516a is an arc-shaped thin portion 516b, and the thin portion 516b forms an arc-shaped step portion 516c. ing.

端板部５１１には、支軸３１０、３２０のＺ軸方向の一方側Ｚ１の端部を各々、内側に
保持する有底の円筒部５１７ａ、５１７ｂと、出力部材４の第２軸部４３を回転可能に支持する有底の円筒部５１７ｃが形成されている。端板部５１１において、第１斜歯歯車３１および第２斜歯歯車３２のＺ軸方向の一方側Ｚ１に位置する斜歯部３１２、３２１と重なる部分は、Ｚ軸方向の一方側Ｚ１に凹んだ凹部５１９になっている。従って、円筒部５１７ａ、５１７ｂは、凹部５１９の底部に形成されている。また、凹部５１９の側壁は、斜歯部３１２、３２１を囲むように円弧状に延在する壁部５１９ａ、５１９ｂになっている。本形態において、壁部５１９ａ、５１９ｂは繋がっている。かかる形状に対応して、端板部５１１のＺ軸方向の一方側Ｚ１の面には、円筒部５１７ａ、５１７ｂ、５１７ｃ、および凹部５１９が反映された突出部５１７ｓ、５１７ｔ、５１７ｕ、５１９ｔが形成されている。 The end plate portion 511 includes bottomed cylindrical portions 517a and 517b for holding the ends of Z1 on one side of the support shafts 310 and 320 in the Z-axis direction, respectively, and the second shaft portion 43 of the output member 4. A bottomed cylindrical portion 517c that rotatably supports is formed. In the end plate portion 511, the portion of the first oblique tooth gear 31 and the second oblique tooth gear 32 that overlaps with the oblique tooth portions 312 and 321 located on one side Z1 in the Z-axis direction is recessed in one side Z1 in the Z-axis direction. It is a recess 519. Therefore, the cylindrical portions 517a and 517b are formed at the bottom of the recess 519. Further, the side wall of the recess 519 is a wall portion 519a, 519b extending in an arc shape so as to surround the oblique tooth portions 312 and 321. In this embodiment, the wall portions 519a and 519b are connected. Corresponding to such a shape, a cylindrical portion 517a, 517b, 517c, and a protruding portion 517s, 517t, 517u, 319t reflecting the recess 519 are formed on the surface of the end plate portion 511 on one side Z1 in the Z-axis direction. Has been done.

（第２ケース部材５２の構成）
図４に示すように、第２ケース部材５２は、ＤＣブラシレスモータ２、歯車伝達機構３、および出力部材４をＺ軸方向の他方側Ｚ２から支持する端板部５２１と、端板部５２１の外縁からＺ軸方向の一方側Ｚ１に向けて突出した側板部５２２とを有している。端板部５２１は、ＤＣブラシレスモータ２の胴部２０が配置される部分がＺ軸方向の他方側Ｚ１に向けて、概ね断面半円形状に凹んだ凹部５２３ｓになっており、端板部５２１のＺ軸方向の他方側Ｚ２の面には、凹部５２３ｓの形状が反映された突出部５２３ｔが形成されている。凹部５２３ｓの内面では、周方向に延在する複数本のリブ５２３ａが並列するように形成されている。 (Structure of Second Case Member 52)
As shown in FIG. 4, the second case member 52 includes an end plate portion 521 and an end plate portion 521 that support the DC brushless motor 2, the gear transmission mechanism 3, and the output member 4 from the other side Z2 in the Z-axis direction. It has a side plate portion 522 protruding from the outer edge toward one side Z1 in the Z-axis direction. The end plate portion 521 has a recess 523s in which the portion of the DC brushless motor 2 in which the body portion 20 is arranged is recessed in a semicircular cross section toward the other side Z1 in the Z-axis direction. On the surface of Z2 on the other side in the Z-axis direction, a protruding portion 523t that reflects the shape of the recess 523s is formed. On the inner surface of the recess 523s, a plurality of ribs 523a extending in the circumferential direction are formed so as to be parallel to each other.

凹部５２３ｓのＸ軸方向の両側には、ＤＣブラシレスモータ２を支持するための板状の支持部５２４、５２５が形成されている。支持部５２４、５２５のうち、支持部５２４は、端板部５２１のＸ軸方向の途中位置に設けられ、支持部５２５は、側板部５２２の一部からなる。支持部５２４、５２５には、半円形状の凹部５２６ａが形成されている。また、支持部５２４、５２５の互いに対向する面には、凹部５２６ａの円弧状の縁に沿う部分が円弧状の肉薄部５２６ｂになっており、肉薄部５２６ｂによって円弧状の段部５２６ｃが形成されている。 Plate-shaped support portions 524 and 525 for supporting the DC brushless motor 2 are formed on both sides of the recess 523s in the X-axis direction. Of the support portions 524 and 525, the support portion 524 is provided at an intermediate position of the end plate portion 521 in the X-axis direction, and the support portion 525 is composed of a part of the side plate portion 522. A semicircular recess 526a is formed in the support portions 524 and 525. Further, on the surfaces of the support portions 524 and 525 facing each other, a portion along the arcuate edge of the recess 526a is an arc-shaped thin portion 526b, and the thin portion 526b forms an arc-shaped step portion 526c. ing.

端板部５２１には、支軸３１０、３２０のＺ軸方向の他方側Ｚ２の端部を各々、内側に保持する有底の円筒部５２７ａ、５２７ｂと、出力部材４の第１軸部４２を回転可能に支持する貫通穴を備えた円筒部５２７ｃが形成されている。 The end plate portion 521 includes a bottomed cylindrical portion 527a and 527b that hold the ends of the Z2 on the other side of the support shafts 310 and 320 in the Z-axis direction inward, and a first shaft portion 42 of the output member 4. A cylindrical portion 527c with a rotatably supporting through hole is formed.

このように構成したケース５において、ＤＣブラシレスモータ２の胴部２０は、第１ケース部材５１の凹部５１３ｓの内面と、第２ケース部材５２の凹部５１３ｓの内面との間に挟まれた状態で保持される。 In the case 5 configured in this way, the body 20 of the DC brushless motor 2 is sandwiched between the inner surface of the recess 513s of the first case member 51 and the inner surface of the recess 513s of the second case member 52. Be retained.

（防振ゴム６およびＯリング７の構成）
図６は、図２に示すＤＣブラシレスモータ２の反出力側の端面２３等を示す説明図である。 (Structure of anti-vibration rubber 6 and O-ring 7)
FIG. 6 is an explanatory view showing an end face 23 and the like on the opposite output side of the DC brushless motor 2 shown in FIG.

図２、図３および図４に示すように、ＤＣブラシレスモータ２の胴部２０とケース５との間には、ブチルゴム等の防振ゴム６が挟まれている。ケース５は、胴部２０に対して胴部２０の軸線方向（Ｘ軸方向）に対して直交するＺ軸方向の一方側Ｚ１から重なる第１ケース部材５１と、胴部２０に第１ケース部材５１とは反対側から重なる第２ケース部材５２とを備えていることから、防振ゴム６は、胴部２０と第１ケース部材５１の凹部５１３ｓの底部との間、および胴部２０と第２ケース部材５２の凹部５１３ｓの底部との間の各々に挟まれている。より具体的には、防振ゴム６は、胴部２０の外周面のうち、第１ケース部材５１側の面に貼付された第１防振ゴム６１と、第２ケース部材５２側の面に貼付された第２防振ゴム６２とを含む。 As shown in FIGS. 2, 3 and 4, a vibration-proof rubber 6 such as butyl rubber is sandwiched between the body 20 of the DC brushless motor 2 and the case 5. The case 5 includes a first case member 51 that overlaps from one side Z1 in the Z-axis direction that is orthogonal to the axial direction (X-axis direction) of the body 20 with respect to the body 20, and a first case member that overlaps the body 20. Since the second case member 52 that overlaps from the side opposite to the 51 is provided, the anti-vibration rubber 6 is provided between the body portion 20 and the bottom portion of the recess 513s of the first case member 51, and the body portion 20 and the first. It is sandwiched between each of the two case members 52 and the bottom of the recess 513s. More specifically, the anti-vibration rubber 6 is attached to the first anti-vibration rubber 61 attached to the surface on the first case member 51 side and the surface on the second case member 52 side of the outer peripheral surface of the body portion 20. Includes the attached second anti-vibration rubber 62.

ＤＣブラシレスモータ２において、胴部２０のモータ軸２５が設けられている出力側（Ｘ軸方向の一方側Ｘ１）の端面２１、および胴部２０の出力側の端面とは反対側の反出力側（Ｘ軸方向の他方側Ｘ２の端面２３）のうちの少なく一方の端面は、ゴム製のＯリング７が装着された凸部２６を備えており、凸部２６は、Ｏリング７を介してケース５に支持されている。 In the DC brushless motor 2, the end surface 21 on the output side (one side X1 in the X-axis direction) where the motor shaft 25 of the body portion 20 is provided, and the opposite output side opposite to the output side end surface of the body portion 20. At least one end face of (the end face 23 of the other side X2 in the X-axis direction) is provided with a convex portion 26 to which a rubber O-ring 7 is mounted, and the convex portion 26 is provided via the O-ring 7. It is supported by case 5.

図２、図３、図４および図５に示すように、本形態においては、凸部２６として、胴部２０の主力側の端面２１には出力側の軸受からなる円形の凸部２６１が形成されており、凸部２６１の周りには、ゴム製のＯリング７としての第１Ｏリング７１が装着されている。第１Ｏリング７１は、第１ケース部材５１の支持部５１４に形成された段部５１６ｃと第２ケース部材５２の支持部５２４に形成された段部５２６ｃとの間で保持されている。従って、凸部２６１は、第１Ｏリング７１を介して第１ケース部材５１の支持部５１４と第２ケース部材５２の支持部５２４とに支持されている。 As shown in FIGS. 2, 3, 4 and 5, in this embodiment, as the convex portion 26, a circular convex portion 261 made of an output side bearing is formed on the end surface 21 on the main force side of the body portion 20. A first O-ring 71 as a rubber O-ring 7 is mounted around the convex portion 261. The first O-ring 71 is held between the step portion 516c formed on the support portion 514 of the first case member 51 and the step portion 526c formed on the support portion 524 of the second case member 52. Therefore, the convex portion 261 is supported by the support portion 514 of the first case member 51 and the support portion 524 of the second case member 52 via the first O-ring 71.

図２、図３、図４および図６に示すように、本形態においては、凸部２６として、さらに、胴部２０の反出力側の端面２３には反出力側の軸受からなる円形の凸部２６２が形成されており、凸部２６２の周りには、ゴム製のＯリング７としての第２Ｏリング７２が装着されている。第２Ｏリング７２は、第１ケース部材５１の支持部５１５に形成された段部５１６ｃと第２ケース部材５２の支持部５２５に形成された段部５２６ｃとの間で保持されている。従って、凸部２６２は、第２Ｏリング７２を介して第１ケース部材５１の支持部５１５と第２ケース部材５２の支持部５２５とに支持されている。なお、端面２３にはコネクタ部２７が構成されている。 As shown in FIGS. 2, 3, 4 and 6, in this embodiment, the convex portion 26 is formed, and the end surface 23 on the anti-output side of the body portion 20 is a circular convex formed of a bearing on the anti-output side. A portion 262 is formed, and a second O-ring 72 as a rubber O-ring 7 is mounted around the convex portion 262. The second O-ring 72 is held between the step portion 516c formed on the support portion 515 of the first case member 51 and the step portion 526c formed on the support portion 525 of the second case member 52. Therefore, the convex portion 262 is supported by the support portion 515 of the first case member 51 and the support portion 525 of the second case member 52 via the second O-ring 72. The end face 23 is configured with a connector portion 27.

（第１ケース部材５１と第２ケース部材５２との結合構造）
図７は、図２に示す第１ケース部材５１の側板部５１２と第２ケース部材５２の側板部５１２と重なり部分の断面図である。 (Combined structure of the first case member 51 and the second case member 52)
FIG. 7 is a cross-sectional view of a portion overlapping the side plate portion 512 of the first case member 51 and the side plate portion 512 of the second case member 52 shown in FIG.

図３および図４に示すように、第１ケース部材５１の側板部５１２の先端部、および第２ケース部材５２の側板部５２２の先端部の一方の先端部は、他方の先端部の側に向いた第１段部を内側に構成する第１薄板部を備え、他方の先端部は、一方の先端部の側に向いた第２段部を外側に構成する第２薄板部を備えている。 As shown in FIGS. 3 and 4, one tip of the side plate 512 of the first case member 51 and one tip of the side plate 522 of the second case member 52 are on the side of the other tip. The first thin plate portion facing the first step portion is provided on the inside, and the other tip portion is provided with the second thin plate portion forming the second step portion facing the side of one tip portion on the outside. ..

本形態において、第２ケース部材５２の側板部５２２の先端部は、支持部５２５以外の個所に、第１ケース部材５１の側板部５１２の先端部の側に向いた第１段部５２８ａを内側に構成する第１薄板部５２８ｂを備えている。また、第１ケース部材５１の側板部５１２の先端部は、支持部５１５以外の個所に、第２ケース部材５２の側板部５２２の先端部の側に向いた第２段部５１８ａを外側に構成する第２薄板部５１８ｂを備えている。 In the present embodiment, the tip of the side plate portion 522 of the second case member 52 is inside the first step portion 528a facing the tip end portion of the side plate portion 512 of the first case member 51 at a location other than the support portion 525. It is provided with a first thin plate portion 528b configured in the above. Further, the tip portion of the side plate portion 512 of the first case member 51 is configured with a second step portion 518a facing the tip portion side of the side plate portion 522 of the second case member 52 on the outside at a location other than the support portion 515. A second thin plate portion 518b is provided.

ここで、ボルト５５によって第１ケース部材５１と第２ケース部材５２とを結合した際、図７に示すように、第１薄板部５２８ｂが第２薄板部５１８ｂに隙間Ｇを介して外側から重なった状態で、第１薄板部５２８ｂが第２段部５１８ａに当接し、第２薄板部５１８ｂが第１段部５２８ａに当接している。 Here, when the first case member 51 and the second case member 52 are connected by the bolt 55, as shown in FIG. 7, the first thin plate portion 528b overlaps the second thin plate portion 518b from the outside through the gap G. In this state, the first thin plate portion 528b is in contact with the second step portion 518a, and the second thin plate portion 518b is in contact with the first step portion 528a.

なお、第１ケース部材５１の側板部５１２の先端部に第１段部および第１薄板部を設け、第２ケース部材５２の側板部５２２の先端部に第２段部および第２薄板部を設けてもよい。 The first step portion and the first thin plate portion are provided at the tip portion of the side plate portion 512 of the first case member 51, and the second step portion and the second thin plate portion are provided at the tip portion of the side plate portion 522 of the second case member 52. It may be provided.

（本形態の主な効果）
以上説明したように、本形態のギアードモータ１では、駆動源としてＤＣブラシレスモ
ータ２が用いられているため、ブラシ付きモータを用いた場合より静音化を図ることができる。また、モータ軸２５にはウォームギア２９が設けられ、歯車伝達機構３には、ウォームギア２９と噛み合う第１斜歯歯車３１が用いられているため、歯車同士の噛み合いノイズを低減することができる。また、ＤＣブラシレスモータ２の胴部２０とケース５との間に防振ゴム６が設けられているため、ＤＣブラシレスモータ２の振動がケース５に伝達されにくい。それ故、ギアードモータ１の静音化を図ることができる。 (Main effect of this form)
As described above, in the geared motor 1 of the present embodiment, since the DC brushless motor 2 is used as the drive source, it is possible to reduce the noise as compared with the case of using the brushed motor. Further, since the worm gear 29 is provided on the motor shaft 25 and the first oblique tooth gear 31 that meshes with the worm gear 29 is used for the gear transmission mechanism 3, the meshing noise between the gears can be reduced. Further, since the anti-vibration rubber 6 is provided between the body 20 of the DC brushless motor 2 and the case 5, the vibration of the DC brushless motor 2 is difficult to be transmitted to the case 5. Therefore, it is possible to reduce the noise of the geared motor 1.

特に、歯車伝達機構３において第１斜歯歯車３１は、可撓性材料からなる。このため、最も回転速度が高い歯車間における噛み合いノイズを低減することができる。また、歯車伝達機構３に用いた複数の歯車の全てが斜歯歯車である。このため、歯車伝達機構３の全体において、歯車同士の噛み合いノイズを低減することができる。それ故、ギアードモータ１の静音化を図ることができる。 In particular, in the gear transmission mechanism 3, the first oblique tooth gear 31 is made of a flexible material. Therefore, meshing noise between the gears having the highest rotation speed can be reduced. Further, all of the plurality of gears used in the gear transmission mechanism 3 are oblique tooth gears. Therefore, it is possible to reduce the meshing noise between the gears in the entire gear transmission mechanism 3. Therefore, it is possible to reduce the noise of the geared motor 1.

また、防振ゴム６は、ＤＣブラシレスモータ２の胴部２０と第１ケース部材５１との間、および胴部２０と第２ケース部５２材との間の各々に挟まれているため、ＤＣブラシレスモータ２の振動が第１ケース部材５１、および第２ケース部材５２の各々に伝達されることを抑制することができる。また、防振ゴム６は、胴部２０の外周面のうち、第１ケース部材５１側の面に貼付された第１防振ゴム６１と、第２ケース部材５２側の面に貼付された第２防振ゴム６２とを含む。このため、ＤＣブラシレスモータ２の胴部２０に筒状の防振ゴムを嵌める態様より、防振ゴム６を設けるのが容易である。 Further, since the anti-vibration rubber 6 is sandwiched between the body portion 20 of the DC brushless motor 2 and the first case member 51, and between the body portion 20 and the second case portion 52 material, DC. It is possible to suppress the vibration of the brushless motor 2 from being transmitted to each of the first case member 51 and the second case member 52. Further, the anti-vibration rubber 6 is attached to the first anti-vibration rubber 61 attached to the surface on the first case member 51 side and the second surface on the second case member 52 side of the outer peripheral surface of the body portion 20. 2 Includes anti-vibration rubber 62. Therefore, it is easier to provide the anti-vibration rubber 6 than the mode in which the tubular anti-vibration rubber is fitted to the body 20 of the DC brushless motor 2.

また、ＤＣブラシレスモータ２の胴部２０の凸部２６１（軸受）は、ゴム製の第１Ｏリング７１を介して第１ケース部材５１の支持部５１４と第２ケース部材５２の支持部５２４とに支持され、胴部２０の凸部２６２（軸受）は、ゴム製の第２Ｏリング７２を介して第１ケース部材５１の支持部５１５と第２ケース部材５２の支持部５２５とに支持されている。従って、ＤＣブラシレスモータ２の振動がケース５に伝わりにくい。それ故、ギアードモータ１の静音化を図ることができる。 Further, the convex portion 261 (bearing) of the body portion 20 of the DC brushless motor 2 is formed into a support portion 514 of the first case member 51 and a support portion 524 of the second case member 52 via a rubber first O-ring 71. The convex portion 262 (bearing) of the body portion 20 is supported by the support portion 515 of the first case member 51 and the support portion 525 of the second case member 52 via the rubber second O-ring 72. .. Therefore, the vibration of the DC brushless motor 2 is not easily transmitted to the case 5. Therefore, it is possible to reduce the noise of the geared motor 1.

また、ボルト５５によって第１ケース部材５１と第２ケース部材５２とを結合した際、第１薄板部５２８ｂが第２薄板部５１８ｂに外側から重なった状態となるので、ケース５の内部に異物が侵入しにくい。また、第１薄板部５２８ｂが第２薄板部５１８ｂに隙間Ｇを介して外側から重なるため、第１薄板部５２８ｂと第２薄板部５１８ｂとが接触と離間とを繰り返すことに起因するビビリ音が発生しにくい。また、第１ケース部材５１は、複数の歯車（第１斜歯歯車５１および第２斜歯歯車５２）の各々を囲むように延在する円弧状の壁部５１９ａ、５１９ｂを備えている。従って、ケース５内での動作音の反響を抑制することができる。それ故、ギアードモータ１の静音化を図ることができる。 Further, when the first case member 51 and the second case member 52 are connected by the bolt 55, the first thin plate portion 528b is in a state of overlapping the second thin plate portion 518b from the outside, so that foreign matter is inside the case 5. Hard to invade. Further, since the first thin plate portion 528b overlaps the second thin plate portion 518b from the outside through the gap G, the chattering noise caused by the repeated contact and separation of the first thin plate portion 528b and the second thin plate portion 518b is generated. It is hard to occur. Further, the first case member 51 includes arc-shaped wall portions 519a and 319b extending so as to surround each of the plurality of gears (first oblique tooth gear 51 and second oblique tooth gear 52). Therefore, it is possible to suppress the reverberation of the operating sound in the case 5. Therefore, it is possible to reduce the noise of the geared motor 1.

［実施形態２］
図８は、本発明の実施形態２に係るギアードモータ１の斜視図である。図９は、図８に示すギアードモータ１の分解斜視図である。図１０は、図９に示す歯車伝達機構３等を第２ケース部材５２の側からみた斜視図である。本形態および後述する実施形態３の基本的な構成は、実施形態１と同様であるため、共通する部分に同一の符号を付して図示し、それらの説明を省略する。 [Embodiment 2]
FIG. 8 is a perspective view of the geared motor 1 according to the second embodiment of the present invention. FIG. 9 is an exploded perspective view of the geared motor 1 shown in FIG. FIG. 10 is a perspective view of the gear transmission mechanism 3 and the like shown in FIG. 9 as viewed from the side of the second case member 52. Since the basic configurations of this embodiment and the third embodiment described later are the same as those of the first embodiment, the common parts are illustrated with the same reference numerals, and the description thereof will be omitted.

図８、図９および図１０に示すように、本形態のギアードモータ１も、実施形態１と同様、出力部材４と、駆動源としてのＤＣブラシレスモータ２と、ＤＣブラシレスモータ２の回転を出力部材４に伝達する歯車伝達機構３と、出力部材４の少なくとも一部、ＤＣブラシレスモータ２、および歯車伝達機構３を内側に収容するケース５とを有している。本形態においても、実施形態１と同様、ＤＣブラシレスモータ２のモータ軸線はＸ軸方向に沿って延在し、出力部材４、および歯車伝達機構３の複数の歯車の回転中心軸線はＺ軸方
向に沿って延在している。 As shown in FIGS. 8, 9 and 10, the geared motor 1 of the present embodiment also outputs the rotation of the output member 4, the DC brushless motor 2 as a drive source, and the DC brushless motor 2 as in the first embodiment. It has a gear transmission mechanism 3 that transmits to the member 4, and a case 5 that houses at least a part of the output member 4, a DC brushless motor 2, and a gear transmission mechanism 3 inside. Also in this embodiment, as in the first embodiment, the motor axis of the DC brushless motor 2 extends along the X-axis direction, and the rotation center axes of the output member 4 and the plurality of gears of the gear transmission mechanism 3 are in the Z-axis direction. It extends along.

本形態においては、複数の出力部材４が設けられており、ＤＣブラシレスモータ２を作動させると、歯車伝達機構３は、ＤＣブラシレスモータ２の回転を複数の出力部材４に伝達する。本形態では、複数の出力部材４として、２つの出力部材４（第１出力部材４Ａおよび第２出力部材４Ｂ）が設けられている。 In this embodiment, a plurality of output members 4 are provided, and when the DC brushless motor 2 is operated, the gear transmission mechanism 3 transmits the rotation of the DC brushless motor 2 to the plurality of output members 4. In this embodiment, two output members 4 (first output member 4A and second output member 4B) are provided as the plurality of output members 4.

第１出力部材４Ａおよび第２出力部材４Ｂは、Ｙ軸方向で離間する位置に配置されており、ＤＣブラシレスモータ２は、Ｙ軸方向において第１出力部材４Ａおよび第２出力部材４Ｂの間で、ウォームギア２９をＸ軸方向の一方側Ｘ１に向けている。このため、歯車伝達機構３は、ウォームギア２９の回転を第１出力部材４Ａに伝達する第１伝達機構３Ａと、ウォームギア２９の回転を第２出力部材４Ｂに伝達する第２伝達機構３Ｂとを有している。 The first output member 4A and the second output member 4B are arranged at positions separated in the Y-axis direction, and the DC brushless motor 2 is placed between the first output member 4A and the second output member 4B in the Y-axis direction. , The worm gear 29 is directed to one side X1 in the X-axis direction. Therefore, the gear transmission mechanism 3 has a first transmission mechanism 3A that transmits the rotation of the worm gear 29 to the first output member 4A, and a second transmission mechanism 3B that transmits the rotation of the worm gear 29 to the second output member 4B. doing.

第１伝達機構３Ａと第２伝達機構３Ｂとは、ウォームギア２９の軸線を通る仮想面を中心とする面対称に配置されている。より具体的には、第１伝達機構３Ａは、ウォームギア２９と噛み合う第１斜歯歯車３１と、第１斜歯歯車３１と噛み合う第２斜歯歯車３２とを備えており、第２斜歯歯車３２は、第１出力部材４Ａの歯車部４１（斜歯歯車）と噛み合っている。第２伝達機構３Ｂは、ウォームギア２９と噛み合う第１斜歯歯車３１と、第１斜歯歯車３１と噛み合う第２斜歯歯車３２とを備えており、第２斜歯歯車３２は、第２出力部材４Ｂの歯車部４１（斜歯歯車）と噛み合っている。第１伝達機構３Ａ、および第２伝達機構３Ｂの各々において、第１斜歯歯車３１は、可撓性材料からなる。その他の構成は、実施形態１と略同様である。 The first transmission mechanism 3A and the second transmission mechanism 3B are arranged symmetrically with respect to a virtual surface passing through the axis of the worm gear 29. More specifically, the first transmission mechanism 3A includes a first oblique gear 31 that meshes with the worm gear 29 and a second oblique gear 32 that meshes with the first oblique gear 31. 32 meshes with the gear portion 41 (oblique tooth gear) of the first output member 4A. The second transmission mechanism 3B includes a first oblique gear 31 that meshes with the worm gear 29 and a second oblique gear 32 that meshes with the first oblique gear 31, and the second oblique gear 32 has a second output. It meshes with the gear portion 41 (oblique tooth gear) of the member 4B. In each of the first transmission mechanism 3A and the second transmission mechanism 3B, the first oblique gear 31 is made of a flexible material. Other configurations are substantially the same as those in the first embodiment.

このように構成したギアードモータ１でも、実施形態１と同様、駆動源としてＤＣブラシレスモータ２が用いられているため、ブラシ付きモータを用いた場合より静音化を図ることができる。また、モータ軸２５にはウォームギア２９が設けられ、歯車伝達機構３では、第１伝達機構３Ａおよび第２伝達機構３Ｂのいずれにおいても、ウォームギア２９と噛み合う第１斜歯歯車３１が用いられているため、歯車同士の噛み合いノイズを低減することができる。また、ＤＣブラシレスモータ２の胴部２０とケース５との間に防振ゴム６が設けられているため、ＤＣブラシレスモータ２の振動がケース５に伝達されにくい。それ故、ギアードモータ１の静音化を図ることができる等、実施形態１と略同様な効果を奏する。 Since the DC brushless motor 2 is used as the drive source in the geared motor 1 configured as described above as in the first embodiment, the noise can be reduced as compared with the case where the brushed motor is used. Further, a worm gear 29 is provided on the motor shaft 25, and in the gear transmission mechanism 3, the first oblique tooth gear 31 that meshes with the worm gear 29 is used in both the first transmission mechanism 3A and the second transmission mechanism 3B. Therefore, it is possible to reduce the meshing noise between the gears. Further, since the anti-vibration rubber 6 is provided between the body 20 of the DC brushless motor 2 and the case 5, the vibration of the DC brushless motor 2 is difficult to be transmitted to the case 5. Therefore, it is possible to reduce the noise of the geared motor 1 and obtain substantially the same effect as that of the first embodiment.

［実施形態３］
図１１は、本発明の実施形態３に係るギアードモータ１の斜視図である。図１２は、図１１に示すギアードモータ１の分解斜視図である。図１３は、図１２に示す歯車伝達機構３等を第２ケース部材５２の側からみた斜視図である。なお、図１１、図１２および図１３では、図１および図８等とＸ軸およびＹ軸の延在方向が相違している。 [Embodiment 3]
FIG. 11 is a perspective view of the geared motor 1 according to the third embodiment of the present invention. FIG. 12 is an exploded perspective view of the geared motor 1 shown in FIG. FIG. 13 is a perspective view of the gear transmission mechanism 3 and the like shown in FIG. 12 as viewed from the side of the second case member 52. Note that, in FIGS. 11, 12, and 13, the extending directions of the X-axis and the Y-axis are different from those of FIGS. 1 and 8 and the like.

図１１、図１２および図１３に示すように、本形態のギアードモータ１も、実施形態１と同様、出力部材４と、駆動源としてのＤＣブラシレスモータ２と、ＤＣブラシレスモータ２の回転を出力部材４に伝達する歯車伝達機構３と、出力部材４の少なくとも一部、ＤＣブラシレスモータ２、および歯車伝達機構３を内側に収容するケース５とを有している。本形態においても、実施形態１と同様、ＤＣブラシレスモータ２のモータ軸線はＸ軸方向に沿って延在し、出力部材４、および歯車伝達機構３の複数の歯車の回転中心軸線はＺ軸方向に沿って延在している。 As shown in FIGS. 11, 12 and 13, the geared motor 1 of the present embodiment also outputs the output member 4, the DC brushless motor 2 as a drive source, and the rotation of the DC brushless motor 2 as in the first embodiment. It has a gear transmission mechanism 3 that transmits to the member 4, and a case 5 that houses at least a part of the output member 4, a DC brushless motor 2, and a gear transmission mechanism 3 inside. Also in this embodiment, as in the first embodiment, the motor axis of the DC brushless motor 2 extends along the X-axis direction, and the rotation center axes of the output member 4 and the plurality of gears of the gear transmission mechanism 3 are in the Z-axis direction. It extends along.

本形態においては、複数の出力部材４が設けられており、ＤＣブラシレスモータ２を作動させると、歯車伝達機構３は、ＤＣブラシレスモータ２の回転を複数の出力部材４に伝
達する。本形態では、複数の出力部材４として、２つの出力部材４（第１出力部材４Ａおよび第２出力部材４Ｂ）が設けられている。第１出力部材４Ａおよび第２出力部材４Ｂは、Ｘ軸方向で離間する位置に配置されており、第１出力部材４Ａに対してＹ軸方向の一方側Ｙ１で隣り合う位置には、Ｘ軸方向にウォームギア２９の軸線方向を向けるようにＤＣブラシレスモータ２が配置されている。 In this embodiment, a plurality of output members 4 are provided, and when the DC brushless motor 2 is operated, the gear transmission mechanism 3 transmits the rotation of the DC brushless motor 2 to the plurality of output members 4. In this embodiment, two output members 4 (first output member 4A and second output member 4B) are provided as the plurality of output members 4. The first output member 4A and the second output member 4B are arranged at positions separated from each other in the X-axis direction, and the X-axis is located at a position adjacent to the first output member 4A on one side Y1 in the Y-axis direction. The DC brushless motor 2 is arranged so as to direct the axial direction of the worm gear 29 in the direction.

歯車伝達機構３は、ウォームギア２９と噛み合う第１斜歯歯車３１と、第１斜歯歯車３１と噛み合う第２斜歯歯車３２とを有しており、第２斜歯歯車３２は、第１出力部材４Ａの歯車部４１（斜歯歯車）、および第２出力部材４Ｂと噛み合っている。従って、歯車伝達機構３において、第１斜歯歯車３１および第２斜歯歯車３２は、第１出力部材４Ａの駆動、および第２出力部材４Ｂの駆動において共用されている。それ故、歯車伝達機構３は、ウォームギア２９の回転を第１斜歯歯車３１、および第２斜歯歯車３２を介して第１出力部材４Ａに伝達するとともに、ウォームギア２９の回転を第１斜歯歯車３１、および第２斜歯歯車３２を介して第２出力部材４Ｂに伝達することができる。本形態において、第１斜歯歯車３１は、可撓性材料からなる。その他の構成は、実施形態１と略同様である。 The gear transmission mechanism 3 has a first oblique gear 31 that meshes with the worm gear 29 and a second oblique gear 32 that meshes with the first oblique gear 31, and the second oblique gear 32 has a first output. It meshes with the gear portion 41 (oblique gear) of the member 4A and the second output member 4B. Therefore, in the gear transmission mechanism 3, the first oblique tooth gear 31 and the second oblique tooth gear 32 are shared in the drive of the first output member 4A and the drive of the second output member 4B. Therefore, the gear transmission mechanism 3 transmits the rotation of the worm gear 29 to the first output member 4A via the first oblique gear 31 and the second oblique gear 32, and transmits the rotation of the worm gear 29 to the first oblique tooth. It can be transmitted to the second output member 4B via the gear 31 and the second oblique gear 32. In this embodiment, the first oblique gear 31 is made of a flexible material. Other configurations are substantially the same as those in the first embodiment.

このように構成したギアードモータ１でも、実施形態１と同様、駆動源としてＤＣブラシレスモータ２が用いられているため、ブラシ付きモータを用いた場合より静音化を図ることができる。また、モータ軸２５にはウォームギア２９が設けられ、歯車伝達機構３では、ウォームギア２９と噛み合う第１斜歯歯車３１が用いられているため、歯車同士の噛み合いノイズを低減することができる。また、ＤＣブラシレスモータ２の胴部２０とケース５との間に防振ゴム６が設けられているため、ＤＣブラシレスモータ２の振動がケース５に伝達されにくい。それ故、ギアードモータ１の静音化を図ることができる等、実施形態１と略同様な効果を奏する。 Since the DC brushless motor 2 is used as the drive source in the geared motor 1 configured as described above as in the first embodiment, the noise can be reduced as compared with the case where the brushed motor is used. Further, since the worm gear 29 is provided on the motor shaft 25 and the first oblique tooth gear 31 that meshes with the worm gear 29 is used in the gear transmission mechanism 3, the meshing noise between the gears can be reduced. Further, since the anti-vibration rubber 6 is provided between the body 20 of the DC brushless motor 2 and the case 5, the vibration of the DC brushless motor 2 is difficult to be transmitted to the case 5. Therefore, it is possible to reduce the noise of the geared motor 1 and obtain substantially the same effect as that of the first embodiment.

［実施形態４］
出力部材４は、３つあるいは４つ以上であってもよい。例えば、実施形態３において、さらに、ウォームギア２９の軸線を通る仮想面を中心に面対称に２つの出力部材４および歯車伝達機構３を設ければ、共通のＤＣブラシレスモータ２によって、４つの出力部材４を駆動することができる。 [Embodiment 4]
The number of output members 4 may be three or four or more. For example, in the third embodiment, if two output members 4 and a gear transmission mechanism 3 are provided symmetrically with respect to a virtual surface passing through the axis of the worm gear 29, four output members are provided by a common DC brushless motor 2. 4 can be driven.

［他の実施形態］
実施形態２、３では第１ケース部材５１の端板部５１１が略平板状であったが、端板部５１１に実施形態１で説明した凹部５１９、および壁部５１９ａ、５１９ｂを設けてもよい。 [Other Embodiments]
In the second and third embodiments, the end plate portion 511 of the first case member 51 has a substantially flat plate shape, but the end plate portion 511 may be provided with the recess 519 and the wall portions 519a and 319b described in the first embodiment. ..

１…ギアードモータ、２…ＤＣブラシレスモータ、３…歯車伝達機構、３Ａ…第１伝達機構、３Ｂ…第２伝達機構、４…出力部材、４Ａ…第１出力部材、４Ｂ…第２出力部材、５…ケース、６…防振ゴム、７…Ｏリング、２０…胴部、２１、２３…端面、２５…モータ軸、２６、２６１、２６２…凸部、２８…筒状部材、２９…ウォームギア、３１…第１斜歯歯車、３２…第２斜歯歯車、４１…歯車部、５１…第１ケース部材、５２…第２ケース部材、６１…第１防振ゴム、６２…第２防振ゴム、７１…第１Ｏリング、７２…第２Ｏリング、５１１、５２１…端板部、５１２、５２２…側板部、５１８ａ…第２端部、５１８ｂ…第２薄板部、５１９ａ、５１９ｂ…壁部、５２８ａ…第１段部、５２８ｂ…第１薄板部、Ｇ…隙間 1 ... Geared motor, 2 ... DC brushless motor, 3 ... Gear transmission mechanism, 3A ... 1st transmission mechanism, 3B ... 2nd transmission mechanism, 4 ... Output member, 4A ... 1st output member, 4B ... 2nd output member, 5 ... Case, 6 ... Anti-vibration rubber, 7 ... O-ring, 20 ... Body, 21, 23 ... End face, 25 ... Motor shaft, 26, 261, 262 ... Convex part, 28 ... Cylindrical member, 29 ... Worm gear, 31 ... 1st oblique gear, 32 ... 2nd oblique gear, 41 ... Gear part, 51 ... 1st case member, 52 ... 2nd case member, 61 ... 1st anti-vibration rubber, 62 ... 2nd anti-vibration rubber , 71 ... 1st O-ring, 72 ... 2nd O-ring, 511, 521 ... End plate, 512, 522 ... Side plate, 518a ... 2nd end, 518b ... 2nd thin plate, 519a, 319b ... Wall, 528a ... 1st stage part, 528b ... 1st thin plate part, G ... Gap

Claims

Output member and
DC brushless motor and
A worm gear provided on the motor shaft of the DC brushless motor and
A gear transmission mechanism that includes a plurality of gears including an oblique tooth gear that meshes with the worm gear and transmits the rotation of the DC brushless motor to the output member.
A case for accommodating at least a part of the output member, the DC brushless motor, and the gear transmission mechanism inside.
Anti-vibration rubber sandwiched between the body of the DC brushless motor and the case,
A geared motor characterized by having.

In the geared motor according to claim 1,
A geared motor characterized in that all of the plurality of gears are oblique tooth gears.

In the geared motor according to claim 1 or 2.
A geared motor characterized in that the oblique tooth gear that meshes with the worm gear in the gear transmission mechanism is made of a flexible material.

The geared motor according to any one of claims 1 to 3.
The end face of the body on the output side where the motor shaft is provided, and the end face on the opposite side of the body opposite to the end face on the output side, at least one end face is made of rubber O. With a convex part with a ring attached,
The geared motor is characterized in that the convex portion is supported by the case via the O-ring.

In the geared motor according to any one of claims 1 to 4.
The case is a geared motor including an arc-shaped wall portion extending so as to surround each of the plurality of gears.

The geared motor according to any one of claims 1 to 5.
The case includes a first case member that overlaps the body portion from one side in a direction orthogonal to the axial direction of the body portion, and a second case member that overlaps the body portion from the side opposite to the first case member. With a case member,
The geared motor is characterized in that the anti-vibration rubber is sandwiched between the body portion and the first case member and between the body portion and the second case member.

In the geared motor according to claim 6,
The anti-vibration rubber includes a first anti-vibration rubber attached to the surface of the first case member side of the outer peripheral surface of the body portion and a second anti-vibration rubber attached to the surface of the second case member side. A geared motor characterized by containing rubber.

In the geared motor according to claim 6 or 7.
The tip of the side plate of the first case and one of the tips of the side plate of the second case form the first step portion facing the side of the other tip inside. One thin plate portion is provided, and the other tip portion includes a second thin plate portion that constitutes the second step portion facing the side of the one tip portion on the outside.
With the first thin plate portion overlapping the second thin plate portion from the outside through a gap, the first thin plate portion abuts on the second step portion, and the second thin plate portion is placed on the first step portion. A geared motor characterized by being in contact.

In the geared motor according to any one of claims 1 to 8.
A plurality of the output members are provided.
The gear transmission mechanism is a geared motor characterized in that the rotation of the worm gear is transmitted to each of the plurality of output members.