TW202012811A - Drive device - Google Patents

Drive device Download PDF

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TW202012811A
TW202012811A TW108131583A TW108131583A TW202012811A TW 202012811 A TW202012811 A TW 202012811A TW 108131583 A TW108131583 A TW 108131583A TW 108131583 A TW108131583 A TW 108131583A TW 202012811 A TW202012811 A TW 202012811A
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Taiwan
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axial direction
stator
rotor
drive device
bearing
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TW108131583A
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Chinese (zh)
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TWI728450B (en
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田中圭祐
大塚智之
岡村暉久夫
井上仁
顏國智
吳耿彰
何昆耀
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日商日本電產新寶股份有限公司
日商日本電產股份有限公司
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/28Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • H02K16/02Machines with one stator and two or more rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Retarders (AREA)

Abstract

This drive device comprises: a rigid internal gear, a flexible external gear, a non-circular cam, a stator, and a rotor. The rotor has a rotary shaft, a disc part, and a magnet. The rotary shaft of the rotor is inserted into a through-hole of the stator. The disc part of the rotor is sandwiched between one side of the cam in an axial direction and the other side of the rotary shaft in the axial direction, and is coupled to the cam and the rotary shaft. The magnet is fixed to a portion of the disc part. A meshing part between an internal teeth of the rigid internal gear and an external teeth of the flexible external gear is opposite to a plate surface on the other side of the disc part in the axial direction with a space interposed therebetween in the axial direction.

Description

驅動裝置Drive

本發明是有關於一種驅動裝置。The invention relates to a driving device.

先前,已知有如下的方式的驅動裝置:藉由電動機來產生作為機械能的旋轉,利用後段的機械式的減速機進行減速,並將減速後的旋轉作為動力而取出。例如,於日本專利第4833028號公報中揭示有此種驅動裝置。Conventionally, there has been known a drive device that generates rotation as mechanical energy by an electric motor, decelerates with a mechanical reducer in the rear stage, and takes out the decelerated rotation as power. For example, Japanese Patent No. 4833028 discloses such a driving device.

日本專利第4833028號公報中所揭示的致動器於馬達(3)的前端側包括連結成同軸狀態的波動齒輪減速機(5)。波動齒輪減速機(5)包括:圓環狀的剛性內齒齒輪(51)、呈同軸狀地配置於剛性內齒齒輪(51)的內側的可撓性外齒齒輪(52)、以及呈同軸狀地嵌入可撓性外齒齒輪(52)的內側的橢圓形輪郭的波動產生器(53)。於日本專利第4833028號公報的致動器中,藉由所述構成,若作為馬達(3)的旋轉軸的馬達旋轉軸(31)進行旋轉,則伴隨於此,波動產生器(53)受到驅動,可撓性外齒齒輪(52)彎曲變形成橢圓狀,自可撓性外齒齒輪(52)或剛性內齒齒輪(51),對應於兩齒輪的齒數差而輸出經大幅度減速的旋轉。The actuator disclosed in Japanese Patent No. 4833028 includes a wave gear reducer (5) connected in a coaxial state on the front end side of the motor (3). The wave gear reducer (5) includes an annular rigid internal gear (51), a flexible external gear (52) disposed coaxially inside the rigid internal gear (51), and coaxial A wave generator (53) embedded in an elliptical wheel on the inside of the flexible externally toothed gear (52). In the actuator of Japanese Patent No. 4833028, with the above-mentioned configuration, if the motor rotating shaft (31) as the rotating shaft of the motor (3) rotates, the wave generator (53) is accompanied by this Drive, the flexible external gear (52) bends into an ellipse, and the output from the flexible external gear (52) or the rigid internal gear (51) corresponds to the difference in the number of teeth between the two gears and is greatly reduced Spin.

再者,在馬達(3)與波動齒輪減速機(5)之間配置有前側端蓋(36),配置所述兩齒輪的咬合部的區域與配置馬達(3)的區域藉由前側端蓋(36)來分隔。另外,於前側端蓋(36)的內周面部分安裝固定有馬達定子(33)。另外,於前側端蓋(36)的內周端安裝有軸承(45)。經由該軸承(45),馬達轉子(32)相對於馬達定子(33)以旋轉自如的狀態得到支持。 [專利文獻1]日本專利第4833028號公報Furthermore, a front end cover (36) is arranged between the motor (3) and the wave gear reducer (5), and the area where the engagement portion of the two gears is arranged and the area where the motor (3) is arranged are provided by the front end cover (36) to separate. In addition, a motor stator (33) is attached and fixed to the inner peripheral surface of the front end cover (36). In addition, a bearing (45) is attached to the inner peripheral end of the front end cover (36). Via this bearing (45), the motor rotor (32) is supported rotatably with respect to the motor stator (33). [Patent Document 1] Japanese Patent No. 4833028

[發明所欲解決之課題][Problems to be solved by the invention]

於如日本專利第4833028號公報中記載的構成的致動器中,所述兩齒輪(51)、(52)的咬合部藉由前側端蓋(36)而與配置馬達(3)的區域隔開。因此,可認為於被填充至兩齒輪的咬合部的潤滑油難以到達配置馬達(3)的區域這一點上有利。但是,若如所述般在配置兩齒輪的咬合部的區域與配置馬達(3)的區域之間設置有前側端蓋(36),則於致動器的軸方向的厚度變大這一點上,不利於軸方向的薄型化。In the actuator configured as described in Japanese Patent No. 4833028, the engaging portions of the two gears (51) and (52) are separated from the area where the motor (3) is arranged by the front end cover (36) open. Therefore, it can be considered that the lubricating oil filled in the nip portion of the two gears is difficult to reach the area where the motor (3) is arranged. However, if the front end cover (36) is provided between the area where the engagement portion of the two gears is arranged and the area where the motor (3) is arranged as described above, the thickness in the axial direction of the actuator becomes large , Not conducive to thinning in the axis direction.

尤其,於如日本專利第4833028號公報中記載的構成的致動器中,前側端蓋(36)具有於內周端保持軸承(45)的功能,因此難以簡單地將前側端蓋(36)的厚度薄型化。In particular, in the actuator configured as described in Japanese Patent No. 4833028, the front end cover (36) has the function of holding the bearing (45) at the inner peripheral end, so it is difficult to simply replace the front end cover (36) The thickness is thinner.

本發明是鑑於以上的情況而成者,其潛在的目的在於提供一種可使軸方向的厚度變薄,並且謀求輕量化的驅動裝置。 [解決課題之手段]The present invention was made in view of the above circumstances, and its potential object is to provide a drive device that can reduce the thickness in the axial direction and achieve weight reduction. [Means to solve the problem]

本發明欲解決的課題如上所述,繼而,對用於解決該課題的方法進行說明。The problem to be solved by the present invention is as described above, and then, a method for solving the problem will be described.

於本發明的觀點中,提供以下的構成的驅動裝置。即,該驅動裝置包括:外殼、馬達外殼、圓環狀的剛性內齒齒輪、可撓性的環狀的可撓性外齒齒輪、非真圓狀的凸輪、圓板狀的定子、以及轉子。所述外殼具有於軸方向上延長的筒狀部。所述馬達外殼具有於同軸上連接於所述外殼的所述軸方向的一側的馬達筒狀部。所述剛性內齒齒輪以無法相對於所述外殼的內周面旋轉的方式固定於所述外殼的所述內周面,且所述剛性內齒齒輪於內周部具有內齒。所述可撓性外齒齒輪配置於所述剛性內齒齒輪的徑向內側,於所述軸方向的所述一側的外周部具有齒數與所述內齒不同的外齒,於所述軸方向的所述另一側具有能夠安裝輸出構件的安裝部。所述凸輪配置於所述可撓性外齒齒輪的徑向內側,藉由進行旋轉來使所述可撓性外齒齒輪的所述外周部於徑向上彎曲變形,而使所述內齒與所述外齒部分地咬合。所述定子以無法相對於所述馬達外殼旋轉的方式固定於所述馬達外殼,且所述定子於軸心部具有貫穿孔。所述轉子以能夠相對於所述定子旋轉的方式得到支持。所述轉子具有旋轉軸、圓板部、以及磁鐵。所述旋轉軸***所述定子的所述貫穿孔。所述圓板部於同軸上連接於所述旋轉軸的所述軸方向的所述另一側,所述軸方向的所述另一側的板面與所述凸輪的所述軸方向的所述一側結合。所述磁鐵固定於所述圓板部的所述軸方向的所述一側。而且,所述內齒與所述外齒的咬合部於所述軸方向上隔著空間且與所述圓板部的所述軸方向的所述另一側的板面相向。 [發明的效果]From the viewpoint of the present invention, a drive device having the following configuration is provided. That is, the driving device includes: a housing, a motor housing, a ring-shaped rigid internally toothed gear, a flexible ring-shaped flexible externally toothed gear, a non-circular cam, a disk-shaped stator, and a rotor . The housing has a cylindrical portion extending in the axial direction. The motor housing has a motor cylindrical portion coaxially connected to one side of the housing in the axial direction. The rigid internally toothed gear is fixed to the inner peripheral surface of the housing so as not to rotate relative to the inner peripheral surface of the housing, and the rigid internally toothed gear has internal teeth at the inner peripheral portion. The flexible externally toothed gear is disposed radially inward of the rigid internally toothed gear, and the outer peripheral portion on the one side in the axial direction has external teeth having a different number of teeth from the internal teeth, and is disposed on the shaft The other side of the direction has a mounting portion capable of mounting an output member. The cam is disposed radially inward of the flexible externally toothed gear, and the outer peripheral portion of the flexible externally toothed gear is bent and deformed in the radial direction by rotating to make the internal teeth and The external teeth partially engage. The stator is fixed to the motor housing so as not to be rotatable with respect to the motor housing, and the stator has a through hole at the axial center portion. The rotor is supported rotatably with respect to the stator. The rotor has a rotating shaft, a circular plate portion, and a magnet. The rotating shaft is inserted into the through hole of the stator. The circular plate portion is coaxially connected to the other side of the rotating shaft in the axial direction, and the plate surface of the other side in the axial direction and the axial direction of the cam The side is combined. The magnet is fixed to the one side of the circular plate portion in the axial direction. Moreover, the engaging portion of the internal teeth and the external teeth faces a plate surface on the other side in the axial direction of the circular plate portion with a space in the axial direction. [Effect of invention]

根據本發明的觀點,提供一種可使軸方向的厚度變薄,並且謀求輕量化的驅動裝置。From the viewpoint of the present invention, there is provided a driving device that can reduce the thickness in the axial direction and achieve weight reduction.

以下,一面參照圖式,一面對本申請案的例示性的實施方式進行說明。再者,於本申請案中,將與作為驅動裝置的轉子的旋轉中心的中心軸C平行的方向稱為「軸方向」,將與轉子的中心軸C垂直的方向稱為「徑向」,將沿著以轉子的中心軸C為中心的圓弧的方向稱為「圓周方向」來進行說明。Hereinafter, an exemplary embodiment of the present application will be described with reference to the drawings. Furthermore, in this application, the direction parallel to the central axis C of the rotation center of the rotor as the driving device is referred to as the “axial direction”, and the direction perpendicular to the central axis C of the rotor is referred to as the “radial direction”. The direction along the circular arc centered on the central axis C of the rotor will be referred to as the "circumferential direction".

<1.第一實施方式> 以下,參照圖1及圖2,對第一實施方式的驅動裝置100進行說明。圖1是表示本實施方式的驅動裝置100的構成的縱剖面圖。圖2是圖1中的II-II線剖面圖,表示咬合部的情況。但是,於圖2中,省略***剛性內齒齒輪30的緊固構件、及配置為較該剛性內齒齒輪30更靠近徑向外側的構件。<1. First embodiment> Hereinafter, the drive device 100 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a longitudinal cross-sectional view showing the configuration of a drive device 100 of this embodiment. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1 and shows the state of the nip portion. However, in FIG. 2, the fastening member inserted into the rigid internal gear 30 and the member disposed radially outward of the rigid internal gear 30 are omitted.

驅動裝置100包括:外殼10、馬達外殼20、圓環狀的剛性內齒齒輪30、可撓性的環狀的可撓性外齒齒輪40、具有非真圓狀的外周面的凸輪50、定子60、轉子70、以及輸出構件80。將外殼10與馬達外殼20合併而成者形成本實施方式的「外殼」。定子60及轉子70形成驅動裝置100的所謂的電動機的部分。剛性內齒齒輪30、可撓性外齒齒輪40、及凸輪50形成驅動裝置100的所謂的減速機的部分。The driving device 100 includes a housing 10, a motor housing 20, an annular rigid internal gear 30, a flexible annular flexible external gear 40, a cam 50 having a non-circular outer surface, and a stator 60. The rotor 70, and the output member 80. The combination of the housing 10 and the motor housing 20 forms the "housing" of this embodiment. The stator 60 and the rotor 70 form part of the so-called electric motor of the drive device 100. The rigid internally toothed gear 30, the flexible externally toothed gear 40, and the cam 50 form part of the so-called speed reducer of the drive device 100.

於本實施方式的驅動裝置100中,可藉由電動機的部分來產生作為機械能的旋轉,利用後段的減速機的部分進行減速,並將減速後的旋轉作為動力而取出。驅動裝置100可用於公知的各種用途,例如若應用於操作員幹力氣活時穿戴的輔助服(assist suit)的關節部,則適宜。於驅動裝置100的後述的安裝部42,安裝有用於朝外部取出減速後的旋轉的輸出構件80。In the drive device 100 of the present embodiment, the rotation of the mechanical energy can be generated by the part of the motor, the speed can be reduced by the part of the speed reducer at the rear stage, and the decelerated rotation can be taken out as power. The drive device 100 can be used for various well-known applications, and is suitable for application to the joint part of an assistant suit worn by the operator when he/she does hard work, for example. An output member 80 for taking out the decelerated rotation to the outside is attached to an attachment portion 42 of the drive device 100 described later.

外殼10於徑向內側大致收容驅動裝置100的減速機的部分。外殼10具有筒狀部11與連接部12。本實施方式的筒狀部11是於軸方向上延長的圓筒狀。連接部12是圓環形狀的板狀的部分。連接部12自筒狀部11的軸方向的一側的端部朝徑向外側延長。連接部12將筒狀部11與後述的馬達筒狀部21連接。The housing 10 substantially accommodates a portion of the reduction gear of the drive device 100 on the radially inner side. The housing 10 has a cylindrical portion 11 and a connecting portion 12. The cylindrical portion 11 of this embodiment has a cylindrical shape extending in the axial direction. The connection portion 12 is a plate-shaped portion having a ring shape. The connecting portion 12 extends radially outward from the axial end of the cylindrical portion 11. The connecting portion 12 connects the cylindrical portion 11 with a motor cylindrical portion 21 described later.

馬達外殼20於徑向內側收容驅動裝置100的電動機的部分。馬達外殼20具有馬達筒狀部21與蓋部22。本實施方式的馬達筒狀部21是於軸方向上延長的圓筒狀。蓋部22是大致圓板形狀的部分。蓋部22自馬達筒狀部21的軸方向的一側的端部朝徑向內側擴展。若換一種說法,則蓋部22堵塞馬達筒狀部21的軸方向的一側的端部。但是,於蓋部22的中央部,即軸心部設置貫穿孔22a。外殼10、馬達筒狀部21、以及蓋部22藉由使形成於各自的外周部的貫穿孔相互重疊,並將螺栓等公知的緊固構件***該些貫穿孔來結合。The motor housing 20 accommodates the portion of the motor of the drive device 100 on the radially inner side. The motor housing 20 has a motor cylindrical portion 21 and a cover portion 22. The motor cylindrical portion 21 of this embodiment has a cylindrical shape extending in the axial direction. The cover 22 is a substantially disk-shaped part. The cover portion 22 extends radially inward from the axial end of the motor cylindrical portion 21. In other words, the cover portion 22 closes the end of the motor cylindrical portion 21 on the axial direction side. However, a through hole 22a is provided in the central portion of the cover portion 22, that is, the axial center portion. The housing 10, the motor cylindrical portion 21, and the cover portion 22 are joined by overlapping through holes formed in the respective outer peripheral portions and inserting known fastening members such as bolts into these through holes.

如圖2所示,圓環狀的剛性內齒齒輪30於內周部以固定的間隔具有內齒31。本實施方式的剛性內齒齒輪30於外殼10的筒狀部11的一側的端部的位置上,以無法相對於筒狀部11的內周面旋轉的方式固定於筒狀部11的內周面。剛性內齒齒輪30的剛性遠高於後述的可撓性外齒齒輪40的形成有外齒41的部位的剛性。因此,實質上可將剛性內齒齒輪30看作剛體。As shown in FIG. 2, the ring-shaped rigid internally toothed gear 30 has internal teeth 31 at a fixed interval on the inner peripheral portion. The rigid internally toothed gear 30 of the present embodiment is fixed to the inside of the cylindrical portion 11 so as not to be rotatable with respect to the inner peripheral surface of the cylindrical portion 11 at the position of one end of the cylindrical portion 11 of the housing 10. Noodles. The rigidity of the rigid internally toothed gear 30 is much higher than the rigidity of the portion of the flexible externally toothed gear 40 described later where the external teeth 41 are formed. Therefore, the rigid internally toothed gear 30 can be regarded substantially as a rigid body.

如圖1及圖2所示,可撓性的環狀的可撓性外齒齒輪40配置於剛性內齒齒輪30的徑向內側。本實施方式的可撓性外齒齒輪40具有杯狀的形狀。更具體而言,可撓性外齒齒輪40以使其經堵塞之側朝向軸方向的另一側的狀態,配置於剛性內齒齒輪30的徑向內側。可撓性外齒齒輪40於軸方向的一側的外周部,以固定的間隔具有外齒41。可撓性外齒齒輪40的形成有外齒41的部位具有遠高於剛性內齒齒輪30的可撓性。外齒41的數量與所述內齒31的齒數略微不同。該齒數差可對應於所要求的減速比而設定成各種齒數差,例如亦可設為兩個。As shown in FIGS. 1 and 2, the flexible ring-shaped flexible externally toothed gear 40 is arranged radially inward of the rigid internally toothed gear 30. The flexible externally toothed gear 40 of this embodiment has a cup shape. More specifically, the flexible externally toothed gear 40 is arranged radially inward of the rigid internally toothed gear 30 in such a state that the blocked side faces the other side in the axial direction. The outer peripheral portion of the flexible externally toothed gear 40 on one side in the axial direction has external teeth 41 at fixed intervals. The portion of the flexible externally toothed gear 40 where the external teeth 41 are formed has much higher flexibility than the rigid internally toothed gear 30. The number of external teeth 41 is slightly different from the number of internal teeth 31. The difference in the number of teeth can be set to various difference in the number of teeth according to the required reduction ratio, for example, it can be set to two.

如圖1所示,可撓性外齒齒輪40於軸方向的另一側具有可安裝後述的輸出構件80的安裝部42。詳細而言,薄壁的圓環狀的部位自可撓性外齒齒輪40的筒狀的部分的軸方向上的另一側的端部朝徑向內側擴展。相對厚壁的圓環狀的安裝部42自該薄壁的圓環狀的部位朝徑向內側進一步擴展。As shown in FIG. 1, the flexible externally toothed gear 40 has a mounting portion 42 on which the output member 80 described later can be mounted on the other side in the axial direction. Specifically, the thin-walled ring-shaped portion expands radially inward from the other axial end of the cylindrical portion of the flexible externally toothed gear 40. The relatively thick annular mounting portion 42 further expands radially inward from the thin annular portion.

凸輪50配置於可撓性外齒齒輪40的徑向內側。凸輪50配置於與剛性內齒齒輪30同軸上。本實施方式的凸輪50具有橢圓形的凸輪輪廓。如其後進行詳述般,凸輪50伴隨轉子70的旋轉進行旋轉。於凸輪50的徑向外側設置可撓性軸承51。若凸輪50進行旋轉,則伴隨於此,可撓性軸承51一面使長軸的位置於圓周方向上位移,一面彎曲變形成橢圓狀。即,藉由凸輪50與可撓性軸承51來形成所謂的波動產生器。The cam 50 is arranged radially inward of the flexible externally toothed gear 40. The cam 50 is arranged coaxially with the rigid internal gear 30. The cam 50 of this embodiment has an oval cam profile. As will be described in detail later, the cam 50 rotates as the rotor 70 rotates. A flexible bearing 51 is provided on the radially outer side of the cam 50. When the cam 50 rotates, the flexible bearing 51 displaces the position of the long axis in the circumferential direction while bending, and deforms into an ellipse while bending. That is, the cam 50 and the flexible bearing 51 form a so-called wave generator.

定子60是電動機的定子。定子60於馬達外殼20的馬達筒狀部21的一側的端部的位置上,以無法相對於馬達筒狀部21的內周面旋轉的方式固定於馬達筒狀部21的內周面。更具體而言,定子60具有積層鋼板部63與底座部69。積層鋼板部63是將多個以中心軸C為中心的圓環狀的磁性體積層而成的積層結構體,且軸心部變成中空。底座部69是大致圓筒狀的部分。積層鋼板部63的內周部固定於底座部69的外周部。雖然於圖1中未圖示,但定子60具有多個線圈。各線圈於其磁芯變成與中心軸C平行的方向上,設置於定子60。定子60的底座部69於軸心部具有貫穿孔60a。於軸方向上觀察,貫穿孔60a的圓周面為圓形。The stator 60 is a stator of an electric motor. The stator 60 is fixed to the inner peripheral surface of the motor cylindrical portion 21 so as not to be rotatable with respect to the inner peripheral surface of the motor cylindrical portion 21 at the position of one end of the motor cylindrical portion 21 of the motor housing 20. More specifically, the stator 60 has a laminated steel plate portion 63 and a base portion 69. The laminated steel plate portion 63 is a laminated structure formed by a plurality of annular magnetic volume layers centered on the central axis C, and the axial center portion is hollow. The base portion 69 is a substantially cylindrical portion. The inner peripheral portion of the laminated steel plate portion 63 is fixed to the outer peripheral portion of the base portion 69. Although not shown in FIG. 1, the stator 60 has a plurality of coils. Each coil is provided on the stator 60 in a direction in which its magnetic core becomes parallel to the central axis C. The base portion 69 of the stator 60 has a through hole 60a in the axial center portion. When viewed in the axial direction, the circumferential surface of the through hole 60a is circular.

轉子70是電動機的轉子。轉子70配置於與定子60同軸上,以能夠相對於定子60旋轉的方式得到支持。更具體而言,轉子70具有旋轉軸71、圓板部72、以及磁鐵73。磁鐵73於軸方向上與所述定子60的線圈相向。即,本實施方式的定子60與轉子70形成所謂的軸向間隙(axial gap)型的電動機。The rotor 70 is a rotor of an electric motor. The rotor 70 is arranged coaxially with the stator 60 and is supported rotatably with respect to the stator 60. More specifically, the rotor 70 has a rotating shaft 71, a circular plate portion 72, and a magnet 73. The magnet 73 faces the coil of the stator 60 in the axial direction. That is, the stator 60 and the rotor 70 of the present embodiment form a so-called axial gap type motor.

旋轉軸71是於軸方向上延長的圓筒狀的部位。旋轉軸71***定子60的貫穿孔60a。滾珠軸承(第一軸承)61介於旋轉軸71的外周面與定子60的貫穿孔60a的圓周面之間。The rotating shaft 71 is a cylindrical portion extending in the axial direction. The rotating shaft 71 is inserted into the through hole 60 a of the stator 60. The ball bearing (first bearing) 61 is interposed between the outer circumferential surface of the rotating shaft 71 and the circumferential surface of the through hole 60 a of the stator 60.

圓板部72為圓板狀,於同軸上連接於旋轉軸71的軸方向的另一側。圓板部72的軸方向的另一側的板面與所述凸輪50的一側結合。於本實施方式中,圓板部72(轉子70)與凸輪50不使用緊固構件等,而作為一個旋轉構件來構成。若換一種說法,則圓板部72與凸輪50無法相對旋轉地連接於同軸上。如此,圓板部72由凸輪50的軸方向的一側與旋轉軸71的軸方向的另一側夾持,並與凸輪50及旋轉軸71結合。The circular plate portion 72 has a circular plate shape, and is coaxially connected to the other side of the rotating shaft 71 in the axial direction. The other plate surface of the circular plate portion 72 in the axial direction is coupled to one side of the cam 50. In this embodiment, the circular plate portion 72 (rotor 70) and the cam 50 are configured as one rotating member without using a fastening member or the like. To put it another way, the circular plate portion 72 and the cam 50 are connected to the coaxial axis so as not to rotate relatively. In this way, the circular plate portion 72 is sandwiched between one side in the axial direction of the cam 50 and the other side in the axial direction of the rotary shaft 71, and is coupled to the cam 50 and the rotary shaft 71.

磁鐵73固定於圓板部72的軸方向的一側的與定子60相向的板面。更具體而言,於圓板部72的軸方向的一側的板面上,在較旋轉軸71所在的部位更靠近徑向外側,磁鐵73沿著圓周方向固定於全周。磁鐵73的軸方向的一側的面變成N極與S極沿著圓周方向交替地排列的磁極面。The magnet 73 is fixed to the plate surface facing the stator 60 on the axial side of the circular plate portion 72. More specifically, on the plate surface on the axial direction side of the circular plate portion 72, the magnet 73 is fixed to the entire circumference along the circumferential direction on the radially outer side of the portion where the rotating shaft 71 is located. The surface on the one side in the axial direction of the magnet 73 becomes a magnetic pole surface in which N poles and S poles are alternately arranged in the circumferential direction.

輸出構件80是朝外部輸出減速後的旋轉的構件。輸出構件80具有圓板狀的被安裝部81與軸部82。被安裝部81為圓板狀,於軸心部形成貫穿孔81a。被安裝部81的軸方向的一側的端面與可撓性外齒齒輪40的安裝部42的軸方向的另一側的端面於同軸上重疊。於該狀態下,安裝部42與被安裝部81藉由多個緊固構件85而無法相對旋轉地結合。The output member 80 outputs a decelerated rotation to the outside. The output member 80 has a disk-shaped mounted portion 81 and a shaft portion 82. The to-be-attached portion 81 has a disk shape, and a through hole 81a is formed in the axial center portion. The end surface on the one side in the axial direction of the mounted portion 81 and the end surface on the other side in the axial direction of the mounting portion 42 of the flexible externally toothed gear 40 overlap coaxially. In this state, the mounting portion 42 and the mounted portion 81 are relatively non-rotatably coupled by the plurality of fastening members 85.

軸部82是自被安裝部81的軸方向的一側的端面朝一側延長的圓筒狀的部位。軸部82設置於與被安裝部81同軸上。軸部82於軸心部具有於軸方向上貫穿的貫穿孔82a。所述貫穿孔81a與該貫穿孔82a於軸方向上連續。軸部82的一側的端部***蓋部22的所述貫穿孔22a。若換一種說法,則形成於輸出構件80的軸心部的貫穿孔81a、貫穿孔82a沿著中心軸C貫穿驅動裝置100的中央部。The shaft portion 82 is a cylindrical portion extending from one end surface of the mounted portion 81 in the axial direction toward one side. The shaft portion 82 is provided coaxially with the mounted portion 81. The shaft portion 82 has a through hole 82a penetrating in the axial direction at the shaft center portion. The through hole 81a and the through hole 82a are continuous in the axial direction. The one end of the shaft portion 82 is inserted into the through hole 22 a of the cover portion 22. In other words, the through hole 81a and the through hole 82a formed in the axial center portion of the output member 80 penetrate the central portion of the drive device 100 along the central axis C.

於如以上般的構成的驅動裝置100中,若對定子60的線圈供給電流,則藉由定子60與磁鐵73之間的磁通的作用,而在定子60與轉子70之間產生圓周方向的扭矩。其結果,相對於定子60,轉子70環繞中心軸C進行旋轉。In the drive device 100 configured as described above, when current is supplied to the coils of the stator 60, the magnetic flux between the stator 60 and the magnet 73 generates a circumferential direction between the stator 60 and the rotor 70. Torque. As a result, the rotor 70 rotates around the central axis C relative to the stator 60.

若轉子70環繞中心軸C進行旋轉,則凸輪50與其成為一體亦進行旋轉。藉此,凸輪50的橢圓的長軸的位置於圓周方向上位移,伴隨於此,可撓性軸承51一面使長軸的位置於圓周方向上位移,一面彎曲變形成橢圓狀。於是,於所述橢圓的長軸的位置上,可撓性外齒齒輪40的外齒的背面由可撓性軸承51的外圈按壓,外齒41與內齒31咬合。此時,於所述橢圓的長軸的位置以外的相位位置上,外齒41與內齒31不咬合。即,外齒41與內齒31於180°旋轉對稱的兩個相位位置上,部分地咬合。伴隨凸輪50的旋轉,可撓性外齒齒輪40與可撓性軸承51的咬合位置以中心軸C為中心,於圓周方向上變化。此處,外齒41與內齒31的齒數不同,因此咬合位置每繞一周,相對於剛性內齒齒輪30,可撓性外齒齒輪40僅相對旋轉齒數差的部分。若可撓性外齒齒輪40進行旋轉,則安裝於該可撓性外齒齒輪40的安裝部42的輸出構件80亦以與可撓性外齒齒輪40相同的轉速進行旋轉。When the rotor 70 rotates around the central axis C, the cam 50 rotates as a unit with it. As a result, the position of the long axis of the ellipse of the cam 50 is displaced in the circumferential direction. Along with this, the flexible bearing 51 displaces the position of the long axis in the circumferential direction and bends to deform into an ellipse. Then, at the position of the long axis of the ellipse, the back surface of the external teeth of the flexible externally toothed gear 40 is pressed by the outer ring of the flexible bearing 51, and the external teeth 41 and the internal teeth 31 bite. At this time, at a phase position other than the position of the long axis of the ellipse, the external teeth 41 and the internal teeth 31 are not engaged. That is, the external teeth 41 and the internal teeth 31 partially engage at two phase positions 180° rotationally symmetric. As the cam 50 rotates, the engagement position of the flexible externally toothed gear 40 and the flexible bearing 51 changes in the circumferential direction around the central axis C. Here, since the number of teeth of the external teeth 41 and the internal teeth 31 are different, the flexible externally toothed gear 40 rotates only by a portion where the number of teeth differs with respect to the rigid internally toothed gear 30 every time the meshing position makes one turn. When the flexible externally toothed gear 40 rotates, the output member 80 attached to the mounting portion 42 of the flexible externally toothed gear 40 also rotates at the same rotational speed as the flexible externally toothed gear 40.

如此,於驅動裝置100中,於定子60及轉子70的部分所產生的作為機械能的旋轉藉由剛性內齒齒輪30、可撓性外齒齒輪40、及凸輪50的部分而大幅度地減速,減速後的旋轉被自輸出構件80中取出。In this way, in the drive device 100, the rotation as mechanical energy generated in the parts of the stator 60 and the rotor 70 is greatly decelerated by the parts of the rigid internal gear 30, the flexible external gear 40, and the cam 50 The decelerated rotation is taken out of the output member 80.

此外,於先前的驅動裝置中,電動機的部分與減速機的部分通常藉由隔離壁來隔開。藉由所述隔離壁來將電動機的部分與減速機的部分分隔,藉此阻止被供給至減速機的齒輪的咬合部分的潤滑油到達電動機的配置定子或磁鐵的區域為止。進而,先前通常是使軸承保持於如上所述的隔離壁的內周部,並經由該軸承來可旋轉地支持轉子的構成。但是,若將驅動裝置設為包括此種隔離壁的構成,則驅動裝置的軸方向的厚度變大,因此存在改善的餘地。尤其,當將驅動裝置應用於輔助服的關節部等時,現狀是要求更進一步的薄型化。In addition, in the previous driving device, the part of the motor and the part of the reducer are usually separated by a partition wall. The partition wall separates the portion of the motor from the portion of the reducer, thereby preventing the lubricating oil supplied to the nip portion of the gear of the reducer from reaching the area where the stator or magnet of the motor is arranged. Furthermore, in the past, the bearing is usually held at the inner peripheral portion of the partition wall as described above, and the rotor is rotatably supported via the bearing. However, if the drive device is configured to include such a partition wall, the thickness of the drive device in the axial direction becomes large, so there is room for improvement. In particular, when the driving device is applied to the joint portion of the auxiliary clothing, etc., the current situation is that further thinning is required.

關於該點,於本實施方式的驅動裝置100中,如圖1所示,內齒31與外齒41的咬合部於軸方向上隔著空間且與轉子70的圓板部72相向,而不被如先前般的隔離壁隔開。因此,可使驅動裝置100的軸方向的厚度僅變薄先前的隔離壁的厚度,並且亦可謀求輕量化。Regarding this point, in the drive device 100 of the present embodiment, as shown in FIG. 1, the engaging portion of the internal teeth 31 and the external teeth 41 is spaced in the axial direction and faces the circular plate portion 72 of the rotor 70 without It is separated by the partition wall as before. Therefore, the thickness of the drive device 100 in the axial direction can be reduced only by the thickness of the previous partition wall, and the weight can be reduced.

再者,於如本實施方式的驅動裝置100般設為去除了先前的隔離壁的構成的情況下,擔憂被供給至內齒31與外齒41的咬合部的潤滑油侵入配置定子60或磁鐵73的區域。關於該點,於本實施方式的驅動裝置100中,作為應對所述問題的措施,具有後述的特有的構成。In addition, in the case where the previous partition wall is removed like the drive device 100 of the present embodiment, there is a possibility that the lubricant supplied to the nip portion of the internal teeth 31 and the external teeth 41 may enter the stator 60 or the magnet. 73 area. Regarding this point, the drive device 100 of the present embodiment has a unique configuration to be described later as a countermeasure to the above-mentioned problem.

此外,於本實施方式的驅動裝置100中,於各部具有用於穩定地可旋轉地支持轉子70或輸出構件80的特有的構成。即,使先前的隔離壁以外的各部具有保持軸承的功能。In addition, in the drive device 100 of the present embodiment, each part has a unique structure for stably and rotatably supporting the rotor 70 or the output member 80. That is, each part other than the previous partition wall has a function of holding the bearing.

以下,對本實施方式的驅動裝置100中特有的構成進行詳細說明。Hereinafter, a structure unique to the drive device 100 of this embodiment will be described in detail.

如已述般,滾珠軸承61介於定子60的貫穿孔60a的圓周面與旋轉軸71的外周面之間。藉此,轉子70的旋轉軸71由定子60的內周部可旋轉地支持。其結果,與採用藉由馬達外殼20來可旋轉地支持轉子70的構成的情況相比,可使驅動裝置100於徑向上精簡化。As described above, the ball bearing 61 is interposed between the circumferential surface of the through hole 60 a of the stator 60 and the outer circumferential surface of the rotary shaft 71. With this, the rotating shaft 71 of the rotor 70 is rotatably supported by the inner peripheral portion of the stator 60. As a result, the drive device 100 can be simplified in the radial direction as compared with the case where the rotor 70 is rotatably supported by the motor housing 20.

進而,本實施方式的轉子70不僅由滾珠軸承61可旋轉地支持,亦由滾珠軸承(第二軸承)54可旋轉地支持。詳細而言,滾珠軸承54介於轉子70,更嚴格而言凸輪50的內周面與輸出構件80的軸部82的外周面之間。利用於軸方向上隔開距離的兩個滾珠軸承61、54來支持轉子70,藉此與僅利用一個滾珠軸承61來支持的情況相比,轉子70的旋轉穩定。Furthermore, the rotor 70 of the present embodiment is rotatably supported not only by the ball bearing 61 but also by the ball bearing (second bearing) 54. In detail, the ball bearing 54 is interposed between the rotor 70, more strictly speaking, the inner peripheral surface of the cam 50 and the outer peripheral surface of the shaft portion 82 of the output member 80. The rotor 70 is supported by two ball bearings 61 and 54 separated by a distance in the axial direction, whereby the rotation of the rotor 70 is stable compared to the case of being supported by only one ball bearing 61.

另外,於本實施方式的驅動裝置100中,於外殼10的軸方向的另一側的端部的位置上,交叉滾柱軸承83(第四軸承)介於外殼10的內周面與被安裝部81的外周面之間。交叉滾柱軸承83相對於外殼10,可旋轉地支持可撓性外齒齒輪40與輸出構件80結合而成者。藉由被安裝部81與交叉滾柱軸承83而自軸方向的另一側包覆可撓性外齒齒輪40。於本實施方式中,利用交叉滾柱軸承83來支持輸出構件80,藉此輸出構件80的旋轉穩定。In addition, in the drive device 100 of the present embodiment, at the position of the other end of the housing 10 in the axial direction, the crossed roller bearing 83 (fourth bearing) is interposed between the inner peripheral surface of the housing 10 and the mounted Between the outer peripheral surfaces of the portion 81. The cross roller bearing 83 rotatably supports the combination of the flexible externally toothed gear 40 and the output member 80 with respect to the housing 10. The flexible externally toothed gear 40 is covered by the attached portion 81 and the cross roller bearing 83 from the other side in the axial direction. In this embodiment, the output member 80 is supported by the cross roller bearing 83, whereby the rotation of the output member 80 is stabilized.

如圖1所示,連接部12於軸方向上與圓板部72的另一側的板面相向。連接部12配置於減速機的剛性內齒齒輪30的徑向外側。外殼10的連接部12的軸方向的一側的面具有凹凸部12a。本實施方式的凹凸部12a具有:朝軸方向的一側突出的圓環狀的多個凸部、及形成於在徑向上鄰接的凸部之間的圓環狀的凹部。若進行詳述,則於本實施方式的連接部12中,在徑向的兩個部位形成有凸部。該些凸部之中,徑向外側的凸部較徑向內側的凸部朝軸方向的一側延長得長。As shown in FIG. 1, the connecting portion 12 faces the other plate surface of the circular plate portion 72 in the axial direction. The connection portion 12 is arranged radially outward of the rigid internal gear 30 of the speed reducer. The surface of the connecting portion 12 of the housing 10 on the axial direction side has an uneven portion 12a. The concavo-convex portion 12a of the present embodiment includes a plurality of annular convex portions protruding toward one side in the axial direction, and an annular concave portion formed between the convex portions adjacent in the radial direction. As described in detail, in the connecting portion 12 of the present embodiment, convex portions are formed at two locations in the radial direction. Among these convex portions, the radially outer convex portion is longer than the radially inner convex portion toward the axial direction side.

於在軸方向上與形成有所述凹凸部12a的連接部12的一側的面相向的圓板部72的另一側的板面,形成凹凸部72a。若換一種說法,則圓板部72的板面之中,與配置磁鐵73之側相反側的板面具有凹凸部72a。將凹凸部72a設為與所述凹凸部12a互補的形狀。本實施方式的凹凸部72a具有:朝軸方向的另一側突出的圓環狀的多個凸部、及形成於在徑向上鄰接的凸部之間的圓環狀的凹部。若進行詳述,則於本實施方式的圓板部72中,在徑向的兩個部位形成有凸部。該些圓板部72側的凸部於相互之間夾持凹凸部12a中的徑向內側的凸部來配置。但是,連接部12的凹凸部12a的表面與圓板部72的凹凸部72a的表面不接觸。Concavo-convex portions 72a are formed on the other plate surface of the circular plate portion 72 that faces the one surface of the connecting portion 12 where the concavo-convex portions 12a are formed in the axial direction. To put it another way, among the plate surfaces of the circular plate portion 72, the plate surface opposite to the side where the magnet 73 is arranged has an uneven portion 72a. The uneven portion 72a has a shape complementary to the uneven portion 12a. The concavo-convex portion 72a of this embodiment includes a plurality of annular convex portions protruding toward the other side in the axial direction, and an annular concave portion formed between the convex portions adjacent in the radial direction. As described in detail, in the circular plate portion 72 of the present embodiment, convex portions are formed at two locations in the radial direction. The convex portions on the side of the circular plate portions 72 are arranged to sandwich the convex portions on the radially inner side of the uneven portions 12a. However, the surface of the concavo-convex portion 12a of the connecting portion 12 does not contact the surface of the concavo-convex portion 72a of the circular plate portion 72.

藉由如上所述的連接部12側的凹凸部12a與圓板部72側的凹凸部72a來形成所謂的迷宮(labyrinth)結構。藉此,阻止已被供給至內齒31與外齒41的咬合部的油脂等潤滑油自減速機的區域漏出而侵入電動機的區域。而且,由於連接部12側的凹凸部12a與圓板部72側的凹凸部72a不接觸,因此旋轉阻力小,轉子70的旋轉被阻礙之虞少。於本實施方式中,藉由所述構成,防止潤滑油自驅動裝置100中的減速機側的區域流出。The so-called labyrinth structure is formed by the uneven portion 12 a on the side of the connection portion 12 and the uneven portion 72 a on the side of the circular plate portion 72 as described above. This prevents the lubricant oil or the like that has been supplied to the nip portion of the internal teeth 31 and the external teeth 41 from leaking from the area of the speed reducer and entering the area of the motor. In addition, since the uneven portion 12a on the side of the connection portion 12 does not contact the uneven portion 72a on the side of the circular plate portion 72, the rotational resistance is small, and the rotation of the rotor 70 is less likely to be hindered. In the present embodiment, with the above-described configuration, the lubricating oil is prevented from flowing out from the area on the speed reducer side of the drive device 100.

如以上所示,於本實施方式的驅動裝置100中,內齒31與外齒41的咬合部於軸方向上隔著空間且與圓板部72的軸方向的另一側的板面相向。藉此,內齒31與外齒41的咬合部於軸方向上與轉子70的圓板部72相向,而不被如先前般的隔離壁隔開。因此,可使驅動裝置100的軸方向的厚度變薄,並且可謀求輕量化。As described above, in the drive device 100 of the present embodiment, the engaging portion of the internal teeth 31 and the external teeth 41 is spaced in the axial direction and faces the plate surface on the other side of the circular plate portion 72 in the axial direction. Thereby, the engaging portion of the internal teeth 31 and the external teeth 41 is opposed to the circular plate portion 72 of the rotor 70 in the axial direction without being separated by the partition wall as before. Therefore, the thickness of the drive device 100 in the axial direction can be reduced, and the weight can be reduced.

另外,本實施方式的驅動裝置100具有包含凸輪50與圓板部72的單一的旋轉構件。藉此,不需要用於將凸輪50與圓板部72結合的緊固構件,可使驅動裝置100的軸方向的厚度變得更薄。其結果,可使驅動裝置100進一步薄型化及輕量化。In addition, the drive device 100 of the present embodiment has a single rotating member including the cam 50 and the circular plate portion 72. Thereby, a fastening member for coupling the cam 50 and the circular plate portion 72 is unnecessary, and the thickness of the drive device 100 in the axial direction can be made thinner. As a result, the driving device 100 can be further reduced in thickness and weight.

另外,本實施方式的驅動裝置100包括滾珠軸承61作為第一軸承。藉此,可利用定子60的內周部來可旋轉地支持轉子70,而代替利用馬達外殼20來可旋轉地支持轉子70。其結果,可使驅動裝置100的徑向的尺寸小型化。另外,與將支持轉子70的軸承、及定子60配置於不同的軸方向位置的情況相比,可抑制驅動裝置100的軸方向的尺寸。In addition, the drive device 100 of the present embodiment includes a ball bearing 61 as the first bearing. Thereby, the rotor 70 can be rotatably supported by the inner peripheral portion of the stator 60 instead of the motor housing 20 to rotatably support the rotor 70. As a result, the radial size of the drive device 100 can be reduced. In addition, compared with the case where the bearing supporting the rotor 70 and the stator 60 are arranged at different axial positions, the size of the drive device 100 in the axial direction can be suppressed.

另外,如圖1所示,本實施方式的驅動裝置100於可撓性外齒齒輪40的徑向內側包括可旋轉地支持轉子70的滾珠軸承54作為第二軸承。藉此,轉子70由滾珠軸承61、及於軸方向與該滾珠軸承61分離的滾珠軸承54支持,因此可使轉子70的旋轉更穩定。另外,藉由將滾珠軸承54配置於可撓性外齒齒輪40的徑向內側,可有效活用空間,而使驅動裝置100進一步薄型化。In addition, as shown in FIG. 1, the drive device 100 of the present embodiment includes a ball bearing 54 that rotatably supports the rotor 70 as a second bearing on the radially inner side of the flexible externally toothed gear 40. Thereby, the rotor 70 is supported by the ball bearing 61 and the ball bearing 54 separated from the ball bearing 61 in the axial direction, so that the rotation of the rotor 70 can be stabilized. In addition, by arranging the ball bearing 54 on the radially inner side of the flexible externally toothed gear 40, the space can be effectively utilized, and the driving device 100 can be further thinned.

另外,本實施方式的驅動裝置100包括:具有被安裝部81及軸部82的輸出構件80、以及作為第四軸承的交叉滾柱軸承83。藉此,可將輸出構件80的被安裝部81如堵塞外殼10的另一側的開口的蓋般安裝,而可實現精簡的驅動裝置100。另外,利用外殼10的內周面來固定交叉滾柱軸承83,因此可將零件數抑制得少。進而,藉由將第四軸承設為交叉滾柱軸承83,可僅利用單一的軸承,於穩定的狀態下相對於外殼10支持輸出構件80。In addition, the drive device 100 of the present embodiment includes an output member 80 having a mounted portion 81 and a shaft portion 82, and a cross roller bearing 83 as a fourth bearing. With this, the mounted portion 81 of the output member 80 can be mounted like a cover that closes the opening on the other side of the housing 10, and a simplified drive device 100 can be realized. In addition, since the inner circumferential surface of the housing 10 is used to fix the cross roller bearing 83, the number of parts can be reduced. Furthermore, by using the fourth bearing as the cross roller bearing 83, it is possible to use only a single bearing to support the output member 80 with respect to the housing 10 in a stable state.

但是,本實施方式的驅動裝置100包括滾珠軸承54作為第五軸承。藉此,如圖1所示,滾珠軸承54配置於可撓性外齒齒輪40的徑向內側,因此可有效活用空間,而使驅動裝置100進一步薄型化。另外,滾珠軸承54具備可旋轉地支持的轉子70的功能,因此可抑制零件數。However, the drive device 100 of the present embodiment includes the ball bearing 54 as the fifth bearing. As a result, as shown in FIG. 1, the ball bearing 54 is disposed radially inward of the flexible externally toothed gear 40, so that the space can be effectively utilized, and the drive device 100 can be further thinned. In addition, since the ball bearing 54 has the function of the rotor 70 rotatably supported, the number of parts can be suppressed.

而且,本實施方式的驅動裝置100具有形成於連接部12側的凹凸部12a、及形成於圓板部72側的凹凸部72a,該些凹凸部形成所謂的迷宮式密封(labyrinth seal)。藉此,可防止已被填充至內齒31與外齒41的咬合部分的油脂等潤滑油到達配置磁鐵73或定子60的區域為止。另外,所述迷宮密封包含摩擦阻力少的不接觸的凹凸部12a、凹凸部72a,因此難以對驅動裝置100的電動機的性能產生不良影響。Furthermore, the driving device 100 of the present embodiment includes the uneven portion 12a formed on the connection portion 12 side and the uneven portion 72a formed on the circular plate portion 72 side, and these uneven portions form a so-called labyrinth seal. With this, it is possible to prevent lubricating oil, such as grease, that has been filled into the engagement portion between the internal teeth 31 and the external teeth 41 from reaching the area where the magnet 73 or the stator 60 is arranged. In addition, the labyrinth seal includes the non-contact uneven portion 12a and the uneven portion 72a with little friction resistance, and therefore it is difficult to adversely affect the performance of the motor of the drive device 100.

另外,於本實施方式的驅動裝置100中,連接部12側的凹凸部12a與圓板部72側的凹凸部72a設置為較內齒31與外齒41的咬合部更靠近徑向外側。藉此,取得如下的效果。即,伴隨驅動裝置100的驅動,油脂容易藉由離心力而朝徑向外側移動,於本實施方式中,於較塗佈油脂的咬合部分更靠近徑向外側形成有迷宮密封。因此,有效地阻止油脂的移動。In addition, in the driving device 100 of the present embodiment, the uneven portion 12 a on the connecting portion 12 side and the uneven portion 72 a on the circular plate portion 72 side are provided radially outward of the engaging portion of the internal teeth 31 and the external teeth 41. With this, the following effects are obtained. That is, as the driving device 100 is driven, the grease easily moves radially outward by centrifugal force. In this embodiment, a labyrinth seal is formed on the radially outer side of the grease-coated portion. Therefore, the movement of grease is effectively prevented.

另外,於本實施方式的驅動裝置100中,輸出構件80的軸部82的軸方向的一側的端部貫穿蓋部22。另外,被安裝部81及軸部82具有作為中空部的貫穿孔81a、貫穿孔82a。藉此,可使自定子60等延長的配線、或其他驅動裝置的配線穿過貫穿孔81a、貫穿孔82a。因此,即便於將驅動裝置100例如搭載於如機器人的關節部般的動作複雜的部分的情況下,亦可容易地進行配線的布置。In addition, in the drive device 100 of the present embodiment, the end of the shaft portion 82 of the output member 80 on the one side in the axial direction penetrates the cover portion 22. In addition, the mounted portion 81 and the shaft portion 82 have a through hole 81a and a through hole 82a as hollow portions. Thereby, the wiring extended from the stator 60 or the like, or the wiring of another drive device can be passed through the through hole 81a and the through hole 82a. Therefore, even when the drive device 100 is mounted, for example, on a part having a complicated motion like a joint of a robot, the wiring can be easily arranged.

<2.第二實施方式> 以下,參照圖3對第二實施方式的驅動裝置200進行說明。圖3是表示本實施方式的驅動裝置200的構成的縱剖面圖。再者,於以下的說明中,對構成及功能與所述實施方式中所示的構件相同的構件賦予相同的符號,並省略重覆說明。於以後的實施方式及變形例的說明中亦同樣如此。<2. Second embodiment> Hereinafter, the drive device 200 of the second embodiment will be described with reference to FIG. 3. FIG. 3 is a longitudinal cross-sectional view showing the configuration of the drive device 200 of this embodiment. In addition, in the following description, members having the same configuration and function as those shown in the above-mentioned embodiment are given the same symbols, and repeated explanations are omitted. This is the same in the description of the following embodiments and modification examples.

第二實施方式的驅動裝置200包括定子160來代替定子60。另外,包括轉子170來代替轉子70,並且包括第二轉子190作為追加的結構。另外,包括輸出構件180來代替輸出構件80。進而,包括滾珠軸承(第四軸承)183來代替交叉滾柱軸承83。第二實施方式的驅動裝置200主要於所述方面與第一實施方式的驅動裝置100不同。The drive device 200 of the second embodiment includes a stator 160 instead of the stator 60. In addition, the rotor 170 is included instead of the rotor 70, and the second rotor 190 is included as an additional structure. In addition, an output member 180 is included instead of the output member 80. Furthermore, a ball bearing (fourth bearing) 183 is included instead of the cross roller bearing 83. The drive device 200 of the second embodiment differs from the drive device 100 of the first embodiment mainly in the above points.

定子160是電動機的定子。定子160具有積層鋼板部163與底座部169。積層鋼板部163是將多個以中心軸C為中心的圓環狀的磁性體積層而成的積層結構體,且軸心部變成中空。定子160的積層鋼板部163以無法相對於馬達筒狀部21的內周面旋轉的方式固定於馬達筒狀部21的內周面。底座部169的外周部固定於積層鋼板部163的內周部。底座部169為大致圓筒狀,其內周部朝軸方向的一側及另一側這兩側延長。若換一種說法,則底座部169於軸心部具有圓筒狀的軸承保持部169a。The stator 160 is a stator of an electric motor. The stator 160 has a laminated steel plate portion 163 and a base portion 169. The laminated steel plate portion 163 is a laminated structure formed by a plurality of annular magnetic volume layers centered on the central axis C, and the axial center portion becomes hollow. The laminated steel plate portion 163 of the stator 160 is fixed to the inner circumferential surface of the motor cylindrical portion 21 so as not to rotate relative to the inner circumferential surface of the motor cylindrical portion 21. The outer peripheral portion of the base portion 169 is fixed to the inner peripheral portion of the laminated steel plate portion 163. The base portion 169 has a substantially cylindrical shape, and its inner peripheral portion extends toward one side and the other side in the axial direction. To put it another way, the base portion 169 has a cylindrical bearing holding portion 169a at the axis portion.

轉子170是電動機的轉子。轉子170配置於與定子160同軸上,以能夠相對於定子160旋轉的方式得到支持。更具體而言,轉子170具有旋轉軸171、圓板部72、以及磁鐵73。The rotor 170 is a rotor of an electric motor. The rotor 170 is arranged coaxially with the stator 160 and supported so as to be rotatable relative to the stator 160. More specifically, the rotor 170 has a rotating shaft 171, a circular plate portion 72, and a magnet 73.

旋轉軸171是自圓板部72的一側的板面朝軸方向的一側延長的圓柱狀的部位。旋轉軸171設置於與圓板部72同軸上。旋轉軸171於已***定子160的軸承保持部169a的狀態下,經由兩個滾珠軸承(第一軸承)61、61而以能夠相對於定子160旋轉的方式得到支持。兩個滾珠軸承61、61於軸方向上,並排配置於軸承保持部169a的徑向內側。The rotating shaft 171 is a cylindrical portion extending from the plate surface of the circular plate portion 72 toward the axial direction side. The rotating shaft 171 is provided coaxially with the circular plate portion 72. The rotating shaft 171 is supported rotatably with respect to the stator 160 via two ball bearings (first bearings) 61 and 61 in a state where the bearing holding portion 169 a of the stator 160 is inserted. The two ball bearings 61, 61 are arranged side by side in the radial direction inside the bearing holding portion 169a in the axial direction.

第二轉子190是與轉子170成對的轉子。第二轉子190具有圓板部92與磁鐵93。圓板部92為圓板狀,於同軸上連接於旋轉軸171的軸方向的一側的端部。第二轉子190的圓板部92於軸方向上,隔著定子160而配置於與第一轉子170的圓板部72相反側。於第二轉子190的圓板部92之中,與定子160的軸方向的一側相向的板面配置磁鐵93。即,定子160配置於在軸方向上隔開間隔來配置的兩個磁鐵73、93之間。The second rotor 190 is a rotor paired with the rotor 170. The second rotor 190 has a circular plate portion 92 and a magnet 93. The circular plate portion 92 has a circular plate shape, and is coaxially connected to an end portion of one side of the rotating shaft 171 in the axial direction. The circular plate portion 92 of the second rotor 190 is arranged on the opposite side to the circular plate portion 72 of the first rotor 170 via the stator 160 in the axial direction. In the circular plate portion 92 of the second rotor 190, the magnet 93 is disposed on the plate surface facing the axial direction side of the stator 160. That is, the stator 160 is arranged between the two magnets 73 and 93 arranged at intervals in the axial direction.

再者,於本實施方式中,轉子170的圓板部72的另一側的板面與凸輪50的一側的端面使用公知的緊固構件153來結合。緊固構件153例如可使用螺栓。Furthermore, in the present embodiment, the plate surface on the other side of the circular plate portion 72 of the rotor 170 and the end surface on one side of the cam 50 are coupled using a well-known fastening member 153. For the fastening member 153, for example, bolts can be used.

輸出構件180是朝外部輸出減速後的旋轉的構件。輸出構件180具有被安裝部81與軸部182。The output member 180 is a member that outputs the decelerated rotation to the outside. The output member 180 has a mounted portion 81 and a shaft portion 182.

軸部182是自被安裝部81的軸方向的一側的端面朝軸方向的一側延長的圓柱狀的部位。軸部182設置於與被安裝部81同軸上。軸部182的軸方向的一側的端部經由滾動軸承(第五軸承)54而***形成於凸輪50的軸心部的貫穿孔(省略圖示)。軸部182的軸方向的長度較第一實施方式的軸部82短。即,於外殼10及馬達外殼20的內部,軸部182與旋轉軸171在軸方向上並排配置。The shaft portion 182 is a cylindrical portion extending from the end surface on the axial direction side of the mounted portion 81 toward the axial direction side. The shaft portion 182 is provided coaxially with the mounted portion 81. The axial end of the shaft portion 182 is inserted into a through-hole (not shown) formed in the axial center portion of the cam 50 via a rolling bearing (fifth bearing) 54. The axial length of the shaft portion 182 is shorter than the shaft portion 82 of the first embodiment. That is, inside the housing 10 and the motor housing 20, the shaft portion 182 and the rotating shaft 171 are arranged side by side in the axial direction.

於如以上般的構成的驅動裝置200中,轉子170的旋轉軸171由在軸方向上並排的兩個滾珠軸承61支持。藉此,可使旋轉軸171的旋轉穩定。如圖1及圖3所示,於本實施方式的驅動裝置200中,各個滾珠軸承61雖然直徑較第一實施方式的滾珠軸承小,但由於使用一對滾珠軸承,因此可使轉子170的支持穩定。另外,藉由該構成,可使底座部169小徑化,因此可將定子160的線圈的卷線設定得寬。In the drive device 200 configured as described above, the rotating shaft 171 of the rotor 170 is supported by the two ball bearings 61 arranged side by side in the axial direction. Thereby, the rotation of the rotating shaft 171 can be stabilized. As shown in FIGS. 1 and 3, in the drive device 200 of the present embodiment, although each ball bearing 61 has a smaller diameter than the ball bearing of the first embodiment, since a pair of ball bearings is used, the rotor 170 can be supported stable. In addition, with this configuration, the diameter of the base portion 169 can be reduced, so that the coil winding of the stator 160 can be set wide.

另外,於本實施方式的驅動裝置200中,與第一實施方式相比,輸出構件180的軸線方向的長度變短。因此,即便不使用如交叉滾柱軸承83般的特殊的軸承,亦可藉由通常的兩個滾珠軸承183、54來使輸出構件180的支持穩定。In addition, in the drive device 200 of the present embodiment, the axial length of the output member 180 is shorter than that of the first embodiment. Therefore, even if a special bearing such as a cross roller bearing 83 is not used, the support of the output member 180 can be stabilized by the usual two ball bearings 183 and 54.

進而,於本實施方式的驅動裝置200中,於定子160的軸方向的另一側設置轉子170,進而於定子160的軸方向的一側亦設置第二轉子190,藉此可使由驅動裝置200所產生的旋轉扭矩變大。其結果,可藉由小型的驅動裝置200來輸出大的動力。Furthermore, in the driving device 200 of the present embodiment, the rotor 170 is provided on the other side of the stator 160 in the axial direction, and the second rotor 190 is also provided on one side of the stator 160 in the axial direction. The rotational torque generated by 200 becomes larger. As a result, large power can be output by the small drive device 200.

如以上所示,於本實施方式的驅動裝置200中,在軸方向上並排配置兩個作為第一軸承的滾珠軸承61。藉此,利用多個滾珠軸承61、61來支持轉子170的旋轉軸171,因此可使旋轉軸171的旋轉穩定。其結果,可抑制轉子170的振動,驅動裝置200的電動機的性能提昇。As described above, in the drive device 200 of the present embodiment, two ball bearings 61 as first bearings are arranged side by side in the axial direction. Thereby, the rotation shaft 171 of the rotor 170 is supported by the plurality of ball bearings 61, 61, so that the rotation of the rotation shaft 171 can be stabilized. As a result, the vibration of the rotor 170 can be suppressed, and the performance of the motor of the drive device 200 can be improved.

另外,本實施方式的驅動裝置200包括與轉子170成對的第二轉子190。藉此,藉由於定子160的兩側設置一對轉子170、190,可使由驅動裝置200所產生的旋轉扭矩變大。其結果,可將驅動裝置200作為強力的致動器。In addition, the drive device 200 of the present embodiment includes the second rotor 190 paired with the rotor 170. Accordingly, by providing a pair of rotors 170 and 190 on both sides of the stator 160, the rotational torque generated by the driving device 200 can be increased. As a result, the drive device 200 can be used as a powerful actuator.

<3.第三實施方式> 以下,參照圖4,對第三實施方式的驅動裝置300進行說明。圖4是表示本實施方式的驅動裝置300的構成的縱剖面圖。<3. Third embodiment> Hereinafter, the drive device 300 of the third embodiment will be described with reference to FIG. 4. FIG. 4 is a longitudinal cross-sectional view showing the configuration of the drive device 300 of this embodiment.

第三實施方式的驅動裝置300的馬達外殼20包括蓋部222來代替蓋部22。另外,包括轉子270來代替轉子70。此外,本實施方式的驅動裝置300附加地包括滾珠軸承(第三軸承)203及間隔構件205。第三實施方式的驅動裝置300主要於所述方面與第一實施方式的驅動裝置100及第二實施方式的驅動裝置200不同。The motor housing 20 of the drive device 300 of the third embodiment includes a cover 222 instead of the cover 22. In addition, the rotor 270 is included instead of the rotor 70. In addition, the drive device 300 of the present embodiment additionally includes a ball bearing (third bearing) 203 and a spacing member 205. The drive device 300 of the third embodiment differs from the drive device 100 of the first embodiment and the drive device 200 of the second embodiment mainly in the foregoing points.

蓋部222自軸方向的一側包覆定子60及第二轉子190。蓋部222具有:圓環狀的凸緣部222a、第一筒部222b、第一堵塞部222c、第二筒部222d、以及第二堵塞部222e。凸緣部222a與馬達筒狀部21的一側的端面重疊。藉由將公知的緊固構件***馬達筒狀部21與凸緣部222a,而將蓋部222連接於馬達筒狀部21的軸方向的一側。緊固構件例如可使用螺栓。The cover portion 222 covers the stator 60 and the second rotor 190 from one side in the axial direction. The lid portion 222 has an annular flange portion 222a, a first cylindrical portion 222b, a first blocking portion 222c, a second cylindrical portion 222d, and a second blocking portion 222e. The flange portion 222a overlaps with one end surface of the motor cylindrical portion 21. By inserting a well-known fastening member into the motor cylindrical portion 21 and the flange portion 222 a, the cover portion 222 is connected to one side of the motor cylindrical portion 21 in the axial direction. For the fastening member, for example, bolts can be used.

第一筒部222b是自凸緣部222a的內周部朝軸方向的一側延長的圓筒狀的部位。於第一筒部222b的徑向內側收容第二轉子190。第一堵塞部222c是自第一筒部222b的軸方向的一側的端部朝徑向內側擴展的圓環狀的部位。第一堵塞部222c的軸方向的另一側的面於軸方向上與第二轉子190的圓板部72相向。The first cylindrical portion 222b is a cylindrical portion extending from the inner peripheral portion of the flange portion 222a toward one side in the axial direction. The second rotor 190 is housed inside the first cylindrical portion 222b in the radial direction. The first blocking portion 222c is an annular portion that expands radially inward from the axial end of the first cylindrical portion 222b. The other surface of the first blocking portion 222c in the axial direction faces the circular plate portion 72 of the second rotor 190 in the axial direction.

第二筒部222d是自第一堵塞部222c的內周部朝軸方向的一側延長的圓筒狀的部位。於第二筒部222d的徑向內側大致收容後述的滾珠軸承203及間隔構件205。第二堵塞部222e是自第二筒部222d的軸方向的一側的端部朝徑向內側擴展的圓環狀的部位。於第二堵塞部222e的軸心部設置貫穿孔22a。輸出構件80的軸部82的一側的端部於貫穿孔22a中貫穿。The second cylindrical portion 222d is a cylindrical portion extending from the inner peripheral portion of the first blocking portion 222c toward one side in the axial direction. A ball bearing 203 and a spacing member 205 described later are substantially accommodated in the radial inner side of the second cylindrical portion 222d. The second blocking portion 222e is an annular portion that expands radially inward from the axial end of the second cylindrical portion 222d. A through hole 22a is provided in the axial center portion of the second blocking portion 222e. The one end of the shaft portion 82 of the output member 80 penetrates the through hole 22a.

轉子270的旋轉軸271是於軸方向上延長的圓筒狀的部位。本實施方式的旋轉軸271於軸方向上較第一實施方式的旋轉軸71長。於旋轉軸271的外周面的中途部形成有段差面271b,於滾珠軸承61的內圈的軸方向的另一側的端面已接觸該段差面271b的狀態下,將該滾珠軸承61搭載於馬達外殼20內。The rotating shaft 271 of the rotor 270 is a cylindrical portion extending in the axial direction. The rotating shaft 271 of this embodiment is longer in the axial direction than the rotating shaft 71 of the first embodiment. A stepped surface 271b is formed in the middle of the outer circumferential surface of the rotary shaft 271, and the ball bearing 61 is mounted on the motor in a state where the other end surface of the inner ring of the ball bearing 61 in the axial direction has contacted the stepped surface 271b. Inside the housing 20.

滾珠軸承203於軸方向上,隔著第二轉子190而配置於與滾珠軸承61相反側。滾珠軸承203的內圈嵌入旋轉軸271的軸方向的一側的端部。滾珠軸承203的外圈於已接觸第二筒部222d的內周面的狀態下,嵌入第二筒部222d內。藉由該構成,滾珠軸承203以能夠相對於馬達外殼20旋轉的方式來支持轉子270的旋轉軸271。The ball bearing 203 is arranged on the side opposite to the ball bearing 61 with the second rotor 190 in the axial direction. The inner ring of the ball bearing 203 is fitted into one end of the rotating shaft 271 in the axial direction. The outer ring of the ball bearing 203 is fitted into the second cylindrical portion 222d in a state where it has contacted the inner circumferential surface of the second cylindrical portion 222d. With this configuration, the ball bearing 203 supports the rotating shaft 271 of the rotor 270 so as to be rotatable with respect to the motor housing 20.

在滾珠軸承203的外圈的軸方向的一側的端面與第二堵塞部222e的軸方向的另一側的面之間,配置圓環狀的間隔構件205。藉由採用墊片(平墊圈)作為間隔構件205,可調整滾珠軸承61與第二轉子190之間、及第二轉子190與滾珠軸承203之間的間隙。藉此,可對包含滾珠軸承的各構件進行定位。An annular spacer member 205 is arranged between the end surface on the one axial side of the outer ring of the ball bearing 203 and the surface on the other axial side of the second blocking portion 222e. By using a washer (flat washer) as the spacing member 205, the gap between the ball bearing 61 and the second rotor 190 and between the second rotor 190 and the ball bearing 203 can be adjusted. With this, each member including the ball bearing can be positioned.

或者,藉由採用波形墊圈作為間隔構件205,可產生使滾珠軸承203朝轉子270、轉子190的圓板部72靠近的預壓。藉此,可抑制旋轉軸271的旋轉時的振動。Alternatively, by using a wave washer as the spacing member 205, it is possible to generate a preload that brings the ball bearing 203 closer to the rotor 270 and the disk portion 72 of the rotor 190. Thereby, the vibration when the rotating shaft 271 rotates can be suppressed.

於如以上般的構成的驅動裝置300中,轉子270除由滾珠軸承61可旋轉地支持以外,亦由在軸方向上與該滾珠軸承61隔開距離的滾珠軸承203可旋轉地支持。因此,可使轉子270的旋轉更穩定。此外,驅動裝置300包括間隔構件205,藉此可抑制轉子270的旋轉軸271的振動。In the drive device 300 configured as above, the rotor 270 is rotatably supported by the ball bearing 203 spaced apart from the ball bearing 61 in the axial direction in addition to the ball bearing 61. Therefore, the rotation of the rotor 270 can be made more stable. In addition, the driving device 300 includes the spacing member 205, whereby the vibration of the rotating shaft 271 of the rotor 270 can be suppressed.

進而,於本實施方式的驅動裝置300中,採用交叉滾柱軸承83作為第四軸承,並且省略作為第五軸承的滾珠軸承54。藉此,能夠以少的零件數使輸出構件80的旋轉穩定化。Furthermore, in the drive device 300 of the present embodiment, the cross roller bearing 83 is adopted as the fourth bearing, and the ball bearing 54 as the fifth bearing is omitted. With this, the rotation of the output member 80 can be stabilized with a small number of parts.

如以上所示,本實施方式的驅動裝置300包括滾珠軸承203作為第三軸承。藉此,轉子270由滾珠軸承61、及於軸方向上與該滾珠軸承61分離的滾珠軸承203支持。其結果,可使轉子270的旋轉進一步穩定化。另外,利用馬達外殼20的內周面來固定滾珠軸承203,因此可將零件數抑制得少。As described above, the drive device 300 of this embodiment includes the ball bearing 203 as the third bearing. Thereby, the rotor 270 is supported by the ball bearing 61 and the ball bearing 203 separated from the ball bearing 61 in the axial direction. As a result, the rotation of the rotor 270 can be further stabilized. In addition, since the ball bearing 203 is fixed by the inner circumferential surface of the motor housing 20, the number of parts can be reduced.

另外,本實施方式的驅動裝置300在滾珠軸承203的軸方向的一側的端面與蓋部222的軸方向的另一側的端面之間包括間隔構件205。藉此,例如藉由採用墊片作為間隔構件205,可調整包含滾珠軸承的構件間的間隙。其結果,可抑制旋轉軸271的振動,並可提昇驅動裝置300的電動機的性能。或者,藉由採用波形墊圈作為間隔構件205,可賦予使滾珠軸承203朝圓板部72靠近的壓力。藉此,亦可抑制旋轉軸271的振動,並可提昇驅動裝置300的電動機的性能。In addition, the drive device 300 of the present embodiment includes a spacing member 205 between the end surface of the ball bearing 203 on one side in the axial direction and the end surface of the cover portion 222 on the other side in the axial direction. Thereby, for example, by using a spacer as the spacer member 205, the gap between the members including the ball bearing can be adjusted. As a result, the vibration of the rotating shaft 271 can be suppressed, and the performance of the motor of the drive device 300 can be improved. Alternatively, by using a wave washer as the spacing member 205, pressure can be given to bring the ball bearing 203 closer to the circular plate portion 72. Thereby, the vibration of the rotating shaft 271 can also be suppressed, and the performance of the motor of the driving device 300 can be improved.

<4.第四實施方式> 以下,參照圖5,對第四實施方式的驅動裝置400進行簡單說明。圖5是表示第四實施方式的驅動裝置400的構成的縱剖面圖。<4. Fourth embodiment> Hereinafter, referring to FIG. 5, a driving device 400 according to the fourth embodiment will be briefly described. FIG. 5 is a longitudinal cross-sectional view showing the configuration of the drive device 400 of the fourth embodiment.

第四實施方式的驅動裝置400包括定子360來代替定子60。另外,包括轉子370來代替轉子70。本實施方式的定子360與輥370形成所謂的外轉子型的電動機。The drive device 400 of the fourth embodiment includes a stator 360 instead of the stator 60. In addition, the rotor 370 is included instead of the rotor 70. The stator 360 and the roller 370 of this embodiment form a so-called outer rotor type motor.

本實施方式的定子360具有積層鋼板部363與底座部369。底座部369為大致圓筒狀,軸方向的一側的端部與蓋部22連接。積層鋼板部363是將多個以中心軸C為中心的圓環狀的磁性體積層而成的積層結構體,且軸心部變成中空。積層鋼板部363的內周部無法相對旋轉地固定於底座部369的外周部。另外,定子360具有多個線圈365。線圈365安裝於積層鋼板部363。The stator 360 of this embodiment has a laminated steel plate portion 363 and a base portion 369. The base portion 369 is substantially cylindrical, and one end in the axial direction is connected to the cover portion 22. The laminated steel plate portion 363 is a laminated structure formed by a plurality of annular magnetic volume layers centered on the central axis C, and the axial center portion becomes hollow. The inner peripheral portion of the laminated steel plate portion 363 is fixed to the outer peripheral portion of the base portion 369 so as not to rotate relatively. In addition, the stator 360 has a plurality of coils 365. The coil 365 is attached to the laminated steel plate portion 363.

轉子370具有圓板部372、磁鐵保持部372a、以及磁鐵373。圓板部372是圓環狀的板狀部位。圓板部273設置於與定子360同軸上。圓板部372的軸方向的一側的板面於軸方向上與定子360的積層鋼板部363相向。圓板部372的軸方向的另一側的板面與凸輪50的軸方向的一側的端面結合。藉此,轉子370與凸輪50以相同的轉速進行旋轉。The rotor 370 has a disc portion 372, a magnet holding portion 372a, and a magnet 373. The circular plate portion 372 is a circular plate-shaped portion. The circular plate portion 273 is provided coaxially with the stator 360. The plate surface on the axial direction of the circular plate portion 372 faces the laminated steel plate portion 363 of the stator 360 in the axial direction. The plate surface on the other side in the axial direction of the circular plate portion 372 is coupled to the end surface on one side in the axial direction of the cam 50. As a result, the rotor 370 and the cam 50 rotate at the same rotation speed.

磁鐵保持部372a為圓筒狀,自圓板部372的外周緣部朝軸方向的一側延長。於磁鐵保持部372a的內周面固定磁鐵373。磁鐵373於徑向上與定子360相向。磁鐵373的內周面變成N極與S極沿著圓周方向交替地排列的磁極面。The magnet holding portion 372a is cylindrical, and extends from the outer peripheral edge portion of the circular plate portion 372 toward one side in the axial direction. The magnet 373 is fixed to the inner peripheral surface of the magnet holding portion 372a. The magnet 373 faces the stator 360 in the radial direction. The inner circumferential surface of the magnet 373 becomes a magnetic pole surface in which N poles and S poles are alternately arranged in the circumferential direction.

本實施方式的旋轉軸71與凸輪50的軸方向的一側的端面連接,而代替與圓板部372的軸方向的一側的板面連接。即,旋轉軸71自凸輪50的軸方向的一側的端面起於軸方向上延長。在旋轉軸71的外周面與底座部369的內周面之間,於軸方向上並排設置有多個滾珠軸承(第一軸承)61、61。The rotating shaft 71 of the present embodiment is connected to the end surface of the cam 50 on the axial side instead of being connected to the plate surface on the axial side of the circular plate portion 372. That is, the rotating shaft 71 extends in the axial direction from the end surface of the cam 50 on the axial direction side. Between the outer peripheral surface of the rotating shaft 71 and the inner peripheral surface of the base portion 369, a plurality of ball bearings (first bearings) 61 and 61 are arranged side by side in the axial direction.

如圖5所示,於本實施方式中,內齒31與外齒41的咬合部亦於軸方向上隔著空間且與轉子370的圓板部372相向。因此,可使驅動裝置400的軸方向的厚度薄型化,並且可謀求輕量化。尤其,於本實施方式中,定子360與磁鐵373於徑向上相向,因此與在軸方向上相向來配置的情況相比,存在可使軸方向的尺寸變得更薄的餘地。As shown in FIG. 5, in this embodiment, the engagement portion of the internal teeth 31 and the external teeth 41 also faces the circular plate portion 372 of the rotor 370 with a space in the axial direction. Therefore, the thickness of the drive device 400 in the axial direction can be reduced, and the weight can be reduced. In particular, in the present embodiment, the stator 360 and the magnet 373 face each other in the radial direction. Therefore, compared with the case where they are arranged facing each other in the axial direction, there is room for making the size in the axial direction thinner.

<5.第五實施方式> 以下,參照圖6,對第五實施方式的驅動裝置500進行簡單說明。圖6是表示第五實施方式的驅動裝置500的構成的縱剖面圖。<5. Fifth embodiment> Hereinafter, referring to FIG. 6, a driving device 500 according to the fifth embodiment will be briefly described. FIG. 6 is a longitudinal cross-sectional view showing the configuration of the drive device 500 of the fifth embodiment.

第五實施方式的驅動裝置500包括定子460來代替定子60。另外,包括轉子470來代替轉子70。本實施方式的定子460與轉子470形成所謂的內轉子型的電動機。The drive device 500 of the fifth embodiment includes a stator 460 instead of the stator 60. In addition, the rotor 470 is included instead of the rotor 70. The stator 460 and the rotor 470 of this embodiment form a so-called inner rotor type motor.

本實施方式的定子460是將多個以中心軸C為中心的圓環狀的磁性體積層而成的積層結構體,且軸心部變成中空。本實施方式的定子460不包括底座部。定子460的外周面無法相對旋轉地固定於馬達筒狀部21的內周面。另外,定子460具有多個線圈465。The stator 460 of the present embodiment is a laminated structure formed by a plurality of annular magnetic volume layers centered on the central axis C, and the axial center portion becomes hollow. The stator 460 of this embodiment does not include a base part. The outer circumferential surface of the stator 460 is fixed to the inner circumferential surface of the motor cylindrical portion 21 so as not to rotate relatively. In addition, the stator 460 has a plurality of coils 465.

轉子470具有圓板部472、磁鐵保持部474、以及磁鐵473。圓板部472是圓環狀的板狀部位。圓板部472設置於與定子460同軸上。圓板部472的軸方向的一側的板面於軸方向上與定子460相向。圓板部472的軸方向的另一側的板面與凸輪50的軸方向的一側的端面結合。藉此,轉子470與凸輪50以相同的轉速進行旋轉。The rotor 470 has a disc portion 472, a magnet holding portion 474, and a magnet 473. The circular plate portion 472 is a circular plate-shaped portion. The circular plate portion 472 is provided coaxially with the stator 460. The plate surface of one side of the circular plate portion 472 in the axial direction faces the stator 460 in the axial direction. The plate surface on the other side in the axial direction of the circular plate portion 472 is coupled to the end surface on the one side in the axial direction of the cam 50. As a result, the rotor 470 and the cam 50 rotate at the same rotation speed.

磁鐵保持部474為圓筒狀,自圓板部472的內周緣部朝軸方向的一側延長。於磁鐵保持部474的外周面固定磁鐵473。磁鐵473於徑向上與定子460相向。磁鐵473的外周面變成N極與S極沿著圓周方向交替地排列的磁極面。The magnet holding portion 474 has a cylindrical shape, and extends from the inner peripheral edge portion of the circular plate portion 472 toward one side in the axial direction. The magnet 473 is fixed to the outer peripheral surface of the magnet holding portion 474. The magnet 473 faces the stator 460 in the radial direction. The outer peripheral surface of the magnet 473 becomes a magnetic pole surface in which N poles and S poles are alternately arranged in the circumferential direction.

本實施方式的旋轉軸71與凸輪50的軸方向的一側的端面連接,而代替與圓板部472的軸方向的一側的板面連接。即,旋轉軸71自凸輪50的軸方向的一側的端面起於軸方向上延長。在旋轉軸71的內周面與輸出構件80的軸部82的外周面之間,於軸方向上隔開距離而設置有滾珠軸承54、54。滾珠軸承54、54兼具作為第二軸承的功能與作為第五軸承的功能。The rotating shaft 71 of the present embodiment is connected to the end surface of the cam 50 on one side in the axial direction instead of being connected to the plate surface on one side of the circular plate portion 472 in the axial direction. That is, the rotating shaft 71 extends in the axial direction from the end surface of the cam 50 on the axial direction side. Ball bearings 54 and 54 are provided between the inner peripheral surface of the rotating shaft 71 and the outer peripheral surface of the shaft portion 82 of the output member 80 at a distance in the axial direction. The ball bearings 54 and 54 have a function as a second bearing and a function as a fifth bearing.

如圖6所示,於本實施方式中,內齒31與外齒41的咬合部亦於軸方向上隔著空間且與轉子470的圓板部472相向。因此,可使驅動裝置500的厚度薄型化,並且可謀求輕量化。尤其,於本實施方式中,定子460與磁鐵473於徑向上相向,因此與在軸方向上相向來配置的情況相比,存在可使軸方向的尺寸變得更薄的餘地。As shown in FIG. 6, in this embodiment, the engaging portion of the internal teeth 31 and the external teeth 41 also faces the circular plate portion 472 of the rotor 470 with a space in the axial direction. Therefore, the thickness of the driving device 500 can be reduced, and the weight can be reduced. In particular, in the present embodiment, the stator 460 and the magnet 473 face each other in the radial direction. Therefore, compared with the case where they are arranged facing each other in the axial direction, there is room for making the size in the axial direction thinner.

<6.其他變形例> 以上,對本發明的例示性的實施方式進行了說明,但本發明並不限定於所述實施方式。<6. Other modifications> The exemplary embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments.

於所述實施方式中,連接部12與筒狀部11的軸方向的一側的端部連接,但連接部亦可與馬達筒狀部21的軸方向的另一側的端部連接來加以代替。即,連接部可屬於外殼與馬達外殼的任一者。In the above-described embodiment, the connecting portion 12 is connected to the end of one side of the cylindrical portion 11 in the axial direction, but the connecting portion may also be connected to the end of the other side of the motor cylindrical portion 21 in the axial direction. instead. That is, the connection portion may belong to any one of the housing and the motor housing.

於所述第二實施方式中,連接部12側的凹凸部12a包括兩個凸部與一個凹部,另外,圓板部72側的凹凸部72a包括兩個凸部與一個凹部。但是,亦可增減凸部及凹部的數量來加以代替。或者,亦可於連接部12側或圓板部72側包括V形密封圈來代替凹凸部12a、凹凸部72a。In the second embodiment, the concave-convex portion 12a on the connecting portion 12 side includes two convex portions and one concave portion, and the concave-convex portion 72a on the circular plate portion 72 side includes two convex portions and one concave portion. However, the number of convex portions and concave portions may be increased or decreased instead. Alternatively, a V-shaped seal ring may be included on the connecting portion 12 side or the disc portion 72 side instead of the uneven portion 12a and the uneven portion 72a.

於所述第三實施方式中,亦可將多個間隔構件205於軸方向上重疊後配置在滾珠軸承203與第二堵塞部222e之間。藉此,可精細地調整間隙量、或調整預壓的大小。In the third embodiment, a plurality of spacer members 205 may be stacked between the ball bearing 203 and the second blocking portion 222e after being stacked in the axial direction. Thereby, the amount of clearance or the size of preload can be adjusted finely.

於所述實施方式中,將可撓性外齒齒輪40設為杯型,但亦可設為大禮帽(silk hat)型來加以代替。即,安裝部亦可自可撓性外齒齒輪的軸方向的另一側的端部朝徑向外側延長。而且,亦可於該安裝部安裝輸出構件80。In the above-mentioned embodiment, the flexible externally toothed gear 40 is set to a cup shape, but it may be replaced by a silk hat type. That is, the attachment portion may extend radially outward from the other end in the axial direction of the flexible externally toothed gear. Furthermore, the output member 80 may be attached to the attachment portion.

另外,關於驅動裝置100(200、300)的細微部分的構成,例如齒輪的齒數或緊固構件的安裝位置等,亦可與本申請案的各圖中所示者不同。另外,亦可於不產生矛盾的範圍內,將所述實施方式或變形例中出現的各元件適宜組合。 [產業上之可利用性]In addition, the configuration of fine parts of the drive device 100 (200, 300), for example, the number of teeth of the gear or the mounting position of the fastening member, may be different from those shown in the drawings of the present application. In addition, each element appearing in the above-described embodiment or modification may be appropriately combined within a range that does not cause conflicts. [Industry availability]

本申請案可用於驅動裝置。This application can be used for drive devices.

10:外殼 11:筒狀部 12:連接部 12a、72a:凹凸部 20:馬達外殼 21:馬達筒狀部 22、222:蓋部 22a、60a:貫穿孔 30:剛性內齒齒輪 31:內齒 40:可撓性外齒齒輪 41:外齒 42:安裝部 50:凸輪 51:可撓性軸承 54:滾珠軸承(第二軸承、第五軸承) 60、160、360、460:定子 61:滾珠軸承(第一軸承) 63、163、363:積層鋼板部 69、169、369:底座部 70、270、370、470:轉子 71、171、271:旋轉軸 72、92、372、472:圓板部 73、93、373、473:磁鐵 80、180:輸出構件 81:被安裝部 81a、82a:貫穿孔(中空部) 82、182:軸部 83:交叉滾柱軸承(第四軸承) 85、153:緊固構件 100、200、300、400、500:驅動裝置 169a:軸承保持部 170:轉子(第一轉子) 183:滾珠軸承(第四軸承) 190:轉子(第二轉子) 203:滾珠軸承(第三軸承) 205:間隔構件 222a:凸緣部 222b:第一筒部 222c:第一堵塞部 222d:第二筒部 222e:第二堵塞部 271b:段差面 365、465:線圈 372a、474:磁鐵保持部 C:中心軸 10: Shell 11: cylindrical part 12: Connection 12a, 72a: uneven part 20: Motor housing 21: Motor barrel 22, 222: cover 22a, 60a: through hole 30: Rigid internal gear 31: Internal tooth 40: Flexible external gear 41: external teeth 42: Installation Department 50: cam 51: Flexible bearings 54: Ball bearing (second bearing, fifth bearing) 60, 160, 360, 460: stator 61: Ball bearing (first bearing) 63, 163, 363: Laminated steel plate department 69, 169, 369: base part 70, 270, 370, 470: rotor 71, 171, 271: rotation axis 72, 92, 372, 472: circular plate part 73, 93, 373, 473: magnet 80, 180: output component 81: Installed part 81a, 82a: through hole (hollow part) 82, 182: Shaft 83: Crossed roller bearing (fourth bearing) 85, 153: fastening member 100, 200, 300, 400, 500: driving device 169a: Bearing holding part 170: rotor (first rotor) 183: Ball bearing (fourth bearing) 190: rotor (second rotor) 203: Ball bearing (third bearing) 205: spacer 222a: Flange 222b: the first barrel 222c: The first blockage 222d: Second cylinder 222e: second blockage 271b: Segment difference surface 365, 465: coil 372a, 474: magnet holder C: central axis

圖1是表示第一實施方式的驅動裝置的構成的縱剖面圖。圖2是圖1中的II-II線剖面圖,表示咬合部的情況。圖3是表示第二實施方式的驅動裝置的構成的縱剖面圖。圖4是表示第三實施方式的驅動裝置的構成的縱剖面圖。圖5是表示第四實施方式的驅動裝置的構成的縱剖面圖。 圖6是表示第五實施方式的驅動裝置的構成的縱剖面圖。FIG. 1 is a longitudinal cross-sectional view showing the configuration of the drive device of the first embodiment. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1 and shows the state of the nip portion. 3 is a vertical cross-sectional view showing the configuration of the drive device of the second embodiment. 4 is a longitudinal cross-sectional view showing the configuration of a drive device of a third embodiment. 5 is a longitudinal cross-sectional view showing the configuration of the drive device of the fourth embodiment. 6 is a longitudinal cross-sectional view showing the configuration of the drive device of the fifth embodiment.

10:外殼 10: Shell

11:筒狀部 11: cylindrical part

12:連接部 12: Connection

12a、72a:凹凸部 12a, 72a: uneven part

20:馬達外殼 20: Motor housing

21:馬達筒狀部 21: Motor barrel

22:蓋部 22: Cover

22a、60a:貫穿孔 22a, 60a: through hole

30:剛性內齒齒輪 30: Rigid internal gear

40:可撓性外齒齒輪 40: Flexible external gear

42:安裝部 42: Installation Department

50:凸輪 50: cam

51:可撓性軸承 51: Flexible bearings

54:滾珠軸承(第二軸承、第五軸承) 54: Ball bearing (second bearing, fifth bearing)

60:定子 60: stator

61:滾珠軸承(第一軸承) 61: Ball bearing (first bearing)

63:積層鋼板部 63: Laminated steel plate department

69:底座部 69: Base part

70:轉子 70: rotor

71:旋轉軸 71: Rotating axis

72:圓板部 72: circular plate

73:磁鐵 73: Magnet

80:輸出構件 80: output component

81:被安裝部 81: Installed part

81a、82a:貫穿孔(中空部) 81a, 82a: through hole (hollow part)

82:軸部 82: Shaft

83:交叉滾柱軸承(第四軸承) 83: Crossed roller bearing (fourth bearing)

85:緊固構件 85: fastening member

100:驅動裝置 100: Drive

C:中心軸 C: central axis

Claims (15)

一種驅動裝置,包括: 筒狀的外殼,於軸方向上延長;電動機,被收容於所述外殼的軸方向的一側;以及減速機,被收容於所述外殼的軸方向的另一側;所述減速機包含:圓環狀的剛性內齒齒輪,以無法相對於所述外殼的內周面旋轉的方式固定於所述外殼的所述內周面,且所述剛性內齒齒輪於內周部具有內齒;可撓性的環狀的可撓性外齒齒輪,配置於所述剛性內齒齒輪的徑向內側,於所述軸方向的所述一側的外周部具有齒數與所述內齒不同的外齒,於所述軸方向的所述另一側具有能夠安裝輸出構件的安裝部;以及非真圓狀的凸輪,配置於所述可撓性外齒齒輪的徑向內側,藉由進行旋轉來使所述可撓性外齒齒輪的所述外周部於徑向上彎曲變形,而使所述內齒與所述外齒部分地咬合;所述電動機包含:圓板狀的定子,以無法相對於所述外殼旋轉的方式固定於所述外殼,且所述定子於軸心部具有貫穿孔;以及轉子,以能夠相對於所述定子旋轉的方式得到支持;所述轉子包含:旋轉軸,***所述定子的所述貫穿孔;板狀的圓板部,由所述凸輪的所述軸方向的所述一側與所述旋轉軸的所述軸方向的所述另一側夾持,並與所述凸輪及所述旋轉軸結合;以及磁鐵,固定於所述圓板部的一部分;且所述內齒與所述外齒的咬合部於所述軸方向上隔著空間且與所述圓板部的所述軸方向的所述另一側的板面相向。A driving device, including: A cylindrical casing extending in the axial direction; a motor, which is housed on one side of the casing in the axial direction; and a speed reducer, which is housed in the other side of the casing in the axial direction; the speed reducer includes: A ring-shaped rigid internally toothed gear is fixed to the inner peripheral surface of the housing so as not to rotate relative to the inner peripheral surface of the housing, and the rigid internally toothed gear has internal teeth at the inner peripheral portion; A flexible ring-shaped flexible externally toothed gear is disposed radially inward of the rigid internally toothed gear, and the outer peripheral portion on the one side in the axial direction has an outer number of teeth different from the internal teeth Teeth, on the other side in the axial direction, has a mounting portion capable of mounting an output member; and a non-circular cam, which is arranged radially inward of the flexible externally toothed gear, by rotating Bending the outer peripheral portion of the flexible externally toothed gear in the radial direction to partially engage the internal teeth and the external teeth; the motor includes a disc-shaped stator The casing is fixed to the casing in a rotatable manner, and the stator has a through hole in an axis portion; and a rotor is supported to be rotatable relative to the stator; the rotor includes: a rotation shaft, which is inserted into The through hole of the stator; a plate-shaped disc portion sandwiched between the one side of the cam in the axial direction and the other side of the rotary shaft in the axial direction, and The cam and the rotating shaft are combined; and the magnet is fixed to a part of the circular plate portion; and the engaging portion of the internal tooth and the external tooth is spaced apart from the circle in the axial direction with a space The other plate surface of the plate portion in the axial direction faces each other. 如申請專利範圍第1項所述的驅動裝置,包括單一的旋轉構件,所述旋轉構件包含所述凸輪與所述圓板部。The drive device according to item 1 of the patent application scope includes a single rotating member including the cam and the circular plate portion. 如申請專利範圍第1項或第2項所述的驅動裝置,更包括配置於所述定子的所述貫穿孔的內周面與所述旋轉軸的外周面之間的第一軸承。The drive device according to item 1 or 2 of the patent application further includes a first bearing disposed between the inner peripheral surface of the through hole of the stator and the outer peripheral surface of the rotating shaft. 如申請專利範圍第3項所述的驅動裝置,包括於所述軸方向上並排配置的多個所述第一軸承。The drive device according to item 3 of the patent application scope includes a plurality of the first bearings arranged side by side in the axis direction. 如申請專利範圍第3項或第4項所述的驅動裝置,包括第二軸承,所述第二軸承於所述可撓性外齒齒輪的所述徑向內側,以所述轉子能夠旋轉的方式支持所述轉子。The drive device according to item 3 or item 4 of the patent application scope includes a second bearing, the second bearing is on the radially inner side of the flexible externally toothed gear, so that the rotor can rotate Way to support the rotor. 如申請專利範圍第3項至第5項中任一項所述的驅動裝置,包括配置於所述外殼的所述內周面與所述旋轉軸的所述外周面之間的第三軸承。The drive device according to any one of claims 3 to 5 includes a third bearing disposed between the inner peripheral surface of the housing and the outer peripheral surface of the rotating shaft. 如申請專利範圍第1項至第6項中任一項所述的驅動裝置,包括: 所述輸出構件,具有安裝於所述安裝部的圓板狀的被安裝部、及自所述被安裝部朝所述軸方向的所述一側延長的軸部;以及第四軸承,配置於所述外殼的所述內周面與所述被安裝部的外周面之間。The driving device according to any one of the first to sixth patent application scopes includes: The output member has a disk-shaped mounted portion that is mounted on the mounting portion, and a shaft portion that extends from the mounted portion toward the one side in the axial direction; and a fourth bearing is disposed on Between the inner peripheral surface of the housing and the outer peripheral surface of the mounted portion. 如申請專利範圍第7項所述的驅動裝置,更包括配置於所述凸輪的內周面與所述軸部的外周面之間的第五軸承。The drive device according to item 7 of the patent application scope further includes a fifth bearing disposed between the inner peripheral surface of the cam and the outer peripheral surface of the shaft portion. 如申請專利範圍第1項至第8項中任一項所述的驅動裝置,其中所述外殼包括圓環形狀的板狀的連接部,所述連接部與所述圓板部的所述軸方向的所述另一側的所述板面相向,並且配置於所述減速機的徑向外側,且 於所述連接部的所述軸方向的所述一側的面、及與所述面相向的所述圓板部的所述軸方向的所述另一側的所述板面分別形成互補的凹凸部。The driving device according to any one of the first to eighth patent applications, wherein the housing includes a circular plate-shaped connecting portion, the connecting portion and the shaft of the circular plate portion The plate surfaces on the other side of the direction face each other and are arranged radially outward of the reducer, and The surface on the one side in the axial direction of the connecting portion and the plate surface on the other side in the axial direction of the circular plate portion facing the surface respectively form complementary Concavo-convex. 如申請專利範圍第6項所述的驅動裝置,其中所述外殼更包括與所述外殼的所述軸方向的所述一側連接,而自所述軸方向的所述一側包覆所述定子的蓋部,且 在所述第三軸承與所述蓋部的所述軸方向的所述另一側的面之間包括間隔構件。The driving device according to item 6 of the patent application range, wherein the housing further includes a connection with the one side of the housing in the axial direction, and the one side from the shaft direction covers the The cover of the stator, and A spacer member is included between the third bearing and the other surface of the cover portion in the axial direction. 如申請專利範圍第7項所述的驅動裝置,其中所述外殼更包括與所述外殼的所述軸方向的所述一側連接,而自所述軸方向的所述一側包覆所述定子的蓋部, 所述軸部的所述軸方向的所述一側的端部貫穿所述蓋部,且所述被安裝部及所述軸部具有於所述軸方向上貫穿的中空部。The driving device according to item 7 of the patent application scope, wherein the housing further includes a connection with the one side of the housing in the axial direction, and the one side from the shaft direction covers the The cover of the stator, An end portion of the shaft portion on the one side in the axial direction penetrates the cover portion, and the mounted portion and the shaft portion have a hollow portion penetrating in the axial direction. 如申請專利範圍第1項至第11項中任一項所述的驅動裝置,其中所述磁鐵固定於所述圓板部的所述軸方向的所述一側的所述板面,所述板面在所述軸方向上與所述定子相向。The drive device according to any one of claims 1 to 11, wherein the magnet is fixed to the plate surface on the one side in the axial direction of the circular plate portion, the The plate surface faces the stator in the axial direction. 如申請專利範圍第12項所述的驅動裝置,更包括第二轉子,所述第二轉子於所述軸方向上隔著所述定子而配置於與所述轉子相反側,並且與所述轉子成對。The drive device according to item 12 of the patent application scope further includes a second rotor, which is disposed on the opposite side to the rotor in the axial direction with the stator interposed therebetween In pairs. 如申請專利範圍第1項至第11項中任一項所述的驅動裝置,其中所述磁鐵固定於自前期圓板部的徑向的外側緣部朝所述軸方向的所述一側延長的圓筒部的內周面,且 所述定子的外周面與所述磁鐵在徑向上相向。The drive device according to any one of the first to eleventh patent application ranges, wherein the magnet is fixed to extend from the radially outer edge portion of the previous disk portion toward the one side in the axial direction The inner circumferential surface of the cylindrical portion, and The outer circumferential surface of the stator and the magnet face each other in the radial direction. 如申請專利範圍第1項至第11項中任一項所述的驅動裝置,其中所述磁鐵固定於所述旋轉軸的徑向外側,且 所述定子的內周面與所述磁鐵在徑向上相向。The driving device according to any one of the first to eleventh items in the patent application range, wherein the magnet is fixed to the radially outer side of the rotating shaft, and The inner circumferential surface of the stator and the magnet face each other in the radial direction.
TW108131583A 2018-09-03 2019-09-03 Drive device TWI728450B (en)

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