WO2015019420A1 - 回転アクチュエーターおよび波動歯車減速機ユニット - Google Patents
回転アクチュエーターおよび波動歯車減速機ユニット Download PDFInfo
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- WO2015019420A1 WO2015019420A1 PCT/JP2013/071271 JP2013071271W WO2015019420A1 WO 2015019420 A1 WO2015019420 A1 WO 2015019420A1 JP 2013071271 W JP2013071271 W JP 2013071271W WO 2015019420 A1 WO2015019420 A1 WO 2015019420A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H49/00—Other gearings
- F16H49/001—Wave gearings, e.g. harmonic drive transmissions
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- the present invention relates to a rotary actuator provided with a wave gear reducer unit and a motor. More specifically, the present invention relates to a wave gear reducer unit including a mechanism that restricts movement of the flexible external gear in the axial direction in the wave gear reducer unit.
- Rotational actuators consist of a flat wave gear reducer and a motor.
- a flat type wave gear reducer is a wave gear reducer provided with a cylindrical flexible external gear.
- the flexible external gear meshes with a stationary-side rigid internal gear with different number of teeth on one side in the axial direction, and meshes with a drive-side rigid internal gear with the same number of teeth on the other side.
- a thrust force acts on the flexible external gear, and the flexible external gear moves in the axial direction. Therefore, it is necessary to arrange a regulating member for regulating the movement of the flexible external gear in the axial direction.
- Patent Document 1 proposes a steering device in which a rotary actuator having a flat wave gear reducer is incorporated.
- a protective plate press-fitted and fixed to the stationary-side rigid internal gear is disposed between the flexible external gear and the motor housing facing each other along the axial direction.
- the protective plate prevents the flexible external gear from moving in the axial direction and interfering with the motor housing.
- the flat wave gear reducer may be provided to the user as a unit incorporated in the unit housing.
- a wave gear reducer unit is assembled to the motor to form a rotary actuator.
- a circular recess is formed in the mounting surface on the side of the wave gear reducer unit so as to surround the motor shaft of the motor to be connected.
- a circular protrusion that can be fitted into the circular recess is formed on the surface.
- the wave gear reducer unit has a circular recess of a size corresponding to the circular protrusion formed on the mounting surface of each motor. Things need to be prepared.
- An object of the present invention is to provide a rotary actuator including a wave gear reducer unit in which a restriction member for restricting movement in the axial direction of a flexible external gear can be easily mounted using a motor. It is in.
- an object of the present invention is to provide a rotary actuator including a wave gear reducer unit that can be easily attached to various motors using a regulating member that can be mounted using a motor.
- the rotary actuator of the present invention is configured as follows. Note that the reference numerals in parentheses indicate the corresponding parts in the embodiments of the present invention, and are attached for ease of understanding, but are intended to limit the present invention to the embodiments. It is not a thing.
- the rotary actuator (1) of the present invention has a wave gear reducer unit (10), a motor (30), and a regulating ring (40).
- the wave gear reducer unit (10) includes a reducer-side attachment end face (15) to which the motor (30) is attached, and a circular center hole (16) formed in the reducer-side attachment end face (15).
- the motor (30) includes a motor side mounting end surface (33) that contacts the speed reducer side mounting end surface (15) and a circular protrusion (34) formed on the motor side mounting end surface (33).
- the restriction ring (40) In the state where the restriction ring (40) is fitted between the outer peripheral surface of the circular protrusion (34) and the inner peripheral surface of the circular center hole (16), the wave gear reducer unit (10) and the motor (30 ) Is assembled coaxially.
- the restriction ring (40) restricts the movement of the cylindrical flexible external gear (25) built in the wave gear reducer unit in the direction of the central axis (1a).
- the regulating ring is mounted on the wave gear reducer unit using a motor assembled on the reducer side mounting surface of the wave gear reducer unit. There is no need to machine a press-fit portion or the like for fixing the restriction ring to the first rigid internal gear or the unit housing. Further, if the wave gear reducer unit is removed from the motor, the regulating ring mounted in the circular center hole of the reducer side mounting surface of the wave gear reducer unit can be easily removed.
- the wave gear reducer unit (10) includes a unit housing (11) having the reducer-side mounting end face (15) and the circular center hole (16), and an inside of the unit housing (11).
- a first rigid internal gear (21) arranged coaxially, and the first rigid internal gear (21) arranged coaxially inside the unit housing (11), the reduction gear mounting end face (15) with respect to the first rigid internal gear (21).
- the second rigid internal gear (22) located on the opposite side of the first and second rigid internal gears (21, 22).
- the flexible external gear (25) capable of meshing with the toothed gears (21, 22) and the flexible external gear (25) are mounted inside the flexible external gear (25).
- the flexible external gear (25) is bent in a non-circular shape to the first Wave generator which is caused partly engaged with (26) at a plurality of positions in the circumferential direction with respect to each of the second rigid internal gear (21, 22), can be configured to include a.
- one motor side end face (43) of the restriction ring (40) abuts on the motor side mounting end face (33).
- An outer peripheral side portion of the other speed reducer side end face (44) of the restriction ring (40) abuts on an end face facing the motor side of the first rigid internal gear (21), and the speed reducer side end face ( 44) faces the first end face of the flexible external gear (25) facing the motor (30).
- the output member (10) 23) can be configured to include an end face (23c) facing the second end face opposite to the first end face in the flexible external gear (25). The end face can restrict movement of the flexible external gear in a direction away from the restriction ring along the direction of the central axis.
- the wave gear reducer unit (10) of the present invention includes a unit housing (11) having a reducer side attachment end face (15) to which a motor (30) is attached, and the reducer side attachment end face (15).
- 21) and a second rigidity which is coaxially arranged inside the unit housing (11) and which is located on the opposite side of the reduction gear side mounting end face (15) with respect to the first rigidity internal gear (21).
- the internal gear (22) is coaxially disposed inside the first and second rigid internal gears (21, 22) and can mesh with the first and second rigid internal gears (21, 22).
- the flexible external gear (25) is mounted inside the flexible external gear (25), and the flexible external gear (25) is bent into a non-circular shape so that the flexible external gear (25)
- a wave generator (26) partially meshed with each of the two rigid internal gears (21, 22).
- FIG. 1 is an explanatory view showing a rotary actuator according to the present embodiment
- FIG. 2 is an explanatory view showing the components separated.
- the rotary actuator 1 includes a wave gear reducer unit 10, a motor 30 that is coaxially attached to the wave gear reducer unit 10, and a regulation ring 40 that is mounted between the wave gear reducer unit 10 and the motor 30. ing.
- a portion of the wave gear reducer unit 10 is shown in cross section.
- the side of the motor 30 in the direction of the central axis 1a in the wave gear reducer unit 10 is referred to as an input side
- the side opposite to the motor 30 is referred to as an output side.
- the wave gear reducer unit 10 includes a cylindrical unit housing 11.
- the unit housing 11 includes a substantially disk-shaped input side housing 12 positioned on the motor 30 side and a cylindrical output side housing 13 positioned on the opposite side.
- the input side housing 12 includes an input side end plate portion 14 having a constant thickness extending in a direction orthogonal to the unit center axis 1a.
- An outer end face facing the input side in the input side end plate portion 14 is a flat end face extending in a direction orthogonal to the central axis 1 a, and the end face is a speed reducer side attaching end face 15 to which the motor 30 is attached.
- a circular center hole 16 extending through the input side end plate portion 14 is formed in the speed reducer side mounting end surface 15.
- the output side housing 13 has an output side end plate portion 17 whose outer end facing the output side extends in a direction perpendicular to the central axis 1a.
- a circular center hole 18 extending through the output side end plate portion 17 is formed in the output side end plate portion 17.
- an annular first rigid internal gear 21 and an annular second rigid internal gear 22 are coaxially arranged in parallel.
- the first rigid internal gear 21 is a stationary rigid internal gear disposed on the input side, and is fixed to the input side housing 12.
- the second rigid internal gear 22 is a drive-side rigid internal gear disposed on the output side with respect to the first rigid internal gear 21.
- a hollow output shaft 23 is integrally formed on the output side of the second rigid internal gear 22. That is, the second rigid internal gear 22 and the hollow output shaft 23 are formed from a single member. These can be manufactured as separate members and fixed coaxially.
- the hollow output shaft 23 has a large-diameter flange 23 a at the rear end of the input side, and the outer peripheral end surface portion of the flange 23 a is connected to the second rigid internal gear 22.
- the shaft portion 23 b on the output side of the hollow output shaft 23 projects through the circular center hole 18 formed in the output side housing 13 to the output side. A space between the outer peripheral surface of the shaft portion 23 b and the circular inner peripheral surface of the circular center hole 18 is sealed with an annular oil seal 24.
- a cylindrical flexible external gear 25 is arranged coaxially.
- the flexible external gear 25 can mesh with both the first and second rigid internal gears 21 and 22.
- the number of teeth of the flexible external gear 25 is the same as the number of teeth of the second rigid internal gear 22 on the driving side, but 2n (n) than the number of teeth of the first rigid internal gear 21 on the stationary side. Is a positive integer), usually two.
- the wave generator 26 having an elliptical contour is mounted on the inside of the flexible external gear 25.
- the wave generator 26 includes a rigid plug 26a having a constant thickness with an elliptical contour, and a wave bearing 26b attached to the elliptical outer peripheral surface.
- the wave bearing is a ball bearing provided with a flexible race ring which can be bent in the radial direction.
- the flexible external gear 25 is bent in an elliptical shape by the wave generator 26, and the flexible external gear 25 has first and second rigid internal teeth at both ends in the major axis direction of the elliptical shape.
- the gears 21 and 22 are partially engaged with each other. When the wave generator 26 is rotated, these meshing positions move in the circumferential direction.
- the flexible external gear 25 having a small number of teeth rotates integrally with the second rigid internal gear 22 on the driving side with respect to the stationary first rigid internal gear 21 having a large number of teeth.
- the rotation of the second rigid internal gear 22 is extracted from the hollow output shaft 23 and transmitted to a load-side member (not shown).
- the motor 30 includes a cylindrical motor housing 31, and a large-diameter flange 32 is formed at the front end of the motor housing 31.
- the front end surface of the flange 32 is a flat surface orthogonal to the central axis 1 a, and this surface is a motor side mounting end surface 33 that abuts the reduction gear side mounting end surface 15.
- a circular protrusion 34 is formed that protrudes by a predetermined width toward the speed reducer. From the center of the circular projecting portion 34, a tip end side shaft portion 35a of the motor shaft 35 projects.
- the distal end side shaft portion 35 a extends through a shaft hole 26 c formed in the rigid plug 26 a of the wave generator 26, and is fixed to the wave generator 26.
- the regulation ring 40 is a ring having a rectangular cross section, and includes a circular outer peripheral surface 41, a circular inner peripheral surface 42, an input side end surface 43, and an output side end surface 44.
- the outer diameter of the circular outer peripheral surface 41 is a dimension corresponding to the inner diameter of the circular inner peripheral surface of the circular center hole 16 formed in the speed reducer-side mounting end surface 15 of the wave gear reducer unit 10. These are dimensions corresponding to the outer diameter of the circular outer peripheral surface of the circular protrusion 34 of the motor-side mounting end surface 33.
- the regulating ring 40 having this size is fitted in an annular gap formed between the circular inner peripheral surface of the circular center hole 16 and the circular outer peripheral surface of the circular protrusion 34.
- the input side end surface 43 which is the motor side end surface of the restriction ring 40, is in contact with the motor side mounting end surface 33.
- the outer peripheral side portion of the output side end surface 44 that is the other speed reducer side end surface of the restriction ring 40 is in contact with the input side end surface of the first rigid internal gear 21 facing the motor 30. Further, the inner peripheral side portion of the output side end surface 44 faces the first end surface of the flexible external gear 25 facing the motor with a slight gap.
- the end surface 23c of the flange 23a of the hollow output shaft 23 in which the second rigid internal gear 22 is integrally formed is opposed to the second end surface on the output side of the flexible external gear 25 with a slight gap.
- the rotary actuator 1 with this configuration is assembled as follows. First, the restriction ring 40 is assembled to the circular protrusion 34 of the motor 30, and the wave generator 26 is assembled to the motor shaft 35 in this state. A wave generator 26 assembled to the motor shaft 35 is fitted coaxially inside the flexible external gear 25 of the wave gear reducer unit 10. The wave generator 26 is fitted until the motor side mounting end surface 33 contacts the reduction gear side mounting end surface 15. As a result, the restriction ring 40 assembled to the circular protrusion 34 on the motor side is fitted into the circular inner peripheral surface of the circular center hole 16 of the speed reducer side mounting end surface 15, and the motor 30 and the wave gear reduction unit 10. Are assembled coaxially. After the assembly, the motor housing 31 and the unit housing 11 are fastened and fixed by fastening bolts (not shown).
- one motor side end face 43 of the regulating ring 40 is located on the same plane as the reduction gear side attaching end face 15, and the motor side end face 43 abuts on the motor side attaching end face 33.
- the outer peripheral side portion of the other reduction gear side end surface 44 of the restriction ring 40 abuts on the inner peripheral edge portion of the end surface facing the motor 30 side of the first rigid internal gear 21.
- the inner peripheral side portion of the speed reducer side end face 44 faces the end face of the flexible external gear 25 facing the motor 30 with a slight gap.
- the flexible external gear 25 tends to move in the direction of the central axis 1a.
- the output side end face 44 of the restriction ring 40 is located on the input side in the direction of the central axis 1a of the flexible external gear 25, and the end face 23c of the hollow output shaft 23 is located on the output side. Therefore, when the flexible external gear 25 moves to the input side, the end of the flexible external gear 25 comes into contact with the restriction ring 40 and its movement is restricted. Similarly, when moving in the opposite direction, the other end of the flexible external gear 25 hits the end surface 23c of the hollow output shaft 23, and the movement is restricted.
- the restriction ring 40 for restricting the movement of the flexible external gear 25 in the axial direction need only be mounted between the motor 30 and the wave gear reducer unit 10 when the motor 30 is assembled. Therefore, unlike the case where the restriction ring 40 is fixed to the unit housing 11 or the first rigid internal gear 21 by press fitting or the like, the assembling work and the disassembling work are facilitated. Further, the restriction ring 40 may have a simple shape, and there is no need to process a fixing portion for press-fitting or the like on the unit housing 11 or the first rigid internal gear 21 side.
- the circular protrusion 34 formed on the motor side mounting end surface 33 of the motor 30 is fitted into the circular inner peripheral surface of the regulating ring 40. Therefore, when assembling the wave gear reducer unit 10 to a different type of motor, it is only necessary to attach a regulating ring 40 having an inner diameter corresponding to the outer diameter of the circular protrusion 34 of the motor to be assembled. By changing only the restriction ring 40, it is possible to cope with a motor having a motor side mounting end surface provided with a circular protrusion 34 having a different outer diameter. Therefore, the versatility of the wave gear reducer unit 10 can be enhanced without a major design change.
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Abstract
Description
Claims (5)
- 波動歯車減速機ユニット(10)と、
モーター(30)と、
規制リング(40)と、
を有し、
前記波動歯車減速機ユニット(10)は、前記モーター(30)が取り付けられる減速機側取付け端面(15)と、当該減速機側取付け端面(15)に形成した円形中心穴(16)とを備え、
前記モーター(30)は、前記減速機側取付け端面(15)に当接するモーター側取付け端面(33)と、当該モーター側取付け端面(33)に形成した円形突出部(34)とを備え、
前記円形突出部(34)の外周面と前記円形中心穴(16)の内周面の間に前記規制リング(40)が嵌め込まれた状態で、前記波動歯車減速機ユニット(10)と前記モーター(30)が同軸に組み付けられており、
前記規制リング(40)は、前記波動歯車減速機ユニットに内蔵された筒状の可撓性外歯歯車(25)の中心軸線(1a)の方向への移動を規制することを特徴とする回転アクチュエーター(1)。 - 前記波動歯車減速機ユニット(10)は、
前記減速機側取付け端面(15)および前記円形中心穴(16)を備えたユニットハウジング(11)と、
前記ユニットハウジング(11)の内部に同軸に配置された第1剛性内歯歯車(21)と、
前記ユニットハウジング(11)の内部に同軸に配置され、前記第1剛性内歯歯車(21)に対して前記モーター取付け端面(33)とは反対側に位置する第2剛性内歯歯車(22)と、
前記第1、第2剛性内歯歯車(21、22)の内側に同軸に配置され、当該第1、第2剛性内歯歯車(21、22)にかみ合い可能な前記可撓性外歯歯車(25)と、
前記可撓性外歯歯車(25)の内側に装着され、当該可撓性外歯歯車(25)を非円形に撓めて、当該可撓性外歯歯車(25)を前記第1、第2剛性内歯歯車(21、22)のそれぞれに対して円周方向における複数の位置において部分的に噛み合わせている波動発生器(26)と、
を備え、
前記規制リング(40)の一方のモーター側端面(43)は、前記モーター側取付け端面(33)に当接し、
前記規制リング(40)の他方の減速機側端面(44)の外周側部分は、前記第1剛性内歯歯車(21)における前記モーターの側を向く端面に当接し、
前記減速機側端面(44)の内周側部分は、前記可撓性外歯歯車(25)における前記モーター(30)の側を向く第1端面に対峙している請求項1に記載の回転アクチュエーター(1)。 - 前記波動歯車減速機ユニット(10)は、前記第2剛性内歯歯車(21)に一体形成され、あるいは固定された出力部材(23)を有し、
前記出力部材(23)は、前記可撓性外歯歯車(25)における前記第1端面とは反対側の第2端面に対峙する端面(23c)を備えている請求項2に記載の回転アクチュエーター(1)。 - モーター(30)が取り付けられる減速機側取付け端面(15)を備えたユニットハウジング(11)と、
前記減速機側取付け端面(15)に形成した円形中心穴(16)と、
前記円形中心穴(16)に装着可能な規制リング(40)と、
前記ユニットハウジング(11)の内部に同軸に配置された第1剛性内歯歯車(21)と、
前記ユニットハウジング(11)の内部に同軸に配置され、前記第1剛性内歯歯車(21)に対して前記減速機側取付け端面(15)とは反対側に位置する第2剛性内歯歯車(22)と、
前記第1、第2剛性内歯歯車(21、22)の内側に同軸に配置され、当該第1、第2剛性内歯歯車(21、22)にかみ合い可能な筒状の可撓性外歯歯車(25)と、
前記可撓性外歯歯車(25)の内側に装着され、当該可撓性外歯歯車(25)を非円形に撓めて、当該可撓性外歯歯車(25)を前記第1、第2剛性内歯歯車(21、22)のそれぞれに対して部分的に噛み合わせている波動発生器(26)と、
を有し、
前記規制リング(40)を前記円形中心穴(16)に嵌め込むと、前記規制リング(40)の一方のモーター側端面(43)は前記減速機側取付け端面(15)と同一平面上に位置し、前記規制リング(40)の他方の減速機側端面(44)の外周側部分は、中心軸線(1a)の方向から前記第1剛性内歯歯車(21)に当接し、前記減速機側端面(44)の内周側部分は、前記中心軸線(1a)の方向から前記可撓性外歯歯車に対峙することを特徴とする波動歯車減速機ユニット(10)。 - 前記第2剛性内歯歯車(22)に一体形成され、あるいは固定された出力部材(23)を有し、
前記出力部材(23)は、前記可撓性外歯歯車(25)に対して、前記中心軸線(1a)の方向における前記規制リング(40)とは反対側から対峙する端面(23c)を備えている請求項4に記載の波動歯車減速機ユニット(10)。
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Application Number | Priority Date | Filing Date | Title |
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CN201380078354.1A CN105473892B (zh) | 2013-08-06 | 2013-08-06 | 旋转致动器以及谐波齿轮减速机单元 |
PCT/JP2013/071271 WO2015019420A1 (ja) | 2013-08-06 | 2013-08-06 | 回転アクチュエーターおよび波動歯車減速機ユニット |
US14/910,340 US9772021B2 (en) | 2013-08-06 | 2013-08-06 | Rotary actuator and strain wave gearing reduction drive unit |
JP2015530585A JP6099751B2 (ja) | 2013-08-06 | 2013-08-06 | 回転アクチュエーターおよび波動歯車減速機ユニット |
KR1020167003881A KR101718683B1 (ko) | 2013-08-06 | 2013-08-06 | 회전 액츄에이터 및 파동기어감속기 유닛 |
DE112013007304.8T DE112013007304B4 (de) | 2013-08-06 | 2013-08-06 | Drehaktuator mit Spannungswellen-Untersetzungsgetriebeantriebseinheit |
TW103124529A TWI648484B (zh) | 2013-08-06 | 2014-07-17 | Rotary actuator and harmonic gear reducer unit |
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PCT/JP2013/071271 WO2015019420A1 (ja) | 2013-08-06 | 2013-08-06 | 回転アクチュエーターおよび波動歯車減速機ユニット |
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CN105473892A (zh) | 2016-04-06 |
JP6099751B2 (ja) | 2017-03-22 |
DE112013007304B4 (de) | 2022-09-29 |
US20160178045A1 (en) | 2016-06-23 |
TW201530017A (zh) | 2015-08-01 |
KR20160033161A (ko) | 2016-03-25 |
KR101718683B1 (ko) | 2017-03-22 |
CN105473892B (zh) | 2018-04-06 |
TWI648484B (zh) | 2019-01-21 |
JPWO2015019420A1 (ja) | 2017-03-02 |
US9772021B2 (en) | 2017-09-26 |
DE112013007304T5 (de) | 2016-05-19 |
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