CN107664185A - Speed changer and driver element - Google Patents
Speed changer and driver element Download PDFInfo
- Publication number
- CN107664185A CN107664185A CN201710636873.5A CN201710636873A CN107664185A CN 107664185 A CN107664185 A CN 107664185A CN 201710636873 A CN201710636873 A CN 201710636873A CN 107664185 A CN107664185 A CN 107664185A
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- Prior art keywords
- planetary rotation
- rotation body
- sun gear
- ring portion
- planetary
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Classifications
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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
- F16H13/00—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members
- F16H13/06—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members with members having orbital motion
- F16H13/08—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members with members having orbital motion with balls or with rollers acting in a similar manner
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Retarders (AREA)
- Friction Gearing (AREA)
Abstract
The present invention provides speed changer and driver element, and it being capable of efficiency passing power well in the transmission.Speed changer (10) has sun gear (1), multiple 1st planetary rotation bodies (2a), multiple 2nd planetary rotation bodies (2b), carrier (3a), inner ring (4), housing (5) and axis body (3b).Multiple 1st planetary rotation bodies (2a) are located at the wherein side of multiple 2nd planetary rotation bodies (2b) in the axial direction.Multiple planetary rotation bodies (2a, 2b) can rotation and can relative to central shaft (C) and revolve round the sun be held in carrier (3a).Carrier (3a) is together to be rotated with the revolution of multiple planetary rotation bodies (2a, 2b) centered on central shaft (C).When by motor (50) to drive sun gear (1) to rotate, the rotation of sun gear (1) is transferred to axis body (3b) via multiple planetary rotation bodies (2a, 2b) and carrier (3a) after deceleration.
Description
Technical field
The present invention relates to a kind of speed changer and driver element.
Background technology
A kind of conventionally, there is known speed changer for spinning up or being exported after slowing down for making motor rotation axis.For example,
In patent document 1, disclosing to have a kind of can will pass to turning for rotating shaft (spindle) main shaft after the spinning up of shaft-like body
Axle.
In the rotating shaft of patent document 1, the one end of shaft-like body has generally cylindrical shape.In described one end of shaft-like body
Portion, formed with three through holes in a manner of along the extending radially through of shaft-like body.Three through holes are along shaft-like body
Circumferential direction and formed with fixed intervals.
Rotating shaft main shaft is pivotably supported by bearing.The one end of rotating shaft main shaft is positioned in described the one of shaft-like body
The inner side of end.Around the one end of rotating shaft main shaft, in a manner of being respectively embedded into three through holes and provided with three
Steel ball (steel ball).In a manner of contacting three steel balls from the radial outside of rotating shaft main shaft, and accommodated provided with a pair of balls
Wheel body.
In the rotating shaft of patent document 1, rotated by shaft-like body, the rotation of steel ball one side while centered on rotating shaft main shaft and
Revolution.The rotation of steel ball is transferred to rotating shaft main shaft by frictional force.Thus, shaft-like body spins up and is transferred to rotating shaft
Main shaft.
Prior art literature
Patent document
Patent document 1：Japanese real public clear 51-29418 publications
The content of the invention
[inventing problem to be solved]
But in the rotating shaft of patent document 1, as described above, being to support rotating shaft main shaft by bearing.Therefore, bearing into
For rotational resistance, decline from shaft-like body to the power transmission efficiency of rotating shaft main shaft.
On the other hand, if removing bearing in the rotating shaft of patent document 1, rotational resistance caused by bearing will disappear.But
It is that now, the axle center of rotating shaft main shaft is indefinite, can not play the function as rotating shaft.
It is an object of the invention to provide a kind of structure for being capable of efficiency passing power well in the transmission.
[technological means for solving problem]
The speed changer of one embodiment of the present invention includes：Sun gear (sun roller), is revolved centered on central shaft
Turn；Multiple planetary rotation bodies, are configured around the sun gear；Carrier (carrier), the multiple planetary rotation body is tieed up
The state for holding to be spaced apart, and by the multiple planetary rotation body support as can rotation and can relative to the central shaft and
Revolution；Inner ring (internal ring), in the sun gear radially, relative to the central shaft, the planetary rotation
The center of body and be located at outside；Housing (casing), keeps the inner ring；And axis body, centered on the central shaft and with
The carrier rotates together with.
The multiple planetary rotation body includes：Multiple 1st planetary rotation bodies, in the axial direction of the sun gear wherein
Side；And multiple 2nd planetary rotation bodies, on the axial direction, more the multiple 1st planetary rotation body and be located at opposite side.
The carrier is together to be rotated with the revolution of the multiple planetary rotation body centered on the central shaft.The inner ring bag
Include：Middle ring, it is located axially at described between the multiple 1st planetary rotation body and the multiple 2nd planetary rotation body, and
Contact the multiple 1st planetary rotation body and the multiple 2nd planetary rotation body；And press section, make the multiple 1st planet
Rotor and the multiple 2nd planetary rotation body press each other with the sun gear, and make the multiple 1st planetary rotation body and
The multiple 2nd planetary rotation body and the middle ring press each other.The multiple 1st planetary rotation body and the multiple 2nd
Planetary rotation body is supported by the carrier being connected.
[The effect of invention]
Speed changer according to an embodiment of the present invention, being capable of efficiency passing power well.
Brief description of the drawings
Fig. 1 is the figure of the schematic configuration of the driver element for the speed changer for representing to possess embodiments of the present invention.
Fig. 2 is Fig. 1 II-II line profiles.
Fig. 3 is towards multiple 1st planetary rotation bodies and multiple 2nd planetary rotations from opposite side from the wherein side on axial direction
The figure of body.
Fig. 4 is represented from the wherein side on axial direction towards multiple 1st planetary rotation bodies and multiple 2nd planets from opposite side
The figure of another during rotor.
Fig. 5 is the figure of the schematic configuration of the driver element for the speed changer for representing to possess another embodiment of the present invention.
Fig. 6 is the figure of another for representing planetary rotation body.
Fig. 7 is the figure for the another example for representing planetary rotation body.
Embodiment
Hereinafter, embodiments of the present invention are explained with reference to.The size of member of formation in each figure is not verily
Represent the size of actual member of formation and the dimensional ratios of each member of formation etc..In addition, in the following description, simply remember
Carry for " axial direction " when, refer to " axial direction " of sun gear, when being simply recited as " radial direction ", refer to " radial direction " of sun gear, simply
When ground is recited as " circumferential direction ", refer to " circumferential direction " of sun gear.Moreover, when being simply recited as " wherein side ", refer to
On the basis of middle ring, multiple 1st planetary rotation sides in the axial direction of sun gear, when being simply recited as " opposite side ", refer to
On the basis of middle ring, multiple 2nd planetary rotation sides in the axial direction of sun gear.
(overall structure)
Fig. 1 is the figure of the schematic configuration of the driver element 100 for the speed changer 10 for representing to possess embodiments of the present invention.Figure
2 be Fig. 1 II-II line profiles.
Reference picture 1, driver element 100 possess speed changer 10 and motor 50.Motor 50 is illustrated first.In addition, this
The speed changer 10 of embodiment can use with known various motor combinations.Therefore, motor 50 is briefly described.
Motor 50 is the motor of outer rotor (outer rotor) type.In present embodiment, motor 50 is drag cup motor
(coreless motor).In addition, in Fig. 1, simplification illustrates motor 50.Motor 50 possesses rotor 51, commutator 52, magnet
(magnet) 53, supporting member 54, framework 55 and lid 56.
Though detailed description will be omitted, rotor 51 includes cylindric coil (coil) and keeps the support of the coil
(holder).In present embodiment, the sun gear described later 1 of speed changer 10 is fixed in the support of rotor 51.That is, this embodiment party
In formula, sun gear 1 is used as the output shaft of motor 50.Commutator 52 has drum.In present embodiment, sun gear 1 is logical
The inner side of over commutation 52 and be fixed on rotor 51.Sun gear 1, rotor 51 and commutator 52 rotate integrally.
Framework 55 has the resettlement section 55a of tubular axially extended, hollow discoideus bottom 55b, cylindric prominent
Go out portion 55c and hollow discoideus bottom 55d.Bottom 55b from the one end in resettlement section 55a axial direction, radially prolong by inner side
Stretch.Bottom 55b diameter is more than the supporting part 3c described later of speed changer 10 diameter.Bottom 55b is as after to speed changer 10
The limiting unit that the movement for the press section 45 stated is limited plays function.Protuberance 55c is from bottom 55b inner peripheral portion towards axle
Upward wherein side protrudes.Protuberance 55c is inserted into the supporting part 3c described later of speed changer 10.Protuberance 55c conducts pair
The supporting part that the rotating member described later 3 of speed changer 10 is pivotably supported plays function.Bottom 55d is from protuberance
Radially inner side extends one end in 55c axial direction.In present embodiment, sun gear 1 runs through bottom 55d.
Magnet 53 is to be fixed in supporting member 54 in the inner side of rotor 51.Supporting member 54 is fixed in lid 56.Lid
Body 56 is fixed in the other end in the axial direction of framework 55.Thus, magnet 53 is fixed in framework 55.Though in addition, save sketch map
Show, but wire for supplying electric current to motor 50 etc. is also suitably located in framework 55.
Next speed changer 10 is illustrated.Speed changer 10 possesses sun gear 1, multiple 1st planetary rotation body 2a, multiple
2nd planetary rotation body 2b, rotating member 3, inner ring 4 and housing 5.
Sun gear 1 is rotated centered on central shaft C.In present embodiment, sun gear 1 is the output shaft of motor 50.Too
The outer peripheral face of sun wheel 1 has recess 1a and recess 1b.Reference picture 1 and Fig. 2, complete cycles of the recess 1a throughout the outer peripheral face of sun gear 1
And extend.Reference picture 1, similarly, recess 1b extend throughout the complete cycle of the outer peripheral face of sun gear 1.Recess 1a and recess 1b exists
It is spaced apart in the axial direction of sun gear 1.In present embodiment, recess 1a is presented axially in the wherein side of sun gear 1.When from
During the radial direction observation of sun gear 1, recess 1a, 1b bend to arc-shaped in a manner of being recessed towards central shaft C respectively.Change speech
It, by the section of central shaft C and the sun gear 1 axially extended, recess 1a, 1b towards central shaft C respectively to be recessed
Mode and bend to arc-shaped.
Reference picture 1 and Fig. 2, multiple 1st planetary rotation body 2a configurations are around sun gear 1.Reference picture 2, this embodiment party
In formula, three the 1st planetary rotation body 2a configurations are around sun gear 1.Reference picture 1, multiple 2nd planetary rotation body 2b configurations exist
Around sun gear 1.In present embodiment, in the same manner as the 1st planetary rotation body 2a, three the 2nd planetary rotation body 2b configurations exist
Around sun gear 1.
Multiple 1st planetary rotation body 2a can respectively centered on 1st axis of rotation R1 parallel relative to central shaft C and from
Turn.Moreover, multiple 2nd planetary rotation body 2b can respectively centered on 2nd axis of rotation R2 parallel relative to central shaft C and from
Turn.Multiple 1st planetary rotation body 2a have toroidal on the section vertical with the 1st axis of rotation R1 respectively.Equally, multiple 2
Planetary rotation body 2b has toroidal on the section vertical with the 2nd axis of rotation R2 respectively.In present embodiment, multiple 1st rows
Star rotor 2a and multiple 2nd planetary rotation body 2b is respectively spheroid.Multiple 1st planetary rotation body 2a diameter and the multiple 2nd
Planetary rotation body 2b diameter is equal to each other.
In present embodiment, in multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b, multiple 1st planets turn
Kinetoplast 2a is presented axially in wherein side, and multiple 2nd planetary rotation body 2b are presented axially in opposite side.It is multiple on axial direction
1st planetary rotation body 2a position is equal to each other, and the position of multiple 2nd planetary rotation body 2b on axial direction is equal to each other.It is multiple
1st planetary rotation body 2a contacts sun gear 1 at recess 1a, and multiple 2nd planetary rotation body 2b contact sun gear at recess 1b
1.In present embodiment, multiple 1st planetary rotation body 2a reach maximum in the diameter of the section vertical with the 1st axis of rotation R1 respectively
Part (hereinafter referred to as the 1st planetary rotation body 2a maximum diameter portion) contact recess 1a.Moreover, multiple 2nd planetary rotation body 2b
Reach the best part in the diameter of the section vertical with the 2nd axis of rotation R2 respectively (hereinafter referred to as the 2nd planetary rotation body 2b is most
Large-diameter portion) contact recess 1b.In the 1st planetary rotation body 2a shown in Fig. 1, the central portion on axial direction is maximum diameter portion.Moreover, figure
In the 2nd planetary rotation body 2b shown in 1, the central portion on axial direction is maximum diameter portion.
Rotating member 3 has the carrier 3a of hollow form, the axis body 3b of solid shape and cylindrical shape supporting part 3c.In axial direction
On, axis body 3b is located at carrier 3a wherein side, and supporting part 3c is located at carrier 3a opposite side.
Carrier 3a, axis body 3b and supporting part 3c can be rotated centered on central shaft C respectively.In present embodiment, carrier
3a, axis body 3b and supporting part 3c are integrated.Therefore, axis body 3b and supporting part 3c be centered on central shaft C and with carrier 3a mono-
With rotation.
Multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b are maintained the state being spaced apart by carrier 3a
And supported.Moreover, carrier 3a supports multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b as can rotation
And it can be revolved round the sun relative to central shaft C.In present embodiment, the 1st planetary rotation body 2a is centered on the 1st axis of rotation R1 and oneself
Turn, and revolved round the sun relative to central shaft C.Moreover, the 2nd planetary rotation body 2b is the rotation centered on the 2nd axis of rotation R2, and phase
Revolved round the sun for central shaft C.Hereinafter, carrier 3a is specifically described.
Reference picture 1 and Fig. 2, carrier 3a have patchhole 31 on its axle center.Sun gear 1 is inserted rotatably into patchhole 31
In.
Reference picture 1, carrier 3a have the multiple resettlement section 32a for housing multiple 1st planetary rotation body 2a and house multiple the
2 planetary rotation body 2b multiple resettlement section 32b.Multiple resettlement section 32a in multiple resettlement section 32a and multiple resettlement section 32b exist
Wherein side is located axially at, multiple resettlement section 32b are presented axially in opposite side.
Reference picture 1 and Fig. 2, resettlement section 32a extends radially through carrier 3a, and distinguishes in carrier 3a inner peripheral surface and outer peripheral face
With opening portion.By the 1st planetary rotation body 2a that resettlement section 32a is housed from the opening portion of the inner peripheral surface side radially inner side
It is prominent and radially protruding outside from the opening portion of the periphery surface side.The radially inner side in 1st planetary rotation body 2a
Prominent part contact sun gear 1, the radially contact inner ring 4 in part protruding outside.In present embodiment, as above institute
State, the recess 1a of the prominent part contact sun gear 1 in the radially inner side in the 1st planetary rotation body 2a.1st planetary rotation
Body 2a contacts with inner ring 4 will be aftermentioned.
Reference picture 2, multiple resettlement section 32a are to be configured in the circumferential direction with fixed intervals.Thus, multiple 1st planets turn
Kinetoplast 2a is supported in carrier 3a with fixed intervals in the circumferential direction.In present embodiment, three resettlement section 32a are in the circumferential direction
Configured with 120 ° of intervals.Thus, three the 1st planetary rotation body 2a are supported in carrier 3a with 120 ° of intervals in the circumferential direction.
Reference picture 1, in the same manner as the 32a of resettlement section, resettlement section 32b extends radially through carrier 3a, and in carrier 3a inner circumferential
Face and outer peripheral face have opening portion respectively.The 2nd planetary rotation body 2b the opening from the inner peripheral surface side housed by resettlement section 32b
Radially inner side is prominent and radially protruding outside from the opening portion of the periphery surface side for oral area.In 2nd planetary rotation body 2b
The prominent part contact sun gear 1 in the radially inner side, the radially contact inner ring 4 in part protruding outside.This implementation
In mode, as described in institute, the prominent part in the radially inner side in the 2nd planetary rotation body 2b contacts the recess of sun gear 1
1b.2nd planetary rotation body 2b contacts with inner ring 4 will be aftermentioned.
Though omitting diagram, in the same manner as multiple resettlement section 32a, multiple resettlement section 32b are in the circumferential direction between fixation
Every and configure.Thus, multiple 2nd planetary rotation body 2b are also supported in carrier 3a with fixed intervals in the circumferential direction.This implementation
In mode, three resettlement section 32b are configured with 120 ° of intervals in the circumferential direction.Thus, three the 2nd planetary rotation body 2b are in Zhou Fang
Upwards carrier 3a is supported in 120 ° of intervals.
In present embodiment, multiple 1st planetary rotation body 2a be movement relative to carrier 3a and in the circumferential direction by
Under the state (that is, the state that the 1st planetary rotation body 2a in the circumferential direction and carrier 3a relative movement is restricted) of limitation, branch
Support in carrier 3a.Similarly, multiple 2nd planetary rotation body 2b are restricted in movement relative to carrier 3a and in the circumferential direction
State (that is, the state that the 2nd planetary rotation body 2b in the circumferential direction and carrier 3a relative movement are restricted) under, be supported in
Carrier 3a.Therefore, carrier 3a and multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b revolution together, with center
Rotated centered on axle C.In present embodiment, carrier 3a is with multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation bodies
2b revolution, rotated centered on central shaft C.
In addition, carrier 3a is the component being connected.In other words, the multiple 1st planetary rotation body 2a of support in carrier 3a
Part and the multiple 2nd planetary rotation body 2b of support part be integrated.Therefore, multiple 1st planetary rotation body 2a and multiple 2
Planetary rotation body 2b revolves round the sun simultaneously.
Fig. 3 is turned from the wherein side on axial direction towards multiple 1st planetary rotation body 2a from opposite side and multiple 2nd planets
Kinetoplast 2b figure.In addition, in figure 3, central shaft C position is represented with a chain-dotted line.And then in figure 3, the 1st planet
The track O at when rotor 2a revolves round the sun, the 1st planetary rotation body 2a center (the 1st axis of rotation R1) is to carry out table with two chain-dotted lines
Show.Though illustrated in addition, omitting, when the 2nd planetary rotation body 2b revolves round the sun, the 2nd planetary rotation body 2b center (the 2nd rotation
Axle R2) track from the wherein side towards from the opposite side when, it is consistent with track O.
Reference picture 3, in present embodiment, when from wherein unilateral observation opposite side on axial direction, the 1st planetary rotation body 2a
Center overlapped with the 2nd planetary rotation body 2b center.In other words, when another from the wherein unilateral observation on axial direction
During side, in the circumferential direction, multiple 1st planetary rotation body 2a position and multiple 2nd planetary rotation body 2b position consistency.
Diametrically, the distance and central shaft at central shaft C and each 1st planetary rotation body 2a center (the 1st axis of rotation R1)
C and the distance at each 2nd planetary rotation body 2b center (the 2nd axis of rotation R2) are equal to each other.In other words, when multiple 1st planets turn
When kinetoplast 2a and multiple 2nd planetary rotation body 2b revolves round the sun, the track O at the 1st planetary rotation body 2a center (the 1st axis of rotation R1)
Diameter, equal with the diameter of the track at the 2nd planetary rotation body 2b center (the 2nd axis of rotation R2).
In addition, as shown in figure 4, when from wherein unilateral observation opposite side on axial direction, multiple 1st planetary rotation body 2a's
It can also stagger in the circumferential direction with multiple 2nd planetary rotation body 2b position.Specifically, for example, multiple 1st planetary rotation body 2a
Position and multiple 2nd planetary rotation body 2b position can also stagger in the circumferential direction 60 °.
Reference picture 1, axis body 3b are extended from carrier 3a towards the wherein side on axial direction.Cylindric supporting part 3c be from
Carrier 3a extends towards the opposite side on axial direction.The diameter of supporting part 3c inner peripheral surface is more than the diameter of patchhole 31.Supporting
In portion 3c, the protuberance 55c of the framework 55 inserted with motor 50.In present embodiment, supporting part 3c can be revolved by protuberance 55c
Turn ground to be supported.
Inner ring 4 diametrically, relative to central shaft C, center and the 2nd planetary rotation body 2b compared with the 1st planetary rotation body 2a
Center and be located at outside.Inner ring 4 is held in housing 5.Inner ring 4 have middle ring 40, the 1st ring portion 41, the 2nd ring portion 42 and
Press section 45.The middle ring portion 41 of ring 40 and the 1st contacts multiple 1st planetary rotation body 2a, and the middle ring portion 42 of ring 40 and the 2nd contacts more
Individual 2nd planetary rotation body 2b.
Reference picture 1 and Fig. 2, the 1st ring portion 41 are presented axially in multiple 1st planetary rotation body 2a wherein side.1st ring
Portion 41 is to be configured with sun gear 1 in coaxial.1st ring portion 41 has annularly to be extended throughout the complete cycle of the 1st ring portion 41
Inclined plane 41a.Inclined plane 41a has toroidal on relative to axial and vertical section.Reference picture 1, it is described vertically to cut open
The diameter of inclined plane 41a on face gradually expands from the wherein side on axial direction towards opposite side.In other words, inclined plane 41a
Tilted towards the opposite side on axial direction.In present embodiment, inclined plane 41a be with the 1st planetary rotation body 2a contact point at, tool
There is bus, the frustum of a cone the part along the 1st planetary rotation body 2a tangential direction extension.Inclined plane 41a and multiple 1st rows
Star rotor 2a is opposite.Inclined plane 41a contacts multiple 1st planetary rotation body 2a.In present embodiment, inclined plane 41a is passing through
Linearly extend on central shaft C and the section (section shown in Fig. 1) axially extended.In addition, inclined plane 41a can also scheme
Bent on section shown in 1.For example, inclined plane 41a also can be in the same manner as Fig. 7 described later inclined plane 46a, to bend to circular arc
The curved surface of shape.
The ring portion 42 of reference picture the 1, the 2nd is presented axially in multiple 2nd planetary rotation body 2b opposite side.2nd ring portion 42 is
Configured with sun gear 1 in coaxial.2nd ring portion 42 has the inclination annularly extended throughout the complete cycle of the 2nd ring portion 42
Face 42a.Inclined plane 42a has toroidal on relative to axial and vertical section.Inclined plane on the vertical section
42a diameter gradually expands from the opposite side on axial direction towards wherein side.In other words, inclined plane 42a is towards its on axial direction
Middle side tilts.In present embodiment, inclined plane 42a be with the 2nd planetary rotation body 2b contact point at, have along the 2nd row
Bus, the frustum of a cone a part for star rotor 2b tangential direction extension.Inclined plane 42a and multiple 2nd planetary rotation bodies
2b is opposite.Inclined plane 42a contacts multiple 2nd planetary rotation body 2b.In present embodiment, inclined plane 42a is in the section shown in Fig. 1
Upper linearly extension.In addition, inclined plane 42a can also be bent in the same manner as inclined plane 41a on the section shown in Fig. 1.
Middle ring 40 in the axial direction, between multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b, and
Contact multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b.In present embodiment, middle ring 40 has the 3rd ring portion
43 and the 4th ring portion 44.Middle ring 40 (the 3rd ring portion 43 and the 4th ring portion 44) is to be configured with sun gear 1 in coaxial.
3rd ring portion 43 in the axial direction, positioned at multiple 1st planetary rotation body 2a opposite side, and is located at its of the 4th ring portion 44
Middle side.3rd ring portion 43 has the inclined plane 43a annularly extended throughout the complete cycle of the 3rd ring portion 43.Inclined plane 43a exists
Relative on axial and vertical section, there is toroidal.The diameter of inclined plane 43a on the vertical section is from axial direction
Opposite side gradually expands towards wherein side.In other words, inclined plane 43a tilts towards the wherein side on axial direction.This embodiment party
In formula, inclined plane 43a be with the 1st planetary rotation body 2a contact point at, have along the 1st planetary rotation body 2a tangential direction
Bus, the frustum of a cone a part for extension.Inclined plane 43a and multiple 1st planetary rotation body 2a are opposite.Inclined plane 43a is contacted
Multiple 1st planetary rotation body 2a.In present embodiment, inclined plane 43a linearly extends on the section shown in Fig. 1.In addition,
Inclined plane 43a can also be bent in the same manner as inclined plane 41a on the section shown in Fig. 1.
4th ring portion 44 in the axial direction, positioned at multiple 2nd planetary rotation body 2b wherein side, and is located at the 3rd ring portion 43
Opposite side.4th ring portion 44 has the inclined plane 44a annularly extended throughout the complete cycle of the 4th ring portion 44.Inclined plane 44a exists
Relative on axial and vertical section, there is toroidal.The diameter of inclined plane 44a on the vertical section is from axial direction
Wherein side gradually expands towards opposite side.In other words, inclined plane 44a tilts towards the opposite side on axial direction.Present embodiment
In, inclined plane 44a be with the 2nd planetary rotation body 2b contact point at, have prolong along the 2nd planetary rotation body 2b tangential direction
Bus, the frustum of a cone the part stretched.Inclined plane 44a and multiple 2nd planetary rotation body 2b are opposite.Inclined plane 44a contacts are more
Individual 2nd planetary rotation body 2b.In present embodiment, inclined plane 44a linearly extends on the section shown in Fig. 1.In addition, incline
Inclined-plane 44a can also be bent in the same manner as inclined plane 41a on the section shown in Fig. 1.
In addition, in present embodiment, the 3rd ring portion 43 and the 4th ring portion 44 are independent components.But the 3rd ring portion 43 and
4 ring portions 44 or the component being connected.That is, the 3rd ring portion 43 and the 4th ring portion 44 or an integrally formed component.
Press section 45 in the axial direction, positioned at the opposite side of the 2nd ring portion 42.As press section 45, such as elastic structure can be used
Part.In present embodiment, as press section 45, use disc spring (coil spring).Press section 45 is and sun gear 1 and carrier
3a configures in coaxial.
Another side contacts 2nd ring portion 42 of the press section 45 from axial direction, by the 2nd ring portion 42 by pressing to its on axial direction
Middle side.In present embodiment, the bottom 55b of the framework 55 of motor 50 in the axial direction, the opposite side positioned at press section 45.Specifically
For, the end of the opposite side in the axial direction of bottom 55b supports press section 45.Thus, press section 45 is towards another on axial direction
The movement of side is restricted.
Press section 45 makes multiple 1st planetary rotation body 2a and middle ring 40 press each other, and makes multiple 2nd planetary rotation bodies
2b and middle ring 40 press each other.Moreover, press section 45 makes multiple 1st planetary rotation body 2a be pressed each other with sun gear 1, and make
Multiple 2nd planetary rotation body 2b are pressed each other with sun gear 1.And then press section 45 makes multiple 1st planetary rotation body 2a and the 1st
Ring portion 41 presses each other, and multiple 2nd planetary rotation body 2b is pressed each other with the 2nd ring portion 42.Hereinafter, to sun gear 1, multiple
The relation of 1st planetary rotation body 2a, multiple 2nd planetary rotation body 2b and inner ring 4 illustrates.
In present embodiment, the pressed portion 45 of the 2nd ring portion 42 is by the wherein side pressed on axial direction, thus, multiple 2nd rows
Star rotor 2b is pushed to the wherein side and radially inner side.Multiple 2nd planetary rotation body 2b be pushed to it is described wherein
Side, thus, middle ring 40 are pushed to the wherein side.Middle ring 40 is pushed to the wherein side, thus, multiple
1st planetary rotation body 2a is pushed to the wherein side and radially inner side.Multiple 1st planetary rotation body 2a are pushed to described
Wherein side, thus, the 1st ring portion 41 are pushed to the wherein side.In addition, the 1st ring portion 41 is towards the wherein side
Movement is limited by the limiting unit 5b described later of housing 5.
As described above, the 2nd ring portion 42 contacts multiple 2nd planetary rotation body 2b on inclined plane 42a.Thus, normal force from
Inclined plane 42a is acted on to each 2nd planetary rotation body 2b.Turn moreover, middle ring 40 contacts multiple 2nd planets on inclined plane 44a
Kinetoplast 2b.Thus, normal force is acted on to each 2nd planetary rotation body 2b from inclined plane 44a.These effect as a result, it is possible to court
Multiple 2nd planetary rotation body 2b are pressed with sufficient power to sun gear 1.Thereby, it is possible in sun gear 1 and multiple 2nd planets
Efficiency passing power well between rotor 2b.
Moreover, middle ring 40 contacts multiple 1st planetary rotation body 2a on inclined plane 43a.Thus, normal force is from inclined plane
43a is acted on to each 1st planetary rotation body 2a.Moreover, the 1st ring portion 41 contacts multiple 1st planetary rotation bodies on inclined plane 41a
2a.Thus, normal force is acted on to each 1st planetary rotation body 2a from inclined plane 41a.These effects as a result, it is possible to towards too
Sun wheel 1 presses multiple 1st planetary rotation body 2a with sufficient power.Thereby, it is possible in sun gear 1 and multiple 1st planetary rotations
Efficiency passing power well between body 2a.
Housing 5 has：Cylindrical portion 5a, is axially extended；Hollow substantially discoideus limiting unit 5b, from cylindrical portion 5a axle
Radially inner side extends upward one end；And cylindric supporting part 5c, from limiting unit 5b inner peripheral portion towards axial direction on
Wherein side protrude.
In cylindrical portion 5a, sun gear 1, multiple 1st planetary rotation body 2a, multiple 2nd planetary rotation body 2b, rotation are contained
Turn the carrier 3a and inner ring 4 of component 3.In addition, in present embodiment, the part of sun gear 1 from cylindrical portion 5a towards axial direction on
Opposite side protrude.Opposite side in cylindrical portion 5a axial direction is fixed in the framework 55 of motor 50.
In cylindrical portion 5a inner peripheral surface, middle ring 40, the 1st ring portion 41 and the 2nd ring portion 42 are installed.In present embodiment,
Middle ring 40, the 1st ring portion 41 and the 2nd ring portion 42 are can be towards axial movement and relative to cylindrical portion 5a and towards the cylindrical portion
In the state of the movement of 5a circumferential directions is restricted, cylindrical portion 5a is installed on.
As described above, in present embodiment, the shifting of middle ring 40, the 1st ring portion 41 and the 2nd ring portion 42 towards the circumferential direction
It is dynamic to be restricted.Thereby, it is possible to making multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b relative to central shaft C and
Swimmingly revolve round the sun.
Limiting unit 5b limits movement of the 1st ring portion 41 towards the wherein side of axial direction as described above.5c pairs of supporting part
Axis body 3b is pivotably supported.Though in addition, omitting diagram, between axis body 3b and supporting part 5c, such as O can be also provided with
Type ring.Now, by the frictional resistance of o-ring, when rotating member 3 stops, or rotation structure ought effectively be acted from the outside in
During part 3, back clearance (backlash) can be suppressed.
In the driver element 100, when sun gear 1 by the driving force of motor 50 to rotate when, multiple 1st planetary rotations
Body 2a and multiple 2nd planetary rotation body 2b rotations, and revolved round the sun relative to central shaft C.By multiple 1st planetary rotation body 2a and
Multiple 2nd planetary rotation body 2b revolution, so as to which carrier 3a is rotated centered on central shaft C.Thus, axis body 3b is with central shaft C
Centered on and rotate.In this way, axis body 3b is transferred to after the rotational deceleration of sun gear 1.
Herein, in speed changer 10, multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b pressing by inner ring 4
Splenium 45 is by pressing to sun gear 1.Moreover, speed changer 10 multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b it
Between there is middle ring 40.By the middle ring 40, multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b are in axial direction
On position be restricted.Thus, when sun gear 1 rotates, multiple 1st planetary rotation body 2a and sun gear 1 are able to maintain that
The contact condition of contact condition and multiple 2nd planetary rotation body 2b and sun gear 1.Thereby, it is possible to from sun gear 1 to axis body 3b
Efficiency passing power (rotation) well.
Moreover, in speed changer 10, multiple 1st planetary rotation body 2a are configured in the axial direction with multiple 2nd planetary rotation body 2b
In different positions.Now, the multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b set for passing power
It can be used as the bearing being pivotably supported to sun gear 1.Thus, with independently of multiple 1st planetary rotation body 2a and multiple
2nd planetary rotation body 2b and be provided for supporting the situation of bearing of sun gear 1 to compare, bearing can be saved, therefore can drop
The loss of the low power transmitted between sun gear 1 and axis body 3b.As a result, can between sun gear 1 and axis body 3b efficiency
Passing power well.Bearing need not separately be set by being additionally, since, therefore can form speed changer 10 small-sizedly.Especially, originally
In embodiment, multiple 1st planetary rotation body 2a contact sun gear 1 at recess 1a, and multiple 2nd planetary rotation body 2b are in recess
Sun gear 1 is contacted at 1b.Thus, either axially still diametrically, sun gear 1 can positioned.
Moreover, in speed changer 10, can be by multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b, will
Power is transferred to axis body 3b from sun gear 1.Now, with only passing through multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation bodies
The situation that either of which in 2b carrys out passing power is compared, and can make the power transmission ability from sun gear 1 towards axis body 3b
Double.Thereby, it is possible to fully improve the capacity of driver element 100.
Moreover, in speed changer 10, the 1st planetary rotation body 2a contacts sun gear 1, the 2nd planetary rotation body 2b at recess 1a
Sun gear 1 is contacted at recess 1b.Now, the 1st planetary rotation body 2a and sun gear 1 contact area and the 2nd row can be increased
Star rotor 2b and sun gear 1 contact area.Thus, in the 1st planetary rotation body 2a and the contact site and the 2nd row of sun gear 1
Star rotor 2b is with that at the contact site of sun gear 1, can suppress partly to produce big stress.As a result, the sun can be suppressed
Take turns the 1, the 1st planetary rotation body 2a and the 2nd planetary rotation body 2b damage.
Moreover, in speed changer 10, middle ring 40, the position of the 1st ring portion 41 and the 2nd ring portion 42 in the axial direction are by limiting unit 5b
Limited.Thus, multiple 1st planetary rotation body 2a and multiple 2nd planetary rotation body 2b are positioned.As a result, sun gear 1
It is restricted towards the movement of axial direction.Thus, the positioning of sun gear 1 becomes easy.
Moreover, in speed changer 10, multiple 1st planetary rotation body 2a are respectively in maximum diameter portion contact recess 1a.Thereby, it is possible to
Multiple 1st planetary rotation body 2a are more suitably pressed towards sun gear 1.As a result, can be in sun gear 1 and multiple 1st planets
Efficiency passing power well between rotor 2a.Multiple 2nd planetary rotation body 2b and recess 1b relation is similarly.
(other embodiment)
Fig. 5 is the driver element 100a for the speed changer 10a for representing to possess another embodiment of the present invention schematic configuration
Figure.Driver element 100a and the driver element 100 difference are：Substitute speed changer 10 and possess speed changer 10a；
And substitute motor 50 and possess motor 60.
Speed changer 10a and the speed changer 10 difference are：Substitute the sun gear 1 and there is sun gear 11；
And substitute the housing 5 and there is housing 15.Sun gear 11 except on axial direction be shorter in length than sun gear 1 in addition to, have with
The same structure of sun gear 1.In addition, the shape of housing can suitably change according to the structure of motor, therefore omit housing 15
Describe in detail.
As the structure of motor 60, using the structure of known various motors, therefore detailed description will be omitted, but motor 60
Possess stator (stator) 60a and rotor 60b.Stator 60a is fixed in the outer peripheral face of housing 15.Rotor 60b has：There is bottom circle
Yoke (yoke) 60c of tubular；And cylindric magnet 60d, it is fixed in yoke 60c inner peripheral surface.Rotor 60b is to cover
The mode of stator 60a periphery and configure.Sun gear 11 is fixed in yoke 60c.Therefore, sun gear 11 and rotor 60b one
Rotation.
In the driver element 100a of present embodiment, when sun gear 11 by the driving force of motor 60 to rotate when, with institute
State driver element 100 similarly, axis body 3b is transferred to after the rotational deceleration of sun gear 11.Herein, in present embodiment, due to
The outer peripheral face of housing 15 is provided with stator 60a, therefore the sizes of driver element 100a diametrically are more than driver element 100 radially
On size.But it is possible to the sizes of driver element 100a in the axial direction are made to be less than the size of driver element 100 in the axial direction.
(some other embodiments)
In the embodiment, it is illustrated to being used as the situation of output shaft of motor using sun gear, but the sun
It may be either integral to take turns with the output shaft of motor, or separate component.That is, motor is independently of sun gear and has output shaft.
Now, the output shaft of sun gear and motor is fixed, the output shaft of sun gear and motor rotates integrally.
In the embodiment, the situation of motor driving sun gear rotation is illustrated, but motor also drivable shaft
Body 3b rotates.Now, sun gear 1 or sun gear 11 are transferred to after the spinning up of axis body 3b.That is, speed changer is sent out as accelerator
Wave function.In addition, in the case where speed changer is used as into accelerator, the output shaft of axis body 3b and motor may be either one, also may be used
For separate component.That is, axis body 3b can be both used as to the output shaft of motor, motor is independently of axis body 3b and has output shaft.
The output shaft of axis body 3b and motor be separate component in the case of, axis body 3b and motor output shaft are fixed, axis body 3b with
The output shaft of motor rotates integrally.
It is respectively the feelings of spheroid to the 1st planetary rotation body 2a and the 2nd planetary rotation body 2b moreover, in the embodiment
Condition is illustrated, but the shape of planetary rotation body is not limited to the example.Specifically, as long as planetary rotation body energy
Enough rotations around central shaft C, and the shape that can be revolved round the sun relative to central shaft C.Thus, for example it also may replace
1 planetary rotation body 2a and use Fig. 6 shown in as columned planetary rotation body 2c.In addition, though detailed description will be omitted, can be fitted
Profile (being more specifically, the shape at the both ends on axial direction), the size of the 1st ring portion 41 as adjustment planetary rotation body 2c/
Position and size/position of the 3rd ring portion 43 etc., enable to by inclined plane 41a, 43a come towards the axle of sun gear 12
To and radially inner side pressing planetary rotation body 2c.Though moreover, detailed description will be omitted, the outer peripheral face of sun gear 12 is and sun gear
1 outer peripheral face similarly, has the recess for planetary rotation body 2c insertions.Though omitting diagram, similarly, the 2nd also may replace
Planetary rotation body 2b and use planetary rotation body 2c.
In addition, columned planetary rotation body includes the diameter of the central portion on axial direction more than both ends diameter, so-called
The planetary rotation body of barrel shape.Thus, for example it also may replace the 1st planetary rotation body 2a and use the planetary rotation body 2d shown in Fig. 7.
In addition, though detailed description will be omitted, can suitably adjust size/position of the 1st ring portion 46, inclined plane 46a shape, the 3rd ring portion
47 size/position and inclined plane 47a shape etc., enable to press towards the axially and radially inner side of sun gear 13
Planetary rotation body 2d.Though moreover, detailed description will be omitted, the outer peripheral face of sun gear 13 be in the same manner as the outer peripheral face of sun gear 1,
With the recess for planetary rotation body 2d insertions.Though omitting diagram, similarly, it also may replace the 2nd planetary rotation body 2b and make
With planetary rotation body 2d.
In the embodiment, the situation for making multiple planetary rotation bodies be arranged in two row in the axial direction is illustrated,
But multiple planetary rotation bodies can be also arranged in more than three row in the axial direction.Moreover, in the embodiment, in each row
In, the situation that three planetary rotation bodies are configured around central shaft C is illustrated, but can also be configured the planet of more than four
Rotor.
[industrial applicability]
The present invention can be used in speed changer and possess the driver element of the speed changer.
Claims (9)
- A kind of 1. speed changer, it is characterised in that including：Sun gear, rotated centered on central shaft；Multiple planetary rotation bodies, are configured around the sun gear；Carrier, the multiple planetary rotation body is maintained the state being spaced apart, and by the multiple planetary rotation body branch Support as that rotation and can be revolved round the sun relative to the central shaft；Inner ring, in the sun gear radially, relative to the central shaft, the center of the planetary rotation body and positioned at outer Side；Housing, keep the inner ring；AndAxis body, rotated together with centered on the central shaft with the carrier,The multiple planetary rotation body includes：Multiple 1st planetary rotation bodies, the wherein side in the axial direction of the sun gear；AndMultiple 2nd planetary rotation bodies, on the axial direction, more the multiple 1st planetary rotation body and be located at opposite side,The carrier is together to be rotated with the revolution of the multiple planetary rotation body centered on the central shaft,The inner ring includes：Middle ring, it is located axially at described between the multiple 1st planetary rotation body and the multiple 2nd planetary rotation body, And contact the multiple 1st planetary rotation body and the multiple 2nd planetary rotation body；AndPress section, make the multiple 1st planetary rotation body and the multiple 2nd planetary rotation body and the sun gear each other by Pressure, and the multiple 1st planetary rotation body and the multiple 2nd planetary rotation body and the middle ring is pressed each other,The multiple 1st planetary rotation body and the multiple 2nd planetary rotation body are supported by the carrier being connected.
- 2. speed changer according to claim 1, wherein：The outer peripheral face of the sun gear has the 1st recess extended throughout complete cycle and second recesses,1st recess and the second recesses are spaced apart on the axial direction,On the section by the central shaft and along the axially extending sun gear, the 1st recess and the described 2nd Recess is respectively facing the central shaft depression,The multiple 1st planetary rotation body contacts the sun gear at the 1st recess respectively,The multiple 2nd planetary rotation body contacts the sun gear at the second recesses respectively.
- 3. speed changer according to claim 2, wherein：The rotation centered on 1st axis of rotation parallel relative to the central shaft respectively of the multiple 1st planetary rotation body, And there is toroidal on the section vertical with the 1st axis of rotation,The rotation centered on 2nd axis of rotation parallel relative to the central shaft respectively of the multiple 2nd planetary rotation body, And there is toroidal on the section vertical with the 2nd axis of rotation,The multiple 1st planetary rotation body reaches the best part in the diameter of the section vertical with the 1st axis of rotation respectively The 1st recess is contacted,The multiple 2nd planetary rotation body reaches the best part in the diameter of the section vertical with the 2nd axis of rotation respectively Contact the second recesses.
- 4. the speed changer according to Claims 2 or 3, wherein：The multiple planetary rotation body is respectively spheroid,The diameter of the multiple planetary rotation body is equal to each other,In the sun gear radially, from the central shaft untill the multiple respective center of planetary rotation body away from From being equal to each other.
- 5. speed changer according to any one of claim 1 to 3, wherein：The inner ring also includes：1st ring portion, on the axial direction, positioned at the wherein side of the multiple 1st planetary rotation body；And2nd ring portion, on the axial direction, positioned at the opposite side of the multiple 2nd planetary rotation body,The middle ring includes：3rd ring portion, on the axial direction, positioned at the opposite side of the multiple 1st planetary rotation body；And4th ring portion, on the axial direction, between the 3rd ring portion and the multiple 2nd planetary rotation body,1st ring portion has inclined plane, and the inclined plane annularly extends throughout the complete cycle of the 1st ring portion, and described Multiple 1st planetary rotation body contacts, and tilted along the axial direction towards opposite side,2nd ring portion has inclined plane, and the inclined plane annularly extends throughout the complete cycle of the 2nd ring portion, and described Multiple 2nd planetary rotation body contacts, and axially tilted along described towards wherein side,3rd ring portion has inclined plane, and the inclined plane annularly extends throughout the complete cycle of the 3rd ring portion, and described Multiple 1st planetary rotation body contacts, and axially tilted along described towards wherein side,4th ring portion has inclined plane, and the inclined plane annularly extends throughout the complete cycle of the 4th ring portion, and described Multiple 2nd planetary rotation body contacts, and tilted along the axial direction towards opposite side.
- 6. speed changer according to claim 5, wherein：The housing has along the axially extending cylindrical portion,1st ring portion, the 2nd ring portion and the middle ring are can be moved axially and relative to the cylinder towards described In the state of shape portion and the movement towards the cylindrical portion circumferential direction are restricted, the inner peripheral surface of the cylindrical portion is installed on.
- 7. speed changer according to claim 5, wherein：2nd ring portion described in the press section from another side contacts on the axial direction, by the 2nd ring portion pressing thereto one Side.
- 8. speed changer according to claim 7, wherein also including：Limiting member, on the axial direction, the 2nd ring portion and be located at opposite side, and limit the press section towards another The movement of side,The housing has limiting unit, and the limiting unit limits in the wherein side for being located axially at the 1st ring portion Movement of 1st ring portion towards wherein side.
- A kind of 9. driver element, it is characterised in that including：Speed changer any one of claim 1 to 8；AndMotor, any one of the sun gear and the axis body is driven to rotate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-149141 | 2016-07-29 | ||
| JP2016149141A JP6727058B2 (en) | 2016-07-29 | 2016-07-29 | Transmission and drive unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107664185A true CN107664185A (en) | 2018-02-06 |
| CN107664185B CN107664185B (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710636873.5A Active CN107664185B (en) | 2016-07-29 | 2017-07-31 | Transmission and drive unit |
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| Country | Link |
|---|---|
| JP (1) | JP6727058B2 (en) |
| CN (1) | CN107664185B (en) |
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| US20030232692A1 (en) * | 2002-06-18 | 2003-12-18 | Yung-Tung Chen | Transmission and variable speed system |
| CN202251737U (en) * | 2011-09-08 | 2012-05-30 | 江阴克威齿轮箱制造有限公司 | Speed reducer in double-planet structure |
| CN203130934U (en) * | 2013-03-25 | 2013-08-14 | 盐城市金洲机械制造有限公司 | Double-stage driving servo planetary reducer |
| CN203146716U (en) * | 2013-03-13 | 2013-08-21 | 上海盛运机械工程有限公司 | Planet gear reducer with two rows of planet gears |
| US20150072828A1 (en) * | 2013-09-11 | 2015-03-12 | Jeffrey A Reuter | Planetary Gearbox Transmission using Gear Bearings |
| CN105570409A (en) * | 2014-10-29 | 2016-05-11 | 日本电产新宝株式会社 | Friction power transmission device |
| CN205371520U (en) * | 2016-01-22 | 2016-07-06 | 吉林大学 | Power drive system based on doublestage planet is arranged two and is kept off derailleur |
| CN105757185A (en) * | 2016-04-25 | 2016-07-13 | 袁廷华 | Speed reducer |
-
2016
- 2016-07-29 JP JP2016149141A patent/JP6727058B2/en active Active
-
2017
- 2017-07-31 CN CN201710636873.5A patent/CN107664185B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030232692A1 (en) * | 2002-06-18 | 2003-12-18 | Yung-Tung Chen | Transmission and variable speed system |
| CN202251737U (en) * | 2011-09-08 | 2012-05-30 | 江阴克威齿轮箱制造有限公司 | Speed reducer in double-planet structure |
| CN203146716U (en) * | 2013-03-13 | 2013-08-21 | 上海盛运机械工程有限公司 | Planet gear reducer with two rows of planet gears |
| CN203130934U (en) * | 2013-03-25 | 2013-08-14 | 盐城市金洲机械制造有限公司 | Double-stage driving servo planetary reducer |
| US20150072828A1 (en) * | 2013-09-11 | 2015-03-12 | Jeffrey A Reuter | Planetary Gearbox Transmission using Gear Bearings |
| CN105570409A (en) * | 2014-10-29 | 2016-05-11 | 日本电产新宝株式会社 | Friction power transmission device |
| CN205371520U (en) * | 2016-01-22 | 2016-07-06 | 吉林大学 | Power drive system based on doublestage planet is arranged two and is kept off derailleur |
| CN105757185A (en) * | 2016-04-25 | 2016-07-13 | 袁廷华 | Speed reducer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107664185B (en) | 2020-04-03 |
| JP6727058B2 (en) | 2020-07-22 |
| JP2018017352A (en) | 2018-02-01 |
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