CN108141113A - Motor - Google Patents
Motor Download PDFInfo
- Publication number
- CN108141113A CN108141113A CN201680059363.XA CN201680059363A CN108141113A CN 108141113 A CN108141113 A CN 108141113A CN 201680059363 A CN201680059363 A CN 201680059363A CN 108141113 A CN108141113 A CN 108141113A
- Authority
- CN
- China
- Prior art keywords
- bearing
- shell
- bearing retainer
- canister portion
- upside
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Motor Or Generator Frames (AREA)
Abstract
A kind of motor, has：Rotor has the axis centered on the central axis vertically extended；Stator, it is arranged opposite radially with rotor；Bearing, support shaft；Bearing retainer keeps bearing；And shell, it is in upper side opening, store rotor, stator and bearing retainer, shell has at least part of control device accepting regions that can store the control device being electrically connected with stator in the position more upper than bearing retainer, the internal diameter of the shell of control device accepting regions is more than the internal diameter of the shell of the position of installation bearing retainer, and bearing retainer is kept by being interference fitted by the inner peripheral surface of shell.
Description
Technical field
The present invention relates to motors.
Background technology
In the past, the known storage member by the motor shell for storing motor and storage control device linked up and integrated
Motor：(referring to patent document 1).
Existing technical literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2013-090376 bulletins
Invention content
The subject that the invention solves
In the case where motor shell and storage member are linked up being recorded as patent document 1, component count quantitative change
More, miniaturization also is difficult to.Accordingly, it is considered to which motor shell is extended, control device and motor are accommodated in shared motor shell
In.In this configuration, motor shell increases the size in the region of storage control device in the axial direction.Thus it is not easy to by structure
Each component into motor is inserted in motor shell.Especially since the holding stator being fixed on the inner peripheral surface of motor shell
The region of the configuration control device in motor shell is passed through with the bearing retainer of bearing and is inserted into, therefore easily damage motor shell
The inner peripheral surface of body, manufacture become difficult.
The first purpose of one embodiment of the present invention is, provides following motor：It can be in the shell (horse of storage motor
Up to housing) in storage control device without damage manufacture easness, can realize the reduction and miniaturization of number of components.
Means for solving the problems
The motor of one embodiment of the present invention is used for torque as defined in the transmission of external driving mechanism.The motor has：Turn
Son has the axis centered on the central axis vertically extended；Stator, and the rotor is opposed radially matches
It puts；Upside bearing supports the upside of the axis；Lower side bearing supports the downside of the axis；Bearing retainer, to institute
Upside bearing is stated to be kept；And shell, in upper side opening, store the rotor, the stator and the bearing and protect
Hold frame.The lower end of the axis is protruding to the outside from the shell, for the external drive mechanism transmit as defined in torque.Institute
Stating shell has：Shell canister portion stores the rotor, the stator and the bearing retainer；Outer casing bottom blocks
The opening of the downside of the shell canister portion；And shell table top, towards the shell on the inner peripheral surface of the shell canister portion
Open side and circumferentially.The shell canister portion the position more upper than the bearing retainer have can store with
At least part of control device accepting regions of the control device of the stator electrical connection.The bearing retainer is by described outer
The inner peripheral surface in thimble portion is kept, and with the shell deck contact, there is the upper shaft kept to the upside bearing to accept insurance
Hold portion.The upside bearing maintaining part has：Upside bearing canister portion, it is chimeric with the outer ring of the upside bearing；And upside
Bearing carrier, in the upper lateral radially inner side extension of the upside bearing canister portion.The outer casing bottom has for institute
State the downside bearing cage that lower side bearing is kept.In the upside bearing, the inner ring of the upside bearing is fixed on
On the axis, and the outer ring of the upside bearing can along the vertical direction be moved relative to the upside bearing maintaining part, and
And the force application part to exert a force along the vertical direction is configured between the upper surface of the outer ring and upside bearing carrier.Described
In lower side bearing, the inner ring of the lower side bearing is fixed on the shaft, and the outer ring of the lower side bearing be fixed on it is described
Downside bearing cage.
The motor of the other modes of the present invention has：Rotor has using the central axis vertically extended in
The axis of the heart；Stator, it is arranged opposite radially with rotor；Bearing, support shaft；Bearing retainer protects bearing
It holds；And shell, in upper side opening, storage rotor, stator and bearing retainer.Shell has：Control device storage area
Domain can store at least part of control device being electrically connected with stator in the position more upper than bearing retainer；With
And table top, faced out on the inner surface of shell shell opening portion and circumferentially.The shell of control device accepting regions
Internal diameter be more than installation bearing retainer position shell internal diameter.Bearing retainer and deck contact, and protected in bearing
The outer edge for holding the upper surface of frame has recess portion and press section, which is located at the radial outside of recess portion and presses shell
Inner peripheral surface.
Invention effect
A mode and other modes according to the present invention, provide following motor：It can be in the easness for not damaging manufacture
In the case of store control device inside the shell, can realize the reduction and miniaturization of number of components.
Description of the drawings
Fig. 1 is the sectional view for the motor for showing present embodiment.
Fig. 2 is the stereogram for showing wire support member and stator in the motor of Fig. 1.
Fig. 3 is the stereogram for showing bearing retainer and stator unit in the motor of Fig. 1.
Fig. 4 is the stereogram for showing bus bar unit and stator unit in the motor of Fig. 1.
Fig. 5 is the main portion sectional view for the variation for showing embodiment shown in FIG. 1.
Specific embodiment
Hereinafter, using attached drawing, embodiments of the present invention will be described.
In the following description, the extending direction of central axis J is set as upper and lower directions.Wherein, this specification is upper and lower
The title that direction is merely to illustrate that and uses does not limit practical position relationship or direction.Also, it is being not particularly illustrated
In the case of, the direction parallel with central axis J is referred to as " axial direction ", the radial direction centered on central axis J is referred to as
Circumferential direction (around axis direction of central axis J) centered on central axis J is referred to as " circumferential direction " by " radial direction ".
In addition, in the present specification, axially extend other than situation about strictly axially extending, also include towards
Relative to the situation of axial direction inclined direction extension in the range of less than 45 °.In addition, it in the present specification, radially extends
In addition to strictly radially, that is, along except situation about extending relative to axially vertical direction, also include towards relative to radially
The situation of inclined direction extension in the range of less than 45 °.
Fig. 1 is the sectional view for the motor 10 for showing present embodiment.Fig. 2 is the solid for showing wire support member and stator
Figure.Fig. 3 is the stereogram for showing bearing retainer and stator unit.Fig. 4 is show bus bar unit and stator unit vertical
Body figure.
Motor 10 is used for torque as defined in the transmission of external driving mechanism.Motor 10 has shell 20, rotor 30, stator
40th, wire support member 70, bearing retainer 55, upside bearing 51, lower side bearing 52 and bus bar unit 60.In motor 10
In, bus bar unit 60, bearing retainer 55, wire support member 70, stator 40 are sequentially matched from upside towards downside according to this
It puts.Motor 10 in the upside of bus bar unit 60 there is at least part of control device that can store control device 100 to receive
Receive region 20A.
Shell 20 has canister portion 21 (shell canister portion), the bottom wall part 23 positioned at the lower end of canister portion 21 vertically extended
(outer shell bottom wall portion) and the opening portion 20a in upper side opening.In the inner surface of shell 20, it is fixed with stator in order from downside
40 and bearing retainer 55.
Canister portion 21 is in the cylindrical shape centered on central axis J.Canister portion 21, which has, to be kept the inner peripheral surface 20b of stator 40, protects
The inner peripheral surface 20c's for the holding bearing retainer 55 and control device accepting regions 20A for the part for storing control device 100 is interior
Circumferential surface 20d.The internal diameter of inner peripheral surface 20d is bigger than the internal diameter of inner peripheral surface 20c.Internal diameter of the internal diameter of inner peripheral surface 20c than inner peripheral surface 20b
Greatly.That is, shell 20 has internal diameter with the inner surface configuration to become smaller from opening portion 20a directions inboard (23 side of bottom wall part).
Shell 20 has the inclined surface 20e for connecting internal diameter different inner peripheral surface 20c and inner peripheral surface 20d.Inclined surface
The surface shape of 20e becomes smaller for internal diameter with towards axial downside.That is, the cross sectional shape of inclined surface 20e is desired for linearly
Or curved shape.Assembling operation person etc. (assembling operation person or assembling device) can successfully will be from opening portion 20a as a result,
The bearing retainer 55 being inserted into downside is configured at installation site (inner peripheral surface 20c).
In addition, shell 20 must not necessarily have inclined surface 20e.For example, shell 20 can be by inner circumferential via order difference part
The structure that face 20c and inner peripheral surface 20d are connected.
Shell 20 has table top towards opening portion 20a and circumferentially between inner peripheral surface 20b and inner peripheral surface 20c
20f (shell table top).Table top 20f is the bearing plane for contacting with bearing retainer 55 and being supported in an axial direction.With this configuration,
Bearing retainer 55 is easily positioned and is easily realized relative to axial squareness by shell 20 in the axial direction, because
This, can accurately keep bearing retainer 55.
The shape of canister portion 21 is not limited to cylindrical shape.As long as canister portion 21 can keep stator 40 and bearing to protect on inner peripheral surface
The shape of frame 55 is held, then the shape of canister portion 21 for example can also be box-shaped.In addition, the shape of canister portion 21 can also be by cylindrical shape
With shape obtained by tank-shaped composite.In canister portion 21, stator 40 or bearing retainer 55 can be by the circumferential directions of inner surface
A part is kept.
Bottom wall part 23 is configured at the downside of stator 40, has the downside bearing cage 23a for keeping lower side bearing 52 and edge
Axially through the output shaft hole 22 of bottom wall part 23.
Rotor 30 has axis 31.Axis 31 is centered on the central axis J vertically extended.Rotor 30 with axis 31 together
It is rotated around central axis J.The end of the downside of axis 31 is prominent via the downside of output shaft hole 22 to shell 20.Under the axis 31
End is provided with the power transfer unit (illustration omitted) of gear even flowing.The torque of motor 10 is via the power transfer unit
It is transmitted to external drive mechanism.
Upside bearing 51 and lower side bearing 52 support axis 31 can be rotated around central axis.The size of bearing is downside
Bearing 52 is bigger than upside bearing 51, therefore correspondingly descends the permissible load performance of side bearing 52 more excellent.Lower side bearing 52 exists
The downside of stator 40 is held in downside bearing cage 23a.
Downside bearing cage 23a by be embedded in the peripheral surface of lower side bearing 52 canister portion 23b (downside bearing canister portion) and
It is formed from the carrier 23c (the 1 time side bearing carrier) of the lower lateral radially inner side extension of canister portion 23b.Lower side bearing 52
Inner ring 52a is fixed on by being pressed on axis 31.About the outer ring 52b of lower side bearing 52, the lower surface of outer ring 52b and carrier
23c is contacted and is fixed on canister portion 23b by being pressed into.And then the upper end of canister portion 23b is added by part to radially inner side riveting
Work is clamped outer ring 52b with carrier 23c by using it and is firmly fixed.Upside bearing 51 is kept in the upside of stator 40
On bearing retainer 55.Details about bearing retainer 55 is hereinafter recorded.
Stator 40 is located at the radial outside of rotor 30.Stator 40 has stator core 41, insulating part 42, coil 43.Insulation
Part 42 is mounted on the tooth 41a of stator core 41.Coil 43 is made of the conducting wire for being wound in insulating part 42, is configured in each tooth 41a
On.The peripheral surface of stator 40 is fixed on the inner peripheral surface 20b of shell 20.
As depicted in figs. 1 and 2, wire support member 70 has the 1st conductive component 71, the 2nd conductive component 72, multiple (figures
It is six in showing) conductor-retaining portion 75 and main part 73.Wire support member 70 is configured on stator 40.By conducting wire supporting part
Part 70 and stator 40 form stator unit.On the 1st conductive component 71,72, it is connected with the so-called neutral point of coil.In following theory
In bright, the 1st conductive component 71 and the 2nd conductive component 72 are known as the 1st neutral point busbar 71 and the 2nd neutral point busbar 72.
Main part 73 is annular in shape, is configured in the upside of stator 40.Main part 73 has the multiple feet extended to axial downside
Portion 73a.Foot 73a is embedded in the mounting groove 42a of insulating part 42, so as to which wire support member 70 is supported on stator 40.It is main
Body portion 73 is made of insulating materials such as resins.
The inner peripheral in main part 73 is configured in conductor-retaining portion 75.Conductor-retaining portion 75 has dashes forward upward from main part 73
The recess portion 75b of the bearing wall portion 75a gone out and the radially inner side opening in bearing wall portion 75a.Six conductor-retaining portions 75 are along week
There are two being respectively configured to three positions for separating 120 °.Also, conductor-retaining portion 75 can also be configured in the periphery of main part 73
Edge.Configuration and the number of conductor-retaining portion 75 are it can be considered that the radical of aftermentioned lead-out wires of coil and the extraction position of lead-out wires of coil
It puts etc. and suitably changes.
Main part 73, which has, to be overlooked in fan-shaped notch 73b, 73c.Notch 73b, 73c are configured in the outer of main part 73
Two positions of circumference.1st neutral point busbar 71 and the 2nd neutral point busbar 72 are respectively provided with the connection terminal of three U-shapeds
71a, 72a and through hole 71b, a 72b.1st neutral point busbar 71 and the 2nd neutral point busbar 72 and conductor-retaining portion 75
Compared to configuration in the peripheral side of main part 73.When from end on observation, the 1st neutral point busbar 71 and the 2nd neutral point busbar
72 expose from notch 73b, 73c.Main part 73 has to axially projecting protrusion 73d, 73e.Protrusion 73d, 73e are configured
In the peripheral side of main part 73.The circumferential position of protrusion 73d, 73e are identical with the circumferential position of notch 73b, 73c.Protrusion
Portion 73d, 73e in through hole 71b, 72b of the 1st neutral point busbar 71 and the 2nd neutral point busbar 72 is embedded in after quilt
It heats and melting and solidification.The 1st neutral point busbar 71 and the 2nd neutral point busbar 72 are fixed on main part 73 as a result,.And
And the 1st neutral point busbar 71 and the 2nd neutral point busbar 72 can also be set along with notch 73b, 73c in main part
73 inner peripheral portion.
Stator 40 have the 12 lead-out wires of coil 91A~91C extended from multiple coils 43,91a~91c, 92A~92C,
92a~92c.Lead-out wires of coil 91A~91C, 92A~92C around stator 40 upside and with the recess portion of conductor-retaining portion 756
75b is starting point to axial upside bending, so as to be held in conductor-retaining portion 75.At the opening portion of the radially inner side of recess portion 75b
Circumferential width is smaller than the line footpath of coil 43.The line footpath of internal diameter and coil 43 at the position of the radial outside of recess portion 75b is substantially
It is identical.As a result, when lead-out wires of coil 91A~91C, 92A~92C are pushed into inwardly from the opening portion of recess portion 75b, opening portion
It is extended due to flexible deformation, lead-out wires of coil 91A~91C, 92A~92C are contained to recess portion 75b, and then opening portion is restored.
In this way, coil 43 is held in conductor-retaining portion 75.It is held in lead-out wires of coil 91A~91C, the 92A of conductor-retaining portion 75
~92C is upwardly projecting from recess portion 75b to axis.Also, it since coil 43 has certain rigidity, is protruded from conductor-retaining portion 75
Lead-out wires of coil 91A~91C, 92A~92C will not lodge or substantially deviate.Lead-out wires of coil 91a~91c and the 1st neutral point
The connection terminal connection of busbar 71.Lead-out wires of coil 92a~92c is connect with the connection terminal of the 2nd neutral point busbar 72.
Lead-out wires of coil 91A~91C is the wiring of the power supply of each phase (U phases, V phases, W phases), lead-out wires of coil 91a~
91c is the wiring of neutral point connection corresponding with lead-out wires of coil 91A~91C.Lead-out wires of coil 92A~92C is each phase
The wiring of power supply, lead-out wires of coil 92a~92c are the cloth of neutral point connection corresponding with lead-out wires of coil 92A~92C
Line.
On the lead-out wires of coil drawn from coil 43, the insulation tube 98 as insulating element is installed.Insulation tube 98 is true
Protect lead-out wires of coil 91A~91C, 91a~91c, 92A~92C, 92a~92c that the lower surface along wire support member 70 extends
Each other and the insulation between coil 43.As long as lead-out wires of coil, which can insulate, is just not limited to insulation tube 98.
Bearing retainer 55 is substantially disk-shaped, is configured in the upside of stator 40.Bearing retainer 55 is to upside bearing 51
It is kept.Bearing retainer 55 is kept by being interference fitted by the inner peripheral surface 20c of shell 20.In the situation of present embodiment
In, bearing retainer 55 is fixed on by hot jacket cooperation on inner peripheral surface 20b.Bearing retainer 55 can also be fixed on by press-in
On the inner peripheral surface 20b of shell 20.In addition, hot jacket cooperation is included in the fitting method in interference fit.
Thereby, it is possible to bearing retainer 55 is fixed on shell 20 without additional component for fixing or fixation position
On.For example, as component for fixing, there is C-shaped ring and screw.Bearing retainer 55 is fixed on shell 20 using C-shaped ring
In the case of upper, the setting on the inner peripheral surface 20b of shell 20 is needed to keep the slot of C-shaped ring as fixation position.Also, therewith
In the same manner, in the case where using screw, it is also desirable to be threaded hole respectively on shell 20 and bearing retainer 55 as solid
Surely position is used.But in the composition of present embodiment, since fixation position need not be set, therefore, it is possible to make shell 20
Wall thickness is thinning.As a result, necessary to 55 grade of stator 40 and bearing retainer can be kept ensureing while internal diameter,
Reduce the outer diameter of shell 20.Therefore, it is possible to reduce whole number of components, further, it is possible to realize the miniaturization of motor 10.
As shown in figures 1 and 3, bearing retainer 55 has：Inside canister portion 55a (upside bearing maintaining part), to upside
Bearing 51 is kept；Outer side tube part 55b coordinates with the inner peripheral surface 20b of shell 20；And linking part 55c, by inboard cylinder
Portion 55a and outer side tube part 55b are linked up.
Inside canister portion 55a is from the canister portion 55a1 (upside bearing canister portion) with the peripheral surface of upside bearing 51 and from canister portion
The carrier 55a2 (upside bearing carrier) of the lower end edge radially inner side extension of 55a1 is formed.The inner ring 51a of upside bearing 51
It is fixed on axis 31 by press-in in a manner that the lower surface of inner ring 51a is contacted with the step surface of axis 31.Upside bearing 51
Outer ring 51b is coordinated in a manner of it can move in the up-down direction with canister portion 55a1.The upper surface of 51b and carrier in outer ring
Wave washer 80 (force application part) is intervened between 55a2 in a manner of exerting a force in the up-down direction.
Wave washer 80 presses bearing retainer 55 to upside (bearing retainer 55 leaves the direction of bottom wall part 23), and
Outer ring 51b is pressed to downside.After outer ring 51b is pressed to downside, ball 51c presses inner ring 51a to downside.Inner ring 51a quilts
After being pressed to downside, by axis 31, the inner ring 52a of lower side bearing 52 is pressed to downside.Inner ring 52a is pressed it to downside
Afterwards, ball 52c presses outer ring 52b to downside.
In this way, the force of the downside of wave washer 80 is respectively acting on upside bearing 51 and lower side bearing 52, so as to two
Bearing 51,52 maintains to apply the state of certain force between Internal and external cycle and ball, and steadily rotor is rotationally supported.
As previously mentioned, the state for applying force to two bearings 51,52 is known as being applied with to the state of precompressed.
Linking part 55c has intermediate canister portion 55d, inside linking part 55e and outside linking part 55f.Intermediate canister portion 55d is
Cylindrical shape, between inside canister portion 55a and outer side tube part 55b.Inside linking part 55e is in plan view annular shape, will
The lower end of intermediate canister portion 55d and the peripheral surface of inside canister portion 55a connect.Outside linking part 55f is in plan view circle
Ring-type connects the upper end of inside linking part 55e and the upper end of outer side tube part 55b.
In Fig. 1, the end of the radially inner side of linking part 55c is to axial lower lateral bend, also, prolongs towards radially inner side
It stretches, is connect with inside canister portion 55a.Being formed between interior side tube part 55a and linking part 55c has gap.Therefore, inside canister portion 55a
It being capable of flexible deformation radially with linking part 55c.Therefore, though in the assembling of motor or motor in use, due to
20 dilation of temperature change bearing retainer 55 and shell, so as between bearing retainer 55 and shell 20 auxiliary section,
In the case of the effects that upside bearing 51 excessive pressing force, also using the flexible deformation of inside canister portion 55a and linking part 55c come
Absorb the pressing force.Therefore, it is possible to inhibit the reduction of the fixing intensity (fastening strength) between bearing retainer 55 and shell 20
Or rise, also, axis 31 is supported to and can swimmingly rotate by upside bearing 51.
Bearing retainer 55 has multiple through hole 56a~56c, the 57a~57c for axially penetrating through bearing retainer 55.It is more
A through hole 56a~56c, 57a~57c are arranged on the linking part 55f of outside.
Lead-out wires of coil 91A, 91B, 91C pass through corresponding through hole 56a, 56b, 56c, extend to bearing retainer
55 upside.Lead-out wires of coil 92A, 92B, 92C extend to bearing retainer across corresponding through hole 57a, 57b, 57c
55 upside.The internal diameter of the opening of through hole 56a, 56c is more than the outer diameter of conductor-retaining portion 75.Neutral point connection as a result,
Connecting portion between lead-out wires of coil 91a, 91b, 92c and connection terminal 71a, 72a can keep insulating with bearing retainer 55.
It is also identical with through hole 56a, 56c about the composition of through hole 56d, the 56e of configuration on bearing retainer 55, therefore, save
Slightly its explanation.
There are three recess portions 58 in the upper surface of the outer edge of bearing retainer 55 tool for bearing retainer 55.In bearing retainer
55 upper surface carries out pressure processing (such as riveting processing etc.) etc. by using pin etc. and sets recess portion 58.It is kept when to bearing
When frame 55 carries out pressure processing, the pressurized position of the upper surface of bearing retainer 55 is plastically deformed, and forms recess portion 58,
And form the press section 59 protruded from the outside of bearing retainer 55 towards radial outside.Bearing retainer 55 is configured in shell
When in 20, press section 59 partly presses the inner peripheral surface 20c of shell 20.Bearing retainer 55 is matched by hot jacket as a result,
Close and be fixed by caulking to the inner peripheral surface 20c of shell 20.
For the part being interference fitted with shell 20 of bearing retainer 55, by the way that press section 59, shell 20 and axis is configured
The pressing force for holding retainer 55 partly improves, and can further improve the fastening strength of two components.
At least one of recess portion 58 is configured near through hole 56a~56c.In the present embodiment, such as Fig. 3 institutes
Show, recess portion 58 is configured near through hole 56a and near through hole 56b.Through hole 56a, 56b and neighbouring recess portion 58 it
Between distance according to the angle around central axis within 15 °.Recess portion 58 is formed by being plastically deformed, therefore forming position
The intensity of component improves.Near through hole 56a~56c, the intensity of bearing retainer 55 is easily reduced, but in through hole
Recess portion 58 is configured near 56a~56c, so as to it is easy to ensure that intensity.
The linear expansion coefficient for forming material of the linear expansion coefficient of the material of bearing retainer 55 with forming shell 20 is equal.
With this configuration, relative to the temperature change assembled in shell 20 after bearing retainer 55, shell 20 is kept with bearing
The swell increment of frame 55 is identical with shrinkage, therefore the installation of bearing retainer 55 is not easy to relax.In the situation of present embodiment
Under, bearing retainer 55 and shell 20 are made of aluminum or aluminum alloy.
Bus bar unit 60, which has, mutually uses busbar 61a~61c, 62a~62c；And to mutually use busbar 61a~61c,
The busbar retainer 65 that 62a~62c is kept.Busbar retainer 65 has perforation busbar retainer 65 in the axial direction
Three through holes 65A, 65B, 65C.
Busbar retainer 65 is fixed on the upper surface of bearing retainer 55.From the through hole 56a of bearing retainer 55
~56c, 57a~57c passes through the perforation of busbar retainer 65 to lead-out wires of coil 91A~91C, the 92A~92C that upside extends
Hole 65A~65C and to busbar retainer 65 upside extend.Lead-out wires of coil 91A~91C, 92A~92C are protected in busbar
The upper surface for holding frame 65 is connect respectively with mutually with busbar 61a~61c, 62a~62c.
Mutually functioned by the use of busbar 61a~61c, 62a~62c as the connection terminal with control device 100.Busbar
Unit 60 is fixed on the upper surface for the bearing retainer 55 for being fixed on shell 20 with high precision, thus mutually with busbar 61a~
61c, 62a~62c are positioned with high precision in the axial direction in the 20A of control device accepting regions.With this configuration, motor 10 with
The connectivity of control device 100 improves.
Stator 40 coordinates the inner peripheral surface 20b to be held in shell 20 by hot jacket.Construction of the shell 20 for only upper side opening,
Therefore stator 40 is inserted into downside from the opening portion 20a of shell 20, is configured in the position of inner peripheral surface 20b.
Here, the inner peripheral surface 20c's of the inner peripheral surface 20d of control device accepting regions 20A and holding bearing retainer 55 is interior
Diameter is more than the internal diameter of inner peripheral surface 20b.Therefore, in assembling, stator 40 is made stator 40 coaxially to be made to move in the axial direction with shell 20
It is dynamic, it is inserted into so as to which stator 40 is not made to be contacted with inner peripheral surface 20c, 20d.Even if coaxially shifting, as long as the offset
Within the difference in internal diameters of inner peripheral surface 20b, 20c, then it can avoid contact with.In addition, when carrying out hot jacket cooperation to stator 40, externally
Shell 20 is heated, therefore shell 20 expands, and the internal diameter of inner peripheral surface 20b slightly becomes larger.As a result, inserting in stator 40
Fashionable, the peripheral surface of stator 40 is not easy to contact with inner peripheral surface 20b.After the completion of the insertion of stator 40, the temperature drop of shell 20
It is low, and shell 20 is shunk, therefore the inlay resultant force of stator 40 and inner peripheral surface 20b improves.In such manner, it is possible to do not damage inner peripheral surface
20d and inner peripheral surface 20c, and stator 40 is maintained at inner peripheral surface 20b.
In addition, bearing retainer 55 is maintained at the inner peripheral surface 20c of shell 20 by hot jacket cooperation.Shell 20 is opened for only upside
The construction of mouth, therefore bearing retainer 55 is inserted into downside from the opening portion 20a of shell 20, is configured in the position of inner peripheral surface 20c.
Here, in shell 20, the internal diameter ratio of the inner peripheral surface 20d of control device accepting regions 20A is fixed with bearing holding
The internal diameter of the inner peripheral surface 20c of the position of frame 55 is big.Therefore, in assembling, make bearing retainer 55 and shell 20 coaxial, by making
Bearing retainer 55 is axially moveable, and can be inserted into bearing retainer 55, without being contacted with inner peripheral surface 20d.It that is, can be by axis
It holds retainer 55 to be embedded in, the inner peripheral surface 20d without damaging the position for being accommodated with control device 100.It is it is assumed that even if coaxial inclined
It moves, if its offset can be also avoided contact within the difference in internal diameters of inner peripheral surface 20c, 20d.
In addition, when carrying out hot jacket cooperation to bearing retainer 55, by heating shell 20, and shell 20 expands, inner circumferential
The internal diameter of face 20c becomes larger slightly.As a result, in the insertion of bearing retainer 55, the peripheral surface of bearing retainer 55 is difficult to
It is contacted with inner peripheral surface 20c.After the insertion of bearing retainer 55, since the temperature of shell 20 reduces, and shell 20 is received
Contracting, therefore the inlay resultant force of bearing retainer 55 and inner peripheral surface 20c improves.In such manner, it is possible to by bearing retainer 55 relative to inner circumferential
Face 20c is kept, without damaging inner peripheral surface 20d.
As a result, in the case that by the way that control device 100 to be embedded in the inner peripheral surface 20d of shell 20 and fixed, due to not having
Inner peripheral surface 20d is damaged, therefore control device 100 can precisely be fixed.If being damaged in addition, inner peripheral surface 20d has, by
In abrasion piece of damaged portion etc. adhere to the inside of control device or motor and sometimes become failure the reason of, therefore not will control
Device 100 processed be embedded in inner peripheral surface 20d but Shi Yong the method for Do come in the case of fixed, the better off of this structure.In addition, by
It is other component in the control device 100 for having stored shell 20, therefore compared to the storage member of previous storage control device
Situation, can realize abatement and the miniaturization of number of components.
In addition, for inclined surface 20e, when bearing retainer 55 and stator 40 are inserted into shell 20, it is assumed that same
In the case of axle offset, if the offset within the difference in internal diameters of inner peripheral surface 20d and inner peripheral surface 20c, by with inclined surface
20e contacts can be adjusted to coaxially match.The size management of concentricity when as a result, due to assembling operation mitigates, group
Assembling operation can easily be carried out by pretending dealer etc..
In motor 10, by the way that bearing retainer 55 is riveted processing and when fixing, bearing retainer 55 is by downwards
To strong press-in.If at this point, even if the axial position of bearing retainer 55 from installation site deviate, also can be reliably
It is pressed into defined installation site.
Peripheral surface of the bearing retainer 55 in outer side tube part 55b is chimeric with the inner peripheral surface 20c of shell 20.In this configuration,
Since the height of outer side tube part 55b is more than the wall thickness of the linking part 55c of bearing retainer 55, bearing retainer can be ensured that
55 with the contact area of shell 20 (or fastening length) bigger, the fastening strength of bearing retainer 55 can be increased.The structure
In the case where forming bearing retainer 55 by the way that metallic plate is carried out punch process, since outer side tube part 55b can be made curved
It is bent and is formed, therefore be more convenient.In the present embodiment, outer side tube part 55b is formed from the outer circumference end of linking part 55c to downside
The cylindric construction being connect but it is also possible to be linking part 55c with the inner peripheral surface of outer side tube part 55b of extension.It or or will
The cylindrical shape that outer side tube part 55b extends from the outer circumference end of linking part 55c to upside.
In addition, in motor 10, two bearings 51,52 support the load for being applied to rotary body.In motor 10, due to
Torque is transmitted, therefore the load for being applied to rotary body for lower side bearing 52 is big by the external drive mechanism of the downside of axis 31
It is small bigger than upside bearing 51.In order to which the applying method of the load with such two bearings 51,52 is corresponding, lower side bearing 52 it is interior
Circle 52a and outer ring 52b is individually fixed in axis 31 and shell 20.The inner ring 51a of upside bearing 51 is fixed on axis 31, outer ring 51b warps
It is movably kept by bearing retainer 55 by wave washer -80.That is, it is configured to：It will be in order to apply the wave washer 80 of precompressed
51 side of upside bearing is set to, Internal and external cycle 52a, 52b of lower side bearing 52 are individually fixed in axis 31 and bottom wall part 23, load is applied
It is added on lower side bearing 52.
Since if the load suffered by lower side bearing 52 becomes larger, the load suffered by upside bearing 51 becomes smaller, via upper shaft
51 load for acting on bearing retainer 55 are held also to become smaller.Thereby, it is possible to reduce bearing retainer 55 being fixed on shell
Fastening strength between 20 required bearing retainers 55 and shell 20.If the fastening strength can be reduced, can reduce
The contact area (or fastening length) of bearing retainer 55 and shell 20, can inhibit the size of the upper and lower directions of motor 10
Expand.Further, since the fastening strength of bearing retainer 55 and shell 20 can be reduced, therefore the change to shell 20 can be inhibited
Shape.If the deformation of shell 20 can be inhibited, control device 100 can be precisely accommodated in shell 20.
In addition, due to two bearings 51,52 the permissible load being obtained it is of different sizes, allowed respectively using what is be obtained
Bearing size corresponding to the size of load.Therefore, the most suitable bearing size of two bearings 51,52 is had selected.
Next, the assemble method of motor 10 is illustrated.First, shell 20 is configured at defined pedestal, this
Seat is positioned at the upside of bottom wall part 23, the upside of opening portion 20a.At this point, lower side bearing 52 is inserted via opening portion 20a to downside
Enter, and be pressed into downside bearing cage 23a, by the upper end radially inward riveting processing of canister portion 23b.Then, shell 20 is heated
And expand canister portion 21.The internal diameter of canister portion 23b expands as a result,.In this state, it is stator unit is downward via opening portion 20a
Side insertion is simultaneously chimeric with inner peripheral surface 20b.If the temperature of shell 20 reduces, canister portion 21 is shunk, by improving its fastening strength, and
Hot jacket cooperation terminates.
On the other hand, it is assembled apart being turned by what rotor 30, upside bearing 51, bearing retainer 55, wave washer 80 were formed
Subelement.At this point, since bearing retainer 55 and upside bearing 51 are only fitted into and can move in the up-down direction, into
For easily decomposed state.But the carrier 55a2 of bearing retainer 55 is made to be located at the position more upper than upside bearing 51,
And make axis 31 along upper and lower directions, so as to which rotor unit is temporarily placed on defined pedestal.Rotor unit is protected because of bearing
It holds the dead weight of frame 55 and canister portion 55a1 and carrier 55a2 is made to be hooked in outer ring 51b via wave washer 80, therefore will not decompose
And it can place temporarily.
Then, it is heated again centered on the upside of the canister portion 21 of shell 20 and expands canister portion 21.Canister portion as a result,
The internal diameter of the upside of 23b is extended.In this state, the upside bearing 51 of rotor unit is held using defined holding means
The lower surface of outer ring 51b or the upside of axis 31, via shell 20 opening portion 20a to downside be inserted into.At this point, under axis 31
After end reaches lower side bearing 52, axis 31 to downside is pressed and axis 31 is pressed into the inner ring 52a of lower side bearing 52.Together
When, bearing retainer 55 is contacted with table top 20f, and chimeric with inner peripheral surface 20c.When the temperature of shell 20 reduces, canister portion 21 is opened
Begin to shrink, fastening strength increases, and shrunk fit is completed as a result,.Later, using pin etc. to the upper table of the outer edge of bearing retainer 55
Face carries out riveting processing and forms recess portion 58.By the formation of the recess portion 58, press section 59 presses inner peripheral surface 20c to radial outside
Pressure, therefore further improve the fastening strength of two components.
When rotor unit is inserted into shell 20, makes the co-axially align of two components on one side, circumferentially positioned on one side
So that each lead-out wires of coil 91A~91C, 91a~91c, 92A~92C, 92a~92c and each through hole 56a~56d, 57a~
57d is consistent.
Then, bus bar unit 60 is configured via the opening portion 20a of shell 20 in the upper surface of bearing retainer 20.This
When, circumferentially it is positioned such that each through hole 65A~65C of bus bar unit 60 and each lead-out wires of coil 91A~91C, 92A
~92C is consistent.Later, when respectively to each lead-out wires of coil 91A~91C, 92A~92C with mutually use busbar 61a~61c, 62a
When~62c is welded, the fixed of bus bar unit 60 is completed.
In above a series of assemble method, the configuration status of shell 20 maintain always, it can be by lower side bearing
52nd, stator unit, rotor unit, bus bar unit 60 are all inserted into shell 20 from identical direction and are assembled, because
The workability of this assembling is good.
The reason of such assemble method can be realized is following structure.Due to holding for downside bearing cage 23a
Socket part 23c is the shape positioned at the downside of canister portion 23b, therefore can lower side bearing 52 be inserted into downside via opening portion 20a
In bearing cage 23a.Due to internal diameter with inner peripheral surface 20b, 20c, 20d of the canister portion 21 of shell 20 far from opening portion 20a and
It tapers into, therefore in the structure that is integrated of bottom wall part 23 and canister portion 21 of shell 20, by stator unit and can also turn
Subelement is inserted into specified part via opening portion 20a.Since rotor unit is configured to carrier 55a2 of bearing retainer 55
In the upside of upside bearing 51, inner ring 51a is fixed on axis 31, and therefore, in outer ring, 51b is maintained as to protect relative to bearing
It holds in the structure that frame 55 moves along the vertical direction, can be held without decomposing, shell can be inserted into via opening portion 20a
In 20.
Next, the variation of the downside bearing cage 23a of present embodiment is illustrated.With present embodiment
The situation of downside that the carrier 23c of downside bearing cage 23a is arranged on canister portion 23b is compared, in variation, such as Fig. 5 institutes
Show, carrier 23c1 (the 2 times side bearing carriers) is arranged on the upside of canister portion 23b.The lower end of canister portion 23b is radially by riveting
Connect processing.Outer ring 52b is pressed into canister portion 23b, and is processed by the riveting and pressed from both sides together with carrier 23c1 outer ring 52b
Enter, so as to more firmly fixed.
In the assemble method of the structure, since lower side bearing 52 being inserted into from the lower surface of the bottom wall part 23 in shell 20
The configuration status of shell 20 is maintain always into bearing cage 23a, therefore the structure as shown in Fig. 1 etc., it is difficult to will
Each component is inserted into from identical direction and is assembled.But it is inserted into about by lower side bearing 52 from the lower surface of bottom wall part 23
Structure, due to being contacted without the concern for the inner peripheral surface into lower side bearing 52 not with canister portion 21, lower side axle can carried out
It holds on 52 insertion setting, workability is excellent.Therefore, because the internal diameter of canister portion 21 is smaller or 21 upper and lower directions of canister portion
Longer dimension etc., therefore the preferably structure of the variation in the case where being difficult to be inserted into lower side bearing 52 via opening portion 20a.
About the assemble method of the structure, shell 20 is configured to bottom wall part 23 and is in upside and fixes lower side bearing 52, later, is made
Shell 20 inverts, and carries out assemble method similar to the above later.
Also, in the structure shown in Fig. 1 etc., difference in internal diameters is provided with to inner peripheral surface 20c, 20d of the canister portion 21 of shell 20,
But internal diameter can also be made identical.
Each structure of the above embodiment can be appropriately combined in reconcilable range each other.
Label declaration
10：Motor；20：Shell；20a：Opening portion；20A：Control device accepting regions；20b、20c、20d：Inner peripheral surface；
20e：Inclined surface；20f：Table top；21：Canister portion；30：Rotor；31：Axis；40：Stator；55：Bearing retainer；55a：Inside canister portion；
55b：Outer side tube part；55c：Linking part；55d：Intermediate canister portion；55e：Inside linking part；55f：Outside linking part；56a、56b、
57a、65A：Through hole；58、75b：Recess portion；59：Press section；60：Bus bar unit；65：Busbar retainer；100：Control dress
It puts；51：Upside bearing (bearing)；J：Central axis.
Claims (24)
1. a kind of motor is used for torque as defined in the transmission of external driving mechanism, which is characterized in that the motor has：
Rotor has the axis centered on the central axis vertically extended；
Stator, it is arranged opposite radially with the rotor；
Upside bearing supports the upside of the axis；
Lower side bearing supports the downside of the axis；
Bearing retainer keeps the upside bearing；And
Shell in upper side opening, stores the rotor, the stator and the bearing retainer,
The lower end of the axis is protruding to the outside from the shell, for the external drive mechanism transmit as defined in torque,
The shell has：
Shell canister portion stores the rotor, the stator and the bearing retainer；
Outer casing bottom blocks the opening of the downside of the shell canister portion；And
Shell table top, on the inner peripheral surface of the shell canister portion, towards the shell open side and circumferentially,
The shell canister portion the position more upper than the bearing retainer have can store what is be electrically connected with the stator
At least part of control device accepting regions of control device,
The bearing retainer is kept by the inner peripheral surface of the shell canister portion, and the shell deck contact, and with to institute
The upside bearing maintaining part that upside bearing is kept is stated,
The upside bearing maintaining part has：
Upside bearing canister portion, it is chimeric with the outer ring of the upside bearing；And
Upside bearing carrier extends in the upper lateral radially inner side of the upside bearing canister portion,
The outer casing bottom has the downside bearing cage for being kept to the lower side bearing,
In the upside bearing,
The inner ring of the upside bearing is fixed on the shaft,
And the outer ring of the upside bearing can along the vertical direction move, and in institute relative to the upside bearing maintaining part
The force application part for being configured between the upper surface of outer ring and upside bearing carrier and exerting a force along the vertical direction is stated,
In the lower side bearing,
The inner ring of the lower side bearing is fixed on the shaft,
And the downside bearing cage is fixed in the outer ring of the lower side bearing.
2. motor according to claim 1, wherein,
The downside bearing cage has：
Downside bearing canister portion, it is chimeric with the outer ring of the lower side bearing；And
The 1 time side bearing carrier extends in the lower lateral radially inner side of the downside bearing canister portion,
The outer ring of the lower side bearing is contacted with the 1 time side bearing carrier.
3. motor according to claim 1, wherein,
The downside bearing cage has：
Downside bearing canister portion, it is chimeric with the outer ring of the lower side bearing；And
The 2 times side bearing carriers extend in the upper lateral radially inner side of the downside bearing canister portion,
The outer ring of the lower side bearing is contacted with the 2 times side bearing carriers.
4. the motor described in any one in claims 1 to 3, wherein,
The permissible load of the lower side bearing is more than the permissible load of the upside bearing.
5. motor according to claim 1, wherein,
The internal diameter of the shell of the control device accepting regions is more than the described outer of the position of the installation bearing retainer
The internal diameter of shell.
6. the motor described in any one in claim 1 to 5, wherein,
The shell has inclined surface, and the inclined surface is by the inner peripheral surface of the control device accepting regions and installs the bearing guarantor
The inner peripheral surface for holding the position of frame connects in the axial direction.
7. the motor described in any one in claim 1 to 6, wherein,
The internal diameter for installing the shell of the position of the bearing retainer is more than the shell for the position for storing the stator
Internal diameter.
8. the motor described in any one in claim 1 to 7, wherein,
The linear expansion coefficient for forming material of the linear expansion coefficient of the material of the shell with forming the bearing retainer is equal.
9. the motor described in any one in claim 1 to 8, wherein,
The bearing retainer has recess portion and press section, the pressing position in the outer edge of the upper surface of the bearing retainer
In the recess portion radial outside and press the inner peripheral surface of the shell.
10. motor according to claim 9, wherein,
The bearing retainer has penetrates through the through hole of the bearing retainer in an axial direction, at least one recess arrangement in
Near the through hole.
11. motor according to claim 10, wherein,
There is bus bar unit in the upside of the bearing retainer,
The bus bar unit has：
Busbar is connect with the wiring extended from the stator via the through hole of the bearing retainer；And
Busbar retainer keeps the busbar.
12. the motor described in any one in claim 1 to 11, wherein,
The bearing retainer has：
Inside canister portion keeps the bearing；
Outer side tube part, it is chimeric with the inner peripheral surface of the shell；And
Linking part links up the inside canister portion and outer side tube part.
13. motor according to claim 12, wherein,
The linking part has：
Intermediate canister portion, between the inside canister portion and the outer side tube part；
Inside linking part links up the lower end of the intermediate canister portion and the inside canister portion；And
Outside linking part links up the upper end of the intermediate canister portion and the outer side tube part.
14. the motor described in any one in claim 1 to 13, wherein,
There is a part or the control device being integrally contained in the control device accepting regions.
15. a kind of motor, has：
Rotor has the axis centered on the central axis vertically extended；
Stator, it is arranged opposite radially with the rotor；
Bearing supports the axis；
Bearing retainer keeps the bearing；And
Shell in upper side opening, stores the rotor, the stator and the bearing retainer,
The shell has：
Control device accepting regions can store in the position more upper than the bearing retainer and are electrically connected with the stator
Control device at least part；And
Table top, on the inner surface of the shell, towards the opening portion of the shell circumferentially,
The internal diameter of the shell of the control device accepting regions is more than the described outer of the position of the installation bearing retainer
The internal diameter of shell,
The bearing retainer and the deck contact, and there is recess portion in the outer edge of the upper surface of the bearing retainer
And press section, the press section are located at the radial outside of the recess portion and press the inner peripheral surface of the shell.
16. motor according to claim 15, wherein,
The shell has inclined surface, and the inclined surface is by the inner peripheral surface of the control device accepting regions and installs the bearing guarantor
The inner peripheral surface for holding the position of frame connects in the axial direction.
17. the motor according to claims 14 or 15, wherein,
The opening portion of the shell is disposed an outwardly facing on the inner surface of the shell and table top circumferentially,
The bearing retainer and the deck contact.
18. the motor described in any one in claim 15 to 17, wherein,
The internal diameter for installing the shell of the position of the bearing retainer is more than the shell for the position for storing the stator
Internal diameter.
19. the motor described in any one in claim 15 to 18, wherein,
The linear expansion coefficient for forming material of the linear expansion coefficient of the material of the shell with forming the bearing retainer is equal.
20. the motor described in any one in claim 15 to 18, wherein,
The bearing retainer has penetrates through the through hole of the bearing retainer in an axial direction, at least one recess arrangement in
Near the through hole.
21. motor according to claim 20, wherein,
There is bus bar unit in the upside of the bearing retainer,
The bus bar unit has：
Busbar is connect with the wiring extended from the stator via the through hole of the bearing retainer；And
Busbar retainer keeps the busbar.
22. the motor described in any one in claim 15 to 21, wherein,
The bearing retainer has：
Inside canister portion keeps the bearing；
Outer side tube part, it is chimeric with the inner peripheral surface of the shell；And
Linking part links up the inside canister portion and outer side tube part.
23. motor according to claim 22, wherein,
The linking part has：
Intermediate canister portion, between the inside canister portion and the outer side tube part；
Inside linking part links up the lower end of the intermediate canister portion and the inside canister portion；And
Outside linking part links up the upper end of the intermediate canister portion and the outer side tube part.
24. the motor described in any one in claim 15 to 23, wherein,
There is a part or the control device being integrally contained in the control device accepting regions.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-218473 | 2015-11-06 | ||
| JP2015218473 | 2015-11-06 | ||
| PCT/JP2016/079759 WO2017026550A1 (en) | 2015-08-10 | 2016-10-06 | Motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108141113A true CN108141113A (en) | 2018-06-08 |
| CN108141113B CN108141113B (en) | 2020-11-10 |
Family
ID=62388380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680059363.XA Active CN108141113B (en) | 2015-11-06 | 2016-10-06 | Motor with a stator having a stator core |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6844540B2 (en) |
| CN (1) | CN108141113B (en) |
| DE (1) | DE112016004650T5 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113424418A (en) * | 2019-03-06 | 2021-09-21 | 日本电产株式会社 | Motor unit |
| CN113424413A (en) * | 2019-03-28 | 2021-09-21 | 日本电产株式会社 | Motor |
| CN113439378A (en) * | 2019-03-28 | 2021-09-24 | 日本电产株式会社 | Motor |
| CN114243983A (en) * | 2018-09-28 | 2022-03-25 | 日本电产株式会社 | Motor unit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020085744A1 (en) * | 2018-10-22 | 2020-04-30 | 엘지이노텍 주식회사 | Motor |
| CN113726073A (en) * | 2020-05-26 | 2021-11-30 | 日本电产株式会社 | Motor and electric product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114243983A (en) * | 2018-09-28 | 2022-03-25 | 日本电产株式会社 | Motor unit |
| CN113424418A (en) * | 2019-03-06 | 2021-09-21 | 日本电产株式会社 | Motor unit |
| CN113424413A (en) * | 2019-03-28 | 2021-09-21 | 日本电产株式会社 | Motor |
| CN113439378A (en) * | 2019-03-28 | 2021-09-24 | 日本电产株式会社 | Motor |
| CN113439378B (en) * | 2019-03-28 | 2023-10-27 | 日本电产株式会社 | Motor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112016004650T5 (en) | 2018-07-19 |
| JPWO2017026550A1 (en) | 2018-09-06 |
| JP6844540B2 (en) | 2021-03-17 |
| CN108141113B (en) | 2020-11-10 |
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