CN110154744A - In-wheel motor drive unit - Google Patents
In-wheel motor drive unit Download PDFInfo
- Publication number
- CN110154744A CN110154744A CN201810346465.0A CN201810346465A CN110154744A CN 110154744 A CN110154744 A CN 110154744A CN 201810346465 A CN201810346465 A CN 201810346465A CN 110154744 A CN110154744 A CN 110154744A
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- China
- Prior art keywords
- bolt
- drive unit
- motor drive
- hub
- wheel
- 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.)
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- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 238000013316 zoning Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 description 20
- 238000007789 sealing Methods 0.000 description 5
- 230000008450 motivation Effects 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0061—Disposition of motor in, or adjacent to, traction wheel the motor axle being parallel to the wheel axle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Gear Transmission (AREA)
- General Details Of Gearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The present invention provides a kind of in-wheel motor drive unit for being able to use existing hub bearing.In-wheel motor drive unit (10) includes hub spindle bearing portion (11), motor rotation axis, hub attachment (61), wherein, the hub spindle bearing portion (11) has inner ring (12), outer ring (13), the multiple rolling elements for the annular gap configured in inner ring and outer ring, hub spindle bearing portion (11) is housed in the inner space area of the bogie wheel (W) of wheel, the motor rotation axis drives inner ring, the hub attachment is than wheel rim (W) more path and is accommodated in inner space area, hub attachment is fixed in outer ring (13) by the first bolt (62), main body shell (39) are fixed in by the second bolt (15).
Description
Technical field
A kind of in-wheel motor drive unit the present invention relates to configuration in the inside of wheel, in particular to a kind of rotation is certainly
Such as support the hub spindle bearing portion for being connected to the hub wheel of wheel.
Background technique
In No. 5872358 bulletins (patent document 1) of Japanese Patent Publication No., the in-wheel motor of referred to as driving unit has
Inner ring in conjunction with the wheel rim of wheel and the bear box by rolling element bearing inner ring.These Internal and external cycles constitute hub bearing.Specially
The bear box of sharp document 1 is fixed in knuckle by bolt.In addition, the reducer shell of in-wheel motor is also by bolt
It is fixed in knuckle.
The in-wheel motor disclosed in Japanese Unexamined Patent Publication 2016-187252 bulletin (patent document 2) has and wheel knot
The inner ring of conjunction and cycle component by rolling element bearing inner ring.These Internal and external cycles constitute hub bearing.The outer ring of patent document 2
Component is directly fixed on reduction part shell by bolt.
Existing technical literature
Patent document
Patent document 1: No. 5872358 bulletins of Japanese Patent Publication No.
Patent document 2: Japanese Unexamined Patent Publication 2016-187252 bulletin
In patent document 1, on the outside of axis direction, reducer shell is configured in axis direction for bear box configuration
Side has knuckle between bear box and reducer shell.As a result, on the axis direction of in-wheel motor, patent document 1
Knuckle axis direction thickness it is larger, there is the axis direction ruler by keeping knuckle thinner so as to shorten in-wheel motor
Very little leeway.
In patent document 2, on the outside of axis direction, reduction part shell is configured in axis direction for cycle component configuration
Side, the bolt perforation cycle component extended to axis direction simultaneously screw togather reduction part shell.Therefore, in cycle component and reduction part shell
Any component is not present between body, shortens the axis direction size of in-wheel motor.But there are the axis weights that wheel is born
The case where being entered reduction part shell.As a result, there is reduction part shell to deform, be supported in and subtract inside reduction part
A possibility that dislocation of gear shaft, the noise of in-wheel motor and the vibration of fast portion's shell deteriorate.
As a countermeasure, the wall thickness of the reduction part shell of patent document 2, but the axis direction of in-wheel motor can be increased
Size will also increase.As other countermeasures, the diameter dimension of inner ring and outer ring component can be increased and increase the section of hub bearing
Circular diameter (PCD) or bolt shifting is set to outside diameter, but due to needing to carry out special design to hub bearing, will lead to
The raising of cost.
Summary of the invention
In view of above-mentioned truth, the purpose of the present invention is to provide one kind, and the pitch diameter of hub bearing not to be made to change, can make
With the in-wheel motor drive unit of existing hub bearing.
(means for solving technical problem)
To achieve the goals above, in-wheel motor drive unit of the invention includes: hub spindle bearing portion, is had interior
Circle, outer ring, configuration the annular gap of inner ring and outer ring multiple rolling elements, in the hub spindle bearing portion is configured in and is fixed on
The inner space area of the wheel rim of circle；Motor part drives inner ring；And hub attachment, it more path and is received than wheel rim
It is dissolved in inner space area, the hub attachment is fixed in outer ring by the first bolt, is fixed in receipts by the second bolt
The shell of the motor rotation axis in capacitor induction motor portion.
According to the present embodiment, hub attachment is fixed in outer ring by the first bolt in one side, logical in its other side
It crosses the second bolt and is fixed in shell, outer ring is not directly fixed on shell as a result,.Therefore, axis will not be entered shell again,
The dislocation of motor rotation axis and gear shaft will not be generated.In addition, since outer ring by hub attachment is fixed in shell, because
This also can be by increasing hub attachment even if not increasing the diameter dimension of outer ring and the pitch diameter (PCD) of hub bearing
Diameter dimension is to configure the second bolt in the position of diameter side more outward than outer ring.Therefore, existing hub spindle can be passed through
It manufactures and makes in-wheel motor drive unit, in cost advantageously.Alternatively, hub spindle bearing portion can be made smaller than the prior art
Diameter.In addition, the head of the first bolt and/or the second bolt is directed toward on the outside of vehicle width direction, axle portion is directed toward on the inside of vehicle width direction,
Thereby, it is possible to install or remove on the outside of vehicle width direction to hub attachment and/or hub spindle bearing portion, in-wheel motor is improved
The assembly working of driving device or the working efficiency of disintegration.According to the present invention, even if in the shape of outer ring and the shape of shell
Shape does not correspond in the case where can not binding directly the two, can also tie indirectly by hub attachment therebetween
It closes.
The shell of receiving motor rotation axis also accommodates the rotor and stator of motor part, but can also accommodate other structures
Part, such as the retarder structure being made of multiple gears and rotating element.Motor part can also be abutted reduction part is set, makes electricity
The shell in motivation portion and the shell of reduction part are common, wherein the rotation that the reduction part exports motor rotation axis is slowed down simultaneously
It is transferred to inner ring.In this case, hub attachment is fixed in the shell or reduction part of motor part by second bolt
Shell.The positional relationship of first and second bolts is not particularly limited.In a kind of form of the invention, with hub bearing
Centered on the axis in portion, the second bolt is configured in the position of diameter side more outward than the first bolt.According to the form, can make outer
The outer diameter of circle is smaller than the outer diameter of hub attachment.
As currently preferred form, in-wheel motor drive unit further includes reduction part, and the reduction part, which has, to be connected
It is connected to the input shaft of motor rotation axis, the output shaft for the inner ring for being connected to hub spindle bearing portion and the output in conjunction with output shaft
Gear, the rotation of input shaft is slowed down and is transferred to output shaft by reduction part, from the axis direction of hub spindle bearing portion, first
Bolt is configured in a manner of be overlapped with output gear.According to the form, the outer diameter of outer ring can be made than the outer diameter of output gear
It is smaller, hub spindle bearing portion path in diametrical direction can be made.In addition, " from the axis direction of hub spindle bearing portion, the
One bolt is configured in a manner of be overlapped with output gear " refer to, it is less than from axis to the distance of the first bolt with the axis and is
The radius of the outside circle of the output gear of the heart.
The form further preferred as the present invention, from the axis direction of hub spindle bearing portion, the configuration of the second bolt
In the position of diameter side more outward than output gear.According to the form, the second bolt being circumferentially spaced from be configured
It is multiple.In addition, the internal thread hole screwed togather with the second bolt is far from output gear, thereby, it is possible to make to be formed with the internal thread hole
Housing parts are thicker than other housing parts, can locally increase the rigidity of shell.Thus, it is supposed that even if axis re-transmission is handed to the
Two bolts can also prevent the deformation of shell.In addition, " from the axis direction of hub spindle bearing portion, the configuration of the second bolt exists
The position of diameter side more outward than output gear " refers to, is greater than from axis to the distance of the second bolt defeated centered on the axis
The radius of the outside circle of gear out.
As a kind of form of the invention, chimeric with the shell and output shaft with reduction part of hub attachment is coaxially positioned.
According to the form, in the assembly working of in-wheel motor drive unit, hub attachment positions naturally relative to shell, because
This, makes the more efficient of assembly working.In addition, improving assembly precision.As the chimeric of hub attachment and shell, such as pass through
Embedding inlay technique makes the recess portion of the two and protrusion be fitted into and be assembled.
As a kind of form of the invention, chimeric with the shell and output shaft with reduction part in outer ring is coaxially positioned.According to
The form, in the assembly working of in-wheel motor drive unit, outer ring positions naturally relative to shell, therefore, makes group
Fill the more efficient of work.It is chimeric simultaneously as the chimeric of outer ring and shell, such as by the protrusion recess portion と that embedding inlay technique both makes
It is assembled.
As a kind of form of the invention, in-wheel motor drive unit further includes brake disc, and brake disc is in outer diameter zone
With drag friction face, the inner diameter zone of brake disc is fixed in the inner ring of hub spindle bearing portion, in the first bolt and the second bolt
At least part configure and in the drag friction face than brake disc more lean on the position of internal side diameter.According to the form, can make to take turns
Hub axle bearing portion is in diametrically path.As the form, such as from the axis direction of hub spindle bearing portion, brake disc
Inner diameter zone and the overlapping of at least part of the first bolt or the second bolt.Configuration is more leaned in the drag friction face than brake disc
The item number of the bolt of internal diameter side position is not particularly limited.Either side in first bolt and the second bolt can also be matched
It sets in the position for more leaning on internal side diameter than drag friction face.
As a kind of form of the invention, axis direction side is more being leaned in the inner diameter zone configuration of brake disc than outer diameter zone
Position, brake disc also has the circular step of connection these inner diameter zones and outer diameter zone, circular step and inner diameter zone structure
At the cap portion of the inner space area of zoning cylindrical shape, at least part in the first bolt and the second bolt is configured in hat shape
The inner space area in portion.According to the form, axis direction position and the first bolt or the second bolt of brake disc can be made
Axis direction position overlapping.Therefore, the path in the axial direction of the in-wheel motor drive unit comprising brake disc can be made
Change.In addition, " at least part of the first bolt and the second bolt " refers to that bolt end, such as bolt head are housed in cap
The inner space area in shape portion.In the type of the bolt of the inner space area of cap portion, item number special limit is not done to configuration
It is fixed.Either side in first bolt and the second bolt can also be configured in the inner space area of cap portion.
(invention effect)
According to the above-mentioned present invention, in-wheel motor drive unit can be manufactured using existing hub bearing.In addition, axis
Weight will not be directly input into shell from hub bearing, can prevent the deformation of shell.
Detailed description of the invention
Fig. 1 is the expansion cross-sectional view for indicating the in-wheel motor drive unit of one embodiment of the present invention.
Fig. 2 is the cross-sectional view for showing schematically the inside of same embodiment.
Fig. 3 is the main view for showing schematically same embodiment.
Fig. 4 indicates the longitudinal sectional view of the hub spindle bearing portion of same embodiment.
Symbol description:
10, in-wheel motor drive unit
11, hub spindle bearing portion
12, inner ring
12f, engaging portion
13, outer ring
13b, outer peripheral surface
13g, outer ring protruding portion
14, rolling element
15, the second bolt
21, motor part
22, motor rotation axis
23, rotor
24, stator
29, motor field frame
31, reduction part
32, input shaft
33, input gear
37, output gear
38, output shaft
39, main body shell
39c, cylindrical portion
39f, front portion
39g, wall thickness part
39h, through hole
39p, opening
61, hub attachment
61c, central area
61g, protruding portion
61i, circular conical surface
62, the first bolt
BD, brake disc
BH, circular step
M, N, O, axis
W, bogie wheel (wheel rim).
Specific embodiment
Below according to the attached drawing embodiment that the present invention will be described in detail.Fig. 1 is the wheel for indicating one embodiment of the present invention
The expansion cross-sectional view of built-in motor driving device.Indicate that on the inside of vehicle width direction (inner disc side), paper is left in Fig. 1, on the right side of paper
Side indicates on the outside of vehicle width direction (external disk side).In addition, the section indicated in Fig. 1 be by Fig. 2 and it is shown in Fig. 3 comprising axis M and
The plane of axis N and plane comprising axis N and axes O are with the expansion plane after the sequential connection.
Fig. 2 is the cross-sectional view for indicating the signal of inside of same embodiment, is indicated in the II-II cutting wheel in Fig. 1
Motor drive and from arrow direction section state.Fig. 3 is the main view for showing schematically same embodiment,
The state of in-wheel motor drive unit from indicating on the outside of vehicle width direction.It is complicated in order to avoid attached drawing, with tooth in Fig. 2
Tip circle indicates each gear.In figure 2 and figure 3, paper right side indicates rear of vehicle, expression vehicle front on the left of paper, on paper
Side indicates vehicle up direction, indicates below vehicle on the downside of paper.In figure 2 and figure 3, from axes O direction, on the outside of vehicle width direction
(external disk side) is observed to (inner disc side) on the inside of vehicle width direction.
Fig. 4 is the longitudinal sectional view for indicating the hub spindle bearing portion of same embodiment, and expression is cutd open with the plane comprising axes O
Cutting plane after cutting hub spindle bearing portion.It is complicated in order to avoid attached drawing, in Fig. 4, only indicate brake disc and bogie wheel (wheel rim)
Half.
As shown in Figure 1, in-wheel motor drive unit 10 includes the hub bearing that the center of wheel (not shown) is arranged in
Portion 11, the rotation of motor part is slowed down and is transferred to the reduction part 31 of hub spindle bearing portion 11 at the motor part 21 for driving wheel.
Motor part 21 and reduction part 31 are offsettingly configured from the axes O of hub spindle bearing portion 11.Axes O extends to vehicle width direction, with vehicle
Axis is consistent.On the position of axes O direction, hub spindle bearing portion 11 is configured in the axis direction side of in-wheel motor drive unit 10
(external disk side), motor part 21 are configured in the axis direction other side (inner disc side) of in-wheel motor drive unit 10, reduction part
31 configurations are in the position for more leaning on axis direction side than motor part 21, the axis direction position of reduction part 31 and hub spindle bearing portion
11 axis direction position overlapping.
In-wheel motor drive unit 10 is the Vehicular electric machine actuating device for driving the wheel of electric car.Electricity in wheel
Motivation driving device 10 is connected to vehicle body (not shown).In-wheel motor drive unit 10 can make electric car with speed per hour 0~
The speed of 180km/h travels.
Hub spindle bearing portion 11 is temperature of inner ring during rotation, fixed outer ring, is had as the rotation circle in conjunction with wheel rim (not shown)
The inner ring 12 of (hub wheel), as the outside diameter for being coaxially arranged at inner ring 12 fast pulley outer ring 13, configuration in 12 and of inner ring
Multiple rolling elements 14 of annulus between outer ring 13.
Referring to Fig.1, outer ring 13 is formed through the opening 39p in the front portion 39f of main body shell 39.Main body shell 39 is
The shell of gabarit comprising reduction part 31 accommodates the rotating element of reduction part 31.Front portion 39f is covering main body shell 39
In reduction part 31 one side of axes O direction housing wall portion.In front portion 39f, along the open edge shape of opening 39p
At there is cylindrical portion 39c.The outer wall of cylindrical portion 39c from front portion 39f are prominent towards axes O direction side.The length outstanding
Degree is bigger, and the axis direction length for the 39p that is open is bigger.
On the outer peripheral surface of outer ring 13, multiple outer ring protruding portion 13g are additionally provided on the different location of circumferencial direction.Outside
Ratio outer ring protruding portion 13g in circle 13 more depends on the opening 39p of the cylinder area insertion front portion 39f of the axes O direction other side.
At this moment, the axes O direction another side of outer ring protruding portion 13g abuts the top of cylindrical portion 39c, and outer ring 13 is in axes O side as a result,
Upward position is positioned.
Additional information herein can make the outer diameter of the outer peripheral surface 13b of the axes O direction other side of outer ring 13 referring to Fig. 4
Size is roughly the same with the opening inner diameter size of 39p, and outer ring 13 is made to be completely embedded into opening 39p.Here, outer peripheral surface 13b and
The chimeric of opening 39p is also possible to be fitted close (tight mating).Like this, embedding by outer ring 13 and main body shell 39
It closes, hub spindle bearing portion 11 and the output shaft 38 of reduction part 31 are coaxially positioned.
Through hole 13h is equipped in each outer ring protruding portion 13g outstanding to the outer direction.In addition, in outer ring protruding portion 13g
The axes O direction other side be adjacently configured with hub attachment 61.Hub attachment 61 have centre bore, the centre bore inserted with
The cylindrical portion 39c of main body shell 39.At this moment, the outer peripheral surface of cylindrical portion 39c is chimeric with the inner peripheral surface 61n of hub attachment 61.Wheel hub
Attachment 61 is located between each outer ring protruding portion 13g of axes O direction side and the front portion 39f of the axes O direction other side.
Multiple internal thread hole 61f are formed in hub attachment 61.Internal thread hole 61f is formed in the internal side diameter of hub attachment 61
Part, in circumferencial direction spaced apartly configured with multiple.Each internal thread hole 61f of hub attachment 61 and each perforation of outer ring 13
Hole 13h is extended parallel to axes O, consistent with each other.Through hole 13h and hub attachment from the lateral outer ring 13 in axes O direction one
61 internal thread hole 61f is through with the first bolt 62, and the through hole 13h of the axle portion perforation outer ring 13 of the first bolt 62 is simultaneously screwed together in
The head of the internal thread hole 61f of hub attachment 61, the first bolt 62 abut outer ring protruding portion 13g.Outer ring 13 passes through first as a result,
Bolt 62 is reliably fixed on hub attachment 61.
Inner ring 12 is to penetrate through the centre bore of outer ring 13 than the longer cylinder-like body in outer ring 13.Electric into wheel from outer ring 13
One side end of axes O direction of the outside of motivation driving device 10 inner ring 12b outstanding is formed with engaging portion 12f.Engaging portion 12f
It is the protrusion being arranged spaced apartly in a circumferential direction, engaging portion 12f is constituted and coaxially combined brake disc BD and (not shown)
The engaging portion of wheel.Inner ring 12 combines the bogie wheel of wheel on the 12f of engaging portion, rotates integrally with wheel.
Annulus between inner ring 12 and outer ring 13 is configured with multiple row rolling element 14.In the axes O direction of inner ring 12
The outer peripheral surface of part is entreated to constitute configuration in the inner track face of multiple rolling elements 14 of first row.In the axes O direction of inner ring 12
End side periphery is chimeric inner track circle 12r.The outer peripheral surface of inner track circle 12r constitutes configuration in the multiple of secondary series
The inner track face of rolling element 14.The inner peripheral surface of one side end of axes O direction of outer ring 13 constitutes the rolling element 14 of first row
Outer side track face.The inner peripheral surface of the axes O direction end side of outer ring 13 constitutes the outer side track of the rolling element 14 of secondary series
Face.Annulus between inner ring 12 and outer ring 13 also has sealing element 16.The both ends in 16 sealing ring space of sealing element, resistance
The only intrusion of dust and foreign matter.To the output shaft of the centre bore insertion reduction part 31 of another side in the axes O direction of inner ring 12
It 38 and is fitted into.Described be fitted into is that spline is chimeric or sawtooth is chimeric.When carry out spline it is chimeric when, forbid inner ring 12 and output shaft 38
Relative rotation, but there is diametrical clearance between inner ring 12 and output shaft 38, which allows 12 He of inner ring
Output shaft 38 relatively tilts on several bending angle.
Fig. 3 indicates the bogie wheel W of the brake disc BD and wheel that are combined with the inner ring 12 of in-wheel motor drive unit 10.Wheel
Built-in motor driving device 10 is accommodated in the inner space area of bogie wheel W.But motor part 21 can also be from bogie wheel
The inner space area of W is prominent to vehicle width direction inside.
The outer diameter of inner ring 12 is maximum in the 12f of engaging portion, between engaging portion 12f, 12f adjacent in a circumferential direction most
It is small.The outer diameter of outer ring 13 is in outer ring protruding portion 13g maximum.The outer diameter of outer ring 13 outer ring protruding portion adjacent in a circumferential direction
It is minimum between 13g, 13g.Inner ring 12 and the maximum outside diameter of outer ring 13 are smaller than the internal diameter of bogie wheel W.
Hub attachment 61 shown in Fig. 3 is formed with protruding portion 61g outstanding to the outer direction.Protruding portion 61g is in circumference
Direction is spaced apartly configured with multiple.In the present embodiment, protruding portion 61g attenuates towards outside diameter, and hub attachment 61 is
Star.In axes O, protruding portion 61g is located at the position of diameter side more outward than outer ring protruding portion 13g.Hub attachment 61 compares as a result,
The more major diameter of outer ring 13.
As shown in Figure 1 and Figure 4, in each protruding portion 61g, it is formed with the internal thread hole 61h extended parallel to axes O.
The front portion 39f of another side position in axes O direction is more leaned on to be formed with through hole 39h than hub attachment 61 being located at.Through hole
39h and internal thread hole 61h is extended parallel to and consistent with each other with axes O.Internal screw thread is formed in internal thread hole 61h.From axis
Another lateral through hole 39h in the direction line O penetrates through the second bolt 15, the front end of the second bolt 15 and the internal screw thread of through hole 61h
It screws togather.As a result, by the second bolt 15, hub attachment 61 is reliably mounted on main body shell 39.
In addition, omitting the second bolt 15 in Fig. 3, through hole 61h is indicated.It can also be in multiple through hole 61h, 61h ...
It is several be not provided with internal screw thread, and internal screw thread is set in through hole 39h, makes the perforation perforation of the second bolt from axes O direction side
Hole 61h and the internal screw-thread screw for making itself and through hole 39h.
In the present embodiment, the tightening sequence of the first bolt 62 and the second bolt 15 is not particularly limited.
The wall thickness of main body shell 39 is generally uniform, but the wall unevenness of front portion 39f is even, forms the portion of through hole 39h
Divide and is formed thicklyer than other parts.Position of the wall thickness part 39g configuration in diameter side more outward than aftermentioned output gear 37
It sets.
As shown in figure 3, hub attachment 61 is the star of the rotational symmetry centered on axes O, for most in protruding portion 61g
Big outer diameter is minimum outer diameter between adjacent in a circumferential direction protruding portion 61g, 61g.The maximum outside diameter ratio of hub attachment 61
The internal diameter of bogie wheel W is smaller, is accommodated in the inner space area (Fig. 4) of bogie wheel W together with hub spindle bearing portion 11.
First bolt 62 is centered on axes O in a circumferential direction equally spaced configured with multiple.Second bolt 15 also phase
Together.In the axes O at center for becoming hub spindle bearing portion 11, the second bolt 15 is configured in diameter side more outward than the first bolt 62
Position.The outside circle of output gear 37 is represented by dotted lines in Fig. 3.First bolt 62 is configured in the outside circle than output gear 37
The position for more leaning on internal side diameter, looks up from axes O side, Chong Die with output gear 37.On the other hand, the second bolt 15 is matched
Set the position in the more outward diameter side of the outside circle than output gear 37.
Additional information is carried out to hub attachment 61, one side end face of axes O direction of central area 61c abuts outer ring protruding portion
Another side end face in axes O direction of 13g.Another side end face in axes O direction of central area 61c it is opposed with front portion 39f or
Person is in contact.The internal thread hole screwed togather with the first bolt 62 is formed in central area 61c.Therefore, central area 61c and outer ring are prominent
Portion 13g is combined out.In addition, the axes O direction position of protruding portion 61g and the axes O direction position overlapping of outer ring protruding portion 13g.
The head of first bolt 62 abuts one side end face of axes O direction of outer ring protruding portion 13g.The head of second bolt 15
Abut one side end face of axes O direction of protruding portion 61g.Moreover, axes O direction position and second spiral shell on the head of the first bolt 62
The axes O direction position on the head of bolt 15 is overlapped.
The engaging portion 12f and outer ring protruding portion 13g of inner ring 12 are separated on axes O direction, and the head of the first bolt 62 is matched
It sets between engaging portion 12f and outer ring protruding portion 13g.The brake disc BD of engaging portion 12f is fixed on circular step BH
As boundary, include outer diameter zone and inner diameter zone.Inner diameter zone configuration is configured in axes O direction side, outer diameter zone in axis
The direction the line O other side.The both ends of the surface of outer diameter zone become rubbing surface.Inner diameter zone and circular step BH constitute cap portion.Hat shape
The inner space area of portion's zoning cylindrical shape.Engaging portion 12f, the head of the first bolt 62, the second bolt 15 header arrangement exist
The position of internal side diameter is more leaned on than circular step BH, as a result, the head of engaging portion 12f, the head of the first bolt 62, the second bolt 15
It is accommodated in the inner space area of cap portion.Therefore, it is configured in the axes O side of the component of the inner space area of cap portion
It is overlapped to position and the axes O direction position of the outer diameter zone of brake disc BD, is conducive to shorten axes O direction size.
It is accommodated in the inner space area of bogie wheel W completely with dashdotted oval the second bolt 15 surrounded in Fig. 4
Domain.In addition, the second bolt 15 forms longer than the first bolt 62.Moreover, the axes O direction position and second of the first bolt 62
The axes O direction position of bolt 15 is overlapped.In addition, the axes O side of the axes O direction position of output gear 37 and the second bolt 15
It is overlapped to position.
The outer peripheral surface 13b of another side region in axes O direction of outer ring 13 is chimeric with the opening inner peripheral surface of 39p.In outer peripheral surface
13b is formed with endless groove, is configured with sealing element 65 in the endless groove.Sealing element 65 is such as O-ring seals, in circumference entirety
The upper inner circumferential face contact with opening 39p, the gap between the inner peripheral surface and outer peripheral surface 13b of sealed opening 39p.
As shown in Figure 1, motor part 21 has motor rotation axis 22, rotor 23, stator 24, motor casing 25, and
It is sequentially configured in order from the axis M of motor part 21 to outside diameter with this.Motor part 21 is the diameter of internal rotor, external stator form
It to gap motor, but may be other forms.For example, motor part 21 (not shown) or axial gap motor.Electricity
The periphery of the encirclement stator 24 of motivation shell 29.The back part of the direction axis M one side and main body shell 39 of motor field frame 29
39b is divided to combine.Another side in the direction axis M of motor field frame 29 is sealed by the motor field frame outer cover 29v of plate.Back part
Dividing 39b is the housing wall portion for covering the direction axis M (axes O direction) another side of the reduction part 31 in main body shell 39.
Main body shell 39 and motor field frame 29 constitute shell, which constitutes the outer of in-wheel motor drive unit 10
It is wide.In the following description, a part of main body shell 39 and motor field frame 29 is also referred to as shell.
The stator core 25 and the coil 26 in the stator core 25 that stator 24 includes cylindrical shape.Stator core
25 by the way that cricoid steel plate to be laminated to the direction axis M.
The both ends of motor rotation axis 22 are rotatably freely supported in main body shell 39 by rolling bearing 27,28
The motor field frame outer cover 29v of back portion 39b and motor part 21.In addition to one side of axis direction in motor rotation axis 22
Portion 22e, its major part are configured in motor field frame 29.One side end 22e of axis direction is configured in main body shell 39.?
That is motor rotation axis 22 is accommodated in the shell of in-wheel motor drive unit 10.
Axis M as motor rotation axis 22 and the rotation center of rotor 23 is parallel with the axes O of hub spindle bearing portion 11
Ground extends.That is, motor part 21 is offsettingly configured in a manner of the axes O far from hub spindle bearing portion 11.Such as Fig. 2 institute
The axis M for the motor part shown offsettingly is configured from axes O to vehicle front-rear direction, specifically, is configured more than axes O
Close to the position of vehicle front.
Reduction part 31 have input shaft 32, input gear 33, multiple intermediate gears 34,36, jackshaft 35, output shaft 38,
Output gear 37, main body cover 39, wherein the input shaft 32 and the motor rotation axis 22 of motor part 21 are coaxially tied
It closes, the input gear 33 is placed coaxially on the outer peripheral surface of input shaft 32, the jackshaft 35 and the intermediate gear 34,36
Center combine, the output shaft 38 connects the inner ring 12 of hub spindle bearing portion 11, and the output gear 37 is placed coaxially on defeated
The outer peripheral surface of shaft 38, the main body cover 39 accommodate the multiple gear and rotary shaft.Slow down since main body shell 39 is constituted
The gabarit in portion 31, therefore also referred to as main body shell 39 is reduction part shell.
Input gear 33 is the helical gear of external tooth.Input shaft 32 is hollow structure, to hollow hole 32h insertion motor rotation
The one side end 22e of axis direction of shaft 22 simultaneously makes its non-rotatably chimeric (also chimeric comprising sawtooth, following phase of spline relatively
Together).Input shaft 32 is rotatably freely supported in body shell in two end sides of input gear 33, by rolling bearing 32a, 32b
The front portion 39f and back portion 39b of body 39.
The axis N of the rotation center of jackshaft 35 as reduction part 31 is extended parallel to axes O.The two of jackshaft 35
End is rotatably freely supported in the front portion 39f and back portion 39b of main body cover 39 by rolling bearing 35a, 35b.
In the direction the axis N position end side of jackshaft 35, it is coaxially disposed the first intermediate gear 34.In the axis of jackshaft 35
The direction line N middle section, has been coaxially disposed the second intermediate gear 36.
Additional information herein is formed with recess portion in another side end face in the direction axis N of the first intermediate gear 34, described
Bearing 35b is accommodated in recess portion.The axis N of the flank of tooth of the direction the axis N position of bearing 35b and the first intermediate gear 34 as a result,
The overlapping of direction position, shortens the length of jackshaft 35.
First intermediate gear 34 and the second intermediate gear 36 are the helical gears of external tooth, and the diameter of the first intermediate gear 34 is than
The diameter of two intermediate gears 36 is big.First intermediate gear 34 of major diameter is configured in than the second intermediate gear 36 more by the axis side N
To the other side position, engaged with the input gear 33 of path.Second intermediate gear 36 of path is configured in than first
Between gear 34 more lean on the direction axis N side position, engaged with the output gear 37 of major diameter.
As shown in Fig. 2, the axis N of jackshaft 35 is configured in the position more closer to the top than axes O and axis M.In in addition,
Between the axis N of axis 35 be configured in the position than axes O closer to vehicle front and than axis M closer to rear of vehicle.Subtract
Fast portion 31 is parallel with the axes O extended parallel to each other, three axis of N, M configured on vehicle front-rear direction spaced apartly
Shaft gear retarder carries out two stage speed change.
It returns to Fig. 1 to be illustrated, output gear 37 is the helical gear of external tooth, is placed coaxially on the axes O of output shaft 38
Center portion.Output shaft 38 extends along axes O.One side end in the axes O direction of output shaft 38 is inserted into inner ring 12
Centre bore is simultaneously non-rotatably fitted into relatively.The axes O direction center portion of output shaft 38 is than outer peripheral surface 13b shown in Fig. 4
More outward the position of diameter side, be rotatably freely supported in by rolling bearing 38a the front portion 39f of main body shell 39.It is defeated
The axes O direction end side of shaft 38 is rotatably supported in the back side of main body shell 39 by rolling bearing 38b such as
Part 39b.
As shown in Figure 1, engagement, the i.e. input gear 33 and first of the driven gear by the driving gear and major diameter of path
The engagement of intermediate gear 34 or the engagement of the second intermediate gear 36 and output gear 37, reduction part 31 is by the rotation of input shaft 32
Turn to slow down and is transferred to output shaft 38.Constituting slave input shaft 32 to the rotating element of output shaft 38 by motor in reduction part 31
The rotation in portion 21 is transferred to the driving transmission path of inner ring 12.
Main body shell 39 also includes barrel other than above explained front portion 39f and back portion 39b.
The barrel covers the internal component of reduction part 31 in a manner of surrounding the axes O extended parallel to each other, N, M.Plate
Front portion 39f covers the internal component of reduction part 31 from axis direction side, in conjunction with a side of barrel.Plate
Back portion 39b covers the internal component of reduction part 31 from the axis direction other side, in conjunction with another side of barrel.It is main
The back portion 39b of body shell body 39 is inner space and the motor part 21 that reduction part 31 is combined and separated with motor field frame 29
Inner space next door.Motor casing 29 is supported in main body shell 39, from main body shell 39 to the another of axis direction
Side is prominent.
The inner space of 39 zoning reduction part 31 of main body shell, by all rotating elements (rotary shaft and the tooth of reduction part 31
Wheel) it accommodates to inner space.The lower part of main body shell 39 shown in Fig. 2 becomes oil storage unit 41.The height and position of oil storage unit 41 with
The height and position of the lower part of motor part 21 is overlapped.It is stored in the oil storage unit 41 of the lower part for the inner space for occupying main body shell 39
There is the lubricating oil of lubrication motor part 21 and reduction part 31.
Input shaft 32, jackshaft 35, output shaft 38 are by the rolling bearing by two supports.These rolling bearings 32a,
35a, 38a, 32b, 35b, 38b are transverse bearing.
When providing electric power to the coil 26 from the outside of in-wheel motor drive unit 10, the rotor of motor part 21
23 rotations, rotation is exported from motor rotation axis 22 to reduction part 31.Reduction part 31 will be entered input shaft from motor part 21
32 rotation is slowed down and is exported from output shaft 38 to hub spindle bearing portion 11.The inner ring 12 of hub spindle bearing portion 11 with 38 phase of output shaft
Same revolving speed rotation, driving are fixed on the wheel (bogie wheel W) (not shown) of inner ring 12.
In addition, the in-wheel motor drive unit 10 of present embodiment includes hub spindle bearing portion 11, motor part 21, slows down
Portion 31, hub attachment 61, wherein hub spindle bearing portion 11 have inner ring 12, outer ring 13, configuration inner ring 12 and outer ring 13 ring-type
Multiple rolling elements 14 in gap, and it is accommodated in the inner space area for being fixed on the bogie wheel W of inner ring 12, motor part 21 is defeated
It rotates out, the rotation that motor part 21 exports is slowed down and is transferred to inner ring 12 by reduction part 31, and hub attachment 61 is more than bogie wheel W
Path is housed in the inner space area of bogie wheel W, is fixed on outer ring 13 by the first bolt 62, passes through the second spiral shell
Bolt 15 is fixed on the main body shell 39 of reduction part 31.
According to the present embodiment, hub attachment 61 is fixed in outer ring 13 by the first bolt 62 in one side, another at it
Side is fixed in main body shell 39 by the second bolt 15, and outer ring 13 will not be directly fixed on main body shell 39 as a result,.Cause
This, axis weight will not be entered the shell of in-wheel motor drive unit 10, will not generate motor rotation axis 22 and jackshaft 35
The dislocation of (gear shaft).In addition, since outer ring 13 by hub attachment 61 is fixed in main body shell 39, even if not increasing
The big diameter dimension of outer ring 13 and the pitch diameter (PCD) of hub spindle bearing portion 11, also can be by increasing the straight of hub attachment 61
Diameter size is to configure the second bolt 15 in the position of diameter side more outward than outer ring 13.It therefore, can be by existing hub spindle
It holds for hub spindle bearing portion 11 and manufactures in-wheel motor drive unit 10, in cost advantageously.Alternatively, wheel hub can be made
The more path than the prior art of bearing portion 11.In addition, the head of the first bolt 62 and the second bolt 15 is directed toward on the outside of vehicle width direction,
The axle portion of first bolt 62 and the second bolt 15 is directed toward on the inside of vehicle width direction, and thereby, it is possible to attached to wheel hub from axes O direction side
Part 61 and hub spindle bearing portion 11 are installed or removed.Therefore, in-wheel motor driving dress can be carried out on the outside of vehicle width direction
The assembly working or disintegration set, improve work efficiency.
In addition, centered on the axes O of hub spindle bearing portion 11, since the second bolt 15 is configured more than the first bolt 62
By the position of outside diameter, therefore, the maximum outside diameter of outer ring 13 can be made smaller than the maximum outside diameter of hub attachment 61.
In addition, as shown in figure 3, reduction part 31 has the output shaft 38 coaxially connecting with inner ring 12 and is placed coaxially on
The output gear 37 of output shaft 38, looks up from the axes O side of hub spindle bearing portion 11, the first bolt 62 with output gear 37
The mode of overlapping configures.Thereby, it is possible to keep the maximum outside diameter of outer ring 13 smaller than the outer diameter of output gear 37.
In addition, being looked up from the axes O side of hub spindle bearing portion 11, since the second bolt 15 is configured than output gear 37
Therefore the more outward position of diameter side can dividually configure multiple second bolts 15 in a circumferential direction.In addition, the second bolt
For the through hole 39h of 15 perforations to outside diameter far from output gear 37, thereby, it is possible to make the wall thickness part of through hole 39h formation
39g is thicker than other housing parts of main body shell 39, locally increases the rigidity of main body shell 39.Thus, it is supposed that even if axis
Re-transmission is handed to the second bolt 15, can also prevent the deformation of main body shell 39.
In addition, the inner peripheral surface 61n of hub attachment 61 is chimeric with the cylindrical portion 39c of main body shell 39, it is defeated with reduction part 31
Shaft 38 is coaxially positioned, and as a result, in the assembly working of in-wheel motor drive unit 10, hub attachment 61 is relative to main body
Shell 39 positions naturally, improves the efficiency of assembling and the precision of assembling.
In addition, the outer peripheral surface 13b of outer ring 13 is chimeric with the opening 39p of main body shell 39, the output shaft 38 with reduction part 31
Be coaxially positioned, as a result, in the assembly working of in-wheel motor drive unit 10, outer ring 13 relative to main body shell 39 naturally
Positioning, improves the efficiency of assembling and the precision of assembling.
More than, embodiments of the present invention are illustrated referring to attached drawing, but the invention is not limited to shown in attached drawing
Embodiment.For embodiment shown in the drawings, with same range or equivalency range of the invention in, can add each
Kind modification or deformation.
Industrial availability
In-wheel motor drive unit of the invention can be effectively utilized in electric car or hybrid vehicle.
Claims (8)
1. a kind of in-wheel motor drive unit comprising:
Hub spindle bearing portion, with inner ring, outer ring, configuration the annular gap of the inner ring and the outer ring multiple rollings
Body, the hub spindle bearing portion are configured in the inner space area for being fixed on the wheel rim of the inner ring；
Motor part drives the inner ring；And
Hub attachment more path and is accommodated in the inner space area than the wheel rim, and the hub attachment passes through the
One bolt is fixed in the outer ring, and the shell for accommodating the motor rotation axis of the motor part is fixed in by the second bolt
Body.
2. in-wheel motor drive unit according to claim 1, wherein
Centered on the axis of the hub spindle bearing portion, the second bolt configuration is in diameter side more outward than first bolt
Position.
3. in-wheel motor drive unit according to claim 2, wherein
The in-wheel motor drive unit further includes reduction part, and the reduction part, which has, is connected to the motor rotation axis
Input shaft, the output shaft for being connected to the inner ring and the output gear in conjunction with the output shaft, the reduction part will be described
The rotation of input shaft slows down and is transferred to the output shaft,
From on the axis direction of the hub spindle bearing portion, first bolt is matched in a manner of Chong Die with the output gear
It sets.
4. in-wheel motor drive unit according to claim 3, wherein
From on the axis direction of the hub spindle bearing portion, the second bolt configuration is in diameter more outward than the output gear
The position of side.
5. in-wheel motor drive unit according to claim 3 or 4, wherein
Chimeric with the shell and output shaft with the reduction part of the hub attachment is coaxially positioned.
6. in-wheel motor drive unit according to claim 3 or 4, wherein
Chimeric with the shell and output shaft with the reduction part in the outer ring is coaxially positioned.
7. in-wheel motor drive unit according to any one of claims 1 to 4, wherein
The in-wheel motor drive unit further includes brake disc, and the brake disc has drag friction face, institute in outer diameter zone
The inner diameter zone for stating brake disc is fixed in the inner ring,
At least part configuration in first bolt and second bolt is more leaning on internal side diameter than the drag friction face
Position.
8. in-wheel motor drive unit according to claim 7, wherein
The inner diameter zone is configured in the position for more leaning on axis direction side than the outer diameter zone,
The brake disc also has the circular step for connecting the inner diameter zone and the outer diameter zone,
The circular step and the inner diameter zone constitute the cap portion of the inner space area of zoning cylindrical shape,
At least part in first bolt and second bolt configures in the inner space area of the cap portion
Domain.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018023067 | 2018-02-13 | ||
| JP2018-023067 | 2018-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110154744A true CN110154744A (en) | 2019-08-23 |
Family
ID=67644831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810346465.0A Pending CN110154744A (en) | 2018-02-13 | 2018-04-17 | In-wheel motor drive unit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7270403B2 (en) |
| CN (1) | CN110154744A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160214474A1 (en) * | 2013-09-13 | 2016-07-28 | Ntn Corporation | In-wheel motor drive device |
| WO2017002603A1 (en) * | 2015-07-02 | 2017-01-05 | Ntn株式会社 | In-wheel motor drive device |
| JP2017185908A (en) * | 2016-04-06 | 2017-10-12 | Ntn株式会社 | Power line protection structure |
| JP2017214014A (en) * | 2016-06-01 | 2017-12-07 | Ntn株式会社 | In-wheel motor drive device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101441813B1 (en) | 2013-06-25 | 2014-09-18 | 현대위아 주식회사 | Device for driving rear wheel of electric vehicle |
-
2018
- 2018-04-17 CN CN201810346465.0A patent/CN110154744A/en active Pending
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2019
- 2019-02-12 JP JP2019022539A patent/JP7270403B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160214474A1 (en) * | 2013-09-13 | 2016-07-28 | Ntn Corporation | In-wheel motor drive device |
| WO2017002603A1 (en) * | 2015-07-02 | 2017-01-05 | Ntn株式会社 | In-wheel motor drive device |
| JP2017185908A (en) * | 2016-04-06 | 2017-10-12 | Ntn株式会社 | Power line protection structure |
| JP2017214014A (en) * | 2016-06-01 | 2017-12-07 | Ntn株式会社 | In-wheel motor drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7270403B2 (en) | 2023-05-10 |
| JP2019137395A (en) | 2019-08-22 |
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