CN108621780A - In-wheel motor drive unit - Google Patents
In-wheel motor drive unit Download PDFInfo
- Publication number
- CN108621780A CN108621780A CN201810070965.6A CN201810070965A CN108621780A CN 108621780 A CN108621780 A CN 108621780A CN 201810070965 A CN201810070965 A CN 201810070965A CN 108621780 A CN108621780 A CN 108621780A
- Authority
- CN
- China
- Prior art keywords
- outer ring
- accessory members
- axis direction
- drive unit
- motor drive
- 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.)
- Withdrawn
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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
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
- B60G15/062—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper
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- 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
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
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- 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
- B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Rolling Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The present invention provides a kind of technology for the axis direction size reducing in-wheel motor drive unit.In the hub spindle bearing portion (11) of in-wheel motor drive unit,Outer ring (13) includes outer ring barrel member (13b),Outer ring Accessory Members (13c),Outer ring Accessory Members supporting part (13f,13h),Wherein,The outer ring barrel member (13b) has the outer side track face (13m of rolling element (14) rolling,13n),Through hole of the outer ring Accessory Members (13c) with storage outer ring barrel member is simultaneously chimeric with the peripheral surface of outer ring barrel member with defined axis direction size (Ls),The outer ring Accessory Members supporting part (13f,It 13h) is arranged on outer ring Accessory Members and is used for and shell (38b) and vehicle-body-side component (102) the two or in which any one combination,Inner ring (12) is including inner ring supporting part (12c) from outer ring one side end of axis direction outstanding,Outer side track face and rolling element (14m,14n) it is configured with multiple row spaced apartly on the direction axis (O).
Description
Technical field
The present invention relates to a kind of hub bearing of in-wheel motor drive unit (hub bearing)..
Background technology
In-wheel motor drive unit is configured in the inner space area of wheel, drives the wheel, is filled via suspension
Set connection vehicle body.As the technology that in-wheel motor drive unit is connected to draft hitch, it is known to which for example Japanese invention is special
Perhaps the technology that No. 5565388 bulletin (patent document 1) is disclosed.Patent document 1 the 0062nd, 0063 paragraph disclose suspension dress
It sets, as shown in figure 9, draft hitch has the crossbeam extended to the vehicle width direction of vehicle, prolongs from the end of crossbeam to vehicle front side
The towing arm stretched, from the end of crossbeam to vehicle width direction on the outside of and obliquely extend to vehicle rear-side hub arm, be fixed on
The joint portion of the plate of the front end of hub arm.
Shown in the Fig. 9 of the in-wheel motor drive unit of patent document 1 as disclosed in the 0076th paragraph, draft hitch is fixed
At the joint portion.For easy understanding, Fig. 8 of this case generally indicates the structure at the joint portion, that is, in-wheel motor drives
The hub bearing 211 of dynamic device 200 has inner ring 212, outer ring 213 and ball 214.The inner ring 212 of hub bearing 211 has
The inner ring of the cylindrical portions 212b extended to vehicle width direction and the vehicle width direction outboard end for being integrally formed in cylindrical portions 212b is convex
Edge 212c.The cylindrical portions 212b of inner ring 212 passes through the centre bore of outer ring 213.Inner ring flange 212c is with than 213 major diameter of outer ring
Mode is formed.
In addition the outer ring 213 of hub bearing 211 has cylindrical portions 213b and is protruded from the peripheral surface of cylindrical portions 213b
Outer ring flange 213c.The outer ring flange 213c more leaves vehicle width in a manner of retention bolt space S, than inner ring flange 212c
Direction medially configures.The configuration of joint portion 220 of draft hitch than outer ring flange 213c closer to the position on the inside of vehicle width direction
It sets, the two and the axis direction of hub bearing 211 abut.Bolt 221 and the axis of hub bearing 211 extend parallel to, from spiral shell
Bolt space S is inserted into the through hole of outer ring flange 213c, penetrates through and fastens the outer ring flange 213c and joint portion 220.
Existing technical literature
Patent document
Patent document 1：No. 5565388 bulletins of Japanese Patent Publication No.
But the inventors found that there is the point for needing further to improve in patent document 1.That is, in order to
It is inserted into and outer ring flange 213c is connected to the bolt 221 at joint portion 220 of draft hitch it is necessary to have longer than bolt 221
Bolt space S, cylindrical portions 213b are prominent from outer ring flange 213c to axis direction outside.Therefore, in-wheel motor driving dress
200 axis direction is set to become large-sized.Including the in-wheel motor drive unit 200 of hub bearing 211 is preferably small-sized, because
This, still there is the leeway for improving axis direction size in patent document 1.
Invention content
In view of the above facts, the purpose of the present invention is to provide a kind of axis directions reducing in-wheel motor drive unit
The technology of size.
(means for solving technical problem)
To achieve the goals above, in-wheel motor drive unit of the invention includes：Hub spindle bearing portion has outer
Circle, inner ring and multiple rolling elements, wherein the inner ring passes through the centre bore of outer ring and from outer ring to one pleurapophysis of axis direction
Go out, the multiple rolling element is configured in the annulus between outer ring and inner ring；Motor part drives inner ring；And shell
Body covers the driving transmission path up to inner ring from motor part.Outer ring in above-mentioned component includes outer ring barrel member, outer ring
Accessory Members and outer ring Accessory Members supporting part, wherein the outer ring barrel member has the outer side track for rolling element rolling
Face, the outer ring Accessory Members have the through hole of storage outer ring barrel member and with defined axis direction sizes and outer ring cylinder structure
The peripheral surface of part is chimeric, and the outer ring Accessory Members supporting part is arranged on outer ring Accessory Members and is used for and shell and body side
Both components or in which any one combination.In addition, inner ring is used for and vehicle having from outer ring axis direction one end outstanding
Take turns the inner ring supporting part combined.On the axis direction of the hub spindle bearing portion, the motor part is configured in the wheel hub
The axis direction other side of bearing portion, the outer side track face have multiple row and in the axial direction spaced apart configure.
The rolling element is spaced apart in the axial direction in a manner of each row rolling of orbital plane on the outside to be configured with multiple row.
According to the present invention, the component that the outer ring of hub spindle bearing portion is not integrally formed, but include outer ring barrel member
With this 2 components of outer ring Accessory Members.Moreover, outer ring Accessory Members are mounted on outer ring cylinder structure by the chimeric of indentation etc.
The periphery of part.Therefore, without the bolt used as described in patent document 1, bolt space problem in the prior art can be released.
In addition, in accordance with the invention it is possible to freely manufacture the shape of outer ring Accessory Members, the configuration of outer ring Accessory Members supporting part is free
Degree becomes larger, and can reduce the axis direction size of in-wheel motor drive unit according to the configuration.In addition, outer ring barrel member and outer
Enclosing the chimeric of Accessory Members refers to：The internal diameter of the through hole of storage outer ring barrel member is set to be formed relatively smallly, outer ring barrel member
Outer diameter relatively largely formed, the difference of the size of the internal-and external diameter becomes diametric interference volume, to outer ring barrel member
The through hole that peripheral surface is close to outer ring Accessory Members is fixed.In addition, outer ring Accessory Members pass through outer ring Accessory Members supporting part
Vehicle-body-side component is connected, the shell of in-wheel motor drive unit is used for thereby, it is possible to avoid wheel recast.In addition, can be from vehicle
The connection that outer ring Accessory Members supporting part and shell are released on the outside of wide direction, by hub spindle bearing portion from shell to vehicle width direction on the outside of
The maintenance replacement of separation, the inspection and hub spindle bearing portion 11 that make in-wheel motor drive unit becomes simple.
As the preferred embodiment of the present invention, when the axis direction using axis direction center as hub spindle bearing portion
When center, outer ring Accessory Members are configured in the position that axis direction side is more biased towards than the axis direction center
Set, wherein the axis direction center is in the outer side track face comprising the inner peripheral surface that is arranged on outer ring barrel member, from
Closest to axis direction side outer side track face until closest to the axis direction other side outer side track face region axis
Line direction center.According to the embodiment, since outer ring barrel member is from outer ring Accessory Members to one pleurapophysis of axis direction
The length gone out becomes smaller, therefore, it is possible to make the axis direction size ratio prior art smaller of in-wheel motor drive unit.As institute
The chimeric surface of outer ring Accessory Members and outer ring barrel member is more biased towards axis by an example for stating embodiment than axis direction center
Configure to line direction side.As other examples of the embodiment, by outer ring Accessory Members supporting part than axis direction center
Position configures with being more biased towards axis direction side.
Any one of the outer ring of hub spindle bearing portion, inner ring, rolling element are all by meeting prescribed strength and including regulation model
The steel for the carbon content enclosed is formed.On the other hand, shell and vehicle-body-side component are preferably formed by light metal.Vehicle-body-side component from
It refer to the component for being installed in body side from the point of view of on its letter.Specifically, dress is driven from the in-wheel motor of the present invention
From the point of view of setting, vehicle-body-side component refers to the suspension member of draft hitch or assists the company of draft hitch and in-wheel motor drive unit
The suspension bracket connect.The inner ring of hub spindle bearing portion can also have centre bore, or can also be solid axis.From motor part
Driving transmission path to inner ring can also include deceleration mechanism.3 be made of vehicle-body-side component, outer ring Accessory Members, shell
The marriage relation of component is as described below, that is, arbitrary 2 component in 3 components is bonded directly to one another, the remaining component in 3 components
It is bound directly with above-mentioned any one of 2 components.2 components are tied ground and are combined to each other as a result,.
As an example, outer ring Accessory Members bind directly the vehicle bodies such as suspension member by one group of outer ring Accessory Members supporting part
Side member, and shell is bound directly by another group of outer ring Accessory Members supporting part.Vehicle-body-side component and shell be indirectly as a result,
In conjunction with.As other examples, shell is bound directly and direct by one group of outer ring Accessory Members supporting part with vehicle-body-side component
In conjunction with outer ring Accessory Members, but outer ring Accessory Members do not bind directly with vehicle-body-side component and are only in close contact.In turn, as
Other examples, vehicle-body-side component is bound directly with shell and to bind directly outer ring by one group of outer ring Accessory Members supporting part attached
Metal elements, but shell does not bind directly with outer ring Accessory Members and only engages.
As one embodiment of the present invention, in outer ring, axis direction one end of barrel member is formed with prominent to outer diameter side
Protrusion, in outer ring, the peripheral surface of the axis direction other side of barrel member is attached to limiting member, and outer ring Accessory Members are between protrusion
Between limiting member.According to the embodiment, outer ring Accessory Members and the relative movement of outer ring barrel member are restricted.It is right
Limiting member is not particularly limited, for example, snap ring.
As the preferred embodiment of the present invention, the outer ring Accessory Members supporting part of outer ring Accessory Members is arranged on than interior
Supporting part is enclosed closer to the position of outside diameter.According to the embodiment, the nothing between inner ring supporting part and outer ring Accessory Members
It must ensure the bolt space for storing bolt screwed togather to outer ring Accessory Members supporting part etc..Therefore, it is possible to which inner ring is supported
Portion is arranged to reduce from outer ring to the protrusion of axis direction side inner ring outstanding closer to outer ring Accessory Members than the prior art
Length provides the in-wheel motor drive unit than the prior art smallerization.
As further preferred embodiment of the present invention, shell includes to be open described in the opening and zoning of storage outer ring
A part for annular section, annular section is combined with outer ring Accessory Members supporting part, is provided in the other parts of annular section
Connection supporting part for connecting vehicle-body-side component.According to the embodiment, wheel will act on the annular section of shell again, and
The other parts in shell will not be acted on.Therefore, the stiffeners such as rib are set without in shell, are conducive to in-wheel motor
The lightweight of driving device.
The shape of outer ring Accessory Members is not particularly limited, as one embodiment of the present invention, the attached structure in outer ring
Part includes prominent to the axis direction other side and chimeric capsid cylindrical portion.It, can be reliable by shell according to the embodiment
Ground is mounted on outer ring.It is preferred that sealing material is arranged between cylindrical portion and shell.The leakproofness of shell is improved as a result,.
The configuration of cylindrical portion is not particularly limited, as one embodiment of the present invention, cylindrical portion is attached along outer ring
The inner peripheral surface of metal elements configures, and the inner peripheral surface of cylindrical portion is contained in the axis of the chimeric surface of outer ring barrel member and outer ring Accessory Members
Line direction size and chimeric with outer ring barrel member.According to the embodiment, outer ring barrel member and outer ring Accessory Members it is chimeric
Face broadens, and thereby, it is possible to reliably install fixed outer ring Accessory Members to outer ring barrel member.As other embodiment, outer ring
Accessory Members can also be the plectane without cylindrical portion.
(invention effect)
As described above, according to the present invention, the configuration freedom of outer ring Accessory Members supporting part becomes larger, and can release existing skill
The bolt space problem of art makes the axis direction size ratio prior art smaller of in-wheel motor drive unit.In addition, can keep away
Exempt to take turns the shell that recast is used for in-wheel motor drive unit.In addition, can by hub spindle bearing portion from shell to outside vehicle width direction
Side detaches, and the inspection of in-wheel motor drive unit and repairing is made to become simple.
Description of the drawings
Fig. 1 is the schematic diagram for the in-wheel motor drive unit for indicating the first embodiment of the present invention, is indicated from vehicle width
The state observed on the outside of direction.
Fig. 2 is the expansion sectional view for the in-wheel motor drive unit for indicating same embodiment.
Fig. 3 is the longitudinal sectional view for the hub spindle bearing portion that amplification indicates same embodiment.
Fig. 4 is the stereogram for taking out the outer ring Accessory Members for indicating same embodiment.
Fig. 5 is the stereogram for taking out the outer ring Accessory Members for indicating same embodiment.
Fig. 6 is the expansion sectional view for the in-wheel motor drive unit for indicating second embodiment of the present invention.
Fig. 7 is the expansion sectional view for the in-wheel motor drive unit for indicating third embodiment of the present invention.
Fig. 8 is the longitudinal sectional view for indicating existing in-wheel motor drive unit.
Reference sign：
10, in-wheel motor drive unit
11, hub spindle bearing portion
12, inner ring
12b, inner ring canister portion
12c, inner ring flange
12r, inner track circle
13, outer ring
13b, outer ring barrel member
13c, outer ring Accessory Members
13d, protrusion
13e, cylindrical portion
13f, internal thread hole (in conjunction with supporting part)
13r, snap ring (limiting member)
13h, through hole (in conjunction with supporting part)
13s, through hole
13m, 13n, outer side track face
14,14m, 14n, rolling element
15,17,19, bolt
21, motor part
31, reduction part
32, enter powershift gear
32s, input shaft
36, go out powershift gear
37, output shaft
38, main body shell
38a, bearing surface
38b, back portion
38c, annular section
38f, front portion
38h, opening
55, brake disc
70, draft hitch
71, underarm
71a, vehicle width direction outboard end
73, pillar
74, damper
75, lower helical spring seat
80, pull rod
82, power line
102, suspension bracket
102a, central portion
102b, upside suspension bracket
102c, opening
102d, downside suspension bracket
CL, axis direction center
Lb, bearing region
The axis direction size of Ls, chimeric surface
M, N, O, axis
S, bolt space
W, wheel rim.
Specific implementation mode
The embodiment that the present invention will be described in detail referring to the drawings.Fig. 1 is the first embodiment for indicating the present invention
The schematic diagram of in-wheel motor drive unit, the state from indicating on the outside of vehicle width direction.In Fig. 1, to make on the upside of paper
For vehicle up direction, using paper on the downside of be used as under-vehicle, using paper on the left of as vehicle front, using paper right side as vehicle after
Side.Vehicle front refers to the direction of advance of vehicle.Rear of vehicle refers to the direction of retreat of vehicle.Fig. 2 is to indicate same embodiment party
The expansion sectional view of the in-wheel motor drive unit of formula.The cutting plane indicated in fig. 2 be will include axis M shown in FIG. 1
The expansion plane being linked in sequence with the plane of axis N and the plane comprising axis N and axes O.In fig. 2, with paper
Left side is as vehicle width direction outside, using paper right side as vehicle width direction inside.It in the following description, also will be outside vehicle width direction
Side (external disk side) is known as axis direction side, and (inner disc side) on the inside of vehicle width direction is known as the axis direction other side.First implements
The in-wheel motor drive unit 10 of mode is configured in the inner space area of wheel rim W shown in Fig. 2, together with wheel rim W by
It is housed in the car wheel cover of vehicle body (not shown).
The inner space area of the drop center portion Wr and disc portion Ws zoning wheels of wheel rim W.It is chimeric in the periphery of drop center portion Wr
There is tire (not shown).Wheel rim W and tire constitute wheel.Wheel rim W and in-wheel motor drive unit 10 are symmetrically matched
It sets in the vehicle width direction both sides of vehicle body (not shown), constitutes electric vehicle.In-wheel motor drive unit 10 can make electric vehicle
It is travelled with the speed of 0~180km/h of speed per hour.
In-wheel motor drive unit 10 is installed in vehicle body (not shown) via draft hitch 70.Draft hitch 70 is to subtract
Candle suspension device is shaken, it includes the underarm 71 extended to vehicle width direction, configurations in the position than 71 more top of underarm and upward
The pillar 73 that lower direction extends.Pillar 73 is disposed on the axes O more top than in-wheel motor drive unit 10 and than wheel rim W
Suspension member on the inside of closer to vehicle width direction.In addition, the vehicle width direction position of pillar 73 and in-wheel motor drive unit 10
Vehicle width direction inboard portion overlapping.
The lower end area of pillar 73 is combined with suspension bracket 102, its related detailed content will be described later.Only table in Fig. 1
Show the lower end area of pillar 73, omits the upper area of pillar 73.The upper area is in the position connection than wheel rim W more top
Vehicle body.
The outer barrel of the lower end area of pillar 73 specifically damper 74.The axis (not shown) of damper 74 is from outer barrel
Upper end extends as the crow flies upward.The peripheral surface of damper 74 is provided with the lower helical spring seat 75 of edge shape.Lower spiral bullet
Spring abutment 75 supports the lower end of the helical spring (not shown) coaxially configured in a manner of surrounding damper 74.Helical spring and subtract
It shakes device 74 and constitutes attenuator.Therefore, pillar 73 can vertically stretch, and the axial power for acting on pillar 73 is made to decline
Subtract.
Underarm 71 is disposed on the axes O suspension member further below than in-wheel motor drive unit 10, and it includes vehicles
Wide direction outboard end 71a (Fig. 1) and vehicle width direction inner end (not shown).Underarm 71 hold on the outside of overall width direction on 71a via
Ball-and-socket joint (not shown) connects suspension bracket 102.Underarm 71 connects vehicle body (not shown) on inner end in the direction of vehicle width.With vehicle
Wide direction inner end is as cardinal extremity, and using vehicle width direction outboard end 71a as free end, underarm 71 can vertically be swung.Even
The straight line for picking up the upper end of wide direction outboard end 71a and pillar 73 vertically extends and constitutes steer axis K.Steer axis
K vertically extends substantially, but can also be slightly inclined to vehicle width direction and/or vehicle front-rear direction.
Suspension bracket 102 is the component for being attached to in-wheel motor drive unit 10 shown in FIG. 1.Suspension bracket 102 is
One component, it includes upside suspension bracket 102b, central portion 102a, downside suspension bracket 102d.Central portion 102a is (in Fig. 2
Symbol 102) outer ring 13 is installed in a manner of as be described hereinafter.Central portion 102a has opening 102c.Be open 102c storage wheels
The outer ring 13 of built-in motor driving device 10, central portion 102a are fastened by bolt 15 and outer ring 13.12 pass through openings of inner ring
102c.Upside suspension bracket 102b is protruded upward from central portion 102a, and (axis is only being indicated in Fig. 1 than motor part 21
M) position of more top extends inwardly on the outside of vehicle width direction, and the front end of inside is combined with damper 74 in the direction of vehicle width.
Downside suspension bracket 102d is protruded downwards from central portion 102a, and underarm 71 is connected in front end.
Shown in dotted line, it is configured with pull rod 80 in the position than 71 more top of underarm.Pull rod 80 extends to vehicle width direction, draws
The vehicle width direction outboard end of bar 80 is rotatably coupled suspension bracket 102.The vehicle width direction inner end connection of pull rod 80 is not shown
Transfer.Transfer makes pull rod 80 move forward and backward to vehicle width direction, makes in-wheel motor drive unit 10 and wheel rim W
It is turned to around steer axis K.Run through and be fixed with in-wheel motor drive unit 10 in the opening 102c of suspension bracket 102, has
It is closed to will be described later in detail.
In-wheel motor drive unit 10 includes the hub spindle bearing portion 11 at the center of connection wheel rim W shown in Fig. 2, driving vehicle
The motor part 21 of the wheel rim W of wheel by the rotational deceleration of motor part and passes to the reduction part 31 of hub spindle bearing portion 11.It is electronic
Machine portion 21 and reduction part 31 are configured in the position for the axes O for deviateing hub spindle bearing portion 11, rather than with hub spindle bearing portion 11
Axes O coaxially configures.Axes O extends to vehicle width direction, consistent with axle.Relatively with axes O direction position, hub bearing
Portion 11 is configured in the axis direction side (external disk side) of in-wheel motor drive unit 10, and motor part 21 is configured in wheel
The axis direction other side (inner disc side) of motor drive 10, reduction part 31 is configured in in-wheel motor drive unit 10
Axis direction central portion.Hub spindle bearing portion 11 and reduction part 31 are accommodated in the area drop center portion Wr and disc portion Ws by wheel rim W
The inside wheel area of space drawn.Motor part 21 is protruded from inside wheel area of space to the axis direction other side.
Hub spindle bearing portion 11 has in conjunction with wheel rim W and the inner ring 12 as rotation circle, the outer ring 13 as retainer plate, configuration
Multiple rolling elements 14 of annular gap between inner ring 12 and outer ring 13 rotatably freely support inner ring 12.Inner ring 12 with
The axes O of axle as the center by hub spindle bearing portion 11 is consistent.In addition, the case where especially needing to distinguish rolling element 14
Under, alternatively referred to as rolling element 14m, 14n.
Fig. 3 is the amplification longitudinal sectional view for taking out and indicating the hub spindle bearing portion in Fig. 2.Fig. 4 and Fig. 5 is from hub bearing
The stereogram that portion takes out outer ring Accessory Members and is indicated, Fig. 4 indicate that axes O direction side, Fig. 5 indicate that axes O direction is another
Side.Outer ring 13 includes outer ring barrel member 13b and outer ring Accessory Members 13c.Outer ring barrel member 13b and outer ring Accessory Members 13c
It is component independently.Outer ring Accessory Members 13c has through hole 13s and be the plank being formed from steel in central portion, to passing through
Through-hole 13s is inserted into the outer ring barrel member 13b being formed from steel.The outer diameter of outer ring barrel member 13b is bigger than the internal diameter of through hole 13s, leads to
The size (diametric interference volume) of the internal-and external diameter difference is crossed, outer ring barrel member 13b is on defined entire axes O direction
Size Ls on be pressed into fixed to outer ring Accessory Members 13c.Accessory Members 13c in outer ring works as outer ring flange as a result,.
In outer ring, the central portion of Accessory Members 13c is formed with the inner circumferential along through hole 13s towards axes O direction other side circle outstanding
The cylindrical portion 13e of cylinder.Including cylindrical portion 13e, the inner peripheral surface of outer ring Accessory Members 13c is chimeric with outer ring barrel member 13b.
Inner ring 12 and outer ring barrel member 13b are by the height that is for example selected from the excellent bearing steel SUJ1~SUJ5 of wear resistance
The steel alloy of the carbon steel or mechanical realization of carbon chromium bearing steel or the mechanical realization selected from the SooC of S53C etc.
It constitutes.Outer ring Accessory Members 13c from the carbon steel or mechanical realization of the SooC of S53C etc. the mechanical realizations selected by for example using
Steel alloy constitute.
The axes O direction size Ls of chimeric surface is interference fit, rather than clearance fit or intermediate tie.That is,
The internal diameter of through hole 13s is more slightly smaller than the outer diameter of outer ring barrel member 13b.In addition, at the axes O direction size Ls of chimeric surface, pass through
The internal diameter of through-hole 13s and the outer diameter of outer ring barrel member 13b are respectively formed with fixed.The axes O direction size Ls packets of chimeric surface
The main body of the 13c of Accessory Members containing outer ring and it is provided projectingly the cylindrical portion 13e in the main body.That is, the axes O side of chimeric surface
It is equal to the axes O direction size of outer ring Accessory Members 13c to size.
Cylindrical portion 13e, which is inserted into and is fitted into peripheral surface, is formed in the opening 38h of aftermentioned front portion 38f.In opening 38h
Inner peripheral surface and the peripheral surface of cylindrical portion 13e between have cricoid sealing material 38d.Sealing material 38d is such as O-ring,
Configure the circumferential groove in the peripheral surface for being formed in cylindrical portion 13e.By sealing material 38d, outer ring 13 seamlessly connects main body
Shell 38.
In outer ring, one side of axes O direction of barrel member 13b is formed with the raised 13d prominent to outer diameter side.Protrusion 13d limits
Relative movements of the Accessory Members 13c in outer ring processed to axes O direction side.In addition, between protrusion 13d can be spaced apart in a circumferential direction
It configures, or can also to circumferentially continuous extend every ground, can also be the flange that lasting whole circumference extends.
In outer ring, the peripheral surface of barrel member 13b forms the circumferential groove that oriented circumferencial direction extends, and being fitted into circumferential groove has C words
The snap ring 13r of shape.Have outer ring attached between the protrusion 13d and the snap ring 13r of the axes O direction other side of axes O direction side
Metal elements 13c.In turn, protrusion 13d abuts the end face of outer ring Accessory Members 13c, and snap ring 13r abuts the front end of cylindrical portion 13e,
Limit relative movements of the outer ring Accessory Members 13c to the axes O direction other side.That is, outer ring Accessory Members 13c is by protrusion
The both sides of 13d and snap ring 13r fold, and are prohibited to the movement in axes O direction.
As outer ring flange outer ring Accessory Members 13c, spaced apart in a circumferential direction be equipped with multiple interior spiral shells
Pit 13f and through hole 13h.For example, internal thread hole 13f and through hole 13h are in a circumferential direction at a prescribed interval alternately
Setting.Each internal thread hole 13f and each through hole 13h are extended parallel to axes O, from axes O direction side respectively by bolt 15,
17 pass through.The axle portion of each bolt 15 passes through the through hole 102h of suspension bracket 102, is screwed together in internal thread hole 13f.Each bolt 15
Head is prominent from suspension bracket 102 to axes O direction side.In addition, the outer rim in outer ring Accessory Members 13c is formed with storage simultaneously
Engage notch 13g, 13j of the regulation shape of suspension bracket 102.Notch 13g is formed in the axis direction of outer ring Accessory Members 13c
One side end face.Internal thread hole 13f is formed in the inside of notch 13g and is directed toward axes O direction side.Outer ring 13 is mounted as a result,
It is fixed on suspension bracket 102.Internal thread hole 13f is bottomless through hole shown in Fig. 3, but as variation, can also be not
The hole with the end of diagram.For easy understanding, the part for only indicating suspension bracket 102 in fig. 2, omits remaining part.
The front portion 38f of main body shell 38 is contacted with another side end face face in the axes O direction of outer ring Accessory Members 13c.
Through hole 13h is formed in the inside of notch 13j and extends to axes O direction, and the notch 13j is formed in outer ring Accessory Members
The outer rim of 13c.The axle portion of each bolt 17 is screwed together in internal thread hole 38g across through hole 13h, and the internal thread hole 38g is worn
In front portion 38f.Thus outer ring 13 is mounted on main body shell 38.The head of each bolt 17 is located at the interior of notch 13j
Portion.In addition, main body shell 38 is supported in suspension bracket 102 via outer ring 13.
In addition, front portion 38f is the housing wall portion of the one end in the axes O direction for covering reduction part 31.Suspension bracket 102
It is non-rotating component in the same manner as outer ring 13 and main body shell 38.On the other hand, inner ring 12 is the rotation rotated integrally with wheel rim W
Turn component.
Notch 13j, through hole 13h, the axes O direction of the outer ring Accessory Members 13c contacted with the front portion faces 38f are another
Side end face, the flat bolt bearing face contacted with 17 head surface of bolt on the surfaces Accessory Members 13c of outer ring formed for
The outer ring Accessory Members supporting part combined as the front portion 38f of shell.
It is tight in the axial direction with suspension bracket 102 in notch 13g, internal thread hole 13f, the outer ring surfaces Accessory Members 13c
The tactile flat surface of contiguity is the outer ring Accessory Members supporting part for being combined with the suspension bracket 102 as vehicle-body-side component.Vehicle
Body side member refers to the component mounted on body side from the point of view of the component of the explanation, from the point of view of outer ring 13 comprising suspension support
Frame 102, draft hitch, vehicle body etc..
Inner ring 12 includes inner ring canister portion 12b and inner ring flange 12c.Inner ring canister portion 12b is the cylinder longer than outer ring 13,
Across the centre bore of outer ring barrel member 13b.From outer ring 13 to the outside of in-wheel motor drive unit 10 inner ring cylinder outstanding
One side end of axes O direction of portion 12b is formed with inner ring flange 12c.Inner ring flange 12c is not round, in circumferencial direction
On at a prescribed interval incision have notch.Inner ring 12 is combined on inner ring flange 12c with wheel rim W, is rotated integrally with wheel.Inner ring
Flange 12c constitutes the wheel support portion for coaxially being combined with brake disc 55 and wheel (wheel rim W).
Inner ring canister portion 12b is protruded from inner ring flange 12c to the axes O direction other side in the axes O direction of inner ring canister portion 12b
Another region peripheral surface and outer ring barrel member 13b between annulus be configured with multiple row rolling element 14m, 14n.Inner ring cylinder
The peripheral surface of the axes O direction central portion of portion 12b constitutes the inner track face of the rolling element 14m of first row.In inner ring canister portion 12b
The peripheral surface of end side in axes O direction chimeric have inner track circle 12r.The peripheral surface of inner track circle 12r is constituted
The inner track face of the rolling element 14n of secondary series.Annulus between inner ring canister portion 12b and outer ring barrel member 13b also has
There is sealing material 16.The both ends in 16 sealing ring space of sealing material prevent the intrusion of dust and foreign matter.To inner ring canister portion 12b
Axes O direction the other end centre bore be inserted into reduction part 31 output shaft 37 and carry out spline fitted.
Here, additionally it is configured in the rolling of the first row closest to axes O direction side (on the outside of vehicle width direction)
The body 14m and rolling element 14n for being configured in the secondary series closest to the axes O direction other side (on the inside of vehicle width direction).Outer ring cylinder
The axes O direction end side of component 13b is protruded from outer ring Accessory Members 13c to the axes O direction other side.The outer ring cylinder
Inner peripheral surface in the axes O direction end side of component 13b constitutes the outer side track face 13n of the rolling element 14n of secondary series.
That is the axes O direction position of the rolling element 14n of secondary series is not heavy with the axes O direction position of outer ring Accessory Members 13c
It is folded.On the other hand, the axes O direction position of the axes O direction position of the rolling element 14m of first row and outer ring Accessory Members 13c
Set overlapping.
It, will be comprising from closest to the outer of axes O direction side in multiple outer side track faces of rolling element 14 with reference to Fig. 3
Region between siding track face 13m to the outer side track face 13n closest to the axes O direction other side is referred to as hub spindle bearing portion 11
Bearing region Lb.In addition, the axes O direction center of bearing region Lb to be referred to as to the axis direction center of hub spindle bearing portion 11
Position CL.The axes O direction size Ls of the chimeric surface of present embodiment is more biased towards axis direction than axis direction center CL
Configure to side (on the outside of vehicle width direction).In other words, compare the axis direction center CL of bearing region Lb, the axis of chimeric surface
The axis direction center CS of the directions line O size Ls is closer to inner ring flange 12c.
As shown in Fig. 2, motor part 21 has motor rotation axis 22, rotor 23, stator 24, motor field frame 25, and
It is sequentially configured in order from the axis M of motor part 21 to outside diameter with this.Motor part 21 be internal rotor, external stator form diameter
To gap motor, but may be other forms.For example, motor part 21 (not shown) or axial gap motor.
As the axes O of motor rotation axis 22 and the axis M and hub spindle bearing portion 11 of the rotation center of motor 23
It extends parallel to.That is, motor part 21 deviates configuration in a manner of being left from the axes O of hub spindle bearing portion 11.Specifically
For, as shown in Figure 1, the axis M of motor part is configured at leans on vehicle front than axes O.It is connected on the top of motor part 21
It is fixed with the one end from the external power line 82 extended of in-wheel motor drive unit 10.Motor 21 is three-phase alternating current
Motivation is configured with three power lines 82 in the present embodiment.But the radical of the model of motor part 21 and power line 82
It is without being limited thereto.
Motor field frame 25 is substantially cylindrical shape, as shown in Fig. 2, one end in the directions axis M and main body shell 38
Back portion 38b is combined into one, in the motor field frame outer cover 25v sealings that another side in the directions axis M passes through plate.Electricity
The both ends of motivation rotary shaft 22 are rotatably freely supported on the back portion 38b of main body shell 38 via rolling bearing 27,28
With the motor field frame outer cover 25v of motor part 21.Main body shell 38, motor field frame 25, motor field frame outer cover 25v are constituted
The shell of in-wheel motor drive unit 10.Motor part 21 drives inner ring 12.
Reduction part 31 is three axis parallel-axes gears speed reducers, has input shaft 32s, input gear 32, multiple intermediate gears
33,35, jackshaft 34, output shaft 37, output gear 36, main body shell 38, wherein the input shaft 32s and motor part 21
Motor rotation axis 22 coaxially combine, the input gear 32 is placed coaxially on the peripheral surface of input shaft 32s, in described
Countershaft 34 is combined with the center of the intermediate gear 33,35, and the inner ring 12 of the output shaft 37 and hub spindle bearing portion 11 is coaxially
In conjunction with the output gear 36 is placed coaxially on the peripheral surface of output shaft 37, and the main body shell 38 accommodates the multiple tooth
Wheel and rotary shaft.Input shaft 32s extends along axis M, and jackshaft 34 extends along axis N, and output shaft 37 prolongs along axes O
It stretches.
Input gear 32 is the external gear of path, is formed in the directions axis M of the input shaft 32s along axis M configurations
The other end periphery multiple teeth.It is formed with along axis M extensions in the other end of the axis direction of input shaft 32s
The one end of the axis direction of motor rotation axis 22 is inserted into and makes it that can not be fitted into the relative rotation by centre bore.Input shaft
32s rotates freely the face portion for being supported in main body shell 38 in two end sides of input gear 32 via rolling bearing 32m, 32n
Divide 38f and back portion 38b.
Jackshaft 34 and the axes O of reduction part 31 extend parallel to, and the both ends of jackshaft 34 are rotated via bearing 34m, 34n
It is supported in the front portion 38f and back portion 38b of main body shell 38 freely.In the central portion of jackshaft 34, first
Between the axis N of gear 33 and the second intermediate gear 35 and jackshaft 34 be coaxially disposed.Among first intermediate gear 33 and second
Gear 35 is the helical gear of external tooth, and the diameter of the first intermediate gear 33 is bigger than the diameter of the second intermediate gear 35.First center tooth
Wheel 33 is configured in the position than the second intermediate gear 35 closer to the other side in the directions axis N, is engaged with input gear 32.The
Two intermediate gears 35 are configured in the position closer to the directions axis N side than the first intermediate gear 33, are nibbled with output gear 36
It closes.
As shown in Figure 1, the axis N of jackshaft 34 is configured in the position than axes O and axis M more top.In addition, intermediate
The axis N of axis 34 is configured in the position closer to vehicle front and than axis M closer to rear of vehicle than axes O.Slow down
Portion 31 is the three axis parallel-axes gears speed reducers with the axes O, N, M that extend parallel to each other.
Output gear 36 shown in Fig. 2 is external gear, is placed coaxially on the central portion of output shaft 37.Output shaft 37 along
Axes O extends.The one end in the axes O direction of output shaft 37 is inserted into the centre bore of inner ring 12 and relatively non-rotatably embedding
It closes.Described be fitted into is spline fitted or jigsaw fit.The portions inner ring flange 12c of the tooth top of output gear 36 and bottom of the tooth than inner ring 12
More major diameter, but the outside circle of output gear 36 is than outer ring Accessory Members 13c smallers.The side in the axes O direction of output gear 36
End is rotatably freely supported in the front portion 38f of main body shell 38 via rolling bearing 36m.The axes O of output shaft 37
Direction end side is rotatably supported in the back portion 38b of main body shell 38 via rolling bearing 36n such as.
Reduction part 31 passes through in the engagement of the driving gear of path and the driven gear of major diameter, i.e. input gear 32 and first
Between the engagement of gear 33 or the engagement of the second intermediate gear 35 and output gear 36 make the rotational deceleration of motor rotation axis 22
And it is transmitted to output shaft 37.
Main body shell 38 includes barrel and covers the front portion 38f and back portion at the both ends of the barrel
38b.Barrel covers the internal component of reduction part 31 in a manner of surrounding the axes O extended parallel to each other, N, M.Front
Part 38f covers the internal component of reduction part 31 from axis direction side.In front portion, 38f is formed with opening 38h.Opening
38h is fitted into a manner of storing the cylindrical portion 13e of outer ring Accessory Members 13c.The annular section 38c of zoning opening 38h includes to refer to
To the flat surface of axes O direction side, and it is equipped with from the flat internal thread hole 38g extended towards the axes O direction other side.
The radial direction size ratio axis direction thickness of annular section 38c is big.In addition, the axis direction thickness of annular section 38c is than master
The other parts thickness of body shell body 38 is big.
Internal thread hole 38g is configured with multiple, configuration correspondence spaced apartly centered on axes O, in a circumferential direction
The through hole 13h of the outer ring Accessory Members 13c.In addition, internal thread hole 38g is hole with the end.Be conducive to main body shell as a result,
38 leakproofness.
Back portion 38b covers the internal component of reduction part 31 from the axis direction other side.The back part of main body shell 38
It is the next door for combining motor field frame 25 and separating reduction part 31 and motor part 21 to divide 38b.Motor field frame 25 is supported in
Main body shell 38, the other side from main body shell 38 to axis direction are prominent.Like this, main body shell 38 accommodates reduction part 31
All rotating elements (rotary shaft and gear) cover the driving transmission path from motor part 21 to inner ring 12.
Input shaft 32s, jackshaft 34, output shaft 37 are by the rolling bearing by two supports.It is related to be mutually parallel
The axis direction position of axis M, N, O, the axis direction position phase mutual respect of rolling bearing 32m, 34m, 36m of axis direction side
It is folded.Further preferably, as illustrated in fig. 2, the axis direction size of described rolling bearing 32m, 34m, 36m is identical and axis side
It is all consistent to position.The axis direction position of rolling bearing 32n, 34n, 36n of the axis direction other side are overlapped.Further
Preferably, the axis direction size of described rolling bearing 32n, 34n, 36n are identical and axis direction position is all consistent.Among second
Gear 35 and output gear 36 are configured in axis direction side, and the axis direction position of the gear is overlapped.Further
Preferably, the axis direction size of the gear is identical and axis direction position consistency.Input gear 32 and the first intermediate gear
33 are configured in the axis direction other side, and the axis direction position of the gear is overlapped.Further preferably, the gear
Axis direction size is identical and axis direction position consistency.Thereby, it is possible to reduce the axis direction size of reduction part 31.
According to first embodiment, including outer ring 13, inner ring 12, hub spindle bearing portion 11, motor part 21, main body shell
38, wherein the inner ring 12 from the centre bore across outer ring 13 from outer ring 13 to axes O direction side prominent, the hub spindle
There are bearing portion 11 multiple rolling elements 14 of annulus of the configuration between outer ring 13 and inner ring 12, the motor part 21 to drive
Inner ring 12, the main body shell 38 cover the driving transmission path from motor part 21 to inner ring 12.Outer ring 13 includes outer ring cylinder
Component 13b, outer ring Accessory Members 13c, outer ring Accessory Members supporting part (internal thread hole 13f, through hole 13h, notch 13g,
13j), wherein the outer ring barrel member 13b has outer side track face 13m, 13n for 14 rolling of rolling element, the outer ring attached
Component 13c has the through hole of storage outer ring barrel member 13b and is entrenched in outer ring cylinder structure with defined axes O direction size Ls
The peripheral surface of part 13b, the outer ring Accessory Members supporting part are arranged on outer ring Accessory Members 13c and are used for and main body shell
38 or suspension bracket 102 combine.Inner ring 12 has for combining wheel rim W to from 13 one side end of axes O direction outstanding of outer ring
Wheel support portion (inner ring flange 12c).With the axes O directional correlation of hub spindle bearing portion 11, main body shell 38 and motor
Portion 21 is configured in the axes O direction other side of hub spindle bearing portion 11.Using the axes O direction center of region Lb as wheel hub
The axes O direction size Ls of the axis direction center CL of bearing portion 11, chimeric surface are configured in than axis direction centre bit
Set the position that CL is more biased towards axes O direction side (on the outside of vehicle width direction), wherein in the Lb of region, the rolling of hub spindle bearing portion 11
Kinetoplast 14 configures multiple row spaced apartly on axes O direction, and region Lb includes from the multiple row outer side track face 13m, 13n
Closest to axes O direction side outer side track face 13m until closest to the axes O direction other side outer side track face 13n
Region.
According to the first embodiment, outer ring 13 is not such as the integrally formed structure in the prior art for including flange
Part, but the outer ring Accessory Members 13c as the other components different from outer ring barrel member 13b is fixed on outer ring cylinder structure
The periphery of part 13b.Thereby, it is possible to freely manufacture the shape of outer ring Accessory Members 13c, outer ring Accessory Members supporting part (interior spiral shell
Pit 13f, through hole 13h, notch 13g, 13j) configuration freedom become larger, bolt space in the prior art can be solved and asked
Inscribe and make the axes O direction size ratio prior art smaller of in-wheel motor drive unit 10.In addition, passing through the attached structure in outer ring
Part 13c is connected to become the suspension bracket 102 of vehicle-body-side component, and thereby, it is possible to avoid wheel recast from being used in in-wheel motor driving dress
It sets in 10 main body shell 38.In addition, can on the outside of vehicle width direction release bolt 17, by hub spindle bearing portion 11 from main body shell
38 become to separation on the outside of vehicle width direction, the maintenance replacement of the inspection and hub spindle bearing portion 11 that make in-wheel motor drive unit 10
Simply.
In the first embodiment, Accessory Members 13c in outer ring is bound directly by bolt 15 and suspension bracket 102, is passed through
Bolt 17 is bound directly with main body shell 38.But suspension bracket 102 is separated with main body shell 38, the two is not bound directly.Picture
In this way, being connected with as the suspension bracket 102 of vehicle-body-side component in outer ring Accessory Members supporting part by outer ring Accessory Members 13c
It connects, so as to avoid wheel recast from being used for the main body shell 38 of in-wheel motor drive unit 10.
In addition, according to first embodiment, in outer ring, axes O direction one end of barrel member 13b is formed with to outer diameter pleurapophysis
The protrusion 13d gone out, in outer ring, the peripheral surface of the axes O direction other side of barrel member 13b is attached to the snap ring as limiting member
13r, outer ring Accessory Members 13c is between protrusion 13d and snap ring 13r.Outer ring Accessory Members 13c and outer ring barrel member as a result,
The relative movement of 13b is restricted.
In addition, according to first embodiment, the outer ring Accessory Members supporting part (internal thread hole of outer ring Accessory Members 13c
13f, through hole 13h, notch 13g, 13j) it is arranged at the position closer to outside diameter than inner ring supporting part (inner ring flange 12c)
It sets, need not ensure to store bolt 15,17 as a result, between inner ring supporting part (inner ring flange 12c) and outer ring Accessory Members 13c
Bolt space.Therefore, by inner ring supporting part (inner ring flange 12c) with than the prior art closer to the side of outer ring Accessory Members 13c
Formula is configured, and so that the protrusion length from 13 inner ring 12 outstanding of outer ring is shortened, is capable of providing than the prior art smallerization
In-wheel motor drive unit 10.
In addition, according to first embodiment, outer ring Accessory Members 13c include it is prominent to the axes O direction other side and with master
The chimeric cylindrical portion 13e of body shell body 38.Thereby, it is possible to main body shell 38 is reliably mounted on outer ring 13.
In addition, according to first embodiment, cylindrical portion 13e along the through hole 13s of outer ring Accessory Members 13c inner peripheral surface
Configuration, the inner peripheral surface of cylindrical portion 13e are contained in the axes O direction size Ls of chimeric surface.It is chimeric thereby, it is possible to fully ensure
Outer ring Accessory Members 13c is reliably mounted on outer ring barrel member 13b by the axes O direction size Ls in face.
Then illustrate second embodiment of the present invention.Fig. 6 is the expansion section view for indicating second embodiment of the present invention
Figure.The related second embodiment assigns identical symbol for structure identical with the embodiment and the description thereof will be omitted,
Illustrate different structures below.In this second embodiment, suspension bracket 102 is incorporated by main body shell 38 by bolt 19
Annular section 38c.
The thickness t2 of annular section 38c is formed thicklyer than the thickness t1 of the other parts of main body shell 38.In addition, in ring
In the 38c of shape region, be formed with spaced apartly in a circumferential direction it is multiple than outer ring Accessory Members 13c be located at more outside diameter and
To axes O direction side bearing surface 38a outstanding.It is equipped with internal thread hole 38i in each bearing surface 38a.Bearing surface 38a and interior spiral shell
Pit 38i is configured with corresponding to the through hole 102h of suspension bracket 102, and internal thread hole 38i is consistent with through hole 102h, with axes O
It extends parallel to.Bolt 19 is inserted into through hole 102h from axis direction side, is screwed together in internal thread hole 38i.
According to second embodiment, main body shell 38 includes the ring-type of the opening 38h and zoning opening 38h of storage outer ring 13
Region 38c, in the outer ring Accessory Members supporting part (through hole of the part combination outer ring Accessory Members 13c of annular section 38c
13h and another side end face), the other parts of annular section 38c are provided with the connection supporting part for connecting suspension bracket 102
(internal thread hole 38i).The thicker annular section 38c of middle thickness that will act on main body shell 38 again is taken turns as a result, without acting on
The other parts of thinner thickness in main body shell 38.Therefore, the stiffeners such as rib are set without in main body shell 38, favorably
In the lightweight of in-wheel motor drive unit 10.In addition, in this second embodiment, main body shell 38 is by bolt 17 and outside
Circle Accessory Members 13c bind directly, bound directly by bolt 19 and suspension bracket 102, but outer ring Accessory Members 13c not with hang
Frame torr frame 102 is bound directly.Suspension bracket 102 is only in contact with outer ring Accessory Members 13c.
Next, being illustrated to third embodiment of the present invention, Fig. 7 indicates third embodiment of the present invention
Sectional view is unfolded.About the third embodiment, same reference numeral is marked simultaneously for structure identical with the embodiment
It omits the description, it is described below for different structures.The third embodiment is by the fastening knot of bolt 15 shown in Fig. 3
The structure that the fastening structure of structure and bolt shown in fig. 6 19 is combined.
According to third embodiment, main body shell 38 includes the ring-type of the opening 38h and zoning opening 38h of storage outer ring 13
Region 38c, in the outer ring Accessory Members supporting part (through hole of a part and outer ring Accessory Members 13c of annular section 38c
13h and another side end face) it combines, the other parts of annular section 38c are provided with the connection for connecting suspension bracket 102
Supporting part (internal thread hole 38i).The thicker annular section 38c of middle thickness that will act on main body shell 38 again is taken turns as a result, without
The other parts of thinner thickness in main body shell 38 can be acted on.Therefore, the reinforcement structure such as rib is set without in main body shell 38
Part is conducive to the lightweight of in-wheel motor drive unit 10.In addition, in the third embodiment, suspension bracket 102 passes through spiral shell
Bolt 15 is bound directly with outer ring Accessory Members 13c, is bound directly by bolt 19 and main body shell 38.But without as institute
The such fastening structure bound directly with outer ring Accessory Members 13c and main body shell 38 of bolt 17 stated.Outer ring Accessory Members
13c and main body shell 38 are directly chimeric, but the fixation of the two is carried out by bolt 15.
More than, embodiments of the present invention are illustrated with reference to attached drawing, but the present invention do not limit to it is shown in the drawings
Embodiment.Embodiment shown in the drawings can be added various in the same range or equivalency range with the present invention
Modification or deformation.For example, illustrating hub spindle bearing portion 11 described in present embodiment in the axes O direction of inner ring canister portion 12b
The peripheral surface in centre portion constitutes inner track face, the axes O direction other side to inner ring canister portion 12b of the rolling element 14m of first row
End periphery is fitted into the structure of inner track circle 12r, however, not limited to this, can also be formed with lower structure, that is, not in inner ring cylinder
The peripheral surface of the axes O direction central portion of portion 12b constitutes the inner track face of the rolling element 14m of first row, and in other components
Other components, are embedded in the axes O direction of inner ring canister portion 12b by the inner track face for constituting the rolling element 14m of first row
Central portion.
Industrial availability
The in-wheel motor drive unit of the present invention can be effectively utilised in electric vehicle and hybrid vehicle.
Claims (7)
1. a kind of in-wheel motor drive unit comprising：
Hub spindle bearing portion, with outer ring, inner ring and multiple rolling elements, wherein the inner ring passes through the center of the outer ring
Outer ring described in Kong Bingcong is prominent to axis direction side, and the multiple rolling element is configured between the outer ring and the inner ring
Annulus；
Motor part drives the inner ring；And
Shell covers the driving transmission path up to the inner ring from the motor part,
The outer ring includes outer ring barrel member, outer ring Accessory Members and outer ring Accessory Members supporting part, wherein the outer ring cylinder
Component has the outer side track face for the rolling element rolling, and the outer ring Accessory Members, which have, stores the outer ring barrel member
Through hole is simultaneously chimeric with the peripheral surface of outer ring barrel member with defined axis direction size, the outer ring Accessory Members bearing
Portion be arranged on the outer ring Accessory Members and for both the shell and vehicle-body-side component or in which any one combination,
The inner ring has the inner ring supporting part for being combined with wheel from outer ring axis direction one end outstanding,
On the axis direction of the hub spindle bearing portion, the motor part is configured in the axis direction of the hub spindle bearing portion
The other side,
The outer side track face have multiple row and it is in the axial direction spaced apart configure,
The rolling element is spaced apart configured with more in the axial direction in a manner of each row rolling in the outer side track face
Row.
2. in-wheel motor drive unit according to claim 1, wherein
With comprising in outer side track face described in multiple row from the outer side track face closest to axis direction side up to closest to axis
In axis direction of the axis direction center in the region in the outer side track face of the direction other side as the hub spindle bearing portion
Heart position,
The outer ring Accessory Members are configured in the position that axis direction side is more biased towards than the axis direction center.
3. in-wheel motor drive unit according to claim 1 or 2, wherein
It is formed with to prominent raised in outer diameter side, in the outer ring barrel member in axis direction one end of the outer ring barrel member
The peripheral surface of the axis direction other side is attached to limiting member,
The outer ring Accessory Members are between the protrusion and the limiting member.
4. in-wheel motor drive unit according to claim 1, wherein
The outer ring Accessory Members supporting part is arranged at than the inner ring supporting part closer to the position of outside diameter.
5. in-wheel motor drive unit according to claim 1, wherein
The shell includes the annular section stored and be open described in the opening and zoning of the outer ring,
A part for the annular section is combined with the outer ring Accessory Members supporting part, in the other parts of the annular section
It is provided with the connection supporting part for connecting vehicle-body-side component.
6. in-wheel motor drive unit according to claim 1, wherein
The outer ring Accessory Members include the cylindrical portion prominent and chimeric with the shell to the axis direction other side.
7. in-wheel motor drive unit according to claim 6, wherein
The cylindrical portion is configured along the inner peripheral surface of the outer ring Accessory Members,
The inner peripheral surface of the cylindrical portion is contained in described the fixed axis direction size and chimeric with the outer ring barrel member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017055871A JP2018158618A (en) | 2017-03-22 | 2017-03-22 | In-wheel motor driving device |
| JP2017-055871 | 2017-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108621780A true CN108621780A (en) | 2018-10-09 |
Family
ID=63705874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810070965.6A Withdrawn CN108621780A (en) | 2017-03-22 | 2018-01-24 | In-wheel motor drive unit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2018158618A (en) |
| CN (1) | CN108621780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110588310A (en) * | 2019-09-27 | 2019-12-20 | 上海中科深江电动车辆有限公司 | Electric drive device |
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| JP2001199202A (en) * | 2000-01-20 | 2001-07-24 | Ntn Corp | Wheel bearing device |
| JP2008273406A (en) * | 2007-04-27 | 2008-11-13 | Toyota Motor Corp | Wheel drive device |
| JP2009012569A (en) * | 2007-07-03 | 2009-01-22 | Ntn Corp | In-wheel motor drive device |
| CN102666171A (en) * | 2009-11-13 | 2012-09-12 | Ntn株式会社 | In-wheel motor driving device |
| CN103338961A (en) * | 2011-01-21 | 2013-10-02 | Ntn株式会社 | In-wheel motor drive device |
| CN102791505A (en) * | 2011-03-07 | 2012-11-21 | Ntn株式会社 | Drive device for electric vehicle |
| JP2013129283A (en) * | 2011-12-21 | 2013-07-04 | Ntn Corp | Drive device for electric vehicle |
| CN104854376A (en) * | 2012-10-03 | 2015-08-19 | Ntn株式会社 | In-wheel motor driving device |
| JP2015147491A (en) * | 2014-02-06 | 2015-08-20 | 日産自動車株式会社 | Electric driving unit |
| CN108633266A (en) * | 2017-01-18 | 2018-10-09 | Ntn株式会社 | In-wheel motor drive unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110588310A (en) * | 2019-09-27 | 2019-12-20 | 上海中科深江电动车辆有限公司 | Electric drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018158618A (en) | 2018-10-11 |
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