CN109552025A - In-wheel motor drive unit - Google Patents
In-wheel motor drive unit Download PDFInfo
- Publication number
- CN109552025A CN109552025A CN201810313495.1A CN201810313495A CN109552025A CN 109552025 A CN109552025 A CN 109552025A CN 201810313495 A CN201810313495 A CN 201810313495A CN 109552025 A CN109552025 A CN 109552025A
- Authority
- CN
- China
- Prior art keywords
- shell
- vehicle
- wheel
- store oil
- 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.)
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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
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R17/00—Arrangements or adaptations of lubricating systems or devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/06—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
Abstract
The present invention relates to a kind of in-wheel motor drive units.Even if the in-wheel motor drive unit is being had to make on the inside of vehicle width direction of a part of shell to wheel rim in situation outstanding, also the driving portion for being contained in shell can suitably be carried out it is cooling, lubricate.In-wheel motor drive unit (10) has: the shell (11) of driving portion (20) and receiving driving portion (20) with motor (21), shell (11) is provided with mounting portion (12) and store oil portion (13) of ball-and-socket joint (6), the ball-and-socket joint is used to for lower arm (3) being rotatably linked to the bottom of shell (11), the lubricating oil (14) that store oil portion storage should be supplied to the driving portion (20) in driving.Store oil portion (13) configuration is configured to covering mounting portion (12) when from vehicle front-rear direction from relative to mounting portion (12) position that (vehicle front side) is offset by vehicle front-rear direction.
Description
Technical field
The present invention relates to a kind of in-wheel motor drive units.
Background technique
For example, the following Patent Document 1 discloses following in-wheel motor drive unit, which is driven
Dynamic device has: the driving portion with motor, the wheel bearing that the output of driving portion is transmitted to wheel and receiving are driven
Dynamic portion and the shell for supporting wheel bearing, the rotation center of motor and the rotation center bias configuration of wheel bearing.
In the in-wheel motor drive unit, shell with have as the strut of sprung parts and the draft hitch of lower arm
(suspension) link, so that device configured in one piece is inside wheel rim.Strut is rotatably linked to shell via bracket
Top, the end on the outside of the vehicle width direction of lower arm is rotatably linked to the bottom of shell via ball-and-socket joint.
In the in-wheel motor drive unit of patent document 1, being provided in shell should supply for storing to driving portion
The store oil portion (store oil space) for the lubricating oil given.The lubricating oil in store oil portion is stored in the driving of in-wheel motor drive unit
It is supplied and having oil pump and the oily lubricating structure for supplying road to driving portion, cooling is carried out to driving portion, is lubricated.
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2015-214273 bulletin
However, needing high torque (HT) in the case where especially carrying in-wheel motor drive unit in large-scale vehicle
In-wheel motor drive unit.In order to realize high torque (HT) and in-wheel motor drive unit excellent in reliability, need to take example
Such as using large-scale motor, and in order to suitably carry out volume that is cooling and increasing store oil portion to large-scale motor
Lead to the countermeasure of the enlargement of shell Deng as.However, the relationship in wheel rim is configured at based on in-wheel motor drive unit,
The enlargement radially of shell exists to be limited by wheel rim size bring.Therefore, in order to realize the in-wheel motor of high torque (HT)
Driving device sometimes has to keep shell enlarged in the vehicle width direction.
By making that shell integrally can not be accommodated in inside wheel rim and shell is enlarged in the vehicle width direction, the vehicle of shell
A part on the inside of wide direction is in outside (on the inside of vehicle width direction) situation outstanding of wheel rim, in bouncing when driving for motor vehicle
The flying object such as finger stone be easy to collide with housing bottom.At this point, if as described in Patent Document 1, being set to a wide range spreading
Store oil portion (store oil space) is integrally formed in the bottom for the shell set, then exists because flying object and housing bottom collision due to generate oil leak
The problem of.
Summary of the invention
In view of above actual conditions, the main purpose of the present invention is to provide a kind of in-wheel motor drive units, should
Even if in-wheel motor drive unit is being had to make on the inside of vehicle width direction of a part of shell to wheel rim in situation outstanding,
Also cooling can be suitably carried out to the driving portion for being contained in shell, lubricate.
Means for solving the problems
The present invention completed to achieve the goals above is related to a kind of in-wheel motor drive unit, has: having
It the driving portion of motor, wheel bearing and accommodates driving portion and supports the shell of wheel bearing, be provided in shell
Mounting portion and store oil portion, the mounting portion are equipped with the ball-and-socket joint of the bottom for lower arm to be rotatably linked to shell,
The store oil portion is used to store the lubricating oil that should be supplied to the driving portion in driving, the rotation center and wheel bearing of motor
The rotation center bias configuration in portion, which is characterized in that store oil portion configuration relative to the mounting portion on vehicle front-rear direction
The position offset by, and be set as covering the mounting portion when from vehicle front-rear direction.
If as described above, store oil portion configuration relative to ball-and-socket joint mounting portion on vehicle front-rear direction (vehicle
Front side or rear side) position that offsets by, then it is bounced when being equipped with the vehicle driving of in-wheel motor drive unit
The flying object such as finger stone are not easy to collide with shell (forming portion in the store oil portion in shell), therefore can reduce oil leak as much as possible
Occurrence risk.In addition, store oil portion is set as, the mounting portion of ball-and-socket joint is covered when store oil portion from vehicle front-rear direction,
Therefore the volume in store oil portion can be fully ensured.Therefore, even if can also store using large-scale motor
It is stored in oily portion and lubricating oil that is cooling, lubricating required sufficient amount is suitably carried out to the driving portion for including the motor.
Lower arm is rotatably linked to the bottom of shell via ball-and-socket joint, therefore for example in wheel to follow road surface
When concave-convex mode is bounced and spring back, there are the bottom of shell (part in the is formationed store oil portion of shell) and lower arm interfere can
It can property.The problem can prevent as much as possible for example, by being bent lower arm to the lower side, but the minimum for generating vehicle is liftoff
The other problems that gap is lower.
Therefore, in the present invention, the bottom in store oil portion is provided with the first rake, first rake is from vehicle width direction
Outside is gradually deviated to the upper side of vehicle towards vehicle width direction inside.So, even if not taking makes lower arm downwards
The countermeasure of lateral bend also can be avoided the interference in shell (the store oil portion) and lower arm when wheel rebound.In addition, according to above-mentioned knot
Structure, the then lubricating oil for being stored in store oil portion are not easy to be offset to the vehicle width direction inside region in store oil portion.Thus, for example, in store oil
In the case that portion's opening has the suction inlet for the oil distributing pipe to driving portion supply lubricating oil, if suction inlet is configured at store oil portion
Vehicle width direction lateral area, then can reduce the possibility exposed in the above-mentioned suction inlet such as Ackermann steer angle to atmosphere as much as possible
Property.Can also lubricating oil be stably supplied to driving portion in Ackermann steer angle etc. as a result,.
Or the bottom in store oil portion is provided with the second rake, which opens with in store oil portion
Separating distance of the suction inlet of the oil distributing pipe of mouth on vehicle front-rear direction increases and gradually deviates to the upper side of vehicle.In this way
One, it a possibility that above-mentioned suction inlet exposes to atmosphere such as can reduce in the acceleration-deceleration of vehicle as much as possible.
In above structure, or, it is additionally provided in driving portion by the deceleration of the rotation deceleration output of motor
Device.It, can be using the parallel of the multiple gears (gear shaft) configured in parallel to each other with Pivot axle as the retarder
Shaft gear retarder.
Invention effect
As a result, according to the present invention, in the in-wheel motor drive unit that retarder applies parallel-axes gears retarder,
Can in the case where not leading to enlargement, the complication etc. of device entirety, to constitute parallel-axes gears retarder gear that
This engaging section is efficiently lubricated, cools down.Thereby, it is possible to realize light-duty, small-sized and excellent in reliability in-wheel motor
Driving device.
Detailed description of the invention
Fig. 1 is from vehicle rear side observation group equipped with in-wheel motor drive unit involved in embodiments of the present invention
Vehicle the near front wheel suspension frame structure when synoptic diagram.
Fig. 2 is the summary front view of in-wheel motor drive unit.
Fig. 3 be Fig. 2 line A-A to view schematic cross sectional view.
Fig. 4 is the B-C-D line schematic cross sectional view of Fig. 2.
The synoptic diagram near housing bottom when Fig. 5 is vehicle driving.
Description of symbols
1 draft hitch；
3 lower arms；
6 ball-and-socket joints；
10 in-wheel motor drive units；
11 shells；
12 (ball-and-socket joint) mounting portions；
13 store oil portions；
14 lubricating oil；
15 first rakes；
16 second rakes；
20 driving portions；
21 motor；
30 retarders；
40 wheel bearings；
50 lubricating structures；
51 oil pumps；
52 oil distributing pipes；
53 sucking pipings；
54 supply pipings；
K central pin shaft.
Specific embodiment
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is from vehicle rear side observation group equipped with in-wheel motor drive unit involved in embodiments of the present invention
The synoptic diagram when suspension frame structure of the near front wheel of 10 vehicle (such as electric vehicle).In-wheel motor drive unit 10 is via suspension
Device 1 is linked to vehicle frame 4, and draft hitch 1 has strut 2, the lower arm (for example, A type lower arm) 3 as suspension link.Strut 2 it is upper
End (end of vehicle up direction side) is rotatably linked to vehicle frame 4, lower end (end of vehicle lower side) energy of strut 2
Enough knuckles 5 being rotationally linked in the setting of shell 11 of in-wheel motor drive unit 10.On the inside of the vehicle width direction of lower arm 3
The end of (following to be also referred to as " inner disc side ") is rotatably linked to vehicle frame 4, (is also referred to as below on the outside of the vehicle width direction of lower arm 3
Make " external disk side ") end be rotatably linked to in-wheel motor drive unit 10 via ball-and-socket joint 6 (referring to Fig. 2)
The bottom of shell 11.
Above-mentioned draft hitch 1 is a kind of Jackstay type as independent suspension formula, but in-wheel motor drive unit 10
Vehicle frame 4 can also be linked to via the draft hitch using double wish-bone arm type, other suspending ways.It should be noted that supportting
In the draft hitch 1 of rod-type, strut 2 is also functioned as upper arm, therefore is set as required member of formation with by upper arm
So-called double wish-bone arm type is compared, and has light-duty, small and inexpensive speciality.
By the center of rotation (ball-and-socket joint of the end of the external disk side of the center of rotation and lower arm 3 of the upper end of connection strut 2
6) straight line defines and central pin shaft (imaginary centres pin shaft) K of the turning center of front-wheel when as steering operation is with thereon
The mode that portion is located at the position than lower part on the inside of vehicle width direction tilts regulation relative to the up and down direction (vertical direction) of vehicle
Angle.The separating distance at the ground connection center of the road surface intersection point and wheel (front-wheel) of the extended line by central pin shaft K is defined
Centrepin biasing the straight stability of the operability, vehicle that turn to more reduces in general, the centrepin biasing the big.Therefore, ball
And-socket joint 6 is installed on the end of the external disk side of the bottom of shell 11 (near end).
Fig. 2 is that the summary front view of in-wheel motor drive unit 10 (is driven from left sides in-wheel motor shown in FIG. 1
Figure when dynamic device 10), Fig. 3 is the line A-A of Fig. 2 to view schematic cross sectional view, and Fig. 4 is the B-C-D line schematic cross sectional view of Fig. 2.Such as
Shown in Fig. 2~Fig. 4, in-wheel motor drive unit 10 has: generate driving force driving portion 20, by the output of driving portion 20 to
The wheel bearing 40 of front-wheel transmitting and the shell 11 for accommodating driving portion 20 and being installed for wheel bearing 40.This implementation
The deceleration that the driving portion 20 of mode has motor 21 and exports the rotation deceleration of motor 21 to wheel bearing 40
The rotation center of device 30, motor 21 and wheel bearing 40 is configured in mutually different position (bias configuration).
As shown in figure 3, motor 21 is radial gap type motor, have: being fixed on the stator 22 of shell 11, in stator
22 internal side diameter is installed on the motor rotation axis of periphery across radial clearance rotor 23 arranged opposite and by rotor 23
24.Motor rotation axis 24 can be configured in two along its axial separation with per minute 10,000 thousands of revolving speed rotations for turning left right
The bearing of rolling bearing 25,26 of a position is to rotate freely relative to shell 11.As motor 21, radial clearance can replace
Type, and use stator 22 and the axial-gap arranged opposite across axial gap of rotor 23.
Retarder 30 is by (the rotation center of each gear with multiple gears and the rotation center bias configuration of each gear
Axis configures in parallel to each other) so-called parallel-axes gears retarder constitute.The retarder 30 of present embodiment is triple axle
Retarder has: input gear 31 is coaxially configured with motor rotation axis 24, and can integrally rotatably with motor
Rotary shaft 24 links；Output gear 33 is coaxially configured with the rotation center of wheel bearing 40, and can be integrally rotatably
Link with the input side (wheel hub 41) of wheel bearing 40；And intermediate gear 32, it configures in input gear 31 and output gear
Between wheel 33.Intermediate gear 32 has the large diameter gear portion 32a that engages with input gear 31 and engages with output gear 33
Small-diameter gear portion 32b.The gear ratio input gear 31 of the large diameter gear portion 32a of intermediate gear 32 and the path of intermediate gear 32
The number of teeth of gear part 32b is more, and the number of teeth of the small-diameter gear portion 32b of the gear ratio intermediate gear 32 of output gear 33 is more.According to this
The rotation two stages of motor rotation axis 24 are slowed down and are passed to wheel bearing 40 by the retarder 30 of structure, present embodiment
It passs.
Although the detailed illustration is omitted, it is preferable to use so-called helical gears for each gear 31~33 of composition retarder 30.
The number of teeth that helical gear engages simultaneously is more, tooth contact dispersion, therefore has the advantages that sound when engagement is small and cogging is few.Cause
This, if using helical gear, it is advantageous at 30 aspect of retarder for realizing quiet and excellent torque transfer efficiency.
As shown in figure 4, wheel bearing 40 is the revolving wheel bearing of so-called inner ring.Wheel bearing 40 is by double
Column angular contact ball bearing constitute, the double-row angular contact bal bearing include the inner member 43 being made of wheel hub 41 and inner ring 42,
Outer ring 44, multiple balls 47 and retainer (not shown).Although the detailed illustration is omitted, in wheel bearing 40
Portion space is filled with the lubricating grease as lubricant.Entrance and lubricating grease of the foreign matter to bearing interior space are to axis in order to prevent
External leakage is held, the axial ends portion of wheel bearing 40 is provided with containment member.
Wheel hub 41 can integrally rotatably link with the axle portion of output gear 33 by the way that spline is chimeric.In the outer of wheel hub 41
The end periphery of disk side is provided with flange part 41a (referring to Fig. 2), is equipped with the brake disc and wheel of front-wheel in flange part 41a
Circle.The fastening part 41b being fastened and fixed to inner ring 42 is formed in the end of the inner disc side of wheel hub 41.Fastening part 41b is to vehicle
Wheel applies precompressed with bearing 40.
It is formed with the inner track face 45 of external disk side in the periphery of wheel hub 41, is formed with inner disc side in the periphery of inner ring 42
Inner track face 45.Inner circumferential in outer ring 44 be formed with the outer side track face 46 in two inner track faces 45,45 corresponding biserials,
Multiple balls 47 are assembled in the ball road formed by pairs of inner track face 45 and outer side track face 46.44 one of outer ring
Ground has the flange part 44a extended from the end of its external disk side towards radial outside, will pass through flange part 44a and retaining ring 49
It has carried out being fixed on shell 11 relative to 48 bolt of associate member of the positioning of outer ring 44.
As shown in Figure 3 and 4, shell 11 have cylindrical member 11A, respectively occlude cylindrical member 11A external disk side with
And the first The lid component 11B and the second The lid component 11C, above three component 11A~11C of the opening portion of inner disc side are used and are not schemed
The bolt component that shows and link.Pacify as shown in Fig. 2, being provided integrally in shell 11 (the first The lid component 11B) for ball-and-socket joint 6
The mounting portion 12 of dress.Based on above-mentioned reason, which is arranged near the end of the external disk side of the bottom of shell 11 (ginseng
According to Fig. 3).
In the in-wheel motor drive unit 10 of structure more than having, exchanged when being supplied to the stator 22 of motor 21
Electric current and when generating electromagnetic force, rotor 23 and motor rotation axis 24 rotate.The rotation of motor rotation axis 24 is decelerated device
It is transmitted after 30 decelerations to wheel bearing 40.Therefore, even if the case where using motor 21 of low torque and high-speed rotation type
Under, can also transmit makes front-wheel with torque needed for fixing speed rotation.
As shown in Figure 2 to 4, in-wheel motor drive unit 10 be also equipped with for the driving portion 20 in driving repeatedly
The lubricating structure 50 of (uninterrupted) supply lubricating oil 14.
Lubricating structure 50 has: oil pump 51 and oil distributing pipe 52 and be set to shell 11 and storage should be via oil pump 51
And the store oil portion 13 of oil distributing pipe 52 and the lubricating oil 14 to the supply of driving portion 20, in the present embodiment, the inside of shell 11
The bottom side region in space is functioned as store oil portion 13.
The inner disc side of output gear 33 of the adjacent configuration of oil pump 51 in retarder 30, herein using being configured to output gear
It takes turns 33 rotation and is lubricated oily 14 sucking and the pump of discharging operation.
Oil distributing pipe 52 has: the sucking piping extended from the suction inlet of oil pump 51 towards store oil portion 13 (inner space)
53 and from the outlet of oil pump 51 extend supply with piping 54.As shown in FIG. 2 and 3, the sucking of sucking piping 53
Mouth is configured to most deep (here, near for end of external disk side) opening in store oil portion 13.
As shown in figure 4, supply 54 mainly has with being piped: the first supply pipe 55, motor 21 lower side along vehicle
Wide direction extends, the open-ended outlet for being arranged adjacent to oil pump 51 of external disk side；Oil circuit 56, setting are constituting shell 11
The second The lid component 11C inside and vertically extend, lower end is open-ended with the inner disc side of the first supply pipe 55
It is connected；And second supply pipe 57, it is configured at the upper side of motor 21 and is extended along the width of the car, the end of inner disc side is opened
Mouth is connected with the upper end of oil circuit 56.As shown in Fig. 2, the supply is cut with piping 54 in the substantially position directly above of input gear 31
Only.That is, the end of the external disk side of the second supply pipe 57 is configured in the substantially position directly above of input gear 31.Moreover, working as oil pump
51 are lubricated the sucking of oil 14 and discharging operation with the rotation of output gear 33, to arrange from the outlet of oil pump 51
Out when lubricating oil 14, which supplies (lubricating oil 14 to motor 21 and retarder 30 with piping 54 via supply
Flowing referring to the hollow arrow in Fig. 4).
It is more specifically illustrated, the second supply pipe 57 is provided with the outlet 57a that diametric plane is open inside and outside it, from this
The lubricating oil 14 that (dripping) is discharged in outlet 57a is supplied to the upper end of motor 21.It supplies to the upper end of motor 21
Lubricating oil 14 is affected by gravity and moves and cool down to the lower side to stator 22 and rotor 23, finally falls to
Store oil portion 13 and be recovered.In addition, when the (end of supply piping 54 open-ended 57b from the external disk side of the second supply pipe 57
End opening portion) removal of lubricant 14 when, which supplies (referring to Fig. 2) to the input gear 31 of retarder 30, to defeated
Enter after gear 31 (engaging section of the large diameter gear portion 32a of input gear 31 and intermediate gear 32) is lubricated, cools down, falls to
Store oil portion 13 and be recovered.
In the present embodiment, as shown in Fig. 2, by the way that a part of region of the lower side of output gear 33 is impregnated in store oil
The lubricating oil 14 stored in portion 13 is to carry out lubrication, the cooling of output gear 33, and with the rotation of output gear 33
The lubricating oil 14 for being stored in store oil portion 13 is swept and (splash) to carry out lubrication, the cooling of intermediate gear 32.Therefore, it is set to
The store oil portion 13 of shell 11 is formed as, and the lubricating oil 14 for being stored in store oil portion 13 can be with a part (always) of output gear 33
Contact.Therefore, the upper-end part of driving in store oil portion 13 is in the position of the lower end side against the top than output gear 33.
As shown in Fig. 2, the configuration of store oil portion 13 is in the mounting portion 12 relative to the ball-and-socket joint 6 for being set to shell 11 and in vehicle
The position of front-rear direction (being in the present embodiment vehicle front side) offset.As a result, in the vehicle for being equipped with in-wheel motor
The flying object such as the finger stone bounced when driving are not easy to collide with shell 11 (forming portion in the store oil portion 13 in shell 11), therefore
The occurrence risk of oil leak caused by the damage because of shell 11 can be reduced as much as possible.In particular, if as in the present embodiment,
The position that the mounting portion 12 relative to ball-and-socket joint 6 is offset by vehicle front side configure store oil portion 13, then with relative to
The case where position configuration store oil portion 13 that mounting portion 12 is offset by vehicle rear side, is compared, and flying object and shell 11 can be reduced
Store oil portion 13 forming portion collision a possibility that, therefore it is advantageous in terms of the occurrence risk for reducing oil leak.
In addition, schematically shown in Figure 3 like that, store oil portion 13 is set as, in the store oil portion from vehicle front-rear direction
When 13, the mounting portion 12 of ball-and-socket joint 6 is covered.That is, position of the lower end in store oil portion 13 positioned at the lower end than mounting portion 12 on the lower
It sets, the upper end in store oil portion 13 is located at the position more upper than the upper end of mounting portion 12, and the end of the external disk side in store oil portion 13 is located at
Than the position that external disk side is leaned in the end of the external disk side of mounting portion 12, the end of the inner disc side in store oil portion 13 is located at than mounting portion 12
The position of inner disc side is leaned in the end of inner disc side.Thereby, it is possible to fully ensure the volume in store oil portion 13.Therefore, even if using
In the case where large-scale motor 21, it is appropriate to the driving portion 20 including the motor 21 to be also stored in store oil portion 13
Ground carries out lubricating oil 14 that is cooling, lubricating required sufficient amount.
In addition, as shown in figure 3, being provided with from external disk side towards inner disc side in the bottom in store oil portion 13 gradually to the upper of vehicle
The rake (the first rake) 15 of square side offset.So, even if not taking makes the curved countermeasure to the lower side of lower arm 3,
Also it can be avoided the interference of the shell 11 and lower arm 3 when the spring and rebound of front-wheel (referring to Fig. 5).In this case, also have
Have can prevent it is excellent because the minimum ground clearance of the vehicle that generates lower arm 3 due to bending to the lower side reduces the drawbacks of
Gesture.
In addition, if being provided with the first above-mentioned rake 15 in the bottom in store oil portion 13, the suction inlet with oil distributing pipe 52
It is configured to combine in the structure that the most deep (near the end of external disk side) in store oil portion 53 is open, can reduce as far as possible
A possibility that through oil holes such as Ackermann steer angle expose to atmosphere (referring to Fig. 5).As a result, Ackermann steer angle etc. also can be to drive
Lubricating oil 14 is stably supplied in dynamic portion 20.
Also, as shown in Fig. 2, be provided with the second rake 16 in the bottom in store oil portion 13, second rake 16 with
Separating distance increases and gradually deviates to the upper side of vehicle in the front-back direction with the vehicle of through oil hole, in present embodiment
In, the vehicle front side of through oil hole and rear side both sides are provided with the second rake 16.So, though with
The acceleration-deceleration of vehicle and be stored in the pasta of the lubricating oil 14 in store oil portion 13 relative in the inclined situation of vehicle front-rear direction,
Also it can reduce a possibility that through oil hole exposes to atmosphere as much as possible.It therefore, can when the acceleration-deceleration in vehicle
It is enough that lubricating oil 14 is stably supplied to driving portion 20.
It should be noted that second rake 16 can be provided only on the vehicle front side and rear side of through oil hole
Either one, but in this case, a possibility that through oil hole exposes to atmosphere when during acceleration of the vehicle or slowing down, improves.Cause
This, is preferably provided with the second rake in the vehicle front side of through oil hole and rear side both sides as in the present embodiment
16。
Function and effect described above be combined with each other, so that the in-wheel motor drive unit 10 of present embodiment has energy
It is enough to the driving portion 20 for being contained in shell 11 suitably carry out it is cooling, lubricate and speciality excellent in reliability.
More than, in-wheel motor drive unit 10 involved in one embodiment of the present invention is illustrated, but this
The embodiment of invention is not limited to this.
For example, in the embodiment described above, as the oil pump 51 for constituting lubricating structure 50, using with deceleration
The rotation (utilizing the rotation of output gear 33) of the output gear 33 of device 30 and be lubricated oil 14 sucking and discharging operation
Type, but as oil pump 51, such as can also be using other types such as DYN dynamic oil pumps.In addition, in reality described above
It applies in mode, oil pump 51 is configured to the inner space of shell 11, but oil pump 51 can also be configured at the outside of shell 11.
In addition, in the embodiment described above, by the lubricating oil 14 that is supplied by lubricating structure 50 only to retarder
It is in 30, be essentially that input gear 31 (engaging section of the large diameter gear portion 32a of input gear 31 and intermediate gear 32) carries out
Lubrication, cooling, but as long as there is no problem for the arrangement of the oil distributing pipe 52 (being especially supplied with piping 54) in shell 11, lubricating machine
Structure 50 is also configured to, and also supplies lubricating oil 14 at least one party of intermediate gear 32 and output gear 33.
In addition, in the embodiment described above, by along vehicle width direction and the planar portions of vehicle front-rear direction extension,
First rake 15 and the second rake 16 constitute the bottom in store oil portion 13, but the bottom in store oil portion 13 can also be only by first
The composition (illustration omitted) of rake 15 and the second rake 16.
In addition, in the embodiment described above, using the rotation second level of motor rotation axis 24 is slowed down and to
The retarder (parallel-axes gears retarder) 30 that wheel bearing 40 transmits, but retarder 30 is also configured to, by motor
The rotation three-level of rotary shaft 24 is transmitted with Shangdi deceleration to wheel bearing 40.More than also, driven to by in-wheel motor
Device 10 be assembled in the front-wheel of vehicle and using the case where be illustrated, but can also be 10 groups by in-wheel motor drive unit
Rear-wheel loaded on vehicle and use.
The present invention is not by above-mentioned any restriction of embodiment, without departing from the spirit and scope of the invention, additionally it is possible to
Implement in various ways.That is, the scope of the present invention is shown by the range of entitlement requests, and including the range with entitlement requests
Record whole changes in equivalent meaning and range.
Claims (5)
1. a kind of in-wheel motor drive unit, has: driving portion, wheel bearing portion and receiving with motor
The driving portion and the shell for supporting the wheel bearing portion, are provided with mounting portion and store oil portion, the peace in the shell
Dress portion is equipped with the ball-and-socket joint of the bottom for lower arm to be rotatably linked to the shell, and the store oil portion is for storing
Should driving portion supply into driving lubricating oil, the rotation center of the motor and the wheel bearing portion
Rotation center bias configuration, which is characterized in that
The store oil portion configuration is set as in the position offset by vehicle front-rear direction relative to the mounting portion
The mounting portion is covered when from vehicle front-rear direction.
2. in-wheel motor drive unit according to claim 1, wherein
The bottom in the store oil portion is provided with the first rake, first rake is on the outside of vehicle width direction towards vehicle width direction
Inside and gradually to the upper side of vehicle deviate.
3. in-wheel motor drive unit according to claim 1, wherein
The bottom in the store oil portion is provided with the second rake, which matches with what is be open in the store oil portion
Separating distance of the suction inlet of oil pipe on vehicle front-rear direction increases and gradually deviates to the upper side of vehicle.
4. in-wheel motor drive unit according to claim 2, wherein
The bottom in the store oil portion is provided with the second rake, which matches with what is be open in the store oil portion
Separating distance of the suction inlet of oil pipe on vehicle front-rear direction increases and gradually deviates to the upper side of vehicle.
5. in-wheel motor drive unit according to any one of claim 1 to 4, wherein
The driving portion also has the retarder that the rotation of the motor is slowed down and is exported,
The retarder is made of the parallel-axes gears retarder of the multiple gears configured in parallel to each other with Pivot axle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-186583 | 2017-09-27 | ||
| JP2017186583A JP6917849B2 (en) | 2017-09-27 | 2017-09-27 | In-wheel motor drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109552025A true CN109552025A (en) | 2019-04-02 |
Family
ID=65864511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810313495.1A Pending CN109552025A (en) | 2017-09-27 | 2018-04-09 | In-wheel motor drive unit |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6917849B2 (en) |
| CN (1) | CN109552025A (en) |
| WO (1) | WO2019065808A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005335514A (en) * | 2004-05-26 | 2005-12-08 | Toyota Motor Corp | Wheel supporting device |
| WO2014168092A1 (en) * | 2013-04-12 | 2014-10-16 | Ntn株式会社 | In-wheel motor drive device |
| JP2015107709A (en) * | 2013-12-04 | 2015-06-11 | トヨタ自動車株式会社 | Oil supply device |
| JP2015194195A (en) * | 2014-03-31 | 2015-11-05 | Ntn株式会社 | in-wheel motor drive device |
| JP2015214273A (en) * | 2014-05-12 | 2015-12-03 | トヨタ自動車株式会社 | In-wheel motor unit |
| JP2016083999A (en) * | 2014-10-24 | 2016-05-19 | Ntn株式会社 | Structure for lubricating in-wheel motor drive device |
| JP2017165279A (en) * | 2016-03-16 | 2017-09-21 | Ntn株式会社 | Connection structure of in-wheel motor drive device and suspension device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6269396B2 (en) * | 2014-09-04 | 2018-01-31 | アイシン・エィ・ダブリュ株式会社 | Vehicle drive device |
| JP2017150640A (en) * | 2016-02-26 | 2017-08-31 | Ntn株式会社 | In-wheel motor drive device |
| JP2017159883A (en) * | 2016-03-07 | 2017-09-14 | Ntn株式会社 | In-wheel motor driving device |
| JP6792995B2 (en) * | 2016-03-14 | 2020-12-02 | Ntn株式会社 | In-wheel motor drive |
-
2017
- 2017-09-27 JP JP2017186583A patent/JP6917849B2/en active Active
-
2018
- 2018-04-09 CN CN201810313495.1A patent/CN109552025A/en active Pending
- 2018-09-27 WO PCT/JP2018/035868 patent/WO2019065808A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005335514A (en) * | 2004-05-26 | 2005-12-08 | Toyota Motor Corp | Wheel supporting device |
| WO2014168092A1 (en) * | 2013-04-12 | 2014-10-16 | Ntn株式会社 | In-wheel motor drive device |
| JP2015107709A (en) * | 2013-12-04 | 2015-06-11 | トヨタ自動車株式会社 | Oil supply device |
| JP2015194195A (en) * | 2014-03-31 | 2015-11-05 | Ntn株式会社 | in-wheel motor drive device |
| JP2015214273A (en) * | 2014-05-12 | 2015-12-03 | トヨタ自動車株式会社 | In-wheel motor unit |
| JP2016083999A (en) * | 2014-10-24 | 2016-05-19 | Ntn株式会社 | Structure for lubricating in-wheel motor drive device |
| JP2017165279A (en) * | 2016-03-16 | 2017-09-21 | Ntn株式会社 | Connection structure of in-wheel motor drive device and suspension device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6917849B2 (en) | 2021-08-11 |
| WO2019065808A1 (en) | 2019-04-04 |
| JP2019059391A (en) | 2019-04-18 |
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