CN110315959A - The connecting structure of in-wheel motor drive unit and draft hitch - Google Patents
The connecting structure of in-wheel motor drive unit and draft hitch Download PDFInfo
- Publication number
- CN110315959A CN110315959A CN201810351658.5A CN201810351658A CN110315959A CN 110315959 A CN110315959 A CN 110315959A CN 201810351658 A CN201810351658 A CN 201810351658A CN 110315959 A CN110315959 A CN 110315959A
- Authority
- CN
- China
- Prior art keywords
- wheel motor
- drive unit
- motor drive
- bracket
- pod
- 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.)
- Pending
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- 239000000725 suspension Substances 0.000 claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000270295 Serpentes Species 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G3/00—Resilient suspensions for a single wheel
- B60G3/18—Resilient suspensions for a single wheel with two or more pivoted arms, e.g. parallelogram
- B60G3/28—Resilient suspensions for a single wheel with two or more pivoted arms, e.g. parallelogram at least one of the arms itself being resilient, e.g. leaf spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
-
- 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
-
- 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
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
The present invention provides the connecting structure of in-wheel motor drive unit and draft hitch, and space saving can be sought by providing, and improves the in-wheel motor of suspension performance, intensity and durability and the connecting structure of suspension.Connecting structure of the invention have the suspension bracket (17) set on in-wheel motor drive unit (10), draft hitch lower arm (42), by suspension bracket (17) and lower arm connection ball-and-socket joint (51).Ball-and-socket joint (51) have the stud (52) vertically extended, set on the end of stud bulb (53), be packed in the pod (54) in bulb.Suspension bracket (17) has inner space, the slit (58) connecting with inner space and the bolt (59) and nut (60) that pod (54) is fixed on to suspension bracket (17) by constriction slit (58) for the lateral surface for keeping pod (54).Pod (54) is faced across up and down direction gap (G) and main body shell (39) surface of in-wheel motor drive unit (10).
Description
Technical field
The present invention relates to be configured inside wheel and drive the wheel in-wheel motor drive unit and will wheel in it is electronic
The draft hitch of machine actuating device and vehicle body connection.
Background technique
As the connecting structure of in-wheel motor and suspension, in the past, there is known such as Japanese Unexamined Patent Publication 2017-165279 public affairs
It reports in (patent document 1) and People's Republic of China (PRC) patent application prospectus CN106926656A (patent document 2) and records
Structure.Connecting structure documented by patent document 1 and patent document 2, which has, is mounted on in-wheel motor and vertically side
To extension bracket, be configured at than in-wheel motor lower arm on the lower and the ball-and-socket joint for linking lower arm and bracket.
Ball-and-socket joint includes the bulb that can slidably link and pod；Stud in conjunction with bulb.Stud is fixed on lower arm
Vehicle width direction outboard end.Pod is fixed on pedestal lower end.The fixed structure of pod is recorded in patent document 2.
Fig. 8 is the perspective view for indicating the connecting state of previous in-wheel motor 7 and lower arm 6 described in Patent Document 2.?
The shell of in-wheel motor 7 is fixed with bracket 2.Fig. 9 is to amplify the fixed structure of pod previous documented by patent document 2
The cross-sectional view of expression, it is corresponding with the part that the circle of the single dotted broken line in Fig. 8 surrounds.As shown in figure 9, the ball stud of ball-and-socket joint
5 are fixed on the stud in such a way that bulb is located at upside, stud is located at downside the vehicle width direction outboard end of lower arm 6.
The pod of ball-and-socket joint is fixed on the lower end of bracket 2 using three bolts 8.Two in three bolts 8 are in fig. 8
It shows.A piece bolt 8 amplifies in Fig. 9 to be shown.The head of each bolt 8 is located at downside and axle portion extends upwards, the axle portion with
It is formed in the internal screw-thread screw of bracket 2.
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2017-165279 bulletin
Patent document 2: People's Republic of China's patent application prospectus CN106926656A paragraph 0015
But in above-mentioned previous such fixed structure, it is such to lead to the problem of following explanation.That is, bolt
Header arrangement in the mutually level position in bulb, the axle portion of bolt extends than head to upside.Therefore, it is necessary in than wheel
The position of motor 7 on the lower ensures the space of the up and down direction size Le from bulb center to bolt upper end.For electronic in taking turns
The inner space area for the wheel rim that machine 7 configures is narrow, but in above-mentioned previous fixed structure, when the space for occupying size Le
When, in-wheel motor 7 can only be set in remaining space, lead to not the configuration in the inner space area of wheel rim and need size
The restriction of in-wheel motor etc., in-wheel motor becomes larger.Therefore, it is desirable to the space saving of fixed structure.
In addition, in above-mentioned previous such fixed structure, as shown in figure 8, from the axes O of expression axle to ball-and-socket center
Distance Lf become larger, cause suspension performance to reduce.
In addition, in above-mentioned previous such fixed structure, as shown in figure 9, forming spiral shell in bracket 2 by tapping thread processing
Pit is simultaneously screwed into bolt 8.Therefore, it in the case where making 2 aluminium casting of bracket for the purpose of lightweight, may be unable to fully really
Protect the intensity of the thread of bracket 2.As the reason, worry to lead to thread defect, because of vehicle because of the stomata that bracket 2 is included
Maintenance and load and unload repeatedly thread caused by bolt 8 through when defect.Therefore, it is desirable to the intensity of fixed structure and durable
The raising of property.
In the case where defect of the quantity using thread to make up thread, the length of the threaded hole of bracket 2,
Cause the up and down direction size Le from ball-and-socket center to bolt upper end increasing.Then, in-wheel motor as described above
Diameter it is smaller and smaller, to export reduction, suspension performance is caused increasingly to reduce.
Summary of the invention
The present invention is made into view of the foregoing, and its purpose is to provide can seek space saving, improve suspension spy
The connecting structure of property, the in-wheel motor of intensity and durability and suspension.
Means for solving the problems
In order to realize the purpose, the connecting structure of in-wheel motor drive unit of the invention and draft hitch has: setting
In the bracket of in-wheel motor drive unit；The suspension member that can link with displacement with vehicle-body-side component；And it by bracket and hangs
The ball-and-socket joint of frame member connection.The ball-and-socket joint has stud, the ball set on the end of the stud vertically extended
Portion, the pod for being packed in the bulb.There is upper opening, lower opening, as general set on the bracket of in-wheel motor drive unit
The inner space of the lateral surface of the holding pod in the space that these upper openings are connect with lower opening is connect with inner space
Slit and the fixed mechanism that pod is fixed on to bracket by constriction slit.Also, stud is opened from upper opening and lower section
Prominent either in mouthful, the surface of shell of remaining another party and in-wheel motor drive unit faces.
According to such connecting structure of the invention, do not need to vertically extend as previous in bracket setting
Threaded hole.Therefore, compared with the past, the up and down direction size of bracket can be reduced and seek the space saving of connecting structure.Separately
Outside, the intensity of bond sites and durability improve.In addition, being capable of increasing the diameter of in-wheel motor drive unit and increasing defeated
Out.Alternatively, ball-and-socket center can be made to improve suspension performance close to axle.
The structure of fixed mechanism is not particularly limited.As a scheme of the invention, fixed mechanism, which includes, to be formed in across support
A pair of of bracket portion of the slit jaw pair of frame and the through-hole extended across with slit；Axle portion passes through through-hole and head is locked to one
To the bolt of a side of bracket portion；And another party set on a pair of of bracket portion and the internal screw thread that is screwed togather with the axle portion of bolt
Portion.According to the program, since spiral shell is arranged in a side of a pair of of the bracket portion faced in the horizontal direction across slit and another party
Bolt head and internal thread part, it is therefore, compared with the past, the up and down direction size of bracket can be reduced.Internal thread part is, for example, spiral shell
Mother, the nut are locked to another party of a pair of of bracket portion.
The configuration of through-hole is not particularly limited.As preferred scheme of the invention, through-hole runs through the inner space of bracket
Extend with the connecting portion of slit, is formed with recess portion in the lateral surface of pod, the axle portion of bolt engages with the recess portion of pod.Root
According to the program, it can prevent pod from deviating from from the upper opening and lower opening of inner space.
As long as suspension member is from draft hitch by spring lower component (wheel-side members) and spring upper-part (body side structure
Part) connection movable link, be not particularly limited.As another preferred scheme of the invention, suspension member is configuration
Downside in in-wheel motor drive unit and the lower arm that can swing in the up-down direction.According to the program, limited at bulb center
Determine in the draft hitch of steer axis, suspension performance improves.Alternatively, suspension member is arranged in in-wheel motor drive
The upside of dynamic device and the upper arm that can be swung in the up-down direction.
The material of bracket is not particularly limited.As a scheme of the invention, bracket is using aluminium as the casting system of principal component
Product.According to the program, the lightweight of bracket and cost effective can be sought.Alternatively, bracket can be the gold other than aluminium
Metal products, or it is also possible to forged article.
Invention effect
In this way, according to the present invention, compared with the past, the connecting structure of in-wheel motor drive unit and draft hitch can be real
Existing space saving, can increase the outer diameter of in-wheel motor drive unit, or bulb center can be made to improve suspension close to axle
Characteristic.In addition, the intensity and durability of connecting structure improve.In addition, it is possible to realize the lightweights of bracket and cost effective.
Detailed description of the invention
Fig. 1 is the expansion cross-sectional view for indicating in-wheel motor drive unit.
Fig. 2 is the connecting structure for indicating the in-wheel motor drive unit and draft hitch of one embodiment of the present invention
Schematic diagram.
Fig. 3 is the schematic diagram for indicating the suspension bracket of in-wheel motor drive unit.
Fig. 4 is the connecting structure for indicating the in-wheel motor drive unit and draft hitch of one embodiment of the present invention
Schematic diagram.
Fig. 5 is the longitudinal section view for indicating the connecting structure of the embodiment.
Fig. 6 is the sectional elevation for indicating the connecting structure of the embodiment.
Fig. 7 is the schematic diagram for indicating the connecting structure of in-wheel motor drive unit and draft hitch of comparative example.
Fig. 8 is the perspective view for indicating the connecting state of previous in-wheel motor and lower arm.
Fig. 9 is the cross-sectional view for indicating the pod fixed structure amplification of Fig. 8.
Description of symbols
10 in-wheel motor drive units, 11 hub spindle bearing portion, 17 suspension brackets, the upper end 17b, 7c up and down direction center
Portion, the lower end 17d, 17f lateral surface, 17g, 17j bracket portion, 17h through-hole (fixed mechanism), 21 motor parts, 24 stators, 29
Motor field frame, 39 main body shells, 41 pillars, 42 lower arms, 51 ball-and-socket joints, 52 studs, 53 bulbs, 54 pods, 56 inside are empty
Between, 58 slits, 59 bolts (fixed mechanism), 60 nuts (fixed mechanism), K steer axis, O axis (axle), W wheel rim (vehicle
Wheel).
Specific embodiment
Hereinafter, explaining embodiments of the present invention in detail with reference to the accompanying drawings.Fig. 1 indicates in-wheel motor drive unit
Cross-sectional view is unfolded.Fig. 2 is the connection knot for indicating the in-wheel motor drive unit and draft hitch of one embodiment of the present invention
The schematic diagram of structure is observed along axial direction, the inside of in-wheel motor drive unit is indicated with imaginary line.As shown in Figure 1, in wheel
Motor drive 10 has: the hub spindle bearing portion 11 set on the center of wheel；Drive the motor part 21 of wheel；It will be electronic
The reduction part 31 that the rotation in machine portion 21 is transmitted after slowing down to hub spindle bearing portion 11.Motor part 21 and reduction part 31 and hub bearing
The axes O in portion 11 offsettingly configures.Axes O is extended along the width of the car, consistent with axle.On the position of axes O direction, hub spindle
Bearing portion 11 is configured at the axis direction side (external disk side) of in-wheel motor drive unit 10, and motor part 21 is configured at electricity in wheel
The axis direction other side (inner disc side) of motivation driving device 10, reduction part 31 are configured at than motor part 21 by axis direction one
Side, the axis direction position of reduction part 31 and the axis direction position of hub spindle bearing portion 11 are Chong Die.
Wheel is made of the periphery fit a tyre (figure omits) of wheel rim W shown in Fig. 2.In-wheel motor drive unit 10
It is configured at the inner space area of wheel rim W.Hub spindle bearing portion 11 and reduction part 31 are contained in the inner space area of wheel rim W.
Motor part 21 is prominent from the inner space area of wheel rim W to the axis direction other side (inner disc side), but as change (not shown)
Shape example, motor part 21 can also be contained in the inner space area of wheel rim W.
Hub spindle bearing portion 11 is temperature of inner ring during rotation, fixed outer ring, includes the conduct rotation circle (wheel hub in conjunction with wheel rim W
Circle) inner ring 12；Coaxially it is configured at the outer ring 13 as retainer plate of the outside diameter of inner ring 12；It is configured at inner ring 12 and outer ring
Multiple rolling elements 14 of annulus between 13.
Outer ring 13 is mounted on the front portion 39f of the main body shell 39 of reduction part 31 by integrated structures such as bolts.
Front portion 39f is the housing wall portion for covering one side of axes O direction of the reduction part 31 in main body shell 39.
Motor part 21 has motor rotation axis 22, rotor 23, stator 24 and motor field frame 29, according to the sequence
It is configured in order from the axis M of motor part 21 to outside diameter.Motor part 21 is the radial clearance electricity of internal rotor, external stator form
Machine is also possible to the electrode of other forms.For example, although not shown, but motor part 21 is also possible to axial gap motor.It is electronic
The periphery of the encirclement stator 24 of casing body 29.The main body shell 39 of the direction axis M one side and reduction part 31 of motor field frame 29
Back portion 39b combine.Another side in the direction axis M of motor field frame 29 is close by the motor field frame outer cover 29v of plate
Envelope.Back portion 39b is the housing wall portion for covering another side in axes O direction of the reduction part 31 in main body shell 39.
Main body shell 39, motor field frame 29 and motor field frame outer cover 29v, which are constituted, becomes in-wheel motor driving dress
Set the shell of 10 gabarit, also referred to as shell.The shell is aluminum or aluminum alloy system.
The both ends of motor rotation axis 22 are rotatably freely supported on main body shell 39 by rolling bearing 27,28 respectively
Back portion 39b and motor part 21 motor field frame outer cover 29v.
Axis M as motor rotation axis 22 and the rotation center of rotor 23 is parallel with the axes O of hub spindle bearing portion 11
Ground extends.That is, motor part 21 is offsettingly configured in a manner of separating with the axes O of hub spindle bearing portion 11.For example, such as
Shown in Fig. 2, the axis M and axes O of motor part are offsettingly configured on vehicle front-rear direction, specifically come to say configuration than axis
Line O leans on the position of vehicle front.
As shown in Figure 1, reduction part 31 includes the input shaft coaxially combined with the motor rotation axis 22 of motor part 21
32；Coaxially set on the input gear 33 of the outer peripheral surface of input shaft 32；Multiple intermediate gears 34,36；With these intermediate gears 34,
The jackshaft 35 that 36 center combines；The output shaft 38 linked with the inner ring 12 of hub spindle bearing portion 11；Coaxially it is set to output shaft
The output gear 37 of 38 outer peripheral surface；Accommodate the main body shell 39 of these multiple gears and rotary shaft.Main body shell 39 is due to structure
At the gabarit of reduction part 31, therefore, also referred to as reduction part shell.
Input gear 33 is the helical gear of external tooth.Input shaft 32 is hollow structure, the axis direction of motor rotation axis 22
It (also includes saw that one side end 22e, which is inserted into the hollow hole 32h of input shaft 32 and it is chimeric to carry out spline in a manner of being unable to relative rotation,
Tooth is chimeric, same as below).Input shaft 32 is rotated freely in two end sides of input gear 33 by rolling bearing 32a, 32b respectively
Ground is supported on the front portion 39f and back portion 39b of main body shell 39.
The axis N of the rotation center of jackshaft 35 as reduction part 31 is extended parallel to axes O.The two of jackshaft 35
End is rotatably freely supported on the front portion 39f and back portion 39b of main body shell 39 by rolling bearing 35a, 35b.?
The direction the axis N end side of jackshaft 35 is coaxially equipped with the first intermediate gear 34.In the direction axis N of jackshaft 35
Centre region is coaxially equipped with the second intermediate gear 36.
First intermediate gear 34 and the second intermediate gear 36 are the helical gears of external tooth, and the diameter of the first intermediate gear 34 is greater than
The diameter of second intermediate gear 36.First intermediate gear 34 of major diameter is configured at more another by the direction axis N than the second intermediate gear 36
The position of side, and engaged with the input gear of path 33.Second intermediate gear 36 of path is configured at than the first intermediate gear
34 lean on the position of the direction axis N side, and engage with the output gear of major diameter 37.
As shown in Fig. 2, the axis N of jackshaft 35 is configured at the position more against the top than axes O and axis M.In addition, jackshaft
35 axis N is configured at the position that rear of vehicle is leaned on than axes O by vehicle front and than axis M.Reduction part 31 is that have in vehicle
The parallel-axes gears of three axis of the axes O, N, M that configure and extend parallel to each other at spaced intervals on front-rear direction slows down
Machine is slowed down with two-stage.It should be noted that reduction part 31 is also possible to have in multiple as variation (not shown)
Between axis multistage parallel-axes gears speed reducer.
It returns to Fig. 1 to be illustrated, output gear 37 is the helical gear of external tooth, coaxially in the axes O of output shaft 38
Centre portion.Output shaft 38 extends along axes O.One side end of axes O direction of output shaft 38 is inserted into the centre bore of inner ring 12 and is fitted into
To be unable to relative rotation.The axes O direction central portion of output shaft 38 leans on outer diameter in the axes O direction end side than inner ring 12
The position of side is rotatably freely supported on the front portion 39f of main body shell 39 by rolling bearing 38a.The axis of output shaft 38
The direction O end side is rotatably freely supported on the back portion 39b of main body shell 39 by rolling bearing 38b.
As shown in Figure 1, reduction part 31 passes through the engaging of the driving gear of path and the driven gear of major diameter, i.e. input gear
33 with engaging for the first intermediate gear 34 and engaging the rotation of input shaft 32 for the second intermediate gear 36 and output gear 37
It is transmitted after deceleration to output shaft 38.Rotating element from the input shaft 32 of reduction part 31 to output shaft 38 is constituted motor part 21
The driving transmission path that is transmitted to the inner ring 12 of hub spindle bearing portion 11 of rotation.
Main body shell 39 further includes barrel other than above explained front portion 39f and back portion 39b.It should
Barrel covers the internal part of reduction part 31 in a manner of surrounding the axes O extended parallel to each other, N, M.Plate is just
Face part 39f covers the internal part of reduction part 31 from axis direction side, and in conjunction with a square end of barrel.Plate
Back portion 39b covers the inside component of reduction part 31 from the axis direction other side, and in conjunction with another square end of barrel.
The back portion 39b of main body shell 39 is also that the inner space of reduction part 31 and electronic is combined, be separated out with motor field frame 29
The next door of the inner space in machine portion 21.Motor field frame 29 is supported on main body shell 39, another from main body shell 39 to axis direction
Side is prominent.
Main body shell 39 marks off the inner space of reduction part 31, by all rotating element (rotary shafts of reduction part 31
And gear) it is contained in inner space.As shown in Fig. 2, the lower part of main body shell 39 becomes oil storage unit 39t.The height of oil storage unit 39t
Position is Chong Die with the height and position of the lower part of motor part 21.In the oil storage unit of the lower part for the inner space for occupying main body shell 39
39t stores the lubricating oil for being lubricated to motor part 21 and reduction part 31.
Input shaft 32, jackshaft 35 and output shaft 38 are by above-mentioned rolling bearing by two supports.These rolling bearings
32a, 35a, 38a, 32b, 35b, 38b are transverse bearings.
When being supplied electric power from the outside of in-wheel motor drive unit 10 to motor part 21, the rotor of motor part 21
23 rotations, rotation is exported from motor rotation axis 22 to reduction part 31.Reduction part 31 will be defeated from motor part 21 to input shaft 32
The rotation entered is slowed down, and will be exported from output shaft 38 to hub spindle bearing portion 11.The inner ring 12 of hub spindle bearing portion 11 with output shaft 38
Identical revolving speed rotation, drives the wheel rim W for being mounted on inner ring 12.
Fig. 3 is the schematic diagram for indicating for in-wheel motor drive unit to be installed on the suspension bracket of draft hitch, indicates edge
The state of vehicle front-rear direction observation.Suspension bracket 17 is fixed in the outside wall surface of main body shell 39.Referring to Fig. 2, before vehicle
In rear direction, suspension bracket 17 is configured at the side opposite with motor part 21, specifically offsettingly configures to rear of vehicle.
As shown in figure 3, suspension bracket 17 vertically extends.The upper end 17b of suspension bracket 17 is configured at than slowing down
The position square in vehicle width direction of portion 31, it is prominent from the inner space area of wheel rim W.In addition, upper end 17b is configured at than electronic
The position of rear of vehicle is leaned in machine portion 21.In addition, although upper end 17b is configured at the top of in-wheel motor drive unit 10, but
For the position lower than the top of reduction part 31.Upper end 17b is fixed on the lower end of pillar 41 by fixed mechanisms such as bolts 18.
Load is carried in order to reduce the non-spring of draft hitch, suspension bracket 17 is preferably aluminum products or other light metal systems
Product.In addition, suspension bracket 17 or aluminium casting.
Pillar 41 is the suspension member vertically extended, specifically the damping mechanisms such as combination of dampings device and spiral
Attenuator made of the elastic mechanisms such as spring.From suspension member, it is installed on the in-wheel motor drive unit of spring lower component
10 in the up-down direction bounce and rebound when, pillar 41 stretches in the up-down direction, makes the bullet of in-wheel motor drive unit 10
It jumps and rebound decays.
Tie rod arm 19 is equipped in the up and down direction central portion 17c of suspension bracket 17.Tie rod arm 19 is from suspension bracket 17 to vehicle
Front-rear direction is prominent.The pull rod of the front end of tie rod arm 19 and transfer (not shown) links.
The lower end 17d of suspension bracket 17 is configured at the position than reduction part 31 on the lower, and the inside for being contained in wheel rim W is empty
Between region.Referring to Fig. 2, up and down direction clearance G is constituted between lower end 17d and main body shell 39.In addition, lower end 17d
Height and position is Chong Die with the height and position of oil storage unit 39t.Lower end 17d links by ball-and-socket joint 51 and lower arm 42.By ball-and-socket
The straight line that the center in the bulb 53 of connector 51 and the upper end of pillar 41 link constitutes steer axis K.In-wheel motor drive unit
10 can turn to together with wheel W around steer axis K.The center in bulb 53 is also referred to as hard spot.
Lower arm 42 is arranged in be prolonged on the lower and along vehicle width direction than in-wheel motor drive unit 10 and suspension bracket 17
The suspension member stretched has vehicle width direction inner end 43,44 and vehicle width direction outboard end 45.It borrows vehicle width direction inner end 43,44
Pivot and vehicle-body-side component (not shown) is helped to link.Vehicle width direction outboard end 45 is configured at the underface of lower end 17d, with ball-and-socket
The stud 52 of connector 51 combines.It should be noted that indicating lower arm 42 with line chart simplification in Fig. 2.
Lower arm 42 can be cardinal extremity with vehicle width direction inner end 43,44, take vehicle width direction outboard end 45 as free end and upper
Lower section is swung up.As a result, from suspension member, the in-wheel motor drive unit 10 for being installed on spring lower component can be upper and lower
It bounces and rebounds on direction.
Lower arm 42 and pillar 41 constitute draft hitch.It is column support type draft hitch in the present embodiment.It needs to illustrate
It is that vehicle-body-side component refers to the component that body side is installed on from the component being illustrated.
In the following, explaining the connecting structure of suspension bracket 17 Yu lower arm 42 in detail.
Fig. 4 is the connecting structure for indicating the in-wheel motor drive unit and draft hitch of one embodiment of the present invention
Schematic diagram is the figure for indicating 51 periphery of the ball-and-socket joint amplification of Fig. 2.Fig. 5 be indicate the embodiment connecting structure it is vertical
Cross-sectional view is the figure for indicating 51 periphery of the ball-and-socket joint amplification of Fig. 2.Fig. 6 is the cross for indicating the connecting structure of the embodiment
Cross-sectional view, the section that expression is obtained with Fig. 4 and the A-A plane cutting shown in fig. 5 embodiment.Ball-and-socket joint 51 has along upper
The stud 52 of lower direction extension, the bulb 53 set on the end of stud 52, the pod 54 with the connection of bulb 53.
The stud 52 of present embodiment vertically extends, and links in upper end and bulb 53.Stud 52 and bulb 53 are
One component, therefore also referred to as ball stud.The lower end of stud 52 is formed through the vehicle width direction outboard end 45 in lower arm 42
And the through hole vertically extended, and it is prominent from the downward side of vehicle width direction outboard end 45.It is formed in the periphery of the protruding portion
There is external screw thread, is screwed togather with nut 55.Stud 52 is fixed on vehicle width direction outboard end 45 using fixed mechanisms such as nuts 55.It is preferred that
The sandwiched washer 61 between nut 55 and the lower surface of lower end 17d.
Pod 54 has the spherical recess portion 54q for being packed in bulb 53 at center.Spherical recess portion 54q is in the lower surface of pod 54
With opening.The internal diameter of the opening of spherical recess portion 54q is less than the outer diameter in bulb 53.Therefore, bulb 53 will not be from spherical recess portion 54q
Abjection.Open Side Down that side is prominent from spherical recess portion 54q for stud 52.Bulb 53 can be slided in pod 54, from pod 54,
The posture of stud 52 infinitely changes in all directions.
The lower end 17d of suspension bracket 17 marks off inner space 56.Inner space 56 is through lower end 17d and along upper
The circular hole that lower direction extends.Therefore, inner space 56 include upper opening 56b, lower opening 56c, be by upper opening 56b with
The space of lower opening 56c connection.Inner space 56 accommodates pod 54.Mark off the inside of the lower end 17d of inner space 56
The outside face contact in face and pod 54.The contact can be loose chimeric, or be also possible to be pressed into.As shown in fig. 6, internal
The medial surface in space 56 and the lateral surface of pod 54 are circular sections.It should be noted that referring to Fig. 4 and Fig. 5, inner space 56
Medial surface be barrel surface.As variation (not shown), the medial surface of inner space 56 is also possible to circular conical surface.Stud 52 from
Lower opening 56c is prominent.Upper opening 56b and the surface of the main body shell 39 of 10 lower part of in-wheel motor drive unit face
(Fig. 2).
As shown in Fig. 2, the upper surface of lower end 17d and being contained in the pod 54 of inner space 56 across up and down direction gap
The lower surface of G and in-wheel motor drive unit 10 face.The surface of lower surface specifically main body shell 39.By
This, can ensure that the clearance of up and down direction clearance G between lower end 17d and main body shell 39.
Protrusion 54p is formed in the lower part of pod 54.Protrusion 54p is, for example, small flange, is formed as the following table with pod 54
Face is coplanar.The following table face contact of protrusion 54p and lower end 17d.The limitation of pod 54 inner space 56 is deviate from upwards as a result,.
Lower end 17d is configured at spaced intervals in the up-down direction with vehicle width direction outboard end 45, is set up between them
There is stud 52.Stud 52 is surrounded between lower end 17d and vehicle width direction outboard end 45 by the rubber sleeve 57 of snake abdomen shape.Rubber sleeve
57 one end is connect with the lower surface of pod 54, and bulb 53 is sealed.The other end and vehicle width direction outboard end 45 of rubber sleeve 57
Connection, stud 52 is sealed.Bulb 53 and stud 52 are protected from as a result, is influenced by external foreign matter.
As shown in fig. 6, being formed with slit 58 in lower end 17d.Slit 58 be by the lateral surface 17f of lower end 17d with it is interior
Gap that portion space 56 connects, opening up on (vehicle front-rear direction) in the horizontal direction.Lower end 17d includes across 58 face of slit
Pair a pair of of bracket portion 17g, 17j.
Through-hole 17h is formed in a pair of of bracket portion 17g, 17j.Through-hole 17h is from the bracket portion 17g of a side to another
The bracket portion 17j through hole that (vehicle front-rear direction) extends as the crow flies in the horizontal direction of side, intersects with slit 58.Through-hole
17h is configured at the up and down direction middle section of lower end 17d.Passing through in through-hole 17h has bolt 59.
Bolt 59 extends across with slit 58.The head of bolt 59 is locked to the lateral surface of the bracket portion 17g of a side.
The lateral surface of the axle portion of bolt 59 from the bracket portion 17j of another party are prominent.In the bracket portion 17j spiral shell outstanding from another party
The front end of bolt 59 is screwed with nut 60.
Through-hole 17h, bolt 59 and nut 60 are the fixed mechanisms for pod 54 to be fixed on to suspension bracket 17.When by spiral shell
When bolt 59 and nut 60 fasten, 58 constriction of slit, the medial surface for marking off the lower end 17d of inner space 56 will be outside pod 54
Side braces.Pod 54 is fixed on lower end 17d as a result,.
Through-hole 17h extends through slit 58 with the connecting portion of inner space 56.Therefore, through-hole 17h and slit 58 and
This both sides of inner space 56 connection.It should be noted that as variation (not shown), through-hole 17h be also possible to only with slit
The through hole of 58 connections.
The circumferential slot 54g extended along complete cycle is formed in the lateral surface of pod 54.Circumferential slot 54g is cuing open for semi-circular shape
The axle portion in face, bolt 59 engages with circumferential slot 54g.As variation (not shown), circumferential slot 54g, which is also possible to only be formed in, to be held
The recess portion of circumferential a part of nest 54.
Referring to Fig. 2, according to the present embodiment, stud 52 is configured far for ball stud with the posture vertically extended
Axes O (axle) from in-wheel motor drive unit 10, bulb 53 is close to axes O.Also, the pod 54 in bulb 53 will be packed in
It is fixed on the suspension bracket 17 of in-wheel motor drive unit 10, stud 52 is fixed on to the lower arm 42 of draft hitch.Moreover, outstanding
The fixation of frame torr frame 17 and pod 54 braces pod 54 by constriction slit 58 in the horizontal direction to realize.Suspension as a result,
Bracket 17 and the fixed mechanism of pod 54 are enough using the up and down direction size of pod 54, will not be from bulb 53 in the up-down direction
It is prominent.Therefore, the center in bulb 53 can be made close to axes O.
The size Lr of lower surface in Fig. 2, from the axes O of present embodiment to main body shell 39, up and down direction
The gap width Lg of gap G, from the upper surface of lower end 17d to the size Ld at the center in bulb 53,53 from axes O to bulb in
The distance Lb of the heart is indicated with formula 1 below.
[formula 1]
Lr+Lg+Ld=Lb
Fig. 7 is the schematic diagram for indicating the connecting structure of in-wheel motor drive unit and draft hitch of comparative example, with Fig. 2
Similarly indicate the state observed along axial direction.About comparative example, phase is marked to the common structure of embodiment above-mentioned
With appended drawing reference and omit the description, it is described below to different structures.
In the comparative example of Fig. 7, instead of above-mentioned slit 58, and flange 54f is formed in pod 54.Flange 54f is that have
The annular plate of the thickness of up and down direction.In flange 54f, formed at spaced intervals in the circumferential along the perforative hole in plate thickness direction.Separately
Outside, multiple threaded hole 17n extended upwards are worn in the lower surface of lower end 17d.The configuration of threaded hole 17n and flange 54f
Through hole it is corresponding.Also, bolt 54b runs through the through hole of flange 54f and screws togather with threaded hole 17n.Pod 54 is fixed as a result,
In lower end 17d.
The up and down direction size of lower end 17d is greater than the length of threaded hole 17n.Pod 54 is dashed forward downwards from lower end 17d
Out.The bolt head of bolt 54b protrudes downwards from flange 54f.
In the comparative example of Fig. 7, the size Lr of 39 lower surface, up and down direction clearance G from axes O to main body shell
Gap width Lg, from the upper surface of lower end 17d to the size Le at the center in bulb 53,53 center from axes O to bulb
Distance Lf is indicated with formula 2 below.
[formula 2]
Lr+Lg+Le=Lf
In the front end of bolt 54b not in the situation outstanding of the upper surface of lower end 17d, from the upper surface of lower end 17d
Size Le to the center in bulb 53 is the plate of up and down direction size from the upper surface of lower end 17d to lower surface, flange 54f
Thick size and the sum of the distance from the lower surface of flange 54f to 53 center of bulb.Alternatively, in the front end of bolt 54b from lower end
In the situation outstanding of the upper surface of 17d, size Le is the up and down direction from the front end of bolt 54b to the lower surface of lower end 17d
Size, the plate thickness size of flange 54f and the sum of the distance from the lower surface of flange 54f to 53 center of bulb.Under flange 54f
The distance at surface to 53 center of bulb is greater than the length dimension on the head of bolt 54b or the length dimension with the head of bolt 54b
It is identical.That is, size Le is more than or equal to the overall length of bolt 54b.
Formula 1 and formula 2 are compared, Lb < Lf.It is due to Ld < Le as the reason.Ld with from the upper of lower end 17d
Surface to lower surface up and down direction size identical or less than the up and down direction ruler from the upper surface of lower end 17d to lower surface
It is very little.
Such as Fig. 2, so, the in-wheel motor drive unit of present embodiment and the connecting structure of draft hitch have: being set to
The suspension bracket 17 of in-wheel motor drive unit 10；The lower arm 42 that can link with displacement with vehicle-body-side component；By suspension bracket
17 ball-and-socket joints 51 linked with lower arm 42.As shown in figure 4, ball-and-socket joint 51 has the stud 52 vertically extended, sets
In the bulb 53 of the end of stud 52, via the pod 54 of the spherical recess portion 54q for being packed in bulb 53 and the connection of bulb 53.Suspension support
The lower end 17d of frame 17 has upper opening 56b, lower opening 56c, the sky for connecting upper opening 56b with lower opening 56c
Between and the inner space of lateral surface to keep pod 54, the slit 58 (Fig. 6) that connect with the inner space and pass through constriction
Slit 58 and the bolt 59 and nut 60 that pod 54 is fixed on to suspension bracket 17.The 56c that is open from below of stud 52 is prominent, top
Opening 56b and the surface of the main body shell 39 of in-wheel motor drive unit 10 face.Pod 54 is not prominent from upper opening 56b
Out.Therefore, up and down direction clearance G can ensure that the clearance of size Lg.
It can be sought as a result, by reducing the size Ld from the upper surface of lower end 17d to 53 center of bulb referring to Fig. 2
The space saving of this connecting structure.In addition, it is not necessary that implementing tapping thread processing to lower end 17d as previous fixed mechanism
Thread is set, so that 17 aluminium casting of suspension bracket is sought cost effective and lightweight.In addition, output shaft can be made
37 major diameter of gear and the torque for increasing wheel.Alternatively, the distance Lb that can reduce 53 centers from axes O to bulb is outstanding to improve
Frame characteristic.
In addition, having the fixed mechanism that the pod 54 of present embodiment is fixed on lower end 17d with slit 58 across
The through-hole 17h of extension, axle portion pass through through-hole 17h and by head be locked to a side bracket portion 17g bolt 59 and with it is another
The nut 60 that the bracket portion 17j of one side is configured adjacently and screws togather with the axle portion of bolt 59.It is not needed as a result, by the head of bolt 59
Portion and nut 60 are configured at the upper surface of lower end 17d, it can be ensured that up and down direction clearance G.
In addition, the through-hole 17h inleakage space 56 of present embodiment extends with the connecting portion of slit 58, in pod
54 lateral surface is formed with circumferential slot 54g, and the axle portion of bolt 59 engages with circumferential slot 54g.As a result, pod 54 be prevented from abjection and
It will not deviate from from inner space 56.
More than, embodiments of the present invention are illustrated referring to attached drawing, but the present invention do not limit to it is shown in the drawings
Embodiment.For embodiment shown in the drawings, with same range or equivalency range of the invention in, can add various
Modification or deformation.For example, it is also possible to extract a part of structure out from an above-mentioned embodiment, from above-mentioned another embodiment party
It extracts the structure of another part in formula out, combine the structure of these extractions.
Industrial applicibility
The present invention is used advantageously in electric car and hybrid electric vehicle.
Claims (5)
1. the connecting structure of a kind of in-wheel motor drive unit and draft hitch, has:
Set on the bracket of in-wheel motor drive unit；
The suspension member that can link with displacement with vehicle-body-side component；And
The ball-and-socket joint that the bracket and the suspension member are linked,
The ball-and-socket joint have the stud vertically extended, set on the end of the stud bulb and be packed in described
The pod in bulb,
The bracket has upper opening, lower opening, as the space for connecting the upper opening with the lower opening
The inner space of lateral surface of the holding pod, the slit that is connect with the inner space and by by the slit
Constriction and the fixed mechanism that the pod is fixed on to the bracket,
Stud is prominent either from the upper opening and the lower opening, remaining another party with it is electronic in the wheel
The surface of shell of machine actuating device faces.
2. the connecting structure of in-wheel motor drive unit according to claim 1 and draft hitch, wherein
The fixed mechanism includes a pair of of the bracket portion being formed in across the slit jaw pair and prolongs across with the slit
The through-hole stretched；Axle portion is across the through-hole and head is locked to the bolt of a side of the pair of bracket portion；And it is set to institute
The internal thread part stating another party of a pair of of bracket portion and being screwed togather with the axle portion of the bolt.
3. the connecting structure of in-wheel motor drive unit according to claim 2 and draft hitch, wherein
The through-hole extends through the inner space with the connecting portion of the slit,
It is formed with recess portion in the lateral surface of the pod,
The axle portion of the bolt engages with the recess portion.
4. the connecting structure of in-wheel motor drive unit described in any one of claim 1 to 3 and draft hitch,
In,
The suspension member is arranged in the downside of the in-wheel motor drive unit and can swing down in the up-down direction
Arm.
5. the connecting structure of in-wheel motor drive unit described in any one of claim 1 to 3 and draft hitch,
In,
The bracket is using aluminium as the cast product of principal component.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018065308A JP7182890B2 (en) | 2018-03-29 | 2018-03-29 | Connection structure of in-wheel motor drive device and suspension device |
| JP2018-065308 | 2018-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110315959A true CN110315959A (en) | 2019-10-11 |
Family
ID=68061661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810351658.5A Pending CN110315959A (en) | 2018-03-29 | 2018-04-18 | The connecting structure of in-wheel motor drive unit and draft hitch |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7182890B2 (en) |
| CN (1) | CN110315959A (en) |
| WO (1) | WO2019189120A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11529864B2 (en) | 2019-11-29 | 2022-12-20 | Mitsubishi Heavy Industries, Ltd. | Drive device for electric vehicle and electric vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0375329A (en) * | 1989-07-10 | 1991-03-29 | Hitachi Metals Ltd | Aluminum alloy and method for its casting |
| JP2007106190A (en) * | 2005-10-12 | 2007-04-26 | Fuji Heavy Ind Ltd | Ball joint and stabilizer device for vehicle |
| JP2007230507A (en) * | 2006-03-03 | 2007-09-13 | Honda Motor Co Ltd | Suspension system of vehicle, and ball stud used for suspension system |
| JP2008075682A (en) * | 2006-09-19 | 2008-04-03 | Toyota Motor Corp | Bearing sheet of ball joint, and ball joint |
| CN105460077A (en) * | 2014-09-26 | 2016-04-06 | 富士重工业株式会社 | Coupling structure for vehicle chassis members |
| JP2017165279A (en) * | 2016-03-16 | 2017-09-21 | Ntn株式会社 | Connection structure of in-wheel motor drive device and suspension device |
-
2018
- 2018-03-29 JP JP2018065308A patent/JP7182890B2/en active Active
- 2018-04-18 CN CN201810351658.5A patent/CN110315959A/en active Pending
-
2019
- 2019-03-26 WO PCT/JP2019/012765 patent/WO2019189120A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0375329A (en) * | 1989-07-10 | 1991-03-29 | Hitachi Metals Ltd | Aluminum alloy and method for its casting |
| JP2007106190A (en) * | 2005-10-12 | 2007-04-26 | Fuji Heavy Ind Ltd | Ball joint and stabilizer device for vehicle |
| JP2007230507A (en) * | 2006-03-03 | 2007-09-13 | Honda Motor Co Ltd | Suspension system of vehicle, and ball stud used for suspension system |
| JP2008075682A (en) * | 2006-09-19 | 2008-04-03 | Toyota Motor Corp | Bearing sheet of ball joint, and ball joint |
| CN105460077A (en) * | 2014-09-26 | 2016-04-06 | 富士重工业株式会社 | Coupling structure for vehicle chassis members |
| JP2016068602A (en) * | 2014-09-26 | 2016-05-09 | 富士重工業株式会社 | Connection structure of undercarriage member of vehicle |
| 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 |
|---|---|
| JP7182890B2 (en) | 2022-12-05 |
| WO2019189120A1 (en) | 2019-10-03 |
| JP2019172194A (en) | 2019-10-10 |
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