CN109505956A - Driving device - Google Patents

Driving device Download PDF

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Publication number
CN109505956A
CN109505956A CN201810960597.2A CN201810960597A CN109505956A CN 109505956 A CN109505956 A CN 109505956A CN 201810960597 A CN201810960597 A CN 201810960597A CN 109505956 A CN109505956 A CN 109505956A
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CN
China
Prior art keywords
bearing
driving device
output section
axial
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201810960597.2A
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Chinese (zh)
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CN109505956B (en
Inventor
竹本心路
水池宏友
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Corp
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Nidec Corp
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Filing date
Publication date
Priority claimed from JP2018058832A external-priority patent/JP7102842B2/en
Application filed by Nidec Corp filed Critical Nidec Corp
Publication of CN109505956A publication Critical patent/CN109505956A/en
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Publication of CN109505956B publication Critical patent/CN109505956B/en
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Classifications

    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The present invention provides a kind of driving device.Driving device rotates the wheel, and has motor part, deceleration mechanism, output section, first bearing and second bearing.Motor part has the motor drive shaft configured along central axis.The connection of the axial side of deceleration mechanism and motor drive shaft.Output section is located at the axial side of motor part, and the rotation of motor drive shaft is transmitted to output section by deceleration mechanism.First bearing and second bearing can rotate output section bearing around central axis.Motor part includes the rotor with motor drive shaft；The stator opposite with rotor across gap radially；And accommodate the casing of rotor and stator.Casing has fixed part in the axial other side, which is fixed on the chassis of the driving body equipped with driving device.First bearing supports the part of the axial side of output section.Second bearing supports the part of the axial other side of output section.

Description

Driving device
Technical field
The present invention relates to driving devices.
Background technique
It has been known that there is the driving devices rotated the wheel.For example, in Japanese Kokai 2000-52788 bulletin, as this The driving device of sample records the driving mechanism with electric motor and deceleration mechanism.
In such as above-mentioned driving device, wheel cantilever is installed on output shaft.Therefore, it is easy to compare output shaft application from wheel Big load.There is output shaft inclination as a result, and is easy the bearing supported to output shaft and the gear of deceleration mechanism The case where generating loss.
Summary of the invention
In view of the foregoing, the first purpose is to provide a kind of to be supported output section with being able to suppress the present invention Bearing and the gear of deceleration mechanism generate the driving device of the structure of loss.
The driving device of illustrative embodiment of the invention rotates the wheel, and has motor part, deceleration mechanism, output Portion, first bearing and second bearing.The motor part has the motor drive shaft configured along central axis.The deceleration mechanism and institute State the axial side connection of motor drive shaft.The output section is located at the axial side of the motor part, and the rotation of the motor drive shaft is borrowed The deceleration mechanism is helped to be transmitted to the output section.The first bearing and the second bearing support the output section for energy It is enough to be rotated around the central axis.The motor part includes rotor, and the rotor has the motor drive shaft；Stator, the stator It is opposite with the rotor across gap radially；And casing, the casing accommodate the rotor and stator.The machine Shell has fixed part in the axial other side, and the fixed part is fixed on the chassis of the driving body equipped with the driving device.Institute First bearing is stated to support the part of the axial side of the output section.Axial direction of the second bearing to the output section The part of the other side is supported.
Illustrative embodiment according to the present invention, is able to suppress the axis supported in driving device to output section It holds and the gear of deceleration mechanism generates loss.
There is the detailed description of the preferred embodiment for the present invention below, referring to attached drawing, can be more clearly understood that the present invention Above-mentioned and other feature, element, step, features and advantages.
Detailed description of the invention
Fig. 1 is the perspective view for showing the driving device of present embodiment.
Fig. 2 is the cross-sectional view for showing the driving device of present embodiment, is the II-II cross-sectional view in Fig. 1.
Fig. 3 is the cross-sectional view for showing a part of driving device of present embodiment, is the partial enlarged view in Fig. 2.
Fig. 4 is the partial sectional perspective for showing a part of driving device of present embodiment.
Fig. 5 is the cross-sectional view for showing a part of driving device of present embodiment, is the V-V cross-sectional view in Fig. 2.
Fig. 6 is the perspective view for showing a part of driving device of present embodiment.
Fig. 7 is the figure for being observed from the right a part of driving device of present embodiment.
Fig. 8 is the cross-sectional view for showing a part of driving device of present embodiment.
Fig. 9 is the perspective view for showing a part of cover member of present embodiment.
Figure 10 is the perspective view for showing a part of driving device of present embodiment.
Figure 11 is the perspective view of the circuit board for showing present embodiment, rotation sensor and connector.
Figure 12 is the perspective view for showing a part of wheel carrier of present embodiment.
Figure 13 is the cross-sectional view for being shown as the driving device of other an examples of present embodiment.
Specific embodiment
The Z-direction suitably shown in each figure is vertical direction.X-direction and Y direction are vertical with Z-direction Horizontal direction, be mutually orthogonal direction.In the present embodiment, X-direction is the driving dress equipped with present embodiment Set the left and right directions of 10 driving body.In the present embodiment, Y direction is the driving device 10 equipped with present embodiment The front-rear direction of driving body.
The central axis J suitably shown in each figure is extended along the direction parallel with the X-direction as left and right directions Imaginary line.In the following description, the direction parallel with the axial direction of central axis J is referred to as " axial X ", it will be in axial X Positive side is referred to as " right side ", and the negative side in axial X is referred to as " left side ".Also, the radial direction centered on central axis J is referred to as Circumferential direction centered on central axis J is referred to as " circumferential direction " by " radial direction ".Also, it will be put down with the Z-direction as vertical direction Capable direction is referred to as " vertical direction Z ".Also, the positive side in vertical direction Z is referred to as " upside ", it will be negative in vertical direction Z Side is referred to as " downside ".
In the present embodiment, right side is equivalent to axial side, and left side is equivalent to the axial other side.In addition, vertical direction, Upside, downside, horizontal direction and left and right directions are only intended to illustrate the title of the relative positional relationship in each portion, actual configuration Relationship etc. is also possible to the configuration relation etc. other than configuration relation indicated with these titles etc..
The driving device 10 of Fig. 1 to present embodiment shown in Fig. 3 is the driving device rotated the wheel.In present embodiment In, driving device 10 is equipped on the driving body with wheel (not shown).Driving device 10 is fixed on the chassis of driving body.Save sketch map Show, the chassis of driving body is located at the left side of driving device 10.
As shown in FIG. 2 and 3, the driving device 10 of present embodiment includes with the motor configured along central axis J The motor part 11 of axis 31, planetary gear mechanism 50, output section 60, first bearing 73, second bearing 74, the first seal member 75 with And second seal member 76.Planetary gear mechanism 50 is the deceleration mechanism connecting with the right side of motor drive shaft 31.Output section 60 is located at The right side of motor part 11.The rotation of motor drive shaft 31 is transmitted to output section 60 by planetary gear mechanism 50.First bearing 73 and Second bearing 74 can rotate the bearing of output section 60 around central axis J.First bearing 73 and second bearing 74 are, for example, Ball bearing.
As shown in Fig. 2, motor part 11 is with casing 20, bushing 28, rubber cover 29, the rotor 30 with motor drive shaft 31, One motor bearing 71, the second motor bearing 72, stator 40, circuit board 80, rotation sensor 86, connector 81 and cable 83.
Casing 20 accommodates rotor 30 and stator 40.In the present embodiment, the inside of casing 20 is for example closed.Casing 20 have cover member 21 and bracket 22.Cover member 21 is fixed on the left side of bracket 22.Cover member 21 has cover bottom 21a, cover cylinder Portion 21b, fitting cylinder section 21c, the first fixed part 21d, prominent canister portion 23 and bearing cage 24.That is, casing 20 has cover bottom Portion 21a, cover canister portion 21b, fitting cylinder section 21c, the first fixed part 21d, prominent canister portion 23 and bearing cage 24.
Bottom 21a is covered in the annulus plate for surrounding central axis J.The plate face of bottom 21a is covered towards axial X.Cover bottom 21a Cover the left side of stator 40.Cover canister portion 21b is in from the outer radial periphery edge of cover bottom 21a tubular outstanding to the right.Chimeric cylinder Portion 21c is in from the end face on the right side of cover canister portion 21b tubular outstanding to the right.In the present embodiment, fitting cylinder section 21c be in Cylindrical shape centered on central axis J.
First fixed part 21d is affixed to the part on the chassis of the driving body equipped with driving device 10.First fixed part 21d is for example fixed on the chassis of driving body using screw.As shown in Figure 1, the first fixed part 21d is outside to diameter from cover canister portion 21b Side is prominent.In the present embodiment, the first fixed part 21d is provided with multiple.Multiple first fixed part 21d are in circumferential complete cycle It configures at equal intervals.In the present embodiment, the circumferential size of the first fixed part 21d becomes smaller with towards radial outside.Such as Fig. 2 Shown, in the present embodiment, the axial X dimension of the first fixed part 21d is roughly the same with the axial X dimension of cover canister portion 21b.
In the present embodiment, the first fixed part 21d is set to the cover portion positioned at left side in cover member 21 and bracket 22 Part 21.In the present embodiment, casing 20 has the first fixed part 21d in left side.First fixed part 21d is located at than the second motor At the position of bearing 72 on the right side.
Prominent canister portion 23 is the part outstanding to the left in casing 20.Prominent canister portion 23 has canister portion main body 23a and bottom Portion 23b.Canister portion main body 23a is from the radially inner circumference edge of cover bottom 21a tubular outstanding to the left.Canister portion main body 23a's The end in left side of the inside inserted with motor drive shaft 31.The aftermentioned rotor master of ratio in the covering motor drive shaft 31 of canister portion 23 is protruded as a result, At least part of body 32 by the part in left side.
As shown in Figure 4 and 5, in the present embodiment, canister portion main body 23a be in centered on central axis J substantially It is cylindric.Canister portion main body 23a has to radial outside protrusion 23d outstanding.In the present embodiment, the downward pleurapophysis of protrusion 23d Out.When along axial direction X observation, protrusion 23d is in substantially rectangular shape.
As shown in figure 5, protrusion 23d has the extraction of the wall portion of the downside of the vertical direction Z perforation protrusion 23d in radially Hole portion 23c.That is, prominent canister portion 23 has the extraction hole portion 23c for the wall portion for radially penetrating through prominent canister portion 23.Bushing 28 is embedded in It draws in hole portion 23c.
The opening of the downside in the opening i.e. present embodiment of the radial outside of hole portion 23c is drawn in the closing of bushing 28.Bushing 28 have liner body portion 28a and flange of bush portion 28b.Liner body portion 28a is to be embedded in the part drawn in hole portion 23c. Flange of bush portion 28b is from the end of the downside of liner body portion 28a to the Directional Extension vertical with vertical direction Z.The flange of bush Portion 28b is contacted with the peripheral part of the extraction hole portion 23c in the end face of the downside of protrusion 23d.Bushing 28 has radially perforation lining Multiple bushing through hole 28c of set 28.In the present embodiment, bushing through hole 28c penetrates through bushing 28 along vertical direction Z.
Bushing 28 is fixed on prominent canister portion 23 by rubber cover 29.As shown in figure 4, when along vertical direction Z observation, rubber cover 29 be in the substantially C word shape of side opening to the right.Rubber cover 29 is fixed on the end of the downside of protrusion 23d by screw 94.As a result, Rubber cover 29 is fixed on the radial outer side of prominent canister portion 23.As shown in figure 5, rubber cover 29 is covered from radial outside draws hole portion Gap between 23c and bushing 28.Thereby, it is possible to inhibit moisture etc. from the gap infiltration drawn between hole portion 23c and bushing 28 The inside of prominent canister portion 23.Also, in the present embodiment, can more it press down due to drawing hole portion 23c to lower opening The inside in the infiltration such as moisture processed protruding cylinder portion 23.
The face contact of the downside of the inner edge portion and flange of bush portion 28b of rubber cover 29.The inner edge portion of rubber cover 29 is to protrusion The face of the downside of 23d presses flange of bush portion 28b.Bushing 28 is fixed on protrusion 23d as a result,.
As shown in Fig. 2, bottom 23b extends radially, and cover the left side of motor drive shaft 31.The outer radial periphery of bottom 23b Edge is connect with the end in the left side of canister portion main body 23a.Bottom 23b closes the opening in the left side of canister portion main body 23a.
Bearing cage 24 is in from bottom 23b tubular outstanding to the right.As shown in Figure 4 and 5, in present embodiment In, bearing cage 24 is in the cylindrical shape centered on central axis J.Bearing cage 24 is located at than prominent canister portion 23 by radial At the position of inside.As shown in Fig. 2, the part in the left side of bearing cage 24 is located at the inside of prominent canister portion 23.Bearing is kept The end on the right side in portion 24 protrudes to the right than prominent canister portion 23.In the present embodiment, the end on the right side of bearing cage 24 Portion is located at the position of the face in the left side than aftermentioned circuit board 80 on the right side.
Bearing cage 24 keeps the second motor bearing 72.In more detail, bearing cage 24 keeps the in inner peripheral surface Two motor bearing 72.Cover member 21 keeps the second motor bearing 72 as a result,.As shown in Fig. 2, in the present embodiment, the second horse It is located at the end in the left side in the inside of bearing cage 24 up to bearing 72.In the inside of bearing cage 24 inserted with motor drive shaft The end in 31 left side.
Bracket 22 is fixed on the right side of cover member 21.There is bracket 22 first cover 22a, bracket canister portion 22b, third to fix Portion 22i, protrusion 25 and maintaining part 26.First cover 22a extends radially, and covers the right side of stator 40.As Fig. 6 with And shown in Fig. 7, when along axial X observation, the shape of the first cover 22a is in the round centered on central axis J.
As shown in Fig. 2, there is the first cover 22a the motor drive shaft for penetrating through the first cover 22a along axial X to be inserted into through hole 22c. Motor drive shaft is inserted into through hole 22c for example in the round centered on central axis J.Motor drive shaft 31 passes through motor drive shaft insertion perforation Hole 22c.First cover 22a has the first hole portion 22d being recessed to the left.In the present embodiment, the first hole portion 22d is along axial direction X penetrates through the first cover 22a.First hole portion 22d is located at than motor drive shaft insertion through hole 22c at the position of radial outside.First Hole portion 22d is for example in rounded shape.Illustration omitted, but in the present embodiment, the first hole portion 22d in circumferential complete cycle at equal intervals There are three settings.
As shown in fig. 6, the first cover 22a has the recess portion being recessed facing towards left side from the right side of the first cover 22a 22f.Recess portion 22f is open to radial outside.Recess portion 22f is circumferentially arranged have it is multiple.Multiple recess portion 22f are in circumferential complete cycle etc. Interval configuration.
As shown in figure 8, the first cover 22a has the through hole 22h for penetrating through the first cover 22a along axial X.In this embodiment party In formula, through hole 22h penetrates through the first cover 22a until from the bottom surface of recess portion 22f to the face in the left side of the first cover 22a.Screw 91 pass through through hole 22h from right side.Screw 91 is fastened via the through hole 42c of through hole 22h and aftermentioned iron core protrusion 42b In cover member 21.In the present embodiment, screw 91 is anchored on the internal thread hole in the end face setting on the right side of cover canister portion 21b It is interior.The first cover 22a and cover canister portion 21b is fixed up as a result, and bracket 22 is fixed on cover member 21.
Bracket canister portion 22b is in the tubular extended to the left from the outer radial periphery edge of the first cover 22a.As shown in figure 5, In present embodiment, bracket canister portion 22b is in the cylindrical shape centered on central axis J.As shown in Fig. 2, a left side of bracket canister portion 22b The end of side is embedded in the radially inner side of fitting cylinder section 21c.
Third fixed part 22i is prominent from the part on the right side in the inner peripheral surface of bracket canister portion 22b to radially inner side.Third is solid The end for determining the right side of portion 22i is connect with the first cover 22a.The end in the left side of third fixed part 22i is located at than bracket canister portion At the position of the end in the left side of 22b on the right side.When along axial direction X observation, the ratio in third fixed part 22i and cover canister portion 21b is embedding Close canister portion 21c partially overlapping by radially inner side.Illustration omitted, but third fixed part 22i it is circumferentially arranged have it is multiple.
Protrusion 25 protrudes to the right from the first cover 22a.As shown in Fig. 6 and Fig. 7, in the present embodiment, protrusion Portion 25 is in the cylindrical shape centered on central axis J.As shown in Fig. 2, protrusion 25, which is located at, leans on radial outside than the first hole portion 22d Position at.The outer diameter and internal diameter of protrusion 25 are smaller than the outer diameter and internal diameter of bracket canister portion 22b, and than prominent canister portion 23 Outer diameter and internal diameter it is big.Second bearing 74 is installed in protrusion 25.That is, in the present embodiment, second bearing 74 is installed In bracket 22.Second bearing 74 is installed on casing 20 as a result,.In more detail, second bearing 74 is chimeric and is fixed on protrusion 25 outer peripheral surface.
Protrusion 25 has the groove portion 25a being recessed from the outer peripheral surface of protrusion 25 towards radially inner side.Illustration omitted, but slot Portion 25a is annular in shape, and is set to the complete cycle of the outer peripheral surface of protrusion 25.Groove portion 25a is set in the outer peripheral surface of protrusion 25 The part for being fixed with second bearing 74.Cricoid second seal member 76 has been embedded in groove portion 25a.Second seal member 76 Between the inner peripheral surface of inner ring and the outer peripheral surface of protrusion 25 for closing second bearing 74.That is, the second seal member 76 closing second Between bearing 74 and casing 20.Therefore, it is able to suppress the inside that moisture etc. penetrates into output section 60.In the present embodiment, second Seal member 76 is, for example, O-ring.
As shown in Fig. 6 and Fig. 7, the radially inner side face of protrusion 25 has first surface 25b.In the present embodiment, First surface 25b is that the radially inner side face of protrusion 25 is whole.When along axial direction X observation, first surface 25b is circumferentially.? In present embodiment, when along axial X observation, first surface 25b is in the round centered on central axis J.First surface 25b The cutting face being e.g. made by machining.
As shown in Fig. 2, week of the maintaining part 26 in the motor drive shaft insertion through hole 22c from the left side of the first cover 22a Edge tubular outstanding to the left.In the present embodiment, maintaining part 26 is in the cylindrical shape centered on central axis J.It keeps Portion 26 keeps the first motor bearing 71 in radially inner side.Bracket 22 keeps the first motor bearing 71 as a result,.
As shown in figure 9, bracket 22 also has supporting part 22g and positioning region 27.Supporting part 22g is from the right side of the first cover 22a Ratio protrusion 25 in side protrudes to the right by the radially outer edge portion of the part of radially inner side.When along axial direction X observation, supporting part 22g is in substantially rectangular shape.The face on the right side of supporting part 22g is the flat surface vertical with axial X.Illustration omitted, but supporting part 22g Three are equidistantly provided in circumferential complete cycle.The internal thread hole 22e being recessed to the left is provided in each supporting part 22g.Such as Shown in Fig. 3, in the present embodiment, internal thread hole 22e penetrates through the first cover 22a along axial X.
As shown in figure 9, positioning region 27 is prominent from the right side of the first cover 22a towards right side.Positioning region 27 is located at than prominent Portion 25 is played at the position of radially inner side.Positioning region 27 is located at the radial outside of the circumferential end in supporting part 22g.Positioning region 27 It is connect with the inner peripheral surface of protrusion 25.As shown in fig. 7, in the present embodiment, protrusion 25 is arranged across interval in the circumferential There are two.
As shown in Fig. 2, rotor 30 has motor drive shaft 31 and rotor subject 32.Motor drive shaft 31 is in centered on central axis J And extend along axial X cylindric.Motor drive shaft 31 extends to the right from the inside of prominent canister portion 23, and passes through via motor drive shaft insertion Through-hole 22c projects to the outside of casing 20.Motor drive shaft 31 is by the first motor bearing 71 and the bearing of the second motor bearing 72 can Rotation.
Rotor subject 32 is fixed on the outer peripheral surface of motor drive shaft 31.In the present embodiment, rotor subject 32 is located at bracket cylinder The radially inner side of portion 22b.Rotor subject 32 has rotor core 32a and rotor magnet 32b.That is, rotor 30 has rotor core 32a and rotor magnet 32b.Rotor core 32a is fixed on the outer peripheral surface of motor drive shaft 31.Rotor magnet 32b is fixed on rotor core 32a.In the present embodiment, rotor magnet 32b is embedded in and is fixed in the hole along axial X perforation rotor core 32a.
First motor bearing 71 and the second motor bearing 72 are, for example, ball bearing.First motor bearing 71 is than rotor iron Motor drive shaft 31 is supported as that can rotate at the position of core 32a on the right side.First motor bearing 71 is than aftermentioned planetary gear 52 support motor drive shaft 31 for that can rotate at the position in left side.Therefore, it is configured at the first motor bearing 71 than planet tooth The such situation in the position of wheel 52 on the right side is compared, and is easy to minimize driving device 10 on axial X.First motor bearing 71 It is embedded in the radially inner side of maintaining part 26.In the present embodiment, along axial X observe when, the first motor bearing 71 with it is aftermentioned Planetary gear 52 is overlapped.
The bearing of motor drive shaft 31 is that can rotate at the position for leaning on left side than rotor core 32a by the second motor bearing 72. That is, the second motor bearing 72 can rotate the ratio rotor subject 32 in motor drive shaft 31 by the part bearing in left side.Second horse The radially inner side of bearing cage 24 is embedded in up to bearing 72.
Stator 40 is opposite with rotor 30 across gap radially.In the present embodiment, stator 40 is in rotor 30 Radial outside surrounds rotor 30.Stator 40 has stator core 41, insulating part 44 and multiple coils 45.
Stator core 41 is located at the radially inner side of bracket canister portion 22b.Stator core 41 has core-back 42 and multiple teeth 43.Core-back 42 is in ring-type circumferentially.As shown in Figure 10, core-back 42 has core-back main body 42a and iron core convex Portion 42b.That is, stator core 41 has core-back main body 42a and iron core protrusion 42b.In the present embodiment, core-back master Body 42a is in the annular shape centered on central axis J.
Iron core protrusion 42b is prominent from core-back main body 42a to radial outside.In the present embodiment, iron core protrusion 42b It is provided with multiple.Multiple iron core protrusion 42b are configured at equal intervals in circumferential complete cycle.As shown in Fig. 2, iron core protrusion 42b has Along the through hole 42c of axial direction X perforation iron core protrusion 42b.
The face in the left side of iron core protrusion 42b directly with the face contact towards right side in cover member 21.In present embodiment In, the face in the left side of iron core protrusion 42b is directly contacted with the end face on the right side of cover canister portion 21b.That is, stator core 41 is directly and machine Shell 20 contacts.Therefore, the heat generated in multiple coils 45 is easy to be discharged from stator core 41 to casing 20.It is discharged to casing 20 Heat via the first fixed part 21d to the chassis of driving body be discharged.Thus, it is possible to suitably online to the release of the chassis of driving body The heat generated in circle 45.By the above, according to the present embodiment, can be improved the thermal diffusivity of driving device 10.
Also, according to the present embodiment, casing 20 has cover member 21 and bracket 22, and the first fixed part 21d is set to cover Component 21.Moreover, stator core 41 is directly contacted with cover member 21.Therefore, it is easy to make connecing in casing 20 with stator core 41 The part of touching is close to the first fixed part 21d.Thereby, it is possible to shorten the heat dissipation path in casing 20, it is easy via stator core 41 And casing 20 discharges the heat generated in coil 45 to the chassis of driving body.Thus, it is possible to more improve driving device 10 Thermal diffusivity.
Also, according to the present embodiment, the first fixed part 21d is located at than at the second motor bearing 72 position on the right side. Therefore, the first fixed part 21d can be made closer to stator core 41.Thereby, it is possible to more shorten from stator core 41 to row The heat dissipation path until the chassis of body is sailed, so as to more improve the thermal diffusivity of driving device 10.
Also, according to the present embodiment, the inside of casing 20 is closed.It in this case, can not be defeated by air etc. It is sent to the inside of casing 20, thus can not be using the method by the cooling coil 45 of air-cooled mode.Thus, in such as present embodiment The inside of such casing 20 by the case where closed, and contacting stator core 41 directly with casing 20 to The structure of the heat of the chassis release coil 45 of driving body is particularly useful.
In the present embodiment, the face on the right side in a part of iron core protrusion 42b in multiple iron core protrusion 42b and third The face contact in the left side of fixed part 22i.That is, in the present embodiment, stator core 41 is also directly contacted with bracket 22.As a result, It, also can be easily to the heat of the chassis release coil 45 of driving body via the path for passing through cover member 21 from bracket 22.Thus, The thermal diffusivity of driving device 10 can more be improved.A part of iron core protrusion 42b in multiple iron core protrusion 42b is on axial X Quilt cover canister portion 21b and third fixed part 22i clamping.It is contacted by third fixed part 22i with iron core protrusion 42b, bracket 22 is in axis Cover member 21 is positioned on X.There are three the iron core protrusion 42b contacted with third fixed part 22i is for example arranged.
A part of iron core protrusion 42b in multiple iron core protrusion 42b is the second fixed part being fixed up with cover member 21 42d.Second fixed part 42d is fixed on cover member and being anchored on cover member 21 across the screw 90 of through hole 42c from right side 21.In the present embodiment, screw 90 is anchored in the internal thread hole of the end face setting on the right side of cover canister portion 21b.Second is solid Determine the iron core protrusion 42b that portion 42d is the iron core protrusion 42b different from contacting with third fixed part 22i, such as there are three settings.
In this way, being easy to make stator core 41 by the way that stator core 41 is fixed on cover member 21 by the second fixed part 42d More reliably contacted with cover member 21.Therefore, it is easy to improve the thermal diffusivity of driving device 10.
As above-mentioned, in the present embodiment, multiple iron core protrusion 42b include to have for for bracket 22 to be fixed on cover portion The iron core protrusion 42b for the through hole 42c that the screw 91 of part 21 passes through.Iron core protrusion 42b is to be also differs from and third fixed part The iron core protrusion 42b of the iron core protrusion 42b and the iron core protrusion 42b as the second fixed part 42d of 22i contact, such as be arranged There are six.
Multiple teeth 43 extend from core-back 42 to radially inner side.Illustration omitted, but multiple teeth 43 are in circumferential complete cycle It configures at equal intervals.Insulating part 44 is installed on stator core 41.Multiple coils 45 are installed on stator core 41 across insulating part 44.More In detail, multiple coils 45 are installed on each tooth 43 in multiple teeth 43 across insulating part 44 respectively.
In the present embodiment, the part in the left side of insulating part 44 and the left side of coil 45 are inserted partially into cover canister portion The inside of 21b, and be located on axial X at position identical with the part on right side of the first fixed part 21d.That is, first is fixed Portion 21d has positioned at the part of axial position identical at least part of stator 40.It therefore, can be by the first fixed part 21d is configured at the position further towards stator core 41.Thereby, it is possible to further shorten from stator core 41 to driving body Heat dissipation path until chassis, so as to further increase the thermal diffusivity of driving device 10.
Circuit board 80 is contained in the inside of casing 20 at the position for leaning on left side than rotor subject 32.In present embodiment In, circuit board 80 is contained in the inside of cover member 21.Therefore, it is easy from cover member 21 via the first fixed part 21d to driving body Chassis discharge the heat that generates in circuit board 80.Thereby, it is possible to more improve the thermal diffusivity of driving device 10.
Circuit board 80 is located at the right side of prominent canister portion 23.As shown in figure 11, circuit board 80 is in plate of the plate face towards axial X Shape.Circuit board 80 has the recess portion 80a being recessed to radial outside.The right side for having bearing cage 24 is fitted into recess portion 80a End.The face on the right side of circuit board 80 is for example positioned at roughly the same with the end face on the right side of bearing cage 24 on axial X At position.
Rotation sensor 86 is installed on circuit board 80.In the present embodiment, rotation sensor 86 is by installing component 85 It is installed on the face on the right side of circuit board 80.Installing component 85 is circumferentially.Installing component 85 is fixed on the right side of circuit board 80 Face.The rotation of the detection rotor 30 of rotation sensor 86.Rotation sensor 86 is, for example, Magnetic Sensor.It, can as Magnetic Sensor To enumerate Hall element and the magnetoresistive element etc. that include Hall IC.In the present embodiment, rotation sensor 86 is, for example, suddenly That element, and there are three settings.Three rotation sensors 86 are fixed on installing component 85, and circumferentially configure across interval.
As shown in Fig. 2, connector 81 is prominent to the left from circuit board 80.The end in the left side of connector 81 is located at protruding cylinder The inside in portion 23.Connector 81 is located at than stator 40 at the position of radially inner side.It therefore, can be radially close to central axis Line J and configure connector 81.As a result, with connector 81 is configured to feelings as the position that is overlapped on axial X with stator 40 Condition is compared, and the outer diameter for accommodating the protrusion canister portion 23 of the end in left side of connector 81 can be reduced.Thus, according to this embodiment party Formula can be such that casing 20 minimizes radially, so as to minimize driving device 10.
In the present embodiment, connector 81 is located at the position that radially inner side is leaned on than the radial outer side of rotor subject 32 Place.Therefore, connector 81 can be configured closer to motor drive shaft 31 radially.Thereby, it is possible to more reduce prominent canister portion 23 outer diameter, so as to minimize casing 20 more radially.In the present embodiment, when being observed along axial X, connection Device 81 is overlapped in the radially inner side of stator 40 with rotor subject 32.
In the present embodiment, connector 81 is located at than the second motor bearing 72 at the position of radial outside.Therefore, energy It is enough suitably to configure connector 81 far from motor drive shaft 31 radially.Thereby, it is possible to inhibit connector 81 and and connector The cable 83 of 81 connections touches motor drive shaft 31.The end in the left side of connector 81 is located at the radial outside of bearing cage 24. That is, in the present embodiment, the end in the left side of connector 81 is located between prominent canister portion 23 and the radial direction of bearing cage 24. Thereby, it is possible to more connector 81 and cable 83 be inhibited to contact with motor drive shaft 31 by bearing cage 24.
Also, according to the present embodiment, the end on the right side of bearing cage 24 is located at the face in the left side than circuit board 80 At position on the right side.Therefore, compare bearing from being integrally located at facing towards left side connector 81 outstanding for the left side of circuit board 80 The end on the right side of maintaining part 24 is at the position in left side.Thereby, it is possible to stop connector 81 whole using bearing cage 24 Between the radial direction of motor drive shaft 31.Thus, it is possible to more connector 81 and cable 83 be inhibited to contact with motor drive shaft 31.
The end in the left side of connector 81 is located at the end than the right side for drawing hole portion 23c at the position in left side.As a result, The end on the right side for the bushing 28 being embedded in extraction hole portion 23c is located at the position of the end in the left side than connector 81 on the right side Place.It therefore, can be by a part configuration of a part of connector 81 and bushing 28 in identical axial position.Thus, it is possible to The axial X dimension of prominent canister portion 23 is reduced, so as to minimize casing 20 on axial X.Thereby, it is possible to make driving device 10 more minimize.
As shown in Figure 4 and 5, in the present embodiment, connector 81 is for example provided with connector 81a and connector 81b the two.In the present embodiment, connector 81a, 81b is in the quadrangular shape extended along axial X.Connector 81a with connect Device 81b is configured across interval in the circumferential.
Cable 83 is electrically connected by connector 81 with circuit board 80.As shown in Fig. 2, cable 83 is from the left side of connector 81 It is drawn via extraction hole portion 23c to the radial outside of prominent canister portion 23 end.As shown in Figure 4 and 5, cable 83 has prominent Part between canister portion 23 and the radial direction of bearing cage 24 circumferentially out.
In the present embodiment, cable 83 is drawn via bushing through hole 28c to the external of prominent canister portion 23.Therefore, energy Enough cable 83 is supported by the medial surface of bushing through hole 28c.Thereby, it is possible to steadily to the outside of prominent canister portion 23 Outgoing cable 83.In the present embodiment, cable 83 be provided with cable 83a and cable 83b the two.Cable 83a and connector 81a connection.Cable 83b is connect with connector 81b.
In the present embodiment, cable 83a is electrically connected by connector 81a with rotation sensor 86.Cable 83b is by even Device 81b is met to be electrically connected with coil 45.Cable 83a, 83b are connect in the outside of prominent canister portion 23 with external device (ED) (not shown).By This, circuit board 80 is electrically connected by cable 83a, 83b and connector 81a, 81b with external device (ED).External device (ED) is to driving The control device etc. of the supply power supply of device 10.
As shown in figure 3, planetary gear mechanism 50 has sun wheel portion 31a, wheel carrier 51, support shaft 53, multiple planetary gears 52, multiple planetary gear shafts 56 and internal gear 54.Sun wheel portion 31a is set to the part on the right side of motor drive shaft 31.In this reality It applies in mode, the outer peripheral surface in the end on the right side that sun wheel portion 31a is set to motor drive shaft 31.
Wheel carrier 51 is located at the right side of bracket 22.Wheel carrier 51 is fixed on bracket 22.That is, wheel carrier 51 is fixed on casing 20.Wheel carrier 51 have the second cover 51a, multiple foot 51d, bearing canister portion 51b, rib 51m and bearing support 51n.
As shown in fig. 6, in the present embodiment, the second cover 51a is in centered on central axis J and plate face is towards axial direction X's is disk-shaped.Second cover 51a is located at the right side of planetary gear 52.Second cover 51a is located at the position than protrusion 25 on the right side Set place.As shown in figure 3, there is the second cover 51a the support shaft for penetrating through the second cover 51a along axial X to be inserted into through hole 51k.Branch Axis insertion through hole 51k is held for example in the round centered on central axis J.Support shaft 53 passes through support shaft and is inserted into through hole 51k。
Second cover 51a has the second hole portion 51p being recessed to the right.In the present embodiment, the second hole portion 51p is along axis The second cover 51a is penetrated through to X.Second hole portion 51p is located at than support shaft insertion through hole 51k at the position of radial outside.Such as Shown in Fig. 6, in the present embodiment, the second hole portion 51p is located at the radially outer edge portion of the second cover 51a.Second hole portion 51p is for example It is in rounded shape.In the present embodiment, the second hole portion 51p is equidistantly provided with three in circumferential complete cycle.As shown in figure 3, When along axial direction X observation, each first hole portion 22d overlaps respectively with each second hole portion 51p.In the present embodiment, the second hole Internal diameter of the internal diameter of portion 51p for example than the first hole portion 22d is big.
Multiple foot 51d extend to the left from the second cover 51a.As shown in Fig. 6 and Fig. 7, multiple foot 51d are than prominent Portion 25 is played circumferentially to configure at the position of radially inner side.In the present embodiment, multiple foot 51d are in circumferential complete cycle etc. It is arranged at intervals with three.Foot 51d has foot main part 51e and foot fixed part 51f.
Foot main part 51e linearly extends to the left from the radially outer edge portion of the second cover 51a.Foot fixed part 51f from Foot main part 51e is prominent to radial outside.Foot fixed part 51f is located at the radially inner side of protrusion 25.Multiple foot fixed part 51f are embedding Together in the radially inner side of protrusion 25.As shown in figure 3, the face in the face and the right side of supporting part 22g in the left side of foot fixed part 51f connects Touching.
Foot fixed part 51f has the mounting hole 51j along axial X perforation foot fixed part 51f.Foot fixed part 51f is by from the right side Side is anchored on the internal thread hole 22e in the first cover 22a setting across the screw 92 of mounting hole 51j and is fixed on the first cover 22a.Foot 51d is fixed on bracket 22 as a result,.
As shown in figure 12, foot fixed part 51f has location indentations 51h.Location indentations 51h is from the left side of foot fixed part 51f Facing towards right side be recessed.Location indentations 51h is located at the end of the circumferential side in the end of the radial outside of foot fixed part 51f Portion.Location indentations 51h is to a circumferential side opening.As shown in fig. 7, in the present embodiment, location indentations 51h is set to three feet Two foot fixed part 51f in fixed part 51f.It is set to what the location indentations 51h of two foot fixed part 51f was open in the circumferential Direction is mutually opposite.
Side towards circumferential side in the medial surface of two location indentations 51h with it is each fixed in two positioning regions 27 Position portion 27 contacts.That is, the circumferential side contacts of positioning region 27 and foot 51d and opposite.The week of positioning region 27 and wheel carrier 51 as a result, To side contacts and opposite.Thus, it is possible to which wheel carrier 51 is positioned at bracket 22 in the circumferential by positioning region 27.
Also, the direction that in the present embodiment, two location indentations 51h are open in the circumferential is mutually opposite.Lead to as a result, It crosses positioning region 27 to contact with the peripheral side of two location indentations 51h respectively, is able to suppress wheel carrier 51 relative to bracket 22 to week It is mobile to two sides.
As shown in figure 3, bearing canister portion 51b is in from the second cover 51a tubular outstanding to the left.Support canister portion 51b be in Cylindrical shape centered on central axis J.Bearing canister portion 51b is located at the radially inner side of multiple foot 51d.Support a left side of canister portion 51b The end of side is located at the position of the end in the left side than foot 51d on the right side.The inner peripheral surface of bearing canister portion 51b is provided with branch The internal diameter of canister portion 51b is held with the stage portion 51c to become larger from right side towards left side.
Rib 51m connection supports the outer peripheral surface and foot main part 51e of canister portion 51b.Illustration omitted, but rib 51m is in the complete of circumferential direction Three are equidistantly provided on week.Bearing support 51n is inserted into through hole from the support shaft in the face on the right side of the second cover 51a The peripheral part of 51k protrudes to the right.In the present embodiment, bearing support 51n is in the annulus centered on central axis J Shape.
As shown in fig. 7, wheel carrier 51 has the second curved surface 51g.In the present embodiment, the second curved surface 51g is respectively arranged at The radial outer side of each foot 51d.That is, in the present embodiment, there are three the second curved surface 51g settings.In the present embodiment, Second curved surface 51g is the radial outer side of foot fixed part 51f.Second curved surface 51g is located at the radially inner side of first surface 25b.Edge When axial X is observed, the second curved surface 51g is circumferentially.When along axial direction X observation, the second curved surface 51g in being with central axis J in The arc-shaped of the heart.Second curved surface 51g is contacted with first surface 25b.Second curved surface 51g is, for example, to be cut by what machining was made into Bevel.
As shown in figure 3, support shaft 53 is installed on wheel carrier 51.In the present embodiment, support shaft 53 is in be with central axis J Center simultaneously extends cylindric along axial X.Support shaft 53 is embedded in bearing canister portion 51b.Illustration omitted, but in support shaft 53 Outer peripheral surface is provided with D-shaped notch.Thus, it is suppressed that support shaft 53 is rotated relative to wheel carrier 51.Support shaft 53 passes through support shaft It is inserted into through hole 51k, and is protruded to the right compared to wheel carrier 51.As a result, support shaft 53 from wheel carrier 51 along central axis J to the right Extend.
Support shaft 53 has support shaft main part 53a and wide diameter portion 53b.Support shaft main part 53a is inserted into across support shaft Through hole 51k, and protruded to the right compared to wheel carrier 51.The end on the right side of support shaft main part 53a is to the right than output section 60 Side is prominent.Outer peripheral surface in the end on the right side of support shaft main part 53a is provided with external thread part.Nut 55 is anchored on bearing The external thread part of shaft body portion 53a.
Part outstanding is fitted into and is fixed with first bearing 73 ratio wheel carrier 51 in support shaft main part 53a to the right Inner ring.First bearing 73 is installed on support shaft 53 as a result,.That is, in the present embodiment, first bearing 73 is installed on planetary gear Mechanism 50.The inner ring for being installed on the first bearing 73 of support shaft 53 is contacted from right side with bearing support 51n.First bearing 73 Inner ring is clamped on axial X by nut 55 and bearing support 51n.Thereby, it is possible to first bearing 73 is firmly fixed at branch Hold axis 53.
Support shaft main part 53a has the groove portion 53c being recessed to radially inner side.Illustration omitted, but groove portion 53c is in annulus Shape, and it is set to the complete cycle of support shaft main part 53a.Groove portion 53c is set to the fixation in the outer peripheral surface of support shaft main part 53a There is the part of first bearing 73.Cricoid first seal member 75 has been embedded in groove portion 53c.First seal member 75 closing the Between the inner peripheral surface of the inner ring of one bearing 73 and the outer peripheral surface of support shaft main part 53a.That is, the first seal member 75 closing first Between bearing 73 and support shaft 53.Therefore, it is able to suppress the inside that moisture etc. penetrates into output section 60.In the present embodiment, One seal member 75 is, for example, O-ring.
Wide diameter portion 53b is connect with the end in the left side of support shaft main part 53a.Wide diameter portion 53b is outer diameter than support shaft master The big part of the outer diameter of body portion 53a.Wide diameter portion 53b is the end in the left side of support shaft 53.Wide diameter portion 53b is located at bearing canister portion The inside of 51b.The face on the right side of wide diameter portion 53b and the step face contact towards left side of stage portion 51c.Wide diameter portion 53b as a result, It is stuck in stage portion 51c, support shaft 53 is able to suppress and falls off to the right from wheel carrier 51.Also, by fastening nut 55, it can will expand Diameter portion 53b is pressed to the step surface of stage portion 51c.Thereby, it is possible to support shaft 53 is firmly fixed at wheel carrier 51.
Multiple planetary gears 52 are located at the radially inner side of protrusion 25.Multiple planetary gears 52 are on the right side of the first cover 22a Lateral edge is arranged circumferentially.As shown in Fig. 6 and Fig. 7, in the present embodiment, planetary gear 52 is set at equal intervals in circumferential complete cycle There are three setting.Planetary gear 52 has inner cylinder portion 52a, outer cylindrical portion 52c and Circular Plate portion 52b.
Inner cylinder portion 52a is in the cylindrical shape extended along axial X.As shown in figure 3, inner cylinder portion 52a is located at the first cover 22a and Between the axial X of two cover 51a.When along axial direction X observation, the inside of inner cylinder portion 52a and the first hole portion 22d and the second hole portion 51p is overlapped.The part on the right side of inner cylinder portion 52a protrudes to the right than protrusion 25, and the diameter for being located at bearing canister portion 51b is outside Side.Outer peripheral surface in the part on the right side of inner cylinder portion 52a is provided with gear part.
Planetary gear shaft 56 passes through the inside of inner cylinder portion 52a.Planetary gear shaft 56 is cylindric in extending along axial X.Row The end in the left side of star gear shaft 56 is embedded in the first hole portion 22d.The end on the right side of planetary gear shaft 56 is embedded in second In hole portion 51p.Planetary gear shaft 56 penetrates through planetary gear 52 along axial X and is that can rotate by the bearing of planetary gear 52 as a result,.
As shown in Fig. 3 and Fig. 6, outer cylindrical portion 52c is in the cylindrical shape centered on the axis parallel with axial X.Outer cylindrical portion 52c The part in the left side of inner cylinder portion 52a is surrounded from outside.The outer peripheral surface of outer cylindrical portion 52c is provided with gear part.The tooth of outer cylindrical portion 52c Wheel portion is engaged with sun wheel portion 31a.Outer cylindrical portion 52c is located at the radially inner side of protrusion 25.As shown in figure 3, outer cylindrical portion 52c's is outer Inner peripheral surface of the circumferential surface to radially inner side far from protrusion 25 and configure.As a result, planetary gear 52 and protrusion 25 radially every Clearance G it is opposite.Thus, it is possible to which planetary gear 52 is inhibited to generate friction with the inner peripheral surface of protrusion 25 when rotated.Also, energy It is enough that lubricating oil is kept in clearance G, so as to supply lubricating oil to the gear part of outer cylindrical portion 52c.
In the present embodiment, outer cylindrical portion 52c is located at position identical with protrusion 25 and second bearing 74 on axial X Set place.That is, planetary gear 52, protrusion 25 and second bearing 74 have positioned at the part of identical axial position.Therefore, energy Minimize driving device 10 on axial X.
Circular Plate portion 52b is in plate of the plate face towards axial X.When along axial direction X observation, Circular Plate portion 52b is annular in shape.Circle The outer peripheral surface of ring flat-plate portion 52b connection inner cylinder portion 52a and the inner peripheral surface of outer cylindrical portion 52c.
Internal gear 54 is located at the radial outside of the right part of wheel carrier 51.Internal gear 54 is in the multiple planetary gears 52 of encirclement The ring-type of radial outside.Internal gear 54 has internal tooth wheel body 54a and fixed plate portion 54b.Internal tooth wheel body 54a is in central axis Cylindrical shape centered on line J.The outer peripheral surface of interior gear body 54a is provided with gear part.The gear part of internal tooth wheel body 54a with It is set to the gear part engagement of the outer peripheral surface of inner cylinder portion 52a.Internal gear 54 is engaged with planetary gear 52 as a result,.
Fixed plate portion 54b is prominent from the outer peripheral surface of internal tooth wheel body 54a towards radial outside.Fixed plate portion 54b is in plate face Plate towards axial X.Illustration omitted, fixed plate portion 54b is for example in the annular shape centered on central axis J.It is seen along axial direction X When examining, fixed plate portion 54b is overlapped with Circular Plate portion 52b and outer cylindrical portion 52c.
As shown in Fig. 2, output section 60 is in the cylinder in the radial outside encirclement planetary gear mechanism 50 of planetary gear mechanism 50 Shape.In the present embodiment, output section 60 is in centered on the central axis J and to the left cylindrical shape for having lid of side opening.Output Portion 60 has output cover 61, output canister portion 62 and wheel mounting portion 63.
Output cover 61 is fixed on the outer ring in first bearing 73.Cover 61 is exported from the outer of the outer ring in first bearing 73 Circumferential surface is extended to radial outside.Export the right side that cover 61 covers planetary gear mechanism 50.Cover 61 is exported by first bearing 73 are rotatably supported in support shaft 53.First bearing 73 supports the part on the right side of output section 60 as a result,.First axle Hold 73 radially inner sides for being located at output cover 61.That is, first bearing 73 is located at the radially inner side of output section 60.As shown in figure 3, The face for exporting the left side of cover 61 is fixed with fixed plate portion 54b by screw 93.Output section 60 and internal gear 54 are fixed as a result, Come.
As shown in Fig. 2, output canister portion 62 is in the cylindrical shape extended to the left from the radially outer edge portion of output cover 61.Output The end in the left side of canister portion 62 is located at the radial outside of protrusion 25.Inner peripheral surface in the end in the left side of output canister portion 62 is solid Surely there is the outer peripheral surface of the outer ring in second bearing 74.The end in the left side of canister portion 62 is exported by the rotatable twelve Earthly Branches of second bearing 74 It holds in protrusion 25.Second bearing 74 supports the part in the left side of output section 60 as a result,.
It, can be by first bearing 73 and second bearing 74 to the right side of output section 60 in this way, according to the present embodiment The part in the left side of part and output section 60 is supported.In the present embodiment, driving device 10 by be set to left side First fixed part 21d is fixed on the chassis of driving body.Therefore, it is easy to the output section 60 for being configured at right side in driving device 10 Apply load.In view of this, according to the present embodiment, can be dispersed by first bearing 73 and second bearing 74 in axial sides Bear the load for being applied to output section 60.Thus, it is possible to which output section 60 is inhibited to tilt relative to axial X.Thereby, it is possible to inhibit pair Each gear of each bearing that output section 60 is supported and the planetary gear mechanism 50 as deceleration mechanism generates loss.
Also, according to the present embodiment, first bearing 73 is installed on planetary gear mechanism 50, and second bearing 74 is installed on machine Shell 20.Therefore, it is easy configured separate first bearing 73 and second bearing 74 on axial X, and is easy to pass through 73 He of first bearing Second bearing 74 supports the axial sides of output section 60.Thereby, it is possible to more suitably dispersions to receive to be applied to output The load in portion 60.Thus, it is possible to more inhibit each bearing supported to output section 60 and as the planet of deceleration mechanism Each gear of gear mechanism 50 generates loss.
Also, the deceleration mechanism according to the present embodiment, slowed down to the rotation of motor drive shaft 31 is planetary gear mechanism 50.Therefore, the quantity of gear contained in deceleration mechanism is easy to increase.Thus, more efficiently acquisition is able to suppress above-mentioned Each gear of deceleration mechanism generates the effect of loss.
Second bearing 74 is located at the radially inner side of output canister portion 62.That is, the diameter that second bearing 74 is located at output section 60 is inside Side.In the present embodiment, second bearing 74 is located at than first bearing 73 at the position of radial outside.
Taking turns mounting portion 63 is the part for being equipped with wheel (not shown).As shown in Figure 1, taking turns mounting portion 63 from output cover 61 Radially outer edge portion protrudes to the right.Take turns for example trapezoidal column of mounting portion 63.Wheel mounting portion 63 is provided with multiple.Multiple wheel installations Portion 63 configures at equal intervals in circumferential complete cycle.In the present embodiment, there are six wheel mounting portion 63 is for example arranged.Such as Fig. 2 institute Show, at the position that wheel mounting portion 63 is overlapped when being located at along axial X observation with second bearing 74.Therefore, it is located at wheel mounting portion 63 The case where leaning on the position of radial outside than second bearing 74 is compared, and can reduce until taking turns mounting portion 63 to second bearing 74 Radial distance.Thereby, it is possible to reduce torque of the wheel mounting portion 63 because being applied to second bearing 74 from the load of wheel receiving.Cause And it can reduce the load for being applied to second bearing 74.
Also, according to the present embodiment, second bearing 74 is located at than first bearing 73 at the position of radial outside.At this In the case where sample, compared with first bearing 73, it is easy to apply second bearing 74 big load.Therefore, the feelings of such structure Under condition, the effect that above-mentioned can reduce is applied to the load of second bearing 74 is more efficiently obtained.
Wheel mounting portion 63 has the internal thread hole 63a being recessed to the left.Internal thread hole 63a is the hole with bottom.At this In embodiment, the spoke of wheel (not shown) is respectively fixed in each wheel mounting portion 63.Spoke is by being anchored on internal thread hole 63a Interior screw and be fixed on wheel mounting portion 63.In the present embodiment, output section 60 is equivalent to the wheel hub of wheel.
Motor part 11 by driving and motor drive shaft 31 rotate when, multiple planetary gears 52 for being engaged with sun wheel portion 31a around The axis of each planetary gear shaft 56 rotates.Moreover, being rotated by multiple planetary gears 52, the internal gear engaged with planetary gear 52 54 rotate around central axis J.The output section 60 for being fixed on internal gear 54 as a result, is rotated around central axis J.So, motor The rotation of axis 31 is decelerated and is transmitted to output section 60.
According to the present embodiment, when being observed along axial X, the first surface 25b of protrusion 25 and the second curved surface of wheel carrier 51 51g circumferentially, and contacts with each other.Thereby, it is possible to be mutually located protrusion 25 and wheel carrier 51 radially, so as to height Axis precision ground mounting bracket 22 and wheel carrier 51.Thus, it is possible to which the high axis precision of the support shaft for being installed on wheel carrier 51 53 is configured at Bracket 22.Therefore, it can configure to high axis precision the first bearing 73 for being installed on support shaft 53 and be installed on the second of bracket 22 Bearing 74.By the above, can be improved defeated for that can be rotated around central axis J by first bearing 73 and the bearing of second bearing 74 The axis precision in portion 60 out.
Also, according to the present embodiment, second bearing 74 is installed on the protrusion 25 with first surface 25b.Therefore, with Second bearing 74 is installed on the case where other parts of bracket 22 and compares, and is easy the Center-to-Center axis J of second bearing 74 Alignment.Thereby, it is possible to configure first bearing 73 and second bearing 74 with more increasing axis precision.Thus, it is possible to more improve output The axis precision in portion 60.
Also, when according to the present embodiment, observing along axial X, first surface 25b is in rounded shape.Therefore, it is capable of increasing The area of one curved surface 25b, to increase the area of the second curved surface 51g contacted with first surface 25b.Thereby, it is possible to more increase Axis precision ground mounting bracket 22 and wheel carrier 51.Thus, it is possible to configure first bearing 73 and second bearing 74 with more increasing axis precision, So as to more improve the axis precision of output section 60.
Also, the radial outer side of the multiple foot 51d according to the present embodiment, circumferentially configured is respectively provided with the second song Face 51g.It therefore, can by keeping multiple foot 51d chimeric with the cylindric protrusion 25 of inner peripheral surface first surface 25b Contact first surface 25b with multiple second curved surface 51g.Thereby, it is possible to inhibit wheel carrier 51 diametrically opposed in protrusion 25 It is mobile, so as to inhibit first surface 25b to separate with the second curved surface 51g.Thus, it is possible to more increasing axis precision mounting bracket 22 and wheel carrier 51.
Also, according to the present embodiment, bracket 22 has and a circumferential side contacts for wheel carrier 51 and opposite positioning region 27. Therefore, such as above-mentioned, wheel carrier 51 can be positioned at bracket 22 in the circumferential.Thereby, it is possible to accurately be aligned the of bracket 22 The circumferential position of second hole portion 51p of one hole portion 22d and wheel carrier 51.Also, it, in the present embodiment, being capable of high axis as above-mentioned Precision ground mounting bracket 22 and wheel carrier 51.Therefore, configuration the first hole portion 22d and second can be accurately overlapped on axial X Hole portion 51p.Thereby, it is possible to inhibit the end of axial sides to be embedded in the planetary gear in the first hole portion 22d and the second hole portion 51p Axis 56 is tilted relative to axial X.Thus, it is possible to inhibit planetary gear 52 to tilt, so as to inhibit the gear of planetary gear 52 Portion and loss is generated with the gear part meshed gears portion of planetary gear 52.
Also, according to the present embodiment, a circumferential side contacts of the positioning region 27 and foot 51d with the second curved surface 51g. Therefore, by be aligned foot 51d position, can determine wheel carrier 51 relative to bracket 22 radial position and wheel carrier 51 relative to Both circumferential positions of bracket 22.Thus, it is possible to be aligned wheel carrier 51 with bracket 22.
Also, according to the present embodiment, first surface 25b and the second curved surface 51g is cutting face.It therefore, can be by The surface accuracy of one curved surface 25b and the surface accuracy of the second curved surface 51g set relatively high.As a result, by making first surface 25b It is contacted with the second curved surface 51g, configures bracket 22 and wheel carrier 51 with capable of more increasing axis precision.
In the present embodiment, first surface 25b and the second curved surface 51g are by simultaneously clamping on bracket 22 and wheel carrier 51 Primary clamping on lathe is processed and is made into.Thereby, it is possible to accurately be aligned the center of curvature of first surface 25b and the second song The center of curvature of face 51g.Thus, it is contacted by making first surface 25b with the second curved surface 51g, is matched with capable of more increasing axis precision Set bracket 22 and wheel carrier 51.
The present invention is not limited to above-mentioned embodiments, additionally it is possible to use other structures.If when along axial X observation, the One curved surface and the second curved surface circumferentially, and contact with each other, then are not particularly limited.When along axial direction X observation, first surface can also With not in rounded shape.First surface circumferentially arranged can also have multiple.In this case, protrusion can also be circumferentially arranged It is multiple.Second curved surface can also only setting one.When along axial direction X observation, the second curved surface can also be in rounded shape.First surface with And second curved surface may not be cutting face.It can also be not provided with first surface and the second curved surface.Positioning region can also only be set Set one.It can also be not provided with positioning region.
Stator core can also the part in addition to the second fixed part directly and chassis contact.Core-back main body can also With direct and chassis contact.Stator core directly can be contacted only with cover member, can also directly only be contacted with bracket.Stator iron Core can not also direct and chassis contact, but indirectly with chassis contact.
Connector can only be arranged one, also can be set three or more.Connector can also not have axial position with Draw the identical part of hole portion.It can also be not provided with connector and rotation sensor.It can also be not provided with bushing.It can not also Rubber cover is set.
The structure of planetary gear mechanism is not particularly limited.Planetary gear mechanism is also possible to planetary gear around central axis J revolves and makes the structure of wheel carrier rotation.Deceleration mechanism is also possible to the deceleration mechanism in addition to planetary gear mechanism.
Taking turns mounting portion can also be located at than second bearing at the position of radially inner side.Even if in this case, also can Reduce the torque that wheel mounting portion is applied to second bearing because of the load born from wheel, is applied to second bearing so as to reduce Load.Internal gear can not be mutually seperated component with output section, be also possible to a part of same single part.Output Portion can not also constitute a part of wheel.
It the inside of casing can not also be closed.As long as first bearing supports the part on the right side of output section, Any position can be installed on.As long as second bearing supports the part in the left side of output section, it can also be installed on and appoint What position.Second bearing can also for example be installed on bracket canister portion.
The 3rd bearing supported to output section also can be set in driving device 110 as shown in fig. 13 that.Such as Figure 13 institute Show, driving device 110 also has 3rd bearing 177 and third seal member 178.3rd bearing 177 is, for example, ball bearing.Third Bearing 177 is installed on bracket 122.In more detail, 3rd bearing 177 is chimeric and is fixed on the outer peripheral surface of bracket canister portion 122b. That is, 3rd bearing 177 is fixed on the radial outer side of casing 120.3rd bearing 177 is located at the position that left side is leaned on than second bearing 74 Set place.3rd bearing 177 is located at than second bearing 74 at the position of radial outside.When radially observing, 3rd bearing 177 with Stator 40 is overlapped.
In driving device 110, bracket canister portion 122b has the outer peripheral surface from bracket canister portion 122b recessed towards radially inner side Sunken groove portion 122j.Illustration omitted, but groove portion 122j is annular in shape, and is set to the complete cycle of the outer peripheral surface of bracket canister portion 122b. Groove portion 122j is set to the part for being fixed with 3rd bearing 177 in the outer peripheral surface of bracket canister portion 122b.It is embedded in groove portion 122j Enter to have cricoid third seal member 178.Third seal member 178 closes the inner peripheral surface and bracket of the inner ring of 3rd bearing 177 Between the outer peripheral surface of canister portion 122b.That is, third seal member 178 is closed between 3rd bearing 177 and bracket 122.Therefore, can Moisture etc. is inhibited to penetrate into the inside of output section 160.Third seal member 178 is, for example, O-ring.
In driving device 110, the output canister portion 162 of output section 160 have first part 164, second part 165 and Part III 166.First part 164 is identical as output canister portion 62 shown in Fig. 2.Second part 165 is from a left side for first part 164 The end of side extends to radial outside.Second part 165 is in plate of the plate face towards axial X, and in centered on central axis J Annular shape.Part III 166 is in the cylindrical shape extended to the left from the outer radial periphery edge of second part 165.Part III 166 are located at the radial outside of bracket canister portion 122b.
The outer peripheral surface of the outer ring in 3rd bearing 177 is fixed in the inner peripheral surface in the end in the left side of Part III 166. The end in the left side of Part III 166 is rotatably supported in bracket canister portion 122b by 3rd bearing 177.Third axis as a result, It is that can rotate around central axis J that 177, which are held, by the bearing of output section 60.Thus, it is possible to by first bearing 73, second bearing 74 with And this three of 3rd bearing 177 disperses the load for bearing to be applied to output section 160.Therefore, can more inhibit to output section 160 Each gear of each bearing supported and the planetary gear mechanism 50 as deceleration mechanism generates loss.
In addition, second bearing 74 can also be not provided in the driving device 110 shown in Figure 13.In this case, third Bearing 177 is equivalent to second bearing.When radially observing, the 3rd bearing 177 as second bearing is overlapped with stator 40.Cause This, can configure the 3rd bearing 177 as second bearing farther away from first bearing 73, so as to more suitably divide The scattered load for bearing to be applied to output section 160.
As long as the driving device that the driving device of above-mentioned embodiment rotates the wheel, then purposes is without especially fixed.It carries As long as there is the driving body of driving device that there is the driving body of wheel, then it is not particularly limited.As driving body, such as can enumerate certainly Driving, automobile, wheelchair etc..Also, the type of wheel is not particularly limited.Also, above-mentioned each structure is in mutual reconcilable range It is interior to be appropriately combined.

Claims (10)

1. a kind of driving device, rotates the wheel, which is included
Motor part, the motor part have the motor drive shaft configured along central axis；
Deceleration mechanism, the deceleration mechanism are connect with the axial side of the motor drive shaft；
Output section, the output section are located at the axial side of the motor part, and the rotation of the motor drive shaft is by the speed reducer Structure is transmitted to the output section；And
First bearing and second bearing, the first bearing and the second bearing are by output section bearing for can be around The central axis rotation,
The driving device is characterized in that,
The motor part includes
Rotor, the rotor have the motor drive shaft；
Stator, the stator are opposite with the rotor across gap radially；And
Casing, the casing accommodate the rotor and stator,
The casing has fixed part in the axial other side, and the fixed part is fixed on the driving body equipped with the driving device Chassis,
The first bearing supports the part of the axial side of the output section,
The second bearing supports the part of the axial other side of the output section.
2. driving device according to claim 1, which is characterized in that
The output section has the wheel mounting portion for installing the wheel,
It is leaned at the position that the wheel installation position is overlapped when along end on observation with the second bearing or than the second bearing At the position of radially inner side.
3. driving device according to claim 2, which is characterized in that
The output section surrounds the tubular of the deceleration mechanism in the radial outside in the deceleration mechanism,
The first bearing and the second bearing are located at the radially inner side of the output section,
The second bearing is located at than the first bearing at the position of radial outside.
4. driving device according to any one of claim 1 to 3, which is characterized in that
The first bearing is installed on the deceleration mechanism,
The second bearing is installed on the casing.
5. driving device according to claim 4, which is characterized in that
The casing has bracket, and the bracket has the first cover of the axial side for covering the stator,
The deceleration mechanism is planetary gear mechanism, comprising:
Sun wheel portion, the sun wheel portion are set to the part of the axial side of the motor drive shaft；
Multiple planetary gears, the multiple planetary gear are circumferentially configured in the axial side of first cover, and with it is described The engagement of sun wheel portion；
Cricoid internal gear, the internal gear surrounds the multiple planetary gear radial outside, and nibbles with the planetary gear It closes；
Wheel carrier, the wheel carrier has the second cover positioned at planetary gear axial direction side, and is fixed on the casing；With And
Support shaft, the support shaft is installed on the wheel carrier, and along the central axis, side extends in the axial direction from the wheel carrier,
The first bearing is installed on the support shaft.
6. driving device according to claim 5, which is characterized in that
The bracket has from first cover side protrusion outstanding in the axial direction,
The radially inner side face of the protrusion has first surface when along end on observation circumferentially,
The wheel carrier has the second curved surface of the radially inner side positioned at the first surface,
When along end on observation, second curved surface circumferentially, and is contacted with the first surface,
The second bearing is installed on the protrusion.
7. driving device according to claim 5, which is characterized in that
The second bearing is fixed on the radial outer side of the casing, when radially observing, is overlapped with the stator.
8. driving device according to claim 6 or 7, which is characterized in that
The driving device also includes
First seal member, first seal member are closed between the first bearing and the support shaft；And
Second seal member, second seal member are closed between the second bearing and the casing.
9. driving device as claimed in any of claims 1 to 3, which is characterized in that
The casing has bracket, and the bracket has the first cover of the axial side for covering the stator,
The driving device also has 3rd bearing, and the 3rd bearing is located at the position that the axial other side is leaned on than the second bearing Place is set, and by output section bearing for that can rotate around the central axis,
The 3rd bearing is installed on the bracket.
10. driving device according to claim 9, which is characterized in that
The driving device also has the third seal member closed between the 3rd bearing and the bracket.
CN201810960597.2A 2017-09-15 2018-08-22 Drive device Active CN109505956B (en)

Applications Claiming Priority (4)

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US201762559019P 2017-09-15 2017-09-15
US62/559,019 2017-09-15
JP2018058832A JP7102842B2 (en) 2017-09-15 2018-03-26 Drive
JP2018-058832 2018-03-26

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US20120241233A1 (en) * 2009-12-07 2012-09-27 Ntn Corporation In-wheel motor drive device
CN103003014A (en) * 2011-07-20 2013-03-27 日本精工株式会社 Main shaft apparatus
CN103906933A (en) * 2011-10-28 2014-07-02 西门子公司 Slotted bearing with labyrinth seal rings for air vent flap actuators
CN103359253A (en) * 2012-03-30 2013-10-23 本田技研工业株式会社 Vehicle drive unit
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CN111828552A (en) * 2019-04-16 2020-10-27 株式会社电装 Rotary actuator

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