CN103072476A - Rear axle electrodynamic force drive device of electric vehicle - Google Patents

Rear axle electrodynamic force drive device of electric vehicle Download PDF

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Publication number
CN103072476A
CN103072476A CN2013100502183A CN201310050218A CN103072476A CN 103072476 A CN103072476 A CN 103072476A CN 2013100502183 A CN2013100502183 A CN 2013100502183A CN 201310050218 A CN201310050218 A CN 201310050218A CN 103072476 A CN103072476 A CN 103072476A
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China
Prior art keywords
axle
alternating current
gear
differential casing
housing
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Granted
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CN2013100502183A
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Chinese (zh)
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CN103072476B (en
Inventor
粱道明
符柏海
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Chongqing Dongba Technology Co., Ltd.
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CHONGQING DONGBA MACHINE Co Ltd
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Priority to CN201310050218.3A priority Critical patent/CN103072476B/en
Publication of CN103072476A publication Critical patent/CN103072476A/en
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Abstract

The invention discloses a rear axle electrodynamic force drive device of an electric vehicle. The drive device comprises a reducer shell, wherein the reducer shell is provided with two supports, the two supports support a differential shell, a second driven gear is fixed on the differential shell, a transmission shaft is arranged in the differential shell, a first driven gear and a second drive gear are fixed on the periphery of the transmission shaft, the second drive gear is meshed with the second driven gear, the reducer shell is provided with an end face, a cavity is formed on the end face, a shaft hole is formed in the bottom of the cavity, one end of an alternating current motor stator core is connected with the end face, the other end of the alternating current motor stator core is connected with a rear end cover, the rear end cover, the alternating current motor stator core and the reducer shell are fixed through bolts, one end of a rotor shaft of an alternating current motor supports on the rear end cover, the other end of the rotor shaft of the alternating current motor penetrates through the shaft hole to support on the reducer shell, the first drive gear is fixed on the rotor shaft of the alternating current motor, and the first drive gear is meshed with the first driven gear. The electrodynamic force drive device realizes stepless speed regulation, shifting impact is eliminated, and the heat dissipation of a drive motor is ensured.

Description

The back axle Electronmotive Force actuating device of battery-driven car
Technical field
The present invention relates to the motor rear axle field, particularly relate to a kind of back axle Electronmotive Force actuating device of battery-driven car.
Background technology
The actuating device of existing battery-driven car is generally following two kinds: a kind ofly add two grades of speed-changing mechanisms for drive motor adds power-transfer clutch, this actuating device must arrange clutch configuration, and transmission loss is larger, system effectiveness is low, and complex structure needs periodic replacement zero clutch parts, and cost is high; Although this actuating device has adopted two grades of speed changes, speed ratio differs larger between two grades, impacts excessively in the shift process, and travelling comfort reduces.Another kind of actuating device directly connects many grades of speed-changing mechanisms with drive motor, although this actuating device can be realized many grades of speed changes, adopted common gear transmission but remain, this change-speed box is step change, still exist a constant-speed ratio poor between two grades, exist in the shift process and impact, travelling comfort is low, and can not realize any output speed.
At present, the DC machine that the actuating device of battery-driven car all adopts, also do not use alternating current dynamo as the record of driving motor of electric vehicle, there are wearing and tearing in the brush of DC machine and commufafor, therefore age limit is arranged, and the manufacturing cost of DC machine are also higher, noise is larger, the DC machine of conventional power has armature loop, and rotating speed is lower, generally below 3000rpm.And the drive motor of above-mentioned two kinds of actuating devices, driving device respectively are integrated, drive motor and driving device must pass through assembly connection, when the design battery-driven car, need consider respectively installation site and the footprint of drive motor, driving device, cause the comprehensive Design difficulty of battery-driven car integral body to increase, be unfavorable for the battery-driven car unit design.And the drive motor of existing battery-driven car all adopts enclosed electric machine, and motor needs independently fan cooling by airtight housings close, takies more space, consumes more electric energy.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of back axle Electronmotive Force actuating device of battery-driven car is provided, this back axle Electronmotive Force actuating device can cooperate frequency-variable controller control speed regualtion of AC motor, realize stepless time adjustment, eliminate the impact that exists in the shift process, travelling comfort, realize larger output speed, the stator core directly exposed Air Flow that relies on dispels the heat, independent radiator fan need be set, both improve the heat dissipation of drive motor, dwindled again the volume of back axle Electronmotive Force actuating device.
The object of the present invention is achieved like this:
A kind of back axle Electronmotive Force actuating device of battery-driven car, comprise reducer shell, described reducer shell is provided with for two bearings that diff is installed, described diff is between two bearings, differential casing is supported in two bearings rotationally, the second driven gear circumferentially is fixed on the differential casing, be provided with a transmission shaft in the reducer shell, the axis of this transmission shaft and the second driven gear shaft line parallel, circumferentially be fixed with the first driven gear and the second driving gear on the described transmission shaft, the second driving gear and the engagement of the second driven gear, described reducer shell one side is provided with the end face that is connected and fixed alternating current motor stator core, this end face is provided with for Stator Windings of AC Motor, the local cavity that inserts of AC motor rotor, the bottom of described cavity is provided with the axis hole that the rotor shaft for alternating current dynamo passes, this end face of one end connection reducer housing of alternating current motor stator core, the other end of alternating current motor stator core connects rear side housing, described rear side housing, alternating current motor stator core and reducer shell are fixed by a plurality of bolt-throughs in the lump, rotor shaft one end of described alternating current dynamo is supported in rear side housing rotationally, the other end passes the axis hole of cavity bottom, and the first driving gear of circumferentially fixing, described the first driving gear and the first driven gear mesh the gap oil sealing sealing between the rotor shaft of the axis hole of described cavity bottom and alternating current dynamo, described Stator Windings of AC Motor is three phase windings, and the pig-tail wire of three phase windings is stretched out rear side housing.
The inner chamber of described rear side housing is provided with tachogen, and this tachogen is between the rotor shaft and rear side housing of alternating current dynamo, and the pig-tail wire of tachogen is stretched out rear side housing.
Described the first driving gear is provided with female splines, and the rotor shaft of alternating current dynamo is provided with male splines, the first driving gear and machine shaft spline joint.
One side of described reducer shell is provided with the axis hole for the rotor shaft that transmission shaft and alternating current dynamo are installed, and the axis hole that the rotor shaft of transmission shaft and alternating current dynamo is installed is provided with roller bearing end cap.
Described diff comprises differential casing, semi-axle bevel gear, bevel planet gear, planet axis, the two ends of differential casing are provided with axle sleeve, the axle sleeve at differential casing two ends is supported in two bearings rotationally by bearing, semi-axle bevel gear of each free-running fit in the axle sleeve at differential casing two ends, described semi-axle bevel gear be provided with for the circumferential fixing internal splined hole of semiaxis, be fixed with one in the differential casing perpendicular to the planet axis of semi-axle bevel gear, the a pair of symmetrical planetary wheel of axial restraint on this planet axis, two planetary wheels mesh with two semi-axle bevel gears respectively.
Be provided with thrust washer between the axle sleeve of described differential casing and the semi-axle bevel gear.
Described planet axis is bolted to connection on differential casing.
Be provided with spherical pad between described planetary wheel and the differential casing.
Owing to having adopted such scheme, reducer shell one side of this back axle Electronmotive Force actuating device is provided with the end face that is connected and fixed alternating current motor stator core, this end face is provided with for Stator Windings of AC Motor, the local cavity that inserts of AC motor rotor, retarder and the drive motor of this back axle Electronmotive Force actuating device are combined as a whole, when the design battery-driven car, do not need to consider respectively installation site and the footprint of drive motor, driving device, be beneficial to the battery-driven car design.Alternating current motor stator core one end is fixedly connected on the end face that is connected and fixed alternating current motor stator core of reducer shell, the other end of alternating current motor stator core connects rear side housing, and alternating current motor stator core and reducer shell are fixed by a plurality of bolt-throughs in the lump.Because retarder and drive motor are combined as a whole, stator core directly exposes outside, in the battery-driven car driving process, the heat that stator core produces is taken away by wind, has both improved heat dissipation, does not need again to arrange independently radiator fan again, reduce taking of space, consumed electric energy still less.This back axle Electronmotive Force actuating device has adopted the alternating current dynamo of three phase windings as drive motor, and the alternating current dynamo of three phase windings is asynchronous dynamo, and its drive ability is good, and can save various materials, cost is lower, and alternating current dynamo does not have brush and commufafor, longer service life, noise is lower.Cooperate external frequency-variable controller to realize stepless time adjustment, eliminate the impact that exists in the shift process, travelling comfort is realized larger output speed.Structure is more simple compact, and low cost of manufacture realizes stepless time adjustment by frequency converter, to satisfy the motoring condition of friction speed, adapts to the requirement of travelling of different road conditions, increases the flying power of battery-driven car.
The inner chamber of rear side housing is provided with tachogen, and rotating speed that can the Measurement accuracy motor receives signal for the driver by frequency-variable controller, to handle.
This back axle Electronmotive Force actuating device cooperates frequency-variable controller control speed regualtion of AC motor by said structure, realize stepless time adjustment, eliminate the impact that exists in the shift process, travelling comfort realizes that larger output speed, especially stator core directly expose outside, independent radiator fan need be set, both guaranteed the radiating effect of drive motor, and dwindled again the volume of the back axle Electronmotive Force actuating device of whole battery-driven car, manufacturing cost also is reduced.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 1;
Fig. 4 is that Fig. 3 is the C-C cutaway view.
In the accompanying drawing, 1 is reducer shell, and 1a is bearing, 1b is the end face that is connected and fixed alternating current motor stator core, and 2 is diff, and 3 is the second driven gear, 4 is transmission shaft, and 5 is the first driven gear, and 6 is the second driving gear, 7 is cavity, and 8 is axis hole, and 9 is Stator Windings of AC Motor, 10 is AC motor rotor, and 10a is rotor shaft, and 11 is alternating current motor stator core, 12 is rear side housing, and 13 is bolt, and 14 is oil sealing, 15 is the first driving gear, and 16 is tachogen, and 17 is roller bearing end cap, 21 is differential casing, and 211 is axle sleeve, and 22 is semi-axle bevel gear, 23 is bevel planet gear, 24 is planet axis, and 25 is thrust washer, and 26 is spherical pad.
The specific embodiment
Referring to Fig. 1~Fig. 4, a kind of embodiment for the back axle Electronmotive Force actuating device of battery-driven car, comprise reducer shell 1, described reducer shell 1 is provided with for two bearing 1a that diff 2 is installed, base rear end is provided with the flange of captiveing joint for back axle, two bearings and the moulding of reducer shell integrally casting.Two bearing symmetries are positioned at the left and right sides of reducer shell one end, and described diff 2 is between two bearing 1a, and diff 2 housings are supported in two bearing 1a rotationally.
Described reducer shell has the cavity that retarder is installed, the second driven gear 3 circumferentially is fixed on diff 2 housings, the second driven gear can bolt be fixed, is riveted fixing or is weldingly fixed on the differential casing, in the present embodiment, the second driven gear and reducer shell bolt are fixed, so that safeguard and replacing.Be provided with a transmission shaft 4 in the reducer shell 1, the axis of this transmission shaft 4 is parallel with the second driven gear 3 axis, and the two ends of transmission shaft are supported in reducer shell rotationally by bearing.Since the main bearing radial force of transmission shaft, the Selection of Bearings deep groove ball bearing at transmission shaft two ends, and cost is more cheap.Circumferentially be fixed with the first driven gear 5 and the second driving gear 6 on the described transmission shaft 4, the second driving gear 6 and 3 engagements of the second driven gear, the middle part of transmission shaft is provided with outer spline section, the first driven gear and the second driving gear are provided with female splines, and the first driven gear, the second driving gear are connected with splined driveshaft.One side of described reducer shell is provided with the axis hole for the rotor shaft that transmission shaft and alternating current dynamo are installed, so that insert the rotor shaft of transmission shaft and alternating current dynamo, can also conveniently inject lubricating oil.The axis hole that the rotor shaft 10a of transmission shaft 4 and alternating current dynamo is installed is provided with roller bearing end cap 17, stops the foreign matter such as dust to invade the raceway of rolling body, can also guarantee that lubricant only works to rolling body and raceway and do not overflow.Described roller bearing end cap is the caulking gum lid, and assembling and anti-foreign matter effect all are better than the steel roller bearing end cap, and be also durable than steel roller bearing end cap, good sealing effect, and noise is low, and is difficult for stuck.
Described reducer shell 1 one sides are provided with the end face 1b that is connected and fixed alternating current motor stator core 11, and the described end face that is connected and fixed alternating current motor stator core is the rectangle end face with centre hole, and four angles of this end face are equipped with for the mounting hole that connects.This end face is provided with for Stator Windings of AC Motor 9, the AC motor rotor 10 local cavitys 7 that insert, and the base plate of described cavity is used for separating motor and retarder.Described Stator Windings of AC Motor is three phase windings, and three phase windings can improve motor performance, exports larger power, and brush is not set, and is more durable.The pig-tail wire of Stator Windings of AC Motor is stretched out rear side housing.The bottom of described cavity 7 is provided with the axis hole 8 that the rotor shaft 10a for alternating current dynamo passes, described alternating current motor stator core 11 1 ends are fixedly connected on the end face 1b that is connected and fixed alternating current motor stator core 11 of reducer shell 1, the other end of alternating current motor stator core 11 connects rear side housing 12, the outer peripheral face of described alternating current motor stator core is rectangle, and four angles of alternating current motor stator core are equipped with for the axial mounting hole that connects.The end face of rear side housing is the rectangle end face with centre hole, and four angles of this end face are equipped with for the mounting hole that connects.Described rear side housing 12, alternating current motor stator core 11 and reducer shell 1 run through fixing by a plurality of bolts 13 in the lump, in the present embodiment, state rear side housing, alternating current motor stator core and reducer shell and captive joint by four overbolts.Rotor shaft 10a one end of described alternating current dynamo is supported in rear side housing 12 rotationally, the other end passes the axis hole 8 of cavity 7 bottoms, be supported in rotationally reducer shell 1, described rear side housing is provided with the flange for the rotor shaft that supports alternating current dynamo, is provided with bearing between the rotor shaft of alternating current dynamo and the flange of rear side housing.Since the main bearing radial force of rotor shaft of alternating current dynamo, the Selection of Bearings deep groove ball bearing at the rotor shaft two ends of alternating current dynamo, and cost is more cheap.Gap between the axis hole 8 of described cavity 7 bottoms and the rotor shaft 10a of alternating current dynamo enters and damages alternating current dynamo with oil sealing 14 sealings to prevent the lubricant in the retarder.The inner chamber of described rear side housing is provided with tachogen 16, and this tachogen 16 is fixed on the rear side housing between the rotor shaft and rear side housing of alternating current dynamo.The pig-tail wire of tachogen 16 is stretched out rear side housing.With the rotating speed of Measurement accuracy motor, receive signal for the driver by frequency-variable controller, to handle.Circumferentially fix the first driving gear 15 on the rotor shaft 10a of described alternating current dynamo, described the first driving gear 15 and 5 engagements of the first driven gear.Described the first driving gear is provided with female splines, and the rotor shaft of alternating current dynamo is provided with male splines, the first driving gear and machine shaft spline joint.
Described diff comprises differential casing 21, semi-axle bevel gear 22, bevel planet gear 23, planet axis 24, and the two ends of differential casing 21 are provided with axle sleeve 211, described differential casing and the moulding of axle sleeve integrally casting.The axle sleeve 211 at differential casing 21 two ends is supported in two bearings rotationally by bearing, since the main bearing radial force of axle sleeve of differential casing, the Selection of Bearings deep groove ball bearing of differential casing two ends axle sleeve, and cost is more cheap.Semi-axle bevel gear 22 of each free-running fit in the axle sleeve 211 at differential casing 21 two ends, the motion of axle sleeve and semi-axle bevel gear does not interfere.Described semi-axle bevel gear 22 be provided with for the circumferential fixing internal splined hole of semiaxis, thereby the power of motor is sent to back axle.Be provided with thrust washer 25 between the axle sleeve 211 of described differential casing 21 and the semi-axle bevel gear 22, described thrust washer is axially fixed at the rotating shaft end of semi-axle bevel gear, prevents the aft end face contact axle sleeve of semi-axle bevel gear, friction occurs cause wearing and tearing.Be fixed with one in the differential casing 21 perpendicular to the planet axis 24 of semi-axle bevel gear 22, in the mounting hole that the two ends of planet axis insertion differential casing side face is provided with, described planet axis 24 is bolted to connection on differential casing 21.The a pair of symmetrical planetary wheel of axial restraint on this planet axis 24, planet axis is provided with for the planetary annular groove of axial restraint, and two planetary wheels mesh with two semi-axle bevel gears 22 respectively.Be provided with spherical pad 26 between described planetary wheel and the differential casing 21.Described spherical pad is axially fixed in planetary rear end, prevents planetary wheel contact differential casing, friction occurs cause wearing and tearing.
The flange that this back axle Electronmotive Force actuating device is provided with by the base rear end that diff is installed and the axle housing bolt of back axle are fixed, two output axle shaft spline joints of the semi-axle bevel gear of diff and back axle, thus the power of motor is sent to back axle.The motor of this back axle Electronmotive Force actuating device is electrically connected with frequency-variable controller, uses frequency-variable controller as speed regulation device, realizes stepless time adjustment, realizes any output speed.Frequency-variable controller is electrically connected with the 60v dc battery jar, and the direct current (DC) of storage battery output is converted to alternating current by frequency-variable controller, uses for alternating current dynamo.In the present embodiment, select the alternating current dynamo power of 3kw, use frequency converter to realize the horsepower output of 0~12kw.The rotating speed of tachogen Measurement accuracy motor receives signal for the driver by frequency-variable controller, to handle.In the battery-driven car operational process, because retarder and drive motor are combined as a whole, stator core is directly exposed, and in the battery-driven car driving process, the heat that stator core produces is taken away by wind outside, and radiating effect is greatly improved, and prolonged service life.
The present invention not only is confined to above-described embodiment, in the situation that do not deviate from the technical scheme that the technical solution of the present invention spirit is carried out a little change, should fall into protection scope of the present invention.

Claims (8)

1. the back axle Electronmotive Force actuating device of a battery-driven car, comprise reducer shell, described reducer shell is provided with for two bearings that diff is installed, described diff is between two bearings, differential casing is supported in two bearings rotationally, the second driven gear circumferentially is fixed on the differential casing, be provided with a transmission shaft in the reducer shell, the axis of this transmission shaft and the second driven gear shaft line parallel, circumferentially be fixed with the first driven gear and the second driving gear on the described transmission shaft, the second driving gear and the engagement of the second driven gear, it is characterized in that: described reducer shell one side is provided with the end face that is connected and fixed alternating current motor stator core, this end face is provided with for Stator Windings of AC Motor, the local cavity that inserts of AC motor rotor, the bottom of described cavity is provided with the axis hole that the rotor shaft for alternating current dynamo passes, this end face of one end connection reducer housing of alternating current motor stator core, the other end of alternating current motor stator core connects rear side housing, described rear side housing, alternating current motor stator core and reducer shell are fixed by a plurality of bolt-throughs in the lump, rotor shaft one end of described alternating current dynamo is supported in rear side housing rotationally, the other end passes the axis hole of cavity bottom, and the first driving gear of circumferentially fixing, described the first driving gear and the first driven gear mesh the gap oil sealing sealing between the rotor shaft of the axis hole of described cavity bottom and alternating current dynamo, described Stator Windings of AC Motor is three phase windings, and the pig-tail wire of three phase windings is stretched out rear side housing.
2. the back axle Electronmotive Force actuating device of battery-driven car according to claim 1, it is characterized in that: the inner chamber of described rear side housing is provided with tachogen, this tachogen is between the rotor shaft and rear side housing of alternating current dynamo, and the pig-tail wire of tachogen is stretched out rear side housing.
3. the back axle Electronmotive Force actuating device of battery-driven car according to claim 1, it is characterized in that: described the first driving gear is provided with female splines, and the rotor shaft of alternating current dynamo is provided with male splines, the first driving gear and machine shaft spline joint.
4. the back axle Electronmotive Force actuating device of battery-driven car according to claim 1, it is characterized in that: a side of described reducer shell is provided with the axis hole for the rotor shaft that transmission shaft and alternating current dynamo are installed, and the axis hole that the rotor shaft of transmission shaft and alternating current dynamo is installed is provided with roller bearing end cap.
5. the back axle Electronmotive Force actuating device of battery-driven car according to claim 1, it is characterized in that: described diff comprises differential casing, semi-axle bevel gear, bevel planet gear, planet axis, the two ends of differential casing are provided with axle sleeve, the axle sleeve at differential casing two ends is supported in two bearings rotationally by bearing, semi-axle bevel gear of each free-running fit in the axle sleeve at differential casing two ends, described semi-axle bevel gear be provided with for the circumferential fixing internal splined hole of semiaxis, be fixed with one in the differential casing perpendicular to the planet axis of semi-axle bevel gear, the a pair of symmetrical planetary wheel of axial restraint on this planet axis, two planetary wheels mesh with two semi-axle bevel gears respectively.
6. the back axle Electronmotive Force actuating device of battery-driven car according to claim 5 is characterized in that: be provided with thrust washer between the axle sleeve of described differential casing and the semi-axle bevel gear.
7. the back axle Electronmotive Force actuating device of battery-driven car according to claim 5, it is characterized in that: described planet axis is bolted to connection on differential casing.
8. the back axle Electronmotive Force actuating device of battery-driven car according to claim 5 is characterized in that: be provided with spherical pad between described planetary wheel and the differential casing.
CN201310050218.3A 2013-02-08 2013-02-08 The back axle Electronmotive Force actuating device of battery-driven car Active CN103072476B (en)

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CN104354590A (en) * 2014-10-15 2015-02-18 华晨汽车集团控股有限公司 Electric driving transmission system for electric vehicle
CN106523672A (en) * 2016-12-01 2017-03-22 徐州科源液压股份有限公司 Rear axle one-piece type speed reducer
CN106740076A (en) * 2017-01-13 2017-05-31 北京新能源汽车股份有限公司 A kind of power assembly and electric automobile
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CN112193043A (en) * 2020-09-30 2021-01-08 西门子电动汽车动力总成系统(上海)有限公司 Electric drive assembly system and vehicle
WO2021042467A1 (en) * 2019-09-03 2021-03-11 精进电动科技股份有限公司 Fixing structure for auxiliary bearing of electric drive assembly, and electric drive assembly

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WO2021042467A1 (en) * 2019-09-03 2021-03-11 精进电动科技股份有限公司 Fixing structure for auxiliary bearing of electric drive assembly, and electric drive assembly
CN112193043A (en) * 2020-09-30 2021-01-08 西门子电动汽车动力总成系统(上海)有限公司 Electric drive assembly system and vehicle

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