CN114475220A - Coaxial three-in-one electric drive system, integrated chassis structure and new energy automobile - Google Patents
Coaxial three-in-one electric drive system, integrated chassis structure and new energy automobile Download PDFInfo
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- CN114475220A CN114475220A CN202111584924.7A CN202111584924A CN114475220A CN 114475220 A CN114475220 A CN 114475220A CN 202111584924 A CN202111584924 A CN 202111584924A CN 114475220 A CN114475220 A CN 114475220A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a coaxial three-in-one electric drive system, an integrated chassis structure and a new energy automobile, which comprise a motor, a gearbox and a motor controller, wherein the motor, the gearbox and the motor controller are arranged along the same axis, and the motor is positioned between the gearbox and the motor controller; a first central through hole is formed in the motor controller, and a second central through hole is formed in a rotating shaft of the motor; the gearbox comprises a first output half shaft, a second output half shaft and a differential mechanism, one end of the first output half shaft penetrates through the second central through hole and the first central through hole and then is connected with a first wheel, and the other end of the first output half shaft is connected with the differential mechanism; one end of the second output half shaft is connected with the differential, and the other end of the second output half shaft is connected with a second wheel.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to a coaxial three-in-one electric driving system, an integrated chassis structure and a new energy automobile.
Background
With the rapid development of the new energy vehicle industry, the requirements of the electric drive system assembly on high power density, high torque density and high integration degree are higher and higher.
The pure electric vehicle skateboard chassis is higher and higher in the requirement on the integration level of an electric driving system, the integration level is high, the small electric driving system can improve the available space of the chassis, the space in the whole vehicle cabin is improved, the comfort level of passengers is improved, meanwhile, the available arrangement space of a battery is increased, and the maximum cruising ability of a vehicle can be improved.
In the prior art, the current mainstream electric drive systems are a parallel-axis electric drive system and a coaxial electric drive system, the motor controller of the currently known coaxial electric drive system is generally integrated on the side surface or the right top of the motor, and the space in the direction of X, Z cannot be minimized.
Disclosure of Invention
The invention provides a coaxial three-in-one electric driving system, an integrated chassis structure and a new energy automobile, and aims to solve the problem that the space of the conventional coaxial electric driving system cannot be minimized.
The invention provides a coaxial three-in-one electric drive system which comprises a motor, a gearbox and a motor controller, wherein the motor, the gearbox and the motor controller are arranged along the same axis, and the motor is positioned between the gearbox and the motor controller;
a first central through hole is formed in the motor controller, and a second central through hole is formed in a rotating shaft of the motor;
the gearbox comprises a first output half shaft, a second output half shaft and a differential mechanism, one end of the first output half shaft penetrates through the second central through hole and the first central through hole and then is connected with a first wheel, and the other end of the first output half shaft is connected with the differential mechanism;
one end of the second output half shaft is connected with the differential, and the other end of the second output half shaft is connected with a second wheel.
Optionally, the motor controller comprises a motor controller housing, the motor comprises a motor housing, and the gearbox comprises a gearbox housing; the motor controller housing is integrated with the motor housing.
Optionally, the motor is cylindrical, the transmission mechanism of the gearbox is of a planetary gear structure, the gearbox shell is cylindrical, and the cross section of the motor controller is of an annular structure; the motor controller, the motor and the gearbox form an integrated cylindrical structure.
Optionally, the transmission case includes a sun gear, a planet carrier, and an inner gear ring, the sun gear is in interference connection with a rotating shaft of the motor, the planet gear is in meshing connection with the sun gear, the planet carrier is connected with the planet gear, the inner gear ring is in meshing connection with the planet gear, and the inner gear ring is disposed on an inner circumferential surface of the transmission case body.
Optionally, the differential includes a differential case, and the differential case is integrally connected with the planet carrier; the differential receives the torque and the rotating speed transmitted by the planet carrier through the differential shell and transmits the torque and the rotating speed to the first output half shaft and the second output half shaft.
Optionally, the motor controller includes a plurality of power device modules, and the power device modules are uniformly distributed on the inner circumferential surface of the motor controller housing.
Optionally, the typical number of the power device modules is three, and the three power device modules are uniformly arranged on the inner circumferential surface of the motor controller casing in a triangular shape.
Optionally, the transmission case further includes a first bearing and a second bearing, the first bearing is disposed on the motor controller housing and is used for supporting the first output half shaft; the second bearing is arranged on the gearbox shell and is used for supporting the second output half shaft.
Optionally, the outer end faces of the first bearing and the second bearing are both provided with oil seals.
Optionally, the motor includes a motor stator and a motor rotor, a third central through hole is formed in the center of the motor rotor, a fourth central through hole is formed in the center of the motor stator, a rotating shaft of the motor penetrates through the third central through hole, the motor rotor penetrates through the fourth central through hole, and the motor stator is arranged on the inner circumferential surface of the motor housing.
Optionally, the motor further includes a third bearing and a fourth bearing disposed in the motor housing, and the third bearing and the fourth bearing are respectively used for supporting two ends of the rotating shaft of the motor.
Optionally, coaxial trinity electric drive system still includes the DC power supply input, the DC power supply input is located the outer peripheral face of machine controller casing.
A second aspect of the present invention provides an integrated chassis structure comprising the above-described coaxial three-in-one electric drive system.
A third aspect of the invention provides a new energy automobile, which comprises the integrated chassis structure.
According to the coaxial three-in-one electric drive system, the integrated chassis structure and the new energy automobile, the motor, the gearbox and the motor controller are arranged along the same axis, the motor is located between the gearbox and the motor controller, the space in the Y direction in a space coordinate system is fully utilized, and the space minimization in the X, Z direction is realized.
In the alternative scheme of the invention, the motor is cylindrical, the gearbox is cylindrical, and the cross section of the motor controller is of an annular structure, so that the coaxial three-in-one electric drive system forms an integrated cylindrical structure, the structural layout is more compact, and the overall space is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a first schematic structural diagram of a coaxial three-in-one electric drive system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a coaxial three-in-one electric drive system according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a coaxial three-in-one electric drive system according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a coaxial three-in-one electric drive system according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a coaxial three-in-one electric drive system according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram six of a coaxial three-in-one electric drive system in accordance with an embodiment of the present invention;
FIG. 7 is a seventh schematic structural diagram of a coaxial three-in-one electric drive system according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an integrated chassis structure in accordance with an embodiment of the present invention;
FIG. 9 is a schematic diagram of an offset in-line electric drive system according to an embodiment of the present invention;
fig. 10 is a structural schematic diagram eight of the coaxial three-in-one electric driving system according to an embodiment of the present invention.
Description of reference numerals:
1-a motor controller;
101-a motor controller housing;
102-power device module;
103-a first power device module;
1031-a drive and control circuit board;
1032-power devices;
1033-capacitance;
104-a second power device module;
105-a third power device module;
106-central through hole;
2, a motor;
201-a motor stator;
202-a motor rotor;
203-a rotating shaft of the motor;
204-motor housing;
205-a third bearing;
206-a position sensor;
207-a fourth bearing;
3-a gearbox;
301-a first output half shaft;
302-a second output half shaft;
303-planet wheel;
304-ring gear;
305-a planet carrier;
306-a sun gear;
307-differential gear;
308-a first bearing;
309-a second bearing;
310 — input bearing;
311-a first oil seal;
312-a second oil seal;
313-a transmission housing;
314 — input shaft;
315-first stage gear set;
316-second stage gear set;
317-intermediate shaft;
4-a first wheel;
5-a second wheel;
6-a direct current power supply input end;
7-power battery.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "upper surface", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, "a plurality" means a plurality, e.g., two, three, four, etc., unless specifically limited otherwise.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and the like are to be construed broadly, e.g., as meaning fixedly attached, detachably attached, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The technical solution of the present invention will be described in detail below with specific examples. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Referring to fig. 1, the present invention provides a coaxial three-in-one electric driving system, which includes a motor 2, a gearbox 3 and a motor controller 1, wherein the motor 2, the gearbox 3 and the motor controller 1 are arranged along a same axis, and the motor 2 is located between the gearbox 3 and the motor controller 1;
a first central through hole is formed in the motor controller 1, and a second central through hole is formed in a rotating shaft of the motor;
the gearbox 3 comprises a first output half shaft 301, a second output half shaft 302 and a differential, one end of the first output half shaft 301 passes through the second central through hole and the first central through hole and then is connected with the first wheel 4, and the other end of the first output half shaft 301 is connected with the differential;
one end of the second output half shaft 302 is connected to the differential, and the other end of the second output half shaft 302 is connected to the second wheel 5.
For example, the motor controller 1 may be an inverter with a PWM control function, but the invention is not limited thereto, and other types of motor controllers or integrated power electronic devices are also within the protection scope of the invention.
In one embodiment, the coaxial three-in-one electric drive system may be disposed between two wheels at the front of the vehicle and/or two wheels at the rear of the vehicle;
in a specific embodiment, the coaxial three-in-one electric driving system is provided with a motor 2, and the motor controller 1 is used for controlling the rotation of a rotating shaft of the motor 2; the motor 2 generates a motor torque and a motor rotation speed, and transmits the motor torque and the motor rotation speed to the gearbox 3, the gearbox 3 amplifies the motor torque, reduces the motor rotation speed, and transmits the amplified motor torque and the reduced motor rotation speed to the first wheel 4 through the first output half shaft 301, so as to control torque increase or speed reduction of the first wheel 4; similarly, the transmission 3 transmits the amplified motor torque and the reduced motor speed to the second wheel 5 through the second output axle shaft 302, so as to control the torque increase or speed reduction of the second wheel 5.
The coaxial three-in-one electric drive system provided by the invention has the advantages that the motor 2, the gearbox 3 and the motor controller 1 are arranged along the same axis, the motor 2 is positioned between the gearbox 3 and the motor controller 1, the space in the Y direction in a space coordinate system is fully utilized, the space minimization in the direction of X, Z is realized, in addition, the coaxial three-in-one electric drive system adopts two output half shafts (specifically, a first output half shaft 301 and a second output half shaft 302) and a differential mechanism, the two output half shafts are connected through the differential mechanism, and the fact that the differential mechanism can transmit torque to two wheels through the two output half shafts is realized, and the space minimization is realized. Specifically, referring to fig. 6 and 7, the coaxial three-in-one electric drive system can be regarded as a space coordinate system, the extending direction of the first output half shaft 301 and the second output half shaft 302 is the Y direction of the space coordinate system, and the motor 2, the gearbox 3 and the motor controller 1 are coaxially arranged along the Y direction, so as to achieve space minimization in the direction of X, Z.
Referring to fig. 2, the motor controller 1 includes a motor controller housing 101, the motor 2 includes a motor housing 204, and the transmission 3 includes a transmission housing 313; the motor controller housing 101 is integrated with the motor housing 204.
The integrated integration may be characterized in that the motor controller housing 101, the motor housing 204 and the transmission housing 313 are connected to form a whole.
In an example, the integration may be welding the motor controller housing 101, the motor housing 204 and the transmission housing 313 into a whole.
In another example, the integrated integration may be that the motor controller housing 101, the motor housing 204 and the transmission housing 313 are connected into a whole by means of bolts.
In other examples, the integration may be a process of integrally casting the motor controller housing 101, the motor housing 204 and the transmission housing 313 to form a whole.
Of course, the present invention is not limited thereto, and other connection manners of the motor controller housing, the motor housing and the transmission housing are also within the protection scope of the present invention.
In a specific embodiment, the motor controller housing 101 and the motor housing 204 are integrally connected to share the housing, and the motor housing 204 and the transmission housing 313 are integrally connected to share the housing, so that the occupied space of the coaxial multi-motor drive system can be reduced.
Referring to fig. 2, the motor 2 is cylindrical, the transmission mechanism of the transmission case 3 is a planetary gear structure, the transmission case 313 is cylindrical, and the cross section of the motor controller 1 is an annular structure; the motor controller 1, the motor 2 and the gearbox 3 form an integrated cylindrical structure; so that the structure is more compact and the space is further saved.
Wherein the torque and the rotational speed of the rotating shaft of the motor 2 are amplified by the planetary gear structure. Referring to fig. 2 specifically for the planetary gear structure, the transmission 3 includes a sun gear 306, planet gears 303, a planet carrier 305, and an inner gear 304, the sun gear 306 is in interference connection with a rotating shaft of the motor, the planet gears 303 are in meshing connection with the sun gear 306, the planet carrier 305 is connected with the planet gears 303, the inner gear 304 is in meshing connection with the planet gears 303, and the inner gear 304 is disposed on an inner circumferential surface of the transmission housing 313.
The matching relation between the planetary gear structure and the motor can be achieved in the following modes:
in one example, the sun gear 306 is directly machined on the rotating shaft of the motor 2 during the machining process, so that the sun gear 306 is integrated with the rotating shaft of the motor 2.
In another example, the sun gear 306 and the rotating shaft of the motor 2 may also be connected by a spline.
In other examples, the sun gear 306 and the rotating shaft of the motor 2 may also be connected in a gear engagement manner.
Of course, the present invention is not limited thereto, and other matching manners of the sun gear and the rotating shaft of the motor are also within the protection scope of the present invention.
The working principle of the planetary gear structure is specifically as follows: the sun gear 306 is configured to receive torque and rotation speed generated by a rotating shaft of the motor 2 and start to rotate, the planet gears 303 can be controlled to rotate around the sun gear 306, the planet carrier 305 is configured to fix a movement direction between the sun gear 306 and the planet gears 303, and the inner gear ring 304 is configured to fix the planet gears 303.
It will of course be appreciated that the planetary gear arrangement described above is only one example of a gearbox 3 according to the invention and the invention is not limited thereto. Other configurations of the transmission are also within the scope of the present invention, for example, referring to fig. 9, the transmission 3 may be configured as an offset coaxial structure; the motor torque and the rotation speed are increased or reduced in one step through the engagement of a first-stage gear pair 315 between an input shaft 314 and a middle shaft 317, increased or reduced in two steps through the engagement of the middle shaft 317 and a second-stage gear pair 316 between a first output half shaft 301 and a second output half shaft 302, and finally transmitted to the first wheel 4 and the second wheel 5 through a differential 307, wherein the input shaft 314 is coaxial with the first output half shaft 301 and the second output half shaft 302, and the middle shaft 317 is arranged in offset parallel with the input shaft 314, the first output half shaft 301 and the second output half shaft 302. The differential 307 connects the first output half shaft 301 and the second output half shaft 302, and passes through the motor 2 and the motor controller 1.
Referring to fig. 2, the differential 307 includes a differential case integrally connected with the carrier 305; the differential 307 receives the torque and rotational speed transmitted by the carrier 305 through the differential case and transmits the torque and rotational speed to the first output half shaft 301 and the second output half shaft 302.
In operation, the differential 307 receives the torque and rotational speed transmitted by the planetary gear structure through the differential case and transmits the torque and rotational speed to the first output half shaft 301 and the second output half shaft 302.
In a preferred embodiment, referring to fig. 2, in order to increase the stability of the system, the transmission further includes a first bearing 308 and a second bearing 309, the first bearing 308 is disposed on the motor controller casing 101 and is used for supporting the first output half shaft 301; the second bearing 309 is disposed on the transmission housing 313 and is used to support the second output half shaft 309.
In addition, in a specific embodiment, the transmission 3 further includes an input shaft and an input bearing 310, the input shaft is connected to the rotating shaft 203 of the motor and the sun gear 306 to drive the sun gear 306 to rotate, so as to drive the planetary gear structure to operate, and the input bearing 310 is used for supporting the input shaft.
With continued reference to fig. 2, in order to improve the stability of the system, oil seals are disposed on the outer end surfaces of the first bearing 308 and the second bearing 309; in a specific embodiment, the oil seal comprises a first oil seal 311 and a second oil seal 312, the first oil seal 311 is disposed on the outer end surface of the first bearing 308, the second oil seal 312 is disposed on the outer end surface of the second bearing 309, the oil seal is used for isolating the components (such as the rotating shaft 203 and the planetary gear structure of the motor) which need to be lubricated in the electric drive system from the output component (such as the wheel), so as to prevent the leakage of the lubricating oil, and simultaneously, the oil seal can prevent the external impurities from entering the coaxial three-in-one electric drive system, thereby affecting the operation of the three-in-one electric drive system.
The oil seal can be made of nitrile rubber, fluororubber, silicone rubber, acrylate rubber, polyurethane and polytetrafluoroethylene.
Referring to fig. 3 for the motor controller 1, the motor controller 1 includes a plurality of power device modules, and the power device modules are uniformly distributed on an inner circumferential surface of the motor controller casing 101.
Regarding the arrangement of the power device modules 102 in the motor controller 1, in one embodiment, the typical number of the power device modules is three, and three power device modules are uniformly arranged on the inner circumferential surface of the motor controller casing 101 in a triangular shape. Specifically, the power device modules include a first power device module 103, a second power device module 104, and a third power device module 105.
The first power device module comprises a driving and control circuit board 1031, a power device 1032 and a capacitor 1033, wherein the power device 1032 is arranged on the outer end face of the driving and control circuit board 1031, and the capacitor 1033 is connected with the power device 1032; the long side of the first power device module is used as a first side of the triangle, the long side of the second power device module is used as a second side of the triangle, and the long side of the third power device module is used as a third side of the triangle.
For example, the power device 1032 may be a three-phase IGBT or MOSFET half-bridge power module. Of course, the invention is not limited thereto, and other forms of power devices are also within the scope of the invention.
In another example, the power device module 102 includes an IGBT or MOSFET device, a capacitor, a water cooling plate, a connecting copper bar, a driving circuit, and a control circuit board. Of course, the invention is not limited thereto, and other components of the power device module are also within the scope of the invention.
In other examples, referring to fig. 10, regarding the driving and control circuit board 1031, the driving and control circuit board 1031 includes a central through hole 106, the central through hole 106 includes a first output half shaft 301 therein, an edge of the driving and control circuit board 1031 is connected to an inner circumferential surface of the motor controller housing 101, and the power device 1032 and the capacitor 1033 are disposed on a side of the driving and control circuit board 1031 along the Y direction
Referring to fig. 2, the motor 2 includes a motor stator 201 and a motor rotor 202, a third central through hole is formed in the center of the motor rotor 202, a fourth central through hole is formed in the center of the motor stator 201, a rotating shaft 203 of the motor passes through the third central through hole, the motor rotor 202 passes through the fourth central through hole, and the motor stator 201 is disposed on an inner circumferential surface of a motor housing 204.
The motor stator 201 is used for generating a rotating stator magnetic field, the motor rotor 201 generates a rotating rotor magnetic field, and the stator magnetic field and the rotor magnetic field interact with each other to finally drive the rotating shaft 203 of the motor to rotate.
In a specific embodiment, the motor 2 further comprises a position sensor 206, and the position sensor 206 is connected to the motor rotor 202 to detect the position of the motor rotor 202.
With reference to fig. 2, the motor 2 further includes a third bearing 205 and a fourth bearing 207 disposed in the motor housing 204, wherein the third bearing 205 and the fourth bearing 207 are respectively used for supporting two ends of the rotating shaft 203 of the motor.
Referring to fig. 4 and 5, the coaxial three-in-one electric driving system provided in the embodiment of the present invention further includes a dc power input terminal 6, where the dc power input terminal 6 is disposed on the outer peripheral surface of the motor controller casing 101.
With continued reference to fig. 8, the coaxial three-in-one electric drive system has the motor controller 1, the motor 2 and the transmission 3 disposed on the same axis, and when viewed from the cross section of the wheel, the height H1 of the coaxial three-in-one electric drive system and the length L1 of the integrated chassis structure are reduced, so as to provide more layout space for the vehicle, increase the layout space for the power battery under the condition of the same wheelbase (i.e., X1), and increase the driving range of the vehicle.
In addition, the embodiment of the invention also provides an integrated chassis structure which comprises the coaxial three-in-one electric drive system.
The integrated chassis structure in the embodiment of the present invention further includes a power battery 7, and the power battery 7 is integrated on the chassis structure, and may be specifically disposed in a space formed between the wheels. Specifically, for example, as shown in fig. 8, the power battery is disposed on an integrated chassis in the X direction of the space coordinate system. The power battery can be used as a direct current power source of the coaxial three-in-one electric drive system of the previous embodiment of the invention. Specifically, referring to fig. 8, the dc power input terminal 6 may be connected to the output terminal of the power battery 7 by using a dc bus interface. In use, the power battery 7 supplies power to the motor controller 1 through the dc power input 6 to start the motor 2, so as to generate torque and rotation speed, increase torque and reduce speed through the transmission 3, and finally transmit the torque and rotation speed to the first wheel 4 and the second wheel 5 through the first output half shaft 301 and the second output half shaft 302 by the differential 307 in the transmission 3.
In addition, the embodiment of the invention also provides a new energy automobile which comprises the integrated chassis structure.
In the description herein, reference to the terms "an implementation," "an embodiment," "a specific implementation," "an example" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. A coaxial three-in-one electric drive system is characterized by comprising a motor, a gearbox and a motor controller, wherein the motor, the gearbox and the motor controller are arranged along the same axis, and the motor is positioned between the gearbox and the motor controller;
a first central through hole is formed in the motor controller, and a second central through hole is formed in a rotating shaft of the motor;
the gearbox comprises a first output half shaft, a second output half shaft and a differential mechanism, one end of the first output half shaft penetrates through the second central through hole and the first central through hole and then is connected with a first wheel, and the other end of the first output half shaft is connected with the differential mechanism;
one end of the second output half shaft is connected with the differential, and the other end of the second output half shaft is connected with a second wheel.
2. The coaxial three-in-one electric drive system of claim 1, wherein the motor controller includes a motor controller housing, the motor includes a motor housing, the transmission includes a transmission housing, and the motor controller housing is integrally integrated with the motor housing.
3. The coaxial three-in-one electric drive system of claim 2, wherein the motor is cylindrical, the transmission mechanism of the gearbox is a planetary gear structure, the gearbox housing is cylindrical, and the cross section of the motor controller is an annular structure; the motor controller, the motor and the gearbox form an integrated cylindrical structure.
4. The coaxial three-in-one electric drive system of claim 3, wherein the transmission case comprises a sun gear, a planetary carrier and an inner gear ring, the sun gear is in interference connection with a rotating shaft of the motor, the planetary gear is in meshing connection with the sun gear, the planetary carrier is connected with the planetary gear, the inner gear ring is in meshing connection with the planetary gear, and the inner gear ring is arranged on the inner circumferential surface of the transmission case.
5. The coaxial three-in-one electric drive system of claim 4, wherein the differential includes a differential housing integrally connected with the planet carrier; the differential receives the torque and the rotating speed transmitted by the planet carrier through the differential shell and transmits the torque and the rotating speed to the first output half shaft and the second output half shaft.
6. The coaxial three-in-one electric drive system of claim 2, wherein the motor controller comprises a plurality of power device modules uniformly distributed about an inner periphery of the motor controller housing.
7. The coaxial three-in-one electric drive system of claim 6, wherein the typical number of the plurality of power device modules is three, and three power device modules are uniformly arranged on the inner circumferential surface of the motor controller housing in a triangular shape.
8. The coaxial three-in-one electric drive system of claim 2, wherein said transmission further comprises a first bearing, a second bearing, said first bearing disposed on said motor controller housing and adapted to support said first output half shaft; the second bearing is arranged on the gearbox shell and is used for supporting the second output half shaft.
9. The coaxial three-in-one electric drive system of claim 8, wherein an oil seal is disposed on an outer end surface of each of the first and second bearings.
10. The coaxial three-in-one electric drive system as claimed in claim 2, wherein the motor comprises a motor stator and a motor rotor, a third central through hole is formed in the center of the motor rotor, a fourth central through hole is formed in the center of the motor stator, the rotating shaft of the motor penetrates through the third central through hole, the motor rotor penetrates through the fourth central through hole, and the motor stator is arranged on the inner circumferential surface of the motor housing.
11. The coaxial three-in-one electric drive system of claim 10, wherein the motor further comprises a third bearing and a fourth bearing disposed in the motor housing, the third bearing and the fourth bearing being respectively used for supporting two ends of the rotation shaft of the motor.
12. The coaxial three-in-one electric drive system of claim 2, further comprising a dc power input disposed on an outer peripheral surface of the motor controller housing.
13. An integrated chassis structure comprising the coaxial three-in-one electric drive system of any one of claims 1-12.
14. A new energy automobile, characterized by comprising the integrated chassis structure of claim 13.
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| CN202111584924.7A CN114475220A (en) | 2021-12-22 | 2021-12-22 | Coaxial three-in-one electric drive system, integrated chassis structure and new energy automobile |
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| CN202111584924.7A CN114475220A (en) | 2021-12-22 | 2021-12-22 | Coaxial three-in-one electric drive system, integrated chassis structure and new energy automobile |
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| CN202111584924.7A Pending CN114475220A (en) | 2021-12-22 | 2021-12-22 | Coaxial three-in-one electric drive system, integrated chassis structure and new energy automobile |
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