CN114312266A - Coaxial integrated electric drive system, transmission and automobile - Google Patents
Coaxial integrated electric drive system, transmission and automobile Download PDFInfo
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- CN114312266A CN114312266A CN202011063772.1A CN202011063772A CN114312266A CN 114312266 A CN114312266 A CN 114312266A CN 202011063772 A CN202011063772 A CN 202011063772A CN 114312266 A CN114312266 A CN 114312266A
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention belongs to the technical field of electric automobiles, and particularly relates to a coaxial integrated electric drive system and an electric automobile. The coaxial integrated electric drive system comprises an integrated shell, a motor assembly, a speed reducer assembly and an air-conditioning compressor; a motor mounting hole, a speed reducer mounting hole and a compressor mounting hole are formed in the integrated shell in a recessed mode; the integrated shell is also provided with a first through hole for communicating the motor mounting hole and the speed reducer mounting hole; the output shaft of the motor assembly penetrates through the first through hole from the motor mounting hole and extends into the speed reducer mounting hole, and the speed reducer assembly comprises a driving gear which is located in the speed reducer mounting hole and is sleeved on the output shaft of the motor assembly. In the invention, the driving gear of the speed reducer assembly is arranged on the output shaft of the motor, so that the integration level, the compactness and the reliability of the coaxial integrated electric drive system are improved, and the NVH performance of an automobile is improved.
Description
Technical Field
The invention belongs to the technical field of electric automobiles, and particularly relates to a coaxial integrated electric drive system and an electric automobile.
Background
The electric drive system is a core component of an electric automobile, and with the continuous development of new energy automobiles, the arrangement requirement of the automobile drive system is higher. The electric drive system is formed by combining a drive motor, a motor controller, a speed changer, an air compressor, a water pump, a vehicle controller, a vehicle-mounted charger, a direct current converter and the like. In the prior art, an integrated control shell of an electric drive system is usually installed at the top of a stator shell of a drive motor, a transmission is installed at the output shaft end of the drive motor, and an air compressor is hung on the transmission through a bracket; however, such an integrated electric drive system has the disadvantages of heavy overall weight, low integration level, large housing space, high costs for molds and materials, and the like.
Disclosure of Invention
The invention solves the technical problems of low integration level, large shell space and the like of an electric drive system in the prior art, and provides a coaxial integrated electric drive system and an electric automobile.
In view of the above problems, an embodiment of the present invention provides a coaxial integrated electric driving system, which includes an integrated housing, a motor assembly, a reducer assembly, and an air conditioning compressor;
a motor mounting hole for mounting the motor assembly and a compressor mounting hole for mounting the air-conditioning compressor are formed in the first side of the integrated shell in a recessed mode; a second side of the integrated shell, which is far away from the first side, is sunken to form a speed reducer mounting hole for mounting the speed reducer assembly; the integrated shell is also provided with a first through hole for communicating the motor mounting hole and the speed reducer mounting hole; the output shaft of the motor assembly penetrates through the first through hole from the motor mounting hole and extends into the speed reducer mounting hole, and the speed reducer assembly comprises a driving gear which is located in the speed reducer mounting hole and is sleeved on the output shaft of the motor assembly.
Optionally, the coaxial integrated electric drive system further comprises a control housing and a controller; the control shell is installed on the integrated shell, the controller is installed in the control shell, and the controller is connected with the motor assembly and the air conditioner compressor.
Optionally, the integrated shell is further provided with an electronic control accommodating groove located above the motor mounting hole and the compressor mounting hole; the integrated shell further comprises a mounting surface arranged above the speed reducer mounting hole, and the mounting surface is flush with the edge of the top of the electronic control accommodating groove; the mounting surface and the horizontal plane form a preset inclination angle.
Optionally, a water inlet, a water outlet, a first connecting hole, a second connecting hole and an electronic control cooling water channel for cooling the controller are arranged on the integrated shell; a motor cooling water channel is formed between the motor mounting hole and the motor assembly, and a compressor cooling water channel is formed between the air-conditioning compressor and the compressor mounting hole;
the water inlet intercommunication automatically controlled cooling water course, automatically controlled cooling water course is kept away from the one end intercommunication of water inlet first connecting hole, the one end intercommunication of automatically controlled cooling water course is kept away from to first connecting hole the motor cooling water course, the motor cooling water course is kept away from the one end intercommunication of first connecting hole the second connecting hole, the second connecting hole is kept away from the one end intercommunication of motor cooling water course the compressor cooling water course, the compressor cooling water course is kept away from the one end intercommunication of second connecting block the delivery port.
Optionally, the motor assembly includes a motor inner housing and a motor body mounted in the motor inner housing; the motor inner shell is arranged in the motor mounting hole, and a motor cooling water channel is formed between the motor inner shell and the inner wall of the motor mounting hole;
and a plurality of flow guide rib plates arranged along the circumferential direction of the output shaft of the motor body are arranged on the outer wall of the motor inner shell.
Optionally, a mounting groove for mounting the controller is formed in the control shell, and the edge of a notch of the mounting groove is connected with the edge of the top of the electronic control accommodating groove.
Optionally, the controller includes a dc bus, a capacitor module, an IGBT module, and a three-phase copper bar; the capacitor module, the IGBT module and the three-phase copper bar are all installed in the installation groove, and the direct-current bus is installed on the control shell; the capacitor module is connected with the automobile power battery through the direct current bus; the three-phase copper bar is connected with a three-phase terminal of the motor assembly;
the automobile power battery drives the motor assembly to rotate through the direct-current bus, the capacitor module, the IGBT module and the three-phase copper bar which are connected in sequence.
Optionally, the electronic control mounting groove comprises a first accommodating groove, a second accommodating groove and a third accommodating groove which are sequentially arranged at intervals; the first accommodating groove is used for accommodating the three-phase copper bar extending out of the mounting groove; the second accommodating groove is used for accommodating the IGBT module extending out of the mounting groove; the third accommodating groove is used for accommodating the capacitor module extending out of the mounting groove.
Optionally, a second through hole is further formed in the first accommodating groove, and the three-phase copper bar penetrates through the second through hole to be connected with a three-phase terminal of the motor assembly; the electric control cooling water channel is opposite to the second accommodating groove.
Optionally, the reducer assembly further comprises an intermediate shaft, an intermediate driving gear, an intermediate driven gear and an end cover; the end cover is sunken to form a first accommodating part and a second accommodating part communicated with the first accommodating part; the end cover is arranged on the position, opposite to the speed reducer mounting hole, of the second side of the integrated shell; the middle driving gear is positioned in the speed reducer mounting hole and meshed with the driving gear, the middle driven gear is positioned in the first accommodating part, and the middle driving gear and the middle driven gear are both arranged on the middle shaft;
the inner wall of the speed reducer mounting hole opposite to the second accommodating part is concavely provided with a third accommodating part, and two opposite ends of the intermediate shaft are respectively mounted in the second accommodating part and the third accommodating part.
Optionally, a fourth accommodating portion communicated with the first accommodating portion is further concavely formed on the end cover, and the coaxial integrated electric drive system further comprises a differential assembly; the differential assembly comprises a mounting plate, a differential and a differential gear connected with the differential; the mounting plate is mounted on the second side of the integrated shell and is arranged opposite to the speed reducer mounting hole, one end of the differential is mounted on the mounting plate, and the other end of the differential is mounted in the fourth accommodating part; the differential gear is located in the first accommodating portion and is meshed with the intermediate driven gear.
In the invention, the control shell is arranged on the integrated shell, the controller is arranged in the control shell and is connected with the motor assembly, and a motor mounting hole for mounting the motor assembly and a compressor mounting hole for mounting the air-conditioning compressor are formed in the first side of the integrated shell in a sunken manner; a second side of the integrated shell, which is far away from the first side, is sunken to form a speed reducer mounting hole for mounting the speed reducer assembly; therefore, the coaxial integrated electric drive system is integrated with the air conditioner compressor, the motor assembly and the speed reducer assembly, the connection of all parts through complex wire harnesses is avoided, the integration level, the compactness and the reliability of the coaxial integrated electric drive system are improved, and the mode of the integrated electric drive system and the NVH performance of an automobile are improved. In addition, the integrated shell is also provided with a first through hole for communicating the motor mounting hole and the speed reducer mounting hole; the output shaft of the motor assembly penetrates through the first through hole from the motor mounting hole and extends into the speed reducer mounting hole, and the driving gear of the speed reducer assembly is located in the speed reducer mounting hole and is sleeved on the output shaft of the motor assembly (namely, the driving gear and the motor assembly share one output shaft), so that the design of the driving shaft of the speed reducer is reduced, and the integration level of the coaxial integrated electric drive system is further improved.
The embodiment of the invention also provides an electric automobile which comprises the coaxial integrated electric drive system.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is an exploded view of a coaxial integrated electric drive system according to an embodiment of the present invention;
fig. 2 is a schematic assembly structure diagram of a coaxial integrated electric drive system according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an integrated housing of a coaxial integrated electric drive system according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an integrated housing of a coaxial integrated electric drive system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a partially exploded view of a coaxial integrated electric drive system according to an embodiment of the present invention;
FIG. 6 is a schematic view of the coolant flowing in the integrated housing according to one embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a coaxial integrated electric drive system provided in accordance with an embodiment of the present invention, wherein the controller and the control housing are mounted on the integrated housing;
FIG. 8 is a top view of an integrated housing of a coaxial integrated electric drive system provided in accordance with an embodiment of the present invention;
fig. 9 is a partial structural schematic view of a controller of the coaxial integrated electric drive system installed in a control housing according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a controller of the coaxial integrated electric drive system installed in a control housing according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. an integrated housing; 101. a first side; 102. a second side; 103. a motor mounting hole; 104. a reducer mounting hole; 105. a first through hole; 106. a compressor mounting hole; 107. an electric control accommodating groove; 1071. a first accommodating groove; 1072. a second accommodating groove; 1073. a third accommodating groove; 108. a mounting surface; 109. a water inlet; 110. a water outlet; 111. a first connection hole; 112. a second connection hole; 113. a second through hole; 114. an auxiliary hole; 115. a third receptacle portion; 2. a motor assembly; 21. a motor body; 22. a motor inner housing; 221. a flow guide rib plate; 3. a reducer assembly; 31. a driving gear; 32. an intermediate shaft; 33. a middle driving gear; 34 an intermediate driven gear; 35. an end cap; 351. a second receptacle portion; 352. a fourth receptacle portion; 353. a first receptacle portion; 4. a control housing; 41. mounting grooves; 5. a controller; 51. a direct current bus; 52. a capacitive module; 53. an IGBT module; 54. a three-phase copper bar; 55. a current sensor; 56. a drive plate; 6. an air conditioning compressor; 7. a differential assembly; 71. mounting a plate; 72. a differential mechanism; 73. a differential gear.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the 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, should not be construed as limiting the present invention.
In the present invention, in order to better show the structure of the coaxial integrated electric drive system and the connection relationship thereof, the "up" in the present invention means the direction pointing to the roof (i.e. above the coaxial integrated electric drive system shown in fig. 2); the "down" in the present invention means the direction actually pointing to the bottom of the vehicle (i.e. below the coaxial integrated electric drive system shown in fig. 2).
As shown in fig. 1 and fig. 2, a coaxial integrated electric driving system according to an embodiment of the present invention includes an integrated housing 1, a motor assembly 2, a reducer assembly 3, and an air conditioner compressor 6; a motor mounting hole 103 for mounting the motor assembly 2 and a compressor mounting hole 106 for mounting the air-conditioning compressor 6 are concavely formed on the first side 101 of the integrated shell 1; a second side 102 of the integrated shell 1, which is away from the first side 101, is concavely formed with a speed reducer mounting hole 104 for mounting the speed reducer assembly 3, and the integrated shell 1 is further provided with a first through hole 105 for communicating the motor mounting hole 103 with the speed reducer mounting hole 104; the output shaft of the motor assembly 2 passes through the first through hole 105 from the motor mounting hole 103 and extends into the reducer mounting hole 104, and the reducer assembly 3 includes a driving gear 31 located in the reducer mounting hole 104 and sleeved on the output shaft of the motor assembly 2. It is understood that the reducer assembly 3 further comprises an intermediate shaft 32, and an intermediate driving gear 33 and an intermediate driven gear 34 both mounted on the intermediate shaft 32, the intermediate driving gear 33 being engaged with the driving gear 31; therefore, the output shaft of the motor assembly 2 drives the automobile differential to rotate through the driving gear 31, the intermediate driving gear 33, the intermediate shaft 32 and the intermediate driven gear 34, and further drives the automobile wheels to rotate.
Further, through the structural design of the integrated shell 1, the motor assembly 2, the reducer assembly 3 and the air conditioner compressor 6 can be integrated together, the integration level of the coaxial integrated electric drive system is further improved, and the installation space of the motor assembly 2, the reducer assembly 3 and the air conditioner compressor 6 on the electric automobile is reduced.
In the invention, the control shell 4 is installed on the integrated shell 1, the controller 5 is installed in the control shell 4 and connected with the motor assembly 2, and a motor installation hole 103 for installing the motor assembly 2 and a compressor installation hole 106 for installing the air-conditioning compressor 6 are concavely formed on the first side 101 of the integrated shell 1; a second side 102 of the integrated shell 1, which is opposite to the first side 101, is concavely formed with a speed reducer mounting hole 104 for mounting the speed reducer assembly 3; therefore, the air-conditioning compressor 6, the motor assembly 2 and the speed reducer assembly 3 are integrated in the coaxial integrated electric drive system, connection among all parts through complex wire harnesses is avoided, the integration level, the compactness and the reliability of the coaxial integrated electric drive system are improved, and the mode of the integrated electric drive system and the NVH performance of an automobile are improved. In addition, the integrated shell 1 is also provided with a first through hole 105 for communicating the motor mounting hole 103 with the speed reducer mounting hole 104; the output shaft of the motor assembly 2 passes through the first through hole 105 from the motor mounting hole 103 and extends into the speed reducer mounting hole 104, and the driving gear of the speed reducer assembly 3 is located in the speed reducer mounting hole 104 and is sleeved on the output shaft of the motor assembly 2 (that is, the driving gear 31 and the motor assembly 2 share one output shaft), so that the design of the driving shaft of the speed reducer is reduced, and the integration level of the coaxial integrated electric drive system is further improved.
In an embodiment, as shown in fig. 3 and 4, the coaxial integrated electric drive system further comprises a control housing 4 and a controller 5; control housing 4 installs on integrated casing 1, controller 5 installs in control housing 4, just controller 4 connects motor assembly 2 and air condition compressor 6. It can be understood that, by the structural design of the integrated housing 1, the controller 5, the motor assembly 2, the reducer assembly 3 and the air conditioner compressor 6 can be integrated together, the integration level of the coaxial integrated electric drive system is further improved, the installation space of the controller 5, the motor assembly 2, the reducer assembly 3 and the air conditioner compressor 6 on the electric vehicle is reduced, and the connection wiring harness between the controller and the motor assembly 2 and the air conditioner compressor 6 is shortened, so that the manufacturing cost of the coaxial integrated electric drive system is reduced.
Further, a mounting groove 41 for mounting the controller 5 is arranged on the control housing 4, and the edge of the notch of the mounting groove 41 is connected to the top of the integrated housing 1. So that the edge of the notch of the mounting groove 41 is closed by the top of the integrated housing 1 (preferably, the notch is hermetically connected to the top of the integrated housing), thereby protecting the controller 5 (and there is no need to additionally provide a cover for covering the mounting groove 41 to protect the controller 5). Meanwhile, the controller is directly installed in the control shell, and the design of a box cover of the control shell is omitted, so that the manufacturing cost of the coaxial integrated electric drive system is reduced, and the coaxial integrated electric drive system is convenient to install.
In an embodiment, as shown in fig. 3 and 4, the integrated housing 1 is further provided with an electronic control accommodating groove 107 located above the motor mounting hole 103 and the compressor mounting hole 106; the integrated shell 1 further comprises a mounting surface 108 arranged above the speed reducer mounting hole 104, and the mounting surface 108 is flush with the top edge of the electronic control accommodating groove 107; the mounting surface 108 and the horizontal plane form a preset inclination angle. It is understood that there may be a certain height difference between the top of the electrical control accommodating groove 107 and the mounting surface 108 according to actual requirements and manufacturing tolerances. In the present invention, the electrical control accommodating groove 107 spans the entire outer wall of the motor mounting hole 103 and the outer wall of the compressor mounting hole 106, and the mounting surface 108 is flush with the top edge of the electrical control accommodating groove 107, so that when a part of components of the controller 5 is too long (such as the dc bus 51 in fig. 10), the electrical control accommodating groove can protrude to one end of the mounting surface 108, thereby providing a maximized mounting space for the controller 5, and minimizing the space of the coaxial integrated electric drive system in the vertical direction, thereby improving the integration thereof.
In addition, the mounting surface 108 and the horizontal plane form a preset inclination angle, and the preset inclination angle is determined according to the actual fall of the top of the air conditioner compressor 6 and the motor assembly 2; that is to say preset inclination can set up according to actual demand, for example the value range of preset inclination is: 0 to 10 degrees. In the invention, the inclined design of the mounting surface 108 fully utilizes the space above the air-conditioning compressor 6, and improves the space utilization rate of the coaxial integrated electric drive system.
In an embodiment, as shown in fig. 6, the integrated housing 1 is provided with a water inlet 109, a water outlet 110, a first connection hole 111, a second connection hole 112, and an electrically controlled cooling water channel (not shown) for cooling the controller 5; a motor cooling water channel (not shown) is formed between the motor mounting hole 103 and the motor assembly 2, and a compressor cooling water channel (not shown) is formed between the air conditioner compressor 6 and the compressor mounting hole 106; it can be understood that, in order to facilitate the processing of the second connection hole 112, the integrated housing 1 is further provided with an auxiliary hole 114 coaxially disposed with the second connection hole 112, and when the second connection hole 112 is processed, the second connection hole 112 is processed through the auxiliary hole 114; after the second communication hole is processed, the auxiliary hole 114 is also sealed.
Specifically, as shown in fig. 6, (the flow direction of the arrow in fig. 6 is the flow direction of the cooling liquid in the electronically controlled cooling water channel, the motor cooling water channel, and the compressor cooling water channel) after the cooling liquid flows into the electronically controlled cooling water channel from the water inlet 109 and absorbs the heat emitted by the controller 5, the cooling liquid flows into the motor cooling water channel through the first connection hole 111, the cooling liquid flows into the compressor cooling water channel from the second connection hole 112 after absorbing the heat emitted by the motor assembly 2 in the motor cooling water channel, and the cooling liquid flows out from the water outlet 110 after absorbing the heat emitted by the air-conditioning compressor 6 in the compressor cooling water channel. In the invention, the integrated shell 1 is integrated with the electric control cooling water channel, the motor cooling water channel and the compressor cooling water channel, so that the design of the controller 5, the motor assembly 2 and the air-conditioning compressor 6 with separate cooling water channels is avoided, and the mechanism of the coaxial integrated electric drive system is more compact; in addition, the coolant can be right controller 5, motor assembly 2 and air condition compressor 6 cools down, has improved the utilization ratio of coolant.
In one embodiment, as shown in fig. 1, the motor assembly 2 includes a motor inner housing 22 and a motor body 21 installed in the motor inner housing 22; the motor inner shell 22 is installed in the motor installation hole 103, and a motor cooling water channel is formed between the motor inner shell and the inner wall of the motor installation hole 103; it is understood that the motor body 21 includes a stator coil, a rotor coil, and an output shaft, etc.
The outer wall of the motor inner housing 22 is provided with a plurality of air guide rib plates 221 arranged along the circumferential direction of the output shaft of the motor body 21. It can be understood that, the design of the flow guide rib plate 221 enables the cooling liquid in the motor cooling water channel to flow along the circumferential flow channel of the motor inner housing 22, so that the heat released when the motor body 21 operates can be better absorbed, and the service life of the motor assembly 2 is prolonged.
In one embodiment, as shown in fig. 9 and 10, the control housing 4 is provided with a mounting groove 41 for mounting the controller 5, and a notch edge of the mounting groove 41 is connected to a top edge of the electrical control accommodating groove 107. It is understood that the controller 5 is installed in the installation groove 41 of the control housing 4, and the notch edge of the installation groove 41 is connected to the top edge of the electrical control accommodation groove 107, so that the controller 5 is installed in the inner space enclosed by the control housing 4 and the electrical control accommodation groove 107. In the invention, the mounting groove 41 is sealed by the top of the electric control accommodating groove 107, so that the design of a box cover of the coaxial integrated electric drive system is omitted, the manufacturing cost of the coaxial integrated electric drive system is reduced, and the assembly is more convenient.
In one embodiment, as shown in fig. 9, the controller 5 includes a dc bus 51, a capacitance module 52, an IGBT (Insulated Gate Bipolar Transistor) module 53, and a three-phase copper bar 54; the capacitor module 52, the IGBT module 53 and the three-phase copper bar 54 are all installed in the installation groove 41, and the dc bus 51 is installed on the control housing 4; the capacitor module 52 is connected with the automobile power battery through the direct current bus 51; the three-phase copper bar 54 is connected with a three-phase terminal of the motor assembly 2; specifically, the dc bus 51 adopts a wire throwing structure and is fixed on the control housing 4 through 4 bolts, the terminal of the dc bus 51 is connected with the capacitor module 52, and the capacitor module 52 is fixed in the control housing 4 through 4 bolts.
The automobile power battery drives the motor assembly 2 to rotate through the direct current bus 51, the capacitor module 52, the IGBT module 53 and the three-phase copper bar 54 which are connected in sequence. In the invention, the motor assembly 2 is driven to rotate by the automobile power battery through the direct current bus 51, the capacitor module 52, the IGBT module 53 and the three-phase copper bar 54 which are connected in sequence, so that the technical effect that the automobile power battery drives the automobile wheels to rotate is realized.
In one embodiment, as shown in fig. 2 to 5, the electrical control installation groove 41 includes a first holding groove 1071, a second holding groove 1072, and a third holding groove 1073 arranged at intervals in sequence; the first accommodating groove 1071 is used for accommodating the three-phase copper bar 54 extending from the installation groove 41; the second receiving groove 1072 is used for receiving the IGBT module 53 protruding from the mounting groove 41; the third receiving groove 1073 is for receiving the capacitor module 52 protruded from the mounting groove 41. (ii) a It can be understood that the capacitor module 52, the IGBT module 53 and the three-phase copper bar 54 are installed in the installation groove 41 and protrude from the installation groove 41 by a portion that is just received by the first receiving groove 1071, the second receiving groove 1072 and the third receiving groove 1073; therefore, by designing the first receiving groove 1071, the second receiving groove 1072, and the third receiving groove 1073, all components of the controller 5 can be mounted in the inner space defined by the control housing 4 and the electrical control mounting groove 41, and no additional box cover is required.
In an embodiment, as shown in fig. 7 and 8, a second through hole 113 is further formed in the first accommodating groove 1071, and the three-phase copper bar 54 passes through the second through hole 113 to connect to a three-phase terminal of the motor assembly 2; the electrically controlled cooling water passage is disposed opposite to the second holding groove 1072. As the IGBT module 53 generates a large amount of heat during operation, the electrically controlled cooling water channel is disposed opposite to the second holding groove 1072, so that the coolant in the electrically controlled cooling water channel can absorb the heat released by the IGBT module 53 more easily, thereby prolonging the service life of the controller 5. In addition, the controller 5 is installed in the electronic control accommodating groove 107, the motor assembly is installed in the motor installation hole 103, and the arrangement of the second through hole 113 can ensure that the three-phase terminal of the motor assembly 2 is directly inserted into the three-phase copper bar 54 in the second through hole 113, so that the assembly efficiency of the coaxial integrated electric drive system is improved.
In one embodiment, as shown in fig. 8, the controller 5 further includes a current sensor 55, a control board and a driving board 56, all mounted (by means of screw connection or the like) in the mounting groove 41; the driving plate 56 is installed between the control plate and the IGBT module 53, and the IGBT module 53 is located at one end, far away from the integrated shell 1, in the installation groove 41; the current sensor 55 is bent to form a through groove (not shown); the driving board 56 and the control board are both in communication connection with the IGBT module 53; the control board is in communication connection with the three-phase copper bar 54 penetrating through the through groove through the current sensor 55. Preferably, the current sensor 55 is an ac hall. Specifically, the IGBT module 53 is fixed to the uppermost portion of the control housing 4 by bolts, the driving plate 56 is mounted on the IGBT module 53 by screws, and the control board is mounted to the lowermost portion of the control housing 4 and fixed by 6 (or other number of bolts may be set as required).
It is understood that there are three current sensors 55, the three-phase copper bar 54 respectively passes through three current sensors 55, and the control board can detect the current output from the vehicle power battery to the motor assembly 2 through the current sensors 55. The control board provides a control signal to the driving board 56, and the driving board 56 converts the level signal output by the controller 5 into a signal capable of reliably driving the IGBT module 53. In the invention, the controller 5 has high integration level, and the mode of the controller 5 is improved.
In one embodiment, as shown in fig. 5, the reducer assembly 3 further includes an intermediate shaft 32, an intermediate driving gear 33, an intermediate driven gear 34, and an end cover 35; the end cover 35 is recessed to form a first accommodating part 353 and a second accommodating part 351 communicated with the first accommodating part 353; the end cover 35 is mounted on the second side 102 of the integrated housing 1 at a position opposite to the decelerator mounting hole 104; the intermediate driving gear 33 is located in the reducer mounting hole 104 and engaged with the driving gear 31, the intermediate driven gear 34 is located in the first accommodating portion 353, and both the intermediate driving gear 33 and the intermediate driven gear 34 are mounted on the intermediate shaft 32; the integrated housing 1 is concavely formed with a third accommodating part 115 communicating with the reducer mounting hole 104, and opposite ends of the intermediate shaft 32 are respectively mounted in the second and third accommodating parts 351 and 115.
Specifically, the output shaft of the motor assembly 2 is a cantilever structure, and the output shaft of the motor assembly 2 passes through two support bearings installed in the first through hole 105 and is connected to the driving gear 31. The third accommodating portion 115 is mounted with a first intermediate bearing for supporting one end of the intermediate shaft 32, the second accommodating portion 351 is mounted with a second intermediate gear for supporting the other end of the intermediate shaft 32, and the intermediate shaft 32 is mounted in the second accommodating portion 351 through the first intermediate bearing and the second intermediate bearing.
In the invention, the driving gear 31 is mounted on the output shaft of the motor assembly (that is, the driving gear 31 and the motor assembly 2 share one output shaft), so that the design of the driving shaft of the speed reducer is reduced, the integration level of the coaxial integrated electric drive system is further improved, and the manufacturing cost of the coaxial integrated electric drive system is reduced.
In one embodiment, as shown in fig. 5, the end cover 35 is further recessed to form a fourth accommodating portion 352 communicated with the first accommodating portion 353, and the coaxial integrated electric drive system further includes a differential assembly 7; the differential assembly 7 comprises a mounting plate 71, a differential 72 and a differential gear 73 connected with the differential 72; the mounting plate 71 is mounted on the second side 102 of the integrated housing 1 and disposed opposite to the reducer mounting hole 104, one end of the differential 72 is mounted on the mounting plate 71, and the other end of the differential 72 is mounted in the fourth accommodating portion 352; the differential gear 73 is located in the first accommodating portion 353 and meshes with the intermediate driven gear 34. Specifically, a first differential bearing for supporting one end of the differential 72 is mounted on the mounting plate, and a second differential bearing for supporting the other end of the differential 72 is mounted in the fourth accommodating portion 352; the differential gear traverses the first accommodating portion and the fourth accommodating portion 352 through the first differential bearing and the second differential bearing. In the invention, the driving gear 31 of the speed reducer assembly 3 is arranged on the output shaft of the motor assembly 2, and the differential assembly 7 is also integrated in the speed reducer installation space, so that the integration level of the coaxial integrated electric drive system is further improved.
The invention further provides an electric automobile which comprises the coaxial integrated electric driving system.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A coaxial integrated electric drive system is characterized by comprising an integrated shell, a motor assembly, a reducer assembly and an air-conditioning compressor;
a motor mounting hole for mounting the motor assembly and a compressor mounting hole for mounting the air-conditioning compressor are formed in the first side of the integrated shell in a recessed mode; a second side of the integrated shell, which is far away from the first side, is sunken to form a speed reducer mounting hole for mounting the speed reducer assembly; the integrated shell is also provided with a first through hole for communicating the motor mounting hole and the speed reducer mounting hole; the output shaft of the motor assembly penetrates through the first through hole from the motor mounting hole and extends into the speed reducer mounting hole, and the speed reducer assembly comprises a driving gear which is located in the speed reducer mounting hole and is sleeved on the output shaft of the motor assembly.
2. The coaxially-integrated electric drive system of claim 1, further comprising a control housing and a controller; the control shell is installed on the integrated shell, the controller is installed in the control shell, and the controller is connected with the motor assembly and the air conditioner compressor.
3. The co-axial integrated electric drive system of claim 2, wherein said integrated housing is further provided with an electrical control receiving slot located above said motor mounting hole and said compressor mounting hole; the integrated shell further comprises a mounting surface arranged above the speed reducer mounting hole, and the mounting surface is flush with the edge of the top of the electronic control accommodating groove; the mounting surface and the horizontal plane form a preset inclination angle.
4. The coaxial integrated electric drive system of claim 2, wherein the integrated housing has a water inlet, a water outlet, a first connection hole, a second connection hole, and an electrically controlled cooling water channel for cooling the controller; a motor cooling water channel is formed between the motor mounting hole and the motor assembly, and a compressor cooling water channel is formed between the air-conditioning compressor and the compressor mounting hole;
the water inlet intercommunication automatically controlled cooling water course, automatically controlled cooling water course is kept away from the one end intercommunication of water inlet first connecting hole, the one end intercommunication of automatically controlled cooling water course is kept away from to first connecting hole the motor cooling water course, the motor cooling water course is kept away from the one end intercommunication of first connecting hole the second connecting hole, the second connecting hole is kept away from the one end intercommunication of motor cooling water course the compressor cooling water course, the compressor cooling water course is kept away from the one end intercommunication of second connecting block the delivery port.
5. The co-axial integrated electric drive system of claim 4, wherein said motor assembly includes a motor inner housing and a motor body mounted in said motor inner housing; the motor inner shell is arranged in the motor mounting hole, and a motor cooling water channel is formed between the motor inner shell and the inner wall of the motor mounting hole;
and a plurality of flow guide rib plates arranged along the circumferential direction of the output shaft of the motor body are arranged on the outer wall of the motor inner shell.
6. The coaxially integrated electric drive system of claim 3, wherein said control housing defines a mounting slot for mounting said controller, a notch edge of said mounting slot engaging a top edge of said electrical control receiving slot.
7. The co-axial integrated electric drive system of claim 6, wherein the controller comprises a dc bus, a capacitive module, an IGBT module, and a three-phase copper bar; the capacitor module, the IGBT module and the three-phase copper bar are all installed in the installation groove, and the direct-current bus is installed on the control shell; the capacitor module is connected with the automobile power battery through the direct current bus; the three-phase copper bar is connected with a three-phase terminal of the motor assembly;
the automobile power battery drives the motor assembly to rotate through the direct-current bus, the capacitor module, the IGBT module and the three-phase copper bar which are connected in sequence.
8. The coaxial integrated electric drive system of claim 7, wherein the electrical control mounting slot comprises a first receiving slot, a second receiving slot, and a third receiving slot arranged at intervals in sequence; the first accommodating groove is used for accommodating the three-phase copper bar extending out of the mounting groove; the second accommodating groove is used for accommodating the IGBT module extending out of the mounting groove; the third accommodating groove is used for accommodating the capacitor module extending out of the mounting groove.
9. The co-axial integrated electric drive system of claim 8, wherein a second through hole is further formed in the first accommodating groove, and the three-phase copper bar passes through the second through hole to be connected with a three-phase terminal of the motor assembly; the electric control cooling water channel is opposite to the second accommodating groove.
10. The co-axial integrated electric drive system of claim 1, wherein said speed reducer assembly further comprises an intermediate shaft, an intermediate drive gear, an intermediate driven gear, and an end cap; the end cover is sunken to form a first accommodating part and a second accommodating part communicated with the first accommodating part; the end cover is arranged on the position, opposite to the speed reducer mounting hole, of the second side of the integrated shell; the middle driving gear is positioned in the speed reducer mounting hole and meshed with the driving gear, the middle driven gear is positioned in the first accommodating part, and the middle driving gear and the middle driven gear are both arranged on the middle shaft;
the inner wall of the speed reducer mounting hole opposite to the second accommodating part is concavely provided with a third accommodating part, and two opposite ends of the intermediate shaft are respectively mounted in the second accommodating part and the third accommodating part.
11. The coaxially-integrated electric drive system of claim 10, wherein said end cap further concavely formed with a fourth receptacle communicating with said first receptacle, said coaxially-integrated electric drive system further comprising a differential assembly; the differential assembly comprises a mounting plate, a differential and a differential gear connected with the differential; the mounting plate is mounted on the second side of the integrated shell and is arranged opposite to the speed reducer mounting hole, one end of the differential is mounted on the mounting plate, and the other end of the differential is mounted in the fourth accommodating part; the differential gear is located in the first accommodating portion and is meshed with the intermediate driven gear.
12. An electric vehicle comprising the coaxially integrated electric drive system of any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011063772.1A CN114312266A (en) | 2020-09-30 | 2020-09-30 | Coaxial integrated electric drive system, transmission and automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011063772.1A CN114312266A (en) | 2020-09-30 | 2020-09-30 | Coaxial integrated electric drive system, transmission and automobile |
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| CN114312266A true CN114312266A (en) | 2022-04-12 |
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