CN105691177A

CN105691177A - Novel electric vehicle axle driving system of coaxial balance structure

Info

Publication number: CN105691177A
Application number: CN201610046741.2A
Authority: CN
Inventors: 胡捷; 李聪波; 其他发明人请求不公开姓名
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-22
Filing date: 2016-01-22
Publication date: 2016-06-22

Abstract

A novel electric vehicle axle driving system of a coaxial balance structure is a novel coaxial direct-drive electric vehicle axle integrated structure and can be widely used as a power driving unit of a full-electric vehicle and a hybrid electric vehicle. The system is characterized in that the system is composed of a driving motor 1, a gear speed-reduction mechanism 2, a differential mechanism 3 and a parking mechanism 4; a right half shaft 3-1 connected with the differential mechanism 3 penetrates through a shaft inner hole of the driving motor 1 to be connected with wheels, and the integrated power transmission balance structure enabling the driving motor 1, the gear speed-reduction mechanism 2 and the differential mechanism 3 to be coaxially installed on an axle is formed. The parking mechanism 4 is arranged at the shaft extending end of a middle gear shaft 2-6 of the gear speed-reduction mechanism 2. An alternating-current asynchronous motor of a two-cage rotor structure is adopted as the driving motor 1 and is made of copper and aluminum. Electric energy of a storage battery can be directly and efficiently converted into low-speed large-torque mechanical energy to be transmitted to the wheels under the action of a vehicle-mounted controller.

Description

The electric axle drive system of Novel coaxial balanced structure

Technical field

The present invention is the electric axle drive system of a kind of Novel coaxial balanced structure, it is that drive motor, gear reduction, box of tricks are coaxially installed in vehicle bridge, and by direct drive electric axle drive mechanism that the Novel coaxial of halting mechanism also becoming one structure balances；Under Vehicle Controller effect, the electric energy of accumulator is converted to directly, efficiently low-speed and large-torque mechanical energy and passes to wheel。It is widely used as the electric power driver element of all-electric automobile, hybrid vehicle。

Background technology

At present, at new-energy automobile industrial circle, structure is put on the side of drive motor installation parallel with wheel semiaxis that what the drive system of electric automobile often adopted is, Fig. 1 show the typical mounting arrangement structure of conventional electric vehicle bridge, it is made up of drive motor 1, gear reduction 2, box of tricks 3 etc., left half axle 3-7, right axle shaft 3-1 are connected to box of tricks two ends outfan, and most electric automobiles are also not provided with parking P shelves。The high speed motive force of motor passes to box of tricks after gear slows down, and is redistributed on two sidecar wheels。Putting structure by this motor is use the drive mechanism of existing fuel vehicle and the electric axle structure that derives；Its transmission and differential system are more suitable for the car load power arrangement of fuel-engined vehicle, this kind of layout of new-energy automobile is had the disadvantages that one, structure not compact, take excessive installing space, extruded the parking space of battery；Two, power transmission disequilibrium, asymmetric, reduces the box of tricks efficiency of band edge face cone tooth transmission；Three, for electric automobile, very easily causing that car ramp plays the difficulty of parking without parking P shelves, severe patient is also easy to cause security incident；Four, structure is put along from fuel-engined vehicle in this kind of side, and parts integrated level is not high, and energy transmission intermediate link is many。

In recent years, hybrid vehicle quickly grows, and belongs to Toyota Prius vehicle than more typical。But what existing hybrid vehicle hybrid power system still followed is that fuel power and electric power are integrated in the pattern in a main driving vehicle bridge, do not break through electric power vehicle bridge separately as independent power unit the thinking mixing output power under the coordination of a car Ore-controlling Role with fuel power vehicle bridge。The hybrid architecture of the former integrated form is complicated, not only needs arrangement of clutch, in addition it is also necessary to complicated dynamic compatibility decision system controls the running status of two power；Along with the development of technology is with ripe, independent electric power drive system module necessarily there is, one of electric power vehicle bridge also technological development direction necessarily becoming Future New Energy Source automobile that function is complete。

Summary of the invention

Deficiency for existing electric automobile and mixed power automobile driving system, this technological invention provides one and drive motor, gear reduction, box of tricks is coaxially installed in vehicle bridge, and by the Novel coaxial balance type electric axle drive mechanism of halting mechanism also becoming one structure。The basic conception that the present invention is described in conjunction with Fig. 2 is: be installed in vehicle bridge by drive motor 1, gear reduction 2, box of tricks 3 coaxial-type to be formed the direct drive structure of integrated dynamic transmission balance, the right axle shaft 3-1 of connected with differential is from the axle endoporus of drive motor through being connected with wheel, and is also integrated on gear reduction by halting mechanism 4 on this architecture basics；Thus structurally forming an independent electric axle new construction, it is widely used as the electric power driver element of all-electric automobile, oil-electric vehicle。

The technical characteristic of the electric axle drive system of this Novel coaxial balanced structure being described, in figure below in conjunction with Fig. 3～Fig. 8: item 1 is drive motor, item 2 is gear reduction, and item 3 is box of tricks, and item 4 is halting mechanism；Item 1-1 is rear end cap, and item 1-2 is stator winding, and item 1-3 is stator core, item 1-4 is casing, and item 1-5 is rotor core, and item 1-6 is aluminum mouse cage, item 1-7 is copper mouse cage, item 1-8 is motor shaft, and item 1-9 is bearing I, and item 1-10 is drive end bearing bracket, item 1-11 is rotating speed coder, item 1-12 is constraint bearing spider, and item 1-13 is Vehicle Controller, and item 1-14 is accumulator cell assembly；Item 2-1 is input gear axle, and item 2-2 is oil sealing I, and item 2-3 is right case, and item 2-4 is bearing I I, item 2-5 is gear wheel, and item 2-6 is intermediate gear shaft, and item 2-7 is box cover, and item 2-8 is bearing I II, item 2-9 is oil sealing II, and item 2-10 is output gear wheel disc, and item 2-11 is left box body；Item 3-1 is right axle shaft, and item 3-2 is bearing I V, and item 3-3 is differential support, and item 3-4 is differential bevel gear I, and item 3-5 is differential bevel gear II, and item 3-6 is oil sealing III, and item 3-7 is left half axle；Item 4-1 is adapter sleeve, and item 4-2 is P shelves slide block, and item 4-3 is P shelves screw rod, and item 4-4 is P shelves motor, and item 4-5 is P shelves end cap。

It addition, alphabetic character mark in figure: 2p represents the number of poles of stator winding 1-2, Q₁Represent the groove number of stator core 1-3, Q₂Represent the groove number of rotor core 1-5, Z₁Represent the number of teeth of input gear axle 2-1, Z₂Represent the number of teeth of gear wheel 2-5, Z₃Represent the number of teeth of intermediate gear shaft 2-6, Z₄Represent the number of teeth of output gear wheel disc 2-10, Z₅Represent the number of teeth of differential bevel gear I3-4, Z₆Representing the number of teeth of differential bevel gear II3-5, DC represents the DC output end of accumulator cell assembly 1-14, E_DCRepresenting the VD of accumulator cell assembly 1-14, AC represents the ac output end of Vehicle Controller 1-13, u_a、u_b、u_cRepresenting the ac output voltage of Vehicle Controller 1-13, f represents the Vehicle Controller 1-13 alternative frequency exported ,～represent exchange ,+represent direct current output cathode ,-represent direct current output negative pole, n₁、T₁Represent the rotor speed of drive motor 1, torque, n₂、T₂Represent the output speed of gear reduction 2, torque。

According to above diagram it can be seen that the technology of the electric axle drive system of Novel coaxial balanced structure and following structural features:

One, the electric axle drive system of Novel coaxial balanced structure is made up of drive motor 1, gear reduction 2, box of tricks 3, the big parts of halting mechanism 4 four, and is connected with wheel by the constitutional detail such as left half axle 3-7, right axle shaft 3-1；Wherein, the right axle shaft 3-1 of connected with differential 3, from the endoporus of motor shaft 1-8 through being connected with wheel, forms the direct drive structure of the integrated dynamic transmission balance being installed in vehicle bridge by drive motor 1, gear reduction 2, box of tricks 3 three's coaxial-type；Halting mechanism 4 is arranged on the axle stretch end of the intermediate gear shaft 2-6 of gear reduction 2；

Two, the drive motor 1 of the electric axle drive system of Novel coaxial balanced structure adopts the AC asynchronous motor of the double squirrel cage rotor structure being made up of special copper mouse cage 1-7 and aluminum mouse cage 1-6, motor shaft 1-8 adopts the hollow shaft structure offering endoporus, and motor shaft 1-8 front end is inserted the input gear axle 2-1 endoporus of gear reduction 2 and connected as one by spline；The air-gap rotating magnetic field rotating speed n that the stator winding 1-2 of drive motor 2p pole produces under the three-phase alternating current electro ultrafiltration that frequency is f_sRotating speed n with double-cage rotor₁, revolutional slip s meet following relation constraint:

\begin{matrix} n_{s} = \frac{60 \times f}{p}, & s = \frac{n_{s} - n_{1}}{n_{s}} \times 100 % \end{matrix};

Three, the gear reduction 2 of the electric axle drive system of Novel coaxial balanced structure is by having Z₁Input gear axle 2-1, Z of the number of teeth₂Gear wheel 2-5, Z of the number of teeth₃Intermediate gear shaft 2-6, Z of the number of teeth₄The output gear wheel disc 2-10 of the number of teeth constitutes the gear pair structure of double reduction；Output gear wheel disc 2-10 is installed on differential support 3-3, and right axle shaft 3-1 passes from differential support 3-3 and motor shaft 1-8 endoporus respectively；The rotating speed n of drive motor 1₁, torque T₁Rotating speed n with output gear wheel disc 2-10₂, torque T₂Meet the constraint of following structural relation respectively:

\begin{matrix} \frac{n_{2}}{n_{1}} = \frac{Z_{1}}{Z_{2}} \times \frac{Z_{3}}{Z_{4}}, & \frac{T_{2}}{T_{1}} = \frac{n_{1}}{n_{2}} \times η_{2} = \frac{Z_{2}}{Z_{1}} \times \frac{Z_{4}}{Z_{3}} \times η_{2} \end{matrix},

Wherein, η₂For gear reduction transmission efficiency, it is the positive percent between 80%～100%。

Adopt the techno-economic effect that technique scheme reaches:

Compared with traditional motor side putting type power drive system, the electric axle drive system of the Novel coaxial balanced structure that the present invention relates to has advantage will be apparent below:

1. simple in construction, saving material and installing space: achieve the direct driving of low-speed and large-torque, simplied system structure with simplest structure, save installing space, for electric automobile, there is actual application value。

2. energy loss is little, and transmission efficiency is high: owing to coaxial-type is installed, it is achieved that directly drive transmission so that power transmission more balances, and decreases energy expenditure, can improve the energy conversion efficiency of whole system。

3. reliability height, life-span length, shake little, noise is low: owing to adopting integrated structure, decrease intermediate transfer link, the vibrations of complete machine and noise can be made all to be effectively improved, and then improve the reliability of drive system, increase the service life。

4. Constant-power speed range is broad: controlled voltage and the frequency of input drive motor by Vehicle Controller adjustment, the transmission requirement of infinitely variable speeds can be realized in the bigger range of speeds, thus the gear shift clutch that conventional mechanical speed change system is common can directly be cancelled, the infinitely variable speeds of hybrid vehicle, electric automobile and battery-operated motor cycle is realized having practical value by this。

5. regulable control is simple: by mature technologies such as SPWM Technique SPWM control, inversion changing frequency controls, just can conveniently realize pressure regulation, frequency modulation thus regulating the requirement of motor output operating mode, need not the accurate position feedback loop of AC servo motor of conventional hi-Fix, adopt simple control can meet most of application scenario according to load state。

Accompanying drawing explanation

Fig. 1 is the representative configuration structure chart of traditional electric axle；

Fig. 2 is the layout structure figure of the electric axle drive system of Novel coaxial balanced structure；

Fig. 3 is the full sectional structure chart of the electric axle drive system of Novel coaxial balanced structure；

Fig. 4 is the section of structure of the drive motor of the electric axle drive system of Novel coaxial balanced structure；

Fig. 5 is the drive motor rotor stereochemical structure profile of the electric axle drive system of Novel coaxial balanced structure；

Fig. 6 is the section of structure of the gear reduction of the electric axle drive system of Novel coaxial balanced structure；

Fig. 7 is the section of structure of the box of tricks of the electric axle drive system of Novel coaxial balanced structure；

Fig. 8 is the section of structure of the halting mechanism of the electric axle drive system of Novel coaxial balanced structure。

In above figure: item 1 is drive motor, item 2 is gear reduction, and item 3 is box of tricks, and item 4 is halting mechanism；Item 1-1 is rear end cap, and item 1-2 is stator winding, and item 1-3 is stator core, item 1-4 is casing, and item 1-5 is rotor core, and item 1-6 is aluminum mouse cage, item 1-7 is copper mouse cage, item 1-8 is motor shaft, and item 1-9 is bearing I, and item 1-10 is drive end bearing bracket, item 1-11 is rotating speed coder, item 1-12 is constraint bearing spider, and item 1-13 is Vehicle Controller, and item 1-14 is accumulator cell assembly；Item 2-1 is input gear axle, and item 2-2 is oil sealing I, and item 2-3 is right case, and item 2-4 is bearing I I, item 2-5 is gear wheel, and item 2-6 is intermediate gear shaft, and item 2-7 is box cover, and item 2-8 is bearing I II, item 2-9 is oil sealing II, and item 2-10 is output gear wheel disc, and item 2-11 is left box body；Item 3-1 is right axle shaft, and item 3-2 is bearing I V, and item 3-3 is differential support, and item 3-4 is differential bevel gear I, and item 3-5 is differential bevel gear II, and item 3-6 is oil sealing III, and item 3-7 is left half axle；Item 4-1 is adapter sleeve, and item 4-2 is P shelves slide block, and item 4-3 is P shelves screw rod, and item 4-4 is P shelves motor, and item 4-5 is P shelves end cap。

Detailed description of the invention

Internal structure relationship characteristic below in conjunction with the electric axle drive system of the drawings and the specific embodiments Novel coaxial balanced structure to the present invention relates to is described further:

One from the figure 3, it may be seen that the electric axle drive system of Novel coaxial balanced structure is made up of drive motor 1, gear reduction 2, box of tricks 3, the big parts of halting mechanism 4 four, and is connected with wheel by the constitutional detail such as left half axle 3-7, right axle shaft 3-1；Wherein, the right axle shaft 3-1 of connected with differential 3, from the endoporus of motor shaft 1-8 through being connected with wheel, forms the direct drive structure of the integrated dynamic transmission balance being installed in vehicle bridge by drive motor 1, gear reduction 2, box of tricks 3 three's coaxial-type；Halting mechanism 4 is arranged on the axle stretch end of the intermediate gear shaft 2-6 of gear reduction 2；

Two, as shown in Figure 4, the drive motor 1 of the electric axle drive system of Novel coaxial balanced structure adopts the AC asynchronous motor of the double squirrel cage rotor structure being made up of special copper mouse cage 1-7 and aluminum mouse cage 1-6, motor shaft 1-8 adopts the hollow shaft structure offering endoporus, and motor shaft 1-8 front end is inserted the input gear axle 2-1 endoporus of gear reduction 2 and connected as one by spline；The air-gap rotating magnetic field rotating speed n that the stator winding 1-2 of drive motor 2p pole produces under the three-phase alternating current electro ultrafiltration that frequency is f_sRotating speed n with double-cage rotor₁, revolutional slip s meet following relation constraint:

\begin{matrix} n_{s} = \frac{60 \times f}{p}, & s = \frac{n_{s} - n_{1}}{n_{s}} \times 100 % \end{matrix};

Three it will be appreciated from fig. 6 that the gear reduction 2 of electric axle drive system of Novel coaxial balanced structure is by having Z₁Input gear axle 2-1, Z of the number of teeth₂Gear wheel 2-5, Z of the number of teeth₃Intermediate gear shaft 2-6, Z of the number of teeth₄The output gear wheel disc 2-10 of the number of teeth constitutes the gear pair structure of double reduction；Output gear wheel disc 2-10 is installed on differential support 3-3, and right axle shaft 3-1 passes from differential support 3-3 and motor shaft 1-8 endoporus respectively；The rotating speed n of drive motor 1₁, torque T₁Rotating speed n with output gear wheel disc 2-10₂, torque T₂Meet the constraint of following structural relation respectively:

\begin{matrix} \frac{n_{2}}{n_{1}} = \frac{Z_{1}}{Z_{2}} \times \frac{Z_{3}}{Z_{4}}, & \frac{T_{2}}{T_{1}} = \frac{n_{1}}{n_{2}} \times η_{2} = \frac{Z_{2}}{Z_{1}} \times \frac{Z_{4}}{Z_{3}} \times η_{2} \end{matrix},

Four, according to Fig. 4, Fig. 5, drive motor 1 is made up of stator module, rotor assembly, drive end bearing bracket 1-10, rear end cap 1-1, rotating speed coder 1-11 and constraint bearing spider 1-12；Wherein, stator module is by having the stator winding 1-2 of three-phase and 2p pole, having Q₁Stator core 1-3, the casing 1-4 of groove is constituted；Rotor assembly is by having Q₂The rotor core 1-5 of groove, the aluminum mouse cage 1-6 that die casting manufactures, the copper mouse cage 1-7 of welding manufacture, the motor shaft 1-8 of hollow-core construction and bearing I 1-9 constitutes double, two cage-shaped structure, rotor cage bar being distributed as in groove of double, two cage-shaped structure: the bus of the aluminum mouse cage 1-6 of die casting is in groove upper strata, both ends by while die casting aluminum end ring not short to being integrally formed aluminum mouse cage 1-6, the bus of the copper mouse cage 1-7 of welding is in Cao Nei lower floor, copper bus at two ends by copper end ring welding not short to the copper mouse cage 1-7 being integrally formed closing of circuit, at both ends, aluminum cage ring is wrapped in outside copper cage ring；The equally distributed Q of rotor core 1-5 cylindrical₂Individual groove adopt closed slot form, and rotor slot one stator tooth of skew vertically from angle of bevel；The output frequency of motor stator three-phase lead-out wire and Vehicle Controller 1-13 is f, three-phase voltage is (u_a、u_b、u_c) exchange AC outfan electrically connect, the input of Vehicle Controller 1-13 and DC voltage are E_DCThe direct current DC outfan of accumulator cell assembly 1-14 electrically connect。

Five, according to Fig. 6, gear reduction 2 is Z by the number of teeth₁Input gear axle 2-1, the number of teeth be Z₂Gear wheel 2-5, the number of teeth be Z₃Intermediate gear shaft 2-6, the number of teeth be Z₄Output gear wheel disc 2-10, right case 2-3, left box body 2-11, box cover 2-7 and bearing I I2-4, bearing I II2-8, the constitutional detail such as oil sealing I2-2, oil sealing II2-9 composition, output gear wheel disc 2-10 is installed on differential support 3-3 and engages with intermediate gear shaft 2-6, gear wheel 2-5 is installed on intermediate gear shaft 2-6 and engages with input gear axle 2-1, input gear axle 2-1 is hollow-core construction, its endoporus one end is equipped with oil sealing II2-9, and the other end is connected with motor shaft by internal spline。

Six, according to Fig. 7, box of tricks 3 is the differential bevel gear I3-4 of Z5, the number of teeth by right axle shaft 3-1, bearing I V3-2, differential support 3-3, the number of teeth is that the constitutional details such as the differential bevel gear II3-5 of Z6, oil sealing III3-6 and left half axle 3-7 form；Wherein, the bevel gear pair structure of two differential bevel gear I3-4 and two differential bevel gear II3-5 a pair differential actions of composition, two differential bevel gear I3-4 are respectively arranged on differential support 3-3, and two differential bevel gear II3-5 are connected on left half axle 3-7 and right axle shaft 3-1；Box of tricks part is installed in the cabinet space between left box body 2-11 and box cover 2-7。

Seven, according to Fig. 8, halting mechanism 4 is made up of parts such as adapter sleeve 4-1, P shelves slide block 4-2, P shelves screw rod 4-3, P shelves motor 4-4, P shelves end cap 4-5, P shelves slide block 4-2 endoporus front portion offers spline, its rear portion is provided with trapezoidal thread and is connected with P shelves screw rod 4-3, spline inserts locking in the spline tooth of intermediate gear shaft 2-6 axle stretch end when parking, P shelves motor 4-4 is installed on P shelves end cap 4-5, and its axle extending portion inserts P shelves screw rod 4-3 endoporus。

Above-described is only the preferred implementation of this technological invention; for a person skilled in the art; under the premise without departing from this technological invention principle and coaxial balancing formula structure; (" double reduction transmission " malformation as the present invention shown is " multi-stage speed-reducing transmission " structure with improvement can also to make some malformation; or adjust the deformation such as the magneto that drive motor is hollow-core construction); these also should be considered as the protection domain of this technological invention, and these are all without affecting effect and the practicality that this technological invention is implemented。

Claims

1. the electric axle drive system of Novel coaxial balanced structure, is characterized in that:

One, the electric axle drive system of Novel coaxial balanced structure is made up of drive motor (1), gear reduction (2), box of tricks (3), the big parts of halting mechanism (4) four, and is connected with wheel by the constitutional detail such as left half axle (3-7), right axle shaft (3-1)；Wherein, the right axle shaft (3-1) of connected with differential (3), from the endoporus of motor shaft (1-8) through being connected with wheel, forms the direct drive structure of the integrated dynamic transmission balance being installed in vehicle bridge by drive motor (1), gear reduction (2), box of tricks (3) three's coaxial-type；Halting mechanism (4) is arranged on the axle stretch end of the intermediate gear shaft (2-6) of gear reduction (2)；

Two, the drive motor (1) of the electric axle drive system of Novel coaxial balanced structure adopts the AC asynchronous motor of the double squirrel cage rotor structure being made up of special copper mouse cage (1-7) and aluminum mouse cage (1-6), motor shaft (1-8) adopts the hollow shaft structure offering endoporus, and motor shaft (1-8) front end is inserted input gear axle (2-1) endoporus of gear reduction (2) and connected as one by spline；The air-gap rotating magnetic field rotating speed n that the stator winding (1-2) of drive motor 2p pole produces under the three-phase alternating current electro ultrafiltration that frequency is f_sRotating speed n with double-cage rotor₁, revolutional slip s meet following relation constraint:

n_{s} = \frac{60 \times f}{p}, s = \frac{n_{s} - n_{1}}{n_{s}} \times 100 %;

Three, the gear reduction (2) of the electric axle drive system of Novel coaxial balanced structure is by having Z₁The input gear axle (2-1) of the number of teeth, Z₂The gear wheel (2-5) of the number of teeth, Z₃The intermediate gear shaft (2-6) of the number of teeth, Z₄The output gear wheel disc (2-10) of the number of teeth constitutes the gear pair structure of double reduction；Output gear wheel disc (2-10) is installed on differential support (3-3), and right axle shaft (3-1) passes from differential support (3-3) and motor shaft (1-8) endoporus respectively；The rotating speed n of drive motor (1)₁, torque T₁Rotating speed n with output gear wheel disc (2-10)₂, torque T₂Meet the constraint of following structural relation respectively:

\frac{n_{2}}{n_{1}} = \frac{Z_{1}}{Z_{2}} \times \frac{Z_{3}}{Z_{4}}, \frac{T_{2}}{T_{1}} = \frac{n_{1}}{n_{2}} \times η_{2} = \frac{Z_{2}}{Z_{1}} \times \frac{Z_{4}}{Z_{3}} \times η_{2},

2. the electric axle drive system of Novel coaxial balanced structure according to claim 1, is characterized in that: drive motor (1) is made up of stator module, rotor assembly, drive end bearing bracket (1-10), rear end cap (1-1), rotating speed coder (1-11) and constraint bearing spider (1-12)；Wherein, stator module is by having the stator winding (1-2) of three-phase and 2p pole, having Q₁The stator core (1-3) of groove, casing (1-4) are constituted；Rotor assembly is by having Q₂The rotor core (1-5) of groove, the aluminum mouse cage (1-6) that die casting manufactures, the copper mouse cage (1-7) of welding manufacture, the motor shaft (1-8) of hollow-core construction and bearing I (1-9) constitute double, two cage-shaped structure, rotor cage bar being distributed as in groove of double, two cage-shaped structure: the bus of the aluminum mouse cage (1-6) of die casting is in groove upper strata, both ends by while die casting aluminum end ring not short to being integrally formed aluminum mouse cage (1-6), the bus of the copper mouse cage (1-7) of welding is in Cao Nei lower floor, copper bus at two ends by copper end ring welding not short to the copper mouse cage (1-7) being integrally formed closing of circuit, at both ends, aluminum cage ring is wrapped in outside copper cage ring；The equally distributed Q of rotor core (1-5) cylindrical₂Individual groove adopt closed slot form, and rotor slot one stator tooth of skew vertically from angle of bevel；The output frequency of motor stator three-phase lead-out wire and Vehicle Controller (1-13) is f, three-phase voltage is (u_a、u_b、u_c) exchange AC outfan electrically connect, the input of Vehicle Controller (1-13) and DC voltage are E_DCThe direct current DC outfan of accumulator cell assembly (1-14) electrically connect。

3. the electric axle drive system of Novel coaxial balanced structure according to claim 1, is characterized in that: gear reduction (2) is Z by the number of teeth₁Input gear axle (2-1), the number of teeth be Z₂Gear wheel (2-5), the number of teeth be Z₃Intermediate gear shaft (2-6), the number of teeth be Z₄Output gear wheel disc (2-10), right case (2-3), left box body (2-11), box cover (2-7) and bearing I I (2-4), bearing I II (2-8), oil sealing I (2-2), the constitutional detail compositions such as oil sealing II (2-9), output gear wheel disc (2-10) is installed on differential support (3-3) and above and engages with intermediate gear shaft (2-6), gear wheel (2-5) is installed on intermediate gear shaft (2-6) and above and engages with input gear axle (2-1), input gear axle (2-1) is hollow-core construction, its endoporus one end is equipped with oil sealing II (2-9), the other end is connected with motor shaft by internal spline。

4. the electric axle drive system of Novel coaxial balanced structure according to claim 1, is characterized in that: box of tricks (3) is the differential bevel gear I (3-4) of Z5, the number of teeth by right axle shaft (3-1), bearing I V (3-2), differential support (3-3), the number of teeth is that the constitutional details such as the differential bevel gear II (3-5) of Z6, oil sealing III (3-6) and left half axle (3-7) form；Wherein, two differential bevel gear I (3-4) and two differential bevel gear II (3-5) constitute the bevel gear pair structure of a pair differential action, two differential bevel gear I (3-4) are respectively arranged on differential support (3-3), and two differential bevel gear II (3-5) are connected on left half axle (3-7) and right axle shaft (3-1)；Box of tricks part is installed in the cabinet space between left box body (2-11) and box cover (2-7)。

5. the electric axle drive system of Novel coaxial balanced structure according to claim 1, it is characterized in that: halting mechanism (4) is by adapter sleeve (4-1), P shelves slide block (4-2), P shelves screw rod (4-3), P shelves motor (4-4), the part compositions such as P shelves end cap (4-5), P shelves slide block (4-2) endoporus front portion offers spline, its rear portion is provided with trapezoidal thread and is connected with P shelves screw rod (4-3), spline inserts locking in the spline tooth of intermediate gear shaft (2-6) axle stretch end when parking, P shelves motor (4-4) is installed on P shelves end cap (4-5), its axle extending portion inserts P shelves screw rod (4-3) endoporus。