CN107020935A - A kind of electric drive axle system and control method based on sliding sleeve manual transmission - Google Patents

Abstract

The invention discloses an electric drive axle system based on a sliding sleeve shift transmission, comprising: a transmission housing; a drive motor, which is arranged on one side of the transmission housing, and includes an output shaft of the drive motor; an intermediate shaft, one end of which is It is rotatably supported in the transmission housing, and the intermediate shaft is provided with a reduction gear; the sliding sleeve shift mechanism is arranged on the other side of the transmission housing, and is rotatably sleeved on the intermediate shaft, which can Sliding along the intermediate shaft, and can be selectively combined with the transmission housing or the reduction gear; the planetary gear transmission mechanism, which is connected to the drive motor shaft and fixed in the middle of the transmission housing, the planetary gear transmission The planet carrier of the mechanism is connected with the sliding sleeve shifting mechanism, and also discloses an upshift and downshift control method of an electric drive axle system based on the sliding sleeve shift transmission.

Description

An electric drive axle system and control method based on a sliding sleeve shift transmission

technical field

The invention relates to an electric drive axle system, in particular to an electric drive axle system based on a sliding sleeve shift transmission and an electric drive control method based on a sliding sleeve shift transmission.

Background technique

Electric vehicles are new, energy-saving and environmentally friendly vehicles, especially in today's environment with severe air pollution, they have great development potential and broad application prospects. An electric vehicle uses an electric motor to replace the engine of a traditional car. The electric motor can be started with load and can meet the requirements of the car through reasonable configuration, which is a big difference from the engine. It is no longer suitable to use multi-speed transmissions on electric vehicles, but if the variable speed transmission device is cancelled, it will be difficult to meet the requirements of vehicle climbing and high-speed driving, especially for small and medium-sized vehicles, it is necessary to redesign the power of electric vehicles according to the working characteristics of the electric motor system.

The current electric drive axle system for electric vehicles is more and more popular. Compared with the traditional drive system, the electric drive axle system for electric vehicles has great advantages, especially in terms of environmental protection. The layout of the existing two-speed transmissions for electric vehicles mostly adopts the parallel shaft type and the planetary row type. The two-speed transmissions that adopt the parallel shaft type layout usually use synchronizers or clutches to switch gears. If synchronizers, etc. are used to achieve The shifting of the gears has the following disadvantages: it is necessary to install a shift actuator separately, which increases the volume of the drive system, which is not convenient for the layout of the vehicle, and there is a power interruption during the shifting process; Two-speed transmissions usually switch between gears through a combination of clutches or brakes, but they have the following disadvantages: the shifting actuators are scattered, the size of the transmission and differential is large, the drive system is not compact enough, and there is a gap in the output power. The case where the rotational speed cannot be matched.

Contents of the invention

The present invention designs and develops an electric drive axle system based on a sliding-sleeve shifting transmission. The transmission part is composed of a planetary row and a sliding-sleeve shifting mechanism.

Another object of the present invention is to provide an upshift control method for an electric drive axle system based on a sliding sleeve shift transmission, which realizes a rapid upshifting process by precisely controlling the sliding sleeve and the drive motor.

Another object of the present invention is to provide a downshift control method for an electric drive axle system based on a two-speed transmission. The electric drive axle system realizes a fast downshift process by precisely controlling the accelerator pedal, drive motor and sliding sleeve.

The technical scheme provided by the invention is:

An electric drive axle system based on a slip shift transmission, comprising:

transmission case;

A drive motor, which is arranged on one side of the transmission housing, and includes a drive motor output shaft;

an intermediate shaft, one end of which is rotatably supported in the transmission housing, and a reduction gear is arranged on the intermediate shaft;

The sliding sleeve shifting mechanism is arranged on the other side of the transmission housing, is rotatably sleeved on the intermediate shaft, can slide along the intermediate shaft, and can be selectively combined with the transmission housing or the reduction gear;

The planetary gear transmission mechanism is connected to the drive motor shaft and fixed in the middle of the transmission housing, and the planet carrier of the planetary gear transmission mechanism is connected to the sliding sleeve shift mechanism.

Preferably, the planetary gear transmission mechanism includes:

a planet carrier, which is rotatably sleeved on the intermediate shaft;

a planet gear shaft supported on the planet gear carrier;

The front planetary row sun gear is rotatably sleeved on the other end of the intermediate shaft;

The front planetary row planetary gear is sleeved on the planetary gear shaft and meshed with the front planetary row sun gear;

The rear planetary sun gear is fixedly sleeved on the intermediate shaft;

The rear planetary row planetary gear is sheathed on the planetary gear shaft, meshes with the rear planetary sun gear, and can rotate coaxially with the front planetary row planetary gear.

Preferably, it also includes a flexible disc, one end of which is connected to the drive motor shaft, and the other end is connected to the front planetary sun gear.

Preferably, it also includes a differential, which is connected to the intermediate shaft, including a left half shaft and a right half shaft, and the output power of the differential after shifting is output through the left half shaft and the right half shaft, and the differential Accelerators include:

a differential case, which is connected to the intermediate shaft and used to transmit the power of the planetary gear transmission mechanism to the differential;

The differential planetary gear shaft is arranged in the differential case, and the differential planetary gear shaft is used to drive the differential planetary gears to rotate;

The first differential bevel gear, which meshes with the differential planetary gear and is fixedly connected to the left half shaft, and the first differential bevel gear is used to drive the left half shaft to rotate;

The second differential bevel gear meshes with the differential planetary gear and is fixedly connected to the right half shaft, and the second differential bevel gear is used to drive the right half shaft to rotate.

Preferably, it further includes that the reduction gear is connected to the differential case.

Preferably, the sliding sleeve shifting mechanism includes:

a sliding sleeve, which is sleeved on the intermediate shaft;

The shift motor is connected to the upper end of the sliding sleeve and is used to drive the sliding sleeve to slide along the intermediate shaft.

A method for controlling an upshift of an electric drive axle system based on a sliding sleeve shift transmission, comprising:

First, start the shift motor, and drive the sliding sleeve shift mechanism to gradually move to the middle position;

When the speed of the drive motor decreases, the input speed becomes smaller, the planetary carrier starts to rotate, the slip speed of the sliding sleeve drops rapidly, and the motor torque decreases by the first torque preset value;

When the slip speed drops to the preset value, the sliding sleeve will gradually move to the right station, the slip speed will be close to zero, and the sliding sleeve will be completely in the right station, and the upshift operation will be completed.

A downshift control method for an electric drive axle system based on a sliding sleeve shift transmission, comprising:

When the accelerator pedal opening is not less than the first opening preset value, execute the first downshift process; when the accelerator pedal opening is smaller than the first opening preset value, judge whether the driving motor torque is smaller than the second torque preset value ;

When the drive motor torque is not less than the second torque preset value, execute the first downshift process; set value;

When the change rate of the accelerator pedal opening is not less than the second opening preset value, the first downshift process is executed; when the accelerator pedal opening change rate is smaller than the second opening preset value, the second downshift process is executed.

Preferably, the first downshift process includes:

First, start the shift motor, and drive the sliding sleeve shift mechanism to gradually move to the middle position;

The speed of the drive motor shaft increases rapidly, the rate of change of the drive motor shaft speed decreases rapidly, the sliding sleeve moves to the left and rotates synchronously; the torque of the drive motor increases by a preset value;

When the speed of the drive motor increases to the preset value, the rate of change of the speed entering the drive motor shaft decreases rapidly, and the sliding sleeve gradually moves to the left position, quickly restoring the torque of the drive motor to the torque before shifting. At this time, the sliding sleeve Cover is completely in the left position.

Preferably, the second downshift process includes:

Firstly, start the shift motor to drive the sliding sleeve shift mechanism to gradually move to the middle position; the sliding sleeve gradually moves to the neutral position.

The speed sensor of the drive motor shaft is used to judge whether the speed has increased. When the speed of the drive motor decreases, the input speed becomes smaller, the planetary carrier starts to rotate, the slip speed drops rapidly, and the torque of the drive motor increases by a preset value. When the slip speed drops to the preset value, it enters the stage of decreasing slip speed change rate. At this stage, the sliding sleeve gradually moves to the left station, the slip speed is close to zero, and the sliding sleeve is completely in the left station.

Beneficial effects of the present invention

1. The electric drive system is composed of a drive motor, a sliding sleeve shift mechanism and a differential. The number of parts is small, the structure is compact, and it is easy to install. In addition, the number of meshing gears in the transmission process is small, which effectively improves the transmission efficiency.

2. The driving motor can be reversed, so the reverse gear is realized through the reverse gear of the motor, and the gear shift actuator for reverse gear is cancelled, the structure is more compact, and the reverse gear control is simple and easy to implement.

3. The drive motor has two working modes: motor and generator. When the vehicle is in the braking condition, the drive motor is converted into a generator mode to recover braking energy, improve the energy utilization rate of the vehicle, and save energy. Effect.

4. Use the reducer mechanism to decelerate the output power of the drive motor shaft, the first output shaft and the second output shaft, so as to realize the advantages of matching speed and transmission torque.

5. The upshift control method of the electric drive axle system can realize a fast upshift process and a fast downshift process.

Description of drawings

FIG. 1 is a schematic structural diagram of an electric drive axle system based on a sliding-sleeve transmission according to the present invention.

Fig. 2 is a flow chart of the upshift control strategy of the electric drive axle system of the present invention.

Fig. 3 is a flow chart of the downshift control strategy of the electric drive axle system of the present invention.

Fig. 4 is a flow chart of the Power-off downshift control strategy of the electric drive axle system of the present invention.

Fig. 5 is a flow chart of the Power-on downshift control strategy of the electric drive axle system of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

As shown in Figure 1, the electric drive axle system based on the sliding sleeve shift transmission provided by the present invention includes: a motor part, a transmission part, a differential part and a half shaft part, wherein the transmission part is composed of a planetary row, a sliding sleeve shifting Composition of blocking mechanism.

Wherein, the drive motor part is arranged on one side of the transmission housing 140, including: a drive motor shaft 150, a stator 110 and a rotor 120, wherein the stator 110 of the drive motor is connected with the transmission housing 140 through an interference fit. , the drive motor is in motor mode, and when braking, the drive motor is in generator mode. The intermediate shaft 210, one end of which is rotatably supported in the transmission case 140, on which a reduction gear 240 is arranged; , can slide along the intermediate shaft 210, and can be selectively combined with the transmission housing 140 or the reduction gear 240; the planetary gear transmission mechanism, which is connected to the drive motor shaft 150 and fixed in the middle of the transmission housing 140, the planet carrier of the planetary gear transmission mechanism 310 is connected with the sliding sleeve shifting mechanism.

The planetary gear transmission mechanism includes: the front planetary row and the rear planetary row, wherein the front planetary row includes: the front planetary row sun gear 320, the front planetary row planetary gear 330, the planetary gear shaft 340, the planetary carrier 310, and the rear planetary row, including : the rear planetary row sun gear 350, the rear planetary row planetary gear 360, the planetary gear shaft 340, and the planetary carrier 310, wherein, the planetary carrier 310 is rotatably sleeved on the intermediate shaft 210; the planetary gear shaft 340 is supported on On the planet carrier 310; the front planetary sun gear 320 is rotatably sleeved on the other end of the intermediate shaft 210; the front planetary sun gear 330 is sleeved on the planetary gear shaft 340, meshing with the front planetary sun gear 320; the rear planetary sun gear 350, which is fixedly sleeved on the intermediate shaft 210; the rear planetary planetary gear 360, which is sleeved on the planetary gear shaft 340, meshes with the rear planetary sun gear 360, and can rotate coaxially with the front planetary planetary gear 360.

The sliding sleeve shifting mechanism has three working positions: left, middle and right. The sliding sleeve 220 and the planetary carrier 310 are in constant engagement through splines. When the sliding sleeve 220 moves to the left, the planetary carrier 310 is combined with the transmission case 140, and the planetary row is fixed to realize a low gear. When the sliding sleeve 220 moves to the right, the planet carrier 310 is combined with the intermediate shaft 210 to realize a high speed gear. When the sliding sleeve 220 is in the middle position, no power is transmitted, and it is neutral, wherein the sliding sleeve refers to the synchronizer.

Flexible disk 230, one end of which is connected to drive motor shaft 150, the other end is connected to front planetary sun gear 320, the differential is connected to intermediate shaft 210, including left half shaft 410 and right half shaft 420, and the output power of the differential after shifting Through the output of the left half shaft 410 and the right half shaft 420, the differential includes: a differential case 430, which is connected with the intermediate shaft 210, and is used to transmit the power of the planetary gear transmission mechanism to the differential; The planetary gear shaft 440, which is arranged in the differential case 430; the differential planetary gear shaft 440 is used to drive the differential planetary gear 460 to rotate; the first differential bevel gear 450, which is connected with the differential planetary gear 460 is meshed and fixedly connected to the left half shaft 410, the first differential bevel gear 450 is used to drive the left half shaft 410 to rotate; the second differential bevel gear 470 is meshed with the differential planetary gear 460 and fixedly connected to the right half The shaft 420 and the second differential bevel gear 470 are used to drive the right half shaft 420 to rotate, and the differential housing 430 is connected to the reduction gear 240 .

The sliding sleeve shifting mechanism includes: a sliding sleeve 220 sleeved on the intermediate shaft 210 ; a shift motor connected to the upper end of the sliding sleeve 220 for driving the sliding sleeve 220 to slide along the intermediate shaft 210 .

The gear switching of the electric drive axle system is realized by moving the sliding sleeve 220 .

In the first gear, the drive motor rotates forward (the direction of rotation of the motor that realizes the forward rotation of the vehicle is the forward direction), and the 13 sliding sleeve 220 is located at the left station. At this time, the planet carrier 310 is fixed, and the power is transmitted to the flexible disk through the output shaft 150 of the drive motor. 230, and then transmitted to the front planetary row sun gear 320 through the 230 flexible disk, then transmitted to the rear planetary row planetary gear 360 through the front planetary row planetary gear 330, and then transmitted to the intermediate shaft 210 through the rear planetary row sun gear 350, and then passed through the middle The shaft 210 is transmitted to the reduction gear 240, and then transmitted to the differential case 430 through the reducer driven gear 370, and the rotating differential case 430 drives the differential bevel gear shaft 440 connected to it to rotate, through the needle roller bearing The differential planetary bevel gear 460 installed on the differential bevel gear shaft 440 revolves with the differential bevel gear shaft 440, and rotates with the rotation speed of the left and right half shafts to achieve a differential effect, and the differential planetary bevel gear The gear 460 transmits the power to the first differential bevel gear 450 and the second differential bevel gear 470 meshed with it, the first differential bevel gear 450 drives the differential left half shaft 140 to rotate and output power, the second The second differential bevel gear 470 drives the right half shaft 420 of the differential to rotate and output power to realize power transmission.

In the second gear, the driving motor rotates forward, and the sliding sleeve 220 is located at the right station. At this time, the planetary carrier 310 is combined with the intermediate shaft 210, and the speed is the same. The power is transmitted to the flexible disc 230 through the output shaft 150 of the driving motor, and then transmitted to the The front planetary row sun gear 320 is then transmitted to the planetary gear shaft 340 through the front planetary row planetary gear 330, then transmitted to the intermediate shaft 210 through the planet carrier 310, and then transmitted to the drive gear 240 of the reducer through the intermediate shaft 210, and then passed through the reducer The driven gear 370 is transmitted to the differential case 430, and the rotating differential case 430 drives the differential bevel gear shaft 440 connected to it to rotate, and the differential gear mounted on the differential bevel gear shaft 440 through the needle bearing The planetary bevel gear 460 of the differential gear revolves with the differential bevel gear shaft 440, and rotates with the rotation speed of the left and right half shafts to achieve a differential effect, and the differential planetary bevel gear 460 transmits power to the first differential gear meshed with it. On the transmission bevel gear 450 and the second differential bevel gear 470, the first differential bevel gear 450 drives the differential left half shaft 410 to rotate and output power, and the second differential bevel gear 470 drives the differential right The half shaft 420 rotates and outputs power to realize power transmission.

In the process of upgrading from the first gear to the second gear, the sliding sleeve 220 moves from the left station to the right station through the shift control unit, and the power is transmitted to the flexible disc 230 through the output shaft 150 of the drive motor, and then transmitted to the front planetary row through the flexible disc 230 The sun gear 320 is transmitted to the planetary gear shaft 340 through the front planetary gear 330, then to the intermediate shaft 210 through the planet carrier 310, then to the reducer gear 240 through the intermediate shaft 210, and then to the reducer driven gear 370 Transmission to the differential case 430, the rotating differential case 430 drives the differential bevel gear shaft 440 connected to it to rotate, and the differential planetary cone mounted on the differential bevel gear shaft 430 through needle bearings The gear 440 revolves with the differential bevel gear shaft 430, and rotates with the rotation speed of the left and right half shafts to achieve a differential effect, and the differential planetary bevel gear 460 transmits power to the first differential bevel gear meshed with it 450 and the second differential bevel gear 470, the first differential bevel gear 450 drives the differential left half shaft 410 to rotate and output power, and the second differential bevel gear 470 drives the differential right half shaft 420 to rotate And output power to realize power transmission.

In the process of downshifting from the second gear to the first gear, the sliding sleeve 220 moves from the right station to the left station through the shift control unit, and the power is transmitted to the flexible disc 230 through the output shaft 150 of the drive motor, and then transmitted to the front planetary row sun through the flexible disc. Wheel 320, then transmitted to the rear planetary planetary gear 360 through the front planetary row planetary gear 330, then transmitted to the intermediate shaft 210 through the rear planetary row sun gear 350, and then transmitted to the drive gear 240 of the reducer through the intermediate shaft 210, and then decelerated The driven gear 370 is transmitted to the differential case 430, and the rotating differential case 430 drives the 25 differential bevel gear shaft 440 connected to it to rotate, and is installed on the differential bevel gear shaft 440 through a needle bearing The differential planetary bevel gear 460 revolves with the differential bevel gear shaft 440, and rotates with the rotation speed of the left and right half shafts to achieve a differential effect, and the differential planetary bevel gear 460 transmits power to the first meshing gear On the first differential bevel gear 450 and the second differential bevel gear 470, the first differential bevel gear 450 drives the differential left half shaft 410 to rotate and output power, and the second differential bevel gear 470 drives the differential The right half shaft 420 of the device rotates and outputs power to realize power transmission.

When in reverse gear, the drive motor reverses (opposite to the forward direction), and the sliding sleeve 220 is located at the left station. At this time, the planet carrier is fixed, and the power is transmitted to the flexible disc 230 through the drive motor output shaft 150, and then to the flexible disc 230. The front planetary row sun gear 320 is then transmitted to the rear planetary row planetary gear 360 through the front planetary row planetary gear 330, then transmitted to the intermediate shaft 210 through the rear planetary row sun gear 350, and then transmitted to the reducer gear 240 through the intermediate shaft 210, Then it is transmitted to the differential case 430 through the reducer driven gear 370, and the rotating differential case 430 drives the differential bevel gear shaft 450 connected to it to rotate, and is installed on the differential bevel gear shaft through needle roller bearings. The differential planetary bevel gear 460 on the 440 revolves with the differential bevel gear shaft 440, and rotates with the rotation speed of the left and right half shafts to achieve a differential effect, and the differential planetary bevel gear 460 transmits power to the meshing On the first differential bevel gear 450 and the second differential bevel gear 470, the first differential bevel gear 450 drives the differential left half shaft 410 to rotate and output power, and the second differential bevel gear 470 drives The right axle shaft 420 of the differential rotates and outputs power to realize power transmission in reverse gear.

When in neutral, the sliding sleeve 220 is in the middle position, the intermediate shaft 210 has no power input, and the power transmission is cut off.

When the vehicle needs to be braked while driving in first gear, the drive motor switches from the motor mode to the generator mode, which plays a role in dragging the transmission system and converts the driving kinetic energy of the vehicle into electrical energy.

When the vehicle needs to be braked while running in the second gear, the drive motor switches from the motor mode to the generator mode, and the sliding sleeve moves to the left station, which plays a dragging role on the transmission system and improves the recovery efficiency of braking energy.

The flexible disc 230 prevents the entire drive system from being completely rigidly connected during power transmission, reduces the impact of the system, and improves the service life of components.

The sliding sleeve shifting mechanism of the electric drive system works according to Table 1.

Table 1

"●" in Table 1 indicates the position of the sliding sleeve.

As shown in Figure 2, an upshift control method for an electric drive axle system based on a sliding sleeve shift transmission includes:

The first gear up to the second gear is divided into 5 stages: the shift motor starts, the sliding sleeve moves to the neutral position, the slip speed is controlled, the slip speed slope is controlled, and the sliding sleeve is located at the right station.

First, start the shift motor, and the shift motor works so that the sliding sleeve gradually moves to the neutral position. The speed sensor of the drive motor shaft judges whether the speed has dropped. When the speed of the drive motor drops, the input speed becomes smaller, and the planetary carrier starts to rotate. The slip speed drops rapidly, among which, the slip speed = the drive motor speed - the output shaft speed * the transmission ratio of the second gear,

Then, send a torque reduction request to the drive motor through CAN communication, and reduce the torque of the drive motor by a preset value of 50rpm. In the first stage, the sliding sleeve gradually moves to the right station, the slip speed is close to zero, and the sliding sleeve is completely in the right station, that is, it is combined with the intermediate shaft to complete the upshift operation.

As shown in Figure 3, a downshift control method for an electric drive axle system based on a sliding sleeve shift transmission includes:

When the opening of the accelerator pedal is not less than 30% of the preset value of the first opening, execute the first downshift process; Torque preset value 100Nm;

When the drive motor torque is not less than the second torque preset value 100Nm, execute the first downshift process (Power-on downshift process); when the drive motor torque is less than the second torque preset value 100Nm, judge that the accelerator pedal is on Whether the degree change rate is less than 15% of the second opening degree preset value;

When the change rate of the accelerator pedal opening is not less than 15% of the second opening preset value, the first downshift process (Power-on downshift process) is executed; %, execute the second downshift process (Power-off downshift process).

As shown in Figure 4, the first downshift process (Power-on downshift process) includes:

The power-on downshifting process is divided into five stages: the shifting motor start stage, the sliding sleeve moves to the neutral position, the driving motor shaft speed rises rapidly, the driving motor shaft speed change rate rapidly decreases, the sliding sleeve moves to the left and synchronizes .

First, the shift motor starts, the shift motor works to make the sliding sleeve move to the neutral position, the load of the drive motor decreases, and the speed of the drive motor increases rapidly;

Then, send a torque reduction request to the drive motor through CAN communication, and increase the torque of the drive motor by a preset value of 50rpm. When the speed of the drive motor increases to the preset value of 50rpm, the rate of change of the speed entering the drive motor shaft decreases rapidly , the sliding sleeve gradually moves to the left position, and the torque of the driving motor is quickly restored to the torque before shifting. At this time, the sliding sleeve is completely in the left position, that is, it is combined with the transmission housing to complete the downshift process.

As shown in Figure 5, the second downshift process (Power-off downshift process) includes:

The power-off downshift process is divided into 5 stages: the shift motor starts, the sliding sleeve moves to the neutral position, the slip speed is controlled, the slip speed slope is controlled, and the sliding sleeve is in the left position.

The shift motor is started, and the shift motor works to make the sliding sleeve gradually move to the neutral position, and the speed sensor of the drive motor shaft is used to judge whether the speed is rising. When the speed of the drive motor decreases, the input speed becomes smaller, the planetary carrier starts to rotate, the slip speed drops rapidly, and the slip speed drives the motor speed - output shaft speed * 1st gear transmission ratio

Then, send a request for torque reduction to the drive motor through CAN communication, increase the torque of the drive motor by a preset value of 50rpm, and when the slip speed drops to the preset value of 10rpm, it enters the stage of decreasing the rate of change of slip speed. The sliding sleeve gradually moves to the left station, and the slip speed is close to zero.

The sliding sleeve is completely in the left position, that is, it is combined with the transmission housing to complete the downshifting process.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Therefore, the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (10)

1. a kind of electric drive axle system based on sliding sleeve manual transmission, it is characterised in that including：

Case of transmission；

Motor, it is arranged on side in the transmission case body, and including driving motor output shaft；

Jackshaft, its one end is rotatably supported in the transmission case body, and reduction gearing is provided with the jackshaft；

Sliding sleeve gearshift, it is arranged on the case of transmission opposite side, rotatable to be set on the jackshaft, Neng Gouyan The jackshaft is slided, and being capable of case of transmission described in selective binding or the reduction gearing；

Planetary gear mechanism, it connects the motor axle and is fixed on middle part, the row in the transmission case body The planet carrier of star gear drive connects the sliding sleeve gearshift.

2. the electric drive axle system according to claim 1 based on sliding sleeve manual transmission, it is characterised in that the planet Gear drive, including：

Planet carrier, its is rotatable to be set on the jackshaft；

Planetary gear shaft, it is supported on the planet carrier；

Preceding planet row sun gear, its is rotatable to be set in the jackshaft other end；

Preceding planet rows of planetary wheel, it is set in the planetary gear shaft, is engaged with the preceding planet row sun gear；

Planet sun gear afterwards, its fixation is set on the jackshaft；

Planet row planetary gear afterwards, it is set in the planetary gear shaft, is engaged with the rear planet sun gear, and can be with institute Planet rows of planetary wheel coaxial rotating before stating.

3. the electric drive axle system according to claim 1 or 2 based on sliding sleeve manual transmission, it is characterised in that also wrap Flexible disk is included, its one end connects the motor axle, and the other end connects the preceding planet row sun gear.

4. the electric drive axle system according to claim 1 based on sliding sleeve manual transmission, it is characterised in that also including difference Fast device, it connects the jackshaft, including left half axle and right axle shaft, and the differential mechanism passes through left half to the output power after speed change Axle and right axle shaft output, the differential mechanism include：

Differential casing, it is connected with the jackshaft, for the power of planetary gear mechanism to be transmitted to differential mechanism；

Differential spider pinion shaft, it is connected with the differential carrier, and the differential spider pinion shaft is used to drive differential mechanism Planetary gear is revolved round the sun and rotation；

First differential bevel wheel, it engages with the differential pinion gear and is fixedly connected with the first output shaft, and described first Differential bevel wheel is used to drive the first output shaft rotation；

Second differential bevel wheel, it engages with the differential pinion gear and is fixedly connected with the second output shaft, and described second Differential bevel wheel is used to drive the second output shaft rotation；

When differential mechanism bevel gear shaft drives differential pinion gear to be revolved round the sun, the first output shaft and the second output shaft carry out constant speed Output；When differential mechanism bevel gear shaft drive differential pinion gear revolved round the sun and rotation, the second output shaft and the second output shaft Carry out differential output.

5. the electric drive axle system according to claim 4 based on sliding sleeve manual transmission, it is characterised in that also including institute State reduction gearing and connect the differential casing.

6. the electric drive axle system based on sliding sleeve manual transmission according to claim 1 or 5, it is characterised in that described Sliding sleeve gearshift includes：

Sliding sleeve, it is set on the jackshaft；

Shift motor, it connects the sliding sleeve upper end, for driving the sliding sleeve to be slided along the jackshaft.

7. a kind of upshift control method of the electric drive axle system based on sliding sleeve manual transmission, it is characterised in that including：

First, shift motor is started, driving sliding sleeve gearshift is gradually moved to centre position；

When the rotating speed of motor declines, input speed diminishes, and planet carrier starts to rotate, sliding sleeve slippage rotating speed rapid decrease, Motor torque reduces the first torque preset value simultaneously；

After slippage rotating speed drops to preset value, into the slippage relative speed variation decline stage, sliding sleeve is gradually moved to right working position, Slippage rotating speed is close to zero, and sliding sleeve is completely in right working position, completes upshift operation.

8. a kind of downshift control method of the electric drive axle system based on sliding sleeve manual transmission, it is characterised in that including：

When gas pedal aperture is not less than the first aperture preset value, the first downshift process is performed；When gas pedal aperture is less than the One aperture preset value, judges whether motor torque is less than the second torque preset value；

When motor torque is not less than the second torque preset value, the first downshift process is performed；When motor torque is less than the Two torque preset values, judge whether gas pedal aperture rate of change is less than the second aperture preset value；

When gas pedal aperture rate of change is not less than the second aperture preset value, the first downshift process is performed；When gas pedal aperture Rate of change is less than the second aperture preset value, performs the second downshift process.

9. the downshift control method of the electric drive axle system according to claim 8 based on sliding sleeve manual transmission, it is special Levy and be, the first downshift process includes：

First, shift motor is started, driving sliding sleeve gearshift is gradually moved to centre position；

Motor rotating speed rapid increase, motor rotating speed rate of change rapid decrease, sliding sleeve is to left movement and synchronously turns It is dynamic；Motor torque increases a preset value；

After motor rotating speed increases to preset value, into the rate of change rapid decrease of the rotating speed of motor axle, sliding sleeve by Gradually station is moved to the left, and motor torque is promptly restored into the torque before gearshift, and now sliding sleeve is completely in left station.

10. the downshift control method of the electric drive axle system according to claim 8 based on sliding sleeve manual transmission, it is special Levy and be, the second downshift process includes：

First, shift motor is started, driving sliding sleeve gearshift is gradually moved to centre position；Sliding sleeve is gradually moved to middle position.

Judge whether rotating speed rises by the speed probe of motor axle.When the rotating speed of motor declines, input turns Speed diminishes, and planet carrier starts to rotate, and motor torque is increased a preset value by slippage rotating speed rapid decrease.When slippage turns Speed drops to after preset value, into the slippage relative speed variation decline stage, and gradually station is moved this stage sliding sleeve to the left, and slippage turns Speed is close to zero, and sliding sleeve is completely in left station.