CN219727845U - Dual-motor distributed electric drive bridge and vehicle - Google Patents

Abstract

The utility model provides a double-motor distributed electric drive bridge and a vehicle, wherein the electric drive bridge comprises: the first motor and with the gear system of first motor matching, the second motor and with the gear system of second motor matching, wherein, first motor and second motor all use the axle axis to be symmetrical arrangement as the center, still include: the first half shaft and the second half shaft are respectively arranged on the axle shaft line and are mutually independent. The utility model adopts a three-stage speed-reducing distributed transmission route, has fewer transmission stages and high efficiency, and is easy to realize larger gear ratio. The space structure has symmetry and reasonable mass distribution, thereby improving the vibration resistance of the system; meanwhile, the left half shaft and the right half shaft are independently driven by two paths of motors and gear shafting thereof, so that the distributed driving effect is realized, and the driving system has more controllability and dynamic redundancy; meanwhile, the electric drive bridge gear shifting mechanism has a two-gear shifting function, and gear shifting power of the electric drive bridge is not interrupted in a mode of alternately shifting left and right wheels.

Description

Dual-motor distributed electric drive bridge and vehicle

Technical Field

The utility model relates to the technical field of drive axles, in particular to a dual-motor distributed electric drive axle and a vehicle.

Background

The heavy truck driving axle structure mainly transmits the engine torque transmitted by the universal transmission device to driving wheels through a main speed reducer, a differential mechanism, a half shaft and the like, so that the speed reduction and the torque increase are realized. The electric drive bridge structure integrates a motor on a bridge, replaces the original universal transmission device and an engine, directly outputs motor power to wheels through a speed change mechanism on the bridge, and is developed into a centralized electric drive bridge and a distributed electric drive bridge at present.

In the prior art solutions involving a distributed motor drive axle, one solution is to arrange two motors coaxially and symmetrically on the axle central axis, and the two motors transmit power to the wheel end after passing through respective reduction gear. However, the whole electric drive bridge of the scheme has only one fixed gear ratio, the internal space of the electric drive bridge structure is narrow, the oil stirring loss is large, and the heat is not easy to dissipate; meanwhile, the fixed gear ratio is difficult to effectively adapt to the operation requirement of complex road working conditions, and the total efficiency of the two-stage planetary gear transmission is low.

The other scheme is that two motors are coaxially and symmetrically arranged on the central axis of the axle, power is transmitted to the wheel end after the two motors pass through the respective speed reducing devices, and the two motors are only provided with one-stage planetary gear speed reducing mechanism and are arranged in hubs at two ends of the axle, so that a fixed gear ratio is realized. However, due to the limitation of the size of the hub, the speed ratio of the speed reduction planetary gear cannot be too large, so that a motor with larger torque is required to meet the requirement of the output torque of the whole bridge, and the matching cost of the motor and the electric control is higher. Meanwhile, the fixed gear ratio cannot well meet the complex road condition requirements.

The third scheme is that a planetary gear mechanism is adopted to realize gear shifting of a second gear mechanism, however, the gear shifting mechanism is limited by the technical characteristics of a planetary gear, the inter-gear speed step ratio is often larger, and the suppression of gear shifting impact is not facilitated; two-stage planetary rows are needed to realize a larger speed ratio, and the transmission efficiency of the system is lower.

Disclosure of Invention

Aiming at the problems, the utility model discloses a double-motor distributed electric drive bridge and a vehicle, which aim to achieve reasonable space mass distribution, improve the vibration resistance of a system, realize a larger gear ratio with a minimum transmission stage number, realize the aim of improving the transmission efficiency and matching with a small torque motor, and simultaneously have larger internal space, thereby being convenient for reducing the oil stirring loss of the system and reducing the heating; the controllability and redundancy of a driving system are improved in a distributed driving mode, the structure is more compact, and the technical effect of no power interruption of gear shifting can be achieved.

To achieve the above object, a first aspect of the present utility model provides a dual-motor distributed electric drive bridge, the electric drive bridge comprising:

a first motor and a gear shaft system matched with the first motor,

the second motor and the gear shafting matched with the second motor, wherein the first motor and the second motor are symmetrically arranged by taking the axle axis as the center,

Further comprises: a first half shaft and a second half shaft respectively arranged on the axle axis, wherein the first half shaft and the second half shaft are mutually independent,

the first motor drives the first half shaft through a gear shaft system matched with the first motor, and the second motor drives the second half shaft through a gear shaft system matched with the second motor.

Further, the first motor is connected with the first gear driving gear on the first side and the second gear driving gear on the first side through a shaft of the first motor, the second motor is connected with the first gear driving gear on the second side and the second gear driving gear on the second side through a shaft of the second motor, and the two shafts on the first motor side and the second motor side are arranged by taking an axle axis as a center.

Further, the method further comprises the following steps: a first-gear driven gear and a second-gear driven gear which are arranged on the two shafts at one side of the first motor, and a first-gear driven gear and a second-gear driven gear which are arranged on the two shafts at one side of the second motor,

the gear shifting gear hub of the side gear shifting is rigidly integrated on the two shafts on one side of the first motor, and the gear shifting gear hub of the side gear shifting is rigidly integrated on the two shafts on one side of the second motor;

The first-gear driven gear and the second-gear driven gear on one side of the first motor are respectively arranged on two sides of the gear shifting gear hub on the first side, the first-gear driven gear and the second-gear driven gear on one side of the second motor are respectively arranged on two sides of the gear shifting gear hub on the second side,

the two shafts at one side of the first motor are driven by the first-gear driven gear and the second-gear driven gear at one side of the first motor, the two shafts at one side of the second motor are respectively driven by the first-gear driven gear and the second-gear driven gear at one side of the second motor,

the first-gear driven gear on one side of the first motor is meshed with the first-gear driving gear on one side of the first motor, and the second-gear driven gear on one side of the first motor is meshed with the second-gear driving gear on one side of the first motor;

the first-gear driven gear on one side of the second motor is meshed with the first-gear driving gear on the second side, and the second-gear driven gear on one side of the second motor is meshed with the second-gear driving gear on the second side.

Further, the method further comprises the following steps: a first motor side main reduction pinion gear as an output gear of the first motor side biaxial, and a first motor side main reduction bull gear as an input gear of the first half shaft,

The main speed reduction pinion on one side of the first motor is rigidly connected with the two shafts on one side of the first motor, and the main speed reduction pinion on one side of the first motor is meshed with the main speed reduction bull gear on one side of the first motor;

further comprises: a main reduction pinion gear on the side of the second motor, and a main reduction bull gear on the side of the second motor, wherein the main reduction pinion gear on the side of the second motor is used as an output gear of a two-shaft on the side of the second motor, the main reduction bull gear on the side of the second motor is used as an input gear of the second half shaft,

the main speed reducing pinion on one side of the second motor is rigidly connected with the two shafts on one side of the second motor, and the main speed reducing pinion on one side of the second motor is meshed with the main speed reducing bull gear on one side of the second motor.

Further characterized in that a first side of the decelerating planetary row assembly is arranged on the first half shaft at one side of the first motor, a second side of the decelerating planetary row assembly is arranged on the second half shaft at one side of the second motor,

the first side decelerating planet row assembly and the second side decelerating planet row assembly are uniformly distributed on the axle axis.

Further, the first-side speed reduction planetary gear assembly comprises a first-side sun gear, first-side planetary gears, a first-side inner gear ring and a first-side planetary gear frame, wherein the first-side inner gear ring is rigidly and fixedly connected with the electric drive axle housing, the first-side sun gear receives power from the first half axle to generate rotary motion, and the first-side planetary gears are uniformly arranged around the axle axis, can revolve around the first-side sun gear and rotate relative to the first-side planetary gear frame;

the second side speed reduction planetary gear assembly comprises a second side sun gear, a second side planetary gear, a second side annular gear and a second side planetary gear frame, wherein the second side annular gear is rigidly and fixedly connected with the electric drive axle housing, the second side sun gear receives power from the second half axle to generate rotary motion, and the second side planetary gear is uniformly arranged around the axle axis and can revolve around the second side sun gear and rotate relative to the second side planetary gear frame.

Further, the first side sun gear is rigidly connected with a main reduction gear wheel on one side of the first motor, and the first side planet wheel frame is connected with the first half shaft;

The second side sun gear is rigidly connected with the main reduction gear wheel on one side of the second motor, and the second side planet wheel frame is connected with the second half shaft.

Further, a first side gear shifting combination sleeve and a first side gear shifting gear hub are arranged on a two-shaft on one side of the first motor, and a second side gear shifting combination sleeve and a second side gear shifting gear hub are arranged on a two-shaft on one side of the second motor;

the gear shifting combination of the first side can reciprocally slide to a first position, a second position and a first N position between the first position and the second position on the gear shifting gear hub of the first side under the action and control of an external actuating mechanism of the gear shifting combination sleeve;

when the gear shifting combination sleeve on the first side is at a first position, one side of the first motor is in a first gear working state, when the gear shifting combination sleeve on the first side is at a second position, one side of the first motor is in a second gear working state, and when the gear shifting combination sleeve on the first side is at a first N position, one side of the first motor is in a neutral gear working state for disengaging power output;

the gear shifting combination sleeve at the second side can reciprocally slide to a third position, a fourth position and a second N position on the gear shifting gear hub at the second side under the action and control of an actuating mechanism at the outer part of the gear shifting combination sleeve;

When the gear-shifting combination sleeve of the second side is at the third position, one side of the second motor is in a first gear working state, when the gear-shifting combination sleeve of the second side is at the fourth position, one side of the second motor is in a second gear working state, and when the gear-shifting combination sleeve of the second side is at the second N position, one side of the second motor is in a neutral gear working state for disengaging power output.

Further, when the double-motor distributed electric drive bridge works in a first gear, one side of the first motor and one side of the second motor are both in a first gear working state, and the gear ratios of the first gear and the first gear on one side of the second motor are the same;

when the double-motor distributed electric drive bridge works in a second gear, one side of the first motor and one side of the second motor are both in a second gear working state, and the gear ratios of the second gears on one side of the first motor and one side of the second motor are the same;

when the double-motor distributed electric drive bridge is in neutral gear, one side of the first motor and one side of the second motor are both in a neutral gear working state, and power on one side of the first motor and power on one side of the second motor are not output;

when the double-motor distributed electric drive bridge is shifted from first gear to second gear or from second gear to first gear, a mode of short-time alternate gear shifting of the left motor and the right motor is adopted to realize the gear shifting of the whole electric drive bridge without power interruption,

When the double-motor distributed electric drive bridge shifts from a first gear to a second gear, a motor running on one side of the wheel and a gear shaft system matched with the motor on the side are driven to shift, so that the torque of the motor on the side is actively reduced to a smaller value or zero, a gear shifting mechanism on the side starts to move a gear shifting joint sleeve to disengage from a first gear position, then the motor on the side is subjected to speed regulation until a proper rotating speed value is reached, and the gear shifting joint sleeve on the side is further pushed to a second gear position, so that gear shifting is completed; at the moment, a motor for driving the wheels on the other side and a gear shaft system matched with the motor on the other side do not shift, and bear part or all of the whole-axle torque output requirement, after the first side is shifted, the second side motor and the gear shaft system matched with the second side motor start to carry out shifting operation, when the second side motor shifts, the torque is reduced to zero or a smaller value, then a shifting mechanism on the side starts to move a shifting joint sleeve, a first gear position is disengaged, then the second side motor is subjected to speed regulation until a proper rotating speed value is reached, and the side shifting joint sleeve is further pushed to a second gear position, so that shifting is completed;

when the two-motor distributed electric drive bridge is shifted to a first gear, a motor running on one side of the wheel and a gear shaft system matched with the motor on the side are driven to shift, so that the torque of the motor on the side is actively reduced to a smaller value or zero, a shifting mechanism on the side starts to move a shifting joint sleeve to disengage from a second gear position, then the motor on the side is subjected to speed regulation until a proper rotating speed value is reached, and the shifting joint sleeve on the side is further pushed to a first gear position, so that the shifting is completed; at the moment, a motor for driving the wheels on the other side and a gear shaft system matched with the motor on the other side do not shift, and bear part or all of the whole-axle torque output requirement, after the first side is shifted, the second side motor and the gear shaft system matched with the second side motor start to carry out shifting operation, when the second side motor shifts, the torque is reduced to zero or a smaller value, then a shifting mechanism on the side starts to move a shifting joint sleeve, a second gear position is disengaged, then the second side motor is subjected to speed regulation until a proper rotating speed value is reached, and the side shifting joint sleeve is further pushed to a first gear position, so that shifting is completed;

When the double-motor distributed electric drive bridge drives the vehicle to steer, the torque and the rotation speed of the wheels at the two sides during steering are reasonably distributed through the adjustment of the torque and the rotation speed of the first motor and the second motor, so that the torque and the rotation speed of the wheels at the outer side during steering are properly increased, and the torque and the rotation speed of the wheels at the inner side are properly reduced;

when one side motor of the double-motor distributed electric drive bridge fails, the other side motor and a gear shafting matched with the side motor can still drive the whole vehicle to run at half power.

A second aspect of the application provides a vehicle comprising a dual-motor distributed electrically driven axle as claimed in any one of the first aspects above.

The application has the advantages and beneficial effects that: firstly, by symmetrically arranging two-gear distributed electric drive bridges in front and back of an axle axis, the mass distribution is reasonable, the structure is compact, the internal space of the electric drive bridge is increased, the oil stirring loss of a system is reduced, and the vibration resistance of the system is improved; secondly, the first half shaft and the second half shaft are respectively arranged on the axle axis, so that the distributed independent driving of the left and right wheels is realized, the first motor can drive the first half shaft through a gear shaft system matched with the first motor, the second motor can drive the second half shaft through a gear shaft system matched with the second motor, and the transmission efficiency and the controllability of a driving system are improved; meanwhile, a mechanical differential mechanism is omitted, and an electronic differential control mode is adopted, so that the weight is reduced, and independent vectorization control of driving wheels is facilitated. Finally, through the mode of arranging the gearshift at the diaxon, the power of shifting is not too big, and the rotational speed of shifting is not too high, has not only promoted the reliability of gearshift, has reduced system cost moreover.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic diagram of a dual-motor distributed electric drive bridge according to an embodiment of the present utility model;

FIG. 2 is a second schematic diagram of a dual-motor distributed electric drive bridge according to an embodiment of the present utility model;

fig. 3 is a third schematic structural view of a dual-motor distributed electric drive bridge according to an embodiment of the present utility model.

In the figure: 1. the electric drive bridge shell and the support structure fixedly connected with the electric drive bridge shell; 2. a first motor; 3. a second gear driving gear at the first side; 4. a shaft at one side of the first motor; 5. a first gear driving gear on the first side; 6. a first-gear driven gear at one side of the first motor; 7. a shift coupling sleeve on the first side; 8. a gear shift two-shaft (integrated gear shift gear hub) at one side of the first motor; 9. a first side planet wheel frame; 10. a first side sun gear; 11. a first half shaft; 12. a first side planet; 13. a main reduction gear wheel at one side of the first motor; 14. a gear shifting two-shaft (integrated gear shifting gear hub) at one side of the second motor; 15. a shift coupling sleeve on the second side; 16. a first-gear driven gear at one side of the second motor; 17. a first gear driving gear on the second side; 18. a shaft at one side of the second motor; 19. a second gear driving gear on the second side; 20. a second motor; 21. a second-gear driven gear at one side of the second motor; 22. a main reduction pinion on one side of the second motor; 23. a second side ring gear; 24. a main reduction gear wheel at one side of the second motor; 25. a second side sun gear; 26. a second half shaft; 27. a second side planet wheel frame; 28. a second side planet; 29. a first side ring gear; 30. a main reduction pinion on one side of the first motor; 31. and a second-gear driven gear at one side of the first motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The following describes in detail the technical solutions provided by the embodiments of the present utility model with reference to the accompanying drawings.

Referring to fig. 1, in one embodiment of the present utility model, a dual-motor distributed electric drive bridge is provided, the electric drive bridge comprising: the first motor 2 and the gear shaft system matched with the first motor, the second motor 20 and the gear shaft system matched with the second motor, wherein the first motor 2 and the second motor 20 are symmetrically arranged by taking an axle axis as a center.

On one hand, the electric drive axle comprises double motors and gear shafting matched with the motors by taking the axle axis as the center, so that the mass distribution of the assembly is reasonable; the center of mass of the electric drive bridge is close to the theoretical coaxiality with the axle housing axis, so that the stress and vibration conditions are better improved; on the other hand, the structure is beneficial to increasing the internal space of the electric drive bridge, is convenient to reduce the oil stirring loss of the system and the heating of the system, and is beneficial to distributing special lubricating and heat dissipation oil ways and other structures.

In this embodiment, the electrically driven bridge further includes: the first half shaft 11 is an assembly left half shaft, and the second half shaft 26 is an assembly right half shaft, which are respectively arranged on the axle shaft line, and are shown in combination with fig. 1-3. The first half shaft 11 and the second half shaft 26 are independent of each other, the first motor 2 drives the first half shaft 11 through a gear shaft system matched with the first motor, and the second motor 20 drives the second half shaft 26 through a gear shaft system matched with the second motor. According to the embodiment of the application, through the distributed independent driving design of the left wheel and the right wheel, the controllability of a driving system and the operation stability of a vehicle are improved, and the problem of lower transmission efficiency in the prior art is solved.

It will be understood that in the figures, "motor a" is a first motor, "motor B" is a second motor, and that "first side" is referred to as "motor a side" and "second side" is referred to as "motor B side" in the embodiments of the present application.

The motor a and the motor B do not necessarily have the same power characteristics, nor do they necessarily have the same size and weight. Motors a, B having the same power characteristics, or the same size or the same weight, are just one possible specific embodiment, and are not particularly limited in the embodiments of the present application.

Further, the first motor 2 is connected to the first gear driving gear 5 on the first side and the second gear driving gear 3 on the first side through the first shaft 4 on the first motor side, the second motor 20 is connected to the first gear driving gear 17 on the second side and the second gear driving gear 19 on the second side through the first shaft 18 on the second motor side, and the gear shifting two shafts 8 on the first motor side and the gear shifting two shafts 14 on the second motor side are arranged on the front side and the rear side with the axle axis as the center, and it can be understood that the gear shifting hubs are integrated on the gear shifting two shafts on the first motor side and the second motor side.

Further, in an embodiment of the present application, the electrically driven bridge further includes: the first motor side first gear driven gear 6 and the first motor side second gear driven gear 31 are arranged on the first motor side second shaft, and the second motor side first gear driven gear 16 and the second motor side second gear driven gear 21 are arranged on the second motor side second shaft.

The first-gear driven gear 6 on the first motor side and the second-gear driven gear 31 on the first motor side are respectively arranged on two sides of the gear shifting gear hub on the first side, and the first-gear driven gear 16 on the second motor side and the second-gear driven gear 21 on the second motor side are respectively arranged on two sides of the gear shifting gear hub on the second side.

In the present embodiment, the first motor side shift two shaft 8 is driven by the first motor side first gear driven gear 6 and the first motor side second gear driven gear 31, and the second motor side shift two shaft 14 is driven by the second motor side first gear driven gear 16 and the second motor side second gear driven gear 21, respectively;

meanwhile, as can be seen from fig. 1 to 3, the first-gear driven gear 6 on the first motor side is meshed with the first-gear driving gear 5 on the first side, and the second-gear driven gear 31 on the first motor side is meshed with the second-gear driving gear 3 on the first side; the first-gear driven gear 16 on the second motor side is meshed with the first-gear driving gear 17 on the second side, and the second-gear driven gear 21 on the second motor side is meshed with the second-gear driving gear 19 on the second side.

Further, the electrically driven bridge further includes: a first motor-side main reduction pinion 30, and a first motor-side main reduction bull gear 13, wherein the first motor-side main reduction pinion 30 serves as an output gear of the first motor-side biaxial, the first motor-side main reduction bull gear 13 serves as an input gear of the first half shaft, the first motor-side main reduction pinion 30 is rigidly connected with the first motor-side shift biaxial 8, and the first motor-side main reduction pinion 30 is meshed with the first motor-side main reduction bull gear 13;

Correspondingly, the electric drive bridge further comprises: a second motor-side main reduction pinion 22, and a second motor-side main reduction bull gear 24, wherein the second motor-side main reduction pinion 22 serves as an output gear of the second motor-side biaxial, the second motor-side main reduction bull gear 24 serves as an input gear of the second half shaft, the second motor-side main reduction pinion 22 is rigidly connected with the second motor-side shift spindle 14, and the second motor-side main reduction pinion 22 is meshed with the second motor-side main reduction bull gear 24.

From the above, the electric drive bridge provided by the embodiment of the application adopts a mode of arranging the gear shifting mechanism on the two shafts, so that the rotating speed is not too high, the torque is not too high, the design of selecting the gear shifting mechanism is facilitated, and meanwhile, the rotating speed of the pinion gear which runs idle in the first gear during the second gear working is not too high, so that the reliability of the gear shifting mechanism is improved.

In some embodiments of the present application, referring to fig. 1-3, a first side of the reduction planetary row assembly is disposed on the first half shaft 11 on the first motor side, a second side of the reduction planetary row assembly is disposed on the second half shaft 26 on the second motor side, and the first side of the reduction planetary row assembly and the second side of the reduction planetary row assembly are uniformly disposed on the axle axis.

Further, the first-side decelerating planet row assembly comprises a first-side sun gear 10, a first-side planet gear 12, a first-side inner gear ring 29 and a first-side planet gear frame 9, wherein the first-side inner gear ring 29 is rigidly and fixedly connected with the electric drive axle housing and the support structure 1 fixedly connected with the electric drive axle housing, and does not rotate relatively; the first side sun gear 10 receives power from the first half shaft 11 to generate rotary motion, the first side planet gears 12 are uniformly arranged around the axle axis, can revolve around the first side sun gear 10 and rotate relative to the first side planet gear frame 9;

the second-side decelerating planet row assembly comprises a second-side sun gear 25, a second-side planet wheel 28, a second-side inner gear ring 23 and a second-side planet wheel frame 27, wherein the second-side inner gear ring 23 is rigidly and fixedly connected with the electric drive axle housing and the fixedly connected supporting structure 1, and does not rotate relatively, the second-side sun gear 25 receives power from the second half axle 26 to generate rotary motion, and the second-side planet wheel 28 is uniformly arranged around the axle axis, can revolve around the second-side sun gear 25 and rotates relative to the second-side planet wheel frame 27.

Further, the first side sun gear 10 is rigidly connected with a main reduction gear 13 at one side of the first motor, and the first side planet gear frame 9 is connected with the first half shaft 11; the second-side sun gear 25 is rigidly connected to the main reduction gear 24 on the second motor side, and the second-side planet gear frame 27 is connected to the second half shaft 26.

In some embodiments of the present application, as shown in fig. 1 to 3, a first side shift coupling sleeve 7 and a first side shift hub (not shown) are disposed on the first motor side shift spindle 8, and a second side shift coupling sleeve 15 and a second side shift hub (not shown) are disposed on the second motor side shift spindle 14; the gear shifting combining sleeve is connected with the gear shifting gear hub through a spline.

The gear shifting combination of the first side can reciprocally slide to a first position (1 'position in the figure), a second position (2' position in the figure) and a first N position (neutral position of a first motor) between the first position and the second position on the gear shifting gear hub of the first side under the action and control of an external actuating mechanism (such as pneumatic, hydraulic or electric and the like);

It will be appreciated that the first motor side is in a first gear operating condition when the first side shift coupling sleeve 7 is in a first position (position '1' in the drawing), the first motor side is in a second gear operating condition when the first side shift coupling sleeve 7 is in a second position (position '2' in the drawing), and the first motor side is in a neutral gear operating condition for disengaging the power output when the first side shift coupling sleeve 7 is in a first N position;

likewise, the second-side shift coupling sleeve 15 can slide reciprocally on the second-side shift hub to a third position (3 'position in the figure), a fourth position (4' position in the figure) and a second N position (neutral position of the second motor) under the action and control of its external actuating mechanism;

the second motor side is in a first gear operating state when the second side shift coupling sleeve 15 is in a third position (3 'position in the drawing), the second motor side is in a second gear operating state when the second side shift coupling sleeve 15 is in a fourth position (4' position in the drawing), and the second motor side is in a neutral gear operating state for disengaging the power output when the second side shift coupling sleeve 15 is in a second N position. It will be appreciated that the first or second gear described above is by way of example only and is not intended to be limiting of the specific gear control.

Further, in the embodiment of the present application, modes of the two-motor two-gear shift position relationship at least include:

when the double-motor distributed electric drive bridge works in a first gear, one side of the first motor and one side of the second motor are in a first gear working state, and the gear ratios of the first motor and the second motor are completely the same;

when the double-motor distributed electric drive bridge works in a second gear, one side of the first motor and one side of the second motor are both in a second gear working state, and the gear ratios of the second gears on one side of the first motor and one side of the second motor are completely the same;

when the double-motor distributed electric drive bridge is in neutral gear, one side of the first motor and one side of the second motor are both in a neutral gear working state, and power on one side of the first motor and power on one side of the second motor are not output;

when the double-motor distributed electric drive bridge is shifted from first gear to second gear or from second gear to first gear, a mode of short-time alternate gear shifting of the left motor and the right motor can be adopted, and the whole electric drive bridge can be shifted without power interruption.

When the double-motor distributed electric drive bridge shifts from a first gear to a second gear, a motor running on one side of the wheel and a gear shaft system matched with the motor on the side are driven to shift, so that the torque of the motor on the side is actively reduced to a smaller value or zero, a gear shifting mechanism on the side starts to move a gear shifting joint sleeve to disengage from a first gear position, then the motor on the side is subjected to speed regulation until a proper rotating speed value is reached, and the gear shifting joint sleeve on the side is further pushed to a second gear position, so that gear shifting is completed; at the moment, a motor for driving the wheels on the other side and a gear shaft system matched with the motor on the other side do not shift, and bear part or all of the whole-axle torque output requirement, after the first side is shifted, the second side motor and the gear shaft system matched with the second side motor start to carry out shifting operation, when the second side motor shifts, the torque is reduced to zero or a smaller value, then a shifting mechanism on the side starts to move a shifting joint sleeve, a first gear position is disengaged, then the second side motor is subjected to speed regulation until a proper rotating speed value is reached, and the side shifting joint sleeve is further pushed to a second gear position, so that shifting is completed;

When the two-motor distributed electric drive bridge is shifted to a first gear, a motor running on one side of the wheel and a gear shaft system matched with the motor on the side are driven to shift, so that the torque of the motor on the side is actively reduced to a smaller value or zero, a shifting mechanism on the side starts to move a shifting joint sleeve to disengage from a second gear position, then the motor on the side is subjected to speed regulation until a proper rotating speed value is reached, and the shifting joint sleeve on the side is further pushed to a first gear position, so that the shifting is completed; at the moment, a motor for driving the wheels on the other side and a gear shaft system matched with the motor on the other side do not shift, and bear part or all of the whole-axle torque output requirement, after the first side is shifted, the second side motor and the gear shaft system matched with the second side motor start to carry out shifting operation, when the second side motor shifts, the torque is reduced to zero or a smaller value, then a shifting mechanism on the side starts to move a shifting joint sleeve, a second gear position is disengaged, then the second side motor is subjected to speed regulation until a proper rotating speed value is reached, and the side shifting joint sleeve is further pushed to a first gear position, so that shifting is completed;

when the double-motor distributed electric drive axle drives the vehicle to turn, the vertical loads of the left and right wheels change due to the centrifugal force of the load of the whole vehicle, at the moment, the driving torques and the rotating speeds of the wheels at the two sides can be reasonably distributed through adjusting the torques and the rotating speeds of the motors at the two sides, generally, the control effect is that the torques and the rotating speeds of the wheels at the outer side of the steering are properly increased, the torques and the rotating speeds of the wheels at the inner side are properly reduced, and the control stability and the rationality of power distribution of the whole vehicle can be improved through adjusting the torques and the rotating speeds of the driving wheels at the two sides.

When one side of the double-motor distributed electric drive bridge fails, the other side of the double-motor distributed electric drive bridge and the shaft system of the double-motor distributed electric drive bridge can still drive the whole vehicle to run at half power, namely, the system power has redundancy.

Therefore, the control of the motors and the gear shifting mechanisms on two sides can be used for adapting to the running requirements of different road conditions. Of course, the various modes of operation described above are for convenience of illustration only and are not to be construed as limiting the application.

As can be seen from the above, in the embodiment of the present application, the transmission directions of the power generated by the dual motors are respectively:

the power sent by the first motor 2 is respectively transmitted to the first-side first-gear driving gear 5 and the first-side second-gear driving gear 3 through the first shaft 4 at the first motor side, and is respectively transmitted to the first-side gear shifting hub of the two-gear shifting executing mechanism on the second shaft at the first motor side and the first-side gear shifting combining sleeve 7 through the first-motor-side first-gear driven gear 6 and the first-motor-side second-gear driven gear 31, and then is transmitted to the first half shaft 11 and then is output to the wheel end through the first-motor-side output gear (the first-motor-side main reduction pinion 30) and the first-motor-side main reduction gear 13;

The power generated by the second motor 20 is transmitted to the first gear driving gear 17 on the second side and the second gear driving gear 19 on the second side through the first shaft 18 on the second motor side, and is transmitted to the second gear hub of the second gear shifting actuator on the second shaft on the second motor side and the gear shifting combining sleeve 15 on the second side through the first gear driven gear 16 on the second motor side and the second gear driven gear 21 on the second motor side, and is then transmitted to the second half shaft 26 and then output to the wheel end through the output gear (the main reduction pinion 22 on the second motor side) on the second shaft on the second motor side and the main reduction gear 24 on the second motor side.

Therefore, the three-stage speed reduction transmission route is adopted, so that the distributed independent driving of the left wheel and the right wheel is realized, the transmission efficiency is improved, the gear ratio is increased, the matching of the small torque motor is facilitated, and the system cost is further reduced.

It is noted that the embodiment of the application adopts an electronic differential mode, namely, the control of left and right half shafts of the assembly is realized through an electronic differential mechanism.

Therefore, the application omits the design of a mechanical differential mechanism and adopts an electronic differential mechanism mode, not only reduces the weight of the electric drive axle, but also ensures better controllability of power on the left side and the right side, is convenient for independent vectorization control of the driving wheels, and is beneficial to improving the steering stability of the vehicle and the trafficability of complex road conditions.

In addition, based on the structure shown in fig. 1, the relative positional relationship between the two reduction planetary gear assemblies and the biaxial gear shaft system structure inside the electric drive axle according to the embodiment of the application can be flexibly arranged, and particularly as shown in fig. 2 and 3.

For example, in fig. 1, the first side reduction planetary row assembly is located at a left side position of the first motor side biaxial output gear, and the second side reduction planetary row assembly is located at a right side position of the second motor side biaxial output gear; in fig. 2, the first side reduction planetary row assembly is located at a right side position of the first motor side two-shaft output gear, and the second side reduction planetary row assembly is located at a left side position of the second motor side two-shaft output gear; similarly, in fig. 3, the first side reduction planetary row assembly and the second side reduction planetary row assembly are respectively positioned at left and right sides of the first motor and the second motor two-shaft output gear, but unlike fig. 1, the first motor side two-shaft output gear (main reduction pinion) and the main reduction gear are integrally designed at the left side of the two shafts (right side in fig. 1), and the second motor side two-shaft output gear (main reduction pinion) and the main reduction gear are integrally designed at the right side of the two shafts.

It should be understood, of course, that the positional relationship of the various gear shafts illustrated in fig. 1-3 is not to be construed as limiting the application, and that other embodiments may be formed as would be understood by one of skill in the art depending on the particular implementation scenario.

In some embodiments of the application, a vehicle is also presented, the vehicle comprising a two-motor distributed electrically driven bridge as described in any of the above. It can be understood that the vehicle adopting the double-motor distributed electric drive bridge design can be suitable for the running requirements of different road conditions, so that the gear shifting quality of the vehicle is improved, the running service life of a gear shifting element and the dynamic property of the vehicle are prolonged, and the use cost is saved.

In summary, this embodiment provides a dual-motor distributed electric drive bridge, which includes: the device comprises a first motor, a gear shaft system matched with the first motor, a second motor and a gear shaft system matched with the second motor, wherein the first motor and the second motor are symmetrically arranged by taking an axle axis as a center; firstly, by symmetrically arranging two-gear distributed electric drive bridges in front and back of an axle axis, the mass distribution is reasonable, the structure is compact, the internal space of the electric drive bridge is increased, the oil stirring loss of a system is reduced, and the vibration resistance of the system is improved; secondly, the first half shaft and the second half shaft are respectively arranged on the axle axis, so that the distributed independent driving of the left and right wheels is realized, the first motor can drive the first half shaft through a gear shaft system matched with the first motor, the second motor can drive the second half shaft through a gear shaft system matched with the second motor, the transmission efficiency and the controllability of a driving system are improved, the left and right half shafts are independently driven by the two motors and the gear shaft system thereof, the distributed driving effect is realized, and the driving system has more controllability and power redundancy; meanwhile, a mechanical differential mechanism is omitted, and an electronic differential control mode is adopted, so that the weight is reduced, and the independent vectorization control of the driving wheels is facilitated. Finally, through the mode of laying gearshift at the diaxon, possess two and keep off the function of shifting gears, realize through the mode of controlling the wheel and shift gears in turn that the electricity drives the bridge and shift gears power and not break, the design of selecting a type of gearshift of being convenient for, more be favorable to increasing gear ratio, be convenient for match little moment of torsion motor, not only promoted the reliability of gearshift, reduced system cost moreover.

It should be noted that, in the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" is two or more.

In the present utility model, unless explicitly specified and limited otherwise, terms such as "connected," "fixed" and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description of the terms "one embodiment," "some embodiments," "one embodiment," "example," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely a specific embodiment of the utility model and other modifications and variations can be made by those skilled in the art in light of the above teachings. It is to be understood by persons skilled in the art that the foregoing detailed description is provided for the purpose of illustrating the utility model more fully, and that the scope of the utility model is defined by the appended claims.

Claims (10)

1. A dual-motor distributed electric drive bridge, the electric drive bridge comprising:

a first motor and a gear shaft system matched with the first motor,

The second motor and the gear shafting matched with the second motor, wherein the first motor and the second motor are symmetrically arranged by taking the axle axis as the center,

further comprises: a first half shaft and a second half shaft respectively arranged on the axle axis, wherein the first half shaft and the second half shaft are mutually independent,

the first motor drives the first half shaft through a gear shaft system matched with the first motor, and the second motor drives the second half shaft through a gear shaft system matched with the second motor.

2. The dual-motor distributed electric drive axle of claim 1, wherein the first motor is connected to the first gear driving gear on the first side and the second gear driving gear on the first side through a first shaft of the first motor, the second motor is connected to the first gear driving gear on the second side and the second gear driving gear on the second side through a first shaft of the second motor, and the two shafts on the first motor side and the second motor side are arranged with axle axes as centers.

3. The dual motor distributed electric drive bridge of claim 2, further comprising: a first-gear driven gear and a second-gear driven gear which are arranged on the two shafts at one side of the first motor, and a first-gear driven gear and a second-gear driven gear which are arranged on the two shafts at one side of the second motor,

The gear shifting gear hub of the side gear shifting is rigidly integrated on the two shafts on one side of the first motor, and the gear shifting gear hub of the side gear shifting is rigidly integrated on the two shafts on one side of the second motor;

the first-gear driven gear and the second-gear driven gear on one side of the first motor are respectively arranged on two sides of the gear shifting gear hub on the first side, the first-gear driven gear and the second-gear driven gear on one side of the second motor are respectively arranged on two sides of the gear shifting gear hub on the second side,

the two shafts at one side of the first motor are driven by the first-gear driven gear and the second-gear driven gear at one side of the first motor, the two shafts at one side of the second motor are respectively driven by the first-gear driven gear and the second-gear driven gear at one side of the second motor,

the first-gear driven gear on one side of the first motor is meshed with the first-gear driving gear on one side of the first motor, and the second-gear driven gear on one side of the first motor is meshed with the second-gear driving gear on one side of the first motor;

the first-gear driven gear on one side of the second motor is meshed with the first-gear driving gear on the second side, and the second-gear driven gear on one side of the second motor is meshed with the second-gear driving gear on the second side.

4. The dual motor distributed electric drive bridge of claim 3, further comprising: a first motor side main reduction pinion gear as an output gear of the first motor side biaxial, and a first motor side main reduction bull gear as an input gear of the first half shaft,

The main speed reduction pinion on one side of the first motor is rigidly connected with the two shafts on one side of the first motor, and the main speed reduction pinion on one side of the first motor is meshed with the main speed reduction bull gear on one side of the first motor;

further comprises: a main reduction pinion gear on the side of the second motor, and a main reduction bull gear on the side of the second motor, wherein the main reduction pinion gear on the side of the second motor is used as an output gear of a two-shaft on the side of the second motor, the main reduction bull gear on the side of the second motor is used as an input gear of the second half shaft,

the main speed reducing pinion on one side of the second motor is rigidly connected with the two shafts on one side of the second motor, and the main speed reducing pinion on one side of the second motor is meshed with the main speed reducing bull gear on one side of the second motor.

5. The two-motor distributed electric drive axle of claim 4, wherein a first side reduction planetary row assembly is disposed on the first half shaft on one side of the first motor, a second side reduction planetary row assembly is disposed on the second half shaft on one side of the second motor,

the first side decelerating planet row assembly and the second side decelerating planet row assembly are respectively arranged on the axle shaft line.

6. The dual-motor distributed electric drive axle of claim 5, wherein the first side reduction planetary row assembly comprises a first side sun gear, a first side planet gear, a first side ring gear, and a first side planet gear frame, the first side ring gear is rigidly affixed to the electric drive axle housing, the first side sun gear receives power from the first half shaft to generate rotational motion, the first side planet gears are uniformly arranged about the axle axis, and are capable of revolving about the first side sun gear and rotating relative to the first side planet gear frame;

the second side speed reduction planetary gear assembly comprises a second side sun gear, a second side planetary gear, a second side annular gear and a second side planetary gear frame, wherein the second side annular gear is rigidly and fixedly connected with the electric drive axle housing, the second side sun gear receives power from the second half axle to generate rotary motion, and the second side planetary gear is uniformly arranged around the axle axis and can revolve around the second side sun gear and rotate relative to the second side planetary gear frame.

7. The dual-motor distributed electric drive axle of claim 6 wherein said first side sun gear is rigidly connected to said first motor side main reduction gear wheel and said first side planet wheel frame is connected to said first half shaft;

The second side sun gear is rigidly connected with the main reduction gear wheel on one side of the second motor, and the second side planet wheel frame is connected with the second half shaft.

8. The dual-motor distributed electric drive bridge of claim 2,

the gear shifting combination sleeve at the first side and the gear shifting gear hub at the first side are arranged on the two shafts at one side of the first motor, and the gear shifting combination sleeve at the second side and the gear shifting gear hub at the second side are arranged on the two shafts at one side of the second motor;

the gear shifting combination of the first side can reciprocally slide to a first position, a second position and a first N position between the first position and the second position on the gear shifting gear hub of the first side under the action and control of an external actuating mechanism of the gear shifting combination sleeve;

when the gear shifting combination sleeve on the first side is at a first position, one side of the first motor is in a first gear working state, when the gear shifting combination sleeve on the first side is at a second position, one side of the first motor is in a second gear working state, and when the gear shifting combination sleeve on the first side is at a first N position, one side of the first motor is in a neutral gear working state for disengaging power output;

the gear shifting combination sleeve at the second side can reciprocally slide to a third position, a fourth position and a second N position on the gear shifting gear hub at the second side under the action and control of an actuating mechanism at the outer part of the gear shifting combination sleeve;

When the gear-shifting combination sleeve of the second side is at the third position, one side of the second motor is in a first gear working state, when the gear-shifting combination sleeve of the second side is at the fourth position, one side of the second motor is in a second gear working state, and when the gear-shifting combination sleeve of the second side is at the second N position, one side of the second motor is in a neutral gear working state for disengaging power output.

9. The dual-motor distributed electric drive bridge of claim 8,

when the double-motor distributed electric drive bridge works in a first gear, one side of the first motor and one side of the second motor are both in a first gear working state, and the gear ratios of the first motor and the second motor are the same;

when the double-motor distributed electric drive bridge works in a second gear, one side of the first motor and one side of the second motor are both in a second gear working state, and the gear ratios of the second gears on one side of the first motor and one side of the second motor are the same;

when the double-motor distributed electric drive bridge is in neutral gear, one side of the first motor and one side of the second motor are both in a neutral gear working state, and power on one side of the first motor and power on one side of the second motor are not output;

When the double-motor distributed electric drive bridge is shifted from first gear to second gear or from second gear to first gear, a mode of short-time alternate gear shifting of the left motor and the right motor is adopted to realize the gear shifting of the whole electric drive bridge without power interruption,

when the double-motor distributed electric drive bridge shifts from a first gear to a second gear, a motor running on one side of the wheel and a gear shaft system matched with the motor on the side are driven to shift, so that the torque of the motor on the side is actively reduced to a smaller value or zero, a gear shifting mechanism on the side starts to move a gear shifting joint sleeve to disengage from a first gear position, then the motor on the side is subjected to speed regulation until a proper rotating speed value is reached, and the gear shifting joint sleeve on the side is further pushed to a second gear position, so that gear shifting is completed; at the moment, a motor for driving the wheels on the other side and a gear shaft system matched with the motor on the other side do not shift, and bear part or all of the whole-axle torque output requirement, after the first side is shifted, the second side motor and the gear shaft system matched with the second side motor start to carry out shifting operation, when the second side motor shifts, the torque is reduced to zero or a smaller value, then a shifting mechanism on the side starts to move a shifting joint sleeve, a first gear position is disengaged, then the second side motor is subjected to speed regulation until a proper rotating speed value is reached, and the side shifting joint sleeve is further pushed to a second gear position, so that shifting is completed;

When the two-motor distributed electric drive bridge is shifted to a first gear, a motor running on one side of the wheel and a gear shaft system matched with the motor on the side are driven to shift, so that the torque of the motor on the side is actively reduced to a smaller value or zero, a shifting mechanism on the side starts to move a shifting joint sleeve to disengage from a second gear position, then the motor on the side is subjected to speed regulation until a proper rotating speed value is reached, and the shifting joint sleeve on the side is further pushed to a first gear position, so that the shifting is completed; at the moment, a motor for driving the wheels on the other side and a gear shaft system matched with the motor on the other side do not shift, and bear part or all of the whole-axle torque output requirement, after the first side is shifted, the second side motor and the gear shaft system matched with the second side motor start to carry out shifting operation, when the second side motor shifts, the torque is reduced to zero or a smaller value, then a shifting mechanism on the side starts to move a shifting joint sleeve, a second gear position is disengaged, then the second side motor is subjected to speed regulation until a proper rotating speed value is reached, and the side shifting joint sleeve is further pushed to a first gear position, so that shifting is completed;

when the double-motor distributed electric drive bridge drives the vehicle to steer, the torque and the rotation speed of the wheels at the two sides during steering are reasonably distributed through the adjustment of the torque and the rotation speed of the first motor and the second motor, so that the torque and the rotation speed of the wheels at the outer side during steering are properly increased, and the torque and the rotation speed of the wheels at the inner side are properly reduced;

When one side motor of the double-motor distributed electric drive bridge fails, the other side motor and a gear shafting matched with the side motor can still drive the whole vehicle to run at half power.

10. A vehicle comprising a two-motor distributed electrically driven bridge as claimed in any one of claims 1 to 9.