CN219883666U - Dual-motor drive-reducing assembly and heavy electric tractor - Google Patents

Abstract

The utility model provides a double-motor drive-reducing assembly and a heavy electric tractor, which relate to the field of electric tractors and adopt the following scheme: including the bi-motor subtracts drives the assembly, the bi-motor subtracts drives the assembly and includes motor one and motor two, motor one with motor two all sets up in the motor cabinet, the both ends of motor cabinet are provided with the connecting seat, the connecting seat is L type, the connecting seat includes connecting portion and damping portion, connecting portion and frame connection, damping portion with be provided with damping subassembly between the motor cabinet, damping subassembly is vertical to be set up, the motor cabinet is located the frame below. The utility model can effectively damp the vibration of the double motors and greatly reduce the influence of vibration generated by road jolting and the like on the motors.

Description

Dual-motor drive-reducing assembly and heavy electric tractor

Technical Field

The utility model relates to the field of electric tractors, in particular to a double-motor drive-reducing assembly and a heavy-duty electric tractor.

Background

The electric tractor has the advantages of high energy conversion efficiency, low noise, no exhaust emission, convenient control and the like. The requirements of various logistics transportation delivery systems are met, the production operation efficiency can be remarkably improved, the electric tractor generally adopts a single motor system, and when the electric tractor is designed, the power of the motor is often larger because the electric tractor needs to cope with climbing and some complex road conditions, the high-efficiency interval of the motor is much larger than that of an internal combustion engine, but the rotating speed and torque requirements of the electric tractor are wider: the high acceleration performance and the climbing capability need large torque, the speed is from 0 to 100km/h, the rotating speed range is very high, although the efficiency of the motor can be very high under most medium and high speed working conditions, the efficiency of the motor can be reduced by 20% -30% than a high-efficiency interval under the conditions of low speed heavy load, low speed light load, high speed light load and the like, and in the actual application process, the motor is at a low-speed operation point under many conditions, so the efficiency of the motor is relatively low, and most of energy is wasted.

In order to solve the technical problem, in the prior art, through setting up the double motor and subtracting and drive the assembly, the double motor then can be through the collocation of difference, let the high efficiency interval of system enlarge greatly, promote the efficiency under the circumstances such as high-speed light load, two motors possess more high recovery efficiency intervals, can improve the efficiency of braking energy recovery, simultaneously, through breaking down single motor into two motors, can let the manufacturing degree of difficulty of motor reduce, the total weight also can reduce, for example, a double motor system that 40kW is about and a motor machine is constituteed about 30kW just can provide the performance of even surpassing a 100kW motor, total weight generally can reduce 30% or more simultaneously.

The advantages of the double-motor drive-reducing assembly all lead the double-motor drive-reducing assembly to have wide development prospect, but in use, in order to reduce energy waste, motors in the double-motor drive-reducing assembly are directly arranged on a vehicle drive axle, and the motor is easy to break down due to vibration although the transmission structure is simple and the transmission efficiency is high.

Disclosure of Invention

In order to solve the problem that the motor vibration in the double-motor drive-reducing assembly in the prior art is large, the utility model provides the double-motor drive-reducing assembly and the heavy electric tractor, which can effectively reduce vibration of the double motors and greatly reduce the influence of vibration generated by road jolting and the like on the motors.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a bi-motor subtracts drives assembly, includes motor one and motor two, motor one with motor two all sets up in the motor cabinet, the both ends of motor cabinet are provided with the connecting seat, the connecting seat is the L type, the connecting seat includes connecting portion and damping portion, connecting portion are used for being connected with the frame, damping portion with be provided with damping subassembly between the motor cabinet, damping subassembly is vertical to be set up, the motor cabinet is located the frame below. Through arranging motor one and motor two in the form of suspension below the frame and through the damping subassembly vibration, can greatly reduce the vibration that the vehicle caused of traveling, the vibration that the very big reduction bi-motor received.

Further, be provided with the mount pad on the motor cabinet, the damping subassembly includes damping piece and lower damping piece, go up damping piece with damping piece structure is the same and the cross section is protruding style of calligraphy structure down, damping portion is provided with spacing bench, be provided with spacing hole on the spacing bench, spacing hole runs through damping portion, go up damping piece tip with damping piece tip sets up respectively spacing hole both ends down, go up damping piece with run through in the middle of the damping piece down there is the connecting axle, the connecting axle upper end stretches out the mount pad is provided with the nut, the lower extreme of connecting axle stretches out damping piece down and be provided with cushion and spacing head. The penetration depth of the upper vibration reduction block and the lower vibration reduction block is increased through the limiting table, so that the vibration reduction effect of the vibration reduction assembly on the horizontal direction of the double motors is increased.

The utility model also provides a heavy electric traction car, including the frame, still include foretell bi-motor and subtract and drive the assembly, connecting portion with the frame is connected, reduction gears with the frame is connected, the frame adopts air suspension. The vibration to the dual motor that the roof beam caused because of the road surface jolts can be further buffered through adopting the air suspension.

Further, the first motor and the second motor are respectively provided with a driving gear, the driving gears are meshed with an intermediate gear, the intermediate gear is connected with an input shaft of a speed reducing mechanism, and the speed reducing mechanism is positioned at the rear part of the motor base along the running direction. The system efficiency can be improved through the form of driving the speed reducer in parallel by the double motors.

Further, the motor cooling device further comprises a radiator, cooling liquid is arranged in the radiator, the radiator is communicated with a water pump, the water pump is communicated with a cooling pipeline, the cooling pipeline comprises a first branch and a second branch, the first branch and the second branch respectively extend into the motor I and the motor II, and liquid return ends of the first branch and the second branch are communicated with the radiator. The first motor and the second motor can be cooled respectively through the first branch and the second branch, and the same cooling effect on the first motor and the second motor is ensured.

Further, the vehicle frame comprises a battery replacing module, wherein the battery replacing module is fixed above the vehicle frame through a battery replacing bottom bracket, and the battery replacing module comprises a power battery, a battery cooling system and a battery controller. The battery and accessories thereof are integrated by using the battery replacing module, so that the battery is convenient to charge, replace and maintain.

Further, the automatic lifting device for the electric vehicle further comprises a cab electric lifting device, the cab electric lifting device comprises an electric lifting oil pump and a hydraulic lifting oil cylinder, an auxiliary control button is arranged on the electric lifting oil pump, the electric lifting oil pump is further electrically connected with a main control switch, the main control switch is arranged in the cab, and the hydraulic lifting oil cylinder adopts a self-locking oil cylinder. The safety of the cab during overturning can be improved through the combination of the main control switch and the auxiliary control button, and potential safety hazards caused by false triggering due to control of a single position are avoided.

Further, the cab is a single-side cab.

Further, still include electric power steering system, electric air brake system and electric air conditioner, electric power steering system includes electric oil pump, electric air brake system includes electric inflation pump, electric air conditioner includes the compressor, electric oil pump electric inflation pump with the compressor all is connected with the controller electricity, the controller sets up the frame is inboard, the controller includes the control battery, electric oil pump electric inflation pump with the compressor all with trade electric battery module electricity and be connected.

Further, the frame adopts the variable cross-section structure, frame front portion width is greater than frame rear portion width, the frame includes left longeron and right longeron, left longeron with be provided with the stiffening beam between the right longeron, the rear axle with the frame passes through leaf spring and connects. Through the frame that adopts variable cross-section structure, can guarantee the installation of various systems, alleviateed the frame weight simultaneously, realize the lightweight.

From the above technical scheme, the utility model has the following advantages:

the scheme provides a double-motor drive reduction assembly and a heavy electric tractor, and the influence of vibration caused by vehicle running on the double motors can be greatly reduced by arranging the motor I and the motor II below a frame in a suspension mode and damping the vibration through a damping assembly; the penetration depth of the upper vibration reduction block and the lower vibration reduction block is increased through the limiting table, so that the vibration reduction effect of the vibration reduction assembly on the horizontal direction of the double motors is further increased; the vibration of the double motors caused by the bumping of the vehicle beam on the road surface can be further buffered by adopting the air suspension; the system efficiency can be improved by the mode of driving the speed reducer in parallel through the double motors; the first motor and the second motor can be cooled respectively through the first branch and the second branch, so that the first motor and the second motor are guaranteed to have the same cooling effect; the battery and accessories thereof are integrated by using the battery replacing module, so that the battery is convenient to charge, replace and maintain; the safety of the cab during overturning can be improved through the combination of the main control switch and the auxiliary control button, and potential safety hazards caused by false triggering due to control of a single position are avoided; through the frame that adopts variable cross-section structure, can guarantee the installation of various systems, alleviateed the frame weight simultaneously, realize the lightweight.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a first embodiment of the present utility model.

Fig. 2 is a transmission schematic diagram of a first embodiment of the present utility model.

Fig. 3 is a schematic view illustrating an assembly structure of a connection base, a vibration damping assembly and a mounting base according to a first embodiment of the present utility model.

Fig. 4 is a schematic structural diagram of a connector according to a first embodiment of the present utility model.

Fig. 5 is a schematic structural diagram of a motor base according to a first embodiment of the present utility model.

FIG. 6 is a schematic diagram of a second embodiment of the present utility model

Fig. 7 is a schematic diagram of a second embodiment of the present utility model.

In the figure, 1, a cab, 2, a battery replacing module, 3, a battery replacing base, 5, a frame, 6, a mounting bracket, 8, an electric lifting oil pump, 9, a double-motor drive reduction assembly, 901, a motor I, 902, a motor II, 903, a driving gear, 904, an intermediate gear, 905, a reduction mechanism, 906, a motor seat, 9061, a flanging, 9062, a mounting seat, 907, a connecting seat, 9071, a connecting part, 9072, a vibration reduction part, 9073, a limiting table, 908, a bracket, 909, a connecting shaft, 910, an upper nut, 911, a gasket, 912, an upper vibration reduction block, 913, a lower vibration reduction block, 914, a cushion block, 10, a control battery, 11, an electric inflating pump, 12, a transmission shaft, 13, a rear axle, 14, a steel plate spring, 15, an electric steering system, 17, a controller, 18, an electric pneumatic braking system, 19 and a radiator.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.

The inventor finds that in the existing heavy electric traction vehicle, as two motors are arranged on a vehicle drive axle in parallel, the vibration intensity on the drive axle is high, and the motors are extremely easy to break down due to vibration; based on the above, in an embodiment of the present utility model provided by the inventor, two motors are mounted under the frame in a suspension manner, and vibration reduction is matched, so that the technical problem that the motors fail due to vibration in the prior art is solved.

Detailed description of the preferred embodiments

As shown in fig. 1 to 3, the present embodiment provides a dual-motor reduction assembly, which includes a first motor 901, a second motor 902, and a reduction mechanism 905; the first motor 901 and the second motor 902 are arranged in parallel, the first motor 901 and the second motor 902 are both provided with a driving gear 903, the driving gears 903 are meshed with an intermediate gear 904, the intermediate gear 904 is connected with an input shaft of a speed reduction mechanism 905, the speed reduction mechanism 905 adopts a planetary gear reducer, the speed reduction mechanism 905 is positioned at the rear part of a motor seat 906 along the running direction, and the speed reducer is connected with a rear axle 13 through a transmission shaft 12; the motor I901 and the motor II 902 are both arranged in a motor seat 906, connecting seats 907 are arranged at two ends of the motor seat 906, the connecting seats 907 are L-shaped, each connecting seat 907 comprises a connecting portion 9071 and a vibration reduction portion 9072, the connecting portions 9071 are used for being connected with a frame 5 in a riveting mode, a vibration reduction assembly is arranged between each vibration reduction portion 9072 and the corresponding motor seat 906, the vibration reduction assembly is vertically arranged, the motor seat 906 is located below the frame 5, a speed reduction mechanism 905 is connected with the frame 5 in a riveting mode through a support 908, and a vibration reduction assembly is also arranged at the joint of the support 908 and the speed reducer; through arranging motor one 901 and motor two 902 in the form of suspension below frame 5 and connect through the damping subassembly, can greatly reduce the vibration that the vehicle went to cause, the vibration that greatly reduces the bi-motor received, increase of service life.

As shown in fig. 3 to 5, in order to further improve the vibration damping capability of the vibration damping assembly, the vibration damping assembly can also play a role in damping vibration along a horizontal plane, flanges 9061 are arranged on two sides of a motor base 906, mounting bases 9062 are arranged on the flanges 9061, the mounting bases 9062 are in an L shape, reinforcing plates are arranged on two sides of the mounting bases, the vibration damping assembly comprises an upper vibration damping block 912 and a lower vibration damping block 913, the vibration damping block and the lower vibration damping block 913 are identical in structure and have a convex-shaped structure in cross section, a limiting table 9073 is arranged on the vibration damping portion 9072 in a welding mode, limiting holes are formed in the limiting table 9073, the limiting holes penetrate through the vibration damping portion 9072, small ends of the upper vibration damping block 912 and small ends of the lower vibration damping block 913 are respectively arranged at two ends of the limiting holes, a connecting shaft 909 penetrates through the middle of the upper vibration damping block 912 and the lower vibration damping block 913, the upper end of the connecting shaft is extended out of the mounting bases 9062 and is provided with an upper nut 910 and a gasket 911, the lower end of the connecting shaft 909 is extended out of the lower cushion block 914 and is sequentially provided with a 913 and a limiting head, penetration depth of the upper vibration damping block 912 and the lower vibration damping block 913 is increased through the limiting table 9073, and the limiting table 913 is further, and the vibration damping assembly has a double horizontal effect on the vibration damping assembly is further increased.

Detailed description of the preferred embodiments

As shown in fig. 6 and 7, the present embodiment provides a heavy electric tractor, which includes the above dual-motor drive-reducing assembly, and in order to further reduce vibration of the dual motors, and also to improve riding comfort, the frame 5 adopts an air suspension; the vibration to the dual motor that the roof beam caused because of the road surface jolts can be further buffered through adopting the air suspension.

In order to realize the heat dissipation of the first motor 901 and the second motor 902, the tractor further comprises a radiator 19, a cooling liquid is arranged in the radiator 19, the radiator 19 is communicated with a water pump, the water pump is communicated with a cooling pipeline, the cooling pipeline comprises a first branch and a second branch which are connected in parallel, the first branch and the second branch extend into the first motor 901 and the second motor 902 respectively, liquid return ends of the first branch and the second branch are communicated with the radiator 19, and a fan is arranged on the radiator 19; the cooling heat enters the corresponding motor through the branch I and the branch II to exchange heat under the action of the water pump, absorbs the heat generated by the motor, and then flows back to the radiator 19 to cool; the first motor 901 and the second motor 902 can be cooled respectively through the first branch and the second branch, so that the first motor 901 and the second motor 902 are guaranteed to have the same cooling effect.

As shown in fig. 6 and 7, in order to facilitate charging, battery replacement and maintenance, the tractor further comprises a battery replacement module 2, wherein the battery replacement module 2 is fixed above the frame 5 through a battery replacement bracket 3, and the battery replacement module 2 comprises a power battery, a battery cooling system and a battery controller 17. The battery and accessories thereof are integrated by using the battery replacing module 2, the battery and accessories are directly assembled on the battery replacing base 3, the battery and accessories are replaced together during the battery replacement, the battery replacing operation is simple, and meanwhile, the battery replacing module 2 is provided with a charging port, so that the battery can be directly charged.

As shown in fig. 6, in order to replace the safety of the self-tractor when the cab 1 turns over, the self-tractor further comprises a cab electric lifting device, wherein the cab electric lifting device comprises an electric lifting oil pump 8 and a hydraulic lifting oil cylinder, an auxiliary control button is arranged on the electric lifting oil pump 8, the electric lifting oil pump 8 is further electrically connected with a main control switch, the main control switch is arranged in the cab 1, the hydraulic lifting oil cylinder adopts a self-locking oil cylinder, and accidents caused by leakage or misoperation of the oil cylinder are prevented; when the intelligent control device is used, a driver turns on the main control switch and then starts the auxiliary control button, so that the cab 1 can be turned over, the safety of the cab 1 during turning over can be improved through the combination of the main control switch and the auxiliary control button, and potential safety hazards caused by false triggering due to control of a single position are avoided.

As shown in fig. 6 and 7, to raise the present tractor automation level, an electric power steering system 15, an electric pneumatic brake system 18 and an electric air conditioner are further included; the electric steering system 15 comprises an electric oil pump, a hydraulic power steering gear and a mechanical steering device, the electric oil pump 8 can transmit high pressure to the hydraulic power steering gear to work, the electric pneumatic brake system 18 comprises an electric inflating pump 11, an air filter and a brake system, the electric inflating pump 11 can start to work after a power supply is started, the power supply is cut off after a preset pressure is reached, the electric inflating pump 11 stops working, and when the pressure of the brake system is lower than the preset pressure, the electric inflating pump 11 is switched on again to start working; the electric air conditioner comprises a compressor, a condenser and a blower; the electric oil pump, the electric inflating pump 11 and the compressor are electrically connected with a controller 17, the controller 17 is arranged on the inner side of the frame 5 through a mounting bracket 6, the controller 17 comprises a control battery 10, and the electric oil pump, the electric inflating pump 11 and the compressor are electrically connected with a battery replacing module 2; the voltage of the battery 10 is controlled to be 24V battery box, corresponding electric signals are sent to each electric executing component through the 24V low-voltage battery box, and each electric executing component executes actions under the power supply of the battery replacing module 2.

As shown in fig. 6 and 7, the cab 1 is a single-sided cab, one side of the cab 1 is a driver operation area, the other side is a workbench, and a commander can command a driver in a vehicle and a staff outside the vehicle at the workbench position, so that the safety and reliability of driving operation of the vehicle are improved.

The frame 5 adopts the variable cross-section structure, and frame 5 front portion width is greater than frame 5 rear portion width, and frame 5 includes parallel arrangement's left longeron and right longeron, and the welding is provided with the stiffening beam between left longeron and the right longeron, and rear axle 13 passes through leaf spring 14 with frame 5 to be connected. By adopting the frame 5 of a variable cross-section structure, the installation of various systems and components can be ensured, and simultaneously, the weight of the frame 5 is lightened, thereby realizing the weight reduction.

From the above detailed description, it can be seen that the present utility model has the following advantages:

1. the first motor 901 and the second motor 902 are arranged below the frame 5 in a suspension mode and are connected through the vibration reduction assembly, so that the influence of vibration caused by vehicle running on the double motors can be greatly reduced;

2. the penetration depth of the upper vibration reduction block 912 and the lower vibration reduction block 913 is increased through the limit platform 9073, so that the vibration reduction effect of the vibration reduction assembly on the horizontal direction of the double motors is increased;

3. the vibration of the double motors caused by the bumping of the vehicle beam on the road surface can be further buffered by adopting the air suspension;

4. the system efficiency can be improved by the mode of driving the speed reducer in parallel through the double motors; the first motor 901 and the second motor 902 can be cooled respectively through the first branch and the second branch, so that the first motor 901 and the second motor 902 are guaranteed to have the same cooling effect;

5. the battery and accessories thereof are integrated by using the battery replacing module, so that the battery is convenient to charge, replace and maintain; the safety of the cab 1 during overturning can be improved through the combination of the main control switch and the auxiliary control button, and potential safety hazards caused by false triggering due to control of a single position are avoided;

6. by adopting the frame 5 with a variable cross-section structure, the installation of various systems can be ensured, and meanwhile, the weight of the frame 5 is lightened, so that the weight is reduced.

The terms "upper," "lower," "outboard," "inboard," and the like in the description and in the claims of the utility model and in the above figures, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a bi-motor subtracts drives assembly, includes motor one (901) and motor two (902), its characterized in that, motor one (901) and motor two (902) all set up in motor cabinet (906), the both ends of motor cabinet (906) are provided with connecting seat (907), connecting seat (907) are the L type, connecting seat (907) include connecting portion (9071) and damping portion (9072), connecting portion (9071) are used for being connected with the frame, be provided with damping subassembly between damping portion (9072) and motor cabinet (906), damping subassembly is vertical to be set up, motor cabinet (906) are located the frame below.

2. The dual-motor drive reduction assembly according to claim 1, wherein the motor base (906) is provided with a mounting seat (9062), the vibration reduction assembly comprises an upper vibration reduction block (912) and a lower vibration reduction block (913), the upper vibration reduction block (912) and the lower vibration reduction block (913) are identical in structure and have convex cross sections, the vibration reduction part (9072) is provided with a limiting table (9073), the limiting table (9073) is provided with a limiting hole, the limiting hole penetrates through the vibration reduction part (9072), the small end of the upper vibration reduction block (912) and the small end of the lower vibration reduction block (913) are respectively arranged at two ends of the limiting hole, a connecting shaft (909) penetrates through the middle of the upper vibration reduction block (912) and the lower vibration reduction block (913), the upper end of the connecting shaft (909) stretches out of the mounting seat (9062) and is provided with an upper nut (910), and the lower end of the connecting shaft (909) stretches out of the lower vibration reduction block (914) and is provided with a cushion block (914) and a limiting head.

3. A heavy electric traction vehicle, comprising a vehicle frame (5), characterized in that it further comprises a dual-motor reduction assembly (9) according to claim 2, the connecting part (9071) is connected with the vehicle frame (5), the reduction mechanism (905) is connected with the vehicle frame (5), and the vehicle frame (5) adopts an air suspension.

4. A heavy electric traction vehicle according to claim 3, characterized in that the first motor (901) and the second motor (902) are provided with drive gears (903), the drive gears (903) are meshed with intermediate gears (904), the intermediate gears (904) are connected with an input shaft of a speed reduction mechanism (905), and the speed reduction mechanism (905) is positioned at the rear part of the motor seat (906) along the running direction.

5. A heavy electric traction vehicle as claimed in claim 3, further comprising a radiator (19), wherein a cooling liquid is arranged in the radiator (19), the radiator (19) is communicated with a water pump, the water pump is communicated with a cooling pipeline, the cooling pipeline comprises a first branch and a second branch, the first branch and the second branch extend into the motor (901) and the motor (902) respectively, and liquid return ends of the first branch and the second branch are communicated with the heat equalizing radiator (19).

6. A heavy electric traction vehicle as claimed in claim 3, characterized in that it further comprises a battery-change module (2), the battery-change module (2) being fixed above the frame (5) by means of a battery-change shoe (3), the battery-change module (2) comprising a power battery, a battery cooling system and a battery controller (17).

7. A heavy electric traction vehicle as claimed in claim 3, further comprising a cab electric lifting device comprising an electric lifting oil pump (8) and a hydraulic lifting oil cylinder, the electric lifting oil pump (8) being provided with an auxiliary control button, the electric lifting oil pump (8) being further electrically connected with a main control switch, the main control switch being arranged in the cab, the hydraulic lifting oil cylinder being a self-locking oil cylinder.

8. Heavy electric traction vehicle according to claim 7, characterized in that the cab (1) is a single-sided cab.

9. The heavy electric traction vehicle of claim 8, further comprising an electric steering system (15), an electric air brake system (18) and an electric air conditioner, wherein the electric steering system (15) comprises an electric oil pump, the electric air brake system (18) comprises an electric air pump (11), the electric air conditioner comprises a compressor, the electric oil pump, the electric air pump (11) and the compressor are all electrically connected with a controller (17), the controller (17) is arranged on the inner side of the vehicle frame (5), the controller (17) comprises a control battery (10), and the electric oil pump, the electric air pump (11) and the compressor are all electrically connected with the battery replacement module (2).

10. A heavy electric traction vehicle according to claim 3, characterized in that the frame (5) is of variable cross-section construction, the front width of the frame (5) is greater than the rear width of the frame (5), the frame (5) comprises a left longitudinal beam and a right longitudinal beam, a stiffening beam is arranged between the left longitudinal beam and the right longitudinal beam, and the rear axle (13) is connected with the frame (5) through a leaf spring (14).