New energy heavy truck and tubular electric drive chassis thereof

Abstract

The invention relates to a new energy heavy truck and a tubular electric drive chassis thereof, the truck comprises the tubular electric drive chassis, and a cargo compartment, a cab and a power battery which are arranged on the tubular electric drive chassis, the chassis comprises two steering front axles; differential mechanisms are arranged in the two driving rear axles respectively, the two driving rear axles are connected through tubular frames respectively, planetary gears corresponding to the differential mechanisms are arranged in the tubular frames respectively, and the planetary gears are connected with the corresponding differential mechanisms respectively; the plurality of driving motors are respectively arranged between the two steering front axles, between the two driving rear axles and between one steering front axle and the driving rear axle; each driving motor is connected with the corresponding differential mechanism or the corresponding planetary gear. The plurality of wheels are respectively connected with the corresponding steering front axle and the driving rear axle; the two steering front axles and the two driving rear axles are connected into a whole through the vehicle beam; the tubular electric drive chassis is switched among an all-wheel drive mode, a front wheel drive mode, a rear wheel drive mode or an enhanced all-wheel drive mode.

Description

Technical Field

[0001] This invention relates to new energy vehicles, and in particular to a new energy heavy-duty truck and its tubular electric drive chassis. Background Art

[0002] Currently, the mainstream drive system used in new energy heavy-duty trucks is a central drive chassis. Pure electric trucks often use a single or dual drive axle with a steering axle. The electric drive axle assembly consists of a bridge body, a transmission mechanism, and a drive motor. A single-axle electric drive axle consists of a single electric drive axle assembly. Because some heavy-duty truck models require dual-axle drive, an existing single-axle electric drive axle is supplemented with an additional electric drive axle assembly and a steering axle to complete the chassis, creating a dual-axle chassis with two axles. While this configuration is simple to implement, it can easily bog down in complex terrain. For example, oil exploration areas place high demands on vehicles transporting oil exploration equipment, particularly in terms of power and off-road capability. Existing single or dual drive axles cannot meet these requirements. Furthermore, the bridge body, transmission mechanism, and drive motor are often integrated into a single structure, resulting in heavy unsprung mass and insufficient handling for demanding operating conditions and driving comfort. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies of the prior art by providing a new energy heavy-duty truck and its tubular electric drive chassis, which can achieve zero emissions and meet the requirements of all-terrain driving.

[0004] To achieve the above objectives, the present invention provides a tubular electric drive chassis, comprising:

[0005] Two steering front axles;

[0006] The vehicle has two drive rear axles, two steering front axles and two drive rear axles, each with a built-in differential and connected by a tubular frame. The tubular frame has a built-in planetary gear for each differential, and the planetary gear is connected to the corresponding differential.

[0007] Multiple drive motors are respectively disposed between the two steering front axles, between the two drive rear axles, and between one steering front axle and one drive rear axle; each drive motor is respectively connected to the corresponding differential or planetary gear.

[0008] A plurality of wheels, respectively connected to the corresponding steering front axle and driving rear axle; and

[0009] A vehicle beam, connecting the two steering front axles and the two driving rear axles into one body;

[0010] Among them, according to different road conditions and driving requirements, the tubular electric drive chassis switches between all-wheel drive mode, front-wheel drive mode, rear-wheel drive mode or enhanced all-wheel drive mode.

[0011] The aforementioned tubular electric drive chassis includes a plurality of drive motors comprising a first drive motor, a second drive motor, and a third drive motor. The first drive motor is disposed between the two steering front axles, the second drive motor is disposed between the two drive rear axles, and the third drive motor is disposed between one of the steering front axles and the drive rear axle. The front and rear output shafts of the third drive motor are respectively connected to the corresponding differentials via corresponding planetary gears. The front output shaft of the first drive motor is connected to the corresponding planetary gear, and the rear output shaft of the first drive motor is connected to the corresponding differential. The front output shaft of the second drive motor is connected to the corresponding differential, and the rear output shaft of the second drive motor is connected to the corresponding planetary gear.

[0012] In the above-mentioned tubular electric drive chassis, the multiple wheels are respectively connected to the corresponding steering front axle and driving rear axle through swing half-axles.

[0013] In the aforementioned tubular electric drive chassis, in the front-wheel drive mode, the first drive motor operates, and the rear steering front axle of the two steering front axles is driven; in the rear-wheel drive mode, the second drive motor operates, and the front driving rear axle of the two driving rear axles is driven, so as to achieve energy-saving and high-speed transportation when the road conditions are good or the load is light.

[0014] In the aforementioned tubular electric drive chassis, during all-wheel drive mode, the first drive motor outputs power to the corresponding planetary gear and transmits the power to the corresponding differential, driving the front steering axle of the two steering front axles; the rear steering front axle of the two steering front axles is directly driven by the first drive motor and the corresponding differential; the second drive motor outputs power to the corresponding planetary gear and transmits the power to the corresponding differential, driving the rear drive rear axle of the two drive rear axles; the front drive rear axle of the two drive rear axles is directly driven by the second drive motor and the corresponding differential.

[0015] In the aforementioned tubular electric drive chassis, during the enhanced all-wheel drive mode, the third drive motor drives the rear steering front axle of the two steering front axles and the front drive rear axle of the two drive rear axles through corresponding planetary gear coupling to participate in the overall vehicle drive.

[0016] The above-mentioned tubular electric drive chassis, wherein the multiple drive motors are all inner rotor motors, each of the drive motors respectively includes a motor housing, a motor stator, a motor rotor, a front output shaft and a rear output shaft, the motor stator is arranged in the motor housing, the motor rotor is arranged corresponding to the motor stator, and the front output shaft and the rear output shaft are respectively connected to the motor rotor.

[0017] In the aforementioned tubular electric drive chassis, all of the multiple drive motors adopt a water-cooled heat dissipation structure, and the motor stator is cooled by cooling water channels provided on the motor housing.

[0018] In the above-mentioned tubular electric drive chassis, a differential connection part, a planetary gear connection part and an air spring connection part are respectively provided on the vehicle beam corresponding to the two steering front axles and the two driving rear axles.

[0019] In order to better achieve the above objectives, the present invention also provides a new energy heavy-duty truck, which includes a chassis and a cargo compartment, a cab and a power battery installed on the chassis, and the chassis is the above-mentioned tubular electric drive chassis.

[0020] The technical effects of the present invention are:

[0021] The present invention can realize all-wheel drive, with the first drive motor driving the rear steering front axle and the second drive motor driving the front drive rear axle; when turning is required, power is transmitted to the wheels through the steering knuckle; the second drive motor drives the two drive rear axles to realize an all-wheel drive mode; when the road conditions are more complicated, in addition to the operation of the first and second drive motors, the third drive motor is input through the sun gear of the planetary gear, coupled to drive the rear steering front axle and the front drive rear axle, participating in the drive of the entire vehicle, increasing the vehicle driving force, realizing an enhanced all-wheel drive mode to achieve the purpose of getting out of trouble; the front-wheel drive mode or the rear-wheel drive mode can be realized, when the first drive motor is working, the rear steering front axle is driven, and the other axles have no power output; or when the second drive motor is working, the front drive rear axle is driven, and the other axles have no power output, realizing high-speed transportation when the road conditions are good or the load is light, and achieving the purpose of energy saving.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a new energy heavy-duty truck according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a tubular electric drive chassis according to an embodiment of the present invention;

[0025] Figure 3 for Figure 2 A top view of

[0026] Figure 4 This is a schematic diagram of a tubular frame connection according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the connection relationship between the vehicle beam and the chassis according to an embodiment of the present invention.

[0028] Among them, the attached figures are labeled

[0029] 1-tube electric drive chassis

[0030] 11 Steering front axle

[0031] 12 drive rear axle

[0032] 13 drive motors

[0033] 131 motor stator

[0034] 132 motor rotor

[0035] 133 front output shaft

[0036] 134 rear output shaft

[0037] 135 cooling water circuit

[0038] 136 motor housing

[0039] 137 First Drive Motor

[0040] 138 Second Drive Motor

[0041] 139 third drive motor

[0042] 14 differential

[0043] 141 input shaft

[0044] 142 output shaft

[0045] 143 first differential

[0046] 144 Second Differential

[0047] 145 third differential

[0048] 146 Fourth Differential

[0049] 15 planetary gears

[0050] 151 input terminal

[0051] 152 output terminal

[0052] 153 First Planetary Gear

[0053] 154 second planetary gear

[0054] 155 Third Planetary Gear

[0055] 156 Fourth Planetary Gear

[0056] 16-tube frame

[0057] 17 Swing half shaft

[0058] 18 wheels

[0059] 19 car beam

[0060] 191 differential connection

[0061] 192 planetary gear connection

[0062] 193 air spring connection

[0063] 2 Power battery

[0064] 3 brackets

[0065] 4 cargo boxes

[0066] 5 driver's cab DETAILED DESCRIPTION

[0067] The structural principle and working principle of the present invention are described in detail below with reference to the accompanying drawings:

[0068] See also Figure 1 , Figure 1 The figure is a schematic diagram of the structure of a new energy heavy-duty truck according to one embodiment of the present invention. The new energy heavy-duty truck comprises a chassis, a cargo compartment 4 mounted on the chassis, a cab 5, and a power battery 2. The chassis is a tubular electric drive chassis 1. The power battery 2 is located between the cab 5 and the cargo compartment 4 and is connected to the drive motor 13. The cargo compartment 4 is fixedly connected to the vehicle beam 19 via a bracket 3. The composition, structure, relative positional relationships, connection relationships, and functions of the other components of this new energy heavy-duty truck are relatively mature existing technologies and are not described in detail here. The following describes only the tubular electric drive chassis 1 of the present invention in detail.

[0069] See also Figure 2 and Figure 3 , Figure 2 This is a schematic structural diagram of a tubular electric drive chassis 1 according to an embodiment of the present invention. Figure 3 for Figure 2The tubular electric drive chassis 1 of the present invention comprises: two steering front axles 11; two driven rear axles 12, each of the two steering front axles 11 and the two driven rear axles 12 having a built-in differential 14 and connected via a tubular frame 16, wherein the tubular frame 16 has a built-in planetary gear 15 corresponding to each differential 14, and the planetary gears 15 are connected to the corresponding differential 14; a plurality of drive motors 13, each of which is disposed between the two steering front axles 11, between the two driven rear axles 12, and between one of the steering front axles 11 and one of the driven rear axles 12; each of the drive motors 13 is connected to the corresponding differential 14 or the planetary gear 15; and a plurality of wheels. 18, which are respectively connected to the corresponding steering front axle 11 and driving rear axle 12 through a swing half-shaft 17; and a vehicle beam 19, which connects the two steering front axles 11 and the two driving rear axles 12 into one body, and the vehicle beam 19 is respectively provided with a differential connection part 191, a planetary gear connection part 192 and an air spring connection part 193 corresponding to the two steering front axles 11 and the two driving rear axles 12, and air springs are respectively provided on the vehicle beam 19 and between the two steering front axles 11 and the two driving rear axles 12; wherein, according to different road conditions and driving requirements, the tubular electric drive chassis 1 is switched among the all-wheel drive mode, the front-wheel drive mode, the rear-wheel drive mode or the enhanced all-wheel drive mode.

[0070] See also Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the connection of the tubular frame 16 according to an embodiment of the present invention. Figure 5 Schematic diagram of the connection between the beam 19 and the chassis according to one embodiment of the present invention. The multiple drive motors 13 in this embodiment include a first drive motor 137, a second drive motor 138, and a third drive motor 139. The first drive motor 137 is disposed between the two steering front axles 11, the second drive motor 138 is disposed between the two drive rear axles 12, and the third drive motor 139 is disposed between one of the steering front axles 11 and the drive rear axle 12. The front output shaft 133 and rear output shaft 134 of the third drive motor 139 are respectively connected to the corresponding differential 14 via corresponding planetary gears 15. The front output shaft 133 of the first drive motor 137 is connected to the corresponding planetary gear 15, and the rear output shaft 134 of the first drive motor 137 is connected to the corresponding differential 14. The front output shaft 133 of the second drive motor 138 is connected to the corresponding differential 14, and the rear output shaft 134 of the second drive motor 138 is connected to the corresponding planetary gear 15.

[0071] In this embodiment, all of the plurality of drive motors 13 are preferably internal rotor motors. Each drive motor 13 includes a motor housing 136, a motor stator 131, a motor rotor 132, a front output shaft 133, and a rear output shaft 134. The motor stator 131 is disposed within the motor housing 136, and the motor rotor 132 is disposed corresponding to the motor stator 131. The front output shaft 133 and the rear output shaft 134 are respectively connected to the motor rotor 132. All of the plurality of drive motors 13 adopt a water-cooled heat dissipation structure, and the motor stator 131 is cooled by cooling water through a cooling water channel 135 disposed on the motor housing 136.

[0072] Referring to the table below, in the front-wheel drive mode, the first drive motor 137 operates, and the rear steering front axle of the two steering front axles 11 is driven; in the rear-wheel drive mode, the second drive motor 138 operates, and the front driving rear axle of the two driving rear axles 12 is driven, so as to achieve energy-saving and high-speed transportation when the road conditions are good or the load is light.

[0073] In the all-wheel drive mode, the first drive motor 137 outputs power to the corresponding planetary gear 15 and transmits the power to the corresponding differential 14, driving the front steering axle of the two steering front axles 11; the rear steering front axle of the two steering front axles 11 is directly driven by the first drive motor 137 driving the corresponding differential 14; the second drive motor 138 outputs power to the corresponding planetary gear 15 and transmits the power to the corresponding differential 14, driving the rear drive rear axle of the two drive rear axles 12; the front drive rear axle of the two drive rear axles 12 is directly driven by the second drive motor 138 driving the corresponding differential 14.

[0074] In the enhanced all-wheel drive mode, the third drive motor 139 drives the rear steering front axle of the two steering front axles 11 and the front drive rear axle of the two drive rear axles 12 through the corresponding planetary gears 15 to participate in the vehicle drive.

[0075] Power component working status table

[0076]

[0077] like Figure 4As shown, in this embodiment, the differentials from front to back are a first differential 143, a second differential 144, a third differential 145, and a fourth differential 146, with the corresponding planetary gears 15 in the order of first planetary gear 153, second planetary gear 154, third planetary gear 155, and fourth planetary gear 156. The output shaft 142 of each differential 14 is connected to the shafts at both ends of the corresponding steering front axle 11 and drive rear axle 12. The input shaft 141 of the first differential 143 is connected to the output end 152 of the corresponding first planetary gear 153. The input end 151 of the first planetary gear 153 is connected to the front output shaft 133 of the first drive motor 137. The rear output shaft 134 of the first drive motor 137 is connected to the input shaft 141 of the second differential 144. The other input shaft 141 of the second differential 144 is connected to the output end 152 of the second planetary gear 154. The input end 151 of the second planetary gear 154 is connected to... The front output shaft 133 of the third drive motor 139 is connected, the rear output shaft 134 of the third drive motor 139 is connected to the input end 151 of the third planetary gear 155, the output end 152 of the third planetary gear 155 is connected to the input shaft 141 of the third differential 145, the other end input shaft 141 of the third differential 145 is connected to the front output shaft 133 of the second drive motor 138, and the rear output shaft 134 of the second drive motor 138 is connected to the input end 151 of the fourth planetary gear 156.

[0078] During operation, since the tubular frame 16 and the beam 19 are rigidly connected, the cab 5, power battery 2 and cargo box 4 are on the beam 19. In this embodiment, the wheel 18 is an all-wheel independent suspension, which can achieve free movement of the wheel 18 by swinging the half shaft 17 (the built-in differential 14 can achieve a certain angle of floating). However, the wheels of the existing 4-axle vehicle are torsion beam suspensions, which cannot move freely, which will reduce the vehicle's off-road performance and make it easy to get stuck. For transportation with high time requirements, the chassis of the existing technology also has certain risks.

[0079] This invention enables all-wheel drive. Power is output from the first drive motor 137 to the sun gear of the first planetary gear 153, then to the ring gear of the first planetary gear 153, which in turn transmits the power to the first differential 143, driving the front steering axle 11. The rear steering axle 11 is directly driven by the first drive motor 137 through the second differential 144, which then drives the rear steering axle 11. Power is also output from the second drive motor 138 to the sun gear of the fourth planetary gear 156, then to the ring gear of the fourth planetary gear 156, which in turn transmits the power to the fourth differential 146, driving the rear drive axle 12. The front drive axle 12 is directly driven by the second drive motor 138 through the third differential 145, which then drives the front drive axle 12.

[0080] When turning, power is transmitted to the wheels 18 through the steering knuckle. The second drive motor 138 drives the two drive rear axles 12 to achieve all-wheel drive. When the road conditions are more complicated, in addition to the first drive motor 137 and the second drive motor 138, the third drive motor 139 is coupled to drive the rear steering front axle 11 and the front drive rear axle 12 through the sun gear input of the second planetary gear 154 and the third planetary gear 155, participating in the vehicle's driving, increasing the vehicle's driving force and achieving the purpose of getting out of trouble.

[0081] It can also achieve front-wheel drive or rear-wheel drive. When the first drive motor 137 is working, the rear steering front axle 11 is driven and the other axles have no power output. Or when the second drive motor 138 is working, the front drive rear axle 12 is driven and the other axles have no power output, so as to achieve high-speed transportation when the road conditions are good or the load is light, and achieve the purpose of energy saving.

[0082] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A tubular electric drive chassis, characterized in that: include: Two steering front axles; Two driving rear axles, the two steering front axles and the two driving rear axles are respectively equipped with differentials and are respectively connected through a tubular frame, the tubular frame is respectively equipped with planetary gears corresponding to each differential, and the planetary gears are respectively connected to the corresponding differentials; A plurality of drive motors are respectively arranged between the two steering front axles, between the two driving rear axles, and between one steering front axle and one driving rear axle; each of the drive motors is respectively connected to the corresponding differential or the planetary gear; A plurality of wheels are respectively connected to the corresponding steering front axle and driving rear axle; as well as A vehicle beam, connecting the two steering front axles and the two driving rear axles into one body; Among them, according to different road conditions and driving requirements, the tubular electric drive chassis switches between all-wheel drive mode, front-wheel drive mode, rear-wheel drive mode or enhanced all-wheel drive mode.

2. The tubular electric drive chassis according to claim 1, characterized in that: The multiple drive motors include a first drive motor, a second drive motor and a third drive motor, the first drive motor is arranged between the two steering front axles, the second drive motor is arranged between the two driving rear axles, and the third drive motor is arranged between one of the steering front axles and the driving rear axle; the front output shaft and the rear output shaft of the third drive motor are respectively connected to the corresponding differential through corresponding planetary gears; the front output shaft of the first drive motor is connected to the corresponding planetary gear, and the rear output shaft of the first drive motor is connected to the corresponding differential; the front output shaft of the second drive motor is connected to the corresponding differential, and the rear output shaft of the second drive motor is connected to the corresponding planetary gear.

3. The tubular electric drive chassis according to claim 1, characterized in that: The multiple wheels are connected to the corresponding steering front axle and driving rear axle through swing half shafts respectively.

4. The tubular electric drive chassis according to claim 1, 2 or 3, characterized in that: In the front-wheel drive mode, the first drive motor works and the rear steering front axle of the two steering front axles is driven; in the rear-wheel drive mode, the second drive motor works and the front driving rear axles of the two driving rear axles are driven to achieve energy-saving and high-speed transportation when the road conditions are good or the load is light.

5. The tubular electric drive chassis according to claim 1, 2 or 3, characterized in that: In the all-wheel drive mode, the first drive motor outputs power to the corresponding planetary gears and transmits the power to the corresponding differential to drive the front steering front axle of the two steering front axles; the rear steering front axle of the two steering front axles is directly driven by the first drive motor driving the corresponding differential; the second drive motor outputs power to the corresponding planetary gears and transmits the power to the corresponding differential to drive the rear drive rear axle of the two drive rear axles; the front drive rear axle of the two drive rear axles is directly driven by the second drive motor driving the corresponding differential.

6. The tubular electric drive chassis according to claim 5, characterized in that: In the enhanced all-wheel drive mode, the third drive motor drives the rear steering front axle of the two steering front axles and the front driving rear axle of the two driving rear axles through corresponding planetary gear coupling to participate in driving the entire vehicle.

7. The tubular electric drive chassis according to claim 1, 2 or 3, characterized in that: The multiple drive motors are all inner rotor motors, and each of the drive motors includes a motor housing, a motor stator, a motor rotor, a front output shaft and a rear output shaft. The motor stator is arranged in the motor housing, the motor rotor is arranged corresponding to the motor stator, and the front output shaft and the rear output shaft are respectively connected to the motor rotor.

8. The tubular electric drive chassis according to claim 4, characterized in that: The multiple drive motors all adopt a water-cooled heat dissipation structure, and the heat of the motor stator is dissipated through a cooling water channel arranged on the motor housing.

9. The tubular electric drive chassis according to claim 1, 2 or 3, characterized in that: A differential connection part, a planetary gear connection part and an air spring connection part are respectively arranged on the vehicle beam corresponding to the two steering front axles and the two driving rear axles.

10. A new energy heavy truck, characterized in that: It comprises a chassis and a cargo compartment, a cab and a power battery mounted on the chassis, and the chassis is a tubular electric drive chassis as described in any one of claims 1 to 9.

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