Electric drive axle arrangement, vehicle chassis and wheel-type transport machine

Abstract

Embodiments of the present disclosure provide an electric drive axle device, a vehicle chassis and a wheel type transport machine, wherein the electric drive axle device comprises: a driving driver assembly and a first electric drive assembly in communication connection with the driving driver assembly, the first electric drive assembly being configured to drive a wheel assembly to rotate; a second electric drive assembly configured to drive the wheel assembly to steer; a wheel edge reducer assembly connected between the first electric drive assembly and the wheel assembly, the wheel edge reducer assembly being configured to amplify torque of the first electric drive assembly; and an electronic mechanical brake assembly configured to apply a brake torque to the wheel assembly, the electronic mechanical brake assembly being connected to the wheel edge reducer assembly and comprising a brake motor; wherein the first electric drive assembly comprises a double-winding motor or the first electric drive assembly comprises a first drive motor and a second drive motor, and the second electric drive assembly and / or the brake motor comprises a double-winding motor. The electric drive axle device of the present disclosure can improve safety.

Description

Technical Field

[0001] This disclosure relates to the field of electric drive technology, and in particular to an electric drive axle device, a vehicle chassis, and wheeled transport machinery. Background Technology

[0002] With the rapid development of new energy and intelligent connected vehicle technologies, road vehicles are evolving towards intelligence, greening, and informationization. Existing steering systems suffer from low electro-hydraulic energy conversion efficiency, insufficient steering wheel assistance, weak self-centering ability, and high vibration and noise levels, affecting driving comfort. Electric steer-by-wire technology can effectively solve these problems and support autonomous driving. New energy and autonomous vehicles are driving the technological iteration of electric steering systems.

[0003] As electrical components account for an increasingly larger proportion of the vehicle's overall structure, the redundancy and safety requirements for electric drive axles are becoming increasingly stringent, driving innovation in related technical standards and testing systems. However, electric drive axles contain numerous electrical components, posing risks such as drive motor failure, steering motor failure, and brake motor failure. Existing technologies lack comprehensive redundancy and safety designs to address these failure risks, resulting in poor safety for electric drive axles. Summary of the Invention

[0004] This disclosure provides an electric drive axle assembly, a vehicle chassis, and wheeled transport machinery, which can improve the safety of the electric drive axle assembly.

[0005] The first aspect of this disclosure provides an electric drive bridge device, comprising:

[0006] A driving drive assembly and a first electric drive assembly communicatively connected thereto, the first electric drive assembly being configured to drive the wheel assembly to rotate;

[0007] The second electric drive assembly is configured to drive the wheel assembly to steer.

[0008] A wheel-side reducer assembly, connected between the first electric drive assembly and the wheel assembly, is configured to amplify the torque of the first electric drive assembly; and

[0009] An electromechanical braking assembly is configured to apply braking torque to a wheel, the electromechanical braking assembly being connected to a wheel-side reduction gear assembly and including a brake motor;

[0010] The first electric drive assembly includes a dual-winding motor, or the first electric drive assembly includes a first drive motor and a second drive motor, and the second electric drive assembly and / or brake motor includes a dual-winding motor.

[0011] In some embodiments, the wheel assembly includes a first wheel and a second wheel, and the wheel-side reducer assembly includes a first wheel-side reducer and a second wheel-side reducer. The first wheel-side reducer is connected between the first electric drive assembly and the first wheel and is configured to amplify the torque driving the first wheel to rotate. The second wheel-side reducer is connected between the first electric drive assembly and the second wheel and is configured to amplify the torque driving the second wheel to rotate.

[0012] In some embodiments, the electromechanical braking assembly includes a first electromechanical brake and a second electromechanical brake. The first electromechanical brake is connected to a first wheel-side reducer, and the second electromechanical brake is connected to a second wheel-side reducer. The first electromechanical brake and / or the second electromechanical brake include a brake actuator, a brake reducer, a brake component, and a brake motor. The brake reducer is configured to amplify the torque of the brake motor, and the brake component is configured to press against the brake disc.

[0013] In some embodiments, the first electric drive assembly includes a dual-winding motor, which includes a first drive winding and a second drive winding that are redundant with each other, and the driver assembly is configured to control the first drive winding and the second drive winding.

[0014] In some embodiments, the driver assembly includes a first driver and a second driver, the first electric drive assembly includes a first drive motor and a second drive motor that are redundant with each other, the first driver is configured to control the first drive motor, and the second driver is configured to control the second drive motor.

[0015] In some embodiments, the electric drive axle device further includes a differential mechanism, a main reducer, and a drive shaft assembly, wherein the differential mechanism is connected between the first electric drive assembly and the main reducer, and the drive shaft assembly is connected between the main reducer and the wheel-side reducer assembly.

[0016] In some embodiments, the driving drive assembly, the second electric drive assembly, and the electromechanical braking assembly are all communicatively connected to the vehicle controller.

[0017] In some embodiments, the electric drive bridge device achieves power transmission and control signal transmission only through wiring harness connection.

[0018] A second aspect of this disclosure provides a vehicle chassis including the electric drive axle device of the above embodiments.

[0019] This disclosure provides a third aspect of wheeled transport machinery, including the electric drive axle device of the above embodiments or the vehicle chassis of the above embodiments.

[0020] The electric drive axle device of this disclosure uses an electric motor as the power source for driving, steering, and braking, and all have safety redundancy. The structure is simple and reliable, and the response speed is faster than that of hydraulic / pneumatic systems. It can ensure the safety and effectiveness of basic driving, steering, and braking functions, and improve the safety of the electric drive axle device. The electromechanical braking component is connected to the wheel-side reducer component, which can realize the compact integration of driving and braking at the wheel side, occupy little space, and is easy to arrange and maintain. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings have changed some of the mutual spacing or dimensions to facilitate showing the position of each component, and the drawings do not limit the actual size or proportional relationship of each component.

[0022] Figure 1 This is a schematic diagram of the structure of some embodiments of the electric drive bridge device disclosed herein.

[0023] Figure 2 This is a schematic diagram of the structure of some embodiments of the second electric drive assembly of the electric drive bridge device disclosed herein.

[0024] Figure 3 This is a schematic diagram of the structure of some embodiments of the electromechanical brake of the electric drive bridge device disclosed herein.

[0025] Figure 4 This is a schematic diagram of the control coordination of the first embodiment of the electric drive bridge device disclosed herein.

[0026] Figure 5 This is a control coordination diagram of the second embodiment of the electric drive bridge device disclosed herein.

[0027] Explanation of reference numerals in the attached drawings: 1. First electric drive assembly; 2. Second electric drive assembly; 3. Wheel-side reducer assembly; 4. Electromechanical brake assembly; 5. Differential mechanism; 6. Main reducer; 7. Drive shaft assembly; 8. Steering tie rod; 9. Steering trapezoidal arm; 31. First wheel-side reducer; 32. Second wheel-side reducer; 41. First electromechanical brake; 42. Second electromechanical brake; 401. Brake actuator; 402. Brake reducer; 403. Braking component; 404. Brake motor. Detailed Implementation

[0028] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure, that is, this disclosure is not limited to the described embodiments.

[0029] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0030] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0031] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0032] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0034] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0035] First, such as Figures 1 to 5 As shown, this disclosure proposes an electric drive bridge device, comprising:

[0036] A driving drive assembly and a first electric drive assembly 1 communicatively connected thereto, the first electric drive assembly 1 being configured to drive the wheel assembly to rotate.

[0037] The second electric drive component 2 is configured to drive the wheel assembly to steer.

[0038] Wheel-side reducer assembly 3, connected between the first electric drive assembly 1 and the wheel assembly, is configured to amplify the torque of the first electric drive assembly 1; and

[0039] Electromechanical braking assembly 4 is configured to apply braking torque to the wheel, and is connected to wheel-side reducer assembly 3 and includes brake motor 404.

[0040] The first electric drive assembly 1 includes a dual-winding motor or the first electric drive assembly 1 includes a first drive motor and a second drive motor, and the second electric drive assembly 2 and / or brake motor 404 includes a dual-winding motor.

[0041] The electric drive axle unit can be the front axle, middle axle, or rear axle of a vehicle chassis. The dual-winding motor includes a stator, a rotor, and two sets of coil windings. The first electric drive assembly 1 includes a dual-winding motor or two motors, and the second electric drive assembly 2 and / or brake motor 404 includes a dual-winding motor. This enables redundancy in driving, steering, and braking. Under normal conditions, only one motor winding or motor is driven. If one motor winding or motor fails, the other motor winding or motor will drive the vehicle, thus improving the safety of the electric drive axle unit.

[0042] The first electric drive assembly 1 is a driving drive assembly, and the second electric drive assembly 2 is a steering drive assembly. The electric drive axle device may also include a steering tie rod 8 and a steering trapezoidal arm 9. The steering tie rod 8 is connected between the output end of the second electric drive assembly 2 and the steering trapezoidal arm 9. The steering tie rod 8 drives the steering trapezoidal arm 9 to swing so as to directly drive the wheel to deflect and steer.

[0043] In this embodiment, the electric drive axle device uses electric motors as power sources for driving, steering, and braking, and all have safety redundancy. The structure is simple and reliable, and the response speed is faster than that of hydraulic / pneumatic systems. It can ensure the safety and effectiveness of basic driving, steering, and braking functions, and improve the safety of the electric drive axle device. The electromechanical braking component 4 is connected to the wheel-side reducer component 3, which can realize the compact integration of driving and braking at the wheel side, occupying little space and facilitating layout and maintenance.

[0044] In some embodiments, such as Figures 1 to 5 As shown, the wheel assembly includes a first wheel and a second wheel, and the wheel-side reducer assembly 3 includes a first wheel-side reducer 31 and a second wheel-side reducer 32. The first wheel-side reducer 31 is connected between the first electric drive assembly 1 and the first wheel and is configured to amplify the torque driving the first wheel to rotate. The second wheel-side reducer 32 is connected between the first electric drive assembly 1 and the second wheel and is configured to amplify the torque driving the second wheel to rotate. The first electric drive assembly 1 simultaneously drives the first wheel-side reducer 31 and the second wheel-side reducer 32 through the differential mechanism 5 and the main reducer.

[0045] This embodiment enables independent speed reduction and torque increase for the left and right wheels by configuring independent wheel-side reducers for each wheel. By distributing part of the reduction ratio to the wheel-side, the size and weight of the main reducer can be reduced. The wheel-side reducers are close to the wheels, which can also improve load distribution, make the axle housing structure more uniform, and reduce stress concentration.

[0046] In some embodiments, the electromechanical braking assembly 4 includes a first electromechanical brake 41 and a second electromechanical brake 42. The first electromechanical brake 41 is connected to a first wheel-side reducer 31, and the second electromechanical brake 42 is connected to a second wheel-side reducer 32. The first electromechanical brake 41 and / or the second electromechanical brake 42 include a brake actuator 401, a brake reducer 402, a brake component 403, and a brake motor 404. The brake reducer 402 is configured to amplify the torque of the brake motor 404, and the brake component 403 is configured to press against the brake disc.

[0047] In this embodiment, the left and right wheels are equipped with independent electromechanical brakes, and the two brakes are redundant. When one brake fails, the other can still provide braking capability. The brake reducer 402 can amplify the torque of the brake motor 404, and in conjunction with the brake component 403, a larger braking torque can be achieved.

[0048] In some embodiments, such as Figure 5 As shown, the first electric drive assembly 1 includes a dual-winding motor, which includes a first drive winding and a second drive winding that are redundant with each other. The driving drive assembly is configured to control the first drive winding and the second drive winding.

[0049] This embodiment achieves a redundant driving design through a dual-winding motor. When any coil winding fails, the other coil winding can serve as a backup drive, ensuring uninterrupted operation of the first electric drive component 1, avoiding the risk of power interruption, and improving the safety of the electric drive bridge device.

[0050] In some embodiments, such as Figure 4 As shown, the driver assembly includes a first driver and a second driver. The first electric drive assembly 1 includes a first drive motor and a second drive motor that are redundant with each other. The first driver is configured to control the first drive motor, and the second driver is configured to control the second drive motor.

[0051] This embodiment achieves a redundant driving design through dual drivers and dual drive motors. When any driver or drive motor fails, the other drive motor can serve as a backup, ensuring uninterrupted operation of the first electric drive component 1, avoiding the risk of power interruption, and improving the safety of the electric drive axle device.

[0052] In some embodiments, such as Figure 4 and Figure 5 As shown, the electric drive axle device also includes a differential mechanism 5, a main reducer 6, and a drive shaft assembly 7. The differential mechanism 5 is connected between the first electric drive assembly 1 and the main reducer 6, and the drive shaft assembly 7 is connected between the main reducer 6 and the wheel-side reducer assembly 3.

[0053] The drive shaft assembly 7 may include a first drive shaft and a second drive shaft. The first drive shaft is connected between the main reducer 6 and the first wheel-side reducer 31, and the second drive shaft is connected between the main reducer 6 and the second wheel-side reducer 32. When the first electric drive assembly 1 includes a first drive motor and a second drive motor, the differential mechanism 5 is connected between the first drive motor and the main reducer 6, and the differential mechanism 5 is also connected between the second drive motor and the main reducer 6.

[0054] The differential mechanism 5 in this embodiment can ensure that the inner and outer wheels automatically form a speed difference when the vehicle turns, avoiding tire wear; the main reducer 6 can meet the high torque demand through gear reduction and torque amplification; the drive shaft assembly 7 reliably transmits power to the wheel-side reducer, with a compact layout and high transmission efficiency, which can improve the driving performance and system integration of the electric drive axle device and adapt to the needs of high load and multi-condition operation.

[0055] In some embodiments, the driving drive assembly, the second electric drive assembly 2, and the electromechanical braking assembly 4 are all communicatively connected to the vehicle controller. The brake driver 401 of the electromechanical brake of the electromechanical braking assembly 4 is communicatively connected to the vehicle controller.

[0056] This embodiment integrates the driving drive assembly, the second electric drive assembly 2, and the electromechanical braking assembly 4 into the vehicle controller, which simplifies the wiring harness layout, reduces fault points, and enables centralized scheduling and coordinated control of power, steering, and braking.

[0057] In some embodiments, the electric drive axle device achieves power transmission and control signal transmission only through wiring harness connection, so that driving, steering, and braking do not require drive shafts, hydraulic oil pipes or air pressure lines, and can realize steer-by-wire and brake-by-wire.

[0058] In some specific embodiments, such as Figures 1 to 5 As shown, the electric drive bridge device disclosed herein includes multiple redundant safety features:

[0059] (1) High-tonnage redundant drive-by-wire electric drive: The drive unit adopts a high-power drive and has two redundancy structures: ① The first drive (drive 1) controls the first drive motor (drive motor 1), and the second drive (drive 2) controls the second drive motor (drive motor 2). The two transmit torque to the main reducer 6 through the differential mechanism 5. The main reducer 6 transmits the torque to the first wheel-side reducer 31 (wheel-side reducer left) and the second wheel-side reducer 32 (wheel-side reducer right) through the transmission shaft assembly 7. It has redundancy function to ensure that if one drive motor fails, the other drive motor can still operate. ① The electric drive axle unit is driven to move; ② The driving drive assembly controls the dual-winding drive motor to drive, and transmits torque to the main reducer 6 through the differential mechanism 5. The main reducer 6 transmits torque to the first wheel-side reducer 31 (left wheel-side reducer) and the second wheel-side reducer 32 (right wheel-side reducer) through the transmission shaft assembly 7. It has a redundancy function, ensuring that if one coil winding is damaged, the other coil winding can drive the electric drive axle unit to move; ③ The entire electric drive axle unit can be driven by connecting the wiring harness, eliminating the need for large and space-consuming components such as the transmission shaft, which is beneficial for the overall vehicle layout and for realizing drive-by-wire and unmanned operation;

[0060] (2) Redundant steer-by-wire for heavy-duty vehicles: When the driver turns the steering wheel, the controller drives the second electric drive assembly 2 to extend and retract via CAN signal, thereby driving the steering axle trapezoidal arm to move for steering; the second electric drive assembly 2 includes a dual-winding motor, which can realize redundancy of the steering electric cylinder actuator, ensuring that if one coil winding fails, the other coil winding can continue to provide steering driving force; at the same time, the electric cylinder can output the same torque as the hydraulic cylinder, which can realize the steering of heavy-duty axles; at the same time, the hydraulic pump and hydraulic oil pipe are eliminated, ensuring low noise and clean energy; which is conducive to realizing steer-by-wire and unmanned operation;

[0061] (3) Large-tonnage redundant wire-controlled braking: The electric drive axle is braked by an electromechanical braking assembly 4. When the brake driver 401 of the electromechanical brake receives the CAN signal from the vehicle controller and needs to brake, the brake driver 401 controls the dual-winding brake motor 404 to rotate. The dual-winding brake motor 404 transmits braking force to the braking component 403 through the brake reducer 402 to realize the mechanical braking of the motor. At the same time, it has the redundancy safety of the actuator. When one of the coil windings of the dual-winding brake motor 404 fails, the other coil winding brakes, ensuring the redundancy safety of braking. At the same time, it eliminates the need for hydraulic pumps and hydraulic oil pipes, ensuring low noise and clean energy. It is conducive to realizing wire-controlled and unmanned operation.

[0062] The electric drive axle device of this embodiment has a dual-redundant mechanism for the execution system, with dual-winding motor drive or dual-motor drive, dual-winding steering cylinder drive and dual-winding motor mechanical brake; it features a large-tonnage electrification design, with a high-power drive motor, high-torque electromechanical brake, and the push-pull force of the steering cylinder is equal to the output force of the hydraulic cylinder; the structure is simple, with the drive motor, steering cylinder and electromechanical brake eliminating the need for a drive shaft, hydraulic pump and hydraulic oil pipe, which is beneficial for the overall vehicle space layout; the drive, steering and braking all adopt electric braking scheme, which has low noise and uses clean energy.

[0063] Secondly, this disclosure also provides a vehicle chassis, including the electric drive axle device of the above embodiments.

[0064] The vehicle chassis in this embodiment has high safety.

[0065] Furthermore, this disclosure also provides a wheeled transport machine, including the electric drive axle device of the above embodiments or the vehicle chassis of the above embodiments. The wheeled transport machine may be a wheel loader, etc.

[0066] The wheeled transport machinery in this embodiment has high safety.

[0067] The electric drive axle device, vehicle chassis, and wheeled transport machinery provided in this disclosure have been described in detail above. Specific embodiments have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications to this disclosure without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this disclosure.

Claims

1. An electric drive bridge device, characterized in that, include: A driving drive assembly and a first electric drive assembly (1) communicatively connected thereto, the first electric drive assembly (1) being configured to drive the wheel assembly to rotate; The second electric drive assembly (2) is configured to drive the wheel assembly to steer; A wheel-side reducer assembly (3) is connected between the first electric drive assembly (1) and the wheel assembly, the wheel-side reducer assembly (3) being configured to amplify the torque of the first electric drive assembly (1); and An electromechanical braking assembly (4) is configured to apply braking torque to the wheel, the electromechanical braking assembly (4) being connected to the wheel-side reducer assembly (3) and including a brake motor (404). Wherein, the first electric drive assembly (1) includes a dual-winding motor or the first electric drive assembly (1) includes a first drive motor and a second drive motor, and the second electric drive assembly (2) and / or the brake motor (404) includes a dual-winding motor.

2. The electric drive bridge device according to claim 1, characterized in that, The wheel assembly includes a first wheel and a second wheel, and the wheel-side reducer assembly (3) includes a first wheel-side reducer (31) and a second wheel-side reducer (32). The first wheel-side reducer (31) is connected between the first electric drive assembly (1) and the first wheel and is configured to amplify the torque driving the first wheel to rotate. The second wheel-side reducer (32) is connected between the first electric drive assembly (1) and the second wheel and is configured to amplify the torque driving the second wheel to rotate.

3. The electric drive bridge device according to claim 2, characterized in that, The electromechanical braking assembly (4) includes a first electromechanical brake (41) and a second electromechanical brake (42). The first electromechanical brake (41) is connected to the first wheel-side reducer (31), and the second electromechanical brake (42) is connected to the second wheel-side reducer (32). The first electromechanical brake (41) and / or the second electromechanical brake (42) include a brake actuator (401), a brake reducer (402), a brake component (403), and the brake motor (404). The brake reducer (402) is configured to amplify the torque of the brake motor (404), and the brake component (403) is configured to press the brake disc.

4. The electric drive bridge device according to claim 1, characterized in that, The first electric drive assembly (1) includes a dual-winding motor, which includes a first drive winding and a second drive winding that are redundant with each other. The driving drive assembly is configured to control the first drive winding and the second drive winding.

5. The electric drive bridge device according to claim 1, characterized in that, The driving drive assembly includes a first drive and a second drive. The first electric drive assembly (1) includes a first drive motor and a second drive motor that are redundant with each other. The first drive is configured to control the first drive motor, and the second drive is configured to control the second drive motor.

6. The electric drive bridge device according to any one of claims 1 to 5, characterized in that, It also includes a differential mechanism (5), a main reducer (6) and a drive shaft assembly (7), wherein the differential mechanism (5) is connected between the first electric drive assembly (1) and the main reducer (6), and the drive shaft assembly (7) is connected between the main reducer (6) and the wheel-side reducer assembly (3).

7. The electric drive bridge device according to any one of claims 1 to 5, characterized in that, The driving drive assembly, the second electric drive assembly (2), and the electromechanical braking assembly (4) are all communicatively connected to the vehicle controller.

8. The electric drive bridge device according to any one of claims 1 to 5, characterized in that, The electric drive bridge device achieves power transmission and control signal transmission only through wiring harness connection.

9. A vehicle chassis, characterized in that, Includes the electric drive bridge device as described in any one of claims 1 to 8.

10. A wheeled transport machine, characterized in that, Includes the electric drive axle device as described in any one of claims 1 to 8 or the vehicle chassis as described in claim 9.

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