Electric drive module, chassis platform, and wheeled transport machine

Abstract

The present disclosure relates to an electric drive module, a chassis platform, and a wheeled transport machine. The chassis platform comprises a frame and at least one pair of identical electric drive modules connected to the frame; each electric drive module is configured to independently drive one wheel of a wheeled transport machine; each electric drive module comprises a driving assembly, a steering assembly, and a suspension assembly; the driving assembly is configured to be connected between the frame and the wheel to drive the wheel to rotate; the steering assembly is configured to be connected between the frame and the wheel to drive the wheel to turn; and the suspension assembly is configured to be connected between the frame and the steering assembly. The chassis platform comprises at least one pair of the electric drive modules. The wheeled transport machine comprises the electric drive modules or the chassis platform.

Description

Electric drive modules, chassis platforms and wheeled transport machinery

[0001] Horizontal citation of related applications

[0002] This disclosure is based on and claims priority to Chinese application No. 202411970475.3 filed on December 30, 2024, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure relates to an electric drive module, a chassis platform, and wheeled transport machinery. Background Technology

[0004] Wheeled transport machinery in related technologies, such as off-highway wide-body dump trucks and mining dump trucks, typically face the problem of poor commonality of power transmission system components, especially in the matching of core components such as engines, motors, gearboxes, and drive axles. For example, mining trucks of different tonnages not only require engines with corresponding power based on their carrying capacity, but also need to be equipped with motors of corresponding torque and compatible axles. This not only increases the cost of parts production, procurement, and management for equipment manufacturers, but also raises the manufacturing cost of the products. Furthermore, the spare parts management and maintenance costs faced by users during operation also increase accordingly.

[0005] It should be noted that the information disclosed in the background section of this disclosure is intended only to enhance the understanding of the overall background of this disclosure, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] This disclosure provides an electric drive module, a chassis platform, and wheeled transport machinery, enabling modular design of the drive system for the transport machinery.

[0007] A first aspect of this disclosure provides an electric drive module for a chassis platform of wheeled transport machinery. The chassis platform includes a frame and at least one pair of identical electric drive modules connected to the frame, wherein each electric drive module is configured to independently drive one wheel of the wheeled transport machinery, and each includes:

[0008] Drive assembly, configured to connect between the frame and the wheel to drive the wheel to rotate;

[0009] Steering assembly, configured to connect between the frame and the wheels to drive the wheels to steer; and

[0010] The suspension assembly is configured to connect the vehicle frame and the steering assembly.

[0011] In some embodiments,

[0012] The drive assembly is symmetrical about the radial section of the wheel; and / or

[0013] The suspension components are symmetrical about the radial section of the wheel.

[0014] In some embodiments, the steering assembly includes a steering knuckle, which is symmetrical about the radial section of the wheel and is fixedly connected to the wheel.

[0015] In some embodiments, the steering assembly further includes a steering mechanism movably connected between the frame and the steering knuckle.

[0016] In some embodiments, the steering mechanism includes a steering knuckle arm and a steering cylinder, the steering knuckle arm being fixedly connected to the steering knuckle, and the two ends of the steering cylinder being hinged to the steering knuckle arm and the vehicle frame, respectively.

[0017] In some embodiments, the suspension assembly is hinged to the steering knuckle.

[0018] In some embodiments, the suspension assembly includes a suspension cylinder, the two ends of which are hinged to the vehicle frame and the steering knuckle, respectively.

[0019] In some embodiments, the suspension assembly includes a first wishbone, a first hinge portion is provided on the steering knuckle, and the two ends of the first wishbone are respectively hinged to the vehicle frame and the first hinge portion.

[0020] In some embodiments, the suspension assembly further includes a second wishbone, wherein the steering knuckle is provided with a second hinge portion that is vertically spaced from the first hinge portion, and the two ends of the second wishbone are respectively hinged to the vehicle frame and the second hinge portion.

[0021] In some embodiments,

[0022] The first fork arm is ball-jointed to the first hinge portion; and / or

[0023] The second fork arm is connected to the second hinge part by a ball joint.

[0024] In some embodiments, the drive assembly includes a motor and a drive shaft, the motor being mounted within the vehicle frame, and the two ends of the drive shaft being connected to the motor and the wheels, respectively.

[0025] In some embodiments, the frame includes a support beam and an anti-torsion tube connected to the support beam, with the motor mounted inside the anti-torsion tube.

[0026] In some embodiments, the steering knuckle has a through hole extending axially along the wheel, and the drive shaft passes through the through hole.

[0027] In some embodiments, the drive assembly further includes a speed reducer connected between the drive shaft and the wheel.

[0028] In some embodiments, the speed reducer includes a spur gear speed reducer.

[0029] In some embodiments, the drive assembly further includes a braking device integrated on the gearbox.

[0030] In some embodiments,

[0031] The drive components are removable from the frame and wheels; and / or

[0032] The steering components are removable from the frame and wheels; and / or

[0033] The suspension components are removable from the chassis.

[0034] A second aspect of this disclosure provides a chassis platform for wheeled transport machinery, the chassis platform including at least one pair of the aforementioned electric drive modules for the chassis platform for wheeled transport machinery, each electric drive module being configured to independently drive one wheel of the wheeled transport machinery.

[0035] In some embodiments, the chassis platform further includes a power module and a hydraulic module, the power module being configured to provide electrical power to the drive components and the hydraulic module being configured to provide hydraulic power to the steering components and / or suspension components.

[0036] In some embodiments, the chassis platform further includes a controller that is signal-connected to the power module and the hydraulic module, and the controller is configured to output commands to the power module and / or the hydraulic module to control the operation of at least one of the drive assembly, the steering assembly, and the suspension assembly.

[0037] A third aspect of this disclosure provides a wheeled transport machine, including the electric drive module of the chassis platform for the wheeled transport machine described above, or including the chassis platform for the wheeled transport machine described above.

[0038] Based on the above technical solution, this disclosure sets up an electric drive module to drive the wheels independently. The electric drive module integrates drive, steering and suspension functions. On the one hand, it can reduce the number of parts that need to be assembled separately, simplify the production and assembly process, and reduce the complexity of maintenance and repair. On the other hand, the electric drive module can effectively control the individual rotation and steering of the wheels it drives, and provide shock absorption function at each wheel, which helps to improve the overall handling and operational stability of the wheeled transport machinery. Attached Figure Description

[0039] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0040] Figure 1 shows a schematic diagram of one embodiment of the wheeled transport machinery provided in this disclosure.

[0041] Figure 2 shows a schematic diagram of the structure of an embodiment of the electric drive module provided in this disclosure.

[0042] Figure 3 shows a partial cross-sectional view of an embodiment of the electric drive module provided in this disclosure.

[0043] Figure 4 shows a schematic diagram of the symmetrical arrangement of the suspension components and steering knuckles in one embodiment of the electric drive module provided in this disclosure.

[0044] Figure 5 shows a structural schematic diagram of an embodiment of the chassis platform provided in this disclosure.

[0045] Figure 6 shows a structural schematic diagram of another embodiment of the chassis platform provided in this disclosure.

[0046] Figure 7 shows a structural schematic diagram of yet another embodiment of the chassis platform provided in this disclosure.

[0047] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Support beam; 12. Anti-torsion tube; 2. Wheel; 3. Drive assembly; 31. Motor; 32. Drive shaft; 33. Reducer; 4. Steering assembly; 41. Steering knuckle; 411. First articulation; 412. Second articulation; 413. First ball joint; 414. Second ball joint; 415. Through hole; 42. Steering knuckle arm; 43. Steering cylinder; 44. Steering pin; 5. Suspension assembly; 51. Suspension cylinder; 52. First wishbone; 521. First ball seat; 522. First control arm; 53. Second wishbone; 531. Second ball seat; 532. Second control arm; 6. Power module; 7. Hydraulic module; 8. Controller; 9. Cargo box. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] In related technologies, the chassis system of wheeled transport machinery suffers from drawbacks such as poor versatility of key components and high maintenance costs. For example, different types / tonnages of wheeled transport machinery typically require different specifications of steering axles, drive axles, gearboxes, suspension cylinders, linkage guide mechanisms, and other components. This significantly increases the development and manufacturing costs of wheeled transport machinery components and makes it inconvenient for users to use and maintain these components.

[0055] To address at least some of the aforementioned problems, this disclosure provides a modular design for the drive system of wheeled transport machinery, thereby facilitating the fulfillment of drive requirements for different types / tonns of wheeled transport machinery by configuring different numbers of drive modules and / or by adaptively arranging multiple drive modules.

[0056] Figure 1 shows a schematic diagram of a wheeled transport machine. A first aspect of this disclosure provides an electric drive module for a chassis platform of the wheeled transport machine. The chassis platform includes a frame 1 and at least one pair of identical electric drive modules connected to the frame 1. Each electric drive module is configured to independently drive one wheel 2 of the wheeled transport machine. Each electric drive module includes a drive assembly 3, a steering assembly 4, and a suspension assembly 5. The drive assembly 3 is configured to connect between the frame 1 and the wheel 2 to drive the wheel 2 to rotate. The steering assembly 4 is configured to connect between the frame 1 and the wheel 2 to drive the wheel 2 to steer. The suspension assembly 5 is configured to connect between the frame 1 and the steering assembly.

[0057] Here, the drive assembly 3 drives the wheels 2 to achieve forward and backward movement of the wheeled transport machinery; the steering assembly 4 drives the wheels 2 to achieve left and right steering of the wheeled transport machinery; the suspension assembly 5 is connected between the frame 1 and the steering assembly to provide at least shock absorption for the frame 1, especially when traveling on rough or uneven ground.

[0058] In this embodiment of the disclosure, each electric drive module independently drives one wheel 2, thereby the electric drive module can effectively control the individual rotation and steering of the wheel 2 it drives, and can provide shock absorption function at each wheel 2, which helps to improve the overall maneuverability and operational stability of the wheeled transport machinery.

[0059] The electric drive module provided in this disclosure integrates drive, steering, and suspension functions, which helps simplify the design of the vehicle chassis. Unlike related technologies where these functional components are arranged separately, the integrated electric drive module in this disclosure reduces the number of parts that need to be assembled separately, thereby simplifying the production and assembly process and reducing the complexity of maintenance and repair.

[0060] When facing the load-bearing requirements of wheeled transport machinery of different tonnages, the embodiments of this disclosure can combine electric drive modules in different numbers to form a series of chassis platforms suitable for wheeled transport machinery of different tonnages, effectively shortening the development cycle of new products.

[0061] Referring to Figure 4, in some embodiments, the drive assembly 3 is symmetrical about the radial section of the wheel 2. The suspension assembly 5 is symmetrical about the radial section of the wheel 2.

[0062] Specifically, the symmetrical arrangement in this disclosure differs from the chassis design in related technologies. In related technologies, chassis components such as transmission gears and thrust rods are designed with a primary load-bearing direction, capable of withstanding higher loads when moving forward and weaker loads when moving backward. This results in a chassis structure in related technologies being designed with distinct forward and backward directions, constituting an asymmetrical structural design.

[0063] In this embodiment, by setting the drive assembly 3 and / or suspension assembly 5 to be symmetrical about the radial cross section of the wheel 2, the load on the drive assembly 3 and suspension assembly 5 in the forward and reverse directions is evenly distributed during the forward and reverse travel of the wheeled transport machinery. This achieves high load-bearing capacity and high-power braking energy recovery for bidirectional travel (forward and reverse travel), and can also reduce the asymmetric wear problem caused by travel in different directions, thereby extending the service life of components such as drive assembly 3, suspension assembly 5, and wheel 2.

[0064] Here, the suspension assembly 5 and steering knuckle 41 are symmetrical about the radial sections of the wheel 2, specifically referring to the symmetrical radial sections when the wheeled transport machinery is in a horizontal position with the frame 1 horizontal and the wheel 2 oriented in the same direction as the movement of the frame 1. In this case, the radial section refers to the radial section of the wheel 2 extending along the direction of gravity. It is understandable that during the operation of the wheeled transport machinery, due to changes in the direction of travel, road conditions, etc., the relative positions of some structures of the drive assembly 3 and suspension assembly 5 about the wheel 2 will dynamically change. However, the projection of the connection points of the drive assembly 3 and suspension assembly 5 with the wheel 2 onto the radial surface of the wheel 2 always coincides with the center of the wheel 2. This arrangement ensures that the transmission paths of the interaction forces between the drive assembly 3 and the wheel 2, and between the suspension assembly 5 and the wheel 2, all pass through their geometric centers, thereby helping to ensure the uniformity of force distribution at different locations on these components.

[0065] Referring to Figure 2, in some embodiments, the steering assembly 4 includes a steering knuckle 41. The steering knuckle 41 is symmetrical about the radial section of the wheel 2, and the steering knuckle 41 is fixedly connected to the wheel 2. As an example, the steering knuckle 41 may be fixedly connected to the rim of the wheel 2.

[0066] Referring to Figure 2, in some embodiments, the steering assembly 4 further includes a steering mechanism movably connected between the frame 1 and the steering knuckle 41. Based on this, the wheel 2 can undergo a relative positional change with respect to the frame 1, thereby achieving steering of the wheel 2.

[0067] Referring to Figure 2, in some embodiments, the steering mechanism includes a steering knuckle arm 42 and a steering cylinder 43. The steering knuckle arm 42 is fixedly connected to the steering knuckle 41, and the two ends of the steering cylinder 43 are hinged to the steering knuckle arm 42 and the vehicle frame 1, respectively.

[0068] Based on this, by extending or shortening the steering cylinder 43, the position of the wheel 2 relative to the frame 1 can be changed, thereby achieving steering of the wheel 2.

[0069] Referring to Figure 2, in some examples, the steering mechanism also includes a steering pin 44 for connecting the steering cylinder 43 and the frame 1, both of which are configured to rotate relative to the steering pin 44.

[0070] In some embodiments, the suspension assembly 5 is hinged to the steering knuckle 41.

[0071] The suspension assembly 5 and the steering knuckle 41 are hinged together, allowing the suspension assembly 5 and the steering knuckle 41 to rotate relative to each other. This allows them to adapt to changes in the relative position between the frame 1 and the wheels 2 during the movement of the wheeled transport machinery, thereby improving the stability of the frame 1 and the load-bearing device (such as the cargo box 9 shown in Figure 1) during the operation of the wheeled transport machinery.

[0072] Referring to Figure 2, in some embodiments, the suspension assembly 5 includes a suspension cylinder 51. The two ends of the suspension cylinder 51 are hinged to the vehicle frame 1 and the steering knuckle 41, respectively.

[0073] Based on this, by extending and shortening the suspension cylinder 51, the relative position between the frame 1 and the steering knuckle 41 can be changed, that is, the relative position between the frame 1 and the wheel 2 can be changed. This helps to absorb the vibration caused by uneven road surface during the operation of wheeled transport machinery, provides cushioning, and improves the overall stability of the transport machinery.

[0074] In one example, the suspension cylinder 51 is arranged approximately along the Z-direction to improve the shock resistance of the frame 1 in the Z-direction. The Z-direction can be, for example, the vertical direction.

[0075] Referring to Figure 2, in some embodiments, the suspension assembly 5 includes a first wishbone 52. A first hinge portion 411 is provided on the steering knuckle 41, and the two ends of the first wishbone 52 are hinged to the vehicle frame 1 and the first hinge portion 411, respectively.

[0076] As an example, the first wishbone 52 includes two first arms 522 spaced apart in a generally X direction. Both first arms 522 are hinged to the frame 1, for example, connected to the frame 1 via a rotatable pin. The two first arms 522 can disperse the impact force from the wheel 2, avoiding stress concentration problems on the frame 1 that would occur with a single-point connection. The X direction can be, for example, a horizontal direction or the longitudinal direction of the chassis platform.

[0077] In a specific example, the first fork arm 52 connects the frame 1 and the first hinge 411 along a generally Y-direction. The Y-direction can be, for example, a direction perpendicular to the X and Z directions or the lateral direction of the chassis platform.

[0078] Referring to Figure 2, in some embodiments, the suspension assembly 5 further includes a second wishbone 53. The steering knuckle 41 is provided with a second hinge portion 412 spaced apart from the first hinge portion 411 in the Z direction or vertical direction, and the two ends of the second wishbone 53 are respectively hinged to the frame 1 and the second hinge portion 412.

[0079] As an example, the second wishbone 53 includes two second arms 532 spaced apart in a generally X direction. Both second arms 532 are hinged to the frame 1, for example, by a rotatable pin connection. The two second arms 532 can disperse the impact force from the wheel 2, avoiding stress concentration problems on the frame 1 that would occur with a single-point connection.

[0080] In a specific example, the second fork arm 53 connects the frame 1 and the second hinge 412 in the generally Y direction.

[0081] In some embodiments where the suspension assembly 5 includes a first wishbone 52 and a second wishbone 53, the first wishbone 52 and the second wishbone 53 together form a double wishbone suspension structure. Compared to a single wishbone suspension structure, a double wishbone suspension structure can more effectively buffer ground impact forces, reduce vibration of the chassis 1, and bring better driving stability to wheeled transport machinery.

[0082] In the above embodiment, by setting two support arms arranged at intervals along the X direction on the fork arm and hinged to the frame 1, the frame 1 can swing relative to the wheel 2 in the Z direction, thereby buffering the impact force on the frame 1 in the Z direction, such as the impact force caused by uneven road surface.

[0083] Referring to Figure 2, as an example, in the Z direction, the first fork arm 52 is positioned above the second fork arm 53.

[0084] In some embodiments, the first fork arm 52 is ball-jointed to the first hinge portion 411. The second fork arm 53 is ball-jointed to the second hinge portion 412.

[0085] The ball joint provides a large range of rotation, allowing for sufficient freedom of movement and flexibility between the first wishbone 52 and the steering knuckle 41, and / or between the second wishbone 53 and the steering knuckle 41, to adapt to complex environments or road conditions. Especially when wheeled transport machinery encounters uneven road surfaces, the resulting impacts typically act on the wheels 2 from multiple directions. The ball joint better adapts to these multi-directional impacts, enabling the suspension assembly 5 to better absorb these impacts and improve the overall stability of the wheeled transport machinery. Furthermore, the spherical fit structure of the ball joint helps reduce the impact and wear on related components of the suspension assembly 5 and the steering assembly 4, extending their service life.

[0086] Specifically, in some embodiments, referring to FIG3, the steering knuckle 41 is provided with a first ball joint 413 and a second ball joint 414, the first wishbone 52 is provided with a first ball seat 521 that mates with the first ball joint 413, and the second wishbone 53 is provided with a second ball seat 531 that mates with the second ball joint 414. The first ball seat 521 is fitted around the outer periphery of the first ball joint 413, and the first ball seat 521 and the first ball joint 413 are configured to rotate relative to each other. The second ball seat 531 is fitted around the outer periphery of the second ball joint 414, and the second ball seat 531 and the second ball joint 414 are configured to rotate relative to each other.

[0087] In some embodiments of the suspension assembly 5, which includes a suspension cylinder 51, a first wishbone 52, and a second wishbone 53, the first wishbone 52 is positioned above the second wishbone 53, and the suspension cylinder 51 is hinged to the first ball seat 521 of the first wishbone 52.

[0088] Through the coordinated action of the suspension cylinder 51, the first fork arm 52 and the second fork arm 53, relative swinging and relative rotation between the frame 1 and the wheel 2 can be achieved, thus meeting the requirements of driving activity and stability of wheeled transport machinery.

[0089] Referring to Figure 2, in some embodiments, the drive assembly 3 includes a motor 31 and a drive shaft 32. The motor 31 is mounted inside the frame 1, and the two ends of the drive shaft 32 are connected to the motor 31 and the wheel 2, respectively.

[0090] Based on this, the drive shaft 32 can transmit the torque output by the motor 31 to the wheel 2, thereby driving the wheel 2.

[0091] Installing the motor 31 inside the chassis 1 can, on the one hand, prevent the motor 31 from being directly exposed to the external environment, reduce the erosion and impact of mud, rainwater, dust, etc. on the motor 31, and extend the service life of the motor 31; on the other hand, it also helps to reduce the unsprung mass of the chassis platform of the wheeled transport machinery and improve the shock absorption performance of the chassis platform.

[0092] As an example, the frame 1 has a mounting base on which the motor 31 is mounted.

[0093] Referring to Figure 1, in some embodiments, the frame 1 includes a support beam 11 and an anti-torsion tube 12 connected to the support beam 11, and the motor 31 is installed inside the anti-torsion tube 12.

[0094] As a spring-loaded component, the anti-torsion tube 12 is less affected by road impact and vibration, has a low failure rate, and can provide a sufficiently robust housing protection for the motor 31, thereby improving the reliability of the drive assembly 3.

[0095] As an example, the anti-torsion tube 12 can be configured as a circular tube, a U-shaped tube, or a polygonal tube with a cavity for accommodating the motor 31.

[0096] Referring to Figure 3, in some embodiments, the steering knuckle 41 is provided with a through hole 415 extending axially along the wheel 2, and the drive shaft 32 passes through the through hole 415.

[0097] A through hole 415 is provided on the steering knuckle 41 so that the drive shaft 32 can pass directly through the steering knuckle 41 and transmit power to the wheel 2. This avoids the need for additional mounting structures or power transmission structures. On the one hand, it can improve the power transmission efficiency, and on the other hand, it can effectively reduce the space occupied between components and achieve a compact layout of the electric drive module as a whole.

[0098] Referring to Figures 1 and 2, in some embodiments, the drive assembly 3 further includes a speed reducer 33. The speed reducer 33 is connected between the drive shaft 32 and the wheel 2. As an example, the end of the drive shaft 32 away from the motor 31 is connected to the input flange of the speed reducer 33 through a through-hole 415.

[0099] The reducer 33, in conjunction with the characteristic settings of the motor 31, can convert the output speed and torque of the motor 31 (e.g., high speed and low torque) into a speed and torque (e.g., low speed and high torque) suitable for driving the wheels 2, thereby achieving effective matching between the drive component 3 and the working conditions of the wheeled transport machinery.

[0100] In addition, compared with the gearbox used for transmission in related technologies, the reducer 33 has the characteristics of simple structure, small size and low mechanical loss, which helps to reduce the use and maintenance cost of drive component 3.

[0101] In some embodiments, the motor 31, drive shaft 32, and reducer 33 are designed based on the travel requirements in both forward and reverse directions, so that the load on the wheels 2 and the aforementioned related components remains consistent during the forward and reverse travel of the wheeled transport machinery. Unlike related technologies where structural limitations of components such as the drive axle and main reducer prevent full-power braking and affect energy recovery efficiency, the motor 31, drive shaft 32, and reducer 33 provided in this disclosure are designed based on the travel requirements in both forward and reverse directions, for example, with a symmetrical structure about the wheels 2. This ensures that the load on these components remains consistent during forward and reverse travel, which helps improve energy recovery efficiency and the operational life of the wheeled transport machinery in both forward and reverse directions.

[0102] Specifically, in some examples, the reducer 33 includes a spur gear reducer.

[0103] The consistent meshing characteristics of spur gears in both forward and reverse rotation ensure that the stability of power transmission in a spur gear reducer remains unchanged regardless of the direction of travel (forward or backward). Therefore, in both forward and backward operation of wheeled transport machinery, wheel 2 receives the same power characteristics, reducing the problem of uneven wear on related components caused by load differences under different operating conditions.

[0104] In some embodiments, the drive assembly 3 further includes a braking device integrated on the reducer 33.

[0105] Integrating the braking device into the reducer 33 improves braking efficiency and enhances the overall compactness of the drive assembly, facilitating miniaturization of the electric drive module. Furthermore, the integration of the braking device with the reducer 33 within the electric drive module optimizes the motor's energy recovery process, improving overall vehicle energy efficiency through dynamic allocation of braking force and energy recovery efficiency.

[0106] The specific form and structure of the braking device can be selected based on the structure of the reducer 33, the braking requirements of wheeled motion machinery, etc.

[0107] For example, in some examples, the braking device includes a wet brake, and in particular, a travel-parking integrated wet brake.

[0108] In some embodiments, the hydraulic module is used to provide hydraulic energy to the wet brake. In some specific examples, the braking device may share the hydraulic module with the hydraulic components (e.g., steering cylinder 43) in the steering assembly 4, thereby facilitating a compact design of the electric drive unit.

[0109] In some embodiments, referring to Figures 1 and 2, the integrated braking device and reducer 33 can be arranged radially inside the rim of the wheel 2, further saving installation space and achieving integrated arrangement.

[0110] As an example, the output end of the reducer 33 is fixedly connected to the rim of the wheel 2.

[0111] In some embodiments, the drive assembly 3 is removably connected to the frame 1 and the wheel 2; and / or the steering assembly 4 is removably connected to the frame 1 and the wheel 2; and / or the suspension assembly 5 is removably connected to the frame 1.

[0112] The removable connection design allows the individual components of the electric drive module, such as the drive, steering, and suspension, to be disassembled and replaced independently. It also facilitates the assembly and disassembly of the electric drive module relative to the chassis platform of the wheeled transport machinery, making regular maintenance and upkeep easier.

[0113] Specifically, when the electric drive module experiences a fault that is difficult to resolve in the short term during operation, the removable connection design allows for the rapid removal of the faulty component (such as drive component 3, steering component 4, or suspension component 5), enabling quick replacement of the electric drive module or related faulty components and avoiding prolonged downtime of wheeled transport machinery.

[0114] This disclosure does not limit the specific form of the removable connection. For example, various detachable connection methods such as pin connection and bolt connection can be selected according to the actual situation.

[0115] As an example, the motor 31 of the drive assembly 3 is detachably mounted on a mounting base inside the frame 1, the output flange of the motor 31 is connected to the drive shaft 32 by bolts, and the output housing of the reducer 33 of the drive assembly 3 is connected to the rim of the wheel 2 by bolts.

[0116] As an example, the steering cylinder 43 of the steering assembly 4 is connected to the frame 1 via a steering pin 44, and the steering cylinder 43 can also be connected to the steering knuckle 41 via a pin.

[0117] As an example, the suspension cylinder 51 of the suspension assembly 5 is connected to the frame 1 by a pin, and the first wishbone 52 and the second wishbone 53 of the suspension assembly 5 are both connected to the frame 1 by pins.

[0118] A second aspect of this disclosure provides a chassis platform for wheeled transport machinery, the chassis platform including at least one pair of the aforementioned electric drive modules, each electric drive module being configured to independently drive one wheel of the wheeled transport machinery.

[0119] Because each wheel is driven by an independent electric drive module, wheeled transport machinery can be customized to operate in various working environments. For example, the distribution of drive force or the steering angle of different wheels can be adjusted as needed to adapt to different work tasks, such as traction, handling, and transportation.

[0120] Furthermore, this electric drive module can be flexibly applied to chassis platforms of different types of wheeled transport machinery. Specifically, the number and location of the electric drive modules can be adaptively arranged on the chassis platform according to the type, specifications, or load requirements of the wheeled transport machinery.

[0121] For example, two, four, six, or eight electric drive modules can be arranged, or a pair of electric drive modules can be arranged on the front or rear wheels of a wheeled transport vehicle, or a certain number of electric drive modules can be distributed relative to the entire chassis platform to independently drive different numbers or different positions of the wheels 2 to meet different transportation needs.

[0122] To more clearly explain how electric drive modules are designed in practical applications, this explanation is based on a specific embodiment in which wheeled transport machinery is configured as a mining car.

[0123] In this specific embodiment, to meet the load-bearing requirements of mining trucks of different tonnages, the electric drive modules can be combined in different quantities to form a series of chassis platforms suitable for mining trucks of different tonnages, effectively shortening the new product development cycle. The main components of the electric drive module (such as the motor, reducer, suspension cylinder, steering cylinder, etc.) can adopt standardized specifications and interface sizes, thereby reducing the development and manufacturing costs of these components, greatly simplifying inventory and spare parts management for manufacturers and users, and improving the maintenance efficiency of related products.

[0124] Referring to Figure 5, in some embodiments, the chassis platform further includes a power module 6 and a hydraulic module 7. The power module 6 is configured to provide electrical power to the drive assembly 3. The hydraulic module 7 is configured to provide hydraulic power to the steering assembly 4 and / or the suspension assembly 5.

[0125] By configuring the power module 6 and the hydraulic module 7 as independent modules, it is easy to maintain and manage either module separately, which can reduce repair time and maintenance costs.

[0126] Each electric drive module can be powered by a separate power module 6 or hydraulic module 7. Alternatively, the chassis platform can have only one power module 6 or one hydraulic module 7, which then powers all the electric drive modules separately.

[0127] Referring to Figure 5, in some embodiments, the chassis platform further includes a controller 8, which is signal-connected to the power module 6 and the hydraulic module 7. The controller 8 is configured to output commands to the power module 6 and / or the hydraulic module 7 to control the operation of at least one of the drive assembly 3, the steering assembly 4, and the suspension assembly 5.

[0128] The controller 8 controls various modules of the chassis platform, including but not limited to the power module 6 and hydraulic module 7 mentioned above. For example, the controller 8 can control the output parameters of the power module 6 and hydraulic module 7 according to the real-time operating requirements of the wheeled transport machinery, thereby coordinating the control of the drive component 3, steering component 4 and suspension component 5 in the electric drive module, realizing motion control during the operation of the wheeled transport machinery and improving the maneuverability of the wheeled transport machinery.

[0129] Furthermore, to more clearly illustrate the selection and layout methods of the number of electric drive modules in practical applications, the design process of the chassis platform for mining trucks of different tonnages will be used as an example.

[0130] Based on a mining truck with a chassis platform featuring a 4×4 distributed electric drive structure, this truck is equipped with a cargo box and a lifting system to realize its material transportation function. Here, 4×4 refers to the fact that the mining truck has four wheels, with an electric drive module located at each wheel.

[0131] To increase the load-bearing and transport capacity of this mining truck, two or more sets of electric drive modules can be added to form a 6×6 distributed electric drive chassis platform (see Figure 6), an 8×8 distributed electric drive chassis platform (see Figure 7), or a 10×10 distributed electric drive chassis platform. Simultaneously increasing the cargo box volume will improve the load-bearing and transport capacity. For example, assuming the load-bearing capacity of a single electric drive module is 15t, a 4×4 chassis platform can carry 60t, a 6×6 chassis platform can carry 90t, an 8×8 chassis platform can carry 120t, and a 10×10 chassis platform can carry 150t. Different tonnage chassis use the same electric drive modules, making parts interchangeable.

[0132] Of course, the load capacity of a single electric drive module is not limited to the aforementioned 15t. It can also be designed to other tonnages such as 10t, 20t, and 30t to meet the needs of a series of chassis platforms and mining trucks with different load capacities.

[0133] It is understandable that if a chassis platform with a multi-wheel drive structure does not require four-wheel or all-wheel drive, the components of the electric drive module mentioned above can be reduced or downgraded accordingly. For example, components such as motor 31, drive shaft 32, or reducer 33 can be removed to form a 4×2 chassis platform with a two-wheel drive structure. Here, 4×2 means that the chassis platform has four wheels, but only two electric drive modules with driving capabilities are used to drive two of those wheels.

[0134] Alternatively, in practical applications, other combinations can be designed to enable wheeled transport machinery to travel in both forward and backward directions while ensuring corresponding transport and load-bearing capacity.

[0135] In this embodiment, the power module 6, hydraulic module 7, and controller 8 can be disposed between two opposing support beams 11 of the frame 1. Different modules can be separated by additional support beams 11 or by anti-torsion pipes 12, depending on the spatial layout requirements of the chassis platform. Specific layouts can be referred to in Figures 5 to 7.

[0136] A third aspect of this disclosure provides a wheeled transport vehicle, which includes the aforementioned electric drive module or chassis platform. The wheeled transport vehicle provided in the embodiments of this disclosure includes transport machinery, and more particularly includes heavy-duty transport machinery.

[0137] The positive technical effects of the electric drive module or chassis platform in the above embodiments are also applicable to wheeled transport machinery, and will not be elaborated here.

[0138] The above provides a detailed description of an electric drive module, chassis platform, and wheeled transport machinery provided by this disclosure. 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 methods 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 module for a chassis platform of wheeled transport machinery, the chassis platform comprising a frame (1) and at least one pair of identical electric drive modules connected to the frame (1), wherein, Each of the electric drive modules is configured to independently drive one wheel (2) of the wheeled transport machinery, and each includes: A drive assembly (3) is configured to connect between the frame (1) and the wheel (2) to drive the wheel (2) to rotate; A steering assembly (4), configured to connect between the frame (1) and the wheel (2) to drive the wheel (2) to steer; and A suspension assembly (5) is configured to connect the vehicle frame (1) and the steering assembly.

2. The electric drive module for the chassis platform of wheeled transport machinery according to claim 1, wherein, The drive assembly (3) is symmetrical about the radial section of the wheel (2); and / or The suspension assembly (5) is symmetrical about the radial section of the wheel (2).

3. The electric drive module for the chassis platform of wheeled transport machinery according to claim 1 or 2, wherein, The steering assembly (4) includes a steering knuckle (41) which is symmetrical about the radial section of the wheel (2) and is fixedly connected to the wheel (2).

4. The electric drive module for the chassis platform of wheeled transport machinery according to claim 3, wherein, The steering assembly (4) further includes a steering mechanism movably connected between the frame (1) and the steering knuckle (41).

5. The electric drive module for the chassis platform of wheeled transport machinery according to claim 4, wherein, The steering mechanism includes a steering knuckle arm (42) and a steering cylinder (43). The steering knuckle arm (42) is fixedly connected to the steering knuckle (41), and the two ends of the steering cylinder (43) are respectively hinged to the steering knuckle arm (42) and the vehicle frame (1).

6. The electric drive module for the chassis platform of wheeled transport machinery according to any one of claims 3 to 5, wherein, The suspension assembly (5) is hinged to the steering knuckle (41).

7. The electric drive module for a chassis platform of wheeled transport machinery according to any one of claims 3 to 6, wherein, The suspension assembly (5) includes a suspension cylinder (51), the two ends of which are hinged to the vehicle frame (1) and the steering knuckle (41), respectively.

8. The electric drive module for the chassis platform of wheeled transport machinery according to any one of claims 3 to 7, wherein, The suspension assembly (5) includes a first wishbone (52), and the steering knuckle (41) is provided with a first hinge portion (411). The two ends of the first wishbone (52) are respectively hinged to the vehicle frame (1) and the first hinge portion (411).

9. The electric drive module for the chassis platform of wheeled transport machinery according to claim 8, wherein, The suspension assembly (5) further includes a second wishbone (53), and the steering knuckle (41) is provided with a second hinge portion (412) that is vertically spaced from the first hinge portion (411). The two ends of the second wishbone (53) are respectively hinged to the vehicle frame (1) and the second hinge portion (412).

10. The electric drive module for the chassis platform of wheeled transport machinery according to claim 9, wherein, The first fork arm (52) is ball-jointed to the first hinge (411); and / or The second fork arm (53) is ball-jointed with the second hinge part (412).

11. The electric drive module for a chassis platform of wheeled transport machinery according to any one of claims 3 to 10, wherein, The drive assembly (3) includes a motor (31) and a drive shaft (32). The motor (31) is installed inside the frame (1), and the two ends of the drive shaft (32) are connected to the motor (31) and the wheel (2) respectively.

12. The electric drive module for the chassis platform of wheeled transport machinery according to claim 11, wherein, The frame (1) includes a support beam (11) and an anti-torsion tube (12) connected to the support beam (11), and the motor (31) is installed in the anti-torsion tube (12).

13. The electric drive module for a chassis platform of wheeled transport machinery according to claim 11 or 12, wherein, The steering knuckle (41) is provided with a through hole (415) extending along the axial direction of the wheel (2), and the drive shaft (32) passes through the through hole (415).

14. The electric drive module for a chassis platform of wheeled transport machinery according to any one of claims 11 to 13, wherein, The drive assembly (3) also includes a speed reducer (33) connected between the drive shaft (32) and the wheel (2).

15. The electric drive module for the chassis platform of wheeled transport machinery according to claim 14, wherein, The speed reducer (33) includes a spur gear speed reducer.

16. The electric drive module for a chassis platform of wheeled transport machinery according to claim 14 or 15, wherein, The drive assembly (3) also includes a braking device, which is integrated on the reducer (33).

17. The electric drive module for a chassis platform of wheeled transport machinery according to any one of claims 1 to 16, wherein, The drive assembly (3) is removably connected to both the frame (1) and the wheels (2); and / or The steering assembly (4) is removably connected to both the frame (1) and the wheel (2); and / or The suspension assembly (5) is removably connected to the vehicle frame (1).

18. A chassis platform for wheeled transport machinery, the chassis platform comprising at least one pair of electric drive modules for the chassis platform of wheeled transport machinery as claimed in any one of claims 1 to 17, each of the electric drive modules being configured to independently drive one wheel of the wheeled transport machinery.

19. The chassis platform for wheeled transport machinery according to claim 18, wherein, The chassis platform also includes a power module (6) and a hydraulic module (7), the power module (6) being configured to provide electrical power to the drive assembly (3), and the hydraulic module (7) being configured to provide hydraulic power to the steering assembly (4) and / or the suspension assembly (5).

20. The chassis platform for wheeled transport machinery according to claim 19, wherein, The chassis platform also includes a controller (8) that is signal-connected to the power module (6) and the hydraulic module (7). The controller (8) is configured to output commands to the power module (6) and / or the hydraulic module (7) to control the operation of at least one of the drive assembly (3), the steering assembly (4), and the suspension assembly (5).

21. A wheeled transport machine, comprising an electric drive module for a chassis platform for a wheeled transport machine as claimed in any one of claims 1 to 17, or comprising a chassis platform for a wheeled transport machine as claimed in any one of claims 18 to 20.

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