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 wherein the electric drive module is for a chassis platform of a wheeled transport machine, the chassis platform comprising a frame and at least one pair of identical electric drive modules connected to the frame, each electric drive module configured to independently drive one wheel of the wheeled transport machine, each electric driving module comprises a driving assembly, a steering assembly and a suspension assembly, and the driving assemblies are constructed to be connected between the frame and the wheels so as to drive the wheels to rotate; the steering assembly is configured to be connected between the frame and the wheels so as to drive the wheels to steer; 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 driving modules. The wheel type transportation machine comprises the electric driving module or the chassis platform.

Description

Technical Field

[0001] The present disclosure relates to the technical field of engineering machinery, and in particular to an electric drive module, a chassis platform and a wheeled transport machinery. Background Art

[0002] Wheeled transport machinery in related technologies, such as off-road wide-body dump trucks and mining dump trucks, usually face the problem of poor versatility of powertrain 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 need to select engines of corresponding power according to carrying capacity, but also need to be equipped with motors of corresponding torque and suitable axles. This not only increases the production, procurement and management costs of parts for equipment manufacturers, but also increases the manufacturing cost of products. In addition, the spare parts management and maintenance costs faced by users during use also increase accordingly.

[0003] It should be noted that the information disclosed in the background technology section of the present disclosure is only intended to increase the understanding of the overall background of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes prior art already known to those skilled in the art. Summary of the invention

[0004] The present disclosure provides an electric drive module, a chassis platform and a wheeled transport machine, which realize a modular design of a drive system of the transport machine.

[0005] A first aspect of the present disclosure provides an electric drive module for a chassis platform of a wheeled transport machine, the chassis platform comprising 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 machine and each comprises:

[0006] A drive assembly is configured to be connected between the vehicle frame and the wheels to drive the wheels to rotate;

[0007] A steering assembly configured to be connected between the vehicle frame and the wheels to drive the wheels to steer; and

[0008] The suspension assembly is configured to be connected between the vehicle frame and the steering assembly.

[0009] In some embodiments, the drive assembly is symmetrical about a radial cross-section of the wheel; and / or the suspension assembly is symmetrical about a radial cross-section of the wheel.

[0010] In some embodiments, the steering assembly includes a steering knuckle, the steering knuckle is symmetrical with respect to a radial cross section of the wheel, and the steering knuckle is fixedly connected to the wheel.

[0011] In some embodiments, the steering assembly further includes a steering mechanism movably connected between the vehicle frame and the steering knuckle.

[0012] In some embodiments, the steering mechanism includes a steering knuckle arm and a steering cylinder, the steering knuckle arm is fixedly connected to the steering knuckle, and two ends of the steering cylinder are respectively hinged to the steering knuckle arm and the frame.

[0013] In some embodiments, the suspension assembly is articulated with the steering knuckle.

[0014] In some embodiments, the suspension assembly includes a suspension cylinder, and two ends of the suspension cylinder are respectively hinged to the frame and the steering knuckle.

[0015] In some embodiments, the suspension assembly includes a first fork arm, a first hinge portion is provided on the steering knuckle, and two ends of the first fork arm are respectively hinged to the vehicle frame and the first hinge portion.

[0016] In some embodiments, the suspension assembly further includes a second fork arm, the steering knuckle is provided with a second hinge portion spaced apart from the first hinge portion in a vertical direction, and two ends of the second fork arm are respectively hinged to the frame and the second hinge portion.

[0017] In some embodiments, the first fork arm is connected to the first hinge portion by a ball joint; and / or the second fork arm is connected to the second hinge portion by a ball joint.

[0018] In some embodiments, the driving assembly includes a motor and a transmission shaft, the motor is installed in the frame, and two ends of the transmission shaft are respectively connected to the motor and the wheel.

[0019] In some embodiments, the frame includes a support beam and a torsion tube connected to the support beam, and the motor is installed in the torsion tube.

[0020] In some embodiments, the steering knuckle is provided with a through hole extending along the axial direction of the wheel, and the transmission shaft passes through the through hole.

[0021] In some embodiments, the driving assembly further includes a reducer connected between the transmission shaft and the wheels.

[0022] In some embodiments, the speed reducer comprises a spur gear speed reducer.

[0023] In some embodiments, the driving assembly further includes a braking device, which is integrated on the reducer.

[0024] In some embodiments, the drive assembly is removably connected to both the frame and the wheels; and / or the steering assembly is removably connected to both the frame and the wheels; and / or the suspension assembly is removably connected to the frame.

[0025] A second aspect of the present disclosure provides a chassis platform for a wheeled transport machine, the chassis platform for a wheeled transport machine comprising at least one pair of electric drive modules of the above-mentioned chassis platform for a wheeled transport machine, each electric drive module being configured to independently drive a wheel of the wheeled transport machine.

[0026] In some embodiments, the chassis platform further includes a power module and a hydraulic module, wherein the power module is configured to provide electrical energy to the drive assembly, and the hydraulic module is configured to provide hydraulic energy to the steering assembly and / or the suspension assembly.

[0027] In some embodiments, the chassis platform also includes a controller, which is signal-connected to the power module and the hydraulic module, and the controller is configured to output instructions to the power module and / or the hydraulic module to control the action of at least one of the drive component, the steering component, and the suspension component.

[0028] A third aspect of the present disclosure provides a wheeled transport machine, comprising the above-mentioned electric drive module for the chassis platform of the wheeled transport machine, or comprising the above-mentioned chassis platform for the wheeled transport machine.

[0029] Based on the above technical solution, the present invention provides an electric drive module to independently drive the wheels, wherein the electric drive module integrates the driving, steering and suspension functions. On the one hand, it can reduce the number of components that need to be assembled separately, simplify the production and assembly processes, 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 a shock absorption function at each wheel, which helps to improve the overall controllability and operating stability of the wheeled transport machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0031] Figure 1 A schematic structural diagram of an embodiment of a wheeled transport machine provided by the present disclosure is shown.

[0032] Figure 2 A schematic structural diagram of an embodiment of an electric drive module provided by the present disclosure is shown.

[0033] Figure 3 A partial cross-sectional view of an embodiment of an electric drive module provided by the present disclosure is shown.

[0034] Figure 4 A schematic diagram showing a symmetrical arrangement of a drive assembly and a suspension assembly about wheels in one embodiment of an electric drive module provided by the present disclosure is shown.

[0035] Figure 5 A structural schematic diagram of an embodiment of a chassis platform provided by the present disclosure is shown.

[0036] Figure 6 A structural schematic diagram of another embodiment of the chassis platform provided by the present disclosure is shown.

[0037] Figure 7 A structural schematic diagram of another embodiment of the chassis platform provided by the present disclosure is shown.

[0038] In the figure:

[0039] 1. Frame; 11. Support beam; 12. Torsion tube;

[0040] 2. Wheels;

[0041] 3. Driving assembly; 31. Motor; 32. Transmission shaft; 33. Reducer;

[0042] 4. Steering assembly; 41. Steering knuckle; 411. First hinge; 412. Second hinge; 413. First ball head; 414. Second ball head; 415. Through hole; 42. Steering knuckle arm; 43. Steering cylinder; 44. Steering pin shaft;

[0043] 5. Suspension assembly; 51. Suspension cylinder; 52. First fork arm; 521. First ball seat; 522. First support arm; 53. Second fork arm; 531. Second ball seat; 532. Second support arm;

[0044] 6. Power module; 7. Hydraulic module; 8. Controller; 9. Cargo box. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0046] In the description of the present disclosure, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present disclosure.

[0047] In the related art, the chassis system of wheeled transport machinery has the disadvantages of poor versatility of key components and high maintenance cost. For example, wheeled transport machinery of different types / tonnages usually requires steering axles, drive axles, gearboxes, suspension cylinders, connecting rod guide mechanisms and other parts of different specifications, which greatly increases the development and manufacturing costs of wheeled transport machinery parts and is not convenient for users to use and maintain these parts.

[0048] In order to solve at least some of the problems mentioned above, the present invention discloses a modular design for the drive system of the wheeled transport machinery, thereby facilitating meeting the drive requirements of wheeled transport machinery of different types / tonns by configuring different numbers of drive modules and / or by adaptively arranging multiple drive modules.

[0049] Figure 1 A schematic diagram of a wheeled transport machine is shown. A first aspect of the present 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 a pair of identical electric drive modules connected to the frame 1. Each electric drive module is configured to independently drive a 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 be connected between the frame 1 and the wheel 2 to drive the wheel 2 to rotate. The steering assembly 4 is configured to be connected between the frame 1 and the wheel 2 to drive the wheel 2 to steer. The suspension assembly 5 is configured to be connected between the frame 1 and the steering assembly.

[0050] Here, the driving assembly 3 drives the wheels 2 to realize the forward and backward movement of the wheeled transport machinery; the steering assembly 4 drives the wheels 2 to realize the left and right steering of the wheeled transport machinery; the suspension assembly 5 is connected between the frame 1 and the steering assembly to at least provide a shock absorbing function for the frame 1, especially when driving on rugged or uneven ground.

[0051] In the disclosed embodiment, each electric drive module independently drives a wheel 2, so that the electric drive module can effectively control the individual rotation and steering of the wheel 2 it drives, and can provide a shock absorption function at each wheel 2, which helps to improve the overall controllability and operating stability of the wheeled transport machinery.

[0052] The electric drive module provided in the embodiment of the present disclosure integrates the driving, steering and suspension functions, which helps to simplify the design of the vehicle chassis. Unlike the related art in which the above-mentioned functional components are arranged separately, the integrated electric drive module in the present disclosure can reduce the number of components that need to be assembled separately, thereby simplifying the production and assembly process and reducing the complexity of maintenance and repair.

[0053] When faced with the load-bearing requirements of wheeled transport machinery of different tonnages, the disclosed embodiments can combine electric drive modules in different quantities to form a series of chassis platforms suitable for wheeled transport machinery of different tonnages, effectively shortening the research and development cycle of new products.

[0054] refer to Figure 4 As shown, in some embodiments, the drive assembly 3 is symmetrical with respect to the radial cross section of the wheel 2. The suspension assembly 5 is symmetrical with respect to the radial cross section of the wheel 2.

[0055] Specifically, the symmetrical arrangement in the present disclosure is different from the chassis design in the related art. In the related art, the chassis transmission gears, thrust rods and other components are designed with a main load-bearing direction, which can bear a higher load when moving forward and a weaker load when moving backward, so that the chassis structure of the related art is designed differently in the forward direction and the backward direction, which is an asymmetric structural design.

[0056] In the disclosed embodiment, by arranging the drive assembly 3 and / or the suspension assembly 5 to be symmetrical about the radial cross-section of the wheel 2, the load on the drive assembly 3 and the suspension assembly 5 in the front-to-rear direction is evenly distributed during the forward and reverse travel of the wheeled transport machinery, thereby improving the efficiency of braking energy recovery and reducing the asymmetric wear problem caused when traveling in different directions, thereby extending the service life of components such as the drive assembly 3, the suspension assembly 5, and the wheel 2.

[0057] Here, the suspension assembly 5 and the steering knuckle 41 are symmetrical about the radial section of the wheel 2, especially when the wheeled transport machinery is in a state where the frame 1 is horizontal and the direction of the wheel 2 is consistent with the direction of movement of the frame 1. At this time, the radial section refers to the radial section of the wheel 2 extending along the gravity direction. It can be understood that during the driving process of the wheeled transport machinery, due to changes in the driving direction, road conditions, etc., the relative positions of some structures of the drive assembly 3 and the suspension assembly 5 with respect to the wheel 2 will change dynamically, but the projection of the connection position of the drive assembly 3 and the suspension assembly 5 with the wheel 2 on the radial plane of the wheel 2 always remains coincident with the center of the wheel 2. This arrangement allows 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 to pass through their geometric centers, thereby helping to ensure the uniformity of the forces at different positions on the above-mentioned components.

[0058] refer to Figure 2 As shown, 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 can be fixedly connected to the rim of the wheel 2.

[0059] refer to Figure 2As shown, in some embodiments, the steering assembly 4 further includes a steering mechanism, which is movably connected between the frame 1 and the steering knuckle 41. Based on this, the relative position of the wheel 2 relative to the frame 1 can change, thereby achieving the steering of the wheel 2.

[0060] refer to Figure 2 As shown, 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 both ends of the steering cylinder 43 are hinged to the steering knuckle arm 42 and the frame 1 respectively.

[0061] 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 the steering of the wheel 2 .

[0062] refer to Figure 2 As shown, in some examples, the steering mechanism further includes a steering pin 44 , which is used to connect the steering cylinder 43 and the frame 1 , and the steering cylinder 43 and the frame 1 are configured to be able to rotate relative to the steering pin 44 .

[0063] In some embodiments, the suspension assembly 5 is hinged to the steering knuckle 41 .

[0064] The suspension assembly 5 and the steering knuckle 41 are hinged so that the suspension assembly 5 and the steering knuckle 41 can rotate relative to each other, so as to adapt to the relative position change between the frame 1 and the wheel 2 during the movement of the wheeled transport machine, thereby improving the load-bearing capacity of the frame 1 and the load-bearing device (for example, Figure 1 The cargo box 9) shown has stability during the operation of the wheeled transport machine.

[0065] refer to Figure 2 As shown, in some embodiments, the suspension assembly 5 includes a suspension cylinder 51. Both ends of the suspension cylinder 51 are hinged to the vehicle frame 1 and the steering knuckle 41 respectively.

[0066] Based on this, the relative position change between the frame 1 and the steering knuckle 41, that is, the relative position change between the frame 1 and the wheel 2 can be achieved through the extension and shortening of the suspension cylinder 51, which helps to absorb the vibration caused by uneven road surface during the operation of the wheeled transport machinery, provide buffering, and improve the overall stability of the transport machinery.

[0067] In one example, the suspension cylinders 51 are arranged substantially along the Z direction to improve the anti-vibration performance of the frame 1 in the Z direction. The Z direction may be, for example, a vertical direction.

[0068] refer to Figure 2As shown, in some embodiments, the suspension assembly 5 includes a first fork arm 52. A first hinge portion 411 is provided on the steering knuckle 41, and two ends of the first fork arm 52 are hinged to the vehicle frame 1 and the first hinge portion 411 respectively.

[0069] As an example, the first fork arm 52 includes two first arms 522 spaced apart in a substantially X direction, and the two first arms 522 are both hinged to the vehicle frame 1, for example, connected to the vehicle frame 1 by a rotatable pin. The two first arms 522 can disperse the impact force from the wheel 2, avoiding the stress concentration problem on the vehicle frame 1 caused by a single-point connection. The X direction can be, for example, a horizontal direction or a longitudinal direction of the chassis platform.

[0070] In a specific example, the first fork arm 52 connects the frame 1 and the first hinge portion 411 along a substantially Y direction. The Y direction may be, for example, a direction perpendicular to the X and Z directions or a lateral direction of the chassis platform.

[0071] refer to Figure 2 As shown, in some embodiments, the suspension assembly 5 further includes a second fork arm 53. The knuckle 41 is provided with a second hinge portion 412 spaced apart from the first hinge portion 411 in the Z direction or the vertical direction, and the two ends of the second fork arm 53 are respectively hinged to the frame 1 and the second hinge portion 412.

[0072] As an example, the second fork arm 53 includes two second arms 532 spaced apart in the X direction, and the two second arms 532 are both hinged to the frame 1, for example, connected to the frame 1 through a rotatable pin. The two second arms 532 can disperse the impact force from the wheel 2, avoiding the stress concentration problem on the frame 1 caused by a single-point connection.

[0073] In a specific example, the second fork arm 53 connects the frame 1 and the second hinge portion 412 substantially in the Y direction.

[0074] In some embodiments where the suspension assembly 5 includes a first fork arm 52 and a second fork arm 53, the first fork arm 52 and the second fork arm 53 together form a double fork arm suspension structure. Compared with a single fork arm suspension structure, the double fork arm suspension structure can more effectively buffer ground impact force, reduce vibration of the frame 1, and bring better driving stability to the wheeled transport machine.

[0075] In the above embodiment, two arms spaced apart in the X direction are provided on the fork arm and hinged to the frame 1, so that the frame 1 can swing in the Z direction relative to the wheel 2, thereby buffering the impact force on the frame 1 in the Z direction, such as the impact force caused by uneven road surface.

[0076] refer to Figure 2As shown, as an example, in the Z direction, the first fork arm 52 is arranged above the second fork arm 53.

[0077] In some embodiments, the first fork arm 52 is connected to the first hinge portion 411 by a ball joint, and the second fork arm 53 is connected to the second hinge portion 412 by a ball joint.

[0078] The ball joint connection can provide a large range of rotation, so that there is sufficient freedom of movement and flexibility between the first fork arm 52 and the steering knuckle 41, and / or between the second fork arm 53 and the steering knuckle 41, so as to adapt to complex environments or road conditions. Especially when a wheeled transport machinery encounters rough road conditions, the impact caused by it usually acts on the wheel 2 in multiple directions. The ball joint connection can better adapt to these multi-directional impact forces, so that the suspension assembly 5 can better buffer the impact force, which helps to improve the overall movement stability of the wheeled transport machinery. In addition, the spherical matching structure of the ball joint connection helps to reduce the impact and wear on the related components of the suspension assembly 5 and the steering assembly 4, and extend their service life.

[0079] Specifically, in some embodiments, reference Figure 3 As shown, the steering knuckle 41 is provided with a first ball head 413 and a second ball head 414, the first fork arm 52 is provided with a first ball seat 521 that matches the first ball head 413, and the second fork arm 53 is provided with a second ball seat 531 that matches the second ball head 414. The first ball seat 521 is sleeved on the outer periphery of the first ball head 413, and the first ball seat 521 and the first ball head 413 are configured to be able to rotate relative to each other. The second ball seat 531 is sleeved on the outer periphery of the second ball head 414, and the second ball seat 531 and the second ball head 414 are configured to be able to rotate relative to each other.

[0080] In some embodiments where the suspension assembly 5 includes a suspension cylinder 51 , a first fork arm 52 , and a second fork arm 53 , the first fork arm 52 is disposed above the second fork arm 53 , and the suspension cylinder 51 is hinged to a first ball seat 521 of the first fork arm 52 .

[0081] 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, meeting the driving activity and stability requirements of the wheeled transport machinery.

[0082] refer to Figure 2 As shown, in some embodiments, the driving assembly 3 includes a motor 31 and a transmission shaft 32. The motor 31 is installed in the frame 1, and both ends of the transmission shaft 32 are connected to the motor 31 and the wheel 2 respectively.

[0083] Based on this, the transmission shaft 32 can transmit the torque output by the motor 31 to the wheel 2 to drive the wheel 2.

[0084] Among them, installing the motor 31 in the frame 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, rain, 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.

[0085] As an example, a mounting seat is provided in the frame 1 , and the motor 31 is mounted on the mounting seat.

[0086] refer to Figure 1 As shown, in some embodiments, the frame 1 includes a support beam 11 and a torsion tube 12 connected to the support beam 11 , and the motor 31 is installed in the torsion tube 12 .

[0087] As a sprung component, the torsion tube 12 is less susceptible to road impact and vibration, has a low failure rate, and can provide a sufficiently strong housing protection for the motor 31, thereby improving the reliability of the drive assembly 3.

[0088] As an example, the torsion tube 12 may be configured as a round tube, a U-shaped tube, or a polygonal tube having a cavity, and the cavity is used to accommodate the motor 31 .

[0089] refer to Figure 3 As shown, in some embodiments, the steering knuckle 41 is provided with a through hole 415 extending along the axial direction of the wheel 2 , and the transmission shaft 32 passes through the through hole 415 .

[0090] A through hole 415 is provided on the steering knuckle 41, so that the transmission shaft 32 can directly pass through the steering knuckle 41 and transmit power to the wheel 2, avoiding the need to provide an additional mounting structure or power transmission structure. On the one hand, it can improve the power transmission efficiency, and on the other hand, it can effectively reduce the space occupied by components, thereby realizing a compact layout of the electric drive module as a whole.

[0091] refer to Figure 1 and Figure 2 As shown, in some embodiments, the drive assembly 3 further includes a reducer 33. The reducer 33 is connected between the transmission shaft 32 and the wheel 2. As an example, one end of the transmission shaft 32 away from the motor 31 passes through the through hole 415 and is connected to the input flange of the reducer 33.

[0092] The reducer 33 is matched with the characteristic setting of the motor 31, and can convert the output speed and torque (e.g., high speed and low torque) of the motor 31 into the output speed and torque (e.g., low speed and high torque) suitable for driving the wheels 2, thereby achieving effective matching of the drive component 3 with the operating conditions of the wheeled transport machinery.

[0093] In addition, compared with the related art using a gearbox for transmission, the reducer 33 has the characteristics of simple structure, small size, low mechanical loss, etc., which helps to reduce the use and maintenance costs of the drive component 3.

[0094] In some embodiments, the motor 31, the transmission shaft 32 and the reducer 33 are designed based on the driving requirements in the forward and reverse directions, so that the loads of the wheels 2 and the above-mentioned related components remain consistent during the forward and reverse driving of the wheeled transport machinery. Different from the situation in the related art where the structural limitations of the drive axle, the main reducer and other components lead to the inability to brake at full power, thus affecting the recovery efficiency, the motor 31, the transmission shaft 32 and the reducer 33 provided in the embodiment of the present disclosure are designed based on the driving requirements in the forward and reverse directions, for example, they are designed to be symmetrical with respect to the wheel 2, so that the loads of these components are consistent during the forward and reverse driving, which helps to improve the energy recovery efficiency and the operating life of the wheeled transport machinery in the forward and reverse directions.

[0095] Specifically, in some examples, the reducer 33 includes a spur gear reducer.

[0096] The meshing characteristics of the spur gears are consistent in forward and reverse rotation, so that the stability of the power transmission of the spur gear reducer will not change due to the change of the driving direction (forward or backward). Therefore, the wheel 2 can obtain the same dynamic characteristics under the forward and backward working conditions of the wheeled transport machinery, thereby reducing the problem of unbalanced wear of related components caused by load differences under different working conditions.

[0097] In some embodiments, the driving assembly 3 further includes a braking device, which is integrated on the reducer 33 .

[0098] Integrating the brake device on the reducer 33 can improve the braking efficiency and the overall compactness of the drive assembly, which helps to achieve a miniaturized design of the electric drive module. In addition, in the electric drive module, the integration of the brake device and the reducer 33 helps to optimize the energy recovery process of the motor, and can improve the energy efficiency of the entire vehicle by achieving a dynamic distribution of the braking force and the energy recovery efficiency.

[0099] The specific form and structure of the braking device can be selected based on the structure of the reducer 33, the braking requirements of the wheeled sports machine, etc.

[0100] For example, in some examples, the braking device includes a wet brake, and in particular, includes a running-integrated wet brake.

[0101] In some embodiments, the hydraulic module is used to provide hydraulic energy for the wet brake. In some specific examples, the brake device can share the hydraulic module with the hydraulic components (such as the steering cylinder 43) in the steering assembly 4, thereby facilitating a compact design of the electric drive device.

[0102] In some embodiments, reference Figure 1 and Figure 2 As shown, the integrated brake device and reducer 33 can be arranged radially inside the rim of the wheel 2, further saving installation space and realizing integrated arrangement.

[0103] As an example, the output end of the speed reducer 33 is fixedly connected to the rim of the wheel 2 .

[0104] 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.

[0105] The removable connection design allows the various components of the electric drive module, such as the drive, steering, suspension, etc., to be independently disassembled and replaced, and also helps to install and disassemble the electric drive module as a whole relative to the chassis platform of the wheeled transport machinery, facilitating regular maintenance and servicing.

[0106] Specifically, when a fault that is difficult to resolve in the short term occurs in the electric drive module during operation, the removable connection design can quickly remove the faulty component (such as the drive component 3, the steering component 4 or the suspension component 5), quickly replace the electric drive module or related faulty components, and avoid long-term shutdown of the wheeled transport machinery.

[0107] Here, the present disclosure does not limit the specific form of the removable connection. For example, various detachable connection methods such as pin connection, bolt connection, etc. can be selected according to actual conditions.

[0108] As an example, the motor 31 of the drive assembly 3 is detachably mounted on a mounting seat in the frame 1, the output flange of the motor 31 is connected to the transmission 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.

[0109] As an example, the steering cylinder 43 of the steering assembly 4 is connected to the vehicle frame 1 via a steering pin 44 , and the steering cylinder 43 may also be connected to the steering knuckle 41 via a pin.

[0110] As an example, the suspension cylinder 51 of the suspension assembly 5 is connected to the vehicle frame 1 via a pin, and the first fork arm 52 and the second fork arm 53 of the suspension assembly 5 are both connected to the vehicle frame 1 via a pin.

[0111] A second aspect of the present disclosure provides a chassis platform for a wheeled transport machine, the chassis platform comprising at least one pair of the above-mentioned electric drive modules, each of the electric drive modules being configured to independently drive one wheel of the wheeled transport machine.

[0112] Since each wheel is driven by an independent electric drive module, the wheeled transport machine can be customized in various working environments. For example, the distribution of driving force or the steering angle of different wheels can be adjusted as needed to adapt to different work tasks, such as traction, handling, transportation, etc.

[0113] Furthermore, the electric drive module can be flexibly applied to chassis platforms of different types of wheeled transport machinery. Specifically, the number and position of the electric drive modules can be adaptively arranged on the chassis platform according to the type, specification or load requirements of the wheeled transport machinery.

[0114] For example, two, four, six or eight electric drive modules are arranged, or a pair of electric drive modules are arranged on the front wheels or rear wheels of a wheeled transport machinery, or a certain number of electric drive modules are distributed relative to the entire chassis platform to independently drive different numbers of wheels 2 or wheels in different positions to meet different transportation needs.

[0115] In order to more clearly explain the way of designing the electric drive module in practical applications, an explanation is given here based on a specific embodiment in which the wheeled transport machine is set as a mining vehicle.

[0116] In this specific embodiment, when facing the load-bearing requirements of mining vehicles of different tonnages, different numbers of electric drive modules can be combined to form a series of chassis platforms suitable for mining vehicles of different tonnages, effectively shortening the research and development cycle of new products. Among them, the main components in the electric drive module (such as motors, reducers, suspension cylinders, steering cylinders, etc.) can adopt unified specifications and interface sizes, thereby reducing the development cost and manufacturing cost of these components, greatly streamlining the inventory and spare parts management of manufacturers and users, and improving the maintenance efficiency of related products.

[0117] refer to Figure 5 As shown, 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 energy to the drive assembly 3. The hydraulic module 7 is configured to provide hydraulic energy to the steering assembly 4 and / or the suspension assembly 5.

[0118] The power module 6 and the hydraulic module 7 are configured as independent modules, so that each module can be maintained and managed independently, thereby reducing maintenance time and maintenance costs.

[0119] Each electric drive module may be equipped with a separate power module 6 or hydraulic module 7 to realize energy supply. Alternatively, the chassis platform may be provided with only one power module 6 or one hydraulic module 7, and then all the electric drive modules are separately powered.

[0120] refer to Figure 5As shown, in some embodiments, the chassis platform also includes a controller 8, which is signal-connected to the power module 6 and the hydraulic module 7, and the controller 8 is configured to output instructions to the power module 6 and / or the hydraulic module 7 to control the action of at least one of the drive component 3, the steering component 4 and the suspension component 5.

[0121] The controller 8 controls various modules of the chassis platform, not limited to the power module 6 and the hydraulic module 7 mentioned above. For example, the controller 8 can control the output parameters of the power module 6 and the hydraulic module 7 according to the real-time operation requirements of the wheeled transport machinery, thereby coordinating and controlling the drive component 3, the steering component 4 and the suspension component 5 in the electric drive module, realizing the motion control of the wheeled transport machinery during operation, and improving the maneuverability of the wheeled transport machinery.

[0122] Furthermore, in order to more clearly illustrate the number selection and layout method of the electric drive modules in practical applications, the design process of the chassis platform of a mining car of different tonnages is taken as an example to illustrate.

[0123] The design is based on a mine car with a chassis platform with a 4×4 distributed electric drive structure. The mine car is equipped with a cargo box and a lifting system to realize the material transportation function of the mine car. Here, 4×4 means that the mine car includes four wheels, and each wheel is equipped with an electric drive module.

[0124] If the carrying and transport capacity of the mine car needs to be improved, two or more electric drive modules can be added to form a 6×6 distributed electric drive chassis platform (refer to Figure 6 As shown), 8×8 distributed electric drive chassis platform (reference Figure 7 As shown in the figure, a 10×10 distributed electric drive chassis platform can be used, and the cargo box volume can be increased simultaneously to improve the carrying and transportation capacity. To give a specific example, assuming that the carrying capacity of a single electric drive module is 15t, the 4×4 chassis platform can carry 60t, the 6×6 chassis platform can carry 90t, the 8×8 chassis platform can carry 120t, and the 10×10 chassis platform can carry 150t. Chassis of different tonnages use exactly the same electric drive module, and parts are universal.

[0125] Of course, the carrying capacity of a single electric drive module is not limited to the above-mentioned 15t, and can also be designed to other tonnages such as 10t, 20t, 30t, etc. to meet the needs of a series of chassis platforms and mine cars with different tonnage carrying capacities.

[0126] It can be understood that if the chassis platform with a multi-wheel drive structure does not require four-wheel drive or all-wheel drive, the electric drive module mentioned above can be correspondingly reduced in parts and downgraded. For example, the motor 31, the transmission shaft 32 or the reducer 33 and other parts are removed to form a 4×2 chassis platform with a two-wheel drive structure. Here, 4×2 means that the chassis platform is arranged with four wheels, but only two electric drive modules with driving capabilities are used to drive two of the wheels.

[0127] Alternatively, in actual applications, other combinations may be designed to enable the wheeled transport machinery to travel in both forward and backward directions, while ensuring that it has the corresponding transport and carrying capacity.

[0128] In the embodiment of the present disclosure, the power module 6, the hydraulic module 7 and the controller 8 can be arranged between two oppositely arranged support beams 11 of the frame 1, wherein different modules can be separated by another support beam 11 or by a torsion tube 12 according to the spatial layout requirements of the chassis platform. Figure 5~Figure 7 Several layout methods.

[0129] A third aspect of the present disclosure provides a wheeled transport machine, the wheeled transport machine comprising the above-mentioned electric drive module or chassis platform. The wheeled transport machine provided by the embodiment of the present disclosure includes a transport machine, in particular, a heavy-load transport machine.

[0130] The positive technical effects of the electric drive module or chassis platform in the above-mentioned embodiments are also applicable to wheeled transport machinery and will not be elaborated here.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that without departing from the principles of the present disclosure, the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, and these modifications and equivalent replacements should be included in the scope of the technical solution for protection of the present disclosure.

Claims

1. An electric drive module for a chassis platform of a wheeled transport machine, characterized in that: The chassis platform comprises 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 machine and each comprises: A driving assembly (3), the driving assembly (3) being configured to be connected between the frame (1) and the wheel (2) so as to drive the wheel (2) to rotate; A steering assembly (4), the steering assembly (4) being configured to be connected between the vehicle frame (1) and the wheel (2) to drive the wheel (2) to steer; and A suspension assembly (5) is configured to be connected between the vehicle frame (1) and the steering assembly.

2. The electric drive module for the chassis platform of a wheeled transport machine according to claim 1, characterized in that: The drive assembly (3) is symmetrical about a radial cross section of the wheel (2); and / or The suspension assembly (5) is symmetrical with respect to a radial cross section of the wheel (2).

3. The electric drive module for the chassis platform of a wheeled transport machine according to claim 1, characterized in that: The steering assembly (4) comprises a steering knuckle (41), the steering knuckle (41) is symmetrical with respect to a radial cross section of the wheel (2), and the steering knuckle (41) is fixedly connected to the wheel (2).

4. The electric drive module for the chassis platform of a wheeled transport machine according to claim 3, characterized in that: The steering assembly (4) further comprises a steering mechanism, wherein the steering mechanism is movably connected between the vehicle frame (1) and the steering knuckle (41).

5. The electric drive module for the chassis platform of a wheeled transport machine according to claim 4, characterized in that: The steering mechanism comprises a steering knuckle arm (42) and a steering oil cylinder (43); the steering knuckle arm (42) is fixedly connected to the steering knuckle (41); and two ends of the steering oil 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 a wheeled transport machine according to claim 3, characterized in that: The suspension assembly (5) is hinged to the steering knuckle (41).

7. The electric drive module for the chassis platform of a wheeled transport machine according to claim 3, characterized in that: The suspension assembly (5) comprises a suspension cylinder (51), and two ends of the suspension cylinder (51) are respectively hinged to the vehicle frame (1) and the steering knuckle (41).

8. The electric drive module for the chassis platform of a wheeled transport machine according to claim 3, characterized in that: The suspension assembly (5) comprises a first fork arm (52), a first hinged portion (411) is provided on the steering knuckle (41), and two ends of the first fork arm (52) are respectively hinged to the vehicle frame (1) and the first hinged portion (411).

9. The electric drive module for the chassis platform of a wheeled transport machine according to claim 8, characterized in that: The suspension assembly (5) further comprises a second fork arm (53), the steering knuckle (41) being provided with a second hinged portion (412) spaced apart from the first hinged portion (411) in the vertical direction, and the two ends of the second fork arm (53) being respectively hinged to the vehicle frame (1) and the second hinged portion (412).

10. The electric drive module for the chassis platform of a wheeled transport machine according to claim 9, characterized in that: The first fork arm (52) is spherically connected to the first hinge portion (411); and / or The second fork arm (53) is connected to the second hinge portion (412) by a ball joint.

11. The electric drive module for a chassis platform of a wheeled transport machine according to any one of claims 3 to 10, characterized in that: The driving assembly (3) comprises a motor (31) and a transmission shaft (32); the motor (31) is mounted in the vehicle frame (1), and two ends of the transmission shaft (32) are respectively connected to the motor (31) and the wheel (2).

12. The electric drive module for the chassis platform of a wheeled transport machine according to claim 11, characterized in that: The vehicle frame (1) comprises 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 the chassis platform of a wheeled transport machine according to claim 11, characterized in that: The steering knuckle (41) is provided with a through hole (415) extending along the axial direction of the wheel (2), and the transmission shaft (32) is passed through the through hole (415).

14. The electric drive module for the chassis platform of a wheeled transport machine according to claim 11, characterized in that: The driving assembly (3) further comprises a reducer (33), wherein the reducer (33) is connected between the transmission shaft (32) and the wheel (2).

15. The electric drive module for the chassis platform of a wheeled transport machine according to claim 14, characterized in that: The reducer (33) comprises a spur gear reducer.

16. The electric drive module for the chassis platform of a wheeled transport machine according to claim 14, characterized in that: The drive assembly (3) further comprises a braking device, wherein the braking device is integrated on the reducer (33).

17. The electric drive module for a chassis platform of a wheeled transport machine according to any one of claims 1 to 10, characterized in that: 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 vehicle frame (1) and the wheel (2); and / or The suspension assembly (5) and the vehicle frame (1) are removably connected.

18. A chassis platform for a wheeled transport machine, characterized in that: The chassis platform comprises at least one pair of electric drive modules of the chassis platform for a wheeled transport machine according to any one of claims 1 to 17, each of the electric drive modules being configured to independently drive one wheel of the wheeled transport machine.

19. The chassis platform for a wheeled transport machine according to claim 18, characterized in that: The chassis platform further comprises a power module (6) and a hydraulic module (7), wherein the power module (6) is configured to provide electrical energy to the drive assembly (3), and the hydraulic module (7) is configured to provide hydraulic energy to the steering assembly (4) and / or the suspension assembly (5).

20. The chassis platform for a wheeled transport machine according to claim 19, characterized in that: The chassis platform further comprises a controller (8), wherein the controller (8) is connected to the power module (6) and the hydraulic module (7) by signals, and the controller (8) is configured to output instructions to the power module (6) and / or the hydraulic module (7) to control the action of at least one of the drive assembly (3), the steering assembly (4) and the suspension assembly (5).

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

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