A carrier with a differential steering wheel with double drive

Abstract

A carrier with a double drive differential steering wheel, the carrier comprising a vehicle body, a power battery, a controller and a fork arm arranged on the vehicle body, the bottom of the vehicle body is provided with a differential steering wheel, the differential steering wheel is electrically connected with the power battery and the controller, and is used for driving the vehicle body to travel; wherein the differential steering wheel comprises a first drive assembly, a second drive assembly and a mounting assembly, one side of the vehicle body away from the fork arm is formed with a mounting cavity, the mounting assembly is arranged in the mounting cavity, and the first drive assembly and the second drive assembly are arranged at two ends of the mounting assembly and are electrically connected with the controller and the power battery.

Description

Technical Field

[0001] This utility model relates to the field of freight vehicle technology, and in particular to a transport vehicle with dual-drive differential steering wheels. Background Technology

[0002] When transporting goods, pallet trucks are often used to replace manual labor in performing repetitive and tedious handling tasks, effectively improving handling efficiency and reducing labor costs. However, existing pallet trucks are generally quite large and mostly use complex steering and drive mechanisms. The drive mechanism usually drives the drive wheels on both sides to rotate synchronously through a single axle, while the steering mechanism is used to control the drive mechanism to rotate in place, thereby realizing the steering action of the pallet truck. This not only easily causes wear and tear on the wheels of the drive mechanism and the ground in contact with the wheels, but also easily causes the pallet truck to be unstable and even tip over, thus affecting the handling of goods. Utility Model Content

[0003] This invention provides a transport vehicle with dual-drive differential steering wheels, aiming to solve at least one of the technical problems existing in the prior art.

[0004] This utility model provides a transport vehicle with dual-drive differential steering wheels. The transport vehicle includes a vehicle body, a power battery, a controller, and a fork arm mounted on the vehicle body. A differential steering wheel is provided at the bottom of the vehicle body. The differential steering wheel is electrically connected to the power battery and the controller to drive the vehicle body to move.

[0005] The differential steering wheel includes a first drive assembly, a second drive assembly, and a mounting assembly. A mounting cavity is formed on the side of the vehicle body away from the fork arm. The mounting assembly is disposed in the mounting cavity. The first drive assembly and the second drive assembly are disposed at both ends of the mounting assembly and are electrically connected to the controller and the power battery.

[0006] In a transport vehicle according to one embodiment of the present invention, the differential steering wheel further includes a shock-absorbing component. One end of the mounting component is rotatably connected to one end of the first drive component and the second drive component, and the other end of the mounting component is rotatably connected to the other end of the first drive component and the second drive component through the shock-absorbing component.

[0007] In a transport vehicle according to one embodiment of the present invention, the mounting assembly includes a suspension bracket and a rotating shaft. One end of the suspension bracket extends downward to have a first connecting portion. The rotating shaft passes between the first driving assembly and the second driving assembly and is used to rotatably connect with the first driving assembly and the second driving assembly.

[0008] In a transport vehicle according to one embodiment of the present invention, the other end of the suspension bracket is provided with two second connecting parts facing away from the first connecting part, and each second connecting part is connected to the first driving assembly and the second driving assembly with a shock-absorbing component.

[0009] In a transport vehicle according to one embodiment of the present invention, the ratio of the shortest distance in the height direction between the suspension bracket and the first drive assembly or the second drive assembly to the outer diameter of the first tire or the second tire is in the range of 0.15 to 2.

[0010] In a transport vehicle according to one embodiment of the present invention, the shortest distance between the suspension bracket and the first drive assembly or the second drive assembly in the height direction is in the range of 20mm to 25mm.

[0011] In a transport vehicle according to one embodiment of the present invention, the mounting assembly further includes a fixing plate, which is disposed on the side of the suspension bracket away from the first drive assembly or the second drive assembly, and is used to connect to the vehicle body.

[0012] In a transport vehicle according to one embodiment of the present invention, the differential steering wheel further includes an encoder, the fixed plate has a groove structure, a first connecting rod is connected to the groove structure, a second connecting rod is provided at the connection position between the upper end surface of the fixed plate and the vehicle body, and the encoder is connected to the first connecting rod and the second connecting rod.

[0013] In a transport vehicle according to one embodiment of the present invention, the first drive motor includes a first radiator, a first rotor assembly, and a first stator assembly connected to a mounting assembly. The first rotor assembly is at least partially rotatably mounted within the first stator assembly, and the first radiator is mounted on the side of the first stator assembly facing the second drive motor; and / or,

[0014] The second drive motor includes a second heat sink, a second rotor assembly, and a second stator assembly connected to a mounting assembly. The second rotor assembly is at least partially rotatably mounted within the second stator assembly, and the second heat sink is mounted on the side of the second stator assembly facing the first drive motor.

[0015] In a transport vehicle according to one embodiment of the present invention, the first drive motor further includes a first tire made of rubber material, the first rotor assembly has a first hub, and the first tire is fitted onto the outside of the first hub; and / or,

[0016] The second drive motor also includes a second tire made of rubber material, the second rotor assembly has a second hub, and the second tire is fitted on the outside of the second hub.

[0017] The technical solution provided in this application embodiment can include the following beneficial effects: This application designs a transport vehicle with dual-drive differential steering wheels, including a vehicle body, a power battery, a controller, and a fork arm mounted on the vehicle body. A differential steering wheel is provided at the bottom of the vehicle body. The differential steering wheel includes a first drive component, a second drive component, and a mounting component mounted on the vehicle body. The first drive component and the second drive component are located at both ends of the mounting component so that the differential steering of the transport vehicle can be realized by independently controlling the speed difference between the first drive component and the second drive component. This effectively reduces tire slippage wear during traditional single-drive steering, reduces steering resistance, and reduces the turning radius of the differential steering wheel by at least 30% and the tire wear rate by at least 55%.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a transport vehicle in a first state according to an embodiment of this application;

[0021] Figure 2 yes Figure 1 A schematic diagram of the transport vehicle in its second state;

[0022] Figure 3 yes Figure 2 A schematic diagram of the differential steering wheel at the first angle;

[0023] Figure 4 yes Figure 2 A schematic diagram of the differential steering wheel at the second angle;

[0024] Figure 5 yes Figure 3 An exploded view of the differential steering wheel in the diagram;

[0025] Figure 6 yes Figure 5 A schematic diagram of the structure of the first driving component in the process;

[0026] Figure 7 yes Figure 5 A schematic diagram of the structure of the second driving component in the diagram;

[0027] Figure 8 yes Figure 6 An exploded view of the second driving component;

[0028] Figure 9 yes Figure 5 A partial schematic diagram of the installation components;

[0029] Figure 10 yes Figure 5 A schematic diagram of the fixed disk and encoder in the diagram.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Differential steering wheel;

[0032] 10. First drive assembly; 11. First stator assembly; 111. First shaft mounting part; 112. First rotating mounting part; 12. First rotor assembly; 13. First radiator; 14. First tire;

[0033] 20. Second drive assembly; 21. Second stator assembly; 21a. Second stator body; 21b. Second stator end cover; 211. Second shaft mounting part; 212. Second rotating mounting part; 213. Second receiving cavity; 22. Second rotor assembly; 23. Second radiator; 24. Second tire;

[0034] 30. Mounting component; 31. Suspension bracket; 311. First connecting part; 312. Second connecting part; 32. Fixing plate; 321. Sump structure; 33. Rotating shaft;

[0035] 40. Vibration damping component; 50. Encoder; 60. First connecting rod; 70. Second connecting rod; 80. Bearing component;

[0036] 200, vehicle body; 300, fork arm; 201, rolling element; 400, controller; 500, lifting mechanism. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0038] It should also be understood that the terminology used in this utility model specification is merely for describing specific aspects of the present application. It is important to understand that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] like Figures 1 to 10 As shown, this application provides a transport vehicle with dual-drive differential steering wheels 100. The transport vehicle includes a vehicle body 200 and forks 300 mounted on the vehicle body 200. The differential steering wheels 100 are located at the bottom of the vehicle body 200 and are used to drive the vehicle body 200 to move, thereby enabling the transport of goods, improving transport efficiency, and reducing labor costs. Furthermore, this application can also achieve differential steering through the speed difference of the differential steering wheels 100, effectively reducing tire slippage wear and steering resistance in existing single-drive steering systems.

[0041] In an optional embodiment, the fork arm 300 includes a rolling element 201 and a fork arm 300 body for supporting goods. The fork arm 300 body is liftably mounted on the side of the vehicle body 200 away from the differential steering wheel 100. The rolling element 201 is located on the side of the fork arm 300 body away from the vehicle body 200 and is configured to rotate relative to the fork arm 300 body to support the fork arm 300 body and ensure the stability of the fork arm 300 body when handling goods.

[0042] In one optional embodiment, the transport vehicle includes a lifting mechanism 500, and the fork arm 300 body is connected to the vehicle body 200 via the lifting mechanism 500, so that the fork arm 300 body can be raised and lowered along the height direction of the vehicle body 200. The lifting mechanism 500 includes, but is not limited to, a lifting cylinder, with both ends of the lifting cylinder connected to the vehicle body 200 and the fork arm 300 body respectively. The fork arm 300 body is slidably mounted on a guide rail of the vehicle body 200 in the height direction.

[0043] In an optional embodiment, the transport vehicle also includes a power battery and a controller 400. The controller 400 is located at the upper end of the vehicle body 200, and the power battery is located at the lower end of the vehicle body 200 and electrically connected to the controller 400 and the differential steering wheel 100. The power battery is used to supply power to the controller 400 and the differential steering wheel 100 so that the user can input control commands through the controller 400 to control the differential steering wheel 100 to perform forward, backward and turning actions.

[0044] In one alternative implementation, the controller 400 includes, but is not limited to, a display panel for displaying and / or interactive operation, so that operators can operate the transport vehicle on the display panel and view the working status of the transport vehicle based on the controller 400.

[0045] In an optional embodiment, the differential steering wheel 100 includes a first drive assembly 10, a second drive assembly 20, and a mounting assembly 30. A mounting cavity is formed on the side of the vehicle body 200 away from the fork arm 300. The mounting assembly 30 is disposed in the mounting cavity. The first drive assembly 10 and the second drive assembly 20 are disposed at both ends of the mounting assembly 30 and are electrically connected to the controller 400 and the power battery, so that the power battery can supply power to the first drive assembly 10 and the second drive assembly 20. The controller 400 can rotate the first drive assembly 10 and the second drive assembly 20, thereby realizing the forward, backward, and steering actions of the mounting assembly 30 by coordinating the speeds of the first drive assembly 10 and the second drive assembly 20. Compared with a single-drive transport vehicle, this application can reduce tire slippage and wear and reduce steering resistance when the transport vehicle is turning. Meanwhile, housing the differential steering wheel 100 in the mounting cavity not only lowers the center of gravity of the vehicle body 200, thus ensuring driving stability, but also improves the integration of the transport vehicle and reduces the space occupied inside the vehicle body 200. This not only meets the drive requirements, but also greatly simplifies the structure in terms of size, making it more integrated and modular.

[0046] In an optional embodiment, the differential steering wheel 100 further includes a damping component 40. One end of the mounting component 30 is rotatably connected to one end of the first drive component 10 and the second drive component 20, and the other end of the mounting component 30 is rotatably connected to the other end of the first drive component 10 and the second drive component 20 via the damping component 40. This allows the drive components and the mounting component 30 to absorb ground impact loads while maintaining rigid transmission. Compared to existing rigid steering wheels, this can reduce vibration transmission by approximately 40%, thereby extending service life by minimizing tire wear.

[0047] In one optional embodiment, the first drive assembly 10 is provided with a first rotating shaft mounting portion 111 and a first rotating mounting portion 112 at opposite ends, and the second drive assembly 20 is provided with a second rotating shaft mounting portion 211 and a second rotating mounting portion 212 at opposite ends. One end of the mounting assembly 30 is rotatably mounted between the first rotating shaft mounting portion 111 and the second rotating shaft mounting portion 211, and the other end of the mounting assembly 30 is rotatably connected to the first rotating mounting portion 112 and the second rotating mounting portion 212 through a shock-absorbing component 40, so as to realize the rotatable connection between the mounting assembly 30 and the first drive assembly 10 and the second drive assembly 20.

[0048] In an optional embodiment, the mounting assembly 30 includes a suspension bracket 31 and a rotating shaft 33. One end of the suspension bracket 31 extends downward to a first connecting portion 311, and the rotating shaft 33 passes through and extends out of the first connecting portion 311 for rotatable connection with the first rotating shaft mounting portion 111 and the second rotating shaft mounting portion 211.

[0049] In an optional embodiment, the mounting assembly 30 includes a bearing member 80 disposed in the first rotating shaft mounting portion 111 and the second rotating shaft mounting portion 211, and the rotating shaft 33 passes through the bearing member 80.

[0050] In an optional embodiment, the other end of the suspension bracket 31 is provided with two second connecting parts 312 facing away from the first connecting part 311. Each second connecting part 312 is connected to a shock-absorbing component 40 between the first drive assembly 10 and the second drive assembly 20. That is, there are two shock-absorbing components 40. One of the two shock-absorbing components 40 is connected between one of the second connecting parts 312 and the first drive assembly 10, and the other is connected between the other second connecting part 312 and the second drive assembly 20.

[0051] In an optional embodiment, the first drive assembly 10 includes a first drive motor and a first tire 14 made of rubber material. A first shaft mounting portion 111 and a first rotating mounting portion 112 are disposed at opposite ends of the first drive motor, and the first tire 14 is fitted onto the outside of the first hub of the first drive motor.

[0052] In an optional embodiment, the second drive assembly 20 includes a second drive motor and a second tire 24 made of rubber material. The second shaft mounting portion 211 and the second rotating mounting portion 212 are disposed at opposite ends of the second drive motor, and the second tire 24 is fitted onto the outside of the second hub of the second drive motor.

[0053] In an optional embodiment, the ratio of the shortest distance in the height direction between the suspension bracket 31 and the first drive assembly 10 or the second drive assembly 20 to the outer diameter of the first tire 14 or the second tire 24 is in the range of 0.15 to 2, so as to ensure that at least a sufficient safety clearance is maintained between the suspension bracket 31 and the drive motor housing to prevent interference between the suspension bracket 31 and the first tire 14 or the second tire 24 when the suspension bracket 31 vibrates up and down.

[0054] In an optional implementation, the maximum deformation of the first tire 14 or the second tire 24 under full load is ≤20mm to avoid contact with the suspension bracket 31.

[0055] In an optional embodiment, the shortest distance in the height direction between the suspension bracket 31 and the first drive assembly 10 or the second drive assembly 20 is in the range of 20mm to 25mm, so that the suspension bracket 31 can perform a vertical floating shock absorption function of at least 20mm.

[0056] In an optional embodiment, the mounting assembly 30 further includes a mounting plate 32 disposed on the side of the suspension bracket 31 away from the first drive assembly 10 or the second drive assembly 20, for connection with the vehicle body 200 to enhance the connection strength between the differential steering wheel 100 and the vehicle body 200.

[0057] In an optional embodiment, the differential steering wheel 100 further includes an encoder 50, a fixed disk 32 has a groove structure 321, a first connecting rod 60 is connected to the groove structure 321, and a second connecting rod 70 is provided at the connection position between the upper end face of the fixed disk 32 and the vehicle body 200. The encoder 50 is connected to the first connecting rod 60 and the second connecting rod 70 so as to monitor the rotation angle of the differential steering wheel 100 in real time, thereby controlling the driving speed of the first drive assembly 10 and the second drive assembly 20.

[0058] For example, one end of the first link 60 is disposed in the sink trough structure 321, one end of the second link 70 is fixedly connected to the upper end face of the vehicle body 200 and the fixed disk 32, and the other ends of the first link 60 and the second link 70 extend to the center of the fixed disk 32, so that the encoder 50 can be fixed on the second link 70, and the shaft head of the encoder 50 can be rotatably connected to the first link 60.

[0059] In one alternative embodiment, the first drive motor includes a first radiator 13, a first rotor assembly 12, and a first stator assembly 11 connected to the mounting assembly 30. The first rotor assembly 12 is at least partially rotatably mounted within the first stator assembly 11, and the first radiator 13 is mounted on the side of the first stator assembly 11 facing the second drive motor.

[0060] In one alternative embodiment, the second drive motor includes a second heat sink 23, a second rotor assembly 22, and a second stator assembly 21 connected to the mounting assembly 30. The second rotor assembly 22 is at least partially rotatably mounted within the second stator assembly 21, and the second heat sink 23 is mounted on the side of the second stator assembly 21 facing the first drive motor.

[0061] In an optional embodiment, the first rotor assembly 12 includes a first hub and a first motor shaft connected to the first hub, and a first receiving cavity is formed in the first stator assembly 11, in which the first motor shaft is rotatably mounted.

[0062] In an optional embodiment, the second rotor assembly 22 includes a second hub and a second motor shaft connected to the second hub, and a second receiving cavity 213 is formed in the second stator assembly 21, in which the second motor shaft is rotatably mounted.

[0063] In an optional embodiment, the first stator assembly 11 has a first mounting protrusion and a first connecting protrusion on both sides, the first rotating shaft mounting part 111 is detachably mounted on the first mounting protrusion, and the first rotating mounting part 112 is detachably mounted on the first connecting protrusion.

[0064] In one optional embodiment, the second stator assembly 21 has a second mounting protrusion and a first connecting protrusion on both sides, the second rotating shaft mounting part 211 is detachably mounted on the second mounting protrusion, and the second rotating mounting part 212 is detachably mounted on the second connecting protrusion.

[0065] In one optional embodiment, the first stator assembly 11 includes a first stator body and a first stator end cover, and the second stator assembly 21 includes a second stator body 21a and a second stator end cover 21b. Both the first stator body and the second stator body 21a are hollow structures. The first stator end cover covers the side of the first stator body away from the first hub to form a first receiving cavity, and the second stator end cover 21b covers the side of the second stator body 21a away from the second hub to form a second receiving cavity 213. The first radiator 13 is disposed on the first stator end cover, and the second radiator 23 is disposed on the second stator end cover 21b.

[0066] By adopting the above technical solution, this application combines the first drive assembly 10 and the second drive assembly 20 to form a differential steering wheel 100. Utilizing the encoder 50 above the first drive assembly 10 and the second drive assembly 20, the encoder 50 can monitor the rotation angle of the differential steering wheel 100 in real time during its turning process. Then, the controller 400 automatically adjusts the speeds of the first drive assembly 10 and the second drive assembly 20, making the entire vehicle body 200 turn more quickly and complete the turning action in a very small space. This results in a small turning angle and rapid turning, thereby improving the efficiency of the transport vehicle during transport and enhancing its applicability. Furthermore, the dual-drive differential steering wheel 100, formed by the combination of the first drive assembly 10 and the second drive assembly 20, achieves rotation through the differential operation of the two drive wheels, thus eliminating the need for a steering motor in the vehicle body 200. Simultaneously, since both wheels rotate around the central axis of the encoder 50, wheel wear can be reduced, and even ground wear can be avoided. Furthermore, the controller 400 can also control the first drive assembly 10 and the second drive assembly 20 to move at the same speed, so that the vehicle body 200 can move forward or backward. What originally required a high-power, high-torque drive assembly to move the vehicle body 200 is now accomplished by two low-power drive assemblies. Therefore, it is particularly suitable for light-load applications under one ton. Its overall integration is higher, greatly reducing the space occupied inside the vehicle body 200. It not only meets drive requirements but also significantly simplifies the structure in terms of size, achieving integration and modularity.

[0067] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0069] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A transport vehicle with dual-drive differential steering wheels, characterized in that, The transport vehicle includes a vehicle body, a power battery, a controller, and forks mounted on the vehicle body. A differential steering wheel is provided at the bottom of the vehicle body. The differential steering wheel is electrically connected to the power battery and the controller and is used to drive the vehicle body to move. The differential steering wheel includes a first drive assembly, a second drive assembly, and a mounting assembly. A mounting cavity is formed on the side of the vehicle body away from the fork arm. The mounting assembly is disposed in the mounting cavity. The first drive assembly and the second drive assembly are disposed at both ends of the mounting assembly and are electrically connected to the controller and the power battery.

2. The transport vehicle according to claim 1, characterized in that, The differential steering wheel also includes a shock-absorbing component. One end of the mounting component is rotatably connected to one end of the first drive component and the second drive component, and the other end of the mounting component is rotatably connected to the other end of the first drive component and the second drive component through the shock-absorbing component.

3. The transport vehicle according to claim 2, characterized in that, The mounting assembly includes a suspension bracket and a rotating shaft. One end of the suspension bracket extends downward to have a first connecting portion. The rotating shaft passes between the first drive assembly and the second drive assembly and is used for rotatably connecting with the first drive assembly and the second drive assembly.

4. The transport vehicle according to claim 3, characterized in that, The other end of the suspension bracket is provided with two second connecting parts facing away from the first connecting part, and each second connecting part is connected to a shock-absorbing component between the first drive assembly and the second drive assembly.

5. The transport vehicle according to claim 3, characterized in that, The ratio of the shortest distance in the height direction between the suspension bracket and the first drive assembly or the second drive assembly to the outer diameter of the first tire of the first drive assembly or the second tire of the second drive assembly is in the range of 0.15 to 2.

6. The transport vehicle according to claim 3 or 5, characterized in that, The shortest distance between the suspension bracket and the first or second drive assembly in the height direction is in the range of 20mm to 25mm.

7. The transport vehicle according to claim 3, characterized in that, The mounting assembly also includes a mounting plate, which is disposed on the side of the suspension bracket away from the first drive assembly or the second drive assembly, for connection to the vehicle body.

8. The transport vehicle according to claim 7, characterized in that, The differential steering wheel also includes an encoder. The fixed plate has a groove structure, and a first connecting rod is connected to the groove structure. A second connecting rod is provided at the connection position between the upper end face of the fixed plate and the vehicle body. The encoder is connected to the first connecting rod and the second connecting rod.

9. The transport vehicle according to claim 1, characterized in that, The first drive assembly includes a first drive motor, and the second drive assembly includes a second drive motor. The first drive motor includes a first heat sink, a first rotor assembly, and a first stator assembly connected to a mounting assembly. The first rotor assembly is at least partially rotatably mounted within the first stator assembly, and the first heat sink is mounted on the side of the first stator assembly facing the second drive motor. The second drive motor includes a second heat sink, a second rotor assembly, and a second stator assembly connected to a mounting assembly. The second rotor assembly is at least partially rotatably mounted within the second stator assembly, and the second heat sink is mounted on the side of the second stator assembly facing the first drive motor.

10. The transport vehicle according to claim 9, characterized in that, The first drive motor further includes a first tire made of rubber material, the first rotor assembly having a first hub, and the first tire being fitted onto the outside of the first hub; and / or, The second drive motor also includes a second tire made of rubber material, the second rotor assembly has a second hub, and the second tire is fitted on the outside of the second hub.

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