Logistics vehicle and logistics system

Abstract

The present disclosure relates to a logistics vehicle and a logistics system. The logistics vehicle includes a frame, a lift assembly including lift wheels movably mounted on the frame, the lift wheels configured to be extendable relative to the frame to cooperate with a vertically arranged first rail assembly, whereby the logistics vehicle moves along the first rail assembly, and the lift wheels configured to be retractable relative to the frame; and a power intake assembly movably mounted on the frame, the power intake assembly configured to be extendable relative to the frame to take in power when the lift wheels extend relative to the frame to cooperate with the first rail assembly, and the power intake assembly further configured to retract when the lift wheels retract relative to the frame. The logistics vehicle provided in the present disclosure draws power during lift, the logistics vehicle is conductive to achieve lift operation, and the logistics vehicle will not collide with product shelves, machine bodies, rail assemblies, or other foreign objects after completing the lift, thereby reducing safety risks.

Description

Technical Field

[0001] Cross - reference to Related Applications This disclosure claims priority based on Chinese Application No. 202010058602.8, filed on January 19, 2020, the entire disclosure of which is incorporated herein by reference.

[0002] This disclosure relates to the field of warehouse storage and logistics equipment, particularly to logistics vehicles and logistics systems.

Background Art

[0003] Slide - wire power supplies are often used for mobile equipment such as shuttle vehicles, cross - belt sorting lines, stackers, and other logistics equipment, and have the advantages of high current, stability and reliability, and large stroke. Specific usage forms are as follows. That is, a form in which the slide - wire is installed on a fixed component such as a goods shelf, a machine body, or a rail assembly, and the current collector is installed on the vehicle body or a moving component. The movement trajectory of the vehicle body or the moving component coincides with the arrangement shape of the slide - wire, and the brush of the current collector is always in contact with the conductor of the slide - wire to ensure continuous power supply.

[0004] For some of the equipment, since part of the movement path trajectory is complex and does not require power, the slide - wire is cut, the brush of the current collector is disengaged from the conductor of the slide - wire in part of the movement path trajectory, and after entering a simple path, the slide - wire is installed and the current collector is connected to ensure power supply.

[0005] A current collector and a slide wire that are in constant contact or partially detached are suitable for situations where the vehicle body or equipment performs a linear reciprocating motion or a circular periodic motion in the same horizontal plane. This structure cannot adapt to situations where the vehicle body or equipment needs to leave the original motion plane or switch the rail assembly for movement. Summary of the Invention Means for Solving the Problems

[0006] According to one aspect of some embodiments of the present disclosure, a logistics vehicle is provided. The logistics vehicle includes a frame, a lifting assembly including lifting wheels movably provided on the frame, the lifting wheels being configured to be extendable relative to the frame to cooperate with a first rail assembly arranged in the vertical direction, whereby the logistics vehicle moves along the first rail assembly and the lifting wheels are configured to be retractable relative to the frame, the lifting assembly; a power intake assembly movably provided on the frame, the power intake assembly being configured to be extendable relative to the frame to take in power when the lifting wheels extend relative to the frame to cooperate with the first rail assembly, and the power intake assembly being further configured to retract when the lifting wheels retract relative to the frame.

[0007] In some embodiments, the lifting assembly further includes a first axle movably provided on the frame, and the lifting wheels are provided on the first axle.

[0008] In some embodiments, the lifting assembly further includes a first guide sleeve fixedly provided on the frame, and the first axle movably penetrates through the first guide sleeve.

[0009] In some embodiments, the lifting assembly further includes support wheels, the support wheels are provided on the first axle, the support wheels are closer to the outside of the frame relative to the lifting wheels, and the diameter of the support wheels is smaller than the diameter of the lifting wheels.

[0010] In some embodiments, the lifting assembly further includes a second axle and guide wheels, the second axle is movably provided on the frame, and the guide wheels are provided on the second axle.

[0011] In some embodiments, the lifting assembly further includes a second guide sleeve, the second guide sleeve is fixedly provided on the frame, and the second axle movably penetrates through the second guide sleeve.

[0012] In some embodiments, the lifting assembly further includes a connecting plate, the connecting plate connects the first axle and the second axle, and the logistics vehicle includes a power device that is drivably connected to the connecting plate so as to drive the connecting plate to move relative to the frame.

[0013] In some embodiments, the power intake assembly is provided on the connecting plate.

[0014] In some embodiments, the power intake assembly includes a guide rail, a slider, and a current collector, the guide rail is movably provided on the frame, the slider is movably provided on the guide rail, and the current collector is provided on the slider.

[0015] In some embodiments, the power intake assembly includes a rotary power source, a first rod, and a second rod, the rotary power source is provided on the guide rail, the first end of the first rod is connected to the output shaft of the rotary power source, the second end of the first rod is connected to the first end of the second rod, and the second end of the second rod is connected to the slider.

[0016] In some embodiments, two lifting assemblies are respectively provided on two opposite side surfaces of the frame.

[0017] In another aspect of some embodiments of the present disclosure, a logistics system is provided, the logistics system includes a first rail assembly and the above-mentioned logistics vehicle, the first rail assembly is arranged vertically, and the logistics vehicle is configured to be movable along the first rail assembly.

[0018] In some embodiments, the first rail assembly a first rail arranged vertically and having a U-shaped cross-section, a rack provided in the U-shaped cavity of the first rail and arranged in the extending direction of the first rail for cooperating with the lifting wheels, a slide wire provided in the U-shaped cavity of the first rail and arranged in the extending direction of the first rail for cooperating with the power intake assembly to supply power, are included.

[0019] In some embodiments, the lifting assembly includes support wheels, the first rail assembly includes support guides, the support guides are provided in the U-shaped cavity of the first rail, and are arranged in the extending direction of the first rail for cooperating with the support wheels to support, guide and limit the support wheels.

[0020] In some embodiments, the logistics system further includes at least two second rail assemblies, the at least two second rail assemblies are arranged horizontally, two adjacent second rail assemblies among the at least two second rail assemblies are arranged vertically, and the logistics vehicle is configured to be movable along the at least two second rail assemblies and to be movable along the first rail assembly to switch to second rail assemblies installed at different heights.

[0021] Based on the above technical solutions, the present disclosure has at least the following beneficial effects.

[0022] In some embodiments, when the logistics vehicle needs to move along the first rail assembly, the lifting wheels extend relative to the frame to cooperate with the vertically arranged first rail assembly. When the logistics vehicle finishes lifting, the lifting wheels retract relative to the frame and are installed within the frame. Moreover, when the lifting wheels extend relative to the frame to cooperate with the first rail assembly, the power intake assembly extends relative to the frame to take in power, and when the lifting wheels retract relative to the frame, the power intake assembly retracts. The power intake assembly is used to provide motive power for the lifting of the logistics vehicle. Neither the lifting wheels nor the power intake assembly will collide with the commodity shelves, machine bodies, rail assemblies, or other foreign objects, thereby reducing the safety risk.

[0023] The drawings described herein provide a deeper understanding of the present disclosure and are used to form a part of this application. Embodiments and their descriptions that assist in understanding the present disclosure are used in the description of the present disclosure but do not unduly limit the present disclosure.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

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Figure 4

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Figure 8

[0025] Regarding the technical solutions in this embodiment, they will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Needless to say, the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of this application.

[0026] In the description of the present disclosure, the relationships of directions or positions indicated by terms such as "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "upper", "bottom", "inner", "outer", etc. are the relationships of directions or positions shown based on the drawings, and do not indicate or imply that the shown device or element needs to have a specific direction or be constructed and operated in a specific direction. It is only for convenience in explaining the present disclosure to simplify the description. Therefore, it should be understood that the terms should not be construed as limiting the protection scope of the present disclosure.

[0027] Some embodiments of the present disclosure present a logistics vehicle and a logistics system suitable for ascending operations.

[0028] As shown in FIG. 1, in some embodiments, the logistics vehicle includes a frame 1, a lifting assembly 2, and a power intake assembly 3.

[0029] Frame 1 is the main body of the logistics vehicle.

[0030] As shown in FIGS. 2 and 3, the lifting assembly 2 includes lifting wheels 21. The lifting wheels 21 are movably provided on the frame 1. The lifting wheels 21 are configured to be able to extend relative to the frame 1 to cooperate with a first rail assembly 4 arranged in the vertical direction, whereby the logistics vehicle moves along the first rail assembly 4, and the lifting wheels 21 are configured to be able to retract into the frame 1 to avoid collision with foreign objects and reduce potential safety hazards.

[0031] The first rail assembly 4 is arranged in the vertical direction, and the lifting wheels 21 move laterally relative to the frame 1, that is, the lifting wheels 21 extend laterally relative to the frame 1 to cooperate with the first rail assembly 4 arranged in the vertical direction, whereby the logistics vehicle moves up and down along the first rail assembly 4.

[0032] The power intake assembly 3 is movably provided on the frame 1. The power intake assembly 3 extends relative to the frame 1 to take in power when the lifting wheels 21 extend relative to the frame 1 and cooperate with the first rail assembly 4, and is configured to supply motive power for the up and down movement of the first rail assembly 4. The power intake assembly 3 is configured to retract when the lifting wheels 21 retract relative to the frame 1 to avoid collision with foreign objects and reduce potential safety hazards.

[0033] In some embodiments, the logistics vehicle further includes wheels 11. The wheels 11 are provided on the frame 1. The wheels 11 are configured to move and travel on a second rail assembly 5 arranged laterally or horizontally.

[0034] In some embodiments, the logistics vehicle provided can move both on a second rail assembly 5 arranged horizontally or laterally and vertically up and down on a first rail assembly 4 arranged vertically. Therefore, the dead weight of the vehicle body is strictly controlled, and the electrical energy storage capacity of the body is limited. When the logistics vehicle performs horizontal movement, the energy consumption is small, and the energy stored in the energy storage element of the body is sufficient for use. However, during vertical ascent, the energy consumption is large, and the energy storage element of the body cannot supply sufficient energy. Therefore, when the lifting wheels 21 extend out relative to the frame 1 and cooperate with the first rail assembly 4, and the logistics vehicle moves along the first rail assembly 4, the power intake assembly 3 extends out relative to the frame 1 to take in power to meet the vertical ascent condition of the logistics vehicle. Thereby, the logistics vehicle can move both on a second rail assembly 5 arranged horizontally or laterally and on a first rail assembly 4 arranged vertically.

[0035] In some embodiments, when the logistics vehicle needs to move along the first rail assembly 4, the lifting wheels 21 extend out relative to the frame 1 to cooperate with the first rail assembly 4 arranged vertically. When the logistics vehicle finishes ascending and needs to move on a second rail assembly 5 arranged horizontally or laterally, the lifting wheels 21 retract relative to the frame 1 and are installed within the frame 1. Moreover, when the lifting wheels 21 extend out relative to the frame 1 to cooperate with the first rail assembly 4, the power intake assembly 3 extends out relative to the frame 1 to take in power. When the lifting wheels 21 retract relative to the frame 1, the power intake assembly retracts. Therefore, neither the lifting wheels 21 nor the power intake assembly 3 will collide with the goods shelves, the machine body, the rail assembly, or other foreign objects, thereby reducing the risk.

[0036] In some embodiments, the lifting assembly 2 includes a first axle 22. The first axle 22 is movably provided on the frame 1, and the lifting wheel 21 is provided on the first axle 22. The lifting wheel 21 moves together with the movement of the first axle 22. The lifting wheel 21 is configured to cooperate with the rack 42 of the first rail assembly 4 to achieve the movement of the logistics vehicle along the first rail 41 of the first rail assembly 4.

[0037] In some embodiments, the lifting assembly 2 includes a first guide sleeve 23. The first guide sleeve 23 is fixedly provided on the frame 1, and the first axle 22 penetrates through the first guide sleeve 23 movably. The first axle 22 is coaxial with the first guide sleeve 23, the first axle 22 moves along the first guide sleeve 23, and the first guide sleeve 23 guides the movement of the first axle 22.

[0038] In some embodiments, the lifting assembly 2 includes a support wheel 24. The support wheel 24 is provided on the first axle 22, the support wheel 24 is closer to the outside of the frame 1 relative to the lifting wheel 21, and the diameter of the support wheel 24 is smaller than the diameter of the lifting wheel 21. The support wheel 24 is configured to cooperate with the support guide 44 of the first rail assembly 4 to support, limit and guide the movement of the logistics vehicle along the first rail 41 of the first rail assembly 4.

[0039] In some embodiments, the lifting assembly 2 includes a second axle 25 and a guide wheel 26. The second axle 25 is movably provided on the frame 1, and the guide wheel 26 is provided on the second axle 25. The guide wheel 26 moves together with the movement of the second axle 25. The guide wheel 26 is configured to cooperate with the inner wall of the U-shaped cavity of the first rail 41 of the first rail assembly 4 to guide the movement of the logistics vehicle along the first rail 41 of the first rail assembly 4.

[0040] In some embodiments, the lifting assembly 2 includes a second guide sleeve 27. The second guide sleeve 27 is fixedly provided on the frame 1, and the second axle 25 penetrates through the second guide sleeve 27 movably. The second axle 25 is coaxial with the second guide sleeve 27, the second axle 25 moves along the second guide sleeve 27, and the second guide sleeve 27 guides the movement of the second axle 25.

[0041] In some embodiments, the first axle 22 is parallel to the second axle 25, and the second axle 25 is installed on the first axle 22. The power intake assembly 3 is provided between the first axle 22 and the second axle 25.

[0042] In some embodiments, the lifting assembly 2 includes a connection plate 28. The connection plate 28 connects the first axle 22 and the second axle 25. The logistics vehicle includes a power device that is drivably connected to the connection plate 28 to drive the connection plate 28 to move relative to the frame 1. The connection plate 28 moves relative to the frame 1, and thus, the first axle 22 and the second axle 25 move relative to the frame 1.

[0043] The connection plate 28 is connected to each of the first end of the first axle 22 and the first end of the second axle 25. The lifting wheels 21 and the support wheels 24 are mounted on the second end of the first axle 22, and the guide wheels 26 are mounted on the second end of the second axle 25.

[0044] In some embodiments, the power intake assembly 3 is provided on the connection plate 28. The power intake assembly 3 moves along with the movement of the connection plate 28. The power intake assembly 3 is mounted on the first side surface of the connection plate 28, the first axle 22 and the second axle 25 are mounted on the first side surface of the connection plate 28, and the power intake assembly 3 is installed between the first axle 22 and the second axle 25.

[0045] Under the drive of the power unit, the first axle 22 and the second axle 25 can extend individually and synchronously along the first guide sleeve 23 and the second guide sleeve 27 towards the outside of the frame 1. On the other hand, the power intake assembly 3 also extends simultaneously towards the outside of the frame 1 as shown in FIG. 3.

[0046] Under the drive of the power unit, the first axle 22 and the second axle 25 can retract individually and synchronously along the first guide sleeve 23 and the second guide sleeve 27 towards the inside of the frame 1. On the other hand, the power intake assembly 3 also retracts simultaneously towards the inside of the frame 1 as shown in FIG. 2.

[0047] The power intake assembly 3 is mounted on the lifting assembly 2 and can extend and retract together with the guide wheels 26, the lifting wheels 21, the support wheels 24, and other components, without being fixedly installed alone. In this way, a simple structure and good synchronization are achieved.

[0048] In some embodiments, as shown in FIGS. 4 and 5, the power intake assembly 3 includes a guide rail 31, a slider 32, and a current collector 33. The guide rail 31 is movably provided on the frame 1, the slider 32 is movably provided on the guide rail 31, and the current collector 33 is provided on the slider 32. The current collector 33 is configured to engage with the slide wire 43 of the first rail assembly 4 to take in power. When the logistics vehicle rises, the brush of the current collector 33 is always in contact with the conductor of the slide wire 43, ensuring a continuous power supply.

[0049] The extending direction of the guide rail 31 is the same as the extending direction of the first axle 22 and the second axle 25. The sliding direction of the slider 32 is the same as the extending direction of the first axle 22 and the second axle 25.

[0050] When the logistics vehicle is moving vertically along the first rail assembly 4, the current collector 33 extends with respect to the frame 1 and engages with the slide wire 43 of the first rail assembly 4 to take in power. When the logistics vehicle is moving horizontally or laterally along the second rail assembly 5, the current collector 33 retracts inside the frame 1 with respect to the frame 1 to avoid collision with the shelves, the machine body, the rail assembly, or other fixed components.

[0051] In some embodiments, the power intake assembly 3 includes a rotary power source 34, a first rod 35, and a second rod 36. The rotary power source 34 is provided on the guide rail 31. The first end of the first rod 35 is connected to the output shaft of the rotary power source 34, and the second end of the first rod 35 is connected to the first end of the second rod 36. The second end of the second rod 36 is connected to the slider 32.

[0052] The rotary power source 34 includes a motor or a rotary cylinder, etc.

[0053] The guide rail 31, the first rod 35, the second rod 36, and the slider 32 form a set of crank-connected rod-slider mechanisms. The current collector 33 is mounted on one end of the slider 32 and is driven by the rotary power source 34, and the slider 32 causes the current collector 33 to perform a reciprocating motion. The stroke of the reciprocating motion of the current collector 33 can be controlled by controlling the rotation angle of the rotary power source 34.

[0054] The state when the current collector 33 extends is shown in FIG. 5, and the state when the current collector 33 retracts is shown in FIG. 4.

[0055] The power intake assembly 3 itself has the functions of extending and retracting as well as a controllable stroke. Thereby, in order to improve the contact reliability between the current collector 33 and the slide wire 43, the stroke of the extension and retraction of the current collector 33 is increased, its position is controllable, and the current collector 33 can be completely retracted inside the frame 1, thereby eliminating the risk of collision with the goods shelf, the machine body, the rail assembly, or other fixed components. Moreover, when the logistics track switches between the horizontal movement and the vertical movement, the logistics track can smoothly achieve the engagement or disengagement of the current collector 33 and the slide wire 43, and it can be ensured that the extension and retraction of the current collector 33 are controllable to improve the safety of the engagement and disengagement.

[0056] In some embodiments, two lifting assemblies 2 are provided on two opposite side surfaces of the frame 1. Each logistics vehicle is provided with two or more sets of the lifting assemblies 2, and the two lifting assemblies 2 are symmetrically distributed on the left side surface and the right side surface of the frame 1.

[0057] Some embodiments provide a logistics system, and the logistics system includes the first rail assembly 4 and the logistics vehicle in the above embodiments. The first rail assembly 4 is arranged in the vertical direction, and the logistics vehicle is configured to be movable along the first rail assembly 4.

[0058] In some embodiments, as shown in FIG. 6, the first rail assembly 4 includes a first rail 41, a rack 42, and a slide wire 43.

[0059] The first rail 41 is arranged in the vertical direction and has a U-shaped cross section.

[0060] The rack 42 is provided in the U-shaped cavity of the first rail 41 and is arranged in the extending direction of the first rail 41 to cooperate with the lifting wheels 21. The lifting wheels 21 are gears and engage with the rack 42 to achieve the lifting and lowering movements of the logistics vehicle.

[0061] The slide wire 43 is provided in the U-shaped cavity of the first rail 41 and is arranged in the extending direction of the first rail 41 to cooperate with the current collector 33 of the power intake assembly 3 to supply power.

[0062] When the power intake assembly 3 draws power, the brush of the current collector 33 is always in contact with the conductor of the slide wire 43 to ensure continuous power supply.

[0063] In some embodiments, the first rail assembly 4 includes a support guide 44. The support guide 44 is provided in the U-shaped cavity of the first rail 41 and is arranged in the extending direction of the first rail 41 to support, guide, and limit the support wheels 24 in cooperation with the lifting wheels 21.

[0064] In some embodiments, the logistics system includes at least two second rail assemblies 5. The at least two second rail assemblies 5 are arranged in the lateral or horizontal direction, two adjacent second rail assemblies 5 are arranged vertically, and the logistics vehicle is configured to be able to move along at least two second rail assemblies 5 and to move along the first rail assembly 4 to switch to second rail assemblies 5 installed at different heights.

[0065] In some embodiments, the second rail assembly 5 is arranged horizontally and the first rail assembly 4 is arranged perpendicular to the horizontal plane. The lifting assembly 2 can perform extending and retracting movements along the horizontal direction of the frame 1, the power intake assembly 3 is mounted on the lifting assembly 2, and the number of the first rail assemblies 4 is the same as the number of the lifting assemblies 2.

[0066] When the logistics vehicle switches from horizontal movement to vertical upward movement, the current collector 33 needs to be installed in a suitable position to ensure good contact with the slide wire 43. When the logistics vehicle moves horizontally, the current collector 33 is stored and installed inside the frame 1 to prevent the current collector 33 from being caught by foreign objects during movement.

[0067] When the logistics vehicle moves horizontally along the second rail assembly 5, both the lifting assembly 2 and the power intake assembly 3 are in a contracted state, and the current collector 33 is stored inside the frame 1. The relative position between the logistics vehicle and the first rail assembly 4 is shown in FIG. 7.

[0068] As shown in FIG. 8, when the logistics vehicle needs to ascend, the lifting assembly 2 extends out of the frame 1, the guide wheels 26, the lifting wheels 21 and the support wheels 24 extend into the U-shaped cavity of the first rail 41, and the lifting wheels 21 engage with the rack 42. On the other hand, the power intake assembly 3 also extends out of the frame 1, and the current collector 33 is connected to the slide wire 43 to ensure power supply to the logistics vehicle.

[0069] After the ascent is completed, both the lifting assembly 2 and the power intake assembly 3 retract.

[0070] Based on the embodiments of the present disclosure described above, one or more technical features of one of the embodiments can be beneficially combined with one or more other embodiments unless explicitly negated.

[0071] In the description of the present disclosure, it should be understood that the use of terms such as "first", "second", "third", etc. to define parts and components is only for convenience in distinguishing the parts and components described above. Unless otherwise specified, the above terms have no specific meaning and therefore cannot be construed as a limitation on the protection scope of the present disclosure.

[0072] Finally, it should be noted that the above embodiments do not limit the technical solutions of the present disclosure, but are only used for explanation. Although the present disclosure has been described in detail with reference to the preferred embodiments, it is still possible to make modifications to the specific implementation forms in the present disclosure or make equivalent replacements to some of its technical features. It should be understood by those skilled in the art that such modifications and equivalent replacements should be included within the scope of the technical solutions seeking protection in the present disclosure without departing from the spirit of the technical solutions of the present disclosure.

Explanation of Reference Numerals

[0073] 1 Frame 2 Lifting Assembly 3 Power Input Assembly 4 First Rail Assembly 5 Second Rail Assembly 11 Wheel 21 Lifting Wheel 22 First Axle 23 First Guide Sleeve 24 Support Wheel 25 Second Axle 26 Guide Wheel 27 Second Guide Sleeve 28 Connection Plate 31 Guide Rail 32 Slider 33 Current Collector 34 Rotary Power Source 35 First Rod 36 Second Rod 41 First Rail 42 Rack 43 Slide Wire 44 Support Guide

Claims

1. A logistics vehicle, comprising: a frame (1); a lifting assembly (2) provided movably on the frame (1) and including a lifting wheel (21), the lifting wheel (21) being configured to be extendable relative to the frame (1) for cooperation with a first rail assembly (4) arranged in the vertical direction, whereby the logistics vehicle moves along the first rail assembly (4), and the lifting wheel (21) being configured to be retractable relative to the frame (1); a power intake assembly (3) provided movably on the frame (1), the power intake assembly (3) being configured to be extendable relative to the frame (1) for taking in power when the lifting wheel (21) extends relative to the frame (1) to cooperate with the first rail assembly (4), and the power intake assembly (3) being further configured to retract when the lifting wheel (21) retracts relative to the frame (1); and wherein the lifting assembly (2) is configured to extend outward from the frame (1) for engagement with the first rail assembly (4) arranged in the vertical direction when the logistics vehicle needs to be lifted, and the power intake assembly (3) is configured to simultaneously extend outward from the frame (1) for drawing out power.

2. The logistics vehicle according to claim 1, wherein the lifting assembly (2) further comprises a first axle (22), the first axle (22) being movably arranged on the frame (1), and the lifting wheel (21) being provided on the first axle (22).

3. The logistics vehicle according to claim 2, wherein the lifting assembly (2) further comprises a first guide sleeve (23), the first guide sleeve (23) being fixedly arranged on the frame (1), and the first axle (22) movably penetrating through the first guide sleeve (23).

4. The lifting assembly (2) further comprises support wheels (24), the support wheels (24) are provided on the first axle (22), the support wheels (24) are closer to the outside of the frame (1) than the lifting wheels (21), and the diameter of the support wheels (24) is smaller than the diameter of the lifting wheels (21). The logistics vehicle according to claim 2 or 3.

5. The lifting assembly (2) further comprises a second axle (25) and guide wheels (26), the second axle (25) is movably provided on the frame (1), and the guide wheels (26) are provided on the second axle (25). The logistics vehicle according to any one of claims 2 to 4.

6. The lifting assembly (2) further comprises a second guide sleeve (27), the second guide sleeve (27) is fixedly provided on the frame (1), and the second axle (25) movably penetrates the second guide sleeve (27). The logistics vehicle according to claim 5.

7. The lifting assembly (2) further comprises a connecting plate (28), the connecting plate (28) connects the first axle (22) and the second axle (25), and the logistics vehicle is drivingly connected to the connecting plate (28) so as to drive the connecting plate (28) to move relative to the frame (1). The logistics vehicle according to claim 5 or 6, comprising a power device.

8. The power intake assembly (3) is provided on the connecting plate (28). The logistics vehicle according to claim 7.

9. The power intake assembly (3) comprises a guide rail (31), a slider (32) and a current collector (33), the guide rail (31) is movably provided on the frame (1), the slider (32) is movably provided on the guide rail (31), and the current collector (33) is provided on the slider (32). The logistics vehicle according to any one of claims 1 to 8.

10. The power intake assembly (3) includes a rotary power source (34), a first rod (35), and a second rod (36). The rotary power source (34) is provided on the guide rail (31). The first end of the first rod (35) is connected to the output shaft of the rotary power source (34). The second end of the first rod (35) is connected to the first end of the second rod (36). The second end of the second rod (36) is connected to the slider (32). The logistics vehicle according to claim 9.

11. The two lifting assemblies (2) are respectively provided on two opposite side surfaces of the frame (1). The logistics vehicle according to any one of claims 1 to 10.

12. A logistics system comprising a first rail assembly (4) and the logistics vehicle according to any one of claims 1 to 11, wherein the first rail assembly (4) is arranged in the vertical direction, and the logistics vehicle is configured to be movable along the first rail assembly (4). Logistics system.

13. The first rail assembly (4) is A first rail (41) arranged in the vertical direction and having a U-shaped cross section, A rack (42) provided in the U-shaped cavity of the first rail (41) and arranged in the extending direction of the first rail (41) for cooperating with the lifting wheel (21), A slide wire (43) provided in the U-shaped cavity of the first rail (41) and arranged in the extending direction of the first rail (41) for cooperating with the power intake assembly (3) to supply power, The logistics system according to claim 12, comprising.

14. The lifting assembly (2) includes a support wheel (24). The first rail assembly (4) includes a support guide (44). The support guide (44) is provided in the U-shaped cavity of the first rail (41) and cooperates with the support wheel (24) to support, guide, and limit the support wheel (24). The logistics system according to claim 13, arranged in the extending direction of the first rail (41).

15. The logistics system according to claim 13 or 14, further comprising at least two second rail assemblies (5), wherein the at least two second rail assemblies (5) are arranged horizontally, and two adjacent second rail assemblies (5) among the at least two second rail assemblies (5) are arranged vertically, and the logistics vehicle is configured to be movable along at least two of the second rail assemblies (5) and to be movable along the first rail assembly (4) for switching to a second rail assembly (5) installed at a different height.

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