Chassis for warehousing logistics vehicles, warehousing logistics vehicles, and warehousing logistics systems

Abstract

The present disclosure provides a chassis for a warehouse logistics vehicle, a warehouse logistics vehicle, and a warehouse logistics system. The chassis for the warehouse logistics vehicle includes a vehicle frame and a running gear attached to the vehicle frame, the running gear including a first shaft attached to the first vehicle frame, a climbing wheel attached to the first shaft configured to raise / lower the chassis, a second shaft attached to the first vehicle frame and arranged parallel to and spaced apart from the first shaft, and a running wheel attached to the second shaft configured to run the chassis. The warehouse logistics vehicle includes the chassis. The warehouse logistics system includes the warehouse logistics vehicle. The chassis for the warehouse logistics vehicle helps to improve the load-bearing condition of the first shaft.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure is based on and claims priority to Chinese Patent Application No. 202011504181.3, entitled "Chassis for Warehousing Logistics Vehicle, Warehousing Logistics Vehicle, and Warehousing Logistics System," filed on December 18, 2020, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of logistics equipment, and more particularly to chassis for warehousing logistics vehicles, warehousing logistics vehicles, and warehousing logistics systems. [Background technology]

[0003] In a logistics system, warehousing logistics vehicles are commonly used transport equipment.

[0004] In the prior art, a climbable warehouse logistics vehicle has a pair of climbing wheels and a pair of running wheels on each side of the vehicle body. Each pair of climbing wheels and running wheels is coaxially attached to a pair of rotating ball spline shaft assemblies. The climbing wheels are attached to one end of the spline shaft, and the running wheels are attached to the end of the rotating spline housing. The nut outer flange of the rotating ball spline shaft assembly is fixedly attached to the movable vehicle frame. The climbing wheels and running wheels can move axially relative to each other. Furthermore, the climbing wheels and running wheels can rotate synchronously through the transmission of the spline shaft and the rotating spline housing. The movable vehicle frame, the nut outer flange, the rotating spline housing, and the running wheels can move axially relative to the first vehicle frame. A motor and a reducer are located on the fixed vehicle frame, and their output shaft rotates the spline housing. The spline housing is coaxial with the spline shaft and can rotate the spline shaft. The climbing wheels and spline shaft can move axially together relative to the motor, the reducer, and the spline housing. When the vehicle body is traveling on a horizontal rail or the ground, the climbing wheel and spline shaft are retracted inside the vehicle body, the climbing wheel is positioned inside the traveling wheel, and the movable vehicle frame, the nut outer flange, the rotating spline housing and the traveling wheel are positioned away from the inside of the vehicle body.

[0005] In the above-mentioned prior art, when the warehouse storage logistics vehicle is climbing, the climbing wheel and spline shaft are extended to the outside of the vehicle body and positioned away from the inside of the vehicle body, and the movable vehicle frame, the nut outer flange, the rotating spline housing and the running wheel are retracted toward the inside of the vehicle body and positioned closer to the inside of the vehicle body. Summary of the Invention [Means for solving the problem]

[0006] A first aspect of the present disclosure is 1st A vehicle frame; 1st and a running gear attached to the vehicle frame, wherein the running gear comprises: a first shaft attached to the first vehicle frame; a climbing wheel attached to the first shaft configured to raise / lower the chassis; a second shaft attached to the first vehicle frame and positioned parallel to and spaced apart from the first shaft; a running wheel configured to run the chassis and attached to the second shaft;

[0010] A chassis is provided, comprising:

[0007] In some embodiments, the chassis further includes a traveling drive mechanism in driving connection with the first shaft and the second shaft, the driving drive mechanism driving the first shaft and the second shaft to rotate.

[0008] In some embodiments, The traveling drive mechanism includes a reducer and a reducer spline housing, and an output shaft of the reducer is sleeved on the outside of the reducer spline housing; The first shaft includes a first spline shaft, a first spline is provided on the first spline shaft, and a reducer spline housing cooperates with the first spline.

[0009] In some embodiments, the running gear includes a first rotating ball spline sleeve assembly, the first rotating ball spline sleeve assembly including a first outer flange and a first ball spline housing, the first outer flange being fixedly connected to the first vehicle frame, the first shaft including a first spline shaft, a first spline provided on the first spline shaft, the first ball spline housing cooperating with the first spline, and / or The running gear includes a second rotating ball spline sleeve assembly, the second rotating ball spline sleeve assembly including a second outer flange and a second ball spline housing, the second outer flange being fixedly connected to the first vehicle frame, the second shaft including a second spline shaft, a second spline being provided on the second spline shaft, and the second ball spline housing cooperating with the second spline.

[0010] In some embodiments, the chassis further includes a first extension / retraction drive mechanism in driving connection with the climbing wheel and configured to drive the climbing wheel to effect reciprocating lateral movement of the chassis.

[0011] In some embodiments, the first extension / retraction drive mechanism comprises: a screw attached to the first vehicle frame; a moving component that is threadedly engaged with the screw, and the first shaft is attached to the moving component; Includes:

[0012] In some embodiments, the chassis further includes a second extension / retraction drive mechanism in driving connection with the running wheels and configured to drive the running wheels to effect reciprocating movement of the chassis in a lateral direction.

[0013] In some embodiments, the chassis comprises: a first support wheel attached to the first shaft; a third shaft attached to the first vehicle frame and spaced apart from and parallel to the first shaft and the second shaft; a second support wheel mounted on a third shaft, the third shaft being positioned in communication with the first shaft such that the second support wheel is fixed relative to the first support wheel in a lateral direction of the chassis; and Further includes:

[0014] In some embodiments, the axes of the first shaft, the second shaft, and the third shaft lie in different planes.

[0015] In some embodiments , th The second shaft and the third shaft are positioned below the first shaft.

[0016] In some embodiments, the first shaft, the second shaft, and the third shaft are movably mounted to the first vehicle frame laterally of the chassis.

[0017] In some embodiments, the chassis further includes a second extension / retract drive mechanism and a second vehicle frame, the second extension / retract drive mechanism being drivingly connected to the running wheels and configured to drive the running wheels to effect laterally reciprocating movement of the chassis, the second vehicle frame being rotatably and axially stationary mounted on the second shaft for laterally moving with the running wheels relative to the first vehicle frame, a third shaft passing through the second vehicle frame, and a second support wheel being mounted laterally outward of the second vehicle frame.

[0018] A second aspect of the present disclosure provides a warehousing logistics vehicle including the chassis of the first aspect of the present disclosure.

[0019] A third aspect of the present disclosure is Horizontal rails and A vertical rail; A warehousing logistics vehicle according to a second aspect of the present disclosure, wherein the warehousing logistics vehicle has a running state in which the running wheels of the warehousing logistics vehicle run along a horizontal rail, and an ascending / descending state in which the climbing wheels of the warehousing logistics vehicle ascend / descend along a vertical rail; The Company provides warehousing and logistics systems, including:

[0020] The chassis based on the warehousing logistics vehicle provided in the present disclosure uses a structure in which the climbing wheel and the running wheel are non-coaxial, which helps to improve the force-bearing condition of the first shaft.

[0021] The warehousing logistics vehicles and warehousing logistics systems provided in the present disclosure have the same advantages as the chassis for warehousing logistics vehicles provided in the present disclosure.

[0022] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

[0023] The drawings set forth herein are used to provide a further understanding of the present disclosure and form a part of this application, and the illustrative embodiments of the present disclosure and the description thereof are intended to illustrate, rather than unduly limit, the disclosure. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic structural diagram of a warehousing logistics system in an embodiment of the present disclosure. [Figure 2] FIG. 1 is a schematic structural diagram of a warehousing logistics vehicle in an embodiment of the present disclosure. [Figure 3] FIG. 3 is a schematic structural diagram of the warehousing logistics vehicle shown in FIG. 2 along the direction AA. [Figure 4]FIG. 3 is a schematic structural diagram of the warehousing logistics vehicle shown in FIG. 2 along direction BB. [Figure 5] FIG. 3 is a partial cross-sectional structural view of the warehouse storage logistics vehicle shown in FIG. 2. [Figure 6] FIG. 3 is a partial cross-sectional structural view of the warehouse storage logistics vehicle shown in FIG. 2. [Figure 7] FIG. 3 is a partial cross-sectional structural view of the warehouse storage logistics vehicle shown in FIG. 2. [Figure 8] FIG. 2 is a schematic structural diagram of the warehousing logistics system shown in FIG. 1, in which the warehousing logistics vehicle is in a running state. [Figure 9] FIG. 2 is a schematic structural diagram of the warehousing logistics system shown in FIG. 1, in which the warehousing logistics vehicle is switched from a running state to a rising / lowering state. [Figure 10] 3 is a schematic structural diagram of the warehouse storage logistics vehicle shown in FIG. 2 in a running state and an ascending / descending state along the AA direction. [Figure 11] FIG. 2 is a schematic structural diagram of the warehousing logistics system shown in FIG. 1, in which the warehousing logistics vehicle is in a raising / lowering state. DETAILED DESCRIPTION OF THE INVENTION

[0025] The technical solutions in the embodiments of the present disclosure are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part, not all, of the embodiments of the present disclosure. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as any limitation on the present disclosure and its application or use. All other embodiments obtained by those skilled in the art based on the embodiments in the present disclosure without creative work shall fall within the protection scope of the present disclosure.

[0026] Unless otherwise specified, the relative arrangement of components and steps, formulas, and numerical values ​​described in these embodiments does not limit the scope of the present disclosure. Furthermore, it should be understood that for ease of explanation, the sizes of various parts shown in the drawings are not drawn to scale. Techniques, methods, and apparatus known to those skilled in the art may not be described in detail; however, where appropriate, the techniques, methods, and apparatus should be considered part of the attached specification. In all examples shown and described herein, any specific values ​​should be construed as merely illustrative and not limiting. Thus, other examples of exemplary embodiments may have different values. Note that like reference numerals and letters indicate like items in the following drawings, so once an item is defined in one drawing, it need not be further described in subsequent drawings.

[0027] It should be understood that in describing the present disclosure, the use of terms such as "first" and "second" to define parts and components is merely for the convenience of distinguishing corresponding parts and components. Unless otherwise specified, the above terms do not have any special meaning and therefore cannot be construed as a limitation on the protection scope of the present disclosure.

[0028] In describing the present disclosure, the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "lateral," "longitudinal," "vertical," "horizontal," "top," and "bottom" are generally orientations or positional relationships shown based on the drawings, and are merely for the convenience of describing and simplifying the explanation of the present disclosure; unless stated to the contrary, such terms do not indicate or imply that the devices or elements shown have a particular orientation or must be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the scope of protection of the present disclosure; and it should be understood that the orientation terms "inner" and "outer" refer to the inside and outside relative to the contours of each component itself.

[0029] When a prior-art warehouse logistics vehicle is climbing, the length of the cantilevered portion of the spline shaft is relatively large. During climbing, the spline shaft's load-bearing conditions are relatively complex. The weight of the vehicle body, the forces caused by the eccentric weight, and the torque transmitting the motor's power all act on the spline shaft, causing cyclic stress throughout the cantilevered shaft as the spline shaft rotates. Therefore, the diameter of the spline shaft must be large. A large-diameter rotary ball spline shaft assembly is expensive, increasing the overall cost of the vehicle. When a warehouse logistics vehicle is climbing, the climbing wheel and support wheel support the rearward and forward forces caused by the eccentric weight, respectively. Due to the force action principle and geometric relationship, the climbing wheel and support wheel must be spaced apart by a certain distance in the vertical direction. Because the climbing wheel and running wheel are coaxial, with the climbing wheel having a small outer diameter and the running wheel having a large outer diameter, the height of the vehicle body must be increased to maintain a certain vertical distance between the climbing wheel and the support wheel. The increased height of the vehicle body results in a larger stack height of the cargo racks, which affects storage density.

[0030] To improve upon prior art warehousing logistics vehicles, embodiments of the present disclosure provide a warehousing logistics vehicle and a chassis therefor, as well as a warehousing logistics system including the warehousing logistics vehicle.

[0031] In the following description, the term "forward" refers to the front direction of the warehousing logistics vehicle, the term "rearward" refers to the tail direction thereof, and the terms "left" and "right" refer to the left-right direction when facing forward. The left-right directions are the same as in Figures 2 and 3. The term "longitudinal direction" refers to the front-to-rear direction of the warehousing logistics vehicle, and the term "lateral direction" refers to the left-to-right direction of the warehousing logistics vehicle.

[0032] As shown in FIGS. 1 to 11, the embodiment of the present disclosure includes: 1st a vehicle frame 11; 1st A chassis 1 for a warehousing logistics vehicle is provided, comprising a running gear attached to a vehicle frame 11. The running gear comprises a first shaft 14, a climbing wheel 15, a second shaft 25, and a running wheel 27.

[0033] The first shaft 14 is attached to the first vehicle frame 11. The climbing wheel 15 is configured to raise and lower the chassis 1 and is attached to the first shaft 14. The second shaft 25 is attached to the first vehicle frame 11 and is arranged parallel to and spaced apart from the first shaft 14. The traveling wheel 27 is configured to cause the chassis 1 to travel and is attached to the second shaft 25.

[0034] The warehousing logistics vehicle V of the embodiment of the present disclosure uses a structure in which the climbing wheels 15 and the running wheels 27 are non-coaxial, which helps to improve the load-bearing condition of the first shaft 14. Furthermore, it helps to reduce the diameter of the first shaft 14, thereby helping to reduce the overall cost of the vehicle on the one hand and the weight of the entire vehicle on the other hand.

[0035] 2, in some embodiments, the chassis 1 further includes a traveling drive mechanism. The traveling drive mechanism is drivingly connected to the first shaft 14 and the second shaft 25 and drives the first shaft 14 and the second shaft 25 to rotate. The traveling drive mechanism includes, for example, a drive motor and a reducer.

[0036] In some embodiments, as shown in Figure 2, the chassis 1 further includes a first extension / retraction drive mechanism that is drivingly connected to the climbing wheel 15 and configured to drive the climbing wheel 15 to cause the chassis 1 to perform a reciprocating movement in the lateral direction.

[0037] The first extension / retraction drive mechanism includes, for example, a screw 21 and a moving component 20. The screw 21 is attached to the first vehicle frame 11. The moving component 20 is threadedly engaged with the screw 21, and the first shaft 14 is attached to the moving component 20. When the screw 21 rotates, the moving component 20 can be driven to move in the axial direction of the screw 21, thereby moving the first shaft 14 and therefore the climbing wheel 15. In one embodiment not shown, the first extension / retraction drive mechanism includes, for example, a linkage mechanism, a gear rack mechanism, etc.

[0038] In some embodiments, the chassis 1 further includes a second extension / retraction drive mechanism drivingly connected to the running wheels 27 and configured to drive the running wheels 27 to cause the chassis 1 to reciprocate laterally.

[0039] The second extension / retraction drive mechanism includes, for example, a linear motor or a combination of a rotary motor and a transmission.

[0040] 2 , the chassis 1 further includes a first support wheel 16, a third shaft 18, and a second support wheel 19. The first support wheel 16 is attached to the first shaft 14. The third shaft 18 is attached to the vehicle frame 11 and is spaced apart from and parallel to the first shaft 14 and the second shaft 25. The second support wheel 19 is attached to the third shaft 18. The third shaft 18 is positioned in conjunction with the first shaft 14 such that the second support wheel 19 is fixed relative to the first support wheel 16 in the lateral direction of the chassis 1.

[0041] In some embodiments, the chassis 1 further includes a second vehicle frame 26 that is rotatably and axially stationary mounted on a second shaft 25 for lateral movement with running wheels 27 relative to the first vehicle frame 11. A third shaft 18 passes through the second vehicle frame 26, and second support wheels 19 are mounted laterally outward of the second vehicle frame 26.

[0042] A warehousing logistics vehicle V of an embodiment of the present disclosure includes a chassis 1 of an embodiment of the present disclosure.

[0043] The warehousing logistics system of the presently disclosed embodiment includes a horizontal rail 3, a vertical rail 4, and a warehousing logistics vehicle V. The warehousing logistics vehicle V has a running state and a rising / lowering state. In the running state, the running wheels 27 of the warehousing logistics vehicle V run along the horizontal rail 3. In the rising / lowering state, the climbing wheels 15 of the warehousing logistics vehicle V rise / lower along the vertical rail 4.

[0044] The warehousing logistics vehicle V of the disclosed embodiments and the warehousing logistics system of the disclosed embodiments have the same advantages as the chassis for the warehousing logistics vehicle of the disclosed embodiments.

[0045] A warehousing logistics vehicle V and a chassis 1 therefor, as well as a warehousing logistics system including the warehousing logistics vehicle V, according to an embodiment of the present disclosure, are further described below in conjunction with Figures 1 to 11.

[0046] 1, the warehousing logistics system of an embodiment of the present disclosure includes horizontal rails 3, vertical rails 4, and warehousing logistics vehicles V. The numbers of the horizontal rails 3, vertical rails 4, and warehousing logistics vehicles V can all be configured as needed.

[0047] As shown in FIG. 2, the warehousing logistics vehicle V mainly includes a chassis 1 and a superstructure 2. The chassis 1 has the functions of running on the ground, running on horizontal rails, and climbing vertically. The front end H of the warehousing logistics vehicle V is located at one end (the left end in FIG. 2) of the chassis 1. The power supply, power and transmission mechanism, control unit, and navigation unit of the warehousing logistics vehicle V are located at the front end H. The superstructure 2 functions as a place where the cargo box B is picked up and where the cargo box B is placed. The superstructure 2 is located at the other end (the right end in FIG. 2) of the chassis 1.

[0048] As shown in Figures 3 to 11, the chassis 1 includes a vehicle frame 11 and a running gear attached to the vehicle frame 11. The running gear of the chassis 1 has a symmetrical structure including two running units located on the left and right sides of the chassis 1 and arranged symmetrically with respect to the longitudinal axis of the chassis 1. As shown in Figure 2, the running unit located on the left side will be described below as an example. The running unit located on the right side is the same as the running unit on the left side in terms of its structure, component functions, and operating process and principle, and will not be described separately.

[0049] The running unit includes a first shaft 14, a climbing wheel 15, a second shaft 25, and a running wheel 27. The first shaft 14 is attached to the first vehicle frame 11. The climbing wheel 15 is configured to raise and lower the chassis 1 and is attached to the first shaft 14. The second shaft 25 is attached to the first vehicle frame 11 and is arranged parallel to and spaced apart from the first shaft 14. The running wheel 27 is configured to cause the chassis 1 to run and is attached to the second shaft 25.

[0050] The first shaft 14 is configured as a first spline shaft provided with a first spline. In this embodiment, the second shaft 25 is configured as a second spline shaft provided with a second spline. The climbing wheel 15 includes a climbing gear.

[0051] The chassis 1 further includes a traveling drive mechanism. The traveling drive mechanism is drivingly connected to the first shaft 14 and the second shaft 25, and drives the first shaft 14 and the second shaft 25 to rotate. The traveling drive mechanism includes a traveling drive motor (not shown) and a reducer 12. The first shaft 14 and the second shaft 25 are driven to rotate by the reducer 12.

[0052] As shown in FIG. 2 , the chassis 1 further includes a first extension / retraction drive mechanism drivingly connected to the climbing wheel 15. The first extension / retraction drive mechanism is configured to drive the climbing wheel 15 to perform a reciprocating movement in the lateral direction of the chassis 1. The first extension / retraction drive mechanism includes a screw 21 and a moving component 20. The screw 21 is attached to the first vehicle frame 11. The moving component 20 is threadedly engaged with the screw 21, and the first shaft 14 is attached to the moving component 20. When the screw 21 rotates, the moving component 20 can be driven to move in the axial direction of the screw 21, thereby moving the first shaft 14 and therefore the climbing wheel 15. The screw 21 can be driven, for example, by a rotary motor.

[0053] The chassis 1 further includes a second extension / retraction drive mechanism in driving connection with the traveling wheels 27. The second extension / retraction drive mechanism is configured to drive the traveling wheels 27 to cause the chassis 1 to perform a reciprocating movement in the lateral direction.

[0054] The second extension / retraction drive mechanism may include, for example, a linear motor. The linear motor may push or pull the traveling wheel 27 to cause it to reciprocate in its axial direction. Alternatively, the second extension / retraction drive mechanism may be a composite mechanism including a rotary motor and a transmission unit disposed between the rotary motor and the traveling wheel 27. The rotary motor operates the transmission unit, thereby causing the traveling wheel 27 to reciprocate in its axial direction.

[0055] As shown in FIG. 2 , the chassis 1 further includes a first support wheel 16, a third shaft 18, and a second support wheel 19. The first support wheel 16 is attached to the first shaft 14. The third shaft 18 is attached to the vehicle frame 11 and is spaced apart from and parallel to the first shaft 14 and the second shaft 25. The second support wheel 19 is attached to the third shaft 18. The second support wheel 19 is positioned laterally of the chassis 1 relative to the first support wheel 16. is fixed to The first support wheel 16 is disposed in connection with the first support wheel 16 so as to

[0056] The first shaft 14 , the second shaft 25 and the third shaft 18 are mounted to the first vehicle frame 11 so as to be movable laterally of the chassis 1 .

[0057] As shown in Figure 5, the traveling drive mechanism includes a reducer 12 and a reducer spline housing 121. The reducer spline housing 121 is attached between an output shaft 122 of the reducer 12 and the first shaft 14. The reducer 12 is fixedly attached to the outside in the lateral direction of the first vehicle frame 11, and the output shaft 122 can drive and rotate the reducer spline housing 121. A first rotating ball spline sleeve assembly 13 is attached to the inside in the lateral direction of the first vehicle frame 11 by its first outer flange 131, and is coaxial with the output shaft 122 of the reducer 12.

[0058] The first shaft 14 passes through the first rotating ball spline sleeve assembly 13, the output shaft 122 of the reducer 12, and the reducer spline housing 121 in that order. Both the reducer spline housing 121 and the first ball spline housing 132 of the first rotating ball spline sleeve assembly 13 cooperate with the first spline on the first shaft 14 so that the reducer 12 can rotate the first shaft 14 and the first ball spline housing 132 via the reducer spline housing 121. Furthermore, the first shaft 14 can move axially relative to the reducer 12 and the first rotating ball spline sleeve assembly 13. A climbing wheel 15 and a first support wheel 16 are attached to an end of the first shaft 14 near the outside of the vehicle body.

[0059] The running section further includes a guide sleeve 17. The third shaft 18 and the guide sleeve 17 are coaxially attached to the lower part of the first vehicle frame 11, parallel to the first shaft 14 and at a certain distance below the first shaft 14. The guide sleeve 17 is fixed to the first vehicle frame 11, and the third shaft 18 can move axially relative to the guide sleeve 17. The end of the third shaft 18 closest to the lateral outer side passes through a movable second vehicle frame 26, and a second support wheel 19 is installed thereon. The third shaft 18 does not contact the second vehicle frame 26 or slidably cooperates with the second vehicle frame 26 in the axial direction of the third shaft 18. The other ends of the first shaft 14 and the third shaft 18 are connected to a moving element 20. The moving element 20 can be a plate member, a rod member, or the like.

[0060] The screw 21 is located in the center of the vehicle body and has threads for left-hand and right-hand rotation. Driven by the screw 21, the two left and right moving components 20 can move symmetrically in the lateral direction of the chassis 1, thereby simultaneously moving the first shaft 14, the climbing wheel 15, the first support wheel 16, the third shaft 18 and the second support wheel 19 in the lateral direction of the chassis 1.

[0061] The axes of the first shaft 14, the second shaft 25 and the third shaft 18 are located in different planes. . The second shaft 25 and the third shaft 18 are positioned below the first shaft 14. As shown in FIG. 2 , the second shaft 25 is parallel to the first shaft 14 and is located a certain distance below the first shaft 14, but is not in the plane formed by the first shaft 14 and the third shaft 18. The second outer flange 241 of the second rotating ball spline sleeve assembly 24 is fixedly attached to the first vehicle frame 11, and the second shaft 25 passes through the second rotating ball spline sleeve assembly 24, and its second spline can cooperate with the second ball spline housing 242 of the second rotating ball spline sleeve assembly 24, so that the second shaft 25 rotates synchronously with the second ball spline housing 242.

[0062] As shown in FIG. 4, one end of the second shaft 25 is connected to a second vehicle frame 26 by a bearing 28, and a running wheel 27 is installed thereon.

[0063] A transmission wheel 22 is attached to the laterally inner end of each of the second ball spline housing 242 of the second rotating ball spline sleeve assembly 24 and the first ball spline housing 132 of the first rotating ball spline sleeve assembly 13. The two transmission wheels 22 are attached to the first shaft 14 and the second shaft 25, respectively, and can rotate together with the first shaft 14 and the second shaft 25, respectively. A transmission belt 23 connects the two transmission wheels 22, so that rotation of the first shaft 14 can rotate the second shaft 25 and the running wheel 27 via the first ball spline housing 132, the transmission wheel 22 on the first shaft 14, the transmission belt 23, and the transmission wheel 22 on the second shaft 25.

[0064] The second vehicle frame 26, bearing 28, second shaft 25, and traveling wheel 27 can move laterally simultaneously under the drive of a second extension / retraction drive mechanism. The second extension / retraction drive mechanism includes, for example, a rotary motor and a transmission mechanism. The transmission mechanism includes, for example, a screw-nut transmission pair, a linkage mechanism, a gear-rod transmission pair, a cam-lever transmission pair, etc.

[0065] 8 shows the state of the warehousing logistics vehicle V running normally on the horizontal rail 3. In this case, the warehousing logistics vehicle V is in its running state. The second vehicle frame 26, bearing 28, second shaft 25 and running wheel 27 are in an extended position away from the first vehicle frame 11, and the running wheel 27 is on the upper surface of the horizontal rail 3. The first shaft 14, climbing wheel 15, first support wheel 16, third shaft 18 and second support wheel 19 are in a retracted position toward the first vehicle frame 11, allowing the warehousing logistics vehicle V to run on the horizontal rail 3 at high speed.

[0066] As shown in Figure 9, if a warehouse logistics vehicle V climbingWhen in this state, the first shaft 14, the climbing wheel 15, the first support wheel 16, the third shaft 18 and the second support wheel 19 are simultaneously extended away from the first vehicle frame 11 to enter an extended position, the gear teeth of the climbing wheel 15 engage with the rack 41 of the vertical rail 4, the first support wheel 16 and the second support wheel 19 are positioned between the limiting strips 42 of the vertical rail 4, and the climbing wheel 15 rotates so that the warehousing logistics vehicle V can rise within a certain range. As shown in FIG. 11 , after the warehousing logistics vehicle V rises to a low height, the second vehicle frame 26, bearing 28, second shaft 25 and running wheel 27 driven by the second extension / retraction drive mechanism move toward the side closer to the first vehicle frame 11 to enter a retracted position, so that the horizontal rail 3 can be avoided when the warehousing logistics vehicle V moves up and down, and the warehousing logistics vehicle V is switched to a rising / lowering state so that the warehousing logistics vehicle V can rise / lower all the way along the vertical rail 4.

[0067] As shown in FIG. 10 , the first shaft 14, whose load-bearing condition is the most complex, reaches its maximum cantilever length when in the ascending / descending state, which is a larger extension / retraction stroke a of the first shaft 14 than its cantilever length when in the traveling state. In the prior art, the extension and retraction of the climbing wheel and traveling wheel must be realized on the same axis, so the splined shaft has a larger cantilever length when in the ascending / descending state than when in the traveling state. Therefore, the non-coaxial structure of the climbing wheel 15 and traveling wheel 27 of the warehouse storage logistics vehicle V of the present disclosure helps improve the load-bearing condition of the first shaft 14 and allows for a reduced diameter of the first shaft 14, thereby reducing the overall cost and weight of the vehicle.

[0068] The structure in which the climbing wheels 15 and the running wheels 27 are configured non-coaxially also serves to reduce the height of the first shaft 14 and the third shaft 18 of the warehousing logistics vehicle V while maintaining a fixed vertical distance between the first shaft 14 and the third shaft 18, thereby reducing the overall height of the vehicle and offering the possibility of ensuring storage density due to the reduced layer height of the cargo racks.

[0069] In addition, the first shaft 14 and the third shaft 18 can be closer to the center of gravity of the warehousing logistics vehicle V (between the running wheels 27 and the tail T), thereby reducing the forward and rearward acting forces caused by eccentric weight on the climbing wheels 15 and the first support wheels 16 and second support wheels 19.

[0070] Combining the reducer 12 of the traveling drive mechanism with the reducer spline housing 121 helps to shift its position outward. This, combined with the non-coaxial structure of the traveling wheels 27 and the climbing wheels 15, achieves that the left and right extension and retraction of the second vehicle frame 26 and the traveling wheels 27 do not affect the cantilever length of the first shaft 14, and the cantilever length of the first shaft 14 is reduced when the warehousing logistics vehicle V ascends / descends, which helps to further improve the load-bearing conditions of the first shaft 14.

[0071] The space above the superstructure 2 is fully used to position the climbing wheel 15 and the first support wheel 16, which reduces the longitudinal distance between the superstructure 2 and the climbing wheel 15 and helps to shorten the overall length of the vehicle.

[0072] Finally, it should be noted that the above embodiments are only used to explain, not to limit, the technical solutions of the present disclosure. Although the present disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can be further made to the specific implementations in the present disclosure or equivalent substitutions can be made to some of its technical features, and such modifications and equivalent substitutions should be encompassed within the scope of the technical solutions sought to be protected in the present disclosure. [Explanation of symbols]

[0073] 1 chassis 2 Superstructure 3 horizontal rails 4 vertical rails 11 First vehicle frame 12 Reducer 13 First rotating ball spline sleeve assembly 14 First Shaft 15 Climbing Wheels 16 First support wheel 17 Guide sleeve 18 Third Shaft 19 Second support wheel 20 Movement Components 21 Screw 22 Transmission Wheel 23 Transmission Belt 24 Second Rotating Ball Spline Sleeve Assembly 25 Second Shaft 26 Second vehicle frame 27 Running Wheel 28 bearings 41 racks 42 Restriction Strip 121 Reducer spline housing 122 output shaft 131 first outer flange 132 first ball spline housing 241 Second outer flange 242 Second ball spline housing a Extension / retraction stroke B Cargo Box H first T-tail V Warehouse Logistics Vehicles AA direction BB direction

Claims

1. A chassis for a warehousing logistics vehicle, comprising a first vehicle frame (11) and a running gear attached to the first vehicle frame (11), wherein the running gear comprises: a first shaft (14) attached to the first vehicle frame (11); a climbing wheel (15) attached to the first shaft (14) for raising and lowering the chassis (1); a second shaft (25) attached to the first vehicle frame (11) and arranged parallel to and spaced apart from the first shaft (14); a traveling wheel (27) attached to the second shaft (25) for moving the chassis (1); a first support wheel (16) attached to the first shaft (14); a third shaft (18) attached to the first vehicle frame (11) and arranged spaced apart from and parallel to the first shaft (14) and the second shaft (25); a second support wheel (19) mounted on the third shaft (18), the third shaft (18) being arranged in conjunction with the first shaft (14) such that the second support wheel (19) is fixed relative to the first support wheel (16) in the lateral direction of the chassis (1); A chassis comprising:

2. 2. The chassis of claim 1, further comprising a traveling drive mechanism drivingly connected to the first shaft (14) and the second shaft (25) to drive the first shaft (14) and the second shaft (25) to rotate.

3. The traveling drive mechanism includes a reducer (12) and a reducer spline housing (121), and an output shaft (122) of the reducer (12) is sleeved on the outside of the reducer spline housing (121); the first shaft (14) comprises a first spline shaft, a first spline is provided on the first spline shaft, and the reducer spline housing (121) cooperates with the first spline; The chassis of claim 2.

4. the running gear comprises a first rotating ball spline sleeve assembly (13), the first rotating ball spline sleeve assembly (13) comprising a first outer flange (131) and a first ball spline housing (132), the first outer flange (131) being fixedly connected to the first vehicle frame (11); the first shaft (14) comprising a first spline shaft, a first spline being provided on the first spline shaft, the first ball spline housing (132) cooperating with the first spline; and / or the running gear comprises a second rotating ball spline sleeve assembly (24), the second rotating ball spline sleeve assembly (24) comprising a second outer flange (241) and a second ball spline housing (242), the second outer flange (241) being fixedly connected to the first vehicle frame (11), the second shaft (25) comprising a second spline shaft, a second spline being provided on the second spline shaft, and the second ball spline housing (242) cooperating with the second spline; 4. A chassis according to any one of claims 1 to 3.

5. 5. The chassis according to claim 1, further comprising a first extension / retraction drive mechanism in driving connection with the climbing wheel (15) and configured to drive the climbing wheel (15) to perform a reciprocating movement in the lateral direction of the chassis (1).

6. The first extension / retraction drive mechanism comprises: a screw (21) attached to the first vehicle frame (11); a moving component (20) that is threadedly engaged with the screw (21), and the first shaft (14) is attached to the moving component (20); The chassis of claim 5 , comprising:

7. 7. The chassis according to any one of claims 1 to 6, further comprising a second extension / retraction drive mechanism drivingly connected to the running wheels (27) and configured to drive the running wheels (27) to perform a reciprocating movement in the lateral direction of the chassis (1).

8. 8. The chassis according to any one of claims 1 to 7, wherein the axes of the first shaft (14), the second shaft (25) and the third shaft (18) are located in different planes.

9. 9. The chassis according to claim 7 or 8, wherein the second shaft (25) and the third shaft (18) are located below the first shaft (14).

10. 10. The chassis according to any one of claims 7 to 9, wherein the first shaft (14), the second shaft (25) and the third shaft (18) are movably mounted on the first vehicle frame (11) in a lateral direction of the chassis (1).

11. 11. The chassis of claim 7, further comprising a second extension / retract drive mechanism and a second vehicle frame (26), the second extension / retract drive mechanism being drivingly connected to the running wheels (27) and configured to drive the running wheels (27) to effect laterally reciprocating movement of the chassis (1), the second vehicle frame (26) being rotatably and axially stationary mounted on the second shaft (25) so as to move laterally together with the running wheels (27) relative to the first vehicle frame (11), the third shaft (18) passing through the second vehicle frame (26), and the second support wheels (19) being mounted laterally outward of the second vehicle frame (26).

12. A warehousing logistics vehicle comprising a chassis (1) according to any one of claims 1 to 11.

13. Horizontal rail (3) and Vertical rails (4) and 13. A warehousing logistics vehicle (V) according to claim 12, wherein the warehousing logistics vehicle (V) has a running state in which the running wheels (27) of the warehousing logistics vehicle (V) run along the horizontal rails (3) and a rising / lowering state in which the climbing wheels (15) of the warehousing logistics vehicle (V) rise / lower along the vertical rails (4). A warehouse storage logistics system comprising:

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