Stair-climbing cart

Abstract

A stair-climbing cart. The stair-climbing cart comprises an object-carrying mechanism, a stair-climbing mechanism (2100) and first support wheel assemblies (2200), wherein the object-carrying mechanism comprises an object-carrying platform (1100), one end of the object-carrying platform (1100) being hinged to the stair-climbing mechanism (2100); the inclination of the object-carrying platform (1100) can be adjusted on the stair-climbing mechanism (2100); each first support wheel assembly (2200) comprises a first wheel (2201) and a first support leg (2202), each first wheel (2201) being arranged at the tail end of each first support leg (2202), and the first support legs (2202) being arranged on the stair-climbing mechanism (2100); and the first support legs (2202) are configured to extend or retract the first wheels (2201) from the bottom of the stair-climbing mechanism (2100), and the first wheels (2201) are in contact with the ground instead of the stair-climbing mechanism (2100), so as to support the stair-climbing vehicle to travel on the flat ground. The first wheels (2201) can protrude from the bottom of the stair-climbing mechanism (2100) prior to the first support legs (2202), thereby preventing the first support legs (2202) from touching the ground first and thus hindering the rolling contact between the first wheels (2201) and the ground, and ensuring that the first wheels replace caterpillar tracks to play a role in support and traveling.

Description

A stair climbing vehicle TECHNICAL FIELD

[0001] The present application relates to the technical field of stair climbing transport equipment, and in particular to a stair climbing vehicle. BACKGROUND

[0002] In the group meal industry such as schools and enterprises, meal boxes or meal barrels sometimes need to go up the stairs. If manpower is used for transport, it is very laborious and dangerous. Therefore, a stair climbing vehicle is used instead of manpower. A common stair climbing vehicle is a track type stair climbing machine. When the stair climbing vehicle switches from going up or down the stairs to walking on the ground, the track needs to be suspended, and the roller needs to be switched to walk on the ground, so as to facilitate the user to pull or push the stair climbing vehicle.

[0003] However, the existing stair climbing vehicle has the following problems: when the stair climbing vehicle goes up or down the stairs, the goods are easy to fall; when the roller is switched to walk, the roller cannot replace the track to contact the ground; the load capacity of the stair climbing vehicle is limited, and the transport efficiency is low; the center of the stair climbing vehicle is unstable, and it is easy to tip over when walking on the ground.

[0004] Content of the utility model

[0005] To solve at least one of the above technical problems, the present application provides a stair climbing vehicle, which adopts the following technical solutions.

[0006] The stair climbing vehicle provided by the present application comprises a load carrying mechanism, a stair climbing mechanism and a first support wheel assembly. The load carrying mechanism comprises a load carrying table. One end of the load carrying table is hinged to the stair climbing mechanism, and the load carrying table can adjust the inclination on the stair climbing mechanism. The first support wheel assembly comprises a first roller and a first support leg. The first roller is arranged at the end of the first support leg, and the first support leg is arranged on the stair climbing mechanism. The first support leg is used to extend or retract the first roller from the bottom of the stair climbing mechanism, and the first roller can protrude from the bottom of the stair climbing mechanism before the first support leg.

[0007] In some embodiments of the present application, the stair climbing vehicle comprises a first driving assembly arranged on the stair climbing mechanism. The first support leg is hinged to the stair climbing mechanism, and the first driving assembly drives the first support leg to rotate on the stair climbing mechanism.

[0008] In some embodiments of the present application, the first support leg has an upward arch shape.

[0009] In some embodiments of the present application, the first support wheel assembly is arranged in two, and the stair climbing mechanism is located between the two first support wheel assemblies.

[0010] In some embodiments of the present application, the stair climbing mechanism comprises a track, the track comprises a climbing section and a guide section, the guide section is inclined upward relative to the climbing section, and the first roller is close to the corner between the guide section and the climbing section after the first roller is retracted from the bottom of the stair climbing mechanism.

[0011] In some embodiments of the present application, the object carrying mechanism comprises a support plate, at least one side of the object carrying platform is provided with the support plate, the support plate is movable, and the support plate is used to increase the carrying area of the object carrying platform.

[0012] In some embodiments of the present application, the support plate is movably connected to the object carrying platform, and the support plate is movable in the direction parallel to the carrying surface of the object carrying platform.

[0013] In some embodiments of the present application, the support plate is movably connected to the object carrying platform, and the support plate is movable in the direction parallel to the carrying surface of the object carrying platform.

[0014] In some embodiments of the present application, the guide structure is provided as a guide rod, the lower surface of the object carrying platform is provided with a guide groove, the guide structure penetrates the guide groove and is movable in the guide groove.

[0015] In some embodiments of the present application, the object carrying mechanism comprises a locking piece, the locking piece penetrates the side wall of the guide groove, and the locking piece fixes the guide structure by pressing the side wall of the guide structure.

[0016] The present application has at least the following beneficial effects: the stair climbing vehicle is designed to adjust the inclination of the object carrying platform relative to the stair climbing mechanism, when the stair climbing mechanism climbs up and down the stairs in an inclined state, the object carrying platform is adjusted to be at least horizontal, so as to avoid the falling of the objects. The first support wheel assembly can be extended from the bottom of the stair climbing mechanism, so that the first roller replaces the stair climbing mechanism to contact the ground, thereby realizing the support and walking of the stair climbing vehicle. And the first roller is extended before the first support foot, so as to prevent the first support foot from contacting the ground first and hindering the rolling contact of the first roller with the ground, and to ensure that the first roller replaces the track to play a supporting and walking role. The present application can be widely applied in the field of carrying equipment.

[0017] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further illustrated below in combination with the drawings and embodiments. It should be noted that the embodiments embodied in the following drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application.

[0019] Fig. 1 is a structural diagram of a stair climbing vehicle.

[0020] Fig. 2 is a structural diagram of a stair climbing vehicle.

[0021] Fig. 3 is a structural diagram of a stair climbing mechanism and a first support wheel assembly.

[0022] Fig. 4 is a structural diagram of a stage.

[0023] Fig. 4 is a structural diagram of a stage.

[0023] Fig. 4 is a structural diagram of a stage. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar notations represent the same or similar elements throughout the several views. The embodiments described below are exemplary only, and are not to be understood as limiting the present application.

[0025] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "middle", "lengthwise", "transversely", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If the first is described, the first is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0027] In the description of the application, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example: it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0028] In the description of the application, if the description of the terms "as an embodiment", "an embodiment", "some examples", "some embodiments", "illustrative embodiments", "example", "specific example", "some examples" appears, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The present application relates to a stair climbing vehicle, which can realize climbing stairs, descending stairs and walking on flat ground, and the stair climbing vehicle can carry objects. Specifically, the stair climbing vehicle comprises a carrying mechanism and a stair climbing mechanism 2100, the carrying mechanism is arranged on the stair climbing mechanism 2100, the stair climbing mechanism 2100 realizes climbing stairs or descending stairs, and the carrying mechanism is used for carrying objects.

[0030] It can be understood that the carrying mechanism comprises a carrying table 1100, and the objects are placed on the upper surface of the carrying table 1100. In combination with FIG. 1 and FIG. 2, one end of the carrying table 1100 is hinged to the stair climbing mechanism 2100, and the carrying table 1100 can adjust the inclination on the stair climbing mechanism 2100. When the stair climbing mechanism 2100 climbs or descends stairs, the stair climbing mechanism 2100 is in an inclined state, at this time, the carrying table 1100 adjusts the angle to prevent the objects on the carrying table 1100 from falling or sliding.

[0031] In combination with FIG. 1 and FIG. 2, the stair climbing vehicle comprises a first support wheel assembly 2200, which is arranged on the stair climbing mechanism 2100. When the stair climbing vehicle is running on the ground after climbing up or down the stairs, the first support wheel assembly 2200 contacts the ground. It can be understood that in combination with FIG. 3, the first support wheel assembly 2200 comprises a first roller 2201 and a first support leg 2202, the first roller 2201 is arranged as a universal wheel, the first roller 2201 is arranged at the end of the first support leg 2202, and the first support leg 2202 is arranged on the stair climbing mechanism 2100. The first support leg 2202 can drive the first roller 2201 to move, so that the first support leg 2202 extends or retracts the first roller 2201 from the bottom of the stair climbing mechanism 2100.

[0032] Further, in combination with FIG. 2, the stair climbing vehicle comprises a second support wheel assembly 1300, which is arranged on the loading platform 1100. When the stair climbing vehicle is running on the ground, the first support wheel assembly 2200 and the second support wheel assembly 1300 support the stair climbing vehicle, and the stair climbing mechanism 2100 is separated from the ground, and the user pushes or pulls the stair climbing vehicle to realize running on the ground. It can be understood that in combination with FIG. 4, the second support wheel assembly 1300 comprises a second roller 1301 and a second support leg 1302, the second roller 1301 is arranged as a universal wheel, the second roller 1301 is arranged at the end of the second support leg 1302, the second support leg 1302 is arranged on the loading platform 1100, and the second support leg 1302 is fixedly connected with the loading platform 1100.

[0033] When the stair climbing vehicle climbs up or down the stairs, the stair climbing mechanism 2100 is inclined and contacts the stairs, and the first support wheel assembly 2200 and the second support wheel assembly 1300 are at a position higher than the bottom of the stair climbing mechanism 2100, so as to avoid interfering with the operation of the stair climbing mechanism 2100. When the stair climbing vehicle needs to run on the ground, the first support wheel assembly 2200 and the second support wheel assembly 1300 move downward and contact the ground, and the stair climbing mechanism 2100 is suspended.

[0034] During the process of the stair climbing vehicle climbing up the stairs, when the upper end of the stair climbing mechanism 2100 reaches the top, the first support wheel assembly 2200 is extended to support the stair climbing vehicle, and as the lower end of the stair climbing mechanism 2100 gradually reaches the top, the second support wheel assembly 1300 is extended. During the process of the stair climbing vehicle climbing down the stairs, when the lower end of the stair climbing mechanism 2100 reaches the bottom, the second support wheel assembly 1300 is extended to support the stair climbing vehicle, and as the upper end of the stair climbing mechanism 2100 gradually reaches the bottom, the first support wheel assembly 2200 is extended.

[0035] It should be noted that when the stair climbing vehicle climbs up the stairs to the top or down the stairs to the bottom, in order to enable the first support wheel assembly 2200 to support the stair climbing vehicle as soon as possible, the first roller 2201 can protrude from the bottom of the stair climbing mechanism 2100 before the first support foot 2202, so as to avoid that the first support foot 2202 hinders the first roller 2201 from contacting the ground. It can be understood that during the extension of the first roller 2201, if the structure of the first support foot 2202 is lower than the first roller 2201, the structure of the first support foot 2202 contacts the ground before the first roller 2201, which can cause that the first support foot 2202 cannot move, and further cause that the first roller 2201 cannot continue to extend and contact the ground.

[0036] As an embodiment, in combination with FIGS. 1 to 3, the first support foot 2202 is hinged to the stair climbing mechanism 2100, and the first support foot 2202 rotates up and down to extend or retract the first roller 2201 from the bottom of the stair climbing mechanism 2100. Specifically, when the first support foot 2202 rotates downward, the first roller 2201 extends from the bottom of the stair climbing mechanism 2100; when the first support foot 2202 rotates upward, the first roller 2201 retracts from the bottom of the stair climbing mechanism 2100.

[0037] Further, the first support foot 2202 has an upwardly arched shape, the first support foot 2202 forms a downwardly extending end, and the first roller 2201 is arranged at the end. In this case, when the first support foot 2202 swings downward, the first roller 2201 at the end of the first support foot 2202 protrudes from the bottom of the stair climbing mechanism 2100 first. In some examples, in combination with FIGS. 1 to 3, the first support foot 2202 is arranged as a tripod structure.

[0038] It can be understood that in combination with FIG. 3, the stair climbing vehicle comprises a first driving assembly 2300, the first driving assembly 2300 is arranged on the stair climbing mechanism 2100, and the first driving assembly 2300 is connected to the first support wheel assembly 2200. Under the driving of the first driving assembly 2300, the first support foot 2202 rotates in the stair climbing mechanism 2100 to realize the extension or retraction of the first roller 2201. Further, one end of the first driving assembly 2300 is hinged to the first support wheel assembly 2200, and the other end of the first driving assembly 2300 is hinged to the stair climbing mechanism 2100.

[0039] In some examples, the first driving assembly 2300 comprises an electric push rod. The first driving assembly 2300 can be at least alternatively designed as follows: the first driving assembly 2300 comprises a hydraulic cylinder or an air cylinder.

[0040] Regarding the implementation mode of the extension or retraction of the first roller from the bottom of the stair climbing mechanism, at least an alternative design is as follows: the first support foot is provided with an electric push rod or a hydraulic cylinder or an air cylinder, so as to push the first roller out of the bottom of the stair climbing mechanism along a straight line.

[0041] As an implementation, the stair climbing mechanism 2100 comprises a track, and the stair climbing mechanism 2100 climbs up or down the stairs through the track. Further, the stair climbing mechanism 2100 comprises a chassis, and the track is arranged on the chassis. The left and right sides of the chassis are respectively arranged with the track. It can be understood that one end of the object table 1100 is hinged to the chassis, the first supporting leg 2202 is hinged to the chassis, and the first driving assembly 2300 is hinged to the bottom plate.

[0042] Further, in combination with FIG. 3, the track comprises a climbing section 2101, and the climbing section 2101 is a straight section. The track climbs up or down the stairs through the climbing section 2101.

[0043] In some examples, in combination with FIG. 3, the track comprises a guide section 2102, and the guide section 2102 is located at one end of the climbing section 2101. The guide section 2102 is inclined upward relative to the climbing section 2101, and the guide section 2102 and the climbing section 2101 share the track. When the stair climbing vehicle climbs up the stairs, the guide section 2102 of the track first contacts the first step, so that the stair climbing mechanism 2100 starts to climb up the stairs. When the stair climbing vehicle descends the stairs, the guide section 2102 of the track contacts the last step in an inclined state, so that the stair climbing mechanism 2100 gradually descends the stairs and facilitates the first supporting wheel assembly 2200 to extend out.

[0044] It should be noted that the first roller 2201 is retracted from the bottom of the stair climbing mechanism 2100 and is close to the corner between the guide section 2102 and the climbing section 2101. The first roller 2201 at this position can be conveniently and quickly extended out. Especially when the upper end of the stair climbing mechanism 2100 reaches the top of the stairs, the first roller 2201 is at the corner between the guide section 2102 and the climbing section 2101 at the upper end of the stair climbing mechanism 2100. The first roller 2201 extends out and supports the stair climbing mechanism 2100, avoiding the stair climbing vehicle from tipping over.

[0045] As an implementation, the first supporting wheel assembly 2200 is provided in two, and the stair climbing mechanism 2100 is located between the two first supporting wheel assemblies 2200. Specifically, the two first supporting wheel assemblies 2200 are respectively located on the left and right sides of the chassis of the stair climbing mechanism 2100. It can be understood that arranging the first supporting wheel assembly 2200 on the outside of the stair climbing mechanism 2100 can improve the stability of the center of gravity of the stair climbing vehicle.

[0046] Further, in combination with FIG. 3, a connecting rod is arranged between the two first supporting wheel assemblies 2200. The two ends of the connecting rod are respectively fixedly connected to the two first supporting legs 2202. One end of the first driving assembly 2300 is hinged to the connecting rod, and the first driving assembly 2300 drives the two first supporting legs 2202 to rotate simultaneously through the connecting rod.

[0047] In some examples, as shown in FIG. 2 and FIG. 4, the second support wheel assembly 1300 is provided in two, and the second support wheel assembly 1300 is fixedly provided on the left and right sides of the object table 1100. When the stair climbing vehicle is running on the ground, the stair climbing mechanism 2100 is located between the two second support wheel assemblies 1300, and the two second support wheel assemblies 1300 are respectively located on the left and right sides of the chassis of the stair climbing mechanism 2100, thereby improving the stability of the center of gravity of the stair climbing vehicle.

[0048] As an implementation form, as shown in FIG. 1, the stair climbing vehicle comprises a second driving assembly 1400, the second driving assembly 1400 is provided on the stair climbing mechanism 2100, and the second driving assembly 1400 is connected to the object table 1100. Under the driving of the second driving assembly 1400, the object table 1100 rotates to tilt the object table 1100 relative to the stair climbing mechanism 2100, thereby adjusting the inclination of the object table 1100 relative to the stair climbing mechanism 2100.

[0049] It can be understood that one end of the second driving assembly 1400 is hinged to the object table 1100, and the other end of the second driving assembly 1400 is hinged to the stair climbing mechanism 2100, specifically, the other end of the second driving assembly 1400 is hinged to the chassis.

[0050] Further, the second driving assembly 1400 comprises an electric push rod. Alternatively, the second driving assembly 1400 can also be designed as: the second driving assembly 1400 comprises a hydraulic cylinder or an air cylinder.

[0051] As an implementation form, as shown in FIG. 1 and FIG. 2, the object table mechanism comprises a support frame 1501, the support frame 1501 is vertically provided on the object table 1100, so that the objects on the object table 1100 can lean against the side surface of the support frame 1501. Further, the support frame 1501 comprises a vertical column and a cross beam.

[0052] It should be noted that the support frame 1501 is provided on the end of the object table 1100 which is hinged to the stair climbing mechanism 2100. When the inclination of the object table 1100 is adjusted, the other end of the object table 1100 is raised relative to the stair climbing mechanism 2100, so that the object table 1100 is at least horizontal, or the other end of the object table 1100 is higher than the end of the object table 1100 which is hinged to the stair climbing mechanism 2100, and then the side surface of the support frame 1501 can support the objects.

[0053] In some examples, the rear end of the object table 1100 is hinged to the chassis of the stair climbing mechanism 2100, and then the support frame 1501 is provided on the rear end of the object table 1100. In other examples, the front end of the object table 1100 is hinged to the chassis of the stair climbing mechanism 2100, and then the support frame 1501 is provided on the front end of the object table 1100.

[0054] In some examples, the stair climber includes a handrail 1502, which is disposed on the support frame 1501. Further, the height of the handrail 1502 on the support frame 1501 is adjustable.

[0055] In some examples, the stair climber includes a control device 1503, which includes an up button, a down button, a flat button and an emergency stop button. A user can conveniently control the stair climber through the control device 1503. Further, the control device 1503 is disposed on the support frame 1501 and located at the top of the support frame 1501 for convenient operation. Specifically, the control device 1503 is disposed on the crossbeam of the support frame 1501.

[0056] As an implementation, the loading mechanism includes a support plate 1201, at least one side of the loading platform 1100 is provided with the support plate 1201, and the support plate 1201 is used to increase the loading area of the loading platform 1100 so as to place more articles on the loading platform 1100.

[0057] Specifically, as shown in FIGS. 2 and 4, the left and right sides of the loading platform 1100 are respectively provided with the support plates 1201. Of course, as an alternative, at least one of the left side, the right side and the front side of the loading platform 1100 is provided with the support plate 1201; or, all of the left side, the right side and the front side of the loading platform 1100 are provided with the support plates 1201.

[0058] Further, the support plate 1201 is movable. A user adjusts the position of the support plate 1201 to increase the loading area of the loading platform 1100. Specifically, the support plate 1201 is movably connected to the loading platform 1100, and the support plate 1201 is movable along a direction parallel to the loading surface of the loading platform 1100 to move close to or away from the loading platform 1100. When a user moves the support plate 1201 to a position away from the loading platform 1100, the loading area of the loading platform 1100 is increased.

[0059] In some examples, the support plate 1201 is connected to the loading platform 1100 through a guide structure, the guide structure is movably disposed on the loading platform 1100, and one end of the guide structure is fixedly connected to the support plate 1201. A user extracts the guide structure of the support plate 1201 from the loading platform 1100, and then fixes the other end of the guide structure to the loading platform 1100, so as to fix the support plate 1201.

[0060] It can be understood that, as shown in FIG. 4, the loading mechanism includes a locking member 1204, which fixes the guide structure by pressing the side wall of the guide structure, so as to fix the position of the support plate 1201.

[0061] Further, in combination with FIG. 4, the guide structure is designed as a guide rod 1202, the lower side surface of the object table 1100 is provided with a guide groove 1203, the guide structure penetrates the guide groove 1203 and can move in the guide groove 1203. A locking piece 1204 is arranged on the guide groove 1203 and penetrates the side wall of the guide groove 1203. It can be understood that the guide structure can also be designed as a connecting plate at least.

[0062] The side wall of the guide groove 1203 is provided with a threaded hole, the locking piece 1204 is provided with an external thread, the locking piece 1204 penetrates the threaded hole and the end of the locking piece 1204 abuts against the surface of the guide structure. Specifically, the guide groove 1203 is designed as a through structure, and the locking piece 1204 has a threaded stud.

[0063] Regarding the moving mode of the support plate 1201, it can also be designed as follows at least: the support plate 1201 is hinged to the side edge of the object table 1100 and can rotate up and down. The user rotates the support plate 1201 upward to a position flush with the upper side surface of the object table 1100, and then the support plate 1201 is used to carry the object.

[0064] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A stair climber characterized by: Comprising a load mechanism, the load mechanism comprising a load table; a stair climbing mechanism, one end of the load table is hinged to the stair climbing mechanism, the load table is capable of adjusting the inclination on the stair climbing mechanism; a first support wheel assembly, the first support wheel assembly comprising a first roller and a first support leg, the first roller is arranged at the end of the first support leg, the first support leg is arranged on the stair climbing mechanism; wherein the first support leg is used to extend or retract the first roller from the bottom of the stair climbing mechanism, and the first roller can protrude from the bottom of the stair climbing mechanism before the first support leg.

2. The stair climber of claim 1, wherein: The stair climbing vehicle comprises a first driving assembly arranged on the stair climbing mechanism, the first support leg is hinged to the stair climbing mechanism, and the first driving assembly drives the first support leg to rotate on the stair climbing mechanism.

3. The stair climber of claim 2, wherein: The first support leg has an upward arch shape.

4. Stair climber according to any of claims 1 to 3, characterized in that: The first support wheel assembly is arranged in two, and the stair climbing mechanism is located between the two first support wheel assemblies.

5. The stair climber of any one of claims 1 to 3, wherein: The stair climbing mechanism comprises a track belt, the track belt comprises a climbing section and a guide section, the guide section is inclined upward relative to the climbing section, and the first roller is close to the corner between the guide section and the climbing section after being retracted from the bottom of the stair climbing mechanism.

6. The stair climber of any one of claims 1 to 3, wherein: The load mechanism comprises a support plate, at least one side of the load table is provided with the support plate, the support plate is movable, and the support plate is used to increase the carrying area of the load table.

7. The stair climber of claim 6, wherein: The support plate is movably connected to the load table, and the support plate can move close to or away from the load table in a direction parallel to the carrying surface of the load table.

8. The stair climber of claim 7, wherein: The support plate is connected to the load table through a guide structure, the guide structure is movably arranged on the load table, and one end of the guide structure is fixedly connected to the support plate.

9. The stair climber of claim 8, wherein: The guide structure is arranged as a guide rod, the lower surface of the load table is provided with a guide groove, the guide structure penetrates the guide groove, and the guide structure is movable in the guide groove.

10. The stair climber of claim 9, wherein: The load mechanism comprises a locking piece, the locking piece penetrates the side wall of the guide groove, and the locking piece fixes the guide structure by pressing the side wall of the guide structure.

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