Stair climbing vehicle

Abstract

The utility model discloses a stair climbing vehicle which comprises a carrying mechanism, a stair climbing mechanism and a first supporting wheel assembly, and the carrying mechanism comprises a carrying table; one end of the objective table is hinged to the stair climbing mechanism, and the inclination of the objective table on the stair climbing mechanism can be adjusted; the first supporting wheel assembly comprises a first rolling wheel and a first supporting leg, the first rolling wheel is arranged at the tail end of the first supporting leg, and the first supporting leg is arranged on the stair climbing mechanism; the first supporting legs are used for stretching out or retracting the first rolling wheels from the bottom of the stair climbing mechanism, the first rolling wheels replace the stair climbing mechanism to make contact with the ground, and supporting and flat ground walking of the stair climbing trolley are achieved. The first rollers can protrude out of the bottom of the stair climbing mechanism before the first supporting legs, the first supporting legs are prevented from making contact with the ground firstly and hindering rolling contact between the first rollers and the ground, and it is ensured that the first rollers replace the crawler belts to achieve the supporting and walking effects. The device can be widely applied to the technical field of carrying equipment.

Description

Technical Field

[0001] This application relates to the technical field of stair-climbing handling equipment, and particularly to a stair-climbing vehicle. Background Art

[0002] In the group meal industry such as schools and enterprises, meal boxes or buckets sometimes need to be carried up the steps. If carried manually, it is labor-intensive and dangerous. Therefore, stair-climbing vehicles are sometimes used to replace manual handling. A common stair-climbing vehicle is a crawler-type stair-climbing machine. When the stair-climbing vehicle switches from going up or down the stairs to walking on flat ground, the crawler needs to be suspended and switched to rollers for walking on flat ground, which is convenient for the user to pull or push the stair-climbing vehicle.

[0003] However, the existing stair-climbing vehicles have the following problems: when the stair-climbing vehicle goes up and down the stairs, the items are likely to fall; when switching to roller walking, the rollers cannot replace the crawler in contacting the ground; the load capacity of the stair-climbing vehicle is limited and the handling efficiency is low; the center of the stair-climbing vehicle is unstable and it is easy to tip over when walking on flat ground. Utility Model Content

[0004] To solve at least one of the above technical problems, this application provides a stair-climbing vehicle, and the technical solutions adopted are as follows.

[0005] The stair-climbing vehicle provided by this application includes a load-carrying mechanism, a stair-climbing mechanism, and a first support wheel assembly. The load-carrying mechanism includes a load-carrying platform; one end of the load-carrying platform is hinged to the stair-climbing mechanism, and the load-carrying platform can adjust the inclination on the stair-climbing mechanism; the first support wheel assembly includes a first roller and a first support foot. The first roller is arranged at the end of the first support foot, and the first support foot is arranged on the stair-climbing mechanism; wherein, the first support foot 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 prior to the first support foot.

[0006] In some embodiments of this application, the stair-climbing vehicle includes a first driving assembly. The first driving assembly is arranged on the stair-climbing mechanism. The first support foot is hinged to the stair-climbing mechanism, and the first driving assembly drives the first support foot to rotate on the stair-climbing mechanism.

[0007] In some embodiments of this application, the first support foot has an upwardly arched shape.

[0008] In some embodiments of this application, two first support wheel assemblies are provided, and the stair-climbing mechanism is located between the two first support wheel assemblies.

[0009] In some embodiments of the present application, the stair-climbing mechanism includes a crawler belt, the crawler belt includes a crawling section and a guiding section, the guiding section is inclined upward relative to the crawling section, and the first roller is close to the corner of the guiding section and the crawling section after being retracted from the bottom of the stair-climbing mechanism.

[0010] In some embodiments of the present application, the load-carrying mechanism includes a support plate, the support plate is provided on at least one side edge of the load-carrying platform, the support plate is movable, and the support plate is used to increase the load-carrying area of the load-carrying platform.

[0011] In some embodiments of the present application, the support plate is movably connected to the load-carrying platform, and the support plate can move closer to or away from the load-carrying platform along a direction parallel to the load-bearing surface of the load-carrying platform.

[0012] In some embodiments of the present application, the support plate is connected to the load-carrying platform through a guiding structure, the guiding structure is movably arranged on the load-carrying platform, and one end of the guiding structure is fixedly connected to the support plate.

[0013] In some embodiments of the present application, the guiding structure is arranged as a guide rod, a guide groove member is arranged on the lower side surface of the load-carrying platform, the guiding structure penetrates through the guide groove member and the guiding structure can move in the guide groove member.

[0014] In some embodiments of the present application, the load-carrying mechanism includes a locking member, the locking member penetrates through the side wall of the guide groove member, and the locking member fixes the guiding structure by pressing the side wall of the guiding structure.

[0015] The present application has at least the following beneficial effects: The load-carrying platform of the stair-climbing vehicle is designed to be able to adjust the inclination relative to the stair-climbing mechanism. When the stair-climbing mechanism goes up and down the stairs in an inclined state, the load-carrying platform is adjusted to at least a horizontal state to prevent items from falling. The first support wheel assembly can extend from the bottom of the stair-climbing mechanism, so that the first roller replaces the stair-climbing mechanism to contact the ground, realizing the support of the stair-climbing vehicle and walking on flat ground. And the first roller extends out before the first support foot, preventing the first support foot from contacting the ground first and interfering with the rolling contact of the first roller with the ground, ensuring that the first roller replaces the crawler belt to play a supporting and walking role. The present application can be widely applied to the technical field of handling equipment.

[0016] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following will further illustrate the present application in conjunction with the drawings and embodiments. It should be noted that the embodiments shown in the following drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0018] Figure 1 It is a structural diagram of a stair-climbing cart.

[0019] Figure 2 It is a structural diagram of a stair-climbing cart.

[0020] Figure 3 It is a structural diagram of a stair-climbing mechanism and a first support wheel assembly.

[0021] Figure 4 It is a structural diagram of a load-carrying platform.

[0022] Reference numerals: 1100, load-carrying platform; 1201, support plate; 1202, guide rod; 1203, guide groove member; 1204, locking member; 1300, second support wheel assembly; 1301, second roller; 1302, second support foot; 1400, second drive assembly; 1501, support frame; 1502, handrail; 1503, control device; 2100, stair-climbing mechanism; 2101, crawling section; 2102, guiding section; 2200, first support wheel assembly; 2201, first roller; 2202, first support foot; 2300, first drive assembly. Detailed implementation manners

[0023] The following will combine the attached Figure 1 to the attached Figure 4 Describe the embodiments of the present application in detail, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the attached drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0024] In the description of the present application, it should be understood that if terms such as "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used to indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the attached drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0025] In the description of the present application, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first", "first" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0026] In the description of the present application, unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] In the description of the present application, if there are descriptions with reference terms such as "as an implementation manner", "an embodiment", "some examples", "some embodiments", "schematic embodiments", "examples", "specific examples", "some examples", etc., it means that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0028] The present application relates to a stair-climbing vehicle that can climb up stairs, climb down stairs, and travel on flat ground, and the stair-climbing vehicle can carry objects. Specifically, the stair-climbing vehicle includes a load-carrying mechanism and a stair-climbing mechanism 2100. The load-carrying mechanism is arranged on the stair-climbing mechanism 2100. The stair-climbing mechanism 2100 realizes climbing up stairs or climbing down stairs, and the load-carrying mechanism is used for carrying items.

[0029] It can be understood that the load-carrying mechanism includes a load-carrying platform 1100, and the items are placed on the upper surface of the load-carrying platform 1100. Combining with the Figure 1 and the Figure 2 , one end of the load-carrying platform 1100 is hinged to the stair-climbing mechanism 2100, and the load-carrying platform 1100 can adjust the inclination on the stair-climbing mechanism 2100. When the stair-climbing mechanism 2100 climbs up stairs or climbs down stairs, the stair-climbing mechanism 2100 is in an inclined state. At this time, the load-carrying platform 1100 adjusts the angle to prevent the items on the load-carrying platform 1100 from falling or slipping.

[0030] Combining with the Figure 1 and the Figure 2 , the stair-climbing vehicle includes a first support wheel assembly 2200, and the first support wheel assembly 2200 is arranged on the stair-climbing mechanism 2100. When the stair-climbing vehicle finishes climbing up stairs or climbing down stairs and then travels on flat ground, the first support wheel assembly 2200 contacts the ground. It can be understood that combining with the Figure 3, the first support wheel assembly 2200 includes a first roller 2201 and a first support leg 2202. The first roller 2201 is set as a universal wheel and is disposed at the end of the first support leg 2202. The first support leg 2202 is disposed 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.

[0031] Further, in combination with the attached Figure 2 , the stair-climbing vehicle includes a second support wheel assembly 1300, and the second support wheel assembly 1300 is disposed on the load platform 1100. When the stair-climbing vehicle travels on flat 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 achieve flat-ground travel. It can be understood that, in combination with the attached Figure 4 , the second support wheel assembly 1300 includes a second roller 1301 and a second support leg 1302. The second roller 1301 is set as a universal wheel and is disposed at the end of the second support leg 1302. The second support leg 1302 is disposed on the load platform 1100, and the second support leg 1302 is fixedly connected to the load platform 1100.

[0032] When the stair-climbing vehicle goes up or down the stairs, the stair-climbing mechanism 2100 tilts and contacts the stairs. The first support wheel assembly 2200 and the second support wheel assembly 1300 are located at a position higher than the bottom of the stair-climbing mechanism 2100 to avoid interfering with the operation of the stair-climbing mechanism 2100. When the stair-climbing vehicle needs to travel on flat 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.

[0033] During the process of the stair-climbing vehicle going up the stairs, when the upper end of the stair-climbing mechanism 2100 reaches the top, the first support wheel assembly 2200 extends to support the stair-climbing vehicle. As the lower end of the stair-climbing mechanism 2100 gradually reaches the top, the second support wheel assembly 1300 extends. During the process of the stair-climbing vehicle going down the stairs, when the lower end of the stair-climbing mechanism 2100 reaches the bottom, the second support wheel assembly 1300 extends to support the stair-climbing vehicle. As the upper end of the stair-climbing mechanism 2100 gradually reaches the bottom, the first support wheel assembly 2200 extends.

[0034] It should be noted that when the stair - climbing vehicle climbs to the top of the stairs or descends to the bottom of the stairs, 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 prior to the first support foot 2202, so as to prevent the first support foot 2202 from interfering with the first roller 2201's contact with the ground. It can be understood that during the process of the first roller 2201 extending, if the structure of the first support foot 2202 is lower than that of the first roller 2201, the structure of the first support foot 2202 will contact the ground prior to the first roller 2201, which may cause the first support foot 2202 to be unable to move, and further cause the first roller 2201 to be unable to continue to extend and contact the ground.

[0035] As an implementation manner, in combination with Attached Figure 1 to Attached Figure 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 enable the first roller 2201 to protrude from or retract into the bottom of the stair - climbing mechanism 2100. Specifically, when the first support foot 2202 rotates downward, the first roller 2201 protrudes 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.

[0036] Furthermore, the first support foot 2202 has a shape that arches upward, the first support foot 2202 forms a downward - extending end, and the first roller 2201 is disposed at this 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 Attached Figure 1 to Attached Figure 3 , the first support foot 2202 is arranged in a tripod structure.

[0037] It can be understood that in combination with Attached Figure 3 , the stair - climbing vehicle includes a first drive assembly 2300. The first drive assembly 2300 is disposed on the stair - climbing mechanism 2100, and the first drive assembly 2300 is connected to the first support wheel assembly 2200. Driven by the first drive assembly 2300, the first support foot 2202 rotates on the stair - climbing mechanism 2100 to realize the extension or retraction of the first roller 2201. Further, one end of the first drive assembly 2300 is hinged to the first support wheel assembly 2200, and the other end of the first drive assembly 2300 is hinged to the stair - climbing mechanism 2100.

[0038] In some examples, the first drive assembly 2300 includes an electric push rod. The first drive assembly 2300 can be at least alternatively designed as: the first drive assembly 2300 includes a hydraulic cylinder or a pneumatic cylinder.

[0039] Regarding the implementation of the first roller extending or retracting from the bottom of the stair-climbing mechanism, it can be at least alternatively designed as follows: The first support foot is provided with an electric push rod, a hydraulic cylinder or a cylinder, so as to push the first roller out from the bottom of the stair-climbing mechanism in a straight line.

[0040] As an implementation manner, the stair-climbing mechanism 2100 includes a crawler, and the stair-climbing mechanism 2100 climbs up or down stairs through the crawler. Further, the stair-climbing mechanism 2100 includes a chassis, the crawler is arranged on the chassis, and the crawlers are arranged on both the left and right sides of the chassis. It can be understood that one end of the load-carrying platform 1100 is hinged to the chassis, the first support foot 2202 is hinged to the chassis, and the first driving assembly 2300 is hinged to the bottom plate.

[0041] Further, in combination with the attached Figure 3 , the crawler includes a crawling section 2101, and the crawling section 2101 is a straight section. The stair-climbing mechanism climbs up or down stairs through the crawling section 2101.

[0042] In some examples, in combination with the attached Figure 3 , the crawler includes a guiding section 2102, the guiding section 2102 is located at one end of the crawling section 2101, the guiding section 2102 is inclined upward relative to the crawling section 2101, and the guiding section 2102 and the crawling section 2101 share the same crawler. When the stair-climbing vehicle climbs up the stairs, the guiding section 2102 of the crawler first contacts the first step, so that the stair-climbing mechanism 2100 starts to climb up the stairs. When the stair-climbing vehicle climbs down the stairs, the guiding section 2102 of the crawler contacts the last step in an inclined state, so that the stair-climbing mechanism 2100 gradually climbs down the stairs and it is convenient for the first support wheel assembly 2200 to extend.

[0043] It should be noted that after the first roller 2201 retracts from the bottom of the stair-climbing mechanism 2100, it is close to the corner between the guiding section 2102 and the crawling section 2101. When the first roller 2201 is in this position, it can be quickly extended very conveniently. 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 guiding section 2102 and the crawling section 2101 at the upper end of the stair-climbing mechanism 2100. The first roller 2201 extends and plays a role in supporting the stair-climbing mechanism 2100 to prevent the stair-climbing vehicle from tipping over.

[0044] As an implementation manner, the first support wheel assembly 2200 is provided with two, and the stair-climbing mechanism 2100 is located between the two first support wheel assemblies 2200. Specifically, the two first support 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 setting the first support wheel assembly 2200 on the outside of the stair-climbing mechanism 2100 can improve the center-of-gravity stability of the stair-climbing vehicle.

[0045] Further, in combination with the attached Figure 3A connecting rod is arranged between the two first supporting wheel assemblies 2200, and the two ends of the connecting rod are respectively fixedly connected to the two first supporting feet 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 feet 2202 to rotate simultaneously through the connecting rod.

[0046] In some examples, the Figure 2 and attached Figure 4 , two second support wheel assemblies 1300 are provided, and the second support wheel assemblies 1300 are fixedly arranged on the left and right sides of the loading platform 1100. When the stair climbing vehicle is walking on flat 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, so as to improve the center of gravity stability of the stair climbing vehicle.

[0047] As an implementation method, in combination with the attached Figure 1 The stair climbing vehicle includes a second driving assembly 1400, which is disposed on the stair climbing mechanism 2100 and connected to the loading platform 1100. Driven by the second driving assembly 1400, the loading platform 1100 rotates to tilt the loading platform 1100 relative to the stair climbing mechanism 2100, thereby adjusting the inclination of the loading platform 1100 relative to the stair climbing mechanism 2100.

[0048] It can be understood that one end of the second drive assembly 1400 is hinged to the loading platform 1100 , and the other end of the second drive assembly 1400 is hinged to the stair climbing mechanism 2100 . Specifically, the other end of the second drive assembly 1400 is hinged to the chassis.

[0049] Further, the second drive assembly 1400 includes an electric push rod. The second drive assembly 1400 can also be at least alternatively designed as follows: the second drive assembly 1400 includes a hydraulic cylinder or a pneumatic cylinder.

[0050] As an implementation method, in combination with the attached Figure 1 and attached Figure 2 The object loading mechanism includes a support frame 1501, and the support frame 1501 is vertically arranged on the loading platform 1100, so that the objects on the loading platform 1100 can lean against the side of the support frame 1501. Further, the support frame 1501 includes a column and a beam.

[0051] It should be noted that the support frame 1501 is arranged on one end of the loading platform 1100 which is hinged to the stair climbing mechanism 2100. When the inclination of the loading platform 1100 is adjusted, the other end of the loading platform 1100 is tilted relative to the stair climbing mechanism 2100 so that the loading platform 1100 is at least horizontal, or the other end of the loading platform 1100 is higher than the end of the loading platform 1100 which is hinged to the stair climbing mechanism 2100. Then, the side of the support frame 1501 can play a role in supporting the objects.

[0052] In some examples, the rear end of the carrier 1100 is hinged to the chassis of the stair-climbing mechanism 2100, and the support frame 1501 is arranged at the rear end of the carrier 1100. In other examples, the front end of the carrier 1100 is hinged to the chassis of the stair-climbing mechanism 2100, and the support frame 1501 is arranged at the front end of the carrier 1100.

[0053] In some examples, in combination with the attached Figure 1 and the attached Figure 2 , the stair-climbing vehicle includes a handrail 1502, and the handrail 1502 is arranged on the support frame 1501. Further, the height of the handrail 1502 on the support frame 1501 is adjustable.

[0054] In some examples, the stair-climbing vehicle includes a control device 1503. The control device 1503 includes an up-stair button, a down-stair button, a flat-ground button, and an emergency stop button. The user can conveniently operate the stair-climbing vehicle through the control device 1503. Further, in combination with the attached Figure 2 , the control device 1503 is arranged on the support frame 1501, and the control device 1503 is located at the top of the support frame 1501 for convenient operation. Specifically, the control device 1503 is arranged on the cross beam of the support frame 1501.

[0055] As an implementation manner, the loading mechanism includes a support plate 1201. The support plate 1201 is arranged on at least one side edge of the carrier 1100. The support plate 1201 is used to increase the loading area of the carrier 1100 so as to place more items on the carrier 1100.

[0056] Specifically, in combination with the attached Figure 2 and the attached Figure 4 , the left and right side edges of the carrier 1100 are respectively provided with the support plate 1201. Of course, as an alternative solution, it can be at least designed as: the support plate 1201 is arranged on the left side edge or the right side edge or the front side edge of the carrier 1100; or, the support plate 1201 is arranged on the left side edge, the right side edge, and the front side edge of the carrier 1100.

[0057] Further, the support plate 1201 can be movable. The user adjusts the position of the support plate 1201 to increase the loading area of the carrier 1100. Specifically, the support plate 1201 is movably connected to the carrier 1100, and the support plate 1201 can move closer to or away from the carrier 1100 along a direction parallel to the loading surface of the carrier 1100. When the user moves the support plate 1201 to a position away from the carrier 1100, the loading area of the carrier 1100 is increased.

[0058] In some examples, the support plate 1201 is connected to the stage 1100 through a guiding structure. The guiding structure is movably arranged on the stage 1100, and one end of the guiding structure is fixedly connected to the support plate 1201. After the user pulls out the guiding structure of the support plate 1201 from the stage 1100 and fixes the other end of the guiding structure to the stage 1100, the support plate 1201 is thus fixed.

[0059] It can be understood that in combination with the attached Figure 4 , the loading mechanism includes a locking member 1204. The locking member 1204 fixes the guiding structure by pressing against the side wall of the guiding structure, so as to fix the position of the support plate 1201.

[0060] Furthermore, in combination with the attached Figure 4 , the guiding structure is set as a guide rod 1202. A guide groove member 1203 is arranged on the lower surface of the stage 1100. The guiding structure penetrates through the guide groove member 1203 and can move in the guide groove member 1203. The locking member 1204 is arranged on the guide groove member 1203 and the locking member 1204 penetrates through the side wall of the guide groove member 1203. It can be understood that the guiding structure can at least be alternatively designed as a connecting plate.

[0061] Threaded holes are arranged on the side wall of the guide groove member 1203. The locking member 1204 is provided with external threads. The locking member 1204 penetrates through the threaded holes and the end of the locking member 1204 presses against the surface of the guiding structure. Specifically, the guide groove member 1203 is set as a through structure, and the locking member 1204 has a stud.

[0062] Regarding the movement mode of the support plate 1201, it can at least be alternatively designed as: the support plate 1201 is hinged to the side of the stage 1100, and the support plate 1201 can rotate up and down. When the user rotates the support plate 1201 upwards to a position flush with the upper surface of the stage 1100, the support plate 1201 is used to carry items.

[0063] The above has described the embodiments of the present application in detail in combination with the accompanying drawings. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can also be made without departing from the purpose of the present application. In addition, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

Claims

1. A stair-climbing vehicle, characterized in that: including a load-carrying mechanism, the load-carrying mechanism including a load platform; a stair-climbing mechanism, one end of the load platform being hinged to the stair-climbing mechanism, and the load platform being able to adjust the inclination on the stair-climbing mechanism; a first support wheel assembly, the first support wheel assembly including a first roller and a first support leg, the first roller being provided at the end of the first support leg, and the first support leg being provided on the stair-climbing mechanism; wherein, the first support leg is used for extending or retracting 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 prior to the first support leg.

2. The stair-climbing vehicle according to claim 1, wherein: The stair-climbing vehicle includes a first driving assembly, the first driving assembly being provided on the stair-climbing mechanism, the first support leg being hinged to the stair-climbing mechanism, and the first driving assembly driving the first support leg to rotate on the stair-climbing mechanism.

3. The stair-climbing vehicle according to claim 2, wherein: The first support leg has a shape arched upward.

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

5. The stair-climbing vehicle according to any one of claims 1 to 3, characterized in that: The stair-climbing mechanism includes a crawler belt, the crawler belt including a crawling section and a guiding section, the guiding section being inclined upward relative to the crawling section, and the first roller is close to the corner between the guiding section and the crawling section after being retracted from the bottom of the stair-climbing mechanism.

6. The stair-climbing vehicle according to any one of claims 1 to 3, characterized in that: The load-carrying mechanism includes a support plate, at least one side of the load platform being provided with the support plate, the support plate being movable, and the support plate being used for increasing the load-bearing area of the load platform.

7. The stair-climbing vehicle according to claim 6, wherein: The support plate is movably connected to the load platform, and the support plate can move closer to or away from the load platform in a direction parallel to the bearing surface of the load platform.

8. The stair-climbing vehicle according to claim 7, wherein: The support plate is connected to the load platform through a guiding structure, the guiding structure being movably provided on the load platform, and one end of the guiding structure being fixedly connected to the support plate.

9. The stair-climbing vehicle according to claim 8, wherein: The guiding structure is provided as a guide rod, a guide groove member being provided on the lower side surface of the load platform, the guiding structure passing through the guide groove member and being able to move in the guide groove member.

10. The stair-climbing vehicle according to claim 9, wherein: The load-carrying mechanism includes a locking member, the locking member passing through the side wall of the guide groove member, and the locking member fixing the guiding structure by pressing the side wall of the guiding structure.

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