Stair-climbing transportation robot

Abstract

The invention discloses a stair-climbing transportation robot, which relates to the technical field of logistics transportation, and comprises a vehicle body, two groups of crawler belt assemblies respectively arranged on two sides of the vehicle body in the moving direction, and a lifting assembly arranged at one end of the vehicle body in the moving direction, the lifting assembly comprises a telescopic part arranged in the vehicle body and at least one moving wheel suspended below the vehicle body, the movable end of the telescopic part extends to the bottom of the vehicle body and is connected with a rotating shaft of each moving wheel, the movable end of the telescopic part is driven to stretch out and draw back in the direction that the moving wheels are away from or close to the vehicle body, and the distance from each moving wheel to the bottom face of the vehicle body is changed. And the structure is hidden at the bottom of the stair-climbing transportation robot, so that the structure can be prevented from being in contact with surrounding people or objects in the equipment advancing process.

Description

Technical Field

[0001] The present application relates to the field of logistics and transportation technology, and in particular to a stair-climbing transportation robot. Background Art

[0002] In actual production and life, there are many buildings without elevators. In this scenario, goods between floors are mainly transported by carrying heavy objects up the stairs. The difficulty of manual stair climbing increases with the increase of floors and the weight of the objects, especially for people with weaker physical fitness. The emergence of stair climbing transportation robots solves the dilemma of manual stair climbing transportation.

[0003] The Chinese patent "Application Number: CN202311037440.X" discloses "a stair-climbing transport robot and a working method". In the solution provided by the patent, two sets of drive tracks are arranged side by side under the support frame, and an angle adjustment member is arranged at one end of the support frame corresponding to each set of drive tracks. The drive tracks and the angle adjustment member are both strip structures. The angle between the adjustment member and the drive track is changed by rotating the adjustment member, thereby assisting the stair-climbing transport robot in going up and down stairs.

[0004] However, the angle adjustment member is exposed outside the device, and is located on the same side of the support frame as the control handle of the device. The operator needs to operate the control handle to drive the stair climbing and transporting robot, and the rotating angle adjustment member is dangerous to people or objects near it. Therefore, the present application proposes a stair climbing and transporting robot, which makes the structure of the stair climbing and transporting robot for going up and down stairs hidden, so as to prevent the structure from touching people or objects around it during the movement of the stair climbing and transporting robot. Summary of the invention

[0005] The main purpose of the present application is to provide a stair-climbing and transporting robot, which aims to solve the technical problem that when the structure of the stair-climbing and transporting robot that assists in going up and down stairs is exposed, it is easy to come into contact with people or objects around the device.

[0006] A stair-climbing transport robot, comprising:

[0007] Vehicle body;

[0008] Two sets of crawler assemblies are respectively arranged on both sides of the vehicle body;

[0009] The lifting assembly arranged at one end of the vehicle body moving direction includes a telescopic member arranged in the vehicle body and at least one moving wheel suspended under the vehicle body, wherein the movable end of the telescopic member extends to the bottom of the vehicle body and is connected to each moving wheel, driving the movable end of the telescopic member to extend and retract along the direction in which the moving wheel moves away from or close to the vehicle body, so as to change the distance from each moving wheel to the bottom surface of the vehicle body.

[0010] As a further improvement of the present application, the tops of the two track assemblies on the sides close to each other are connected to the side walls of the vehicle body, the bottom surface of each track assembly exceeds the bottom surface of the vehicle body by a preset distance, and each moving wheel is located between two track assemblies; the telescopic part includes a servo motor arranged in the vehicle body, an opening is provided on the bottom surface of the vehicle body, the working end of the servo motor is connected to one end of a support arm, the other end of the support arm extends through the opening to the bottom surface of the vehicle body and is vertically connected to the middle part of a round rod, the side wall of the round rod is sleeved with at least two moving wheels, and the axis of the round rod is perpendicular to the moving box of the vehicle body.

[0011] As a further improvement of the present application, the track assembly includes at least two first rollers and at least two second rollers that are arranged in parallel and linearly, and a track ring that is sleeved outside each first roller and each second roller; the first roller supports the inner top surface of the track ring, the second roller supports the inner bottom surface of the track ring, and the length of the inner top surface of the track ring is greater than the length of its inner bottom surface, so that the track ring forms an inverted trapezoidal ring.

[0012] As a further improvement of the present application, one end of each first roller shaft close to the lifting assembly extends into the interior of the vehicle body and is coaxially connected to the shaft of a motor, and one end of each second roller shaft close to the lifting assembly is rotatably connected to one end of a connecting plate, and the other end of each connecting plate is connected to the side wall of the vehicle body.

[0013] As a further improvement of the present application, the outer arm of each first roller shaft and the outer wall of each second roller shaft are sleeved with at least one outer toothed ring, the inner wall of the track ring is provided with teeth matching the teeth of each outer toothed ring, and each outer toothed ring is toothed with the teeth of the track ring.

[0014] As a further improvement of the present application, it also includes a power supply mechanism, which is provided with a charging pile and a battery arranged inside the vehicle body; the charging pile is provided with a flat support plate and a baffle standing on one side of the support plate, and a charging socket is provided on a side of the baffle adjacent to the support plate, and a side wall of the vehicle body moving toward one end is provided with a charging connector connected to the battery and adapted to the charging socket, and the charging connector is inserted into the charging socket to charge the battery.

[0015] As a further improvement of the present application, the stair-climbing transport robot also includes a cargo box arranged on the vehicle body, the cargo box is provided with a hollow cavity, the top of the cargo box is connected to the cavity and has a box cover hingedly connected.

[0016] As a further improvement of the present application, the stair-climbing transport robot also includes a human-computer interaction device, which is provided with a touch screen and a speaker installed on the top of the cargo box. The touch screen is used to display icons or text information and receive external touch operations, and the speaker is used to broadcast voice information.

[0017] As a further improvement of the present application, it also includes an information collection mechanism, which includes a pressure sensor arranged between the cargo box and the vehicle body, an infrared sensor arranged on the bottom surface of the vehicle body, a laser radar arranged on the top surface of the cargo box, and a real-sense depth camera arranged on the side wall of one end of the cargo box adjacent to the lifting component. The pressure sensor, the infrared sensor, the laser radar and the real-sense depth camera are used to obtain information about the environment in which the climbing robot is located.

[0018] As a further improvement of the present application, it also includes a central control mechanism electrically connected to the servo, the motor, the touch screen, the speaker, the pressure sensor, the infrared sensor, the lidar and the real-sense depth camera respectively, and the central control mechanism pre-stores a plurality of control instructions. The central control mechanism receives signals from the touch screen, the pressure sensor, the infrared sensor, the lidar and the real-sense depth camera, and matches corresponding control instructions to respectively control the servo and each motor to work, control the touch screen to display information, and control the speaker to broadcast information.

[0019] The technical solution provided by this application may have the following beneficial effects:

[0020] During use of the present application, the telescopic part is located inside the head end of the vehicle body, and the movable end of the telescopic part extends to the bottom of the vehicle body and is connected to the rotating shaft of each moving wheel. The extension or contraction of the movable end of the telescopic part can be controlled to change the distance between the head end of the vehicle body and the ground, thereby assisting the stair-climbing transport robot to go up and down stairs. This structure is hidden at the bottom of the stair-climbing transport robot to prevent the structure from touching people or objects around it during the movement of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0022] Figure 1 This is a three-dimensional structure diagram of a stair-climbing transport robot. Figure 1 ;

[0023] Figure 2 It is a schematic diagram of the internal structure of a stair-climbing transport robot;

[0024] Figure 3 This is a three-dimensional structure diagram of a stair-climbing transport robot. Figure 2 ;

[0025] Reference numerals:

[0026] 1. Vehicle body; 2. Track assembly; 21. First roller; 22. Second roller; 23. Track ring; 24. Motor; 25. Connecting plate; 26. External gear ring; 3. Lifting assembly; 31. Telescopic member; 311. Servo; 312. Support arm; 313. Round rod; 32. Moving wheel; 4. Power supply mechanism; 41. Charging pile; 411. Support plate; 412. Baffle; 413. Charging jack; 414. Charging connector; 42. Battery; 5. Cargo box; 51. Cavity; 52. Box cover; 6. Human-computer interaction device; 61. Touch screen; 62. Speaker; 7. Information collection mechanism; 71. Pressure sensor; 72. Infrared sensor; 73. LiDAR; 74. Real-sense depth camera. DETAILED DESCRIPTION

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific situation.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. mean 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 this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

[0033] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0034] Embodiment 1

[0035] Figure 1 An embodiment of a stair climbing transport robot of the present application is shown, see Figure 1 In this embodiment, the stair-climbing transport robot includes: a vehicle body 1, two sets of track assemblies 2 respectively arranged on both sides of the vehicle body 1 for movement, and a lifting assembly 3 arranged on one end of the vehicle body 1 for movement.

[0036] Among them, see Figure 1The lifting component 3 includes a telescopic member 31 disposed in the vehicle body 1, and at least one moving wheel 32 suspended under the vehicle body 1. The movable end of the telescopic member 31 extends to the bottom of the vehicle body 1 and is connected to the rotating shaft of each moving wheel 32, driving the movable end of the telescopic member 31 to extend and retract along the direction of the moving wheel 32 away from or close to the vehicle body 1, so as to change the distance from each moving wheel 32 to the bottom surface of the vehicle body 1. In this way, the height of the stair-climbing transport robot moving to one end during the movement is changed, thereby assisting the stair-climbing transport robot to complete the process of going up and down stairs. And this structure is hidden at the bottom of the stair-climbing transport robot, which can prevent the lifting component 3 from touching the surrounding people or objects during the movement of the equipment.

[0037] Further, see Figure 1 The tops of the two track assemblies 2 on the side close to each other are connected to the side wall of the vehicle body 1, and the bottom surface of each track assembly 2 exceeds the bottom surface of the vehicle body 1 by a preset distance to prevent the bottom surface of the vehicle body 1 from touching obstacles. The telescopic member 31 and each moving wheel 32 are located between the two track assemblies 2 to prevent the bottom surface of the vehicle body 1 from touching obstacles, while concealing the lifting assembly 3.

[0038] Further, see Figure 2 The telescopic member 31 is a structure in which a steering gear 311 is connected to a support arm 312. The steering gear 311 is arranged inside the vehicle body 1. An opening is arranged at the bottom of the vehicle body 1. The working end of the steering gear 311 is connected to one end of the support arm 312. The other end of the support arm 312 extends through the opening to the bottom surface of the vehicle body 1 and is vertically connected to the middle part of a round rod 313. The side wall of the round rod 313 is sleeved with four moving wheels 32. The axis of the round rod 313 is perpendicular to the moving direction of the vehicle body 1 to ensure that the vehicle body 1 can still move when one end is lifted.

[0039] In this embodiment, when transporting items between floors, the items can be placed on the vehicle body 1, and the two crawler assemblies 2 can be driven to move the vehicle body 1; when the stair-climbing transport robot needs to climb stairs, the movable end of the telescopic member 31 is controlled to extend and raise the head end of the vehicle body 1, so that the bottom of the two crawler assemblies 2 adjacent to the head end of the vehicle body 1 can be overlapped to the low-position steps and the subsequent high-position steps; when the stair-climbing transport robot needs to go down the stairs, the head end of the initial vehicle body 1 is suspended above the inclined surface of the stairs and is not unbalanced, and the control The movable end of the telescopic member 31 extends and makes the moving wheel 32 contact with the step. When the vehicle body 1 continues to move, the movable end of the telescopic member 31 is controlled to retract and the head end of the vehicle body 1 slowly falls, so that the bottom of the two crawler assemblies 2 adjacent to the head end of the vehicle body 1 can be overlapped with the high step and the subsequent low step. In this way, the process of the stair-climbing transport robot going up or down the stairs can be completed, and the structure is hidden at the bottom of the stair-climbing transport robot, which can prevent the lifting assembly 3 from touching the surrounding people or objects during the movement of the equipment.

[0040] Embodiment 2

[0041] In order to enable the stair climbing transport robot to move on the stair slope, based on the above embodiment, see Figure 2 and Figure 3 The crawler assembly 2 includes at least two first rollers 21 and at least two second rollers 22 which are arranged in parallel and linearly, and a crawler ring 23 which is sleeved outside each first roller 21 and each second roller 22;

[0042] Among them, see Figure 2 and Figure 3 The first roller 21 supports the inner top surface of the track ring 23, and the second roller 22 supports the inner bottom surface of the track ring 23. The inner top surface length of the track ring 23 is greater than the inner bottom surface length, so that the track ring 23 forms an inverted trapezoidal ring, so that the stair-climbing transport robot can move on non-planar structures, especially stair structures.

[0043] Further, see Figure 2 and Figure 3 The track assembly 2 also includes a motor 24 and a connecting plate 25. One end of each first roller 21 close to the lifting assembly 3 extends into the interior of the vehicle body 1 and is coaxially connected to the rotating shaft of a motor 24. One end of each second roller 22 close to the lifting assembly 3 is rotatably connected to one end of a connecting plate 25. The other end of each connecting plate 25 is connected to the side wall of the vehicle body 1. At the same time, each motor 24 is controlled to do work to drive each first roller 21 to rotate around its own axis, thereby driving the track ring 23 to rotate around its axis, and then driving the vehicle body 1 to move.

[0044] Further, see Figure 2 and Figure 3 The track assembly 2 also includes an outer gear ring 26. The outer side wall of each first roller 21 and the outer side wall of each second roller 22 are sleeved with at least one outer gear ring 26. The inner wall of the track ring 23 is provided with a tooth pattern adapted to each outer gear ring 26. Each outer gear ring 26 is gear-engaged with the inner wall of the track ring 23 to ensure that the track ring 23 will not slip during the rotation of each first roller 21 around its own axis.

[0045] In this embodiment, each motor 24 of the two track assemblies 2 is controlled to work, so that the two track rings 23 can be driven to rotate around their own axes respectively; when the two track rings 23 rotate in the same direction and at the same frequency, the stair-climbing transport robot can move in a straight line; when the two track rings 23 rotate in the same direction and at different frequencies, the stair-climbing transport robot can turn during the movement; when the two track rings 23 rotate in different directions and at the same frequency, the stair-climbing transport robot can turn on the spot; in this way, the stair-climbing transport robot can move in a more complex environment.

[0046] Embodiment 3

[0047] In order to make the stair climbing transport robot more convenient to use, based on the above embodiments, see Figure 2 and Figure 3 The stair-climbing transport robot also includes a power supply mechanism.

[0048] Among them, see Figure 2 and Figure 3 The power supply mechanism 24 includes a charging pile 41 and a battery 42 arranged inside the vehicle body 1; the charging pile 41 is provided with a flat support plate 411 and a baffle 412 standing on one side of the support plate 411, and a charging socket 413 is provided on the side of the baffle 412 adjacent to the support plate 411, and a side wall of the vehicle body 1 moving toward one end is provided with a charging connector 414 connected to the battery 42 and adapted to the charging socket 413, and the charging connector 414 is inserted into the charging socket 413 to charge the battery 42, and power various electrical equipment of the stair climbing transport robot through the battery 42.

[0049] Further, see Figure 2 and Figure 3 The stair-climbing transport robot also includes a cargo box 5 arranged on the vehicle body 1. The cargo box 5 is provided with a hollow cavity 51. The top of the cargo box 5 is connected to the cavity 51 and a box cover 52 is hinged. The cavity 51 of the cargo box 5 is used to hold items, and the box cover 52 can prevent items from falling out of the cargo box 5 during stair-climbing transportation.

[0050] Further, see Figure 2 and Figure 3 The stair-climbing transport robot also includes a human-machine interaction device 6, which is provided with a touch screen 61 and a speaker 62 installed on the top of the cargo box 5. The touch screen 61 is used to display icons or texts, and the operator can input commands to the stair-climbing transport robot by touching the displayed icons or texts on the touch screen 61, and the speaker 62 is used to broadcast voice information.

[0051] In this embodiment, the stair-climbing transport robot is provided with a charging pile 41, and can move to the charging pile 41 to charge when the power is insufficient; at the same time, a cargo box 5 is provided to place the items to be transported, and the items will not fall out of the cargo box 5 during transportation; in addition, a touch screen 61 and a speaker 62 are provided on the cargo box 5, and while inputting instructions to the stair-climbing transport robot, the touch screen 61 can display images or text information to the operator and broadcast voice. This improves the convenience of using the stair-climbing transport robot.

[0052] Embodiment 4

[0053] In order to adapt the stair-climbing transport robot to different application scenarios, based on the above embodiments, see Figure 2 and Figure 3 The stair-climbing transport robot also includes an information collection mechanism 7.

[0054] Among them, see Figure 2 and Figure 3 The information collection mechanism 7 is provided with a pressure sensor 71 , an infrared sensor 72 , a laser radar 73 , and a real-sense depth camera 74 .

[0055] Further, see Figure 2 and Figure 3 At least one pressure sensor 71 is provided between the cargo box 5 and the vehicle body 1. By analyzing the detection value of the pressure sensor 71, the weight of the items in the cargo box 5 can be known, so as to remind the operator according to the set load-bearing upper limit of the stair-climbing transport robot to avoid the stair-climbing transport robot being crushed due to overloading or affecting its service life.

[0056] Further, see Figure 2 and Figure 3 At least one infrared sensor 72 is provided at both ends of the bottom surface of the vehicle body 1 in its moving direction. The infrared sensor 72 is used to measure the distance from the bottom surface of the vehicle body 1 to the ground or the step plane. By calculating and analyzing the data detected by each infrared sensor 72, the body position state of the vehicle body 1 during the movement process can be known, and then the telescopic length of the active end of the telescopic member 31 is adjusted according to the preset parameters.

[0057] Further, see Figure 2 and Figure 3 The laser radar 73 is arranged on the cargo box 5. The laser radar 73 emits laser and measures the time for the reflected light to return. In this way, the three-dimensional data of the surrounding environment is measured, and then the data is processed by the algorithm to generate a high-precision three-dimensional point cloud map, which is used for SLAM (Simultaneous Localization and Mapping) to achieve accurate autonomous navigation.

[0058] Further, see Figure 2 and Figure 3 The real-sense depth camera 74 is installed on the side wall of the cargo box 5 near one end of the lifting component 3. It measures the depth information of the scene through infrared or other technologies to generate a more specific three-dimensional cloud point map, depth map and color image in front, and provide three-dimensional environmental information to assist SLAM in achieving autonomous navigation.

[0059] In this embodiment, the weight of the transported items is obtained based on information obtained from the pressure sensor 71, and the operator is prompted to avoid the stair-climbing transport robot. The stair-climbing transport robot obtains data on its body position, location, and surrounding environment based on information obtained from the infrared sensor 72, the lidar 73, and the real-sense depth camera 74. The stair-climbing transport robot performs different actions based on these data, including automatic navigation, obstacle avoidance, and going up and down stairs, so that the stair-climbing transport robot can adapt to different environments.

[0060] Embodiment 5

[0061] In order to realize intelligent control of the stair-climbing transport robot, the basic stair-climbing transport robot in the above embodiment further includes a central control mechanism arranged on the cargo box.

[0062] Among them, the central control mechanism is electrically connected to the servo 311, the motor 24, the touch screen 61, the speaker 62, the pressure sensor 71, the infrared sensor 72, the laser radar 73 and the real-sense depth camera 74 respectively. The central control mechanism pre-stores a number of control instructions. The central control mechanism receives signals from the touch screen 61, the pressure sensor 71, the infrared sensor 72, the laser radar 73 and the real-sense depth camera 74, and matches the corresponding control instructions to control the servo 311 and each motor 24 to work, control the touch screen 61 to display information, and control the speaker 62 to broadcast information.

[0063] It should be noted that this embodiment focuses on the control principle of the central control mechanism. The specific structure of the central control mechanism is not the focus of this embodiment and is the prior art. This embodiment and the accompanying drawings have given the installation position or area of ​​the central control mechanism, and the specific structure of the central control mechanism will not be repeated.

[0064] Similarly, the present embodiment focuses on the working principles of the servo 311, the motor 24, the touch screen 61, the speaker 62, the pressure sensor 71, the infrared sensor 72, the laser radar 73 and the real-sense depth camera 74. The specific structures of the servo 311, the motor 24, the touch screen 61, the speaker 62, the pressure sensor 71, the infrared sensor 72, the laser radar 73 and the real-sense depth camera 74 are not the focus of the present embodiment and are prior art. The present embodiment and the accompanying drawings have given the installation positions or areas of the servo 311, the motor 24, the touch screen 61, the speaker 62, the pressure sensor 71, the infrared sensor 72, the laser radar 73 and the real-sense depth camera 74, and the specific structures of the servo 311, the motor 24, the touch screen 61, the speaker 62, the pressure sensor 71, the infrared sensor 72, the laser radar 73 and the real-sense depth camera 74 are not repeated.

[0065] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application; the dimensions of the drawings are not related to the specific objects, and the dimensions of the objects can be changed arbitrarily.

Claims

1. A stair-climbing transport robot, characterized in that: include: Vehicle body; Two sets of crawler assemblies are respectively arranged on both sides of the vehicle body; The lifting assembly arranged at one end of the vehicle body moving direction includes a telescopic member arranged in the vehicle body and at least one moving wheel suspended under the vehicle body, wherein the movable end of the telescopic member extends to the bottom of the vehicle body and is connected to each moving wheel, driving the movable end of the telescopic member to extend and retract along the direction in which the moving wheel moves away from or close to the vehicle body, so as to change the distance from each moving wheel to the bottom surface of the vehicle body.

2. The stair-climbing transport robot according to claim 1, characterized in that: The tops of the two crawler assemblies on the sides close to each other are connected to the side walls of the vehicle body, the bottom surface of each crawler assembly exceeds the bottom surface of the vehicle body by a preset distance, and each moving wheel is located between two crawler assemblies; the telescopic part includes a steering gear arranged in the vehicle body, the bottom surface of the vehicle body is provided with an opening, the working end of the steering gear is connected to one end of a support arm, the other end of the support arm extends through the opening to the bottom surface of the vehicle body and is vertically connected to the middle part of a round rod, the side wall of the round rod is sleeved with at least two moving wheels, and the axis of the round rod is perpendicular to the moving box of the vehicle body.

3. The stair-climbing transport robot according to claim 2, characterized in that: The track assembly includes at least two first rollers and at least two second rollers which are arranged in parallel and linearly, and a track ring which is sleeved outside each first roller and each second roller; the first roller supports the inner top surface of the track ring, and the second roller supports the inner bottom surface of the track ring; the length of the inner top surface of the track ring is greater than the length of its inner bottom surface, so that the track ring forms an inverted trapezoidal ring.

4. The stair-climbing transport robot according to claim 3, characterized in that: One end of each first roller shaft close to the lifting assembly extends into the interior of the vehicle body and is coaxially connected to the rotating shaft of a motor. One end of each second roller shaft close to the lifting assembly is rotatably connected to one end of a connecting plate, and the other end of each connecting plate is connected to the side wall of the vehicle body.

5. The stair-climbing transport robot according to claim 4, characterized in that: The outer arm of each first roller shaft and the outer wall of each second roller shaft are sleeved with at least one outer toothed ring, the inner wall of the track ring is provided with teeth matching the teeth of each outer toothed ring, and each outer toothed ring is toothed with the teeth of the track ring.

6. The stair-climbing transport robot according to claim 5, characterized in that: It also includes a power supply mechanism, which is provided with a charging pile and a battery arranged inside the vehicle body; the charging pile is provided with a flat support plate and a baffle standing on one side of the support plate, and a charging socket is provided on a side of the baffle adjacent to the support plate; a side wall of the vehicle body moving toward one end is provided with a charging connector connected to the battery and adapted to the charging socket, and the charging connector is inserted into the charging socket to charge the battery.

7. The stair-climbing transport robot according to claim 6, characterized in that: The stair-climbing transport robot also includes a cargo box arranged on the vehicle body, the cargo box is provided with a hollow cavity, the top of the cargo box is connected to the cavity and a box cover is hingedly connected.

8. The stair-climbing transport robot according to claim 7, characterized in that: The stair-climbing transport robot also includes a human-machine interaction device, which is provided with a touch screen and a speaker installed on the top of the cargo box. The touch screen is used to display icons or text information and receive external touch operations, and the speaker is used to broadcast voice information.

9. The stair-climbing transport robot according to claim 8, characterized in that: It also includes an information collection mechanism, which includes a pressure sensor arranged between the cargo box and the vehicle body, an infrared sensor arranged on the bottom surface of the vehicle body, a laser radar arranged on the top surface of the cargo box, and a real-sensing depth camera arranged on the side wall of one end of the cargo box adjacent to the lifting component. The pressure sensor, the infrared sensor, the laser radar and the real-sensing depth camera are used to obtain information about the environment in which the vehicle body is located.

10. The stair-climbing transport robot according to claim 9, characterized in that: The system also includes a central control mechanism electrically connected to the servo, the motor, the touch screen, the speaker, the pressure sensor, the infrared sensor, the laser radar and the real-sense depth camera respectively. The central control mechanism pre-stores a plurality of control instructions. The central control mechanism receives signals from the touch screen, the pressure sensor, the infrared sensor, the laser radar and the real-sense depth camera, and matches corresponding control instructions to respectively control the servo and each motor to work, control the touch screen to display information, and control the speaker to broadcast information.

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