Three-rail transfer trolley

Abstract

The three-rail transfer trolley is used for transferring a photovoltaic cleaning robot and comprises a base, rails arranged on the base and a trolley capable of reciprocating on the rails, and the rails comprise an upper walking rail, a lower walking rail and a gear rail which are arranged in parallel; the gear track is located between the upper walking track and the lower walking track, the trolley comprises a walking frame, a first supporting frame and a second supporting frame, the first supporting frame and the second supporting frame are assembled on the walking frame, a parking frame is arranged above the first supporting frame and the second supporting frame, a driving mechanism is assembled on the walking frame, and the driving mechanism is connected with the parking frame. The driving mechanism comprises a motor and a walking gear, the walking gear is rotationally connected with the motor and meshed with the gear track, and a first supporting wheel matched with the upper walking track and a second supporting wheel matched with the lower walking track are arranged on the walking frame. By arranging the three-rail structure, the stability of the transfer trolley is improved, and meanwhile the equipment cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power station cleaning technology, and in particular to a three-track transfer vehicle. Background Art

[0002] Photovoltaic power generation is a clean energy technology. In order to ensure the power generation efficiency of photovoltaic panels, the surface of photovoltaic panels needs to be cleaned regularly. For the cleaning of photovoltaic panels, the industry has developed various types of photovoltaic cleaning robots to improve the cleaning efficiency. However, photovoltaic cleaning robots can usually only move on photovoltaic panel arrays that are connected to each other, and cannot move to unconnected photovoltaic panel arrays. In actual applications, for photovoltaic panel arrays arranged in rows, a photovoltaic cleaning robot is often required for each row of photovoltaic arrays, which greatly increases the cost of photovoltaic cleaning. In this regard, there are also solutions in the prior art that use a transfer vehicle to transport photovoltaic cleaning robots. Usually, the transfer vehicle adopts a multi-stage folding structure to achieve operation from a low position to a high position. This structural design usually has a complex control mechanism, many structural connections, and cannot be disassembled after assembly, resulting in invariants in transportation.

[0003] In view of this, it is necessary to propose a new technical solution to overcome the shortcomings of the prior art. Summary of the invention

[0004] In response to the above technical problems, the present application provides a three-track transfer vehicle with simple structure and stable operation.

[0005] In order to solve the above technical problems, the present application provides a three-track transfer vehicle for the transfer of photovoltaic cleaning robots, including a base, a track arranged on the base, and a trolley that can reciprocate on the track, the track includes an upper walking track, a lower walking track and a gear track arranged in parallel, the gear track is located between the upper walking track and the lower walking track, the trolley includes a walking frame, a first support frame and a second support frame assembled on the walking frame, a docking frame is arranged above the first support frame and the second support frame, a driving mechanism is assembled on the walking frame, the driving mechanism includes a motor and a walking gear, the walking gear is rotatably connected to the motor and meshes with the gear track, and the walking frame is provided with a first support wheel adapted to the upper walking track and a second support wheel adapted to the lower walking track. By setting a three-track structure, on the one hand, the stability of the overall operation of the transfer vehicle is increased, and on the other hand, the cost of the transfer vehicle is reduced.

[0006] Furthermore, the docking frame is assembled and fixed with the first support frame through a first sleeve, and the docking frame is assembled and fixed with the second support frame through a second sleeve; the first sleeve and the second sleeve are respectively provided with a first assembly hole and a second assembly hole, which are assembled and fixed with a first through hole and a second through hole provided on the first support frame and the second support frame. The angle and height of the docking frame can be adjusted by adjusting the position of the first sleeve and the first support frame and the position of the second sleeve and the second support frame.

[0007] Furthermore, an electric control unit is arranged on the first support frame, a photovoltaic panel is arranged outside the docking frame, the photovoltaic panel is electrically connected to the electric control unit, and the electric control unit provides power for the driving mechanism. The convenience of autonomous power supply for outdoor operation of the transfer vehicle is met by arranging the photovoltaic panel and the electric control unit connected thereto, thereby enhancing the adaptability of the product.

[0008] Furthermore, the docking frame is provided with a limit mechanism for locking the position of the photovoltaic cleaning robot, and the walking frame is provided with a locking member that is movably connected to the upper walking track and / or the lower walking track. The setting of the limit structure enhances the safety performance of the photovoltaic cleaning robot during transportation, avoiding accidents such as falling off due to vibration.

[0009] Furthermore, the limiting mechanism includes a mounting seat and an electric push rod assembled on the docking frame, the electric push rod is assembled and fixed to the mounting seat, the photovoltaic cleaning robot is provided with a position sensor, the mounting seat is provided with a magnetic steel adapted to the position sensor, one side of the position sensor is provided with a fixing seat, and the electric push rod can be inserted into the fixing seat. The photovoltaic cleaning robot position is identified by the induction of the magnetic steel and the sensor, the structure is simple and the reliability is high, and the insertion of the electric push rod and the fixing seat ensures that the photovoltaic cleaning robot is locked with the transfer vehicle after reaching the designated position, increasing the safety of the overall operation.

[0010] Furthermore, the mounting seat includes a first mounting column and a second mounting column sleeved outside the first mounting column and fixed to the first mounting column by screw assembly, the first mounting column is provided with a magnetic steel mounting seat with adjustable position, and the magnetic steel is fixed to the magnetic steel mounting seat by screws. Setting the mounting seat as the first mounting column and the second mounting column with adjustable assembly height can enhance the overall strength of the mounting column on the one hand, and enhance the overall adjustability of the product to make it more adaptable on the other hand.

[0011] Furthermore, a limit locking block is arranged above the electric push rod, the limit locking block is assembled on the mounting seat, and the limit locking block is formed with a receiving portion for accommodating the fixing seat and a locking hole adapted to the electric push rod. The limit locking block can prevent the electric push rod from falling out after being inserted into the fixing seat, thereby ensuring the reliability of the assembly of the two.

[0012] Furthermore, the first support frame and the second support frame are respectively assembled and fixed to the docking frame through an adapter seat, the adapter seat includes a top wall and ears extending downward from both sides of the top wall, the top wall and the ears form a U-shaped structure, the top wall is assembled on the support frame, the ears are provided with mounting holes, the first support frame and the second support frame are respectively provided with limiting holes corresponding to the mounting holes, and bolts pass through the mounting holes and the limiting holes to assemble and fix the adapter seat to the first support frame and the second support frame.

[0013] Furthermore, a third support frame is provided between the first support frame and the traveling frame, and the third support frame, the first support frame and the traveling frame are assembled to form a triangular structure. The third support frame is provided to enhance the overall stability of the supporting structure of the transfer vehicle.

[0014] Furthermore, the driving mechanism also includes a roller that rolls with the side wall of the gear track, the walking frame is provided with a limit plate for limiting the gear, the limit plate is provided with a receiving groove, and the gear fixing seat is provided with a power transmission shaft received in the receiving groove.

[0015] Compared with the prior art, the present application has the following beneficial effects: the present application reduces the usage of gear tracks and reduces the cost of the transfer vehicle by setting a three-track structure, and at the same time, the setting of three tracks increases the stability of the transfer vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a main view of a three-track transfer vehicle of an exemplary embodiment.

[0017] Figure 2 It is a three-dimensional schematic diagram of a three-track transfer vehicle of an exemplary embodiment.

[0018] Figure 3 It is a schematic diagram of partial assembly of a three-track transfer vehicle according to an exemplary embodiment.

[0019] Figure 4 yes Figure 2 A partial enlarged schematic diagram in the middle.

[0020] Figure 5 yes Figure 3 A partial enlarged schematic diagram of point B in the middle.

[0021] Figure 6 It is a three-dimensional assembly diagram of a driving mechanism of an exemplary embodiment.

[0022] Figure 7 It is a schematic diagram of the working status of a transfer vehicle of an exemplary embodiment. Reference Numbers

[0023] Three-track transfer vehicle 100 Upper walking track 1, Lower walking track 2, Gear track 3, meshing surface 30, gear hole 301, Guide rail 31, first guide surface 310, second guide surface 311, Base 11, Track base 32, Walking frame 4, first supporting frame 40, first through hole 401, The second support frame 41, the second through hole 410, the first sleeve 42, first assembly hole 420, second sleeve 43, second assembly hole 430, The third support frame 44, the adapter seat 45, the top wall 450, Ear 451, mounting hole 452, first support wheel 46, Second support wheel 47 Docking frame 5, photovoltaic panel 50, electric control unit 51, Limiting mechanism 6, electric push rod 61, mounting seat 62, The first mounting column 620, the second mounting column 621, the magnetic steel mounting seat 622, Magnetic steel 623, limit locking block 63, first locking portion 630, The first locking hole 631, the second locking portion 632, the second locking hole 633, Connecting portion 634, receiving portion 635, fixing seat 7, Driving mechanism 8, motor 81, travel gear 82, Gear fixing seat 83, bottom plate 830, hollow receiving portion 831, Side plate 832, center hole 833, top plate 834, Power transmission shaft 835, limiting plate 836, receiving groove 837, Roller 84, locking member 85, assembly plate 9. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is claimed, but merely represents the selected embodiments of the present application.

[0025] 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" and the like indicating orientations or positional relationships are 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.

[0026] In addition, it should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information.

[0027] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically limited. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0028] 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 or an electrical connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] Please refer to Figures 1 to 7 As shown, a three-track transfer vehicle 100 is used for the transportation of a photovoltaic cleaning robot, including a base 11, a track arranged on the base 11, and a trolley that can reciprocate on the track. The track includes an upper walking track 1, a lower walking track 2 and a gear track 3 arranged in parallel, and the gear track 3 is located between the upper walking track 1 and the lower walking track 2. The trolley includes a walking frame 4, a first support frame 40 and a second support frame 41 assembled on the walking frame 4, and a docking frame 5 is arranged above the first support frame 40 and the second support frame 41. A driving mechanism 8 is assembled on the walking frame 4, and the driving mechanism 8 includes a motor 81 and a walking gear 82, and the walking gear 82 is rotatably connected to the motor 81 and meshes with the gear track 3. The walking frame 4 is provided with a first support wheel 46 adapted to the upper walking track 1 and a second support wheel 47 adapted to the lower walking track 2. The upper walking track and the lower walking track described in the present application are both of profile structure, the gear track 3 includes a meshing surface 30 and guide rails 31 located on both sides of the meshing surface 30, the meshing surface 30 is provided with a gear hole 301 adapted to the walking gear 82, the guide rail 31 includes an intersecting first guide surface 310 and a second guide surface 311, wherein the first guide surface 310 is connected to the meshing surface 30, the second guide surface 311 is connected to the track base 32, and the track base 32 is arranged parallel to the meshing surface 30. The present application increases the stability of the overall operation of the transfer vehicle by setting a three-track structure on the one hand, and reduces the overall cost of the transfer vehicle by setting only one gear track 3 on the other hand.

[0031] In one embodiment, the docking frame 5 is assembled and fixed with the first support frame 40 through the first sleeve 42, and the docking frame 5 is assembled and fixed with the second support frame 41 through the second sleeve 43. The height of the first support frame 40 is greater than the height of the second support frame 41. The angle formed by the docking frame 5 and the walking frame 4 is an acute angle. Of course, the size of the angle can be achieved by adjusting the assembly height of the first sleeve 42 and the first support frame 40 according to the needs of the actual use scenario, and can also be achieved by adjusting the assembly height of the second sleeve 43 and the second support frame 41 at the same time. The first sleeve 42 and the second sleeve 43 are respectively provided with a first assembly hole 420 and a second assembly hole 430, which are assembled and fixed with the first through hole 401 and the second through hole 410 provided on the first support frame 40 and the second support frame 41. As a preferred solution, the first sleeve 42 and the second sleeve 43 are rectangular hollow structures respectively, the first sleeve 42 is provided with a plurality of first assembly holes 420 at intervals along the length direction, and the second sleeve 43 is provided with a plurality of second assembly holes 430 at intervals along the length direction; the first support frame 40 is provided with a plurality of first through holes 401 at intervals along the length direction, and the second support frame 41 is provided with a plurality of second through holes 410 at intervals along the length direction, and the first assembly holes 420, the second assembly holes 430, the first through holes 401 and the second through holes 410 have the same hole spacing to ensure that the docking frame 5 always maintains the same plane. This solution can adjust the angle and height of the docking frame 5 by adjusting the position of the first sleeve 42 and the first support frame 40 and the position of the second sleeve 43 and the second support frame 41. The overall structure is simple and easy to operate, and it is also easy to disassemble and transport.

[0032] Specifically, in order to enhance the strength and stability of the first support frame 40, the first support frame 40 includes vertical beams and horizontal beams assembled with each other, and an electric control unit 51 is arranged on the first support frame 40, and the electric control unit 51 includes at least an electrically connected central controller, a communication module and a battery. A photovoltaic panel 50 is arranged on the outside of the docking frame 5, and the photovoltaic panel 50 is electrically connected to the electric control unit 51, and the electric control unit 51 provides power for the driving mechanism 8. Specifically, the cable of the photovoltaic panel 50 is connected to the inverter, and the inverter is connected to the battery of the electric control unit 51, and supplies power to the motor 81 of the driving mechanism. By providing a photovoltaic panel and using the photovoltaic panel to generate electricity to provide power to the transfer vehicle, the problem of autonomous power supply for outdoor operations of the transfer vehicle is solved, and the adaptability of the product is enhanced.

[0033] The docking frame 5 is provided with a limit mechanism 6 for locking the position of the photovoltaic cleaning robot. The limit mechanism 6 includes a mounting seat 62 and an electric push rod 61 assembled on the docking frame 5, and the electric push rod 61 is assembled and fixed to the mounting seat 62. The photovoltaic cleaning robot is provided with a position sensor, and the mounting seat 62 is provided with a magnetic steel 623 adapted to the position sensor. A fixing seat 7 is provided on one side of the position sensor, and the electric push rod 61 can be inserted into the fixing seat 7. Specifically, the fixing seat 7 is a long strip-shaped structure with a runway-shaped slot hole in the center. The fixing seat 7 partially extends out of the outer end of the photovoltaic cleaning robot body. When the position sensor detects the magnetic steel 623, it sends a signal to the central controller. The central controller controls the electric push rod 61 to switch from the zero position state to the travel limit state, and the extended push rod passes through the slot hole and is inserted into the fixing seat 7. In order to prevent the electric push rod 61 from slipping off after being inserted into the fixing seat 7, in one embodiment of the present application, a limit locking block 63 is provided above the electric push rod 61. The limit locking block 63 is assembled on the mounting seat 62, and the limit locking block 63 is formed with a receiving portion 635 for accommodating the fixing seat 7 and a locking hole adapted to the electric push rod 61. Specifically, the limit locking block 63 includes a first locking portion 630, a second locking portion 632 and a connecting portion 634 connecting the first locking portion and the second locking portion 632. The first locking portion 630 and the second locking portion 632 are arranged in parallel and in the same direction and form a U-shaped structure with the connecting portion 634. A receiving portion 635 for accommodating the fixing seat 7 is formed between the first locking portion 630 and the second locking portion 632. A first locking hole 631 is provided on the first locking portion 630, and a second locking hole 633 is provided on the second locking portion 632. The axis of the first locking hole 631 coincides with the axis of the second locking hole 633, thereby ensuring the reliability of the assembly of the electric push rod 61, the fixing seat 7 and the limit locking block 63. The present application monitors the position of the photovoltaic cleaning robot through the induction of magnets and sensors, has a simple structure and high reliability, and utilizes the insertion of the electric push rod and the fixing seat 7 to enhance the safety of the photovoltaic cleaning robot and the overall operation of the transfer vehicle after the robot reaches the designated position; by further setting a limit structure to enhance the safety performance of the photovoltaic cleaning robot during the transfer process, accidents such as falling off due to vibration can be avoided.

[0034] In the present application, the docking frame 5 is configured as a rectangular frame assembled by a crossbeam and a longitudinal beam, and the mounting seat 62 is configured on the crossbeam of the docking frame 5, and includes a first mounting column 620 and a second mounting column 621 sleeved on the outside of the first mounting column 620, the second mounting column 621 is assembled and fixed to the first mounting column 620 by screws, and a position-adjustable magnetic steel mounting seat 622 is provided on the first mounting column 620, and the magnetic steel is fixed to the magnetic steel mounting seat 622 by screws. The magnetic steel mounting seat 622 is a tongue-shaped structure, and a long strip slot is provided on it. The first mounting column 620 and the second mounting column 621 are provided with a plurality of positioning holes, and the screws pass through the corresponding positioning holes to assemble and fix the first mounting column 620 and the second mounting column 621; the screws pass through the long strip slot to assemble the magnetic steel mounting seat 622 on the mounting seat 62, and because the long strip slot can realize stepless adjustment of the assembly height, the height of the magnetic steel mounting seat 622 can be conveniently adjusted as needed. The present application sets the mounting seat 62 as a first mounting column 620 and a second mounting column 621 with adjustable assembly height, which can enhance the overall strength of the mounting column on the one hand, and enhance the overall adjustability of the product to make it more adaptable on the other hand.

[0035] The first support frame 40 and the second support frame 41 are respectively assembled and fixed with the docking frame 5 through the adapter seat 45. The adapter seat 45 includes a top wall 450 and ears 451 extending downward from both sides of the top wall 450. The top wall 450 and the ears 451 form a U-shaped structure. The top wall 450 is assembled on the crossbeam of the docking frame 5. The ears 451 are provided with mounting holes 452. The first support frame 40 and the second support frame 41 are respectively provided with limiting holes (not shown) corresponding to the mounting holes 452. Bolts pass through the mounting holes 452 and the limiting holes to assemble and fix the adapter seat 45 with the first support frame 40 and the second support frame 41. Of course, the top wall 450 of the adapter seat 45 can also be welded to the crossbeam of the docking frame 5. The purpose of providing an adapter 45 to connect the docking frame 5 with the first support frame and the second support frame 41 is to facilitate the transportation of the transfer vehicle. When the transfer vehicle is not used, the first support frame 40 and the second support frame 41 can be folded with the docking frame 5 by loosening the bolts without completely disassembling them. When in use, just tighten the bolts, which shortens the assembly time and facilitates use.

[0036] A third support frame 44 is provided between the first support frame 40 and the traveling frame 4. The third support frame 44 is assembled with the first support frame 40 and the traveling frame 4 to form a triangular structure to increase the overall stability and strength of the transfer vehicle. In one embodiment, both ends of the third support frame 44 are assembled and fixed with the first support frame 40 and the traveling frame 4 through an adapter; such an arrangement can facilitate the folding and storage of the third support frame 44; the adapter structure used for assembling the third support frame with the first support frame and the traveling frame described in this application is the same as the adapter structure for assembling the first support frame, the second support frame and the docking frame 5, and will not be repeated here. Indeed, both ends of the third support frame 44 can be directly welded and fixed with the first support frame 40 and the traveling frame 4, and welding and fixing can further enhance the overall strength of the support frame, but the convenience of disassembly and storage needs to be lost. The present application scheme enhances the overall stability of the support structure of the transfer vehicle by setting the third support frame 44.

[0037] The walking frame 4 is provided with a locking member 87 that is movably sleeved with the upper walking rail 1 and / or the lower walking rail 2. Specifically, the walking frame 4 is assembled with a screw at a position relative to the upper walking rail 1 and / or the lower walking rail 2, and the end of the screw at least partially extends into the upper walking rail 1 and / or the lower walking rail 2 and is assembled with a nut, and the upper walking rail 1 and / or the lower walking rail 2 limit the nut to prevent the screw from slipping out of the upper walking rail 1 and / or the lower walking rail 2.

[0038] The driving mechanism 8 also includes a roller 84 that rolls with the side wall of the gear track 3. The walking frame 4 is provided with a limit plate 836 for limiting the gear, and the limit plate 836 is provided with a receiving groove 837, and the gear fixing seat 83 is provided with a power transmission shaft 835 received in the receiving groove 837. The receiving groove 837 is a runway-shaped slot, and the power transmission shaft 835 can have a certain displacement in the receiving groove 837 to adapt to the position deviation of the driving mechanism 8 caused by vibration; the motor 81 described in the present application adopts a worm gear motor, and the self-locking performance of the transfer vehicle can reduce a locking mechanism, thereby simplifying the product structure and reducing costs to a certain extent. The gear fixing seat 83 includes a bottom plate 830, a side plate 832 and a top plate 834. A hollow accommodating portion 831 is provided at the center of the bottom plate 830. The travel gear is at least partially accommodated in the hollow accommodating portion 831. Four shaft holes are symmetrically provided in front and rear of the hollow accommodating portion 831. The rotating shaft of the roller 84 passes through the shaft holes and is fixed on the bottom plate 830. The top plate 834 is parallel to the bottom plate 830. The power transmission shaft 835 is arranged on the top plate 834. A center hole 833 is provided on the side plate 832. The motor shaft of the motor 81 passes through the center hole 833 and drives the travel gear to rotate. Specifically, the motor 81 is fixed on the assembly plate 9. The assembly plate 9 and the side plate 832 of the gear fixing seat 83 are assembled and fixed by screws so that the motor 81 and the gear are assembled and fixed. In order to protect the travel gear and the motor, a protective shell is provided outside the driving mechanism.

[0039] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A three-track transfer vehicle for the transfer of a photovoltaic cleaning robot, characterized in that: The invention comprises a base, a track arranged on the base and a trolley which can reciprocate on the track, the track comprising an upper walking track, a lower walking track and a gear track arranged in parallel, the gear track is located between the upper walking track and the lower walking track, the trolley comprises a walking frame, a first supporting frame and a second supporting frame assembled on the walking frame, a docking frame is arranged above the first supporting frame and the second supporting frame, a driving mechanism is assembled on the walking frame, the driving mechanism comprises a motor and a walking gear, the walking gear is rotatably connected to the motor and meshes with the gear track, and the walking frame is provided with a first supporting wheel adapted to the upper walking track and a second supporting wheel adapted to the lower walking track.

2. The three-track transfer vehicle according to claim 1, characterized in that: The docking frame is assembled and fixed to the first supporting frame through the first sleeve, and the docking frame is assembled and fixed to the second supporting frame through the second sleeve; the first sleeve and the second sleeve are respectively provided with a first assembly hole and a second assembly hole, which are assembled and fixed to the first through hole and the second through hole provided on the first supporting frame and the second supporting frame.

3. The three-track transfer vehicle according to claim 2, characterized in that: An electric control unit is arranged on the first support frame, a photovoltaic panel is arranged on the outside of the docking frame, the photovoltaic panel is electrically connected to the electric control unit, and the electric control unit provides power for the driving mechanism.

4. The three-track transfer vehicle according to any one of claims 1 to 3, characterized in that: The docking frame is provided with a limiting mechanism for locking the position of the photovoltaic cleaning robot, and the walking frame is provided with a locking member movably sleeved with the upper walking track and / or the lower walking track.

5. The three-track transfer vehicle according to claim 4, characterized in that: The limiting mechanism includes a mounting seat and an electric push rod assembled on the docking frame. The electric push rod is assembled and fixed to the mounting seat. A position sensor is provided on the photovoltaic cleaning robot. A magnet matching the position sensor is provided on the mounting seat. A fixing seat is provided on one side of the position sensor. The electric push rod can be inserted into the fixing seat.

6. The three-track transfer vehicle according to claim 5, characterized in that: The mounting seat includes a first mounting column and a second mounting column which is sleeved on the outside of the first mounting column and fixed to the first mounting column by screw assembly. The first mounting column is provided with a position-adjustable magnetic steel mounting seat, and the magnetic steel is fixed to the magnetic steel mounting seat by screws.

7. The three-track transfer vehicle according to claim 6, characterized in that: A limit locking block is arranged above the electric push rod, and the limit locking block is assembled on the mounting seat. The limit locking block is formed with a receiving portion for accommodating the fixing seat and a locking hole adapted to the electric push rod.

8. The three-track transfer vehicle according to any one of claims 5 to 7, characterized in that: The first support frame and the second support frame are respectively assembled and fixed to the docking frame through an adapter seat, and the adapter seat includes a top wall and ears extending downward from both sides of the top wall, and the top wall and the ears form a U-shaped structure. The top wall is assembled on the support frame, and the ears are provided with mounting holes. The first support frame and the second support frame are respectively provided with limiting holes corresponding to the mounting holes, and bolts pass through the mounting holes and the limiting holes to assemble and fix the adapter seat with the first support frame and the second support frame.

9. The three-track transfer vehicle according to claim 8, characterized in that: A third support frame is provided between the first support frame and the walking frame, and the third support frame forms a triangular structure after being assembled with the first support frame and the walking frame.

10. The three-track transfer vehicle according to any one of claims 1 to 3 or 9, characterized in that: The driving mechanism also includes a roller that rolls with the side wall of the gear track, the traveling gear is arranged on a gear fixing seat, the traveling frame is provided with a limiting plate for limiting the traveling gear, the limiting plate is provided with a receiving groove, and the gear fixing seat is provided with a power transmission shaft received in the receiving groove.

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