Telescopic portal frame type GIS transportation equipment

Abstract

The telescopic portal frame type GIS transportation equipment comprises a truss, the two ends of the truss are connected to the top of a multi-section telescopic hydraulic cylinder, a crane is arranged on the truss, a hydraulic input port is formed in the side wall of the lowermost section of the multi-section telescopic hydraulic cylinder, and an intelligent walking trolley is arranged at the bottom of the multi-section telescopic hydraulic cylinder. The intelligent walking trolley is connected with the lower driving wheel set, and the GIS equipment interval unit is placed on the intelligent walking trolley to be transported. The device can be conveniently placed and brought into a GIS installation plant, has the capability of working in an indoor narrow environment, is suitable for both indoor operation and outdoor operation, and is wide in application range.

Description

Technical Field

[0001] This application relates to the field of GIS transportation equipment, specifically to a telescopic gantry-type GIS transportation equipment. Background Technology

[0002] Gas-Insulated Switchgear (GIS) is a high-performance, high-voltage power transmission and distribution equipment widely used in substations. It is a compact unit that seals all primary equipment in a substation (excluding transformers), including circuit breakers, disconnectors, grounding switches, voltage transformers, current transformers, surge arresters, busbars, connectors, and outgoing terminals, within a grounded metal casing filled with pressurized SF6 (sulfur hexafluoride) gas as insulation and arc-quenching medium. Since the last century, the rapid development of the power industry and the continuous increase in transmission voltage levels have led to large-scale inter-regional power grid interconnections, placing high demands on the reliability of power transmission and distribution equipment. Compared to open-type substations (AIS), GIS, due to its superior SF6 gas insulation, significantly shortens the insulation distance, resulting in a size and footprint only 10% to 30% of traditional AIS substations. This is a significant advantage for land-scarce urban, mountainous, and underground substation applications. GIS (Gas Insulated Switchgear) systems occupy an important position in power transmission and transformation systems due to their advantages such as small footprint, strong environmental adaptability, high reliability, convenient installation, and low maintenance workload. However, because GIS equipment has high environmental requirements during installation and disassembly, and despite the protection of its metal casing, outdoor installations are still significantly affected by wind, rain, and extreme weather, thus, the installation of GIS equipment is gradually shifting from outdoor to indoor. However, there are many inconveniences in installing and transporting GIS equipment within the installation facility. Currently, the main problems are as follows:

[0003] Transportation within the installation plant is inconvenient.

[0004] Because the space inside the installation workshop is extremely limited compared to the outside, such as the height restrictions of the entrance and exit gates and the height restrictions of the internal ceiling, large lifting equipment simply cannot enter the workshop to carry out operations. Moreover, the weight of the basic unit of GIS switchgear is generally more than 3 tons, and ordinary conventional equipment simply cannot bear such a large load. Therefore, the transportation of GIS switchgear inside the installation workshop is extremely inconvenient.

[0005] Existing transportation methods cannot achieve precise displacement.

[0006] Existing transportation methods mostly involve lifting the GIS (Gas Insulated Switchgear) unit from its base before transport. However, because these methods involve lifting the base unit a considerable distance, it's necessary to connect it to the installation location after transport. Since the connection requirements between GIS base units are high, excessive lifting can prevent this connection work. Therefore, a device is needed that can transport GIS units to the installation location without requiring significant lifting from the bottom.

[0007] The existing work methods are labor-intensive, time-consuming, and labor-intensive for the workers.

[0008] Current operational methods still rely on manual transportation. For example, this involves laying rollers (thick-walled steel pipes) or sliding plates (steel plates) on the road surface, then using manual labor to pry open the base frame of the GIS foundation unit to slowly transport it to the installation location. Alternatively, a small tank is placed under the base frame of the GIS electrical unit, and then a forklift is inserted at both ends, with manual labor pulling the forklift to move the foundation unit to the installation location. Both of these methods suffer from low efficiency, high manpower consumption, difficulty in control, and a tendency to damage the floor.

[0009] Most existing operating methods generate vibrations, which may cause damage to the internal components of the equipment.

[0010] Currently, methods such as laying rollers (or steel plates) for transportation by manpower or using small tanks to place under the chassis cannot avoid the problem of equipment vibration and swaying caused by uneven ground. If there is strong vibration and swaying, it is difficult to avoid damage and collisions to the internal parts of the equipment. Tools and transportation methods with relatively higher cushioning capacity are needed. Summary of the Invention

[0011] The purpose of this application is to provide a telescopic gantry-type GIS transport equipment, which is compact in size and can be easily placed and brought into the GIS installation plant. It has the ability to work in narrow indoor environments, and is suitable for both indoor and outdoor operations, with a wide range of applications.

[0012] To achieve the above objectives, this application provides the following technical solution:

[0013] This application provides a telescopic gantry-type GIS transport equipment, including a gantry frame. The two ends of the gantry frame are connected to the top of a multi-segment telescopic hydraulic cylinder. A gantry crane is installed on the gantry frame. A hydraulic input port is provided on the side wall of the lowest segment of the multi-segment telescopic hydraulic cylinder. An intelligent walking trolley is provided at the bottom of the multi-segment telescopic hydraulic cylinder. The intelligent walking trolley is connected to the drive wheel set below. GIS equipment interval units are placed on the intelligent walking trolley for transport.

[0014] The ends of the gantry are equipped with hydraulic cylinder protective covers to prevent misalignment or tilting of the multi-segment telescopic hydraulic cylinders during the telescopic process.

[0015] The telescopic gantry-type GIS transportation equipment also includes a mobile power and control module. The mobile power and control module provides power to the intelligent walking vehicle and hydraulic pressure to the multi-segment telescopic hydraulic cylinder. At the same time, it receives wireless signals to control and adjust the output hydraulic pressure to control the lifting and lowering of the hydraulic cylinder.

[0016] The intelligent walking vehicle has a hydraulic cylinder fixing port on its top, which has a groove of a certain depth to accommodate a multi-segment telescopic hydraulic cylinder. Foldable auxiliary load-bearing plates are set on both sides of the intelligent walking vehicle. The front of the intelligent walking vehicle is equipped with a wireless signal receiver, an LCD touch screen, and an infrared laser rangefinder. The back of the intelligent walking vehicle is equipped with a ranging data receiver that works with the infrared laser rangefinder. A foldable auxiliary support rod is set below the foldable auxiliary load-bearing plate. When the foldable auxiliary load-bearing plate is unfolded, the foldable auxiliary support rod assists the foldable auxiliary load-bearing plate in supporting and bearing a certain weight.

[0017] The upper layer of the foldable auxiliary load-bearing plate is made of high-roughness rubber pad, and there are six high-strength springs evenly distributed below the pad. Below the springs is a load-bearing plate made of high-strength alloy.

[0018] The main driving power source of the drive wheel assembly consists of a rotary drive motor and a travel drive motor. When the rotary drive motor receives a signal and receives power, it controls the rotary motor drive gear to rotate. The rotary motor drive gear drives the rotary motor driven gear to rotate through gear meshing. The rotary motor driven gear is integrated with the lower transmission rod. After the transmission rod rotates, it drives the gear conveyor belt for belt drive. The gear conveyor belt drives the main wheel connected to the chassis to rotate. When the travel drive motor receives a signal and receives power, it drives the travel motor drive gear to rotate. The travel motor drive gear drives the travel motor driven gear to rotate through gear meshing. The travel motor driven gear drives the travel motor driven auxiliary gear to rotate through gear meshing. The travel motor driven auxiliary gear drives the main wheel drive gear to rotate through gear meshing, thus enabling the bottom main wheel to complete the rotation and travel action.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention employs a small transport device, which is compact in size and can be easily placed and brought into the GIS installation plant. It has the ability to work in narrow indoor environments, and is suitable for both indoor and outdoor operations, with a wide range of applications.

[0021] The innovative lifting method employing multi-stage telescopic hydraulic cylinders to elevate GIS equipment makes the entire transportation process more convenient, eliminating the need to remove the device from the bottom, simplifying the work process, and improving installation efficiency. Furthermore, this innovative multi-stage telescopic hydraulic cylinder lifting method is applicable to various models of GIS equipment and can also be used for transporting other equipment, demonstrating its versatility.

[0022] Its innovative multi-stage telescopic hydraulic cylinder lifting method is applicable to various models of GIS equipment and can also be used for the transportation of other equipment, making it quite versatile.

[0023] The lifting method adopted is hydraulic cylinder lifting, which has a high upper limit on lifting weight and meets the basic requirements for lifting GIS foundation units.

[0024] A novel solution using an infrared laser rangefinder to measure the distance between trolleys not only provides accurate distance measurement but also ensures that the X-axis and Y-axis distances between the trolleys are equal, enabling the trolleys to travel at equal distances without misalignment. This accuracy guarantees the safe and reliable transportation of the equipment.

[0025] The drive wheel module uses a hub motor for stepless speed regulation, resulting in more precise and reliable movement.

[0026] By adopting a hoisting method for the GIS equipment, the equipment is in a semi-suspended state during transportation. This prevents the equipment from being damaged by vibrations and swaying caused by uneven ground during transportation, thus reducing the possibility of equipment damage, greatly extending the service life of the equipment, and improving the reliability of the equipment.

[0027] Due to its unique structural design, this invention can be used not only for lifting GIS equipment but also for transporting other complex equipment. It has multiple versatility features and can be used to solve the problem of inconvenient transportation of equipment in other narrow environments.

[0028] This invention is highly automated, saves time and effort, and is more likely to be favored by users. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the connection structure between the truss and the intelligent walking vehicle in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of an intelligent walking vehicle according to an embodiment of the application. Figure 1 ;

[0033] Figure 4 This is a schematic diagram of an intelligent walking vehicle according to an embodiment of this application. Figure 2 ;

[0034] Figure 5 This is a schematic diagram of an intelligent walking vehicle according to an embodiment of this application. Figure 3 ;

[0035] Figure 6 This is a schematic diagram of the drive wheel assembly structure according to an embodiment of this application; Figure 7 This is a schematic diagram of vertical movement according to an embodiment of this application; Figure 8 This is a schematic diagram of the intelligent walking vehicle ranging according to an embodiment of this application; Figure 9 This is a schematic diagram of the overall usage state structure of an embodiment of this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] like Figures 1-9 As shown, this application embodiment provides a telescopic gantry-type GIS transportation equipment, including a gantry frame 1. The two ends of the gantry frame 1 are connected to the top of a multi-segment telescopic hydraulic cylinder 3. A gantry crane 2 is installed on the gantry frame 1. A hydraulic input port 4 is provided on the side wall of the lowest segment of the multi-segment telescopic hydraulic cylinder 3. An intelligent walking trolley 5 is provided at the bottom of the multi-segment telescopic hydraulic cylinder 3. The intelligent walking trolley 5 is connected to the drive wheel set 6 below. The GIS equipment interval unit 7 is placed on the intelligent walking trolley 5 for transportation.

[0039] The end of the frame 1 is equipped with a hydraulic cylinder protective cover to prevent the multi-segment telescopic hydraulic cylinder 3 from being misaligned or tilted during the telescopic process.

[0040] The telescopic gantry-type GIS transportation equipment also includes a mobile power and control module 8. The mobile power and control module 8 supplies power to the intelligent walking vehicle 5 and provides hydraulic pressure to the multi-segment telescopic hydraulic cylinder. At the same time, it receives wireless signals to control and adjust the output hydraulic pressure to control the lifting and lowering of the hydraulic cylinder.

[0041] like Figures 3-5As shown, the intelligent walking vehicle is equipped with a hydraulic cylinder fixing port 501. The hydraulic cylinder fixing port 501 has a groove design of a certain depth to place the multi-segment telescopic hydraulic cylinder 3. Its size has a suitable tolerance with the hydraulic cylinder. When the hydraulic cylinder is placed on it after bearing the load, the groove can restrict and fix the hydraulic cylinder base to prevent the hydraulic cylinder from sliding on the surface of the vehicle. The appropriate tolerance design can facilitate the installation of the hydraulic cylinder. The foldable auxiliary load-bearing plate 502 has a high-roughness rubber pad as its upper layer. Six high-strength springs are evenly distributed on each side of the pad. Below the springs is a load-bearing plate made of high-strength alloy. The entire system is controlled by an internal electronic control system of the trolley. When the trolley is unloaded, it can be folded into the side of the trolley to reduce its size. When the trolley is loaded and the load is lifted to a certain height by a hydraulic cylinder or gantry crane, the lower load-bearing plate is raised and unfolded by the electronic control system, placing part of the load on this auxiliary load-bearing plate. The friction between the load and the upper high-roughness rubber pad prevents the trolley and load from swaying due to inertia during movement. The springs in the middle greatly increase the buffering capacity, significantly improving transportation safety and reducing the possibility of cargo collisions and personnel accidents during transport. The wireless signal receiver 503 connects to the internal electronic control system of the AGV. It can send electrical signals to the control system wirelessly, thereby issuing corresponding commands to the control and transmission systems, causing the drive wheel set 6 to move accordingly. This achieves the goals of wireless remote control, convenient operation by personnel, and improved operator safety, enhancing both the convenience and safety of equipment operation. The LCD touchscreen 504 displays detailed information such as the AGV's real-time speed, the AGV wheel's real-time angle, the load weight, and the distance between the two AGVs. The touchscreen design also allows personnel to control the AGV via touch operation in special circumstances (such as wireless remote control failure). The infrared laser rangefinder 505 and the ranging data receiver 507 work together. The infrared laser rangefinder 505 emits a signal, and the ranging data receiver 507 receives the signal. When two infrared laser rangefinders emit signals and the ranging data receiver receives the signals, they obtain the distance values ​​at the two corresponding locations. When the two distance values ​​are approximately equal by moving the trolley, it indicates that the two trolleys are approximately on the same vertical line in the Y-axis direction and parallel to the X-axis direction. When the folding auxiliary load-bearing plate 502 is unfolded, its folding auxiliary support rod 506 can assist the load-bearing plate in supporting and bearing a certain weight. When the folding auxiliary load-bearing plate 502 needs to be retracted, a certain pushing force is applied at the middle connection of the folding auxiliary support rod 506 to retract the folding auxiliary support rod 506.

[0042] like Figure 6As shown, the main driving power source of the drive wheel assembly 6 consists of a rotary drive motor 601 and a walking drive motor 602. When the rotary drive motor 601 receives a signal and obtains power, it controls the rotary motor drive gear 604 to rotate. The rotary motor drive gear 604 drives the rotary motor driven gear 605 to rotate through gear meshing. The rotary motor driven gear 605 is integrated with the transmission rod below it. After driving the transmission rod to rotate, it drives the gear conveyor belt 606 to perform belt drive. The gear conveyor belt 606 drives the main wheel connected to the chassis to rotate. When the walking drive motor 602 receives a signal and obtains power, it drives the walking motor drive gear 608 to rotate. The walking motor drive gear 608 drives the walking motor driven gear 609 to rotate through gear meshing. The walking motor driven gear 609 drives the walking motor driven auxiliary gear 610 to rotate through gear meshing. The walking motor driven auxiliary gear 610 drives the main wheel drive gear 607 to rotate through gear meshing, thus enabling the bottom main wheel to complete the rotation and walking action.

[0043] like Figure 7-9 As shown, after the overhead crane 2 is connected to the GIS equipment via hooks and other tools, the GIS equipment is lifted by the multi-segment telescopic hydraulic cylinder 3. After being lifted to a suitable height, the intelligent walking trolley 5 is wirelessly remotely controlled to ensure that the laser ranging data D1, D2, D3, and D4 are approximately equal (with an error of ±10mm) and are the program-set values ​​(these values ​​are determined by the length of the GIS equipment, and different set values ​​are used for GIS equipment of different lengths). When the above data reach the required equality, a green light illuminates on the display screen and a beeping sound is emitted, indicating that the four trolleys have reached the point where they are parallel to each other on the X-axis, approximately equal in distance on the Y-axis, and aligned vertically. Synchronous movement can then begin, ensuring that the movement does not result in misalignment or inconsistent movement distances, thus guaranteeing the accuracy and safety of the overall equipment movement. The folding auxiliary load-bearing plate 502 is unfolded, and the multi-segment telescopic hydraulic cylinder 3 is retracted to place part of the weight of the GIS equipment on the folding auxiliary load-bearing plate 502, thereby achieving the purpose of stable transportation of the GIS equipment.

[0044] Working process of the multi-functional base frame clamping device

[0045] First, install the gantry crane 1, hydraulic cylinder protective cover, overhead crane 2, multi-segment telescopic hydraulic cylinder 3, intelligent walking trolley 5, and drive wheel set 6. Then, input hydraulic oil through hydraulic input port 4 and connect the hydraulic pump to generate hydraulic pressure, raising the multi-segment telescopic hydraulic cylinder 3 to a suitable height. Next, turn on the power to the intelligent walking trolley 5 and move the device to a suitable position. Then, adjust the position of the intelligent walking trolley 5 wirelessly to align the infrared laser rangefinder 505 and the infrared ranging data receiver 507. Move the trolley wirelessly to adjust the distance between the four trolleys to a suitable position, ensuring that the laser ranging data D1, D2, D3, and D4 are approximately equal (with an error within ±10mm) and are the program-set values ​​(this value is determined by the length of the GIS equipment). When the above data reach the required equality, a green light illuminates on the display screen and a beeping sound is emitted as a notification. Once the vehicles are parallel to each other on the X-axis, approximately equidistant on the Y-axis, and aligned vertically, they can begin synchronous movement, ensuring no misalignment or inconsistent movement distances. Then, the hook or rope is connected to the overhead crane 2, and then to a suitable position on the GIS equipment. After securing the hook or rope, the multi-stage telescopic hydraulic cylinder 3 is raised again, lifting the GIS equipment above the ground and beyond the height of the intelligent walking trolley 5. The lifting stops then, and the side folding auxiliary load-bearing plate 502 of the intelligent walking trolley 5 is unfolded via wireless remote control. After unfolding, the multi-stage telescopic hydraulic cylinder 3 is retracted to lower the GIS equipment until part of its weight rests on the folding auxiliary load-bearing plate 502. At this point, the intelligent walking trolley 5 can be operated wirelessly to achieve stable transportation of the GIS equipment.

[0046] The technical effects of this invention are: 1. It solves the problem of inconvenient transportation within the installation workshop during the indoor installation of GIS.

[0047] This invention employs an electric drive wheel, driven by a motor, enabling stepless speed regulation and precise displacement. A hydraulic cylinder is mounted on the drive wheel, which is connected to the GIS foundation unit via a small gantry crane. One crane is placed at each end of the GIS base frame to lift the GIS foundation unit. Transportation of the GIS foundation unit can then be achieved via manual or remote-controlled motor drive. The multi-segment telescopic hydraulic cylinder has a small retractable size and high load-bearing capacity, meeting the needs of indoor transportation scenarios for GIS foundation units.

[0048] 2. Solved the problem that existing operating methods could not achieve precise alignment.

[0049] This invention solves the problem of precise docking of GIS base units by using the stepless speed regulation of a hub motor to first transport the GIS base unit to the installation position, and then precisely adjusting the lifting height by adjusting the hydraulic input.

[0050] 3. Improved installation efficiency and reduced labor intensity for workers.

[0051] With this invention, operators only need to place the multi-segment telescopic hydraulic cylinder on the intelligent traveling trolley, and then place the small gantry crane and gantry equipment on the hydraulic cylinder. They can then move and align the trolley by controlling the movement, and connect the GIS base unit equipment to the gantry crane to lift and transport the GIS equipment. The operation is simple, significantly reducing manual labor, lowering labor intensity, shortening the transportation time of the GIS, and allowing for direct and precise docking without having to lower the GIS base unit first – a one-step process. The number of operators can also be greatly reduced, saving human resources.

[0052] Reduce installation environment requirements and equipment transportation costs

[0053] This invention integrates lifting and moving functions, enabling the lifting and movement of GIS foundation units without the need for hoisting equipment. This significantly reduces the requirements for the transportation environment of GIS foundation units, eliminating the need for overhead cranes on indoor roofs and reducing construction costs for the transportation environment. Compared to renting hydraulic flatbed trucks and hoisting equipment, this invention has lower manufacturing costs and can be used repeatedly over a long period.

[0054] Reduce the possibility of equipment damage during transportation.

[0055] By employing a lifting device, the equipment is transported in a semi-suspended state during transportation, which provides greater cushioning and avoids damage to the internal structure of the equipment caused by uneven ground, significantly reducing the possibility of damage to the equipment during transportation.

[0056] This invention is applicable to other complex devices.

[0057] In addition to GIS basic unit equipment, this invention can also be used to hoist other types of equipment, such as goods and small vehicles, in relatively narrow indoor environments, demonstrating high versatility.

[0058] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A telescopic gantry-type GIS transportation equipment, characterized in that, The system includes a gantry frame, with both ends connected to the top of a multi-segment telescopic hydraulic cylinder. A gantry crane is mounted on the gantry frame. A hydraulic input port is provided on the side wall of the lowest segment of the multi-segment telescopic hydraulic cylinder. An intelligent walking trolley is provided at the bottom of the multi-segment telescopic hydraulic cylinder. The intelligent walking trolley is connected to the drive wheel set below. The GIS equipment interval unit is placed on the intelligent walking trolley for transportation.

2. The telescopic gantry-type GIS transportation equipment according to claim 1, characterized in that, The ends of the gantry are equipped with hydraulic cylinder protective covers to prevent misalignment or tilting of the multi-segment telescopic hydraulic cylinders during the telescopic process.

3. The telescopic gantry-type GIS transportation equipment according to claim 1, characterized in that, The telescopic gantry-type GIS transportation equipment also includes a mobile power and control module. The mobile power and control module provides power to the intelligent walking vehicle and hydraulic pressure to the multi-segment telescopic hydraulic cylinder. At the same time, it receives wireless signals to control and adjust the output hydraulic pressure to control the lifting and lowering of the hydraulic cylinder.

4. The telescopic gantry-type GIS transportation equipment according to claim 1, characterized in that, The intelligent walking vehicle has a hydraulic cylinder fixing port on its top, which has a groove of a certain depth to accommodate a multi-segment telescopic hydraulic cylinder. Foldable auxiliary load-bearing plates are set on both sides of the intelligent walking vehicle. The front of the intelligent walking vehicle is equipped with a wireless signal receiver, an LCD touch screen, and an infrared laser rangefinder. The back of the intelligent walking vehicle is equipped with a ranging data receiver that works with the infrared laser rangefinder. A foldable auxiliary support rod is set below the foldable auxiliary load-bearing plate. When the foldable auxiliary load-bearing plate is unfolded, the foldable auxiliary support rod assists the foldable auxiliary load-bearing plate in supporting and bearing a certain weight.

5. A telescopic gantry-type GIS transportation equipment according to claim 4, characterized in that, The upper layer of the foldable auxiliary load-bearing plate is made of high-roughness rubber pad, and there are six high-strength springs evenly distributed below the pad. Below the springs is a load-bearing plate made of high-strength alloy.

6. The telescopic gantry-type GIS transportation equipment according to claim 1, characterized in that, The main driving power source of the drive wheel assembly consists of a rotary drive motor and a travel drive motor. When the rotary drive motor receives a signal and receives power, it controls the rotary motor drive gear to rotate. The rotary motor drive gear drives the rotary motor driven gear to rotate through gear meshing. The rotary motor driven gear is integrated with the lower transmission rod. After the transmission rod rotates, it drives the gear conveyor belt for belt drive. The gear conveyor belt drives the main wheel connected to the chassis to rotate. When the travel drive motor receives a signal and receives power, it drives the travel motor drive gear to rotate. The travel motor drive gear drives the travel motor driven gear to rotate through gear meshing. The travel motor driven gear drives the travel motor driven auxiliary gear to rotate through gear meshing. The travel motor driven auxiliary gear drives the main wheel drive gear to rotate through gear meshing, thus enabling the bottom main wheel to complete the rotation and travel action.

Images