Combined type liftable anti-falling platform for electric wheel assembly and use method of combined type liftable anti-falling platform

Abstract

The invention relates to an assembling auxiliary platform for an electric wheel of a mine truck, in particular to a combined type lifting anti-falling platform for assembling the electric wheel and a using method, and aims to solve the problems that a traditional assembling platform is poor in safety and insufficient in adaptability, and an automatic system is complex in structure, high in manufacturing cost and not suitable for surrounding operation for fixing workpieces. The device comprises five separable working units and a power source supply device for providing power for the five working units. Each working unit comprises a supporting mechanism, a lifting mechanism, an operation platform and a moving mechanism, the five working units can be in butt joint and locked through a plurality of connecting pieces arranged on bottom frames and supporting plates of the working units, and therefore an annular platform with a notch is formed through combination and used for surrounding a mine truck electric wheel assembly. Therefore, a high-altitude annular assembly operation space and a ground operation station are provided. According to the invention, the installation of the mine truck electric wheel assembly is realized through a simple and reliable mechanical structure.

Description

Technical Field

[0001] This invention relates to an assembly auxiliary platform for electric wheels of mining trucks, specifically to a combined liftable anti-fall platform for assembling electric wheels and its usage method. Background Technology

[0002] The electric wheels of mining trucks are their core drive components, characterized by their compact structure, high output torque, and high reliability. They are widely used in large, rigid mining trucks weighing over 150 tons. These electric wheels are enormous in size and weight; for example, the smallest model has a diameter of approximately 1.5 meters and weighs about 8 tons, while larger models can weigh over 25 tons. Assembly is a crucial step in the manufacturing and repair of electric wheels, requiring operators to tighten bolts and install components around the entire circumference of the electric wheel assembly from a height of 1.2 to 2 meters above the ground. This places high demands on the safety, stability, ease of operation, and adaptability to products of different diameters on the work platform.

[0003] Currently, the traditional method commonly used in assembly workshops for working around large, fixed workpieces is to directly erect temporary, simple scaffolding or fixed steps around the workpiece. This method has significant drawbacks: First, erecting and dismantling these scaffolding and steps is time-consuming, labor-intensive, and cannot be quickly moved or repositioned. Second, these temporary platforms are unstable, lack continuous and reliable fall protection railings, posing a high risk of personnel falling. Third, the fixed working height makes it difficult to flexibly adjust to the optimal working height for different products according to work characteristics and process requirements, affecting assembly efficiency and quality. Furthermore, simple platforms usually cannot form a continuous working plane that precisely surrounds the workpiece, requiring operators to frequently move up and down and change positions, further increasing the difficulty and safety risks of the operation.

[0004] It is worth noting that existing technologies already exist for the maintenance of electric wheels. For example, Chinese patent CN119490145A discloses a mining truck electric wheel maintenance system. This system integrates a three-axis heavy-duty positioner, a disassembly and assembly robot, and an electric lifting platform to achieve automatic workpiece rotation and disassembly. However, its core design relies on moving the workpiece to adapt to a fixed workstation, and the system is complex and expensive. In the production assembly process, however, workpieces are often in a fixed position, and many assembly processes still rely on human flexibility and judgment. Therefore, the existing automated maintenance system's technical approach and high cost are not suitable for solving the safety, flexibility, and efficiency problems faced by manually assembling large, fixed workpieces.

[0005] In summary, existing traditional assembly platforms cannot be quickly transferred and repeatedly deployed, have poor safety, and lack adaptability; existing automated systems are complex in structure, expensive, and unsuitable for circumferential operations involving fixed workpieces. Summary of the Invention

[0006] The purpose of this invention is to overcome the technical problems of poor safety and insufficient adaptability of traditional assembly platforms in the prior art, as well as the complex structure, high cost and unsuitability for fixed workpiece surrounding operations of the automated system. In order to provide a combined liftable anti-fall platform for electric wheel assembly and a method of use.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A modular liftable fall arresting platform for electric wheel assembly is characterized by comprising five separable working units and a power source supply device for providing power to the five working units. Each of the aforementioned working units includes a support mechanism, a lifting mechanism, an operating platform, and a moving mechanism; The support mechanism includes a base frame, with multiple ground support columns evenly arranged on the outer bottom of the base frame; the operating platform includes a support plate and a fence set on the outer edge of the support plate. The lifting mechanism includes multiple lifting columns and at least one fluid actuator; each lifting column includes an outer column and an inner column; the lower end of each outer column is fixed to the top of the base frame and corresponds to the ground support column, and the upper end of each inner column is fixedly connected to the bottom of the support plate, and each inner column is provided with a mechanical locking structure for locking the height of the lifting column. The cylinder end of the fluid actuator is hinged to the top of the base frame via a first hinge seat, and the actuator rod end is hinged to the bottom of the support plate via a second hinge seat. Its driving medium input end is connected to the driving medium output end of the power source supply device, and is used to drive the fluid actuator to extend and retract. The moving mechanism includes multiple swivel casters disposed at the bottom of the base frame and adjustment components connected to the swivel casters; the adjustment components are used to control the swivel casters to descend to contact the ground and move the working unit, or to control the swivel casters to rise so that the ground support column supports the ground; The five working units can be interlocked and locked together by multiple connectors set on their base frame and support plate, thereby forming a ring platform with a notch, which is used to surround the mining truck electric wheel assembly to provide a high-altitude assembly work space and a ground operation station.

[0008] Furthermore, at least one of the work units is provided with an openable safety door on its fence, forming a fence with a door; The safety door is equipped with anti-fall bolts; The work unit equipped with the safety door is also fixedly equipped with a ladder, which is used for operators to enter the operating platform through the safety door.

[0009] Furthermore, each of the bottom frames includes an outer support and a crossbar support, with both ends of the crossbar support fixedly connected to the inner side of the outer support; The bottom of the outer support is fixedly connected to the upper ends of the plurality of ground support columns, and its top, opposite to the ground support columns, is fixedly connected to the lower end of the outer column; the top of the outer support is connected to the cylinder end of the fluid actuator unit via a first hinge seat. The bottom of the crossbar bracket is fixedly connected to the upper end of at least one of the ground support columns, and its top, opposite to the ground support column, is fixedly connected to the lower end of the outer column.

[0010] Furthermore, the adjusting component includes a connecting plate connected to the swivel caster, a support threaded column connected to the connecting plate, and a handwheel for driving the support threaded column to rotate; the support threaded column is threadedly connected to the outer bracket or the crossbar bracket. Rotating the handwheel can raise and lower the connecting plate and swivel casters by rotating the supporting threaded column on the outer bracket or crossbar bracket.

[0011] Furthermore, the mechanical locking structure includes a plurality of limiting holes and limiting pins disposed on the inner column along the height direction; The limiting pin can be inserted into the limiting hole to achieve mechanical locking after the fluid actuator raises the operating platform to the target height. The connector is a quick clamp. When the five working units are combined, the quick clamps fix and lock the adjacent working units together to form a ring platform with a notch. The first hinge seat is a hinge pin seat, and the second hinge seat is a fisheye pin seat; The hinge pin seat and the fisheye pin seat are respectively fitted with pins for hinged connection between the cylinder end and the actuator end of the fluid actuator unit; Both ends of the pin are equipped with retaining rings.

[0012] Furthermore, it also includes multiple annular notch adjustment plates; The outer edge diameter of the plurality of annular notch adjustment plates is greater than the inner edge diameter of the annular platform formed by the combination of the five working units; the inner edge diameter of each annular notch adjustment plate is different and is smaller than the inner edge diameter of the annular platform formed by the combination of the five working units. When the five working units are combined, the annular notch adjustment plate can be set on the inner edge of the operating platform. By replacing the annular notch adjustment plate with a different inner edge size, the inner edge diameter of the combined operating platform can be reduced, thereby adapting to mining truck electric wheel assemblies with different outer diameter specifications.

[0013] Furthermore, each of the aforementioned working units contains three ground support columns and three lifting columns; Two of the three ground support columns and lifting columns are connected to the outer support; the remaining three ground support columns and lifting columns are connected to the crossbar support. The lifting column is provided with diagonal reinforcing ribs between itself and the outer support and the crossbar support; Both of the aforementioned lifting columns are provided with diagonal reinforcing ribs between themselves and the base frame; The number of fluid actuators in each of the aforementioned working units is one.

[0014] Furthermore, the fluid actuator is a hydraulic cylinder; The power supply device includes a hydraulic station, an electrical control cabinet, an oil circuit separator with multiple output ends, multiple electromagnetic directional valves, multiple stacked pressure reducing valves, and multiple one-way throttle valves; each of the one-way throttle valves includes a stacked hydraulic control one-way valve and a stacked one-way throttle valve connected in sequence. The hydraulic station includes an oil tank, a suction filter, a motor, a variable vane pump, a tubular check valve, and a pressure gauge switch; The oil tank is equipped with a level gauge and a filler port. The output end of the motor is connected to the pump shaft of the variable vane pump. The inlet of the variable vane pump is connected to the suction filter located in the oil tank, and its outlet is connected to the inlet of the tubular check valve. The outlet of the tubular check valve is connected to the pressure gauge switch and the inlet of the oil circuit separator block, respectively. The outlet of the pressure gauge switch is connected to the system pressure gauge. An air cooler for cooling is provided between the variable vane pump and the oil tank. The oil circuit separator has multiple outlets, each of which is connected to the inlet of the solenoid directional valve via a stacked pressure reducing valve. The stacked pressure reducing valve is equipped with a pressure gauge. The working port of the solenoid directional valve is connected to port A of the hydraulic cylinder via a stacked hydraulic control check valve and a stacked one-way throttle valve connected in sequence. Port B of the hydraulic cylinder is connected to the return port of the solenoid directional valve via a stacked one-way throttle valve and a stacked hydraulic control check valve connected in sequence. The output terminals of the electrical control cabinet are respectively connected to the control terminals of the motor, air cooler, multiple stacked pressure reducing valves, multiple electromagnetic directional valves, multiple stacked hydraulic control check valves, and stacked one-way throttle valves, thereby driving the hydraulic cylinder to extend and retract.

[0015] Furthermore, the fluid actuator is a double-acting cylinder; The power supply device includes an electrical control cabinet, an air compressor, a pressure reducing valve, an air distributor with multiple output ends, and multiple two-position five-way reversing valves. The output terminals of the electrical control cabinet are respectively connected to the control terminals of the air compressor, the pressure reducing valve, and multiple two-position five-way reversing valves; The input end of the pressure reducing valve is connected to the output end of the air compressor, and its output end is connected to the input end of the air distributor. The multiple output ends of the air distributor are respectively connected to the input end of a two-position five-way directional valve. The first working end and the second working end of each two-position five-way directional valve are respectively connected to the rodless chamber inlet and the rod chamber inlet of a double-acting cylinder.

[0016] Meanwhile, the present invention also provides a method for using a combined liftable fall-prevention platform for electric wheel assembly, which is characterized by including the following steps: Step 1: Assemble the above-mentioned combined liftable fall arrestor platform for electric wheel assembly; Step 2: Move the five working units around the mining truck electric wheel assembly using the omnidirectional casters in the moving mechanism. After enclosing the five working units, lock and fix them with multiple connectors to form a ring platform with a notch. Step 3: Operate the adjustment components to raise the swivel casters, so that the ground support column is stably supported on the ground; Step 4: Start the power supply device to drive the fluid actuator to extend, thereby raising the operating platform to the predetermined assembly height. When the predetermined assembly height is reached, the lifting column is mechanically locked by the mechanical locking structure on the inner column. Step 5: Operators can choose to enter the operating platform to perform high-altitude assembly of the mining truck electric wheel assembly, or stand on the ground at the gap to perform low-level operations. Step 6: Platform Recycling S6.1 After the assembly of the mining truck electric wheel assembly is completed, the mechanical lock of the lifting column is released, the operating fluid actuator retracts, the operating platform is lowered to the initial position, and the locking state of the connecting parts is released. S6.2. Operate the adjustment components to lower the swivel casters to contact the ground, and then move the five working units to complete the use of the combined liftable anti-fall platform for electric wheel assembly.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a modular liftable anti-fall platform for electric wheel assembly. Through the design of five independent working units that are combined during assembly and separated after operation, the platform's handling convenience and storage efficiency are greatly improved. A specially designed notch not only provides alignment margin for platform deployment but also constitutes a safe entry and exit and ground operation station, allowing operators to flexibly choose between high-altitude platform operation or low-level ground operation according to process requirements. This significantly improves the adaptability of large workpiece surround assembly and the flexibility of work arrangement. It overcomes the limitations of existing technologies, such as complex structure, high cost, and reliance on workpiece movement. With a simple and reliable mechanical structure, it achieves safe, efficient, and low-cost surround operation of fixed workpieces, perfectly adapting to the inherent process of production assembly.

[0018] (2) The present invention provides a modular liftable anti-fall platform for electric wheel assembly. By setting safety doors with anti-fall pins and fixed ladders on the fence of the working unit, it provides operators with a standardized, safe and convenient access route. This effectively avoids the risk of falling when personnel climb over the fence, while ensuring rapid evacuation in emergency situations, thus raising the overall safety of the platform to a new level.

[0019] (3) The present invention provides a combined liftable anti-fall platform for electric wheel assembly. Through a base frame structure consisting of an outer support and a crossbar support, the stress points of the support columns, lifting columns, and fluid actuators are rationally distributed and reinforced. This design significantly enhances the overall rigidity and structural stability of the bottom of each working unit, ensuring that the platform does not undergo harmful deformation during lifting and load-bearing operations, providing a stable and reliable foundation for the upper operating platform. Simultaneously, a mechanical adjustment component using a handwheel-driven threaded column is employed to control the lifting of the omnidirectional casters, resulting in a simple, reliable structure with a self-locking function. This design allows the working unit to quickly, effortlessly, and reliably switch between mobility flexibility and operational stability without external power, reducing operational complexity and maintenance costs.

[0020] (4) The present invention provides a combined liftable anti-fall platform for electric wheel assembly, which provides multi-level safety and convenience protection by integrating mechanical pin locking, quick clamp connection, and specific structures such as hinges and fisheye pin seats. The mechanical locking serves as a safety redundancy for the hydraulic or pneumatic system to prevent the platform from falling accidentally; the quick clamp enables quick disassembly and locking between multiple units; the fisheye pin seat can automatically compensate for the centering error during installation and lifting, reducing the requirements for machining and assembly accuracy, and the use of a pin with a limit spring prevents the pin from accidentally coming out, further improving safety.

[0021] (5) The present invention provides a modular liftable anti-fall platform for electric wheel assembly. By adding replaceable annular notch adjustment plates of different sizes, the same platform can be adapted to electric wheel assemblies of mining trucks with various outer diameter specifications by quickly replacing the adjustment plates. This design greatly expands the versatility of the platform, avoids the need to customize special platforms for different products, and significantly reduces the purchase cost of equipment and the difficulty of warehousing management.

[0022] (6) The present invention provides a modular liftable anti-fall platform for electric wheel assembly. Through optimized design, the number of ground support columns and lifting columns in each working unit is reduced to three, and a single fluid actuator is used for drive. Diagonal reinforcing ribs ensure the strength of key nodes. This minimized and optimized structural design, while meeting load-bearing and stability requirements, minimizes the weight, material cost, and manufacturing cost of individual working units, ensuring the overall stability of the platform structure composed of five units. This is particularly suitable for applications with high cost control requirements.

[0023] (7) This invention provides a combined liftable anti-fall platform for electric wheel assembly. By using a variable vane pump as the power core, it can automatically adjust the output flow according to the load demand, achieving energy saving and soft start. The stacked pressure reducing valve provides an independent and precisely adjustable working pressure for the oil inlet of each hydraulic cylinder, ensuring uniform load at each lifting point and smooth, non-skewed platform lifting. The stacked hydraulic control check valve forms a reliable hydraulic lock, which can reliably maintain pressure at any position for a long time, preventing the platform from accidentally sliding down due to leakage or pipeline rupture; the stacked one-way throttle valve realizes bidirectional independent adjustment of the extension and retraction speed of the hydraulic cylinder, making the platform lifting process controllable and stable. The addition of the air cooler effectively controls the hydraulic oil temperature, ensuring the stability and reliability of the system under long-term continuous operation. The entire hydraulic system has high force density, stable output, strong resistance to load changes, and high control precision, making it particularly suitable for heavy-duty lifting scenarios that require synchronization and safe pressure maintenance. The system is mature and has rich maintenance experience.

[0024] (8) This invention provides a combined liftable anti-fall platform for electric wheel assembly, offering a simple and efficient alternative power system implementation scheme based on pneumatic transmission. This scheme utilizes the widely available compressed air sources in the workshop, supplying air through an air compressor, with a pressure reducing valve uniformly regulating and providing a stable primary pressure. A two-position five-way directional valve directly controls the reciprocating motion of the double-acting cylinder, resulting in rapid reversing and fast response. The pneumatic system itself has advantages such as simple structure, high degree of component standardization, light weight, and relatively low cost. Its convenient medium acquisition and compressibility give the system natural buffering characteristics and a certain overload protection capability. In an assembly workshop environment with a stable and clean air source, this scheme provides users with a power option that is quick to deploy, easy to maintain, and economical in operating costs. It is particularly suitable for work environments with high lifting speed requirements but less stringent continuous pressure holding requirements than hydraulic systems, demonstrating good environmental adaptability and economy.

[0025] (9) This invention provides a method for using a liftable anti-fall platform for assembling electric wheels. This method clearly defines standardized operating procedures for the entire process from platform assembly, positioning, adjustment, operation to retrieval. Following this method ensures that the platform is used correctly, safely, and efficiently, maximizing its design advantages. Standardized procedures help reduce misoperation, ensure the safety of operators, and ensure the quality and efficiency of assembly operations, enabling the platform's technical benefits to be realized stably and reliably in practical applications. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an embodiment of a combined liftable fall protection platform for electric wheel assembly according to the present invention; Figure 2 This is a schematic diagram of the usage state of an embodiment of the present invention (the power supply device is not shown). Figure 3 This is a structural schematic diagram of another embodiment of the present invention (the power supply device is not shown). Figure 4 This is a schematic diagram of the main structure of an embodiment of the present invention (the power supply device is not shown). Figure 5 for Figure 4 Enlarged view at point M; Figure 6 for Figure 4 A schematic diagram of the structure of China Mobile; Figure 7 This is a bottom view of the structure of an embodiment of the present invention (the power supply device is not shown). Figure 8 This is a top view of an embodiment of the present invention (the operating platform and power supply device are not shown). Figure 9This is a schematic diagram of the connection structure of the support mechanism, lifting mechanism and moving mechanism in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of a working unit in an embodiment of the present invention (the power supply device is not shown). Figure 11 This is a structural schematic diagram of another view of a working unit in an embodiment of the present invention (the power supply device is not shown). Figure 12 This is a schematic diagram of the connection structure between the hydraulic cylinder and the power supply device in an embodiment of the present invention (the electrical connection relationship between the electrical control cabinet and each component is not shown).

[0027] The attached figures are labeled as follows: 1-Support mechanism, 11-Base frame, 12-Ground support column, 13-Outer support, 14-Horizontal support, 15-Diagonal reinforcing rib, 2-Lifting mechanism, 21-Lifting column, 211-Outer column, 212-Inner column, 213-Limiting hole, 214-Limiting pin, 22-Hydraulic cylinder, 23-Hinge pin seat, 24-Fisheye pin seat, 25-Pin shaft, 26-Limiting snap ring, 3-Operating platform, 31-Support plate, 32-Fence, 33-Ladder, 34-Annular notch adjusting plate, 4-Moving mechanism, 41-Universal caster, 42-Connecting plate, 43 - Support threaded column, 44- Handwheel, 5- Power supply device, 51- Hydraulic station, 511- Oil tank, 512- Level gauge, 513- Filler port, 514- Suction filter, 515- Motor, 516- Air cooler, 517- Pipe-type check valve, 518- System pressure gauge, 519- Pressure gauge switch, 52- Variable vane pump, 53- Oil circuit separator block, 54- Solenoid directional valve, 551- Stacked hydraulic check valve, 552- Stacked one-way throttle valve, 56- Stacked pressure reducing valve, 561- Pressure reducing valve pressure gauge, 6- Quick clamp. Detailed Implementation

[0028] To better understand the purpose, structure, and function of this invention, the following detailed description, in conjunction with the accompanying drawings, provides an information on a liftable anti-fall platform for electric wheel assembly and its usage method.

[0029] This invention discloses a liftable fall-prevention platform for assembling electric wheels, providing a circular fall-prevention platform for operators to stand on during the assembly process of electric wheels for mining trucks. Figures 1-11 As shown, it includes: five separable working units, an adjustment plate 34, and a power supply device 5 that provides power to the five working units; the five working units can be interlocked to form a ring platform with a notch, which surrounds the mining truck electric wheel assembly, providing assembly work space, and the notch facilitates personnel to operate or enter directly from the ground.

[0030] Each working unit includes a support mechanism 1, a lifting mechanism 2, an operating platform 3, and a moving mechanism 4.

[0031] The support mechanism 1 includes a base frame 11, with multiple ground support columns 12 evenly arranged on the outer bottom of the base frame 11; the operating platform 3 includes a support plate 31 and a fence 32 disposed on the outer edge of the support plate 31; wherein, the support plate 31 is fan-shaped or trapezoidal. In this embodiment, at least one working unit has an openable safety door on its fence 32, forming a fence 32 with a door; the safety door is equipped with a fall arrestor pin; the working unit with the safety door is also fixedly equipped with a ladder 33, which is used for operators to enter the operating platform 3 through the safety door.

[0032] When the five working units are combined, the annular notch adjustment plate 34 can be set on the inner edge of the operating platform 3 to reduce the inner ring diameter of the combined operating platform 3, thereby adapting to mining truck electric wheel assemblies with different outer diameter specifications.

[0033] Each base frame 11 includes an outer support 13 and a crossbar support 14. The two ends of the crossbar support 14 are fixedly connected to the inner side of the outer support 13. The bottom of the outer support 13 is fixedly connected to the upper ends of multiple ground support columns 12, and its top, opposite to the ground support columns 12, is fixedly connected to the lower end of the outer column 211. The top of the outer support 13 is connected to the cylinder end of the fluid actuator via a first hinge seat. The bottom of the crossbar support 14 is fixedly connected to the upper end of at least one ground support column 12, and its top, opposite to the ground support column 12, is fixedly connected to the lower end of the outer column 211. In this embodiment, each working unit has three ground support columns 12; two of the three ground support columns 12 are connected to the outer support 13; the remaining three ground support columns 12 are connected to the crossbar support 14.

[0034] In other embodiments, the number of ground support columns 12 may be four, five, or six, but at least three are required. Each of the five working units' fences 32 is equipped with a safety gate; alternatively, none of the five working units' fences 32 may be equipped with safety gates. If no safety gates are provided, the operating platform 3 can be accessed via a climbing device.

[0035] The lifting mechanism 2 includes multiple lifting columns 21 and at least one fluid actuator; each lifting column 21 includes an outer column 211 and an inner column 212; the lower end of each outer column 211 is fixed to the top of the base frame 11 and corresponds to the ground support column 12, and the upper end of each inner column 212 is fixedly connected to the bottom of the support plate 31, and each inner column 212 is provided with a mechanical locking structure for locking the height of the lifting column 21; in this embodiment, the number of lifting columns 21 in each working unit is three; two of the three lifting columns 21 are connected to the outer support 13; the remaining three lifting columns 21 are connected to the crossbar support 14; diagonal reinforcing ribs 15 are provided between the lifting column 21 and the outer support 13 and the crossbar support 14. The mechanical locking structure includes multiple limiting holes 213 and limiting pins 214 along the height direction provided on the inner column 212; the limiting pins 214 can be inserted into the limiting holes 213 to achieve mechanical locking after the fluid actuator raises the operating platform 3 to the target height.

[0036] In other embodiments, the number of lifting columns 21 may be four, five, or six, but at least three must be provided. The mechanical locking structure may also employ other structures with locking functions, such as an electromagnetic locking structure or other manual locking structures, to lock the height of the lifting columns 21.

[0037] The cylinder end of the fluid actuator is hinged to the top of the base frame 11 via a first hinge seat, and the actuator rod end is hinged to the bottom of the support plate 31 via a second hinge seat. Its driving medium input end is connected to the driving medium output end of the power source supply device 5, and is used to drive the extension and retraction of the fluid actuator. The first hinge seat is a hinge pin seat 23, and the second hinge seat is a fisheye pin seat 24, which is used to automatically compensate for the centering error during the lifting process. Pins 25 for hinged connection of the cylinder end and actuator rod end of the fluid actuator are respectively inserted into the hinge pin seat 23 and the fisheye pin seat 24. Limiting snap rings 26 are provided at both ends of the pin 25.

[0038] In this embodiment, each working unit is equipped with a fluid actuator (i.e., a hydraulic cylinder 22), therefore the platform has a total of five hydraulic cylinders 22. Their connection to the power supply device 5 is as follows: Figure 12As shown. The power supply device 5 includes a hydraulic station 51, an electrical control cabinet, an oil circuit separator 53, multiple solenoid directional valves 54, multiple stacked pressure reducing valves 56, and multiple one-way throttle valves; each one-way throttle valve includes a stacked hydraulic control one-way valve 551 and a stacked one-way throttle valve 552 connected in sequence; the hydraulic station 51 includes an oil tank 511, an oil suction filter 514, a motor 515, a variable vane pump 52, an air cooler 516, a pipe-type one-way valve 517, and a pressure gauge switch 519; the oil tank 511 is equipped with a level gauge 512 and an oil filler port 513. The output end of the motor 515 is connected to the pump shaft of the variable vane pump 52. The inlet of the variable vane pump 52 is connected to the suction filter 514 located in the oil tank 511, and its outlet is connected to the inlet of the tubular check valve 517. The outlet of the tubular check valve 517 is connected to the pressure gauge switch 519 and the inlet of the oil circuit separator block 53, respectively. The outlet of the pressure gauge switch 519 is connected to the system pressure gauge 518. An air cooler 516 for cooling is provided between the variable vane pump 52 and the oil tank 511.

[0039] The oil circuit separator 53 has multiple outlets, each of which is connected to the inlet of the solenoid directional valve 54 via a stacked pressure reducing valve 56. The stacked pressure reducing valve 56 is equipped with a pressure reducing valve gauge 561. The working port of the solenoid directional valve 54 is connected to port A of the hydraulic cylinder 22 via a stacked hydraulic control check valve 551 and a stacked one-way throttle valve 552 connected in sequence. Port B of the hydraulic cylinder 22 is connected to the return port of the solenoid directional valve 54 via a stacked one-way throttle valve 552 and a stacked hydraulic control check valve 551 connected in sequence. The output terminals of the electrical control cabinet are connected to the control terminals of the motor 515, the air cooler 516, multiple stacked pressure reducing valves 56, multiple solenoid directional valves 54, and multiple stacked hydraulic control check valves 551 and stacked one-way throttle valves 552, thereby driving the hydraulic cylinder 22 to extend and retract.

[0040] In other embodiments, the number of fluid actuators is two, three, or four. The fluid actuator is a double-acting cylinder; the power supply device 5 includes an electrical control cabinet, an air compressor, a pressure reducing valve, a distributor with multiple output terminals, and multiple two-position five-way directional valves; the output terminals of the electrical control cabinet are respectively connected to the control terminals of the air compressor, the pressure reducing valve, and the multiple two-position five-way directional valves; the input terminal of the pressure reducing valve is connected to the output terminal of the air compressor, and its output terminal is connected to the input terminal of the distributor; the multiple output terminals of the distributor are respectively connected to the input terminal of a two-position five-way directional valve; the first and second working terminals of each two-position five-way directional valve are respectively connected to the rodless chamber inlet and the rod chamber inlet of a double-acting cylinder.

[0041] The moving mechanism 4 includes multiple swivel casters 41 disposed at the bottom of the base frame 11 and adjusting components connected to the swivel casters 41; the adjusting components are used to control the swivel casters 41 to descend to contact the ground and move the working unit, or to control the swivel casters 41 to rise so that the ground support column 12 is supported on the ground; in this embodiment, the adjusting components include a connecting plate 42 connected to the swivel casters 41, a support threaded column 43 connected to the connecting plate 42, and a handwheel 44 for driving the support threaded column 43 to rotate; the support threaded column 43 is threadedly connected to the outer bracket 13 or the crossbar bracket 14; rotating the handwheel 44 can drive the connecting plate 42 and the swivel casters 41 to rise and fall by rotating the support threaded column 43 on the outer bracket 13 or the crossbar bracket 14.

[0042] In other embodiments, the adjustment component may also employ automated control or other manual control structures to adjust the lifting and lowering of the swivel caster 41.

[0043] Five working units can be interlocked and locked together by multiple connectors (such as quick clamps 6) provided on their base frame 11 and support plate 31, thereby forming a ring platform with a notch, which is used to surround the mining truck electric wheel assembly to provide a high-altitude assembly work space and a ground operation station; in this embodiment, the connector is a quick clamp 6. When the five working units are combined, they are fixed and locked together by the quick clamp 6 to form a ring platform with a notch.

[0044] In other embodiments, the five working units can also be locked together using structures such as quick-connect plugs or quick-connect clips.

[0045] The method of using this invention includes the following specific steps: Step 1: Move the five working units around the mining truck electric wheel assembly using the universal casters 41 in the moving mechanism 4. After enclosing the five working units, lock and fix them with multiple connectors to form a ring platform with a notch.

[0046] Step 2: Operate the adjustment components to raise the swivel casters 41, so that the ground support column 12 is stably supported on the ground.

[0047] Step 3: Start the power supply device 5 to drive the fluid actuator to extend, thereby raising the operating platform 3 to the predetermined assembly height. When the predetermined assembly height is reached, the lifting column 21 is mechanically locked by the mechanical locking structure on the inner column 212.

[0048] Step 4: Operators can choose to enter the operating platform 3 to perform high-altitude assembly of the mining truck electric wheel assembly, or stand on the ground at the gap to perform low-level operations.

[0049] Step 5: Platform Recycling S5.1 After the assembly of the mining truck electric wheel assembly is completed, the mechanical lock of the lifting column 21 is released, the operating fluid actuator retracts, and the operating platform 3 is lowered to the initial position, releasing the locking state of the connecting parts. S5.2. Operate the adjustment components to lower the swivel casters 41 to contact the ground, and then move the five working units to complete the use of the combined liftable anti-fall platform for electric wheel assembly.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A combined liftable and fall arrest platform for electric wheel assembly, characterized in that: The application relates to a combined liftable anti-falling platform for electric wheel assembly. Each of the working units comprises a supporting mechanism (1), a lifting mechanism (2), an operating platform (3) and a moving mechanism (4). The supporting mechanism (1) comprises a bottom frame (11), and a plurality of ground supporting columns (12) are uniformly arranged on the outer bottom of the bottom frame (11); the operating platform (3) comprises a supporting plate (31) and a fence (32) arranged on the outer edge of the supporting plate (31). The lifting mechanism (2) comprises a plurality of lifting columns (21) and at least one fluid executing unit; each of the lifting columns (21) comprises an outer column (211) and an inner column (212); the lower end of each of the outer columns (211) is fixed to the top of the bottom frame (11) and corresponds to the ground supporting column (12); the upper end of each of the inner columns (212) is fixedly connected with the bottom of the supporting plate (31), and a mechanical locking structure is arranged on the upper end of each of the inner columns (212) and used for locking the height of the lifting column (21). The cylinder end of the fluid executing unit is hinged to the top of the bottom frame (11) through a first hinge seat, the executing rod end is hinged to the bottom of the supporting plate (31) through a second hinge seat, the driving medium input end of the fluid executing unit is connected with the driving medium output end of the power source supply device (5), and the fluid executing unit is used for driving the fluid executing unit to stretch and retract. The moving mechanism (4) comprises a plurality of universal casters (41) arranged on the bottom of the bottom frame (11) and adjusting components connected with the universal casters (41); the adjusting components are used for controlling the universal casters (41) to descend to contact the ground and move the semi-ring-shaped working unit, or controlling the universal casters (41) to ascend to enable the ground supporting columns (12) to be supported on the ground. The five working units can be mutually butted and locked through a plurality of connecting pieces arranged on the bottom frames (11) and the supporting plates (31) of the working units, so that a ring-shaped platform with a gap is formed, and the ring-shaped platform is used for surrounding the mine truck electric wheel assembly to provide a high-altitude assembly operation space and a ground operation station.

2. The combined liftable anti-falling platform for electric wheel assembly according to claim 1, wherein: a fence (32) of at least one of the working units is provided with an openable safety door, and the fence (32) with the safety door is formed; the safety door is provided with an anti-falling bolt; the working unit provided with the safety door is further fixedly provided with a ladder (33), and the ladder is used for enabling an operator to enter the operating platform (3) through the safety door.

3. The combined liftable anti-falling platform for electric wheel assembly according to claim 2, wherein: each of the bottom frames (11) comprises an outer support (13) and a cross rod support (14), and the two ends of the cross rod support (14) are fixedly connected with the inner side of the outer support (13). The bottom of the outer layer support (13) is fixedly connected with the upper end of the plurality of ground support columns (12), and the top thereof is fixedly connected with the lower end of the outer column (211) at a position opposite to the ground support column (12); the top of the outer layer support (13) is connected with the cylinder end of the fluid executing unit through the first hinged seat; The bottom of the crossbar support (14) is fixedly connected with the upper end of at least one ground support column (12), and the top thereof is fixedly connected with the lower end of the outer column (211) at a position opposite to the ground support column (12).

4. The combined liftable anti-falling platform for electric wheel assembly according to claim 3, characterized in that: The adjusting component comprises a connecting plate (42) connected with the universal wheel (41), a supporting threaded column (43) connected with the connecting plate (42), and a hand wheel (44) for driving the supporting threaded column (43) to rotate; the supporting threaded column (43) is threadedly connected with the outer layer support (13) or the crossbar support (14); Rotating the hand wheel (44) can drive the connecting plate (42) and the universal wheel (41) to lift through the rotation of the supporting threaded column (43) on the outer layer support (13) or the crossbar support (14).

5. The combined liftable anti-falling platform for electric wheel assembly according to claim 1, characterized in that: The mechanical locking structure comprises a plurality of limiting holes (213) and limiting pins (214) arranged on the inner column (212) in the height direction; The limiting pin (214) can be inserted into the limiting hole (213) to realize mechanical locking after the fluid executing unit lifts the operation platform (3) to the target height; The connecting piece is a quick clamp (6), and when the five working units are combined, the adjacent working units are fixed and locked with each other through the quick clamp (6) to form a ring-shaped platform with a notch; The first hinged seat is a hinge pin seat (23), and the second hinged seat is a fish eye pin seat (24); The hinge pin seat (23) and the fish eye pin seat (24) are respectively inserted with a pin shaft (25) for hinging the cylinder end and the executing rod end of the fluid executing unit; The pin shaft (25) is provided with a limiting snap spring (26) at both ends thereof.

6. The combination lift and fall arrest platform for electric wheel assembly of claim 1, wherein: Further comprising a plurality of ring-shaped notch adjusting plates (34); The outer edge diameter of the plurality of ring-shaped notch adjusting plates (34) is greater than the inner edge diameter of the ring-shaped platform combined by the five working units; the inner edge diameter of each ring-shaped notch adjusting plate (34) is different and is less than the inner edge diameter of the ring-shaped platform combined by the five working units; When the five working units are combined, the ring-shaped notch adjusting plate (34) can be arranged on the inner side edge of the operation platform (3), and by replacing the ring-shaped notch adjusting plate (34) with different inner edge sizes, the inner edge diameter of the combined operation platform (3) can be reduced to adapt to the electric wheel assembly of different outer diameter specifications.

7. The combined liftable anti-falling platform for electric wheel assembly according to claim 3, characterized in that: The number of ground support columns (12) and lifting columns (21) in each working unit is three; Two ground support columns (12) and lifting columns (21) of the three ground support columns (12) and lifting columns (21) are connected with the outer support (13); the remaining ground support columns (12) and lifting columns (21) of the three ground support columns (12) and lifting columns (21) are connected with the cross rod support (14); The lifting column (21) is provided with an inclined reinforcing rib (15) between the outer support (13) and the cross rod support (14); The number of fluid execution units in each working unit is one.

8. The combined liftable anti-falling platform for electric wheel assembly according to any one of claims 1-7, characterized in that: The fluid execution unit is a hydraulic cylinder (22); The power source supply device (5) comprises a hydraulic station (51), an electric control cabinet, an oil path separation block (53) provided with multiple output ends, multiple electromagnetic reversing valves (54), multiple superimposed pressure reducing valves (56) and multiple one-way throttle valves; each one-way throttle valve comprises a superimposed hydraulic control check valve (551) and a superimposed one-way throttle valve (552) connected in sequence; The hydraulic station (51) comprises an oil tank (511), an oil suction filter (514), an electric motor (515), a variable vane pump (52), a tubular check valve (517) and a pressure gauge switch (519); The oil tank (511) is provided with a liquid level meter (512) and a filling port (513); The output end of the electric motor (515) is connected with the pump shaft of the variable vane pump (52), the inlet of the variable vane pump (52) is connected with the oil suction filter (514) in the oil tank (511), the outlet of the variable vane pump (52) is connected with the inlet of the tubular check valve (517), the outlet of the tubular check valve (517) is respectively connected with the pressure gauge switch (519) and the inlet of the oil path separation block (53); the outlet of the pressure gauge switch (519) is connected with a system pressure gauge (518); The variable vane pump (52) and the oil tank (511) are provided with a forced air cooler (516) for cooling; The oil path separation block (53) is provided with multiple outlets, each outlet is connected with the inlet of the electromagnetic reversing valve (54) through the superimposed pressure reducing valve (56), the superimposed pressure reducing valve (56) is provided with a pressure reducing valve pressure gauge (561); the working port of the electromagnetic reversing valve (54) is connected with the A port of the hydraulic cylinder (22) through the superimposed hydraulic control check valve (551) and the superimposed one-way throttle valve (552) connected in sequence, the B port of the hydraulic cylinder (22) is connected with the backflow port of the electromagnetic reversing valve (54) through the superimposed one-way throttle valve (552) and the superimposed hydraulic control check valve (551) connected in sequence; The output end of the electric control cabinet is respectively connected with the electric motor (515), the forced air cooler (516), multiple superimposed pressure reducing valves (56), multiple electromagnetic reversing valves (54) and the control ends of multiple superimposed hydraulic control check valves (551) and superimposed one-way throttle valves (552), so as to drive the hydraulic cylinder (22) to stretch and retract.

9. The combined liftable anti-falling platform for electric wheel assembly of any one of claims 1-7, characterized in that: the fluid execution unit is a double-acting cylinder; the power source supply device (5) comprises an electric control cabinet, an air compressor, a pressure reducing valve, a gas distributor provided with multiple output ends, and multiple two-position five-way directional control valves; the output end of the electric control cabinet is connected with the control end of the air compressor, the pressure reducing valve, and the multiple two-position five-way directional control valves respectively; the input end of the pressure reducing valve is connected with the output end of the air compressor, and the output end of the pressure reducing valve is connected with the input end of the gas distributor; the multiple output ends of the gas distributor are connected with the input ends of the multiple two-position five-way directional control valves respectively; the first working end and the second working end of each two-position five-way directional control valve are connected with the rodless cavity air inlet and the rod cavity air inlet of one double-acting cylinder respectively.

10. A method of using a combined liftable and fall arrest platform for an electric wheel assembly, the method comprising: The method comprises the following steps: Step 1, assembling the combined liftable anti-falling platform for electric wheel assembly of any one of claims 1-9; Step 2, moving the five working units around the electric wheel assembly of the mine truck by the universal casters (41) in the moving mechanism (4), and then locking and fixing the five working units by multiple connecting pieces to form a ring-shaped platform with a gap; Step 3, operating the adjusting component to make the universal casters (41) rise, so that the ground supporting columns (12) are stably supported on the ground; Step 4, starting the power source supply device (5) to drive the fluid execution unit to extend, thereby lifting the operation platform (3) to a predetermined assembly height, and when reaching the predetermined assembly height, mechanically locking the lifting column (21) by the mechanical locking structure on the inner column (212); Step 5, the operator can choose to enter the operation platform (3) to perform high-altitude assembly work of the electric wheel assembly of the mine truck, or stand on the ground at the gap to perform low-position operation; Step 6, platform recycling S6.1, after the assembly work of the electric wheel assembly of the mine truck is completed, the mechanical locking of the lifting column (21) is cancelled, the fluid execution unit is contracted to make the operation platform (3) descend to the initial position, and the locking state of the connecting pieces is released; S6.2, operating the adjusting component to make the universal casters (41) contact the ground, and then moving the five working units to complete the use of the combined liftable anti-falling platform for electric wheel assembly.

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