A lifting platform device and aerial work equipment

Abstract

This application provides a lifting platform device and an aerial work platform. The lifting platform device includes a vehicle body module, a scissor lift module, and a guardrail assembly. The vehicle body module includes a vehicle body and multiple wheels, which are rotatably connected to the same vehicle body. A load-bearing part is provided on the upper surface of the vehicle body. The scissor lift module is connected to the load-bearing part of the vehicle body. The work platform is connected to the scissor lift module, and the height of the work platform is adjusted as the multiple cross arms are extended or retracted. The guardrail assembly is detachably connected to the work platform. The lifting of the work platform is achieved through the scissor lift module, avoiding the need to dismantle and rebuild scaffolding. The horizontal layout of the work platform makes full use of space and is convenient for use in narrow spaces. At the same time, the movement is achieved through multiple wheels, reducing working time and manpower. Meanwhile, the guardrail assembly protects the operators, improving the safety and efficiency of the lifting platform device.

Description

Technical Field

[0001] This utility model relates to the technical field of aerial work equipment, and in particular to a lifting platform device and aerial work equipment. Background Technology

[0002] With the development of technology, high-altitude operations such as the maintenance of conductive arms of disconnect switches, replacement of clamps, and handling of vertical tie rods are now common. Currently, traditional manual scaffolding is used for these operations. However, changing work sites requires dismantling and rebuilding the scaffolding multiple times, consuming significant time and manpower. Furthermore, scaffolding is prone to instability, increasing the risk of falls. Utility Model Content

[0003] The purpose of this utility model is to provide a lifting platform device and an aerial work platform. The vehicle module includes a vehicle body and multiple wheels, which are distributed at different positions on the vehicle body and are rotatably connected to the same vehicle body, and can move relative to the ground. The upper surface of the vehicle body is provided with a load-bearing part. The scissor lift module is connected to the load-bearing part of the vehicle body and is located on the upper side of the load-bearing part. The scissor lift module includes multiple cross arms, a hydraulic power component, and a working platform. The multiple cross arms are hinged to each other, and one cross arm is connected to the output end of the hydraulic power component. The connecting end of the hydraulic power component is swayably connected to the load-bearing part. The multiple cross arms are extended or retracted under the drive of the hydraulic power component. The working platform is connected to the scissor lift module and is located on the upper side of the scissor lift module. The working platform and the multiple cross arms are stacked in the vertical direction. The work platform is connected to at least two cross arms, and its height is adjusted as the cross arms extend or retract. The work platform is arranged horizontally. A guardrail assembly is detachably connected to the work platform, comprising a base and multiple guardrails connected to the base. The base is supported by the work platform. Multiple guardrails are located on different sides of the base, enclosing the work platform to form a receiving space for operators. The work platform is raised and lowered using a scissor lift module, avoiding the need to dismantle and rebuild scaffolding. The horizontal arrangement of the work platform makes full use of space, facilitating use in confined spaces. Multiple wheels enable movement, reducing working time and manpower. The guardrail assembly protects operators, improving the safety and efficiency of the lifting platform device.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a lifting platform device, applied to aerial work equipment, the lifting platform device comprising: The vehicle body module includes a vehicle body and multiple wheels, the multiple wheels being distributed at different positions on the vehicle body, the multiple wheels being rotatably connected to the same vehicle body, and being movable relative to the ground; the upper surface of the vehicle body is provided with a load-bearing portion; A scissor lift module is connected to the load-bearing part of the vehicle body and is located on the upper side of the load-bearing part; the scissor lift module includes multiple cross arms, a hydraulic power component, and a working platform. The multiple cross arms are hinged to each other, one cross arm is connected to the output end of the hydraulic power component, and the connecting end of the hydraulic power component is swayably connected to the load-bearing part; the multiple cross arms are deployed or retracted under the drive of the hydraulic power component. A working platform is connected to the scissor lift module and is located on the upper side of the scissor lift module; the working platform and multiple cross arms are stacked in the vertical direction; the working platform is connected to at least two of the cross arms, and the height of the working platform is adjusted as the multiple cross arms are extended or retracted; the working platform is arranged in a horizontal direction. A guardrail assembly is detachably connected to the work platform. The guardrail assembly includes a base and multiple guardrails connected to the base. The base is supported by the work platform. The multiple guardrails are disposed on different sides of the base and enclose the work platform to form an accommodating space for accommodating operators.

[0005] Optionally, when the multiple cross arms are in the retracted state, two adjacent cross arms are arranged in an inclined direction; two adjacent cross arms are close to each other; A first connecting arm is provided between two adjacent cross arms. One end of the first connecting arm is swayably connected to the middle position of one of the cross arms, and the other end of the first connecting arm is swayably connected to the lower end position of the other cross arm.

[0006] Optionally, two adjacent cross arms open or close in the vertical direction as the output end of the hydraulic power component extends or retracts; Each of the cross arms is a hollow frame; the hydraulic power unit is located on the upper side of the load-bearing part and its angle is adjusted as the output end of the hydraulic power unit extends and retracts.

[0007] Optionally, the working platform has a flat plate structure; One of the cross arms near the work platform serves as a support arm, the upper end of which is hinged to one end of the work platform; A second connecting arm is provided between the support arm and the working platform. One end of the second connecting arm is swayably connected to the middle position of the support arm, and the other end of the second connecting arm is hinged to one end of the working platform.

[0008] Optionally, the base is located above the support portion and is supported by the support portion; Multiple weighing sensors are connected to the bottom of the base facing the support portion, and the multiple weighing sensors are distributed at different positions in the base facing the bottom of the support portion; the multiple weighing sensors are located between the base and the support portion.

[0009] Optionally, the base includes a load-bearing frame and a load-bearing plate; the load-bearing plate is laid on the upper surface of the load-bearing frame and is used to support the operator; The force-bearing frame has a trapezoidal structure and supports different positions of the force-bearing plate; the corresponding weighing sensors are connected to multiple corners of the force-bearing frame.

[0010] Optionally, the guardrail is connected to the base, and multiple guardrails are arranged in a square; one guardrail is swayably connected to another guardrail or the base, so that the guardrail is in a side-opening door state, and the operator in the receiving space can leave the receiving space when opening the guardrail.

[0011] Optionally, the lifting platform device further includes a control module, which is connected to one of the guardrails and located near the top of the guardrail. The control module has a housing, which is fixedly connected to the guardrail and located within the containment space.

[0012] Optionally, the control module also includes a main control board, which is built into the housing. The main control board integrates a clock and reset circuit, an external crystal oscillator circuit, a reset circuit, a power decoupling circuit, an SWD debugging interface circuit, an indicator light circuit, a power conversion and voltage regulation circuit, a communication and control execution circuit, a key input circuit, and a 4G communication module interface circuit.

[0013] To achieve the above objectives, this utility model provides the following technical solution: an aerial work platform, including the aforementioned lifting platform device.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides a lifting platform device and an aerial work platform. The vehicle module includes a vehicle body and multiple wheels, which are distributed at different positions on the vehicle body and are rotatably connected to the same vehicle body, allowing them to move relative to the ground. A load-bearing section is provided on the upper surface of the vehicle body. A scissor lift module is connected to the load-bearing section of the vehicle body and is located above it. The scissor lift module includes multiple cross arms, a hydraulic power component, and a work platform. The multiple cross arms are hinged together, and one cross arm is connected to the output end of the hydraulic power component. The connection end of the hydraulic power component is swayably connected to the load-bearing section. The multiple cross arms are extended or retracted under the drive of the hydraulic power component. The work platform is connected to the scissor lift module and is located above it. The work platform and the multiple cross arms are stacked vertically. The platform is connected to at least two cross arms, and its height is adjusted as the cross arms extend or retract. The platform is horizontally oriented. A guardrail assembly is detachably connected to the platform, comprising a base and multiple guardrails connected to the base. The base is supported by the platform. Multiple guardrails are positioned on different sides of the base, enclosing the platform to form a storage space for operators. The platform is raised and lowered using a scissor lift module, avoiding the need to dismantle and rebuild scaffolding. The horizontal orientation of the platform maximizes space utilization, facilitating use in confined spaces. Multiple wheels enable movement, reducing working time and manpower. The guardrail assembly protects operators, improving the safety and efficiency of the lifting platform device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0016] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0017] Figure 1 A schematic diagram of a lifting platform device according to an embodiment of this application is shown.

[0018] Figure 2 A partial schematic diagram of a lifting platform device according to an embodiment of this application is shown.

[0019] Figure 3 A schematic diagram showing the connection between the base of a lifting platform device and a weighing sensor according to an embodiment of this application is shown.

[0020] Figure 4 A schematic diagram of the load-bearing frame of a lifting platform device according to an embodiment of this application is shown.

[0021] Figure 5 A schematic diagram of the control module of a lifting platform device according to an embodiment of this application is shown.

[0022] Figure 6 A circuit diagram of the main control board of a lifting platform device according to an embodiment of this application is shown.

[0023] Figure 7 A circuit diagram of the external crystal oscillator circuit of a lifting platform device according to an embodiment of this application is shown.

[0024] Figure 8 A circuit diagram of the reset circuit of a lifting platform device according to an embodiment of this application is shown.

[0025] Figure 9 A circuit diagram of the power decoupling circuit of a lifting platform device according to an embodiment of this application is shown.

[0026] Figure 10 A circuit diagram of the SWD debugging interface circuit of a lifting platform device according to an embodiment of this application is shown.

[0027] Figure 11 A circuit diagram of the indicator light circuit of a lifting platform device according to an embodiment of this application is shown.

[0028] Figure 12 A circuit diagram of the power conversion and voltage regulation circuit of a lifting platform device according to an embodiment of this application is shown.

[0029] Figure 13 A circuit diagram of the communication and control execution circuit of a lifting platform device according to an embodiment of this application is shown.

[0030] Figure 14 A circuit diagram of the key input circuit and the 4G communication module interface circuit of a lifting platform device according to an embodiment of this application is shown.

[0031] Figure Labels 100. Lifting platform device; 10. Vehicle body module; 11. Vehicle body; 111. Load-bearing component; 12. Wheels; 20. Scissor lift module; 21. Cross boom; 22. Hydraulic power components; 23. Working platform; 30. Guardrail assembly; 30a. Accommodation space; 31. Base; 311. Load-bearing frame; 312. Load-bearing plate; 32. Guardrail; 33. Weighing sensor; 40. Control module; 41. Box body. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0033] Please refer to the attached document. Figures 1-14 This application provides a lifting platform device 100, which is applied to aerial work equipment and is used to automatically lift the work platform 23.

[0034] Please refer to the attached document. Figures 1-5In this embodiment, the lifting platform device 100 includes a vehicle body module 10, a scissor lift module 20, and a guardrail assembly 30. The vehicle body module 10 includes a vehicle body 11 and multiple wheels 12. The multiple wheels 12 are distributed at different positions on the vehicle body 11 and are rotatably connected to the same vehicle body 11, and can move relative to the ground. The upper surface of the vehicle body 11 is provided with a support portion 111. The scissor lift module 20 is connected to the support portion 111 of the vehicle body 11 and is located on the upper side of the support portion 111. The scissor lift module 20 includes multiple cross arms 21, a hydraulic power component 22, and a working platform 23. The multiple cross arms 21 are hinged to each other, and one cross arm 21 is connected to the output end of the hydraulic power component 22. The connecting end of the hydraulic power component 22 is swayably connected to the load-bearing part 111. The multiple cross arms 21 are extended or retracted under the drive of the hydraulic power component 22. The working platform 23 is connected to the scissor lift module 20 and is located on the upper side of the scissor lift module 20. The working platform 23 and the multiple cross arms The work platform 21 is stacked vertically; the work platform 23 is connected to at least two cross arms 21, and the height of the work platform 23 is adjusted as the multiple cross arms 21 are extended or retracted. The work platform 23 is arranged horizontally; the guardrail assembly 30 is detachably connected to the work platform 23, and the guardrail assembly 30 includes a base 31 and multiple guardrails 32, which are connected to the base 31; the base 31 is supported by the work platform 23; the multiple guardrails 32 are set on different sides of the base 31 and enclose the work platform 23 to form an accommodating space 30a, which is used to accommodate operators. The lifting of the work platform 23 is achieved by the scissor lift module 20, avoiding the need to dismantle and rebuild scaffolding. The horizontal arrangement of the work platform 23 makes full use of space and is convenient for use in narrow spaces. At the same time, it is moved by multiple wheels 12, reducing working time and manpower. Meanwhile, the guardrail assembly 30 protects the operators, improving the safety and efficiency of the lifting platform device 100.

[0035] Please refer to the attached document. Figures 1-2 In this embodiment, the vehicle body module 10 includes a vehicle body 11 and multiple wheels 12. The multiple wheels 12 are disposed on the lower side of the vehicle body 11 and distributed at different positions on the vehicle body 11. The multiple wheels 12 are rotatably connected to the same vehicle body 11 and can move relative to the ground, so that the vehicle body 11 can move relative to the ground via the multiple wheels 12, avoiding the need for the vehicle body module 10 to be transferred by transport. Specifically, there are four wheels 12, which are respectively arranged relative to the four corners of the vehicle body 11, ensuring the stability of the movement of the vehicle body module 10. A load-bearing portion 111 is provided on the upper surface of the vehicle body 11.

[0036] The scissor lift module 20 is connected to the support portion 111 of the vehicle body 11 and is located on the upper side of the support portion 111, so that the scissor lift module 20 can be fixed on the upper side of the support portion 111. The scissor lift module 20 includes multiple cross arms 21, a hydraulic power component 22, and a working platform 23. The multiple cross arms 21 are hinged to each other. One cross arm 21 is connected to the output end of the hydraulic power component 22. The connecting end of the hydraulic power component 22 is swayably connected to the support portion 111, so as to adjust the position of the hydraulic power component 22 relative to the support portion 111, thereby facilitating the positional deviation adjustment of the hydraulic power component 22 relative to one cross arm 21. The multiple cross arms 21 are extended or retracted under the drive of the hydraulic power component 22, so as to realize the raising or lowering of the multiple cross arms 21.

[0037] The work platform 23 is connected to the scissor lift module 20 and is located on the upper side of the scissor lift module 20; the work platform 23 and multiple cross arms 21 are stacked in the vertical direction; the work platform 23 is connected to at least two cross arms 21, and the height of the work platform 23 is adjusted as the multiple cross arms 21 are extended or retracted, and the work platform 23 is arranged in a horizontal direction; the lifting and lowering of the work platform 23 is achieved through the scissor lift module 20, avoiding the need to dismantle and rebuild scaffolding, and the horizontal arrangement of the work platform 23 makes full use of space and is convenient for use in narrow spaces. At the same time, it is moved by multiple wheels 12, reducing working time and manpower.

[0038] The guardrail assembly 30 is detachably connected to the work platform 23, allowing it to be easily attached to or detached from the platform 23, thus improving the ease of installation and removal. The guardrail assembly 30 includes a base 31 and multiple guardrails 32 connected to the base 31. The base 31 is supported by the work platform 23. The multiple guardrails 32 are located on different sides of the base 31 and, together with the work platform 23, form a receiving space 30a. This receiving space 30a is used to accommodate operators, ensuring sufficient standing space for them. The guardrail assembly 30 protects the operators, improving the safety and efficiency of the lifting platform device 100.

[0039] Please refer to the attached document. Figures 1-2 In this embodiment of the application, when the multiple cross arms 21 are in the retracted state, the two adjacent cross arms 21 are arranged in an inclined direction; the two adjacent cross arms 21 are close to each other; thus reducing the space occupied by the scissor lift module 20.

[0040] A first connecting arm is provided between two adjacent cross arms 21. One end of the first connecting arm is swayably connected to the middle position of one cross arm 21, and the other end of the first connecting arm is swayably connected to the lower end position of the other cross arm 21, which improves the strength between the two adjacent cross arms 21 and increases the support force of the scissor lift module 20.

[0041] Please refer to the attached document. Figures 1-2 In this embodiment, two adjacent cross arms 21 open or close vertically as the output end of the hydraulic power unit 22 extends or retracts, facilitating the automated raising and lowering of the scissor lift module 20 by the hydraulic power unit 22. Each cross arm 21 is a hollow frame; the hydraulic power unit 22 is located on the upper side of the bearing portion 111 and its angle is adjusted as the output end of the hydraulic power unit 22 extends or retracts, allowing for positional adjustment of the hydraulic power unit 22 relative to a cross arm 21, thus avoiding a rigid connection between the hydraulic power unit 22 and a cross arm 21. Optionally, the hydraulic power unit 22 is a hydraulic pump or a hydraulic cylinder.

[0042] Please refer to the attached document. Figures 1-2 In this embodiment, the work platform 23 has a flat plate structure, ensuring the stability of the operator's work. A cross arm 21 near the work platform 23 serves as a support arm, the upper end of which is hinged to one end of the work platform 23. A second connecting arm is provided between the support arm and the work platform 23. One end of the second connecting arm is swayably connected to the middle position of the support arm, and the other end of the second connecting arm is hinged to one end of the work platform 23, so that the work platform 23 can be hinged to the support arm through the second connecting arm, thereby facilitating the support arm to drive the work platform 23 to rise and fall.

[0043] Please refer to the attached document. Figures 1-2 In this embodiment, the base 31 is located on the upper side of the support portion 111 and is supported by the support portion 111, so that the base 31 can be fixed to the upper side of the support portion 111. Multiple weighing sensors 33 are connected to the bottom of the base 31 facing the support portion 111. These multiple weighing sensors 33 are distributed at different positions on the bottom of the base 31 facing the support portion 111. The multiple weighing sensors 33 are located between the base 31 and the support portion 111, so that they can detect the weight of the operator on the base 31, realizing real-time monitoring and control of the force state of the base 31 during high-altitude operations, effectively avoiding safety accidents caused by force problems, and improving the safety of high-altitude operations. Specifically, there are four weighing sensors 33, which are arranged relative to the four corners of the base 31, respectively, to monitor the force state of the base 31 from all directions, preventing the base 31 from tipping over due to excessive force on one side, stabilizing the base 31, and ensuring the accuracy and reliability of force monitoring during high-altitude operations.

[0044] Please refer to the attached document. Figures 1-4 In this embodiment, the base 31 includes a force-bearing frame 311 and a force-bearing plate 312. The force-bearing plate 312 is laid on the upper surface of the force-bearing frame 311, which improves the support strength of the force-bearing plate 312. The force-bearing plate 312 is used to support the operator. The force-bearing frame 311 has a trapezoidal structure and supports different positions of the force-bearing plate 312. Corresponding weighing sensors 33 are connected to multiple corners of the force-bearing frame 311 so that the weighing sensors 33 can detect the weight of the operator on the force-bearing plate 312. This allows the operator to monitor the force state of the force-bearing frame 311 at any time, effectively avoiding failure caused by insufficient support of the lowering platform device due to the force exceeding the specified value.

[0045] The load-bearing plate 312 is the main load-bearing component 111 during operator work. The load-bearing plate 312 has high load-bearing capacity and wear resistance. It can stably support the operator, providing a safe, reliable and stable load-bearing surface for the operator's high-altitude work, ensuring that the load-bearing plate 312 always maintains a good load-bearing state when the operator performs various operations on the lifting platform device 100, thus laying a solid foundation for work safety.

[0046] Please refer to the attached document. Figures 1-2 In this embodiment, the guardrail 32 is connected to the base 31, and multiple guardrails 32 are arranged in a square shape so that the outline of the guardrail 32 matches the outline of the base 31. One guardrail 32 is swayably connected to another guardrail 32 or the base 31, so that the guardrail 32 is in a side-opening door state. When the operator in the receiving space 30a opens the guardrail 32, he / she can leave the receiving space 30a, so that the operator can enter and exit the receiving space 30a by swinging the guardrail 32. Optionally, one guardrail 32 can be swayed relative to another guardrail 32 or the base 31 by means of a hinge.

[0047] Please refer to the attached document. Figures 1-5 In this embodiment, the lifting platform device 100 further includes a control module 40, which is connected to a guardrail 32 and located near the top of the guardrail 32; this facilitates operation of the control module 40 by the operator. The control module 40 has a housing 41, which is fixedly connected to the guardrail 32 and located within the receiving space 30a, so that the control module 40 can be connected to the guardrail 32 through the housing 41.

[0048] In this embodiment, the control module 40 further includes a main control board, which is built into the housing 41. The main control board integrates a clock and reset circuit, an external crystal oscillator circuit, a reset circuit, a power decoupling circuit, an SWD debugging interface circuit, an indicator light circuit, a power conversion and voltage regulation circuit, a communication and control execution circuit, a key input circuit, and a 4G communication module interface circuit. As the core control unit, the main control board and the housing 41 provide good protection for the internal components, protecting them from interference and damage from external environmental factors.

[0049] Please refer to the attached document. Figures 6-14 The main control board is the core control part of the weighing device (MCU minimum system circuit), using an STM32F103C8T6 microcontroller as the main control unit, responsible for data acquisition, processing, communication management, and control execution. Its main functions and components are as follows: 1. Main Control Unit: The central device is an STM32F103C8T6, featuring a 72MHz main frequency, rich peripheral interfaces, and low power consumption. As the "brain" of the entire weighing system, it performs real-time processing of the weight signals collected by the sensors and executes communication and alarm control based on the results.

[0050] 2. Clock and Reset Circuit: A stable system clock is provided to the MCU via an external 8MHz crystal oscillator (OS_8M_IN / OS_8M_OUT). The NRST pin is connected to the reset circuit to ensure reliable reset in case of system power-on or abnormality.

[0051] The BOOT0 pin is grounded via a 10kΩ pull-up resistor to ensure that the MCU boots from Flash by default.

[0052] Communication interfaces UART1_TX / UART1_RX: Connect to the 4G module to enable remote data upload and communication between the backend / mobile app. U2_TX / U2_RX: Serves as an extended serial port, allowing connection to an RS485 communication module or other peripherals. RE1: Related to RS485 transmit / receive enable control, enabling switch between transmit and receive modes.

[0053] 3. Debugging and Download Interface: SWDIO and SWCLK: These constitute the SWD debugging interface, used for program downloading, online debugging, and system maintenance.

[0054] 4. Human-computer interaction and status indication: KEY: Key input, used for system reset, zeroing or calibration operations.

[0055] LED1: Status indicator light, displaying system operating status, communication status, or alarm information. ZSD, OPEN: Extended output control ports, which can drive relays, buzzers, or alarm lights to achieve overload protection or safety warnings.

[0056] 5. Power Supply and Grounding: The system is powered by a 3.3V DC power supply, with each VDD / VSS pin having independent connection to ensure stable MCU operation. Multiple decoupling capacitors are configured in the circuit to suppress power supply noise and improve anti-interference capability.

[0057] For the external crystal oscillator circuit, the external crystal oscillator circuit provides a stable clock source for the MCU through an 8MHz external crystal oscillator and two load capacitors; after power-on, the MCU will run with the external crystal oscillator as the reference, thereby ensuring the accuracy of the internal system clock and peripherals (such as UART, timers, ADC); Regarding the reset circuit, when the reset button SW1 is pressed, the RST pin potential is pulled low momentarily, and the MCU is reset; after the button is released, the RST pin returns to a high level, and the MCU will restart the program from the initial address; the pull-up resistor ensures that the RST pin always remains at a high level when not in operation; the capacitor provides electrical stability and avoids false resets caused by interference or glitches.

[0058] The power decoupling circuit is an indispensable core component of the STM32 minimum system, consisting of a crystal oscillator circuit, a reset circuit, and a power decoupling circuit. The crystal oscillator circuit uses an 8MHz external crystal oscillator with two 22pF load capacitors, providing a stable and reliable system clock to the microcontroller via the OSC_IN and OSC_OUT pins, ensuring the accuracy and consistency of program execution and peripheral communication. The reset circuit consists of pull-up resistors, a reset button, and a 100nF capacitor. The resistors ensure the RST pin remains high during normal operation, the capacitors filter interference and provide power-on delay, and the reset button allows for manual reset in case of system malfunctions, thus ensuring stable startup and reliable operation of the microcontroller. The power decoupling section uses multiple 100nF capacitors connected in parallel between the 3.3V power supply and ground, effectively absorbing power supply noise and transient inrush currents, suppressing high-frequency interference, and improving power supply purity and system anti-interference capability. These three circuits work together to provide the STM32F103 with a stable clock, a reliable reset mechanism, and a clean power supply environment, ensuring that the weighing device can maintain high reliability and stability even in complex electromagnetic environments. This is the fundamental guarantee for the entire control circuit.

[0059] The SWD debug interface circuit connects to an external debugger via a five-pin header H1. It includes a 3.3V power supply, ground, a reset pin RST, and debug signals SWDIO and SWCLK. SWDIO is used for data transmission, SWCLK provides the clock signal, and the RST pin can be used to reset the microcontroller during debugging and downloading. 3.3V and GND serve as power supply and reference ground, ensuring signal level consistency and stability. The entire interface conforms to the STM32 SWD standard debug protocol and can be connected to programmers such as ST-LINK for firmware burning, online debugging, and program updates. This circuit provides a reliable means of development and maintenance for the control core of the weighing device, making system development, testing, and later upgrades more convenient and efficient, while also ensuring rapid recovery and debugging in case of equipment malfunctions.

[0060] The indicator light circuit includes two sets of LED indicator units, LED1 and LED2. Each LED is equipped with current-limiting resistors R27 and R28 (both with a resistance of 2kΩ) to limit the current flowing through the diode and prevent damage to the device due to overcurrent. LED1 is connected through an external control signal port. When the control pin outputs a low level, current flows through LED1 and R27, illuminating LED1. This is commonly used to display system operating status or communication status. LED2 is directly driven by a 3.3V power supply and, together with R28, forms a power indicator circuit. It illuminates when the circuit is powered on, indicating whether the power supply is normal. This indicator light circuit design is simple, has low power consumption, and provides an intuitive display of the system's operating and power supply status, facilitating debugging and troubleshooting. It also improves the visibility and maintainability of the system in the field.

[0061] For the power conversion and voltage regulation circuit, the entire power supply circuit consists of a two-stage voltage regulation module. First, the circuit input is a 12V DC voltage, which is regulated to 5V by the U2 module to power some components in the system (such as sensors or communication modules). Then, the U20 chip (CJA1117B-3.3 low-dropout regulator) further regulates the 5V voltage to 3.3V for the STM32 main control chip and its related peripherals. To ensure voltage output stability and anti-interference capability, filter capacitors are connected in parallel at both the input and output terminals of the regulator. A 10nF capacitor is used to filter out high-frequency spike interference, and a 100nF capacitor is used to suppress power supply ripple and improve voltage regulation. The overall power module design concept is staged voltage regulation: 12V → 5V → 3.3V. This not only meets the voltage requirements of different circuit units but also improves the stability and purity of the power supply through multi-stage filter capacitors, ensuring reliable operation of the control system in complex environments.

[0062] For the communication and control execution circuit, the left side of the circuit is the RS485 communication interface, using the MAX485ESA+T chip to convert the STM32's UART serial port signal into an RS485 differential signal. U2_TX and U2_RX are connected to the chip's DI and RO pins respectively. RE1 and DE control the transmit / receive state switching. A / B serves as the differential bus signal for communication with external devices. R29 is a 120Ω terminating resistor to prevent signal reflection, and C17 is a decoupling capacitor to improve communication stability. Through this part of the circuit, the weighing device can achieve reliable long-distance data transmission with a host computer or other nodes.

[0063] The right side of the circuit is the switch control circuit, mainly composed of two NPN transistors (2SC2873) Q11 and Q12 and external resistors. The OPEN signal controls the load's on / off state through Q12, and R54 acts as a current-limiting resistor to ensure drive safety. The ZSD signal controls the switching of the 12V load through Q11, and R50 and R51 form a bias and pull-down circuit to ensure stability when no signal is input. This part of the circuit can be used to drive external actuators such as relays, buzzers, and alarm lights to achieve overload alarm or safety warning functions.

[0064] The upper part of the button input circuit and 4G communication module interface circuit consists of a key button, a pull-up resistor R53 (1kΩ), and a decoupling capacitor C42 (100nF). The button is normally at a high level; when pressed, the level is pulled low, and the MCU detects this level change to activate the button function. The capacitor acts as a debouncing and filtering mechanism to prevent false triggering caused by mechanical vibration. This circuit is commonly used for basic operations such as function switching, zeroing, and calibration of weighing devices.

[0065] The lower half is the 4G communication module circuit (U21). The module connects to the MCU serial port via UART1_TX / UART1_RX to achieve bidirectional data transmission; 4G_RST and 4G_DTR are used for remote control reset and data terminal functions, respectively; the module is powered by a +5V power supply, with internal voltage regulation to power the logic circuit. This module also reserves interfaces for GPS, USB (DP / DM / VBUS), etc., to support positioning and extended communication needs. Through the 4G network, the weighing device can upload weight data and operating status to the backend server or mobile APP in real time, thereby realizing remote monitoring and alarm linkage.

[0066] In this embodiment of the application, an aerial work platform includes a lifting platform device 100, which is part of the aerial work platform and is used to carry operators to perform aerial work.

[0067] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides a lifting platform device 100 and an aerial work platform. The vehicle module 10 includes a vehicle body 11 and multiple wheels 12, which are distributed at different positions on the vehicle body 11. The multiple wheels 12 are rotatably connected to the same vehicle body 11 and can move relative to the ground. A load-bearing part 111 is provided on the upper surface of the vehicle body 11. A scissor lift module 20 is connected to the load-bearing part 111 of the vehicle body 11 and is located on the upper side of the load-bearing part 111. The scissor lift module 20 includes multiple cross arms 21, a hydraulic power component 22, and a working platform 23. The multiple cross arms 21 are hinged to each other, and one cross arm 21 is connected to the output end of the hydraulic power component 22. The connecting end of the hydraulic power component 22 is swayably connected to the load-bearing part 111. The multiple cross arms 21 are extended or retracted under the drive of the hydraulic power component 22. The working platform 23 is connected to the scissor lift module 20 and is located on the upper side of the scissor lift module 20. The working platform 23 and the multiple cross arms 21 are stacked along the vertical direction. The work platform 23 is connected to at least two cross arms 21. The height of the work platform 23 is adjusted as the cross arms 21 are extended or retracted. The work platform 23 is arranged horizontally. The guardrail assembly 30 is detachably connected to the work platform 23. The guardrail assembly 30 includes a base 31 and multiple guardrails 32, which are connected to the base 31. The base 31 is supported by the work platform 23. The multiple guardrails 32 are set on different sides of the base 31 and enclose the work platform 23 to form an accommodating space 30a. This accommodating space 30a is used to accommodate operators. The lifting of the work platform 23 is achieved by the scissor lift module 20, avoiding the need to dismantle and rebuild scaffolding. The horizontal arrangement of the work platform 23 makes full use of space and is convenient for use in narrow spaces. At the same time, it is moved by multiple wheels 12, reducing working time and manpower. Meanwhile, the guardrail assembly 30 protects the operators, improving the safety and efficiency of the lifting platform device 100.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0069] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0070] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An elevating platform apparatus, characterized by, The lifting platform device, used in aerial work equipment, includes: The vehicle body module includes a vehicle body and multiple wheels, the multiple wheels being distributed at different positions on the vehicle body, the multiple wheels being rotatably connected to the same vehicle body, and being movable relative to the ground; the upper surface of the vehicle body is provided with a load-bearing portion; A scissor lift module is connected to the load-bearing part of the vehicle body and is located on the upper side of the load-bearing part; the scissor lift module includes multiple cross arms, a hydraulic power component, and a working platform. The multiple cross arms are hinged to each other, one cross arm is connected to the output end of the hydraulic power component, and the connecting end of the hydraulic power component is swayably connected to the load-bearing part; the multiple cross arms are deployed or retracted under the drive of the hydraulic power component. A working platform is connected to the scissor lift module and is located on the upper side of the scissor lift module; the working platform and multiple cross arms are stacked in the vertical direction; the working platform is connected to at least two of the cross arms, and the height of the working platform is adjusted as the multiple cross arms are extended or retracted; the working platform is arranged in a horizontal direction. A guardrail assembly is detachably connected to the work platform. The guardrail assembly includes a base and multiple guardrails connected to the base. The base is supported by the work platform. The multiple guardrails are disposed on different sides of the base and enclose the work platform to form an accommodating space for accommodating operators.

2. The overhead platform assembly of claim 1, wherein, When the multiple cross arms are in the retracted state, the two adjacent cross arms are arranged in an inclined direction; the two adjacent cross arms are close to each other; A first connecting arm is provided between two adjacent cross arms. One end of the first connecting arm is swayably connected to the middle position of one of the cross arms, and the other end of the first connecting arm is swayably connected to the lower end position of the other cross arm.

3. The overhead platform assembly of claim 2, wherein, The two adjacent cross arms open or close in the vertical direction as the output end of the hydraulic power component extends or retracts; Each of the cross arms is a hollow frame; the hydraulic power unit is located on the upper side of the load-bearing part and its angle is adjusted as the output end of the hydraulic power unit extends and retracts.

4. The overhead platform assembly of claim 2, wherein, The working platform has a flat plate structure; One of the cross arms near the work platform serves as a support arm, the upper end of which is hinged to one end of the work platform; A second connecting arm is provided between the support arm and the working platform. One end of the second connecting arm is swayably connected to the middle position of the support arm, and the other end of the second connecting arm is hinged to one end of the working platform.

5. The overhead platform assembly of claim 1, wherein, The base is located on the upper side of the support portion and is supported by the support portion; Multiple weighing sensors are connected to the bottom of the base facing the support part, and the multiple weighing sensors are distributed at different positions in the base facing the bottom of the support part. Multiple weighing sensors are located between the base and the support.

6. The lifting platform device according to claim 5, characterized in that, The base includes a load-bearing frame and a load-bearing plate; the load-bearing plate is laid on the upper surface of the load-bearing frame and is used to support the operator; The force-bearing frame has a trapezoidal structure and supports different positions of the force-bearing plate; the corresponding weighing sensors are connected to multiple corners of the force-bearing frame.

7. The overhead platform assembly of claim 6, wherein, The guardrail is connected to the base, and multiple guardrails are arranged in a square shape; one guardrail can be swayed to connect to another guardrail or the base, so that the guardrail is in a side-opening door state, and the operator in the receiving space can leave the receiving space when opening the guardrail.

8. The overhead platform assembly of claim 6, wherein, The lifting platform device also includes a control module, which is connected to one of the guardrails and located near the top of the guardrail. The control module has a housing, which is fixedly connected to the guardrail and located within the containment space.

9. The overhead platform assembly of claim 8, wherein, The control module also includes a main control board, which is built into the housing. The main control board integrates a clock and reset circuit, an external crystal oscillator circuit, a reset circuit, a power decoupling circuit, an SWD debugging interface circuit, an indicator light circuit, a power conversion and voltage regulation circuit, a communication and control execution circuit, a key input circuit, and a 4G communication module interface circuit.

10. An aerial work platform, characterized in that, Includes the lifting platform device as described in any one of claims 1 to 9.

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