An elevator door operator drive device
By separating the motor assembly and the frequency converter control mechanism and adopting an optimized heat dissipation and EMC shielding design, the problem of low space utilization in elevator control equipment is solved, achieving more efficient space utilization and system stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI JOWIN M&E CO LTD
- Filing Date
- 2025-09-18
- Publication Date
- 2026-07-17
AI Technical Summary
In existing elevator control equipment, the frequency converter and motor are integrated into one unit, which occupies a large space and is difficult to utilize effectively in the limited space inside the elevator door.
The motor assembly and the frequency converter control mechanism are connected separately via communication lines and can be detachably fixed to the main frame of the elevator door. They also feature optimized heat dissipation and EMC shielding designs, including communication line sealing, heat sinks, and EMC shielding covers.
It improves space utilization, simplifies wiring complexity, enhances system reliability and flexibility, and ensures long-term stability and signal integrity in complex environments.
Smart Images
Figure CN224512976U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of elevator control equipment, and in particular to an elevator door operator drive device. Background Technology
[0002] The application of frequency converters has expanded from common applications such as fans and water pumps to food, beverage, logistics, and building industries, continuously opening up new energy-saving fields. Their functions have also been enhanced and diversified. On the one hand, there are fully digital, feature-rich frequency converters with adaptive and self-tuning technologies capable of compensating for load changes, especially high-end distributed frequency converters with communication, networking capabilities, and integrated PLCs. On the other hand, there are simple or industry-specific frequency converters, as well as mechatronic and miniaturized frequency converters. Furthermore, due to the advent of new high-voltage power electronic devices, high-voltage and medium-voltage frequency converters have also seen significant development.
[0003] An elevator frequency converter is an instrument specifically designed for elevator control. As an important component of modern electrical control systems, it is a dedicated frequency conversion device specifically designed for the operating characteristics of elevators. As a high-end product in the field of small and medium power frequency converters, elevator-specific frequency converters achieve multiple technological advantages through advanced control algorithms: they not only significantly improve elevator operating efficiency and stability but also effectively extend the equipment's service life.
[0004] In typical existing elevator control equipment, the frequency converter and motor are integrated into one unit and placed inside the elevator for convenient control. However, this setup results in the equipment occupying a lot of space, making it difficult to use in situations where the interior space of the elevator door is limited, such as in villa elevators. Utility Model Content
[0005] To improve the space utilization of the motor and frequency converter combination structure in elevator control equipment and adapt to the limited installation space inside the elevator, this application provides an elevator door operator drive device, which adopts the following technical solution: An elevator door operator drive device includes a motor assembly and a frequency converter control mechanism; the motor assembly is electrically connected to the frequency converter control mechanism via a communication line; The motor assembly includes a protective shell and a drive circuit board; the protective shell is detachably connected to the main frame of the elevator door; the drive circuit board is disposed inside the protective shell and is used to control the rotation of the output end of the motor assembly. The inverter control mechanism includes a mounting box and an inverter control circuit board. The mounting box is detachably connected to the main frame of the elevator door, and the inverter control circuit board is fixedly installed in the mounting box. The inverter control circuit board is used to send inverter control signals to the drive circuit board.
[0006] By adopting the above technical solution, the core structure of the device is defined, including a motor assembly and a frequency converter control mechanism that are separately connected via communication lines, and both are detachably fixed to the main frame of the elevator door. This allows the motor assembly and frequency converter control mechanism to make more efficient use of limited space, provides greater convenience for the installation and layout of other equipment inside the elevator, reduces the complexity of overall wiring, and improves the reliability and flexibility of the system.
[0007] Optionally, the mounting box has at least two fixing holes extending outward from its edge, which are used to detachably connect the mounting box to the main frame of the elevator door using screws.
[0008] By adopting the above technical solution, and by setting at least two fixing holes on the edge of the mounting box and connecting them with screws, this design provides a robust and adjustable mechanical fixing method. This ensures the stability of the mounting box during elevator operation, prevents loosening or displacement caused by vibration, simplifies the disassembly process, facilitates on-site maintenance or upgrades, and improves the durability and operability of the device.
[0009] Optionally, the mounting box also has a first opening for passing the communication cable through and a second opening for heat dissipation and ventilation, with the first opening and the second opening located on opposite sides of the mounting box.
[0010] By adopting the above technical solution, the first opening on the mounting box is used for routing communication cables, and the second opening is used for heat dissipation and ventilation, with both located on opposite sides. This layout optimizes air convection, effectively promotes heat dissipation, and prevents the inverter control circuit board from overheating. At the same time, the separate opening design avoids interference between cables and heat dissipation paths, improving the system's heat dissipation efficiency and the convenience of cable management.
[0011] Optionally, a conductive rubber seal is provided at the first opening, the conductive rubber seal being arranged around the first opening and filling the gap when the communication line passes through the first opening.
[0012] By adopting the above technical solution, a conductive rubber seal is placed at the first opening and surrounds and fills the gap. This structure not only provides a good physical seal to prevent dust and moisture intrusion, but also achieves electromagnetic shielding through its conductive properties, reducing electromagnetic interference leakage during communication line transmission. This enhances the protection level and EMC performance of the device, ensuring the stability and reliability of signal transmission.
[0013] Optionally, the mounting box is provided with multiple heat sinks, which are located near the second opening.
[0014] By adopting the above technical solution, multiple heat sinks are installed on the mounting box near the second opening. This design significantly increases the heat dissipation surface area and utilizes airflow to accelerate heat dissipation. This effectively prevents the inverter control circuit board from degrading or being damaged due to high temperatures, improving the long-term operational stability of the device, and is especially suitable for high-load or high-temperature environments.
[0015] Optionally, it also includes an EMC shielding mechanism, which includes a shielding cover covering the surface of the inverter control circuit board, and the shielding cover is electrically isolated from the inverter control circuit board.
[0016] By adopting the above technical solution and introducing an EMC shielding mechanism, including a shielding cover that covers the inverter control circuit board and electrically isolates it from the circuit board, this measure effectively suppresses electromagnetic radiation generated by the circuit board and prevents external EMI interference with internal signals. Electrical isolation avoids grounding loop problems, comprehensively improving the electromagnetic compatibility (EMC) of the device and ensuring its reliable operation in sensitive electronic environments.
[0017] Optionally, the EMC shielding mechanism may further include a conductive layer disposed on the inner wall of the mounting box.
[0018] By adopting the above technical solution, a conductive layer is added to the inner wall of the mounting box as part of the EMC shielding mechanism. This layer forms a continuous shielding shell, enhancing the absorption and reflection of electromagnetic waves. This reduces gaps in electromagnetic leakage, provides additional protection, enhances the anti-interference capability of the inverter control circuit board, and simplifies the overall shielding design.
[0019] Optionally, the conductive layer is a conductive coating applied to the inner wall of the mounting box or a conductive shielding layer attached to the inner wall of the mounting box.
[0020] By adopting the above technical solution, the conductive layer is achieved by coating a conductive coating or attaching a conductive shielding layer, which facilitates manufacturing and cost control. Coating or attaching ensures the uniformity and integrity of the conductivity of the inner wall, providing efficient EMC shielding without complex processing, which is beneficial for large-scale production and overall lightweighting of the device.
[0021] Optionally, the shielding cover is electrically connected to the conductive layer on the inner wall of the mounting box via a conductive connector.
[0022] By employing the above technical solution, the shielding cover is electrically connected to the conductive layer on the inner wall of the mounting box via conductive connectors. This design establishes an electrically continuous shielding network, forming a complete Faraday cage structure. This maximizes the EMC shielding effect, eliminates electromagnetic leakage caused by potential gaps, and further improves the device's anti-interference performance and signal integrity.
[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The motor assembly and the frequency converter control mechanism are connected separately via communication lines, and both are fixed to the main frame of the elevator door in a detachable manner. This allows the motor assembly and the frequency converter control mechanism to make more efficient use of the limited space, providing more convenience for the installation and layout of other equipment inside the elevator, while reducing the complexity of the overall wiring and improving the reliability and flexibility of the system. 2. The coordinated design of the ventilation openings and heat sinks (opposite side openings + heat sink layout) forms an efficient air duct, which significantly reduces the risk of overheating of the inverter circuit. The conductive rubber seals not only prevent dust and moisture from entering, but also suppress electromagnetic interference through their conductivity, providing double protection for the stability of communication signals. These measures together enhance the long-term operational stability of the device in complex environments such as high temperature and dust. 3. The shielding cover covering the circuit board isolates internal radiation and external interference. The conductive layer on the inner wall of the mounting box forms a continuous shielding shell, blocking electromagnetic leakage gaps. The conductive connector connects the shielding cover to the conductive layer of the box. This system significantly improves the anti-electromagnetic interference capability and ensures the signal integrity and operational safety of the elevator electronic system in complex electromagnetic environments. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of the device; Figure 2 This is a schematic diagram of the internal structure of the motor assembly; Figure 3 This is a schematic diagram of the inverter control mechanism from the second opening perspective; Figure 4 This is a schematic diagram of the internal structure of the inverter control mechanism; In the picture, 1. Motor assembly; 11. Protective housing; 12. Drive circuit board; 2. Inverter control mechanism; 21. Mounting housing; 211. Fixing hole; 212. First opening; 213. Second opening; 22. Inverter control circuit board. 3. EMC shielding mechanism; 31. Shielding cover; 4. Communication cable; 5. Heat sink. Detailed Implementation
[0025] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail below.
[0026] An elevator door operator drive device, as described in the reference Figure 1 and Figure 2The system includes a motor assembly 1 and a frequency converter control mechanism 2, which are electrically connected via a communication line 4 to work together to achieve precise control of the elevator door motor. The motor assembly 1 includes a protective housing 11, which is designed to be detachable, allowing for easy installation and fixation to the main frame of the elevator door using methods such as bolts, clips, or quick-release brackets. This protective housing 11 primarily provides physical protection and support. Inside the protective housing 11, a drive circuit board 12 is fixedly installed. This drive circuit board 12 is the core control unit of the motor assembly 1, and is an existing circuit board, model number KM760313H06. Its core function is to directly drive and control the rotation of the output shaft of the motor assembly 1, i.e., to control the motor that drives the elevator door. It receives and executes commands from the frequency converter control mechanism 2.
[0027] Reference Figure 3 The inverter control mechanism 2 includes a mounting housing 21. Similar to the protective shell 11 of the motor assembly 1, this mounting housing 21 is also designed as a detachable structure, capable of being independently installed and fixed to the main frame of the elevator door, typically installed near the motor assembly 1 or in a location convenient for wiring distribution. This mounting housing 21 provides physical protection and a mounting base for the inverter control circuit board 22. Inside the mounting housing 21, an inverter control circuit board 22 is securely fixed. The inverter control circuit board 22 is also existing technology, and its model can be HIVD900SS / HIVD900G. Its main function is to generate precise inverter control signals according to the instructions or preset logic of the elevator control system.
[0028] Reference Figure 1 One or more communication cables, such as CAN bus, RS485, Ethernet, or other fieldbuses, are used to electrically connect the output port of the inverter control circuit board 22 to the input port of the drive circuit board 12. During operation, the inverter control circuit board 22 generates frequency conversion control signals, including commands such as speed, direction, and torque, which are transmitted to the drive circuit board 12 in real time via the communication cable. Upon receiving the frequency conversion control signals, the drive circuit board 12 analyzes and processes them, and accordingly precisely controls the speed, direction, and operating status of the motor connected to its output terminal, thereby driving the elevator door to complete opening and closing actions.
[0029] The motor assembly 1 and the frequency converter control mechanism 2 are connected separately via communication cable 4, and both are detachably fixed to the main frame of the elevator door. Through reasonable component layout and housing design, the motor assembly 1 and the frequency converter control mechanism 2 can make more efficient use of limited space, providing greater convenience for the installation and layout of other equipment inside the elevator, while reducing the complexity of overall wiring and improving the reliability and flexibility of the system.
[0030] Furthermore, refer to Figure 1 and Figure 3 The mounting box 21 has at least two fixing holes 211 extending outward from its edge. These fixing holes 211 allow the mounting box 21 to be detachably connected to the main frame of the elevator door using screws. This provides a robust and adjustable mechanical fixing method, ensuring the stability of the mounting box 21 during elevator operation, preventing loosening or displacement caused by vibration, while also simplifying the disassembly process, facilitating on-site maintenance or upgrades, and improving the durability and operability of the device.
[0031] Furthermore, refer to Figure 1 and Figure 3 The mounting box 21 also has a first opening 212 for passing the communication cable 4 and a second opening 213 for heat dissipation and ventilation. The first opening 212 and the second opening 213 are located on opposite sides of the mounting box 21. The output port of the inverter control circuit board 22 is located at the first opening 212, which is used to pass the communication cable 4. This layout optimizes air convection, effectively promotes heat dissipation, and prevents the inverter control circuit board 22 from overheating. At the same time, the separate opening design avoids interference between the cable and the heat dissipation path, improving the system's heat dissipation efficiency and the convenience of cable management.
[0032] Furthermore, refer to Figure 4 To enhance the heat dissipation of the inverter control mechanism 2, multiple heat sinks 5 are installed on the mounting housing 21 near the second opening 213. These heat sinks 5 increase the heat dissipation surface area and utilize airflow to accelerate heat dissipation. This effectively prevents the inverter control circuit board 22 from degrading or being damaged due to high temperatures, thus improving the long-term operational stability of the device.
[0033] Furthermore, to prevent dust from entering the first opening 212 and the second opening 213, a conductive rubber seal is provided at the first opening 212 and surrounds and fills the gap. This structure not only provides a good physical seal to prevent dust and moisture from entering, but also achieves electromagnetic shielding through its conductive properties, reducing electromagnetic interference leakage during the transmission of communication line 4. Meanwhile, a mesh structure such as gauze is provided at the second opening 213, which does not hinder ventilation and heat dissipation, and can also isolate dust.
[0034] Furthermore, refer to Figure 3 and Figure 4 The device also includes an EMC shielding mechanism 3, which comprises a shielding cover 31 covering the surface of the inverter control circuit board 22. The shielding cover 31 is electrically isolated from the inverter control circuit board 22. Electrical isolation is achieved by using isolation devices, such as transformers, optocouplers, and relays, to block direct electrical connections between circuits, thus enabling the transmission of signals or energy without direct conductor connections. This ensures safety and prevents electric shock.
[0035] The EMC shielding mechanism 3 also includes a conductive layer disposed on the inner wall of the mounting housing 21. As part of the EMC shielding mechanism 3, this layer forms a continuous shielding shell, enhancing the absorption and reflection of electromagnetic waves. This reduces gaps in electromagnetic leakage, provides additional protection, enhances the anti-interference capability of the inverter control circuit board 22, and simplifies the overall shielding design.
[0036] Furthermore, the conductive layer is made by coating a conductive coating or attaching a conductive shielding layer, which facilitates manufacturing and cost control. Coating or attaching ensures the uniformity and integrity of the conductivity of the inner wall, and can provide efficient EMC shielding without complicated processing.
[0037] Furthermore, the shielding cover 31 is electrically connected to the conductive layer on the inner wall of the mounting box 21 by conductive connectors. The conductive connectors can be structural components such as springs, metal screws, conductive foam, and metal braided strips, which improves the EMC shielding effect and eliminates electromagnetic leakage caused by potential gaps.
[0038] The implementation principle of this application embodiment is as follows: One or more communication cables are used to electrically connect the output port of the inverter control circuit board 22 to the input port of the drive circuit board 12. During operation, the inverter control circuit board 22 generates frequency conversion control signals (including speed, direction, torque, and other command information) which are transmitted to the drive circuit board 12 in real time via the communication cables. After receiving the frequency conversion control signals, the drive circuit board 12 analyzes and processes them, and accordingly precisely controls the speed, direction, and operating status of the motor connected to its output terminal, thereby driving the elevator door to complete opening and closing actions.
[0039] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.
Claims
1. An elevator door machine drive apparatus, characterized by, It includes a motor assembly (1) and a frequency converter control mechanism (2); the motor assembly (1) is electrically connected to the frequency converter control mechanism (2) via a communication line (4); The motor assembly (1) includes a protective shell (11) and a drive circuit board (12); the protective shell (11) is detachably connected to the main frame of the elevator door; the drive circuit board (12) is disposed inside the protective shell (11) and is used to control the rotation of the output end of the motor assembly (1); The inverter control mechanism (2) includes a mounting box (21) and an inverter control circuit board (22). The mounting box (21) is detachably connected to the main frame of the elevator door. The inverter control circuit board (22) is fixedly installed inside the mounting box (21). The inverter control circuit board (22) is used to send inverter control signals to the drive circuit board (12).
2. An elevator door drive as defined in claim 1, characterized in that The mounting box (21) has at least two fixing holes (211) extending outward from its edge. The fixing holes (211) are used to detachably connect the mounting box (21) to the main frame of the elevator door by screws.
3. An elevator door drive as defined in claim 2, characterized in that The mounting box (21) is also provided with a first opening (212) for passing through the communication line (4) and a second opening (213) for heat dissipation and ventilation. The first opening (212) and the second opening (213) are located on opposite sides of the mounting box (21).
4. An elevator door drive as defined in claim 3, characterized in that A conductive rubber seal is provided at the first opening (212). The conductive rubber seal is arranged around the first opening (212) and fills the gap when the communication line (4) passes through the first opening (212).
5. An elevator door drive as defined in claim 3, characterized in that The mounting box (21) is provided with a plurality of heat sinks (5), and the heat sinks (5) are located near the second opening (213).
6. An elevator door drive as defined in claim 1, characterized in that It also includes an EMC shielding mechanism (3), which includes a shielding cover (31) covering the surface of the inverter control circuit board (22), and the shielding cover (31) is electrically isolated from the inverter control circuit board (22).
7. An elevator door drive as defined in claim 6, characterized in that The EMC shielding mechanism (3) also includes a conductive layer disposed on the inner wall of the mounting box (21).
8. An elevator door drive as defined in claim 7, characterized in that The conductive layer is a conductive coating applied to the inner wall of the mounting box (21) or a conductive shielding layer attached to the inner wall of the mounting box (21).
9. An elevator door drive according to claim 6 or 7, characterized in that The shield (31) is electrically connected to the conductive layer on the inner wall of the mounting box (21) via a conductive connector.