Electric dual-mode emergency folding device for space launch site mobile platform

Abstract

The utility model discloses a kind of aerospace launching site movable platform electric dual-mode emergency folding device, it is related to movable platform technical field, including fixed frame, the inner wall of fixed frame is fixedly connected with base, the upper surface of base is equipped with the direct-current speed reducer and winch of adaptation, the utility model integrates 220V AC power supply and 48V DC battery dual working mode, when commercial power is stable, rely on 220V AC mode to guarantee efficient operation, when encountering emergency such as sudden power failure, only need manual operation mode change-over switch, system will immediately start 48V DC battery mode, whole process seamlessly links, response is quick, ensure that emergency function continues stable operation, and power coupling of DC motor and AC motor can be realized, accurate control motor speed and torque output, keep stable operating state each time, avoid the phenomenon of shafting caused by uneven stress, prolong the service life of equipment, effectively improve system operation reliability.

Description

Technical Field

[0001] This utility model relates to the field of mobile platform technology, specifically an electric dual-mode emergency retraction device for aerospace launch site mobile platforms. Background Technology

[0002] With the increasing number of test missions each year, the safety and reliability of the platform system have received more attention. The launch site mobile platform is mainly used to carry personnel and equipment to work on the mobile platform, and to complete tasks such as hoisting and docking of products, instrument installation, laying of cables and gas and liquid pipelines, product testing, fuel loading, pre-launch inspection, and routine equipment maintenance. If the mobile platform suddenly malfunctions during the mission and cannot complete the platform retraction and leveling operations normally, it will directly affect the smooth progress of the entire launch mission. Ensuring that the mobile platform can complete emergency operations is crucial.

[0003] Currently, the common practice is to install a handle, manually unlock the motor's tail brake, and manually retract the platform to ensure mission success. However, this manual method has several drawbacks: operators must continuously crank the handle throughout the entire process, relying entirely on human power to retract the platform. This process is time-consuming and difficult to respond quickly in emergency situations where every second counts, severely limiting emergency response efficiency. During operation, operators must continuously exert force, which can easily lead to fatigue. As physical strength depletes, not only will operational movements become distorted and less precise, but the platform's operational performance will also be directly affected, increasing the risk of misoperation. Manual emergency operation is highly dependent on the operator's physical strength and skill level, making it difficult to accurately and stably control the motor shaft's rotation force. This unstable force can generate abnormal axial impact on the motor shaft, leading to shaft misalignment, severely impacting equipment reliability and lifespan, and posing significant safety hazards. Therefore, we provide an electric dual-mode emergency retraction device for aerospace launch site mobile platforms to address these issues. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an electric dual-mode emergency retraction device for aerospace launch site mobile platforms.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electric dual-mode emergency retraction device for a space launch site mobile platform, comprising a fixed frame, a base fixedly connected to the inner wall of the fixed frame, a compatible DC geared motor and a winch mounted on the upper surface of the base, a sliding seat slidably connected to the inner wall of the fixed frame, an AC motor mounted on the upper surface of the AC motor, a card adapted to the input end of the DC geared motor fixedly connected to the output shaft end of the AC motor, a DC mobile power supply fixedly connected to the inner wall of the sliding seat, a steel wire rope fixedly connected to the outer surface of the winch, with the end of the steel wire rope away from the winch fixed to the fixed frame, a fixed platform body fixedly connected to the outer surface of the fixed frame, a mobile platform body hinged to the inner wall of the fixed platform body via pins, four second guide rollers mounted on the bottom surface of the mobile platform body, first guide rollers mounted on both the inner wall and outer surface of the fixed frame, and both the first and second guide rollers being drivenly connected to the steel wire rope, and a control panel for controlling the emergency retraction of the space launch site mobile platform mounted on the inner wall of the fixed frame.

[0006] Furthermore, the DC geared motor is a power device composed of a DC motor and a reducer. The DC motor works based on the principle of electromagnetic induction. When the 48V DC power supply is turned on, the current flows into the motor windings. Under the action of the stator magnetic field, the rotor windings are subjected to electromagnetic force to generate torque, causing the rotor to rotate at a speed of 3000 rpm, realizing the conversion of electrical energy into mechanical energy. The reducer uses the principle of gear transmission. Through the meshing of gears, the rotational power of the rotor is transmitted to the input shaft of the reducer. Through internal gear transmission, the speed is reduced by a speed ratio of 12.5 while increasing the torque. Finally, the load is driven to operate with an output speed of 240 rpm and an output torque of 11.62 rpm.

[0007] Furthermore, the control panel integrates a running speed display, mode conversion switch, speed control switch, DC mode switch, AC mode switch, switching power supply, DC motor driver, and AC / DC contactor, enabling precise control of the emergency retraction mode of the space launch site mobile platform and improving ease of use.

[0008] Furthermore, the outer surface of the fixed frame and the upper surface of the movable platform body are both fixedly connected to two fixed ends, and a chain is fixedly connected between the two fixed ends on the same side. By setting the fixed ends and the chain, the flat position of the space launch site movable platform can be limited, thereby improving the stability of the space launch site movable platform during use.

[0009] Furthermore, a fixing block is fixedly connected to the outer surface of the sliding seat, and a screw is threadedly connected to the inner wall of the fixing block. A limit block and an adjusting handle are fixedly connected to the bottom and top of the screw, respectively. Rotating the adjusting handle can drive the limit block to move up and down through the screw. When the limit block moves to fit against the base, it can lock the position of the sliding seat after movement, thereby limiting the position of the AC motor after movement, ensuring accurate installation of the transmission components and preventing vibration and noise during operation.

[0010] Furthermore, the reserved slot on the inner wall of the fixed frame for the passage of the wire rope is much larger than the diameter of the wire rope, which can prevent the wire rope from being obstructed during the winding process, thereby improving the stability of the device during use.

[0011] Furthermore, a platform locking device is installed on the outer surface of the fixed frame, and a locking buckle is fixedly connected to the upper surface of the movable platform body. The platform locking device and the locking buckle are compatible. By setting the platform locking device and the locking buckle, the movable platform body can be limited and fixed after being retracted, thereby improving the stability of the movable platform body after being retracted.

[0012] Furthermore, two dampers are installed on the outer surface of the fixed frame to improve the protection performance of the movable platform body when it is retracted. By setting the dampers, damage caused by collision between the movable platform body and the fixed frame when it is retracted can be avoided. The reset effect of the dampers can also improve the convenience of the movable platform body when it is laid down. A closed door is installed on the inner wall of the fixed frame. By setting the closed door, the area of ​​the movable platform body can be sealed off.

[0013] Compared with existing technologies, the electric dual-mode emergency recovery device for the space launch site's mobile platform has the following advantages:

[0014] 1. This utility model integrates a dual working mode of 220V AC power supply and 48V DC battery. When the mains power is stable, the 220V AC mode ensures efficient operation. In case of emergencies such as sudden power outages, the system will immediately start the 48V DC battery mode by manually operating the mode switch. The whole process is seamless and responsive, ensuring continuous and stable operation of the emergency function. It can also realize the power coupling between DC motor and AC motor, accurately control the motor speed and torque output, and maintain a stable operating state in each operation. This avoids shaft slippage caused by uneven force, extends the service life of the equipment, and effectively improves the reliability of system operation.

[0015] 2. This utility model, by setting a connecting block, can limit the retraction position of the space launch site mobile platform. Through the cooperation between the fixing block, screw, limit block and adjusting handle, the position of the AC motor after movement can be limited, thereby ensuring the accurate installation of transmission components and preventing vibration and noise during operation. By setting a platform locking device and locking buckle, the mobile platform body can be limited and fixed after retraction, thereby improving the stability of the mobile platform body after retraction. By setting a damper, damage caused by collision between the mobile platform body and the fixed frame during retraction can be avoided, and the reset effect of the damper can improve the convenience of flattening the mobile platform body. By setting a sealing door, the area of ​​the mobile platform body can be sealed off. Attached Figure Description

[0016] Figure 1 This is a front view of the three-dimensional structure of this utility model;

[0017] Figure 2 This is a right-side view of the three-dimensional structure of this utility model;

[0018] Figure 3 This is a left-side view of the three-dimensional structure of this utility model;

[0019] Figure 4 This is a bottom view of the three-dimensional structure of this utility model;

[0020] Figure 5 This is a schematic diagram showing the connection between the DC geared motor and the winch of this utility model;

[0021] Figure 6 This is a schematic diagram of a partial structural connection of the present invention.

[0022] In the diagram: 1. Fixed frame; 2. Base; 3. DC geared motor; 4. Winch; 5. Sliding seat; 6. AC motor; 7. Card holder; 8. DC mobile power supply; 9. Steel wire rope; 10. Fixed platform body; 11. Movable platform body; 12. First guide roller; 13. Second guide roller; 14. Control panel; 15. Fixed end; 16. Chain; 17. Fixed block; 18. Screw; 19. Limit block; 20. Adjusting handle; 21. Platform locking device; 22. Locking latch; 23. Damper; 24. Sealing door. Detailed Implementation

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0024] As described in the background section, manually retracting a space launch site mobile platform severely restricts emergency response efficiency, and prolonged continuous operation easily leads to fatigue. As physical strength is continuously depleted, not only will operational movements become distorted and precision reduced, but the platform's operational effectiveness will also be directly affected, increasing the risk of misoperation. At the same time, the operator's physical strength and skill level have a significant impact, making it difficult to accurately and stably control the rotation force of the motor shaft. This unstable force state will generate abnormal axial impact force on the motor shaft, leading to shaft misalignment, which seriously affects the reliability and service life of the equipment and poses a significant safety hazard. Therefore, this embodiment provides an electric dual-mode emergency retraction device for a space launch site mobile platform.

[0025] See Figures 1 to 6 This embodiment proposes an electric dual-mode emergency retraction device for a space launch site mobile platform, including a fixed frame 1, a base 2 fixedly connected to the inner wall of the fixed frame 1, and a compatible DC geared motor 3 and winch 4 installed on the upper surface of the base 2.

[0026] The DC geared motor 3 is a power device composed of a DC motor and a gear reducer. The DC motor works based on the principle of electromagnetic induction. When the 48V DC power supply is turned on, the current flows into the motor windings. Under the action of the stator magnetic field, the rotor windings are subjected to electromagnetic force to generate torque, causing the rotor to rotate at 3000 RPM, realizing the conversion of electrical energy into mechanical energy. The gear reducer uses the principle of gear transmission. Through the meshing of gears, the rotational power of the rotor is transmitted to the input shaft of the gear reducer. Through internal gear transmission, the speed is reduced by a speed ratio of 12.5 while increasing the torque. Finally, the load is driven to operate with an output speed of 240 RPM and an output torque of 11.62.

[0027] A sliding seat 5 is slidably connected to the inner wall of the fixed frame 1. An AC motor 6 is mounted on the upper surface of the AC motor 6. A card holder 7 that is compatible with the input end of the DC geared motor 3 is fixedly connected to the output shaft end of the AC motor 6. A DC mobile power supply 8 is fixedly connected to the inner wall of the sliding seat 5. A wire rope 9 is fixedly connected to the outer surface of the winch 4, and the end of the wire rope 9 away from the winch 4 is fixed to the fixed frame 1.

[0028] When the DC geared motor 3 is connected to the power supply and started, it can drive the winch 4 to rotate, thereby winding the wire rope 9. The input end of the DC geared motor 3 can be retracted into the card holder 7, thereby using the cooperation of the AC motor 6 and the card holder 7 to drive the input end of the base 2 to rotate. At the same time, the AC motor 6 can be powered by the sliding seat 5, which is a 48V battery.

[0029] The reserved slot on the inner wall of the fixed frame 1 for the passage of the wire rope 9 is much larger than the diameter of the wire rope 9, which can prevent the wire rope 9 from being obstructed during the winding process, thereby improving the stability of the device during use.

[0030] A fixing block 17 is fixedly connected to the outer surface of the sliding seat 5. A screw 18 is threadedly connected to the inner wall of the fixing block 17. A limit block 19 and an adjusting handle 20 are fixedly connected to the bottom and top ends of the screw 18, respectively.

[0031] Rotating the adjustment handle 20 can drive the limit block 19 to move up and down via the screw 18. When the limit block 19 moves to fit against the base 2, it can lock the position of the moved sliding seat 5, thereby limiting the position of the moved AC motor 6 to ensure accurate installation of the transmission components and prevent vibration and noise during operation.

[0032] A fixed platform body 10 is fixedly connected to the outer surface of the fixed frame 1. A movable platform body 11 is hinged to the inner wall of the fixed platform body 10 via a pin. Four second guide rollers 13 are installed on the bottom surface of the movable platform body 11. First guide rollers 12 are installed on both the inner wall and the outer surface of the fixed frame 1. Both the first guide rollers 12 and the second guide rollers 13 are connected to the wire rope 9 for transmission.

[0033] After the wire rope 9 rotates, it can drive the movable platform body 11 to rotate around the hinge point between the fixed platform body 10 and the movable platform body 11 through the transmission action between the first guide roller 12 and the second guide roller 13, thereby realizing the retraction of the movable platform body 11.

[0034] Two fixed ends 15 are fixedly connected to the outer surface of the fixed frame 1 and the upper surface of the movable platform body 11. A chain 16 is fixedly connected between the two fixed ends 15 on the same side. By setting the fixed ends 15 and the chain 16, the flat position of the space launch site movable platform can be limited, thereby improving the stability of the space launch site movable platform during use.

[0035] A platform locking device 21 is installed on the outer surface of the fixed frame 1, and a locking buckle 22 is fixedly connected to the upper surface of the movable platform body 11. The platform locking device 21 and the locking buckle 22 are adapted to each other. By setting the platform locking device 21 and the locking buckle 22, the movable platform body 11 can be limited and fixed after being retracted, thereby improving the stability of the movable platform body 11 after being retracted.

[0036] Two dampers 23 are installed on the outer surface of the fixed frame 1 to improve the protection performance of the movable platform body 11 when it is retracted. By setting the dampers 23, damage caused by collision between the movable platform body 11 and the fixed frame 1 when it is retracted can be avoided. The reset effect of the dampers 23 can also improve the convenience of the movable platform body 11 when it is laid down. A sealing door 24 is installed on the inner wall of the fixed frame 1. By setting the sealing door 24, the area of ​​the movable platform body 11 can be sealed off.

[0037] The inner wall of the fixed frame 1 is equipped with a control panel 14 for controlling the emergency retraction of the space launch site mobile platform. The control panel 14 integrates a running speed display, mode conversion switch, speed control switch, DC mode switch, AC mode switch, switching power supply, DC motor driver and AC / DC contactor, which can realize precise control of the emergency retraction mode of the space launch site mobile platform and improve the convenience of use.

[0038] The speed control switch can be used to adjust the speed of the DC geared motor 3 and the AC motor 6. The speed display uses a five-digit LED digital tube, which can clearly and accurately display the motor speed. At the same time, the mode switch can be used to switch the movable platform body 11 to either the retracted or flat state.

[0039] As the core control unit of the system, the DC motor driver integrates power conversion and driving functions. By processing the DC power supply through pulse width modulation (PWM) and frequency conversion, it provides suitable driving energy for the DC motor. Based on advanced algorithms such as vector control (FOC) or direct torque control (DTC), the driver can adjust the output voltage amplitude and frequency through a potentiometer to achieve high-precision closed-loop control of the motor speed, which can meet the response requirements under different operating conditions.

[0040] In terms of functionality, the driver not only supports motor forward and reverse rotation and start / stop control, but also has multiple built-in protection mechanisms. By monitoring key parameters such as current, voltage, and temperature in real time, it can quickly trigger protection functions such as overcurrent protection (OCP), overvoltage protection (OVP), and overheat protection (OTP) to protect and monitor the motor, ensuring the stable and reliable operation of the entire device.

[0041] Switching power supplies are used to convert external AC power into a stable DC voltage required by the device. In 220V AC mode, they can convert the mains voltage into a DC voltage suitable for the operation of devices such as brushless motor drivers, ensuring stable operation and preventing damage to motors and other electronic components due to voltage fluctuations. When the device is in 48V battery DC mode, the switching power supply can work with the battery to regulate and stabilize the battery output voltage, ensuring that the voltage output to the motor driver remains within a suitable range as the battery charge changes, thus maintaining stable motor performance.

[0042] Switching power supplies typically have overvoltage and overcurrent protection functions, which can prevent damage to equipment due to excessive voltage or current when abnormal conditions occur. At the same time, they can also filter the power supply to reduce high-frequency noise and interference, providing a clean power supply for sensitive electronic devices such as motor drivers, enabling them to accurately control the motor, and thus ensuring that the mobile platform can be quickly, safely, and effortlessly retracted in emergency situations.

[0043] The AC / DC contactor enables power mode switching. When the 220V AC power supply is connected to the device circuit, it powers the switching power supply and other equipment, enabling the motor driver to drive the DC motor. Turning the mode switch to the AC position activates the AC contactor, allowing the platform to be retracted. Simultaneously, the DC contactor disconnects, cutting off the connection between the 48V portable battery and the device circuit to prevent potential short circuits. When the 48V portable battery powers the device, enabling the motor driver to drive the DC motor, turning the mode switch to the DC position activates the DC contactor, allowing the platform to be retracted. In this case, the AC contactor disconnects, preventing the 220V AC power supply from connecting to the device circuit and avoiding potential short circuits.

[0044] This switching mechanism ensures that the AC and DC modes are independent and do not interfere with each other. In AC mode, the device is powered entirely by AC power, and the DC circuit is disconnected. Similarly, in DC mode, the AC circuit is cut off, avoiding possible short circuits.

[0045] The components in the accompanying drawings of this utility model are for styling reference only and are not specific dimensional standards. The specific dimensions are determined according to the actual production requirements, and the materials of each component can be replaced accordingly based on actual needs.

[0046] All electrical components in this invention are commercially available, conventional equipment known to those skilled in the art. Models can be selected or customized according to actual needs. The setting method, installation method, and electrical connection method can be easily understood by those skilled in the art by following the instructions for use, and will not be described in detail here.

[0047] Working principle: In actual use, the platform operator first checks that the space launch site mobile platform needs to be retracted using an electric emergency device. After confirming that the platform's working status is correct, the operator controls the sliding seat 5 to slide along the inner wall of the base 2, so that the input end of the DC geared motor 3 can be retracted into the card holder 7. Then, by rotating the adjustment handle 20, the limit block 19 can be moved up and down through the screw 18. When the limit block 19 moves to fit with the base 2, it can lock the position of the sliding seat 5 after movement, thereby limiting the position of the AC motor 6 after movement, so as to ensure that the transmission components are installed accurately and prevent vibration and noise during operation.

[0048] When operating in AC mode, the mode switch on the device can be turned to the AC position. At this time, the AC contactor will be engaged, and the 220V AC power will be connected. Then, turn the "retract / flatten" mode switch to the platform retracted state. Then, turn the speed control switch. The platform operator needs to closely observe the platform's operating status. Rotate the speed control switch clockwise, and the AC motor 6 will speed up, and the platform retracting speed will increase accordingly. At the same time, the operator should observe the digital display to ensure that the speed is within the appropriate range. The speed control switch controls the AC motor 6 to start, which can drive the input end of the DC geared motor 3 to rotate through the card holder 7, thereby driving the winch 4 to rotate, and then winding the wire rope 9. Through the transmission action between the first guide roller 12 and the second guide roller 13, the movable platform body 11 will rotate around the hinge point between the fixed platform body 10 and the movable platform body 11 as the center, thereby realizing the retraction of the movable platform body 11.

[0049] When operating in DC mode, first rotate the speed control switch counterclockwise to the zero position to stop the AC motor 6. Then, turn the mode switch on the device to the DC position. At this time, the DC contactor will engage, and the 48V DC power will be connected. Rotate the speed control switch clockwise to increase the speed of the DC geared motor 3 and continue to complete the platform retraction operation. The operator should simultaneously observe the digital display to ensure that the speed is kept within a reasonable range. The platform operator should continue to observe the platform's operating status. If neither of the above two methods is used, the operator can control the sliding seat 5 to move away from the DC geared motor 3 and leave a certain space so that the traditional handle can be used to manually retract the space launch site mobile platform.

Claims

1. An electric dual-mode emergency retraction device for a space launch site mobile platform, comprising a fixed frame (1), characterized in that: The inner wall of the fixed frame (1) is fixedly connected to the base (2), and the upper surface of the base (2) is equipped with a matching DC geared motor (3) and a winch (4). The inner wall of the fixed frame (1) is slidably connected to the sliding seat (5). The upper surface of the AC motor (6) is equipped with the AC motor (6). The output shaft end of the AC motor (6) is fixedly connected to the card seat (7) that is compatible with the input end of the DC geared motor (3). The inner wall of the sliding seat (5) is fixedly connected to the DC mobile power supply (8). The outer surface of the winch (4) is fixedly connected to the wire rope (9), and the end of the wire rope (9) away from the winch (4) is fixed to the fixed frame (1). The outer surface of the fixed frame (1) is fixedly connected to the fixed platform body (10). The inner wall of the fixed platform body (10) is hinged to the movable platform body (11) by a pin. Four second guide rollers (13) are installed on the bottom surface of the movable platform body (11). The inner wall and outer surface of the fixed frame (1) are both equipped with first guide rollers (12). The first guide rollers (12) and the second guide rollers (13) are both connected to the steel wire rope (9) for transmission. The inner wall of the fixed frame (1) is equipped with a control panel (14) for controlling the emergency retraction of the movable platform at the space launch site.

2. The electric dual-mode emergency retraction device for a space launch site mobile platform according to claim 1, characterized in that: The DC geared motor (3) is a power device composed of a DC motor and a speed reducer.

3. The electric dual-mode emergency retraction device for a space launch site mobile platform according to claim 1, characterized in that: The control panel (14) integrates a running speed display, a mode conversion switch, a speed control switch, a DC mode switch, an AC mode switch, a switching power supply, a DC motor driver, and AC / DC contactors.

4. The electric dual-mode emergency retraction device for a space launch site mobile platform according to claim 1, characterized in that: The outer surface of the fixed frame (1) and the upper surface of the active platform body (11) are both fixedly connected to two fixed ends (15), and a chain (16) is fixedly connected between the two fixed ends (15) on the same side.

5. The electric dual-mode emergency retraction device for a space launch site mobile platform according to claim 1, characterized in that: A fixing block (17) is fixedly connected to the outer surface of the sliding seat (5), and a screw (18) is threadedly connected to the inner wall of the fixing block (17). A limit block (19) and an adjusting handle (20) are fixedly connected to the bottom and top of the screw (18), respectively.

6. The electric dual-mode emergency retraction device for a space launch site mobile platform according to claim 1, characterized in that: The reserved slot for the transmission of the wire rope (9) on the inner wall of the fixed frame (1) is much larger than the diameter of the wire rope (9).

7. The electric dual-mode emergency retraction device for a space launch site mobile platform according to claim 1, characterized in that: The platform locking device (21) is installed on the outer surface of the fixed frame (1), and the upper surface of the movable platform body (11) is fixedly connected with a locking buckle (22), and the platform locking device (21) and the locking buckle (22) are compatible.

8. The electric dual-mode emergency retraction device for a space launch site mobile platform according to claim 1, characterized in that: Two dampers (23) are installed on the outer surface of the fixed frame (1) to improve the protection performance of the retracted platform body (11), and a closed door (24) is installed on the inner wall of the fixed frame (1).

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