An anti-overturning device for the landing of an airdrop system

Abstract

The invention discloses an airdrop system landing anti-rollover device, comprising an anti-rollover bracket, a height and level measurement module, a fixed-force electric cable collection mechanism, a ground anchor and a controller, wherein the anti-rollover bracket is fixed on an airdrop cargo platform, the fixed-force electric cable collection mechanism and the height and level measurement module are arranged on the anti-rollover bracket, the fixed-force electric cable collection mechanism is connected to the ground anchor through a directional anti-rollover connecting rope, and the height and level measurement module and the fixed-force electric cable collection mechanism are respectively connected to the controller. The device has a simple structure, is easy to use, has good adaptability, and has a low cost, is suitable for airdrop landing of heavy equipment and valuable equipment, can reduce the probability of equipment damage, and improve airdrop efficiency.

Description

Technical Field

[0001] The present invention relates to an anti - overturning device for an airdrop system during landing. Background Art

[0002] The landing of the airdrop system is greatly affected by changes in environmental factors. Changes in the wind field, terrain and altitude of the airdrop site, and changes in the center of gravity of the equipment all interfere with the landing state of the airdrop system. Moreover, the attitude - adjustment ability of the existing anti - overturning devices does not match the environmental complexity, resulting in the airdrop system overturning during landing, which limits the use of the airdrop system to a certain extent.

[0003] The airdrop system currently adopts passive anti - overturning and stabilizing technologies, including anti - overturning bracket stabilizing technology and directional anti - overturning stabilizing technology. Among them, the anti - overturning bracket stabilizing technology uses an anti - overturning bracket structure installed and fixed on the cargo platform. During landing, the width of the side of the cargo platform is widened to prevent the cargo platform from tipping over. The directional anti - overturning stabilizing technology uses a ground anchor to grip the ground, and then the connecting rope is stressed and pulls the cargo platform to rotate and land with the wind, avoiding landing with the windward side facing the wind.

[0004] When the anti - overturning bracket (or anti - overturning plate) is installed, it does not occupy the width of the cargo platform. After the airdrop system leaves the aircraft for airdrop, it unfolds according to the working procedure. The anti - overturning bracket (or anti - overturning plate) increases the self - weight of the system, increasing the risk of the parachute rope being hooked. Moreover, if the anti - overturning bracket (or anti - overturning plate) unfolds accidentally in the cabin in advance, it will cause a serious flight accident. Therefore, the reliability requirements for the anti - overturning bracket (or anti - overturning plate) are relatively high.

[0005] The landing of the airdrop system is greatly affected by changes in environmental factors. Changes in the wind field, terrain and altitude of the airdrop site, and changes in the center of gravity of the equipment all interfere with the landing state of the airdrop system. Moreover, the attitude - adjustment ability of the existing anti - overturning devices does not match the environmental complexity, resulting in the airdrop system overturning during landing, which limits the use of the airdrop system to a certain extent.

[0006] The directional anti - overturning device uses components such as a ground anchor and a directional anti - overturning connecting rope. During the steady - descent process of the airdrop system after deployment, the directional anti - overturning device is opened, and the ground anchor and the connecting rope connected to the long axis at the tail of the equipment are thrown to the ground. After the ground anchor lands, it grips the ground under the action of the wind and tightens the connecting rope, rotating the equipment to land with the wind. When the wind force is small, the connecting rope cannot be tightened, resulting in no stabilizing effect. At the same time, it cannot sense the rotation state of the equipment, and the released connecting rope may also hook the bottom edge of the rotating equipment when tightened, causing the ground anchor not necessarily to pull the equipment to rotate along the long axis of the equipment, resulting in the long axis of the equipment being almost perpendicular to the flight direction during landing and the equipment overturning.

[0007] The anti - overturning bracket stabilizing technology and the directional anti - overturning stabilizing technology have certain limitations and cannot adapt to the airdrop system in complex environments. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide an anti - overturning device for the landing of an airdrop system, which addresses the above - mentioned defects in the prior art. The device has a simple structure, is easy to use, has good adaptability, and a relatively low cost. It is suitable for the airdrop landing of heavy equipment and valuable equipment, can reduce the probability of equipment damage, and improve the airdrop efficiency.

[0009] The technical solution adopted by the present invention to solve the above - mentioned technical problem is as follows:

[0010] An anti - overturning device for the landing of an airdrop system includes an anti - overturning bracket, a height and horizontal measurement module, a constant - force electric cable - retracting mechanism, a ground anchor, and a controller. The anti - overturning bracket is fixedly arranged on the airdrop cargo platform. The constant - force electric cable - retracting mechanism and the height and horizontal measurement module are arranged on the anti - overturning bracket. The constant - force electric cable - retracting mechanism is connected to the ground anchor through a directional anti - overturning connecting rope. The height and horizontal measurement module and the constant - force electric cable - retracting mechanism are respectively connected to the controller.

[0011] According to the above - mentioned technical solution, the constant - force electric cable - retracting mechanism includes a motor, a cable - retracting disc, and a locking mechanism. The cable - retracting disc is sleeved on the output shaft of the motor. The locking mechanism is arranged on one side of the cable - retracting disc. One end of the directional anti - overturning connecting rope is wound around the cable - retracting disc, and the other end of the directional anti - overturning connecting rope is connected to the ground anchor. The motor drives the cable - retracting disc to rotate, thereby retracting and releasing the directional anti - overturning connecting rope to change the distance between the airdrop cargo platform and the ground anchor. The locking mechanism is used to lock the cable - retracting disc to prevent it from rotating.

[0012] According to the above - mentioned technical solution, a motor base is also connected between the motor and the anti - overturning bracket. The motor is fixedly arranged on the anti - overturning bracket through the motor base. The motor base has an inner cavity. The cable - retracting disc is sleeved in the inner cavity of the motor base to form a protective effect. The locking mechanism is arranged on the motor base.

[0013] According to the above - mentioned technical solution, a torque limiter is connected between the output shaft of the motor and the cable - retracting disc.

[0014] According to the above - mentioned technical solution, the locking mechanism includes a ratchet wheel, a pawl, and a driving mechanism. The ratchet wheel is arranged on the outer ring of the cable - retracting disc. The pawl is arranged on one side of the ratchet wheel. The driving mechanism is connected to the pawl. The controller is connected to the driving mechanism. The controller drives the pawl to act through the driving mechanism to lock and brake or unlock the ratchet wheel.

[0015] According to the above - mentioned technical solution, the driving mechanism includes a reset pull rod and an electromagnetic suction device. The reset pull rod is connected to the pawl. The electromagnetic suction device is arranged on one side of the reset pull rod. The controller is connected to the electromagnetic suction device. The controller controls the electromagnetic suction device to be powered on or off, thereby sucking the reset pull rod to make the pawl act.

[0016] According to the above technical solution, the locking mechanism further includes a tension spring and a tension spring seat. The pawl is arranged on the motor base through a rotating shaft and can rotate around the rotating shaft. One end of the pawl is hinged to the lower end of the reset pull rod, and the other end of the pawl is connected to the tension spring seat through the tension spring. The tension spring seat is fixedly arranged on the motor base. The electromagnetic suction device is arranged on one side of the reset pull rod. When the electromagnetic suction device does not suck the reset pull rod, the tension spring drives the pawl to reset, so that the pawl is disengaged from the ratchet wheel.

[0017] According to the above technical solution, the height and horizontal measurement module includes a satellite positioning module, an electronic compass and a millimeter wave radar. The satellite positioning module, the electronic compass and the millimeter wave radar are respectively connected to the controller; the satellite positioning module, the electronic compass and the millimeter wave radar are fixedly arranged on the anti-overturning bracket. The controller measures the relative height of the airdropping equipment from the ground through the millimeter wave radar, measures the horizontal movement direction of the equipment through the satellite positioning module, and measures the included angle between the long axis of the equipment and the true north through the electronic compass and calculates the angular velocity of the rotation of the long axis of the equipment at the same time.

[0018] According to the above technical solution, a driver is connected between the controller and the locking mechanism and the motor.

[0019] The present invention has the following beneficial effects:

[0020] The airdropping system landing anti-overturning device of the present invention has a simple structure, is convenient to use, has good adaptability, and has a low cost. It is suitable for the airdropping landing of heavy equipment and valuable equipment, can reduce the damage probability of the equipment, and improve the airdropping efficiency. Description of the Drawings

[0021] Figure 1 is the elevation view of the airdropping system landing anti-overturning device in the embodiment of the present invention;

[0022] Figure 2 is the front view of the airdropping system landing anti-overturning device in the embodiment of the present invention;

[0023] Figure 3 is Figure 2 the A-A cross-sectional view of

[0024] Figure 4 is the electrical control schematic diagram of the airdropping system landing anti-overturning device in the embodiment of the present invention;

[0025] In the figure, 1 - motor, 2 - torque limiter, 3 - motor base, 4 - winch drum, 5 - ratchet wheel, 6 - motor bushing, 7 - tension spring seat, 8 - tension spring, 9 - pawl, 10 - reset pull rod. Detailed Embodiment

[0026] The present invention will be described in detail below with reference to the drawings and embodiments.

[0027] Refer to Figures 1 to 4As shown in the figure, an anti-overturning device for an airdrop system landing in an embodiment provided by the present invention includes an anti-overturning bracket, a height and horizontal measurement module, a constant-force electric cable-receiving mechanism, a ground anchor, and a controller. The anti-overturning bracket is fixedly arranged on the airdrop cargo platform. The constant-force electric cable-receiving mechanism and the height and horizontal measurement module are arranged on the anti-overturning bracket. The constant-force electric cable-receiving mechanism is connected to the ground anchor through a directional anti-overturning connecting rope. The height and horizontal measurement module and the constant-force electric cable-receiving mechanism are respectively connected to the controller.

[0028] Further, the constant-force electric cable-receiving mechanism includes a motor 1, a cable-receiving disc 4, and a locking mechanism. The cable-receiving disc 4 is sleeved on the output shaft of the motor 1. The locking mechanism is arranged on one side of the cable-receiving disc 4. One end of the directional anti-overturning connecting rope is wound around the cable-receiving disc 4, and the other end of the directional anti-overturning connecting rope is connected to the ground anchor. The motor 1 drives the cable-receiving disc 4 to rotate, thereby taking in and paying out the directional anti-overturning connecting rope and changing the distance between the airdrop cargo platform and the ground anchor. The locking mechanism is used to lock the cable-receiving disc 4 to prevent the cable-receiving disc 4 from rotating. The constant-force electric cable-receiving mechanism can automatically tighten the directional anti-overturning connecting rope unidirectionally and stop the directional anti-overturning connecting rope after reaching the specified torque, avoiding the drawback of burning out the motor 1. The structure is simple and convenient to control.

[0029] Further, the directional anti-overturning connecting rope includes a steel cable.

[0030] Further, a motor base 3 is also connected between the motor 1 and the anti-overturning bracket. The motor 1 is fixedly arranged on the anti-overturning bracket through the motor base 3. The motor base 3 has an inner cavity. The cable-receiving disc 4 is sleeved in the inner cavity of the motor base 3 to form a protective effect. The locking mechanism is arranged on the motor base 3.

[0031] Further, a torque limiter 2 is connected between the output shaft of the motor 1 and the cable-receiving disc 4.

[0032] Further, the locking mechanism includes a ratchet wheel 5, a pawl 9, and a driving mechanism. The ratchet wheel 5 is arranged on the outer ring of the cable-receiving disc 4. The pawl 9 is arranged on one side of the ratchet wheel 5. The driving mechanism is connected to the pawl 9. The controller is connected to the driving mechanism. The controller drives the pawl 9 to act through the driving mechanism to form a locking brake or unlocking of the ratchet wheel 5.

[0033] Further, the driving mechanism includes a reset pull rod 10 and an electromagnetic suction device. The reset pull rod 10 is connected to the pawl 9. The electromagnetic suction device is arranged on one side of the reset pull rod 10. The controller is connected to the electromagnetic suction device. The controller controls the electromagnetic suction device to be powered on or off, thereby sucking the reset pull rod 10 to make the pawl 9 act.

[0034] Further, the locking mechanism further includes a tension spring 8 and a tension spring seat 7. The pawl 9 is arranged on the motor base 3 through a rotating shaft and can rotate around the rotating shaft. One end of the pawl 9 is hinged to the lower end of the reset pull rod 10, and the other end of the pawl 9 is connected to the tension spring seat 7 through the tension spring 8. The tension spring seat 7 is fixedly arranged on the motor base 3. The electromagnetic sucker is arranged on one side of the reset pull rod 10. When the electromagnetic sucker does not suck the reset pull rod 10, the tension spring 8 drives the pawl 9 to reset, so that the pawl 9 is disengaged from the ratchet wheel 5.

[0035] Further, the height and horizontal measurement module includes a satellite positioning module, an electronic compass, and a millimeter-wave radar. The satellite positioning module, the electronic compass, and the millimeter-wave radar are respectively connected to the controller; the satellite positioning module, the electronic compass, and the millimeter-wave radar are fixedly arranged on the anti-overturning bracket. The controller measures the relative height of the airdrop equipment from the ground through the millimeter-wave radar, measures the horizontal movement direction of the equipment through the satellite positioning module, measures the included angle between the long axis of the equipment and the due north through the electronic compass, and calculates the angular velocity of the rotation of the long axis of the equipment at the same time.

[0036] Further, the output shaft of the motor 1 is connected to the cable reel 4 through a motor shaft sleeve 6.

[0037] Further, a driver is connected between the controller and the locking mechanism and the motor 1.

[0038] The working principle of the present invention:

[0039] To solve the problems such as the spin of heavy equipment during the landing stage and the failure of the existing anti-overturning technology under specific wind speeds, a new type of anti-overturning device with strong adaptability and high reliability, which can help the airdrop system to adjust its attitude, is invented. The anti-overturning device measures the relative height of the equipment from the ground by using a millimeter-wave radar, measures the horizontal movement direction of the equipment by using a satellite positioning module, measures the included angle between the long axis of the equipment and the due north by using an electronic compass, and calculates the angular velocity of the rotation of the long axis of the equipment at the same time. When the equipment descends to the set height, according to the classification of the angular velocity and the included angle between the long axis of the equipment and the horizontal movement direction of the equipment, the locking mechanism on the turntable of the motor 1 is opened, the motor 1 is started to reverse, the steel cable is released, and the ground anchor connected to the end of the steel cable falls under the action of gravity; after the ground anchor lands, the locking mechanism on the turntable of the motor 1 is closed (at this time, only the forward rotation of the motor 1 is allowed), the motor 1 is started to rotate forward, the slack steel cable is tightened, and the ground anchor drags behind the equipment along the long axis direction of the equipment during the process of the equipment flying forward with the wind, so as to ensure that the long axis direction of the equipment itself is basically coincident with the flying direction of the equipment during landing, and improve the anti-overturning performance of the airdrop equipment during landing.

[0040] An anti-overturning device for an airdrop system landing uses a millimeter-wave radar to measure the relative height of the airdrop equipment from the ground, a satellite positioning module to measure the horizontal movement direction of the equipment, and an electronic compass to measure the angle between the long axis of the equipment and the due north while calculating the angular velocity of the rotation of the long axis of the equipment. When the equipment descends to the set height, the controller controls the driver to open the locking mechanism on the turntable of Motor 1 according to the classification of the angular velocity and the angle between the long axis of the equipment and the horizontal movement direction of the equipment, starts Motor 1 to reverse, releases the steel cable, and the ground anchor connected to the end of the steel cable falls under the action of gravity; when the ground anchor lands, the locking mechanism on the turntable of Motor 1 is closed (at this time, only forward rotation of Motor 1 is allowed), starts Motor 1 to rotate forward, tightens the slack steel cable, and the ground anchor drags behind the equipment along the direction of its own long axis during the process of the equipment flying forward with the wind, so as to ensure that the long axis direction of the equipment itself is basically coincident with the flying direction of the equipment during landing, and improve the anti-overturning performance of the airdrop equipment during landing.

[0041] The satellite positioning module, the electronic compass, and the millimeter-wave radar all adopt mature modules. The satellite positioning module can be a single GPS, single Beidou, single GLONASS positioning mode or any combination thereof. The electronic compass can adopt a three-dimensional magnetoresistive sensor, and the millimeter-wave radar can adopt a radio wave radar sensor in the 77GHz frequency band. They all communicate with the controller through RS232 interfaces. There are two-way drives in the driver. One is an "H" bridge drive circuit for driving the forward and reverse rotation of DC brush motor 1; the other is a switch drive circuit for driving the electromagnet of the locking mechanism to attract and release, thereby driving the locking mechanism to close (only forward rotation of Motor 1 is allowed) and lift (Motor 1 can rotate forward or reverse). The controller and the driver are controlled by level signals. Motor 1 consists of a motor body, a reducer, and a torque limiter. The torque limiter is connected to the turntable. There is a groove for winding the steel cable on the inner side of the turntable, and a gear with an arc on the outer side of the turntable. The locking mechanism is connected to the gear on the outer side of the turntable (as Figure 2 shown); when the locking mechanism is lifted, Motor 1 can rotate forward and reverse. When the locking mechanism is closed, Motor 1 can only rotate forward. At the same time, when Motor 1 rotates forward, if the external dragging force is too large, the motor body and the reducer will keep rotating forward, while the torque limiter and the turntable will remain stationary to protect Motor 1 from being blocked and burned out. Motor 1 tightens or releases the steel cable by rotating the turntable forward or backward. The end of the 200m steel cable is connected to a 55Kg three-claw ground anchor.

[0042] The controller obtains the altitude information h and the heading information (the angle between the airdrop equipment and the north direction) α of the satellite positioning module. The controller obtains the direction β (the angle with the true north direction) of the long axis of the airdrop equipment through an electronic compass and calculates the angular velocity υ of the rotation of the long axis of the airdrop equipment according to the change of the direction. The controller can know the angle θ between the heading of the airdrop equipment and the direction of the long axis of the airdrop equipment based on α and β. The controller obtains the relative altitude information Δh of the airdrop equipment with respect to the ground through a millimeter-wave radar. The controller monitors the relative altitude information Δh in real time (while monitoring the altitude information h measured by the satellite positioning module). When Δh, υ, and θ meet the conditions of "A Method for Preventing Overturning during Landing of an Airdrop System", the controller drives the switch drive circuit of the actuator to lift the locking mechanism, and at the same time drives the motor 1 to reverse through the "H" bridge drive circuit to release the steel cable; the controller calculates the landing time of the airdrop equipment according to "A Method for Preventing Overturning during Landing of an Airdrop System". When the landing time arrives, the controller stops driving the "H" bridge drive circuit to make the motor 1 stop reversing, and then closes the locking mechanism through the switch drive circuit of the actuator. Finally, it drives the "H" bridge drive circuit to make the motor 1 start to rotate forward to tighten the steel cable, ultimately ensuring that the ground anchor drags behind the airdrop equipment along the long axis direction of the equipment itself during the forward flight with the wind, so as to ensure that the long axis direction of the airdrop equipment itself is basically coincident with the flight direction of the airdrop equipment during landing, thereby improving the anti-overturning performance of the airdrop equipment during landing.

[0043] The working process of the present invention includes the following steps:

[0044] 1) Release the ground anchor connected to the airdrop platform in the air as appropriate. The platform is connected to the ground anchor through a steel cable;

[0045] 2) After the ground anchor lands, start to tighten the slack steel cable until the platform descends to the ground;

[0046] 3) Drag the goods or the platform through the friction between the ground anchor and the ground, so that the long axis direction of the platform is opposite to the flight direction of the platform.

[0047] Furthermore, a constant-force electric cable-receiving mechanism is provided on the airdrop platform. The constant-force electric cable-receiving mechanism is connected to the ground anchor through a steel cable;

[0048] The constant-force electric cable-receiving mechanism includes a motor 1, a winch, and a locking mechanism. The winch is sleeved on the output shaft of the motor 1. The locking mechanism is arranged on one side of the winch. One end of the steel cable is wound around the winch, and the other end of the steel cable is connected to the ground anchor.

[0049] Furthermore, in step 1), the specific process of releasing the ground anchor in the air refers to:

[0050] a) When the airdrop platform descends to a height H from the ground, immediately release the ground anchor;

[0051] b) Start the motor 1 to rotate counterclockwise to release the steel cable on the winch. The release time Where V 电机 is the speed at which the motor 1 rotates to release the steel cable, and V 降落伞垂直落速 is the vertical falling speed of the parachute;

[0052] c) After the release time expires, the motor 1 stops rotating counterclockwise, and the locking mechanism is activated to lock the winch and prevent the winch from rotating counterclockwise.

[0053] Further, in the step 2), the specific process of tightening the slack steel cable until the cargo platform lands on the ground is as follows: Start the motor 1 to rotate clockwise, and tighten the slack steel cable of the airdropped cargo platform during the falling process through the winch until the cargo platform lands on the ground, and then the motor 1 stops rotating.

[0054] Further, in the step a),

[0055] When ω counterclockwise α > β, and 45° < α - β < 270°,

[0056] Then Release the ground anchor;

[0057] When ω counterclockwise β > α, and 90° < β - α < 315°,

[0058] Then Release the ground anchor;

[0059] When ω clockwise β > α, and 45° < β - α < 270°,

[0060] Then Release the ground anchor;

[0061] When ω clockwise α > β, and 90° < α - β < 315°,

[0062] Then Release the ground anchor;

[0063] When ω = 0, and 60° < |α - β| < 300°, H < 320, release the ground anchor;

[0064] When H < 80, immediately release the ground anchor. In the above formulas, ω is the angular velocity of the rotation of the long axis of the airdropped cargo platform, α is the horizontal movement direction of the airdropped cargo platform, β is the angle between the long axis of the airdropped cargo platform and the true north, and V 电机 is the speed at which the motor rotates to release the steel cable, and V 降落伞垂直落速 is the vertical falling speed of the parachute.

[0065] The above are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the protection scope of the present invention.

Claims

1. An anti-overturning device for an airdrop system during landing, characterized in that, it includes an anti-overturning bracket, a height and horizontal measurement module, a constant-force electric cable-receiving mechanism, a ground anchor and a controller. The anti-overturning bracket is fixedly arranged on the airdrop cargo platform. The constant-force electric cable-receiving mechanism and the height and horizontal measurement module are arranged on the anti-overturning bracket. The constant-force electric cable-receiving mechanism is connected to the ground anchor through a directional anti-overturning connecting rope. The height and horizontal measurement module and the constant-force electric cable-receiving mechanism are respectively connected to the controller; The constant-force electric cable-receiving mechanism includes a motor, a cable-receiving disc and a locking mechanism. The cable-receiving disc is sleeved on the output shaft of the motor. The locking mechanism is arranged on one side of the cable-receiving disc. One end of the directional anti-overturning connecting rope is wound around the cable-receiving disc, and the other end of the directional anti-overturning connecting rope is connected to the ground anchor; The height and horizontal measurement module includes a satellite positioning module, an electronic compass and a millimeter-wave radar. The satellite positioning module, the electronic compass and the millimeter-wave radar are respectively connected to the controller; The relative height of the airdrop equipment from the ground is measured by using the millimeter-wave radar. The horizontal movement direction of the equipment is measured by using the satellite positioning module. The included angle between the long axis of the equipment and the due north is measured by using the electronic compass, and the angular velocity of the rotation of the long axis of the equipment is calculated at the same time. When the equipment descends to the set height, the controller controls the driving mechanism to open the locking mechanism on one side of the cable-receiving disc according to the classification of the angular velocity and the included angle between the long axis of the equipment and the horizontal movement direction of the equipment, starts the motor to reverse, releases the directional anti-overturning connecting rope, and the ground anchor connected to the end of the directional anti-overturning connecting rope falls under the action of gravity; after the ground anchor lands, the locking mechanism on one side of the cable-receiving disc is closed, the motor is started to rotate forward, the slack directional anti-overturning connecting rope is tightened, and the ground anchor drags behind along the long axis direction of the equipment during the process of the equipment flying forward with the wind, so as to ensure that the long axis direction of the equipment is basically coincident with the flying direction of the equipment during landing and improve the anti-overturning performance of the airdrop equipment during landing.

2. The anti-overturning device for an airdrop system during landing according to claim 1, characterized in that, a motor base is further connected between the motor and the anti-overturning bracket. The motor base is provided with an inner cavity. The cable-receiving disc is sleeved in the inner cavity of the motor base, and the locking mechanism is arranged on the motor base.

3. The anti-overturning device for an airdrop system during landing according to claim 1, characterized in that, a torque limiter is connected between the output shaft of the motor and the cable-receiving disc.

4. The anti-overturning device for an airdrop system during landing according to claim 1, characterized in that, the locking mechanism includes a ratchet wheel, a pawl and a driving mechanism. The ratchet wheel is arranged on the outer ring of the cable-receiving disc. The pawl is arranged on one side of the ratchet wheel. The driving mechanism is connected to the pawl. The controller is connected to the driving mechanism. The controller drives the pawl to act through the driving mechanism to form a locking brake or unlocking on the ratchet wheel.

5. The anti-overturning device for an airdrop system during landing according to claim 4, characterized in that, the driving mechanism includes a reset pull rod and an electromagnetic suction cup. The reset pull rod is connected to the pawl. The electromagnetic suction cup is arranged on one side of the reset pull rod. The controller is connected to the electromagnetic suction cup. The controller controls the electromagnetic suction cup to be energized or de-energized, so as to suck and reset the pull rod to make the pawl act.

6. The anti-overturning device for an airdrop system during landing according to claim 5, characterized in that, The locking mechanism further includes a tension spring and a tension spring seat. The pawl is arranged on the motor base through a rotating shaft and can rotate around the rotating shaft. One end of the pawl is hinged to the lower end of the reset pull rod, and the other end of the pawl is connected to the tension spring seat through the tension spring. The tension spring seat is fixedly arranged on the motor base. When the electromagnetic attractor does not attract the reset pull rod, the tension spring drives the pawl to reset, so that the pawl is disengaged from the ratchet wheel.

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