Electromagnetic type hook putting and recycling device

Abstract

The utility model discloses an electromagnetic type hook putting and recycling device. The problem that a helicopter or an unmanned aerial vehicle cannot be automatically unhooked when materials are put is effectively solved. Which comprises a shell, a hanging ring arranged at the top of the shell, a sling fixedly connected with the hanging ring and a control line arranged on the sling, and is characterized in that a bearing is fixedly connected between the hanging ring and the shell, an upper cover plate located above the bearing is fixedly connected to the shell, and a bearing seat abutting against the bearing is connected to the hanging ring in a threaded mode; the automatic unhooking device is ingenious in structure and convenient to use, through the arrangement of the limiting pin, the electromagnet, the unhooking rocker arm and the like, after the unmanned aerial vehicle arrives at a designated area, the electromagnet is electrified to attract the push rod to approach the electromagnet, then the upper swing arm is separated from the limiting pin for limiting, suspended materials are separated from the hook at the moment, and the automatic unhooking effect is achieved; materials do not need to completely fall on the ground for manual unhooking.

Description

Technical Field

[0001] The utility model relates to the technical field of airborne transport delivery, in particular to an electromagnetic hook delivery and recovery device. Background Art

[0002] When supplies need to be delivered during military exercises and disaster relief operations, helicopters or drones are often used to deliver supplies. A common method is to set a hook under the fuselage, hang the supplies under the hook, and then rotate the winch to slowly move the hook down until the supplies fall to the ground. At this time, ground personnel need to manually remove the hook, start the winch to retract the hook, and then the helicopter or drone will fly away from the delivery area.

[0003] The Chinese patent with the authorization announcement number CN215043739U discloses a cargo hook for a dual-rotor unmanned helicopter, including a mounting plate, a helicopter body is arranged on the top of the mounting plate, landing gears are fixedly installed on both sides of the bottom of the mounting plate, an inner cavity is formed inside the mounting plate, a winding machine is fixedly installed on the inner bottom wall of the inner cavity, a reel is fixedly installed on the end of the output shaft of the reel, and a reel is wound on the outer wall of the reel. The plunger is driven to move downward gradually through the connecting rod. Since the air between the plunger and the piston is quantitative, the gradual downward movement of the plunger will push the piston to move in the arc cavity. The movement of the piston in the arc cavity causes the arc rod to gradually extend from the arc cavity and cross the notch of the hook. At this time, the items hanging on the hook cannot be detached from the hook, and the transportation is safer and more stable.

[0004] A Chinese patent with authorization announcement number CN213109793U discloses an airborne hook for a drone and a drone throwing device, a remote control device, a base and a hook, wherein the hook sequentially includes a stop section, a rotating section and a hook section for hanging objects, and the hook is rotatably connected to the base through the rotating section; a motor and a slider are installed in the base, and the motor is connected to the slider to drive it to contact or move away from the stop section; the motor is controlled by the remote control device to rotate the upward free end of the hook to face downward, so that the object mounted on the hook can automatically slide off the hook, effectively avoiding the safety risk of the drone being increased by applying a downward pulling force to the hook when people take objects from the hook.

[0005] However, the existing airborne hooks still have the following problems:

[0006] 1. After the materials are dropped on the ground, the hook needs to be manually detached from the materials. In some emergency scenarios, it is not suitable to release it manually. Some people also cut the rope directly, but the cost of using this method is too high and it is not suitable for a single helicopter to drop materials back and forth.

[0007] 2. When the space in the transport cabin is relatively small, it is often necessary to use a single hook to drop materials. During the descent, the materials will drive the hook to rotate under the action of external force. When the rope contains cables, as the number of rotations increases, the circuit connection line and the nylon bearing part of the bearing cable are easily entangled, greatly affecting the service life of the bearing cable. However, the use of wireless control not only has high equipment costs, but the connection signal of wireless transmission is easily affected by the external environment, resulting in signal instability. Utility Model Content

[0008] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide an electromagnetic hook delivery and recovery device, which effectively solves the problems mentioned in the background technology.

[0009] The technical solution is that the utility model comprises a housing, a lifting ring placed on the top of the housing, a lifting rope fixedly connected to the lifting ring, and a control line placed on the lifting rope, and is characterized in that a bearing is fixedly connected between the lifting ring and the housing, an upper cover plate located above the bearing is fixedly connected to the housing, and a bearing seat abutting against the bearing is threadedly connected to the lifting ring;

[0010] An "L"-shaped support plate is fixedly connected to one side of the shell, an electromagnet is fixedly connected to the support plate, a push rod penetrating the shell is slidably connected to one side of the electromagnet, an end of the push rod away from the electromagnet is fixedly connected to a limit pin, a through slot is provided at the bottom of the shell, a connecting shaft penetrating the shell and the through slot is fixed to the bottom of the shell, a "C"-shaped hook-opening rocker arm is rotatably connected to the connecting shaft, the hook-opening rocker arm is divided into a longer upper swing arm and a shorter lower swing arm, one end of the upper swing arm is overlapped on the limit pin, and a lower buckle rocker arm located on both sides of the hook-opening rocker arm is rotatably connected to the connecting shaft, a mounting area is formed between the hook-opening rocker arm and the lower buckle rocker arm, the two lower buckle rocker arms are fixed with the same connecting plate at one end away from the mounting area, a lower buckle torsion spring is fixed to one end of the connecting shaft, one end of the lower buckle torsion spring is fixed to the shell, and the other end of the torsion spring is against the bottom of the connecting plate.

[0011] Preferably, a transfer rocker arm is rotatably connected to a side of the shell away from the electromagnet, a microswitch located above the transfer rocker arm is fixed in the shell, an elastic paddle is fixed below the microswitch, a contact abutting against the elastic paddle is provided at the bottom of the microswitch, one end of the elastic paddle is rotatably connected to a roller in contact with the transfer rocker arm, an arc-shaped hole is provided on the transfer rocker arm, a pin shaft passing through the arc-shaped hole is fixed inside the shell, a slider is slidably connected to the pin shaft, the slider is connected to the pin shaft by a spring, the slider is in contact with the transfer rocker arm, and limit blocks abutting against each other are respectively fixed at the rotation points of the hook-opening rocker arm and the transfer rocker arm.

[0012] Preferably, a cavity is opened in the lifting ring, and a mounting plate is fixedly connected to the bottom of the lifting ring. An electric slip ring located inside the cavity is coaxially fixed on the mounting plate. The connecting wires at the lower end of the electric slip ring are respectively connected to the electromagnet and the micro switch, and the connecting wires at the upper end of the electric slip ring pass through the shell and are connected to the control wire.

[0013] Preferably, a downward-compression torsion spring is arranged at one end of the connecting shaft away from the downward-compression torsion spring, one end of the downward-compression torsion spring is fixed to the housing, and the other end of the downward-compression torsion spring is abutted against the top of the upper swing arm.

[0014] Preferably, a switch box is sleeved on the micro switch, an arc-shaped groove is opened on the shell and is located on one side of the switch box, one end of the switch box is rotatably connected to the shell, the other end of the switch box is connected to the arc-shaped groove by a bolt, a stud is threadedly connected to the top of the shell, and one end of the stud passes through the shell and abuts against one side of the top of the switch box.

[0015] Preferably, the push rod is connected to the support plate via a spring, waist-shaped rings located on both sides of the through slot are fixed on the shell, both ends of the limit pin slide inside the corresponding waist-shaped rings respectively, and an inclined block is fixed on the end of the upper swing arm that contacts the limit pin.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. Through the settings of limit pins, electromagnets and hook-opening rocker arms, when the drone reaches the designated area, the electromagnet is energized to attract the push rod to move closer to the electromagnet, and then the upper swing arm and the limit pin are separated from the limit position. At this time, the suspended materials are separated from the hook, achieving the effect of automatic unhooking, without having to drop the materials completely to the ground for manual unhooking.

[0018] 2. Through the settings of bearings, electric slip rings and upper cover plates, when the object mounted under the shell rotates due to the influence of external force, the lifting ring does not rotate with the shell, avoiding entanglement between the control line and the lifting cable and between the electric slip ring connecting lines. Compared with the wireless control method, the wired control transmission signal is more stable, and at the same time, it avoids the entanglement between the control line and the lifting cable in the wired system and the entanglement of the control line inside the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a stereogram of the utility model.

[0020] Figure 2 It is a cross-sectional view of the utility model.

[0021] Figure 3 The utility model is a schematic diagram of assembling the hook rocker arm and the buckle rocker arm.

[0022] Figure 4It is a structural schematic diagram of the lower buckle torsion spring in the utility model.

[0023] Figure 5 It is a structural schematic diagram of the transfer rocker arm in the utility model.

[0024] Figure 6 It is a structural schematic diagram of the downward compression torsion spring in the utility model.

[0025] Figure 7 This utility model Figure 2 A schematic diagram of the enlarged structure at point A in the middle.

[0026] Explanation of the symbols in the schematic diagram:

[0027] 10. Shell; 101. Through slot; 102. Connecting shaft; 103. Pin; 104. Sliding block; 105. Mounting plate; 106. Arc slot; 107. Waist ring; 11. Bearing; 12. Upper cover; 13. Bearing seat; 14. Support plate; 20. Lifting ring; 201. Cavity; 30. Lifting rope; 40. Electromagnet; 41. Push rod; 42. Limit pin; 50. Open hook Arm; 501, upper swing arm; 5011, inclined block; 502, lower swing arm; 51, lower buckle rocker arm; 511, connecting plate; 52, lower buckle torsion spring; 53, lower pressure torsion spring; 60, transfer rocker arm; 601, arc hole; 70, micro switch; 701, contact; 71, elastic paddle; 711, roller; 72, switch box; 73, stud; 80, limit block; 90, electric slip ring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Depend on Figures 1 to 4 The invention provides a housing 10, a lifting ring 20 placed on the top of the housing 10, a sling 30 fixedly connected to the lifting ring 20, and a control line placed on the sling 30, wherein the end of the sling 30 away from the lifting ring 20 can be directly connected to a winch in a drone pod, and the control line can be connected to a control panel in the drone, a bearing 11 is fixedly connected between the lifting ring 20 and the housing 10, an upper cover plate 12 located above the bearing 11 is fixedly connected to the housing 10, and a bearing seat 13 abutting against the bearing 11 is threadedly connected to the lifting ring 20;

[0030] In order to facilitate the automatic unhooking of the drone during hovering, a support plate 14 is fixedly connected to one side of the shell 10, and an electromagnet 40 is fixedly connected to the support plate 14. A push rod 41 that passes through the shell 10 is slidably connected to one side of the electromagnet 40. The end of the push rod 41 away from the electromagnet 40 is fixedly connected to a limiting pin 42. A through slot 101 is provided at the bottom of the shell 10. A connecting shaft 102 that passes through the shell 10 and the through slot 101 is fixed to the bottom of the shell 10. The connecting shaft 10 2 is rotatably connected with a "C"-shaped hook-opening rocker arm 50, the hook-opening rocker arm 50 is divided into a longer upper swing arm 501 and a shorter lower swing arm 502, one end of the upper swing arm 501 is overlapped on the limit pin 42, and the connecting shaft 102 is rotatably connected with lower buckle rocker arms 51 located on both sides of the hook-opening rocker arm 50, the lower buckle rocker arm 51 includes a lower buckle claw that cooperates with the hook-opening rocker arm 50, and a mounting area is formed between the hook-opening rocker arm 50 and the lower buckle rocker arm 51, and the hoisted materials are placed in the mounting area. The same connecting plate 511 is fixed to the end of the arm 51 away from the mounting area, and both ends of the connecting plate 511 are in contact with the shell 10. A buckling torsion spring 52 is fixed to one end of the connecting shaft 102. It should be noted that when the buckling torsion spring 52 drives the connecting plate 511 to buckle the buckling rocker arm 51 downward, when the two ends of the connecting plate 511 are against the shell 10, it means that the buckling rocker arm 51 reaches the maximum buckling state. By setting the buckling torsion spring 52, the buckling strength of the buckling rocker arm 51 and the hook opening rocker arm 50 is strengthened to avoid To prevent materials from falling off, one end of the lower torsion spring 52 is fixed to the shell 10, and the other end of the torsion spring is against the bottom of the connecting plate 511. Through the limit pin 42, the electromagnet 40 and the hook-opening rocker arm 50, when the UAV reaches the designated area, the electromagnet 40 is energized to attract the push rod 41 to move closer to the electromagnet 40, and then the upper swing arm 501 is disengaged from the limit pin 42. At this time, the suspended materials are disengaged from the hook, achieving the effect of automatic unhooking, and there is no need to drop the materials completely to the ground for manual unhooking.

[0031] refer to Figure 2 and Figure 5As shown, considering that the hook needs to be checked at all times during actual use, a transfer rocker arm 60 is rotatably connected to the side of the shell 10 away from the electromagnet 40, and a micro switch 70 located above the transfer rocker arm 60 is fixed inside the shell 10 for feeding back the unhooking status of the hook to the control panel, and an elastic paddle 71 is fixed below the micro switch 70, and a contact 701 abutting against the elastic paddle 71 is provided at the bottom of the micro switch 70. It should be noted that when the contact 701 is compressed, the micro switch 70 is in a power-off state, and when the contact 701 is released from the compressed state, the micro switch 70 sends an unhooking signal to the control panel, and the unhooking signal is displayed in a digital display or an indicator light, and one end of the elastic paddle 71 is rotatably connected to a roller 711 in contact with the transfer rocker arm 60, and an arc hole 601 is provided on the transfer rocker arm 60, and a pin penetrating the arc hole 601 is fixed inside the shell 10 The shaft 103 is slidably connected with a slider 104 on the pin shaft 103, and the slider 104 is connected to the pin shaft 103 by a spring. The slider 104 contacts the transfer rocker arm 60. Through the setting of the arc hole 601, the transfer rocker arm 60 can rotate clockwise at a certain angle under the support of the slider 104. The rotation positions of the unhooking rocker arm 50 and the transfer rocker arm 60 are respectively fixed with limit blocks 80 that abut against each other. Through the settings of the transfer rocker arm 60, the micro switch 70 and the elastic paddle 71, when the unhooking rocker arm 50 is disengaged from the lower buckle rocker arm 51, the upper swing arm 501 swinging downward is disengaged from the limit of the transfer rocker arm 60, and the transfer rocker arm 60 rotates clockwise under the action of the slider 104. At this time, the transfer rocker arm 60 drives the elastic paddle 71 to no longer compress the contact 701, and the control panel inside the drone or helicopter receives the unhooking signal sent by the micro switch 70, which is convenient for the user to observe the unhooking state of the hook at all times.

[0032] refer to Figure 2 As shown, considering that when the UAV is suspended to drop supplies, the hoisted object will rotate under the influence of external force, and at this time there is a problem of entanglement between the control line and the sling 30 and power failure, a cavity 201 is opened in the lifting ring 20, and a mounting plate 105 is fixedly connected to the bottom of the lifting ring 20, and an electric slip ring 90 located inside the cavity 201 is coaxially fixed on the mounting plate 105. The connecting wires at the lower end of the electric slip ring 90 are respectively connected to the electromagnet 40 and the micro switch 70, and the connecting wires at the upper end of the electric slip ring 90 are connected to the control wire. Through the bearing 11, the electric slip ring 90 and the upper cover plate 12, when the object mounted below the shell 10 is rotated after being affected by external force, the lifting ring 20 does not rotate with the shell 10, so as to avoid entanglement between the control wire and the sling 30 and between the connecting wires of the electric slip ring 90.

[0033] refer to Figure 6As shown, in order to strengthen the downward swing force of the hook-opening rocker arm 50 and avoid the accidental stay of materials in the mounting area, a downward pressure torsion spring 53 is provided at one end of the connecting shaft 102 away from the downward buckle torsion spring 52, one end of the downward pressure torsion spring 53 is fixed to the shell 10, and the other end of the downward pressure torsion spring 53 is against the top of the upper swing arm 501.

[0034] refer to Figure 7 As shown, considering the problem that the compression depth of the contact 701 is insufficient or the contact 701 does not completely reach the free state during the actual assembly of the micro switch 70, a switch box 72 is sleeved on the micro switch 70, and an arc groove 106 is opened on the shell 10 on one side of the switch box 72, one end of the switch box 72 is rotatably connected to the shell 10, and the other end of the switch box 72 is connected to the arc groove 106 by a bolt, and a stud 73 is threadedly connected to the top of the shell 10, and one end of the stud 73 penetrates the shell 10 and abuts against the top side of the switch box 72. Through the switch box 72, the arc groove 106 and the stud 73, when the hook is assembled, when the worker finds that the signal sent by the micro switch 70 is not accurate, the bolt of the switch box 72 at one end of the arc groove 106 is first loosened, and then the stud 73 is controlled to be adjusted up and down, so as to adjust the position of the micro switch 70 to avoid the micro switch 70 sending an erroneous signal.

[0035] refer to Figures 1 to 3 As shown, in order to facilitate the re-mounting of materials, the push rod 41 is connected to the support plate 14 by a spring, and waist-shaped rings 107 located on both sides of the through groove 101 are fixed on the shell 10 to limit the moving stroke of the limit pin 42. The two ends of the limit pin 42 slide inside the corresponding waist-shaped rings 107 respectively, and the end of the upper swing arm 501 that contacts the limit pin 42 is fixed with an inclined block 5011. It should be noted that in this embodiment, the inclined block 5011 is a right triangle, the right-angled side of the triangle is in contact with the limit pin 42, and the hypotenuse of the triangle is used to squeeze the limit pin 42 to one side when resetting.

[0036] The utility model is in use:

[0037] When the hook is released, the electromagnet 40 is powered on by the control panel or other control components provided in the machine body, and the push rod 41 is attracted by the magnetic force and moves toward the side of the electromagnet 40, so that the limit pin 42 is disengaged from the upper swing arm 501, and the unhooking rocker arm 50 is disengaged from the lower buckling rocker arm 51, and the materials fall downwards;

[0038] At the same time, as the unhooking rocker arm 50 swings downward, the unhooking rocker arm 50 no longer limits the transfer rocker arm 60, and the transfer rocker arm 60 rotates clockwise under the action of the slider 104. At this time, the transfer rocker arm 60 drives the elastic paddle 71 to no longer compress the contact 701, and the control panel inside the drone or helicopter receives the unhooking signal sent by the micro switch 70;

[0039] When mounting materials again, first hang the materials on the inner arc connection between the upper swing arm 501 and the lower swing arm 502, and then manually push the upper swing arm 501 upward. During the upward movement of the upper swing arm 501, the limit pin 42 is squeezed by the inclined block 5011 and moves toward one side of the electromagnet 40 until the upper swing arm 501 is completely located above the limit pin 42. At this time, the hoisted materials are completely located in the locking area between the hook opening rocker arm 50 and the lower buckle rocker arm 51.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic hook throwing and recovery device, comprising a housing (10), a lifting ring (20) placed on the top of the housing (10), a sling (30) fixedly connected to the lifting ring (20), and a control line placed on the sling (30), characterized in that: A bearing (11) is fixedly connected between the lifting ring (20) and the housing (10); an upper cover plate (12) located above the bearing (11) is fixedly connected to the housing (10); and a bearing seat (13) abutting against the bearing (11) is threadedly connected to the lifting ring (20); An "L"-shaped support plate (14) is fixedly connected to one side of the shell (10), an electromagnet (40) is fixedly connected to the support plate (14), a push rod (41) penetrating the shell (10) is slidably connected to one side of the electromagnet (40), an end of the push rod (41) away from the electromagnet (40) is fixedly connected to a limit pin (42), a through slot (101) is provided at the bottom of the shell (10), a connecting shaft (102) penetrating the shell (10) and the through slot (101) is fixed to the bottom of the shell (10), a "C"-shaped hook-opening rocker arm (50) is rotatably connected to the connecting shaft (102), and the hook-opening rocker arm (50) is divided into a longer upper swing arm (501) and a shorter lower swing arm (502), one end of the upper swing arm (501) is overlapped on the limit pin (42), the connecting shaft (102) is rotatably connected with lower buckle rocker arms (51) located on both sides of the hook-opening rocker arm (50), a mounting area is formed between the hook-opening rocker arm (50) and the lower buckle rocker arm (51), one end of the two lower buckle rocker arms (51) away from the mounting area is fixed with a same connecting plate (511), both ends of the connecting plate (511) are in contact with the shell (10), one end of the connecting shaft (102) is fixed with a lower buckle torsion spring (52), one end of the lower buckle torsion spring (52) is fixed to the shell (10), and the other end of the torsion spring is against the bottom of the connecting plate (511).

2. The electromagnetic hook throwing and recovery device according to claim 1, characterized in that: A transfer rocker arm (60) is rotatably connected to a side of the housing (10) away from the electromagnet (40); a micro switch (70) located above the transfer rocker arm (60) is fixed in the housing (10); an elastic paddle (71) is fixed below the micro switch (70); a contact (701) abutting against the elastic paddle (71) is provided at the bottom of the micro switch (70); one end of the elastic paddle (71) is rotatably connected to a roller (71) in contact with the transfer rocker arm (60). 1), an arc-shaped hole (601) is formed on the transfer rocker arm (60), a pin shaft (103) penetrating the arc-shaped hole (601) is fixed inside the housing (10), a slider (104) is slidably connected to the pin shaft (103), the slider (104) and the pin shaft (103) are connected via a spring, the slider (104) contacts the transfer rocker arm (60), and the rotation positions of the hook-opening rocker arm (50) and the transfer rocker arm (60) are respectively fixed with stop blocks (80) that abut against each other.

3. The electromagnetic hook throwing and recovery device according to claim 1, characterized in that: A cavity (201) is provided in the lifting ring (20), a mounting plate (105) is fixedly connected to the bottom of the lifting ring (20), an electric slip ring (90) located inside the cavity (201) is coaxially fixed on the mounting plate (105), a connecting wire at the lower end of the electric slip ring (90) is respectively connected to the electromagnet (40) and the micro switch (70), and a connecting wire at the upper end of the electric slip ring (90) passes through the housing (10) and is connected to a control wire.

4. The electromagnetic hook throwing and recovery device according to claim 1, characterized in that: A downward-compression torsion spring (53) is provided at one end of the connecting shaft (102) away from the downward-compression torsion spring (52); one end of the downward-compression torsion spring (53) is fixed to the housing (10); and the other end of the downward-compression torsion spring (53) abuts against the top of the upper swing arm (501).

5. The electromagnetic hook throwing and recovery device according to claim 2, characterized in that: The micro switch (70) is sleeved with a switch box (72), the housing (10) is provided with an arc-shaped groove (106) located on one side of the switch box (72), one end of the switch box (72) is rotatably connected to the housing (10), the other end of the switch box (72) is connected to the arc-shaped groove (106) by means of bolts, the top of the housing (10) is threadedly connected with a stud (73), one end of the stud (73) passes through the housing (10) and abuts against one side of the top of the switch box (72).

6. The electromagnetic hook throwing and recovery device according to claim 1, characterized in that: The push rod (41) is connected to the support plate (14) via a spring, waist-shaped rings (107) located on both sides of the through slot (101) are fixed on the housing (10), the two ends of the limit pin (42) slide inside the corresponding waist-shaped rings (107) respectively, and an inclined block (5011) is fixed to the end of the upper swing arm (501) that contacts the limit pin (42).

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