Parachute opening mechanism and unmanned aerial vehicle

Abstract

The utility model relates to a parachute opening mechanism and unmanned aerial vehicle, belongs to the technical field of parachute cabin opening, including locking assembly and unlocking assembly, the locking assembly includes base mechanism and parachute cabin lock hook mechanism, the base mechanism with parachute cabin lock hook mechanism rotates and connects, the unlocking assembly with parachute cabin lock hook mechanism cooperates, the parachute cabin lock hook mechanism includes lock hook body, is provided with movable slot hole on the lock hook body, the unlocking assembly includes end face cam, is equipped with rotating bearing on the end face cam, rotating bearing with movable slot hole cooperation, rotating bearing sets up in movable slot hole.

Description

Technical Field

[0001] This invention belongs to the field of parachute opening technology, and particularly relates to parachute opening mechanisms and drones. Background Technology

[0002] The most widely used method for drone recovery is parachute recovery. Parachute recovery methods for drones include pyrotechnic deployment and servo-driven deployment. For example, Chinese patent CN201520903200.8 discloses a rapid-deployment parachute compartment structure for drones, which includes a compartment body and a canopy. The compartment body is equipped with a servo mounting bracket, on which a servo motor, a bidirectional servo plate connected to the servo motor, and left and right mounting lugs respectively connected to the bidirectional servo plate are fixedly mounted.

[0003] However, this method of directly rotating and disengaging via a servo motor results in relatively low effective force at the connection between the locking hook and the parachute compartment during disengagement, which is not conducive to reliable disengagement and may lead to disengagement failure.

[0004] Therefore, there is an urgent need to develop a parachute opening mechanism and a drone to solve the problems in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a parachute opening mechanism and a drone, which can connect or disconnect with the parachute compartment connecting seat by rotating the parachute compartment locking hook mechanism, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the specific technical solution of the present invention is as follows:

[0007] The umbrella opening mechanism includes a locking component and an unlocking component. The locking component includes a base mechanism and an umbrella compartment locking hook mechanism, which are rotatably connected. The unlocking component cooperates with the umbrella compartment locking hook mechanism. The umbrella compartment locking hook mechanism includes a locking hook body with a movable slot. The unlocking component includes an end face cam with a rotary bearing that cooperates with the movable slot. The rotary bearing is disposed in the movable slot.

[0008] Furthermore, the vertical width of the movable slot is greater than the diameter of the rotary bearing.

[0009] Furthermore, the locking assembly also includes a mechanical lock, which includes a housing mechanism and a locking mechanism. The housing mechanism and the locking mechanism are slidably connected. The rear end of the locking mechanism is connected to the housing mechanism via a return spring. The locking mechanism includes an upper locking part and a lower locking part, and the length of the upper locking part is greater than the length of the lower locking part.

[0010] Furthermore, the parachute compartment locking hook mechanism is provided with a limiting hole, which is located above the movable slot, and the upper locking part cooperates with the limiting hole.

[0011] Furthermore, the end face cam is provided with a limiting groove, which is located on the side near the drive component. One end of the limiting groove is a slope, and the other end is a limiting surface. The lower locking part cooperates with the limiting groove.

[0012] Furthermore, one end of the lower locking portion is hemispherical or has a chamfer, and the lower locking portion is located near the limiting groove.

[0013] Furthermore, it also includes a driving component, which is connected to the unlocking component and is disposed on the base mechanism. The base mechanism is provided with a connecting plate, and the base mechanism is connected to the driving component through the connecting plate.

[0014] Furthermore, the drive assembly includes a geared motor with a bearing shaft. The geared motor is connected to the end face cam via the bearing shaft, and the geared motor drives the end face cam to rotate.

[0015] Furthermore, the parachute compartment locking mechanism includes a locking hook body, which has a connecting part, a locking hook part and a movable slot. The connecting part is rotatably connected to the base mechanism. The locking hook part is used to lock the parachute compartment connecting seat of the UAV. The movable slot cooperates with the unlocking component.

[0016] Furthermore, the end face cam is provided with a limiting groove, which is located on the side close to the reduction motor. One end of the limiting groove is a slope, and the other end is a limiting surface. The lower locking part cooperates with the limiting groove.

[0017] Furthermore, the parachute compartment locking hook mechanism is also provided with a limiting hole, which is located above the movable slot, and the upper locking part cooperates with the limiting hole.

[0018] Furthermore, the locking assembly also includes a micro switch, which is disposed on the connecting plate of the base mechanism. The micro switch has a switching element, which is disposed near the umbrella compartment locking hook mechanism and cooperates with the umbrella compartment locking hook mechanism.

[0019] The drone, including the aforementioned parachute deployment mechanism.

[0020] This invention has the following advantages: The unlocking mechanism includes a rotating wheel with rotating sub-wheels on it; the hook-lock unit includes a hook-lock body with a rotating slot; the rotating sub-wheels are located within the rotating slots, allowing the hook to disengage only when the rotating sub-wheels reach the edge of the slots. This provides a stronger disengagement force, facilitating rapid disengagement and improving the reliability of the umbrella during opening. Furthermore, this invention uses a geared motor for disengagement, allowing for reuse and lower cost.

[0021] Furthermore, the connecting part and the hook lock part are located on the same side of the hook lock body, and the rotating slot is located on the other side of the hook lock body. To a certain extent, the lever principle is utilized to increase the effective unhooking force when the hook lock body is unhooked.

[0022] Furthermore, when locked, the upper locking part enters the limiting hole of the hook lock unit under the action of the return spring, and at the same time, the lower locking part also enters the limiting groove of the rotating wheel. The limiting surface on the limiting groove can limit the further movement of the hook lock unit, and the limiting hole can limit the movement of the hook lock unit, which further improves the reliability of the device when locking and after locking.

[0023] Other features and advantages of the present invention will be disclosed in detail in the following detailed description and accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the base mechanism of the present invention;

[0026] Figure 3 This is a schematic diagram of the umbrella compartment locking hook mechanism of the present invention;

[0027] Figure 4 This is a schematic diagram of the end face cam structure of the present invention;

[0028] Figure 5 This is an exploded view of the mechanical lock structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the micro switch structure of the present invention;

[0030] Figure 7 This is the main view of the overall structure of this application.

[0031] The markings in the diagram are as follows: 1. Base mechanism; 11. Connecting plate; 2. Parachute compartment locking hook mechanism; 21. Connecting part; 22. Locking hook part; 23. Movable slot; 3. Parachute compartment connecting seat; 4. End face cam; 41. Slope; 42. Limiting surface; 43. Rotary bearing; 5. Gear motor; 6. Mechanical lock; 61. Upper locking part; 62. Lower locking part; 63. Front housing; 64. Return spring; 65. Rear housing; 7. Micro switch. Detailed Implementation

[0032] To better understand the purpose, structure, and function of this invention, a more detailed description is provided below with reference to the accompanying drawings. In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] umbrella opening mechanism, such as Figures 1 to 7 As shown, it includes a locking component, a driving component, and an unlocking component. The driving component is connected to the unlocking component, the locking component is connected to the unlocking component, and the locking component is connected to the driving component.

[0034] The locking assembly includes a base mechanism 1 and a parachute compartment locking hook mechanism 2. The base mechanism 1 and the parachute compartment locking hook mechanism 2 are connected, preferably by a rotatable connection. Optionally, one end of the parachute compartment locking hook mechanism 2 is connected to the base mechanism 1 via a pivot. The pivot can be a pin. The base mechanism 1 is connected to the drive assembly, the drive assembly is connected to the unlocking assembly, and the unlocking assembly cooperates with the parachute compartment locking hook mechanism 2.

[0035] The parachute compartment locking mechanism 2 includes a locking hook body, which has a connecting part 21, a locking hook part 22 and a movable slot 23. The connecting part 21 is used to rotatably connect with the base mechanism 1 via a pin, and the locking hook part 22 is used to lock the parachute compartment connecting seat 3 of the UAV, and has the same reliability as an explosion screw.

[0036] The base mechanism 1 is also provided with a connecting plate 11. The base mechanism 1 is connected to the drive component through the connecting plate 11. The connection method between the base mechanism 1 and the drive component includes fastener connection.

[0037] The drive assembly includes a geared motor 5, which is connected to the connecting plate 11 via fasteners. The geared motor 5 is equipped with a bearing shaft, which is connected to the unlocking assembly. The bearing shaft passes through the connecting plate 11.

[0038] The unlocking component includes an end face cam 4. The reduction motor 5 is connected to the end face cam 4 via a bearing shaft. The reduction motor 5 drives the end face cam 4 to rotate via the bearing shaft, which passes through the middle position of the end face cam 4. The bearing shaft can be connected to the end face cam 4 via fasteners.

[0039] The end face cam 4 is provided with a rotary bearing 43. The rotary bearing 43 is not located in the middle of the end face cam 4. Preferably, the rotary bearing 43 is located on the edge of the end face cam 4. Optionally, the rotary bearing 43 is rotatably connected to the end face cam 4.

[0040] The rotary bearing 43 engages with the movable slot 23 of the parachute compartment locking hook mechanism 2. The rotary bearing 43 is disposed in the movable slot 23, and the diameter of the rotary bearing 43 is smaller than the length or height of the movable slot 23. Preferably, the rotary bearing 43 passes through the movable slot 23.

[0041] The end face cam 4 is provided with a limiting groove, which is located on the side near the reduction motor 5. One end of the limiting groove is a slope 41, and the other end is a limiting surface 42. Preferably, the opening size of the limiting groove gradually decreases as it approaches the center of the end face cam 4. Preferably, the length of the lower end of the slope 41 is less than the length of the upper end of the slope 41. The slope 41 is a relatively gentle slope, which does not restrict the locking lower part 62 of the locking mechanism, allowing the locking lower part 62 to freely pass through the slope 41 and enter the limiting groove. The limiting surface 42 is a relatively steep surface, which prevents the locking lower part 62 from moving forward after entering the limiting groove, and it can only return from the slope 41.

[0042] The locking assembly further includes a mechanical lock 6, which is fixed to the connecting plate 11. In this embodiment, the mechanical lock 6 includes a housing mechanism and a locking mechanism, which are slidably connected. The locking mechanism is disposed within the housing mechanism and passes through the connecting plate 11. The housing mechanism includes a front housing 63 and a rear housing 65, which can be connected by fasteners. A limit post is provided on the rear housing 65, and a return spring 64 is sleeved on the limit post. The rear end of the locking mechanism is connected to the rear housing 65 through the return spring 64. Optionally, the front housing 63 is slidably connected to the locking mechanism, and the locking mechanism extends out of the front housing 63, providing a guiding function to a certain extent.

[0043] The locking mechanism includes an upper locking portion 61 and a lower locking portion 62. Optionally, the length of the upper locking portion 61 is greater than the length of the lower locking portion 62. Preferably, the upper locking portion 61 protrudes further toward the parachute cabin locking hook mechanism 2 than the lower locking portion 62.

[0044] Optionally, the parachute compartment locking hook mechanism 2 is further provided with a limiting hole, which is located above the movable slot 23. The limiting hole cooperates with the upper locking part 61, and the lower locking part 62 cooperates with the limiting groove on the end face cam 4. When locked, the upper locking part 61 passes through the limiting hole to restrict the rotation of the parachute compartment locking hook mechanism 2. At the same time, the lower locking part 62 enters the limiting groove. At this time, the limiting surface 42 in the limiting groove can contact the lower locking part 62, thereby restricting the continued rotation of the end face cam 4. Preferably, the front end of the lower locking part 62 is semi-circular. This application uses a mechanical limiting method, by using the upper locking part 61 to pass through the limiting hole to limit the parachute compartment locking hook mechanism 2, which has high reliability, and its reliability is similar to that of an explosion screw. Figure 4 As shown, in the limiting groove provided in this application, there is a certain distance between the slope 41 and the limiting surface 42, so that within a certain range of motor rotation angle, the upper locking part 61 is always located in the limiting hole. Even if the motor has a large rotation angle error, the parachute cabin locking hook mechanism 2 can still be locked, which has high reliability and is also conducive to cost reduction.

[0045] Optionally, the locking assembly further includes a micro switch 7, which can be disposed on the connecting plate 11 of the base mechanism 1. The micro switch 7 is provided with a switching element 71, which is disposed near the umbrella compartment locking hook mechanism 2. Preferably, the switching element 71 is disposed on the rotation path of the umbrella compartment locking hook mechanism 2. During rotation, when the umbrella compartment locking hook mechanism 2 rotates to a designated position, the umbrella compartment locking hook mechanism 2 contacts the switching element 71 to stop the operation of the reduction motor 5.

[0046] When unlocking, the reduction motor 5 works, the end face cam 4 mounted on the motor shaft rotates, driving the rotary bearing 43 to rotate. The rotary bearing 43 is in the movable slot 23, causing the umbrella compartment locking hook mechanism 2 to rotate. The locking hook part 22 disengages from the umbrella compartment connecting seat 3, causing the closed umbrella compartment cover to open.

[0047] When locked, the geared motor 5 works, and the end face cam 4 mounted on the motor shaft rotates in the opposite direction, driving the rotary bearing 43 to rotate. The rotary bearing 43 is in the movable slot 23, causing the umbrella compartment locking hook mechanism 2 to rotate. The locking hook part 22 reconnects with the umbrella compartment connecting seat 3, thus locking the closed umbrella compartment cover.

[0048] During locking, as the parachute compartment locking hook mechanism 2 rotates and reaches the predetermined position, the upper locking part 61, under the action of the return spring 64, enters the limiting hole of the parachute compartment locking hook mechanism 2. Simultaneously, the lower locking part 62 also enters the limiting groove of the end face cam 4. The limiting surface 42 on the limiting groove can restrict further movement of the parachute compartment locking hook mechanism 2, and the limiting hole can restrict the movement of the parachute compartment locking hook mechanism 2, improving the reliability of the device during and after locking. Furthermore, when the parachute compartment locking hook mechanism 2 rotates to the predetermined position, its upper end, away from the rotation center, touches the switching element 71 of the micro switch 7, which can stop the geared motor 5, further improving the reliability of the device.

[0049] When unlocking, the end face cam 4 rotates in the opposite direction, and the lower locking part 62 slides towards the rear housing 65 under the action of the slope 41. At the same time, it drives the upper locking part 61 to exit the limiting hole on the parachute compartment locking hook mechanism 2. After that, the parachute compartment locking hook mechanism 2 begins to rotate under the action of the rotating bearing 43.

[0050] Optionally, the movable slot 23 can be an oblong hole or an oblong hole with arc-shaped upper and lower sides. The rotary bearing 43 mates with the movable slot 23. When it is only an oblong hole, the vertical width of the oblong hole is greater than the outer diameter of the rotary bearing 43. Sufficient clearance is provided in the vertical width of the oblong hole to prevent the lower part 62 from disengaging from the limiting slot or the upper part 61 from disengaging from the limiting hole on the parachute hook mechanism 2. Figure 7As shown, when the rotary bearing 43 rotates to its highest position on the end face cam 4, the rotational force of the rotary bearing 43 is almost horizontal. At this time, the unhooking component force of the downward rotation of the parachute compartment locking hook mechanism 2 caused by the rotary bearing 43 is close to zero, which is not conducive to quick and effective unhooking. However, the vertical width of the movable slot 23 in this application is greater than the outer diameter of the rotary bearing 43, so that there is a certain gap between the outer periphery of the rotary bearing 43 and the upper or lower inner wall of the movable slot 23. When unhooking begins, the rotary bearing 43 is not located at the highest position of the end face cam 4. The component force it applies to the parachute compartment locking hook mechanism 2 for unhooking is greater than the component force generated when the rotary bearing 43 is located at the highest position of the end face cam 4, which is conducive to quick and effective unhooking and improves the reliability of this application. Moreover, the aforementioned limiting groove can cooperate with the rotary bearing 43, allowing the rotary bearing 43 to rotate a certain angle in advance to achieve quick and effective unhooking.

[0051] Optionally, when the rotary bearing 43 moves to both sides of the movable slot 23, the rotary bearing 43 drives the parachute lock hook mechanism 2 to rotate.

[0052] Pushing open the mechanical lock 6 simultaneously triggers the rotating lock hook, disengaging it from the umbrella compartment connecting seat, thus completing the opening process. Locking function: The geared motor 5 operates, rotating the end face cam 4 mounted on the motor shaft (at this time, the mechanical lock 6 is already in the pushed-open state). The bearing on the cam triggers the rotating lock hook, engaging it with the umbrella compartment connecting seat. Simultaneously, the telescopic pin on the mechanical lock 6 extends into the hole of the rotating lock hook due to spring action, positioning the rotating lock hook. This is also when the upper left side of the rotating lock hook contacts the micro switch 7, causing the micro switch 7 to activate and stop the motor rotation, ending the operation.

[0053] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An umbrella opening mechanism, characterized in that, The device includes a locking component and an unlocking component. The locking component includes a base mechanism and a parachute compartment locking hook mechanism, which are rotatably connected. The unlocking component cooperates with the parachute compartment locking hook mechanism. The parachute compartment locking hook mechanism includes a locking hook body with a movable slot. The unlocking component includes an end face cam with a rotary bearing that cooperates with the movable slot. The rotary bearing is disposed in the movable slot. The locking assembly further includes a mechanical lock, which includes a housing mechanism and a locking mechanism. The housing mechanism and the locking mechanism are slidably connected. The rear end of the locking mechanism is connected to the housing mechanism via a return spring. The locking mechanism includes a locking lower part. The end face cam is provided with a limiting groove, one end of which is a slope and the other end is a limiting surface. The locking lower part cooperates with the limiting groove.

2. The umbrella opening mechanism according to claim 1, characterized in that, The vertical width of the movable slot is greater than the diameter of the rotary bearing.

3. The umbrella opening mechanism according to claim 2, characterized in that, The locking mechanism further includes an upper locking part, the length of which is greater than the length of the lower locking part.

4. The umbrella opening mechanism according to claim 3, characterized in that, The parachute compartment locking hook mechanism is provided with a limiting hole, which is located above the movable slot, and the upper locking part cooperates with the limiting hole.

5. The umbrella opening mechanism according to claim 3, characterized in that, The limiting groove is located on the side near the drive component.

6. The umbrella opening mechanism according to claim 5, characterized in that, One end of the lower locking part is hemispherical or has a chamfer, and the lower locking part is the end close to the limiting groove.

7. The umbrella opening mechanism according to claim 6, characterized in that, It also includes a drive component, which is connected to the unlocking component and is disposed on the base mechanism.

8. The umbrella opening mechanism according to claim 7, characterized in that, The drive assembly includes a geared motor with a bearing shaft. The geared motor is connected to the end face cam via the bearing shaft, and the geared motor drives the end face cam to rotate.

9. The umbrella opening mechanism according to any one of claims 1-8, characterized in that, The locking assembly also includes a micro switch, which is disposed on the connecting plate of the base mechanism. The micro switch has a switching element, which is close to the umbrella compartment locking hook mechanism and cooperates with the umbrella compartment locking hook mechanism.

10. An unmanned aerial vehicle (UAV), characterized in that, Includes the umbrella opening mechanism as described in any one of claims 1-9.

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