A hatch stowage device

Abstract

The application discloses a cabin door folding and unfolding device for folding and unfolding a cabin door, which comprises a pushing rod and a pushing fork. The pushing rod is arranged on a strut of a landing gear, and the pushing fork is arranged on the cabin door. The pushing rod moves with the landing gear. During folding or unfolding of the cabin door, the pushing rod contacts the pushing fork and drives the pushing fork to move. In this way, the folding and unfolding movement of the cabin door is driven by the pushing rod arranged on the landing gear, the cabin door moves with the pushing fork, and the folding and unfolding are realized. Therefore, the cabin door folding and unfolding device with the structure does not need to be provided with a special driving device for the cabin door, the folding and unfolding of the cabin door can be completed, the weight is reduced, the flight efficiency of the unmanned aerial vehicle is improved, the structure is simple, the invalid action of the cabin door folding and unfolding is reduced, the space utilization rate of the unmanned aerial vehicle is improved, and good workability and economy are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of unmanned aerial vehicles, in particular to a hatch retraction device. BACKGROUND

[0002] The unmanned aerial vehicle is provided with an autopilot, a program control device and other equipment, and can be tracked, positioned, remotely controlled, remotely measured and digitally transmitted by ground personnel. Compared with manned aircraft, the unmanned aerial vehicle has the advantages of small size, low cost, easy use, low use environment requirement, etc., and is widely used in military, agricultural, photography and other fields. With the development of unmanned aerial vehicle technology, the application scenarios of unmanned aerial vehicles are more extensive.

[0003] The landing gear is an important component of the lower part of the unmanned aerial vehicle for take-off and landing, ground sliding and supporting the whole unmanned aerial vehicle, and the retraction of the landing gear is often accompanied by the retraction of the hatch. In the prior art, the hatch of the unmanned aerial vehicle generally needs to be provided with a driving device to complete the retraction movement. However, the retraction mechanism of the driving device needs to realize linkage of the mechanism through rocker arms, pull rods, joints and other parts, which has a complex structure, a heavy weight, a large occupied movement space, and the whole movement of the hatch is driven by the connecting rod, which has too many invalid actions, affecting the space utilization and flight efficiency of the unmanned aerial vehicle.

[0004] To sum up, how to provide a simple and efficient hatch retraction device is a problem to be solved by the technical personnel in the field at present. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a hatch retraction device which can complete the retraction movement with the retraction of the landing gear and has a simple and efficient structure.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A hatch retraction device for retracting a hatch, the hatch retraction device comprising: a lever and a fork, the lever being arranged on a strut of a landing gear, and the fork being arranged on the hatch, the lever moving with the landing gear, and the lever contacting the fork and driving the fork to move during the process of retracting or releasing the hatch.

[0008] The hatch retraction device further comprises a rocker arm and a pull rod, the rocker arm being rotatably arranged between the fork and the pull rod, and the end of the pull rod being rotatably connected with the hatch.

[0009] The hatch retraction device further comprises a support, the support being arranged on the hatch, and the support being rotatably connected with the end of the pull rod.

[0010] The hatch retraction device further comprises a support, the support being arranged on the hatch, and the support being rotatably connected with the end of the pull rod.

[0011] The cabin door retraction device is characterized in that a stopper is arranged on the push rod and fixedly connected to the push rod and clamped and fixed to the outer wall of the support column.

[0012] The cabin door retraction device is characterized in that a rolling body is rotatably arranged on one end of the push fork facing the push rod and arranged along the width direction of the push fork.

[0013] The cabin door retraction device is characterized in that protrusions are arranged on both ends of the push rod and inserted into the push fork and in contact with the rolling body during the retraction or release of the cabin door.

[0014] The cabin door retraction device is characterized in that a bushing is arranged on the outer wall of the rolling body.

[0015] The cabin door retraction device is characterized in that the surface of the push rod is chrome-plated.

[0016] The cabin door retraction device is characterized in that the length of the connecting rod connected to the rocker arm is adjustable.

[0017] With respect to the background art, the cabin door retraction device provided by the present application retracts and releases the cabin door by retracting and releasing the landing gear, comprising a push rod arranged on the support column of the landing gear and moving with the movement of the landing gear and a push fork arranged on the cabin door, the retraction and release movement of the cabin door being driven by the push rod arranged on the landing gear, the push rod being in contact with the push fork and driving the push fork to move during the retraction or release of the cabin door, so that the cabin door moves with the push fork to be opened or closed. Therefore, the cabin door retraction device provided by the present application can complete the retraction and release of the cabin door without the need of arranging a special driving device, thereby reducing the weight, improving the flight efficiency of the unmanned aerial vehicle, and having a simple structure, reducing the invalid movement of the cabin door during retraction and release, improving the space utilization rate of the unmanned aerial vehicle, and having good workability and economy. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can also obtain other drawings according to the provided drawings without any creative effort.

[0019] Figure 1 The structure diagram of the push rod of the cabin door retraction device provided by the present application away from the push fork;

[0020] Figure 2 The schematic diagram of the intersection of the push rod and the push fork of the cabin door retraction device provided by the present application;

[0021] Wherein:

[0022] 1-cabin door,

[0023] 2-push rod, 21-protrusion,

[0024] 3 - yoke, 31 - rolling body,

[0025] 4 - strut, 41 - through hole, 5 - rocker arm, 6 - pull rod, 7 - support, 8 - front tire, 9 - brace. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0028] The cabin door retraction device provided by the embodiments of the present application is used for retracting and releasing the cabin door 1, and can refer to the drawings and specific embodiments of the description Figure 1 to the drawings Figure 2 , including a lever 2 and a yoke 3, the lever 2 is arranged on a strut 4 of a landing gear, the yoke 3 is arranged on the cabin door 1, the lever 2 moves with the landing gear, and in the process of retracting or releasing the cabin door 1, the lever 2 contacts the yoke 3 and drives the yoke 3 to move.

[0029] The cabin door retraction device is fixedly installed on the front cabin door 1, and the front cabin door 1 is provided with two, which are respectively located on the left and right sides of the front landing gear. Therefore, the cabin door retraction device is provided with two and is symmetrically arranged with respect to the front landing gear, and the drawings and specific embodiments of the description Figure 1 In the drawings, only the left cabin door 1 is drawn, the strut 4 is located above the front tire 8 to provide support for the front tire 8, the brace 9 and the strut 4 are rotationally connected, and the retraction and release of the front landing gear can be transmitted and controlled through the brace 9. During the retraction of the landing gear, the lever 2 moves with the strut 4, and in the latter half of the retraction of the strut 4, the lever 2 contacts the yoke 3, thereby driving the cabin door 1 to retract, so that the cabin door 1 moves with the landing gear. Similarly, during the release of the landing gear, the lever 2 moves with the strut 4, and since the lever 2 and the yoke 3 are initially in contact, the cabin door 1 is opened, and after the cabin door 1 is completely opened, the lever 2 leaves the yoke 3, and the lever 2 continues to move with the strut 4.

[0030] The cabin door retraction device further comprises a rocker arm 5 and a pull rod 6, the rocker arm 5 is rotatably arranged between the fork 3 and the pull rod 6, and the end of the pull rod 6 is rotatably connected with the cabin door 1. The rocker arm 5 and the pull rod 6 are arranged between the cabin door 1 and the fork 3, which can assist the fork 3 in controlling the retraction of the cabin door 1. The rocker arm 5 and the fork 2 are assembled on the fuselage structure and form a rotating pair with the fuselage, which assists the retraction of the cabin door 1. The pull rod 6 is directly connected with the cabin door 1, which can adjust the retraction gap of the front cabin door 1 and has the function of maintaining the cabin door 1. When the lever 2 is in contact with the fork 3, the axis of the lever 2 intersects with the axis of the fork 3 at a virtual point. The front cabin door 1 intersects with the strut 4 through the virtual point when the rocker arm 5 is retracted, thereby forming a single degree of freedom motion system of the strut 4-cabin door retraction device-cabin door 1, and realizing the retraction movement of the front cabin door 1.

[0031] As shown in the accompanying drawings of the specification, Figure 1 The cabin door retraction device further comprises a support 7 arranged on the cabin door 1, and the support 7 is rotatably connected with the end of the pull rod 5. The pull rod 6 is connected with the cabin door 1 through the support 7, so that the pull rod 6 can rotate relative to the cabin door 1 during the retraction of the cabin door 1, avoiding the situation of being stuck.

[0032] The strut 4 is provided with a through hole 41 in the radial direction, and the lever 2 passes through the through hole 41 and is symmetrically arranged on both sides of the strut 4. The lever 2 needs to be connected with the fork arranged on the cabin door 1 on both sides during the retraction of the strut 4, so the through hole 41 is arranged in a direction perpendicular to the length of the strut 4 and in a direction extending to the cabin door 1 on both sides. At the same time, the cabin door retraction device is symmetrically arranged on the two front cabin doors 1 relative to the landing gear, so that when the lever 2 is inserted into the through hole 41, the parts of the lever 2 extending out of the strut 4 on both sides are the same, and the lever 2 is symmetrically arranged relative to the strut 4, which can retract the front cabin doors 1 on both sides synchronously. Of course, there are many ways to connect the lever 2 with the strut 4, such as welding or threaded connection, as long as the lever 2 can be reliably fixed on the strut 4, which is not limited in this article.

[0033] As shown in the accompanying drawings of the specification, Figure 2 The end of the fork 3 facing the lever 2 is rotatably provided with a rolling body 31, and the rolling body 31 is arranged along the width direction of the fork 3. The two ends of the lever 2 are provided with protrusions 21, which are inserted into the fork 3 and in contact with the rolling body 31 during the retraction or release of the cabin door 1.

[0034] To ensure stable movement of the shift fork 3 when it contacts the shift lever 2, the shift fork 3 has a rolling element 31 and a groove at its end, while the shift lever 2 has a protrusion 21 at its end. When the shift lever 2 contacts the shift fork 3, the protrusion 21 inserts into the groove, achieving engagement between the shift lever 2 and the shift fork 3. This ensures a tighter connection between the shift lever 2 and the shift fork 3, preventing disengagement during the movement of the shift lever 2 and the shift fork 3, thus guaranteeing greater reliability of the hatch 1 during opening and closing. The rolling element 31 is provided because the protrusion 21 contacts the shift fork 3 at the moment of contact or disengagement, and relative movement occurs between the contact surfaces. This reduces contact friction and improves the smoothness of the contact. Specifically, since the rolling element 31 can rotate, when the protrusion 21 contacts or disengages from the rolling element 31, the rolling element 31 rotates, transforming sliding friction into rolling friction, thereby reducing wear.

[0035] When both ends of the lever 2 have protrusions 21, the lever 2 cannot be directly inserted into the through hole 41. This can be addressed by separating the lever 2 into two sections: one end of the lever 2 has a protrusion 21, and the other end has a thread. A nut is placed in the middle of the support column 4. Both sections of the lever 2 are inserted into the through hole 41 from their threaded ends, and the two sections are connected by the nut. Alternatively, the lever 2 can be configured with the protrusions 21 and the lever 2 separate. The protrusion 21 can have external threads, and the lever 2 can have internal threads. The lever 2 is inserted into the through hole 41 and then connected to the protrusion 21 by the threads. There are various ways to configure the lever 2 and the protrusion 21, which are not limited in this paper.

[0036] The outer wall of the rolling element 31 is fitted with a bushing. The surface of the lever 2 is chrome-plated. Since the protrusion 21 is subjected to the impact of the landing gear at the moment of contact or separation from the rolling element 31, a large force is suddenly generated. The bushing and the chrome plating of the lever 2 can improve the hardness. Furthermore, when the protrusion 21 rolls with the rolling element 31, it can also reduce wear and extend the service life of the lever 2 and the fork 3. At the same time, it can prevent the opening and closing deviation caused by wear and improve the reliability of the door opening and closing device.

[0037] As per the instruction manual Figure 1 To be continued Figure 2As shown, the length of the connection between the pull rod 6 and the rocker arm 5 is adjustable. By adjusting the length of the pull rod 6, the distance between the rocker arm 5 and the support 7 can be adjusted, thereby controlling the opening and closing angle clearance of the hatch 1. In this embodiment, the pull rod 6 can adopt a double-ended stud structure. In this way, the part connecting the rocker arm 5 and the support 7 to the pull rod 6 is equipped with a nut structure, and the rocker arm 5 and the support 7 are provided with grooves. By rotating the pull rod 6 clockwise or counterclockwise, the distance between the rocker arm 5 and the support 7 can be changed, thereby adjusting the step and clearance of the hatch 1 closing. During the adjustment of the pull rod 6, both ends of the pull rod 6 extend into the grooves. Therefore, the size and depth of the grooves are set according to the length of the pull rod 6. Of course, the pull rod 6 can also adopt other adjustable length structures, which are not limited in this article.

[0038] The lever 2 is provided with a circumferential stop. In this embodiment, the lever 2 is inserted into the through hole 41 on the support column 4. To prevent the lever 2 from rotating within the through hole 41 and to prevent the lever 2 from moving axially within the through hole 41, which would cause the protrusion 21 to not accurately engage with the rolling element 31, a stop is required on the lever 2. One end of the stop can be fixedly connected to the lever 2, and a slot is provided on the support column 4. The other end of the stop is inserted into the slot for fixation. Of course, other structures to prevent the lever 2 from rotating can also be used, and this document does not limit this. In addition, when the lever 2 is directly fixedly connected to the support column 4, there is no need to consider the issue of the lever 2 rotating.

[0039] The operation of the door retraction device is as follows: When the landing gear retracts, the strut 9 drives the support column 4 to retract upwards. After the landing gear retracts to a certain position, the lever 2 contacts the shift fork 3. At this time, the protrusion 21 engages with the rolling element 31 from below, and the landing gear continues to retract. The lever 2 drives the shift fork 3, rocker arm 5, and pull rod 6 to retract, thereby pulling the door 1 back. When the door 1 is fully retracted, the lever 2 disengages from the shift fork 3, and the landing gear continues to retract. When the landing gear is lowered, the strut 9 drives the strut 4 to lower. After the landing gear is lowered to a certain position, the lever 2 contacts the shift fork 3. At this time, the protrusion 21 engages with the rolling element 31 from above. The landing gear continues to lower. The lever 2 drives the shift fork 3, rocker arm 5 and pull rod 6 to lower, thereby pulling the door 1 to lower. When the door 1 is fully lowered, the lever 2 disengages from the shift fork 3, and the landing gear continues to lower until the lowering action is completed.

[0040] The hatch retraction and deployment device provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A hatch retraction device for retracting or extending a hatch (1), characterized in that, The door (1) retraction device includes a lever (2) and a fork (3). The lever (2) is mounted on the landing gear strut (4), and the fork (3) is mounted on the door (1). The lever (2) moves with the landing gear. During the process of the door (1) being retracted or extended, the lever (2) contacts the fork (3) and drives the fork (3) to move. The fork (3) is rotatably provided with a rolling element (31) at one end facing the lever (2). The rolling element (31) is arranged along the width direction of the fork (3). The lever (2) has protrusions (21) at both ends and a groove at the end of the fork (3). During the process of the hatch (1) being raised or lowered, the lever (2) contacts the fork (3) and the protrusions (21) are inserted into the groove, thereby achieving contact between the lever (2) and the rolling element (31).

2. The hatch retraction device according to claim 1, characterized in that, It also includes a rocker arm (5) and a lever (6), the rocker arm (5) being rotatably disposed between the fork (3) and the lever (6), and the end of the lever (6) being rotatably connected to the hatch (1).

3. The hatch retraction device according to claim 2, characterized in that, It also includes a support (7), which is located on the hatch (1) and is rotatably connected to the end of the pull rod (6).

4. The hatch retraction device according to claim 1, characterized in that, The support column (4) has a through hole (41) in the radial direction, and the lever (2) passes through the through hole (41) and is symmetrically arranged on both sides of the support column (4).

5. The hatch retraction device according to claim 4, characterized in that, The outer wall of the rolling element (31) is fitted with a bushing.

6. The hatch retraction device according to claim 5, characterized in that, The surface of the lever (2) is chrome plated.

7. The hatch retraction device according to claim 2, characterized in that, The length of the connection between the pull rod (6) and the rocker arm (5) is adjustable.

8. The hatch retraction device according to claim 4, characterized in that, The lever (2) is provided with a circumferential stop.

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