CN113320713B - Quick-release maintenance covering cap device for large opening surface of nacelle - Google Patents

Abstract

The invention discloses a nacelle large-opening-face quick-release maintenance opening cover device and a design method, wherein the device comprises an opening cover, a pair of connecting rod devices and a pair of stop limiting devices, each connecting rod device comprises a connecting rod body, a first hinge, a second hinge, a first hinge support and a second hinge support, one end of each connecting rod body is connected with an opening frame of a nacelle through the first hinge, and the other end of each connecting rod body is connected with the opening cover through the second hinge; the first hinge is arranged on the first hinge support, and the first hinge support is arranged below one side of the opening frame; the second hinge is arranged on the second hinge support, and the second hinge support is arranged above one side of the opening cover; the stop limiting device comprises a stop pin and a stop slot, and the opening cover stops moving after the stop slot is in contact with the stop pin, so that the connecting rod body, the opening cover and the nacelle body are prevented from colliding. According to the invention, the moving stroke of the opening cover after being opened is large, the opening cover can be far away from the opening frame, the maintenance and operation channel of equipment in the hanging cabin is completely released, and the maintenance accessibility is good.

Description

A quick-release maintenance cover device for the large opening surface of the pod

technical field

The invention relates to the technical field of aircraft structure design, in particular to a quick-release maintenance cover device for a large opening of a pod.

Background technique

The access cover is an important part of the structure of the aircraft pod, and it is the installation, inspection and maintenance channel of the built-in equipment. With the improvement of pod integration technology, the number of built-in equipment gradually increases. In order to ensure that the equipment and accessories can be maintained and maintained in a timely manner, a large number of covers are provided on the surface of the pod to improve the maintainability of the pod.

At present, the hatch structure of the pod not only requires sufficient rigidity to ensure flight safety, but also requires that the hatch structure outside the pod cannot protrude from the shape of the pod; the hatch structure inside the pod requires a small space in the cabin; It must have sealing requirements such as rainproof; for the larger internal equipment and accessories of the pod, the cover also needs to provide a large enough operation and maintenance surface. Usually, the large mouth cover of the pod is detached, and it is completely separated from the cabin after disassembly. The screws need to be properly collected and placed in the packing box; the commonly used quick-release lid is a hinged sealing lid. This type of lid Usually the opening surface is small, and the quick-release lock takes up a lot of space, so there is an urgent need for a large-opening surface quick-release maintenance cover to improve the efficiency of outfield maintenance of large equipment in the pod.

Contents of the invention

In order to solve the above problems, the present invention proposes a quick-release maintenance cover device with a large opening surface of the pod. The cover device has a simple structure, a large opening surface, is easy to seal, and is convenient to disassemble.

The technical scheme that the present invention adopts is as follows:

A quick-release maintenance cover device for a large opening of a pod, including a cover, a pair of connecting rod devices, and a pair of stop and limit devices, wherein:

The connecting rod device includes a connecting rod body, a first hinge, a second hinge, a first hinge support and a second hinge support, one end of the connecting rod body is connected to the mouth frame of the pod through the first hinge, The other end is connected to the mouth cover through the second hinge; the first hinge is arranged on the first hinge support, and the first hinge support is arranged on the lower side of the mouth frame; The second hinge is set on the second hinge support, and the second hinge support is set on the upper side of the cover; when the cover is closed, the connecting rod body is in the retracted state, and the When the mouth cover is opened, the connecting rod body is in an extended state;

The stop and limit device includes a stop pin and a limit slot, the stop pin is set on the first hinge support, and the limit slot is set on the connecting rod body close to the mouth frame At the end of one side, when the limit card slot contacts the stop pin, the cover stops moving, thereby preventing the connecting rod body and the cover from colliding with the pod body.

The length a of the connecting rod body and the distance c between the second hinge and the upper edge of the flap should meet the following two design requirements:

a) The maximum mouth surface height H after the cover is opened should be greater than or equal to the height b of the mouth frame, so as to ensure that the maintenance channel of the equipment is not blocked when the cover is opened:

(1)

(1)

Wherein, β is the angle between the connecting rod body and the flap after the flap is opened;

b) After the cover is opened, the gap e between the connecting rod body and the mouth frame should be greater than or equal to the minimum safety gap e ₀ , so as to ensure that there is no collision between the connecting rod body and the mouth frame when the cover is opened :

(2)

(2)

Wherein, d is the distance between the center of the second hinge and the outer surface of the flap, and f is the width of the connecting rod body; the values of b, d, and f have been determined by the structure of the pod, and are determined by formula (1) and (2) It is possible to calculate and check the design value of the length a of the connecting rod body and the distance c between the second hinge and the upper edge of the flap, and determine that the connecting rod body is opened after the flap is opened. The included angle β with the cover is used as a basis for designing the stop pin and the limiting slot.

Further, a sealant layer is used for sealing between the mouth cover and the mouth frame, and the sealant layer is cured on the mouth frame.

Further, fixing screws are uniformly arranged around the opening cover, and the opening cover and the sealant layer are compressed by the fixing screws.

Further, the fixing screw adopts a four-thread captive screw. When the cover is opened, the fixing screw, the cover and the pod are all in a state of being inseparable, and none of them are separated from the pod. Structural subject.

Further, the inner side of the cover is provided with a grid-shaped rib structure.

Further, the first hinge support is riveted to the mouth frame by rivets.

Further, the second hinge support is riveted on the cover by rivets.

The beneficial effects of the present invention are:

(1) The quick-release maintenance cover device on the large surface of the pod in the present invention is mainly aimed at the maintenance requirements of relatively large built-in equipment. Operation channel, good accessibility for maintenance.

(2) The cover device in the present invention does not need to remove the screw, take and place the cover, screw alignment and other steps during the disassembly process. At the same time, the fastening screw of the cover is a quick-release screw, which saves operation and maintenance time and significantly Improve maintainability.

Description of drawings

Fig. 1 is a schematic diagram of the open state of the flap in Embodiment 1 of the present invention;

Fig. 2 is a schematic diagram of the inside of the mouth cover of Embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of the stopping and limiting device of Embodiment 1 of the present invention;

Fig. 4 is a schematic diagram of design parameters of the mouth cover in Embodiment 1 of the present invention;

Reference signs: 1—port cover; 2—pod cabin body; 3—connecting rod body; 4—first hinge; 5—second hinge; 6—support nut; 7—loose Captive screw; 8—sealant layer; 9—reinforcing rib; 10—stop pin; 11—limit card slot; 12—electronic equipment.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific implementations of the present invention are now described. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

As shown in Figures 1 and 2, this embodiment provides a quick-release maintenance cover device for the large opening of the pod, including a cover 1, a pair of connecting rod devices and a pair of stop and limit devices, wherein the connecting rod device includes The connecting rod body 3, the first hinge 4, the second hinge 5, the support of the first hinge 4 and the support of the second hinge 5, one end of the connecting rod body 3 is connected to the mouth frame of the pod through the first hinge 4, and the other end is connected through the The second hinge 5 is connected to the mouth cover 1; the first hinge 4 is set on the support of the first hinge 4, and the support of the first hinge 4 is set on the lower side of the mouth frame; the second hinge 5 is set on the support of the second hinge 5 On the upper side, the second hinge 5 support is arranged on one side of the mouth cover 1 near the top.

As shown in Figure 3, the stop and limit device includes a stop pin 10 and a limit card slot 11, the stop pin 10 is arranged on the support of the first hinge 4, and the limit card slot 11 is arranged on the connecting rod body 3 close to the mouth frame At one end, when the limit card slot 11 contacts the stop pin 10, the flap 1 stops moving. The stop limit device is used to prevent the connecting rod body 3 and the mouth cover 1 from colliding with the pod cabin body 2, causing damage to the structure and the surface paint layer.

In this embodiment, when the cover 1 is closed, the connecting rod body 3 is in the retracted state, and when the cover 1 is opened, the connecting rod body 3 is in the extended state, and the distance between the center of the cover 1 and the center of the frame can be moved by twice as much. The length of the connecting rod body 3 is large in travel stroke.

Specifically, a sealant layer 8 is used for sealing between the mouth cover 1 and the mouth frame, and the sealant layer 8 is cured on the mouth frame. The opening cover 1 is evenly provided with fixing screws around it, and the opening cover 1 and the sealant layer 8 are compressed by the fixing screws. Preferably, the four-thread captive screw 7 is used as the fixing screw. When the cover 1 is opened, the fixing screw, the cover 1 and the pod are all in a state of being inseparable, and they are not separated from the structural main body of the pod.

Preferably, as shown in FIG. 2 , grid-shaped reinforcing ribs 9 are provided on the inner side of the opening cover 1 .

More specifically:

There are mounting holes on the upper and lower sides of the cover 1, and screw holes are provided on the frame. The mounting holes on the cover 1 and the screw holes on the frame are processed in a matching way to ensure that the holes are aligned, and are connected by rivets. The supporting plate nut 6 is riveted on the mouth frame, and then the captive screw 7 is installed on the mouth cover 1 .

The support of the first hinge 4 is riveted to the lower positions on both sides of the mouth frame by rivets, and then the sealant is evenly applied to the sealing surface of the mouth frame, flattened, pressed and cured by a jig.

Install the mouth cover 1 on the mouth frame through the captive screws 7, and then install the connecting rod body 3 and the second hinge 5 support, and the second hinge 5 support is riveted on the mouth cover 1 through rivets, and the rivet holes are made by matching processing method.

Debug the first hinge 4 and the second hinge 5 to ensure that the flap 1 rotates flexibly when it is opened, and the outer edge of the flap 1 is flush with the periphery when it is closed.

As shown in Figure 4, the length a of the connecting rod body 3 and the distance c between the second hinge 5 and the upper edge of the flap 1 should meet the following two design requirements:

a) The maximum mouth surface height H after the opening cover 1 is opened should be greater than or equal to the height b of the opening frame, so as to ensure that the maintenance channel of the equipment is not blocked when the opening cover 1 is opened:

(1)

(1)

Wherein, β is the angle between the connecting rod body 3 and the mouth cover 1 after the mouth cover 1 is opened;

b) After the cover 1 is opened, the gap e between the connecting rod body 3 and the frame should be greater than or equal to the minimum safety gap e ₀ to ensure that there is no collision between the connecting rod body 3 and the frame when the cover 1 is opened:

(2)

(2)

Among them, d is the distance from the center of the second hinge 5 to the outer surface of the door cover 1, f is the width of the connecting rod body 3; the values of b, d, and f have been determined by the structure of the pod, and the formulas (1) and (2) It is possible to calculate and check the design value of the length a of the connecting rod body 3 and the distance c between the second hinge 5 and the upper edge of the flap 1, and determine the angle β between the connecting rod body 3 and the flap 1 after the flap 1 is opened. , and design the stop pin 10 and the limit card slot 11 based on this.

The above descriptions are only preferred embodiments of the present invention, and it should be understood that the present invention is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and Modifications can be made within the scope of the ideas described herein, by virtue of the above teachings or skill or knowledge in the relevant art. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all be within the protection scope of the appended claims of the present invention.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner" and "outer" are based on the attached The orientation or positional relationship shown in the figure, or the conventional orientation or positional relationship in the use of the present invention, is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific Orientation, construction and operation in a particular orientation, therefore should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or an optional connection. Detachable connection, or integral connection; can be mechanical connection, also can be electrical connection; can be wired connection, also can be wireless connection.

Claims (7)

1. A nacelle large-mouth-face quick-release maintenance mouth cover device is characterized by comprising a mouth cover, a pair of connecting rod devices and a pair of stop limiting devices;

the connecting rod device comprises a connecting rod body, a first hinge, a second hinge, a first hinge support and a second hinge support, one end of the connecting rod body is connected with a mouth frame of the nacelle through the first hinge, and the other end of the connecting rod body is connected with the mouth cover through the second hinge; the first hinge is arranged on the first hinge support, and the first hinge support is arranged below one side of the opening frame; the second hinge is arranged on the second hinge support, and the second hinge support is arranged above one side of the opening cover; when the cover is closed, the connecting rod body is in a retracted state, and when the cover is opened, the connecting rod body is in an extended state;

the stopping limiting device comprises a stopping pin and a limiting clamping groove, the stopping pin is arranged on the first hinge support, the limiting clamping groove is arranged at the end part of the connecting rod body close to one side of the opening frame, and the opening cover stops moving after the limiting clamping groove is in pin contact with the stopping pin, so that the connecting rod body and the opening cover are prevented from colliding with the nacelle body;

the length a of the connecting rod body and the distance c between the second hinge and the upper edge of the opening cover meet the following two design requirements:

a) The maximum mouth height H after the opening cover is opened is more than or equal to the height b of the mouth frame, so that the opening cover is ensured to be free of shielding for a maintenance channel of equipment when opened:

(1)

wherein beta is an included angle between the connecting rod body and the opening cover after the opening cover is opened;

b) After the opening cover is opened, the clearance e between the connecting rod body and the opening frame is more than or equal to the minimum safety clearance e ₀ To ensure that the connecting rod body and the mouth frame do not collide when the mouth cover is opened:

(2)

wherein d is the distance between the center of the second hinge and the outer surface of the opening cover, and f is the width of the connecting rod body; b. d and f are determined by the pod structure, the design values of the length a of the connecting rod body and the distance c between the second hinge and the upper edge of the flap can be calculated and checked through formulas (1) and (2), the included angle beta between the connecting rod body and the flap after the flap is opened is determined, and the stop pin and the limit clamping groove are designed according to the included angle beta.

2. The pod wide-mouth quick release maintenance flap arrangement as recited in claim 1, wherein said flap is sealed to said mouth frame with a layer of sealant, said layer of sealant being cured on said mouth frame.

3. The device of claim 2, wherein the cover is uniformly provided with fixing screws around the cover, and the cover and the sealant layer are pressed tightly by the fixing screws.

4. The device of claim 3, wherein the fixing screws are four-thread release screws, and in the open state of the flap, the fixing screws, the flap and the nacelle are in a release state and are not separated from the nacelle structural body.

5. The pod hatch arrangement according to claim 1, characterized in that a grid-like reinforcement structure is provided on the inside of the hatch.

6. The pod hatch arrangement according to claim 1, wherein said first hinge bracket is riveted to said hatch frame by rivets.

7. The pod hatch arrangement according to claim 1, wherein said second hinge mount is riveted to said hatch by rivets.

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