CN213117057U - Vulcanize flap glue film thickness control bolt - Google Patents

Abstract

The utility model relates to a rubber coating thickness control bolt, especially a sealed glue coated thickness control bolt between frame and the flap on the aircraft. A thickness control bolt for a glue layer of a vulcanization opening cover is characterized in that the bolt sequentially comprises a threaded part I, a thickness control part, a threaded part II and a tightening part along the axial direction of the bolt; screw thread portion I and the connecting piece mounting hole adaptation on the mouth frame, thickness control portion radial dimension is greater than connecting piece mounting hole aperture, and its thickness is unanimous with the thickness of design glue film coating, screw thread portion II pass the flap and with the nut spiro union, screw up the tip that the portion is located screw thread portion II, screw up the connecting portion of bolt as external force. The utility model has the advantages of as follows: 1. the integrated molding has simple structure. 2. Simple and convenient use and good operation effect. 3. The thickness of the glue layer can be controlled in the gluing process of the sealing opening cover, excessive glue entering into the mounting hole of the opening frame connecting piece is avoided, and the gluing efficiency and the gluing quality of the opening cover are improved.

Description

Vulcanize flap glue film thickness control bolt

Technical Field

The utility model relates to a rubber coating thickness control bolt, especially a sealed glue coated thickness control bolt between frame and the flap on the aircraft.

Background

The detachable cover is arranged on the outer surface of the aircraft and used for observing and maintaining accessories in the aircraft body, and a sealing gasket is required to be additionally arranged between the cover and the opening frame to realize the rainproof, dustproof or sealing functions of the cover. In the process of installing the cover cap, the form that the opening frame is coated with the sealant and the rubber pad is replaced after vulcanization is adopted, so that the functions of rain prevention, dust prevention or sealing of the cover cap are realized.

The step difference is formed between the covering cap and the outer surface of the aircraft body when the sealant is coated on the opening frame too thickly or too thinly, so that the airflow on the outer surface of the high-speed aircraft is influenced. The other frame is provided with a connecting piece mounting hole, and when the sealant is coated, the risk of forming redundant materials in the sealant inlet hole exists, so that the functionality of accessories in the aircraft is lost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control vulcanizes flap rubber coating thickness for behind the installation flap, the flap jump satisfies the designing requirement, and can keep away from the downthehole surplus vulcanization flap glue film thickness control bolt of frame.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a thickness control bolt for a glue layer of a vulcanization opening cover is characterized in that the bolt sequentially comprises a threaded part I, a thickness control part, a threaded part II and a tightening part along the axial direction of the bolt; screw thread portion I and the connecting piece mounting hole adaptation on the mouth frame, thickness control portion radial dimension is greater than connecting piece mounting hole aperture, and its thickness is unanimous with the thickness of design glue film coating, screw thread portion II pass the flap and with the nut spiro union, screw up the tip that the portion is located screw thread portion II, screw up the connecting portion of bolt as external force.

Preferably, the axes of the screw part I, the thickness control part and the screw part II are on the same axis.

Preferably, the bolt is integrally formed.

Preferably, the tightening part is a straight or cross-shaped notch.

Compared with the prior art, the utility model has the advantages of as follows:

1. the integrated molding has simple structure.

2. Simple and convenient use and good operation effect.

3. The thickness of the glue layer can be controlled in the gluing process of the sealing opening cover, excessive glue entering into the mounting hole of the opening frame connecting piece is avoided, and the gluing efficiency and the gluing quality of the opening cover are improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a length schematic of FIG. 1;

FIG. 4 is a schematic structural view of the embodiment of the present invention in which bolts are installed on the mouth frame;

FIG. 5 is a schematic view of the embodiment of the present invention showing the cap pressed into the cap of FIG. 4;

in the figure, 1-1, thread part II; 1-2, a thickness control part; 1-3, a thread part I; 1-4, a notch; 1-5, a mouth frame; l1, total bolt length; l2, thickness control part thickness.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings 1-5: a thickness control bolt for a glue layer of a vulcanization port cover is shown in a figure 1-2, and comprises a threaded part I1-3, a thickness control part 1-2, a threaded part II 1-1 and a notch 1-4 in sequence along the axial direction of the bolt; the screw thread portion I1-3 is matched with a connecting piece mounting hole in the opening frame 1-5, the radial size of the thickness control portion 1-2 is slightly larger than the aperture of the connecting piece mounting hole, so that after the screw thread portion I1-3 is screwed into the connecting piece mounting hole, the thickness control portion can completely shield the connecting piece mounting hole, the thickness of the connecting piece mounting hole is consistent with the thickness of a design glue layer, the screw thread portion II 1-1 penetrates through the opening cover and is in threaded connection with the nut, the notch 1-4 is in a straight line shape and is located at the end portion of the screw thread portion II and serves as a connecting portion.

The bolt is equivalent to an integral bolt combined with the gasket, is convenient to operate, improves the working efficiency and is easy to disassemble.

As shown in fig. 3, the total length of the bolt is L1, which is designed according to the thickness of the specific interlayer (i.e. after the flap is pressed into the opening frame), and the L2 size can be calculated by combining the designed thickness of the reserved glue layer, the vulcanization shrinkage rate of the sealant, and the compression rate of the glue layer.

The use process comprises the following steps:

firstly, the bolts are installed and fastened on all connecting piece mounting holes of the opening frame through the notches 1-4 on the bolts, so that the middle 1-2 of the bolts are completely attached to the opening frame, as shown in figure 4;

cleaning the surface of the mouth frame, coating the sealant on the surface of the mouth frame, and shaping to form a continuous film layer;

and step three, coating a release agent (such as lubricating grease) on the inner surface of the opening cover, pressing the opening cover into the opening frame, installing a nut to press the opening cover, and extruding the redundant sealant until the contact between the opening cover and the sealing cover reaches 1-2, as shown in figure 5.

And step four, after the sealant on the opening frame is vulcanized, the opening cover is disassembled, the bolt is screwed out, and the sealant layer meeting the requirement of the vulcanized opening cover step is realized.

The above embodiments are merely preferred embodiments of the present invention, and do not limit the present invention. The number, specification and appearance of the bolts need to be adjusted according to actual conditions. It will be understood by those skilled in the art that any extension, modification or the like made without departing from the spirit of the present invention shall be included in the protection scope of the present invention.

Claims (4)

1. The utility model provides a vulcanize flap glue film thickness control bolt which characterized in that: the bolt is sequentially provided with a threaded part I, a thickness control part, a threaded part II and a tightening part along the axial direction of the bolt; screw thread portion I and the connecting piece mounting hole adaptation on the mouth frame, thickness control portion radial dimension is greater than connecting piece mounting hole aperture, and its thickness is unanimous with the thickness of design glue film coating, screw thread portion II pass the flap and with the nut spiro union, screw up the tip that the portion is located screw thread portion II, screw up the connecting portion of bolt as external force.

2. The vulcanization port cover glue thickness control bolt of claim 1, wherein: the axes of the thread part I, the thickness control part and the thread part II are on the same axis.

3. The vulcanization port cover glue thickness control bolt of claim 1, wherein: the bolt is integrally formed.

4. The vulcanization port cover glue thickness control bolt of claim 1, wherein: the tightening part is a straight or cross notch.

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