CN116006565A

CN116006565A - Embedded flaring supporting plate self-locking nut structure

Info

Publication number: CN116006565A
Application number: CN202211666237.4A
Authority: CN
Inventors: 肖松松; 李永华; 朱永红; 冯朗星
Original assignee: Guizhou Hangrui Aviation Precision Parts Manufacturing Co ltd
Current assignee: Guizhou Hangrui Aviation Precision Parts Manufacturing Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-04-25

Abstract

The utility model relates to a fastener technical field specifically discloses an embedded flaring layer board self-locking nut structure, and it includes flaring section, binding off section, layer board, embedding section, utilizes the protruding tooth structure of embedding section to make the inner wall deformation of base member mounting hole to the base member inlays with the embedding section together, plays fixed rotation, the function of pine takes off, and it makes the nut wholly fixed on the base member to expand the riveting to the flaring section, utilizes the deformation of binding off section to realize the function of auto-lock. The problem that current nut processing degree of difficulty is big, mounting condition is harsh, and the risk of coming off is high has been solved to this scheme.

Description

Embedded flaring supporting plate self-locking nut structure

Technical Field

The invention relates to the technical field of fasteners, in particular to an embedded flaring supporting plate self-locking nut structure.

Background

In order to prevent the phenomenon, the self-locking nut is invented. The self-locking nut has the functions of locking and vibration resistance and is used for special occasions. When the materials of the aerospace fastener are selected, the performances of specific strength, fatigue resistance, corrosion resistance, rigidity, brittleness, compatibility, heat resistance and the like are important indexes, and along with the development of self-locking products, the installation and use reliability of the self-locking nut are required to be higher.

At present, the self-locking nut of the flaring supporting plate is composed of a flaring section, a supporting plate and a closing section, wherein the supporting plate is of a non-circular structure (shown in figures 1 and 2). The self-locking nut of the flaring supporting plate is used in the following way: after the flaring section stretches into the mounting hole, the flaring section is pressed and deformed on the surface of the base body by using external force, and the axial fixation of the nut is realized through the limit between the flaring section and the supporting plate, so that the nut is prevented from falling off; the supporting plate is cut flat on one side or two sides, and the cut plane is abutted against a step of the base body or the whole supporting plate is arranged in the ring groove of the base body, so that the whole anti-rotation function of the nut in the installation process is realized; self-locking is realized by flattening the closing-in section to form a self-locking structure.

The structure has the following defects in actual use: (1) The structural size of the nut is large, the processing is relatively complex, and milling is needed; (2) The nut is large in installation occupation space, wide in flange width of a matrix (casing) and harsh in installation conditions, the single-sided flat cutting nut can only be suitable for the matrix (casing) with steps on the inner ring and proper distances, and the double-sided flat cutting nut can only be suitable for the installation of the position with the annular groove machined on the annular flange of the matrix (casing), so that the structural size of the matrix is large, the machining difficulty is high, the size of the matrix (casing) is not reduced, and the weight of an aviation structural member is reduced; (3) The nut is prevented from falling off by the flaring of the flaring section, so that the risk of falling off the nut is high.

Disclosure of Invention

The invention provides an embedded flaring supporting plate self-locking nut structure which overcomes the defects in the prior art.

In order to solve the above-mentioned purpose, the invention adopts the following technical scheme: the utility model provides an embedded flaring layer board auto-lock nut structure, includes flaring section, layer board, binding off section, the nut is flaring section, layer board, binding off section from top to bottom in proper order, be equipped with the embedding section between flaring section and the layer board, the embedding section includes the dogtooth that distributes along flaring section circumference, the external diameter of dogtooth is greater than flaring section external diameter, and the addendum circle diameter of dogtooth is less than the external diameter of layer board.

The basic principle of the scheme is as follows: when the nut is used, the embedded section of the nut is pulled and embedded into the base body, the strength of the embedded section is slightly higher than that of the base body, so that the convex teeth of the embedded section are embedded with the inner wall of the hole of the base body, then the flaring section is flared, and the nut is fixed on the base body by the lengths of the supporting plate and the flaring section in the axial direction (the installation schematic diagram is shown in figure 5), so that the functions of fixing, rotation preventing and loosening preventing are achieved.

The beneficial effect of this scheme is:

1. the existing nut is large in structural size and relatively complex in machining, milling is needed, machining of the nut can be achieved through rotary equipment, the procedure of milling the appearance of the supporting plate is omitted, the machining process is simplified, and machining difficulty is reduced.

2. The existing nut is large in occupied space and severe in installation condition, after the nut is adopted, the installation holes on the base body can be installed only by round holes, grooves are not required to be milled according to the appearance of the supporting plate, and therefore the machining process of the installation holes is simplified, and the machining difficulty is reduced.

3. The existing nut is higher in falling risk, the flat structure is replaced by adopting the mode of embedding the convex teeth of the embedded section into the matrix, so that the effect of preventing the nut from rotating is achieved, after the embedded section of the nut is embedded into the matrix, the nut can be prevented from rotating and can be prevented from axially sliding, the nut can be effectively prevented from falling, the function of the nut is consistent with that of the flaring section after riveting, and the nut can be more effectively prevented from falling.

Further, the outer wall of the convex tooth is provided with straight knurling stripes. The friction force between the nut and the inner wall of the opening of the matrix is increased by the straight knurl stripes, the contact area between the nut and the inner wall of the opening of the matrix is increased, the straight knurl stripes are convenient to be embedded, and the functions of fixing, preventing rotation and loosening are achieved.

Further, the closing-in section is divided into two parts along the axial direction of the closing-in section, and the diameter of one end, close to the supporting plate, of the closing-in section is larger than that of one end, far away from the supporting plate. The nut closing-in position is conveniently positioned and extruded in the follow-up process.

Further, the outer edge of the supporting plate is round. The supporting plate has the functions of supporting and limiting, the shape of the supporting plate is changed into a circular structure, the outer diameter of the supporting plate is reduced, and the supporting plate can be installed on a smaller base body (a casing), so that the weight of an aviation structural member is reduced.

Further, the flaring section, the supporting plate, the embedding section and the closing section are all coaxially arranged. Easy to accurately place and position.

Further, an inclined plane is adopted to be transited between the flaring section and the embedding section. The inclined plane transition is adopted to facilitate the embedded section to enter the mounting hole on the substrate.

Drawings

FIG. 1 is a cross-sectional view of a prior art nut;

FIG. 2 is a top view of a prior art nut;

FIG. 3 is a schematic diagram of embodiment 1 of the present invention;

FIG. 4 is a top view of examples 1 to 3 of the present invention;

FIG. 5 is a schematic diagram of embodiment 2 of the present invention;

FIG. 6 is a schematic diagram of embodiment 3 of the present invention;

fig. 7 is an installation schematic of embodiment 1 of the present invention.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the device comprises a flaring section 1, a supporting plate 2, a closing-in section 3, an embedding section 4, a hinging part 5, a clamping strip 6, a first channel 7 and a clamping block 8.

Example 1:

example 1 is substantially as shown in fig. 3, 4 and 7:

as shown in fig. 3, the embodiment is axially and horizontally placed, four parts of an integrally formed flaring section 1, an embedding section 4, a supporting plate 2 and a closing section 3 are respectively processed from left to right, the diameter of the supporting plate 2 is the largest, the annular embedding section 4 is sleeved outside the flaring section 1, straight knurls parallel to the axial direction are machined on the circumference of the embedding section 4, and the straight knurl structure is shown in fig. 4. The diameters of the two parts from left to right on the closing-in section 3 are gradually reduced, the wall thickness is thinned, and a thinner section is flattened to form a self-locking structure during subsequent installation to realize the locking of the bolt and the nut.

The specific implementation process is as follows:

as shown in fig. 5, the flaring section 1 of the nut is aligned with the mounting hole on the base body and pushed in by using a special tool, the straight knurling on the embedding section 4 extrudes the base body, the inner wall of the base body deforms, the nut is embedded with the base body, the flaring section 1 is aligned with the special tool for flaring and riveting, the supporting plate 2 and the riveting part integrally fix the nut on the base plate, the closing section 3 is pressed after the bolt is penetrated, and the closing section 3 deforms to self-lock the bolt and the nut.

Example 2:

example 2 is substantially as shown in figures 5 and 7:

the difference between this embodiment and embodiment 1 lies in the structure of the closing-in section 3, as shown in fig. 5, the opening of the closing-in section 3 is hinged with an L-shaped clamping block 8, the vertical section of the clamping block 8 extends to the front of the opening, when the screw is installed in the nut of this embodiment, the screw gradually advances from left to right, the screw abuts against the vertical section of the clamping block 8, thereby driving the clamping block 8 to rotate along the hinge point, the horizontal section of the clamping block 8 moves towards the side wall of the closing-in section 3 and abuts against the side wall of the closing-in section 3, along with the gradual advance of the screw, the rotation angle of the clamping block 8 increases, the horizontal section of the clamping block 8 makes the side wall of the closing-in section 3 concave towards the axis, thereby increasing the friction force between the screw and the inner wall of the closing-in section 3, and the screw closely contacts with the inner wall of the closing-in section 3, thereby achieving the self-locking effect.

Example 3:

example 3 is substantially as shown in figures 6 and 7:

the difference between this embodiment and embodiment 2 lies in the structure of the closing-in section 3, as shown in fig. 6, the closing-in section 3 is provided with a first channel 7 penetrating through the side wall, the opening of the closing-in section 3 is hinged with an arc-shaped clamping strip 6, one end of the clamping strip 6 extends to the opening of the shrinking section, the other end of the clamping strip 6 extends to the first channel 7, after the screw is installed in the nut, the screw abuts against the arc-shaped clamping strip 6, the clamping strip 6 in the channel moves towards the outer wall of the nut, along with the advancing of the screw, the clamping strip 6 abuts against the screw under the extrusion effect and extrudes into the screw, and the clamping strips 6 symmetrically arranged at two sides of the screw tightly clamp the nut from two ends, so that the nut is locked.

The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. The utility model provides an embedded flaring layer board auto-lock nut structure, includes flaring section, layer board, binding off section, its characterized in that: the nut is from last flaring section, layer board, binding off section down in proper order, be equipped with annular embedded section between flaring section and the layer board, embedded section includes the dogtooth of following flaring section circumference distribution, the external diameter of dogtooth is greater than flaring section external diameter, and the addendum circle diameter of dogtooth is less than the external diameter of layer board.

2. The embedded flaring pallet self-locking nut structure of claim 1, characterized in that: the side wall of the closing-in section is hinged with an L-shaped clamping block, the vertical section of the clamping block extends to the opening of the closing-in section, and the horizontal section of the clamping block can be attached to the side wall of the closing-in section.

3. The embedded flaring pallet self-locking nut structure of claim 1, characterized in that: the side wall of the closing-in section is clamped with a first channel penetrating through the side wall, the side wall of the closing-in section is hinged with an arc clamping strip, one end of the clamping strip extends to an opening of the closing-in section, and the other end of the clamping strip extends into the first channel and is connected with the first channel in a sliding mode.

4. The embedded flaring pallet self-locking nut structure of claim 1, characterized in that: the outer wall of the convex tooth is provided with straight knurling stripes.

5. The embedded flaring pallet self-locking nut structure of claim 1, characterized in that: the closing-in section is divided into two parts along the axial direction of the closing-in section, and the diameter of one end, close to the supporting plate, of the closing-in section is larger than that of one end, far away from the supporting plate.

6. The embedded flaring pallet self-locking nut structure of claim 1, characterized in that: the outer edge of the supporting plate is round.

7. The embedded flaring pallet self-locking nut structure of claim 1, characterized in that: the flaring section, the supporting plate, the embedding section and the closing section are all coaxially arranged.

8. The embedded flaring pallet self-locking nut structure of claim 1, characterized in that: and the flaring section and the embedding section adopt inclined plane transition.