Adjustable positioning device for positioning helicopter skin

By designing an adjustable positioning device, using thread fit and guide structure, the positioning problem caused by poor edge forming accuracy of composite skin is solved, and effective positioning and support of composite skin is achieved.

CN223161987UActive Publication Date: 2025-07-29CHANGHE AIRCRAFT INDUSTRIES CORPORATION
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Patent Information

Application Number
CN202422257726.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-14
Publication Date
2025-07-29
Estimated Expiration
2034-09-14

AI Technical Summary

Technical Problem

In the prior art, the molding accuracy of the skin edge of the composite material is poor, resulting in the problem of interference or failure to fit the tool positioning part with the skin edge.

Method used

An adjustable positioning device is designed, including a base, a positioning screw, an adjustment nut and a T-key. Through threaded fit and guide structure, auxiliary positioning and support of composite skin is achieved.

Benefits of technology

It improves the positioning and support of composite skins, has a simple structure and is convenient to operate, and is suitable for the positioning needs of composite skins.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the field of helicopter process equipment design, and particularly relates to an adjustable positioning device for positioning a helicopter skin. The adjustable positioning device comprises a base, a positioning screw rod, an adjusting nut and a T-shaped key; the adjusting nut is composed of an operation ring structure, a connecting section and a limiting ring structure. The base comprises a bottom plate and a sleeve structure with a semicircular groove in the top; a through hole is formed in the center of the sleeve; a T-shaped key mounting hole is formed in the side wall; the limiting ring structure is installed in the semi-annular groove and matched with the semi-annular groove. The positioning screw rod, a central threaded hole of the adjusting nut and a through hole formed in the sleeve are matched; the positioning screw rod is in threaded fit with the central thread and is in shaft hole fit with the through hole; the positioning screw is provided with a matching groove along the axial direction; and the matching groove is matched with a T-shaped key inserted into the T-shaped key mounting hole to prevent the positioning screw rod from rotating in the circumferential direction.
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Description

Technical Field

[0001] The utility model belongs to the field of helicopter process equipment design, and particularly relates to an adjustable positioning device for helicopter skin positioning. Background Art

[0002] Most helicopter skins are formed by composite materials. Due to the poor forming accuracy of the edges of composite skins, the edge dimensions of each composite skin are inconsistent. For places that need to use the edges of composite skins for positioning, if a fixed-structure tooling positioning part is directly used for positioning, due to the existence of edge errors of composite skins, it is easy to cause interference or non-contact between the tooling positioning part and the edge of the composite skin. Content of the Utility Model

[0003] Purpose of the utility model: To provide an adjustable positioning device for helicopter skin positioning, which is used to replace the original fixed tooling positioning part. By combining with other tooling positioning structures, this device can effectively assist in positioning and supporting the composite skin, thereby improving the positioning and supporting conditions of the composite skin.

[0004] Technical Solution

[0005] Provide an adjustable positioning device for helicopter skin positioning, including: a base, a positioning screw, an adjusting nut, and a T-shaped key;

[0006] The adjusting nut is composed of an operation ring structure, a connecting section, and a limiting ring structure;

[0007] The base includes a bottom plate and a sleeve structure with a semi-circular groove at the top; a through hole is opened in the center of the sleeve, and a T-shaped key installation hole is opened on the side wall;

[0008] The limiting ring structure is installed in the semi-circular groove, and the limiting ring structure cooperates with the semi-circular groove; the through hole opened in the sleeve, the central threaded hole of the positioning screw and the adjusting nut are in cooperation with each other;

[0009] The positioning screw is in threaded cooperation with the central thread, and the positioning screw is in shaft-hole cooperation with the through hole;

[0010] The positioning screw is provided with a mating groove along the axial direction; the mating groove cooperates with the T-shaped key inserted into the T-shaped key installation hole to prevent the circumferential rotation of the positioning screw.

[0011] Further, the through hole opened in the center of the sleeve is a cylindrical through hole with precision requirements for installing the positioning screw.

[0012] Further, the top of the positioning screw is a positioning plate for abutting against the composite skin; the rod part is a cylindrical screw with precision requirements for cooperating with the base and the adjusting nut.

[0013] Further, the T-shaped key is a navigation mark part HB1864, which is used for guiding the positioning screw to prevent the positioning screw from rotating on the base.

[0014] Further, the central threaded hole adopts trapezoidal threads for easy transmission.

[0015] Further, one fixed installation hole of this device is provided at each of the four corners of the bottom plate.

[0016] Beneficial effects:

[0017] The adjustable positioning device has a simple structure and is easy to operate. By combining with other tooling positioning structures, it can effectively assist in positioning and supporting the composite skin, thereby improving the positioning and supporting conditions of the composite skin. Description of the drawings

[0018] Figure 1 is an adjustable positioning device with a guiding structure of the present utility model, wherein: 1 - base, 2 - positioning screw, 3 - adjusting nut, 4 - T-shaped key.

[0019] Figure 2 is a schematic structural view of the base of the present utility model.

[0020] Figure 3 is a schematic structural view of the positioning screw of the present utility model.

[0021] Figure 4 is a schematic structural view of the adjusting nut of the present utility model. Detailed implementation manners

[0022] In view of the edge forming characteristics of the composite skin, the present utility model designs an adjustable positioning device for helicopter skin positioning. This device can be combined with other tooling positioning structures to assist in positioning the composite skin.

[0023] The present utility model provides an adjustable positioning device for helicopter skin positioning, as Figure 1 shown. The main structural components of this device include a base 1, a positioning screw 2, an adjusting nut 3, and a T-shaped key 4.

[0024] The base is as Figure 2 shown, with 4 fixed installation holes of this device at the bottom, a T-shaped key installation hole in the middle, and an annular groove structure at the top for placing the adjusting nut.

[0025] The annular groove of the base can limit the up and down movement of the adjusting nut, and the semi-annular structure is set to facilitate the removal of the adjusting nut.

[0026] The through hole of the base is a cylindrical through hole with precision requirements for installing the positioning screw.

[0027] The positioning screw is asFigure 3 As shown, one side of the positioning screw is a positioning plate for abutting against the composite skin, and the other side is a cylindrical screw with precision requirements for mating with the base and the adjusting nut.

[0028] A slot is provided on the screw of the positioning screw, and the size of the slot has precision requirements for mating with the T-shaped key to play a guiding role.

[0029] The adjusting nut is as Figure 4 As shown, one end of it is a limit ring structure for mating with the annular groove of the base to prevent the adjusting nut from disengaging from the base during rotation.

[0030] The middle of the adjusting nut is an internal thread structure, and the thread specification is the same as the external thread specification of the positioning screw, and generally trapezoidal threads are used for transmission.

[0031] The T-shaped key is a navigation standard part HB1864 for guiding the positioning screw to prevent the positioning screw from rotating on the base.

[0032] Since the utility model is an adjustable structure, it is not used as a separate positioning device. Therefore, it needs to be used in combination with other tooling positioning structures, and this device is used as an auxiliary positioning support. During use, it is arranged according to the places where the helicopter composite skin needs auxiliary positioning support. According to the actual size of the edge of the composite skin, rotate the adjusting nut of this device to adjust the positioning surface of the positioning screw of this device to abut against the edge of the composite skin, that is, complete the auxiliary positioning support operation of this device for the composite skin.

Claims

1. An adjustable positioning device for helicopter skin positioning, characterized in that, Comprising: A base, a positioning screw, an adjusting nut, and a T-shaped key; The adjusting nut consists of an operating ring structure, a connecting section, and a limiting ring structure; The base includes a bottom plate and a sleeve structure with a semi-circular groove at the top; a through hole is provided in the center of the sleeve, and a T-shaped key mounting hole is provided on the side wall; The limiting ring structure is installed in the semi-circular groove, and the limiting ring structure cooperates with the semi-circular groove; the positioning screw, the central threaded hole of the adjusting nut, and the through hole provided in the sleeve cooperate with each other; The positioning screw is in threaded fit with the central thread, and the positioning screw is in shaft-hole fit with the through hole; The positioning screw is provided with a mating groove along the axial direction; the mating groove cooperates with the T-shaped key inserted into the T-shaped key mounting hole to prevent the positioning screw from rotating circumferentially.

2. The adjustable positioning device according to claim 1, wherein The through hole provided in the center of the sleeve is a cylindrical through hole with precision requirements for installing the positioning screw.

3. The adjustable positioning device according to claim 1, characterized in that, The top of the positioning screw is a positioning plate for abutting against the composite skin; the rod part is a cylindrical screw with precision requirements for cooperating with the base and the adjusting nut.

4. The adjustable positioning device according to claim 1, characterized in that, The T-shaped key is a navigation standard part HB1864 for guiding the positioning screw to prevent the positioning screw from rotating on the base.

5. The adjustable positioning device according to claim 1, wherein The central threaded hole adopts a trapezoidal thread for easy transmission.

6. The adjustable positioning device according to claim 1, wherein One fixed mounting hole of this device is provided at each of the four corners of the bottom plate.