Metal skin pit eliminating tool

Abstract

The utility model relates to the technical field of aircraft maintenance, and discloses a metal skin pit eliminating tool which comprises a shell, one end of the shell extends to form a connecting column, the connecting column is configured to be in transmission connection with a pneumatic riveter, and a mounting groove and a conical hole which are communicated are sequentially formed in the shell in the direction away from the connecting column. The shell is further provided with a first through hole communicating with the mounting groove in the radial direction of the shell. The core claw comprises an installation part and a plurality of contraction parts distributed at intervals, the installation part is correspondingly arranged in the installation groove, a second through hole is formed in the installation part in the radial direction of the shell, an elastic sleeve and a shaft pin are sequentially installed in the second through hole, and the two ends of the shaft pin extend out of the second through hole to be installed in the first through hole of the shell; the other end of the contraction part extends out of the shell in the radial direction of the shell to form abutting parts, and elastic washers are arranged between the abutting parts and the shell. The tool disclosed by the utility model can be used for effectively repairing the pit of the metal skin, and meanwhile, the damage to the metal skin is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft maintenance, in particular to a tool for eliminating metal skin pits. Background Art

[0002] Aircraft metal skins will have pits due to various reasons. If the pits are within the allowable damage range, they can be filled or reshaped. There are currently two ways to reshape. One is to use pneumatic or manual hammers, wooden sticks and other percussion tools to reshape the metal skin surface by generating a force perpendicular to the metal skin surface to restore the depressed part, which has the disadvantage of easily causing damage to the metal skin; the other is to use electromagnetic pit elimination equipment, which uses the electromagnetic force generated by the equipment to pull the depressed part of the metal skin back to its original position, which has the disadvantage of easily causing the surface of the repaired metal skin to be not smooth enough. Utility Model Content

[0003] The utility model aims to provide a metal skin pit elimination tool, which can effectively repair the metal skin pit and avoid damage to the metal skin.

[0004] In order to achieve the above object, the utility model provides a metal skin pit elimination tool, comprising:

[0005] A shell, one end of which is extended to form a connecting column, the connecting column is configured to be drivingly connected to a pneumatic rivet gun, the shell has a mounting groove and a tapered hole connected in sequence in a direction away from the connecting column, and the shell also has a first through hole connected to the mounting groove in a radial direction of the shell; and

[0006] A core claw, comprising a mounting portion and a plurality of spaced contraction portions, wherein the mounting portion is correspondingly arranged in the mounting groove, a second through hole is provided on the mounting portion along the radial direction of the shell, an axle pin is installed in the second through hole, an elastic sleeve is arranged between the axle pin and the mounting portion, and the two ends of the axle pin extend out of the second through hole and are installed in the first through hole of the shell, the outer walls of the plurality of contraction portions are surrounded by a cone and are correspondingly arranged in the tapered hole, one end of the contraction portion is connected to the mounting portion, and the other end of the contraction portion extends out of the shell along the radial direction of the shell to form an abutment portion, and an elastic gasket is arranged between the plurality of abutment portions and the shell;

[0007] When the connecting column of the shell is subjected to an impact force along the axial direction of the shell, the shrinkage portion and the abutment portion shrink inwardly along the radial direction of the shell, and the abutment portion can eliminate the metal skin pit.

[0008] In some embodiments, a support body is further included to support the metal skin. The support body is arranged opposite to the abutting portion and is arranged on both sides of the metal skin.

[0009] In some embodiments, the support body is a top iron, and the top iron includes a support column and a support platform connected to the support column, and the support platform abuts against the metal skin and supports the metal skin.

[0010] In some embodiments, the top iron further includes an energy absorbing layer, which is disposed on the surface of the support platform and abuts against the metal skin, and the energy absorbing layer is a lead layer or a lead-tin alloy layer.

[0011] In some embodiments, the support body is formed by combining the shell and the core claw, and the connecting column is removed from one end of the shell.

[0012] In some embodiments, the elastic sleeve and the elastic gasket are both made of rubber, and the thickness of the elastic sleeve is equal to the thickness of the elastic gasket.

[0013] In some embodiments, eight contraction portions are provided, and the eight contraction portions are distributed in a circular array and are integrally formed with the mounting portion.

[0014] In some embodiments, the plurality of abutting portions are located on the same plane close to the bottom surface of the metal skin.

[0015] In some embodiments, the axis of the connecting column, the axis of the shell and the axis of the mounting portion coincide with each other.

[0016] In some embodiments, a buffer pad is further included, and the buffer pad is installed on the bottom surface of the abutment portion close to the metal skin.

[0017] The utility model provides a metal skin pit elimination tool, which has the following beneficial effects compared with the prior art:

[0018] The shell is provided with a mounting groove and a tapered hole, and the core claw includes a mounting portion and a plurality of spaced-apart contraction portions, wherein the mounting portion is correspondingly arranged in the mounting groove, and the outer walls of the plurality of contraction portions are surrounded by a cone and correspondingly arranged in the tapered hole, and the other end of the contraction portion extends outward from the shell along the radial direction of the shell to form an abutment portion, and when the connecting column of the shell is subjected to an impact force along the axial direction of the shell, the contraction portion and the abutment portion are contracted inward along the radial direction of the shell, and the abutment portion can effectively repair the metal skin pits during the process of eliminating the metal skin pits, thereby increasing the contraction force compared to the prior art and avoiding damage to the metal skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a metal skin pit elimination tool provided in an embodiment of the utility model.

[0020] Figure 2 A schematic diagram of the bottom view of the metal skin pit elimination tool provided in an embodiment of the utility model.

[0021] Figure 3 A schematic diagram of the exploded structure of a metal skin pit elimination tool provided in an embodiment of the utility model.

[0022] Figure 4 A schematic cross-sectional view of a support body configured for a metal skin pit elimination tool provided in an embodiment of the utility model.

[0023] Figure 5 A schematic cross-sectional diagram of the configuration of an energy absorbing layer on the support body of a metal skin pit elimination tool provided in an embodiment of the utility model.

[0024] Figure 6 A cross-sectional schematic diagram of a support body of a metal skin pit elimination tool provided in an embodiment of the utility model, which is composed of a shell and a core claw.

[0025] In the figure: 1. Shell; 11. Connecting column; 12. Mounting groove; 13. Conical hole; 14. First through hole; 2. Core claw; 21. Mounting portion; 22. Contraction portion; 23. Second through hole; 24. Elastic sleeve; 25. Axle pin; 26. Abutment portion; 27. Elastic washer; 28. Buffer pad; 3. Pneumatic rivet gun; 4. Support body; 41. Pillar; 42. Support platform; 43. Energy absorbing layer; 5. Metal skin. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with 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.

[0027] It should be understood that, in the description of the present application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0028] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figure 1-6 As shown, the metal skin pit elimination tool according to the embodiment of the utility model comprises a shell 1 and a core claw 2.

[0030] A connecting column 11 is extended from one end of the shell 1, and the connecting column 11 is configured to be drivingly connected to the pneumatic riveting gun 3. A connecting mounting groove 12 and a tapered hole 13 are sequentially formed in the shell 1 in a direction away from the connecting column 11. The shell 1 also has a first through hole 14 connected to the mounting groove 12 along the radial direction of the shell 1. In order to make the core claw 2 have a better repair effect on the metal skin 5, the pneumatic riveting gun 3 is configured to generate intermittent impact force, which is transmitted along the axial direction of the shell 1.

[0031] The core claw 2 includes a mounting portion 21 and a plurality of spaced contraction portions 22. The mounting portion 21 is correspondingly arranged in the mounting groove 12. A second through hole 23 is provided on the mounting portion 21 along the radial direction of the shell 1. An axle pin 25 is installed in the second through hole 23. An elastic sleeve 24 is arranged between the axle pin 25 and the mounting portion 21. Both ends of the axle pin 25 extend out of the second through hole 23 and are installed in the first through hole 14 of the shell 1. The outer walls of the plurality of contraction portions 22 are surrounded by a cone and are correspondingly arranged in the tapered hole 13. One end of the contraction portion 22 is connected to the mounting portion 21, and the other end of the contraction portion 22 extends out of the shell 1 along the radial direction of the shell 1 to form an abutment portion 26. An elastic gasket 27 is arranged between the plurality of abutment portions 26 and the shell 1.

[0032] In this embodiment, when the connection column 11 of the shell 1 is subjected to an impact force along the axial direction of the shell 1 , the shrinkage portion 22 and the abutment portion 26 shrink radially inwardly of the shell 1 , and the abutment portion 26 can eliminate the pits in the metal skin 5 .

[0033] During operation, the pneumatic riveting gun 3 generates intermittent impact force which is transmitted to the shell 1 through the connecting column 11. At this time, the elastic sleeve 24 and the elastic gasket 27 are compressed, so that the shell 1 squeezes the outer wall of the contraction portion 22, causing the abutment portion 26 to contract radially inwardly along the shell 1, and abuts the abutment portion 26 against the part of the metal skin 5 with the pit, driving the pit to contract, and finally achieving repair. The pneumatic riveting gun 3 generates intermittent impact force to switch the contraction portion 22 back and forth between the contraction and rebound states, so that the abutment portion 26 can cyclically repair the pit.

[0034] Based on the above structural setting, the pits in the metal skin can be effectively repaired while avoiding damage to the metal skin.

[0035] like Figure 4-6As shown, in one embodiment, the metal skin pit elimination tool further includes a support body 4 for supporting the metal skin 5, and the support body 4 is arranged opposite to the abutment portion 26 and is arranged on both sides of the metal skin 5. When the metal skin 5 is inconvenient to move, the repair is achieved by moving the support body 4 and the shell 1 to the working position, which is convenient for operation.

[0036] like Figure 4 As shown, in one embodiment, the support body 4 is a top iron, which includes a support column 41 and a support platform 42 connected to the support column 41, and the support platform 42 abuts against the metal skin 5 and supports the metal skin 5. When in use, the support column 41 is held to move the support body 4 to a working position.

[0037] like Figure 5 As shown, in one embodiment, the top iron further includes an energy absorbing layer 43, which is disposed on the surface of the support platform 42 and abuts against the metal skin 5, and the energy absorbing layer 43 is a lead layer or a lead-tin alloy layer. The lead layer or the lead-tin alloy layer has good ductility and can buffer energy absorption, thereby further reducing the damage to the metal skin 5 during the repair process.

[0038] like Figure 6 As shown, in one embodiment, the support body 4 is composed of a shell 1 and a core claw 2, and the connecting column 11 is removed from one end of the shell 1. In the above manner, both sides of the metal skin 5 can be subjected to the radial inward contraction force generated by the abutment portion 26 along the shell 1, thereby improving the efficiency of repair.

[0039] like Figure 3 As shown, in one embodiment, the elastic sleeve 24 and the elastic washer 27 are both made of rubber, and the thickness of the elastic sleeve 24 is equal to the thickness of the elastic washer 27. When the housing 1 is subjected to force, the displacement distance of the mounting portion 21 relative to the shaft pin 25 is consistent with the displacement distance of the abutment portion 26 relative to the housing 1, thereby maintaining the overall structure of the core claw 2 stable.

[0040] Exemplarily, eight contraction portions 22 are provided, and the eight contraction portions 22 are distributed in a ring array and are integrally formed with the mounting portion 21. The contraction portions 22 can be uniformly squeezed and deformed by the housing 1, and contract inwardly along the radial direction of the housing 1.

[0041] Specifically, the bottom surface of the plurality of abutting portions 26 close to the metal skin 5 is located on the same plane, so as to ensure that the metal skin 5 can be flat when the repair is completed.

[0042] In one embodiment, the axis of the connecting column 11, the axis of the housing 1 and the axis of the mounting portion 21 coincide with each other, thereby ensuring that the overall structure is stable when the pneumatic riveting gun 3 applies intermittent impact force to the connecting column 11.

[0043] like Figure 3As shown, in one embodiment, the core claw 2 further includes a buffer pad 28, which is installed on the bottom surface of the abutment portion 26 close to the metal skin 5. The buffer pad 28 is made of rubber or plastic material, has elasticity, and can further reduce damage to the metal skin 5 during the repair process.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A metal skin pit elimination tool, characterized in that: include: A shell, one end of which is extended to form a connecting column, the connecting column is configured to be drivingly connected to a pneumatic rivet gun, the shell has a mounting groove and a tapered hole connected in sequence in a direction away from the connecting column, and the shell also has a first through hole connected to the mounting groove in a radial direction of the shell; and A core claw, comprising a mounting portion and a plurality of spaced contraction portions, wherein the mounting portion is correspondingly arranged in the mounting groove, a second through hole is provided on the mounting portion along the radial direction of the shell, an axle pin is installed in the second through hole, an elastic sleeve is arranged between the axle pin and the mounting portion, and the two ends of the axle pin extend out of the second through hole and are installed in the first through hole of the shell, the outer walls of the plurality of contraction portions are surrounded by a cone and are correspondingly arranged in the tapered hole, one end of the contraction portion is connected to the mounting portion, and the other end of the contraction portion extends out of the shell along the radial direction of the shell to form an abutment portion, and an elastic gasket is arranged between the plurality of abutment portions and the shell; When the connecting column of the shell is subjected to an impact force along the axial direction of the shell, the shrinkage portion and the abutment portion shrink inwardly along the radial direction of the shell, and the abutment portion can eliminate the metal skin pit.

2. The metal skin pit elimination tool according to claim 1, characterized in that: It also includes a supporting body for supporting the metal skin, wherein the supporting body is arranged opposite to the abutting portion and is arranged on both sides of the metal skin.

3. The metal skin pit elimination tool according to claim 2, characterized in that: The support body adopts a top iron, and the top iron includes a support column and a support platform connected to the support column, and the support platform abuts against the metal skin and supports the metal skin.

4. The metal skin pit elimination tool according to claim 3, characterized in that: The top iron also includes an energy absorbing layer, which is arranged on the surface of the support platform and abuts against the metal skin, and the energy absorbing layer is a lead layer or a lead-tin alloy layer.

5. The metal skin pit elimination tool according to claim 2, characterized in that: The support body is formed by combining the shell and the core claw, and the connecting column is removed from one end of the shell.

6. The metal skin pit elimination tool according to claim 1, characterized in that: The elastic sleeve and the elastic gasket are both made of rubber, and the thickness of the elastic sleeve is equal to the thickness of the elastic gasket.

7. The metal skin pit elimination tool according to claim 1, characterized in that: There are eight contraction portions, which are distributed in a ring array and are integrally formed with the mounting portion.

8. The metal skin pit elimination tool according to claim 1, characterized in that: The plurality of abutment portions are located on the same plane close to the bottom surface of the metal skin.

9. The metal skin pit elimination tool according to claim 1, characterized in that: The axis center of the connecting column, the axis center of the housing and the axis center of the mounting portion coincide with each other.

10. The metal skin pit elimination tool according to any one of claims 1 to 9, characterized in that: It also includes a buffer pad, which is installed on the bottom surface of the abutment portion close to the metal skin.

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