Aircraft skin air flap opening pin dismounting tool

Abstract

The utility model provides a kind of dismounting tool for aircraft skin air flap split pin, belong to special part separation tool field;The tool is used to solve the problem that split pin is bent, expanded or deformed when dismounting aircraft skin air flap split pin due to narrow operating space, obstructed vision;Tool includes press, pedestal, bracket and pressure shaft;The pedestal is installed on the workbench of press, and the top surface is provided with the first positioning slot of positioning universal joint and the first shaft hole of intercommunication containing cavity;Bracket is used to position support skin air flap;Pressure shaft is coaxially arranged above split pin, and press drives pressure shaft to press against split pin vertically;Through pedestal positioning and coaxial force of pressure shaft, realize split pin accurate dismounting, avoid damage;The tool dismounting process is safe and reliable, high efficiency, improve maintenance quality.

Description

Technical Field

[0001] This utility model relates to the field of tools for separating special parts, specifically to a disassembly tool for the cotter pin of an aircraft skin air valve. Background Technology

[0002] Aircraft skin air valves are installed on the fuselage skin to control and regulate airflow. A universal joint mechanism is installed on the skin air valve, which transmits the driving force output by the actuator to the air valve body, enabling the air valve to perform corresponding opening and closing actions. Cotter pins are typically used for connection and fixation between the universal joint and the actuator, and between the universal joint and the air valve housing.

[0003] However, the cotter pin has a small structural size, with a peach-shaped head and a forked tail. Due to its size and the space available for installation, disassembly often presents challenges such as limited operating space and obstructed vision. Furthermore, because of its low rigidity, improper disassembly methods or tools can easily lead to bending, expansion, or localized deformation. Once the cotter pin is deformed, it becomes difficult to remove or reinstall effectively, and in severe cases, it may even prevent the skin air valve from functioning properly, thus affecting the reliable operation of the system. Utility Model Content

[0004] The purpose of this utility model is to provide a disassembly fixture for the cotter pin of an aircraft skin air valve. The fixture includes a press, a base, a bracket, and a pressure shaft. The base positions a universal joint, and the pressure shaft coaxially presses against the cotter pin to achieve precise disassembly. This solves the technical problem in the prior art where the cotter pin is easily bent, expanded, or locally deformed due to narrow operating space and obstructed vision when disassembling the cotter pin of an aircraft skin air valve. The result is a safe, reliable, and efficient disassembly process that avoids damage to the cotter pin and improves maintenance quality.

[0005] To achieve the aforementioned objectives, the technical solution adopted by this utility model is as follows: A disassembly tool for the cotter pin of an aircraft skin air valve includes a press, a base, a bracket, and a pressure shaft; The base is installed on the worktable of the press. The base has a receiving cavity inside. The top surface of the base has a first positioning groove for positioning the universal joint. The top surface of the base also has a first shaft hole that communicates with the receiving cavity. The first shaft hole is coaxially arranged below the cotter pin. The bracket is used to position and support the skin air valve, and to support the universal joint on the skin air valve on the upper surface of the base. The pressure shaft is coaxially positioned above the cotter pin. The top end of the pressure shaft is used to abut against the pressure head of the press, and the bottom end is used to press against the cotter pin.

[0006] Preferably, the receiving cavity is provided with an elastic push rod, the top end of which extends out of the first shaft hole and elastically expands and contracts along the axial direction of the first shaft hole under elastic action.

[0007] Preferably, the elastic push rod includes a push rod and a compression spring; The top rod is provided with a collar, and the outer edge of the collar and the side wall of the receiving cavity form a sliding amplitude; The bottom of the rod segment located above the collar is slidably fitted in the first shaft hole, and the top of the rod segment extends out of the first shaft hole. The upper end face of the collar is fitted with the top wall of the receiving cavity to restrict the displacement of the elastic push rod. The compression spring is sleeved on the rod segment located below the collar, and the lower end face of the collar abuts against the upper end of the compression spring. The compression spring applies an upward elastic force to the push rod through the collar.

[0008] Preferably, the bottom of the rod segment located below the collar is slidably fitted inside the guide sleeve, the guide sleeve is installed at the bottom of the receiving cavity, and the upper end face of the guide sleeve abuts against the lower end of the compression spring.

[0009] Preferably, the bracket is detachably mounted on the worktable of the press, and the bracket is provided with a support surface for positioning and supporting the skin air valve, the shape of which is adapted to the shape of the skin air valve.

[0010] Preferably, the first positioning groove is T-shaped, including a rectangular groove that runs horizontally through the base and an arc-shaped groove that extends longitudinally from the middle of the rectangular groove to the side of the base; The top opening of the first shaft hole is located at the bottom of the rectangular groove.

[0011] Preferably, the pressure shaft is stepped, with a large diameter section at the top and a small diameter section at the bottom.

[0012] Preferably, a pressure block is detachably mounted on the base; The bottom surface of the clamping block is provided with a second positioning groove for positioning the universal joint. The bottom surface of the clamping block and the top surface of the base are arranged opposite to each other to clamp the universal joint together. The pressing block is provided with a second shaft hole, and the bottom end of the pressing shaft can extend into the second shaft hole and press against the cotter pin.

[0013] Preferably, the second positioning groove and the first positioning groove are structurally compatible.

[0014] Preferably, the pressure shaft is stepped; the second shaft hole is a stepped hole, with a large inner diameter section at the upper end and a small inner diameter section at the lower end; The stepped surface of the pressure shaft mates with the stepped surface of the second shaft hole to limit the pressing stroke of the pressure shaft.

[0015] The beneficial effects of this utility model are: 1. Achieving precise centering and vertical force application to effectively prevent cotter pin deformation: The universal joint is precisely positioned through the first positioning groove on the top surface of the base, and is coaxially positioned above the cotter pin with the pressure shaft, ensuring that the pressure shaft driven by the press press vertically presses against the tail of the cotter pin. This structure ensures that the disassembly force is strictly applied along the axis of the cotter pin, avoiding lateral or skewed force caused by narrow operating space and obstructed vision. This fundamentally prevents the cotter pin from bending, expanding, or undergoing local deformation during disassembly, improving disassembly accuracy and component integrity.

[0016] 2. The elastic push rod provides buffer support and automatic ejection, improving the smoothness and efficiency of disassembly: The elastic push rod installed in the receiving cavity supports the cotter pin through elasticity during disassembly; this structure provides buffer when the pressure shaft is pressed down, offsetting the impact force and preventing the cotter pin from deforming due to sudden force; at the same time, after the cotter pin is pressed out, the elastic push rod automatically ejects it out of the receiving cavity, facilitating the recovery of the cotter pin, ensuring the smoothness and controllability of the disassembly process, and improving operational efficiency.

[0017] 3. The clamping block and the base work together to improve disassembly stability and safety: The clamping block is detachably installed on the base, and the second positioning groove on its bottom surface and the first positioning groove of the base clamp the universal joint together to form a stable fixed structure. This design prevents the universal joint from shifting during disassembly, ensures accurate force transmission, reduces the risk of component damage, and improves operational safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 for Figure 1 Cross-sectional view of the central base; Figure 3 This is a schematic diagram of a bracket structure; Figure 4 This is a cross-sectional view of the base in Example 2; Figure 5 This is a schematic diagram of the structure of the first positioning groove; Figure 6 This is a schematic diagram of the structure of Embodiment 4 of this utility model; Figure 7 for Figure 6 Schematic diagram of the structure of the medium-pressure support block; Figure 8 for Figure 6 Assembly diagram of the middle base and the pressure block.

[0020] 1-Press, 2-Base, 3-Bracket, 4-Pressure shaft, 5-Receiving cavity, 6-First positioning groove, 7-First shaft hole, 8-Pressure head, 9-Top rod, 10-Compression spring, 11-Shaft collar, 12-Guide sleeve, 13-Support surface, 14-Rectangular groove, 15-Arc groove, 16-Pressure holding block, 17-Second positioning groove, 18-Second shaft hole. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0023] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

[0024] Example 1

[0025] See Figures 1 to 3 A disassembly tool for the cotter pin of an aircraft skin air valve includes a press 1, a base 2, a bracket 3, and a pressure shaft 4.

[0026] The bottom of the base 2 is detachably threaded into a threaded hole opened on the worktable of the press 1; the press 1 in this embodiment is a manual press, also known as a manual punch press; in addition, the press 1 can also be a servo press or other types of presses to adapt to different application scenarios and improve the versatility of tooling. The base 2 has an internal receiving cavity 5 extending along the axial direction of the base 2. The top surface of the base 2 has a first positioning groove 6 for positioning the universal joint. The shape of the first positioning groove 6 should match the shape of the universal joint so that the universal joint can be positioned in the first positioning groove 6. The top surface of the base 2 also has a first shaft hole 7 that communicates with the receiving cavity 5. The first shaft hole also extends along the axial direction of the base 2 and is coaxially arranged below the cotter pin. Here, the cotter pin refers to the cotter pin installed on the universal joint.

[0027] The bracket 3 is used to position and support the skin air valve, so that the universal joint on the skin air valve can be positioned and supported on the upper surface of the base 2. In this embodiment, the bracket 3 is plate-mounted and can be installed on the worktable of the press 1 or other frames. Preferably, the bracket 3 is detachably installed on the worktable of the press 1 for easy adjustment and replacement. Specifically, the detachable installation can be achieved by inserting the bracket 3 into the worktable of the press 1. See also Figure 3 The bracket 3 is provided with a support surface 13 for positioning and supporting the skin air valve. The shape of the support surface 13 is adapted to the shape of the skin air valve, so that a suitable bracket 3 can be selected according to the different shapes of the skin air valve, thereby enhancing adaptability.

[0028] The pressure shaft 4 is coaxially positioned above the cotter pin. The top end of the pressure shaft 4 is used to abut against the pressure head 8 of the press machine 1, and the bottom end is used to press against the cotter pin. The pressure head 8 abuts against the pressure shaft 4 under the drive of the press machine 1, pressing the cotter pin out into the receiving cavity 5. The pressure shaft 4 is preferably stepped, with a large diameter section at the top and a small diameter section at the bottom. The step of the pressure shaft 4 is engaged with a universal joint, thereby limiting the pressing stroke of the pressure shaft 4.

[0029] This embodiment achieves rapid and precise disassembly of cotter pins through the synergistic action of the base 2, bracket 3, and pressure shaft 4, avoiding the inconvenience and risk of damage associated with traditional manual operation, and improving maintenance efficiency and safety.

[0030] Example 2 See Figure 4 Based on the above embodiment 1, in order to automatically eject the disassembled cotter pin, this embodiment adds an elastic push rod in the receiving cavity 5.

[0031] The cavity 5 is equipped with an elastic push rod, the top of which extends out of the first shaft hole 7 and elastically expands and contracts along the axial direction of the first shaft hole 7 under elastic action. There are many ways to achieve the above structure. The following is a detailed description of a preferred structure: The elastic push rod includes a push rod 9 and a compression spring 10. A collar 11 is provided on the rod body of the push rod 9. The outer edge of the collar 11 and the side wall of the receiving cavity 5 form a sliding amplitude to ensure smooth axial movement of the push rod 9. The bottom of the rod segment above the collar 11 is slidably fitted in the first shaft hole 7, and the top of the rod segment extends out of the first shaft hole 7. The upper end face of the collar 11 is fitted with the top wall of the receiving cavity 5 to limit the displacement range of the elastic push rod. A compression spring 10 is sleeved on the rod segment below the collar 11. The lower end face of the collar 11 abuts against the upper end of the compression spring 10. The compression spring 10 applies an upward elastic force to the push rod 9 through the collar 11. The lower end of the compression spring 10 can be abutted in various ways, such as directly abutting against the worktable of the press 1, as long as it can provide upward elastic force for the push rod 9; as a preferred solution, the bottom of the rod segment located below the collar 11 is slidably fitted in the guide sleeve 12, and the guide sleeve 12 is detachably fixedly installed at the bottom of the receiving cavity 5; specifically, the bottom of the receiving cavity 5 is provided with internal threads, and the guide sleeve 12 is provided with external threads, and the two are connected by threads, with the upper end face of the guide sleeve 12 abutting against the lower end of the compression spring 10. This structure facilitates disassembly and maintenance, while ensuring the reliability of the ejection action.

[0032] In this embodiment, the elastic push rod can automatically push out after the cotter pin is pressed out, without entering the receiving cavity 5, reducing manual intervention and improving the convenience and efficiency of operation.

[0033] Example 3 See Figure 5 Based on embodiment 1 or 2, this embodiment refines the structure of the first positioning groove 6: The first positioning groove 6 is T-shaped and includes a rectangular groove 14 that runs horizontally through the base 2 and an arc-shaped groove 15 that extends longitudinally from the middle of the rectangular groove 14 to the side of the base 2. The top opening of the first shaft hole 7 is located at the bottom of the rectangular groove 14.

[0034] The T-slot structure can more securely engage the universal joint, preventing it from shifting during disassembly, and further improving positioning accuracy and operational stability.

[0035] Example 4 See Figures 6 to 8 Based on any of the embodiments 1 to 3, in order to enhance the clamping and positioning capability of the universal joint, this embodiment detachably installs a clamping block 16 on the base 2.

[0036] The bottom surface of the clamping block 16 is provided with a second positioning groove 17 for positioning the universal joint. The bottom surface of the clamping block 16 and the top surface of the base 2 are arranged opposite to each other to clamp the universal joint. The clamping block 16 is provided with a second shaft hole 18. The bottom end of the clamping shaft 4 can extend into the second shaft hole 18 and press against the cotter pin.

[0037] Preferably, the structures of the second positioning groove 17 and the first positioning groove 6 are compatible, and when they are closed, they can form square holes and round holes.

[0038] When the pressure shaft 4 is stepped, the second shaft hole 18 is designed as a stepped hole, with the upper end being a large inner diameter section and the lower end being a small inner diameter section; the stepped surface of the pressure shaft 4 and the stepped surface of the second shaft hole 18 are matched to limit the pressing stroke of the pressure shaft 4 and prevent overpressure damage to the components.

[0039] In this embodiment, the clamping block 16 and the base 2 work together to clamp the universal joint, which significantly improves the stability and safety of the disassembly process.

[0040] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A tooling for disassembling the cotter pin of an aircraft skin air valve, characterized in that: Includes a press (1), a base (2), a bracket (3), and a pressure shaft (4); The base (2) is installed on the worktable of the press (1). The base (2) has a cavity (5) inside. The top surface of the base (2) has a first positioning groove (6) for positioning the universal joint. The top surface of the base (2) also has a first shaft hole (7) that communicates with the cavity (5). The first shaft hole (7) is coaxially arranged below the cotter pin. The bracket (3) is used to position and support the skin air valve, and to support the universal joint on the skin air valve on the upper surface of the base (2); The pressure shaft (4) is coaxially positioned above the cotter pin. The top end of the pressure shaft (4) is used to abut against the pressure head (8) of the press (1), and the bottom end is used to press against the cotter pin.

2. The disassembly fixture for the cotter pin of the aircraft skin air valve as described in claim 1, characterized in that: The cavity (5) is provided with an elastic push rod. The top end of the elastic push rod extends out of the first shaft hole (7) and elastically expands and contracts along the axial direction of the first shaft hole (7) under elastic action.

3. The disassembly fixture for the cotter pin of the aircraft skin air valve as described in claim 2, characterized in that: The elastic push rod includes a push rod (9) and a compression spring (10); The top rod (9) is provided with a collar (11), and the outer edge of the collar (11) and the side wall of the receiving cavity (5) form a sliding amplitude; The bottom of the rod segment located above the collar (11) is slidably fitted in the first shaft hole (7), and the top of the rod segment extends out of the first shaft hole (7). The upper end face of the collar (11) is fitted with the top wall of the receiving cavity (5) to restrict the displacement of the elastic push rod. The compression spring (10) is sleeved on the rod segment located below the collar (11). The lower end face of the collar (11) abuts against the upper end of the compression spring (10). The compression spring (10) applies an upward elastic force to the top rod (9) through the collar (11).

4. The disassembly fixture for the cotter pin of the aircraft skin air valve as described in claim 3, characterized in that: The bottom of the rod segment located below the collar (11) is slidably fitted in the guide sleeve (12), which is installed at the bottom of the receiving cavity (5), and the upper end face of the guide sleeve (12) abuts against the lower end of the compression spring (10).

5. The disassembly fixture for the cotter pin of the aircraft skin air valve as described in claim 1, characterized in that: The bracket (3) is detachably mounted on the worktable of the press (1). The bracket (3) is provided with a support surface (13) for positioning and supporting the skin air valve. The shape of the support surface (13) is adapted to the shape of the skin air valve.

6. The disassembly fixture for the cotter pin of the aircraft skin air valve as described in claim 1, characterized in that: The first positioning groove (6) is T-shaped and includes a rectangular groove (14) that runs horizontally through the base (2) and an arc-shaped groove (15) that extends longitudinally from the middle of the rectangular groove (14) to the side of the base (2). The top opening of the first shaft hole (7) is located at the bottom of the rectangular groove (14).

7. The disassembly fixture for the cotter pin of the aircraft skin air valve as described in claim 1, characterized in that: The pressure shaft (4) is stepped, with a large diameter section at the top and a small diameter section at the bottom.

8. The disassembly fixture for the cotter pin of the aircraft skin air valve as described in any one of claims 1-7, characterized in that: A pressure block (16) is detachably installed on the base (2); The bottom surface of the clamping block (16) is provided with a second positioning groove (17) for positioning the universal joint. The bottom surface of the clamping block (16) and the top surface of the base (2) are arranged opposite to each other to clamp the universal joint together. The pressing block (16) is provided with a second shaft hole (18), and the bottom end of the pressing shaft (4) can extend into the second shaft hole (18) and press against the cotter pin.

9. The disassembly fixture for the cotter pin of the aircraft skin air valve as described in claim 8, characterized in that: The second positioning groove (17) and the first positioning groove (6) are structurally compatible.

10. The disassembly fixture for the cotter pin of the aircraft skin air valve as described in claim 8, characterized in that: The pressure shaft (4) is stepped; the second shaft hole (18) is a stepped hole, with a large inner diameter section at the upper end and a small inner diameter section at the lower end; The stepped surface of the pressure shaft (4) mates with the stepped surface of the second shaft hole (18) to limit the pressing stroke of the pressure shaft (4).

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