Dismantling tool for aircraft hinge bushing

Abstract

The utility model discloses a dismounting tool for an aircraft hinge bushing, which relates to the field of mounting, dismounting and assembling of aeronautical part accessories, and is characterized by comprising an internal thread mandrel, an external thread mandrel, a part and a nut, a fixed block is arranged on the part, and a through hole for accommodating the bushing is formed in the fixed block; the internal thread mandrel and the external thread mandrel are both in clearance fit with the inner wall of the lining, the other side of the external thread mandrel is slidably connected with an extrusion block, and the diameter of the extrusion block is smaller than that of the through hole. By arranging the external thread mandrel, the internal thread mandrel and the extrusion block, an operator only needs to screw the internal thread mandrel to abut against the extrusion block to slide on the external thread mandrel and extrude the bushing to be replaced out of the through hole when dismantling the bushing to be replaced, and the diameter of the extrusion block is smaller than that of the through hole. Therefore, the extrusion block cannot be clamped in the through hole, the extrusion block can be taken out from the through hole only by inclining the part, and the complexity of operation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of aviation parts and accessories installation and removal assembly, more specifically, it relates to a removal tool for aircraft hinge bushing. BACKGROUND

[0002] In the field of aviation assembly, the adapter bushing is usually needed when installing the aircraft hinge parts. The bushing is usually installed after being frozen by liquid nitrogen. However, due to the complexity of operation or environmental factors, the bushing is prone to problems such as bruising, deformation or size out-of-tolerance during installation, resulting in unqualified installation and the need for repair. Since the bushing and the hinge are in interference fit, the bushing is tightly combined with the bottom hole during repair, making it extremely difficult to disassemble. The traditional repair method mostly uses mechanical knocking or forced pulling, which not only takes a long time and is low in efficiency, but also easily causes mechanical damage to the hinge bottom hole and the bushing to be repaired, such as scratches, deformation or even breakage, thereby affecting the precision, strength and service life of the parts. In addition, the damage caused during the repair process may increase the subsequent maintenance cost, and even affect the overall safety performance of the aircraft.

[0003] Therefore, a new solution is needed to solve this problem. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a removal tool for aircraft hinge bushing.

[0005] The above technical purpose of the utility model is realized by the following technical scheme: a removal tool for aircraft hinge bushing, comprising an internal thread mandrel, an external thread mandrel, a part and a nut, the part is provided with a plurality of fixed blocks, and the fixed blocks are provided with through holes for accommodating the bushing, the internal thread mandrel and the external thread mandrel are in clearance fit with the inner wall of the bushing, one side of the external thread mandrel is in threaded connection with the nut, the other side of the external thread mandrel is in sliding connection with an extrusion block, and the external thread mandrel is in threaded connection with the internal thread mandrel, and the diameter of the extrusion block is smaller than that of the through hole.

[0006] The utility model is further provided as follows: the length of the external thread on the external thread mandrel is smaller than that of the internal thread on the internal thread mandrel.

[0007] The utility model is further provided as follows: at least four planes are arranged on the outer wall of the internal thread mandrel and the external thread mandrel, and the planes are uniformly arranged along the circumferential direction of the outer wall.

[0008] The utility model is further provided as follows: a gasket is sleeved on one side of the external thread mandrel close to the nut, and when the nut is fixed with the external thread mandrel, the gasket is located between the nut and the fixed block.

[0009] The utility model further sets up: the diameter of nut is greater than the diameter of through hole, the diameter of gasket is greater than the diameter of nut.

[0010] The utility model further sets up: the radius of nut and extruding piece are all less than the distance from through hole to part outer wall.

[0011] The utility model further sets up: the both sides of internal thread mandrel and external thread mandrel are equipped with chamfer.

[0012] The utility model further sets up: internal thread mandrel and external thread mandrel all adopt stainless steel material to make.

[0013] Summarized above, the utility model has following beneficial effect: through setting up external thread mandrel, internal thread mandrel and extruding piece, when dismantling the bushing to be replaced, only need to twist internal thread mandrel, make it slide on external thread mandrel and extrude the bushing to be replaced from through hole, compared with traditional dismantling method, this tooling can even force, avoids local stress concentration, reduces the mechanical damage to bushing and bottom hole, protects the precision and strength of part, and the diameter of extruding piece is less than the diameter of through hole, therefore extruding piece will not be stuck in through hole, only need to tilt part to take out extruding piece from through hole, reduces the complexity of operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the assembly drawing of the utility model in part;

[0015] Figure 2 It is the structure schematic view of the utility model;

[0016] Figure 3 It is the sectional view of the utility model;

[0017] In the drawing: 1, internal thread mandrel;2, external thread mandrel;3, part;4, nut;5, fixed block;6, through hole;7, bushing;8, extruding piece;9, plane;10, gasket. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] For a better description and illustration of the embodiments of the present application, reference can be made to one or more drawings, but additional details or examples used to describe the drawings should not be considered as limiting the scope of any one of the utility model creations, presently described embodiments or preferred modes of the present application.

[0020] In the description of the present application, it should be pointed out that the directions or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like are based on the positional relationships shown in the drawings, and are only for the convenience of describing the present application, and do not indicate that the device referred to must have a particular orientation or be operated in a particular orientation, so it cannot be understood as a limitation on the present application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing the specific embodiments and are not intended to limit the present application.

[0022] The present application will be described in detail below with reference to the drawings and embodiments.

[0023] A kind of aircraft hinge bush dismantling tool, as shown in Figure 1 It includes internal thread mandrel 1, external thread mandrel 2, part 3 and nut 4, part 3 is equipped with several fixed blocks 5 and the through hole 6 for accommodating bush 7 is opened in fixed block 5, specifically, internal thread mandrel 1 and external thread mandrel 2 are made of stainless steel material, by setting fixed block 5 and through hole 6, fixed block 5 provides stable support point for tool, ensure that part 3 does not move or tilt during the process of dismantling bush 7, to ensure the accuracy and safety of operation, the design of through hole 6 makes bush 7 can be accurately installed on fixed block 5, ensure that the alignment of tool and bush 7, avoid uneven force or part 3 damage due to positional deviation, and stainless steel has higher mechanical strength, can withstand the greater tension and pressure generated when dismantling bush 7, ensure that tool is not easy to deform or damage during operation, and stainless steel material has good wear resistance, can withstand repeated use and friction, reduce the wear of tool, prolong the service life of tool.

[0024] Specifically, the inner threaded mandrel 1 and the outer threaded mandrel 2 are both in clearance fit with the inner wall of the bushing 7, one side of the outer threaded mandrel 2 is in threaded connection with the nut 4, the other side of the outer threaded mandrel 2 is in sliding connection with the extrusion block 8 and the outer threaded mandrel 2 is in threaded connection with the inner threaded mandrel 1, the diameter of the extrusion block 8 is smaller than the diameter of the through hole 6, further, the length of the outer thread on the outer threaded mandrel 2 is smaller than the length of the inner thread on the inner threaded mandrel 1, the clearance fit design makes the outer threaded mandrel 2 and the inner threaded mandrel 1 can be easily inserted into the bushing 7, reduces the operation difficulty, avoids the jam caused by too tight fit, and also avoids the scratches or damage to the inner wall of the bushing 7 during the operation process, protects the integrity of the bushing 7, since the length of the outer thread is smaller than the length of the inner thread, it can prevent the outer threaded mandrel 2 from being rotated too deeply into the inner threaded mandrel 1, ensures the stability and reliability of the threaded connection, avoids the poor fit or damage caused by rotating too deeply, by setting the extrusion block 8, the operator only needs to twist the inner threaded mandrel 1 when removing the bushing 7 to be replaced, so that the inner threaded mandrel 1 slides on the outer threaded mandrel 2 against the extrusion block 8 and extrudes the bushing 7 to be replaced out of the through hole 6, compared with the traditional removal method, the tool can apply uniform force and avoid local stress concentration, reducing mechanical damage to the bushing 7 and the bottom hole, protecting the precision and strength of the part 3, and the diameter of the extrusion block 8 is smaller than the diameter of the through hole 6, so the extrusion block 8 will not be stuck in the through hole 6, it only needs to tilt the part 3 to take out the extrusion block 8 from the through hole 6, reducing the complexity of the operation.

[0025] The outer wall of the inner threaded mandrel 1 and the outer threaded mandrel 2 is provided with at least four planes 9, and the planes 9 are uniformly arranged along the circumferential direction of the outer wall, by setting four planes 9 and two-by-two symmetrical arrangement of the four planes 9, the operator can use the vice to clamp both when twisting the outer threaded mandrel 2 and the inner threaded mandrel 1, and the setting of the plane 9 makes the clamping more stable and not easy to shake, the plane 9 can increase the contact area between the vice and the mandrel, prevent slipping, and can apply uniform force to avoid local stress concentration and protect the surface of the mandrel from being damaged or deformed.

[0026] The gasket 10 is sleeved on one side of the outer threaded mandrel 2 close to the nut 4, when the nut 4 is fixed with the outer threaded mandrel 2, the gasket 10 is located between the nut 4 and the fixed block 5, by setting the gasket 10, it avoids the direct contact between the nut 4 and the fixed block 5, prevents the nut 4 from causing indentation or scratches on the surface of the fixed block 5 when tightening, and the gasket 10 can uniformly distribute the pressure applied by the nut 4 to the fixed block 5, avoiding local stress concentration and protecting the structural integrity of the fixed block 5, at the same time, the existence of the gasket 10 increases the friction between the nut 4 and the fixed block 5, making the connection more stable, preventing the nut 4 from loosening during the operation process, and improving the stability of the connection.

[0027] The two sides of the inner threaded mandrel 1 and the outer threaded mandrel 2 are provided with chamfers, the chamfer design makes the mandrel more smooth when inserted into the bushing 7 or matched with other components, reduces the insertion resistance, facilitates installation and disassembly, the diameter of the nut 4 is greater than the diameter of the through hole 6, the diameter of the gasket 10 is greater than the diameter of the nut 4, and the radius of the nut 4 and the radius of the extrusion block 8 are both smaller than the distance from the through hole 6 to the outer wall of the part 3, through the above setting, it is ensured that the nut 4 cannot pass through the through hole 6, the nut 4 is prevented from accidentally falling off during operation, and the stability and safety of the tooling are improved, and the gasket 10 serves as a buffer layer between the nut 4 and the fixed block 5, the diameter of the gasket 10 is greater than the diameter of the nut 4, further preventing the nut 4 from loosening or falling off, and protecting the surface of the fixed block 5, since the radius of the extrusion block 8 is smaller than the distance from the through hole 6 to the outer wall of the part 3, it is ensured that the extrusion block 8 has sufficient space to move in the through hole 6, interference between the extrusion block 8 and the outer wall of the part 3 is avoided, and it is ensured that the extrusion block 8 can smoothly slide and push out the bushing 7.

[0028] The preferred embodiments of the utility model are described above, the protection scope of the utility model is not limited to the above-mentioned embodiments only, any technical scheme under the idea of the utility model belongs to the protection scope of the utility model. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.

Claims

1. A tool for removing an aircraft hinge bushing, characterized by: The utility model relates to a threaded mandrel (1), an outer threaded mandrel (2), a part (3) and a nut (4), the part (3) is equipped with a plurality of fixed blocks (5) and is equipped with the through -hole (6) of accommodating bushing (7) on the fixed block (5), the threaded mandrel (1) and outer threaded mandrel (2) are all with bushing (7) inner wall clearance cooperation, one side of outer threaded mandrel (2) is connected with nut (4) threadedly, the other side of outer threaded mandrel (2) is connected with extrusion block (8) slidingly and outer threaded mandrel (2) is connected with threaded mandrel (1) threadedly, the diameter of extrusion block (8) is less than the diameter of through -hole (6).

2. A tool for removing an aircraft hinge bushing according to claim 1, wherein: The length of the outer thread on the outer threaded mandrel (2) is less than the length of the inner thread on the threaded mandrel (1).

3. The aircraft hinge bushing removal tool of Claim 1, wherein: The outer wall of the threaded mandrel (1) and outer threaded mandrel (2) is equipped with at least four planes (9) and the plane (9) is evenly arranged along the circumferential direction of the outer wall.

4. A tool for removing an aircraft hinge bushing according to claim 3, wherein: The outer threaded mandrel (2) is equipped with a gasket (10) on one side close to the nut (4), when the nut (4) is fixed with the outer threaded mandrel (2), the gasket (10) is located between the nut (4) and the fixed block (5).

5. A tool for removing an aircraft hinge bushing according to claim 4, wherein: The diameter of the nut (4) is greater than the diameter of the through -hole (6), and the diameter of the gasket (10) is greater than the diameter of the nut (4).

6. A tool for removing an aircraft hinge bushing according to claim 1, wherein: The radius of the nut (4) and the radius of the extrusion block (8) are less than the distance from the through -hole (6) to the outer wall of the part (3).

7. The aircraft hinge bushing removal tool of Claim 1, wherein: The threaded mandrel (1) and outer threaded mandrel (2) are both equipped with chamfers on both sides.

8. The aircraft hinge bushing removal tool of Claim 1, wherein: The threaded mandrel (1) and outer threaded mandrel (2) are both made of stainless steel.

Images