Auxiliary fixing device for disassembly and assembly of 737NG aircraft brake large screw

Abstract

The utility model discloses an auxiliary fixing device for disassembly and assembly of a 737NG airplane brake large screw, which comprises a bottom plate, a circular boss is arranged in the middle of the bottom plate, an anti-abrasion pad is laid on the boss, three positioning blocks are distributed on a bottom plate platform on the periphery of the boss, the positioning blocks are higher than the boss, and the positioning blocks are arranged on the bottom plate platform. Mounting holes for fixing the bottom plate on a working platform are formed in the edge of the bottom plate; when a 737NG airplane brake large screw is disassembled and assembled, a flange at the bottom of a torsion barrel of a brake assembly is supported on the boss, and the three positioning blocks are just embedded into the three concave positions in the edge of the flange and do not abut against the structures above the concave positions. By means of the brake assembly fixing device, the brake assembly can be firmly fixed to a working platform, one-person operation can be achieved when a large screw rod is disassembled and assembled, and manpower is effectively saved.

Description

Technical Field

[0001] The utility model relates to the field of aircraft component repair, in particular to an auxiliary fixing device used for disassembling and assembling a large screw rod of a 737NG aircraft brake. Background Art

[0002] During the repair of the 737NG aircraft brake assembly, the large screw used to fix the brake assembly and the torque cylinder assembly has a large torque. If the brake assembly is not fixed during disassembly or assembly, the brake assembly will slip when the large screw is removed or installed, which is difficult for one worker to complete. The brake assembly may also fall, causing damage to personnel and workpieces. In addition, the 737NG brake manufacturer did not provide relevant solutions. Therefore, to achieve the disassembly or assembly of the 737NG aircraft brake assembly, at least one worker is required to manually fix the brake assembly. In order to effectively save manpower and realize single-person operation, we designed an auxiliary fixing device for the disassembly and assembly of the 737NG aircraft brake large screw. Utility Model Content

[0003] The utility model aims to provide an auxiliary fixing device for disassembling and assembling a large screw rod of a 737NG aircraft brake, so as to save manpower required for disassembling and assembling the large screw rod and realize single-person operation.

[0004] To achieve the above purpose, the utility model adopts the following scheme: an auxiliary fixing device for disassembling and assembling a large screw of a 737NG aircraft brake, comprising a bottom plate, a circular boss is provided in the middle of the bottom plate, an anti-wear pad is paved on the boss, three positioning blocks are distributed on the bottom plate platform outside the boss, the positioning blocks are higher than the boss, and a mounting hole is provided on the edge of the bottom plate for fixing it to a working platform;

[0005] When disassembling and assembling the large screw of the brake of the 737NG aircraft, the bottom flange of the torque cylinder of the brake assembly is supported on the boss, and the three positioning blocks are just embedded in the three recessed positions on the edge of the flange and do not conflict with the structure above the recessed positions.

[0006] As a preference:

[0007] The auxiliary fixing device also includes pins for fixing the auxiliary fixing device to the working platform.

[0008] The anti-wear pad is a Teflon pad.

[0009] The positioning block is a hollow bolt made of stainless steel with a head wrapped with a heat shrink tube sleeve, and is installed in a matching screw hole on the base plate platform.

[0010] The bottom plate is made of aluminum alloy material.

[0011] A long strip opening is provided in the middle of the side surface of the bottom plate for facilitating lifting of the entire bottom plate.

[0012] The mounting hole is an oblong hole.

[0013] The base is made of aluminum alloy and is light in weight. Combined with the use of pin fixation, the auxiliary fixing device can be quickly and easily switched to different working platforms.

[0014] The positioning block adopts a stainless steel hollow bolt with a heat shrink tube sleeve wrapped on the head. When the positioning block contacts the bottom flange of the torque cylinder, it can effectively protect the torque cylinder from being scratched and damaged.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] Usually, when disassembling or assembling the fixed large screw of the 737NG brake assembly, the brake assembly is directly placed on the work platform. When the fixed large screw needs to be torqued or loosened, the brake assembly will rotate as there is no fixing device at the bottom of the brake assembly and it is in a free state. It is difficult to achieve single-person operation. At least one worker is required to fix the brake assembly manually to complete it, resulting in a waste of manpower. By using the auxiliary fixing device for disassembling and assembling the large screw of the brake of the 737NG aircraft of the utility model, the brake assembly can be firmly fixed on the work platform, single-person operation can be achieved, and manpower can be effectively saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1-2 It is a structural schematic diagram of an auxiliary fixing device for disassembling and assembling a large screw rod of a 737NG aircraft brake according to a preferred embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the pin;

[0019] Figure 4 It is a reference diagram of the use status of the auxiliary fixing device for disassembling and assembling the large screw rod of the 737NG aircraft brake according to the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the technical solution of the present utility model.

[0021] Figure 1 , 2The structure diagram of the auxiliary fixing device for disassembling and assembling the large screw of the 737NG aircraft brake according to the preferred embodiment of the utility model is shown in the figure. As shown in the figure, it includes a bottom plate 1, a circular boss 2 is provided in the middle of the bottom plate 1, and a Teflon gasket 3 is laid on the boss 2 to reduce contact and abrasion damage. Three positioning blocks 4 are distributed on the platform outside the boss 2, and their height is higher than the boss 2. Long circular holes 9 are also opened at the four corners of the bottom plate 1 to achieve the fixation of the bottom plate 1 on the working platform.

[0022] As a preferred solution: the base plate 1 is recommended to be made of aluminum alloy. The positioning block 4 is recommended to be a hollow bolt made of stainless steel with a heat shrink tube wrapped around the head, and installed through the screw hole 5 on the outer platform of the boss 2. Figure 2 As shown. It is recommended to open a long strip opening 8 in the middle of the side of the bottom plate 1 for facilitating lifting the entire bottom plate 1. It is recommended to use a pin 6 to fix the bottom plate 1, such as Figure 3 shown.

[0023] When in use, first fix the auxiliary fixing device on the working platform (not shown) through four positioning pins 6, and place the 737NG brake assembly to be disassembled directly on the auxiliary fixing device, so that the bottom flange 7 of the brake torque cylinder is supported on the boss 2, and the three positioning blocks 4 are just embedded in the three recessed positions on the edge of the flange 7, and maintain an appropriate distance from the structure above the recessed positions without conflicting, such as Figure 4 As shown, the brake assembly is fixed without causing damage to it. When assembling the 737NG brake assembly, the torque cylinder of the brake assembly is placed on the auxiliary fixing device before final assembly. The specific operation is also the same as before to achieve the fixation of the brake assembly, and then the subsequent final assembly work is carried out.

[0024] The base plate 1 is made of aluminum alloy material and is relatively light in weight. When fixed with the pins 6 , the auxiliary fixing device can be quickly and easily switched to different working platforms.

[0025] The positioning block 4 is a stainless steel hollow bolt with a heat shrink tube sleeve wrapped around the head. When the positioning block 4 contacts the bottom flange 7 of the torque cylinder, the torque cylinder can be effectively protected from being scratched and damaged.

[0026] As can be seen from the above, by using the auxiliary fixing device for disassembling and assembling the large screw rod of the 737NG aircraft brake, the brake assembly can be firmly fixed on the work platform, so that the disassembly and assembly of the assembly can be easily achieved by one person, effectively saving manpower.

[0027] The above embodiments are only preferred embodiments of the utility model and cannot be used as limitations on the protection scope of the utility model. Any modifications and improvements based on the concept of the utility model without creative labor should fall within the protection scope of the utility model.

Claims

1. An auxiliary fixing device for disassembling and assembling the large screw of the 737NG aircraft brake, characterized in that: It includes a bottom plate, a circular boss is provided in the middle of the bottom plate, an anti-wear pad is laid on the boss, three positioning blocks are distributed on the bottom plate platform outside the boss, the positioning blocks are higher than the boss, and mounting holes are provided on the edge of the bottom plate for fixing it to the working platform; When disassembling and assembling the large screw of the brake of the 737NG aircraft, the bottom flange of the torque cylinder of the brake assembly is supported on the boss, and the three positioning blocks are just embedded in the three recessed positions on the edge of the flange and do not conflict with the structure above the recessed positions.

2. The auxiliary fixing device according to claim 1, characterized in that: It also includes pins for securing it to the work platform.

3. The auxiliary fixing device according to claim 1, characterized in that: The anti-wear pad is a Teflon pad.

4. The auxiliary fixing device according to claim 1, characterized in that: The positioning block is a hollow bolt made of stainless steel with a head wrapped with a heat shrink tube sleeve, and is installed in a matching screw hole on the base plate platform.

5. The auxiliary fixing device according to claim 2, characterized in that: The bottom plate is made of aluminum alloy material.

6. The auxiliary fixing device according to claim 1, characterized in that: A long strip opening is provided in the middle of the side surface of the bottom plate for facilitating lifting of the entire bottom plate.

7. The auxiliary fixing device according to claim 1, characterized in that: The mounting hole is an oblong hole.

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