Motor pump fixed end shell inner snap ring dismounting pliers for aircraft repair

Abstract

The utility model discloses a motor pump fixed end shell inner snap ring dismounting clamp for aircraft repair, which comprises two clamp rods and a connecting bolt which are in cross connection, a rotating part is arranged in the middle of each clamp rod, a first connecting rod is arranged at the front end of each rotating part, and a second connecting rod is rotatably connected to the front end of each first connecting rod. A threaded blind hole is formed in the front end of the second connecting rod, a threaded connecting rod is connected into the threaded blind hole formed in the front end of the second connecting rod, and a third connecting rod and a hook rod bent outwards are sequentially installed at the front end of the threaded connecting rod. During use, the hook rod penetrates through the positioning hole in the clamping ring and is hooked on the clamping ring, the second connecting rod on the two clamp rods is rotated, the threaded blind hole is connected with the threaded connecting rod, finally, the two holding rods are held tightly, a certain gap is formed between the clamping ring and the pump motor fixing end shell, and the clamping ring is taken out of the pump motor fixing end shell after longitudinal movement.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft component repair, in particular to a pair of pliers for removing a snap ring inside a housing at a fixed end of a motor pump for aircraft repair. Background Art

[0002] The motor pump is installed on the integral drive generator of the A320 aircraft. Since the integral drive generator of the A320 aircraft is a constant speed and frequency generator, it is divided into a constant speed device and a generator device. The constant speed device converts the variable speed transmitted by the aircraft engine into a constant speed, and the constant speed is transmitted to the generator device through gears, and finally generates constant frequency AC. The working principle of the constant speed device is to use the speed feedback output by the speed regulator, and compare it with the predetermined constant speed, and feedback the difference speed through the pump motor. Thus, the output speed is adjusted to be consistent with the predetermined speed.

[0003] A copper snap ring is installed in the fixed end housing of the motor pump. The function of the copper snap ring is to fix the sliding shoe bracket to ensure that the sliding shoe bracket will not fall off the fixed end housing of the pump motor when the IDG is working. When disassembling the motor pump, since the copper snap ring is tight, according to the manual method, after inserting the positioning hole on the copper snap ring with ordinary snap ring pliers, the jaws are contracted. At this time, there is a gap between the copper snap ring and the fixed end housing of the pump motor, and the copper snap ring can be moved longitudinally to be taken out. However, in actual operation, during the process of pulling out the copper snap ring, the plunger in the housing will move freely due to external force or gravity, and will scrape the copper snap ring during the movement, causing the jaws of the snap ring pliers to fall off, making it impossible to remove the copper snap ring normally, making the process of removing the copper snap ring time-consuming and laborious. Therefore, in the current work, the worker will use the snap ring pliers and the stripping knife to pry the copper snap ring out, thereby achieving the purpose of removing the copper snap ring from the fixed end housing of the pump motor, but the pried copper snap ring is often scratched by the stripping knife head, causing component damage and cannot be used anymore. For this reason, we propose a snap ring removal pliers for the fixed end housing of a motor pump for aircraft repair. Utility Model Content

[0004] The utility model aims to provide a pliers for removing the inner snap ring of a motor pump fixed end housing for aircraft repair, so as to solve the problems raised in the above-mentioned background technology.

[0005] A motor pump fixed end housing inner snap ring removal pliers for aircraft repair, comprising two cross-connected pliers and connecting bolts, a rotating part is arranged at the middle position of the pliers, the rotating parts of the two pliers are stacked together, a threaded through hole and a strip groove are respectively opened on the rotating parts of the two pliers, and the connecting bolt passes through the strip groove and is screwed into the threaded through hole;

[0006] A first connecting rod is provided at the front end of the rotating part, and the front end of the first connecting rod is rotatably connected to the second connecting rod. A threaded connecting rod is connected to the threaded blind hole opened at the front end of the second connecting rod. The threaded connecting rod is convenient for disassembly and assembly in the threaded blind hole. A third connecting rod and an outwardly bent hook rod are installed in sequence at the front end of the threaded connecting rod, and a grip rod is connected to the rear end of the rotating part.

[0007] Preferably, a limiting groove with a T-shaped cross-section is provided in the front end of the first connecting rod, a limiting portion is connected in the limiting groove, and a second connecting rod is connected to the front end of the limiting portion. The second connecting rod can only rotate at the front end of the first connecting rod.

[0008] Preferably, an anti-slip sleeve is provided outside the grip rod to increase the friction of the grip rod and facilitate the use of the disassembly pliers.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] When using the disassembly pliers to disassemble the clamping ring in the fixed end housing, first disassemble the threaded connecting rod, the third connecting rod and the hook rod of the two clamp rods, then pass the hook rod through the positioning hole on the clamping ring and hook it on the clamping ring to prevent it from falling off, and then rotate the second connecting rod on the two clamp rods to connect the threaded blind hole with the threaded connecting rod, and then reconnect the threaded connecting rod, the third connecting rod and the hook rod to the clamp rod. During the connection process, the relative angle between the two clamp rods can be adjusted, and the two rotating parts can slide relative to each other through the strip groove and the connecting bolt to adjust the position, so as to facilitate the connection of the clamp rods.

[0011] Finally, hold the two grips tightly to tighten the hook rods relatively, so that a certain gap appears between the retaining ring and the fixed end housing of the pump motor. After longitudinal movement, remove the retaining ring from the fixed end housing of the pump motor. Tighten the connecting bolts as needed to fix the positions of the two grips relatively, ensuring that the retaining ring will not fall off due to the scratching of the plunger when it is removed, making the disassembly process time-saving and labor-saving, and avoiding damage to parts and components, ensuring the quality of repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model;

[0013] Figure 2 This is a main structural sectional view of the utility model;

[0014] Figure 3 This is a parts diagram of the fixed end housing of the motor pump of the present utility model.

[0015] In the figure: 1, clamp rod, 11, rotating part, 111, threaded through hole, 112, strip groove, 12, first connecting rod, 121, limiting groove, 13, limiting part, 14, second connecting rod, 141, threaded blind hole, 15, threaded connecting rod, 16, third connecting rod, 17, hook rod, 18, grip rod, 2, connecting bolt, 3, anti-slip sleeve, 4, retaining ring, 401, positioning hole, 5, pump motor fixed end housing, 6, plunger. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-3 A motor pump fixed end housing inner snap ring removal pliers for aircraft repair, comprising two cross-connected pliers 1 and connecting bolts 2, a rotating portion 11 is arranged at the middle position of the pliers 1, the rotating portions 11 of the two pliers 1 are stacked together, a threaded through hole 111 and a strip groove 112 are respectively opened on the rotating portions 11 of the two pliers 1, and the connecting bolt 2 passes through the strip groove 112 and is screwed into the threaded through hole 111;

[0018] A first connecting rod 12 is provided at the front end of the rotating part 11, and the front end of the first connecting rod 12 is rotatably connected to the second connecting rod 14. A limiting groove 121 with a T-shaped cross-section is provided in the front end of the first connecting rod 12, and a limiting portion 13 is connected in the limiting groove 121. The front end of the limiting portion 13 is connected to the second connecting rod 14, and the second connecting rod 14 can only rotate at the front end of the first connecting rod 12; a threaded connecting rod 15 is connected in a threaded blind hole 141 provided at the front end of the second connecting rod 14, and the threaded connecting rod 15 is convenient for disassembly and assembly in the threaded blind hole 141, and a third connecting rod 16 and an outwardly bent hook rod 17 are sequentially installed at the front end of the threaded connecting rod 15. When using the disassembly pliers to disassemble the retaining ring in the fixed end housing, firstly, the two The threaded connecting rod 15, the third connecting rod 16 and the hook rod 17 of the clamp rod 1 are disassembled, and then the hook rod 17 is passed through the positioning hole 401 on the snap ring 4 and hooked on the snap ring 4 to prevent it from falling off, and then the second connecting rod 14 on the two clamp rods 1 is rotated to connect the threaded blind hole 141 with the threaded connecting rod 15, so that the threaded connecting rod 15, the third connecting rod 16 and the hook rod 17 are reconnected with the clamp rod 1; the rear end of the rotating part 11 is connected to the grip rod 18, and the grip rod 18 is provided with an anti-slip sleeve 3 outside to increase the friction of the grip rod 18 and facilitate the use of the disassembly pliers; the two grip rods 18 are gripped tightly to tighten the hook rod 17 relatively, so that a certain gap appears between the snap ring 4 and the pump motor fixed end housing 5, and the snap ring 4 is taken out of the pump motor fixed end housing 5 after longitudinal movement.

[0019] Working principle: When using the disassembly pliers to disassemble the snap ring in the fixed end housing, first disassemble the threaded connecting rod 15, the third connecting rod 16 and the hook rod 17 of the two clamp rods 1, then pass the hook rod 17 through the positioning hole 401 on the snap ring 4, and hook it on the snap ring 4 to prevent it from falling off, and then rotate the second connecting rod 14 on the two clamp rods 1 to connect the threaded blind hole 141 with the threaded connecting rod 15, and then reconnect the threaded connecting rod 15, the third connecting rod 16 and the hook rod 17 with the clamp rod 1;

[0020] Grip the two gripping rods 18 tightly to relatively tighten the hook rod 17, so that a certain gap appears between the snap ring 4 and the pump motor fixed end housing 5, and then remove the snap ring 4 from the pump motor fixed end housing 5 after longitudinal movement.

[0021] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0022] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pliers for removing the inner snap ring of a motor pump fixed end housing for aircraft repair, comprising two cross-connected pliers rods (1) and connecting bolts (2), characterized in that: A rotating portion (11) is provided in the middle of the clamp rod (1), and a threaded through hole (111) and a strip groove (112) are respectively provided on the rotating portions (11) of the two clamp rods (1), and the connecting bolt (2) passes through the strip groove (112) and is screwed into the threaded through hole (111); The front end of the rotating part (11) is provided with a first connecting rod (12), the front end of the first connecting rod (12) is rotatably connected to the second connecting rod (14), a threaded connecting rod (15) is connected in a threaded blind hole (141) provided at the front end of the second connecting rod (14), a third connecting rod (16) and an outwardly bent hook rod (17) are sequentially installed at the front end of the threaded connecting rod (15), and the rear end of the rotating part (11) is connected to a grip rod (18).

2. A pliers for removing the inner snap ring of a motor pump fixed end housing for aircraft repair according to claim 1, characterized in that: A limiting groove (121) with a T-shaped cross section is provided in the front end of the first connecting rod (12), a limiting portion (13) is connected in the limiting groove (121), and a second connecting rod (14) is connected at the front end of the limiting portion (13).

3. A pliers for removing the inner snap ring of a motor pump fixed end housing for aircraft repair according to claim 1, characterized in that: An anti-slip sleeve (3) is arranged outside the grip rod (18).

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