Helicopter main reduction rotor shaft end cover extractor

Abstract

The utility model provides an extractor for a main reduction rotor shaft end cover of a helicopter, a threaded hole is formed in the center of the main reduction rotor shaft end cover of the helicopter, and the extractor comprises a supporting assembly arranged on the end face of a main reduction rotor shaft of the helicopter; threads are arranged at the two ends of the extraction rod, one end of the extraction rod is connected with the threaded hole, and the other end of the extraction rod is connected with the supporting assembly; the extraction nut is arranged on the supporting assembly, and the extraction nut is connected with the other end of the extraction rod; wherein the extraction nut is rotated, and the extraction rod moves upwards, so that the main reduction rotor shaft end cover of the helicopter is pulled out. According to the extractor for the end cover of the main reduction rotor shaft of the helicopter, the feasibility and safety of the dismounting process are guaranteed.

Description

Technical Field

[0001] This application belongs to the field of helicopter assembly technology, and in particular relates to a helicopter main rotor shaft end cap extractor. Background Technology

[0002] The helicopter's main rotor shaft is a hollow shaft with gears. For dust prevention during transportation, a rotor shaft end cap is installed at the top for sealing. The end cap has a groove along its edge, in which a sealing ring is installed to mate with the hole in the rotor shaft.

[0003] Because the seals fit very tightly, when it is necessary to remove the end cap to install certain components on the rotor shaft, there are often no suitable tools available. Utility Model Content

[0004] Purpose of the application: To address the problem that the main rotor shaft end cover of a helicopter has an overly tight fit with the rotor shaft hole due to the presence of a sealing ring, making disassembly difficult.

[0005] This application provides a helicopter main rotor shaft end cap extractor, wherein the helicopter main rotor shaft end cap has a threaded hole at its center, and the extractor comprises:

[0006] The support assembly is located on the end face of the helicopter's main rotor shaft;

[0007] The extraction rod has threads at both ends, with one end connected to the threaded hole and the other end connected to the support assembly;

[0008] An extraction nut is provided on the support assembly and is connected to the other end of the extraction rod; wherein, rotating the extraction nut causes the extraction rod to move upward, thereby pulling out the end cap of the helicopter main rotor shaft.

[0009] Preferably, the support component includes:

[0010] Support plate;

[0011] A support rod, one end of which is connected to the support plate, and the other end which is in contact with the end face of the helicopter's main rotor shaft.

[0012] Preferably, the support rods include at least three rods, and the support assembly further includes:

[0013] A hexagonal nut is used to fix one end of the support rod to the support plate.

[0014] Preferably, the hexagonal nuts are disposed on both sides of the support plate; wherein, the support rod is fixedly connected to the support plate by two nuts, one above and one below.

[0015] Preferably, the support plate is provided with a through hole and a threaded hole, the other end of the extraction rod can pass through the through hole, and one end of the support rod is connected to the threaded hole.

[0016] Preferably, the extraction nut is provided with a rotating handle.

[0017] The beneficial technical effects of this application are as follows:

[0018] The helicopter main rotor shaft end cap extractor provided in this application ensures the feasibility and safety of the disassembly process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the helicopter main rotor shaft end cap and the helicopter main rotor shaft provided in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the tooling assembly provided in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the support plate provided in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the support rod provided in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the extraction rod provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of nut extraction provided in an embodiment of this application;

[0025] Among them, 1-support plate, 2-support rod, 3-extraction rod, 4-extraction nut, 5-hexagonal nut, 6-helicopter main rotor shaft end cap, 7-helicopter main rotor shaft. Detailed Implementation

[0026] Please see Figure 1 The rotor shaft end cover provided in this application has an M8 threaded hole in the center, and a suitable main reducer rotor shaft end cover disassembly fixture can be designed using this M8 threaded hole.

[0027] Please see Figure 2 The helicopter main rotor shaft end cap extractor includes: support plate 1, support rod 2, extraction rod 3, extraction nut 4, and hexagonal nut 5.

[0028] Among them, support plate 1 (see Figure 3 One hole is drilled in the center and three holes are drilled around the circumference, all with a diameter of φ16.5. Support rod 2 (see...) Figure 4 The diameter is φ16, with an M16 thread only at one end. Extraction rod 3 (see...) Figure 5One end is threaded with an M16 thread, followed by a φ16 cylinder, then an M8 external thread. This M8 external thread is screwed into the M8 threaded hole of the main rotor shaft end cap. Remove nut 4 (see...) Figure 6 Used in conjunction with extraction rod 3. Hex nut 5 (see...) Figure 6 The specifications are M16, S=30, with one on the top and one on the bottom. After tightening, the position of the support rod relative to the support plate can be locked.

[0029] After assembling the above components, the main rotor shaft end cover can be slowly pulled out by continuously tightening the extraction nut 4. This utility model provides a tooling for disassembling the helicopter main rotor shaft end cover, including: a support plate 1, a support rod 2, an extraction rod 3, an extraction nut 4, and a hexagonal nut 5.

[0030] Among them, support plate 1 (see Figure 3 Made of 45# steel, it is circular in shape with one hole in the center and three holes around the circumference. The diameter of the holes is slightly larger than the diameter of the part passing through them. Extraction rod 3 (see...) Figure 5 The M8 external thread at the end of the support plate 1 is screwed into the M8 threaded hole of the rotor shaft end cap through the central hole, and then the extraction nut 4 is installed on the upper part. There are 3 support rods 2 in total, and each one is installed in the same way. First, screw in one hexagonal nut 5, which passes through the hole on the circumference of the support plate 1, and then screw in another hexagonal nut 5 on the upper part. Adjust the position of the support plate 1 relative to the support rod 2 according to the situation on the machine, and then tighten the hexagonal nuts 5 (2 at each support rod, 6 in total) to lock the position.

[0031] More specifically, there are three support rods 2, made of 45# steel. They bear the pressure when tightening the extraction nut 4, see details below. Figure 2 .

[0032] More specifically, there is one extraction rod 3, made of 30CrMnSiA material. One end of the extraction rod 3 has an M16 thread, which mates with the extraction nut 4. Next is a φ16 cylindrical smooth rod, followed by an M8 external thread. This M8 external thread is screwed into the M8 threaded hole of the main rotor shaft end cap. See details... Figure 2 .

[0033] More specifically, the number of nuts extracted is 1, and the material is 45# steel.

[0034] Assemble the above components as shown in the diagram. In actual operation, tighten the extraction nut 4 to remove the rotor shaft end cover.

Claims

1. A helicopter main rotor shaft end cap extractor, wherein the helicopter main rotor shaft end cap has a threaded hole at its center, characterized in that, The extractor includes: The support assembly is located on the end face of the helicopter's main rotor shaft; The extraction rod has threads at both ends, with one end connected to the threaded hole and the other end connected to the support assembly; An extraction nut is provided on the support assembly and is connected to the other end of the extraction rod; wherein, rotating the extraction nut causes the extraction rod to move upward, thereby pulling out the helicopter main rotor shaft end cap; The support components include: Support plate; A support rod, one end of which is connected to the support plate and the other end of which contacts the end face of the helicopter main rotor shaft, the support rod comprising at least three rods.

2. The extractor of claim 1, wherein, The support components also include: A hexagonal nut is used to fix one end of the support rod to the support plate.

3. The extractor of claim 2, wherein, The hexagonal nuts are located on both sides of the support plate; the support rod is fixedly connected to the support plate by two nuts, one above and one below.

4. The extractor of claim 1, wherein, The support plate is provided with a through hole and a threaded hole. The other end of the extraction rod can pass through the through hole, and one end of the support rod is connected to the threaded hole.

5. The extractor of claim 1, wherein, The extraction nut is equipped with a rotating handle.

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