Disassembling and assembling device for inner cup nut and outer cup nut of helicopter tail rotor hub

Abstract

The utility model relates to a helicopter tail rotor hub inner and outer cup nut disassembling and assembling device which comprises a tail rotor hub shell fixing device, a torque transmission device and a torque multiplier, and the output end of the torque multiplier is vertically connected with one end of a torque multiplier reducing sleeve; the tail rotor hub shell is rotationally mounted on a working table of the tail rotor hub shell fixing device; the torque transmission device comprises a sliding rod and a wrench; a first vertical plate and a second vertical plate are arranged on the working table and located on the two sides of the tail rotor hub shell. The bottom end of the wrench can be clamped in a tooth groove of the inner cup nut or the outer cup nut, and the top end of the wrench can be perpendicularly arranged at one end of the sliding rod in a sleeving mode. The other end of the sliding rod is vertically sleeved with the other end of the torque multiplier reducing sleeve. According to the scheme, the operating torque can be reduced, the torque applied to the nut during disassembling and assembling is stable, a product is not damaged, the labor intensity is reduced, and the labor efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail rotor hubs, in particular to a disassembly and assembly device for inner and outer cup nuts of a helicopter tail rotor hub. Background Art

[0002] The overall structure of a certain type of helicopter tail rotor hub shell is that the inner hole part is a universal inner ring, and the outer side is covered with a shell with three arms. The inner and outer cups and their fastening nuts are inside.

[0003] When disassembling and assembling the inner and outer cup nuts on the tail rotor hub shell of a certain type of helicopter, due to the shell structure, the space is small, and only the upper part of the inner and outer cup nuts can be used for disassembly and assembly. The lower part of the nut cannot be used at the same time. When disassembling and assembling the inner and outer cup nuts, only the upper part of the nut can be inserted with a wrench. After turning the nut to a certain angle, the wrench will be blocked by the tail rotor hub shell and cannot be turned. At this time, the wrench needs to be taken out, and the wrench teeth are reinserted into the upper tooth groove of the nut before the nut is disassembled or assembled. Because the wrench space is small, and the nut is subjected to unilateral force when turning the wrench, the wrench is easy to slip. When the wrench is turned hard, the wrench teeth are easy to slip out of the nut groove, which is very easy to damage the nut and the wrench. In addition, when disassembling the inner and outer cup nuts of the tail rotor hub shell after use, the nut disassembly force is very large, and the disassembly is difficult. When it is necessary, the inner and outer cup nuts can only be destructively disassembled, resulting in increased repair costs. Moreover, this type of helicopter is manufactured in Russia. Due to domestic and international reasons, it is difficult to purchase internal and external cup nut parts from abroad, resulting in a shortage of spare parts for repairs, affecting the repair cycle and thus affecting the combat readiness of the troops.

[0004] When assembling the inner and outer cup nuts of the used tail rotor hub housing, a specified torque needs to be applied to the nuts. The original spring scale was used to pull the wrench rod to measure the torque. The arm could not be stable when pulling the spring scale. During the process of pulling the spring scale, the pulling force could not be stable and the reading would keep jumping. In addition, the pulling direction of the spring scale could not be guaranteed to be perpendicular to the wrench, which affected the length of the arm, resulting in extremely inaccurate measurement data when the torque was finally measured.

[0005] Therefore, a helicopter tail rotor hub inner and outer cup nut disassembly and assembly device is proposed, which can be used to reduce the operating torque, stabilize the torque applied to the nut during disassembly and assembly, avoid damage to the product, reduce labor intensity and improve labor efficiency. Utility Model Content

[0006] The utility model aims to overcome the deficiencies of the prior art and provide a helicopter tail rotor hub inner and outer cup nut disassembly and assembly device, which can be used to reduce the operating torque, so that the torque applied to the nut is stable during disassembly and assembly, without damaging the product, reducing labor intensity and improving labor efficiency.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] A helicopter tail rotor hub inner and outer cup nut disassembly and assembly device is used for disassembling and assembling the inner cup nut on the inner cup of the tail rotor hub shell, and the outer cup nut on the outer cup thereof, wherein a universal ring is arranged inside the tail rotor hub shell, and the helicopter tail rotor hub inner and outer cup nut disassembly and assembly device comprises a tail rotor hub shell fixing device, a torque transmission device and a torque multiplier; the tail rotor hub shell is rotatably mounted on a workbench via the tail rotor hub shell fixing device, and the output end of the torque multiplier is vertically connected to one end of a torque multiplier adapter sleeve; the torque transmission device comprises a sliding rod and a wrench; the bottom end of the wrench can be clamped in the tooth groove of the inner cup nut or the outer cup nut, and the top end thereof can be vertically sleeved on one end of the sliding rod; the other end of the sliding rod is vertically sleeved with the other end of the torque multiplier adapter sleeve, a vertical plate one is arranged on the workbench, the torque multiplier is vertically fixedly mounted on the vertical plate one, and the sliding rod is parallel to the axis of the torque multiplier;

[0009] When the torque multiplier is rotated by a torque wrench, the slide bar drives the wrench to rotate, and the rotation of the wrench drives the inner cup nut or the outer cup nut to rotate.

[0010] In a preferred embodiment of the present scheme, the inner and outer cup nut disassembly and assembly device also includes an outer cup anti-rotation device; the outer cup anti-rotation device includes an anti-rotation wrench and a screw rod. A universal joint blind cover is provided on the tail rotor hub shell, and a flat square 2 is provided on the front side of the anti-rotation wrench to match the flat square on the universal joint blind cover; the rear end of the screw rod 1 is vertically inserted on the vertical plate 2, and an adjusting nut is threaded on the screw rod 1; after adjusting the adjusting nut toward the rear end of the screw rod 1, the front end of the screw rod 1 can be pressed against the anti-rotation wrench to prevent the outer cup from rotating when the outer cup nut is rotated; the vertical plate 2 is fixed on the work table.

[0011] In a preferred embodiment of the present scheme, the inner and outer cup nut disassembly and assembly device also includes an inner cup anti-rotation device; the inner cup anti-rotation device includes a limiting shaft, and the front end of the limiting shaft is pressed against the outer surface of the inner cup to prevent the inner cup from rotating when the inner cup nut is rotated.

[0012] In a preferred embodiment of the present scheme, the inner cup anti-rotation device also includes screw rod 2; the limiting shaft is sleeved on the front end of screw rod 2; one end of the limiting shaft is connected to the inner cup through a flat square structure, and the other end is provided with a positioning assembly; the positioning assembly is provided with a protruding positioning block, which can be inserted into the upper stopper of the tail rotor hub shell; a clamping nut for pressing the positioning assembly forward is also screwed on screw rod 2 on the outside of the positioning assembly; the front end of the screw rod 2 can be screwed into the center threaded hole of the inner cup.

[0013] In a preferred embodiment of this scheme, a knurled nut is provided at the rear end of the second screw; the knurled nut is fixedly connected to the rear end of the second screw by a pin. The second screw can be adjusted forward and backward by rotating the knurled nut, and the front end of the second screw can be screwed into the central threaded hole on the inner cup by rotating the knurled nut.

[0014] In a preferred embodiment of the present scheme, the inner and outer cup nut disassembly and assembly device also includes an adjusting pad; the adjusting pad is an elastic wedge block. When in use, the adjusting pad is inserted into the back of the wrench to apply pressure toward the inner cup nut or the outer cup nut.

[0015] Preferably, the adjusting pad is made of nylon. When the nut is turned and the nut is displaced axially, the adjusting pad always applies a certain pressure to the back of the wrench. The adjusting pad has a certain elasticity, and the wedge-shaped shape of the adjusting pad also leaves space for the nut to move axially.

[0016] In a preferred embodiment of the present scheme, a guide rail assembly is further provided on the work surface, the setting direction of the guide rail assembly is perpendicular to the axial direction of the torque multiplier, the vertical plate 1 is installed on the torque multiplier mounting seat, and the torque multiplier mounting seat is slidably installed on the guide rail assembly via a slider;

[0017] And the torque multiplier mounting seat can be fixed on the guide rail assembly via bolts.

[0018] In a preferred embodiment of the present solution, a clamp assembly is further provided on the torque multiplier mounting seat at a front side of the vertical plate;

[0019] Both ends of the torque multiplier adapter sleeve are provided with sleeve sleeves, and the sleeve sleeve at one end of the torque multiplier adapter sleeve can be clamped by a clamp assembly to prevent the sleeve sleeve from falling off the output end of the torque multiplier.

[0020] In a preferred embodiment of the present scheme, a shell support is provided on the work surface, a central screw is provided on the shell support, and the tail rotor hub shell is sleeved on the central screw;

[0021] The center screw is also provided with a casing pressing block, which is screwed with a locking nut; the tail rotor hub casing is pressed against the casing support by the casing pressing block, and is vertically locked via the locking nut.

[0022] In a preferred embodiment of the present scheme, the inner and outer cup nut disassembly and assembly device is also equipped with a digital torque wrench.

[0023] In a preferred embodiment of the present scheme, the bottom of the tail rotor hub shell fixing device is a frame structure, and the four corners of the bottom end of the frame structure are provided with anchor bolt holes, and the frame structure is fixed to the ground through the anchor bolt holes and anchor screws.

[0024] The beneficial effects of the utility model are:

[0025] (1) Compared with the traditional disassembly and assembly method of the inner and outer cup nuts of the helicopter tail rotor hub, this solution uses a tail rotor hub housing fixing device, an inner cup anti-rotation device, and an outer cup anti-rotation device to fix the tail rotor hub housing during the disassembly and assembly process, and then outputs force through a torque multiplier. The force output by the torque multiplier is transmitted to the slide bar through the torque multiplier adapter sleeve. The rotation of the slide bar drives the wrench to rotate. The bottom of the wrench engages with the tooth groove of the inner cup nut or the outer cup nut, and then the inner cup nut or the outer cup nut can be rotated by the torque multiplier to realize the disassembly and assembly of the inner and outer cup nuts of the helicopter tail rotor hub. The torque multiplier is equipped to reduce the operating torque, apply torque stably, and does not damage the product, thereby reducing labor intensity and improving labor efficiency.

[0026] (2) When assembling the inner and outer cup nuts, a digital torque wrench can be used to rotate the torque multiplier to accurately measure the assembly torque of the inner and outer cup nuts of the tail rotor hub so that the nut assembly torque is within the specified range. During operation, the value can be preset, the sound and light alarm can be realized, the peak mode can be set, and the screen display will retain the maximum value after unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the utility model;

[0029] Figure 3 It is a schematic diagram of the torque multiplier adapter sleeve of the utility model;

[0030] Figure 4 It is a schematic diagram of a wrench of the utility model;

[0031] Figure 5 It is a clamp assembly of the utility model;

[0032] Figure 6 The utility model is an anti-rotation wrench;

[0033] Figure 7 It is a schematic diagram of the product structure of the utility model;

[0034] Figure 8 It is a schematic diagram of the inner cup of the utility model;

[0035] Fig. 9 It is a schematic diagram of the inner cup anti-rotation device of the utility model. DETAILED DESCRIPTION

[0036] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following.

[0037] like Figure 1 As shown, the helicopter tail rotor hub inner and outer cup nut disassembly and assembly device includes a tail rotor hub shell fixing device, a torque transmission device and a torque multiplier 23.

[0038] Among them, reference Figure 1 to Figure 4 As shown, the output end of the torque multiplier 23 is vertically connected to one end of the torque multiplier adapter sleeve 24; the tail rotor hub shell 8 is rotatably mounted on the work surface 01 of the tail rotor hub shell fixing device; the torque transmission device includes a slide rod 21 and a wrench 22; a vertical plate 1 02 and a vertical plate 2 03 are provided on the work surface 01; the bottom end of the wrench 22 can be clamped in the tooth groove of the inner cup nut 20 or the outer cup nut 40, and the top end of the wrench 22 can be vertically mounted on the slide rod 21.

[0039] At the same time, the front end of the slide rod 21 is vertically sleeved with the other end of the torque multiplier adapter sleeve 24, the torque multiplier adapter sleeve 24 has the same length as the wrench 22, and the torque multiplier 23 is vertically fixed on the vertical plate 02, so that the slide rod 21 is parallel to the axis of the torque multiplier 23; when the torque multiplier 23 is rotated by the torque wrench, the slide rod 21 drives the wrench 22 to rotate, and the rotation of the wrench 22 drives the inner cup nut 20 or the outer cup nut 40 to rotate, so as to realize the disassembly and assembly of the inner cup nut 20 or the outer cup nut 40.

[0040] In this solution, in order to prevent the tail rotor hub shell 8 from rotating during the disassembly and assembly of the nut, the device is also provided with a locking nut 1601 to fix the tail rotor hub shell 8.

[0041] Specifically, refer to Figure 1 , Figure 7 As shown, in this embodiment, a shell support 08 is provided on the work surface 01, a center screw 09 is provided on the shell support 08, and the tail rotor hub shell 8 is mounted on the center screw 09; a shell pressing block 16 is also mounted on the center screw 09; the tail rotor hub shell 8 is pressed onto the shell support 08 by the shell pressing block 16, and is vertically locked via a locking nut 1601.

[0042] In this solution, in order to prevent the inner cup 2 from rotating with the inner cup nut 20 or the outer cup 4 from rotating with the outer cup nut 40 during the disassembly and assembly of the nut, the device is also provided with an inner cup anti-rotation device and an outer cup anti-rotation device.

[0043] Specifically, refer to Figure 1 ,as well as Figures 6 to 9As shown, the outer cup anti-rotation device includes an anti-rotation wrench 32 and a screw rod 6. The anti-rotation wrench 32 is provided with a flat square 233 in the middle thereof which matches with the flat square on the blind cover 9 of the universal joint. One end of the screw rod 6 is vertically inserted into the vertical plate 203, and an adjusting nut 5 is also screwed on the screw rod 03. By adjusting the adjusting nut 5, the screw rod 6 moves toward the product direction, and then the other end of the screw rod 6 can be pressed against the anti-rotation wrench 32 to prevent the outer cup 4 from rotating when the outer cup nut 40 is disassembled and assembled.

[0044] Furthermore, in the present embodiment, one end of the inner cup anti-rotation device is engaged with the inner cup 2 and presses the inner cup forward to prevent the inner cup 2 from rotating when the inner cup nut 20 is rotated.

[0045] Specifically, refer to Figures 7 to 9 As shown, the inner cup anti-rotation device includes a screw rod 18; one end of the screw rod 18 is provided with a knurled nut 13, and the other end thereof is fitted with a limit shaft 17; the front end of the limit shaft 17 is provided with a protrusion 1701 corresponding to the groove 11 on the inner cup, so that the front end of the limit shaft 17 can be connected with the inner cup 2 through a flat square structure and pressed on the inner cup 2, and the rear end of the limit shaft 17 is inserted with a positioning component 14, and the protruding positioning block on the positioning component 14 can be stuck in the upper stop 12 of the tail rotor hub shell 8, and the screw rod 18 is also threaded with a clamping nut 15, and the positioning component 14 can be pressed against the upper stop 12 by the clamping nut 15.

[0046] In this embodiment, the relative rotation between the limiting shaft 17 and the positioning assembly 14 is limited by a flat square structure; the knurled nut 13 is fixedly connected to the rear end of the screw rod 18 by a pin.

[0047] refer to Figure 2 As shown, in this embodiment, the inner and outer cup nut disassembly and assembly device also includes an adjusting pad 19; the adjusting pad 19 is an elastic wedge block. When in use, the adjusting pad 19 is inserted on the back of the wrench 22 to apply pressure toward the inner cup nut 20 or the outer cup nut 40.

[0048] Optionally, in the present embodiment, a guide rail assembly 04 is further provided on the working surface 01 of the tail rotor hub shell fixing device, and the setting direction of the guide rail assembly 04 is perpendicular to the axial direction of the torque multiplier 23. The vertical plate 02 is installed on the torque multiplier mounting seat, and the torque multiplier mounting seat is slidably installed on the guide rail assembly 04 via a slider 05; and the torque multiplier mounting seat can be fixed on the guide rail assembly 04 via bolts 06.

[0049] like Figure 1 , Figure 5As shown, in this embodiment, a clamp assembly 07 is further provided on the torque multiplier mounting seat on the front side of the vertical plate 02; sleeves are provided at both ends of the torque multiplier adapter sleeve 24, and the sleeve at one end of the torque multiplier adapter sleeve 24 can be clamped by the clamp assembly 07 to prevent the sleeve from falling out of the output end of the torque multiplier 23.

[0050] In this embodiment, the bottom of the tail rotor hub housing fixing device is a frame structure, and the four corners of the bottom end of the frame structure are provided with anchor bolt holes, and the frame structure is fixed to the ground through the anchor bolt holes and anchor screws.

[0051] When the present invention is used:

[0052] (1) First, remove the shell pressing block 16 and the top locking nut 1601 of the tail rotor hub shell fixing device, put the tail rotor hub shell 8 into the tail rotor hub shell fixing device, insert the inner hole of the tail rotor hub shell 8 into the center screw 09 of the device, insert the shell pressing block into the center screw, rotate the top locking nut 1601 to press the shell pressing block 16, and make sure that the tail rotor hub shell 8 and the frame do not move relative to each other;

[0053] (2) Then, slide the torque multiplier mounting seat to one side of the frame to make room for the inner cup anti-rotation device; insert the inner cup anti-rotation device into the corresponding arm hole of the inner cup 2, insert the protrusion 1701 on the limit shaft 17 of the inner cup anti-rotation device into the groove 11 of the inner cup 2, insert the middle part of the limit shaft 17 into the screw rod 18, screw the front end of the screw rod 18 into the central threaded hole of the inner cup 2, and press the limit shaft 17 onto the inner cup 2; insert the positioning block assembly 14 onto the screw rod 18, and the protruding positioning block on the positioning block assembly 14 is inserted into the upper stop 12 of the tail rotor hub shell 8, and rotate the pressing nut 15 to press the positioning block assembly 14 into the upper stop 12 of the tail rotor hub shell 8;

[0054] Slide the torque multiplier mounting seat back until the torque multiplier is concentric with the clamping nut 15, and fix the torque multiplier mounting seat with bolts to prevent the torque multiplier mounting seat from sliding sideways due to the reaction force when the clamping nut 15 is turned; open the upper half of the clamp assembly 07 on the torque multiplier mounting seat, insert the torque multiplier adapter sleeve, put down the upper half of the clamp assembly 07, and tighten the upper nut. At this time, the torque multiplier adapter sleeve will not fall out of the clamp assembly 07, achieving axial positioning, and can rotate in the clamp hole at the same time;

[0055] (4) Insert the anti-rotation wrench 32 on the fixing assembly into the central hole of the universal joint blind cover 9 as a guide, and put the anti-rotation wrench 32 on the universal joint blind cover 9 to match the flat square; rotate the screw 6 to press the anti-rotation wrench 32 to prevent the outer cup 4 from rotating when the nut is turned;

[0056] Insert the spanner 22 into the end of the inner cup nut 20, insert the spanner teeth into the tooth grooves of the inner cup nut 20, and insert the adjusting pad 19 from the back of the spanner 22. At this time, there is basically no gap between the spanner 22, the adjusting pad 19, and the tail rotor hub universal ring 7. When the inner cup nut 20 is rotated and the inner cup nut 20 is displaced axially, the adjusting pad 19 is wedge-shaped and is stuck between the spanner 22 and the tail rotor hub universal ring 7. When the inner cup nut 20 is rotated and the inner cup nut 20 is displaced axially, the adjusting pad 19 always gives a certain pressure to the back of the spanner, and the adjusting pad 19 is used as a ni The dragon material has a certain elasticity and its wedge-shaped shape leaves space for axial displacement of the inner cup nut 20; after the inner cup nut 20 has a certain axial displacement, the adjusting pad 19 is raised a certain distance upward to ensure that during the disassembly and assembly of the nut, the axial movement distance of the inner cup nut 20 matches the elasticity of the adjusting pad 19, and the adjusting pad 19 always applies a certain pressure to the back of the wrench until the nut is disassembled and assembled; the sliding rod 21 is inserted from a set of holes (an adapter tube) of the torque multiplier adapter sleeve 24, and at the same time inserted into the upper hole of the wrench 22, as shown below Figure 1 As shown, the assembly of the wrench 22 is now completed; another square head wrench is inserted from the end of the torque multiplier, and the square head wrench is rotated to transmit the torque through the torque multiplier 23 - torque multiplier adapter sleeve 24 - slide rod 21 - wrench 22 to achieve the disassembly of the inner cup nut 20;

[0057] (6) After the inner cup nut 20 is disassembled, the slide rod 21 is pulled out from the wrench hole, the wrench 22 is inserted into the end of the outer cup nut 40, the wrench teeth are inserted into the tooth grooves of the outer cup nut 40, and the adjustment pad 19 is inserted from the back of the wrench 22. The operation method is the same as the above-mentioned disassembly of the inner cup nut 20; the slide rod 21 is inserted from the sleeve hole of the torque multiplier adapter sleeve, and at the same time inserted into the upper hole of the wrench 22, and the square head wrench is rotated to transmit the torque through the torque multiplier 23-torque multiplier adapter sleeve 24-slide rod 21-wrench 33 to achieve the disassembly of the outer cup nut 40.

[0058] When assembling the inner and outer cup nuts, the operation method is the same as above. Pull the knob on the torque multiplier 23, rotate the torque multiplier 23 in the opposite direction, insert the digital torque wrench into the input end of the torque multiplier to drive the torque multiplier 23 to rotate, and transmit the torque through the torque multiplier 23 - torque multiplier adapter sleeve 24 - slide rod 21 - wrench 22 to realize the disassembly of the inner and outer cup nuts; the digital torque wrench presets the value, realizes the sound and light alarm, sets the peak mode, and after unloading, the screen displays the maximum value retained for data recording.

[0059] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A helicopter tail rotor hub inner and outer cup nut disassembly and assembly device, used for disassembling and assembling an inner cup nut (20) on an inner cup (2) of a tail rotor hub housing (8), and an outer cup nut (40) on an outer cup (4) thereof, wherein a universal ring (7) is provided inside the tail rotor hub housing (8), and characterized in that: It includes a tail rotor hub housing fixing device, a torque transmission device and a torque multiplier (23); The tail rotor hub housing (8) is rotatably mounted on a work surface (01) via a tail rotor hub housing fixing device, and an output end of the torque multiplier (23) is vertically connected to one end of a torque multiplier adapter sleeve (24); The torque transmission device comprises a sliding rod (21) and a wrench (22); The bottom end of the wrench (22) can be clamped in the tooth groove of the inner cup nut (20) or the outer cup nut (40), and the top end can be vertically sleeved on one end of the slide rod (21); The other end of the slide bar (21) is vertically sleeved with the other end of the torque multiplier adapter sleeve (24), a vertical plate (02) is provided on the work surface (01), the torque multiplier (23) is vertically fixedly installed on the vertical plate (02), and the axis of the slide bar (21) and the torque multiplier (23) are parallel; When the torque multiplier (23) is rotated by the torque wrench, the slide bar (21) drives the wrench (22) to rotate, and the rotation of the wrench (22) drives the inner cup nut (20) or the outer cup nut (40) to rotate.

2. The helicopter tail rotor hub inner and outer cup nut disassembly and assembly device according to claim 1, characterized in that: The inner and outer cup nut disassembly and assembly device also includes an outer cup anti-rotation device; The outer cup anti-rotation device comprises an anti-rotation wrench (32), a screw rod 1 (6), a universal joint blind cover (9) is provided on the tail rotor hub housing (8), and a flat square 2 (33) matching with the flat square on the universal joint blind cover (9) is provided on the front side of the anti-rotation wrench (32); The rear end of the screw rod 1 (6) is vertically inserted on the vertical plate 2 (03), and an adjusting nut (5) is screwed onto the screw rod 1 (6); After the adjusting nut (5) is adjusted toward the rear end of the screw rod (6), the front end of the screw rod (6) can be pressed against the anti-rotation wrench (32) to prevent the outer cup (4) from rotating when the outer cup nut (40) is rotated; The second vertical plate (03) is fixed on the work surface (01).

3. The helicopter tail rotor hub inner and outer cup nut disassembly and assembly device according to claim 2, characterized in that: The inner and outer cup nut disassembly and assembly device also includes an inner cup anti-rotation device; The inner cup anti-rotation device comprises a limiting shaft (17), and the front end of the limiting shaft (17) is pressed tightly against the outer surface of the inner cup (2) to prevent the inner cup (2) from rotating when the inner cup nut (20) is rotated.

4. The helicopter tail rotor hub inner and outer cup nut disassembly and assembly device according to claim 3, characterized in that: The inner cup anti-rotation device also includes a second screw (18); The limiting shaft (17) is sleeved on the front end of the second screw (18); One end of the limiting shaft (17) is connected to the inner cup (2) via a flat square structure, and the other end is provided with a positioning component (14); The positioning assembly (14) is provided with a protruding positioning block, which can be inserted into the upper stop (12) of the tail rotor hub shell (8); On the outer side of the positioning assembly, a clamping nut (15) is screwed onto the second screw rod (18) for pressing the positioning assembly (14) forward; The front end of the second screw rod (18) can be screwed into the central threaded hole of the inner cup (2).

5. The helicopter tail rotor hub inner and outer cup nut disassembly and assembly device according to claim 4, characterized in that: The rear end of the second screw rod (18) is provided with a knurled nut (13); The knurled nut (13) is fixedly connected to the rear end of the second screw rod (18) via a pin.

6. The helicopter tail rotor hub inner and outer cup nut disassembly and assembly device according to any one of claims 1 to 5, characterized in that: The inner and outer cup nut disassembly and assembly device also includes an adjustment pad (19); The adjusting pad (19) is an elastic wedge-shaped block. When in use, the adjusting pad (19) is inserted on the back of the wrench (22) to apply pressure in the direction of the inner cup nut (20) or the outer cup nut (40).

7. The helicopter tail rotor hub inner and outer cup nut disassembly and assembly device according to claim 6, characterized in that: The work surface (01) is also provided with a guide rail assembly (04), the setting direction of the guide rail assembly (04) is perpendicular to the axial direction of the torque multiplier (23), the vertical plate (02) is installed on the torque multiplier mounting seat, and the torque multiplier mounting seat is slidably installed on the guide rail assembly (04) via a slider (05); The torque multiplier mounting seat can be fixed on the guide rail assembly (04) via bolts (06).

8. The helicopter tail rotor hub inner and outer cup nut disassembly and assembly device according to claim 7, characterized in that: The torque multiplier mounting seat is also provided with a clamp assembly (07) on the front side of the vertical plate (02); Both ends of the torque multiplier adapter sleeve (24) are provided with sleeves, and the sleeve at one end of the torque multiplier adapter sleeve (24) can be clamped by a clamp assembly (07) to prevent the sleeve from falling out of the output end of the torque multiplier (23).

9. The helicopter tail rotor hub inner and outer cup nut disassembly and assembly device according to claim 6, characterized in that: The work surface (01) is provided with a shell support (08), the shell support (08) is provided with a central screw (09), and the tail rotor hub shell (8) is sleeved on the central screw (09); The central screw (09) is also provided with a casing pressing block (16) which is screwed with a locking nut (1601); the tail rotor hub casing (8) is pressed against the casing support (08) by the casing pressing block (16) and is vertically locked via the locking nut (1601).

10. The helicopter tail rotor hub inner and outer cup nut disassembly and assembly device according to any one of claims 7 to 9, characterized in that: The inner and outer cup nut disassembly and assembly device is also equipped with a digital display torque wrench.

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