Helicopter main reducer and propeller hub transfer device

Abstract

The utility model belongs to the field of helicopter assembly, and particularly relates to a helicopter main reducer and propeller hub transfer device. As the main reducer and the propeller hub are heavy, the trailer needs to be pushed by multiple persons together, and time and labor are wasted. The helicopter main reducer and propeller hub transfer device is used for assembling and transferring a main reducer and a propeller hub, a main body of the device is a frame type vehicle body, a plurality of coplanar positioning blocks are arranged on the upper end face of the vehicle body, an included angle is formed between the positioning blocks and the horizontal plane, positioning holes are formed in the positioning blocks, and the main reducer is positioned through a positioning assembly; a box body is arranged in the vehicle body, and a sliding door is arranged around the vehicle body; an electric moped and a supporting leg assembly are arranged at the bottom of the vehicle body, and the supporting leg assembly can be supported by the electric moped in the transferring process. And under the condition of meeting the production of a general assembly workshop, the working intensity of workers is reduced, the transferring, mounting and hoisting time is saved, and the production efficiency of helicopters is improved.

Description

Technical Field

[0001] This utility model belongs to the field of helicopter assembly, specifically relating to a helicopter main reducer and rotor hub transfer device. Background Art

[0002] The main reduction gear is one of the main transmission components of a helicopter, and it is also the most complex, largest, and most important component in the transmission system. The rotor hub is the connection structure between the helicopter rotor drive shaft and the rotor blades. The total weight of the main reduction gear and rotor hub is approximately 1.2t.

[0003] In actual production, the main reducer is transported by the supplier to a designated location in the final assembly workshop. The main reducer is then installed on a transfer device, which is used to move the main reducer to the designated location. The main reducer does not need to be disassembled and is installed directly on the transfer device. After assembling the main reducer, rotor hub, and connecting parts, the assembly components are moved to the vicinity of the fuselage using the transfer device. Finally, the main reducer and rotor hub assembly are installed on the helicopter's main reducer platform using a lifting device.

[0004] Currently, the main assembly workshop primarily uses traditional trailers for transporting the main reducer and propeller hub. These trailers consist of a frame, tow bar, casters, jacks, and connectors. Due to the significant weight of the main reducer and propeller hub, the trailers require multiple people to push them, which is time-consuming and labor-intensive. When hoisting and assembling components, prefabricated hangers are used. However, because the assembled components are large, they are often incompatible with the prefabricated hangers, making installation cumbersome and difficult to operate. Utility Model Content

[0005] To meet the above requirements, it is necessary to design a system that can handle the transportation, lifting, and installation of main reducers and rotor hubs for various helicopters, while reducing the workload of workers, saving time on transfer, installation, and lifting, and improving helicopter production efficiency, all while meeting the production needs of the final assembly workshop.

[0006] A helicopter main reducer and rotor hub transfer device is provided for the assembly and transfer of the main reducer and rotor hub. The main body of the device is a frame-type vehicle body. Several coplanar positioning blocks are provided on the upper surface of the vehicle body, and they are at an angle relative to the horizontal plane. Positioning holes are provided on the positioning blocks, and the main reducer is positioned by positioning components. There is a box in the vehicle body, and a sliding door is provided around the vehicle body. There is an electric-assisted vehicle and outrigger assembly at the bottom of the vehicle body. During the transfer process, the electric-assisted vehicle can lift the outrigger assembly.

[0007] Advantageously, the vehicle frame is fabricated from a square tube frame, with positioning blocks welded to the upper end of the frame and an electric-assisted bicycle mounting plate at the lower end of the frame.

[0008] Advantageously, the positioning blocks include positioning block one, positioning block two, positioning block three and positioning block four, which are distributed on the four sides of the upper end of the vehicle frame.

[0009] Advantageously, a sliding rail assembly, including an upper sliding rail and a lower sliding rail, is installed at the edge of the vehicle body frame, and the upper and lower edges of the sliding door are inserted into the tracks of the sliding rail.

[0010] Advantageously, a magnetic chuck assembly, including an L-shaped magnetic chuck and a flat magnetic chuck, is also installed within the vehicle frame to position the sliding door magnetically.

[0011] Advantageously, each positioning block has a pair of positioning holes, and the positioning assembly includes a positioning bolt, a washer and a nut. The lower end of the positioning bolt has an external thread and is fixedly connected after passing through the positioning block. The upper end is a smooth rod structure that cooperates with the main reducer for positioning.

[0012] Advantageously, the upper end of the outrigger assembly is a threaded support column, and the lower end is fitted with an elastic rubber pad by screws.

[0013] Advantageously, the housing is made of thin aluminum alloy sheet.

[0014] Advantageously, the upper end face of the positioning block also has a nylon component for protection.

[0015] Beneficial effects:

[0016] 1) The main reducer and rotor hub transfer device of this utility model adopts the "one-sided multi-pin" positioning and clamping method, which reduces the lifting accuracy and facilitates worker operation. The positioning component not only plays a positioning role, but also plays a clamping role.

[0017] 2) Nylon protection is used to avoid damage such as bumps and impacts to the main reduction gear positioning surface;

[0018] 3) Electric-assisted vehicles are used, with lead-acid batteries providing the power source to replace traditional manual output, enabling assisted transfer and lifting of workpieces, reducing manpower and achieving green production;

[0019] 4) Use dedicated lifting devices instead of finished product hanging devices. Design dedicated lifting devices that match production based on the actual site conditions to reduce the difficulty of operation for workers. Use lifting slings instead of finished product lifting hooks to avoid three-way injury problems at the lifting position. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the main reducer and propeller hub transfer device of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of the main reducer and propeller hub transfer device of this utility model;

[0022] Figure 3 This is a schematic diagram of the vehicle body structure;

[0023] Figure 4 This is a structural diagram of the positioning component;

[0024] Figure 5 This is a structural schematic diagram of the outrigger assembly;

[0025] Figure 6 This is a schematic diagram of the suction device assembly;

[0026] Figure 7 This is a schematic diagram of the slide rail assembly. DETAILED DESCRIPTION

[0027] An embodiment of a helicopter main reducer and rotor hub transfer device includes: a vehicle body 1, a positioning component 2, a support leg component 3, a housing 4, a sliding door 5, an electric-assisted vehicle 6, a suction unit component 7, a slide rail component 8, and a nylon component 9.

[0028] The vehicle body 1 is mainly composed of positioning block 101, positioning block 2 102, positioning block 3 103, positioning block 4 104, square tube frame 105, suction device mounting plate 1 106, suction device mounting plate 2 107, and electric-assisted bicycle mounting plate 108. The four positioning blocks are coplanar and maintain an inclination angle of 4° with the horizontal direction. Each positioning block has two positioning holes, which are concentric with the main reduction gear positioning holes, for multi-point positioning of the main reduction gear. The square tube frame 105 is welded to the positioning plate and must avoid the shape of the main reduction gear and the installation position of the connecting parts to ensure that the vehicle body 1 does not interfere with the main reduction gear and can be assembled smoothly.

[0029] The positioning assembly 2 mainly consists of positioning bolts 201, washers 202 and nuts 203, and there are 8 sets in total. It is used to position the 8 positioning holes of the main reducer. The positioning bolts 201 have an external thread structure on the small diameter shaft and a smooth rod structure on the large diameter shaft. The large diameter has a large clearance fit with the positioning holes of the main reducer and is clamped to the four positioning blocks on the vehicle body 1 by nuts 203. Two sets of positioning assemblies 2 are installed on each positioning block.

[0030] The outrigger assembly 3 mainly consists of a support column 301, an elastic rubber pad 302, and screws 303. The support column 301 has external threads and can be screwed to the square tube frame 105, playing a major supporting role during the installation of the main reducer and propeller hub.

[0031] The housing 4 is welded from thin aluminum alloy plates, and is riveted in some places by connecting core rivets.

[0032] The sliding door 5 is composed of a thin aluminum alloy plate and a concealed handle. The upper side of the thin aluminum alloy plate is connected to the upper slide rail 801, and the lower side is connected to the lower slide rail 802. The front and rear sides of the thin aluminum alloy plate are connected to the flat suction plate 702.

[0033] The electric-assisted bicycle 6 is a finished product, powered by a lead-acid battery, with added gear transmission and control system, which can lift and move at fixed points and change speeds. It is connected to the vehicle body 1 with a connector.

[0034] The suction assembly 7 consists of an L-shaped suction plate 701 and a flat suction plate 702. The suction plates are magnetically attached to ensure that the opening and closing position of the sliding door meets production requirements.

[0035] The slide rail assembly 8 consists of an upper slide rail 801 and a lower slide rail 802, with a slide track 803 on the opposite end face. The upper slide rail 801 and the lower slide rail 802 are fixed in the vehicle body 1, so that the sliding door 5 can slide back and forth along the slide track 803 on the outside of the vehicle body 1.

[0036] The nylon assembly 9 consists of four nylon blocks of different shapes. The nylon blocks are installed on the four positioning blocks of the vehicle body 1 using countersunk screws to protect the main positioning surface and prevent the workpiece from being damaged by bumps, impacts, or other issues.

[0037] The specific implementation method and operation steps of this utility model are as follows:

[0038] 1) The main reducer is transported by the supplier to the designated location in the final assembly workshop. The main reducer is lifted using a special lifting device and placed in the appropriate position of the main reducer and the rotor hub transfer device. Positioning component 2 is then installed.

[0039] 2) The electric-assisted vehicle 6 raises the main reduction gear and the rotor hub transfer device to ensure that the outrigger assembly 3 is off the ground, adjusts the forward speed of the electric-assisted vehicle 6 to the operator's walking speed, and transports the main reduction gear to the designated position in the final assembly workshop.

[0040] 3) Lower the main reducer and rotor hub transfer device to ensure that the outrigger assembly 3 is in contact with the ground, fix the shaft runout measuring instrument on the main reducer and rotor hub transfer device, push the sliding door 5 to the fixed position, and assemble the rotor hub and related connecting parts onto the main reducer.

[0041] 4) The assembled main reducer and propeller hub assembly is transported to the vicinity of the fuselage using the main reducer and propeller hub transfer device.

[0042] 5) With the outrigger assembly 3 providing support, install the main reducer and rotor hub lifting device in the lifting position, and hang the main reducer and rotor hub assembly with the crane. Lift the main reducer and rotor hub assembly slowly and steadily.

[0043] 6) Slowly lower the main reduction gear and propeller hub assembly onto the main reduction gear platform to complete the installation of the main reduction gear and propeller hub assembly with the entire fuselage;

[0044] 7) Remove the special lifting device for the main reducer and propeller hub, place it inside the main reducer and propeller hub transfer device, and place the auxiliary transport and installation equipment for the main reducer and propeller hub in the designated position.

Claims

1. A helicopter main reducer and rotor hub transfer device, used for the assembly and transfer of the main reducer and rotor hub, characterized in that: The main body of the device is a frame-type vehicle body (1). There are several coplanar positioning blocks on the upper surface of the vehicle body (1) and they have an angle relative to the horizontal plane. There are positioning holes on the positioning blocks, and the main reducer is positioned by the positioning component (2). There is a box (4) in the vehicle body (1) and a sliding door (5) around the vehicle body (1). There is an electric-assisted vehicle (6) and a support leg assembly (3) at the bottom of the vehicle body (1). During the transportation process, the electric-assisted vehicle (6) can lift the support leg assembly (3).

2. The helicopter main reducer and rotor hub transfer device according to claim 1, characterized in that: The vehicle frame is made of square tube frame (105), with positioning blocks welded to the upper end of the frame and electric assist vehicle mounting plate (108) at the lower end of the frame.

3. The helicopter main reducer and rotor hub transfer device according to claim 1, characterized in that: The positioning blocks include positioning block one (101), positioning block two (102), positioning block three (103) and positioning block four (104), which are distributed on the four sides of the upper end of the vehicle frame.

4. The helicopter main reducer and rotor hub transfer device according to claim 1, characterized in that: A slide rail assembly (8) is installed on the edge of the vehicle frame, including an upper slide rail (801) and a lower slide rail (802), and the upper and lower edges of the sliding door (5) are inserted into the slide rail track (803).

5. The helicopter main reducer and rotor hub transfer device according to claim 4, characterized in that: A magnetic suction assembly (7) is also installed inside the vehicle frame, including an L-shaped suction plate (701) and a flat suction plate (702), which positions the sliding door (5) by magnetic force.

6. The helicopter main reducer and rotor hub transfer device according to claim 1, characterized in that: Each positioning block has a pair of positioning holes. The positioning assembly (2) includes a positioning bolt (201), a washer (202) and a nut (203). The lower end of the positioning bolt (201) has an external thread on its small diameter. It passes through the positioning block and is fixedly connected. The upper end is a smooth rod structure that cooperates with the main reducer for positioning.

7. The helicopter main reducer and rotor hub transfer device according to claim 1, characterized in that: The upper end of the outrigger assembly (3) is a threaded support column (301), and the lower end is fitted with an elastic rubber pad (302) by screws (303).

8. The helicopter main reducer and rotor hub transfer device according to claim 1, characterized in that: The box body (4) is made of aluminum alloy sheet.

9. The helicopter main reducer and rotor hub transfer device according to claim 1, characterized in that: The upper end face of the positioning block also has a nylon component (9) for protection.

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