A fixing device for the main reducer of a helicopter

Abstract

The present invention relates to the technical field of helicopter main reducer assembly, and relates to a fixing device for a helicopter main reducer, including a device base, a strut mounting base, a strut mounting seat, an adjustable support rod, a support bottom plate, and a support base; four strut mounting bases are respectively arranged at the four corners of the upper end surface of the device base, and each strut mounting base is provided with a strut mounting seat, and the strut mounting seat is connected to one end of the adjustable support rod; four adjustable support rods are used to connect with the support plate on the upper part of the main reducer, and the length and angle of the support rod are adjusted through the thread provided on the adjustable support rod itself to tighten the main reducer and prevent the main reducer from tipping over. Further fixation is achieved by two sets of pressing plate assemblies to press the torsional adapter plate of the main reducer, and shock isolation and buffering effects are achieved through two layers of rubber pads on the upper and lower parts, reducing the situation that the main reducer is affected by external forces during transportation and ensuring the safety of the main reducer.

Description

Technical Field

[0001] The present invention relates to the technical field of helicopter main reducer assembly, and is applicable to a helicopter main reducer, realizing reliable fixation of the helicopter main reducer and safe and reliable storage and transportation of the main reducer. Background Art

[0002] After a certain helicopter main reducer is assembled and finally submitted to the user, in order to ensure the quality of the main reducer, relevant work such as testing and painting needs to be carried out. During each relevant process, issues such as fixed storage, transfer of work, and transportation are involved. However, in order to avoid knocking, hitting, and bruising the main reducer during the transfer process and ensure the safety protection of the main reducer during the transfer process; moreover, a certain helicopter main reducer has a certain inclination angle in the vertical direction, and 24 screw piles are distributed at the bottom of the main reducer. Therefore, it is necessary to design a set of storage and transfer devices applicable to a certain helicopter main reducer to ensure the test reliability and working efficiency of the helicopter main reducer. At present, there is no definite and mature solution in this field to achieve this function.

[0003] Object of the Invention

[0004] The object of the present invention is to provide a fixing device for a helicopter main reducer, ensuring that the main reducer is vertically placed and equipped with a fixing mechanism to ensure safe and reliable storage and transportation of the main reducer.

[0005] Technical Solution

[0006] In order to achieve the above object, a fixing device for a helicopter main reducer is provided, including a device base, a support rod mounting base, a support rod mounting seat, an adjustable support rod, a support bottom plate, and a support base; four support rod mounting bases are respectively arranged at the four corners of the upper end surface of the device base, and each support rod mounting base is provided with a support rod mounting seat. One end of the support rod mounting seat is connected to one end of the adjustable support rod, and the other end of the adjustable support rod is connected to a support plate on the upper part of the main reducer. The length and angle of the support rod are adjusted through the thread provided by the adjustable support rod to tighten the main reducer.

[0007] The bottom of the support base is horizontal, and the upper end has a certain inclination angle, so that the support bottom plate maintains the same inclination angle as the main reducer to ensure the fixation of the main reducer and the rotor shaft is vertically upward. The support base is fixedly connected to the device base.

[0008] A large through hole is opened at the center of the support bottom plate to ensure that the bottom of the main reducer can pass through without interference. There are a plurality of uniformly distributed through holes on the circumference near the edge of the through hole, corresponding to the screw piles at the bottom of the main reducer. The support bottom plate is connected to the device base through two long screw rods; two groups of pressing plate assemblies are also arranged on the support bottom plate to press the transmission torsion adapter plate of the main reducer.

[0009] Furthermore, the pressure plate assembly includes a movable pressure plate, a pressure plate supporting bolts, a fixed support plate, a pressure plate rubber pad, and a pressure plate fixing bolts; the movable pressure plate is connected to the fixed support plate through the pressure plate fixing bolts, and the fixed support plate is connected to the supporting bottom plate through bolts. The movable pressure plate has a threaded hole at the rear end, which is connected to the pressure plate supporting bolts to realize the supporting and adjusting function of the rear end of the movable pressure plate, and a pressure plate rubber pad is pasted on the bottom of the front end of the movable pressure plate; the pressure plate supporting bolts are adjusted, and the front end of the movable pressure plate clamps the main reducer torsion transmission disc to realize the fixing function.

[0010] Furthermore, the adjustable support rod includes a support rod body, two U-shaped connectors and two locking nuts, and can be connected by threads to achieve length and angle adjustment.

[0011] Furthermore, the support rod mounting seat is inclined at a certain angle so that the axes of the adjustable support rods are on the same straight line, which is convenient for connection with the main reducer.

[0012] Furthermore, the connection hole where the upper end of the support rod mounting seat is connected to the adjustable support rod contains a joint bearing, which facilitates fine adjustment of the adjustable support rod within a certain angle range.

[0013] Furthermore, the device base comprises a bottom edge, an upper crossbeam and a bottom crossbeam, which are fixed by bolts. The upper crossbeam of the device base is connected to the support rod mounting base and fixed by bolts.

[0014] Furthermore, a lifting ring is provided on the base of the support rod mounting seat for lifting the entire fixing device.

[0015] Furthermore, a rubber pad is provided on the upper surface of the support base plate along the position of the central through hole.

[0016] Beneficial technical effects

[0017] During the use of the present invention, the 24 screw piles at the bottom of the main reducer are aligned with the 24 through holes on the supporting base plate, and then the main reducer is placed on the supporting base plate. Four adjustable support rods are used to connect the support plate on the upper part of the main reducer. The length and angle of the support rods are adjusted by the threads of the adjustable support rods. The main reducer is tightened to prevent it from tipping over. The main reducer transmission torsion plate is pressed by two sets of pressure plate assemblies to further fix it. The upper and lower two layers of rubber pads are used to isolate and buffer the main reducer, reduce the external force applied to the main reducer during transportation, and ensure the safety of the main reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the schematic diagram of the main reducer device.

[0019] Figure 2 It is a side view of the device of the present invention,

[0020] Figure 3 This is the top view of the device of the present invention.

[0021] Figure 4 This is the schematic structural diagram of the pressing plate assembly in the device of the present invention (i.e., Figure 1 the enlarged schematic diagram of I-I in

[0022] Wherein: 1-device base, 2-base of the support rod mounting seat, 3-support rod mounting seat, 4-adjustable support rod, 5-lifting ring, 6-support bottom plate, 7-upper rubber pad, 8-support base, 9-lower rubber pad, 10-movable pressing plate, 11-pressing plate support bolt, 12-fixed support plate, 13-pressing plate rubber pad, 14-pressing plate fixing bolt. Specific embodiments

[0023] Refer to the appendix Figure 1 , a fixing device for the main reducer of a helicopter, comprising a device base 1, a base of the support rod mounting seat 2, a support rod mounting seat 3, an adjustable support rod 4, a lifting ring 5, a support bottom plate 6, an upper rubber pad 7, a support base 8, a lower rubber pad 9, a movable pressing plate 10, a pressing plate support bolt 11, a fixed support plate 12, a pressing plate rubber pad 13, and a pressing plate fixing bolt 14;

[0024] The adjustable support rod 4 is composed of a support rod main body, two U-shaped connectors and two locking nuts, and can be adjusted in length and angle through threaded connection. It is made of aluminum alloy material and is fixed at both ends by bolts. The upper end is connected to the main reducer, and the lower end is connected to the support rod mounting seat 3.

[0025] The support rod mounting seat 3 is at a certain inclination angle, so that the axis of the adjustable support rod 4 is on the same straight line, which is convenient for connecting with the main reducer. The upper end connection hole of the support rod mounting seat 3 contains a spherical plain bearing, which is convenient for the adjustable support rod 4.

[0026] The device base 1 is composed of a bottom edge, an upper cross beam and a bottom cross beam, and is fixed by bolts. The upper cross beam of the device base 1 is connected to the base of the support rod mounting seat 2 and fixed by bolts. The base of the support rod mounting seat 2 is connected to the support rod mounting seat 3 and fixed by bolts.

[0027] The lifting ring 5 is connected to the base of the support rod mounting seat 2 through the threaded hole on the base of the support rod mounting seat 2 for hoisting the entire fixing device.

[0028] The described support bottom plate 6 is a circular aluminum alloy plate with a certain thickness. Its center is a large through-hole to ensure that the bottom of the main reducer can pass through without interference. There are 24 uniformly distributed through-holes on the circumference near the edge of the through-hole, and one of them is a square positioning hole corresponding to 24 screw studs at the bottom of the main reducer. An upper rubber pad 7 is pasted on it. The upper rubber pad 7 also has 24 uniformly distributed through-holes corresponding to the hole positions on the support bottom plate 6. The upper rubber pad 7 plays a role in preventing bumps and buffering. The support bottom plate 6 is connected to the device base 1 through two long screw rods. The support bottom plate 6 can be made of nylon material. When using nylon material, the rubber pad 7 can be cancelled.

[0029] The bottom of the described support base 8 is horizontal, and the upper part has an inclination angle of 4.5°, so that the support bottom plate 6 maintains the same inclination angle as the main reducer, ensuring the fixation of the main reducer and the rotor shaft is vertically upward. The support base 8 is connected to the device base 1 through bolts, and a lower rubber pad 9 is pasted on it, playing a role in buffering and shock isolation. The design of the upper part of the support base 8 with an inclination angle is to adapt to the inclination angle existing in the vertical direction of the helicopter main reducer. During specific design, this angle can be changed adaptively.

[0030] The described movable pressure plate 10 is connected to the fixed support plate 12 through the pressure plate fixing bolt 14. The fixed support plate 12 is connected to the support bottom plate 6 through bolts. There is a threaded hole at the rear end of the movable pressure plate 10, which is connected to the pressure plate support bolt 11 to realize the support function at the rear end of the movable pressure plate 10. A pressure plate rubber pad 13 is pasted at the bottom of the front end of the movable pressure plate 10. The movable pressure plate 10, the pressure plate support bolt 11, the fixed support plate 12, the pressure plate rubber pad 13, and the pressure plate fixing bolt 14 form a set of pressure plate components for clamping the torsional transmission adapter plate of the main reducer to achieve the fixing function.

[0031] In a possible embodiment, the designed main reducer fixing device includes a device base 1, a support rod mounting base 2, a support rod mounting seat 3, an adjustable support rod 4, a lifting ring 5, a support bottom plate 6, an upper rubber pad 7, a support base 8, a lower rubber pad 9, a movable pressure plate 10, a pressure plate support bolt 11, a fixed support plate 12, a pressure plate rubber pad 13, and a pressure plate fixing bolt 14. The improvable design point is that 4 sets of universal wheels can be installed at the bottom of the device base 1 to facilitate the handling of the entire device.

[0032] During the use of the present invention, the 24 screw piles at the bottom of the main reducer are aligned with the 24 through holes on the supporting base plate, and then the main reducer is placed on the supporting base plate. Four adjustable support rods are used to connect the support plate on the upper part of the main reducer. The length and angle of the support rods are adjusted by the threads of the adjustable support rods. The main reducer is tightened to prevent it from tipping over, and the main reducer transmission torsion plate is pressed by two sets of pressure plate assemblies to further fix it. The upper and lower two layers of rubber pads are used to isolate and buffer the main reducer, reduce the external force on the main reducer during transportation, and ensure the safety of the main reducer. The key design point of the present invention is to fix the helicopter main reducer at multiple points according to the structural characteristics of the helicopter main reducer, so that it always maintains a relatively stable state during transportation.

[0033] The above specific implementation methods or cases are only used to explain the technical solutions of the present invention, and are not intended to limit the present application. Any parts not described in detail are deemed to be conventional technical means or common knowledge in the field. A person of ordinary skill in the art should understand that based on the design concept of the present application, the technical solutions described in the aforementioned implementation methods should be adaptively modified, or some or all of the technical features therein should be replaced by equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixing device for the main reduction gear of a helicopter, characterized in that, It includes a device base, a support rod mounting seat base, a support rod mounting seat, an adjustable support rod, a support bottom plate, and a support base; four support rod mounting seat bases are respectively arranged at the four corners of the upper end surface of the device base, and each support rod mounting seat base is installed with a support rod mounting seat, the support rod mounting seat is connected to one end of the adjustable support rod, and the other end of the adjustable support rod is connected to the support plate on the upper part of the main reducer, and the length and angle of the support rod are adjusted by the thread of the adjustable support rod, so as to tighten the main reducer; The bottom of the support base is horizontal, and the upper end is at a certain inclination angle, so that the support base plate maintains the same inclination angle as the main reducer, ensuring that the main reducer is fixed, the rotor shaft is vertically upward, and the support base is fixedly connected to the device base; The support base plate has a large through hole in the center to ensure that the bottom of the main reducer can pass through without interference. There are multiple evenly distributed through holes on the circumference of the edge of the through hole, corresponding to the screw piles at the bottom of the main reducer. The support base plate is connected to the device base through two long screws; two sets of pressure plate assemblies are also provided on the support base plate to press the main reducer transmission torsion plate tightly; The pressure plate assembly includes a movable pressure plate, a pressure plate supporting bolts, a fixed support plate, a pressure plate rubber pad, and a pressure plate fixing bolts; the movable pressure plate is connected to the fixed support plate through the pressure plate fixing bolts, and the fixed support plate is connected to the supporting bottom plate through bolts. The movable pressure plate has a threaded hole at the rear end, which is connected to the pressure plate supporting bolts to realize the supporting and adjusting function of the rear end of the movable pressure plate, and a pressure plate rubber pad is pasted on the bottom of the front end of the movable pressure plate; the pressure plate supporting bolts are adjusted, and the front end of the movable pressure plate clamps the main reducer torsion transmission plate to realize the fixing function.

2. The helicopter main reduction gear fixing device according to claim 1, characterized in that, The adjustable support rod comprises a support rod body, two U-shaped connectors and two locking nuts, and can be connected by threads to achieve length and angle adjustment.

3. The helicopter main reducer fixing device according to claim 1, characterized in that The support rod mounting seat is inclined at a certain angle so that the axes of the adjustable support rods are on the same straight line.

4. The helicopter main reducer fixing device according to claim 3, characterized in that, The connection hole where the upper end of the support rod mounting seat is connected to the adjustable support rod contains a joint bearing, which facilitates fine adjustment of the adjustable support rod within a certain angle range.

5. The helicopter main reducer fixing device according to claim 1, characterized in that The device base comprises a bottom edge, an upper crossbeam and a bottom crossbeam, which are fixed by bolts. The upper crossbeam of the device base is connected to the support rod mounting seat base and fixed by bolts.

6. The helicopter main reducer fixing device according to claim 1, characterized in that, The support rod mounting seat base is also provided with a lifting ring for lifting the entire fixing device.

7. The helicopter main reducer fixing device according to claim 1, characterized in that, A rubber pad is arranged on the upper surface of the support bottom plate along the position of the central through hole.

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