Tension-torsion integrated main reduction supporting rod connecting structure

Abstract

The utility model provides a main reducer supporting rod connecting structure integrating tension and torsion, and belongs to the technical field of helicopter structural design, in the structure, each main reducer connector is of a double-lug structure, and one main reducer connector is connected with two supporting rods; the top face and the side face of the main reducer left front connector are connected with the main reducer front supporting frame and one main reducer connecting band plate. The top face and the side face of the main reducer left rear connector are connected with the main reducer rear supporting frame and one main reducer connecting band plate. The top face and the side face of a main reducer right front connector are connected with a main reducer front supporting frame and one main reducer connecting band plate, and the top face and the side face of a main reducer right rear connector are connected with a main reducer rear supporting frame and one main reducer connecting band plate. A main reducer connecting band plate connected with the main reducer left front connector and the main reducer left rear connector is located on the left side of the heading direction. A main reducer connecting band plate connected with the main reducer right front connector and the main reducer right rear connector is located on the right side of the heading direction. The number of connecting joints can be reduced, the weight is reduced, and connection of the main reducing supporting rod integrating tension and torsion is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of helicopter structure design, especially relates to a main reduction strut connecting structure of tension and torsion integration. BACKGROUND

[0002] The main reduction strut connecting structure is used for supporting and installing the main reducer, the main reducer plays a role of a central force component in the helicopter, the main reducer directly bears all the forces and moments generated by the rotor and transmits the forces and moments to the machine body through the main reduction connecting point.

[0003] The main reducer is generally connected with the structure by the main reduction strut, and the intersection of the main reduction strut and the structure is arranged at the intersection of the frame beams in the prior art, the main reduction joint falls on the intersection of the platform and the frame beams, and the main reduction load is transmitted through the frame beams.

[0004] In the case that the main reducer is large in volume and the aircraft appearance is small, due to the space limitation, the intersection of the main reduction strut and the structure is arranged at the intersection of the platform and the skin, an angular joint is designed, and the main reduction load is transmitted through the skin, the platform, the frame and the bilge girder. In the prior art, the tension and compression rods and the anti-torsion rods do not intersect at the machine body structure, the machine body structure is respectively provided with the connecting points of the tension and compression rods and the anti-torsion rods, and the problem of a large number of connecting joints and a large weight exists. UTILITY MODEL CONTENTS

[0005] To solve the problem of a large number of connecting joints and a large weight in the prior art, the utility model provides a main reduction strut connecting structure of tension and torsion integration, which can reduce the number of connecting joints, reduce the weight, and meet the connection of the main reduction strut of tension and torsion integration. The technical scheme is as follows:

[0006] In the first aspect, a main reduction strut connecting structure of tension and torsion integration is provided, which comprises a main reduction left front joint 1, a main reduction left rear joint 2, a main reduction right front joint 3, a main reduction right rear joint 4, a main reduction front support frame 5, a main reduction rear support frame 6, a platform 7, a skin 8, four main reduction connecting band plates 9 and a bilge girder 15.

[0007] Each main reduction joint is a double-ear structure, and one main reduction joint connects two struts;

[0008] The top surface and the side surface of the main reduction left front joint 1 are connected with the main reduction front support frame 5 and one main reduction connecting band plate 9,

[0009] The top surface and the side surface of the main reduction left rear joint 2 are connected with the main reduction rear support frame 6 and one main reduction connecting band plate 9,

[0010] The top surface and the side surface of the main reduction right front joint 3 are connected with the main reduction front support frame 5 and one main reduction connecting band plate 9,

[0011] The top surface and the side surface of the main reduction right rear joint 4 are connected with the main reduction rear support frame 6 and one main reduction connecting band plate 9.

[0012] The main reduction connection strap plate 9 connected with the main reduction left front joint 1 and the main reduction left rear joint 2 is located on the left side of the heading direction;

[0013] The main reduction connection strap plate 9 connected with the main reduction right front joint 3 and the main reduction right rear joint 4 is located on the right side of the heading direction;

[0014] The left main reduction connection strap plate 9 is connected with the left skin 8, the left platform 7 and the left bilge girder 15;

[0015] The right main reduction connection strap plate 9 is connected with the right skin 8, the right platform 7 and the right bilge girder 15, so that the load can be diffused to the skin 8, the bilge girder 15 and the platform 7 through the main reduction connection strap plate 9.

[0016] Further, the side surface and the top surface of each main reduction joint are provided with an adjusting gasket 10, and the thickness of the adjusting gasket 10 is adjusted to adjust the ear position of the main reduction joint, so that the main reduction support rod can be correctly installed.

[0017] The side surface of the main reduction joint is connected with the main reduction front support frame 5 and the main reduction connection strap plate 9 through a bolt 16 and a nut 12, and a baffle 11 is arranged between the nut 12 and the main reduction front support frame 5 to realize mechanical anti-loosening (because the space of each main reduction joint is not open on the side surface), and the bolt head is provided with a fuse.

[0018] Further, a self-lubricating joint bearing 14 is arranged at the connection position of the main reduction joint and the support rod to avoid the support rod from being subjected to a lateral load.

[0019] The main reduction joint is made of high-strength steel material, which can effectively reduce the weight.

[0020] Optionally,

[0021] The top surface and the side surface of the main reduction left front joint 1 are connected with the main reduction front support frame 5 and one main reduction connection strap plate 9 through bolts,

[0022] The top surface and the side surface of the main reduction left rear joint 2 are connected with the main reduction rear support frame 6 and one main reduction connection strap plate 9 through bolts,

[0023] The top surface and the side surface of the main reduction right front joint 3 are connected with the main reduction front support frame 5 and one main reduction connection strap plate 9 through bolts,

[0024] The top surface and the side surface of the main reduction right rear joint 4 are connected with the main reduction rear support frame 6 and one main reduction connection strap plate 9 through bolts.

[0025] Optionally,

[0026] The left main reduction connection strap plate 9 is connected with the left skin 8, the left platform 7 and the left bilge girder 15 through rivets.

[0027] The right main reduction connecting belt plate 9 is connected with the right skin 8, the right platform 7 and the right bilge girder 15 through rivets.

[0028] The utility model discloses beneficial effect at least in:

[0029] 1. can satisfy the main reduction support rod connection of pull -twist integration;

[0030] 2. set up adjusting washer and guarantee main reduction support rod installation intersection position;

[0031] 3. the new bolt anti -unthreading form of baffle is used to play the function of anti -unthreading. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the structural schematic diagram of the utility model implementation;

[0033] Figure 2 It is the local enlarged view of the bilge girder and skin provided by the utility model embodiment;

[0034] Figure 3 It is the connection enlarged view of the main reduction left front joint provided by the utility model embodiment.

[0035] Wherein, 1-main reduction left front joint, 2-main reduction left rear joint, 3-main reduction right front joint, 4-main reduction right rear joint, 5-main reduction front support frame, 6-main reduction rear support frame, 7-platform, 8-skin, 9-main reduction connecting belt plate, 10-adjusting washer, 11-baffle, 12-nut, 13-split pin, 14-self-lubricating joint bearing, 15-bilge girder, 16-bolt, 17-washer. DETAILED DESCRIPTION

[0036] To make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely in conjunction with the drawings in the utility model embodiment below. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of the utility model protection.

[0037] The features and illustrative embodiments of each aspect of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely provided to give a better understanding of the present application. The present application is not limited to any particular described embodiment and covers all improvements, alternatives, and modifications that come within the spirit and scope of the present application. In the drawings and the following description, well-known structures and techniques have not been shown or described in detail in order to avoid unnecessarily obscuring the present application.

[0038] It should be noted that the features of the embodiments of the present application and the embodiments can be combined with each other without conflict, and each embodiment can be mutually referenced and quoted.

[0039] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Referring to Figure 1 and Figure 3 , an embodiment of the present application provides a main reduction support rod connecting structure of tension-torsion integration, mainly comprising a main reduction left front joint 1, a main reduction left rear joint 2, a main reduction right front joint 3, a main reduction right rear joint 4, a main reduction front support frame 5, a main reduction rear support frame 6, a platform 7, a skin 8, four main reduction connecting belt plates 9, adjusting gaskets 10, baffles 11, nuts 12, cotter pins 13, self-lubricating joint bearings 14, bilge girders 15, bolts 16, and gaskets 17.

[0041] The main reduction joint (the main reduction left front joint 1, the main reduction left rear joint 2, the main reduction right front joint 3, and the main reduction right rear joint 4) is a double-ear structure, and two support rods are connected with the ears.

[0042] The main reduction joint is connected with the main reduction front support frame 5, the main reduction rear support frame 6, and the main reduction connecting belt plate 9 on the top surface and the side surface by four bolts respectively,

[0043] The left main reduction connecting belt plate 9 is connected with the left skin 8, the left platform 7, and the left bilge girder 15, and the right main reduction connecting belt plate 9 is connected with the right skin 8, the right platform 7, and the right bilge girder 15. The load is diffused to the skin 8, the bilge girder 15, and the platform 7 through the main reduction connecting belt plate 9, as shown in Figure 2 .

[0044] The adjusting gasket 10 is arranged on the side surface and the top surface of each main reduction joint, and the thickness of the adjusting gasket 10 is adjusted to adjust the ear position of the main reduction joint, so that the main reduction support rod can be correctly installed. The adjusting gasket is designed on both sides of the main reduction joint, so that the center point of the support rod installation can be adjusted.

[0045] The side surface of the main reduction joint is connected with the front support frame 5 and the main reduction connecting strap plate 9 through the bolt 16 and the nut 12, and the baffle 11 is arranged between the nut 12 and the front support frame 5. The main reduction joint is not open in the side surface, and the baffle 11 is arranged at the nut end, so that mechanical anti-loosening is realized, and the bolt head is provided with a safety wire.

[0046] In an embodiment, the washer 17 is arranged between the nut 12 and the bolt 16, which plays a role of anti-skid and anti-loosening.

[0047] In an embodiment, the nut 12 and the cotter pin 13 can be used in cooperation, as shown in Figure 3 .

[0048] In an embodiment, the main reduction joint is provided with the self-lubricating joint bearing 14 at the connection position with the support rod, so that the support rod is prevented from being subjected to lateral load.

[0049] In an embodiment, the main reduction joint is made of high-strength steel material, so that the weight can be effectively reduced.

[0050] In an embodiment, the top surface and the side surface of the main reduction left front joint 1 are connected with the main reduction front support frame 5 and one main reduction connecting strap plate 9 through bolts,

[0051] The top surface and the side surface of the main reduction left rear joint 2 are connected with the main reduction rear support frame 6 and one main reduction connecting strap plate 9 through bolts,

[0052] The top surface and the side surface of the main reduction right front joint 3 are connected with the main reduction front support frame 5 and one main reduction connecting strap plate 9 through bolts,

[0053] The top surface and the side surface of the main reduction right rear joint 4 are connected with the main reduction rear support frame 6 and one main reduction connecting strap plate 9 through bolts.

[0054] In an embodiment, the main reduction connecting strap plate 9 on the left side is connected with the left side skin 8, the left side platform 7 and the left side bilge girder 15 through rivets;

[0055] The main reduction connecting strap plate 9 on the right side is connected with the right side skin 8, the right side platform 7 and the right side bilge girder 15 through rivets.

[0056] The main reduction is connected with the fuselage through eight support rods, the eight support rods are intersected at four positions of the fuselage, the eight support rods jointly transmit the lifting force and the counter torque of the rotor, the tension rod, the compression rod and the anti-twist rod are not distinguished, four main reduction joints are arranged at the corresponding positions of the fuselage, and each main reduction joint is connected with two support rods.

[0057] In summary, the main reduction support rod connecting structure with tension and torsion integration has the following advantages:

[0058] 1. The main reduction support rod intersection can be arranged at the intersection position of the skin and the platform, and the main reduction connection can be installed.

[0059] 2. Can adapt to two two intersection strut connection.

[0060] 3. Can adapt to pull twist integrated main reduction strut connection.

[0061] 4. A semi-closed cavity is not convenient to open the mechanical relaxation mode of the mouth pin.

[0062] 5. In the strut connection place, design self-lubricating joint bearing to avoid the strut from receiving lateral load.

[0063] 6. Design adjusting gasket on both sides of the main reduction joint, which is convenient for adjusting the installation center point of the strut.

[0064] 7. The main reduction joint adopts high-strength steel material, which can effectively reduce the weight.

[0065] 8. High-strength steel adopts cadmium titanium plating process, which can effectively avoid brittle fracture of high-strength steel.

[0066] 9. Lateral load is mainly transmitted by shear of top surface bolt, and vertical load is mainly transmitted by shear of side surface bolt, which can effectively avoid the problem that in traditional design, vertical load is mainly transmitted by tension of bolt, so that the bolt needs to be provided with larger tightening torque, and then the bolt diameter needs to be increased, and then the weight and space are increased.

[0067] 10. The bolt is only connected with the belt plate and the frame, and is not directly extruded with the skin, the belt plate is connected with the skin and the platform through multiple rivets to diffuse the load, which can avoid the extrusion damage of the platform and the skin caused by excessive concentrated load.

[0068] The above only expresses the embodiment of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. In addition, the parts not described in the utility model are conventional technology.

Claims

1. A tension-torsion integrated main strut connection structure, characterized in that, include: The main reducer has a left front joint (1), a left rear joint (2), a right front joint (3), a right rear joint (4), a front support frame (5), a rear support frame (6), a platform (7), a skin (8), four main reducer connecting plates (9), and a bilge (15). Each main reducer joint is a double-eared structure, and one main reducer joint connects two struts. The top and sides of the main reducer left front connector (1) are connected to the main reducer front support frame (5) and one main reducer connecting plate (9); the top and sides of the main reducer left rear connector (2) are connected to the main reducer rear support frame (6) and one main reducer connecting plate (9); the top and sides of the main reducer right front connector (3) are connected to the main reducer front support frame (5) and one main reducer connecting plate (9); the top and sides of the main reducer right rear connector (4) are connected to the main reducer rear support frame (6) and one main reducer connecting plate (9); and the main reducer... The main reduction connecting plate (9) connected to the left front reducer joint (1) and the left rear reducer joint (2) is located on the left side of the heading; the main reduction connecting plate (9) connected to the right front reducer joint (3) and the right rear reducer joint (4) is located on the right side of the heading; the left main reduction connecting plate (9) is connected to the left skin (8), the left platform (7) and the left bilge (15); the right main reduction connecting plate (9) is connected to the right skin (8), the right platform (7) and the right bilge (15).

2. The tension-torsion integrated main damping rod connection structure according to claim 1, characterized in that, Each main reducer is equipped with an adjusting shim (10) on its side and top.

3. The tension-torsion integrated main damping rod connection structure according to claim 1, characterized in that, The side of the main reducer connector is connected to the front support frame (5) and the main reducer connecting plate (9) by bolts (16) and nuts (12). A baffle (11) is provided between the nut (12) and the front support frame (5), and the bolt head is fitted with a fuse.

4. The tension-torsion integrated main damping rod connection structure according to claim 1, characterized in that, A self-lubricating spherical bearing (14) is provided at the connection between the main reducer and the strut.

5. The tension-torsion integrated main damping rod connection structure according to claim 1, characterized in that, The main reducing joint is made of high-strength steel.

6. The tension-torsion integrated main damping rod connection structure according to claim 1, characterized in that, The top and side surfaces of the left front connector (1) of the main reducer are connected to the front support frame (5) of the main reducer and a main reducer connecting plate (9) by bolts; the top and side surfaces of the left rear connector (2) of the main reducer are connected to the rear support frame (6) of the main reducer and a main reducer connecting plate (9) by bolts; the top and side surfaces of the right front connector (3) of the main reducer are connected to the front support frame (5) of the main reducer and a main reducer connecting plate (9) by bolts; the top and side surfaces of the right rear connector (4) of the main reducer are connected to the rear support frame (6) of the main reducer and a main reducer connecting plate (9) by bolts.

7. The tension-torsion integrated main damping rod connection structure according to claim 1, characterized in that, The left main reducing connecting strip plate (9) is connected to the left skin (8), the left platform (7), and the left bilge (15) by rivets; the right main reducing connecting strip plate (9) is connected to the right skin (8), the right platform (7), and the right bilge (15) by rivets.

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