CN216943544U

CN216943544U - Helicopter rotary wing axial counterweight device with anti-loosening effect

Info

Publication number: CN216943544U
Application number: CN202220665522.3U
Authority: CN
Inventors: 张瑞芳; 孟程; 孙涛; 韩述宏; 田刚印
Original assignee: Beijing Zhz Technology Co ltd
Current assignee: Beijing Zhz Technology Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-07-12
Anticipated expiration: 2032-03-25

Abstract

The utility model relates to a helicopter rotating spanwise counterweight device with a looseness-preventing effect, belongs to the technical field of helicopter rotating spanwise counterweights, and solves the problems that (1) threaded holes are directly machined in a paddle clamp to destroy the continuity of materials of the paddle clamp, and (2) the size and cost of raw materials are increased by increasing boss looseness prevention at the head of a bolt. The paddle clamp comprises a paddle bolt limiting block and a paddle spanwise counterweight component, wherein the paddle bolt limiting block is arranged at the end part of the paddle clamp and connected with a paddle bolt, and the paddle spanwise counterweight component is connected with the paddle bolt limiting block. The utility model has good counterweight effect, is beneficial to fatigue stress of the paddle clamp, reduces the size of raw materials and has the anti-loosening effect.

Description

Helicopter rotary wing axial counterweight device with anti-loosening effect

Technical Field

The utility model relates to the technical field of helicopter rotary wing spanwise counterweight, in particular to a helicopter rotary wing spanwise counterweight device with an anti-loosening effect.

Background

The purpose of helicopter rotor balancing is to reduce the imbalance of mass force and aerodynamic force of the rotor caused by manufacturing deviation and use through the adjustment of the adjustable part of the rotor, thereby reducing the vibration level of the whole helicopter. Generally, balance adjustment is classified into cone adjustment (vertical vibration) and dynamic balance adjustment (horizontal vibration), and dynamic balance is classified into chord-wise balance weight and span-wise balance weight.

The connection between the blade and the hub is generally completed by the aid of a blade bolt, the position of the blade bolt bears large alternating load, and thread failure of the part can cause serious consequences to the helicopter, so that the blade bolt is safe and reliable in looseness prevention.

The common installation mode of the spanwise counterweight on the helicopter is realized by directly processing a threaded hole on a paddle clamp and installing a counterweight block by using a screw; the anti-loosening of the blade bolt of the helicopter is realized by increasing a limit boss on a blade clamp and by relying on a locking gasket. But the continuity of the material of the paddle clamp is damaged by directly processing threaded holes on the paddle clamp; the anti-loosening mode of the lug boss added on the head of the bolt increases the size and cost of raw materials.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing analysis, an embodiment of the present invention is directed to a helicopter rotating span directional counterweight device with anti-loosening effect, so as to solve the following problems: (1) the screw holes are directly machined on the paddle clamp to destroy the continuity of the material of the paddle clamp, and (2) the bolt head increases the looseness prevention of the lug boss, so that the size and the cost of raw materials are increased.

The purpose of the utility model is mainly realized by the following technical scheme:

the utility model provides a have locking effect's helicopter span to counter weight device soon concurrently, includes paddle bolt stopper and paddle exhibition to counter weight subassembly, the tip that the oar pressed from both sides is located to paddle bolt stopper to with paddle bolted connection, the paddle exhibition to counter weight subassembly with paddle bolt stopper is connected.

Furthermore, first grooves are formed in two ends of the upper portion of the blade bolt limiting block.

Further, the bottom of the first groove is provided with a blade bolt hole.

Further, one side surface of the head of the paddle bolt is attached to the side wall of the first groove.

Further, the side wall attached to the side face of the head of each blade bolt is perpendicular to the central connecting line of the two blade bolt holes.

Furthermore, a protrusion is arranged between the two first grooves, and one side wall of each first groove is used as one side face of the protrusion and is attached to the side face of the head of the paddle bolt.

Further, a second groove is formed in the top of the protrusion, and the protrusion is provided with a through hole communicated with the second groove.

Further, the through hole penetrates through the protrusion.

Further, the through hole is perpendicular to a line connecting centers of the two blade bolt holes.

Further, the paddle spanwise counterweight assembly comprises a paddle spanwise counterweight bolt, a paddle spanwise counterweight and a nut, the paddle spanwise counterweight is arranged on one side of the protrusion, and the nut is arranged in the second groove and connected with the paddle spanwise counterweight bolt.

Compared with the prior art, the utility model can realize at least one of the following beneficial effects:

(1) the utility model integrates the installation of the spanwise counterweight of the paddle and the anti-loosening of the hexagonal head of the paddle bolt, realizes the required functions without increasing the size of the raw material of the paddle clamp, reduces the cost and reduces the number of parts.

(2) The first groove is formed in the blade bolt limiting block to form a gasket structure, so that a gasket is not needed between the head of the blade bolt and the blade clamp, the number of parts is reduced, one side surface of the head of the blade bolt is attached to the side wall of the first groove, the rotation of the blade bolt is limited, and the anti-loosening effect is achieved.

(3) The protrusion is arranged between the two first grooves, the looseness prevention of the paddle bolt is realized through the protrusion in the middle of the paddle bolt limiting block, the protrusion is not required to be arranged on the paddle clamp, and the size and the cost of raw materials of the paddle clamp are reduced.

In the utility model, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, wherein like reference numerals are used to designate like parts throughout.

FIG. 1 is a schematic structural view of a blade bolt stop block of a helicopter rotating span-wise counterweight device according to an embodiment;

FIG. 2 is a schematic view (A) of the connection relationship between the helicopter rotating span-wise counterweight device and the paddle clip according to the embodiment

FIG. 3 is a schematic view of the connection relationship between the span-wise counterweight device and the blade clamp of the helicopter according to the embodiment;

fig. 4 is a schematic view (iii) of the connection relationship between the rotating span-wise counterweight device and the blade clamp of the helicopter according to the specific embodiment.

Reference numerals:

1-a blade bolt stop block; 11-a first groove; 12-blade bolt holes; 13-a bump; 14-plane; 15-curved surface; 16-a second groove; 17-a through hole; 2-a blade spanwise counterweight assembly; 21-blade span-wise counterweight bolts; 22-paddle spanwise counterweight; 23-a nut; 3-paddle clamp; 4-blade bolts; 5-paddle self-locking nut; 6-blade bolt locking washer.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the utility model serve to explain the principles of the utility model and not to limit its scope.

In the description of the embodiments of the present invention, it should be noted that the term "connected" is to be understood broadly, and may be, for example, fixed, detachable, or integrally connected, and may be mechanically or electrically connected, and may be directly or indirectly connected through an intermediate medium, unless otherwise specifically stated or limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.

The utility model discloses a helicopter rotating wingspan directional counterweight device (hereinafter referred to as a helicopter rotating wingspan directional counterweight device) with a looseness-proof effect, which is shown in figures 1-4 and comprises a blade bolt limiting block 1 and a blade spanwise counterweight component 2, wherein the blade bolt limiting block 1 is arranged at the end part of a blade clamp 3 and is connected with a blade bolt 4, and the blade spanwise counterweight component 2 is connected with the blade bolt limiting block 1.

In order to place the paddle bolt 4, the two ends of the upper part of the paddle bolt limiting block 1 are provided with first grooves 11, the first grooves 11 are communicated with the end face of the paddle bolt limiting block 1, and a paddle bolt hole 12 is formed in the bottom of each first groove 11.

In this embodiment, be equipped with first recess 11 on paddle bolt stopper 1 in order to form the gasket structure, when laying paddle bolt 4, in first recess 11 was located to the head of paddle bolt 4, the bottom surface of the head of paddle bolt 4 and the tank bottom direct contact of first recess 11 for no longer need the gasket between the head of paddle bolt 4 and the oar clamp 3, reduced the quantity of part.

In order to avoid loosening of the paddle bolt 4, the distance from the center of the paddle bolt hole 12 to one side wall of the first groove 11 is equal to the diameter of an inscribed circle of the head of the paddle bolt 4, so that one side surface of the head of the paddle bolt 4 is attached to the side wall of the first groove 11, rotation of the paddle bolt 4 is limited, and a looseness-proof effect is achieved. In the present embodiment, the side wall that abuts against the side surface of the head portion of the paddle bolt 4 is perpendicular to the line connecting the centers of the two paddle bolt holes 12.

In this embodiment, be protruding 13 between two first recesses 11, the lateral wall of first recess 11 is as the side of protruding 13, realizes the locking of paddle bolt 4 through protruding 13 in the middle of paddle bolt stopper 1, need not to set up the boss on paddle clamp 3 and realizes to reduce the raw and other materials size and the cost of paddle clamp 3.

It is worth noting that hexagonal looseness prevention of the head of the blade bolt 4 is achieved by means of the bulge 13 in the middle of the blade bolt balancing weight 1, and partial thread looseness prevention of the screw rod of the blade bolt 4 is achieved by means of the blade self-locking nut 5 and the blade bolt locking gasket 6.

In order to avoid assembly errors of the blade bolt limiting block 1 during use, the blade bolt limiting block 1 is arranged in a fool-proof mode, one side face of the blade bolt limiting block 1 is arranged to be a plane 14, the other side face of the blade bolt limiting block is arranged to be a curved surface 15, the curved surface 15 is opposite to the plane 14, and the plane 14 is parallel to a central connecting line of the two blade bolt holes 12.

In order to mount the blade span-wise counterweight assembly 2, a second groove 16 is formed at the top of the protrusion 13, a through hole 17 is formed in the plane 14, and the through hole 17 is communicated with the second groove 16 and penetrates through the curved surface 15. In this embodiment, the second groove 16 is a T-shaped groove.

The paddle spanwise counterweight component 2 comprises a paddle spanwise counterweight bolt 21, a paddle spanwise counterweight 22 and a nut 23, the paddle spanwise counterweight 22 is arranged on the side of the plane 14, the nut 23 is arranged in the second groove 16 and connected with the paddle spanwise counterweight bolt 21, namely, the paddle spanwise counterweight bolt 21 penetrates through the paddle spanwise counterweight 22 and is connected with the nut 23 arranged in the second groove 16. It should be noted that the number of blade spanwise weights 22 may be adjusted according to the weight requirements.

In the embodiment, the bulge 13 part in the middle of the blade bolt limiting block 1 is effectively utilized, and the spanwise counterweight is arranged on the blade bolt limiting block 1, so that the function is realized, and the number of parts is reduced; the problem of through punching on oar clamp 3 realize that the counter weight of exhibition to balance and the destruction oar that leads to presss from both sides the material continuity, be unfavorable for oar clamp 3 fatigue atress is avoided.

It should be noted that if the spanwise counterweight does not need to be installed, the blade spanwise counterweight bolt 21, the blade spanwise counterweight 22, and the nut 23 do not need to be installed, if the spanwise counterweight needs to be installed, the blade spanwise counterweight is installed according to the position shown in the drawing, and if a plurality of (exemplarily, 6) blade spanwise counterweights 22 are installed, the blade or the hub itself still cannot be leveled, and the blade or the hub itself needs to be inspected.

Compared with the prior art, the helicopter rotating span-wise counterweight device provided by the embodiment has the advantages that the blade expanding counterweight is installed and integrated with the hexagonal head of the blade bolt in a locking manner, the required function is realized without increasing the size of the raw material of the blade clamp, the cost is reduced, and the number of parts is reduced.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims

1. The helicopter rotating span directional counterweight device with the anti-loosening effect is characterized by comprising a blade bolt limiting block (1) and a blade span directional counterweight component (2), wherein the blade bolt limiting block (1) is arranged at the end part of a blade clamp (3) and connected with a blade bolt (4), and the blade span directional counterweight component (2) is connected with the blade bolt limiting block (1).

2. The helicopter rotating span axial counterweight device with anti-loosening effect according to claim 1, characterized in that the blade bolt limiting block (1) is provided with first grooves (11) at both ends of the upper part.

3. The helicopter rotating span-wise counterweight device with anti-loosening effect according to claim 2, characterized in that the bottom of the first groove (11) is provided with a blade bolt hole (12).

4. A check-effect helicopter rotating-span axial counterweight device according to claim 3, characterized in that one side of the head of said blade bolt (4) is attached to the side wall of said first groove (11).

5. The helicopter rotating spanwise counterweight device with anti-loosening effect according to claim 3, characterized in that the side wall attached to the side of the head of the blade bolt (4) is perpendicular to the central line connecting the two blade bolt holes (12).

6. A helicopter rotating span-wise counterweight device with anti-loosening effect according to any one of claims 3 to 5, characterized in that between two first grooves (11) is a protrusion (13), one side wall of the first groove (11) is used as one side of the protrusion (13) and is attached to the side of the head of the blade bolt (4).

7. A helicopter rotating spanwise counterweight device with anti-loosening effect according to claim 6, characterized in that the top of said protrusion (13) is provided with a second groove (16), said protrusion (13) is provided with a through hole (17) communicating with said second groove (16).

8. The helicopter rotating spanwise counterweight device with anti-loosening effect according to claim 7, characterized in that said through hole (17) passes through said protrusion (13).

9. A check-effect helicopter rotating-wing spanwise counterweight according to claim 7 or 8, characterized in that said through hole (17) is perpendicular to the line connecting the centers of said two blade bolt holes (12).

10. The helicopter rotating spanwise counterweight device with anti-loosening effect according to claim 7 or 8, characterized in that the blade spanwise counterweight component (2) comprises a blade spanwise counterweight bolt (21), a blade spanwise counterweight (22) and a nut (23), the blade spanwise counterweight (22) is disposed on one side of the protrusion (13), and the nut (23) is disposed in the second groove (16) and connected to the blade spanwise counterweight bolt (21).