Interlocking structure of coaxial contra-rotating upper automatic tilting device torque arm and blade main shaft

Abstract

The utility model discloses the interlocking structure of automatic tilt ware torsion arm and paddle main shaft connection of coaxial counter -paddle, specifically relates to interlocking technical field, including paddle main shaft, the outer wall of paddle main shaft is equipped with interlocking piece, and interlocking piece includes: two mountings are all clamped in the outer wall of paddle main shaft, and two mountings and located the position of one side of paddle main shaft installs dynamic balance counter weight, and the one side of dynamic balance counter weight is fixed in the insertion block. The utility model discloses interlocking piece, and two mountings symmetrically hold paddle main shaft, and dynamic balance counter weight supports the hook block through the insertion block, and the hook block is inserted with paddle main shaft and cooperates, and dynamic balance counter weight also will not displace, can keep the same rotational speed and angular position with paddle main shaft, and the stability and security of dynamic balance counter weight and paddle main shaft connection in the process of helicopter flight are greatly promoted, and the firmness of installation is higher.

Description

Technical Field

[0001] This utility model relates to the field of interlocking technology, and more specifically, to an interlocking structure for connecting the torque arm of the automatic swashplate on a coaxial counter-rotating propeller to the propeller main shaft. Background Technology

[0002] The torsion arm of the automatic swashplate is a key transmission component connecting its rotating ring and rotor shaft. Its core function is to ensure precise synchronization between the control input and rotor rotation. It acts like a rigid mechanical link, with one end fixed to the rotating ring that rotates synchronously with the rotor, and the other end hinged to the rotor hub or blade main shaft, thus "locking" the rotating ring and the blade main shaft together and keeping them at exactly the same speed and angular position.

[0003] Among existing publicly available documents, patent publication number CN206845370U discloses a connection device between the main shaft of a hydro-generator set and an automatic blade adjustment device. This technology uses an automatic blade adjustment device consisting of a high-voltage electro-hydraulic actuator, a blade servo, and a connecting seat. The connecting seat is a fixed component used to fix it to the generator main shaft below. A thrust head surrounds the outside of the generator main shaft, and the thrust head is fixed to the engine main shaft through an upper connecting bracket. It features a compact installation structure, convenient installation and adjustment, and safe, stable, and reliable operation. However, this technology still has the following problems.

[0004] The existing technical solution for installing the upper swashplate torque arm generally involves tightening bolts and anti-loosening nuts. The tightening force after tightening locks the upper swashplate torque arm and the rotor shaft together to achieve a rigid connection. This method has a risk: if the bolts and nuts loosen, or even if they loosen but do not fall off, the upper swashplate torque arm and the rotor shaft will not lock together, and the rigid connection will fail. If slippage or displacement occurs, the rotating ring will lose angular synchronization with the rotor, the control commands will be completely disordered, and the helicopter will immediately lose control. The anti-loosening installation is also not very secure. Utility Model Content

[0005] To overcome the aforementioned deficiencies of the prior art, this utility model provides the following technical solution: an interlocking structure connecting the torque arm of the automatic swashplate on a coaxial counter-rotating propeller to the propeller main shaft, comprising a propeller main shaft, wherein the outer wall of the propeller main shaft is provided with an interlocking component, the interlocking component comprising: Two mounting bases are clamped to the outer wall of the blade main shaft, and dynamic balance weights are installed on both mounting bases at one side of the blade main shaft. An insertion block is fixed to one side of the dynamic balance counterweight, and the insertion block is slidably connected to the mounting base; A hook block is fixed to one end of an insertion block, and the hook block is inserted into the blade main shaft.

[0006] In a preferred embodiment, the two mounting seats are symmetrically arranged about the blade main shaft, and the upper surfaces of the two mounting seats are arranged parallel to each other.

[0007] In a preferred embodiment, the upper surface of the dynamic balancing counterweight is higher than the upper surface of the mounting base, and the upper surface of the dynamic balancing counterweight is arranged parallel to the upper surface of the mounting base.

[0008] In a preferred embodiment, the insertion block and the dynamic balance counterweight are arranged vertically, and the bottom end of the hook block is lower than the bottom end face of the insertion block.

[0009] In a preferred embodiment, two screws are inserted into one side of the mounting base, and the dynamic balance counterweight is plugged into one of the screws. A sleeve nut is threaded onto the outer wall of the screw and located on one side of the mounting base. A snap fastener is installed on the upper surface of the sleeve nut, and an insertion post is fixed to the outer wall of the snap fastener.

[0010] In a preferred embodiment, the sleeve nut is rotatably connected to one of the mounting seats, and the vertical cross-sectional shape of the snap fastener is annular.

[0011] In a preferred embodiment, the insertion post is used to insert into the sleeve nut and the screw, and the cross-sectional shape of the insertion post is circular.

[0012] In a preferred embodiment, a guide post is fixed to the bottom end of the insertion post, and the diameter of the top end of the guide post is smaller than the diameter of its bottom end.

[0013] The technical effects and advantages of this utility model are as follows: 1. This utility model adopts an interlocking component. Two mounting seats symmetrically clamp the rotor shaft. The dynamic balance counterweight supports the hook block through the insertion block. The hook block is inserted and engaged with the rotor shaft. When the rotor shaft rotates, the centrifugal force makes the hook block hang more stably. Even if it loosens or falls off, the dynamic balance counterweight will not shift. It can maintain the same speed and angular position as the rotor shaft, effectively avoiding rigid connection failure. It greatly improves the stability and safety of the connection between the dynamic balance counterweight and the rotor shaft during helicopter flight, and the installation is more secure against falling off.

[0014] 2. This utility model uses a screw and a socket nut for threaded locking, and then uses a buckle to drive the insertion post and guide post to move down, so that the insertion post passes through the socket nut and screw, achieving through-limiting insertion. This avoids loosening of the socket nut and screw, improves the anti-drop performance, and adds almost no cost. It provides a more reliable guarantee for the connection between the upper automatic swashplate torque arm and the rotor blade main shaft, and enhances the safety of helicopter flight. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the interlocking structure connecting the torque arm of the coaxial counter-rotating propeller automatic swashplate and the propeller main shaft of this utility model.

[0016] Figure 2 This is a partial structural diagram of the vertical cross-section at the connection between the dynamic balancing counterweight and the screw of this utility model.

[0017] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0018] Figure 4 This is a partial structural diagram of the connection between the mounting base and the dynamic balance counterweight of this utility model.

[0019] The attached diagram is labeled as follows: 1. Blade main shaft; 2. Mounting base; 3. Dynamic balance counterweight; 4. Insertion block; 5. Hook block; 6. Screw; 7. Sleeve nut; 8. Press-fit; 9. Insertion post; 10. Guide post. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] like Figure 1 - Figure 4 The diagram shows an interlocking structure connecting the torsion arm of the automatic swashplate on a coaxial counter-rotating rotor to the rotor blade main shaft. This interlocking structure is equipped with an interlocking component. The interlocking component can maintain the same rotational speed and angular position as the rotor blade main shaft 1, effectively avoiding rigid connection failure and significantly improving the stability and safety of the connection between the dynamic balance counterweight 3 and the rotor blade main shaft 1 during helicopter flight. The specific structural configuration of the interlocking component is as follows.

[0022] Example 1: In this embodiment, as Figure 1 - Figure 3As shown, the outer wall of the propeller main shaft 1 is provided with an interlocking mechanism, which includes: two mounting seats 2, each clamped to the outer wall of the propeller main shaft 1; a dynamic balancing counterweight 3 installed on one side of each mounting seat 2; an insertion block 4 fixed to one side of the dynamic balancing counterweight 3, with a slidable connection between the insertion block 4 and the mounting seat 2; and a hook block 5 fixed to one end of the insertion block 4, with an insertion fit between the hook block 5 and the propeller main shaft 1. The two mounting seats 2 are symmetrically arranged about the propeller main shaft 1, and their upper surfaces are parallel to each other. The upper surface of the dynamic balancing counterweight 3 is higher than the upper surface of the mounting seat 2, and the upper surface of the dynamic balancing counterweight 3 is parallel to the upper surface of the mounting seat 2. The insertion block 4 is perpendicular to the dynamic balancing counterweight 3, and the bottom end of the hook block 5 is lower than the bottom end face of the insertion block 4.

[0023] In this embodiment, the interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller upper swashplate to the propeller main shaft is used. The dynamic balance counterweight (3) is the upper swashplate torsion arm, which has both dynamic balance counterweight and torque transmission functions. When the two mounting seats 2 are laterally clamped, the two mounting seats 2 clamp the outer wall of the propeller main shaft 1, and the two mounting seats 2 clamp the outside of the dynamic balance counterweight 3. The dynamic balance counterweight 3 supports the insertion block 4, the insertion block 4 supports the hook block 5, and the hook block 5 is inserted into the propeller main shaft 1. When the propeller main shaft 1 rotates, the propeller main shaft 1 can be hooked and interlocked through the hook block 5. During flight, even if an accident occurs and the weight becomes loose or falls off, the greater the centrifugal force, the higher the stability of the hook block 5. The dynamic balance counterweight 3 will not fall off or displace, and will maintain the same rotational speed and angular position. This adds an extra layer of protection for flight safety.

[0024] Example 2: In this embodiment, as Figure 2 - Figure 4 As shown, two screws 6 are inserted into one side of each mounting base 2. A dynamic balancing counterweight 3 is inserted into one of the screws 6. A sleeve nut 7 is threaded onto the outer wall of the screw 6, located on one side of the mounting base 2. A snap fastener 8 is mounted on the upper surface of the sleeve nut 7, and an insertion post 9 is fixed to the outer wall of the snap fastener 8. The sleeve nut 7 is rotatably connected to one of the mounting bases 2, and the snap fastener 8 has a circular vertical cross-section. The insertion post 9 penetrates the sleeve nut 7 and the screw 6, and has a circular cross-section. A guide post 10 is fixed to the bottom end of the insertion post 9, with the top diameter of the guide post 10 being smaller than its bottom diameter.

[0025] In this embodiment, the interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller's automatic swashplate to the propeller shaft works by adhering the insert post 9 to the outer wall of the guide post 10. Rotating the sleeve nut 7 engages with the screw 6, locking them together. The sleeve nut 7 is pressed against the mounting base 2. Moving the snap 8 downwards causes the insert post 9 to move downwards, which in turn moves the guide post 10 downwards. The guide post 10 is guided along the sleeve nut 7 into the screw 6. Thus, the insert post 9 is inserted into the sleeve nut 7 and the screw 6, achieving a through-hole, limiting insertion and preventing loosening. This secure locking of the insert post 9 with the sleeve nut 7 and the screw 6 improves the anti-fall-off operation. By optimizing the insertion operation of the sleeve nut 7 and the screw 6 with almost no additional cost, an extra layer of safety is added to flight safety.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller's automatic swashplate to the propeller blade main shaft, comprising the propeller blade main shaft (1), characterized in that: The outer wall of the blade main shaft (1) is provided with an interlocking component, the interlocking component comprising: Two mounting bases (2) are clamped on the outer wall of the blade main shaft (1), and dynamic balance weights (3) are installed on the two mounting bases (2) and on one side of the blade main shaft (1). An insertion block (4) is fixed to one side of a dynamic balance counterweight (3), and the insertion block (4) is slidably connected to the mounting base (2); The hook block (5) is fixed to one end of the insertion block (4), and the hook block (5) is inserted into the blade main shaft (1).

2. The interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller's automatic swashplate to the propeller main shaft according to claim 1, characterized in that: The two mounting bases (2) are symmetrically arranged about the blade main shaft (1), and the upper surfaces of the two mounting bases (2) are arranged in parallel.

3. The interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller's automatic swashplate to the propeller main shaft according to claim 1, characterized in that: The upper surface of the dynamic balancing counterweight (3) is higher than the upper surface of the mounting base (2), and the upper surface of the dynamic balancing counterweight (3) and the upper surface of the mounting base (2) are arranged parallel to each other.

4. The interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller's automatic swashplate to the propeller main shaft according to claim 1, characterized in that: The insertion block (4) is vertically positioned between the dynamic balance counterweight (3), and the bottom end of the hook block (5) is lower than the bottom end face of the insertion block (4).

5. The interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller's automatic swashplate to the propeller main shaft according to claim 1, characterized in that: Two screws (6) are inserted into one side of the mounting base (2), and the dynamic balance counterweight (3) is connected to one of the screws (6). A sleeve nut (7) is threadedly connected to the outer wall of the screw (6) and located on one side of the mounting base (2), and a buckle (8) is installed on the upper surface of the sleeve nut (7), and an insertion post (9) is fixed on the outer wall of the buckle (8).

6. The interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller's automatic swashplate to the propeller main shaft according to claim 5, characterized in that: The sleeve nut (7) is rotatably connected to one of the mounting seats (2), and the vertical cross-section of the buckle (8) is annular.

7. The interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller's automatic swashplate to the propeller main shaft according to claim 5, characterized in that: The insertion post (9) is used to insert into the sleeve nut (7) and the screw (6), and the cross-sectional shape of the insertion post (9) is circular.

8. The interlocking structure connecting the torsion arm of the coaxial counter-rotating propeller's automatic swashplate to the propeller main shaft according to claim 5, characterized in that: The bottom end of the insertion post (9) is fixed with a guide post (10), and the top diameter of the guide post (10) is smaller than its bottom diameter.

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