Labor-saving variable pitch rod tool for improving variable pitch efficiency of propeller

Abstract

The invention relates to the technical field of aviation products, and discloses a labor-saving variable-pitch rod tool for improving the variable-pitch efficiency of a propeller, the labor-saving variable-pitch rod tool comprises an adapter seat and a variable-pitch rod arranged right above the adapter seat, the corresponding end of the variable-pitch rod is designed into a flat head shape, and circular grooves are uniformly formed in the surface of the variable-pitch rod; the positioning sleeve is arranged on the surface of the variable-pitch rod, a compression screw is additionally arranged on the surface of the positioning sleeve, the positioning sleeve is connected with the variable-pitch rod through a circular groove and the compression screw, a gasket is additionally arranged between the positioning sleeve and the compression screw, and the upper portion of the positioning sleeve is connected with a clamping sleeve; compared with the prior art, the tool is convenient to operate and screw through the flat-head-shaped design of the variable-pitch rod, the variable-pitch rod can stably move up and down in the rotating process through the threaded connection mode between the variable-pitch rod and the adapter, and the problem that a propeller inclines when a traditional paddle wrench rotates paddles is effectively solved; and the stability of the pitch changing process is improved.

Description

Technical Field

[0001] This invention relates to the field of aviation product technology, specifically to a labor-saving pitch control rod tooling for improving the pitch control efficiency of propellers. Background Technology

[0002] In aviation products, propeller pitch control is a key technology that adjusts the installation angle between the propeller blades and the plane of rotation to maintain the optimal matching state between the engine and the propeller. The tools used in its operation are directly related to the realization of the pitch control effect.

[0003] Existing technologies involve using a blade wrench to rotate the propeller blades to change pitch. However, this tool's force application method is not well-suited to the contact with the blades, resulting in an imbalance of force applied to the blades. This makes it difficult to maintain the overall balance of the propeller during rotation, causing it to tilt to one side and compromising the stability of the pitch-changing process, thus failing to meet practical operational requirements. Therefore, this paper proposes a labor-saving pitch-changing lever fixture to improve propeller pitch-changing efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a labor-saving pitch control rod fixture for improving the pitch control efficiency of propellers, thereby solving the aforementioned technical problem that causes the propeller blades to fail to obtain a balanced force when subjected to stress.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a labor-saving pitch control rod fixture for improving propeller pitch control efficiency, comprising:

[0006] The adapter seat and the pitch rod located directly above the adapter seat, with the corresponding end of the pitch rod having a flat head design. The pitch rod and the adapter seat are connected by a thread, and circular grooves are evenly formed on the surface of the pitch rod.

[0007] A positioning sleeve is provided on the surface of the pitch rod, and a clamping screw is added to the surface of the positioning sleeve. The positioning sleeve and the pitch rod are connected to the clamping screw through a circular groove, and a washer is added between the positioning sleeve and the clamping screw. A clamping sleeve is connected to the upper part of the positioning sleeve.

[0008] By engaging the clamping screw with the circular groove, the positioning sleeve and the adapter are kept in a fixed state. The washer achieves a buffer fit between the positioning sleeve and the clamping screw as the clamping screw tightens.

[0009] After the propeller is placed on the positioning sleeve, the positioning and limiting are achieved by driving the propeller through the clamping sleeve and bearing;

[0010] By turning the pitch lever with a wrench, the pitch lever moves up and down through the threaded connection with the adapter.

[0011] The up-and-down movement of the pitch control lever drives the movement of the internal structure of the propeller, which in turn drives the propeller blades to achieve pitch control.

[0012] Preferably, the circular groove has a multi-position design, and the distance between adjacent circular grooves on the pitch control rod is different. This multi-position design breaks the limitation of a single fixed distance; the different distances between adjacent circular grooves can accommodate propellers of various blade diameters and thicknesses without requiring replacement of core components such as the pitch control rod, greatly improving the versatility of the tooling. Simultaneously, the positional adjustment continues the original mechanical positioning logic, stably maintaining the relative position of the positioning sleeve and the adapter, ensuring structural stability during pitch control.

[0013] Preferably, the circular grooves are axially distributed on the surface of the pitch control rod, and the surface of the pitch control rod is marked with gear positions. The axial distribution of the circular grooves meets the mechanical transmission requirements of pitch adjustment, making the force on the positioning component more uniform and avoiding jamming during adjustment; the marking of the gear positions allows the operator to intuitively identify the current gear position without repeated measurement and confirmation, simplifying the operation process, reducing adjustment errors caused by gear position misjudgment, and improving work efficiency.

[0014] Preferably, the clamping sleeve has a symmetrical opening and closing design, and an elastic rubber gasket is embedded in the inner wall of the clamping sleeve. The symmetrical opening and closing structure ensures that the clamping force of the clamping sleeve on the propeller is evenly distributed in the circumferential direction, effectively preventing slight deviation of the propeller during pitch change and improving pitch change accuracy. The elastic rubber gasket has good elastic deformation capability, which can not only enhance the fit with the propeller surface, but also form a buffer during clamping, preventing the metal clamping sleeve from directly contacting and damaging the propeller surface. At the same time, it can also increase the coefficient of friction, further improving clamping stability.

[0015] Preferably, the clamping sleeve is equipped with locking bolts on both sides, and nuts are threaded onto the surfaces of the locking bolts. The locking bolts ensure that the opening and closing actions of both sides of the clamping sleeve are synchronized, avoiding the clamping sleeve from tilting due to uneven force on one side, thus ensuring the symmetry and reliability of clamping. The threaded nuts provide a stable locking force, preventing the clamping sleeve from loosening due to vibration during pitch change. Furthermore, the bolts do not need to be completely removed during installation and removal; simply loosening the nuts is sufficient to open and close the clamping sleeve, simplifying the operation process.

[0016] Preferably, the flat end of the pitch lever is provided with a lever arm extension sleeve, and the surface of the flat end of the pitch lever is uniformly provided with anti-slip serrations. The lever arm extension sleeve extends the lever arm of the pitch lever, which, according to the lever principle, can effectively reduce the force required to rotate the pitch lever, achieving labor-saving operation and reducing the labor intensity of the operator; the anti-slip serrations can increase the friction between the flat end of the pitch lever and tools such as wrenches, avoiding slippage during operation, ensuring uniform torque transmission, and reducing wear on tools and the flat end, thus extending the service life of the components.

[0017] Preferably, a pin connects the pitch rod and the lever arm extension sleeve, with the pin extending outward through the surfaces of both the pitch rod and the lever arm extension sleeve. This pin-connection method is simple and reliable, effectively transmitting the torque of the lever arm extension sleeve to the pitch rod, ensuring synchronized movement. When the lever arm extension sleeve is not needed, the pin can be removed to separate the two components without affecting the regular use of the flat end of the pitch rod, improving the flexibility and applicability of the structure. Furthermore, disassembly and installation are convenient and require no special tools.

[0018] Preferably, the upper part of the positioning sleeve is provided with an annular buffer groove, and the inner cavity of the annular buffer groove is provided with an annular elastic buffer pad. The annular elastic buffer pad can effectively buffer the impact force when the propeller is placed, avoid rigid collision between the positioning sleeve and the propeller, protect the surface of the propeller from scratches and other damage, and also reduce the structural damage of the positioning sleeve caused by the collision; the annular structure design makes the buffer force evenly distributed, ensuring the initial position stability of the propeller after placement, laying a good foundation for subsequent positioning and pitch change operations.

[0019] Preferably, the surface of the positioning sleeve is uniformly provided with radial fine-tuning screws, and a soft top block is installed at the corresponding end of the radial fine-tuning screws. The radial fine-tuning screws provide radial fine-tuning function for the positioning sleeve. When there is a slight deviation in the propeller installation reference, the position of the propeller can be accurately corrected by adjusting the screws, thereby improving the positioning accuracy and ensuring the pitch accuracy. The soft top block avoids the metal screws from directly contacting the propeller, preventing damage to the propeller surface. At the same time, the properties of the soft material can also increase the friction with the propeller, ensuring the stability of the position after fine-tuning.

[0020] Preferably, the lower part of the adapter seat is provided with an annular anti-slip groove, and a rubber anti-slip ring is added to the inner cavity of the annular anti-slip groove. The rubber anti-slip ring has a high coefficient of friction, which can significantly enhance the friction between the adapter seat and the placement surface, effectively resist the reaction force generated by the threaded transmission during the pitch change process, avoid the adapter seat from shifting or slipping, and ensure the stability of the operation process; the annular anti-slip groove provides a stable installation position for the rubber anti-slip ring, preventing the rubber anti-slip ring from falling off or shifting under force, and ensuring a long-lasting and reliable anti-slip effect.

[0021] Compared with the prior art, the present invention provides a labor-saving pitch control rod tooling for improving the pitch control efficiency of propellers, which has the following beneficial effects:

[0022] This labor-saving pitch control lever tooling improves propeller pitch control efficiency. The flat-head design of the pitch control lever makes it easy to operate and tighten. The threaded connection between the pitch control lever and the adapter seat enables the pitch control lever to move stably up and down during rotation, effectively avoiding the propeller tilting problem that occurs when rotating the propeller blade with a traditional blade wrench, and improving the stability of the pitch control process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the variable pitch rod structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the clamping sleeve structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the lever arm extension sleeve and its connection structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the positioning sleeve structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the adapter of the present invention.

[0029] In the diagram: 1. Pitch rod; 2. Positioning sleeve; 3. Clamping sleeve; 4. Washer; 5. Clamping screw; 6. Adapter seat; 7. Circular groove; 8. Linkage locking bolt; 9. Elastic rubber pad; 10. Lever arm extension sleeve; 11. Pin; 12. Annular buffer groove; 13. Annular elastic buffer pad; 14. Radial fine-tuning screw; 15. Annular anti-slip groove; 16. Rubber anti-slip ring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a technical solution: a labor-saving pitch control rod fixture for improving propeller pitch control efficiency, comprising: (see details) Figures 1-6 The adapter 6 and the pitch rod 1 located directly above the adapter 6, with the corresponding end of the pitch rod 1 having a flat head design. The pitch rod 1 and the adapter 6 are connected by a thread, and a circular groove 7 is evenly provided on the surface of the pitch rod 1.

[0032] Positioning sleeve 2 is provided on the surface of pitch rod 1, and a clamping screw 5 is added to the surface of positioning sleeve 2. Positioning sleeve 2 and pitch rod 1 are connected to clamping screw 5 through round groove 7. A washer 4 is added between positioning sleeve 2 and clamping screw 5, and a clamping sleeve 3 is connected to the upper part of positioning sleeve 2.

[0033] Through the threaded transmission between the pitch rod 1 and the adapter 6, the blades are driven to be uniformly stressed and pitched, avoiding propeller tilting and meeting the requirement of uniform pitch change for multiple blades.

[0034] By utilizing the flat-head design and threaded transmission structure of the pitch lever 1, the operating force during rotation is reduced, achieving effortless pitch change and improving ease of operation;

[0035] The positioning sleeve 2 and clamping sleeve 3, along with the cooperation between the circular groove 7 and the clamping screw 5, ensure the stability of the propeller position during pitch change, thus meeting the requirements for fixed-point pitch change.

[0036] The overall structure simplifies the pitch change operation process through the coordinated operation of various components, making it suitable for the actual use scenarios of propeller pitch change in aviation product manufacturing.

[0037] Please see Figure 2 The circular groove 7 has a multi-position design, and the distance between adjacent circular grooves 7 on the pitch lever 1 is different. The pitch lever 1, through the multi-position circular groove 7, cooperates with the clamping component to engage with the circular groove 7 at different positions, thereby driving the positioning sleeve 2 and the adapter 6 to adjust to different distances.

[0038] The circular grooves 7 are axially distributed on the surface of the pitch lever 1, and the surface of the pitch lever 1 is marked with gear positions. The axially distributed circular grooves 7 on the surface of the pitch lever 1 provide a clear engagement position for the positioning component. The operator selects the corresponding gear position of the circular groove 7 through the gear positions marked on the surface of the pitch lever 1, thereby driving the positioning structure to complete precise adjustment.

[0039] Please see Figure 3 The clamping sleeve 3 has a symmetrical opening and closing design, and the inner wall of the clamping sleeve 3 is embedded with an elastic rubber pad 9. The symmetrical opening and closing design of the clamping sleeve 3 achieves the wrapping of the propeller through the opening and closing action, and the elastic rubber pad 9 on the inner wall of the clamping sleeve 3 fits against the surface of the propeller as the clamping sleeve 3 closes.

[0040] The clamping sleeve 3 is equipped with locking bolts 8 on both sides, and nuts are threaded onto the surfaces of the locking bolts 8. The locking bolts 8 on both sides of the clamping sleeve 3 rotate synchronously, causing the opening and closing parts of the clamping sleeve 3 to move closer or further away. The rotating nuts engage with the threads of the locking bolts 8, causing the clamping sleeve 3 to remain in a closed clamping state.

[0041] Please see Figure 4 A lever arm extension sleeve 10 is added to the flat end of the pitch lever 1, and the surface of the flat end of the pitch lever 1 is uniformly provided with anti-slip serrations. The lever arm extension sleeve 10, through its cooperation with the flat end of the pitch lever 1, drives the pitch lever 1 to rotate around its axis. The anti-slip serrations on the surface of the flat end of the pitch lever 1 enhance the fit with the operating tool and help drive the pitch lever 1 to rotate stably.

[0042] A pin 11 connects the pitch rod 1 and the lever arm extension sleeve 10, and the pin 11 extends outward through the surfaces of both the pitch rod 1 and the lever arm extension sleeve 10. The pin 11 penetrates both the pitch rod 1 and the lever arm extension sleeve 10, so that the lever arm extension sleeve 10 and the pitch rod 1 form a synchronous linkage structure. When the lever arm extension sleeve 10 is subjected to force, it drives the pitch rod 1 to rotate through the pin 11.

[0043] Please see Figure 5 The upper part of the positioning sleeve 2 is provided with an annular buffer groove 12, and the inner cavity of the annular buffer groove 12 is provided with an annular elastic buffer pad 13. When the propeller is placed on the upper part of the positioning sleeve 2, the annular elastic buffer pad 13 in the annular buffer groove 12 first contacts the propeller, and bears the pressure of the propeller through its own deformation, thereby driving the positioning sleeve 2 to complete the initial support of the propeller.

[0044] Radial fine-tuning screws 14 are evenly distributed on the surface of the positioning sleeve 2, and soft top blocks are installed at the corresponding ends of the radial fine-tuning screws 14. The radial fine-tuning screws 14 on the surface of the positioning sleeve 2 drive the soft top blocks to move radially by rotation. After the soft top blocks contact the side of the propeller, they drive the propeller to make a small position adjustment.

[0045] Please see Figure 6 The adapter 6 has an annular anti-slip groove 15 at its lower part, and a rubber anti-slip ring 16 is added to the inner cavity of the annular anti-slip groove 15. The adapter 6 contacts the placement surface through the rubber anti-slip ring 16 in the lower annular anti-slip groove 15. The friction generated by the rubber anti-slip ring 16 restricts the displacement of the adapter 6, and works in conjunction with the force transmission during the pitch change process to drive the overall structure to work stably.

[0046] In this design: the adapter 6 contacts the placement surface through the rubber anti-slip ring 16 in the lower annular anti-slip groove 15. The friction generated by the rubber anti-slip ring 16 drives the adapter 6 to maintain a stable state. The clamping screw 5 cooperates with the circular groove 7 on the surface of the pitch rod 1, which drives the positioning sleeve 2 to maintain a fixed state with the adapter 6. The washer 4 causes the positioning sleeve 2 and the clamping screw 5 to be buffered and fitted together as the clamping screw 5 tightens.

[0047] The lever arm extension sleeve 10 is fitted with the flat end of the pitch rod 1, and the pitch rod 1 and the lever arm extension sleeve 10 are connected by a pin 11, so that the lever arm extension sleeve 10 and the pitch rod 1 form a synchronous linkage structure; the anti-slip teeth on the surface of the flat end of the pitch rod 1 enhance the fit with the operating tool and help drive the pitch rod 1 to rotate stably.

[0048] The propeller is placed on the upper part of the positioning sleeve 2. The annular elastic buffer pad 13 in the annular buffer groove 12 on the upper part of the positioning sleeve 2 bears the pressure of the propeller through its own deformation, and drives the positioning sleeve 2 to complete the initial support of the propeller. Rotate the radial fine adjustment screw 14 on the surface of the positioning sleeve 2 to drive the soft top block to move radially. After the soft top block contacts the side of the propeller, it drives the propeller to make a small position adjustment.

[0049] By synchronously rotating the linkage locking bolts 8 on both sides of the clamping sleeve 3, the opening and closing parts of the clamping sleeve 3 are brought closer together. The rotating nut engages with the thread of the linkage locking bolt 8, causing the clamping sleeve 3 to remain in a closed clamping state. The elastic rubber pad 9 on the inner wall of the clamping sleeve 3 comes into contact with the propeller surface as the clamping sleeve 3 closes. The positioning and limiting of the propeller are achieved by the clamping sleeve 3 and the bearing.

[0050] With the help of a wrench to turn the power arm extension sleeve 10, the power arm extension sleeve 10 drives the pitch rod 1 to rotate around the axis through the pin 11; the pitch rod 1 drives itself to move up and down through the threaded connection with the adapter 6, and the up and down movement of the pitch rod 1 drives the internal structure of the propeller to move, thereby driving the propeller blade to achieve pitch change action.

[0051] The screw drive between the pitch rod 1 and the adapter 6 drives the blade to be uniformly stressed and pitched; the positioning effect of the positioning sleeve 2 and the clamping sleeve 3 and the cooperation between the circular groove 7 and the clamping screw 5 drive the propeller to maintain a stable position during the pitch change process.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A labor-saving pitch control rod fixture for improving the pitch control efficiency of a propeller, characterized in that, include: The adapter (6) and the pitch rod (1) located directly above the adapter (6) are provided. The corresponding end of the pitch rod (1) is designed as a flat head. The pitch rod (1) and the adapter (6) are connected by a thread, and a circular groove (7) is evenly provided on the surface of the pitch rod (1). A positioning sleeve (2) is provided on the surface of the pitch rod (1), and a clamping screw (5) is provided on the surface of the positioning sleeve (2). The positioning sleeve (2) and the pitch rod (1) are connected to the clamping screw (5) through a circular groove (7), and a washer (4) is provided between the positioning sleeve (2) and the clamping screw (5). A clamping sleeve (3) is connected to the upper part of the positioning sleeve (2).

2. The force-saving pitch control rod fixture for improving propeller pitch control efficiency according to claim 1, characterized in that: The circular groove (7) is designed with multiple positions, and the distance between adjacent circular grooves (7) on the variable pitch rod (1) is different.

3. The force-saving pitch control rod fixture for improving propeller pitch control efficiency according to claim 2, characterized in that: The circular grooves (7) are axially distributed on the surface of the pitch rod (1), and the pitch rod (1) is marked with gear scale.

4. The force-saving pitch control rod fixture for improving propeller pitch efficiency according to claim 1, characterized in that: The clamping sleeve (3) has a symmetrical opening and closing design, and the inner wall of the clamping sleeve (3) is embedded with an elastic rubber pad (9).

5. The force-saving pitch control rod fixture for improving propeller pitch control efficiency according to claim 4, characterized in that: The clamping sleeve (3) is equipped with linkage locking bolts (8) on both sides, and the surface of the linkage locking bolts (8) is threaded with nuts.

6. The force-saving pitch control rod fixture for improving propeller pitch efficiency according to claim 1, characterized in that: The flat end of the variable pitch rod (1) is provided with a lever arm extension sleeve (10), and the surface of the flat end of the variable pitch rod (1) is uniformly provided with anti-slip teeth.

7. The force-saving pitch control rod fixture for improving propeller pitch efficiency according to claim 6, characterized in that: A pin (11) is connected between the pitch rod (1) and the lever arm extension sleeve (10), and the pin (11) extends outward through the surfaces of the pitch rod (1) and the lever arm extension sleeve (10).

8. The force-saving pitch control rod fixture for improving propeller pitch efficiency according to claim 1, characterized in that: The upper part of the positioning sleeve (2) is provided with an annular buffer groove (12), and the inner cavity of the annular buffer groove (12) is provided with an annular elastic buffer pad (13).

9. A force-saving pitch control rod fixture for improving propeller pitch efficiency according to claim 8, characterized in that: The surface of the positioning sleeve (2) is uniformly provided with radial fine-tuning screws (14), and a soft top block is installed at the corresponding end of the radial fine-tuning screws (14).

10. The force-saving pitch control rod fixture for improving propeller pitch efficiency according to claim 1, characterized in that: The lower part of the adapter (6) is provided with an annular anti-slip groove (15), and a rubber anti-slip ring (16) is added to the inner cavity of the annular anti-slip groove (15).

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