An aircraft-grade ball screw drive actuator

Abstract

This utility model relates to the field of aerospace science and technology, and discloses an aerospace ball screw drive actuator, including a fixed plate. An automatic lubrication adding mechanism is fixedly connected to the top of the fixed plate, and a quick-connect mechanism is also fixedly connected to the top of the fixed plate. A bearing is fixedly connected inside the quick-connect mechanism. The automatic lubrication adding mechanism includes multiple support blocks, the bottom of which is fixedly connected to the top of the fixed plate. Motors are fixedly connected inside two of the support blocks, and pistons are fixedly connected to the drive ends of the motors. A connecting pipe is fixedly connected inside the other support block, and a connecting tube is fixedly connected to the other end of the connecting pipe. In this utility model, the motor drives the piston to move within the connecting pipe. The pressure difference causes a sliding plug inside the fixed pipe to actuate, drawing lubricating oil from the oil reservoir. The connecting column and the limiting plate slide along the limiting groove to ensure stable stroke.

Description

Technical Field

[0001] This utility model relates to the field of aerospace science and technology, and in particular to an aerospace screw drive actuator. Background Technology

[0002] An aviation screw drive actuator is an aviation-grade electromechanical actuator that uses a screw and nut mechanism as its core transmission component and is driven by a motor to convert rotary motion into precise linear motion. It is mainly used in key parts of aircraft flight control systems (such as control of control surfaces and flaps), landing gear retraction and extension, and cabin door opening and closing. By providing high-precision, high-load, and high-reliability linear drive force, it enables precise control of various moving parts of the aircraft, ensuring flight attitude adjustment, take-off and landing safety, and normal equipment operation.

[0003] An aviation screw-driven actuator is a high-precision electromechanical actuation device used in the aviation field. Its core mechanism, driven by a motor, efficiently converts rotary motion into linear motion through a screw-nut mechanism. It provides stable driving force and precise displacement control even in harsh aviation environments (such as wide temperature ranges, strong vibrations, and high pressure variations). It is widely used in critical components of aircraft flight control systems (such as the deflection adjustment of control surfaces, flaps, and slats), landing gear retraction and extension, and cabin door opening and closing. With its lightweight design, high load capacity, long lifespan, and high reliability, it directly impacts the attitude control accuracy and flight safety of aircraft, and is one of the core devices for achieving precise and reliable control of various moving parts of an aircraft.

[0004] Without an automatic lubrication system, the lubrication and maintenance of aerospace screw-driven actuators mainly rely on pre-lubrication design and regular manual maintenance. However, this brings some inherent problems: the lubrication of its core transmission components (screw and nut) depends entirely on the long-life grease injected during initial assembly. In long-term high-frequency operation, extreme temperature fluctuations, or vibration environments, the grease is prone to performance degradation due to shearing, evaporation, or leakage, leading to increased component wear, reduced transmission efficiency, and even the risk of jamming. At the same time, manual grease replenishment requires regular disassembly and maintenance, which not only increases maintenance costs and downtime but also affects the actuator's fitting accuracy due to operational errors during disassembly and assembly. Especially in special scenarios such as high altitude or field conditions, it is difficult to achieve timely and effective lubrication replenishment, which restricts the reliability and lifespan of the actuator. Therefore, an aerospace screw-driven actuator is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides an aviation ball screw drive actuator, which aims to improve the problem in the prior art that the performance of lubricating grease is easily degraded due to shearing, evaporation or leakage in long-term high-frequency operation, extreme temperature fluctuation or vibration environment, which leads to increased component wear, reduced transmission efficiency or even the risk of jamming.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An aviation ball screw drive actuator includes a fixed plate, an automatic lubrication adding mechanism fixedly connected to the top of the fixed plate, a quick connection mechanism fixedly connected to the top of the fixed plate, and a bearing fixedly connected inside the quick connection mechanism.

[0008] The automatic lubrication mechanism includes multiple support blocks. The bottom of each support block is fixedly connected to the top of a fixed plate. Two of the support blocks have motors fixedly connected inside, and pistons are fixedly connected to the drive end of the motors. Another support block has a connecting pipe fixedly connected inside, and a connecting tube is fixedly connected to the other end of the connecting pipe. Two fixed tubes are fixedly connected inside the connecting tube. Four limiting grooves are opened inside the fixed tube. A sliding plug is slidably connected inside the fixed tube. A connecting column is fixedly connected to the outside of the sliding plug. An oil storage assembly is fixedly connected to one end of the connecting tube.

[0009] As a further description of the above technical solution:

[0010] The quick-connect mechanism includes two housings. The bottoms of the two housings are fixedly connected to the top of the fixed plate. Two positioning posts are fixedly connected to the outside of the housings. A sliding post one is slidably connected inside the two positioning posts. Two springs are fixedly connected inside the sliding post one. A limiting ring is fixedly connected to the other end of the springs. A sliding post two is fixedly connected inside the limiting ring.

[0011] As a further description of the above technical solution:

[0012] The outer side of the limiting ring is slidably connected to the inside of the sliding column one, and one end of the sliding column one is fixedly connected to the limiting cover;

[0013] As a further description of the above technical solution:

[0014] The oil storage components all include an oil storage tank, the outside of which is fixedly connected to one end of the connecting pipe, and an oil inlet is fixedly connected to the top of the oil storage tank. A protective cover is slidably connected inside the oil inlet.

[0015] As a further description of the above technical solution:

[0016] The other end of the connecting tube is fixedly connected to the outside of the housing, and the outside of the piston is slidably connected to the inside of the connecting tube;

[0017] As a further description of the above technical solution:

[0018] The other end of the connecting column is fixedly connected to a limiting plate, and the outside of the limiting plate is slidably connected to the inside of the limiting groove;

[0019] As a further description of the above technical solution:

[0020] The outer side of the sliding column 2 is slidably connected to the inside of the spring, and the outer side of the limiting cover is slidably connected to the outside of the outer shell;

[0021] As a further description of the above technical solution:

[0022] The bearing has multiple gears rotatably connected inside, and multiple gears are rotatably connected inside the bearing on the other side.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the starting motor drives the piston to move in the connecting pipe. The pressure difference causes the sliding plug in the fixed pipe to move, drawing lubricating oil from the oil storage tank. The connecting column and the limiting plate slide along the limiting groove to ensure stable stroke. Adjusting the piston movement distance can achieve quantitative oil supply for lubrication of components such as bearings, gear one, and gear two.

[0025] 2. In this utility model, during testing, the quick-connect mechanism allows the sliding column two to be pressed, the limiting ring to compress the spring, and the limiting cover and sliding column one to be pulled out, thus opening the outer shell to inspect the internal components. During assembly, sliding column one is inserted into the positioning column, and the spring resets to lock the limiting cover into the outer shell, achieving quick disassembly and assembly and improving maintenance efficiency. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of an aviation screw drive actuator proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the housing of an aviation screw drive actuator proposed in this utility model;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0030] Legend:

[0031] 1. Fixed plate; 2. Automatic lubrication mechanism; 21. Support block; 22. Motor; 23. Piston; 24. Connecting pipe; 25. Connecting pipe; 26. Fixed pipe; 27. Sliding plug; 28. Connecting column; 29. ​​Limiting groove; 210. Limiting plate; 211. Oil storage assembly; 2111. Oil storage tank; 2112. Oil inlet; 2113. Protective cover; 3. Quick connection mechanism; 31. Housing; 32. Positioning column; 33. Limiting cover; 34. Sliding column one; 35. Spring; 36. Limiting ring; 37. Sliding column two; 4. Bearing; 5. Gear one; 6. Gear two. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1 to 3 This utility model provides an embodiment of an aviation ball screw drive actuator, including a fixed plate 1. The fixed plate 1 serves as the basic support structure of the entire actuator, providing a stable mounting platform for other components. An automatic lubrication mechanism 2 is fixedly connected to its top, which can realize automatic and quantitative lubrication replenishment, effectively reducing manual maintenance costs and improving the timeliness and accuracy of lubrication. A quick-connect mechanism 3 is also fixedly connected to the top of the fixed plate 1, which enables quick assembly and disassembly of components, facilitating the inspection and maintenance of the internal structure and greatly shortening maintenance time. A bearing 4 is fixedly connected inside the quick-connect mechanism 3, which can reduce the frictional resistance of rotating components and ensure smooth transmission.

[0034] The automatic lubrication mechanism 2 includes multiple support blocks 21. Each support block 21 supports and fixes components such as the motor 22. Its bottom is fixedly connected to the top of the fixing plate 1, providing stable support for the mechanism. Two support blocks 21 have motors 22 fixedly connected inside. The motors 22 are the power source. When automatic lubrication is needed, the motors 22 are started. A piston 23 is fixedly connected to the drive end of the motor 22. The operation of the motor 22 drives the piston 23 to move within the connecting pipe 24, using the movement of the piston 23 to generate suction or thrust to transfer the lubricating oil. Another support block 21 has a connecting pipe 24 fixedly connected inside. The connecting pipe 24 serves as a channel for lubricating oil transfer, working with the piston 23 to deliver the oil. The other end of the connecting pipe 24 is fixedly connected to a connecting pipe 25, which is used to connect different... The oil circuit component serves to transfer and collect oil. The connecting pipe 25 has two fixed pipes 26 inside, which provide space and guidance for the sliding plug 27. The fixed pipes 26 have four limiting grooves 29 inside, which limit the movement range of the connecting post 28 and the limiting plate 210 to prevent them from detaching from the fixed pipes 26. The sliding plug 27 is slidably connected inside the fixed pipes 26. It is speculated that this should be "sliding plug" because the original text omitted it. The sliding plug can slide inside the fixed pipes 26 and cooperate with the piston 23 to realize the absorption and pushing of lubricating oil. The external of the sliding plug 27 is fixedly connected to the connecting post 28, which is used to connect the sliding plug 27 and the limiting plate 210 and transmit the sliding action. One end of the connecting pipe 25 is fixedly connected to the oil storage component 211, which is used to store lubricating oil.

[0035] All oil storage components 211 include an oil storage tank 2111, which is a container for storing lubricating oil. The external part of the oil storage tank 2111 is fixedly connected to one end of the connecting pipe 25 to ensure that the lubricating oil can be smoothly delivered to the oil circuit. The top of the oil storage tank 2111 is fixedly connected to an oil inlet 2112, which is used to replenish lubricating oil. The inside of the oil inlet 2112 is slidably connected to a protective cover 2113, which can prevent impurities from entering the oil storage tank 2111 and ensure the cleanliness of the lubricating oil.

[0036] The other end of the connecting post 28 is fixedly connected to the limiting plate 210. The limiting plate 210 can further limit the sliding range of the slide plug 27. The outside of the limiting plate 210 is slidably connected to the inside of the limiting groove 29. Under the guidance and restriction of the limiting groove 29, the connecting post 28 and the slide plug 27 are ensured to slide stably.

[0037] The bearing 4 has multiple gears 5 internally rotatably connected. Gears 5 can cooperate with other gears to realize power transmission and speed change functions. On the other side of the bearing 4, multiple gears 6 internally rotatably connected. Gears 6 and gears 5 work together to form a transmission system, which transmits power to the lead screw and other actuators to realize the driving function. During testing, the working status of these gears and bearing 4 can be conveniently checked through the quick connection mechanism 3.

[0038] Reference Figure 2 and Figure 4 The quick-connect mechanism 3 includes two outer shells 31, which provide protection and installation space for the internal structure. The bottom of the two outer shells 31 is fixedly connected to the top of the fixed plate 1 to ensure stable installation of the mechanism. Two positioning posts 32 are fixedly connected to the outside of the outer shells 31. The positioning posts 32 serve as positioning and guiding posts to facilitate the insertion and installation of the sliding post 34. The sliding post 34 is slidably connected inside the two positioning posts 32. The sliding post 34 can slide inside the positioning posts 32 to achieve connection or separation with the outer shell 31. Two springs 35 are fixedly connected inside the sliding post 34. The springs 35 provide elastic force and generate restoring force when the sliding post 37 is pressed. A limiting ring 36 is fixedly connected to the other end of the spring 35. The limiting ring 36 is used to limit the deformation range and position of the spring 35 and drive the sliding post 37 to move. The sliding post 37 is fixedly connected inside the limiting ring 36. The sliding post 37 is an operating component. Pressing it can cause the limiting ring 36 to drive the spring 35 to squeeze inward.

[0039] The external sliding connection of the limiting ring 36 is inside the sliding column 34. This connection method allows the limiting ring 36 to slide stably inside the sliding column 34. One end of the sliding column 34 is fixedly connected to the limiting cover 33. The limiting cover 33 can prevent the sliding column 34 from being over-inserted into the outer shell 31, and at the same time facilitates the insertion and removal of the sliding column 34.

[0040] The other end of the connecting pipe 25 is fixedly connected to the outside of the housing 31, so that the lubricating oil can be delivered to the parts that need lubrication, such as bearings 4, gears, etc.; the piston 23 is externally slidably connected to the inside of the connecting pipe 24. By sliding the piston 23 in the connecting pipe 24, the action of sucking and pushing the lubricating oil is realized, thereby completing the function of automatically adding lubricating oil.

[0041] The external sliding connection of slide column 37 is inside spring 35, so that slide column 37 can transmit force by squeezing spring 35; the external sliding connection of limit cover 33 is outside the outer shell 31, so that slide column 34 can be inserted or removed by operating limit cover 33 to achieve quick connection or separation.

[0042] Working principle: When automatic lubrication replenishment is required, motor 22 starts and drives piston 23 to reciprocate within connecting pipe 24. The pressure difference generated by the movement of piston 23, combined with the missing position of the sliding plug in fixed pipe 26, and the sliding of the supplementary sliding plug 27 according to function, can accurately draw lubricating oil from oil storage tank 2111. During the process, connecting column 28 moves with sliding plug 27, and limit plate 210 slides along limit groove 29, which not only ensures the stability of the stroke of sliding plug 27, but also realizes the quantitative delivery of lubricating oil by adjusting the moving distance of piston 23, accurately replenishing lubrication for transmission components such as bearing 4, gear 1 5, and gear 2 6, reducing mechanical wear, and improving the operating stability and life of actuator.

[0043] When inspecting bearing 4, gear 1 5, and gear 2 6, press slide pin 2 37. The limiting ring 36 is compressed, causing the spring 35 to contract. At this time, remove the limit cover 33, and slide pin 1 34 can be pulled out from the outer shell 31, releasing the connection between the outer shell 31 and the external structure. The outer shell 31 can be opened quickly, allowing technicians to visually inspect the condition of the internal transmission components and significantly shortening the maintenance preparation time. During assembly, slide pin 1 34 is inserted into the positioning pin 32. The spring 35 returns to its original position, pushing the limiting ring 36 and slide pin 2 37 back to their original positions. The limit cover 33 engages with the outer shell 31, quickly completing the connection and ensuring convenient maintenance and structural integrity of the actuator.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 aerostatic ball screw drive actuator comprising a fixed plate (1), characterized in that: An automatic lubrication adding mechanism (2) is fixedly connected to the top of the fixed plate (1), and a quick connection mechanism (3) is fixedly connected to the top of the fixed plate (1). A bearing (4) is fixedly connected inside the quick connection mechanism (3). The automatic lubrication mechanism (2) includes multiple support blocks (21). The bottom of the support block (21) is fixedly connected to the top of the fixed plate (1). Two of the support blocks (21) are fixedly connected to a motor (22). The drive end of the motor (22) is fixedly connected to a piston (23). The other support block (21) is fixedly connected to a connecting pipe (24). The other end of the connecting pipe (24) is fixedly connected to a connecting pipe (25). The connecting pipe (25) is fixedly connected to two fixed pipes (26). The fixed pipes (26) have four limiting grooves (29) inside. The fixed pipes (26) are slidably connected to a sliding plug (27). The sliding plug (27) is fixedly connected to a connecting column (28). One end of the connecting pipe (25) is fixedly connected to an oil storage assembly (211).

2. An aircraft screw drive actuator according to claim 1, wherein: The quick-connect mechanism (3) includes two housings (31). The bottom of the two housings (31) is fixedly connected to the top of the fixed plate (1). Two positioning posts (32) are fixedly connected to the outside of the housings (31). A sliding post (34) is slidably connected inside the two positioning posts (32). Two springs (35) are fixedly connected inside the sliding post (34). A limiting ring (36) is fixedly connected to the other end of the springs (35). A sliding post (37) is fixedly connected inside the limiting ring (36).

3. The aerospace screw drive actuator according to claim 2, characterized in that: The outer side of the limiting ring (36) is slidably connected to the inside of the sliding post (34), and one end of the sliding post (34) is fixedly connected to the limiting cover (33).

4. The aerospace screw drive actuator according to claim 1, characterized in that: Each of the oil storage components (211) includes an oil storage tank (2111), the outside of which is fixedly connected to one end of the connecting pipe (25), and the top of the oil storage tank (2111) is fixedly connected to an oil inlet (2112), and a protective cover (2113) is slidably connected inside the oil inlet (2112).

5. An aircraft screw drive actuator according to claim 2, characterized in that: The other end of the connecting tube (25) is fixedly connected to the outside of the housing (31), and the outside of the piston (23) is slidably connected to the inside of the connecting tube (24).

6. The aerospace screw drive actuator according to claim 1, characterized in that: The other end of the connecting column (28) is fixedly connected to a limiting plate (210), and the outside of the limiting plate (210) is slidably connected to the inside of the limiting groove (29).

7. An aircraft-grade lead screw drive actuator according to claim 3, characterized in that: The external sliding pin (37) is slidably connected to the inside of the spring (35), and the external sliding cap (33) is slidably connected to the outside of the outer shell (31).

8. The aerospace screw drive actuator according to claim 1, characterized in that: The bearing (4) is internally connected to a plurality of gears (5), and the bearing (4) is internally connected to a plurality of gears (6) on the other side.

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