A helicopter under-slung anti-sway device

Abstract

The utility model relates to the technical field of helicopter hanging, disclose a kind of helicopter hanging sway reduction equipment, including hanging and sway reduction device, the sway reduction device is fixed on the upper surface of hanging, for connecting helicopter and hanging;The sway reduction device includes fixed base, connecting rod, rolling piston rod, rolling piston head, rolling fixed link, pitch piston rod, pitch piston head and pitch fixed link.The present application is combined by innovative mechanical hydraulic structure and optional control strategy, effectively solve the problems, such as poor environmental adaptability of traditional electric control sway reduction system, dependence on accurate model, and heavy weight of complex structure sway reduction device, inflexible and other issues, provide a kind of high reliability, high efficiency, high adaptability and easily maintained helicopter hanging sway reduction solution.

Description

Technical Field

[0001] This utility model relates to the field of helicopter sling technology, specifically to a helicopter sling-reducing device. Background Technology

[0002] Helicopter sling transport plays an irreplaceable role in emergency rescue, engineering construction, and other fields. However, the swaying of the sling load has always been a key factor restricting the safety and efficiency of its operations. Traditional sway reduction methods have obvious limitations: for example, active control systems based on PID control have lag in response and are prone to overshoot oscillations under sudden wind disturbances; existing vision or inertial measurement units have insufficient measurement accuracy in strong vibration environments, leading to control closed-loop failure.

[0003] In recent years, related research has mainly focused on adaptive control algorithms based on reinforcement learning and the design of novel actuators, such as magnetorheological dampers or vector thrust compensation devices. However, these solutions still suffer from problems such as complex structures, high energy consumption, reliance on large amounts of training data, or insufficient real-time performance. For example, some existing patented solutions (such as CN116424555A) rely on high-precision sensors, which are prone to data drift in environments with strong electromagnetic interference; other solutions (such as CN119336057A) require precise measurement of the helicopter's center of gravity, and changes in weight distribution during actual flight can lead to parameter mismatch, requiring frequent manual calibration.

[0004] Therefore, it is necessary to provide a helicopter sling reduction device that is simple in structure, highly reliable, highly adaptable, and does not rely on complex sensor systems, so as to effectively suppress the swaying of the suspended object during flight and improve operational safety and efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a helicopter sling-mounted sway reduction device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A technical solution for a helicopter sling-down reduction device includes a sling and a sling-down reduction device, wherein the sling-down reduction device is fixed to the upper surface of the sling and is used to connect the helicopter and the sling. The sway reduction device includes a fixed base, a connecting rod, a rolling piston rod, a rolling piston head, a rolling fixed rod, a pitch piston rod, a pitch piston head, and a pitch fixed rod. The fixed base is fixedly connected to the suspended object; the connecting rod is provided with a round hole for connecting the sling; the rolling piston rod can rotate around the Y-axis and perform piston movement inside the rolling piston head; the rolling piston head can rotate around the rolling fixed rod; the pitch piston rod can rotate around the X-axis and perform piston movement inside the pitch piston head; the pitch piston head can rotate around the pitch fixed rod. Hydraulic damping suppresses changes in the attitude angle of the suspended object in the pitch and roll directions.

[0007] As a preferred technical solution, the sway reduction device adopts a hydraulic damper structure, in which the oil flows through the throttling orifice or small hole on the piston and dissipates the mechanical vibration energy through viscous friction.

[0008] As a preferred technical solution, the sway reduction device is suitable for single-point suspension and is connected to the helicopter via a single sling.

[0009] As a preferred technical solution, the sway reduction device can also be applied to two-point or multi-point suspension, with two or more sets of sway reduction devices fixed to the upper surface of the suspended object, and the fixed base and the suspended object being fixedly connected by bolts.

[0010] As a preferred technical solution, both the rolling piston head and the pitching piston head are hollow curved rod structures.

[0011] As a preferred technical solution, the sway reduction device can effectively suppress the swaying of the suspended object and maintain its stable attitude under gusts of wind or maneuvering flight conditions.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention relates to a helicopter sling-mounted damping device. It employs a purely mechanical hydraulic damping structure to reduce sling, eliminating the need for high-precision three-axis attitude sensors or complex electronic control systems. This allows for stable and reliable operation even in harsh environments such as strong electromagnetic interference, heavy rain, and water mist, fundamentally avoiding system failures caused by sensor data drift or malfunction, and significantly improving the system's robustness and environmental adaptability.

[0013] This invention eliminates the need for precise measurement or input of the helicopter's real-time center of gravity position, and is unaffected by changes in weight and center of gravity during flight due to fuel consumption, payload delivery, etc. It eliminates tedious manual calibration steps, reduces the difficulty of use and maintenance, and enhances its versatility under different types of helicopters and different mission payloads.

[0014] This invention effectively solves the problems of poor environmental adaptability, reliance on precise models, and large weight and inflexibility of complex sway reduction devices in traditional electronically controlled sway reduction systems by combining an innovative mechanical-hydraulic structure with optional control strategies. It provides a highly reliable, efficient, adaptable and easy-to-maintain helicopter sway reduction solution. Attached Figure Description

[0015] Figure 1 A schematic diagram of a single-point suspension structure for a helicopter suspension and sway reduction device; Figure 2 A schematic diagram of a sway reduction device for a helicopter-mounted sway reduction equipment; Figure 3 This is a schematic diagram of a dual-point suspension structure for a helicopter-mounted anti-sway device.

[0016] In the attached diagram, the following are the reference numerals: 1. Hanging object; 2. Swing reduction device; 21. Fixed base; 22. Connecting rod; 23. Rolling piston rod; 24. Rolling piston head; 25. Rolling fixed rod; 26. Pitch piston rod; 27. Pitch piston head; 28. Pitch fixed rod. Detailed Implementation

[0017] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples.

[0018] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a technical solution for a helicopter suspension and sway reduction device: it includes a suspended object 1 and a sway reduction device 2. The sway reduction device 2 is fixed to the upper surface of the suspended object 1 and is used to connect the helicopter and the suspended object 1.

[0019] The sway reduction device 2 specifically includes a fixed base 21, a connecting rod 22, a rolling piston rod 23, a rolling piston head 24, a rolling fixed rod 25, a pitch piston rod 26, a pitch piston head 27, and a pitch fixed rod 28. The fixed base 21 is fixedly connected to the suspended object 1 with bolts to ensure a stable connection. The connecting rod 22 has a round hole for connecting a sling, facilitating connection with a helicopter sling.

[0020] The rolling piston rod 23 can rotate around the Y-axis and perform piston movement within the rolling piston head 24, which in turn can rotate around the rolling fixed rod 25. Similarly, the pitch piston rod 26 can rotate around the X-axis and perform piston movement within the pitch piston head 27, which can rotate around the pitch fixed rod 28. This design enables the anti-sway device 2 to effectively suppress the attitude angle changes of the suspended object 1 in the pitch and roll directions through hydraulic damping.

[0021] In practical implementation, the sway reduction device 2 adopts a hydraulic damper structure. When the oil flows through the throttling orifice or small hole on the piston, the mechanical vibration energy is dissipated through viscous friction, thereby achieving the sway reduction effect.

[0022] The anti-sway device 2 of this invention is suitable for single-point suspension, connected to the helicopter via a single sling. Simultaneously, the anti-sway device 2 can also be used for two-point or multi-point suspension. In two-point or multi-point suspension, two or more sets of anti-sway devices 2 are fixed to the upper surface of the suspended object 1, and the fixed base 21 is bolted to the suspended object 1 to ensure the stability of the suspended object 1 during flight.

[0023] Both the rolling piston head 24 and the pitching piston head 27 are hollow crank rod structures. This design makes the piston head more flexible during rotation and also helps to improve the sway reduction effect.

[0024] In practical applications, the anti-sway device 2 of this invention can effectively suppress the swaying of the suspended object 1 and maintain its stable attitude under gusts of wind or maneuvering flight conditions. Compared with the prior art, this invention uses a pure mechanical hydraulic damping structure to achieve anti-sway, without relying on high-precision three-axis attitude sensors or complex electronic control systems, thus having higher reliability and environmental adaptability.

[0025] Furthermore, this invention eliminates the need for precise measurement or input of the helicopter's real-time center of gravity position, and is unaffected by weight and center of gravity changes during flight due to fuel consumption, payload delivery, etc., thus saving tedious manual calibration steps and reducing the difficulty of use and maintenance. This makes this invention highly versatile for different types of helicopters and different mission payloads.

[0026] This invention effectively solves the problems of poor environmental adaptability, reliance on precise models, and large weight and inflexibility of traditional electronically controlled sway reduction systems by combining an innovative mechanical-hydraulic structure with optional control strategies. It provides a highly reliable, efficient, adaptable, and easy-to-maintain helicopter sway reduction solution.

[0027] The working principle and usage process of this utility model: After assembling the various components of this solution in sequence, work according to the above implementation methods according to actual needs to complete all working steps.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A helicopter-mounted sway reduction device, characterized in that, It includes a suspended object (1) and a sway reduction device (2), the sway reduction device (2) being fixed to the upper surface of the suspended object (1) for connecting the helicopter and the suspended object (1). The sway reduction device (2) includes a fixed base (21), a connecting rod (22), a rolling piston rod (23), a rolling piston head (24), a rolling fixed rod (25), a pitch piston rod (26), a pitch piston head (27), and a pitch fixed rod (28). The fixed base (21) is fixedly connected to the hanging object (1); the connecting rod (22) is provided with a round hole for connecting the sling; the rolling piston rod (23) can rotate around the Y-axis and perform piston movement in the rolling piston head (24); the rolling piston head (24) can rotate around the rolling fixed rod (25); the pitch piston rod (26) can rotate around the X-axis and perform piston movement in the pitch piston head (27); the pitch piston head (27) can rotate around the pitch fixed rod (28); Hydraulic damping suppresses changes in the attitude angle of the suspended object in the pitch and roll directions.

2. The helicopter sway reduction device according to claim 1, characterized in that: The sway reduction device (2) adopts a hydraulic damper structure. The oil flows through the throttle hole or small hole on the piston and dissipates the mechanical vibration energy through viscous friction.

3. The helicopter suspension sway reduction device according to claim 1, characterized in that: The sway reduction device (2) is suitable for single-point suspension and is connected to the helicopter by a sling.

4. The helicopter suspension and sway reduction device according to claim 1, characterized in that: The sway reduction device (2) can also be used in two-point or multi-point hanging form, with two or more sets of sway reduction devices fixed on the upper surface of the hanging object (1), and the fixed base (21) and the hanging object (1) are fixedly connected by bolts.

5. The helicopter suspension and sway reduction device according to claim 1, characterized in that: Both the rolling piston head (24) and the pitching piston head (27) are hollow curved rod structures.

6. The helicopter sling-mounted anti-sway device according to claim 1, characterized in that: The anti-sway device (2) can effectively suppress the swaying of the suspended object and maintain its stable attitude under gusts of wind or maneuvering flight conditions.

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