Electrically-driven large-torque integrated rotor wing folding actuating device

Abstract

The utility model belongs to the field of aircraft rotor folding, and discloses an electrically-driven large-torque integrated rotor folding actuating device which comprises a long cylindrical shell, a controller and a motor which are arranged in the middle section of the shell, the motor is a double-end output motor, the upper output end and the lower output end of the motor are connected with coaxial multi-stage speed reducers with the same stage number, and the coaxial multi-stage speed reducers are connected with the controller. Finally, the torques at the two ends of the motor are evenly transmitted to joints above and below the shell, and the joints above and below the shell are connected with folding pull rods of the rotor wings respectively. The electrically-driven large-torque integrated rotor wing folding actuating device is simple in structure, high in reliability and small in size, and has the functions of position feedback, mechanical limiting and emergency braking.

Description

Technical Field

[0001] The utility model belongs to the field of aircraft rotor folding, relates to an actuating device, and in particular to an electrically driven large-torque integrated rotor folding actuating device for an aircraft rotor folding system. Background Art

[0002] The core component of the rotor folding system is the folding actuator, whose primary function is to provide the power source for wing retraction and extension. Its key features are small size, light weight, and high output torque. With the development of more electric and all-electric aircraft, the reliability and lifespan requirements of the rotor folding actuator have further increased. The rotor folding actuator uses electric folding instead of the original hydraulic folding method, reducing the number of parts, simplifying the product structure, and increasing reliability.

[0003] However, the electric folding device requires a large torque, and the large torque requires a certain amount of reducer structure to be realized, which increases the volume of the structure. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes an electrically driven high-torque integrated rotor folding actuating device, which has a simple structure, high reliability, small size, and has the functions of position feedback, mechanical limit and emergency braking.

[0005] The technical solution of the utility model is as follows:

[0006] An electrically driven, high-torque, integrated rotor folding actuation device comprises a long cylindrical shell, with a controller and a motor located in the middle section of the shell. The motor is a double-end output motor, with the upper and lower output ends of the motor connected to coaxial multi-stage reducers of the same number of stages. Finally, the torque at both ends of the motor is evenly transmitted to the joints above and below the shell, and the joints above and below the shell are respectively connected to the folding pull rods of the rotor.

[0007] Furthermore, the coaxial multi-stage reducer includes: a four-stage reducer, a three-stage reducer, a two-stage reducer and a one-stage reducer. The three-stage reducer, the two-stage reducer and the one-stage reducer are coaxial and integrated on a planetary carrier. The four-stage reducer has an internal gear structure, and the outer ring of the four-stage reducer is connected to the joint above or below the shell.

[0008] Furthermore, the outer sides of the planet carriers of the three-stage reducer, the two-stage reducer and the one-stage reducer are matched with the inner surface of the shell in a spline structure.

[0009] Furthermore, the planetary carrier of the four-stage reducer is provided with a mechanical limiting device.

[0010] Furthermore, the planetary carrier of the four-stage reducer is provided with a micro switch. When the folding actuator reaches a specified position, the micro switch signal is triggered to the controller, and the motor stops operating.

[0011] Furthermore, a groove is provided on the spline inside the housing, and the groove serves as a passage for the power supply wires of the motor and the controller.

[0012] Technical effects of this utility model:

[0013] The utility model provides an electric-driven high-torque integrated rotor folding actuating device with simple structure, high reliability and small size, which has the functions of position feedback, mechanical limit and emergency braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a schematic diagram of an implementation of a rotor folding actuation device according to an embodiment of the present utility model;

[0016] Figure 2 yes Figure 1 Cross-sectional view;.

[0017] Among them, 1 is the housing, 2 is the four-stage reducer, 3 is the three-stage reducer, 4 is the two-stage reducer, 5 is the one-stage reducer, 6 is the controller, 7 is the motor, 8 is the angle sensor, 9 is the micro switch, 10 is the electrical connector, 11 is the joint, and 12 is the mechanical limit device. DETAILED DESCRIPTION

[0018] This section is an embodiment of the present invention, which is used to explain and illustrate the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the orientations or positional relationships in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or case referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, features defined as "first", "second" and the like may explicitly or implicitly include more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; mechanical connections, point connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0021] Example 1:

[0022] An electrically driven, high-torque integrated rotor folding actuation device comprises a long cylindrical shell 1, a controller 6 and a motor 7 arranged in the middle section of the shell 1, the motor 7 being a double-end output motor, the upper and lower output ends of the motor 7 being connected to a coaxial multi-stage reducer of the same number of stages, and finally the torque at both ends of the motor 7 being evenly transmitted to the joints 11 above and below the shell 1, the joints 11 above and below the shell 1 being respectively connected to the folding pull rods of the rotor.

[0023] The coaxial multi-stage reducer includes: a four-stage reducer 2, a three-stage reducer 3, a two-stage reducer 4 and a one-stage reducer 5. The three-stage reducer 3, the two-stage reducer 4 and the one-stage reducer 5 are coaxial and integrated on a planetary carrier. The four-stage reducer 2 is an internal gear structure, and the outer ring of the four-stage reducer 2 is connected to the joint 11 above or below the shell 1.

[0024] The outer sides of the planet carriers of the three-stage reducer 3 , the two-stage reducer 4 and the first-stage reducer 5 are matched with the inner surface of the housing 1 in a spline structure.

[0025] The planetary carrier of the four-stage reducer 2 is provided with a mechanical limiting device.

[0026] The planetary carrier of the four-stage reducer 2 is provided with a micro switch. When the folding actuator reaches a specified position, the micro switch signal is triggered to the controller, and the motor 7 stops operating.

[0027] Grooves are provided on the splines inside the housing 1 , and the grooves serve as passages for the power supply lines of the motor 7 and the controller 6 .

[0028] Example 2:

[0029] Figure 1 This is a schematic diagram of an implementation of a rotor folding actuation device according to one embodiment of the present invention.

[0030] refer to Figure 1 The rotor folding actuator consists of a shell 1, a four-stage reducer 2, a three-stage reducer 3, a two-stage reducer 4, a first-stage reducer 5, a controller 6, a motor 7, an angle sensor 8, a micro switch 9, an electrical connector 10, a joint 11, and a mechanical limit device 12. The controller 6 is connected to the electrical connector 10 through the keyway inside the shell 1. When the controller 6 receives an on-board instruction, the controller 6 drives the motor 7 to work, and transmits the motor torque through the reducer 5, reducer 4, reducer 3, and reducer 2 to the product output joint 11, driving the rocker mechanism to rotate. When the output shaft reaches the limit position, the micro switch 9 triggers a signal and feeds back to the controller 6, turning off the motor 7 to realize the unfolding and folding of the rotor. During the operation of the product, the angle sensor 8 detects the output shaft angle and feeds back to the controller 6 to monitor the working status of the product.

[0031] When an unexpected situation occurs during the rotor folding process, the machine sends an emergency brake command to the controller 6, and the motor 7 suspends work to achieve emergency braking. After the machine sends the resumption of work command, the motor 7 continues to work and the rotor completes folding or unfolding.

[0032] When the controller 6 fails during the rotor folding process, the mechanical limit device 12 on the planetary carrier of the four-stage reducer works, and mechanical limit is achieved when the output shaft reaches the limit position to protect other components of the rotor folding system.

[0033] Example 3:

[0034] The utility model uses a small-sized motor as the power output source of the rotor folding actuator, and the controller is integrated with the motor through relevant interfaces. The motor and controller are installed in the middle of the folding actuator, and are dual-axis outputs. When the controller receives an aircraft signal, it drives the motor to actuate, and the motor torque is output to the product output shaft through a four-stage coaxial reduction structure. The rotation of the output shaft of the rotor folding actuator drives the rocker mechanism to rotate. When the output shaft reaches the specified position, it triggers the microswitch signal to be fed back to the controller, and the motor stops working, completing the folding and unfolding of the rotor. When an unexpected situation occurs during the rotor folding process, after the aircraft issues an emergency braking command, the folding actuator suspends work to achieve emergency braking. After the aircraft issues a resumption of work command, the folding actuator continues to work, and the rotor completes folding or unfolding;

[0035] The motor's output torque is transmitted to the product's output shaft via a four-stage reduction mechanism. This mechanism boasts high torque capacity and a compact internal footprint. The four-stage reducer is designed coaxially, with the first three stages integrated onto a single planetary carrier, increasing strength while reducing the number of parts. The four-stage reducer is bolted to the housing, and a mounting interface is added to the outer ring gear to connect to the rotor folding lever, enabling the rotor to fold or unfold.

[0036] The angle sensor is integrated into the planetary carrier of the four-stage reducer to achieve real-time feedback of the rotor position during the folding process, improving product safety.

[0037] The rotor folding actuator generates significant counter-torque on the reducer during operation. A spline structure was added to the outer surface of the planetary carrier of the first three-stage reducer and the inner surface of the housing. The two are connected through the spline, ensuring strength while reducing the number of parts.

[0038] A mechanical limit device is added to the planetary carrier of the four-stage reducer. When the controller fails, the output shaft of the four-stage reducer can be limited when it reaches the limit position to protect other components of the rotor folding system.

[0039] A micro switch is added to the planetary carrier of the four-stage reducer. When the folding actuator reaches the specified position, the micro switch signal is triggered to the controller and the motor stops. The micro switch is set as an adjustment mechanism with a compensation function to avoid indirect damage to the micro switch due to vibration and impact.

[0040] Some grooves are set on the shell spline to reserve the power supply lines of the motor and controller to ensure that the power supply lines will not interfere with the shell during product installation;

[0041] An electrical connector mounting bracket is provided on the housing mounting flange, and the power supply line is connected to the electrical connector through the inner hole, thereby ensuring the installation strength of the electrical connector while reducing the installation space.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should all be included in the protection scope of the present invention.

Claims

1. An electrically driven, high-torque integrated rotor folding actuating device, characterized in that: The invention comprises a long cylindrical shell (1), a controller (6) and a motor (7) arranged in the middle section of the shell (1), the motor (7) being a double-end output motor, the upper output end and the lower output end of the motor (7) being connected to a coaxial multi-stage reducer of the same stage, and finally the torque of the two ends of the motor (7) being evenly transmitted to the joints (11) above and below the shell (1), and the joints (11) above and below the shell (1) being respectively connected to the folding pull rods of the rotor.

2. The electrically driven high-torque integrated rotor folding actuating device according to claim 1, characterized in that: The coaxial multi-stage reducer comprises: a four-stage reducer (2), a three-stage reducer (3), a two-stage reducer (4) and a one-stage reducer (5); the three-stage reducer (3), the two-stage reducer (4) and the one-stage reducer (5) are coaxial and integrated on a planetary frame; the four-stage reducer (2) has an internal gear structure; and the outer ring of the four-stage reducer (2) is connected to a joint (11) above or below a housing (1).

3. The electrically driven high-torque integrated rotor folding actuating device according to claim 2, characterized in that: The outer sides of the planet carriers of the three-stage reducer (3), the two-stage reducer (4) and the one-stage reducer (5) are matched with the inner surface of the housing (1) in a spline structure.

4. The electrically driven high-torque integrated rotor folding actuating device according to claim 2, characterized in that: The planetary frame of the four-stage speed reducer (2) is provided with a mechanical limiting device.

5. The electrically driven high-torque integrated rotor folding actuating device according to claim 2, characterized in that: The planetary frame of the four-stage speed reducer (2) is provided with a micro switch. When the folding actuating device reaches a specified position, the micro switch signal is triggered to the controller, and the motor (7) stops actuating.

6. The electrically driven high-torque integrated rotor folding actuating device according to claim 3, characterized in that: A groove is provided on the spline inside the housing (1), and the groove serves as a passage for power supply lines of the motor (7) and the controller (6).

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