Tilting mechanism and aircraft

Abstract

The invention discloses a tilting mechanism and an aircraft. The tilting mechanism comprises a driver; the speed reduction assembly comprises a worm gear reducer and a planetary gear reducer; the worm gear reducer and the planetary gear reducer are respectively connected with the driver and the motion conversion assembly; the tilting shaft is connected to the motion conversion assembly; the motion conversion assembly is used for converting the rotation motion output by the speed reduction assembly into the tilting motion of the tilting shaft between at least two preset angle positions. According to the tilting mechanism, by adopting the combined configuration of the planetary gear reducer and the worm gear reducer, the advantages that the planetary gear reducer and the worm gear reducer are large in reduction ratio and compact in structure are fully played for speed reduction and torque increase, and the torque output to the motion conversion assembly by the driver is remarkably amplified; on the premise that the same tilting output torque requirement is met, a driver with the smaller size and the lighter weight can be selected, and compactness and light weight of the tilting mechanism can be achieved easily.

Description

Technical Field

[0001] This invention relates to the field of aircraft technology, and more particularly to a tilting mechanism and an aircraft. Background Technology

[0002] In the field of tilt-configuration electric vertical takeoff and landing (eVTOL) aircraft, the core component that enables the power nacelle to switch between VTOL and cruise modes is the tilt mechanism. The tilt mechanism typically consists of an actuator that serves as the power source and a linkage system. The linear or rotational motion output by the actuator is transmitted and amplified through the linkage mechanism, ultimately driving the nacelle to rotate around a fixed tilt axis, thereby completing the flight mode switch.

[0003] In existing technologies, the typical actuator of a tilting mechanism uses a drive chain consisting of a rotary motor, a parallel shaft gear reducer, and a ball screw connected in series. Specifically, the high-speed rotational motion output by the rotary motor is first initially reduced in speed and torque by the parallel shaft gear reducer, and then drives the ball screw pair to convert the rotational motion into linear reciprocating motion that pushes the connecting rod, thereby driving the nacelle to tilt through the linkage mechanism.

[0004] However, in order to output sufficient driving torque, existing tilting mechanisms often use larger power and larger specifications of rotary motors and transmission components in parallel shaft gear reducers, which increases the weight and volume of the actuators and even the entire tilting system, creating a fundamental contradiction with the aircraft's urgent need for weight reduction and efficiency improvement. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tilting mechanism and aircraft to solve the technical problem that the parallel shaft gear reducer of the existing tilting mechanism often uses a larger power and larger specification rotary motor and transmission components in order to output sufficient driving torque, which increases the weight and volume of the actuator and even the entire tilting system, and forms a fundamental contradiction with the urgent need of aircraft to reduce weight and increase efficiency.

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

[0007] The present invention provides a tilting mechanism, comprising: a driver; a reduction assembly including a worm gear reducer and a planetary gear reducer; a motion conversion assembly, wherein the worm gear reducer and the planetary gear reducer are respectively connected to the driver and the motion conversion assembly; and a tilting shaft connected to the motion conversion assembly; wherein the motion conversion assembly is used to convert the rotational motion output by the reduction assembly into tilting motion of the tilting shaft between at least two preset angular positions.

[0008] In some embodiments, the worm gear reducer includes a worm gear that is driven to the planetary gear reducer or the driver, and a worm wheel that is driven to the motion conversion component, the worm gear meshing with the worm wheel; wherein the single-stage reduction ratio of the worm gear reducer is in the range of [10, 80].

[0009] In some embodiments, the helix angle of the worm is less than or equal to the friction angle between the worm wheel and the worm.

[0010] In some embodiments, the planetary gear reducer is provided with at least one; When the number of planetary gear reducers is one, the input end of the planetary gear reducer is connected to the driver, and the output end of the planetary gear reducer is connected to the worm gear reducer. When the number of planetary gear reducers is greater than or equal to two, all the planetary gear reducers are connected in series, and the input end of one of the planetary gear reducers is connected to the driver, while the output end of the other planetary gear reducer is connected to the worm gear reducer.

[0011] In some embodiments, the motion conversion component includes a first motion component and a second motion component, the first motion component being connected to the deceleration component, and the second motion component being connected to the first motion component and the tilt shaft; The first motion component is used to convert the rotational motion output by the deceleration component into linear telescopic motion, and the second motion component is used to convert the linear telescopic motion output by the first motion component into rotational motion of the tilting shaft around its central axis.

[0012] In some embodiments, the first motion component includes a lead screw that is drively connected to the reduction component and a push rod that is rotatably connected to the second motion component, wherein the lead screw and the push rod are threaded together.

[0013] In some embodiments, the tilting mechanism further includes a guide sleeve, through which the push rod passes; a first limiting structure is provided on the outer side of the push rod, and a second limiting structure is provided on the inner peripheral wall of the guide sleeve to cooperate with the first limiting structure. The first limiting structure and the second limiting structure cooperate on the linear movement path of the push rod to limit the push rod to have a first limit position and a second limit position.

[0014] In some embodiments, the second motion component includes a rocker arm rotatably connected to the first motion component, the rocker arm being provided with mounting holes for mounting the tilt shaft.

[0015] In some embodiments, the tilting mechanism further includes a housing, in which the drive and the deceleration assembly are both disposed, and the housing is provided with a hinge structure for rotatably connecting with a frame in the aircraft.

[0016] In a second aspect, the present invention provides an aircraft including the tilting mechanism described in the first aspect, the aircraft further comprising: The frame is rotatably connected to the hinged structure of the tilting mechanism; A power unit, connected to the tilting shaft of the tilting mechanism, is used to provide aerodynamics for the aircraft; The tilting mechanism is used to drive the power unit to tilt between vertical take-off and vertical flight modes and cruise flight modes.

[0017] The tilting mechanism of this invention, by employing a combination of planetary gear reducers and worm gear reducers, fully leverages the advantages of planetary gear reducers and worm gear reducers—large reduction ratios and compact structures—to reduce speed and increase torque. This significantly amplifies the torque output from the driver to the motion conversion component, enabling the selection of a smaller and lighter driver while meeting the same tilting output torque requirements. This contributes to the compactness and lightweighting of the tilting mechanism.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first three-dimensional structure of the tilting mechanism according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the tilting mechanism according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the tilting mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the planetary gear reducer of the tilting mechanism according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the worm gear reducer of the tilting mechanism in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Driver; 2. Reduction assembly; 21. Planetary gear reducer; 211. Fixed gear ring; 212. Planetary carrier; 213. Needle roller; 214. Planetary gear; 215. Planetary shaft; 216. Sun gear; 22. Worm gear reducer; 221. Worm gear; 222. Worm; 223. Flat key; 224. Pin; 3. Motion conversion assembly; 31. First motion assembly; 311. Lead screw; 312. Push rod; 313. First limiting structure; 32. Second motion assembly; 321. Rocker arm; 4. Tilting shaft; 5. Housing; 51. Guide sleeve; 511. Second limiting structure; 52. Hinge structure. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] 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.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] Please see Figures 1-3 This invention provides a tilting mechanism, comprising: a driver 1; a reduction assembly 2, including a worm gear reducer 22 and a planetary gear reducer 21; a motion conversion assembly 3, wherein the worm gear reducer 22 and the planetary gear reducer 21 are respectively connected to the driver 1 and the motion conversion assembly 3; and a tilting shaft 4 connected to the motion conversion assembly 3; wherein the motion conversion assembly 3 is used to convert the rotational motion output by the reduction assembly 2 into tilting motion of the tilting shaft 4 between at least two preset angular positions.

[0029] Understandably, the driver 1 serves as the power source for the entire tilting mechanism, providing rotational power to the system. The reduction assembly 2 includes two reduction units: a worm gear reducer 22 and a planetary gear reducer 21, used to convert the high-speed, low-torque motion output from the driver 1 into low-speed, high-torque motion. The motion conversion assembly 3, connected after the reduction assembly 2, is responsible for converting the reduced rotational motion into the tilting motion of the tilting shaft 4. The tilting shaft 4, as the final actuator, achieves tilting motion between at least two preset angular positions under the drive of the motion conversion assembly 3.

[0030] In this embodiment, a combination of planetary gear reducer 21 and worm gear reducer 22 is used. By fully utilizing the advantages of planetary gear transmission, such as large single-stage reduction ratio, compact structure, and high transmission efficiency, speed reduction and torque amplification are achieved. The characteristics of worm gear 221 and worm 222 transmission, such as large single-stage reduction ratio and self-locking function, are used for speed reduction and power locking. This significantly amplifies the torque output from the driver 1 to the motion conversion component 3. Under the premise of meeting the same tilting output torque requirements, a driver 1 with lower power, smaller size, and lighter weight can be selected, reducing the mass and installation space of the driver 1. This helps to achieve compactness and lightweighting of the tilting mechanism, and thus has a positive effect on reducing the overall structural weight of the aircraft and improving its carrying efficiency.

[0031] Furthermore, the worm gear reducer 22 includes a worm 222 that is connected to the planetary gear reducer 21 or the driver 1, and a worm wheel 221 that is connected to the motion conversion component 3. The worm 222 meshes with the worm wheel 221. The single-stage reduction ratio of the worm gear reducer 22 is in the range of [10, 80].

[0032] It is understandable that in the worm gear reducer 22, the input end of the worm 222 can be selectively connected to the output end of the planetary gear reducer 21 or the output end of the driver 1, while the output end of the worm gear 221 is connected to the motion conversion component 3. In traditional tilting mechanisms, the single-stage reduction ratio of the parallel shaft gear reducer is no greater than 3, while in this embodiment, the single-stage reduction ratio of the planetary gear reducer 21 can be no greater than 11, and the single-stage reduction ratio of the worm gear reducer 22 can be 10~80. This allows the tilting mechanism of this embodiment to achieve a larger reduction ratio with a smaller structural size, thereby reducing the weight of the rotary motor and the actuator by lowering the output requirements of the rotary motor.

[0033] Specifically, the helix angle of the worm 222 is less than or equal to the friction angle between the worm wheel 221 and the worm 222.

[0034] It should be explained that the parallel shaft reducer and ball screw 311 in the existing technology cannot achieve a self-locking function. Traditional aircraft generally use electronic locks on the rotating motor for static locking, but electronic locks have poor impact resistance and cannot cope with the complex working conditions of the nacelle. Based on this, this embodiment, based on the inherent characteristics of the worm gear 221 and worm 222 transmission, limits the helix angle of the worm 222 to be less than or equal to the friction angle between the worm gear 221 and the worm 222. This ensures that when the driver 1 stops outputting power, the friction between the worm gear 221 and the worm 222 is sufficient to prevent the worm 222 from being driven in the opposite direction by the worm gear 221, thus achieving irreversibility of the transmission. This gives the tilting mechanism an inherent position holding capability when static or when power is interrupted, providing the tilting mechanism with a locking function that does not rely on external energy or additional braking devices. This simplifies the system structure, reduces potential failure points, and lowers control complexity.

[0035] In some embodiments, at least one planetary gear reducer 21 is provided; when there is only one planetary gear reducer 21, the input end of the planetary gear reducer 21 is connected to the driver 1, and the output end of the planetary gear reducer 21 is connected to the worm gear reducer 22; when there are two or more planetary gear reducers 21, all planetary gear reducers 21 are connected in series, and the input end of one planetary gear reducer 21 is connected to the driver 1, while the output end of the other planetary gear reducer 21 is connected to the worm gear reducer 22.

[0036] Understandably, when only one planetary gear reducer 21 is used, it serves as the sole planetary gear reduction unit, directly connected between the driver 1 and the worm gear reducer 22. When two or more planetary gear reducers 21 are used, they are connected in series, collectively forming a multi-stage reduction module between the driver 1 and the worm gear reducer 22.

[0037] like Figure 4As shown, specifically, the planetary reducer in this embodiment includes: a fixed gear ring 211, a planet carrier 212, needle rollers 213, planetary gears 214, a planetary shaft 215, and a sun gear 216. The sun gear 216 is connected to the output shaft of the driver 1. The fixed gear ring 211 is fixedly disposed relative to the sun gear 216. The planet carrier 212 is fixedly connected to the planetary shaft 215. The planetary gears 214 are rotatably mounted on the planetary shaft 215 via the needle rollers 213. The fixed gear ring 211 meshes with the planetary gears 214, and the planetary gears 214 mesh with the sun gear 216. When the driver 1 drives the sun gear 216 to rotate, the sun gear 216 drives the planetary gears 214 and the planet carrier 212 to revolve around the fixed gear ring 211. Simultaneously, the planetary gears 214 rotate around the planetary shaft 215 via the needle rollers 213. After the aforementioned transmission speed reduction and torque increase, the planet carrier 212 transmits the torque and rotational motion to the worm gear reducer 22.

[0038] like Figure 5 As shown, optionally, the worm gear reducer 22 also includes a key 223 and a pin 224, wherein the worm 222 is connected to the planet carrier 212 via the pin 224. During power transmission, the torque and rotational motion transmitted through the planet carrier 212 are transmitted to the worm gear 221 meshing with it via the worm 222. After being reduced in speed and increased in torque by the worm gear 221, the torque is transmitted to the motion conversion component 3 via the key 223.

[0039] In some embodiments, the motion conversion component 3 includes a first motion component 31 and a second motion component 32. The first motion component 31 is connected to the deceleration component 2, and the second motion component 32 is connected to the first motion component 31 and the tilting shaft 4. The first motion component 31 is used to convert the rotational motion output by the deceleration component 2 into linear telescopic motion, and the second motion component 32 is used to convert the linear telescopic motion output by the first motion component 31 into rotational motion of the tilting shaft 4 about its central axis.

[0040] The first motion component 31 receives the rotational motion output from the deceleration component 2 and converts it into linear reciprocating motion. Subsequently, the second motion component 32 converts the linear thrust or pull output from the first motion component 31 back into rotational motion through the lever principle, that is, drives the tilting shaft 4 to swing around its own axis at a limited angle.

[0041] Furthermore, the first motion component 31 includes a lead screw 311 that is connected to the reduction component 2 for transmission, and a push rod 312 that is rotatably connected to the second motion component 32, with the lead screw 311 and the push rod 312 being threadedly engaged.

[0042] Understandably, existing tilting mechanisms typically use ball screws 311 as the transmission mechanism for converting rotary motion to linear motion. However, ball screws 311 have low load-bearing capacity, often requiring larger specifications, which leads to a higher overall weight of the tilting mechanism. Therefore, this embodiment uses a threaded connection structure of a screw 311 and push rod 312 with a higher load-bearing capacity instead of the traditional ball screw 311 structure. This allows for greater axial load under the same external dimensions. This enables the selection of a smaller, lighter first motion component 31 composed of the screw 311 and push rod 312 while meeting the same output thrust requirements. This, in turn, creates a synergistic effect with the lightweight design of the reduction component 2, jointly contributing to a significant reduction in the overall weight of the tilting mechanism.

[0043] Specifically, the tilting mechanism also includes a guide sleeve 51, through which a push rod 312 passes; a first limiting structure 313 is provided on the outer side of the push rod 312, and a second limiting structure 511 that cooperates with the first limiting structure 313 is provided on the inner peripheral wall of the guide sleeve 51. The first limiting structure 313 and the second limiting structure 511 cooperate on the linear movement path of the push rod 312 to limit the push rod 312 to have a first limit position and a second limit position.

[0044] Optionally, the guide sleeve 51 is fixedly installed on the housing 5 of the tilting mechanism, or the guide sleeve 51 is part of the housing 5 of the tilting mechanism, and its internal channel is coaxial with the axis of the push rod 312. The push rod 312 passes through the guide sleeve 51 and can slide relative to it. The guide sleeve 51 not only guides the push rod 312 to prevent it from wobbling radially, but also serves as the carrier of the second limiting structure 511. Specifically, in this embodiment, the guide sleeve 51 is provided to guide and support the push rod 312, and a first limiting structure 313 and a second limiting structure 511 that can contact each other are respectively provided on the outer side of the mutually moving push rod 312 and the inner peripheral wall of the guide sleeve 51. When the push rod 312 moves to one end of its stroke, the first limiting structure 313 will contact the second limiting structure 511. Since the guide sleeve 51 is fixed, the reaction force generated by this contact will prevent the push rod 312 from continuing to move in that direction, thereby mechanically defining the two extreme positions of the linear motion of the push rod 312.

[0045] Optionally, the first limiting structure 313 can be a protrusion fixed to the push rod 312, and the second limiting structure 511 can be a groove or two stop surfaces machined on the inner wall of the guide sleeve 51. When the push rod 312 moves to a specific position, the protrusion contacts the groove wall at both ends of the groove or contacts the stop surfaces. Conversely, the first limiting structure 313 can also be a groove machined on the outer wall of the push rod 312, and the second limiting structure 511 can be a pin embedded in the inner wall of the guide sleeve 51. When the push rod 312 moves, the end face of the groove will contact the pin. In this embodiment, the first extreme position of the push rod 312 can correspond to the 0° tilt position of the power device, and the second extreme position can correspond to the 90° tilt position of the power device.

[0046] Furthermore, the second motion component 32 includes a rocker arm 321 rotatably connected to the first motion component 31, and the rocker arm 321 is provided with a mounting hole for mounting the tilt shaft 4. It is understood that one end of the rocker arm 321 is rotatably connected to the linear output end of the first motion component 31, and the other end is fixed to the tilt shaft 4 through the mounting hole. When the first motion component 31 performs a linear extension / retraction movement, it pushes or pulls one end of the rocker arm 321. Since the rocker arm 321 is fixed to the tilt shaft 4, and the tilt shaft 4 is restricted to rotation only on the aircraft, the linear movement of the push rod 312 will force the rocker arm 321 to drive the tilt shaft 4 to rotate together around the axis of the tilt shaft 4, thereby achieving a tilting motion.

[0047] In this embodiment, the linear thrust is converted into rotational torque about the tilting shaft 4 by the design of the rocker arm 321. Compared with the traditional complex linkage mechanism, the structure is simple and the force flow path is clear.

[0048] In some embodiments, the tilting mechanism further includes a housing 5, with the driver 1 and the deceleration assembly 2 all disposed within the housing 5. The housing 5 is provided with a hinge structure 52 for rotatably connecting with the frame in the aircraft. Optionally, the tilting shaft 4 and the hinge structure 52 are located at opposite ends of the tilting mechanism, and the tilting shaft 4 and the hinge structure 52 are respectively disposed in the fixed portion and the moving portion of the motion conversion assembly 3.

[0049] It is understood that in this embodiment, the driver 1 and the reduction assembly 2 are integrated and packaged in a unified housing 5. A hinge structure 52 is provided on the housing 5 and connected to the fixed part of the motion conversion assembly 3. At the same time, the tilting shaft 4 is connected to the moving part of the motion conversion assembly 3 and placed at both ends of the mechanism. When the driver 1 is started, the rotational motion output by the driver 1 passes through the planetary gear reducer 21 and the worm gear reducer 22 in sequence. After multi-stage speed reduction and torque increase, it is transmitted to the motion conversion assembly 3. The rotational motion is first converted into precise linear reciprocating motion by the first motion assembly 31. The linear motion of the push rod 312 pushes or pulls one end of the rocker arm 321. Since the other end of the rocker arm 321 is fixedly connected to the tilting shaft 4, and the entire mechanism is supported on the frame through the hinge point at the rear end of the housing 5, this linear force is converted into a torque that drives the tilting shaft 4 and its power device to rotate around the axis of the tilting shaft 4, thereby achieving tilting.

[0050] This invention provides an aircraft including a tilting mechanism. The aircraft further includes: a frame rotatably connected to a hinged structure 52 of the tilting mechanism; and a power unit connected to a tilting shaft 4 of the tilting mechanism for providing aerodynamics to the aircraft. The tilting mechanism drives the power unit to tilt between a vertical take-off / take-off mode and a cruise flight mode. Optionally, the vertical take-off / take-off mode corresponds to the vertical orientation of the power unit, and the cruise flight mode corresponds to the horizontal orientation of the power unit.

[0051] Optionally, the power unit in this embodiment can be a nacelle, a propeller, or a rotor; that is, the power unit in this embodiment can be any form of providing aerodynamics to an aircraft.

[0052] Optionally, the aircraft in this embodiment is an eVTOL aircraft, which can be a compound wing configuration or a multi-rotor configuration.

[0053] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A tilting mechanism, characterized in that, include: drive; Speed ​​reduction components, including worm gear reducers and planetary gear reducers; A motion conversion assembly, wherein the worm gear reducer and the planetary gear reducer are respectively connected to the driver and the motion conversion assembly; A tilting shaft is connected to the motion conversion component; The motion conversion component is used to convert the rotational motion output by the deceleration component into the tilting motion of the tilting shaft between at least two preset angular positions.

2. The tilting mechanism according to claim 1, characterized in that, The worm gear reducer includes a worm gear that is driven to the planetary gear reducer or the driver, and a worm wheel that is driven to the motion conversion component, wherein the worm gear meshes with the worm wheel; wherein the single-stage reduction ratio of the worm gear reducer is in the range of [10, 80].

3. A tilting mechanism according to claim 2, characterized in that, The helix angle of the worm is less than or equal to the friction angle between the worm wheel and the worm.

4. A tilting mechanism according to claim 1, characterized in that, The planetary gear reducer is provided with at least one; When the number of planetary gear reducers is one, the input end of the planetary gear reducer is connected to the driver, and the output end of the planetary gear reducer is connected to the worm gear reducer. When the number of planetary gear reducers is greater than or equal to two, all the planetary gear reducers are connected in series, and the input end of one of the planetary gear reducers is connected to the driver, while the output end of the other planetary gear reducer is connected to the worm gear reducer.

5. A tilting mechanism according to any one of claims 1-4, characterized in that, The motion conversion component includes a first motion component and a second motion component, the first motion component is connected to the deceleration component, and the second motion component is connected to the first motion component and the tilting shaft; The first motion component is used to convert the rotational motion output by the deceleration component into linear telescopic motion, and the second motion component is used to convert the linear telescopic motion output by the first motion component into rotational motion of the tilting shaft around its central axis.

6. A tilting mechanism according to claim 5, characterized in that, The first motion component includes a lead screw that is drively connected to the reduction component and a push rod that is rotatably connected to the second motion component, wherein the lead screw and the push rod are threadedly engaged.

7. A tilting mechanism according to claim 6, characterized in that, The tilting mechanism further includes a guide sleeve, through which the push rod passes. A first limiting structure is provided on the outer side of the push rod, and a second limiting structure that cooperates with the first limiting structure is provided on the inner peripheral wall of the guide sleeve. The first limiting structure and the second limiting structure cooperate on the linear movement path of the push rod to limit the push rod to have a first limit position and a second limit position.

8. A tilting mechanism according to claim 5, characterized in that, The second motion component includes a rocker arm rotatably connected to the first motion component, the rocker arm being provided with mounting holes for mounting the tilting shaft.

9. A tilting mechanism according to claim 1, characterized in that, The tilting mechanism also includes a housing, in which the drive and the deceleration assembly are both disposed. The housing is provided with a hinge structure for rotatably connecting with the frame in the aircraft.

10. An aircraft, characterized in that, The aircraft further includes the tilting mechanism as described in any one of claims 1-9, and further includes: The frame is rotatably connected to the hinged structure of the tilting mechanism; A power unit, connected to the tilting shaft of the tilting mechanism, is used to provide aerodynamics for the aircraft; The tilting mechanism is used to drive the power unit to tilt between vertical take-off and vertical flight modes and cruise flight modes.

Images