CN217146367U - Tilting type automatic variable-pitch propeller device - Google Patents

Abstract

The application discloses automatic variable pitch propeller device of formula of verting belongs to unmanned air vehicle technical field. The application discloses automatic variable pitch propeller device of formula of verting includes: a base body; the rotating motor is rotatably arranged on the seat body; the driving device is arranged on the base body, is connected with the rotating motor and is used for driving the rotating motor to rotate relative to the base body; the propeller hub is fixedly arranged on the rotating shaft; the blades are rotatably arranged on the hub, and passive blocks are arranged on the blades and deviate from the axes of the blades; the linkage variable-pitch assembly comprises a linkage piece and a variable-pitch piece, and the variable-pitch piece is connected with the driven block; the linkage part is connected with the variable-pitch part and the seat body. The tilting type automatic pitch-variable propeller device can realize that the propeller automatically changes the propeller pitch in the tilting process, so that the propeller has higher driving efficiency and is beneficial to improving the efficiency of a power system of a tilting rotor unmanned aerial vehicle; besides, the propeller has a compact structure and simple variable pitch control.

Description

Tilting type automatic variable-pitch propeller device

Technical Field

The application relates to the technical field of unmanned aerial vehicles, in particular to tilting type automatic variable pitch propeller device.

Background

A variable pitch propeller is a propeller that can change the blade angle in flight depending on the flight speed and altitude. In the takeoff stage, the advancing speed of the aircraft is low, and the blade angle of the propeller is reduced by the variable-pitch device, so that the engine works in the maximum rotating speed and the maximum power state, and the propeller generates the maximum pulling force; in the flat flight phase, the pitch-variable mechanism changes the pitch to a high pitch adapted to the flight state, so that the propeller can obtain the maximum useful power from the engine at the maximum rotation speed. This kind is applied to the fixed wing aircraft that the screw was fixed to be set up mostly.

In the field of tilt rotor aircrafts, the propellers can be arranged on the wings in a tilting mode, and in a vertical take-off state, the propellers tilt to a vertical state relative to the wings, so that the aircrafts can take off and land vertically; when the aircraft rises to a certain height, the propeller tilts relative to the wing from a vertical state to a horizontal straight state, so that the aircraft obtains flat flight capability. On this kind of aircraft, because structural constraint, the pitch-changing demand can't be compromise to the screw under the circumstances that the setting of verting, leads to the screw can't exert its maximum drive efficiency.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving one of the technical problems in the prior art. Therefore, the tilting type automatic pitch-variable propeller device can realize that the propeller automatically changes the propeller pitch in the tilting process, so that the propeller has higher driving efficiency, and the power system efficiency of the tilting rotor unmanned aerial vehicle is improved; besides, the propeller has a compact structure and simple variable pitch control.

The tilting type automatic variable pitch propeller device according to the present application comprises:

a base body;

the rotating motor is rotatably arranged on the seat body;

the driving device is arranged on the seat body, is connected with the rotating motor and is used for driving the rotating motor to rotate relative to the seat body;

the propeller hub is fixedly arranged on the rotating shaft;

the blades are rotatably arranged on the hub, and passive blocks are arranged on the blades in a manner of deviating from the axes of the blades;

the linkage variable-pitch assembly comprises a linkage piece and a variable-pitch piece, and the variable-pitch piece is connected with the driven block; the linkage piece is connected with the variable-pitch piece and the seat body;

when the rotating motor rotates relative to the base body, the linkage piece can enable the variable-pitch piece to drive the driven block to rotate along the axis of the blade, so that the change of the pitch of the blade is realized.

According to the tilting type automatic variable pitch propeller device of the embodiment of the application, at least the following beneficial effects are achieved:

the driving device is arranged on the base body and connected with the rotating motor, and is used for driving the rotating motor to rotate, so that the propeller device can tilt, and can be switched between a vertical state and a horizontal state. Simultaneously, set up linkage displacement subassembly, when the relative pedestal of rotating electrical machines rotates, the screw switches between vertical state and horizontality, the displacement spare can drive the paddle and change its pitch for the screw all possesses higher drive efficiency under the different flight state of aircraft. So set up, the linkage displacement subassembly can realize the linkage with drive arrangement, and displacement control is simple.

According to some embodiments of the present application, the pitch piece comprises a pitch lever and a pitch disc; the rotating shaft of the rotating motor is arranged in a hollow mode, and the variable-pitch rod penetrates through the hollow interior of the rotating shaft; the variable-pitch disc is arranged on the rotating shaft and is connected with the variable-pitch rod; the variable-pitch disc is provided with a slide way matched with the driven block, and the slide way is used for pushing the driven block to rotate along the axis of the paddle.

According to some embodiments of the present application, the passive block includes a connecting portion disposed perpendicular to the blade axis, and an abutting portion disposed on an end of the connecting portion away from the blade axis in the blade axis direction; the abutting part is inserted in the slideway.

According to some embodiments of the present application, the linkage member includes an arc-shaped sliding groove formed in the seat body, and a sliding member having one end connected to the variable pitch rod and the other end inserted into the sliding groove; the distances between each point on the sliding chute and the rotating axis of the rotating motor are different; the variable-pitch disc is sleeved on the rotating shaft in a sliding manner.

According to some embodiments of the present application, the ramp is an annular ramp disposed around a circumference of the pitch disk; and each passive block is matched with the annular slide way.

According to some embodiments of the application, the displacement pole with the inside rotation of cavity of pivot is connected the displacement pole with be connected with coupling assembling between the displacement dish, coupling assembling includes connecting seat and connecting rod, the connecting seat rotate set up in the displacement pole, the connecting rod both ends respectively with the connecting seat with displacement dish fixed connection.

According to some embodiments of the application, a limiting groove is arranged on the rotating shaft along the axial direction of the rotating shaft, and the connecting seat penetrates through the limiting groove.

According to some embodiments of the present application, the linkage member is an arc-shaped bevel rack disposed on the seat body, and a bevel gear disposed at one end of the pitch-variable rod, and the bevel gear is engaged with the bevel rack; the arc-shaped circle center of the conical rack and the rotating center of the rotating motor are positioned on the same axis; the variable-pitch disc is rotatably sleeved on the rotating shaft.

According to some embodiments of the present application, the ramp is a curved ramp disposed on a circumferential surface of the pitch disc, the curved ramp having two ends at different heights; the number of the curved slideways is consistent with that of the paddles.

According to some embodiments of the application, the driving device comprises a driving motor and a two-bar linkage, one end of the two-bar linkage is connected with the driving motor, and the other end of the two-bar linkage is connected with the rotating motor.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view of a tilting type automatic variable pitch propeller device according to an embodiment of the present application.

Fig. 2 is a front view of a tilting automatic variable pitch propeller device according to an embodiment of the present application.

Fig. 3 is a perspective view of a tilt type automatic variable pitch propeller device according to an embodiment of the present application.

Fig. 4 is a perspective view of a tilting type automatic variable pitch propeller device according to an embodiment of the present application.

Fig. 5 is a perspective view showing a specific structure of a pitch change member according to an embodiment of the present application.

FIG. 6 is a perspective view showing a specific structure of a pitch change member in an embodiment of the present application.

FIG. 7 is a perspective view of a blade according to an embodiment of the present application.

FIG. 8 is a perspective view of a pitch disk in an embodiment of the present application.

Fig. 9 is a perspective view showing a specific structure of a pitch change member in another embodiment of the present application.

Fig. 10 is a schematic view of a tilt automatic variable pitch propeller device in a horizontal state according to an embodiment of the present application.

Fig. 11 is a schematic view of a tilting automatic variable pitch propeller device in a switched state according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, left, right, front, rear, and the like, referred to as positional or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

The tilt type automatic variable pitch propeller device of the present application will be described below with reference to fig. 1 to 11.

Referring to fig. 1 to 4, the tilting automatic variable pitch propeller device of the present application includes:

a base body 100;

a rotating motor 200 rotatably installed on the base 100;

the driving device 300 is disposed on the base 100 and connected to the rotating electrical machine 200, and is configured to drive the rotating electrical machine 200 to rotate relative to the base 100;

a hub 400 fixedly disposed on the rotating shaft 210;

a plurality of blades 500, each blade 500 rotatably mounted to hub 400, and a passive block 510 mounted to blade 500 offset from its axis;

the linkage variable-pitch assembly 600 comprises a linkage member 610 and a variable-pitch member 620, wherein the variable-pitch member 620 is connected with the passive block 510; the link 610 connects the variable pitch part 620 and the seat body 100;

when the rotating electrical machine 200 rotates relative to the housing 100, the link 610 enables the pitch-varying member 620 to drive the driven block 510 to rotate along the axis of the blade 500, so as to realize the pitch variation of the blade 500.

It will be appreciated that the blade 500 is provided with several pieces, in general the blade 500 is provided with three pieces. Meanwhile, the seat 100 is fixedly disposed, and generally, the seat 100 is fixedly disposed on the wing. The rotating electrical machine 200 includes a base 220, and the base 220 is rotatably disposed on the base 100.

It can be understood that the driving device 300 is fixedly disposed on the base 100, and it may be a driving motor 310 and a gear assembly, the gear assembly includes a first gear disposed on the base 220 of the rotating motor 200 and a second gear disposed at the driving end of the driving motor 310, and the first gear and the second gear are engaged with each other; the driving device 300 may also be a driving motor 310 and a linkage assembly connecting the driving motor 310 and the base 220 of the rotating motor 200, which will be described in detail in the following embodiments.

When the driving device 300 drives the rotating motor 200 to rotate to the vertical state relative to the seat 100, the aircraft is in the vertical take-off and landing state; when the driving device 300 drives the rotating motor 200 to rotate to a horizontal state relative to the seat 100, the aircraft is in a horizontal flying state. So set up, the aircraft can possess vertical take-off and landing ability, and its level flies the state down propeller thrust big to can realize great cruise speed.

Linkage variable pitch assembly 600 includes a link 610 and a variable pitch member 620, wherein link 610 connects variable pitch member 620 to housing 100 and variable pitch member 620 connects link 610 to passive block 510 on blade 500. When the rotating electrical machine 200 rotates relative to the base 100, the link 610 drives the variable pitch part 620 to move, so that the variable pitch part 620 drives the driven block 510 on the blade 500 to rotate, and finally the pitch of the blade 500 is changed.

For example, the pitch-changing member 620 may be configured to be composed of a pitch-changing rod 621 and a pitch-changing disc 622, and the two ends of the pitch-changing rod 621 are connected to the pitch-changing disc 622 and the linkage 610, respectively.

The ganged pitch assembly 600 may be configured to: the link 610 is used for driving the pitch rod 621 to rotate, the pitch disc 622 is fixedly connected with the pitch rod 621, the pitch disc 622 is rotatably disposed on the pitch rod 621, when the rotating electrical machine 200 rotates relative to the base 100, the link 610 drives the pitch rod 621 to drive the pitch disc 622 to rotate along with the rotation of the rotating electrical machine 200, and when the pitch disc 622 rotates, the driven block 510 is pushed to rotate around the axis of the blade 500, so that the pitch of the blade 500 is finally changed.

Of course, the linkage pitch assembly 600 may also be configured as: the link 610 is used for driving the pitch rod 621 to move linearly, the pitch disc 622 and the pitch rod 621 are fixedly connected at an axial position of the pitch rod 621, when the rotating electrical machine 200 rotates relative to the base 100, the link 610 pushes the pitch rod 621 to move linearly along with the rotation of the rotating electrical machine 200 so that the pitch rod 621 drives the pitch disc 622 to move linearly, and when the pitch disc 622 moves linearly, the driven block 510 is pushed to rotate around the axis of the blade 500, so that the change of the pitch of the blade 500 is finally realized.

The embodiments of the linkage pitch-changing assembly 600 will be described in detail below, and will not be described herein.

By such an arrangement, the linkage variable pitch assembly 600 can be linked with the driving device 300, and when the rotating electrical machine 200 rotates relative to the base 100, the linkage variable pitch assembly 600 can drive the pitch of the blade 500 to change along with the position state of the propeller. The structures such as the pitch-variable driving motor 310 and the like are not required to be additionally arranged, and the pitch-variable control is simple.

Specifically, referring to fig. 2, 10 and 11, during the vertical takeoff phase of the aircraft, the aircraft speed is low, and at this time, the linked pitch changing assembly 600 drives the blades 500 to be at a small pitch, so that the driving efficiency of the propeller is high; at the stage of the aircraft flying flatly, the aircraft speed is great, and at this moment, the linkage variable pitch assembly 600 drives the paddle 500 to be in coarse pitch to make the drive efficiency of screw higher, in order to realize high aerodynamic efficiency, be favorable to sparingly flying the energy consumption.

Referring to fig. 5, 6 and 9, in some embodiments of the present application, pitch piece 620 includes a pitch lever 621 and a pitch disk 622; the rotating shaft 210 of the rotating motor 200 is hollow, and the variable pitch rod 621 penetrates through the hollow interior of the rotating shaft 210; the variable pitch disk 622 is disposed on the rotating shaft 210 and connected to the variable pitch rod 621; the pitch-variable disk 622 is provided with a slide 6221 which is matched with the passive block 510, and the slide 6221 is used for pushing the passive block 510 to rotate along the axis of the paddle 500.

It is understood that the rotating shaft 210 of the rotating electrical machine 200 is hollow, and is disposed such that the pitch lever 621 can be inserted into the hollow interior of the rotating shaft 210 of the rotating electrical machine 200. Meanwhile, the pitch lever 621 has one end connected to the link 610 and the other end connected to the pitch disk 622. The rotating shaft 210 of the rotating motor 200 is arranged such that when the rotating shaft 210 rotates, the rotating shaft 210 does not drive the pitch-variable rod 621 to rotate together; and, pitch bar 621 does not interfere with the rotation of hub 400 as blades 500 rotate. With such a configuration, when the driving device 300 drives the rotating motor 200 to rotate so as to switch the unmanned aerial vehicle between the vertical take-off and landing state and the flying state, the linkage pitch-changing assembly 600 can automatically change the pitch of the blade 500 along with the rotation of the rotating motor 200, so as to realize linkage transformation of the pitch.

Further, the pitch disk 622 is disposed on the rotating shaft 210 and connected to the pitch lever 621. For example, in the case where the link 610 is provided for driving the pitch lever 621 to move linearly, a bearing is connected between the pitch disc 622 and the pitch lever 621, and therefore, the axial position of the pitch disc 622 on the pitch lever 621 is fixed relative to the pitch lever 621. Under the condition that the linkage 610 is used for driving the pitch lever 621 to rotate, the pitch disc 622 is fixedly connected with the pitch lever 621, so that the pitch lever 621 can drive the pitch disc 622 to rotate when rotating.

Furthermore, a slide 6221 is disposed on the pitch-changing plate 622 and is matched with the passive block 510, the passive block 510 is inserted into the slide 6221, and the side wall of the slide 6221 abuts against the passive block 510. So set up, the connection structure between passive piece 510 and the displacement dish 622 is simple and connect stably, rotates the in-process at the screw high speed, and the fault rate of screw is low to, later stage assembly and maintenance are convenient.

Referring to fig. 7, in some embodiments of the present application, the passive block 510 includes a connection portion 512 and an abutment portion 511, the connection portion 512 is disposed perpendicular to the axis of the blade 500, and the abutment portion 511 is disposed on an end of the connection portion 512 away from the axis of the blade 500 in the direction of the axis of the blade 500; the abutting portion 511 is inserted in the slide groove 6221.

It will be appreciated that the abutment 511 is cylindrical, further, the end of the abutment 511 that is inserted into the slideway 6221 may be spherical, and the depth of the slideway 6221 is greater than the length of the abutment 511. When the variable-pitch disc 622 axially slides along the rotating shaft 210 or rotates on the rotating shaft 210, the side wall of the sliding track 6221 on the variable-pitch disc 622 abuts against the abutting portion 511 and drives the abutting portion 511 to rotate around the axis of the blade 500. Therefore, the abutting portion 511 is provided in this way, so that the free end of the abutting portion 511 and the bottom of the slide 6221 can be prevented from moving and interfering with each other, which is advantageous for improving the stability and reliability of the pitch changing operation.

Referring to fig. 4, in some embodiments of the present application, the link 610 includes an arc-shaped sliding slot 612 opened on the seat body 100, and a sliding member 611 having one end connected to the pitch-changing rod 621 and the other end inserted into the sliding slot 612; the distances between each point on the chute 612 and the rotation axis of the rotating motor 200 are different; the variable pitch disc 622 is slidably sleeved on the rotating shaft 210.

It should be understood that the sliding groove 612 has different curvatures, and the center of curvature of the sliding groove 612 and the rotation axis of the rotating electrical machine 200, specifically, the distance from each point on the sliding groove 612 to the rotation axis of the rotating electrical machine 200 is shortened one by one; when the rotary electric machine 200 rotates relative to the housing 100, the rotary electric machine 200 rotates around the curvature center of the sliding groove 612.

Furthermore, the included angle between the two ends of the sliding chute 612 is a right angle, and the distance from one end of the sliding chute 612 to the curvature center thereof is smaller than the distance from the other end of the sliding chute 612 to the curvature center thereof, that is, the difference between the distances from the two ends of the sliding chute 612 to the curvature center thereof is the moving distance of the variable pitch disk 622 in the axial direction of the rotating shaft 210 of the rotating electrical machine 200. It should be understood that, as distance that pitch disk 622 moves in the axial direction of shaft 210 is longer, the angle of rotation of passive block 510 on blade 500 with respect to the axis of blade 500 is larger, and therefore, the blade angle of blade 500 changes more, that is, the pitch of blade 500 changes more. For this reason, the two ends of the sliding groove 612 are referred to as a first end and a second end, and the distance from the first end to the rotation axis of the rotating electrical machine 200 is greater than the distance from the second end to the rotation axis of the rotating electrical machine 200.

The sliding member 611 may be a plug pin, one end of the plug pin is fixedly connected to the pitch-varying rod 621, and the other end of the plug pin is inserted into the sliding slot 612, so that when the rotating electrical machine 200 rotates relative to the seat body 100, the plug pin slides to different positions of the sliding slot 612, thereby driving the pitch-varying rod 621 to move axially along the rotating shaft 210, so that the sliding way 6221 of the pitch-varying disk 622 pushes the driven block 510 to rotate, thereby changing the pitch of the blade 500.

Referring to fig. 5, 6 and 8, in some embodiments of the present application, the slide 6221 is an annular slide disposed about the circumferential surface of the pitch disk 622; each passive block 510 cooperates with an annular slide.

It will be appreciated that, in particular, an annular slide is provided around the circumferential surface of the variable-pitch disc 622, in which the passive block 510 of each blade 500 is inserted; as in the above-described embodiment, the width of the annular slide is slightly larger than the diameter of the abutment portion 511 of the passive block 510, and therefore, the frictional force with which the abutment portion 511 slides in the annular slide can be reduced.

When the variable pitch disk 622 slides in the axial direction of the rotating shaft 210, the side wall of the annular slide way pushes the abutting portion 511 to slide in the annular slide way, so that the driven block 510 drives the blade 500 to rotate, thereby realizing the change of the blade angle, that is, the change of the pitch of the blade 500.

The slide rails 6221 are arranged in such a way, on one hand, during assembly or disassembly, as only the single slide rail 6221 is arranged, the debugging work of each blade 500 after assembly is simple and quick, the condition that the blade 500 is not assembled in place due to machining errors can be effectively reduced, and the later maintenance is convenient; moreover, the connection structure between the pitch disk 622 and the rotating shaft 210 or the hub 400 is simpler, thereby facilitating the processing.

It can be understood that the variable pitch disk 622 is slidably sleeved on the rotating shaft 210, and generally, the cross section of the rotating shaft 210 is generally circular in consideration of convenience in processing and adaptability, so that when the variable pitch disk 622 is slidably sleeved on the rotating shaft 210, the rotating shaft 210 inevitably rotates relative to the rotating shaft 210, which causes a certain error in assembly. For this reason, a guide is provided between pitch disk 622 and hub 400, so that pitch disk 622 can only slide axially along shaft 210 and cannot rotate, to improve its accuracy in controlling pitch variation and to reduce assembly difficulties. Specifically, the guiding means are a guiding pin 410 fixedly provided on hub 400 and a guiding groove 6222 provided on pitch disc 622 along an axial direction thereof, and guiding pin 410 is inserted into guiding groove 6222, thereby achieving circumferential positioning of pitch disc 622.

Referring to fig. 5 and 6, in some embodiments of the present application, the pitch bar 621 is rotatably connected to the hollow interior of the rotating shaft 210, a connecting assembly is connected between the pitch bar 621 and the pitch disc 622, the connecting assembly includes a connecting seat 623 and a connecting rod 624, the connecting seat 623 is rotatably disposed on the pitch bar 621, and two ends of the connecting rod 624 are respectively and fixedly connected to the connecting seat 623 and the pitch disc 622.

It can be understood that the distance-changing rod 621 is sleeved with a bearing, and it should be understood that the bearing is not tightly fitted with the hollow interior of the rotating shaft 210, so that the distance-changing rod 621 slides relative to the rotating shaft 210, and meanwhile, the shaking of the distance-changing rod 621 relative to the rotating shaft 210 is reduced, thereby being beneficial to improving the stability of the distance-changing operation. The connecting seat 623 is rotatably connected with the pitch rod 621, and similarly, the connecting seat 623 and the pitch rod 621 can be connected through a bearing, so that the connecting seat 623 and the pitch rod 621 can be kept relatively fixed in axial position. A connecting rod 624 is connected between the connecting seat 623 and the variable pitch disc 622. With such an arrangement, under the condition that the connection between the pitch disc 622 and the pitch lever 621 is kept stable, the volume and the mass of the pitch disc 622 can be reduced, so that the shaft load on the rotating shaft 210 of the rotating motor 200 is smaller, and the driving efficiency of the rotating motor 200 is improved; moreover, the pitch disc 622 can be completely sleeved on the rotating shaft 210, so that the stability of the pitch disc 622 sliding on the rotating shaft 210 is higher.

Referring to fig. 3, in some embodiments of the present disclosure, a position-limiting groove 211 is formed in the rotating shaft 210 along an axial direction thereof, and the connecting seat 623 is inserted into the position-limiting groove 211.

It can be understood that, set up spacing groove 211 along its axial on pivot 210, connecting seat 623 can wear to locate spacing groove 211 and connect change pitch lever 621 and connecting rod 624, so set up for the fairing can be assembled to the one end of keeping away from rotating electrical machines 200 on pivot 210, thereby reduces the wind resistance of screw when the aircraft is flat flying.

Referring to fig. 9, in some embodiments of the present application, the link member 610 is a rack gear 613 disposed on the housing 100 and having an arc shape, and a bevel gear 612 disposed at one end of the pitch-variable rod 621, the bevel gear 612 and the rack gear 613 being engaged with each other; the arc center of the bevel rack 613 and the rotation center of the rotating motor 200 are located on the same axis; the variable pitch disc 622 is rotatably sleeved on the rotating shaft 210.

It is understood that the pitch lever 621 is rotatably disposed in the hollow interior of the rotating shaft 210, the bevel gear 612 is fixedly disposed at the bottom of the pitch lever 621, and the bevel rack 613 and the bevel gear 612 are engaged with each other. When the rotating electrical machine 200 rotates relative to the seat 100, the bevel gear 612 and the bevel rack 613 are in meshed transmission, so that the bevel gear 612 can drive the variable-pitch rod 621 to rotate, and further the variable-pitch rod 621 drives the variable-pitch disk 622 to rotate, so that the slide 6221 on the variable-pitch disk 622 can push the driven block 510 to rotate.

Referring to fig. 9, in some embodiments of the present application, slide 6221 is a curved slide disposed on the circumferential surface of pitch disk 622, the two ends of the curved slide being at different heights; the number of curved ramps corresponds to the number of paddles 500.

It will be appreciated that each curved ramp is provided for each paddle 500. Further, the curvature of the curved ramp is not equal to the curvature of the arc of rotation of the blade 500 when viewed from the front in the direction of the axis of the blade 500, and the vertical distance between the top and bottom of the curved ramp is smaller than the radius of rotation of the blade 500. As pitch disk 622 rotates, the curved ramp on pitch disk 622 moves relative to the axis of rotation of blade 500, it being understood that during rotation of pitch disk 622, there is always a position on the curved ramp that is located on the arc of the rotation path of blade 500. For example, when the pitch disc 622 rotates until the abutment 511 is at the bottom of the curved slideway, the blade angle of the blade 500 is smaller, i.e. the pitch of the blade 500 is smaller; when the pitch disc 622 rotates until the abutment 511 is located in the middle of the curved slideway, the blade angle of the blade 500 is larger, i.e. the pitch of the blade 500 is larger.

Referring to fig. 3 and 5, in some embodiments of the present application, the driving device 300 includes a driving motor 310 and a two-bar linkage 320, and one end of the two-bar linkage 320 is connected to the driving motor 310 and the other end is connected to the rotating motor 200.

It can be understood that the extension arm 221 is disposed on the mounting seat of the rotating motor 200, and, from a side view, the extension arm 221 is disposed at an angle to the rotating shaft 210, and the two-link mechanism 320 includes a first link 321 and a second link 322, wherein the first link 321 is connected to the driving end of the driving motor 310, and two ends of the second link 322 are respectively connected to the extension arm 221 and the first link 321. Specifically, when the propeller is in the vertical state, the second link 322 is in the horizontal state, and when the propeller is in the horizontal state, the second link 322 is in the inclined state. The driving device 300 is arranged in such a way that the weight is light, the structure is simple and stable, the failure rate is low, and the propeller can be driven to change the position state and the propeller pitch stably and efficiently in time.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.

Claims (10)

1. A tilting type automatic pitch-variable propeller device is characterized by comprising:

a base body;

the rotating motor is rotatably arranged on the seat body;

the driving device is arranged on the seat body, is connected with the rotating motor and is used for driving the rotating motor to rotate relative to the seat body;

a hub fixedly provided to a rotating shaft of the rotating electric machine;

the blades are rotatably arranged on the hub, and passive blocks are arranged on the blades in a manner of deviating from the axes of the blades;

the linkage variable-pitch assembly comprises a linkage piece and a variable-pitch piece, and the variable-pitch piece is connected with the driven block; the linkage piece is connected with the variable-pitch piece and the seat body;

when the rotating motor rotates relative to the base body, the linkage piece can enable the variable-pitch piece to drive the driven block to rotate along the axis of the blade, so that the pitch of the blade is changed.

2. The tiltrotor automatic variable pitch propeller device according to claim 1, wherein: the pitch-changing piece comprises a pitch-changing rod and a pitch-changing disc; the rotating shaft of the rotating motor is arranged in a hollow mode, and the variable-pitch rod penetrates through the hollow interior of the rotating shaft; the variable-pitch disc is arranged on the rotating shaft and is connected with the variable-pitch rod; the variable-pitch disc is provided with a slide way matched with the driven block, and the slide way is used for pushing the driven block to rotate along the axis of the paddle.

3. The tiltrotor automatic variable pitch propeller device according to claim 2, wherein: the passive block comprises a connecting part and an abutting part, the connecting part is perpendicular to the axis of the blade, and the abutting part is arranged at one end, far away from the axis of the blade, of the connecting part along the axis direction of the blade; the abutting part is inserted in the slideway.

4. The tiltrotor automatic variable pitch propeller device according to claim 2, wherein: the linkage piece comprises an arc-shaped sliding groove arranged on the seat body and a sliding piece, one end of the sliding piece is connected with the variable pitch rod, and the other end of the sliding piece is inserted into the sliding groove; the distances between each point on the sliding chute and the rotating axis of the rotating motor are different; the variable-pitch disc is sleeved on the rotating shaft in a sliding manner.

5. The tiltrotor automatic variable pitch propeller device according to claim 4, wherein: the slideway is an annular slideway arranged around the circumferential surface of the variable-pitch disc; and each passive block is matched with the annular slide way.

6. The tiltrotor automatic variable pitch propeller device according to claim 4, wherein: the variable-pitch rod is connected with the hollow interior of the rotating shaft in a rotating mode, the variable-pitch rod is connected with the connecting assembly between the variable-pitch discs, the connecting assembly comprises a connecting seat and a connecting rod, the connecting seat is rotatably arranged on the variable-pitch rod, and two ends of the connecting rod are respectively fixedly connected with the connecting seat and the variable-pitch discs.

7. The tiltrotor automatic variable pitch propeller device according to claim 6, wherein: a limiting groove is formed in the rotating shaft along the axial direction of the rotating shaft, and the connecting seat penetrates through the limiting groove.

8. The tiltrotor automatic variable pitch propeller device according to claim 2, wherein: the linkage part is an arc-shaped bevel rack arranged on the seat body and a bevel gear arranged at one end of the variable-pitch rod, and the bevel gear is meshed with the bevel rack; the arc-shaped circle center of the conical rack and the rotating center of the rotating motor are positioned on the same axis; the variable-pitch disc is rotatably sleeved on the rotating shaft.

9. The tilter propeller device according to claim 8, wherein: the slideway is a curved slideway arranged on the circumferential surface of the variable pitch disc, and two ends of the curved slideway are positioned at different heights; the number of the curved slideways is consistent with that of the paddles.

10. The tiltrotor automatic variable pitch propeller device according to claim 1, wherein: the driving device comprises a driving motor and two connecting rod mechanisms, one end of each connecting rod mechanism is connected with the driving motor, and the other end of each connecting rod mechanism is connected with the rotating motor.

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