CN217969897U

CN217969897U - Integrated variable pitch mechanism of electric propeller

Info

Publication number: CN217969897U
Application number: CN202221865833.0U
Authority: CN
Inventors: 白志亮; 张炜
Original assignee: Shaanxi Huayu Xianxiang Intelligent Technology Co ltd
Current assignee: Changsha Huayu Xianxiang Aviation Technology Co.,Ltd.
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-12-06
Anticipated expiration: 2032-07-19

Abstract

An integrated variable-pitch mechanism of an electric propeller comprises a cabin body, a blade pitch adjusting rotating shaft, a propeller driving mechanism, a variable-pitch adjusting mechanism, a propeller cover, an eccentric shaft and a propeller; the propeller driving mechanism is arranged in the cabin body, the propeller cover is arranged at one end of the cabin body, the output end of the propeller driving mechanism is connected with the propeller cover, a circle of connecting holes are circumferentially arranged on the propeller cover, a blade pitch adjusting rotating shaft is arranged in each connecting hole, and a propeller is fixedly connected to each blade pitch adjusting rotating shaft; an eccentric shaft is arranged on the end face of the blade pitch adjusting rotating shaft on the inner side of the propeller cover, one end of the variable pitch adjusting mechanism penetrates through the propeller driving mechanism to be connected to the eccentric shaft, and the blade pitch adjusting rotating shaft is driven to rotate by the up-and-down movement of the variable pitch adjusting mechanism. The utility model discloses a brushless motor realizes that electric screw realizes the pitch control in rotatory time with step motor's combination, and the structure is succinct high-efficient.

Description

Integrated variable pitch mechanism of electric propeller

Technical Field

The utility model belongs to the technical field of electric screw integration displacement, in particular to electric screw integration displacement mechanism.

Background

The motorization of airplanes is a necessary trend in the development of aviation, and electric airplanes use electric propulsion systems instead of internal combustion engine power, thereby obtaining a plurality of advantages and unique qualities. The most outstanding advantages are energy saving, environmental protection, high efficiency, low energy consumption, near zero emission, low noise and vibration level, good riding comfort and being a real environment-friendly airplane. In addition, the device has the characteristics of safety, reliability (no explosion and fuel leakage), simple structure, convenience in operation and use, good maintainability, low cost, good economy and the like. There are also many advantages in design: the overall layout is flexible, and the optimal layout and the unconventional/innovative layout can be adopted; the airplane with extraordinary performance can be designed to meet the requirements of special purposes, and the like. The electric aircraft mostly adopts propellers as propulsion power, and in order to meet the performance of the aircraft in each speed interval, a propeller pitch adjusting mechanism, also called a pitch-variable mechanism, of the propellers is of great importance.

In the prior art, the pitch adjustment needs to be carried out independently, the adjustment can not be carried out in the rotating process of the propeller, and the adjusting steps are complicated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electronic screw integration displacement mechanism to solve above-mentioned problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an integrated variable-pitch mechanism of an electric propeller comprises a cabin body, a blade pitch adjusting rotating shaft, a propeller driving mechanism, a variable-pitch adjusting mechanism, a propeller cover, an eccentric shaft and a propeller; the propeller driving mechanism is arranged in the cabin body, the propeller cover is arranged at one end of the cabin body, the output end of the propeller driving mechanism is connected with the propeller cover, a circle of connecting holes are circumferentially arranged on the propeller cover, a blade pitch adjusting rotating shaft is arranged in each connecting hole, and a propeller is fixedly connected to each blade pitch adjusting rotating shaft; an eccentric shaft is arranged on the end face of the blade pitch adjusting rotating shaft on the inner side of the propeller cover, one end of the variable pitch adjusting mechanism penetrates through the propeller driving mechanism to be connected to the eccentric shaft, and the variable pitch adjusting mechanism moves up and down to drive the blade pitch adjusting rotating shaft to rotate.

Further, the propeller driving mechanism is an outer rotor brushless motor, and an outer rotor of the outer rotor brushless motor is connected with the propeller cover through bolts.

Further, the outer rotor brushless motor is connected with a motor speed regulator.

Further, the variable pitch adjusting mechanism comprises a screw rod, a stepping motor, a connecting disc and a sliding block; the lead screw is coaxially arranged in the center of the outer rotor brushless motor, the bottom end of the lead screw is connected with the stepping motor, the other end of the lead screw is connected with the sliding block and the connecting disc, the sliding block is in threaded fit connection with the lead screw, and the connecting disc is in sliding fit connection with the sliding block through a bearing.

Furthermore, the connection pad is fretwork disc structure, and the edge of connection pad and eccentric shaft junction are provided with the connecting hole, and the eccentric shaft setting is in the connecting hole.

Furthermore, the inner ring of the bearing between the connecting disc and the sliding block is connected with the sliding block, and the outer ring of the bearing is connected with the connecting disc.

Furthermore, a limiting pin is arranged on the sliding block, one end of the limiting pin is fixedly connected with a stator in the outer rotor brushless motor, and the other end of the limiting pin is connected to the sliding block.

Furthermore, a limiting pin is inserted from the upper end of the sliding block and extends to the stator along the screw rod, and the limiting pin is positioned on the inner side of the bearing inner ring.

Furthermore, a thrust bearing is arranged between the screw rod and an outer rotor of the outer rotor brushless motor.

Compared with the prior art, the utility model discloses there is following technological effect:

the utility model discloses a brushless motor and step motor's combination is provided with the spacer pin here, and the stator is connected to spacer pin one end, and one end link block when realizing that the lead screw rotates, the slider is motionless, and the locating pin is located the bearing inboard, does not influence the rotation of connection pad, when realizing that the lead screw rotates, drives the slider and reciprocates, drives the connection pad promptly and reciprocates, further realizes that electric screw realizes the pitch control in the rotation, and the structure is succinct high-efficient.

The utility model discloses a self-locking characteristic of lead screw for the pitch angle of screw can not change because of aerodynamic force.

Drawings

FIG. 1 external view of an engine nacelle

FIG. 2 sectional view of the engine nacelle 1

FIG. 3 sectional view of the engine nacelle 2

FIG. 4 blade shaft schematic

FIG. 5 Motor Cross-sectional view

FIG. 6 is a schematic view of a stopper pin

Wherein:

the device comprises a propeller cover 1, a propeller 3, a propeller pitch adjusting rotating shaft 2, an outer rotor brushless motor 7, a motor speed regulator 8, a lead screw 6, a sliding block 5, a connecting disc 4, a stepping motor 9, an eccentric shaft 10, a thrust bearing 11, a brushless motor stator 12, a brushless motor rotor 13 and a limit pin 14.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

As shown in fig. 1, which shows the external view of the nacelle of the engine, wherein 1 is the propeller cover, 3 is the propeller, 2 is the rotating shaft for adjusting the blade pitch, the pitch-adjusting mechanism of the propeller has the effect that the propeller can rotate around the rotating shaft for adjusting the blade pitch at a low speed to change the pitch angle of the propeller during operation. The direction of rotation is shown by the direction of the arrow in the figure.

Fig. 2 is a cross-sectional view of the engine nacelle after cutting the housing, wherein 7 is an outer rotor brushless motor, 8 is a motor speed regulator, 6 is a lead screw, 5 is a slider, 4 is a connection disc, and the connection disc and the slider are in sliding fit through a bearing.

As shown in fig. 3, the stepping motor 9 drives the lead screw passing through the brushless motor to push the slider 5 to move up and down, and simultaneously drives the connecting disc 4 to move up and down.

As shown in fig. 4, the connecting shaft of the blade pitch adjusting rotating shaft 2 and the connecting disc is an eccentric shaft 10, and the adjustment of the blade pitch angle can be realized through the vertical movement of the connecting disc 4 through the matching of the eccentric shaft and the connecting disc 4.

Further illustrated by the motor sectional view of fig. 5, where 12 is a brushless motor stator, 13 is a brushless motor rotor, when the propeller normally works, the propeller cover is connected with the brushless motor rotor through a bolt to drive the propeller to rotate, when the pitch of the propeller does not need to be adjusted, the screw rod 6 and the sliding block 5 do not move relative to the motor stator, the connecting disc and the sliding block are in sliding fit through a bearing, the connecting disc rotates along with the propeller, when the pitch of the propeller needs to be adjusted, the stepping motor 9 drives the screw rod 6 to rotate at a low speed, the sliding block is provided with a limit pin, one end of the limit pin is fixedly connected with the stator in the outer rotor brushless motor, and the other end of the limit pin is connected to the sliding block. The limiting pin is inserted from the upper end of the sliding block and extends to the stator along the screw rod, the limiting pin is positioned on the inner side of the bearing inner ring, the sliding block 5 is pushed to move up and down, and the connecting disc 4 rotates along with the propeller and moves up and down under the pushing of the sliding block 5, so that the propeller pitch adjustment of the propeller is realized. 11 are thrust bearings in order to provide smooth rotation between the screw 6 and the rotor, rather than direct friction.

Claims

1. An integrated pitch-variable mechanism of an electric propeller is characterized by comprising a cabin body, a blade pitch adjusting rotating shaft (2), a propeller driving mechanism, a pitch-variable adjusting mechanism, a propeller cover (1), an eccentric shaft (10) and a propeller (3); the propeller driving mechanism is arranged in the cabin body, the propeller cover (1) is arranged at one end of the cabin body, the output end of the propeller driving mechanism is connected with the propeller cover (1), a circle of connecting holes are circumferentially arranged on the propeller cover (1), a blade pitch adjusting rotating shaft (2) is arranged in each connecting hole, and a propeller (3) is fixedly connected to each blade pitch adjusting rotating shaft (2); an eccentric shaft (10) is arranged on the end face of the blade pitch adjusting rotating shaft (2) on the inner side of the propeller cover (1), one end of the variable pitch adjusting mechanism penetrates through the propeller driving mechanism to be connected to the eccentric shaft (10), and the blade pitch adjusting rotating shaft (2) is driven to rotate by the up-and-down movement of the variable pitch adjusting mechanism.

2. An electric propeller integrated pitch change mechanism according to claim 1, wherein the propeller driving mechanism is an outer rotor brushless motor (7), and an outer rotor of the outer rotor brushless motor (7) is connected with the propeller cover (1) through bolts.

3. An integrated variable pitch mechanism of an electric propeller according to claim 2, wherein the outer rotor brushless motor (7) is connected with a motor speed regulator (8).

4. The integrated variable pitch mechanism of the electric propeller as claimed in claim 2, wherein the variable pitch adjusting mechanism comprises a screw rod (6), a stepping motor (9), a connecting disc (4) and a sliding block (5); lead screw (6) coaxial setting is at outer rotor brushless motor (7) center, and step motor (9) are connected to the bottom of lead screw (6), other end slider (5) and connection pad (4), and slider (5) and lead screw (6) screw-thread fit are connected, connect through bearing sliding fit between connection pad (4) and slider (5).

5. The integrated variable pitch mechanism of the electric propeller as claimed in claim 4, wherein the connecting disc (4) is a hollow disc structure, a connecting hole is arranged at the joint of the edge of the connecting disc (4) and the eccentric shaft (10), and the eccentric shaft (10) is arranged in the connecting hole.

6. The integrated variable pitch mechanism of the electric propeller as claimed in claim 4, wherein the inner ring of the bearing between the connecting disc (4) and the sliding block (5) is connected with the sliding block (5), and the outer ring is connected with the connecting disc (4).

7. The integrated variable pitch mechanism of the electric propeller as claimed in claim 6, wherein the slide block (5) is provided with a limit pin (14), one end of the limit pin (14) is fixedly connected with a stator in the outer rotor brushless motor (7), and the other end is connected to the slide block (5).

8. An integral pitch-changing mechanism of an electric propeller as claimed in claim 7, wherein a limit pin (14) is inserted from the upper end of the slide block (5) and extends along the screw rod (6) to the stator, and the limit pin (14) is located inside the inner race of the bearing.

9. An integral pitch-changing mechanism of an electric propeller as claimed in claim 1, wherein a thrust bearing (11) is arranged between the screw rod (6) and the outer rotor of the outer rotor brushless motor (7).