CN107310715B - Variable-pitch propeller and flying robot - Google Patents

Abstract

The invention discloses a variable-pitch propeller and a flying robot, which belong to the technical field of aircrafts, wherein the propeller comprises a propeller seat, a paddle and a sliding block, and the propeller seat is provided with a sliding groove and an auxiliary groove communicated with the sliding groove; the paddle is rotationally connected with the side wall of the paddle seat; the sliding block is in sliding connection with the sliding groove, a guide column accommodated in the auxiliary groove is arranged on the side face of the sliding block, one end, far away from the sliding block, of the guide column is in sliding connection with the paddle, and the guide column is used for converting movement of the sliding block into rotation of the paddle relative to the paddle seat. The rotation of paddle is conveniently adjusted through the removal of slider, and then changes paddle pitch size to change unmanned aerial vehicle power system, increase and decrease unmanned aerial vehicle product promotes the ratio, and then change unmanned aerial vehicle's response speed in the flight, reach the purpose of adjustment unmanned aerial vehicle product mobility, satisfy the demand of different service environment.

Description

A variable-pitch propeller and flying robot

technical field

The invention relates to the technical field of aircraft, in particular to a variable-pitch propeller and a flying robot using the variable-pitch propeller.

Background technique

With the development of aircraft technology, aircraft has been widely used in aerial survey, safety monitoring and other fields. The propeller is an important part of an aircraft. The propeller refers to a device that converts the rotational power of the engine into propulsion by rotating the blades in the air or water. The pitch is an important parameter of the propeller. The definition of the pitch is: assuming that the air is absolutely still, then the propeller rotates once, and the distance the aircraft advances is a pitch. Therefore, under the premise of a certain engine speed, the larger the pitch, the faster the aircraft. Obviously, the larger the angle of attack of the blade, the larger the pitch, and the relationship between the angle of attack of the blade and the pitch is proportional, so some propeller planes or helicopters say that changing the pitch actually changes the angle of attack of the blade, and the angle of attack of the blade relative to its other The angle of attack of the blade can be changed by turning the mounting seat where it is located at a certain angle. Most multi-rotor drones have fixed-pitch propellers, and after the product is finalized, its propulsion ratio is also fixed. If the user needs to adjust the pitch of the propeller according to different use environments, and then adjust the mobility of the product, it is difficult to achieve it with existing products.

Contents of the invention

The object of the present invention is to provide a variable-pitch propeller to solve the technical problem in the prior art that the propeller is a fixed-pitch blade and its adaptable range is narrow.

Another object of the present invention is to provide a flying robot to solve the technical problem in the prior art that the propeller is a fixed-pitch blade and the adaptable range is narrow.

As above design, the technical solution adopted in the present invention is:

A variable pitch propeller comprising:

A paddle seat with a chute and an auxiliary chute communicating with the chute;

a paddle, which is rotatably connected to the side wall of the paddle seat;

A slider, which is slidably connected with the chute, and a guide column accommodated in the auxiliary groove is provided on the side of the slider, and the end of the guide column away from the slider slides with the paddle connected to convert the movement of the slider into the rotation of the paddle relative to the paddle seat.

Wherein, the paddle is provided with a connection hole, and the paddle seat is provided with a threaded counterbore at the corresponding position of the connection hole, and the adjusting screw passes through the connection hole to connect with the threaded counterbore, and the connection The hole is flexibly connected with the adjusting screw.

Wherein, the adjusting screw includes a threaded part, a first boss part and a second boss part connected in sequence, the threaded part is connected with the threaded counterbore, and the first boss part is movable with the connecting hole connected, the second boss portion is located on the side of the paddle away from the paddle seat, and is used to limit the paddle.

Wherein, there are two connecting holes, one of which is a circular hole, and the other is an arc-shaped hole, the arc-shaped hole is concentric with the circular hole, and the paddle can be The center of the hole is the rotating shaft which rotates within the range defined by the arc-shaped hole.

Wherein, a waist-shaped sinker is provided on the paddle corresponding to the position of the guide post, and the end of the guide post away from the slider is slidably connected with the waist-shaped sinker to drive the paddle to rotate And limit the paddle.

Among them, also include:

An adjusting bolt is threadedly connected with the slider, and the slider is driven to slide linearly along the chute by rotating the adjusting bolt;

A pressure plate is fixedly connected to the paddle seat and rotatably connected to an end of the adjusting bolt away from the slider, and is used for limiting the adjusting bolt.

Wherein, the adjusting bolt includes a screw rod, a limiting portion connected to the screw rod, and a circular boss arranged on a side of the limiting portion away from the screw rod, the screw rod is threadedly connected with the slider, The circular boss passes through the limiting through hole on the pressing plate and is rotatably connected with the pressing plate.

Wherein, on the side of the position-limiting part close to the pressure plate, several position-limiting protrusions are evenly spaced along the circumferential direction, and the side of the position-limiting part close to the position-limiting part is at the corresponding position of the position-limiting protrusions. Set up limited grooves.

Wherein, a positioning groove for accommodating the limiting portion is provided on one end of the sliding groove on the oar seat, and the limiting portion is rotatably connected with the positioning groove.

A flying robot, comprising the variable-pitch propeller described in any one of the above.

Beneficial effects of the present invention:

The propeller with variable pitch proposed by the present invention comprises a paddle seat, paddle blades and a slider, the paddle seat is provided with a chute and an auxiliary groove communicated with the chute; the blade is rotatably connected with the side wall of the paddle seat; The chute is slidably connected, and the side of the slider is provided with a guide column accommodated in the auxiliary groove, and the end of the guide column away from the slider is slidably connected with the paddle, so as to convert the movement of the slider into relative to the paddle. Rotation of the propeller. Through the movement of the slider, it is convenient to adjust the rotation of the propeller relative to the propeller seat, and then change the pitch of the propeller, thereby changing the power system of the UAV, increasing or decreasing the propulsion ratio of the UAV product, and then changing the UAV during flight. Response speed achieves the purpose of adjusting the mobility of UAV products to meet the needs of different use environments.

The flying robot proposed by the present invention adopts the above-mentioned variable-pitch propeller, so it can change the pitch of the blade, thereby changing the power system of the UAV, increasing or decreasing the propulsion ratio of the UAV product, and then changing the speed of the UAV during the flight. The response speed can achieve the purpose of adjusting the mobility of UAV products and meet the needs of different use environments.

Description of drawings

Fig. 1 is the exploded structure schematic diagram of the propeller of variable pitch provided by the present invention;

Fig. 2 is a schematic structural view of the paddle seat in Fig. 1;

Fig. 3 is a structural schematic diagram of the adjusting screw in Fig. 1;

Fig. 4 is a schematic structural view of the adjusting bolt in Fig. 1;

Fig. 5 is a schematic structural view of the pressing plate in Fig. 1;

Fig. 6 is the front view of the propeller of variable pitch provided by the present invention;

Figure 7 is a top view of Figure 6;

Fig. 8 is the A-A direction sectional view of Fig. 6;

Fig. 9 is a side view of Fig. 6;

Fig. 10 is a B-B direction sectional view of Fig. 6;

Fig. 11 is a C-C cross-sectional view of Fig. 6 corresponding to Fig. 10;

Fig. 12 is a B-B cross-sectional view of another state of Fig. 6;

Fig. 13 is a sectional view taken along line C-C of Fig. 6 corresponding to Fig. 12 .

In the picture:

1. Propeller seat; 2. Propeller blade; 3. Slider; 4. Adjusting screw; 5. Adjusting bolt; 6. Pressing plate;

11. Chute; 12. Auxiliary groove; 13. Thread counterbore; 14. Positioning groove;

21. Circular hole; 22. Arc-shaped hole; 23. Waist sink;

31. Guide column;

41. Threaded part; 42. First boss part; 43. Second boss part;

51, screw rod; 52, limit part; 53, circular boss; 521, limit protrusion;

61, limiting through hole; 62, limiting groove.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all of them.

Referring to FIGS. 1 to 13 , a variable-pitch propeller includes a propeller seat 1 , a propeller blade 2 and a slider 3 . A chute 11 and an auxiliary groove 12 communicating with the chute 11 are provided on the paddle seat 1; the paddle 2 is rotationally connected with the side wall of the paddle seat 1; the slider 3 is slidingly connected with the chute 11, and the side of the slider 3 is provided with There is a guide column 31 accommodated in the auxiliary groove 12 , and the end of the guide column 31 away from the slider 3 is slidingly connected with the paddle 2 for converting the movement of the slider 3 into the rotation of the paddle 2 relative to the paddle seat 1 .

Through the movement of the slider 3, it is convenient to adjust the rotation of the blade 2 relative to the paddle seat, and then change the pitch of the blade 2, thereby changing the power system of the UAV, increasing or decreasing the driving ratio of the UAV product, and then changing the flight of the UAV. The response speed in the process achieves the purpose of adjusting the mobility of UAV products and meets the needs of different use environments.

In this embodiment, there are two paddles 2, which are respectively located on opposite sides of the paddle seat 1, therefore, there are also two guide posts 31 on the slider 3, which are respectively located on opposite sides of the slider 3. Of course, the number of paddles 2 can be set according to actual needs, and there is no limitation here.

The paddle 2 is provided with a connection hole, and the paddle seat 1 is provided with a threaded counterbore 13 at the corresponding position of the connection hole. In this embodiment, there are two connecting holes, one of which is a circular hole 21, and the other is an arc-shaped hole 22. The arc-shaped hole 22 is concentric with the circular hole 21, and the paddle 2 can The center of 21 is that the rotating shaft rotates in the range limited by the arc-shaped hole 22 .

The adjusting screw 4 includes a threaded part 41, a first boss part 42 and a second boss part 43 connected in sequence, the threaded part 41 is connected with the threaded counterbore 13, the first boss part 42 is movably connected with the connecting hole, and the second boss part 42 is connected with the connecting hole. The platform 43 is located on the side of the paddle 2 away from the paddle seat 1 , and is used for limiting the paddle 2 . In this embodiment, the diameter of the first boss portion 42 is larger than the diameter of the threaded portion 41 , and the diameter of the second boss portion 43 is larger than the diameter of the first boss portion 42 . Certainly, the second boss portion 43 may not be cylindrical, as long as it is ensured that the paddle 2 will not come out from the first boss portion 42 .

A waist-shaped sinking groove 23 is provided on the position corresponding to the guide post 31 on the paddle 2, and the end of the guide post 31 far away from the slider 3 is slidably connected with the waist-shaped sinking groove 23, which is used to drive the paddle 2 to rotate and limit the paddle 2 . Of course, the sinker can also be not waist-shaped, but other shapes capable of realizing the function of guiding and limiting, which is not limited here. Because the guide column 31 slides along the sinker groove to limit the position of the paddle 2, the sinker groove cannot be an arc-shaped hole with the same center as the circular hole 21, otherwise the limit function cannot be realized.

It also includes an adjusting bolt 5 and a pressure plate 6, the adjusting bolt 5 is threadedly connected with the slider 3, and the adjusting bolt 5 is rotated to drive the slider 3 to slide linearly along the chute 11; One end of the block 3 is rotatably connected to limit the adjustment bolt 5 .

The adjusting bolt 5 includes a screw rod 51, a limiting portion 52 connected to the screw rod 51 and a circular boss 53 arranged on the side of the limiting portion 52 away from the screw rod 51, the screw rod 51 is threadedly connected with the slide block 3, and the circular boss 53 Pass through the limiting through hole 61 on the pressing plate 6 and be connected with the pressing plate 6 in rotation. On the side of the limiting portion 52 close to the pressure plate 6, there are several limiting protrusions 521 evenly distributed along the circumferential direction, and the side of the pressing plate 6 close to the limiting portion 52 is provided with a limiting groove 62 at the corresponding position of the limiting protrusions 521. . One end of the chute 11 on the paddle seat 1 is provided with a positioning groove 14 for accommodating a limiting portion 52 , and the limiting portion 52 is rotatably connected to the positioning groove 14 .

When assembling, screw the adjusting bolt 5 into and pass through the screw hole on the slider 3, then insert the slider 3 into the chute 11 on the paddle seat 1, and at the same time place the guide column 31 in the auxiliary groove 12, And insert the limit portion 52 of the adjusting bolt 5 into the positioning groove 14, press the adjusting bolt 5 with a pressure block, make the limit groove 62 engage with the limit protrusion 521, and fasten the pressure block to the paddle with screws seat 1, thereby restricting the degree of freedom of the adjustment bolt 5, so that the adjustment bolt 5 only retains the degree of freedom of rotation along its axial direction; insert the end of the guide post 31 away from the slider 3 into the waist-shaped sinking groove 23 on the blade 2 , use the adjusting screw 4 to connect the paddle 2 and the paddle seat 1, but the adjusting screw 4 will not lock the paddle 2, because the first boss part 42 is movably connected with the connection hole, so that the paddle 2 can be connected with the circular hole 21 The center is that the rotating shaft rotates within the range limited by the arc-shaped hole 22 .

When adjusting the pitch, rotate the adjusting bolt 5, the slide block 3 moves in the chute 11 along the axis of the adjusting bolt 5, and then drives the guide post 31 to move along the auxiliary groove 12, because one end of the guide post 31 and the waist shape of the paddle 2 sink The slot 23 is slidingly connected, so the guide column 31 squeezes the inner wall of the waist-shaped sinking groove 23 to guide the paddle 2, so that the paddle 2 can rotate with the center of the circular hole 21 as the rotating shaft. When the rotation of the adjusting bolt 5 is stopped, the guide column 31 no longer moves, and the guide column 31 is in close contact with the waist-shaped sinker 23, and the degree of freedom of the paddle 2 along the circular hole 21 as the axis rotation direction is locked, thereby realizing the limitation of the paddle 2, and finally realizing the change The pitch of blade 2.

During the process of rotating the adjusting bolt 5, because the limiting groove 62 on the pressure block is engaged with the limiting protrusion 521 on the adjusting bolt 5, there is a fixed angle between adjacent limiting grooves 62 to ensure adjustment. The bolt 5 can be positioned after going through N fixed angles during the rotation process, thereby controlling N strokes of the slider 3 moving axially along the adjusting bolt 5 .

Fig. 10 to Fig. 13 show the schematic diagrams when the paddle 2 is in two states respectively. The process of the paddle 2 rotating from the state of FIG. 11 to the state of FIG. 13 is: rotating the adjusting bolt 5 to make the slide block 3 move vertically downward, at the same time, the guide column 31 squeezes the side wall of the waist-shaped sinker 23, so that the paddle 2 Rotate clockwise with the center of the circular hole 21 as the axis; when the slider 3 stops moving downward, the degree of freedom of the paddle 2 along the center of the circular hole 21 as the axis is locked, realizing changing the paddle The pitch of leaf 2.

The embodiment of the present invention also provides a flying robot, including the above-mentioned variable-pitch propeller, because it can change the size of the pitch of the blade 2, thereby changing the unmanned aerial vehicle power system, increasing or decreasing the driving ratio of the unmanned aerial vehicle product, and then changing the unmanned The response speed of the drone during the flight can achieve the purpose of adjusting the maneuverability of drone products and meet the needs of different use environments.

The above embodiments only set forth the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. On the premise of not departing from the spirit and scope of the present invention, the present invention also has various changes and changes. These changes and changes are all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A variable-pitch propeller, characterized in that, comprising: A paddle seat (1), on which a chute (11) and an auxiliary chute (12) communicating with the chute (11) are opened; a paddle (2), which is rotatably connected to the side wall of the paddle seat (1); A slider (3), which is slidably connected with the chute (11), a guide column (31) accommodated in the auxiliary groove (12) is provided on the side of the slider (3), and the The end of the guide column (31) away from the slider (3) is slidably connected with the paddle (2), and is used to convert the movement of the slider (3) into the movement of the paddle (2) relative to the Describe the rotation of paddle seat (1); The paddle (2) is provided with a connecting hole, the paddle seat (1) is provided with a threaded counterbore (13) at the corresponding position of the connecting hole, and the adjusting screw (4) passes through the connecting hole and The threaded counterbore (13) is connected, and the connecting hole is movably connected with the adjusting screw (4); There are two connecting holes, one of which is a circular hole (21), and the other is an arc-shaped hole (22), and the arc-shaped hole (22) is concentric with the circular hole (21), The paddle (2) can rotate within the range defined by the arc-shaped hole (22) with the center of the circular hole (21) as the axis of rotation; A waist-shaped sinker (23) is provided on the paddle (2) corresponding to the position of the guide post (31), and the end of the guide post (31) away from the slider (3) is in contact with the waist-shaped sinker (23). The sinker (23) is slidingly connected to drive the paddle (2) to rotate and limit the paddle (2); The adjusting screw (4) includes a threaded part (41), a first boss part (42) and a second boss part (43) connected in sequence, and the threaded part (41) and the threaded counterbore (13 ) connection, the first boss portion (42) is flexibly connected to the connection hole, and the second boss portion (43) is located on the side of the paddle (2) away from the paddle seat (1) , used to limit the paddle (2). 2. The variable-pitch propeller according to claim 1, further comprising: An adjusting bolt (5), which is threadedly connected with the slider (3), drives the slider (3) to slide linearly along the chute (11) by rotating the adjusting bolt (5); The pressure plate (6), which is fixedly connected with the paddle seat (1) and rotated with the end of the adjusting bolt (5) away from the slider (3), is used to limit the position of the adjusting bolt (5) . 3. The variable-pitch propeller according to claim 2, characterized in that, the adjusting bolt (5) comprises a screw rod (51), a stopper (52) connected to the screw rod (51) and a Said limiting portion (52) is away from the circular boss (53) on the side of said screw (51), said screw (51) is threadedly connected with said slider (3), said circular boss (53) passes through the limiting through hole (61) on the pressing plate (6) and is rotatably connected with the pressing plate (6). 4. The variable-pitch propeller according to claim 3, characterized in that, on the side of the position-limiting part (52) close to the pressure plate (6), several position-limiting projections are evenly spaced along the circumferential direction (521), the side of the pressure plate (6) close to the limiting part (52) defines a limiting groove (62) at a position corresponding to the limiting protrusion (521). 5. The variable-pitch propeller according to claim 4, characterized in that, one end of the chute (11) on the propeller seat (1) is provided with a seat for accommodating the limiting portion (52). The positioning slot (14), the limiting part (52) is rotatably connected with the positioning slot (14). 6. A flying robot, characterized in that it comprises the variable-pitch propeller according to any one of claims 1-5.