A quick-detachable device for propeller blades and unmanned aerial vehicle

Abstract

The present application relates to a quick-release device for a blade and a drone, the quick-release device comprising a base assembly; a blade assembly comprising a blade body and a connecting seat; the blade body is connected to the connecting seat; a limit block is provided on the outer peripheral surface of the connecting seat; a pin shaft movable hole extending in the axial direction is provided in the blade assembly, a pin hole extending in the radial direction is provided on the connecting seat, and the pin hole is connected with the pin shaft movable hole; a locking cap comprising a threaded section and a stop groove; the locking cap is sleeved on the outer side of the connecting seat and is threadedly connected to the base assembly through the threaded section to press the limit block onto the base assembly; a stop assembly is inserted into the pin hole movably in the radial direction; a quick-release pin shaft is inserted into the pin shaft movable hole movably in the axial direction; and a locking section and an unlocking section with different outer diameters are provided on the quick-release pin shaft. The present invention has the advantages of quick disassembly and assembly of blades, simple operation, and strong connection stability between the blade assembly and the base assembly.

Description

Technical Field

[0001] The present application relates to the technical field of unmanned aerial vehicles, and in particular to a quick-release device for propeller blades and an unmanned aerial vehicle. Background Art

[0002] The propeller blades play an extremely important role in the entire drone system, but at the same time, they are also a relatively easy-to-damage part. Therefore, the drone propeller blades need to be regularly maintained and inspected to ensure the safety and service life of the drone. Traditional drones use bolts to connect the propeller blades to the motor on the body. When disassembling the propeller blades, professional tools are needed to disassemble and assemble a large number of bolts, which is very troublesome, time-consuming and labor-intensive.

[0003] At present, some quick-detachable blade structures have been proposed in the prior art, but these quick-detachable structures generally have the problem of poor connection stability. When the drone is flying, the rotation of the blades will inevitably produce vibrations. For the quick-detachable structures with poor connection stability, the vibrations caused by the blades can easily cause the blades to loosen from the body. Summary of the invention

[0004] Based on this, it is necessary to provide a quick-release device for blades and a UAV, and the specific technical solution is as follows.

[0005] A quick-release device for a blade, comprising:

[0006] Base assembly;

[0007] The blade assembly comprises a blade body and a connecting seat; the blade body is connected to the connecting seat; a limit block is provided on the outer circumferential surface of the connecting seat; a pin shaft movable hole extending in the axial direction is provided in the blade assembly, a pin hole extending in the radial direction is provided on the connecting seat, and the pin hole is communicated with the pin shaft movable hole;

[0008] The locking cap comprises a threaded section and a stop groove; the locking cap is sleeved on the outside of the connecting seat and is threadedly connected to the base assembly through the threaded section, so as to press the limit block onto the base assembly;

[0009] A stop assembly is inserted into the pin hole and moves in a radial direction;

[0010] The quick-release pin is inserted into the pin movable hole in an axially movable manner; the quick-release pin is provided with a locking section and an unlocking section with different outer diameters; when one end of the stop assembly abuts against the locking section, the other end is inserted into the stop groove; when one end of the stop assembly abuts against the unlocking section, the other end is separated from the stop groove.

[0011] Furthermore, the connecting seat includes a connecting seat body, a pressure plate and a first fixing member; the connecting seat body and the pressure plate are respectively located on both sides of the blade body, and the first fixing member connects the pressure plate and the connecting seat body so that the pressure plate and the connecting seat body clamp the blade body.

[0012] Furthermore, the stop assembly includes a stop block, a stop spring and a stop pin; a positioning hole is provided on the stop block; a limit screw is connected to the connecting seat body, and the limit screw is inserted into the positioning hole to limit the movement of the stop block in the radial direction; the stop pin movably passes through the stop block, and the stop spring is sleeved on the stop pin and abuts against the stop block, and the stop spring has elastic potential energy to move the stop pin toward the axis of the quick-release pin shaft.

[0013] Furthermore, a quick release spring is provided between the quick release pin shaft and the connecting seat; the locking section is close to the quick release spring, and the unlocking section is far away from the quick release spring; the quick release spring has elastic potential energy that causes the unlocking section to move away from the stop assembly.

[0014] Furthermore, one end of the quick-release pin is connected to a guide fixing piece; a limiting hole connected to the movable hole of the pin is provided at the bottom of the connecting seat; one end of the guide fixing piece passes through the limiting hole and is provided with a limiting end head, and the diameter of the limiting end head is larger than the aperture of the limiting hole.

[0015] Furthermore, the base assembly includes a base body and a driving member; a positioning column is provided on the driving member, and a positioning through hole is provided on the base body; the base body is connected to the driving member through a second fixing member, and the positioning column is inserted into the positioning through hole.

[0016] Furthermore, a positioning flange is provided at the bottom of the connecting seat, an avoidance groove is provided at the top of the base body, a limiting groove is provided on the inner wall of the avoidance groove, and the positioning flange and the limiting groove cooperate to limit the relative rotation of the connecting seat and the base assembly.

[0017] Furthermore, one end of the quick-release pin extends out of the pin movable hole, and a pressing portion is provided at the extended end.

[0018] Furthermore, the retaining groove extends in the axial direction, and a plurality of retaining grooves are evenly distributed around the axis of the locking cap.

[0019] A drone, comprising:

[0020] A quick-release device for a blade as described above;

[0021] The machine body is connected with the base assembly.

[0022] Beneficial effects: The quick-release device and drone of the blade provided by the present invention realize the connection between the blade assembly and the base assembly by threaded connection between the locking cap and the base assembly; by pressing the quick-release pin shaft, changing the relative position of the stop assembly and the locking section and the unlocking section, the quick-release device can be switched to a locked state and an unlocked state; in the locked state, the stop assembly is inserted into the stop groove to limit the rotation of the locking cap, resist the rotation of the locking cap caused by the vibration generated by the rotation of the blade, and improve the connection stability between the blade assembly and the base assembly in the locked state; in the unlocked state, the stop assembly is separated from the stop groove, and the locking cap is rotated to realize the disassembly and assembly of the blade assembly. The present invention can realize the quick disassembly and assembly of the blade, simple operation, and strong connection stability between the blade assembly and the base assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is an overall schematic diagram of the quick release device;

[0025] Figure 2 This is one of the exploded schematic diagrams of the quick release device;

[0026] Figure 3 This is the second exploded diagram of the quick release device;

[0027] Figure 4 for Figure 2 A magnified schematic diagram of the middle A area;

[0028] Figure 5 for Figure 3 A magnified schematic diagram of the middle B area;

[0029] Figure 6 It is a schematic diagram of the quick release pin shaft;

[0030] Figure 7 is a schematic diagram of a stop assembly;

[0031] Figure 8 It is a schematic diagram of the cooperation between the connecting seat and the locking cap;

[0032] Fig. 9 is a cross-sectional view of the quick release device in a locked state;

[0033] Fig.10 It is a cross-sectional view of the quick release device in the unlocked state.

[0034] Description of reference numerals: 1. base assembly; 2. blade assembly; 3. locking cap; 4. stop assembly; 5. quick-release pin; 6. elastic gasket;

[0035] 11. Base body; 12. Driving member; 13. Second fixing member;

[0036] 111, positioning through hole; 112, limiting groove;

[0037] 121. Positioning column;

[0038] 21. blade body; 22. connecting seat body; 23. pin shaft movable hole; 24. pressing plate; 25. first fixing member;

[0039] 221, limit block; 222, pin hole; 223, limit hole; 224, positioning flange;

[0040] 31. threaded section; 32. stop groove;

[0041] 41. stopper; 42. stop spring; 43. stop pin; 44. limit screw;

[0042] 411, positioning hole;

[0043] 431, baffle; 432, long hole;

[0044] 51. Locking section; 52. Unlocking section; 53. Quick-release spring; 54. Guide fixing piece; 55. Pressing portion; 56. Spring hole. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and 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 therefore should not be understood as a limitation on the present application.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0051] Example 1

[0052] Reference Figures 1 to 3 As shown, this embodiment provides a quick-release device for a blade, including a base assembly 1, a blade assembly 2, a locking cap 3, a stop assembly 4 and a quick-release pin 5.

[0053] Reference Figure 2 and Figure 4As shown, the blade assembly 2 includes a blade body 21 and a connecting seat. The blade body 21 is connected to the connecting seat; a limit block 221 is provided on the outer circumferential surface of the connecting seat. In the present embodiment, the limit block 221 protrudes outward from the connecting seat and forms a circular ring; in other embodiments, the limit block 221 may also be in other shapes, such as a tooth shape, an irregular polygonal shape, etc. The blade assembly 2 is provided with a pin shaft movable hole 23 extending in the axial direction. The axial direction and the axial direction described below refer to the direction in which the axis of the blade assembly 2 is located, and the radial direction described below refers to the radial direction of the blade assembly 2. The connecting seat is provided with a pin hole 222 extending in the radial direction, and the pin hole 222 extends from the outer circumferential surface of the connecting seat to communicate with the pin shaft movable hole 23.

[0054] Reference Figure 4 and Figure 5 As shown, the locking cap 3 includes a threaded section 31 and a stop groove 32, and the threaded section 31 and the stop groove 32 are respectively located at different positions in the axial direction of the locking cap 3, and the inner diameter of the position where the threaded section 31 is located is different from the inner diameter of the position where the stop groove 32 is located, thereby forming a stepped surface. An external thread is provided on the base assembly 1, and the locking cap 3 is sleeved on the outside of the connecting seat, and is threadedly connected to the base assembly 1 through the threaded section 31, so that the stepped surface is abutted against the limit block 221, thereby pressing the limit block 221 onto the base assembly 1, and realizing the connection between the base assembly 1 and the blade assembly 2. Therefore, the disassembly and assembly between the base assembly 1 and the blade assembly 2 can be realized by rotating the locking cap 3.

[0055] Reference Figure 2 and Figure 6 As shown, the quick-release pin 5 is inserted into the pin movable hole 23 in an axial direction. The quick-release pin 5 is provided with a locking section 51 and an unlocking section 52 with different outer diameters. By pressing the quick-release pin 5 to change its axial position, the position of the locking section 51 and the unlocking section 52 are switched. The stop assembly 4 is inserted into the pin hole 222 in a radial direction. Therefore, when the quick-release pin 5 is pressed to change the position of the locking section 51 and the unlocking section 52, the relative position of the stop assembly 4 and the locking section 51 and the unlocking section 52 is changed, thereby realizing the switching between the locked and unlocked states. When in the locked state, one end of the stop assembly 4 is against the locking section 51, and the other end is inserted into the stop groove 32; at this time, the stop assembly 4 limits the rotation of the locking cap 3, and even if the blade vibrates, the locking cap 3 cannot be rotated, so that the blade assembly 2 and the base assembly 1 are more securely connected. When in the unlocked state, when one end of the stop assembly 4 abuts against the unlocking section 52, the other end is out of the stop groove 32. At this time, the stop assembly 4 no longer restricts the rotation of the locking cap 3, and the locking cap 3 is conveniently disassembled to realize the disassembly of the blade assembly 2 and the base assembly 1.

[0056] The quick-release device of the propeller provided in this embodiment realizes the connection between the propeller assembly 2 and the base assembly 1 by threading the locking cap 3 and the base assembly 1; by pressing the quick-release pin 5, the relative positions of the stop assembly 4 and the locking section 51 and the unlocking section 52 are changed, so that the quick-release device can be switched between the locked state and the unlocked state; in the locked state, the stop assembly 4 is inserted into the stop groove 32 to limit the rotation of the locking cap 3, resist the rotation of the locking cap 3 caused by the vibration generated by the rotation of the propeller, and improve the connection stability between the propeller assembly 2 and the base assembly 1 in the locked state; in the unlocked state, the stop assembly 4 is separated from the stop groove 32, and the locking cap 3 is rotated to realize the disassembly and assembly of the propeller assembly 2. It has the advantages of quick disassembly and assembly of the propeller, simple operation, and strong connection stability between the propeller assembly 2 and the base assembly 1.

[0057] Specifically, refer to Figure 2 As shown, the connecting seat includes a connecting seat body 22, a pressure plate 24 and a first fixing member 25. The connecting seat body 22 and the pressure plate 24 are respectively located on both sides of the blade body 21, and the first fixing member 25 connects the pressure plate 24 and the connecting seat body 22, so that the pressure plate 24 and the connecting seat body 22 clamp the blade body 21, and the first fixing member 25 can be a bolt. In the quick disassembly of the blade, the blade body 21, the connecting seat and the locking cap 3 are quickly disassembled from the base assembly 1 as a whole. It should be noted that the limit block 221, the pin shaft movable hole 23, the pin hole 222, etc. are all arranged on the connecting seat body 22, and the pin shaft movable hole 23 passes through the pressure plate 24, the blade body 21 and the connecting seat body 22 respectively, so that the quick-release pin shaft 5 extends out of the pressure plate 24.

[0058] Specifically, refer to Figure 7 As shown, the stop assembly 4 includes a stop block 41, a stop spring 42 and a stop pin 43. The stop block 41 is provided with a positioning hole 411, and the positioning hole 411 extends in the axial direction. Figure 5As shown, a limit screw 44 is connected to the connection seat body 22. The limit screw 44 also extends in the axial direction and extends from the top of the connection seat body 22 into the positioning hole 411. The diameter of the positioning hole 411 is the same as the diameter of the limit screw 44. The radial position of the stop block 41 is limited by the limit screw 44. The stop pin 43 movably passes through the stop block 41, one end of which extends toward the quick release pin shaft 5, and the other end extends toward the stop groove 32. A baffle 431 is also provided on the stop pin 43, and the stop spring 42 is sleeved on the stop pin 43, and one end of the stop spring 42 abuts against the stop block 41, and the other end abuts against the baffle 431. The stop spring 42 has elastic potential energy to move the stop pin 43 toward the axis of the quick release pin shaft 5, that is, the stop spring 42 is always in a compressed state. When the quick-release pin shaft 5 is pressed to align the stop pin 43 with the unlocking section 52 , the stop spring 42 drives the stop pin 43 to move so that it is automatically unlocked.

[0059] It should be noted that, continue to refer to Figure 7 As shown, the stop pin 43 is provided with an elongated hole 432 corresponding to the limit screw 44 , so that the length of the elongated hole 432 is greater than or equal to the stroke of the stop pin 43 .

[0060] Specifically, refer to Figure 4 As shown, it also includes a quick release spring 53 and a guide fixing member 54. Figure 6 As shown, a spring hole 56 is provided at the bottom of the quick release pin shaft 5, and the guide fixing member 54 is inserted into the spring hole 56 and connected to the quick release pin shaft 5. Figure 5 As shown, a limiting hole 223 connected to the pin movable hole 23 is also provided at the bottom of the connecting seat body 22. The aperture of the limiting hole 223 is smaller than the aperture of the pin movable hole 23, so that the quick release spring 53 is sleeved on the guide fixing member 54 and one end is against the bottom wall of the pin movable hole 23, and the other end is against the bottom wall of the spring hole 56. The quick release spring 53 has elastic potential energy to drive the quick release pin 5 to move out of the pin movable hole 23 along the axial direction, that is, the quick release spring 53 is always in a compressed state. The locking section 51 is close to the quick release spring 53, and the unlocking section 52 is away from the quick release spring 53. Therefore, in the locked state, the quick release spring 53 can drive the unlocking section 52 to move in the direction away from the stop assembly 4, thereby avoiding mis-locking. One end of the guide fixing member 54 passes through the limiting hole 223 and is provided with a limiting end head, and the diameter of the limiting end head is larger than the aperture of the limiting hole 223. The limiting end head is used to limit the axial position of the quick-release pin shaft 5 to prevent the quick-release pin shaft 5 from being separated from the connecting seat body 22 , and to keep the stop pin 43 against the locking section 51 in the locked state.

[0061] It should be noted that the unlocking section 52 is a pin groove on the quick release pin 5. In the radial direction, the depth of the pin groove is greater than the depth of the stop groove 32, so that after the stop assembly 4 is inserted into the pin groove, its tail end can completely disengage from the stop groove 32 and no longer restrict the rotation of the locking cap 3.

[0062] Specifically, refer to Figure 2 As shown, the base assembly 1 includes a base body 11 and a driving member 12. The driving member 12 is provided with a positioning column 121, and the base body 11 is provided with a positioning through hole 111. The base body 11 is connected to the driving member 12 through a second fixing member 13. The second fixing member 13 can be a bolt, and the positioning column 121 is inserted into the positioning through hole 111 to achieve coaxial positioning.

[0063] It should be noted that the external thread is provided on the base body 11 .

[0064] Specifically, refer to Figure 5 As shown, the bottom of the connection seat body 22 is provided with a positioning flange 224, and the positioning flange 224 is arc-shaped. Figure 2 As shown, the top of the base body 11 is provided with an avoidance groove, the inner wall of the avoidance groove is provided with a limiting groove 112, and the positioning flange 224 cooperates with the limiting groove 112 to limit the relative rotation of the connecting seat and the base assembly 1, thereby ensuring the stability of the connecting seat.

[0065] It should be noted that, refer to Figure 2 As shown, an elastic gasket 6 is provided between the connecting seat body 22 and the base body 11 to avoid looseness due to assembly gap.

[0066] Specifically, refer to Figure 1 and Figure 6 As shown, one end of the quick-release pin 5 extends out of the pin movable hole 23, and a pressing portion 55 is provided at the extended end, so that the user can press the quick-release pin 5 to switch the locked state to the unlocked state.

[0067] Specifically, refer to Figure 4 As shown, the retaining groove 32 extends in the axial direction, and a plurality of retaining grooves 32 are evenly distributed around the axis of the locking cap 3 .

[0068] Specifically, in this embodiment, the number of the stopper components 4 is two groups, and they are symmetrically arranged along the axis of the connection seat body 22. In other embodiments, the number of the stopper components 4 can also be multiple groups, and they are evenly distributed around the axis of the connection seat body 22.

[0069] Disassembly process:

[0070] Reference Fig. 9As shown, when the quick release device is in the locked state, the stop pin 43 abuts against the locking section 51. At this time, the stop pin 43 is inserted into the stop groove 32 to limit the rotation of the locking nut, thereby ensuring the stability of the connection between the elastic gasket 6 base assembly 1 and the blade assembly 2. Fig.10 As shown, it is only necessary to press the quick-release pin shaft 5 downward to align the stop pin 43 with the unlocking section 52. Under the action of the stop spring 42, the stop pin 43 is driven to move and inserted into the unlocking section 52. Since the stop pin 43 moves, the tail end of the stop pin 43 is disengaged from the stop groove 32, so the stop pin 43 no longer restricts the rotation of the locking cap 3. The blade assembly 2 and the base assembly 1 can be quickly disassembled by rotating the locking cap 3.

[0071] Example 2

[0072] This embodiment provides a drone, including a blade quick-release device as described in Embodiment 1, and a body. The body is connected to the driving member 12, and the blade assembly 2 can be disassembled to separate the blade assembly 2 from the body, thereby facilitating maintenance, inspection, replacement, etc. of the blade assembly 2.

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A quick-release device for a blade, characterized in that: include: Base assembly; The blade assembly comprises a blade body and a connecting seat; the blade body is connected to the connecting seat; a limit block is provided on the outer circumferential surface of the connecting seat; a pin shaft movable hole extending in the axial direction is provided in the blade assembly, a pin hole extending in the radial direction is provided on the connecting seat, and the pin hole is communicated with the pin shaft movable hole; The locking cap comprises a threaded section and a stop groove, wherein the stop groove extends in the axial direction; the locking cap is sleeved on the outer side of the connecting seat and is threadedly connected with the base assembly through the threaded section, thereby pressing the limit block onto the base assembly; A stop assembly is inserted into the pin hole and moves in a radial direction; The quick-release pin is inserted into the pin movable hole in an axial direction; the quick-release pin is provided with a locking section and an unlocking section with different outer diameters; when one end of the stop assembly abuts against the locking section, the other end is inserted into the stop groove; when one end of the stop assembly abuts against the unlocking section, the other end is separated from the stop groove; The connecting seat comprises a connecting seat body, a pressing plate and a first fixing member; the connecting seat body and the pressing plate are respectively located on both sides of the blade body, and the first fixing member connects the pressing plate and the connecting seat body so that the pressing plate and the connecting seat body clamp the blade body; The stop assembly comprises a stop block, a stop spring and a stop pin; a positioning hole is provided on the stop block; a limit screw is connected to the connecting seat body, and the limit screw is inserted into the positioning hole to limit the movement of the stop block in the radial direction; the stop pin movably passes through the stop block, and the stop spring is sleeved on the stop pin and abuts against the stop block, and the stop spring has elastic potential energy to move the stop pin toward the axis of the quick-release pin shaft; The stop pin is provided with a long hole corresponding to the limit screw, so that the length of the long hole is greater than or equal to the stroke of the stop pin.

2. A quick-release device for a blade according to claim 1, characterized in that: A quick release spring is arranged between the quick release pin shaft and the connecting seat; the locking section is close to the quick release spring, and the unlocking section is far away from the quick release spring; the quick release spring has elastic potential energy that enables the unlocking section to move away from the stop assembly.

3. A quick-release device for a blade according to claim 2, characterized in that: One end of the quick-release pin is connected to a guide fixing piece; a limiting hole connected to the movable hole of the pin is provided at the bottom of the connecting seat; one end of the guide fixing piece passes through the limiting hole and is provided with a limiting end head, and the diameter of the limiting end head is larger than the aperture of the limiting hole.

4. The quick-release device for a propeller blade according to claim 1, characterized in that: The base assembly includes a base body and a driving member; a positioning column is provided on the driving member, and a positioning through hole is provided on the base body; the base body is connected to the driving member through a second fixing member, and the positioning column is inserted into the positioning through hole.

5. The quick-release device for a propeller blade according to claim 4, characterized in that: A positioning flange is provided at the bottom of the connecting seat, an avoidance groove is provided at the top of the base body, a limiting groove is provided on the inner wall of the avoidance groove, and the positioning flange cooperates with the limiting groove to limit the relative rotation of the connecting seat and the base assembly.

6. The quick-release device for a propeller blade according to claim 1, characterized in that: One end of the quick-release pin extends out of the pin movable hole, and a pressing portion is provided at the extended end.

7. The quick-release device for a propeller blade according to claim 1, characterized in that: A plurality of retaining grooves are evenly distributed around the axis of the locking cap.

8. A drone, characterized in that: include: A quick-release device for a propeller blade as claimed in any one of claims 1 to 7; The machine body is connected with the base assembly.

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