Quick-release propeller clamp mechanism of unmanned aerial vehicle propeller

Abstract

According to the quick-release propeller clamp mechanism for the propeller of the unmanned aerial vehicle, the unmanned aerial vehicle comprises the propeller and a propeller motor, a first mounting screw hole and a second mounting screw hole are formed in the propeller and the propeller motor correspondingly, and the propeller clamp mechanism comprises an elastic locking piece, a base, a rotary locking piece, a limiting connecting piece, a cover piece, a first reset spring and a second reset spring; a propeller motor and an unmanned aerial vehicle arm are preassembled and fixed, a propeller and a cover piece are preassembled and fixed, axial interlocking is completed when the cover piece is inserted into a shaft part and a rotary locking piece through axial limiting matching, capable of being unlocked, of the shaft part of the cover piece and the rotary locking piece, and the axial interlocking further ensures that a synchronous groove and a synchronous convex block are embedded and kept; and the base and the limiting connecting piece which coaxially rotate with the propeller motor can drive the cover piece and the propeller to synchronously rotate.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a quick-release propeller clamp mechanism for UAV propellers. Background Technology

[0002] The propeller of a drone is a vulnerable part during flight, and it can be damaged and needs to be replaced due to impacts. Moreover, depending on different flight conditions, there are situations where different models of propellers need to be replaced for drones based on factors such as the characteristics of the flight mission and environmental conditions.

[0003] The existing technology has the following problems: To ensure stable propeller operation, traditional propellers and motors are fixed with multiple fasteners such as screws. When it is necessary to disassemble the propeller, specific tools are required, and the operation takes a certain amount of time to complete the replacement, which is inefficient and carries the risk of tools being lost. It cannot meet the needs of rapidly preparing drones and quickly replacing propellers under the requirements of harsh environmental missions.

[0004] Furthermore, removing the propellers when storing a drone can optimize storage space and protect the propellers.

[0005] Therefore, it is necessary to change the connection structure design between the drone propeller and the motor to ensure stable interlocking and high-speed propeller operation, while proposing a simple and quick unlocking and locking interlocking structure design to improve the propeller assembly and disassembly efficiency. Utility Model Content

[0006] To address the shortcomings of the aforementioned technologies, this invention provides a quick-release propeller clamp mechanism for drone propellers.

[0007] The technical solution of this utility model is: a quick-release propeller clamping mechanism for a drone propeller, wherein the drone includes a propeller and a propeller motor, and the propeller and propeller motor are respectively provided with a first mounting screw hole and a second mounting screw hole, and the propeller clamping mechanism includes an elastic locking component, a base, a rotary locking component, a limiting connecting component, a cover component, a first return spring, and a second return spring.

[0008] The base is fixed to the second mounting screw hole of the propeller motor with screws and rotates synchronously on the same axis. The base is provided with several fourth mounting screw holes. The rotary lock is coaxially rotated with the base, including the rotation direction of the locking position and the rotation direction of the unlocking position. The rotary lock is provided with a shaft hole through the axis and several arc-shaped through slots are provided at equal intervals around the center. The limiting connector includes a ring part, which is located between the circumferential position of the rotary lock and the shaft. It slides with the axial end face of the rotary lock to restrict its axial movement. The inner diameter of the ring part is larger than the diameter of the shaft hole. The ring part is provided with a pin extending through each arc-shaped through slot, and each pin is fixed with a screw in each fourth mounting screw hole.

[0009] One end of the cover is fixed to the first mounting screw hole of the propeller with screws and is coaxial with the propeller. The other end of the cover is provided with an insertion shaft part that is inserted into the axial limiting groove, and a number of synchronous grooves are provided around the insertion shaft part. The annular part is provided with a number of synchronous protrusions that fit into the synchronous grooves in the corresponding positions and shapes.

[0010] The second return spring is disposed inside the rotary lock and drives the rotary lock to rotate continuously in the direction of the upper locking position. The elastic lock and the first return spring are disposed at the shaft hole. The first return spring drives the elastic lock to perform a separable axial interlock with the inserted shaft, so that the synchronous groove and the synchronous protrusion remain engaged.

[0011] The propeller motor drives the base and the limiting connector to rotate synchronously, and the synchronous protrusion drives the cover and the propeller to rotate synchronously. The cover and the rotating lock are detachably axially assembled.

[0012] A further feature of this invention is that the elastic locking component includes a central shaft portion, one end of which has a spring hole and a radially arranged lug portion on its outer circumferential surface.

[0013] The base includes a first end face adjacent to the second mounting screw hole and a second end face at the other end. The base is provided with a third mounting countersunk hole that penetrates the first end face and the second end face and is aligned with the position of the second mounting screw hole. An upper locking groove adapted to the cross-sectional shape of the elastic lock is provided at the center position of the second end face. The axial depth of the upper locking groove is adapted to the axial thickness of the lug. The lug of the elastic lock is inserted into the upper locking groove. The first reset spring is compressed between the spring hole and the bottom surface of the upper locking groove, driving the lug to extend out of the upper locking groove axially.

[0014] The rotary lock includes a third end face adjacent to the second end face and a fourth end face at the other end. An unlocking groove is provided at the center of the third end face. The shape of the unlocking groove is the same as that of the upper lock groove and its depth is less than the thickness of the lug. The radial angle of the unlocking groove is offset from that of the upper lock groove. A central hole is provided at the center of the unlocking groove, extending through to the fourth end face. The central shaft of the elastic lock extends into the central hole.

[0015] An axial limiting groove communicating with a central hole is provided at the center of the fourth end face. Several first radially extending protrusions are equally spaced around the center of the groove opening, and an insertion gap is provided between the several first radially extending protrusions. Several arc-shaped through grooves penetrating to the third end face are equally spaced around the center of the fourth end face. The diameter of the several arc-shaped through grooves is larger than the diameter of the axial limiting groove. The arc-shaped through groove includes a locking end and an unlocking end. The included angle between the locking end and the unlocking end is consistent with the radial angle value of the offset between the unlocking groove and the locking groove.

[0016] The limiting connector includes a circular ring portion, which includes a fifth end face adjacent to the fourth end face and a sixth end face at the other end. The fifth end face is provided with a plurality of insertion posts at equal intervals around the center. The plurality of insertion posts extend into each arc-shaped through groove. A second return spring is provided in each arc-shaped through groove. The second return spring is located between the insertion post and the unlocking end. The second return spring continuously drives the rotating lock to rotate toward the insertion post toward the locking end.

[0017] The sixth end face is provided with several synchronous protrusions along the axial direction;

[0018] The insertion post passes through the arc-shaped through groove and is adjacent to the second end face. The second end face and the insertion post are respectively provided with the fourth mounting screw hole and the fifth mounting screw hole. The insertion post is fixed to the second end face by screws.

[0019] The cover includes a seventh end face adjacent to the sixth end face and an eighth end face at the other end. The seventh end face is provided with an insertion shaft portion that is inserted into the axial limiting groove. The diameter of the insertion shaft portion is less than or equal to the outer diameter of the first radially extending protrusion, and a plurality of second radially extending protrusions are equally distributed radially on the outer circumferential surface. The outer diameter of the plurality of second radially extending protrusions is adapted to the diameter of the axial limiting groove and enters the axial limiting groove through the insertion gap.

[0020] The seventh end face is provided with several synchronous grooves, which are respectively fitted into each synchronous protrusion. The propeller motor drives the base and the limiting connector to rotate, and the fitting of the synchronous protrusion drives the cover and the propeller to rotate.

[0021] The eighth end face is provided with a sixth mounting screw hole that aligns with the first mounting screw hole of the propeller and is fixed with the propeller screw.

[0022] The insertion shaft of the cover extends axially into the axial limiting groove, presses down against the central shaft, drives the lug to leave the unlocking groove and enter the upper locking groove, the rotating lock loses the limiting of the lug, and the second return spring drives the first radially extending protrusion to rotate to the path of the second radially extending protrusion axially disengaging, and keeps blocking the insertion shaft from leaving the axial limiting groove.

[0023] A further feature of this invention is that the second radially extending protrusion of the insertion shaft includes an outer peripheral surface and an arc-shaped top surface. The diameter of the outer peripheral surface is adapted to the diameter of the axial limiting groove. The arc-shaped top surface faces the propeller side and includes an arc height point relatively close to the propeller and an arc bottom point relatively far from the propeller. The arc bottom point is aligned with the rotation direction of the locking position of the first radially extending protrusion, guiding the first radially extending protrusion to slide along the arc-shaped top surface past the second radially extending protrusion.

[0024] A further feature of this invention is that a guide shaft is provided at the center of the eighth end face, the sixth mounting screw hole is provided around the guide shaft, and a guide hole is provided on the propeller corresponding to the position and diameter of the guide post.

[0025] A further feature of this invention is that the insert post has a mounting groove that engages with the second reset spring, and the radial width of the annular portion covers the arc-shaped through slot opening.

[0026] Further features of this invention: the outer circumferential surface of the rotary lock is provided with knurling or friction texture, the second end face of the base is provided with a frustum, and the third end face of the rotary lock is provided with a fitting groove for inserting and rotating with the frustum.

[0027] A further feature of this invention is that the rotation direction of the locking position of the rotary lock is the same as the flight rotation direction of the propeller motor and the propeller.

[0028] The beneficial effects of this utility model are as follows: the propeller motor and the drone arm are pre-installed and fixed, and the propeller and the cover are pre-installed and fixed. The axial interlock is completed when the cover is inserted into the shaft and the rotary lock is unlocked through the axial limiting cooperation of the shaft and the rotary lock. This axial interlock further ensures the engagement and retention of the synchronous groove and the synchronous protrusion, so that the base and the limiting connector that rotate coaxially with the propeller motor can drive the cover and the propeller to rotate synchronously.

[0029] Simultaneously, with the cooperation of the first return spring, the second return spring, the elastic locking element, the upper locking groove, and the unlocking groove, when the rotating locking element enters the lowering elastic locking element at the insertion shaft, the elastic locking element leaves the unlocking groove and enters the upper locking groove. The rotating locking element is no longer restricted circumferentially by the elastic locking element and rotates towards the upper locking position under the release drive of the second spring. Figure 3In the clockwise direction (the direction where the insertion post is close to the locking end), the first radially extending protrusion enters the axial disengagement path of the second radially extending protrusion as it rotates, blocking the disengagement of the inserted shaft, thereby completing the axial limit. With the circumferential synchronous limit of the synchronous groove and synchronous protrusion, the propeller is quickly assembled to form a stable integrated flight motion structure.

[0030] When the propeller stops and needs to be disassembled, simply stabilize the base and simultaneously rotate the rotating lock towards the unlocking position (the unlocking end is close to the insertion post, and the second return spring is compressed). At this time, the first radial extension protrusion moves away from the axial exit path of the second radial extension protrusion as it rotates, and the insertion gap is aligned with the axial exit path of the second radial extension protrusion. The cover can then be easily pulled out, completing the disassembly.

[0031] The design that the included angle between the locking end and the unlocking end is consistent with the radial angle between the unlocking groove and the locking groove ensures that when the rotary lock is driven by the second reset spring to rotate, the elastic lock leaves the unlocking groove and enters the locking groove. After that, the locking groove and the unlocking groove are misaligned, and the elastic lock remains temporarily in the locking groove.

[0032] When disassembling the rotating lock, the upper locking groove and the unlocking groove return to their aligned positions, and the inserted shaft disengages. Under the action of the first return spring, the elastic lock rises, and part of the lug enters the unlocking groove while the other part remains in the upper locking groove. This design keeps the rotating lock in the unlocking position. In this way, when reassembling the cover, the operation of rotating the lock can be eliminated, and the inserted shaft can be pressed down directly to complete the locking, further reducing the operation steps and improving assembly efficiency. Attached Figure Description

[0033] Figure 1 The structure of this utility model embodiment Figure 1 ;

[0034] Figure 2 The structure of this utility model embodiment Figure 2 ;

[0035] Figure 3 The structure of this utility model embodiment Figure 3 ;

[0036] Figure 4 The structure of this utility model embodiment Figure 4 ;

[0037] Figure 5 The structure of this utility model embodiment Figure 5 ;

[0038] Figure 6 The structure of this utility model embodiment Figure 6 ;

[0039] Figure 7 The structure of this utility model embodiment Figure 7 ;

[0040] Figure 8 The structure of this utility model embodiment Figure 8 .

[0041] Among them, 1-propeller, 11-first mounting screw hole, 2-propeller motor, 21-second mounting screw hole, 3-elastic locking element, 31-central shaft, 32-spring hole, 33-lug, 4-base, 41-first end face, 42-second end face, 43-third mounting countersunk hole, 44-locking groove, 5-rotary locking element, 51-third end face, 52-fourth end face, 53-unlocking groove, 54-shaft hole, 55-limiting groove, 56-first radially extending protrusion, 57-arc-shaped through groove, 571- 572-Unlocking end, 6-Limiting connector, 61-Circular ring, 62-Fifth end face, 63-Sixth end face, 64-Insertion post, 65-Synchronous protrusion, 7-Cover, 71-Seventh end face, 72-Eighth end face, 721-Sixth mounting screw hole, 722-Guide shaft, 73-Insertion shaft, 74-Second radial extension protrusion, 741-Arched top surface, 742-Arched high point, 743-Arched bottom point, 75-Synchronous groove, 81-First return spring, 82-Second return spring.

[0042] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual size of the product. Furthermore, the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Detailed Implementation

[0043] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0044] like Figure 1-7 As shown, a quick-release propeller clamping mechanism for a drone propeller 1 is disclosed. The drone includes a propeller 1 and a propeller motor 2. The propeller 1 and the propeller motor 2 are respectively provided with a first mounting screw hole 11 and a second mounting screw hole 21. The propeller clamping mechanism includes an elastic locking component 3, a base 4, a rotating locking component 5, a limiting connecting component 6, a cover 7, a first return spring 81, and a second return spring 82.

[0045] The base 4 is fixed to the second mounting screw hole 21 of the propeller motor 2 with screws and rotates synchronously on the same axis. The base 4 is provided with a number of fourth mounting screw holes 45. The rotary locking member 5 is coaxially rotated with the base 4, including the rotation direction of the locking position and the rotation direction of the unlocking position. The rotary locking member 5 is provided with a shaft hole 54 through it along the axial direction, and a number of arc-shaped through grooves 57 are provided at equal intervals around the center. The limiting connector 6 includes a ring part 61. The ring part 61 is located between the circumferential position of the rotary locking member 5 and the shaft, and slides with the axial end face of the rotary locking member 5 to limit its axial movement. The inner diameter of the ring part 61 is larger than the diameter of the shaft hole 54. The ring part 61 is provided with a pin 64 extending through each arc-shaped through groove 57, and each pin is fixed with a screw in each fourth mounting screw hole 45.

[0046] One end of the cover 7 is fixed with the first mounting screw hole 11 of the propeller 1 and is coaxial with the propeller 1. The other end of the cover 7 is provided with an insertion shaft part 73 that is inserted into the axial limiting groove 55, and a number of synchronous grooves 75 are provided around the insertion shaft part 73. The annular part 61 is provided with a number of synchronous protrusions 65 that are fitted into the synchronous grooves 75 in the same position and shape.

[0047] The second return spring 82 is disposed inside the rotary lock 5, driving the rotary lock 5 to rotate continuously in the direction of the upper locking position. The elastic lock 3 and the first return spring 81 are disposed at the shaft hole 54. The first return spring 81 drives the elastic lock 3 to perform a separable axial interlock with the insertion shaft 73, so that the synchronous groove 75 and the synchronous protrusion 65 remain engaged.

[0048] The propeller motor 2 drives the base 4 and the limiting connector 6 to rotate synchronously, and the synchronous protrusion 65 drives the cover 7 and the propeller 1 to rotate synchronously. The cover 7 and the rotating lock 5 are detachably axially assembled.

[0049] The elastic locking member 3 includes a central shaft portion 31, with a spring hole 32 at one end of the central shaft portion 31 and a lug portion 33 radially arranged on the outer peripheral surface;

[0050] The base 4 includes a first end face 41 adjacent to the second mounting screw hole 21 and a second end face 42 at the other end. The base 4 is provided with a third mounting countersunk hole 43 that penetrates the first end face 41 and the second end face 42 and is aligned with the position of the second mounting screw hole 21. An upper locking groove 44 adapted to the cross-sectional shape of the elastic locking member 3 is provided at the center of the second end face 42. The axial depth of the upper locking groove 44 is adapted to the axial thickness of the lug 33. The lug 33 of the elastic locking member 3 is inserted into the upper locking groove 44. The first return spring 81 is compressed between the spring hole 32 and the bottom surface of the upper locking groove 44, driving the lug 33 to extend out of the upper locking groove 44 axially.

[0051] The rotary lock 5 includes a third end face 51 adjacent to the second end face 42 and a fourth end face 52 at the other end. An unlocking groove 53 is provided at the center of the third end face 51. The shape of the unlocking groove 53 is the same as that of the upper lock groove 44 and its depth is less than the thickness of the lug 33. The radial angle of the unlocking groove 53 is offset from that of the upper lock groove 44. A central hole 54 is provided at the center of the unlocking groove 53, which extends to the fourth end face 52. The central shaft portion 31 of the elastic lock 3 extends into the central hole 54.

[0052] An axial limiting groove 55 communicating with the shaft hole 54 is provided at the center of the fourth end face 52. A plurality of first radially extending protrusions 56 are equally spaced around the center at the opening of the axial limiting groove 55, and an insertion gap 561 is provided between the plurality of first radially extending protrusions 56. A plurality of arc-shaped through grooves 57 extending to the third end face 51 are equally spaced around the center of the fourth end face 52. The diameter of the plurality of arc-shaped through grooves 57 is larger than the diameter of the axial limiting groove 55. The arc-shaped through grooves 57 include a locking end 571 and an unlocking end 572. The included angle between the locking end 571 and the unlocking end 572 is consistent with the radial angle between the unlocking groove 53 and the locking groove 44.

[0053] The limiting connector 6 includes a ring portion 61, which includes a fifth end face 62 adjacent to the fourth end face 52 and a sixth end face 63 at the other end. The fifth end face 62 is provided with a plurality of insertion posts 64 at equal intervals around the center. The plurality of insertion posts 64 extend into each arc-shaped through groove 57. Each arc-shaped through groove 57 is provided with a second return spring 82, and the second return spring 82 is located between the insertion post 64 and the unlocking end 572. The second return spring 82 continuously drives the rotating lock 5 to rotate toward the insertion post 64 toward the locking end 571.

[0054] The sixth end face 63 is provided with a plurality of synchronous protrusions 65 along the axial direction;

[0055] The insert 64 passes through the arc-shaped through groove 57 and is adjacent to the second end face 42. The second end face 42 and the insert 64 are respectively provided with the fourth mounting screw hole 45 and the fifth mounting screw hole. The insert 64 is fixed to the second end face 42 by screws.

[0056] The cover 7 includes a seventh end face 71 adjacent to the sixth end face 63 and an eighth end face 72 at the other end. The seventh end face 71 is provided with an insertion shaft portion 73 that is inserted into the axial limiting groove 55. The diameter of the insertion shaft portion 73 is less than or equal to the outer diameter of the first radially extending protrusion 56, and a plurality of second radially extending protrusions 74 are equally distributed radially on the outer circumferential surface. The outer diameter of the plurality of second radially extending protrusions 74 is adapted to the diameter of the axial limiting groove 55, and enters the axial limiting groove 55 through the insertion gap 561.

[0057] The seventh end face 71 is provided with a plurality of synchronous grooves 75, which are respectively fitted into each synchronous protrusion 65. The propeller motor 2 drives the base 4 and the limiting connector 6 to rotate, and the fitting of the synchronous protrusion 65 drives the cover 7 and the propeller 1 to rotate.

[0058] The eighth end face 72 is provided with a sixth mounting screw hole 721 that is aligned with the first mounting screw hole 11 of the propeller 1, and is fixed to the propeller 1 with screws;

[0059] The insertion shaft portion 73 of the cover 7 extends axially into the axial limiting groove 55, presses down against the central shaft portion 31, drives the lug portion 33 to leave the unlocking groove 53 and enter the upper locking groove 44, the rotating lock 5 loses the limiting of the lug portion 33, the second return spring 82 drives the first radially extending protrusion 56 to rotate to the path of the second radially extending protrusion 74 axially disengaging, and keeps blocking the insertion shaft portion 73 from leaving the axial limiting groove 55.

[0060] The second radially extending protrusion 74 of the insertion shaft portion 73 includes an outer peripheral surface and an arc-shaped top surface 741. The diameter of the outer peripheral surface is adapted to the diameter of the axial limiting groove 55. The arc-shaped top surface 741 faces the propeller 1 and includes an arc height point 742 relatively close to the propeller 1 and an arc bottom point 743 relatively far away from the propeller 1. The arc bottom point 743 is opposite to the locking position rotation direction of the first radially extending protrusion 56, guiding the first radially extending protrusion 56 to slide along the arc-shaped top surface 741 past the second radially extending protrusion 74.

[0061] A guide shaft 722 is provided at the center of the eighth end face 72, and the sixth mounting screw hole 721 is provided around the guide shaft 722. A guide hole is provided on the propeller 1 at the position and diameter corresponding to the guide post.

[0062] The insert 64 is provided with a mounting groove that engages with the second return spring 82, and the radial width of the annular portion 61 covers the opening of the arc-shaped through groove 57.

[0063] The outer circumferential surface of the rotary lock 5 is provided with knurling or friction texture, the second end face 42 of the base 4 is provided with a frustum, and the third end face 51 of the rotary lock 5 is provided with a fitting groove for inserting and rotating with the frustum.

[0064] The rotation direction of the locking position of the rotary lock 5 is the same as the flight rotation direction of the propeller motor 2 and the propeller 1.

[0065] The propeller motor 2 is pre-installed and fixed to the drone arm, and the propeller 1 is pre-installed and fixed to the cover 7. The axial interlock is completed when the cover 7 is inserted into the shaft 73 and the rotary lock 5 through the unlockable axial limiting cooperation. This axial interlock further ensures the engagement and retention of the synchronous groove 75 and the synchronous protrusion 65, so that the base 4 and the limiting connector 6, which rotate coaxially with the propeller motor 2, can drive the cover 7 and the propeller 1 to rotate synchronously.

[0066] Simultaneously, with the cooperation of the first return spring 81, the second return spring 82, the elastic locking member 3, the upper locking groove 44, and the unlocking groove 53, when the rotating locking member 5 enters the lowering elastic locking member 3 at the insertion shaft 73, the elastic locking member 3 leaves the unlocking groove 53 and enters the upper locking groove 44. The rotating locking member 5 is no longer restricted circumferentially by the elastic locking member 3 and rotates towards the upper locking position under the release drive of the second spring. Figure 3 In the clockwise direction (the direction where the insertion post 64 is close to the locking end 571), the first radial extension protrusion 56 rotates into the axial disengagement path of the second radial extension protrusion 74, blocking the disengagement of the insertion shaft 73, thereby completing the axial limit. With the circumferential synchronous limit of the synchronous groove 75 and the synchronous protrusion 65, the propeller 1 is quickly assembled to form a stable integrated flight motion structure.

[0067] When propeller 1 stops and needs to be disassembled, simply stabilize base 4 and simultaneously rotate rotating lock 5 toward the unlocking position (unlocking end 572 is close to insertion post 64, and second return spring 82 is compressed). At this time, the first radial extension protrusion 56 moves away from the axial disengagement path of the second radial extension protrusion 74 as it rotates, and the insertion gap 561 is directly opposite the axial disengagement path of the second radial extension protrusion 74. Cover 7 can be easily pulled out, completing the disassembly.

[0068] The design that the included angle between the locking end 571 and the unlocking end 572 is consistent with the radial angle between the unlocking groove 53 and the locking groove 44 ensures that when the rotating lock 5 rotates under the drive of the second return spring 82, the elastic lock 3 leaves the unlocking groove 53 and enters the locking groove 44. After that, the locking groove 44 and the unlocking groove 53 are misaligned, and the elastic lock 3 remains temporarily in the locking groove 44.

[0069] When disassembling the rotating lock 5, the upper locking groove 44 and the unlocking groove 53 return to their aligned positions, and the insertion shaft 73 disengages. Under the action of the first return spring 81, the elastic lock 3 rises, and part of the lug 33 enters the unlocking groove 53 while the other part remains in the upper locking groove 44. This design keeps the rotating lock 5 in the unlocking position. In this way, when reassembling the cover 7, the operation of rotating the lock 5 can be eliminated, and the insertion shaft 73 can be pressed down directly to complete the locking, further reducing the operation steps and improving assembly efficiency.

[0070] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A quick-release propeller clamp mechanism for a drone propeller, characterized in that: The drone includes a propeller and a propeller motor. The propeller and propeller motor are respectively provided with a first mounting screw hole and a second mounting screw hole. The propeller clamping mechanism includes an elastic locking component, a base, a rotary locking component, a limiting connecting component, a cover component, a first return spring, and a second return spring. The base is fixed to the second mounting screw hole of the propeller motor with screws and rotates synchronously on the same axis. The base is provided with several fourth mounting screw holes. The rotary lock is coaxially rotated with the base, including the rotation direction of the locking position and the rotation direction of the unlocking position. The rotary lock is provided with a shaft hole through the axis and several arc-shaped through slots are provided at equal intervals around the center. The limiting connector includes a ring part, which is located between the circumferential position of the rotary lock and the shaft. It slides with the axial end face of the rotary lock to restrict its axial movement. The inner diameter of the ring part is larger than the diameter of the shaft hole. The ring part is provided with a pin extending through each arc-shaped through slot, and each pin is fixed with a screw in each fourth mounting screw hole. One end of the cover is fixed to the first mounting screw hole of the propeller with screws and is coaxial with the propeller. The other end of the cover is provided with an insertion shaft part that is inserted into the axial limiting groove, and a number of synchronous grooves are provided around the insertion shaft part. The annular part is provided with a number of synchronous protrusions that fit into the synchronous grooves in the corresponding positions and shapes. The second return spring is disposed inside the rotary lock and drives the rotary lock to rotate continuously in the direction of the upper locking position. The elastic lock and the first return spring are disposed at the shaft hole. The first return spring drives the elastic lock to perform a separable axial interlock with the inserted shaft, so that the synchronous groove and the synchronous protrusion remain engaged. The propeller motor drives the base and the limiting connector to rotate synchronously, and the synchronous protrusion drives the cover and the propeller to rotate synchronously. The cover and the rotating lock are detachably axially assembled.

2. The quick-release propeller clamp mechanism for a drone propeller according to claim 1, characterized in that: The elastic locking component includes a central shaft portion, with a spring hole at one end of the central shaft portion and a lug portion radially provided on the outer peripheral surface. The base includes a first end face adjacent to the second mounting screw hole and a second end face at the other end. The base is provided with a third mounting countersunk hole that penetrates the first end face and the second end face and is aligned with the position of the second mounting screw hole. An upper locking groove adapted to the cross-sectional shape of the elastic lock is provided at the center position of the second end face. The axial depth of the upper locking groove is adapted to the axial thickness of the lug. The lug of the elastic lock is inserted into the upper locking groove. The first reset spring is compressed between the spring hole and the bottom surface of the upper locking groove, driving the lug to extend out of the upper locking groove axially. The rotary lock includes a third end face adjacent to the second end face and a fourth end face at the other end. An unlocking groove is provided at the center of the third end face. The shape of the unlocking groove is the same as that of the upper lock groove and its depth is less than the thickness of the lug. The radial angle of the unlocking groove is offset from that of the upper lock groove. A central hole is provided at the center of the unlocking groove, extending through to the fourth end face. The central shaft of the elastic lock extends into the central hole. An axial limiting groove communicating with a central hole is provided at the center of the fourth end face. Several first radially extending protrusions are equally spaced around the center of the groove opening, and an insertion gap is provided between the several first radially extending protrusions. Several arc-shaped through grooves penetrating to the third end face are equally spaced around the center of the fourth end face. The diameter of the several arc-shaped through grooves is larger than the diameter of the axial limiting groove. The arc-shaped through groove includes a locking end and an unlocking end. The included angle between the locking end and the unlocking end is consistent with the radial angle value of the offset between the unlocking groove and the locking groove. The limiting connector includes a circular ring portion, which includes a fifth end face adjacent to the fourth end face and a sixth end face at the other end. The fifth end face is provided with a plurality of insertion posts at equal intervals around the center. The plurality of insertion posts extend into each arc-shaped through groove. A second return spring is provided in each arc-shaped through groove. The second return spring is located between the insertion post and the unlocking end. The second return spring continuously drives the rotating lock to rotate toward the insertion post toward the locking end. The sixth end face is provided with several synchronous protrusions along the axial direction; The insertion post passes through the arc-shaped through groove and is adjacent to the second end face. The second end face and the insertion post are respectively provided with the fourth mounting screw hole and the fifth mounting screw hole. The insertion post is fixed to the second end face by screws. The cover includes a seventh end face adjacent to the sixth end face and an eighth end face at the other end. The seventh end face is provided with an insertion shaft portion that is inserted into the axial limiting groove. The diameter of the insertion shaft portion is less than or equal to the outer diameter of the first radially extending protrusion, and a plurality of second radially extending protrusions are equally distributed radially on the outer circumferential surface. The outer diameter of the plurality of second radially extending protrusions is adapted to the diameter of the axial limiting groove and enters the axial limiting groove through the insertion gap. The seventh end face is provided with several synchronous grooves, which are respectively fitted into each synchronous protrusion. The propeller motor drives the base and the limiting connector to rotate, and the fitting of the synchronous protrusion drives the cover and the propeller to rotate. The eighth end face is provided with a sixth mounting screw hole that aligns with the first mounting screw hole of the propeller and is fixed with the propeller screw. The insertion shaft of the cover extends axially into the axial limiting groove, presses down against the central shaft, drives the lug to leave the unlocking groove and enter the upper locking groove, the rotating lock loses the limiting of the lug, and the second return spring drives the first radially extending protrusion to rotate to the path of the second radially extending protrusion axially disengaging, and keeps blocking the insertion shaft from leaving the axial limiting groove.

3. The quick-release propeller clamp mechanism for a drone propeller according to claim 2, characterized in that: The second radially extending protrusion of the insertion shaft includes an outer peripheral surface and an arc-shaped top surface. The diameter of the outer peripheral surface is adapted to the diameter of the axial limiting groove. The arc-shaped top surface faces the propeller side and includes an arc height point relatively close to the propeller and an arc bottom point relatively far from the propeller. The arc bottom point is opposite to the rotation direction of the locking position of the first radially extending protrusion, guiding the first radially extending protrusion to slide along the arc-shaped top surface past the second radially extending protrusion.

4. The quick-release propeller clamp mechanism for a drone propeller according to claim 3, characterized in that: A guide shaft is provided at the center of the eighth end face, the sixth mounting screw hole is provided around the guide shaft, and a guide hole is provided on the propeller corresponding to the position and diameter of the guide post.

5. The quick-release propeller clamp mechanism for a drone propeller according to claim 4, characterized in that: The insert is provided with a mounting groove that fits into the second reset spring, and the radial width of the annular portion covers the arc-shaped through slot opening.

6. The quick-release propeller clamp mechanism for a drone propeller according to claim 5, characterized in that: The outer circumferential surface of the rotary lock is provided with knurling or friction texture, the second end face of the base is provided with a frustum, and the third end face of the rotary lock is provided with a fitting groove for inserting and rotating with the frustum.

7. The quick-release propeller clamp mechanism for a drone propeller according to claim 6, characterized in that: The rotation direction of the locking position of the rotary lock is the same as the flight rotation direction of the propeller motor and the propeller.

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