Paddle clamp mechanism and unmanned aerial vehicle

Abstract

The invention relates to a paddle clamp mechanism and an unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicles. The invention provides a paddle clamp mechanism. The paddle clamp mechanism comprises a fixing base, a paddle clamp body and a shaft rod. According to the paddle clamp mechanism, the fixing mode of the paddle clamp body and the fixing base is changed, on one hand, the first external mounting groove and the second external mounting groove are formed in the two fixing parts on the two sides of the fixing base correspondingly, and the first bearing is arranged in the first external mounting groove of one fixing part; the first bearing is arranged in the first external mounting groove of one fixing part, and the second bearing is arranged in the second external mounting groove of the other fixing part, so that the distance between the first bearing and the second bearing is increased, the load applied to the bearings is more dispersed when the paddle clamp body swings to generate the load, and the overall service life of the first bearing and the second bearing is prolonged; on the other hand, an opening of the paddle clamp body is omitted, and the diameter of the opening is reduced, so that the overall strength of the paddle clamp body is improved, and the impact resistance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to a propeller clamp mechanism and an unmanned aerial vehicle. Background Art

[0002] The inventor has found that the propeller clamp mechanism of the existing fixed pitch propeller includes a fixing seat and a propeller clamp, and mounting holes are set on both sides of the fixing seat. The propeller clamp is connected to the mounting holes on the outer side of the fixing seat through bearings and shaft rods. The shaft rod passes through the mounting holes on both sides of the fixing seat and is fixed to the fixing seat by bolts; a through cavity is set inside the propeller clamp, and two bearings are set in the through cavity, and the two bearings are sleeved on the shaft rod.

[0003] When the unmanned aerial vehicle is working, the propeller clamp swings up and down along the fixing seat, and the propeller clamp swings up and down relative to the fixing seat through two internal bearings.

[0004] In the prior art, due to the small diameter of the shaft and the small span between the bearings, when the propeller clamp swings up and down, the bearing is subjected to excessive force, which reduces the life of the bearing. Summary of the invention

[0005] The purpose of the present invention includes providing a propeller clamp mechanism and an unmanned aerial vehicle, which improve the overall life of the first bearing and the second bearing; and also increase the overall strength of the propeller clamp body and improve the impact resistance.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides a paddle clamp mechanism, comprising:

[0008] A fixing seat, the fixing seat comprising two fixing parts arranged opposite to each other, the two fixing parts being respectively provided with a first external mounting groove and a second external mounting groove, the first external mounting groove being provided with a first bearing, and the second external mounting groove being provided with a second bearing;

[0009] A propeller clamp body, the propeller clamp body is arranged between the two fixing parts, and the propeller clamp body is used to connect the propeller blades of the unmanned aerial vehicle;

[0010] A shaft rod, wherein the shaft rod passes through the paddle clip body and the fixing portion, the first bearing and the second bearing are sleeved on the shaft rod, and the shaft rod is rotatably connected to the fixing portion through the first bearing and the second bearing.

[0011] Optionally, the fixing seat comprises a base body and a first fixing portion and a second fixing portion arranged on the base body, the first fixing portion and the second fixing portion are arranged opposite to each other and spaced to form a limiting groove, and the paddle clip body is located in the limiting groove;

[0012] The first external mounting groove and the second external mounting groove are both arranged outside the two fixing parts.

[0013] Optionally, the paddle clamp mechanism further includes a first fixing sleeve and a second fixing sleeve, wherein the first fixing sleeve and the second fixing sleeve are respectively arranged on the fixing part and sleeved on the shaft rod, and the shaft rod sequentially passes through the first bearing, the first fixing sleeve, the paddle clamp body, the second fixing sleeve and the second bearing and is fixed by a connecting member.

[0014] Optionally, a first mounting hole is provided in the first external mounting groove, a second mounting hole is provided in the second external mounting groove, and the first mounting hole and the second mounting hole are coaxially provided with the shaft rod;

[0015] The first fixing sleeve is located in the first mounting hole, and the second fixing sleeve is located in the second mounting hole.

[0016] Optionally, the first outer ring of the first bearing abuts against the first external mounting groove, and the second outer ring of the second bearing abuts against the second external mounting groove;

[0017] The shaft is connected to the first inner ring of the first bearing and the second inner ring of the second bearing, and the paddle clamp body drives the shaft, the first inner ring of the first bearing and the second inner ring of the second bearing to rotate relative to the first outer ring of the first bearing and the second outer ring of the second bearing.

[0018] Optionally, a connecting hole is provided on the paddle clamp body, and the shaft rod passes through the connecting hole;

[0019] The paddle clip body extends a first protrusion and a second protrusion toward both sides along the connecting hole, respectively. The first protrusion abuts against the first bearing, and the second protrusion abuts against the second bearing.

[0020] Optionally, the paddle clip body comprises a connecting portion, a first mounting portion and a second mounting portion, wherein the first mounting portion and the second mounting portion are respectively arranged on both sides of the connecting portion, the first mounting portion is used to mount a first paddle blade, and the second mounting portion is used to mount a second paddle blade;

[0021] The connecting portion is arranged between the two fixing portions, and a connecting hole is arranged on the connecting portion.

[0022] Optionally, a first limiting portion is disposed on one side of each of the two fixing portions, the two first limiting portions are disposed opposite to each other, and a first limiting gap is formed between the two first limiting portions and the first mounting portion;

[0023] A second limiting portion is disposed on the other side of the two fixing portions, the two second limiting portions are disposed opposite to each other, and a second limiting gap is provided between the two second limiting portions and the second mounting portion.

[0024] Optionally, the diameter of the shaft is 7-10 mm.

[0025] In a second aspect, the present invention further provides an unmanned aerial vehicle, comprising a propeller clamp mechanism as described in any one of the above items.

[0026] The propeller clamp mechanism and unmanned aerial vehicle provided by the embodiments of the present invention have the following beneficial effects:

[0027] The oar clamp mechanism provided by the present invention changes the fixing method of the oar clamp body and the fixing seat: on the one hand, by respectively arranging the first external mounting groove and the second external mounting groove on the two fixing parts on both sides of the fixing seat, the first bearing is arranged in the first external mounting groove of one of the fixing parts, and the second bearing is arranged in the second external mounting groove of the other fixing part. Such an arrangement increases the distance between the first bearing and the second bearing. Therefore, when the oar clamp body swings and generates a load, the load applied to the bearing is more dispersed, thereby increasing the overall service life of the first bearing and the second bearing; on the other hand, the opening of the oar clamp body is eliminated and the diameter of the opening is reduced, thereby increasing the overall strength of the oar clamp body and improving the impact resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of the paddle clamp mechanism provided in this embodiment;

[0030] Figure 2 An exploded view of the paddle clamp mechanism provided in this embodiment;

[0031] Figure 3 A cross-sectional exploded view of the paddle clamp mechanism provided in this embodiment;

[0032] Figure 4 A cross-sectional view of the paddle clamp mechanism provided in this embodiment;

[0033] Figure 5 A side view of the paddle clamp mechanism provided in this embodiment.

[0034] Icons: 010-paddle clamp mechanism; 100-shaft; 101-head; 102-threaded portion; 110-connector; 200-first bearing; 210-first inner ring; 220-first outer ring; 300-second bearing; 310-second inner ring; 320-second outer ring; 400-fixed seat; 401-limiting groove; 410-base body; 420-first fixing portion; 421-first external mounting groove; 422-first mounting hole; 423-first abutting portion; 43 0-second fixing portion; 431-second external mounting groove; 432-second mounting hole; 433-second abutting portion; 440-first fixing sleeve; 450-second fixing sleeve; 460-first limiting portion; 470-second limiting portion; 500-paddle clamp body; 510-connecting portion; 511-connecting hole; 512-first protrusion; 513-second protrusion; 520-first mounting portion; 521-first limiting gap; 530-second mounting portion; 531-second limiting gap. DETAILED DESCRIPTION

[0035] In the related art, in a conventional fixed-pitch multi-rotor unmanned aerial vehicle, the propeller clamp will restrict the free movement of the propeller blades in the up, down, front and back directions relative to the propeller plane. When the propeller blades rotate during the navigation of the unmanned aerial vehicle, the air convection speeds received by the propeller blades at different positions will be different, and the lift received by the blades at different positions will also be different. The relative airflow speed of the forward blades in the propeller plane is greater than that of the backward blades, so the lift generated by the forward blades is also greater than that of the backward blades.

[0036] The propeller clamp mechanism of the fixed-pitch propeller has uneven lift on both sides of the propeller clamp of the unmanned aerial vehicle. The propeller clamp restricts the free movement of the blades in the up and down, front and back directions relative to the propeller plane, resulting in the bending moment momentum generated during the blade swing process cannot be released, causing vibration.

[0037] In order to solve the vibration problem, the related technology proposes a propeller clamp mechanism 010 for a fixed pitch propeller, including a fixed seat and a propeller clamp, mounting holes are set on both sides of the fixed seat, and the propeller clamp is connected to the mounting holes on the outside of the fixed seat through bearings and shafts. Among them, the shaft passes through the mounting holes on both sides of the fixed seat and is fixed to the fixed seat by bolts; an opening is opened inside the propeller clamp, two bearings are set in the opening, and the two bearing sleeves are set on the shaft. In this way, the propeller clamp can swing up and down relative to the fixed seat through two bearings, thereby eliminating the bending moment at the root of the blade, releasing the bending moment momentum, and finally reducing the vibration of the blade.

[0038] In the above technology, due to the small diameter of the shaft, two bearings are arranged in the internal opening of the propeller clamp, and the span between the bearings is small. As a result, when the propeller clamp swings up and down, the bearings are subjected to excessive force, which reduces the life of the bearings.

[0039] In view of the above problems, the present invention provides a propeller clamp mechanism 010 and an unmanned aerial vehicle, which improve the overall life of the first bearing 200 and the second bearing 300; and also increase the overall strength of the propeller clamp body 500 and improve the impact resistance.

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0045] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0046] The overall structure and working principle of the propeller clamp mechanism 010 and the unmanned aerial vehicle provided by the present invention are described in detail below through embodiments and in conjunction with the accompanying drawings.

[0047] Please refer to Figure 1 The propeller clamp mechanism 010 provided by the present invention is applied to an unmanned aerial vehicle, which can alleviate the problem that the propeller blades cannot release the bending moment momentum due to the constraint of the propeller clamp, and avoid the propeller blades from vibrating during operation.

[0048] This embodiment provides an unmanned aerial vehicle, including a fuselage and a rotor. The rotor includes a motor and a propeller clamp mechanism 010. The motor is installed on the fuselage, and the propeller clamp mechanism 010 is connected to the motor.

[0049] In this embodiment, the unmanned aerial vehicle may be a drone, an unmanned ship, etc. Among them, the unmanned aerial vehicle may be equipped with a spraying component, a sowing component, etc. required for agriculture, so as to realize spray irrigation, sowing, etc. Of course, the unmanned aerial vehicle may also be equipped with a camera, a game device, etc.

[0050] Among them, the rotor is a fixed pitch propeller.

[0051] Please refer to Figure 1 and Figure 2 The embodiment of the present invention provides a paddle clamp mechanism 010, including a fixing seat 400, a paddle clamp body 500 and a shaft 100; the fixing seat 400 includes two fixing parts arranged opposite to each other, and the two fixing parts are respectively provided with a first external mounting groove 421 and a second external mounting groove 431, the first external mounting groove 421 is provided with a first bearing 200, and the second external mounting groove 431 is provided with a second bearing 300; the paddle clamp body 500 is arranged between the two fixing parts, and the paddle clamp body 500 is used to connect the blades of the unmanned aerial vehicle; the shaft 100 runs through the paddle clamp body 500 and the fixing part, and the first bearing 200 and the second bearing 300 are sleeved on the shaft 100, and is rotatably connected with the fixing part through the first bearing 200 and the second bearing 300.

[0052] It can be understood that the present invention changes the fixing method of the paddle clamp body 500 and the fixing seat 400: on the one hand, by respectively providing the first external mounting groove 421 and the second external mounting groove 431 on the two fixing parts of the fixing seat 400, the first bearing 200 is arranged in the first external mounting groove 421 of one of the fixing parts, and the second bearing 300 is arranged in the second external mounting groove 431 of the other fixing part. Such a setting increases the distance between the first bearing 200 and the second bearing 300. Therefore, when the paddle clamp body 500 swings and generates a load, the load applied to the bearing is more dispersed, thereby improving the overall life of the first bearing 200 and the second bearing 300; on the other hand, the opening of the paddle clamp body 500 is eliminated and the diameter of the opening is reduced, thereby increasing the overall strength of the paddle clamp body 500 and improving the impact resistance.

[0053] In this embodiment, the oar clamp mechanism 010 includes a shaft 100 .

[0054] The shaft 100 is used to penetrate the paddle clip body 500 and the fixing portion so that the two can be rotatably connected.

[0055] In this embodiment, please refer to Figure 2 and Figure 3, the shaft 100 is a hinge shaft, one end of the shaft 100 is a head 101, and the other end is a threaded portion 102; wherein, please refer to Figure 4 The shaft 100 passes through the first bearing 200, the first fixing sleeve 440, the paddle clip body 500, the second fixing sleeve 450 and the second bearing 300 in sequence, and is fixed to the threaded portion 102 through the connecting piece 110, so that the head 101 of the shaft 100 and the connecting piece 110 of the threaded portion 102 press the first bearing 200, the first fixing sleeve 440, the paddle clip body 500, the second fixing sleeve 450 and the second bearing 300.

[0056] It can be understood that the paddle clamp body 500 swings up and down in the limiting groove 401 of the fixing seat 400 around the axis direction of the shaft 100 .

[0057] It is worth mentioning that, based on the prior art, this embodiment also increases the diameter of the shaft 100. The diameter of the shaft 100 is 7-10 mm, which is 1-3 mm larger than that of the prior art.

[0058] Optionally, the diameter of the shaft 100 may be 7 mm, 8 mm, 9 mm or 10 mm.

[0059] It can be understood that by increasing the diameter of the shaft 100, the strength and rigidity of the shaft 100 are improved; at the same time, when the paddle clamp body 500 swings to generate load, the contact area between the shaft 100 and the bearing becomes larger, and the load applied to the bearing on the shaft 100 is more dispersed, thereby reducing deformation and stress concentration, and extending the service life of the first bearing 200 and the second bearing 300.

[0060] In this embodiment, the oar clamp mechanism 010 includes a first bearing 200 and a second bearing 300 .

[0061] In this embodiment, please refer to Figure 2 and Figure 3 The first bearing 200 includes a first inner ring 210, a first outer ring 220, and a first rolling element arranged between the first inner ring 210 and the first outer ring 220; wherein the first bearing 200 is arranged in a first external mounting groove 421, and the first bearing 200 and the first mounting hole 422 of the first external mounting groove 421 are coaxially arranged.

[0062] In this embodiment, please refer to Figure 2 and Figure 3 The second bearing 300 includes a second inner ring 310, a second outer ring 320 and a second rolling element arranged between the second inner ring 310 and the second outer ring 320; wherein the second bearing 300 is arranged in the second external mounting groove 431, and the second bearing 300 and the second mounting hole 432 of the second external mounting groove 431 are coaxially arranged.

[0063] Understandably, please refer to Figure 4 , under the action of the shaft 100 and the connecting member 110: on the one hand, the inner end face of the head 101 of the shaft 100, the first inner ring 210 of the first bearing 200, the first fixing sleeve 440 and the first protrusion 512 of the paddle clip body 500 abut against each other in sequence; at the same time, the second side of the first outer ring 220 of the first bearing 200 abuts against the end face of the first abutting portion 423. On the other hand, the end face of the connecting member 110, the second inner ring 310 of the second bearing 300, the second fixing sleeve 450 and the second side of the paddle clip body 500 abut against each other in sequence; at the same time, the first side of the second outer ring 320 of the second bearing 300 abuts against the end face of the second abutting portion 433.

[0064] Therefore, when the paddle clamp body 500 swings up and down, the paddle clamp body 500 drives the shaft 100, the first inner ring 210 of the first bearing 200, the first fixed sleeve 440, the second fixed sleeve 450, and the second inner ring 310 of the second bearing 300 to rotate relative to the first outer ring 220 of the first bearing 200 and the second outer ring 320 of the second bearing 300.

[0065] Among them, the first bearing 200 and the second bearing 300 can be ball bearings, roller bearings, etc.

[0066] In this embodiment, the oar clamp mechanism 010 includes a fixing seat 400 .

[0067] The fixing seat 400 is used to fix the paddle clamp mechanism 010 on the motor; at the same time, the fixing seat 400 is used to hinge and limit the paddle clamp body 500.

[0068] In this embodiment, please refer to Figure 2 and Figure 3 The fixing seat 400 includes a base body 410, a first fixing portion 420 and a second fixing portion 430; specifically, the base body 410 is a plate structure, and a plurality of openings are provided on the base body 410, and fasteners can pass through the openings to fix the base body 410 to the motor.

[0069] Specifically, the first fixing portion 420 and the second fixing portion 430 are of the same plate structure, and the first fixing portion 420 and the second fixing portion 430 are both vertically arranged on the base body 410. The first fixing portion 420 and the second fixing portion 430 are relatively arranged and spaced to form a limiting groove 401 that is horizontally penetrated along the fixing seat 400. The first external mounting groove 421 is arranged on the outer side of the first fixing portion 420, and the second external mounting groove 431 is arranged on the outer side of the second fixing portion 430.

[0070] Of course, in other embodiments, the first external mounting groove 421 is disposed on the inner side of the first fixing portion 420 , and the second external mounting groove 431 is disposed on the inner side of the second fixing portion 430 .

[0071] Please refer to Figure 3 The first external mounting groove 421 and the second mounting groove are coaxially arranged, and a first mounting hole 422 is arranged along the axis in the first external mounting groove 421. The first external mounting groove 421 is provided with an annular first abutting portion 423, and the end face of the first abutting portion 423 abuts against the inner side of the first outer ring 220 of the first bearing 200.

[0072] Please refer to Figure 3 A second mounting hole 432 is arranged along the axis in the second external mounting groove 431 . The second external mounting groove 431 is provided with an annular second abutting portion 433 . The end surface of the second abutting portion 433 abuts against the inner side of the second outer ring 320 of the second bearing 300 .

[0073] In this embodiment, please refer to Figure 3 A first fixing sleeve 440 is disposed in the first mounting hole 422, one side of the first fixing sleeve 440 abuts against the first inner ring 210 of the first bearing 200, and the other side abuts against the first protrusion 512 of the first side of the paddle clip body 500; a second fixing sleeve 450 is disposed in the second mounting hole 432, one side of the second fixing sleeve 450 abuts against the second bearing 300, and the other side abuts against the second protrusion 513 of the second side of the paddle clip body 500. The shaft 100 passes through the first bearing 200, the first fixing sleeve 440, the paddle clip body 500, the second fixing sleeve 450, and the second bearing 300 in sequence, and is fixed to the threaded portion 102 of the shaft 100 through the connecting member 110.

[0074] The fixing sleeve is used to abut against the bearing and the paddle clamp body 500 , so that the first bearing 200 , the first fixing sleeve 440 , the paddle clamp body 500 , the second fixing sleeve 450 , the second bearing 300 and the shaft 100 rotate synchronously.

[0075] Understandably, please refer to Figure 4 Under the action of the shaft 100 and the connecting member 110, the first inner ring 210 of the first bearing 200, the first fixing sleeve 440, the paddle clamp body 500, the second fixing sleeve 450 and the second inner ring 310 of the second bearing 300 are all in contact with each other; when the paddle clamp body 500 swings up and down around the axis direction of the shaft 100 in the installation groove, the paddle clamp body 500 abuts against and drives the inner ring of the first bearing 200 and the first fixing sleeve 440 to rotate, and simultaneously drives the second fixing sleeve 450 and the second inner ring 310 of the second bearing 300 to rotate.

[0076] The base body 410 , the first fixing portion 420 and the second fixing portion 430 are an integrally formed structure.

[0077] It is worth mentioning that in this embodiment, the distance between the first bearing 200 and the second bearing 300 is increased by respectively providing the first external mounting groove 421 and the second external mounting groove 431 on the fixing parts on both sides of the fixing seat 400. Therefore, when the paddle clip body 500 swings to generate load, the span between the first bearing 200 and the second bearing 300 increases, so that the load borne by the two bearings increases. At the same time, because the diameter of the shaft 100 is increased, the contact area between the shaft 100 and the first bearing 200 and the second bearing 300 increases, so that the load applied to the first bearing 200 and the second bearing 300 is more dispersed, thereby reducing deformation and stress concentration, and further improving the overall life of the first bearing 200 and the second bearing 300.

[0078] Further, in this embodiment, please refer to Figure 2 and Figure 5 A first limiting portion 460 is provided on the first side of the first fixing portion 420 and the second fixing portion 430. The two first limiting portions 460 are arranged opposite to each other and both face the limiting groove 401. The first limiting portion 460 is used to limit the swing amplitude of the first mounting portion 520 of the paddle clamp body 500.

[0079] The second sides of the first fixing portion 420 and the second fixing portion 430 respectively form second limiting portions 470 , and the two second limiting portions 470 are arranged opposite to each other and both face the limiting groove 401 ; wherein the second limiting portions 470 are used to limit the swing amplitude of the second mounting portion 530 of the paddle clamp body 500 .

[0080] It can be understood that the two first limiting portions 460 and the two second limiting portions 470 are used to cooperate to limit the swing amplitude of the paddle clamp body 500 .

[0081] In this embodiment, the paddle clamp mechanism 010 includes a paddle clamp body 500 .

[0082] The blade clamp body 500 is used to install the blades.

[0083] In this embodiment, please refer to Figure 2 and Figure 3The paddle clip body 500 includes a connecting portion 510, a first mounting portion 520, and a second mounting portion 530; specifically, the connecting portion 510 is disposed in the limiting groove 401, and a connecting hole 511 is disposed on the connecting portion 510, and the connecting hole 511 is coaxially disposed with the shaft 100, and the shaft 100 passes through the connecting hole 511 so that the paddle clip body 500 is rotatably connected to the fixing seat 400. The first mounting portion 520 and the second mounting portion 530 are respectively disposed on opposite sides of the connecting portion 510 in the transverse direction, and the first mounting portion 520 is used to mount the first paddle blade, and the second mounting portion 530 is used to mount the second paddle blade.

[0084] The connecting portion 510 of the paddle clip body 500 extends a first protrusion 512 and a second protrusion 513 along the connecting hole 511 to both sides respectively; the first protrusion 512 abuts against one side of the first fixing sleeve 440 , and the second protrusion 513 abuts against one side of the second fixing sleeve 450 .

[0085] It can be understood that the first protrusion 512 is used to abut against the first fixing sleeve 440, and the second protrusion 513 is used to abut against the second fixing sleeve 450; wherein the first protrusion 512 and the second protrusion 513 also increase the overall strength of the paddle clip body 500 and improve the impact resistance.

[0086] It is worth mentioning that the existing oar clip has an opening for installing the bearing, so as to realize the rotation of the oar clip and the fixing seat 400. In this embodiment, the opening is cancelled, and the first bearing 200 and the second bearing 300 are respectively placed on the outside of the fixing seat 400 on both sides, so that the diameter of the internal connection hole 511 of the oar clip body 500 is reduced. This arrangement increases the overall strength of the oar clip body 500 and improves the impact resistance.

[0087] It is worth mentioning that in order to limit the swing amplitude of the paddle clamp body 500, the swing amplitude of the paddle clamp body 500 is prevented from being too large.

[0088] In this embodiment, please refer to Figure 2 and Figure 5 A first limiting portion 460 is provided on one side of the first fixing portion 420 and the second fixing portion 430, and a first limiting gap 521 is provided between the two first limiting portions 460 and the first mounting portion 520; a second limiting portion 470 is provided on the other side of the first fixing portion 420 and the second fixing portion 430, and a second limiting gap 531 is provided between the two second limiting portions 470 and the second mounting portion 530.

[0089] It is understandable that, taking the first limiting gap 521 between the first mounting portion 520 and the fixing seat 400 as an example for specific description, when the first mounting portion 520 swings upward to the limit position, the upper part of the side wall of the first mounting portion 520 will contact the side wall of the first limiting portion 460 to prevent the first mounting portion 520 from continuing to swing upward, thereby controlling the swing amplitude of the first mounting portion 520. Similarly, when the first mounting portion 520 swings downward to the limit position, the lower part of the side wall of the first mounting portion 520 will contact the first limiting portion 460 to prevent the first mounting portion 520 from continuing to swing downward, thereby controlling the swing amplitude of the first mounting portion 520, thereby achieving the limitation of the paddle clip body 500.

[0090] Similarly, when the second mounting portion 530 swings upward or downward to the extreme position, the upper side wall or the lower side wall of the second mounting portion 530 contacts the side wall of the second limiting portion 470, thereby preventing the second mounting portion 530 from continuing to swing upward or downward, thereby controlling the swing amplitude of the second mounting portion 530.

[0091] The working principle and process of the paddle clamp mechanism 010 provided in the embodiment of the present invention are as follows:

[0092] After the shaft 100 passes through the first bearing 200, the first fixing sleeve 440, the paddle clip body 500, the second fixing sleeve 450 and the second bearing 300 in sequence, it is fixed to the threaded portion 102 of the shaft 100 through the connecting piece 110, so that the head 101 of the shaft 100, the first bearing 200, the first fixing sleeve 440, the paddle clip body 500, the second fixing sleeve 450, the second bearing 300 and the connecting piece 110 are in contact with each other in sequence.

[0093] When the paddle clamp body 500 swings up and down, the paddle clamp body 500 drives the shaft 100, the first inner ring 210 of the first bearing 200, the first fixed sleeve 440, the second fixed sleeve 450, and the second inner ring 310 of the second bearing 300 to swing up and down relative to the first outer ring 220 of the first bearing 200 and the second outer ring 320 of the second bearing 300.

[0094] In summary, the paddle clamp mechanism 010 provided in the embodiment of the present invention changes the fixing method of the paddle clamp body 500 and the fixing seat 400: on the one hand, by respectively providing the first external mounting groove 421 and the second external mounting groove 431 on the two fixing parts of the fixing seat 400, the first bearing 200 is arranged in the first external mounting groove 421 of one of the fixing parts, and the second bearing 300 is arranged in the second external mounting groove 431 of the other fixing part. Such a setting increases the distance between the first bearing 200 and the second bearing 300. Therefore, when the paddle clamp body 500 swings and generates a load, the load applied to the bearing is more dispersed, thereby improving the overall life of the first bearing 200 and the second bearing 300. On the other hand, the opening of the paddle clamp body 500 is eliminated and the diameter of the opening is reduced, thereby increasing the overall strength of the paddle clamp body 500 and improving the impact resistance.

[0095] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A paddle clamp mechanism, characterized in that: include: A fixing seat, the fixing seat comprising two fixing parts arranged opposite to each other, the two fixing parts being respectively provided with a first external mounting groove and a second external mounting groove, the first external mounting groove being provided with a first bearing, and the second external mounting groove being provided with a second bearing; A propeller clamp body, the propeller clamp body is arranged between the two fixing parts, and the propeller clamp body is used to connect the propeller blades of the unmanned aerial vehicle; A shaft rod, wherein the shaft rod passes through the paddle clip body and the fixing portion, the first bearing and the second bearing are sleeved on the shaft rod, and the shaft rod is rotatably connected to the fixing portion through the first bearing and the second bearing.

2. The paddle clamp mechanism according to claim 1, characterized in that: The fixing seat comprises a base body and a first fixing portion and a second fixing portion arranged on the base body, wherein the first fixing portion and the second fixing portion are arranged opposite to each other and are spaced apart to form a limiting groove, and the paddle clip body is located in the limiting groove; The first external mounting groove and the second external mounting groove are both arranged outside the two fixing parts.

3. The paddle clamp mechanism according to claim 1, characterized in that: The paddle clamp mechanism also includes a first fixing sleeve and a second fixing sleeve, wherein the first fixing sleeve and the second fixing sleeve are respectively arranged on the fixing portion and sleeved on the shaft rod, and the shaft rod sequentially passes through the first bearing, the first fixing sleeve, the paddle clamp body, the second fixing sleeve and the second bearing and is fixed by a connecting member.

4. The paddle clamp mechanism according to claim 3, characterized in that: A first mounting hole is arranged in the first external mounting groove, a second mounting hole is arranged in the second external mounting groove, and the first mounting hole and the second mounting hole are arranged coaxially with the shaft rod; The first fixing sleeve is located in the first mounting hole, and the second fixing sleeve is located in the second mounting hole.

5. The paddle clamp mechanism according to claim 1, characterized in that: The first outer ring of the first bearing abuts against the first external mounting groove, and the second outer ring of the second bearing abuts against the second external mounting groove; The shaft is connected to the first inner ring of the first bearing and the second inner ring of the second bearing, and the paddle clamp body drives the shaft, the first inner ring of the first bearing and the second inner ring of the second bearing to rotate relative to the first outer ring of the first bearing and the second outer ring of the second bearing.

6. The paddle clamp mechanism according to claim 1, characterized in that: The paddle clamp body is provided with a connecting hole, and the shaft rod passes through the connecting hole; The paddle clip body extends a first protrusion and a second protrusion toward both sides along the connecting hole, respectively. The first protrusion abuts against the first bearing, and the second protrusion abuts against the second bearing.

7. The paddle clamp mechanism according to claim 1, characterized in that: The paddle clip body comprises a connecting portion, a first mounting portion and a second mounting portion, wherein the first mounting portion and the second mounting portion are respectively arranged on both sides of the connecting portion, the first mounting portion is used to mount a first paddle blade, and the second mounting portion is used to mount a second paddle blade; The connecting portion is arranged between the two fixing portions, and a connecting hole is arranged on the connecting portion.

8. The paddle clamp mechanism according to claim 7, characterized in that: A first limiting portion is disposed on one side of each of the two fixing portions, the two first limiting portions are disposed opposite to each other, and a first limiting gap is formed between the two first limiting portions and the first mounting portion; A second limiting portion is disposed on the other side of the two fixing portions. The two second limiting portions are disposed opposite to each other, and a second limiting gap is provided between the two second limiting portions and the second mounting portion.

9. The paddle clamp mechanism according to claim 1, characterized in that: The diameter of the shaft is 7-10 mm.

10. An unmanned aerial vehicle, characterized in that: include: The paddle clamp mechanism according to any one of claims 1 to 9.

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