Motor transmission mechanism and drone

Abstract

The present invention discloses a motor transmission mechanism and an unmanned aerial vehicle, belonging to the field of aircraft technology. The motor transmission mechanism comprises: a main shaft, a motor shaft, the motor shaft is a hollow structure, the main shaft is inserted into the motor shaft, one end of the motor shaft is used to be fixedly connected with the rotor, and the other end of the motor shaft is used to be connected with the stator through a bearing; and a limit seat, the main shaft and the motor shaft are fixedly connected through the limit seat. When the rotor rotates relative to the stator, the rotor drives the motor shaft to rotate, the main shaft and the motor shaft rotate synchronously, and the main shaft is connected to the rotor of the unmanned aerial vehicle and drives the rotor to rotate. When the main shaft needs to be disassembled, the axial fixation of the main shaft by the limit seat is released from the lower end of the main shaft, so that the main shaft can slide freely in the axial direction. At this time, the main shaft can be pulled out from the motor shaft without disassembling the stator and the rotor, so that the maintenance and repair operations of the motor shaft are simple, and at the same time, the disassembly of the motor shaft is avoided to affect the dynamic balance of the motor.

Description

Technical Field

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

[0002] The power transmission of existing aircraft model helicopters, unmanned helicopters and other products is generally a pulley reduction transmission, a gear reduction transmission or a brushless motor direct drive transmission. Among them, the brushless motor direct drive transmission refers to a transmission method that uses a brushless motor to directly drive the active rotation. This transmission method has direct power transmission and low transmission loss, so it is widely used.

[0003] The brushless motor consists of a stator and a rotor. In the existing brushless motor transmission mechanism, the output shaft is directly connected to the rotor, and the rotation of the rotor drives the output shaft to rotate. However, for this transmission mechanism, the entire motor needs to be disassembled to replace the main shaft, which can easily affect the dynamic balance of the motor and cause excessive vibration of the motor. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a motor transmission mechanism, which can replace the main shaft without disassembling the motor.

[0005] The present invention also provides a drone having the above motor transmission mechanism.

[0006] The motor transmission mechanism according to the first embodiment of the present invention includes: a main shaft; a motor shaft, the motor shaft is a hollow structure, the main shaft is inserted into the motor shaft, one end of the motor shaft is used to be fixedly connected to the rotor, and the other end of the motor shaft is used to be connected to the stator through a bearing; and a limit seat, the main shaft and the motor shaft are fixedly connected through the limit seat. A first connecting part is provided on the main shaft, a second connecting part and a third connecting part are provided on the limit seat, and a fourth connecting part is provided on the motor shaft, the first connecting part cooperates with the second connecting part to fix the main shaft with the limit seat, and the third connecting part cooperates with the fourth connecting part to fix the limit seat with the motor shaft.

[0007] The motor transmission mechanism according to the embodiment of the present invention has at least the following beneficial effects: when the rotor rotates relative to the stator, the rotor drives the motor shaft to rotate, the main shaft rotates synchronously with the motor shaft, and the main shaft is connected to the rotor of the drone and drives the rotor to rotate. When the main shaft needs to be disassembled, the axial fixation of the main shaft by the limit seat is released from the lower end of the main shaft, so that the main shaft can slide freely along the axial direction. At this time, the main shaft can be pulled out from the motor shaft without disassembling the stator and the rotor, making the maintenance and repair of the motor shaft simple. At the same time, it avoids the impact of disassembly of the motor shaft on the dynamic balance of the motor.

[0008] According to some embodiments of the present invention, the first connecting part includes a first axial connecting part and a first circumferential connecting part, the second connecting part includes a second axial connecting part and a second circumferential connecting part, the first axial connecting part and the second axial connecting part cooperate to axially fix the main shaft and the limit seat, and the first circumferential connecting part and the second circumferential connecting part cooperate to circumferentially fix the main shaft and the limit seat.

[0009] According to some embodiments of the present invention, the first circumferential connecting portion is a limiting step, the second circumferential connecting portion is a first limiting groove, the shape of the limiting step matches the shape of the first limiting groove, and the limiting step is inserted in the first limiting groove.

[0010] According to some embodiments of the present invention, the first axial connection portion is a first positioning hole, the second axial connection portion is a second positioning hole, the first positioning hole and the second positioning hole correspond in position, and screws are passed through the first positioning hole and the second positioning hole.

[0011] According to some embodiments of the present invention, the third connection portion includes a third axial connection portion and a third circumferential connection portion, the fourth connection portion includes a fourth axial connection portion and a fourth circumferential connection portion, the third axial connection portion and the fourth axial connection portion cooperate to axially fix the limit seat and the motor shaft, and the third circumferential connection portion and the fourth circumferential connection portion cooperate to circumferentially fix the limit seat and the motor shaft.

[0012] According to some embodiments of the present invention, the third circumferential connecting portion is an outer wall surface of the limiting seat, and the fourth circumferential connecting portion is a second limiting groove, and a shape of the second limiting groove matches an outer contour of the limiting seat.

[0013] According to some embodiments of the present invention, the third axial connection portion is a plurality of third positioning holes, the fourth axial component is a plurality of fourth positioning holes, the third positioning holes correspond to the fourth positioning holes, and screws are passed through the third positioning holes and the fourth positioning holes.

[0014] According to some embodiments of the present invention, a connecting flange is provided at one end of the motor shaft, a limiting groove is provided on the side of the connecting flange, the limiting groove is used to fix the motor shaft and the rotor circumferentially, and a plurality of fifth positioning holes are provided on the connecting flange, the fifth positioning holes are used to fix the motor shaft and the rotor axially.

[0015] A drone according to an embodiment of a second aspect of the present invention comprises a motor transmission mechanism according to an embodiment of the first aspect of the present invention.

[0016] According to the drone of the embodiment of the present invention, by adopting the above-mentioned motor transmission mechanism, the motor main shaft can be easily replaced.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 is a schematic structural diagram of a motor transmission mechanism according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A cross-sectional view of the motor transmission mechanism shown;

[0021] Figure 3 yes Figure 1 A cross-sectional view of the motor transmission mechanism shown when connected to the stator and rotor;

[0022] Figure 4 yes Figure 1 A schematic diagram of the structure of the main shaft shown;

[0023] Figure 5 yes Figure 1 The structural schematic diagram of the motor shaft is shown;

[0024] Figure 6 yes Figure 1 The structural schematic diagram of the limit seat is shown.

[0025] Reference numerals:

[0026] Spindle 100; first connecting portion 110; limiting step 111; first positioning hole 112;

[0027] Motor shaft 200; fourth connection portion 210; second limiting groove 211; fourth positioning hole 212; connecting flange 220; limiting groove 221; fifth positioning hole 222;

[0028] The limiting seat 300; the second connecting portion 310; the first limiting groove 311; the second positioning hole 312; the third connecting portion 320; the outer wall surface 321; the third positioning hole 322;

[0029] Rotor 1; stator 2; bearing 3. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and 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 should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0034] refer to Figures 1 to 6 A motor transmission mechanism according to an embodiment of the present invention is described.

[0035] like Figures 1 to 3 As shown, the motor transmission mechanism according to the embodiment of the present invention includes: a main shaft 100, a motor shaft 200 and a stop seat 300, the motor shaft 200 is a hollow structure, the main shaft 100 is inserted into the motor shaft 200, one end of the motor shaft 200 is used to be fixedly connected to the rotor 1, and the other end of the motor shaft 200 is used to be connected to the stator 2 through the bearing 3; the main shaft 100 and the motor shaft 200 are fixedly connected through the stop seat 300. The main shaft 100 is provided with a first connecting portion 110, the stop seat 300 is provided with a second connecting portion 310 and a third connecting portion 320, and the motor shaft 200 is provided with a fourth connecting portion 210.

[0036] For example, Figures 1 to 3As shown, the main shaft 100 is cylindrical, and a circular through hole is provided on the motor shaft 200. The main shaft 100 is arranged in the circular through hole. The lower end of the main shaft 100 is fixedly connected with the lower end of the motor shaft 200 through a limit seat 300, so that the rotation of the motor shaft 200 drives the main shaft 100 to rotate synchronously. The clearance between the circular through holes in the main shaft 100 and the motor shaft 200 is controlled at 0.005mm to ensure that the vibration of the main shaft 100 is small when the high-speed rotation is performed. Specifically, the motor shaft 200 is arranged in the stator 2 and the rotor 1 of the motor, the lower end of the motor shaft 200 is fixedly connected with the rotor 1, and the upper end of the motor shaft 200 is connected with the stator 2 through a bearing 3, and the motor shaft 200 can rotate axially relative to the stator 2. When the rotor 1 rotates relative to the stator 2, the rotor 1 drives the motor shaft 200 to rotate, and the main shaft 100 rotates synchronously with the motor shaft 200. The main shaft 100 is connected to the rotor of the drone and drives the rotor to rotate. When the main shaft 100 needs to be disassembled, the axial fixation of the main shaft 100 by the limit seat 300 is released from the lower end of the main shaft 100, so that the main shaft 100 can slide freely in the axial direction. At this time, the main shaft 100 can be pulled out from the motor shaft 200 without disassembling the stator 2 and the rotor 1, so that the maintenance and repair operations of the motor shaft 200 are simple. At the same time, the disassembly and assembly of the motor shaft 200 does not affect the dynamic balance of the motor.

[0037] In some specific embodiments of the present invention, the first connecting portion 110 cooperates with the second connecting portion 310 to fix the main shaft 100 and the limiting seat 300. Figure 4 and Figure 6 As shown, a first connecting portion 110 is provided at the lower end of the main shaft 100, and a second connecting portion 310 is provided at the upper end of the limiting seat 300. The first connecting portion 110 includes a first axial connecting portion and a first circumferential connecting portion, and the second connecting portion 310 includes a second axial connecting portion and a second circumferential connecting portion. The first axial connecting portion and the second axial connecting portion cooperate to axially fix the main shaft 100 and the limiting seat 300, and the first circumferential connecting portion and the second circumferential connecting portion cooperate to circumferentially fix the main shaft 100 and the limiting seat 300.

[0038] Specifically, the first circumferential connection part is the limiting step 111, and the second circumferential connection part is the first limiting groove 311. The shape of the limiting step 111 matches the shape of the first limiting groove 311, and the limiting step 111 is inserted in the first limiting groove 311; the two side planes of the limiting step 111 match the two side wall surfaces of the first limiting groove 311, and the single-sided assembly reserved clearance is controlled within 0.01mm, ensuring that the limiting step 111 can be smoothly inserted into the first limiting groove 311 and there will be no obvious gap in the direction of rotation, so that the torque of the motor shaft 200 can be transmitted to the main shaft 100 to drive the aircraft to work. It can be imagined that the main shaft 100 and the limiting seat 300 can also be fixed circumferentially through common mechanical structures such as flat keys or splines, but it is not limited to this. The first axial connection part is the first positioning hole 112, and the second axial connection part is the second positioning hole 312. The first positioning hole 112 and the second positioning hole 312 are located in corresponding positions, and screws are inserted into the first positioning hole 112 and the second positioning hole 312. By screwing the screws into the first positioning hole 112 and the second positioning hole 312, it is ensured that the spindle 100 will not be loosened in the up and down direction. When the spindle 100 is mainly disassembled, the screws are screwed out to release the constraint of the spindle 100 in the up and down direction, and the spindle 100 can be pulled out upward from the motor shaft 200.

[0039] In some specific embodiments of the present invention, the third connection portion 320 cooperates with the fourth connection portion 210 to fix the limit seat 300 and the motor shaft 200. Figure 5 and Figure 6 As shown, the third connection part 320 includes a third axial connection part and a third circumferential connection part, and the fourth connection part 210 includes a fourth axial connection part and a fourth circumferential connection part. The third axial connection part and the fourth axial connection part cooperate to axially fix the limit seat 300 and the motor shaft 200, and the third circumferential connection part and the fourth circumferential connection part cooperate to circumferentially fix the limit seat 300 and the motor shaft 200.

[0040] Specifically, the third circumferential connection portion is the outer wall surface 321 of the limit seat 300, and the fourth circumferential connection portion is the second limit groove 211. The shape of the second limit groove 211 matches the outer contour of the limit seat 300. The outer contour of the limit seat 300 is a rectangle with rounded corners. The limit seat 300 is embedded in the second limit groove 211. Because the outer contour of the limit seat 300 is not circular, the limit seat 300 is circumferentially fixed to the motor shaft 200. The three axial connection portions are a plurality of third positioning holes 322, and the fourth axial assembly is a plurality of fourth positioning holes 212. The third positioning holes 322 correspond to the fourth positioning holes 212 in position, and screws are inserted into the third positioning holes 322 and the fourth positioning holes 212. The limit seat 300 is fixed to the motor shaft 200 by screwing screws into the third positioning holes 322 and the fourth positioning holes 212.

[0041] In some specific embodiments of the present invention, a connecting flange 220 is provided at one end of the motor shaft 200, and a limiting groove 221 is provided on the side of the connecting flange 220. The limiting groove 221 is used to fix the motor shaft 200 and the rotor 1 circumferentially. A plurality of fifth positioning holes 222 are provided on the connecting flange 220. The fifth positioning holes 222 are used to fix the motor shaft 200 and the rotor 1 axially. For example, Figure 3 and Figure 5 As shown, the connecting flange 220 is embedded in the rotor 1, the limiting groove 221 limits the circumferential rotation of the motor shaft 200 through the contour, and the fifth positioning hole 222 limits the axial sliding of the motor shaft 200 by passing screws.

[0042] A drone according to an embodiment of a second aspect of the present invention comprises a motor transmission mechanism according to an embodiment of the first aspect of the present invention.

[0043] According to the drone of the embodiment of the present invention, by adopting the above-mentioned motor transmission mechanism, the motor main shaft 100 can be easily maintained and repaired, and repeated disassembly and assembly to avoid affecting the dynamic balance of the motor.

[0044] Other components and operations of the drone according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A motor transmission mechanism, characterized in that: include: spindle(100); A motor shaft (200), the motor shaft (200) being a hollow structure, the main shaft (100) being inserted into the motor shaft (200), one end of the motor shaft (200) being used for being fixedly connected to the rotor (1), and the other end of the motor shaft (200) being used for being connected to the stator (2) via a bearing (3); and A limiting seat (300), wherein the main shaft (100) and the motor shaft (200) are fixedly connected via the limiting seat (300); a first connecting portion (110) is provided on the main shaft (100), a second connecting portion (310) and a third connecting portion (320) are provided on the limiting seat (300), and a fourth connecting portion (210) is provided on the motor shaft (200); the first connecting portion (110) cooperates with the second connecting portion (310) to fix the main shaft (100) and the limiting seat (300), and the third connecting portion (320) cooperates with the fourth connecting portion (210) to fix the limiting seat (300) and the motor shaft (200); The first connection portion (110) includes a first axial connection portion and a first circumferential connection portion, and the second connection portion (310) includes a second axial connection portion and a second circumferential connection portion, the first axial connection portion and the second axial connection portion cooperate to axially fix the main shaft (100) and the limit seat (300), and the first circumferential connection portion and the second circumferential connection portion cooperate to circumferentially fix the main shaft (100) and the limit seat (300); The first circumferential connecting portion is a limiting step (111), the second circumferential connecting portion is a first limiting groove (311), the shape of the limiting step (111) is consistent with the shape of the first limiting groove (311), and the limiting step (111) is inserted into the first limiting groove (311); The first axial connection portion is a first positioning hole (112), the second axial connection portion is a second positioning hole (312), the first positioning hole (112) and the second positioning hole (312) correspond in position to each other, and screws are inserted into the first positioning hole (112) and the second positioning hole (312); The third connection portion (320) includes a third axial connection portion and a third circumferential connection portion, and the fourth connection portion (210) includes a fourth axial connection portion and a fourth circumferential connection portion, the third axial connection portion and the fourth axial connection portion cooperate to axially fix the limit seat (300) and the motor shaft (200), and the third circumferential connection portion and the fourth circumferential connection portion cooperate to circumferentially fix the limit seat (300) and the motor shaft (200); The third circumferential connection portion is an outer wall surface (321) of the limiting seat (300), and the fourth circumferential connection portion is a second limiting groove (211), and the shape of the second limiting groove (211) is consistent with the outer contour of the limiting seat (300); The third axial connection portion is a plurality of third positioning holes (322), the fourth axial assembly is a plurality of fourth positioning holes (212), the third positioning holes (322) and the fourth positioning holes (212) correspond in position to each other, and screws are inserted into the third positioning holes (322) and the fourth positioning holes (212).

2. The motor transmission mechanism according to claim 1, characterized in that: A connecting flange (220) is provided at one end of the motor shaft (200), a limiting groove (221) is provided on the side of the connecting flange (220), the limiting groove (221) is used to circumferentially fix the motor shaft (200) and the rotor (1), and a plurality of fifth positioning holes (222) are provided on the connecting flange (220), the fifth positioning holes (222) are used to axially fix the motor shaft (200) and the rotor (1).

3. A drone, characterized in that: It includes the motor transmission mechanism as claimed in claim 1 or 2.

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