A propeller direct-drive combined motor

Abstract

The present disclosure provides a propeller direct-drive combined motor, comprising a main drive motor and a pitch adjustment motor, the main drive motor is a direct-drive outer rotor motor, comprising an inner stator and an outer rotor, the outer rotor is connected to a propeller, the inner stator is a hollow shaft structure, and there is a cavity in the shaft, the pitch adjustment motor is arranged in the cavity, the pitch adjustment motor is an inner rotor motor, comprising an outer stator and an inner rotor, and the output shaft of the inner rotor adjusts the blade spacing of the propeller through mechanical transmission. The present disclosure reduces the mechanical transmission structure of the propeller driving device, has the advantages of simple structure, low noise, high efficiency and high reliability.

Description

Technical Field

[0001] The present disclosure relates to the field of electric motors, and in particular to a propeller direct-drive combined electric motor. Background Art

[0002] The propeller drive motor consists of a main drive motor and a pitch adjustment motor. The drive motor converts the input electrical energy into kinetic energy of mechanical motion, thereby driving the propeller to provide flight driving force.

[0003] Traditional propeller drive motors use internal rotor motors for both the main drive motor and the pitch control motor. The main drive motor's shaft output torque is transmitted to the propeller via a mechanical transmission structure, driving the propeller's speed and torque. The pitch control motor's shaft output torque adjusts the propeller's blade pitch through a mechanical transmission structure. Traditional propeller drive motors require the transmission of both the main drive motor and the pitch control motor's shaft output torque to the propeller via a mechanical transmission structure. This mechanical transmission structure is complex and space-consuming, and the multi-stage transmission system is noisy, inefficient, and unreliable.

[0004] In view of this, the inventors have researched and designed a propeller direct-drive combined motor. Summary of the Invention

[0005] The present disclosure provides a propeller direct-drive combined motor, which reduces the mechanical transmission structure of the propeller drive device and has the characteristics of simple structure, low noise, high efficiency and high reliability.

[0006] According to one aspect of the present disclosure, a propeller direct-drive combined motor includes a main drive motor and an adjustable pitch motor, wherein the main drive motor is a direct-drive outer rotor motor, including an inner stator and an outer rotor, the outer rotor is connected to the propeller, the inner stator is a hollow shaft structure, and there is a cavity in the shaft, the adjustable pitch motor is arranged in the cavity, the adjustable pitch motor is an inner rotor motor, including an outer stator and an inner rotor, and the output shaft of the inner rotor adjusts the propeller blade pitch through mechanical transmission.

[0007] According to at least one embodiment of the present disclosure, the outer rotor includes a first housing, a first magnet, a turntable rear end cover and a turntable front end cover, the first magnet is bonded to the inner wall of the first housing, the turntable rear end cover is fixed to the rear end of the first housing, and the turntable front end cover is fixed to the front end of the first housing.

[0008] According to at least one embodiment of the present disclosure, the inner stator consists of a first stator armature, a stator bracket, a first stator shaft and a second stator shaft. The first stator armature and the stator bracket are press-fitted and bonded, and the stator bracket and the second stator shaft are press-fitted and bonded with an interference fit and then fastened to the first stator shaft by screws to ensure coaxiality.

[0009] According to at least one embodiment of the present disclosure, the main drive motor further includes a first front bearing and a first rear bearing, and the inner and outer rings of the first front bearing respectively cooperate with the first stator shaft and the front end cover of the turntable.

[0010] According to at least one embodiment of the present disclosure, the main drive motor further includes a first retaining spring, which is connected to the first stator shaft via a screw and serves to fix the inner ring of the first front bearing.

[0011] According to at least one embodiment of the present disclosure, the main drive motor further includes a second retaining spring, which is connected to the second stator shaft via a screw and serves to fix the inner ring of the first rear bearing.

[0012] According to at least one embodiment of the present disclosure, the rear cover and the front cover of the turntable are each provided with ventilation openings, and the ventilation openings are evenly distributed on the rear cover and the front cover of the turntable. The first housing of the main drive motor directly drives the propeller to rotate, and the wind generated by the propeller passes through the ventilation openings to cool the interior of the main drive motor.

[0013] According to at least one embodiment of the present disclosure, the outer stator includes a second housing, a second stator armature and a rear end cover of the pitch regulating motor. The second stator armature is adhesively pressed into the second housing, and the second housing is connected to the rear end cover of the pitch regulating motor by screws.

[0014] According to at least one embodiment of the present disclosure, the inner rotor includes a second magnetic steel, a rotating shaft and a rotor bushing. The rotating shaft is glued and press-fitted into the rotor bushing, and the second magnetic steel is bonded to the outer surface of the rotor bushing.

[0015] According to at least one embodiment of the present disclosure, the pitch regulating motor further includes a second front bearing and a second rear bearing, the inner and outer rings of the second front bearing respectively cooperate with the rotating shaft and the second housing, and the inner and outer rings of the second rear bearing respectively cooperate with the rotating shaft and the rear end cover of the pitch regulating motor.

[0016] After adopting the above technical solution, the present disclosure has the following beneficial effects:

[0017] 1. The main drive motor of the present invention adopts a direct drive mode. The turntable (first housing) drives the propeller to rotate. There is no mechanical transmission device, which has a simple structure, low noise, high efficiency and high reliability.

[0018] 2. The pitch regulating motor and the main drive motor of the present disclosure share a cavity, resulting in a compact structure;

[0019] 3. The propeller drive motor disclosed herein is forced to be cooled by air and has good heat dissipation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the main drive motor disclosed in the present invention.

[0023] Figure 3 It is a structural schematic diagram of the front and rear end covers of the turntable disclosed in the present invention.

[0024] Figure 4 It is a structural schematic diagram of the pitch regulating motor disclosed in the present invention. DETAILED DESCRIPTION

[0025] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the relevant content and are not intended to limit the present disclosure. It should also be noted that, for ease of description, only the portions relevant to the present disclosure are shown in the accompanying drawings.

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, the present disclosure discloses a propeller direct-drive combined motor, including a main drive motor 1 and an adjustable pitch motor 2, wherein the main drive motor 1 is a direct-drive outer rotor motor, including an inner stator 11 and an outer rotor 12, the outer rotor 12 is connected to the propeller, the inner stator 11 is a hollow shaft structure, and there is a cavity in the shaft, the adjustable pitch motor 2 is arranged in the cavity, the adjustable pitch motor 2 is an inner rotor motor, including an outer stator 21 and an inner rotor 22, and the output shaft of the inner rotor 22 adjusts the propeller blade pitch through mechanical transmission.

[0028] like Figure 2 As shown, according to at least one embodiment of the present disclosure, the outer rotor 12 includes a first housing 121, a first magnet 122, a turntable rear end cover 123 and a turntable front end cover 124, the first magnet 122 is bonded to the inner wall of the first housing 121, the turntable rear end cover 123 is fixed to the rear end of the first housing 121, and the turntable front end cover 124 is fixed to the front end of the first housing 121.

[0029] According to at least one embodiment of the present disclosure, the inner stator 11 is composed of a first stator armature 111, a stator bracket 112, a first stator shaft 113 and a second stator shaft 114. The first stator armature 111 and the stator bracket 112 are press-fitted and bonded, and the stator bracket 112 and the second stator shaft 114 are press-fitted and bonded using an interference fit and then fastened to the first stator shaft 113 by screws to ensure coaxiality.

[0030] According to at least one embodiment of the present disclosure, the main drive motor 1 further includes a first front bearing 13 and a first rear bearing 14 , wherein the inner and outer rings of the first front bearing 13 respectively cooperate with the first stator shaft 113 and the turntable front end cover 124 .

[0031] According to at least one embodiment of the present disclosure, the main drive motor 1 also includes a first retaining spring 15 and a second retaining spring 16. The first retaining spring 15 is connected to the first stator shaft 113 by screws, and serves to fix the inner ring of the first front bearing 13; the second retaining spring 16 is connected to the second stator shaft 114 by screws, and serves to fix the inner ring of the first rear bearing 14.

[0032] like Figure 3 As shown, according to at least one embodiment of the present disclosure, the turntable rear cover 123 and the turntable front cover 124 are each provided with vents 1231, and the vents are evenly distributed on the turntable rear cover and the turntable front cover. The first housing of the main drive motor directly drives the propeller to rotate, and the wind generated by the propeller passes through the vents to cool the interior of the main drive motor.

[0033] like Figure 4 As shown, according to at least one embodiment of the present disclosure, the outer stator 21 includes a second housing 211, a second stator armature 212 and a rear end cover 213 of the pitch regulating motor, the second stator armature 212 is bonded and press-fitted into the second housing 211, and the second housing 211 is connected to the rear end cover 213 of the pitch regulating motor by screws.

[0034] According to at least one embodiment of the present disclosure, the inner rotor 22 includes a second magnetic steel 221 , a rotating shaft 222 and a rotor bushing 223 . The rotating shaft 222 is glued and press-fitted into the rotor bushing 223 , and the second magnetic steel 221 is bonded to the outer surface of the rotor bushing 223 .

[0035] According to at least one embodiment of the present disclosure, the pitch regulating motor 2 further includes a second front bearing 23 and a second rear bearing 24, the inner and outer rings of the second front bearing 23 respectively cooperate with the rotating shaft 222 and the second housing 221, and the inner and outer rings of the second rear bearing 24 respectively cooperate with the rotating shaft 222 and the rear end cover 213 of the pitch regulating motor.

[0036] The main drive motor disclosed in the present invention is a direct-drive external rotor motor, which consists of an inner stator and an outer rotor. The turntable of the main drive motor's outer rotor is directly connected to the propeller blades, and the rotation of the turntable directly drives the propeller blades to rotate without the need for a mechanical transmission structure. Fan-shaped vents are evenly distributed on the turntable, and the wind brought by the propeller directly enters the main drive motor through these fan-shaped vents, taking away the heat inside the motor. The inner stator of the main drive motor is a hollow shaft structure with a cavity inside the shaft. The pitch-adjusting motor is an inner rotor motor, which consists of an outer stator and an inner rotor. The pitch-adjusting motor is embedded in the stator shaft of the main drive motor, and the output shaft adjusts the propeller blade spacing through mechanical transmission. The present invention reduces the mechanical transmission structure of the propeller drive device, and has the advantages of simple structure, low noise, high efficiency, and high reliability.

[0037] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0039] Those skilled in the art will appreciate that the above embodiments are merely intended to clearly illustrate the present disclosure and are not intended to limit the scope of the present disclosure. Other changes or modifications may be made based on the above disclosure, and such changes or modifications are still within the scope of the present disclosure.

Claims

1. A propeller direct drive combined motor, characterized in that: The main drive motor comprises a direct-drive outer rotor motor, comprising an inner stator and an outer rotor, the outer rotor being connected to the propeller, the inner stator being a hollow shaft structure with a cavity within the shaft, the pitch-adjusting motor being disposed within the cavity, and the pitch-adjusting motor being an inner rotor motor, comprising an outer stator and an inner rotor, the output shaft of the inner rotor being used to adjust the pitch of the propeller blades through mechanical transmission; The outer rotor includes a first housing, a first magnetic steel, a turntable rear end cover, and a turntable front end cover, wherein the first magnetic steel is bonded to the inner wall of the first housing, the turntable rear end cover is fixed to the rear end of the first housing, and the turntable front end cover is fixed to the front end of the first housing; The inner stator consists of a first stator armature, a stator bracket, a first stator shaft and a second stator shaft. The first stator armature and the stator bracket are press-fitted and bonded. The stator bracket and the second stator shaft are press-fitted and bonded with an interference fit and then fastened to the first stator shaft by screws to ensure coaxiality. The rear cover of the turntable and the front cover of the turntable are respectively provided with ventilation holes, and the ventilation holes are evenly distributed on the rear cover of the turntable and the front cover of the turntable; The outer stator includes a second housing, a second stator armature and a rear end cover of the pitch regulating motor. The second stator armature is adhesively pressed into the second housing, and the second housing is connected to the rear end cover of the pitch regulating motor through screws.

2. The combined motor according to claim 1, wherein: The main drive motor further includes a first front bearing and a first rear bearing, wherein the inner and outer rings of the first front bearing are respectively matched with the first stator shaft and the front end cover of the turntable.

3. The combined motor according to claim 2, wherein: The main drive motor further includes a first retaining spring, which is connected to the first stator shaft via a screw and serves to fix the inner ring of the first front bearing.

4. The combined motor according to claim 2, wherein: The main drive motor further includes a second retaining spring, which is connected to the second stator shaft via a screw and serves to fix the inner ring of the first rear bearing.

5. The combined motor according to claim 1, wherein: The inner rotor includes a second magnetic steel, a rotating shaft and a rotor bushing. The rotating shaft is glued and press-fitted into the rotor bushing, and the second magnetic steel is bonded to the outer surface of the rotor bushing.

6. The combined motor according to claim 5, wherein: The pitch regulating motor further includes a second front bearing and a second rear bearing, wherein the inner and outer rings of the second front bearing respectively cooperate with the rotating shaft and the second housing, and the inner and outer rings of the second rear bearing respectively cooperate with the rotating shaft and the rear end cover of the pitch regulating motor.

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