Double-shell external rotor motor

Abstract

The utility model discloses a double-shell external rotor motor, which comprises a stator assembly, a rotor inner shell assembly and a motor outer shell, the motor outer shell is a shell with an inner cavity, the rotor inner shell assembly and the stator assembly are respectively positioned in the inner cavity, and the rotor inner shell assembly coaxially sleeves the periphery of the stator assembly; the stator assembly is fixedly installed and connected with the motor outer shell, the rotor inner shell assembly is rotatably installed and connected with the stator assembly and the motor outer shell, and a sealing part is installed at the rotating joint of the rotor inner shell assembly and the motor outer shell; according to the utility model, the motor has the function of an inner rotor motor shaft output mode under the conditions of high power density and low cost, so that good motor dynamic balance controllability is realized, and the application scene of the motor is effectively expanded.

Description

Technical Field

[0001] The utility model belongs to the field of driving motors for industrial applications, and in particular relates to a double-shell outer rotor motor. Background Art

[0002] As the demands of modern society for market automation and intelligence continue to expand into areas such as our lives and work, higher, more reasonable, more cost-effective and more energy-saving requirements are constantly being placed on the application, fixation and output methods of drive motors.

[0003] In the current application of motors, their output modes are mainly divided into outer rotor motors and inner rotor motors, among which: outer rotor motors include the hub output rotation of the hub motor and the end cover end output rotation of the application motor, and the motor shaft and rotor of the hollow cup motor are fixed inward as support and output rotation, and the inner rotor motor uses the two ends of the motor core shaft to output rotation. Due to the high cost of inner rotor motors, the volume, weight and cost are higher than those of outer rotor motors under the same power output conditions, so they do not have an advantage in practical applications, but the axial output of inner rotor motors in many driving environments is difficult to replace; outer rotor motors have a larger rotation plane, dynamic balance control is more difficult, and it is not convenient to install and fix the output end.

[0004] Therefore, the applicant hopes to seek technical solutions to improve the above technical problems. Summary of the invention

[0005] In view of this, the purpose of the utility model is to provide a double-shell outer rotor motor, which utilizes the high power density and low cost advantages of the outer rotor permanent magnet motor structure, improves it and applies it to the output connection method that requires an inner rotor, and then applies it to the environment where the outer rotor is difficult to replace, thereby achieving the function of the motor having the output method of the inner rotor motor shaft under the conditions of high power density and low cost, thereby achieving good motor dynamic balance controllability and effectively expanding the application scenarios of the motor.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A double-shell outer rotor motor, comprising a stator assembly, a rotor inner shell assembly and a motor outer shell, wherein the motor outer shell is a shell having an inner hollow cavity, the rotor inner shell assembly and the stator assembly are respectively located in the inner hollow cavity, and the rotor inner shell assembly is coaxially sleeved on the outer periphery of the stator assembly;

[0008] The stator assembly is fixedly mounted and connected to the motor outer shell, the rotor inner shell assembly is rotatably mounted and connected to the stator assembly and the motor outer shell, and a sealing component is installed at the rotation connection between the rotor inner shell assembly and the motor outer shell.

[0009] Preferably, the rotor inner shell assembly comprises a rotor shell, a magnetic steel and an output main shaft, wherein the magnetic steel is fixedly mounted on the inner wall of the rotor shell, and the rotor shell is fixedly sleeved on the output main shaft via a rotor sleeve.

[0010] Preferably, the stator assembly includes a U-shaped stator retainer, and the rotor housing is U-shaped; wherein the U-shaped base of the stator retainer is fastened to the motor housing, and the U-shaped base of the rotor housing and the U-shaped base of the stator retainer are arranged opposite to each other on the left and right sides; the U-shaped wall of the rotor housing is sleeved on the outer periphery of the U-shaped wall of the stator retainer.

[0011] Preferably, the motor housing comprises a left motor housing and a right motor housing; wherein, the left motor housing and the right motor housing are respectively rotatably sleeved on the output main shaft, and the left motor housing and the right motor housing are correspondingly fixedly installed and connected to form the shell with an inner hollow cavity.

[0012] Preferably, the inner circumferences of the left motor housing and the right motor housing are respectively provided with bearing mounting holes, in which motor bearings are fixedly mounted, and the motor bearings are relatively rotatably sleeved on the output spindle.

[0013] Preferably, the inner circumferences of the left motor housing and the right motor housing are respectively provided with sealing component mounting holes, and the sealing component is fixedly installed in the sealing component mounting holes. The sealing component mounting holes are coaxially arranged with the bearing mounting holes of the motor housing in which they are located and are located on the outside of the bearing mounting holes, wherein the inner lip of the sealing component is sleeved on the output main shaft to achieve a sealing installation effect of the motor housing.

[0014] Preferably, the end surface of the left motor housing is provided with a groove or a flange, and the end surface of the right motor housing is provided with a flange or a groove corresponding to the groove or the flange, so that the left motor housing and the right motor housing are correspondingly socketed and positioned; and / or, the outer periphery of the left motor housing and the outer periphery of the right motor housing are respectively provided with a plurality of fastening holes, and the fastening installation between the left motor housing and the right motor housing is achieved by fasteners.

[0015] Preferably, the left motor housing and / or the right motor housing is an integral part obtained by mold casting.

[0016] Preferably, the end surface of the motor housing is disc-shaped, wherein one or more supporting feet are provided at the bottom of the motor housing, and a motor controller box is installed at the top of the motor housing.

[0017] Preferably, the sealing component includes a plurality of single-layer oil seals or a multi-layer oil seal.

[0018] The utility model proposes a double-shell outer rotor motor, which adopts the structural principle of the outer rotor motor to complete the fixation and output mode of the inner rotor motor structure, and adopts the working principle of the outer rotor motor to complete the controllability of the dynamic balance of the inner rotor motor. Specifically, a shell structure with an inner hollow cavity is proposed as the outer shell of the motor, and the rotor inner shell component and the stator component are respectively located in the inner hollow cavity. At the same time, the stator component and the outer shell of the motor are fixedly installed, and the rotor inner shell component is coaxially sleeved with the stator component in the inner hollow cavity and rotatably installed on the outer shell of the motor, and a sealing component is installed at the rotating connection between the rotor inner shell component and the outer shell of the motor to achieve a sealed installation effect; the application utilizes the high power density and low cost advantages of the outer rotor permanent magnet motor structure, improves it and applies it to the output connection mode that requires the inner rotor, and then applies it to the environment where the outer rotor is difficult to replace, so that the motor has the function of the inner rotor motor shaft output mode under the conditions of high power density and low cost, thereby achieving good motor dynamic balance controllability and effectively expanding the application scenarios of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a double-shell outer rotor motor in a specific implementation mode of the utility model;

[0020] Figure 2 yes Figure 1 A cross-sectional view of

[0021] Figure 3 It is a right side view of the double-shell outer rotor motor structure according to a specific embodiment of the utility model;

[0022] Figure 4 It is a top view of the double-shell outer rotor motor structure according to a specific embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the motor housing under a specific implementation mode of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the lower rotor inner shell assembly of a specific implementation method of the utility model. DETAILED DESCRIPTION

[0025] The utility model embodiment discloses a double-shell outer rotor motor, comprising a stator assembly, a rotor inner shell assembly and a motor outer shell, wherein the motor outer shell is a shell having an inner hollow cavity, the rotor inner shell assembly and the stator assembly are respectively located in the inner hollow cavity, and the rotor inner shell assembly is coaxially sleeved on the outer periphery of the stator assembly; the stator assembly is fixedly mounted and connected to the motor outer shell, the rotor inner shell assembly and the stator assembly are rotatably mounted and connected to the motor outer shell, and a sealing component is installed at the rotating connection between the rotor inner shell assembly and the motor outer shell.

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a double-shell outer rotor motor 1 includes a stator assembly 10, a rotor inner shell assembly 20 and a motor outer shell 30. The motor outer shell 30 is a shell with an inner hollow cavity. The rotor inner shell assembly 20 and the stator assembly 10 are respectively located in the inner hollow cavity, and the rotor inner shell assembly 20 is coaxially sleeved on the outer periphery of the stator assembly 10; the stator assembly 10 is fixedly mounted and connected to the motor outer shell 30, and the rotor inner shell assembly 20 and the stator assembly 10 and the motor outer shell 30 are rotatably mounted and connected, and a sealing component 40 is installed at the rotating connection between the rotor inner shell assembly 20 and the motor outer shell 30.

[0028] Preferably, in the present embodiment, the rotor inner shell assembly 20 includes a rotor shell 21, a magnetic steel 22 (specifically a permanent magnetic steel) and an output main shaft 24, wherein the magnetic steel 22 is fixedly mounted on the inner wall 211 of the rotor shell 21, and the rotor shell 21 is fixedly sleeved on the output main shaft 24 through a rotor sleeve 23; further preferably, in the present embodiment, the rotor shell 21 is made of a cold-rolled plate with a thickness of 2.5mm-6mm through integral die stretching, and the rotor shell 21 and the rotor sleeve 23 are fixedly mounted by welding, preferably full welding.

[0029] Preferably, in this embodiment, the stator assembly 10 includes a stator retainer 11 in a U-shape, and the rotor housing is in a U-shape; wherein, the U-shaped base 11a of the stator retainer 11 is fastened to the motor housing 30, and specifically can be locked with 4-12 screws 70; and the U-shaped base 21a of the rotor housing 21 is arranged on the left and right sides opposite to the U-shaped base 11a of the stator retainer 11; the U-shaped wall 21b of the rotor housing 21 is sleeved on the outer periphery of the U-shaped wall 11b of the stator retainer 11.

[0030] Preferably, in this embodiment, the motor housing 30 includes a left motor housing 32 and a right motor housing 33; wherein the left motor housing 32 and the right motor housing 33 are respectively rotatably sleeved on the output main shaft 24, and the left motor housing 32 and the right motor housing 33 are correspondingly fixedly installed and connected to form a shell with an inner hollow cavity.

[0031] Preferably, in order to facilitate the sealing installation effect, in this embodiment, the inner circumferences of the left motor housing 32 and the right motor housing 33 are respectively provided with bearing mounting holes 302, and the motor bearing 50 is fixedly installed in the bearing mounting holes 302, and the motor bearing 50 can be relatively rotatably sleeved on the output main shaft 24; the inner circumferences of the left motor housing 32 and the right motor housing 33 are respectively provided with sealing component mounting holes 303, and the sealing component 40 is fixedly installed in the sealing component mounting holes 303, and the sealing component mounting hole 40 is coaxially arranged with the bearing mounting hole 302 of the motor housing in which it is located and is located on the outside of the bearing mounting hole 302, wherein the inner lip of the sealing component 40 is sleeved on the output main shaft 24, thereby achieving the sealing installation effect of the motor housing 30, and then achieving the sealing of the motor 1.

[0032] Preferably, in the present embodiment, a groove 321 is provided on the end surface of the left motor housing 32 (in other embodiments, a flange may also be provided), and a flange 331 is provided on the end surface of the right motor housing 33 for corresponding installation and matching with the groove 321 (in other embodiments, a groove may also be provided accordingly), so that the left motor housing 32 and the right motor housing 33 are correspondingly socketed and positioned for installation; and / or preferably, in the present embodiment, a plurality of fastening holes (specifically bolt holes 323) are correspondingly provided on the outer periphery of the left motor housing 32, and a plurality of fastening holes (specifically bolt holes 333) are correspondingly provided on the outer periphery of the right motor housing 33, and the fastening installation between the left motor housing 32 and the right motor housing 22 is achieved by a plurality of bolts 60, and further preferably, the number of the plurality of bolt holes 323 ranges from 8 to 18.

[0033] Preferably, in the present embodiment, the left motor housing 32 and / or the right motor housing 33 are integral parts obtained by mold casting. Further preferably, in the present embodiment, the left motor housing 32 and the right motor housing 33 can be cast by the same mold to obtain a blank, and then the groove 321 of the left motor housing 32 and the flange 331 of the right motor housing 33 are obtained by further processing, and the groove 321 corresponds to the flange 331 and is engaged with each other. Further preferably, in order to facilitate the oil filling and wire outlet effect of the motor, in the present embodiment, an oil filling hole (or exhaust valve) 322 is provided on the side of the left motor housing 32, and a motor wiring harness outlet hole 332 is provided on the side of the right motor housing 33.

[0034] Preferably, in the present embodiment, the end face of the motor housing 30 is disc-shaped, wherein one or more supporting feet 301 are provided at the bottom of the motor housing 30, and further preferably, in the present embodiment, two symmetrical supporting feet 301 are provided at the bottom of the motor housing 30; a motor controller box 21 is installed at the top of the motor housing 30; wherein further preferably, in the present embodiment, a motor control board 311 is installed inside the motor controller box 31, wherein the motor control board 311 generates more heat during operation, and the motor controller box 31 also has the function of dissipating heat for the control board 311, thereby effectively improving the service life of the motor control board 311.

[0035] Preferably, in order to achieve a better sealing effect, in this embodiment, the sealing component includes multiple single-layer oil seals (specifically, 2 single-layer oil seals can be used) or a multi-layer oil seal (specifically, 2 layers of oil seals can be used).

[0036] The present embodiment proposes a double-shell outer rotor motor 1, which adopts the principle of the outer rotor motor to complete the fixing and output method of the inner rotor motor structure, and installs the stator assembly 10 and the rotor inner shell assembly 20 in an inner hollow cavity with a motor outer shell 30. The output main shaft 24 of the rotor inner shell assembly 20 serves as the power output end of the motor 1. At the same time, the left motor shell 32 and the right motor shell 33 are used to install and support the output main shaft 24 by installing the motor bearing 50, so as to effectively complete the controllability of the dynamic balance of the inner rotor motor. In this embodiment, the advantages of high power density and low cost of the outer rotor permanent magnet motor are utilized to improve the application to the output connection method requiring the inner rotor, and then apply it to the environment where the outer rotor is difficult to replace, so as to achieve the function of the motor having the inner rotor motor shaft output method under the conditions of high power density and low cost, thereby achieving good motor dynamic balance controllability and effectively expanding the application scenarios of the motor.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A double-shell outer rotor motor, characterized in that: The invention comprises a stator assembly, a rotor inner shell assembly and a motor outer shell, wherein the motor outer shell is a shell having an inner hollow cavity, the rotor inner shell assembly and the stator assembly are respectively located in the inner hollow cavity, and the rotor inner shell assembly is coaxially sleeved on the outer periphery of the stator assembly; The stator assembly is fixedly mounted and connected to the motor outer shell, the rotor inner shell assembly is rotatably mounted and connected to the stator assembly and the motor outer shell, and a sealing component is installed at the rotation connection between the rotor inner shell assembly and the motor outer shell.

2. The double-shell outer rotor motor according to claim 1, characterized in that: The rotor inner shell assembly comprises a rotor shell, a magnetic steel and an output main shaft, wherein the magnetic steel is fixedly mounted on the inner wall of the rotor shell, and the rotor shell is fixedly sleeved on the output main shaft via a rotor sleeve.

3. The double-shell outer rotor motor according to claim 2, characterized in that: The stator assembly includes a U-shaped stator retainer, and the rotor housing is U-shaped; wherein the U-shaped base of the stator retainer is fastened to the motor housing, and the U-shaped base of the rotor housing and the U-shaped base of the stator retainer are arranged opposite to each other on the left and right sides; the U-shaped wall of the rotor housing is sleeved on the outer periphery of the U-shaped wall of the stator retainer.

4. The double-shell outer rotor motor according to claim 2, characterized in that: The motor housing comprises a left motor housing and a right motor housing; wherein the left motor housing and the right motor housing are respectively rotatably sleeved on the output main shaft, and the left motor housing and the right motor housing are correspondingly fixedly installed and connected to form the housing with an inner hollow cavity.

5. The double-shell outer rotor motor according to claim 4, characterized in that: The inner circumferences of the left motor housing and the right motor housing are respectively provided with bearing mounting holes, in which motor bearings are fixedly mounted, and the motor bearings are relatively rotatably sleeved on the output main shaft.

6. The double-shell outer rotor motor according to claim 5, characterized in that: The inner circumferences of the left motor housing and the right motor housing are respectively provided with sealing component mounting holes, in which the sealing components are fixedly installed. The sealing component mounting holes are coaxially arranged with the bearing mounting holes of the motor housing in which they are located and are located on the outside of the bearing mounting holes, wherein the inner lip of the sealing component is sleeved on the output main shaft to achieve a sealing installation effect of the motor housing.

7. The double-shell outer rotor motor according to claim 4, characterized in that: The end surface of the left motor housing is provided with a groove or a flange, and the end surface of the right motor housing is provided with a flange or a groove corresponding to the groove or the flange, so that the left motor housing and the right motor housing are correspondingly socketed and positioned; and / or, the outer periphery of the left motor housing and the outer periphery of the right motor housing are respectively provided with a plurality of fastening holes, and the fastening installation between the left motor housing and the right motor housing is achieved by fasteners.

8. The double-shell outer rotor motor according to claim 4, characterized in that: The left motor housing and / or the right motor housing are / is an integral part obtained by mold casting.

9. The double-shell outer rotor motor according to claim 1, characterized in that: The end surface of the motor housing is disc-shaped, wherein one or more supporting feet are arranged at the bottom of the motor housing, and a motor controller box is installed at the top of the motor housing.

10. The double-shell outer rotor motor according to claim 1, characterized in that: The sealing component includes a plurality of single-layer oil seals or a multi-layer oil seal.

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