Dual-rotor motor and apparatus

Abstract

The embodiment of the utility model discloses a birotor motor and equipment, the motor comprises a casing, and an outer rotor and an inner rotor which are installed in the casing, the outer rotor comprises a rotor support, the rotor support is rotatably installed in the casing, and the middle part of the front end of the rotor support is connected with an outer rotor front shaft; the middle of the rear end of the rotor support is connected with an outer rotor rear shaft, the outer rotor front shaft is sleeved with a front outer bearing, the outer rotor rear shaft is sleeved with a rear outer bearing, and the front outer bearing and the rear outer bearing are installed at the front end and the rear end of the machine shell respectively; the inner rotor comprises a motor output shaft, the motor output shaft extends out of the front end of the machine shell, the front end of the motor output shaft is sleeved with a front inner bearing, the rear end of the motor output shaft is sleeved with a rear inner bearing, and the front inner bearing is installed in the front shaft of the outer rotor and located in a center hole of the front outer bearing. The rear inner bearing is installed in the outer rotor rear shaft and located at a center hole of the rear outer bearing. According to the utility model, the length of the double-rotor motor can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric motors, and in particular to a dual-rotor electric motor and equipment. Background Technology

[0002] Due to the advantages of twin-rotor motors, they are increasingly appearing in various applications. A twin-rotor motor consists of an inner rotor and an outer rotor. Typically, the inner rotor is connected to the motor's output shaft, with a first bearing fitted at both the front and rear ends of the output shaft. A second bearing is fitted at both the front and rear ends of the outer rotor. The first and second bearings at the front and rear ends are spaced apart axially. Because both the first and second bearings are axially aligned, the overall length of the motor is relatively large, resulting in a larger overall size and weight. Utility Model Content

[0003] The purpose of this invention is to provide a dual-rotor motor and equipment that can reduce the overall length of the motor, thereby helping to reduce the overall size and weight of the motor.

[0004] To achieve the above objectives, this utility model provides a dual-rotor motor. The motor includes a housing and an outer rotor and an inner rotor installed within the housing. The outer rotor includes a rotor support rotatably mounted within the housing. A front shaft for the outer rotor is located at the center of the front end of the rotor support, and a rear shaft for the outer rotor is located at the center of the rear end of the rotor support. A front outer bearing is fitted onto the front shaft, and a rear outer bearing is fitted onto the rear shaft. The front and rear outer bearings are respectively installed at the front and rear ends of the housing. The inner rotor includes a motor output shaft extending from the front end of the housing. A front inner bearing is fitted onto the front end of the motor output shaft, and a rear inner bearing is fitted onto the rear end of the motor output shaft. The front inner bearing is installed inside the front shaft of the outer rotor and located at the center hole of the front outer bearing. The rear inner bearing is installed inside the rear shaft of the outer rotor and located at the center hole of the rear outer bearing.

[0005] Optionally, the outer rotor may further include an iron core and a coil unit mounted on the rotor support.

[0006] Optionally, the inner rotor further includes a permanent magnet and a squirrel cage bar, wherein the permanent magnet is coaxially disposed on the motor output shaft and the squirrel cage bar is disposed on the permanent magnet.

[0007] Optionally, the rear shaft of the outer rotor is connected to a brake located on the outside of the housing.

[0008] Optionally, the brake is mounted on the rear end of the housing.

[0009] Optionally, the brake is mounted on the outer side wall of the housing, and the rear shaft of the outer rotor and the brake shaft of the brake are connected in a drive connection.

[0010] Optionally, the rear axle of the outer rotor and the brake shaft are connected by a gear transmission.

[0011] Optionally, the gear includes an outer rotor gear coaxially connected to the rear axle of the outer rotor and a brake gear coaxially connected to the brake shaft, wherein the outer rotor gear and the brake gear mesh.

[0012] To achieve the above objectives, this utility model embodiment also provides a device including the dual-rotor motor as described above.

[0013] In this embodiment of the invention, the front outer bearing is installed at the front end of the housing and sleeved on the front shaft of the outer rotor. The front inner bearing is installed inside the front shaft of the outer rotor and located at the center hole of the front outer bearing. The rear outer bearing is installed at the rear end of the housing and sleeved on the rear shaft of the outer rotor. The rear inner bearing is installed inside the rear shaft of the outer rotor and located at the center hole of the rear outer bearing. Thus, the front outer bearing is sleeved outside the front inner bearing, and the two are at least partially opposite each other radially. Similarly, the rear outer bearing is sleeved outside the rear inner bearing, and the two are at least partially opposite each other radially. Compared to the traditional method of axially spaced bearings, this embodiment of the invention can effectively reduce the length of the dual-rotor motor, thereby reducing its size and weight. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a dual-rotor motor according to an embodiment of the present invention.

[0016] Figure 2 for Figure 1 A schematic diagram of the radial cross-sectional structure of section A.

[0017] Figure 3 This is a schematic diagram of the structure of a dual-rotor motor according to another embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Example 1

[0021] Please see Figure 1 and Figure 2 This embodiment discloses a dual-rotor motor, which includes a housing 1 and an outer rotor 2 and an inner rotor 3 installed inside the housing 1.

[0022] The outer rotor 2 includes a rotor support 21, which is rotatably mounted inside the housing 1. The front end of the rotor support 21 has an outer rotor front shaft 22 (which can be integrally mounted or fixedly connected), and the rear end of the rotor support 21 has an outer rotor rear shaft 23 (which can be integrally mounted or fixedly connected). A front outer bearing 4 (circumferentially fixed) is sleeved on the outer rotor front shaft 22, and a rear outer bearing 5 (circumferentially fixed) is sleeved on the outer rotor rear shaft 23. The front outer bearing 4 and the rear outer bearing 5 are respectively mounted on the front end 11 and the rear end 12 of the housing 1.

[0023] It should be noted that the front end 11 / rear end 12 of the housing 1 referred to in this utility model may be the end wall or end cover that makes up the housing 1, depending on the actual situation.

[0024] Specifically, the front end 11 and the rear end 12 of the housing 1 are respectively provided with mounting holes for mounting the front shaft 22 and the rear shaft 23 of the outer rotor. The front end 11 and the rear end 12 of the housing 1 are also respectively provided with mounting grooves for mounting the front outer bearing 4 and the rear outer bearing 5. The mounting grooves are respectively arranged around the corresponding mounting holes.

[0025] Specifically, the rotor support 21 is cylindrical in shape.

[0026] The inner rotor 3 includes a motor output shaft 31, which extends from the front end 11 of the housing 1. The front end of the motor output shaft 31 is fitted with a front inner bearing 6 (circumferentially fixed), and the rear end of the motor output shaft 31 is fitted with a rear inner bearing 7 (circumferentially fixed). The front inner bearing 6 is installed inside the front shaft 22 of the outer rotor and is located at the center hole 41 of the front outer bearing 4. The rear inner bearing 7 is installed inside the rear shaft 23 of the outer rotor and is located at the center hole 51 of the rear outer bearing 5.

[0027] It is understandable that the front inner bearing 6 is located at the center hole 41 of the front outer bearing 4, meaning that the front inner bearing 6 and the front outer bearing 4 are at least partially opposite each other in the radial direction, which is beneficial for reducing the length of the motor. Similarly, the rear inner bearing 7 is located at the center hole 51 of the rear outer bearing 5, meaning that the rear inner bearing 7 and the rear outer bearing 5 are at least partially opposite each other in the radial direction, which is beneficial for reducing the length of the motor.

[0028] Specifically, the front shaft 22 and the rear shaft 23 of the outer rotor are respectively provided with mounting slots for mounting the front inner bearing 6 and the rear inner bearing 7.

[0029] In this embodiment of the invention, the front outer bearing 4 is installed at the front end 11 of the housing 1 and sleeved on the front shaft 22 of the outer rotor. The front inner bearing 6 is installed inside the front shaft 22 of the outer rotor and located at the center hole 41 of the front outer bearing 4. The rear outer bearing 5 is installed at the rear end 12 of the housing 1 and sleeved on the rear shaft 23 of the outer rotor. The rear inner bearing 7 is installed inside the rear shaft 23 of the outer rotor and located at the center hole 51 of the rear outer bearing 5. Thus, the front outer bearing 4 is sleeved outside the front inner bearing 6, and the two are at least partially opposite each other in the radial direction. The rear outer bearing 5 is sleeved outside the rear inner bearing 7, and the two are at least partially opposite each other in the radial direction. Compared to the conventional arrangement of bearings spaced axially, this embodiment of the invention can effectively reduce the length of the dual-rotor motor, thereby helping to reduce the size and weight of the dual-rotor motor.

[0030] In some embodiments, the outer rotor 2 also includes an iron core and coil unit 24 mounted on the rotor support 21.

[0031] In some embodiments, the inner rotor 3 further includes a permanent magnet 32 ​​and a squirrel cage bar 33, with the permanent magnet 32 ​​coaxially mounted on the motor output shaft 31 and the squirrel cage bar 33 mounted on the permanent magnet 32.

[0032] In some embodiments, the rear shaft 23 of the outer rotor is connected to a brake 8 located outside the housing 1.

[0033] Specifically, the brake 8 is mounted on the rear end 12 of the housing 1. In particular, it can be directly mounted to the rear end 12 of the housing 1 by screws or the like, or it can be indirectly mounted to the rear end 12 of the housing 1 by other connecting structures 90.

[0034] More specifically, the brake 8 includes a brake body 81 mounted on the rear end 12 of the housing 1, a brake bearing 82 installed inside the brake body 81, a brake shaft 83 installed on the inner side of the brake bearing 82, and the brake shaft 83 connected to the rear shaft 23 of the outer rotor.

[0035] Example 2

[0036] The main difference between this embodiment and Embodiment 1 is that the assembly of the brake 8 is different.

[0037] Please combine Figure 3 In this embodiment, the brake 8 is mounted on the outer side wall 13 of the housing 1, and the rear shaft 23 of the outer rotor and the brake shaft 83 of the brake 8 are connected in a transmission manner. Since the brake 8 is mounted on the side wall 13 of the housing 1, it is more advantageous to reduce the length of the motor compared to mounting it on the end of the housing 1.

[0038] Specifically, the brake 8 includes a brake body 81 mounted on the side wall 13 of the housing 1, a brake bearing 82 installed inside the brake body 81, and a brake shaft 83 installed inside the brake bearing 82.

[0039] Specifically, the rear shaft 23 of the outer rotor and the brake shaft 83 are connected by gear transmission.

[0040] More specifically, the gears include an outer rotor gear 91 coaxially connected to the rear shaft 23 of the outer rotor and a brake gear 92 coaxially connected to the brake shaft 83, with the outer rotor gear 91 and brake gear 92 meshing. Due to the meshing of the outer rotor gear 91 and brake gear 92, transmission between the rear shaft 23 of the outer rotor and the brake shaft 83 can be realized.

[0041] This utility model also discloses a device including the dual-rotor motor described in the above embodiments. Since the length of the dual-rotor motor can be effectively reduced based on the above embodiments, it is beneficial to reduce the size and weight of the dual-rotor motor, thereby facilitating the miniaturization of the device when the dual-rotor motor is used in it.

[0042] It should be noted that the terms "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] The above-disclosed examples are merely preferred embodiments of the present utility model, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of the present utility model. Therefore, equivalent variations made within the scope of the present utility model are still within the scope of the present utility model.

Claims

1. A dual-rotor electric motor, characterized in that, The electric motor includes a housing and an outer rotor and an inner rotor installed within the housing. The outer rotor includes a rotor support, which is rotatably mounted inside the housing. The front end of the rotor support has a front shaft, and the rear end of the rotor support has a rear shaft. A front outer bearing is sleeved on the front shaft, and a rear outer bearing is sleeved on the rear shaft. The front and rear outer bearings are respectively mounted on the front and rear ends of the housing. The inner rotor includes a motor output shaft that extends from the front end of the housing. A front inner bearing is fitted onto the front end of the motor output shaft, and a rear inner bearing is fitted onto the rear end of the motor output shaft. The front inner bearing is installed inside the front shaft of the outer rotor and is located at the center hole of the front outer bearing. The rear inner bearing is installed inside the rear shaft of the outer rotor and is located at the center hole of the rear outer bearing.

2. The dual-rotor motor as described in claim 1, characterized in that, The outer rotor also includes an iron core and a coil unit mounted on the rotor support.

3. The dual-rotor motor as described in claim 1 or 2, characterized in that, The inner rotor also includes a permanent magnet and a squirrel cage bar. The permanent magnet is coaxially mounted on the motor output shaft, and the squirrel cage bar is mounted on the permanent magnet.

4. The dual-rotor motor as described in claim 1, characterized in that, The rear axle of the outer rotor is connected to a brake located on the outside of the housing.

5. The dual-rotor motor as described in claim 4, characterized in that, The brake is mounted on the rear end of the housing.

6. The dual-rotor motor as described in claim 4, characterized in that, The brake is mounted on the outer side wall of the housing, and the rear shaft of the outer rotor is connected to the brake shaft of the brake.

7. The dual-rotor motor as described in claim 6, characterized in that, The rear shaft of the outer rotor and the brake shaft are connected by gear transmission.

8. The dual-rotor motor as described in claim 7, characterized in that, The gear includes an outer rotor gear coaxially connected to the rear shaft of the outer rotor and a brake gear coaxially connected to the brake shaft, wherein the outer rotor gear and the brake gear mesh.

9. A device, characterized in that, Including the dual-rotor motor as described in any one of claims 1 to 8.

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