External rotor motor

Abstract

The utility model provides an external rotor motor, which comprises a base, a stator assembly, a rotor assembly, a rotating shaft and a shell, the rotor assembly is sleeved outside the stator assembly, the rotating shaft is supported by the rotating shaft on the base through a bearing set to synchronously rotate with the rotor assembly, the shell is arranged on the base, and the stator assembly and the rotor assembly are covered by the shell and the base together, a first installation boss is formed at the lower end of the base, and a second installation boss is formed at the upper end of the shell so that the motor can be installed on an installation structure of electrical equipment through the first installation boss and the second installation boss. According to the utility model, the stable installation between the motor and the electrical equipment can be realized without using an adapter component, the problems of overlarge installation space, tedious installation process and the like caused by the adapter component are avoided, and the external rotor motor can be adopted to output larger torsion for the electrical equipment.

Description

Technical Field

[0001] The utility model relates to the field of motor manufacturing, in particular to an outer rotor motor. Background Art

[0002] Electric motors are used as power sources on electrical equipment. For example, electric motors are installed on household appliances such as air conditioners to drive wind wheels and impellers. In order to stably install the motor on electrical equipment, the motors used in the prior art have exposed coils when leaving the factory. The electrical equipment manufacturer installs the motor to the reserved position of the electrical equipment through adapter components such as connecting pieces. However, due to the connection structure and size limitations of the adapter components, the adapter components can only be connected to the stator assembly of the inner rotor motor, which makes it impossible to use the outer rotor motor to output greater torque, and the exposed coils put higher requirements on the transportation and storage of the motor. In addition, the installation method of the adapter components makes the assembly process of the electrical equipment cumbersome, and it is necessary to reserve a larger installation space for the motor and the adapter components. Utility Model Content

[0003] The utility model provides an outer rotor motor.

[0004] Specifically, the utility model is realized by the following technical solutions:

[0005] The utility model provides an outer rotor motor for installation on electrical equipment, comprising:

[0006] A base formed at the lower portion of the outer rotor motor;

[0007] A stator assembly is arranged on the base;

[0008] A rotor assembly, sleeved outside the stator assembly, and configured to be driven to rotate by the stator assembly;

[0009] A rotating shaft connected to the rotor assembly, and supported on the base by a bearing group to rotate synchronously with the rotor assembly;

[0010] A housing, disposed on the upper portion of the base, and cooperating with the base to cover the stator assembly and the rotor assembly;

[0011] Wherein, a first mounting boss is formed at the lower end of the base, and a second mounting boss is formed at the upper end of the shell, so as to be suitable for symmetrically mounting the motor on the mounting structure of the electrical equipment through the first mounting boss and the second mounting boss.

[0012] In some embodiments, a first washer and a second washer are further included, and the first washer and the second washer are respectively sleeved on the outside of the first mounting boss and the second mounting boss.

[0013] In some embodiments, the base includes a bottom plate, a step is formed between the inner edge of the bottom plate and the inner wall of the first mounting boss, the bearing group includes a first bearing and a second bearing, and the first bearing is arranged on the inner wall of the first mounting boss close to the step.

[0014] In some embodiments, a stator body extending upward is formed on the inner edge of the bottom plate, the stator body is in the shape of a hollow cylinder, and a second bearing is disposed on the upper portion of the stator body.

[0015] In some embodiments, the stator assembly is disposed at an outer edge of the stator body and extends upwardly from the stator body for a distance, so as to support the second bearing together with the stator body.

[0016] In some embodiments, the base includes a bottom plate, an outer edge of the bottom plate forms a flange, the shell is snapped onto the surface of the bottom plate, and is connected to the outer wall of the flange by interference fit.

[0017] In some embodiments, it also includes a circuit board and a wiring port, wherein the circuit board and the wiring port are both arranged on the base plate, and the circuit board is covered by the shell, and the wiring port is arranged outside the shell, wherein the flange is provided with a through hole, and the circuit board and the wiring port are connected through the through hole.

[0018] In some embodiments, the rotor includes a rotor shell, the rotor shell surrounds the stator assembly and forms a surrounding central hole, and the end of the rotating shaft is connected to the surrounding central hole.

[0019] In some embodiments, the second mounting boss is formed with a high truncated cone and a flat truncated cone, the high truncated cone is used for mounting the motor on the mounting structure of the electrical equipment, and the flat truncated cone is used for precise forming of the second mounting boss.

[0020] In some embodiments, the second washer is formed with a high washer portion and a flat washer portion, and the high washer portion and the flat washer portion are respectively sleeved outside the high truncated cone and the flat truncated cone.

[0021] According to the embodiment of the utility model, the stator assembly and the rotor assembly are arranged on the base, and the shell and the base are used to cooperate to form a space for accommodating the stator assembly and the rotor assembly, so as to avoid damage to the inside of the motor during transportation, storage and use. By forming mounting bosses on the base and the ends of the shell respectively, a stable installation between the motor and the electrical equipment can be achieved without using adapter components, which not only avoids the problems of excessive installation space and cumbersome installation process caused by the adapter components, but also makes it possible to use an outer rotor motor to output greater torque for the electrical equipment.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 is a schematic diagram of an outer rotor motor in one embodiment of the utility model from a first viewing angle;

[0025] Figure 2 is a schematic diagram of an outer rotor motor in one embodiment of the utility model from a second viewing angle;

[0026] Figure 3 is a cross-sectional view of an outer rotor motor in one embodiment of the utility model;

[0027] Figure 4 It is an exploded view of a part of the structure of the outer rotor motor in one embodiment of the utility model;

[0028] Figure 5 is a cross-sectional view of an outer rotor motor in another embodiment of the utility model;

[0029] Figure 6 It is a cross-sectional view of an outer rotor motor in another embodiment of the utility model.

[0030] Reference numerals:

[0031] 10: base; 11: first mounting boss; 12: bottom plate; 13: stator body; 14: flange;

[0032] 20: stator assembly;

[0033] 30: rotor assembly; 31: yoke; 32: rotor housing;

[0034] 40: rotating shaft;

[0035] 50: housing; 51: second mounting boss; 511: high truncated platform; 512: flat truncated platform;

[0036] 61: first washer; 62: second washer; 621: high washer portion; 622: flat washer portion;

[0037] 71: first bearing; 72: second bearing;

[0038] 80: Circuit board. DETAILED DESCRIPTION

[0039] The present invention will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0040] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to"; the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment"; the term "another embodiment" is to be interpreted as "at least one other embodiment"; the terms "first", "second", etc. may refer to different or the same objects; the term "setting" is not limited to direct connection or indirect connection, nor is it limited to a specific connection method. Other explicit and implicit definitions may also be included below.

[0041] In the following description, some specific numerical values ​​or numerical ranges may be involved. It should be understood that these numerical values ​​and numerical ranges are merely exemplary, which may be helpful in putting the idea of ​​the present utility model into practice. However, the description of these examples is not intended to limit the scope of the present utility model in any way. According to specific application scenarios and requirements, these numerical values ​​or numerical ranges can be set separately.

[0042] As mentioned above, the prior art electrical equipment uses a motor, and the stator coil is exposed when it leaves the factory. The electrical equipment manufacturer uses a switching component to install the motor to the reserved position of the electrical equipment. The utility model at least solves the above problem, wherein the electrical equipment can be, for example, a fan or impeller of an air conditioner or household appliance, and this article takes the impeller of an air conditioner as an example for explanation.

[0043] like Figure 1-4 As shown, the outer rotor motor of the embodiment of the utility model generally includes a base 10, a stator assembly 20, a rotor assembly 30, a rotating shaft 40, a housing 50, a gasket, a bearing assembly and other structures. Among them, the stator assembly 20 and the rotor assembly 30 are used to generate output torque when energized, the rotating shaft 40 is used to transmit the torque of the rotor assembly 30 to the air-conditioning compressor, the bearing assembly is used to support the rotation of the rotor assembly 30 and the rotating shaft 40, the base 10 is used to install various parts of the motor, the housing 50 is used to cover and protect various parts installed on the base 10, and a mounting structure that matches the air-conditioning installation position is formed on the base 10 and the housing 50, and the gasket is used to provide shock absorption for the mounting structure.

[0044] In one embodiment, the base 10 is mainly composed of a bottom plate 12, which is circular as a whole, so that the bottom plate 12 has an inner edge and an outer edge, wherein the circular center of the bottom plate 12 forms a center hole by the inner edge for the rotating shaft 40 to pass through, and a flange 14 is formed in the circular outer edge area of ​​the bottom plate 12. The flange 14 can be continuously formed around the outer edge of the bottom plate 12, or can be formed in intervals and segments. The flange 14 is used to cooperate with the shell 50, and the shell 50 is snapped onto the surface of the bottom plate 12, so that the inner side of the shell 50 and the outer side of the flange 14 form an interference fit, so that the two are tightly fitted and installed.

[0045] In one embodiment, a first mounting boss 11 is formed in a center hole area of ​​the base plate 12 and extends downward along the base plate 12. The extension length of the first mounting boss 11 is sufficient to install the bearing. The hole diameter formed on the inner wall of the first mounting boss 11 is slightly larger than the center hole formed on the inner edge of the base plate 12, so that a step between the two is used to tighten the outer ring of the first bearing 71. Through this structure, the first bearing 71 is close to the base plate 12 along the axial position of the rotating shaft 40, thereby providing maximum support for the output end of the rotating shaft 40.

[0046] In one embodiment, the downward extension dimension of the first mounting boss 11 is compatible with the internal mounting structure of the air conditioner. Exemplarily, the dimension from the end of the first mounting boss 11 to the lower surface of the bottom plate 12 may be 10-30 cm.

[0047] In one embodiment, the center hole area of ​​the base plate 12 extends upward to form a stator body 13. The stator body 13 is in the shape of a hollow cylinder. The outer periphery of the stator body 13 is used to install the stator assembly 20. The upward extension dimension of the stator body 13 is slightly lower than the dimension of the stator assembly 20 in the same direction, so that the second bearing 72 can be supported on the upper end of the stator body 13. At the same time, the outer periphery of the outer ring of the second bearing 72 cooperates with the inner periphery of the stator assembly 20. The second bearing 72 is assembled together by the stator body 13 and the stator assembly 20, and there is no need to provide an additional base 10 or housing 50 structure for the second bearing 72, thereby simplifying the motor structure.

[0048] In one embodiment, the rotor assembly 30 includes a yoke 31 and a rotor shell 32, wherein the yoke 31 surrounds the outer periphery of the stator assembly 20 and is fixedly connected to the inner wall of the rotor shell 32. The rotor shell 32 is in a hollow cylindrical shape, that is, the rotor shell 32 has a surrounding side wall and a top wall covering the side wall, and a concave surrounding center hole is formed in the center of the top wall for fixedly connecting with the upper end of the rotating shaft 40, thereby transmitting the torque to the rotating shaft 40.

[0049] In one embodiment, the stator assembly 20 includes a bracket and a coil, the coil is wound on the bracket, the bottom of the bracket is supported on the upper surface of the base plate 12, the inner periphery of the bracket cooperates with the stator body 13, and the inner periphery of the bracket also provides installation for the second bearing 72.

[0050] In one embodiment, the housing 50 is in the shape of a hollow cylinder, with the opening of the cylinder facing downward and buckled on the upper surface of the bottom plate 12. The inner wall of the housing 50 cooperates with the flange 14, so as to achieve fixed installation between the housing 50 and the base 10, and together form a cavity, covering the stator assembly 20, the rotor assembly 30 and other electrical components to avoid damage by external forces. In order to achieve the installation of the motor in the air conditioner, a second mounting boss 51 is formed at the upper end of the housing 50. The second mounting boss 51 has the same function as the first mounting boss 11, and is used to cooperate with the mounting structure in the air conditioner. Through the symmetrical joint action of the first mounting boss 11 and the second mounting boss 51 at both ends of the motor, the motor can be stably and quickly installed in the air conditioner.

[0051] In one embodiment, the housing 50 may be completely enclosed. Figure 1-4 As shown, the walls of the housing 50 are all solid structures. When the housing 50 is buckled on the bottom plate, it can prevent water, moisture, dust, etc. from damaging the stator assembly, rotor assembly, bearings and other internal components of the motor. In another embodiment, the housing 50 can also be semi-enclosed (not shown in the figure), and openings or hollows are formed on the walls of the housing 50, which can at least prevent large particles or external forces from damaging the motor.

[0052] In one embodiment, the second mounting boss 51 extends upward from the top of the housing 50 to match the internal mounting structure of the air conditioner. Exemplarily, the dimension from the end of the second mounting boss 51 to the upper surface of the housing 50 may be 10-30 cm.

[0053] The shell 50 can be exemplarily cast or stamped. To ensure the molding accuracy of the second mounting boss 51, the second mounting boss 51 is designed as a stepped structure formed by a high frustum 511 and a flat frustum 512, wherein the high frustum 511 is used to install the motor on the corresponding structure of the air conditioner.

[0054] The base 10 can be illustratively formed by casting or stamping. Similarly, in order to ensure the molding accuracy of the first mounting boss 11, the first mounting boss 11 can also be designed as a stepped structure.

[0055] The motor cooperates with the air-conditioning mounting structure. To prevent the motor from being subjected to vibrations transmitted by the air-conditioning, a first washer 61 and a second washer 62 of corresponding structures are sleeved on the outside of the first mounting boss 11 and the second mounting boss 51. As described above, the second washer 62 is formed into a high washer portion 621 and a flat washer portion 622. The high washer portion 621 and the flat washer portion 622 are respectively sleeved on the outside of the high truncated cone 511 and the flat truncated cone 512.

[0056] In one embodiment, the circuit board 80 may be covered in the cavity formed by the housing 50. For example, the circuit board 80 is mounted on the bottom plate 12. To achieve electrical connection between the circuit board 80 in the cavity and the outside, a through hole is provided on the flange 14 of the bottom plate 12 to electrically connect the circuit board 80 in the cavity to the wiring port outside the cavity. In another embodiment, the circuit board 80 may not be disposed inside the motor, but may be directly connected to the stator assembly in the cavity by wiring.

[0057] According to the outer rotor motor disclosed in the embodiment of the utility model, the upper end of the rotating shaft 40 is supported by the second bearing 72. Since the second bearing 72 is fixed by the stator body 13 and the stator, the position of the second bearing 72 is as close to the upper end of the rotating shaft 40 as possible; on the other hand, the lower end of the rotating shaft 40 extends out of the base plate 12 for coupling with the air-conditioning compressor, and the lower part of the rotating shaft 40 is supported by the first bearing 71. Since the first bearing 71 is located at a step between the inner periphery of the first mounting boss 11 and the inner edge of the base plate 12, the position of the first bearing 71 is as close to the base plate 12 as possible, and together with the second bearing 72, a stable support for the rotating shaft 40 is formed.

[0058] In another embodiment, the second mounting boss 51 at the upper end of the housing 50 may be provided with an opening, so that the shaft 40 extends upward from the housing 50 to output torque, and the lower end of the shaft 40 does not need to extend from the first mounting boss 11, thereby forming an upper output shaft configuration, such as Figure 5 As shown, in this case, the first bearing 71 and the second bearing 72 can still provide stable support for the rotating shaft 40.

[0059] In another embodiment, the second mounting boss 51 at the upper end of the housing 50 may be provided with an opening, so that the shaft 40 extends upward from the housing 50 to output torque, and the shaft 40 extends downward from the first mounting boss 11, thereby forming a dual output shaft configuration, such as Figure 6 As shown, in this case, the first bearing 71 and the second bearing 72 can still provide stable support for the rotating shaft 40 .

[0060] The description of the embodiments herein and any reference to directions and orientations are only for the convenience of description and are not to be construed as any limitation on the scope of protection of the present invention. The description of the preferred embodiments may involve combinations of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0061] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An outer rotor motor, used for installation on electrical equipment, characterized in that: include: A base (10) formed at the lower part of the outer rotor motor; A stator assembly (20) is arranged on the base (10); A rotor assembly (30) is sleeved outside the stator assembly (20) and is used to be driven to rotate by the stator assembly (20); A rotating shaft (40) connected to the rotor assembly (30) and supporting the rotating shaft (40) and the rotor assembly (30) on the base (10) via a bearing group so as to rotate synchronously; A housing (50) is disposed on the upper portion of the base (10) and cooperates with the base (10) to cover the stator assembly (20) and the rotor assembly (30); A first mounting boss (11) is formed at the lower end of the base (10), and a second mounting boss (51) is formed at the upper end of the shell (50), so as to be suitable for symmetrically mounting the motor on the mounting structure of the electrical equipment through the first mounting boss (11) and the second mounting boss (51).

2. The outer rotor motor according to claim 1, characterized in that: It also comprises a first washer (61) and a second washer (62), wherein the first washer (61) and the second washer (62) are respectively sleeved on the outside of the first mounting boss (11) and the second mounting boss (51).

3. The outer rotor motor according to claim 1, characterized in that: The base (10) comprises a bottom plate (12), a step is formed between the inner edge of the bottom plate (12) and the inner wall of the first mounting boss (11), the bearing group comprises a first bearing (71) and a second bearing (72), the first bearing (71) is arranged on the inner wall of the first mounting boss (11) near the step.

4. The outer rotor motor according to claim 3, characterized in that: The inner edge of the bottom plate (12) is formed with a stator body (13) extending upwards. The stator body (13) is in the shape of a hollow cylinder. A second bearing (72) is arranged on the upper part of the stator body (13).

5. The outer rotor motor according to claim 4, characterized in that: The stator assembly (20) is arranged at the outer edge of the stator body (13) and extends upward from the stator body (13) for a distance, and is used to support the second bearing (72) together with the stator body (13).

6. The outer rotor motor according to claim 1, characterized in that: The base (10) comprises a bottom plate (12), the outer edge of the bottom plate (12) forms a flange (14), the shell (50) is snap-fitted onto the surface of the bottom plate (12) and is connected to the outer wall of the flange (14) by interference fit.

7. The outer rotor motor according to claim 6, characterized in that: It also includes a circuit board (80) and a wiring port, wherein the circuit board (80) and the wiring port are both arranged on the base plate (12), and the circuit board (80) is covered by the shell (50), and the wiring port is arranged outside the shell (50), wherein the flange (14) is provided with a through hole, and the circuit board (80) and the wiring port are connected via the through hole.

8. The outer rotor motor according to claim 1, characterized in that: The rotor (30) comprises a rotor shell (32), the rotor shell (32) surrounds the stator assembly (20) and forms a surrounding center hole, and the end of the rotating shaft (40) is connected to the surrounding center hole.

9. The outer rotor motor according to claim 2, characterized in that: The second mounting boss (50) is formed with a high truncated cone (511) and a flat truncated cone (512); the high truncated cone (511) is used for mounting the motor on the mounting structure of the electrical equipment, and the flat truncated cone (512) is used for precise shaping of the second mounting boss (50).

10. The outer rotor motor according to claim 9, characterized in that: The second washer (62) is formed with a high washer portion (621) and a flat washer portion (622), and the high washer portion (621) and the flat washer portion (622) are respectively sleeved on the outside of the high truncated cone (511) and the flat truncated cone (512).

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