External rotor motor using shaft sleeve to fix main control circuit board

Abstract

The utility model provides an external rotor motor using a shaft sleeve to fix a main control circuit board, comprising an external rotor, a stator assembly, a motor bearing and a main control circuit board, the external rotor and the stator assembly are successively sleeved outside the motor bearing from top to bottom, the external rotor is fixedly connected with the motor bearing, and the shaft sleeve is arranged outside the motor bearing. The stator assembly is movably connected with the motor bearing through the shaft sleeve, a main control board positioning groove is formed in the side face of the bottom of the shaft sleeve, one end of the main control circuit board is buckled and fixed in the main control board positioning groove, and the other end of the main control circuit board is fixedly arranged between the motor bearing and the outer rotor. The main control board positioning groove can position the main control circuit board without displacement when the outer rotor motor operates. The external rotor motor has the beneficial effects that the main control circuit board is firmly fixed, the structure is simple and stable, and the service life of the external rotor motor is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an outer rotor motor that utilizes a shaft sleeve to fix a main control circuit board. Background Art

[0002] At present, electric motors are widely used in various products as the main power source. The working principle of the motor is mainly to use electrical energy to make the stator covered with coils generate an electromagnetic field, and then drive the magnetic rotor to rotate.

[0003] Generally speaking, the outer rotor motor structure uses plastic clips or screws to fix the main control circuit board inside the outer rotor motor. This fixing method is relatively simple. If the stator core and the Hall main control circuit board are offset by a certain angle, the main control circuit board and the three-phase motor winding will deviate, causing the outer rotor motor to not operate in the best state, causing the outer rotor motor to be out of control for a long time, and easily causing the outer rotor motor or the main control circuit board to burn out; and the outer rotor motor with this structure has a low winding slot full rate, which is not efficient for the motor operation. Utility Model Content

[0004] In order to solve the problems in the prior art, the utility model provides an outer rotor motor which uses a shaft sleeve to fix a main control circuit board. By arranging an outer rotor, a stator assembly, a motor bearing and a main control circuit board that cooperate with each other in the outer rotor motor, the main control board positioning groove can position the main control circuit board so that it does not move when the outer rotor motor is running. The main control circuit board is firmly fixed, the structure is simple and stable, and the service life of the outer rotor motor is greatly extended. The problem that the outer rotor motor in the prior art uses plastic clips or screws to fix the main control circuit board, which has an unstable structure, is easy to burn and has low operating efficiency, is solved.

[0005] The utility model provides an outer rotor motor that utilizes a sleeve to fix a main control circuit board, comprising an outer rotor, a stator assembly, a motor bearing and a main control circuit board, wherein the outer rotor and the stator assembly are sequentially sleeved outside the motor bearing from top to bottom, the outer rotor is fixedly connected to the motor bearing, a sleeve is provided outside the motor bearing, the stator assembly is movably connected to the motor bearing through the sleeve, a main control board positioning groove is provided on the side surface at the bottom of the sleeve, one end of the main control circuit board is snap-fastened in the main control board positioning groove, the other end of the main control circuit board is fixedly arranged between the motor bearing and the outer rotor, and the main control board positioning groove can position the main control circuit board so that it does not move when the outer rotor motor is running.

[0006] The utility model is further improved and further comprises a base, the base is movably sleeved outside the motor bearing, the base is provided with a main control board support frame, and the main control board support frame is fixedly connected to the main control circuit board.

[0007] The utility model is further improved in that a base positioning groove is further provided at the bottom of the shaft sleeve, and the top of the base is fixedly clamped in the base positioning groove.

[0008] The utility model is further improved, the stator assembly includes a stator bracket and a stator core, the stator bracket is fixedly sleeved outside the motor bearing, the stator bracket is fixedly connected to the stator core, and the stator core cooperates with the outer rotor.

[0009] The utility model is further improved in that the top of the shaft sleeve is further provided with an iron core positioning groove, and the bottom side surface of the stator iron core is fixedly clamped in the iron core positioning groove.

[0010] The utility model is further improved, the stator core, the shaft sleeve, the main control circuit board, and the base are arranged from top to bottom, and the connection between the stator core and the shaft sleeve, the connection between the main control circuit board and the shaft sleeve, and the connection between the base and the shaft sleeve are on a straight line.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides an outer rotor motor that uses a shaft sleeve to fix the main control circuit board. By arranging mutually matching outer rotor, stator assembly, motor bearing and main control circuit board in the outer rotor motor, the main control board positioning groove can position the main control circuit board so that it does not move when the outer rotor motor is running. The stator core, the main control circuit board and the base are fixed by the shaft sleeve. The four are on the same line, which greatly improves the stator slot full rate of the outer rotor motor. The main control circuit board is firmly fixed, and the outer rotor motor will not be abnormal due to the deflection of the stator core. The whole machine is fully positioned, the structure is simple and stable, and the service life of the outer rotor motor is greatly extended. The problem that the outer rotor motor in the prior art uses plastic clips or screws to fix the main control circuit board, which is unstable in structure, easy to burn and has low operating efficiency, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a cross-sectional structural diagram of an outer rotor motor of the utility model that uses a shaft sleeve to fix the main control circuit board.

[0014] In the figure, 1-outer rotor, 2-stator assembly, 21-stator bracket, 22-stator core, 3-motor bearing, 4-main control circuit board, 5-shaft sleeve, 51-main control board positioning groove, 52-base positioning groove, 53-core positioning groove, 6-base, 61-main control board support frame. DETAILED DESCRIPTION

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of this application; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit the application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0016] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0017] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, the utility model provides an outer rotor motor that uses a sleeve to fix the main control circuit board, including an outer rotor 1, a stator assembly 2, a motor bearing 3 and a main control circuit board 4. The outer rotor 1 and the stator assembly 2 are sequentially sleeved outside the motor bearing 3 from top to bottom, the outer rotor 1 is fixedly connected to the motor bearing 3, a sleeve 5 is arranged outside the motor bearing 3, the stator assembly 2 is movably connected to the motor bearing 3 through the sleeve 5, a main control board positioning groove 51 is arranged on the bottom side of the sleeve 5, one end of the main control circuit board 4 is snap-fastened in the main control board positioning groove 51, and the other end of the main control circuit board 4 is fixedly arranged between the motor bearing 3 and the outer rotor 1. In this embodiment, the main control board positioning groove can position the main control circuit board so that it does not move when the outer rotor motor is running, and the stator core, the main control circuit board and the base are fixed by the sleeve, and the four are on the same line, which greatly improves the stator slot full rate of the outer rotor motor, the main control circuit board is firmly fixed, and the outer rotor motor will not be abnormal due to the deflection of the stator core. The whole machine realizes complete positioning, the structure is simple and stable, and the service life of the outer rotor motor is greatly extended.

[0019] like Figure 1As shown, it also includes a base 6, which is movably sleeved outside the motor bearing 3, and the base 6 is provided with a main control board support frame 61, and the main control board support frame 61 is fixedly connected to the main control circuit board 4; the bottom of the sleeve 5 is also provided with a base positioning groove 52, and the top of the base 6 is fixedly clamped in the base positioning groove 52; the stator assembly 2 includes a stator bracket 21 and a stator core 22, the stator bracket 21 is fixedly sleeved outside the motor bearing 3, the stator bracket 21 is fixedly connected to the stator core 22, and the stator core 22 cooperates with the outer rotor 1; the top of the sleeve 5 is also provided with a core positioning groove 53, and the bottom side of the stator core 22 is fixedly clamped in the core positioning groove 53; the stator core 22, the sleeve 5, the main control circuit board 4, and the base 6 are arranged from top to bottom, and the junction between the stator core 22 and the sleeve 5, the junction between the main control circuit board 4 and the sleeve 5, and the junction between the base 6 and the sleeve 5 are in a straight line. In this embodiment, by arranging the main control board positioning groove, the base positioning groove and the iron core positioning groove on the shaft sleeve, the stator iron core, the main control circuit board and the base can be firmly fixed without the need for plastic clips or screws. The structure is more stable, the cost is lower, the slot fill rate is higher, and the overall service life is longer.

[0020] From the above, it can be seen that the utility model provides an outer rotor motor that uses a shaft sleeve to fix the main control circuit board. By arranging mutually matching outer rotor, stator assembly, motor bearing and main control circuit board in the outer rotor motor, the main control board positioning groove can position the main control circuit board so that it does not move when the outer rotor motor is running. The stator core, the main control circuit board and the base are fixed by the shaft sleeve. The four are on the same line, which greatly improves the stator slot full rate of the outer rotor motor. The main control circuit board is firmly fixed and will not cause abnormalities of the outer rotor motor due to the deflection of the stator core. The whole machine is fully positioned, the structure is simple and stable, and the service life of the outer rotor motor is greatly extended. The problem that the outer rotor motor in the prior art uses plastic clips or screws to fix the main control circuit board, which is unstable in structure, easy to burn and has low operating efficiency, is solved.

[0021] The specific implementation methods described above are preferred implementation methods of the present utility model, and are not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation methods. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. An outer rotor motor using a sleeve to fix a main control circuit board, characterized in that: It includes an outer rotor, a stator assembly, a motor bearing and a main control circuit board. The outer rotor and the stator assembly are sequentially sleeved on the outside of the motor bearing from top to bottom. The outer rotor is fixedly connected to the motor bearing. A shaft sleeve is arranged outside the motor bearing. The stator assembly is movably connected to the motor bearing through the shaft sleeve. A main control board positioning groove is arranged on the bottom side of the shaft sleeve. One end of the main control circuit board is snap-fastened in the main control board positioning groove. The other end of the main control circuit board is fixedly arranged between the motor bearing and the outer rotor. The main control board positioning groove can position the main control circuit board so that it does not move when the outer rotor motor is running.

2. The outer rotor motor with a main control circuit board fixed by a sleeve according to claim 1, characterized in that: It also includes a base, which is movably sleeved outside the motor bearing. The base is provided with a main control board support frame, and the main control board support frame is fixedly connected to the main control circuit board.

3. The outer rotor motor with a main control circuit board fixed by a shaft sleeve according to claim 2 is characterized in that: The bottom of the shaft sleeve is also provided with a base positioning groove, and the top of the base is fixedly clamped in the base positioning groove.

4. The outer rotor motor with a main control circuit board fixed by a shaft sleeve according to claim 3 is characterized in that: The stator assembly comprises a stator bracket and a stator core. The stator bracket is fixedly sleeved outside the motor bearing. The stator bracket is fixedly connected to the stator core. The stator core cooperates with the outer rotor.

5. The outer rotor motor with a main control circuit board fixed by a shaft sleeve according to claim 4 is characterized in that: An iron core positioning groove is also provided on the top of the shaft sleeve, and the bottom side surface of the stator iron core is fixedly clamped in the iron core positioning groove.

6. The outer rotor motor with a main control circuit board fixed by a shaft sleeve according to claim 5, characterized in that: The stator core, the shaft sleeve, the main control circuit board and the base are arranged from top to bottom, and the connection between the stator core and the shaft sleeve, the connection between the main control circuit board and the shaft sleeve, and the connection between the base and the shaft sleeve are on a straight line.

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