Stator of external rotor motor and external rotor motor applying stator

Abstract

The stator of the external rotor motor comprises a stator assembly, a control circuit board and a sleeve seat, a bearing chamber is arranged in the sleeve seat, the stator assembly is sleeved outside the sleeve seat, a through hole is arranged in the center of the control circuit board, and the bearing chamber is arranged in the through hole. The control circuit board is sleeved on the sleeve seat through the through hole and is positioned above the stator assembly, a first boss radially protrudes out of the periphery of the sleeve seat, a first screw hole is formed in the first boss, the control circuit board is supported on the first boss, and a ground wire jack / slot corresponding to the first screw hole is formed in the control circuit board; a bonding pad connected with a ground wire of the control circuit is arranged on the periphery of the ground wire jack / groove, a screw is installed on the ground wire jack / groove, the head of the screw is pressed on the bonding pad, the tail of the screw is fixed in the first screw hole, and the ground wire of the control circuit is electrically connected and conducted with the sleeve seat through the screw. The structure is simple, the installation is convenient, and the safety of the motor is improved.

Description

Technical Field

[0001] The utility model relates to a stator of an outer rotor motor and the outer rotor motor applied thereto. Background Art

[0002] The existing outer rotor motor includes an end cover, an outer rotor and a stator. The stator includes a stator assembly, a control circuit board and a sleeve seat. The stator assembly is sleeved outside the sleeve seat. A through hole is provided in the center of the control circuit board. The control circuit board is sleeved on the sleeve seat through the through hole and is located above the stator assembly. The end cover covers the outside of the control circuit board. The outer rotor is sleeved outside the stator. A bearing chamber is provided in the sleeve seat. A bearing is installed in the bearing chamber. The shaft of the outer rotor is installed in the sleeve seat through the bearing. In order to increase the safety of the motor, it is necessary to connect the ground wire of the control circuit board with the stator assembly (stator core) or the sleeve seat. This is usually achieved by using a soft wire, specifically a wire, one end of which is connected to the ground wire of the control circuit board, and the other end is fixed to the top of the sleeve seat by a screw. This structure has the following disadvantages: if the wire is too short, it is inconvenient to install and is easy to loosen. If the wire is too long, the wire will be easily affected by the electromagnetic field of the control circuit board or the outside world, which reduces the anti-electromagnetic interference ability of the motor and reduces the safety of the motor. Utility Model Content

[0003] The utility model provides a stator of an outer rotor motor and an outer rotor motor applied thereto, which are used to solve the problem of inconvenient ground connection between a control circuit board and a sleeve seat in the prior art.

[0004] The technical solution of the utility model is achieved in this way:

[0005] The first object of the utility model is to provide a stator of an outer rotor motor, comprising a stator assembly, a control circuit board and a sleeve seat, wherein a bearing chamber is arranged in the sleeve seat, the stator assembly is sleeved outside the sleeve seat, a through hole is arranged in the center of the control circuit board, the control circuit board is sleeved on the sleeve seat through the through hole and is located above the stator assembly, and is characterized in that: a first boss radially protrudes from the outer periphery of the sleeve seat, a first screw hole is arranged on the first boss, the control circuit board is supported on the first boss, the control circuit board is provided with a ground wire jack / groove arranged corresponding to the first screw hole, a soldering pad connected to the ground wire of the control circuit is arranged around the ground wire jack / groove, a screw is installed on the ground wire jack / groove, the head of the screw is pressed on the soldering pad, the tail of the screw is fixed in the first screw hole, and the ground wire of the control circuit is electrically connected and conducted with the sleeve seat through the screw.

[0006] A cylindrical insulating seat is also provided between the above-mentioned stator assembly and the sleeve seat, the top of the insulating seat extends out of the stator assembly, the top of the insulating seat is provided with a flange facing outward, and a slot is provided on the flange. The first boss of the sleeve seat is clamped in the slot, and the control circuit board is supported on the flange and the first boss.

[0007] The top of the stator assembly described above has a convex edge protruding upward at the periphery of the center hole, and a positioning groove is provided on the convex edge. A mounting cavity is formed between the convex edge and the sleeve seat, and the insulating seat is installed in the mounting cavity. A positioning block protrudes axially at the bottom of the flange of the insulating seat, the flange is supported on the convex edge, and the positioning block is stuck in the positioning groove.

[0008] The inner ring of the insulating seat is provided with a mounting platform, and the outer side of the sleeve seat is provided with a mounting step, and the mounting step is supported on the mounting platform.

[0009] A plurality of second bosses are arranged on the top of the sleeve seat, and second screw holes are arranged on the second bosses. Avoidance grooves corresponding to the second bosses are arranged next to the through holes of the control circuit board.

[0010] The number of the second bosses is three, and the ground wire jack / slot is arranged between two of the second bosses.

[0011] The stator assembly described above is provided with three winding pins, the ends of the winding pins are inserted into and welded to the control circuit board, and the winding pins and screws are located on both sides of the center hole of the stator assembly.

[0012] The second object of the utility model is to provide an outer rotor motor, comprising a stator and an outer rotor of the outer rotor motor, characterized in that the stator of the outer rotor motor is the stator of the outer rotor motor described above.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The stator of the outer rotor motor comprises a stator assembly, a control circuit board and a sleeve seat, wherein a bearing chamber is arranged in the sleeve seat, the stator assembly is sleeved outside the sleeve seat, a through hole is arranged in the center of the control circuit board, the control circuit board is sleeved on the sleeve seat through the through hole and is located above the stator assembly, and the characteristics are as follows: a first boss protrudes radially from the outer periphery of the sleeve seat, a first screw hole is arranged on the first boss, the control circuit board is supported on the first boss, the control circuit board is provided with a ground wire jack / slot arranged corresponding to the first screw hole, a pad connected to the ground wire of the control circuit is arranged around the ground wire jack / slot, a screw is installed on the ground wire jack / slot, the head of the screw is pressed on the pad, the tail of the screw is fixed in the first screw hole, and the ground wire of the control circuit is electrically connected and conducted with the sleeve seat through the screw. The ground wire of the control circuit board is directly connected with the sleeve seat by the screw, the structure is simple, the installation is convenient, the soft wire is prevented from being affected by the electromagnetic field of the control circuit board circuit or the outside world, and the safety of the motor is improved.

[0015] 2. Other advantages of the present invention are described in detail in the embodiment section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of the stator of the outer rotor motor provided in the first embodiment of the utility model;

[0017] Figure 2 A top view of a stator of an external rotor motor;

[0018] Figure 3 for Figure 2 AA cross-sectional view of

[0019] Figure 4 for Figure 3 The enlarged view of point B;

[0020] Figure 5 This is an exploded view of the stator of an external rotor motor;

[0021] Figure 6 It is a structural schematic diagram of a stator assembly in a stator of an outer rotor motor;

[0022] Figure 7 It is a structural schematic diagram of a control circuit board in the stator of an outer rotor motor;

[0023] Figure 8 It is a structural schematic diagram of a sleeve seat in the stator of an external rotor motor;

[0024] Fig. 9 It is a schematic diagram of the structure of the insulating seat in the stator of the outer rotor motor. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1:

[0027] like Figures 1 to 9As shown, the present embodiment provides a stator of an outer rotor motor, comprising a stator assembly 1, a control circuit board 2 and a sleeve seat 3, wherein a bearing chamber 31 is provided in the sleeve seat 3, the stator assembly 1 is sleeved outside the sleeve seat 3, a through hole 21 is provided in the center of the control circuit board 2, the control circuit board 2 is sleeved on the sleeve seat 3 through the through hole 21 and is located above the stator assembly 1, characterized in that: a first boss 32 radially protrudes from the outer periphery of the sleeve seat 3, a first screw hole 33 is provided on the first boss 32, the control circuit board 2 is supported on the first boss 32, the control circuit board 2 is provided with a ground wire jack / slot 22 corresponding to the first screw hole 33, a soldering pad 23 connected to the ground wire of the control circuit is provided around the ground wire jack / slot 22, a screw 4 is installed on the ground wire jack / slot 22, the head of the screw 4 is pressed on the soldering pad 23, the tail of the screw 4 is fixed in the first screw hole 33, and the ground wire of the control circuit is electrically connected to the sleeve seat 3 through the screw 4.

[0028] The stator of the outer rotor motor is directly connected to the ground wire of the control circuit board 2 and the sleeve seat 3 through a screw 4, which has a simple structure, convenient installation, reliable connection, avoids the soft wire from being affected by the electromagnetic influence of the control circuit board circuit or the outside world, and improves the safety of the motor.

[0029] The screw 4 is a copper screw.

[0030] A cylindrical insulating seat 5 is further provided between the stator assembly 1 and the sleeve seat 3. The top of the insulating seat 5 extends out of the stator assembly 1. The top of the insulating seat 5 is provided with a flange 51 outwardly, and a clamping groove 52 is provided on the flange 51. The first boss 32 of the sleeve seat 3 is clamped in the clamping groove 52, and the control circuit board 2 is supported on the flange 51 and the first boss 32. The insulating seat 5 increases the insulation between the circuit of the control circuit board 2 and the stator core, and between the circuit and the sleeve seat 5, to prevent the control circuit from short-circuiting. The flange 51 better supports the control circuit board 2, and the clamping groove 52 cooperates with the first boss 32 to circumferentially position the sleeve seat 3, making the structure of the entire stator more stable.

[0031] The top of the stator assembly 1 has a convex edge 12 protruding upwards from the periphery of the center hole 11, and a positioning groove 13 is provided on the convex edge 12. A mounting cavity 14 is formed between the convex edge 12 and the sleeve seat 3. The insulating seat 5 is mounted in the mounting cavity 14. A positioning block 53 protrudes axially from the bottom of the flange 51 of the insulating seat 5. The flange 51 is supported on the convex edge 12, and the positioning block 53 is stuck in the positioning groove 13. The positioning block 53 cooperates with the positioning groove 13 to fix the insulating seat 5 circumferentially.

[0032] The inner circle of the insulating seat 5 is provided with a mounting platform 54, and the outer side of the sleeve seat 3 is provided with a mounting step 36, which is supported on the mounting platform 54. The cooperation between the mounting platform 54 and the mounting step 36 makes the installation between the sleeve seat 3 and the insulating seat 5 more compact and stable.

[0033] The top of the sleeve seat 3 is provided with a plurality of second bosses 34, on which second screw holes 35 are provided, and beside the through hole 21 of the control circuit board 2 there are avoidance grooves 24 corresponding to the second bosses 34. The second bosses 34 are used to fix the end cover.

[0034] The number of the second bosses 34 is three, and the ground wire jack / slot 22 is disposed between two of the second bosses 34 .

[0035] The stator assembly 1 is provided with three winding pins 15, the ends of the winding pins 15 are inserted into and welded to the control circuit board 2, and the winding pins 15 and the screws 4 are located on both sides of the center hole of the stator assembly 1. The fixation of the control circuit board 2 is enhanced, and the control circuit board 2 can be reduced. Abnormal conditions such as unevenness and shaking after installation can be reduced, and the reliability of the motor is further enhanced.

[0036] Embodiment 2:

[0037] The second object of the utility model is to provide an outer rotor motor, comprising an outer rotor motor stator 100 and an outer rotor, characterized in that: the outer rotor motor stator 100 is the stator of the outer rotor motor described in Example 1. By improving the structure of the outer rotor motor stator 100, the ground connection of the control circuit board 2 is more convenient, the anti-electromagnetic interference performance of the motor is stronger, and the safety of the motor is higher.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A stator of an outer rotor motor, comprising a stator assembly (1), a control circuit board (2) and a sleeve seat (3), wherein a bearing chamber (31) is provided in the sleeve seat (3), the stator assembly (1) is sleeved outside the sleeve seat (3), a through hole (21) is provided in the center of the control circuit board (2), the control circuit board (2) is sleeved on the sleeve seat (3) through the through hole (21) and is located above the stator assembly (1), characterized in that: A first boss (32) protrudes radially from the outer periphery of the sleeve seat (3), and a first screw hole (33) is provided on the first boss (32). The control circuit board (2) is supported on the first boss (32), and the control circuit board (2) is provided with a ground wire jack / slot (22) corresponding to the first screw hole (33). A soldering pad (23) connected to the ground wire of the control circuit is provided around the ground wire jack / slot (22). A screw (4) is installed on the ground wire jack / slot (22), and the head of the screw (4) is pressed on the soldering pad (23). The tail of the screw (4) is fixed in the first screw hole (33), and the ground wire of the control circuit is electrically connected to the sleeve seat (3) through the screw (4).

2. The stator of an outer rotor motor according to claim 1, characterized in that: A cylindrical insulating seat (5) is also provided between the stator assembly (1) and the sleeve seat (3); the top of the insulating seat (5) extends outward from the stator assembly (1); a flange (51) is provided outwardly at the top of the insulating seat (5); a clamping groove (52) is provided on the flange (51); a first boss (32) of the sleeve seat (3) is clamped in the clamping groove (52); and the control circuit board (2) is supported on the flange (51) and the first boss (32).

3. The stator of an outer rotor motor according to claim 2, characterized in that: The top of the stator assembly (1) is provided with a convex edge (12) protruding upwards on the periphery of the central hole (11); a positioning groove (13) is provided on the convex edge (12); a mounting cavity (14) is formed between the convex edge (12) and the sleeve seat (3); the insulating seat (5) is mounted in the mounting cavity (14); a positioning block (53) protrudes axially from the bottom of the flange (51) of the insulating seat (5); the flange (51) is supported on the convex edge (12); and the positioning block (53) is stuck in the positioning groove (13).

4. The stator of an outer rotor motor according to claim 3, characterized in that: The inner ring of the insulating seat (5) is provided with a mounting platform (54), and the outer side of the sleeve seat (3) is provided with a mounting step (36), and the mounting step (36) is supported on the mounting platform (54).

5. The stator of an outer rotor motor according to any one of claims 1 to 4, characterized in that: A plurality of second bosses (34) are provided on the top of the sleeve seat (3), and second screw holes (35) are provided on the second bosses (34). A avoidance groove (24) corresponding to the second bosses (34) is provided next to the through hole (21) of the control circuit board (2).

6. The stator of an outer rotor motor according to claim 5, characterized in that: The number of the second bosses (34) is three, and the ground wire jack / slot (22) is arranged between two of the second bosses (34).

7. The stator of an outer rotor motor according to claim 6, characterized in that: The stator assembly (1) is provided with three winding pins (15), the ends of the winding pins (15) are inserted into and welded to the control circuit board (2), and the winding pins (15) and the screws (4) are located on both sides of the central hole of the stator assembly (1).

8. An outer rotor motor, comprising a stator (100) and an outer rotor of the outer rotor motor, characterized in that: The stator (100) of the outer rotor motor is the stator of the outer rotor motor according to any one of claims 1 to 7.

Images