External rotor motor

Abstract

The utility model discloses an external rotor motor, which comprises a motor single machine and a controller, the motor single machine comprises a stator assembly, a rotor assembly, a rotating shaft and a bearing seat, the bearing seat comprises an end plate and a sleeve protruding from the middle of the inner side surface of the end plate, the stator assembly is sleeved outside the sleeve, the rotor assembly is sleeved outside the stator assembly, and the controller is connected with the motor single machine. The rotating shaft is connected with the rotor assembly, the controller is installed on the end plate, the controller comprises a control box with a closed cavity and a respirator, a through hole is formed in the control box, and the respirator is installed on the control box by being matched with the through hole. According to the embodiment of the invention, the respirator is arranged on the control box, so that air pressure inside and outside the controller can be consistent, external moisture is blocked, condensate water can be prevented from being generated in the controller, and the technical problems of short circuit and burn-in of elements on the control panel caused by the condensate water are solved.

Description

Technical Field

[0001] The utility model relates to an outer rotor motor. Background Art

[0002] like Figure 1 As shown, the existing external rotor motor includes a motor unit 1a and a controller 2a. The motor unit 1a includes a stator assembly 11a, a rotor assembly 12a, a rotating shaft 13a and a bearing seat 14a. The bearing seat 14a includes an end plate 141a and a sleeve 142a protruding from the middle of the end plate 141a. The stator assembly 11a is sleeved outside the sleeve 142a, and the rotor assembly 12a is sleeved outside the stator assembly 11a. The rotating shaft 13a is connected to the rotor assembly 12a. A bearing is installed in the sleeve 142a, and the bearing supports the rotating shaft 13a. The controller 2a is installed on the end plate 141a. The inner cavity of the controller 2a is connected to the bearing seat 14a, and the control board is arranged at the bottom of the inner cavity of the controller 2a. The generated condensed water and the water vapor outside the motor enter the inner cavity of the controller 2a and condense on the control board, and the components on the control board will short-circuit and burn out. Utility Model Content

[0003] The utility model provides an outer rotor motor, which is used to solve the technical problem in the prior art that condensed water generated by the outer rotor motor and water vapor outside the motor enter the inner cavity of the controller and condense on the control board, causing short circuit and burnout of components on the control board.

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

[0005] The purpose of the utility model is to provide an external rotor motor, including a motor unit and a controller, wherein the motor unit includes a stator assembly, a rotor assembly, a rotating shaft and a bearing seat, wherein the bearing seat includes an end plate and a sleeve protruding from the middle of the inner side surface of the end plate, the stator assembly is sleeved outside the sleeve, the rotor assembly is sleeved outside the stator assembly, the rotating shaft is connected to the rotor assembly, the controller is mounted on the end plate, the controller includes a control box with a closed cavity and a respirator, a through hole is provided on the control box, and the respirator is mounted on the control box by cooperating with the through hole.

[0006] The above-mentioned control box includes a bottom, a cylinder and an end cover. The bottom and the end cover are respectively arranged at the two ends of the cylinder. The bottom and the cylinder are an integrated structure. The end cover is installed at one end of the cylinder. The through hole is arranged on the end cover, and the respirator is installed on the end cover by cooperating with the through hole.

[0007] An outer ring and an inner ring are protruded from the outer edge of the inner side surface of the end cover, and an annular groove cooperating with the cylinder is formed between the outer ring and the inner ring, and the heights of the inner rings are unequal.

[0008] The outer side surface of the end cover is provided with a lead wire mark.

[0009] The lead wire mark described above is a boss mark.

[0010] The outer side surface of the end cover is provided with a clamping boss.

[0011] The outer edge of the end of one end of the barrel portion that cooperates with the end cover is provided with reinforcing ribs.

[0012] A water drain port is provided at the top end of the sleeve.

[0013] Two drainage openings are symmetrically arranged at the top of the sleeve.

[0014] A plurality of countersunk holes are provided on the outer side surface of the end plate and at positions close to corresponding positions of the sleeve.

[0015] A plurality of heat dissipation ribs and motor mounting positions are respectively provided on the inner and outer side surfaces of the end plate, and the heat dissipation ribs and motor mounting positions are distributed along the outer circumference of the end plate, and the outer end edge of the end plate protrudes from the outer end surface of the motor mounting position and the outer end of the heat dissipation ribs.

[0016] The bottom of the controller described above is protruded with a plurality of controller mounting positions, and the controller is mounted on the end plate by matching the controller mounting positions with the motor mounting positions, and the heat dissipation ribs and the control box are not in contact.

[0017] The above-mentioned controller also includes a wire protection cover assembly, which includes a seal and a cover. The seal is provided with a wire lead hole and a recess. The bottom of the controller is provided with a wire passing hole. The outer periphery of the wire passing hole protrudes an annular boss. The cover is installed in the wire passing hole. The seal is installed in cooperation with the annular boss through the recess and presses the cover.

[0018] The above-mentioned recessed portion cooperates with the annular boss to form a water retaining labyrinth.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1. An external rotor motor, including a motor unit and a controller, the motor unit including a stator assembly, a rotor assembly, a rotating shaft and a bearing seat, the bearing seat including an end plate and a sleeve protruding from the middle of the inner side of the end plate, the stator assembly is sleeved outside the sleeve, the rotor assembly is sleeved outside the stator assembly, the rotating shaft is connected to the rotor assembly, the controller is mounted on the end plate, the controller includes a control box with a closed cavity and a respirator, a through hole is provided on the control box, and the respirator is mounted on the control box by matching with the through hole. In the embodiment of the present application, the respirator is arranged on the control box to make the air pressure inside and outside the controller consistent, which not only blocks the external moisture, but also prevents the generation of condensed water inside the controller, and solves the technical problem of short circuit and burnout of components on the control board due to condensed water.

[0021] 2. Other advantages of the present invention are described in detail in the embodiment section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of an outer rotor motor provided by the prior art;

[0023] Figure 2 A three-dimensional diagram of an outer rotor motor provided by an embodiment of the utility model;

[0024] Figure 3 An exploded view of an outer rotor motor provided in an embodiment of the utility model;

[0025] Figure 4 A front view of an outer rotor motor provided by an embodiment of the utility model;

[0026] Figure 5 for Figure 4 AA section view;

[0027] Figure 6 An exploded diagram of a controller 2 provided in an embodiment of the utility model;

[0028] Figure 7 An exploded view of the controller 2 provided in another embodiment of the utility model;

[0029] Figure 8 An exploded view of a motor unit 1 provided in an embodiment of the utility model;

[0030] Fig. 9 An exploded view of the motor unit 1 provided in another embodiment of the utility model from another angle;

[0031] Fig.10 A schematic diagram of an outer rotor motor provided in an embodiment of the utility model;

[0032] Fig.11 for Fig.10 A partial enlarged view of B. DETAILED DESCRIPTION

[0033] 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.

[0034] Example:

[0035] like Figures 2 to 9As shown, the present embodiment provides an outer rotor motor, including a motor unit 1 and a controller 2, wherein the motor unit 1 includes a stator assembly 11, a rotor assembly 12, a rotating shaft 13 and a bearing seat 14, wherein the bearing seat 14 includes an end plate 141 and a sleeve 142 protruding from the middle of the inner side of the end plate 141, wherein the stator assembly 11 is sleeved outside the sleeve 142, wherein the rotor assembly 12 is sleeved outside the stator assembly 11, wherein the rotating shaft 13 is connected to the rotor assembly 12, wherein the controller 2 is mounted on the end plate 141, wherein the controller 2 includes a control box 21 with a closed cavity 22 and a respirator 23, wherein a through hole 24 is provided on the control box 21, wherein the respirator 23 is mounted on the control box 21 by cooperating with the through hole 24. The respirator 23 can make the air pressure inside and outside the controller 2 consistent, thereby blocking the external moisture and preventing the generation of condensed water inside the controller 2, thereby solving the technical problem of short circuit and burnout of components on the control board due to condensed water.

[0036] like Figure 6 and Figure 7 As shown, preferably, the control box 21 includes a bottom 211, a barrel 212 and an end cover 213, the bottom 211 and the end cover 213 are respectively arranged at the two ends of the barrel 212, the bottom 211 and the barrel 212 are an integrated structure, the end cover 213 is installed at one end of the barrel 212, the through hole 24 is arranged on the end cover 213, and the respirator 23 is installed on the end cover 213 by cooperating with the through hole 24, which facilitates the installation of the respirator 23.

[0037] like Figure 7 As shown, specifically, an outer edge of the inner side surface of the end cover 213 protrudes with an outer ring 2131 and an inner ring 2132, and an annular groove matching the barrel 212 is formed between the outer ring 2131 and the inner ring 2132. The heights of the inner ring 2132 are unequal, so that the inner ring 2132 can be set to a relatively high point at a position where there are no components in the corresponding control box 21, and set to a relatively low point at a position where there are components, which is convenient for assembly and can prevent mistakes.

[0038] like Figure 8 As shown, specifically, a lead-out line mark 2133 is provided on the outer side of the end cover 213. The lead-out line mark 2133 is preferably set as a boss mark, or the lead-out line mark 2133 can be set as a recessed mark. The purpose of such setting is to facilitate visual positioning during installation by employees.

[0039] Specifically, a clamping boss 2134 is provided on the outer side surface of the end cover 213 for clamping and positioning during machining.

[0040] Specifically, a reinforcing rib 2121 is provided at the outer edge of the end of the barrel 212 where the barrel 212 and the end cover 213 cooperate, which can not only ensure the sealing area of ​​the barrel 212 and the end cover 213 but also improve the strength of the controller 2.

[0041] Specifically, a drainage port 1421 is provided at the top of the sleeve 142 to prevent condensed water from gathering on the bearing and then flowing into the bearing to corrode the bearing. Preferably, two drainage ports 1421 are symmetrically provided at the top of the sleeve 142 to achieve better drainage effect.

[0042] like Figure 8 and Fig. 9 As shown, specifically, a plurality of countersunk holes 1411 are provided on the outer surface of the end plate 141 and close to the corresponding position of the sleeve 142. When the temperature of the motor 1 and the controller 2 rises, the countersunk holes 1411 can be converted into through holes to facilitate water inlet and heat dissipation.

[0043] Specifically, a plurality of heat dissipation ribs 143 and motor mounting positions 144 are respectively provided on the inner side and outer side of the end plate 141, and the heat dissipation ribs 143 and motor mounting positions 144 are distributed along the outer circumference of the end plate 141. The outer end edge 1412 of the end plate 141 protrudes from the outer end surface 1441 of the motor mounting position 144 and the outer end 1431 of the heat dissipation ribs 143. This arrangement is convenient for cleaning the burrs of the die casting, and can avoid damaging the clamping and positioning surface, thereby ensuring the accuracy of the clamping and positioning of the bearing seat (14). Preferably, four motor mounting positions 144 are respectively provided on the inner side and outer side of the end plate 141.

[0044] Specifically, the bottom 211 of the controller 2 protrudes with a plurality of controller mounting positions 2111, preferably four controller mounting positions 2111 are set on the bottom 211 of the controller 2, and the controller 2 is mounted on the end plate 141 through the controller mounting positions 2111 matching the motor mounting positions 144. Preferably, the controller 2 is mounted on the end plate 141 by screws or bolts in cooperation with the controller mounting positions 2111 and the motor mounting positions 144, and the heat dissipation ribs 143 are not in contact with the control box 21. This arrangement can prevent the heat generated by the motor unit 1 from being transferred to the controller 2 through heat conduction, thereby increasing the life of the controller 2.

[0045] like Fig.10 and Fig.11 As shown, specifically, the controller 2 further includes a wire protection sleeve assembly 25, which includes a seal 251 and a sleeve 252. The seal 251 is provided with a lead hole 2511 and a recess 2512. The bottom 211 of the controller 2 is provided with a wire passing hole, and an annular boss 2112 protrudes from the periphery of the wire passing hole. The sleeve 252 is installed in the wire passing hole, and the seal 251 is installed in cooperation with the annular boss 2112 through the recess 2512 and presses the sleeve 252. The motor lead wire is connected to the control board of the controller 2 by passing through the lead hole 2511 and the sleeve 252 of the seal 251. The motor lead wire passes through the end plate 141 of the bearing seat 14, passes through the lead hole 2511 and the sleeve 252, enters the control box and is connected to the control board.

[0046] Specifically, the recess 2512 cooperates with the annular boss 2112 to form a water-blocking maze to prevent external water from entering the controller.

[0047] 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. An external rotor motor, comprising a motor unit (1) and a controller (2), wherein the motor unit (1) comprises a stator assembly (11), a rotor assembly (12), a rotating shaft (13) and a bearing seat (14), wherein the bearing seat (14) comprises an end plate (141) and a sleeve (142) protruding from the middle of the inner side surface of the end plate (141), the stator assembly (11) is sleeved outside the sleeve (142), the rotor assembly (12) is sleeved outside the stator assembly (11), the rotating shaft (13) is connected to the rotor assembly (12), and the controller (2) is mounted on the end plate (141), characterized in that: The controller (2) comprises a control box (21) with a closed cavity (22) and a respirator (23); a through hole (24) is provided on the control box (21); and the respirator (23) is mounted on the control box (21) by cooperating with the through hole (24).

2. An outer rotor motor according to claim 1, characterized in that: The control box (21) comprises a bottom (211), a cylinder (212) and an end cover (213); the bottom (211) and the end cover (213) are respectively arranged at two ends of the cylinder (212); the bottom (211) and the cylinder (212) are an integrated structure; the end cover (213) is installed at one end of the cylinder (212); the through hole (24) is arranged on the end cover (213); and the respirator (23) is installed on the end cover (213) by cooperating with the through hole (24).

3. An outer rotor motor according to claim 2, characterized in that: An outer ring (2131) and an inner ring (2132) are protruded from the outer edge of the inner side surface of the end cover (213), and an annular groove matching with the barrel (212) is formed between the outer ring (2131) and the inner ring (2132), and the heights of the inner ring (2132) are unequal.

4. An outer rotor motor according to claim 2, characterized in that: A lead-out line mark (2133) is provided on the outer side surface of the end cover (213).

5. An outer rotor motor according to claim 4, characterized in that: The lead-out line mark (2133) is a boss mark.

6. The outer rotor motor according to claim 2, characterized in that: The outer side surface of the end cover (213) is provided with a clamping boss (2134).

7. The outer rotor motor according to claim 3, characterized in that: A reinforcing rib (2121) is provided at the outer edge of one end of the cylinder (212) that matches the end cover (213).

8. An outer rotor motor according to any one of claims 1 to 7, characterized in that: A drainage port (1421) is provided at the top end of the sleeve (142).

9. An outer rotor motor according to claim 8, characterized in that: Two drainage openings (1421) are symmetrically arranged at the top end of the sleeve (142).

10. An outer rotor motor according to any one of claims 1 to 7, characterized in that: A plurality of countersunk holes (1411) are provided on the outer side surface of the end plate (141) and at positions close to corresponding positions of the sleeve (142).

11. An outer rotor motor according to any one of claims 1 to 7, characterized in that: A plurality of heat dissipation ribs (143) and motor mounting positions (144) are respectively provided on the inner and outer side surfaces of the end plate (141); the heat dissipation ribs (143) and the motor mounting positions (144) are distributed along the outer circumference of the end plate (141); and the outer end edge (1412) of the end plate (141) protrudes from the outer end surface (1441) of the motor mounting position (144) and the outer end (1431) of the heat dissipation ribs (143).

12. An outer rotor motor according to claim 11, characterized in that: A plurality of controller mounting positions (2111) protrude from the bottom (211) of the controller (2), and the controller (2) is mounted on the end plate (141) by matching the controller mounting positions (2111) with the motor mounting positions (144), and the heat dissipation ribs (143) and the control box (21) are not in contact.

13. An outer rotor motor according to any one of claims 2 to 7, characterized in that: The controller (2) further comprises a wire protection sleeve assembly (25), the wire protection sleeve assembly (25) comprising a sealing member (251) and a sheath (252), the sealing member (251) being provided with a wire lead hole (2511) and a recess (2512), the bottom (211) of the controller (2) being provided with a wire lead hole, the periphery of the wire lead hole protruding with an annular boss (2112), the sheath (252) being mounted in the wire lead hole, and the sealing member (251) being mounted in cooperation with the annular boss (2112) through the recess (2512) and pressing the sheath (252).

14. An outer rotor motor according to claim 13, characterized in that: The recess (2512) cooperates with the annular boss (2112) to form a water retaining maze.

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