Outer rotor motor and fan

Abstract

The utility model relates to the technical field of fans, in particular to an external rotor motor and a fan. The outer rotor motor comprises a base body, an injection molding stator and an electric control board, the injection molding stator is installed on the base body and comprises an iron core and a coil wound around the iron core, and an outgoing line of the coil is connected with a contact pin. A mounting groove is formed in one axial end of the base body, a locking column is arranged in the mounting groove, and the contact pin penetrates out of the base body and extends into the mounting groove; the electric control board is installed in the installation groove and arranged on the locking column in a sleeved mode, and the contact pin is connected with the electric control board in a welded mode. The fan comprises the external rotor motor, the mounting plate is limited through the locking columns and the inserting pins, a buckle structure does not need to be arranged on the base body, the risk that the electric control plate fails to be mounted due to buckle breakage is avoided, and stable mounting of the mounting plate in the base body is achieved. And meanwhile, the locking columns and the contact pins do not cause damage to electrical components on the electric control board, so that the safety of the electric control board is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field especially relates to a kind of outer rotor motor and fan. BACKGROUND

[0002] The existing outer rotor motor, such as the outer rotor motor disclosed in the patent with application No. CN202122085081.8, adopts a base (insulation frame) to package the motor stator, and the base is provided with a buckle structure of clamping and buckling. The control board is installed on the base through the buckle structure. However, the outer rotor motor has the following problems:

[0003] 1) The base uses a buckle structure to limit the control board. Since the protruding part (buckle head or barb) of the buckle is prone to breakage during installation, it can cause the control board to fail to install and has low reliability.

[0004] 2) The protruding part of the buckle abuts against the upper surface of the control board to press and fix the control board on the base, which can easily damage the electrical elements of the control board. INVENTION CONTENTS

[0005] One of the technical problems solved by the utility model is to provide an outer rotor motor that can effectively solve the technical problems of the buckle structure for installing the control board being prone to breakage and failure, having low reliability, and easily damaging the electrical elements of the control board in the prior art.

[0006] The second technical problem solved by the utility model is to provide a fan that can effectively solve the technical problems of the buckle structure for installing the control board being prone to breakage and failure, having low reliability, and easily damaging the electrical elements of the control board in the prior art.

[0007] The first technical problem is solved by the following technical solution:

[0008] The outer rotor motor includes a base, an injection molded stator, and a control board. The injection molded stator is installed on the base. The injection molded stator includes a core and a coil wound around the core. The lead wire of the coil is connected to a pin.

[0009] One end of the base in the axial direction is provided with a mounting groove. The mounting groove is provided with a locking column. The pin penetrates the base and extends into the mounting groove. The control board is installed in the mounting groove and is sleeved on the locking column. The pin is welded to the control board.

[0010] Compared with the background technology, the outer rotor motor has the following beneficial effects:

[0011] The electric control board of the outer rotor motor is installed in the mounting groove of the base body, and the electric control board is sleeved on the locking column, and the pin is welded and connected with the electric control board. The locking column and the pin are used for limiting the mounting plate, without the buckle structure arranged on the base body, the risk that the buckle is broken and causes the installation failure of the electric control board is avoided, and the stable installation of the mounting plate in the base body is realized. Meanwhile, the locking column and the pin will not cause damage to the electrical elements on the electric control board, and the safety of the electric control board is improved.

[0012] In one of the embodiments, the locking column comprises a first column body, one end of the first column body is provided with a second column body, and the first column body and the second column body have a stepped surface therebetween, the electric control board is sleeved on the second column body and supported on the stepped surface.

[0013] In one of the embodiments, the bottom wall of the mounting groove is provided with a supporting column, the top end of the supporting column is coplanar with the stepped surface, and the electric control board is supported on the top end of the supporting column.

[0014] In one of the embodiments, the outer rotor motor further comprises a dust cover, the dust cover is arranged on the mounting groove and connected with the locking column through a fastener.

[0015] In one of the embodiments, the dust cover comprises a cover plate, an outer edge is arranged on the top end of the cover plate in the circumferential direction, and the outer edge is lapped on the outer side edge of the mounting groove.

[0016] In one of the embodiments, a boss is arranged on the dust cover towards the locking column, and the height of the bottom end of the boss is equal to the height of the upper surface of the electric control board along the height direction of the base body.

[0017] The boss is provided with a first hole, the locking column is provided with a second hole in the axial direction, and the fastener passes through the first hole and is threadedly connected with the second hole.

[0018] In one of the embodiments, a first wire passing hole is arranged on the circumferential edge of the electric control board, a second wire passing hole is arranged on the circumferential edge of the dust cover, the first wire passing hole and the second wire passing hole are communicated to form a wire passing channel for the power line of the electric control board.

[0019] In one of the embodiments, a heat sink is arranged between the electric control board and the dust cover.

[0020] In one of the embodiments, the bottom wall of the mounting groove is provided with an avoiding groove, one end of the locking column is arranged on the bottom wall of the avoiding groove, and the other end of the locking column extends into the mounting groove.

[0021] The second technical problem is solved by the following technical scheme:

[0022] A fan comprising the outer rotor motor described above.

[0023] Compared with the background art, the fan has the beneficial effects that:

[0024] The electric control board of the outer rotor motor is installed in the mounting groove of the base body, and the electric control board is sleeved on the locking column, and the pin is connected with the electric control board by welding. The locking column and the pin are used for limiting the mounting plate, without the buckle structure arranged on the base body, so that the risk of mounting failure of the electric control board caused by the buckle fracture is avoided, and stable installation of the mounting plate in the base body is realized. At the same time, the locking column and the pin will not damage the electrical elements on the electric control board, thereby improving the safety of the electric control board, and improving the safety and reliability of the fan. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a sectional view of the outer rotor motor provided by the utility model embodiment;

[0026] Figure 2 is a sectional view of the base body with the motor stator injection molded, provided by the utility model embodiment;

[0027] Figure 3 is a structural schematic view of the outer rotor motor with the dust cover removed, provided by the utility model embodiment;

[0028] Figure 4 is Figure 1 the local enlarged view of A in FIG. 6;

[0029] Figure 5 is Figure 1 the local enlarged view of B in FIG. 6;

[0030] Figure 6 is a top view of the outer rotor motor provided by the utility model embodiment.

[0031] The component names and numbers in the figure are as follows:

[0032] 1, base body; 11, mounting groove; 12, locking column; 120, second hole; 121, first column body; 122, second column body; 123, step surface; 13, support column; 14, avoiding groove; 2, injection molded stator; 21, iron core; 22, coil; 23, pin; 3, fan blade rotor; 4, electric control board; 41, first threading hole; 42, power line; 5, dust cover; 51, cover plate; 511, boss; 5111, first hole; 512, second threading hole; 52, outer edge; 6, fastener; 7, bearing; 8, shock pad. DETAILED DESCRIPTION

[0033] To make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model is further illustrated below in conjunction with the drawings and through specific embodiments. It can be understood that the specific embodiments described herein are merely used to explain the utility model and not to limit the utility model. In addition, it needs to be explained that, for the convenience of description, only the parts related to the utility model are shown in the drawings and not all.

[0034] In the description of the utility model, unless another explicit provision and limitation, the terms "connected", "connected", "fixed" should be broad sense understanding, for example, can be fixed connection, or can be detachable connection, or be integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through the intermediate medium, can be two elements inside the communication or the interaction relationship of two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless another explicit provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, or can include the first and second features not direct contact but contact through another feature between them. In addition, the terms "first", "second" are merely used to distinguish in the description and have no special meaning.

[0036] The technical scheme of the utility model is further illustrated below in conjunction with the drawings and through specific embodiments.

[0037] The embodiment proposes a fan, and the fan comprises an outer rotor motor. The fan is mainly used in a gas water heater, an oil smoke extractor or other equipment, which is not specifically limited here.

[0038] As shown in Figure 1 And Figure 2 The embodiment also proposes an outer rotor motor, and the outer rotor motor comprises a base body 1, an injection molded stator 2, a fan blade rotor 3, an electric control board 4, a bearing 7 and a damping pad 8. The injection molded stator 2 is installed on the base body 1, and the base body 1 and the injection molded stator 2 are integrally formed by injection molding. The fan blade rotor 3 is installed in the base body 1 through the bearing 7. The injection molded stator 2 comprises an iron core 21 and a coil 22 wound on the iron core 21. The coil 22 is connected with a pin 23. The electric control board 4 is installed in the base body 1 and is connected with the pin 23 by welding. The damping pad 8 is installed on the outer periphery of the base body 1 to reduce the vibration when the fan works. Since the fan is prior art, the specific structure and working process of the fan are not described again.

[0039] In the existing outer rotor motor, a buckle structure with a clamping position and a clamping buckle is arranged on the base, and the electric control board is installed on the base through the buckle structure. Since the protruding part (the clamping buckle head or the barb) of the clamping buckle is prone to breakage during installation, it may cause the electric control board to fail to be installed, and the reliability is low. Moreover, the protruding part of the clamping buckle abuts against the upper surface of the electric control board to press and fix the electric control board on the base, and the electrical elements of the electric control board are prone to be damaged.

[0040] To solve the above problems, as shown in Figures 3 to 5 In the outer rotor motor of the embodiment, an installation groove 11 is arranged at one end of the base 1 in the axial direction, a locking column 12 is arranged in the installation groove 11, and the pin 2 penetrates through the base 1 and extends into the installation groove 11. The electric control board 4 is installed in the installation groove 11 and sleeved on the locking column 12, and the pin 23 is welded and connected with the electric control board 4. The electric control board 4 of the outer rotor motor is installed in the installation groove 11 of the base 1, and the electric control board 4 is sleeved on the locking column 12, and the pin 23 is welded and connected with the electric control board 4. The locking column 12 and the pin 23 limit the installation plate, and no clamping buckle structure is arranged on the base 1, thereby avoiding the risk that the clamping buckle breakage causes the electric control board 4 to fail to be installed, and achieving stable installation of the installation plate in the base 1. At the same time, the locking column 12 and the pin 23 will not damage the electrical elements on the electric control board 4, thereby improving the safety of the electric control board 4, and further improving the safety and reliability of the fan.

[0041] In the embodiment, the electric control board 4 is installed in the base 1 through the above-mentioned locking column 12 and pin 23, thereby avoiding the pressure impact during the integral injection molding of the base 1, improving the reliability of the installation of the electric control board 4, and further reducing the risk of installation failure of the electric control board 4. At the same time, the electric control board 4 is convenient to disassemble and assemble from the base 1, thereby being convenient for maintenance and replacement.

[0042] Specifically, the pin 23 is integrally injection molded with the base 1, one end of the pin 23 is wound with the lead-out wire of the iron core 21 and is fixed and connected through tin soldering, the other end of the pin 23 extends into the installation groove 11 and penetrates through the preset welding hole on the electric control board 4, and then the pin 23 is welded and connected with the electric control board 4. At the same time, the electric control board 4 is provided with a relief hole and is sleeved on the locking column 12 through the relief hole, so as to achieve the limiting installation of the electric control board 4.

[0043] As shown in Figure 2 and Figure 3 The bottom wall of the installation groove 11 is provided with an avoiding groove 14, one end of the locking column 12 is arranged on the bottom wall of the avoiding groove 14, and the other end of the locking column 12 extends into the installation groove 11. Through the arrangement of the avoiding groove 14, not only the material amount during the injection molding of the base 1 is reduced, but also the lightweight design of the outer rotor motor is achieved, and at the same time, the avoiding groove 14 accommodates the electrical elements installed on the electric control board 4, which is conducive to improving the protection of the electric control board 4.

[0044] As shown in Figure 3As shown, the locking column 12 includes a first column body 121, one end of the first column body 121 extends and is provided with a second column body 122, and the first column body 121 and the second column body 122 have a stepped surface 123 therebetween. The electric control board 4 is sleeved on the second column body 122 and is supported on the stepped surface 123. The diameter of the second column body 122 is smaller than that of the first column body 121, so that the locking column 12 is a stepped shaft structure, and the second column body 122 limits the electric control board 4 in the circumferential direction. At the same time, the electric control board 4 is supported by the stepped surface 123, so as to avoid tilting of the electric control board 4.

[0045] Further, the bottom wall of the mounting groove 11 is protrudingly provided with a support column 13, the top end of the support column 13 is coplanar with the stepped surface 123, and the electric control board 4 is supported on the top end of the support column 13. The bottom wall of the mounting groove 11 is protrudingly provided with a plurality of support columns 13, and the support columns 13 and the stepped surface 123 jointly support the electric control board 4, further improving the stability of the installation of the electric control board 4.

[0046] As shown in Figure 1 , Figure 4 and Figure 5 , the outer rotor motor further includes a dust cover 5, which is coveringly arranged on the mounting groove 11 and is connected with the locking column 12 through the fastener 6. By arranging the dust cover 5, dust, water and other impurities outside the base body 1 can be prevented from entering the mounting groove 11, so as to avoid pollution or corrosion of the electric control board 4, and the safety of the electric control board 4 is improved.

[0047] Specifically, as shown in Figure 4 , the dust cover 5 includes a cover plate 51, the top end of the cover plate 51 is circumferentially and extendingly provided with an outer edge 52, the cover plate 51 is in interference fit with the mounting groove 11, and the outer edge 52 is lapped on the outer side edge of the mounting groove 11. By interference fit between the cover plate 51 and the mounting groove 11, small gaps between the cover plate 51 and the mounting groove 11 are avoided, and the sealing between the cover plate 51 and the mounting groove 11 is improved. By lapping the outer edge 52 on the outer side edge of the mounting groove 11, the dust cover 5 is limited in the height direction (up-down direction in the figure) of the base body 1, so as to avoid the dust cover 5 from exerting extrusion force on the electric control board 4 when the fastener 6 is tightened, thereby avoiding damage to the electrical elements on the electric control board 4.

[0048] Specifically, the dust cover 5 is provided with a boss 511 facing the locking column 12, and the height of the bottom end of the boss 511 is equal to the height of the upper surface of the electric control panel 4 along the height direction of the base body 1. When the screw is tightened, the bottom end of the boss 511 only contacts the surface of the electric control panel 4 and does not press the electric control panel 4 due to the existence of the outer edge 52, that is, the dust cover 5 does not exert a pressing force on the electric control panel 4, thereby avoiding damage to the electrical components on the electric control panel 4 and further improving the safety of the electric control panel 4. The boss 511 is provided with a first hole 5111, the locking column 12 is provided with a second hole 120 along the axial direction, and the fastener 6 is screwed through the first hole 5111 and the second hole 120. The locking column 12 of the embodiment is a screw column, and the fastener 6 is a screw. When the dust cover 5 is installed in the mounting groove 11, the dust cover 5 is locked in the locking column 12 by the screw to achieve stable installation of the dust cover 5. It should be noted that the head of the screw extends into the interior of the boss 511 to avoid the screw protruding from the outer surface of the dust cover 5, so as to ensure the flatness of the surface of the dust cover 5.

[0049] The boss 511 is provided to have sufficient space between the dust cover 5 and the upper surface of the electric control panel 4 to accommodate the electrical components installed on the upper surface of the electric control panel 4, thereby avoiding damage to the electric control panel 4 and further improving the protection of the electric control panel 4. Meanwhile, the electric control panel 4 and the dust cover 5 are provided with heat dissipation fins to quickly conduct the heat generated by the electric control panel 4 to the dust cover 5 and then dissipate to the outside of the base body 1, thereby improving the heat dissipation effect of the electric control panel 4 and being beneficial to improving the overall heat dissipation performance of the outer rotor motor and the fan. The heat dissipation fins can be heat-conducting silica gel sheets.

[0050] As shown in Figure 5 and Figure 6 , the circumferential edge of the electric control panel 4 is provided with a first threading hole 41, and the circumferential edge of the dust cover 5 is provided with a second threading hole 512, the first threading hole 41 and the second threading hole 512 are communicated to form a threading channel for the power cord 42 of the electric control panel 4. The power cord 42 extends out of the base body 1 after passing through the first threading hole 41 and the second threading hole 512 in sequence, and the opening area of the first threading hole 41 and the second threading hole 512 is small, which does not affect the dustproof effect of the dust cover 5.

[0051] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above embodiments. Without departing from the spirit and scope of the present application, various changes and modifications can be made to the present application, and these changes and modifications all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An external rotor electric machine, characterized by, The base body (1) is provided with an installation groove (11) at one end in the axial direction, and a locking column (12) is arranged in the installation groove (11); the pin (23) penetrates through the base body (1) and extends into the installation groove (11); and the electric control board (4) is arranged in the installation groove (11) and sleeved on the locking column (12), and the pin (23) is welded to the electric control board (4). The locking column (12) comprises a first column body (121), one end of the first column body (121) is provided with a second column body (122), and a stepped surface (123) is arranged between the first column body (121) and the second column body (122); the electric control board (4) is sleeved on the second column body (122) and supported on the stepped surface (123).

2. An external rotor electric machine according to claim 1, characterized in that The bottom wall of the installation groove (11) is provided with a supporting column (13), the top end of the supporting column (13) is coplanar with the stepped surface (123), and the electric control board (4) is supported on the top end of the supporting column (13).

3. An external rotor electric machine according to claim 2, characterized in that The outer rotor motor further comprises a dust cover (5), and the dust cover (5) covers the installation groove (11) and is connected to the locking column (12) through a fastener.

4. The external rotor electric machine of claim 1, wherein, The dust cover (5) comprises a cover plate (51), and an outer edge (52) is arranged at the top end of the cover plate (51) in the circumferential direction; the outer edge (52) is overlapped with the outer side edge of the installation groove (11).

5. An external rotor electric machine according to claim 4, characterized in that, The dust cover (5) is provided with a boss (511) facing the locking column (12); in the height direction of the base body (1), the height of the bottom end of the boss (511) is equal to the height of the upper surface of the electric control board (4).

6. An external rotor electric motor as claimed in claim 5, characterised in that, The boss (511) is provided with a first hole (5111), and the locking column (12) is provided with a second hole (120) in the axial direction; the fastener penetrates through the first hole (5111) and is screwed into the second hole (120). The circumferential edge of the electric control board (4) is provided with a first wire penetrating hole (41), and the circumferential edge of the dust cover (5) is provided with a second wire penetrating hole (512); the first wire penetrating hole (41) and the second wire penetrating hole (512) are communicated to form a wire penetrating channel for the power line (42) of the electric control board (4).

7. An external rotor electric motor as claimed in claim 4, characterised in that, The electric control board (4) and the dust cover (5) are provided with a heat sink therebetween.

8. An external rotor electric motor as claimed in claim 4, characterised in that, The bottom wall of the installation groove (11) is provided with an avoiding groove (14), one end of the locking column (12) is arranged on the bottom wall of the avoiding groove (14), and the other end of the locking column (12) extends into the installation groove (11).

9. The external rotor electric machine according to any one of claims 1 to 8, characterized by The outer rotor motor comprises any one of claims 1-9.

10. A fan characterised by The outer rotor motor comprises any one of claims 1-9.

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