WO2015035765A1 - External rotor motor structure - Google Patents

Abstract

An external rotor motor structure comprises a motor entity part and a controller part. The motor entity part comprises a stator assembly (1), an external rotor assembly (2), a rotating shaft (3), and a base (4). The controller part comprises a control box (5) and a control circuit board (6) integrated with an electronic component. The control box (5) is mounted on a top surface of the base (4). The control circuit board (6) is mounted on a top wall of a cavity (51) of the control box (5) in an inverted manner. The structure is simple, has good waterproof and draining performance, is convenient to mount and is solid and firm, and has high reliability.

Description

 External rotor motor structure

Technical field:

 The utility model relates to an outer rotor motor structure.

Background technique:

 The existing outer rotor motor comprises a motor solid part and a controller part, wherein the motor solid part comprises a stator assembly, an outer rotor assembly, a rotating shaft and a base, and the controller part comprises a control box and a control circuit board integrated with the electronic device, the middle of the base The sleeve is extended downward, the rotating shaft is located inside the sleeve and supported on the bearing at both ends of the sleeve, the stator assembly is sleeved outside the sleeve, the rotating shaft and the outer rotor assembly are connected together, and the outer rotor assembly is nested in the stator assembly Outside, the control box is mounted on the top surface of the base, and the control circuit board is located inside the cavity of the control box and mounted on the top surface of the base. However, the outer rotor motor of this structure has the following problems: 1) From the control box The lead drawn from the top is easy to enter the water. The water flows directly from the top of the control box to the control circuit board, which eventually leads to damage to the control circuit board and affects the normal operation of the motor. 2) The drainage performance of the base is poor, and water is easily formed on the top surface of the base. The accumulated water may even flow into the stator assembly or the outer rotor assembly below the base, resulting in electricity. Can not operate normally, there is a big safety hazard; 3) controlling the installation trouble between the cartridge and the base, low reliability, easy to loose, sealing performance is poor. 4) The rotor structure of the existing outer rotor motor includes a casing sleeve, a plurality of magnetic tiles, a rotating shaft and a sleeve, and a plurality of magnetic tiles are circumferentially adhered and mounted on the inner wall of the cavity of the casing sleeve, in the casing sleeve A through hole is defined in the middle of the bottom wall of the cavity, and the sleeve is nested and installed in the middle of the through hole. The rotating shaft is located inside the cavity and is nested in the middle of the sleeve with one end of the rotating shaft. However, the rotor structure has the following problems: Poor insulation performance, easy to generate shaft current between the inner and outer rings of the bearing, the shaft and the casing, the shaft current corrodes the bearing, which seriously affects the safe operation of the motor; and the damping effect is poor, and vibration and noise are easily generated when the motor is running.

Summary of the invention:

 The purpose of the utility model is to provide an outer rotor motor structure, which has the advantages of simple structure, good waterproof and drainage performance, convenient installation, firmness and reliability, and high reliability.

 The object of the present invention is achieved by the following technical solutions.

An outer rotor motor structure includes a motor body portion and a controller portion, wherein the motor body portion includes a stator assembly, an outer rotor assembly, a rotating shaft and a base, and the controller portion includes a control box and an integrated Control circuit board for electronic devices:

 a sleeve is extended downwardly in the middle of the base, a bearing chamber is arranged at both ends of the sleeve seat, and a bearing is mounted in the bearing chamber, and the rotating shaft is located inside the sleeve seat and the two ends are supported on the bearing;

 The stator assembly comprises a stator core, an end insulation and a coil winding, the end insulation is mounted on the end face of the stator core, the coil winding is wound around the end insulation, and the core through hole is formed in the stator core, the stator core Set through the iron core through hole outside the sleeve;

 The outer rotor assembly comprises a casing sleeve with a cavity and a plurality of permanent magnets mounted on the inner wall of the cavity of the casing sleeve, a mounting hole is arranged in the middle of the casing sleeve, and the rotating shaft is mounted on the mounting hole, the casing sleeve Nested outside the stator assembly;

 The control box is mounted on the top surface of the base, and the control circuit board is flipped over the top wall of the cavity of the control box. The top of the control box described above is recessed to form a control box step, and a retaining sleeve is mounted on the step of the control box, and the inlet of the retaining sleeve is lower than the control circuit board.

 The top surface of the base is recessed to form a dimple, and a plurality of drainage holes are formed on the outer side of the outer rotor assembly and on the edge of the bottom surface of the dimple. The bottom surface of the dimple is an inclined plane with a low height in the middle and the periphery.

 The end of the control box protrudes outwardly from the upper mounting edge, and the outer edge of the base protrudes outwardly from the lower mounting edge, and the upper mounting side and the lower mounting side are locked and assembled by screws, and the upper mounting side and the lower mounting side are arranged. There are a plurality of mounting through holes, and an outer side edge of the base protrudes upwardly with an annular flange extending into the cavity of the control box and abutting against the inner wall of the cavity.

 The lead hole is formed on the base, so that the electric wire on the motor body is electrically connected to the control circuit board through the lead hole, and the first boss is protruded along the outer side of the lead hole and protrudes from the outer side of the bearing and the base. a second boss, a cover plate is mounted on the top of the second boss, a mounting flange is disposed outside the casing sleeve, and a Hall circuit board is mounted on the stator assembly under the base, and the Hall circuit board is mounted on the Hall board. The component directly detects the magnetic field of the permanent magnet and transmits the signal to the control board.

 The casing sleeve described above is made of a metal material, and an insulating layer is disposed at one end of the rotating shaft, and the insulating layer is wrapped on the outer surface of the end portion of the rotating shaft, and the rotating shaft is located inside the cavity and the insulating layer at the end of the rotating shaft Nested on the mounting hole.

The above-mentioned mounting hole is nested and installed with a sleeve, and the end of the rotating shaft is nested and installed in the middle of the sleeve. The insulating layer is disposed between the sleeve and the rotating shaft, and the outer wall of the insulating layer protrudes outwardly from the plurality of blocks, and the inner wall of the sleeve is provided with a plurality of card slots, and the card block is nested inside the card slot.

 The outer surface of the rotating shaft is provided with an annular groove. The inner wall of the insulating layer protrudes inwardly from the annular convex block, and the annular convex block is embedded in the annular groove. The insulating layer is injection-molded between the sleeve and the rotating shaft.

 The outer edge of the two end faces of the insulating layer protrudes outwardly with an annular flange, and the two annular flanges respectively press the two end faces of the sleeve, and a step is arranged on the end of the rotating shaft, and the insulating layer is embedded The sleeve is mounted on the steps.

 The above-mentioned mounting base is protruded inward along the inner wall of the mounting hole, and the insulating layer at the end of the rotating shaft is nested and installed in the mounting seat.

Compared with the prior art, the utility model has the following effects: 1) an outer rotor motor structure, comprising a motor solid part and a controller part, wherein the motor solid part comprises a stator component, an outer rotor component, a rotating shaft and a base, and the controller The part comprises a control box and a control circuit board integrated with electronic components. The base extends downwardly from the sleeve seat. The sleeve seat is provided with a bearing chamber at both ends, and the bearing chamber is provided with a bearing. The rotating shaft is located inside the sleeve seat and supports both ends. In the bearing, the stator assembly comprises a stator core, an end insulation and a coil winding, the end insulation is mounted on the end face of the stator core, the coil winding is wound around the end insulation, and the core through hole is opened in the middle of the stator core The stator core is sleeved outside the sleeve through the iron core through hole, and the outer rotor assembly comprises a casing sleeve with a cavity and a plurality of permanent magnets mounted on the inner wall of the cavity of the casing sleeve, the top of the casing sleeve A mounting hole is arranged in the middle, the rotating shaft is mounted on the mounting hole, the casing sleeve is nested outside the stator assembly, and the control box is mounted on the top surface of the base, the control line The board is flipped on the top wall of the cavity of the control box, so the water flowing from the lead position of the control box does not directly flow to the control circuit board, and the control circuit board can be effectively protected. The structure is simple, the waterproof performance is good, and the reliability is reliable. 2) The top of the control box is recessed to form a control box step. A retaining sleeve is installed on the step of the control box. The inlet of the retaining sleeve is lower than the control circuit board, so the water flowing in from the retaining sleeve flows directly to the top of the base. On the surface, it will not flow to the control circuit board. The structure is simple and the waterproof performance is good. 3) The top surface of the base is recessed to form a pit, and a plurality of drainage holes are formed on the outer side of the outer rotor assembly and the edge of the bottom surface of the pit. The water flowing out from the drain hole of the base does not flow into the stator assembly or the outer rotor assembly under the base, so the stator assembly and the outer rotor assembly can be effectively protected. The structure is simple, waterproof and drainage performance, high reliability, and pit The bottom surface is a middle high four The low-inclined plane of the circumference, the simple structure, the inclined plane facilitates drainage, and does not form water on the top surface of the base; 4) the end of the control box protrudes outwardly to the mounting edge, and the outer edge of the base protrudes outwardly from the lower mounting edge The upper mounting side and the lower mounting side are locked and assembled by screws. The structure is simple, and the connection between the control box and the base is more convenient, firm and reliable, and the reliability is high; 5) the outer edge protrudes upward Annular flange, the annular flange extends into the cavity of the control box and abuts against the inner wall of the cavity, so that water flowing from the outside of the control box does not easily penetrate into the base, and the structure is simple, sealing and waterproof; 6) a lead hole is formed in the base, so that the wire on the motor body is electrically connected to the control circuit board through the lead hole, and the first boss is protruded along the outer side of the lead hole, and the second boss is extended along the outer side of the bearing and the base , so that the water on the top surface of the base does not flow into the stator assembly or the outer rotor assembly under the base, the structure is simple, the waterproof performance is good, and the top of the second boss is installed. The utility model has a cover plate to prevent the water flowing from the retaining sleeve from flowing into the bearing chamber, the structure is simple and the waterproof performance is good; 7) the mounting flange is arranged outside the casing sleeve, the structure is simple, and the installation of the motor is more convenient; The casing sleeve is made of a metal material, and an insulating layer is disposed at one end of the rotating shaft, and the insulating layer is wrapped around the outer surface of the end of the rotating shaft, and the rotating shaft is located inside the cavity and the insulating layer at the end of the rotating shaft is nested and installed. On the mounting hole, the structure is simple, the installation is convenient, the insulation performance is good, the insulation layer can effectively isolate the shaft current, prevent the shaft current from being generated, and prolong the service life of the rotor assembly; 9) The sleeve is installed in the middle of the mounting hole, the shaft The end is nested in the middle of the sleeve, the insulating layer is disposed between the sleeve and the rotating shaft, and the outer wall of the insulating layer protrudes outwardly from the plurality of blocks, the inner wall of the sleeve is provided with a plurality of card slots, and the card block is nested inside the card slot, the structure Simple, easy to install, reliable connection, not easy to loose; 10) The outer surface of the shaft is provided with an annular groove, and the inner wall of the insulating layer protrudes inwardly from the annular projection, and the annular projection is set An annular groove in which the insulating layer is installed between the injection sleeve and the shaft, simple production process, and low cost. The insulating effect is ideal; 11) the outer edge of the two end faces of the insulating layer protrudes outwardly with a circular flange, and the two annular flanges respectively press the two end faces of the sleeve, and a step is provided on the end of the rotating shaft, and the insulation is provided. The layers are nested and mounted on the steps, and the structure is simple, the installation is convenient, and the connection is reliable.

BRIEF DESCRIPTION OF THE DRAWINGS:

 Figure 1 is a perspective view of the outer rotor motor of the present invention;

 Figure 2 is an exploded view of the outer rotor motor of the present invention;

Figure 3 is another exploded view of the outer rotor motor of the present invention; Figure 4 is a plan view of the outer rotor motor of the present invention;

 Figure 5 is a cross-sectional view taken along line A-A of Figure 4;

 Figure 6 is a perspective view of the assembly of the outer rotor assembly and the rotating shaft;

 Figure 7 is an exploded view of Figure 6;

 Figure 8 is a plan view of Figure 6;

 Figure 9 is a cross-sectional view taken along line B-B of Figure 8;

 Figure 10 is a partial enlarged view of the C-C of Figure 9;

 Figure 11 is a front view of Figure 6;

 Figure 12 is a partial cross-sectional view taken along line D-D of Figure 11;

 Figure 13 is a cross-sectional view showing the structure of the outer rotor assembly and the rotating shaft assembly in the second embodiment.

detailed description:

 The present invention will be further described in detail below through the specific embodiments and the accompanying drawings.

 Embodiment 1 As shown in FIG. 1 to FIG. 12, the utility model relates to an outer rotor motor structure, which comprises a solid part of a motor and a controller part, wherein the solid part of the motor comprises a stator assembly 1, an outer rotor assembly 2, a rotating shaft 3 and The base 4, the controller part comprises a control box 5 and a control circuit board 6 integrated with electronic components: the base 4 extends downwardly from the sleeve seat 41, and both ends of the sleeve seat 41 are provided with a bearing chamber 410, the bearing chamber 41 0 inside The bearing 42 is mounted, the rotating shaft 3 is located inside the sleeve seat 41 and supported at both ends on the bearing 42. The stator assembly 1 includes a stator core 11, an end insulation 12 and a coil winding 13 , and the end insulation 12 is mounted on the stator core 11 On the end surface, the coil winding 13 is wound around the end insulation 12, and a core through hole is opened in the middle of the stator core 11, and the stator core 11 is set outside the sleeve seat 41 through the iron core through hole;

 The outer rotor assembly 2 includes a casing sleeve 21 with a cavity 210 and a plurality of permanent magnets 22 mounted on the inner wall of the cavity 210 of the casing sleeve 21. A mounting hole 211 is disposed in the middle of the casing sleeve 21, and the rotating shaft 3 is installed. On the mounting hole 211, the casing sleeve 21 is nested outside the stator assembly 1;

 The control box 5 is mounted on the top surface of the base 4, and the control circuit board 6 is mounted on the top wall of the cavity 51 of the control box 5.

The top of the control box 5 is recessed to form a control box step 52, and a retaining sleeve 7 is mounted on the control box step 52, and the inlet of the retaining sleeve 7 is lower than the control circuit board 6. The top surface of the base 4 is recessed to form a recess 430. On the outer side of the outer rotor assembly 2, a plurality of drain holes 43 are formed on the edge of the bottom surface of the recess 430. The bottom surface of the recess 430 is an inclined plane which is low in the middle and high.

 The end of the control box 5 protrudes outwardly from the mounting edge 53, and the outer edge of the base 4 protrudes outwardly from the lower mounting edge 44. The upper mounting edge 53 and the lower mounting edge 44 are locked and assembled by screws 8, and the upper mounting edge 53 and the lower side are mounted. The mounting edge 44 is provided with a plurality of mounting through holes 54 extending upwardly from the outer edge of the base 4, and the annular flange 45 projects into the cavity 51 of the control box 5 and abuts against the inner wall of the cavity 51.

 A lead hole 46 is defined in the base 4 so that the electric wire on the motor body is electrically connected to the control circuit board 6 through the lead hole 46. The first boss 47 protrudes from the outside of the lead hole 46 and the base 4, along the outer side of the bearing chamber 41 0 a second boss 48 is protruded from the base 4, a cover plate 9 is mounted on the top of the second boss 48, and a mounting flange 10 is disposed outside the casing sleeve 21, below the base 4, on the stator assembly 1. The Hall circuit board 14 is mounted, and the Hall element on the Hall circuit board 14 directly detects the magnetic field of the permanent magnet 22 and transmits a signal to the control circuit board 6.

 The casing sleeve 21 is made of a metal material, and an insulating layer 31 is disposed at the end of the rotating shaft 3, and the insulating layer 31 is wrapped around the outer surface of the end of the rotating shaft, and the rotating shaft 3 is located inside the cavity 21 0 and the rotating shaft 3 The end insulating layer 31 is nested and mounted on the mounting hole 21 1 .

 A sleeve 15 is nested in the middle of the mounting hole 21 1 . The end of the rotating shaft 3 is nested and installed in the middle of the sleeve 15 . The insulating layer 31 is disposed between the sleeve 15 and the rotating shaft 3 , and the outer wall of the insulating layer 31 protrudes outwardly. Block 31 1. The inner wall of the sleeve 1 5 is provided with a plurality of card slots 151, and the block 31 1 is nested inside the card slot 151.

 The outer surface of the rotating shaft 3 is provided with an annular groove 32. The inner wall of the insulating layer 31 protrudes inwardly from the annular convex block 31 2 , and the annular protruding block 312 is embedded in the annular groove 32 . The insulating layer 31 is injection molded on the sleeve 15 and Between the shafts 3.

 An annular flange 31 3 is protruded outwardly on the outer edges of the two end faces of the insulating layer 31. The two annular flanges 31 3 respectively press the two end faces of the sleeve 15, and the end of the rotating shaft 3 is provided with a step. 33. The insulating layer 31 is nested and mounted on the step 33.

The principle of the utility model is: the control box 5 is mounted on the top surface of the base 4, the control circuit board 6 is flipped on the top wall of the cavity 51 of the control box 5, and the top of the control box 5 is recessed to form the control box step 52, under control A retaining sleeve 7 is mounted on the box step 52, and the inlet of the retaining sleeve 7 is lower than the control circuit board 6, so that the retaining wire The water flowing in the sleeve 7 does not flow onto the control circuit board 6, so that the control circuit board 6 can be effectively protected from the water damage of the control circuit board 6.

 Embodiment 2: As shown in FIG. 13 , the difference from the first embodiment is that the mounting seat 21 1 is protruded inward along the inner wall of the mounting hole 21 1 , and the insulating layer 31 at the end of the rotating shaft 3 is nested and mounted on the mounting seat. 21 1 1 inside.

 The principle of the utility model is: the control box 5 is mounted on the top surface of the base 4, the control circuit board 6 is flipped on the top wall of the cavity 51 of the control box 5, and the top of the control box 5 is recessed to form the control box step 52, under control A retaining sleeve 7 is mounted on the box step 52. The inlet of the retaining sleeve 7 is lower than the control circuit board 6, so that water flowing in from the retaining sleeve 7 does not flow onto the control circuit board 6, so that the control circuit board can be effectively protected. 6. Prevent the control circuit board 6 from being damaged by water.

Claims

Rights request 1. An outer rotor motor structure comprising a motor body portion and a controller portion, wherein the motor body portion comprises a stator assembly (1;), an outer rotor assembly (2), a rotating shaft (3) and a base (4), the controller portion Includes control box (5) and control board (6) with integrated electronics: The base (4) extends downwardly from the sleeve seat (41), the sleeve seat (41) is provided with a bearing chamber (410) at both ends, the bearing chamber (410) is provided with a bearing ( ⁴² ), and the rotating shaft (3) is located at the sleeve Inside the cylinder seat ( ⁴ 1 ) and supported at both ends on the bearing ( ⁴² );  The stator assembly (1) comprises a stator core (11), an end insulation (12) and a coil winding (13), the end insulation (12) is mounted on the end face of the stator core (11), and the coil winding (13) is wound Installed on the end insulation (U), a core through hole is formed in the middle of the stator core (11), and the stator core (11) is set outside the sleeve seat (41) through the iron core through hole;  The outer rotor assembly (2) comprises a casing sleeve (21) with a cavity (210) and a plurality of permanent magnets (22) mounted on the inner wall of the cavity (no) of the casing sleeve (n), the casing sleeve a mounting hole ( ι ) is arranged in the middle of the top of the cylinder (n ), the rotating shaft ( 3 ) is mounted on the mounting hole ( ι ), and the casing sleeve ( ) is nested outside the stator assembly (1 ); The utility model is characterized in that: the control box (5) is mounted on the top surface of the base (4), and the control circuit board (6) is flipped on the top wall of the cavity ( ⁵ 1 ) of the control box (5).  2. An outer rotor motor structure according to claim 1, characterized in that: the top of the control box (5) is recessed to form a control box step (52), and a protective sleeve is mounted on the control box step (52) (7) ), the inlet of the retaining sleeve (7) is lower than the control circuit board (6).  3. An outer rotor motor structure according to claim 2, wherein: the top surface of the base (4) is recessed to form a recess (430), on the outer side of the outer rotor assembly (2), the pit (430) A plurality of drainage holes (43) are defined in the edge of the bottom surface, and the bottom surface of the dimple (430) is an inclined plane with a low height in the middle and a low circumference.  4. An outer rotor motor structure according to claim 1 or 2 or 3, wherein: the end of the control box (5) projects outwardly from the mounting edge (53), and the outer edge of the base (4) projects outwardly. Lower mounting side ( 44 ), the upper mounting edge ( 53 ) and the lower mounting edge ( ⁴⁴ ) are locked and assembled by screws ( 8 ), The mounting flange (53) and a lower mounting flange ⁽⁴⁴⁾ is provided with a plurality of mounting holes ⁽⁵⁴⁾ on the outer edge of the base ⁽⁴⁾ up to a projecting annular flange ^(45), an annular bead ⁽⁴ 5) Extend into the cavity (51) of the control box (5) and close to the inner wall of the cavity (51). 5. An outer rotor motor structure according to claim 1 or 2 or 3, wherein: a lead hole (46) is formed in the base (4) so that the wire on the motor body passes through the lead hole (46) and The control circuit board (6) is electrically connected, and protrudes from the outer side of the lead hole ( ⁴⁶ ), the first boss ( ⁴⁷ ) on the base (4), and protrudes along the outer side of the bearing chamber ( ⁴ 10) and the base (4). a boss ( ⁴⁸ ), a cover plate (9) is mounted on the top of the second boss ( ⁴⁸ ), and a mounting flange (10) is disposed outside the casing sleeve (21), below the base (4), in the stator A Hall circuit board (14) is mounted on the component (1), and the Hall element on the Hall circuit board (14) directly detects the magnetic field of the permanent magnet (22) and transmits a signal to the control circuit board (6). 6. An outer rotor motor structure according to claim 1 or 2 or 3, wherein: the casing sleeve (21) is made of a metal material and is provided with insulation at one end of the rotating shaft (3). The layer (31), the insulating layer (31) is wrapped on the outer surface of the end of the rotating shaft, the rotating shaft (3) is located inside the cavity (210) and the insulating layer ( ³ 1 ) at the end of the rotating shaft (3) is nested and installed. Hole (1).  7. An outer rotor motor structure according to claim 6, wherein: the mounting hole (1) The middle nest is mounted with a bushing (15), the end of the rotating shaft (3) is nested and installed in the middle of the bushing (15), and the insulating layer ( ³ 1 ) is disposed on the bushing (I ⁵ ) and the rotating shaft (3) Between the outer wall of the insulating layer ( ³ 1 ), a plurality of clamping blocks ( 311 ) are protruded outward, and the inner wall of the sleeve ( 15 ) is provided with a plurality of card slots ( 151 ) , and the clamping block ( 311 ) is nested inside the card slot ( 151 ). 8. An outer rotor motor structure according to claim 7, wherein: the outer surface of the rotating shaft (3) is provided with an annular groove (32), and the inner wall of the insulating layer (31) protrudes outwardly from the annular convex block. (312), the annular bump (3U) embedded in an annular groove ⁽³²⁾ inside the insulating layer (31) is mounted in the injection sleeve Between (15) and the shaft (3). 9. An outer rotor motor structure according to claim 8, wherein a circular flange (313) is protruded outwardly on the outer edges of both end faces of the insulating layer (31), and two annular flanges are provided. (313) respectively press the two end faces of the sleeve (15), and a step (33) is provided on the end of the rotating shaft (3), and the insulating layer 1) is nested and mounted on the step ( ³³ ). 10. An outer rotor motor structure according to claim 6, wherein: the mounting seat (2111) protrudes inwardly along the inner wall of the mounting hole (211), and the insulating layer (31) at the end of the rotating shaft (3) is embedded. The sleeve is mounted inside the mount (11).