WO2016201808A1

WO2016201808A1 - Brushless direct current external-rotor motor and fan using same

Info

Publication number: WO2016201808A1
Application number: PCT/CN2015/090116
Authority: WO
Inventors: 曾崇生
Original assignee: 中山大洋电机股份有限公司
Priority date: 2015-06-15
Filing date: 2015-09-21
Publication date: 2016-12-22
Also published as: CN204733056U

Abstract

Disclosed is a brushless direct current external-rotor motor, comprising a stator (1), an external rotor (2) and a rotary shaft (3). The external rotor (2) is sheathed on the stator (1). The stator (1) is a plastic packaging stator, comprising a stator iron core (11), an end insulation (12), a coil winding (13) and a plastic packaging body (14), wherein the end insulation (12) is mounted on an end surface of the iron core (11), the coil winding (13) is mounted on the end insulation (12) in a winding manner, and the plastic packaging body (14) integrally connects the stator iron core (11), the end insulation (12) and the coil winding (13). A cavity (10) is formed in the middle of a bottom surface of the stator (1), a sleeve base (4) extends into the cavity (10), the rotary shaft (3) has one end thereof extending through the middle of a bottom wall of the cavity (10) and connected to the stator (1), and the rotary shaft has the other end thereof extending outward from the middle of the sleeve base (4); a circuit board assembly (6) is mounted on the end insulation (12), and a connection socket (61) on the circuit board assembly (6) is exposed from the top surface of the plastic packaging body (14). The structure is simple and realizes the electrical connection to the outside in the form of a connection socket, has a convenient usage and is reliable.

Description

DC brushless outer rotor motor and fan thereof

Technical field:

The utility model relates to a direct current brushless outer rotor motor and a fan thereof.

Background technique:

In the conventional DC brushless outer rotor motor A0, the three-phase line of the stator and the Hall line extend outward through the form of the lead A1, and are electrically connected to the outside through a wire-to-wire connection, but the DC of this structure The brushless outer rotor motor has the following problems:

1) The three-phase line and the Hall line are scattered and disordered, occupying a large space, and are easily scraped by the outer rotor rotating at a high speed, which poses a safety risk;

2) The connection mode of the wire-to-wire, the connection is troublesome, the operation efficiency is low, and the reliability of the connection is relatively poor.

Summary of the invention:

The purpose of the utility model is to provide a DC brushless outer rotor motor, which has a simple structure and is electrically connected to the outside through the form of a socket, and is convenient and reliable to use.

Another object of the present invention is to provide a fan which is simple in structure and electrically connected to the outside through a socket, and is convenient and reliable to use.

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

A DC brushless outer rotor motor comprising a stator, an outer rotor and a rotating shaft, wherein the outer rotor is sleeved outside the stator, wherein the outer rotor comprises a casing sleeve with a cavity and a plurality of inner wall surfaces mounted on the casing sleeve The permanent magnet has a sleeve seat disposed in the middle of the cavity and the sleeve of the casing, and a bearing chamber is respectively disposed at two ends of the sleeve seat, and a bearing is installed in the bearing chamber, and the rotating shaft is located inside the sleeve seat and supported at both ends In the bearing, the stator is a plastic sealed stator, comprising a stator core, an end insulation, a coil winding and a plastic sealing body, the end insulation is mounted on the end surface of the stator core, and the coil winding is wound and installed at the end insulation. The plastic body connects the stator core, the end insulation and the coil winding into a body, and a cavity is formed in the middle of the stator core, and the bearing seat protrudes into the cavity, and one end of the rotating shaft is from the middle of the bottom wall of the cavity. Passing through and connecting with the stator, the other end protruding outward from the middle of the sleeve, and the end insulation is mounted The circuit board assembly, the circuit board assembly is wrapped by the plastic body, and the socket mounted on the circuit board assembly is exposed from the top surface of the molding body.

The circuit board assembly includes a fixing frame, a circuit board, a cover plate and a socket. The top surface of the fixing frame is provided with a cavity, the circuit board is installed in the cavity, and the cover plate is mounted on the top surface of the fixing frame. And the circuit board is fixed in the cavity, the socket is mounted on the top surface of the circuit board and is electrically connected with the circuit board, and the top of the socket protrudes outward from the middle of the cover.

The end insulation includes a ring portion in the middle and a plurality of teeth extending outward from the ring portion, and a slot is provided on an outer edge of each tooth portion, and a lug is mounted in a part of the slot, the lug One end is electrically connected to the coil winding, and the other end passes through the bottom of the holder and extends into the cavity to be electrically connected to the circuit board.

The semicircular groove is provided on the outer edge of each of the teeth.

The Hall element is mounted on the bottom surface of the circuit board, and the Hall element extends into the notch formed by the adjacent two stator teeth in the stator core.

The sleeve is disposed on one side of the cavity and in the middle of the molding body, and the rotating shaft passes through the middle of the cavity and is nested with the sleeve.

The plastic-sealed stator further includes a die-cast sleeve, one end of the die-cast sleeve is nested on the outer side of the sleeve, and the other end is sleeved on the inner wall surface of the stator core, and the plastic seal body is integrally connected with the die-cast sleeve.

The annular wall portion is provided on the outer wall of the die-cast sleeve, and the end surface of the stator core is supported on the step portion.

The top surface of the molded body is provided with a radial heat dissipation rib, and the outer rotor has a flat shape, and a flange is nested on the outer surface of the outer rotor.

A fan comprises a volute, a wind wheel and a DC brushless outer rotor motor, and an air inlet is respectively arranged on both sides of the volute, and the wind wheel and the DC brushless outer rotor motor are located inside the volute, wherein the wind wheel is nested On the outside of the DC brushless outer rotor motor, the two shaft extension ends of the DC brushless outer rotor motor are respectively connected with the mounting brackets mounted on the two air inlets of the volute, and are characterized in that: The brushless outer rotor motor is the brushless outer rotor motor described in any one of claims 1 to 9.

Compared with the prior art, the utility model has the following effects:

1) A circuit board assembly is mounted on the end insulation, and the connection socket on the circuit board assembly is exposed from the top surface of the plastic sealing body. The structure is simple, and the electrical connection is realized with the external form through the socket, which is convenient and reliable to use.

2) a cavity is arranged on the top surface of the fixing frame, the circuit board is installed inside the cavity, the cover plate is mounted on the top surface of the fixing frame and the circuit board is fixed inside the cavity, and the socket is installed on the line The top surface of the board is electrically connected with the circuit board, and the top of the socket protrudes outward from the middle of the cover plate, the structure is simple, the installation is convenient, and the sealing property of the circuit board is good, thereby effectively preventing the circuit board from being contaminated by water or dust. Lead to damage or even scrap, improve reliability and extend service life.

3) A semicircular groove is arranged on the outer edge of each tooth portion, and the semicircular groove is convenient for positioning in the winding fashion clip.

4) One end of the die-casting sleeve is nested on the outer side of the sleeve, and the other end is sleeved on the inner wall surface of the stator core. The plastic sealing body and the die-casting sleeve are integrally connected, and the overall strength of the plastic-sealed stator can be effectively increased by the die-cast sleeve. To prevent the problem of looseness or transmission failure due to insufficient bonding force between the rotating shaft and the stator.

5) Radial heat dissipation ribs are arranged on the top surface of the plastic sealing body to effectively improve the heat dissipation capability of the plastic sealing stator.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 is a perspective view of a conventional DC brushless outer rotor motor;

Figure 2 is a perspective view of a DC brushless outer rotor motor in the embodiment;

Figure 3 is an exploded view of the DC brushless outer rotor motor in the embodiment;

4 is a schematic structural view of a DC brushless outer rotor motor in an embodiment;

Figure 5 is an exploded view of the stator in the embodiment;

Figure 6 is a partial schematic view of the stator in the embodiment;

Figure 7 is a partial exploded view of the stator in the embodiment;

Figure 8 is a perspective view of the fan in the embodiment;

Fig. 9 is a schematic structural view of a fan in the 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. 2 to FIG. 7 , this embodiment is a DC brushless outer rotor motor including a stator 1 , an outer rotor 2 and a rotating shaft 3 , and the outer rotor 2 is sleeved outside the stator 1 , wherein the outer rotor 2 includes a casing sleeve 21 having a cavity 20 and a plurality of permanent magnets 22 mounted on an inner wall surface of the casing sleeve 21, and a sleeve seat 4 is disposed in the cavity 20 and in the middle of the casing sleeve 21, A bearing chamber 40 is disposed at each end of the sleeve base 4, and a bearing 5 is mounted inside the bearing chamber 40. The rotating shaft 3 is located inside the sleeve seat 4 and supported at both ends on the bearing 5, and the stator 1 is a plastic seal The stator includes a stator core 11, an end insulation 12, a coil winding 13 and a molding body 14, the end insulation 12 is mounted on the end surface of the stator core 11, and the coil winding 13 is wound around the end insulation 12, and the plastic body is sealed. The stator core 11, the end insulation 12 and the coil winding 13 are integrally connected, and a cavity 10 is formed in the middle of the stator core 11, and the bearing housing 4 projects into the cavity 10, and the end of the rotating shaft 3 is empty. The bottom wall of the cavity 10 passes through and is connected to the stator 1 and the other end projects outward from the middle of the sleeve 4 A circuit board assembly 6 is mounted on the end insulation 12, and the circuit board assembly 6 is wrapped by the molding body 14, and the socket 61 mounted on the circuit board assembly 6 is exposed from the top surface of the molding body 14. The circuit board assembly 6 includes a fixing frame 62, a circuit board 63, a cover plate 64 and a socket 61. The top surface of the fixing frame 62 is provided with a cavity 620, and the circuit board 63 is mounted inside the cavity 620. 64 is mounted on the top surface of the holder 62 and secures the circuit board 63 inside the cavity 620. The socket 61 is mounted on the top surface of the circuit board 63 and electrically connected to the circuit board 63. The top of the socket 61 is attached from the cover. The plate 64 projects outward in the middle. The end insulation 12 includes a ring portion 121 in the middle and a plurality of teeth 122 extending outward from the ring portion 121. On the outer edge of each tooth portion 122, a slot 1221 is provided, in which a part of the slot Inside the 1221, a lug 7 is mounted. One end of the lug 7 is electrically connected to the coil winding 13, and the other end passes through the bottom of the fixing bracket 62 and extends into the cavity 620 to be electrically connected to the wiring board 63. A semicircular groove 1222 is provided on an outer edge of each of the tooth portions 122. A Hall element 631 is mounted on the bottom surface of the wiring board 63, and the Hall element 631 extends into the notch 110 formed by the adjacent two stator teeth in the stator core 11. On one side of the cavity 10, the molded body 14 A sleeve 8 is provided in the middle, and the shaft 3 passes through the middle of the cavity 10 and is nested with the sleeve 8. The molded stator further includes a die-cast sleeve 9 which is one end of the sleeve sleeve 8 and the other end of which is sleeved on the inner wall surface of the stator core 11 and the molded body 14 and the die-cast sleeve 9 Linked into one. An annular step portion 91 is provided on the outer wall of the die-cast sleeve 9, and an end surface of the stator core 11 is supported on the step portion 91. A radial heat radiating rib 141 is provided on the top surface of the molded body 14, and the outer rotor 2 has a flat shape. A flange 23 is nested around the outer rotor 2.

Embodiment 2: As shown in FIG. 8 and FIG. 9, the present embodiment is a fan including a volute 101, a wind wheel 102, and a DC brushless outer rotor motor 103, which are respectively opened on both sides of the volute 101. The tuyere 1010, the wind wheel 102 and the brushless outer rotor motor 103 are located inside the volute 101, wherein the wind wheel 102 is nested outside the DC brushless outer rotor motor 103, and the two axes of the DC brushless outer rotor motor 103 The extension ends are respectively connected to the mounting brackets 104 mounted on the two air inlets 1010 of the volute 101. The DC brushless outer rotor motor 103 is the DC brushless outer rotor motor described in the first embodiment. I will not repeat them here.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and scope of the present invention are equivalent. The manner of replacement is included in the scope of protection of the present invention.

Claims

A DC brushless outer rotor motor comprises a stator (1), an outer rotor (2) and a rotating shaft (3), and the outer rotor (2) is sleeved outside the stator (1), wherein the outer rotor (2) comprises a bearing a casing sleeve (21) of the cavity (20) and a plurality of permanent magnets (22) mounted on the inner wall surface of the casing sleeve (21) in the middle of the cavity (20) and the casing sleeve (21) A sleeve seat (4) is provided, and a bearing chamber (40) is respectively disposed at two ends of the sleeve seat (4), and a bearing (5) is installed in the bearing chamber (40), and the rotating shaft (3) is located at the sleeve seat (4) Inside and at both ends supported on said bearing (5), said stator (1) being a molded stator comprising a stator core (11), an end insulation (12), a coil winding (13) and a molded body (14) The end insulation (12) is mounted on the end face of the stator core (11), the coil winding (13) is wound around the end insulation (12), and the plastic body (14) is used to machine the stator iron The core (11), the end insulation (12) and the coil winding (13) are integrally connected, a cavity (10) is formed in the middle of the stator core (11), and the bearing seat (4) extends into the cavity (10) Inside, one end of the rotating shaft (3) passes through the middle of the bottom wall of the cavity (10) and is connected with the stator (1), and the other end is The tube seat (4) protrudes outwardly, and is characterized in that a circuit board assembly (6) is mounted on the end insulation (12), and the circuit board assembly (6) is wrapped by the plastic body (14) and mounted on the circuit board. A socket (61) on the component (6) is exposed from the top surface of the molding body (14).
A brushless outer rotor motor according to claim 1, wherein said circuit board assembly (6) comprises a fixing frame (62), a circuit board (63), a cover plate (64) and a socket. (61), a cavity (620) is disposed on the top surface of the fixing frame (62), the circuit board (63) is installed in the cavity (620), and the cover plate (64) is mounted on the fixing frame (62) The top surface of the circuit board (63) is fixed in the cavity (620), and the socket (61) is mounted on the top surface of the circuit board (63) and electrically connected to the circuit board (63). The top of (61) projects outwardly from the middle of the cover (64).
A brushless outer rotor motor according to claim 2, wherein said end insulation (12) comprises a ring portion (121) located in the middle and extending outwardly from the ring portion (121). a plurality of teeth (122) are provided with a slot (1221) on an outer edge of each tooth portion (122), and a lug piece (7) is mounted in a part of the slot (1221), and one end of the lug piece (7) Electrically coupled to the coil winding (13), the other end passes through the bottom of the holder (62) and extends into the cavity (620) The circuit boards (63) are electrically connected together.
A brushless outer rotor motor according to claim 3, wherein a semicircular groove (1222) is provided on an outer edge of each of the teeth (122).
A brushless outer rotor motor according to claim 2 or 3 or 4, wherein a Hall element (631) is mounted on the bottom surface of the wiring board (63), and the Hall element (631) is extended. Inside the notch (110) formed by the adjacent two stator teeth in the stator core (11).
A brushless outer rotor motor according to claim 1 or 2 or 3 or 4, characterized in that a bushing (8) is arranged on one side of the cavity (10) and in the middle of the molding body (14). The shaft (3) passes through the middle of the cavity (10) and is nested with the sleeve (8).
A brushless outer rotor motor according to claim 6, wherein said plastically sealed stator further comprises a die-cast sleeve (9), and one end of the die-cast sleeve (9) is nested and mounted on said sleeve The outer side of (8) is sleeved on the inner wall surface of the stator core (11), and the molded body (14) is integrally coupled with the die-cast sleeve (9).
A brushless outer rotor motor according to claim 7, characterized in that an annular step portion (91) is provided on the outer wall of the die-cast sleeve (9), and the end surface of the stator core (11) is supported at On the step portion (91).
A brushless outer rotor motor according to claim 1 or 2 or 3 or 4, wherein a radial heat radiating rib (141) and an outer rotor are disposed on a top surface of the molded body (14). 2) It is flat and a flange (23) is nested outside the outer rotor (2).
A fan comprises a volute (101), a wind wheel (102) and a DC brushless outer rotor motor (103), and an air inlet (1010) and a wind wheel (102) are respectively arranged on both sides of the volute (101). And a DC brushless outer rotor motor (103) is located inside the volute (101), wherein the wind wheel (102) is nested outside the DC brushless outer rotor motor (103), and the DC brushless outer rotor motor (103) The two shaft extension ends are respectively connected to the mounting brackets (104) mounted at the two air inlets (1010) of the volute (101), characterized in that the DC brushless outer rotor motor is A brushless outer rotor motor as claimed in any one of claims 1 to 9.