WO2017067125A1

WO2017067125A1 - Waterproof structure for external rotor motor

Info

Publication number: WO2017067125A1
Application number: PCT/CN2016/075895
Authority: WO
Inventors: 王雄程
Original assignee: 中山大洋电机股份有限公司
Priority date: 2015-10-22
Filing date: 2016-03-08
Publication date: 2017-04-27
Also published as: CN205123466U

Abstract

A waterproof structure for an external rotor motor comprises a rotation shaft (1), an external rotor (2), and a plastic packaged stator (3). The external rotor is sleeved outside the plastic packaged stator. The rotation shaft is mounted in the middle of the plastic packaged stator, and is connected together with the external rotor. A first annular groove (351) is disposed on the periphery of a stator core (31) and the bottom surface of the plastic packaged end plate (35). An annular first guarding ring (4) is disposed on an outer edge of the external rotor close to one end of the plastic packaged end plate. The first guarding ring extends into the first annular groove. The first guarding ring comprises a root (41), a water prevention portion (43), and an oblique portion (42) connected between the root and the water prevention portion. The root is mounted on the outer edge of the external rotor. The oblique portion obliquely extends outwards, and at least partially extends into the first annular groove. The water prevention portion extends from an end portion of the oblique portion into the first annular groove along the axial direction. The waterproof structure has a simple structure and a good waterproof capability, effectively improves the use reliability of the external rotor motor, and prolongs the service life of the external rotor motor.

Description

Waterproof structure of outer rotor motor

Technical field:

The utility model relates to a waterproof structure of an outer rotor motor, belonging to the technical field of motors.

Background technique:

At present, most of the outer rotor motors on the market have poor waterproofing ability, and the matching seal between the outer rotor and the stator is not good enough to be used in a harsh environment. As shown in FIG. 1, when the use environment of the outer rotor motor 100 is outdoors or a room with a lot of moisture, water easily enters the outer rotor motor from the gap 103 between the outer rotor 101 and the molded end plate 102 of the stator. The outer rotor motor is damaged or the life is shortened. If the outer rotor motor is placed horizontally horizontally, the waterproofing ability will be worse.

Summary of the invention:

The purpose of the utility model is to provide a waterproof structure of an outer rotor motor, which has a simple structure and good waterproof capability, effectively improves the reliability of the use of the outer rotor motor and prolongs the service life of the outer rotor motor.

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

The waterproof structure of the outer rotor motor comprises a rotating shaft, an outer rotor and a plastic sealing stator. The outer rotor is sleeved outside the plastic sealing stator. The rotating shaft is installed in the middle of the plastic sealing stator and is connected with the outer rotor. The plastic sealing stator comprises a stator core. End insulation, coil winding and plastic body, the end insulation is mounted on the end face of the stator core, the coil winding is wound around the end insulation, and the plastic body connects the stator core, the end insulation and the coil winding into one body a plastic end plate is disposed on one end of the stator core and the plastic sealing body, and a first annular groove is disposed on a periphery of the stator core and a bottom surface of the plastic sealing end plate, and a ring is disposed on an outer edge of the outer rotor near an end of the plastic end plate a first protection ring, the first protection ring extends into the first annular groove, the first protection ring comprises a root portion, a water blocking portion and an inclined portion connected between the root portion and the water blocking portion, the root portion is installed outside On the outer edge of the rotor end, the inclined portion extends obliquely outward, and at least a portion of the inclined portion projects into the first annular groove, and the water retaining portion starts from the end of the inclined portion in the axial direction The extension extends into the first annular groove.

Forming a second annular groove between the first guard ring and the outer edge of the outer rotor end, in the first ring The bottom wall of the groove is provided with an annular second protection ring, and the second protection ring extends into the second annular groove.

The annular first groove portion is provided on the outer side surface of the second protection ring.

The first stop hook protrudes from the end of the second protection ring toward one side of the water retaining portion.

The annular second groove portion is disposed on the outer edge of the inner side wall and the outer rotor end portion of the second annular groove.

The second stop hook protrudes from one end of the outer rotor toward one side of the second guard ring.

The second protective ring and the plastic end plate are mounted together by injection molding.

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

1) The root is mounted on the outer edge of the end of the outer rotor, the inclined portion extends obliquely outward, and at least a portion of the inclined portion projects into the first annular groove, and the water blocking portion starts from the end of the inclined portion in the axial direction Extending into the first annular groove, the inclined portion forms a first layer of protection. When the outer rotor motor is placed horizontally horizontally, the water is first blocked by the inclined portion so that water can flow along the outer rotor. The outer edge of the flow away, reducing the possibility of water entering the outer rotor motor from the gap between the outer rotor and the plastic end plate, improving the reliability of the outer rotor motor and prolonging the service life of the outer rotor motor;

2) forming a second annular groove between the first protection ring and the outer edge of the outer rotor end, and an annular second protection ring is disposed on the bottom wall of the first annular groove, and the second protection ring extends into The second annular groove is inside, so that the second protection ring forms a second layer of protection. If the water breaks through the first protection ring and enters the gap between the outer rotor and the plastic end plate, the water will flow to the second protection ring. Up and down along the second protection ring without entering the inside of the outer rotor motor, and effectively improving the waterproof effect of the outer rotor motor by providing the second protection ring;

3) an annular first groove portion is arranged on the outer side surface of the second protection ring, thereby improving the waterproof effect of the outer rotor motor, even if the water breaks through the first protection ring and enters the gap between the outer rotor and the plastic end plate, The water also flows into the first groove portion and flows down along the first groove portion, greatly reducing the possibility that water breaks through the second protection ring and enters the inside of the outer rotor motor from the gap between the outer rotor and the plastic end plate;

4) an annular second groove portion is disposed on the outer edge of the inner side wall and the outer rotor end portion of the second annular groove to form a third layer of protection, thereby improving the waterproof effect of the outer rotor motor, even if the water breaks through Second protection The ring enters the gap between the outer rotor and the plastic end plate, and the water also flows into the second groove portion and flows down along the second groove portion, thereby greatly reducing the water breaking through the third layer of protection and from the outer rotor and the plastic end plate. The possibility of a gap between entering the inside of the outer rotor motor.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 is a schematic structural view of a conventional plastic motor;

Figure 2 is a perspective view of the plastic motor in the embodiment;

Figure 3 is a schematic structural view of a plastic motor in the embodiment;

Figure 4 is a partial enlarged view of a portion A of Figure 3;

Figure 5 is a perspective view of the outer rotor in the embodiment;

Figure 6 is a perspective view of the molded stator 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, FIG. 3, FIG. 4, FIG. 5 and FIG. 6, this embodiment is a waterproof structure of an outer rotor motor, comprising a rotating shaft 1, an outer rotor 2, a plastically sealed stator 3, and an outer rotor 2 The sleeve 1 is disposed outside the plastic stator 3, and the rotating shaft 1 is installed in the middle of the plastic stator 3 and is connected with the outer rotor 2. The plastic stator 3 includes a stator core 31, an end insulation 32, a coil winding 33 and a molding body 34. The partial insulation 32 is mounted on the end surface of the stator core 31, and the coil winding 33 is wound around the end insulation 32. The plastic sealing body 34 connects the stator core 31, the end insulation 32 and the coil winding 33 into one body. One end of the iron core 31 and the plastic sealing body 34 are provided with a plastic end plate 35. On the outer periphery of the stator core 31 and the bottom surface of the plastic sealing end plate 35, a first annular groove 351 is disposed, and the outer rotor 2 is adjacent to one end of the plastic end plate 35. An annular first protective ring 4 is disposed on the edge, the first protective ring 4 extends into the first annular groove 351, and the outer rotor 3 is an alternating outer rotor comprising a rotor core and a cast aluminum piece, The first protection ring 4 may be a separate part that is additionally mounted on the cast aluminum piece, or is cast A part that is integrally formed from aluminum.

The first guard ring 4 includes a root portion 41, a water blocking portion 43 and an inclined portion 42 connected between the root portion 41 and the water blocking portion 43. The root portion 41 is mounted on the outer edge of the end portion of the outer rotor 2, and the inclined portion 42 is inclined. The ground extends to the outside, and at least a portion of the inclined portion 42 extends into the first annular groove 351, the water retaining portion 43 extends from the end of the inclined portion 42 in the axial direction and into the first annular groove 351. Thus, the inclined portion 42 forms a first layer of protection. When the outer rotor motor is axially placed horizontally, the water is first blocked by the inclined portion 42 so that water can flow along the outer edge of the outer rotor 2, reducing water. The possibility of entering the inside of the outer rotor motor from the gap between the outer rotor 2 and the plastic end plate 35 improves the reliability of the outer rotor motor and prolongs the service life of the outer rotor motor. Similarly, when the outer rotor motor is axially vertical When it is placed straight, the waterproof principle is the same as that when the outer rotor motor is placed horizontally, and will not be described here.

A second annular groove 20 is formed between the first protection ring 4 and the outer edge of the end of the outer rotor 2, and an annular second protection ring 5 is disposed on the bottom wall of the first annular groove 351, and the second protection ring 5 projects into the second annular groove 20. Thus, the second protection ring 5 forms a second layer of protection. If the water breaks through the first protection ring 4 and enters the gap between the outer rotor 2 and the plastic end plate 35, the water will flow to the second protection ring 5 and It flows down along the second protection ring 5 without entering the inside of the outer rotor motor, and the second protection ring 5 is provided to effectively improve the waterproof effect of the outer rotor motor.

An annular first groove portion 50 is disposed on the outer side surface of the second protection ring 5, and water flowing to the outer side surface of the second protection ring 5 eventually flows into the first groove portion 50 and along the first groove The portion 50 flows downward, greatly reducing the possibility of water breaking through the second guard ring and entering the inside of the outer rotor motor from the gap between the outer rotor and the plastic end plate.

A first stop hook 51 protrudes from an end of the second protection ring 5 toward a side of the water retaining portion 43. The first stop hook 51 can effectively block the water in the first groove portion 50, thereby reducing water breakthrough. The second guard ring and the possibility of entering the inside of the outer rotor motor from the gap between the outer rotor and the plastic end plate.

An annular second groove portion 21 is disposed on the inner side wall of the second annular groove 20 and the outer edge of the outer rotor 2 to form a third layer of protection, even if the water breaks through the second protection ring 5 and enters the outer rotor 2 With the gap between the plastic end plates 35, water also flows into the second groove portion 21 and flows down along the second groove portion 21, greatly reducing water breakthrough through the third layer of protection and from between the outer rotor and the plastic end plate. The possibility of the gap entering the inside of the outer rotor motor.

A second stop hook 22 is protruded from an end of the outer rotor 2 toward a side of the second guard ring 5, and the second stop hook 22 can effectively block the water in the second groove portion 21, thereby reducing water breakthrough. Three layers of protection and from the outside The gap between the rotor and the plastic end plate enters the inside of the outer rotor motor.

The second protection ring 5 and the plastic sealing end plate 35 are assembled by injection molding, and the production process is simple and the structural strength is large.

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

The waterproof structure of the outer rotor motor comprises a rotating shaft (1), an outer rotor (2) and a plastic-sealed stator (3), the outer rotor (2) is sleeved outside the plastic-sealed stator (3), and the rotating shaft (1) is mounted on the plastic-sealed stator (3) intermediate and connected to the outer rotor (2), the molded stator (3) comprising a stator core (31), an end insulation (32), a coil winding (33) and a molding body (34), the end The partial insulation (32) is mounted on the end surface of the stator core (31), the coil winding (33) is wound around the end insulation (32), and the plastic sealing body (34) places the stator core (31) and the end portion The insulating (32) and the coil winding (33) are integrally connected, and a plastic sealing end plate (35) is disposed on one end of the stator core (31) and the molding body (34), and is external to the stator core (31) and plastically sealed end plate. a first annular groove (351) is disposed on a bottom surface of the (35), and an annular first protection ring (4) is disposed on an outer edge of the outer rotor (2) near one end of the plastic sealing end plate (35), the first protection ring (4) extending into the first annular groove (351), characterized in that: the first protection ring (4) comprises a root portion (41), a water blocking portion (43) and a connection to the root portion (41) An inclined portion (42) between the water retaining portions (43), and the root portion (41) is mounted on the outer rotor (2) On the outer edge of the end, the inclined portion (42) extends obliquely outward, and at least a portion of the inclined portion (42) projects into the first annular groove (351), and the water retaining portion (43) is inclined from the inclined portion (43) The end of 42) begins to extend axially into the first annular groove (351).
A waterproof structure for an outer rotor motor according to claim 1, wherein a second annular groove (20) is formed between the first guard ring (4) and the outer edge of the end portion of the outer rotor (2) An annular second protection ring (5) is disposed on the bottom wall of the first annular groove (351), and the second protection ring (5) projects into the second annular groove (20).
A waterproof structure for an outer rotor motor according to claim 2, characterized in that an annular first groove portion (50) is provided on the outer side surface of the second guard ring (5).
A waterproof structure for an outer rotor motor according to claim 3, characterized in that a first stop hook protrudes from an end of the second guard ring (5) toward one side of the water retaining portion (43) 51).
A waterproof structure for an outer rotor motor according to claim 2 or 3 or 4, characterized in that a ring is provided on the inner side wall of the second annular groove (20) and the outer edge of the end portion of the outer rotor (2). First Two groove parts (21).
A waterproof structure for an outer rotor motor according to claim 5, characterized in that a second stop hook (22) protrudes from an end of the outer rotor (2) toward one side of the second guard ring (5). ).
A waterproof structure for an outer rotor motor according to claim 2 or 3 or 4, characterized in that the second protection ring (5) and the plastic end plate (35) are mounted together by injection molding.