TWM585450U - External rotor motor - Google Patents

Abstract

An external rotor motor includes a stator substructure, a first fixing member, a positioning member and a locking member. The stator structure is formed by combining a plurality of stator units with each other. The stator units includes a first stator unit and a second stator unit. The first stator unit has a first through hole. The second stator unit has a second through hole. The first fixing member is disposed on the stator structure. The first fixing member has a third through hole corresponding to the first through hole. The first fixing member further has a fourth through hole corresponding to the second through hole. The positioning member is disposed at the third through hole of the first fixing member and the first through hole of the first stator unit. The locking member is disposed at the fourth through hole of the first fixing member and the second through hole of the second stator unit.

Description

Outer rotor motor

The present invention relates to an outer rotor motor, in particular to an outer rotor motor having a combined stator structure.

A motor is a driving device that generates a magnetic field by energizing a stator coil, thereby driving a rotor provided with a permanent magnet to rotate, and then converting electric energy into kinetic energy. General motors can be roughly divided into inner rotor motors and outer rotor motors. The outer rotor motor is an example. The outer rotor motor surrounds a rotor provided with a permanent magnet on the outside of a circular stator core coil, and fixes the internal stator core coil to rotate the external rotor.

In the conventional full-round stator iron core of a conventional outer rotor motor, a plurality of silicon steel sheets are usually stacked. The manufacturing method of these silicon steel sheets is mainly formed by stamping on a steel coil, and the stator is assembled into a stator. After that, the core teeth of the stator are wound. However, because the space between the two core teeth of a full-circle stator core is quite limited, it increases the difficulty of winding, especially for a small outer rotor motor, which has a higher winding difficulty.

The purpose of the present invention is to provide an outer rotor motor having the advantage of being easy to wind.

In order to achieve the above object, an external rotor motor according to the present invention includes a fixed substructure, a first fixing member, a positioning member, and a locking member. The stator structure is formed by combining a plurality of stator units in pairs. The stator units include a first stator unit and a second stator unit. The first stator unit has a first through hole and the second stator unit has A second through hole. The first fixing member is disposed on the stator structure. The first fixing member has a third through hole corresponding to one of the first through holes, and the first fixing member further has a fourth through hole corresponding to one of the second through holes. The positioning member is disposed in the third through hole of the first fixing member and the first through hole of the first stator unit. The locking member is disposed in the fourth through hole of the first fixing member and the second through hole of the second stator unit.

As mentioned above, in the outer rotor motor according to the present invention, since the stator units can be wound first, the stator structure can be assembled through the first fixing member, the positioning member and the locking member. Limited by the size of the stator structure. Even for small-sized motors, since each stator unit can be wound separately, the difficulty of winding is not high, which makes the rotor motors of the new type have the advantage of easy winding.

In one embodiment, the second fixing member has a protruding portion, and the protruding portion is disposed in the through portion of the stator structure and contacts the stator units, so as to achieve the purpose of shaping and facilitating the assembly of the stator structure. It can also reduce noise and vibration when the outer rotor motor is running.

Hereinafter, the rotor motor according to the embodiment of the present invention will be described with reference to related drawings. The same components will be described with the same reference symbols.

FIG. 1 is a schematic diagram of a stator structure of an external rotor motor according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a stator unit in the stator structure of FIG. 1. FIG. 3 is a part of an external rotor motor according to an embodiment of the present invention. FIG. 4 is an exploded view, FIG. 4 is a combination view of FIG. 3, FIG. 5 is a partial combination view of a rotor motor other than an embodiment of the present invention, and FIG. 6 is a sectional view of an outer rotor motor according to an embodiment of the present invention.

As shown in FIG. 1 to FIG. 4, an outer rotor motor according to an embodiment of the present invention includes a fixed structure 12, a first fixing member 13, at least one positioning member 14, and at least one locking member 15. In addition, the outer rotor motor may further include a fixing base 11 (FIG. 3) and a second fixing member 16 (FIG. 3).

The fixing base 11 is used for fixing the stator structure 12. In some embodiments, the fixing base 11 may be integrally formed with the outer rotor motor casing into a single component; or, in some embodiments, the fixing base 11 may be independent from the outer rotor motor casing as a separate component. The fixing base 11 of this embodiment is an example of an independent component independent of the outer rotor motor housing.

The stator structure 12 is disposed on the fixing base 11. The stator structure 12 is formed by combining a plurality of stator units in pairs (FIG. 1). The stator structure 12 in this embodiment is formed by combining 12 stator units in pairs. The stator units may include a first stator unit 121 and a second stator unit 122. As shown in FIG. 1, the first stator unit 121 has a first through hole h1, and the second stator unit 122 has a first through hole h1.二 通 孔 h2。 Two through holes h2. The structures of the first stator unit 121 and the second stator unit 122 may be the same or different; the first stator unit 121 and the second stator unit 122 may be adjacent or non-adjacent stator units, and their numbers may be For the same or different, the present invention is not limited. FIG. 1 is an example in which the structures of the first stator unit 121 and the second stator unit 122 are the same and are not adjacent to each other. Nevertheless, for the sake of convenience in the following description, the first stator unit 121 and the second stator unit 122 will be referred to hereinafter.

FIG. 2 illustrates the first stator unit 121 as an example (the second stator unit 122 is not shown). As shown in FIG. 2, the first stator unit 121 has an arc-shaped body 1211 and an iron core tooth 1212. Here, the arc-shaped body 1211 has a first side surface P1 and a second side surface P2 opposite to each other, the first side surface P1 has a protruding portion 1213, the second side surface P2 has a groove portion 1214, and the first through hole h1 It extends through the arc-shaped body 1211, and the first through holes h1, the protruding portions 1213, and the recessed portions 1214 extend in the same direction, all parallel to the axial direction of the outer rotor motor. Therefore, the convex portions 1213 of multiple stator units (for example, the plurality of first stator units 121 and the plurality of second stator units 122) are arranged in cooperation with the groove portions 1214 of adjacent stator units, so that 12 stators The units can be combined with each other to form the stator structure 12. Wherein, the arc-shaped bodies 1211 of the 12 stator units can form a through portion H after assembly. In addition, the arc-shaped body 1211 also has an outer peripheral surface 1215 extending from the first side P1 to the second side P2 of the arc-shaped body 1211, and the core teeth 1212 extend from the outer peripheral surface 1215 in an integrally formed outward manner.

In particular, the traditional full-round stator core is usually stacked by a plurality of silicon steel sheets, and the manufacturing method of these silicon steel sheets is mainly formed by stamping on a steel coil. However, steel coils After punching the strip, there will be many scraps left. These scraps usually cannot be punched again. They can only be recycled for reuse, which results in waste of materials and relatively increases the cost of manufacturing a full-round stator core. Because the stator structure 12 of this embodiment is a combination of a plurality of stator units, the area of a stator unit is naturally much smaller than that of a full-circle stator core, and it is not like a full-circle stator core because it has The central circular slot occupies extra space, so when stamping the strip of silicon steel sheet, multiple silicon steel sheets can be punched out to form a stator unit according to the preset stamping position of the stator unit, and then multiple stator units are combined into Compared with the prior art, the stator structure 12 directly stamps the entire full-circle stator core. In this embodiment, the method of forming the stator structure 12 by using a plurality of stator units can also reduce the production of the stator core. Waste, thereby reducing overall manufacturing costs.

As shown in FIG. 3, the first fixing member 13 is disposed on a side of the stator structure 12 away from the fixing base 11, the first fixing member 13 has a third through hole h3 corresponding to the first through hole h1, and the first fixing member 13 There is a fourth through hole h4 corresponding to one of the second through holes h2. Here, the first fixing member 13 has a plurality of third through holes h3 (one-to-one correspondence) each corresponding to the first through hole h1, and has a plurality of fourth through holes h4 each corresponding to the second through hole h2. (One-to-one correspondence). In addition, the second fixing member 16 is disposed on a side of the stator structure 12 away from the first fixing member 13. The second fixing member 16 has a fifth through hole h5 corresponding to one of the first through holes h1. There is a sixth through hole h6 corresponding to one of the second through holes h2. Here, the second fixing member 16 has a plurality of fifth through holes h5 (one-to-one correspondence) each corresponding to the first through hole h1, and has a plurality of sixth through holes h6 each corresponding to the second through hole h2. (One-to-one correspondence). In this embodiment, the first fixing member 13 and the second fixing member 16 are both annular bodies, and are disposed on the upper side and the lower side of the stator structure 12 correspondingly, and are adjacent to the arc-shaped bodies 1211 for fixing. Stator structure 12. In some embodiments, the second fixing member 16 and the fixing base 11 may be integrally formed into a single component.

The positioning member 14 is provided in the third through hole h3 of the first fixing member 13 and the corresponding first through hole h1 of the first stator unit 121; the locking member 15 is provided in the fourth through hole h4 of the first fixing member 13 and corresponding The second through hole h2 of the second stator unit 122 is fixed to the fixing base 11. In this embodiment, the positioning member 14 and the locking member 15 are different components. Here, the positioning member 14 and the locking member 15 are different types or types of components. The positioning member 14 is, for example, but not limited to, a pin, and the locking member 15 is, for example, but not limited to, a screw or a bolt. As shown in FIG. 3, the first through hole passed by the positioning member 14 is marked as h1, the third through hole is marked as h3, the fifth through hole is marked as h5, and the fourth through hole passed by the lock member 15 is marked as h4. The second through hole is labeled h2, and the sixth through hole is labeled h6.

In this embodiment, the number of the positioning member 14 and the locking member 15 is twelve, so that the total amount of the first through hole h1 and the second through hole h2, the total number of the third through hole h3 and the fourth through hole h4, the first The total number of the five through holes h5 and the sixth through hole h6 is 12 each. In addition, the number of the locking members 15 may be less than or equal to the positioning member 14. As shown in FIG. 3, this embodiment includes eight positioning members 14 (corresponding to eight first through holes h1, eight third through holes h3, and eight fifth through holes h5) and four locking members 15 ( Corresponding to 4 second through holes h2, 4 fourth through holes h4 and 4 sixth through holes h6), but it is not limited to this. In different embodiments, the locking member 15 may be, for example, 2 , 3, or 6 (the rest are positioning members 14). In general, the price of the locking member 15 (screw or bolt) is higher, and the price of the positioning member 14 (plug) is lower. Therefore, using fewer locking members 15 and more positioning members 14 can also reduce the overall cost.

The fixing base 11 has seventh through holes h7 respectively corresponding to the fifth through hole h5, and the fixing base 11 further has eighth through holes h8 respectively corresponding to the sixth through hole h6. Among these positioning members 14, at least two positioning members 14 have different lengths. Specifically, it is not necessary that all the positioning members 14 pass through the third through hole h3, the first through hole h1, and pass through the fifth through hole h5 of the second fixing member 16, and then are inserted into the corresponding seventh of the fixing base 11. As long as there is at least one through hole h7 or, for example, two (or four) longer positioning members 14 are inserted into the seventh through hole h7 of the fixing base 11, the positioning function is provided during the assembly process, so that the assembly can be performed. It is relatively easy, and other shorter positioning members 14 only need to pass through the third through hole h3, the first through hole h1 and be inserted into the fifth through hole h5 of the second fixing member 16 (the first corresponding hole of the fixing base 11 does not need to be inserted). Seven through holes h7). Of course, in different embodiments, all the positioning members 14 can be inserted into the seventh through hole h7 corresponding to the fixing base 11. In addition, the number of the locking members 15 in this embodiment is four, and the four locking members 15 all pass through the fourth through hole h4, the second through hole h2 and the sixth through hole h6 corresponding to the second fixing member 16, and It is locked into the eighth through hole h8 corresponding to the fixing base 11, and the first fixing piece 13, the stator units, and the second fixing piece 16 are sequentially fixed on the fixing base 11 through the locking member 15 (FIG. 4). .

In some embodiments, the materials of the first fixing member 13, the second fixing member 16, the positioning member 14 and the locking member 15 may be made of metal or plastic, or other materials having a certain structural strength. In some embodiments, in order to allow the positioning member 14 (pin) to pass through, the cross-sectional shape of the third through hole h3, the first through hole h1, the fifth through hole h5, and the seventh through hole h7 inserted by the positioning member 14 may be Is circular or polygonal (e.g. triangle, quadrilateral, ...). In order to allow the locking member 15 (screw or bolt) to pass through, the cross-sectional shapes of the fourth through hole h4, the second through hole h2, the sixth through hole h6, and the eighth through hole h8 inserted by the locking member 15 may be circular. In addition, if the cross-sectional shape of the positioning member 14 and the locking member 15 are different, for example, when the cross-sectional shape of the positioning member 14 is a quadrangle and the cross-sectional shape of the locking member 15 is circular, the third through hole h3 A through-hole h1 and a fifth through-hole h5 have different cross-sectional shapes from the fourth through-hole h4, the second through-hole h2, and the sixth through-hole h6 through which the locking member 15 passes. In other words, if the sectional shapes of the positioning member 14 and the locking member 15 are different, the sectional shapes of the third through hole h3 and the fourth through hole h4 are different, and the sectional shapes of the first through hole h1 and the second through hole h2 are different. The cross-sectional shapes of the fifth through hole h5 and the sixth through hole h6 are also different.

As shown in FIG. 5, the outer rotor motor further includes a plurality of coils 17, and each coil 17 is correspondingly wound around each stator unit. In addition, as shown in FIG. 6, the rotor motor 1 in this embodiment may further include a rotor structure 18, which is sleeved on the stator structure 12 and is disposed corresponding to the stator structure 12. The rotor structure 18 of this embodiment has a rotating shaft 181, a housing 182, and a magnetic body 183. Among them, the rotor structure 18 is provided on the stator structure 12 through the rotating shaft 181 and is provided corresponding to the stator structure 12. The material of the rotating shaft 181 may be a magnetic material or a non-magnetic material, and is not limited. The housing 182 is connected to the rotating shaft 181 and the magnetic body 183, respectively, and is arranged on the stator structure 12, and the magnetic body 183 is provided on the side of the housing 182 facing the stator structure 12, and the housing 182 can be embedded, clamped or bonded to the rotating shaft. 181 links are not limited. The magnetic body 183 may be, for example, a permanent magnet, and is provided on an inner wall of the housing 182 and faces the stator structure 12 and is provided corresponding to the stator structure 12. The material of the magnetic body 183 may include, for example, ferrite, ferrite soft magnetic, magnetically permeable high alloy, magnetically permeable substance, or a combination thereof, and is not limited thereto.

Therefore, when the coil 17 on the stator structure 12 of the outer rotor motor 1 is energized to generate a magnetic field, it can generate an electromagnetic effect with the magnetic body 183 of the rotor structure 18, thereby driving the rotor structure 18 to rotate.

It is further mentioned that the rotor motor 1 other than the embodiment of FIG. 6 can be applied to, for example, but not limited to, an electric bicycle, an electric cart, an electric golf cart, or an electric water vehicle (such as a water electric pedal boat, such as a swan boat) ), This model is not limited.

In some embodiments, the method of assembling the outer rotor motor 1 may include the following steps: first, winding each stator unit separately to obtain a plurality of stator units having a coil 17, and then assembling the stator units to The combined stator structure 12 is obtained, and then the coils 17 on the stator units are connected according to the requirements of the motor speed (for example, the speed of a 4-pole motor is 1800 RPM), and then at least one positioning member 14 is used to pass through them sequentially. The third through-hole h3 of the first fixing member 13, the first through-hole h1 of the stator structure 12 and the fifth through-hole h5 of the second fixing member 16 are used for assembly and positioning. Pass through the fourth through hole h4 of the first fixing member 13, the second through hole h2 of the stator structure 12 and the sixth through hole h6 of the second fixing member 16, and finally, set corresponding to the rotor structure 18 to assemble the outer Rotor motor 1.

It is assumed that, in the rotor motor 1 other than the present embodiment, since the stator units 12 can be wound first, the stator structure 12 can be assembled through the first fixing member 13, the positioning member 14 and the locking member 15. The wire may not be limited to the size of the stator structure 12. In other words, even for a small-sized motor, since each stator unit is wound separately, the difficulty of winding is not high, so that the outer rotor motor 1 has the advantage of being easily wound. In addition, since the stator structure 12 is assembled by using the positioning member 14 and then the fastener 15 is used, the outer rotor motor 1 is also easy to assemble. In addition, because the positioning member 14 (plug) is used for assembly in this embodiment, it has a lighter weight and lower cost than the entire assembly using locks (such as screws or bolts). Advantage (because the weight and cost of the bolt are lower than screws or bolts).

Please refer to FIG. 7, which is a partially exploded schematic diagram of an outer rotor motor according to another embodiment of the present invention. This embodiment is substantially the same as the rotor motor 1 (refer to FIG. 3) other than the above-mentioned embodiment. The main difference from the outer rotor motor 1 is that, in addition to the fifth through hole h5 and the sixth through hole h6, the second fixing member 16a of this embodiment further has a protruding portion 161 on the inner side, and the protruding portion 161 is provided on the stator. Inside the through portion H of the structure 12 (see FIG. 1). The protruding portion 161 of this embodiment is annular and protrudes toward the penetrating portion H, is disposed in the penetrating portion H, and contacts the stator units. Here, due to manufacturing tolerances and assembly errors, noise and vibration may occur during the operation of the outer rotor motor. In this embodiment, the second fixing member 16 has a protruding portion 161, and the protruding portion 161 is disposed in the through portion H to contact the stator. The design of the curved body 1211 of the unit can achieve the purpose of shaping and making the assembly of the stator structure 12 more convenient, and can also reduce the noise and vibration during the operation of the outer rotor motor.

In addition, the total of the positioning member 14 and the locking member 15 in the embodiment of FIG. 7 is the same as that of the above embodiment (a total of 12 pieces), but there are 9 positioning members 14 and 3 pieces of the locking member 15 in this embodiment, which are the same as the foregoing The examples are different (the corresponding number and position of the through holes are also different from the foregoing embodiments).

To sum up, in the new type outer rotor motor, since the stator units can be wound first, the stator structure can be assembled through the first fixing member, the positioning member and the locking member, so the winding can be freed from Limited to the size of the stator structure. Even for small-sized motors, since each stator unit can be wound separately, the difficulty of winding is not high, which makes the rotor motors of the new type have the advantage of easy winding.

In one embodiment, the second fixing member has a protruding portion, and the protruding portion is disposed in the through portion of the stator structure and contacts the stator units, so as to achieve the purpose of shaping and facilitating the assembly of the stator structure. It can also reduce noise and vibration when the outer rotor motor is running.

The above description is exemplary only, and not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the new model shall be included in the scope of the attached patent application.

1‧‧‧ Outer rotor motor
11‧‧‧Fixed
12‧‧‧ stator structure
121‧‧‧First stator unit
122‧‧‧Second stator unit
1211‧‧‧arc body
1212‧‧‧Core teeth
1213‧‧‧ protrusion
1214‧‧‧Groove
1215‧‧‧outer surface
13‧‧‧First Fixing
14‧‧‧ Positioning piece
15‧‧‧Lock Firmware
16, 16a‧‧‧Second Fixing
161‧‧‧ protrusion
17‧‧‧coil
18‧‧‧rotor structure
181‧‧‧Shaft
182‧‧‧Shell
183‧‧‧ Magnetic body
H‧‧‧through
h1‧‧‧First through hole
h2‧‧‧Second through hole
h3‧‧‧Third through hole
h4‧‧‧Fourth through hole
h5‧‧‧Fifth through hole
h6‧‧‧Sixth through hole
h7‧‧‧Seventh through hole
h8‧‧‧Eighth through hole
P1‧‧‧First side
P2‧‧‧Second Side

FIG. 1 is a schematic diagram of a stator structure of an outer rotor motor according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a stator unit in the stator structure of FIG. 1.
FIG. 3 is a partially exploded schematic view of an outer rotor motor according to an embodiment of the present invention.
FIG. 4 is a schematic combination view of FIG. 3.
FIG. 5 is a partial combination diagram of a rotor motor other than an embodiment of the present invention.
FIG. 6 is a schematic cross-sectional view of an outer rotor motor according to an embodiment of the present invention.
FIG. 7 is a partial exploded view of an outer rotor motor according to another embodiment of the present invention.

Claims (10)

An outer rotor motor includes:
A certain sub-structure, which is formed by combining a plurality of stator units in pairs. The stator units include a first stator unit and a second stator unit. The first stator unit has a first through hole. The second stator unit has a second through hole;
A first fixing member is disposed on the stator structure. The first fixing member has a third through hole corresponding to one of the first through holes, and the first fixing member has a fourth through hole corresponding to one of the second through holes. hole;
A positioning member is provided in the third through hole of the first fixing member and the first through hole of the first stator unit; and a locking member is provided in the fourth through hole of the first fixing member and The second through hole of the second stator unit. The outer rotor motor according to item 1 of the patent application scope, wherein the first stator unit has an arc-shaped body, the arc-shaped body has a first side and a second side opposite to each other, and the first side has a A convex portion, the second side surface has a groove portion, and the convex portion of the first stator unit is provided in cooperation with the groove portion of an adjacent stator unit. The outer rotor motor according to item 1 of the scope of the patent application, wherein the number of the positioning members is multiple, and the two positioning members have different lengths. The outer rotor motor according to item 1 of the patent application scope, wherein the positioning member and the locking member are different components. The outer rotor motor according to item 1 of the scope of the patent application, wherein the cross-sectional shape of the first through-hole and the second through-hole are different; and the cross-sectional shape of the third through-hole and the fourth through-hole are different. Rotor motors other than those described in the first patent application scope, including:
A fixing base, the stator structure is arranged on the fixing base, and the locking member is locked on the fixing base. Rotor motors as described in item 6 of the scope of patent application, including:
A second fixing member is disposed on a side of the stator structure away from the first fixing member, the second fixing member has a fifth through hole corresponding to the first through hole, and the positioning member is further provided on the fifth through hole. Through-hole. The outer rotor motor according to item 7 of the scope of patent application, wherein the second fixing member further has a sixth through hole corresponding to one of the second through holes, and the locking member is further provided in the sixth through hole and locks. It is fixed to the fixing seat. The outer rotor motor according to item 7 of the patent application scope, wherein the second fixing member further has a protruding portion, and the stator structure has a penetrating portion, the protruding portion is disposed in the penetrating portion and contacts the stator units. Rotor motors other than those described in the first patent application scope, including:
A rotor structure is provided corresponding to the stator structure. The rotor structure has a casing and a magnetic body. The casing is disposed on the stator structure, and the magnetic body is disposed on a side of the casing facing the stator structure.