Patent Description:
A conventional motor includes a stator and a rotor. The stator is assembled on a casing of the motor. The stator includes a plurality of iron cores and a coil unit. Each iron core is integrally formed by pressing to form an annular member. The coil unit is wound around the plurality of iron cores forming the annular member. Each iron core includes a magnetic yoke and a pole shoe. Each two adjacent magnetic yokes are connected with each other. Each two adjacent pole shoes have a spacing therebetween. The rotor is rotatably mounted in a space delimited by the pole shoes. An air gap is formed between an outer periphery of the rotor and the pole shoes of the stator, so that the rotor can rotate smoothly relative to the stator.

In the above conventional motor, since each iron core is integrally formed by pressing to form an annular member, after the coil unit is wound around each iron core, the iron cores wound by the coil units are assembled to the casing. However, if the size of the above conventional motor is larger, the size of the mold for the integrally formed iron cores will also be large, resulting in higher costs for the iron core mold. Furthermore, manufacturing is not easy, as wire winding of the integrally formed iron cores is required. Moreover, after the above conventional motor has been used for a period of time, when the stator and the casing become locally loose after long-term operation of the motor, the iron cores which form an annular member as a whole must be adjusted and assembled again. Alternatively, in a case that any one of the coil units of the stator is damaged, the iron cores which form an annular member as a whole must be detached in order to remove the damaged coil unit from the iron cores, resulting in inconvenience in assembly and disassembly.

Thus, it is necessary to improve the conventional motor.

<CIT> discloses wind power generation systems having a segmented stator with a structural element and a plurality of coils. The wind power generation systems also include a rotor adapted to be rotated by wind to induce current in the plurality of coils and a lamination stack having a plurality of lamination plates disposed about the plurality of coils and a dovetail recess formed in the lamination stack. The wind power generation systems also include a dovetail bar adapted to be received by the dovetail recess.

<CIT> discloses a dynamoelectric machine stator assembly providing a structural configuration for connecting stator lamination sectors to the stator frame. A keybar has a dovetail portion provided on one end thereof. Each of plurality of lamination sectors has dovetail slot (<NUM>) recessed therefrom and shaped to mate with the dovetail portion of said keybar.

<CIT> discloses a motor. A stator of the motor includes a plurality of split cores configured to cooperatively define a ring shape. Support rings of the motor are configured to surround outer circumferential surfaces of the split cores and to support upper and lower surfaces of the split cores, thereby improving stability and reliability. Fixing protrusions provided on the support rings are accommodated in fixing holes provided on the split cores.

<CIT> Al discloses an electrical machine including a stator and a housing. The housing has an internal bore. The stator includes an annular core mounted within the bore of the housing. The core includes at least one key projecting radially outwardly from a radially outer surface thereof. The housing includes at least one keyway in the bore. The at least one key of the core being received within the at least one keyway of the housing. Retaining elements are mounted to the housing by threaded fasteners which are received in circumferentially spaced threaded bores formed in the axial end surface of the housing.

To solve the above problem, it is an objective of the present invention to provide a motor which permits removal of a single magnetic pole module for replacement or maintenance while permitting easy assembly and disassembly.

It is another objective of the present invention to provide a motor which can reduce the manufacturing costs.

It is a further objective of the present invention to provide a motor which permits stable coupling between the stator and the casing.

It is still another objective of the present invention to provide a motor which permits easy removal of the magnetic pole modules.

As used herein, the term "a", "an" or "one" for describing the number of the elements and members of the present invention is used for convenience, provides the general meaning of the scope of the present invention, and should be interpreted to include one or at least one. Furthermore, unless explicitly indicated otherwise, the concept of a single component also includes the case of plural components.

As used herein, the term "engagement", "coupling", "assembly", or similar terms is used to include separation of connected members without destroying the members after connection or inseparable connection of the members after connection. A person having ordinary skill in the art would be able to select according to desired demands in the material or assembly of the members to be connected.

A motor according to the present invention includes a casing, a stator, and a rotor. The casing includes an inner periphery having a plurality of first assembling structures. The stator is disposed on the casing and includes a plurality of magnetic pole modules each of which is independently separable. Each of the plurality of magnetic pole modules includes at least one second assembling structure. Each second assembling structure is detachably coupled in an axial direction to an associated one of the plurality of first assembling structures. The rotor is rotatably disposed within the stator. An air gap is formed between the rotor and the stator.

Thus, in the motor according to the present invention, the stator includes a plurality of independently separable magnetic pole modules each having at least one second assembling structure. Each magnetic pole module may be axially and detachably coupled to the casing by coupling each second assembling structure to an associated first assembling structure of the casing. When one of the plurality of magnetic pole modules of the stator is damaged, the damaged magnetic pole module may be removed alone for replacement or maintenance. After maintenance, by the provision of each second assembling structure and the associated first assembling structure, the repaired magnetic pole module can be easily reassembled to the casing, which may avoid adverse influence on the arrangement of the other magnetic pole modules near the repaired magnetic pole module, permitting easy assembly and disassembly.

In an example, each of the plurality of magnetic pole modules may include an outer face and an inner face. Each outer face may be adjacent to an associated one of the plurality of first assembling structures. Each inner face may be remote from the associated first assembling structure. Thus, the second assembling structures of the plurality of magnetic pole modules can be easily coupled with the plurality of first assembling structures, which is convenient in assembly.

In an example, each of the plurality of first assembling structures may include a post having two axial end faces opposite to each other. The post of each of the plurality of first assembling structures may include two guiding grooves extending through the two axial end faces. Each second assembling structure may include a protrusion which can be engaged with an associated one of the two guiding grooves of an associated first assembling structure. Thus, each of the plurality of magnetic pole modules can be assembled between two adjacent first assembling structures, which is convenient in assembly.

In an example, the post of each of the plurality of first assembling structures may include two engaging holes respectively recessed from the two axial end faces. The two engaging holes may be located between the two guiding grooves. The two engaging holes are configured to be installed with corresponding fixing units to couple the plurality of magnetic pole modules to the casing. Thus, the structure is simple and easy to manufacture, thereby reducing the manufacturing costs.

In an example, the casing may include a first casing part formed of a plurality of arcuate blocks connected to each other. The plurality of arcuate blocks may together tightly clamp the plurality of magnetic pole modules of the stator. Thus, the plurality of magnetic pole modules can avoid from becoming loose, such that the plurality of magnetic pole modules of the stator can be stably coupled.

In an example, each of the plurality of arcuate blocks may include two lugs. Each of the two lugs of each of the plurality of arcuate blocks is aligned with one of the two lugs of an adjacent arcuate block. Each pair of aligned lugs is coupled by a fastening unit. Thus, the structure is simple and easy to assemble.

In an example, each of the plurality of first assembling structures may include two channels and a limiting column formed between the two channels. Each second assembling structure may include two hooked columns and a limiting groove formed between the two hooked columns. The two hooked columns may engage with the two channels. The limiting column may engage with the limiting groove. Thus, by the provision of the second assembling structures, each of the plurality of magnetic pole modules can be detachably coupled between two adjacent first assembling structures in the axial direction, which is convenient in assembly.

In an example, the casing includes a first casing part and a second casing part configured to be coupled with the first casing part to jointly envelope the stator. Each of the plurality of first assembling structures may include a slot and a pin. The pins may be disposed on the first casing part and the second casing part of the casing. Each second assembling structure may include a hollow column. Each hollow column may be aligned with an associated pin. Thus, during assembly, the hollow column of each second assembling structure axially engages with an associated pin of the first casing part aligned with the hollow column. Then, the pins of the second casing part axially engage with the hollow columns of the second assembling structures aligned with the pins, such that the pins respectively extend into the hollow columns of the second assembling structures, thereby stably coupling the casing with the stator.

In an example, each pin located on the first casing part may be received in an associated slot. Thus, the structure is simple and easy to manufacture, thereby reducing the manufacturing costs.

In an example, each pin located on the first casing part may include an end connected to the first casing part and another end facing the second casing part. Each pin located on the second casing part may include an end connected to the second casing part and another end facing the first casing part. Thus, the structure is simple and easy to manufacture, thereby reducing the manufacturing costs.

In an example, the motor may further include a plurality of fixing units axially coupled with the casing and the stator. Thus, the plurality of magnetic pole modules can be stably coupled to the casing, such that the stator and the casing can be stably coupled.

In an example, each of the plurality of fixing units may include a pressing member and a positioning member. Each pressing member may include a padding portion and two pressing portions. The two pressing portions are connected to the padding portion and press against an upper face or a lower face of an associated second assembling structure. The positioning member may extend through the padding portion and engage with an engaging hole of an associated one of the plurality of first assembling structures. Thus, it is assured that the plurality of magnetic pole modules can be stably coupled with the casing to effectively prevent the plurality of magnetic pole modules from displacing relative to or falling from the casing.

In an example, each of the plurality of fixing units may include a pressing member and a positioning member. Each pressing member may include a padding board portion and a pressing board portion. A connecting board may be connected between the padding board portion and the pressing board portion. Each pressing board portion presses against an upper face or a lower face of an associated second assembling structure. The positioning member may extend through the padding board portion and engage with a mounting hole of the casing. Thus, it is assured that the plurality of magnetic pole modules can be stably coupled with the casing to effectively prevent the plurality of magnetic pole modules from displacing relative to or falling from the casing.

In an example, the motor may further include a plurality of fasteners. The plurality of fasteners may extend through the casing and press against the plurality of magnetic pole modules, respectively. Thus, after assembly, the stator will not rotate relative to the casing to effectively prevent the plurality of magnetic pole modules from displacing relative to or falling from the casing.

In an example, the casing may include a plurality of radial through-holes. The plurality of fasteners may extend through and engage with the plurality of radial through-holes, respectively. Thus, the structure is simple and easy to manufacture, thereby reducing the manufacturing costs.

The motor further includes a plurality of blocks. Each of the plurality of blocks is disposed on an associated one of the plurality of magnetic pole modules. A push member extends through a through-hole of the casing and is configured to push one of the plurality of blocks. Thus, the plurality of magnetic pole modules can be removed from the casing in the axial direction, thereby permitting easy removal of the plurality of magnetic pole modules.

Each of the plurality of magnetic pole modules includes a plurality of receiving pits respectively located on an upper face and/or a lower face of the associated magnetic pole module. Each of the plurality of blocks is located in one of the plurality of receiving pits. Thus, the push member can push the block from above or below, thereby permitting easy disassembly.

The present invention will become more fully understood from the detailed description given hereinafter and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:.

When the terms "front", "rear", "left", "right", "up", "down", "top", "bottom", "inner", "outer", "side", and similar terms are used herein, it should be understood that these terms have reference only to the structure shown in the drawings as it would appear to a person viewing the drawings and are utilized only to facilitate describing the invention, rather than restricting the invention.

With reference to <FIG>, a motor of a first embodiment according to the present invention includes a casing <NUM>, a stator <NUM>, and a rotor <NUM>. The stator <NUM> is disposed on the casing <NUM>. The rotor <NUM> is rotatably disposed within the stator <NUM>.

With reference to <FIG> and <FIG>, the casing <NUM> may include a first casing part 1a and a second casing part 1b. The second casing part 1b may be coupled with the first casing part 1a to jointly envelope the stator <NUM>. The coupling between the first casing part 1a and the second casing part 1b may be buckling, threading connection, welding, etc. The present invention is not limited in this regard. The casing <NUM> may include an axial hole H which may be located on the second casing part 1b. An inner periphery N of the casing <NUM> includes a plurality of first assembling structures <NUM> which may be located on the first casing part 1a. The plurality of first assembling structures <NUM> is spaced from each other and extends in an axial direction of the axial hole H. Each of the plurality of first assembling structures <NUM> may include a post 11a which may protrude from the inner periphery N of the casing <NUM>. Each of the plurality of first assembling structures <NUM> may include two axial end faces 11b opposite to each other. The two axial end faces 11b are respectively located on top and bottom faces of the post 11a. The post 11a of each of the plurality of first assembling structures <NUM> includes two guiding grooves 11c extending through the two axial end faces 11b. The post 11a of each of the plurality of first assembling structures <NUM> may further include two engaging holes 11d. The two engaging holes 11d may be respectively formed on the two axial end faces 11b and may or may not intercommunicate with each other. The present invention is not limited in this regard. In this embodiment, the two engaging holes 11d may extend through the two axial end faces 11b, such that the two engaging holes 11d intercommunicate with each other. Furthermore, the two engaging holes 11d may be located between the two guiding grooves 11c.

With reference to <FIG>, <FIG>, and <FIG>, the case <NUM> may include a plurality of radial through-holes <NUM> located on the first casing part 1a. Each of the plurality of radial through-holes <NUM> may be located between two adjacent first assembling structures <NUM>. The casing <NUM> includes a plurality of through-holes <NUM>. The plurality of through-holes <NUM> may be located on the first casing part 1a and the second casing part 1b, respectively. In this embodiment, each of the plurality of through-holes <NUM> is in the form of a screw hole for purpose of explanation.

With reference to <FIG>, the stator <NUM> may include a plurality of magnetic pole modules 2a each of which can be independently separated. The motor may include plural-phase coils. As an example, the motor of this embodiment is a three-phase motor. Each of the plurality of magnetic pole modules 2a may include three-phase winding coils (not shown). Each of the plurality of magnetic pole modules 2a includes an outer face F1 and an inner face F2. Each outer face F1 is the face adjacent to an associated one of the plurality of first assembling structures <NUM>. Each inner face F2 is the face remote from the associated first assembling structure <NUM>. Each of the plurality of magnetic pole modules 2a includes an upper face F3 and a lower face F4 opposite to the upper face F3. Each of the plurality of magnetic pole modules 2a includes at least one second assembling structure <NUM>. In this embodiment, each of the plurality of magnetic pole modules 2a includes two second assembling structures <NUM> respectively located on two sides of the magnetic pole module 2a. The two second assembling structures <NUM> are located between the outer face F1 and the inner face F2 and are nearer to the outer face F1. The two second assembling structures <NUM> are respectively aligned with two adjacent first assembling structures <NUM>. Each second assembling structure <NUM> is detachably coupled to the two adjacent first assembling structures <NUM> in the axial direction. In this embodiment, each second assembling structure <NUM> may include a protrusion 21a which may be engaged with an associated one of the two guiding grooves 11c of an associated first assembling structure <NUM>, such that the associated magnetic pole module 2a may be assembled between two adjacent first assembling structures <NUM>. Furthermore, each of the plurality of magnetic pole modules 2a includes a plurality of receiving pits <NUM> respectively located on the upper face F3 and/or the lower face F4. The plurality of receiving pits <NUM> on the same magnetic pole module 2a are located between the two second assembling structures <NUM>, and the plurality of receiving pits <NUM> are aligned with the plurality of through-holes <NUM> of the casing <NUM>, respectively.

With reference to <FIG>, <FIG>, and <FIG>, the rotor <NUM> may include a shaft <NUM> and a magnet portion <NUM>. An end of the shaft <NUM> passes through the axial hole H of the casing <NUM> and extends beyond the second casing part 1b. The magnet portion <NUM> is disposed around the shaft <NUM>. The magnet portion <NUM> may be, e.g., coupled to the shaft <NUM> via a base, and the base includes a plurality of annularly disposed magnets, or any other equivalent structures. The present invention is not limited in this regard. The magnet portion <NUM> of the rotor <NUM> and the inner face F2 of the plurality of magnetic pole modules 2a of the stator <NUM> have an air gap G formed therebetween. Thus, the magnet portion <NUM> may proceed with magnetic induction with the plurality of magnetic pole modules 2a to drive the shaft <NUM> to rotate relative to the stator <NUM>.

With reference to <FIG> and <FIG>, the motor according to the present invention further includes a plurality of fixing units <NUM> axially coupled with the casing <NUM> and the stator <NUM>. Each of the plurality of fixing units <NUM> may include a pressing member <NUM> and a positioning member <NUM>. Each pressing member <NUM> may include a padding portion <NUM> and two pressing portions <NUM>. Each padding portion <NUM> may be coupled with one of the two axial end faces 11b of an associated first assembling structure <NUM>. In this embodiment, the padding portion <NUM> does not abut the axial end face 11b of the first assembling structure <NUM>. In another embodiment, the padding portion <NUM> may abut an associated axial end face 11b of the first assembling structure <NUM>. The two pressing portions <NUM> are connected to the padding portion <NUM>, extend into the two guiding grooves 11c of the first assembling structure <NUM>, and press against an upper face F3 or a lower face F4 of an associated second assembling structure <NUM>. The positioning member <NUM> extends through the padding portion <NUM> and engages with an engaging hole 11d of an associated first assembling assembly <NUM>, such that the plurality of magnetic pole modules 2a can be stably coupled with the casing <NUM>, thereby effectively preventing the plurality of magnetic pole modules 2a from displacing relative or falling from the casing <NUM>.

With reference to <FIG> and <FIG>, the motor according to the present invention may further comprise a plurality of fasteners <NUM>. The plurality of fasteners <NUM> respectively extends through the plurality of radial through-holes <NUM> of the casing <NUM>. The plurality of fasteners <NUM> may be in threading connection with the plurality of radial through-holes <NUM>. Furthermore, the plurality of fasteners <NUM> may press against the outer faces F1 of the plurality of magnetic pole modules 2a, respectively, such that the plurality of magnetic pole modules 2a may be stably coupled with the casing <NUM>. As a result, the stator <NUM> after assembly will not rotate relative to the casing <NUM>, thereby effectively preventing the plurality of magnetic pole modules 2a from displacing relative to or falling from the casing <NUM>.

With reference to <FIG> and <FIG>, the motor according to the present invention further includes a plurality of blocks <NUM>. Each of the plurality of blocks <NUM> may be made of metal. Each of the plurality of blocks <NUM> is located in one of the plurality of receiving pits <NUM> of an associated magnetic pole module 2a, such that the plurality of blocks <NUM> are aligned with the plurality of through-holes <NUM>, respectively. Each of the plurality of blocks <NUM> may be engaged in an associated receiving pit <NUM> by integral molding injection to permit easy manufacturing. Therefore, a push member T is adapted for being used to extend through one of the plurality of through-holes <NUM> of the casing <NUM> and to push one of the plurality of blocks <NUM>, such that the associated magnetic pole module 2a may displace axially relative to the casing <NUM> to permit removal of the magnetic pole module 2a, which permits easy maintenance or replacement of the magnetic pole module 2a. It is particularly noted that each push member T may be in the form of a screw to be in threading connection with the associated through-hole <NUM>, permitting the push member T to easily push the associated push block <NUM>.

With reference to <FIG> and <FIG>, when the stator <NUM> is energized, the plurality of magnetic pole modules 2a of the stator <NUM> and the magnetic portion <NUM> form repulsive magnetic poles to drive the rotor <NUM> to rotate. After the motor according to the present invention has been used for a period of time, since the stator <NUM> includes a plurality of independently separable magnetic pole modules 2a and since each second assembling structure <NUM> is detachably coupled to an associated one of the plurality of first assembling structures <NUM> in the axial direction, when one of the plurality of magnetic pole modules 2a of the stator <NUM> is damaged, the damaged magnetic pole module 2a can be removed alone, and replacement or maintenance can be achieved by simply removing the coil unit (not shown) on the damaged magnetic pole unit 2a. After maintenance, the repaired magnetic pole module 2a is remounted to the casing <NUM>. By the provision of each second assembling structure <NUM> detachably coupled to an associated first assembling structure <NUM> in the axial direction, adverse influence on the size and location of the magnetic pole modules 2a near the repaired magnetic pole module 2a can be avoided, permitting easy assembly and disassembly.

Please refer to <FIG> showing a motor of a second embodiment according to the present invention. The second embodiment of the present invention is substantially the same as the first embodiment. In the second embodiment, the casing <NUM> includes a first casing part 1a formed of a plurality of arcuate blocks <NUM> connected to each other. Each of the plurality of arcuate blocks <NUM> includes two lugs <NUM>. Each of the two lugs <NUM> of each of the plurality of arcuate blocks <NUM> is aligned with one of the two lugs <NUM> of an adjacent arcuate block <NUM>. Each pair of aligned lugs <NUM> is coupled by a fastening unit <NUM>. Thus, the plurality of arcuate blocks <NUM> may together tightly clamp the plurality of magnetic pole modules 2a of the stator <NUM>, further avoiding the plurality of magnetic pole modules 2a from becoming loose.

Please refer to <FIG> showing a motor of a third embodiment according to the present invention. The third embodiment of the present invention is substantially the same as the first embodiment. In the third embodiment, each of the plurality of first assembling structures <NUM> may include two channels 11e which may be recessed in the inner periphery N of the casing <NUM>. A limiting column 11f may be formed between the two channels 11e. Each limiting column 11f may be substantially T-shaped. Furthermore, each second assembling structure <NUM> of the stator <NUM> may be formed on the outer face F1 of the associated magnetic pole module 2a. Each second assembling structure <NUM> may include two hooked columns 21b which may protrude beyond the outer face F1. A limiting groove 21c may be formed between the two hooked columns 21b. The two hooked columns 21b may engage with the two channels 11e of an associated first assembling structure <NUM>. The limiting column 11f may engage with the limiting groove 21c of an associated second assembling structure <NUM>. Therefore, each of the plurality of magnetic pole modules 2a may be axially and detachably coupled to two adjacent first assembling structures <NUM> by the two second assembling structures <NUM>. As a result, by providing each second assembling structure <NUM> axially and detachably coupled to an associated first assembling structure <NUM>, when one of the plurality of magnetic pole modules 2a of the stator <NUM> is damaged, the damaged magnetic pole module 2a may be removed alone for replacement or maintenance.

Furthermore, each pressing member <NUM> may include a padding board portion <NUM> and a pressing board portion <NUM>. A connecting board <NUM> is connected between the padding board portion <NUM> and the pressing board portion <NUM>. In this embodiment, the pressing member <NUM> may be in the form of a Z-shaped piece. Each padding board portion <NUM> may engage one of the two axial end faces 11b of an associated first assembling structure <NUM>. In this embodiment, each padding board portion <NUM> abuts an axial end face 11b of an associated first assembling structure <NUM> for purpose of explanation. In another embodiment, each padding board portion <NUM> may not abut the axial end face 11b of the associated first assembling structure <NUM>. Each pressing board portion <NUM> may press against an upper face F3 or a lower face F4 of an associated second assembling structure <NUM>. The positioning member <NUM> may extend through the padding board portion <NUM> and engage with a mounting hole <NUM> of the casing <NUM>, such that the plurality of magnetic pole modules 2a can be stably coupled to the casing <NUM>, thereby effectively preventing the plurality of magnetic pole modules 2a from displacing relative to or falling from the casing <NUM>.

Please refer to <FIG> showing a motor of a fourth embodiment according to the present invention. The fourth embodiment of the present invention is substantially the same as the third embodiment. In the fourth embodiment, each of the plurality of first assembling structures <NUM> may include a slot <NUM> and a pin <NUM>. Each slot <NUM> may be recessed in the inner periphery N of the casing <NUM>. The pins <NUM> may be disposed on the first casing part 1a and the second casing part 1b. Each pin <NUM> located on the first casing part 1a includes an end connected to the first casing part 1a and another end facing the second casing part 1b. Each pin <NUM> on the first casing part 1a is located in an associated slot <NUM>. Furthermore, each pin <NUM> located on the second casing part 1b includes an end connected to the second casing part 1b and another end facing the first casing part 1a. Moreover, the pins <NUM> on the first casing part 1a are misaligned from the pins <NUM> on the second casing part 1b. Each second assembling structure <NUM> of the stator <NUM> is located on the outer face F1 of an associated magnetic pole module 2a. Each second assembling structure <NUM> may include a hollow column 21d. Each hollow column 21d may be aligned with an associated pin <NUM>. In assembly, the hollow column 21d of the second assembling structure <NUM> is axially coupled with a pin <NUM> of the first casing part 1a aligned with the hollow column 21d. Then, the pin <NUM> of the second casing part 1b is axially coupled with a hollow column 21d of the second assembling structure <NUM> aligned with the pin <NUM>, such that the pins <NUM> may respectively extend into the hollow columns 21d of the second assembling structures <NUM>. Therefore, by the provision of each second assembling structure <NUM> axially and detachably coupled to an associated first assembling structure <NUM>, when one of the plurality of magnetic pole modules 2a of the stator <NUM> is damaged, the damaged magnetic pole module 2a may be removed alone for replacement or maintenance.

In summary, in the motor according to the present invention, the stator includes a plurality of independently separable magnetic pole modules each having at least one second assembling structure. Each magnetic pole module is axially and detachably coupled to the casing by coupling each second assembling structure to an associated first assembling structure of the casing. When one of the plurality of magnetic pole modules of the stator is damaged, the damaged magnetic pole module may be removed alone for replacement or maintenance. After maintenance, by the provision of each second assembling structure and the associated first assembling structure, the repaired magnetic pole module can be easily reassembled to the casing, which may avoid adverse influence on the arrangement of the other magnetic pole modules near the repaired magnetic pole module, permitting easy assembly and disassembly.

Claim 1:
A motor comprising:
a casing (<NUM>) including an inner periphery (N) having a plurality of first assembling structures (<NUM>) and the casing (<NUM>) including a plurality of through-holes (<NUM>);
a stator (<NUM>) disposed on the casing (<NUM>) and including a plurality of magnetic pole modules (2a) each of which is independently separable, wherein each of the plurality of magnetic pole modules (2a) includes at least one second assembling structure (<NUM>), wherein each of the plurality of magnetic pole modules (2a) is detachably coupled in an axial direction to the casing (<NUM>) by coupling each of the at least one second assembling structure (<NUM>) to an associated one of the plurality of first assembling structures (<NUM>), and wherein each of the plurality of magnetic pole modules (2a) includes a plurality of receiving pits (<NUM>) respectively located on an axial upper face (F3) and/or a lower face (F4) of the associated magnetic pole module (2a);
a rotor (<NUM>) rotatably disposed within the stator (<NUM>), wherein an air gap (G) is formed between the rotor (<NUM>) and the stator (<NUM>); and
a plurality of blocks (<NUM>);
wherein
each of the plurality of receiving pits (<NUM>) is aligned with a respective one of the plurality of through-holes (<NUM>); and each of the plurality of blocks (<NUM>) is located in a respective one of the plurality of receiving pits (<NUM>); wherein each of the plurality of blocks (<NUM>) is configured to be pushed by a push member (T) extending through a respective one of the plurality of through-holes (<NUM>), such that the associated magnetic pole module (2a) is displaced axially relative to the casing (<NUM>) to permit removal of the magnetic pole module (2a).