motor

Abstract

A motor can be provided including a shaft, a rotor coupled to the shaft, and a stator disposed corresponding to the rotor. The rotor includes a rotor core, a magnet disposed on an outer surface of the rotor core, and a guide in contact with the rotor core. The guide includes a first member in contact with one side surface of the rotor core, and a plurality of second members (420, 430) extending in an axial direction from the first member and in contact with a side surface of the magnet, wherein a position of one end portion and a position of the other end portion of each of the second members are different in a circumferential direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a motor. BACKGROUND

[0002] The motor includes a stator and a rotor. The rotor includes a rotor core and a magnet provided on an outer surface of the rotor core. An adhesive is applied between the rotor core and the magnet. After the adhesive is applied, a curing process is performed. Thus, there is a problem in that the number of manufacturing processes of the motor increases and the processes are complicated.

[0003] Further, the rotor can include a cover surrounding the rotor core and the magnet. The cover can be a can-shaped member formed of a metallic material. When the cover is used, a problem in which the position of the magnet is misaligned can occur during a process in which the rotor core and the magnet are covered by the cover. Further, since the magnet is covered by the cover, there is a problem in that it is difficult to visually check the position of the magnet after the rotor core is covered by the cover and to accurately set and check an inclination angle.

[0004] Further, types of the motor include an interior permanent magnet (IPM) motor in which a magnet is inserted into a core of a rotor and a surface permanent magnet (SPM) rotor in which a magnet is attached to a surface of a core of a rotor.

[0005] In the SPM rotor, a plurality of magnets are bonded to an outer circumferential surface of the rotor core using an adhesive. In this case, a problem in which the adhesive between the outer circumferential surface of the rotor core and the magnet flows downward while other components are contaminated or the adhesive force is uneven can occur. SUMMARY

[0006] TECHNICAL PROBLEM

[0007] The present application aims to provide a motor in which the position of a magnet is arranged, an inclination angle is easily set and checked, and a phenomenon in which the adhesive of the magnet flows is prevented.

[0008] The object to be achieved by the present application is not limited to the above-described object, and other objects not described above will be clearly understood by a person skilled in the art from the following description.

[0009] TECHNICAL SOLUTION

[0010] One aspect of the present application provides a motor including a shaft, a rotor coupled to the shaft, and a stator provided corresponding to the rotor, wherein the rotor includes a rotor core, a magnet provided on an outer surface of the rotor core, and a guide in contact with the rotor core, the guide including a first member in contact with one side surface of the rotor core and a plurality of second members extending from the first member in an axial direction and in contact with side surfaces of the magnet, and a position of one side end portion of the second member and a position of the other side end portion are different in a circumferential direction.

[0011] Another aspect of the present application provides a motor including a shaft, a rotor coupled to the shaft, wherein the rotor includes a rotor core, magnets disposed on an outer surface of the rotor core, and a second member in contact with side surfaces of the magnets, the second member including 2-1 members and 2-2 members arranged in an axial direction, the 2-1 members and the 2-2 members being disposed to be misaligned in a circumferential direction, and the 2-1 members and the 2-2 members being integrally connected to each other.

[0012] Still another aspect of the present application provides a motor including a shaft, a rotor coupled to the shaft, and a stator disposed corresponding to the rotor, wherein the rotor includes first and second rotor cores disposed in an axial direction, and a plurality of magnets disposed on an outer surface of the first rotor core and an outer surface of the second rotor core, the first rotor core includes a plurality of first protrusions protruding from the outer surface of the first rotor core, the second rotor core includes a plurality of second protrusions protruding from the outer surface of the second rotor core, and the rotor further includes first and second members (420, 430), the first member being disposed between the first and second rotor cores in the axial direction, the second member being disposed between the first and second protrusions in the axial direction, and each of the second members being in contact with a side surface of each of the magnets.

[0013] The first member is in contact with one side surface of the first rotor core and another side surface of the second rotor core, and the second members (420, 430) are in contact with one side surface of the first protrusions and another side surface of the second protrusions.

[0014] The rotor core can include first and second rotor cores arranged in the axial direction, and the first member can be disposed between the first and second rotor cores.

[0015] The second member can include 2-1 members extending toward one side of the first member, and 2-2 members extending toward another side of the first member in the axial direction.

[0016] Two side surfaces of the second member can include stepped surfaces.

[0017] The rotor core can include a plurality of protrusions protruding from an outer surface of the rotor core, each of the protrusions can be in contact with a side surface of one of the magnets, and one side end portion of each of the protrusions can be in contact with one side end portion of the second member in the axial direction.

[0018] The rotor core can include first and second protrusions protruding from an outer surface of the rotor core and disposed apart from each other in the axial direction, the first protrusions can be in contact with the 2-1 members in the axial direction, and the second protrusions can be in contact with the 2-2 members in the axial direction.

[0019] The second member can include a body and an extension portion extending from the body, the body can be in contact with a side surface of the magnet, and the extension portion can be in contact with a portion of an outer surface of the magnet.

[0020] The first member can include a third protrusion protruding from one side in an axial direction and a fourth protrusion protruding from the other side, and the third protrusion can be disposed to be misaligned with the fourth protrusion in a circumferential direction.

[0021] Still another aspect of the present application provides a motor including a shaft, a rotor coupled to the shaft, and a stator disposed corresponding to the rotor, wherein the rotor includes a rotor core and a plurality of magnets disposed on an outer side surface of the rotor core, a space portion is formed between the rotor core and the magnets, at least one partition is disposed in the space portion, and the partition overlaps the space portion in an axial direction.

[0022] An adhesive can be disposed in the space portion.

[0023] The space portion can be divided into at least two sections by the partition, and the at least two sections can be disposed in the axial direction.

[0024] The partition can be disposed at a lower end of the space portion, and a portion of a lower side of the space portion can be closed by the partition.

[0025] A groove forming the space portion can be formed in a surface of the rotor core in contact with each of the magnets, and the at least one partition can extend from the rotor core.

[0026] The rotor core can include a plurality of first surfaces spaced apart from each other in a circumferential direction, a plurality of second surfaces disposed between the plurality of first surfaces and spaced apart from each other in the circumferential direction, a plurality of third surfaces connecting the plurality of first surfaces and the plurality of second surfaces, and a fourth surface disposed between the plurality of second surfaces.

[0027] A distance from a center of the rotor to each of the first surfaces can be greater than a distance from the center of the rotor to each of the second surfaces.

[0028] The distance from the center of the rotor to each of the second surfaces can be greater than a distance from the center of the rotor to each of the fourth surfaces.

[0029] A groove forming the space portion can be formed in a surface of each of the magnets in contact with the rotor core, and the at least one partition can extend from each of the magnets.

[0030] A width of a cross section of the partition portion in a direction perpendicular to the axial direction can be smaller than a width of a cross section of the space portion in the direction perpendicular to the axial direction.

[0031] A width of a cross section of the partition portion in a direction perpendicular to the axial direction can be the same as a width of a cross section of the space portion in the direction perpendicular to the axial direction.

[0032] Still another aspect of the present application provides a motor including a shaft, a rotor coupled to the shaft, and a stator disposed corresponding to the rotor, wherein the rotor includes a rotor core and a plurality of magnets disposed on an outer side surface of the rotor core, the rotor core includes a plurality of first plates and at least one second plate stacked in an axial direction, and a slot is formed in a surface of each of the first plates contacting one of the magnets, and no slot is formed in a surface of the second plate contacting each of the magnets.

[0033] An adhesive can be disposed in the slot.

[0034] The plurality of first plates can be sequentially stacked, and the at least one second plate can be stacked at a lower side of the plurality of first plates.

[0035] The at least one second plate can be disposed between the plurality of first plates.

[0036] An outer side portion of the second plate can overlap the adhesive disposed in the slot in the axial direction.

[0037] A ratio of a length of the rotor core in the axial direction to a thickness of the at least one second plate in the axial direction can be less than 0.3.

[0038] The first plate can include a plurality of 1-1 surfaces spaced apart from each other in a circumferential direction, a plurality of 1-2 surfaces disposed between the plurality of 1-1 surfaces and spaced apart from each other in the circumferential direction, a plurality of 1-3 surfaces connecting the plurality of 1-1 surfaces and the plurality of 1-2 surfaces, and a 1-4 surface disposed between the plurality of 1-2 surfaces, and the second plate can include a plurality of 2-1 surfaces spaced apart from each other in the circumferential direction, a 2-2 surface disposed between the plurality of 2-1 surfaces, and a plurality of 2-3 surfaces connecting the plurality of 1-1 surfaces and the 2-2 surface.

[0039] A distance from a center of the rotor to each of the 1-1 surfaces can be greater than a distance from the center of the rotor to each of the 1-2 surfaces, and a distance from the center of the rotor to each of the 2-1 surfaces can be greater than a distance from the center of the rotor to each of the 2-2 surfaces.

[0040] A distance from the center of the rotor to each of the 1-2 surfaces can be greater than a distance from the center of the rotor to each of the 1-4 surfaces.

[0041] Still another aspect of the present application provides a motor including a shaft, a rotor coupled to the shaft, and a stator disposed outside the rotor, wherein the rotor includes a rotor core and a plurality of magnets bonded to an outer side surface of the rotor core by an adhesive, the rotor core includes a plurality of first plates and at least one third plate stacked in an axial direction, a first slot is formed in a surface of each of the first plates which contacts one of the magnets, a second slot is formed in a surface of the third plate which contacts each of the magnets, and a width of a cross section of the second slot in the axial direction is less than a width of a cross section of the first slot in the axial direction.

[0042] The adhesive can be disposed in the first slot.

[0043] The plurality of first plates can be sequentially stacked, and the third plate can be stacked at a lower side of the plurality of first plates.

[0044] The at least one third plate can be stacked between the plurality of first plates.

[0045] An outer side portion of the third plate can overlap the adhesive disposed in the first slot in the axial direction.

[0046] A ratio of a sum of thicknesses of the at least one third plate in the axial direction to a length of the rotor core in the axial direction can be less than 0.3.

[0047] The first plate can include a plurality of 1-1 surfaces spaced apart from each other in a circumferential direction, a plurality of 1-2 surfaces disposed between the plurality of 1-1 surfaces and spaced apart from each other in the circumferential direction, a plurality of 1-3 surfaces connecting the plurality of 1-1 surfaces and the plurality of 1-2 surfaces, and a 1-4 surface disposed between the plurality of 1-2 surfaces, and the third plate can include a plurality of 3-1 surfaces spaced apart from each other in the circumferential direction, a plurality of 3-2 surfaces disposed between the plurality of 3-1 surfaces and spaced apart from each other in the circumferential direction, a plurality of 3-3 surfaces connecting the plurality of 3-1 surfaces and the plurality of 3-2 surfaces, and a 3-4 surface disposed between the plurality of 3-2 surfaces.

[0048] A distance from the center of the rotor to each of the 1-1 surfaces can be greater than a distance from the center of the rotor to each of the 1-2 surfaces, and a distance from the center of the rotor to each of the 3-1 surfaces can be greater than a distance from the center of the rotor to each of the 3-2 surfaces.

[0049] The distance from the center of the rotor to each of the 1-2 surfaces can be greater than the distance from the center of the rotor to each of the 1-4 surfaces, and the distance from the center of the rotor to each of the 3-2 surfaces can be greater than the distance from the center of the rotor to each of the 3-4 surfaces.

[0050] The distance from the center of the rotor to each of the 3-4 surfaces can be greater than the distance from the center of the rotor to each of the 1-4 surfaces.

[0051] Advantageous Effects

[0052] According to an embodiment, there is an advantage of fixing the magnets to the rotor core without an adhesive.

[0053] According to an embodiment, there is an advantage of easily and precisely arranging the positions of the magnets.

[0054] According to an embodiment, there is an advantage of simplifying the manufacturing process of the motor and reducing the manufacturing time by omitting the curing process of the adhesive.

[0055] According to an embodiment, there is an advantage of preventing the magnets from colliding and being damaged during the process of mounting the magnets on the rotor core.

[0056] According to an embodiment, there is an advantage of eliminating a cover that fixes the magnets.

[0057] According to an embodiment, there is an advantage of reducing cogging torque by improving the precision of the tilt angle.

[0058] According to an embodiment, there is an advantage of preventing the adhesive for attaching the magnets from flowing down to prevent the adhesive from contaminating other components, and an advantage of improving durability and extending the service life of the motor by maintaining uniform adhesive force between the rotor core and the magnets. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 FIG. 1 is a view illustrating a motor according to an embodiment.

[0060] Figure 2 FIG. 3 is an exploded view of a rotor.

[0061] Figure 3 FIG. 4 is a perspective view of a rotor.

[0062] Figure 4 FIG. 5 is a perspective view of a first rotor core.

[0063] Figure 5 FIG. 6 is a perspective view of a second rotor core.

[0064] Figure 6 FIG. 7 is a perspective view of a guide from above.

[0065] Figure 7 is a perspective view of the guide from below.

[0066] Figure 8 is a view from one side illustrating the angle of inclination with respect to the second member.

[0067] Figure 9 is a view from the other side illustrating the angle of inclination with respect to the second member.

[0068] Figure 10 is a view illustrating the angle of inclination with respect to the third and fourth protrusions.

[0069] Figure 11 is a view illustrating the process of mounting the guide in the rotor core.

[0070] Figure 12 is a view illustrating the process of fixing the magnets to the rotor core using the guide.

[0071] Figure 13 is a side cross-sectional view of the rotor along the line A-A of Figure 3 .

[0072] Figure 14 is a side cross-sectional view of the rotor along the line B-B of Figure 3 .

[0073] Figure 15 is a view illustrating the first magnet supported by the first protrusion.

[0074] Figure 16 is a view illustrating the magnet further supported by the second member.

[0075] Figure 17 is a cross-sectional view illustrating a motor according to another embodiment.

[0076] Figure 18 is a view illustrating a rotor according to another embodiment.

[0077] Figure 19 and Figure 20 is a view illustrating a rotor according to yet another embodiment.

[0078] Figure 21 is a view illustrating the state of applying an adhesive on the cross section CC’ of Figure 20 .

[0079] Figure 22 is a set of plan views illustrating the first and second plates.

[0080] Figure 23is a set of views illustrating various modification examples in which the number and stacking order of the first plates and the second plates are changed.

[0081] Figure 24 is a view illustrating a rotor of still another embodiment.

[0082] Figure 25 is a view illustrating a state in which an adhesive is applied to a cross section DD' of Figure 24

[0083] Figure 26 is a set of plan views illustrating the first plates and the third plates.

[0084] Figure 27 is a view illustrating a rotor of still another embodiment. DETAILED DESCRIPTION

[0085] A direction parallel to a longitudinal direction (vertical direction) of the shaft is an axial direction, a direction perpendicular to the axial direction with the shaft as a center is a radial direction, and a direction along a circumference of a circle having a radius in the radial direction with the shaft as a center is a circumferential direction.

[0086] Figure 1 is a view illustrating a motor according to an embodiment.

[0087] Referring to Figure 1 , a motor according to the embodiment can include a shaft 100, a rotor 200, a stator 300, a guide 400, and a housing 500. Hereinafter, the term "inward" refers to a direction from the housing 500 toward the shaft 100, and the term "outward" refers to a direction from the shaft 100 toward the housing 500, which is a direction opposite to the "inward".

[0088] The shaft 100 can be coupled to the rotor 200. When electromagnetic interaction occurs between the rotor 200 and the stator 300 due to a current supply, the rotor 200 rotates, and the shaft 100 rotates together with the rotor 200. The shaft 100 can be connected to a steering shaft of a vehicle and can transmit power to the steering shaft of the vehicle.

[0089] The rotor 200 rotates by electrical interaction with the stator 300. The rotor 200 can be disposed inside the stator 300.

[0090] The stator 300 is disposed outside the rotor 200. The stator 300 can include a stator core 300A, a coil 300B, and an insulator 300C mounted on the stator core 300A. The coil 300B can be wound around the insulator 300C. The insulator 300C is disposed between the coil 300B and the stator core 300A to electrically insulate the stator core 300A from the coil 300B. The coil 300B induces a magnetic field with the magnets 220 (see FIG. 2) of the rotor 200.​Figure 2 electrical interaction of the rotor 200 and the stator 300.

[0091] The housing 500 can be disposed outside the rotor 200 and the stator 300.

[0092] Figure 2 is an exploded view illustrating the rotor.

[0093] Referring to Figure 2 The rotor 200 can include a rotor core 210, magnets 220, and a guide 400. The magnets 220 are disposed outside the rotor core 210. The guide 400 can be formed of a plastic resin. The magnets 220 can be a plurality of combined unit magnets.

[0094] The rotor core 210 can include a first rotor core 210A and a second rotor core 210B. The first rotor core 210A and the second rotor core 210B are arranged in an axial direction. The first rotor core 210A and the second rotor core 210B can be disposed to form an inclined angle. The magnets 220 can be divided into first magnets 220A and second magnets 220B. The first magnets 220A are disposed on an outer surface of the first rotor core 210A. The second magnets 220B are disposed on an outer surface of the second rotor core 210B.

[0095] The guide 400 can be disposed between the first rotor core 210A and the second rotor core 210B in the axial direction. The guide 400 is a member for fixing the magnets 220 to the rotor core 210 and is a member that assists in coupling of the first rotor core 210A and the second rotor core 210B.

[0096] Figure 3 is a perspective view illustrating the rotor 200, and Figure 4 is a perspective view illustrating the first rotor core 210A.

[0097] Referring to Figure 3 and Figure 4 The first rotor core 210A and the second rotor core 210B are stacked in the axial direction in a manner that the guide 400 is interposed between the first rotor core 210A and the second rotor core 210B. The first rotor core 210A and the second rotor core 210B are disposed to be misaligned with each other at a predetermined inclined angle. Accordingly, the first magnets 220A and the second magnets 220 are also disposed to be misaligned with each other at the predetermined inclined angle. The rotor core 210 can include a plurality of protrusions 211A and 211B. The protrusions 211A and 211B are in contact with side surfaces of the magnets 220. Hereinafter, among the protrusions 211A and 211B, the protrusions 211A or 211B disposed on the first rotor core 210A are referred to as first protrusions 211A, and the protrusions 211A or 211B disposed on the second rotor core 210B are referred to as second protrusions 211B.

[0098] The first rotor core 210A can include a plurality of first protrusions 211A. The first protrusions 211A serve to guide and fix the first magnets 220A to the first rotor core 210A. The first protrusions 211A protrude from an outer surface of the first rotor core 210A. Also, the first protrusions 211A can be disposed to extend in the axial direction. The plurality of first protrusions 211A can be disposed at predetermined intervals in the circumferential direction of the first rotor core 210A. The first magnets 220A are disposed between the first protrusions 211A adjacent to each other.

[0099] The length L1 of the first protrusions 211A in the axial direction is shorter than the length L2 of the first rotor core 210A in the axial direction. When one side end portion of the first protrusions 211A matches one side end portion of the first rotor core 210A, as shown in FIG. 2A, a space S1 without the first protrusions 211A is provided. The space S1 is a space S1 through which the second members 420 and 430 of the guide 400 enter. Figure 4

[0100] A plurality of first holes 212A are provided in the first rotor core 210A. The first holes 212A are disposed to penetrate from one side surface to the other side surface of the first rotor core 210A. The first holes 212A are holes into which the third protrusions 440 of the guide 400 are inserted.

[0101] Figure 5 FIG. 2B is a perspective view illustrating the second rotor core 210B.

[0102] Referring to Figure 3 and Figure 5 The second rotor core 210B can include a plurality of second protrusions 211B. The second protrusions 211B serve to guide and fix the second magnets 220B to the second rotor core 210B. The second protrusions 211B protrude from an outer surface of the second rotor core 210B. Also, the second protrusions 211B can be disposed to extend in the axial direction. The plurality of second protrusions 211B can be disposed at predetermined intervals in the circumferential direction of the second rotor core 210B. The second magnets 220B are disposed between the second protrusions 211B adjacent to each other.

[0103] The length L3 of the second protrusions 211B in the axial direction is smaller than the length L4 of the second rotor core 210B in the axial direction. When one side end portion of the second protrusions 211B matches one side end portion of the second rotor core 210B, as shown in FIG. 2B, a space S2 without the second protrusions 211B is formed. The space S2 is a space S2 through which the second members 420 and 430 of the guide 400 enter. Figure 5

[0104] ​​A plurality of second holes 212B are provided in the second rotor core 210B. The second holes 212B are provided to pass through from one side surface to the other side surface of the second rotor core 210B. The second holes 212B are holes into which the fourth protrusions 450 of the guide 400 are inserted.

[0105] Figure 6 is a perspective view of the guide 400, illustrated from above, Figure 7 is a perspective view of the guide 400, illustrated from below.

[0106] Referring to Figure 6 and Figure 7 , the guide 400 can include a first member 410 and second members 420 and 430.

[0107] The first member 410 is disposed between the first rotor core 210A and the second rotor core 210B in the axial direction, and the first member 410 is in contact with one side surface of the first rotor core 210A and the other side surface of the second rotor core 210B. The first member 410 can be a flat member having a ring shape, which has a hole through which a shaft passes and is formed in a central portion of the flat member. The first member 410 can include third protrusions 440 and fourth protrusions 450. The third protrusions 440 protrude from one side surface of the first member 410 in the axial direction. Also, the fourth protrusions 450 protrude from the other side surface of the first member 410 in the axial direction. The third protrusions 440 are inserted into the first holes 212A of the first rotor core 210A, and the fourth protrusions 450 are inserted into the second holes 212B of the second rotor core 210B. A plurality of third protrusions 440 and a plurality of fourth protrusions 450 can be provided. The third protrusions 440 and the fourth protrusions 450 can have a cylindrical shape.

[0108] The second members 420 and 430 are members extending from the first member 410 in the axial direction, and the second members 420 and 430 are in contact with side surfaces of the magnets 220. A plurality of second members 420 and 430 are provided. The plurality of second members 420 and 430 can be provided at predetermined intervals along edges of the first member 410. The magnets 220 are positioned between the second members 420 and 430 adjacent to each other.

[0109] The second members 420 and 430 can be divided into 2-1 members 420 and 2-2 members 430. The 2-1 members 420 extend from one side surface of the first member 410 in the axial direction. The 2-2 members 430 extend from the other side surface of the first member 410 in the axial direction. Accordingly, the 2-1 members 420 can be provided at one side of the first member 410, and the 2-2 members 430 can be provided at the other side of the first member 410 in the axial direction.

[0110] To form the inclination angle, one side end portion and the other side end portion of the second members 420 and 430 are disposed different from each other in the circumferential direction of the guide 400. One side end portion of the second members 420 and 430 can correspond to one side end portion 421 of the 2-1 member 420, and the other side end portion of the second members 420 and 430 can correspond to one side end portion 431 of the 2-2 member 430. The 2-1 member 420 and the 2-2 member 430 are members which are connected to each other in the axial direction but are disposed not to be aligned with each other in the circumferential direction of the guide 400.

[0111] Since the 2-1 member 420 and the 2-2 member 430 are disposed not to be aligned with each other in the circumferential direction of the guide 400, stepped surfaces T1 and T2 are formed on both side surfaces of the second members 420 and 430. For example, in the second members 420 and 430, a first stepped surface T1 can be disposed to be coplanar with one side surface of the first member 410, as in the first stepped surface T1 in Figure 6 , and a second stepped surface T2 can be disposed to be coplanar with the other side surface of the first member 410, as in the second stepped surface T2 in Figure 7 . The first stepped surface T1 is a surface which is in contact with one side surface of the first magnet 220A, and the second stepped surface T2 is a surface which is in contact with one side surface of the second magnet 220B. The first stepped surface T1 and the second stepped surface T2 serve to support the magnets 220 in the axial direction.

[0112] Figure 8 is a view illustrating the inclination angle with respect to the second members 420 and 430 from one side, and Figure 9 is a view illustrating the inclination angle with respect to the second members 420 and 430 from the other side.

[0113] Referring to Figure 8 and Figure 9 , the 2-1 member 420 and the 2-2 member 430 are disposed not to be aligned with each other in the circumferential direction of the guide 400. Accordingly, with respect to the center of the guide 400, an angle R1 formed by a center P1 of one side end portion 421 of the 2-1 member 420 and a center P2 of one side end portion 431 of the 2-2 member 430 corresponds to the inclination angle of the motor. Accordingly, the magnets 220 mounted along the 2-1 member 420 and the 2-2 member 430 can be precisely guided to a position at which the corresponding angle is formed.

[0114] Figure 10 is a view illustrating the inclination angle with respect to the third and fourth protrusions.

[0115] Referring to Figure 10, the third protrusion 440 and the fourth protrusion 450 are disposed to be misaligned with each other in the circumferential direction of the guide 400. Accordingly, an angle R2 formed between the center of the third protrusion 440 and the center of the fourth protrusion 450 around the center of the guide 400 corresponds to the tilt angle of the motor. In the process of installing the guide 400 in the rotor core 210, since the third protrusion 440 is inserted into the first hole 212A of the first rotor core 210A and the fourth protrusion 450 is inserted into the second hole 212B of the second rotor core 210B, the position of the 2-1 member 420 and the position of the 2-2 member 430 can be accurately disposed in the circumferential direction of the guide 400. When the position of the 2-1 member 420 and the position of the 2-2 member 430 are accurately set, the magnets 220 installed along the 2-1 member 420 and the 2-2 member 430 can be accurately guided to positions forming the corresponding tilt angle.

[0116] Figure 11 is a view illustrating a process of installing the guide 400 in the rotor core, and 12 is a view illustrating a process of fixing the magnets 220 to the rotor core 210 using the guide 400.

[0117] Referring to Figure 11 and Figure 12 , the first rotor core 210A can be installed on the guide 400 from one side of the guide 400, and the second rotor core 210B can be installed on the guide 400 from the other side of the guide 400 in the axial direction, such that the guide 400 is disposed between the first rotor core and the second rotor core. In a state in which the 2-1 member 420 and the first protrusion 211A are aligned with each other in the circumferential direction of the guide 400, the first rotor core 210A is installed on the guide 400. Also, the 2-2 member 430 and the second protrusion 211B are aligned with each other in the circumferential direction of the guide 400, and the second rotor core 210B is installed on the guide 400.

[0118] In this case, the 2-1 member 420 and the first protrusion 211A face each other, become closer to each other, and finally come into contact with each other. Also, the 2-2 member 430 and the second protrusion 211B also face each other, become closer to each other, and finally come into contact with each other.

[0119] Then, the magnets 220 are inserted between the second members 420 and 430 in the axial direction.

[0120] Figure 13 is a side cross-sectional view of the rotor 200 illustrating the rotor core 210 along the line A-A of FIG. 10, and Figure 3 is a side cross-sectional view of the rotor 200 illustrating the rotor core 210 along the line B-B of FIG. 10. Figure 14 is a side cross-sectional view of the rotor 200 illustrating the rotor core 210 along the line B-B of FIG. 10. Figure 3 ​

[0121] Referring to Figure 13 When the magnet 220 is assembled to the rotor core 210 using the guide 400, one side surface 211Aa of the first protrusion 211A is in contact with one side end portion 421 of the 2-1 member 420. In this case, one side end of the second magnet 220B is in contact with the second stepped surface T2 of the second members 420 and 430. The second magnet 220B is supported in the axial direction by the second stepped surface T2.

[0122] Referring to Figure 14 When the magnet 220 is assembled to the rotor core 210 using the guide 400, one side surface 211Ba of the second protrusion 211B is in contact with one side end portion 431 of the 2-2 member 430. In this case, one side end of the first magnet 220A is in contact with the first stepped surface T1 of the second members 420 and 430. The first magnet 220A is supported in the axial direction by the first stepped surface T1.

[0123] Figure 15 is a view illustrating the first magnet 220A supported by the first protrusion 211A, and Figure 16 is a view illustrating the magnet 220 further supported by the second members 420 and 430.

[0124] Referring to Figure 15 The first protrusion 211A is in contact with the side surface of the first magnet 220A to guide assembly of the first magnet 220A and support the first magnet 220A so that the first magnet 220A does not move in the circumferential direction of the rotor 200. In addition, the first protrusion 211A is formed so that the width of the inner side is greater than the width of the outer side, and fixes the first magnet 220A so that the first magnet 220A does not separate in the radial direction of the rotor 200. Although not illustrated in the drawings, the second protrusion 211B also similarly supports the second magnet 220B.

[0125] Referring to Figure 16 The 2-1 member 420 can include a body 422 and an extension portion 423 extending from the body 422. The body 422 is disposed between adjacent first magnets 220A and is in contact with the side surface of the first magnet 220A. The body 422 is in contact with the side surface of the first magnet 220A to guide assembly of the first magnet 220A and support the first magnet 220A so that the first magnet 220A does not move in the circumferential direction of the rotor 200.

[0126] The extension portion 423 is in contact with the outer surface of the first magnet 220A. The extension portion 423 is in contact with the outer surface of the first magnet 220A to firmly fix the first magnet 220A so that the first magnet 220A does not separate together with the first protrusion 211A in the radial direction of the rotor 200. Although not illustrated in the drawings, similarly, the 2-2 member 430 also includes such a body and an extension portion and supports the second magnet 220B.

[0127] Figure 17 is a cross-sectional view illustrating a motor according to another embodiment.

[0128] Referring to Figure 17 A motor according to an embodiment can include a housing 1100 having one side formed with an opening, a cover 1200 disposed on the housing 1100, a stator 1300 disposed in the housing 1100, a rotor 1400 disposed inside the stator 1300, a shaft 1500 coupled to the rotor 1400 and rotating, a bus bar 1600 disposed on the stator 1300, and a sensor portion 1700 configured to detect rotation of the shaft 1500.

[0129] The housing 1100 and the cover 1200 can form the outside of the motor. The housing 1100 and the cover 1200 are coupled to form an accommodation space. In this case, the stator 1300, the rotor 1400, the shaft 1500, etc. can be disposed in the accommodation space. In this case, the shaft 1500 is rotatably disposed in the accommodation space. Further, the motor 1 can further include bearings 10 disposed on upper and lower portions of the shaft 1500.

[0130] The shape or material of the housing 1100 can be changed in different ways. For example, the housing 1100 can be formed of a metal material that firmly withstands even high temperatures.

[0131] The cover 1200 is disposed on the housing 1100 and covers the opening of the housing 1100.

[0132] The stator 1300 can be disposed inside the housing 1100. In this case, the stator 1300 can be coupled to the housing 1100 in a thermal press fit. Further, the stator 1300 can be supported by the inner circumferential surface of the housing 1100.

[0133] The stator 1300 is disposed outside the rotor 1400. The stator 1300 can include a stator core 1310, a coil 1320, and an insulator 1330. The insulator 1330 is mounted on the stator core 1310. In this case, the coil 1320 is wound on the insulator 1330. In this case, the insulator 1330 is disposed between the stator core 1310 and the coil 1320 to insulate the coil 1320.

[0134] The coil 1320 that generates the rotating magnetic field can be wound around the stator core 1310.

[0135] The stator core 1310 can be formed as a stack of multiple thin steel plates, but is not limited thereto. For example, the stator core 1310 can also be formed as a single component. Furthermore, the stator core 1310 can be formed by arranging multiple unit stator cores in the circumferential direction. The rotor 1400 can be disposed inside the stator 1300. In addition, the shaft 1500 can be connected to the central portion of the rotor 1400.

[0136] Because of the bearing 10, the shaft 1500 can be rotatably mounted in the housing 1100. In addition, the shaft 1500 can rotate together with the rotor 1400 as the rotor 1400 rotates.

[0137] Figure 18 This is a view illustrating a rotor according to another embodiment.

[0138] Reference Figure 18 The rotor 1400 may include a rotor core 1410 and a magnet 1420. The rotor core 1410 is rotatably disposed in a cylindrical space portion formed in the central portion of the stator 1300.

[0139] Multiple magnets 1420 can be disposed on the outer circumferential surface of the rotor core 1410. Furthermore, the opposing surfaces of the rotor core 1410 and the magnets 1420 can be joined. In this case, a space portion 1410G can be formed between the rotor core 1410 and the magnets 1420. An adhesive can be disposed in the space portion 1410G. Additionally, one or more partitions 1410W can be included in each space portion of the space portion 1410G. In this case, the partitions 1410W overlap with the space portion 1410G in the axial direction. That is, one or more partitions 1410W can be used to support the adhesive disposed in each space portion of the space portion 1410G in the axial direction.

[0140] Multiple partitions 1410W can be provided. The partitions 1410W can divide each space portion 1410G into one or two segments. The partition segments can be arranged in the axial direction. The partitions 1410W can divide the space portion 1410G into an upper portion and a lower portion. In this case, adhesive can be applied to the upper and lower portions of the space portion 1410G. Furthermore, the partitions 1410W can be provided in the lower end of the space portion 1410G. In this case, at least a portion of the lower side of the space portion 1410G can be closed by the partitions 1410W.

[0141] The outer side end portion of the partition portion 1410W can be in contact with the magnet 1420. In this case, the width of the cross section of each of the partition portions 1410W cut in a direction perpendicular to the axial direction is equal to the width of the cross section of each of the space portions 1410G cut in a direction perpendicular to the axial direction. Accordingly, the partition portions 1410W can divide the space portions 1410G into a plurality of closed sections. In addition, the lower side of the space portions 1410G can be closed.

[0142] The outer side end portion of the partition portion 1410W can also be spaced apart from the magnet 1420. In this case, the width of the cross section of each of the partition portions 1410W cut in a direction perpendicular to the axial direction can be smaller than the width of the cross section of each of the space portions 1410G cut in a direction perpendicular to the axial direction. Accordingly, the partition portions 1410W can divide each of the space portions 1410G into a plurality of sections, such that portions of the sections can be connected. In addition, only a portion of the lower side of each of the space portions 1410G can be closed.

[0143] A groove extending in the axial direction can be formed in the surface of the rotor core 1410 in contact with the magnet 1420. In this case, the groove can form the space portion 1410G between the rotor core 1410 and the magnet 1420. In addition, the partition portion 1410W can extend on the rotor core 1410.

[0144] The rotor core 1410 can include a plurality of first surfaces 1410-1, a plurality of second surfaces 1410-2, a plurality of third surfaces 1410-3, and a fourth surface 1410-4 on an outer circumferential surface thereof.

[0145] The plurality of first surfaces 1410-1 can be disposed between the plurality of magnets 1420. The plurality of first surfaces 1410-1 are spaced apart from each other in the circumferential direction. The first surface 1410-1 is not in contact with the magnet 1420.

[0146] The second surface 1410-2 can be disposed between the plurality of first surfaces 1410-1. The plurality of second surfaces 1410-2 are spaced apart from each other. In this case, a distance from the center of the rotor to each of the first surfaces 1410-1 can be greater than a distance from the center of the rotor to each of the second surfaces 1410-2. That is, the second surface 1410-2 is formed to be recessed closer to the shaft 1500 than the first surface 1410-1. In this case, the second surface 1410-2 is in contact with the inner side surface of the magnet 1420.

[0147] The third surface 1410-3 connects the plurality of first surfaces 1410-1 and the plurality of second surfaces 1410-2. In this case, the third surface 1410-3 is in contact with both sides of each of the magnets 1420.

[0148] The fourth surface 1410-4 is disposed between the plurality of second surfaces 1410-2. In this case, a distance from the center of the rotor to each of the second surfaces 1410-2 can be greater than a distance from the center of the rotor to each of the fourth surfaces 1410-4. That is, the fourth surface 1410-4 is formed to be recessed closer to the shaft 1500 than the second surface 1410-2. In this case, a space portion 1410G can be formed between the fourth surface 1410-4 and the magnets 1420.

[0149] Although not illustrated in the drawings, a groove can be formed in the inner side surface of the magnet. In this case, the space portion can be formed by the groove between the magnet and the rotor core. Also, the partition portion can extend in the inner side surface of the magnet. In addition, although not illustrated in the drawings, a groove can also be formed in one selected from each of the magnets and the rotor core. In this case, the space portion can be formed by the groove between each of the magnets and the rotor core. In addition, the partition portion can also extend from the other of each of the magnets and the rotor core.

[0150] Figure 19 and Figure 20 is a view illustrating a rotor according to still another embodiment, and Figure 21 is a view illustrating a state in which an adhesive is applied on a cross section CC’ of Figure 19 .

[0151] Referring to Figure 19 and Figure 20 , the rotor core 1410A can be formed by stacking a plurality of core plates. The plurality of core plates is stacked in the axial direction. The plurality of magnets 1420 is disposed on the outer circumferential surface of the rotor core 1410A. In this case, a plurality of magnet grooves allowing the plurality of magnets 1420 to be disposed can be formed in the rotor core 1410A. The plurality of magnet grooves can be disposed to be separated from each other in the circumferential direction. In this case, a depth of the magnet groove can be less than a thickness of the magnet 1420.

[0152] The rotor core 1410A can be formed using two or more core plates. The rotor core 1410A can include a plurality of first plates 1411 and one or more second plates 1412.

[0153] A groove is formed in a surface of the first plate 1411 which is in contact with the magnet 1420. Also, a groove is not formed in a surface of the second plate 1412 which is in contact with the magnet 1420. Referring to Figure 21The adhesive G is disposed in the groove of the first plate 1411. In this case, the outer side end portion of the second plate 1412 blocks the groove of the first plate 1411 in the axial direction. Accordingly, it is possible to prevent the adhesive G disposed in the groove of the first plate 1411 from flowing downward through the outer side end portion of the second plate 1412.

[0154] Figure 22 FIGS. 1A and 1B are a set of plan views illustrating a first plate and a second plate.

[0155] Each of the first plates 1411 can include a plurality of 1-1 surfaces 1411-1, a plurality of 1-2 surfaces 1411-2, a 1-3 surface 1411-3, and a 1-4 surface 1411-4 on an outer circumferential surface thereof.

[0156] The plurality of 1-1 surfaces 1411-1 can be disposed between the plurality of magnets 1420. The plurality of 1-1 surfaces 1411-1 are spaced apart from each other in the circumferential direction. The 1-1 surface 1411-1 is not in contact with the magnet 1420.

[0157] The 1-2 surface 1411-2 can be disposed between the plurality of 1-1 surfaces 1411-1. The plurality of 1-2 surfaces 1411-2 can be provided. The plurality of 1-2 surfaces 1411-2 are spaced apart from each other. In this case, a distance from the center of the rotor to each of the 1-1 surfaces 1411-1 can be greater than a distance from the center of the rotor to each of the 1-2 surfaces 1411-2. That is, the 1-2 surface 1411-2 is formed to be recessed closer to the shaft 1500 than the 1-1 surface 1411-1. The 1-2 surface 1411-2 is in contact with the inner side surface of the magnet 1420. In this case, the first groove 1411G can be formed in the 1-2 surface 1411-2.

[0158] The 1-3 surface 1411-3 connects the plurality of 1-1 surfaces 1411-1 and the plurality of 1-2 surfaces 1411-2. In this case, the 1-3 surface 1411-3 is in contact with two side surfaces of each of the magnets 1420.

[0159] 1-4 surface 1411-4 is disposed between a plurality of 1-2 surfaces 1411-2. In this case, a distance from the center of the rotor to each of the 1-2 surfaces 1411-2 can be greater than a distance from the center of the rotor to each of the 1-4 surfaces 1411-4. That is, the 1-4 surface 1411-4 is formed to be recessed closer to the shaft 1500 than the 1-2 surface 1411-2. In this case, a first groove 1411G can be formed between the 1-4 surface 1411-4 and the magnet 1420. The first grooves 1411G of the first plate 1411 are connected in the axial direction. Accordingly, when a plurality of first plates 1411 are stacked, a groove extending in the axial direction can be formed. In addition, an adhesive G is disposed in the first grooves 1411G.

[0160] Each of the second plates 1412 can include a plurality of 2-1 surfaces 1412-1, 2-2 surfaces 1412-2, a plurality of 2-3 surfaces 1412-3 on an outer circumferential surface thereof.

[0161] The plurality of 2-1 surfaces 1412-1 can be disposed between the plurality of magnets 1420. The plurality of 2-1 surfaces 1412-1 are spaced apart from each other in the circumferential direction. The 2-1 surface 1412-1 is not in contact with the magnet 1420.

[0162] The 2-2 surface 1412-2 can be disposed between the plurality of 2-1 surfaces 1412-1. One 2-2 surface 1412-2 is disposed between the spaced apart 2-1 surfaces 1412-1. In this case, a distance from the center of the rotor to each of the 2-1 surfaces 1412-1 can be greater than a distance from the center of the rotor to each of the 2-2 surfaces 1412-2. That is, the 2-2 surface 1412-2 is formed to be recessed closer to the shaft 1500 than the 2-1 surface 1412-1. The 2-2 surface 1412-2 can be in contact with an inner side surface of the magnet 1420. In this case, no groove is formed in the 2-2 surface 1412-2. In this case, a portion of the 2-2 surface 1412-2 can overlap the first groove 1411G in the axial direction.

[0163] The 2-3 surface 1412-3 connects the plurality of 2-1 surfaces 1412-1 and the plurality of 2-2 surfaces 1412-2. In this case, the 2-3 surface 1412-3 is in contact with two side surfaces of each of the magnets 1420.

[0164] Two second plates 1412 can be provided. As in Figure 19 and Figure 20In this case, one second plate 1412 can support the adhesive flowing from the upper first slot 1411H, and another second plate 1412 can support the adhesive flowing downward from the lower first slot 1411G, so that the adhesive can be more effectively prevented from flowing downward.

[0165] The shape of the rotor core 1410 can vary according to the number and stacking order of the first plates 1411 and the second plates 1412.

[0166] Figure 23 is a set of views illustrating various modification examples in which the number and stacking order of the first plates and the second plates are changed.

[0167] Referring to Figure 23 a, one second plate 1412 can be provided. Also, a plurality of first plates 1411 can be stacked in order. In this case, one second plate 1412 can be provided at the lower side of the plurality of first plates 1411. In this case, the second plate 1412 provided at the lowermost end portion of the rotor core can block the adhesive from flowing out of the first slot of the first plate 1411.

[0168] Referring to Figure 23 b, three or more second plates 1412 can be provided. In this case, the three or more second plates 1412 can be stacked between the first plates 1411. In this case, the second plates 1412 provided between the first plates 1411 are provided to be apart from each other in the axial direction. Also, one second plate 1412 can be stacked at the lower side of the plurality of first plates 1411.

[0169] As the number of the second plates 1412 increases, the effect of preventing the adhesive from flowing downward can be improved. However, as the number of the second plates 1412 increases, the first slot 1411G is shielded, the magnetic effect is reduced, and thus the magnetic characteristics of the rotor 1400 can be deteriorated. Accordingly, four or less second plates 1412 can be provided. Also, the sum of the thicknesses of the one or more second plates 1412 in the axial direction can be less than 0.3 times the length of the rotor core in the axial direction. For example, the sum of the thicknesses of the one or more second plates 1412 in the axial direction can be less than 0.2 times the length of the rotor core in the axial direction.

[0170] The thickness of the second plate 1412 in the axial direction can vary according to the number of the second plates 1412. Table 1 is a table showing the maximum thickness of each of the second plates according to the number of the second plates.

[0171] [Table 1]

[0172]

[0173]

[0174] As shown in Table 1, as the number of the second plates increases, the thickness of each of the second plates in the axial direction also decreases. In this case, when the ratio of the sum T of the thicknesses of the second plates in the axial direction to the length of the rotor core in the axial direction is greater than 0.2, the magnetic characteristics of the rotor deteriorate.

[0175] According to another embodiment of the present application, in order to improve the magnetic characteristics of the rotor core, the rotor core can be formed such that the slots can be formed not to be completely blocked in the axial direction.

[0176] Figure 24 is a view illustrating a rotor according to still another embodiment, Figure 25 is a view illustrating a state in which an adhesive is applied on a cross section DD' of Figure 24 , and Figure 26 is a set of plan views illustrating a first plate and a third plate. In this case, since each member whose reference numeral is the same as that of Figures 17 to 23 has the same shape and function, a repeated explanation thereof is omitted.

[0177] Referring to Figure 24 and Figure 25 , the rotor core 1410B can include a plurality of first plates 1411 and one or more third plates 1413. In this case, the plurality of first plates 1411 and the one or more third plates 1413 can be stacked in the axial direction.

[0178] Referring to Figure 26 , first slots 1411G can be formed in a surface of the first plate 1411 which contacts the magnet 1420, and second slots 1413G can be formed in a surface of the third plate 1413 which contacts the magnet 1420. In the radial direction, the width of the second slot 1413G can be smaller than the width of the first slot 1411G. In this case, the plurality of first plates 1411 and the third plate 1413 can be stacked in the axial direction such that the plurality of first slots 1411G and the one or more second slots 1413G can be disposed in line with each other in the axial direction. In this case, the plurality of first slots 1411G can extend in the axial direction. Further, the second slot 1413G can be disposed between the plurality of first slots 1411G which extend. Alternatively, the second slot 1413G can be disposed at a lower side of the plurality of first slots 1411B.

[0179] Each of the third plates 1413 can include a plurality of 3-1 surfaces 1413-1, a plurality of 3-2 surfaces 1413-2, a plurality of 3-3 surfaces 1413-3, and a 3-4 surface 1413-4.

[0180] The plurality of 3-1 surfaces 1413-1 can be disposed between the plurality of magnets 1420. The plurality of 3-1 surfaces 1413-1 are spaced apart from each other in the circumferential direction. The 3-1 surface 1413-1 is not in contact with the magnet 1420.

[0181] The 3-2 surface 1413-2 can be disposed between the plurality of 3-1 surfaces 1413-1. The plurality of 3-2 surfaces 1413-2 are disposed. The plurality of 3-2 surfaces 1413-2 are spaced apart from each other. In this case, a distance from the center of the rotor to each of the 3-1 surfaces 1413-1 can be greater than a distance from the center of the rotor to each of the 3-2 surfaces 1413-2. That is, the 3-2 surface 1413-2 is formed to be recessed closer to the shaft 1500 than the 3-1 surface 1413-1. The 3-2 surface 1413-2 is in contact with the inner side surface of the magnet 1420. In this case, the second groove 1413G can be formed in the 3-2 surface 1413-2.

[0182] The 3-3 surface 1413-3 connects the plurality of 3-1 surfaces 1413-1 and the plurality of 3-2 surfaces 1413-2. In this case, the 3-3 surface 1413-3 is in contact with two side surfaces of each of the magnets 1420.

[0183] The 3-4 surface 1413-4 is disposed between the plurality of 3-2 surfaces 1413-2. In this case, a distance from the center of the rotor to each of the 3-2 surfaces 1413-2 can be greater than a distance from the center of the rotor to each of the 3-4 surfaces 1413-4. That is, the 3-4 surface 1413-4 is formed to be recessed closer to the shaft 1500 than the 3-2 surface 1413-2. In this case, the second groove 1413G can be formed between the 3-4 surface 1413-4 and the magnet 1420. The first grooves 1411G of the first plates 1411 are connected in the axial direction. Accordingly, when the plurality of first plates 1411 are stacked, a groove extending in the axial direction can be formed. The adhesive G is not applied on the second groove 1413G. However, a portion of the adhesive G can be disposed in the second groove 1413G while the adhesive in the first groove 1411G flows downward.

[0184] According to still another embodiment of the present application, in the rotor core, the first plate, the second plate, and the third plate are all applied. In this case, it is possible to block the entire lower end portion of the slot extending in the axial direction of the rotor core, and it is also possible to block only a portion of the upper side portion of the slot.

[0185] Figure 27 is a view illustrating a rotor according to still another embodiment. In this case, each member whose reference numeral is the same as that of those of Figures 17 to 26 the same members having the same shapes and functions, and a repeated explanation thereof is omitted.

[0186] Referring to Figure 27 , the rotor core can be formed by stacking a plurality of first plates 1411, one or more second plates 1412, and one or more third plates 1413.

[0187] In this case, the third plate 1412 can be stacked between the plurality of first plates 1411. In addition, the second plate 1412 can be disposed below the stacked first plate 1411 and the third plate 1413. In this case, a portion of the adhesive disposed in the first slot is blocked when the adhesive passes through the second slot, and the adhesive can be completely blocked by the second plate 1412.

[0188] Examples of an inner rotor type motor have been described in the above-described embodiments, but the present application is not limited thereto. The present application can also be applied to an outer rotor type motor. Furthermore, the present application can be applied to various devices for vehicles or home appliances.

Claims

1.A motor comprising: a shaft; a rotor coupled to the shaft; and a stator disposed corresponding to the rotor, wherein the rotor includes a rotor core, magnets disposed on an outer surface of the rotor core, and a guide in contact with the rotor core, the guide includes a first member in contact with one side surface of the rotor core and a plurality of second members extending from the first member in an axial direction and in contact with side surfaces of the magnets, and a position of one side end portion of the second member and a position of the other side end portion thereof are different from each other in a circumferential direction, wherein the rotor core includes a plurality of protrusions protruding from an outer surface of the rotor core, each of the protrusions is in contact with a side surface of one of the magnets, and one side end portion of each of the protrusions is in contact with one side end portion of the second member in the axial direction, wherein an axial length of each of the protrusions is less than an axial length of the rotor core, wherein the second member includes a stepped surface coplanar with the first member, wherein the stepped surface is in contact with an axial end of the magnet. 2.The motor of claim 1, the second member includes a 2-1 member and a 2-2 member arranged in an axial direction, wherein the 2-1 member and the 2-2 member are disposed to be misaligned in a circumferential direction, and the 2-1 member and the 2-2 member are integrally connected to each other. 3.The motor of claim 1, the rotor includes a first rotor core and a second rotor core disposed in an axial direction and a plurality of magnets disposed on an outer surface of the first rotor core and an outer surface of the second rotor core, wherein the first rotor core includes a plurality of first protrusions protruding from the outer surface of the first rotor core, the second rotor core includes a plurality of second protrusions protruding from the outer surface of the second rotor core, the first member is disposed between the first rotor core and the second rotor core in the axial direction, and the second member is disposed between the first protrusions and the second protrusions in the axial direction and in contact with side surfaces of each of the magnets, the first member is in contact with one side surface of the first rotor core and the other side surface of the second rotor core, and the second member is in contact with one side surface of the first protrusions and the other side surface of the second protrusions. 4.The motor of claim 2, wherein: the rotor core includes a first protrusion and a second protrusion protruding from the outer surface of the rotor core and disposed apart from each other in the axial direction, the first protrusion is in contact with the 2-1 member, and the second protrusion is in contact with the 2-2 member in the axial direction. 5.The motor of claim 1, the second member includes a body in contact with the side surface of the magnet and an extension portion extending from the body in contact with a portion of an outer surface of the magnet. wherein, 6.The motor of claim 1, ​ wherein The first member includes a third protrusion protruding from one side in the axial direction and a fourth protrusion protruding from the other side, and the third protrusion is disposed out of alignment with the fourth protrusion in the circumferential direction.

Images