Motor and method for manufacturing a stator arranged in a motor

Abstract

According to embodiments, a motor is provided, including a shaft, a rotor coupled to the shaft, a stator provided corresponding to the rotor, and a housing provided outside the stator. The stator includes a stator core, an insulator coupled to the stator core, a plurality of protrusions extending from a lower end of the insulator, and a protrusion portion provided below the insulator and fixed to the housing. The plurality of protrusions are spaced apart from each other in a circumferential direction, and at least a portion of the protrusion portion is provided in a space formed between the plurality of protrusions.

Description

TECHNICAL FIELD

[0001] The present application relates to a motor and a method of manufacturing a stator included in the motor. BACKGROUND

[0002] A motor includes a shaft, a rotor, and a stator. The stator includes a plurality of stator cores. In order to insulate, an insulator is provided on the stator core. In addition, a coil is wound around the insulator. A phenomenon in which the stator slips in a housing can occur. In addition, the insulator is assembled with each tooth on the stator, and thus there is a problem in which the number of manufacturing processes increases. SUMMARY

[0003] TECHNICAL PROBLEM

[0004] An object of the present application is to provide a motor that prevents a slip phenomenon of a stator and simplifies a manufacturing process of the stator, and a method of manufacturing a stator included in the motor.

[0005] TECHNICAL SOLUTION

[0006] One aspect of the present application provides a motor including a shaft, a rotor coupled to the shaft, a stator provided to correspond to the rotor, and a housing provided at an outer side of the stator, wherein the stator includes a stator core, an insulator coupled to the stator core, a plurality of protrusions extending from a lower end portion of the insulator, and a protrusion portion provided at a lower side portion of the insulator and fixed to the housing, the plurality of protrusions are provided to be separated from each other in a circumferential direction, and at least a portion of the protrusion portion is provided in a separation space formed between the plurality of protrusions.

[0007] An upper end portion of the protrusion portion can be provided at a higher level than a lower end portion of the protrusions.

[0008] The protrusions can include a first protrusion extending from one side of the lower end portion of the insulator and a second protrusion extending from the other side of the lower end portion of the insulator, wherein the first protrusion and the second protrusion can be provided to be separated from each other in the circumferential direction such that the protrusion portion is interposed between the first protrusion and the second protrusion.

[0009] A width of the separation space in the circumferential direction can be greater than a width of the protrusion portion in the circumferential direction.

[0010] The protrusion portion can be provided as a plurality of protrusion portions, the plurality of protrusion portions can be provided on a lower surface of the housing, and the plurality of protrusion portions can be provided in a radial direction.

[0011] The insulator can include a first insulator, and a second insulator adjacent to the first insulator, wherein the first insulator can include a first bridge extending toward the second insulator, and the second insulator can include a second bridge extending toward the first bridge.

[0012] A burr can be formed on each of a cross section of the first bridge and a cross section of the second bridge.

[0013] The stator core can include a yoke and a plurality of teeth protruding from the yoke, the insulator can include a body surrounding the teeth and a guide extending from the body, the protrusion can extend from a lower side of the guide, and the bridge can extend from a side surface of the guide.

[0014] Another aspect of the present application provides a method of manufacturing a stator included in a motor, the method including a preparation operation of preparing a plurality of stator cores connected by a plurality of bridges and an insulator, a coupling operation of coupling the plurality of stator cores and the insulator, a cutting operation of cutting one side of each of the bridges to separate the stator cores, a winding operation of winding a coil around each of the plurality of stator cores, and an arrangement operation of arranging the plurality of stator cores.

[0015] The cutting operation can include dividing the bridge into a first bridge extending from any one of the insulators and a second bridge extending from the other insulator.

[0016] Advantageous effects

[0017] According to the embodiment, when the stator expands due to high temperature while the protrusion extending from the stator and the rib (protrusion) protruding from the bottom surface of the housing engage with each other in the rotation direction, a phenomenon in which the stator slips in the housing in the rotation direction can be prevented. Thus, the operation reliability of the motor can be improved.

[0018] According to the embodiment, since the one-piece insulator is mounted on the plurality of stator cores and then cut to separate the stator cores, the trouble in assembling the insulator with each of the stator cores can be reduced, and the process of manufacturing the stator can be simplified. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a cross-sectional view illustrating a motor according to an embodiment.

[0020] Figure 2 is a perspective view illustrating a stator of a motor according to a first embodiment.

[0021] Figure 3 is a perspective view illustrating a portion of a stator.

[0022] Figure 4is a cross-sectional perspective view illustrating the housing body.

[0023] Figure 5 is a plan view illustrating a state in which the insulator is disposed on the housing body.

[0024] Figure 6 is a partial perspective view illustrating a state in which the insulator is disposed in the housing body.

[0025] Figure 7 is a view illustrating a first portion as viewed from an axial center of the stator.

[0026] Figure 8 is a view illustrating a state of a second portion as viewed from the outside.

[0027] Figure 9 is a side view illustrating the first portion, the second portion, and the protruding portion.

[0028] Figure 10 is a cross-sectional view taken along a line AA' of Figure 9 .

[0029] Figure 11 is a cross-sectional view taken along a line BB' of Figure 9 .

[0030] Figure 12 is a view illustrating a modified example of the second portion shown in Figure 11 .

[0031] Figure 13 is a perspective view illustrating a stator of a motor according to a second embodiment.

[0032] Figure 14 is a perspective view illustrating a portion of the stator.

[0033] Figure 15 is a plan view of Figure 14 .

[0034] Figure 16 is a perspective view illustrating an upper insulator.

[0035] Figure 17 is a plan view illustrating the upper insulator.

[0036] Figure 18 is a partial enlarged view of Figure 17 .

[0037] Figure 19 is a perspective view illustrating a lower insulator.

[0038] Figure 20 is a bottom view illustrating the insulator.

[0039] Figure 21 is Figure 20 a partial enlarged view of

[0040] Figure 22 is a perspective view illustrating a stator of a motor according to a third embodiment.

[0041] Figure 23 is a plan view illustrating an upper insulator.

[0042] Figure 24 is a bottom view illustrating a lower insulator.

[0043] Figure 25 is a flowchart for describing a method of manufacturing a stator of a motor according to a second embodiment.

[0044] Figure 26 is a perspective view illustrating a state in which a stator core and an insulator are coupled in operation S200 shown in Figure 25 DETAILED DESCRIPTION

[0045] Hereinafter, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0046] A direction parallel to a longitudinal direction (vertical direction) of the shaft will be referred to as an axial direction, a direction perpendicular to the axial direction passing through the shaft will be referred to as a radial direction, and a direction having a radius in the radial direction passing through the shaft along a circumference of a circle will be referred to as a circumferential direction.

[0047] Figure 1 is a cross-sectional view illustrating a motor according to an embodiment.

[0048] Referring to Figure 1 , a motor according to an embodiment can include a shaft 100, a rotor 200, a stator 300, a housing 400, and a bearing 500.

[0049] The shaft 100 is coupled to the rotor 200. When electromagnetic interaction occurs between the rotor 200 and the stator 300 due to the supply of current, the rotor 200 rotates, and the shaft 100 rotates together with the rotor 200. The shaft 100 can be connected to a vehicle steering system, and can transmit power to the vehicle steering system.

[0050] The rotor 200 rotates by electrical interaction with the stator 300.

[0051] ​The rotor 200 can include a rotor core and magnets. The rotor core can be formed in the form of a plurality of thin circular steel plates stacked or a cylindrical shape. A hole to which the shaft 100 is coupled can be formed in a central portion of the rotor core. A protrusion to guide the magnets can protrude from an outer circumferential surface of the rotor core. The magnets can be attached to the outer circumferential surface of the rotor core. A plurality of magnets can be disposed at predetermined intervals along a circumference of the rotor core. The rotor 200 can include a can member that surrounds and fixes the magnets to prevent the magnets from being separated from the rotor core and exposed.

[0052] The coils can be wound around the stator 300 to cause an electrical interaction that occurs between the stator and the rotor 200. Specific components of the stator 300 for winding the coils are as follows. The stator 300 can include a stator core 310 having a plurality of teeth. In the stator core 310, an annular yoke portion can be provided, and the teeth around which the coils are wound from the yoke toward the center can be provided. The teeth can be disposed at predetermined intervals along an outer circumferential surface of the yoke portion. At the same time, the stator core 310 can be formed by stacking a plurality of thin steel plates. In addition, the stator core 310 can be formed by coupling or connecting a plurality of separate cores. An insulator 320 can be installed on the teeth of the stator core 310. Coils 330 can be wound around the insulator 320.

[0053] In the housing 400, a space for accommodating the rotor 200 and the stator 300 is formed. The housing 400 can be formed of a metal material.

[0054] The housing 400 can include a housing body 410 and a housing cover 420. The housing body 410 can be formed in a cylindrical shape having an open upper side portion. The housing cover 420 can cover the open upper portion of the housing body 410. Bearings 500 are provided on each of the housing body 410 and the housing cover 420.

[0055] The bearings 500 rotatably support the shaft 100. The bearings 500 can be coupled to the upper end portion and the lower end portion of the shaft 100. In this case, the bearing 500 coupled to the upper end portion of the shaft 100 can be provided on the housing cover 420, and the bearing 500 coupled to the lower end portion of the shaft 100 can be provided on the housing body 410.

[0056] Figure 2 and Figure 3 is a view illustrating a protrusion of a stator core, an insulator, and a stator provided in a motor according to an embodiment.

[0057] Referring to Figure 2The insulator 320 is coupled to the stator core 310. The insulator 320 is provided as a plurality of insulators 320. The insulator 320 can include a body 321 and a guide 322. The body 321 is a portion around which the coil 330 is wound and disposed. The body 321 can include a plurality of grooves recessed formed. In this case, the grooves can guide the arrangement of the coil. The guide 322 extends from the body 321. The guide 322 prevents the wound coil 330 from being separated. In this case, the length of the guide 322 can be greater than the length of the body 321 in the axial direction. In this case, the upper end of the guide 322 can protrude upward more than the upper end of the body 321. Also, the lower end of the guide 322 can protrude downward more than the lower end of the body 321.

[0058] The protrusion 340 extends from the lower end of the insulator 320. In this case, the protrusion 340 can extend from the guide 322. The protrusion 340 can include a first protrusion 341 and a second protrusion 342. The first protrusion 341 can extend from one side of the lower end of the guide 322. Also, the second protrusion 342 can extend from the other side of the lower end of the guide 322. The first protrusion 341 and the second protrusion 342 can be disposed apart from each other in the circumferential direction. In this case, a separation space can be formed between the first protrusion 341 and the second protrusion 342.

[0059] Referring to Figure 3 The guide 322 can include a first guide 322A and a second guide 322B.

[0060] The first guide 322A extends from the inner side of the body 321. Also, the second guide 322B extends from the outer side of the body 321. That is, the first guide 322A is disposed closer to the axial center C than the second guide 322B. The first guide 322A and the second guide 322B are spaced apart from each other with the body 321 interposed therebetween in the radial direction. In this case, the width of the first guide 322A in the circumferential direction can be less than the width of the second guide 322B in the circumferential direction.

[0061] The protrusion 340 can extend from the first guide 322A and the second guide 322B. The protrusion 340 can include a first portion 340A and a second portion 340B. The first portion 340A extends from the lower end of the first guide 322A. Also, the second portion 340B extends from the lower end of the second guide 322B. The first portion 340A and the second portion 340B are spaced apart from each other in the radial direction. In this case, the first portion 340A is disposed closer to the axial center C than the second portion 340B.

[0062] Figure 4is a cross-sectional perspective view illustrating a housing body, Figure 5 is a plan view illustrating a state in which an insulator is disposed on a housing body of a motor according to an embodiment, and Figure 6 is a partial perspective view illustrating a state in which an insulator is disposed in a housing body of a motor according to an embodiment.

[0063] Referring to Figure 4 , the housing body 410 can include a side surface 411, a lower surface 412, and a bearing recess portion 413.

[0064] The side surface 411 can have a cylindrical shape. The rotor 200 and the stator 300 are disposed inside the side surface 411. The cover 420 can be coupled to an upper end portion of the side surface 411. In addition, the lower surface 412 can extend inward from a lower end portion of the side surface 411. The lower surface 412 and the side surface 411 are disposed perpendicular to each other. The bearing recess portion 413 can be disposed in a central portion of the lower surface 2. The bearing 500 can be disposed inside the bearing recess portion 413. The bearing recess portion 413 can be disposed to surround the lower surface and the side surface of the bearing 500. In this case, a hole through which the shaft 100 passes can be formed in a bottom surface of the bearing recess portion 413.

[0065] A protrusion portion 430 can be disposed on the lower surface 412. The protrusion portion 430 can have a rib shape. The protrusion portion 430 can be disposed as a plurality of protrusion portions 430. The plurality of protrusion portions 430 can be radially disposed. The protrusion portion 430 can connect the side surface 411 and the bearing recess portion 413 in a radial direction.

[0066] Referring to Figure 5 , the insulator 320 can be disposed above the protrusion portion 430. In this case, a virtual line L1 connecting the axial center C and the center of the width of the protrusion portion 430 can be the same as a virtual line L2 connecting the axial center C and the center of the width of the body 321 of the insulator 320.

[0067] Referring to Figure 6At least a portion of the protruding portion 430 can be disposed in a separation space between the protrusions 340. In this case, at least a portion of the protrusions 340 can overlap the protruding portion 430 in the circumferential direction. Thus, movement of the protruding portion 430 in the circumferential direction with respect to the insulator 320 can be restricted due to the protrusions 340. In this case, a separation distance between the protrusions 340 can be formed to be greater than a width of the protruding portion 430. The protruding portion 430 can be spaced apart from the protrusions 340 in the circumferential direction. For example, the protruding portion 430 can be spaced apart from the insulator 320 by 0.2 mm to 1 mm in the circumferential direction. Thus, the protruding portion 430 can move by a separation distance in the circumferential direction with respect to the insulator 320. However, when the protruding portion 430 moves by 1 mm or more in the circumferential direction with respect to the insulator 320, the protruding portion 430 can be hooked on the protrusions 340, and movement of the protruding portion 430 can be restricted.

[0068] Figure 7 FIG. 4 is a view illustrating a first portion viewed from an axial center of the stator.

[0069] Referring to Figure 7 The first portion 340A can include a 1-1 protrusion 341A and a 1-2 protrusion 342A. The 1-1 protrusion 341A can extend from one side of a lower end portion of the first guide 322A. Also, the 1-2 protrusion 342A can extend from the other side of the lower end portion of the first guide 322A. A width W1 of the 1-1 protrusion 341A in the circumferential direction can be the same as a width W2 of the 1-2 protrusion 342A in the circumferential direction.

[0070] The 1-1 protrusion 341A and the 1-2 protrusion 342A can be disposed apart from each other in the circumferential direction. In this case, a separation distance D1 between the 1-1 protrusion 341A and the 1-2 protrusion 342A can be greater than the width W1 of the 1-1 protrusion 341A in the circumferential direction or the width W2 of the 1-2 protrusion 342A in the circumferential direction. Also, surfaces of the 1-1 protrusion 341A and the 1-2 protrusion 342A facing each other can be formed as inclined surfaces S. In this case, the inclined surfaces S can be formed on lower end portion portions of the 1-1 protrusion 341A and the 1-2 protrusion 342A. In this case, the inclined surfaces S can further apart from each other toward the lower side portion.

[0071] Figure 8 FIG. 5 is a view illustrating a state of a second portion viewed from an outer side.

[0072] Referring to Figure 8The second portion 340B can include a 2-1 protrusion 341B and a 2-2 protrusion 342B. The 2-1 protrusion 341B can extend from one side of the lower end portion of the second guide 322B. Also, the 2-2 protrusion 342B can extend from the other side of the lower end portion of the second guide 322B. A width W4 of the 2-1 protrusion 341B in the circumferential direction can be the same as a width W3 of the 2-2 protrusion 342B in the circumferential direction. The 2-1 protrusion 341B and the 2-2 protrusion 342B can be disposed apart from each other in the circumferential direction. In this case, a separation distance D2 between the 2-1 protrusion 341B and the 2-2 protrusion 342B can be less than the width W4 of the 2-1 protrusion 341B in the circumferential direction or the width W3 of the 2-2 protrusion 342B in the circumferential direction. Also, surfaces of the 2-1 protrusion 341B and the 2-2 protrusion 342B facing each other can be formed as inclined surfaces S. In this case, the inclined surfaces S of the 2-1 protrusion 341B and the 2-2 protrusion 342B can be formed on the lower end portion. In this case, the inclined surfaces S can further apart from each other toward the lower side.

[0073] Figure 9 is a side view illustrating a first portion, a second portion, and a protruding portion, Figure 10 is a cross-sectional view taken along Figure 9 line AA' of FIG. 3, Figure 11 is a cross-sectional view taken along Figure 9 line BB' of FIG. 3.

[0074] Referring to Figure 9 , the first guide 322A and the second guide 322B can be disposed apart from each other in the radial direction. In this case, a direction from the second guide 322B toward the first guide 322A is an inward direction in the radial direction, and a direction from the first guide 322A toward the second guide 322B is an outward direction in the radial direction. In this case, a convex step 323 can be formed on an outer surface of the body 321. In this case, the convex step 323 can be disposed below the body 321.

[0075] The first portion 340A can extend from a lower end portion of the first guide 322A, and the second portion 340B can extend from a lower end portion of the second guide 322B. The first portion 340A and the second portion 340B can be disposed apart from each other in the radial direction. A separation distance between the first portion 340A and the second portion 340B can be the same as a length of the body 321 in the radial direction. In this case, at least a portion of the first portion 340A and at least a portion of the second portion 340B can overlap the protruding portion 430 in the circumferential direction.

[0076] The length of the first portion 340A and the length of the second portion 340B can be the same in the axial direction. Meanwhile, the thickness of the second portion 340B in the circumferential direction can be greater than the thickness of the first portion 340A in the circumferential direction. The first portion 340A can include a first inclined surface AS1. The first inclined surface AS1 can be disposed on a lower end portion of an inner surface of the first portion 340A. Also, the second portion 340B can include a second inclined surface AS2. The second inclined surface AS2 can be disposed on a lower end portion of an outer surface of the second portion 340B.

[0077] Referring to Figure 10 , the 1-1 protrusion 341A and the 1-2 protrusion 342A can be spaced apart from each other in the circumferential direction. Also, the protruding portion 430 can be disposed in a separation space between the 1-1 protrusion 341A and the 1-2 protrusion 342A. In this case, at least a portion of the 1-1 protrusion 341A and at least a portion of the 1-2 protrusion 342A can overlap the protruding portion 430 in the circumferential direction. Meanwhile, the 1-1 protrusion 341A and the 1-2 protrusion 342A do not overlap the protruding portion 430 in the radial direction.

[0078] Each of the 1-1 protrusion 341A and the 1-2 protrusion 342A can include a first area A1 and a second area A2. The first area A1 overlaps the protruding portion 430 in the circumferential direction. In this case, a lower end portion of the first area A1 is disposed at a higher level than the lower surface 412 of the housing. Based on the lower surface 412 of the housing 400, the height H1 of the first area A1 can be less than the height H2 of the protruding portion 430. Also, based on the lower surface 412 of the housing 400, the height H2 of the protruding portion 430 can be less than the height HA of the first guide 322A. The second area A2 connects the first area A1 and the first guide 322A. The second area A2 does not overlap the protruding portion 430 in the circumferential direction. In this case, the length of the second area A2 in the axial direction is less than the length of the first area A1 in the axial direction.

[0079] Referring to Figure 11 , the 2-1 protrusion 341B and the 2-2 protrusion 342B can be spaced apart from each other in the circumferential direction. Also, the protruding portion 430 can be disposed in a separation space between the 2-1 protrusion 341B and the 2-2 protrusion 342B. In this case, at least a portion of the 2-1 protrusion 341B and at least a portion of the 2-2 protrusion 342B can overlap the protruding portion 430 in the circumferential direction. Meanwhile, the 2-1 protrusion 341B and the 2-2 protrusion 342B do not overlap the protruding portion 430 in the radial direction.

[0080] Each of the 2-1 protrusion 341B and the 2-2 protrusion 342B can include a first region B1 and a second region B2. The height H3 of the first region B1 can be smaller than the height H2 of the protruding portion 430 based on the lower surface 412 of the housing 400. In addition, the height H2 of the protruding portion 430 can be smaller than the height HB of the second guide 322B based on the lower surface 412 of the housing 400. The second region B2 connects the first region B1 and the second guide 322B. The second region B2 does not overlap the protruding portion 430 in the circumferential direction. In this case, the length of the second region B2 in the axial direction is smaller than the length of the first region B1 in the axial direction.

[0081] Figure 12 is a view illustrating a modification example of the second portion shown in Figure 11

[0082] Referring to Figure 12 The 2-1 protrusion 341B and the 2-2 protrusion 342B can have different shapes. The 2-1 protrusion 341B and the 2-2 protrusion 342B can have different widths in the circumferential direction. The width W5 of the 2-1 protrusion 341B in the circumferential direction can be greater than the width W6 of the 2-2 protrusion 342B in the circumferential direction. In this case, the 2-1 protrusion 341B and the 2-2 protrusion 342B can have the same length in the axial direction.

[0083] The second guide 322B can include a plurality of first portions P1, a second portion P2, and a third portion P3. The first portion P1 can be provided as a plurality of first portions P1. The first portion P1 can overlap the 2-1 protrusion 341B or the 2-2 protrusion 342B in the axial direction. The plurality of first portions P1 can have different widths in the circumferential direction. The plurality of first portions P1 can be spaced apart from each other in the circumferential direction. The second portion P2 can be provided in a separation space between the plurality of first portions P1. The second portion P2 can overlap the protruding portion 430 in the axial direction. A lower end of the second portion P2 can be spaced apart from the upper surface of the protruding portion 430. The third portion P3 can be provided on one side of one of the plurality of first regions P1. The third portion P3 can be provided on one side of the first portion P1 of the plurality of first portions P1 having a small width in the circumferential direction. The width of the third portion P3 in the circumferential direction can be smaller than the width of the first portion P1 or the width of the second portion P2. The third portion P3 can be provided adjacent to the first portion P1 of a different adjacent second guide.

[0084] Figure 13 is a perspective view illustrating a stator of a motor according to a second embodiment.

[0085] Referring to​Figure 13 The plurality of insulators 320 can be injection-molded in a state in which the plurality of insulators 320 are connected by the bridges 350. Also, the plurality of insulators 320 can be assembled with the plurality of stator cores 310 and separated from each other. In this case, one side of the bridges of the plurality of insulators 320 can be cut. In this case, the cut bridges can be maintained in a state of protruding from the insulators 320.

[0086] The bridges 350 are formed to protrude from the guides 322 in a circumferential direction. The bridges 350 have different lengths. The bridges 350 can have a curvature with respect to the center of the stator 300. The bridges 350 can have the same separation distance from the center of the stator 300. Also, the thickness of the bridges 350 in a radial direction can decrease toward the end portions.

[0087] The bridges 350 can include first bridges 350-1 and second bridges 350-2.

[0088] The first bridges 350-1 can extend from one side of the guides 322. Also, the second bridges 350-2 can extend from the other side of the guides 322. In this case, the first bridge 350-1 of any one insulator 320 can face the second bridge 350-2 of another adjacent insulator 320. The first bridges 350-1 and the second bridges 350-2 facing each other can be spaced apart from each other in a circumferential direction. Also, the first bridges 350-1 and the second bridges 350-2 can have different lengths in the circumferential direction.

[0089] Figure 14 is a perspective view illustrating a portion of a stator.

[0090] Referring to Figure 14 The 1-1 bridges 351-1 and the 1-2 bridges 351-2 can be formed to protrude from the first guides 322A. In this case, the 1-1 bridges 351-1 can be formed to protrude from one side of the first guides 322A in a circumferential direction. Also, the 1-2 bridges 351-2 can be formed to protrude from the other side in the circumferential direction. In this case, the 1-1 bridge 351-1 of any one insulator 320 can face the 1-2 bridge 351-2 of another insulator 320 adjacent thereto.

[0091] The 2-1 bridge 352-1 and the 2-2 bridge 352-2 can be formed to protrude from the second guide 322B. The 2-1 bridge 352-1 can be formed to protrude from one side of the second guide 322B in the circumferential direction. Also, the 2-2 bridge 352-2 can be formed to protrude from the other side in the circumferential direction. In this case, the 2-1 bridge 352-1 of any one of the insulators 320 can face the 2-2 bridge 352-2 of the other insulator 320 adjacent thereto.

[0092] Figure 15 is Figure 14 a plan view.

[0093] Referring to Figure 15 , the first guide 322A can include a first surface a1 facing inward and a second surface a2 facing outward. In this case, the 1-1 bridge 351-1 and the 1-2 bridge 351-2 can be disposed between the first surface a1 and the second surface a2 in the radial direction. In this case, a first step S1 can be provided between the first surface a1 and the 1-1 bridge 351-1. Also, a first step S1 can be further provided between the first surface a1 and the 1-2 bridge 351-2. Meanwhile, a second step S2 can be provided between the second surface a2 and the 1-1 bridge 351-1. Also, a second step S2 can be further provided between the second surface a2 and the 1-2 bridge 351-2. In this case, an inclined surface can be provided at the edges of both sides of the second surface a2. The distance between the inclined surface and the first surface a1 decreases toward the end portion.

[0094] The second guide 322B can include a third surface a3 facing inward and a fourth surface a4 facing outward. In this case, the 2-1 bridge 352-1 and the 2-2 bridge 352-2 can be disposed between the third surface a3 and the fourth surface a4 in the radial direction. In this case, a third step S3 can be formed between the third surface a3 and the inner surfaces of the 2-1 bridge 352-1 and the 2-2 bridge 352-2. Also, a fourth step S4 can be further formed between the fourth surface a4 and the outer surfaces of the 2-1 bridge 352-1 and the 2-2 bridge 352-2. In this case, the third step S3 can be greater than the first step S1, and the fourth step S4 can be greater than the second step S2.

[0095] The first groove g1 and the second groove g2 can be provided in the third surface a3. The coil 330 is provided in the first groove g1 and the second groove g2. The coil 330 can be provided in the axial direction. In this case, the first groove g1 and the second groove g2 can guide the terminal end and the initial end of the wound coil 330. The first groove g1 and the second groove g2 can be provided separately from each other in the circumferential direction. The first groove g1 and the second groove g2 can be provided between the 2-1 bridge 352-1 and the 2-2 bridge 352-2 in the circumferential direction. In addition, the teeth can be provided between the first groove g1 and the second groove g2 in the circumferential direction.

[0096] The 1-1 bridge 351-1 and the 1-2 bridge 351-2 can have the same thickness in the radial direction. In addition, the 2-1 bridge 352-1 and the 2-2 bridge 352-2 can have the same thickness in the radial direction. In this case, the thickness of each of the 1-1 bridge 351-1 and the 1-2 bridge 351-2 in the radial direction can be a first thickness T1. In addition, the thickness of each of the 2-1 bridge 352-1 and the 2-2 bridge 352-2 in the radial direction can be a second thickness T2. In this case, the first thickness T1 can be smaller than the thickness of the first guide 322A. In addition, the second thickness T2 can be smaller than the thickness of the second guide 322B. The ratio of the second thickness T2 to the thickness of the second guide 322B in the radial direction can be less than 0.5. For example, the ratio of the second thickness T2 to the thickness of the second guide 322B in the radial direction can be in the range of 0.35 to 0.45. In addition, the second thickness T2 can be greater than the first thickness T1. The ratio of the first thickness T1 to the second thickness T2 can be less than 0.7. For example, the ratio of the first thickness T1 to the second thickness T2 can be less than 0.5.

[0097] In this case, each of the insulators 320 can include an upper insulator 320A and a lower insulator 320B. The upper insulator 320A and the lower insulator 320B are coupled in the axial direction. The upper insulator 320A is mounted on the upper side of the stator core 310 and surrounds the upper portion of the stator core 310, and the lower insulator 320B is mounted on the lower side of the stator core 310 and surrounds the lower portion of the stator core 310.

[0098] Figure 16 is a perspective view illustrating the upper insulator, Figure 17 is a plan view illustrating the upper insulator, and Figure 18 is Figure 17 a partial enlarged view of

[0099] Referring to Figure 16 and Figure 17The upper insulator 320A can include an upper body 320A-1, a first upper guide 320A-2, and a second upper guide 320A-3. The upper body 320A-1 surrounds the upper portion of the tooth. The first upper guide 320A-2 extends inward from the upper body 320A-1. In addition, the second upper guide 320A-3 extends outward from the upper body 320A-1. The upper end of the first upper guide 320A-2 and the upper end of the second upper guide 320A-3 can be disposed at a higher level than the upper surface of the upper body 320A-1. The bridge 350 can be formed to protrude from the first upper guide 320A-2 and the second upper guide 320A-3.

[0100] Referring to Figure 18 A 1-1 upper bridge 351-1A and a 1-2 upper bridge 351-2A can be provided on the first upper guide 320A-2. The 1-1 upper bridge 351-1A can extend in the circumferential direction from one side of the first upper guide 320A-2. In addition, the 1-2 upper bridge 351-2A can extend in the circumferential direction from the other side of the first upper guide 320A-2. In this case, the 1-1 upper bridge 351-1A and the 1-2 upper bridge 351-2A can overlap in the circumferential direction. The 1-1 upper bridge 351-1A of any one insulator 320 can face the 1-2 upper bridge 351-2A of another insulator 320 adjacent thereto.

[0101] A 2-1 upper bridge 352-1A and a 2-2 upper bridge 352-2A can be provided on the second upper guide 320A-3. The 2-1 upper bridge 352-1A can extend in the circumferential direction from one side of the second upper guide 320A-3. In addition, the 2-2 upper bridge 352-2A can extend in the circumferential direction from the other side of the second upper guide 320A-3. In this case, the 2-1 upper bridge 352-1A and the 2-2 upper bridge 352-2A can overlap in the circumferential direction. The 2-1 upper bridge 352-1A of any one insulator 320 can face the 2-2 upper bridge 352-2A of another insulator 320 adjacent thereto.

[0102] Figure 19 is a perspective view illustrating a lower insulator, Figure 20 is a bottom view illustrating the insulator, and Figure 21 is Figure 20 a partial enlarged view of

[0103] Referring to Figure 19 and Figure 20The lower insulator 320B can include a lower body 320B-1, a first lower guide 320B-2, and a second lower guide 320B-3. The lower body 320B-1 surrounds a lower portion of the tooth. The first lower guide 320B-2 extends inward from the lower body 320B-1. The second lower guide 320B-3 extends outward from the lower body 320B-1. Lower ends of the first lower guide 320B-2 and the second lower guide 320B-3 can be disposed at a lower level than a lower surface of the lower body 320B-1. The bridge 350 can be formed to protrude from the first lower guide 320B-2 and the second lower guide 320B-3.

[0104] Referring to Figure 21 The 1-1 lower bridge 351-1B and the 1-2 lower bridge 351-2B can be formed to protrude from the first lower guide 320B-2.

[0105] The 1-1 lower bridge 351-1B can extend from one side of the first lower guide 320B-2 in a circumferential direction. Also, the 1-2 lower bridge 351-2B can extend from the other side of the first lower guide 320B-2 in the circumferential direction. In this case, the 1-1 lower bridge 351-1B and the 1-2 lower bridge 351-2B can overlap in the circumferential direction. The 1-1 lower bridge 351-1B of any one insulator 320 can face the 1-2 lower bridge 351-2B of another insulator 320 adjacent thereto.

[0106] The 2-1 lower bridge 352-1B and the 2-2 lower bridge 352-2B can be formed to protrude from the second lower guide 320B-3.

[0107] The 2-1 lower bridge 352-1B can extend from one side of the second lower guide 320B-3 in a circumferential direction. Also, the 2-2 lower bridge 352-2B can extend from the other side of the second lower guide 320B-3 in the circumferential direction. In this case, the 2-1 lower bridge 352-1B and the second lower guide 320B-3 can overlap in the circumferential direction. The 2-1 lower bridge 352-1B of any one insulator 320 can face the 2-2 lower bridge 352-2B of another insulator 320 adjacent thereto.

[0108] Figure 22 is a perspective view illustrating a stator of a motor according to a third embodiment, Figure 23 is a plan view illustrating an upper insulator, and Figure 24 is a bottom view illustrating a lower insulator.

[0109] Referring to Figures 22 to 24The bridging element 350 can be disposed on the outer side of the body 321. The bridging element 350 can also be disposed on the outer guide of the insulator. In this case, the bridging element 350 is disposed on the outer side of the body 321.

[0110] The bridging member 350 can be disposed on the second upper guide member 320A-3 and the second lower guide member 320B-3. The bridging member 350 may include an upper bridging member 352-1A, an upper bridging member 352-2A, a lower bridging member 352-1B, and a lower bridging member 352-2B. The upper bridging members 352-1A and 352-2A can be formed to protrude from the second upper guide member 320A-3. In this case, the upper bridging members 352-1A and 352-2A do not overlap with the first upper guide member 320A-2 in the radial direction.

[0111] The lower bridging member 352-1B and the lower bridging member 352-2B (2-1 and 2-2 respectively) can be configured to protrude from the second lower guide member 320B-3. In this case, the lower bridging member 352-1B and the lower bridging member 352-2B (2-2 respectively) do not overlap with the first lower guide member 320B-2 in the radial direction.

[0112] Therefore, the motor according to this embodiment has the following form: wherein, from Figures 13 to 21 The upper bridging member 351-1A, the upper bridging member 351-2A, the lower bridging member 351-1B, and the lower bridging member 351-2B are omitted from the motor shown. In the motor according to this embodiment, since the bridging members are only provided on the outside of the stator, the accessibility of the cutting equipment can be improved.

[0113] In the following text, reference will be made to Figure 25 and Figure 26 A method for manufacturing a stator included in a motor according to this embodiment is described.

[0114] Figure 25 This is a flowchart describing a method for manufacturing the stator of a motor according to a second embodiment, and Figure 26 The diagram illustrates the process of... Figure 25 The diagram shows a perspective view of the state in which the stator core and insulator are connected during operation S200.

[0115] Reference Figure 25 According to an embodiment of the present invention, a method for manufacturing a stator included in a motor includes a preparation operation S100, a coupling operation S200, a cutting operation S300, a winding operation S400, and an arrangement operation S500.

[0116] First, a stator core 310 and an insulator 320 are prepared (S100). A space is formed in the insulator 320 for accommodating the stator core 310. The stator core 310 may include a yoke 311 and a plurality of teeth 312 protruding from the yoke. In this case, the yoke 311 may be configured to be separate for each tooth 312. The insulator 320 is configured as a plurality of insulators 320. In addition, the plurality of insulators 320 are connected to each other by a bridging member 350. In this case, the insulator 320 may include an insulator 320A and a lower insulator 320B.

[0117] Then, the insulator 320 is connected to the stator core 310 (S200).

[0118] Reference Figure 15 Multiple upper insulators 320A are simultaneously connected to the stator core 310 from above, and multiple lower insulators 320B are simultaneously connected to the stator core 310 from below. In this case, the multiple upper insulators 320A are integrally connected by a bridging member 350, and the multiple lower insulators 320B are integrally connected by a bridging member 350.

[0119] Then, the bridging member 350 is cut (S300). One side of each bridging member in the bridging member 350 is cut using a cutting device. Thus, the plurality of insulators can be separated. In this case, a cutting groove can be formed on one side of each bridging member. In this case, the vicinity of the cutting groove can be cut. The cut bridging member can be cut into a first bridging member extending from any one of the insulators 320 and a second bridging member extending from the other insulator.

[0120] Then, the coil is wound around each of the plurality of stator cores 310 (S400). In this case, the coil may be wound around the body of each insulator in the insulator.

[0121] Finally, the plurality of stator cores 310 are arranged (S500). The plurality of stator cores are arranged circumferentially based on the center of the stator. In this case, the separate first and second bridging members can be arranged to face each other.

[0122] In the embodiments described above, although examples of internal rotor motors have been described, the invention is not limited thereto. The invention can also be applied to external rotor motors. Furthermore, the motor can be used in various devices for vehicles or household appliances.

[0123] Figure Labels

[0124] 100: Shaft; 200: Rotor

[0125] 300: Stator; 310: Stator core

[0126] 320: insulator 320: body

[0127] 322: guide 322H: first groove

[0128] 330: coil 400: housing

[0129] 401: first step 500: bus bar

[0130] 600: cover

[0131] 610: first protruding portion

[0132] 611: first surface

[0133] 620: second protruding portion

Claims

1. A motor comprising: a shaft; a rotor coupled to the shaft; a stator disposed corresponding to the rotor; and a housing disposed outside the stator, wherein the stator includes a stator core and a plurality of insulators coupled to the stator core, wherein the plurality of insulators are separated and spaced apart from each other in a circumferential direction, wherein the insulator includes a plurality of protrusions extending in an axial direction from a lower side of a guide of the insulator, wherein the housing includes a protruding portion disposed at a lower side of the insulator and disposed on a lower surface of a housing body of the housing, wherein the plurality of protrusions are disposed apart from each other in the circumferential direction, and wherein at least a portion of the protruding portion is disposed in a separation space formed between the plurality of protrusions to prevent slippage of the insulator, wherein the insulator includes a first insulator and a second insulator adjacent to the first insulator, wherein the first insulator includes a first bridge extending toward the second insulator, wherein the second insulator includes a second bridge extending toward the first bridge, and wherein the first bridge and the second bridge disposed to face each other are spaced apart from each other. An upper end of the protruding portion is disposed at a higher level than a lower end of the protrusion.

2. The motor of claim 1, wherein, The protrusion includes:

3. The motor of claim 1, wherein, a first protrusion extending from one side of a lower end of the insulator; and a second protrusion extending from the other side of the lower end of the insulator, wherein the first protrusion and the second protrusion are disposed apart from each other in the circumferential direction such that the protruding portion is interposed between the first protrusion and the second protrusion. A separation distance between the first protrusion and the second protrusion is greater than a width of the protruding portion in the circumferential direction.

4. The motor of claim 3, wherein, 5.The motor of claim 1, wherein: the protruding portion is provided as a plurality of protruding portions; the plurality of protruding portions are disposed on the lower surface of the housing; and the plurality of protruding portions are disposed in a radial direction. The first bridge and the second bridge have the same thickness in a radial direction.

6. The motor of claim 1, wherein, A burr is formed on each of a cross section of the first bridge and a cross section of the second bridge.

7. The motor of claim 6, wherein, 8.The motor of claim 7, wherein: the stator core includes a yoke and a plurality of teeth protruding from the yoke; the insulator includes a body surrounding the teeth, the guide extending from the body; and the bridge extends from a side surface of the guide. 9.A method of manufacturing a stator included in a motor, the method comprising: a preparation operation of preparing a plurality of stator cores and a plurality of insulators connected by a plurality of bridges; a coupling operation of coupling the plurality of stator cores and the plurality of insulators; a cutting operation of cutting one side of each of the bridges; a winding operation of winding a coil around each of the plurality of stator cores; and a disposing operation of disposing the plurality of stator cores. ​ ​ wherein the plurality of insulators are separated and spaced apart from each other in a circumferential direction by a cutting operation, wherein the insulator includes a first insulator and a second insulator adjacent to the first insulator, wherein the first insulator includes a first bridge extending toward the second insulator, wherein the second insulator includes a second bridge extending toward the first bridge, and wherein the first bridge and the second bridge disposed to face each other are spaced apart from each other.

10. The method of claim 9, wherein, The cutting operation includes separating the bridge into a first bridge extending from any one insulator and a second bridge extending from another insulator.

11. A motor comprising: a shaft; a rotor coupled to the shaft; a stator disposed corresponding to the rotor; and a housing disposed outside the stator, wherein the stator includes a stator core, a plurality of insulators coupled to the stator core, and a coil wound around the insulators, wherein the plurality of insulators are separated and spaced apart from each other in a circumferential direction, wherein the insulator includes a body around which the coil is wound, a guide extending from the body in an axial direction, and a plurality of protrusions extending from a lower side of the guide in the axial direction, wherein the guide includes a first guide extending from an inner side of the body and a second guide extending from an outer side of the body, wherein the insulator further includes a first bridge extending from one side of the second guide in a circumferential direction and a second bridge extending from the other side of the second guide in the circumferential direction, wherein a first groove and a second groove are disposed in an inner surface of the second guide to be spaced apart from each other in the circumferential direction, the housing includes a protruding portion disposed at a lower side of the insulator and disposed on a lower surface of a housing body of the housing, the plurality of protrusions are disposed to be separated from each other in a circumferential direction, and at least a portion of the protruding portion is disposed in a separation space formed between the plurality of protrusions to prevent slippage of the insulator, wherein the insulator includes a first insulator and a second insulator adjacent to the first insulator, and wherein the first bridge of the first insulator extending toward the second insulator is disposed to face the second bridge of the second insulator extending toward the first bridge and is spaced apart from the second bridge.

12. The motor of claim 11, wherein, The coil is disposed in the first groove and the second groove.

13. The motor of claim 11, wherein, The first groove is disposed to be separated from the body in the circumferential direction.

14. The motor of claim 11, wherein, The first groove and the second groove are disposed between the first bridge and the second bridge.

15. The motor of claim 11, wherein, The first groove and the second groove are formed to extend from an upper side of the body to an upper end of the guide in the axial direction.

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