Rotating electric machine and washing machine including the same

Abstract

To provide a rotary electric machine which can be reduced in size and cost.SOLUTION: The stator includes a first insulating resin substrate 110 covering a stator core 101, a second insulating resin substrate 120, and an insulating sheet 130 covering the inside of a slot 104. The first insulating resin substrate 110 includes a first plane protection part 112 covering the surface of the teeth part 103, and a first regulation projection 117 provided at a part covering the tip part of the teeth part 103 and regulating the insulating sheet 130. The second insulating resin substrate 120 includes a second plane protection part 122 covering the surface of the teeth part 103, and a second regulation projection 127 provided at a part covering the tip end part of the teeth part 103 and regulating the insulating sheet 130. The first regulating protrusions 117 are located on the side opposite to the stator core in the axial direction with respect to the surface of the first plane protection part 112 on the side opposite to the stator core, and the second regulating protrusions 127 are located on the side opposite to the stator core in the axial direction with respect to the surface of the second plane protection part 122 on the side opposite to the stator core.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a rotating electric machine and a washing machine including the same. [Background technology]

[0002] An electric motor (rotating electric machine) has a stator and a rotor. The stator has a stator core made of multiple laminated electromagnetic steel sheets and a stator winding. The stator core has an annular back yoke and multiple teeth that protrude from the back yoke toward the rotor. Coil end insulating members are arranged on both axial ends of the teeth to cover them. Wall insulating members are arranged on the circumferential side walls of the teeth and the inner wall of the back yoke to cover them. Stator windings are wound around the teeth via the coil end insulating members and the wall insulating members.

[0003] The circumferential side walls of the teeth and the inner wall of the back yoke are carved out to form stepped portions, and the peripheral edges of the coil end insulating members are positioned to cover the stepped portions. The circumferential width of the teeth at the stepped portions is narrower than the rest of the teeth.

[0004] A peripheral wall is formed on the peripheral edge of the coil end insulating member, extending in the axial direction and positioned at the step. The coil end insulating member also has a protrusion that protrudes along the peripheral edge. A groove is formed between the protrusion and the peripheral edge. A wall insulating member is inserted into this groove to hold the wall insulating member. The height of the protrusion is set to half the height of the peripheral wall. This technology is described in Patent Document 1. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6742402 Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, there has been a demand for reducing the cost of electric motors, and efforts are being made to make them smaller. One way to make electric motors smaller is to reduce their axial dimensions. Reducing the axial dimensions of an electric motor requires reducing the stack thickness (number of sheets) of the laminated steel plates that make up the stator core. To achieve high performance while reducing the stack thickness of the laminated steel plates, it is necessary to reduce the proportion of stepped portions. If the height of the protrusions is reduced, they may not be able to adequately grip the wall insulating member. Additionally, it is preferable to increase the overlap between the coil end insulating member and the wall insulating member to ensure the insulation distance (surface distance) between the laminated steel plate and the stator coil.

[0007] One possible solution to this problem is to extend the peripheral edge of the coil end insulating member outward in the axial direction, ensuring the height of the protrusion and extending the wall insulating member in the axial direction, but this requires welding or the like to ensure the extended portion of the peripheral edge of the coil end insulating member, which poses a problem of making it difficult to reduce costs.As a result, with Patent Document 1, it was difficult to reduce the stack thickness of the laminated steel sheets to make it smaller and thereby reduce costs.

[0008] An object of the present invention is to provide a rotating electric machine that can be made smaller and achieves cost reduction, and a washing machine equipped with the same. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides a rotor and a stator, wherein the stator comprises a stator core consisting of an annular stator yoke portion and a plurality of teeth extending from the stator yoke portion toward the rotor side, a first insulating resin base disposed in one axial direction of the stator core, a second insulating resin base disposed in the other axial direction of the stator core, an insulating sheet disposed in a slot formed between adjacent teeth, and a fixed insulating resin wound around the teeth via the first insulating resin base, the second insulating resin base, and the insulating sheet. and a stator coil, wherein the first insulating resin base comprises a first annular portion formed in an annular shape, a first planar protective portion extending from the first annular portion toward the rotor side and covering the axial surfaces of the teeth, first side surface protective portions on both circumferential sides of the first planar protective portion, extending axially from the first planar protective portion toward the stator core side and covering the side surfaces of the teeth, and a first coil support portion on the rotor side of the first planar protective portion, extending axially from the first planar protective portion toward the opposite side to the stator core and supporting the stator coil. a first peripheral edge protection portion extending in a circumferential direction from both sides of the rotor side of the first side surface protection portion and both sides of the first coil support portion, and covering the anti-rotor side of the tip ends of the teeth and the slot openings; and a first restriction protrusion extending from the first peripheral edge protection portion to the anti-rotor side, and contacting one axial end of the insulating sheet to restrict axial movement; and the second insulating resin base comprising a second annular portion formed in an annular shape, a second flat surface protection portion extending from the second annular portion toward the rotor side and covering the axial surfaces of the teeth, and a first restriction protrusion extending from the second flat surface protection portion to the anti-rotor side of the first a second side surface protection portion on both sides of the rotor facing the stator core, extending in the axial direction from the second planar protection portion toward the anti-stator core side and covering the side surfaces of the teeth; a second coil support portion on the rotor side of the second planar protection portion, extending in the axial direction from the second planar protection portion toward the anti-stator core side and supporting the stator coil; a second peripheral protection portion extending in the circumferential direction from both sides of the rotor side of the second side surface protection portion and both sides of the second coil support portion, covering the anti-rotor side of the tip ends of the teeth and the slot openings; and a second peripheral protection portion extending from the second peripheral protection portion to the anti-rotor side,and a second restricting protrusion that comes into contact with the other axial end of the insulating sheet to restrict axial movement, wherein the first restricting protrusion is positioned axially further away from the stator core than the surface of the first flat protection part that is on the side opposite the stator core, and the second restricting protrusion is positioned axially further away from the stator core than the surface of the second flat protection part that is on the side opposite the stator core. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a rotating electric machine that can be made smaller and achieve cost reduction, and a washing machine equipped with the same. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a right-side vertical cross-sectional view showing a washing machine S according to an embodiment of the present invention. [Figure 2] FIG. 2 is a top view of a stator according to an embodiment of the present invention. [Figure 3] FIG. 2 is a top view of a rotor 200 according to an embodiment of the present invention. [Figure 4] 1 is a perspective view of the appearance of a stator 100 according to an embodiment of the present invention. [Figure 5] FIG. 1 is an exploded perspective view of a stator 100 according to an embodiment of the present invention. [Figure 6] FIG. 2 is an external perspective view of a first insulating resin base 110 according to an embodiment of the present invention, as viewed from the side opposite to the stator core. [Figure 7] FIG. 2 is an external perspective view of a first insulating resin base 110 according to an embodiment of the present invention, as viewed from the stator core side. [Figure 8] 1 is an enlarged external perspective view of a first insulating resin base 110 according to an embodiment of the present invention, viewed from the stator core side, with an insulating sheet 130 attached to a first base opening 118 of the first insulating resin base 110. FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. [Figure 10] 10 is an enlarged cross-sectional view taken along line XX in FIG. 9. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In principle, identical elements are designated by the same reference numerals in all drawings. Furthermore, descriptions of parts having identical functions will be omitted. Note that the configurations described below are merely examples, and it is not intended that the embodiments of the present invention be limited to the specific embodiments below.

[0013] In this embodiment, the direction along the shaft 203 (rotation axis) of the drive motor 10 is referred to as the "axial direction," the rotation direction centered on this axial direction is referred to as the "circumferential direction," and the direction perpendicular to the shaft 203 (rotation axis) is referred to as the "radial direction."

[0014] 1 is a right-side vertical cross-sectional view of a washing machine S according to an embodiment of the present invention. Note that, although the following description will be given taking as an example a vertical washing machine S capable of washing, rinsing, and spin-drying, the present invention can also be applied to a vertical washing / drying machine that can also perform a drying process.

[0015] The washing machine S has an outer shell formed by a housing-like outer frame 1 that defines the outer shape. Inside the outer frame 1 of the washing machine S are an outer tub 2 that stores wash water, a washing and spin-drying tub 3 (inner tub) in the outer tub 2, a rotating blade plate 4 that rotates at the bottom of the washing and spin-drying tub 3, and a drive motor 10 (rotating electric machine) that rotates the rotating blade plate 4.

[0016] The outer frame 1 is formed into a vertically elongated cylindrical shape by pressing steel plates or other sheet metal forming processes. The outer frame 1 may be formed by fastening several sheets of metal together using round head screws or engagement bolts. A synthetic resin base 32 is provided at the bottom of the outer frame 1 as a bottom plate. A synthetic resin top cover 6 is provided above the outer frame 1. By making the base 32 and the top cover 6 out of synthetic resin, leakage of electricity and electric shock from the washing machine S are suppressed.

[0017] An operation panel 6p for a user to operate the washing machine S is provided on the upper front surface of the top cover 6. The operation panel 6p is electrically connected to a control device e provided at the lower front part inside the washing machine S.

[0018] Although not shown in Fig. 1, the interior of the outer frame 1 is reinforced with reinforcing members made of rust-proof steel plates. The base 32 is also reinforced by providing lattice-shaped ribs or the like inside to increase the second moment of area.

[0019] The outer tub 2 is made of synthetic resin, for example, PP (Polypropylene), a general-purpose resin containing glass fiber. The outer tub 2 has a cylindrical shape with a bottom. An annular tub cover 2c is formed on the upper edge of the outer tub 2, with an opening facing the upper laundry insertion opening 6a. The annular tub cover 2c prevents laundry (clothes) from getting between the outer tub 2 and the washing / spin tub 3.

[0020] The outer tub 2 is supported in the center of the outer frame 1 via a vibration isolator 2b that engages with the locking portion 2k of the outer tub 2. The vibration isolator 2b has a coil spring 2s formed from a spring wire with a spring constant, and elastic rubber 2g that damps vibrations through internal friction. The outer tub 2 is suspended and supported by the vibration isolator 2b from the upper square corners of the outer frame 1, and vibration energy of the outer tub 2 is suppressed mainly by energy consumption through elastic energy by the coil spring and damping by the elastic rubber.

[0021] The washing and spin-drying tub 3 has a cylindrical shape with a bottom and contains laundry (clothes) to be washed and spin-dried. The washing and spin-drying tub 3 is provided at the center of the interior of the outer tub 2 and is supported so as to be freely rotatable within the outer tub 2. The rotation axis O of the washing and spin-drying tub 3 is arranged in a substantially vertical direction to suppress imbalance caused by gravity acting on the laundry when it rotates at high speed during spin-drying. This suppresses whirling vibrations around the rotation axis O of the washing and spin-drying tub 3.

[0022] The washing / spin-drying tub 3 has a large number of small through-holes 3a in its substantially cylindrical side wall for passing water and spin-drying. Fig. 1 shows only a representative portion of the large number of small through-holes 3a, with the rest omitted. The washing / spin-drying tub 3 also has a plurality of through-holes 3b in its bottom wall for passing wash water and rinsing water.

[0023] The upper edge of washing / spin-drying tub 3 is also provided with an annular fluid balancer 14. Fluid inside fluid balancer 14 moves to the opposite side of the laundry imbalance during high-speed rotation in the spin-drying process, thereby suppressing excessive whirling vibrations when washing / spin-drying tub 3 rotates at its natural vibration speed.

[0024] The lower part of washing / spin-drying tub 3 is formed by a shallow, bottomed cylindrical bottom plate 11. A rotating blade disk 4 is rotatably provided at the bottom of washing / spin-drying tub 3 to agitate the wash water and rinse water to perform washing, rinsing, etc. Rotating blade disk 4 is rotatably installed at the center of the bottom of washing / spin-drying tub 3. Rotating blade disk 4 rotates repeatedly in forward and reverse directions during the washing and rinsing operations.

[0025] Drive motor 10 is provided within outer frame 1 and selectively drives rotary blade plate 4 and washing / spin-drying tub 3 to rotate via electromagnetic clutch 10c. Drive motor 10 is, for example, a DC brushless motor driven by direct current. The DC brushless motor is controlled by vector control using control device e. Drive motor 10 may directly drive rotary blade plate 4 and washing / spin-drying tub 3, or may indirectly drive them using a reduction mechanism such as a belt.

[0026] An outer lid 5 is provided on the top of the outer frame 1 and can be opened and closed when the user puts laundry in or takes laundry out. The rear side of the outer lid 5 is pivotally supported by a top cover 6 provided on the top of the outer frame 1. An inner lid 5u is provided below the outer lid 5 around the rear axis so that it can be opened and closed when putting laundry in or taking laundry out. In this way, laundry is put in or taken out of the washing and spin-drying tub 3 by opening and closing the outer lid 5 and inner lid 5u and through the laundry inlet 6a.

[0027] <Water supply and drainage> A water supply unit 7 that supplies wash water and rinse water is provided within the outer frame 1, behind the outer lid 5 of the top cover 6. The water supply unit 7 has a water supply box (not shown) with multiple water channels inside. The water supply unit 7 receives wash water and rinse water from a water supply hose connection port 8 that protrudes upward from the top cover 6. Specifically, tap water or bath water is supplied from the water supply hose connection port 8 and poured into the outer tub 2. A detergent and finishing agent dispenser 36 is also provided behind the top cover 6. The detergent and finishing agent dispensed into the dispenser 36 are poured between the outer tub 2 and the washing / spin tub 3 via a dispenser hose (not shown).

[0028] Furthermore, drain port 54 provided at the rear bottom of outer tub 2 communicates with wash water drain channel 52 for draining water via normally closed drain valve 53, which is opened only during draining. Drain valve 53 is closed during the washing and rinsing operations to store wash water and rinse water in outer tub 2. Drain valve 53 opens during draining to drain the wash water, and discharges the wash water and rinse water stored in outer tub 2 from wash water drain channel 52 to the outside of washing machine S (outside the machine).

[0029] Washing machine S is equipped with water level sensor 55 that detects the water levels of wash water and rinse water stored in outer tub 2. An air trap 50 is provided near the bottom of outer tub 2. An air tube 56 is connected to and communicates with air trap 50, and a water level sensor 55 is connected to the upper end of air tube 56.

[0030] <Wash water and rinse water circulation within washing and spin tub 3> Here, at the bottom of outer tub 2, circulation water channels 51a, 61a are provided for circulating wash water and rinse water inside washing / spin-drying tub 3 from the bottom to the top.

[0031] Additionally, circulation water channels 51b and 61b are provided at the rear and front of washing and spin-drying tub 3, respectively, for circulating wash water and rinse water from the bottom to the top inside washing and spin-drying tub 3. Circulation water channels 51b and 61b are arranged symmetrically with respect to the rotation axis O of washing and spin-drying tub 3. This prevents imbalance and suppresses vibrations when washing and spin-drying tub 3 rotates at high speed during the spin-drying process.

[0032] Circulation water channels 51b and 61b are provided at the rear and front of washing / spin-drying tub 3, respectively, extending in the vertical direction.

[0033] Circulation water channel 51b and front circulation water channel 61b form a vertical flow path for showering the washing liquid remaining in outer tub 2 and washing / spin-drying tub 3 from the upper part (51c, 61c) and the central part (15a1) onto the laundry in washing / spin-drying tub 3 (arrows α03, α04, α01, α02 in Figure 1).

[0034] Further, a lint filter 33 is disposed on the inner central side of the circulating water passage 51b at the rear of the washing / spin-drying tub 3 to remove lint generated during washing and rinsing.

[0035] A shower case 15 is disposed on the central inner side of the circulating water passage 61b at the front of the washing / spin-drying tub 3 to shower water onto the laundry in the washing / spin-drying tub 3 from above (arrows α01 and α02 in FIG. 1).

[0036] A stepless shower outlet channel 15a1 with a slit-shaped cutout is formed in the shower case 15. Wash water and rinse water stored in the outer tub 2 flows from the circulation channel 61a at the bottom of the outer tub 2 into the circulation channel 61b at the front of the washing and spin-drying tub 3, and then flows upward in the circulation channel 61b.

[0037] Similarly, the wash water and rinse water stored in outer tub 2 flows from circulation water channel 51a at the bottom of outer tub 2 into circulation water channel 51b at the rear of washing and spin-drying tub 3, and flows upward within circulation water channel 51b.

[0038] A portion of the wash water that rises up circulation channel 51b at the rear of washing and spin-drying tub 3 has lint removed by lint filter 33 and enters washing and spin-drying tub 3 (arrow α04 in FIG. 1). The other portion of the wash water that rises up circulation channel 51b behind lint filter 33 is discharged from outlet 51c at the upper end of circulation channel 51, hits fluid balancer 14, and is sprayed like a shower near the center of washing and spin-drying tub 3 (arrow α03 in FIG. 1).

[0039] Meanwhile, a portion of the wash water that has risen up circulation channel 61b at the front of washing and spin-drying tub 3 is sprayed in a shower-like manner from slit-shaped, stepless shower outlet channel 15a1 in shower case 15 toward the center of washing and spin-drying tub 3 (arrow α02 in FIG. 1). The other portion of the wash water that has risen up circulation channel 61b at the rear of washing and spin-drying tub 3 further rises up circulation channel 61b, is discharged from outlet 61c at the upper end of circulation channel 61b, collides with fluid balancer 14, and is poured from above in a shower-like manner onto the laundry in washing and spin-drying tub 3 (arrow α01 in FIG. 1).

[0040] <Washing and rinsing operations> Next, the operation of the washing machine S during the washing and rinsing operations will be described.

[0041] In the washing step, first, the water supply unit 7 shown in FIG. 1 supplies water to the dispenser 36 into which the detergent has been dispensed, thereby supplying tap water or the like containing the detergent into the outer tub 2.

[0042] In the outer tub 2, the solid detergent is dissolved in tap water or the like, while the liquid detergent is diluted with tap water or the like to produce a highly concentrated detergent solution. At this time, if necessary, the drive motor 10 may rotate the rotor disk 4 to generate a water flow by the ridges 41 of the rotor disk 4, thereby producing a highly concentrated detergent solution. The water supply unit 7 stops supplying water when the water level reaches a first level, which is a low level that immerses the first blade (not shown) and second blade (not shown) on the underside (rear surface) of the rotor disk 4. Note that the first water level is preferably a low level that does not exceed the upper surface of the rotor disk 4, but may also be a level that slightly exceeds the upper surface of the rotor disk 4.

[0043] When the drive motor 10 rotates the rotor disc 4 at the first water level, the high-concentration detergent solution that has accumulated at the bottom of the outer tub 2 flows as follows: Specifically, the high-concentration detergent solution that has accumulated at the bottom of the outer tub 2 flows upward from the circulation water channel 51a at the rear bottom of the outer tub 2 through the circulation water channel 51b at the rear of the washing and spin-drying tub 3, and is supplied into the washing and spin-drying tub 3. Also, the high-concentration detergent solution that has accumulated at the bottom of the outer tub 2 flows upward from the circulation water channel 61a at the front bottom of the outer tub 2 through the washing and spin-drying tub 3 and the front circulation water channel 61b, and is supplied into the washing and spin-drying tub 3.

[0044] In this way, the highly concentrated detergent solution is circulated so that it drips onto the laundry from above (51c, 61c) and the center (15a1), while the rotor disk 4 is rotated alternately in forward and reverse directions, causing the ridge portion 41 of the rotor disk 4 to repeatedly apply an upward force to the laundry, thereby forcing it to wash (pre-wash).

[0045] Thereafter, the water supply unit 7 supplies water until the water level reaches a second high level, which is higher than the first high level, and the drive motor 10 rotates the washing and spin-drying tub 3 and the rotary blade plate 4 alternately in forward and reverse directions, and washing is performed at the high water level (main wash).

[0046] In the rinsing process, similar to the washing process, rinsing water is supplied to collect at the bottom (51a, 61a) of the outer tub 2 and circulated so that it falls on the laundry from above (arrows α01, α03 in Figure 1) and the center (arrows α02, α04 in Figure 1), while the rotor blades 4 are rotated forward and backward to remove detergent components from the laundry and rinse it.

[0047] In the next dehydration process, the drive motor 10 rotates the washing / dehydration tub 3 and the rotary blade disc 4 in one direction at high speed, and the water contained in the laundry is dehydrated by centrifugal force through the numerous small through holes 3a (see Figure 1).

[0048] Next, the configuration of the drive motor 10 (rotating electric machine) will be described. Fig. 2 is a top view of a stator according to an embodiment of the present invention. Fig. 3 is a top view of a rotor 200 according to an embodiment of the present invention. Fig. 4 is a perspective view of the appearance of a stator 100 according to an embodiment of the present invention. Fig. 5 is an exploded perspective view of a stator 100 according to an embodiment of the present invention. The stator coil 105 is omitted from Figs. 4 and 5.

[0049] The drive motor 10 (rotating electric machine) of this embodiment is composed of a stator 100 and a rotor 200 arranged inside the stator 100 in the radial direction.

[0050] In Figure 3, rotor 200 is composed of rotor core 201 made by laminating multiple electromagnetic steel plates, multiple permanent magnets 202 inserted into multiple magnet insertion holes 201a formed in rotor core 201, and shaft 203 fixed to the center of rotor core 201.

[0051] The stator 100 is composed of a stator core 101 formed by stacking multiple electromagnetic steel plates, a first insulating resin base 110 formed of insulating resin and arranged in one axial direction of the stator core 101, a second insulating resin base 120 formed of insulating resin and arranged in one axial direction of the stator core 101, an insulating sheet 130 inserted into the slot 104 and made of an insulating material such as resin, and a stator coil 105 wound around the teeth portion 103 of the stator core 101 via the first insulating resin base 110, the second insulating resin base 120 and the insulating sheet 130.

[0052] The stator core 101 is composed of a stator yoke portion 102 formed in an annular shape and a plurality of teeth 103 that extend from the stator yoke portion 102 toward the rotor side (radially inward) and are wound with stator coils 105. Slots 104 are formed between adjacent teeth 103. A plurality of slots 104 are formed in the circumferential direction, and stator coils 105 are disposed in the slots 104. Slot openings 104a that open toward the rotor side are formed in the slots 104. Tip portions 103a of the teeth 103 located on the rotor side are formed to extend in the circumferential direction.

[0053] 4 and 5, stator core 101 is composed of first stator core 101a located in one axial direction, second stator core 101b located in the other axial direction, and third stator core 101c located between first stator core 101a and second stator core 101b. The circumferential width of teeth 103 of first stator core 101a and second stator core 101b and the radial width of stator yoke 102 form narrower portions that are smaller than the circumferential width of teeth 103 of third stator core 101c and the radial width of stator yoke 102. In other words, steps are formed in slots 104 between first stator core 101a and third stator core 101c and between second stator core 101b and third stator core 101c.

[0054] 4 and 5, the stator 100 is configured by inserting an insulating sheet 130 into each of a plurality of slots 104 of the stator core 101, arranging a first insulating resin base 110 and a second insulating resin base 120 so as to face each other from both axial sides of the stator core 101, and then winding a stator coil 105 around the teeth 103 of the stator core 101 via the first insulating resin base 110, the second insulating resin base 120, and the insulating sheet 130. The axial movement of the insulating sheet 130 is restricted by a first restricting protrusion 117 of the first insulating resin base 110 and a second restricting protrusion 127 of the second insulating resin base 120.

[0055] Next, a means for restricting the axial movement of the insulating sheet 130 will be described. FIG. 6 is an external perspective view of the first insulating resin base 110 according to an embodiment of the present invention, as seen from the side opposite the stator core. FIG. 7 is an external perspective view of the first insulating resin base 110 according to an embodiment of the present invention, as seen from the stator core side. FIG. 8 is an enlarged external perspective view of the first insulating resin base 110, as seen from the stator core side, in a state in which an insulating sheet 130 is attached to a first base opening 118 of the first insulating resin base 110 according to an embodiment of the present invention. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 2. FIG. 10 is an enlarged cross-sectional view taken along line XX in FIG. 9.

[0056] The first insulating resin base 110 comprises a first annular portion 111 formed in an annular shape, a first flat surface protection portion 112 extending from the first annular portion 111 toward the rotor side and covering the axial surface of the teeth portion 103, first side surface protection portions 113 on both circumferential sides of the first flat surface protection portion 112, extending in the axial direction from the first flat surface protection portion 112 toward the stator core side and covering the side surfaces of the teeth portion 103, and first side surface protection portions 113 on the rotor side of the first flat surface protection portion 112 and extending from the first flat surface protection portion 112 toward the opposite side to the stator core. and a first peripheral edge protective portion 115 extending circumferentially from both rotor-side sides of the first side surface protective portion 113 and both sides of the first coil support portion 114 and covering the anti-rotor side of the tip portions 103a of the teeth portions 103 and the slot openings 104a; and a first yoke protective portion 116 located on the anti-rotor side of the first side surface protective portion 113 and covering the stator yoke portion 102 of the stator core 101. In addition, the first insulating resin base 110 forms a first base opening 118 corresponding to the slot 104 by the first side surface protective portion 113, the first peripheral edge protective portion 115, and the first yoke protective portion 116.

[0057] Although detailed drawings are omitted, the second insulating resin base 120, like the first insulating resin base 110, comprises a second annular portion 121 formed in an annular shape, a second flat surface protection portion 122 extending from the second annular portion 121 toward the rotor side and covering the axial surface of the tooth portion 103, second side surface protection portions 123 on both circumferential sides of the second flat surface protection portion 122, extending in the axial direction from the second flat surface protection portion 122 toward the stator core side and covering the side surface of the tooth portion 103, and a second flat surface protection portion 124 on the rotor side of the second flat surface protection portion 122. The second insulating resin base 120 is made up of a second coil support portion 124 that extends axially from the second side surface protector portion 122 toward the opposite side to the stator core and supports the stator coil 105, a second peripheral protector portion 125 that extends circumferentially from both rotor-side sides of the second side surface protector portion 123 and both sides of the second coil support portion 124 and covers the opposite-rotor side of the tip portion 103a of the tooth portion 103 and the slot opening 104a, and a second yoke protector portion 126 that is located on the opposite-rotor side of the second side surface protector portion 123 and covers the stator yoke portion 102 of the stator core 101. In addition, the second insulating resin base 120 forms a second base opening 128 that corresponds to the slot 104 by the second side surface protector portion 123, the second peripheral protector portion 125, and the second yoke protector portion 126.

[0058] When the first insulating resin base 110 is combined with the stator core 101, the first side protective portion 113, the first peripheral protective portion 115, and the first yoke protective portion 116 of the first insulating resin base 110 cover the inner surface (slot 104) of the first stator core 101a, which is the narrow portion of the stator core 101.

[0059] A first restricting protrusion 117 is formed on the first peripheral edge protective portion 115 of the first insulating resin base 110. The first restricting protrusion 117 comes into contact with one axial end of the insulating sheet 130 to restrict axial movement. The first restricting protrusion 117 extends from the first peripheral edge protective portion 115 toward the opposite rotor side, and a first flat surface 117a is formed on the surface facing the stator core. The first restricting protrusion 117 is positioned on the opposite stator core side in the axial direction from the surface of the first flat surface protective portion 112 facing the opposite stator core.

[0060] The axial positions of the first flat surface 117a of the first restricting protrusion 117 and the surface of the first flat protection portion 112 on the side opposite the stator core are aligned. In other words, the first flat surface 117a of the first restricting protrusion 117 is aligned with the circumferential extension position of the surface of the first flat protection portion 112 on the side opposite the stator core.

[0061] Similarly, when the second insulating resin base 120 is combined with the stator core 101, the second side surface protection portion 123, the second peripheral edge protection portion 125 and the second yoke protection portion 126 of the second insulating resin base 120 cover the inner surface (slot 104) of the second stator core 101b, which is the narrow portion of the stator core 101.

[0062] A second restricting protrusion 127 is formed on the second peripheral edge protective portion 125 of the second insulating resin base 120 to contact the other axial end of the insulating sheet 130 and restrict axial movement. The second restricting protrusion 127 is formed to extend from the second peripheral edge protective portion 125 toward the opposite side to the rotor, and a second flat surface 127a is formed on the surface facing the stator core. The second restricting protrusion 127 is positioned on the opposite side to the stator core in the axial direction than the surface of the second flat surface protective portion 122 facing the opposite side to the stator core.

[0063] The axial positions of the second flat surface 127a of the second restricting protrusion 127 and the surface of the second flat protection portion 122 on the side opposite the stator core are aligned. In other words, the second flat surface 127a of the second restricting protrusion 127 is aligned with the circumferential extension position of the surface of the second flat protection portion 122 on the side opposite the stator core.

[0064] Insulating sheet 130 is made of an insulating material such as resin, and is pre-shaped to fit the inner circumferential surface of slot 104. Insulating sheet 130 includes teeth protection surfaces 131 that partially overlap first side surface protection portion 113 and second side surface protection portion 123 and cover the side surfaces of teeth 103, yoke protection surfaces 132 that partially overlap first yoke protection portion 116 and second yoke protection portion 126 and cover stator yoke portion 102, teeth tip protection surfaces 133 that partially overlap first peripheral edge protection portion 115 and second peripheral edge protection portion 125 and cover tip portions 103 a of teeth 103, and slot opening protection surfaces 134 that are bent from teeth tip protection surface 133 toward the slot side (opposite the rotor side) and cover slot openings 104 a.

[0065] In this embodiment, the surface of the first flat protection portion 112 facing away from the stator core and one axial tip of the teeth protection surface 131 are positioned in the same position when viewed from the circumferential direction. Similarly, the surface of the second flat protection portion 122 facing away from the stator core and the other axial tip of the teeth protection surface 131 are positioned in the same position when viewed from the circumferential direction.

[0066] When the first insulating resin base 110 is attached to the stator core 101 and the insulating sheet 130 is inserted into the slot 104 and the first base opening 118, one of the tooth tip protection surfaces 133 and the slot opening protection surface 134 of the insulating sheet 130 comes into contact with the first flat surface 117a of the first restricting protrusion 117, as shown in Figures 8 to 10, and the axial movement of the insulating sheet 130 is restricted.

[0067] Similarly, when the second insulating resin base 120 is attached to the stator core 101 and the insulating sheet 130 is inserted into the second base opening 128, the other tooth tip protection surface 133 and slot opening protection surface 134 of the insulating sheet 130 come into contact with the second flat surface 127a of the second regulating protrusion 127, as shown in Figure 9, and the axial movement of the insulating sheet 130 is restricted.

[0068] In this embodiment, the ends of the insulating sheet 130 are in contact with the first regulating protrusion 117 formed on the first insulating resin base 110 and the second regulating protrusion 127 formed on the second insulating resin base 120, so that the axial movement of the insulating sheet 130 can be regulated with a simple configuration.

[0069] Furthermore, in this embodiment, the first restricting protrusion 117 is positioned axially closer to the stator core than the surface of the first flat protection portion 112 that faces away from the stator core, and the second restricting protrusion 127 is positioned axially closer to the stator core than the surface of the second flat protection portion 122 that faces away from the stator core, so that the first side surface protection portion 113 of the first insulating resin base 110 and the second side surface protection portion 123 of the second insulating resin base 120 can be entirely covered with the insulating sheet 130, ensuring an insulation distance (creepage distance). Therefore, even when the axial length of a rotating electric machine is shortened to make it smaller, insulation performance can be ensured, which can contribute to reducing the cost of the rotating electric machine.

[0070] The present invention is not limited to the above-described embodiments and includes various modifications. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with other configurations. [Explanation of symbols]

[0071] 1...outer frame, 2...outer tub, 2b...vibration isolation device, 2c...tub cover, 2g...elastic rubber, 2k...locking portion, 2s...coil spring, 3...washing and spin-drying tub, 3a...small through-hole, 3b...through-hole, 4...rotating blade plate, 5...outer lid, 5u...inner lid, 6...top cover, 6a...laundry inlet, 6p...operation panel, 7...water supply unit, 8...water supply hose connection port, 10...drive motor, 10c...electromagnetic clutch, 11...bottomed cylindrical bottom plate, 14...fluid balancer, 15...shower case, 15a1...stepless shower outflow path, 32... Base, 33...lint filter, 36...feeding device, 41...ridge portion, 50...air trap, 51...circulation water channel, 51a...circulation water channel, 51b...circulation water channel, 51c...discharge port, 52...washing water drain channel, 53...drain valve, 54...drain port, 55...water level sensor, 56...air tube, 61a...circulation water channel, 61b...circulation water channel, 61c...discharge port, 100...stator, 101...stator core, 101a...first stator core, 101b...second stator core, 101c...third stator core, 102...stator yaw yoke portion, 103...teeth portion, 103a...tip portion, 104...slot, 104a...slot opening, 105...stator coil, 110...first insulating resin base, 111...first annular portion, 112...first flat surface protection portion, 113...first side surface protection portion, 114...first coil support portion, 115...first peripheral edge protection portion, 116...first yoke protection portion, 117...first restricting protrusion, 117a...first flat surface, 118...first base opening, 120...second insulating resin base, 121...second annular portion, 122...second flat surface protection portion, 12 3...second side surface protective portion, 124...second coil support portion, 125...second peripheral edge protective portion, 126...second yoke protective portion, 127...second restricting protrusion, 127a...second flat surface, 128...second base opening, 130...insulating sheet, 131...teeth protective surface, 132...yoke protective surface, 133...teeth tip protective surface, 134...slot opening protective surface, 200...rotor, 201...rotor core, 201a...magnet insertion hole, 202...permanent magnet, 203...shaft, O...rotating shaft, S...washing machine, e...control device

Claims

1. a rotor and a stator, The stator includes: a stator core including a circular stator yoke and a plurality of teeth extending from the stator yoke toward the rotor; a first insulating resin base disposed in one axial direction of the stator core; a second insulating resin base disposed in the other axial direction of the stator core; an insulating sheet disposed in a slot formed between adjacent teeth; a stator coil wound around the teeth via the first insulating resin base, the second insulating resin base, and the insulating sheet; In a rotating electric machine comprising: The first insulating resin substrate is a first annular portion formed in an annular shape; a first flat surface protection portion extending from the first annular portion toward the rotor and covering an axial surface of the tooth portion; first side surface protection portions that are on both circumferential sides of the first flat surface protection portion, extend in the axial direction from the first flat surface protection portion toward the stator core, and cover side surfaces of the teeth; a first coil support portion that is located on the rotor side of the first planar protection portion and extends in the axial direction from the first planar protection portion toward the opposite side to the stator core, and supports the stator coil; a first peripheral edge protection portion extending in a circumferential direction from both rotor-side sides of the first side surface protection portion and both sides of the first coil support portion, and covering the anti-rotor side of the tip end of the tooth portion and the slot opening; a first restricting protrusion formed to extend from the first peripheral edge protection portion toward the opposite side to the rotor and contacting one axial end of the insulating sheet to restrict axial movement, The second insulating resin substrate is a second annular portion formed in an annular shape; a second flat surface protection portion extending from the second annular portion toward the rotor and covering an axial surface of the tooth portion; second side surface protection portions that are on both circumferential sides of the second flat surface protection portion, extend in the axial direction from the second flat surface protection portion toward the stator core, and cover side surfaces of the teeth; a second coil support portion that is located on the rotor side of the second planar protection portion and extends in the axial direction from the second planar protection portion toward the opposite side to the stator core, and supports the stator coil; a second peripheral edge protection portion extending in a circumferential direction from both rotor-side sides of the second side surface protection portion and both sides of the second coil support portion, and covering the anti-rotor side of the tip end of the tooth portion and the slot opening; a second restricting protrusion formed to extend from the second peripheral edge protection portion toward the opposite side to the rotor and contacting the other axial end of the insulating sheet to restrict axial movement, the first restricting protrusion is positioned on the opposite side of the stator core in the axial direction from the surface of the first flat protection portion on the opposite side of the stator core, The rotating electric machine according to claim 1, wherein the second restricting protrusion is positioned axially on the opposite side to the stator core than the surface of the second flat protection portion on the opposite side to the stator core.

2. 2. The rotating electric machine according to claim 1, the stator core is composed of a first stator core located in one axial direction, a second stator core located in the other axial direction, and a third stator core located between the first stator core and the second stator core, A rotating electric machine characterized in that the circumferential width of the teeth portions of the first stator core and the second stator core is a narrow portion that is smaller than the circumferential width of the teeth portion of the third stator core.

3. 3. The rotating electric machine according to claim 2, the first insulating resin base covers the first stator core, The rotating electric machine according to claim 1, wherein the second insulating resin base covers the second stator core.

4. 2. The rotating electric machine according to claim 1, a surface of the first planar protection portion on the side opposite to the stator core and one axial end of the insulating sheet are aligned in the axial direction; a surface of the second planar protection portion on the side opposite the stator core and the other axial end of the insulating sheet are aligned in the axial direction;

5. 2. The rotating electric machine according to claim 1, the first insulating resin base includes a first yoke protection portion that covers the stator yoke portion of the stator core, the second insulating resin base includes a second yoke protection portion that covers the stator yoke portion of the stator core, The insulating sheet is a teeth protection surface that is pre-shaped and formed to fit along an inner peripheral surface of the slot, a portion of which overlaps the first side surface protection portion and the second side surface protection portion, and covers a side surface of the teeth; a yoke protection surface that partially overlaps the first yoke protection portion and the second yoke protection portion and covers the stator yoke portion; a teeth tip protection surface that partially overlaps the first peripheral edge protection portion and the second peripheral edge protection portion and covers the tip portions of the teeth; a slot opening protection surface that is bent from the tooth tip protection surface toward the opposite side of the rotor and covers the slot opening; A rotating electric machine comprising:

6. 6. The rotating electric machine according to claim 5, a first flat surface is formed on a surface of the first restricting projection facing the stator core; a second flat surface is formed on a surface of the second restricting projection facing the stator core; the teeth tip protection surface and the slot opening protection surface of one of the insulating sheets contact the first flat surface; a second flat surface of the insulating sheet, the second flat surface being in contact with the teeth tip protection surface and the slot opening protection surface of the other insulating sheet;

7. A washing machine comprising an outer frame forming an outer shell, an outer tub arranged within the outer frame and storing wash water, an inner tub arranged within the outer tub, a rotor disk rotating at the bottom of the inner tub, and a rotary electric machine rotating the rotor disk, 7. A washing machine, wherein the rotating electric machine is the rotating electric machine according to claim 1.

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