WO2016113846A1 - 電動機の固定子及び電動機 - Google Patents
電動機の固定子及び電動機 Download PDFInfo
- Publication number
- WO2016113846A1 WO2016113846A1 PCT/JP2015/050672 JP2015050672W WO2016113846A1 WO 2016113846 A1 WO2016113846 A1 WO 2016113846A1 JP 2015050672 W JP2015050672 W JP 2015050672W WO 2016113846 A1 WO2016113846 A1 WO 2016113846A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cover
- electric motor
- stator
- laminated core
- end surface
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/02—Casings or enclosures characterised by the material thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
Definitions
- the present invention relates to a motor stator and a motor in which a coil end protruding from an end face of a laminated core is covered with a cover.
- a motor stator having a structure in which a coil is inserted into a laminated core increases the amount of heat generated from the coil, and thus a technique for efficiently discharging the heat generated by the coil is required.
- Patent Document 1 describes a configuration in which a cover is fixed to the laminated core by fitting the laminated core and the cover together.
- Patent Document 2 describes a configuration in which an end plate on which an internal thread is formed is welded to an end surface of a laminated core, and the cover is screwed to the end plate to fix the cover to the laminated core.
- Patent Document 2 since the configuration described in Patent Document 1 fixes the cover by fitting the laminated core and the cover of the stator together, a step for fitting the cover to the laminated core is processed or a separate part. It is necessary to provide it. For this reason, productivity may fall. According to Patent Document 2, the stator becomes longer in the axial direction by the thickness of the end plate, which may hinder downsizing of the stator.
- the present invention has been made in view of the above, and obtains a stator and an electric motor for an electric motor capable of suppressing a reduction in productivity, realizing downsizing, and efficiently discharging heat. For the purpose.
- the present invention provides a laminated core in which a plurality of core members are laminated in a stator of an electric motor, and a coil from an end face in the axial direction of a central axis of the laminated core.
- a coil inserted into the laminated core with the end protruding, a cover that is formed in a cylindrical shape and surrounds the coil end and is in contact with the end surface, and a space between the coil end and the cover A resin portion for fixing the cover and the end surface; and a contact portion between the end surface and the cover; and a relative relationship between the laminated core and the cover in a direction along the end surface.
- an engaging portion for restricting movement.
- FIG. 1 is an exploded perspective view showing a stator of an electric motor according to Embodiment 1.
- FIG. Sectional drawing which shows the stator of the electric motor which concerns on Embodiment 1.
- FIG. FIG. 2 is an enlarged view showing a part of FIG. Sectional drawing which shows the stator of the electric motor which concerns on Embodiment 2.
- FIG. Sectional view along the line AA in FIG. Sectional drawing which shows the stator of the electric motor which concerns on Embodiment 3.
- FIG. Sectional drawing which shows the stator of the electric motor which concerns on Embodiment 4.
- FIG. Sectional drawing which shows the stator of the electric motor which concerns on Embodiment 5.
- FIG. 6 The figure which shows an example of the stator of the electric motor which concerns on Embodiment 6.
- FIG. 6 The figure which shows the other example of the stator of the electric motor which concerns on Embodiment 6.
- FIG. 6 The figure which shows the other example of the cover which concerns on Embodiment 6.
- FIG. 6 The figure which shows the other example of the stator of the electric motor which concerns on Embodiment 6.
- FIG. The figure which shows the other example of the cover which concerns on Embodiment 6.
- FIG. The figure which shows the other example of the stator of the electric motor which concerns on Embodiment 6.
- FIG. 6 The figure which shows the other example of the cover which concerns on Embodiment 6.
- FIG. 6 The figure which shows the other example of the stator of the electric motor which concerns on Embodiment 6.
- FIG. The figure which shows the other example of the cover which concerns on Embodiment 6.
- FIG. The figure which shows the other example of the stator of the electric motor which concerns on Embodiment 6.
- FIG. The figure which shows an example of the electric motor which concerns on Embodiment 7.
- FIG. 1 is an exploded perspective view of a stator 10 for an electric motor according to Embodiment 1 of the present invention.
- illustration of the resin part 14 is abbreviate
- FIG. 2 is a cross-sectional view showing the stator 10 of the electric motor.
- FIG. 3 is an enlarged view of the end face 11a side of the laminated core 11 in FIG.
- the stator 10 of the electric motor includes a laminated core 11 in which electromagnetic steel plates 11 g as a plurality of core members are laminated, and a coil 12 inserted into the laminated core 11.
- the stator 10 of the electric motor is filled between the cover 13 disposed on the end faces 11 a and 11 b in the axial direction of the central axis AX of the laminated core 11 and the coil ends 12 a and 12 b of the coil 12 and the cover 13.
- the engaging pin 15 which is an engaging portion for engaging the laminated core 11 and the cover 13.
- the laminated core 11 is formed in a cylindrical shape in which a plurality of electromagnetic steel plates 11g are laminated in the axial direction of the central axis AX.
- the electromagnetic steel sheet 11g is punched into a strip shape and fixed by caulking, welding, or adhesion.
- a rotor is disposed inside the laminated core 11.
- the end faces 11a and 11b of the laminated core 11 are formed in a planar shape.
- the end faces 11a and 11b are provided with an insertion hole 11e for inserting the engagement pin 15.
- the insertion hole 11e is formed to a depth equal to or greater than the length of the engagement pin 15, that is, the dimension in the axial direction of the central axis AX.
- a plurality of insertion holes 11e are arranged around the central axis AX.
- the laminated core 11 has a plurality of slots. The plurality of slots are arranged at intervals in the direction around the axis of the central axis AX.
- the coil 12 is inserted into the slot of the laminated core 11. Coil ends 12 a and 12 b of the coil 12 protrude from end faces 11 a and 11 b of the laminated core 11.
- the cover 13 is formed using a resin material having a higher electrical resistance value and thermal conductivity than the resin portion 14.
- the cover 13 is formed in a cylindrical shape.
- the cover 13 has end surfaces 13a and 13b formed at both ends in the axial direction of the central axis AX, and an inner peripheral surface 13c and an outer peripheral surface 13d formed along the direction around the axis of the central axis AX. .
- the end surface on the laminated core 11 side in the axial direction of the central axis AX is defined as an end surface 13a
- the end surface different from the end surface on the laminated core 11 side is defined as the end surface 13b.
- the end faces 13a and 13b are formed in a planar shape.
- the cover 13 is disposed in a state where the end surface 13 a is in contact with the end surfaces 11 a and 11 b of the laminated core 11.
- An insertion hole 13e for inserting the engagement pin 15 is formed in the end surface 13a.
- the insertion hole 13e is formed to a depth equal to or greater than the length of the engagement pin 15, that is, the dimension in the axial direction of the central axis AX.
- a plurality of insertion holes 13e are arranged around the central axis AX.
- the insertion hole 13e is provided at a position facing the insertion hole 11e when the cover 13 is disposed on the end surfaces 11a and 11b.
- the cover 13 is disposed so as to surround the coil ends 12a and 12b.
- An inner peripheral surface 13c of the cover 13 faces the coil ends 12a and 12b.
- the outer peripheral surface 13 d of the cover 13 coincides with the outer peripheral surface 11 d of the laminated core 11. Accordingly, the stator 10 of the electric motor has the same outer diameter from the laminated core 11 to the cover 13.
- the resin portion 14 is formed in an annular shape so as to cover the coil ends 12a and 12b and fill the spaces on the end surfaces 11a and 11b.
- the resin portion 14 includes end surfaces 14a and 14b formed on both sides in the axial direction of the central axis AX, and an inner peripheral surface 14c and an outer peripheral surface 14d formed along the direction around the axis of the central axis AX. Yes.
- the end surface 14a is bonded to the end surfaces 11a and 11b.
- the outer peripheral surface 14 d is bonded to the inner peripheral surface 13 c of the cover 13. Thereby, the resin part 14 adheres and fixes the end faces 11 a and 11 b of the laminated core 11 and the cover 13.
- the end surface 14 b is formed flush with the end surface 13 b of the cover 13.
- the inner peripheral surface 14 c coincides with the inner peripheral surface 11 c of the laminated core 11.
- the engagement pin 15 is provided for each pair of the insertion hole 11e and the insertion hole 13e facing each other. One end of the engaging pin 15 is inserted into the insertion hole 11 e of the laminated core 11, and the other end is inserted into the insertion hole 13 e of the cover 13. In a state where the engagement pin 15 is inserted into the insertion hole 11e and the insertion hole 13e, the laminated core 11 and the cover 13 are engaged via the engagement pin 15 in a direction parallel to the end surfaces 11a and 11b. Therefore, by providing the engagement pin 15, relative movement in the direction along the end surfaces 11 a and 11 b between the laminated core 11 and the cover 13 is restricted.
- the relative movement between the laminated core 11 and the cover 13 includes a relative rotational movement of the central axis AX around the axis.
- the cover 13 When manufacturing the above-described stator 10 for an electric motor, first, the cover 13 is disposed on the end faces 11a and 11b of the laminated core 11 so as to surround the coil ends 12a and 12b.
- one end of the engagement pin 15 is inserted into the insertion hole 11e of the laminated core 11, and the other end is inserted into the insertion hole 13e.
- the laminated core 11 and the cover 13 are engaged with each other in the direction along the end surfaces 11a and 11b via the engagement pin 15. Therefore, relative movement of the laminated core 11 and the cover 13 in the direction along the end surfaces 11a and 11b is restricted.
- a cylindrical member or a columnar member is inserted into the laminated core 11, and the end surface 13b of the cover 13 on the end surface 11b side is closed with a plate-like member.
- molten resin is poured into the inside of the cover 13 on the end face 11a side.
- the molten resin is supplied to the end surface 11b side through the coil 12.
- the resin portion 14 is formed by curing the molten resin in a state where the resin is filled in the space on the end surface 11a and the space on the end surface 11b.
- the coil ends 12 a and 12 b are covered with the resin portion 14. Further, the laminated core 11 and the cover 13 are bonded and fixed.
- the amount of heat generated from the stator 10 of the motor increases.
- the amount of heat generated from the coil 12 is large.
- the stator 10 of the electric motor has the cover 13 arranged in a state of covering the outer periphery of the coil ends 12a and 12b, and the coil ends 12a and 12b and the cover 13 are arranged.
- the resin portion 14 is filled in between. Thereby, the heat generated in the coil 12 is efficiently discharged to the outside from the coil ends 12 a and 12 b through the resin portion 14 and the cover 13.
- the engagement pin that engages the laminated core 11 and the cover 13 to restrict the relative movement between the laminated core 11 and the cover 13 in the direction along the end surfaces 11a and 11b. 15 is provided, the relative movement between the laminated core 11 and the cover 13 when the resin portion 14 is formed can be suppressed with a simple configuration. Thereby, since it is not necessary to fit the laminated core 11 and the cover 13 and there is no need for screw connection, it is possible to suppress a decrease in productivity.
- the stator 10 for an electric motor that can suppress a reduction in productivity, can be downsized, and can efficiently discharge the heat generated in the coil 12. can get.
- the cover 13 is formed using a resin material having an electric resistance higher than that of the resin portion 14, the coil ends 12 a and 12 b can be electrically insulated from the outside in the cover 13. Further, since the cover 13 is formed using a resin material having a higher thermal conductivity than the resin portion 14, the heat generated in the coil 12 can be efficiently discharged.
- FIG. FIG. 4 is a cross-sectional view showing the stator 20 of the electric motor according to the second embodiment.
- FIG. 5 is a diagram showing a cross section taken along line AA in FIG.
- the same components as those of the stator 10 of the electric motor according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.
- the stator 20 of the electric motor includes a laminated core 21, a coil 12 inserted into the laminated core 21, a cover 23 disposed on end surfaces 21 a and 21 b of the laminated core 21, and a coil end 12 a. , 12b and the cover 23, the resin portion 14 is provided.
- the laminated core 21 has a configuration in which a plurality of electromagnetic steel plates 21g punched in a strip shape are laminated and joined by a caulking plate 25 which is a fixed portion.
- the electromagnetic steel plate 21g is formed with a notch 21e for fitting the crimping plate 25 as an engaging portion.
- a plurality of notches 21e are formed around the central axis AX.
- the plurality of electromagnetic steel plates 21g are stacked in a state where the positions of the notches 21e are aligned. For this reason, the laminated core 21 is formed with a groove 21f along the axial direction of the central axis AX by the notch 21e of each electromagnetic steel plate 21g.
- the crimping plate 25 is pushed into the groove 21f from the outer periphery of the laminated core 21 by a crimping tool 26 shown in FIG.
- the caulking plate 25 is disposed so as to protrude from the end surface 21 a and the end surface 21 b of the laminated core 21 in the axial direction of the central axis AX.
- the cover 23 is formed with a notch 23e having a shape corresponding to the protrusions 25a and 25b.
- the protrusions 25a and 25b are fitted into the notches 23e in a state where the cover 23 is disposed on the end faces 21a and 21b of the laminated core 21.
- the protrusions 25a and 25b are fitted into the notch 23e, the laminated core 21 and the cover 23 are engaged via the protrusions 25a and 25b. Thereby, the relative movement in the direction along the end surfaces 21a and 21b between the laminated core 21 and the cover 23 is restricted.
- the relative movement between the laminated core 21 and the cover 23 includes a relative rotational movement of the central axis AX around the axis.
- the caulking plate 25 that fixes the plurality of electromagnetic steel plates 21 g protrudes from the end surfaces 21 a and 21 b of the laminated core 21, and the protruding portions 25 a and 25 b engage with the cover 23.
- the relative movement between the laminated core 21 and the cover 23 can be suppressed without changing the design of the electromagnetic steel sheet 21g.
- FIG. FIG. 6 is a diagram illustrating a stator 30 of the electric motor according to the third embodiment.
- the same components as those of the stator 10 of the electric motor according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.
- a configuration in which an electromagnetic steel plate is fixed using a through pin 35 that is an engaging portion instead of the crimping plate 25 will be described as an example.
- the stator 30 of the electric motor is disposed on the laminated core 31 in which the through hole 31 f is formed, the coil 12 inserted into the laminated core 31, and the end faces 31 a and 31 b of the laminated core 31.
- a cover 13 and a resin portion 14 filled between the coil ends 12a and 12b and the cover 13 are provided.
- the laminated core 31 has a configuration in which a plurality of electromagnetic steel plates 31g punched in a strip shape are laminated and joined by through pins 35 which are fixed portions. An insertion hole 31e for inserting the through pin 35 is formed in the electromagnetic steel plate 31g. A plurality of insertion holes 31e are formed in the direction around the central axis AX. The plurality of electromagnetic steel plates 31g are stacked in a state where the positions of the insertion holes 31e are aligned. For this reason, the laminated core 31 is formed with a through hole 31f along the axial direction of the central axis AX by the insertion hole 31e of each electromagnetic steel plate 31g.
- the penetrating pin 35 is formed longer than the height of the laminated core 31 (the distance between the end surface 31a and the end surface 31b in the axial direction of the central axis AX).
- the through pin 35 protrudes from the end surface 31a and the end surface 31b of the laminated core 31 in the axial direction of the central axis AX and is inserted into the through hole 31f.
- An insertion hole 13e for inserting the through pin 35 is formed in the end surface 13a of the cover 13.
- the protruding portions 35 a and 35 b are inserted into the insertion holes 13 e in a state where the cover 13 is disposed on the end surfaces 31 a and 31 b of the laminated core 31.
- the protruding portions 35a and 35b are inserted into the insertion hole 13e in a state where the cover 13 is disposed on the end surfaces 31 a and 31 b of the laminated core 31.
- the protruding portions 35a and 35b By inserting the protruding portions 35a and 35b into the insertion hole 13e, the laminated core 31 and the cover 13 are engaged via the protruding portions 35a and 35b. Thereby, the relative movement in the direction along the end surfaces 31a and 31b between the laminated core 31 and the cover 13 is restricted.
- the relative movement between the laminated core 31 and the cover 13 includes a relative rotational movement of the central axis AX around the
- the through pin 35 that fixes the plurality of electromagnetic steel plates 31 g protrudes from the end surfaces 31 a and 31 b of the laminated core 31, and the protruding portions 35 a and 35 b are engaged with the cover 13. Therefore, the relative movement between the laminated core 31 and the cover 13 can be suppressed without changing the design of the electromagnetic steel sheet 31g.
- FIG. FIG. 7 is a diagram illustrating a stator 40 of the electric motor according to the fourth embodiment.
- the same components as those of the stator 10 of the electric motor according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.
- a configuration in which an engaging portion is provided on an end surface of a laminated core will be described as an example.
- the stator 40 of the electric motor is formed on the laminated core 41 having the protrusion 45 that is the engaging portion, the coil 12 inserted into the laminated core 41, and the end faces 41 a and 41 b of the laminated core 41.
- the cover 13 is disposed, and the resin portion 14 filled between the coil ends 12a and 12b and the cover 13 is provided.
- the laminated core 41 has a configuration in which a plurality of electromagnetic steel plates 41g punched in a strip shape are laminated and fixed by caulking, welding, or adhesion. Projections 45 are formed on the end surfaces 41 a and 41 b of the laminated core 41.
- the said existing protrusion part may be the projection part 45.
- FIG. A plurality of the protrusions 45 are arranged in the direction around the central axis AX.
- An insertion hole 13e for inserting the protrusion 45 is formed in the end surface 13a of the cover 13.
- the insertion hole 13e is provided at a position facing the protrusion 45.
- the protruding portion 45 is inserted into the insertion hole 13 e in a state where the cover 13 is disposed on the end faces 41 a and 41 b of the laminated core 41.
- the protrusion 45 By inserting the protrusion 45 into the insertion hole 13 e, the laminated core 41 and the cover 13 are engaged via the protrusion 45. Thereby, the relative movement in the direction along the end surfaces 41a and 41b between the laminated core 41 and the cover 13 is restricted.
- the relative movement between the laminated core 41 and the cover 13 includes a relative rotational movement of the central axis AX around the axis.
- the protrusions 45 that are the engaging portions are provided on the end faces 41a and 41b of the laminated core 41, so that the laminated core 41 and the cover 13 are better than the first embodiment.
- the number of parts for engaging can be reduced. Thereby, the further improvement of productivity can be aimed at.
- FIG. FIG. 8 shows a stator 50 of the electric motor according to the fifth embodiment.
- the same components as those of the stator 10 of the electric motor according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.
- a configuration in which an engagement portion is provided on the cover side will be described as an example.
- the stator 50 of the motor includes a laminated core 11, a coil 12 inserted into the laminated core 11, a cover 53 disposed on the end faces 11a and 11b of the laminated core 11, and a coil end 12a. , 12b and the cover 53, the resin portion 14 is provided.
- the cover 53 has end surfaces 53a and 53b formed at both ends in the axial direction of the central axis AX, and an inner peripheral surface 53c and an outer peripheral surface 53d formed along the direction around the central axis AX. .
- the end surface 53a is provided with a protrusion 55 that is an engaging portion.
- the protrusion 55 protrudes toward the laminated core 11 side.
- the protrusion 55 is provided at a position facing the insertion hole 11 e of the laminated core 11.
- the protruding portion 55 is inserted into the insertion hole 11e in a state where the cover 53 is disposed on the end faces 11a and 11b of the laminated core 11.
- the protrusion 55 By inserting the protrusion 55 into the insertion hole 11 e, the laminated core 11 and the cover 53 are engaged via the protrusion 55. Thereby, the relative movement in the direction along the end surfaces 11a and 11b between the laminated core 11 and the cover 53 is restricted.
- the relative movement between the laminated core 11 and the cover 53 includes a relative rotational movement of the central axis AX around the axis.
- the protrusion 55 that is the engaging portion is provided on the end surface 53a of the cover 53, so that the laminated core 11 and the cover 53 are engaged compared to the first embodiment. It is possible to reduce the number of parts for making them. Thereby, the further improvement of productivity can be aimed at.
- FIG. FIGS. 9 to 20 are diagrams showing the configuration of the cover and the configuration of the stator of the electric motor according to the sixth embodiment.
- the same components as those of the stator 10 of the electric motor according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.
- a modification of the configuration of the inner peripheral surface of the cover will be described.
- the cover 63 shown in FIG. 9 has a groove 63e that is a recess in the inner peripheral surface 63c.
- the groove 63e is formed in an annular shape over the entire circumference of the inner peripheral surface 63c.
- a cover 63 is used for the stator 60A of the electric motor shown in FIG.
- the protruding portion 14e of the resin portion 14 protrudes outward from the outer peripheral surface 14d, and the protruding portion 14e is filled in the groove portion 63e. Thereby, it can suppress that the cover 63 remove
- the cover 64 shown in FIG. 11 has a recess 64e which is a recess on the inner peripheral surface 64c. A plurality of depressions 64e are formed in the direction around the central axis AX.
- a cover 64 is used for the stator 60B of the electric motor shown in FIG. In the stator 60B of the electric motor, the protruding portion 14e of the resin portion 14 protrudes outward from the outer peripheral surface 14d and is filled in the hollow portion 64e. Thereby, it can suppress that the cover 64 remove
- the cover 65 shown in FIG. 13 has a through hole 65e which is a recess in the inner peripheral surface 65c.
- the through hole 65e penetrates the inner peripheral surface 65c and the outer peripheral surface 65d.
- a plurality of through holes 65e are formed in the direction around the central axis AX.
- a cover 65 is used for the stator 60C of the electric motor shown in FIG. In the stator 60C of the electric motor, the protruding portion 14e of the resin portion 14 protrudes outward from the outer peripheral surface 14d and is filled in the through hole 65e. Thereby, it can suppress that the cover 65 remove
- the covers 63, 64, and 65 shown in FIGS. 9 to 14 may have a configuration in which convex portions are provided on the inner peripheral surfaces 63c, 64c, and 65c instead of the concave portions or together with the concave portions. Even in this case, it is possible to prevent the covers 63, 64, 65 from coming off in the axial direction of the central axis AX.
- the tapered portion 66e has a tapered portion 66e which is a reduced diameter portion on the inner peripheral surface 66c.
- the tapered portion 66e is formed such that the diameter of the inner peripheral surface 66c decreases from the end surface 66b of the cover 66 toward the end surface 66a.
- FIG. 15 the configuration in which the tapered portion 66e is formed over the entire inner peripheral surface 66c in the axial direction of the central axis AX is described as an example. However, the configuration is not limited thereto, and the axial direction is not limited thereto.
- the taper part 66e may be formed in a part of the inner peripheral surface 66c.
- a cover 66 is used for the stator 60D of the electric motor shown in FIG.
- the outer peripheral surface 14d of the resin portion 14 is formed along the tapered portion 66e. Therefore, the outer peripheral surface 14d of the resin portion 14 is formed to have a larger diameter from the end surface 14a toward the end surface 14b. Thereby, it can suppress that the cover 66 remove
- the cover 67 shown in FIG. 17 has a stepped portion 67e which is a reduced diameter portion on the inner peripheral surface 67c.
- the stepped portion 67e is formed such that the diameter on the end surface 67a side of the inner peripheral surface 67c is smaller than the diameter of the end surface 67b.
- FIG. 17 the configuration in which the stepped portion 67e is formed in two steps in the axial direction of the central axis AX is described as an example. However, the configuration is not limited to this, and may be formed in three or more steps.
- a cover 67 is used for the stator 60E of the electric motor shown in FIG. In the stator 60E of the electric motor, the outer peripheral surface 14d of the resin portion 14 is formed along the stepped portion 67e.
- the outer peripheral surface 14d of the resin portion 14 is formed such that the diameter of the end surface 14b is larger than the diameter on the end surface 14a side. Therefore, it can suppress that the cover 67 remove
- a cover 68 is used for the stator 60F of the electric motor shown in FIG. In the stator 60F of the electric motor, it is possible to easily maintain an insulating state between the cover 68 and the coil ends 12a and 12b. Thereby, the workability of attaching the cover 68 is improved.
- FIG. 21 is a cross-sectional view showing an example of an electric motor 70 according to the seventh embodiment.
- an electric motor 70 according to the seventh embodiment includes a stator 71, a rotor 72 disposed inside the stator 71, and a bearing 74 assembled to a shaft 73 of the rotor 72.
- the bracket 75 is press-fitted into the stator 71.
- the stator 71 shown in FIG. 21 is exemplified by the stator 10 of the electric motor described in the first embodiment, but is not limited to this, and any of the stators described in the second to sixth embodiments. A stator of such an electric motor may be used.
- heat generated in the coil 12 of the stator 71 is transferred from the coil ends 12a and 12b to the bottom surface portions 75a and 75b and the side surface portion 75c of the bracket 75 via the resin portion 14 and the cover 13. It is transmitted and discharged to the outside. Thereby, the heat generated in the coil 12 can be efficiently discharged.
- the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
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Abstract
Description
図1は、本発明の実施の形態1に係る電動機の固定子10の分解斜視図である。ただし、図1では、樹脂部14の図示を省略している。図2は、電動機の固定子10を示す断面図である。図3は、図2のうち積層コア11の端面11a側を拡大して示している。
図4は、実施の形態2に係る電動機の固定子20を示す断面図である。図5は、図4におけるA-A線に沿った断面を示す図である。実施の形態2では、実施の形態1に係る電動機の固定子10と同一の構成要素には同一の符号を付すこととし、説明を省略又は簡略化する。
図6は、実施の形態3に係る電動機の固定子30を示す図である。実施の形態3では、実施の形態1に係る電動機の固定子10と同一の構成要素には同一の符号を付すこととし、説明を省略又は簡略化する。実施の形態3では、カシメ板25に代えて、係合部である貫通ピン35を用いて電磁鋼板が固定された構成を例に挙げて説明する。
図7は、実施の形態4に係る電動機の固定子40を示す図である。実施の形態4では、実施の形態1に係る電動機の固定子10と同一の構成要素には同一の符号を付すこととし、説明を省略又は簡略化する。実施の形態4では、積層コアの端面に係合部が設けられた構成を例に挙げて説明する。
図8は、実施の形態5に係る電動機の固定子50を示す図である。実施の形態5では、実施の形態1に係る電動機の固定子10と同一の構成要素には同一の符号を付すこととし、説明を省略又は簡略化する。実施の形態5では、カバー側に係合部が設けられた構成を例に挙げて説明する。
図9から図20は、実施の形態6に係るカバーの構成及び電動機の固定子の構成を示す図である。実施の形態6では、実施の形態1に係る電動機の固定子10と同一の構成要素には同一の符号を付すこととし、説明を省略又は簡略化する。実施の形態6では、カバーの内周面の構成についての変形例を説明する。
図21は、実施の形態7に係る電動機70の一例を示す断面図である。図21に示すように、実施の形態7に係る電動機70は、固定子71と、固定子71の内側に配置された回転子72と、回転子72のシャフト73に組付けられた軸受け74と、固定子71に圧入されるブラケット75とを備えている。図21に示す固定子71は、実施の形態1に記載の電動機の固定子10を例に挙げているが、これに限定するものではなく、実施の形態2から実施の形態6に記載したいずれかの電動機の固定子が用いられてもよい。
Claims (10)
- 電動機の固定子において、
複数のコア部材が積層された積層コアと、
前記積層コアのうち中心軸の軸線方向の端面からコイルエンドが突出した状態で前記積層コアに挿入されたコイルと、
筒状に形成され、前記コイルエンドを囲い前記端面に当接して配置されたカバーと、
前記コイルエンドと前記カバーとの間に充填され、前記カバーと前記端面とを固定する樹脂部と、
前記端面と前記カバーとの当接部分に設けられ、前記端面に沿った方向への前記積層コアと前記カバーとの間の相対的な移動を規制する係合部と
を備えることを特徴とする電動機の固定子。 - 前記係合部は、一端が前記端面から前記積層コアに挿入され他端が前記カバーに挿入される係合ピンを有する
ことを特徴とする請求項1に記載の電動機の固定子。 - 前記積層コアを一方向に貫通し、複数の前記コア部材を固定する固定部を備え、
前記固定部は、前記端面から突出して設けられ、
前記係合部は、前記固定部のうち前記端面から突出した部分を含む
ことを特徴とする請求項1又は請求項2に記載の電動機の固定子。 - 前記カバーは、内周面に凹部を有し、
前記樹脂部の一部は、前記凹部に充填される
ことを特徴とする請求項1から請求項3のうちいずれか一項に記載の電動機の固定子。 - 前記凹部は、溝状に形成される
ことを特徴とする請求項4に記載の電動機の固定子。 - 前記カバーは、内周側と外周側とを貫通する貫通孔を有し、
前記樹脂部の一部は、前記貫通孔に充填される
ことを特徴とする請求項1から請求項5のうちいずれか一項に記載の電動機の固定子。 - 前記カバーは、内周面に縮径部を有し、
前記縮径部は、前記積層コア側に向けて前記内周面の径が小さく形成される
ことを特徴とする請求項1から請求項6のうちいずれか一項に記載の電動機の固定子。 - 前記カバーは、内周面に絶縁層を有する
ことを特徴とする請求項1から請求項7のうちいずれか一項に記載の電動機の固定子。 - 前記カバーは、前記樹脂部よりも電気抵抗値及び熱伝導率が高い樹脂材料を用いて形成される
ことを特徴とする請求項1から請求項8のうちいずれか一項に記載の電動機の固定子。 - 請求項1から請求項9のうちいずれか一項に記載の電動機の固定子を備えたことを特徴とする電動機。
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JP7436266B2 (ja) | 2020-04-02 | 2024-02-21 | ファナック株式会社 | 固定子及び電動機 |
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