WO2022209780A1 - レゾルバ一体型軸受装置及びその製造方法 - Google Patents
レゾルバ一体型軸受装置及びその製造方法 Download PDFInfo
- Publication number
- WO2022209780A1 WO2022209780A1 PCT/JP2022/011033 JP2022011033W WO2022209780A1 WO 2022209780 A1 WO2022209780 A1 WO 2022209780A1 JP 2022011033 W JP2022011033 W JP 2022011033W WO 2022209780 A1 WO2022209780 A1 WO 2022209780A1
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- WIPO (PCT)
- Prior art keywords
- stator
- resolver
- bearing device
- stator core
- holder
- Prior art date
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- 238000000034 method Methods 0.000 title claims 2
- 230000002093 peripheral effect Effects 0.000 claims description 39
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- 238000005520 cutting process Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 14
- 238000005096 rolling process Methods 0.000 description 13
- 230000004907 flux Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000012212 insulator Substances 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
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- 229910000976 Electrical steel Inorganic materials 0.000 description 1
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- 238000001746 injection moulding Methods 0.000 description 1
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- 238000010030 laminating Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
- G01D5/2046—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by a movable ferromagnetic element, e.g. a core
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/22—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with arrangements compensating for thermal expansion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/44—Selection of substances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/004—Electro-dynamic machines, e.g. motors, generators, actuators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K24/00—Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/20—Thermal properties
- F16C2202/22—Coefficient of expansion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/10—Force connections, e.g. clamping
- F16C2226/12—Force connections, e.g. clamping by press-fit, e.g. plug-in
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/30—Material joints
- F16C2226/40—Material joints with adhesive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/50—Positive connections
- F16C2226/52—Positive connections with plastic deformation, e.g. caulking or staking
- F16C2226/54—Positive connections with plastic deformation, e.g. caulking or staking with rivets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Definitions
- the present invention relates to a resolver-integrated bearing device having a resolver capable of detecting the rotation angle of a rotating shaft.
- Patent Document 1 a stator provided with a plurality of protrusions on the outer periphery is press-fitted and fixed to a case member formed by press working, and the case member is bolted to a housing to receive the influence of distortion of the case member.
- a resolver is disclosed in which the stator can be attached without Further, in Patent Document 2, a stator is press-fitted to the inner peripheral surface of the outer ring of a rolling bearing, and an eccentric cylindrical rotor is provided at a position facing the stator on the outer peripheral surface of the inner ring.
- a rolling bearing unit is disclosed.
- the stator is press-fitted and fixed in a case member made of a plate material that is thin enough to be pressed, so the case member may deform and the stator may become eccentric. For this reason, the possibility that the detection accuracy is lowered cannot be ruled out, and there is room for improvement.
- the case member is bolted to the housing in order to prevent creep, there are problems such as an increase in the number of parts, a size increase, and a weight increase.
- the stator is press-fitted and fixed to the inner peripheral surface of the outer ring, so depending on the state of press-fitting, the stator may creep on the outer ring and affect the detected angle. was there.
- the present invention has been made in view of the above-mentioned problems, and its object is to provide a resolver-integrated bearing device and a method of manufacturing the same in which the stator core of the stator is improved in handleability and detection accuracy. .
- a bearing that rotatably supports a rotating shaft with respect to a housing; a rotor attached to the rotating shaft; a stator disposed radially outward of the rotor with a gap therebetween; , wherein a stator core of the stator is integrally mounted with the bearing.
- a resolver-integrated bearing device comprising: The resolver-integrated bearing device, wherein the stator holder is made of synthetic resin, is fixed to the inner peripheral surface of the outer ring, and is fitted to the outer peripheral surface of the stator core.
- a bearing that rotatably supports the rotating shaft with respect to the housing; a rotor attached to the rotating shaft; a stator disposed radially outward of the rotor with a gap therebetween; a stator holder that is attached to the outer ring of the bearing and holds the stator core of the stator;
- a resolver-integrated bearing device comprising: The stator core is fixed to the stator holder by rivets, Resolver integrated bearing device.
- a manufacturing method for a resolver-integrated bearing device. [5] a bearing that rotatably supports the rotating shaft with respect to the housing; a rotor attached to the rotating shaft; a stator disposed radially outward of the rotor with a gap therebetween; a stator holder that is attached to the outer ring of the bearing and holds the stator core of the stator;
- a resolver-integrated bearing device comprising: The housing is fitted to the outer ring of the bearing and covers the outer peripheral surface of the stator holder, and a notch groove is formed in a part of the portion covering the outer peripheral surface of the stator holder in the circumferential direction, The stator holder is made of synthetic resin and has a creep prevention protrusion that engages with the cutout groove of the housing.
- Resolver integrated bearing device is
- the resolver-integrated bearing device and the manufacturing method thereof of the present invention it is possible to improve the handleability and detection accuracy of the stator core of the stator.
- FIG. 4 is a cross-sectional view of the resolver-integrated bearing device according to one embodiment of the present invention, and is a cross-sectional view taken along the line II of FIG. 3;
- FIG. 2 is a view of the resolver-integrated bearing device shown in FIG. 1 as viewed from arrow II.
- FIG. 2 is a view of the resolver-integrated bearing device shown in FIG. 1 as viewed from arrow III.
- 1 is an exploded perspective view of a resolver-integrated bearing device;
- FIG. 4 is a cross-sectional view of the resolver-integrated bearing device according to one embodiment of the present invention, and is a cross-sectional view taken along the line II of FIG. 3;
- FIG. 2 is a view of the resolver-integrated bearing device shown in FIG. 1 as viewed from arrow II.
- FIG. 2 is a view of the resolver-integrated bearing device shown in FIG. 1 as viewed from arrow III.
- 1 is an exploded perspective view of a
- the resolver-integrated bearing device 10 of this embodiment includes a rolling bearing 20 that rotatably supports a rotating shaft 11 with respect to a housing 50, and a motor used in, for example, a hybrid vehicle. and a resolver 30 that detects the rotation angle of the rotating shaft 11 of the generator.
- the rolling bearing 20 is fitted to an inner peripheral surface 51 of a cylindrical housing 50, and is fitted to an outer ring 21 having an outer ring raceway 21a formed on its inner peripheral surface, and to an outer peripheral surface of the rotating shaft 11, having an inner ring formed on its outer peripheral surface.
- An inner ring 22 having a raceway 22a formed thereon, and a plurality of rollers disposed between the outer ring raceway 21a and the inner ring raceway 22a and held rollably by a retainer 24 (in this embodiment, a crown-shaped retainer made of resin). and a ball 23 which is a rolling element.
- the rolling bearing 20 is not limited to a ball bearing, and may be another type of rolling bearing.
- the resolver 30 includes a rotor 31 that is fixed to the rotating shaft 11 and rotates together with the rotating shaft 11, and a stator 32 that is arranged radially outwardly of the rotor 31 with a radial gap C interposed therebetween.
- the rotor 31 has a non-circular shape with different outer diameters along the circumference so that the radial clearance C with the stator 32 changes with rotation. Therefore, when the rotating shaft 11 rotates, the rotor 31 rotates integrally, the gap between each tooth 33 of the stator 32 and the rotor 31 changes, and a voltage corresponding to the rotation angle of the rotor 31 is applied to the coil 36 of the stator 32 . can get.
- the stator 32 is formed by laminating a plurality of substantially annular silicon steel plates, a stator core 34 provided with a plurality of teeth 33 protruding radially inward on the inner peripheral surface, and an insulator on each tooth 33 of the stator core 34 .
- Each coil 36 is wound through 35 .
- the insulator 35 is made of an insulating material such as synthetic resin and insulates the teeth 33 and the coil 36 from each other. Note that the front side of the coil 36 (the right side in FIG. 1) may be covered with an annular plate-shaped cover 39 as in the present embodiment.
- a substantially rectangular box-shaped terminal block 37 is attached to the outer peripheral surface of the stator core 34 so as to protrude radially outward. is derived to the outside through
- the stator core 34 is fixed to the stator holder 40 .
- the stator holder 40 is made of synthetic resin, and has an annular plate portion 42 and an annular convex portion projecting from a radially intermediate portion on the other axial side (left side in FIG. 1) of the annular plate portion 42 toward the other axial side. 44, and an annular portion 43 extending from an outer peripheral portion on one axial side (right side in FIG. 1) of the annular plate portion 42 to one axial side.
- the annular convex portion 44 is press-fitted into an annular concave portion 21b formed in the inner peripheral surface of the outer ring 21 by notching the shoulder portion of the outer ring 21, and the stator holder 40 is fixed integrally with the outer ring 21. Thereby, the stator core 34 of the stator 32 is integrally attached to the rolling bearing 20 via the stator holder 40 .
- the annular recess 21b is formed on the opposite side of the ball 23 from the annular portion of the crown retainer 24 in the axial direction. That is, the resolver 30 is arranged on the pocket opening side of the crown-shaped retainer 24 made of resin via the stator holder 40 .
- the retainer if an iron retainer is used as the retainer, magnetic flux may be disturbed if the iron retainer, which is a magnetic material, is close to the resolver 30 , which may affect the detection accuracy of the resolver 30 . In that case, it is necessary to increase the bearing width and separate the resolver 30 from the iron retainer, which may increase the size and cost. Therefore, by arranging the resolver 30 on the pocket opening side of the crown-shaped retainer 24 made of resin as in the present embodiment, the above problem can be solved.
- a stator storage portion 41 having a substantially L-shaped cross section is formed by a side surface 42a on one axial side of the annular plate portion 42 and an inner peripheral surface 43a of the annular portion 43 to accommodate the stator core 34. It is When the stator core 34 is accommodated in the stator accommodation portion 41 , the outer peripheral surface 34 c of the stator core 34 is fitted to the inner peripheral surface 43 a , and the side surface 34 b on the other axial side of the stator core 34 is aligned with the side surface of the annular plate portion 42 . 42a.
- the stator holder 40 is made of synthetic resin and has a linear expansion coefficient equivalent to that of the stator core 34. As a result, even if the temperature of the resolver 30 changes, the fitting state of the stator core 34 and the stator holder 40 is less changed, and the eccentricity of the stator core 34 is suppressed to maintain good detection accuracy. Further, if the stator holder 40 is formed by injection molding, other parts attached to the stator holder 40 can be molded at the same time, and the number of parts can be reduced.
- the stator core 34 is fitted in the stator storage portion 41 with clearance, centered with respect to the rotor 31 , and then fixed to the stator holder 40 with a plurality of rivets 52 .
- the rivet 52 is inserted through a rivet hole 34a provided on the outer peripheral side of the stator core 34 and a rivet hole 42b axially penetrating the annular plate portion 42 from a side surface 42a on one axial side of the annular plate portion 42.
- the stator core 34 is fixed to the stator holder 40 by crimping from both sides.
- radial grooves 47 are provided radially outward corresponding to the rivet holes 42b, and the crimped rivets 52 head portions 52a are aligned with both side surfaces of the stator holder 40. are configured so that they do not protrude from the
- the rivets 52 are placed between the coils 36 to reduce the influence on the magnetic flux. Furthermore, by setting the number of rivet holes 34a into which the rivets 52 are inserted to be 1/N (N: integer) of the number of coils 36, the magnetic flux can be uniformly affected, which is preferable. Note that the number of rivet holes 34 a is greater than the number of rivets 52 in this embodiment. Also, the number of rivet holes 34a is calculated assuming that they are arranged at equal intervals in the circumferential direction without considering the area of the terminal block 37. FIG.
- the fixing of the stator core 34 and the stator holder 40 is not limited to the rivets 52, but may be by adhesion or press-fitting.
- the stator core 34 and the stator housing portion 41 are fitted with a clearance fit and adhered to the rotor 31 in a centered state in the same manner as the fixing by the rivets 52 . Therefore, no radial stress is applied from the stator holder 40 to the stator core 34, and a decrease in accuracy due to eccentricity of the stator core 34 is prevented.
- the stator core 34 is press-fitted into the stator housing portion 41, but by making the stator holder 40 made of resin, the radial thickness of the annular portion 43 can be easily increased. For this reason, compared with a thin plate case member formed by conventional press working, the annular portion 43 is less likely to deform, and eccentricity of the stator core 34 due to deformation of the annular portion 43 can be prevented. Therefore, a decrease in accuracy due to the eccentricity of the stator core 34 is prevented.
- the annular portion 43 has an outer peripheral surface that closely faces the inner peripheral surface 51 of the housing 50, and an inner peripheral surface 43a that is located on the inner diameter side of the outer peripheral surface of the annular convex portion 44.
- the radial thickness of the ring portion 43 is formed thick.
- stator holder 40 is configured to abut against the axial side surface 34b of the stator core 34, the axial distance between the stator core 34 and the rolling bearing 20, which is required for a case member formed by press working, is reduced. Parts such as shims for securing are unnecessary, and the number of parts can be reduced.
- stator holder 40 a portion of the fitting portion that fits with the outer peripheral surface of the stator core 34 is notched in the circumferential direction to form an open groove 45 with a substantially U-shaped cross section that opens toward the stator 32 side. It is The edge of the stator holder 40 forming the open groove 45 surrounds the side surfaces 37a and 37b of the terminal block 37 and the side surface 37c on the bearing 20 side. As a result, the terminal block 37 of the stator can be protruded radially outward, and the axial thickness of the stator 32 can be reduced to contribute to compactness and weight reduction.
- a projection 46 projecting radially outward is formed on the edge of the stator holder 40 forming the open groove 45 .
- a U-shaped notch groove 53 is provided that penetrates in the radial direction and opens toward the rolling bearing 20 when viewed from above.
- the edges of the housing forming the cutout grooves 53 come into contact with the circumferential side surfaces of the projections 46 of the stator holder 40 , and the projections 46 of the stator holder 40 are engaged with the cutout grooves 53 of the housing 50 . Rotation of the stator holder 40 is prevented. Therefore, creep of the rolling bearing 20 fixed to the stator holder 40 can be prevented.
- stator holder 40 fixed to the outer ring 21 and the stator core 34 also rotate.
- the rotation of the stator core 34 directly affects the detection accuracy of the detected angle and the control of the motor based on the detected angle. In extreme cases, there is a risk that the cables and connectors of the resolver-integrated bearing device 10 may be damaged.
- the creep of the outer ring 21 can be prevented, and the deterioration of detection accuracy of the starter 32 attached to the outer ring 21 can be prevented.
- this specification discloses the following matters. (1) a bearing that rotatably supports the rotating shaft with respect to the housing; a rotor attached to the rotating shaft; a stator disposed radially outward of the rotor with a gap therebetween; , wherein a stator core of the stator is integrally mounted with the bearing. According to this configuration, it is possible to improve the handleability of the stator core of the stator.
- stator holder that is attached to the outer ring of the bearing and holds the stator core of the stator; , wherein the stator core of the stator is integrally attached to the bearing via the stator holder, the resolver-integrated bearing device according to (1). According to this configuration, it is possible to improve the handleability of the stator core of the stator.
- stator holder is made of synthetic resin, fixed to the inner peripheral surface of the outer ring, and fitted to the outer peripheral surface of the stator core.
- stator holder made of synthetic resin can increase the radial thickness of the stator holder, so that the eccentricity of the stator can be suppressed and the detection accuracy can be improved.
- the stator core is inserted into a stator storage portion that stores the stator core of the stator holder, and is fixed to the stator holder by press-fitting, bonding, or riveting.
- a terminal block to which cables to be connected to the coils of the stator are connected is attached to the outer peripheral surface of the stator core,
- the stator holder has an open groove surrounding the terminal block, Resolver-integrated bearing device according to any one of (3) to (6) According to this configuration, the axial thickness of the stator including the terminal block can be reduced, contributing to size reduction and weight reduction.
- the rivet fixes the stator core and the stator holder between coils adjacent in the circumferential direction of the stator.
- the resolver-integrated bearing device according to any one of (8) to (10). According to this configuration, the influence of the metal rivets on the magnetic flux can be reduced.
- the number of rivet holes in the stator core is 1/N the number of the plurality of coils provided in the stator.
- the housing is fitted to the outer ring of the bearing and covers the outer peripheral surface of the stator holder.
- a notch groove is formed in a part of the portion covering the outer peripheral surface of the stator holder in the circumferential direction.
- a terminal block to which cables connected to the coils of the stator are connected is attached to the outer peripheral surface of the stator core
- the stator holder includes an open groove formed by cutting a portion of a fitting portion in the circumferential direction that fits with the outer peripheral surface of the stator core so as to surround the side surface of the terminal block,
- the creep-preventing protrusion is formed by extending the edge forming the open groove radially outward.
- the resolver-integrated bearing device According to this configuration, creep of the outer ring can be prevented by using the open groove of the stator holder for arranging the terminal block attached to the stator core, and an increase in the number of parts can be suppressed.
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Abstract
Description
[1] ハウジングに対して回転軸を回転自在に支持する軸受と、
前記回転軸に取り付けられるロータと、
前記ロータの径方向外方に隙間を介して配置されるステータと、
を備え、前記ステータのステータコアが前記軸受と一体的に取り付けられる、レゾルバ一体型軸受装置。
[2] ハウジングに対して回転軸を回転自在に支持する軸受と、
前記回転軸に取り付けられるロータと、
前記ロータの径方向外方に隙間を介して配置されるステータと、
前記軸受の外輪に取り付けられ、前記ステータのステータコアを保持するステータホルダと、
を備えるレゾルバ一体型軸受装置であって、
前記ステータホルダは、合成樹脂製で、前記外輪の内周面に固定され、且つ、前記ステータコアの外周面と嵌合する、レゾルバ一体型軸受装置。
[3] ハウジングに対して回転軸を回転自在に支持する軸受と、
前記回転軸に取り付けられるロータと、
前記ロータの径方向外方に隙間を介して配置されるステータと、
前記軸受の外輪に取り付けられ、前記ステータのステータコアを保持するステータホルダと、
を備えるレゾルバ一体型軸受装置であって、
前記ステータコアは、前記ステータホルダにリベットによりに固定される、
レゾルバ一体型軸受装置。
前記ロータと前記ステータを芯出しを行った後に、前記リベットは前記ステータコアと前記ステータホルダを固定する、
レゾルバ一体型軸受装置の製造方法。
[5] ハウジングに対して回転軸を回転自在に支持する軸受と、
前記回転軸に取り付けられるロータと、
前記ロータの径方向外方に隙間を介して配置されるステータと、
前記軸受の外輪に取り付けられ、前記ステータのステータコアを保持するステータホルダと、
を備えるレゾルバ一体型軸受装置であって、
前記ハウジングは、前記軸受の外輪と嵌合すると共に、前記ステータホルダの外周面を覆い、前記ステータホルダの外周面を覆う部分における円周方向の一部には、切欠き溝が形成され、
前記ステータホルダは、合成樹脂製で、且つ、前記ハウジングの切欠き溝と係合するクリープ防止用の突起部を有する、
レゾルバ一体型軸受装置。
図1~図4に示すように、本実施形態のレゾルバ一体型軸受装置10は、ハウジング50に対して回転軸11を回転自在に支持する転がり軸受20と、例えば、ハイブリッド自動車に使用されるモータジェネレータの回転軸11の回転角度を検出するレゾルバ30とを備える。
なお、転がり軸受20は、玉軸受に限定されるものでなく、他のタイプの転がり軸受であってもよい。
したがって、回転軸11が回転するとロータ31が一体的に回転し、ステータ32の各ティース33とロータ31とのギャップが変化して、ステータ32のコイル36にロータ31の回転角度に応じた電圧が得られる。
なお、本実施形態のように、コイル36の前面側(図1において右側)は、円環板状のカバー39により覆われていてもよい。
ここで、仮に保持器として鉄製保持器が使用された場合、磁性体である鉄製保持器がレゾルバ30に近いと磁束が乱れ、レゾルバ30の検出精度に影響を及ぼす虞がある。その場合には、軸受幅を大きくして、レゾルバ30と鉄製保持器とを離して配置する必要があり、サイズアップやコストアップが懸念される。このため、本実施形態のように、樹脂製の冠型保持器24のポケット開口側にレゾルバ30を配置することで、上記課題を解決できる。
さらに、リベット52が挿入されるリベット孔34aの数を、コイル36の数の1/N(N:整数)とすることで、磁束への影響を均等にでき、好ましい。なお、本実施形態では、リベット孔34aの数は、リベット52の数よりも多い。また、リベット孔34aの数は、端子台37の領域を考慮せずに、円周方向に等間隔に配置されるものとして算出する。
さらに、ハウジング50の円周方向の一部には、径方向に貫通するとともに転がり軸受20側に開放する上面視でコの字形の切欠き溝53が設けられている。切欠き溝53を形成するハウジングの縁部は、ステータホルダ40の突起部46の周方向側面と当接して、ステータホルダ40の突起部46がハウジング50の切欠き溝53に係合することでステータホルダ40の回転が防止されている。したがって、ステータホルダ40に固定された転がり軸受20のクリープを防止することができる。
(1) ハウジングに対して回転軸を回転自在に支持する軸受と、
前記回転軸に取り付けられるロータと、
前記ロータの径方向外方に隙間を介して配置されるステータと、
を備え、前記ステータのステータコアが前記軸受と一体的に取り付けられる、レゾルバ一体型軸受装置。
この構成によれば、ステータのステータコアの取り扱い性を向上できる。
をさらに備え、前記ステータのステータコアが前記ステータホルダを介して前記軸受と一体的に取り付けられる、(1)に記載のレゾルバ一体型軸受装置。
この構成によれば、ステータのステータコアの取り扱い性を向上できる。
この構成によれば、合成樹脂製のステータホルダによって、ステータホルダの径方向厚さを厚くすることができるので、ステータの偏心を抑制することができ、検出精度を向上することができる。
この構成によれば、ステータを位置決めするためのシムを設ける必要がなく、部品点数を削減できる。
(3)又は(4)に記載のレゾルバ一体型軸受装置。
この構成によれば、ステータの偏心を抑制しつつ、確実にステータホルダに固定できる。
この構成によれば、レゾルバの温度が変化しても、ステータホルダとステータコアの位置関係に変化はなく、検出精度を良好に維持できる。
前記ステータホルダは、前記端子台を囲う開放溝を有する、
(3)~(6)のいずれかに記載のレゾルバ一体型軸受装置
この構成によれば、端子台を含むステータの軸方向厚さを薄くして、コンパクト化、軽量化に貢献できる。
この構成によれば、ステータコアとロータとの芯出しを行った後、リベットによりステータとステータホルダを確実に固定できるので、ステータの偏心を抑制することができ、検出精度を向上できる。
この構成によれば、ステータコアに対するステータホルダによる径方向応力を低減して、レゾルバの検出精度を向上させることができる。
この構成によれば、ステータコアとロータとの芯出しが容易であり、さらにステータホルダによるステータコアに対する径方向応力が低減し、検出精度が向上する。
(8)~(10)のいずれか1つに記載のレゾルバ一体型軸受装置。
この構成によれば、金属製のリベットによる磁束への影響を低減できる。
(8)~(11)のいずれか1つに記載のレゾルバ一体型軸受装置。
この構成によれば、リベット孔の数を、コイルの数の1/Nとすることで、金属製のステータコアのリベット孔による磁束への影響を均等にできる。
前記ステータホルダは、合成樹脂製で、且つ、前記ハウジングの切欠き溝と係合するクリープ防止用の突起部を有する、(2)に記載のレゾルバ一体型軸受装置。
この構成によれば、外輪のクリープを防止して、外輪に取り付けられたスタータの検出精度を良好に維持できる。
前記ステータホルダは、前記端子台の側面を囲うように、前記ステータコアの外周面と嵌合する嵌合部の円周方向の一部を切り欠いた開放溝を備え、
前記クリープ防止用の突起部は、前記開放溝を形成する縁部を径方向外側に延設することで形成される、
(13)に記載のレゾルバ一体型軸受装置。
この構成によれば、ステータコアに取り付けられた端子台を配置するためのステータホルダの開放溝を利用して、外輪のクリープを防止することができ、部品点数の増加を抑えることができる。
この構成によれば、保持器がレゾルバの磁束に影響を及ぼすことがなく、軸受装置のサイズも大型化する必要がない。
前記ロータと前記ステータを芯出しを行った後に、前記リベットは前記ステータコアと前記ステータホルダを固定する、
レゾルバ一体型軸受装置の製造方法。
この構成によれば、ロータに対するステータの偏心が小さくなり検出精度が向上する。
11 回転軸
20 軸受
21 外輪
30 レゾルバ
31 ロータ
32 ステータ
34 ステータコア
34c 外周面
36 コイル
37 端子台
37a、37b、37c 側面
40 ステータホルダ
45 開放溝
46 突起部
50 ハウジング
53 切欠き溝
C 径方向隙間
Claims (16)
- ハウジングに対して回転軸を回転自在に支持する軸受と、
前記回転軸に取り付けられるロータと、
前記ロータの径方向外方に隙間を介して配置されるステータと、
を備え、前記ステータのステータコアが前記軸受と一体的に取り付けられる、レゾルバ一体型軸受装置。 - 前記軸受の外輪に取り付けられ、前記ステータのステータコアを保持するステータホルダと、
をさらに備え、前記ステータのステータコアが前記ステータホルダを介して前記軸受と一体的に取り付けられる、請求項1に記載のレゾルバ一体型軸受装置。 - 前記ステータホルダは、合成樹脂製で、前記外輪の内周面に固定され、且つ、前記ステータコアの外周面と嵌合する、請求項2に記載のレゾルバ一体型軸受装置。
- 前記ステータホルダは、前記ステータコアの軸方向側面と当接する、請求項3に記載のレゾルバ一体型軸受装置。
- 前記ステータコアは、前記ステータホルダの前記ステータコアを収納するステータ収納部に挿入され、圧入、接着、またはリベットにより前記ステータホルダに固定される、
請求項3又は4に記載のレゾルバ一体型軸受装置。 - 前記ステータホルダは、前記ステータコアの材質と同等の線膨張係数を有する、
請求項3~5のいずれか1項に記載のレゾルバ一体型軸受装置。 - 前記ステータコアの外周面には、前記ステータのコイルに接続されるケーブル類が接続される端子台が取り付けられ、
前記ステータホルダは、前記端子台を囲う開放溝を有する、
請求項3~6のいずれか1項に記載のレゾルバ一体型軸受装置。 - 前記ステータコアは、前記ステータホルダにリベットによりに固定される、請求項2に記載のレゾルバ一体型軸受装置。
- 前記ステータホルダは、樹脂製である、請求項8に記載のレゾルバ一体型軸受装置。
- 前記ステータのステータコアは、前記ステータホルダに隙間ばめで嵌合されている、請求項8又は9に記載のレゾルバ一体型軸受装置。
- 前記リベットは、前記ステータの周方向で隣接するコイル間において、前記ステータコアと前記ステータホルダを固定する、
請求項8~10のいずれか1項に記載のレゾルバ一体型軸受装置。 - 前記ステータコアのリベット孔の数は、前記ステータに設けられた複数のコイルの数の1/Nである、
請求項8~11のいずれか1項に記載のレゾルバ一体型軸受装置。 - 前記ハウジングは、前記軸受の外輪と嵌合すると共に、前記ステータホルダの外周面を覆い、前記ステータホルダの外周面を覆う部分における円周方向の一部には、切欠き溝が形成され、
前記ステータホルダは、合成樹脂製で、且つ、前記ハウジングの切欠き溝と係合するクリープ防止用の突起部を有する、請求項2に記載のレゾルバ一体型軸受装置。 - 前記ステータコアの外周面には、前記ステータのコイルに接続されるケーブル類が接続される端子台が取り付けられ、
前記ステータホルダは、前記端子台の側面を囲うように、前記ステータコアの外周面と嵌合する嵌合部の円周方向の一部を切り欠いた開放溝を備え、
前記クリープ防止用の突起部は、前記開放溝を形成する縁部を径方向外側に延設することで形成される、
請求項13に記載のレゾルバ一体型軸受装置。 - 前記軸受は、樹脂製保持器を有する、請求項3~14のいずれか1項に記載のレゾルバ一体型軸受装置。
- 請求項8~12、15のいずれか1項に記載のレゾルバ一体型軸受装置の製造方法であって、
前記ロータと前記ステータを芯出しを行った後に、前記リベットは前記ステータコアと前記ステータホルダを固定する、
レゾルバ一体型軸受装置の製造方法。
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JP2021062265A (ja) | 2015-10-30 | 2021-04-22 | ジョンソン・アンド・ジョンソン・コンシューマー・インコーポレイテッドJohnson & Johnson Consumer Inc. | 単位用量無菌エアロゾルミスト噴霧装置 |
JP2021010219A (ja) * | 2019-06-28 | 2021-01-28 | ミネベアミツミ株式会社 | ステータコアの取付構造およびレゾルバ |
JP2021062264A (ja) | 2021-01-19 | 2021-04-22 | 株式会社藤商事 | 遊技機 |
JP2021062263A (ja) | 2021-01-19 | 2021-04-22 | 株式会社三洋物産 | 遊技機 |
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EP4317718A1 (en) | 2024-02-07 |
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