JP5960574B2 - motor - Google Patents
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- JP5960574B2 JP5960574B2 JP2012228214A JP2012228214A JP5960574B2 JP 5960574 B2 JP5960574 B2 JP 5960574B2 JP 2012228214 A JP2012228214 A JP 2012228214A JP 2012228214 A JP2012228214 A JP 2012228214A JP 5960574 B2 JP5960574 B2 JP 5960574B2
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- washer
- bearing
- rotor
- motor according
- motor
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- 239000012212 insulator Substances 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
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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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact 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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/02—Sliding-contact bearings
- F16C23/04—Sliding-contact bearings self-adjusting
- F16C23/043—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings
- F16C23/045—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings for radial load mainly, e.g. radial spherical plain bearings
- F16C23/046—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings for radial load mainly, e.g. radial spherical plain bearings with split outer rings
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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
- F16C17/26—Systems consisting of a plurality of sliding-contact 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
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
Description
この発明は、回転子の回転軸を回転可能に支持する軸受と、回転子を軸方向に移動不能に保持するスペース部材を備えたモータに関するものである。 The present invention relates to a motor including a bearing that rotatably supports a rotating shaft of a rotor and a space member that holds the rotor in an axially immovable manner.
従来、ヨーク内で回転可能に支持された回転子に電流を供給して回転子を回転駆動するモータでは、回転子の中心軸である回転軸の端部が軸受を介してヨークに回転可能に支持されている。 Conventionally, in a motor that rotationally drives a rotor by supplying current to a rotor that is rotatably supported in the yoke, the end of the rotating shaft that is the central axis of the rotor can be rotated to the yoke via a bearing. It is supported.
また、回転子に取着されるインシュレータの端部がワッシャを介して軸受に保持されて、回転子がヨークに対し回転軸の軸方向に移動不能に保持されている。そして、回転子に電流が供給されると、ヨーク内で回転子及び回転軸が所要の回転数及び回転トルクで回転され、その回転力が回転軸から出力される。 Further, the end of the insulator attached to the rotor is held by the bearing via the washer, and the rotor is held immovably in the axial direction of the rotary shaft with respect to the yoke. When a current is supplied to the rotor, the rotor and the rotary shaft are rotated at a required rotational speed and rotational torque in the yoke, and the rotational force is output from the rotary shaft.
このようなモータでは、インシュレータと軸受との間に介在されるワッシャは、軸受と面接触している。そして、回転軸及び回転子と一体に回転するインシュレータあるいは回転子の回転に基づいてワッシャが回転されると、ワッシャは軸受に対し摺動しながら回転する。 In such a motor, the washer interposed between the insulator and the bearing is in surface contact with the bearing. When the washer is rotated based on the rotation of the insulator or the rotor that rotates integrally with the rotating shaft and the rotor, the washer rotates while sliding against the bearing.
このような状態でワッシャと軸受との間に異物が挟み込まれると、軸受に対しワッシャが傾いて面接触しない状態で回転されるため、異音を発生させることがある。
そこで、特許文献１では弾性部材の弾性力でスラットワッシャを軸受に押圧することにより、異物の挟み込みによる異音の発生を防止する構成が開示されている。
If foreign matter is sandwiched between the washer and the bearing in such a state, the washer is tilted with respect to the bearing and rotated without contact with the surface, so that abnormal noise may be generated.
In view of this, Patent Document 1 discloses a configuration that prevents the generation of abnormal noise due to foreign matter being caught by pressing a slat washer against a bearing with the elastic force of an elastic member.
特許文献２には、モータのスラストパイプと、そのスラストパイプと軸受との間に介在されるワッシャが開示されている。そして、スラストパイプには先端がワッシャに当接する複数の周壁と、その周壁間に設けられて油滴の回収を可能とする溝部が設けられた構成が開示されている。 Patent Document 2 discloses a thrust pipe of a motor and a washer interposed between the thrust pipe and a bearing. A configuration is disclosed in which the thrust pipe is provided with a plurality of peripheral walls whose tips abut against the washer, and a groove portion provided between the peripheral walls to enable oil droplets to be collected.
特許文献１に開示された構成では、異音の発生を防止するために、弾性部材を必要とするために、部品点数及び組立工数が増大する。
特許文献２に開示された構成では、軸受とワッシャが面接触しているため、異物の挟み込みによる異音の発生を防止することはできない。
In the configuration disclosed in Patent Document 1, an elastic member is required to prevent the generation of abnormal noise, and thus the number of parts and the number of assembly steps increase.
In the configuration disclosed in Patent Document 2, since the bearing and the washer are in surface contact with each other, it is not possible to prevent the generation of noise due to the foreign object being caught.
この発明の目的は、部品点数を増大させることなく、ワッシャと軸受との間での異物の挟み込みによる異音の発生を防止し得るモータを提供することにある。 An object of the present invention is to provide a motor capable of preventing the generation of abnormal noise due to foreign matter being caught between a washer and a bearing without increasing the number of parts.
上記課題を解決するモータは、ケースと回転子と回転軸とを備え、前記ケースに固定される軸受に前記回転子の前記回転軸を回転可能に支持するとともに、前記軸受と前記回転子との間に該回転子を前記回転軸の軸方向に保持するスペース部材を備えたモータにおいて、前記回転子と前記回転軸との間にはインシュレータが介在されており、前記インシュレータの前記軸受側の端部にはボス部が設けられ、該ボス部は、前記回転子が回転されるときに前記回転軸と一体回転されるものであり、前記ボス部と前記軸受との間には前記スペース部材としてワッシャが介在されており、前記ワッシャには、該ワッシャと前記軸受とを前記回転軸の周囲で周方向全周に亘って線接触させる突条が設けられており、前記ワッシャは、前記回転子が回転されるときに前記回転軸と一体回転される前記ボス部の回転にともなって回転する。 Motor for solving the above problems is provided with the case and the rotor and the rotary shaft rotatably supports the rotation shaft of the rotor bearing fixed to said casing, and said and said bearing rotor In a motor provided with a space member for holding the rotor in the axial direction of the rotary shaft between them, an insulator is interposed between the rotor and the rotary shaft, and the end of the insulator on the bearing side A boss portion is provided on the portion, and the boss portion is integrally rotated with the rotary shaft when the rotor is rotated, and the space member is provided between the boss portion and the bearing. A washer is interposed , and the washer is provided with a protrusion that makes a line contact between the washer and the bearing over the entire circumference in the circumferential direction around the rotation shaft, and the washer includes the rotor. Is rotated The rotating with the rotation of said boss portion integrally rotated with the rotary shaft Rutoki.
この構成によれば、軸受とワッシャの突条との間に異物が挟まれ難い。
上記モータについて、前記突条は、前記ワッシャの前記軸受との対向面に周方向全周に亘って設けられていることが好ましい。
According to this configuration, it is difficult for foreign matter to be sandwiched between the bearing and the protrusion of the washer .
For the motor, the projection is preferably provided over the whole circumference on the opposing surfaces of the bearing of the washer.
この構成によれば、ワッシャの突条と軸受との間に異物が挟まれ難い。
上記モータについて、前記突条を、同心円状に複数条設けることが好ましい。
この構成によれば、複数の突条でワッシャに作用する荷重を分散して受けることが可能となる。
According to this configuration, it is difficult for foreign matter to be sandwiched between the washer ridge and the bearing.
About the said motor, it is preferable to provide the said protrusion in multiple numbers concentrically.
According to this configuration, the load acting on the washer can be distributed and received by the plurality of protrusions.
上記モータについて、前記ワッシャには、前記ボス部側の面にも突条が設けられていることが好ましい。
この構成によれば、軸受に対しワッシャの表裏方向の組付け方向が限定されない。
For the motor, before Symbol washer, it is preferred that the protrusions in the surface of the boss portion side.
According to this configuration, the assembling direction of the front and back of the washer with respect to the bearing is not limited.
上記モータについて、前記突条の縦断面形状を半円形状とすることが好ましい。
この構成によれば、断面半円形状の突条により、ワッシャと軸受とが線接触する。
上記モータについて、前記突条の頂部を平面状とすることが好ましい。
About the said motor, it is preferable to make the longitudinal cross-sectional shape of the said protrusion into a semicircle shape.
According to this configuration, the washer and the bearing are in line contact with each other by the semi-circular ridge.
About the said motor, it is preferable to make the top part of the said protrusion into planar shape.
この構成によれば、ワッシャと軸受をほぼ線接触させながら、ワッシャに作用する荷重を突条で安定して受けることが可能となる。
上記モータについて、前記軸受には、前記ワッシャとの対向面に突条が設けられていることが好ましい。
According to this configuration, the load acting on the washer can be stably received by the ridge while the washer and the bearing are in substantially line contact.
Regarding the motor, it is preferable that the bearing is provided with a protrusion on the surface facing the washer .
この構成によれば、軸受の突条とワッシャとの間に異物が挟まれ難い。 According to this configuration, it is difficult for foreign matter to be sandwiched between the bearing ridge and the washer .
本発明によれば、モータの部品点数を増大させることなく、ワッシャと軸受との間での異物の挟み込みによる異音の発生を防止することができる。 According to the present invention, it is possible to prevent the generation of noise due to the foreign object being caught between the washer and the bearing without increasing the number of parts of the motor.
（第一の実施形態）
以下、モータの第一の実施形態を図面に従って説明する。図１及び図２に示すモータは、導電性を備えた金属で有底円筒状に形成されたヨーク（ケース）１の内周面は、複数のマグネット２が相対向するように固定されている。
(First embodiment)
Hereinafter, a first embodiment of a motor will be described with reference to the drawings. In the motor shown in FIGS. 1 and 2, the inner peripheral surface of a yoke (case) 1 formed of a conductive metal in a bottomed cylindrical shape is fixed so that a plurality of magnets 2 face each other. .
前記ヨーク１内には、前記マグネット２の内側でアーマチャ（回転子）３が回転可能に支持されている。前記アーマチャ３の回転軸４の一端は、前記ヨーク１の内底部（図１において上端部）に取着された軸受５に回転可能に支持されている。 An armature (rotor) 3 is rotatably supported in the yoke 1 inside the magnet 2. One end of the rotary shaft 4 of the armature 3 is rotatably supported by a bearing 5 attached to the inner bottom portion (upper end portion in FIG. 1) of the yoke 1.
また、前記ヨーク１の開口部１ａにはブラシホルダ６が同開口部１ａを閉塞するように取着され、そのブラシホルダ６に取着された軸受７に前記回転軸４の他端側が回転可能に支持されている。 Further, a brush holder 6 is attached to the opening 1a of the yoke 1 so as to close the opening 1a, and the other end side of the rotary shaft 4 is rotatable on a bearing 7 attached to the brush holder 6. It is supported by.
前記ブラシホルダ６には、一対のブラシ８が取着され、各ブラシ８は前記アーマチャ３に設けられたコンミテータ９のセグメント１０と摺接して、該セグメント１０からアーマチャ３の巻線に電流を供給するようになっている。 A pair of brushes 8 is attached to the brush holder 6, and each brush 8 is in sliding contact with the segment 10 of the commutator 9 provided in the armature 3, and supplies current from the segment 10 to the winding of the armature 3. It is supposed to be.
また、ブラシホルダ６には図示しない外部コネクタと接続可能としたコネクタ部１５が設けられ、そのコネクタ部１５に接続される外部コネクタからブラシ８に電流が供給されると、前記アーマチャ３に電流が供給されて同アーマチャ３が回転される。そして、アーマチャ３の回転が回転軸４を介して出力される。 The brush holder 6 is provided with a connector portion 15 that can be connected to an external connector (not shown). When current is supplied from the external connector connected to the connector portion 15 to the brush 8, current is supplied to the armature 3. The armature 3 is rotated by being supplied. Then, the rotation of the armature 3 is output via the rotation shaft 4.
図２及び図５に示すように、前記軸受５はヨーク１の内底部にカップワッシャ１１で保持されるとともに、その軸受５に前記回転軸４の一端部が回転可能に支持されている。
前記アーマチャ３の巻線と前記回転軸４との間には、巻線と回転軸４の絶縁を確保するために、絶縁材で形成されたインシュレータが介在されている。そして、インシュレータの軸受５側の端部には前記軸受５とアーマチャ３との間で回転軸４を覆う筒状のボス部１２が軸方向に延設され、そのボス部１２の端部と前記軸受５との間にワッシャ１３が介在されている。
As shown in FIGS. 2 and 5, the bearing 5 is held at the inner bottom of the yoke 1 by a cup washer 11, and one end of the rotary shaft 4 is rotatably supported by the bearing 5.
An insulator made of an insulating material is interposed between the winding of the armature 3 and the rotating shaft 4 in order to ensure insulation between the winding and the rotating shaft 4. And the cylindrical boss part 12 which covers the rotating shaft 4 between the said bearing 5 and the armature 3 is extended in the axial direction at the edge part by the side of the bearing 5 of an insulator, and the edge part of the boss part 12 and the said A washer 13 is interposed between the bearing 5 and the bearing 5.
図３及び図４に示すように、前記ワッシャ１３は絶縁性を備えた合成樹脂で環状かつ平板状に形成され、その表裏両面には中心から等距離で環状の突条１４ａ，１４ｂが形成されている。突条１４ａ，１４ｂは、その縦断面形状がほぼ半円となるように形成されている。 As shown in FIGS. 3 and 4, the washer 13 is formed of an insulating synthetic resin in an annular and flat plate shape, and annular protrusions 14a and 14b are formed at equal distances from the center on both front and back surfaces. ing. The protrusions 14a and 14b are formed so that the longitudinal cross-sectional shape thereof is substantially a semicircle.
図２及び図４に示すように、軸受５の軸方向の端面は、その断面形状が軸受５の軸心方向両側に向かって凸となる曲面に形成されている。従って、ワッシャ１３は軸受５の軸方向の端面に対する対向面に形成された突条１４ａでワッシャ１３の周方向全周に亘ってほぼ線接触するようになっている。 As shown in FIGS. 2 and 4, the axial end surface of the bearing 5 is formed in a curved surface whose cross-sectional shape is convex toward both sides in the axial direction of the bearing 5. Accordingly, the washer 13 is substantially in line contact with the entire circumference of the washer 13 by a protrusion 14 a formed on the surface facing the axial end surface of the bearing 5.
図５に示すように、前記インシュレータのボス部１２の端縁は、断面半円状に形成されている。そして、ボス部１２の端縁は、ワッシャ１３に対し突条１４ｂの径方向内側に当接している。 As shown in FIG. 5, the end edge of the boss portion 12 of the insulator is formed in a semicircular cross section. And the edge of the boss | hub part 12 is contact | abutting with respect to the washer 13 at the radial inside of the protrusion 14b.
次に、上記のように構成されたモータの作用を説明する。
ブラシ８を介してアーマチャ３に電流が供給されると、回転軸４を中心としてアーマチャ３が回転されると、インシュレータのボス部１２が回転軸４と一体に回転される。すると、回転軸４及びボス部１２の回転にともなってワッシャ１３が回転しようとするため、ワッシャ１３は突条１４ａで軸受５にほぼ線接触する状態で軸受５に対し回転する。
Next, the operation of the motor configured as described above will be described.
When a current is supplied to the armature 3 via the brush 8, the boss portion 12 of the insulator is rotated integrally with the rotating shaft 4 when the armature 3 is rotated around the rotating shaft 4. Then, since the washer 13 tries to rotate as the rotating shaft 4 and the boss portion 12 rotate, the washer 13 rotates with respect to the bearing 5 in a state of being substantially in line contact with the bearing 5 by the protrusion 14a.
この状態では、ワッシャ１３と軸受５との間には、突条１４ａによる線接触部分を除いて、突条１４ａの高さ分の間隙が確保されている。従って、ワッシャ１３と軸受５との間に異物が侵入しても、異物がこの隙間に保持されるため、軸受５に対しワッシャ１３が傾くことはない。 In this state, a gap corresponding to the height of the protrusion 14a is secured between the washer 13 and the bearing 5 except for the line contact portion by the protrusion 14a. Therefore, even if foreign matter enters between the washer 13 and the bearing 5, the foreign matter is held in this gap, so that the washer 13 does not tilt with respect to the bearing 5.
上記のように構成されたモータでは、次に示す効果を得ることができる。
（１）軸受５とワッシャ１３との間に異物が侵入しても、軸受５に対してワッシャ１３が傾き難い。従って、軸受５に対しワッシャ１３が回転しても、異音の発生を防止することができる。
（２）ワッシャ１３の周方向全周に亘って突条１４ａ，１４ｂが形成されて、ワッシャ１３が軸受５の端面に線接触しながら回転する。従って、軸受５に対しワッシャ１３を円滑に回転させることができるので、ワッシャ１３での振動及び異音の発生を防止することができる。
（３）ワッシャ１３の全周に亘って突条１４ａ，１４ｂが形成されているので、軸受５に対しワッシャ１３が傾いた場合にも、軸受５の端面に対し突条１４ａの頂部を連続的に接触させて衝突を防止することができる。従って、異音（衝突音）の発生を防止することができる。
（４）軸受５のワッシャ１３側の端面を、その断面形状が軸受５の軸心方向に沿って凸となる曲面としたので、軸受５に対しワッシャ１３が傾いた場合にも、軸受５の端面に対し突条１４ａの頂部を連続的に接触させて衝突を防止することができる。従って、異音（衝突音）の発生を防止することができる。
（５）ワッシャ１３の表裏両面に突条１４ａ，１４ｂを設けたので、組立て時に軸受５に対するワッシャ１３の表裏方向の組付け方向が限定されない。従って、組立てを容易に行うことができる。
（６）ワッシャ１３の厚さを突条１４ａ，１４ｂの高さで微調整することができる。従って、平板状のワッシャで厚さを微調整する場合に比して、突条１４ａ，１４ｂの高さのみを調整すればよいので、厚さを微調整したワッシャを容易に製造することができる。
（７）部品点数及び組立工数を増大させることなく、異音の発生を防止することができる。
（第二の実施形態）
図６及び図７は第二の実施形態を示す。この実施形態は、ワッシャ１６の表裏両面に同心円状に２条の突条１７ａ〜１７ｄがそれぞれ形成されている。各突条１７ａ〜１７ｄの縦断面形状は、前記第一の実施形態と同様に、ほぼ半円形状である。ワッシャ１６のその他の構成は、第一の実施形態のワッシャ１３と同様である。
With the motor configured as described above, the following effects can be obtained.
(1) Even if foreign matter enters between the bearing 5 and the washer 13, the washer 13 is difficult to tilt with respect to the bearing 5. Therefore, even if the washer 13 rotates with respect to the bearing 5, it is possible to prevent the generation of abnormal noise.
(2) The protrusions 14 a and 14 b are formed over the entire circumference of the washer 13, and the washer 13 rotates while making line contact with the end surface of the bearing 5. Therefore, since the washer 13 can be smoothly rotated with respect to the bearing 5, the generation of vibration and abnormal noise in the washer 13 can be prevented.
(3) Since the protrusions 14 a and 14 b are formed over the entire circumference of the washer 13, even when the washer 13 is inclined with respect to the bearing 5, the top of the protrusion 14 a is continuously provided with respect to the end surface of the bearing 5. It is possible to prevent a collision by touching. Accordingly, it is possible to prevent the generation of abnormal noise (collision noise).
(4) Since the end surface of the bearing 5 on the washer 13 side is a curved surface whose cross-sectional shape is convex along the axial direction of the bearing 5, even when the washer 13 is inclined with respect to the bearing 5, The top of the protrusion 14a can be continuously brought into contact with the end face to prevent a collision. Accordingly, it is possible to prevent the generation of abnormal noise (collision noise).
(5) Since the protrusions 14a and 14b are provided on both the front and back surfaces of the washer 13, the assembly direction of the front and back directions of the washer 13 with respect to the bearing 5 is not limited during assembly. Therefore, assembly can be performed easily.
(6) The thickness of the washer 13 can be finely adjusted by the height of the protrusions 14a and 14b. Therefore, as compared with the case where the thickness is finely adjusted with a flat plate washer, only the height of the protrusions 14a and 14b has to be adjusted, so that a washer having a finely adjusted thickness can be easily manufactured. .
(7) The occurrence of abnormal noise can be prevented without increasing the number of parts and the number of assembly steps.
(Second embodiment)
6 and 7 show a second embodiment. In this embodiment, two ridges 17 a to 17 d are formed concentrically on both the front and back surfaces of the washer 16. The longitudinal cross-sectional shape of each protrusion 17a-17d is a substantially semicircle shape similarly to said 1st embodiment. Other configurations of the washer 16 are the same as those of the washer 13 of the first embodiment.
このようなワッシャ１６を第一の実施形態のワッシャ１３に代えて使用すると、軸受５に対し例えば突条１７ａ，１７ｂが線接触する状態となる。従って、第一の実施形態と同様な効果を得ることができる。また、ワッシャ１６に作用する回転軸４の軸方向の荷重が増大する場合にも、その荷重を突条１７ａ，１７ｂで分散して受けることができるので、軸受５に対しワッシャ１６を円滑に回転させることができる。
（第三の実施形態）
図８は第三の実施形態を示す。この実施形態は、軸受１８の軸方向両側端面に周方向に全周に亘って突条１９ａ，１９ｂを設けたものである。軸受１８のその他の構成は、第一の実施形態の軸受５と同様である。
When such a washer 16 is used in place of the washer 13 of the first embodiment, for example, the protrusions 17 a and 17 b are in line contact with the bearing 5. Therefore, the same effect as the first embodiment can be obtained. Further, even when the axial load of the rotating shaft 4 acting on the washer 16 increases, the load can be distributed and received by the ridges 17 a and 17 b, so that the washer 16 rotates smoothly with respect to the bearing 5. Can be made.
(Third embodiment)
FIG. 8 shows a third embodiment. In this embodiment, protrusions 19a and 19b are provided on both end surfaces in the axial direction of the bearing 18 over the entire circumference in the circumferential direction. Other configurations of the bearing 18 are the same as those of the bearing 5 of the first embodiment.
このように構成された軸受１８を第一の実施形態の軸受５に代えて使用すると、たとえは突条１９ａの頂部がワッシャ１３に線接触する。従って、第一の実施形態で得られた（１）〜（４）と同様な効果を得ることができる。なお、ワッシャ１３は突条１４ａ，１４ｂを具備しない平板状のワッシャとしてもよい。
（第四の実施形態）
図９及び図１０は、第四の実施形態を示す。図９に示すワッシャ２０は、その表裏両面に周方向全周に亘って形成される突条２１の断面形状において、その頂部が平面状に形成されている。また、図１０に示すワッシャ２２は、その表裏両面に周方向全周に亘って形成される突条２３の断面形状が台形状に形成されて、その頂部が平面状となっている。ワッシャ２０，２２のその他の構成は、第一の実施形態のワッシャ１３と同様である。
When the bearing 18 configured in this way is used in place of the bearing 5 of the first embodiment, for example, the top of the ridge 19a makes line contact with the washer 13. Therefore, the same effects as (1) to (4) obtained in the first embodiment can be obtained. In addition, the washer 13 is good also as a flat washer which does not comprise the protrusion 14a, 14b.
(Fourth embodiment)
9 and 10 show a fourth embodiment. The washer 20 shown in FIG. 9 has a flat top portion in the cross-sectional shape of the ridge 21 formed on the front and back surfaces over the entire circumference in the circumferential direction. In addition, the washer 22 shown in FIG. 10 has a trapezoidal cross-sectional shape of the ridges 23 formed on the front and back surfaces of the washer 22 over the entire circumference in the circumferential direction, and the top is flat. Other configurations of the washers 20 and 22 are the same as those of the washer 13 of the first embodiment.
このようなワッシャ２０，２２を第一の実施形態のワッシャ１３に代えて使用すると、ワッシャ２０，２２は平板状のワッシャを軸受に当接させる場合に比して、軸受５に対し突条２１，２３の頂部で線接触に近い状態で接触する状態となる。従って、第一の実施形態と同様な効果を得ることができる。また、ワッシャ２０，２２に作用する回転軸４の軸方向の荷重が増大する場合にも、その荷重を突条２１，２３の頂部で分散して受けることができるので、軸受５に対しワッシャ２０，２２を円滑に回転させることができる。
（第五の実施形態）
図１１は第五の実施形態を示す。この実施形態は、インシュレータのボス部１２の端縁２４を断面半円形状とし、そのボス部１２の端縁２４をワッシャを介することなく軸受５に当接させたものである。その他の構成は、第一の実施形態と同様である。
When such washers 20 and 22 are used in place of the washer 13 of the first embodiment, the washers 20 and 22 have protrusions 21 with respect to the bearing 5 as compared with a case where a flat washer is brought into contact with the bearing. , 23 is in a state of contact in a state close to line contact. Therefore, the same effect as the first embodiment can be obtained. Further, even when the axial load of the rotating shaft 4 acting on the washers 20 and 22 increases, the load can be distributed and received at the tops of the ridges 21 and 23. , 22 can be smoothly rotated.
(Fifth embodiment)
FIG. 11 shows a fifth embodiment. In this embodiment, the end edge 24 of the boss portion 12 of the insulator has a semicircular cross section, and the end edge 24 of the boss portion 12 is brought into contact with the bearing 5 without a washer. Other configurations are the same as those of the first embodiment.
このような構成では、ボス部１２の端縁２４が軸受５に対し線接触するので、ボス部１２の端縁と軸受５との間に異物を挟み込み難い。従って、ボス部１２の端縁と軸受５との間に異物を挟みこむことによる異音の発生を防止することができる。 In such a configuration, since the end edge 24 of the boss portion 12 is in line contact with the bearing 5, it is difficult to insert foreign matter between the end edge of the boss portion 12 and the bearing 5. Therefore, it is possible to prevent the generation of noise due to the foreign matter sandwiched between the end edge of the boss portion 12 and the bearing 5.
上記実施形態は、以下の態様で実施してもよい。
・第一の実施形態において、軸受５のワッシャ１３側の端面を平面としてもよい。
You may implement the said embodiment in the following aspects.
-In 1st embodiment, it is good also considering the end surface by the side of the washer 13 of the bearing 5 as a plane.
１…ケース（ヨーク）、３…回転子（アーマチャ）、４…回転軸、５…軸受、１２…スペース部材（ボス部）、１３，１６，２０…スペース部材（ワッシャ）、１４ａ，１４ｂ，１７ａ〜１７ｄ，１９ａ，１９ｂ，２１，２３，２４…保持部（突条、端縁）。 DESCRIPTION OF SYMBOLS 1 ... Case (yoke), 3 ... Rotor (armature), 4 ... Rotary shaft, 5 ... Bearing, 12 ... Space member (boss part), 13, 16, 20 ... Space member (washer), 14a, 14b, 17a ˜17d, 19a, 19b, 21, 23, 24... Holding portion (projection, edge).
Claims (7)
前記回転子と前記回転軸との間にはインシュレータが介在されており、
前記インシュレータの前記軸受側の端部にはボス部が設けられ、該ボス部は、前記回転子が回転されるときに前記回転軸と一体回転されるものであり、
前記ボス部と前記軸受との間には前記スペース部材としてワッシャが介在されており、
前記ワッシャには、該ワッシャと前記軸受とを前記回転軸の周囲で周方向全周に亘って線接触させる突条が設けられており、
前記ワッシャは、前記回転子が回転されるときに前記回転軸と一体回転される前記ボス部の回転にともなって回転することを特徴とするモータ。 Provided with a casing and rotor and the rotational shaft rotatably supports the rotation shaft of the rotor bearing fixed to said casing, said rotating said rotor between said bearing rotor In a motor having a space member to be held in the axial direction of the shaft,
An insulator is interposed between the rotor and the rotation shaft,
A boss portion is provided at an end of the insulator on the bearing side, and the boss portion is integrally rotated with the rotating shaft when the rotor is rotated.
Between the boss part and the bearing, a washer is interposed as the space member,
Wherein the washer has ridges to line contact across the said with the washer bearing the entire circumference around the rotary shaft is provided,
The said washer rotates with rotation of the said boss | hub part rotated integrally with the said rotating shaft when the said rotor rotates .
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| JPS60256623A (en) * | 1984-05-25 | 1985-12-18 | ポール・デイー・バーゲツト | Spindle mechanism |
| JP2749221B2 (en) * | 1991-10-31 | 1998-05-13 | 株式会社日立製作所 | Small electric motor |
| JPH0574164U (en) * | 1992-03-05 | 1993-10-08 | 松下電器産業株式会社 | Small motor thrust pipe |
| JP2588328Y2 (en) * | 1992-11-06 | 1999-01-06 | 松下電器産業株式会社 | Thrust pipe |
| JP2526371B2 (en) * | 1994-04-07 | 1996-08-21 | 北栄工業株式会社 | Synthetic resin thrust bearing |
| JPH09264326A (en) * | 1996-03-27 | 1997-10-07 | Pooraito Kk | Oil-impregnated sintered bearing, and its manufacture |
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| JP3946971B2 (en) * | 2000-07-31 | 2007-07-18 | アスモ株式会社 | Geared motor |
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