JP5484221B2

JP5484221B2 - Sliding bearing device with rotation detection function

Info

Publication number: JP5484221B2
Application number: JP2010149029A
Authority: JP
Inventors: 郁大本
Original assignee: NTN Corp
Current assignee: NTN Corp
Priority date: 2010-06-30
Filing date: 2010-06-30
Publication date: 2014-05-07
Anticipated expiration: 2030-06-30
Also published as: JP2012013494A

Description

この発明は、軽荷重等を受ける滑り軸受、例えば複写機やプリンタ等の事務機器等に用いられる回転検出機能付き滑り軸受装置に関する。 The present invention relates to a sliding bearing with a rotation detection function used in a sliding bearing that receives a light load or the like, for example, office equipment such as a copying machine or a printer.

回転センサ付軸受として、転がり軸受の内輪にエンコーダを設け、静止部である外輪にセンサハウジングを設け、センサハウジングで支持したセンサによりエンコーダの回転を検出するようにしたものがある（例えば特許文献１）。また、滑り軸受において回転検出機能を持たせたものもある（例えば特許文献２）。 As a bearing with a rotation sensor, an encoder is provided on an inner ring of a rolling bearing, a sensor housing is provided on an outer ring that is a stationary part, and rotation of the encoder is detected by a sensor supported by the sensor housing (for example, Patent Document 1). ). Some sliding bearings have a rotation detection function (for example, Patent Document 2).

特開２００７−２２４９６８号公報JP 2007-224968 A 特開２００６−２６６９６２号公報Japanese Patent Laid-Open No. 2006-266962

転がり軸受に回転センサを取付けた場合、エンコーダ部を軸受の内輪に圧入して取付けるため、エンコーダの再利用は不可能となり、軸受またはセンサの独立した交換ができない。
上記特許文献２の滑り軸受は、センサハウジングに対して滑り軸受部の設置側に、センサが実装されたセンサ実装基板が設けられていて、滑り軸受部に対してセンサの取り外しができない構造になっている。そのため、センサに故障等の問題がなく、滑り軸受部を交換したい場合に、センサの再利用が不可能となっている。また、センサへの電気配線は配線用コネクタを経由せずに直接に接続されているため、組立に手間がかかる。 When a rotation sensor is attached to a rolling bearing, the encoder portion is press-fitted and attached to the inner ring of the bearing, so the encoder cannot be reused and the bearing or sensor cannot be replaced independently.
The sliding bearing of Patent Document 2 has a structure in which a sensor mounting board on which a sensor is mounted is provided on the side where the sliding bearing portion is installed with respect to the sensor housing, and the sensor cannot be detached from the sliding bearing portion. ing. Therefore, there is no problem such as failure in the sensor, and the sensor cannot be reused when it is desired to replace the sliding bearing portion. Further, since the electrical wiring to the sensor is directly connected without going through the wiring connector, it takes time to assemble.

この発明の目的は、容易に分解できて、滑り軸受部かセンサ実装基板のいずれか等の不良発生部品のみを交換し、他の部分を再利用可能とした回転検出機能付き滑り軸受装置を提供することである。
この発明の他の目的は、電気配線部から脱着することができて、取扱を容易とすることである。
この発明のさらに他の目的は、簡単な部品交換により、回転検出の分解能の変更や、単純回転検出、回転方向検出機能、原点検出機能等の回転検出の種類変更等を可能とすることである。 An object of the present invention is to provide a sliding bearing device with a rotation detection function that can be easily disassembled, replaces only a defective part such as a sliding bearing part or a sensor mounting board, and allows other parts to be reused. It is to be.
Another object of the present invention is to make it easy to handle because it can be detached from the electrical wiring section.
Still another object of the present invention is to make it possible to change the resolution of rotation detection, change the type of rotation detection such as simple rotation detection, rotation direction detection function, origin detection function, etc. by simple component replacement. .

この発明の回転検出機能付き滑り軸受装置は、内周面が軸に対して接する滑り軸受部、および前記軸の外周を囲む環状のセンサハウジング部を、軸方向に並べて一体に設けたセンサハウジング付き軸受本体と、前記軸に装着されて前記センサハウジング部内に位置するエンコーダ部と、このエンコーダ部を検出するセンサが実装され前記センサハウジング部内に、前記滑り軸受部と反対側の端部から挿脱可能に装着されたセンサ実装基板とを備える。 The sliding bearing device with a rotation detecting function of the present invention has a sensor housing in which a sliding bearing portion whose inner peripheral surface is in contact with the shaft and an annular sensor housing portion surrounding the outer periphery of the shaft are integrally arranged in the axial direction. A bearing body, an encoder portion mounted on the shaft and positioned in the sensor housing portion, and a sensor for detecting the encoder portion are mounted, and the sensor housing portion is inserted and removed from the end opposite to the sliding bearing portion. And a sensor mounting board that can be mounted.

この構成によると、滑り軸受部と一体化されたセンサハウジング部に対して、センサ実装基板が滑り軸受部と反対側の端部から挿脱可能に装着されている。そのため、滑り軸受部とセンサ実装基板との相互の分解が容易であり、これら滑り軸受部とセンサ実装基板との、いずれか不良となった部品のみを交換し、他の部品を再利用することができる。 According to this configuration, the sensor mounting board is detachably attached to the sensor housing part integrated with the sliding bearing part from the end opposite to the sliding bearing part. Therefore, it is easy to disassemble the sliding bearing part and the sensor mounting board from each other. Replace only the defective parts of the sliding bearing part and the sensor mounting board and reuse other parts. Can do.

この発明において、前記センサハウジング部は、円周方向の一部に径方向の内外に貫通した基板配置用窓を有し、かつこの基板配置用窓内に臨む凸部または凹部からなる基板受け部を有し、前記センサ実装基板を、前記基板受け部で受けて前記基板配置用窓内に設置し、前記センサ実装基板に接続する配線を前記基板配置用窓から外径側に取り出しても良い。
この構成の場合は、センサ実装基板を基板受け部で受けて基板配置用窓内に設置するため、センサハウジング付き軸受本体に対するセンサ実装基板の着脱がより一層容易となる。また、センサ実装基板に接続する配線を基板配置用窓から外径側に取り出すため、配線が邪魔となることなく、センサ実装基板の着脱が行える。 In the present invention, the sensor housing portion has a substrate placement window penetrating inward and outward in the radial direction in a part of the circumferential direction, and a substrate receiving portion comprising a convex portion or a concave portion facing the substrate placement window. The sensor mounting board may be received by the board receiving portion and installed in the board placement window, and a wiring connected to the sensor mounting board may be taken out from the board placement window to the outer diameter side. .
In this configuration, since the sensor mounting board is received by the board receiving portion and installed in the board placement window, the sensor mounting board can be more easily attached to and detached from the bearing body with the sensor housing. Further, since the wiring connected to the sensor mounting board is taken out from the board placement window to the outer diameter side, the sensor mounting board can be attached and detached without the wiring being in the way.

上記のように、センサ実装基板を基板配置用窓に基板受け部で受ける場合に、前記センサ実装基板におけるセンサハウジング部の外側を向く面に、前記配線の接続用のコネクタを実装しても良い。この構成の場合、センサ実装基板を電気配線から脱着することができ、センサハウジング付き軸受本体に対するセンサ実装基板の脱着等の取扱や、事務機器等内での回転検出機能付き滑り軸受装置の保守や組立等の取扱がより一層容易となる。 As described above, when the sensor mounting board is received by the board receiving window in the board placement window, the connector for connecting the wiring may be mounted on the surface of the sensor mounting board facing the outside of the sensor housing part. . In this configuration, the sensor mounting board can be detached from the electrical wiring, the handling of the sensor mounting board with respect to the bearing body with the sensor housing, etc., the maintenance of the sliding bearing device with a rotation detection function in office equipment, etc. Handling such as assembly becomes even easier.

また、上記のように、センサ実装基板を基板配置用窓に基板受け部で受ける場合に、前記センサハウジング部の前記滑り軸受部と反対側の端部の開口を前記軸の外周で封鎖するする蓋部材を、前記センサハウジング部に着脱可能に取付け、前記基板受け部で受けられた前記センサ実装基板を、前記蓋部材で抜け止めすることで前記センサハウジング部に対して固定しても良い。
このように蓋部材でセンサ実装基板を固定するようにした場合、センサ実装基板の着脱がより一層容易となる。 In addition, as described above, when the sensor mounting board is received by the board receiving window in the board placement window, the opening of the end of the sensor housing part opposite to the sliding bearing part is sealed at the outer periphery of the shaft. A lid member may be detachably attached to the sensor housing part, and the sensor mounting board received by the board receiving part may be fixed to the sensor housing part by retaining the lid member with the lid member.
When the sensor mounting board is fixed with the lid member in this way, the sensor mounting board can be attached and detached more easily.

この発明において、前記軸は、外周面の円周方向の一部に、平坦面で切除した形状の平坦面部を有し、前記エンコーダ部は、環状に形成されて前記軸の外周に嵌合し、かつ内周面の円周方向の一部に突出して設けられた先端が平坦面の平坦面状係合突部で前記平坦面部に係合させても良い。
このような平坦面部による嵌め合い、いわゆるＤカット部による嵌め合いとした場合、軸に対するエンコーダ部の取付位相が定まり、また取付位相を目視で確認することでできる。 In this invention, the shaft has a flat surface portion having a shape cut by a flat surface in a part of the outer peripheral surface in the circumferential direction, and the encoder portion is formed in an annular shape and is fitted to the outer periphery of the shaft. And the front-end | tip which protruded and provided in a part of circumferential direction of the internal peripheral surface may be engaged with the said flat surface part by the flat surface-like engagement protrusion of a flat surface.
When fitting by such a flat surface portion, that is, fitting by a so-called D-cut portion, the mounting phase of the encoder portion with respect to the shaft is determined, and the mounting phase can be confirmed visually.

この発明のように、前記エンコーダは、円周方向に磁極が並ぶ環状の回転検出用着磁トラックを有するものであっても良い。この構成場合、回転速度や回転位相の検出のみの単純回転検出機能を持たせることができる。
また、前記エンコーダは、円周方向に磁極が並ぶ環状の回転検出用着磁トラックを複数列有し、両回転検出用着磁トラックは、互いに位相またはピッチが異なっていて、前記センサとして、前記各回転検出用着磁トラックをそれぞれ検出する複数のセンサを設けても良い。この構成の場合、単純回転検出機能に加え、両回転検出用着磁トラックの検出信号の位相ずれから、回転方向の検出機能を持たせることができる。 As in the present invention, the encoder may have an annular rotation detection magnetization track in which magnetic poles are arranged in the circumferential direction. In this configuration, it is possible to provide a simple rotation detection function only for detecting the rotation speed and the rotation phase.
Further, the encoder has a plurality of circular rotation detection magnetized tracks in which magnetic poles are arranged in a circumferential direction, and both rotation detection magnetized tracks have different phases or pitches, and the sensor A plurality of sensors for detecting each rotation detection magnetized track may be provided. In the case of this configuration, in addition to the simple rotation detection function, the rotation direction detection function can be provided from the phase shift of the detection signal of the both-rotation detection magnetized track.

また、前記エンコーダは、円周方向の一部に原点検出用着磁部を有し、前記センサとして、前記原点検出用着磁部を検出するセンサを設けても良い。この構成の場合、軸の１回転で１回となる原点の検出機能を持たせることができる。 The encoder may have an origin detection magnetized part in a part in a circumferential direction, and a sensor for detecting the origin detection magnetized part may be provided as the sensor. In the case of this configuration, it is possible to provide a function of detecting the origin that is performed once per rotation of the shaft.

原点検出機能を持たせる場合に、前記軸は、外周面の円周方向の一部に、平坦面で切除した形状の平坦面部を有し、前記エンコーダ部は、環状に形成されて前記軸の外周に嵌合し、かつ内周面の円周方向の一部に突出して設けられた先端が平坦面の平坦面状係合部を前記平坦面部に係合させ、前記原点検出用着磁部を、前記エンコーダ部の前記平坦面状係合突部から軸方向に突出させた突片に設けても良い。この構成の場合、軸の平坦面状係合部と対応して原点検出用着磁部が設けられるため、位相合わせや軸の原点検出の取扱が容易となる。 In the case of providing an origin detection function, the shaft has a flat surface portion having a shape cut out by a flat surface in a part of the circumferential direction of the outer peripheral surface, and the encoder portion is formed in an annular shape so that the shaft The origin detecting magnetized portion engages with the flat surface engaging portion having a flat surface with a tip that is fitted to the outer periphery and protrudes to a part of the inner peripheral surface in the circumferential direction. May be provided on a protruding piece that protrudes in the axial direction from the flat surface-shaped engaging protruding portion of the encoder portion. In the case of this configuration, since the origin detecting magnetized portion is provided corresponding to the flat planar engaging portion of the shaft, handling of phase alignment and shaft origin detection becomes easy.

この発明の回転検出機能付き滑り軸受装置は、事務機器の軸の支持に用いられるものであっても良い。前記事務機は、例えば、複写機やプリンタ等である。これらの事務機ではその軸受は比較的に軽荷重等を受けることになるが、コスト低下の要求が強く、また構成部品の再利用が強く望まれる。そのため、この発明における、滑り軸受部かセンサ実装基板のいずれか等の不良発生部品のみを交換可能とした効果が、より一層効果的に発揮される。 The sliding bearing device with a rotation detecting function of the present invention may be used for supporting a shaft of office equipment. The office machine is, for example, a copying machine or a printer. In these office machines, the bearing receives a relatively light load and the like, but there is a strong demand for cost reduction, and it is strongly desired to reuse the components. Therefore, the effect that only defective parts such as the sliding bearing portion or the sensor mounting board can be replaced in the present invention is more effectively exhibited.

この発明の回転検出機能付き滑り軸受装置は、内周面が軸に対して接する滑り軸受部、および前記軸の外周を囲む環状のセンサハウジング部を、軸方向に並べて一体に設けたセンサハウジング付き軸受本体と、前記軸に装着されて前記センサハウジング部内に位置するエンコーダ部と、このエンコーダ部を検出するセンサが実装され前記センサハウジング部内に、前記滑り軸受部と反対側の端部から挿脱可能に装着されたセンサ実装基板とを備えるため、容易に分解できて、滑り軸受部かセンサ実装基板のいずれか等の不良発生部品のみを交換し、他の部分を再利用可能とすることができる。 The sliding bearing device with a rotation detecting function of the present invention has a sensor housing in which a sliding bearing portion whose inner peripheral surface is in contact with the shaft and an annular sensor housing portion surrounding the outer periphery of the shaft are integrally arranged in the axial direction. A bearing body, an encoder portion mounted on the shaft and positioned in the sensor housing portion, and a sensor for detecting the encoder portion are mounted, and the sensor housing portion is inserted and removed from the end opposite to the sliding bearing portion. It is possible to disassemble easily and replace only defective parts such as sliding bearings or sensor mounting boards, and make other parts reusable. it can.

この発明の一実施形態に係る回転検出機能付き滑り軸受装置の破断側面図である。It is a fracture side view of a slide bearing device with a rotation detection function concerning one embodiment of this invention. 同回転検出機能付き滑り軸受装置の背面図である。It is a rear view of the slide bearing device with the same rotation detection function. そのセンサハウジング付き軸受本体の破断側面図および背面図である。It is the fracture | rupture side view and rear view of the bearing main body with the sensor housing. そのエンコーダ部の破断側面および背面図である。It is the fracture | rupture side surface and rear view of the encoder part. 同エンコーダ部の着磁範囲の説明図である。It is explanatory drawing of the magnetization range of the encoder part. そのセンサ実装基板の側面図である。It is a side view of the sensor mounting substrate. その蓋部材の断面図および正面図である。It is sectional drawing and the front view of the cover member.

この発明の一実施形態を図１ないし図７と共に説明する。この回転検出機能付き滑り軸受装置は、センサハウジング付き軸受本体１、センサ実装基板２、および蓋部材３を組み立てた部品と、エンコーダ部４とでなる。 An embodiment of the present invention will be described with reference to FIGS. This sliding bearing device with a rotation detection function includes a bearing body 1 with a sensor housing, a sensor mounting board 2 and a part in which a lid member 3 is assembled, and an encoder unit 4.

センサハウジング付き軸受本体１は、円筒面状の内周面６ａが軸５に対して接する滑り軸受部６と、軸５の外周を囲む環状のセンサハウジング部７とを軸方向に並べて一体に設けた部品である。センサハウジング付き軸受本体１は、金属であっても、樹脂であっても良い。図示の例では、センサハウジング付き軸受本体１は全体が同材質の一体品とされているが、軸５に対して滑り接触する内周面６ａを構成する部分に、他の部分よりも耐摩耗性に優れた素材を用いても良い。これにより、滑り軸受部６の長寿命化が可能となる。この場合、内周面６ａを構成する部分は、スリーブ等で構成し、他の部分に対して、溶接、圧入、接着、一体成形等で一体に固定されたものとする。なお、図１において破線で示す範囲ａは、センサハウジング付き軸受本体１と軸５の滑り軸受として作用する部分を示す。 The bearing body 1 with a sensor housing is provided integrally with a sliding bearing portion 6 having a cylindrical inner peripheral surface 6a in contact with the shaft 5 and an annular sensor housing portion 7 surrounding the outer periphery of the shaft 5 in the axial direction. Parts. The bearing body 1 with the sensor housing may be a metal or a resin. In the illustrated example, the entire bearing body 1 with the sensor housing is an integral part of the same material, but the portion constituting the inner peripheral surface 6a that is in sliding contact with the shaft 5 is more resistant to wear than the other portions. A material excellent in properties may be used. Thereby, the lifetime of the sliding bearing part 6 can be extended. In this case, the portion constituting the inner peripheral surface 6a is constituted by a sleeve or the like, and is fixed integrally to other portions by welding, press-fitting, adhesion, integral molding or the like. A range a indicated by a broken line in FIG. 1 indicates a portion acting as a sliding bearing between the bearing body 1 with the sensor housing and the shaft 5.

センサハウジング付き軸受本体１の滑り軸受部６となる部分の外周には、円筒面状等の機器嵌合面６ｂと、環状の機器係合突部６ｃとが設けられ、この回転検出機能付き滑り軸受装置を取付ける事務機器などの取付フレーム８に取付穴８ａで嵌合し、かつ取付フレーム８の側面に機器係合突部６ｃの側面で係合して位置決めされる。 On the outer periphery of the portion that becomes the sliding bearing portion 6 of the bearing body 1 with the sensor housing, a device fitting surface 6b having a cylindrical surface shape and an annular device engaging protrusion 6c are provided. The mounting frame 8 is fitted into a mounting frame 8 such as an office machine to which the bearing device is attached, and is engaged with the side surface of the mounting frame 8 on the side surface of the device engaging protrusion 6c.

センサハウジング部７は、滑り軸受部６に対して外径が同径であって、内径が大きい円筒状部とされ、かつ内周面は、滑り軸受部６に対する反対側端の内周が、他の部分の内周面７ａよりも大径の内径拡径部７ｂとなった段付き円筒面とされている。内径拡径部７ｂには、円周溝からなる蓋取付用溝９が形成され、図７に示す板状で蓋部材３が、外周の環状の係合用突部３ａで嵌合する。蓋部材３は中央に軸挿通穴３ｂを有する環状に形成されている。 The sensor housing part 7 is a cylindrical part having the same outer diameter as the sliding bearing part 6 and a large inner diameter, and the inner peripheral surface is the inner circumference of the opposite end with respect to the sliding bearing part 6. A stepped cylindrical surface that is an inner diameter enlarged portion 7b having a larger diameter than the inner peripheral surface 7a of the other part is formed. A lid mounting groove 9 made of a circumferential groove is formed in the inner diameter enlarged portion 7b, and the lid member 3 having a plate shape shown in FIG. 7 is fitted with an annular engaging projection 3a on the outer periphery. The lid member 3 is formed in an annular shape having a shaft insertion hole 3b at the center.

センサハウジング部７の円周方向の一部には、径方向の内外に貫通した基板配置用窓１０が設けられている。図３ように、基板配置用窓１０の内周面には、軸方向の一端に位置する凹部である溝状の基板受け部１１ａおよび円周方向の両側に位置する凹部である溝状の基板受け部１１ｂが、互いに続いて設けられている。図１ように、センサ実装基板２は、これら溝状の基板受け部１１ａ、１１ｂに外周の３辺が嵌合することで、これら基板受け部１１ａ，１１ｂにより、軸方向にのみ挿脱自在に受けられる。この基板受け部１１ａ，１１ｂで軸方向に挿脱自在に受けられたセンサ実装基板２は、センサハウジング部７に蓋部材３を嵌合させることで、蓋部材３により抜け止めされ、センサハウジング部７に対して固定状態となる。なお、基板受け部１１ａ、１１ｂは、基板配置用窓１０内に突出した凸部であってもよい。 A part of the sensor housing part 7 in the circumferential direction is provided with a substrate placement window 10 penetrating inward and outward in the radial direction. As shown in FIG. 3, on the inner peripheral surface of the substrate placement window 10, a groove-like substrate receiving portion 11a that is a recess located at one end in the axial direction and a groove-like substrate that is a recess located on both sides in the circumferential direction. The receiving part 11b is provided following each other. As shown in FIG. 1, the sensor mounting substrate 2 can be inserted / removed only in the axial direction by the substrate receiving portions 11a and 11b by fitting the three outer peripheral sides to these groove-shaped substrate receiving portions 11a and 11b. I can receive it. The sensor mounting substrate 2 received by the substrate receiving portions 11a and 11b so as to be detachable in the axial direction is prevented from being detached by the lid member 3 by fitting the lid member 3 to the sensor housing portion 7, and the sensor housing portion. 7 is fixed. The substrate receiving portions 11a and 11b may be convex portions protruding into the substrate arrangement window 10.

図６に示すように、センサ実装基板２は、矩形状の印刷配線基板２ａにセンサ１２と回路部品（図示せず）を実装したものである。この例では、印刷配線基板２ａは、両面に配線パターン（図示せず）を有し、両面の配線パターンが互いにスルーホール部で導体により接続されたものを用い、センサ１２（１２Ａ，１２Ｂ，１２Ｃ）の取付面と反対側の面に配線用コネクタ１３を実装している。配線用コネクタ１３は、互いに差し込み接続されるソケット側およびプラグ側のコネクタ部品１３ａ，１３ｂを有し、ソケット側のコネクタ部品１３ａが印刷配線基板２ａに実装されている。プラグ側のコネクタ部品１３ｂには配線１４が接続されている。 As shown in FIG. 6, the sensor mounting board 2 is obtained by mounting a sensor 12 and a circuit component (not shown) on a rectangular printed wiring board 2a. In this example, the printed wiring board 2a has wiring patterns (not shown) on both surfaces, and the wiring patterns on both surfaces are connected to each other by conductors at through holes, and the sensor 12 (12A, 12B, 12C) is used. The wiring connector 13 is mounted on the surface opposite to the mounting surface. The wiring connector 13 includes socket-side and plug-side connector parts 13a and 13b that are plugged in and connected to each other, and the socket-side connector part 13a is mounted on the printed wiring board 2a. A wiring 14 is connected to the plug-side connector part 13b.

センサ１２として、センサ実装基板２には、それぞれ磁気センサからなる第１および第２の回転検出用のセンサ１２Ａ，１２Ｂと、原点検出用のセンサ１２Ｃとが設けられる。なお、この明細書では、これら３つのセンサ１２Ａ〜１２Ｃにつき、特に種類の区別の必要のない場合に、単にセンサ１２と称している。回転検出用の第１および第２のセンサ１２Ａ，１２Ｂは、軸方向に並べて配置されている。原点検出用のセンサ１２ｃは、印刷配線基板２ａの一端にＬ字状に折り曲げ形状に形成された折り曲げ片部２ａａに設けられている。各回転検出用のセンサ１２Ａ，１２Ｂには、両極検出型センサ（Ｎ極およびＳ極の両方を検出するセンサ）または単極検出型センサ（Ｎ極またはＳ極のみを検出するセンサ）が用いられる。原点検出用のセンサ１２Ｃには単極検出型センサが用いられる。 As the sensor 12, the sensor mounting substrate 2 is provided with first and second rotation detection sensors 12A and 12B each made of a magnetic sensor and an origin detection sensor 12C. In this specification, these three sensors 12A to 12C are simply referred to as sensors 12 when there is no need to distinguish the types. The first and second sensors 12A and 12B for rotation detection are arranged side by side in the axial direction. The sensor 12c for detecting the origin is provided on a bent piece 2aa formed in an L shape and bent at one end of the printed wiring board 2a. For each rotation detection sensor 12A, 12B, a bipolar detection type sensor (a sensor that detects both N pole and S pole) or a single pole detection type sensor (a sensor that detects only N pole or S pole) is used. . A unipolar detection type sensor is used as the sensor 12C for detecting the origin.

図１において、軸５のエンコーダ４が装着される端部は、外周面の円周方向の一部に、平坦面で切除した形状の平坦面部５ｂが形成され、いわゆるＤカット形状とされている。平坦面部５ｂは、エンコーダ４を嵌合させる部分から軸５の端面まで続いている。 In FIG. 1, the end portion of the shaft 5 to which the encoder 4 is mounted has a so-called D-cut shape in which a flat surface portion 5 b is formed by cutting off a flat surface in a part of the outer peripheral surface in the circumferential direction. . The flat surface portion 5 b continues from the portion where the encoder 4 is fitted to the end surface of the shaft 5.

図４にエンコーダ部４を示す。エンコーダ部４は、一つの環状の部品からなり、より具体的には円筒状に形成されていて、図１のように軸５の外周に嵌合する。エンコーダ部４には、回り止め用として、内周面の円周方向の一部に、先端が平坦面の平坦面状係合突部４ａが突出して設けられ、平坦面状係合突部４ａで軸５の平坦面部５ｂに全体が接触するように係合する。 FIG. 4 shows the encoder unit 4. The encoder unit 4 is composed of one annular part, more specifically, is formed in a cylindrical shape, and is fitted to the outer periphery of the shaft 5 as shown in FIG. The encoder part 4 is provided with a flat surface-like engagement protrusion 4a having a flat tip protruding from a part of the inner peripheral surface in the circumferential direction for preventing rotation, and the flat surface-like engagement protrusion 4a. Thus, the flat surface portion 5b of the shaft 5 is engaged so as to be entirely in contact.

エンコーダ部４は、全体が磁性材料からなり、または樹脂や金属製の母材に磁性材料の層を塗布などで設けたものであり、センサ１２で検出可能な磁力を有している。具体的には、図５に示すように、外周に環状の回転検出用着磁トラック２１，２２が軸方向に並べて設けられている。第１の回転検出用着磁トラック２１は、例えばＮ極とＳ極の磁極を円周方向に交互に等ピッチで設けたものである。第２の回転検出用着磁トラック２２は、第１の回転検出用着磁トラック２１と同様に、Ｎ極とＳ極の磁極を円周方向に交互に設けたものであるが、第１の回転検出用着磁トラック２１とは、互いに位相またはピッチが異なるものとされる。例えば、円周方向の一部の磁極のみを円周方向幅の広い磁極とし、残りの各磁極を等ピッチとしても良い。 The encoder unit 4 is entirely made of a magnetic material, or is provided by applying a magnetic material layer to a resin or metal base material, and has a magnetic force that can be detected by the sensor 12. Specifically, as shown in FIG. 5, annular rotation detection magnetized tracks 21 and 22 are provided on the outer periphery side by side in the axial direction. The first rotation detecting magnetized track 21 is formed by alternately arranging N-pole and S-pole magnetic poles at equal pitches in the circumferential direction, for example. Similar to the first rotation detection magnetized track 21, the second rotation detection magnetized track 22 is configured by alternately providing N-pole and S-pole magnetic poles in the circumferential direction. The rotation detection magnetized track 21 is different in phase or pitch from each other. For example, only a part of the magnetic poles in the circumferential direction may be wide magnetic poles, and the remaining magnetic poles may be of equal pitch.

エンコーダ部４の円筒状部分の一端には、前記平坦面状係合突部４ａから軸方向に延びる突片４ｂが設けられている。突片４ｂは、平坦面状係合突部４ａと同じ横断面形状であって、外周面が円筒面で、内周側の面が平坦面とされ、図１の蓋部材３の軸挿通穴３ｂ内に相対回転許容用の隙間を介して嵌合する。この突片４ｂのエンコーダ外径側の面に、図５のように原点検出用着磁トラック２３が設けられている。原点検出用着磁トラック２３は、請求項で言う原点検出用着磁部であり、ＮまたはＳ極の単極の磁極からなる。このように突片４ｂに原点検出用着磁トラック２３を設けることで、原点検出用着磁トラック２３をエンコーダ部４の円筒状部分に設ける必要がなくなり、エンコーダ部４の小型化が可能になる。なお、原点検出用着磁トラック２３は、Ｎ極とＳ極とを円周方向に交互に３つ並べてものであっても良い。 At one end of the cylindrical portion of the encoder section 4, a projecting piece 4b extending in the axial direction from the flat surface engaging projecting section 4a is provided. The protruding piece 4b has the same cross-sectional shape as the flat surface engaging protruding portion 4a, the outer peripheral surface is a cylindrical surface, and the inner peripheral surface is a flat surface, and the shaft insertion hole of the lid member 3 in FIG. It fits in 3b through the clearance for relative rotation permission. An origin detecting magnetized track 23 is provided on the surface of the projecting piece 4b on the outer diameter side of the encoder as shown in FIG. The origin detecting magnetized track 23 is an origin detecting magnetized portion referred to in the claims, and is composed of N or S single poles. Thus, by providing the origin detecting magnetized track 23 on the projecting piece 4b, it is not necessary to provide the origin detecting magnetized track 23 in the cylindrical portion of the encoder unit 4, and the encoder unit 4 can be downsized. . Note that the origin detection magnetized track 23 may have three N poles and S poles arranged alternately in the circumferential direction.

なお、前記各センサ１２Ａ〜１２Ｃは、エンコーダ部４の２つの回転検出用着磁トラック２１，２２および原点検出用着磁トラック２３とそれぞれ同じ軸方向位置に配置され、これらの着磁トラック２１〜２３に対してラジアル方向に対面する。 The sensors 12A to 12C are arranged at the same axial position as the two rotation detection magnetized tracks 21 and 22 and the origin detection magnetized track 23 of the encoder unit 4, respectively. Faces 23 in the radial direction.

上記構成の回転検出機能付き滑り軸受装置によると、滑り軸受部６と一体化されたセンサハウジング部７に対して、センサ実装基板２が滑り軸受部６と反対側の端部から挿脱可能に装着されている。そのため、滑り軸受部６とセンサ実装基板２との相互の分解が容易であり、これら滑り軸受部２とセンサ実装基板３とのいずれか一方が不良となった場合に、その不良の部品のみを交換し、他の部品を再利用することができる。
また、センサ実装基板２を基板受け部１１ａ，１１ｂで受けて基板配置用窓１０内に設置し、蓋部材３で抜け止め状態に固定するため、センサハウジング付き軸受本体１に対するセンサ実装基板２の着脱がより一層容易となる。センサ実装基板１２に接続する配線１４は、基板配置用窓１０から外径側に取り出すため、配線１４が邪魔となることなく、センサ実装基板２の着脱が行える。特に、センサ実装基板１２にコネクタ１３を設けた場合は、配線１４が接続されていない状態でセンサ実装基板１２の着脱が行え、この回転検出機能付き滑り軸受装置を取付ける事務機器などの軸受機器内での回転検出機能付き滑り軸受装置の取り回しが容易になる。 According to the sliding bearing device with rotation detection function having the above-described configuration, the sensor mounting substrate 2 can be inserted into and removed from the end opposite to the sliding bearing portion 6 with respect to the sensor housing portion 7 integrated with the sliding bearing portion 6. It is installed. Therefore, it is easy to disassemble the sliding bearing portion 6 and the sensor mounting board 2 from each other, and when either one of the sliding bearing portion 2 or the sensor mounting board 3 becomes defective, only the defective component is replaced. It can be replaced and other parts can be reused.
Further, since the sensor mounting board 2 is received by the board receiving portions 11a and 11b and installed in the board placement window 10 and fixed in a state of being prevented from being detached by the lid member 3, the sensor mounting board 2 with respect to the bearing body 1 with the sensor housing is fixed. Detachment becomes even easier. Since the wiring 14 connected to the sensor mounting board 12 is taken out from the board placement window 10 to the outer diameter side, the sensor mounting board 2 can be attached and detached without the wiring 14 becoming an obstacle. In particular, when the connector 13 is provided on the sensor mounting board 12, the sensor mounting board 12 can be attached and detached without the wiring 14 being connected, and the inside of the bearing equipment such as office equipment to which the sliding bearing device with the rotation detecting function is attached. The sliding bearing device with the rotation detection function can be easily operated.

エンコーダ部４は、回り止め用の平坦面状係合突部４ａから軸方向に延びる突片４ｂが設けられているため、軸５との位相合わせが容易で、かつこの突片４ｂを原点検出に利用可能になる。また、突片４ｂは、蓋部材３の軸挿通穴３ｂに嵌まり込むため、軸５のＤカット形状とした平坦面部５ｂの外周で蓋部材３との間の隙間が広がることが回避され、その隙間から異物が内部に侵入すること防止する作用を果たす。 Since the encoder section 4 is provided with a projecting piece 4b extending in the axial direction from the flat surface engaging projecting section 4a for preventing rotation, the phase alignment with the shaft 5 is easy, and the origin of the projecting piece 4b is detected. Will be available. Further, since the projecting piece 4b is fitted into the shaft insertion hole 3b of the lid member 3, it is avoided that a gap between the projecting piece 4b and the lid member 3 is widened on the outer periphery of the flat surface portion 5b having the D-cut shape of the shaft 5. It acts to prevent foreign matter from entering the inside through the gap.

なお、上記実施形態では、センサ１２として３つのセンサ１２Ａ〜１２Ｃを設けたが、センサ実装基板２に実装するセンサ１２の個数、エンコーダ部４の着磁トラック２１〜２３の数を変更することにより、単純回転検出機能のみのもの、単純回転検出機能に加えて回転方向検出機能を加えたもの、さらに原点検出機能を加えたものに変更できる。組合せ例でして、次の表１に示すものがある。 In the above embodiment, the three sensors 12A to 12C are provided as the sensor 12. However, by changing the number of sensors 12 to be mounted on the sensor mounting board 2 and the number of magnetized tracks 21 to 23 of the encoder unit 4. It can be changed to a simple rotation detection function only, a simple rotation detection function plus a rotation direction detection function, and an origin detection function added. Examples of combinations are shown in Table 1 below.

センサ個数や、着磁トラック個数を種々変える場合に、センサ実装基板２の印刷配線基板２ａの配線パターンを除く形状や、エンコーダ部４の外観形状を統一したものを準備しておくと、互換性が得られる。そのため、センサ実装基板２とエンコーダ部４を変える場合にも、センサハウジング付き軸受本体１や蓋部材３は共通品が使用できる。 When changing the number of sensors and the number of magnetized tracks in various ways, it is compatible if the shape excluding the wiring pattern of the printed wiring board 2a of the sensor mounting board 2 and the appearance of the encoder unit 4 are unified. Is obtained. Therefore, even when the sensor mounting substrate 2 and the encoder unit 4 are changed, a common product can be used for the bearing body 1 with the sensor housing and the lid member 3.

１…センサハウジング付き軸受本体
２…センサ実装基板
３…蓋部材
４…エンコーダ部
４ａ…平坦面状係合突部
４ｂ…突片
５…軸
５ｂ…平坦面部
６…滑り軸受部
７…センサハウジング部
１０…基板配置用窓
１１ａ，１１ｂ…基板受け部
１２，１２Ａ〜１２Ｃ…センサ
１３…配線用コネクタ
１４…配線
２１〜２３…着磁トラック DESCRIPTION OF SYMBOLS 1 ... Bearing main body 2 with a sensor housing ... Sensor mounting substrate 3 ... Cover member 4 ... Encoder part 4a ... Flat surface-like engagement protrusion 4b ... Projection piece 5 ... Shaft 5b ... Flat surface part 6 ... Sliding bearing part 7 ... Sensor housing part DESCRIPTION OF SYMBOLS 10 ... Substrate arrangement | positioning window 11a, 11b ... Board | substrate receiving part 12, 12A-12C ... Sensor 13 ... Connector for wiring 14 ... Wiring 21-23 ... Magnetization track | truck

Claims

内周面が軸に対して接する滑り軸受部、および前記軸の外周を囲む環状のセンサハウジング部を、軸方向に並べて一体に設けたセンサハウジング付き軸受本体と、前記軸に装着されて前記センサハウジング部内に位置するエンコーダ部と、このエンコーダ部を検出するセンサが実装され前記センサハウジング部内に、前記滑り軸受部と反対側の端部から挿脱可能に装着されたセンサ実装基板とを備える回転検出機能付き滑り軸受装置。 A bearing body with a sensor housing in which a sliding bearing portion whose inner peripheral surface is in contact with the shaft and an annular sensor housing portion surrounding the outer periphery of the shaft are integrally arranged side by side in the axial direction, and the sensor mounted on the shaft A rotation provided with an encoder part located in the housing part, and a sensor mounting board in which a sensor for detecting the encoder part is mounted and removably mounted from the end opposite to the sliding bearing part in the sensor housing part Sliding bearing device with detection function.

請求項１において、前記センサハウジング部は、円周方向の一部に径方向の内外に貫通した基板配置用窓を有し、かつこの基板配置用窓内に臨む凸部または凹部からなる基板受け部を有し、前記センサ実装基板を、前記基板受け部で受けて前記基板配置用窓内に設置し、前記センサ実装基板に接続する配線を前記基板配置用窓から外径側に取り出した回転検出機能付き滑り軸受装置。 2. The substrate receiver according to claim 1, wherein the sensor housing portion has a substrate placement window penetrating inward and outward in a radial direction in a part of a circumferential direction, and includes a convex portion or a recess facing the inside of the substrate placement window. The sensor mounting board is received by the board receiving part and installed in the board placement window, and the wiring connected to the sensor mounting board is taken out from the board placement window to the outer diameter side. Sliding bearing device with detection function.

請求項２において、前記センサ実装基板におけるセンサハウジング部の外側を向く面に、前記配線の接続用のコネクタを実装した回転検出機能付き滑り軸受装置。 3. The sliding bearing device with a rotation detection function according to claim 2, wherein a connector for connecting the wiring is mounted on a surface of the sensor mounting board facing the outside of the sensor housing portion.

請求項２または請求項３において、前記センサハウジング部の前記滑り軸受部と反対側の端部の開口を前記軸の外周で封鎖するする蓋部材を、前記センサハウジング部に着脱可能に取付け、前記基板受け部で受けられた前記センサ実装基板を、前記蓋部材で抜け止めすることで前記センサハウジング部に対して固定した回転検出機能付き滑り軸受装置。 In Claim 2 or Claim 3, the lid member which seals the opening of the end opposite to the slide bearing part of the sensor housing part on the outer periphery of the shaft is detachably attached to the sensor housing part, A sliding bearing device with a rotation detection function, wherein the sensor mounting board received by the board receiving part is fixed to the sensor housing part by preventing the sensor mounting board from being removed by the lid member.

請求項１ないし請求項４のいずれか１項において、前記軸は、外周面の円周方向の一部に、平坦面で切除した形状の平坦面部を有し、前記エンコーダ部は、環状に形成されて前記軸の外周に嵌合し、かつ内周面の円周方向の一部に突出して設けられた先端が平坦面の平坦面状係合突部を前記平坦面部に係合させた回転検出機能付き滑り軸受装置。 5. The shaft according to claim 1, wherein the shaft has a flat surface portion having a shape cut by a flat surface in a part of a circumferential direction of the outer peripheral surface, and the encoder portion is formed in an annular shape. Rotating by engaging the flat surface engaging protrusion with the flat end with a flat end fitted to the outer periphery of the shaft and projecting to a part of the inner peripheral surface in the circumferential direction Sliding bearing device with detection function.

請求項１ないし請求項５のいずれか１項において、前記エンコーダは、円周方向に磁極が並ぶ環状の回転検出用着磁トラックを有する回転検出機能付き滑り軸受装置。 6. The sliding bearing device with a rotation detection function according to claim 1, wherein the encoder includes an annular rotation detection magnetized track in which magnetic poles are arranged in a circumferential direction.

請求項１ないし請求項６のいずれか１項において、前記エンコーダは、円周方向に磁極が並ぶ環状の回転検出用着磁トラックを複数列有し、両回転検出用着磁トラックは、互いに位相またはピッチが異なっていて、前記センサとして、前記各回転検出用着磁トラックをそれぞれ検出する複数のセンサを設けた回転検出機能付き滑り軸受装置。 7. The encoder according to claim 1, wherein the encoder has a plurality of rows of annular rotation detection magnetization tracks in which magnetic poles are arranged in a circumferential direction, and the rotation detection magnetization tracks are in phase with each other. Alternatively, a sliding bearing device with a rotation detection function provided with a plurality of sensors having different pitches and detecting the rotation detection magnetized tracks.

請求項１ないし請求項７のいずれか１項において、前記エンコーダは、円周方向の一部に原点検出用着磁部を有し、前記センサとして、前記原点検出用着磁部を検出するセンサを設けた回転検出機能付き滑り軸受装置。 8. The sensor according to claim 1, wherein the encoder has an origin detection magnetized portion in a part of a circumferential direction, and the sensor detects the origin detection magnetized portion as the sensor. 9. A sliding bearing device with rotation detection function provided with

請求項８において、前記軸は、外周面の円周方向の一部に、平坦面で切除した形状の平坦面部を有し、前記エンコーダ部は、環状に形成されて前記軸の外周に嵌合し、かつ内周面の円周方向の一部に突出して設けられた先端が平坦面の平坦面状係合部を前記平坦面部に係合させ、前記原点検出用着磁部を、前記エンコーダ部の前記平坦面状係合突部から軸方向に突出させた突片に設けた回転検出機能付き滑り軸受装置。 9. The shaft according to claim 8, wherein the shaft has a flat surface portion having a shape cut by a flat surface in a part of a circumferential direction of the outer peripheral surface, and the encoder portion is formed in an annular shape and is fitted to the outer periphery of the shaft. And a flat surface-like engaging portion having a flat surface with a tip projecting from a part of the inner peripheral surface in the circumferential direction is engaged with the flat surface portion, and the origin detecting magnetized portion is connected to the encoder. A sliding bearing device with a rotation detection function provided on a projecting piece projecting in an axial direction from the flat surface-shaped engaging projecting portion.

請求項１ないし請求項９のいずれか１項において、事務機器の軸の支持に用いられる回転検出機能付き滑り軸受装置。 The sliding bearing device with a rotation detection function according to any one of claims 1 to 9, which is used for supporting a shaft of an office machine.