JP6665511B2 - Method of manufacturing protective cover having sensor holder, and method of manufacturing bearing device provided with the protective cover - Google Patents

Method of manufacturing protective cover having sensor holder, and method of manufacturing bearing device provided with the protective cover Download PDF

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JP6665511B2
JP6665511B2 JP2015242102A JP2015242102A JP6665511B2 JP 6665511 B2 JP6665511 B2 JP 6665511B2 JP 2015242102 A JP2015242102 A JP 2015242102A JP 2015242102 A JP2015242102 A JP 2015242102A JP 6665511 B2 JP6665511 B2 JP 6665511B2
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cup
protective cover
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sensor holder
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JP2016156497A (en
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通之 上地
通之 上地
成嘉 中村
成嘉 中村
俊也 駒井
俊也 駒井
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Nakanishi Metal Works Co Ltd
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Priority to US15/045,593 priority Critical patent/US20160244040A1/en
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本発明は、軸受の外輪に圧入されて磁気エンコーダを被うカップ状の保護カバーに関わり、さらに詳しくは、前記磁気エンコーダに対向する磁気センサを保持するセンサホルダ部を有する保護カバーに関する。   The present invention relates to a cup-shaped protective cover which is press-fitted into an outer ring of a bearing and covers a magnetic encoder, and more particularly to a protective cover having a sensor holder for holding a magnetic sensor facing the magnetic encoder.

自動車に広く普及している、車輪のロックを無くして効率良く安全に制動するアンチロックブレーキシステムは、例えば、回転速度検出装置（車輪速センサ）により各車輪の回転速度を検出し、制御装置により加速度及び減速度を演算するとともに車体速度とスリップ率を推定し、その結果に基づいてアクチュエータを駆動してブレーキ液圧の制御を行うものである。
このような回転速度検出装置を自動車のホイール支持用の転がり軸受（ハブベアリング）に備えた軸受装置も広く用いられており、Ｎ極とＳ極を一定間隔で周方向に交互に並べた磁気エンコーダを軸受の内輪に取り付け、前記磁気エンコーダの回転を検知するための磁気センサを前記磁気エンコーダに対向させて軸受の外輪に取り付けるとともに、前記磁気エンコーダを保護するように前記磁気エンコーダをインナー側から被う保護カバーを前記外輪のインナー側の端部に圧入したものがある（例えば、特許文献１参照）。
前記保護カバーにより、前記磁気エンコーダに小石や泥水等が当たらないことから前記磁気エンコーダの破損を防止できるとともに、前記磁気エンコーダのアウター側のシール部材が不要になることから摺動抵抗の低減により前記軸受装置の回転トルクを低減できる。
また、前記磁気エンコーダと前記磁気センサとのエアギャップ調整作業の煩雑さを解消するために、前記磁気センサを保持するセンサホルダ部を有する前記保護カバーとして、非磁性体の鋼板をプレス加工によりカップ状に形成したカップ状本体部（キャップ）の底部の一部に合成樹脂からなるボス部を一体に接合し、このボス部に前記磁気センサを固定するナットを一体に接合したものがある（例えば、特許文献２参照）。 An anti-lock brake system, widely used in automobiles, that efficiently and safely brakes by eliminating wheel locks, detects, for example, the rotation speed of each wheel using a rotation speed detection device (wheel speed sensor), and uses a control device to detect the rotation speed of each wheel. The acceleration and the deceleration are calculated, the vehicle speed and the slip ratio are estimated, and the actuator is driven based on the results to control the brake fluid pressure.
A bearing device in which such a rotational speed detecting device is provided in a rolling bearing (hub bearing) for supporting a wheel of an automobile is also widely used, and a magnetic encoder in which N poles and S poles are alternately arranged in a circumferential direction at regular intervals. Is mounted on the inner ring of the bearing, and a magnetic sensor for detecting the rotation of the magnetic encoder is mounted on the outer ring of the bearing so as to face the magnetic encoder, and the magnetic encoder is covered from the inner side so as to protect the magnetic encoder. In some cases, a protective cover is press-fitted to the inner end of the outer ring (for example, see Patent Document 1).
With the protective cover, the magnetic encoder can be prevented from being damaged by pebbles, muddy water, or the like, so that the magnetic encoder can be prevented from being damaged, and a seal member on the outer side of the magnetic encoder is not required. The rotational torque of the bearing device can be reduced.
Further, in order to eliminate the complexity of the air gap adjustment work between the magnetic encoder and the magnetic sensor, a non-magnetic steel plate is pressed by a cup as the protective cover having a sensor holder for holding the magnetic sensor. A boss made of synthetic resin is integrally joined to a part of the bottom of a cup-shaped body (cap) formed in a shape, and a nut for fixing the magnetic sensor is integrally joined to this boss (for example, And Patent Document 2).

特開２０１１−０８４２６５号公報JP 2011-084265 A 特開２０１３−１１７４５５号公報JP 2013-117455 A

特許文献２のようなセンサホルダ部を有する保護カバーの構造において、カップ状本体部（キャップ）の底部の一部への合成樹脂からなるボス部の接合は、接着によるのが一般的である。したがって、前記底部の接着面に微小なディンプルを形成したとしても、長期間の使用、及びその使用環境によっては、カップ状本体部とボス部との固着力が弱まってボス部が脱落する等、信頼性が低下するおそれがある。   In the structure of the protective cover having the sensor holder as disclosed in Patent Document 2, the boss made of synthetic resin is generally bonded to a part of the bottom of the cup-shaped main body (cap) by adhesion. Therefore, even if minute dimples are formed on the adhesive surface of the bottom portion, depending on the long-term use, and the use environment, the boss portion falls off due to weakening of the fixing force between the cup-shaped main body portion and the boss portion. Reliability may be reduced.

そこで本発明が前述の状況に鑑み、解決しようとするところは、センサホルダ部を有する保護カバーの製造方法、及び前記保護カバーを備えた軸受装置の製造方法を提供する点にある。
The present invention has been made in view of the above-described circumstances, and has an object to provide a method of manufacturing a protective cover having a sensor holder and a method of manufacturing a bearing device including the protective cover.

本発明に係るセンサホルダ部を有する保護カバーの製造方法は、前記課題解決のために、外周面に内輪軌道面が形成された内輪、及び内周面に外輪軌道面が形成された外輪、並びに、前記内輪軌道面及び前記外輪軌道面間を転動する転動体を有する軸受、前記軸受の軸方向の一端部に位置して前記内輪に固定された、Ｎ極とＳ極を一定間隔で周方向に交互に並べてなる磁気エンコーダ、並びに、前記磁気エンコーダの磁極に対向して前記磁気エンコーダの回転を検知するための磁気センサを備えた軸受装置に用いられる保護カバーの製造方法であって、
前記保護カバーが、前記軸受の軸方向の一端部に位置して前記外輪に圧入される、非磁性体の鋼板をカップ状に成形したカップ状本体部、及び、前記磁気センサを取り付けるためのナットを保持しながら前記カップ状本体部に一体接合された合成樹脂製のセンサホルダ部を有するものであり、前記カップ状本体部は、その底部に通孔が形成されたものであり、
前記カップ状本体部をプレス加工により成形するプレス加工工程と、
前記ナット及び前記カップ状本体部をインサート品として金型内にセットし、型締めした後、溶融したプラスチックをキャビティ内に充填することにより、前記ナット及び前記カップ状本体部と一体化された前記センサホルダ部に、前記通孔を通って前記底部の内面側で径方向外方へ延びる回り込み部を形成するように射出成形を行う射出成形工程と、
を含むことを特徴とする（請求項１）。
A method for manufacturing a protective cover having a sensor holder portion according to the present invention includes: an inner ring having an inner raceway surface formed on an outer peripheral surface; an outer ring having an outer raceway surface formed on an inner peripheral surface; A bearing having rolling elements rolling between the inner raceway surface and the outer raceway surface; and N-poles and S-poles fixed to the inner race at one end in the axial direction of the bearing. A magnetic encoder alternately arranged in a direction, and a method of manufacturing a protective cover used in a bearing device including a magnetic sensor for detecting rotation of the magnetic encoder facing a magnetic pole of the magnetic encoder,
The protection cover is located at one end in the axial direction of the bearing and is press-fitted into the outer ring, a cup-shaped main body formed by molding a nonmagnetic steel plate into a cup shape, and a nut for attaching the magnetic sensor. Having a sensor holder made of synthetic resin integrally joined to the cup-shaped main body while holding the cup-shaped main body, wherein the cup-shaped main body has a through hole formed at the bottom thereof,
A press working step of forming the cup-shaped main body by press working,
The nut and the cup-shaped main body are set as inserts in a mold, and after clamping, the molten plastic is filled in the cavity, thereby integrating the nut and the cup-shaped main body with the nut. Injection molding step of performing injection molding on the sensor holder portion so as to form a wraparound portion extending radially outward on the inner surface side of the bottom portion through the through hole,
(Claim 1 ).

このような製造方法により製造された保護カバーを、内輪に磁気エンコーダが固定された軸受の外輪に圧入することにより、磁気エンコーダに対して保護カバーが軸方向に位置決めされるとともに、保護カバーのセンサホルダ部により磁気センサが保護カバーに対して軸方向に位置決めされた状態で保持されるので、磁気エンコーダに対する磁気センサのエアギャップ調整が完了する。
よって、磁気エンコーダと磁気センサとのエアギャップ調整作業の煩雑さを解消できる。
その上、前記製造方法によれば、ナット及びカップ状本体部をインサート品として行った射出成形により、ナット及びカップ状本体部と一体化された合成樹脂製のセンサホルダ部に、カップ状本体部の底部の通孔を通って前記底部の内面側で径方向外方へ延びる回り込み部が形成される。
したがって、このような製造方法により製造された保護カバーにおいて、カップ状本体部とセンサホルダ部とが機械的に結合する。よって、カップ状本体部とセンサホルダ部との固着力が大きくなるため、カップ状本体部とセンサホルダ部との結合の高い信頼性を長期間にわたって確保できる。 By press-fitting the protective cover manufactured by such a manufacturing method into an outer ring of a bearing having a magnetic encoder fixed to an inner ring, the protective cover is positioned in the axial direction with respect to the magnetic encoder, and a sensor of the protective cover is provided. Since the magnetic sensor is held by the holder in a state of being positioned in the axial direction with respect to the protective cover, adjustment of the air gap of the magnetic sensor with respect to the magnetic encoder is completed.
Therefore, the complexity of the air gap adjustment work between the magnetic encoder and the magnetic sensor can be eliminated.
In addition, according to the manufacturing method, the cup-shaped main body portion is formed on the synthetic resin sensor holder portion integrated with the nut and the cup-shaped main body portion by injection molding using the nut and the cup-shaped main body portion as an insert product. A wrap portion extending radially outward on the inner surface side of the bottom portion through a through hole in the bottom portion is formed.
Therefore, in the protective cover manufactured by such a manufacturing method, the cup-shaped main body and the sensor holder are mechanically coupled. Therefore, since the fixing force between the cup-shaped main body and the sensor holder is increased, high reliability of the connection between the cup-shaped main body and the sensor holder can be ensured for a long time.

ここで、前記カップ状本体部の前記通孔の周囲に無端状のシール体を加硫接着する加硫接着工程、及び前記周囲に熱硬化性接着剤を塗布する接着剤塗布工程の少なくともどちらかの工程を有するのが好ましい（請求項２）。
このような製造方法によれば、カップ状本体部の底部に通孔を形成しても、前記加硫接着工程又は前記接着剤塗布工程により、前記通孔の周囲のシール体又は接着剤層がカップ状本体部及びセンサホルダ部間に介在するので、保護カバーの気密性を保持できる。
Here, at least one of a vulcanization bonding step of vulcanizing and bonding an endless seal body around the through hole of the cup-shaped main body and an adhesive application step of applying a thermosetting adhesive to the periphery. (Claim 2 ).
According to such a manufacturing method, even if a through-hole is formed in the bottom of the cup-shaped main body, the sealing body or the adhesive layer around the through-hole is formed by the vulcanization bonding step or the adhesive application step. Since the protective cover is interposed between the cup-shaped main body and the sensor holder, the airtightness of the protective cover can be maintained.

また、前記カップ状本体部の底部が、最底部である円盤部、前記円盤部の外周縁から軸方向に延びる円筒部、前記円筒部の軸方向端縁から径方向外方に延びる円環部を有するものであり、前記センサホルダ部が前記円盤部及び前記円筒部を被う部分を有するようにしてもよい（請求項３）。
このような製造方法によれば、プレス加工工程で成形されるカップ状本体部の底部が、最底部である円盤部、前記円盤部の外周縁から軸方向に延びる円筒部、前記円筒部の軸方向端縁から径方向外方に延びる円環部を有するものであり、射出成形工程で成形されるセンサホルダ部が、カップ状本体部の通孔が形成された円盤部及び円盤部の外周縁から軸方向に延びる円筒部により形成される段部を被う部分を有する。よって、前記加硫接着工程や前記接着剤塗布工程を設けなくても、前記製造方法により製造された保護カバーにおいて一定の気密性を保つ効果があるため、製造コストを低減できる。
Further, the bottom of the cup-shaped main body portion is a disk portion which is the lowest portion, a cylindrical portion extending in an axial direction from an outer peripheral edge of the disk portion, and a ring portion extending radially outward from an axial end edge of the cylindrical portion. The sensor holder may include a portion that covers the disk portion and the cylindrical portion (Claim 3 ).
According to such a manufacturing method, the bottom of the cup-shaped main body formed in the press working step has a disk portion that is the lowest portion, a cylindrical portion extending in the axial direction from the outer peripheral edge of the disk portion, and a shaft of the cylindrical portion. The sensor holder formed in the injection molding step is formed of a disc-shaped portion having a through hole formed in the cup-shaped main body and an outer peripheral edge of the disc-shaped portion. And a portion that covers a step formed by a cylindrical portion extending in the axial direction from the cylinder. Therefore, even if the vulcanization bonding step and the adhesive application step are not provided, the protective cover manufactured by the manufacturing method has an effect of maintaining a certain airtightness, and thus the manufacturing cost can be reduced.

さらに、本発明に係るセンサホルダ部を有する保護カバーの製造方法は、前記課題解決のために、外周面に内輪軌道面が形成された内輪、及び内周面に外輪軌道面が形成された外輪、並びに、前記内輪軌道面及び前記外輪軌道面間を転動する転動体を有する軸受、前記軸受の軸方向の一端部に位置して前記内輪に固定された、Ｎ極とＳ極を一定間隔で周方向に交互に並べてなる磁気エンコーダ、並びに、前記磁気エンコーダの磁極に対向して前記磁気エンコーダの回転を検知するための磁気センサを備えた軸受装置に用いられる保護カバーの製造方法であって、
前記保護カバーが、前記軸受の軸方向の一端部に位置して前記外輪に圧入される、非磁性体の鋼板をカップ状に成形したカップ状本体部、及び、前記磁気センサを取り付けるためのナットを保持しながら前記カップ状本体部に一体接合された合成樹脂製のセンサホルダ部を有するものであり、
前記カップ状本体部は、その底部が、最底部である円盤部、前記円盤部の外周縁から軸方向に延びる円筒部、前記円筒部の軸方向端縁から径方向外方に延びる円環部を有するものであるとともに、前記円筒部には凹部又は凸部が形成されたものであり、
前記カップ状本体部をプレス加工により成形するプレス加工工程と、
前記ナット及び前記カップ状本体部をインサート品として金型内にセットし、型締めした後、溶融したプラスチックをキャビティ内に充填することにより、前記ナット及び前記カップ状本体部と一体化された前記センサホルダ部に、前記円盤部及び前記円筒部により形成される段部を被う段部被い部を形成するように射出成形を行う射出成形工程と、
を含むことを特徴とする（請求項４）。
Further, the method for manufacturing a protective cover having a sensor holder portion according to the present invention is, in order to solve the above-mentioned problems, an inner race having an inner raceway surface formed on an outer peripheral surface, and an outer race having an outer raceway surface formed on an inner peripheral surface. A bearing having a rolling element that rolls between the inner raceway surface and the outer raceway surface; an N-pole and an S-pole fixed to the inner race at one end in the axial direction of the bearing; A magnetic encoder arranged alternately in the circumferential direction, and a method of manufacturing a protective cover used in a bearing device provided with a magnetic sensor for detecting rotation of the magnetic encoder facing a magnetic pole of the magnetic encoder. ,
The protection cover is located at one end in the axial direction of the bearing and is press-fitted into the outer ring, a cup-shaped main body formed by molding a nonmagnetic steel plate into a cup shape, and a nut for attaching the magnetic sensor. Having a sensor holder made of synthetic resin integrally joined to the cup-shaped main body while holding
The cup-shaped body portion has a bottom portion, a disk portion being a bottommost portion, a cylindrical portion extending in an axial direction from an outer peripheral edge of the disk portion, and an annular portion extending radially outward from an axial end edge of the cylindrical portion. And a concave portion or a convex portion is formed on the cylindrical portion,
A press working step of forming the cup-shaped main body by press working,
The nut and the cup-shaped main body are set as inserts in a mold, and after clamping, the molten plastic is filled in the cavity, thereby integrating the nut and the cup-shaped main body with the nut. An injection molding step of performing injection molding on the sensor holder portion so as to form a step covering portion covering a step formed by the disk portion and the cylindrical portion,
(Claim 4 ).

このような製造方法により製造された保護カバーを、内輪に磁気エンコーダが固定された軸受の外輪に圧入することにより、磁気エンコーダに対して保護カバーが軸方向に位置決めされるとともに、保護カバーのセンサホルダ部により磁気センサが保護カバーに対して軸方向に位置決めされた状態で保持されるので、磁気エンコーダに対する磁気センサのエアギャップ調整が完了する。
よって、磁気エンコーダと磁気センサとのエアギャップ調整作業の煩雑さを解消できる。
その上、前記製造方法によれば、ナット及びカップ状本体部をインサート品として行った射出成形により、ナット及びカップ状本体部と一体化された合成樹脂製のセンサホルダ部に、カップ状本体部の円盤部及び円筒部により形成される段部を被う段部被い部が形成される。また、センサホルダ部の合成樹脂が、カップ状本体部の円筒部に形成された凹部又は凸部に係合する。
したがって、このような製造方法により製造された保護カバーにおいて、カップ状本体部とセンサホルダ部とが機械的に結合する。よって、カップ状本体部とセンサホルダ部との固着力が大きくなるため、カップ状本体部とセンサホルダ部との結合の高い信頼性を長期間にわたって確保できる。 By press-fitting the protective cover manufactured by such a manufacturing method into an outer ring of a bearing having a magnetic encoder fixed to an inner ring, the protective cover is positioned in the axial direction with respect to the magnetic encoder, and a sensor of the protective cover is provided. Since the magnetic sensor is held by the holder in a state of being positioned in the axial direction with respect to the protective cover, adjustment of the air gap of the magnetic sensor with respect to the magnetic encoder is completed.
Therefore, the complexity of the air gap adjustment work between the magnetic encoder and the magnetic sensor can be eliminated.
In addition, according to the manufacturing method, the cup-shaped main body portion is formed on the synthetic resin sensor holder portion integrated with the nut and the cup-shaped main body portion by injection molding using the nut and the cup-shaped main body portion as an insert product. A step covering portion covering the step formed by the disk portion and the cylindrical portion is formed. Further, the synthetic resin of the sensor holder engages with the concave or convex portion formed in the cylindrical portion of the cup-shaped main body.
Therefore, in the protective cover manufactured by such a manufacturing method, the cup-shaped main body and the sensor holder are mechanically coupled. Therefore, since the fixing force between the cup-shaped main body and the sensor holder is increased, high reliability of the connection between the cup-shaped main body and the sensor holder can be ensured for a long time.

さらにまた、本発明に係る軸受装置の製造方法は、外周面に内輪軌道面が形成された内輪、及び内周面に外輪軌道面が形成された外輪、並びに、前記内輪軌道面及び前記外輪軌道面間を転動する転動体を有する軸受、前記軸受の軸方向の一端部に位置して前記内輪に固定された、Ｎ極とＳ極を一定間隔で周方向に交互に並べてなる磁気エンコーダ、並びに、前記磁気エンコーダの磁極に対向して前記磁気エンコーダの回転を検知するための磁気センサを備えた軸受装置の製造方法であって、前記センサホルダ部を有する保護カバーの製造方５）。
Still further, the method of manufacturing a bearing device according to the present invention provides an inner ring having an inner raceway surface formed on an outer peripheral surface, an outer ring having an outer raceway surface formed on an inner peripheral surface, and the inner raceway surface and the outer raceway. A bearing having a rolling element that rolls between the surfaces, a magnetic encoder which is fixed to the inner ring at one end in the axial direction of the bearing, and in which N poles and S poles are alternately arranged in a circumferential direction at regular intervals; And a method of manufacturing a bearing device provided with a magnetic sensor for detecting rotation of the magnetic encoder facing a magnetic pole of the magnetic encoder, the method including manufacturing the protective cover having the sensor holder part 5 ).

以上のようなセンサホルダ部を有する保護カバーの製造方法、及び前記保護カバーを備えた軸受装置の製造方法によれば、インサート成形品（保護カバー）の合成樹脂（センサホルダ部）がインサート品（カップ状本体部）と機械的に結合する。よって、インサート品と合成樹脂との固着力が大きくなるため、インサート品と合成樹脂との結合の高い信頼性を長期間にわたって確保できるという顕著な効果を奏する。 Method for producing a protective cover having a sensor holder as described above, and according to the method of manufacturing a bearing device provided with the protective cover, the synthetic resin (sensor holder) of the insert molding (protective cover) is insert article ( (Cup-shaped main body). Therefore, since the fixing force between the insert product and the synthetic resin is increased, a remarkable effect that high reliability of the connection between the insert product and the synthetic resin can be secured for a long period of time is achieved.

本発明の実施の形態１に係るセンサホルダ部を有する保護カバーを備えた軸受装置の部分縦断面図である。FIG. 2 is a partial longitudinal sectional view of the bearing device provided with the protective cover having the sensor holder according to Embodiment 1 of the present invention. 本発明の実施の形態１に係るセンサホルダ部を有する保護カバーに磁気センサを装着した状態を示す要部拡大縦断面斜視図である。FIG. 4 is an enlarged vertical cross-sectional perspective view of a main part showing a state where the magnetic sensor is mounted on the protective cover having the sensor holder according to Embodiment 1 of the present invention. 射出成形金型の一例を示す縦断面図である。It is a longitudinal section showing an example of an injection mold. 本発明の実施の形態２に係るセンサホルダ部を有する保護カバーを備えた軸受装置の部分縦断面図である。FIG. 9 is a partial longitudinal sectional view of a bearing device provided with a protective cover having a sensor holder according to Embodiment 2 of the present invention. 本発明の実施の形態２に係るセンサホルダ部を有する保護カバーに磁気センサを装着した状態を示す要部拡大縦断面斜視図である。FIG. 11 is an enlarged vertical cross-sectional perspective view of a main part showing a state where a magnetic sensor is mounted on a protective cover having a sensor holder according to a second embodiment of the present invention. 本発明の実施の形態３に係るセンサホルダ部を有する保護カバーを備えた軸受装置の部分縦断面図である。FIG. 14 is a partial longitudinal sectional view of a bearing device provided with a protective cover having a sensor holder according to Embodiment 3 of the present invention. 本発明の実施の形態３に係るセンサホルダ部を有する保護カバーに磁気センサを装着した状態を示す要部拡大縦断面斜視図である。FIG. 14 is an enlarged vertical cross-sectional perspective view of a main part showing a state where a magnetic sensor is mounted on a protective cover having a sensor holder according to a third embodiment of the present invention. 同じく部分縦断面図である。FIG. 射出成形金型の一例を示す縦断面図である。It is a longitudinal section showing an example of an injection mold.

次に本発明の実施の形態を添付図面に基づき詳細に説明するが、本発明は、添付図面に示された形態に限定されず特許請求の範囲に記載の要件を満たす実施形態の全てを含むものである。   Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all embodiments satisfying the requirements described in the claims. It is a thing.

実施の形態１．
図１の部分縦断面図に示す本発明の実施の形態１に係る軸受装置１１は、外輪１３に対して内輪１２が回転する軸受の他に、前記軸受の軸方向の一端部に配置した、磁気エンコーダ１６、保護カバー１、及び磁気センサＡ、並びに前記軸受の軸方向の他端部に配置したシール部材１５等を備える。
前記軸受は、外周面に内輪軌道面１２Ａが形成された内輪１２、及び内周面に外輪軌道面１３Ａが形成された外輪１３、並びに、内輪軌道面１２Ａ及び外輪軌道面１３Ａ間を転動する転動体１４，１４，…等を有する。
磁気エンコーダ１６は、Ｎ極とＳ極を一定間隔で周方向に交互に並べたものであり、前記軸受の軸方向の一端部に位置する支持部材１７により内輪１２に固定される。
保護カバー１は、前記軸受の軸方向の一端部を密封するように外輪１３に取り付けられ、磁気センサＡを保持するセンサホルダ部８を有する。
保護カバー１のセンサホルダ部８に装着された磁気センサＡは、磁気エンコーダ１６に対向し、磁気エンコーダ１６の回転を検知する。 Embodiment 1 FIG.
The bearing device 11 according to the first embodiment of the present invention shown in the partial longitudinal sectional view of FIG. 1 is arranged at one axial end of the bearing in addition to the bearing in which the inner ring 12 rotates with respect to the outer ring 13. It includes a magnetic encoder 16, a protective cover 1, a magnetic sensor A, and a seal member 15 disposed at the other axial end of the bearing.
The bearing rolls between the inner ring 12 having the inner raceway surface 12A formed on the outer peripheral surface, the outer ring 13 having the outer raceway surface 13A formed on the inner peripheral surface, and the inner raceway surface 12A and the outer raceway surface 13A. , And the like.
The magnetic encoder 16 has N poles and S poles alternately arranged in the circumferential direction at regular intervals, and is fixed to the inner race 12 by a support member 17 located at one axial end of the bearing.
The protective cover 1 is attached to the outer ring 13 so as to seal one end in the axial direction of the bearing, and has a sensor holder 8 for holding the magnetic sensor A.
The magnetic sensor A mounted on the sensor holder 8 of the protective cover 1 faces the magnetic encoder 16 and detects the rotation of the magnetic encoder 16.

図１に示す軸受装置１１において、内輪１２に磁気エンコーダ１６が固定された軸受の外輪１３に対し、保護カバー１のカップ状本体部１Ａを圧入することにより、磁気エンコーダ１６に対して保護カバー１が軸方向に位置決めされる。
また、保護カバー１のセンサホルダ部８により磁気センサＡが保護カバー１に対して軸方向に位置決めされた状態で保持されているので、磁気エンコーダ１６に対する磁気センサＡのエアギャップ調整が完了する。
よって、磁気エンコーダ１６と磁気センサＡとのエアギャップ調整作業の煩雑さを解消できる。 In the bearing device 11 shown in FIG. 1, the cup-shaped main body 1A of the protective cover 1 is press-fitted into the outer ring 13 of the bearing in which the magnetic encoder 16 is fixed to the inner ring 12, so that the magnetic encoder 16 is protected. Are positioned in the axial direction.
Further, since the magnetic sensor A is held in a state of being axially positioned with respect to the protective cover 1 by the sensor holder portion 8 of the protective cover 1, adjustment of the air gap of the magnetic sensor A with respect to the magnetic encoder 16 is completed.
Therefore, the complexity of the work of adjusting the air gap between the magnetic encoder 16 and the magnetic sensor A can be eliminated.

図１の部分縦断面図、及び図２の要部拡大縦断面斜視図に示すように、本発明の実施の形態１に係る保護カバー１は、非磁性体の鋼板をプレス加工によりカップ状に成形したカップ状本体部１Ａ、及び、磁気センサＡを取り付けるための取付ボルトＢが螺合するナット１０を保持しながらカップ状本体部１Ａに一体接合された合成樹脂製のセンサホルダ部８を有する。
ここで、保護カバー１はインサート成形品であり、カップ状本体部１Ａ及びナット１０がインサート品である。 As shown in the partial longitudinal sectional view of FIG. 1 and the enlarged longitudinal perspective view of the main part of FIG. 2, the protective cover 1 according to the first embodiment of the present invention is formed by pressing a nonmagnetic steel plate into a cup shape by pressing. It has a molded cup-shaped main body 1A and a synthetic resin sensor holder 8 integrally joined to the cup-shaped main body 1A while holding a nut 10 to which a mounting bolt B for mounting the magnetic sensor A is screwed. .
Here, the protective cover 1 is an insert molded product, and the cup-shaped main body 1A and the nut 10 are insert products.

カップ状本体部１Ａは、外輪１３に圧入される第１円筒部２、第１円筒部２よりも縮径して第１円筒部２の端縁に繋がり、外周面にシール体７が加硫接着された第２円筒部３、第２円筒部３の端縁に繋がって径方向内方へ延びる円環部４、円環部４の内径側端縁に繋がって軸方向に延びる第３円筒部５、及び第３円筒部５の端縁に繋がる円盤部６からなり、円盤部６（カップ状本体部１Ａの底部）には通孔６Ａが形成される。
ここで、カップ状本体部１Ａの底部は、最底部である円盤部６、円盤部６の外周縁から軸方向に延びる第３円筒部５、第３円筒部５の軸方向端縁から径方向外方に延びる円環部４を有し、円盤部６及び円盤部６の外周縁から軸方向に延びる第３円筒部５により形成される段部Ｃ（図２参照）を有する。 The cup-shaped main body 1A has a diameter smaller than that of the first cylindrical portion 2 and the first cylindrical portion 2 that is press-fitted into the outer ring 13, and is connected to an edge of the first cylindrical portion 2. The bonded second cylindrical portion 3, the annular portion 4 connected to the edge of the second cylindrical portion 3 and extending inward in the radial direction, and the third cylinder connected to the inner diameter side edge of the annular portion 4 and extending in the axial direction A portion 5 and a disk portion 6 connected to the edge of the third cylindrical portion 5 are provided. A through hole 6A is formed in the disk portion 6 (the bottom of the cup-shaped main body 1A).
Here, the bottom of the cup-shaped main body 1 </ b> A is located at the bottom of the disk portion 6, the third cylindrical portion 5 extending in the axial direction from the outer peripheral edge of the disk portion 6, It has an annular portion 4 extending outward, and has a step portion C (see FIG. 2) formed by a disk portion 6 and a third cylindrical portion 5 extending in the axial direction from the outer peripheral edge of the disk portion 6.

カップ状本体部１Ａと一体化されたセンサホルダ部８は、ナット１０を保持する基部８Ａ、及び円盤部６の通孔６Ａを通ってカップ状本体部１Ａの内面側で径方向外方へ延びる回り込み部８Ｂを有し、基部８Ａは、円盤部６及び第３円筒部５を被う部分を有する。
また、通孔６Ａの周囲でカップ状本体部１Ａ及びセンサホルダ部８間には、無端状のシール体Ｓが介在する。 The sensor holder portion 8 integrated with the cup-shaped main body portion 1A extends radially outward on the inner surface side of the cup-shaped main body portion 1A through the base portion 8A holding the nut 10 and the through hole 6A of the disk portion 6. It has a wraparound portion 8B, and the base portion 8A has a portion that covers the disk portion 6 and the third cylindrical portion 5.
An endless seal S is interposed between the cup-shaped main body 1A and the sensor holder 8 around the through hole 6A.

ここで、シール体７及びＳは、合成ゴム等の弾性体であり、ニトリルゴム（ＮＢＲ）、水素化ニトリルゴム（ＨＮＢＲ）、アクリルゴム（ＡＣＭ）、エチレン・アクリルゴム（ＡＥＭ）、フッ素ゴム（ＦＫＭ、ＦＰＭ）、シリコーンゴム（ＶＱＭ）等のゴムから、１種、あるいは２種以上のゴムを適当にブレンドして使用することができる。   Here, the seal bodies 7 and S are elastic bodies such as synthetic rubbers, and include nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), acrylic rubber (ACM), ethylene acrylic rubber (AEM), and fluoro rubber ( FKM, FPM) and silicone rubber (VQM) can be used by appropriately blending one or more rubbers.

次に、センサホルダ部８を有する保護カバー１の製造方法について説明する。
＜プレス加工工程＞
保護カバー１を構成するカップ状本体部１Ａを、例えばオーステナイト系ステンレス鋼製の板材からプレス加工により成形するプレス加工工程を行う。 Next, a method for manufacturing the protective cover 1 having the sensor holder 8 will be described.
<Pressing process>
A press working step of forming the cup-shaped main body 1A constituting the protective cover 1 from a plate made of, for example, austenitic stainless steel by press working is performed.

＜加硫接着工程＞
前記プレス加工工程で成形されたカップ状本体部１Ａの第２円筒部３の外周面にシール体７を加硫接着するとともに、円盤部６の通孔６Ａの周囲に無端状（例えば円環状）のシール体Ｓを加硫接着する加硫接着工程を行う。
なお、シール体Ｓに換えて円盤部６の通孔６Ａの周囲に熱硬化性接着剤を塗布する接着剤塗布工程を行ってもよく、あるいはシール体Ｓを加硫接着する加硫接着工程及び熱硬化性接着剤を塗布する接着剤塗布工程の両方を行ってもよい。 <Vulcanization bonding process>
The sealing body 7 is vulcanized and bonded to the outer peripheral surface of the second cylindrical portion 3 of the cup-shaped main body 1A formed in the press working step, and is endless (for example, annular) around the through hole 6A of the disk portion 6. A vulcanization bonding step of vulcanizing and bonding the seal body S is performed.
Note that an adhesive application step of applying a thermosetting adhesive around the through hole 6A of the disk portion 6 instead of the seal body S may be performed, or a vulcanization bonding step of vulcanizing and bonding the seal body S; Both of the adhesive application steps of applying a thermosetting adhesive may be performed.

＜射出成形工程＞
図３の縦断面図に示す射出成形金型において、先ず、固定型１８の支持軸２１にインサート品であるナット１０をセットする。
また、前記プレス加工工程で成形され、前記加硫接着工程を経た、インサート品であるカップ状本体部１Ａを可動型１９にセットする。
次に、射出成形機に取り付けられた固定型１８及び可動型１９を型締めした状態で、溶融したプラスチックをスプルーから注入してゲート２０から固定型１８及び可動型１９間のキャビティ内に充填する。
次に、溶融したプラスチックを冷却・固化させた後、可動型１９を開いてインサート成形品を取り出す。
このような射出成形工程を経た保護カバー１（図１及び図２参照）は、ナット１０の周溝１０Ａに合成樹脂が入り込んでいるのでナット１０の抜け止めがされるとともに、円盤部６の通孔６Ａを通って径方向外方へ合成樹脂が回り込んで回り込み部８Ｂが形成されているので、カップ状本体部１Ａとセンサホルダ部８は機械的に結合する。 <Injection molding process>
In the injection mold shown in the longitudinal sectional view of FIG. 3, first, the nut 10 as an insert product is set on the support shaft 21 of the fixed mold 18.
Further, the cup-shaped main body 1A, which is an insert product, which has been formed in the press working step and has undergone the vulcanization bonding step, is set on the movable mold 19.
Next, in a state where the fixed mold 18 and the movable mold 19 attached to the injection molding machine are clamped, molten plastic is injected from a sprue and filled from the gate 20 into the cavity between the fixed mold 18 and the movable mold 19. .
Next, after the molten plastic is cooled and solidified, the movable mold 19 is opened to take out the insert molded product.
In the protective cover 1 having undergone such an injection molding process (see FIGS. 1 and 2), since the synthetic resin has entered the circumferential groove 10A of the nut 10, the nut 10 is prevented from coming off, and the disk portion 6 is prevented from slipping. Since the synthetic resin extends radially outward through the hole 6A to form the wraparound portion 8B, the cup-shaped main body portion 1A and the sensor holder portion 8 are mechanically coupled.

また、円盤部６の通孔６Ａの周囲のカップ状本体部１Ａ及びセンサホルダ部８間には、シール体Ｓ及び接着剤層の一方又は両方が介在するので、保護カバー１の気密性が保持される。
なお、センサホルダ部８の基部８Ａは、円盤部６及び第３円筒部５（図２に示す段部Ｃ）を被う部分を有するので、シール体Ｓや接着剤層が無くても一定の気密性を保つ効果があるため、要求仕様によってはシール体Ｓ又は接着剤層を無くしてもよい。 Further, since one or both of the seal body S and the adhesive layer are interposed between the cup-shaped main body 1A and the sensor holder 8 around the through hole 6A of the disk 6, the airtightness of the protective cover 1 is maintained. Is done.
Since the base 8A of the sensor holder 8 has a portion that covers the disk 6 and the third cylindrical portion 5 (the step C shown in FIG. 2), the base 8A is constant even without the seal S or the adhesive layer. Since there is an effect of maintaining airtightness, the seal body S or the adhesive layer may be omitted depending on required specifications.

実施の形態２．
図４の部分縦断面図に示す本発明の実施の形態２に係る軸受装置１１及び保護カバー１、並びに図５の要部拡大縦断面斜視図に示す本発明の実施の形態２に係る保護カバー１において、実施の形態１の図１及び図２と同一符号は同一又は相当部分を示しているので、同一部分についての説明は省略する。
実施の形態２の保護カバー１のカップ状本体部１Ａは、外輪１３に圧入される第１円筒部２、第１円筒部２よりも縮径して第１円筒部２の端縁に繋がり、外周面にシール体７が加硫接着された第２円筒部３、及び第２円筒部３の端縁に繋がる円盤部６からなり、円盤部６（カップ状本体部１Ａの底部）には通孔６Ａが形成される。
よって、実施の形態２のカップ状本体部１Ａには、実施の形態１の図２に示す段部Ｃが無く、カップ状本体部１Ａの加工工程を簡単化できるため、保護カバー１の製造コストを低減できる。 Embodiment 2 FIG.
The bearing device 11 and the protective cover 1 according to the second embodiment of the present invention shown in the partial longitudinal sectional view of FIG. 4, and the protective cover according to the second embodiment of the present invention shown in an enlarged longitudinal sectional perspective view of a main part of FIG. In FIG. 1, the same reference numerals as those in FIGS. 1 and 2 of the first embodiment denote the same or corresponding parts, and a description of the same parts will be omitted.
The cup-shaped main body 1A of the protective cover 1 according to the second embodiment has a diameter smaller than that of the first cylindrical portion 2 and the first cylindrical portion 2 that is press-fitted into the outer ring 13, and is connected to the edge of the first cylindrical portion 2. It comprises a second cylindrical portion 3 having a sealing member 7 vulcanized and bonded to the outer peripheral surface, and a disk portion 6 connected to an edge of the second cylindrical portion 3, and the disk portion 6 (the bottom portion of the cup-shaped main body portion 1A) passes through. A hole 6A is formed.
Therefore, the cup-shaped main body 1A of the second embodiment does not have the step C shown in FIG. 2 of the first embodiment, and the processing steps of the cup-shaped main body 1A can be simplified. Can be reduced.

実施の形態１及び２のような保護カバー１の構成によれば、インサート成形品である保護カバー１の合成樹脂製のセンサホルダ部８が、インサート品であるカップ状本体部１Ａの底部の通孔６Ａを通って径方向外方へ延びる回り込み部８Ｂを有するので、カップ状本体部１Ａとセンサホルダ部８とが機械的に結合する。
よって、カップ状本体部１Ａとセンサホルダ部８との固着力が大きくなるため、カップ状本体部１Ａとセンサホルダ部８との結合の高い信頼性を長期間にわたって確保できる。 According to the configuration of the protective cover 1 as in the first and second embodiments, the synthetic resin sensor holder portion 8 of the protective cover 1 which is an insert molded product passes through the bottom of the cup-shaped main body portion 1A which is an insert product. Since it has the wraparound portion 8B extending radially outward through the hole 6A, the cup-shaped main body 1A and the sensor holder 8 are mechanically coupled.
Therefore, since the fixing force between the cup-shaped main body 1A and the sensor holder 8 is increased, high reliability of the connection between the cup-shaped main body 1A and the sensor holder 8 can be ensured for a long period of time.

なお、以上のような保護カバー１におけるカップ状本体部１Ａとセンサホルダ部８とを機械的に結合させる技術は、インサート成形によりインサート品と合成樹脂とを一体化した保護カバー１以外のインサート成形品にも適用できる。
すなわちインサート品の合成樹脂との接合面に通孔を形成し、前記合成樹脂に、前記接合面から前記通孔を通って径方向外方へ延びる回り込み部を形成すればよい。 The technique of mechanically coupling the cup-shaped main body portion 1A and the sensor holder portion 8 in the protective cover 1 described above is based on insert molding other than the protective cover 1 in which an insert product and a synthetic resin are integrated by insert molding. Applicable to products.
That is, a through-hole may be formed in the surface of the insert product that is joined to the synthetic resin, and a wraparound portion extending radially outward from the joint surface through the through-hole may be formed in the synthetic resin.

実施の形態３．
図６の部分縦断面図に示す本発明の実施の形態３に係る軸受装置１１及び保護カバー１、並びに図７の要部拡大縦断面斜視図及び図８の部分縦断面図に示す本発明の実施の形態３に係る保護カバー１において、実施の形態１の図１及び図２と同一符号は同一又は相当部分を示しているので、同一部分についての説明は省略する。
実施の形態３の保護カバー１のカップ状本体部１Ａは、その第３円筒部５の外周面には、外方からパンチ等を押圧することにより凹部９，９，…が形成されており、実施の形態１のような通孔６Ａは無い。
センサホルダ部８は、ナット１０を保持する基部８Ａ、及び円盤部６及び第３円筒部５により形成される段部Ｃを被う段部被い部８Ｃを有し、センサホルダ部８の合成樹脂が凹部９，９，…内に入り込んでいるので、カップ状本体部１Ａと一体化される。 Embodiment 3 FIG.
The bearing device 11 and the protective cover 1 according to the third embodiment of the present invention shown in the partial longitudinal sectional view of FIG. 6 and the main portion enlarged longitudinal sectional perspective view of FIG. 7 and the partial longitudinal sectional view of FIG. In the protective cover 1 according to the third embodiment, the same reference numerals as those in FIGS. 1 and 2 of the first embodiment denote the same or corresponding parts, and a description of the same parts will be omitted.
The cup-shaped main body 1A of the protective cover 1 according to the third embodiment has recesses 9, 9,... Formed on the outer peripheral surface of the third cylindrical portion 5 by pressing a punch or the like from the outside. There is no through-hole 6A as in the first embodiment.
The sensor holder part 8 has a base part 8A that holds the nut 10 and a step covering part 8C that covers a step part C formed by the disk part 6 and the third cylindrical part 5, and the sensor holder part 8 is synthesized. Since the resin has entered the recesses 9, 9,..., The resin is integrated with the cup-shaped main body 1A.

次に、センサホルダ部８を有する保護カバー１の製造方法について説明する。
＜プレス加工工程＞
保護カバー１を構成するカップ状本体部１Ａを、例えばオーステナイト系ステンレス鋼製の板材からプレス加工により成形するプレス加工工程を行う。 Next, a method for manufacturing the protective cover 1 having the sensor holder 8 will be described.
<Pressing process>
A press working step of forming the cup-shaped main body 1A constituting the protective cover 1 from a plate made of, for example, austenitic stainless steel by press working is performed.

＜加硫接着工程＞
前記プレス加工工程で成形されたカップ状本体部１Ａの第２円筒部３の外周面にシール体７を加硫接着する加硫接着工程を行う。
なお、カップ状本体部１Ａの合成樹脂との接合面に熱硬化性接着剤を塗布する接着剤塗布工程を行ってもよく、それによりカップ状本体部１Ａと合成樹脂の結合強度が向上する。 <Vulcanization bonding process>
A vulcanization bonding step of vulcanizing and bonding the seal body 7 to the outer peripheral surface of the second cylindrical portion 3 of the cup-shaped main body 1A formed in the press working step is performed.
Note that an adhesive application step of applying a thermosetting adhesive to the joint surface of the cup-shaped main body 1A with the synthetic resin may be performed, thereby improving the bonding strength between the cup-shaped main body 1A and the synthetic resin.

＜射出成形工程＞
図９の縦断面図に示す射出成形金型において、先ず、固定型１８の支持軸２１にインサート品であるナット１０をセットする。
また、前記プレス加工工程で成形され、前記加硫接着工程を経た、インサート品であるカップ状本体部１Ａを可動型１９にセットする。
次に、射出成形機に取り付けられた固定型１８及び可動型１９を型締めした状態で、溶融したプラスチックをスプルーから注入してゲート２０から固定型１８及び可動型１９間のキャビティ内に充填する。
次に、溶融したプラスチックを冷却・固化させた後、可動型１９を開いてインサート成形品を取り出す。
このような射出成形工程を経た保護カバー１（図６〜図８参照）は、ナット１０の周溝１０Ａに合成樹脂が入り込んでいるので、ナット１０の抜け止めがされる。また、センサホルダ部８は、カップ状本体部１Ａの段部Ｃを被う段部被い部８Ｃを有するとともに、センサホルダ部８の合成樹脂がカップ状本体部１Ａの第３円筒部５の外周面に形成された凹部９，９，…内に入り込んでいる。よって、カップ状本体部１Ａとセンサホルダ部８は機械的に結合する。 <Injection molding process>
In the injection mold shown in the vertical sectional view of FIG. 9, first, the nut 10 as an insert is set on the support shaft 21 of the fixed mold 18.
Further, the cup-shaped main body 1A, which is an insert product, which has been formed in the press working step and has undergone the vulcanization bonding step, is set on the movable mold 19.
Next, in a state where the fixed mold 18 and the movable mold 19 attached to the injection molding machine are clamped, molten plastic is injected from a sprue and filled from the gate 20 into the cavity between the fixed mold 18 and the movable mold 19. .
Next, after the molten plastic is cooled and solidified, the movable mold 19 is opened to take out the insert molded product.
In the protective cover 1 having undergone such an injection molding process (see FIGS. 6 to 8), since the synthetic resin enters the circumferential groove 10 </ b> A of the nut 10, the nut 10 is prevented from coming off. The sensor holder 8 has a step covering portion 8C that covers the step C of the cup-shaped main body 1A, and the synthetic resin of the sensor holder 8 is formed of the third cylindrical portion 5 of the cup-shaped main body 1A. .. Formed in the outer peripheral surface. Therefore, the cup-shaped main body 1A and the sensor holder 8 are mechanically connected.

なお、図６〜図８に示すように、第３円筒部５の外周面への凹部９，９，…の形成により、第３円筒部５の内周面に凸部が形成されるので、アンダーカット部があるが、図９に示す可動型１９には、前記凸部に対応する位置に縮径部Ｄ，Ｄ，…を設けているので、可動型１９へのカップ状本体部１Ａのセット、及び可動型１９からの磁気エンコーダ１の取り外しが容易になる。   In addition, as shown in FIGS. 6 to 8, by forming the concave portions 9 on the outer peripheral surface of the third cylindrical portion 5, a convex portion is formed on the inner peripheral surface of the third cylindrical portion 5. Although there is an undercut portion, the movable mold 19 shown in FIG. 9 is provided with reduced diameter portions D, D,... At positions corresponding to the convex portions. The set and the removal of the magnetic encoder 1 from the movable mold 19 are facilitated.

実施の形態３のような保護カバー１の構成によれば、インサート品であるカップ状本体部１Ａの最底部である円盤部６及び円盤部６の外周縁から軸方向に延びる第３円筒部５により形成される段部Ｃを、合成樹脂製のセンサホルダ部８が被うとともに、第３円筒部５に形成された凹部９，９，…にセンサホルダ部８が係合するので、カップ状本体部１Ａとセンサホルダ部８とが機械的に結合する。
よって、カップ状本体部１Ａとセンサホルダ部８との固着力が大きくなるため、カップ状本体部１Ａとセンサホルダ部８との結合の高い信頼性を長期間にわたって確保できる。 According to the configuration of the protective cover 1 as in the third embodiment, the disk portion 6 which is the lowest portion of the cup-shaped main body 1A which is an insert product, and the third cylindrical portion 5 which extends in the axial direction from the outer peripheral edge of the disk portion 6. Are covered by the synthetic resin sensor holder portion 8 and the sensor holder portions 8 are engaged with the concave portions 9, 9,... Formed in the third cylindrical portion 5, so that the cup shape is obtained. The main body 1A and the sensor holder 8 are mechanically connected.
Therefore, since the fixing force between the cup-shaped main body 1A and the sensor holder 8 is increased, high reliability of the connection between the cup-shaped main body 1A and the sensor holder 8 can be ensured for a long period of time.

以上の説明においては、カップ状本体部１Ａの小径の側部である第３円筒部５の外周面に凹部９，９，…を形成する場合を示したが、第３円筒部５の外周面に凸部を形成してもよく、その場合には、図９の可動型１９に縮径部Ｄ，Ｄ，…を形成する必要がなくなる。
なお、以上のような保護カバー１におけるカップ状本体部１Ａとセンサホルダ部８とを機械的に結合させる技術は、インサート成形によりインサート品と合成樹脂とを一体化した保護カバー１以外のインサート成形品にも適用できる。
すなわちインサート品をカップ状とし、前記カップ状の底部に、前記カップ状の側部よりも小径の側部を有して最底部に繋がる段部を形成するとともに、前記小径の側部に凹部又は凸部を形成し、前記合成樹脂が、前記段部（前記最底部及び前記小径の側部）を被う部分を有するようにすればよい。 In the above description, the case where the concave portions 9, 9,... Are formed on the outer peripheral surface of the third cylindrical portion 5 which is the small-diameter side portion of the cup-shaped main body portion 1A has been described. May be formed, and in that case, it is not necessary to form the reduced diameter portions D, D,... In the movable mold 19 of FIG.
The technique of mechanically coupling the cup-shaped main body portion 1A and the sensor holder portion 8 in the protective cover 1 described above is based on insert molding other than the protective cover 1 in which an insert product and a synthetic resin are integrated by insert molding. Applicable to products.
That is, the insert product is cup-shaped, and at the cup-shaped bottom, a step having a side portion smaller in diameter than the cup-shaped side portion and connected to the bottom is formed, and a concave portion or A protrusion may be formed so that the synthetic resin has a portion covering the step (the bottom portion and the small-diameter side portion).

１ 保護カバー（インサート成形品）
１Ａ カップ状本体部（インサート品）
２ 第１円筒部
３ 第２円筒部
４ 円環部
５ 第３円筒部（小径の側部）
６ 円盤部（最底部）
６Ａ 通孔
７ シール体
８ センサホルダ部（合成樹脂）
８Ａ 基部
８Ｂ 回り込み部
８Ｃ 段部被い部
９ 凹部
１０ ナット（インサート品）
１０Ａ 周溝
１１ 軸受装置
１２ 内輪
１２Ａ 内輪軌道面
１３ 外輪
１３Ａ 外輪駆動面
１４ 転動体
１５ シール部材
１６ 磁気エンコーダ
１７ 支持部材
１８ 固定型
１９ 可動型
２０ ゲート
２１ 支持軸
Ａ 磁気センサ
Ｂ 取付ボルト
Ｃ 段部
Ｄ 縮径部
Ｓ シール体 1 Protective cover (insert molded product)
1A cup-shaped body (insert product)
2 First cylindrical portion 3 Second cylindrical portion 4 Annular portion 5 Third cylindrical portion (small diameter side portion)
6 Disk (bottom)
6A Through hole 7 Seal 8 Sensor holder (synthetic resin)
8A Base 8B Wrap-around part 8C Step covering part 9 Recess 10 Nut (insert product)
Reference Signs List 10A Peripheral groove 11 Bearing device 12 Inner ring 12A Inner ring raceway surface 13 Outer ring 13A Outer ring drive surface 14 Rolling member 15 Seal member 16 Magnetic encoder 17 Support member 18 Fixed type 19 Movable type 20 Gate 21 Support shaft A Magnetic sensor B Mounting bolt C Step D Reduced diameter part S Seal body

Claims (5)

外周面に内輪軌道面が形成された内輪、及び内周面に外輪軌道面が形成された外輪、並びに、前記内輪軌道面及び前記外輪軌道面間を転動する転動体を有する軸受、前記軸受の軸方向の一端部に位置して前記内輪に固定された、Ｎ極とＳ極を一定間隔で周方向に交互に並べてなる磁気エンコーダ、並びに、前記磁気エンコーダの磁極に対向して前記磁気エンコーダの回転を検知するための磁気センサを備えた軸受装置に用いられる保護カバーの製造方法であって、
前記保護カバーが、前記軸受の軸方向の一端部に位置して前記外輪に圧入される、非磁性体の鋼板をカップ状に成形したカップ状本体部、及び、前記磁気センサを取り付けるためのナットを保持しながら前記カップ状本体部に一体接合された合成樹脂製のセンサホルダ部を有するものであり、
前記カップ状本体部は、その底部に通孔が形成されたものであり、前記カップ状本体部をプレス加工により成形するプレス加工工程と、
前記ナット及び前記カップ状本体部をインサート品として金型内にセットし、型締めした後、溶融したプラスチックをキャビティ内に充填することにより、前記ナット及び前記カップ状本体部と一体化された前記センサホルダ部に、前記通孔を通って前記底部の内面側で径方向外方へ延びる回り込み部を形成するように射出成形を行う射出成形工程と、
を含むことを特徴とするセンサホルダ部を有する保護カバーの製造方法。 An inner ring having an inner raceway surface formed on an outer peripheral surface, an outer ring having an outer raceway surface formed on an inner peripheral surface, and a bearing having a rolling element rolling between the inner raceway surface and the outer raceway surface; A magnetic encoder having N poles and S poles alternately arranged in the circumferential direction at regular intervals and fixed to the inner ring at one axial end, and the magnetic encoder facing the magnetic poles of the magnetic encoder A method for manufacturing a protective cover used in a bearing device having a magnetic sensor for detecting rotation of
The protection cover is located at one end in the axial direction of the bearing and is press-fitted into the outer ring, a cup-shaped main body formed by molding a nonmagnetic steel plate into a cup shape, and a nut for attaching the magnetic sensor. Having a sensor holder made of synthetic resin integrally joined to the cup-shaped main body while holding
The cup-shaped body has a bottom formed with a through-hole, and a pressing step of forming the cup-shaped body by pressing.
The nut and the cup-shaped main body are set as inserts in a mold, and after clamping, the molten plastic is filled in the cavity, thereby integrating the nut and the cup-shaped main body with the nut. Injection molding step of performing injection molding on the sensor holder portion so as to form a wraparound portion extending radially outward on the inner surface side of the bottom portion through the through hole,
A method for manufacturing a protective cover having a sensor holder portion, comprising: 前記カップ状本体部の前記通孔の周囲に無端状のシール体を加硫接着する加硫接着工程、及び前記周囲に熱硬化性接着剤を塗布する接着剤塗布工程の少なくともどちらかの工程を有する請求項１記載のセンサホルダ部を有する保護カバーの製造方法。 At least one of a vulcanization bonding step of vulcanizing and bonding an endless seal body around the through hole of the cup-shaped main body, and an adhesive application step of applying a thermosetting adhesive to the periphery. A method for manufacturing a protective cover having a sensor holder according to claim 1 . 前記カップ状本体部の底部が、最底部である円盤部、前記円盤部の外周縁から軸方向に延びる円筒部、前記円筒部の軸方向端縁から径方向外方に延びる円環部を有するものであり、前記センサホルダ部が前記円盤部及び前記円筒部を被う部分を有する請求項１記載のセンサホルダ部を有する保護カバーの製造方法。 The bottom of the cup-shaped main body has a disk portion that is the bottommost portion, a cylindrical portion extending in the axial direction from the outer peripheral edge of the disk portion, and a ring portion extending radially outward from the axial end edge of the cylindrical portion. It is intended method of protective cover having a sensor holder of claim 1, wherein the sensor holder portion has a portion that covers the disk portion and the cylindrical portion. 外周面に内輪軌道面が形成された内輪、及び内周面に外輪軌道面が形成された外輪、並びに、前記内輪軌道面及び前記外輪軌道面間を転動する転動体を有する軸受、前記軸受の軸方向の一端部に位置して前記内輪に固定された、Ｎ極とＳ極を一定間隔で周方向に交互に並べてなる磁気エンコーダ、並びに、前記磁気エンコーダの磁極に対向して前記磁気エンコーダの回転を検知するための磁気センサを備えた軸受装置に用いられる保護カバーの製造方法であって、
前記保護カバーが、前記軸受の軸方向の一端部に位置して前記外輪に圧入される、非磁性体の鋼板をカップ状に成形したカップ状本体部、及び、前記磁気センサを取り付けるためのナットを保持しながら前記カップ状本体部に一体接合された合成樹脂製のセンサホルダ部を有するものであり、
前記カップ状本体部は、その底部が、最底部である円盤部、前記円盤部の外周縁から軸方向に延びる円筒部、前記円筒部の軸方向端縁から径方向外方に延びる円環部を有するものであるとともに、前記円筒部には凹部又は凸部が形成されたものであり、前記カップ状本体部をプレス加工により成形するプレス加工工程と、
前記ナット及び前記カップ状本体部をインサート品として金型内にセットし、型締めした後、溶融したプラスチックをキャビティ内に充填することにより、前記ナット及び前記カップ状本体部と一体化された前記センサホルダ部に、前記円盤部及び前記円筒部により形成される段部を被う段部被い部を形成するように射出成形を行う射出成形工程と、
を含むことを特徴とするセンサホルダ部を有する保護カバーの製造方法。 An inner ring having an inner raceway surface formed on an outer peripheral surface, an outer ring having an outer raceway surface formed on an inner peripheral surface, and a bearing having a rolling element rolling between the inner raceway surface and the outer raceway surface; A magnetic encoder which is fixed to the inner ring at one end in the axial direction and has N poles and S poles alternately arranged in the circumferential direction at regular intervals, and the magnetic encoder facing the magnetic poles of the magnetic encoder A method for manufacturing a protective cover used in a bearing device having a magnetic sensor for detecting rotation of
The protective cover is located at one end in the axial direction of the bearing and is press-fitted into the outer ring, a cup-shaped main body formed by molding a nonmagnetic steel plate into a cup shape, and a nut for attaching the magnetic sensor Having a sensor holder made of synthetic resin integrally joined to the cup-shaped body while holding
The cup-shaped body portion has a bottom portion, a disk portion being a bottommost portion, a cylindrical portion extending in an axial direction from an outer peripheral edge of the disk portion, and a ring portion extending radially outward from an axial end edge of the cylindrical portion. And a pressing step of forming the cup-shaped main body by pressing, wherein the cylindrical portion has a concave portion or a convex portion formed therein,
The nut and the cup-shaped main body are set as inserts in a mold, and after clamping, the molten plastic is filled into the cavity, thereby integrating the nut and the cup-shaped main body with the nut. Injection molding step of performing injection molding to form a step covering portion covering a step formed by the disk portion and the cylindrical portion on the sensor holder portion,
A method for manufacturing a protective cover having a sensor holder portion, comprising: 外周面に内輪軌道面が形成された内輪、及び内周面に外輪軌道面が形成された外輪、並びに、前記内輪軌道面及び前記外輪軌道面間を転動する転動体を有する軸受、前記軸受の軸方向の一端部に位置して前記内輪に固定された、Ｎ極とＳ極を一定間隔で周方向に交互に並べてなる磁気エンコーダ、並びに、前記磁気エンコーダの磁極に対向して前記磁気エンコーダの回転を検知するための磁気センサを備えた軸受装置の製造方法であって、
請求項１〜４の何れか１項に記載のセンサホルダ部を有する保護カバーの製造方法により製造された保護カバーを、前記外輪に圧入する工程を含む、保護カバーを備えた軸受装置の製造方法。
An inner ring having an inner raceway surface formed on an outer peripheral surface, an outer ring having an outer raceway surface formed on an inner peripheral surface, and a bearing having a rolling element rolling between the inner raceway surface and the outer raceway surface; A magnetic encoder having N poles and S poles alternately arranged in the circumferential direction at regular intervals and fixed to the inner ring at one axial end, and the magnetic encoder facing the magnetic poles of the magnetic encoder A method of manufacturing a bearing device including a magnetic sensor for detecting rotation of a bearing,
The protective cover manufactured by the manufacturing method of the protective cover having a sensor holder according to claim 1, comprising the step of press-fitted into the outer ring, the manufacturing method of the bearing device with a protective cover .
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