JP6743658B2 - Bearing cap and rolling bearing unit - Google Patents

Bearing cap and rolling bearing unit Download PDF

Info

Publication number
JP6743658B2
JP6743658B2 JP2016216868A JP2016216868A JP6743658B2 JP 6743658 B2 JP6743658 B2 JP 6743658B2 JP 2016216868 A JP2016216868 A JP 2016216868A JP 2016216868 A JP2016216868 A JP 2016216868A JP 6743658 B2 JP6743658 B2 JP 6743658B2
Authority
JP
Japan
Prior art keywords
resin
ring
bearing cap
axial
bottom plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2016216868A
Other languages
Japanese (ja)
Other versions
JP2018076875A5 (en
JP2018076875A (en
Inventor
良雄 神谷
良雄 神谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NSK Ltd filed Critical NSK Ltd
Priority to JP2016216868A priority Critical patent/JP6743658B2/en
Priority to CN201721437724.8U priority patent/CN207634538U/en
Priority to DE202017106726.2U priority patent/DE202017106726U1/en
Publication of JP2018076875A publication Critical patent/JP2018076875A/en
Publication of JP2018076875A5 publication Critical patent/JP2018076875A5/ja
Application granted granted Critical
Publication of JP6743658B2 publication Critical patent/JP6743658B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing Of Bearings (AREA)

Description

本発明は、転がり軸受ユニットを構成する外輪の軸方向端部開口部に取り付けられる軸受キャップの改良に関する。 The present invention relates to an improvement of a bearing cap attached to an axial end opening of an outer ring that constitutes a rolling bearing unit.

自動車の車輪を懸架装置に対して回転自在に支持する為の車輪支持用転がり軸受ユニットとして、外輪の軸方向内端開口部に取り付けられた軸受キャップを備えたものが各種知られている。 As a wheel supporting rolling bearing unit for rotatably supporting a wheel of an automobile with respect to a suspension device, various ones having a bearing cap attached to an axially inner end opening of an outer wheel are known.

図９は、この様な軸受キャップを備えた車輪支持用転がり軸受ユニットの１例として、特許文献１に記載されたものを示している。 FIG. 9 shows an example of a rolling bearing unit for wheel support provided with such a bearing cap, which is described in Patent Document 1.

図９に示した車輪支持用転がり軸受ユニット１の場合、使用時に懸架装置に支持固定された状態で回転しない外輪２と、使用時に車輪を支持固定した状態でこの車輪と共に回転するハブ３とのうち、外輪２の軸方向内端開口部に取り付けられた軸受キャップ６は、金属板製の金属環２１と、合成樹脂製のキャップ本体２２とを備える。尚、本明細書で、軸方向に関して「内」とは、車両への組み付け状態で車両の幅方向中央側となる側（例えば図１、２、９に於ける右側）を言い、同じく「外」とは、車両の幅方向外側となる側（例えば図１、２、９に於ける左側）を言う。 In the case of the wheel supporting rolling bearing unit 1 shown in FIG. 9, an outer ring 2 that does not rotate while being supported and fixed to a suspension device during use, and a hub 3 that rotates together with the wheel while being supported and fixed at the time of use. The bearing cap 6 attached to the axially inner end opening of the outer ring 2 includes a metal ring 21 made of a metal plate and a cap body 22 made of synthetic resin. In this specification, "inside" with respect to the axial direction means a side that is a center side in the width direction of the vehicle when assembled to the vehicle (for example, the right side in Figs. 1, 2, and 9), and also "outside". "Means the side on the outside in the width direction of the vehicle (for example, the left side in FIGS. 1, 2, and 9).

金属環２１は、嵌合筒部２３と、この嵌合筒部２３の軸方向内端部から径方向外方に折れ曲がる状態で設けられた外向鍔部２４と、これら嵌合筒部２３と外向鍔部２４との連続部に存在する断面円弧形の屈曲部２５とを有する。 The metal ring 21 includes a fitting cylinder portion 23, an outward flange portion 24 provided in a state of being bent outward in the radial direction from an axially inner end portion of the fitting cylinder portion 23, and the fitting cylinder portion 23 and the outward direction. It has a bent portion 25 having an arc-shaped cross section that is present in a continuous portion with the collar portion 24.

キャップ本体２２は、樹脂筒部２８と、樹脂底板部２９とを有する。樹脂筒部２８は、外向鍔部２４と屈曲部２５とを包埋すると共に、嵌合筒部２３の外周面の軸方向内端部を覆っている。樹脂底板部２９は、樹脂筒部２８の軸方向内端部の内周部に、外周部を結合されている。 The cap body 22 has a resin tube portion 28 and a resin bottom plate portion 29. The resin tubular portion 28 embeds the outward flange portion 24 and the bent portion 25, and covers the axially inner end portion of the outer peripheral surface of the fitting tubular portion 23. The resin bottom plate portion 29 has an outer peripheral portion joined to the inner peripheral portion of the axially inner end portion of the resin tubular portion 28.

この様な構成を有する軸受キャップ６は、金属環２１を構成する嵌合筒部２３の軸方向外半部を外輪２の軸方向内端部内周面に締り嵌めで内嵌する事により、この外輪２の軸方向内端部に取り付けられている。 In the bearing cap 6 having such a configuration, the axial outer half of the fitting tubular portion 23 forming the metal ring 21 is internally fitted by tight fitting on the inner circumferential surface of the axial inner end of the outer ring 2. It is attached to the axially inner end of the outer ring 2.

尚、図示の例では、ハブ３の軸方向内端部に支持固定されたエンコーダ７の被検出部に対して、樹脂底板部２９に形成された挿入孔３４内に挿入されたセンサユニット８の検出部を軸方向に対向させる事により、車輪の回転速度を検出可能としている。 In the illustrated example, the sensor unit 8 inserted into the insertion hole 34 formed in the resin bottom plate portion 29 is attached to the detected portion of the encoder 7 supported and fixed to the axially inner end portion of the hub 3. The rotation speed of the wheels can be detected by making the detection units face each other in the axial direction.

上述の様な軸受キャップ６のうち、金属環２１を構成する嵌合筒部２３の軸方向外半部を、外輪２の軸方向内端部内周面に締り嵌めで内嵌する際には、キャップ本体２２の軸方向内端面の径方向外端部に、軸方向の押圧力Ｆを加える。そして、この押圧力Ｆを、金属環２１を構成する外向鍔部２４に伝える事により、この金属環２１を構成する嵌合筒部２３の軸方向外半部を、外輪２の軸方向内端部内周面に軸方向内側から圧入する。 In the bearing cap 6 as described above, when the axial outer half portion of the fitting tubular portion 23 forming the metal ring 21 is internally fitted to the inner circumferential surface of the axial inner end portion of the outer ring 2 by an interference fit, An axial pressing force F is applied to the radially outer end portion of the axially inner end surface of the cap body 22. Then, by transmitting the pressing force F to the outward flange portion 24 forming the metal ring 21, the axial outer half portion of the fitting tubular portion 23 forming the metal ring 21 is moved to the axial inner end of the outer ring 2. It is pressed into the inner surface of the part from the inside in the axial direction.

ここで、キャップ本体２２の軸方向内端面の径方向外端部に加えた押圧力Ｆを、金属環２１を構成する外向鍔部２４に効率良く伝えられる様にする為には、この外向鍔部２４の径方向幅寸法を極力大きくする事が好ましい。 Here, in order to efficiently transmit the pressing force F applied to the radially outer end portion of the axially inner end surface of the cap main body 22 to the outward brim portion 24 forming the metal ring 21, the outward brim is provided. It is preferable to maximize the radial width of the portion 24.

しかしながら、外向鍔部２４の径方向幅寸法を極力大きくする為に、この外向鍔部２４の外径寸法を大きくして、この外向鍔部２４の外径寸法を樹脂筒部２８の外径寸法に近づけると、その分、この樹脂筒部２８のうちで外向鍔部２４の径方向外側に位置する部分の径方向の肉厚が小さくなる。この為、キャップ本体２２の射出成形を行う際に、ゲートから樹脂底板部２９の成形用空間に送り込まれた溶融樹脂は、樹脂筒部２８の成形用空間に送り込まれた後、図９の矢印Ｘ1で示す様に、外向鍔部２４の径方向外側に位置する部分を通じて、嵌合筒部２３の外径側の空間に送り込まれにくくなる。この結果、キャップ本体２２の射出成形の効率が低下すると言った問題を生じる。この様な問題は、金属環を構成する嵌合筒部の外周面を覆う樹脂筒部の体積が多くなる構造に関して、特に顕著になる。 However, in order to maximize the radial width of the outward flange portion 24, the outer diameter dimension of the outward flange portion 24 is increased so that the outer diameter dimension of the outward flange portion 24 becomes the outer diameter dimension of the resin tubular portion 28. When approaching to, the radial thickness of the portion of the resin tubular portion 28 located outside the outward flange portion 24 in the radial direction is correspondingly reduced. Therefore, when injection molding of the cap body 22 is performed, the molten resin fed from the gate into the molding space of the resin bottom plate portion 29 is fed into the molding space of the resin tubular portion 28, and then the arrow in FIG. As indicated by X 1, it is difficult for the outer flange portion 24 to be fed into the space on the outer diameter side of the fitting tubular portion 23 through the portion located on the radially outer side. As a result, there arises a problem that the efficiency of the injection molding of the cap body 22 decreases. Such a problem becomes particularly remarkable in the structure in which the volume of the resin cylindrical portion covering the outer peripheral surface of the fitting cylindrical portion forming the metal ring is large.

尚、特許文献２には、軸受キャップの金属環を構成する嵌合筒部の軸方向内端部に、径方向内側に折れ曲がる状態で内向鍔部を設けた構造が記載されている。この様な構造の場合には、内向鍔部の径方向幅寸法を大きくする（内径寸法を小さくする）場合でも、上述の様な問題が生じる事はないが、内向鍔部の存在によって、樹脂底板部に対するセンサユニットの挿入孔の形成位置が制約を受ける等の、別の問題を生じる。 Patent Document 2 describes a structure in which an inward flange portion is provided at an axially inner end portion of a fitting cylindrical portion forming a metal ring of a bearing cap so as to be bent inward in a radial direction. In the case of such a structure, even if the radial width of the inward flange is increased (the inner diameter is decreased), the above-mentioned problems do not occur, but the presence of the inward flange causes the resin Another problem arises such that the formation position of the insertion hole of the sensor unit with respect to the bottom plate is restricted.

特開２００５−９５２７号公報JP-A-2005-9527 特開２００８−８３７５号公報JP, 2008-8375, A

本発明は、上述の様な事情に鑑み、金属環を構成する外向鍔部の外径寸法を、キャップ本体を構成する樹脂筒部の外径寸法に近づけて大きくした場合でも、キャップ本体の射出成形を効率良く行える構造を実現すべく発明したものである。 In view of the above-mentioned circumstances, the present invention provides an injection of a cap body even when the outer diameter dimension of the outward flange portion that constitutes the metal ring is made close to the outer diameter dimension of the resin tube portion that constitutes the cap body. It was invented to realize a structure that enables efficient molding.

本発明の軸受キャップは、金属板製の金属環と、合成樹脂製のキャップ本体とを備える。
このうちの金属環は、転がり軸受ユニットを構成する外径側軌道輪の軸方向片端部に直接又は他の部材を介して内嵌される嵌合筒部と、この嵌合筒部の軸方向片端部から径方向外方に折れ曲がる状態で設けられた外向鍔部と、前記嵌合筒部と前記外向鍔部との連続部に存在する断面円弧形の屈曲部とを有する。
又、前記キャップ本体は、前記金属環のうちで少なくとも前記外向鍔部及び前記屈曲部を包埋する樹脂筒部と、この樹脂筒部の軸方向片端部の内周部に外周部を結合された樹脂底板部とを有している。
特に、本発明の軸受キャップの場合には、前記屈曲部に、軸方向他側に向かう程径方向外側に向かう方向に傾斜した透孔が設けられている。これと共に、この透孔内に、前記合成樹脂の一部が入り込んでいる。
別な言い方をすれば、本発明の軸受キャップの場合には、前記金属環の中心軸を含む仮想平面内で、前記透孔の中心軸が、軸方向他側に向かう程径方向外側に向かう方向に傾斜している。
尚、前記仮想平面内で、前記透孔の内周面は、この透孔の中心軸に対して平行になっていても良いし、この透孔の中心軸に対して非平行になっていても良い（例えば、この透孔の中心軸に沿って軸方向他側且つ径方向外側に向かう程、この透孔の内径が小さくなる方向に傾斜していても良い）。 The bearing cap of the present invention includes a metal ring made of a metal plate and a cap body made of synthetic resin.
Among these, the metal ring is a fitting cylinder part that is fitted in an axial direction one end of the outer diameter side race ring that constitutes the rolling bearing unit directly or through another member, and the fitting cylinder part in the axial direction. It has an outward flange portion that is bent outward in the radial direction from one end portion, and a bent portion having an arc-shaped cross section that is present in a continuous portion between the fitting tubular portion and the outward flange portion.
Further, the cap main body has a resin cylinder part that embeds at least the outward flange part and the bent part in the metal ring, and an outer peripheral part is coupled to an inner peripheral part of one end part in the axial direction of the resin cylinder part. And a resin bottom plate portion.
Particularly, in the case of the bearing cap of the present invention, the bent portion is provided with a through hole that is inclined in a direction outward in the radial direction toward the other side in the axial direction. At the same time, a part of the synthetic resin has entered the through hole.
In other words, in the case of the bearing cap of the present invention, in the virtual plane including the central axis of the metal ring, the central axis of the through hole goes radially outward toward the other side in the axial direction. Inclined in the direction.
In the virtual plane, the inner peripheral surface of the through hole may be parallel to the central axis of the through hole, or may be non-parallel to the central axis of the through hole. Alternatively, for example, the inner diameter of the through hole may become smaller toward the other side in the axial direction and the radially outer side along the central axis of the through hole.

又、本発明を実施する場合に、前記透孔（又はこの透孔となる素孔）は、素材となる金属板に曲げ加工を施す事によって前記屈曲部を形成した後の段階で形成する事もできるし、或いは、同じく前記屈曲部を形成する前の段階で形成する事もできる。 Further, in the case of carrying out the present invention, the through hole (or the elemental hole to be the through hole) is formed at a stage after the bent portion is formed by bending a metal plate as a raw material. Alternatively, it can also be formed before the formation of the bent portion.

又、本発明を実施する場合には、前記樹脂底板部に、センサユニットを取り付け可能な、センサ取付部が設けられた構成を採用する事ができる。 Further, in the case of carrying out the present invention, it is possible to adopt a configuration in which a sensor mounting portion capable of mounting a sensor unit is provided on the resin bottom plate portion.

又、本発明を実施する場合には、例えば、前記樹脂底板部の軸方向他側面のうち、円周方向に関して前記透孔と同位相となる箇所に、放射方向に伸長するリブが設けられている構成を採用する事ができる。
この場合には、例えば、前記リブの径方向外端部が前記樹脂筒部の内周面に接続されている構成や、前記リブの径方向外端部と前記樹脂筒部の内周面とが径方向に離隔している構成を採用する事ができる。 Further, in the case of carrying out the present invention, for example, a rib extending in the radial direction is provided on a portion of the other side surface in the axial direction of the resin bottom plate portion in the same phase as the through hole in the circumferential direction. It is possible to adopt the configuration that has.
In this case, for example, the radial outer end of the rib is connected to the inner peripheral surface of the resin tubular portion, or the radial outer end of the rib and the inner peripheral surface of the resin tubular portion. It is possible to adopt a configuration in which the are separated in the radial direction.

本発明を実施する場合には、例えば、前記樹脂底板部の径方向外端部のうち、円周方向に関して前記透孔と同位相となる箇所に、径方向内側に隣接する部分に比べて軸方向の厚さ寸法が小さくなった狭窄部が設けられている構成を採用する事ができる。
この場合には、例えば、前記リブの径方向外端部と前記樹脂筒部の内周面とが径方向に離隔している構成を採用すると共に、前記樹脂底板部の径方向外端部のうち、前記リブの径方向外側に隣接する部分に前記狭窄部が設けられている構成を採用する事ができる。
又は、例えば、前記樹脂底板部の軸方向片側面と軸方向他側面とのうちの少なくとも一方の軸方向側面の径方向外端部のうち、円周方向に関して前記透孔と同位相となる箇所に、軸方向に凹入する凹部が設けられていると共に、前記樹脂底板部の径方向外端部のうち、この凹部に対応する部分が前記狭窄部になっている構成を採用する事ができる。 When carrying out the present invention, for example, in the radially outer end portion of the resin bottom plate portion, at a position in the same phase as the through hole in the circumferential direction, the shaft is compared with the portion adjacent to the radially inner side. A configuration in which a narrowed portion having a reduced thickness in the direction is provided can be adopted.
In this case, for example, while adopting a configuration in which the radial outer end portion of the rib and the inner peripheral surface of the resin cylindrical portion are separated in the radial direction, the radial outer end portion of the resin bottom plate portion Of these, a configuration in which the narrowed portion is provided in a portion adjacent to the radially outer side of the rib can be adopted.
Or, for example, in the radial outer end portion of at least one of the axial side surface and the axial other side surface of the resin bottom plate portion, a portion having the same phase as the through hole in the circumferential direction. It is possible to adopt a configuration in which a recessed portion that is recessed in the axial direction is provided, and a portion corresponding to this recessed portion of the radial outer end portion of the resin bottom plate portion is the narrowed portion. ..

本発明の転がり軸受ユニットは、内周面に外輪軌道を有し、使用時にも回転しない外径側軌道輪と、外周面に内輪軌道を有し、使用時に回転する内径側軌道輪と、前記外輪軌道と前記内輪軌道との間に転動自在に設けられた複数個の転動体と、前記外径側軌道輪の軸方向片端開口部に取り付けられた軸受キャップとを備える。
特に、本発明の転がり軸受ユニットの場合には、前記軸受キャップが本発明の軸受キャップである。 The rolling bearing unit of the present invention has an outer ring raceway on the inner peripheral surface, an outer diameter side raceway ring that does not rotate during use, an inner ring raceway on the outer peripheral surface, and an inner diameter side raceway ring that rotates during use, A plurality of rolling elements rotatably provided between the outer ring raceway and the inner ring raceway, and a bearing cap attached to one axial end opening of the outer diameter side race ring are provided.
Particularly, in the case of the rolling bearing unit of the present invention, the bearing cap is the bearing cap of the present invention.

本発明の転がり軸受ユニットを実施する場合には、追加的に、前記内径側軌道輪に支持固定され、自身の被検出部の特性を円周方向に関して交互に変化させたエンコーダと、このエンコーダの被検出部に自身の検出部を対向させた状態で、前記軸受キャップを構成する樹脂底板部に支持され、前記被検出部のうちで自身の検出部を対向させた部分の特性に応じて出力を変化させるセンサユニットとを備えた構成を採用する事ができる。 In the case of implementing the rolling bearing unit of the present invention, additionally, an encoder which is supported and fixed to the inner diameter side bearing ring and which alternately changes the characteristics of its detected portion in the circumferential direction, The detector is supported by the resin bottom plate portion that constitutes the bearing cap in a state where the detection unit faces the detection unit, and is output according to the characteristics of the portion of the detection unit where the detection unit faces. It is possible to adopt a configuration including a sensor unit that changes the.

上述の様な構成を有する本発明の軸受キャップの場合には、金属環を構成する外向鍔部の外径寸法を、キャップ本体を構成する樹脂筒部の外径寸法に近づけて大きくした場合でも、キャップ本体の射出成形を効率良く行える。 In the case of the bearing cap of the present invention having the above-mentioned configuration, even when the outer diameter dimension of the outward flange portion forming the metal ring is made close to the outer diameter dimension of the resin tubular portion forming the cap body, The injection molding of the cap body can be performed efficiently.

本発明の実施の形態の第１例に関する、車輪支持用転がり軸受ユニットの断面図。Sectional drawing of the rolling bearing unit for wheel support regarding the 1st example of embodiment of this invention. 同じく、軸受キャップの断面図（図３のＡ−Ａ断面図）。Similarly, a cross-sectional view of the bearing cap (A-A cross-sectional view of FIG. 3 ). 図２の左側から見た図。The figure seen from the left side of FIG. 図２の右側から見た図View from the right side of FIG. 本発明の実施の形態の第２例に関する、軸受キャップの断面図（図６のＢ−Ｂ断面図）。Sectional drawing of a bearing cap regarding the 2nd example of embodiment of this invention (BB sectional drawing of FIG. 6). 図５の左方から見た図。The figure seen from the left side of FIG. 本発明の実施の形態の第３例に関する、軸受キャップの断面図（図８のＣ−Ｃ断面図）。Sectional drawing of the bearing cap (CC sectional drawing of FIG. 8) regarding the 3rd example of embodiment of this invention. 図７の左方から見た図。The figure seen from the left side of FIG. 従来構造の１例を示す、転がり軸受ユニットの部分断面図。The partial cross section figure of a rolling bearing unit which shows one example of a conventional structure.

［実施の形態の第１例］
本発明の実施の形態の第１例に就いて、図１〜４により説明する。
本例の車輪支持用転がり軸受ユニット１ａは、外輪２ａと、ハブ３ａと、複数個の転動体４、４と、シールリング５と、軸受キャップ６ａとを備えると共に、車輪の回転速度を検出する為のエンコーダ７ａ及びセンサユニット８ａを備える。 [First Example of Embodiment]
A first example of the embodiment of the present invention will be described with reference to FIGS.
The wheel supporting rolling bearing unit 1a of this example includes an outer ring 2a, a hub 3a, a plurality of rolling elements 4, 4, a seal ring 5, and a bearing cap 6a, and detects the rotational speed of the wheel. It has an encoder 7a and a sensor unit 8a.

外輪２ａは、特許請求の範囲に記載した外径側軌道輪に相当するもので、外周面に静止側フランジ９を、内周面に複列の外輪軌道１０ａ、１０ｂを、それぞれ有している。この様な外輪２ａは、使用時に、静止側フランジ９を、懸架装置のナックルに結合固定する事により、この懸架装置に支持された状態で回転しない。 The outer ring 2a corresponds to the outer diameter side race ring described in the claims, and has a stationary side flange 9 on the outer peripheral surface and double-row outer ring raceways 10a, 10b on the inner peripheral surface, respectively. .. Such an outer ring 2a does not rotate in a state of being supported by the suspension device, by fixing the stationary side flange 9 to the knuckle of the suspension device during use.

ハブ３ａは、特許請求の範囲に記載した内径側軌道輪に相当するもので、ハブ本体１１と内輪１２とを結合する事により構成されており、外輪２ａの内径側にこの外輪２ａと同軸（同心）に配置されている。 The hub 3a corresponds to the inner diameter side race ring described in the claims and is configured by connecting the hub body 11 and the inner ring 12 to each other, and the inner ring side of the outer ring 2a is coaxial with the outer ring 2a ( Concentric).

ハブ本体１１の外周面のうち、外輪２ａの軸方向外端開口から軸方向外方に突出した部分には、車輪（従動輪）及び制動用回転部材を支持固定する為の円輪状の回転側フランジ１３が設けられている。又、ハブ本体１１の外周面のうち、外輪２ａの内周面に設けられた軸方向外側列の外輪軌道１０ａと対向する部分には、軸方向外側列の内輪軌道１４ａが設けられている。又、ハブ本体１１の外周面のうち、外輪２ａの内周面に設けられた軸方向内側列の外輪軌道１０ｂと対向する軸方向内端部には、小径段部１５が設けられている。 A portion of the outer peripheral surface of the hub body 11 that protrudes outward in the axial direction from the axially outer end opening of the outer ring 2a has a circular ring-shaped rotation side for supporting and fixing the wheel (driven wheel) and the braking rotary member. A flange 13 is provided. Further, in the outer peripheral surface of the hub body 11, a portion of the outer peripheral surface of the outer ring 2a facing the outer ring raceway 10a of the outer row in the axial direction is provided with an inner raceway 14a of the outer row in the axial direction. Further, a small-diameter step portion 15 is provided on the outer peripheral surface of the hub body 11 at the axially inner end portion facing the outer ring raceway 10b of the axially inner row provided on the inner peripheral surface of the outer ring 2a.

内輪１２の外周面には、軸方向内側列の内輪軌道１４ｂが設けられている。この様な内輪１２は、ハブ本体１１の小径段部１５に締り嵌めにより外嵌固定された状態で、ハブ本体１１の軸方向内端部に形成されたかしめ部１６により軸方向内端面を抑え付けられている。 On the outer peripheral surface of the inner ring 12, inner ring raceways 14b in the axially inner row are provided. The inner ring 12 is fixed to the small-diameter step portion 15 of the hub body 11 by an interference fit, and the axial inner end surface is suppressed by the caulking portion 16 formed at the axial inner end portion of the hub body 11. It is attached.

転動体４、４は、軸方向外側列の外輪軌道１０ａと内輪軌道１４ａとの間部分、及び、軸方向内側列の外輪軌道１０ｂと内輪軌道１４ｂとの間部分に、それぞれ複数個ずつ、保持器１７ａ、１７ｂにより保持された状態で転動自在に設けられている。尚、図示の例では、転動体４、４として玉を使用しているが、重量が嵩む自動車の車輪支持用転がり軸受ユニットの場合には、玉に代えて円すいころを使用する場合もある。 A plurality of rolling elements 4 and 4 are respectively held in a portion between the outer ring raceway 10a and the inner ring raceway 14a in the axial outer row and in a portion between the outer ring raceway 10b and the inner ring raceway 14b in the axial inner row. It is rotatably provided while being held by the containers 17a and 17b. Although balls are used as the rolling elements 4 and 4 in the illustrated example, tapered rollers may be used instead of balls in the case of a rolling bearing unit for supporting wheels of an automobile, which is heavy in weight.

前記エンコーダ７ａは、ハブ３ａを構成する内輪１２の軸方向内端部に支持固定されている。このエンコーダ７ａは、磁性金属板により断面Ｌ字形で全体を円環状に構成され、内輪１２の軸方向内端部に外嵌固定された支持環１８と、この支持環１８を構成する円輪部の軸方向内側面に添着固定された円輪状の永久磁石１９とを有する。この永久磁石１９の軸方向内側面である被検出部２０は、ハブ３ａと同軸に配置されている。この被検出部２０には、Ｓ極とＮ極とが円周方向に関して交互に且つ等ピッチで配置されている。 The encoder 7a is supported and fixed to the axially inner end portion of the inner ring 12 that constitutes the hub 3a. The encoder 7a is composed of a magnetic metal plate and has an L-shaped cross section, and has an annular shape as a whole. The support ring 18 is externally fitted and fixed to the axially inner end portion of the inner ring 12, and the circular ring portion that forms the support ring 18. And a ring-shaped permanent magnet 19 attached and fixed to the inner surface in the axial direction. The detected portion 20, which is the inner surface of the permanent magnet 19 in the axial direction, is arranged coaxially with the hub 3a. In the detected part 20, S poles and N poles are arranged alternately and at equal pitches in the circumferential direction.

シールリング５は、外輪２ａの軸方向外端部に支持固定された状態で、この外輪２ａの内周面とハブ３ａの外周面との間に存在する転動体４、４を設置した空間の軸方向外端開口を塞いでいる。 The seal ring 5 is supported and fixed to the axially outer end portion of the outer ring 2a, and in a state where the rolling elements 4 and 4 existing between the inner peripheral surface of the outer ring 2a and the outer peripheral surface of the hub 3a are installed. It blocks the axially outer end opening.

軸受キャップ６ａは、外輪２ａの軸方向内端開口部に取り付けられている。この様な軸受キャップ６ａは、金属環２１ａと、キャップ本体２２ａとを有する。 The bearing cap 6a is attached to the axially inner end opening of the outer ring 2a. Such a bearing cap 6a has a metal ring 21a and a cap body 22a.

金属環２１ａは、ステンレス鋼板や圧延鋼板等の金属板により、断面Ｌ字形で全体を円環状に構成されたもので、円筒状の嵌合筒部２３ａと、この嵌合筒部２３ａの軸方向内端部から径方向外方に折れ曲がる状態で設けられた外向鍔部２４ａと、これら嵌合筒部２３ａと外向鍔部２４ａとの連続部に存在する断面円弧形の屈曲部２５ａとを有する。又、外向鍔部２４ａの円周方向１箇所には、この外向鍔部２４ａの軸方向両側面と外周縁とに開口する半円形の切り欠き２６が設けられている。又、屈曲部２５ａの円周方向複数箇所には、透孔２７がそれぞれ設けられている。これら各透孔２７、２７はそれぞれ、軸方向外側に向かう程径方向外側に向かう方向に形成されている。又、本例の場合、それぞれが金属環２１ａに対する除肉部分である、１つの切り欠き２６及び複数の透孔２７、２７は、円周方向に関して等間隔に設けられている。 The metal ring 21a is made of a metal plate such as a stainless steel plate or a rolled steel plate, and has an L-shaped cross section and is formed into an annular shape. The metal ring 21a has a cylindrical fitting tubular portion 23a and an axial direction of the fitting tubular portion 23a. It has an outward flange portion 24a provided in a state of being bent outward in the radial direction from an inner end portion, and a bent portion 25a having an arc-shaped cross section that exists in a continuous portion of the fitting tubular portion 23a and the outward flange portion 24a. .. Further, a semicircular notch 26 is provided at one location in the circumferential direction of the outward flange portion 24a so as to open to both axial side surfaces and the outer peripheral edge of the outward flange portion 24a. Further, through holes 27 are provided at a plurality of positions in the circumferential direction of the bent portion 25a. Each of these through holes 27, 27 is formed so as to extend radially outward as it extends axially outward. Further, in the case of the present example, one notch 26 and the plurality of through holes 27, 27, which are thinned portions for the metal ring 21a, are provided at equal intervals in the circumferential direction.

キャップ本体２２ａは、合成樹脂を射出成形する事により、全体を有底円筒状に構成されたもので、樹脂筒部２８ａと、この樹脂筒部２８ａの軸方向内端部の内周部に外周部を結合された樹脂底板部２９ａとを有する。 The cap body 22a is formed into a bottomed cylindrical shape by injection molding a synthetic resin, and has a resin cylinder portion 28a and an outer circumference on an inner peripheral portion of an axial inner end portion of the resin cylinder portion 28a. And a resin bottom plate portion 29a to which the portions are joined.

樹脂筒部２８ａは、金属環２１ａを構成する外向鍔部２４ａと屈曲部２５ａと嵌合筒部２３ａの軸方向内端部とを包埋すると共に、この嵌合筒部２３ａの外周面の軸方向中間部を覆った状態で、自身を構成する合成樹脂の一部を、切り欠き２６の内側及び各透孔２７、２７の内側に入り込ませている。又、樹脂筒部２８ａのうち、嵌合筒部２３ａの外周面を覆った部分である外周覆部３０の軸方向外端面の径方向内半部には、全周に亙る係止溝３１が設けられている。この係止溝には、Ｏリング３２が係止されている。 The resin tubular portion 28a embeds the outward flange portion 24a, the bent portion 25a, and the axially inner end portion of the fitting tubular portion 23a that form the metal ring 21a, and the shaft of the outer peripheral surface of the fitting tubular portion 23a. With the intermediate portion in the direction covered, a part of the synthetic resin constituting itself is made to enter the inside of the notch 26 and the inside of each of the through holes 27, 27. Further, in the resin cylindrical portion 28a, a locking groove 31 is formed over the entire circumference in the radially inner half portion of the outer peripheral surface of the outer peripheral cover portion 30 that covers the outer peripheral surface of the fitting cylindrical portion 23a. It is provided. An O-ring 32 is locked in this locking groove.

樹脂底板部２９ａは、全体を略円板状に構成されている。この様な樹脂底板部２９ａは、円周方向に関して切り欠き２６と同位相となる部分に、周囲の部分に比べて軸方向肉厚が大きくなった（軸方向両側に向けて膨出した）厚肉部３３を有している。この厚肉部３３の軸方向から見た形状は、樹脂底板部２９ａの径方向に長い長円形である。又、この厚肉部３３の軸方向内半部の径方向外端部（図４に於ける上端部）は、樹脂筒部２８ａ（金属環２１ａの外向鍔部２４ａ）の径方向内半部と軸方向に重畳する位置まで達する状態で設けられている。又、厚肉部３３の径方向外端寄り部分には、軸方向に貫通する状態で挿入孔３４ａが設けられている。又、厚肉部３３の径方向内端寄り部分には、ナット３５が包埋されている。このナット３５は、内周面に設けられた雌ねじ部３６が軸方向内端面に開口した袋ナットである。このナット３５の軸方向内端面は、厚肉部３３の軸方向内側面と同一の仮想平面内に配置されている。 The resin bottom plate portion 29a is generally formed in a substantially disc shape. Such a resin bottom plate portion 29a is thicker in the axial direction at the portion in the same phase as the notch 26 in the circumferential direction than in the peripheral portion (bulging toward both sides in the axial direction). It has a meat portion 33. The shape of the thick wall portion 33 when viewed from the axial direction is an ellipse that is long in the radial direction of the resin bottom plate portion 29a. Further, the radially outer end portion (upper end portion in FIG. 4) of the axially inner half portion of the thick portion 33 is the radially inner half portion of the resin tubular portion 28a (the outward flange portion 24a of the metal ring 21a). It is provided so as to reach a position where it overlaps in the axial direction. Further, an insertion hole 34a is provided in a portion of the thick portion 33 near the radial outer end so as to penetrate in the axial direction. A nut 35 is embedded in a portion of the thick portion 33 near the radially inner end. The nut 35 is a cap nut in which a female screw portion 36 provided on the inner peripheral surface is opened on the inner end surface in the axial direction. The axially inner end surface of the nut 35 is arranged in the same virtual plane as the axially inner side surface of the thick portion 33.

又、厚肉部３３のうちで挿入孔３４ａとナット３５との間部分には、この厚肉部３３の軸方向外側面に開口する状態で、軸方向外側から見た形状が略鼓形の肉盗み部３７が設けられている。この肉盗み部３７は、厚肉部３３を構成する各部分の肉厚を均一に近づける事で、キャップ本体２２ａを射出成形する際の樹脂材料の凝固時間を短くしてラインタクトの向上を図ると共に、成形収縮によるキャップ本体２２ａの変形防止を図る事などを目的として設けられている。 In addition, in the portion of the thick portion 33 between the insertion hole 34a and the nut 35, the shape viewed from the outside in the axial direction is substantially drum-shaped while opening to the outer side surface in the axial direction of the thick portion 33. A meat stealing section 37 is provided. The wall-thickening portion 37 makes the wall thicknesses of the respective parts constituting the thick-walled portion 33 evenly close to each other, thereby shortening the solidification time of the resin material when the cap body 22a is injection-molded and improving the line tact. At the same time, it is provided for the purpose of preventing deformation of the cap body 22a due to molding shrinkage.

又、樹脂底板部２９ａの軸方向外側面のうち、円周方向に関して各透孔２７、２７と同位相となる複数箇所には、それぞれが放射方向に伸長するリブ３８、３８が設けられている。これら各リブ３８、３８は、樹脂底板部２９ａの径方向中心部又は中心寄り部分から径方向外端部に至る範囲に設けられている。そして、各リブ３８、３８の径方向外端部は、樹脂筒部２８ａの内周面にそれぞれ接続されている。 Also, ribs 38, 38 that extend in the radial direction are provided at a plurality of locations on the outer side surface in the axial direction of the resin bottom plate portion 29a that are in the same phase as the through holes 27, 27 in the circumferential direction. .. These ribs 38, 38 are provided in the range from the radial center portion or the portion near the center of the resin bottom plate portion 29a to the radial outer end portion. The radial outer ends of the ribs 38, 38 are connected to the inner peripheral surface of the resin tubular portion 28a.

上述の様な軸受キャップ６ａは、金属環２１ａを構成する嵌合筒部２３ａの軸方向外端部を外輪２ａの軸方向内端部内周面に締り嵌めで内嵌する事により、この外輪２ａの軸方向内端開口部に取り付けられている。又、この状態で、キャップ本体２２ａの外周覆部３０の軸方向外端面が、外輪２ａの軸方向内端面に突き当てられる事で、この外輪２ａに対する軸受キャップ６ａの軸方向に関する位置決めが図られている。これと共に、Ｏリング３２が、係止溝３１の底面と外輪２ａの軸方向内端面との間で弾性的に圧縮される事で、これら両面同士の間部分がシールされている。 In the bearing cap 6a as described above, by fitting the axially outer end portion of the fitting tubular portion 23a constituting the metal ring 21a onto the inner circumferential surface of the axially inner end portion of the outer ring 2a by interference fitting, the outer ring 2a is formed. Is attached to the axially inner end opening. Further, in this state, the axial outer end surface of the outer peripheral cover portion 30 of the cap body 22a is abutted against the axial inner end surface of the outer ring 2a, whereby the axial positioning of the bearing cap 6a with respect to the outer ring 2a is achieved. ing. At the same time, the O-ring 32 is elastically compressed between the bottom surface of the locking groove 31 and the axially inner end surface of the outer ring 2a, so that the portion between these two surfaces is sealed.

尚、上述の様に嵌合筒部２３ａの軸方向外端部を外輪２ａの軸方向内端部内周面に締り嵌めで内嵌する際には、キャップ本体２２ａを構成する樹脂筒部２８ａの軸方向内端面のうち、円周方向に関して厚肉部３３の径方向外端部（及び切り欠き２６）から外れた位置に、軸方向の押圧力Ｆを加える。そして、この押圧力Ｆを、金属環２１ａを構成する外向鍔部２４ａに伝える事により、この金属環２１ａを構成する嵌合筒部２３ａの軸方向外端部を、外輪２ａの軸方向内端部内周面に軸方向内側から圧入する。 As described above, when the axial outer end portion of the fitting tubular portion 23a is internally fitted to the inner circumferential surface of the axial inner end portion of the outer ring 2a by an interference fit, the resin tubular portion 28a forming the cap body 22a is inserted. A pressing force F in the axial direction is applied to a position on the inner end surface in the axial direction that is deviated from the outer end portion (and the notch 26) of the thick portion 33 in the circumferential direction. Then, by transmitting this pressing force F to the outward brim portion 24a forming the metal ring 21a, the axial outer end portion of the fitting cylinder portion 23a forming the metal ring 21a is made to the axial inner end of the outer ring 2a. It is pressed into the inner surface of the part from the inside in the axial direction.

ここで、樹脂筒部２８ａの軸方向内端面に加えた押圧力Ｆを、外向鍔部２４ａに効率良く伝えられる様にする為には、この外向鍔部２４ａの径方向幅寸法を極力大きくする事が好ましい。そこで、本例の場合には、この外向鍔部２４ａの径方向幅寸法を極力大きくする為に、この外向鍔部２４ａの外径寸法を、樹脂筒部２８ａの外径寸法に近づけて十分に大きくしている。 Here, in order to efficiently transmit the pressing force F applied to the axially inner end surface of the resin tubular portion 28a to the outward flange portion 24a, the radial width dimension of the outward flange portion 24a is maximized. Things are preferred. Therefore, in the case of this example, in order to maximize the radial width dimension of the outward flange portion 24a, the outer diameter dimension of the outward flange portion 24a should be sufficiently close to the outer diameter dimension of the resin tubular portion 28a. It's getting bigger.

センサユニット８ａは、合成樹脂製のセンサホルダ３９と、センサ４０とを含んで構成されている。このうちのセンサホルダ３９は、円柱状（棒状）のホルダ本体部４１と、このホルダ本体部４１の基端部（軸方向内端部）に設けられた取付フランジ部４２とを有している。又、センサ４０は、ホールＩＣ、ホール素子、ＭＲ素子、ＧＭＲ素子等の磁気検知素子及び波形成形回路を組み込んだＩＣから成るもので、ホルダ本体部４１の先端部（軸方向外端部）に包埋されている。 The sensor unit 8a includes a sensor holder 39 made of synthetic resin and a sensor 40. The sensor holder 39 has a columnar (rod-shaped) holder main body 41 and a mounting flange 42 provided at the base end (axial inner end) of the holder main body 41. .. Further, the sensor 40 is composed of a Hall IC, a Hall element, an MR element, an IC incorporating a magnetic sensing element such as a GMR element, and a waveform shaping circuit. It is embedded.

上述の様なセンサユニット８ａは、ホルダ本体部４１を軸受キャップ６ａの挿入孔３４ａに挿入する事によって、センサ４０の検出部をエンコーダ７ａの被検出部２０に対し軸方向に近接対向させている。又、この状態で、センサユニット８ａは、取付フランジ部４２の軸方向外側面を軸受キャップ６ａの厚肉部３３の軸方向内側面に当接させる事により、軸方向の位置決めを図られている。更に、この状態で、センサユニット８ａは、取付フランジ部４２に設けられた通孔４３に挿通した図示しないボルトを、ナット３５の雌ねじ部３６に螺合させ、更に締め付ける事により、軸受キャップ６ａに支持固定されている。 In the sensor unit 8a as described above, the detecting portion of the sensor 40 is axially closely opposed to the detected portion 20 of the encoder 7a by inserting the holder main body portion 41 into the insertion hole 34a of the bearing cap 6a. .. Further, in this state, the sensor unit 8a is positioned in the axial direction by bringing the axially outer surface of the mounting flange portion 42 into contact with the axially inner surface of the thick portion 33 of the bearing cap 6a. .. Further, in this state, the sensor unit 8a allows the bolt (not shown) inserted through the through hole 43 provided in the mounting flange portion 42 to be screwed into the female screw portion 36 of the nut 35, and further tightened to attach the bolt to the bearing cap 6a. Supported and fixed.

尚、本例の構造を実施する場合、キャップ本体２２ａやセンサホルダ３９を構成する合成樹脂としては、例えば、ポリアミド樹脂に、グラスファイバーを適宜加えた繊維強化樹脂材料を使用する事ができる。又、必要に応じて、ポリアミド樹脂に、非晶性芳香族ポリアミド樹脂（変性ポリアミド６Ｔ／６Ｉ）、低吸水脂肪族ポリアミド樹脂（ポリアミド１１樹脂、ポリアミド１２樹脂、ポリアミド６１０樹脂、ポリアミド６１２樹脂）を適宜加える事で、より耐水性を向上させても良い。 In the case of implementing the structure of this example, as the synthetic resin forming the cap body 22a and the sensor holder 39, for example, a fiber reinforced resin material obtained by appropriately adding glass fiber to polyamide resin can be used. In addition, if necessary, an amorphous aromatic polyamide resin (modified polyamide 6T/6I), a low water absorption aliphatic polyamide resin (polyamide 11 resin, polyamide 12 resin, polyamide 610 resin, polyamide 612 resin) may be added to the polyamide resin. Water resistance may be further improved by adding appropriately.

上述の様に構成する本例の車輪支持用転がり軸受ユニットの使用時には、外輪２ａの静止側フランジ９を懸架装置のナックルに結合固定すると共に、ハブ３ａの回転側フランジ１３に車輪及び制動用回転部材を支持固定する事で、懸架装置に対して車輪及び制動用回転部材を回転自在に支持する。この状態で車輪が回転すると、センサ４０の近傍を、エンコーダ７ａの被検出面に配置されたＳ極とＮ極とが交互に通過する。この結果、センサ４０の検出部内を流れる磁束の密度が変化し、このセンサ４０の出力信号が変化する。この様にしてセンサ４０の出力信号が変化する周波数は、車輪の回転速度に比例する。従って、この出力信号を図示しない制御器に送れば、ＡＢＳ等を適切に制御できる。 When the rolling bearing unit for wheel support according to the present embodiment configured as described above is used, the stationary side flange 9 of the outer ring 2a is coupled and fixed to the knuckle of the suspension device, and the wheel side and braking rotations 13 are fixed to the rotating side flange 13 of the hub 3a. By supporting and fixing the member, the wheel and the braking rotating member are rotatably supported by the suspension device. When the wheel rotates in this state, the S pole and the N pole arranged on the surface to be detected of the encoder 7a alternately pass near the sensor 40. As a result, the density of the magnetic flux flowing in the detecting portion of the sensor 40 changes, and the output signal of the sensor 40 changes. The frequency at which the output signal of the sensor 40 changes in this manner is proportional to the wheel rotation speed. Therefore, if this output signal is sent to a controller (not shown), ABS and the like can be controlled appropriately.

次に、上述の様に構成する本例の車輪支持用転がり軸受ユニットのうち、軸受キャップ６ａの製造方法に就いて説明する。 Next, a method of manufacturing the bearing cap 6a of the rolling bearing unit for wheel support of the present embodiment configured as described above will be described.

本例の場合、軸受キャップ６ａを構成するキャップ本体２２ａの射出成形を行う際には、金属環２１ａ及びナット３５を、金型に設けられた成形用空間（キャビティ）内にセットした状態で、この成形用空間に溶融樹脂を流し込む事により、キャップ本体２２ａの成形と同時に、このキャップ本体２２ａに金属環２１ａ及びナット３５を包埋する。 In the case of this example, when performing the injection molding of the cap body 22a constituting the bearing cap 6a, in a state where the metal ring 21a and the nut 35 are set in the molding space (cavity) provided in the mold, By pouring the molten resin into the molding space, the metal ring 21a and the nut 35 are embedded in the cap body 22a at the same time when the cap body 22a is molded.

特に、本例の場合、前記成形用空間内に金属環２１ａをセットする際には、切り欠き２６を利用して、この金属環２１ａの円周方向に関する位置決めを行う。これにより、各透孔２７、２７と、各リブ３８、３８の成形位置との、円周方向に関する位相を一致させる。 In particular, in the case of this example, when the metal ring 21a is set in the molding space, the notch 26 is used to position the metal ring 21a in the circumferential direction. As a result, the phases of the through holes 27, 27 and the molding positions of the ribs 38, 38 in the circumferential direction are matched.

又、前記成形用空間に対して溶融樹脂を流し込む為のゲートは、樹脂底板部２９ａの軸方向内側面のうち、径方向中央寄りで厚肉部３３の近傍に対応する部分に位置させる。この様なゲートから樹脂底板部２９ａの成形用空間に送り込まれた溶融樹脂は、この樹脂底板部２９ａの成形用空間の全体に行き渡ると共に、樹脂筒部２８ａの成形用空間に送り込まれ、この樹脂筒部２８ａの成形用空間の全体に行き渡る。 Further, the gate for pouring the molten resin into the molding space is located on a portion of the inner surface of the resin bottom plate portion 29a in the axial direction near the radial center and corresponding to the vicinity of the thick portion 33. The molten resin sent from such a gate to the molding space of the resin bottom plate portion 29a spreads throughout the molding space of the resin bottom plate portion 29a and is also sent to the molding space of the resin tubular portion 28a. It covers the entire molding space of the tubular portion 28a.

ここで、本例の場合には、前述した様に、圧入の為の押圧力Ｆを外向鍔部２４ａに効率良く伝えられる様にすべく、この外向鍔部２４ａの径方向幅寸法を極力大きくする為に、この外向鍔部２４ａの外径寸法を、樹脂筒部２８ａの外径寸法に近づけて十分に大きくしている。この為、この樹脂筒部２８ａのうちで外向鍔部２４ａの径方向外側に位置する部分は、径方向の肉厚が小さくなっている。従って、樹脂底板部２９ａの成形用空間から樹脂筒部２８ａの成形用空間に送り込まれた溶融樹脂は、図２の矢印Ｘ1で示す様に、外向鍔部２４ａの径方向外側を通じて、外周覆部３０の成形用空間に送り込まれにくくなっている。 Here, in the case of this example, as described above, in order to efficiently transmit the pressing force F for press fitting to the outward flange portion 24a, the radial width dimension of the outward flange portion 24a is maximized. Therefore, the outer diameter dimension of the outward flange portion 24a is made sufficiently close to the outer diameter dimension of the resin tubular portion 28a. Therefore, a portion of the resin tubular portion 28a located on the outer side in the radial direction of the outward flange portion 24a has a small radial thickness. Therefore, the molten resin sent from the molding space of the resin bottom plate portion 29a into the molding space of the resin tubular portion 28a passes through the outer side in the radial direction of the outward flange portion 24a as shown by the arrow X 1 in FIG. It is hard to be sent into the molding space of the portion 30.

但し、本例の場合には、金属環２１ａを構成する屈曲部２５ａの円周方向複数箇所に透孔２７、２７が設けられていると共に、金属環２１ａを構成する外向鍔部２４ａの円周方向１箇所に切り欠き２６が設けられている。この為、樹脂底板部２９ａの成形用空間から樹脂筒部２８ａの成形用空間に送り込まれた溶融樹脂は、図２に矢印Ｘ2、Ｘ3で示す様に、各透孔２７及び切り欠き２６を通じて、外周覆部３０の成形用空間に効率良く送り込む事ができる。 However, in the case of this example, through holes 27, 27 are provided at a plurality of circumferential positions of the bent portion 25a forming the metal ring 21a, and the circumference of the outward flange portion 24a forming the metal ring 21a is formed. A notch 26 is provided at one location in the direction. Therefore, the molten resin fed into the molding space of the resin tube portion 28a from the molding space of the resin base plate portion 29a, as shown by the arrow X 2, X 3 in FIG. 2, each through hole 27 and the cutout 26 Through this, it is possible to efficiently feed it into the molding space of the outer peripheral cover portion 30.

特に、本例の場合には、各透孔２７、２７が、軸方向外側に向かう程径方向外側に向かう方向（図示の例では、金属環２１ａの中心軸に対して約４５度の傾斜角度）にそれぞれ形成されている。この為、樹脂底板部２９ａの成形用空間から樹脂筒部２８ａの成形用空間に送り込まれた溶融樹脂の流れ方向を大きく変える事なく、この溶融樹脂を各透孔２７、２７を通じて、外周覆部３０の成形用空間の奥部（軸方向外端部）に向けて効率良く送り込む事ができる。 In particular, in the case of this example, the through holes 27, 27 are directed radially outward as they go axially outward (in the illustrated example, an inclination angle of about 45 degrees with respect to the central axis of the metal ring 21a). ) Are formed respectively. Therefore, the molten resin is passed through the through holes 27, 27 without changing the flow direction of the molten resin fed from the molding space of the resin bottom plate portion 29a to the molding space of the resin tubular portion 28a. It can be efficiently fed toward the inner part (axial outer end part) of the molding space 30.

又、本例の場合には、樹脂底板部２９ａの軸方向外側面のうち、円周方向に関して各透孔２７、２７と同位相となる複数箇所に放射方向に伸長するリブ３８、３８が設けられている。この為、これら各リブ３８、３８により樹脂底板部２９ａを補強できるだけでなく、前記ゲートから樹脂底板部２９ａの成形用空間に送り込まれた溶融樹脂を、各リブ３８、３８の成形用空間に沿って径方向外側に導く事により、より多くの溶融樹脂を、各透孔２７、２７内に効率良く送り込む事ができる。
従って、本例の場合には、キャップ本体２２ａの射出成形を効率良く行える。 Further, in the case of this example, ribs 38, 38 extending in the radial direction are provided at a plurality of locations on the outer side surface in the axial direction of the resin bottom plate portion 29a in the same phase as the through holes 27, 27 in the circumferential direction. Has been. Therefore, not only can the resin bottom plate portion 29a be reinforced by these ribs 38, 38, but also the molten resin fed from the gate into the molding space of the resin bottom plate portion 29a can be guided along the molding space of the ribs 38, 38. By guiding the resin to the outer side in the radial direction, a larger amount of molten resin can be efficiently fed into the through holes 27, 27.
Therefore, in the case of this example, the injection molding of the cap body 22a can be efficiently performed.

又、本例の場合、屈曲部２５ａに設けられた各透孔２７、２７は、金属環２１ａを構成する金属板の一部を貫通しているだけであり、外向鍔部２４ａの外周縁には開口しない為、各透孔２７、２７の存在に基づいて、外向鍔部２４ａの剛性（前記押圧力Ｆの支承能力）が低下する事を十分に抑える事ができる。 Further, in the case of this example, the through holes 27, 27 provided in the bent portion 25a only penetrate a part of the metal plate forming the metal ring 21a, and the through holes 27, 27 are formed on the outer peripheral edge of the outward flange portion 24a. Since the holes are not opened, it is possible to sufficiently prevent the rigidity of the outward brim portion 24a (bearing capacity of the pressing force F) from being reduced due to the presence of the through holes 27, 27.

又、本例の場合、外向鍔部２４ａの円周方向１箇所の径方向外半部には、この外向鍔部２４ａの外周縁に開口する切り欠き２６が設けられている。この様な切り欠き２６の存在は、各透孔２７、２７に比べて外向鍔部２４ａの剛性を低下させ易い。但し、本例の場合には、円周方向に関する切り欠き２６の位相を厚肉部３３と一致させる事により、前記押圧力Ｆを、切り欠き２６が存在する円周方向位置に直接加えない様にしている。この為、この切り欠き２６の存在に拘わらず、前記押圧力Ｆを外向鍔部２４ａにより効率良く支承（伝達）する事ができる。
又、本例の場合には、金属環２１ａに設けられた切り欠き２６及び各透孔２７、２７に、キャップ本体２２ａを構成する合成樹脂の一部が入り込んでいる為、金属環２１ａとキャップ本体２２との相対回転を有効に防止する事ができる。 Further, in the case of this example, a notch 26 opening to the outer peripheral edge of the outward flange portion 24a is provided in one radial outer half portion of the outward flange portion 24a in the circumferential direction. The presence of such a notch 26 is more likely to reduce the rigidity of the outward flange 24a than the through holes 27, 27. However, in the case of the present example, by making the phase of the notch 26 in the circumferential direction coincide with the thick portion 33, the pressing force F is not directly applied to the circumferential position where the notch 26 exists. I have to. Therefore, regardless of the presence of the notch 26, the pressing force F can be efficiently supported (transmitted) by the outward flange portion 24a.
Further, in the case of this example, since the notch 26 and each of the through holes 27, 27 provided in the metal ring 21a contain a part of the synthetic resin forming the cap body 22a, the metal ring 21a and the cap are The relative rotation with the main body 22 can be effectively prevented.

［実施の形態の第２例］
本発明の実施の形態の第２例に就いて、図５〜６により説明する。
本例の場合には、軸受キャップ６ｂの構成が、上述した実施の形態の第１例の場合と異なる。 [Second Example of Embodiment]
A second example of the embodiment of the present invention will be described with reference to FIGS.
In the case of this example, the structure of the bearing cap 6b is different from that of the first example of the above-described embodiment.

即ち、本例の場合には、金属環２１ｂを構成する外向鍔部２４ａの円周方向１箇所に設けられた切り欠き２６ａの縁形状を、弦形状（直線形状）としている。これと共に、この切り欠き２６ａの円周方向に関する幅寸法（前記境界の長さ寸法）を、キャップ本体２２ｂを構成する厚肉部３３の円周方向に関する幅寸法よりも大きくしている。 That is, in the case of this example, the edge shape of the notch 26a provided at one position in the circumferential direction of the outward flange portion 24a forming the metal ring 21b is a chord shape (linear shape). Along with this, the width dimension in the circumferential direction of the notch 26a (the length dimension of the boundary) is made larger than the width dimension in the circumferential direction of the thick portion 33 forming the cap body 22b.

そして、この様な縁形状及び幅寸法を有する切り欠き２６ａを設ける事により、キャップ本体２２ｂの射出成形を行う際に、切り欠き２６ａを利用した金属環２１ｂの円周方向に関する位置決めを、行い易くしている。別な言い方をすれば、この位置決めの作業を、機械により自動化し易くしている。 By providing the notch 26a having such edge shape and width dimension, it is easy to perform the positioning in the circumferential direction of the metal ring 21b using the notch 26a when performing the injection molding of the cap body 22b. doing. In other words, this positioning work is easily automated by a machine.

又、本例の場合には、キャップ本体２２ｂを構成する樹脂底板部２９ａの軸方向外側面に設けられた各リブ３８ａ、３８ａの径方向外端部を、樹脂底板部２９ａの径方向外端寄り部分に位置させる事で、各リブ３８ａ、３８ａの径方向外端部と樹脂筒部２８ａの内周面とを径方向に離隔している。これにより、樹脂底板部２９ａの径方向外端部のうち、円周方向に関して各リブ３８ａ、３８ａ（各透孔２７、２７）と同位相となる複数箇所に、それぞれ径方向内側に隣接する部分（リブ３８ａ、３８ａが存在する部分）に比べて軸方向厚さ寸法が小さくなった狭窄部４４、４４を設けている。 Further, in the case of this example, the radial outer ends of the ribs 38a, 38a provided on the axially outer surface of the resin bottom plate portion 29a forming the cap body 22b are replaced by the radial outer ends of the resin bottom plate portion 29a. By locating the ribs 38a, 38a, 38b, the radial outer ends of the ribs 38a, 38a are radially separated from the inner peripheral surface of the resin tubular portion 28a. As a result, in the radially outer end portion of the resin bottom plate portion 29a, portions radially inwardly adjacent to a plurality of locations having the same phase as the ribs 38a, 38a (the through holes 27, 27) in the circumferential direction. The narrowed portions 44, 44 having the axial thickness dimension smaller than that of (the portions where the ribs 38a, 38a exist) are provided.

そして、この様な各狭窄部４４、４４を設ける事により、キャップ本体２２ｂの射出成形時に、各リブ３８ａ、３８ａに沿って径方向外側に流れてきた溶融樹脂の流速を、各狭窄部４４、４４で上昇させると共に、これら各狭窄部４４、４４から径方向外側に送り出された溶融樹脂の流れを所定のスプレー角で扇状に広げる事により、この様に扇状に広げた溶融樹脂の一部を、各透孔２７、２７内に勢い良く送り込める様にしている。図５の矢印Ｘ4は、この際に各透孔２７に送り込まれる溶融樹脂の流れを示している。 By providing such narrowed portions 44, 44, the flow velocity of the molten resin flowing radially outward along the ribs 38a, 38a at the time of injection molding of the cap body 22b, the flow velocity of the molten resin is reduced. The molten resin flown radially outward from each of the narrowed portions 44 and 44 is fanned at a predetermined spray angle while being raised by 44, and a part of the molten resin thus fanned out is spread. , So that it can be sent into each through hole 27, 27 vigorously. The arrow X 4 in FIG. 5 indicates the flow of the molten resin fed into each through hole 27 at this time.

更に、本例の場合には、各リブ３８ａ、３８ａの径方向外端部に、径方向外側に向かう程これら各リブ３８ａ、３８ａの軸方向高さ寸法が小さくなる方向に傾斜した傾斜面部４５、４５を設けている。これにより、各リブ３８ａ、３８ａに沿って径方向外側に流れてきた溶融樹脂が、各傾斜面部４５、４５に案内される事で、各狭窄部４４、４４に円滑に送り込まれる様にしている。
その他の構成及び作用は、上述した実施の形態の第１例の場合と同様である。 Further, in the case of the present example, the inclined surface portion 45 that is inclined at the radially outer end of each rib 38a, 38a in the direction in which the axial height dimension of each rib 38a, 38a decreases toward the radially outer side. , 45 are provided. As a result, the molten resin flowing radially outward along the ribs 38a, 38a is guided to the inclined surface portions 45, 45 so that the molten resin can be smoothly fed into the narrowed portions 44, 44. ..
Other configurations and operations are similar to those of the first example of the above-described embodiment.

［実施の形態の第３例］
本発明の実施の形態の第３例に就いて、図７〜８により説明する。
本例の場合には、軸受キャップ６ｃの構成が、上述した実施の形態の第１例の場合と異なる。 [Third Example of Embodiment]
A third example of the embodiment of the present invention will be described with reference to FIGS.
In the case of this example, the configuration of the bearing cap 6c is different from that in the case of the first example of the above-described embodiment.

即ち、本例の場合には、キャップ本体２２ｃを構成する樹脂底板部２９ａの軸方向外側面に、リブを設けていない。又、これに伴い、金属環２１ｃを構成する外向鍔部２４ａのうちで、円周方向に関して厚肉部３３と同位相となる部分に、切り欠きを設けていない。その代わりに、金属環２１ｃを構成する屈曲部２５ａのうちで、円周方向に関して厚肉部３３と同位相となる部分にも、他の円周方向部分に設けられた各透孔２７、２７と同様の透孔２７ａを設けている。 That is, in the case of this example, no rib is provided on the axially outer side surface of the resin bottom plate portion 29a forming the cap body 22c. Along with this, a cutout is not provided in a portion of the outward flange portion 24a forming the metal ring 21c, which has the same phase as the thick portion 33 in the circumferential direction. Instead, in the bent portion 25a forming the metal ring 21c, the through holes 27, 27 provided in the other circumferential portion even in the portion in the same phase as the thick portion 33 in the circumferential direction. A through hole 27a similar to the above is provided.

又、本例の場合には、樹脂底板部２９ａの軸方向外側面の径方向外端部のうち、円周方向に関して厚肉部３３から外れた部分の全体に、軸方向に凹入する欠円環状の凹部４６を設けている。別な言い方をすれば、円周方向に関して各透孔２７、２７と同位相となる箇所を含む円周方向範囲に、上述の様な凹部４６を設けている。これにより、樹脂底板部２９ａの径方向外端部のうち、凹部４６と軸方向に重畳する部分に、径方向内側に隣接する部分に比べて軸方向厚さ寸法が小さくなった狭窄部４４ａを設けている。 In addition, in the case of this example, a portion of the radially outer end portion of the axially outer side surface of the resin bottom plate portion 29a, which is axially recessed, is entirely recessed from the thick portion 33 in the circumferential direction. An annular recess 46 is provided. In other words, the concave portion 46 as described above is provided in the circumferential range including the portions having the same phase as the through holes 27, 27 in the circumferential direction. As a result, in the radially outer end of the resin bottom plate portion 29a, a narrowed portion 44a having an axial thickness smaller than that of a portion adjacent to the radially inner side is formed in a portion that axially overlaps the recess 46. It is provided.

上述の様な構成を有する本例の場合には、樹脂底板部２９ａの軸方向外側面にリブを設けていない為、キャップ本体２２ｃの射出成形時に、リブと透孔２７、２７との円周方向に関する位相を一致させる為の、金属環２１ｃの円周方向の位置決めを行う必要がない（外向鍔部２４ａに切り欠きを設ける必要がない）。
又、外向鍔部２４ａに切り欠きを設けていない為、この外向鍔部２４ａの剛性を向上させる事ができる。
又、切り欠きの代わりに、屈曲部２５ａのうちで、円周方向に関して厚肉部３３と同位相となる部分に透孔２７ａを設けている為、この透孔２７ａを通じて溶融樹脂を外周覆部３０の成形用空間に効率良く送り込む事ができる。
又、狭窄部４４ａの存在に基づいて、上述した実施の形態の第２例の狭窄部４４、４４と同様の作用により、各透孔２７、２７に溶融樹脂を勢い良く送り込む事ができる。
その他の構成及び作用は、上述した実施の形態の第１例の場合と同様である。 In the case of this example having the above-described configuration, since the rib is not provided on the outer surface in the axial direction of the resin bottom plate portion 29a, the circumference of the rib and the through holes 27, 27 during the injection molding of the cap body 22c. It is not necessary to position the metal ring 21c in the circumferential direction in order to match the phases with respect to the direction (it is not necessary to provide a notch in the outward flange portion 24a).
Further, since the outward flange portion 24a is not provided with a notch, the rigidity of the outward flange portion 24a can be improved.
Further, instead of the notch, the through hole 27a is provided in the bent portion 25a in the same phase as the thick portion 33 in the circumferential direction. It can be efficiently sent to the molding space of 30.
Further, based on the existence of the narrowed portions 44a, the molten resin can be vigorously fed into the through holes 27, 27 by the same action as the narrowed portions 44, 44 of the second example of the above-described embodiment.
Other configurations and operations are similar to those in the case of the first example of the above-described embodiment.

本発明は、センサユニットを支持固定する為の構造を有しない軸受キャップに適用する事もできる。
又、本発明を実施する場合で、軸受キャップを構成するキャップ本体の樹脂底板部に、センサホルダを構成するホルダ本体部を挿入する為の挿入孔を設ける場合には、この挿入孔を、軸方向他端開口（軸方向外端開口）の全体が合成樹脂により塞がれた有底孔とする事もできる。この様な構成を採用する場合には、エンコーダの被検出部とセンサの検出部とが、当該合成樹脂を介して軸方向に対向する事になる。
又、本発明を実施する場合には、軸受キャップの金属環を構成する嵌合筒部の外周面の全体を樹脂筒部により覆った構造を採用する事もできる。この様な構成を採用する場合、金属環を構成する嵌合筒部は、少なくともこの嵌合筒部の外周面を覆う樹脂筒部（特許請求の範囲に記載した他の部材）を介して、転がり軸受ユニットを構成する外径側軌道輪の軸方向片端部に内嵌される事になる。
又、本発明の転がり軸受ユニットは、車輪支持用に限らず、各種機械装置に組み込まれる転がり軸受ユニットを対象とする事ができる。
尚、本発明とは異なるが、金属環に設ける溶融樹脂を通過させる為の透孔は、この金属環を構成する嵌合筒部の軸方向片端部や、この金属環を構成する外向鍔部や、前記嵌合筒部の軸方向片端部から屈曲部を経て前記外向鍔部までの連続した範囲に設ける事もできる。 The present invention can also be applied to a bearing cap that does not have a structure for supporting and fixing the sensor unit.
Further, in the case of implementing the present invention, when the resin bottom plate portion of the cap main body forming the bearing cap is provided with an insertion hole for inserting the holder main body forming the sensor holder, this insertion hole is The entire other end opening in the direction (outer end opening in the axial direction) may be a bottomed hole closed with a synthetic resin. When such a configuration is adopted, the detected portion of the encoder and the detection portion of the sensor face each other in the axial direction with the synthetic resin in between.
Further, in the case of implementing the present invention, it is also possible to adopt a structure in which the entire outer peripheral surface of the fitting tubular portion forming the metal ring of the bearing cap is covered with the resin tubular portion. When adopting such a configuration, the fitting tubular portion forming the metal ring has a resin tubular portion (another member described in the claims) covering at least the outer peripheral surface of the fitting tubular portion, It will be fitted in one axial end of the outer diameter side race ring that constitutes the rolling bearing unit.
Further, the rolling bearing unit of the present invention is not limited to supporting a wheel, but can be a rolling bearing unit incorporated in various mechanical devices.
Although different from the present invention, the through hole provided in the metal ring for allowing the molten resin to pass through is the axially one end of the fitting cylinder part forming the metal ring, and the outward flange part forming the metal ring. Alternatively, it may be provided in a continuous range from one end portion in the axial direction of the fitting tubular portion to the outward flange portion via a bent portion.

１、１ａ 車輪支持用転がり軸受ユニット
２、２ａ 外輪
３、３ａ ハブ
４ 転動体
５ シールリング
６、６ａ〜６ｃ 軸受キャップ
７、７ａ エンコーダ
８、８ａ センサユニット
９ 静止側フランジ
１０ａ、１０ｂ 外輪軌道
１１ ハブ本体
１２ 内輪
１３ 回転側フランジ
１４ａ、１４ｂ 内輪軌道
１５ 小径段部
１６ かしめ部
１７ａ、１７ｂ 保持器
１８ 支持環
１９ 永久磁石
２０ 被検出部
２１、２１ａ〜２１ｃ 金属環
２２、２２ａ〜２２ｃ キャップ本体
２３、２３ａ 嵌合筒部
２４、２４ａ 外向鍔部
２５、２５ａ 屈曲部
２６、２６ａ 切り欠き
２７、２７ａ 透孔
２８、２８ａ 樹脂筒部
２９、２９ａ 樹脂底板部
３０ 外周覆部
３１ 係止溝
３２ Ｏリング
３３ 厚肉部
３４、３４ａ 挿入孔
３５ ナット
３６ 雌ねじ部
３７ 肉盗み部
３８、３８ａ リブ
３９ センサホルダ
４０ センサ
４１ ホルダ本体部
４２ 取付フランジ部
４３ 通孔
４４、４４ａ 狭窄部
４５ 傾斜面部
４６ 凹部 1, 1a Wheel support rolling bearing unit 2, 2a Outer ring 3, 3a Hub 4 Rolling element 5 Seal ring 6, 6a to 6c Bearing cap 7, 7a Encoder 8, 8a Sensor unit 9 Stationary side flange 10a, 10b Outer ring raceway 11 Hub Main body 12 Inner ring 13 Rotational side flanges 14a, 14b Inner ring raceway 15 Small diameter step portion 16 Caulking portion 17a, 17b Retainer 18 Support ring 19 Permanent magnet 20 Detected portion 21, 21a-21c Metal ring 22, 22a-22c Cap body 23, 23a Fitting tubular portion 24, 24a Outward flange portion 25, 25a Bent portion 26, 26a Notch 27, 27a Through hole 28, 28a Resin tubular portion 29, 29a Resin bottom plate portion 30 Outer peripheral cover portion 31 Locking groove 32 O-ring 33 Thick part 34, 34a Insertion hole 35 Nut 36 Female thread part 37 Meat steal part 38, 38a Rib 39 Sensor holder 40 Sensor 41 Holder body part 42 Mounting flange part 43 Through hole 44, 44a Narrow part 45 Sloping surface part 46 Recess

Claims (4)

金属板製の金属環と、合成樹脂製のキャップ本体とを備え、
前記金属環は、転がり軸受ユニットを構成する外径側軌道輪の軸方向片端部に直接又は他の部材を介して内嵌される嵌合筒部と、この嵌合筒部の軸方向片端部から径方向外方に折れ曲がる状態で設けられた外向鍔部と、前記嵌合筒部と前記外向鍔部との連続部に存在する断面円弧形の屈曲部とを有しており、
前記キャップ本体は、前記金属環のうちで少なくとも前記外向鍔部及び前記屈曲部を包埋する樹脂筒部と、この樹脂筒部の軸方向片端部の内周部に外周部を結合された樹脂底板部とを有している、
軸受キャップであって、
前記屈曲部に、軸方向他側に向かう程径方向外側に向かう方向に傾斜した透孔が設けられていると共に、この透孔内に、前記合成樹脂の一部が入り込んでいる事を特徴とする軸受キャップ。 With a metal ring made of a metal plate and a cap body made of synthetic resin,
The metal ring includes a fitting tubular portion that is internally fitted to one axial end portion of the outer diameter side bearing ring that constitutes the rolling bearing unit directly or via another member, and an axial one end portion of the fitting tubular portion. From, has an outward flange portion provided in a state of being bent outward in the radial direction, and a bent portion having an arc-shaped cross section that exists in a continuous portion of the fitting tubular portion and the outward flange portion,
The cap body includes a resin tubular portion that embeds at least the outward flange portion and the bent portion in the metal ring, and a resin whose outer peripheral portion is joined to an inner peripheral portion of one end portion in the axial direction of the resin tubular portion. Has a bottom plate portion,
A bearing cap,
The bent portion is provided with a through hole that is inclined in a direction outward in the radial direction toward the other side in the axial direction, and a part of the synthetic resin is inserted into the through hole. Bearing cap to be used. 前記樹脂底板部の軸方向他側面のうち、円周方向に関して前記透孔と同位相となる箇所に、放射方向に伸長するリブが設けられている
請求項１に記載した軸受キャップ。 The bearing cap according to claim 1, wherein a rib extending in the radial direction is provided on a portion of the other side surface in the axial direction of the resin bottom plate portion that is in the same phase as the through hole in the circumferential direction. 前記樹脂底板部の径方向外端部のうち、円周方向に関して前記透孔と同位相となる箇所に、径方向内側に隣接する部分に比べて軸方向の厚さ寸法が小さくなった狭窄部が設けられている
請求項１〜２のうちの何れか１項に記載した軸受キャップ。 In the radial outer end portion of the resin bottom plate portion, a narrowed portion having a smaller axial thickness than a portion adjacent inward in the radial direction, at a portion having the same phase as the through hole in the circumferential direction. The bearing cap according to claim 1, wherein the bearing cap is provided. 内周面に外輪軌道を有し、使用時にも回転しない外径側軌道輪と、
外周面に内輪軌道を有し、使用時に回転する内径側軌道輪と、
前記外輪軌道と前記内輪軌道との間に転動自在に設けられた複数個の転動体と、
前記外径側軌道輪の軸方向片端開口部に取り付けられた軸受キャップと、
を備えた転がり軸受ユニットであって、
前記軸受キャップが請求項１〜３のうちの何れか１項に記載した軸受キャップである事を特徴とする転がり軸受ユニット。 An outer ring raceway that has an outer ring raceway on the inner peripheral surface and does not rotate during use,
An inner ring raceway that has an inner ring raceway on the outer peripheral surface and that rotates during use,
A plurality of rolling elements provided rotatably between the outer ring raceway and the inner ring raceway,
A bearing cap attached to the axially one end opening of the outer diameter side race ring,
A rolling bearing unit having
A rolling bearing unit, wherein the bearing cap is the bearing cap according to any one of claims 1 to 3.
JP2016216868A 2016-11-07 2016-11-07 Bearing cap and rolling bearing unit Active JP6743658B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2016216868A JP6743658B2 (en) 2016-11-07 2016-11-07 Bearing cap and rolling bearing unit
CN201721437724.8U CN207634538U (en) 2016-11-07 2017-11-01 Bearing cap and roller bearing unit
DE202017106726.2U DE202017106726U1 (en) 2016-11-07 2017-11-07 Bearing cover and rolling bearing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016216868A JP6743658B2 (en) 2016-11-07 2016-11-07 Bearing cap and rolling bearing unit

Publications (3)

Publication Number Publication Date
JP2018076875A JP2018076875A (en) 2018-05-17
JP2018076875A5 JP2018076875A5 (en) 2019-08-08
JP6743658B2 true JP6743658B2 (en) 2020-08-19

Family

ID=60481328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016216868A Active JP6743658B2 (en) 2016-11-07 2016-11-07 Bearing cap and rolling bearing unit

Country Status (3)

Country Link
JP (1) JP6743658B2 (en)
CN (1) CN207634538U (en)
DE (1) DE202017106726U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3546774B1 (en) * 2018-03-26 2021-09-08 Nakanishi Metal Works Co., Ltd. Protective cover having sensor holder part, bearing device including the protective cover, and method for manufacturing the protective cover having the sensor holder part

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005009527A (en) 2003-06-17 2005-01-13 Ntn Corp Bearing device with built-in rotating speed sensor
JP4752643B2 (en) 2006-06-28 2011-08-17 日本精工株式会社 Hub unit bearing

Also Published As

Publication number Publication date
CN207634538U (en) 2018-07-20
DE202017106726U1 (en) 2017-11-15
JP2018076875A (en) 2018-05-17

Similar Documents

Publication Publication Date Title
CN102575714B (en) Be combined with the wheel bearing arrangement of speed detector
JP2009108876A (en) Bearing device for wheel with rotational speed detection device
CN100432673C (en) Sealing device and rotation detector
JP6743658B2 (en) Bearing cap and rolling bearing unit
JP4311091B2 (en) Rolling bearing unit for wheel support with rotational speed detector
JP2004354299A (en) Bearing device with built-in rotating speed sensor
KR102418776B1 (en) An impulse ring and a sensor- bearing unit comprising such impulse ring
JP6256122B2 (en) Rolling bearing unit with rotational speed detector
JP2013221549A (en) Wheel bearing device
JP6572776B2 (en) Bearing cap with sensor unit and rolling bearing unit
JP6349954B2 (en) Bearing unit with rotation speed detector
JP2017223276A (en) Hub unit bearing
JP5623592B2 (en) Sensor cap for wheel bearing device with rotation speed detection device, wheel bearing device with rotation speed detection device provided with the same, and method for manufacturing sensor cap for wheel bearing device with rotation speed detection device
JP2006275200A (en) Cover of rolling bearing device and rolling bearing device using this cover
JP2005030547A (en) Rolling bearing unit with rotational speed detecting device
JP6428281B2 (en) Bearing cap and rolling bearing unit
JP5021762B2 (en) Sensor device for measuring the rotational movement of a wheel bearing
JP6624248B2 (en) Bearing cap and rolling bearing unit
JP6848454B2 (en) Bearing caps and rolling bearings
JP4622185B2 (en) Encoder and rolling bearing unit with encoder
JP6375982B2 (en) Bearing cap and rolling bearing unit
JP6627577B2 (en) Rolling bearing unit for wheel support
US8096710B2 (en) Rotor for use in rotary encoder and wheel rolling bearing assembly including the same
JP2004354102A (en) Encoder, and rolling bearing unit having the same
JP2024007913A (en) hub unit bearing

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20190625

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190625

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20200623

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20200630

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200713

R150 Certificate of patent or registration of utility model

Ref document number: 6743658

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150