JP4013618B2

JP4013618B2 - Rolling bearing device

Info

Publication number: JP4013618B2
Application number: JP2002099821A
Authority: JP
Inventors: 俊一松井; 善紀増田
Original assignee: JTEKT Corp
Current assignee: JTEKT Corp
Priority date: 2002-04-02
Filing date: 2002-04-02
Publication date: 2007-11-28
Anticipated expiration: 2022-04-02
Also published as: JP2003291604A

Description

【０００１】
【発明の属する技術分野】
本発明は、転がり軸受装置に係り、特に車軸を支持するのに適した転がり軸受装置に関する。
【０００２】
【従来の技術】
図３を参照して従動輪側の車軸の支持用に用いられる転がり軸受装置の概略構成を説明する。この転がり軸受装置は、外輪部材５０と、複数の玉５１ａ，５１ｂと、内輪部材５２とを有する。外輪部材５０は、その内周面に軸方向２列で玉５１ａ，５１ｂ用の軌道面を有し車体側に非回転に支持される。内輪部材５２は、外周面に一方の玉５１ａの軌道面を有するハブ軸５３と、外周面に他方の玉５１ｂの軌道面を有し、かつハブ軸５３に外嵌される環状部材５４とを含むもので、外輪部材５０に対して径方向内側で同心に配置される。
【０００３】
ハブ軸５３は、熱間鍛造によって中実断面に形成されるものであり、軸部５５と、ハブフランジ５６と、環状ガイド部５７とを備える。ハブフランジ５６は、ブレーキディスクおよびタイヤホイールを重ねて取付けるため、軸部５５の車両アウタ側外周面の径方向外向きに設けられている。環状ガイド部５７は、インロー部とも称され、ハブフランジ５６より車両アウタ側方向に突出された環状構造を有する。この環状ガイド部５７は、ブレーキディスクおよびタイヤホイールをハブフランジ５６に重ねる際のガイドとなる。
【０００４】
【発明が解決しようとする課題】
上記転がり軸受装置のハブ軸５３の場合、熱間鍛造によって３方に張出す各部５５〜５７を一体に形成するために、大圧力を加えるためのプレス機など高価で大掛かりな製造設備が必要となる。特に熱間鍛造の場合、ハブ軸５３の製品精度を所要以上に確保しにくいために、鍛造後にハブ軸５３に対する旋削や研磨などの後加工が必要とされ製造工程数が増加し、製造コストも高くなる、などの不具合が指摘される。
【０００５】
【課題を解決するための手段】
本発明の請求項１に係る転がり軸受装置は、外輪部材と、この外輪部材と同心に配置される内輪部材と、前記両部材間に転動自在に介装される複数の転動体と、前記内輪部材に設けられるブレーキディスク取付用フランジと、このブレーキディスク取付用フランジにブレーキディスクを取付ける際にガイドとなるガイド部材とを含み、前記内輪部材は、軸方向に延びる円筒状の第１内輪部材と、前記ブレーキディスク取付用フランジを有する第２内輪部材とを有し、前記第１内輪部材は端部に、前記第２内輪部材の端面に対してかしめられるかしめ部を有し、前記ガイド部材は、ブレーキディスク取付用フランジよりも軸心方向に突出されてブレーキディスクを取付ける際のガイド部と、前記第１内輪部材の端部内周面に嵌込まれる嵌込部とを含み、かつ前記ガイド部材は、前記内輪部材および外輪部材とは別体構造とされている。
本発明の請求項２に係る転がり軸受装置は、外輪部材と、この外輪部材と同心に配置される内輪部材と、前記両部材間に転動自在に介装される複数の転動体と、前記外輪部材に設けられるブレーキディスク取付用フランジと、このブレーキディスク取付用フランジにブレーキディスクを取付ける際にガイドとなるガイド部材とを含み、前記外輪部材は、軸方向に延びる円筒状の第１外輪部材と、前記ブレーキディスク取付用フランジを有する第２外輪部材とを有し、前記第１外輪部材は端部に、前記第２外輪部材の端面に対してかしめられるかしめ部を有し、前記ガイド部材は、ブレーキディスク取付用フランジよりも軸心方向に突出されてブレーキディスクを取付ける際のガイド部と、前記第１外輪部材の端部内周面に嵌込まれる嵌込部とを含み、かつ前記ガイド部材は、前記内輪部材および外輪とは別体構造とされている。
【０００６】
上記構成のように、ブレーキディスク取付用フランジにブレーキディスクを取付ける際にガイドとなるガイド部材を、外輪部材および内輪部材とは別体で設けることにより、三方向に張出すような外輪部材または内輪部材を形成することを必要としなくなるため、外輪部材または内輪部材の少なくとも一方を冷間鍛造によって形成することができるようになる。これにより、転がり軸受装置の製造に際して、大掛かりな設備が不要となる。また冷間鍛造によれば、製品精度が高くなるため、転動体の軌道面を必要な精度とするための研磨加工時間を短縮することができる。このため、製品の製造が容易になるとともに、製造コストが低減される。
【０００７】
本発明の請求項３に係る転がり装置は、請求項１または請求項２に記載の転がり軸受装置であって、前記ガイド部材は、さらに前記ガイド部と前記嵌込部とを中継接続する中継部を有し、かつ、前記ガイド部材は前記中継部で前記かしめ部を覆う。
【０００８】
この構成においても、転がり軸受装置の製造に際して、大掛かりな設備が不要となる。またガイド部材を冷間鍛造によって形成することにより、熱間鍛造によってガイド部材を外輪部材または内輪部材と一体に形成する場合に比べて、ガイド部材の容量を小さくすることができ、この場合は回転トルクが低減される。
【００１１】
なお、外輪部材、内輪部材およびガイド部材を、例えば管状の素材から冷間鍛造によって形成することにより、製品の製造がいっそう容易になり、製造コストも低減される。
【００１２】
【発明の実施の形態】
以下、本発明の実施形態に係る転がり軸受装置を、図面を参照して説明する。図では、転がり軸受装置を、従動輪側の車軸用転がり軸受装置に適用させている。図1は本発明の実施形態に係る転がり軸受装置の全体構成を示す断面図、図２は転がり軸受装置の車両アウタ側からの側面図である。図示のように、この転がり軸受装置１は、外輪部材２と、転動体として２列の玉４，５と、内輪部材６とを有する。
【００１３】
外輪部材２は、熱間鍛造によって形成されるものである。この外輪部材２は、支持フランジ２０を有する。この支持フランジ２０は、外輪部材２の軸心方向途中位置に径方向外向きに突出して形成される。この支持フランジ２０が、不図示の車体側に組込まれるナックルに取付けられることで、外輪部材２が車体に対して軸心回りに非回転に支持される。外輪部材２の車両インナ側端部に、カバー２２が嵌着されている。このカバー２２は、不図示の車速センサーを内装する空間２１を確保するためのものである。各列の玉４，５は、それぞれ冠形保持器３によって円周方向等配位置に保持されている。
【００１４】
内輪部材６は、一方の内輪部材１１と他方の内輪部材１３とから構成される。一方の内輪部材１１は、その車両インナ側に、外周面を一方列の玉４の内輪軌道面とする軌道部７が形成されている。一方の内輪部材１１は、車両アウタ側に縮径部１４を有する。このような構成を有する一方の内輪部材１１は、管状の素材から冷間鍛造によって、図１に示すような軸方向断面形状を有する円筒状に形成されている。
【００１５】
他方の内輪部材１３は、外周面を他方側の玉５の内輪軌道面とする軌道部１２と、この軌道部１２から径方向外向きに突出して形成される、ブレーキディスク取付用フランジとしてのハブフランジ１０とを有する。他方の内輪部材１３は、その軌道部１２の中心に、一方の内輪部材１１の縮径部１４が嵌着する中心穴１２ａを有する。他方の内輪部材１３は、冷間鍛造によって管状またはリング状または平板状の素材から形成される。一方の内輪部材１１はまた、その車両アウタ側端部に、他方の内輪部材１３の端面に対してかしめられるかしめ部１３ａを有する。
【００１６】
ブレーキディスク８およびタイヤホイール９を、ハブフランジ１０に取付ける際にガイドとなるガイド部材２３が、かしめ部１３ａを覆うように設けられている。このガイド部材２３は、インロー部材とも称される部分であり、外輪部材２および内輪部材１１，１３とは別体構造とされている。
【００１７】
このガイド部材２３は、その中心に形成されるとともに、一方の内輪部材１１の内空部２４に圧入される円筒状嵌込部２５と、この円筒状嵌入部２５の端部から径方向外向きに拡径される、中継部としての平板部２６と、この平板部２６の径方向外側端部から車両インナ側に折曲される環状ガイド部２８とから一体的に形成される。
【００１８】
このガイド部材２３は、ガイド部２８の外周面を、ブレーキディスク８およびタイヤホイール９を取付ける際の取付用ガイド面２８ａとしている。そして円筒状嵌入部２５が、一方の内輪部材１１の内空部２４に圧入されている状態で、ガイド部２８は、ハブフランジ１０よりも軸心方向すなわち車両アウタ側に突出された状態となる。このような構成を備えるガイド部材２３は、平板状の素材から冷間鍛造によって形成される。
【００１９】
図の符号３０は、ハブボルトを示す。このハブボルト３０は、ハブフランジ１０の円周方向所定位置で、挿通孔２９に圧入されている。ブレーキディスク８およびタイヤホイール９は、それぞれ中央穴（符号省略）をガイド部材２３の環状ガイド部２８の外周面に沿うように、またハブボルト３０を盤面に挿通するようにして、ハブフランジ１０に対して図の仮想線で示すように重ねられる。ブレーキディスク８およびタイヤホイール９は、ハブボルト３０に不図示のナット部材を螺着することでハブフランジ１０に固定される。
【００２０】
転がり軸受装置１は、外輪部材２と他方の内輪部材１３との間の環状空間１５を、その車両アウタ側でシールするためのシール装置１６を有する。このシール装置１６は、外輪部材２の車両アウタ側端部内周面に嵌着される芯金と、この芯金に取付けられて他方の内輪部材１３の対向部分に接触するリップを有する弾性シール体とから構成されている。
【００２１】
上記構成の転がり軸受装置１の製造手順を説明する。まず、外輪部材２に各列の玉４，５を、冠形保持器３に保持させた状態で組付ける。続いて一方の内輪部材１１を車両インナ側から外輪部材２に挿入するように組付けるとともに、他方の内輪部材１３を車両アウタ側から組付ける。このとき、一方の内輪部材１１の縮径部１４が、他方の内輪部材１３の中心穴１２ａに対して円滑に挿通されるように、両内輪部材１１，１３を径方向位置で位置合わせする。一方の内輪部材１１の縮径部１４が、他方の内輪部材１３の中心穴１２ａに挿通された状態で、一方の内輪部材１１の端面を拡径するようにして他方の内輪部材１３の端面に対してかしめ、一方の内輪部材１１にかしめ部１３ａを形成する。このように、一方の内輪部材１１の端面を他方の内輪部材１３の端面に対してかしめることで、両内輪部材１１，１３が軸心回りに回転一体とされるとともに、両列の玉４，５に対して所定の予圧が付与される。
【００２２】
その後、ガイド部材２３の円筒状嵌入部２５を、一方の内輪部材１１の内空部２４に圧入するようにし、環状ガイド部２８が他方の内輪部材１３の車両アウタ側端面に当接するように、ガイド部材２３を一方の内輪部材１１に組付ける。その後外輪部材２は、支持フランジ２０を介して車体に組付けられるとともに、ハブフランジ１０に対してブレーキディスク８およびタイヤホイール９が取付けられる。
【００２３】
このように、ハブフランジ１０にブレーキディスク８およびタイヤホイール９を取付ける際、それらの中央穴をガイド部材２３のガイド部２８の外周面である取付用ガイド面２８ａにガイドさせるようにする。
【００２４】
このようにして製造した転がり軸受装置１では、車両が走行すると、不図示の車輪の回転とともに、内輪部材６、すなわち一方の内輪部材１１および他方の内輪部材１３が軸心回りに回転する。
【００２５】
ところで上記ガイド部材２３は、冷間鍛造によって、転がり軸受装置１を構成する他の構成部品とは別体として形成している。このため、少なくとも一方の内輪部材１１を、管状の素材を用いて円筒形状に形成できる。また、場合によっては、他方の内輪部材１３を冷間鍛造によって形成できる。このように、ガイド部材２３、一方の内輪部材１１、他方の内輪部材１３を冷間鍛造によって形成することで、図３で示した従来例のように、ハブ軸を熱間鍛造によって中実断面に形成する場合に比べて、転がり軸受装置１の全体の容量および重量を低減させることができる。これにより、従動輪として、回転トルクの低減が可能となる。
【００２６】
また、図３で示した従来例のように、ハブ軸を熱間鍛造によって中実断面に形成する場合に比べて、小規模で安価な製造設備であつても対応でき、しかも高精度に一方の内輪部材１１を形成することができる。すなわち熱間鍛造の場合は製品の表面精度も低く、特に玉４の内輪軌道面を必要な精度とするための研磨加工時間を長く必要とし、場合によっては内輪軌道面以外の部分も研磨加工を必要としていた。これに対して、管状の素材を用い、冷間鍛造によって一方の内輪部材１１を形成する場合は、材料コストも安価であり、また製品の精度がよいので、内輪軌道面を必要な精度とするための研磨加工時間が短縮でき、内輪軌道面以外の部分の研磨加工をほとんど必要としない。これによって、製造コストを大幅に低減し得ることになる。
【００２７】
また、ガイド部材２３は、一方の内輪部材１１のかしめ部１３ａのカバーの機能を有しているため、他方の内輪部材１３の端面とかしめ部１３ａの間から泥水等が侵入するのを防止する機能を有する。
【００２８】
本発明は上記実施形態に限定されるものではない。上記実施形態では、転がり軸受装置１として、内輪回転タイプの例を示し、ガイド部材２３を内輪部材１１に組付けるようにしている。しかし本発明は、外輪部材２にハブフランジ１０を有する外輪回転タイプの転がり軸受装置にも適用できる。この場合、ガイド部材２３は、外輪部材２の端部内周面に組付けるようにする。
【００２９】
何れの場合でも、ガイド部材２３を内輪部材１１，１３あるいは外輪部材２とは別体とすることで、少なくとも一方の内輪部材１１を、管状の素材を用いて冷間鍛造によって形成することができるようになり、回転トルクの低減を図り得るとともに、製造コストを大幅に低減し得る。
【００３０】
なお、上記各実施形態で、内輪部材１１，１３、外輪部材２、ガイド部材２３の素材となる管状またはリング状または平板状の各素材は、強度の許す限り薄肉とすることにより、軽量化、加工性および製造コストの点から優れたものとなる。
【００３１】
さらに、上記実施形態における転がり軸受装置１は、車両の従動輪側に用いた場合を示したが、これに限定されるものではなく、車両における駆動輪側に適用させることもできる。
【００３２】
【発明の効果】
以上の説明から明らかな通り、本発明によれば、高価で大掛かりな設備が不要となるばかりでなく、研磨加工あるいは旋削加工などの後加工時間を短縮もしくは省略でき、もって製造コストの低減を図り得る。
【図面の簡単な説明】
【図１】本発明の実施の形態に係る転がり軸受装置の全体断面図である。
【図２】同じく側面図である。
【図３】従来の転がり軸受装置の全体断面図である。
【符号の説明】
１転がり軸受装置
２外輪部材
１０ハブフランジ
１１一方の内輪部材
１３他方の内輪部材
１３ａかしめ部
２３ガイド部材
２５円筒状嵌入部
２６平板部
２８環状ガイド部
２４内空部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rolling bearing device, and more particularly to a rolling bearing device suitable for supporting an axle.
[0002]
[Prior art]
A schematic configuration of a rolling bearing device used for supporting the axle on the driven wheel side will be described with reference to FIG. This rolling bearing device has an outer ring member 50, a plurality of balls 51 a and 51 b, and an inner ring member 52. The outer ring member 50 has raceways for the balls 51a and 51b in two rows in the axial direction on the inner peripheral surface thereof, and is supported non-rotatingly on the vehicle body side. The inner ring member 52 includes a hub shaft 53 having a raceway surface of one ball 51 a on the outer peripheral surface, and an annular member 54 having a raceway surface of the other ball 51 b on the outer peripheral surface and fitted on the hub shaft 53. It is included and is arranged concentrically on the radially inner side with respect to the outer ring member 50.
[0003]
The hub shaft 53 is formed in a solid cross section by hot forging, and includes a shaft portion 55, a hub flange 56, and an annular guide portion 57. The hub flange 56 is provided outward in the radial direction of the outer peripheral surface of the shaft portion 55 on the vehicle outer side in order to attach the brake disc and the tire wheel in a stacked manner. The annular guide portion 57 is also referred to as an inlay portion, and has an annular structure that protrudes from the hub flange 56 in the vehicle outer side direction. The annular guide portion 57 serves as a guide when the brake disc and the tire wheel are stacked on the hub flange 56.
[0004]
[Problems to be solved by the invention]
In the case of the hub shaft 53 of the rolling bearing device, an expensive and large-scale manufacturing facility such as a press machine for applying a large pressure is required to integrally form the portions 55 to 57 extending in three directions by hot forging. Become. Particularly in the case of hot forging, since it is difficult to ensure the product accuracy of the hub shaft 53 more than necessary, post-processing such as turning and polishing of the hub shaft 53 is required after forging, which increases the number of manufacturing processes and the manufacturing cost. Problems such as higher prices are pointed out.
[0005]
[Means for Solving the Problems]
A rolling bearing device according to claim 1 of the present invention includes an outer ring member, an inner ring member disposed on the outer ring member concentrically, and a plurality of rolling elements rollably interposed between the two members, the A brake disk mounting flange provided on the inner ring member , and a guide member that serves as a guide when the brake disk is attached to the brake disk mounting flange, the inner ring member is a cylindrical first inner ring member extending in the axial direction. And a second inner ring member having the brake disk mounting flange, wherein the first inner ring member has a caulking portion that is caulked to an end surface of the second inner ring member at the end, and the guide member It includes a fitting portion to be written fitting a guide part for attaching the brake disc protrudes in the axial direction than the flange brake disc attached to the inner peripheral surface of an end portion of the first inner ring member Wherein, and wherein the guide member is a separate structure from said inner member and the outer ring member.
A rolling bearing device according to a second aspect of the present invention includes an outer ring member, an inner ring member disposed concentrically with the outer ring member, a plurality of rolling elements interposed between the two members so as to be freely rollable, A brake disk mounting flange provided on the outer ring member, and a guide member that serves as a guide when the brake disk is attached to the brake disk mounting flange, the outer ring member being a cylindrical first outer ring member extending in the axial direction And a second outer ring member having the brake disk mounting flange, wherein the first outer ring member has a caulking portion that is caulked against an end surface of the second outer ring member at the end, and the guide member Is a guide portion that is projected in the axial direction from the flange for mounting the brake disc to attach the brake disc, and a fitting portion that is fitted into the inner peripheral surface of the end portion of the first outer ring member, Wherein, and wherein the guide member is a separate structure from said inner member and the outer ring.
[0006]
As described above, an outer ring member or an inner ring that protrudes in three directions by providing a guide member that serves as a guide when the brake disk is attached to the brake disk mounting flange separately from the outer ring member and the inner ring member. Since it becomes unnecessary to form the member, at least one of the outer ring member and the inner ring member can be formed by cold forging. This eliminates the need for large facilities when manufacturing the rolling bearing device. Further, according to cold forging, the product accuracy is increased, and therefore the polishing time for making the raceway surface of the rolling element necessary accuracy can be shortened. For this reason, manufacture of a product becomes easy and manufacturing cost is reduced.
[0007]
A rolling device according to a third aspect of the present invention is the rolling bearing device according to the first or second aspect, wherein the guide member further relays and connects the guide portion and the fitting portion. And the guide member covers the caulking portion with the relay portion.
[0008]
This configuration also eliminates the need for large facilities when manufacturing the rolling bearing device. Also, by forming the guide member by cold forging, the capacity of the guide member can be reduced compared with the case where the guide member is integrally formed with the outer ring member or the inner ring member by hot forging. Torque is reduced.
[0011]
In addition, by forming the outer ring member, the inner ring member, and the guide member from, for example, a tubular material by cold forging, the manufacture of the product becomes easier and the manufacturing cost is reduced.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a rolling bearing device according to an embodiment of the present invention will be described with reference to the drawings. In the figure, the rolling bearing device is applied to an axle rolling bearing device on the driven wheel side. FIG. 1 is a cross-sectional view showing the overall configuration of a rolling bearing device according to an embodiment of the present invention, and FIG. 2 is a side view of the rolling bearing device from the vehicle outer side. As illustrated, the rolling bearing device 1 includes an outer ring member 2, two rows of balls 4 and 5 as rolling elements, and an inner ring member 6.
[0013]
The outer ring member 2 is formed by hot forging. The outer ring member 2 has a support flange 20. The support flange 20 is formed to protrude radially outward at a position in the axial direction of the outer ring member 2. By attaching the support flange 20 to a knuckle incorporated on the vehicle body side (not shown), the outer ring member 2 is supported non-rotatingly around the axis with respect to the vehicle body. A cover 22 is fitted to the vehicle inner side end of the outer ring member 2. The cover 22 is for securing a space 21 in which a vehicle speed sensor (not shown) is installed. The balls 4 and 5 in each row are respectively held at equidistant positions in the circumferential direction by the crown-shaped cage 3.
[0014]
The inner ring member 6 includes one inner ring member 11 and the other inner ring member 13. One inner ring member 11 is formed with a track portion 7 having an outer peripheral surface as an inner ring raceway surface of the balls 4 in one row on the vehicle inner side. One inner ring member 11 has a reduced diameter portion 14 on the vehicle outer side. One inner ring member 11 having such a configuration is formed into a cylindrical shape having an axial sectional shape as shown in FIG. 1 by cold forging from a tubular material.
[0015]
The other inner ring member 13 includes a raceway portion 12 having an outer peripheral surface as an inner raceway surface of the ball 5 on the other side, and a hub as a brake disk mounting flange formed to project radially outward from the raceway portion 12. And a flange 10. The other inner ring member 13 has a center hole 12 a in the center of the track portion 12 in which the reduced diameter portion 14 of the one inner ring member 11 is fitted. The other inner ring member 13 is formed from a tubular, ring-shaped or flat plate-shaped material by cold forging. One inner ring member 11 also has a caulking portion 13 a that is caulked against an end surface of the other inner ring member 13 at an end portion on the vehicle outer side.
[0016]
A guide member 23 serving as a guide when the brake disc 8 and the tire wheel 9 are attached to the hub flange 10 is provided so as to cover the caulking portion 13a. The guide member 23 is a portion also referred to as an inlay member, and has a separate structure from the outer ring member 2 and the inner ring members 11 and 13.
[0017]
The guide member 23 is formed at the center thereof, and has a cylindrical fitting portion 25 that is press-fitted into the inner space portion 24 of one inner ring member 11, and radially outward from an end portion of the cylindrical fitting portion 25. Are formed integrally from a flat plate portion 26 serving as a relay portion and an annular guide portion 28 that is bent from the radially outer end of the flat plate portion 26 toward the vehicle inner side.
[0018]
The guide member 23 has an outer peripheral surface of the guide portion 28 as a guide surface 28a for attachment when the brake disc 8 and the tire wheel 9 are attached. And the guide part 28 will be in the state protruded from the hub flange 10 to the axial direction, ie, a vehicle outer side, in the state in which the cylindrical insertion part 25 is press-fit in the inner space part 24 of one inner ring member 11. . The guide member 23 having such a configuration is formed from a flat material by cold forging.
[0019]
Reference numeral 30 in the figure denotes a hub bolt. The hub bolt 30 is press-fitted into the insertion hole 29 at a predetermined position in the circumferential direction of the hub flange 10. The brake disc 8 and the tire wheel 9 are respectively connected to the hub flange 10 so that the center hole (not shown) is along the outer peripheral surface of the annular guide portion 28 of the guide member 23 and the hub bolt 30 is inserted through the board surface. Are overlaid as shown by the phantom lines in the figure. The brake disc 8 and the tire wheel 9 are fixed to the hub flange 10 by screwing a nut member (not shown) to the hub bolt 30.
[0020]
The rolling bearing device 1 has a sealing device 16 for sealing the annular space 15 between the outer ring member 2 and the other inner ring member 13 on the vehicle outer side. The sealing device 16 is an elastic seal body having a core metal fitted to the inner peripheral surface of the outer side end portion of the outer ring member 2 and a lip attached to the core metal and contacting a facing portion of the other inner ring member 13. It consists of and.
[0021]
A manufacturing procedure of the rolling bearing device 1 having the above-described configuration will be described. First, the balls 4 and 5 in each row are assembled to the outer ring member 2 while being held by the crown-shaped cage 3. Subsequently, one inner ring member 11 is assembled so as to be inserted into the outer ring member 2 from the vehicle inner side, and the other inner ring member 13 is assembled from the vehicle outer side. At this time, the inner ring members 11 and 13 are aligned at the radial position so that the reduced diameter portion 14 of one inner ring member 11 is smoothly inserted into the center hole 12a of the other inner ring member 13. In a state where the reduced diameter portion 14 of one inner ring member 11 is inserted into the center hole 12a of the other inner ring member 13, the end surface of the one inner ring member 11 is expanded on the end surface of the other inner ring member 13. The caulking portion 13a is formed on one inner ring member 11 by caulking. Thus, by caulking the end face of one inner ring member 11 with respect to the end face of the other inner ring member 13, both inner ring members 11 and 13 are rotated and integrated around the axis, and the balls 4 in both rows are aligned. , 5 is given a predetermined preload.
[0022]
Thereafter, the cylindrical fitting portion 25 of the guide member 23 is press-fitted into the inner space portion 24 of one inner ring member 11, and the annular guide portion 28 is in contact with the vehicle outer side end surface of the other inner ring member 13. The guide member 23 is assembled to one inner ring member 11. Thereafter, the outer ring member 2 is assembled to the vehicle body via the support flange 20, and the brake disc 8 and the tire wheel 9 are attached to the hub flange 10.
[0023]
As described above, when the brake disc 8 and the tire wheel 9 are attached to the hub flange 10, the center hole thereof is guided to the mounting guide surface 28 a that is the outer peripheral surface of the guide portion 28 of the guide member 23.
[0024]
In the rolling bearing device 1 manufactured as described above, when the vehicle travels, the inner ring member 6, that is, the one inner ring member 11 and the other inner ring member 13 rotate around the axis as the wheels (not shown) rotate.
[0025]
By the way, the guide member 23 is formed as a separate body from the other components constituting the rolling bearing device 1 by cold forging. For this reason, at least one inner ring member 11 can be formed in a cylindrical shape using a tubular material. In some cases, the other inner ring member 13 can be formed by cold forging. Thus, by forming the guide member 23, the one inner ring member 11, and the other inner ring member 13 by cold forging, the hub shaft is solid-shaped by hot forging as in the conventional example shown in FIG. Compared with the case where it forms, the whole capacity | capacitance and weight of the rolling bearing apparatus 1 can be reduced. As a result, the rotational torque can be reduced as the driven wheel.
[0026]
Further, as in the conventional example shown in FIG. 3, compared with the case where the hub shaft is formed in a solid cross section by hot forging, even a small-scale and inexpensive manufacturing facility can cope with it, and at the same time, with high accuracy. The inner ring member 11 can be formed. In other words, in the case of hot forging, the surface accuracy of the product is low, and in particular, a long polishing time is required to make the inner ring raceway surface of the balls 4 necessary accuracy, and in some cases, the portions other than the inner ring raceway surface are also polished. I needed it. On the other hand, when one inner ring member 11 is formed by cold forging using a tubular material, the material cost is low and the accuracy of the product is good, so that the inner ring raceway surface has the necessary accuracy. Therefore, it is possible to shorten the polishing process time and hardly require the polishing process for parts other than the inner ring raceway surface. As a result, the manufacturing cost can be greatly reduced.
[0027]
Further, since the guide member 23 functions as a cover for the caulking portion 13a of one inner ring member 11, muddy water or the like is prevented from entering between the end surface of the other inner ring member 13 and the caulking portion 13a. It has a function.
[0028]
The present invention is not limited to the above embodiment. In the said embodiment, the example of an inner ring | wheel rotation type is shown as the rolling bearing apparatus 1, and the guide member 23 is assembled | attached to the inner ring member 11. FIG. However, the present invention can also be applied to an outer ring rotation type rolling bearing device in which the outer ring member 2 has the hub flange 10. In this case, the guide member 23 is assembled to the inner peripheral surface of the end portion of the outer ring member 2.
[0029]
In any case, by making the guide member 23 separate from the inner ring members 11, 13 or the outer ring member 2, at least one inner ring member 11 can be formed by cold forging using a tubular material. Thus, the rotational torque can be reduced and the manufacturing cost can be greatly reduced.
[0030]
In each of the above embodiments, the inner ring members 11 and 13, the outer ring member 2, and the tubular or ring-shaped or plate-shaped material used as the material of the guide member 23 are reduced in weight by reducing the thickness as long as the strength permits. It is excellent in terms of workability and manufacturing cost.
[0031]
Furthermore, although the rolling bearing device 1 in the said embodiment showed the case where it used on the driven wheel side of a vehicle, it is not limited to this, It can also be made to apply to the drive wheel side in a vehicle.
[0032]
【The invention's effect】
As is apparent from the above description, according to the present invention, not only is expensive and large-scale equipment unnecessary, but post-processing time such as polishing or turning can be shortened or omitted, thereby reducing the manufacturing cost. obtain.
[Brief description of the drawings]
FIG. 1 is an overall cross-sectional view of a rolling bearing device according to an embodiment of the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is an overall sectional view of a conventional rolling bearing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rolling bearing apparatus 2 Outer ring member 10 Hub flange 11 One inner ring member 13 The other inner ring member 13a Caulking part 23 Guide member 25 Cylindrical insertion part 26 Flat plate part 28 Annular guide part 24 Inner space part

Claims

An outer ring member, an inner ring member disposed concentrically with the outer ring member, a plurality of rolling elements interposed between the two members so as to freely roll, a brake disk mounting flange provided on the inner ring member , Including a guide member that serves as a guide when the brake disk is attached to the brake disk mounting flange,
The inner ring member includes a cylindrical first inner ring member extending in the axial direction, and a second inner ring member having the brake disk mounting flange.
The first inner ring member has a caulking portion that is caulked with respect to an end surface of the second inner ring member at an end portion;
The guide member includes a guide portion that is projected in the axial direction from the brake disc mounting flange and is attached to the brake disc, and a fitting portion that is fitted to the inner peripheral surface of the end portion of the first inner ring member , In addition, the rolling bearing device is characterized in that the guide member has a separate structure from the inner ring member and the outer ring member.

An outer ring member, an inner ring member arranged concentrically with the outer ring member, a plurality of rolling elements interposed between the two members so as to freely roll, a brake disk mounting flange provided on the outer ring member, Including a guide member that serves as a guide when the brake disk is attached to the brake disk mounting flange,
The outer ring member has a cylindrical first outer ring member extending in the axial direction, and a second outer ring member having the brake disk mounting flange,
The first outer ring member has a caulking portion that is caulked against an end surface of the second outer ring member at an end portion;
The guide member includes a guide portion that is projected in the axial direction from the brake disc mounting flange and is attached to the brake disc, and a fitting portion that is fitted into the inner peripheral surface of the end portion of the first outer ring member, The rolling bearing device is characterized in that the guide member has a separate structure from the inner ring member and the outer ring .

The rolling bearing device according to claim 1 or 2, wherein
The rolling bearing device according to claim 1 , wherein the guide member further includes a relay portion that relay-connects the guide portion and the fitting portion, and the guide member covers the caulking portion with the relay portion .