JP2005240942A

JP2005240942A - Bearing device for drive pulley and machining method thereof

Info

Publication number: JP2005240942A
Application number: JP2004053601A
Authority: JP
Inventors: Shoko Yasumura; 昌紘安村; Akifumi Horiie; 章史堀家
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2004-02-27
Filing date: 2004-02-27
Publication date: 2005-09-08

Abstract

<P>PROBLEM TO BE SOLVED: To easily and smoothly assembly a constant velocity universal joint by preventing the diameter of the inner end section of a hub (first inner member) from shrinking. <P>SOLUTION: When assembling a hub unit, an inner ring (second inner member) 12 is forced into a small-diameter step section 15 of the hub (first inner member) 8. Then, the inner periphery surface of an axial hole 11 of the hub (first inner member) 8 is subjected to broach machining, thus forming an internal serration section 10 extended axially as a finished product. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、自動車の駆動車輪(ＦＲ車の後輪、ＦＦ車の前輪、４ＷＤ車の全輪)を懸架装置に対して回転自在に支持する駆動車輪用軸受装置及びその加工方法に関する。 The present invention relates to a drive wheel bearing device that rotatably supports a drive wheel of an automobile (a rear wheel of an FR vehicle, a front wheel of an FF vehicle, and all wheels of a 4WD vehicle) with respect to a suspension device, and a processing method thereof.

駆動輪用ハブユニットに於いては、ハブユニットは、軸受の外輪（外方部材）の内径側に、複数個の転動体を介して、ハブ及び内輪（第１及び第２内側部材）を回転自在に支持している。 In the drive wheel hub unit, the hub unit rotates the hub and the inner ring (first and second inner members) via a plurality of rolling elements on the inner diameter side of the outer ring (outer member) of the bearing. Supports freely.

外輪（外方部材）は、その外周面に設けた支持フランジにより、懸架装置を構成するナックルに固定してある。外輪（外方部材）の内周面には、複列の外輪軌道（アウターレース）が設けてあり、この外輪（外方部材）の内径側に、ハブ及び内輪（第１及び第２内側部材）を支持している。 The outer ring (outer member) is fixed to a knuckle constituting the suspension device by a support flange provided on the outer peripheral surface thereof. A double row outer ring raceway (outer race) is provided on the inner peripheral surface of the outer ring (outer member), and a hub and an inner ring (first and second inner members) are provided on the inner diameter side of the outer ring (outer member). ).

ハブ（第１内側部材）には、その外端部に、駆動輪を取り付けるための取付フランジが設けてある。ハブ（第１内側部材）の外周面の中間部には、第１内輪軌道（第１インナーレース）が形成してあり、ハブ（第１内側部材）の内端部の小径段部には、内輪（第２内側部材）が外嵌固定してある。 The hub (first inner member) is provided with a mounting flange for mounting the drive wheel at the outer end thereof. A first inner ring raceway (first inner race) is formed in an intermediate portion of the outer peripheral surface of the hub (first inner member), and a small diameter step portion at the inner end of the hub (first inner member) An inner ring (second inner member) is fitted and fixed.

この内輪（第２内側部材）には、第２内輪軌道（第２インナーレース）が形成してある。駆動輪用のハブユニットでは、ハブ（第１内側部材）の中心部には、等速ジョイントの雄セレーション部をセレーション嵌合して固定するための雌セレーション部が設けてある。 The inner ring (second inner member) is formed with a second inner ring raceway (second inner race). In the hub unit for driving wheels, a female serration portion for serration fitting and fixing the male serration portion of the constant velocity joint is provided at the center portion of the hub (first inner member).

自動車の駆動車輪用軸受装置（駆動輪用ハブユニット）の従来例を、図２２乃至図２５に示す。 Conventional examples of drive wheel bearing devices (drive wheel hub units) for automobiles are shown in FIGS.

図２２は、従来例に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。図２３は、従来例に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。図２４は、従来例に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。図２５は、従来例に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。 FIG. 22 is a cross-sectional view of a main part of a drive wheel bearing device according to a conventional example, and is a diagram of a first assembly process of a hub unit. FIG. 23 is a cross-sectional view of a main part of a drive wheel bearing device according to a conventional example, and is a diagram of a second assembly process of the hub unit. FIG. 24 is a cross-sectional view of the main part of the drive wheel bearing device according to the conventional example, and is a diagram of a third assembly process of the hub unit. FIG. 25 is a cross-sectional view of the main part of the drive wheel bearing device according to the prior art, and is a diagram of the fourth assembly process of the hub unit.

図２２に示すように、ハブ（第１内側部材）８の軸方向孔１１の内周面に、予めブローチ加工を施して、図２３に示すように、雌セレーション部１０を形成する。 As shown in FIG. 22, broaching is performed in advance on the inner peripheral surface of the axial hole 11 of the hub (first inner member) 8 to form a female serration portion 10 as shown in FIG. 23.

次いで、図２４に示すように、ハブ（第１内側部材）８の外周に、転動体（ボール）１８を介して、外輪（外方部材）６を嵌合する。次いで、ハブ（第１内側部材）８の端部外周面の小径段部に、内輪（第２内側部材）１２を外嵌・圧入して固定する。これにより、図２５に示すように、駆動車輪用軸受装置（駆動輪用ハブユニット）５が完成する。 Next, as shown in FIG. 24, an outer ring (outer member) 6 is fitted to the outer periphery of the hub (first inner member) 8 via rolling elements (balls) 18. Next, an inner ring (second inner member) 12 is externally fitted and press-fitted into the small diameter step portion of the outer peripheral surface of the end portion of the hub (first inner member) 8 and fixed. As a result, as shown in FIG. 25, the drive wheel bearing device (drive wheel hub unit) 5 is completed.

完成した駆動車輪用軸受装置（駆動輪用ハブユニット）５では、図２５に示すように、外輪（外方部材）６の内径側に、複数個のボール（転動体）１８を介して、ハブ（第１内側部材）８及び内輪（第２内側部材）１２が回転自在に支持してある。 In the completed drive wheel bearing device (drive wheel hub unit) 5, as shown in FIG. 25, a hub is provided on the inner diameter side of the outer ring (outer member) 6 via a plurality of balls (rolling elements) 18. (First inner member) 8 and inner ring (second inner member) 12 are rotatably supported.

外輪（外方部材）６は、その外周面に設けた支持フランジを介してボルト７により、懸架装置を構成するナックルに結合固定してある。 The outer ring (outer member) 6 is coupled and fixed to a knuckle that constitutes a suspension device with a bolt 7 via a support flange provided on the outer peripheral surface thereof.

外輪（外方部材）６の内周面には、複列の外輪軌道（アウターレース）６ａ，６ａが設けてあり、この外輪（外方部材）６の内径側に、ハブ（第１内側部材）８及び内輪（第２内側部材）１２を支持している。 Double rows of outer ring raceways (outer races) 6a, 6a are provided on the inner peripheral surface of the outer ring (outer member) 6, and a hub (first inner member) is provided on the inner diameter side of the outer ring (outer member) 6. ) 8 and the inner ring (second inner member) 12 are supported.

ハブ（第１内側部材）８には、取付け時に車体の外側に位置する外端部分外周に、車輪のホイール１等を取り付けるための取付フランジ１３が設けてある。即ち、取付フランジ１３の外周部には、円周方向に等間隔に複数個のハブボルト孔１４を備え、ハブボルト９により、車輪のホイール１等を取り付けるようになっている。 The hub (first inner member) 8 is provided with a mounting flange 13 for mounting the wheel 1 and the like of the wheel on the outer periphery of the outer end portion located outside the vehicle body at the time of mounting. That is, a plurality of hub bolt holes 14 are provided at equal intervals in the circumferential direction on the outer peripheral portion of the mounting flange 13, and the wheel 1 or the like of the wheel is attached by the hub bolt 9.

ハブ（第１内側部材）８の外周面の中間部に、第１内輪軌道（第１インナーレース）８ａが形成してあり、同じく内端部に形成した円筒状の小径段部１５には、内輪（第２内側部材）１２が外嵌固定してある。この内輪（第２内側部材）１２には、第２内輪軌道（第２インナーレース）１２ａが形成してある。なお、小径段部１５は、機械加工により形成してある。 A first inner ring raceway (first inner race) 8a is formed at an intermediate portion of the outer peripheral surface of the hub (first inner member) 8, and a cylindrical small-diameter step portion 15 similarly formed at the inner end portion includes: An inner ring (second inner member) 12 is fitted and fixed. The inner ring (second inner member) 12 is formed with a second inner ring raceway (second inner race) 12a. The small diameter step 15 is formed by machining.

ハブ（第１内側部材）８の軸方向孔１１には、雌スプライン部１０が形成してある。この雌スプライン部１０には、等速ジョイント（等速自在継手）の外側継手部材（雄スプライン軸）をスプライン嵌合して固定するようになっている。なお、複数個のボール（転動体）１８は、ケージ（保持器）１９により保持するように構成してある。 A female spline portion 10 is formed in the axial hole 11 of the hub (first inner member) 8. An outer joint member (male spline shaft) of a constant velocity joint (constant velocity universal joint) is fixed to the female spline portion 10 by spline fitting. The plurality of balls (rolling elements) 18 are configured to be held by a cage (cage) 19.

以上のように、図２２乃至図２５の従来例では、駆動車輪用軸受装置（駆動輪用ハブユニット）５をユニット化して、コンパクト化や軽量化を図っている。 As described above, in the conventional example shown in FIGS. 22 to 25, the drive wheel bearing device (drive wheel hub unit) 5 is unitized to reduce the size and weight.

また、内輪（第２内側部材）１２を圧入した後に、ハブ（第１内側部材）８の内端部を加締め加工（塑性加工）するタイプもあり、この場合には、軸受内部の予圧管理を行うことができる。 There is also a type in which the inner end of the hub (first inner member) 8 is crimped (plastically processed) after the inner ring (second inner member) 12 is press-fitted. In this case, preload management inside the bearing is performed. It can be performed.

さらに、駆動輪用ハブユニットの車体への装着時には、ハブ（第１内側部材）８の雌セレーション部１０に、セレーション歯部同士の噛み合いによりトルクを伝達する等速自在継手の外側継手部材（雄セレーション部）を嵌合するようになっている。 Further, when the drive wheel hub unit is mounted on the vehicle body, the outer joint member (male) of the constant velocity universal joint that transmits torque to the female serration portion 10 of the hub (first inner member) 8 by meshing of the serration teeth portions. Serration part) is fitted.

なお、特許文献１では、ハブの軸方向孔の内周面に雌スプライン部を形成する際に、ハブの内端部の小径段部に、内輪が予め外嵌してあり、この状態で、雌スプライン部の加工を行い、これにより、ハブの内端部の弾性変形分を補償することができるように構成してある。 In Patent Document 1, when the female spline portion is formed on the inner peripheral surface of the axial hole of the hub, the inner ring is preliminarily fitted on the small diameter step portion of the inner end portion of the hub, and in this state, The female spline portion is processed so that the elastic deformation of the inner end portion of the hub can be compensated.

また、特許文献２では、ハブの内端部を加締め加工する際、このハブの内端部に、変形防止治具を予め挿入し、その後に、加締め加工を施し、これにより、ハブの内端部の径方向内方への変形を防止することができるように構成してある。
特開２００２−３１７８２４号公報特開２００２−３３９９５９号公報 Further, in Patent Document 2, when the inner end portion of the hub is caulked, a deformation preventing jig is inserted in advance into the inner end portion of the hub, and then the caulking process is performed. The inner end portion can be prevented from being deformed inward in the radial direction.
JP 2002-317824 A JP 2002-339959 A

しかしながら、図２２乃至図２５に示した従来例に係る駆動車輪用軸受装置の構造では、ハブ（第１内側部材）８の外周に内輪（第２内側部材）１２を圧入する際には、図２４に示すように、ハブ（第１内側部材）８の外径寸法φＡと、内輪（第２内側部材）１２の内径寸法φＢと間には、締め代を設ける必要がある。 However, in the structure of the drive wheel bearing device according to the conventional example shown in FIGS. 22 to 25, when the inner ring (second inner member) 12 is press-fitted into the outer periphery of the hub (first inner member) 8, As shown in FIG. 24, it is necessary to provide a fastening allowance between the outer diameter dimension φA of the hub (first inner member) 8 and the inner diameter dimension φB of the inner ring (second inner member) 12.

従って、上記の圧入によって、ハブ（第１内側部材）８の内端部、特に、圧入部近傍３０の内周部３１が縮径してしまうといったことがある。 Therefore, the inner end portion of the hub (first inner member) 8, particularly the inner peripheral portion 31 in the vicinity of the press-fit portion 30 may be reduced in diameter by the press-fitting.

この縮径量は、図２５に示すように、△Ｘとすると、内周部３１の寸法は、φ(Ｄ−２△Ｘ)となる。そうすると、ハブ（第１内側部材）８の内周部３１に設けられた雌セレーション部１０のオーバーピン径も、同様に、縮径してしまうことになる。 As shown in FIG. 25, when the diameter reduction is ΔX, the dimension of the inner peripheral portion 31 is φ (D−2ΔX). If it does so, the diameter of the overpin of the female serration part 10 provided in the inner peripheral part 31 of the hub (1st inner member) 8 will be similarly reduced.

その結果、ハブ（第１内側部材）８のオーバーピン径に対して、等速自在継手の雄セレーション部のオーバーピン径の方が大きくなり、締め代を持ってしまうことになる。 As a result, the overpin diameter of the male serration portion of the constant velocity universal joint is larger than the overpin diameter of the hub (first inner member) 8, which causes a tightening margin.

最悪の場合は、ハブ（第１内側部材）８の雌セレーション部１０に、等速自在継手の雄セレーション部を挿入することができないといった虞れがある。 In the worst case, there is a possibility that the male serration portion of the constant velocity universal joint cannot be inserted into the female serration portion 10 of the hub (first inner member) 8.

本発明は、上述したような事情に鑑みてなされたものであって、ハブ（第１内側部材）の内端部の縮径を防止して、等速自在継手の組付けを容易に且つスムーズに行うことができる駆動車輪用軸受装置及びその加工方法を提供することを目的とする。 The present invention has been made in view of the circumstances described above, and prevents the inner end portion of the hub (first inner member) from being reduced in diameter so that the constant velocity universal joint can be easily and smoothly assembled. It is an object of the present invention to provide a drive wheel bearing device and a processing method thereof.

上記の目的を達成するため、本発明の請求項１に係る駆動車輪用軸受装置は、内周に複列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレーズのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材に第２内側部材が圧入された状態で結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置において、
第２内側部材を第１内側部材に圧入した後に、第１内側部材の内周に軸方向に延びるセレーションを形成するためのブローチ加工を施し、完成品としたことを特徴とする。 In order to achieve the above object, a drive wheel bearing device according to claim 1 of the present invention includes an outer member having a double row outer race on the inner periphery and a double row inner race facing the outer race of the outer member. A first inner member and a second inner member forming at least one of the double row inner raises, and an inner member coupled with the second inner member press-fitted to the first inner member, and an outer side Via a torque transmission means for transmitting torque by meshing teeth of serrations extending in the axial direction on the inner periphery of the first inner member, and the like. In the drive wheel bearing device in which the outer joint member of the speed universal joint is press-fitted,
After the second inner member is press-fitted into the first inner member, a broaching process for forming serrations extending in the axial direction is performed on the inner periphery of the first inner member to obtain a finished product.

本発明の請求項２に係る駆動車輪用軸受装置は、内周に複列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレーズのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材に第２内側部材が圧入された状態で結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置において、
予めブローチ加工を施した第１内側部材に第２内側部材を圧入した後に、第１内側部材の内周に軸方向に延びるセレーションに対して再度ブローチ加工を施し、完成品としたことを特徴とする。 A bearing device for a drive wheel according to claim 2 of the present invention includes an outer member having a double-row outer race on the inner periphery, a double-row inner race facing the outer race of the outer member, a first inner member, and a double-row outer race. A second inner member formed with at least one of the inner raises of the row, and an inner member coupled with the second inner member press-fitted to the first inner member; and between the outer member and the inner member An outer joint member of a constant velocity universal joint via a torque transmission means for transmitting torque by meshing teeth of serrations extending in the axial direction on the inner periphery of the first inner member. In the press-fitted drive wheel bearing device,
After the second inner member is press-fitted into the first inner member that has been broached in advance, the serration extending in the axial direction on the inner periphery of the first inner member is again broached to obtain a finished product. To do.

本発明の請求項３に係る駆動車輪用軸受装置は、内周に後列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレースのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材の端部を外径側に加締めてできたフランジ状の加締め部で第１内側部材と第２内側部材とを非分離に結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置において、
第２内側部材を第１内側部材に圧入した後に第１内側部材の内周に軸方向に延びるセレーションを形成するためのブローチ加工を施し、次に、加締めることを特徴とする。 A drive wheel bearing device according to a third aspect of the present invention includes an outer member having a rear row outer race on the inner periphery, a double row inner race facing the outer race of the outer member, a first inner member, and a double row A second inner member formed with at least one of the inner races, and a flange-like caulking portion formed by crimping an end of the first inner member to the outer diameter side. Serration portion of serration extending in the axial direction on the inner circumference of the first inner member, comprising an inner member that is non-separably coupled to the member and a double row rolling element interposed between the outer member and the inner member In the drive wheel bearing device in which the outer joint member of the constant velocity universal joint is press-fitted through a torque transmission means that transmits torque by meshing with each other.
After the second inner member is press-fitted into the first inner member, broaching for forming a serration extending in the axial direction is performed on the inner periphery of the first inner member, and then crimping is performed.

本発明の請求項４に係る駆動車輪用軸受装置は、内周に後列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレースのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材の端部を外径側に加締めてできたフランジ状の加締め部で第１内側部材と第２内側部材とを非分離に結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置において、
予めブローチ加工を施した第１内側部材に第２内側部材を圧入した後に、第１内側部材の内周に軸方向に延びるセレーションに対して再度ブロ−チ加工を施し、次に、加締めることを特徴とする。 A drive wheel bearing device according to a fourth aspect of the present invention includes an outer member having a rear row outer race on the inner periphery, a double row inner race facing the outer race of the outer member, a first inner member, and a double row A second inner member formed with at least one of the inner races, and a flange-like caulking portion formed by crimping an end of the first inner member to the outer diameter side. Serration portion of serration extending in the axial direction on the inner circumference of the first inner member, comprising an inner member that is non-separably coupled to the member and a double row rolling element interposed between the outer member and the inner member In the drive wheel bearing device in which the outer joint member of the constant velocity universal joint is press-fitted through a torque transmission means that transmits torque by meshing with each other.
After the second inner member is press-fitted into the first inner member that has been previously broached, the serration extending in the axial direction on the inner periphery of the first inner member is again broached and then crimped It is characterized by.

本発明の請求項５に係る駆動車輪用軸受装置は、駆動力を車輪へ伝達させる歯部を形成するためのブローチ加工を施すための第１内側部材に設けられている下孔は、第２内側部材を第１内側部材に圧入することにより発生する下孔寸法の収縮量を見込んだ分だけ、前記下孔寸法が予め大きく設定されていることを特徴とする。 In the drive wheel bearing device according to claim 5 of the present invention, the pilot hole provided in the first inner member for performing broaching for forming the tooth portion for transmitting the driving force to the wheel is the second hole. The size of the pilot hole is set to be large in advance so as to allow for the amount of contraction of the pilot hole size generated by press-fitting the inner member into the first inner member.

本発明の請求項６に係る駆動車輪用軸受装置の加工方法は、内周に複列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレーズのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材に第２内側部材が圧入された状態で結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置の加工方法において、
第２内側部材を第１内側部材に圧入した後に、第１内側部材の内周に軸方向に延びるセレーションを形成するためのブローチ加工を施し、完成品としたことを特徴とする。 The processing method of the drive wheel bearing device according to claim 6 of the present invention includes an outer member having a double row outer race on the inner periphery, a double row inner race facing the outer race of the outer member, and a first inner member. , And a second inner member forming at least one of the double-row inner raises, an inner member coupled with the second inner member pressed into the first inner member, an outer member, and an inner member And the outer side of the constant velocity universal joint via torque transmission means for transmitting torque by meshing the teeth of serrations extending in the axial direction on the inner periphery of the first inner member. In the processing method of the drive wheel bearing device in which the joint member is press-fitted,
After the second inner member is press-fitted into the first inner member, a broaching process for forming serrations extending in the axial direction is performed on the inner periphery of the first inner member to obtain a finished product.

本発明の請求項７に係る駆動車輪用軸受装置の加工方法は、内周に複列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレーズのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材に第２内側部材が圧入された状態で結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置の加工方法において、
予めブローチ加工を施した第１内側部材に第２内側部材を圧入した後に、第１内側部材の内周に軸方向に延びるセレーションに対して再度ブローチ加工を施し、完成品としたことを特徴とする。 According to a seventh aspect of the present invention, there is provided a processing method for a bearing device for a drive wheel, an outer member having a double row outer race on an inner periphery, a double row inner race facing the outer race of the outer member, and a first inner member. , And a second inner member forming at least one of the double-row inner raises, an inner member coupled with the second inner member pressed into the first inner member, an outer member, and an inner member And the outer side of the constant velocity universal joint via torque transmission means for transmitting torque by meshing the teeth of serrations extending in the axial direction on the inner periphery of the first inner member. In the processing method of the drive wheel bearing device in which the joint member is press-fitted,
After the second inner member is press-fitted into the first inner member that has been broached in advance, the serration extending in the axial direction on the inner periphery of the first inner member is again broached to obtain a finished product. To do.

本発明の請求項８に係る駆動車輪用軸受装置の加工方法は、内周に後列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレースのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材の端部を外径側に加締めてできたフランジ状の加締め部で第１内側部材と第２内側部材とを非分離に結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置の加工方法において、
第２内側部材を第１内側部材に圧入した後に第１内側部材の内周に軸方向に延びるセレーションを形成するためのブローチ加工を施し、次に、加締めることを特徴とする。 The processing method of the drive wheel bearing device according to claim 8 of the present invention includes an outer member having a rear row outer race on the inner periphery, a double row inner race facing the outer race of the outer member, a first inner member, And a second inner member forming at least one of the double row inner races, and a flange-like crimped portion formed by crimping an end of the first inner member to the outer diameter side, A serration that includes an inner member that is non-separably coupled to the second inner member, and a double-row rolling element that is interposed between the outer member and the inner member, and extends axially on the inner periphery of the first inner member. In the processing method of the bearing device for a drive wheel in which the outer joint member of the constant velocity universal joint is press-fitted through a torque transmission means that transmits torque by meshing the teeth of
After the second inner member is press-fitted into the first inner member, broaching is performed on the inner periphery of the first inner member to form a serration extending in the axial direction, and then crimping is performed.

本発明の請求項９に係る駆動車輪用軸受装置の加工方法は、内周に後列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレースのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材の端部を外径側に加締めてできたフランジ状の加締め部で第１内側部材と第２内側部材とを非分離に結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置の加工方法において、
予めブローチ加工を施した第１内側部材に第２内側部材を圧入した後に、第１内側部材の内周に軸方向に延びるセレーションに対して再度ブロ−チ加工を施し、次に、加締めることを特徴とする。 The processing method of the drive wheel bearing device according to claim 9 of the present invention includes an outer member having a rear row outer race on the inner periphery, a double row inner race facing the outer race of the outer member, a first inner member, And a second inner member forming at least one of the double-row inner races, and a flange-like crimped portion formed by crimping an end of the first inner member to the outer diameter side, A serration that includes an inner member that is non-separably coupled to the second inner member, and a double-row rolling element that is interposed between the outer member and the inner member, and extends in the axial direction on the inner periphery of the first inner member. In the processing method of the bearing device for a drive wheel in which the outer joint member of the constant velocity universal joint is press-fitted through a torque transmission means that transmits torque by meshing the tooth portions of
After the second inner member is press-fitted into the first inner member that has been previously broached, the serration extending in the axial direction on the inner periphery of the first inner member is again broached and then crimped It is characterized by.

本発明の請求項１０に係る駆動車輪用軸受装置の加工方法は、駆動力を車輪へ伝達させる歯部を形成するためのブローチ加工を施すための第１内側部材に設けられている下孔は、第２内側部材を第１内側部材に圧入することにより発生する下孔寸法の収縮量を見込んだ分だけ、前記下孔寸法が予め大きく設定されていることを特徴とする。 In the machining method for a drive wheel bearing device according to claim 10 of the present invention, the pilot hole provided in the first inner member for performing broaching for forming the tooth portion for transmitting the drive force to the wheel is: The pilot hole dimension is set to be large in advance by the amount of shrinkage of the pilot hole dimension generated by press-fitting the second inner member into the first inner member.

本発明によれば、第２内側部材を第１内側部材に圧入した後に、第１内側部材の内周に軸方向に延びるセレーションを形成するためのブローチ加工を施し、完成品としていることから、ハブ（第１内側部材）の内端部の縮径を防止して、等速自在継手の組付けを容易に且つスムーズに行うことができる。 According to the present invention, after press-fitting the second inner member into the first inner member, a broaching process is performed to form a serration extending in the axial direction on the inner periphery of the first inner member, thereby obtaining a finished product. The diameter reduction of the inner end part of the hub (first inner member) can be prevented, and the constant velocity universal joint can be assembled easily and smoothly.

即ち、第１内側部材の内周に形成されたトルク伝達用歯部の第２内側部材の圧入部近傍で、第１内側部材に第２内側部材を圧入することによる縮径現象によるセレーションの変形をなくし、その後、第１内側部材の内周に外側継手部材を圧入する際にも、圧入力が過大となることもなく、スムーズな圧入作業が可能となる。しかも、トルク伝達用歯部の軸方向有効長さを損なうことなく、第２内側部材の圧入に伴うハブ輪の縮径現象による悪影響を、低コストに防止することができる。 That is, the deformation of the serration due to the diameter reduction phenomenon by press-fitting the second inner member into the first inner member in the vicinity of the press-fitting portion of the second inner member of the torque transmitting tooth portion formed on the inner periphery of the first inner member. After that, when the outer joint member is press-fitted into the inner periphery of the first inner member, the press-fitting operation is not excessive, and a smooth press-fitting operation is possible. In addition, an adverse effect due to the diameter reduction phenomenon of the hub wheel due to the press-fitting of the second inner member can be prevented at a low cost without impairing the axial effective length of the torque transmitting tooth portion.

以下、本発明の実施の形態に係る駆動車輪用軸受装置及びその加工方法を図面を参照しつつ説明する。 Hereinafter, a bearing device for a driving wheel and a processing method thereof according to an embodiment of the present invention will be described with reference to the drawings.

（駆動車輪用軸受装置（駆動輪用ハブユニット）の全体構成）
図１は、本発明に係る駆動車輪用軸受装置（駆動輪用ハブユニット）の縦断面図である。図２は、図１に示した駆動車輪用軸受装置（駆動輪用ハブユニット）の要部の断面図である（但し、図２は、その左右が図１に対して逆転してある）。 (Overall configuration of drive wheel bearing device (drive wheel hub unit))
FIG. 1 is a longitudinal sectional view of a drive wheel bearing device (drive wheel hub unit) according to the present invention. FIG. 2 is a cross-sectional view of a main part of the drive wheel bearing device (drive wheel hub unit) shown in FIG. 1 (however, FIG. 2 has its left and right reversed with respect to FIG. 1).

なお、図１及び図２に示した駆動車輪用軸受装置（駆動輪用ハブユニット）は、後述する第１実施の形態（図４乃至図７）、及び、第２実施の形態（図８乃至図１１）に対応している（即ち、非加締めタイプ）。 The drive wheel bearing device (drive wheel hub unit) shown in FIG. 1 and FIG. 2 includes a first embodiment (FIGS. 4 to 7) and a second embodiment (FIGS. 8 to 8) which will be described later. 11) (that is, non-caulking type).

駆動車輪用軸受装置（駆動輪用ハブユニット）５では、外輪（外方部材）６の内径側に、複数個のボール（転動体）１８を介して、ハブ（第１内側部材）８及び内輪（第２内側部材）１２が回転自在に支持してある。 In the drive wheel bearing device (drive wheel hub unit) 5, a hub (first inner member) 8 and an inner ring are provided on the inner diameter side of the outer ring (outer member) 6 via a plurality of balls (rolling elements) 18. (Second inner member) 12 is rotatably supported.

外輪（外方部材）６は、その外周面に設けた支持フランジを介してボルト７により、懸架装置を構成するナックル３に結合固定してある。また、外輪（外方部材）６の一部は、ナックル３の支持孔４に挿入してある。 The outer ring (outer member) 6 is coupled and fixed to the knuckle 3 constituting the suspension device by a bolt 7 via a support flange provided on the outer peripheral surface thereof. A part of the outer ring (outer member) 6 is inserted into the support hole 4 of the knuckle 3.

ハブ（第１内側部材）８には、取付け時に車体の外側に位置する外端部分外周に、車輪のホイール１やブレーキのディスクロータ２を取り付けるための取付フランジ１３が設けてある。即ち、取付フランジ１３の外周部には、円周方向に等間隔に複数個のハブボルト孔１４を備え、ハブボルト９により、車輪のホイール１やブレーキのディスクロータ２を取り付けるようになっている。 The hub (first inner member) 8 is provided with a mounting flange 13 for mounting the wheel 1 of the wheel and the disc rotor 2 of the brake on the outer periphery of the outer end portion positioned outside the vehicle body at the time of mounting. That is, a plurality of hub bolt holes 14 are provided on the outer peripheral portion of the mounting flange 13 at equal intervals in the circumferential direction, and the wheel 1 of the wheel and the disc rotor 2 of the brake are mounted by the hub bolt 9.

ハブ（第１内側部材）８の軸方向孔１１には、雌スプライン部１０が形成してある。この雌スプライン部１０には、等速ジョイント（等速自在継手）２１の外側継手部材（雄スプライン軸）２２をスプライン嵌合して固定するようになっている。 A female spline portion 10 is formed in the axial hole 11 of the hub (first inner member) 8. An outer joint member (male spline shaft) 22 of a constant velocity joint (constant velocity universal joint) 21 is fixed to the female spline portion 10 by spline fitting.

なお、複数個のボール（転動体）１８は、ケージ（保持器）１９により保持するように構成してある。 The plurality of balls (rolling elements) 18 are configured to be held by a cage (cage) 19.

（駆動車輪用軸受装置（駆動輪用ハブユニット）の全体構成の他例）
図３は、本発明に係る駆動車輪用軸受装置（駆動輪用ハブユニット）の他例の要部の断面図である。 (Other example of overall configuration of bearing device for driving wheel (hub unit for driving wheel))
FIG. 3 is a cross-sectional view of the main part of another example of the drive wheel bearing device (drive wheel hub unit) according to the present invention.

なお、図３に示した駆動車輪用軸受装置（駆動輪用ハブユニット）は、後述する第３実施の形態（図１２乃至図１６）、及び、第４実施の形態（図１７乃至図２１）に対応している（即ち、加締めタイプ）。 The drive wheel bearing device (drive wheel hub unit) shown in FIG. 3 includes a third embodiment (FIGS. 12 to 16) and a fourth embodiment (FIGS. 17 to 21) which will be described later. (Ie, caulking type).

図１及び図２に示した駆動車輪用軸受装置（駆動輪用ハブユニット）と相違する点は、ハブ（第１内側部材）８の内端部を加締め加工していることである。 The difference from the drive wheel bearing device (drive wheel hub unit) shown in FIGS. 1 and 2 is that the inner end of the hub (first inner member) 8 is crimped.

すなわち、ハブ（第１内側部材）８の小径段部１５に内輪（第２内側部材）１２を圧入した後に、ハブ（第１内側部材）８の内端部１６が加締め加工（塑性加工）してある。この場合には、軸受内部の予圧管理を行うことができる。その他の構成、作用等は、図１及び図２に示した駆動車輪用軸受装置（駆動輪用ハブユニット）に略同じである。 That is, after the inner ring (second inner member) 12 is press-fitted into the small-diameter step portion 15 of the hub (first inner member) 8, the inner end portion 16 of the hub (first inner member) 8 is crimped (plastic processing). It is. In this case, preload management inside the bearing can be performed. Other configurations and operations are substantially the same as those of the drive wheel bearing device (drive wheel hub unit) shown in FIGS. 1 and 2.

なお、ハブ（第１内側部材）８の内端部１６を加締め加工する際には、特許文献２に開示してあるように、ハブ８（第１内側部材）の内端部１６に、変形防止治具を予め挿入し、その後に、加締め加工を施し、これにより、ハブ（第１内側部材）８の内端部１６の径方向内方への変形を防止できるように構成してあってもよい。この場合には、加締め加工による雌セレーション部１０への悪影響をより一層軽減することができる。 When caulking the inner end portion 16 of the hub (first inner member) 8, as disclosed in Patent Document 2, the inner end portion 16 of the hub 8 (first inner member) A deformation preventing jig is inserted in advance, and thereafter, caulking is performed, whereby the inner end portion 16 of the hub (first inner member) 8 can be prevented from being deformed inward in the radial direction. There may be. In this case, the adverse effect on the female serration portion 10 due to the caulking process can be further reduced.

（第１実施の形態）
図４は、本発明の第１実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。図５は、本発明の第１実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。図６は、本発明の第１実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。図７は、本発明の第１実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。 (First embodiment)
FIG. 4 is a cross-sectional view of a main part of the drive wheel bearing device according to the first embodiment of the present invention, and is a diagram of a first assembly process of the hub unit. FIG. 5 is a cross-sectional view of a main part of the drive wheel bearing device according to the first embodiment of the present invention, and is a diagram of a second assembly process of the hub unit. FIG. 6 is a cross-sectional view of a main part of the drive wheel bearing device according to the first embodiment of the present invention, and is a diagram of a third assembly process of the hub unit. FIG. 7 is a cross-sectional view of a main part of the drive wheel bearing device according to the first embodiment of the present invention, and is a diagram of a fourth assembly process of the hub unit.

図４の第１組立工程に於いて、図４は、図２の駆動車輪用軸受装置５の１要素であるハブ（第１内側部材）８であって、組立て前の単品の状態を示している。 4, the hub (first inner member) 8 which is one element of the drive wheel bearing device 5 of FIG. 2 is shown as a single item before assembly. Yes.

ハブ（第１内側部材）８の車輪が取付けられることになるアウトボード側にはフランジ１３が設けられており、そのフランジ１３の外周には、円周方向に等間隔に複数個のハブボルト孔１４を備えている。また、ハブ（第１内側部材）８の駆動車輪用軸受装置５を車体へ取付けられるインボード側には、内輪（第２内側部材）１２が圧入されるための外径となる部分（小径段部１５）を、機械加工により設けている。また、軸方向孔１１の内周面は、ブローチ加工の基準面となる。 A flange 13 is provided on the outboard side to which the wheel of the hub (first inner member) 8 is to be attached, and a plurality of hub bolt holes 14 are provided on the outer periphery of the flange 13 at equal intervals in the circumferential direction. It has. Further, on the inboard side where the drive wheel bearing device 5 of the hub (first inner member) 8 can be attached to the vehicle body, a portion (small diameter step) that becomes an outer diameter for press-fitting the inner ring (second inner member) 12. Part 15) is provided by machining. Further, the inner peripheral surface of the axial hole 11 serves as a reference surface for broaching.

図５の第２組立工程に於いて、ハブ（第１内側部材）８に、内周面に複列の外輪軌道（アウタレース）６ａ，６ａを有する外輪（外方部材）６、複数個のボール１８、保持器１９など、車輪用軸受装置５としての要素を取付けた後に、内輪（第２内側部材）１２をハブ（第１内側部材）８に圧入する。 5, the hub (first inner member) 8 has an outer ring (outer member) 6 having a plurality of outer ring raceways (outer races) 6a, 6a on the inner peripheral surface, and a plurality of balls. After the elements as the wheel bearing device 5 such as 18 and the cage 19 are attached, the inner ring (second inner member) 12 is press-fitted into the hub (first inner member) 8.

しかし、この時、ハブ（第１内側部材）８の外径寸法φＡと、内輪（第２内側部材）１２の内径寸法φＢには、締め代を設けており、前記圧入をすることによって、先に述べたように、ハブ（第１内側部材）８の特に圧入部近傍３０の内周部３１が縮径して、この内周部３１の内径寸法は、φＤ’となる。 However, at this time, the outer diameter dimension φA of the hub (first inner member) 8 and the inner diameter dimension φB of the inner ring (second inner member) 12 are provided with a tightening margin. As described above, the inner peripheral portion 31 of the hub (first inner member) 8 particularly in the vicinity of the press-fit portion 30 is reduced in diameter, and the inner diameter of the inner peripheral portion 31 is φD ′.

この内周部３１は、後に行なうブローチ加工の基準となるため、内周部３１が縮径して内径寸法φＤ’なると、ブローチ加工用工具であるブローチが内周部３１の細径した部分に引っ掛かり、前記ブローチ加工が行なえない。 Since the inner peripheral portion 31 becomes a reference for broaching to be performed later, when the inner peripheral portion 31 is reduced in diameter to an inner diameter dimension φD ′, the broach as a broaching tool is formed on the narrowed portion of the inner peripheral portion 31. It is caught and the broaching process cannot be performed.

そのため、本実施の形態では、図４のように、予めハブ（第１内側部材）８の内周部３１の内径寸法をこの収縮量を加味して（＋φｄ）分大きく設定してφ（Ｄ＋ｄ）とすることによって、前記圧入による内周部３１の内径寸法φ（Ｄ＋ｄ）は、縮径しても、φＤ’≧φＤとすることができる。 Therefore, in the present embodiment, as shown in FIG. 4, the inner diameter of the inner peripheral portion 31 of the hub (first inner member) 8 is set to be larger by (+ φd) in consideration of the amount of contraction, and φ (D + d ), The inner diameter dimension φ (D + d) of the inner peripheral portion 31 by the press-fitting can satisfy φD ′ ≧ φD even if the diameter is reduced.

なお、前記縮径による収縮量を加味した量（+φｄ）には、ハブ（第１内側部材）８の外径寸法φＡと、内輪（第２内側部材）１２の内径寸法φＢとの締め代により収総量にある程度のバラツキが発生するため、前記φｄに対して△α分を付加すべきである。 In addition, the amount (+ φd) including the amount of contraction due to the diameter reduction (+ φd) is a fastening allowance between the outer diameter size φA of the hub (first inner member) 8 and the inner diameter size φB of the inner ring (second inner member) 12. As a result, a certain amount of variation occurs in the total amount, so that Δα should be added to φd.

また、図２５のように、内周部３１の収縮量は、圧入部近傍３０にかかる部分ほど収縮量が大きく、さらに均一な変形ではないため、図４に示したように、例えば内周部３１の内径寸法をインボード側に向かって広がるようなテーパ形状になるように、寸法及び形状を設定することが望ましく、後に、このハブ（第１内側部材）８に内輪（第２内側部材）１２を圧入しても、ほぼ均一な円筒状の内径寸法φＤ’を持った内周部３１とすることができる。 Further, as shown in FIG. 25, the amount of contraction of the inner peripheral portion 31 is larger in the portion near the press-fitted portion 30 and is not more uniform, so as shown in FIG. It is desirable to set the dimensions and the shape so that the inner diameter of 31 expands toward the inboard side. Later, the hub (first inner member) 8 has an inner ring (second inner member). Even if 12 is press-fitted, the inner peripheral portion 31 having a substantially uniform cylindrical inner diameter dimension φD ′ can be obtained.

そして、図７のように、前記ほぼ均一な円筒状の内径寸法φＤ’及びφＤを基準として、ハブ（第１内側部材）８の内周部３１及び軸方向孔１１に、ブローチ加工を施すことによって、前記圧入による変形の無い高精度な諸元の雌セレーション部１０を設けることが出来る。 Then, as shown in FIG. 7, broaching is performed on the inner peripheral portion 31 and the axial hole 11 of the hub (first inner member) 8 on the basis of the substantially uniform cylindrical inner diameters φD ′ and φD. Therefore, it is possible to provide the female serration portion 10 having high accuracy without deformation due to the press-fitting.

また、この工法は、駆動車輪用軸受装置５の半完成状態にて実施するものであり、ブローチ加工は、ドライ加工、もしくはセミドライ加工により実施する必要があり、また、前記駆動車輪用軸受装置５内にブローチ加工時に発生する切粉が進入しないようなカバーなどを設けてもよい。 In addition, this construction method is performed in a semi-finished state of the drive wheel bearing device 5, and broaching needs to be performed by dry processing or semi-dry processing, and the drive wheel bearing device 5 is used. A cover or the like that prevents chips generated during broaching from entering may be provided.

これによって、前記高精度な諸元の雌セレーション部１０を設けた駆動車輪用軸受装置５とすることができ、前記駆動車輪用軸受装置５の雌セレーション部１０に等速自在継手２１の前記外側継手部材２２が圧入出来ないという問題は解消される。 Accordingly, the drive wheel bearing device 5 provided with the female serration portion 10 having the high-precision specifications can be obtained, and the outer side of the constant velocity universal joint 21 is added to the female serration portion 10 of the drive wheel bearing device 5. The problem that the joint member 22 cannot be press-fitted is solved.

（第２実施の形態）
図８は、本発明の第２実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。図９は、本発明の第２実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。図１０は、本発明の第２実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。図１１は、本発明の第２実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。 (Second Embodiment)
FIG. 8 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the second embodiment of the present invention, and is a diagram of a first assembly process of the hub unit. FIG. 9 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the second embodiment of the present invention, and is a diagram of a second assembly process of the hub unit. FIG. 10 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the second embodiment of the present invention, and is a diagram of a third assembly process of the hub unit. FIG. 11 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the second embodiment of the present invention, and is a diagram of a fourth assembly process of the hub unit.

図８の第１組立工程に於いて、図８は、図２の駆動車輪用軸受装置５の１要素であるハブ（第１内側部材）８であって、組立て前の単品の状態を示している。 In the first assembly step of FIG. 8, FIG. 8 shows a hub (first inner member) 8 that is one element of the drive wheel bearing device 5 of FIG. 2, and shows a single product before assembly. Yes.

ハブ（第１内側部材）８の車輪が取付けられることになるアウトボード側にはフランジ１３が設けられており、そのフランジ１３の外周には、円周方向に等間隔に複数個のハブボルト孔１４を備えている。また、ハブ（第１内側部材）８の駆動車輪用軸受装置５を車体へ取付けられるインボード側には、内輪（第２内側部材）１２が圧入されるための外径となる部分（小径段部１５）を、機械加工により設けている。 A flange 13 is provided on the outboard side to which the wheel of the hub (first inner member) 8 is to be attached, and a plurality of hub bolt holes 14 are provided on the outer periphery of the flange 13 at equal intervals in the circumferential direction. It has. Further, on the inboard side where the drive wheel bearing device 5 of the hub (first inner member) 8 can be attached to the vehicle body, a portion (small diameter step) that becomes an outer diameter for press-fitting the inner ring (second inner member) 12. Part 15) is provided by machining.

さらに、その軸方向孔１１の内周面は、図８のように、先に述べたようなテーパ形状を設けた後に、図９の第２組立工程に於いて、ブローチ加工によって、ハブホイールとなるフランジ１３から他端へ軸方向に向かう雌セレーション部１０が予め設けられている。 Further, as shown in FIG. 8, the inner peripheral surface of the axial hole 11 is provided with a tapered shape as described above, and then in the second assembly step of FIG. A female serration portion 10 extending in the axial direction from the flange 13 to the other end is provided in advance.

この雌セレーション部１０は、後に等速自在継手２１の外側継手部材２２が圧入されて、前記等速自在継手２１の外側継手部材２２に設けられている雄セレーションの歯部との噛み合いでトルク伝達される部分となる。 In this female serration portion 10, the outer joint member 22 of the constant velocity universal joint 21 is press-fitted later, and torque is transmitted by meshing with the teeth of the male serration provided on the outer joint member 22 of the constant velocity universal joint 21. It becomes a part to be done.

この図９のハブ（第１内側部材）８に、図１０に示すように、内周に複列のアウタレース６ａ，６ａを有する外方部材６、複数個のボール１８、保持器１９など、車輪用軸受装置５としての要素を取付けた後に、内輪（第２内側部材）１２をハブ（第１内側部材）８に圧入する。 As shown in FIG. 10, the hub (first inner member) 8 shown in FIG. 9 includes an outer member 6 having a plurality of outer races 6a and 6a on the inner periphery, a plurality of balls 18, a cage 19, and the like. After the element as the bearing device 5 is attached, the inner ring (second inner member) 12 is press-fitted into the hub (first inner member) 8.

しかし、この時、ハブ（第１内側部材）８の外径寸法φＡと、内輪（第２内側部材）１２の内径寸法φＢには、締め代を設けており、前記圧入をすることによって、先に述べたように、ハブ（第１内側部材）８の特に圧入部近傍３０の内周部３１の雌セレーション部１０が縮径する。 However, at this time, the outer diameter dimension φA of the hub (first inner member) 8 and the inner diameter dimension φB of the inner ring (second inner member) 12 are provided with a tightening margin. As described above, the female serration portion 10 of the inner peripheral portion 31 in the vicinity of the press-fitting portion 30 of the hub (first inner member) 8 is reduced in diameter.

そこで、本実施の形態では、図１１の状態で、前記ほぼ均一な円筒状の小径を基準として、ハブ（第１内側部材）８の軸方向孔１１に予めブローチ加工によって設けられている雌セレーション部１０に対し、再度ブローチ加工を施すことによって、前記圧入により変形したオーバーピン径寸法、大径寸法を修正し、高精度な諸元の雌セレーション部１０を設けることが出来る。 Therefore, in the present embodiment, in the state shown in FIG. 11, the female serration provided in advance in the axial hole 11 of the hub (first inner member) 8 by broaching on the basis of the substantially uniform small diameter of the cylinder. By subjecting the part 10 to broaching again, the overpin diameter dimension and the large diameter dimension deformed by the press-fitting can be corrected, and the female serration part 10 having high-precision specifications can be provided.

このとき、セレーションの諸元によっては小径寸法も同時に修正してもよい。また、前記再度ブローチ加工を行なう際は、ブローチ加工工具であるブロ−チと図１１の雌セレーション部１０との位相を合わせて加工を行なう必要があるため、再度ブローチ加工を行なう際のブローチの前歯には、前記雌セレーション部１０に倣うような案内を設けるとよい。 At this time, depending on the specifications of the serration, the small diameter dimension may be corrected at the same time. Further, when the broaching is performed again, it is necessary to perform the processing by matching the phases of the broaching tool and the female serration portion 10 of FIG. 11, so that the broaching when the broaching is performed again is performed. The front teeth may be provided with a guide that follows the female serration portion 10.

（第３実施の形態）
図１２は、本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。図１３は、本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。図１４は、本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。図１５は、本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。図１６は、本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第５組立工程の図である。 (Third embodiment)
FIG. 12 is a cross-sectional view of a main part of the bearing device for a drive wheel according to the third embodiment of the present invention, and is a diagram of a first assembly process of the hub unit. FIG. 13 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the third embodiment of the present invention, and is a diagram of a second assembly process of the hub unit. FIG. 14 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the third embodiment of the present invention, and is a diagram of a third assembly process of the hub unit. FIG. 15 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the third embodiment of the present invention, and is a diagram of a fourth assembly process of the hub unit. FIG. 16 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the third embodiment of the present invention, and is a diagram of a fifth assembly process of the hub unit.

図１２の第１組立工程に於いて、図１２は、図３の駆動車輪用軸受装置５の１要素であるハブ（第１内側部材）８であって、組立て前の単品の状態を示している。 In the first assembling step of FIG. 12, FIG. 12 shows a state of the hub (first inner member) 8 which is one element of the drive wheel bearing device 5 of FIG. Yes.

また、軸方向孔１１の内周面は、ブローチ加工の基準面となるため、機械加工によって設けられており、さらに、図１２のように、先に述べたようなテーパ形状を設けた内周部３１がある。 Further, since the inner peripheral surface of the axial hole 11 serves as a reference surface for broaching, it is provided by machining, and as shown in FIG. 12, the inner periphery provided with the tapered shape as described above. There is a part 31.

図１３の第２組立工程に於いて、ハブ（第１内側部材）８に、内周面に複列の外輪軌道（アウタレース）６ａ，６ａを有する外輪（外方部材）６、複数個のボール１８、保持器１９など、車輪用軸受装置５としての要素を取付けた後に、内輪（第２内側部材）１２をハブ（第１内側部材）８に圧入する。 In the second assembly step of FIG. 13, an outer ring (outer member) 6 having a plurality of outer ring raceways (outer races) 6a, 6a on the inner peripheral surface of the hub (first inner member) 8 and a plurality of balls. After the elements as the wheel bearing device 5 such as 18 and the cage 19 are attached, the inner ring (second inner member) 12 is press-fitted into the hub (first inner member) 8.

そのため、本実施の形態では、図１２のように、予めハブ（第１内側部材）８の内周部３１の内径寸法をこの収縮量を加味して（＋φｄ）分大きく設定してφ（Ｄ＋ｄ）とすることによって、前記圧入による内周部３１の内径寸法φ（Ｄ＋ｄ）は、縮径しても、φＤ’≧φＤとすることができる。 Therefore, in the present embodiment, as shown in FIG. 12, the inner diameter of the inner peripheral portion 31 of the hub (first inner member) 8 is set to be larger by (+ φd) in consideration of the amount of contraction, and φ (D + d ), The inner diameter dimension φ (D + d) of the inner peripheral portion 31 by the press-fitting can satisfy φD ′ ≧ φD even if the diameter is reduced.

また、図２５のように、内周部３１の収縮量は、圧入部近傍３０にかかる部分ほど収縮量が大きく、さらに均一な変形ではないため、図１２に示したように、例えば内周部３１の内径寸法をインボード側に向かって広がるようなテーパ形状になるように、寸法及び形状を設定することが望ましく、このハブ（第１内側部材）８に、内輪（第２内側部材）１２を圧入すると、ほぼ均一な円筒状の内径寸法φＤ’を持った内周部３１とすることができる。 Further, as shown in FIG. 25, the shrinkage amount of the inner peripheral portion 31 is larger in the portion near the press-fitting portion 30 and is not more uniform, so as shown in FIG. It is desirable to set the size and shape so that the inner diameter of 31 is tapered so as to expand toward the inboard side. The hub (first inner member) 8 is connected to the inner ring (second inner member) 12. Can be formed into an inner peripheral portion 31 having a substantially uniform cylindrical inner diameter dimension φD ′.

そして、図１５のように、前記ほぼ均一な円筒状の内径寸法φＤ’及びφＤを基準として、ハブ（第１内側部材）８の内周部３１及び軸方向孔１１に、ブローチ加工を施すことによって、前記圧入による変形の無い高精度な諸元の雌セレーション部１０を設けることが出来る。 Then, as shown in FIG. 15, broaching is performed on the inner peripheral portion 31 and the axial hole 11 of the hub (first inner member) 8 on the basis of the substantially uniform cylindrical inner diameters φD ′ and φD. Therefore, it is possible to provide the female serration portion 10 having high accuracy without deformation due to the press-fitting.

次に、図１６に示したように、ハブ（第１内側部材）８の軸端部（内端部１６）を径方向の外側に塑性変形させる軸端の加締め加工を行って、前記駆動車輪用軸受装置５の軸受内部の予圧管理を行なう構造とする。 Next, as shown in FIG. 16, the shaft end (inner end portion 16) of the hub (first inner member) 8 is subjected to caulking processing for plastically deforming the outer end in the radial direction to perform the driving. The wheel bearing device 5 has a structure for preload management inside the bearing.

（第４実施の形態）
図１７は、本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。図１８は、本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。図１９は、本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。図２０は、本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。図２１は、本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第５組立工程の図である。 (Fourth embodiment)
FIG. 17 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the fourth embodiment of the present invention, and is a diagram of a first assembly process of the hub unit. FIG. 18 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the fourth embodiment of the present invention, and is a diagram of a second assembly process of the hub unit. FIG. 19 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the fourth embodiment of the present invention, and is a diagram of a third assembly process of the hub unit. FIG. 20 is a cross-sectional view of a main part of the bearing device for a drive wheel according to the fourth embodiment of the present invention, and is a diagram of a fourth assembly process of the hub unit. FIG. 21 is a cross-sectional view of the main part of the bearing device for a drive wheel according to the fourth embodiment of the present invention, and is a diagram of the fifth assembly process of the hub unit.

図１７の第１組立工程に於いて、図１７は、図３の駆動車輪用軸受装置５の１要素であるハブ（第１内側部材）８であって、組立て前の単品の状態を示している。 In the first assembling process of FIG. 17, FIG. 17 shows a state of a single article before assembling, which is a hub (first inner member) 8 which is one element of the drive wheel bearing device 5 of FIG. Yes.

さらに、その軸方向孔１１の内周面は、図１７のように、先に述べたようなテーパ形状を設けた後に、図１８の第２組立工程に於いて、ブローチ加工によって、ハブホイールとなるフランジ１３から他端へ軸方向に向かう雌セレーション部１０が予め設けられている。 Further, the inner peripheral surface of the axial hole 11 is provided with a taper shape as described above as shown in FIG. 17, and then broached in the second assembly step of FIG. A female serration portion 10 extending in the axial direction from the flange 13 to the other end is provided in advance.

この図１８のハブ（第１内側部材）８に、図１９に示すように、内周に複列のアウタレース６ａ，６ａを有する外方部材６、複数個のボール１８、保持器１９など、車輪用軸受装置５としての要素を取付けた後に、内輪（第２内側部材）１２をハブ（第１内側部材）８に圧入する。 As shown in FIG. 19, the hub (first inner member) 8 shown in FIG. 18 includes an outer member 6 having a plurality of outer races 6a and 6a on the inner periphery, a plurality of balls 18, a cage 19, and the like. After the element as the bearing device 5 is attached, the inner ring (second inner member) 12 is press-fitted into the hub (first inner member) 8.

そこで、本実施の形態では、図２０の状態で、前記ほぼ均一な円筒状の小径を基準として、ハブ（第１内側部材）８の軸方向孔１１に予めブローチ加工によって設けられている雌セレーション部１０に対し、再度ブローチ加工を施すことによって、前記圧入により変形したオーバーピン径寸法、大径寸法を修正し、高精度な諸元の雌セレーション部１０を設けることが出来る。 Therefore, in the present embodiment, in the state of FIG. 20, the female serration provided in advance in the axial hole 11 of the hub (first inner member) 8 by broaching on the basis of the substantially uniform small diameter of the cylinder. By subjecting the part 10 to broaching again, the overpin diameter dimension and the large diameter dimension deformed by the press-fitting can be corrected, and the female serration part 10 having high-precision specifications can be provided.

このとき、セレーションの諸元によっては小径寸法も同時に修正してもよい。また、前記再度ブローチ加工を行なう際は、ブローチ加工工具であるブロ−チと図２０の雌セレーション部１０との位相を合わせて加工を行なう必要があるため、再度ブローチ加工を行なう際のブローチの前歯には、前記雌セレーション部１０に倣うような案内を設けるとよい。 At this time, depending on the specifications of the serration, the small diameter dimension may be corrected at the same time. Further, when the broaching is performed again, it is necessary to perform the processing by matching the phases of the broaching tool and the female serration portion 10 of FIG. 20, so that the broaching when the broaching is performed again is performed. The front teeth may be provided with a guide that follows the female serration portion 10.

次に、図２１に示したように、ハブ（第１内側部材）８の軸端部（内端部１６）を径方向の外側に塑性変形させる軸端の加締め加工を行って、前記駆動車輪用軸受装置５の軸受内部の予圧管理を行なう構造とする。 Next, as shown in FIG. 21, the shaft end (inner end portion 16) of the hub (first inner member) 8 is subjected to caulking processing for plastically deforming the outer end in the radial direction to perform the driving. The wheel bearing device 5 has a structure for preload management inside the bearing.

なお、本発明は、上述した実施の形態に限定されず、種々変形可能である。 In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible.

本発明に係る駆動車輪用軸受装置（駆動輪用ハブユニット）の縦断面図である。1 is a longitudinal sectional view of a drive wheel bearing device (drive wheel hub unit) according to the present invention. 図１に示した駆動車輪用軸受装置（駆動輪用ハブユニット）の要部の断面図である（但し、図２は、その左右が図１に対して逆転してある）。FIG. 2 is a cross-sectional view of a main part of the drive wheel bearing device (drive wheel hub unit) shown in FIG. 1 (however, FIG. 2 has its left and right reversed with respect to FIG. 1). 本発明に係る駆動車輪用軸受装置（駆動輪用ハブユニット）の他例の要部の断面図である。It is sectional drawing of the principal part of the other example of the bearing apparatus for driving wheels (hub unit for driving wheels) which concerns on this invention. 本発明の第１実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 1st Embodiment of this invention, Comprising: It is a figure of the 1st assembly process of a hub unit. 本発明の第１実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 1st Embodiment of this invention, Comprising: It is a figure of the 2nd assembly process of a hub unit. 本発明の第１実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 1st Embodiment of this invention, Comprising: It is a figure of the 3rd assembly process of a hub unit. 本発明の第１実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 1st Embodiment of this invention, Comprising: It is a figure of the 4th assembly process of a hub unit. 本発明の第２実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 2nd Embodiment of this invention, Comprising: It is a figure of the 1st assembly process of a hub unit. 本発明の第２実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 2nd Embodiment of this invention, Comprising: It is a figure of the 2nd assembly process of a hub unit. 本発明の第２実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 2nd Embodiment of this invention, Comprising: It is a figure of the 3rd assembly process of a hub unit. 本発明の第２実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 2nd Embodiment of this invention, Comprising: It is a figure of the 4th assembly process of a hub unit. 本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 3rd Embodiment of this invention, Comprising: It is a figure of the 1st assembly process of a hub unit. 本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 3rd Embodiment of this invention, Comprising: It is a figure of the 2nd assembly process of a hub unit. 本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 3rd Embodiment of this invention, Comprising: It is a figure of the 3rd assembly process of a hub unit. 本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 3rd Embodiment of this invention, Comprising: It is a figure of the 4th assembly process of a hub unit. 本発明の第３実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第５組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 3rd Embodiment of this invention, Comprising: It is a figure of the 5th assembly process of a hub unit. 本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 4th Embodiment of this invention, Comprising: It is a figure of the 1st assembly process of a hub unit. 本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 4th Embodiment of this invention, Comprising: It is a figure of the 2nd assembly process of a hub unit. 本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 4th Embodiment of this invention, Comprising: It is a figure of the 3rd assembly process of a hub unit. 本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 4th Embodiment of this invention, Comprising: It is a figure of the 4th assembly process of a hub unit. 本発明の第４実施の形態に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第５組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on 4th Embodiment of this invention, Comprising: It is a figure of the 5th assembly process of a hub unit. 従来例に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第１組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on a prior art example, Comprising: It is a figure of the 1st assembly process of a hub unit. 従来例に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第２組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on a prior art example, Comprising: It is a figure of the 2nd assembly process of a hub unit. 従来例に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第３組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on a prior art example, Comprising: It is a figure of the 3rd assembly process of a hub unit. 従来例に係る駆動車輪用軸受装置の要部の断面図であって、ハブユニットの第４組立工程の図である。It is sectional drawing of the principal part of the bearing apparatus for drive wheels which concerns on a prior art example, Comprising: It is a figure of the 4th assembly process of a hub unit.

符号の説明Explanation of symbols

１ホイール
２ディスクロータ
３ナックル
４支持孔
５車輪用軸受装置（駆動輪用ハブユニット）
６外方部材（外輪）
６ａ外輪軌道（アウターレース）
７ボルト
８第１内側部材（ハブ）
８ａ第１内輪軌道（第１インナーレース）
９ハブボルト
１０雌セレーション部
１１軸方向孔
１２第２内側部材（内輪）
１２ａ第２内輪軌道（第２インナーレース）
１３フランジ
１４ハブボルト孔
１５小径段部
１６内端部
１８ボール（転動体）
１９ケージ（保持器）
２１等速自在継手
２２外側継手部材
３０圧入部近傍
３１内周部 DESCRIPTION OF SYMBOLS 1 Wheel 2 Disc rotor 3 Knuckle 4 Support hole 5 Wheel bearing device (hub unit for driving wheels)
6 Outer member (outer ring)
6a Outer ring raceway (outer race)
7 Bolt 8 First inner member (hub)
8a First inner ring raceway (first inner race)
9 Hub bolt 10 Female serration portion 11 Axial hole 12 Second inner member (inner ring)
12a Second inner ring raceway (second inner race)
13 Flange 14 Hub bolt hole 15 Small diameter step 16 Inner end 18 Ball (rolling element)
19 Cage (Retainer)
21 constant velocity universal joint 22 outer joint member 30 vicinity of press-fit portion 31 inner peripheral portion

Claims

内周に複列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレーズのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材に第２内側部材が圧入された状態で結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置において、
第２内側部材を第１内側部材に圧入した後に、第１内側部材の内周に軸方向に延びるセレーションを形成するためのブローチ加工を施し、完成品としたことを特徴とする駆動車輪用軸受装置。 An outer member having a double row outer race on the inner periphery, a second inner member forming at least one of a double row inner race, a first inner member, and a double row inner raise facing the outer race of the outer member An inner member joined in a state where the second inner member is press-fitted to the first inner member, and a double row rolling element interposed between the outer member and the inner member, and the first inner member In a bearing device for a drive wheel in which an outer joint member of a constant velocity universal joint is press-fitted through a torque transmission means that transmits torque by meshing teeth of serrations extending in the axial direction on the inner periphery of
After the second inner member is press-fitted into the first inner member, a broaching process is performed on the inner periphery of the first inner member to form a serration extending in the axial direction, and a finished product is obtained. apparatus.

内周に複列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレーズのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材に第２内側部材が圧入された状態で結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置において、
予めブローチ加工を施した第１内側部材に第２内側部材を圧入した後に、第１内側部材の内周に軸方向に延びるセレーションに対して再度ブローチ加工を施し、完成品としたことを特徴とする駆動車輪用軸受装置。 An outer member having a double row outer race on the inner periphery, a second inner member forming at least one of a double row inner race, a first inner member, and a double row inner raise facing the outer race of the outer member An inner member joined in a state where the second inner member is press-fitted to the first inner member, and a double row rolling element interposed between the outer member and the inner member, and the first inner member In a bearing device for a drive wheel in which an outer joint member of a constant velocity universal joint is press-fitted through a torque transmission means that transmits torque by meshing teeth of serrations extending in the axial direction on the inner periphery of
After the second inner member is press-fitted into the first inner member that has been broached in advance, the serration extending in the axial direction on the inner periphery of the first inner member is again broached to obtain a finished product. A bearing device for a driving wheel.

内周に後列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレースのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材の端部を外径側に加締めてできたフランジ状の加締め部で第１内側部材と第２内側部材とを非分離に結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置において、
第２内側部材を第１内側部材に圧入した後に第１内側部材の内周に軸方向に延びるセレーションを形成するためのブローチ加工を施し、次に、加締めることを特徴とする駆動車輪用軸受装置。 An outer member having a rear row outer race on the inner periphery, and a second inner member formed with at least one of a double row inner race, a first inner member, and a double row inner race facing the outer race of the outer member An inner member in which the first inner member and the second inner member are joined in a non-separable manner by a flange-like crimped portion formed by crimping the end portion of the first inner member to the outer diameter side, Via a torque transmission means for transmitting torque by meshing teeth of serrations extending in the axial direction on the inner periphery of the first inner member, and the like. In the drive wheel bearing device in which the outer joint member of the speed universal joint is press-fitted,
A bearing for a drive wheel, characterized in that after the second inner member is press-fitted into the first inner member, broaching is performed on the inner periphery of the first inner member to form a serration extending in the axial direction, and then caulking is performed. apparatus.

内周に後列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレースのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材の端部を外径側に加締めてできたフランジ状の加締め部で第１内側部材と第２内側部材とを非分離に結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置において、
予めブローチ加工を施した第１内側部材に第２内側部材を圧入した後に、第１内側部材の内周に軸方向に延びるセレーションに対して再度ブロ−チ加工を施し、次に、加締めることを特徴とする駆動車輪用軸受装置。 An outer member having a rear row outer race on the inner periphery, and a second inner member formed with at least one of a double row inner race, a first inner member, and a double row inner race facing the outer race of the outer member An inner member in which the first inner member and the second inner member are joined in a non-separable manner by a flange-like crimped portion formed by crimping the end portion of the first inner member to the outer diameter side, Via a torque transmission means for transmitting torque by meshing teeth of serrations extending in the axial direction on the inner periphery of the first inner member, and the like. In the drive wheel bearing device in which the outer joint member of the speed universal joint is press-fitted,
After the second inner member is press-fitted into the first inner member that has been previously broached, the serration extending in the axial direction on the inner periphery of the first inner member is again broached and then crimped A bearing device for a drive wheel characterized by the above.

駆動力を車輪へ伝達させる歯部を形成するためのブローチ加工を施すための第１内側部材に設けられている下孔は、第２内側部材を第１内側部材に圧入することにより発生する下孔寸法の収縮量を見込んだ分だけ、前記下孔寸法が予め大きく設定されていることを特徴とする請求項１乃至４のいずれか１項に記載の駆動車輪用軸受装置。 A pilot hole provided in the first inner member for performing broaching for forming a tooth portion for transmitting the driving force to the wheel is generated by press-fitting the second inner member into the first inner member. The drive wheel bearing device according to any one of claims 1 to 4, wherein the pilot hole dimension is set to be large in advance by an amount corresponding to a contraction amount of the hole dimension.

内周に複列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレーズのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材に第２内側部材が圧入された状態で結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置の加工方法において、
第２内側部材を第１内側部材に圧入した後に、第１内側部材の内周に軸方向に延びるセレーションを形成するためのブローチ加工を施し、完成品としたことを特徴とする駆動車輪用軸受装置の加工方法。 An outer member having a double row outer race on the inner periphery, a second inner member forming at least one of a double row inner race, a first inner member, and a double row inner raise facing the outer race of the outer member An inner member joined in a state where the second inner member is press-fitted to the first inner member, and a double row rolling element interposed between the outer member and the inner member, and the first inner member In the machining method of the bearing device for a drive wheel in which the outer joint member of the constant velocity universal joint is press-fitted through the torque transmission means for transmitting torque by meshing the teeth of the serration extending in the axial direction on the inner periphery of
After the second inner member is press-fitted into the first inner member, a broaching process is performed on the inner periphery of the first inner member to form a serration extending in the axial direction, and a finished product is obtained. Processing method of the device.

内周に複列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレーズのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材に第２内側部材が圧入された状態で結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置の加工方法において、
予めブローチ加工を施した第１内側部材に第２内側部材を圧入した後に、第１内側部材の内周に軸方向に延びるセレーションに対して再度ブローチ加工を施し、完成品としたことを特徴とする駆動車輪用軸受装置の加工方法。 An outer member having a double row outer race on the inner periphery, a second inner member forming at least one of a double row inner race, a first inner member, and a double row inner raise facing the outer race of the outer member An inner member joined in a state where the second inner member is press-fitted to the first inner member, and a double row rolling element interposed between the outer member and the inner member, and the first inner member In the machining method of the bearing device for a drive wheel in which the outer joint member of the constant velocity universal joint is press-fitted through the torque transmission means for transmitting torque by meshing the teeth of the serration extending in the axial direction on the inner periphery of
After the second inner member is press-fitted into the first inner member that has been broached in advance, the serration extending in the axial direction on the inner periphery of the first inner member is again broached to obtain a finished product. A method for processing a drive wheel bearing device.

内周に後列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレースのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材の端部を外径側に加締めてできたフランジ状の加締め部で第１内側部材と第２内側部材とを非分離に結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置の加工方法において、
第２内側部材を第１内側部材に圧入した後に第１内側部材の内周に軸方向に延びるセレーションを形成するためのブローチ加工を施し、次に、加締めることを特徴とする駆動車輪用軸受装置の加工方法。 An outer member having a rear row outer race on the inner periphery, and a second inner member formed with at least one of a double row inner race, a first inner member, and a double row inner race facing the outer race of the outer member An inner member in which the first inner member and the second inner member are joined in a non-separable manner by a flange-like crimped portion formed by crimping the end portion of the first inner member to the outer diameter side, Via a torque transmission means for transmitting torque by meshing teeth of serrations extending in the axial direction on the inner periphery of the first inner member, and the like. In the processing method of the bearing device for the drive wheel in which the outer joint member of the speed universal joint is press-fitted,
A bearing for a drive wheel, characterized in that after the second inner member is press-fitted into the first inner member, broaching is performed on the inner periphery of the first inner member to form a serration extending in the axial direction, and then caulking is performed. Processing method of the device.

内周に後列のアウタレースを有する外方部材と、外方部材のアウタレースに対向する複列のインナレース、第１内側部材、および複列のインナレースのうちの少なくとも一方を形成した第２内側部材を備え、第１内側部材の端部を外径側に加締めてできたフランジ状の加締め部で第１内側部材と第２内側部材とを非分離に結合した内方部材と、外方部材と内方部材の間に介在する複列の転動体とを備え、第１内側部材の内周に軸方向に延びるセレーションの歯部同士の噛み合いでトルク伝達を行なうトルク伝達手段を介して等速自在継手の外側継手部材を圧入した駆動車輪用軸受装置の加工方法において、
予めブローチ加工を施した第１内側部材に第２内側部材を圧入した後に、第１内側部材の内周に軸方向に延びるセレーションに対して再度ブロ−チ加工を施し、次に、加締めることを特徴とする駆動車輪用軸受装置の加工方法。 An outer member having a rear row outer race on the inner periphery, and a second inner member formed with at least one of a double row inner race, a first inner member, and a double row inner race facing the outer race of the outer member An inner member in which the first inner member and the second inner member are joined in a non-separable manner by a flange-like crimped portion formed by crimping the end portion of the first inner member to the outer diameter side, Via a torque transmission means for transmitting torque by meshing teeth of serrations extending in the axial direction on the inner periphery of the first inner member, and the like. In the processing method of the bearing device for the drive wheel in which the outer joint member of the speed universal joint is press-fitted,
After the second inner member is press-fitted into the first inner member that has been previously broached, the serration extending in the axial direction on the inner periphery of the first inner member is again broached and then crimped A processing method of a bearing device for a drive wheel characterized by the above.

駆動力を車輪へ伝達させる歯部を形成するためのブローチ加工を施すための第１内側部材に設けられている下孔は、第２内側部材を第１内側部材に圧入することにより発生する下孔寸法の収縮量を見込んだ分だけ、前記下孔寸法が予め大きく設定されていることを特徴とする請求項６乃至９のいずれか１項に記載の駆動車輪用軸受装置の加工方法。 A pilot hole provided in the first inner member for performing broaching for forming a tooth portion for transmitting the driving force to the wheel is generated by press-fitting the second inner member into the first inner member. The method for processing a bearing device for a drive wheel according to any one of claims 6 to 9, wherein the pilot hole dimension is set to be large in advance by an amount corresponding to a contraction amount of the hole dimension.