JP4026656B2 - Method for manufacturing hub unit for driving wheel support - Google Patents

Method for manufacturing hub unit for driving wheel support Download PDF

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JP4026656B2
JP4026656B2 JP2005294336A JP2005294336A JP4026656B2 JP 4026656 B2 JP4026656 B2 JP 4026656B2 JP 2005294336 A JP2005294336 A JP 2005294336A JP 2005294336 A JP2005294336 A JP 2005294336A JP 4026656 B2 JP4026656 B2 JP 4026656B2
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inner ring
hub
ring
peripheral surface
caulking
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JP2006051946A (en
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善久 大貫
勝久 殿岡
忠一 佐藤
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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

Description

この発明の製造方法の対象となる駆動輪支持用ハブユニットは、自動車の駆動輪を懸架装置に対して回転自在に支持すると共に、エンジンから送られてくる駆動力を上記駆動輪に伝達する為に利用する。 The hub unit for driving wheel support , which is the object of the manufacturing method of the present invention , rotatably supports the driving wheel of the automobile with respect to the suspension device and transmits the driving force sent from the engine to the driving wheel. To use.

自動車の駆動輪（ＦＲ車の後輪、ＦＦ車の前輪、４ＷＤ車の全輪）は駆動輪支持用ハブユニットにより懸架装置に支持する。この様な駆動輪支持用ハブユニットの基本構造に就いて、図１に示した本発明の実施の形態の１例により簡単に説明する。この駆動輪支持用ハブユニット１は、ハブ２と、内輪３（図３参照。図１には本発明に係る内輪１３を記載している。）と、外輪４と、複数の転動体５、５とを備える。このうちのハブ２は、全体を略円筒状に形成されたもので、内周面に雌スプライン溝６を形成している。自動車への組み付け状態でこの雌スプライン溝６には、等速ジョイント７のシャフト８を挿通する。又、上記ハブ２の外周面の外端部（外とは、自動車への組み付け状態で幅方向外寄りとなる側を言い、各図の左側となる。反対に幅方向中央寄りとなる側を内と言い、各図の右側となる。）には、車輪を支持する為のフランジ９を形成している。又、このハブ２の中間部には第一の内輪軌道１０を、同じく内端部には外径寸法が小さくなった段部１１を、それぞれ形成している。そして、この段部１１に、その外周面に第二の内輪軌道１２を形成した内輪３を外嵌している。又、上記外輪４の内周面には、上記第一の内輪軌道１０と対向する第一の外輪軌道１４及び上記第二の内輪軌道１２に対向する第二の外輪軌道１５を形成している。そして、これら第一、第二の内輪軌道１０、１２と第一、第二の外輪軌道１４、１５との間に上記転動体５、５を、それぞれ複数個ずつ設けている。上記外輪４の両端部内周面と上記ハブ２及び内輪３の外周面との間にはシールリング２３、２３を設けて、上記転動体５、５設置部分に異物が進入したり、或はこの設置部分に充填されたグリースが外部に漏洩する事を防止している。尚、図示の例では、転動体５、５として玉を使用しているが、重量の嵩む自動車用のハブユニットの場合には、これら転動体としてテーパころを使用する場合もある。   The drive wheels of the automobile (the rear wheels of the FR vehicle, the front wheels of the FF vehicle, and all the wheels of the 4WD vehicle) are supported on the suspension device by the drive wheel support hub unit. The basic structure of such a drive wheel supporting hub unit will be briefly described with reference to an example of the embodiment of the present invention shown in FIG. The drive wheel support hub unit 1 includes a hub 2, an inner ring 3 (see FIG. 3; FIG. 1 shows an inner ring 13 according to the present invention), an outer ring 4, a plurality of rolling elements 5, 5. Of these, the hub 2 is formed in a substantially cylindrical shape as a whole, and has a female spline groove 6 formed on the inner peripheral surface thereof. The shaft 8 of the constant velocity joint 7 is inserted into the female spline groove 6 in the state of being assembled to the automobile. Further, the outer end of the outer peripheral surface of the hub 2 (outside means the side that is outward in the width direction when assembled to the automobile, and is the left side of each figure. The flange 9 for supporting the wheel is formed on the right side of each figure. Further, a first inner ring raceway 10 is formed at an intermediate portion of the hub 2, and a step portion 11 having a smaller outer diameter is formed at the inner end portion. And the inner ring | wheel 3 which formed the 2nd inner ring raceway 12 in the outer peripheral surface at this step part 11 is externally fitted. A first outer ring raceway 14 that faces the first inner ring raceway 10 and a second outer ring raceway 15 that faces the second inner ring raceway 12 are formed on the inner peripheral surface of the outer ring 4. . A plurality of rolling elements 5 and 5 are provided between the first and second inner ring raceways 10 and 12 and the first and second outer ring raceways 14 and 15, respectively. Seal rings 23, 23 are provided between the inner peripheral surfaces of both ends of the outer ring 4 and the outer peripheral surfaces of the hub 2 and the inner ring 3, and foreign matter enters the rolling elements 5, 5 installation part, The grease filled in the installation part is prevented from leaking outside. In the illustrated example, balls are used as the rolling elements 5 and 5. However, in the case of a heavy vehicle hub unit, tapered rollers may be used as these rolling elements.

上述の様な駆動輪支持用ハブユニットは、上記外輪４の外周面に外向フランジ状に形成した図示しない取付部により、この外輪４を懸架装置に固定し、上記フランジ９に車輪を固定する。又、ハブ２の内側に等速ジョイント７のシャフト８をスプライン係合させて、このハブ２及びこのハブ２に固定した車輪を回転駆動自在とする。上記シャフト８の先端部（図１の左端部）で上記ハブ２よりも外方に突出した部分にはナット２２を螺合させて、このシャフト８とハブ２とを結合する。   In the hub unit for driving wheel support as described above, the outer ring 4 is fixed to the suspension device and the wheel is fixed to the flange 9 by an attaching portion (not shown) formed on the outer peripheral surface of the outer ring 4 in the form of an outward flange. Further, the shaft 8 of the constant velocity joint 7 is spline-engaged inside the hub 2 so that the hub 2 and the wheel fixed to the hub 2 can be driven to rotate. A nut 22 is screwed into a portion protruding outward from the hub 2 at the tip end portion (left end portion in FIG. 1) of the shaft 8, and the shaft 8 and the hub 2 are coupled.

上述の様に構成され作用する駆動輪支持用ハブユニットの場合、ハブ２の内端部に形成した段部１１に内輪３を外嵌した後、この内輪３が不用意に脱落する事を防止する必要がある。この為従来は、上記ハブ２の内端部外周面に雄螺子部を形成すると共にこの雄螺子部にナット（図示せず）を螺合し、このナットと上記段部１１の段差面１６との間で、上記内輪３を挟持固定していた。又、上記ナットの内端面は、特許文献１に記載されている様に、上記ハブ１の内端面よりも内方に突出させて、自動車への組み付け状態でこのナットの内端面を、上記等速ジョイント７の本体部の外端面１７に突き当てて、このナットの弛み止めを図っていた。   In the case of the drive wheel support hub unit configured and operated as described above, the inner ring 3 is prevented from inadvertently falling off after the inner ring 3 is externally fitted to the step portion 11 formed at the inner end of the hub 2. There is a need to. For this reason, conventionally, a male screw portion is formed on the outer peripheral surface of the inner end portion of the hub 2 and a nut (not shown) is screwed into the male screw portion, and the nut and the step surface 16 of the step portion 11 are connected. The inner ring 3 was clamped and fixed between them. Further, as described in Patent Document 1, the inner end surface of the nut protrudes inward from the inner end surface of the hub 1, and the inner end surface of the nut in the state of being assembled to the automobile is The nut is abutted against the outer end surface 17 of the main body portion of the speed joint 7 to prevent the nut from loosening.

従来構造の様に、ナットによりハブ２と内輪３との分離防止を図る構造の場合には、部品としてナットが必要になるだけでなく、ハブ２の内端部外周面に雄螺子部を形成する作業、並びにこの雄螺子部にナットを螺合させる作業が必要になる。この為、駆動輪支持用ハブユニットの製作費が嵩んでしまう。   In the case of a structure in which the hub 2 and the inner ring 3 are prevented from being separated by a nut as in the conventional structure, not only a nut is required as a part but also a male screw part is formed on the outer peripheral surface of the inner end of the hub 2. And an operation of screwing a nut into the male screw portion are required. For this reason, the manufacturing cost of the hub unit for driving wheel support will increase.

この様な、ナットの存在に基づくコスト上昇を防止する為には、ハブ２の一部により上記内輪３をかしめ固定する事が考えられる。この様に、ハブの一部により内輪をかしめ固定する構造として従来から、例えば特許文献２に記載された構造が知られている。この特許文献２に記載された構造は、図３に示す様に、非駆動輪（ＦＲ車の前輪、ＦＦ車の後輪）を固定するハブ２ａの内端部を直径方向外方にかしめ広げ、このハブ２ａの段部１１に外嵌した内輪３を固定するものである。   In order to prevent such an increase in cost due to the presence of the nut, it is conceivable that the inner ring 3 is caulked and fixed by a part of the hub 2. As described above, for example, a structure described in Patent Document 2, for example, is known as a structure for caulking and fixing an inner ring by a part of a hub. As shown in FIG. 3, the structure described in Patent Document 2 squeezes the inner end of the hub 2 a that fixes non-driving wheels (the front wheel of the FR vehicle and the rear wheel of the FF vehicle) outward in the diameter direction. The inner ring 3 fitted on the step 11 of the hub 2a is fixed.

上記特許文献２に記載された構造の場合は、非駆動輪支持用ハブユニットを対象としているので、特に問題を生じないが、この構造を駆動輪支持用ハブユニットに適用した場合には、製造作業が相当に面倒になる事が避けられない。この理由は次の通りである。   In the case of the structure described in the above-mentioned Patent Document 2, there is no particular problem because the non-drive wheel support hub unit is targeted. However, when this structure is applied to a drive wheel support hub unit, it is manufactured. It is inevitable that the work is considerably troublesome. The reason is as follows.

駆動輪支持用ハブユニットの場合、ハブ若しくはこのハブと共に回転する部材の内端面は等速ジョイント７の本体部の外端面１７（図１、２参照）に、全周に亙って均等に突き当てる必要がある。この為、上記内端面を全周に亙って回転軸と垂直な面に一致させる必要がある。ハブ２ａの一部をかしめ広げる事により形成したかしめ部の形状はこの様な条件を満たさない為、かしめ後に所定の仕上げ加工を施す必要がある。この様な仕上げ加工は、駆動輪支持用ハブユニットの構成各部材を総て組み上げた後に行なう必要がある為、面倒な作業となり、製作費高騰の原因となる。   In the case of a drive wheel support hub unit, the inner end surface of the hub or a member that rotates together with the hub protrudes evenly over the entire circumference on the outer end surface 17 (see FIGS. 1 and 2) of the body portion of the constant velocity joint 7. It is necessary to hit. For this reason, it is necessary to match the inner end face with a plane perpendicular to the rotation axis over the entire circumference. Since the shape of the caulking portion formed by caulking and expanding a part of the hub 2a does not satisfy such a condition, it is necessary to perform a predetermined finishing process after caulking. Such a finishing process needs to be performed after assembling all the constituent members of the driving wheel supporting hub unit, which is a troublesome operation and causes an increase in production costs.

駆動輪支持用ハブユニットから内輪固定用のナットを省略できる構造としては、特許文献３、４に記載されたものがある。しかしながら、これら特許文献３、４に記載された構造の場合は何れも、等速ジョイントとして特殊な構造のものを使用する必要がある。この為、従来から一般的に使用されていた汎用の等速ジョイントが使用できなくなり、等速ジョイントの製作費の面から、コストが上昇する。   Patent Documents 3 and 4 disclose structures in which the inner ring fixing nut can be omitted from the drive wheel support hub unit. However, in any of the structures described in Patent Documents 3 and 4, it is necessary to use a special structure as a constant velocity joint. For this reason, a general-purpose constant velocity joint that has been generally used can no longer be used, and the cost increases in terms of the production cost of the constant velocity joint.

実開平４−８７０１８号公報Japanese Utility Model Publication No. 4-87018 米国特許第５２２６７３８号明細書US Pat. No. 5,226,738 米国特許第４８９３９６０号明細書US Pat. No. 4,893,960 ドイツ特許公報ＤＥ ３９２０２９９ Ａ１German Patent Publication DE 3920299 A1

本発明の駆動輪支持用ハブユニットの製造方法は上述の様な事情に鑑みて発明したもので、汎用の等速ジョイントを使用したまま、ハブに対し内輪を固定する為のナットを省略し、しかも面倒な仕上げ加工を不要としてコスト低減を図るものである。 The manufacturing method of the hub unit for driving wheel support of the present invention was invented in view of the above situation, omitting the nut for fixing the inner ring to the hub while using a general-purpose constant velocity joint, In addition, troublesome finishing is not required and cost reduction is achieved.

本発明の製造方法の対象となる駆動輪支持用ハブユニットは、従来の駆動輪支持用ハブユニットと同様に、内周面に雌スプライン溝を、外周面の外端部に車輪を支持する為のフランジを、同じく中間部に第一の内輪軌道を、同じく内端部に外径寸法が小さくなった段部を、それぞれ形成したハブと、この段部に外嵌された、外周面の外半部に第二の内輪軌道を形成すると共に外周面の内半部に円筒面部を形成した内輪と、内周面に上記第一の内輪軌道に対向する第一の外輪軌道及び上記第二の内輪軌道に対向する第二の外輪軌道を形成した外輪と、上記第一、第二の内輪軌道と上記第一、第二の外輪軌道との間に、それぞれ複数個ずつ設けられた転動体と、上記外輪の内端部内周面と上記内輪の上記円筒面部との間に設けたシールリングとを備える。 The drive wheel support hub unit which is the object of the manufacturing method of the present invention is to support the female spline groove on the inner peripheral surface and the wheel on the outer end portion of the outer peripheral surface in the same manner as the conventional drive wheel support hub unit. The hub is formed with the first inner ring raceway in the middle part, the stepped part with the outer diameter reduced at the inner end part, and the outer periphery of the outer peripheral surface . an inner ring forming a cylindrical surface portion on the inner half of the outer peripheral surface in the upper half to form a second inner ring raceway, inner said first peripheral surface a first opposite the inner raceway outer ring raceway and the second An outer ring that forms a second outer ring raceway facing the inner ring raceway, and a plurality of rolling elements provided between the first and second inner ring raceways and the first and second outer ring raceways, respectively. and a seal ring provided between the cylindrical surface of the inner end portion inner peripheral surface and the inner ring of the outer ring Obtain.

特に、本発明の駆動輪支持用ハブユニットの製造方法に於いては、上記ハブの内端部を揺動プレスで直径方向外方にかしめ広げる事によってかしめ部を形成し、このかしめ部により上記内輪を抑え付けて、この内輪を上記ハブに結合固定すると共に、この内輪の内端面を、上記かしめ部の加工後に仕上加工を施す事なく、このかしめ部を加工する以前のままの状態とし、且つ、上記内輪の軸心に対して垂直な平面であるこの内輪の内端面を上記かしめ部よりも内方に突出させる事により、自動車への組み付け状態で、等速ジョイントを構成して上記ハブに結合固定される、この等速ジョイントの本体部の外端面に、上記かしめ部が当接せずに上記内輪の内端面が当接する様にする。
In particular, in the method for manufacturing a hub unit for supporting a driving wheel of the present invention, a caulking portion is formed by caulking the inner end portion of the hub outward in the diameter direction with a rocking press, and the caulking portion forms the caulking portion. The inner ring is held down, the inner ring is coupled and fixed to the hub, and the inner end surface of the inner ring is left in a state before the caulking portion is processed without finishing after the caulking portion is processed. And, by projecting the inner end surface of the inner ring, which is a plane perpendicular to the axis of the inner ring, inward from the caulking portion , a constant velocity joint is configured in an assembled state in an automobile. The inner end surface of the inner ring is in contact with the outer end surface of the body portion of the constant velocity joint, which is fixedly coupled to the hub, without the caulking portion contacting .

上述の様な製造方法により造られる本発明の駆動輪支持用ハブユニットにより、懸架装置に対して駆動輪を回転自在に支持すると共に、この駆動輪にエンジンからの回転駆動力を伝達する際の作用は、従来の駆動輪支持用ハブユニットと同様である。
特に、本発明の駆動輪支持用ハブユニットの製造方法の場合には、ハブの内端部を直径方向外方にかしめ広げる事によって形成したかしめ部により、上記内輪を上記ハブに結合固定する為、内輪固定用のナットを省略して、コスト低減を図れる。又、上記内輪の内端面を上記かしめ部よりも内方に突出させる為、自動車への組み付け状態では、この内輪の内端面と等速ジョイントを構成する本体部の外端面とが当接し、上記かしめ部がこの外端面と当接する事はない。上記内輪の内端面は元々軸心に対して垂直な平面とされている為、上記外端面と当接する面を仕上げ加工する為の新たな手間も不要となり、この面からもコスト低減を図れる。
要するに、本発明の駆動輪支持用ハブユニットは、部品点数、部品加工、組立工数の減少により、コスト低減を図れる。 The driving wheel support hub unit of the present invention manufactured by the manufacturing method as described above supports the driving wheel rotatably with respect to the suspension device, and transmits the rotational driving force from the engine to the driving wheel. The operation is the same as that of a conventional drive wheel support hub unit.
In particular, in the case of the method for manufacturing a driving wheel supporting hub unit according to the present invention, the inner ring is coupled and fixed to the hub by a caulking portion formed by caulking the inner end portion of the hub outward in the diameter direction. By omitting the nut for fixing the inner ring, the cost can be reduced. Further, in order to make the inner end surface of the inner ring protrude inward from the caulking portion, the inner end surface of the inner ring and the outer end surface of the main body constituting the constant velocity joint are brought into contact with each other in the assembled state to the automobile. The caulking portion does not contact the outer end surface. Since the inner end surface of the inner ring is originally a plane perpendicular to the axis, new labor for finishing the surface in contact with the outer end surface is not required, and costs can be reduced from this surface.
In short, the drive wheel support hub unit of the present invention can reduce costs by reducing the number of parts, parts processing, and assembly man-hours.

［実施の形態の第１例］
図１は、本発明の実施の形態の第１例を示している。尚、本発明の特徴は、ハブ２に対して内輪１３を固定する部分の構造を製造する方法にある。その他の部分の構造及び作用に就いては、前述の従来技術の項で述べた通りであるから、重複する説明を省略若しくは簡略にし、以下、本発明の特徴部分を中心に説明する。 [First example of embodiment]
FIG. 1 shows a first example of an embodiment of the present invention. The feature of the present invention lies in the method of manufacturing the structure of the portion for fixing the inner ring 13 to the hub 2. Since the structure and operation of the other parts are as described in the above-mentioned section of the prior art, the overlapping description will be omitted or simplified, and the following description will focus on the characteristic parts of the present invention.

内輪１３の内端部内周面には、内径寸法が大きくなった第二の段部１８を設けている。この様な内輪１３をハブ２の内端部に形成した段部１１（第一の段部）に外嵌した状態で、この段部１１を形成する事によって他の部分よりも薄肉になった部分の内端部は、上記第二の段部１８の段差面２０よりも内方に突出する。この様に第二の段部１８の段差面２０よりも内方に突出した上記ハブ２の内端部を、例えば揺動プレスによって直径方向外方にかしめ広げる事によりかしめ部１９を形成し、このかしめ部１９により、上記段差面２０を抑え付けている。かしめ作業に揺動プレスを採用すれば、成形時の荷重を小さくして、軸受内部への影響をなくし、成形後の予圧管理を適正にできると言った利点がある。   On the inner peripheral surface of the inner end portion of the inner ring 13, a second step portion 18 having an increased inner diameter is provided. In such a state that the inner ring 13 is externally fitted to the step portion 11 (first step portion) formed on the inner end portion of the hub 2, the step portion 11 is formed to be thinner than other portions. The inner end portion of the portion protrudes inward from the step surface 20 of the second step portion 18. Thus, the caulking portion 19 is formed by caulking the inner end portion of the hub 2 protruding inward from the step surface 20 of the second step portion 18 outward in the diametrical direction by, for example, a rocking press, The stepped surface 20 is suppressed by the caulking portion 19. Adopting a rocking press for the caulking work has the advantage that the load during molding can be reduced, the influence on the inside of the bearing can be eliminated, and preload management after molding can be properly performed.

この様に上記かしめ部１９により第二の段部１８の段差面２０を抑え付けた状態で上記内輪１３は、このかしめ部１９と上記段部１１の段差面１６との間で挟持される。この結果、上記内輪１３が上記ハブ２に不離に結合固定される。この様に内輪１３をハブ２に結合固定した状態で、上記内輪１３の内端面２１は上記かしめ部１９よりも内方に突出している。   In this way, the inner ring 13 is sandwiched between the caulking portion 19 and the step surface 16 of the step portion 11 with the step surface 20 of the second step portion 18 held down by the caulking portion 19. As a result, the inner ring 13 is fixedly coupled to the hub 2 without separation. With the inner ring 13 coupled and fixed to the hub 2 in this way, the inner end surface 21 of the inner ring 13 protrudes inward from the caulking portion 19.

上述の様にして造られる本発明の駆動輪支持用ハブユニット１の場合には、ハブ２の内端部を直径方向外方にかしめ広げる事により形成した、言い換えればハブ２と一体のかしめ部１９により、上記内輪１３に形成した第二の段部１８を抑え付けて、上記内輪１３を上記ハブ２に結合固定している為、内輪固定用のナットを省略して、コスト低減を図れる。 In the case of the hub unit 1 for driving wheel support of the present invention manufactured as described above, the inner end portion of the hub 2 is formed by caulking outward in the diameter direction, in other words, the caulking portion integral with the hub 2. 19, the second step portion 18 formed on the inner ring 13 is suppressed and the inner ring 13 is coupled and fixed to the hub 2, so that the nut for fixing the inner ring can be omitted and the cost can be reduced.

又、上記内輪１３の内端面２１を上記かしめ部１９よりも内方に突出させている為、自動車への組み付け状態では、この内輪１３の内端面２１と等速ジョイント７を構成する本体部の外端面１７とが当接し、上記かしめ部１９がこの外端面１７と当接する事はない。上記内輪１３の内端面２１は元々軸心に対して垂直な平面とされている為、上記外端面１７と当接する面を仕上げ加工する為の新たな手間も不要となり、この面からもコスト低減を図れる。しかも、上記ハブ２と等速ジョイント７との結合構造は、従来と同様である為、この等速ジョイント７として従来から汎用的に使用されていたものをそのまま利用できる。従って、等速ジョイント７の構造を工夫する必要がなく、この面でコストが嵩む事もない。   In addition, since the inner end surface 21 of the inner ring 13 protrudes inward from the caulking portion 19, the body portion constituting the constant velocity joint 7 with the inner end surface 21 of the inner ring 13 is assembled in the automobile. The outer end surface 17 abuts, and the caulking portion 19 does not abut on the outer end surface 17. Since the inner end surface 21 of the inner ring 13 is originally a plane perpendicular to the axial center, a new labor for finishing the surface that contacts the outer end surface 17 is not required, and the cost can be reduced also from this surface. Can be planned. In addition, since the coupling structure between the hub 2 and the constant velocity joint 7 is the same as the conventional one, what has been conventionally used as the constant velocity joint 7 can be used as it is. Therefore, it is not necessary to devise the structure of the constant velocity joint 7, and the cost does not increase in this respect.

［実施の形態の第２例］
次に、図２は、本発明の実施の形態の第２例を示している。本例の駆動輪支持用ハブユニット１ａの場合には、内輪１３の内端部内周面に形成した第二の段部１８の段差面２０と、ハブ２の内端部に形成したかしめ部１９との間に、スペーサリング２４を挟持している。このスペーサリング２４は、上記ハブ２に外嵌自在な内径と、上記第二の段部１８に緩く挿入自在な外径とを有する。 [Second Example of Embodiment]
Next, FIG. 2 shows a second example of the embodiment of the present invention. In the case of the driving wheel supporting hub unit 1 a of this example, the step surface 20 of the second step portion 18 formed on the inner peripheral surface of the inner end portion of the inner ring 13 and the caulking portion 19 formed on the inner end portion of the hub 2. The spacer ring 24 is sandwiched between the two. The spacer ring 24 has an inner diameter that can be fitted onto the hub 2 and an outer diameter that can be loosely inserted into the second step portion 18.

本例の場合、この様なスペーサリング２４を設ける事により、上記かしめ部１９のかしめ強度を十分に大きくした場合でも、上記内輪１３が直径方向に弾性変形する事を確実に防止できる。即ち、上記かしめ部１９の形成時には、このかしめ部１９が隣接する部材の内周面に、直径方向外方に向いた力が加わる。上述した実施の形態の第１例の場合には、この力を内輪１３が受ける為、この内輪１３の直径が僅かとは言え変化する可能性がある。そして、この変化量が大きくなると、内輪１３の耐久性が損なわれたり、或は転動体５、５に付与した予圧を適正値に維持する作業が面倒になる可能性がある。従って、上記かしめ部１９のかしめ強さを厳密に規制する必要が生じ、面倒である。   In the case of this example, by providing such a spacer ring 24, it is possible to reliably prevent the inner ring 13 from being elastically deformed in the diametrical direction even when the caulking strength of the caulking portion 19 is sufficiently increased. That is, when the caulking portion 19 is formed, a force directed outward in the diameter direction is applied to the inner peripheral surface of the member adjacent to the caulking portion 19. In the case of the first example of the above-described embodiment, since the inner ring 13 receives this force, the diameter of the inner ring 13 may change although it is slight. If the amount of change increases, the durability of the inner ring 13 may be impaired, or the work of maintaining the preload applied to the rolling elements 5 and 5 at an appropriate value may be troublesome. Therefore, it is necessary to strictly regulate the caulking strength of the caulking portion 19, which is troublesome.

これに対して本例の場合には、内輪１３に形成した第二の段部１８の内側に緩く挿入されたスペーサリング２４が上記直径方向外方に向いた力を受ける為、上記内輪１３の直径が変化する事はない。この為、かしめ強さを厳密に規制しなくても、内輪１３の耐久性を確保でき、しかも上記予圧を適正値に維持する作業が容易になる。その他の構成及び作用は、前述した実施の形態の第１例と同様である為、同等部分には同一符号を付して、重複する説明を省略する。   On the other hand, in the case of this example, the spacer ring 24 loosely inserted inside the second step portion 18 formed on the inner ring 13 receives the force directed outward in the diametrical direction. The diameter never changes. For this reason, even if the caulking strength is not strictly regulated, the durability of the inner ring 13 can be ensured, and the operation of maintaining the preload at an appropriate value is facilitated. Since other configurations and operations are the same as those of the first example of the above-described embodiment, the same parts are denoted by the same reference numerals, and redundant description is omitted.

本発明の実施の形態の第１例を示す半部断面図。FIG. 2 is a half sectional view showing a first example of an embodiment of the present invention. 同第２例を示す半部断面図。Sectional sectional drawing which shows the 2nd example. 従来構造の１例を示す半部断面図。The half part sectional view showing an example of conventional structure.

符号の説明Explanation of symbols

１、１ａ 駆動輪支持用ハブユニット
２、２ａ ハブ
３ 内輪
４ 外輪
５ 転動体
６ 雌スプライン溝
７ 等速ジョイント
８ シャフト
９ フランジ
１０ 第一の内輪軌道
１１ （第一の）段部
１２ 第二の内輪軌道
１３ 内輪
１４ 第一の外輪軌道
１５ 第二の外輪軌道
１６ 段差面
１７ 外端面
１８ 第二の段部
１９ かしめ部
２０ 段差面
２１ 内端面
２２ ナット
２３ シールリング
２４ スぺーサリング DESCRIPTION OF SYMBOLS 1, 1a Drive wheel support hub unit 2, 2a Hub 3 Inner ring 4 Outer ring 5 Rolling element 6 Female spline groove 7 Constant velocity joint 8 Shaft 9 Flange 10 First inner ring raceway 11 (First) step part 12 Second Inner ring raceway 13 Inner ring 14 First outer ring raceway 15 Second outer ring raceway 16 Stepped surface 17 Outer end surface 18 Second stepped portion 19 Caulking portion 20 Stepped surface 21 Inner end surface 22 Nut 23 Seal ring 24 Spacer ring

Claims (1)

内周面に雌スプライン溝を、外周面の外端部に車輪を支持する為のフランジを、同じく中間部に第一の内輪軌道を、同じく内端部に外径寸法が小さくなった段部を、それぞれ形成したハブと、この段部に外嵌された、外周面の外半部に第二の内輪軌道を形成すると共に外周面の内半部に円筒面部を形成した内輪と、内周面に上記第一の内輪軌道に対向する第一の外輪軌道及び上記第二の内輪軌道に対向する第二の外輪軌道を形成した外輪と、上記第一、第二の内輪軌道と上記第一、第二の外輪軌道との間に、それぞれ複数個ずつ設けられた転動体と、上記外輪の内端部内周面と上記内輪の上記円筒面部との間に設けたシールリングとを備えた駆動輪支持用ハブユニットの製造方法に於いて、上記ハブの内端部を揺動プレスで直径方向外方にかしめ広げる事によってかしめ部を形成し、このかしめ部により上記内輪を抑え付けて、この内輪を上記ハブに結合固定すると共に、この内輪の内端面を、上記かしめ部の加工後に仕上加工を施す事なく、このかしめ部を加工する以前のままの状態とし、且つ、上記内輪の軸心に対して垂直な平面であるこの内輪の内端面を上記かしめ部よりも内方に突出させる事により、自動車への組み付け状態で、等速ジョイントを構成して上記ハブに結合固定される、この等速ジョイントの本体部の外端面に、上記かしめ部が当接せずに上記内輪の内端面が当接する様にする事を特徴とする駆動輪支持用ハブユニットの製造方法。 A female spline groove on the inner peripheral surface, a flange for supporting the wheel on the outer end of the outer peripheral surface, a first inner ring raceway in the middle, and a stepped portion with a smaller outer diameter at the inner end and a hub formed respectively, and an inner ring forming a cylindrical surface portion on the inner half of the outer peripheral surface with the stepped fitted on the unit, to form a second inner ring raceway on the outer half of the outer peripheral surface, the inner peripheral An outer ring having a surface formed with a first outer ring raceway facing the first inner ring raceway and a second outer ring raceway facing the second inner ring raceway, the first and second inner ring raceways and the first , A drive provided with a plurality of rolling elements each provided between the second outer ring raceway and a seal ring provided between the inner peripheral surface of the inner end portion of the outer ring and the cylindrical surface portion of the inner ring. In the manufacturing method of the wheel support hub unit, the inner end of the hub is moved outward in the diametrical direction by a rocking press. Forming a caulking portion by widening because, put suppress the inner ring by the caulking portion, the inner ring with coupling fixed to the hub, the inner end face of the inner ring is subjected to finishing operation after the processing of the crimped portion Without changing the caulking part as it was before processing , and by projecting the inner end surface of the inner ring, which is a plane perpendicular to the axis of the inner ring, inward from the caulking part , in the assembled state of the motor vehicle, constitute a constant velocity joint is coupled fixed to the hub, the outer end face of the body portion of the constant velocity joint, an inner end surface of the inner ring the crimped portion without contact are brought A manufacturing method of a hub unit for driving wheel support, characterized in that the contact is made.
JP2005294336A 2005-10-07 2005-10-07 Method for manufacturing hub unit for driving wheel support Expired - Fee Related JP4026656B2 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP32741195A Division JPH09164803A (en) 1995-12-15 1995-12-15 Driving wheel supporting hub unit

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WO2009078337A1 (en) * 2007-12-17 2009-06-25 Ntn Corporation Double-row angular bearing, bearing device for wheel, method of producing outer ring, and method of producing inner ring

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DE3418440A1 (en) * 1984-05-18 1985-11-21 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Wheel bearing unit with positively engaging connection of two annular parts which can be fitted one into the other
DE3636243A1 (en) * 1986-10-24 1988-05-11 Loehr & Bromkamp Gmbh WHEEL BEARING (NY) SMOOTH JOINT UNIT
JPH0810703Y2 (en) * 1990-12-07 1996-03-29 日本精工株式会社 Hub unit bearing device

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