JP2007040506A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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JP2007040506A
JP2007040506A JP2005227978A JP2005227978A JP2007040506A JP 2007040506 A JP2007040506 A JP 2007040506A JP 2005227978 A JP2005227978 A JP 2005227978A JP 2005227978 A JP2005227978 A JP 2005227978A JP 2007040506 A JP2007040506 A JP 2007040506A
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Prior art keywords
outer ring
inner diameter
bearing device
wheel
counter bore
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JP4627017B2 (en
Inventor
Hisashi Otsuki
寿志 大槻
Kikuo Fukada
貴久夫 深田
Takayasu Takubo
孝康 田窪
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • 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)
  • Manufacturing & Machinery (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel attaining a long service life of a bearing by preventing the formation of a scratch on a ball during assembling while forming a nonseparated structure with an inner ring not separated from an outer ring during transportation and handling. <P>SOLUTION: This bearing device for the wheel formed as a double row angular contact ball bearing with vertex of contact angles outside of bearing, has a counterbore part 9 with an inner diameter surface projected to the inner diameter side from a groove bottom diameter of an outer ring raceway surface 4 adjacently to the raceway surface 4 of an outer ring 1. The inner diameter surface 9a of the counterbore part 9 is a ground surface. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、自動車等の車輪を回転自在に支持する車輪用軸受装置に関する。   The present invention relates to a wheel bearing device that rotatably supports a wheel of an automobile or the like.

この種の車輪用軸受装置の一例（例えば特許文献１）を図９に示す。この車輪用軸受装置は、第１世代に分類される複列外向きアンギュラ玉軸受型のものであり、内周に複列の軌道面２４を有する外輪２１と、これら軌道面２４にそれぞれ対向する軌道面２５を有する内輪２２と、これら複列の軌道面２４，２５間に介在する複列のボール２３とを備える。内輪２２は２つの個別内輪２２Ａを軸方向に並べたものであり、ボール２３は各列毎に保持器２６で保持されている。外輪２１と内輪２２の間に形成される環状空間の両端は一対のシール２７，２８で密封される。   An example of this type of wheel bearing device (for example, Patent Document 1) is shown in FIG. This wheel bearing device is of the double-row outward angular ball bearing type classified as the first generation, and is opposed to the outer ring 21 having the double-row raceway surface 24 on the inner periphery and the raceway surfaces 24 respectively. An inner ring 22 having a raceway surface 25 and a double row ball 23 interposed between the double row raceway surfaces 24 and 25 are provided. The inner ring 22 has two individual inner rings 22A arranged in the axial direction, and the balls 23 are held by the holders 26 for each row. Both ends of the annular space formed between the outer ring 21 and the inner ring 22 are sealed with a pair of seals 27 and 28.

このように、転動体としてボールを用いた車輪用軸受装置では、搬送途中および自動車メーカの組立工程において、内輪が分離しない非分離構造が採用される。上記車輪用軸受装置の場合、非分離構造として、
（１）外輪２１および内輪２２に、軌道面２４，２５に隣接して軌道面２４，２５の溝底径よりも突出したカウンタボア部２９，３０が設けられ、軌道面２４，２５間に介在するボール２３が軸方向に抜脱するのをカウンタボア部２９，３０で阻止するようにしている。
車輪用軸受装置の非分離構造の他の例として、
（２）外輪にカウンタボア部を設けると共に、保持器の内径面に設けた爪を内輪に係合させ、ボールを介在させることにより非分離としたもの、
（３）軸方向に並んで内輪を構成する２つの個別内輪を連結リングで止めることで非分離としたもの、
等も知られている。これらの非分離構造のうち、（１）や（２）の構造が、経済性、組立性の観点から広く採用されている。 As described above, in the wheel bearing device using the ball as the rolling element, a non-separation structure in which the inner ring is not separated is adopted during the conveyance and in the assembly process of the automobile manufacturer. In the case of the wheel bearing device, as a non-separating structure,
(1) The outer ring 21 and the inner ring 22 are provided with counter bore portions 29 and 30 that are adjacent to the raceway surfaces 24 and 25 and protrude from the groove bottom diameter of the raceway surfaces 24 and 25, and are interposed between the raceway surfaces 24 and 25. The counter bores 29 and 30 prevent the ball 23 from being pulled out in the axial direction.
As another example of the non-separation structure of the wheel bearing device,
(2) A counter bore portion is provided on the outer ring, and a claw provided on the inner diameter surface of the cage is engaged with the inner ring and non-separated by interposing a ball,
(3) Non-separated by stopping two individual inner rings constituting the inner ring side by side with the connecting ring in the axial direction;
Etc. are also known. Among these non-separated structures, the structures (1) and (2) are widely adopted from the viewpoints of economy and assemblability.

上記（１），（２）の非分離構造を採用するには外輪に溝底径よりも突出したカウンタボア部を設けることが不可欠の条件となる。この場合は、軸受組立工程において、ボール・保持器のアッセンブリが外輪カウンタボア部を通過して軸受軌道部に挿入される。すなわち、図９の車輪用軸受装置の場合、軸受組立工程は以下の通りである。
ａ）外輪２１の内径面側にボール２３と保持器２６のアッセンブリを挿入。
ｂ）軸受内輪２２Ａを挿入。
ｃ）グリースを封入。
ｄ）シール２７，２８を圧入。
特開平１０−２６０１９５号公報 In order to adopt the non-separated structure of (1) and (2) above, it is an indispensable condition to provide a counterbore portion protruding from the groove bottom diameter on the outer ring. In this case, in the bearing assembly process, the ball and cage assembly passes through the outer ring counter bore portion and is inserted into the bearing race portion. That is, in the case of the wheel bearing device of FIG. 9, the bearing assembly process is as follows.
a) Insert the assembly of the ball 23 and the cage 26 into the inner surface of the outer ring 21.
b) Insert the bearing inner ring 22A.
c) Enclose grease.
d) Press-fit the seals 27 and 28.
Japanese Patent Laid-Open No. 10-260195

ところで、上記軸受組立工程において、ボール・保持器アッセンブリを外輪２１の内径面側に挿入する場合、図１０に拡大して示すように外輪２１のカウンタボア部２９をボール２３が通過するが、通常、カウンタボア部２９の内径面２９ａは旋削加工であるため、加工痕が残っている。その結果、ボール２３が旋削加工痕を有するカウンタボア部内径面２９ａを通過する際に、ボール表面に擦り傷が発生することがある。この傷は、軸受回転時に軌道輪に対して有害であり、軸受短寿命の原因となる。   By the way, when the ball and cage assembly is inserted into the inner surface of the outer ring 21 in the bearing assembly process, the ball 23 passes through the counter bore portion 29 of the outer ring 21 as shown in an enlarged view in FIG. Since the inner diameter surface 29a of the counterbore part 29 is a turning process, a processing mark remains. As a result, when the ball 23 passes through the counter bore inner diameter surface 29a having a turning mark, a scratch may occur on the ball surface. This damage is harmful to the raceway during rotation of the bearing and causes a short bearing life.

この発明の目的は、運搬中や取り扱い時に内輪が外輪に対して分離しない非分離構造としながら、組立時にボールに擦り傷が発生するのを防止して軸受長寿命化を可能とできる車輪用軸受装置を提供することである。   SUMMARY OF THE INVENTION An object of the present invention is to provide a wheel bearing device capable of extending the bearing life by preventing the ball from being scratched during assembly while having a non-separation structure in which the inner ring is not separated from the outer ring during transportation and handling. Is to provide.

この発明の車輪用軸受装置は、複列外向きアンギュラ玉軸受型とされ、外輪の軌道面に隣接して、内径面が外輪軌道面の溝底径よりも内径側に突出したカウンタボア部を有する車輪用軸受装置において、前記カウンタボア部の内径面を研削加工面としたことを特徴とする。
この構成によると、カウンタボア部が外輪軌道面の溝底径よりも内径側に突出しているため、内輪が外輪に対して分離しない非分離構造とできる。カウンタボア部は外輪軌道面の溝底径よりも内径側に突出しているが、カウンタボア部の内径面は研削加工面とされていて旋削加工痕が無くなっているので、組立工程におけるボール・保持器アッセンブリの挿入で、ボールに擦り傷が発生するのを防止できる。そのため、組み立て時に擦り傷が発生したボールが起因となる車輪用軸受装置の短寿命化を回避することができる。 The wheel bearing device of the present invention is a double-row outward angular contact ball bearing type, and has a counter bore portion that is adjacent to the raceway surface of the outer ring and whose inner diameter surface projects to the inner diameter side of the groove bottom diameter of the outer ring raceway surface. The wheel bearing device according to the present invention is characterized in that an inner diameter surface of the counter bore portion is a ground surface.
According to this configuration, since the counterbore portion protrudes toward the inner diameter side of the groove bottom diameter of the outer ring raceway surface, a non-separation structure in which the inner ring is not separated from the outer ring can be achieved. The counterbore part protrudes to the inner diameter side of the groove bottom diameter of the outer ring raceway surface, but the inner diameter surface of the counterbore part is a grinding surface and there are no turning traces. It is possible to prevent the ball from being scratched by inserting the instrument assembly. For this reason, it is possible to avoid shortening the service life of the wheel bearing device due to the balls that are scratched during assembly.

この発明において、前記外輪は、内径面における前記カウンタボア部よりも端部側に、前記カウンタボア部の内径よりも大径のシール取付用面を有するものであっても良い。また、外輪の前記カウンタボア部の内径面が、軌道面、およびシール取付用面と同時研削されたものであっても良い。
このように、外輪カウンタボア部の内径面を、軌道面、およびシール取付用面と同時研削すると、研削加工時に各面の相互間で軸心等のずれが生じることが回避され、各面の相互間の精度が高精度化される。また、同時研削によるため、外輪カウンタボア部の内径面を研削するために、専用の加工工程を付加する必要がなく、そのためコスト増が抑えられる。 In the present invention, the outer ring may have a seal mounting surface having a diameter larger than the inner diameter of the counter bore portion on the end side of the counter bore portion on the inner diameter surface. Further, the inner diameter surface of the counter bore portion of the outer ring may be ground at the same time as the raceway surface and the seal mounting surface.
In this way, when the inner diameter surface of the outer ring counterbore portion is ground simultaneously with the raceway surface and the seal mounting surface, it is possible to avoid the occurrence of misalignment of the shaft center between the surfaces during grinding. The accuracy between each other is increased. Further, since simultaneous grinding is performed, it is not necessary to add a dedicated processing step to grind the inner diameter surface of the outer ring counterbore portion, so that an increase in cost can be suppressed.

この発明の車輪用軸受装置の製造方法は、複列外向きアンギュラ玉軸受型の車輪用軸受装置において、外輪の軌道面に隣接して、内径面が外輪軌道面の溝底径よりも内径側に突出したカウンタボア部を有し、このカウンタボア部よりも端部側に前記カウンタボア部の内径よりも大径のシール取付用面を有し、前記カウンタボア部の内径面、軌道面、およびシール取付用面が研削加工面とされた車輪用軸受装置の製造方法であって、これらカウンタボア部の内径面、軌道面、およびシール取付用面を、同じ砥石の各部分で同時研削することを特徴とする。
この方法によると、内外輪が分離しない非分離構造でありながら、組立時にボールに擦り傷が発生するのを防止して軸受長寿命化を可能とする車輪用軸受装置が製造でき、また外輪の各面間に高精度が得られ、かつ外輪カウンタボア部の内径面を研削する工程として専用の加工工程を付加する必要がなくて、コスト増が抑えられる。 The wheel bearing device manufacturing method according to the present invention is a double-row outward angular ball bearing type wheel bearing device, wherein the inner surface is adjacent to the raceway surface of the outer ring and is closer to the inner diameter side than the groove bottom diameter of the outer ring raceway surface. A counter-bore part protruding to the end side of the counter-bore part, and a counter-mounting surface larger than the inner diameter of the counter-bore part. And a method for manufacturing a wheel bearing device in which the seal mounting surface is a ground surface, and the inner diameter surface, the raceway surface, and the seal mounting surface of the counter bore portion are simultaneously ground by each portion of the same grindstone. It is characterized by that.
According to this method, it is possible to manufacture a wheel bearing device that can prevent the ball from being scratched during assembly and increase the life of the bearing while having a non-separable structure in which the inner and outer rings are not separated. A high accuracy can be obtained between the faces, and it is not necessary to add a dedicated processing step as a step of grinding the inner diameter surface of the outer ring counterbore portion, thereby suppressing an increase in cost.

この発明の車輪用軸受装置は、複列外向きアンギュラ玉軸受型とされ、外輪の軌道面に隣接して、内径面が外輪軌道面の溝底径よりも内径側に突出したカウンタボア部を有する車輪用軸受装置において、前記カウンタボア部の内径面を研削加工面としたため、運搬時や取り扱い時に内輪が分離しない非分離構造としながら、組立時にボールに擦り傷が発生するのが防止され、軸受長寿命化が可能となる。
この発明の車輪用軸受装置の製造方法は、複列外向きアンギュラ玉軸受型の車輪用軸受装置において、外輪の軌道面に隣接して、内径面が外輪軌道面の溝底径よりも内径側に突出したカウンタボア部を有し、このカウンタボア部よりも端部側に前記カウンタボア部の内径よりも大径のシール取付用面を有し、前記カウンタボア部の内径面、軌道面、およびシール取付用面が研削加工面とされた車輪用軸受装置の製造方法であって、これらカウンタボア部の内径面、軌道面、およびシール取付用面を、同じ砥石の各部分で同時研削するので、内外輪が分離しない非分離構造でありながら、組立時にボールに擦り傷が発生するのを防止して軸受長寿命化を可能とする車輪用軸受装置が製造でき、また外輪の各面間に高精度が得られ、かつ外輪カウンタボア部の内径面を研削する工程として専用の加工工程を付加する必要がなくて、コスト増が抑えられる。 The wheel bearing device of the present invention is a double-row outward angular contact ball bearing type, and has a counter bore portion that is adjacent to the raceway surface of the outer ring and whose inner diameter surface projects to the inner diameter side of the groove bottom diameter of the outer ring raceway surface. Since the inner diameter surface of the counterbore part is a ground surface in the wheel bearing device having the non-separation structure in which the inner ring is not separated during transportation or handling, the ball is prevented from being scratched during assembly. Long service life is possible.
The wheel bearing device manufacturing method according to the present invention is a double-row outward angular ball bearing type wheel bearing device, wherein the inner surface is adjacent to the raceway surface of the outer ring and is closer to the inner diameter side than the groove bottom diameter of the outer ring raceway surface. A counter-bore part protruding to the end side of the counter-bore part, and a counter-mounting surface larger than the inner diameter of the counter-bore part. And a method for manufacturing a wheel bearing device in which the seal mounting surface is a ground surface, and the inner diameter surface, the raceway surface, and the seal mounting surface of the counter bore portion are simultaneously ground by each portion of the same grindstone. Therefore, it is possible to manufacture a wheel bearing device that can prevent the ball from being scratched during assembly and increase the life of the bearing while having a non-separated structure in which the inner and outer rings are not separated. High accuracy and outer ring cowl Without the need to add a special processing step as a step of grinding the inner surface of the Taboa unit, cost increase can be suppressed.

この発明の第１の実施形態を図１ないし図４と共に説明する。この実施形態の車輪用軸受装置Ａは、第１世代に分類される複列外向きアンギュラ玉軸受型のものである。この車輪用軸受装置Ａは、内周に複列の軌道面４を有する外輪１と、これら軌道面４にそれぞれ対向する軌道面５を有する内輪２と、これら複列の軌道面４，５間に介在する複列のボール３とを備える。内輪２は、２つの個別内輪２Ａを軸方向に並べたものである。ボール３は、各列毎に保持器６で保持されている。内外輪２，１間に形成される環状空間の両端は一対のシール７，８で密封されている。   A first embodiment of the present invention will be described with reference to FIGS. The wheel bearing device A of this embodiment is of the double-row outward angular ball bearing type classified as the first generation. This wheel bearing device A includes an outer ring 1 having a double row raceway surface 4 on an inner periphery, an inner ring 2 having a raceway surface 5 facing each of the raceway surfaces 4, and the double row raceway surfaces 4, 5. And a double row of balls 3 interposed therebetween. The inner ring 2 is formed by arranging two individual inner rings 2A in the axial direction. The balls 3 are held by the cage 6 for each row. Both ends of the annular space formed between the inner and outer rings 2 and 1 are sealed with a pair of seals 7 and 8.

外輪１の内径面には、各列の軌道面４に隣接して軌道面４の底径より内径側に突出したカウンタボア部９が設けられ、かつ内輪２の外径面に、各列の軌道面５に隣接して軌道面５の底径より外径側に突出したカウンタボア部３９が設けられている。各カウンタボア部９，３９は、一般的なアンギュラ玉軸受で設けられる各軌道面４，５の溝底と同径のカウンタボア部よりも、内径側または外径側へそれぞれ突出する段差部として設けられたものである。これらカウンタボア部９，３９により、軌道面４，５間に介在するボール３が軸方向に抜脱するのを阻止するようにしている。   On the inner diameter surface of the outer ring 1, a counter bore portion 9 is provided adjacent to the raceway surface 4 of each row and protrudes from the bottom diameter of the raceway surface 4 toward the inner diameter side. A counter bore portion 39 is provided adjacent to the raceway surface 5 and projecting to the outer diameter side from the bottom diameter of the raceway surface 5. The counter bore portions 9 and 39 are stepped portions that protrude to the inner diameter side or the outer diameter side from the counter bore portions having the same diameter as the groove bottoms of the raceway surfaces 4 and 5 provided in a general angular contact ball bearing. It is provided. These counter bore portions 9 and 39 prevent the balls 3 interposed between the raceway surfaces 4 and 5 from being pulled out in the axial direction.

図２は、図１における外輪１の左端側を拡大して示す。同図において、外輪２の各カウンタボア部９の内径面９ａは研削加工面とされている。外輪１の内径面における各カウンタボア部９よりも端部側には、カウンタボア部９の内径よりも大径のシール取付用面１ａが形成され、これらのシール取付用面１ａに前記シール７，８が取付けられる。すなわち、図２においてシール取付用面１ａの溝部１ａａの内径側に突出する肩部として左列側のカウンタボア部９が設けられている。右列側のカウンタボア部９とシール取付用面１ａの関係については拡大図を省略するが、前記した左列側と同様の構造とされている。   FIG. 2 shows an enlarged view of the left end side of the outer ring 1 in FIG. In the figure, an inner diameter surface 9a of each counter bore portion 9 of the outer ring 2 is a ground surface. A seal mounting surface 1a having a diameter larger than the inner diameter of the counter bore portion 9 is formed on the inner diameter surface of the outer ring 1 on the end side of each counter bore portion 9, and the seal 7 is formed on these seal mounting surfaces 1a. , 8 are attached. That is, in FIG. 2, the counter bore portion 9 on the left column side is provided as a shoulder portion protruding toward the inner diameter side of the groove portion 1aa of the seal mounting surface 1a. Although the enlarged view of the relationship between the counter bore portion 9 on the right column side and the seal mounting surface 1a is omitted, the structure is the same as that on the left column side.

なお、図１の右側のシール８は、シール部材８Ａと、このシール部材８Ａが摺接するスリンガ８Ｂとでなり、シール部材８Ａが外輪１の前記シール取付用面１ａに取付けられている。スリンガ８Ｂは軸受内輪２Ａの外径面に取付けられ、回転検出用の磁気エンコーダ４０が一体に設けられている。   1 includes a seal member 8A and a slinger 8B in which the seal member 8A is in sliding contact, and the seal member 8A is attached to the seal attachment surface 1a of the outer ring 1. The slinger 8B is attached to the outer diameter surface of the bearing inner ring 2A, and a magnetic encoder 40 for detecting rotation is integrally provided.

この構成の車輪用軸受装置Ａは、上記のように外・内輪１，２のカウンタボア部９，３９により、軌道面４，５間に介在するボール３が軸方向に抜脱するのが阻止され、これにより、搬送途中および自動車メーカの組立工程において、内輪２が外輪１に対して分離しない非分離構造とされる。   The wheel bearing device A having this configuration prevents the balls 3 interposed between the raceway surfaces 4 and 5 from being pulled out in the axial direction by the counter bore portions 9 and 39 of the outer and inner rings 1 and 2 as described above. Thus, a non-separation structure in which the inner ring 2 is not separated from the outer ring 1 in the course of conveyance and in the assembly process of the automobile manufacturer is obtained.

この車輪用軸受装置Ａの組み立ては、ボール３と保持器６のアッセンブリを外輪１の各 列の軌道面４に挿入してから、各列に対応する各軸受内輪２Ａを挿入する。ついで、グリースを封入した後に、シール７，８を圧入するという工程で行われる。この組立工程におけるボール・保持器アッセンブリの挿入では、例えば外輪１の左端側からの挿入例を示す図３のように、ボール３が外輪１のカウンタボア部９を通過する。このとき、図３の一部を拡大して示す図４のように、カウンタボア部９の内径面９ａは研削加工面とされていて旋削の加工痕が無くなっているので、ボール３に擦り傷が発生するのを防止できる。このように、組立工程でのボール３の傷発生を無くすことができるため、ボール３の傷によって軸受装置Ａが短寿命化するのを回避することができる。   In the assembly of the wheel bearing device A, the assembly of the ball 3 and the cage 6 is inserted into the raceway surface 4 of each row of the outer ring 1, and then each bearing inner ring 2A corresponding to each row is inserted. Next, after sealing the grease, the seals 7 and 8 are press-fitted. In the insertion of the ball and cage assembly in this assembly process, the ball 3 passes through the counterbore portion 9 of the outer ring 1 as shown in FIG. 3 showing an example of insertion from the left end side of the outer ring 1. At this time, as shown in FIG. 4 which is an enlarged view of a part of FIG. 3, the inner diameter surface 9 a of the counterbore portion 9 is a grinding surface and there is no turning processing trace. It can be prevented from occurring. As described above, since it is possible to eliminate the occurrence of scratches on the balls 3 in the assembly process, it is possible to avoid shortening the life of the bearing device A due to the scratches on the balls 3.

図５は、外輪１のカウンタボア部９の内径面９ａを研削加工面とする加工方法の一例を示す。この加工方法では、外輪１のカウンタボア部９の内径面９ａを、軌道面４、およびシール取付用面１ａと共に、同じ砥石２０の各部分で同時研削する。砥石２０は、これら各面９ａ，４，１ａの仕上がり状態の断面形状に沿う断面形状の外径面を持つものである。このように、同じ砥石２０でカウンタボア部９の内径面９ａを、軌道面４、およびシール取付用面１ａと共に同時研削することにより、研削加工時に各面９ａ，４，１ａの相互間で軸心等のずれが生じることが回避され、各面９ａ，４，１ａの相互間の精度が高精度化される。また同時研削によると、カウンタボア部９の内径面９ａを研削するための専用の加工工程を付加しなくて済み、コスト増となるのを抑えられる。   FIG. 5 shows an example of a processing method in which the inner diameter surface 9a of the counterbore portion 9 of the outer ring 1 is a ground surface. In this processing method, the inner diameter surface 9a of the counterbore part 9 of the outer ring 1 is simultaneously ground on each part of the same grindstone 20 together with the raceway surface 4 and the seal mounting surface 1a. The grindstone 20 has an outer diameter surface having a cross-sectional shape along the finished cross-sectional shape of each of the surfaces 9a, 4, 1a. In this way, by simultaneously grinding the inner diameter surface 9a of the counterbore portion 9 together with the raceway surface 4 and the seal mounting surface 1a with the same grindstone 20, the shafts between the surfaces 9a, 4 and 1a can be connected to each other during grinding. It is possible to avoid the shift of the center and the like, and the accuracy between the surfaces 9a, 4 and 1a is increased. Moreover, according to the simultaneous grinding, it is not necessary to add a dedicated processing step for grinding the inner diameter surface 9a of the counterbore part 9, and it is possible to suppress an increase in cost.

図６は、この発明の他の実施形態を示す。この車輪用軸受装置Ｂは、第２世代に分類される複列外向きアンギュラ玉軸受型であり、外輪回転タイプでかつ従動輪支持用のものである。この車輪用軸受装置Ｂは、内周に複列の軌道面４を有するハブ輪となる外輪１と、これら軌道面４にそれぞれ対向する軌道面５を有する内輪２と、これら複列の軌道面４，５間に介在する複列のボール３とを備える。外輪１は、外周に車輪取付用のフランジ１ｂを有する。車両への組付けにおいて、前記フランジ１ｂには、そのボルト挿通孔１２に圧入固定されたハブボルト１３、およびこのハブボルト１３に螺合するハブナット（図示せず）により、ブレーキ装置のブレーキロータと車輪（いずれも図示せず）とが重ねて取付けられる。内輪２が２つの個別内輪２Ａを軸方向に並べたものであることは、先の実施形態の場合と同じである。この内輪２の内径面に車軸（図示せず）が固定される。ボール３は、各列毎に保持器６で保持されている。内外輪２，１間に形成される環状空間の両端は一対のシール７，８で密封されている。   FIG. 6 shows another embodiment of the present invention. This wheel bearing device B is a double-row outward angular contact ball bearing type classified as the second generation, and is an outer ring rotating type and for supporting a driven wheel. The wheel bearing device B includes an outer ring 1 serving as a hub ring having double-row raceway surfaces 4 on an inner periphery, an inner ring 2 having raceway surfaces 5 respectively opposed to the raceway surfaces 4, and these double-row raceway surfaces. And double-row balls 3 interposed between four and five. The outer ring 1 has a wheel mounting flange 1b on the outer periphery. In the assembly to the vehicle, the flange 1b is provided with a hub bolt 13 press-fitted in the bolt insertion hole 12 and a hub nut (not shown) screwed into the hub bolt 13 so that a brake rotor and a wheel ( (None of them are shown in the figure). The inner ring 2 is formed by arranging two individual inner rings 2A in the axial direction as in the previous embodiment. An axle (not shown) is fixed to the inner diameter surface of the inner ring 2. The balls 3 are held by the cage 6 for each row. Both ends of the annular space formed between the inner and outer rings 2 and 1 are sealed with a pair of seals 7 and 8.

この車輪用軸受装置Ｂにおいても、内輪非分離構造として、外輪１の各列の軌道面４に隣接して、軌道面４の溝底径よりも内径側に突出したカウンタボア部９が設けられ、また内輪２の各列の軌道面５に隣接して、軌道面５の溝底径よりも外径側に突出したカウンタボア部３９が設けられる。外輪１のカウンタボア部９の内径面が研削加工面とされることは図１の実施形態の場合と同じである。   Also in this wheel bearing device B, as an inner ring non-separating structure, a counter bore portion 9 is provided adjacent to the raceway surface 4 of each row of the outer race 1 and projecting to the inner diameter side of the groove bottom diameter of the raceway surface 4. Further, adjacent to the raceway surface 5 of each row of the inner ring 2, a counter bore portion 39 that protrudes to the outer diameter side from the groove bottom diameter of the raceway surface 5 is provided. The inner diameter surface of the counter bore portion 9 of the outer ring 1 is the ground surface as in the embodiment of FIG.

図７は、この発明のさらに他の実施形態を示す。この実施形態の車輪用軸受装置Ｃは、第３世代に分類される複列外向きアンギュラ玉軸受型であり、内輪回転タイプでかつ駆動輪支持用のものである。この車輪用軸受装置Ｃは、内周に複列の軌道面４を有する外輪１と、これら各軌道面４に対向する軌道面５を有する内輪２と、これら内外輪２，１の軌道面４，５間に介在した複列のボール３とを備える。ボール３は、各列毎に保持器６で保持されている。内外輪２，１間の軸受空間の両端は、シール７，８によりそれぞれ密封されている。   FIG. 7 shows still another embodiment of the present invention. The wheel bearing device C of this embodiment is a double-row outward angular contact ball bearing type classified as the third generation, and is an inner ring rotating type and for driving wheel support. This wheel bearing device C includes an outer ring 1 having a double row raceway surface 4 on an inner periphery, an inner ring 2 having a raceway surface 5 opposed to each raceway surface 4, and the raceway surfaces 4 of these inner and outer rings 2, 1. , 5 and a double row of balls 3 interposed between them. The balls 3 are held by the cage 6 for each row. Both ends of the bearing space between the inner and outer rings 2 and 1 are sealed by seals 7 and 8, respectively.

外輪１は固定側の部材となるものであって、車体取付フランジ（図示せず）を外周に有し、その車体取付フランジが車体に設置されたナックルにボルト（いずれも図示せず）で締結される。内輪２は回転側の部材となるものであって、外周に車輪取付用のフランジ１０ａを有するハブ輪１０と、このハブ輪１０のインボード側端の外周に嵌合した個別内輪１１とでなる。前記複列の軌道面５におけるアウトボード側列の軌道面５がハブ輪１０に、インボード側列の軌道面５が内輪単体１１にそれぞれ形成されている。ハブ輪１０はインボード側端の外周に段差部とされた内輪嵌合面１０ｂを有し、この内輪嵌合面１０ｂに個別内輪１１が嵌合する。ハブ輪１０のフランジ１０ａには、そのボルト挿通孔１２に圧入されたハブボルト１３、およびこのハブボルト１３に螺合するハブナット（図示せず）により、ブレーキ装置のブレーキロータと車輪（いずれも図示せず）とが重ねて取付けられる。   The outer ring 1 is a member on the fixed side and has a vehicle body mounting flange (not shown) on the outer periphery, and the vehicle body mounting flange is fastened with a bolt (none of which is shown) to a knuckle installed on the vehicle body. Is done. The inner ring 2 is a member on the rotation side, and includes a hub wheel 10 having a wheel mounting flange 10a on the outer periphery, and an individual inner ring 11 fitted to the outer periphery of the inboard side end of the hub wheel 10. . Outboard side raceway surfaces 5 of the double row raceway surfaces 5 are formed on the hub wheel 10, and inboard side row raceway surfaces 5 are formed on the inner ring unit 11, respectively. The hub wheel 10 has an inner ring fitting surface 10b which is a stepped portion on the outer periphery of the inboard side end, and the individual inner ring 11 is fitted to the inner ring fitting surface 10b. The flange 10a of the hub wheel 10 includes a hub bolt 13 press-fitted into the bolt insertion hole 12 and a hub nut (not shown) that is screwed into the hub bolt 13 so that the brake rotor and wheels of the brake device (both not shown). ) And are attached in layers.

ハブ輪１０は中央孔１９を有し、この中央孔１９に、等速ジョイント１４の片方の継手部材となる外輪１５のステム部１５ａが挿通されてスプライン嵌合され、ステム部１５ａの先端に螺合するナット１６の締め付けにより、等速ジョント外輪１５が内輪２に結合される。このとき、等速ジョイント外輪１５に設けられたアウトボード側に向く段面１５ｂが、内輪単体１１のインボード側に向く端面１１ａに押し付けられ、等速ジョイント外輪１５とナット１６とで内輪２が幅締めされる。   The hub wheel 10 has a center hole 19, and a stem portion 15 a of an outer ring 15 which is one joint member of the constant velocity joint 14 is inserted into the center hole 19 and is spline-fitted, and is screwed to the tip of the stem portion 15 a. By tightening the nut 16 to be joined, the constant velocity outer outer ring 15 is coupled to the inner ring 2. At this time, the step surface 15 b facing the outboard side provided in the constant velocity joint outer ring 15 is pressed against the end surface 11 a facing the inboard side of the inner ring alone 11, and the inner ring 2 is formed by the constant velocity joint outer ring 15 and the nut 16. It is tightened.

この車輪用軸受装置Ｃにおいては、外輪１に挿入したボール・保持器アッセンブリが軸受組立工程で外輪１から脱落しないように、外輪１の各列の軌道面４に隣接して、軌道面４の溝底径よりも内径側に突出したカウンタボア部９が設けられる。外輪１のカウンタボア部９の内径面が研削加工面とされることは図１の実施形態の場合と同じである。   In the wheel bearing device C, the ball and cage assembly inserted into the outer ring 1 is adjacent to the raceway surface 4 of each row of the outer ring 1 so that the ball and cage assembly does not fall off from the outer ring 1 in the bearing assembly process. A counter bore portion 9 is provided that protrudes toward the inner diameter side of the groove bottom diameter. The inner diameter surface of the counter bore portion 9 of the outer ring 1 is the ground surface as in the embodiment of FIG.

図８は、この発明のさらに他の実施形態を示す。この実施形態の車輪用軸受装置Ｄは、第４世代に分類される複列外向きアンギュラ玉軸受型であり、内輪回転タイプでかつ駆動輪支持用のものである。この車輪用軸受装置Ｄは、内周に複列の軌道面４を有する外輪１と、これら各軌道面４に対向する軌道面５を有する内輪２と、これら内外輪２，１の軌道面４，５間に介在した複列のボール３とを備える。ボール３は、各列毎に保持器６で保持されている。内外輪２，１間の軸受空間の両端は、シール７，８によりそれぞれ密封されている。   FIG. 8 shows still another embodiment of the present invention. The wheel bearing device D of this embodiment is a double-row outward angular contact ball bearing type classified as the fourth generation, and is an inner ring rotating type and for driving wheel support. The wheel bearing device D includes an outer ring 1 having a double row raceway surface 4 on an inner periphery, an inner ring 2 having a raceway surface 5 opposed to each raceway surface 4, and the raceway surfaces 4 of the inner and outer rings 2, 1. , 5 and a double row of balls 3 interposed between them. The balls 3 are held by the cage 6 for each row. Both ends of the bearing space between the inner and outer rings 2 and 1 are sealed by seals 7 and 8, respectively.

外輪１は固定側の部材となるものであって、車体取付フランジ１ｃを外周に有し、その車体取付フランジ１ｃのボルト挿通孔１７を貫通するナックルボルト（図示せず）により、車体取付フランジ１ｃが車体に設置されたナックル（図示せず）に締結される。
内輪２は回転側の部材となるものであって、アウトボード側端に車輪取付用のフランジ１０ａを有するハブ輪１０と、このハブ輪１０の中央孔１９に挿入されて嵌合する等速ジョイント外輪１５とでなる。前記複列の軌道面５におけるアウトボード側列の軌道面５がハブ輪１０に、インボード側列の軌道面５が等速ジョイント外輪１５にそれぞれ形成されている。ハブ輪１０のフランジ１０ａには、そのボルト挿通孔１２に圧入固定されたハブボルト１３、およびこのハブボルト１３に螺合するハブナット（図示せず）により、ブレーキ装置のブレーキロータと車輪（いずれも図示せず）とが重ねて取付けられる。 The outer ring 1 is a member on the fixed side, and has a vehicle body mounting flange 1c on the outer periphery, and a vehicle body mounting flange 1c by a knuckle bolt (not shown) penetrating the bolt insertion hole 17 of the vehicle body mounting flange 1c. Is fastened to a knuckle (not shown) installed on the vehicle body.
The inner ring 2 is a member on the rotation side, and has a hub wheel 10 having a wheel mounting flange 10a at an end on the outboard side, and a constant velocity joint that is inserted into and fitted in the central hole 19 of the hub wheel 10. It consists of an outer ring 15. Outboard side raceway surfaces 5 of the double row raceway surfaces 5 are formed on the hub wheel 10, and inboard side row raceway surfaces 5 are formed on the constant velocity joint outer ring 15. The flange 10a of the hub wheel 10 includes a hub bolt 13 press-fitted and fixed to the bolt insertion hole 12 and a hub nut (not shown) that is screwed into the hub bolt 13 so that the brake rotor and wheels of the brake device (both not shown). )) Are stacked and attached.

この車輪用軸受装置Ｄにおいても、車輪用軸受装置Ｃと同様に外輪１に挿入したボール・保持器アッセンブリが軸受組立工程で外輪１から脱落しないように、外輪１の各列の軌道面４に隣接して、軌道面４の溝底径よりも内径側に突出したカウンタボア部９が設けられる。外輪１のカウンタボア部９の内径面が研削加工面とされることは図１の実施形態の場合と同じである。   Also in the wheel bearing device D, the ball and cage assembly inserted into the outer ring 1 as in the wheel bearing device C is provided on the raceway surface 4 of each row of the outer ring 1 so that it does not fall off from the outer ring 1 in the bearing assembly process. Adjacent to the groove bottom diameter of the raceway surface 4 is provided a counter bore portion 9 that protrudes to the inner diameter side. The inner diameter surface of the counter bore portion 9 of the outer ring 1 is the ground surface as in the embodiment of FIG.

この発明の第１の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning 1st Embodiment of this invention. 同車輪用軸受装置における外輪の一端部の拡大断面図である。It is an expanded sectional view of the one end part of the outer ring in the bearing device for the wheels. 同車輪用軸受装置の組立工程における外輪へのボール・保持器アッセンブリ挿入説明図である。It is explanatory drawing of ball | bowl and cage assembly insertion to the outer ring | wheel in the assembly process of the bearing apparatus for wheels. 図３の部分拡大断面図である。FIG. 4 is a partially enlarged sectional view of FIG. 3. カウンタボア部内径面の研削加工方法の説明図である。It is explanatory drawing of the grinding method of the counter bore part inner surface. この発明の他の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning other embodiment of this invention. この発明のさらに他の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning other embodiment of this invention. この発明のさらに他の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning other embodiment of this invention. 従来例の断面図である。It is sectional drawing of a prior art example. 同従来例の組立工程における外輪へのボール・保持器アッセンブリ挿入説明図である。It is explanatory drawing of ball | bowl and cage assembly insertion to the outer ring | wheel in the assembly process of the prior art example.

符号の説明Explanation of symbols

１…外輪 １ａ…シール取付用面
４…外輪軌道面
９…カウンタボア部
９ａ…カウンタボア部の内径面
２０…砥石 DESCRIPTION OF SYMBOLS 1 ... Outer ring 1a ... Seal mounting surface 4 ... Outer ring raceway surface 9: Counter bore portion 9a ... Inner diameter surface 20 of counter bore portion ... Grinding wheel

Claims (4)

複列外向きアンギュラ玉軸受型とされ、外輪の軌道面に隣接して、内径面が外輪軌道面の溝底径よりも内径側に突出したカウンタボア部を有する車輪用軸受装置において、前記カウンタボア部の内径面を研削加工面としたことを特徴とする車輪用軸受装置。   In the wheel bearing device for a wheel having a double-row outward angular contact ball bearing type and having a counter bore portion that is adjacent to the raceway surface of the outer ring and whose inner diameter surface projects to the inner diameter side of the groove bottom diameter of the outer ring raceway surface, A bearing device for a wheel, wherein an inner diameter surface of a bore portion is a ground surface. 請求項１において、前記外輪は、内径面における前記カウンタボア部よりも端部側に、前記カウンタボア部の内径よりも大径のシール取付用面を有するものである車輪用軸受装置。   2. The wheel bearing device according to claim 1, wherein the outer ring has a seal mounting surface having a diameter larger than the inner diameter of the counter bore portion on the end side of the counter bore portion on the inner diameter surface. 請求項２において、外輪の前記カウンタボア部の内径面が、軌道面、およびシール取付用面と同時研削されたものである車輪用軸受装置。   3. The wheel bearing device according to claim 2, wherein an inner diameter surface of the counter bore portion of the outer ring is ground simultaneously with the raceway surface and the seal mounting surface. 複列外向きアンギュラ玉軸受型の車輪用軸受装置において、外輪の軌道面に隣接して、内径面が外輪軌道面の溝底径よりも内径側に突出したカウンタボア部を有し、このカウンタボア部よりも端部側に前記カウンタボア部の内径よりも大径のシール取付用面を有し、前記カウンタボア部の内径面、軌道面、およびシール取付用面が研削加工面とされた車輪用軸受装置の製造方法であって、これらカウンタボア部の内径面、軌道面、およびシール取付用面を、同じ砥石の各部分で同時研削することを特徴とする車輪用軸受装置の製造方法。   In the double-row outward angular ball bearing type wheel bearing device, a counter bore portion is provided adjacent to the raceway surface of the outer ring, the inner diameter surface of which protrudes closer to the inner diameter side than the groove bottom diameter of the outer ring raceway surface. The seal mounting surface has a diameter larger than the inner diameter of the counter bore portion on the end side of the bore portion, and the inner diameter surface, the raceway surface, and the seal mounting surface of the counter bore portion are ground surfaces. A method for manufacturing a wheel bearing device, characterized in that the inner diameter surface, the raceway surface, and the seal mounting surface of the counterbore portion are simultaneously ground by each portion of the same grindstone. .
JP2005227978A 2005-08-05 2005-08-05 Wheel bearing device Active JP4627017B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102913557A (en) * 2012-10-25 2013-02-06 无锡市三立轴承有限公司 Method for pairing bearing free of grinding
CN104179805A (en) * 2014-07-22 2014-12-03 德清德曼汽车零部件有限公司 Outer ring of wheel hub unit
CN104314989A (en) * 2014-10-22 2015-01-28 德清德曼汽车零部件有限公司 Semi-finished bearing outer ring product

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105234750A (en) * 2015-11-13 2016-01-13 中航工业哈尔滨轴承有限公司 Grinding method for bearings with lock points

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JPH08156507A (en) * 1994-12-08 1996-06-18 T R W S S J Kk Spindle and its manufacture
JP2001193745A (en) * 2000-01-11 2001-07-17 Ntn Corp Axle bearing
JP2001289254A (en) * 2000-02-01 2001-10-19 Ntn Corp Bearing for axle
JP2004092830A (en) * 2002-09-02 2004-03-25 Nsk Ltd Manufacturing method for bearing unit for wheel

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Publication number Priority date Publication date Assignee Title
JPS61184216A (en) * 1985-01-31 1986-08-16 シエフラー・ヴエルツラーガー・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Angular ball bearing and assembly method thereof
JPH08156507A (en) * 1994-12-08 1996-06-18 T R W S S J Kk Spindle and its manufacture
JP2001193745A (en) * 2000-01-11 2001-07-17 Ntn Corp Axle bearing
JP2001289254A (en) * 2000-02-01 2001-10-19 Ntn Corp Bearing for axle
JP2004092830A (en) * 2002-09-02 2004-03-25 Nsk Ltd Manufacturing method for bearing unit for wheel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102913557A (en) * 2012-10-25 2013-02-06 无锡市三立轴承有限公司 Method for pairing bearing free of grinding
CN104179805A (en) * 2014-07-22 2014-12-03 德清德曼汽车零部件有限公司 Outer ring of wheel hub unit
CN104314989A (en) * 2014-10-22 2015-01-28 德清德曼汽车零部件有限公司 Semi-finished bearing outer ring product

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