JP2006143069A - Bearing device for axle - Google Patents

Bearing device for axle Download PDF

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Publication number
JP2006143069A
JP2006143069A JP2004337903A JP2004337903A JP2006143069A JP 2006143069 A JP2006143069 A JP 2006143069A JP 2004337903 A JP2004337903 A JP 2004337903A JP 2004337903 A JP2004337903 A JP 2004337903A JP 2006143069 A JP2006143069 A JP 2006143069A
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Prior art keywords
bearing device
holes
working
hole
wheel
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JP2004337903A
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Japanese (ja)
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Tomoyuki Aida
友之 合田
Takaaki Onizuka
高晃 鬼塚
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JTEKT Corp
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JTEKT Corp
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Priority to JP2004337903A priority Critical patent/JP2006143069A/en
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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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for an axle, securing the strength of a flange part without any increase in weight. <P>SOLUTION: Projections 21a, 21b are formed on the inner peripheral side surface of a recessed part 19a of a faucet part 19 to serve as a rotary detent for an inner shaft 12 in assembling the bearing device 10 for an axle. The projections 21a, 21b are formed in the vicinity of narrow space parts 18f, 18g where the space between through holes 18c, 18d for work and the faucet part 19 is made narrowest. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、自動車などの車輪を支持する車軸用軸受装置に関する。   The present invention relates to an axle bearing device that supports wheels of an automobile or the like.

従来、自動車などの車輪を支持するために車軸用軸受装置が用いられている。図４は、このような従来の車軸用軸受装置の一例を示す軸方向断面図であり、図５は、図４中矢印Ｂの方向からの車軸用軸受装置の外観図である。なお図４は、図４中、Ｙ−Ｙ線に沿う断面を示している。
この車軸用軸受装置６０は、複列のアンギュラ玉軸受を構成しており、外輪６１と、内軸６２と、内輪６３と、複数の転動体としての玉６４とを備えている。
外輪６１の外周面には、車体に取り付けるための取り付け部６１ｃが形成されている。
また内軸６２は、回転輪であると同時に図示しない車輪が取り付けられる車軸を構成しており、その一端部には円板状に形成された車輪取付用のフランジ部６５が設けられている。このフランジ部６５は、前記車輪が図示しないディスクロータを挟んで固定されるフランジ面６５ａを有しており、このフランジ面６５ａの中央部には、その内方に凹部６６ａを有する車輪取り付け用のインロー部６６がフランジ面６５ａから突出して形成されている。また、このフランジ部６５にはボルト取り付け用貫通孔６５ｂが同一の円周に沿って５ヶ所、等間隔に形成されており、このボルト取り付け用貫通孔６５ｂには車輪を固定するためのハブボルト６７がそれぞれ固定されている。 Conventionally, an axle bearing device is used to support a wheel of an automobile or the like. FIG. 4 is an axial sectional view showing an example of such a conventional axle bearing device, and FIG. 5 is an external view of the axle bearing device from the direction of arrow B in FIG. FIG. 4 shows a cross section taken along line YY in FIG.
The axle bearing device 60 forms a double row angular ball bearing, and includes an outer ring 61, an inner shaft 62, an inner ring 63, and balls 64 as a plurality of rolling elements.
On the outer peripheral surface of the outer ring 61, an attachment portion 61c for attachment to the vehicle body is formed.
The inner shaft 62 is a rotating wheel and at the same time constitutes an axle to which a wheel (not shown) is mounted. A wheel mounting flange 65 formed in a disk shape is provided at one end of the inner shaft 62. The flange portion 65 has a flange surface 65a on which the wheel is fixed with a disc rotor (not shown) interposed therebetween, and a wheel mounting portion having a recess 66a on the inside of the flange surface 65a. An inlay portion 66 is formed to protrude from the flange surface 65a. The flange portion 65 is formed with five bolt mounting through holes 65b at equal intervals along the same circumference. The bolt mounting through holes 65b have hub bolts 67 for fixing the wheels. Are fixed respectively.

また、隣接する前記ボルト取り付け用貫通孔６５ｂの間の領域の内の２ヶ所に、車軸用軸受装置６０を取り付け部６１ｃを介して前記車両に取り付けるための取り付け工具等が挿通される作業用貫通孔６５ｃが設けられている。さらにこの作業用貫通孔６５ｃによる回転バランスの不均衡を調整するために作業用貫通孔６５ｃよりも小径のバランス用貫通孔６５ｄが２ヶ所設けられている。
また、インロー部６６の凹部６６ａの内周側面には、車軸用軸受装置６０を組み立てる際に内軸６２の回り止めとなる突起６８が２ヶ所、インロー部６６の直径方向線上に対向するように形成されている。
このような車軸用軸受装置６０において、インロー部６６の凹部６６ａの軸方向断面形状を適正なものにしてフランジ部６５の根元部分の強度を確保しつつ回転輪である内軸６２の軽量化を図る試みがなされている（例えば特許文献１参照）。 In addition, a work penetration through which an attachment tool or the like for attaching the axle bearing device 60 to the vehicle through the attachment portion 61c is inserted into two places in the region between the adjacent bolt attachment through holes 65b. A hole 65c is provided. Further, two balance through-holes 65d having a smaller diameter than the work through-hole 65c are provided in order to adjust the rotational balance imbalance caused by the work through-hole 65c.
In addition, on the inner peripheral side surface of the recess 66 a of the inlay portion 66, two protrusions 68 that prevent rotation of the inner shaft 62 when assembling the axle bearing device 60 are opposed to the diameter direction line of the inlay portion 66. Is formed.
In such an axle bearing device 60, the inner shaft 62, which is a rotating wheel, can be reduced in weight while ensuring the strength of the root portion of the flange portion 65 by making the axial sectional shape of the recess 66a of the inlay portion 66 appropriate. Attempts have been made (see, for example, Patent Document 1).

特開２００１−４７８０５号公報（第３頁）Japanese Patent Laid-Open No. 2001-47805 (page 3)

しかしながら、上記従来の車軸用軸受装置６０において、比較的大径の作業用貫通孔６５ｃがフランジ部６５に配置されているので、凹部６６ａの軸方向断面形状によってはフランジ部６５の根元付近の肉厚が部分的に薄くなり、肉厚が薄い部分に応力が集中するなどして、必要な強度を確保できない場合があった。
他方、このような強度不足を補うために凹部６６ａ全体の肉厚を増やして必要な強度を確保することが考えられるが、この場合、内軸６２の重量が増加してしまい、車軸用軸受装置６０が取り付けられる車両の走行性能等に悪影響を及ぼす可能性がある。 However, in the conventional axle bearing device 60, since the relatively large-diameter working through-hole 65c is disposed in the flange portion 65, depending on the axial cross-sectional shape of the recess 66a, the meat near the root of the flange portion 65 can be obtained. In some cases, the required strength could not be ensured, for example, because the thickness was partially reduced and stress was concentrated on the thin wall.
On the other hand, in order to make up for such a lack of strength, it is conceivable to increase the thickness of the entire recess 66a to ensure the required strength. In this case, however, the weight of the inner shaft 62 increases, and the axle bearing device There is a possibility of adversely affecting the running performance of the vehicle to which 60 is attached.

本発明はこのような事情に鑑みなされたものであり、その重量を増加させることなく、フランジ部の強度を確保することができる車軸用軸受装置の提供をその目的とする。   The present invention has been made in view of such circumstances, and an object thereof is to provide an axle bearing device capable of ensuring the strength of the flange portion without increasing the weight thereof.

上記目的を達成するために本発明は、車輪を固定するためのフランジ部を有する回転輪と、車両側に固定される固定輪と、前記回転輪と固定輪との間に転動自在に配置された転動体とを備えた車軸用軸受装置であって、前記フランジ部は、円筒状に形成されるとともに前記フランジ部の前記車輪が固定されるフランジ面から軸方向に突設されているインロー部をその中央部に備え、前記車輪を固定するためのボルトが取り付けられる複数のボルト取り付け用貫通孔が前記インロー部を中心とする円周に沿って等間隔に形成され、隣接する前記ボルト取り付け用貫通孔の間の領域の内の少なくとも一ヶ所に当該車軸用軸受装置を前記車両に取り付けるための取り付け工具が挿通される前記ボルト取り付け用貫通孔よりも大径の作業用貫通孔が形成され、前記インロー部の端面には、軸方向内方に窪んだ凹部が形成され、当該車軸用軸受装置を組み立てる際に前記回転輪の回り止めとなる突起が、前記凹部の内周側面における、前記フランジ面から正面視して前記作業用貫通孔と前記インロー部との間隔が最も狭くなっている狭間隔部の近傍に形成されていることを特徴としている。   In order to achieve the above object, the present invention provides a rotating wheel having a flange portion for fixing a wheel, a fixed wheel fixed to a vehicle side, and a rollable arrangement between the rotating wheel and the fixed wheel. The flange portion is formed in a cylindrical shape and protrudes in an axial direction from a flange surface to which the wheel of the flange portion is fixed. A plurality of bolt mounting through holes to which bolts for fixing the wheel are mounted are formed at equal intervals along the circumference centering on the spigot portion, and adjacent bolt mounting A working through hole having a diameter larger than that of the bolt mounting through hole into which a mounting tool for mounting the axle bearing device to the vehicle is inserted is formed in at least one of the regions between the through through holes. A recess recessed inward in the axial direction is formed on the end surface of the inlay portion, and a protrusion that serves as a detent for the rotating wheel when the axle bearing device is assembled is formed on the inner peripheral side surface of the recess. It is characterized in that it is formed in the vicinity of a narrow gap where the gap between the working through hole and the spigot is the narrowest when viewed from the front of the flange surface.

上記のように構成された車軸用軸受装置によれば、前記凹部内周側面の前記突起を、前記作業用貫通孔が配置されたことによって前記フランジ部の根元付近が比較的薄肉となる前記狭間隔部の近傍に形成したので、前記狭間隔部の肉厚を前記突起によって補間することができる。従って、前記フランジ部の根元付近が部分的に薄肉となるのを防止できる。   According to the axle bearing device configured as described above, the protrusion on the inner peripheral side surface of the recess is arranged on the narrow side where the base portion of the flange portion is relatively thin due to the placement of the working through hole. Since it is formed in the vicinity of the interval portion, the thickness of the narrow interval portion can be interpolated by the protrusion. Accordingly, it is possible to prevent the vicinity of the base of the flange portion from becoming partially thin.

上記車軸用軸受装置において、前記作業用貫通孔は、少なくとも２ヶ所形成され、その内の一の前記作業用貫通孔は、他の作業用貫通孔に対して前記インロー部の中央を中心とする点対称の位置からずれて配置され、前記突起は、互いに前記インロー部の中央を中心とする点対称の位置となるように２ヶ所形成され、前記突起の内の一方は、前記一の作業用貫通孔による前記狭間隔部を通過する前記インロー部の直径方向線上に位置するように周方向に延ばされて形成され、前記突起の内の他方は、前記他の作業用貫通孔の内の一の作業用貫通孔による前記狭間隔部を通過する前記インロー部の直径方向線上に位置するように周方向に延ばされて形成されていてもよい。
この場合、前記狭間隔部を形成する前記作業用貫通孔が互いに前記インロー部の中央を中心とする点対称の位置からずれて配置されたとしても、互いに前記インロー部の中央を中心とする点対称の位置に２ヶ所形成された前記突起を、それぞれその近傍に確実に配置することができ、前記狭間隔部が薄肉となるのを防止できる。 In the above-described axle bearing device, at least two of the working through holes are formed, and one of the working through holes is centered on the center of the inlay portion with respect to the other working through holes. The protrusions are arranged so as to deviate from the point-symmetrical positions, and the protrusions are formed at two positions so as to be point-symmetrical with respect to each other with respect to the center of the spigot portion, and one of the protrusions is for the one work The through hole is formed to extend in the circumferential direction so as to be positioned on the diameter direction line of the inlay portion passing through the narrow space portion, and the other of the protrusions is the other of the other work through holes. It may be formed to extend in the circumferential direction so as to be positioned on the diameter direction line of the inlay portion passing through the narrow gap portion by one working through hole.
In this case, even if the working through-holes forming the narrow gap portions are arranged so as to deviate from a point-symmetrical position with respect to the center of the inlay portion, the points having the center of the inlay portion as a center. The protrusions formed at two symmetrical positions can be reliably disposed in the vicinity of each of the protrusions, and the narrow gap portion can be prevented from becoming thin.

以上のように、本発明に係る車軸用軸受装置によれば、当該車軸用軸受装置を組み立てる際に回り止めとなるインロー部内周側面の突起によって前記フランジ部の根元付近が部分的に薄肉となるのを防止したので、その重量を増加させることなくフランジ部の強度を確保することができる。   As described above, according to the axle bearing device of the present invention, the vicinity of the base of the flange portion is partially thinned by the protrusion on the inner peripheral side surface of the spigot portion which is a detent when the axle bearing device is assembled. Therefore, the strength of the flange portion can be ensured without increasing its weight.

次に、本発明の好ましい実施形態について添付図面を参照しながら説明する。図１は本発明の第一の実施形態である車軸用軸受装置の要部構成を示す軸方向断面図であり、図２は、図１中矢印Ａの方向からの当該車軸用軸受装置の外観図である。なお図１は、図２中、Ｘ−Ｘ線に沿う断面を示している。この車軸用軸受装置１０は、自動車などの車両の車輪を懸架装置に対して回転自在に支持する装置として用いられるものである。   Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an axial cross-sectional view showing the configuration of the main part of an axle bearing device according to a first embodiment of the present invention, and FIG. 2 is an external view of the axle bearing device from the direction of arrow A in FIG. FIG. 1 shows a cross section taken along line XX in FIG. The axle bearing device 10 is used as a device that rotatably supports a wheel of a vehicle such as an automobile with respect to a suspension device.

車軸用軸受装置１０は、複列のアンギュラ玉軸受を構成しており、外輪１１と、内軸１２と、外輪１１と内軸１２間に配置された複数の玉からなる転動体１３と、これらの転動体１３をそれぞれ保持する保持器１４，１４と、外輪１１と内軸１２との隙間に設けられて内部を密封するシール１５，１５と、を備えている。
内軸１２は、回転輪であると同時に図示しない車輪が取り付けられる車軸を構成しており、内軸本体１６と、内輪１７とを組合わせて構成されている。内軸本体１６は、第一の内輪軌道１２ａが外周面に形成されるとともにフランジ部１８を一端部に備えている。そして他端部には内輪軌道１２ａよりも小径の段部１６ａが形成されており、円環状に成形された内輪１７が圧入状態で挿入されている。
この内輪１７の外周面には、第二の内輪軌道１２ｂが形成されている。また、内軸１２の他端面にはねじ部１２ｃが形成されており、このねじ部１２ｃは、内輪１７が挿入された状態で内輪１７の大径側端面１７ａから突出している。このねじ部１２ｃにはナット１２ｄが螺合されており、内輪１７は、このナット１９と段部１６ａの段差面１６ａ１との間で挟持されて内軸本体１６に固定されている。 The axle bearing device 10 constitutes a double-row angular ball bearing, and includes an outer ring 11, an inner shaft 12, a rolling element 13 composed of a plurality of balls disposed between the outer ring 11 and the inner shaft 12, and these Retainers 14 and 14 that respectively hold the rolling elements 13 and seals 15 and 15 that are provided in a gap between the outer ring 11 and the inner shaft 12 to seal the inside.
The inner shaft 12 is a rotating wheel and constitutes an axle to which a wheel (not shown) is attached. The inner shaft 12 is configured by combining an inner shaft main body 16 and an inner ring 17. The inner shaft main body 16 includes a first inner ring raceway 12a formed on the outer peripheral surface and a flange portion 18 at one end. A step portion 16a having a smaller diameter than the inner ring raceway 12a is formed at the other end portion, and an inner ring 17 formed in an annular shape is inserted in a press-fitted state.
A second inner ring raceway 12 b is formed on the outer peripheral surface of the inner ring 17. Further, a screw portion 12c is formed on the other end surface of the inner shaft 12, and this screw portion 12c protrudes from the large-diameter side end surface 17a of the inner ring 17 in a state where the inner ring 17 is inserted. A nut 12d is screwed to the screw portion 12c, and the inner ring 17 is fixed between the nut 19 and the step surface 16a1 of the step portion 16a and fixed to the inner shaft main body 16.

外輪１１は、車体側に固定される固定輪であり、その内周面に第一および第二の内輪軌道１２ａ，１２ｂに対向する第一および第二の外輪軌道１１ａ，１１ｂが形成され、外周面には車体に取り付けるための取り付け部１１ｃが形成されている。   The outer ring 11 is a fixed ring that is fixed to the vehicle body side, and first and second outer ring raceways 11a and 11b that face the first and second inner ring raceways 12a and 12b are formed on the inner circumferential surface thereof, An attachment portion 11c for attachment to the vehicle body is formed on the surface.

フランジ部１８は、図２のように円板状に形成されており、そのフランジ面１８ａには、図示しないディスクロータを挟みつつ、前記車輪が固定される。また、このフランジ部１８は、円筒状に形成されるとともにフランジ面１８ａから軸方向に突設されているインロー部１９をその中央部に備えるとともに、軸方向にフランジ部１８を貫通しているボルト取り付け用貫通孔１８ｂ、第一および第二の作業用貫通孔１８ｃ，１８ｄ、およびバランス用貫通孔１８ｅが所定の位置に形成されている。
ボルト取り付け用貫通孔１８ｂは、インロー部１９を中心とする円周線上に沿って等間隔に５ヶ所形成されている。また、ボルト取り付け用貫通孔１８ｂのそれぞれには、前記車輪を固定するためのハブボルト２０が、フランジ面１８ａから突出して固定されている。 The flange portion 18 is formed in a disk shape as shown in FIG. 2, and the wheel is fixed to the flange surface 18 a while sandwiching a disk rotor (not shown). The flange portion 18 is formed in a cylindrical shape and includes an inlay portion 19 projecting in the axial direction from the flange surface 18a at the center thereof, and a bolt penetrating the flange portion 18 in the axial direction. The mounting through hole 18b, the first and second working through holes 18c and 18d, and the balancing through hole 18e are formed at predetermined positions.
The bolt mounting through holes 18b are formed at five equal intervals along a circumferential line centering on the spigot portion 19. A hub bolt 20 for fixing the wheel is fixed to each of the bolt mounting through holes 18b so as to protrude from the flange surface 18a.

第一の作業用貫通孔１８ｃは、フランジ面１８ａにおいて隣接するボルト取り付け用貫通孔１８ｂの間の領域に配置され、第二の作業用貫通孔１８ｄは、第一の作業用貫通孔１８ｃが配置された領域から一つ分の領域を空けて周方向に並ぶ領域に配置されている。これら両作業用貫通孔１８ｃ，１８ｄは、車軸用軸受装置１０を車両に取り付けるべく、外輪１１の取り付け部１１ｃと車両の懸架装置等とを固定する際に、取り付け工具等を挿通するための貫通孔であり、両者は実質的にほぼ同一形状に形成されている。この両作業用貫通孔１８ｃ，１８ｄの径寸法は、ボルト取り付け用貫通孔１８ｂより大径に形成されており、取り付け工具を挿通して作業するのに必要な大きさに設定されている。また、ボルト取り付け用貫通孔１８ｂが５ヶ所に等配されているため、この第一の作業用貫通孔１８ｃは、第二の作業用貫通孔１８ｄに対してインロー部１９の中央を中心とする点対称の位置からずれて配置されている。   The first work through hole 18c is disposed in the region between the adjacent bolt mounting through holes 18b on the flange surface 18a, and the first work through hole 18c is disposed in the second work through hole 18d. It is arranged in a region lined up in the circumferential direction by leaving one region away from the formed region. These two through-holes 18c and 18d are through-holes for inserting an attachment tool or the like when fixing the mounting portion 11c of the outer ring 11 and the suspension device of the vehicle in order to attach the axle bearing device 10 to the vehicle. It is a hole, and both are formed in substantially the same shape. The diameters of both the working through holes 18c and 18d are formed larger than the bolt mounting through holes 18b, and are set to a size necessary for working with the attachment tool. Further, since the bolt mounting through holes 18b are equally distributed at five locations, the first work through hole 18c is centered on the center of the inlay portion 19 with respect to the second work through hole 18d. Arranged from a point-symmetrical position.

バランス用貫通孔１８ｅは、隣接するボルト取り付け用貫通孔１８ｂの間の領域の内、作業用貫通孔１８ｃが形成されていない領域の内の２ヶ所に同一の円周線上に沿って形成されている。これらのバランス用貫通孔１８ｅは、ボルト取り付け用貫通孔１８ｂよりも小径とされており、作業用貫通孔１８ｃによるフランジ部１８の回転バランスの不均衡を調整するようにされている。   The balancing through-holes 18e are formed along the same circumference at two places in the region between the adjacent bolt-mounting through-holes 18b and the region where the working through-hole 18c is not formed. Yes. These balance through-holes 18e are smaller in diameter than the bolt-attaching through-holes 18b, and are adapted to adjust the imbalance in the rotational balance of the flange portion 18 due to the work through-holes 18c.

インロー部１９は、その端面に軸方向内方に窪んだ凹部１９ａが形成されている。このインロー部１９は、前記車輪中央部に内嵌し、内軸１２と前記車輪とを同心に位置決めする。インロー部１９の凹部１９ａの内周側面には、凹部１９ａ開口部からその底部に渡って突出した第一および第二の突起２１ａ，２１ｂが、互いにインロー部１９の中央を中心とする点対称の位置に形成されている。この両突起２１ａ，２１ｂは、車軸用軸受装置１０を組み立てる際に凹部１９ａに治具等を差し込むことで内軸１２の回り止めとなるものであり、両者は実質的にほぼ同一形状に形成されている。
また、凹部１９ａの底部には、内軸本体１６を旋削加工等する際の基準となるセンター穴１９ｂが形成されている。 The inlay part 19 has a recess 19a that is recessed inward in the axial direction on the end face thereof. The inlay part 19 is fitted into the wheel center part and positions the inner shaft 12 and the wheel concentrically. On the inner peripheral side surface of the recessed portion 19a of the inlay portion 19, first and second protrusions 21a and 21b protruding from the opening portion of the recessed portion 19a to the bottom thereof are point-symmetric with respect to each other about the center of the inlay portion 19. Formed in position. Both the protrusions 21a and 21b serve to prevent the inner shaft 12 from rotating by inserting a jig or the like into the recess 19a when assembling the axle bearing device 10, and both are formed in substantially the same shape. ing.
A center hole 19b is formed at the bottom of the recess 19a, which serves as a reference when the inner shaft main body 16 is turned.

第一の突起２１ａは、フランジ面１８ａから正面視して第一の作業用貫通孔１８ｃとインロー部１９との径方向の間隔が最も狭くなっている狭間隔部１８ｆを通過するインロー部１９の直径方向線Ｐ１の線上に位置するように、凹部１９ａの内周側面の周方向に沿って延ばされて形成されている。
同様に、第二の突起２１ｂは、フランジ面１８ａから正面視して第二の作業用貫通孔１８ｄとインロー部１９との径方向の間隔が最も狭くなっている狭間隔部１８ｇを通過するインロー部１９の直径方向線Ｐ２の線上に突起２１が位置するように、凹部１９ａの内周側面の周方向に沿って延ばされて形成されている。このようにすることで、両作業用貫通孔１８ｃ，１８ｄが、互いにインロー部１９の中央を中心とする点対称の位置からずれて配置されていたとしても、両突起２１ａ，２１ｂを、それぞれ狭間隔部１８ｆ，１８ｇの近傍に確実に配置することができる。 The first protrusion 21a is a front portion of the spigot portion 19 that passes through the narrow spacing portion 18f in which the radial spacing between the first working through hole 18c and the spigot portion 19 is the smallest when viewed from the front of the flange surface 18a. It is extended and formed along the circumferential direction of the inner peripheral side surface of the recessed part 19a so that it may be located on the line of the diameter direction line P1.
Similarly, the second projection 21b passes through the narrow space 18g through which the radial space between the second work through hole 18d and the hollow 19 is the narrowest when viewed from the front of the flange surface 18a. The protrusion 19 is formed to extend along the circumferential direction of the inner peripheral side surface of the recess 19a so that the protrusion 21 is positioned on the diameter direction line P2 of the portion 19. In this way, even if both the working through holes 18c and 18d are arranged so as to be shifted from a point-symmetrical position around the center of the spigot portion 19, both the protrusions 21a and 21b are narrowed. It can arrange | position reliably in the vicinity of the space | interval parts 18f and 18g.

このように構成された本実施形態に係る車軸用軸受装置によれば、凹部１９ａの内周側面に形成され、車軸用軸受装置１０を組み立てる際の回り止めとして備えられている両突起２１ａ，２１ｂを、大径の作業用貫通孔１８ｃ，１８ｄが配置されたことによってフランジ部１８の根元付近が比較的薄肉となる狭間隔部１８ｆ，１８ｇの近傍に形成したので、狭間隔部１８ｆ，１８ｇの肉厚をそれぞれ両突起２１ａ，２１ｂによって補間することができる。従って、車軸用軸受装置１０の重量を大きく増加させることなく、フランジ部１８の狭間隔部１８ｆ，１８ｇが部分的に薄肉となるのを防止し、その強度を確保することができる。   According to the axle bearing device according to the present embodiment configured as described above, both protrusions 21a and 21b that are formed on the inner peripheral side surface of the recess 19a and are provided as detents when the axle bearing device 10 is assembled. Are formed in the vicinity of the narrow spacing portions 18f and 18g where the base portion of the flange portion 18 is relatively thin due to the arrangement of the large-diameter working through holes 18c and 18d. The wall thickness can be interpolated by both protrusions 21a and 21b, respectively. Accordingly, the narrow spacing portions 18f and 18g of the flange portion 18 can be prevented from being partially thinned and the strength thereof can be ensured without greatly increasing the weight of the axle bearing device 10.

なお、本発明は上記実施形態のみに限定されるものではなく、種々の変形が考えられる。図３は、本発明の第二の実施形態に係る車軸用軸受装置のフランジ面を示す外観図である。本実施形態と第一の実施形態との主な相違点は、フランジ部１８に配置されたボルト取り付け用貫通孔１８ｂが同一の円周に沿って等間隔に４ヶ所形成されている点である。その他の点については、第一の実施形態と同様なので説明を省略する。   In addition, this invention is not limited only to the said embodiment, A various deformation | transformation can be considered. FIG. 3 is an external view showing a flange surface of the axle bearing device according to the second embodiment of the present invention. The main difference between this embodiment and the first embodiment is that four bolt mounting through holes 18b arranged in the flange portion 18 are formed at equal intervals along the same circumference. . Since other points are the same as those in the first embodiment, description thereof is omitted.

この場合、両作業用貫通孔１８ｃ，１８ｄは、互いにインロー部１９の中央を中心とする点対称の位置となるように配置されているとともに、両作業用貫通孔１８ｃ，１８ｄが配置されている位相をボルト取り付け用貫通孔１８ｂが配置されている位相に対して４５度ずらして配置されている。
また、バランス用貫通孔１８ｅは、隣接するボルト取り付け用貫通孔１８ｂの間の領域の内、作業用貫通孔１８ｃ，１８ｄが設けられていない領域２ヶ所にそれぞれ設けられている。また、これらバランス用貫通孔１８ｅも互いにインロー部１９の中央を中心とする点対称の位置となるように配置されるとともに、このバランス用貫通孔１８ｅが配置されている位相を両作業用貫通孔１８ｃ，１８ｄが配置されている位相に対して９０度ずらして配置されている。 In this case, the two working through holes 18c and 18d are arranged so as to be point-symmetric with respect to each other with the center of the spigot portion 19 as the center, and the two working through holes 18c and 18d are arranged. The phase is shifted by 45 degrees with respect to the phase where the bolt mounting through hole 18b is disposed.
Further, the balance through holes 18e are respectively provided in two regions where the work through holes 18c and 18d are not provided in the region between the adjacent bolt mounting through holes 18b. The balance through-holes 18e are also arranged so as to be point-symmetric with respect to the center of the spigot portion 19, and the phase where the balance through-holes 18e are arranged is defined as both working through-holes. They are arranged 90 degrees away from the phase where 18c and 18d are arranged.

このように構成された本実施形態の車軸用軸受装置の場合、フランジ部１８の両作業用貫通孔１８ｃ，１８ｄと両突起２１ａ，２１ｂとを同一の直径方向線上に配置することができるので、突起２１の円周方向の幅をより小さくしてもフランジ部１８の狭間隔部１８ｆが薄肉となる部分を補間することができ、十分にその強度を確保することができる。   In the case of the axle bearing device of the present embodiment configured in this way, both the working through holes 18c, 18d of the flange portion 18 and the two protrusions 21a, 21b can be arranged on the same diameter direction line. Even if the circumferential width of the protrusion 21 is made smaller, the portion where the narrow space portion 18f of the flange portion 18 is thin can be interpolated, and the strength thereof can be sufficiently secured.

なお、上記各実施形態では、作業用貫通孔を２ヶ所形成した場合を示したが、例えば、作業用貫通孔が１ヶ所だけもしくは３ヶ所以上形成された場合にも本発明は適用することができる。
また、上記各実施形態では、内軸１２が回転輪となる構成を有する車軸用軸受装置について示したが、外輪が回転輪となる構成を有する車軸用軸受装置にも適用することができる。また、上記各実施形態では、車軸用軸受装置１０は複列のアンギュラ玉軸受を用いたが、例えば、複列の円錐ころ軸受等を用いた車両用軸受装置にも適用できる。 In each of the above embodiments, the case where two working through holes are formed is shown. However, for example, the present invention can be applied to the case where only one working hole or three or more working through holes are formed. it can.
In each of the above embodiments, the axle bearing device having a configuration in which the inner shaft 12 is a rotating wheel has been described. However, the present invention can also be applied to an axle bearing device having a configuration in which the outer ring is a rotating wheel. In each of the above-described embodiments, the double-row angular contact ball bearing is used as the axle bearing device 10. However, the present invention can also be applied to a vehicle bearing device using a double-row tapered roller bearing or the like.

また、本発明の車軸用軸受装置は、上記実施形態に限定されるものではなく、軸受装置の構成や、フランジ部の形状、構成、突起の形状等は、本発明の趣旨に基づいて適宜変更することができる。   Further, the axle bearing device of the present invention is not limited to the above embodiment, and the configuration of the bearing device, the shape of the flange portion, the configuration, the shape of the protrusion, and the like are appropriately changed based on the gist of the present invention. can do.

本発明の第一の実施形態に係る車軸用軸受装置の要部構成を示す軸方向断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an axial cross-sectional view showing a main configuration of an axle bearing device according to a first embodiment of the present invention. 図１中矢印Ａの方向からの当該車軸用軸受装置の外観図である。It is an external view of the said bearing apparatus for axles from the direction of arrow A in FIG. 本発明の第二の実施形態に係る車軸用軸受装置の外観図である。It is an external view of the axle bearing device which concerns on 2nd embodiment of this invention. 従来の車軸用軸受装置の構成を示す軸方向断面図である。It is an axial sectional view showing the configuration of a conventional axle bearing device. 図４中矢印Ｂの方向からの当該車軸用軸受装置の外観図である。It is an external view of the said bearing apparatus for axles from the direction of arrow B in FIG.

符号の説明Explanation of symbols

１０ 車軸用軸受装置
１１ 外輪
１２ 内軸
１３ 転動体
１８ フランジ部
１８ａ フランジ面
１８ｂ ボルト取り付け用貫通孔
１８ｃ，１８ｄ 第一および第二の作業用貫通孔
１８ｆ，１８ｇ 狭間隔部
１９ インロー部
１９ａ 凹部
２１ａ，２１ｂ 第一および第二の突起 DESCRIPTION OF SYMBOLS 10 Axle bearing device 11 Outer ring 12 Inner shaft 13 Rolling element 18 Flange 18a Flange surface 18b Bolt mounting through hole 18c, 18d First and second working through holes 18f, 18g Narrow spacing 19 Inlay 19a Recess 21a , 21b first and second protrusions

Claims (2)

車輪を固定するためのフランジ部を有する回転輪と、車両側に固定される固定輪と、前記回転輪と固定輪との間に転動自在に配置された転動体とを備えた車軸用軸受装置であって、
前記フランジ部は、円筒状に形成されるとともに前記フランジ部の前記車輪が固定されるフランジ面から軸方向に突設されているインロー部をその中央部に備え、前記車輪を固定するためのボルトが取り付けられる複数のボルト取り付け用貫通孔が前記インロー部を中心とする円周に沿って等間隔に形成され、隣接する前記ボルト取り付け用貫通孔の間の領域の内の少なくとも一ヶ所に当該車軸用軸受装置を前記車両に取り付けるための取り付け工具が挿通される前記ボルト取り付け用貫通孔よりも大径の作業用貫通孔が形成され、
前記インロー部の端面には、軸方向内方に窪んだ凹部が形成され、
当該車軸用軸受装置を組み立てる際に前記回転輪の回り止めとなる突起が、前記凹部の内周側面における、前記フランジ面から正面視して前記作業用貫通孔と前記インロー部との間隔が最も狭くなっている狭間隔部の近傍に形成されていることを特徴とする車軸用軸受装置。 Axle bearing comprising: a rotating wheel having a flange portion for fixing a wheel; a fixed wheel fixed to a vehicle side; and a rolling element arranged to roll between said rotating wheel and the fixed wheel. A device,
The flange portion is formed in a cylindrical shape and includes an inlay portion protruding in the axial direction from a flange surface to which the wheel of the flange portion is fixed, and a bolt for fixing the wheel. A plurality of bolt mounting through holes to which the bolts are attached are formed at equal intervals along a circumference centered on the inlay portion, and the axle is provided in at least one of the regions between the adjacent bolt mounting through holes. A working through hole having a diameter larger than that of the bolt mounting through hole through which a mounting tool for mounting the bearing device to the vehicle is inserted,
The end surface of the inlay portion is formed with a recess recessed inward in the axial direction,
When assembling the axle bearing device, the protrusion that prevents the rotating wheel from rotating is the distance between the working through hole and the spigot portion when viewed from the flange surface on the inner peripheral side surface of the recess. An axle bearing device, characterized in that it is formed in the vicinity of a narrow space portion that is narrow. 前記作業用貫通孔は、少なくとも２ヶ所形成され、その内の一の前記作業用貫通孔は、他の作業用貫通孔に対して前記インロー部の中央を中心とする点対称の位置からずれて配置され、
前記突起は、互いに前記インロー部の中央を中心とする点対称の位置となるように２ヶ所形成され、
前記突起の内の一方は、前記一の作業用貫通孔による前記狭間隔部を通過する前記インロー部の直径方向線上に位置するように周方向に延ばされて形成され、
前記突起の内の他方は、前記他の作業用貫通孔の内の一の作業用貫通孔による前記狭間隔部を通過する前記インロー部の直径方向線上に位置するように周方向に延ばされて形成されている請求項１記載の車軸用軸受装置。 The working through hole is formed in at least two places, and one of the working through holes is shifted from a point-symmetrical position around the center of the inlay portion with respect to the other working through hole. Arranged,
The projections are formed at two locations so as to be point-symmetrical with respect to each other about the center of the inlay portion,
One of the protrusions is formed to extend in the circumferential direction so as to be positioned on a diameter direction line of the inlay portion that passes through the narrow interval portion by the one working through hole,
The other of the protrusions is extended in the circumferential direction so as to be positioned on a diameter direction line of the inlay portion passing through the narrow space portion by one of the other work through holes. The axle bearing device according to claim 1, which is formed as described above.
JP2004337903A 2004-11-22 2004-11-22 Bearing device for axle Pending JP2006143069A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010089522A (en) * 2008-10-03 2010-04-22 Nsk Ltd Method for manufacturing rolling bearing unit for supporting wheel
JP2011230614A (en) * 2010-04-27 2011-11-17 Nsk Ltd Method for manufacturing rolling bearing unit for supporting wheel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010089522A (en) * 2008-10-03 2010-04-22 Nsk Ltd Method for manufacturing rolling bearing unit for supporting wheel
JP2011230614A (en) * 2010-04-27 2011-11-17 Nsk Ltd Method for manufacturing rolling bearing unit for supporting wheel

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