JP6680078B2 - Ring gauge for shell needle roller bearings - Google Patents

Ring gauge for shell needle roller bearings Download PDF

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JP6680078B2
JP6680078B2 JP2016102534A JP2016102534A JP6680078B2 JP 6680078 B2 JP6680078 B2 JP 6680078B2 JP 2016102534 A JP2016102534 A JP 2016102534A JP 2016102534 A JP2016102534 A JP 2016102534A JP 6680078 B2 JP6680078 B2 JP 6680078B2
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needle roller
roller bearing
shell
diameter
measuring
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JP2017211198A (en
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水野　浩一郎
浩一郎 水野
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JTEKT Corp
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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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/40—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes
    • F16D3/41—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes with ball or roller 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
    • F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
    • F16C21/005—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement the external zone of a bearing with rolling members, e.g. needles, being cup-shaped, with or without a separate thrust-bearing disc or ring, e.g. for universal joints
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
    • F16D3/385—Bearing cup; Bearing construction; Bearing seal; Mounting of bearing on the intermediate member

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Description

本発明は、シェル形針状ころ軸受用リングゲージに関する。   The present invention relates to a ring gauge for needle roller bearings of shell type.

自動車等の車両の操舵系に用いられる複数本のシャフトの端部同士や、車両の駆動系に用いられる複数本のシャフトの端部同士は、十字軸継手を介して互いに連結されている（例えば、特許文献１参照）。この十字軸継手は、例えば、図１に示すように、胴体部１６から四方へ十字状に突出する４本の軸部１７を有する十字軸１４と、各軸部１７に取り付けられるシェル形針状ころ軸受１３と、シェル形針状ころ軸受１３の外輪２１が取り付けられるヨーク１１，１２とを備えている。   Ends of a plurality of shafts used in a steering system of a vehicle such as an automobile, or ends of a plurality of shafts used in a drive system of a vehicle are connected to each other via a cross joint (for example, , Patent Document 1). For example, as shown in FIG. 1, this cross joint is a cross-shaped shaft 14 having four shaft portions 17 protruding in a cross shape from the body portion 16 in four directions, and a shell-shaped needle-like member attached to each shaft portion 17. The roller bearing 13 and the yokes 11 and 12 to which the outer ring 21 of the shell-shaped needle roller bearing 13 is attached are provided.

シェル形針状ころ軸受１３の外輪２１は、円筒形状に形成された外輪本体２４と、外輪本体２４の軸方向の一端を塞ぐ閉塞部２５とを備えた有底円筒形状に形成されている。そして、外輪本体２４の外周面がヨーク１１，１２の軸受孔１１ｂ，１２ｂに嵌合されることによって、シェル形針状ころ軸受１３がヨーク１１，１２に装着される。   The outer race 21 of the shell needle roller bearing 13 is formed in a bottomed cylindrical shape including an outer race body 24 formed in a cylindrical shape and a closing portion 25 that closes one end of the outer race body 24 in the axial direction. Then, the shell-shaped needle roller bearing 13 is mounted on the yokes 11 and 12 by fitting the outer peripheral surface of the outer ring body 24 into the bearing holes 11b and 12b of the yokes 11 and 12, respectively.

この種のシェル形針状ころ軸受１３における外輪２１は、薄肉の板材のプレス加工によって形成されるため寸法にばらつきが生じ易い。そのため、シェル形針状ころ軸受１３は、複数の針状ころ２２を組み込んだ状態で外輪２１をリングゲージ１３１（図５参照）と呼ばれる治具に嵌合し、外輪２１の外径を拘束した状態で複数の針状ころ２２に内接する円の直径（内接円径）Ｄ０を測定することによって寸法精度が評価されている。   The outer ring 21 of the shell-shaped needle roller bearing 13 of this type is formed by pressing a thin plate material, so that the dimensions are likely to vary. Therefore, in the shell needle roller bearing 13, the outer ring 21 is fitted to a jig called a ring gauge 131 (see FIG. 5) in a state where a plurality of needle rollers 22 are incorporated to restrain the outer diameter of the outer ring 21. The dimensional accuracy is evaluated by measuring the diameter (inscribed circle diameter) D0 of the circle inscribed in the plurality of needle rollers 22 in this state.

リングゲージ１３１は円環状に形成され、その内径が十字軸継手１０のヨーク１１，１２に形成された軸受孔１１ｂ，１２ｂの内径と略同一となるように形成されている。したがって、リングゲージ１３１の内周面に外輪２１を嵌合させた状態で内接円径Ｄ０を測定することで、実際の装着対象であるヨーク１１，１２に装着した状態を想定した寸法精度の評価を行うことができる。   The ring gauge 131 is formed in an annular shape, and its inner diameter is substantially the same as the inner diameters of the bearing holes 11b and 12b formed in the yokes 11 and 12 of the cross joint 10. Therefore, by measuring the inscribed circle diameter D0 with the outer ring 21 fitted to the inner peripheral surface of the ring gauge 131, it is possible to obtain the dimensional accuracy assuming the state of being mounted on the yokes 11 and 12 that are the actual mounting targets. An evaluation can be done.

特開２０１０−２０４３号公報JP, 2010-2043, A

シェル形針状ころ軸受に用いられるリングゲージは、繰り返しの使用に耐える耐久性が求められるため、剛性や耐摩耗性の高い材料、例えば工具鋼を用いて形成されている。一方、実際にシェル形針状ころ軸受が取り付けられるヨークは、通常、リングゲージよりも剛性が低い。その結果、リングゲージに装着して測定したシェル形針状ころ軸受の内接円径と、実際にヨークに装着した場合のシェル形針状ころ軸受の内接円径との差が大きくなる場合がある。特に、剛性の高いリングゲージによって外輪の外径が拘束された状態で測定されたシェル形針状ころ軸受の内接円径は、剛性の低いヨークに装着したシェル形針状ころ軸受の内接円径よりも小さくなる傾向にある。そのため、内接円径が寸法公差内と評価されたシェル形針状ころ軸受であっても、ヨークに装着したときにシェル形針状ころ軸受と十字軸の軸部との間の隙間が大きくなり、ガタが発生するおそれがある。   The ring gauge used for the shell-type needle roller bearing is required to have durability to withstand repeated use, and thus is formed using a material having high rigidity and wear resistance, for example, tool steel. On the other hand, the yoke to which the shell needle roller bearing is actually mounted usually has lower rigidity than the ring gauge. As a result, the difference between the inscribed circle diameter of the shell needle roller bearing measured by mounting it on the ring gauge and the inscribed circle diameter of the shell needle roller bearing actually mounted on the yoke becomes large. There is. In particular, the inscribed circle diameter of a shell needle roller bearing measured with the outer diameter of the outer ring being constrained by a ring gauge with high rigidity is the inscribed circle diameter of the shell needle roller bearing mounted on a yoke with low rigidity. It tends to be smaller than the circle diameter. Therefore, even with a shell needle roller bearing whose inscribed circle diameter is evaluated to be within the dimensional tolerance, the gap between the shell needle roller bearing and the cross shaft is large when mounted on the yoke. May cause play.

本発明は、このような実情に鑑みてなされたものであり、リングゲージを用いて測定したシェル形針状ころ軸受の内接円径と、実際の装着対象に装着したときのシェル形針状ころ軸受の内接円径との乖離を少なくし、実際の装着対象にシェル形針状ころ軸受を装着したときのガタの発生を防止することができる、シェル形針状ころ軸受用のリングゲージを提供することを目的とする。   The present invention has been made in view of such circumstances, and has an inscribed circle diameter of a shell-shaped needle roller bearing measured using a ring gauge, and a shell-shaped needle roller when mounted on an actual mounting target. A ring gauge for needle roller bearings with shells that reduces deviation from the inscribed circle diameter of the roller bearings and prevents backlash when the shell needle roller bearings are actually mounted. The purpose is to provide.

本発明は、シェル形針状ころ軸受の外輪の外周面を嵌合させるための嵌合面を内周に有する円筒形状の測定部と、
前記測定部に対して軸方向に隣接して設けられ、前記測定部よりも外径及び重量の大きいベース部と、を備え、
前記測定部は、針状ころを組み込んだ前記外輪を前記嵌合面に嵌合させたときの前記測定部の拡径量が、前記外輪を実際の装着対象に嵌合させたときの前記装着対象の拡径量と同一となるような径方向の剛性を有している。 The present invention is a cylindrical measuring part having a fitting surface on the inner periphery for fitting the outer peripheral surface of the outer ring of a shell-shaped needle roller bearing,
A base portion that is provided adjacent to the measuring portion in the axial direction and has a larger outer diameter and weight than the measuring portion,
The measuring unit has a diameter expansion amount of the measuring unit when the outer ring incorporating needle rollers is fitted to the fitting surface, and the mounting when the outer ring is fitted to an actual mounting target. It has a radial rigidity that is the same as the target diameter expansion amount.

この構成によれば、リングゲージの測定部にシェル形針状ころ軸受の外輪を嵌合させた状態で測定した内接円径と、ヨーク等の実際の装着対象にシェル形針状ころ軸受の外輪を嵌合させたときの内接円径との乖離を少なくすることができる。そのため、前記装着対象に嵌合させたシェル形針状ころ軸受に軸を挿入した場合のガタの発生を抑制することができる。なお、上記構成において、測定部と装着対象との拡径量が「同一」というのは、双方の拡径量が完全に同一である場合だけでなく、実質的に同一とみなすことができる場合も含む。例えば、双方の拡径量の差が内接円径の寸法公差内に収まる程度に、双方の「拡径量」が接近している場合等も含む。   According to this configuration, the inscribed circle diameter measured with the outer ring of the shell type needle roller bearing fitted to the measuring portion of the ring gauge and the shell type needle roller bearing of the actual mounting target such as the yoke It is possible to reduce the deviation from the inscribed circle diameter when the outer ring is fitted. Therefore, it is possible to suppress the occurrence of backlash when the shaft is inserted into the shell-shaped needle roller bearing fitted to the mounting target. In the above configuration, the amount of expansion of the measurement unit and the object to be attached is “same” not only when the amounts of expansion of both are completely the same, but when they can be considered to be substantially the same. Also includes. For example, the case in which the “diameter expansion amounts” of both are close to each other so that the difference between the two diameter expansion amounts falls within the dimensional tolerance of the inscribed circle diameter is included.

また、リングゲージは、測定部よりも外径及び重量の大きいベース部を備えているので、例えば、測定部に嵌合されたシェル形針状ころ軸受の内部に、内接円径を測定するためのピンゲージを挿入し、このピンゲージをシェル形針状ころ軸受から抜き取るときの荷重が所定の値である場合に当該ピンゲージの外径を内接円径として測定する手法を採用する場合に、リングゲージのベース部を利用して前記荷重を設定することが可能となる。また、ベース部は、測定部よりも外径が大きく形成されるので、ベース部を把持した状態でリングゲージを取り扱うことができ、リングゲージの操作性を高めることができる。   Further, since the ring gauge includes a base portion having an outer diameter and a weight larger than that of the measuring portion, for example, the inscribed circle diameter is measured inside the shell-shaped needle roller bearing fitted in the measuring portion. When a method is used in which the pin gauge for the pin gauge is inserted and the load when the pin gauge is pulled out from the shell needle roller bearing has a prescribed value, the outer diameter of the pin gauge is measured as the inscribed circle diameter, the ring The load can be set using the base portion of the gauge. Further, since the outer diameter of the base portion is larger than that of the measuring portion, the ring gauge can be handled while the base portion is gripped, and the operability of the ring gauge can be improved.

前記嵌合面は、前記装着対象に対する前記外輪の軸方向の嵌合長さと同一の軸方向の長さを有していることが好ましい。
このような構成によって、実際の装着対象に外輪を嵌合する状態により近い状態でシェル形針状ころ軸受の内接円径を測定することができる。なお、嵌合面の軸方向長さと、装着対象に対する外輪の軸方向の嵌合長さとが「同一」というのは、両者が完全に同一である場合に限らず、実質的に同一とみなすことができる場合も含む。例えば、装着対象に対する外輪の軸方向の嵌合長さが、シェル形針状ころ軸受の周方向で変化するような場合、嵌合面の軸方向長さを前記嵌合長さの平均値に設定することも前記「同一」に含まれる。 It is preferable that the fitting surface has the same axial length as the axial fitting length of the outer ring with respect to the mounting target.
With such a configuration, it is possible to measure the inscribed circle diameter of the shell needle roller bearing in a state closer to the state in which the outer ring is fitted to the actual mounting target. It should be noted that the fact that the axial length of the fitting surface and the axial fitting length of the outer ring with respect to the mounting target are "same" is not limited to the case where the two are completely the same, and they are considered to be substantially the same. Including cases where you can. For example, when the axial fitting length of the outer ring with respect to the mounting target changes in the circumferential direction of the shell needle roller bearing, the axial length of the fitting surface is set to the average value of the fitting length. Setting is also included in the "same".

（１）前記測定部は、前記嵌合面が内周に形成された厚肉部と、前記厚肉部と前記ベース部との間に形成され、前記厚肉部よりも径方向に薄く形成された薄肉部とを有していることが好ましい。
この構成によれば、ベース部の剛性が、厚肉部の拡径量に影響を及ぼしてしまうことを薄肉部によって抑制することができる。 (1) The measuring portion is formed between the thick portion having the fitting surface formed on the inner circumference thereof and between the thick portion and the base portion, and is thinner in the radial direction than the thick portion. It is preferable to have a thinned portion.
According to this configuration, the thin portion can prevent the rigidity of the base portion from affecting the amount of diameter expansion of the thick portion.

（２）前記薄肉部は、前記厚肉部よりも内径が大きく形成されていることが好ましい。
このような構成によって、測定部のうち厚肉部の内周面（嵌合面）のみに外輪を嵌合させることができ、厚肉部における嵌合面の軸方向の長さを、実際の装着対象に対する外輪の嵌合長さと同一に設定することが容易になる。 (2) It is preferable that the thin portion has an inner diameter larger than that of the thick portion.
With such a configuration, the outer ring can be fitted only to the inner peripheral surface (fitting surface) of the thick portion of the measuring portion, and the axial length of the fitting surface in the thick portion can be calculated from the actual length. It becomes easy to set the same as the fitting length of the outer ring with respect to the mounting target.

（３）前記ベース部は、円環状に形成されるとともに、内周面の内径が前記嵌合面の内径と同一寸法に形成されていることが好ましい。
この構成によれば、ベース部の内周面を基準面として、測定部に嵌合されたシェル形針状ころ軸受の各種寸法、例えば外輪の内径等を測定することができる。 (3) It is preferable that the base portion is formed in an annular shape and the inner diameter of the inner peripheral surface is formed to be the same as the inner diameter of the fitting surface.
With this configuration, it is possible to measure various dimensions of the shell needle roller bearing fitted in the measurement unit, for example, the inner diameter of the outer ring, with the inner peripheral surface of the base unit as the reference plane.

本発明によれば、リングゲージを用いて測定したシェル形針状ころ軸受の内接円径と、実際の装着対象に装着したシェル形針状ころ軸受の内接円径との乖離を少なくすることができる。   According to the present invention, the deviation between the inscribed circle diameter of the shell needle roller bearing measured using the ring gauge and the inscribed circle diameter of the shell needle roller bearing actually mounted on the object is reduced. be able to.

十字軸継手を示す正面図（一部断面図）である。It is a front view (partial sectional view) which shows a cross joint. シェル形針状ころ軸受の断面図である。It is a sectional view of a shell type needle roller bearing. 本発明の一実施形態に係るリングゲージの断面図である。It is a sectional view of a ring gauge concerning one embodiment of the present invention. 図３の要部を拡大して示す断面図である。It is sectional drawing which expands and shows the principal part of FIG. 従来技術のリングゲージを示す断面図である。It is sectional drawing which shows the ring gauge of a prior art.

以下、図面を参照しながら本発明の実施形態を詳細に説明する。
図１は、十字軸継手を示す正面図（一部断面図）である。この十字軸継手１０は、例えば車両の操舵車輪を操舵するための操舵装置に適用されており、コラムシャフトとインターミディエイトシャフトとの間、及びインターミディエイトシャフトとステアリングシャフトとの間等の、互いに連結される２本のシャフトの間に設けられている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view (partially sectional view) showing a cross joint. The cross joint 10 is applied to, for example, a steering device for steering steered wheels of a vehicle, and is connected to each other such as between a column shaft and an intermediate shaft and between an intermediate shaft and a steering shaft. Is provided between the two shafts.

十字軸継手１０は、互いに連結される２本のシャフトのうち、一方のシャフトの端部に固定されるヨーク１１と、他方のシャフトの端部に固定されるヨーク１２と、各ヨーク１１，１２に取り付けられる針状ころ軸受１３と、針状ころ軸受１３に装着される十字軸１４とを備えている。各ヨーク１１，１２は、炭素鋼等により形成され、二股状に形成されたアーム１１ａ，１２ａを備えている。各アーム１１ａ，１２ａには針状ころ軸受１３を嵌合させるための軸受孔１１ｂ，１２ｂが形成されている。   Of the two shafts connected to each other, the cross joint 10 includes a yoke 11 fixed to an end of one shaft, a yoke 12 fixed to an end of the other shaft, and the yokes 11 and 12. The needle roller bearing 13 mounted on the needle roller bearing 13 and the cross shaft 14 mounted on the needle roller bearing 13 are provided. Each of the yokes 11 and 12 is made of carbon steel or the like and has arms 11a and 12a formed in a bifurcated shape. Bearing holes 11b and 12b for fitting the needle roller bearings 13 are formed in the respective arms 11a and 12a.

十字軸１４は、胴体部１６と、この胴体部１６の側面から四方へ十字状に突出した４つの軸部１７とを有している。十字軸１４は鋼製であり、胴体部１６と４つの軸部１７とは鍛造等により一体成形されている。そして、４本の軸部１７にぞれぞれ針状ころ軸受１３が装着される。   The cross shaft 14 has a body portion 16 and four shaft portions 17 that protrude from the side surface of the body portion 16 in four directions in a cross shape. The cross shaft 14 is made of steel, and the body 16 and the four shafts 17 are integrally formed by forging or the like. Then, the needle roller bearings 13 are attached to the four shafts 17, respectively.

図２は、針状ころ軸受の断面図である。針状ころ軸受１３は、シェル形針状ころ軸受であり、外輪２１と、複数の針状ころ２２とを有している。外輪２１は、薄肉の鋼板をプレス加工することによって有底円筒形状に形成されている。具体的に、外輪２１は、円筒形状の外輪本体２４と、外輪本体２４の軸方向の一端部を塞ぐ閉塞部２５とを有している。外輪本体２４の内周には、軌道面２４ａが形成されている。外輪本体２４の軸方向他端部には、径方向内側に折り曲げられた折曲部２６が形成されている。この折曲部２６と閉塞部２５とによって外輪２１の内部に配置された針状ころ２２の軸方向の位置が保持される。   FIG. 2 is a sectional view of the needle roller bearing. The needle roller bearing 13 is a shell needle roller bearing, and has an outer ring 21 and a plurality of needle rollers 22. The outer ring 21 is formed into a bottomed cylindrical shape by pressing a thin steel plate. Specifically, the outer race 21 has a cylindrical outer race body 24 and a closing portion 25 that closes one end of the outer race body 24 in the axial direction. A raceway surface 24 a is formed on the inner circumference of the outer ring body 24. A bent portion 26 that is bent inward in the radial direction is formed at the other end of the outer ring body 24 in the axial direction. The bent portion 26 and the closing portion 25 hold the axial position of the needle roller 22 arranged inside the outer ring 21.

針状ころ２２は、軸受鋼等によって形成されており、その外周面２２ａが転動面とされている。複数の針状ころ２２は、外輪本体２４の軌道面２４ａに沿って周方向に並べて配列され、当該軌道面２４ａ上を転動する。また、図１に示すように、複数の針状ころ２２の内側には十字軸１４の軸部１７が挿入される。複数の針状ころ２２は、軸部１７の外周面１７ａを軌道面として当該軌道面１７ａ上を転動する。   The needle roller 22 is made of bearing steel or the like, and its outer peripheral surface 22a is a rolling surface. The plurality of needle rollers 22 are arranged side by side in the circumferential direction along the raceway surface 24a of the outer ring main body 24, and roll on the raceway surface 24a. Further, as shown in FIG. 1, the shaft portion 17 of the cross shaft 14 is inserted inside the plurality of needle rollers 22. The plurality of needle rollers 22 roll on the raceway surface 17a with the outer peripheral surface 17a of the shaft portion 17 as a raceway surface.

シェル形針状ころ軸受１３は、ヨーク１１，１２の軸受孔１１ｂ，１２ｂに嵌合されることによって、複数の針状ころ２２に内接する円の直径、すなわち内接円径Ｄ０の寸法精度が得られる設計となっている。そのため、シェル形針状ころ軸受１３の製造段階において、ヨーク等の製品（装着対象）を想定したリングゲージと呼ばれる治具にシェル形針状ころ軸受１３を嵌合し、その内接円径Ｄ０を測定することによってシェル形針状ころ軸受１３の寸法精度が管理されるようになっている。   The shell-shaped needle roller bearing 13 is fitted in the bearing holes 11b and 12b of the yokes 11 and 12, so that the dimensional accuracy of the diameter of the circle inscribed in the plurality of needle rollers 22 can be improved. It is designed to be obtained. Therefore, at the manufacturing stage of the shell needle roller bearing 13, the shell needle roller bearing 13 is fitted to a jig called a ring gauge that is intended for a product (mounting target) such as a yoke, and its inscribed circle diameter D0 is used. The dimensional accuracy of the shell needle roller bearing 13 is controlled by measuring

図３は、本発明の一実施形態に係るリングゲージの一部断面図である。
本実施形態のリングゲージ３１は、ヨーク１１，１２と比較して硬度が高い工具鋼等によって形成され、測定部３２と、ベース部３３とを備えている。測定部３２は、円筒形状に形成されている。測定部３２の軸方向一方側には、より径方向に厚く形成された厚肉部４１が設けられ、他方側には、より径方向に薄く形成された薄肉部４２が形成されている。 FIG. 3 is a partial cross-sectional view of the ring gauge according to the embodiment of the present invention.
The ring gauge 31 of the present embodiment is formed of tool steel or the like having a hardness higher than that of the yokes 11 and 12, and includes a measuring portion 32 and a base portion 33. The measuring part 32 is formed in a cylindrical shape. A thick portion 41 formed thicker in the radial direction is provided on one side in the axial direction of the measuring portion 32, and a thin portion 42 formed thinner in the radial direction is formed on the other side.

厚肉部４１の外径と薄肉部４２の外径とは同一寸法に形成されている。したがって、測定部３２は、一定の外径Ｄ１を有している。また、厚肉部４１の内径Ｄ２は、薄肉部４２の内径Ｄ３よりも小さい。厚肉部４１の内周面４１ａと薄肉部４２の内周面４２ａとの境界には段部４３が形成されている。厚肉部４１の内周面４１ａは、シェル形針状ころ軸受１３の外輪２１を嵌合させる嵌合面とされている。   The outer diameter of the thick portion 41 and the outer diameter of the thin portion 42 are formed to have the same size. Therefore, the measuring section 32 has a constant outer diameter D1. Further, the inner diameter D2 of the thick portion 41 is smaller than the inner diameter D3 of the thin portion 42. A step portion 43 is formed at the boundary between the inner peripheral surface 41 a of the thick portion 41 and the inner peripheral surface 42 a of the thin portion 42. The inner peripheral surface 41a of the thick portion 41 is a fitting surface on which the outer ring 21 of the shell-shaped needle roller bearing 13 is fitted.

図４にも示すように、この嵌合面４１ａの軸方向の長さＬ１は、シェル形針状ころ軸受１３が嵌合されるヨーク１１，１２の軸受孔１１ｂ，１２ｂ（図１参照）の軸方向長さ（外輪２１の嵌合長さ）と同一であり、シェル形針状ころ軸受１３の外輪２１の軸方向の長さＬ２よりも短く形成されている。なお、軸受孔１１ｂ，１２ｂの軸方向の長さが一定ではなく周方向に変化しているような場合には、その軸方向の長さの平均値と同一となるように、嵌合面４１ａの長さＬ１が設定される。   As shown in FIG. 4, the axial length L1 of the fitting surface 41a is determined by the bearing holes 11b and 12b (see FIG. 1) of the yokes 11 and 12 into which the shell needle roller bearing 13 is fitted. The length is the same as the axial length (fitting length of the outer ring 21) and is shorter than the axial length L2 of the outer ring 21 of the shell-shaped needle roller bearing 13. When the axial lengths of the bearing holes 11b and 12b are not constant but are changing in the circumferential direction, the fitting surface 41a is adjusted so as to be equal to the average value of the axial lengths. L1 is set.

シェル形針状ころ軸受１３は、閉塞部２５の外面が厚肉部４１の軸方向の一端面と面一となるように厚肉部４１に嵌合される。この場合、薄肉部４２の内周面４２ａは、厚肉部４１に嵌合された外輪２１には接触せず、外輪２１との間に隙間Ｓが形成される。ただし、シェル形針状ころ軸受１３は、閉塞部２５の外面が厚肉部４１の軸方向一端面と面一にならないように厚肉部４１に嵌合される場合もあり得る。   The shell needle roller bearing 13 is fitted into the thick portion 41 such that the outer surface of the closed portion 25 is flush with one end surface of the thick portion 41 in the axial direction. In this case, the inner peripheral surface 42 a of the thin portion 42 does not contact the outer ring 21 fitted in the thick portion 41, and a gap S is formed between the inner peripheral surface 42 a and the outer ring 21. However, the shell needle roller bearing 13 may be fitted to the thick portion 41 so that the outer surface of the closed portion 25 does not become flush with the axial one end surface of the thick portion 41.

嵌合面４１ａの内径Ｄ２は、ヨーク１１，１２の軸受孔１１ｂ，１２ｂの内径と同一とされている。したがって、針状ころ２２を組み込んだ外輪２１を厚肉部４１に嵌合させることによって、軸受孔１１ｂ，１２ｂに外輪２１を嵌合させたときと同じ状態を形成することができる。そして、測定部３２の厚肉部４１に外輪２１を嵌合させた状態で複数の針状ころ２２の内接円径Ｄ０を測定することで、シェル形針状ころ軸受１３の寸法精度が評価される。   The inner diameter D2 of the fitting surface 41a is the same as the inner diameter of the bearing holes 11b and 12b of the yokes 11 and 12. Therefore, by fitting the outer ring 21 incorporating the needle rollers 22 into the thick portion 41, the same state as when the outer ring 21 is fitted into the bearing holes 11b and 12b can be formed. The dimensional accuracy of the shell needle roller bearing 13 is evaluated by measuring the inscribed circle diameter D0 of the plurality of needle rollers 22 with the outer ring 21 fitted to the thick portion 41 of the measuring unit 32. To be done.

具体的に、シェル形針状ころ軸受１３の内接円径Ｄ０は、図３に示すように、シェル形針状ころ軸受１３にピンゲージ３５を挿入することによって測定される。ピンゲージ３５は、例えば１μｍ単位で外径が異なるものが複数準備され、所定の条件でピンゲージ３５をシェル形針状ころ軸受１３に挿入することができた場合に、そのピンゲージ３５の外径を内接円径Ｄ０として測定する。   Specifically, the inscribed circle diameter D0 of the shell needle roller bearing 13 is measured by inserting a pin gauge 35 into the shell needle roller bearing 13 as shown in FIG. A plurality of pin gauges 35 having different outer diameters, for example, in units of 1 μm are prepared, and when the pin gauge 35 can be inserted into the shell-shaped needle roller bearing 13 under predetermined conditions, the outer diameter of the pin gauge 35 is set to the inner diameter. It is measured as a contact circle diameter D0.

ベース部３３は、円環状に形成され、測定部３２の薄肉部４２に隣接して測定部３２と同心状に設けられている。ベース部３３の軸方向の長さＬ３は、測定部３２の軸方向の長さＬ４と略同一とされていてもよいし、略同一でなくてもよい。ベース部３３の外径Ｄ４は、測定部３２の外径Ｄ１よりも大きく形成されている。したがって、ベース部３３は、測定部３２よりも径方向外方へ突出している。ベース部３３は、軸方向の長さＬ３よりも径方向の肉厚が大きくなるように形成されている。   The base portion 33 is formed in an annular shape, and is provided adjacent to the thin portion 42 of the measuring portion 32 and concentrically with the measuring portion 32. The axial length L3 of the base portion 33 may or may not be substantially the same as the axial length L4 of the measuring portion 32. The outer diameter D4 of the base portion 33 is formed larger than the outer diameter D1 of the measuring portion 32. Therefore, the base portion 33 projects radially outward from the measurement portion 32. The base portion 33 is formed so that the radial thickness thereof is larger than the axial length L3.

ベース部３３の内径Ｄ５は、測定部３２における厚肉部４１の内径Ｄ２と同一寸法とされている。ベース部３３の内周面３３ａと測定部３２の薄肉部４２の内周面との境界には段部４４が形成されている。したがって、リングゲージ３１は、内周面の軸方向の中間部に周方向に沿った凹溝４５が形成された形態となっている。ベース部３３の内周面３３ａは、嵌合面４１ａと同一の寸法精度で加工される。そして、ベース部３３の内周面３３ａは、測定部３２に嵌合された針状ころ軸受１３の各種寸法を測定するための基準面とされる。例えば、外輪２１の軌道面２４ａの内径や母線形状がベース部３３の内周面３３ａを基準として測定される。   The inner diameter D5 of the base portion 33 has the same dimension as the inner diameter D2 of the thick portion 41 of the measuring portion 32. A step portion 44 is formed at the boundary between the inner peripheral surface 33 a of the base portion 33 and the inner peripheral surface of the thin portion 42 of the measuring portion 32. Therefore, the ring gauge 31 has a form in which the concave groove 45 along the circumferential direction is formed in the axially intermediate portion of the inner circumferential surface. The inner peripheral surface 33a of the base portion 33 is processed with the same dimensional accuracy as the fitting surface 41a. The inner peripheral surface 33a of the base portion 33 serves as a reference surface for measuring various dimensions of the needle roller bearing 13 fitted in the measuring portion 32. For example, the inner diameter and generatrix shape of the raceway surface 24a of the outer ring 21 are measured with the inner peripheral surface 33a of the base portion 33 as a reference.

ベース部３３の外周面３３ｂには滑り止め用のローレット加工が施されている。ベース部３３は、測定部３２よりも大径であり、測定部３２から径方向に突出しているので、リングゲージ３１を取り扱う際の把持部として好適に利用することができる。
また、ベース部３３は、リングゲージ３１に所定の荷重を与えるためのウエイトとしても機能している。本実施形態では、測定部３２に針状ころ軸受１３を嵌合した状態で、針状ころ軸受１３に外径の異なる複数のピンゲージ３５を順次挿入していき、複数の針状ころ２２にピンゲージ３５が接触した状態で、ベース部３３の荷重によってピンゲージ３５から針状ころ軸受１３が抜け落ちない場合と抜け落ちた場合との境界で用いられたピンゲージ３５の外径を針状ころ軸受１３の内接円径Ｄ０として測定するようになっている。 The outer peripheral surface 33b of the base portion 33 is knurled to prevent slipping. Since the base portion 33 has a larger diameter than the measuring portion 32 and protrudes from the measuring portion 32 in the radial direction, it can be suitably used as a grip portion when handling the ring gauge 31.
Further, the base portion 33 also functions as a weight for applying a predetermined load to the ring gauge 31. In the present embodiment, the pin gauges 35 having different outer diameters are sequentially inserted into the needle roller bearing 13 in a state where the needle roller bearing 13 is fitted in the measuring portion 32, and the pin gauges are inserted into the needle rollers 22. When the needle roller bearing 13 is in contact with the needle roller bearing 13, the outer diameter of the pin gauge 35 used at the boundary between the case where the needle roller bearing 13 does not slip off from the pin gauge 35 due to the load of the base portion 33 It is designed to be measured as a circle diameter D0.

測定部３２は、ヨーク１１，１２の軸受孔１１ｂ，１２ｂに針状ころ軸受１３を嵌合させたときのヨーク１１，１２の拡径量と、測定部３２に針状ころ軸受１３を嵌合させたときの拡径量とが略同一となるように、径方向の剛性が設定されている。すなわち、測定部３２は、ヨーク１１，１２等の装着対象と略同一の径方向の剛性を有している。具体的には、ヨーク１１，１２の軸受孔１１ｂ，１２ｂに針状ころ軸受１３を嵌合したときにヨーク１１，１２に付与される径方向の負荷と、その負荷によるヨーク１１，１２の拡径量とを解析により求め、その拡径量と同一の量で測定部３２が拡径するように測定部３２の肉厚等が解析により求められる。   The measuring portion 32 fits the needle roller bearing 13 to the measuring portion 32 and the diameter expansion amount of the yoke 11 and 12 when the needle roller bearing 13 is fitted into the bearing holes 11b and 12b of the yokes 11 and 12. The rigidity in the radial direction is set so that the amount of expansion when made to be substantially the same. That is, the measuring unit 32 has substantially the same radial rigidity as the yoke 11, 12 or the like to be mounted. Specifically, the radial load applied to the yokes 11 and 12 when the needle roller bearing 13 is fitted into the bearing holes 11b and 12b of the yokes 11 and 12, and the expansion of the yokes 11 and 12 due to the load. The diameter amount is obtained by analysis, and the wall thickness and the like of the measurement portion 32 is obtained by analysis so that the measurement portion 32 expands in the same amount as the diameter expansion amount.

このように、測定部３２は、針状ころ軸受１３を嵌合させたときに、実際の装着対象に針状ころ軸受１３を嵌合させたときの拡径量と略同一の量で拡径するため、測定部３２に嵌合させた状態で測定した針状ころ軸受１３の内接円径Ｄ０と、装着対象に針状ころ軸受１３を嵌合させたときの内接円径Ｄ０との乖離を小さくすることができる。そのため、十字軸継手１０のヨーク１１，１２に針状ころ軸受１３を嵌合し、針状ころ軸受１３の内部に十字軸１４の軸部１７を挿入したときに、軸部１７と針状ころ２２との間に大きな隙間が生じることによって十字軸継手１０にガタが生じるのを防止することができる。特に、車両の操舵装置においては、十字軸継手１０にガタがあるとステアリング操作に悪影響を及ぼすため、本実施形態におけるリングゲージ３１を用いた寸法精度の管理がより有効である。   As described above, when the needle roller bearing 13 is fitted, the measuring unit 32 expands the diameter by substantially the same amount as the diameter expansion amount when the needle roller bearing 13 is actually fitted to the fitting target. Therefore, the inscribed circle diameter D0 of the needle roller bearing 13 measured with the needle roller bearing 13 fitted in the measuring section 32 and the inscribed circle diameter D0 when the needle roller bearing 13 is fitted in the mounting target are The deviation can be reduced. Therefore, when the needle roller bearing 13 is fitted into the yokes 11 and 12 of the cross shaft joint 10 and the shaft portion 17 of the cross shaft 14 is inserted into the needle roller bearing 13, the shaft portion 17 and the needle roller bearing 13 are inserted. It is possible to prevent rattling of the cross shaft joint 10 due to the formation of a large gap between the cross shaft joint 22 and the joint 22. In particular, in a vehicle steering system, looseness in the cross joint 10 adversely affects the steering operation. Therefore, the dimensional accuracy management using the ring gauge 31 in the present embodiment is more effective.

ベース部３３は、測定部３２よりも径方向に厚く形成され、測定部３２より剛性が高い。そのため、測定部３２は、ベース部３３の近傍においてベース部３３の影響を受けて剛性が高まる傾向にある。しかし、本実施形態では、針状ころ軸受１３が嵌合される厚肉部４１とベース部３３との間に薄肉部４２が形成され、薄肉部４２の剛性を厚肉部４１よりも低下させることによって、ベース部３３の剛性が厚肉部４１に与える影響を可及的に小さくしている。   The base portion 33 is formed thicker in the radial direction than the measuring portion 32, and has higher rigidity than the measuring portion 32. Therefore, the rigidity of the measurement unit 32 tends to increase under the influence of the base unit 33 in the vicinity of the base unit 33. However, in the present embodiment, the thin portion 42 is formed between the thick portion 41 into which the needle roller bearing 13 is fitted and the base portion 33, and the rigidity of the thin portion 42 is made lower than that of the thick portion 41. As a result, the influence of the rigidity of the base portion 33 on the thick portion 41 is minimized.

本発明は、上記実施形態に限定されるものではなく、特許請求の範囲に記載された発明の範囲内において適宜変更できるものである。
例えば、測定部３２の薄肉部４２は、測定部３２の外周面に凹溝を形成することによって構成してもよい。ただし、上記実施形態のように、測定部３２の内周面に凹溝４５を形成することによって薄肉部４２を形成すると、厚肉部４１の嵌合面４１ａの軸方向の長さを、実際の装着対象に対する外輪２１の嵌合長さと同一寸法に設定し易くなるため、好適である。 The present invention is not limited to the above embodiment, but can be appropriately modified within the scope of the invention described in the claims.
For example, the thin portion 42 of the measuring section 32 may be configured by forming a groove on the outer peripheral surface of the measuring section 32. However, when the thin portion 42 is formed by forming the concave groove 45 on the inner peripheral surface of the measuring portion 32 as in the above embodiment, the axial length of the fitting surface 41 a of the thick portion 41 is actually Since it is easy to set the same size as the fitting length of the outer ring 21 with respect to the mounting target, it is preferable.

本発明の針状ころ軸受１３の外輪２１は、有底円筒形状（クローズエンドタイプ）に限らず、軸方向両端が開放した円筒形状（オープンエンドタイプ）のものであってもよい。   The outer ring 21 of the needle roller bearing 13 of the present invention is not limited to a bottomed cylindrical shape (closed end type), but may be a cylindrical shape (open end type) with both axial ends open.

１１：ヨーク（装着対象）、１３：シェル形針状ころ軸受、２１：外輪、２２：針状ころ、２２ａ：外周面、３１：リングゲージ、３２：測定部、３３：ベース部、３３ａ：内周面、４１：厚肉部、４１ａ：内周面（嵌合面）、４２：薄肉部、Ｄ０：内接円径   11: Yoke (Mounting target), 13: Shell type needle roller bearing, 21: Outer ring, 22: Needle roller, 22a: Outer peripheral surface, 31: Ring gauge, 32: Measuring part, 33: Base part, 33a: Inner Peripheral surface, 41: thick part, 41a: inner peripheral surface (fitting surface), 42: thin part, D0: inscribed circle diameter

Claims (5)

シェル形針状ころ軸受における外輪の外周面を嵌合させるための嵌合面を内周に有する円筒形状の測定部と、
前記測定部に対して軸方向に隣接して設けられ、前記測定部よりも外径及び重量の大きいベース部と、を備え、
前記測定部は、針状ころを組み込んだ前記外輪を前記嵌合面に嵌合させたときの前記測定部の拡径量が、前記外輪を実際の装着対象に嵌合させたときの前記装着対象の拡径量と同一となるような径方向の剛性を有している、シェル形針状ころ軸受用リングゲージ。 A cylindrical measuring part having a fitting surface on the inner circumference for fitting the outer peripheral surface of the outer ring in the shell needle roller bearing,
A base portion that is provided adjacent to the measuring portion in the axial direction and has a larger outer diameter and weight than the measuring portion,
The measuring unit has a diameter expansion amount of the measuring unit when the outer ring incorporating needle rollers is fitted to the fitting surface, and the mounting when the outer ring is fitted to an actual mounting target. A ring gauge for needle roller bearings with a radial rigidity that is the same as the target diameter expansion amount. 前記嵌合面は、前記装着対象に対する前記外輪の軸方向の嵌合長さと同一の軸方向の長さを有している、請求項１に記載のシェル形針状ころ軸受用リングゲージ。   The shell type needle roller bearing ring gauge according to claim 1, wherein the fitting surface has an axial length that is the same as the axial fitting length of the outer ring with respect to the mounting target. 前記測定部は、前記嵌合面が内周に形成された厚肉部と、前記厚肉部と前記ベース部との間に形成され、前記厚肉部よりも径方向に薄く形成された薄肉部とを有している、請求項１又は２に記載のシェル形針状ころ軸受用リングゲージ。   The measurement part is formed between the thick part having the fitting surface formed on the inner periphery and the thick part and the base part, and is thin in the radial direction than the thick part. The shell-type needle roller bearing ring gauge according to claim 1 or 2, further comprising: 前記薄肉部は、前記厚肉部よりも内径が大きく形成されている、請求項３に記載のシェル形針状ころ軸受用リングゲージ。   The shell type needle roller bearing ring gauge according to claim 3, wherein the thin portion has an inner diameter larger than that of the thick portion. 前記ベース部は、円環状に形成されるとともに、内周面の内径が前記嵌合面の内径と同一寸法に形成されている、請求項１〜４のいずれかに記載のシェル形針状ころ軸受用リングゲージ。   The shell-shaped needle roller according to any one of claims 1 to 4, wherein the base portion is formed in an annular shape and the inner diameter of the inner peripheral surface is formed to be the same as the inner diameter of the fitting surface. Ring gauge for bearings.
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