JP2015044220A - Method for manufacturing waveform retainer and waveform retainer - Google Patents
Method for manufacturing waveform retainer and waveform retainer Download PDFInfo
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- JP2015044220A JP2015044220A JP2013176652A JP2013176652A JP2015044220A JP 2015044220 A JP2015044220 A JP 2015044220A JP 2013176652 A JP2013176652 A JP 2013176652A JP 2013176652 A JP2013176652 A JP 2013176652A JP 2015044220 A JP2015044220 A JP 2015044220A
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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
- F16C33/38—Ball cages
- F16C33/42—Ball cages made from wire or sheet metal strips
- F16C33/422—Ball cages made from wire or sheet metal strips made from sheet metal
- F16C33/427—Ball cages made from wire or sheet metal strips made from sheet metal from two parts, e.g. ribbon cages with two corrugated annular parts
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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
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
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Abstract
Description
この発明は、ラジアル玉軸受等、自動車のトランスミッション、カーエアコン用コンプレッサ等の自動車用補機、或いは、一般産業用の各種機械等の回転支持部分に組み込まれる各種転がり軸受を構成する、玉を保持する波形保持器の製造方法及び波形保持器の構造の改良に関する。 The present invention holds a ball that constitutes various rolling bearings incorporated in a rotational support portion of a radial ball bearing or the like, an automobile auxiliary machine such as a car transmission, a compressor for a car air conditioner, or various machines for general industries. The present invention relates to a method for manufacturing a waveform holder and an improvement in the structure of the waveform holder.
各種機械装置の回転支持部に組み込む転がり軸受として、例えば図７に示す様な単列深溝型の玉軸受１が、広く使用されている。この玉軸受１は、外周面に内輪軌道２を有する内輪３と、内周面に外輪軌道４を有する外輪５と、これら内輪軌道２と外輪軌道４との間に転動自在に設けられた複数個の玉６と、これら各玉６を転動自在に保持する保持器７とを備える。 For example, a single row deep groove type ball bearing 1 as shown in FIG. 7 is widely used as a rolling bearing to be incorporated in a rotation support portion of various mechanical devices. The ball bearing 1 is provided between an inner ring 3 having an inner ring raceway 2 on an outer peripheral surface, an outer ring 5 having an outer ring raceway 4 on an inner peripheral surface, and the inner ring raceway 2 and the outer ring raceway 4 so as to be capable of rolling. A plurality of balls 6 and a cage 7 that holds the balls 6 so as to roll freely are provided.
このうちの保持器７は、例えば特許文献１〜５に記載されている様な、波形保持器と呼ばれるもので、図８、１０に示す様に、１対の保持器素子８、８を複数本のリベット９、９により接合して成る。これら両保持器素子８、８は、鋼板、ステンレス鋼板等の金属板製の素材に、プレスによる打ち抜き加工及び曲げ加工を施す事により、全体を波形の円環状に造られている。この様な両保持器素子８、８は、円周方向複数箇所に部分球面状の曲板部１０、１０を、円周方向に隣り合う曲板部１０、１０同士の間に平板部１１、１１を、これら各平板部１１、１１の周方向中央部に貫通孔１２、１２を、それぞれ備える。又、前記各リベット９、９は、鋼、ステンレス鋼等の金属製で、杆部１３と、この杆部１３の基端部に設けられた頭部１５とを備える。 Of these, the retainer 7 is called a waveform retainer as described in, for example, Patent Documents 1 to 5, and includes a plurality of pairs of retainer elements 8 and 8 as shown in FIGS. The rivets 9 and 9 are joined together. Both of these cage elements 8 and 8 are formed into a corrugated annular shape by punching and bending a metal plate material such as a steel plate and a stainless steel plate by a press. Both of these cage elements 8, 8 include a plurality of circumferentially curved curved plate portions 10, 10 at a plurality of locations in the circumferential direction, and a flat plate portion 11, between the curved plate portions 10, 10 adjacent in the circumferential direction, 11 is provided with through-holes 12 and 12 in the center in the circumferential direction of the flat plate portions 11 and 11, respectively. Each of the rivets 9 and 9 is made of a metal such as steel or stainless steel, and includes a flange portion 13 and a head portion 15 provided at a base end portion of the flange portion 13.
前記保持器７は、前記両保持器素子８、８の各平板部１１、１１の内側面同士を互いに突き合わせると共に、これら各平板部１１、１１の互いに整合する位置に形成した前記各貫通孔１２、１２に、前記リベット９、９の杆部１３を挿通した状態で、これら各杆部１３の先端部を押し潰してかしめ部１４を形成し、互いに突き合わせた前記各平板部１１、１１同士を、前記各リベット９、９の頭部１５とかしめ部１４とで挟持する事により接合している。そして、この状態で、前記各曲板部１０、１０に囲まれた部分を、それぞれ前記各玉６を転動自在に保持する為のポケット１６、１６としている。 The retainer 7 abuts the inner surfaces of the flat plate portions 11 and 11 of the retainer elements 8 and 8 with each other, and the through holes formed at positions where the flat plate portions 11 and 11 are aligned with each other. 12 and 12, with the flanges 13 of the rivets 9 and 9 being inserted, the tip portions of the flanges 13 are crushed to form the crimped portions 14, and the flat plate portions 11 and 11 that are butted against each other Are joined by being sandwiched between the head 15 and the caulking portion 14 of each of the rivets 9 and 9. In this state, the portions surrounded by the curved plate portions 10 and 10 serve as pockets 16 and 16 for holding the balls 6 in a rollable manner.
上述の様な保持器７を備えた玉軸受１は、例えば、スクロールコンプレッサの可動スクロールにその一端部を連結された回転軸の他端部等の回転支持部分に組み込まれて、前記内輪３と前記外輪５とが偏心或いは傾斜した状況下で使用される場合がある。この様な場合には、運転中、前記各玉６から前記保持器７に大きな力が作用する可能性がある為、この様な場合には、この保持器７の耐久性を十分に確保しておく必要がある。具体的には、この保持器７を構成する、前記両保持器素子８、８及び前記各リベット９、９の強度を十分に確保しておく必要がある。これら各部材８、９の強度を向上させる方法としては、これら両保持器素子８、８の肉厚やこれら各リベット９、９の直径を大きくする方法があるが、寸法制約上、採用できない場合も少なくない。これに対し、前記各部材８、９の寸法変化を殆ど伴う事なく、同様の目的を達成できる方法として、これら各部材８、９の表面に窒化層（窒化処理による表面硬化層）を形成する方法が、特許文献２に記載される等により、従来から広く知られている。以下、この特許文献２に記載された発明に就いて、図９を参照しつつ説明する。 The ball bearing 1 having the cage 7 as described above is incorporated in a rotation support portion such as the other end portion of a rotating shaft connected to a movable scroll of a scroll compressor. The outer ring 5 may be used in a situation where it is eccentric or inclined. In such a case, a large force may be applied to the cage 7 from the balls 6 during operation. In such a case, the durability of the cage 7 is sufficiently ensured. It is necessary to keep. Specifically, it is necessary to sufficiently secure the strength of the two retainer elements 8 and 8 and the rivets 9 and 9 constituting the retainer 7. As a method of improving the strength of each of these members 8 and 9, there is a method of increasing the thickness of both of these cage elements 8 and 8 and the diameter of each of these rivets 9 and 9, but cannot be adopted due to dimensional constraints. Not a few. On the other hand, a nitrided layer (surface hardened layer by nitriding treatment) is formed on the surface of each member 8 and 9 as a method that can achieve the same purpose with almost no dimensional change of each member 8 and 9. The method has been widely known, for example, as described in Patent Document 2. Hereinafter, the invention described in Patent Document 2 will be described with reference to FIG.
前記特許文献２に記載された発明の場合、先ず、図９に示す様に、両保持器素子８、８の各平板部１１、１１の内側面同士を、隙間を介した状態で対向させると共に、これら各平板部１１、１１の互いに整合する部分に形成した貫通孔１２、１２に、前記各リベット９、９の杆部１３、１３を挿通して、中間組立体１７とする。尚、この中間組立体１７の状態で、これら各リベット９、９の杆部１３、１３の外周面と、これら各貫通孔１２、１２の内周面との間には隙間が設けられている。次いで、前記中間組立体１７に対して、窒化処理を施す。尚、窒化処理の方法に関しては、従来から行われている窒化処理の方法と同様であり、特許文献２にも記載されている為、説明は省略する。その後、前記両保持器素子８、８の各平板部１１、１１の内側面同士を突き合せた状態で、前記各リベット９、９の杆部１３、１３の先端部をかしめる事により、前記両保持器素子８、８同士を結合固定する。 In the case of the invention described in Patent Document 2, first, as shown in FIG. 9, the inner side surfaces of the flat plate portions 11, 11 of both the cage elements 8, 8 are opposed to each other through a gap. The flanges 13 and 13 of the rivets 9 and 9 are inserted into the through holes 12 and 12 formed in the matching portions of the flat plates 11 and 11 to form an intermediate assembly 17. In the state of the intermediate assembly 17, a gap is provided between the outer peripheral surface of the flanges 13 and 13 of the rivets 9 and 9 and the inner peripheral surface of the through holes 12 and 12. . Next, the intermediate assembly 17 is subjected to nitriding treatment. The nitriding method is the same as the conventional nitriding method, and is also described in Patent Document 2, so that the description thereof is omitted. Then, in the state where the inner side surfaces of the flat plate portions 11, 11 of both the cage elements 8, 8 are abutted with each other, by crimping the tips of the flange portions 13, 13 of the rivets 9, 9, Both cage elements 8, 8 are coupled and fixed together.
この様な特許文献２に記載された発明の場合、図１０に示す様に、前記両保持器素子８、８の表面、及び、前記リベット９、９の表面に窒化層２２を形成して、前記保持器７の耐久性の向上を図る事ができる。但し、前述の様な中間組立体１７の状態で、前記各リベット９、９は、前記各貫通孔１２、１２に対して軸方向の抜け止めを図られていない。この為、窒化処理を施す装置に前記中間組立体１７を組み込む際、或いは、窒化処理の際、前記リベット９、９が前記各貫通孔１２、１２から抜け落ちてしまう可能性がある。 In the case of the invention described in Patent Document 2 as described above, as shown in FIG. 10, a nitride layer 22 is formed on the surfaces of both the cage elements 8 and 8 and the surfaces of the rivets 9 and 9, The durability of the cage 7 can be improved. However, in the state of the intermediate assembly 17 as described above, the rivets 9 and 9 are not prevented from coming off in the axial direction with respect to the through holes 12 and 12. For this reason, when the intermediate assembly 17 is incorporated into a nitriding apparatus or when the nitriding process is performed, the rivets 9 and 9 may fall out of the through holes 12 and 12.
尚、前記特許文献２には、前記両保持器素子８、８のうち、一方（図９の上方）の保持器素子８の各貫通孔１２、１２にのみ、前記各リベット９、９を挿通する事により構成した中間組立体、即ち、図９に示した中間組立体１７から他方（図９の下方）の保持器素子８を省略した中間組立体に対して、窒化処理を施すと共に、この他方の保持器素子８には、単体の状態で窒化処理を施した後、これら両保持器素子８、８同士を前記各リベット９、９により結合固定する発明も記載されている。しかしながら、この様な発明の場合も、上述した発明の場合と同様の問題、即ち、窒化処理の際に、前記各リベット９、９が前記各貫通孔１２、１２から抜け落ちる可能性があると言った問題を有している。 In Patent Document 2, the rivets 9 and 9 are inserted only into the through holes 12 and 12 of one of the cage elements 8 (upper side in FIG. 9) of the cage elements 8 and 8. The intermediate assembly constituted by this, that is, the intermediate assembly in which the other retainer element 8 (downward in FIG. 9) is omitted from the intermediate assembly 17 shown in FIG. The other cage element 8 also describes an invention in which after nitriding is performed in a single state, both the cage elements 8 and 8 are bonded and fixed to each other by the rivets 9 and 9. However, in the case of such an invention, the same problem as in the case of the above-described invention, that is, the rivets 9 and 9 may fall out of the through-holes 12 and 12 during the nitriding process. Have problems.
又、特許文献２には、前記両保持器素子８、８及び前記各リベット９、９に対して、それぞれ単体の状態で窒化処理を施す事に就いても記載されている。但し、前記各リベット９、９に、単体の状態で窒化処理を施す場合、これら各リベット９、９は非常に小さい部品であり、これら各リベット９、９の全表面に窒化処理を施す為には、窒化処理の工程で面倒な作業、及び、特別な装置（治具等）が必要になる場合がある。具体的には、前記各リベット９、９の様な小さい部品に窒化処理を施す場合、これら各リベット９、９を、かご等にまとめて入れた状態で窒化処理を施す事が考えられる。しかしながら、この様な状態でこれら各リベット９、９に窒化処理を施すと、前記各リベット９、９同士が当接した（重なった）部分には、窒素が入りづらくなる。この結果、これら各リベット９、９のどの部分に表面硬化層が形成されたかを把握する事が困難となり、これら各リベット９、９の強度を安定して向上させられない可能性がある。これに対して、前記各リベット９、９を、これら各リベット９、９同士が当接しない様に整列させた状態で、窒化処理を施す場合、これら各リベット９、９を整列させる為の面倒な作業、及び、これら各リベット９、９が倒れる事を防止する為の治具等が必要になり、製造コストが嵩んでしまう。 Further, Patent Document 2 also describes that both the cage elements 8 and 8 and the rivets 9 and 9 are subjected to nitriding treatment in a single state. However, when each of the rivets 9 and 9 is subjected to nitriding treatment in a single state, each of the rivets 9 and 9 is a very small part, and in order to perform nitriding treatment on the entire surface of each of the rivets 9 and 9 In some cases, troublesome work and special equipment (such as jigs) are required in the nitriding process. Specifically, when nitriding is performed on small parts such as the rivets 9 and 9, it is conceivable to perform nitriding with the rivets 9 and 9 being put together in a cage or the like. However, when the rivets 9 and 9 are subjected to nitriding treatment in such a state, it is difficult for nitrogen to enter the portion where the rivets 9 and 9 are in contact with each other (overlap). As a result, it is difficult to grasp in which part of the rivets 9 and 9 the surface hardened layer is formed, and the strength of the rivets 9 and 9 may not be stably improved. On the other hand, when nitriding is performed in a state where the rivets 9 and 9 are aligned so that the rivets 9 and 9 do not come into contact with each other, it is troublesome to align the rivets 9 and 9. And a jig or the like for preventing the rivets 9 and 9 from falling down is necessary, and the manufacturing cost increases.
［先発明の説明］
そこで、本発明の発明者は、前記各リベット９、９の、前記各保持器素子８、８の各貫通孔１２、１２に対する抜け止めを図るべく、以下の様な発明を考え出した。
以下、この先発明に就いて、図１１を参照しつつ説明する。
この先発明の場合、前記かしめ部１４（図１０参照）を形成する以前の状態で、前記各リベット９、９の杆部１３のうちの頭部１５寄り部分に大径部１８を設けている。この大径部１８は、その外径寸法Ｄ１８が、一方｛図１１（ｂ）の上方｝の保持器素子８の各貫通孔１２の内径寸法ｄ１２よりも僅かに大きい（Ｄ１８＞ｄ８）。又、前記各リベット９、９の杆部１３のうちの前記大径部１８以外の部分の外径寸法Ｄ１３は、前記一方の保持器素子８の貫通孔の内径寸法ｄ８よりも小さい（Ｄ１３＜ｄ８）。尚、図１１に示す構造の場合、他方の保持器素子８の各貫通孔１２の内径寸法は、前記一方の保持器素子８の各貫通孔１２の内径寸法と等しい。
[Description of Prior Invention]
Accordingly, the inventors of the present invention have devised the following invention in order to prevent the rivets 9 and 9 from coming off from the through holes 12 and 12 of the cage elements 8 and 8.
Hereinafter, the prior invention will be described with reference to FIG.
In the case of this prior invention, a large-diameter portion 18 is provided in a portion closer to the head portion 15 of the flange portion 13 of each of the rivets 9 and 9 before the caulking portion 14 (see FIG. 10) is formed. The large-diameter portion 18 has an outer diameter D 18 slightly larger than the inner diameter d 12 of each through-hole 12 of the cage element 8 on the one side {above FIG. 11B) (D 18 > d 8 ). Further, the outer diameter D 13 of the ridges 13 of the respective rivets 9 and 9 other than the large diameter portion 18 is smaller than the inner diameter d 8 of the through hole of the one cage element 8 ( D 13 <d 8 ). In the case of the structure shown in FIG. 11, the inner diameter of each through hole 12 of the other cage element 8 is equal to the inner diameter of each through hole 12 of the one retainer element 8.
この様な先発明の場合、図１１（ａ）に示す様に、前記一方の保持器素子８の外側（図１１の上側）に前記各リベット９の頭部１５を配置すると共に、前記大径部１８を、前記各貫通孔１２に内嵌した状態で、前記各リベット９を、前記一方の保持器素子８に仮止めする事により、中間組立体１７ａを構成している。次いで、この中間組立体１７ａに対して窒化処理を施す。一方、前記他方の保持器素子８には、単体の状態で窒化処理を施す。 In the case of such a prior invention, as shown in FIG. 11A, the heads 15 of the rivets 9 are arranged outside the one cage element 8 (upper side in FIG. 11), and the large diameter The intermediate assembly 17a is configured by temporarily fixing each rivet 9 to the one retainer element 8 with the portion 18 fitted in each through-hole 12. Next, nitriding is performed on the intermediate assembly 17a. On the other hand, the other cage element 8 is subjected to nitriding in a single state.
従って、上述の様な先発明の場合、前記他方の保持器素子８は、その周面の全体に窒化層が形成されている。一方、前記中間組立体１７ａは、前記各リベット９、９の大径部１８を、前記一方の保持器素子８の貫通孔１２に内嵌している。この為、この大径部１８及びこの大径部１８と当接している前記一方の保持器素子８の貫通孔１２の内周面部分には、窒化層が形成されていない。尚、前記リベット９、９の頭部１５の内側面（図１１の下面）と、前記一方の保持器素子８の外側面（図１１の上面）とを当接させた場合には、当該部分にも窒化層は形成されない。一方、前記中間組立体１７ａの状態で、前記リベット９、９の頭部１５の内側面と、前記一方の保持器素子８の外側面との間に隙間を設けている場合には、前記リベット９、９の頭部１５の内側面と、前記一方の保持器素子８の外側面とが対向する部分にも窒化層が形成される。 Therefore, in the case of the prior invention as described above, the other cage element 8 has a nitride layer formed on the entire peripheral surface thereof. On the other hand, in the intermediate assembly 17a, the large-diameter portion 18 of each of the rivets 9 and 9 is fitted in the through hole 12 of the one retainer element 8. For this reason, the nitride layer is not formed on the inner peripheral surface portion of the large-diameter portion 18 and the through-hole 12 of the one retainer element 8 in contact with the large-diameter portion 18. When the inner side surface (the lower surface in FIG. 11) of the head portion 15 of the rivets 9 and 9 and the outer surface (the upper surface in FIG. 11) of the one retainer element 8 are brought into contact with each other, In addition, no nitride layer is formed. On the other hand, when a gap is provided between the inner surface of the head portion 15 of the rivets 9 and 9 and the outer surface of the one cage element 8 in the state of the intermediate assembly 17a, the rivet Nitride layers are also formed in portions where the inner side surfaces of the head portions 15 of 9, 9 and the outer side surfaces of the one cage element 8 face each other.
又、上述の様な先発明の場合、図１１（ｂ）に示す様に、前記中間組立体１７ａの平板部１１と他方の保持器素子８の平板部１１とを重ね合わせた状態で、これら両保持器素子１７ａ、８の曲板部１０、１０の内面同士の間に前記各玉６（図７参照）を挟み込む。そして、この状態で、前記各リベット９、９の先端部をかしめる事により、これら両保持器素子８、８同士を結合固定する。
この様なかしめ作業の際、前記各リベット９、９の杆部１３は、その先端部側から軸方向への押圧力を受ける為、この杆部１３は、前記両保持器素子８、８の貫通孔１２、１２の内側で、膨張する様に塑性変形する。
In the case of the prior invention as described above, as shown in FIG. 11B, the flat plate portion 11 of the intermediate assembly 17a and the flat plate portion 11 of the other cage element 8 are overlapped. The balls 6 (see FIG. 7) are sandwiched between the inner surfaces of the curved plate portions 10 and 10 of the cage elements 17a and 8. In this state, the retainer elements 8 and 8 are coupled and fixed to each other by caulking the tips of the rivets 9 and 9.
In such a caulking operation, the flange portion 13 of each of the rivets 9 and 9 receives a pressing force in the axial direction from the tip end side thereof, so that the flange portion 13 is connected to the cage elements 8 and 8. Plastic deformation occurs so as to expand inside the through holes 12 and 12.
ところが、前記一方の保持器素子８の貫通孔１２の内周面、及び、前記各リベット９、９の大径部１８は、窒化層が形成されていない為、当該部分の強度が、他の部分よりも低い。この為、前記大径部１８は、他の部分よりも大きく膨張しようとする事が、発明者の実験により分かった。この結果、この様な大径部１８の膨張に基づいて、この大径部１８の外径側に存在する前記一方の保持器素子８の貫通孔１２の内周面が強く押圧されて、当該部分にひびや亀裂等が発生する可能性がある事も分かった。 However, since the inner peripheral surface of the through-hole 12 of the one cage element 8 and the large-diameter portion 18 of each of the rivets 9 and 9 are not formed with a nitride layer, the strength of the portion is other than Lower than part. For this reason, it has been found by the inventor's experiment that the large-diameter portion 18 tends to expand larger than other portions. As a result, based on the expansion of the large diameter portion 18, the inner peripheral surface of the through-hole 12 of the one retainer element 8 existing on the outer diameter side of the large diameter portion 18 is strongly pressed, It was also found that cracks and cracks could occur in the part.
本発明は、上述の様な事情に鑑みて、一方の保持器素子に複数のリベットを組み付けた中間組立体の状態で窒化処理を施した場合でも、この一方の保持器素子の貫通孔の内周面及びこれら各リベットの大径部の一部に窒化層を形成できて、耐久性に優れた波形保持器を得られる、波形保持器の製造方法及び波形保持器の構造を実現すべく発明したものである。 In view of the circumstances as described above, the present invention is effective even when nitriding is performed in the state of an intermediate assembly in which a plurality of rivets are assembled to one cage element. An invention for realizing a corrugated retainer manufacturing method and a corrugated retainer structure capable of forming a nitrided layer on the peripheral surface and a part of the large diameter portion of each of these rivets and obtaining a corrugated retainer excellent in durability. It is a thing.
本発明の対象となる波形保持器は、１対の保持器素子と、複数のリベットとを備えている。
このうちの両保持器素子はそれぞれ、窒化処理可能な金属板により全体を波形の円環状に造られて、円周方向複数箇所に半円筒状の曲板部を、円周方向に隣り合う曲板部同士の間に平板部を、これら各平板部の一部に貫通孔を、それぞれ備えている。
又、前記各リベットはそれぞれ、窒化処理可能な金属製で、杆部と、この杆部の基端部に設けられた、この杆部よりも大径の頭部とを備えている。
そして、前記両保持器素子の各平板部の内側面同士を互いに突き合わせると共に、互いに突き合わせたこれら各平板部の貫通孔に前記各リベットの杆部を挿通した状態で、これら各杆部の先端部を押し潰して、これら各杆部よりも大径のかしめ部を形成し、互いに突き合わせた前記各平板部同士を前記各リベットの頭部とかしめ部とで挟持する事により接合して、前記各曲板部に囲まれた部分を、それぞれ玉を転動自在に保持する為のポケットとしている。
The waveform holder that is the subject of the present invention comprises a pair of holder elements and a plurality of rivets.
Both of these cage elements are each made of a metal plate capable of nitriding to have a corrugated annular shape as a whole. A flat plate portion is provided between the plate portions, and a through hole is provided in a part of each flat plate portion.
Each of the rivets is made of a metal capable of nitriding treatment, and includes a flange portion and a head portion having a diameter larger than that of the flange portion provided at a base end portion of the flange portion.
The inner surfaces of the flat plate portions of the two retainer elements are butted against each other, and the tips of the rib portions are inserted into the through holes of the flat plate portions that are butted against each other. Crushing the part, forming a caulking part having a diameter larger than each of these flanges, joining the flat plate parts butted together by sandwiching the head part and the caulking part of each rivet, The part surrounded by each curved plate part is a pocket for holding the ball so that it can roll freely.
特に、本発明のうち、請求項１に記載した波形保持器の製造方法の場合、前記かしめ部を形成する以前の状態で、前記各リベットの杆部の、前記頭部寄り部分に、円柱状の大径部を設けている。
又、前記両保持器素子のうち、一方の保持器素子の各貫通孔の内周面の一部に、前記各リベットの大径部と締め代を有する状態で嵌合可能な嵌合部を設けている。又、前記各貫通孔の内周面の残部に、これら各貫通孔の嵌合部に前記各リベットの大径部を圧入した状態で、この残部とこれら各リベットの大径部の外周面との間に隙間が形成される非嵌合部を設けている。
そして、前記各リベットの大径部を、前記一方の保持器素子の各貫通孔の嵌合部に圧入する事により、中間組立体を構成した状態で、この中間組立体に対して窒化処理を施すと共に、前記両保持器素子のうちの他方の保持器素子に対して、単体のまま窒化処理を施す。
その後、前記中間組立体を構成する各リベットの杆部のうちの前記一方の保持器素子の各通孔から突出した部分を前記他方の保持器素子の各貫通孔に挿通すると共に前記両保持器素子の平板部同士を重ね合わせる。更に必要に応じて、これと同時に、これら両保持器素子の曲板部の内面同士の間に前記各玉を挟み込む。そして、この状態で、前記杆部の先端部に前記かしめ部を形成する。
In particular, in the case of the method for manufacturing a corrugated cage according to claim 1 of the present invention, a columnar shape is formed on the head portion of each rivet in the state before the caulking portion is formed. The large diameter part is provided.
In addition, a fitting portion that can be fitted with a large diameter portion of each of the rivets and a tightening margin is formed on a part of the inner peripheral surface of each through hole of one of the cage elements. Provided. In addition, in the state where the large diameter portion of each rivet is press-fitted into the fitting portion of each through hole, the remaining portion and the outer peripheral surface of the large diameter portion of each rivet A non-fitting portion in which a gap is formed is provided.
Then, the intermediate assembly is subjected to nitriding treatment in a state where the intermediate assembly is configured by press-fitting the large-diameter portion of each rivet into the fitting portion of each through hole of the one retainer element. In addition, nitriding treatment is performed on the other of the two cage elements as it is.
Thereafter, a portion protruding from each through-hole of the one retainer element among the flange portions of each rivet constituting the intermediate assembly is inserted into each through-hole of the other retainer element and the both retainers The flat plate portions of the element are overlapped. Further, if necessary, the balls are sandwiched between the inner surfaces of the curved plate portions of both the cage elements. In this state, the caulking portion is formed at the distal end portion of the flange portion.
尚、一般的な波形保持器を構成する各ポケットの両端の開口幅は、それぞれこれら各ポケット内に保持すべき玉の直径よりも小さくなっている。この為、この様な一般的な波形保持器の場合には、完成後の状態で、前記各ポケット内に前記各玉を組み込む事はできない。従って、この様な一般的な波形保持器を対象として、上述した本発明の製造方法を実施する場合には、上述の様に、かしめ部を形成する前に１対の保持器素子の曲板部の内面同士の間に各玉を挟み込んでおく必要がある。
これに対し、特殊な例であるが、完成後の状態で、各ポケットの両端の開口幅のうち、一方の開口幅のみが、これら各ポケット内に保持すべき玉の直径よりも小さくなっており、他方の開口幅が、これら各玉の直径よりも大きくなっている波形保持器を対象として、上述した本発明の製造方法を実施する場合には、必ずしも、かしめ部を形成する前に１対の保持器素子の曲板部の内面同士の間に各玉を挟み込んでおく必要はない。
Note that the opening widths at both ends of each pocket constituting a general corrugated holder are smaller than the diameter of the ball to be held in each pocket. For this reason, in the case of such a general waveform holder, the balls cannot be incorporated into the pockets in a completed state. Accordingly, when the above-described manufacturing method of the present invention is implemented for such a general waveform holder, as described above, a curved plate of a pair of cage elements is formed before the caulking portion is formed. It is necessary to sandwich each ball between the inner surfaces of the parts.
On the other hand, although it is a special example, after completion, only one of the opening widths at both ends of each pocket is smaller than the diameter of the ball to be held in each pocket. When the above-described manufacturing method of the present invention is applied to the corrugated cage whose other opening width is larger than the diameter of each of these balls, it is not necessarily necessary to form the caulking portion before forming the caulking portion. It is not necessary to sandwich each ball between the inner surfaces of the curved plate portions of the pair of cage elements.
又、本発明のうち、請求項２に記載した波形保持器は、前記かしめ部を形成する以前の状態のこれら各リベットが、前記杆部の頭部寄り部分に、円筒状の大径部を有している。
又、前記両保持器素子のうちの一方の保持器素子の各貫通孔の内周面の一部に、前記各リベットの大径部と締め代を有する状態で嵌合可能な嵌合部を設けている。又、前記各貫通孔の内周面の残部に、前記各リベットの大径部を前記嵌合部に圧入した状態で、この残部と、この大径部の外周面との間に隙間が形成される非嵌合部を設けている。
又、前記各リベットと前記一方の保持器素子とは、前記各リベットの大径部をこの一方の保持器素子の各貫通孔の嵌合部に圧入する事により、前記各リベットをこの一方の保持器素子に仮止めして成る中間組立体を構成した状態で窒化処理を施される事により、前記各リベット及び前記一方の保持器素子の表面のうち、前記中間組立体の状態でこれら両部材同士が当接していない部分に、窒化層が形成されたものである。
一方、前記両保持器素子のうちの他方の保持器素子は、単体で窒化処理を施される事により、この他方の保持器素子の全表面に窒化層が形成されたものである。
Further, in the present invention, the corrugated cage described in claim 2 is such that each of these rivets in a state before the caulking portion is formed has a cylindrical large-diameter portion near the head portion of the flange portion. Have.
Further, a fitting portion that can be fitted in a state having a tightening margin with a large diameter portion of each rivet is formed on a part of the inner peripheral surface of each through hole of one of the cage elements. Provided. In addition, a gap is formed between the remaining portion and the outer peripheral surface of the large diameter portion in a state where the large diameter portion of each rivet is press-fitted into the fitting portion in the remaining portion of the inner peripheral surface of each through hole. A non-fitting portion is provided.
The rivets and the one retainer element are formed by press-fitting the large-diameter portion of each rivet into the fitting portion of each through-hole of the one retainer element. By performing nitriding in a state in which the intermediate assembly formed by temporarily fixing to the cage element is formed, the surface of each of the rivets and one of the cage elements is in the state of the intermediate assembly. A nitride layer is formed in a portion where the members are not in contact with each other.
On the other hand, the other retainer element of the both retainer elements is formed by nitriding alone to form a nitride layer on the entire surface of the other retainer element.
上述の様に構成する本発明によれば、一方の保持器素子に複数個のリベットを組み付けた中間組立体の状態で窒化処理を施した場合でも、この一方の保持器素子の各貫通孔の内周面及び前記各リベットの大径部の一部に窒化層を形成できて、耐久性に優れた波形保持器を得られる。
即ち、本発明の場合、前記リベットの杆部に大径部を設けると共に、前記一方の保持器素子の各貫通孔の内周面に、この大径部と締め代を持って嵌合可能な嵌合部と、この大径部の外周面との間に隙間を設ける事ができる非嵌合部とを設けている。この為、前記一方の保持器素子の各貫通孔の嵌合部に、前記リベットの大径部を嵌合する事により構成した中間組立体の状態で、これら各貫通孔の非嵌合部と、これら各リベットの大径部の外周面との間に隙間を設ける事ができる。この結果、この様な中間組立体の状態で窒化処理を施した場合でも、前記非嵌合部、及び、この非嵌合部と対向する前記大径部の外周面に、窒化層を形成できる。従って、前記一方の保持器素子の各貫通孔の内周面、及び、前記各リベットの大径部の外周面の強度を確保して、保持器の耐久性を確保できる。
又、本発明の場合、前記一方の保持器素子の各貫通孔の内周面、及び、前記各リベットの大径部の一部に、窒化層を形成している。この為、当該部分の強度が、他の部分よりも著しく低くなる事がない。この結果、前記各リベットの先端部をかしめる際、前記大径部が、他の部分よりも大きく膨張する事を防止して、この大径部の外径側に存在する前記各貫通孔の内周面にひびや亀裂等が発生する事を防止できる。
According to the present invention configured as described above, even when nitriding is performed in the state of an intermediate assembly in which a plurality of rivets are assembled to one cage element, each through hole of the one cage element is formed. A nitride layer can be formed on the inner peripheral surface and a part of the large diameter portion of each rivet, and a corrugated cage having excellent durability can be obtained.
That is, in the case of the present invention, a large-diameter portion is provided in the flange portion of the rivet, and the large-diameter portion can be fitted to the inner peripheral surface of each through hole of the one retainer element with a tightening margin. A non-fitting portion that can provide a gap between the fitting portion and the outer peripheral surface of the large-diameter portion is provided. For this reason, in the state of the intermediate assembly constituted by fitting the large diameter portion of the rivet to the fitting portion of each through hole of the one cage element, A gap can be provided between the outer peripheral surface of the large-diameter portion of each rivet. As a result, even when nitriding is performed in the state of such an intermediate assembly, a nitride layer can be formed on the outer surface of the non-fitting portion and the large-diameter portion facing the non-fitting portion. . Therefore, the durability of the cage can be ensured by securing the strength of the inner circumferential surface of each through-hole of the one cage element and the outer circumferential surface of the large-diameter portion of each rivet.
In the present invention, a nitride layer is formed on the inner peripheral surface of each through hole of the one cage element and a part of the large diameter portion of each rivet. For this reason, the intensity | strength of the said part does not become remarkably lower than another part. As a result, when caulking the tip of each rivet, the large-diameter portion is prevented from expanding more than other portions, and the through-holes existing on the outer diameter side of the large-diameter portion are prevented. It is possible to prevent the inner peripheral surface from being cracked or cracked.
［実施の形態の第１例］
図１は、本発明の実施の形態の第１例を示している。尚、本例の特徴は、保持器を構成する１対の保持器素子８、８のうちの、一方（図８、１０の上方）の保持器素子８の各貫通孔１２ａの形状、及び、各リベット９の形状を工夫した点にある。この特徴部分以外の製造方法及び構造は、前述した先発明の波形保持器の製造方法及びその構造、或いは、従来から知られている波形保持器の製造方法及び構造とほぼ同様であるから、先発明或いは従来構造と同様に構成する部分に就いては説明を簡略にし、以下、本例の特徴部分を中心に説明する。
尚、本例の対象となる、一般的な波形保持器とは、前述した様に、完成状態で、各ポケットの両端の開口幅が、それぞれこれら各ポケット内に保持すべき玉の直径よりも小さくなっているものを言う。
[First example of embodiment]
FIG. 1 shows a first example of an embodiment of the present invention. The feature of this example is that the shape of each through-hole 12a of one of the cage elements 8 (upward in FIGS. 8 and 10) of the pair of cage elements 8 and 8 constituting the cage, and The shape of each rivet 9 is devised. The manufacturing method and structure other than this characteristic part are substantially the same as the manufacturing method and structure of the waveform holder of the prior invention described above, or the manufacturing method and structure of the waveform holder conventionally known. The description of the parts that are the same as those of the invention or the conventional structure will be simplified, and the characteristic parts of this example will be mainly described below.
In addition, as described above, the general waveform holder that is the object of this example is that the opening width of both ends of each pocket is larger than the diameter of the ball to be held in each pocket as described above. Say what is getting smaller.
本例の波形保持器は、図７〜９に示した従来構造の波形保持器７と同様に、１対の保持器素子８、８（図８参照）と、これら両保持器素子同士を接合する為の複数本のリベット９、９とから成る。 The waveform holder of this example is similar to the waveform holder 7 having the conventional structure shown in FIGS. 7 to 9, and a pair of cage elements 8 and 8 (see FIG. 8) are joined to each other. It consists of a plurality of rivets 9, 9 for the purpose.
又、前記両保持器素子８、８は、鋼板、ステンレス鋼板等の金属板製の素材に、プレスによる打ち抜き加工及び曲げ加工を施す事により、全体を波形の円環状に造られている。この様な両保持器素子８、８は、円周方向複数箇所に部分球面状の曲板部１０、１０を、円周方向に隣り合う曲板部１０、１０同士の間に平板部１１、１１を、これら各平板部１１、１１の周方向中央部に貫通孔１２ａを、それぞれ備える。又、前記各リベット９、９は、鋼、ステンレス鋼等の金属製で、杆部１３と、この杆部１３の基端部に設けられた頭部１５とを備える。 The retainer elements 8 and 8 are formed into a corrugated annular shape as a whole by punching and bending a metal plate material such as a steel plate and a stainless steel plate. Both of these cage elements 8, 8 include a plurality of circumferentially curved curved plate portions 10, 10 at a plurality of locations in the circumferential direction, and a flat plate portion 11, between the curved plate portions 10, 10 adjacent in the circumferential direction, 11 is provided with a through hole 12a in the central portion in the circumferential direction of each of the flat plate portions 11 and 11, respectively. Each of the rivets 9 and 9 is made of a metal such as steel or stainless steel, and includes a flange portion 13 and a head portion 15 provided at a base end portion of the flange portion 13.
特に本例の波形保持器の場合、前記両保持器素子８、８のうちの、一方の保持器素子８の各平板部１１に形成した各貫通孔１２ａを、図１に示す様な、この保持器素子８の径方向に長い楕円形状としている。又、前記各貫通孔１２ａの短軸の長さ寸法ｄ１は、前記各リベット９の杆部１３の大径部１８の外径寸法Ｄ１８よりも僅かに小さくしている（ｄ１＜Ｄ１８）。本例の場合、前記各貫通孔１２ａの内周面のうち、前記短軸と交わる部分を中心に、円周方向両側に所定角度（約１５度程度）ずつずれた範囲により構成される円弧状部分を、前記大径部１８と締め代を有する状態で嵌合可能な嵌合部１９、１９としている。 Particularly, in the case of the waveform holder of this example, each through hole 12a formed in each flat plate portion 11 of one of the cage elements 8 and 8 is shown in FIG. The cage element 8 has an elliptical shape that is long in the radial direction. Further, the length d 1 of the minor axis of each through hole 12a, the outer diameter is slightly smaller than the D 18 (d 1 <D of the large diameter portion 18 of the rod portion 13 of each rivet 9 18 ). In the case of this example, an arc shape constituted by a range shifted by a predetermined angle (about 15 degrees) on both sides in the circumferential direction around the portion intersecting the minor axis of the inner peripheral surface of each through hole 12a. The part is made into the fitting parts 19 and 19 which can be fitted with the large diameter part 18 in a state having a tightening allowance.
又、これら各貫通孔１２ａの長軸の長さ寸法ｄ２は、前記各リベット９の杆部１３の大径部１８の外径寸法Ｄ１８よりも大きい（ｄ２＞Ｄ１８）。本例の場合、前記各貫通孔１２ａの内周面のうちの前記各嵌合部１９、１９以外の残部を、その内径寸法が、前記各リベット９の大径部１８の外径寸法Ｄ１８よりも大きい、非嵌合部２０、２０としている。即ち、前記各貫通孔１２ａの各嵌合部１９、１９に前記各リベット９の大径部１８を圧入した状態で、前記各非嵌合部２０、２０と、前記各リベット９の大径部１８の外周面との間に隙間２１、２１が形成される。
尚、本例の場合、前記両保持器素子８、８のうちの他方（図８、１０の下方）の保持器素子８の各貫通孔１２は、前述した従来構造及び先発明の構造と同様に円形に形成している。
Further, the length d 2 of the long axis of the respective through holes 12a, the larger than the outer diameter D 18 of the large diameter portion 18 of the rod portion 13 of each rivet 9 (d 2> D 18) . In the case of this example, the inner diameter of the remaining part of the inner peripheral surface of each through hole 12a other than the fitting parts 19 and 19 is the outer diameter D 18 of the large diameter part 18 of each rivet 9. The non-fitting portions 20 and 20 are larger. That is, in a state where the large-diameter portion 18 of each rivet 9 is press-fitted into each fitting portion 19, 19 of each through-hole 12 a, each non-fitting portion 20, 20 and the large-diameter portion of each rivet 9 Clearances 21 and 21 are formed between the outer peripheral surfaces of 18.
In the case of this example, each through-hole 12 of the cage element 8 on the other side (lower side of FIGS. 8 and 10) of the cage elements 8 and 8 is the same as the conventional structure and the structure of the previous invention. It is formed in a circle.
次に、以上の様な構成を有する本例の波形保持器の製造方法に就いて、図１及び図１１を参照しつつ説明する。
先ず、前述した先発明と同様に、図１１（ａ）に示した中間組立体１７ａを組み立てる。具体的には、前記両保持器素子８、８のうち、一方の保持器素子８の外側（図１１の上側）に前記各リベット９の頭部１５を配置すると共に、前記大径部１８を、前記各貫通孔１２ａの各嵌合部１９、１９に内嵌する。この状態で、これら各貫通孔１２ａの各非嵌合部２０、２０と、前記各リベット９の大径部１８の外周面との間には、前記各隙間２１、２１が形成されている。
次いで、上述の様に構成される中間組立体１７ａに対して窒化処理を施す。一方、前記両保持器素子８、８のうち、他方の保持器素子８には、単体の状態で窒化処理を施す。
Next, the manufacturing method of the waveform holder of the present example having the above-described configuration will be described with reference to FIGS.
First, as in the above-described prior invention, the intermediate assembly 17a shown in FIG. Specifically, the head 15 of each rivet 9 is arranged outside one of the cage elements 8, 8 (upper side in FIG. 11), and the large-diameter portion 18 is The fitting parts 19 and 19 of the through holes 12a are fitted inside. In this state, the gaps 21 and 21 are formed between the non-fitting portions 20 and 20 of the through holes 12a and the outer peripheral surface of the large-diameter portion 18 of the rivets 9, respectively.
Next, nitriding treatment is performed on the intermediate assembly 17a configured as described above. On the other hand, of the two cage elements 8 and 8, the other cage element 8 is subjected to nitriding in a single state.
この様な本例の場合、前記他方の保持器素子８は、その周面の全体に窒化層が形成されている。一方、前記中間組立体１７ａは、前記各貫通孔１２ａの各嵌合部１９、１９と、前記各リベット９の大径部１８の周方向一部とが嵌合している為、当該部分には、窒化層が形成されていない。又、前記各貫通孔１２ａの各非嵌合部２０、２０とこれら各リベット９の大径部１８の外周面との間には、前記各隙間２１、２１が形成されている為、当該部分には、窒化層が形成されている。
次いで、図１１（ｂ）に示す様に、前記中間組立体１７ａの平板部１１と他方の保持器素子８の平板部１１とを重ね合わせた状態で、これら両保持器素子１７ｂ、８の曲板部１０、１０の内面同士の間に各玉６（図７参照）を挟み込む。そして、この状態で、前記各リベット９、９の先端部をかしめる事により、これら両保持器素子８、８同士を結合固定する。尚、この様なかしめ作業の際、前記各リベット９、９は、軸方向の押圧力を受けて、前記両保持器素子８、８の各貫通孔１２ａ、１２の内側で、径方向外方に膨張する様に塑性変形する。この様に前記各リベット９、９が塑性変形する事により、前記各隙間２１、２１を含む、これら各リベット９、９の外周面と前記各貫通孔１２ａ、１２の内周面との間に存在する隙間が消失する。この結果、前記両保持器素子８、８と前記各リベット９、９とは、がたつく事なく固定される。
In the case of this example, the other cage element 8 has a nitride layer formed on the entire peripheral surface thereof. On the other hand, the intermediate assembly 17a is fitted with the fitting portions 19 and 19 of the through holes 12a and a part of the circumferential direction of the large diameter portion 18 of the rivets 9. The nitride layer is not formed. Further, since the gaps 21 and 21 are formed between the non-fitting portions 20 and 20 of the through holes 12a and the outer peripheral surface of the large diameter portion 18 of the rivets 9, A nitride layer is formed.
Next, as shown in FIG. 11 (b), in a state in which the flat plate portion 11 of the intermediate assembly 17a and the flat plate portion 11 of the other cage element 8 are overlapped, the bending of both the cage elements 17b and 8 is performed. Each ball 6 (see FIG. 7) is sandwiched between the inner surfaces of the plate portions 10 and 10. In this state, the retainer elements 8 and 8 are coupled and fixed to each other by caulking the tips of the rivets 9 and 9. In such a caulking operation, each of the rivets 9 and 9 receives an axial pressing force, and radially outwards inside the through holes 12a and 12 of the both cage elements 8 and 8. Plastically deformed to expand. In this way, the rivets 9 and 9 are plastically deformed, so that the gaps 21 and 21 are included between the outer peripheral surfaces of the rivets 9 and 9 and the inner peripheral surfaces of the through holes 12a and 12. Existing gaps disappear. As a result, the cage elements 8 and 8 and the rivets 9 and 9 are fixed without rattling.
上述の様な本例によれば、前記一方の保持器素子８に前記各リベット９を組み付けた状態（中間組立体１７ａの状態）で窒化処理を施した場合でも、前記一方の保持器素子８の各貫通孔１２ａの内周面及び前記各リベット９の大径部１８の一部に窒化層を形成して、耐久性に優れた構造を実現できる。
即ち、本例の場合、前記各リベット９に大径部１８を設けると共に、前記一方の保持器素子８の各貫通孔１２ａの内周面に、前記各嵌合部１９、１９と前記各非嵌合部２０、２０とを設けている。この為、これら各嵌合部１９、１９に、前記各リベット９の大径部１８を嵌合する事により構成した前記中間組立体１７ａの状態で、前記各非嵌合部２０、２０と、これら各リベット９の大径部１８の外周面との間に前記各隙間２１、２１を設ける事ができる。この結果、前記中間組立体１７ａの状態で、窒化処理を施した場合でも、前記各非嵌合部２０、２０、及び、これら各非嵌合部２０、２０と対向する前記大径部１８の外周面に、窒化層を形成できる。従って、前記一方の保持器素子８の各貫通孔１２ａの内周面、及び、前記各リベット９の大径部１８の外周面の強度を確保して、保持器の耐久性を確保できる。
According to this example as described above, even when nitriding is performed in a state where the rivets 9 are assembled to the one retainer element 8 (the state of the intermediate assembly 17a), the one retainer element 8 By forming a nitride layer on the inner peripheral surface of each through hole 12a and a part of the large diameter portion 18 of each rivet 9, a structure having excellent durability can be realized.
That is, in the case of this example, each rivet 9 is provided with a large-diameter portion 18, and each fitting portion 19, 19 and each non-removal portion are formed on the inner peripheral surface of each through-hole 12 a of the one cage element 8. The fitting parts 20 and 20 are provided. For this reason, in the state of the intermediate assembly 17a configured by fitting the large-diameter portion 18 of the rivet 9 to the fitting portions 19, 19, the non-fitting portions 20, 20 The gaps 21 and 21 can be provided between the outer peripheral surfaces of the large-diameter portions 18 of the rivets 9. As a result, even when nitriding is performed in the state of the intermediate assembly 17a, the non-fitting parts 20, 20 and the large-diameter part 18 facing the non-fitting parts 20, 20 A nitride layer can be formed on the outer peripheral surface. Therefore, the strength of the inner peripheral surface of each through-hole 12a of the one retainer element 8 and the outer peripheral surface of the large-diameter portion 18 of each rivet 9 can be ensured to ensure the durability of the retainer.
又、本例の場合、前記一方の保持器素子８の各貫通孔１２ａの内周面、及び、前記各リベット９の大径部１８の一部に、窒化層を形成している。この為、当該部分の強度が、他の部分よりも著しく低くなる事がない。この結果、前記各リベット９の先端部をかしめる際、前記大径部１８が、他の部分よりも大きく膨張する事を防止して、この大径部１８の外径側に存在する前記各貫通孔１２ａの内周面にひびや亀裂等が発生する事を防止できる。 In the case of this example, a nitride layer is formed on the inner peripheral surface of each through hole 12a of the one retainer element 8 and a part of the large diameter portion 18 of each rivet 9. For this reason, the intensity | strength of the said part does not become remarkably lower than another part. As a result, when the tip of each rivet 9 is caulked, the large-diameter portion 18 is prevented from expanding more than other portions, and each of the large-diameter portions 18 existing on the outer diameter side is prevented. It is possible to prevent cracks and cracks from occurring on the inner peripheral surface of the through hole 12a.
［実施の形態の第２例］
図２は、本発明の実施の形態の第２例を示している。本例の場合、保持器を構成する両保持器素子８、８（図８参照）のうち、一方の保持器素子８の貫通孔１２ｂの形状を、この保持器素子８の周方向に長い楕円形状としている。言い換えれば、本願発明の場合、一方の保持器素子８の貫通孔１２ｂの形状を、前述した実施の形態の第１例の貫通孔１２ａを、９０度回転させた如き形状としている。その他の部分の構成及び作用・効果に就いては、前述した実施の形態の第１例の場合とほぼ同様である。
[Second Example of Embodiment]
FIG. 2 shows a second example of the embodiment of the present invention. In the case of this example, the shape of the through hole 12b of one of the cage elements 8 out of the two cage elements 8 and 8 (see FIG. 8) constituting the cage is an ellipse that is long in the circumferential direction of the cage element 8. It has a shape. In other words, in the case of the present invention, the shape of the through hole 12b of one cage element 8 is such that the through hole 12a of the first example of the above-described embodiment is rotated 90 degrees. About the structure of another part, an effect | action, and an effect, it is substantially the same as that of the case of the 1st example of embodiment mentioned above.
［実施の形態の第３例］
図３は、本発明の実施の形態の第３例を示している。本例の場合、保持器を構成する両保持器素子８、８（図８参照）のうち、一方の保持器素子８の貫通孔１２ｃの形状を、四隅に隅Ｒ部を形成した略正方形状としている。
この様な本例の場合、各貫通孔１２ｃを構成する内側面のうち、径方向（図３の上下方向）に対向する内側面同士の距離Ｈ１、及び、円周方向（図３の左右方向）に対向する内側面同士の距離Ｈ２を各リベット９の杆部１３の大径部１８の外径寸法Ｄ１８よりも僅かに小さくしている（Ｈ１＜Ｄ１８、Ｈ２＜Ｄ１８）。そして、本例の場合、前記各貫通孔１２ｃの各内側面の中央部を、前記大径部１８と締め代を有する状態で嵌合可能な嵌合部１９ａ、１９ａとしている。
一方、前記各貫通孔１２ｃの内側面のうちの前記各嵌合部１９ａ、１９ａ以外の残部を、非嵌合部２０ａ、２０ａとしている。即ち、前記各貫通孔１２ｃの嵌合部１９ａ、１９ａに前記各リベット９の大径部１８を圧入した状態で、前記各非嵌合部２０ａ、２０ａと、前記各リベット９の大径部１８の外周面との間に隙間２１ａ、２１ａが形成されている。その他の部分の構成及び作用・効果に就いては、前述した実施の形態の第１例の場合とほぼ同様である。
[Third example of embodiment]
FIG. 3 shows a third example of the embodiment of the present invention. In the case of this example, among the two cage elements 8 and 8 (see FIG. 8) constituting the cage, the shape of the through hole 12c of one cage element 8 is a substantially square shape in which corner R portions are formed at the four corners. It is said.
In the case of this example, among the inner surfaces constituting each through-hole 12c, the distance H 1 between the inner surfaces facing in the radial direction (vertical direction in FIG. 3) and the circumferential direction (left and right in FIG. 3) It is slightly smaller than the outer diameter D 18 of the distance of H 2 inner surfaces facing each other in the direction) the large-diameter portion 18 of the rod portion 13 of each rivet 9 (H 1 <D 18, H 2 <D 18 ). And in the case of this example, the center part of each inner surface of each said through-hole 12c is made into the fitting parts 19a and 19a which can be fitted in the state which has the interference diameter with the said large diameter part 18. FIG.
On the other hand, the remaining portions other than the respective fitting portions 19a and 19a on the inner side surfaces of the respective through holes 12c are set as non-fitting portions 20a and 20a. That is, in a state in which the large-diameter portion 18 of each rivet 9 is press-fitted into the fitting portions 19a and 19a of each through-hole 12c, the non-fitting portions 20a and 20a and the large-diameter portion 18 of each rivet 9 are pressed. Clearances 21a and 21a are formed between the outer peripheral surfaces of the two. About the structure of another part, an effect | action, and an effect, it is substantially the same as that of the case of the 1st example of embodiment mentioned above.
［実施の形態の第４例］
図４は、本発明の実施の形態の第４例を示している。本例の場合、保持器を構成する両保持器素子８、８（図８参照）のうち、一方の保持器素子８の貫通孔１２ｄの形状を、四隅に隅Ｒ部を形成した略菱形状としている。言い換えれば、本例の場合、一方の保持器素子８の貫通孔１２ｄの形状を、前述した実施の形態の第３例の貫通孔１２ｃを、４５度回転させた如き形状としている。その他の部分の構成及び作用・効果に就いては、前述した実施の形態の第１例の場合とほぼ同様である。
[Fourth Example of Embodiment]
FIG. 4 shows a fourth example of the embodiment of the present invention. In the case of this example, among the two cage elements 8 and 8 (see FIG. 8) constituting the cage, the shape of the through-hole 12d of one cage element 8 is substantially rhomboid with corner R portions formed at the four corners. It is said. In other words, in the case of this example, the shape of the through hole 12d of one cage element 8 is such that the through hole 12c of the third example of the above-described embodiment is rotated by 45 degrees. About the structure of another part, an effect | action, and an effect, it is substantially the same as that of the case of the 1st example of embodiment mentioned above.
［実施の形態の第５例］
図５は、本発明の実施の形態の第５例を示している。本例の場合、保持器を構成する両保持器素子８、８（図８参照）のうち、一方の保持器素子８の貫通孔１２ｅの形状を、六角形状としている。
この様な本例の場合、各貫通孔１２ｅを構成する内側面のうち、対向する各内側面同士の距離Ｈ３を、各リベット９の杆部１３の大径部１８の外径寸法Ｄ１８よりも僅かに小さくしている（Ｈ３＜Ｄ１８）。そして、本例の場合、前記各貫通孔１２ｃの各内側面の中央部を、前記大径部１８と締め代を有する状態で嵌合可能な嵌合部１９ｂ、１９ｂとしている。
一方、前記各貫通孔１２ｅの内側面のうちの前記各嵌合部１９ｂ、１９ｂ以外の残部を、非嵌合部２０ｂ、２０ｂとしている。即ち、前記各貫通孔１２ｅの嵌合部１９ａ、１９ａに前記各リベット９の大径部１８を圧入した状態で、前記各非嵌合部２０ｂ、２０ｂと、前記各リベット９の大径部１８の外周面との間に隙間２１ｂ、２１ｂが形成されている。その他の部分の構成及び作用・効果に就いては、前述した実施の形態の第１例の場合とほぼ同様である。
[Fifth Example of Embodiment]
FIG. 5 shows a fifth example of the embodiment of the present invention. In the case of this example, the shape of the through-hole 12e of one retainer element 8 among the retainer elements 8 and 8 (see FIG. 8) constituting the retainer is a hexagonal shape.
Case of this example, among the inner surfaces forming the through hole 12e, the distance H 3 of inner surfaces facing each other, the outer diameter D 18 of the large diameter portion 18 of the rod portion 13 of each rivet 9 (H 3 <D 18 ). In the case of this example, the center portion of each inner side surface of each through hole 12c is a fitting portion 19b, 19b that can be fitted with the large diameter portion 18 in a state of having a tightening allowance.
On the other hand, the remaining portions other than the fitting portions 19b and 19b on the inner side surface of the through holes 12e are non-fitting portions 20b and 20b. That is, in a state in which the large-diameter portion 18 of each rivet 9 is press-fitted into the fitting portions 19a and 19a of each through-hole 12e, each non-fitting portion 20b and 20b and the large-diameter portion 18 of each rivet 9 are pressed. Clearances 21b and 21b are formed between the outer peripheral surfaces of the two. About the structure of another part, an effect | action, and an effect, it is substantially the same as that of the case of the 1st example of embodiment mentioned above.
［実施の形態の第６例］
図６は、本発明の実施の形態の第６例を示している。本例の場合も、保持器を構成する両保持器素子８、８（図８参照）のうち、一方の保持器素子８の貫通孔１２ｆの形状を、六角形状としている。但し、本例の場合、一方の保持器素子８の貫通孔１２ｆの形状を、前述した実施の形態の第５例の貫通孔１２ｅを、６０度回転させた如き形状としている。その他の部分の構成及び作用・効果に就いては、前述した実施の形態の第５例の場合とほぼ同様である。
[Sixth Example of Embodiment]
FIG. 6 shows a sixth example of the embodiment of the present invention. Also in the case of this example, the shape of the through hole 12f of one of the cage elements 8 out of the two cage elements 8 and 8 (see FIG. 8) constituting the cage is a hexagonal shape. However, in the case of this example, the shape of the through hole 12f of one cage element 8 is such that the through hole 12e of the fifth example of the above-described embodiment is rotated by 60 degrees. About the structure of another part, an effect | action, and an effect, it is substantially the same as that of the case of the 5th example of embodiment mentioned above.
本発明を実施する場合に、一方の保持器素子の各貫通孔の形状は、前述の実施の形態の各例の構造に限定されるものではない。即ち、これら各貫通孔の形状は、その内側面の一部に、各リベットの大径部の一部と締め代を持って嵌合可能な嵌合部を有すると共に、前記内側面の残部に、この残部と前記各リベットの大径部の外周面との間に隙間を形成できる非嵌合部を有する、各種形状を採用する事ができる。
又、本発明を実施する場合に、前記各貫通孔の方向、或いは、嵌合部及び非嵌合部を設ける位置等に就いては、使用中に保持器に生じる応力等を考慮して、適宜設定する事ができる。
又、本発明の波形保持器の製造方法及び波形保持器は、前述した一般的な波形保持器に限らず、各ポケットの両端の開口幅のうち、一方の開口幅のみが、これら各ポケット内に保持すべき玉の直径よりも小さくなっており、他方の開口幅が、これら各玉の直径よりも大きくなっている様な構造を含め、各種波形保持器を対象として実施する事ができる。
When practicing the present invention, the shape of each through hole of one cage element is not limited to the structure of each example of the above-described embodiment. That is, the shape of each through hole has a fitting part that can be fitted with a part of the large diameter part of each rivet with a tightening margin on a part of the inner side surface, and on the remaining part of the inner side surface. Various shapes having a non-fitting portion capable of forming a gap between the remaining portion and the outer peripheral surface of the large-diameter portion of each rivet can be employed.
Also, when carrying out the present invention, regarding the direction of each through hole or the position where the fitting part and the non-fitting part are provided, in consideration of the stress etc. generated in the cage during use, It can be set as appropriate.
Further, the corrugated cage manufacturing method and corrugated cage of the present invention are not limited to the general corrugated cage described above, and only one of the opening widths at both ends of each pocket is in the inside of each pocket. The present invention can be implemented for various corrugated cages including a structure in which the diameter of the ball to be held is smaller and the other opening width is larger than the diameter of each ball.
１ 玉軸受
２ 内輪軌道
３ 内輪
４ 外輪軌道
５ 外輪
６ 玉
７ 保持器
８ 保持器素子
９ リベット
１０ 曲板部
１１ 平板部
１２、１２ａ、１２ｂ、１２ｃ、１２ｄ、１２ｅ、１２ｆ 貫通孔
１３ 杆部
１４ かしめ部
１５ 頭部
１６ ポケット
１７、１７ａ 中間組立体
１８ 大径部
１９、１９ａ、１９ｂ 嵌合部
２０、２０ａ、２０ｂ 非嵌合部
２１、２１ａ、２１ｂ 隙間
２２ 窒化層
DESCRIPTION OF SYMBOLS 1 Ball bearing 2 Inner ring raceway 3 Inner ring 4 Outer ring raceway 5 Outer ring 6 Ball 7 Cage 8 Cage element 9 Rivet 10 Curved plate part 11 Flat plate part 12, 12a, 12b, 12c, 12d, 12e, 12f Through-hole 13 ridge part 14 Caulking portion 15 Head 16 Pocket 17, 17a Intermediate assembly 18 Large diameter portion 19, 19a, 19b Fitting portion 20, 20a, 20b Non-fitting portion 21, 21a, 21b Gap 22 Nitride layer
Claims (2)
このうちの両保持器素子はそれぞれ、窒化処理可能な金属板により全体を波形の円環状に造られて、円周方向複数箇所に部分球面状の曲板部を、円周方向に隣り合う曲板部同士の間に平板部を、これら各平板部の一部に貫通孔を、それぞれ備えており、
前記各リベットはそれぞれ、窒化処理可能な金属製で、杆部と、この杆部の基端部に設けられた、この杆部よりも大径の頭部とを備えており、
前記両保持器素子の各平板部の内側面同士を互いに突き合わせると共に、互いに突き合わせたこれら各平板部の貫通孔に前記各リベットの杆部を挿通した状態で、これら各杆部の先端部を押し潰して、これら各杆部よりも大径のかしめ部を形成し、互いに突き合わせた前記各平板部同士を前記各リベットの頭部とかしめ部とで挟持する事により接合して、前記各曲板部に囲まれた部分を、それぞれ玉を転動自在に保持する為のポケットとする波形保持器の製造方法であって、
前記かしめ部を形成する以前の状態の前記各リベットの杆部のうち、前記頭部寄り部分に、円柱状の大径部を設けており、
前記両保持器素子のうち、一方の保持器素子の各貫通孔の内側面の一部に、前記各リベットの大径部と締め代を有する状態で嵌合可能な嵌合部を設けており、前記各貫通孔の内側面の残部に、これら各貫通孔の嵌合部に前記各リベットの大径部を圧入した状態で、この残部とこれら各リベットの大径部の外周面との間に隙間が形成される非嵌合部を設けており、
前記各リベットの大径部を、前記一方の保持器素子の各貫通孔の嵌合部に圧入する事により、中間組立体を構成した状態で、
この中間組立体に対して窒化処理を施すと共に、前記両保持器素子のうちの他方の保持器素子に対して、単体のまま窒化処理を施した後、
前記中間組立体を構成する各リベットの杆部のうちの前記一方の保持器素子の各貫通孔から突出した部分を前記他方の保持器素子の各貫通孔に挿通すると共に前記両保持器素子の平板部同士を重ね合わせた状態で、前記杆部の先端部に前記かしめ部を形成する事を特徴とする波形保持器の製造方法。 A pair of retainer elements and a plurality of rivets;
Both of these cage elements are each made of an undulating metal plate and are formed into a corrugated annular shape, with partial spherical curved plate portions at a plurality of locations in the circumferential direction, adjacent to the circumferential direction. A flat plate portion is provided between the plate portions, and a through hole is provided in a part of each flat plate portion.
Each of the rivets is made of a metal that can be nitrided, and includes a collar portion and a head portion having a diameter larger than that of the collar portion provided at a base end portion of the collar portion,
The inner side surfaces of the flat plate portions of the two retainer elements are butted against each other, and the leading end portions of the rib portions are inserted into the through holes of the flat plate portions butted with the rib portions of the rivets. Crushing to form a caulking portion having a diameter larger than each of the flange portions, and joining the flat plate portions that are butted against each other by sandwiching the head portion and the caulking portion of each rivet, A method of manufacturing a corrugated cage, wherein each of the portions surrounded by the plate portion is a pocket for holding the ball so as to roll freely,
Among the rivet flanges in the state before forming the caulking portion, a cylindrical large diameter portion is provided in the portion near the head,
Among the two retainer elements, a fitting portion is provided on a part of the inner surface of each through hole of one retainer element that can be fitted with a large-diameter portion of each rivet and having a tightening allowance. In the state where the large diameter portion of each rivet is press-fitted into the fitting portion of each through hole in the remaining portion of the inner side surface of each through hole, between the remaining portion and the outer peripheral surface of the large diameter portion of each rivet Is provided with a non-fitting part in which a gap is formed,
In a state where the intermediate assembly is configured by press-fitting the large-diameter portion of each rivet into the fitting portion of each through hole of the one cage element,
Nitriding treatment is performed on the intermediate assembly, and the other cage element of the two cage elements is subjected to nitriding treatment as a single unit,
Of the rivet of each rivet constituting the intermediate assembly, a portion protruding from each through hole of the one retainer element is inserted into each through hole of the other retainer element, and A method of manufacturing a corrugated cage, wherein the caulking portion is formed at a distal end portion of the flange portion in a state where the flat plate portions are overlapped with each other.
このうちの両保持器素子はそれぞれ、窒化処理可能な金属板により全体を波形の円環状に造られて、円周方向複数箇所に半円筒状の曲板部を、円周方向に隣り合う曲板部同士の間に平板部を、これら各平板部の一部に貫通孔を、それぞれ備えており、
前記各リベットはそれぞれ、窒化処理可能な金属製で、杆部と、この杆部の基端部に設けられた、この杆部よりも大径の頭部とを備えており、
前記両保持器素子の各平板部の内側面同士を互いに突き合わせると共に、互いに突き合わせたこれら各平板部の貫通孔に前記各リベットの杆部を挿通した状態で、これら各杆部の先端部を押し潰して、これら各杆部よりも大径のかしめ部を形成し、互いに突き合わせた前記各平板部同士を前記各リベットの頭部とかしめ部とで挟持する事により接合して、前記各曲板部に囲まれた部分を、それぞれ玉を転動自在に保持する為のポケットとした波形保持器であって、
前記かしめ部を形成する以前の状態のこれら各リベットは、前記杆部の頭部寄り部分に、円柱状の大径部を有しており、
前記両保持器素子のうちの一方の保持器素子の各貫通孔の内側面の一部に、前記各リベットの大径部と締め代を有する状態で嵌合可能な嵌合部を設けており、前記各貫通孔の内側面の残部に、前記各リベットの大径部を前記嵌合部に圧入した状態で、この残部と、この大径部の外周面との間に隙間が形成される非嵌合部を設けており、
前記各リベットと前記一方の保持器素子とは、前記各リベットの大径部をこの一方の保持器素子の各貫通孔の嵌合部に圧入して、前記各リベットをこの一方の保持器素子に仮止めして成る中間組立体を構成した状態で窒化処理を施される事により、前記各リベット及び前記一方の保持器素子の表面のうち、前記中間組立体の状態でこれら両部材同士が当接していない部分に、窒化処理層が形成されたものであり、
前記両保持器素子のうちの他方の保持器素子は、単体で窒化処理を施される事により、この他方の保持器素子の全表面に窒化処理層が形成されたものである事を特徴とする波形保持器。
A pair of retainer elements and a plurality of rivets;
Both of these cage elements are each made of a metal plate capable of nitriding to have a corrugated annular shape as a whole, with semi-cylindrical curved plate portions at a plurality of locations in the circumferential direction and curved adjacent to each other in the circumferential direction. A flat plate portion is provided between the plate portions, and a through hole is provided in a part of each flat plate portion.
Each of the rivets is made of a metal that can be nitrided, and includes a collar portion and a head portion having a diameter larger than that of the collar portion provided at a base end portion of the collar portion,
The inner side surfaces of the flat plate portions of the two retainer elements are butted against each other, and the leading end portions of the rib portions are inserted into the through holes of the flat plate portions butted with the rib portions of the rivets. Crushing to form a caulking portion having a diameter larger than each of the flange portions, and joining the flat plate portions that are butted against each other by sandwiching the head portion and the caulking portion of each rivet, A corrugated cage that has a portion surrounded by a plate portion as a pocket for holding each ball in a freely rolling manner,
Each of these rivets in the state before forming the caulking portion has a cylindrical large-diameter portion in a portion near the head portion of the flange portion,
A fitting portion that can be fitted with a large diameter portion of each rivet and a tightening margin is provided on a part of the inner surface of each through hole of one of the cage elements. A gap is formed between the remaining portion and the outer peripheral surface of the large-diameter portion in a state where the large-diameter portion of each rivet is press-fitted into the fitting portion in the remaining portion of the inner surface of each through-hole. There is a non-fitting part,
Each of the rivets and the one cage element press-fit a large diameter portion of each rivet into a fitting portion of each through-hole of the one cage element, and each of the rivets is fitted to the one cage element. By performing nitriding in the state where the intermediate assembly formed by temporarily fixing is formed, among the surfaces of each rivet and one of the cage elements, these two members are in the state of the intermediate assembly. A nitriding layer is formed on the non-contact portion,
Of the two cage elements, the other cage element is subjected to a nitriding treatment alone to form a nitriding layer on the entire surface of the other cage element. Waveform holder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013176652A JP2015044220A (en) | 2013-08-28 | 2013-08-28 | Method for manufacturing waveform retainer and waveform retainer |
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| JP2013176652A JP2015044220A (en) | 2013-08-28 | 2013-08-28 | Method for manufacturing waveform retainer and waveform retainer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251925A (en) * | 2015-11-12 | 2016-01-20 | 中航工业哈尔滨轴承有限公司 | Solid two-half-retainer two-sided electrical riveting processing method |
| WO2021200736A1 (en) * | 2020-03-30 | 2021-10-07 | 日本製鉄株式会社 | Method for manufacturing contact joint structure, contact joint structure, and automotive part |
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2013
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251925A (en) * | 2015-11-12 | 2016-01-20 | 中航工业哈尔滨轴承有限公司 | Solid two-half-retainer two-sided electrical riveting processing method |
| WO2021200736A1 (en) * | 2020-03-30 | 2021-10-07 | 日本製鉄株式会社 | Method for manufacturing contact joint structure, contact joint structure, and automotive part |
| JPWO2021200736A1 (en) * | 2020-03-30 | 2021-10-07 | ||
| JP7485981B2 (en) | 2020-03-30 | 2024-05-17 | 日本製鉄株式会社 | Manufacturing method of bonded joint structure, bonded joint structure and automobile part |
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