JP4706715B2 - Method of manufacturing cage for thrust roller bearing - Google Patents

Method of manufacturing cage for thrust roller bearing Download PDF

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JP4706715B2
JP4706715B2 JP2008099164A JP2008099164A JP4706715B2 JP 4706715 B2 JP4706715 B2 JP 4706715B2 JP 2008099164 A JP2008099164 A JP 2008099164A JP 2008099164 A JP2008099164 A JP 2008099164A JP 4706715 B2 JP4706715 B2 JP 4706715B2
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pocket
roller
diameter side
outer diameter
cage
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JP2008202797A (en
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一之 小谷
渉 高見澤
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JTEKT Corp
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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
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/541—Details of individual pockets, e.g. shape or roller retaining means
    • 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
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/30—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for axial load mainly
    • F16C19/305—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for axial load mainly consisting of rollers held in a cage
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • F16C33/546—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part with a M- or W-shaped cross section
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/547—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from two parts, e.g. two discs or rings joined together

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

Description

本発明は、スラストころ軸受用保持器の製造方法に関する。   The present invention relates to a method for manufacturing a thrust roller bearing retainer.

例えば自動車の自動変速機などの各部には、スラストころ軸受が多数設けられているが、自動車の低燃費化を図るためには、上記スラストころ軸受の回転抵抗を可及的に軽減することが必要となる。   For example, many parts of an automatic transmission of an automobile are provided with thrust roller bearings. However, in order to reduce the fuel consumption of automobiles, the rotational resistance of the thrust roller bearings can be reduced as much as possible. Necessary.

この種のスラストころ軸受では、保持器に設けた平面視矩形のポケット内にころを収納した構成になっている。このスラストころ軸受では、回転遠心力の作用でころが径方向外向きに付勢されるので、このころの軸方向外端面がポケットの内周面において外径側の辺に対してすべり接触する。このすべり接触部分の摩擦が、スラストころ軸受の回転抵抗となり、高速回転になるほど、回転抵抗が増大する傾向となる。   This type of thrust roller bearing has a configuration in which the rollers are housed in a rectangular pocket in plan view provided in the cage. In this thrust roller bearing, the roller is urged radially outward by the action of rotational centrifugal force, so that the axial outer end surface of this roller is in sliding contact with the outer diameter side of the inner peripheral surface of the pocket. . The friction at the sliding contact portion becomes the rotational resistance of the thrust roller bearing, and the rotational resistance tends to increase as the rotational speed increases.

これに対し、スラストころ軸受の保持器においてポケットの内壁面の外径側にのみ、内径方向へ突出する凸部を設け、この凸部に対してころの軸方向外端面を当接させるようにしたものがある(例えば、特許文献１参照)。   On the other hand, in the cage of the thrust roller bearing, a convex portion protruding in the inner diameter direction is provided only on the outer diameter side of the inner wall surface of the pocket, and the axial outer end surface of the roller is brought into contact with the convex portion. (For example, refer to Patent Document 1).

この保持器は、一枚の環状板の円周数ヶ所にポケットを厚み方向に打ち抜き形成し、外周部分を内径側に折り返して二重にした構造である。この折り返した部分の先端面（内径面）は、ポケットの内壁面の外径側とほぼ面一になるように配置されており、この折り返し部分の先端面でポケットの周方向中心に対応する位置に、上記凸部が設けられている。
特開平１０−２２０４８２号公報 This cage has a structure in which pockets are punched and formed in the thickness direction at several circumferential positions of a single annular plate, and the outer peripheral portion is folded back to the inner diameter side to be doubled. The front end surface (inner diameter surface) of the folded portion is arranged so as to be substantially flush with the outer diameter side of the inner wall surface of the pocket, and the front end surface of the folded portion corresponds to the circumferential center of the pocket. The above-mentioned convex part is provided.
Japanese Patent Laid-Open No. 10-220482

上記従来例では、上記保持器の外周に折り返し部分を設けて、この折り返し部分の先端面に上記凸部を設けた形状にしているために、保持器を製造するうえで多くの工数が必要となってコストが嵩むとともに、ポケット内での凸部の配置位置がばらつきやすいと言える。そのため、回転遠心力によってころがポケット内で径方向外向きに付勢されたときに、ころの軸方向外端面の中心部からずれた位置に凸部が接触することが起こりうる。このような状況になると、ころの回転が阻害されることになりかねない。   In the conventional example, a folded portion is provided on the outer periphery of the cage, and the convex portion is provided on the tip surface of the folded portion. Therefore, a large number of man-hours are required for manufacturing the cage. Thus, the cost increases, and it can be said that the arrangement positions of the convex portions in the pockets are likely to vary. Therefore, when the roller is urged radially outward in the pocket by the rotational centrifugal force, the convex portion may come into contact with a position shifted from the center portion of the axial outer end surface of the roller. In such a situation, the rotation of the rollers may be hindered.

本発明のスラストころ軸受用保持器の製造方法は、一枚の金属製の環状板に複数のころを収納するためのポケットが形成されたスラストころ軸受用保持器の製造方法であって、金属板に絞り加工を施すことにより径方向途中領域に厚み方向に波打つ波打ち屈曲部を形成するとともに、前記波打ち屈曲部より径方向外径側の外径部および内径側の内径部は、前記波打ち屈曲部の上下波打ち高さの中間で径方向外方もしくは内方に広がる板状部分とし、その加工後の金属板に対して、前記波打ち屈曲部の外径側屈曲起点から内径側屈曲起点までの範囲においてころを収納するための平面視矩形のポケットを厚み方向に打ち抜き形成するとともに、このポケットの打ち抜き形成と同時に、このポケットの内外両側の内壁面のうち少なくとも外径側内壁面においてころの軸方向内外両端面のうち少なくとも軸方向外端面の中心部に対して当接して当該ころをピボット支持するための凸部と、前記ポケットの周方向で両側の内壁面に径方向三ヶ所でころの直径寸法より幅狭となるようにポケット内へ向けて突出するころ抜け止め用の爪とを形成することを特徴とする。 A method for manufacturing a cage for a thrust roller bearing according to the present invention is a method for manufacturing a cage for a thrust roller bearing in which a pocket for storing a plurality of rollers is formed in a single metal annular plate, A corrugated bent portion that undulates in the thickness direction is formed in the radially intermediate region by drawing the plate, and the outer diameter portion on the radial outer diameter side and the inner diameter portion on the inner diameter side of the wavy bent portion are It is a plate-like part that spreads radially outward or inward in the middle of the vertical wavy height of the part, and from the processed metal plate, from the outer radius side bending origin of the wavy bent portion to the inner radius side bending origin roller a rectangular shape in plan view of the pocket and forming punching in the thickness direction for accommodating in a range, simultaneously with the punching of the pocket, the at least the outer diameter side of the inner wall surface of the inner and outer sides of the pocket A convex portion for pivotal supporting the roller abuts against the central portion of at least the axially outer end face of the axial inner and outer end surfaces of the roller in the plane, radially on the inner wall surface of both sides in the circumferential direction of the pocket It is characterized by forming a claw for preventing a roller from protruding into the pocket so as to be narrower than the diameter of the roller at three positions.

このように、ポケットの内壁面にころをピボット支持させるための凸部をポケットの打ち抜きと同時に形成したものにしているから、ポケットの打ち抜き金型の抜き形状を管理するだけで、ポケット内における凸部の配置を簡単かつ精度よく行えるようになるとともに、保持器の製造工数が従来例よりも少なくできるようになる。   In this way, the convex part for pivotally supporting the roller on the inner wall surface of the pocket is formed at the same time as the punching of the pocket. Therefore, it is only necessary to manage the punching shape of the pocket punching mold, The arrangement of the parts can be performed easily and accurately, and the number of manufacturing steps of the cage can be reduced as compared with the conventional example.

ところで、上記環状板の径方向途中領域に、径方向に波打つ形状の波打ち屈曲部が絞り加工により設けられ、前記ポケットは、前記波打ち屈曲部において外径側の屈曲起点から内径側の屈曲起点までの範囲に設けられたものである。 By the way, in the radially intermediate region of the annular plate, a wavy bent portion having a shape that undulates in the radial direction is provided by drawing, and the pocket extends from the bending start point on the outer diameter side to the bending start point on the inner diameter side in the wavy bending portion. It is provided in the range .

これは、保持器の形状を特定したものであるが、この場合、ポケットの内壁面において周方向左右の部分が波打ち屈曲部となるから、波打ち屈曲部は、ポケットの打ち抜き加工と同時に形成することができて、簡単かつ精度よく行えるなど、ころの円滑な案内面とすることができる。   In this case, the shape of the cage is specified. In this case, since the left and right portions in the circumferential direction on the inner wall surface of the pocket are wavy bent portions, the wavy bent portions should be formed simultaneously with the punching processing of the pockets. It is possible to provide a smooth guide surface for the rollers, such as being easy and accurate.

本発明では、ポケットの打ち抜き金型の抜き形状を管理するだけでポケット内に対してころをピボット支持するための凸部を簡単に精度よく配置できるようになる。これにより、ころの軸方向外端面または軸方向内端面の中心部を前記凸部に対して正確に接触させることができるので、ころをほぼ純粋にピボット支持させる状態とすることができる。したがって、保持器に対するころの摩擦抵抗を軽減できて、スラストころ軸受の回転抵抗を軽減できるようになる。   In the present invention, it is possible to easily and accurately arrange the convex portions for pivotally supporting the rollers in the pockets only by managing the punching shape of the punching die for the pockets. Thereby, since the center part of the axial direction outer end surface or axial direction inner end surface of a roller can be made to contact with the said convex part correctly, it can be set as the state which carries out a pivot support of a roller substantially purely. Therefore, the frictional resistance of the roller against the cage can be reduced, and the rotational resistance of the thrust roller bearing can be reduced.

図１から図５に本発明の実施形態１を示している。図例のスラストころ軸受１は、保持器２と、複数のころ３とから構成されている。   1 to 5 show a first embodiment of the present invention. The illustrated thrust roller bearing 1 includes a cage 2 and a plurality of rollers 3.

保持器２は、一枚の環状板で製作される。この保持器２の径方向途中領域には、径方向に波打つ形状の波打ち屈曲部４が絞り加工により設けられている。   The cage 2 is made of a single annular plate. In the intermediate region in the radial direction of the cage 2, a corrugated bent portion 4 having a wave shape in the radial direction is provided by drawing.

この波打ち屈曲部４は、径方向交互に保持器２の厚み方向一方と他方とにほぼ均等に張り出された外径側張り出し部４ａ、内径側張り出し部４ｂ、中間張り出し部４ｃからなる。外径側張り出し部４ａおよび内径側張り出し部４ｂは保持器２の厚み方向一方に、また、中間張り出し部４ｃは厚み方向他方にそれぞれ張り出されている。   The wavy bent portion 4 is composed of an outer diameter side protruding portion 4a, an inner diameter side protruding portion 4b, and an intermediate protruding portion 4c that are protruded almost evenly in the thickness direction of the cage 2 in the radial direction. The outer diameter side projecting portion 4a and the inner diameter side projecting portion 4b are projected in one thickness direction of the cage 2, and the intermediate projecting portion 4c is projected in the other thickness direction.

上記保持器２の波打ち屈曲部４において外径側の屈曲起点から内径側の屈曲起点までの範囲の円周数ヶ所には、平面的に見て矩形のポケット５が厚み方向に打ち抜き形成されている。この各ポケット５に対してころ３が回動自在な状態で非分離に収納されている。つまり、ポケット５の内壁面において周方向左右に位置する外径側張り出し部４ａ、内径側張り出し部４ｂおよび中間張り出し部４ｃの各張り出し頂点部分の計三ヶ所に、ポケット５内へ向けて突出する爪７ａ，７ｂ，７ｃが設けられている。この爪７ａ，７ｂ，７ｃによって、各ポケット５において径方向の三ヶ所がころ３の直径寸法よりも幅狭になっており、これによってポケット５内からころ３が抜け出ないようになっている。なお、ポケット５に対してころ３は、無理嵌めされることで収納される。   In the corrugated bent portion 4 of the cage 2, rectangular pockets 5 are punched and formed in the thickness direction in a plan view at several circumferential positions in a range from the bending start point on the outer diameter side to the bending start point on the inner diameter side. Yes. The rollers 3 are housed in a non-separable manner so as to be rotatable with respect to the pockets 5. That is, it protrudes toward the inside of the pocket 5 at a total of three locations of the protruding ridge portions of the outer diameter side protruding portion 4a, the inner diameter side protruding portion 4b, and the intermediate protruding portion 4c located on the inner wall surface of the pocket 5 in the circumferential direction. Claws 7a, 7b, 7c are provided. By the claws 7a, 7b, and 7c, the three radial positions in each pocket 5 are narrower than the diameter of the roller 3, thereby preventing the roller 3 from coming out of the pocket 5. The roller 3 is stored in the pocket 5 by being forcibly fitted.

上記各ポケット５の内壁面において外径側と内径側には、ポケット５内へ向けて突出する凸部８，９が設けられている。この凸部８，９は、ころ３の軸方向外端面や軸方向内端面の中心部に対して当接してころ３をピボット支持するためのものであり、ポケット５を打ち抜いて形成するときに同時に形成される。この凸部８，９は、平面的に見て丸く湾曲した形状になっている。   Protrusions 8 and 9 projecting into the pocket 5 are provided on the outer diameter side and the inner diameter side of the inner wall surface of each pocket 5. The convex portions 8 and 9 are for abutting against the central portion of the axially outer end surface and the axially inner end surface of the roller 3 to pivotally support the roller 3. Formed simultaneously. The convex portions 8 and 9 are round and curved when viewed in plan.

なお、上記ころ３は、その端面の形状が平面形と呼ばれるタイプを用いている。但し、ころ３は、端面形状が丸面形と呼ばれるタイプを用いることもできる。   The roller 3 uses a type whose end face is called a flat shape. However, the roller 3 may be of a type whose end face shape is called a round shape.

次に、上記保持器２の製造手順を簡単に説明する。まず、一枚の金属板（ＪＩＳ規格ＳＰＣＤなど）の所定部位に中心孔を打ち抜き形成してから、絞り加工を施すことにより波打ち屈曲部４を形成する。この後、ポケット５を打ち抜き形成してから、外形部分を切り取る。このポケット５の形成と同時に上記凸部８，９および爪７ａ〜７ｃが形成される。そのために、ポケット５の打ち抜き金型の形状としては、予め凸部８，９および爪７ａ〜７ｃを含むポケット５の形状に対応して製作されている。   Next, the manufacturing procedure of the cage 2 will be briefly described. First, a center hole is punched and formed in a predetermined portion of a single metal plate (JIS standard SPCD or the like), and then the corrugated bent portion 4 is formed by drawing. Thereafter, the pocket 5 is punched and formed, and then the outer portion is cut out. Simultaneously with the formation of the pocket 5, the protrusions 8 and 9 and the claws 7a to 7c are formed. Therefore, the shape of the punching die of the pocket 5 is previously manufactured corresponding to the shape of the pocket 5 including the convex portions 8 and 9 and the claws 7a to 7c.

ところで、上述したような保持器２を有するスラストころ軸受１では、回転遠心力の作用でころ３が径方向外向きに付勢されるが、ころ３の軸方向外端面がポケット５の内壁面の外径側に設けてある凸部８に対して接触される。このとき、ころ３の軸方向外端面の中心部が凸部８の頂点部分に対して接触するので、ころ３が凸部８に対してほぼ純粋にピボット支持される状態になる。これにより、保持器２に対するころ３の軸方向外端面の摩擦抵抗がゼロに近くなるので、スラストころ軸受１の回転抵抗が大幅に軽減されることになる。   By the way, in the thrust roller bearing 1 having the cage 2 as described above, the roller 3 is urged radially outward by the action of the rotational centrifugal force, but the axially outer end surface of the roller 3 is the inner wall surface of the pocket 5. It contacts with the convex part 8 provided in the outer diameter side. At this time, the central portion of the outer end surface in the axial direction of the roller 3 is in contact with the apex portion of the convex portion 8, so that the roller 3 is pivotally supported with respect to the convex portion 8 almost purely. As a result, the frictional resistance of the axially outer end surface of the roller 3 with respect to the cage 2 becomes close to zero, so that the rotational resistance of the thrust roller bearing 1 is greatly reduced.

また、スラストころ軸受１が偏心回転するような状況では、ころ３の外径側の端面がポケット５の内壁面の外径側に設けてある凸部８に対して接触したり、ころ３の軸方向内端面がポケット５の内壁面の内径側に設けてある凸部９に対して接触したりすることになる。このような状況でも、ころ３の軸方向外端面の中心部は凸部８の頂点部分に対して、また、ころ３の軸方向内端面の中心部は凸部９の頂点部分に対して接触するので、ころ３が凸部８，９に対してほぼ純粋にピボット支持された状態になる。これにより、スラストころ軸受１が偏心回転したような状況でも回転抵抗が大幅に軽減されることになり、好ましい。   Further, in a situation where the thrust roller bearing 1 rotates eccentrically, the end surface on the outer diameter side of the roller 3 comes into contact with the convex portion 8 provided on the outer diameter side of the inner wall surface of the pocket 5, or the roller 3 The inner end surface in the axial direction comes into contact with the convex portion 9 provided on the inner diameter side of the inner wall surface of the pocket 5. Even in such a situation, the central portion of the outer end surface in the axial direction of the roller 3 is in contact with the apex portion of the convex portion 8, and the central portion of the inner end surface in the axial direction of the roller 3 is in contact with the apex portion of the convex portion 9. Therefore, the roller 3 is pivotally supported almost purely with respect to the convex portions 8 and 9. Thereby, even if the thrust roller bearing 1 is rotated eccentrically, the rotational resistance is greatly reduced, which is preferable.

以上説明したように、ポケット５の内壁面にころ３をピボット支持するための凸部８，９を、ポケット５の打ち抜きと同時に形成するようにしている。これにより、ポケット５の打ち抜き金型の抜き形状を管理するだけでポケット５内に対して凸部８，９を簡単に精度よく配置できるようになる。したがって、ころ３の軸方向外端面や軸方向内端面の中心部を凸部８，９の頂点に対して正確に接触させることができるので、ころ３をほぼ純粋なピボット支持状態とすることができて、保持器２に対するころ３の摩擦抵抗を軽減できるようになる。また、上記実施形態１では、従来例のように保持器の外周部分を内径側に折り返して、この折り返し部分の先端側に凸部を設けるような構造に比べて、保持器２の製造工数を少なくできるので、コスト低減に貢献できる。   As described above, the convex portions 8 and 9 for pivotally supporting the roller 3 on the inner wall surface of the pocket 5 are formed simultaneously with the punching of the pocket 5. Thereby, the convex portions 8 and 9 can be easily and accurately arranged in the pocket 5 only by managing the punching shape of the punching die of the pocket 5. Therefore, since the center part of the axially outer end face and the axially inner end face of the roller 3 can be accurately brought into contact with the apexes of the protrusions 8 and 9, the roller 3 can be in a substantially pure pivot support state. Thus, the frictional resistance of the roller 3 against the cage 2 can be reduced. Moreover, in the said Embodiment 1, compared with the structure which folds the outer peripheral part of a holder | retainer to an internal diameter side like the prior art example, and provides a convex part in the front end side of this turned-up part, the manufacturing man-hour of the holder | retainer 2 is reduced. Since it can be reduced, it can contribute to cost reduction.

このようなスラストころ軸受１を仮に自動車の変速機内で用いた場合、変速機の回転トルクが軽減されることになり、ひいては自動車の燃費低減に貢献できる。   If such a thrust roller bearing 1 is used in a transmission of an automobile, the rotational torque of the transmission is reduced, which can contribute to reducing the fuel consumption of the automobile.

図６および図７に本発明の実施形態２を示している。この実施形態２では、保持器２を二枚の環状板２Ａ，２Ｂを掌合結合した構成としている。   6 and 7 show Embodiment 2 of the present invention. In the second embodiment, the cage 2 has a structure in which two annular plates 2A and 2B are joined together.

具体的に、二つの環状板２Ａ，２Ｂにおいて径方向途中領域で厚み方向に合致する領域に、互いに離れる側に張り出す屈曲部４ｄ，４ｅが設けられている。これら二つの環状板２Ａ，２Ｂの各屈曲部４ｄ，４ｅにおいて外径側の屈曲起点から内径側の屈曲起点までの範囲で円周数ヶ所には、平面的に見て矩形のポケット５ａ，５ｂが厚み方向に同軸状に打ち抜き形成されている。これら二つの環状板２Ａ，２Ｂの両ポケット５ａ，５ｂを組み合わせて、ころ３を収納するポケットが構成されている。   Specifically, the two annular plates 2A and 2B are provided with bent portions 4d and 4e projecting to the side away from each other in a region that coincides with the thickness direction in a region in the radial direction. In each of the bent portions 4d and 4e of the two annular plates 2A and 2B, there are rectangular pockets 5a and 5b when viewed from above in a range from a bending start point on the outer diameter side to a bending start point on the inner diameter side. Is formed by being coaxially formed in the thickness direction. A pocket for storing the rollers 3 is formed by combining the pockets 5a and 5b of the two annular plates 2A and 2B.

また、二つの環状板２Ａ，２Ｂの各屈曲部４ｄ，４ｅの各張り出し頂点部分に、ポケット５ａ，５ｂ内へ向けて突出する爪７ｄ，７ｅが設けられている。この爪７ｄ，７ｅによって、各ポケット５ａ，５ｂの径方向の一ヶ所がころ３の直径寸法よりも幅狭になっており、これによってポケット５ａ，５ｂ内からころ３が抜け出ないようになっている。   In addition, claws 7d and 7e projecting into the pockets 5a and 5b are provided at the protruding vertex portions of the bent portions 4d and 4e of the two annular plates 2A and 2B. Due to the claws 7d and 7e, one portion in the radial direction of each pocket 5a and 5b is narrower than the diameter of the roller 3, so that the roller 3 does not come out of the pocket 5a and 5b. Yes.

特に、この実施形態２では、第１環状板２Ａの屈曲部４ｄの張り出し寸法を、第２環状板２Ｂの屈曲部４ｅの張り出し寸法よりも大きく設定することにより、ポケット５ａ，５ｂ内にころ３を収納した状態で、ころ３の回転中心を、第１環状板２Ａの厚み方向中心と合致させようにして、第２環状板２Ｂの厚み方向中心をころ３の回転中心からオフセットさせるようにしている。   In particular, in the second embodiment, by setting the protruding dimension of the bent portion 4d of the first annular plate 2A to be larger than the protruding dimension of the bent portion 4e of the second annular plate 2B, the rollers 3 are inserted into the pockets 5a and 5b. In such a state that the center of rotation of the roller 3 coincides with the center of the first annular plate 2A in the thickness direction, and the center of the second annular plate 2B in the thickness direction is offset from the center of rotation of the roller 3. Yes.

そして、二つの環状板２Ａ，２Ｂのうち、ころ３の回転中心と一致させた第１環状板２Ａのポケット５ａの内壁面において外径側と内径側とに対して、凸部８，９が設けられている。この凸部８，９は、第１環状板２Ａにポケット５ａを打ち抜き形成するときに同時に形成される。   Then, of the two annular plates 2A and 2B, the convex portions 8 and 9 are provided on the inner wall surface of the pocket 5a of the first annular plate 2A that is aligned with the center of rotation of the roller 3 with respect to the outer diameter side and the inner diameter side. Is provided. The convex portions 8 and 9 are formed at the same time when the pocket 5a is formed by punching the first annular plate 2A.

なお、二つの環状板２Ａ，２Ｂの結合は、軸方向隣り合わせに掌合させた状態で、第２環状板２Ｂの内径部分を第１環状板２Ａの内径部分に対して引っ掛けるように折り曲げてかしめることによって行われている。前記かしめは、第２環状板２Ｂの外径側のみ、または内径側と外径側の両方に施すこともできる。   The two annular plates 2A and 2B may be joined by bending the inner diameter portion of the second annular plate 2B so as to be hooked to the inner diameter portion of the first annular plate 2A in a state where the two annular plates 2A and 2B are aligned side by side in the axial direction. It is done by crushing. The caulking can be performed only on the outer diameter side of the second annular plate 2B or on both the inner diameter side and the outer diameter side.

このような実施形態２の場合も、上記実施形態１と同様、ころ３の軸方向外端面や軸方向内端面の中心部を凸部８，９の頂点部分に対して正確に接触させることができるので、ころ３をほぼ純粋にピボット支持させる状態とすることができて、保持器２に対するころ３の摩擦抵抗を軽減できるようになる。   In the case of the second embodiment as well, as in the first embodiment, the central portion of the outer end surface in the axial direction of the roller 3 or the inner end surface in the axial direction can be accurately brought into contact with the apex portions of the convex portions 8 and 9. As a result, the roller 3 can be pivotally supported almost purely, and the frictional resistance of the roller 3 against the cage 2 can be reduced.

特に、上記実施形態２の場合、二つの環状板２Ａ，２Ｂそれぞれに一つずつ曲がりや張り出しの小さい屈曲部４ｄ，４ｅを設けているから、上記実施形態１に比べて簡単に加工できるというメリットがある。   In particular, in the case of the second embodiment, each of the two annular plates 2A and 2B is provided with bent portions 4d and 4e having small bends and overhangs, so that it is easier to process than the first embodiment. There is.

なお、本発明は上述した実施形態１、２に限定されるものではない。例えば図示しないが、ポケット５，５ａの内壁面の外径側にのみ凸部８を設けたもの、つまりポケット５，５ａの内壁面の内径側に凸部９を設けないようにしたものも本発明に含まれる。   The present invention is not limited to the first and second embodiments described above. For example, although not shown in the drawings, the projections 8 are provided only on the outer diameter side of the inner wall surfaces of the pockets 5 and 5a, that is, the projections 9 are not provided on the inner diameter side of the inner wall surfaces of the pockets 5 and 5a. Included in the invention.

本発明の実施形態１に係るスラストころ軸受を示す平面図The top view which shows the thrust roller bearing which concerns on Embodiment 1 of this invention. 図１の保持器のポケット周辺を拡大して示す斜視図The perspective view which expands and shows the pocket periphery of the holder | retainer of FIG. 図１の保持器のポケット周辺を拡大して示す平面図The top view which expands and shows the pocket periphery of the holder | retainer of FIG. 図３の（４）−（４）線断面の矢視図Arrow view of section of line (4)-(4) in FIG. 図３の（５）−（５）線断面の矢視図3 is a cross-sectional view taken along line (5)-(5) in FIG. 本発明の実施形態２に係るスラストころ軸受で、図４に対応する図FIG. 4 is a view corresponding to FIG. 4 showing a thrust roller bearing according to Embodiment 2 of the present invention. 図６の保持器のポケット周辺を拡大して示す平面図The top view which expands and shows the pocket periphery of the holder | retainer of FIG.

符号の説明Explanation of symbols

１ スラストころ軸受
２ 保持器
３ ころ
４ 保持器の波打ち屈曲部
５ 保持器のポケット
８ 外径側の凸部
９ 内径側の凸部 DESCRIPTION OF SYMBOLS 1 Thrust roller bearing 2 Cage 3 Roller 4 Cage bending part of cage 5 Cage pocket 8 Convex part on outer diameter side 9 Convex part on inner diameter side

Claims (1)

一枚の金属製の環状板に複数のころを収納するためのポケットが形成されたスラストころ軸受用保持器の製造方法であって、
金属板に絞り加工を施すことにより径方向途中領域に厚み方向に波打つ波打ち屈曲部を形成するとともに、前記波打ち屈曲部より径方向外径側の外径部および内径側の内径部は、前記波打ち屈曲部の上下波打ち高さの中間で径方向外方もしくは内方に広がる板状部分とし、
その加工後の金属板に対して、前記波打ち屈曲部の外径側屈曲起点から内径側屈曲起点までの範囲においてころを収納するための平面視矩形のポケットを厚み方向に打ち抜き形成するとともに、このポケットの打ち抜き形成と同時に、このポケットの内外両側の内壁面のうち少なくとも外径側内壁面においてころの軸方向内外両端面のうち少なくとも軸方向外端面の中心部に対して当接して当該ころをピボット支持するための凸部と、前記ポケットの周方向で両側の内壁面に径方向三ヶ所でころの直径寸法より幅狭となるようにポケット内へ向けて突出するころ抜け止め用の爪とを形成する、ことを特徴とするスラストころ軸受用保持器の製造方法。 A method for manufacturing a retainer for a thrust roller bearing in which a pocket for storing a plurality of rollers in a single metal annular plate is formed,
The metal plate is drawn to form a wavy bent portion that undulates in the thickness direction in the radially intermediate region, and the outer diameter portion on the radial outer diameter side and the inner diameter portion on the inner diameter side of the wavy bent portion are A plate-shaped part that spreads radially outward or inward in the middle of the vertical wavy height of the bent part,
On the metal plate after the processing, a rectangular pocket in a plan view for punching the roller in the range from the outer diameter side bending start point to the inner diameter side bending start point of the wavy bent portion is formed by punching in the thickness direction. At the same time as the punching of the pocket, at least the inner wall surface on both the inner and outer sides of the pocket is in contact with at least the center portion of the outer end surface in the axial direction on the inner wall surface on the outer diameter side, and A protrusion for pivot support, and a claw for preventing a roller from protruding into the pocket so as to be narrower than the diameter dimension of the roller at three radial positions on the inner wall surfaces on both sides in the circumferential direction of the pocket; Forming a thrust roller bearing retainer.
JP2008099164A 2008-04-07 2008-04-07 Method of manufacturing cage for thrust roller bearing Expired - Fee Related JP4706715B2 (en)

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Publication number Priority date Publication date Assignee Title
US8529137B2 (en) * 2010-04-12 2013-09-10 Schaeffler Technologies AG & Co. KG Radial bearing cage with contact feature
JP6089607B2 (en) 2012-11-07 2017-03-08 株式会社ジェイテクト Thrust roller bearing cage
CN111843383B (en) * 2020-07-16 2022-05-17 嘉善迈德机械有限公司 Manufacturing process of self-lubricating bearing

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JPS4627365Y1 (en) * 1967-05-01 1971-09-21
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JPH10220482A (en) * 1997-02-13 1998-08-21 Nippon Seiko Kk Holder for thrust roller bearing
JPH10252654A (en) * 1997-03-10 1998-09-22 Nippon Seiko Kk Thrust roller bearing device
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JP2000213546A (en) * 1999-01-28 2000-08-02 Ntn Corp Cage for thrust needle roller bearing and manufacture thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015104946A1 (en) 2014-01-10 2015-07-16 Ntn株式会社 Thrust roller bearing retainer and method for manufacturing same
US10060476B2 (en) 2014-01-10 2018-08-28 Ntn Corporation Thrust roller bearing cage and method for manufacturing the same

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