JP2008064166A - Ball bearing - Google Patents

Ball bearing Download PDF

Info

Publication number
JP2008064166A
JP2008064166A JP2006241108A JP2006241108A JP2008064166A JP 2008064166 A JP2008064166 A JP 2008064166A JP 2006241108 A JP2006241108 A JP 2006241108A JP 2006241108 A JP2006241108 A JP 2006241108A JP 2008064166 A JP2008064166 A JP 2008064166A
Authority
JP
Japan
Prior art keywords
annular body
ball bearing
synthetic resin
wall
pocket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2006241108A
Other languages
Japanese (ja)
Inventor
Ryoichi Nakajima
良一 中島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2006241108A priority Critical patent/JP2008064166A/en
Priority to TW096129092A priority patent/TW200827577A/en
Priority to PCT/JP2007/067025 priority patent/WO2008029737A1/en
Publication of JP2008064166A publication Critical patent/JP2008064166A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3862—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together
    • F16C33/3875—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together made from plastic, e.g. two injection moulded parts joined by a snap fit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • 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
    • F16C33/3887—Details of individual pockets, e.g. shape or ball 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6614—Retaining the grease in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B29C2045/0027—Gate or gate mark locations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/04—Bearings
    • B29L2031/045—Bushes therefor
    • 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
    • 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
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/70—Positive connections with complementary interlocking parts
    • F16C2226/74—Positive connections with complementary interlocking parts with snap-fit, e.g. by clips

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Rolling Contact Bearings (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve reliability of a ball bearing by enhancing strength of a synthetic resin-made cage. <P>SOLUTION: This ball bearing is provided with the synthetic resin-made cage 4 in which hemispherical pockets 7 for storing balls 3 are formed on opposing faces of two synthetic resin annular bodies 6, 6 axially opposing to each other, leaving a gap in the circumferential direction and bonding parts 8 formed between adjacent pockets 7, 7 of the annular body 6 are bonded to bonding parts 8 formed between adjacent pockets 7, 7 of the other annular body 6. The balls 3 incorporated between an inner ring 1 and an outer ring 2 are held by the synthetic resin-made cage 4. Walls 14 leading from one of the adjacent pockets 7 to the other pocket 7 are formed in the sides of the bonding parts 8 opposite to the mating surfaces 11 with the bonding parts 8 of the other annular body 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、合成樹脂製保持器を組み込んだ玉軸受に関する。   The present invention relates to a ball bearing incorporating a synthetic resin cage.

主として高速回転用の玉軸受として、軸方向に対向する２枚の合成樹脂製環状体の対向面にボールを収容する半球状のポケットを周方向に間隔をおいて形成し、一方の環状体の隣り合うポケットの間に形成された結合部を、他方の環状体の隣り合うポケットの間に形成された結合部に結合する合成樹脂製保持器を有し、その合成樹脂製保持器で内輪と外輪の間に組み込まれたボールを保持するものが知られている（特許文献１）。   As a ball bearing mainly for high-speed rotation, hemispherical pockets for accommodating balls are formed on the opposing surfaces of two synthetic resin annular bodies facing in the axial direction at intervals in the circumferential direction. It has a synthetic resin cage that couples the coupling portion formed between adjacent pockets to the coupling portion formed between adjacent pockets of the other annular body, and the synthetic resin cage and the inner ring One that holds a ball incorporated between outer rings is known (Patent Document 1).

この玉軸受に組み込まれた合成樹脂製保持器を構成する環状体は、一般に、ポリアミド等の熱可塑性樹脂にガラス繊維などの繊維強化材を１０〜３０重量％添加したものを射出成形して製造される。   The annular body constituting the synthetic resin cage incorporated in this ball bearing is generally manufactured by injection molding of a thermoplastic resin such as polyamide to which fiber reinforcing material such as glass fiber is added in an amount of 10 to 30% by weight. Is done.

特開２００３−３４３５６７号公報JP 2003-343567 A

しかし、この合成樹脂製保持器は、ポケットの位置で環状体が薄くなっているので、環状体のポケットの位置に生じる応力が過大となると破損するおそれがある。特に、成形金型のキャビティ内で樹脂が合流するウエルド部が、環状体のポケットの位置に存在する場合、環状体がウエルド部で破損しやすい。   However, since the annular body is thin at the pocket position, the synthetic resin cage may be damaged if the stress generated at the pocket position of the annular body is excessive. In particular, when the weld portion where the resin merges in the cavity of the molding die exists at the position of the pocket of the annular body, the annular body easily breaks at the weld portion.

この発明が解決しようとする課題は、合成樹脂製保持器の強度を高めることにより、玉軸受の信頼性を向上させることである。   The problem to be solved by the present invention is to improve the reliability of the ball bearing by increasing the strength of the cage made of synthetic resin.

上記の課題を解決するために、合成樹脂製保持器を構成する環状体の前記結合部の他方の環状体の結合部との合わせ面とは反対側に、隣り合う一方のポケットから他方のポケットに至る壁を形成する構成を玉軸受に採用した。   In order to solve the above-mentioned problem, the one pocket adjacent to the other pocket on the opposite side to the mating surface of the coupling portion of the annular body constituting the synthetic resin cage and the coupling portion of the other annular body The structure which forms the wall leading to is adopted for the ball bearing.

この玉軸受は、次の構成を加えると好ましい。
１）前記壁にゲートを配置して前記環状体を射出成形する。
２）前記壁を、径方向に対向して対をなして形成し、その各壁の縁に切欠きを形成する。
３）前記結合部の他方の環状体の結合部との合わせ面とは反対側の面と、前記壁の側面とが円弧状につながるようにする。 This ball bearing is preferably added with the following configuration.
1) A gate is arranged on the wall and the annular body is injection molded.
2) The walls are formed in pairs in the radial direction, and a notch is formed at the edge of each wall.
3) A surface of the coupling portion opposite to the mating surface with the coupling portion of the other annular body and the side surface of the wall are connected in an arc shape.

上記２）の構成を加えたものは、さらに、前記切欠きを、前記環状体の径方向に見てＶ字状に形成し、その切欠きの底を円弧状に形成することができる。   What added the structure of said 2) can further form the said notch in V shape seeing in the radial direction of the said annular body, and can form the bottom of the notch in circular arc shape.

この発明の玉軸受は、合成樹脂製保持器を構成する環状体の結合部の他方の環状体の結合部との合わせ面とは反対側に、隣り合う一方のポケットから他方のポケットに至る壁を形成したので、環状体のポケットの位置に生じる応力が過大となりにくく、合成樹脂製保持器が破損しにくい。   The ball bearing according to the present invention has a wall extending from one adjacent pocket to the other pocket on the side opposite to the mating surface of the coupling portion of the annular body constituting the synthetic resin cage and the coupling portion of the other annular body. As a result, the stress generated at the position of the pocket of the annular body is unlikely to be excessive, and the synthetic resin cage is not easily damaged.

また、前記壁にゲートを配置して前記環状体を射出成形したものは、ゲートの大きさを大きくしてキャビティ内圧を確保し、これにより合成樹脂製保持器のウエルド部の強度を向上させることができる。   In addition, when the annular body is injection-molded by arranging a gate on the wall, the size of the gate is increased to secure the cavity internal pressure, thereby improving the strength of the weld portion of the synthetic resin cage. Can do.

また、前記壁を、径方向に対向して対をなして形成し、その各壁の縁に切欠きを形成したものは、壁間に溜まったグリースが壁の切欠きを通じて軸受の軌道面に供給されるので、軸受の潤滑性能に優れる。   In addition, the wall is formed in a pair opposed to each other in the radial direction, and a notch is formed at the edge of each wall. Grease accumulated between the walls passes through the notch of the wall to the bearing raceway surface. Since it is supplied, it has excellent lubrication performance of the bearing.

また、前記結合部の他方の環状体の結合部との合わせ面とは反対側の面と、前記壁の側面とが円弧状につながるようにしたものは、結合部と壁の間に応力集中を生じにくく、合成樹脂製保持器の強度が高い。   Further, the surface of the coupling portion opposite to the mating surface with the coupling portion of the other annular body and the side surface of the wall are connected in a circular arc shape, stress concentration between the coupling portion and the wall The strength of the synthetic resin cage is high.

さらに、前記切欠きを、前記環状体の径方向に見てＶ字状に形成し、その切欠きの底を円弧状に形成したものは、切欠きの底で応力集中が生じにくく、合成樹脂製保持器の強度が高い。   Furthermore, when the notch is formed in a V shape when viewed in the radial direction of the annular body and the bottom of the notch is formed in an arc shape, stress concentration is unlikely to occur at the bottom of the notch, and the synthetic resin The strength of the cage made is high.

図１に、この発明の実施形態の玉軸受を示す。この玉軸受は、内輪１と、外輪２と、内輪１と外輪２の間に組み込まれた複数のボール３と、ボール３を保持する保持器４とを有する。また、この玉軸受には、内輪１と外輪２の間に封入されたグリースの漏れを防止するシール部材５が組み込まれている。   FIG. 1 shows a ball bearing according to an embodiment of the present invention. This ball bearing has an inner ring 1, an outer ring 2, a plurality of balls 3 incorporated between the inner ring 1 and the outer ring 2, and a cage 4 that holds the balls 3. Further, a seal member 5 for preventing leakage of grease sealed between the inner ring 1 and the outer ring 2 is incorporated in this ball bearing.

保持器４は、図２に示す環状体６を、２枚軸方向に対向してなる。環状体６の対向面には、ボール３を収容する半球状のポケット７が周方向に間隔をおいて形成され、隣り合うポケット７、７の間に形成された結合部８には、係合爪９と係合孔１０が形成されている。   The cage 4 is formed by opposing two annular bodies 6 shown in FIG. 2 in the axial direction. On the opposite surface of the annular body 6, hemispherical pockets 7 for accommodating the balls 3 are formed at intervals in the circumferential direction, and the coupling portion 8 formed between the adjacent pockets 7, 7 is engaged with A claw 9 and an engagement hole 10 are formed.

係合爪９は、図３に示すように、他方の環状体６の結合部８に突き合わせる合わせ面１１から軸方向に突出して設けられ、図４に示すように、他方の環状体６の係合孔１０に挿入される。また、係合爪９の先端には鈎部１２が形成され、鈎部１２は、係合爪９が他方の環状体６の係合孔１０に挿入された状態で、係合孔１０の内面に形成された段部１３に係合し、これにより結合部８，８同士が結合される。   As shown in FIG. 3, the engaging claw 9 is provided so as to protrude in the axial direction from the mating surface 11 that abuts on the coupling portion 8 of the other annular body 6, and as shown in FIG. It is inserted into the engagement hole 10. Further, a flange 12 is formed at the tip of the engagement claw 9, and the flange 12 is an inner surface of the engagement hole 10 in a state where the engagement claw 9 is inserted into the engagement hole 10 of the other annular body 6. The joints 8 and 8 are coupled to each other.

結合部８の合わせ面１１の反対側には、図３に示すように、隣り合う一方のポケット７から他方のポケット７に至る壁１４が形成されている。壁１４は、図５に示すように、径方向に対向して対をなして形成され、各壁１４の側面１４Ａは、結合部８の合わせ面とは反対側の面８Ａと円弧状につながっている。また、各壁１４の縁には、図３に示すように径方向に見てＶ字状の切欠き１５が形成され、各切欠き１５の底は円弧状に形成されている。   As shown in FIG. 3, a wall 14 extending from one adjacent pocket 7 to the other pocket 7 is formed on the opposite side of the mating surface 11 of the coupling portion 8. As shown in FIG. 5, the walls 14 are formed in pairs in the radial direction, and the side surface 14A of each wall 14 is connected to the surface 8A opposite to the mating surface of the coupling portion 8 in an arc shape. ing. Further, as shown in FIG. 3, a V-shaped notch 15 is formed at the edge of each wall 14 as viewed in the radial direction, and the bottom of each notch 15 is formed in an arc shape.

ポケット７の両端には、図３に示すように、グリース溜りをなす断面Ｌ字状の凹部１６が形成されている。   At both ends of the pocket 7, as shown in FIG. 3, recesses 16 having an L-shaped cross section forming a grease reservoir are formed.

各環状体６は、合成樹脂の射出成形品からなり、必要に応じてガラス繊維等の繊維強化材が混入される。環状体６は、図２に示すように、内径側の各壁１４の位置に金型のゲート１７を配置して射出成形することにより形成されている。ゲート１７から注入された樹脂は、隣り合うゲート１７、１７間のウエルド部１８で合流している。   Each annular body 6 is made of a synthetic resin injection-molded product, and a fiber reinforcing material such as glass fiber is mixed as necessary. As shown in FIG. 2, the annular body 6 is formed by placing a mold gate 17 at the position of each wall 14 on the inner diameter side and performing injection molding. The resin injected from the gate 17 merges at the weld 18 between the adjacent gates 17 and 17.

環状体６の成形材料の母材としては、たとえばナイロン６６やナイロン４６などのポリアミド（ＰＡ）、ポリフェニレンサルファイド（ＰＰＳ）、ポリエーテルエーテルケトン（ＰＥＥＫ）等の熱可塑性樹脂を用いることができる。   As the base material of the molding material of the annular body 6, for example, a thermoplastic resin such as polyamide (PA) such as nylon 66 or nylon 46, polyphenylene sulfide (PPS), polyetheretherketone (PEEK) can be used.

また、母材に配合する繊維強化材としては、たとえばガラス繊維、カーボン繊維、アラミド繊維などを用いることができる。これらの繊維は、２種類以上組み合わせて用いてもよい。   Moreover, as a fiber reinforcing material mix | blended with a base material, glass fiber, carbon fiber, an aramid fiber etc. can be used, for example. Two or more of these fibers may be used in combination.

この玉軸受は、たとえば次のようにして組み立てることができる。まず、内輪１と外輪２との間にボール３を組み込み、そのボール３の位置を周方向に調整する。その後、ボール３にポケット７を対応させて環状体６、６を対向配置し、その環状体６、６を互いに近づけて、各環状体６の係合爪９を他方の環状体６の係合孔１０にそれぞれ挿入する。さらに環状体６、６を互いに近づけて、合わせ面１１が互いに接触する位置まで係合爪９を係合孔１０に挿入すると、係合爪９の鈎部１２が係合孔１０内の段部１３に係合して環状体６、６が互いに結合する。   This ball bearing can be assembled as follows, for example. First, the ball 3 is assembled between the inner ring 1 and the outer ring 2, and the position of the ball 3 is adjusted in the circumferential direction. Thereafter, the annular body 6, 6 is arranged opposite to the ball 3 in correspondence with the pocket 7, the annular bodies 6, 6 are brought close to each other, and the engaging claw 9 of each annular body 6 is engaged with the other annular body 6. Each is inserted into the hole 10. Further, when the annular bodies 6 and 6 are brought close to each other and the engaging claw 9 is inserted into the engaging hole 10 until the mating surfaces 11 come into contact with each other, the flange portion 12 of the engaging claw 9 is stepped in the engaging hole 10. 13 and the annular bodies 6 and 6 are coupled to each other.

この玉軸受は、保持器４を構成する環状体６の結合部８の合わせ面１１の反対側に、隣り合う一方のポケット７から他方のポケット７に至る壁１４を形成したので、環状体６がポケット７の位置で変形を生じにくく、ポケット７の位置に過大な応力を生じにくい。そのため、保持器４が破損しにくく、強度が高い。   In this ball bearing, a wall 14 extending from one adjacent pocket 7 to the other pocket 7 is formed on the opposite side of the mating surface 11 of the coupling portion 8 of the annular body 6 constituting the cage 4. However, it is difficult for deformation to occur at the position of the pocket 7 and excessive stress is hardly generated at the position of the pocket 7. Therefore, the cage 4 is not easily damaged and has high strength.

また、この玉軸受は、壁１４の位置にゲート１７を配置して環状体６を射出成形するので、壁１４を設けない場合に比べてゲート１７の大きさを大きくしてキャビティ内圧を確保することができ、これにより、ウエルド部１８の強度を高め、保持器４の強度を向上させることができる。   Further, in this ball bearing, the gate 17 is arranged at the position of the wall 14 and the annular body 6 is injection-molded. Therefore, the size of the gate 17 is increased to ensure the cavity internal pressure as compared with the case where the wall 14 is not provided. Thus, the strength of the weld portion 18 can be increased and the strength of the cage 4 can be improved.

また、この玉軸受は、保持器４の壁１４，１４間に溜まったグリースが、壁１４の切欠き１５を通じて軸受の軌道面に徐々に供給されるので、運転初期の発熱を抑えてグリースの熱劣化を抑制するとともに、軸受の回転抵抗を抑えることができる。   Further, in this ball bearing, since the grease accumulated between the walls 14 and 14 of the cage 4 is gradually supplied to the bearing raceway through the notch 15 of the wall 14, heat generation at the initial stage of operation can be suppressed and grease can be reduced. While suppressing thermal deterioration, the rotational resistance of the bearing can be suppressed.

また、この玉軸受は、保持器４を構成する環状体６の結合部８の合わせ面１１とは反対側の面８Ａと、壁１４の側面１４Ａとが円弧状につながっているので、結合部８と壁１４の間に応力集中を生じにくく、保持器４の強度が高い。さらに、壁１４の切欠き１５の底を円弧状に形成したので、切欠き１５の底で応力集中が生じにくく、保持器４の強度が高い。   Further, in this ball bearing, the surface 8A opposite to the mating surface 11 of the coupling portion 8 of the annular body 6 constituting the cage 4 and the side surface 14A of the wall 14 are connected in an arc shape. It is difficult for stress concentration to occur between the wall 8 and the wall 14, and the strength of the cage 4 is high. Furthermore, since the bottom of the notch 15 of the wall 14 is formed in an arc shape, stress concentration hardly occurs at the bottom of the notch 15, and the strength of the cage 4 is high.

図では、ウエルド部１８がポケット７の位置に形成されているが、結合部８の位置にウエルド部１８が形成されるようにゲート１７を配置するとより好ましい。このようにすると、環状体６の強度をより向上させることができる。   In the drawing, the weld portion 18 is formed at the position of the pocket 7, but it is more preferable to arrange the gate 17 so that the weld portion 18 is formed at the position of the coupling portion 8. In this way, the strength of the annular body 6 can be further improved.

切欠き１５の位置は、図３に示すように、径方向に見て係合孔１０の位置を避けて配置すると好ましい。このようにすると、環状体６の断面積を確保して、切欠き１５を形成することによる環状体６の強度低下を抑えることができる。   As shown in FIG. 3, the position of the notch 15 is preferably arranged so as to avoid the position of the engagement hole 10 when viewed in the radial direction. If it does in this way, the cross-sectional area of the annular body 6 can be ensured, and the strength reduction of the annular body 6 by forming the notch 15 can be suppressed.

また、この玉軸受は、環状体６を射出成形する金型のゲート１７が内径側の各壁１４に配置されているので、いずれの結合部８に対しても同じ相対位置にウエルド部１８がくる。そのため、環状体６の各々の結合部８が均等に成形収縮し、結合部８の合わせ面１１の高さにばらつきが生じにくい。よって、環状体６、６を結合したときに、係合爪９に生じる応力を抑えることができる。また、この玉軸受は、例えば急加速、急停止を行なったときに、ボールと保持器の衝突により保持器の係合を外す向きに大きい力が生じても、保持器の係合爪９の係合が外れにくく、耐久性に優れる。   Further, in this ball bearing, since a mold gate 17 for injection molding the annular body 6 is disposed on each inner wall 14, the weld portion 18 is located at the same relative position with respect to any coupling portion 8. come. Therefore, each joint portion 8 of the annular body 6 is uniformly molded and contracted, and variations in the height of the mating surface 11 of the joint portion 8 are unlikely to occur. Therefore, it is possible to suppress the stress generated in the engaging claws 9 when the annular bodies 6 and 6 are coupled. In addition, for example, when the ball bearing is suddenly accelerated or suddenly stopped, even if a large force is generated in the direction in which the cage is disengaged due to the collision between the ball and the cage, It is difficult to disengage and has excellent durability.

図では、深溝玉軸受を例に挙げてこの発明の玉軸受を説明しているが、この発明は、他の形式の玉軸受に適用してもよく、たとえばアンギュラ玉軸受に適用してもよい。   In the drawing, the deep groove ball bearing is taken as an example to describe the ball bearing of the present invention. However, the present invention may be applied to other types of ball bearings, for example, an angular ball bearing. .

上記実施形態では、環状体６、６を同一形状として生産性を高めているが、２枚の環状体は別形状でもよく、たとえば、係合爪９を一方の環状体にのみ形成し、係合孔１０を他方の環状体にのみ形成するようにしてもよい。   In the above embodiment, the productivity is improved by making the annular bodies 6 and 6 have the same shape, but the two annular bodies may have different shapes. For example, the engaging claw 9 is formed only on one annular body, The hole 10 may be formed only in the other annular body.

この発明の実施形態の玉軸受を示す断面図Sectional drawing which shows the ball bearing of embodiment of this invention 図１の合成樹脂製保持器を構成する一方の環状体を示す斜視図The perspective view which shows one annular body which comprises the synthetic resin holder | retainer of FIG. 図２の環状体を示す一部拡大断面図The partially expanded sectional view which shows the annular body of FIG. 図１の玉軸受を示す一部拡大断面図Partially enlarged sectional view showing the ball bearing of FIG. 図３のＶ−Ｖ線に沿った断面図Sectional drawing along the VV line of FIG.

符号の説明Explanation of symbols

３ ボール
４ 保持器
６ 環状体
７ ポケット
８ 結合部
８Ａ 合わせ面の反対側の面
１１ 合わせ面
１４ 壁
１４Ａ 側面
１５ 切欠き
１７ ゲート 3 Ball 4 Cage 6 Ring body 7 Pocket 8 Joint portion 8A Surface opposite to the mating surface 11 Matching surface 14 Wall 14A Side surface 15 Notch 17 Gate

Claims (5)

軸方向に対向する２枚の合成樹脂製環状体（６，６）の対向面にボール（３）を収容する半球状のポケット（７）を周方向に間隔をおいて形成し、前記環状体（６）の隣り合うポケット（７，７）の間に形成された結合部（８）を、他方の前記環状体（６）の隣り合うポケット（７，７）の間に形成された結合部（８）に結合した合成樹脂製保持器（４）を有し、その合成樹脂製保持器（４）で内輪（１）と外輪（２）の間に組み込まれたボール（３）を保持する玉軸受において、前記結合部（８）の他方の環状体（６）の結合部（８）との合わせ面（１１）とは反対側に、隣り合う一方のポケット（７）から他方のポケット（７）に至る壁（１４）を形成したことを特徴とする玉軸受。   A hemispherical pocket (7) for accommodating the ball (3) is formed on the opposing surface of two synthetic resin annular bodies (6, 6) opposed in the axial direction at intervals in the circumferential direction. A coupling portion (8) formed between adjacent pockets (7, 7) of (6) is replaced with a coupling portion formed between adjacent pockets (7, 7) of the other annular body (6). It has a synthetic resin cage (4) coupled to (8), and the synthetic resin cage (4) holds the ball (3) incorporated between the inner ring (1) and the outer ring (2). In the ball bearing, on the side opposite to the mating surface (11) with the coupling portion (8) of the other annular body (6) of the coupling portion (8), from one adjacent pocket (7) to the other pocket ( A ball bearing characterized in that a wall (14) leading to 7) is formed. 前記壁（１４）にゲート（１７）を配置して前記環状体（６）を射出成形した請求項１に記載の玉軸受。   The ball bearing according to claim 1, wherein the annular body (6) is injection-molded by arranging a gate (17) on the wall (14). 前記壁（１４）を、径方向に対向して対をなして形成し、その各壁（１４）の縁に切欠き（１５）を形成した請求項１または２に記載の玉軸受。   The ball bearing according to claim 1 or 2, wherein the walls (14) are formed in pairs in the radial direction, and a notch (15) is formed at an edge of each wall (14). 前記切欠き（１５）を、前記環状体（６）の径方向に見てＶ字状に形成し、その切欠き（１５）の底を円弧状に形成した請求項３に記載の玉軸受。   The ball bearing according to claim 3, wherein the notch (15) is formed in a V shape when viewed in the radial direction of the annular body (6), and the bottom of the notch (15) is formed in an arc shape. 前記結合部（８）の他方の環状体（６）の結合部（８）との合わせ面（１１）とは反対側の面（８Ａ）と、前記壁（１４）の側面（１４Ａ）とが円弧状につながる請求項１から４のいずれかに記載の玉軸受。   A surface (8A) opposite to the mating surface (11) with the joint portion (8) of the other annular body (6) of the joint portion (8) and a side surface (14A) of the wall (14). The ball bearing according to claim 1, wherein the ball bearing is connected in an arc shape.
JP2006241108A 2006-09-06 2006-09-06 Ball bearing Withdrawn JP2008064166A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2006241108A JP2008064166A (en) 2006-09-06 2006-09-06 Ball bearing
TW096129092A TW200827577A (en) 2006-09-06 2007-08-07 Ball bearing
PCT/JP2007/067025 WO2008029737A1 (en) 2006-09-06 2007-08-31 Ball bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006241108A JP2008064166A (en) 2006-09-06 2006-09-06 Ball bearing

Publications (1)

Publication Number Publication Date
JP2008064166A true JP2008064166A (en) 2008-03-21

Family

ID=39157167

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006241108A Withdrawn JP2008064166A (en) 2006-09-06 2006-09-06 Ball bearing

Country Status (3)

Country Link
JP (1) JP2008064166A (en)
TW (1) TW200827577A (en)
WO (1) WO2008029737A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020059829A1 (en) * 2018-09-21 2020-03-26 Ntn株式会社 Ball bearing retainer and rolling bearing
JP2020159548A (en) * 2018-09-21 2020-10-01 Ntn株式会社 Cage for ball bearing and rolling bearing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1404769B1 (en) * 2010-12-21 2013-11-29 Skf Ab RESTING BALL CAGE FOR BEARINGS AND RIGID BEARING UNIT
TWI631288B (en) * 2017-02-18 2018-08-01 宏科貿易股份有限公司 Ball bearing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102823A (en) * 1981-12-14 1983-06-18 Koyo Seiko Co Ltd Manufacture of synthetic resinous retainer
US5131762A (en) * 1991-07-02 1992-07-21 The Torrington Company High performance two-piece bearing cage
JPH0538418U (en) * 1991-10-28 1993-05-25 エヌテイエヌ株式会社 Cage made of synthetic resin for spherical roller bearings
JPH061848U (en) * 1992-06-12 1994-01-14 エヌティエヌ株式会社 Synthetic resin cage
JP2003184889A (en) * 2001-12-18 2003-07-03 Nsk Ltd Rolling bearing
JP4471864B2 (en) * 2005-02-18 2010-06-02 Ｎｔｎ株式会社 Ball bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020059829A1 (en) * 2018-09-21 2020-03-26 Ntn株式会社 Ball bearing retainer and rolling bearing
JP2020159548A (en) * 2018-09-21 2020-10-01 Ntn株式会社 Cage for ball bearing and rolling bearing
CN112739923A (en) * 2018-09-21 2021-04-30 Ntn株式会社 Retainer for ball bearing and rolling bearing
JP7535372B2 (en) 2018-09-21 2024-08-16 Ntn株式会社 Ball bearing cages and rolling bearings

Also Published As

Publication number Publication date
WO2008029737A1 (en) 2008-03-13
TW200827577A (en) 2008-07-01

Similar Documents

Publication Publication Date Title
JP4471864B2 (en) Ball bearing
JP4772381B2 (en) Synthetic resin cage and ball bearing using the cage
JP5876237B2 (en) Synthetic resin cage and ball bearing for ball bearings
US10378580B2 (en) Tapered roller bearing
JP2007040383A (en) Cage for ball bearing, and ball bearing
JP2006258172A (en) Synthetic resin retainer
KR20160027081A (en) Seal ring
CN107407333B (en) Ball bearing retainer and bearing
JP2008064166A (en) Ball bearing
JP4612597B2 (en) Synthetic resin cage
JP4601450B2 (en) Ball bearing
JP2009115128A (en) Retainer for roller bearing, and roller bearing
JP5692720B2 (en) Spherical plain bearing device
JP2011185385A (en) Rolling bearing and crown type cage
JP4601451B2 (en) Synthetic resin cage and ball bearing
JP2008128296A (en) Crown type synthetic resin cage for radial ball bearing, and radial ball bearing
JP2007333187A (en) Resin made crown cage for ball bearing, and ball bearing with the cage
JP2006258174A (en) Synthetic resin retainer
JP2007078029A (en) Resin corrugated retainer, ball bearing using the retainer, and method of manufacturing the resin corrugated retainer
JP6892787B2 (en) Crown type cage and rolling bearings equipped with it
JP2011127713A (en) Retainer for ball bearing, and ball bearing with the same
JP2007239854A (en) Synthetic resin holder
JP2006258166A (en) Ball bearing
WO2024048383A1 (en) Resin retainer and roller bearing
WO2016121562A1 (en) Retainer for ball bearing, and ball bearing using said retainer for ball bearing

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090831

A761 Written withdrawal of application

Free format text: JAPANESE INTERMEDIATE CODE: A761

Effective date: 20100601