WO2006019121A1 - 軸受用保持器 - Google Patents
軸受用保持器 Download PDFInfo
- Publication number
- WO2006019121A1 WO2006019121A1 PCT/JP2005/015024 JP2005015024W WO2006019121A1 WO 2006019121 A1 WO2006019121 A1 WO 2006019121A1 JP 2005015024 W JP2005015024 W JP 2005015024W WO 2006019121 A1 WO2006019121 A1 WO 2006019121A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- formula
- polyamide
- group
- alkylene group
- chemical
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/32—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids from aromatic diamines and aromatic dicarboxylic acids with both amino and carboxylic groups aromatically bound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/265—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids from at least two different diamines or at least two different dicarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- 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
- F16C33/56—Selection of substances
-
- 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
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/60—Polyamides [PA]
Definitions
- the present invention relates to a bearing retainer for holding a rolling element of a rolling bearing.
- the upper limit temperature of use of the bearing retainer is higher than the upper limit temperature of use of the same bearing retainer in an oxidative degradation environment. It is only in the low range of ⁇ 30 ° C. Therefore, there is a need for a bearing cage that has good resistance to as many types of lubricants as possible over a wider temperature range.
- Patent Document 1 discloses an aromatic dicarboxylic acid component unit containing at least a terephthalic acid component unit and a linear aliphatic diamine component unit having 6 to 18 carbon atoms.
- a cage for a bearing formed of a resin composition containing an aromatic polyamide comprising: and a glass fiber is described.
- Patent Document 2 describes a bearing cage formed of a resin composition containing the aromatic polyamide, a modified polyolefin graft-modified with acrylic acid or the like, and glass fiber.
- Patent Document 1 JP, 03-143957, A
- Patent Document 2 JP, 04-327024, A
- the object of the present invention is to provide a bearing cage made of grease that can be used in various applications because it has sufficiently good resistance to a wider variety of lubricants in a wider temperature range. Is to provide.
- the present invention is a bearing cage formed of a resin composition containing polyamide, wherein the polyamide has the formula (1):
- the p-phenylene group has a function of stiffening the main chain of the polyamide.
- the heat resistance of the bearing cage can be improved and the upper limit temperature of the bearing cage in the lubricating oil can be increased.
- the branched chain alkylene group having 610 carbon atoms improves the resistance of the polyamide to the extreme pressure additive contained in the lubricating oil.
- the bearing cage can be improved in resistance to various lubricating oils by the function of the branched chain alkylene group. Therefore, according to the present invention, resin bearing cages can be used for various purposes because they have sufficiently good resistance to a wider variety of lubricants in a wider temperature range. Can be provided.
- the straight-chain alkylene group having 6 to 10 carbon atoms which is used together with the above two groups, appropriately breaks the regularity of the repeating unit in the main chain of the polyamide. It has a function and has a high degree of freedom in rotational rotation of the bond and is flexible. Therefore, it is possible to suppress the polyamide main chain from being too rigid and to produce a polyamide by injection molding or the like. It is also possible to improve the moldability.
- the bearing cage is imparted with appropriate flexibility and toughness, and the bearing cage is resistant to the impact during rotation of the rolling bearing. Impact properties can be improved.
- the molded bearing retainer is taken out of a mold or pressed into a pocket.
- cracks and cracks can be prevented from occurring.
- FIG. 1 When the bearing cages manufactured in the examples and comparative examples of the present invention are immersed in high-temperature lubricating oil, the immersion time and the tensile breaking strength with respect to the initial values before immersion. It is a graph which shows the relationship with a retention rate.
- the bearing cage of the present invention is formed of a resin composition containing polyamide, and the polyamide is represented by the formula (1):
- the straight chain alkylene group having 6 to 10 carbon atoms includes a hexamethylene group [one (CH)-], a heptamethylene group [one (CH)-], an otatamethylene group [ 1 (CH)-], no
- Each alkylene group can be used alone or in combination of two or more.
- examples of the branched chain alkylene group having 6 to 10 carbon atoms include 2, 2 dimethyltetramethylene group [—CH 2 —C (CH) — (CH) —], 2, 3 dimethyltetramethylene group [—CH ⁇ CH (
- Pentamethylene group [one (CH) -CH (CH)-(CH)-], 2, 3 dimethylpentamethylene
- polyamide any combination of the above three groups can be used.
- the proportion of the three groups contained in the polyamide is the balance of the effects of each group described above. Is considered, the molar ratio of p-phenylene group to the total of two alkylene groups (p-phenylene group) / (alkylene group) force formula (0:
- the ratio of the straight chain alkylene group to the branched chain alkylene group is such that the molar ratio (straight chain alkylene group) / (branched chain alkylene group) is represented by the formula GO:
- the proportion of branched chain alkylene is less than the above range, the effect of improving the resistance of the bearing cage to various lubricating oils by the branched chain alkylene group may not be sufficiently obtained.
- the number of linear alkylene groups is less than the above range, the polyamide main chain due to the linear alkylene groups is suppressed from being too rigid and the moldability of the polyamide by injection molding or the like is improved. The effect may not be obtained sufficiently.
- the bearing cage in a bearing cage having a shape with an undercut pocket, the bearing cage may be easily cracked or cracked during molding or when a rolling element is press-fitted.
- polyamides containing three types of groups in the above proportions include:
- One example is a polyamide force S in which R 2 is a p-phenylene group and the other is a mixture of the two types of alkylene groups.
- Specific examples of the polyamide are shown below.
- R 1 in formula (1) is a p-furylene group, formula (1-1):
- R 21 represents a linear alkylene group having 6 to: LO carbon atoms.
- R 2 in formula (2) is a branched alkylene group of 6 to: LO, formula (2-2):
- R 22 represents a branched alkylene group having 6 to carbon atoms and LO. ]
- a polyamide comprising at least one repeating unit represented by:
- R 1 in formula (1) is a linear alkylene group having 6 to 10 carbon atoms:
- R 11 in the formula represents a linear alkylene group having 6 to carbon atoms and LO. ]
- At least one of the repeating units represented by formula (1) and R 1 in formula (1) is a branched chain having 6 to 10 carbon atoms
- a part of R 1 is a p-phenylene group and the rest is at least one of two alkylene groups
- a part of R 2 is a p-phenylene group
- the rest is 2 It is possible to use a polyamide in which at least one of the alkylene groups and the ratio of the three groups is within the above range.
- Polyamide is represented by the formula (3):
- the polyamide of the above (I) includes terephthalic acid in which R 1 in the formula (3) is a p-phenylene group, and R 2 in the formula (4) has 6 to 10 carbon atoms.
- at least one of the branched aliphatic diamines in which R 2 in formula (4) is a branched chain alkylene group having a carbon number of 6 to LO and 2 moles of terephthalic acid is 2 It can be synthesized by reacting the species of diamines in a total proportion of about 1 mole.
- the polyamide of the above (II) includes at least one linear aliphatic dicarboxylic acid in which R 1 in the above formula (3) is a straight chain alkylene group having 6 to carbon atoms: LO, 3) At least one branched aliphatic dicarboxylic acid in which R 1 is a branched alkylene group having 6 to 10 carbon atoms, and R 2 force in formula (4) is a p-phenylene group.
- -Phenylenediamine can be synthesized by reacting two dicarboxylic acids at a ratio of about 1 mol with respect to 1 mol of p-phenylenediamine.
- a method of synthesizing polyamide by reacting each component for example, a method of polycondensation reaction of each component by a solution method or an interface method, or a nylon salt produced from each component
- a method may be mentioned in which an oligomer is synthesized by heating and then solution polymerization or solid phase polymerization is performed.
- the resin composition containing the polyamide and used as a bearing cage may be blended with other resin as long as the properties of the polyamide are not impaired.
- other resins that may be blended include various polyamides other than the polyamide.
- the blending ratio of other resins is 100 parts by weight of the polyamide. On the other hand, it is preferably 10 parts by weight or less.
- the greave composition may contain reinforcing fibers, fillers, and other various additives as in the conventional art.
- reinforcing fibers include glass fibers, carbon fibers, fibrous wollastonite (wollastonite), carbon carbide fibers, boron fibers, alumina fibers, Si—Ti—C—O fibers, and metal fibers (copper, Steel, stainless steel, etc.), aromatic polyamide fiber, potassium titanate whisker, graphite whisker, carbonized whisker, nitride caustic whisker, and alumina whisker.
- filler for example, phenol resin, silicone resin, fluorine resin, polyamide imide resin, polyimide resin, aromatic polyamide resin, etc., heat resistant resin powder, dullite, alumina , Silica, carbide, nitride, carbon black, molybdenum disulfide
- inorganic powders such as den, talc, diatomaceous earth, asbestos, magnesium carbonate, calcium carbonate, glass beads, and sili balloon.
- Either one of the reinforcing fiber and the filler may be blended in the resin composition, or both may be blended.
- the blending ratio that is, when only one of the reinforcing fiber or filler is blended alone, the blending ratio of the single component, and when both are combined, the total blending ratio of the two is:
- the total amount of resin containing polyamide that is, when the resin is only the polyamide, the amount thereof, and when the resin is a mixture of polyamide and other resins, the total amount is 10 to 10 parts by weight with respect to 100 parts by weight. 40 parts by weight is preferred.
- the blending ratio of reinforcing fiber and Z or filler is less than the above range, the effect of adding these components, that is, the effect of reinforcing the bearing cage may not be sufficiently obtained. Further, if the blending ratio exceeds the above range, the moldability of the resin composition by injection molding may be reduced.
- the bearing cage of the present invention is formed by injection molding or the like as in the prior art after melting and kneading each of the above components to form a pellet or powder form that can be used as a molding material. It is manufactured by doing.
- the configuration of the present invention can be applied to various types of bearing cages for various rolling bearings such as ball bearings, needle roller bearings, cylindrical roller bearings, and conical roller bearings.
- the bearing cage of the present invention has sufficiently good resistance to a wider variety of lubricating oils in a wider temperature range than conventional polyamide ones. Then, it can be used for various applications such as rolling bearings that are used under strong oil lubrication that cannot use bearing cages made of grease. Therefore, until now, metal bearing cages have been used. For example, by incorporating them in rolling bearings of automobile transmissions, it is possible to reduce the weight and cost of the rolling bearings. Become.
- a resin composition is prepared by melting and kneading 70 parts by weight of a polyamide composed of repeating units that are methylhexamethylene groups and 30 parts by weight of glass fiber. A bearing cage was manufactured.
- the molar ratio (p-phenylene group) / (alkylene group) of the above formula (represented by 0, P-phenylene group and the total of two alkylene groups) is 1/1.
- the molar ratio of the hexamethylene group, which is a straight chain alkylene group, to the 2-methyl hexamethylene group, which is a branched chain alkylene group, represented by the formula GO (straight chain alkylene group) Z (branched chain alkylene group) is 2Z3 ⁇ 1 Z4.
- 70 parts by weight of a polyamide composed of a repeating unit in which R 2 in the formula (2) is a hexamethylene group and 30 parts by weight of glass fiber are melted and kneaded to prepare a resin composition, A bearing cage was manufactured by injection molding using the resin composition.
- the molar ratio of p-phenylene group to hexamethylene group (p-phenylene group) / (hexamethylene group) was 1Z1.
- a resin composition is prepared by melting and kneading 70 parts by weight of polyamide composed of a return unit and 30 parts by weight of glass fiber, and producing a bearing cage by injection molding using the resin composition. Built. In the polyamide, the molar ratio of p-phenylene group and tetramethylene group to hexamethylene group (p-phenylene group + tetramethylene group) / (hexamethylene group) is 1.
- the molar ratio of Zl, p-phenylene group to tetramethylene group was (p-phenylene group)> (tetramethylene group).
- the bearing cage of Example 1 has a lower rate of decrease in tensile rupture strength than that of Comparative Examples 1 and 2, and retains the tensile rupture strength of 80% or more of the initial value even after 1000 hours of immersion. It was confirmed that
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05780420A EP1790867B9 (en) | 2004-08-17 | 2005-08-17 | Bearing retainer |
US11/660,159 US20070253654A1 (en) | 2004-08-17 | 2005-08-17 | Bearing Retainer |
JP2006531832A JP4952996B2 (ja) | 2004-08-17 | 2005-08-17 | 軸受用保持器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004237213 | 2004-08-17 | ||
JP2004-237213 | 2004-08-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006019121A1 true WO2006019121A1 (ja) | 2006-02-23 |
Family
ID=35907504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/015024 WO2006019121A1 (ja) | 2004-08-17 | 2005-08-17 | 軸受用保持器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070253654A1 (ja) |
EP (1) | EP1790867B9 (ja) |
JP (1) | JP4952996B2 (ja) |
CN (1) | CN100540927C (ja) |
WO (1) | WO2006019121A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101875777B (zh) * | 2009-04-29 | 2013-09-25 | 湖南省映鸿科技有限公司 | 一种高分子—陶瓷复合材料 |
CN105492581B (zh) * | 2013-09-19 | 2020-01-21 | Ntn株式会社 | 固体润滑剂以及固体润滑滚动轴承 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03143957A (ja) | 1989-10-27 | 1991-06-19 | Mitsui Petrochem Ind Ltd | 転がり軸受用保持器 |
JPH04327024A (ja) | 1991-04-26 | 1992-11-16 | Mitsui Petrochem Ind Ltd | 転がり軸受用保持器 |
JPH04362311A (ja) * | 1991-06-04 | 1992-12-15 | Koyo Seiko Co Ltd | 転がり軸受用保持器 |
JPH0753715A (ja) * | 1993-08-19 | 1995-02-28 | Mitsui Petrochem Ind Ltd | ポリアミド、その製造方法、ポリアミド樹脂組成物および用途 |
JPH07190069A (ja) * | 1993-08-10 | 1995-07-28 | Koyo Seiko Co Ltd | 転がり軸受用保持器 |
JPH07216223A (ja) * | 1994-01-26 | 1995-08-15 | Du Pont Kk | ポリアミド樹脂組成物およびその成形品 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5236264A (en) * | 1991-06-10 | 1993-08-17 | Nsk Ltd. | Linear bearing |
US5807920A (en) * | 1993-08-10 | 1998-09-15 | Koyo Seiko Co., Ltd. | Retainer for rolling-contact element |
US5750639A (en) * | 1994-01-26 | 1998-05-12 | E. I. Du Pont De Nemours And Company | Polyamide resin composition and molding thereof |
JP3507554B2 (ja) * | 1994-07-15 | 2004-03-15 | 光洋精工株式会社 | 合成樹脂製保持器 |
JP2000227120A (ja) * | 1999-02-05 | 2000-08-15 | Nsk Ltd | 転がり軸受 |
CA2386717A1 (en) * | 2001-05-21 | 2002-11-21 | Kuraray Co., Ltd. | Polyamide composition |
-
2005
- 2005-08-17 JP JP2006531832A patent/JP4952996B2/ja not_active Expired - Fee Related
- 2005-08-17 EP EP05780420A patent/EP1790867B9/en not_active Expired - Fee Related
- 2005-08-17 WO PCT/JP2005/015024 patent/WO2006019121A1/ja active Application Filing
- 2005-08-17 US US11/660,159 patent/US20070253654A1/en not_active Abandoned
- 2005-08-17 CN CNB2005800276364A patent/CN100540927C/zh not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03143957A (ja) | 1989-10-27 | 1991-06-19 | Mitsui Petrochem Ind Ltd | 転がり軸受用保持器 |
JPH04327024A (ja) | 1991-04-26 | 1992-11-16 | Mitsui Petrochem Ind Ltd | 転がり軸受用保持器 |
JPH04362311A (ja) * | 1991-06-04 | 1992-12-15 | Koyo Seiko Co Ltd | 転がり軸受用保持器 |
JPH07190069A (ja) * | 1993-08-10 | 1995-07-28 | Koyo Seiko Co Ltd | 転がり軸受用保持器 |
JPH0753715A (ja) * | 1993-08-19 | 1995-02-28 | Mitsui Petrochem Ind Ltd | ポリアミド、その製造方法、ポリアミド樹脂組成物および用途 |
JPH07216223A (ja) * | 1994-01-26 | 1995-08-15 | Du Pont Kk | ポリアミド樹脂組成物およびその成形品 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1790867A4 * |
Also Published As
Publication number | Publication date |
---|---|
JPWO2006019121A1 (ja) | 2008-05-08 |
EP1790867B1 (en) | 2011-07-06 |
CN100540927C (zh) | 2009-09-16 |
EP1790867A4 (en) | 2008-09-10 |
US20070253654A1 (en) | 2007-11-01 |
CN101027500A (zh) | 2007-08-29 |
JP4952996B2 (ja) | 2012-06-13 |
EP1790867A1 (en) | 2007-05-30 |
EP1790867B9 (en) | 2012-02-15 |
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