JP2016205561A - 複層摺動部材及びそれを用いた自動車のラックピニオン式舵取装置 - Google Patents
複層摺動部材及びそれを用いた自動車のラックピニオン式舵取装置 Download PDFInfo
- Publication number
- JP2016205561A JP2016205561A JP2015089884A JP2015089884A JP2016205561A JP 2016205561 A JP2016205561 A JP 2016205561A JP 2015089884 A JP2015089884 A JP 2015089884A JP 2015089884 A JP2015089884 A JP 2015089884A JP 2016205561 A JP2016205561 A JP 2016205561A
- Authority
- JP
- Japan
- Prior art keywords
- rack
- sliding member
- pinion
- multilayer sliding
- metal
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 claims description 67
- 239000002184 metal Substances 0.000 claims description 67
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- 230000002093 peripheral effect Effects 0.000 claims description 10
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- 125000003118 aryl group Chemical group 0.000 claims description 8
- 229920002530 polyetherether ketone Polymers 0.000 claims description 8
- 229920001721 polyimide Polymers 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 229920006015 heat resistant resin Polymers 0.000 claims description 7
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- 125000005341 metaphosphate group Chemical group 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
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- 230000000295 complement effect Effects 0.000 claims description 4
- 229920002312 polyamide-imide Polymers 0.000 claims description 4
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- MRVHOJHOBHYHQL-UHFFFAOYSA-M lithium metaphosphate Chemical compound [Li+].[O-]P(=O)=O MRVHOJHOBHYHQL-UHFFFAOYSA-M 0.000 claims description 3
- RHJYKEDKMHDZBL-UHFFFAOYSA-L metaphosphoric acid (hpo3), magnesium salt Chemical compound [Mg+2].[O-]P(=O)=O.[O-]P(=O)=O RHJYKEDKMHDZBL-UHFFFAOYSA-L 0.000 claims description 3
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- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
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- 239000011575 calcium Substances 0.000 description 1
- FUFJGUQYACFECW-UHFFFAOYSA-L calcium hydrogenphosphate Chemical compound [Ca+2].OP([O-])([O-])=O FUFJGUQYACFECW-UHFFFAOYSA-L 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
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- 230000001771 impaired effect Effects 0.000 description 1
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- 239000004761 kevlar Substances 0.000 description 1
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical group [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
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- 239000012791 sliding layer Substances 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/12—Steering gears mechanical of rack-and-pinion type
-
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- B32—LAYERED PRODUCTS
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/16—Layered products comprising a layer of metal next to a particulate layer
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- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
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- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
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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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
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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
- F16C33/02—Parts of sliding-contact bearings
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- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/122—Multilayer structures of sleeves, washers or liners
- F16C33/125—Details of bearing layers, i.e. the lining
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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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
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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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
- F16C33/206—Multilayer structures, e.g. sleeves comprising a plastic lining with three layers
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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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
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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
- F16H—GEARING
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
- F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/041—Coatings or solid lubricants, e.g. antiseize layers or pastes
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- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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Abstract
【解決手段】中空部2を有したアルミニウム又はアルミニウム合金製のギアケース3と、ギアケース3にころがり軸受4及び5を介して回転自在に支持されたステアリング軸6と、ステアリング軸6の軸端部に一体的に設けられていると共に中空部2においてステアリング軸6を介してギヤケース3に回転自在に支持されたピニオン7と、ピニオン7に噛み合うラック歯8が形成されたラックバー9と、ギアケース3の中空部2内に配されていると共にラックバー9を摺動自在に支持するラックガイド10と、ラックガイド10をラックバー9に向って押圧するコイルばねからなるばね11とを具備している。
【選択図】図1
Description
鋼板等からなる裏金31の一方の表面に形成された多孔質金属焼結層32の表面に湿潤性が付与された合成樹脂組成物を散布供給し、ローラで圧延して多孔質金属焼結層32の孔隙中に合成樹脂組成物を充填するとともに多孔質金属焼結層32の表面に一様な厚さの合成樹脂組成物からなる層を形成する。この工程において、合成樹脂組成物からなる層の厚さは、最終製品において必要とされる被覆層33の厚さの2〜2.2倍とされる。多孔質金属焼結層32の孔隙中への合成樹脂組成物の充填は、本工程でその大部分が進行する。
工程(a)で処理された多孔質金属焼結層32及び合成樹脂組成物からなる層をもった裏金31を200〜250℃の温度に加熱された乾燥炉内で数分間保持することにより、石油系溶剤を除去し、その後、乾燥した合成樹脂組成物の層をローラによって所定の厚さになるように29.4〜58.8MPa(300〜600kgf/cm2)の加圧下で加圧ローラ処理する。
工程(b)で処理された多孔質金属焼結層32及び合成樹脂組成物の層をもった裏金31を加熱炉に導入して360〜380℃の温度で数分ないし10数分間加熱して焼成を行なった後、炉から取り出し、再度ローラ処理によって寸法のバラツキを調整する。
工程(c)で寸法調整された多孔質金属焼結層32及び合成樹脂組成物の層をもった裏金31を冷却(空冷又は自然冷却)し、その後、必要に応じて裏金31のうねりなどを矯正するため、矯正ローラ処理を行ない、所望の複層摺動部材30とする。
メタリン酸金属塩としてメタリン酸マグネシウム、メタリン酸アルミニウム、メタリン酸カルシウム及びメタリン酸リチウムのうちの一つのメタリン酸金属塩と、PTFEとしてファインパウダー用PTFE(ダイキン工業社製の「ポリフロン(登録商標)F201(商品名)」)との合成樹脂組成物を表2に示す割合でヘンシェルミキサー内に供給して撹拌混合して得られた混合物100質量部に対して、石油系溶剤として脂肪族系溶剤とナフテン系溶剤との混合溶剤(エクソン化学社製の「エクソール(商品名)」)20質量部を配合し、PTFEの室温転移点以下の温度(15℃)で混合し、湿潤性を有する合成樹脂組成物を得た。
実施例1〜7の合成樹脂組成物に対し、追加成分として耐熱性樹脂としての熱硬化性ポリイミド樹脂(チバガイギー社製の「ビスマレイミド(商品名)」)、芳香族ポリアミド樹脂(帝人社製の「コーネックス(商品名)」)、芳香族ポリエステル樹脂(住友化学社製の「スミカスーパーE101S(商品名)」)及びポリエーテルエーテルケトン樹脂(PEEK)(ビクトレックス社製の「PEEK450PF(商品名)」)を配合して表3及び表4に示す合成樹脂組成物を作製し、実施例1〜7と同様の方法により、半径10.0mm、長さ20.0mm、厚さ1.0mmの半円筒状の複層摺動部材試験片を得た。
表5に示すように、実施例1〜18と同じPTFE80質量%と鉛粉末20質量%とをヘンシェルミキサー内に供給して撹拌混合して得られた混合物100質量部に対して、実施例1〜18と同じ石油系溶剤20質量部を配合し、PTFEの室温転移点以下の温度(15℃)で混合し、合成樹脂組成物を得た。ついで、実施例1〜18と同様の方法で、半径10.0mm、長さ20.0mm、厚さ1.0mmの半円筒状の複層摺動部材試験片を得た。
表5に示すように、実施例1〜18と同じPTFE70質量%とリン酸塩としてリン酸水素カルシウム10質量%と鉛粉末20質量%とをヘンシェルミキサー内に供給して撹拌混合して得られた混合物100質量部に対して、実施例1〜18と同じ石油系溶剤20質量部を配合し、PTFEの室温転移点以下の温度(15℃)で混合し、合成樹脂組成物を得た。ついで、実施例1〜18と同様の方法で、半径10.0mm、長さ20.0mm、厚さ1.0mmの半円筒状の複層摺動部材試験片を得た。
表5に示すように、実施例1〜18と同じPTFE50質量%と硫酸バリウムとして簸性硫酸バリウム15質量%と珪酸マグネシウムとしてSiO2/MgOが2.2(質量比)の重質珪酸マグネシウム15質量%と鉛粉末20質量%とをヘンシェルミキサー内に供給して撹拌混合して得られた混合物100質量部に対して、実施例1〜18と同じ石油系溶剤20質量部を配合し、PTFEの室温転移点以下の温度(15℃)で混合し、合成樹脂組成物を得た。ついで、実施例1〜18と同様の方法で、半径10.0mm、長さ20.0mm、厚さ1.0mmの半円筒状の複層摺動部材試験片を得た。
表1に記載の条件で摩擦係数及び摩耗量を測定した。その試験結果を表2〜表5に示し、摩擦係数については、試験終了時(20時間経過時)での静摩擦係数の値(上欄)及び動摩擦係数の値(下欄)を示し、摩耗量については、試験時間(20時間)終了後の摺動面の寸法変化量で示した。
すべり速度 3m/min
荷重 200kgf
時間 20時間
ストローク 150mm
潤滑 試験前に摺動面にグリース(協同油脂社製の「モリホワイト(商品名)」)塗布
相手材 高炭素クロム軸受鋼(SUJ2:JISG4805)
3 ギアケース
6 ステアリング軸
7 ピニオン
9 ラックバー
10 ラックガイド
11 ばね
19 ラックガイド基体
20 摺動板片
30 複層摺動部材
31 裏金
32 多孔質金属焼結層
33 被覆層
Claims (6)
- 裏金と、この裏金の一方の表面に形成された多孔質金属焼結層と、この多孔質金属焼結層の孔隙及び表面に充填被着されていると共に四フッ化エチレン樹脂に加えてメタリン酸金属塩を10〜40質量%含んでいる被覆層とを具備した複層摺動部材。
- メタリン酸金属塩は、メタリン酸アルミニウム、メタリン酸カルシウム、メタリン酸リチウム及びメタリン酸マグネシウムのうちの少なくとも一つを含んでいる請求項1に記載の複層摺動部材。
- 被覆層は、耐熱性樹脂を3〜20質量%更に含んでいる請求項1又は2に記載の複層摺動部材。
- 耐熱性樹脂は、ポリイミド樹脂、ポリアミドイミド樹脂、芳香族ポリアミド樹脂、芳香族ポリエステル樹脂及びポリエーテルエーテルケトン樹脂のうちの少なくとも一つを含んでいる請求項3に記載の複層摺動部材。
- ギヤケースと、このギヤケースに回転自在に支持されたピニオンと、このピニオンに噛み合うラック歯が形成されたラックバーと、このラックバーを摺動自在に支持するラックガイドと、このラックガイドをラックバーに向って押圧するばねとを具備したラックピニオン式舵取装置において、ラックガイドは、ギヤケースの筒状の内周面に摺動自在に接する筒状の外周面を有したラックガイド基体と、このラックガイド基体に裏金で固着された請求項1から4のいずれか一項に記載の複層摺動部材とを具備しており、複層摺動部材の被覆層は、ラックバーの外周面に摺動自在に接触する凹面を有しているラックピニオン式舵取装置。
- ラックガイド基体は、複層摺動部材の裏金が着座した円弧状凹面と、この円弧状凹面の底部中央に形成された円形の孔とを備えており、複層摺動部材は、前記凹面及びラックガイド基体の円弧状凹面に相補的な形状をもった凸面を有した本体と、この凸面の底部の中央において本体に一体的に形成されていると共にラックガイド基体の孔に嵌入された円筒状の中空突出部とを備えている請求項5に記載のラックピニオン式舵取装置。
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WO2019187348A1 (ja) * | 2018-03-26 | 2019-10-03 | オイレス工業株式会社 | 複層摺動部材 |
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JP2019183968A (ja) * | 2018-04-10 | 2019-10-24 | オイレス工業株式会社 | 複層摺動部材 |
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