JP2020169676A - ラックバー及びステアリング装置 - Google Patents
ラックバー及びステアリング装置 Download PDFInfo
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- JP2020169676A JP2020169676A JP2019070882A JP2019070882A JP2020169676A JP 2020169676 A JP2020169676 A JP 2020169676A JP 2019070882 A JP2019070882 A JP 2019070882A JP 2019070882 A JP2019070882 A JP 2019070882A JP 2020169676 A JP2020169676 A JP 2020169676A
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- rack
- rack bar
- tooth
- bar
- teeth
- 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.)
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- 238000009751 slip forming Methods 0.000 claims abstract description 4
- 210000004513 dentition Anatomy 0.000 claims description 26
- 230000036346 tooth eruption Effects 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 18
- 230000006698 induction Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 17
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 229910000734 martensite Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
- B62D3/126—Steering gears mechanical of rack-and-pinion type characterised by the rack
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
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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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
-
- 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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/26—Racks
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
-
- 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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H2055/325—Friction members characterized by roughness or hardness of friction surface
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Transportation (AREA)
- Combustion & Propulsion (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Gears, Cams (AREA)
- Heat Treatment Of Articles (AREA)
- Transmission Devices (AREA)
Abstract
Description
本発明の一実施形態のラックバーを備えるステアリング装置の概略構成について説明する。ステアリング装置としては、電動モータがコラムシャフトに動力を付与するコラムアシストタイプのアシスト機構を備えるラックアンドピニオン式電動パワーステアリング装置や、電動モータがピニオンシャフトに動力を付与するピニオンアシストタイプのアシスト機構を備えるラックアンドピニオン式電動パワーステアリング装置を適用できる。
本実施形態のラックバー11は、ギヤ比が一定であるコンスタントギアレシオのラックバーや、ラック歯の諸元をラックバーの軸線方向位置によって異ならせるバリアブルギヤレシオのラックバーに適用可能である。ここでは、コンスタントギアレシオのラックバーを例にあげる。
次に、ラックバー11の製造方法について説明する。切削装置に鋼材でなる中実の軸部材111Rをセットし、軸部材11Rの一端面にタイロッド12に連結するためのメネジ113を切削加工する(図7のステップS1)。そして、プレス装置に切削加工が完了した軸部材11Rをセットし、軸部材11Rの外周面にラック歯列112をプレス加工する(図7のステップS2)。
Claims (4)
- ピニオン歯と噛み合う複数のラック歯を有するラック歯列を備え、少なくとも前記ラック歯列の形成された部位が中実のラックバーであって、
前記ラック歯列の周方向全域に連続に形成された硬化層と、
前記硬化層の内側に形成され前記硬化層より低硬度である中央部と、
を備え、
前記ラックバーを軸心方向に見たときの前記硬化層の深さは、前記ラック歯の歯底、前記歯底に対し前記ラックバーにおける側面、前記歯底に対し前記ラックバーにおける背面の順に大きくなるように形成される、ラックバー。 - 前記硬化層は、前記ラック歯列の周方向全域を誘導加熱することで形成される、請求項1に記載のラックバー。
- 前記ラックバーは、車両のステアリング装置に用いられ、
前記ラックバーのラック径は、前記車両の要求仕様に対応する基準ラックバーの基準ラック径よりも小さく、且つ、前記ラックバーの軸心に対する前記ラック歯の歯底の位置は、前記基準ラックバーの軸心に対する基準ラック歯の歯底の位置よりも前記ラックバーの軸心方向へ変位しているように形成される、請求項1又は2に記載のラックバー。 - ハウジングと、
前記ハウジングに軸線方向に移動可能に支持され、車両の車輪に連接される請求項1−3の何れか一項に記載のラックバーと、
前記ハウジングに軸回りに回転可能に支持されて前記ラックバーの前記ラック歯列と噛み合わされ、前記車両のステアリングに連接されるピニオンシャフトと、
を備える、ステアリング装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019070882A JP7306027B2 (ja) | 2019-04-02 | 2019-04-02 | ラックバー及びステアリング装置 |
US16/833,907 US11781633B2 (en) | 2019-04-02 | 2020-03-30 | Rack bar and steering apparatus |
EP20167067.6A EP3718856B1 (en) | 2019-04-02 | 2020-03-31 | Rack bar and steering apparatus |
CN202010242628.8A CN111791941A (zh) | 2019-04-02 | 2020-03-31 | 齿条杆和转向装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019070882A JP7306027B2 (ja) | 2019-04-02 | 2019-04-02 | ラックバー及びステアリング装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2020169676A true JP2020169676A (ja) | 2020-10-15 |
JP7306027B2 JP7306027B2 (ja) | 2023-07-11 |
Family
ID=70110072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019070882A Active JP7306027B2 (ja) | 2019-04-02 | 2019-04-02 | ラックバー及びステアリング装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US11781633B2 (ja) |
EP (1) | EP3718856B1 (ja) |
JP (1) | JP7306027B2 (ja) |
CN (1) | CN111791941A (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115158441A (zh) * | 2022-07-19 | 2022-10-11 | 江西五十铃汽车有限公司 | 一种新型齿轮齿条转向器 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57193446U (ja) * | 1981-06-03 | 1982-12-08 | ||
JPH11270657A (ja) * | 1998-03-20 | 1999-10-05 | Toyoda Mach Works Ltd | ラック軸 |
JP2014133929A (ja) * | 2013-01-11 | 2014-07-24 | Miyaden Co Ltd | ラックバーの高周波焼入装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62178471A (ja) | 1986-01-31 | 1987-08-05 | Yamada Seisakusho:Kk | 操向装置用ラツク軸 |
US5473960A (en) | 1993-03-14 | 1995-12-12 | Kabushiki Kaisha Yamada Seisakusho | Steering rack shaft and method of manufacturing the same |
JP2912521B2 (ja) | 1993-03-14 | 1999-06-28 | 株式会社山田製作所 | ステアリングラック軸 |
JP4311984B2 (ja) * | 2003-06-02 | 2009-08-12 | 株式会社ジェイテクト | ラックバー並びにこれを用いるステアリング装置及び電動パワーステアリング装置 |
JP5532952B2 (ja) * | 2010-01-21 | 2014-06-25 | 株式会社ジェイテクト | ラックアンドピニオン機構及びステアリング装置 |
WO2017038681A1 (ja) * | 2015-09-03 | 2017-03-09 | 日本精工株式会社 | ラック軸及びその製造方法 |
JP6628398B2 (ja) | 2015-09-15 | 2020-01-08 | 株式会社ミヤデン | ステアリング用ラックバーの通電加熱装置 |
CN105296719A (zh) * | 2015-09-29 | 2016-02-03 | 宫电高周波设备(上海)有限公司 | 用于转向的齿条的通电加热装置 |
-
2019
- 2019-04-02 JP JP2019070882A patent/JP7306027B2/ja active Active
-
2020
- 2020-03-30 US US16/833,907 patent/US11781633B2/en active Active
- 2020-03-31 EP EP20167067.6A patent/EP3718856B1/en active Active
- 2020-03-31 CN CN202010242628.8A patent/CN111791941A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57193446U (ja) * | 1981-06-03 | 1982-12-08 | ||
JPH11270657A (ja) * | 1998-03-20 | 1999-10-05 | Toyoda Mach Works Ltd | ラック軸 |
JP2014133929A (ja) * | 2013-01-11 | 2014-07-24 | Miyaden Co Ltd | ラックバーの高周波焼入装置 |
Also Published As
Publication number | Publication date |
---|---|
EP3718856A1 (en) | 2020-10-07 |
CN111791941A (zh) | 2020-10-20 |
US20200318722A1 (en) | 2020-10-08 |
JP7306027B2 (ja) | 2023-07-11 |
EP3718856B1 (en) | 2022-08-10 |
US11781633B2 (en) | 2023-10-10 |
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