[특허]Electric power steering apparatus

[미국특허] Electric power steering apparatus 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B62D-005/04
출원번호	US-0724217 (2007-03-15)
등록번호	US-7413052 (2008-08-19)
우선권정보	JP-2002-020346(2002-01-29); JP-2002-020347(2002-01-29); JP-2002-040327(2002-02-18); JP-2002-044911(2002-02-21)
발명자 / 주소	Sasaki,Hiroto Saruwatari,Takehiro Nakamura,Kensaku Miyata,Atsuya Nagamatsu,Kazuaki Oka,Kunihiro Murataka,Hiroshi Hironaka,Akihiro
출원인 / 주소	Jtekt Corporation Gates Unitta Asia Company
대리인 / 주소	Rabin & Berdo, PC
인용정보	피인용 횟수 : 8 인용 특허 : 28

초록 ▼

An electric power steering apparatus includes a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of a steering shaft extending toward the right and left sides of a vehicle. The speed reducing mechanism includes an input pulley driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley to each other, and a belt tension adjuster.

대표청구항 ▼

What is claimed is: 1. An electric power steering apparatus comprising an electric motor for producing a steering assist force, further comprising: a speed reducing mechanism for decelerating a rotation of a rotatable shaft in the electric motor; and a converting mechanism for converting an output rotation of the speed reducing mechanism into an axial movement of a steering shaft extending toward right and left sides of a vehicle, the speed reducing mechanism comprising an input pulley rotatably coupled to an input shaft driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley, and a mechanism for adjusting a tension of the belt, the mechanism for adjusting the tension including a mechanism for changing a center-to-center distance between the input pulley and the output pulley, the mechanism for changing the center-to-center distance including: a guiding mechanism for relatively guiding a first housing for holding the input pulley and a second housing for holding the steering shaft in a predetermined guiding direction in which the center-to-center distance can be changed, the guiding mechanism comprising: a connection housing comprising: a peripheral wall substantially parallel to the input shaft; a first guided section comprising a first annular flange extending away from both the peripheral wall and the input shaft; a first end wall extending away from the peripheral wall and extending towards the input shaft; an extension section substantially parallel to the input shaft and extending away from the first end wall, the extension section comprising a first aperture defined therein; a second end wall substantially parallel to the first end wall and extending away from a front end of the extension section and extending towards the input shaft; and a cylindrical section extending away from the second end wall having a substantially stepped-shape that defines a second guided section, the cylindrical section is rotatably coupled to a second end of the input shaft using a bearing; and a speed reducing mechanism housing integrally formed with the second housing, the speed reducing mechanism comprising: a first guiding section comprising a second annular flange that facilitates guiding the first guided section; a second guiding section comprising a third end wall extending substantially perpendicularly away from the first guiding section, the third wall comprising a recess defined therein that facilitates guiding the second guided section of the cylindrical section; and a peripheral wall extending substantially perpendicularly away from the third end wall, the peripheral wall comprising a second aperture defined therein that receives a screw that is threadably coupled to the extension section using the first aperture such that the screw facilitates driving the first and second housings in the predetermined guiding direction, which facilitates adjusting the center-to-center distance and the tension of the belt. 2. The electric power steering apparatus according to claim 1, wherein the predetermined guiding direction includes a direction perpendicular to the center lines of the input pulley and the output pulley, wherein the guiding mechanism comprising: a connection housing comprising: a first diameter portion comprising a first guided section comprising a first pair of annular flanges such that the first diameter portion is rotatably coupled to a first end of the input shaft using a first bearing; and a second diameter portion that is smaller than the first diameter portion, wherein the first diameter portion is positioned closer to a front end of the connection housing than the second diameter portion; a support housing having a substantially cylindrical-shape and comprising a second guided section comprising a second pair of annular flanges and a bottom such that a second end of the input shaft is rotatably coupled to the support housing using a second bearing; and a speed reducing mechanism housing integrally formed with the second housing, the speed reducing mechanism housing comprising: a first holding section comprising a first aperture defined therein and having a substantially groove-shaped cross-section to facilitate holding the connection housing; a second holding section comprising a second aperture defined therein and having a substantially groove-shaped cross-section to facilitate holding the support housing; a first guiding section comprising a first pair of walls that facilitate guiding the first guided section; a second guiding section comprising a second pair of walls that facilitate guiding the second guided section; a first screw threadably coupled to the first holding section using the first aperture such that a front end of the first screw contacts the connection housing to facilitate adjusting the tension of the belt; and a second screw threadably coupled to the second holding section using the second aperture such that a front end of the second screw contacts the support housing to facilitate adjusting the tension of the belt.

이 특허에 인용된 특허 (28) 인용/피인용 타임라인 분석

Menjak, Ratko; Card, James Myrl; Menjak, Damir, Actuator for active front wheel steering system.
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Dixon Jay J. (R.R. 1 Coal City IL 60416), Alternator belt tension adjustor.
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Suat Ali Ozsoylu ; William F Feriend ; Michael R. Pyrett, Apparatus and method for steering a vehicle.
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Mannbro Rolf (Jarnmyntsgatan 1 Gteborg SEX S-414 79), Arrangement for rotator units.
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Sakakibara Shiro (Toyokawa JPX) Hasebe Masahiro (Anjo JPX) Hattori Masashi (Anjo JPX) Ohara Shigekazu (Anjo JPX), Belt driven continuously variable transmission.
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Quintus James G., Belt tensioner with flexible armplate.
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Johnson Carl R. (Minneapolis MN) Pareja Ramon (Edina MN), Belt tensioning apparatus for belt/pulley drive system.
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Suzuki Takeshi,JPX, Belt-drive mechanism.
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Band Gerhard (Oberndorf DEX) Broghammer Heinz (Zimmern DEX), Coordinate measuring machine.
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Menjak, Zdravko; Card, James Myrl; Menjak, Ratko, Electric power assisted rack and pinion system.
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Shimizu, Yasuo; Watanabe, Katsuji; Yoneda, Atsuhiko, Electric power steering apparatus.
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Shimizu Yasuo (Saitama JPX), Electric power steering system for vehicles.
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Metcalf ; Wilbur F., Electronic tachograph.
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Ahlrich Willard K. (321 N. Pine Lake Road Stuart FL 33494), Exhaust fume treatment apparatus.
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Byung-Yun Choi KR, Gear ratio variable type steering device.
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von Hagen Ingo (Krefeld DEX) Heinz Gerd (Merrbusch-Strmp DEX) Ppperling Rolf K. (Mlheim DEX) Schlerkmann Hubertus (Roetgen DEX), Method of improving the resistance of articles of steel to H-induced stress-corrosion cracking.
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Shimizu Yasuo (Tochigi JPX), Motor-driven power booster.
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Odai Nobuhiro (Sakado JPX), Oil-operated tensioner for toothed belt.
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Dobberpuhl Dale R. (Horicon WI) Kruel Edward C. (Horicon WI), Power take-off shaft stabilizer unit.
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Hood James A., Semi-automatic tensioner for a belt drive system.
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Sheppard Peter H. (P.O. Box 459 Hanover PA 17331-0459), Slot forming apparatus.
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Redmon Larry (Fort Wayne IN), Speed changing device.
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Budaker, Martin; Kogel, Walter, Steering device for a vehicle.
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Shimizu Yasuo (Saitama JPX), Steering system for vehicles.
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Marek Frankowski CA; Jorma J. Lehtovaara CA; Jacek Stepniak CA; Klaus K. Bytzek CA; Witold Gajewski CA, Tensioner.
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Cho Nakwon (3604 Kranbrook La. Knoxville TN 37921), Tensioner for a power transmission belt or the like.
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DeNijs Jan F.C. (Wakefield MA) Lindner Matthias (Bad Nauheim DEX), Transmission for converting rotary motion into linear motion.
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Onogi,Kenkichi, Variable-speed control system for a transmission.
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이 특허를 인용한 특허 (8) 인용/피인용 타임라인 분석

Heo, Nam Hwan; Kim, Dong Sik, Electric power steering apparatus.
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Yamamoto, Yasuharu, Electric power steering apparatus and assembly method therefor.
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Bareis,Helmut; Budaker,Martin; Hetzel,Oliver; Hauck,Michael, Power-steering system.
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Jung, Dae-Hee, Pulley structure of belt type electric power steering gear.
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Cymbal, William D.; vonMatt, Niklaus A.; Beyerlein, Jeffrey E.; Andres, John M.; Rutkiewicz, Jason T.; Diffin, Daniel J.; Ross, Kevin C., Steering column assist system.
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Mehl, Nicholas J.; Beyerlein, Jeffrey E.; Rutkiewicz, Jason T., Steering column assist system.
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Limpibunterng, Theerawat; Kojo, Takahiro, Vehicular steering control apparatus and control method thereof.
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Limpibunterng, Theerawat; Kojo, Takahiro, Vehicular variable steering ratio control device and control method thereof.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

[미국특허] Electric power steering apparatus 원문보기

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[미국특허] Electric power steering apparatus 원문보기

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이 특허에 인용된 특허 (28) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (8) 인용/피인용 타임라인 분석

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