WO2011129509A1 - Appareil de direction électrique - Google Patents

Appareil de direction électrique Download PDF

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Publication number
WO2011129509A1
WO2011129509A1 PCT/KR2010/008288 KR2010008288W WO2011129509A1 WO 2011129509 A1 WO2011129509 A1 WO 2011129509A1 KR 2010008288 W KR2010008288 W KR 2010008288W WO 2011129509 A1 WO2011129509 A1 WO 2011129509A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
output
bearing
input
electric power
Prior art date
Application number
PCT/KR2010/008288
Other languages
English (en)
Korean (ko)
Inventor
홍성종
송강석
박병선
Original Assignee
남양공업㈜
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 남양공업㈜ filed Critical 남양공업㈜
Priority to CN201080061563.1A priority Critical patent/CN102712335B/zh
Publication of WO2011129509A1 publication Critical patent/WO2011129509A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0409—Electric motor acting on the steering column
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel

Definitions

  • the present invention relates to an electric power steering apparatus having a worm gear preload mechanism. More particularly, the present invention relates to an electric power steering system capable of reducing assembly lattices resulting from the worm gear portion and the lattices of the worm gear, and improving assembly performance. It is related to the steering device.
  • the power steering system is applied to the vehicle to ensure the stability of the steering state.
  • a hydraulic power steering system HPS
  • HPS hydraulic power steering system
  • EPS environmentally friendly electric power steering system
  • the electric power steering system drives the motor in the ECU according to the vehicle's driving conditions detected by the vehicle speed sensor and the steering torque sensor to give a light and comfortable steering feeling at low speeds, and provides a good steering stability at high speeds. In the emergency situation, the steering is performed quickly to provide the driver with optimal steering conditions.
  • C-EPS column type
  • P-EPS pinion type
  • R-EPS rack type
  • the rack-type (R-EPS) steering system of the electric power steering system has an obtuse or acute inclination at one side of the rack housing, and the pinion gear of the electric motor installed is engaged with the driven gear of the ball nut supporting the outer peripheral part of the rack bar.
  • the ball nut is rotated by the driving force of the electric motor, and the rack bar is slid left and right by this rotational force, so that an assist force due to steering of the handle is generated.
  • the axial distance between the gear accommodating side of the housing and the output shaft of the drive motor is set to the same distance with respect to the axial distance including the engagement radius of each of the worm and the worm gear.
  • Such additional backlash acts as a major factor that impairs reliability and technical level, such as imparting discomfort to the driver due to the rattle sound when the vehicle travels in a bad lane.
  • the present invention has been made to solve the above problems, the object of the present invention is to solve the above-mentioned disadvantages of the prior art, to suppress the backlash, and without impairing the transmission performance of the auxiliary steering force, at the spline joint
  • the main technical problem is to provide an electric power steering apparatus having a simple configuration that can reduce the generated rattle sound.
  • a torque sensor for detecting the torque of the input torque shaft and the output torque shaft constituting the output shaft;
  • the sliding structure between the input torque shaft and the output torque shaft and the simple structure make it possible to significantly improve the assembly and torque sensing capability, and to help improve overall reliability.
  • the bearing on the side opposite to the drive motor is surrounded by a bearing support member surrounding the outer circumferential surface of the bearing,
  • the elastic ring member is coupled to the annular groove formed on the outer circumferential surface of the bearing support member,
  • the spherical body is configured to be in contact.
  • the spherical body is preferably selected from the rubber, urethane, carbon glass fiber, engineering plastics having damping properties are employed.
  • the through hole may be a slot formed long in the outer circumferential direction so that the spherical body can move the set distance along the outer circumferential surface.
  • the drive motor is mounted to the housing and generates an auxiliary steering drive force
  • the rotary shaft is supported by the motor side outer bearing installed in the housing, splined to the shaft of the drive motor, and the predetermined position of the housing It includes an output shaft for supporting shaft and transmitting steering force, and a reduction gear composed of a worm and a worm gear that are integrally coupled to the worm, which is integrally formed on the rotating shaft, to transmit the auxiliary steering force of the driving motor to the output shaft by using the worm gear.
  • the output shaft is composed of an input torque shaft and an output torque shaft coaxially integrated integrally with a torque sensor in the center, and on one outer peripheral surface facing the input torque shaft and the output torque shaft, Input the torque of the input and output torque shafts connected to the input and output rotors of the torque sensor to be measured and transmitted to the ECU. And an input engagement hole and an output engagement hole respectively engaged with the input engagement protrusion on the rotor side and the output engagement protrusion on the rotor side, respectively.
  • a spherical body and elasticity capable of one-way pressing the outer circumferential surface of a bearing as a part of a clearance compensation means on a worm side rotation shaft By providing the ring member, it is possible to compensate for the play caused by the wear of the worm shaft, and to have a very excellent effect of reducing noise such as rattle sound.
  • FIG. 1 is a perspective structural diagram showing an electric power steering apparatus according to an embodiment of the present invention.
  • FIG. 2 is a front structural diagram of the electric power steering apparatus of FIG. 1;
  • FIG. 3 is a longitudinal cross-sectional view taken along the line A-A of FIG.
  • FIG. 4 is a cross-sectional structural view partially cut along the line A-A of FIG.
  • FIG. 5 is an exploded perspective structural view showing only a rotating shaft excluding an output shaft and supporting elements supporting the rotating shaft in FIG. 4;
  • FIG. 6 is a longitudinal cross-sectional view taken along the line B-B of FIG.
  • FIG. 7 is an enlarged cross-sectional structural view showing an enlarged portion C of FIG.
  • FIGS. 1 and 6 are exploded perspective views illustrating an exploded view of the internal components of FIGS. 1 and 6;
  • FIG. 9 is a perspective illustration of the coalescing perspective of the components in FIG.
  • FIG. 10 is a longitudinal cross-sectional view taken along the line D-D of FIG. 9;
  • FIG. 11 is a vertical cross-sectional view illustrating only the output torque member and the input torque member of the coil shaft in FIG. 10;
  • FIG. 12 is an assembled perspective view showing only the coil shaft output torque member and the input torque member in FIG.
  • the drive motor (M) is mounted to the housing 10 and generates an auxiliary steering drive force, and the motor side and outer side bearings 20 and 30 installed in the housing 10
  • Rotation shaft 40 which is supported by the drive shaft, and is splined to the motor shaft of the drive motor M, an output shaft 50 for being axially supported at a predetermined position of the housing 10, and transmitting a steering force, and the rotation shaft 40
  • the rotation shaft 40 Including a reduction gear consisting of a worm 41 and a worm gear 43 to be engaged with the worm 41 and integrally formed on the), the auxiliary steering force of the drive motor (M) using the worm gear 43
  • FIG. 1 is a perspective structural diagram showing the overall configuration of an electric power steering apparatus according to an embodiment of the present invention.
  • the outer bearing 30 facing the drive motor M is configured to be surrounded by a bearing support member 60 surrounding the outer circumferential surface of the outer bearing 30.
  • the elastic ring member 70 having one side open is coupled to the annular groove 61 formed on the outer circumferential surface of the bearing support member 60.
  • the spherical body 80 is formed between the elastic ring member 70 and the outer circumferential surface of the outer bearing 30 through a through hole 61a formed on the outer circumferential side of the annular groove 61 of the bearing support member 60. Is configured to contact.
  • the spherical body 80 is selected from rubber, urethane, carbon glass fiber, and engineering plastic having damping properties.
  • the through hole 61a may adopt a structure in which the spherical body 80 is formed as a slot elongated in the direction along the outer circumferential surface such that the spherical body 80 can move a set distance along the outer circumferential surface.
  • the output shaft 50 is composed of an input torque shaft 51 and an output torque shaft 53 coupled coaxially integrally with a torque sensor 100 in the center.
  • the input engagement port 51a is formed continuously to the position corresponding to half of the input torque shaft 51. Because of this, it is possible to solve the assembly disadvantage that must be mounted inside the housing 10 in the state in which the torque sensor 100 and the output torque shaft 53 is combined. That is, since the input engagement hole 51a is recessed over the entire thick portion, which is half of the input torque shaft 51, the input engagement port 51a is pushed at once even if it is assembled after the fact, instead of being assembled integrally with the torque sensor 100. It will be possible to achieve a configuration that can be put into assembly.
  • the torque sensor 100 can be easily assembled by injecting the torque sensor 100 from one side of the input torque shaft 51.
  • the low risk of inflow of foreign substances and the assemblability can be further improved.
  • an output fastening protrusion 103 is formed in the center of the output rotor, and the output engagement hole 53a of the output torque shaft 53 is press-fitted to the output fastening protrusion 103 on the output rotor side.
  • an input fastening protrusion 101 on the input rotor side is formed at the center of the input rotor to insert and fix the input engaging holes 51a of the input torque shaft 51 to the input fastening protrusion 101 on the input rotor side. It is.
  • One side of the worm gear 43 is equipped with a torque sensor 100 connected to the worm gear 43 and the output torque shaft 53.
  • the torque sensor 100 measures the torque of the input torque shaft 51 and the output torque shaft 53 and transmits the torque to the ECU, thereby operating the driving motor in the ECU to provide steering assistance.
  • the torque sensor 100 includes an output rotor (not shown), an input rotor (not shown), and a cover 100a, and an output fastener 103 on the output rotor side is formed at the center of the output rotor.
  • the output torque shaft 53 is press-fitted to the output fastening protrusion 103 on the output rotor side.
  • the input fastening protrusion 101 is connected to the input torque shaft 51 at the center of the input rotor to connect the input torque shaft 51 to the input torque shaft 51 and the input fastening protrusion 101. It is structured.
  • the cover 100a encloses the output rotor and the input rotor, and the cover protects the output rotor and the input rotor while connecting the output rotor and the input rotor to an electronic control unit (aka, 'ECU'). do.
  • the flange 46a, 47a-equipped bush-type damping members 46, 47 having a cross-sectional shape of ' ⁇ ' shape so as to surround the inner ring and the both end surfaces of the motor side bearing 20 at the same time. ) Is assembled.
  • reference numerals 48 and 49 are steel rings for supporting the outermost sides of the bushing damping members 46 and 47, and the damping members 46 having vibration and shock absorbing functions on both sides of the motor side bearing 20 are provided. 47) is fixed to both sides for fixing base.
  • the flanges 46a and 47a-the damping members 46 and 47 are compressed at the inner ring and both outer end portions of the motor-side bearing 20, so that the flanges 46a and 47a-the damping members 46 and 47 are all around the radial displacement of the rotating shaft 40. Generates uniform repulsive force. For this reason, when there is no load, it floats with respect to the inner ring of the motor side bearing 20 of the rotating shaft in which the worm 41 was formed, and the inner ring of the rotating shaft 40 and the motor side bearing 20 do not contact each other. It will remain in a state that does not.
  • damping members 46 and 47 which have vibration and shock absorption functions on both sides of the motor side bearing 20 are made of rubber or urethane.
  • the input torque shaft 51 and the output torque shaft 53 are formed by the sleeve 90 of the plastic material so that the sleeve 90 of the input torque shaft 51 can reduce the initial friction torque and achieve the desired rotational performance.
  • the sleeve 90 of the engineering plastic material that can be assembled without the use of lubricating oil to reduce the initial friction torque during rotation and ensure a smooth rotational performance, Stable output performance of the torque sensor can be achieved.
  • the resilient ring member 70 while wrapping the outer peripheral portion of the outer bearing 30 for supporting the shaft end of the worm 41, at the same time spherical to the outer peripheral surface of the bearing 30
  • the sieve 80 is always brought into contact so that the axial and radial play of the worm 41 can be flexibly absorbed or compensated.
  • the electric motor driving command is calculated by the ECU according to the driving conditions of the vehicle detected by the vehicle speed sensor and the steering torque sensor 100 to drive the electric motor at an appropriate rotational speed.
  • the rotational force of the electric motor is transmitted to the steering shaft while being decelerated at an appropriate rotational speed while passing through a reduction gear including a worm 41 and a worm gear 43 to assist the steering wheel steering force of the driver.
  • the elastic ring member 70 and the spherical body 80 is positioned to surround the outer circumferential surface of the outer bearing 30 supporting the worm 41, which is a reduction gear, thereby providing a reduction gear due to frequent friction.
  • this makes it possible to regulate the maximum of the noise (rattle noise) including the rattle sound due to irregular contact between the gear teeth.
  • the preload is applied to the outer bearing 30 on the side supporting the outer portion of the rotating shaft 40, whereby the worm 41 and the worm gear 43 are always By coming into contact with each other, the play of this part is severely regulated.
  • the torque sensor 100 for detecting the torque of the input torque shaft 51 and the output torque shaft 53 constituting the output shaft 50 and the input torque shaft 51 and the output torque shaft 53 of a simple configuration Through the connection structure, it is possible to greatly improve the assemblability and the sense of torque sensing, which can help to improve the overall reliability.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Power Steering Mechanism (AREA)

Abstract

L'invention concerne un appareil de direction électrique, en particulier un appareil mettant en oeuvre un engrenage à vis sans fin pour transférer une force de direction assistée d'un moteur d'entraînement à un arbre de sortie. Cet appareil comprend : un palier du côté opposé au moteur d'entraînement, entouré au niveau de son périmètre externe par un élément de support de palier ; un élément bague élastique couplé à une fente annulaire définie dans le périmètre externe de l'élément de support de palier ; des corps sphériques configurés pour venir en contact mutuel entre les périmètres externes de l'élément bague élastique et du palier, par un trou traversant défini sur un côté du périmètre externe de l'élément de support de palier ; et un mécanisme de préchargement d'engrenage à vis sans fin conçu pour réduire l'écart formé au niveau d'une partie de l'engrenage à vis sans fin et diminuer les bruits de cliquetis causés par l'écart tout en facilitant l'assemblage.
PCT/KR2010/008288 2010-04-12 2010-11-23 Appareil de direction électrique WO2011129509A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201080061563.1A CN102712335B (zh) 2010-04-12 2010-11-23 电动动力转向装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0033238 2010-04-12
KR20100033238A KR101204306B1 (ko) 2010-04-12 2010-04-12 전동 파워스티어링 장치

Publications (1)

Publication Number Publication Date
WO2011129509A1 true WO2011129509A1 (fr) 2011-10-20

Family

ID=44798853

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2010/008288 WO2011129509A1 (fr) 2010-04-12 2010-11-23 Appareil de direction électrique

Country Status (3)

Country Link
KR (1) KR101204306B1 (fr)
CN (1) CN102712335B (fr)
WO (1) WO2011129509A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113541442A (zh) * 2021-08-19 2021-10-22 王金龙 一种磁能动力系统

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103786779B (zh) * 2012-10-26 2016-04-27 宁波如意股份有限公司 一种双组脉冲输出电转向器
US9168949B2 (en) * 2013-04-18 2015-10-27 Ford Global Technologies, Llc Steering system clatter mitigation
KR102101664B1 (ko) 2015-12-31 2020-04-27 남양넥스모 주식회사 전동식 파워 스티어링장치의 베어링 홀더 구조체
CN106741140B (zh) * 2016-12-20 2022-12-16 博世华域转向系统有限公司 一种电动助力驱动单元的减震降噪结构
KR101957349B1 (ko) * 2016-12-29 2019-06-19 이래에이엠에스 주식회사 전동식 파워 스티어링 시스템
DE102017205516A1 (de) * 2017-03-31 2018-10-04 Ford Global Technologies, Llc Servolenkung für ein Kraftfahrzeug sowie Kraftfahrzeug
KR20190137378A (ko) 2018-06-01 2019-12-11 주식회사 우진산전 전동식 조향 시스템의 웜샤프트 구조체
CN110492246B (zh) * 2019-08-13 2021-05-28 中信科移动通信技术有限公司 基站天线电下倾角调节传动机构及基站天线

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002195898A (ja) * 2000-12-27 2002-07-10 Koyo Seiko Co Ltd トルクセンサおよび電動パワーステアリング装置のフェールセーフ機構
JP2004045151A (ja) * 2002-07-10 2004-02-12 Koyo Seiko Co Ltd トルクセンサ
JP2005219708A (ja) * 2004-02-09 2005-08-18 Nsk Ltd 電動パワーステアリング装置
JP2007131144A (ja) * 2005-11-10 2007-05-31 Nsk Ltd 電動式パワーステアリング装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002195898A (ja) * 2000-12-27 2002-07-10 Koyo Seiko Co Ltd トルクセンサおよび電動パワーステアリング装置のフェールセーフ機構
JP2004045151A (ja) * 2002-07-10 2004-02-12 Koyo Seiko Co Ltd トルクセンサ
JP2005219708A (ja) * 2004-02-09 2005-08-18 Nsk Ltd 電動パワーステアリング装置
JP2007131144A (ja) * 2005-11-10 2007-05-31 Nsk Ltd 電動式パワーステアリング装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113541442A (zh) * 2021-08-19 2021-10-22 王金龙 一种磁能动力系统

Also Published As

Publication number Publication date
CN102712335B (zh) 2015-04-01
CN102712335A (zh) 2012-10-03
KR20110113907A (ko) 2011-10-19
KR101204306B1 (ko) 2012-11-23

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