KR102101664B1 - Structure of bearing holder for electric power steering system - Google Patents

Structure of bearing holder for electric power steering system Download PDF

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Publication number
KR102101664B1
KR102101664B1 KR1020150190531A KR20150190531A KR102101664B1 KR 102101664 B1 KR102101664 B1 KR 102101664B1 KR 1020150190531 A KR1020150190531 A KR 1020150190531A KR 20150190531 A KR20150190531 A KR 20150190531A KR 102101664 B1 KR102101664 B1 KR 102101664B1
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South Korea
Prior art keywords
bearing holder
fitting
electric power
power steering
elastic member
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KR1020150190531A
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Korean (ko)
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KR20170080899A (en
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홍성종
윤형준
이정남
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남양넥스모 주식회사
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    • 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
    • B62D5/0442—Conversion of rotational into longitudinal movement
    • B62D5/0445—Screw drives
    • B62D5/0448—Ball nuts
    • 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
    • F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
    • 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
    • B62D5/0442—Conversion of rotational into longitudinal movement
    • B62D5/0454—Worm gears
    • 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
    • B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
    • B62D5/046—Controlling the motor
    • B62D5/0472—Controlling the motor for damping vibrations
    • 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
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/06—Elastic or yielding bearings or bearing supports, for exclusively rotary movement by means of parts of rubber or like materials
    • F16C27/066—Ball or roller bearings
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
    • 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
    • F16H1/166—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 with members rotating around axes on the worm or worm-wheel
    • 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
    • F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/20—Land vehicles
    • F16C2326/24—Steering systems, e.g. steering rods or columns
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/61—Toothed gear systems, e.g. support of pinion shafts
    • 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
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H2057/0213—Support of worm gear shafts
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H57/022—Adjustment of gear shafts or bearings
    • F16H2057/0222—Lateral adjustment
    • 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
    • F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
    • F16H2057/126—Self-adjusting during operation, e.g. by a spring
    • F16H2057/127—Self-adjusting during operation, e.g. by a spring using springs
    • 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
    • F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
    • F16H55/24—Special devices for taking up backlash

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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

본 발명은 웜샤프트의 수직방향 변위를 보상하도록 베어링 홀더측에 탄성부재를 용이하게 결합시킬 수 있도록 함과 아울러, 결합된 탄성부재의 장력을 임의로 조절하여 웜샤프트의 축 방향 변위 발생시 충격을 흡수하여 소음발생을 억제시킬 수 있도록 그 구조가 개선된 전동식 파워 스티어링장치의 베어링 홀더 구조체에 관한 것이다.The present invention enables the elastic member to be easily coupled to the bearing holder side to compensate for the vertical displacement of the worm shaft, and also adjusts the tension of the coupled elastic member arbitrarily to absorb shock when an axial displacement of the worm shaft occurs. The present invention relates to a bearing holder structure of an electric power steering device whose structure is improved to suppress noise generation.

Description

전동식 파워 스티어링장치의 베어링 홀더 구조체{Structure of bearing holder for electric power steering system}Structure of bearing holder for electric power steering system

본 발명은 전동식 파워 스티어링 장치의 베어링 홀더 구조체에 관한 것으로, 특히 웜샤프트의 단부에 결합된 볼베어링을 지지하는 베어링 홀더의 래틀을 방지하도록 볼베어링 측에 탄성부재의 가압 탄성력을 전달함과 아울러, 탄성부재의 장력을 임의로 조절할 수 있도록 함으로써, 볼베어링과 베어링 홀더의 접촉소음을 절감할 수 있도록 그 구조가 개선된 전동식 파워 스티어링장치의 베어링 홀더 구조체에 관한 것이다.The present invention relates to a bearing holder structure of an electric power steering device, and in particular to transmit the pressurized elastic force of the elastic member to the ball bearing side to prevent the rattle of the bearing holder supporting the ball bearing coupled to the end of the worm shaft, as well as the elastic member It relates to a bearing holder structure of an electric power steering device having an improved structure so as to reduce the contact noise between the ball bearing and the bearing holder by allowing the tension to be arbitrarily adjusted.

일반적으로, 차량에는 조향상태의 안정성을 보장하기 위해 파워 스티어링 시스템이 적용되는바, 이와 같은 파워 스티어링 장치는 기존에는 유압을 이용한 유압식 파워 스티어링 장치(HPS; Hydraulic Power Steering System)가 차량에 널리 이용되었으나, 최근에는 유압을 사용하던 기존의 방식과는 달리 모터의 회전력을 이용하여 운전자의 조향력을 쉽게 해주며, 환경친화적인 전동식 파워 스티어링 장치(EPS; Electrical Power Steering System)의 설치가 증가되는 추세이다.In general, a power steering system is applied to a vehicle to ensure the stability of a steering state. As such a power steering device, a hydraulic power steering system (HPS) using hydraulic pressure has been widely used in a vehicle. In recent years, unlike conventional methods that used hydraulics, the steering force of the driver is easily made by using the rotational force of the motor, and the installation of an environmentally friendly electric power steering system (EPS) is increasing.

상기 전동식 파워 스티어링 장치는, 차속센서 및 조향토크센서 등에서 감지한 차량의 운행조건에 따라 ECU에서 모터를 구동시켜 저속 운행시에는 가볍고 편안한 조향감을 부여하고, 고속 운행시에는 무거운 조향감과 더불어 양호한 방향 안정성을 부여하며, 비상 상황에서는 급속한 조향이 이루어지도록 하여 운전자에게 최적의 조향 조건을 제공하게 된다.The electric power steering device drives the motor in the ECU according to the driving conditions of the vehicle detected by the vehicle speed sensor and the steering torque sensor, thereby providing a light and comfortable steering feeling at low speed operation, and a good steering stability with heavy steering feeling at high speed operation. In order to provide an optimal steering condition to the driver, rapid steering is performed in an emergency situation.

한편, 이와 같은 전동식 파워 스티어링 장치는 그 설치상태에 따라 칼럼타입(C-EPS)과, 피니언 타입(P-EPS) 및 랙 타입(R-EPS)으로 세분된다.Meanwhile, such an electric power steering apparatus is divided into a column type (C-EPS), a pinion type (P-EPS), and a rack type (R-EPS) according to the installation state.

상기 전동식 파워 스티어링 장치 중 상기 랙 타입(R-EPS) 스티어링 장치는, 랙 하우징 일측에 둔각 또는 예각의 기울기를 지니며 설치된 전동 모터의 피니언 기어가 랙바 일측 외주부를 지지하고 있는 볼 너트의 종동기어와 치합된 상태에서 전동모터의 구동력에 의해 볼 너트를 회전시키게 되고, 이 회전력에 의해 랙바를 좌,우 슬라 이딩시킴으로써, 핸들 조타에 따른 조력(助力)이 발생되도록 하는 것이다.The rack-type (R-EPS) steering device among the electric power steering devices includes a follower gear of a ball nut in which a pinion gear of an electric motor installed with an obtuse angle or an acute angle on one side of the rack housing supports the outer circumference of the rack bar. In the engaged state, the ball nut is rotated by the driving force of the electric motor, and by sliding the rack bar left and right by this rotational force, the force according to steering of the steering wheel is generated.

통상, 전동 파워 스티어링 장치의 웜기어 감속기구에서는, 웜과 웜기어의 각각의 맞물림 반경을 포함한 축거리에 대하여, 하우징의 기어 수납측과 구동모터의 출력축과의 축거리가 동거리로 설정되어 있다.Normally, in the worm gear reduction mechanism of the electric power steering apparatus, the axial distance between the gear storage 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 respective engagement radius of the worm and the worm gear.

이 때문에, 설정 백래시에 더하여 각각의 가공상 불균일 등에 기인하는 추가 백래시가 종종 발생하게 된다.For this reason, in addition to the set backlash, additional backlash due to unevenness in each processing often occurs.

이러한 추가적인 백래시는, 차량이 노면상태가 불량한 노면을 주행할 때, 이로 인한 래틀음에 의한 불쾌감을 운전자에게 부여하는 등 신뢰성이나 기술적 레벨을 손상시키는 주요인으로 작용하고 있다.This additional backlash acts as a major factor that impairs reliability or technical level, such as imparting discomfort to the driver due to the rattle sound when the vehicle is driving on a road surface having poor road conditions.

이에 대한 대책으로서, 기어의 정밀도를 높여, 백래시를 아주 작게 설정하거나, 또는 웜과 그 축받침용 베어링 사이에 탄성체 등을 설치하여 진동을 흡수하는 등의 방법이 채용되고 있는 실정이다.As a countermeasure against this, methods such as increasing the precision of the gear, setting the backlash to a very small level, or absorbing vibration by installing an elastic body or the like between the worm and its bearing for bearing are employed.

이처럼 종래에는, 기어의 마모 등에 의하여 웜과 웜기어의 축심 사이 거리가 변동할 경우, 웜의 미소 변위에 의하여 예압력이 변화되어, 안정적인 예압력을 확보하는 것이 곤란하게 되는 등의 단점을 내포하고 있었다.As described above, in the past, when the distance between the worm and the shaft center of the worm gear fluctuates due to gear wear or the like, the preload is changed by the micro displacement of the worm, and it has disadvantages such as difficulty in securing a stable preload. .

이를 개선하기 위한 종래 전동 파워스티어링 장치의 선행기술로는 한국 등록특허공보 제10-1204306호 "전동 파워스티어링 장치"(등록일자 : 2012.11.19)에 개시된 바와 같이, 하우징에 장착되고 보조 조타 구동력을 발생하는 구동모터와, 상기 하우징에 설치되는 모터측 외곽측베어링에 의해 지지되고, 상기 구동모터의 축에 스플라인 결합되는 회전축과, 상기 하우징의 소정위치에 축지지되고 조타력을 전달하기 위한 출력축과, 상기 회전축에 일체로 형성되는 웜과 상기 웜과 상호 맞물림 결합되도록 상기 웜기어로 이루어진 감속기구를 포함하여, 상기 구동모터의 보조 조타력을 상기 웜기어를 이용하여 상기 출력축에 전달하는 전동 파워스티어링 장치에 있어서, 상기 구동모터와 대향하는 측의 베어링은 이 베어링의 외주면을 감싸는 베어링 지지부재에 의해 둘러싸이며, 상기 베어링 지지부재의 외주면에 형성된 환상홈에 탄력성 링부재가 결합되고, 상기 탄력성 링부재와 상기 베어링의 외주면 사이에는, 상기 베어링 지지부재의 외주면 일측에 형성된 관통공을 통해, 구형체가 맞접촉하도록 구성된 것이다.As a prior art of a conventional electric power steering device for improving this, as disclosed in Korean Patent Registration No. 10-1204306 "Electric Power Steering Device" (Registration Date: 2012.11.19), it is mounted on a housing and provides auxiliary steering driving force. The generated driving motor, a rotating shaft supported by a motor-side outer bearing installed in the housing, spline coupled to the shaft of the driving motor, and an output shaft for supporting the steering force at a predetermined position in the housing and transmitting a steering force , A reduction gear consisting of a worm gear integrally engaged with the worm and the worm integrally formed on the rotating shaft, to an electric power steering device for transmitting the auxiliary steering force of the drive motor to the output shaft using the worm gear In, the bearing on the side opposite to the drive motor is provided on a bearing support member surrounding the outer circumferential surface of the bearing. Surrounded by the sun, an elastic ring member is coupled to an annular groove formed on the outer circumferential surface of the bearing support member, and between the elastic ring member and the outer circumferential surface of the bearing, through a through hole formed on one side of the outer circumferential surface of the bearing support member, a spherical body It is configured to make contact.

종래 전동 파워스티어링 장치의 다른 선행기술로는 한국 공개특허공보 제10-2013-0071257호 "소음저감형 전동식 조향장치" (공개일자: 2013.06.28)에 개시된 바와 같이, 스티어링축의 외측에 고정되는 웜휠기어와, 웜휠기어에 맞물려 돌아가는 웜샤프트와, 웜샤프트에 결합되어 회전시 발생하는 마찰을 감소시키는 베어링부재와, 베어링부재의 외측 둘레를 감싸는 내측부재와, 내측부재의 둘레를 따라 설치되는 외측부재 및 내측부재와 외측부재의 사이에 설치되어 충격을 흡수하는 탄성부재를 구비한 것이다.As another prior art of the conventional electric power steering device, as disclosed in Korean Patent Application Publication No. 10-2013-0071257 "Noise Reduction Type Electric Steering System" (published date: 2013.06.28), the worm wheel fixed to the outside of the steering shaft Gears, a worm shaft engaged with a worm wheel gear, a bearing member coupled to the worm shaft to reduce friction generated during rotation, an inner member surrounding the outer circumference of the bearing member, and an outer member installed along the circumference of the inner member And an elastic member installed between the inner member and the outer member to absorb shock.

기존 웜샤프트는 단부를 지지하는 베어링 홀더에 볼부재와 탄성부재가 구비되어 있으나, 웜샤프트에 변위가 발생할 경우 볼부재가 홀더의 내측면과 접촉되면서 접촉소음을 발생시키는 단점을 갖는다.The existing worm shaft has a ball member and an elastic member in a bearing holder supporting an end, but when displacement occurs in the worm shaft, the ball member contacts the inner surface of the holder and has a disadvantage of generating contact noise.

그런데, 기존 베어링 홀더의 외주연 둘레에 자체 탄성을 갖는 판스프링 등의 탄성부재를 끼워서 결합시키기가 어려울 뿐만 아니라, 탄성부재의 장력을 임의로 조절할 수 없는 단점이 있었다.However, it is difficult to fit an elastic member such as a plate spring having its own elasticity around the outer periphery of the existing bearing holder, and it is difficult to arbitrarily adjust the tension of the elastic member.

한국 등록특허공보 제10-1204306호 "전동 파워스티어링 장치"(등록일자 : 2012.11.19)Korean Registered Patent Publication No. 10-1204306 "Electric Power Steering Device" (Registration Date: 2012.11.19) 한국 공개특허공보 제10-2013-0071257호 "소음저감형 전동식 조향장치" (공개일자: 2013.06.28)Korea Patent Application Publication No. 10-2013-0071257 "Noise reduction type electric steering device" (published date: 2013.06.28)

본 발명은 상기한 제반문제점을 감안하여 이를 해결하고자 창출된 것으로, 그 목적은 웜샤프트의 수직방향 변위를 보상하도록 베어링 홀더측에 탄성부재를 용이하게 결합시킬 수 있도록 함과 아울러, 결합된 탄성부재의 장력을 임의로 조절하여 웜샤프트의 축 방향 변위 발생시 충격을 흡수하여 소음발생을 억제시킬 수 있도록 그 구조가 개선된 전동식 파워 스티어링장치의 베어링 홀더 구조체를 제공하는 데 있다.The present invention was created to solve the above problems in consideration of the above-mentioned problems, and its purpose is to allow the elastic member to be easily coupled to the bearing holder side to compensate for the vertical displacement of the worm shaft, and also to the combined elastic member. It is to provide a bearing holder structure of an electric power steering apparatus having an improved structure so that noise can be suppressed by absorbing shock when an axial displacement of the worm shaft occurs by arbitrarily adjusting the tension of the worm shaft.

상기한 목적을 달성하기 위한 본 발명은 전동 파워 스티어링장치용 웜샤프트의 단부에 배치되는 볼베어링을 감싸도록 결합되고, 상부에 끼움홈부가 돌출 형성되며, 하우징에 결합수단을 매개로 착탈 가능하게 결합되는 베어링 홀더와; 일단이 상기 베어링 홀더의 끼움홈부 내에 진입되어 끼움 결합되고, 타단이 일단으로부터 절곡되어 상기 볼베어링의 외측에 탄성 가압력을 제공하는 탄성부재;를 구비한 것을 특징으로 한다.The present invention for achieving the above object is coupled to surround the ball bearing disposed at the end of the worm shaft for the electric power steering device, the fitting groove is formed protruding on the top, is detachably coupled to the housing through a coupling means A bearing holder; It characterized in that it is provided with; one end is entered into the fitting groove portion of the bearing holder is fitted, the other end is bent from one end to provide an elastic pressing force to the outside of the ball bearing.

상기 결합수단은 상기 베어링 홀더가 수용되는 상기 하우징의 단부 내주면 둘레에 형성되는 걸림홈과, 상기 베어링 홀더의 외주연 둘레에 형성되고 자체 탄성을 갖도록 분할 형성되고 단부가 상기 걸림홈 내에 록킹 결합되는 복수의 지지편으로 구성된 것이다.The coupling means is a plurality of engaging grooves formed around the inner circumferential surface of the end of the housing in which the bearing holder is accommodated, and formed around the outer circumference of the bearing holder and formed to have its own elasticity, and the ends being locked in the engaging grooves It consists of support pieces.

상기 베어링 홀더의 끼움홈부에 끼움 결합되는 탄성부재의 일단에 하중을 제공하여 상기 탄성부재의 장력을 조절하기 위한 장력조절수단을 더 구비한다.It is further provided with a tension adjusting means for adjusting the tension of the elastic member by providing a load to one end of the elastic member that is fitted to the fitting groove of the bearing holder.

상기 장력조절수단은 상기 끼움홈부의 상부면에 연통되도록 천공 형성되는 결합공과, 상기 결합공에 체결되어 회전동작시 승강동작되며 하강동작시 상기 탄성부재의 일단에 하중을 제공하는 조절볼트와, 상기 조절볼트에 체결되어 풀림을 방지하기 위한 너트부재로 구성된 것이다.The tension adjusting means includes a coupling hole formed to be perforated to communicate with the upper surface of the fitting groove portion, an adjustment bolt fastened to the coupling hole to provide a load on one end of the elastic member during a rotation operation and a descending operation. It is composed of a nut member for fastening to the adjustment bolt to prevent loosening.

상기 하우징은 단부 일측에 상기 베어링 홀더의 끼움홈부가 진입 가능하도록 절개된 절개홈이 형성된 것이다.The housing is formed with an incision groove that is cut so that the fitting groove portion of the bearing holder may enter the end side.

상기 탄성부재는 일단이 상기 끼움홈부 내에 진입되고 좌,우 양측에 끼움편이 각각 형성된 끼움부와, 상기 끼움부의 타단 측에 사선 방향으로 끼움부의 일단측으로 연장되도록 절곡되고 단부측에 상측으로 절곡된 탄성편이 형성된 절곡부로 구성된 것이다.The elastic member has an elasticity that is bent so that one end enters the fitting groove part and the fitting pieces are formed on both left and right sides, and extends toward one end of the fitting part in a diagonal direction on the other end of the fitting part and is bent upward on the end side. It is composed of a bent portion with a side formed.

본 발명은 탄성부재의 끼움부를 끼움홈부의 끼움홈 내로 수평 방향으로 진입시킴에 따라 베어링 홀더와 탄성부재를 간편하게 결합시킬 수 있으며, 볼베어링에 전달되는 탄성부재의 가압 지지력을 장력조절수단을 이용하여 가변 조절할 수 있으므로 웜샤프트로부터 전달되는 볼베어링의 수직 변위를 용이하게 억제시켜 작동소음을 줄일 수 있는 효과를 갖는다.The present invention can be easily coupled to the bearing holder and the elastic member as the fitting member of the elastic member enters the fitting groove in the horizontal direction into the fitting groove, and the pressure supporting force of the elastic member transmitted to the ball bearing is variable by using a tension adjusting means Since it can be adjusted, the vertical displacement of the ball bearing transmitted from the worm shaft can be easily suppressed to reduce the operating noise.

도 1은 본 발명 베어링 홀더가 적용된 전동식 파워 스티어링장치를 나타낸 사시도.
도 2는 본 발명에 따른 베어링 홀더와 탄성부재의 분해 사시도.
도 3은 도 2의 결합 후 상태를 보인 사시도.
도 4는 본 발명 볼베어링과 베어링 홀더의 결합상태도.
도 5a 및 도 5b는 본 발명 탄성부재의 장력 조절 전,후 상태를 나타낸 단면도.
도 6은 본 발명 하우징에 베어링 홀더가 결합된 상태를 보인 절개 단면도.
도 7a 및 도 7b는 본 발명 장력조절수단의 장력 조절 전,후 상태를 사용상태도.1 is a perspective view showing an electric power steering device to which the bearing holder of the present invention is applied.
Figure 2 is an exploded perspective view of the bearing holder and the elastic member according to the present invention.
Figure 3 is a perspective view showing a state after the combination of Figure 2;
Figure 4 is a combined state of the present invention ball bearing and bearing holder.
5a and 5b is a cross-sectional view showing a state before and after the tension adjustment of the elastic member of the present invention.
Figure 6 is a sectional view showing a state in which the bearing holder is coupled to the housing of the present invention.
7a and 7b is a state diagram showing the state before and after the tension adjustment of the tension control means of the present invention.

본 발명에 따른 전동식 파워 스티어링장치의 베어링 홀더 구조체는, 도 1 내지 도 7을 참조하여 설명하면, 외주면에 웜휠과 기어 맞물림 결합되는 기어부가 마련되는 웜샤프트(10)와, 상기 웜샤프트(10)의 좌측 단부와 우측 단부에 각각 결합되는 볼베어링(50)과, 일측이 개구된 중공(205)이 형성되어 상기 좌측 단부에 결합된 볼베어링(50)의 외측을 감싸도록 결합되고 상부에 끼움홈부(210)가 돌출 형성되며 하우징(100)에 결합수단을 매개로 착탈 가능하게 결합되는 베어링 홀더(200)와, 일단이 상기 베어링 홀더(200)의 끼움홈부(210) 내에 진입되어 끼움 결합되고, 타단이 일단으로부터 절곡되어 상기 볼베어링(50)의 외측에 탄성 가압력을 제공하는 탄성부재(300)로 구성된다.If the bearing holder structure of the electric power steering apparatus according to the present invention is described with reference to FIGS. 1 to 7, a worm shaft 10 and a worm shaft 10 provided with a gear part coupled to a worm wheel and a gear on an outer circumferential surface, and the worm shaft 10 The ball bearing 50 coupled to the left end and the right end of each, and the hollow 205 with one side open are formed to be coupled to surround the outside of the ball bearing 50 coupled to the left end and fit into the upper groove part 210 ) Is formed protruding and the bearing holder 200 is detachably coupled to the housing 100 via a coupling means, and one end enters into the fitting groove portion 210 of the bearing holder 200 to be fitted and the other end is It is composed of an elastic member 300 that is bent from one end and provides elastic pressing force to the outside of the ball bearing 50.

더 상세히 설명하면, 볼베어링(50)은 웜샤프트(10)의 좌측과 우측 단부에 각각 결합되는 볼베어링(50)이 구비되며, 상기 볼베어링(50)은 웜샤프트(10)의 회전을 지지하게 된다.In more detail, the ball bearing 50 is provided with a ball bearing 50 that is coupled to the left and right ends of the worm shaft 10, respectively, and the ball bearing 50 supports rotation of the worm shaft 10.

도 1을 참조하면, 상기 하우징(100)은 상부 내부에 웜샤프트(10)가 수평 방향으로 수용되고, 상기 웜샤프트(10)의 직교방향으로 웜휠이 수용되는 구조를 갖는다.Referring to FIG. 1, the housing 100 has a structure in which a worm shaft 10 is accommodated in a horizontal direction inside an upper portion, and a worm wheel is accommodated in an orthogonal direction of the worm shaft 10.

상기 웜샤프트(10)가 수용되는 하우징(100)의 단부 상측에는 베어링 홀더(200)의 끼움홈부(210)가 진입 가능하도록 일측이 절개된 절개홈(120)이 형성된다.On the upper end of the housing 100 in which the worm shaft 10 is accommodated, an incision groove 120 in which one side is cut is formed to allow the fitting groove 210 of the bearing holder 200 to enter.

도 2를 참조하면, 상기 베어링 홀더(200)는 끼움홈부(210)의 내부에 상기 탄성부재(300)의 일단이 끼워지며 중공(205)의 상측에 연통되도록 형성된 끼움홈(215)이 형성된다.Referring to FIG. 2, the bearing holder 200 has one end of the elastic member 300 fitted inside the fitting groove portion 210 and a fitting groove 215 formed to communicate with the upper side of the hollow 205 is formed. .

상기 탄성부재(300)는 자체 탄성을 갖는 판스프링으로서, 일단이 상기 끼움홈부(210)의 끼움홈(215) 내에 진입되고 좌,우 양측에 끼움편(315)이 각각 형성된 끼움부(310)와, 상기 끼움부(310)의 타단 측에 사선 방향으로 끼움부(310)의 일단측으로 연장되도록 절곡되고 단부측에 상측으로 절곡된 탄성편(325)이 형성된 절곡부(320)로 구성된다.The elastic member 300 is a plate spring having its own elasticity, one end of which enters the fitting groove 215 of the fitting groove 210, and the fitting pieces 310 are formed on both left and right sides, respectively. And, it is composed of a bent portion 320 formed with an elastic piece 325 bent to extend toward one end of the fitting portion 310 in an oblique direction on the other end side of the fitting portion 310 and bent upward on the end side.

또한, 끼움편(315)은 끼움부(310)의 좌,우 양측에서 하측방향으로 경사진 각도로 연장 형성된다.In addition, the fitting piece 315 is formed to extend at an angle inclined downward from both the left and right sides of the fitting portion 310.

즉, 탄성부재(300)는 일단측에 끼움홈부(210) 내로 진입되는 끼움부(310)가 형성되고, 타단측에 상기 볼베어링(50)과 접촉되는 절곡부(320)로 구성된 것이다. That is, the elastic member 300 is formed of a fitting part 310 that enters into the fitting groove part 210 on one side, and a bent part 320 that contacts the ball bearing 50 on the other end.

도 3을 참조하면, 탄성부재(300)와 베어링 홀더(200)의 결합시 끼움부(310)는 끼움홈부(210)의 끼움홈(215) 내로 진입되고, 절곡부(320)는 중공(205) 내에 수용되는 볼베어링(50)의 외측에 접촉된다. Referring to FIG. 3, when the elastic member 300 and the bearing holder 200 are coupled, the fitting part 310 enters into the fitting groove 215 of the fitting groove part 210, and the bending part 320 is hollow 205 ) Is in contact with the outside of the ball bearing 50 accommodated.

상기 결합수단은 상기 베어링 홀더(200)가 수용되는 상기 하우징(100)의 단부 내주면 둘레에 형성되는 걸림홈(110)과, 상기 베어링 홀더(200)의 외주연 둘레에 형성되고 자체 탄성을 갖도록 분할 형성되고 단부가 상기 걸림홈(110) 내에 록킹 결합되는 복수의 지지편(220)으로 구성된다.The coupling means is formed around the outer circumferential edge of the bearing holder 200 and the locking groove 110 formed around the inner circumferential surface of the end of the housing 100, and is divided to have its own elasticity It is formed and consists of a plurality of support pieces 220 whose ends are locked in the locking groove 110.

각각의 지지편(220)은 단부에 상기 걸림홈(110) 내에 록킹 결합되도록 외측으로 돌출된 걸림돌기(222)가 형성된다.Each support piece 220 is formed with a locking protrusion 222 protruding outward so as to be locked in the locking groove 110 at the end.

상기 베어링 홀더(200)의 끼움홈부(210)에 끼움 결합되는 탄성부재(300)의 일단에 하중을 제공하여 상기 탄성부재(300)의 장력을 조절하기 위한 장력조절수단(400)을 더 구비한다.A tension adjusting means 400 is further provided to adjust the tension of the elastic member 300 by providing a load at one end of the elastic member 300 that is fitted to the fitting groove portion 210 of the bearing holder 200. .

도 3 및 도 4를 참조하면, 상기 장력조절수단(400)은 상기 끼움홈부(210)의 상부면에 천공되어 상기 끼움홈(215)과 연통되도록 형성되는 결합공(410)과, 상기 결합공(410)에 체결되어 회전동작시 승강동작되며 하강동작시 상기 탄성부재(300)의 일단에 하중을 제공하는 조절볼트(420)와, 상기 조절볼트(420)에 체결되어 풀림을 방지하기 위한 너트부재(430)로 구성된 것이다.3 and 4, the tension adjusting means 400 is perforated on the upper surface of the fitting groove 210, the engaging hole 410 is formed to communicate with the fitting groove 215, and the engaging hole It is fastened to the 410, the lifting operation during the rotating operation and the adjusting bolt 420 providing a load to one end of the elastic member 300 during the falling operation, and the nut for fastening the adjusting bolt 420 to prevent loosening. It is composed of a member 430.

또한, 장력조절수단(400)은 도 5a에 도시된 바와 같이, 조절볼트(420)가 탄성부재(300)의 일단측 끼움부(310)에 접촉됨에 따라 탄성부재(300)의 절곡부(320)가 볼베어링(50)측에 접촉되면서 볼베어링(50)을 가압 지지하게 되고, 도 5b에 도시된 바와 같이 조절볼트(420)의 하강동작시 탄성부재(300)의 절곡부(320)가 볼베어링(50)의 외측에 더 많이 접촉되면서 앞의 경우보다 더 많은 가압력으로 볼베어링(50)을 지지하여 볼베어링(50)의 수직 방향 변위를 제한하는 스톱퍼 기능을 수행하게 된다.In addition, the tension adjusting means 400, as shown in Figure 5a, the adjustment bolt 420, the elastic member 300, the contact portion 310 of the elastic member 300 as the bending portion 320 of the elastic member 300 ) Is in contact with the ball bearing 50 side, the ball bearing 50 is pressurized and supported, and as shown in FIG. 5B, the bending part 320 of the elastic member 300 when the adjusting bolt 420 descends, the ball bearing ( As it contacts more to the outside of 50), it supports the ball bearing 50 with more pressing force than in the previous case, thereby performing a stopper function to limit the vertical displacement of the ball bearing 50.

이러한 구성을 갖는 본 발명은 먼저 탄성부재(300)를 베어링 홀더(200)에 조립시키고, 탄성부재(300)가 조립된 베어링 홀더(200)를 결합수단을 이용하여 하우징(100)의 단부에 조립함에 따라, 볼베어링(50)이 결합된 웜샤프트(10)의 단부가 베어링 홀더(200)의 중공(205) 내에 수용되도록 조립된다.The present invention having such a configuration first assembles the elastic member 300 to the bearing holder 200, and assembles the bearing holder 200, to which the elastic member 300 is assembled, to the end of the housing 100 using coupling means. Accordingly, the end of the worm shaft 10 to which the ball bearing 50 is coupled is assembled to be accommodated in the hollow 205 of the bearing holder 200.

이때, 탄성부재(300)와 베어링 홀더(200)의 조립은 탄성부재(300)의 일단인 끼움부(310)를 끼움홈부(210)의 외측에서 수평방향으로 끼움홈(215) 내로 진입시키면, 끼움부(310)의 좌,우 양측에 형성된 끼움편(315)이 끼움홈(215)의 내부로 진입되어 탄성부재(300)의 일단이 고정되고, 탄성부재(300)의 타단인 절곡부(320)가 중공(205) 내에 수용된 볼베어링(50)의 외측면에 접촉되어 탄성부재(300)의 하중을 볼베어링(50)측에 전달하여 볼베어링(50)의 수직방향 변위를 제한하게 된다.At this time, the assembly of the elastic member 300 and the bearing holder 200 is entered into the fitting groove 215 in the horizontal direction from the outside of the fitting groove portion 210, the fitting portion 310, which is one end of the elastic member 300, The fitting pieces 315 formed on both the left and right sides of the fitting part 310 enter the inside of the fitting groove 215 so that one end of the elastic member 300 is fixed, and the bending part which is the other end of the elastic member 300 ( 320) is in contact with the outer surface of the ball bearing 50 accommodated in the hollow 205 to transfer the load of the elastic member 300 to the ball bearing 50 side to limit the vertical displacement of the ball bearing 50.

또한, 상기한 결합수단은 도 6에 도시된 바와 같이, 베어링 홀더(200)의 외주연 둘레에 각각 이격되게 형성된 지지편(220)의 걸림돌기(222)가 하우징(100)의 단부 내주면 둘레에 형성된 걸림홈(110)에 록킹 결합되면서 하우징(100)에 대한 베어링 홀더(200)의 외부 이탈이 방지된다.In addition, the coupling means is as shown in Figure 6, the locking projections 222 of the support pieces 220 formed to be spaced apart from each other around the outer periphery of the bearing holder 200 around the inner circumferential surface of the end of the housing 100 Locking coupling to the formed locking groove 110 prevents the external departure of the bearing holder 200 relative to the housing 100.

이때, 지지편(220)은 자체 탄성력에 의해 웜샤프트(10)로부터 축 방향 하중이 전달되더라도 걸림홈(110)과의 록킹 결합으로 베어링 홀더(200)의 이탈을 방지하는 기능을 수행하게 된다.At this time, even if the axial load is transmitted from the worm shaft 10 by its own elastic force, the support piece 220 performs a function of preventing the bearing holder 200 from being detached by locking engagement with the locking groove 110.

이후에, 장력조절수단(400)은 조절볼트(420)가 결합공(410)에 대해 승강동작되므로, 조절볼트(420)에 조임력을 제공하여 하강시킬 경우 조절볼트(420)의 하단부가 접촉된 탄성부재(300)에 하방향 가압 하중을 제공함에 따라, 볼베어링(50)측에 전달되는 탄성부재(300)의 하중을 가변 조절할 수 있다.Thereafter, the tension adjusting means 400, the adjusting bolt 420 is moved up and down with respect to the coupling hole 410, so when the descending by providing a tightening force to the adjusting bolt 420, the lower end of the adjusting bolt 420 is contacted As the downward pressure load is applied to the elastic member 300, the load of the elastic member 300 transmitted to the ball bearing 50 side can be variably adjusted.

즉, 본 발명의 장력조절수단(400)은 도 7a에 도시된 바와 같이, 조절볼트(420)의 단부가 단순히 탄성부재(300)의 끼움부(310) 상면에 접촉된 상태일 경우 탄성부재(300)의 자체 탄성 하중이 절곡부(320)를 통해 웜샤프트(10)의 단부에 결합된 볼베어링(50)에 전달되지만, 도 7b에서와 같이 조절볼트(420)의 하강동작으로 탄성부재(300)의 끼움부(310) 상측에 하방향 가압력을 제공함에 따라 절곡부(320)와 볼베어링(50)의 접촉면적이 커지게 되면서 볼베어링(50)측에 더 많은 하중을 제공하여 볼베어링(50)의 수직방향 변위를 예방하여 웜샤프트(10)를 통해 볼베어링(50)에 전달되는 수직방향 유동을 억제할 수 있다.That is, the tension adjusting means 400 of the present invention, as shown in Figure 7a, the end of the adjustment bolt 420 is simply an elastic member (300) in the state of contact with the upper surface of the fitting portion 310 of the elastic member ( The self-elastic load of 300) is transmitted to the ball bearing 50 coupled to the end of the worm shaft 10 through the bent part 320, but as shown in FIG. 7B, the elastic member 300 is moved by the downward movement of the adjustment bolt 420. ) As the contact area between the bent portion 320 and the ball bearing 50 is increased as the downward force is applied to the upper side of the fitting portion 310, the load of the ball bearing 50 is provided by providing more load to the ball bearing 50 side. By preventing vertical displacement, it is possible to suppress the vertical flow transmitted to the ball bearing 50 through the worm shaft 10.

따라서, 본 발명은 탄성부재(300)의 끼움부(310)를 끼움홈부(210)의 끼움홈(215) 내로 수평 방향으로 진입시킴에 따라 베어링 홀더(200)와 탄성부재(300)를 간편하게 결합시킬 수 있으며, 볼베어링(50)에 전달되는 탄성부재(300)의 가압 지지력을 장력조절수단(400)을 이용하여 가변 조절할 수 있으므로 웜샤프트(10)로부터 전달되는 볼베어링(50)의 수직 변위를 용이하게 억제시켜 작동소음을 줄일 수 있는 효과를 갖는다.Therefore, according to the present invention, the bearing holder 200 and the elastic member 300 are easily combined as the fitting part 310 of the elastic member 300 enters into the fitting groove 215 of the fitting groove 210 in the horizontal direction. It is possible to, and the pressure supporting force of the elastic member 300 transmitted to the ball bearing 50 can be variably adjusted using the tension adjusting means 400 to facilitate the vertical displacement of the ball bearing 50 transmitted from the worm shaft 10. It has the effect of reducing the operation noise.

상기한 본 발명은 웜샤프트(10)의 단부에 결합된 볼베어링(50)의 수직방향 변위를 보상하도록 한 기술적 사상을 갖는 것으로, 본 발명이 지니는 개념과 범위를 벗어나지 않는 범위내에서 얼마든지 변형 실시가 가능할 것이다.The present invention described above has a technical idea to compensate for the vertical displacement of the ball bearing 50 coupled to the end of the worm shaft 10, and any modification within the scope not departing from the concept and scope of the present invention Will be possible.

10 : 웜샤프트 50 : 볼베어링
100 : 하우징 110 : 걸림홈
120 : 절개홈 200 : 베어링 홀더
205 : 중공 210 : 끼움홈부
215 : 끼움홈 220 : 지지편
222 : 걸림돌기 300 : 탄성부재
310 : 끼움부 315 : 끼움편
320 : 절곡부 325 : 탄성편
400 : 장력조절수단 410 : 결합공
420 : 조절볼트 430 : 너트부재10: Warm shaft 50: Ball bearing
100: housing 110: locking groove
120: incision groove 200: bearing holder
205: hollow 210: fitting groove
215: fitting groove 220: support piece
222: locking projection 300: elastic member
310: fitting part 315: fitting part
320: bent portion 325: elastic piece
400: tension control means 410: coupling hole
420: adjustment bolt 430: nut member

Claims (6)

전동 파워 스티어링장치용 웜샤프트(10)의 단부에 배치되는 볼베어링(50)을 감싸도록 결합되고, 상부에 끼움홈부(210)가 돌출 형성되며, 웜샤프트(10)가 수용되는 하우징(100)에 결합수단을 매개로 착탈 가능하게 결합되는 베어링 홀더(200)와;
일단이 상기 베어링 홀더(200)의 끼움홈부(210) 내에 진입되어 끼움 결합되고, 타단이 일단으로부터 절곡되어 상기 볼베어링(50)의 외측에 탄성 가압력을 제공하는 판스프링인 탄성부재(300);를 포함하고,
상기 탄성부재(300)는,
일단이 상기 끼움홈부(210) 내에 진입되는 끼움부(310)와,
상기 끼움부(310)의 타단 측에서 사선 방향으로 끼움부(310)의 일단측으로 연장되도록 절곡되고, 단부측에 상측으로 절곡된 탄성편(325)이 형성되며, 상기 볼베어링(50)의 외측에 탄성 가압력을 제공하는 절곡부(320)를 포함하고,
상기 끼움홈부(210)의 상부면에 연통되도록 천공 형성되는 결합공(410)에 체결되어 회전동작시 승강동작되며, 상기 끼움부(310)에 하중을 제공하여 상기 탄성부재(300)의 장력을 조절하는 조절볼트(420)를 더 포함하는 전동식 파워 스티어링장치의 베어링 홀더 구조체.Combined to surround the ball bearing 50 disposed at the end of the worm shaft 10 for an electric power steering device, the fitting groove 210 is protruded on the upper portion, and the housing 100 accommodates the worm shaft 10 A bearing holder 200 detachably coupled via a coupling means;
One end is entered into the fitting groove portion 210 of the bearing holder 200, the fitting is coupled, the other end is bent from one end, the elastic member 300 that is a plate spring providing elastic pressing force to the outside of the ball bearing 50; Including,
The elastic member 300,
Once the fitting portion 310 is entered into the fitting groove portion 210,
The elastic piece 325 is bent to extend from the other end side of the fitting part 310 to one end side of the fitting part 310 in a diagonal direction, and an elastic piece 325 bent upward at the end side is formed, on the outside of the ball bearing 50. It includes a bent portion 320 that provides an elastic pressing force,
It is fastened to a coupling hole 410 that is perforated so as to communicate with the upper surface of the fitting groove portion 210, and is moved up and down during rotation, and provides a load to the fitting portion 310 to increase the tension of the elastic member 300. Bearing holder structure of the electric power steering apparatus further comprising an adjusting bolt 420 for adjusting. 청구항 1에 있어서,
상기 베어링 홀더(200)의 외주연 둘레에 형성되고 자체 탄성을 갖도록 분할 형성되고, 상기 베어링 홀더(200)가 수용되는 상기 하우징(100)의 단부 내주면 둘레에 형성된 걸림홈(110) 내에 단부가 록킹 결합되는 복수의 지지편(220)으로 구성되는 전동식 파워 스티어링장치의 베어링 홀더 구조체.The method according to claim 1,
It is formed around the outer periphery of the bearing holder 200 and is formed to have its own elasticity, and the end is locked in the locking groove 110 formed around the inner peripheral surface of the end of the housing 100 in which the bearing holder 200 is accommodated. A bearing holder structure of an electric power steering device composed of a plurality of supporting pieces 220 to be coupled. 삭제delete 청구항 1에 있어서,
상기 조절볼트(420)에 체결되어 상기 조절볼트(420)의 풀림을 방지하는 너트부재(430)를 더 포함하는 전동식 파워 스티어링장치의 베어링 홀더 구조체.The method according to claim 1,
A bearing holder structure of the electric power steering apparatus further comprising a nut member 430 that is fastened to the adjustment bolt 420 to prevent loosening of the adjustment bolt 420. 청구항 1에 있어서,
상기 끼움홈부(210)는 상기 하우징(100)의 단부 일측에 형성된 절개홈(120)에 진입되는 전동식 파워 스티어링장치의 베어링 홀더 구조체.The method according to claim 1,
The fitting groove portion 210 is a bearing holder structure of an electric power steering device that enters the incision groove 120 formed at one end of the housing 100. 청구항 1에 있어서,
상기 끼움부(310)의 좌,우 양측에는 끼움편(315)이 각각 형성된 전동식 파워 스티어링장치의 베어링 홀더 구조체.The method according to claim 1,
The bearing holder structure of the electric power steering apparatus in which the fitting pieces 315 are respectively formed on both the left and right sides of the fitting part 310.
KR1020150190531A 2015-12-31 2015-12-31 Structure of bearing holder for electric power steering system KR102101664B1 (en)

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KR102591716B1 (en) * 2016-10-31 2023-10-23 현대모비스 주식회사 Motor driven power steering system
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