KR20010047804A - Ball-nut body sealing ASS'Y of gearing EPS for car - Google Patents

Ball-nut body sealing ASS'Y of gearing EPS for car Download PDF

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Publication number
KR20010047804A
KR20010047804A KR1019990052183A KR19990052183A KR20010047804A KR 20010047804 A KR20010047804 A KR 20010047804A KR 1019990052183 A KR1019990052183 A KR 1019990052183A KR 19990052183 A KR19990052183 A KR 19990052183A KR 20010047804 A KR20010047804 A KR 20010047804A
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South Korea
Prior art keywords
seal
ball
sealing structure
ring rim
ball nut
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KR1019990052183A
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Korean (ko)
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KR100392656B1 (en
Inventor
남궁주
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밍 루
주식회사 만도
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Priority to KR10-1999-0052183A priority Critical patent/KR100392656B1/en
Publication of KR20010047804A publication Critical patent/KR20010047804A/en
Application granted granted Critical
Publication of KR100392656B1 publication Critical patent/KR100392656B1/en

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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
    • 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
    • B62D5/0412—Electric motor acting on the steering column the axes of motor and steering column being parallel
    • 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
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H25/2418—Screw seals, wipers, scrapers or the like

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Steering Mechanism (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Transmission Devices (AREA)

Abstract

PURPOSE: A ball-nut sealing structure of a car electric EPS connects a seal without another connecting device by compulsively inserting an improved seal into the seal safe receipt portion, thereby increasing a producing ability and decreasing a production cost. CONSTITUTION: A ball-nut sealing structure of a car electric EPS comprises a steel ring rim(32), a rubber ring rim(33) and a ring-shaped spring(34). The steel ring rim(32) prevents an alien substance getting in by inserting a seal(3) into a seal safe receipt portion(22) of a ball-nut(2), and prevents an oil deviating. And the steel ring rim(32) has the cross section to insert compulsively a seal into the interior surface of the seal safe receipt portion. The rubber ring rim(33) inserted integrally into the interior end portion of the steel ring rim connects with the exterior surface of a rack bar(14). The ring-shaped spring hanged at the exterior surface of the rubber ring rim(33) increases a tight coupling power. Therefore, the ball-nut sealing structure of a car electric EPS increases an assembling capacity and decreases a production cost.

Description

자동차용 전동 이피에스의 볼너트부 실링구조 {Ball-nut body sealing ASS'Y of gearing EPS for car}Ball nut part sealing structure of electric pies for automobiles {Ball-nut body sealing ASS'Y of gearing EPS for car}

본 발명은 자동차용 전동EPS의 볼너트부 실링구조에 대한 것으로서, 더 상세하게는 랙 어시스트 기어의 볼너트 실 안착부에 실을 끼우되, 스틸환테와 러버환테로 이루어진 새로운 실부재를 끼워 실링기능을 수행할 수 있도록 하는데 있다.The present invention relates to a ball nut part sealing structure of an electric EPS for automobiles, and more particularly, a thread fitting part of a ball nut thread seating part of a rack assist gear, and a sealing function by inserting a new seal member consisting of a steel ring frame and a rubber ring frame. To do this.

일반적으로 자동차 조향장치는 매뉴얼 스티어링 장치와, 파워 스티어링장치가 있는 바, 매뉴얼 스티어링 장치는 인풋샤프트와 랙바가 단순히 랙&피니언으로 연결되어 있어 오로지 운전자의 힘으로 조향을 하여야 하는 것이고, 파워 스티어링 장치는 핸들을 통해 인풋샤프트를 돌렸을 때, 유압이나 전기모터의 힘을 이용하여 조향하고자 하는 방향으로 별도의 조향배력을 제공할 수 있도록 한 것이다.In general, the vehicle steering system is a manual steering device, a bar with a power steering device, and the manual steering device is an input shaft and a rack bar that are simply connected by a rack and pinion. When the input shaft is turned through the handle, it is possible to provide a separate steering power in the direction of steering by using the force of hydraulic or electric motor.

이와 같은 파워 스티어링 중에서 전동EPS를 1에서 보는 바와 같이 스티어링 기어의 볼너트를 이용하는 랙 어시스트 타입의 조향장치가 있다.Among such power steering, there is a rack assist type steering apparatus using the ball nut of the steering gear as shown in the electric EPS.

이러한 전동 EPS는 조향축(11) 상단의 핸들(12)을 돌렸을 때, 이 조향축의 하단에 연결한 인풋샤프트(13)를 랙바(14)와 랙&피니언으로 치합하여 랙바(14)를 좌, 우 이송시킬 수 있도록 하되, 상기 랙바(14)에 나선홈(15)을 형성하고, 이 나선홈(15)의 둘레에 감합한 볼너트(2)를 구동모터(5)로써 회전시켰을 때, 볼너트(2)의 볼(21)들에 의해 상기 랙바(14)가 좌, 우 길이 방향으로 이동될 수 있도록 한 것이다.When the electric EPS rotates the handle 12 on the top of the steering shaft 11, the input shaft 13 connected to the lower end of the steering shaft 11 is engaged with the rack bar 14 and the rack & pinion to rotate the rack bar 14 left and right. When it is possible to transfer the right, when the spiral groove 15 is formed in the rack bar 14, the ball nut (2) fitted around the spiral groove 15 is rotated by the drive motor 5, The rack bar 14 can be moved in the left and right longitudinal directions by the balls 21 of the nut 2.

이와 같은 EPS 타입의 파워 스티어링 장치에 있어서, 상기 볼너트(2)에는 이물질의 침입을 예방하고 오일의 이탈을 막기 위한 실링구조가 필요한 바, 종래의 실링구조는 도 2에서 볼 수 있다.In the EPS type power steering device, the ball nut 2 needs a sealing structure for preventing the intrusion of foreign substances and preventing the oil from being separated. The conventional sealing structure can be seen in FIG. 2.

즉, 상기 볼너트(2)의 실 안착부(22)에 실(3)을 끼우되, 볼너트(2)의 외주면에서부터 중심을 향해 나사구멍(24)을 형성한 후, 압착용 셋트스크류(4a)와, 풀림방지용 셋트스크류(4b)를 차례로 나삽하여 고정하도록 한 것이다.That is, the thread 3 is inserted into the thread seating portion 22 of the ball nut 2, and after forming the screw hole 24 toward the center from the outer circumferential surface of the ball nut 2, the set screw for pressing ( 4a) and then loosening the set screw (4b) for preventing loosening to fix.

이때의 압착용 셋트스크류(4a)는 돌기(41)를 형성하고, 실(3)에는 요홈(31)을 형성하여 서로 계합된 상태에서 누를 수 있도록 한 것이었다.At this time, the pressing set screw 4a forms the protrusion 41, and the groove 3 is formed in the thread 3 so as to be pressed in the engaged state.

그러나 이와 같은 종래의 실링구조는 볼너트(2)의 실 안착부(22)에 실(3)을 끼운 후, 셋트스크류용 나사구멍(24)을 형성하여야 할 뿐만 아니라 셋트스크류(4a)(4b)를 조여 압착상태를 적절히 맞추어야 하기 때문에 생산성이 떨어지고, 조립이 번거로우며, 제조 원가가 높아지는 단점이 있었다.However, such a conventional sealing structure is not only required to form the threaded hole 3 for the set screw after inserting the seal 3 into the thread seating portion 22 of the ball nut 2, but also for the set screw 4a and 4b. ), There is a disadvantage in that productivity is reduced, assembly is cumbersome, and manufacturing costs are increased because the crimping state must be properly adjusted.

따라서 본 발명은 상기와 같은 종래의 문제점을 감안하여 이를 해결 보완하고자 안출한 것으로서, 발명의 주된 목적은 볼너트의 실 안착부에 새로이 개량된 실을 압입하므로써, 별도의 체결수단이 없이도 실이 설치될 수 있도록 하는데 있으며, 더 나가서 생산성을 높이고, 제조 원가를 낮출 수 있도록 하는데 있는 것이다.Therefore, the present invention has been made in view of the conventional problems as described above to solve the problem, the main object of the invention is by inserting a newly improved thread to the thread seating portion of the ball nut, the thread is installed without a separate fastening means It is to make it possible, to go further, to increase productivity, and to lower manufacturing costs.

이를 위한 특징적인 수단은 볼너트의 실 안착부에 실을 끼워 이물질의 침입을 막고 오일의 누출을 예방할 수 있도록 하되, 상기한 실은 실 안착부의 내주면에 억지 끼움할 수 있도록 ??자형 단면을 가지는 스틸환테와, 상기한 스틸환테의 내단부에 일체로 끼워진 채 랙바의 외주면에 접하게 되는 러버환테와, 상기한 러버환테의 외주면에 걸어 밀착력을 높이기 위한 환형스프링으로 구성하는데 있다.A characteristic means for this is to insert the seal into the thread seat of the ball nut to prevent the ingress of foreign substances and to prevent the leakage of oil, but the thread has a cross-shaped steel to be fitted to the inner peripheral surface of the thread seat The ring frame, the rubber ring frame which is in contact with the outer circumferential surface of the rack bar while being integrally fitted to the inner end of the steel ring frame, and the annular spring to increase the adhesion by hanging on the outer peripheral surface of the rubber ring frame.

도 1은 전동 EPS의 자동차 조향장치를 보인 예시도1 is an exemplary view showing a vehicle steering device of the electric EPS

도 2는 종래의 볼너트부의 실링구조를 보인 단면도2 is a cross-sectional view showing a sealing structure of a conventional ball nut portion

도 3은 본 발명에 따른 볼너트부의 실링구조를 보인 단면도Figure 3 is a cross-sectional view showing a sealing structure of the ball nut portion according to the present invention

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

2 : 볼너트 3 : 실2: ball nut 3: thread

22 : 실 안착부 32 : 스틸환테22: thread seating part 32: steel ring

33 : 러버환테 34 : 환형 스프링33: rubber ring 34: annular spring

이하 본 발명의 실시예에 따른 구성 및 작용을 첨부 도면에 따라 상세히 설명한다.Hereinafter, the configuration and operation according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

자동차용 전동EPS의 볼너트부에 있어서, 볼너트(2)의 실 안착부(22)에 실(3)을 끼워 이물질의 침입을 막고, 오일의 누출을 예방할 수 있도록 실링구조를 형성하되, 새로운 실(3)을 끼워 넣는다.In the ball nut part of the electric EPS for automobiles, a seal structure is formed to prevent the inflow of foreign substances and prevent the leakage of oil by inserting the seal 3 into the thread seating portion 22 of the ball nut 2, Insert the thread (3).

상기한 실(3)은 스틸환테(32)와, 러버환테(33)와, 환형스프링(34)으로 이루어 지는 바, 스틸환테(32)는 ??자 단면을 가지도록 하여 그 외주면이 축의 길이 방향으로 나란하도록 형성하고, 내단부(32a)는 축과 단면방향으로 형성하는 한편, 상기 러버환테(33)는 상기한 스틸환테(32)의 내단부(32a)에 일체로 끼워 지도록 조립하고, 환형 스프링(34)은 상기한 러버환테(33)의 외주면에 감합한 것이다.The seal 3 is made of a steel ring frame 32, a rubber ring frame 33, and an annular spring 34, the steel ring frame 32 has a ??-shaped cross section so that its outer peripheral surface is the length of the shaft Direction side, the inner end portion 32a is formed in the axial and cross-sectional direction, while the rubber ring frame 33 is assembled to be integrally fitted to the inner end portion 32a of the steel ring frame 32, The annular spring 34 is fitted to the outer circumferential surface of the rubber ring frame 33 described above.

이와 같은 실(3)을 실 안착부(22)에 조립하고자 할 때는 스틸환테(32)의 외주면을 실 안착부(22)의 내주면에 억지 끼움되도록 한다.When the thread 3 is to be assembled to the thread seating portion 22, the outer circumferential surface of the steel ring frame 32 is forcibly fitted to the inner circumferential surface of the thread seating portion 22.

이후, 러버환테(33)의 외주면에 환형 스프링(34)을 감합하여 끼우면 러버환테(33)의 내주면이 랙바(14)의 표면에 밀착되어 실링역할을 수행할 수 있게 된다.Subsequently, when the annular spring 34 is fitted to the outer circumferential surface of the rubber ring frame 33, the inner circumferential surface of the rubber ring frame 33 is in close contact with the surface of the rack bar 14 to perform a sealing role.

위에서 상세히 설명한 바와 같은 본 발명은 스틸환테(32)를 이용하여 볼너트(2)의 실 안착부(22)에 억지끼움하기 때문에 조립성이 크게 뛰어난 것이며, 또, 러버환테(33)는 환형 스프링(34)을 이용하여 랙바(14)의 표면에 밀착되도록 하였기 때문에 실링 효과가 매우 우수해 지는 것이고, 종래와 달리 볼너트(2)에 나사구멍을 형성하지 않을 뿐만 아니라 별도의 셋트스크류 등을 추가로 사용하지 않기 때문에 생산원가도 낮출 수 있는 등 여러 가지 장점이 있는 것이다.The present invention as described above in detail is greatly excellent in assemblability because it is fitted to the thread seating portion 22 of the ball nut 2 using the steel ring frame 32, the rubber ring frame 33 is an annular spring The sealing effect is very excellent because it is in close contact with the surface of the rack bar 14 using the (34), and unlike the conventional, not only does not form a screw hole in the ball nut 2, but also adds a separate set screw and the like. Because it does not use, it has several advantages, such as lowering the production cost.

Claims (1)

나선홈(15)을 가진 랙바(14)가 볼너트(2)의 중앙으로 끼워진 자동차용 전동EPS의 볼너트부 실링구조에 있어서,In the ball nut part sealing structure of the electric EPS for automobiles, in which the rack bar 14 having the spiral groove 15 is inserted into the center of the ball nut 2, 볼너트(2)의 실 안착부(22)에 실(3)을 끼워 이물질의 침입을 막고, 오일의 누출을 예방할 수 있도록 하되,Insert the seal (3) into the thread seating portion 22 of the ball nut (2) to prevent foreign matter from entering, and to prevent the leakage of oil, 상기한 실(3)은 실 안착부(22)의 내주면에 억지 끼움할 수 있도록 ??자형 단면을 가지는 스틸환테(32)와, 상기한 스틸환테의 내단부(32a)에 일체로 끼워진 채 랙바(14)의 외주면에 접하게 되는 러버환테(33)와, 상기한 러버환테(33)의 외주면에 걸어 밀착력을 높이기 위한 환형스프링(34)으로 구성하여서 된 것을 특징으로 하는 자동차용 전동EPS의 볼너트부 실링구조.The thread (3) is a rack bar while being integrally fitted to the inner ring (32a) of the steel ring frame having a ??-shaped cross section and the steel ring frame so as to be forcibly fitted to the inner peripheral surface of the thread seating portion 22 Ball nut of the electric EPS for automobiles, characterized by consisting of a rubber ring frame (33) in contact with the outer peripheral surface of (14) and an annular spring (34) to increase the adhesion to the outer peripheral surface of the rubber ring frame (33) Part sealing structure.
KR10-1999-0052183A 1999-11-23 1999-11-23 Ball-nut sealingASS'Y of gearing EPS for car KR100392656B1 (en)

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KR10-1999-0052183A KR100392656B1 (en) 1999-11-23 1999-11-23 Ball-nut sealingASS'Y of gearing EPS for car

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Application Number Priority Date Filing Date Title
KR10-1999-0052183A KR100392656B1 (en) 1999-11-23 1999-11-23 Ball-nut sealingASS'Y of gearing EPS for car

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KR100392656B1 KR100392656B1 (en) 2003-07-23

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0291253A (en) * 1988-09-26 1990-03-30 Orishige:Kk Inlay pile fabric and knitting equipment therefor
JP2582061Y2 (en) * 1992-12-04 1998-09-30 エヌティエヌ株式会社 Ball screw and its sealing device
JPH11166608A (en) * 1997-12-02 1999-06-22 Ntn Corp Ball screw
JPH11334612A (en) * 1998-05-26 1999-12-07 Nippon Seiko Kk Electric power steering system

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