KR100548042B1 - Rack housing of power steering and manufacturing method thereof - Google Patents

Rack housing of power steering and manufacturing method thereof Download PDF

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Publication number
KR100548042B1
KR100548042B1 KR1019990005111A KR19990005111A KR100548042B1 KR 100548042 B1 KR100548042 B1 KR 100548042B1 KR 1019990005111 A KR1019990005111 A KR 1019990005111A KR 19990005111 A KR19990005111 A KR 19990005111A KR 100548042 B1 KR100548042 B1 KR 100548042B1
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South Korea
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rack housing
rack
manufacturing
power steering
glass fiber
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KR1019990005111A
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Korean (ko)
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KR20000056083A (en
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오금순
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주식회사 만도
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3047—Steering wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/775—Toothed articles
    • B29L2031/7752—Racks

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

본 발명은 파워스티어링의 랙 하우징 제조방법에 관한 것으로, 보다 상세하게는 랙 하우징의 소재를 변경하여 경량화시키고, 오토 인서트 인젝션 몰딩( AUTO INSERT INJECTON MOULDING)방법을 이용하여 별도의 기계가공을 거치지 않고 단품화시킨 파워스티어링의 랙 하우징 및 그 제조방법에 관한 것이다.The present invention relates to a method of manufacturing a rack housing for power steering, and more particularly, to reduce the weight of a rack housing by weight, and to use a single insert without a separate machining process using an AUTO INSERT INJECTON MOULDING method. The present invention relates to a rack housing for a fired power steering system and a method of manufacturing the same.

본 발명은 랙 하우징의 제조시 열가소성 수지인 폴리 아미드(Polyamide)와 글래스 파이버(Glass Fiber)를 혼합하여 가열 유동화하여 금형속으로 주입하여 인젝션 몰딩공법으로 사출하여 제조하여 단품화시키므로서 다수의 기계가공 공정을 단축하여 작업 사이클이 단축되는 효과가 있으며, 소재를 변경하므로서 제품의 경량화를 이룰수 있고, 그로 인한 원가절감이 수반되어 생산성이 향상되는 잇점이 있다.The present invention is manufactured by manufacturing a rack housing by mixing a polyamide (Polyamide) and glass fiber (Glass Fiber) of the thermoplastic resin and heat-flow fluidized into the mold to be injected by injection molding method to produce a single unit The process can be shortened by shortening the process, and the weight of the product can be reduced by changing the material, and the cost is reduced, thereby improving productivity.

Description

파워 스티어링의 랙 하우징 및 그 제조방법{RACK HOUSING OF POWER STEERING AND MANUFACTURING METHOD THEREOF} Rack housing for power steering and its manufacturing method {RACK HOUSING OF POWER STEERING AND MANUFACTURING METHOD THEREOF}             

도 1 은 종래의 랙 하우징의 형상을 보여주는 평면도1 is a plan view showing the shape of a conventional rack housing

도 2 는 본 발명의 랙 하우징의 형상을 보여주는 평면도Figure 2 is a plan view showing the shape of the rack housing of the present invention

도 3 는 도 2의 A-A선을 절단했을때의 단면도3 is a cross-sectional view taken along the line A-A of FIG.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

10 랙 하우징11 몸체10 Rack Housing 11 Body

12 랙바14 피니언12 Rack Bar 14 Pinion

16 그리스 홀18 래크부16 Grease Hole 18 Rack

20 부시22 요크 플러그 삽입부20 bush22 yoke plug insert

24 돌기부26 공기빼기홀24 Protrusion 26 Air bleed hole

본 발명은 파워스티어링의 랙 하우징 및 그 제조방법에 관한 것으로, 보다 상세하게는 랙 하우징의 소재를 변경하여 경량화시키고, 오토 인서트 인젝션 몰딩( AUTO INSERT INJECTON MOULDING)방법을 이용하여 별도의 기계가공을 거치지 않고 단품화시킨 파워스티어링의 랙 하우징 및 그 제조방법에 관한 것이다.The present invention relates to a rack housing of power steering and a method of manufacturing the same, and more particularly, to reduce the weight of the rack housing by changing the material, and to perform a separate machining process using an AUTO INSERT INJECTON MOULDING method. The present invention relates to a rack housing for power steering that is singulated without use and to a method of manufacturing the same.

일반적으로 차량에 사용되는 파워스티어링은 가벼운 핸들력으로 자동차를 선회시킬 수 있도록 엔진으로 구동되는 유압펌프의 유압을 동력원으로 하는 배력장치이다.In general, power steering used in a vehicle is a power unit using the hydraulic power of the hydraulic pump driven by the engine to turn the car with a light steering force.

동력원으로는 전기모터로 구동되는 유압펌프 방식과, 전기모터 그 자체로 실행하는 방식이 있다.As the power source, there are a hydraulic pump driven by an electric motor and a method executed by the electric motor itself.

그 구성을 살펴보면, 스티어링 휠의 회전력을 전달시키기 위한 토션바와, 상기 토션바의 외측에 끼움 결합되는 컨트롤 밸브 샤프트와, 상기 컨트롤 밸브 샤프트의 외측에 결합되는 로터리 밸브와, 상기 로터리 밸브에 연결되고 상기 토션바가 고정핀에 의해 고정되는 피니언 샤프트와, 상기 피니언 샤프트의 하단에 형성되는 피니언과, 상기 피니언에 맞물려서 회전되고, 타이로드에 의해 연결된 휠을 방향전환시켜주는 랙바로 구성되어 진다.Looking at the configuration, a torsion bar for transmitting the rotational force of the steering wheel, a control valve shaft fitted to the outside of the torsion bar, a rotary valve coupled to the outside of the control valve shaft, the rotary valve is connected to the The torsion bar is composed of a pinion shaft which is fixed by a fixing pin, a pinion formed at the lower end of the pinion shaft, and a rack bar which rotates in engagement with the pinion and redirects a wheel connected by a tie rod.

상기 랙바는 그 상부면에 피니언과 치합되는 다수의 기어가 형성되고, 상기 피니언과 맞물려 피니언의 회전운동을 직선운동으로 변환하여 휠의 방향을 전환시켜 준다.The rack bar is formed with a plurality of gears meshing with the pinion on the upper surface, and meshes with the pinion to convert the rotational motion of the pinion into a linear motion to change the direction of the wheel.

상기와 같은 랙바는 일측에 래크부가 형성되어 있고, 그 래크가 피니언과 치합하여 움직이도록 되어 있으며, 상기 래크부와 결합되는 피니언은 랙 하우징에 삽입 설치된다.The rack bar as described above is formed with a rack portion on one side, the rack is engaged with the pinion to move, the pinion coupled to the rack portion is inserted into the rack housing is installed.

이때, 랙 하우징은 각 부품의 주파트를 다이캐스트로 양산한 후 부품의 주요부위를 머시닝가공을 하여 정도를 맞추고 부자재등을 압입하여 본 어세이에 조립하여 제조한다.At this time, the rack housing is manufactured by mass-producing the main parts of each part by machining, then machining the main parts of the parts to match the degree, and injecting the subsidiary materials and the like into the assembly.

도 1 은 종래의 랙 하우징의 형상을 보여주는 평면도로서, 랙 하우징(100)은 랙바(18)와 피니언(120)이 설치되어 피니언의 회전운동이 랙바의 직선운동으로 변환되어 휠을 움직이도록 설치된다.1 is a plan view showing the shape of a conventional rack housing, the rack housing 100 is a rack bar 18 and the pinion 120 is installed so that the rotational movement of the pinion is converted into a linear movement of the rack bar is installed to move the wheel. .

기본적인 구성으로는 랙 하우징(100)의 몸체(116)의 우측부에 랙바(18)가 삽입되는 랙바 삽입부(110)가 형성되고, 상기 몸체(116)의 수직한 방향으로 요크 플러그가 끼워지는 요크 플러그 삽입부(112)가 형성되며, 피니언(120)이 삽입되는 피니언 삽입부(114)가 형성된다.In a basic configuration, a rack bar insertion unit 110 into which the rack bar 18 is inserted is formed at the right side of the body 116 of the rack housing 100, and the yoke plug is fitted in a vertical direction of the body 116. The yoke plug insertion part 112 is formed, and the pinion insertion part 114 into which the pinion 120 is inserted is formed.

랙 하우징(100)은 정밀성을 갖출수 있도록 다이캐스팅 공법으로 제조하고, 그 후에 랙바 삽입부(110)를 제 1차 기계가공하고, 상기 피니언 삽입부(114)와 요크 플러그 삽입부(112)를 각각 2차 및 3차 기계가공한 후, 상기 랙바 삽입부(110)에 랙바(18)를 삽입하는 후압입 공정을 실시하여 조립하였다.The rack housing 100 is manufactured by a die casting method so as to have precision, and then the rack bar insert 110 is first machined, and the pinion insert 114 and the yoke plug insert 112 are respectively formed. After the secondary and tertiary machining, it was assembled by performing a post-pressing step of inserting the rack bar 18 into the rack bar insert 110.

상기와 같은 다이캐스팅 공법에 의해 제조된 랙 하우징은 다이캐스팅에 사용 되는 소재의 특성상 금형을 사용하므로 무게가 무거웠고, 랙 하우징 내부에 형성되는 그리스홀의 깊이 치수가 필요하였고, 기존 치수(깊이) 적용시 그리스 홀외의 두께가 두꺼워지는 문제점이 있었으며, 랙바 삽입부 외주면의 살두께가 각각 다른 치수를 갖는 언밸런스부가 발생하여 내부치수의 변경이 어려운 문제점이 있었다.The rack housing manufactured by the die casting method as described above is heavy due to the use of dies due to the characteristics of the material used for die casting, and requires the depth dimension of the grease hole formed inside the rack housing, There was a problem in that the thickness outside the hole was thick, and an unbalanced part having different dimensions of the thickness of the outer circumferential surface of the rack bar insertion part was generated, thus making it difficult to change the internal dimensions.

또한, 상기와 같은 랙 하우징 제조방법은 다이캐스팅 공정을 한 후, 기계가공과 압입공정 등의 공정을 실행하여야 하므로 작업공정시간이 오래 걸렸고, 그로 인하여 부품의 생산성도 저하되는 원인이 되었다.In addition, the rack housing manufacturing method as described above requires a process such as a machining process and a press-fitting process after the die casting process, which takes a long time for the work process, thereby causing a decrease in the productivity of parts.

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출한 것으로서, 랙 하우징을 경량화시키기 위해 폴리아미드(Polyamide)와 글래스 파이버(Glass Fiber)를 혼합한 열가소성 수지로 이루어지는 파워스티어링의 랙 하우징을 제공하는 것을 특징으로 한다.Accordingly, the present invention has been made to solve the above problems, to provide a rack housing of power steering made of a thermoplastic resin mixed with polyamide and glass fiber to reduce the weight of the rack housing It is characterized by.

본 발명의 목적은 열가소성수지를 용융 주입한 후, 오토 인서트 인젝션(Auto Insert Injection) 몰딩 공법을 이용하므로서 별도의 기계가공 공정을 하지 않고, 랙 하우징을 단품화시키기 위한 파워스티어링의 랙 하우징 제조방법을 제공하는 것을 특징으로 한다.SUMMARY OF THE INVENTION An object of the present invention is to manufacture a rack housing of power steering for single-stacking a rack housing without a separate machining process by using an auto insert injection molding method after melt injection of a thermoplastic resin. It is characterized by providing.

본 발명의 또 다른 목적은 오토 인서트 인젝션 몰딩 방법을 사용하여 기계가공없이 본체 어세이에 조립할 수 있도록 하여 생산성을 향상시키기 위한 파워스티어링의 랙 하우징을 제공하는 것을 그 목적으로 한다.
It is another object of the present invention to provide a rack housing of power steering for improving productivity by allowing assembly to a body assay without machining using an auto insert injection molding method.

본 발명에 의한 파워스티어링의 랙 하우징 제조방법은, 열가소성 수지를 가열 유동화하여 주형속으로 넣어서 인서트 몰딩 방법으로 사출하여 랙 하우징을 제조하는 것을 특징으로 한다.The rack housing manufacturing method of the power steering according to the present invention is characterized in that the thermoplastic resin is heated and fluidized into a mold and injected into the insert molding method to manufacture the rack housing.

상기 열가소성 수지는 폴리아미드(Polyamide)와 글래스 파이버(Glass Fiber)의 혼합으로 이루어지는 것을 특징으로 한다.The thermoplastic resin is characterized in that the mixture of polyamide (Polyamide) and glass fiber (Glass Fiber).

상기 인서트 몰딩 방법으로 형성된 랙 하우징의 몸체 일측부에 랙바 삽입부가 형성되며, 그 내주면에 부시의 이탈이 자유롭도록 다수의 공기빼기홀이 형성되는 것을 특징으로 한다.A rack bar insertion part is formed at one side of the body of the rack housing formed by the insert molding method, and a plurality of air vent holes are formed on the inner circumferential surface of the rack housing to allow the bush to be freely separated.

상기 부시의 내주면에는 다수의 그리스홀이 형성되는 것을 특징으로 한다.A plurality of grease holes are formed on the inner circumferential surface of the bush.

이하, 첨부된 도면을 참조하여 본 발명의 파워스티어링의 랙 하우징 및 그 제조방법을 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings illustrating a rack housing and a manufacturing method of the power steering of the present invention.

먼저, 열가소성 수지를 가열 유동화하여 주형속으로 주입하여 인젝션 몰딩 방법을 이용하여 랙 하우징(10)을 성형한다.First, the thermoplastic resin is heated and fluidized and injected into a mold, thereby forming the rack housing 10 using an injection molding method.

상기 열가소성 수지는 폴리아미드(Polyamide)와 글래스 파이버(Glass Fiber)의 혼합으로 이루어지는 것을 특징으로 한다.The thermoplastic resin is characterized in that the mixture of polyamide (Polyamide) and glass fiber (Glass Fiber).

상기 인젝션 몰딩방법에 의해 성형된 랙 하우징의 일측부에는 랙바 삽입부(110)가 형성되고, 그 내주면에는 부시(20)의 이탈이 자유롭도록 공기빼기홀(26)을 형성한다.A rack bar insert 110 is formed at one side of the rack housing molded by the injection molding method, and an air bleed hole 26 is formed at the inner circumferential surface thereof so that the bush 20 can be freely separated.

도 2 는 본 발명의 랙 하우징의 형상을 보여주는 평면도이고, 도 3 은 도 1의 A-A선을 절단했을때의 단면도이다.Figure 2 is a plan view showing the shape of the rack housing of the present invention, Figure 3 is a cross-sectional view when the line A-A of Figure 1 cut.

열가소성 수지를 가열 유동화시키고, 실린더내의 플런저를 이용하여 주형속으로 주입한 후, 사출하여 형성되는 랙 하우징(10)의 몸체(11)와, 상기 몸체(11)의 우측으로부터 내측에 랙바(12)를 수평하게 삽입시킬 수 있도록 형성된 랙바삽입부(110)와, 상기 몸체(11)에 삽입된 랙바(12)의 래크부(18)와 치합되는 피니언(14)이 삽입되는 피니언 삽입부(114)와, 상기 몸체(11)의 상방으로 수직하게 형성되고, 요크 플러그가 삽입되는 요크 플러그 삽입부(22)로 이루어진다.The thermoplastic resin is heated and fluidized, injected into the mold by using a plunger in the cylinder, and then injected into the mold 11 of the rack housing 10, and the rack bar 12 disposed from the right side of the body 11 to the inside. The pinion insertion part 114 into which the rack bar insertion part 110 and the pinion 14 which engage with the rack part 18 of the rack bar 12 inserted in the said body 11 are inserted so that it may be inserted horizontally. And a yoke plug insertion portion 22 formed vertically above the body 11 and into which the yoke plug is inserted.

상기와 같이 이루어진 랙 하우징(10)은 종래에 사용하던 랙하우징의 소재를 열가소성 수지로 바꾸어 가열 유동화시키고, 실린더내의 플런저를 이용하여 금형속으로 주입하여 랙 하우징(10)의 몸체(11)를 인젝션 몰딩 공정을 이용하여 사출하여 형성하고, 상기 몸체(11)의 우측부 내측에는 윤활제가 흘러들어갈 수 있도록 다수의 그리스홀(16)이 형성된 부시(20)를 삽입한다.The rack housing 10 made as described above is made by converting the material of the rack housing used in the prior art into a thermoplastic resin and heating and fluidizing the same. The injection molding is performed using a molding process, and a bush 20 having a plurality of grease holes 16 formed therein is inserted into the right side of the body 11 so that lubricant can flow therein.

상기 부시(20)의 내측으로는 랙바(12)를 삽입하고, 상기 피니언(14)을 삽입하여 상기 랙바(12)의 래크부(18)와 치합하여 동작될 수 있도록 결합시킨다.The rack bar 12 is inserted into the bush 20, and the pinion 14 is inserted to engage with the rack portion 18 of the rack bar 12 to be operated.

상기 랙 하우징의 소재에 사용되는 열가소성 수지는 폴리아미드(Ployamide)와 글래스 파이버(Glass Fiber)를 혼합하여 사용하므로서 사출 성형된 랙 하우징의 무게를 경량화시킨다.The thermoplastic resin used in the material of the rack housing is made of a mixture of polyamide (Ployamide) and glass fiber (glass fiber) to reduce the weight of the injection molded rack housing.

또한, 상기 부시(20)가 삽입되는 랙바 삽입부(110)의 내주면에는 다수의 공 기빼기홀(26)을 형성되는데 바람직하게는 120도 간격으로 3개정도 형성하는 것이 좋다.In addition, a plurality of air bleed holes 26 are formed on the inner circumferential surface of the rack bar insertion unit 110 into which the bush 20 is inserted. Preferably, three or more air gaps are formed at intervals of 120 degrees.

아울러, 상기와 같은 오토 인젝션 인서트 몰딩 공법을 사용하여 제조된 랙 하우징은 별도의 기계가공을 할 필요가 없으므로 본체 어세이에 빠르게 조립할 수 있는 단품화가 이루어진다.In addition, the rack housing manufactured using the above-mentioned auto-injection insert molding method does not need to be machined separately, so that a single product can be quickly assembled to a main body assay.

이상에서 살펴본 바와 같이, 본 발명은 랙 하우징을 사출성형하여 단품화하므로서 제조시 다수의 기계가공 공정을 단축하여 작업 사이클이 단축되는 효과가 있으며, 소재를 변경하므로서 제품의 경량화를 이룰수 있고, 그로 인한 원가절감이 수반되어 생산성이 향상되는 잇점이 있다.















As described above, the present invention has the effect of shortening the work cycle by shortening a number of machining processes during manufacturing by injection molding the rack housing separately, and can achieve a lighter weight of the product by changing the material, thereby Cost savings are accompanied by productivity gains.















Claims (2)

파워 스티어링의 랙 하우징 제조방법에 있어서,In the rack housing manufacturing method of the power steering, 상기 랙 하우징의 제조시 열가소성 수지인 폴리 아미드(Polyamide)와 글래스 파이버(Glass Fiber)를 혼합하여 가열 유동화하여 주형속으로 주입하여 인젝션 몰딩공법으로 사출하여 제조하되,In the manufacture of the rack housing, a thermoplastic resin polyamide (Polyamide) and glass fiber (Glass Fiber) is mixed, heated and fluidized and injected into the mold speed to be manufactured by injection molding method, 상기 인서트 몰딩공법에 의해 제조되는 랙 하우징은 그 우측부에 형성된 랙바 삽입부의 내주면에 다수의 공기빼기홀을 형성하는 것을 특징으로 하는 파워스티어링의 랙 하우징 제조방법.The rack housing manufactured by the insert molding method is a rack housing manufacturing method of the power steering, characterized in that to form a plurality of air vent holes on the inner circumferential surface of the rack bar insertion portion formed on the right side. 삭제delete
KR1019990005111A 1999-02-12 1999-02-12 Rack housing of power steering and manufacturing method thereof KR100548042B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0423863A (en) * 1990-05-17 1992-01-28 Kishimoto Sangyo Kk Highly strong polyamide resin composition and its preparation thereof
JPH05230366A (en) * 1992-02-17 1993-09-07 Kishimoto Sangyo Kk Galss-fiber reinforced polyamide resin composition and method for molding the same
JPH10130495A (en) * 1996-10-29 1998-05-19 Asahi Chem Ind Co Ltd Polyamide resin composition and injection-molded products using the same
JPH10249879A (en) * 1997-03-17 1998-09-22 Toray Ind Inc Production of part for engine cooling water system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0423863A (en) * 1990-05-17 1992-01-28 Kishimoto Sangyo Kk Highly strong polyamide resin composition and its preparation thereof
JPH05230366A (en) * 1992-02-17 1993-09-07 Kishimoto Sangyo Kk Galss-fiber reinforced polyamide resin composition and method for molding the same
JPH10130495A (en) * 1996-10-29 1998-05-19 Asahi Chem Ind Co Ltd Polyamide resin composition and injection-molded products using the same
JPH10249879A (en) * 1997-03-17 1998-09-22 Toray Ind Inc Production of part for engine cooling water system

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