KR100383647B1 - Device for measuring concentricity for rack housing - Google Patents

Device for measuring concentricity for rack housing Download PDF

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KR100383647B1
KR100383647B1 KR1019970077255A KR19970077255A KR100383647B1 KR 100383647 B1 KR100383647 B1 KR 100383647B1 KR 1019970077255 A KR1019970077255 A KR 1019970077255A KR 19970077255 A KR19970077255 A KR 19970077255A KR 100383647 B1 KR100383647 B1 KR 100383647B1
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South Korea
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rack housing
concentricity
arbor
ball
holder
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KR1019970077255A
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Korean (ko)
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KR19990057207A (en
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허만인
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주식회사 만도
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
    • G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
    • G01B5/143—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures between holes on a workpiece
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/28—Measuring arrangements characterised by the use of mechanical techniques for measuring roughness or irregularity of surfaces
    • G01B5/285—Measuring arrangements characterised by the use of mechanical techniques for measuring roughness or irregularity of surfaces for controlling eveness

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

PURPOSE: A concentricity measuring device for a rack housing is provided to increase the measuring precision by conveniently measuring and inspecting the concentricity of the yoke hole in the rack housing, and to reduce process and cost by excluding the transporting process. CONSTITUTION: A concentricity measuring device for a rack housing is composed of a holder(24) mounting a small lever(23); an upper ball arbor(22) composed of the portion of the rotary ball as large as a bearing insertion part(A) of a yoke hole(11) of the rack housing, and combined with the holder; and a lower ball arbor(21) composed of the portion of the rotary ball integrated with a bearing insertion part(B) of the yoke hole and connected to the lower part of the upper ball arbor. A projection of the lower part of the upper ball arbor is integrated with a groove of the upper part of the lower ball arbor. A groove is formed around the upper part of the upper ball arbor, and a pin hole is formed in the holder.

Description

랙하우징용 동심도 측정구Concentricity Measuring Sphere for Rack Housing

본 발명은 차량의 랙하우징(Rack housing)용 동심도 측정구에 관한 것으로서, 더욱 상세하게는, 랙하우징 몸통을 관통하여 형성된 요오크홀(Yoke hole)의 동심도를 간편하게 측정할 수 있음은 물론 측정정확도 향상을 기할 수 있도록 한 랙하우징용 동심도 측정구에 관한 것이다.The present invention relates to a concentricity measuring instrument for a rack housing of a vehicle, and more particularly, to easily measure the concentricity of a yoke hole formed through a rack housing body, as well as measurement accuracy. It relates to a concentricity measuring instrument for rack housing that can be improved.

차량의 주행안전을 확보하는 측면에서, 상기 랙하우징 또는 랙바(Rack bar) 등 랙 관련부품을 검사함에는 통상 각별한 주의가 요구된다고 할 수 있다.In terms of securing driving safety of the vehicle, special attention is usually required to inspect the rack-related parts such as the rack housing or the rack bar.

실제의 경우, 랙하우징은 가공에 앞서 필히 소재검사를 거침은 물론, 가공후 3차원 측정실에서 가공정밀도 등을 엄격히 측정·검사한다. 그 가운데서도 랙하우징을 관통하여 형성된 상기 요오크홀의 동심도는 정밀측정의 주요대상이다. 이는, 상기 요오크홀에 결합되는 요오크의 안정적 상대운동 즉, 차량의 주행안전 여부는 해당 요오크홀이 지닌 동심도 여하에 따라 결정되기 때문이다.In practice, the rack housing must not only undergo a material inspection prior to machining, but also strictly measure and inspect machining accuracy in a three-dimensional measuring room after machining. Among them, the concentricity of the yoke hole formed through the rack housing is the main object of precision measurement. This is because the stable relative motion of the yoke coupled to the yoke hole, that is, whether the vehicle is safe to drive is determined depending on the concentricity of the corresponding yoke hole.

여기서, 상기 요오크홀 동심도 측정을 위한 작업개요를 살펴본다.Here, the operation overview for measuring the yoke hole concentricity will be described.

우선, 가공이 끝난 롯드(Lot)별 랙하우징을 적재대 위에 가지런히 적재한 다음 3차원 측정실 등의 정밀측정실로 옮긴다. 이어, 상기 동심도 내지는 진도 측정·검사를 비롯한 전반적 치수검사를 실시하며, 검사완료와 동시에 각 조립작업장으로 보내지게 되는 것이다.First, the finished rack housing for each lot is neatly stacked on a loading table and then transferred to a precision measuring room such as a three-dimensional measuring room. Subsequently, the overall dimensional inspection including the concentricity or the intensity measurement and inspection is performed, and the inspection is completed and sent to each assembly workshop.

한편, 측정을 위해 다수의 랙하우징을 옮기는 작업은 불가피하다 하더라도, 상기 랙하우징 동심도를 측정함에 있어서는 본질적인 동시에 또한 상당히 중대한 문제가 따르는 실정이다. 즉, 랙하우징 자체의 형상적 특징으로 인해 과다한 측정시간이 소요될 뿐 아니라 측정정확도 역시 그다지 양호하지 못한 점을 들 수 있다.On the other hand, although the task of moving a plurality of rack housings for measurement is unavoidable, there is an essential and also significant problem in measuring the rack housing concentricity. That is, due to the shape of the rack housing itself, not only excessive measurement time is required but also the measurement accuracy is not so good.

상기 랙하우징 형상과 관련된 문제를 좀더 구체적으로 언급하자면, 랙하우징 몸통을 관통한 상기 요오크홀은 상하 2개의 베어링 삽입부를 포함하는데, 동심도 및 진도 등을 측정함에 있어 기준이 되는 이들 두 부위가 상호 반대측에 위치함으로 인해 3차원 측정 자체가 상당히 어렵게 되어 있다.More specifically to the problem related to the rack housing shape, the yoke hole penetrating the rack housing body includes two upper and lower bearing inserts, the two parts which are the reference for measuring concentricity and strength, etc. The location on the opposite side makes the three-dimensional measurement itself quite difficult.

그 결과, 상기 랙하우징 동심도 측정·검사작업에는 과다한 공수투입 및 측정정확도 불량이 따르는 문제가 있어왔다. 상기 운반과정에 소요된 인적, 물적 손실까지 감안한다면 문제의 심각성을 절감하게 된다.As a result, the rack housing concentricity measurement and inspection work has a problem that excessive air input and poor measurement accuracy follow. Considering the human and physical losses incurred in the transport process, the seriousness of the problem is reduced.

본 발명은 종래의 이러한 문제점을 감안하여 안출한 것으로서, 본 발명의 목적은 랙하우징내 요오크홀 동심도를 간편하게 측정·검사할 수 있음은 물론 측정정확도 향상을 기할 수 있도록 된 랙하우징용 동심도 측정구를 제공하는 데 있다.The present invention has been made in view of the above-mentioned problems in the related art, and an object of the present invention is to easily measure and inspect the concentricity of the yoke hole in the rack housing, as well as to improve the measurement accuracy. To provide.

본 발명의 또다른 목적은, 별도 측정실로의 운반과정이 불필요함에 따라 상당한 공수 및 원가절감을 기할 수 있는 랙하우징용 동심도 측정구를 제공함에 있다.It is still another object of the present invention to provide a concentricity measuring instrument for rack housing that can provide considerable man-hours and cost savings as a separate transport process to a measurement chamber is unnecessary.

도 1은 본 발명 실시예의 동심도 측정구 사용상태를 나타낸 부분단면도이다.1 is a partial cross-sectional view showing the concentricity measuring instrument used in the embodiment of the present invention.

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

10 : 랙하우징 11 : 요오크홀10: rack housing 11: yoke hole

20 : 동심도 측정구 21 : 하측 볼 아버20: concentricity measuring sphere 21: lower ball arbor

22 : 상측 볼 아버 23 : 레버22: upper ball arbor 23: lever

이러한 목적을 달성하기 위한 본 발명의 랙하우징용 동심도 측정구는, 상하 2개의 볼 아버(Ball arbor)와, 상측 볼 아버 상방에 결합되는 홀더 및 이에 부착된 레버를 포함하여 구성되며, 검사자가 상기 2개의 볼 아버를 검사대상 요오크홀에 삽설하고 레버 상단면에 다이얼 게이지(Dial gague) 등의 탐침을 접촉시킨 다음, 이들 홀더 및 레버를 회전시키기만 하면 탐침이 해당 요오크홀이 지닌 동심도를 정확히 검출하도록 된 특징이 있다.Concentricity measuring sphere for the rack housing of the present invention for achieving this object, the upper and lower ball arbor (Ball arbor), the upper ball arbor comprises a holder coupled to the upper and the lever attached thereto, the inspector Insert the two ball arbors into the yoke hole to be inspected, contact the probe with a dial gague on the top of the lever, and rotate these holders and levers.The probe will then accurately measure the concentricity of the yoke hole. There is a feature to be detected.

이하, 본 발명의 랙하우징용 동심도 측정구를 첨부도면을 참조하여 상세히 설명한다.Hereinafter, the concentricity measuring instrument for the rack housing of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시예를 나타내는 부분단면도인 바, 절취상태로 도시된 요오크홀(11)내 상하 2개의 베어링 삽입부(A, B)가 해당 구멍의 동심도 내지는 진도 측정에 있어 기준이 되는 부위이다. 그 형상적 특징으로 인해 측정 자체가 어려울 뿐 아니라 측정정확도 역시 그다지 양호하지 않음은 앞서 언급한 바와 같다.Figure 1 is a partial cross-sectional view showing an embodiment of the present invention, the two upper and lower bearing inserts (A, B) in the yoke hole 11 shown in the cut state is a reference for measuring the concentricity or the progress of the hole It is a part. As mentioned above, not only is the measurement itself difficult due to its shape, but also the measurement accuracy is not so good.

여기서, 본 발명 실시예의 동심도 측정구 사용상태를 부분단면도로 나타낸도 1을 참조로, 본 발명의 랙하우징용 동심도 측정구의 구조 및 실제 사용방법을 설명한다.Here, with reference to Fig. 1 showing the concentricity measuring instrument used state of the embodiment of the present invention in a partial cross-sectional view, the structure and actual use method of the concentricity measuring instrument for the rack housing of the present invention.

우선, 동심도 측정구(20)는 일측방에 소형 레버(23)가 부착된 홀더(24)와, 요오크홀(11)내 베어링 삽입부(A)와 일치하는 치수의 회전볼 부분을 구비하며 그 상단부에 상기 홀더(24)가 결합되는 상측 볼 아버(22)와, 요오크홀(11)내 또다른 베어링 삽입부(B)와 일치하는 치수의 회전볼 부분을 구비하며 상기 상측 볼 아버(22) 하단부에 연결되는 하측 볼 아버(21)를 포함하여 구성되어 있다. 또한, 상기 상측 볼 아버(22)의 하단부 및 하측 볼 아버(21)의 상단부는 서로 일치하는 형상의 돌기부 및 홈부로 각각 가공되어 실제 기준척킹(Datum chucking)시 이들을 일체화 연결시키는 역할을 한다.First, the concentricity measuring sphere 20 has a holder 24 having a small lever 23 attached to one side thereof, and a rotating ball portion having dimensions matching the bearing insertion portion A in the yoke hole 11. It has an upper ball arbor 22 to which the holder 24 is coupled to the upper end thereof, and a rotating ball portion having dimensions corresponding to another bearing insert B in the yoke hole 11, and the upper ball arbor ( 22) It is comprised including the lower ball arbor 21 connected to the lower end part. In addition, the lower end of the upper ball arbor 22 and the upper end of the lower ball arbor 21 are respectively processed into protrusions and grooves having a shape corresponding to each other, and serve to connect them integrally during actual datum chucking.

한편, 상기 홀더(24)는 원통형으로서 그 외주부에는 너얼링(Knurling) 가공함으로써 검사자의 손이 미끄러지지 않도록 하는 것이 바람직하다. 물론, 그 형상 또는 외주부 표면가공 여부를 특별히 한정하지는 않는다.On the other hand, it is preferable that the holder 24 is cylindrical and knurling on its outer circumferential portion so that the hand of the inspector does not slip. Of course, the shape or the outer peripheral surface processing is not particularly limited.

요오크홀(11) 동심도를 측정하고자 하는 경우에는, 해당 랙하우징(10)을 상기 하측 볼 아버(21)상에 해당 랙하우징(10)을 덮어씌우듯이 올려놓고 요오크홀(11) 상측 개구부로부터는 상기 상측 볼 아버(22)를 삽입하여 이들 2개의 볼 아버(21, 22)를 일체화 연결한 다음, 핀(26) 등을 써서 홀더(24)를 상측 볼 아버(22) 선단부에 고정시킴으로써 상기 기준척킹을 우선 완료한다. 상기 상측 볼 아버(22) 및 하측 볼 아버(21)를 결합시키는 순간 상측 볼 아버(22)의 해당 회전볼 부분 역시 요오크홀(11)내 해당 베어링 삽입부(A)에 정확히 위치하게 됨은 물론이다.In order to measure the concentricity of the yoke hole 11, the rack housing 10 is placed on the lower ball arbor 21 so as to cover the rack housing 10 and the upper opening of the yoke hole 11 is provided. From the upper ball arbor 22, the two ball arbors 21 and 22 are integrally connected, and then the holder 24 is fixed to the tip of the upper ball arbor 22 using pins 26 or the like. The reference chucking is first completed. As soon as the upper ball arbor 22 and the lower ball arbor 21 are coupled, the corresponding rotating ball portion of the upper ball arbor 22 is also accurately positioned in the corresponding bearing insert A in the yoke hole 11, of course. to be.

여기서, 상기 상측 볼 아버(22) 상단부 둘레에는 일정 깊이의 브이(V)자형 홈이 새겨져 있어서 홀더(24) 일측의 구멍을 통해 적정 규격의 핀(26)을 삽입하기만 하면 상호 일체화되는 구조이다. 이 또한, 작업용이화를 기할 수 있는 한 다른 형상이라도 무방하다.Here, a V-shaped groove having a predetermined depth is engraved around the upper end of the upper ball arbor 22 so as to be integrated with each other by simply inserting a pin 26 having a proper size through a hole on one side of the holder 24. to be. This may also be any other shape as long as it is easy to work with.

이어서, 홀더(24)에 장착된 상기 레버(23)의 외향 절곡된 하단부 선단이 요오크홀(11)의 상단부 내벽면에 접촉되도록 위치조정 및 고정시킨 후, 레버(23) 상단면에 다이얼 게이지(25) 또는 전자식 계기 등의 탐침(探針)을 세팅(Setting)함으로써 동심도 측정·검사작업 준비를 완료하게 된다.Subsequently, the outwardly bent lower end of the lever 23 mounted on the holder 24 is positioned and fixed so as to contact the inner wall surface of the upper end of the yoke hole 11, and then the dial gauge on the upper surface of the lever 23. (25) or by setting a probe such as an electronic instrument, the preparation for the concentricity measurement and inspection work is completed.

상기 준비작업이 완료된 상태에서, 작업자가 홀더(24)를 잡아 회전시키게 되면, 상기 레버(23)의 하측 선단 역시 상기 요오크홀(11) 상단부 내벽을 따라 회전하는 동안 해당 요오크홀(11)내 상기 베어링 삽입부(A, B)가 갖는 동심도 내지는 진도를 상기 탐침을 통해 알려주게 된다. 이는, 실제 차량주행시 요오크의 운동상황을 상기 2개의 볼 아버(21, 22)가 시연하는 것으로 볼 수 있기 때문이다. 결국, 가상적 실제상황하에서의 상기 동심도 측정은 매우 간단한 작업임에도 불구하고 완벽할 정도의 정확도를 지니게 된다.In the state where the preparation is completed, when the operator grabs the holder 24 and rotates it, the lower end of the lever 23 also rotates along the inner wall of the upper end of the yoke hole 11 while the corresponding yoke hole 11 The concentricity or the magnitude of the bearing inserts (A, B) in the interior will be informed through the probe. This is because the two ball arbors 21 and 22 demonstrate the motion state of the yoke when the vehicle is actually driven. As a result, the concentricity measurement in a virtual real situation has perfect accuracy despite being a very simple task.

한 가지 중요한 것은, 본 발명의 랙하우징용 동심도 측정구에 의한 상기 동심도 측정·검사작업은 따로 3차원 측정실 등에서 실시할 필요가 없다는 사실이다. 즉, 차량 조립작업 현장에서 작업자가 필요시 간편히 사용하면 된다. 서두에서 언급한 바와 같이, 측정·검사를 위한 운반작업 등이 불필요하게 됨을 고려할 때 대단한 공수 및 원가절감의 효과를 가져옴은 물론이다.One important thing is that the concentricity measurement and inspection work by the concentricity measuring instrument for rack housing of the present invention does not need to be carried out separately in a three-dimensional measuring room or the like. In other words, the operator can simply use when necessary in the vehicle assembly work site. As mentioned at the outset, it is a matter of course that a great deal of labor and cost savings are taken into consideration, considering that the transportation work for measurement and inspection becomes unnecessary.

이상 설명한 바와 같이, 본 발명의 랙하우징용 동심도 측정구는, 랙하우징내 요오크홀의 동심도 측정·검사작업을 용이하게 하는 동시에 측정정확도 향상을 가져오는 효과가 있다.As described above, the concentricity measuring instrument for rack housings of the present invention facilitates concentricity measurement and inspection of the yoke hole in the rack housing, and has an effect of improving measurement accuracy.

아울러, 측정을 위한 운반작업을 배제함에 따른 상당한 공수 및 원가절감을 기할 수 있다.In addition, significant man-hours and cost savings can be achieved by excluding transport operations for measurement.

Claims (5)

소형 레버(23)가 부착된 홀더(24)와, 랙하우징(10)의 요오크홀(11)내 베어링 삽입부(A)와 일치하는 치수의 회전볼 부분을 구비하며 그 상단부에 상기 홀더(24)가 결합되는 상측 볼 아버(22)와, 요오크홀(11)내 또다른 베어링 삽입부(B)와 일치하는 치수의 회전볼 부분을 구비하며 상기 상측 볼 아버(22) 하단부에 연결되는 하측 볼아버(21)를 포함하여 구성된 것을 특징으로 하는 랙하우징용 동심도 측정구.A holder 24 to which the small lever 23 is attached, and a rotating ball portion having a dimension corresponding to the bearing insertion portion A in the yoke hole 11 of the rack housing 10, and at the upper end thereof; 24 has an upper ball arbor 22 to which it is coupled, and a rotating ball portion having a dimension matching with another bearing insert B in the yoke hole 11 and connected to a lower end of the upper ball arbor 22. Concentricity measuring sphere for the rack housing, characterized in that comprises a lower ball arbor (21). 제1항에 있어서, 상기 상측 볼 아버(22)의 하단부 및 하측 볼 아버(21)의 상단부가 서로 일치하는 형상의 돌기부 및 홈부로 각각 형성된 것을 특징으로 하는 랙하우징용 동심도 측정구.The concentricity measuring instrument for rack housing according to claim 1, wherein the lower end portion of the upper ball arbor (22) and the upper end portion of the lower ball arbor (21) are formed of protrusions and grooves having a shape corresponding to each other. 제1항에 있어서, 상기 상측 볼 아버(22)의 상단부 둘레에 홈을 형성하고, 상기 홀더(24) 일측을 관통하는 핀 구멍을 형성한 것을 특징으로 하는 랙하우징용 동심도 측정구.The concentricity measuring instrument for rack housing according to claim 1, wherein a groove is formed around an upper end of the upper ball arbor (22), and a pin hole penetrates one side of the holder (24). 제1항에 있어서, 상기 레버(23)가 외향 절곡된 선단부를 가지며 상기 홀더(24)에 대해 위치조정 가능한 구조인 것을 특징으로 하는 랙하우징용 동심도 측정구.The concentricity measuring tool for rack housing according to claim 1, wherein the lever (23) has a tip portion that is bent outwardly and is adjustable in position with respect to the holder (24). 제1항, 제3항 또는 제4항에 있어서, 상기 홀더(24)의 외주부가 너얼링 가공된 것을 특징으로 하는 랙하우징용 동심도 측정구.The concentricity measuring instrument for rack housing according to claim 1, 3 or 4, wherein an outer circumferential portion of the holder (24) is kneaded.
KR1019970077255A 1997-12-29 1997-12-29 Device for measuring concentricity for rack housing KR100383647B1 (en)

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