JP2016090458A - Airtightness testing jig - Google Patents

Airtightness testing jig Download PDF

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JP2016090458A
JP2016090458A JP2014226873A JP2014226873A JP2016090458A JP 2016090458 A JP2016090458 A JP 2016090458A JP 2014226873 A JP2014226873 A JP 2014226873A JP 2014226873 A JP2014226873 A JP 2014226873A JP 2016090458 A JP2016090458 A JP 2016090458A
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case
sealing member
input shaft
elastic sealing
cap
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JP6439392B2 (en
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敏 畠山
Satoshi Hatakeyama
敏 畠山
八束 石橋
Yatsuka Ishibashi
八束 石橋
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JTEKT Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a testing jig for airtightness test which is superior in repeated durability and has reliable sealing performance and is capable of accurate measurement in airtightness test for a power steering device.SOLUTION: The testing jig comprises a substantially cylindrical case 1 which has a plurality of stepped surfaces on an inner periphery thereof and has one end closed, a substantially cylindrical cap 2 which is engaged with the case 1 by screwing and is relatively rotatable, and a substantially cylindrical elastic sealing member 3 which is stored in the case 1 and has both end surfaces interposed between a case stepped surface 4 and a cap end surface 5. When an end of an input shaft 21 is inserted to a space in the testing jig, the input shaft 21 has a pinhole 24 positioned within a width of the elastic sealing member 3 in an axial direction, and the elastic sealing member 3 is compressed in the axial direction and is expanded toward an axial center in a radial direction by screwing the cap 2 into the case 1, and thus an elastic sealing member inner periphery 7 is compressed to an input shaft outer periphery 27 to close and seal the pinhole 24.SELECTED DRAWING: Figure 2

Description

本発明は、パワーステアリング装置の製造工程で使用する気密性試験治具に関するものである。   The present invention relates to an airtightness test jig used in a manufacturing process of a power steering device.

特許文献１には、ステアリング部品であるモータハウジングの気密性試験において、被検査物の一部に外部からカバーを被せることによりその部分の気密性を確保し、それ以外の部分の気密性試験を行う方法が示されている。   In Patent Literature 1, in a hermeticity test of a motor housing that is a steering component, a part of an object to be inspected is covered with a cover from the outside to ensure the airtightness of that part, and the airtightness test of other parts is performed. It shows how to do it.

パワーステアリング装置には、トーションバーを備えた操舵トルク検出部分が設けられている。トーションバーはインプットシャフトとの間を貫通する穴に圧入されたピンで連結されている。このため、パワーステアリング装置の気密性試験を行う際に、このピン穴からの空気漏れを予め遮断しておく必要がある。   The power steering device is provided with a steering torque detection portion having a torsion bar. The torsion bar is connected with a pin press-fitted into a hole penetrating the input shaft. For this reason, when performing the airtightness test of the power steering device, it is necessary to block air leakage from the pin hole in advance.

従来は、図３に示すように、略円筒状のケース４１の一方の開口端面にパッキン４３を挟んでカバー４２をボルト４４で固定して開口部を閉じ、ケース４１及びカバー４２の内周にＯリング４５、４６を装着した試験治具をインプットシャフト２１の突出部分に被せる。この時、インプットシャフト２１の外周と試験治具内周との間でＯリング４５、４６の緊迫力が作用して試験治具の内部空間と外部空間との間を密封し、ピン穴２４及びインプットシャフト先端部から外部空間への空気漏れを防止している。   Conventionally, as shown in FIG. 3, a cover 42 is fixed with bolts 44 with a packing 43 sandwiched between one opening end face of a substantially cylindrical case 41, and the opening is closed. A test jig equipped with O-rings 45 and 46 is put on the protruding portion of the input shaft 21. At this time, the tight force of the O-rings 45 and 46 acts between the outer periphery of the input shaft 21 and the inner periphery of the test jig to seal between the inner space and the outer space of the test jig, Air leakage from the tip of the input shaft to the outside space is prevented.

特開２００７−２２０４７８号公報JP 2007-220478 A

しかし従来技術では、試験治具の着脱時にＯリングがインプットシャフト外周との間で摺動摩擦作用を受けて摩耗するため、繰り返し使用における耐久性と密封性に問題があった。本発明は、パワーステアリング装置の気密性試験において、繰り返し耐久性に優れ確実な密封性を有し正確な測定が可能な気密性試験治具を提供することを目的とする。   However, in the prior art, when the test jig is attached / detached, the O-ring is worn due to sliding friction with the outer periphery of the input shaft, so there is a problem in durability and sealing performance in repeated use. An object of the present invention is to provide an airtightness test jig that has excellent durability and reliability and can perform accurate measurement in an airtightness test of a power steering device.

上記の課題を解決するため、請求項１に係る発明の構成上の特徴は、一方に閉口端を有し他方の開口端の内周に雌ねじが形成され内周に複数の段面を有する略円筒状のケースと、前記ケース内に配置され、外周及び一端面が前記ケースの内周及び段面に当接する略円筒状の弾性密封部材と、前記雌ねじと螺合する雄ねじを外周に形成され前記ケース内に螺入され端面が前記弾性密封部材の他端面に当接する略円筒状のキャップとからなり、半径方向に貫通するピン穴に圧入されたピンで結合されたトーションバーを内通空間に収容するインプットシャフトの一部を、前記ケース、前記弾性密封部材及び前記キャップの軸心空間に挿入することにより、挿入された前記インプットシャフトの一部を外部空間から遮断、密封する気密性試験治具であって、前記弾性密封部材は、その幅の範囲内に前記ピン穴を収める位置にあって、前記ケースに外周及び一端面を拘束され、螺入される前記キャップの端面に他端面を押圧されることにより、軸方向に収縮すると同時に半径方向軸心側に膨張し、インプットシャフトの外径に圧接して前記ピン穴を塞ぎ密封することである。   In order to solve the above-described problem, the structural feature of the invention according to claim 1 is that it has a closed end on one side, a female screw is formed on the inner periphery of the other open end, and a plurality of step surfaces on the inner periphery. A cylindrical case, a substantially cylindrical elastic sealing member disposed in the case, the outer periphery and one end surface of which are in contact with the inner periphery and the step surface of the case, and a male screw that is screwed with the female screw are formed on the outer periphery. A torsion bar that is screwed into the case and includes a substantially cylindrical cap whose end surface is in contact with the other end surface of the elastic sealing member, and that is coupled with a pin that is press-fitted into a pin hole that penetrates in the radial direction. A part of the input shaft housed in the case is inserted into the axial space of the case, the elastic sealing member and the cap, thereby sealing and sealing the part of the inserted input shaft from the external space. With a jig Thus, the elastic sealing member is in a position where the pin hole is accommodated within the range of the width thereof, the outer periphery and one end face are restrained by the case, and the other end face is pressed against the end face of the cap to be screwed. In other words, it contracts in the axial direction and simultaneously expands toward the radial axial center, and presses against the outer diameter of the input shaft to close and seal the pin hole.

上記のように構成した請求項１に係る発明によれば、弾性密封部材の密封圧力が試験治具の重量により円周方向で不均一になることなく、インプットシャフトのピン穴両端を均等な圧力で密封してピン穴からの空気漏れを確実に防止することができる。また試験治具の着脱時に、弾性密封部材がインプットシャフトの外周との間で摩擦摺動することがないため、弾性密封部材内周の摩耗発生がなく、繰り返し使用における耐久性が向上する。   According to the invention according to claim 1 configured as described above, the pressure of the elastic sealing member is not uniform in the circumferential direction due to the weight of the test jig, and the pressure on both ends of the pin hole of the input shaft is equal. By sealing with, air leakage from the pin hole can be surely prevented. Further, since the elastic sealing member does not slide frictionally with the outer periphery of the input shaft when the test jig is attached / detached, there is no occurrence of wear on the inner periphery of the elastic sealing member, and durability in repeated use is improved.

上記の課題を解決するため、請求項２に係る発明の構成上の特徴は、前記弾性密封部材が、変形性、復元性が高く、密封性に富むウレタン樹脂からなることである。   In order to solve the above-described problem, a structural feature of the invention according to claim 2 is that the elastic sealing member is made of a urethane resin having high deformability and high resilience and high sealing performance.

上記のように構成した請求項２に係る発明によれば、ウレタン樹脂を使用することにより、高い変形性と復元性により、インプットシャフトのピン穴における密封性を確実にするとともに、密封解除と試験治具のインプットシャフトからの着脱を容易にすることができる。   According to the invention according to claim 2 configured as described above, by using urethane resin, the sealability in the pin hole of the input shaft is ensured by high deformability and recoverability, and the seal release and test are performed. The jig can be easily detached from the input shaft.

上記の課題を解決するため、請求項３に係る発明の構成上の特徴は、前記ケースの外周及び前記キャップの外周の一部に、すべりを防止する凹凸加工が施されていることを特徴とすることである。   In order to solve the above-mentioned problem, the structural feature of the invention according to claim 3 is characterized in that the outer periphery of the case and a part of the outer periphery of the cap are subjected to uneven processing for preventing slipping. It is to be.

上記のように構成した請求項３に係る発明によれば、試験治具をインプットシャフトに装着後キャップをケースにねじ込む際に、キャップ外周或いはケース外周を掴んだ指が凹凸加工により滑ることなく、軽い力でキャップ及びケースを相対回転させて容易にねじ込む、或いは緩めることができる。   According to the invention according to claim 3 configured as described above, when the test jig is mounted on the input shaft and the cap is screwed into the case, the finger gripping the outer periphery of the cap or the outer periphery of the case does not slip due to uneven processing, The cap and the case can be rotated relative to each other with a light force to be easily screwed or loosened.

上述のように本発明の実施形態によれば、パワーステアリング装置の気密性試験において、繰り返し耐久性に優れ確実な密封性を有し正確な測定が可能な気密性試験治具を提供することができる。   As described above, according to the embodiment of the present invention, it is possible to provide an airtightness test jig that has excellent durability and reliable sealing performance and can perform accurate measurement in an airtightness test of a power steering device. it can.

本発明の実施形態における気密性試験治具を電動パワーステアリング装置のインプットシャフトに装着した状態の断面図である。It is sectional drawing of the state which mounted | wore the input shaft of the electric power steering apparatus with the airtightness test jig | tool in embodiment of this invention. 図１の拡大断面図である。It is an expanded sectional view of FIG. 従来の気密性試験治具インプットシャフトに装着した状態の断面図である。It is sectional drawing of the state with which the conventional airtightness test jig input shaft was mounted | worn.

この発明の実施形態を、以下、図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

まず、図１を参照して、本発明の実施形態における気密性試験治具にインプットシャフトを装着した状態における主要構成を説明する。   First, with reference to FIG. 1, the main structure in the state which attached the input shaft to the airtightness test jig | tool in embodiment of this invention is demonstrated.

気密性試験治具は、それぞれ略円筒状のケース１、キャップ２及び弾性密封部材３が同一軸線上に組み合わされている。インプットシャフト２１は、外周にトルクセンサ３１を配置され、軸受３３で支持されてハウジング３２に収容されている。軸受３３の外側のインプットシャフト２１とハウジング３２の間にはシール３４が設置され、ハウジング３２の内部空間と外部空間とを遮断し密封している。   In the airtightness test jig, a substantially cylindrical case 1, a cap 2 and an elastic sealing member 3 are combined on the same axis. The input shaft 21 has a torque sensor 31 disposed on the outer periphery, is supported by a bearing 33 and is accommodated in a housing 32. A seal 34 is installed between the input shaft 21 outside the bearing 33 and the housing 32, and the internal space and the external space of the housing 32 are blocked and sealed.

インプットシャフト２１のシール３４から突出した部分には全体を覆うように気密性試験治具が被せられている。インプットシャフト外周２６、２７、２８は、キャップ２、弾性密封部材３及びケース１の内周との間ですきまを有しており、気密性試験治具は、インプットシャフト２１に対して容易に着脱可能である。   A portion of the input shaft 21 protruding from the seal 34 is covered with an airtightness test jig so as to cover the whole. The input shaft outer periphery 26, 27, 28 has a gap between the cap 2, the elastic sealing member 3, and the inner periphery of the case 1, and the airtightness test jig can be easily attached to and detached from the input shaft 21. Is possible.

次に、図２を参照して、本発明の実施形態における気密性試験治具の詳細構造について説明する。   Next, with reference to FIG. 2, the detailed structure of the airtightness test jig | tool in embodiment of this invention is demonstrated.

ケース１は、一端を閉じた略円筒状の部材であり、内部にインプットシャフト２１の突出部を収容する空間を有し、内周にケース段面４及びケース段面８が設けられている。開口端の内周には、雌ねじ９が設けられている。また、ケース１の閉口端の外周にはローレット１６が施されている。   The case 1 is a substantially cylindrical member with one end closed, has a space for accommodating the protruding portion of the input shaft 21 inside, and is provided with a case step surface 4 and a case step surface 8 on the inner periphery. A female screw 9 is provided on the inner periphery of the open end. A knurling 16 is provided on the outer periphery of the closed end of the case 1.

ケース段面４は、弾性密封部材３がケース1に装着される際に弾性密封部材端面１７が当接して、弾性密封部材３の軸方向位置が定まる。ケース段面８は、インプットシャフト２１の挿入時にインプットシャフト段面２５が当接して、インプットシャフト２１とケース１の相対位置が定まる。   When the elastic sealing member 3 is attached to the case 1, the case step surface 4 comes into contact with the elastic sealing member end surface 17, and the axial position of the elastic sealing member 3 is determined. The case step surface 8 comes into contact with the input shaft step surface 25 when the input shaft 21 is inserted, and the relative position between the input shaft 21 and the case 1 is determined.

キャップ２は、軸心にインプットシャフト２１が挿入可能な貫通穴を有する略円筒状の部材であり、大部分がケース１内に収容される。キャップ端面５は、ケース１内で弾性密封部材端面１８と当接する。キャップ２の外周には雄ねじ１０が形成されており、ケース１の内周に形成された雌ねじ９と螺合する。ケース１に収容されないキャップ２の端部にフランジ１４が設けられており、フランジ１４の外周にローレット１５が施されている。   The cap 2 is a substantially cylindrical member having a through hole into which the input shaft 21 can be inserted in the axial center, and most of the cap 2 is accommodated in the case 1. The cap end surface 5 contacts the elastic sealing member end surface 18 in the case 1. A male screw 10 is formed on the outer periphery of the cap 2 and is screwed with a female screw 9 formed on the inner periphery of the case 1. A flange 14 is provided at the end of the cap 2 that is not accommodated in the case 1, and a knurl 15 is provided on the outer periphery of the flange 14.

弾性密封部材３は、変形性、復元性及び密封性に優れたウレタン樹脂で形成された略円筒状の部材で、ケース１内に設置されている。弾性密封部材外周１９は、ケース内周６に当接して外周方向に拘束され、弾性密封部材端面１７、１８は、ケース段面４及びキャップ端面５に当接され軸方向に拘束されている。弾性密封部材内周７は相対するインプットシャフト外周２７との間にすきまを有している。弾性密封部材３の軸方向幅は、ピン穴２４の内径よりも大きく、ピン穴２４は弾性密封部材３の軸方向幅の範囲内に位置している。   The elastic sealing member 3 is a substantially cylindrical member formed of a urethane resin excellent in deformability, restoration property and sealing property, and is installed in the case 1. The elastic sealing member outer periphery 19 abuts on the case inner periphery 6 and is restrained in the outer peripheral direction, and the elastic sealing member end surfaces 17 and 18 abut on the case step surface 4 and the cap end surface 5 and are restrained in the axial direction. The elastic sealing member inner periphery 7 has a clearance between the opposing input shaft outer periphery 27. The axial width of the elastic sealing member 3 is larger than the inner diameter of the pin hole 24, and the pin hole 24 is located within the range of the axial width of the elastic sealing member 3.

インプットシャフト２１は、軸心を内通する空間に挿入され先端部分を圧入されたトーションバー２２との間で、インプットシャフト外周２７から半径方向に貫通するピン穴２４圧入されたピン２３により結合され、軸方向及び円周方向に固定されている。インプットシャフト２１の先端付近に、試験治具装着時にケース段面８に当接するインプットシャフト段面２５を有している。   The input shaft 21 is coupled to a torsion bar 22 inserted into a space passing through the shaft center and press-fitted at a tip portion thereof by a pin 23 that is press-fitted in a pin hole 24 that penetrates radially from the outer periphery 27 of the input shaft. It is fixed in the axial direction and the circumferential direction. Near the tip of the input shaft 21, there is an input shaft step surface 25 that comes into contact with the case step surface 8 when the test jig is mounted.

次に、本発明の実施形態における気密性試験治具の作用について、説明する。
電動パワーステアリング装置の製造工程における気密性試験において、予めハウジング３２から突出したインプットシャフト２１からの空気漏れを防いでおく必要がある。そのため試験治具をインプットシャフト２１の突出部分に被せて挿入するが、その際インプットシャフト段面２５がケース段面８に当接するまでインプットシャフト２１を挿入する。 Next, the effect | action of the airtightness test jig | tool in embodiment of this invention is demonstrated.
In the airtightness test in the manufacturing process of the electric power steering apparatus, it is necessary to prevent air leakage from the input shaft 21 protruding from the housing 32 in advance. Therefore, the test jig is inserted over the projecting portion of the input shaft 21, and at this time, the input shaft 21 is inserted until the input shaft step surface 25 comes into contact with the case step surface 8.

インプットシャフト段面２５がケース段面８に当接した時点で、雌ねじ９及び雄ねじ１０を相対回転させてケース１に対してキャップ２をねじ込む。この時、ケース１のローレット１６及びキャップ２のローレット１５がそれぞれの外周面におけるすべりを防止し、キャップ２のケース１へのねじ込みを容易にする。   When the input shaft step surface 25 comes into contact with the case step surface 8, the female screw 9 and the male screw 10 are relatively rotated to screw the cap 2 into the case 1. At this time, the knurls 16 of the case 1 and the knurls 15 of the cap 2 prevent slipping on the respective outer peripheral surfaces, thereby facilitating screwing of the cap 2 into the case 1.

弾性密封部材３は、端面１７、１８をケース段面４及びキャップ端面５により軸方向に圧縮され半径方向に膨張しようとするが、外周１９をケース内周６に拘束されているため、すきまがある内周方向に膨張する。膨張した弾性密封部材内周７がインプットシャフト外周２７に当接し、インプットシャフト外周２７に開口しているピン穴２４を塞ぐ。   The elastic sealing member 3 tends to expand in the radial direction by compressing the end surfaces 17 and 18 in the axial direction by the case step surface 4 and the cap end surface 5, but the outer periphery 19 is constrained by the case inner periphery 6. It expands in a certain inner circumferential direction. The expanded inner periphery 7 of the elastic sealing member abuts on the outer periphery 27 of the input shaft and closes the pin hole 24 opened in the outer periphery 27 of the input shaft.

弾性密封部材３は、キャップ２の更なるねじ込みによりケース段面４、ケース内周６、キャップ端面５及びインプットシャフト外周２７に圧接し、ピン穴２４を密封する。この時、弾性密封部材３は、全周に亘って圧接しておりかつ一定の軸方向幅による広い面積で試験治具の重量を支持するため、密封部材にＯリングを使用する場合に比べて、試験治具の重量による密封性の円周方向ばらつきは、格段に小さい。   The elastic sealing member 3 is pressed against the case step surface 4, the case inner periphery 6, the cap end surface 5, and the input shaft outer periphery 27 by further screwing of the cap 2 to seal the pin hole 24. At this time, the elastic sealing member 3 is in pressure contact over the entire circumference and supports the weight of the test jig over a wide area with a certain axial width, so compared to the case where an O-ring is used as the sealing member. The variation in the circumferential direction of the sealing performance due to the weight of the test jig is extremely small.

また弾性密封部材３は、ケース段面４、ケース内周６及びインプットシャフト外周２７に圧接するため、ケース１の内部空間の閉口部側と開口部側とを遮断、密封する。従って仮に、ピン穴２４より先端側のインプットシャフト２１の内周に溝２９が形成されている場合など、ピン穴２４より先端側で空気漏れが発生しても、漏れた空気はケース１の内部空間の閉口部側に封じ込められ、外部に漏れることはない。   Further, since the elastic sealing member 3 is pressed against the case step surface 4, the case inner periphery 6 and the input shaft outer periphery 27, the closed portion side and the opening portion side of the internal space of the case 1 are blocked and sealed. Therefore, even if a groove 29 is formed on the inner periphery of the input shaft 21 on the tip side from the pin hole 24, even if air leaks on the tip side from the pin hole 24, the leaked air remains inside the case 1. It is sealed on the closed side of the space and does not leak outside.

試験治具を装着した後、電動パワーステアリング装置内に空気を導入し、空気漏れの有無を確認して気密性試験を実施する。試験後、キャップ２を回転させてケース１との螺合を緩める。弾性密封部材３は、両端面１７，１８に対するケース段面４及びキャップ端面５からの押圧を解除され、復元性により軸方向に膨張し半径方向に収縮する。弾性密封部材内周７は、圧接していたインプットシャフト外周２７から離間し、ピン穴２４の密封は解除される。その後試験治具は、インプットシャフト２１から分離離脱される。   After mounting the test jig, air is introduced into the electric power steering device, and the presence or absence of air leakage is confirmed and an airtightness test is performed. After the test, the cap 2 is rotated to loosen the screw with the case 1. The elastic sealing member 3 is released from pressing from the case step surface 4 and the cap end surface 5 against the both end surfaces 17 and 18 and expands in the axial direction and contracts in the radial direction due to its resilience. The inner periphery 7 of the elastic sealing member is separated from the outer periphery 27 of the input shaft that has been in pressure contact, and the sealing of the pin hole 24 is released. Thereafter, the test jig is separated and separated from the input shaft 21.

弾性密封部材３は、インプットシャフト２１の外周から径方向に離間した状態で、試験治具が軸方向に脱着される。従って、密封部材としてＯリングを使用する場合のように、インプットシャフト２１の外周との間で摺動摩擦作用を受けることがないため、密封作用を担う弾性密封部材内周７が摩耗する恐れがない。また弾性密封部材３は、変形性、復元性に優れたウレタン樹脂で形成されているため、繰り返し使用による耐久性にも優れている。   In the elastic sealing member 3, the test jig is attached and detached in the axial direction in a state where the elastic sealing member 3 is radially separated from the outer periphery of the input shaft 21. Therefore, unlike the case where an O-ring is used as the sealing member, there is no risk of sliding friction between the outer periphery of the input shaft 21 and the inner periphery 7 of the elastic sealing member responsible for the sealing action is not worn. . Moreover, since the elastic sealing member 3 is formed of a urethane resin having excellent deformability and restoration property, it is excellent in durability due to repeated use.

上記の説明のように、本発明の実施形態によれば、パワーステアリング装置の気密性試験において、繰り返し耐久性に優れ確実な密封性を有し正確な測定が可能な気密性試験治具を提供することができる。   As described above, according to the embodiment of the present invention, in the airtightness test of the power steering device, there is provided an airtightness test jig which has excellent durability and reliable sealing performance and can perform accurate measurement. can do.

本発明は、上述の実施形態になんら限定されるものではなく。本発明の要旨を逸脱しない範囲において、種々なる様態で実施し得ることは勿論である。   The present invention is not limited to the embodiment described above. Needless to say, the present invention can be implemented in various modes without departing from the gist of the present invention.

１：ケース、 ２：キャップ、 ３：弾性密封部材、 ４：ケース段面、
５：キャップ端面、 ６：ケース内周、 ７：弾性密封部材内周、 ８：ケース段面、
９：雌ねじ、 １０：雄ねじ、 １１キャップ外径、 １２：ケース内周、
１３：ケース内周、 １４：フランジ、 １５、１６：ローレット、
１７、１８：弾性密封部材端面、 １９：弾性密封部材外周、
２１：インプットシャフト、 ２２：トーションバー、 ２３：ピン、 ２４：ピン穴、 ２５：インプットシャフト段面、 ２６、２７、２８：インプットシャフト外周、
２９：溝、 ３１：トルクセンサ、 ３２：ハウジング、 ３３：軸受、 ３４：シール 1: Case, 2: Cap, 3: Elastic sealing member, 4: Case step surface,
5: Cap end surface, 6: Case inner periphery, 7: Elastic sealing member inner periphery, 8: Case step surface,
9: Female thread, 10: Male thread, 11 Cap outer diameter, 12: Case inner circumference,
13: Case inner circumference, 14: Flange, 15, 16: Knurling,
17, 18: elastic sealing member end surface, 19: elastic sealing member outer periphery,
21: input shaft, 22: torsion bar, 23: pin, 24: pin hole, 25: input shaft step surface, 26, 27, 28: outer periphery of input shaft,
29: Groove, 31: Torque sensor, 32: Housing, 33: Bearing, 34: Seal

Claims (3)

一方に閉口端を有し他方の開口端の内周に雌ねじが形成され内周に複数の段面を有する略円筒状のケースと、前記ケース内に配置され、外周及び一端面が前記ケースの内周及び段面に当接する略円筒状の弾性密封部材と、前記雌ねじと螺合する雄ねじを外周に形成され前記ケース内に螺入され端面が前記弾性密封部材の他端面に当接する略円筒状のキャップとからなり、半径方向に貫通するピン穴に圧入されたピンで結合されたトーションバーを内通空間に収容するインプットシャフトの一部を、前記ケース、前記弾性密封部材及び前記キャップの軸心空間に挿入することにより、挿入された前記インプットシャフトの一部を外部空間から遮断、密封する気密性試験治具であって、
前記弾性密封部材は、その幅の範囲内に前記ピン穴を収める位置にあって、前記ケースに外周及び一端面を拘束され、螺入される前記キャップの端面に他端面を押圧されることにより、軸方向に収縮すると同時に半径方向軸心側に膨張し、インプットシャフトの外径に圧接して前記ピン穴を塞ぎ密封することを特徴とする気密性試験治具。 A substantially cylindrical case having a closed end on one side and a female screw formed on the inner periphery of the other open end and having a plurality of step surfaces on the inner periphery, and an outer periphery and one end surface of the case A substantially cylindrical elastic sealing member that comes into contact with the inner periphery and the step surface, and a substantially cylindrical member that has a male screw threadedly engaged with the female screw formed on the outer periphery and is screwed into the case and has an end face in contact with the other end surface of the elastic sealing member A portion of the input shaft that accommodates in the internal space a torsion bar that is joined with a pin that is press-fitted into a pin hole that penetrates in the radial direction. The case, the elastic sealing member, and the cap An air-tightness test jig that seals and seals a part of the inserted input shaft from the external space by inserting it into the axial space,
The elastic sealing member is in a position where the pin hole is accommodated within the range of the width thereof, and the outer periphery and one end surface are restrained by the case, and the other end surface is pressed against the end surface of the cap to be screwed An airtightness testing jig characterized by contracting in the axial direction and simultaneously expanding toward the radial axial center, sealing the pin hole by pressing against the outer diameter of the input shaft. 前記弾性密封部材が、変形性、復元性が高く、密封性に富むウレタン樹脂からなることを特徴とする請求項１に記載の気密性試験治具。   The airtight test jig according to claim 1, wherein the elastic sealing member is made of a urethane resin having high deformability and high resilience and high sealing performance. 前記ケースの外周及び前記キャップの外周の一部に、すべりを防止する凹凸加工が施されていることを特徴とする請求項１または２に記載の気密性試験治具。   3. The airtightness test jig according to claim 1, wherein the outer periphery of the case and a part of the outer periphery of the cap are subjected to uneven processing for preventing slipping.
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CN108827606A (en) * 2018-04-04 2018-11-16 中国航发湖南动力机械研究所 Casing hydrostatic power pressure experimental rig
CN109632196A (en) * 2019-01-16 2019-04-16 沈阳飞机工业（集团）有限公司 For testing thin-walled parts air-tightness universal fixturing
CN114754946A (en) * 2022-05-07 2022-07-15 无锡吉冈精密科技股份有限公司 New energy automobile turns to motor casing gas tightness testing arrangement
CN115901099A (en) * 2023-01-05 2023-04-04 中科摩通(常州)智能制造股份有限公司 Heat pump air tightness detection device and detection method thereof

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Publication number Priority date Publication date Assignee Title
JP2016176695A (en) * 2015-03-18 2016-10-06 株式会社ジェイテクト Airtightness testing jig
CN107402109A (en) * 2017-09-06 2017-11-28 重庆科技学院 A kind of method of follow-on test special thread sealing surface released gas rate
CN107402109B (en) * 2017-09-06 2023-06-23 重庆科技学院 Method for continuously testing gas leakage rate of special thread sealing surface
CN108827606A (en) * 2018-04-04 2018-11-16 中国航发湖南动力机械研究所 Casing hydrostatic power pressure experimental rig
CN108827606B (en) * 2018-04-04 2020-06-23 中国航发湖南动力机械研究所 Static pressure test device for casing
CN108458843A (en) * 2018-04-25 2018-08-28 上汽时代动力电池系统有限公司 A kind of battery pack automation airtight test device
CN109632196A (en) * 2019-01-16 2019-04-16 沈阳飞机工业（集团）有限公司 For testing thin-walled parts air-tightness universal fixturing
CN109632196B (en) * 2019-01-16 2024-01-23 沈阳飞机工业（集团）有限公司 Universal clamp for testing air tightness of thin-wall part
CN114754946A (en) * 2022-05-07 2022-07-15 无锡吉冈精密科技股份有限公司 New energy automobile turns to motor casing gas tightness testing arrangement
CN114754946B (en) * 2022-05-07 2023-10-31 无锡吉冈精密科技股份有限公司 New energy automobile turns to motor housing gas tightness testing arrangement
CN115901099A (en) * 2023-01-05 2023-04-04 中科摩通(常州)智能制造股份有限公司 Heat pump air tightness detection device and detection method thereof

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