JP2014151696A - Negative pressure booster - Google Patents

Negative pressure booster Download PDF

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JP2014151696A
JP2014151696A JP2013021222A JP2013021222A JP2014151696A JP 2014151696 A JP2014151696 A JP 2014151696A JP 2013021222 A JP2013021222 A JP 2013021222A JP 2013021222 A JP2013021222 A JP 2013021222A JP 2014151696 A JP2014151696 A JP 2014151696A
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shell half
tie rod
negative pressure
flange
seal groove
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JP6046507B2 (en
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Takahiro Yoshizawa
貴博 吉澤
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Nissin Kogyo Co Ltd
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Nissin Kogyo Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a negative pressure booster in which a coupling reception part for bearing a rear surface of a front shell half body is formed on a tie rod in an integrated manner, and a distance between the coupling reception part and an air tight connection part connected to a rear shell half body is regulated constant, the distance does not have to be adjusted therefore connection work of the front and rear shell half bodies by the tie rod, and attachment work of a master cylinder are facilitated, and in addition, coupling axial force between the coupling reception part and an attachment flange of the master cylinder is secured, and a through-hole of the front shell into which the tie rod is inserted is reliably sealed.SOLUTION: As a coupling reception part, a front flange 32 is formed on a tie rod 6 in an integrated manner. On at least one of facing surfaces of the front flange 32 and an attachment flange Ma1 of a master cylinder M, which face to a front shell half body 1a, an annular seal groove 38 for surrounding the tie rod 6 is formed. A seal member 39 contacting to the front shell half body 1a tightly is attached to the seal groove 38.

Description

本発明は，自動車のブレーキマスタシリンダの倍力作動のために用いられる負圧ブースタに関し，特に，椀状の前部シェル半体と，この前部シェル半体の後端部にダイヤフラムを挟んで前端部が対向する椀状の後部シェル半体と，これら前部及び後部シェル半体を軸方向に貫通しながらそれらを相互に連結するタイロッドとを備えてなり，そのタイロッドには，後部シェル半体に気密に結合される気密結合部と，前部シェル半体の後面を支承する締結受け部と，後部シェル半体及び，その前面に重ねられるマスタシリンダの取り付けフランジにそれぞれ設けられる透孔を貫通するボルト部と設け，前記締結受け部と協働して前部シェル半体及び前記取り付けフランジ間を締結するナットを前記ボルト部に螺着した負圧ブースタの改良に関する。   The present invention relates to a negative pressure booster used for boosting a brake master cylinder of an automobile, and in particular, a saddle-shaped front shell half and a rear end of the front shell half sandwiching a diaphragm. A saddle-shaped rear shell half whose front ends are opposed to each other, and a tie rod that passes through the front and rear shell halves in an axial direction and connects them to each other. The tie rod includes a rear shell half An airtight coupling portion that is airtightly coupled to the body, a fastening receiving portion that supports the rear surface of the front shell half, and a through hole provided in the mounting flange of the master cylinder that overlaps the rear shell half and the front surface thereof. The present invention relates to an improvement in a negative pressure booster that is provided with a penetrating bolt part, and that a nut for fastening between a front shell half and the mounting flange is screwed to the bolt part in cooperation with the fastening receiving part.

かゝる負圧ブースタは，特許文献１に開示されるように既に知られている。   Such a negative pressure booster is already known as disclosed in Patent Document 1.

特許第４６３８０５４号公報Japanese Patent No. 4638054

特許文献１に記載の負圧ブースタでは，前部シェル半体の後面を支承する締結受け部を，タイロッドに螺着したナットで構成しているので，タイロッドにより前部及び後部シェル半体を連結してブースタシェルの気密性を確保するためには，そのナットの螺合位置を調整して，そのナットと，後部シェル半体に結合した気密結合部との間の距離を規定通りに設定する必要があり，したがって部品点数が多い上，組立作業が面倒である。   In the negative pressure booster described in Patent Document 1, the fastening receiving portion for supporting the rear surface of the front shell half is composed of a nut screwed to the tie rod, so the front and rear shell halves are connected by the tie rod. In order to ensure the hermeticity of the booster shell, the screwing position of the nut is adjusted, and the distance between the nut and the hermetic joint connected to the rear shell half is set as specified. Therefore, the number of parts is large and the assembly work is troublesome.

本発明は，かゝる事情に鑑みてなされたもので，前部シェル半体の後面を支承する締結受け部をタイロッドに一体形成して，従来のようなナットの螺合位置の調整を不要にして，タイロッドによる前部及び後部シェル半体の連結作業，並びにマスタシリンダの取り付け作業の容易化を図り，また締結受け部タイロッドに一体形成したとしても，締結受け部とマスタシリンダの取り付けフランジとの間の締結軸力を確保しながら，タイロッドが貫通する前部シェルの透孔を確実にシールし得るようにした前記負圧ブースタを提供することを目的とする。   The present invention has been made in view of such circumstances, and a fastening receiving portion for supporting the rear surface of the front shell half is integrally formed with the tie rod, so that it is not necessary to adjust the screwing position of the nut as in the prior art. In this way, the front and rear shell halves can be easily connected with the tie rods and the master cylinder can be easily attached. Even if the fastening receiver tie rods are integrally formed, the fastening receiver and the master cylinder mounting flange It is an object of the present invention to provide the negative pressure booster that can surely seal the through hole of the front shell through which the tie rod penetrates while securing the fastening axial force therebetween.

上記目的を達成するために，本発明は，椀状の前部シェル半体と，この前部シェル半体の後端部にダイヤフラムを挟んで前端部が対向する椀状の後部シェル半体と，これら前部及び後部シェル半体を軸方向に貫通しながらそれらを相互に連結するタイロッドとを備えてなり，そのタイロッドには，後部シェル半体に気密に結合される気密結合部と，前部シェル半体の後面を支承する締結受け部と，後部シェル半体及び，その前端面に重ねられるマスタシリンダの取り付けフランジにそれぞれ設けられる透孔を貫通する前部ボルト部と設け，前記締結受け部と協働して前部シェル半体及び前記取り付けフランジ間を締結するナットを前部ボルト部に螺着した負圧ブースタにおいて，前記締結受け部として前部フランジをタイロッドに一体形成し，この前部フランジ及び前記取り付けフランジの少なくとも一方の，前部シェル半体との対向面に，タイロッドを囲繞する環状のシール溝を形成し，このシール溝に前部シェル半体に密接するシール部材を装着したことを第１の特徴とする。尚，前記気密結合部は，後述する本発明の実施形態中の後部フランジ３３に対応する。   In order to achieve the above object, the present invention comprises a bowl-shaped front shell half, and a bowl-shaped rear shell half with a front end opposed to the rear end of the front shell half. A tie rod that passes through the front and rear shell halves in an axial direction and interconnects the tie rods, the tie rods including an airtight coupling that is airtightly coupled to the rear shell halves, A fastening receiving portion for supporting the rear surface of the half shell half, a front bolt portion penetrating through the rear shell half and a through hole provided in a mounting flange of the master cylinder superimposed on the front end surface thereof, In the negative pressure booster in which a nut for fastening between the front shell half and the mounting flange is screwed to the front bolt part in cooperation with the part, the front flange is integrally formed with the tie rod as the fastening receiving part. An annular seal groove surrounding the tie rod is formed on a surface of at least one of the front flange and the mounting flange facing the front shell half, and the seal member is in close contact with the front shell half in the seal groove. The first feature is that the is mounted. The hermetic coupling portion corresponds to a rear flange 33 in an embodiment of the present invention described later.

また本発明は，第１の特徴に加えて，前記シール溝を，前記取り付けフランジの透孔の後縁部に形成されるテーパ面とタイロッドの外周面とで断面三角形状に画成し，このシール溝に前記シール部材としてのＯリングを装着したことを第２の特徴とする。   According to the present invention, in addition to the first feature, the seal groove is defined in a triangular shape by a tapered surface formed at a rear edge portion of the through hole of the mounting flange and an outer peripheral surface of the tie rod. A second feature is that an O-ring as the seal member is mounted in the seal groove.

さらに本発明は，第１又は第２の特徴に加えて，前記前部フランジを，その外径が前記シール溝の外径よりも大となるように形成したことを第３の特徴とする。   Furthermore, in addition to the first or second feature, the present invention has a third feature that the front flange is formed so that the outer diameter thereof is larger than the outer diameter of the seal groove.

本発明の第１の特徴によれば，締結受け部として前部フランジをタイロッドに一体形成したので，ブースタシェルの組立時，前部フランジ及び気密結合部間の距離調整を行う必要がなく，組立性が良好となり，延いてはタイロッドの前部ボルト部及びナットによるマスタシリンダの取り付けフランジの前部シェル半体への取り付けを容易に行うことができる。   According to the first feature of the present invention, since the front flange is integrally formed with the tie rod as the fastening receiving portion, it is not necessary to adjust the distance between the front flange and the airtight coupling portion when the booster shell is assembled. As a result, the front bolt portion and nut of the tie rod can be easily attached to the front shell half of the mounting flange of the master cylinder.

しかも，前部フランジ及び取り付けフランジの少なくとも一方の，前部シェル半体との対向面に，タイロッドを囲繞する環状のシール溝を形成し，このシール溝に前部シェル半体に密接するシール部材を装着したので，前部シェル半体への取り付けフランジの取り付けと同時にシール部材にシール圧力を付与し，前部シェル半体の透孔を確実にシールすることができる。   In addition, an annular seal groove surrounding the tie rod is formed on the surface facing at least one of the front flange and the mounting flange on the front shell half, and the seal member is in close contact with the front shell half in this seal groove. Since the mounting flange is attached to the front shell half, a sealing pressure is applied to the seal member at the same time as the mounting flange is attached to the front shell half, so that the through hole of the front shell half can be reliably sealed.

本発明の第２の特徴によれば，シール溝を，取り付けフランジの透孔の後縁部に形成されるテーパ面とタイロッドの外周面とで断面三角形状に画成し，このシール溝にシール部材としてのＯリングを装着したので，前記テーパ面は，Ｏリングを前部シェル半体の透孔に向かって押圧することになり，前部シェル半体の透孔に対するシール効果を効果的に高めることができる。   According to the second aspect of the present invention, the seal groove is defined in a triangular shape by a tapered surface formed at the rear edge of the through hole of the mounting flange and the outer peripheral surface of the tie rod, and a seal is formed in the seal groove. Since the O-ring as a member is mounted, the tapered surface presses the O-ring toward the through-hole of the front shell half, and effectively seals the through-hole of the front shell half. Can be increased.

本発明の第３の特徴によれば，前部フランジを，その外径がシール溝の外径よりも大となるように形成したので，シール溝の存在に拘らず，前部フランジと取り付けフランジとの間で締結軸力が確実に伝達して，前部シェル半体を強固に挟持すると共に，シール溝内のＯリングにシール圧力を確実に付与することができる。   According to the third aspect of the present invention, since the front flange is formed so that the outer diameter thereof is larger than the outer diameter of the seal groove, the front flange and the mounting flange are provided regardless of the presence of the seal groove. The fastening axial force can be reliably transmitted between the two, and the front shell half can be firmly clamped, and a seal pressure can be reliably applied to the O-ring in the seal groove.

本発明の第１実施形態に係る負圧ブースタの縦断面図。The longitudinal cross-sectional view of the negative pressure booster which concerns on 1st Embodiment of this invention. 図１の２部拡大図。FIG. 2 is an enlarged view of part 2 of FIG. 1. 本発明の第２実施形態を示す，図２との対応図。FIG. 3 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.

本発明の実施形態を添付図面に基づいて以下に説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

先ず，図１において，負圧ブースタＢのブースタシェル１は，それぞれ椀状に形成されて対向端を相互に結合される前部シェル半体１ａ及び後部シェル半体１ｂより構成される。これら前部シェル半体１ａ及び後部シェル半体１ｂは鋼板製であり，これらは，鋼材製の一対のタイロッド６（図１には，そのうちの一本のみを示す。）を介して結合される。一対のタイロッド６は，ブースタシェル１の中心軸線を挟んで並ぶように配置され，これらタイロッド６を利用して，前部シェル半体１ａの前面に，自動車のブレーキ用マスタシリンダＭのシリンダボディＭａの取り付けフランジＭａ１が締結され，またこれらタイロッド６を利用して，後部シェル半体１ｂが自動車の車体Ｆ前面に締結される。   First, in FIG. 1, the booster shell 1 of the negative pressure booster B is composed of a front shell half 1a and a rear shell half 1b that are each formed in a bowl shape and are connected to each other at opposite ends. The front shell half 1a and the rear shell half 1b are made of a steel plate, and they are coupled via a pair of steel tie rods 6 (only one of which is shown in FIG. 1). . The pair of tie rods 6 are arranged so as to sandwich the central axis of the booster shell 1, and by using these tie rods 6, on the front surface of the front shell half 1a, the cylinder body Ma of the master cylinder M for brakes of an automobile is arranged. And the rear shell half 1b is fastened to the front surface of the vehicle body F of the automobile by using these tie rods 6.

ブースタシェル１の内部は，両シェル半体１ａ，１ｂ間に挟止されるダイヤフラム５により，前側の負圧室２と後側の作動室３とに区画され，このダイヤフラム５の前面には，ブースタシェル１内を前後往復動可能なブースタピストン４が重ねて配設される。ダイヤフラム５には，ブースタピストン４の中間部を気密に貫通して前記タイロッド６上を摺動し得る筒状のスライドシール８が一体に形成されている。両シェル半体１ａ，１ｂの相対向する端部は，ダイヤフラム５の外周ビード部を挟止した状態で相互にカシメ結合される。   The inside of the booster shell 1 is partitioned into a negative pressure chamber 2 on the front side and a working chamber 3 on the rear side by a diaphragm 5 sandwiched between the two shell halves 1a and 1b. A booster piston 4 capable of reciprocating back and forth within the booster shell 1 is disposed in an overlapping manner. The diaphragm 5 is integrally formed with a cylindrical slide seal 8 that passes through an intermediate portion of the booster piston 4 in an airtight manner and can slide on the tie rod 6. The opposing ends of both shell halves 1a and 1b are caulked together with the outer peripheral bead portion of the diaphragm 5 being clamped.

ブースタピストン４及びダイヤフラム５の中心部には，樹脂製の弁筒１０が一体的に結合される。この弁筒１０は，後部シェル半体１ｂの中心部に後方へ突設された軸受筒１２に軸受ブッシュ９を介して摺動自在に支承される。   A resin valve cylinder 10 is integrally coupled to the central portions of the booster piston 4 and the diaphragm 5. The valve cylinder 10 is slidably supported via a bearing bush 9 on a bearing cylinder 12 protruding rearward from the center of the rear shell half 1b.

負圧室２は，負圧導入管１４及び逆止弁１９を介して負圧源Ｖ（例えば内燃機関の吸気マニホールド内部）と接続される。   The negative pressure chamber 2 is connected to a negative pressure source V (for example, inside the intake manifold of the internal combustion engine) via a negative pressure introduction pipe 14 and a check valve 19.

弁筒１０の後端部には，弁筒１０内に大気を導入する大気導入口７が設けられる。また弁筒１０内には，ブレーキペダルＰに連結される入力杆２０と，この入力杆２０の前後動に応じて作動室３を負圧室２と大気導入口７とに連通切換えする制御弁１１とが配設される。即ち，制御弁１１は，入力杆２０の後退時には，作動室３を，大気導入口７と遮断して負圧室２と連通し，入力杆２０の前進時には，作動室３を，負圧室２と遮断して大気導入口７と連通し得る公知の構成を有する。入力杆２０及び弁筒１０間には，入力杆２０を後退方向へ付勢する入力戻しばね１３が縮設される。   At the rear end portion of the valve cylinder 10, an air introduction port 7 for introducing air into the valve cylinder 10 is provided. Further, in the valve cylinder 10, an input rod 20 connected to the brake pedal P, and a control valve for switching the working chamber 3 to the negative pressure chamber 2 and the atmosphere introduction port 7 in accordance with the longitudinal movement of the input rod 20. 11 is disposed. That is, the control valve 11 shuts off the working chamber 3 from the atmosphere introduction port 7 and communicates with the negative pressure chamber 2 when the input rod 20 moves backward, and connects the working chamber 3 and the negative pressure chamber when the input rod 20 moves forward. 2 and a known structure that can communicate with the air inlet 7. Between the input rod 20 and the valve cylinder 10, an input return spring 13 that biases the input rod 20 in the backward direction is contracted.

制御弁１１は，弁筒１０に摺動自在に嵌合されて入力杆２０の前端部に連接される弁ピストン１８を備えており，この弁ピストン１８の前端には反力ピストン１７が形成される。   The control valve 11 includes a valve piston 18 slidably fitted to the valve cylinder 10 and connected to the front end portion of the input rod 20. A reaction force piston 17 is formed at the front end of the valve piston 18. The

弁筒１０には，前記軸受筒１２の前端部に当接して弁筒１０及び入力杆２０の後退限を規定するキー部材２３が取り付けられる。   A key member 23 is attached to the valve cylinder 10 so as to abut the front end portion of the bearing cylinder 12 and define the backward limit of the valve cylinder 10 and the input rod 20.

また弁筒１０には，前方に突出する作動ピストン１５と，この作動ピストン１５の中心部を貫通する小径シリンダ孔１６とが設けられ，この小径シリンダ孔１６に前記反力ピストン１７が摺動自在に嵌合される。作動ピストン１５の外周にはカップ体２１が摺動自在に嵌合され，このカップ体２１には作動ピストン１５及び反力ピストン１７に対向する偏平な弾性ピストン２２が充填される。   The valve cylinder 10 is provided with an operating piston 15 that protrudes forward and a small-diameter cylinder hole 16 that penetrates the center of the operating piston 15, and the reaction-force piston 17 is slidable in the small-diameter cylinder hole 16. Fitted. A cup body 21 is slidably fitted on the outer periphery of the working piston 15, and the cup body 21 is filled with a flat elastic piston 22 that faces the working piston 15 and the reaction force piston 17.

カップ体２１の前面には出力杆２５が連設される。したがって，出力杆２５は，カップ体２１を介して弁筒１０に摺動可能に支持されることになる。この出力杆２５は，前記マスタシリンダＭの，前部シェル半体１ａの中心部を貫通するマスタピストンＭｂの後端部に連接される。   An output rod 25 is connected to the front surface of the cup body 21. Therefore, the output rod 25 is slidably supported by the valve cylinder 10 via the cup body 21. This output rod 25 is connected to the rear end portion of the master piston Mb of the master cylinder M passing through the center portion of the front shell half 1a.

以上において，作動ピストン１５，反力ピストン１７，弾性ピストン２２及びカップ体２１は，出力杆２５の出力の一部を入力杆２０にフィードバックする反力機構２４を構成する。   In the above, the operation piston 15, the reaction force piston 17, the elastic piston 22, and the cup body 21 constitute a reaction force mechanism 24 that feeds back a part of the output of the output rod 25 to the input rod 20.

ブースタシェル１の前壁と弁筒１０の前端面との間には，弁筒１０を後退方向へ付勢するブースタ戻しばね２７が縮設される。   Between the front wall of the booster shell 1 and the front end surface of the valve cylinder 10, a booster return spring 27 that urges the valve cylinder 10 in the backward direction is contracted.

さて，タイロッド６による前部シェル半体１ａ，後部シェル半体１ｂ及びマスタシリンダＭの連結構造について，図１及び図２を参照しながら説明する。   Now, a connection structure of the front shell half 1a, the rear shell half 1b and the master cylinder M by the tie rod 6 will be described with reference to FIGS.

タイロッド６には，その前端に位置する前部ボルト部３０と，後端に位置する後部ボルト部３１と，前部ボルト部３０の内端に隣接する前部フランジ３２と，後部ボルト部３１の内端に隣接する後部フランジ３３とが一体形成される。その際，前部及び後部フランジ３２，３３間の距離Ｌ１は，互いに連結される前部及び後部シェル半体１ａ，１ｂ間の端壁間の距離Ｌ２に対応するよう，予め設定される。   The tie rod 6 includes a front bolt part 30 located at the front end, a rear bolt part 31 located at the rear end, a front flange 32 adjacent to the inner end of the front bolt part 30, and a rear bolt part 31. A rear flange 33 adjacent to the inner end is integrally formed. At this time, the distance L1 between the front and rear flanges 32 and 33 is set in advance so as to correspond to the distance L2 between the end walls between the front and rear shell halves 1a and 1b connected to each other.

一方，前部シェル半体１ａには，前部ボルト部３０が貫通する前部透孔３４が，また後部シェル半体１ｂには後部ボルト部３１が貫通する後部透孔３５が穿設されており，後部シェル半体１ｂは，後部透孔３５の周縁部で前記後部フランジ３３と気密にかしめ結合される。   On the other hand, the front shell half 1a is provided with a front through hole 34 through which the front bolt part 30 passes, and the rear shell half 1b is provided with a rear through hole 35 through which the rear bolt part 31 passes. The rear shell half 1b is caulkingly coupled to the rear flange 33 at the peripheral edge of the rear through hole 35 in an airtight manner.

また前部シェル半体１ａの前面に重ねられる，マスタシリンダＭの取り付けフランジＭａ１にも前部ボルト部３０が貫通する透孔３６が穿設される。この透孔３６の後縁部には，テーパ面３７が形成され，このテーパ面３７とタイロッド６の外周面とで，タイロッド６を囲繞する環状で断面三角形状のシール溝３８が画成され，このシール溝３８にＯリング３９が装着される。そして，前記取り付けフランジＭａ１の前方に突出する前部ボルト部３０には，ナット４０が螺合緊締される。   Further, a through hole 36 through which the front bolt part 30 passes is also formed in the mounting flange Ma1 of the master cylinder M, which is overlapped with the front surface of the front shell half 1a. A tapered surface 37 is formed at the rear edge of the through hole 36, and an annular, triangular cross-sectional sealing groove 38 surrounding the tie rod 6 is defined by the tapered surface 37 and the outer peripheral surface of the tie rod 6. An O-ring 39 is attached to the seal groove 38. A nut 40 is screwed and fastened to the front bolt part 30 protruding forward of the mounting flange Ma1.

以上において，タイロッド６の前部フランジ３２は，その外径Ｄ１がシール溝３８の外径Ｄ２よりも大となるように形成される。   As described above, the front flange 32 of the tie rod 6 is formed such that the outer diameter D1 thereof is larger than the outer diameter D2 of the seal groove 38.

前部シェル半体１ａへのマスタシリンダＭの取り付け後，後部シェル半体１ｂは，タイロッド６の後部ボルト部３１と，それに螺合緊締されるナット４１とで車体Ｆに締結され，こうして負圧ブースタＢは車体Ｆに取り付けられる。   After the master cylinder M is attached to the front shell half 1a, the rear shell half 1b is fastened to the vehicle body F by the rear bolt portion 31 of the tie rod 6 and the nut 41 that is screwed and tightened thereto, and thus negative pressure is applied. The booster B is attached to the vehicle body F.

次に，この実施形態の作用について説明する。   Next, the operation of this embodiment will be described.

タイロッド６には，前部シェル半体１ａの後面を支承する前部フランジ３２と，後部シェル半体１ｂに気密にかしめ結合される後部フランジ３３とが一体形成されるので，前部及び後部シェル半体１ａ，１ｂよりなるブースタシェル１の組立時，前部及び後部フランジ３２，３３間の距離調整を行う必要がなく，組立性が良好となり，延いてはタイロッド６の前部ボルト部３０及びナット４０によるマスタシリンダＭの取り付けフランジＭａ１の前部シェル半体１ａへの取り付けを容易に行うことができる。   The tie rod 6 is integrally formed with a front flange 32 that supports the rear surface of the front shell half 1a and a rear flange 33 that is airtightly caulked to the rear shell half 1b. When assembling the booster shell 1 composed of the half halves 1a and 1b, it is not necessary to adjust the distance between the front and rear flanges 32 and 33, the assemblability is improved, and as a result, the front bolt portion 30 of the tie rod 6 and The attachment flange Ma1 of the master cylinder M by the nut 40 can be easily attached to the front shell half 1a.

しかも，前部シェル半体１ａとマスタシリンダＭの取り付けフランジＭａ１とは，前部フランジ３２と，タイロッド６の前部ボルト部３０に螺合したナット４０との協働により締結され，同時に，シール溝３８に装着されるＯリング３９は，取り付けフランジＭａ１のテーパ面３７，前部シェル半体１ａの前面及びタイロッド６の外周面の三面に押圧され密着して，前部シェル半体１ａの前部透孔３４を確実にシールし，負圧室２の負圧の前部透孔３４からのリークを防ぐことができる。特に，前記テーパ面３７は，Ｏリング３９を前部シェル半体１ａの前部透孔３４に向かって押圧することになり，前部シェル半体１ａの前部透孔３４に対するシール効果を効果的に高めることができる。   Moreover, the front shell half 1a and the mounting flange Ma1 of the master cylinder M are fastened by the cooperation of the front flange 32 and the nut 40 screwed to the front bolt part 30 of the tie rod 6, and at the same time, The O-ring 39 mounted in the groove 38 is pressed against and closely contacts the tapered surface 37 of the mounting flange Ma1, the front surface of the front shell half 1a and the outer peripheral surface of the tie rod 6, and the front of the front shell half 1a. The partial through hole 34 can be reliably sealed, and leakage from the front through hole 34 due to the negative pressure in the negative pressure chamber 2 can be prevented. In particular, the tapered surface 37 presses the O-ring 39 toward the front through hole 34 of the front shell half 1a, and the sealing effect on the front through hole 34 of the front shell half 1a is effective. Can be enhanced.

またタイロッド６の前部フランジ３２は，その外径Ｄ１がシール溝３８の外径Ｄ２よりも大となるように形成されるので，シール溝３８の存在に拘らず，前部フランジ３２とマスタシリンダＭの取り付けフランジＭａ１との間で締結軸力が確実に伝達して，前部シェル半体１ａを強固に挟持すると共に，シール溝３８内のＯリング３９にシール圧力を確実に付与することができる。   Further, the front flange 32 of the tie rod 6 is formed so that the outer diameter D1 thereof is larger than the outer diameter D2 of the seal groove 38. Therefore, regardless of the presence of the seal groove 38, the front flange 32 and the master cylinder The fastening axial force can be reliably transmitted to the M mounting flange Ma1, and the front shell half 1a can be firmly clamped, and a seal pressure can be reliably applied to the O-ring 39 in the seal groove 38. it can.

次に，図３に示す本発明の第２実施形態について説明する。   Next, a second embodiment of the present invention shown in FIG. 3 will be described.

この第２実施形態では，前記取り付けフランジＭａ１のシール溝３８に代えて，タイロッド６の前部フランジ３２の前端面に，タイロッド６を囲繞する環状のシール溝１３８が形成され，このシール溝１３８にＯリング１３９が装着される。その他の構成は，前実施形態と同様であるので，図３中，前実施形態と対応する部分には同一の参照符号を付して，重複する説明を省略する。   In the second embodiment, an annular seal groove 138 surrounding the tie rod 6 is formed on the front end surface of the front flange 32 of the tie rod 6 instead of the seal groove 38 of the mounting flange Ma1, and the seal groove 138 An O-ring 139 is attached. Since other configurations are the same as those of the previous embodiment, portions corresponding to those of the previous embodiment in FIG. 3 are denoted by the same reference numerals, and redundant description is omitted.

この第２実施形態によれば，Ｏリング１３９は，シール溝１３８の各内面には勿論，前部シェル半体１ａの後面に密接して前部透孔３４を確実にシールすることができ，その他，前実施形態と同様の効果を達成することができる。   According to the second embodiment, the O-ring 139 can securely seal the front through hole 34 in close contact with the rear surface of the front shell half 1a as well as the inner surfaces of the seal grooves 138. In addition, the same effects as those of the previous embodiment can be achieved.

本発明は，上記実施例に限定されるものではなく，その要旨を逸脱しない範囲で種々の設計変更が可能である。例えば，第１及び第２実施形態のシール溝３８，１３８及びＯリング３９，１３９を併設することもできる。   The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention. For example, the seal grooves 38 and 138 and the O-rings 39 and 139 of the first and second embodiments can be provided side by side.

Ｂ・・・・負圧ブースタ
Ｍ・・・・マスタシリンダ
Ｍａ１・・マスタシリンダの取り付けフランジ
１・・・・ブースタシェル
１ａ・・・前部シェル半体
１ｂ・・・後部シェル半体
５・・・・ダイヤフラム
６・・・・タイロッド
３０・・・前部ボルト部
３２・・・締結受け部（前部フランジ）
３４・・・前部シェル半体の透孔（前部透孔）
３６・・・取り付けフランジの透孔
３８，１３８・・・シール溝
３９，１３９・・・シール部材（Ｏリング）
４０・・・ナット B ... Negative pressure booster M ... Master cylinder Ma1 ... Master cylinder mounting flange 1 ... Booster shell 1a ... Front shell half 1b ... Rear shell half 5 ... .... Diaphragm 6 ... Tie rod 30 ... Front bolt part 32 ... Fastening receiving part (front flange)
34: Front shell half through-hole (front through-hole)
36: Mounting flange through holes 38, 138 ... Seal grooves 39, 139 ... Seal members (O-rings)
40 ... Nut

Claims (3)

椀状の前部シェル半体（１ａ）と，この前部シェル半体（１ａ）の後端部にダイヤフラム（５）を挟んで前端部が対向する椀状の後部シェル半体（１ｂ）と，これら前部及び後部シェル半体（１ａ，１ｂ）を軸方向に貫通しながらそれらを相互に連結するタイロッド（６）とを備えてなり，そのタイロッド（６）には，後部シェル半体（１ｂ）に気密に結合される気密結合部（３３）と，前部シェル半体（１ａ）の後面を支承する締結受け部と，後部シェル半体（１ｂ）及び，その前端面に重ねられるマスタシリンダ（Ｍ）の取り付けフランジ（Ｍａ１）にそれぞれ設けられる透孔（３４，３６）を貫通する前部ボルト部（３０）と設け，前記締結受け部と協働して前部シェル半体（１ａ）及び前記取り付けフランジ（Ｍａ１）間を締結するナット（４０）を前部ボルト部（３０）に螺着した負圧ブースタにおいて，
前記締結受け部として前部フランジ（３２）をタイロッド（６）に一体形成し，この前部フランジ（３２）及び前記取り付けフランジ（Ｍａ１）の少なくとも一方の，前部シェル半体（１ａ）との対向面に，タイロッド（６）を囲繞する環状のシール溝（３８，１３８）を形成し，このシール溝（３８，１３８）に前部シェル半体（１ａ）に密接するシール部材（３９，１３９）を装着したことを特徴とする負圧ブースタ。 A bowl-shaped front shell half (1a), and a bowl-shaped rear shell half (1b) opposite to the front end of the front shell half (1a) with a diaphragm (5) interposed therebetween , And tie rods (6) for connecting the front and rear shell halves (1a, 1b) to each other while passing through in the axial direction. The tie rod (6) includes a rear shell half ( 1b) an airtight coupling portion (33) that is airtightly coupled, a fastening receiving portion for supporting the rear surface of the front shell half (1a), a rear shell half (1b), and a master superimposed on the front end surface thereof A front bolt part (30) that penetrates through holes (34, 36) provided in the mounting flange (Ma1) of the cylinder (M) is provided, and the front shell half (1a) cooperates with the fastening receiving part. ) And the mounting flange (Ma1) In the negative pressure booster Tsu preparative (40) screwed to the front bolt portion (30),
A front flange (32) is integrally formed with the tie rod (6) as the fastening receiving portion, and at least one of the front flange (32) and the mounting flange (Ma1) is connected to the front shell half (1a). An annular seal groove (38, 138) surrounding the tie rod (6) is formed on the opposite surface, and a seal member (39, 139) closely contacting the front shell half (1a) is formed in the seal groove (38, 138). ) Is a negative pressure booster. 請求項１記載の負圧ブースタにおいて，
前記シール溝（３８）を，前記取り付けフランジ（Ｍａ１）の透孔（３６）の後縁部に形成されるテーパ面（３７）とタイロッド（６）の外周面とで断面三角形状に画成し，このシール溝（３８）に前記シール部材としてのＯリング（３９）を装着したことを特徴とする負圧ブースタ。 The negative pressure booster according to claim 1,
The seal groove (38) is defined in a triangular shape by a tapered surface (37) formed at the rear edge of the through hole (36) of the mounting flange (Ma1) and the outer peripheral surface of the tie rod (6). The negative pressure booster is characterized in that an O-ring (39) as the seal member is mounted in the seal groove (38). 請求項１又は２記載の負圧ブースタにおいて，
前記前部フランジ（３２）を，その外径（Ｄ１）が前記シール溝（３８，１３８）の外径（Ｄ２）よりも大となるように形成したことを特徴とする負圧ブースタ。 The negative pressure booster according to claim 1 or 2,
The negative pressure booster, wherein the front flange (32) is formed such that an outer diameter (D1) thereof is larger than an outer diameter (D2) of the seal groove (38, 138).
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JP2021063564A (en) * 2019-10-16 2021-04-22 日本精工株式会社 Hub unit bearing with power generator
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WO2020162399A1 (en) * 2019-02-08 2020-08-13 Ntn株式会社 Vehicle power device and wheel bearing device equipped with generator
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JP7224198B2 (en) 2019-02-08 2023-02-17 Ntn株式会社 Power unit for vehicle and bearing unit for wheel with generator
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JP2021063564A (en) * 2019-10-16 2021-04-22 日本精工株式会社 Hub unit bearing with power generator
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WO2021233693A1 (en) * 2020-05-20 2021-11-25 Robert Bosch Gmbh Housing equipped with a tension anchor, and method for producing a housing equipped with a tension anchor

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