JP2934988B2 - Attachment method of connecting bolt to booster shell for negative pressure booster - Google Patents
Attachment method of connecting bolt to booster shell for negative pressure boosterInfo
- Publication number
- JP2934988B2 JP2934988B2 JP2409511A JP40951190A JP2934988B2 JP 2934988 B2 JP2934988 B2 JP 2934988B2 JP 2409511 A JP2409511 A JP 2409511A JP 40951190 A JP40951190 A JP 40951190A JP 2934988 B2 JP2934988 B2 JP 2934988B2
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- booster
- shell
- screw shaft
- bolt hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Braking Systems And Boosters (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、例えば車両用ブレーキ
に用いられる負圧ブースタのブースタシェルに連結ボル
トを取付ける方法、特に、負圧ブースタの板金製ブース
タシェルに形成されたボルト孔に、そのブースタシェル
の内側からボルト頭を有する連結ボルトのねじ軸を挿通
させて、そのねじ軸のねじ形成部よりも大径で、且つボ
ルト頭に連設されたねじ軸基端部をボルト孔を貫通する
位置に保持し、次いでねじ軸基端部をねじ形成部側の一
端からかしめることにより挟圧フランジを形成して、そ
の挟圧フランジとボルト頭とによりブースタシェルのボ
ルト孔周縁領域を挟圧し、また連結ボルトとブースタシ
ェルとの間にその連結ボルトの回止めを施す方法の改良
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a connecting bolt to a booster shell of a negative pressure booster used for, for example, a vehicle brake, and more particularly, to a bolt hole formed in a sheet metal booster shell of the negative pressure booster. The screw shaft of the connecting bolt having a bolt head is inserted from the inside of the booster shell, and has a larger diameter than the screw forming part of the screw shaft, and penetrates through the bolt hole through the base end of the screw shaft connected to the bolt head. Then, a clamping flange is formed by caulking the base end of the screw shaft from one end of the thread forming portion side, and the clamping flange and the bolt head sandwich the bolt hole peripheral region of the booster shell. The present invention relates to an improvement in a method for compressing and stopping the connection bolt between the connection bolt and the booster shell.
【０００２】[0002]
【従来の技術】従来、この種取付方法として、特開平１
−１５８２０６号公報に開示された方法が知られてい
る。2. Description of the Related Art Conventionally, this kind of mounting method is disclosed in
A method disclosed in Japanese Patent Application No. -158206 is known.
【０００３】この方法におけるボルト孔回りのシール
は、ブースタシェルのボルト孔周縁領域を挟圧フランジ
によりボルト頭の環状凸部に食込ませることによって行
われ、また連結ボルトの回止めは、挟圧フランジに存す
る放射状に配列された複数の回止め凸部をボルト孔周縁
領域に食込ませることによって行われている。In this method, the sealing around the bolt hole is performed by making the peripheral region of the bolt hole of the booster shell bite into the annular convex portion of the bolt head by a clamping flange. This is performed by making a plurality of radially arranged detent projections on the flange bite into the bolt hole peripheral area.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら従来法に
よると、ボルト孔周縁領域およびボルト頭間の面圧が低
く、大きな密着力が得られないため、そのボルト孔回り
を十分気密にシールすることが困難である、という問題
がある。However, according to the conventional method, since the surface pressure between the bolt hole peripheral region and the bolt head is low and a large adhesion force cannot be obtained, it is necessary to sufficiently seal around the bolt hole. There is a problem that it is difficult.
【０００５】また回止め凸部のために、ねじ軸基端部を
セレーション軸状に形成しなければならないが、連結ボ
ルトにおいてボルト頭近傍へのブローチ削り加工は作業
性が悪く加工コストが嵩む、といった問題もある。In order to prevent the rotation, the screw shaft base end must be formed in a serrated shaft shape. However, broaching near the bolt head of the connecting bolt is inferior in workability and increases the processing cost. There is also a problem.
【０００６】本発明は前記に鑑み、ブースタシェルにお
けるボルト孔回りの気密シール性を確保すると共にブロ
ーチ削り加工等の回止め凸部のための加工作業性を良好
にすることのできる前記取付方法を提供することを目的
とする。SUMMARY OF THE INVENTION In view of the above, the present invention provides the above-mentioned mounting method which can secure airtight sealing around a bolt hole in a booster shell and can improve the workability for a detent projection such as broaching. The purpose is to provide.
【０００７】[0007]
【課題を解決するための手段】本発明は、負圧ブースタ
の板金製ブースタシェルに形成されたボルト孔に、その
ブースタシェルの内側からボルト頭を有する連結ボルト
のねじ軸を挿通させて、そのねじ軸のねじ形成部よりも
大径で、且つ前記ボルト頭に連設されたねじ軸基端部を
前記ボルト孔を貫通する位置に保持し、次いで前記ねじ
軸基端部を前記ねじ形成部側の一端からかしめることに
より挟圧フランジを形成して、その挟圧フランジと前記
ボルト頭とにより前記ブースタシェルのボルト孔周縁領
域を挟圧し、また前記連結ボルトとブースタシェルとの
間にその連結ボルトの回止めを施すに当り、前記ボルト
孔周縁領域の内縁部を、前記挟圧フランジの内周部と前
記ボルト頭に在って前記ねじ軸基端部に連なる環状段部
の端面とによって挟圧すると共に前記ボルト孔周縁領域
の外縁部を、前記挟圧フランジの外周部により、前記環
状段部の外周面に添わせることによって、前記内、外縁
部の連設部分を前記端面の外周縁に密着させ、また前記
ボルト頭において前記環状段部の外周に配設された複数
の回止め凸部を前記ボルト孔周縁領域に連なる外周領域
に食込ませることを特徴とする。According to the present invention, a screw shaft of a connecting bolt having a bolt head is inserted from the inside of the booster shell into a bolt hole formed in a sheet metal booster shell of the negative pressure booster. A screw shaft base end having a diameter larger than that of the screw forming portion of the screw shaft and connected to the bolt head is held at a position penetrating the bolt hole, and then the screw shaft base end is fixed to the screw forming portion. A crimping flange is formed by crimping from one end of the side, the crimping flange and the bolt head press the bolt hole peripheral region of the booster shell, and the crimping flange is formed between the connection bolt and the booster shell. In performing the locking of the connecting bolt, the inner edge of the bolt hole peripheral area is formed by the inner peripheral portion of the clamping flange and the end face of the annular step portion at the bolt head and connected to the screw shaft base end. By The outer peripheral portion of the bolt hole peripheral region is applied to the outer peripheral surface of the annular stepped portion by the outer peripheral portion of the clamping flange, so that the continuous portion of the inner and outer edge portions is attached to the outer peripheral edge of the end surface. It is characterized in that a plurality of detent projections arranged on the outer periphery of the annular step portion in the bolt head are cut into an outer peripheral region connected to the bolt hole peripheral region.
【０００８】[0008]
【実施例】図１は、本発明の一実施例を適用したタンデ
ム型負圧ブースタＢを示し、その板金製ブースタシェル
１は、対向端を相互に結合する前後一対の鋼板製前、後
部シェル半体１ａ，１ｂと、両シェル半体１ａ，１ｂ間
に挟止されて両シェル半体１ａ，１ｂ間の室を前部シェ
ル室２と後部シェル室３とに仕切る鋼板製隔壁板１ｃと
から構成される。FIG. 1 shows a tandem-type negative pressure booster B to which an embodiment of the present invention is applied. A booster shell 1 made of a metal plate has a pair of front and rear steel plates which are made of a pair of front and rear steel plates whose opposite ends are mutually connected. A half shell 1a, 1b and a steel plate partition plate 1c sandwiched between the two shell halves 1a, 1b to partition a chamber between the two shell halves 1a, 1b into a front shell chamber 2 and a rear shell chamber 3; Consists of
【０００９】前部シェル室２は、それに前後往復動可能
に収容される前部ブースタピストン４と、その後面に重
合結着されると共に前部シェル半体１ａと隔壁板１ｃと
の間に挟着される前部ダイヤフラム５とにより、前側の
前部負圧室２ａと後側の前部作動室２ｂとに区画され
る。また後部シェル室３は、それに前後往復動可能に収
容される後部ブースタピストン６と、その後面に重合結
着され、且つ隔壁板１ｃと共に両シェル半体１ａ，１ｂ
間に挟着される後部ダイヤフラム７とにより、前側の後
部負圧室３ａと、後側の後部作動室３ｂとに区画され
る。The front shell chamber 2 has a front booster piston 4 housed therein so as to be able to reciprocate back and forth, and is bonded to the rear surface by polymerization and sandwiched between the front shell half 1a and the partition plate 1c. The front diaphragm 5 is divided into a front negative pressure chamber 2a on the front side and a front working chamber 2b on the rear side. The rear shell chamber 3 has a rear booster piston 6 housed therein so as to be able to reciprocate back and forth, and is overlap-bonded to the rear surface thereof, and has both shell halves 1a, 1b together with the partition plate 1c.
The rear diaphragm 7 sandwiched therebetween partitions the front rear negative pressure chamber 3a and the rear rear working chamber 3b on the front side.
【００１０】前、後部ブースタピストン４，６はそれぞ
れ鋼板より環状に成形され、これらは合成樹脂製のピス
トンボス８を介して相互に一体的に連結される。ピスト
ンボス８は、隔壁板１ｃにブシュ９およびシール部材１
０を介して摺動自在に支承される。The front and rear booster pistons 4 and 6 are each formed in a ring shape from a steel plate, and are integrally connected to each other via a piston boss 8 made of synthetic resin. The piston boss 8 includes a bush 9 and a sealing member 1 on the partition plate 1c.
It is slidably supported through the zero.
【００１１】このピストンボス８の後端には弁筒１１が
一体に突設されており、この弁筒１１は、ブースタシェ
ル１の後端に突設された後方延長筒１２にブッシュ１３
およびシール部材１４を介して摺動自在に支承される。At the rear end of the piston boss 8, a valve cylinder 11 is integrally provided. The valve cylinder 11 is provided with a bush 13 at a rear extension cylinder 12 which is provided at the rear end of the booster shell 1.
And slidably supported via a seal member 14.
【００１２】前部負圧室２ａは、負圧導入管１５を介し
て負圧源（例えば内燃機関の吸気マニホールド内部）に
接続される。図には省略したが、ピストンボス８には
前、後部負圧室２ａ，３ａを連通する第１ポートおよび
前、後部作動室２ｂ，３ｂを連通する第２ポートが形成
され、また弁筒１１には前、後部作動室２ｂ，３ｂを、
前、後部負圧室２ａ，３ａと、前記後方延長筒１２の端
壁に開口する大気導入口１６とに交互に連通切換する公
知の制御弁が設けられ、その制御弁は入力杆１７を介し
てブレーキペダル１８により操作される。The front negative pressure chamber 2a is connected to a negative pressure source (for example, the inside of an intake manifold of an internal combustion engine) through a negative pressure introducing pipe 15. Although not shown in the drawing, the piston boss 8 has a first port communicating with the front and rear negative pressure chambers 2a and 3a and a second port communicating with the front and rear working chambers 2b and 3b. Front and rear working chambers 2b and 3b,
A well-known control valve for alternately switching communication between the front and rear negative pressure chambers 2a and 3a and the air inlet 16 opened in the end wall of the rear extension cylinder 12 is provided. And is operated by the brake pedal 18.
【００１３】またピストンボス８には、前方へ突出する
出力杆１９が装着され、前部負圧室２ａにはピストンボ
ス８を後退方向へ付勢する戻しばね２０が縮設される。An output rod 19 projecting forward is mounted on the piston boss 8, and a return spring 20 for urging the piston boss 8 in the backward direction is contracted in the front negative pressure chamber 2a.
【００１４】前部シェル半体１ａには、ブレーキ用マス
タシリンダＭの連結フランジ２１が一対の連結ボルト２
２と、それらに螺合するナット２３とにより固着され、
そのピストン２４の後端に出力杆１９が連接される。A connecting flange 21 of the master cylinder M for braking is connected to the front shell half
2 and a nut 23 screwed to them,
The output rod 19 is connected to the rear end of the piston 24.
【００１５】また後部シェル半体１ｂは、四角形の各頂
点に配置された４本の連結ボルト２５と、それらに螺合
するナット２６とにより車体のダッシュボードＤに固着
される。The rear shell half 1b is fixed to the dashboard D of the vehicle body by four connecting bolts 25 arranged at each apex of the square and nuts 26 screwed to them.
【００１６】而して、ブレーキペダル１８の踏込操作に
より入力杆１７を前進させると、作動室２ｂ，３ｂは、
制御弁により負圧室２ａ，３ａとの連通を絶たれると共
に大気導入口１６と連通されるので、作動室２ｂ，３ｂ
に大気圧が作用し、負圧室２ａ，３ａと作動室２ｂ，３
ｂとの間に生じる大なる気圧差によりブースタピストン
４，６が前進作動し、出力杆１９を介してマスタシリン
ダＭのピストン２４を倍力作動することができる。ま
た、ブレーキペダル１８を解放して入力杆１７を後退さ
せれば、作動室２ｂ，３ｂは、制御弁により大気導入口
１６との連通を絶たれると共に負圧室２ａ，３ａと連通
されるので、作動室２ｂ，３ｂと負圧室２ａ，３ａとの
間の気圧差が減少し、戻しばね２０の力でブースタピス
トン４，６は後退することができる。When the input lever 17 is advanced by depressing the brake pedal 18, the operating chambers 2b and 3b
Since the communication with the negative pressure chambers 2a and 3a is cut off by the control valve and the communication with the air introduction port 16 is established, the working chambers 2b and 3b
Is applied to the negative pressure chambers 2a, 3a and the working chambers 2b, 3
The booster pistons 4 and 6 are operated forward by the large pressure difference generated between the booster piston b and the booster piston 24 of the master cylinder M via the output rod 19. Further, when the brake pedal 18 is released and the input rod 17 is retracted, the working chambers 2b and 3b are disconnected from the atmosphere introduction port 16 by the control valve and are communicated with the negative pressure chambers 2a and 3a. The pressure difference between the working chambers 2b, 3b and the negative pressure chambers 2a, 3a is reduced, and the booster pistons 4, 6 can be retracted by the force of the return spring 20.
【００１７】次に、ブースタシェル１に対する各連結ボ
ルト２２，２５の取付方法について説明する。各連結ボ
ルト２２，２５の構成およびその取付方法は両シェル半
体１ａ，１ｂについて略同じであるから後部シェル半体
１ｂについて述べ、前部シェル半体１ａについては省略
する。Next, a method of attaching the connecting bolts 22 and 25 to the booster shell 1 will be described. Since the configuration of the connecting bolts 22 and 25 and the mounting method thereof are substantially the same for both shell halves 1a and 1b, the rear shell half 1b will be described, and the front shell half 1a will be omitted.
【００１８】連結ボルト２５は、図２，図３に明示する
ようにねじ軸２７と、その一端に連設されたボルト頭２
８とを備えている。ねじ軸２７はねじ形成部２９と、そ
れよりも大径で、且つボルト頭２８に連設されたねじ軸
基端部３０とを有する。またボルト頭２８はねじ軸基端
部３０に連なる環状段部３１と、その環状段部３１を囲
繞する環状溝３２とを有する。環状段部３１はボルト頭
２８の環状端面３３よりも若干落込んだ位置にある。ね
じ軸基端部３０の外径ａ1 は、後部シェル半体１ｂにお
けるボルト孔３４の内径ａ2 よりも若干大きく形成され
ている。As shown in FIGS. 2 and 3, the connecting bolt 25 has a screw shaft 27 and a bolt head 2 connected to one end thereof.
8 is provided. The screw shaft 27 has a screw forming portion 29 and a screw shaft base end 30 having a diameter larger than that and connected to the bolt head 28. In addition, the bolt head 28 has an annular step 31 connected to the screw shaft base end 30, and an annular groove 32 surrounding the annular step 31. The annular step portion 31 is located at a position slightly lower than the annular end surface 33 of the bolt head 28. Outer diameter a 1 of the screw shaft proximal portion 30 is slightly larger than the inner diameter a 2 of the bolt holes 34 in the rear half shell 1b.
【００１９】ボルト頭２８において、環状端面３３の内
周縁より環状溝３２内周面母線方向に延びるように断面
山形をなす複数の回止め凸部３５が放射状に配設され、
各回止め凸部３５の環状端面３３側は、その面３３より
も突出している。これら回止め凸部３５により環状溝３
２の内周面はセレーションを持つことになるが、ボルト
頭２８に各回止め凸部３５をブローチ削り加工により形
成することは容易である。On the bolt head 28, a plurality of detent projections 35 having a mountain shape in cross section are radially disposed so as to extend from the inner peripheral edge of the annular end face 33 in the direction of the generatrix of the inner peripheral surface of the annular groove 32.
The annular end face 33 side of each detent projection 35 projects beyond that face 33. The annular groove 3 is formed by these detent projections 35
The inner peripheral surface of the bolt 2 has serrations, but it is easy to form the respective stopper projections 35 on the bolt head 28 by broaching.
【００２０】取付作業に当っては、図４に示すように、
後部シェル半体１ｂにボルト孔３４を形成すると共にそ
のボルト孔周縁領域Ｒ1 を後部シェル半体１ｂの外面側
が凹となるように成形する。そしてボルト孔３４に、そ
の半体１ｂの内側から連結ボルト２５のねじ形成部２９
を挿通させ、引続きねじ軸基端部３０を圧入し、そのね
じ軸基端部３０をそれがボルト孔３４を貫通する位置に
保持し、また後部シェル半体１ｂを各回止め凸部３５に
当接する。In the mounting operation, as shown in FIG.
The bolt holes peripheral regions R 1 to form the bolt holes 34 in the rear half shell 1b outer surface of the rear shell half 1b is formed so that the concave. Then, the screw forming portion 29 of the connecting bolt 25 is inserted into the bolt hole 34 from the inside of the half 1b.
Then, the screw shaft base end 30 is press-fitted, the screw shaft base end 30 is held at a position where the screw shaft base end 30 passes through the bolt hole 34, and the rear shell half 1 b is brought into contact with each of the rotation stopping protrusions 35. Touch
【００２１】次いで、図５に示すように、中間部に環状
突起３６を有する押圧面３７を備えたポンチ３８を用
い、その押圧面３７の内周部３９によりねじ軸基端部３
０をねじ形成部２９側の一端からかしめることにより挟
圧フランジ４０を形成し、その挟圧フランジ４０の内周
部ｂ1 と環状段部３１の端面４１とによってボルト孔周
縁領域Ｒ1 の内縁部ｃ1 を挟圧する。また挟圧フランジ
４０の外周部ｂ2 を押圧面３７の内周部３９と環状突起
３６との協働により折曲げて、その外周部ｂ2 によりボ
ルト孔周縁領域Ｒ1 の外縁部ｃ2 を環状段部３１の外周
面に添わせることによって、内、外縁部ｃ1 ，ｃ2 の連
設部分ｄを環状段部３５における端面４１の外周縁ｅに
高面圧を以て密着させ、この密着によってボルト孔３４
回りの気密シール性を確保する。Next, as shown in FIG. 5, a punch 38 having a pressing surface 37 having an annular projection 36 at an intermediate portion is used, and an inner peripheral portion 39 of the pressing surface 37 is used to form the screw shaft base end 3.
0 is crimped from one end of the screw forming portion 29 side to form the clamping flange 40, and the inner peripheral portion b 1 of the clamping flange 40 and the end face 41 of the annular step portion 31 define the bolt hole peripheral region R 1 . nipping the inner edge c 1. Further by bending the inner peripheral portion 39 and the annular projection 36 in cooperation with the pressing surface 37 a peripheral portion b 2 of the clamping flange 40, the outer peripheral portion thereof b 2 an outer edge c 2 of the bolt hole peripheral region R 1 By being attached to the outer peripheral surface of the annular step portion 31, the continuous portion d of the inner and outer edge portions c 1 and c 2 is brought into close contact with the outer peripheral edge e of the end surface 41 of the annular step portion 35 with a high surface pressure. Bolt hole 34
Ensuring the hermetic sealing around.
【００２２】また後部シェル半体１ｂにおいて、ピン孔
周縁領域Ｒ1 に連なる外周領域Ｒ2 を押圧面３７の環状
突起３６および外周部４２の協働によって押圧し、その
外周領域Ｒ2 に各回止め凸部３５を食込ませると共に外
周領域Ｒ2 を各回止め凸部３５を変形させてボルト頭２
８の環状端面３３に圧着する。これにより連結ボルト２
５の回止めがなされる。[0022] In the rear shell half 1b, it presses the outer peripheral region R 2 continuous to the pin hole peripheral region R 1 by cooperation of the annular projection 36 and the outer peripheral portion 42 of the pressing surface 37, each time fastened to the outer peripheral region R 2 causes bite into the projections 35 with the outer peripheral region R 2 is deformed each time stopper projections 35 bolt head 2
8 is pressed against the annular end face 33. Thereby, the connecting bolt 2
Five stops are made.
【００２３】図６，図７は本発明の他の実施例を示す。
図６に示すように、連結ボルト２５のボルト頭２８にお
いて、その外周部に環状段部３１の外周面と対向するよ
うに前記同様の複数の回止め凸部３５が放射状に配設さ
れる。このように配設される回止め凸部３５をブローチ
削り加工により形成することは容易である。連結ボルト
２５のその外の構成は前記実施例のものと同じである。 FIGS. 6 and 7 show another embodiment of the present invention.
As shown in FIG. 6 , in the bolt head 28 of the connecting bolt 25, a plurality of detent protrusions 35 similar to the above are radially arranged on the outer peripheral portion thereof so as to face the outer peripheral surface of the annular step portion 31. It is easy to form the detent projection 35 provided by broaching. The other configuration of the connection bolt 25 is the same as that of the above-described embodiment.
【００２４】また後部シェル半体１ｂはシェル部４３
と、その内面に溶接された補強板４４とよりなり、その
補強板４４はシェル部４３におけるボルト孔周縁領域Ｒ
1 の変形を許容し得るように貫通孔４５を有する。The rear shell half 1b has a shell portion 43.
And a reinforcing plate 44 welded to the inner surface thereof.
A through hole 45 is provided so as to allow one deformation.
【００２５】図７に示すように、ボルト孔周縁領域Ｒ1
は前記実施例と同様に挟圧フランジ４０により変形され
てボルト孔３４回りの気密シール性が確保され、また外
周領域Ｒ2 において補強板４４に各回止め凸部３５を食
込ませて連結ボルト２５の回止めがなされる。As shown in FIG . 7 , the bolt hole peripheral region R 1
Example similarly hermetically sealing of bolt holes 34 around is deformed by clamping flange 40 is ensured, also linked by bite each time retaining projections 35 in the reinforcing plate 44 in the outer peripheral region R 2 volts 25 Is stopped.
【００２６】[0026]
【発明の効果】本発明によれば、ブースタシェルのボル
ト孔周縁領域における内、外縁部の連設部分を、連結ボ
ルトにおける環状段部端面の外周縁に高面圧を以て密着
させることができ、これによりブースタシェルのボルト
回りにおける気密シール性を十分に確保することができ
る。According to the present invention, the continuous portion of the inner and outer edges in the bolt hole peripheral region of the booster shell can be brought into close contact with the outer peripheral edge of the annular step end surface of the connecting bolt with a high surface pressure, Thereby, the hermetic sealing property around the bolt of the booster shell can be sufficiently ensured.
【００２７】またボルト頭に各回止め凸部を配設するの
で、それら回止め凸部の形成が容易であり、これにより
加工コストを低減することができる。Further, since each locking protrusion is provided on the bolt head, it is easy to form the locking protrusion, thereby reducing the processing cost.
【図１】本発明の一実施例を適用したタンデム型負圧ブ
ースタの縦断正面図である。FIG. 1 is a vertical sectional front view of a tandem type negative pressure booster to which an embodiment of the present invention is applied.
【図２】連結ボルトの要部破断正面図である。FIG. 2 is a fragmentary front view of a connection bolt.
【図３】図２の３−３線断面図である。FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;
【図４】本発明の一実施例において、連結ボルトをブー
スタシェルに保持させた状態を示す要部縦断正面図であ
る。FIG. 4 is a vertical sectional front view showing a state where a connecting bolt is held by a booster shell in one embodiment of the present invention.
【図５】連結ボルトをブースタシェルに取付けた状態を
示す要部縦断正面図である。FIG. 5 is a vertical sectional front view of an essential part showing a state where a connecting bolt is attached to a booster shell.
【図６】本発明の他の実施例において、連結ボルトをブ
ースタシェルに保持させた状態を示す要部縦断正面図で
ある。FIG. 6 is a vertical sectional front view showing a state where a connecting bolt is held by a booster shell in another embodiment of the present invention.
【図７】連結ボルトをブースタシェルに取付けた状態を
示す要部縦断正面図である。FIG. 7 is a longitudinal sectional front view of a main part showing a state in which a connecting bolt is attached to a booster shell.
Ｂ 負圧ブースタ Ｒ1 ボルト孔周縁領域 Ｒ2 外周領域 ｂ1 ，ｂ2 内、外周部 ｃ1 ，ｃ2 内、外縁部 ｄ 連設部分 ｅ 外周縁 １ ブースタシェル ２２，２５ 連結ボルト ２７ ねじ軸 ２８ ボルト頭 ２９ ねじ形成部 ３０ ねじ軸基端部 ３１ 環状段部 ３４ ボルト孔 ３５ 回止め凸部 ４０ 挟圧フランジ ４１ 端面B Negative pressure booster R 1 Bolt hole peripheral area R 2 outer peripheral area b 1 , b 2 , outer peripheral part c 1 , c 2 , outer peripheral part d continuous part e outer peripheral edge 1 booster shell 22, 25 connecting bolt 27 screw shaft 28 Bolt Head 29 Thread Forming Part 30 Screw Shaft Base End 31 Annular Step 34 Bolt Hole 35 Detenting Protrusion 40 Clamping Flange 41 End Face
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F16B 35/04 F16B 35/00 B60T 13/52 - 13/577 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) F16B 35/04 F16B 35/00 B60T 13/52-13/577
Claims (1)
ル（１）に形成されたボルト孔（３４）に、そのブース
タシェル（１）の内側からボルト頭（２８）を有する連
結ボルト（２２，２５）のねじ軸（２７）を挿通させ
て、そのねじ軸（２７）のねじ形成部（２９）よりも大
径で、且つ前記ボルト頭（２８）に連設されたねじ軸基
端部（３０）を前記ボルト孔（３４）を貫通する位置に
保持し、次いで前記ねじ軸基端部（３０）を前記ねじ形
成部（２９）側の一端からかしめることにより挟圧フラ
ンジ（４０）を形成して、その挟圧フランジ（４０）と
前記ボルト頭（２８）とにより前記ブースタシェル
（１）のボルト孔周縁領域（Ｒ1 ）を挟圧し、また前記
連結ボルト（２２，２５）とブースタシェル（１）との
間にその連結ボルト（２２，２５）の回止めを施すに当
り、前記ボルト孔周縁領域（Ｒ1 ）の内縁部（ｃ1 ）
を、前記挟圧フランジ（４０）の内周部（ｂ1 ）と前記
ボルト頭（２８）に在って前記ねじ軸基端部（３０）に
連なる環状段部（３１）の端面（４１）とによって挟圧
すると共に前記ボルト孔周縁領域（Ｒ1 ）の外縁部（ｃ
2 ）を、前記挟圧フランジ（４０）の外周部（ｂ2 ）に
より、前記環状段部（３１）の外周面に添わせることに
よって、前記内、外縁部（ｃ1 ，ｃ2 ）の連設部分
（ｄ）を前記端面（４１）の外周縁（ｅ）に密着させ、
また前記ボルト頭（２８）において前記環状段部（３
１）の外周に配設された複数の回止め凸部（３５）を前
記ボルト孔周縁領域（Ｒ1 ）に連なる外周領域（Ｒ2 ）
に食込ませることを特徴とする、負圧ブースタ用ブース
タシェルに対する連結ボルトの取付方法。A connecting bolt (22) having a bolt head (28) from inside the booster shell (1) in a bolt hole (34) formed in a sheet metal booster shell (1) of the negative pressure booster (B). , 25) through which the screw shaft (27) is inserted, the diameter of which is larger than the thread forming portion (29) of the screw shaft (27), and the base end of the screw shaft (28) connected to the bolt head (28). (30) is held at a position penetrating the bolt hole (34), and then the screw shaft base end (30) is swaged from one end on the screw forming portion (29) side to thereby press the flange (40). Is formed, and the clamping flange (40) and the bolt head (28) clamp the bolt hole peripheral region (R 1 ) of the booster shell (1). Between the booster shell (1) and the connecting bolt (2) Hits the subjected to anti-rotation 25), the inner edge of the bolt hole edge region (R 1) (c 1)
The end face (41) of an annular step (31) which is located on the inner peripheral part (b 1 ) of the clamping flange (40) and the bolt head (28) and is continuous with the screw shaft base end (30). And the outer edge (c) of the bolt hole peripheral region (R 1 ).
2 ) is attached to the outer peripheral surface of the annular step portion (31) by the outer peripheral portion (b 2 ) of the clamping flange (40), thereby connecting the inner and outer edge portions (c 1 , c 2 ). The set part (d) is brought into close contact with the outer peripheral edge (e) of the end face (41),
Also, at the bolt head (28), the annular step (3)
An outer peripheral region (R 2 ) that connects the plurality of rotation preventing protrusions (35) arranged on the outer periphery of 1) to the bolt hole peripheral region (R 1 ).
A method of attaching a connecting bolt to a booster shell for a negative pressure booster, characterized in that the connecting bolt is inserted into the booster shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2409511A JP2934988B2 (en) | 1990-12-28 | 1990-12-28 | Attachment method of connecting bolt to booster shell for negative pressure booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2409511A JP2934988B2 (en) | 1990-12-28 | 1990-12-28 | Attachment method of connecting bolt to booster shell for negative pressure booster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04249609A JPH04249609A (en) | 1992-09-04 |
| JP2934988B2 true JP2934988B2 (en) | 1999-08-16 |
Family
ID=18518841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2409511A Expired - Fee Related JP2934988B2 (en) | 1990-12-28 | 1990-12-28 | Attachment method of connecting bolt to booster shell for negative pressure booster |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2934988B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5148074B2 (en) * | 2006-05-24 | 2013-02-20 | プロフィル・フェルビンドゥングステヒニック・ゲーエムベーハー・ウント・コンパニー・カーゲー | Member and part assembly that can be attached to sheet metal part by riveting, and method for manufacturing the part assembly |
-
1990
- 1990-12-28 JP JP2409511A patent/JP2934988B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04249609A (en) | 1992-09-04 |
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