JPH08159132A - Method of caulking plate and bolt - Google Patents
Method of caulking plate and boltInfo
- Publication number
- JPH08159132A JPH08159132A JP6303931A JP30393194A JPH08159132A JP H08159132 A JPH08159132 A JP H08159132A JP 6303931 A JP6303931 A JP 6303931A JP 30393194 A JP30393194 A JP 30393194A JP H08159132 A JPH08159132 A JP H08159132A
- Authority
- JP
- Japan
- Prior art keywords
- caulking
- shaft portion
- plate
- deformation
- bolt
- 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.)
- Granted
Links
Landscapes
- Braking Systems And Boosters (AREA)
Abstract
(57)【要約】
【目的】プレートと、ねじ軸部の基端が変形軸部を介し
て頭部に連設されて成るとともに頭部には変形軸部を囲
繞する環状溝が設けられるボルトとのかしめ結合にあた
って、ねじ軸部を挿入させる孔を備えるかしめ具で変形
軸部の外周部全周を頭部側にかしめることにより、変形
軸部で生じた塑性変形部でプレートを頭部側に挟圧して
環状溝に食い込ませるようにしたプレート及びボルトの
かしめ結合方法において、プレートの板厚変化にかかわ
らず単一種類のボルトにより優れた耐久性を発揮するか
しめ結合構造を得る。
【構成】孔４２の内径を異ならせた複数のかしめ具４３
を予め準備しておき、プレート６の板厚が増大するのに
応じて孔４２の内径が小さなかしめ具４３を選択してか
しめ加工を施す。
(57) [Abstract] [Purpose] A bolt having a plate and a base end of a screw shaft connected to a head through a deformation shaft, and an annular groove surrounding the deformation shaft provided on the head. When caulking with, the plate is headed by the plastically deformed portion generated by the deformed shaft portion by caulking the entire outer circumference of the deformed shaft portion with a caulking tool that has a hole for inserting the screw shaft portion. In a caulking method of caulking a plate and a bolt so as to squeeze into an annular groove by pinching to the side, a caulking coupling structure exhibiting excellent durability is obtained by a single type of bolt regardless of the plate thickness change of the plate. [Structure] A plurality of caulking tools 43 having different inner diameters of holes 42
Is prepared in advance, and a caulking tool 43 having an inner diameter of the hole 42 is selected in accordance with an increase in the plate thickness of the plate 6, and caulking is performed.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、貫通孔を有するプレー
トと、ねじ軸部の基端が少なくとも塑性変形前にはねじ
軸部よりも大径である変形軸部を介して頭部に連設され
て成るとともに頭部には変形軸部を囲繞する環状溝が設
けられるボルトとのかしめ結合にあたって、プレートの
貫通孔に変形軸部およびねじ軸部を挿通させた状態で変
形軸部の外周部全周を、該変形軸部の塑性変形前の外径
よりも小径であってねじ軸部の外径よりも大径である内
径の孔を有するかしめ具で頭部側にかしめることによ
り、変形軸部で生じた塑性変形部でプレートを頭部側に
挟圧して環状溝に食い込ませるようにしたプレート及び
ボルトのかしめ結合方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is connected to a head through a plate having a through hole and a deformation shaft portion whose base end has a diameter larger than that of the screw shaft portion at least before plastic deformation. An annular groove surrounding the deformation shaft is provided on the head, and the outer periphery of the deformation shaft with the deformation shaft and the screw shaft inserted through the through holes of the plate for caulking with the bolt. By caulking the entire circumference of the part to the head side with a caulking tool having a hole having an inner diameter that is smaller than the outer diameter of the deformation shaft portion before plastic deformation and larger than the outer diameter of the screw shaft portion. The present invention relates to a method for caulking and joining a plate and a bolt, in which a plate is pinched by a plastic deformation portion generated in a deformation shaft portion toward the head side so as to be bitten into an annular groove.
【０００２】[0002]
【従来の技術】従来、かかるかしめ結合方法は、特開平
１−１５８２０６号公報等により既に知られている。2. Description of the Related Art Conventionally, such a caulking coupling method is already known from Japanese Patent Application Laid-Open No. 1-158206.
【０００３】[0003]
【発明が解決しようとする課題】かかるかしめ結合で
は、ねじ軸部を挿通させる孔を有するかしめ具で変形軸
部の外周部を頭部側にかしめて塑性変形させ、その塑性
変形部によりプレートを環状溝に食い込むように塑性変
形させている。ところが、プレートの板厚が寸法公差等
により変化するものであり、プレートの板厚変化にかか
わらず、同一種類のボルトおよび同一のかしめ具による
かしめを実行すると、かしめ具による変形軸部のかしめ
長さが変化することに伴う変形軸部のかしめ変形肉量の
変化により、変形軸部で生じた塑性変形部がプレートの
表面から隆起したり、前記塑性変形部がプレートの表面
から陥没したりして、プレートの表面と面一にすること
ができず、かしめ部の耐久性に問題が生じることがあ
る。しかるに、プレートの板厚変化に応じて異なるボル
トを用意していたのでは、用意しておくボルトの種類が
多くなり、コストの増大を招く。In such caulking connection, a caulking tool having a hole for inserting a screw shaft portion is used to caulk the outer peripheral portion of the deforming shaft portion to the head side for plastic deformation, and the plastic deforming portion forms a plate. It is plastically deformed so as to bite into the annular groove. However, the plate thickness of the plate changes due to dimensional tolerances, etc., and if the same type of bolt and the same caulking tool are used for caulking regardless of the plate thickness change, the caulking length of the deformed shaft part Due to the change in the caulking deformation thickness of the deformation shaft due to the change in the deformation, the plastic deformation part generated in the deformation shaft may rise from the surface of the plate, or the plastic deformation part may sink from the surface of the plate. Therefore, the plate cannot be flush with the surface of the plate, which may cause a problem in durability of the caulked portion. However, if different bolts are prepared depending on the plate thickness change of the plate, the number of types of bolts to be prepared increases and the cost increases.
【０００４】本発明は、かかる事情に鑑みてなされたも
のであり、プレートの板厚変化にかかわらず単一種類の
ボルトにより優れた耐久性を発揮するかしめ結合構造が
得られるようにしたプレート及びボルトのかしめ結合方
法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 plate and a caulking joint structure which exhibit excellent durability by a single type of bolt regardless of a change in plate thickness are provided. It is an object of the present invention to provide a caulking connection method for bolts.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、貫通孔を有するプレートと、ねじ軸部の
基端が少なくとも塑性変形前にはねじ軸部よりも大径で
ある変形軸部を介して頭部に連設されて成るとともに頭
部には変形軸部を囲繞する環状溝が設けられるボルトと
のかしめ結合にあたって、プレートの貫通孔に変形軸部
およびねじ軸部を挿通させた状態で変形軸部の外周部全
周を、該変形軸部の塑性変形前の外径よりも小径であっ
てねじ軸部の外径よりも大径である内径の孔を有するか
しめ具で頭部側にかしめることにより、変形軸部で生じ
た塑性変形部でプレートを頭部側に挟圧して環状溝に食
い込ませるようにしたプレート及びボルトのかしめ結合
方法において、孔の内径を異ならせた複数のかしめ具を
予め準備しておき、プレートの板厚が増大するのに応じ
て孔の内径が小さなかしめ具を選択してかしめ加工を施
すことを特徴とする。In order to achieve the above object, according to the present invention, a plate having a through hole and a base end of a screw shaft portion have a diameter larger than that of the screw shaft portion at least before plastic deformation. It is connected to the head through the deforming shaft and the head has an annular groove surrounding the deforming shaft.When caulking with a bolt, the deforming shaft and the screw shaft are inserted into the through holes of the plate. In the inserted state, the entire outer peripheral portion of the deformation shaft portion has a hole having an inner diameter smaller than the outer diameter of the deformation shaft portion before plastic deformation and larger than the outer diameter of the screw shaft portion. The inner diameter of the hole in the plate and bolt caulking connection method in which the plate is pinched to the head side by the plastic deformation part generated in the deformation shaft part so as to bite into the annular groove by caulking with the tool to the head side. Prepare a plurality of crimping tools with different And characterized by applying caulking inner diameter of the bore in response to the thickness of the plate is increased by selecting a smaller caulking tool.
【０００６】[0006]
【作用】上述のように、プレートの板厚が増大するのに
応じて小さな内径の孔を有するかしめ具を選択すること
により、プレートの板厚増大に伴う変形軸部のかしめ長
さ短縮に応じて、変形軸部のかしめ変形部分の半径方向
に沿う厚さを大とするようにして、変形軸部で生じる塑
性変形部の容積を調整することにより、プレートを環状
溝に食い込ませた状態での塑性変形部の表面をプレート
の表面と略面一にすることが可能となる。As described above, by selecting a caulking tool having a hole with a small inner diameter as the plate thickness of the plate increases, the caulking length of the deformable shaft portion can be shortened as the plate thickness of the plate increases. By adjusting the volume of the plastic deformation portion generated in the deformation shaft portion by increasing the thickness of the deformation shaft portion along the radial direction of the caulking deformation portion, and making the plate bite into the annular groove. It is possible to make the surface of the plastically deformed portion of the plate substantially flush with the surface of the plate.
【０００７】[0007]
【実施例】以下、図面により本発明を負圧ブースタに適
用したときの実施例について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the present invention is applied to a negative pressure booster will be described below with reference to the drawings.
【０００８】図１ないし図６は本発明の一実施例を示す
ものであり、図１は負圧ブースタの縦断面図、図２は図
１の２矢視部拡大図、図３は図２の構造のかしめ結合前
の状態を示す断面図、図４はかしめ具によるかしめ結合
終了時の図３に対応する断面図、図５は図１の５矢視部
拡大図、図６はプレート板厚を変化させた状態での図４
に対応する断面図である。FIGS. 1 to 6 show an embodiment of the present invention. FIG. 1 is a vertical cross-sectional view of a negative pressure booster, FIG. 2 is an enlarged view of an arrow 2 in FIG. 1, and FIG. 4 is a sectional view showing a state before caulking and coupling, FIG. 4 is a sectional view corresponding to FIG. 3 at the end of caulking coupling by a caulking tool, FIG. 5 is an enlarged view of a portion indicated by an arrow 5 in FIG. Figure 4 with varying thickness
It is sectional drawing corresponding to.
【０００９】先ず図１において、図示しない車輪ブレー
キを作動せしめる制動液圧を発生するマスタシリンダＭ
と、ブレーキペダルＰとの間には、ブレーキペダルＰの
踏力を倍力してマスタシリンダＭに伝達する負圧ブース
タＢが設けられる。First, in FIG. 1, a master cylinder M for generating a braking hydraulic pressure for operating a wheel brake (not shown).
And a brake pedal P, a negative pressure booster B that boosts the pedaling force of the brake pedal P and transmits the boosted force to the master cylinder M is provided.
【００１０】負圧ブースタＢのシェル５は、前方に向け
て開口した椀状の後部シェル半体６ならびに後方に向け
て開口した椀状の前部シェル半体７の対向端が相互に結
合されて成るものであり、このシェル５内には、ブース
タピストン８が前後往復動自在に収容される。ブースタ
ピストン８の後面にはダイヤフラム９が重合され、該ダ
イヤフラム９の外周ビード９ａは、両シェル半体６，７
の衝合部に形成された溝１０に結着され、ダイヤフラム
９の内周ビード９ｂは、ブースタピストン８の内周とと
もにピストンボス１１の前部外周に結合される。而して
シェル５内は、ブースタピストン８およびダイヤフラム
９によって、ブースタピストン８の前面を臨ませる前方
側の負圧室１２と、ダイヤフラム９の後面を臨ませる作
動室１３とに区画される。In the shell 5 of the negative pressure booster B, the opposite ends of a bowl-shaped rear shell half body 6 that is open to the front and a bowl-shaped front shell half body 7 that is open to the rear are connected to each other. The booster piston 8 is housed in the shell 5 so as to be movable back and forth. A diaphragm 9 is superposed on the rear surface of the booster piston 8, and an outer peripheral bead 9a of the diaphragm 9 is formed on both shell halves 6 and 7.
The inner peripheral bead 9b of the diaphragm 9 is bonded to the groove 10 formed in the abutting portion of the piston 9, and is connected to the inner periphery of the booster piston 8 and the outer periphery of the front portion of the piston boss 11. Thus, the inside of the shell 5 is partitioned by the booster piston 8 and the diaphragm 9 into a front negative pressure chamber 12 that faces the front surface of the booster piston 8 and an operation chamber 13 that faces the rear surface of the diaphragm 9.
【００１１】シェル５の後壁すなわち後部シェル半体６
の中央部には、ピストンボス１１を前後摺動自在に支承
する後方延長筒１４が一体に設けられる。またシェル５
の前壁すなわち前部シェル半体７には接続筒１５が連設
されており、負圧室１２は、該接続筒１５を介して負圧
源たとえば内燃機関の吸気通路に連通される。Rear wall or rear shell half 6 of shell 5
A rear extension cylinder 14 that supports the piston boss 11 slidably in the front and rear direction is integrally provided in the central portion of the. Again shell 5
The front wall, that is, the front shell half body 7, is provided with a connecting cylinder 15 in series, and the negative pressure chamber 12 is connected to the negative pressure source, for example, an intake passage of an internal combustion engine, through the connecting cylinder 15.
【００１２】ブレーキペダルＰに連結されて前後動する
入力杆１６の先端部には球状部が設けられており、この
球状部がピストンボス１１の中心部に嵌合した弁ピスト
ン１７の後端に首振り可能に枢着される。また入力杆１
６には、ロックナット１９によって位置を調整可能とし
たストッパ支持部材１８が固定されており、後方延長筒
１４の後端に当接して入力杆１６の後退限を定める環状
のストッパ２０がストッパ支持部材１８に支持される。
さらにピストンボス１１およびストッパ支持部材１８間
には、後方延長筒１４の後端に開口した大気導入口２１
からの導入空気を浄化すべくフィルタ２２，２２が装着
される。A spherical portion is provided at the tip of the input rod 16 which is connected to the brake pedal P and moves back and forth. The spherical portion is provided at the rear end of the valve piston 17 fitted in the center of the piston boss 11. It is pivotally attached so that it can be swung. Also input rod 1
A stopper support member 18 whose position can be adjusted by a lock nut 19 is fixed to the stopper 6, and an annular stopper 20 that abuts on the rear end of the rear extension cylinder 14 and determines the retreat limit of the input rod 16 is supported by the stopper 6. It is supported by the member 18.
Further, between the piston boss 11 and the stopper support member 18, an atmosphere introduction port 21 opened at the rear end of the rear extension cylinder 14 is provided.
Filters 22 and 22 are attached to purify the introduced air from.
【００１３】後部シェル半体６には、複数のボルト２３
…がかしめ結合されており、それらのボルト２３…およ
び各ボルト２３…に螺合されるナット２４…により後部
シェル半体６すなわちシェル５の後壁が支持パネル２５
に固定される。The rear shell half 6 has a plurality of bolts 23.
Are caulked, and the rear shell half 6 or the rear wall of the shell 5 is supported by the support panel 25 by the bolts 23 and the nuts 24 screwed to the bolts 23.
Fixed to.
【００１４】また前部シェル半体７の内面中央部には補
強板２６が重合、結合されており、この補強板２６とピ
ストンボス１１との間には戻しばね２７が縮設される。
さらに補強板２６が設けられている部分で、前部シェル
半体７には複数のボルト２８…がかしめ結合されてお
り、マスタシリンダＭのシリンダ本体２９に設けられた
フランジ３０が、前記各ボルト２８…と、各ボルト２８
…に螺合されるナット３１…とにより前部シェル半体７
すなわちシェル５の前壁外面に固着される。A reinforcing plate 26 is superposed and coupled to the center of the inner surface of the front shell half body 7, and a return spring 27 is contracted between the reinforcing plate 26 and the piston boss 11.
Further, at the portion where the reinforcing plate 26 is provided, a plurality of bolts 28 ... Are caulked and coupled to the front shell half body 7, and the flange 30 provided on the cylinder body 29 of the master cylinder M has the above-mentioned bolts. 28 ... and each bolt 28
The front shell half 7 by the nut 31 screwed to the
That is, it is fixed to the outer surface of the front wall of the shell 5.
【００１５】ピストンボス１１の前端には出力ピストン
３２が支持されており、該出力ピストン３２から前方に
突出する出力杆３３が、マスタシリンダＭの作動ピスト
ン３４に連接される。An output piston 32 is supported at the front end of the piston boss 11, and an output rod 33 projecting forward from the output piston 32 is connected to an operating piston 34 of the master cylinder M.
【００１６】ピストンボス１１の内部には制御弁Ｖが収
納されており、該制御弁Ｖは、入力杆１６の前後動によ
る弁ピストン１７とピストンボス１１との前後相対移動
に応じて切換作動する。すなわち、制御弁Ｖが切換中立
状態にあるときに弁ピストン１７がピストンボス１１に
対して前進作動すると、制御弁Ｖにより作動室１３が大
気導入口２１を介して大気に連通し、負圧室１２および
作動室１３間の圧力差によりブースタピストン８がピス
トンボス１１とともに前進作動する。また弁ピストン１
７がピストンボス１１に対して後退作動すると、作動室
１３が大気から遮断されて負圧室１２に連通することに
より前記圧力差が消滅し、戻しばね２７の弾発力により
ブースタピストン８がピストンボス１１とともに後退す
る。A control valve V is housed inside the piston boss 11, and the control valve V is switched according to the relative movement of the valve piston 17 and the piston boss 11 in the longitudinal direction due to the longitudinal movement of the input rod 16. . That is, when the valve piston 17 is moved forward with respect to the piston boss 11 while the control valve V is in the switching neutral state, the control valve V causes the working chamber 13 to communicate with the atmosphere through the atmosphere introduction port 21 and the negative pressure chamber. The booster piston 8 moves forward together with the piston boss 11 due to the pressure difference between 12 and the working chamber 13. Also valve piston 1
When 7 moves backward with respect to the piston boss 11, the working chamber 13 is cut off from the atmosphere and communicates with the negative pressure chamber 12 to eliminate the pressure difference, and the elastic force of the return spring 27 causes the booster piston 8 to move to the piston. Retreat with boss 11.
【００１７】ところで、プレートである後部シェル半体
６とボルト２３、ならびにプレートである前部シェル半
体７とボルト２８は、それぞれ本発明に従ってかしめ結
合されるものであり、以下、そのかしめ結合方法につい
て詳細に説明する。By the way, the rear shell half body 6 and the bolt 23, which are plates, and the front shell half body 7 and the bolt 28, which are plates, are respectively caulked according to the present invention. Will be described in detail.
【００１８】先ず後部シェル半体６およびボルト２３の
かしめ結合方法について図２ないし図４を参照しながら
説明すると、ボルト２３は、そのかしめ結合前において
は、少なくとも一部の外周に雄ねじ３６が刻設されたね
じ軸部２３ａと、少なくとも塑性変形前にはねじ軸部２
３ａよりも大径にして該ねじ軸部２３ａの基端に同軸に
連設される変形軸部２３ｂと、該変形軸部２３ｂよりも
大径にして変形軸部２３ｂの基端に同軸に連設される頭
部２３ｃとを備える。而してボルト２３の頭部２３ｃに
おいて後部シェル半体６に対向する面には、環状溝３７
が変形軸部２３ｂと同軸にして設けられるとともに、環
状溝３７を同軸に囲繞するようにして環状に形成される
シールビード３９が後部シェル半体６側に突出するよう
にして一体に設けられる。また塑性変形前の変形軸部２
３ｂの外周には、該変形軸部２３ｂの軸方向に沿って延
びるセレーション部４０が設けられる。First, the caulking connection method of the rear shell half body 6 and the bolt 23 will be described with reference to FIGS. 2 to 4. Before the caulking connection, the bolt 23 has at least a part of its outer circumference with an external thread 36. The screw shaft portion 23a provided and the screw shaft portion 2 at least before plastic deformation.
3a and a deformable shaft portion 23b that is coaxially connected to the base end of the screw shaft portion 23a and has a larger diameter than the deformable shaft portion 23b and is coaxially connected to the base end of the deformable shaft portion 23b. The head 23c is provided. An annular groove 37 is formed on the surface of the head 23c of the bolt 23 facing the rear shell half body 6.
Is provided coaxially with the deformable shaft portion 23b, and a seal bead 39 which is annularly formed so as to coaxially surround the annular groove 37 is integrally provided so as to project toward the rear shell half body 6 side. Also, the deformation shaft 2 before plastic deformation
A serration portion 40 extending along the axial direction of the deformation shaft portion 23b is provided on the outer periphery of the deformation shaft portion 3b.
【００１９】一方、後部シェル半体６には、そのかしめ
結合前に、ボルト２３のねじ軸部２３ａおよび変形軸部
２３ｂを挿通させる貫通孔４１が設けられている。On the other hand, the rear shell half body 6 is provided with a through hole 41 through which the screw shaft portion 23a and the deformation shaft portion 23b of the bolt 23 are inserted before the caulking and coupling thereof.
【００２０】而して後部シェル半体６およびボルト２３
のかしめ結合にあたっては、図３および図４で示すよう
に、変形軸部２３ｂの塑性変形前の外径よりも小径であ
るがねじ軸部２３ａの外径よりも大径に設定された内径
の孔４２を有するかしめ具４３が、孔４２の内径を異な
らせて複数準備される。Thus, the rear shell half 6 and the bolt 23
In the caulking connection, as shown in FIGS. 3 and 4, when the inner diameter of the deformation shaft portion 23b is smaller than the outer diameter of the deformation shaft portion 23b before the plastic deformation, but larger than the outer diameter of the screw shaft portion 23a. A plurality of caulking tools 43 having holes 42 are prepared with different inner diameters of the holes 42.
【００２１】かしめ結合にあたって、ボルト２３は、そ
の頭部２３ｃを固定の受け台４４上に載せて直立姿勢と
され、その状態で頭部２３ｃのシールビード３９に後部
シェル半体６を当接させるとともに貫通孔４１にねじ軸
部２３ａおよび変形軸部２３ｂを挿通させた状態で、上
方からかしめ具４３が下方側すなわち頭部２３ｃ側に押
圧される。これによりかしめ具４３における孔４２の下
端開口縁が変形軸部２３ｂの外周部に全周にわたって食
い込み、変形軸部２３ｂが、後部シェル半体６における
貫通孔４１の周縁部をボルト２３の頭部２３ｃ側に塑性
変形させるようにかしめられ、変形軸部２３ｂで生じた
塑性変形部２３ｂ′が、該塑性変形部２３ｂ′で押圧さ
れることにより後部シェル半体６で生じた塑性変形部
６′を環状溝３７に食い込ませるようにして頭部２３ｃ
との間に挟圧することになる。この際、変形軸部２３ｂ
の外周に設けられていたセレーション部４０が塑性変形
部６′に食い込むことにより、ボルト２３は軸線まわり
の回転を阻止されて後部シェル半体６に結合されること
になる。Upon caulking, the head portion 23c of the bolt 23 is placed on a fixed pedestal 44 to be in an upright posture, and in this state, the rear shell half body 6 is brought into contact with the seal bead 39 of the head portion 23c. At the same time, with the screw shaft portion 23a and the deformation shaft portion 23b inserted in the through hole 41, the caulking tool 43 is pressed downward from above, that is, toward the head 23c. As a result, the lower opening edge of the hole 42 in the caulking tool 43 bites into the outer peripheral portion of the deformation shaft portion 23b over the entire circumference, and the deformation shaft portion 23b causes the peripheral edge portion of the through hole 41 in the rear shell half body 6 to move to the head of the bolt 23. The plastically deformed portion 23b 'produced by the deformation shaft portion 23b is caulked so as to be plastically deformed toward the side 23c, and the plastically deformed portion 6'generated by the rear shell half body 6 by being pressed by the plastic deformation portion 23b'. Head 23c
It will be pinched between and. At this time, the deformation shaft portion 23b
The serration portion 40 provided on the outer periphery of the bolt bites into the plastically deformable portion 6 ′, whereby the bolt 23 is prevented from rotating around the axis and is coupled to the rear shell half body 6.
【００２２】次に前部シェル半体７およびボルト２８の
かしめ結合方法について図５を参照しながら説明する
と、ボルト２８は、そのかしめ結合前においては、少な
くとも一部の外周に雄ねじ４６が刻設されたねじ軸部２
８ａと、少なくとも塑性変形前にはねじ軸部２８ａより
も大径にして該ねじ軸部２８ａの基端に同軸に連設され
る変形軸部２８ｂと、該変形軸部２８ｂよりも大径にし
て変形軸部２８ｂの基端に同軸に連設される頭部２８ｃ
とを備える。而して該ボルト２８の頭部２８ｃにおいて
前部シェル半体７に対向する面には、環状溝４７が変形
軸部２８ｂと同軸にして設けられるとともに、環状溝４
７を同軸に囲繞するようにして環状に形成されるシール
ビード４９が前部シェル半体７側に突出するようにして
一体に設けられ、前部シェル半体７側で前記頭部２８ｃ
の外周部には補強板２６を係合させる環状の係合段部４
５が設けられる。また塑性変形前の変形軸部２８ｂの外
周には、該変形軸部２８ｂの軸方向に沿って延びるセレ
ーション部（図示せず）が設けられる。Next, a method of caulking the front shell half body 7 and the bolt 28 to each other will be described with reference to FIG. 5. The bolt 28 is engraved with a male screw 46 on at least part of its outer periphery before the caulking. Screw shank 2
8a, a deformation shaft portion 28b that is made larger in diameter than the screw shaft portion 28a at least before plastic deformation, and is coaxially connected to the base end of the screw shaft portion 28a, and has a larger diameter than the deformation shaft portion 28b. Head 28c coaxially connected to the base end of the deformation shaft 28b
With. On the surface of the head portion 28c of the bolt 28 facing the front shell half body 7, an annular groove 47 is provided coaxially with the deformation shaft portion 28b, and the annular groove 4 is formed.
An annular seal bead 49 is formed so as to surround 7 coaxially, and is integrally provided so as to project toward the front shell half body 7 side.
An annular engagement step portion 4 for engaging the reinforcing plate 26 is provided on the outer peripheral portion of the
5 are provided. Further, a serration portion (not shown) extending along the axial direction of the deformation shaft portion 28b is provided on the outer periphery of the deformation shaft portion 28b before the plastic deformation.
【００２３】一方、前部シェル半体７には、そのかしめ
結合前に、ボルト２８のねじ軸部２８ａおよび変形軸部
２８ｂを挿通させる貫通孔５１が設けられている。On the other hand, the front shell half body 7 is provided with a through hole 51 through which the screw shaft portion 28a and the deformation shaft portion 28b of the bolt 28 are inserted before the caulking and coupling thereof.
【００２４】而して前部シェル半体７およびボルト２８
のかしめ結合にあたっては、図３および図４で示したよ
うなかしめ具４３により、変形軸部２８ｂの外周部全周
が、前部シェル半体７における貫通孔５１の周縁部をボ
ルト２８の頭部２８ｃ側に塑性変形させるようにかしめ
られ、変形軸部２８ｂで生じた塑性変形部２８ｂ′が、
該塑性変形部２８ｂ′で押圧されることにより前部シェ
ル半体７で生じた塑性変形部７′を、環状溝４７に食い
込ませるようにして頭部２８ｃとの間に挟圧する。Thus, the front shell half 7 and the bolt 28
In the caulking connection, the caulking tool 43 as shown in FIGS. 3 and 4 causes the entire outer peripheral portion of the deformable shaft portion 28b to move the peripheral edge portion of the through hole 51 in the front shell half body 7 to the head of the bolt 28. The portion 28c is caulked so as to be plastically deformed, and the plastically deformed portion 28b 'generated at the deformation shaft portion 28b is
The plastically deformed portion 7'generated in the front shell half body 7 by being pressed by the plastically deformed portion 28b 'is pressed into the annular groove 47 so as to be clamped between the head portion 28c.
【００２５】次にこの実施例の作用について説明する
と、後部シェル半体６およびボルト２３のかしめ結合、
ならびに前部シェル半体７およびボルト２８のかしめ結
合にあたっては、孔４２の内径を異ならせた複数のかし
め具４３が予め準備されており、後部シェル半体６およ
び前部シェル半体７の板厚に応じた内径である孔４２を
有するかしめ具４３が選択される。The operation of this embodiment will now be described. The rear half shell 6 and the bolt 23 are caulked together,
When caulking the front shell half body 7 and the bolt 28, a plurality of caulking tools 43 having different inner diameters of the holes 42 are prepared in advance, and the plates of the rear shell half body 6 and the front shell half body 7 are prepared. A caulking tool 43 having a hole 42 having an inner diameter corresponding to the thickness is selected.
【００２６】すなわち図３および図４で示したように、
後部シェル半体６が比較的薄い板厚ｔ1 を有するもので
あるときには、孔４２の内径Ｄ1 が比較的大きいかしめ
具４３が選択される。それにより後部シェル半体６の板
厚ｔ1 が比較的薄いものであることに伴ってかしめ具４
３による変形軸部２３ｂのかしめ長さが比較的大となる
のに応じて、変形軸部２３ｂのかしめ変形部分の半径方
向に沿う厚さが比較的小さくなるようにして、変形軸部
２３ｂで生じる塑性変形部２３ｂ′の容積を調整するこ
とができ、塑性変形部２３ｂ′の表面が後部シェル半体
６の表面と略同一となるようにして耐久性を向上するこ
とができる。That is, as shown in FIGS. 3 and 4,
When the rear shell half 6 has a relatively thin plate thickness t 1 , the caulking tool 43 having the relatively large inner diameter D 1 of the hole 42 is selected. As a result, since the plate thickness t 1 of the rear shell half body 6 is relatively thin, the caulking tool 4
As the caulking length of the deforming shaft portion 23b according to 3 becomes relatively large, the thickness of the deforming shaft portion 23b along the radial direction of the caulking deformed portion becomes relatively small so that the deforming shaft portion 23b The volume of the plastically deformed portion 23b 'generated can be adjusted, and the surface of the plastically deformed portion 23b' can be made substantially the same as the surface of the rear shell half 6 to improve the durability.
【００２７】一方、図６で示すように、後部シェル半体
６が比較的厚い板厚ｔ2 を有するものであるときには、
孔４２の内径Ｄ2 が比較的小さいかしめ具４３が選択さ
れる。これにより後部シェル半体６の板厚ｔ2 が比較的
厚いものであることに伴ってかしめ具４３による変形軸
部２３ｂのかしめ長さが比較的小となるのに応じて、変
形軸部２３ｂのかしめ変形部分の半径方向に沿う厚さが
比較的大きくなるようにして、塑性変形部２３ｂ′の容
積を調整することができ、塑性変形部２３ｂ′の表面を
後部シェル半体６の表面と略同一面として耐久性を向上
することができる。On the other hand, as shown in FIG. 6, when the rear shell half 6 has a relatively thick plate thickness t 2 ,
A caulking tool 43 having a relatively small inner diameter D 2 of the hole 42 is selected. As a result, the deformation shaft portion 23b is deformed by the caulking length of the deformation shaft portion 23b by the caulking tool 43 as the plate thickness t 2 of the rear shell half body 6 is relatively large. The volume of the plastically deformable portion 23b 'can be adjusted by making the thickness of the caulking and deforming portion relatively large in the radial direction, and the surface of the plastically deformable portion 23b' is made to correspond to the surface of the rear shell half body 6. The durability can be improved by making the surfaces substantially the same.
【００２８】したがって予め複数準備していたかしめ具
４３のうちの１つを後部シェル半体６の板厚に応じて選
択するだけで、同一種類のボルト２３により塑性変形部
２３ｂ′が後部シェル半体６と面一となるようにしたか
しめ結合を達成することができ、かしめ部の耐久性を向
上し、コスト低減を図ることができる。Therefore, only by selecting one of the plurality of caulking tools 43 prepared in advance according to the plate thickness of the rear shell half body 6, the plastically deformable portion 23b 'can be formed by the same type of bolts 23 in the rear shell half body 6. The caulking connection can be achieved so as to be flush with the body 6, the durability of the caulking portion can be improved, and the cost can be reduced.
【００２９】また前部シェル半体７およびボルト２８の
結合構造に関しても、かしめ具４３の選択により、上述
の後部シェル半体６およびボルト２３のかしめ結合構造
と同様にして、前部シェル半体７および補強板２６の板
厚変化にかかわらず、同一種類のボルト２８により塑性
変形部２８ｂ′が前部シェル半体７と面一となるように
したかしめ結合を達成することができる。したがって単
一種類のボルト２８で前部シェル半体７および補強板２
６の板厚変化に対応しつつかしめ部の耐久性を向上し、
コスト低減を図ることができる。Regarding the connecting structure of the front shell half body 7 and the bolt 28, by selecting the caulking tool 43, in the same manner as the caulking connecting structure of the rear shell half body 6 and the bolt 23 described above, the front shell half body is formed. 7 and the reinforcing plate 26, it is possible to achieve the caulking connection in which the plastically deformed portion 28b 'is flush with the front shell half body 7 by the same type of bolt 28 regardless of the change in the plate thickness. Therefore, the front shell half body 7 and the reinforcing plate 2 can be connected to each other with a single type of bolt 28.
Improve the durability of the crimped part while responding to the plate thickness change of 6,
The cost can be reduced.
【００３０】本発明の他の実施例として図７で示すよう
に、かしめ具４３によるかしめ前の後部シェル半体６あ
るいは前部シェル半体７に、その貫通孔４１あるいは５
１の周囲を環状溝３７あるいは４７側に窪ませた凹部５
２が設けられていてもよい。そうすれば、かしめ具４３
によるかしめ結合がより容易となる。As another embodiment of the present invention, as shown in FIG. 7, the rear shell half 6 or the front shell half 7 before being crimped by the crimping tool 43 is provided with a through hole 41 or 5 therethrough.
Recessed portion 5 in which the periphery of 1 is depressed toward the annular groove 37 or 47 side
2 may be provided. Then, the caulking tool 43
This makes caulking and coupling easier.
【００３１】以上、本発明の実施例を詳述したが、本発
明は上記実施例に限定されるものではなく、特許請求の
範囲に記載された本発明を逸脱することなく種々の設計
変更を行なうことが可能である。Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.
【００３２】たとえば、本発明は、負圧ブースタＢの後
部および前部シェル半体６，７とボルト２３，２８との
かしめ結合方法に限定されず、プレートおよびボルトの
かしめ結合方法として広く適用可能である。For example, the present invention is not limited to the caulking connection method of the rear and front shell halves 6 and 7 of the negative pressure booster B and the bolts 23 and 28, and is widely applicable as a caulking connection method of plates and bolts. Is.
【００３３】[0033]
【発明の効果】以上のように本発明によれば、孔の内径
を異ならせた複数のかしめ具を予め準備しておき、プレ
ートの板厚が増大するのに応じて孔の内径が小さなかし
め具を選択してかしめ加工を施すので、プレートの板厚
に応じた内径の孔を有するかしめ具を選択するだけで、
プレートの板厚変化に対して同一種類のボルトにより耐
久性に優れたかしめ結合を達成することができ、コスト
低減に寄与することができる。As described above, according to the present invention, a plurality of caulking tools having different inner diameters of holes are prepared in advance, and the inner diameter of the holes is small as the plate thickness of the plate increases. Since the caulking process is performed by selecting the tool, just select the caulking tool having the hole of the inner diameter according to the plate thickness of the plate,
It is possible to achieve caulking connection with excellent durability by using the same type of bolt with respect to the plate thickness change of the plate, which can contribute to cost reduction.
【図１】一実施例の負圧ブースタの縦断面図である。FIG. 1 is a vertical sectional view of a negative pressure booster according to an embodiment.
【図２】図１の２矢視部拡大図である。FIG. 2 is an enlarged view of a portion indicated by an arrow 2 in FIG.
【図３】図２の構造のかしめ結合前の状態を示す断面図
である。FIG. 3 is a cross-sectional view showing a state of the structure of FIG. 2 before caulking and coupling.
【図４】かしめ具によるかしめ結合終了時の図３に対応
する断面図である。FIG. 4 is a sectional view corresponding to FIG. 3 at the end of caulking connection by a caulking tool.
【図５】図１の５矢視部拡大図である。5 is an enlarged view of a portion indicated by an arrow 5 in FIG.
【図６】プレート板厚を変化させた状態での図４に対応
する断面図である。FIG. 6 is a cross-sectional view corresponding to FIG. 4 with the plate thickness being changed.
【図７】他の実施例の図３に対応する断面図である。FIG. 7 is a sectional view corresponding to FIG. 3 of another embodiment.
６・・・プレートとしての後部シェル半体 ７・・・プレートとしての前部シェル半体 ２３ｂ′，２８ｂ′・・・塑性変形部 ２３，２８・・・ボルト ２３ａ，２８ａ・・・ねじ軸部 ２３ｂ，２８ｂ・・・変形軸部 ２３ｃ，２８ｃ・・・頭部 ３６，４６・・・雄ねじ ３７，４７・・・環状溝 ４２・・・孔 ４３・・・かしめ具 ４１，５１・・・貫通孔 6 ... Rear shell half as plate 7 ... Front shell half as plate 23b ', 28b' ... Plastically deformed portion 23, 28 ... Bolt 23a, 28a ... Screw shaft portion 23b, 28b ... Deformation shaft portion 23c, 28c ... Head portion 36, 46 ... Male screw 37, 47 ... Annular groove 42 ... Hole 43 ... Caulking tool 41, 51 ... Penetration Hole
Claims (1)
（６，７）と、ねじ軸部（２３ａ，２８ａ）の基端が少
なくとも塑性変形前にはねじ軸部（２３ａ，２８ａ）よ
りも大径である変形軸部（２３ｂ，２８ｂ）を介して頭
部（２３ｃ，２８ｃ）に連設されて成るとともに頭部
（２３ｃ，２８ｃ）には変形軸部（２３ｂ，２８ｂ）を
囲繞する環状溝（３７，４７）が設けられるボルト（２
３，２８）とのかしめ結合にあたって、プレート（６，
７）の貫通孔（４１，５１）に変形軸部（２３ｂ，２８
ｂ）およびねじ軸部（２３ａ，２８ａ）を挿通させた状
態で変形軸部（２３ｂ，２８ｂ）の外周部全周を、該変
形軸部（２３ｂ，２８ｂ）の塑性変形前の外径よりも小
径であってねじ軸部（２３ａ，２８ａ）の外径よりも大
径である内径の孔（４２）を有するかしめ具（４３）で
頭部（２３ｃ，２８ｃ）側にかしめることにより、変形
軸部（２３ｂ，２８ｂ）で生じた塑性変形部（２３
ｂ′，２８ｂ′）でプレート（６，７）を頭部（２３
ｃ，２８ｃ）側に挟圧して環状溝（３７，４７）に食い
込ませるようにしたプレート及びボルトのかしめ結合方
法において、孔（４２）の内径を異ならせた複数のかし
め具（４３）を予め準備しておき、プレート（６，７）
の板厚が増大するのに応じて孔（４２）の内径が小さな
かしめ具（４３）を選択してかしめ加工を施すことを特
徴とするプレート及びボルトのかしめ結合方法。1. A plate (6, 7) having a through hole (41, 51) and a base end of a screw shaft portion (23a, 28a) at least before plastic deformation than a screw shaft portion (23a, 28a). An annular shape that is connected to the head portion (23c, 28c) via a large-diameter deformation shaft portion (23b, 28b) and that surrounds the deformation shaft portion (23b, 28b) on the head portion (23c, 28c). Bolts (2) provided with grooves (37, 47)
Plates (6, 6) for caulking with (3, 28)
7) through-holes (41, 51) in the deformation shaft (23b, 28)
b) and the screw shaft portion (23a, 28a) are inserted, the entire outer peripheral portion of the deformation shaft portion (23b, 28b) than the outer diameter of the deformation shaft portion (23b, 28b) before plastic deformation. Deformation by caulking to the head (23c, 28c) side with a caulking tool (43) having a hole (42) having a small diameter and an inner diameter larger than the outer diameter of the screw shaft portions (23a, 28a) Plastic deformation portion (23) generated in the shaft portion (23b, 28b)
b ', 28b') and the plate (6, 7) to the head (23
In the caulking method of caulking the plate and the bolt so as to squeeze into the annular groove (37, 47) by being pressed against the c, 28c) side, a plurality of caulking tools (43) having different inner diameters of the holes (42) are previously prepared. Prepare and plate (6,7)
A caulking method for caulking plates and bolts, wherein caulking is performed by selecting a caulking tool (43) having a small inner diameter of the hole (42) as the plate thickness increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30393194A JP3406098B2 (en) | 1994-12-07 | 1994-12-07 | Caulking method of plate and bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30393194A JP3406098B2 (en) | 1994-12-07 | 1994-12-07 | Caulking method of plate and bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08159132A true JPH08159132A (en) | 1996-06-18 |
| JP3406098B2 JP3406098B2 (en) | 2003-05-12 |
Family
ID=17927009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30393194A Expired - Fee Related JP3406098B2 (en) | 1994-12-07 | 1994-12-07 | Caulking method of plate and bolt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3406098B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11333533A (en) * | 1998-05-22 | 1999-12-07 | Aisin Aw Co Ltd | Calked structural body and manufacture thereof |
-
1994
- 1994-12-07 JP JP30393194A patent/JP3406098B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11333533A (en) * | 1998-05-22 | 1999-12-07 | Aisin Aw Co Ltd | Calked structural body and manufacture thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3406098B2 (en) | 2003-05-12 |
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