JPH05209607A

JPH05209607A - Fastener

Info

Publication number: JPH05209607A
Application number: JP4040402A
Authority: JP
Inventors: Yoshiharu Miki; 珍治三木
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-01-30
Filing date: 1992-01-30
Publication date: 1993-08-20

Abstract

PURPOSE:To enable strong fastening in a device wherein a shaft and a boss are fastened through a key fastening structure by welding a thin plate onto a key main body while forming a sealed space, sealing pressure medium in the space by means of a pressure supplying means, and thereby expanding the thin plate. CONSTITUTION:A key main body 2 being cross sectionally T-shaped has a lower narrow portion 2b which is fitted to a key groove 6 of a shaft 4. A circumference of a thin plate 8 is fixed to an upper surface of a wide portion 2a of the key main body 2, and a sealed space 10 is formed between the thin plate 8 and the upper surface of the wide portion 2a. Pressure medium such as oil is sealed in the space 10. A tube portion 12 is formed on one end of the key main body 2. An inner diametral portion of the tube portion 12 is communicated with the space 10 through a hole 14. A pressure screw 16 is screwed with a thread hole formed on the inner diametral portion of the tube portion 12. By fastening the pressure screw 16, pressure is applied to the pressure medium inside the space 10, and the thin plate 8 is expanded so as to be strongly pressurized against an inner surface of a key groove 20 on the side of a boss.

Description

Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、軸とボスとを締結する
ための締結具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener for fastening a shaft and a boss.

【０００２】[0002]

【従来の技術】此種の締結具として、キー締結構造とセ
ットねじの締付けを利用したものが従来知られている。2. Description of the Related Art As a fastener of this type, a fastener utilizing a key fastening structure and a set screw fastening is conventionally known.

【０００３】[0003]

【発明が解決しようとする問題点】上記構成によると、
軸とボスとの間にすべりが発生し、両者間に微動摩耗が
発生する欠陥が存した。本発明は上記欠陥を除去するこ
とを目的とするものである。[Problems to be Solved by the Invention] According to the above configuration,
There was a defect that slip occurred between the shaft and the boss, and fine motion wear occurred between them. The present invention aims to eliminate the above defects.

【０００４】[0004]

【問題点を解決する手段】上記目的を達成するため、本
発明は、キー溝６が形成された軸４と、該軸４に嵌合さ
れキー溝２０が形成されたボス１８とを締結固定する締
結具において、薄板８が溶接され、該薄板８で囲まれた
空間部分１０に液体から成る圧力媒体が封入され、該圧
力媒体に圧力を付与する手段を備えたキー本体２のキー
部を、前記キー溝６，２０に嵌合配置したものである。In order to achieve the above object, the present invention fastens and fixes a shaft 4 having a key groove 6 formed therein and a boss 18 fitted to the shaft 4 and having a key groove 20 formed therein. In the fastener described above, the thin plate 8 is welded, the pressure medium made of a liquid is sealed in the space portion 10 surrounded by the thin plate 8, and the key portion of the key main body 2 provided with means for applying pressure to the pressure medium is used. The key grooves 6 and 20 are fitted and arranged.

【０００５】[0005]

【作用】圧力媒体に圧力をかけると、キー本体２に溶接
されている薄板８が膨張し、該薄板８がこれに対向する
キー溝２０の壁面を強圧する。この強圧力の反力によっ
て軸４とボス１８間に大きな摩擦力が発生し、軸４とボ
ス１８とは強固に締結される。When pressure is applied to the pressure medium, the thin plate 8 welded to the key body 2 expands, and the thin plate 8 strongly presses the wall surface of the key groove 20 opposed thereto. Due to the reaction force of this strong pressure, a large frictional force is generated between the shaft 4 and the boss 18, and the shaft 4 and the boss 18 are firmly fastened together.

【０００６】[0006]

【実施例】以下に本発明の構成を添付図面に示す実施例
を参照して詳細に説明する。２は断面形状がＴ型のキー
本体であり、その下部幅狭部２ｂが軸４のキー溝６に嵌
合している。前記キー本体２の幅広部２ａの上面には薄
板８の周囲が固着され、該薄板８と幅広部２ａの上面と
の間に密封された空間部１０が形成され、該空間部１０
にオイルなどの圧力媒体が封入されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. Reference numeral 2 is a key body having a T-shaped cross section, and a lower narrow portion 2b thereof is fitted in a key groove 6 of a shaft 4. The periphery of the thin plate 8 is fixed to the upper surface of the wide portion 2a of the key body 2, and a sealed space portion 10 is formed between the thin plate 8 and the upper surface of the wide portion 2a.
A pressure medium such as oil is enclosed in.

【０００７】前記キー本体２の一端には管状部１２が形
成され該管状部１２の内径部と前記空間部１０とは、キ
ー本体２に穿設された孔１４を通じて連通している。前
記管状部１２の内径部にはねじ穴が形成され、該ねじ穴
にプレッシャースクリュー１６がねじ込まれている。前
記キー本体２の幅広部２ａは、ボス１８の内径部に形成
されたキー溝２０内に嵌入配置されている。A tubular portion 12 is formed at one end of the key body 2, and the inner diameter portion of the tubular portion 12 and the space portion 10 are communicated with each other through a hole 14 formed in the key body 2. A screw hole is formed in the inner diameter portion of the tubular portion 12, and a pressure screw 16 is screwed into the screw hole. The wide portion 2a of the key body 2 is fitted and arranged in the key groove 20 formed in the inner diameter portion of the boss 18.

【０００８】前記軸４側のキー溝６の寸法は標準寸法が
採用され、ボス１８側のキー溝２０の寸法は、高さが標
準のままで、幅がキー溝６の約２倍となっている。ま
た、ハメアイ公差はすべてスキマバメに設定されてい
る。前記管状部１２は前記ボス１８の端部の外方に突出
配置されている。The size of the key groove 6 on the shaft 4 side is a standard size, and the size of the key groove 20 on the boss 18 side is about twice the width of the key groove 6 with the standard height. ing. In addition, the all-tolerance tolerances are set to clearance. The tubular portion 12 is arranged so as to project outward from the end of the boss 18.

【０００９】上記した構成において、プレッシャースク
リュー１６をねじ穴に対してねじ込むと、空間部１０内
に封入されている液体即ち圧力媒体に圧力がかかり、キ
ー本体２のキー部に溶接されている薄板８が膨張し、該
薄板８の表面がボス１８側キー溝２０の天井部を強圧す
る。In the above structure, when the pressure screw 16 is screwed into the screw hole, pressure is applied to the liquid, that is, the pressure medium, sealed in the space portion 10, and the thin plate welded to the key portion of the key body 2 is welded. 8 expands, and the surface of the thin plate 8 strongly presses the ceiling portion of the key groove 20 on the boss 18 side.

【００１０】これにより、軸１８のキー溝６側とは反対
側の、ボス１８の内径部と接触する部分に摩擦力が発生
し、ボス１８と軸４とは互いに締結される。もしすべり
が生じても、キー本体２のキー部のせん断力が作用す
る。As a result, a frictional force is generated at a portion of the shaft 18 on the side opposite to the key groove 6 side and in contact with the inner diameter portion of the boss 18, and the boss 18 and the shaft 4 are fastened to each other. Even if slippage occurs, the shearing force of the key portion of the key body 2 acts.

【００１１】[0011]

【効果】本発明は上述の如く構成したので、軸とボスと
を簡単な構成で強固に締結することができる効果が存す
る。Since the present invention is configured as described above, there is an effect that the shaft and the boss can be firmly fastened with a simple structure.

[Brief description of drawings]

【図１】全体断面図である。FIG. 1 is an overall sectional view.

【図２】キー本体の断面図である。FIG. 2 is a sectional view of a key body.

[Explanation of symbols]

２キー本体４軸６キー溝８薄板１０空間部１２管状部１４孔１６プレッシャースクリュー１８ボス２０キー溝 2 Key body 4 Shaft 6 Key groove 8 Thin plate 10 Space part 12 Tubular part 14 Hole 16 Pressure screw 18 Boss 20 Key groove

Claims

[Claims]

1. A fastener for fastening and fixing a shaft 4 having a key groove 6 and a boss 18 fitted to the shaft 4 and having a key groove 20 formed by welding a thin plate 8 to the thin plate 8. A pressure medium made of a liquid is enclosed in a space portion 10 surrounded by, and the key portion of the key body 2 having means for applying pressure to the pressure medium is fitted and arranged in the key grooves 6 and 20. Featured fasteners.

2. The key groove 20 on the boss 18 side is formed in the shaft 4
The key body 2 is formed wider than the side key groove 6
Is formed by a narrow portion 2b and a wide portion 2a, the thin plate 8 is welded to the wide portion 2a, and the narrow portion 2b is fitted into the key groove 6 on the shaft 4 side to form the wide portion. The portion 2a to the boss 1
A fastener that is fitted in the key groove 20 on the 8 side.