JPH06312323A - Hollow movable shaft - Google Patents
Hollow movable shaftInfo
- Publication number
- JPH06312323A JPH06312323A JP5099718A JP9971893A JPH06312323A JP H06312323 A JPH06312323 A JP H06312323A JP 5099718 A JP5099718 A JP 5099718A JP 9971893 A JP9971893 A JP 9971893A JP H06312323 A JPH06312323 A JP H06312323A
- Authority
- JP
- Japan
- Prior art keywords
- press
- shaft
- main body
- end member
- fitting
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0475—Hollow camshafts
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Automatic Assembly (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車のエンジンに用
いられるカムシャフトなどの中空可動軸に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow movable shaft such as a cam shaft used in an automobile engine.
【０００２】[0002]
【従来の技術】自動車のエンジンに用いられるカムシャ
フトは、従来、鋳鉄製のものが多かった。これに対し
て、カムの耐摩耗性を高めるために、焼結合金からなる
カムを鋼製の軸本体に組み付けたカムシャフトが用いら
れるようになった。また、軽量化のために、軸本体を中
空な管状のものとすることも行われるようになった。こ
のように軸本体とカムとを別体とした場合、カムの組み
付けは圧入であるため、軸本体は直線的なものでなけれ
ばならない。これに対して、カムシャフトの端部は、そ
の支持などのために所定の形状を有していなければなら
ないので、カムの組み付け後に、軸本体の端部に別体の
端部部材を組み付けるようにしている。この端部部材
は、従来、例えばろう付けにより軸本体に固定している
が、ろう付けでは、熱による歪みの発生等の問題があ
る。2. Description of the Related Art Conventionally, many camshafts used for automobile engines are made of cast iron. On the other hand, in order to improve the wear resistance of the cam, a cam shaft in which a cam made of a sintered alloy is assembled to a steel shaft body has come to be used. Further, in order to reduce the weight, it has also been practiced to make the shaft main body into a hollow tubular shape. When the shaft body and the cam are separated from each other in this way, the cam body is press-fitted, so the shaft body must be linear. On the other hand, the end of the camshaft must have a predetermined shape for supporting it, so after mounting the cam, attach a separate end member to the end of the shaft body. I have to. Conventionally, this end member is fixed to the shaft body by, for example, brazing. However, brazing has a problem such as distortion due to heat.
【０００３】これに対して、特開昭63-89229号公報に
は、図７に示すように、管状の軸本体１に圧入される端
部部材２の圧入部３の外周面に三角歯セレーション状の
凹凸部４を形成し、その山部4aを軸本体１の内周面に食
い込ませることにより、軸本体１に端部部材２を組み付
けることが提案されている。そして、従来の端部部材２
において、凹凸部４の山部4aは、単一峰状に尖った形状
になっていた。しかし、このように尖った山部4aでは、
軸本体１内に圧入部３を圧入するのに大きな力が要るに
もかかわらず、山部4aの稜部が破損しやすく、ねじれな
どに対して弱い。On the other hand, in Japanese Patent Laid-Open No. 63-89229, as shown in FIG. 7, triangular tooth serrations are formed on the outer peripheral surface of the press-fitting portion 3 of the end member 2 which is press-fitted into the tubular shaft body 1. It has been proposed that the end member 2 is assembled to the shaft body 1 by forming a concave-convex portion 4 and causing the mountain portion 4a to bite into the inner peripheral surface of the shaft body 1. And the conventional end member 2
In the above, the peak portion 4a of the uneven portion 4 had a single-peaked shape. However, in such a sharp mountain portion 4a,
Although a large force is required to press-fit the press-fitting portion 3 into the shaft body 1, the ridges of the ridges 4a are easily damaged and are weak against twisting.
【０００４】[0004]
【発明が解決しようとする課題】前述のように、端部部
材の圧入部の外周面にセレーション状の凹凸部を形成
し、この凹凸部の山部を軸本体の内周面に食い込ませる
ことにより、この軸部材に端部部材を固定する従来のカ
ムシャフトにおいては、凹凸部の山部が尖った形状にな
っていたため、軸本体内に圧入部を圧入するのに大きな
力が要るにもかかわらず、山部の稜部が破損しやすく、
ねじれなどに対して弱い問題があった。As described above, the serration-shaped uneven portion is formed on the outer peripheral surface of the press-fitting portion of the end member, and the peak portion of this uneven portion is cut into the inner peripheral surface of the shaft body. Therefore, in the conventional camshaft in which the end member is fixed to the shaft member, since the peaks and depressions of the concave and convex portions are sharp, a large force is required to press-fit the press-fitting portion into the shaft body. However, the ridge of the mountain is easily damaged,
There was a problem that it was weak against twisting.
【０００５】本発明は、このような問題点を解決しよう
とするもので、管状の軸本体の端部に端部部材を組み付
けるために、セレーション状の凹凸部を形成した端部部
材の圧入部を軸本体内に圧入するカムシャフトなどの中
空可動軸において、軸本体内への圧入部の圧入を容易に
するとともに、ねじれなどに対する強度を高めることを
目的とする。The present invention is intended to solve such a problem, and in order to assemble the end member to the end of the tubular shaft main body, the press-fitting portion of the end member having the serrated uneven portion is formed. In a hollow movable shaft such as a cam shaft in which a shaft is press-fitted into the shaft main body, it is an object to facilitate press-fitting of the press-fitting portion into the shaft main body and increase strength against twisting and the like.
【０００６】[0006]
【課題を解決するための手段】本発明は、前記目的を達
成するために、金属製の管状の軸本体と、この軸本体の
端部に組み付けられる金属製の端部部材とを備え、この
端部部材は、軸本体内に圧入される圧入部を有し、この
圧入部は、セレーション状の凹凸部を外周面に有し、こ
の凹凸部の山部を軸本体の内周面に食い込ませた中空可
動軸において、前記凹凸部の山部の稜部に凹溝部を有す
るものである。In order to achieve the above-mentioned object, the present invention comprises a metallic tubular shaft body and a metallic end member assembled to the end of the shaft body. The end member has a press-fitting portion that is press-fitted into the shaft body, and the press-fitting portion has serration-shaped irregularities on the outer peripheral surface, and the peaks of the irregularities bite into the inner peripheral surface of the shaft body. In the hollow movable shaft, the recessed groove portion is provided on the ridge portion of the mountain portion of the uneven portion.
【０００７】[0007]
【作用】本発明の中空可動軸では、管状の軸本体の端部
に端部部材を組み付けるとき、端部部材の圧入部を軸本
体内に圧入するが、この圧入部のセレーション状の凹凸
部の山部が軸本体の内周面に食い込むことにより、軸本
体に端部部材が固定される。前記圧入部の圧入時、凹凸
部の山部が稜部に凹溝部を有するものであるために、圧
入に要する力が少なくて済み、かつ、山部の稜部が破損
しにくくなることにより、ねじれなどに対する強度が高
くなる。In the hollow movable shaft of the present invention, when the end member is assembled to the end of the tubular shaft body, the press-fitting portion of the end member is press-fitted into the shaft body. The mountain portion of the bite bites into the inner peripheral surface of the shaft body, whereby the end member is fixed to the shaft body. At the time of press-fitting the press-fitting portion, since the mountain portion of the uneven portion has the concave groove portion on the ridge portion, the force required for press-fitting can be small, and the ridge portion of the mountain portion is less likely to be damaged, Strength against twisting increases.
【０００８】[0008]
【実施例】以下、本発明の一実施例について、図１から
図６を参照しながら説明する。本実施例の中空可動軸
は、自動車のエンジンに用いられるカムシャフトであ
り、その全体を図４に示してある。同図において、11は
鋼製の軸本体で、この軸本体11は円筒形管状になってい
る。そして、軸本体11の外周中間部には、焼結合金から
なるカム12およびジャーナル13が複数固定されている。
これらカム12およびジャーナル13は、その内周面と軸本
体11の外周面との圧接により、この軸本体11に固定され
ている。また、軸本体11の両端部には、その開口を閉塞
する端部部材16，17がそれぞれ組み付けられている。こ
れら端部部材16，17は、熱処理していない、すなわち焼
入していない鋼材からなっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The hollow movable shaft of this embodiment is a camshaft used in an automobile engine, and its whole is shown in FIG. In the figure, 11 is a steel shaft main body, and the shaft main body 11 has a cylindrical tubular shape. A plurality of cams 12 and journals 13 made of a sintered alloy are fixed to the intermediate portion of the outer periphery of the shaft body 11.
The cam 12 and the journal 13 are fixed to the shaft body 11 by pressure contact between the inner peripheral surface of the cam 12 and the outer peripheral surface of the shaft body 11. In addition, end members 16 and 17 that close the opening are respectively attached to both ends of the shaft body 11. These end members 16 and 17 are made of steel that has not been heat treated, that is, not quenched.
【０００９】一方の端部部材16は、図３に示すように、
円柱形状のフランジ21と、このフランジ21から同軸的に
突出したほぼ円柱形状の圧入部22とを有している。この
圧入部22は、軸本体11内に同軸的に圧入されるものであ
り、フランジ21は、軸本体11の端面に突き当たるもので
ある。そして、圧入部22の外周面には、その軸方向に沿
う三角歯セレーション状の凹凸部23が形成されている。
凹凸部23の大径ｒは軸本体11の内径よりも大きく、小径
は同内径よりも小さい。そして、図１に示すように、凹
凸部23は、その山部23a の稜部に凹溝部24を有するもの
になっている。図２に示すように、凹凸部23の大径を
ｄ、山部23a の全高をｈとすると、凹溝部24の深さａ
は、最大ｈ／３程度である。なお、凹溝部24の形成につ
いては、後述する。さらに、嵌合部22のフランジ21側の
基部は、凹凸部23のない首部25となっている。この首部
25の径は、凹凸部23の小径とほぼ等しい。また、圧入部
22におけるフランジ21と反対側の先端面には、凹窪部26
が同心的に形成されている。さらに、圧入部22の外周面
先端部はテーパー部27となっている。The one end member 16 is, as shown in FIG.
It has a columnar flange 21 and a substantially columnar press-fitting portion 22 that coaxially projects from the flange 21. The press-fitting portion 22 is coaxially press-fitted into the shaft body 11, and the flange 21 abuts the end surface of the shaft body 11. Then, on the outer peripheral surface of the press-fitting portion 22, there are formed serrations 23 having a triangular tooth serration shape along the axial direction thereof.
The large diameter r of the uneven portion 23 is larger than the inner diameter of the shaft body 11, and the small diameter thereof is smaller than the same inner diameter. Then, as shown in FIG. 1, the concave-convex portion 23 has a concave groove portion 24 at the ridge portion of the mountain portion 23a. As shown in FIG. 2, if the large diameter of the concave and convex portion 23 is d and the total height of the peak portion 23a is h, the depth a of the concave groove portion 24 is a.
Is a maximum of about h / 3. The formation of the groove 24 will be described later. Further, the base portion of the fitting portion 22 on the flange 21 side is a neck portion 25 having no uneven portion 23. This neck
The diameter of 25 is substantially equal to the small diameter of the uneven portion 23. Also, press-fitting section
A concave portion 26 is formed on the tip end surface of the groove 22 opposite to the flange 21.
Are formed concentrically. Further, the tip of the outer peripheral surface of the press-fitting portion 22 is a tapered portion 27.
【００１０】つぎに、前記端部部材16の製造について説
明する。この端部部材16の圧入部22の凹凸部23は、ロー
ル加工（転造）により形成されるものであり、それに用
いるロール加工機の概略を図５に示してある。同図にお
いて、31は機枠で、この機枠31にはワーク保持軸32が軸
支されている。このワーク保持軸32は、図示していない
モーターから動力が伝達されて回転駆動されるものであ
る。また、機枠31にはワーク固定軸33が回転自在に設け
られている。このワーク固定軸33は、前記ワーク保持軸
32に対して同軸的に移動するものである。さらに、機枠
31には、左右一対のローラー台34が設けられている。こ
れらローラー台34は、ワーク保持軸32およびワーク固定
軸33を挟んで位置しており、油圧シリンダー35の駆動に
より左右方向へ移動するものである。そして、両ローラ
ー台34には、それぞれローラーダイス36が回転軸37によ
り回転自在に支持されている。これら回転軸37は、前記
ワーク保持軸32と平行であって、モーターから動力が伝
達され、ワーク保持軸32と同期して回転駆動されるもの
である。Next, the manufacture of the end member 16 will be described. The concavo-convex portion 23 of the press-fitting portion 22 of the end member 16 is formed by roll processing (rolling), and an outline of a roll processing machine used for it is shown in FIG. In the figure, 31 is a machine frame, and a work holding shaft 32 is pivotally supported on the machine frame 31. The work holding shaft 32 is rotationally driven by transmitting power from a motor (not shown). Further, a work fixed shaft 33 is rotatably provided on the machine frame 31. The work fixing shaft 33 is the work holding shaft.
It moves coaxially with 32. In addition, machine frame
A pair of left and right roller bases 34 are provided on 31. The roller bases 34 are located with the work holding shaft 32 and the work fixing shaft 33 interposed therebetween, and are moved in the left-right direction by driving the hydraulic cylinder 35. A roller die 36 is rotatably supported on both roller bases 34 by a rotary shaft 37. These rotating shafts 37 are parallel to the work holding shaft 32, and are driven by the power transmitted from a motor in synchronization with the work holding shaft 32.
【００１１】そして、凹窪部26を形成した後に、凹凸部
23を形成する。このロール加工に際しては、ワークであ
る端部部材16をワーク保持軸32に装着した後、ワーク固
定軸33を端部部材16の方へ移動させて、これらワーク保
持軸32とワーク固定軸33とにより端部部材16を挟み込ん
で固定する。そして、ローラー台34を端部部材16の方へ
移動させて、この端部部材16の圧入部22の外周面に一対
のローラーダイス36の外周面を圧接させる。これととも
に、ワーク保持軸32および両ローラーダイス36を同期し
て回転させる。これにより、端部部材16の圧入部22の外
周面に凹凸部23が形成される。After forming the concave portion 26, the concave and convex portion is formed.
Form 23. In this roll processing, after mounting the end member 16 which is a work on the work holding shaft 32, the work fixing shaft 33 is moved toward the end member 16, and the work holding shaft 32 and the work fixing shaft 33 are The end member 16 is sandwiched and fixed by. Then, the roller base 34 is moved toward the end member 16, and the outer peripheral surfaces of the pair of roller dies 36 are brought into pressure contact with the outer peripheral surface of the press-fitting portion 22 of the end member 16. At the same time, the work holding shaft 32 and both roller dies 36 are synchronously rotated. As a result, the uneven portion 23 is formed on the outer peripheral surface of the press-fitting portion 22 of the end member 16.
【００１２】このロール加工時、図６（ａ）に鎖線で示
すように、はじめ円柱面をなしている圧入部22の外周面
は、同図に実線で示すように、ローラーダイス36の歯38
の谷の両面にそれぞれ沿って盛り上がるように次第に塑
性変形していく。したがって、ロール加工の中間段階で
は、形成された凹凸部23の山部23a とローラーダイス36
の歯38の谷との間にまだ隙間があり、山部23a は、稜部
に凹溝部24を有するものになる。そして、ロール加工の
進行に伴い、山部23a が高くなっていくと、図６（ｂ）
に示すように、最終的にローラーダイス36の歯38の谷の
両面にそれぞれ沿って盛り上がった部分が一つになっ
て、歯38の谷を山部23a が埋める。すなわち、凹溝部24
もなくなり、山部23a は、尖った単一峰状のものにな
る。従来は、この段階までロール加工を続けていたので
あるが、前記中間段階でロール加工を止めることによ
り、最終的にも、稜部に凹溝部24を有する山部23a とな
る。At the time of this roll processing, the outer peripheral surface of the press-fitting portion 22, which initially forms a cylindrical surface as shown by the chain line in FIG. 6A, has teeth 38 of the roller die 36 as shown by the solid line in the figure.
It gradually undergoes plastic deformation so as to rise along both sides of the valley. Therefore, in the intermediate stage of the roll processing, the crests 23a of the formed uneven portion 23 and the roller die 36
There is still a gap between the tooth 38 and the valley of the tooth 38, and the mountain portion 23a has the concave groove portion 24 at the ridge portion. Then, as the roll processing progresses, the height of the mountain portion 23a increases, and as shown in FIG.
As shown in FIG. 7, finally, the raised portions along both sides of the valleys of the teeth 38 of the roller die 36 become one, and the valleys of the teeth 38 are filled with the ridges 23a. That is, the groove 24
The mountain portion 23a becomes a pointed single peak. Conventionally, the roll processing was continued up to this stage, but by stopping the roll processing at the intermediate stage, the peak 23a having the concave groove 24 at the ridge is finally obtained.
【００１３】また、ロール加工時、転造用のローラーダ
イス36は、圧入部22に対して径方向内方へ圧を加えるこ
とになるが、圧入部22の先端面に凹窪部26があるため
に、この圧入部22の先端部は、ほぼテーパー状に径が小
さくなるように若干塑性変形する。そのテーパー部27の
先端の大径は、軸本体11の内径よりも若干小さくなる。
テーパー部27は、軸本体11内に圧入部22を圧入する際の
案内となり、したがって、圧入部22の外周面先端部や軸
本体11の内周面先端部に面取り部を別途加工する必要は
ない。Further, at the time of roll processing, the rolling roller die 36 applies pressure to the press-fitting portion 22 inward in the radial direction, but there is a concave recess 26 on the tip surface of the press-fitting portion 22. Therefore, the tip portion of the press-fitting portion 22 is slightly plastically deformed so that the diameter becomes substantially tapered. The large diameter at the tip of the tapered portion 27 is slightly smaller than the inner diameter of the shaft body 11.
The tapered portion 27 serves as a guide when the press-fitting portion 22 is press-fitted into the shaft body 11, and therefore, it is not necessary to separately process a chamfered portion on the outer peripheral surface tip portion of the press-fitting portion 22 or the inner peripheral surface tip portion of the shaft body 11. Absent.
【００１４】そして、軸本体11に端部部材16を組み付け
るときには、端部部材16の圧入部22を軸本体11内に圧入
し、フランジ21を軸本体11の端面に突き当てる。この状
態で、図３に示すように、圧入部22の凹凸部23の山部23
a が軸本体11の内周面に食い込み、これにより、軸本体
11に端部部材16が固定される。前記圧入部22の圧入時、
この圧入部22の先端部のテーパー部27がまず軸本体11内
に入り、圧入の案内となる。ついで、凹凸部23の山部23
a が軸本体11の内周面に突き当たって食い込み始める
が、圧入部22の先端面に凹窪部26があるので、このと
き、圧入部22の先端部は、容易に径が小さくなるように
変形（縮径）する。これにより、軸本体11と圧入部22と
の最初の芯合わせも円滑になされることになり、圧入部
22を容易かつ円滑に軸本体11内に圧入できる。また、特
に圧入部22の先端部以外においては、凹凸部23の山部23
a が軸本体11の内周面にしっかりと食い込み、端部部材
16が軸本体11に確実に固定される。When the end member 16 is assembled to the shaft body 11, the press-fitting portion 22 of the end member 16 is press-fitted into the shaft body 11 and the flange 21 is abutted against the end surface of the shaft body 11. In this state, as shown in FIG.
a bites into the inner peripheral surface of the shaft main body 11, and
The end member 16 is fixed to 11. When press-fitting the press-fitting portion 22,
The tapered portion 27 at the tip of the press-fitting portion 22 first enters the shaft main body 11 and serves as a guide for press-fitting. Then, the mountain portion 23 of the uneven portion 23
a hits the inner peripheral surface of the shaft body 11 and begins to bite, but since there is a concave recess 26 on the tip surface of the press-fitting portion 22, at this time, the tip portion of the press-fitting portion 22 can be easily reduced in diameter. Deform (reduce). As a result, the first alignment between the shaft body 11 and the press-fitting portion 22 can be smoothly performed, and the press-fitting portion
22 can be easily and smoothly pressed into the shaft body 11. In addition, in particular, except for the tip end portion of the press-fitting portion 22, the peak portion 23 of the uneven portion 23 is formed.
a firmly bites into the inner peripheral surface of the shaft body 11, and the end member
16 is securely fixed to the shaft body 11.
【００１５】また、凹凸部23の山部23a が稜部に凹溝部
24を有するものとなっているので、圧入部22の圧入に要
する力が小さくて済み、圧入をいっそう容易にできる。
これとともに、山部23a の稜部が破損しにくくなること
により、ねじれなどに対する強度が高くなり、信頼性が
向上する。Further, the peak portion 23a of the uneven portion 23 is a groove portion at the ridge.
Since it has 24, the force required for press-fitting the press-fitting portion 22 can be small, and the press-fitting can be made easier.
At the same time, the ridges of the ridges 23a are less likely to be damaged, so that the strength against twisting is increased and the reliability is improved.
【００１６】最大ねじりトルクの測定結果を表１に示し
てある。この測定は、凹凸部23の大径ｄを20mmとして実
施したものである。同表において、「本発明」の欄に
は、山部23a の稜部に凹溝部24を有するものについての
結果を示してあり、「比較例」の欄には、山部が単一峰
状に尖ったものについての結果を示してある。それぞれ
について、軸本体11への山部23a の圧入代を0.1mm 、0.
2mm 、0.3mm とした場合の圧入力およびねじりトルクを
示してある。表から明らかなように、圧入代が同じ場
合、圧入力すなわち端部部材16の圧入部22を軸本体11内
に圧入するのに要する力は、凹溝部24を有するものの方
が小さくなっている。また、ねじりトルクは、凹溝部24
を有するものの方が大きくなっている。すなわち、凹溝
部24を有するものの方が、ねじれに対する強度が高くな
っている。The results of measurement of the maximum torsional torque are shown in Table 1. This measurement is carried out with the large diameter d of the uneven portion 23 set to 20 mm. In the same table, in the column of "present invention", the results are shown for those having the concave groove portion 24 on the ridge portion of the mountain portion 23a, and in the column of "Comparative example", the mountain portion has a single peak shape. The results for the pointed ones are shown. For each of them, the press-fitting margin of the crest portion 23a into the shaft body 11 is 0.1 mm, 0.
The press-in force and torsion torque when 2mm and 0.3mm are shown. As is clear from the table, when the press-fitting margin is the same, the force required to press-fit the press-fitting portion 22 of the end member 16 into the shaft main body 11 is smaller in the one having the concave groove portion 24. . Also, the twisting torque is
The one with is larger. That is, the one having the concave groove portion 24 has higher strength against twisting.
【００１７】[0017]
【表１】 [Table 1]
【００１８】なお、他方の端部部材17も、図示していな
いが、前記一方の端部部材16と同様に、外周面に凹凸部
を有する圧入部が軸本体11内に圧入されたものである。Although not shown, the other end member 17 is also one in which, like the one end member 16, a press-fitting portion having an uneven portion on its outer peripheral surface is press-fitted into the shaft body 11. is there.
【００１９】さらに、本発明は、前記実施例に限定され
るものではなく、種々の変形実施が可能である。例え
ば、前記実施例の中空可動軸は、自動車のエンジンに用
いられるカムシャフトであったが、それに限るものでは
なく、ロータリーコンプレッサーのシャフトなど他の中
空可動軸にも本発明を適用できる。また、材質について
も、軸本体や端部部材は、鋼製のものに限らない。Furthermore, the present invention is not limited to the above embodiment, but various modifications can be made. For example, the hollow movable shaft of the above-mentioned embodiment is a cam shaft used for an automobile engine, but the present invention is not limited to this, and the present invention can be applied to other hollow movable shafts such as a shaft of a rotary compressor. Also, regarding the material, the shaft body and the end member are not limited to those made of steel.
【００２０】[0020]
【発明の効果】本発明によれば、管状の軸本体の端部に
端部部材を組み付けるために、セレーション状の凹凸部
を形成した端部部材の圧入部を軸本体内に圧入する中空
可動軸において、凹凸部の山部が稜部に凹溝部を有する
ものとしたので、軸本体内に圧入部を圧入するのに要す
る力が少なくて済み、圧入を容易にできるとともに、山
部の稜部が破損しにくくなることにより、ねじれなどに
対する強度が高くなり、信頼性が向上する。According to the present invention, in order to assemble the end member to the end of the tubular shaft body, the hollow movable body is formed by press-fitting the press-fitting portion of the end member having the serration-like uneven portion. In the shaft, the ridges of the concavo-convex part have concave grooves on the ridges, so the force required to press-fit the press-fitting parts into the shaft body is small, and the press-fitting can be facilitated and the ridges of the ridges Since the parts are less likely to be damaged, the strength against twisting is increased and the reliability is improved.
【図１】本発明の一実施例を示すもので、中空可動軸で
あるカムシャフトの一部の横断面図である。FIG. 1 shows an embodiment of the present invention and is a cross-sectional view of a part of a cam shaft which is a hollow movable shaft.
【図２】同上凹凸部の拡大図である。FIG. 2 is an enlarged view of the uneven portion.
【図３】同上一部を断面にした側面図である。FIG. 3 is a side view in which a part of the same is shown in section.
【図４】同上カムシャフト全体の斜視図である。FIG. 4 is a perspective view of the same camshaft as a whole.
【図５】同上凹凸部の加工に用いるロール加工機の概略
水平断面図である。FIG. 5 is a schematic horizontal sectional view of a roll processing machine used for processing the uneven portion.
【図６】同上ロール加工の作用を示す説明図である。FIG. 6 is an explanatory view showing the action of roll processing.
【図７】従来のカムシャフトの一例を示す一部の横断面
図である。FIG. 7 is a partial cross-sectional view showing an example of a conventional camshaft.
11 軸本体 16 端部部材 17 端部部材 22 圧入部 23 凹凸部 24 凹溝部 11 Shaft body 16 End member 17 End member 22 Press-fitting section 23 Concavo-convex section 24 Recessed groove section
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ１６Ｃ 3/02 9242−3Ｊ Ｆ１６Ｄ 1/06 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location F16C 3/02 9242-3J F16D 1/06
Claims (1)
端部に組み付けられる金属製の端部部材とを備え、この
端部部材は、軸本体内に圧入される圧入部を有し、この
圧入部は、セレーション状の凹凸部を外周面に有し、こ
の凹凸部の山部を軸本体の内周面に食い込ませた中空可
動軸において、前記凹凸部の山部の稜部に凹溝部を有す
ることを特徴とする中空可動軸。1. A metal tubular shaft main body and a metal end member assembled to an end of the shaft main body, the end member having a press-fitting portion press-fitted into the shaft main body. However, this press-fitting portion has a serrated uneven portion on the outer peripheral surface, and in the hollow movable shaft in which the mountain portion of this uneven portion is bitten into the inner peripheral surface of the shaft main body, the ridge portion of the mountain portion of the uneven portion is formed. A hollow movable shaft characterized in that it has a groove portion on its inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5099718A JPH06312323A (en) | 1993-04-26 | 1993-04-26 | Hollow movable shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5099718A JPH06312323A (en) | 1993-04-26 | 1993-04-26 | Hollow movable shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06312323A true JPH06312323A (en) | 1994-11-08 |
Family
ID=14254862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5099718A Pending JPH06312323A (en) | 1993-04-26 | 1993-04-26 | Hollow movable shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06312323A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140239707A1 (en) * | 2007-03-22 | 2014-08-28 | Ntn Corporation | Bearing device for a wheel |
| WO2018141612A1 (en) * | 2017-02-01 | 2018-08-09 | Thyssenkrupp Presta Teccenter Ag | Shaft-hub connection and method for creating a shaft-hub connection |
-
1993
- 1993-04-26 JP JP5099718A patent/JPH06312323A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140239707A1 (en) * | 2007-03-22 | 2014-08-28 | Ntn Corporation | Bearing device for a wheel |
| US20140239706A1 (en) * | 2007-03-22 | 2014-08-28 | Ntn Corporation | Bearing device for a wheel |
| US9039286B2 (en) * | 2007-03-22 | 2015-05-26 | Ntn Corporation | Bearing device for a wheel |
| US9321309B2 (en) | 2007-03-22 | 2016-04-26 | Ntn Corporation | Manufacturing method for a bearing device for a wheel |
| US9511629B2 (en) * | 2007-03-22 | 2016-12-06 | Ntn Corporation | Bearing device for a wheel |
| WO2018141612A1 (en) * | 2017-02-01 | 2018-08-09 | Thyssenkrupp Presta Teccenter Ag | Shaft-hub connection and method for creating a shaft-hub connection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20000704 |