JP2006125463A - Cam follower mounting structure - Google Patents

Cam follower mounting structure Download PDF

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JP2006125463A
JP2006125463A JP2004312420A JP2004312420A JP2006125463A JP 2006125463 A JP2006125463 A JP 2006125463A JP 2004312420 A JP2004312420 A JP 2004312420A JP 2004312420 A JP2004312420 A JP 2004312420A JP 2006125463 A JP2006125463 A JP 2006125463A
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shaft
taper
stud
cam follower
fitting hole
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JP4683459B2 (en
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Ittetsu Kuroda
一徹 黒田
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Pascal Engineering Corp
パスカルエンジニアリング株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To improve the stud assembling accuracy, fixing strength, stability, durability, assembling efficiency, and maintenance of a cam follower with a stud, a needle bearing and an outer ring, as requested. <P>SOLUTION: The cam follower mounting structure comprises a following member having a taper fitting hole opening to the surface and a female screw hole ranging to the corner end of the taper fitting hole and the stud having a body shaft portion for bearing the outer ring. On the base of the stud, a fitted shaft portion and a male screw shaft portion are formed which is taper-fitted to the taper fitting hole and which integrally extends from the base end of the fitted shaft portion and is threaded to the female screw hole, respectively. The fitted shaft portion is formed with its diameter larger than that of the body shaft portion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、スタッドの基端側の軸部をカム機構の従動部材の嵌合穴に嵌合固定するようにしたカムフォロアの取り付け構造に関し、特にスタッドの嵌合軸部又はその相当部の構造を改良したものに関する。   The present invention relates to a cam follower mounting structure in which a shaft portion on the base end side of a stud is fitted and fixed in a fitting hole of a driven member of a cam mechanism, and in particular, a structure of a fitting shaft portion of a stud or a corresponding portion thereof. It relates to the improved one.

一般に、カム機構は、カム体のカム部の運動を従動部材に伝達する為に、カム部に摺接するローラ状のカムフォロアが従動部材に取り付けられる。カム機構は、種々の機械装置に組込まれているが、工作機械の割り出しテーブルの割り出し機構等にも採用されている。工作機械の割り出しテーブルは、割り出しテーブルにワークピースを取り付けた状態で、所定角度ずつ割り出しながら機械加工に供するものである。   Generally, in the cam mechanism, in order to transmit the motion of the cam portion of the cam body to the driven member, a roller-shaped cam follower that is in sliding contact with the cam portion is attached to the driven member. The cam mechanism is incorporated in various mechanical devices, but is also employed in an indexing mechanism for an indexing table of a machine tool. The indexing table of a machine tool is used for machining while indexing by a predetermined angle with a workpiece attached to the indexing table.

割り出し機構は、割り出しテーブルと同軸で一体回転するタレットと、タレットに円周等間隔に装備された複数のカムフォロアと、タレット軸と直交状で軸心が離間した回転カム軸に設けられたローラカムと、回転カム軸を回転駆動するカム駆動モータ等を備えている。所定角度ずつ割り出しながら機械加工を行うに際して、割り出し機構により割り出しテーブルを所定角度ずつ回転させるので、カムフォロアの組付け精度がワークピースの割り出し精度に大きな影響を与える。そこで、従来、種々の形態のカムフォロアの取り付け構造が開示されている。尚、一般にカムフォロアをメンテナンスする際に、カムフォロアを従動部材から取り外し、クリーニングしたりグリース充填したりする。   The indexing mechanism includes a turret that rotates coaxially and integrally with the indexing table, a plurality of cam followers mounted on the turret at equal circumferential intervals, and a roller cam provided on a rotating cam shaft that is orthogonal to the turret shaft and spaced apart from the center And a cam drive motor for rotating the rotary cam shaft. When performing machining while indexing by a predetermined angle, the indexing mechanism rotates the indexing table by a predetermined angle, so that the assembly accuracy of the cam follower greatly affects the indexing accuracy of the workpiece. Accordingly, various types of cam follower mounting structures have been disclosed. In general, when maintaining the cam follower, the cam follower is removed from the driven member and cleaned or filled with grease.

特許文献1には、スタッドとニードルベアリングと外輪と2つの側板と止め輪から構成されるカムフォロアが開示されている。スタッドは、外輪を支承する本体軸部と、この本体軸部よりも小径のストレートの嵌合軸部と、ネジ軸部とから構成され、従動部材にカムフォロアを組付ける際に、板状の従動部材に貫通形成した嵌合穴に嵌合軸部を圧入し、従動部材の裏面側においてネジ軸部にナットを締結することでカムフォロアを従動部材に固定する。   Patent Document 1 discloses a cam follower including a stud, a needle bearing, an outer ring, two side plates, and a retaining ring. The stud is composed of a main shaft portion that supports the outer ring, a straight fitting shaft portion having a smaller diameter than the main shaft portion, and a screw shaft portion. When the cam follower is assembled to the driven member, a plate-like driven member is provided. The cam follower is fixed to the driven member by press-fitting the fitting shaft portion into the fitting hole formed through the member and fastening the nut to the screw shaft portion on the back surface side of the driven member.

他方、特許文献2では、筒状のスタッドと、このスタッドに挿通する固定ボルトと、ニードルベアリングと、外輪とから構成されるカムフォロアの取り付け構造が開示されている。スタッドは、外輪を支承する本体軸部と、本体軸部と同径の嵌合軸部から構成されて固定ボルトにより従動部材に固定される。   On the other hand, Patent Document 2 discloses a cam follower mounting structure including a cylindrical stud, a fixing bolt inserted into the stud, a needle bearing, and an outer ring. The stud is composed of a main body shaft portion that supports the outer ring and a fitting shaft portion having the same diameter as the main body shaft portion, and is fixed to the driven member by a fixing bolt.

スタッドには、その軸心部分にスタッドを貫通させる固定ボルトの挿通孔が形成され、ニードルベアリングの基端側端面を受け止める為の支承軸部が設けられている。従動部材には、嵌合穴と、この嵌合穴の奥端に連なる雌ネジ穴とが形成され、従動部材にカムフォロアを組付ける際に、嵌合穴に嵌合軸部を圧入後、スタッドに形成された挿通孔から固定ボルトが挿通され、この固定ボルトを雌ネジ穴に螺合させて、スタッドを従動部材に固定する。
実開平7−10604号公報 特開2000−346174号公報
The stud has an insertion hole for a fixing bolt that penetrates the stud at the shaft center portion, and a support shaft portion for receiving the proximal end side end surface of the needle bearing. The driven member is formed with a fitting hole and a female screw hole connected to the inner end of the fitting hole. When the cam follower is assembled to the driven member, the fitting shaft is press-fitted into the fitting hole, and then the stud A fixing bolt is inserted through the insertion hole formed in the screw hole, and the fixing bolt is screwed into the female screw hole to fix the stud to the driven member.
Japanese Utility Model Publication No. 7-10604 JP 2000-346174 A

特許文献1のカムフォロアでは、嵌合軸部が小径であるため、カムフォロアを従動部材に組付けた場合のカムフォロアの安定性や耐久性が低下する。嵌合軸部が円筒状の軸であり、この嵌合軸部を従動部材の嵌合穴に密着状に嵌合させる関係上、スタッドの嵌合軸部を嵌合穴に組付ける組付け性を高めるのを容易ではない。しかし、嵌合軸部を嵌合穴にルーズに嵌合させる構造では、組付け精度が低下し、強度を高めにくく、安定性や耐久性を確保できない。   In the cam follower of Patent Document 1, since the fitting shaft portion has a small diameter, the stability and durability of the cam follower when the cam follower is assembled to the driven member is lowered. The fitting shaft part is a cylindrical shaft, and the fitting shaft part can be assembled in close contact with the fitting hole of the driven member. It is not easy to increase. However, in the structure in which the fitting shaft portion is loosely fitted into the fitting hole, the assembling accuracy is lowered, the strength is hardly increased, and stability and durability cannot be ensured.

特許文献2のカムフォロアの取り付け構造においても、スタッドが筒状であり、このスタッドを固定ボルトで固定するため、カムフォロアを従動部材に組付けた場合のカムフォロアの軸心直交方向の剛性が不足し、長期間の使用中にガタつきが生じ、カムフォロアの精度低下の原因となる。しかも、嵌合軸部が本体軸部と同径で小径であるため、取り付け強度を高めにくく、カムフォロアの安定性や耐久性を確保するのが難しい。   Also in the cam follower mounting structure of Patent Document 2, since the stud is cylindrical, and the stud is fixed with a fixing bolt, the rigidity of the cam follower in the direction perpendicular to the axial center when the cam follower is assembled to the driven member is insufficient. The backlash occurs during long-term use, causing a reduction in the accuracy of the cam follower. Moreover, since the fitting shaft portion has the same diameter as the main body shaft portion and a small diameter, it is difficult to increase the mounting strength, and it is difficult to ensure the stability and durability of the cam follower.

前記嵌合軸部を従動部材の嵌合穴に嵌合させることで、取付け強度の改善が図られている。この構造の場合、メンテナンスの際にカムフォロアを取り外す際に、固定ボルトを取り外すのは簡単であるが、スタッドを把持できる部位がないのでスタッドの嵌合軸部を嵌合穴から分離することが容易ではない。   The fitting strength is improved by fitting the fitting shaft portion into the fitting hole of the driven member. In this structure, when removing the cam follower during maintenance, it is easy to remove the fixing bolt, but there is no part that can hold the stud, so it is easy to separate the fitting shaft part of the stud from the fitting hole. is not.

特許文献2の図4,図5には、組付け性アップの為に、嵌合軸部をテーパ状に形成した例が開示されているが、嵌合軸部のテーパは約1/3の傾斜に形成されている。
この図4,図5に示すようなスタッドのテーパ軸部(嵌合軸部)が本体軸部と同程度に小径であるため、工作機械の把持具でスタッドの両端を把持した状態で、テーパ軸部を機械加工するのに多くの時間がかかる。
4 and 5 of Patent Document 2 disclose an example in which the fitting shaft portion is formed in a taper shape to improve the assemblability, but the fitting shaft portion has a taper of about 1/3. It is formed with an inclination.
The tapered shaft portion (fitting shaft portion) of the stud as shown in FIGS. 4 and 5 has a diameter as small as that of the main shaft portion. It takes a lot of time to machine the shaft.

本発明の目的は、カムフォロアの取り付け構造において、その組付け精度を高め、取り付け強度を高め、カムフォロアの安定性や耐久性を確保し、構造を簡単化し、簡単に組付け、取り外し可能にすること、等である。   The purpose of the present invention is to improve the mounting accuracy, increase the mounting strength, ensure the stability and durability of the cam follower, simplify the structure, and make it easy to mount and remove the cam follower mounting structure. , Etc.

請求項1のカムフォロアの取り付け構造は、スタッドとニードルベアリングと外輪とを備えたカムフォロアにおける、スタッドの基端側の一部をカム機構の従動部材の嵌合穴に嵌合固定するようにしたカムフォロアの取り付け構造において、前記従動部材に、その表面に開口すると共に奥側程小径化するテーパ嵌合穴と、このテーパ嵌合穴の奥端に連なる雌ネジ穴とが形成され、前記スタッドは外輪を支承する本体軸部を有し、スタッドの基部には、前記テーパ嵌合穴にテーパ嵌合されると共に前記本体軸部よりも大径の嵌合軸部と、この嵌合軸部の基端から一体的に延び前記雌ネジ穴に螺合される雄ネジ軸部とが形成されたことを特徴とする。   The cam follower mounting structure according to claim 1 is a cam follower including a stud, a needle bearing, and an outer ring, wherein a part of a proximal end side of the stud is fitted and fixed in a fitting hole of a driven member of the cam mechanism. In the mounting structure, the driven member is formed with a taper fitting hole that opens on the surface and decreases in diameter toward the back side, and a female screw hole that continues to the back end of the taper fitting hole. The stud base portion is taper-fitted into the taper fitting hole and has a diameter larger than that of the main body shaft portion, and a base of the fitting shaft portion. A male screw shaft portion extending integrally from the end and screwed into the female screw hole is formed.

カムフォロアを組付ける際に、雌ネジ穴に雄ネジ軸部を螺合させ、テーパ嵌合穴に嵌合軸部を嵌合させると、嵌合軸部がテーパ嵌合穴に圧入的に強固に嵌合させることができ、スタッドをテーパ嵌合穴に高精度に位置決めすることができる。前記嵌合軸部が本体軸部よりも大径に形成されるため、スタッドに軸心直交方向の剛性が高くなり、カムフォロアの安定性と耐久性が向上する。   When assembling the cam follower, if the male screw shaft is screwed into the female screw hole and the fitting shaft is fitted into the taper fitting hole, the fitting shaft is press-fitted into the taper fitting hole. The stud can be fitted, and the stud can be positioned in the tapered fitting hole with high accuracy. Since the fitting shaft portion is formed to have a larger diameter than the main body shaft portion, the rigidity of the stud in the direction orthogonal to the shaft center is increased, and the stability and durability of the cam follower is improved.

請求項2のカムフォロアの取り付け構造は、請求項1の発明において、前記嵌合軸部は、前記ニードルベアリングの基端側端部を受け止めると共にスタッドと一体のベアリング受部と、このベアリング受部よりも小径で雄ネジ軸部よりも大径の円筒軸部と、この円筒軸部に摺動自在に外嵌され且つテーパ嵌合穴にテーパ嵌合されるテーパリングとを有することを特徴とする。   The cam follower mounting structure according to a second aspect is the invention according to the first aspect, wherein the fitting shaft portion receives a base end side end portion of the needle bearing and a bearing receiving portion integral with the stud, and the bearing receiving portion. And a cylindrical shaft portion having a small diameter and a diameter larger than that of the male screw shaft portion, and a taper ring that is slidably fitted to the cylindrical shaft portion and is taper-fitted to the taper fitting hole. .

請求項3のカムフォロアの取り付け構造は、請求項1又は2の発明において、前記テーパ嵌合穴のテーパは、セルフロックが可能な傾斜に形成されたことを特徴とする。   According to a third aspect of the present invention, there is provided the cam follower mounting structure according to the first or second aspect, wherein the taper of the taper fitting hole is formed to have an inclination capable of self-locking.

請求項4のカムフォロアの取り付け構造は、スタッドとニードルベアリングと外輪とを備えたカムフォロアにおける、スタッドの基端側の一部をカム機構の従動部材の嵌合穴に嵌合固定するようにしたカムフォロアの取り付け構造において、前記従動部材に、その表面に開口する円筒状嵌合穴と、この円筒状嵌合穴の奥端に連なる雌ネジ穴とが形成され、前記スタッドは外輪を支承する本体軸部を有し、スタッドの基部には、前記円筒状嵌合穴よりも小径で基端側程小径化するテーパ軸部と、このテーパ軸部の基端から一体的に延び前記雌ネジ穴に螺合される雄ネジ軸部とが形成され、前記テーパ軸部には、前記本体軸部よりも大径の外径を有し且つ円筒状嵌合穴に内嵌されると共に内面がテーパ状の内面テーパリングが摺動自在に外嵌されたことを特徴とする。   The cam follower mounting structure according to claim 4 is a cam follower including a stud, a needle bearing, and an outer ring, wherein a part of a proximal end side of the stud is fitted and fixed in a fitting hole of a driven member of the cam mechanism. In the mounting structure, the driven member is formed with a cylindrical fitting hole opened on the surface thereof, and a female screw hole connected to the inner end of the cylindrical fitting hole, and the stud is a body shaft for supporting the outer ring. A tapered shaft portion having a diameter smaller than that of the cylindrical fitting hole and decreasing toward the proximal end side, and extending integrally from the proximal end of the tapered shaft portion to the female screw hole. A male screw shaft portion to be screwed is formed, and the taper shaft portion has an outer diameter larger than that of the main body shaft portion, and is fitted into a cylindrical fitting hole and has an inner surface tapered. The inner taper ring is slidably fitted outside It is characterized in.

カムフォロアを組付ける際に、スタッドのテーパ軸部に内面テーパリングを外嵌した状態で、雌ネジ穴に雄ネジ軸部を螺合させ、内面テーパリングを円筒状嵌合穴に嵌合させていくと、テーパ軸部が内面テーパリングに圧入的に強固に嵌合させることができ、スタッドを内面テーパリングを介して円筒状嵌合穴の軸心に高精度に位置決めすることができる。前記内面テーパリングを本体軸部よりも大径に形成するため、スタッドの軸心直交方向の剛性が高くなるため、カムフォロアの安定性と耐久性が向上する。   When assembling the cam follower, with the internal taper ring fitted onto the taper shaft part of the stud, the male screw shaft part is screwed into the female screw hole, and the internal taper ring is fitted into the cylindrical fitting hole. As a result, the taper shaft portion can be press-fitted firmly into the inner surface tapering, and the stud can be positioned with high accuracy on the axis of the cylindrical fitting hole via the inner surface tapering. Since the inner surface taper ring is formed to have a diameter larger than that of the main body shaft portion, the rigidity of the stud in the direction perpendicular to the axis is increased, so that the stability and durability of the cam follower is improved.

請求項5のカムフォロアの取り付け構造は、請求項4の発明において、前記テーパ軸部のテーパは、セルフロックが可能な傾斜に形成されたことを特徴とする。   According to a fifth aspect of the present invention, there is provided the cam follower mounting structure according to the fourth aspect, wherein the taper of the tapered shaft portion is formed to have an inclination capable of self-locking.

請求項1の発明によれば、嵌合軸部をテーパ嵌合穴に圧入状に強固に嵌合させることにより、カムフォロアを従動部材に強固に固定できる。スタッドをテーパ嵌合穴に高精度に位置決めすることにより、カムフォロアの従動部材への組付け精度を向上させることができる。カムフォロアの組付けのとき、テーパ嵌合穴に嵌合軸部を嵌めやすいため組付け性が向上する。   According to the first aspect of the present invention, the cam follower can be firmly fixed to the driven member by firmly fitting the fitting shaft portion into the taper fitting hole in a press-fit manner. The positioning accuracy of the cam follower to the driven member can be improved by positioning the stud in the taper fitting hole with high accuracy. When assembling the cam follower, it is easy to fit the fitting shaft portion into the tapered fitting hole, so that the assembling property is improved.

前記嵌合軸部が本体軸部よりも大径に形成されるため、スタッドの軸心直交方向の剛性が高くなり、安定性と耐久性が向上する。スタッドに、嵌合軸部と雄ネジ部を一体的に形成してあるため、カムフォロアの組付けが簡単であるうえ、スタッドを取り外す際には、雄ネジ部の締結を解除することにより、嵌合軸部を強制的にテーパ嵌合穴から離脱させることができるので、メンテナンスも容易に行うことができる。   Since the fitting shaft part is formed to have a larger diameter than the main body shaft part, the rigidity of the stud in the direction orthogonal to the axis is increased, and stability and durability are improved. Since the stud and the male screw part are integrally formed on the stud, the cam follower is easy to assemble, and when the stud is removed, the male screw part is released to release the fitting. Since the axial portion can be forcibly detached from the tapered fitting hole, maintenance can be easily performed.

請求項2の発明によれば、前記嵌合軸部は、ニードルベアリングの基端側端部を受け止めると共にスタッドと一体のベアリング受部と、このベアリング受部よりも小径で雄ネジ軸部よりも大径の円筒軸部と、この円筒軸部に摺動自在に外嵌され且つテーパ嵌合穴にテーパ嵌合されるテーパリングとを有するので、基本的に請求項1と同様の効果を奏する。 特に、スタッドと一体のベアリング受部によりニードルベアリングの基端側端部を受け止めることができる。   According to the invention of claim 2, the fitting shaft portion receives the proximal end side end portion of the needle bearing and has a bearing receiving portion integral with the stud, and has a smaller diameter than the bearing receiving portion and a male screw shaft portion. Since it has a large-diameter cylindrical shaft portion and a taper ring that is slidably fitted to the cylindrical shaft portion and is taper-fitted to the taper fitting hole, basically the same effect as in the first aspect can be obtained. . In particular, the proximal end of the needle bearing can be received by the bearing receiving portion integrated with the stud.

請求項3の発明によれば、前記テーパ嵌合穴のテーパの傾斜は、セルフロックが可能な約1/10に形成されたので、カムフォロアを組付けた状態で、カムフォロアを従動部材に固定する固定力を強化することができ、雄ネジ軸部が緩みを防止できる。   According to the invention of claim 3, since the taper inclination of the taper fitting hole is formed to be about 1/10 capable of self-locking, the cam follower is fixed to the driven member in a state where the cam follower is assembled. The fixing force can be strengthened, and the male screw shaft can prevent loosening.

請求項4の発明によれば、請求項1と同様に、テーパ軸部を円筒状嵌合穴に嵌合した内面テーパリングに圧入的に強固に嵌合させることにより、カムフォロアを従動部材に強固に組付けることができる。スタッドを円筒状嵌合穴に高精度に位置決めすることにより、カムフォロアを従動部材に高精度に位置決めすることができる。
前記内面テーパリングは本体軸部よりも大径に形成するため、スタッドの軸心直交方向の剛性が高めて、カムフォロアの安定性と耐久性を向上させることができる。また、請求項1と同様に、従動部材に対するカムフォロアの組付け、取り外しを簡単に行うことができる。
According to the invention of claim 4, as in the case of claim 1, the cam follower is firmly attached to the driven member by press-fitting and firmly fitting the tapered shaft portion to the inner surface tapered ring fitted in the cylindrical fitting hole. Can be assembled to. By positioning the stud in the cylindrical fitting hole with high accuracy, the cam follower can be positioned with high accuracy on the driven member.
Since the inner surface tapered ring is formed to have a larger diameter than the main body shaft portion, the rigidity of the stud in the direction perpendicular to the axial center can be increased, and the stability and durability of the cam follower can be improved. Further, similarly to the first aspect, the cam follower can be easily attached to and detached from the driven member.

請求項5の発明によれば、前記テーパ軸部のテーパは、セルフロックが可能な傾斜に形成されたので、カムフォロアを従動部材に固定する固定力を強化することができ、雄ネジ軸部の緩みを防止できる。   According to the invention of claim 5, since the taper of the taper shaft portion is formed to have an inclination capable of self-locking, the fixing force for fixing the cam follower to the driven member can be strengthened, and the male screw shaft portion Looseness can be prevented.

本願のカムフォロアの取り付け構造は、スタッドとニードルベアリングと外輪とを備えたカムフォロアにおける、スタッドの基端側の一部をカム機構の従動部材の嵌合穴に嵌合固定するものにおいて、前記従動部材に、その表面に開口すると共に奥側程小径化するテーパ嵌合穴と、このテーパ嵌合穴の奥端に連なる雌ネジ穴とが形成され、前記スタッドは前記外輪を支承する本体軸部を有し、スタッドの基部には、前記テーパ嵌合穴にテーパ嵌合されると共に本体軸部よりも大径の嵌合軸部と、この嵌合軸部の基端から一体的に延び前記雌ネジ穴に螺合される雄ネジ軸部とが形成されたことを特徴とするものである。   The cam follower mounting structure of the present application is a cam follower including a stud, a needle bearing, and an outer ring, in which a part of the base end side of the stud is fitted and fixed in the fitting hole of the driven member of the cam mechanism. In addition, a taper fitting hole that opens on the surface and decreases in diameter toward the back side and a female screw hole that continues to the back end of the taper fitting hole are formed, and the stud has a body shaft portion that supports the outer ring. A fitting shaft portion that is taper-fitted in the taper fitting hole and has a diameter larger than that of the main body shaft portion, and extends integrally from the base end of the fitting shaft portion. A male screw shaft portion to be screwed into the screw hole is formed.

本願の別のカムフォロアの取り付け構造は、前記と同様の前提構成を有するものにおいて、前記従動部材に、その表面に開口する円筒状嵌合穴と、この円筒状嵌合穴の奥端に連なる雌ネジ穴とが形成され、前記スタッドは前記外輪よりも大径の本体軸部を有し、スタッドの基部には、前記円筒状嵌合穴よりも小径で基端側程小径化するテーパ軸部と、このテーパ軸部の基端から一体的に延び前記雌ネジ穴に螺合される雄ネジ軸部とが形成され、前記テーパ軸部には、前記本体軸部よりも大径の外径を有し且つ円筒状嵌合穴に内嵌されると共に内面がテーパ状の内面テーパリングが摺動自在に外嵌されたことを特徴とするものである。   Another cam follower mounting structure of the present application has the same premise configuration as described above. The driven member has a cylindrical fitting hole opened on a surface thereof, and a female connected to the inner end of the cylindrical fitting hole. A threaded hole is formed, and the stud has a main body shaft portion having a diameter larger than that of the outer ring, and a taper shaft portion having a diameter smaller than that of the cylindrical fitting hole and decreasing toward the proximal end at the base portion of the stud. And a male screw shaft portion that integrally extends from the base end of the taper shaft portion and is screwed into the female screw hole, and the taper shaft portion has an outer diameter larger than that of the main body shaft portion. And an inner taper with a tapered inner surface is slidably fitted over the cylindrical fitting hole.

以下、本発明の実施例について図面に基づいて説明する。
図1〜図3に示すように、工作機械の割り出しテーブル装置Tは、割り出しテーブル1と、割り出し機構2などで構成され、割り出し機構2は、割り出しテーブル1と同軸で一体回転するタレット3と、タレット3の外周部に周方向に等間隔に装備された複数のローラ式カムフォロア4と、タレット軸と直交状で軸心が離間した回転カム軸5に設けられたローラカム6と、回転カム軸5を回転駆動するサーボモータ又はステッピングモータからなるカム駆動モータ7を備えている。カム機構は、タレット3(これが従動部材に相当する)と複数のカムフォロア4とローラカム6とで構成されている。
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 3, the indexing table device T of the machine tool includes an indexing table 1 and an indexing mechanism 2, and the indexing mechanism 2 is coaxial with the indexing table 1 and rotates together with the turret 3. A plurality of roller-type cam followers 4 mounted on the outer peripheral portion of the turret 3 at equal intervals in the circumferential direction, a roller cam 6 provided on a rotating cam shaft 5 orthogonal to the turret shaft and spaced apart from the center, and the rotating cam shaft 5 Is provided with a cam drive motor 7 comprising a servo motor or a stepping motor for rotating the motor. The cam mechanism includes a turret 3 (which corresponds to a driven member), a plurality of cam followers 4 and a roller cam 6.

この割り出しテーブル装置Tは、割り出しテーブル1にワークピースを取り付けた状態で、カム駆動モータ7により回転カム軸5とローラカム6を所定角度回転させると、複数のカムフォロア4のうちのローラカム6に係合しているカムフォロア4がタレット3の周方向へ駆動され、タレット3と割り出しテーブル1が一体的に前記所定角度に対応する設定角度だけ回転する。   This indexing table device T is engaged with the roller cam 6 of the plurality of cam followers 4 when the rotating cam shaft 5 and the roller cam 6 are rotated by a predetermined angle by the cam drive motor 7 with the workpiece attached to the indexing table 1. The cam follower 4 is driven in the circumferential direction of the turret 3, and the turret 3 and the indexing table 1 are integrally rotated by a set angle corresponding to the predetermined angle.

次に、ローラ式カムフォロア4の取り付け構造について説明する。
図4に示すように、カムフォロア4は、スタッド11と、ニードルベアリング12と、外輪13と、側板14と、止め輪15を備えている。タレット3には、その表面(周面)に開口すると共に奥側程小径化するテーパ嵌合穴16と、このテーパ嵌合穴16の奥端に連なる雌ネジ穴17(テーパ嵌合穴16よりも小径)とが形成されている。
Next, the attachment structure of the roller type cam follower 4 will be described.
As shown in FIG. 4, the cam follower 4 includes a stud 11, a needle bearing 12, an outer ring 13, a side plate 14, and a retaining ring 15. The turret 3 has a taper fitting hole 16 that opens on the surface (circumferential surface) and decreases in diameter toward the back side, and a female screw hole 17 (from the taper fitting hole 16 connected to the back end of the taper fitting hole 16). Also has a small diameter).

スタッド11は外輪13を支承する本体軸部11aを有し、スタッド11の基部には、タレット3のテーパ嵌合穴16に圧入的に嵌合される嵌合軸部19と、この嵌合軸部19の基端から一体的に延び雌ネジ穴17に螺合される雄ネジ軸部20とが形成されている。嵌合軸部19は本体軸部11aよりも大径に形成され、この嵌合軸部19はその基端側程小径化するようにテーパ状に形成され、この嵌合軸部19はニードルベアリング12の外周よりも大径に形成され、ニードルベアリング12の基端側端部12aを受け止めるように構成されている。スタッド11の外端部には、六角レンチを係合させる為の六角穴22が形成されている。   The stud 11 has a main body shaft portion 11 a that supports the outer ring 13. A fitting shaft portion 19 that is press-fitted into the taper fitting hole 16 of the turret 3 is fitted to the base portion of the stud 11, and the fitting shaft. A male screw shaft portion 20 that extends integrally from the base end of the portion 19 and is screwed into the female screw hole 17 is formed. The fitting shaft portion 19 is formed to have a larger diameter than the main body shaft portion 11a, and the fitting shaft portion 19 is formed in a tapered shape so as to have a smaller diameter toward the proximal end side. 12 is formed to have a larger diameter than the outer periphery of the needle 12, and is configured to receive the proximal end 12 a of the needle bearing 12. A hexagon hole 22 for engaging a hexagon wrench is formed at the outer end of the stud 11.

外輪13は、本体軸部11aの外周に、ニードルベアリング12を介して回転自在に支承されている。側板14は側板挿入部23に外嵌されて、ニードルベアリング12の外端部を受け止めている。スタッド11の外端側の周方向に形成された係止溝24には止め輪15が係合され、この止め輪15により、側板14は抜け止めされている。   The outer ring 13 is rotatably supported via the needle bearing 12 on the outer periphery of the main body shaft portion 11a. The side plate 14 is fitted on the side plate insertion portion 23 to receive the outer end portion of the needle bearing 12. A retaining ring 15 is engaged with a locking groove 24 formed in the circumferential direction on the outer end side of the stud 11, and the side plate 14 is prevented from coming off by the retaining ring 15.

テーパ嵌合穴16は、摩擦力でセルフロックが可能な約1/10以下の傾斜のテーパに形成されると共に、嵌合軸部19の軸方向の長さよりも深く形成されている。テーパ嵌合穴16に嵌合軸部19を嵌合させた状態において、テーパ嵌合穴16の底部26には隙間がある。   The taper fitting hole 16 is formed in a taper having an inclination of about 1/10 or less that can be self-locked by a frictional force, and is formed deeper than the axial length of the fitting shaft portion 19. In a state where the fitting shaft portion 19 is fitted in the taper fitting hole 16, there is a gap in the bottom portion 26 of the taper fitting hole 16.

次に、ローラ式カムフォロア4の取り付け構造の作用、効果について説明する。
カムフォロア4を組付ける際、六角レンチでスタッド11を回転させて、雌ネジ穴17に雄ネジ軸部20を螺合させていくと、テーパ嵌合穴16にスタッド11の嵌合軸部19が圧入的に微小な隙間も残さず嵌合される。こうして、嵌合軸部19をテーパ嵌合穴16に、精度よく位置決めして、簡単に強固に嵌合させることができ、カムフォロア4の安定性と耐久性が向上する。尚、嵌合軸部19やテーパ嵌合穴16の機械加工の寸法誤差により、固定状態におけるスタッド11の軸心方向位置がタレット3に対して相対的に一定位置になるとは限らない。
Next, the operation and effect of the mounting structure of the roller type cam follower 4 will be described.
When the cam follower 4 is assembled, when the stud 11 is rotated with a hexagon wrench and the male screw shaft portion 20 is screwed into the female screw hole 17, the fitting shaft portion 19 of the stud 11 is inserted into the taper fitting hole 16. The fitting is done without leaving any minute gaps. Thus, the fitting shaft portion 19 can be accurately positioned in the taper fitting hole 16 and can be easily and firmly fitted, and the stability and durability of the cam follower 4 is improved. Note that the axial direction position of the stud 11 in the fixed state is not always a constant position relative to the turret 3 due to a dimensional error in machining of the fitting shaft portion 19 and the taper fitting hole 16.

特に、嵌合軸部19を本体軸部11aよりも大径に、つまり極力大径に形成したため、固定状態におけるスタッド11の安定性が高まり、嵌合軸部19とテーパ嵌合穴16との摩擦接触面積も大きくなって、スタッド11をタレット3に固定する固定力を格段に強化することができる。スタッド11に本体軸部11aと嵌合軸部19と雄ネジ軸部20とを一体形成してあるため、カムフォロア4の組付けを簡単に行うことができるうえ、カムフォロア4をメンテナンスする際に、六角レンチでスタッド11を緩めることにより、嵌合軸部19をテーパ嵌合穴16から簡単に取り外すことができる。   In particular, since the fitting shaft portion 19 is formed to have a larger diameter than that of the main body shaft portion 11a, that is, as large as possible, the stability of the stud 11 in the fixed state is increased, and the fitting shaft portion 19 and the taper fitting hole 16 are formed. The frictional contact area is also increased, and the fixing force for fixing the stud 11 to the turret 3 can be remarkably enhanced. Since the main body shaft portion 11a, the fitting shaft portion 19 and the male screw shaft portion 20 are integrally formed on the stud 11, the cam follower 4 can be easily assembled, and when the cam follower 4 is maintained, By loosening the stud 11 with a hexagon wrench, the fitting shaft portion 19 can be easily removed from the taper fitting hole 16.

嵌合軸部19によりニードルベアリング12の基端側端部12aを受け止めるため、ニードルベアリング12を受け止める環状部材を省略でき、部品数を少なくすることができる。また、嵌合軸部19が本体軸部11aよりも太く形成されているため、スタッド11の嵌合軸部19を機械加工する際の能率を高めることができる。更に、テーパ状の嵌合軸部19が大径であるので、スタッド11の嵌合軸部19を機械加工するのが容易になり、能率的に機械加工できる。   Since the proximal end 12a of the needle bearing 12 is received by the fitting shaft portion 19, the annular member for receiving the needle bearing 12 can be omitted, and the number of parts can be reduced. Moreover, since the fitting shaft part 19 is formed thicker than the main body shaft part 11a, the efficiency at the time of machining the fitting shaft part 19 of the stud 11 can be improved. Furthermore, since the tapered fitting shaft portion 19 has a large diameter, the fitting shaft portion 19 of the stud 11 can be easily machined and can be efficiently machined.

次に、実施例2のローラ式カムフォロア4Aについて図5,図6に基づいて説明する。 但し、前記実施例1のカムフォロア4とと同一の構成には同一の符号を付し、主に異なる構成について説明する。図5に示すように、このローラ式カムフォロア4Aにおいては、スタッド11Aの嵌合軸部19Aの構成が前記の嵌合軸部19から変更されている。   Next, a roller-type cam follower 4A according to the second embodiment will be described with reference to FIGS. However, the same reference numerals are given to the same components as those of the cam follower 4 of the first embodiment, and different components will be mainly described. As shown in FIG. 5, in this roller type cam follower 4 </ b> A, the configuration of the fitting shaft portion 19 </ b> A of the stud 11 </ b> A is changed from the fitting shaft portion 19.

スタッド11Aの基部18Aに形成された嵌合軸部19Aは、鍔状のベアリング受部31と、円筒軸部32と、別体のテーパリング33とから構成されている。ベアリング受部31は、ニードルベアリング12の基端側端部を受け止め可能となるように、本体軸部11aよりも大径且つニードルベアリング12の外周よりも大径に形成され、ベアリング受部31はスタッド11Aと一体に形成されている。   The fitting shaft portion 19 </ b> A formed on the base portion 18 </ b> A of the stud 11 </ b> A includes a flange-shaped bearing receiving portion 31, a cylindrical shaft portion 32, and a separate taper ring 33. The bearing receiving portion 31 is formed to have a larger diameter than the main body shaft portion 11a and a larger diameter than the outer periphery of the needle bearing 12 so that the proximal end side end portion of the needle bearing 12 can be received. It is formed integrally with the stud 11A.

円筒軸部32は、ベアリング受部31よりも小径且つ雄ネジ軸部20よりも大径に形成されている。テーパリング33の外周面は、テーパ嵌合穴16にテーパ嵌合するテーパ状に形成され、テーパリング33の内周面は、円筒軸部32に外嵌する円筒面に形成されて、円筒軸部32に摺動自在に外嵌されている。尚、テーパリング33の上端は、ベアリング受部31の下面に当接している。テーパリング33の外周面のテーパは、摩擦力によりセルフロック可能な約1/10以下の傾斜に形成されている。図6に示すように、テーパリング33は、周方向の1カ所に2〜3mmの幅の分断スリット33aを有する環状体であり、径縮小側へと径拡大側へ弾性変形可能である。   The cylindrical shaft portion 32 has a smaller diameter than the bearing receiving portion 31 and a larger diameter than the male screw shaft portion 20. The outer peripheral surface of the taper ring 33 is formed in a taper shape that is taper-fitted into the taper fitting hole 16, and the inner peripheral surface of the taper ring 33 is formed in a cylindrical surface that is externally fitted to the cylindrical shaft portion 32, and the cylindrical shaft The part 32 is slidably fitted outside. The upper end of the taper ring 33 is in contact with the lower surface of the bearing receiving portion 31. The taper of the outer peripheral surface of the taper ring 33 is formed to have an inclination of about 1/10 or less that can be self-locked by a frictional force. As shown in FIG. 6, the taper ring 33 is an annular body having a dividing slit 33 a having a width of 2 to 3 mm at one place in the circumferential direction, and can be elastically deformed toward the diameter reduction side toward the diameter reduction side.

カムフォロア4Aを組付ける際には、円筒軸部32に装着したテーパリング33がテーパ嵌合穴16に圧入的にテーパ嵌合されて、テーパリング33をテーパ嵌合穴16に強固に嵌合固定することができ、カムフォロア4Aの組付け精度、安定性、耐久性を向上させ、確保できる。その他の構成、作用、効果については、前記実施例と同様である。   When the cam follower 4A is assembled, the taper ring 33 attached to the cylindrical shaft portion 32 is press-fitted into the taper fitting hole 16 and the taper ring 33 is firmly fitted and fixed to the taper fitting hole 16. It is possible to improve and secure the assembly accuracy, stability and durability of the cam follower 4A. Other configurations, operations, and effects are the same as those in the above embodiment.

次に、実施例3のローラ式カムフォロア4Bについて、図7に基づいて説明する。
但し、前記実施例1のカムフォロア4と同一の構成には同一の符号を付し、主に異なる構成についてのみ説明する。このカムフォロア4Bにおいては、タレット3の嵌合穴41の形状が変更され、嵌合穴41に嵌合させる軸部の構成が変更されている。
Next, the roller type cam follower 4B of Example 3 will be described with reference to FIG.
However, the same components as those of the cam follower 4 of the first embodiment are denoted by the same reference numerals, and only different components will be mainly described. In this cam follower 4B, the shape of the fitting hole 41 of the turret 3 is changed, and the configuration of the shaft portion to be fitted into the fitting hole 41 is changed.

タレット3には、その表面(周面)に開口する円筒状嵌合穴41と、この円筒状嵌合穴41の奥端に連なる雌ネジ穴17(円筒状嵌合穴41よりも小径)とが形成されている。 スタッド11Bは、外輪13を支承する本体軸部11aと、この本体軸部11aの基端側に一体形成されてニードルベアリング12の基端側端部12aを受け止めるベアリング受部11bとを有し、スタッド11Bの基部には、円筒状嵌合穴41よりも小径のテーパ軸部42と、このテーパ軸部42の基端から一体的に延び雌ネジ穴17に螺合される雄ネジ軸部20とが形成されている。   The turret 3 has a cylindrical fitting hole 41 opened on the surface (circumferential surface), and a female screw hole 17 (smaller diameter than the cylindrical fitting hole 41) connected to the inner end of the cylindrical fitting hole 41. Is formed. The stud 11B has a main body shaft portion 11a that supports the outer ring 13, and a bearing receiving portion 11b that is integrally formed on the proximal end side of the main body shaft portion 11a and receives the proximal end side end portion 12a of the needle bearing 12. A taper shaft portion 42 having a diameter smaller than that of the cylindrical fitting hole 41 and a male screw shaft portion 20 that integrally extends from the base end of the taper shaft portion 42 and is screwed into the female screw hole 17 at the base portion of the stud 11B. And are formed.

テーパ軸部42のテーパの傾斜は、セルフロックが可能な約1/10以下に形成されており、テーパ軸部42には、内面がテーパ状の内面テーパリング43が摺動自在に外嵌されている。内面テーパリング43は、本体軸部11aよりも大径の外径を有すると共にニードルベアリング12の外周よりも大径に形成されている。尚、内面テーパリング43の下端は、円筒状嵌合穴41の底面に当接している。   The taper slope of the taper shaft portion 42 is formed to be about 1/10 or less capable of self-locking, and an inner surface taper ring 43 whose inner surface is tapered is slidably fitted on the taper shaft portion 42. ing. The inner surface taper ring 43 has an outer diameter larger than that of the main body shaft portion 11 a and is formed larger than the outer periphery of the needle bearing 12. The lower end of the inner surface tapered ring 43 is in contact with the bottom surface of the cylindrical fitting hole 41.

カムフォロア4Bを組付ける際、雄ネジ軸部20を雌ネジ穴17に螺合させ、テーパ軸部42に装着された内面テーパリング43を円筒状嵌合穴41に圧入的に内嵌することにより、内面テーパリング43を円筒状嵌合穴41に、また、テーパ軸部42を内面テーパリング43のテーパ穴43aに、精度よく位置決めして強固に嵌合させることができ、カムフォロア4Bの組付け精度、安定性、耐久性を向上させ、確保できる。その他の構成、作用、効果については、前記実施例と同様である。   When assembling the cam follower 4B, the male screw shaft portion 20 is screwed into the female screw hole 17, and the inner surface taper ring 43 attached to the taper shaft portion 42 is press-fit into the cylindrical fitting hole 41. The inner taper ring 43 can be accurately positioned and securely fitted into the cylindrical fitting hole 41 and the tapered shaft portion 42 can be firmly fitted into the tapered hole 43a of the inner taper ring 43, and the cam follower 4B can be assembled. Accuracy, stability and durability can be improved and secured. Other configurations, operations, and effects are the same as those in the above embodiment.

次に、前記実施例を部分的に変更した変更例について説明する。
1)図5のカムフォロア4Aを部分的に変更した図8に示すカムフォロア4Cにおいては、ベアリング受部31Aが外輪13の外径よりも少し小径となる位の大径に形成されて、カムフォロア4Cをタレット3に組付けた状態ではベアリング受部31Aがタレット3の表面に当接して、スタッド11Aの軸心方向位置が決められる。テーパリング33の上端と、ベアリング受部31Aとの間に、環状の皿バネ34などの大きなバネ定数をもつ弾性体が設けられ、テーパリング33の抜け止め用の止め輪35も設けられている。上記のようなベアリング受部31Aと皿バネ34を設けることにより、前記図5のカムフォロア4Aの機能を確保しつつ、カムフォロア4Cの組付け状態におけるスタッド11Aのタレット3に対する軸心方向位置も一定位置に設定することが可能になる。
Next, a modified example in which the above embodiment is partially modified will be described.
1) In the cam follower 4C shown in FIG. 8 in which the cam follower 4A in FIG. 5 is partially changed, the bearing receiving portion 31A is formed to have a large diameter that is slightly smaller than the outer diameter of the outer ring 13, and the cam follower 4C is In the state assembled to the turret 3, the bearing receiving portion 31A comes into contact with the surface of the turret 3, and the axial direction position of the stud 11A is determined. An elastic body having a large spring constant such as an annular disc spring 34 is provided between the upper end of the taper ring 33 and the bearing receiving portion 31 </ b> A, and a retaining ring 35 for retaining the taper ring 33 is also provided. . By providing the bearing receiving portion 31A and the disc spring 34 as described above, the axial direction position of the stud 11A with respect to the turret 3 in the assembled state of the cam follower 4C is also a constant position while ensuring the function of the cam follower 4A of FIG. It becomes possible to set to.

2)図7のカムフォロア4Bを部分的に変更した図9に示すカムフォロア4Dにおいては、図8にカムフォロア4Cと同様に、スタッド11Bには、直径の大きなベアリング受部31Bが形成され、カムフォロア4Cをタレット3に組付けた状態ではベアリング受部31Bがタレット3の表面に当接して、スタッド11Aの軸心方向位置が決められる。
内面テーパリング43の下端と、円筒状嵌合穴41の底壁外周部との間に、環状の皿バネ44などの大きなバネ定数をもつ弾性体が設けられている。この皿バネ44を設けたため、前記図7のカムフォロア4Bの機能を確保しつつ、カムフォロア4Dの組付け状態におけるスタッド11Bのタレット3に対する軸心方向位置も一定位置に設定される。
2) In the cam follower 4D shown in FIG. 9 in which the cam follower 4B in FIG. 7 is partially changed, a bearing receiving portion 31B having a large diameter is formed on the stud 11B in the same manner as the cam follower 4C in FIG. In the state assembled to the turret 3, the bearing receiving portion 31B comes into contact with the surface of the turret 3, and the axial position of the stud 11A is determined.
An elastic body having a large spring constant such as an annular disc spring 44 is provided between the lower end of the inner tapered ring 43 and the bottom wall outer periphery of the cylindrical fitting hole 41. Since the disc spring 44 is provided, the axial center position of the stud 11B with respect to the turret 3 in the assembled state of the cam follower 4D is also set to a constant position while ensuring the function of the cam follower 4B of FIG.

3)前記実施例のテーパリング33,43は、環状の一体部品に限定されず、複数部品からなるコレットで構成してもよく、テーパリング33,43に拡大、縮径方向に弾性変形可能にするためのスリット等の構造は、周知の種々の構造を採用可能である。
4)その他、当業者であれば、テーパリング33,43の代わりに、内外両面を傾斜の異なるテーパ面に形成したテーパリング採用するなど、前記実施例に種々の変更を付加した形態で実施可能であり、本発明はそのような変更された種々の形態を包含するものである。
3) The taper rings 33 and 43 of the above-described embodiment are not limited to the annular integrated parts, but may be constituted by a collet composed of a plurality of parts. Various known structures can be adopted as the structure of the slits and the like.
4) In addition, those skilled in the art can implement the present invention with various modifications such as adopting a taper ring in which both the inner and outer surfaces are formed with different tapered surfaces instead of the taper rings 33 and 43. Therefore, the present invention includes various modified forms.

本発明の実施例1に係る割り出しテーブル装置の斜視図である。It is a perspective view of the index table apparatus concerning Example 1 of the present invention. 割り出しテーブルと割り出し機構の斜視図である。It is a perspective view of an indexing table and an indexing mechanism. 割り出しテーブルと割り出し機構の背面図である。It is a rear view of an indexing table and an indexing mechanism. ローラ式カムフォロアとその取り付け構造を示す断面図である。It is sectional drawing which shows a roller-type cam follower and its attachment structure. 実施例2の図4相当図である。FIG. 6 is a diagram corresponding to FIG. 4 of the second embodiment. 図5のカムフォロアのテーパリングの斜視図である。It is a perspective view of the taper ring of the cam follower of FIG. 実施例3のカムフォロアの図4相当図である。FIG. 5 is a view corresponding to FIG. 4 of the cam follower of Embodiment 3. 変更形態のカムフォロアの図5相当図である。FIG. 6 is a view corresponding to FIG. 5 of a modified cam follower. 変更形態のカムフォロアの図7相当図である。FIG. 8 is a view corresponding to FIG. 7 of a modified cam follower.

符号の説明Explanation of symbols

3 タレット
4,4A,4B,4C,4D ローラ式カムフォロア
6 ローラカム
11 スタッド
12 ニードルベアリング
13 外輪
16 テーパ嵌合穴
17 雌ネジ穴
19,19A 嵌合軸部
20 雄ネジ軸部
31 ベアリング軸部
32 円筒軸部
33 テーパリング
41 円筒状嵌合穴
42 テーパ軸部
43 内面テーパリング
3 Turrets 4, 4A, 4B, 4C, 4D Roller cam follower 6 Roller cam 11 Stud 12 Needle bearing 13 Outer ring 16 Taper fitting hole 17 Female screw hole 19, 19A Fitting shaft portion 20 Male screw shaft portion 31 Bearing shaft portion 32 Cylindrical Shaft portion 33 Taper ring 41 Cylindrical fitting hole 42 Tapered shaft portion 43 Inner surface tapering

Claims (5)

スタッドとニードルベアリングと外輪とを備えたカムフォロアにおける、スタッドの基端側の一部をカム機構の従動部材の嵌合穴に嵌合固定するようにしたカムフォロアの取り付け構造において、
前記従動部材に、その表面に開口すると共に奥側程小径化するテーパ嵌合穴と、このテーパ嵌合穴の奥端に連なる雌ネジ穴とが形成され、
前記スタッドは外輪を支承する本体軸部を有し、スタッドの基部には、前記テーパ嵌合穴にテーパ嵌合されると共に前記本体軸部よりも大径の嵌合軸部と、この嵌合軸部の基端から一体的に延び前記雌ネジ穴に螺合される雄ネジ軸部とが形成された、
ことを特徴とするカムフォロアの取り付け構造。
In the cam follower mounting structure in which a part of the base end side of the stud is fitted and fixed to the fitting hole of the driven member of the cam mechanism in the cam follower including the stud, the needle bearing, and the outer ring.
The driven member is formed with a taper fitting hole that opens on the surface thereof and decreases in diameter toward the back side, and a female screw hole that continues to the back end of the taper fitting hole.
The stud has a main body shaft portion that supports the outer ring, and a fitting shaft portion that is taper-fitted into the taper fitting hole and has a larger diameter than the main body shaft portion is fitted to the stud base portion. A male threaded shaft part that extends integrally from the base end of the shaft part and is screwed into the female threaded hole is formed.
A cam follower mounting structure characterized by this.
前記嵌合軸部は、前記ニードルベアリングの基端側端部を受け止めると共にスタッドと一体のベアリング受部と、このベアリング受部よりも小径で雄ネジ軸部よりも大径の円筒軸部と、この円筒軸部に摺動自在に外嵌され且つテーパ嵌合穴にテーパ嵌合されるテーパリングとを有することを特徴とする請求項1に記載のカムフォロアの取り付け構造。   The fitting shaft portion receives the proximal end side end portion of the needle bearing and a bearing receiving portion integral with the stud, a cylindrical shaft portion having a smaller diameter than the bearing receiving portion and a larger diameter than the male screw shaft portion, The cam follower mounting structure according to claim 1, further comprising a taper ring that is slidably fitted to the cylindrical shaft portion and is taper-fitted to the taper fitting hole. 前記テーパ嵌合穴のテーパは、セルフロックが可能な傾斜に形成されたことを特徴とする請求項1又は2に記載のカムフォロアの取り付け構造。   The cam follower mounting structure according to claim 1, wherein the taper of the taper fitting hole is formed to have an inclination capable of self-locking. スタッドとニードルベアリングと外輪とを備えたカムフォロアにおける、スタッドの基端側の一部をカム機構の従動部材の嵌合穴に嵌合固定するようにしたカムフォロアの取り付け構造において、
前記従動部材に、その表面に開口する円筒状嵌合穴と、この円筒状嵌合穴の奥端に連なる雌ネジ穴とが形成され、
前記スタッドは外輪を支承する本体軸部を有し、スタッドの基部には、前記円筒状嵌合穴よりも小径で基端側程小径化するテーパ軸部と、このテーパ軸部の基端から一体的に延び前記雌ネジ穴に螺合される雄ネジ軸部とが形成され、
前記テーパ軸部には、前記本体軸部よりも大径の外径を有し且つ円筒状嵌合穴に内嵌されると共に内面がテーパ状の内面テーパリングが摺動自在に外嵌されたことを特徴とするカムフォロアの取り付け構造。
In the cam follower mounting structure in which a part of the base end side of the stud is fitted and fixed to the fitting hole of the driven member of the cam mechanism in the cam follower including the stud, the needle bearing, and the outer ring.
The driven member is formed with a cylindrical fitting hole that opens on the surface thereof, and a female screw hole that continues to the inner end of the cylindrical fitting hole.
The stud has a main body shaft portion that supports the outer ring, and a base portion of the stud includes a tapered shaft portion having a smaller diameter than the cylindrical fitting hole and a diameter decreasing toward the proximal end side, and a proximal end of the tapered shaft portion. A male screw shaft portion that extends integrally and is screwed into the female screw hole;
The tapered shaft portion has an outer diameter larger than that of the main body shaft portion, and is fitted in a cylindrical fitting hole, and an inner surface tapered ring having a tapered inner surface is slidably fitted. A cam follower mounting structure characterized by this.
前記テーパ軸部のテーパは、セルフロックが可能な傾斜に形成されたことを特徴とする請求項4に記載のカムフォロアの取り付け構造。

The cam follower mounting structure according to claim 4, wherein the taper of the taper shaft portion is formed to have an inclination capable of self-locking.

JP2004312420A 2004-10-27 2004-10-27 Cam follower mounting structure Active JP4683459B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104271283A (en) * 2012-03-08 2015-01-07 贝瓦克生产机械有限公司 Cam follower arrangement
EP3591260A4 (en) * 2017-02-28 2020-10-21 Sankyo Seisakusho Co. Roller gear cam mechanism

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54176056U (en) * 1978-05-31 1979-12-12
JPS58217849A (en) * 1982-06-12 1983-12-17 Kazuo Fujita Roller screw
JPH03129123A (en) * 1989-08-31 1991-06-03 Behringwerke Ag Structural joint
JPH0842582A (en) * 1994-08-02 1996-02-13 Makino Milling Mach Co Ltd Fastening mechanism for shaft
JP2000346174A (en) * 1999-06-08 2000-12-12 Sankyo Mfg Co Ltd Mounting structure of cam follower

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54176056U (en) * 1978-05-31 1979-12-12
JPS58217849A (en) * 1982-06-12 1983-12-17 Kazuo Fujita Roller screw
JPH03129123A (en) * 1989-08-31 1991-06-03 Behringwerke Ag Structural joint
JPH0842582A (en) * 1994-08-02 1996-02-13 Makino Milling Mach Co Ltd Fastening mechanism for shaft
JP2000346174A (en) * 1999-06-08 2000-12-12 Sankyo Mfg Co Ltd Mounting structure of cam follower

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104271283A (en) * 2012-03-08 2015-01-07 贝瓦克生产机械有限公司 Cam follower arrangement
CN104271283B (en) * 2012-03-08 2016-09-14 贝瓦克生产机械有限公司 Cam follower arrangement
EP3591260A4 (en) * 2017-02-28 2020-10-21 Sankyo Seisakusho Co. Roller gear cam mechanism
US11215264B2 (en) 2017-02-28 2022-01-04 Sankyo Seisakusho Co. Roller gear cam mechanism

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