JPH0637220Y2 - Tensioner - Google Patents

Tensioner

Info

Publication number
JPH0637220Y2
JPH0637220Y2 JP12445488U JP12445488U JPH0637220Y2 JP H0637220 Y2 JPH0637220 Y2 JP H0637220Y2 JP 12445488 U JP12445488 U JP 12445488U JP 12445488 U JP12445488 U JP 12445488U JP H0637220 Y2 JPH0637220 Y2 JP H0637220Y2
Authority
JP
Japan
Prior art keywords
tensioner
boss portion
rolling bearing
bolt
cylindrical portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP12445488U
Other languages
Japanese (ja)
Other versions
JPH0246158U (en
Inventor
雅裕 箕輪
福光 北内
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koyo Seiko Co Ltd
Original Assignee
Koyo Seiko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koyo Seiko Co Ltd filed Critical Koyo Seiko Co Ltd
Priority to JP12445488U priority Critical patent/JPH0637220Y2/en
Publication of JPH0246158U publication Critical patent/JPH0246158U/ja
Application granted granted Critical
Publication of JPH0637220Y2 publication Critical patent/JPH0637220Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は、エンジンのバルブ駆動用ベルト伝動機構など
に用いられるテンショナに関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a tensioner used for a valve drive belt transmission mechanism of an engine and the like.

(従来の技術) 従来のこの種のテンショナとして、例えば第4図に示す
ように、原動プーリ1と従動プーリ2とに巻き掛けられ
たベルト3に対してテンショナ4を押し付けることによ
りベルト3に適度の張力を与え、その位置でテンショナ
4を固定する形式のものが知られている。
(Prior Art) As a conventional tensioner of this type, as shown in FIG. 4, for example, a tensioner 4 is pressed against a belt 3 wound around a driving pulley 1 and a driven pulley 2, so that the belt 3 can be appropriately adjusted. It is known that the tensioner 4 is applied and the tensioner 4 is fixed at that position.

この種のテンショナの具体例として、例えば、実開昭52
-71604号公報や、実開昭55-112145号公報で開示された
ものがある。
As a concrete example of this type of tensioner, for example, SAIKAI Sho 52
-71604 and Japanese Utility Model Laid-Open No. 55-112145.

前者公報の構造は、第5図に示すように、エンジン本体
などのベース5に支点ピン6を介して一端を揺動自在に
枢着した揺動アーム7の他端に有底円筒状のボス部8を
突設し、このボス部8にベルトに転接させられるプーリ
を構成する転がり軸受9を外嵌圧入して止着するととも
に、ボス部8の外端面に前記支点ピン6を曲率中心とす
る部分円弧状の長孔10を形成し、この長孔10に外方より
挿通したボルト11をベース5に締着することで、揺動ア
ーム7を任意の揺動調節位置で締付け固定できるよう構
成している。
As shown in FIG. 5, the structure of the former publication has a cylindrical boss with a bottom at the other end of a swing arm 7 whose one end is swingably attached to a base 5 such as an engine body via a fulcrum pin 6. The boss 8 is provided in a protruding manner, and a rolling bearing 9 constituting a pulley to be brought into rolling contact with the belt is externally press-fitted to the boss 8 to fix the same, and the fulcrum pin 6 is attached to the outer end surface of the boss 8 as a center of curvature. By forming an elongated hole 10 having a partial arc shape, and tightening a bolt 11 inserted from the outside into this elongated hole 10 to the base 5, the swing arm 7 can be fixed by tightening at any swing adjusting position. Is configured as follows.

また、後者公報の構造は、第6図に示すように、一端が
支点ピン6に揺動自在に枢着された揺動アーム7の他端
に円筒状のボス部8を突設して、このボス部8に転がり
軸受9を外嵌圧入するとともに、ボルト11を挿通する円
弧状長孔11を有する蓋体12の輪状フランジ12aを転がり
軸受9に内輪9aへ内嵌し、前例と同様に揺動アーム7を
任意の揺動調節位置にボルト11で締着固定するよう構成
している。
Further, in the structure of the latter publication, as shown in FIG. 6, a cylindrical boss portion 8 is projectingly provided at the other end of a swinging arm 7 whose one end is swingably attached to a fulcrum pin 6. The rolling bearing 9 is externally press-fitted into the boss portion 8 and the ring-shaped flange 12a of the lid 12 having the arcuate elongated hole 11 into which the bolt 11 is inserted is fitted into the rolling bearing 9 to the inner ring 9a. The swing arm 7 is configured so as to be fastened and fixed with a bolt 11 at an arbitrary swing adjustment position.

(考案が解決しようとする課題) しかしながら、上記各従来例ではそれぞれ次のような不
都合がある。
(Problems to be Solved by the Invention) However, each of the above conventional examples has the following disadvantages.

まず、第5図に示す従来構造にあっては、転がり軸受9
を外嵌支持した有底筒状のボス部8自体の外端面に長孔
11を形成しているので、ボス部全体の周方向における剛
性分布が不均一となっており、このために、転がり軸受
9をボス部8に外嵌圧入した際に、内輪9aの真円度が崩
れて転がり軸受9の焼付けや振動騒音が発生しやすくな
るといった不都合が指摘される。
First, in the conventional structure shown in FIG. 5, the rolling bearing 9
A long hole is formed in the outer end surface of the bottomed cylindrical boss portion 8 itself supporting and fitting the
Since 11 is formed, the rigidity distribution in the circumferential direction of the entire boss portion is non-uniform. For this reason, when the rolling bearing 9 is externally press-fitted into the boss portion 8, the circularity of the inner ring 9a is rounded. It is pointed out that the rolling bearing 9 is easily broken and vibration noise is easily generated.

一方、第6図の従来構造は、周方向剛性分布が均一な円
筒状のボス部8に転がり軸受9の大部分を外嵌支持させ
るので、ボス部8への軸受圧入により、内輪9aの真円度
がくずれることはないが、転がり軸受9を前記ボス部8
の外周の一部と蓋体12の輪状フランジ12aとにまたがせ
て支えているために、蓋体12を締付けた際に発生する蓋
体12自体の不均一な歪みが内輪9aに伝わって、内輪9aの
真円度がくずれるおそれがあり、前記同様の不都合を招
く結果となる。
On the other hand, in the conventional structure shown in FIG. 6, most of the rolling bearing 9 is externally fitted and supported by the cylindrical boss portion 8 having a uniform circumferential rigidity distribution. Although the circularity is not lost, the rolling bearing 9 is attached to the boss 8
Since it is supported by straddling a part of the outer circumference of the cover 12 and the ring-shaped flange 12a of the cover 12, uneven strain of the cover 12 itself generated when the cover 12 is tightened is transmitted to the inner ring 9a. However, the circularity of the inner ring 9a may be broken, resulting in the same inconvenience as described above.

本考案は、揺動アームに設ける軸受支持用のボス部に改
良を加えることで、従来構造にみられる上記不具合を解
消することを目的としている。
An object of the present invention is to eliminate the above-mentioned problems found in the conventional structure by improving the boss portion for supporting the bearing provided on the swing arm.

(課題を解決するための手段) 上記目的を達成するために、本考案は、次のように構成
した。
(Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows.

本考案にかかるテンショナは、一端をベースに揺動自在
に枢支した揺動アームの他端にボス部を突設し、このボ
ス部に転がり軸受を圧入外嵌し、ボス部の外端面に設け
た長孔を通して外方より挿入したボルトをベースに締着
して、揺動アームを任意の揺動位置で締付け固定するよ
う構成したものであって、 前記ボス部が、転がり軸受の内輪を外嵌支持する円筒部
と、この円筒部の外端に接合される蓋体とで構成され、
この蓋体にボルト挿通用の前記長孔が形成されていると
ともに、円筒部と蓋体とが相対回動不能に係合連結され
ていることに特徴を有する。
In the tensioner according to the present invention, a boss portion is projectingly provided on the other end of a swing arm pivotally supported on one end by a base, and a rolling bearing is press-fitted and fitted onto the boss portion, and the outer end surface of the boss portion is fitted. It is configured such that a bolt inserted from the outside through a provided long hole is fastened to a base, and the swing arm is fastened and fixed at an arbitrary swing position, wherein the boss portion fixes the inner ring of the rolling bearing. It is configured by a cylindrical portion that is fitted and supported externally, and a lid body that is joined to the outer end of the cylindrical portion,
The cover is formed with the elongated hole for inserting a bolt, and the cylindrical portion and the cover are engaged and connected so as not to rotate relative to each other.

(作用) 上記構成によると、転がり軸受は周方向の剛性分布が均
一な円筒部に外嵌支持されるので、圧入時に軸受内輪の
真円度がくずれることはない。
(Operation) According to the above configuration, since the rolling bearing is externally fitted and supported by the cylindrical portion having the uniform rigidity distribution in the circumferential direction, the circularity of the bearing inner ring does not collapse during press fitting.

そして、ボルトの締着力を受ける蓋体は円筒部の端部に
相対回動不能に係合状態で接合支持させてあるために、
仮に、蓋体がボルト締着によって歪んでも、この歪みが
軸受内輪に伝わることがなく、ボルト締着による内輪の
真円度のくずれもない。
Since the lid that receives the tightening force of the bolt is joined to and supported by the end of the cylindrical portion in a relatively non-rotatable engagement state,
Even if the lid body is distorted by tightening the bolts, this distortion is not transmitted to the inner ring of the bearing, and the roundness of the inner ring is not broken by the tightening of the bolts.

(実施例) 以下、本考案の一実施例を図面に示して詳細に説明す
る。
Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

第1図ないし第3図に本考案の一実施例にかかるテンシ
ョナを示している。
1 to 3 show a tensioner according to an embodiment of the present invention.

図例のテンショナAは、ベース20の側面に打ち込んだ支
点ピン21に一端が揺動自在に枢支された板金製の揺動ア
ーム30と、この揺動アーム30の他端の孔31に取り付けら
れたボス部32に外嵌圧入される転がり軸受40と、この転
がり軸受40に外嵌止着されるプーリ50と、揺動アーム30
の孔31近傍に突設した突片33とベース20との間に張設さ
れる補助テンション用のコイルバネ51と、ボス部32の外
端から挿入されてベース20に締着されるボルト52とを備
えている。
The tensioner A in the illustrated example is attached to a swing arm 30 made of a metal plate, one end of which is swingably supported by a fulcrum pin 21 driven into the side surface of the base 20, and a hole 31 at the other end of the swing arm 30. A rolling bearing 40 that is externally fitted and press-fitted into the formed boss portion 32, a pulley 50 that is externally fitted and fixed to the rolling bearing 40, and a swing arm 30.
A coil spring 51 for auxiliary tension that is stretched between the projecting piece 33 projecting in the vicinity of the hole 31 and the base 20, and a bolt 52 that is inserted from the outer end of the boss portion 32 and fastened to the base 20. Is equipped with.

前記ボス部32は、揺動アーム30の孔31周縁に形成された
輪状片34に突出状に圧入固定された円筒部32aと、円筒
部32aの外方開口端に結合される蓋体32bとからなる。こ
の円筒部32a上に前記転がり軸受40が外嵌圧入される。
蓋体32bは段付き円板状に構成されたもので、その厚肉
部が円筒部32aの外方開口端に内嵌接合され、この蓋体3
2bの薄肉部によって軸受内輪41の外方への抜止めがなさ
れる。
The boss portion 32 includes a cylindrical portion 32a press-fitted and fixed to a ring-shaped piece 34 formed on the periphery of the hole 31 of the swing arm 30, and a lid body 32b coupled to the outer open end of the cylindrical portion 32a. Consists of. The rolling bearing 40 is externally fitted and press-fitted onto the cylindrical portion 32a.
The lid 32b is formed in the shape of a stepped disc, and its thick portion is internally fitted and joined to the outer opening end of the cylindrical portion 32a.
The thin portion 2b prevents the bearing inner ring 41 from being pulled out.

そして、円筒部32aの対角位置に形成した径方向の内外
に開放する一対の切欠き凹部35に、蓋体32bの段差部に
打ち込み突設した一対のピン36を係入させて、円筒部32
aと蓋体32bとの相対回動を阻止するとともに、支点ピン
21を曲率中心とする部分円弧状の長孔37を蓋体32bに形
成して、ここに前記ボルト52を挿通するよう構成されて
いる。
Then, a pair of notched recesses 35 formed at diagonal positions of the cylindrical portion 32a and opened to the inside and outside in the radial direction are engaged with a pair of pins 36 projecting from the stepped portion of the lid body 32b to form a cylindrical portion. 32
Prevents relative rotation between a and the lid 32b, and supports the fulcrum pin.
A partial arcuate elongated hole 37 having a center of curvature 21 is formed in the lid 32b, and the bolt 52 is inserted therein.

本考案のテンショナAは以上のように構成されたもので
あり、テンション調節にあたってはボルト52を少しゆる
めておき、揺動アーム30を適当に動かすことにより図示
しないベルトを適当な張力にし、この位置でボルト52を
締め直すのである。この際、揺動アーム30に形成した角
孔38に適当な工具を差し込んで揺動アーム30の位置調節
を行えるようになっている。また、ボルト52をゆるめて
も、補助テンション用コイルバネ51が付いているので、
揺動アーム30が勝手に後退揺動することはない。
The tensioner A of the present invention is constructed as described above. When adjusting the tension, the bolt 52 is slightly loosened, and the swing arm 30 is appropriately moved to bring the belt (not shown) to an appropriate tension. Then tighten bolt 52 again. At this time, the position of the swing arm 30 can be adjusted by inserting an appropriate tool into the square hole 38 formed in the swing arm 30. Even if the bolt 52 is loosened, the coil spring 51 for auxiliary tension is attached, so
The swing arm 30 does not swing backward freely.

(考案の効果) 以上説明したように、本考案によるテンショナは、揺動
アームに設けた軸受支持用のボス部を、周方向剛性分布
が均一な円筒部とこれの外方開口端に係合連結される蓋
体とで構成して、円筒部に転がり軸受を外嵌圧入し、蓋
体にボルト挿通用の長孔を設けたので、円筒部への軸受
外嵌圧入による軸受内輪の真円度の崩れがなく、かつ、
長孔によって周方向剛性分布が不均一を余儀なくされて
いる蓋体に歪みが仮に発生しても、円筒部がその影響で
歪むことはなく、揺動アームのボルト締め作用によっ
て、軸受内輪の真円度がくずれることもなく、焼き付け
等のトラブルを確実に防止することができるようになっ
た。
(Effects of the Invention) As described above, in the tensioner according to the present invention, the boss portion for supporting the bearing provided on the swing arm is engaged with the cylindrical portion having a uniform circumferential rigidity distribution and the outer open end thereof. Since the rolling bearing is externally press-fitted to the cylindrical part and the long hole for bolt insertion is provided in the cylindrical part, it is composed of a lid to be connected. There is no change in degree, and
Even if distortion occurs in the lid, which has a non-uniform circumferential rigidity distribution due to the long holes, the cylindrical part will not be distorted due to the effect, and the bolt tightening action of the swing arm will prevent the inner ring of the bearing from ringing. It is possible to prevent problems such as burning without failing to keep the roundness.

【図面の簡単な説明】[Brief description of drawings]

第1図ないし第3図は本考案の一実施例にかかり、第1
図は第2図のI-I線矢視断面図、第2図はテンショナの
平面図、第3図はテンショナの分解斜視図である。 第4図はテンショナの使用状態を示す平面図である。ま
た、第5図および第6図はそれぞれ従来例のテンショナ
を示す縦断側面図である。 20…ベース、21…支点ピン、 30…揺動アーム、32…ボス部、 32a…円筒部、32b…蓋体、 50…転がり軸受、51…内輪、 52…ボルト、37…長孔。
1 to 3 show an embodiment of the present invention.
2 is a sectional view taken along the line II in FIG. 2, FIG. 2 is a plan view of the tensioner, and FIG. 3 is an exploded perspective view of the tensioner. FIG. 4 is a plan view showing a usage state of the tensioner. Further, FIG. 5 and FIG. 6 are vertical side views showing a conventional tensioner. 20 ... Base, 21 ... Support pin, 30 ... Oscillating arm, 32 ... Boss part, 32a ... Cylindrical part, 32b ... Lid, 50 ... Rolling bearing, 51 ... Inner ring, 52 ... Bolt, 37 ... Oblong hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】一端をベースに揺動自在に枢支した揺動ア
ームの他端にボス部を突設し、このボス部に転がり軸受
を圧入外嵌し、ボス部の外端面に設けた長孔を通して外
方より挿入したボルトをベースに締着して、揺動アーム
を任意の揺動位置で締付け固定するよう構成したテンシ
ョナにおいて、 前記ボス部が、転がり軸受の内輪を外嵌支持する円筒部
と、この円筒部の外端に接合される蓋体とで構成され、
この蓋体にボルト挿通用の前記長孔が形成されていると
ともに、円筒部と蓋体とが相対回動不能に係合連結され
ていることを特徴とするテンショナ。
1. A boss portion is projectingly provided on the other end of a swing arm pivotally supported on one end by a base, and a rolling bearing is press-fitted onto the boss portion and provided on an outer end surface of the boss portion. In a tensioner configured such that a bolt inserted from the outside through a long hole is fastened to a base to fasten and fix an oscillating arm at an arbitrary oscillating position, the boss portion externally supports an inner ring of a rolling bearing. It is composed of a cylindrical portion and a lid body joined to the outer end of the cylindrical portion,
The tensioner is characterized in that the long hole for inserting a bolt is formed in the lid body, and the cylindrical portion and the lid body are engaged and coupled with each other so as not to rotate relative to each other.
JP12445488U 1988-09-22 1988-09-22 Tensioner Expired - Lifetime JPH0637220Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12445488U JPH0637220Y2 (en) 1988-09-22 1988-09-22 Tensioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12445488U JPH0637220Y2 (en) 1988-09-22 1988-09-22 Tensioner

Publications (2)

Publication Number Publication Date
JPH0246158U JPH0246158U (en) 1990-03-29
JPH0637220Y2 true JPH0637220Y2 (en) 1994-09-28

Family

ID=31374201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12445488U Expired - Lifetime JPH0637220Y2 (en) 1988-09-22 1988-09-22 Tensioner

Country Status (1)

Country Link
JP (1) JPH0637220Y2 (en)

Also Published As

Publication number Publication date
JPH0246158U (en) 1990-03-29

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