JPS6144026Y2 - - Google Patents
Info
- Publication number
- JPS6144026Y2 JPS6144026Y2 JP1473683U JP1473683U JPS6144026Y2 JP S6144026 Y2 JPS6144026 Y2 JP S6144026Y2 JP 1473683 U JP1473683 U JP 1473683U JP 1473683 U JP1473683 U JP 1473683U JP S6144026 Y2 JPS6144026 Y2 JP S6144026Y2
- Authority
- JP
- Japan
- Prior art keywords
- chain
- adjustment bolt
- pressing member
- fitting hole
- boss
- 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
Links
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
【考案の詳細な説明】
この考案は動力伝達用チエーンの緊張装置に関
するものである。[Detailed Description of the Invention] This invention relates to a tensioning device for a power transmission chain.
従来、チエーンの張力を調節する装置として、
チエーンが掛けられた両スプロケツトの間でチエ
ーンを所定方向に押圧し、チエーンの移動経路を
長くする装置が採用されてきた。この種の装置で
は、チエーンに接触し押圧力を伝達する押圧部材
をチエーンケースの外側に突出させたボルトで移
動させるように構成したものが一般的であるが、
張力調節用のボルトの締め具合を調節するのが難
しく、ことにチエーンがチエーンケース等に収納
されていて外部から見えない場合には、最適のチ
エーン張力を得るのは容易ではなかつた。 Conventionally, the following devices have been used to adjust the tension of chains:
A device has been adopted that presses the chain in a specific direction between the two sprockets on which the chain is hung, lengthening the path of the chain. In this type of device, the pressing member that contacts the chain and transmits the pressing force is generally configured to be moved by a bolt protruding outside the chain case.
It is difficult to adjust the tightness of the tension adjusting bolts, and it is not easy to obtain the optimum chain tension, especially when the chain is stored in a chain case or the like and cannot be seen from the outside.
本考案は、熟練を要することなく常に一定な最
適のチエーン張力を得ることができるようなチエ
ーン緊張装置を提供することを目的としている。
これについて以下に説明する。 The object of the present invention is to provide a chain tensioning device that can always obtain a constant optimum chain tension without requiring any skill.
This will be explained below.
この考案にかかる緊張装置は複数のスプロケツ
ト間に掛けられたチエーンに接触し、該チエーン
に所定方向の押圧力を伝える押圧部材と、該押圧
部材に設けられた嵌合孔に遊嵌するボスを先端部
にそなえた調節ボルト、および前記嵌合孔の内部
に保持され、嵌合孔に挿入された調節ボルトのボ
スを押し出す方向に付勢されたばねをそなえ、前
記嵌合孔の開口部には、断面非円形の係合凹部が
形成されるとともに、前記調節ボルトのボス付け
根部には、チエーンの張力および前記ばねの弾力
に抗して調節ボルトを押圧部材に押し込んだと
き、前記係合凹部に係合してボルトの回転を拘束
する断面非円形の係合部が形成されていることを
特徴している。 The tensioning device according to this invention includes a pressing member that contacts a chain placed between a plurality of sprockets and transmits a pressing force in a predetermined direction to the chain, and a boss that fits loosely into a fitting hole provided in the pressing member. The opening of the fitting hole is provided with an adjustment bolt provided at the tip thereof, and a spring held inside the fitting hole and biased in a direction to push out the boss of the adjustment bolt inserted into the fitting hole. , an engagement recess with a non-circular cross section is formed at the base of the boss of the adjustment bolt, and when the adjustment bolt is pushed into the pressing member against the tension of the chain and the elasticity of the spring, the engagement recess is formed. The bolt is characterized by being formed with an engaging portion having a non-circular cross section that engages with and restricts rotation of the bolt.
第１図ａ，ｂは本考案にかかる緊張装置の１例
をあらわす側面断面図、および正面断面図、およ
び第２図は要部の拡大図である。図においてチエ
ーンケース１の内部に設けた上下のスプロケツト
２，２′にチエーン３が掛けられている。チエー
ンケース１の側部には内外に通ずる支持筒４が固
着され、該支持筒４の外側端部にはナツト５が一
体に設けられている。支持筒４の内側端部には小
径部４ａが形成され、この部分に設けた環状の溝
４ｂにＯリング６が保持されている。 1A and 1B are a side sectional view and a front sectional view showing one example of the tensioning device according to the present invention, and FIG. 2 is an enlarged view of the main parts. In the figure, a chain 3 is hung on upper and lower sprockets 2, 2' provided inside a chain case 1. A support tube 4 communicating between the inside and the outside is fixed to the side of the chain case 1, and a nut 5 is integrally provided at the outer end of the support tube 4. A small diameter portion 4a is formed at the inner end of the support tube 4, and an O-ring 6 is held in an annular groove 4b provided in this portion.
支持筒４のナツト５には、調節ボルトが螺着さ
れている。調節ボルト１０は、ねじ部１０ａ、ス
トレート部１０ｂ、係合部１０ｃ、および小径の
ボス１０ｄをそなえ、ストレート部１０ｂは前記
支持筒４の小径部４ａ内を摺動するように形成さ
れている。また、調節ボルト１０の係合部１０ｃ
は、ストレート部１０ｂの外側部両側からボス１
０ｄの外径と同程度の厚さまで平板状に切り欠い
た形状に形成されている。調節ボルト１０には、
ロツクナツト１１が螺着されている。 An adjustment bolt is screwed into the nut 5 of the support tube 4. The adjustment bolt 10 includes a threaded portion 10a, a straight portion 10b, an engaging portion 10c, and a small-diameter boss 10d, and the straight portion 10b is formed to slide within the small-diameter portion 4a of the support tube 4. Further, the engaging portion 10c of the adjustment bolt 10
is the boss 1 from both sides of the outside part of the straight part 10b.
It is formed into a flat plate shape with a thickness approximately equal to the outer diameter of 0d. The adjustment bolt 10 has
A lock nut 11 is screwed on.
チエーンケース１の内部には、両端部に長穴１
２，１２′をそなえた押圧部材１３が設けられて
おり、該押圧部材は長穴１２，１２′に摺動自在
に嵌合するガイドピン１４，１４′によつて移動
可能に支持されている。押圧部材１３は、チエー
ン３側の端部１３ａがなめらかな円弧状に形成さ
れ、中央部にはつぼ状の嵌合部１５が形成されて
いる。嵌合部１５には、調節ボルト用の嵌合孔で
ある多段の凹部１６が穿設されており、この凹部
１６内にはコイルばね１７と該コイルばね１７に
嵌合する軸部１９ａをそなえたリベツト状の遊動
子１９が保持されている。凹部１６の入口部は、
前記調節ボルト１０の係合部１０ｃが係合する溝
状の係合凹部２０として形成され、該係合凹部１
６の奥の部分が断面円形の導入部２１として、ま
たそれよりも奥の部分が前記遊動子１９が摺動す
る小径の摺動部２２としてそれぞれ形成されてい
る。前記調節ボルト１０は、そのボス１０ｄの端
面が遊動子１９の頭部１９ｂ端面に当接するまで
押圧部材１３に嵌合した状態で保持されている。 Inside the chain case 1, there are long holes 1 at both ends.
2, 12' is provided, and the pressing member 13 is movably supported by guide pins 14, 14' which are slidably fitted into the elongated holes 12, 12'. . The end portion 13a of the pressing member 13 on the side of the chain 3 is formed into a smooth arc shape, and a pot-shaped fitting portion 15 is formed in the center portion. The fitting part 15 has a multi-stage recess 16 which is a fitting hole for an adjustment bolt, and a coil spring 17 and a shaft part 19a that fits into the coil spring 17 are provided in the recess 16. A rivet-like floater 19 is held. The entrance of the recess 16 is
It is formed as a groove-shaped engagement recess 20 into which the engagement portion 10c of the adjustment bolt 10 engages, and the engagement recess 1
6 is formed as an introduction part 21 having a circular cross section, and the part further back than that is formed as a small diameter sliding part 22 on which the above-mentioned floater 19 slides. The adjustment bolt 10 is held in a state where it is fitted into the pressing member 13 until the end surface of the boss 10d comes into contact with the end surface of the head 19b of the swinger 19.
つぎに、この緊張装置を用いてゆるんだチエー
ン３を緊張させるには、調節ボルト１０をチエー
ンケースの内側へねじ込めばよい。この操作によ
つてボス１０ｄが前進し、遊動子１９を押圧する
ので、コイルばね１７を介して押圧部材１３がチ
エーン３側に押し付けられ、チエーン３の移動経
路が湾曲してチエーンが緊張させられる。この状
態から調節ボルト１０をさらにねじ込むと、チエ
ーン３の張力による抵抗のため押圧部材１３が移
動せず、コイルばね１７が圧縮されるようにな
り、ついには調節ボルト１０の係合部１０ｃが係
合凹部２０に係合して、それ以上ボルトを回転さ
せることができなくなる。すなわち、チエーンや
ゆるんだときは調節ボルト１０を回らなくなるま
でねじ込んでゆくだけで、好ましい状態までチエ
ーンを緊張させることができるのである。コイル
ばね１７の強さは、チエーンの張力に応じて最適
なものを選べばよい。なお、図示例では、調節ボ
ルト１０とコイルばね１７の間に遊動子１９が介
装されているので、調節ボルト１０のねじ込みに
際してコイルばね１７にねじり力が加わらず、動
作をなめらかに保つことができる。また、支持筒
４の内側の小径部４ａに設けられた環状の溝４ｂ
にＯリング６が保持されているので、ロータリ耕
耘機等のチエーンケースに取り付けた場合でも
塵、泥水等のチエーンケース内への進入を阻止す
ることができる。 Next, in order to tension the loosened chain 3 using this tensioning device, the adjustment bolt 10 can be screwed into the inside of the chain case. By this operation, the boss 10d moves forward and presses the idler 19, so the pressing member 13 is pressed against the chain 3 via the coil spring 17, and the moving path of the chain 3 is curved, thereby tensioning the chain. . When the adjustment bolt 10 is further screwed in from this state, the pressing member 13 does not move due to resistance due to the tension of the chain 3, the coil spring 17 is compressed, and the engaging portion 10c of the adjustment bolt 10 is finally engaged. It engages with the mating recess 20 and becomes unable to rotate the bolt any further. That is, if the chain becomes loose, the chain can be tightened to the desired state by simply screwing in the adjusting bolt 10 until it no longer turns. The strength of the coil spring 17 may be selected optimally depending on the tension of the chain. In the illustrated example, since the idler 19 is interposed between the adjustment bolt 10 and the coil spring 17, no torsion force is applied to the coil spring 17 when the adjustment bolt 10 is screwed in, and smooth operation can be maintained. can. Further, an annular groove 4b provided in the small diameter portion 4a inside the support tube 4
Since the O-ring 6 is held in the chain case of a rotary cultivator or the like, it is possible to prevent dust, muddy water, etc. from entering the chain case.
以上に説明したように、この考案にかかる緊張
装置は、熟練を要さず、簡単な操作でゆるんだチ
エーンを常に一定の最適緊張状態まで緊張させる
ことのできる、実用性の高いものである。 As explained above, the tensioning device according to this invention is highly practical as it does not require any skill and can always tension a loosened chain to a constant optimum tension state with simple operation.
第１図ａ，ｂは本考案にかかる緊張装置の１例
をあらわす側面断面図、正面断面図、第２図は要
部の拡大図、第３図と第４図はそれぞれ調節ボル
トと押圧部材の要部の外観図である。
１……チエーンケース、２，２′……スプロケ
ツト、３……チエーン、６……Ｏリング、１０…
…調節ボルト、１１……ロツクナツト、１３……
押圧部材、１４，１４′……ガイドピン、１７…
…コイルばね、１９……遊動子。
1A and 1B are a side sectional view and a front sectional view showing an example of the tensioning device according to the present invention, FIG. 2 is an enlarged view of the main parts, and FIGS. 3 and 4 are the adjustment bolt and the pressing member, respectively. FIG. 1... Chain case, 2, 2'... Sprocket, 3... Chain, 6... O-ring, 10...
...Adjustment bolt, 11...Lock nut, 13...
Pressing member, 14, 14'... Guide pin, 17...
...Coil spring, 19...Floater.
Claims (1)
接触し、該チエーンに所定方向の押圧力を伝える
押圧部材と、該押圧部材に設けられた嵌合孔に遊
嵌するボスを先端部にそなえた調節ボルト、およ
び前記嵌合孔の内部に保持され、嵌合孔に挿入さ
れた調節ボルトのボスを押し出す方向に付勢され
たばねをそなえ、前記嵌合孔の開口部には、断面
非円形の係合凹部が形成されるとともに、前記調
節ボルトのボス付け根部には、チエーンの張力お
よび前記ばねの弾力に抗して調節ボルトを押圧部
材に押し込んだとき、前記係合凹部に係合してボ
ルトの回転を拘束する断面非円形の係合部が形成
されていることを特徴とするチエーンの緊張装
置。 A pressing member that contacts a chain placed between a plurality of sprockets and transmits a pressing force in a predetermined direction to the chain, and an adjustment bolt having a boss at its tip that loosely fits into a fitting hole provided in the pressing member. , and a spring held inside the fitting hole and biased in a direction to push out the boss of the adjustment bolt inserted into the fitting hole, and an engagement hole having a non-circular cross section in the opening of the fitting hole. A concave portion is formed at the base of the boss of the adjustment bolt, and when the adjustment bolt is pushed into the pressing member against the tension of the chain and the elasticity of the spring, the bolt engages with the engagement concave portion. A chain tensioning device characterized in that an engaging portion having a non-circular cross section is formed to restrain rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1473683U JPS59121547U (en) | 1983-02-02 | 1983-02-02 | chain tensioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1473683U JPS59121547U (en) | 1983-02-02 | 1983-02-02 | chain tensioning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59121547U JPS59121547U (en) | 1984-08-16 |
| JPS6144026Y2 true JPS6144026Y2 (en) | 1986-12-12 |
Family
ID=30146086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1473683U Granted JPS59121547U (en) | 1983-02-02 | 1983-02-02 | chain tensioning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59121547U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7378386B2 (en) * | 2020-12-25 | 2023-11-13 | 株式会社クボタ | grass mower |
-
1983
- 1983-02-02 JP JP1473683U patent/JPS59121547U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59121547U (en) | 1984-08-16 |
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