JPS5836915Y2 - Transmission band tensioning device - Google Patents
Transmission band tensioning deviceInfo
- Publication number
- JPS5836915Y2 JPS5836915Y2 JP14012279U JP14012279U JPS5836915Y2 JP S5836915 Y2 JPS5836915 Y2 JP S5836915Y2 JP 14012279 U JP14012279 U JP 14012279U JP 14012279 U JP14012279 U JP 14012279U JP S5836915 Y2 JPS5836915 Y2 JP S5836915Y2
- Authority
- JP
- Japan
- Prior art keywords
- transmission band
- tensioner
- sliding arm
- tensioning device
- key
- 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
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
【考案の詳細な説明】
本考案はチェノ等の伝動帯の緊張装置に関するものであ
る。[Detailed Description of the Invention] The present invention relates to a tensioning device for a power transmission band such as a cheno.
一般に自動二輪車の駆動用エンジンのように、クランク
軸の回転を、チェノ伝動機構を介して動弁機構を作動す
るためのカム軸に伝達するようにしたものでは、伝動チ
ェノが弛緩しないようにチェノの緊張装置を設けて動力
伝達効率の向上、騒音の軽減、チェノの寿命延長等を図
るようにしているが、従来のこの種チエンの緊張装置は
手動により調整するようにしたので、手間がかふるばか
りでなく、その調整に熟練を要した。In general, in engines that transmit the rotation of the crankshaft to the camshaft that operates the valve mechanism through a chain drive mechanism, such as engines for driving motorcycles, the chain drive mechanism is designed to prevent the transmission chain from loosening. A tensioning device is installed to improve power transmission efficiency, reduce noise, and extend the life of the chain.However, the tensioning device for conventional chains of this type has to be adjusted manually, which is time-consuming. It took skill not only to swing it, but also to adjust it.
本考案は上記にがんがみかへる調整を自動的に確実に行
うことができるようにした、構成簡単な伝動帯の緊張装
置を得ることを目的とするものである。The object of the present invention is to provide a tensioning device for a transmission band with a simple structure, which can automatically and reliably perform the above-mentioned adjustment to ensure that the tension is exposed.
以下、図面により本考案緊張装置を自動二輪車用エンジ
ンに実施した場合の実施例について説明すると、エンジ
ンのクランク軸1に固着される駆動スプロケット2と、
そのカム軸3に固着される被動スプロケット4間には伝
動チェノ5が懸回されている。Hereinafter, an embodiment in which the tensioning device of the present invention is implemented in a motorcycle engine will be described with reference to the drawings.
A transmission chain 5 is suspended between driven sprockets 4 fixed to the camshaft 3.
前記伝動チェノ5の一側において、ケース本体6には該
伝動チェノ5の緊張装置Tが設けられる。On one side of the transmission chino 5, the case body 6 is provided with a tensioning device T of the transmission chino 5.
次にこの緊張装置Tの構造について詳細に説明すると、
前記ケース本体6には、数本の連結ボルト7により横断
面凹状のテンショナベース8が固着され、このテンショ
ナベース8内に案内路9が形成されている。Next, the structure of this tensioning device T will be explained in detail.
A tensioner base 8 having a concave cross section is fixed to the case body 6 by several connecting bolts 7, and a guide path 9 is formed within the tensioner base 8.
この案内路9には、横断面コ字状の細長い摺動アーム1
0がその長手方向(第1図矢印方向)に摺動自在に嵌合
されている。This guide path 9 includes a long and thin sliding arm 1 having a U-shaped cross section.
0 is fitted to be slidable in the longitudinal direction (in the direction of the arrow in FIG. 1).
この摺動アーム10は、テンショナベース8の中間部に
転勤自在に軸架されるガイドローラ11と、前記テンシ
ョナベース8の側壁より切起した舌片12とによってそ
の摺動が案内されろとともに案内路9から外れないよう
になっている。The sliding arm 10 is guided in its sliding motion by a guide roller 11 that is rotatably mounted on the middle part of the tensioner base 8 and by a tongue piece 12 cut and raised from the side wall of the tensioner base 8. It is designed not to deviate from Route 9.
テンショナベース8の一端と摺動アーム10の中間部間
には、テンショナばね13が張架され、このテンショナ
ばね13の引張力は、摺動アーム10を右方に牽引する
ように作用している。A tensioner spring 13 is stretched between one end of the tensioner base 8 and the intermediate portion of the sliding arm 10, and the tensile force of the tensioner spring 13 acts to pull the sliding arm 10 to the right. .
前記テンショナベース8の右方において、ケース本体6
には外方に凸の弓状に湾曲し得るテンショナ本体140
基端が連結ピン15によって回動可能に連結されており
、このテンショナ本体14の先端は、前記摺動アーム1
0の自由端に形成したホーク状支持部16にピン連結1
7されている。On the right side of the tensioner base 8, the case body 6
The tensioner body 140 can be curved into an outwardly convex arc.
The base end is rotatably connected by a connecting pin 15, and the tip of this tensioner body 14 is connected to the sliding arm 1.
Pin connection 1 to a fork-shaped support 16 formed on the free end of 0
7 has been done.
前記テンショナ本体14は帯状の基板18の外面に、ゴ
ム、合成樹脂材等よりなる弾性抑圧部材19が焼付など
により貼着して構成されている。The tensioner main body 14 is constructed by attaching an elastic suppressing member 19 made of rubber, synthetic resin, or the like to the outer surface of a band-shaped substrate 18 by baking or the like.
そしてこの弾性押圧部材19が伝動チェノ5の外面に圧
接される。This elastic pressing member 19 is pressed against the outer surface of the power transmission chino 5.
前記テンショナベース8の外端と摺動アーム10の外端
間には、その摺動アーム10の一方向の移動すなわち第
1図右方向への移動のみを許容する一方向ロツク機構り
が設けられる。A one-way locking mechanism is provided between the outer end of the tensioner base 8 and the outer end of the sliding arm 10, which allows the sliding arm 10 to move only in one direction, that is, to the right in FIG. .
以下、この機構りの構造を説明すると、前記テンショナ
ベース8の外端には、内面に外方に向って内向きに傾斜
する傾斜面21を形成した挿通孔20が形成されており
、この挿通孔20内に、摺動アーム10の支持部16に
ピン連結22されたキー23と、楔片24とが互いに重
合して嵌合され、前記楔片24に形成した楔面25が前
記傾斜面21に接合される。The structure of this mechanism will be explained below. An insertion hole 20 is formed at the outer end of the tensioner base 8, and the insertion hole 20 has an inclined surface 21 that slopes outward and inward on the inner surface. In the hole 20, a key 23 connected by a pin 22 to the support portion 16 of the sliding arm 10 and a wedge piece 24 are fitted in an overlapping manner, and a wedge surface 25 formed on the wedge piece 24 is fitted to the inclined surface. 21.
また前記キー23と楔片25との相対面する内面には、
ばね収容空間26が形成され、このばね収容空間26に
圧縮ばね27が収容され、この圧縮ばね27の一端は、
キー23に形成したばね受面28に係合され、またその
他端は楔片24に形成したばね受面29に係合されてお
り、この圧縮はね27の弾発力は楔片24を、テンショ
ナベース8の外方に突出するようにその楔合方向に偏倚
している。Further, on the inner surfaces facing each other between the key 23 and the wedge piece 25,
A spring accommodating space 26 is formed, a compression spring 27 is accommodated in this spring accommodating space 26, and one end of this compression spring 27 is
It is engaged with a spring receiving surface 28 formed on the key 23, and the other end is engaged with a spring receiving surface 29 formed on the wedge piece 24, and the elastic force of this compression spring 27 causes the wedge piece 24 to It is biased in the wedge direction so as to protrude outward from the tensioner base 8.
次に本考案の1実施例の作用について説明すると、摺動
アーム10はテンショナばね13の引張力により、その
ホーク状支持部16が右方に牽引されるので、これに連
結されるテンショナ本体14はこの牽引力により圧縮力
をうけて第1図に示すように弓なりに湾曲されて伝動チ
ェノ5の一側に圧接され、このチェノ5に一定の張力を
与えている。Next, the operation of one embodiment of the present invention will be explained. As the sliding arm 10 has its hawk-shaped support portion 16 pulled to the right by the tensile force of the tensioner spring 13, the tensioner body 14 connected thereto is compressed by this traction force and is bent into an arched shape as shown in FIG.
いま伝動チェノ5が伸びて弛むと、テンショナばね13
はその弛み分だげ摺動アーム10を右方に牽引してさら
にテンショナ本体14を伝動チェノ5に所定の張力を与
えるまで湾曲させるが、その際、摺動アーム10と一体
のキー23も内方(第1図右方)に移動する一方楔片2
4はその楔面25が圧縮ばね27の弾発力で、傾斜面2
1と衝合するまで、外方(第1図左方)に移動する。Now, when the power transmission chain 5 is stretched and loosened, the tensioner spring 13
pulls the sliding arm 10 to the right by the amount of slack and further bends the tensioner body 14 until it applies a predetermined tension to the transmission chain 5, but at this time, the key 23 integrated with the sliding arm 10 is also pulled inside. While the wedge piece 2 moves in the direction (rightward in Figure 1)
4, the wedge surface 25 is the elastic force of the compression spring 27, and the inclined surface 2
Move outward (to the left in Figure 1) until it collides with 1.
そしてキー23が一旦内方に移動すれば、楔片25の楔
作用により最早摺動アーム10は元の位置すなわち第1
図左方向に戻ることがない。Once the key 23 moves inward, the wedge action of the wedge piece 25 causes the sliding arm 10 to return to its original position, that is, the first position.
It does not return to the left direction in the figure.
以上のようにして伝動チェノ5が弛緩すると、その弛緩
に追従してテンショナ本体14は外方への湾曲度を増し
伝動チェノ5を所定の圧接力をもって圧接し、常に所定
の張力を附与することができる。When the power transmission chain 5 relaxes as described above, the tensioner main body 14 increases the degree of curvature outward in accordance with the relaxation, presses the power transmission chain 5 with a predetermined pressure, and always applies a predetermined tension. be able to.
また伝動チェノ機構の分解時のようにチェノ緊張を弛め
る必要が生じたときは楔片25を内方に押圧するとテン
ショナ本体14のロック状態を解除することができる。Further, when it is necessary to loosen the tension of the tensioner, such as when disassembling the power transmission mechanism, the tensioner body 14 can be released from the locked state by pressing the wedge piece 25 inward.
尚、上記実施例では伝動帯として伝動チェノ5を用いた
場合を説明したが、伝動ベルト等の他の伝動帯を使用で
きることは勿論である。Incidentally, in the above embodiment, a case has been described in which the power transmission chain 5 is used as the transmission band, but it goes without saying that other transmission bands such as a transmission belt can be used.
以上のように本考案によれば、伝動チェノ等の伝動帯が
弛緩すると一方向ロツク機構りが作動してテンショナ本
体14の湾曲度を自動的に増大させ、そのテンショナ本
体14を伝動帯の側面に圧接することができるので、伝
動帯に常に一定の張力を与えることができ、手動による
調整を一切必要とすることがないばかりでなく常に一定
の張力を与えることができ、動力伝達効率の向上、騒音
の軽減、伝動帯の寿命延長を図ることができ、特に一方
向ロツク機構りは、その楔片24を外側から内方に押す
だけでそのロック状態を解除することができ、緊張装置
全体のメンテナンスを簡単容易に行うことができる。As described above, according to the present invention, when the transmission band of a power transmission chain or the like is loosened, the one-way locking mechanism is activated to automatically increase the degree of curvature of the tensioner body 14, and the tensioner body 14 is attached to the side of the transmission band. Since it can be in pressure contact with the transmission band, it is possible to always apply a constant tension to the transmission band, and not only does it not require any manual adjustment, but also can always apply a constant tension, improving power transmission efficiency. In particular, the one-way locking mechanism can be unlocked by simply pushing the wedge piece 24 from the outside inward, reducing noise and extending the life of the transmission band. Maintenance can be performed easily and easily.
さらにロック機能をなす傾斜面21と楔片24楔合面は
広い面積に設定することができ、ロック作動を確実にす
ることができる。Furthermore, the engaging surfaces of the inclined surface 21 and the wedge piece 24, which perform the locking function, can be set to have a wide area, and the locking operation can be ensured.
第1図は本考案装置の縦断側面図、第2図はその平面図
、第3図は第1図■−■線断面図、第4図は第1図IV
−N線断面図、第5図は第1図V−V線断面図である。
L・・・・・・一方向ロツク機構、2・・・・・・駆動
輪としての駆動スプロケット、4・・・・・・被動輪と
しての被動スプロケット、5・・・・・・伝動帯として
の伝動チェノ、6・・・・・・ケース本体、8・・・・
・・テンショナベース、0・・・・・・摺動アーム、1
3・・・・・・テンショナはね、4・・・・・・テンシ
ョナ本体、20・・・・・・挿通孔、1・・・・・・傾
斜面、23・・・・・・キー、24・・・・・・楔片、
7・・・・・・ばね部材としての圧縮ばね。Fig. 1 is a vertical sectional side view of the device of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along the line ■-■ of Fig. 1, and Fig. 4 is Fig. 1 IV.
-N line sectional view, and FIG. 5 is a sectional view taken along line V-V in FIG. L: One-way lock mechanism, 2: Drive sprocket as a driving wheel, 4: Driven sprocket as a driven wheel, 5: As a transmission band Transmission chaino, 6... Case body, 8...
...Tensioner base, 0...Sliding arm, 1
3... Tensioner spring, 4... Tensioner body, 20... Insertion hole, 1... Inclined surface, 23... Key, 24...Wedge piece,
7... Compression spring as a spring member.
Claims (1)
伝動帯に所定の張力を附与するようにした伝動帯の緊張
装置において、前記伝動帯−側のケース本体6に固着さ
れるテンショナベース8と;該テンショナベース8に摺
動可能に設けられる摺動アーム10と;前記ケース本体
6と摺動アーム10とに両端を連結され弓状に湾曲され
て前記伝動帯に圧接されるテンショナ本体14と、前記
摺動アーム10とテンショナベース8間に張架され、前
記テンショナ本体14を伝動帯に向けて湾曲させるため
のテンショナばね13と:該テンショナばね13の偏倚
力により、前記テンショナ本体14が、前記伝動帯の弛
緩に追従するようにその湾曲度を増す方向へのみ自動的
に前記摺動アーム10を摺動させるための一方向ロツク
機構りと;よりなり、前記一方向ロック機構りは、前記
テンショナベース8の一端に形成した、内面に内向きに
傾斜面21を有する挿通孔20と、前記摺動アーム10
の一端に連結され前記挿通孔20内に挿通されるキー2
3と、前記挿通孔20内に挿入され前記キー23と内向
き傾斜面21間に挟入される楔片24と、この楔片24
を楔合方向に附勢するばね部材27とより構成したこと
を特徴とする伝動帯の緊張装置。In a transmission band tensioning device that is pressed against a transmission band suspended between a driving wheel and a driven wheel and applies a predetermined tension to the transmission band, a tensioning device is fixed to the case body 6 on the side of the transmission band. a tensioner base 8; a sliding arm 10 slidably provided on the tensioner base 8; both ends connected to the case body 6 and the sliding arm 10, curved in an arch shape, and pressed against the transmission band. a tensioner body 14, which is stretched between the sliding arm 10 and the tensioner base 8, and a tensioner spring 13 for bending the tensioner body 14 toward the transmission band; a one-way locking mechanism for automatically sliding the sliding arm 10 only in a direction in which the tensioner body 14 increases its degree of curvature so as to follow the loosening of the transmission band; The locking mechanism includes an insertion hole 20 formed at one end of the tensioner base 8 and having an inwardly inclined surface 21 on the inner surface, and the sliding arm 10.
A key 2 connected to one end of the key 2 and inserted into the insertion hole 20
3, a wedge piece 24 inserted into the insertion hole 20 and sandwiched between the key 23 and the inwardly inclined surface 21, and this wedge piece 24.
1. A tensioning device for a power transmission band, characterized in that it comprises a spring member 27 that urges the traction band in the wedging direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14012279U JPS5836915Y2 (en) | 1979-10-09 | 1979-10-09 | Transmission band tensioning device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14012279U JPS5836915Y2 (en) | 1979-10-09 | 1979-10-09 | Transmission band tensioning device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5656953U JPS5656953U (en) | 1981-05-16 |
JPS5836915Y2 true JPS5836915Y2 (en) | 1983-08-19 |
Family
ID=29371464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14012279U Expired JPS5836915Y2 (en) | 1979-10-09 | 1979-10-09 | Transmission band tensioning device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5836915Y2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5857015A (en) * | 1981-10-01 | 1983-04-05 | Honda Motor Co Ltd | Chain tensioner |
JP5226635B2 (en) * | 2009-09-16 | 2013-07-03 | 本田技研工業株式会社 | Chain tensioner for internal combustion engines |
-
1979
- 1979-10-09 JP JP14012279U patent/JPS5836915Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5656953U (en) | 1981-05-16 |
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