JPS62188826A - Over-loading preventive centrifugal clutch - Google Patents
Over-loading preventive centrifugal clutchInfo
- Publication number
- JPS62188826A JPS62188826A JP61028197A JP2819786A JPS62188826A JP S62188826 A JPS62188826 A JP S62188826A JP 61028197 A JP61028197 A JP 61028197A JP 2819786 A JP2819786 A JP 2819786A JP S62188826 A JPS62188826 A JP S62188826A
- Authority
- JP
- Japan
- Prior art keywords
- driven shaft
- outer ring
- shaft
- centrifugal clutch
- shoe
- 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.)
- Granted
Links
- 230000003449 preventive effect Effects 0.000 title 1
- 230000002265 prevention Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000013021 overheating Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000013138 pruning Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
- F16D43/14—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members
- F16D43/18—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members with friction clutching members
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は過負荷防止遠心クラッチに関する。[Detailed description of the invention] Industrial applications The present invention relates to an anti-overload centrifugal clutch.
従来の技術
一般に遠心クラッチは、その従動部に過負荷が作用する
と、従動部と駆動部との回転数が相違して外環とシュー
との間に滑りが発生し、外環とシューとの摩擦によって
過熱されたり異状摩耗が生じる等の危険があった。例え
ば、自動枝打機のチェンソーが、樹木等でロックされた
場合に、ヂエンソーに動力を伝達する遠心クラッチの外
環とシューとの間に滑りが発生して過熱され、遠心クラ
ッチの寿命が極端に短かくなったりする不都合が生ずる
。Conventional technology Generally speaking, when an overload is applied to the driven part of a centrifugal clutch, the rotational speeds of the driven part and the driving part differ, causing slippage between the outer ring and the shoe. There was a risk of overheating due to friction and abnormal wear. For example, when a chainsaw used in an automatic branching machine is locked by a tree, etc., slipping occurs between the outer ring and shoe of the centrifugal clutch that transmits power to the saw, causing overheating and shortening the life of the centrifugal clutch. This causes the inconvenience that the length may become shorter.
発明が解決しようとする問題点
そこで本発明は、外環とシューとの過負荷時の滑りによ
る過熱を防止した過負荷防止遠心クラッチを促供するこ
とを目的とするもので、遠心クラッチの回転伝達方法を
従来の遠心クラッチと逆にしたことを特徴とする特
問題点を解決するための手段
即ち、本発明に係る遠心クラッチは、遠心クラッチ装置
の外Ｉ）側に駆動軸を設けると共にシュー側に従動軸を
設（）、駆！ｌＩｌ軸と従動軸とを軽負荷で連りＪさせ
る連動装置を備えている。Problems to be Solved by the Invention Therefore, an object of the present invention is to provide an overload prevention centrifugal clutch that prevents overheating due to slippage between the outer ring and the shoe during overload, and to improve rotational transmission of the centrifugal clutch. Means for solving the special problem characterized in that the method is reversed to that of the conventional centrifugal clutch, that is, the centrifugal clutch according to the present invention is provided with a drive shaft on the outside I) side of the centrifugal clutch device, and a drive shaft on the shoe side. Set up a driven shaft () and drive! It is equipped with an interlocking device that connects the IIl shaft and the driven shaft with a light load.
作用
従って、駆動軸が回転すると、駆動軸に固定された外環
が回転し、連！ｌＩＢ首を介して従動軸が回転され、従
動軸に取着されたシューに外環内周面に押圧するに十分
な遠心力が作用する回転数になると外環とシューは強固
に連結し、連動装置が作動しなくとも駆動軸の回転力は
確実に従動軸に伝達される。しかし、従動軸が過負荷を
受けて減速また１ま停止すると、シューに外環との連結
に十分な遠心力が加わらなくなり、シューは瞬時に外環
内周面から離れ、外環とシューが摩擦により過熱される
ことがない。シューが外環から離れると、連ｖＪ装胃が
作ＩＪ−ｊるが、この連動装置は駆動軸と従動軸とを軽
負荷で連動しているので、駆動軸が回転し従動軸が停止
していても、連動装置に問題になる程の熱は発生しない
。Effect: Therefore, when the drive shaft rotates, the outer ring fixed to the drive shaft rotates and the connection! When the driven shaft is rotated through the IIB neck and the rotation speed reaches a point where sufficient centrifugal force is applied to the shoe attached to the driven shaft to press the inner peripheral surface of the outer ring, the outer ring and the shoe are firmly connected. Even if the interlocking device does not operate, the rotational force of the drive shaft is reliably transmitted to the driven shaft. However, if the driven shaft is overloaded and decelerates or stops, sufficient centrifugal force will not be applied to the shoe to connect it to the outer ring, and the shoe will instantly separate from the inner circumferential surface of the outer ring, causing the outer ring and shoe to separate. No overheating due to friction. When the shoe separates from the outer ring, the interlocking VJ mechanism is activated, but since this interlocking device interlocks the drive shaft and driven shaft with a light load, the drive shaft rotates and the driven shaft stops. Even if it is installed, it does not generate enough heat to cause problems for the interlocking device.
実施例
以下に本発明を図面に示した実施例に基づいて説明する
。EXAMPLES The present invention will be explained below based on examples shown in the drawings.
本実施例は遠心クラッチを自動枝打機の鋸断部に設けた
チェノソーに適用した例で、第１図に示した自動枝打機
は動力源として内燃機関（図示せず）を有し、′この内
燃機関からの動力により駆動される駆動軸１に本発１１
に係る遠心クラツヂ装置２の外環７が取付けられており
、遠心クラッチ装置２のシュー８に連結された従動軸１
１は鋸刃を取付けたソーチェン１７に係合するスプロケ
ット３に駆動上連結されており、駆動軸１の回転を遠心
クラッチ装置２を介してスプ１コケツ！・３に伝達し、
チェノ１７を駆動して鋸刃により樹木の枝などを切断す
るようになっている。This embodiment is an example in which a centrifugal clutch is applied to a chenosaw equipped with a sawing section of an automatic pruning machine, and the automatic pruning machine shown in FIG. 1 has an internal combustion engine (not shown) as a power source. 'The main engine 11 is connected to the drive shaft 1 driven by the power from this internal combustion engine.
The outer ring 7 of the centrifugal clutch device 2 is attached to the driven shaft 1 connected to the shoe 8 of the centrifugal clutch device 2.
1 is drivingly connected to a sprocket 3 that engages a saw chain 17 to which a saw blade is attached, and the rotation of the drive shaft 1 is controlled by a centrifugal clutch device 2.・Communicate to 3,
A chino 17 is driven to cut tree branches and the like with a saw blade.
駆動軸１に連結された駆動部材４は一端部に駆動軸１と
連結される継手部を有し、駆動軸１のビン５と係合づる
ビン受は凹部６を形成しており、他端部に遠心クラッチ
装置２の外環７を形成している９、この外環７の内周面
にＩ’Ｊｍ係合するシュー８は三個で形成されており、
第２図に示したように周方向に等角度に離れて形成され
た三個の半径方向外方へ延びるボス部４４９により案内
される。The drive member 4 connected to the drive shaft 1 has a joint part connected to the drive shaft 1 at one end, the bottle holder that engages with the bottle 5 of the drive shaft 1 forms a recess 6, and the other end has a joint part connected to the drive shaft 1. The outer ring 7 of the centrifugal clutch device 2 is formed in the outer ring 7, and the shoes 8 that engage with the inner circumferential surface of the outer ring 7 are formed of three pieces.
As shown in FIG. 2, it is guided by three radially outwardly extending boss portions 449 formed equiangularly apart in the circumferential direction.
即ち、それぞれのシュー８はその半径方向に延びる溝１
０を形成しており、溝１０はボス部材９とそれぞれ遊嵌
してシュー８を半径方向へ囲動可能に案内する。That is, each shoe 8 has a groove 1 extending in its radial direction.
0, and the grooves 10 loosely fit with the boss members 9 to guide the shoes 8 so as to be movable in the radial direction.
ボス部材９は従動軸１１にキー１８を介してスブロケツ
］へ３と共に固定されており、従ｖＪ軸１１の外側に前
記駆動部材４をニードルベアリング１９を介して同心に
嵌合している。第１図に示ずにうに従動軸１１の表面に
凹所１２を形成しており、駆動部材４にこの従１ｊｊＩ
軸１１の凹所１２と対向する部分に孔１３を形成してば
ね１４とボール１５を嵌入し、ボール１５が従動ｌＮ１
１１の凹所１２に係合でさるようになっている。このボ
ール１５はばね１４で常時凹所１２の方向に付勢されて
いるので、駆動軸１によって駆動部材４が回転すると、
ボール１５と凹所１２の係合によって従動軸１１を同じ
方向に回転させるように動き、従動軸１１を止めれば、
ボール１５はばね１４に抗して凹所１２よりはずれ、従
動＠１１の周りを転動する。従って、駆動部材４は従動
軸１１が固定された状態でも回転できる。この装置が連
！ＩＩＩｊ装置で、被駆動側にシュー８を設けても遠心
クラッチの働きを与えることができ、回転中に従動＠１
１に過負荷が加わって従動軸１１の回転数が所定回転数
以下になるとシュー８に遠心力が作用しなくなり瞬時に
してクラツヂ装置２の係合がＷ？除され、シュー８と外
環７とを軽く接触させるだけでクラッチ係合状態での外
環とシューの漬りにＪ、る１ｆ擦熱の発生を防止する。The boss member 9 is fixed to the driven shaft 11 via a key 18 together with the sub-block 3, and the driving member 4 is fitted concentrically to the outside of the driven VJ shaft 11 via a needle bearing 19. A recess 12 is formed on the surface of the driven shaft 11, not shown in FIG.
A hole 13 is formed in a portion of the shaft 11 facing the recess 12, into which a spring 14 and a ball 15 are fitted.
It is adapted to be inserted into the recess 12 of 11 by engagement. Since this ball 15 is always urged in the direction of the recess 12 by the spring 14, when the drive member 4 is rotated by the drive shaft 1,
If the driven shaft 11 is rotated in the same direction by the engagement of the ball 15 and the recess 12, and the driven shaft 11 is stopped,
The ball 15 moves out of the recess 12 against the spring 14 and rolls around the follower @11. Therefore, the driving member 4 can rotate even when the driven shaft 11 is fixed. This device is connected! With the IIIj device, even if the shoe 8 is provided on the driven side, it can provide the function of a centrifugal clutch, and the driven @ 1
When an overload is applied to the driven shaft 11 and the number of rotations of the driven shaft 11 falls below a predetermined number of rotations, centrifugal force no longer acts on the shoe 8, and the engagement of the clutch device 2 instantly changes to W? By only lightly contacting the shoe 8 and the outer ring 7, generation of frictional heat caused by soaking between the outer ring and the shoe in the clutch engaged state can be prevented.
第３図は他の実施例としての連動装置を示すもので、外
環７の内周面に凸ａｔ（１６を形成したもので、シュー
８も外環内周面との対向部を内周面形状に一致するよう
に形成されている。この実施例の場合は、外環７が回転
Ｍ−ると、下方にあるシュー８が自重でボス部材９の先
端方向に移ＩＪＪ シて外ＩＭ７の内周面に１ｍしてい
るので、口のシュー８の外端面が凸部１６に当接しＣ抵
抗力を受は駆動軸１と従動軸１１とを軽負荷で連動させ
ることができ、従動軸１１を回転してシュー８に遠心力
を与えて遠心クラッチ装置２を作動する。FIG. 3 shows an interlocking device as another embodiment, in which a convex at (16) is formed on the inner circumferential surface of the outer ring 7, and the shoe 8 also has a portion facing the inner circumferential surface of the outer ring on the inner circumferential surface. In this embodiment, when the outer ring 7 rotates M-, the lower shoe 8 moves toward the tip of the boss member 9 by its own weight, and the outer ring 7 moves toward the tip of the boss member 9. Since the outer end surface of the shoe 8 contacts the convex part 16 and receives the C resistance force, the drive shaft 1 and the driven shaft 11 can be interlocked with a light load, and the driven shaft 11 can be interlocked with a light load. The centrifugal clutch device 2 is actuated by rotating the shaft 11 and applying centrifugal force to the shoe 8.
発明の効果
本発明は駆動軸と従動軸を連結する遠心クラッチの外環
とシューを従来の遠心クラッチの通常の使用法と逆にし
ており、両軸を軽負荷で連動する連動％！Ｌ置を設ける
ことにより、従ＩＩ＠に過負荷が加わって回転数が低下
又は停止すると、遠心クラッチの外環とシューとの係合
が瞬時にして解除されクラツヂ係合状態での外環とシュ
ーの滑りによる摩擦熱の発生を防止し、その連動装置も
簡単な構造で提供できるので、量産に適し、安価にして
確実に作＋ｈ （：５ｖることができる等の効果を有す
る。Effects of the Invention The present invention uses the outer ring and shoe of the centrifugal clutch that connects the drive shaft and the driven shaft in the opposite way to the normal usage of conventional centrifugal clutches, allowing the interlocking of both shafts under light loads! By providing the L position, when an overload is applied to the slave II and the rotational speed decreases or stops, the engagement between the outer ring of the centrifugal clutch and the shoe is instantly released, and the outer ring and the shoe in the clutch engaged state are instantly disengaged. Since the generation of frictional heat due to shoe slipping is prevented, and the interlocking device can be provided with a simple structure, it is suitable for mass production, and has effects such as being able to operate reliably at low cost.
図面は本発明に係る実施例を示すもので、第１図は過負
荷防止遠心クラッチの要部断面図、第２図は第１図の遠
心クラツヂ装装置の外環とシューとの停台状態を示す側
面図、そして第３図は他の実施例の外環とシューとの停
台状態を示ず側面図である。
１・・・駆動軸、２・・・遠心クラツヂ装置、７・・・
外環、８・・・シュー、１１・・・従動軸。The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of a main part of an overload prevention centrifugal clutch, and FIG. 2 is a stopped state of the outer ring and shoe of the centrifugal clutch fitting device shown in FIG. 1. FIG. 3 is a side view of another embodiment without showing the outer ring and shoe in a stopped state. 1... Drive shaft, 2... Centrifugal clutch device, 7...
Outer ring, 8... shoe, 11... driven shaft.
Claims (3)
にシュー側に従動軸を設け、該駆動軸と従動軸とを軽負
荷で連動させる連動装置を備えたことを特徴とする過負
荷防止遠心クラッチ。(1) Overload prevention characterized by providing a drive shaft on the outer ring side of the centrifugal clutch device and a driven shaft on the shoe side, and an interlocking device that interlocks the drive shaft and the driven shaft with a light load. centrifugal clutch.
構造にすると共に従動軸表面に形成した凹所に駆動軸側
に配設したボールをばねで押圧当接して駆動軸と従動軸
とを軽負荷で連動させることを特徴とする特許請求の範
囲第１項記載の遠心クラッチ。(2) The interlocking device has a concentric double structure between the drive shaft and the driven shaft, and a ball disposed on the drive shaft side is pressed into contact with a recess formed on the surface of the driven shaft by a spring, so that the drive shaft and the driven shaft are The centrifugal clutch according to claim 1, characterized in that the centrifugal clutch is interlocked with the shaft under a light load.
共に前記シューの少なくとも一つがシュー自身の重量で
半径方向外方にあつて前記外環の回転時に前記凸部に当
接して駆動軸と従動軸とを軽負荷で連動させることを特
徴とする特許請求の範囲第１項記載の遠心クラッチ。(3) The interlocking device has a protrusion formed on the inner surface of the outer ring, and at least one of the shoes is radially outward due to the shoe's own weight, and is driven by coming into contact with the protrusion when the outer ring rotates. The centrifugal clutch according to claim 1, wherein the shaft and the driven shaft are interlocked with each other under a light load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61028197A JPS62188826A (en) | 1986-02-12 | 1986-02-12 | Over-loading preventive centrifugal clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61028197A JPS62188826A (en) | 1986-02-12 | 1986-02-12 | Over-loading preventive centrifugal clutch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62188826A true JPS62188826A (en) | 1987-08-18 |
| JPH0440568B2 JPH0440568B2 (en) | 1992-07-03 |
Family
ID=12241945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61028197A Granted JPS62188826A (en) | 1986-02-12 | 1986-02-12 | Over-loading preventive centrifugal clutch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62188826A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016050595A (en) * | 2014-08-28 | 2016-04-11 | トックベアリング株式会社 | Centrifugal clutch and geared motor with the same |
| JP2021028481A (en) * | 2019-08-09 | 2021-02-25 | 株式会社やまびこ | Control device of engine for working machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS522052A (en) * | 1975-06-24 | 1977-01-08 | Koito Ind Co Ltd | Prefablicated toilet |
-
1986
- 1986-02-12 JP JP61028197A patent/JPS62188826A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS522052A (en) * | 1975-06-24 | 1977-01-08 | Koito Ind Co Ltd | Prefablicated toilet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016050595A (en) * | 2014-08-28 | 2016-04-11 | トックベアリング株式会社 | Centrifugal clutch and geared motor with the same |
| JP2021028481A (en) * | 2019-08-09 | 2021-02-25 | 株式会社やまびこ | Control device of engine for working machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0440568B2 (en) | 1992-07-03 |
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