JPH0528984Y2 - - Google Patents
Info
- Publication number
- JPH0528984Y2 JPH0528984Y2 JP1987025696U JP2569687U JPH0528984Y2 JP H0528984 Y2 JPH0528984 Y2 JP H0528984Y2 JP 1987025696 U JP1987025696 U JP 1987025696U JP 2569687 U JP2569687 U JP 2569687U JP H0528984 Y2 JPH0528984 Y2 JP H0528984Y2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- transmission shaft
- lubricant
- outer tube
- brush cutter
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 description 18
- 239000000463 material Substances 0.000 description 16
- 238000013021 overheating Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 230000035939 shock Effects 0.000 description 4
- 239000004519 grease Substances 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Harvester Elements (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、携帯式の動力刈払機の伝動軸と、
之を被覆する外管との間に介装された防振材の一
側に少なくとも、円周方向に沿い切欠部を設ける
ことで、エンジンの駆動時での伝動軸と軸受とに
おける過熱状態を防ぎ、併せて刈払作業時での振
動、衝撃の抑制、緩和を図るようにした動力刈払
機の伝動軸支持装置に関するものである。[Detailed explanation of the invention] [Industrial application field] This invention is based on the power transmission shaft of a portable power brush cutter,
By providing at least a notch along the circumferential direction on one side of the vibration isolating material interposed between the outer tube and the outer tube that covers the outer tube, it is possible to prevent overheating of the transmission shaft and bearing when the engine is running. The present invention relates to a power transmission shaft support device for a power brush cutter that is designed to prevent vibrations and shocks during brush cutting operations.
携帯式の動力刈払機における刈払刃の回転で雑
草、つる、潅木等を刈払うとき、エンジンで駆動
される伝動軸と刈払刃の回転時に発生する振動、
衝撃を抑制、緩和する手段として、たとえば
（）第６図にみるように、外管１内に軸受２と、
之を被覆する防振材３とからなる支持具が、外管
１内に通常、５ないし６個、空気圧利用の押込み
器で適宜間隔のもとで挿入・嵌合された構成を採
用している。
When mowing weeds, vines, shrubs, etc. with the rotation of the cutting blade in a portable power brush cutter, vibrations occur when the power transmission shaft driven by the engine and the cutting blade rotate.
As a means for suppressing and alleviating impact, for example, as shown in FIG. 6, a bearing 2 is installed inside the outer tube 1.
A configuration is adopted in which five to six supports, each consisting of a vibration isolating material 3 covering the outer tube 1, are inserted and fitted at appropriate intervals into the outer tube 1 using a pneumatic pusher. There is.
また、（）他の形式として外管とこの内部に
沿設された伝動軸との間で軸受が、伝動軸の長手
方向に亘り貫通され、かつ外周縁に沿い適数個の
凹所を具えた防振材に把持・定着された構成を採
用している。（たとえば一例として実・開昭60−
131118号公報参照）
〔考案が解決しようとする課題〕
従来の技術の項で述べた（）の場合にあつて
は、伝動軸４を回転自在に支持する軸受２の内周
面に予め潤滑剤を塗布し、伝動軸４の回転による
軸受２の過熱状態を予め阻止しているが、当該軸
受２に少許の間隙ｃを介し伝動軸４が貫通されて
いるので、潤滑剤が過熱され、流動し易くなり、
よつて常時、多量の潤滑剤を軸受２内に貯留不可
能となり、このため軸受２自体が過熱で焼損する
一方、潤滑剤自体も機能の低下もしくは喪失する
惧れがある等の欠点を免れ難い。 In addition, as another type (), the bearing is passed through the transmission shaft in the longitudinal direction between the outer tube and the transmission shaft installed inside the outer tube, and is provided with an appropriate number of recesses along the outer periphery. The structure is such that it is gripped and fixed to vibration isolating material. (For example, in the 1980s,
(Refer to Publication No. 131118) [Problem to be solved by the invention] In the case of () mentioned in the section of the prior art, lubricant is applied in advance to the inner circumferential surface of the bearing 2 that rotatably supports the transmission shaft 4. The lubricant is coated to prevent the bearing 2 from overheating due to the rotation of the transmission shaft 4. However, since the transmission shaft 4 passes through the bearing 2 with a small gap c, the lubricant is overheated and flows. It becomes easier to
Therefore, it is impossible to store a large amount of lubricant in the bearing 2 at all times, and as a result, the bearing 2 itself may burn out due to overheating, while the lubricant itself is also at risk of deteriorating or losing its function. .
また、（）の場合にあつては、凹所が伝動軸
の長手方向に亘り貫通されている故、（）の場
合におけると同様に潤滑剤が前後に亘つて容易に
流動し、また、防振材の一側に定着された軸受へ
の長期に亘る潤滑剤の貯留が不可能なため、軸受
の冷却が充分とは云い難く、なお、、稍もすれば、
（）の形式に比し構造の複雑化を余儀なくされ
る等の欠点を免れ難い。 In the case of (), since the recess is penetrated in the longitudinal direction of the transmission shaft, the lubricant easily flows back and forth as in the case of (), and prevents the Since lubricant cannot be stored in the bearing fixed on one side of the vibration material for a long period of time, it is difficult to say that the cooling of the bearing is sufficient.
It is difficult to avoid drawbacks such as a more complicated structure compared to the () format.
この考案は前述のような欠点に鑑み提案された
もので、その目的とする所は、軸受への潤滑剤を
長期に亘り貯留して伝動軸と軸受との過熱を防ぐ
一方、刈払作業時での振動、衝撃の抑制、緩和を
期待できる動力刈払機の伝動軸支持装置を提供し
ようとするものである。 This idea was proposed in view of the above-mentioned drawbacks, and its purpose was to store lubricant in the bearing for a long period of time to prevent overheating of the transmission shaft and bearing, while also preventing the lubricant from overheating during grass cutting operations. The present invention aims to provide a power transmission shaft support device for a power brush cutter that can be expected to suppress and alleviate vibrations and shocks.
前述の目的達成のため、この考案に係る動力刈
払機の伝動軸支持装置は、伝動軸を金属製の適数
個の軸受で回転自在に支持し、これら軸受の夫々
と外管との間に弾性状の防振材を密嵌・介装した
動力刈払機において、防振材に、円周方向に沿
い、かつ軸受の一部が露出するような切欠部を少
なくとも一側に設けてなるものである。
In order to achieve the above-mentioned object, the transmission shaft support device for a power brush cutter according to this invention rotatably supports the transmission shaft with an appropriate number of metal bearings, and there is a gap between each of these bearings and the outer pipe. A power brush cutter in which an elastic vibration isolator is tightly fitted or interposed, and the vibration isolator is provided with a notch on at least one side along the circumference and exposing a part of the bearing. It is.
この考案において、切欠部にグリースのような
潤滑剤を貯留させるとき、軸受近傍に多量の潤滑
剤を滞留できるため、軸受の寿命を従来形式の夫
れに比し増大させ得るし、また、軸受の一部に潤
滑剤が直接に接触するので、熱伝達による潤滑剤
の潤滑膜を容易に軸受に形成でき、伝動軸の回転
による熱の発生を抑制する一方、伝動軸の過熱に
基づく膨脹と伝動軸、軸受間における摩擦による
焼損をも抑制、緩和し、また、防振の少なくとも
一側に設けられた切欠部の存在で、外管内への防
振材の嵌挿が容易であり、なお、切欠部にグリー
スのような潤滑剤を付着させることで、切欠部の
ない従来形式の防振材利用の軸受に比し、より多
量の潤滑剤を貯留可能で、しかも当該切欠部を介
し伝動軸から軸受に伝達される熱を外管を経て外
部に放出させるため、刈払作業時、軸受、防振材
が異常に過熱される惧れがないと共に、刈払作業
での刈払刃の異物との当接に基づく衝撃、振動等
の軸受への伝達を緩和し、さらに防振材の変形度
合を従来の夫れに比し増大できるため、防振機能
をより向上可能な上に、当該防振材の製作に際
し、特に煩雑な工程、機器類を要しない。
With this invention, when a lubricant such as grease is stored in the notch, a large amount of lubricant can be stored near the bearing, which can extend the life of the bearing compared to conventional types. Since the lubricant is in direct contact with a portion of the bearing, a lubricant film can be easily formed on the bearing due to heat transfer, suppressing the generation of heat due to the rotation of the transmission shaft, and preventing expansion due to overheating of the transmission shaft. Burnout due to friction between the transmission shaft and bearings is suppressed and alleviated, and the presence of a notch on at least one side of the vibration isolator makes it easy to insert and insert the vibration isolator into the outer tube. By attaching a lubricant such as grease to the notch, it is possible to store a larger amount of lubricant compared to conventional bearings that do not have a notch and use vibration isolating material, and also to reduce transmission through the notch. Since the heat transferred from the shaft to the bearing is released to the outside through the outer pipe, there is no risk of the bearing and vibration isolating material becoming abnormally overheated during mowing work, and the mowing blade is It reduces the transmission of shocks, vibrations, etc. to the bearing due to contact with foreign objects, and also increases the degree of deformation of the vibration isolating material compared to conventional materials, which not only improves the vibration isolation function, but also When producing the vibration isolating material, no particularly complicated process or equipment is required.
以下第１図ないし第５図についてこの考案の実
施例を述べるに、後方（第１図、第５図において
左側を前方、右側を後方とする。）にクラツチケ
ースｋを、前方に歯車筐Ｎを夫々取付けた外管１
１の内側に、第１図にみるように、エンジンＥで
回動される伝動軸１４を、その長手方向に沿い円
筒状の金属製の適数個（通常、５ないし６個）の
軸受１２で少許の間隙t1を介し回転自在に支持
し、これら軸受１２の夫々を、ゴムもしくは合成
樹脂のような弾性材質からなる防振材１３で被覆
し、これら防振材１３の外周縁に外管１１の内周
縁を密着させる一方、防振材１３の円周方向に沿
い少なくともエンジンＥ側において切欠部a1を適
数個並設し、かつこれら切欠部a1から軸受１２の
外周縁の一部が露出するようにしてある。しかし
て伝動軸１４に沿設された相隣なれる軸受１２，
１２相互間の空所Ｖおよび切欠部a1の夫々に潤滑
剤ｇたとえばグリースを少量（全体として10〜15
グラム程度）貯留させておく。第４図にみるよう
に、防振材１３の前後に、夫々Ｕ字状もしくはＶ
字状の切欠部a1，b1を円周方向に沿い夫々交互の
位相差で並設し、かつ軸受１２の外周縁の一部が
露出するようにし、また、第２図、第３図にみる
ように、切欠部a1，b1を所望の所定角度の位相差
のもとに形成させてある。
The embodiment of this invention will be described below with reference to Figs. 1 to 5. A clutch case K is placed at the rear (in Figs. 1 and 5, the left side is the front and the right side is the rear), and the gear case N is placed at the front. Outer tube 1 with each attached
As shown in FIG. 1, a suitable number (usually 5 or 6) of cylindrical metal bearings 12 are placed inside the transmission shaft 14 along its longitudinal direction to support the transmission shaft 14 rotated by the engine E. Each of these bearings 12 is covered with a vibration isolating material 13 made of an elastic material such as rubber or synthetic resin, and the outer periphery of the vibration isolating material 13 is While the inner circumferential edge of the pipe 11 is brought into close contact, an appropriate number of notches a 1 are arranged in parallel along the circumferential direction of the vibration isolating material 13 at least on the engine E side, and from these notches a 1 to the outer circumferential edge of the bearing 12. Part of it is exposed. Therefore, the bearings 12 installed along the transmission shaft 14, which can be adjacent to each other,
1. Apply a small amount of lubricant (g, for example, grease) to each of the spaces V between the two and the notches a1 (10 to 15
(about 1 gram). As shown in FIG. 4, the vibration isolating material 13 has a U-shaped or
The letter-shaped notches a 1 and b 1 are arranged in parallel along the circumferential direction with alternating phase differences, and a part of the outer peripheral edge of the bearing 12 is exposed. As shown in , the notches a 1 and b 1 are formed with a phase difference of a desired predetermined angle.
この実施例にあつては、刈払刃１５の側にも切
欠部b1が形成されているので、軸受１２の前方に
も潤滑剤ｇによる潤滑膜が形成される故、伝動軸
１４の回動で発生する熱に対しても軸受１２の過
熱を防止できるので永き使用に耐え、また、防振
材１３の軸受１２への装着も前後における切欠部
a1，b1の存在で容易であり、なお、刈払作業時に
おける振動、衝撃をも切欠部a1，b1の存在で従来
の刈払機に比し、より吸振機能を増大でき、作業
者の早期被露を招来しない。 In this embodiment, since the notch b 1 is also formed on the side of the brush cutting blade 15, a lubricant film of the lubricant g is formed also in front of the bearing 12, so that the rotation of the transmission shaft 14 is prevented. The bearing 12 can be prevented from overheating due to the heat generated by the motion, so it can be used for a long time.
The presence of the notches a 1 and b 1 makes it easier to reduce vibrations and shocks during brush cutting work, and the presence of the notches a 1 and b 1 increases the vibration absorption function compared to conventional brush cutters, making the work easier. This will not lead to early exposure of people.
図中、Ｆは燃料槽、Ｈは操作ハンドル、Ｓはス
トツプレバー、１６は背負バンド、１７はスロツ
トルレバー、１８はスロツトルワイヤー、ｄ，e1
は軸受１２の側面、ｐ，q1は防振材１３における
折曲片である。 In the figure, F is the fuel tank, H is the operating handle, S is the stop lever, 16 is the backpack strap, 17 is the throttle lever, 18 is the throttle wire, d, e 1
is the side surface of the bearing 12, and p and q 1 are bent pieces of the vibration isolating material 13.
第１図はこの考案に係る実施例の要部縦断面
図、第２図は第１図の−線断面図、第３図は
第１図の−線断面図、第４図は防振材の円周
方向に沿う軸受被覆時の展開図、第５図は動力刈
払機の要部側面図、第６図は従来の動力刈払機に
おける伝動軸支持態様の要部断面図である。
１１……外管、１２……軸受、１３……防振
材、１４……伝動軸、a1，b1……切欠部。
Fig. 1 is a vertical sectional view of the main part of the embodiment according to this invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a vibration-proofing material. FIG. 5 is a side view of the main part of the power brush cutter, and FIG. 6 is a cross-sectional view of the main part of a conventional power brush cutter in which the transmission shaft is supported. DESCRIPTION OF SYMBOLS 11... Outer tube, 12... Bearing, 13... Vibration isolating material, 14... Transmission shaft, a1 , b1 ... Notch part.
Claims (1)
持し、これら軸受の夫々と外管との間に弾性状の
防振材を密嵌・介装した動力刈払機において、防
振材に、円周方向に沿い、かつ軸受の一部が露出
するような切欠部を少なくとも一側に設けてなる
動力刈払機の伝動軸支持装置。 In a power brush cutter, the transmission shaft is rotatably supported by an appropriate number of metal bearings, and elastic vibration isolators are tightly fitted and interposed between each of these bearings and the outer tube. A transmission shaft support device for a power brush cutter, comprising a notch extending along the circumference and on at least one side of the bearing so that a part of the bearing is exposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987025696U JPH0528984Y2 (en) | 1987-02-25 | 1987-02-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987025696U JPH0528984Y2 (en) | 1987-02-25 | 1987-02-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63134622U JPS63134622U (en) | 1988-09-02 |
| JPH0528984Y2 true JPH0528984Y2 (en) | 1993-07-26 |
Family
ID=30826093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987025696U Expired - Lifetime JPH0528984Y2 (en) | 1987-02-25 | 1987-02-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0528984Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4057483B2 (en) * | 2003-07-02 | 2008-03-05 | 本田技研工業株式会社 | Brush box gearbox structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146723B2 (en) * | 1971-09-06 | 1976-12-10 | ||
| JPS5146724B2 (en) * | 1971-09-07 | 1976-12-10 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146724U (en) * | 1974-10-07 | 1976-04-07 | ||
| JPS5146723U (en) * | 1974-10-07 | 1976-04-07 |
-
1987
- 1987-02-25 JP JP1987025696U patent/JPH0528984Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146723B2 (en) * | 1971-09-06 | 1976-12-10 | ||
| JPS5146724B2 (en) * | 1971-09-07 | 1976-12-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63134622U (en) | 1988-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0528984Y2 (en) | ||
| JPH0711549Y2 (en) | Anti-vibration device for brush cutter | |
| JPH0516896Y2 (en) | ||
| JPS6312679Y2 (en) | ||
| JPS6245548Y2 (en) | ||
| JPH0140429Y2 (en) | ||
| USH380H (en) | Trimmer | |
| JPH0214345Y2 (en) | ||
| JPH0650418U (en) | Brush cutter | |
| JPS6142336Y2 (en) | ||
| JPS6242665Y2 (en) | ||
| JPH0216584Y2 (en) | ||
| JPS5912442Y2 (en) | Agricultural machinery pulley | |
| JP2550644Y2 (en) | Clutch housing for brush cutter | |
| JPH026738Y2 (en) | ||
| JPH0237302Y2 (en) | ||
| JP2588127Y2 (en) | Non-rotating structure for brush liner bearings | |
| JPH0644338Y2 (en) | Anti-vibration device for brush cutter | |
| JPH0320Y2 (en) | ||
| JPH026737Y2 (en) | ||
| JPH0411475Y2 (en) | ||
| JPS5934088B2 (en) | brush cutter | |
| JPH052051Y2 (en) | ||
| JPH0210892Y2 (en) | ||
| JPH0142990Y2 (en) |