JPH0734895A - Vibration-proofing device for mower - Google Patents
Vibration-proofing device for mowerInfo
- Publication number
- JPH0734895A JPH0734895A JP5175790A JP17579093A JPH0734895A JP H0734895 A JPH0734895 A JP H0734895A JP 5175790 A JP5175790 A JP 5175790A JP 17579093 A JP17579093 A JP 17579093A JP H0734895 A JPH0734895 A JP H0734895A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- engine
- peripheral surface
- vibration
- outer peripheral
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Harvester Elements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、刈払機の防振装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator for a brush cutter.
【０００２】[0002]
【従来の技術】従来、エンジンを動力源とする刈払機に
おいては、エンジンから発生した振動が作業者に伝わる
ことを防止するための防振装置が設けられており、従来
の防振装置の一例を図４乃至図６に基づいて説明する。
まず、図４は刈払機の全体構造を示したもので、エンジ
ン１の外装ケース２には円筒状のホルダ部３が形成さ
れ、このホルダ部３には中空状のパイプ４の一端側が挿
入されている。一方、パイプ４の他端側にはギヤケース
５が連結され、このギヤケース５内に回転自在に保持さ
れた刈刃軸（図示せず）に刈刃６が連結されている。ま
た、前記パイプ４内には前記エンジン１からの動力を前
記刈刃６に伝達するための伝動軸７が挿通されている。2. Description of the Related Art Conventionally, a brush cutter having an engine as a power source is provided with a vibration isolator for preventing the vibration generated from the engine from being transmitted to an operator. One example of the conventional vibration isolator Will be described with reference to FIGS.
First, FIG. 4 shows the entire structure of the brush cutter. A cylindrical holder portion 3 is formed in the outer case 2 of the engine 1, and one end side of a hollow pipe 4 is inserted into the holder portion 3. ing. On the other hand, a gear case 5 is connected to the other end of the pipe 4, and a cutting blade 6 is connected to a cutting blade shaft (not shown) rotatably held in the gear case 5. Further, a transmission shaft 7 for transmitting the power from the engine 1 to the cutting blade 6 is inserted into the pipe 4.
【０００３】ここで、ホルダ部３内へのパイプ４の挿入
状態について詳述すると、筒状の第一防振部材８と筒状
の第二防振部材９とが設けられ、これらの第一・第二防
振部材８，９が嵌合されると共に前記ホルダ部３内に圧
入されている。そして、この第一防振部材８内へ前記パ
イプ４の一端側が挿入されている。なお、前記第一防振
部材８と第二防振部材９との嵌合は、第一防振部材８の
外周面にこの第一防振部材８の軸心方向にそって形成し
た複数条の突起１０を、第二防振部材９の内周面にこの
第二防振部材９の軸心方向にそって形成した複数条の係
合溝１１に係合させることにより行なわれている。ま
た、前記第一・第二防振部材８，９の前記ホルダ部３へ
の圧入は、前記ホルダ部３の内周面にこのホルダ部３の
軸心方向にそって形成した複数条の突起１２を、前記第
二防振部材９の外周面にこの第二防振部材９の軸心方向
にそって形成した複数条の係合溝１３に係合させること
により行なわれている。そして、突起１０と係合溝１１
との係合により第一防振部材８と第二防振部材９とが回
り止めされ、突起１２と係合溝１３との係合により第二
防振部材９とホルダ部３とが回り止めされている。Here, the insertion state of the pipe 4 into the holder portion 3 will be described in detail. A tubular first vibration isolation member 8 and a tubular second vibration isolation member 9 are provided. -The second anti-vibration members 8 and 9 are fitted and pressed into the holder portion 3. Then, one end side of the pipe 4 is inserted into the first vibration isolation member 8. The first vibration isolation member 8 and the second vibration isolation member 9 are fitted to each other by a plurality of strips formed on the outer peripheral surface of the first vibration isolation member 8 along the axial direction of the first vibration isolation member 8. The protrusion 10 is engaged with a plurality of engagement grooves 11 formed on the inner peripheral surface of the second vibration isolating member 9 along the axial direction of the second vibration isolating member 9. Further, the first and second anti-vibration members 8 and 9 are press-fitted into the holder part 3 by a plurality of projections formed on the inner peripheral surface of the holder part 3 along the axial direction of the holder part 3. 12 is engaged with a plurality of engagement grooves 13 formed on the outer peripheral surface of the second anti-vibration member 9 along the axial direction of the second anti-vibration member 9. Then, the protrusion 10 and the engaging groove 11
The first anti-vibration member 8 and the second anti-vibration member 9 are prevented from rotating by the engagement with, and the second anti-vibration member 9 and the holder portion 3 are prevented from rotating by the engagement of the protrusion 12 and the engagement groove 13. Has been done.
【０００４】つぎに、前記第一防振部材８には回り止め
ネジ取付部１４と締付ネジ取付部１５とが設けられてお
り、回り止めネジ取付部１４に回り止めネジ１６を取付
けることによって第一防振部材８がパイプ４に対して回
り止めされ、締付ネジ取付部１５に締付ネジ１７を取付
けることによって第一防振部材８がパイプ４の外周面に
圧接されている。Next, the first anti-vibration member 8 is provided with a non-rotating screw attaching portion 14 and a tightening screw attaching portion 15. By attaching the anti-rotating screw 16 to the anti-rotating screw attaching portion 14, The first vibration isolating member 8 is prevented from rotating with respect to the pipe 4, and the first vibration isolating member 8 is pressed against the outer peripheral surface of the pipe 4 by attaching the tightening screw 17 to the tightening screw attaching portion 15.
【０００５】このような構成において、パイプ４の一端
側をエンジン１側に連結する場合には、まず、第一防振
部材８と第二防振部材９とを嵌合させ、これらをホルダ
部３内に圧入し、ついで、パイプ４の一端側を第一防振
部材８内へ挿入する。そして、回り止めネジ１６と締付
ネジ１７とを取付ける。In the case of connecting one end side of the pipe 4 to the engine 1 side in such a structure, first, the first vibration isolating member 8 and the second vibration isolating member 9 are fitted to each other, and these are held. 3 is press-fitted into the pipe 3, and then one end of the pipe 4 is inserted into the first vibration isolator 8. Then, the rotation stop screw 16 and the tightening screw 17 are attached.
【０００６】ここで、エンジン１からの振動はホルダ部
３からパイプ４へ伝わり、さらに、パイプ４に取付けた
ハンドル１８に伝わると共にハンドル１８を握って草刈
作業を行なう作業者に伝わるが、その振動は、第一，第
二防振部材８，９により減衰されている。従って、作業
者に伝わる振動も減衰されて小さくなっている。Here, the vibration from the engine 1 is transmitted from the holder portion 3 to the pipe 4, and further to the handle 18 attached to the pipe 4, and also to the worker who holds the handle 18 and carries out the mowing work. Is damped by the first and second vibration isolation members 8 and 9. Therefore, the vibration transmitted to the worker is also attenuated and reduced.
【０００７】[0007]
【発明が解決しようとする課題】しかし、第一，第二防
振部材８，９をホルダ部３内に圧入する際に大きな力を
必要とし、手間がかかっている。また、メンテナンス等
のために第一，第二防振部材８，９を取外す際には専用
の工具を必要とすると共に手間がかかっている。However, when the first and second anti-vibration members 8 and 9 are press-fitted into the holder portion 3, a large force is required, which is troublesome. Further, when removing the first and second anti-vibration members 8 and 9 for maintenance or the like, a dedicated tool is required and it is troublesome.
【０００８】さらに、第一防振部材８と第二防振部材９
とを嵌合させた後にこれらをホルダ部３内に圧入してい
るため、ホルダ部３の外径寸法が大きくなり、重量の増
加及びコストアップとなっている。Further, the first vibration isolation member 8 and the second vibration isolation member 9
Since these are press-fitted into the holder portion 3 after they are fitted to each other, the outer diameter dimension of the holder portion 3 is increased, resulting in an increase in weight and an increase in cost.
【０００９】[0009]
【課題を解決するための手段】本発明は、エンジンとこ
のエンジンからの動力を刈刃へ伝達する伝動軸とこの伝
動軸を覆う中空状のパイプとを有する刈払機において、
前記エンジン側に前記パイプの一端側が挿入されるホル
ダ部を設け、前記パイプの一端側外周部の一部に防振部
材を取付けると共にこの防振部材が嵌合される嵌合凹部
を前記ホルダ部の内周部下方に形成し、前記ホルダ部の
内周面とこのホルダ部に挿入された前記パイプの一端側
外周面との間に前記ホルダ部の奥側に向かうにつれて次
第に狭くなると共に前記パイプの挿入側先端部の外周面
が前記ホルダ部の内周面に略接合する勾配クリアランス
を設けた。The present invention provides a brush cutter having an engine, a transmission shaft for transmitting power from the engine to a cutting blade, and a hollow pipe covering the transmission shaft.
A holder portion into which one end side of the pipe is inserted is provided on the engine side, a vibration isolating member is attached to a part of an outer peripheral portion of the pipe on one end side, and a fitting concave portion into which the vibration isolating member is fitted is provided in the holder portion. Is formed below the inner peripheral portion of the holder portion, and becomes gradually narrower toward the inner side of the holder portion between the inner peripheral surface of the holder portion and the outer peripheral surface on one end side of the pipe inserted into the holder portion, and the pipe There is provided a gradient clearance in which the outer peripheral surface of the insertion side distal end portion is substantially joined to the inner peripheral surface of the holder portion.
【００１０】[0010]
【作用】エンジンから発生した振動のパイプへの伝わり
は、ホルダ部の内周面とパイプの一端側外周面との間に
設けられた勾配クリアランスと、パイプに取り付けられ
てホルダ部の嵌合凹部に嵌合された防振部材とにより減
衰される。そして、ホルダ部の内周面とパイプの一端側
外周面との間のクリアランスがホルダ部の奥側に向かう
につれて次第に狭くなる勾配クリアランスであるため、
ホルダ部に対するパイプの着脱を簡単に行なえる。しか
も、ホルダ部に挿入されたパイプの挿入側先端部の外周
面がホルダ部の内周面に略接合するため、パイプに対す
るエンジン側の自重による傾きや、エンジンの運転時に
おけるパイプに対するエンジン側の揺動が低減される。The transmission of the vibration generated from the engine to the pipe is due to the gradient clearance provided between the inner peripheral surface of the holder and the outer peripheral surface on one end side of the pipe, and the fitting recess of the holder attached to the pipe. It is damped by the anti-vibration member fitted to. Since the clearance between the inner peripheral surface of the holder portion and the outer peripheral surface on one end side of the pipe is a gradient clearance that gradually narrows toward the inner side of the holder portion,
The pipe can be easily attached to and detached from the holder. Moreover, since the outer peripheral surface of the insertion-side tip portion of the pipe inserted in the holder portion is substantially joined to the inner peripheral surface of the holder portion, the inclination of the engine side with respect to the pipe due to its own weight and the inclination of the engine side relative to the pipe during operation of the engine Swinging is reduced.
【００１１】[0011]
【実施例】本発明の一実施例を図１乃至図３に基づいて
説明する。なお、図４乃至図６において説明した部分と
同一部分は同一符号で示し、説明も省略する。まず、本
実施例に係る刈払機の外観構造は図４に示した従来例の
刈払機と略同一であり、エンジン１の外装ケース２には
円筒状のホルダ部１９が形成され、このホルダ部１９に
は伝動軸７を覆う中空状のパイプ２０の一端側が挿入さ
れている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The same parts as those described in FIGS. 4 to 6 are designated by the same reference numerals, and the description thereof will be omitted. First, the external structure of the brush cutter according to the present embodiment is substantially the same as that of the conventional brush cutter shown in FIG. 4, and a cylindrical holder portion 19 is formed in the outer case 2 of the engine 1. One end side of a hollow pipe 20 that covers the transmission shaft 7 is inserted into 19.
【００１２】前記パイプ２０の一端側外周部の一部には
防振部材２１が取付けられており、防振部材２１を取付
けたパイプ２０の一端側をホルダ部１９内に挿入した際
に防振部材２１が嵌合される嵌合凹部２２が前記ホルダ
部１９の内周部下方に形成されている。ここで、前記防
振部材２１は、金属製の補強部材２３とこの補強部材２
３の周囲を覆ったゴム部材２４とにより形成されてい
る。そして、防振部材２１を嵌合凹部２２に嵌合させた
際において、嵌合凹部２２の内周部側面とゴム部材２４
の外周部側面との間には微小なクリアランス“Ｃ1 ”を
有するように寸法が設定され、また、補強部材２３の端
部とゴム部材２４の外周部側面との間は小さな間隔“Ｃ
2 ”に設定されている。An antivibration member 21 is attached to a part of the outer peripheral portion on one end side of the pipe 20, and when the one end side of the pipe 20 to which the antivibration member 21 is attached is inserted into the holder portion 19, antivibration is performed. A fitting concave portion 22 into which the member 21 is fitted is formed below the inner peripheral portion of the holder portion 19. Here, the vibration isolation member 21 includes a metal reinforcement member 23 and the reinforcement member 2
3 and a rubber member 24 that covers the periphery thereof. When the vibration-proof member 21 is fitted into the fitting recess 22, the inner peripheral side surface of the fitting recess 22 and the rubber member 24.
The dimension is set so as to have a minute clearance “C 1 ” with the outer peripheral side surface of the rubber member 24 and a small gap “C 1” between the end of the reinforcing member 23 and the outer peripheral side surface of the rubber member 24.
It is set to 2 ”.
【００１３】つぎに、前記パイプ２０の一端側には取付
穴２５と位置決め穴２６とが形成され、前記補強部材２
３には、位置決め穴２６に係合される突起２７と取付穴
２５に対向する取付穴２８とが形成されている。そし
て、突起２７を位置決め穴２６に係合させると共に、取
付穴２５と取付穴２８とを対向させて取付ネジ２９を螺
合させることにより、パイプ２０への防振部材２１の取
付けが行なわれている。Next, a mounting hole 25 and a positioning hole 26 are formed on one end side of the pipe 20, and the reinforcing member 2
A protrusion 27 that engages with the positioning hole 26 and a mounting hole 28 that faces the mounting hole 25 are formed at 3. Then, the protrusion 27 is engaged with the positioning hole 26, the mounting hole 25 and the mounting hole 28 are opposed to each other, and the mounting screw 29 is screwed into the mounting hole 25, so that the vibration-proof member 21 is mounted on the pipe 20. There is.
【００１４】また、前記ゴム部材２４の内部には前記パ
イプ２０の軸心方向と直交する向きに管状部材３０が挿
入されており、前記嵌合凹部２２の外壁部にはこの管状
部材３０に対向する抜止め穴３１が形成されている。そ
して、抜止め穴３１と管状部材３０とに抜止めネジ３２
を挿通し、この抜止めネジ３２をナット３３に螺合させ
ることにより前記パイプ２０がホルダ部１９から抜止め
されている。A tubular member 30 is inserted inside the rubber member 24 in a direction orthogonal to the axial direction of the pipe 20, and the outer wall of the fitting recess 22 faces the tubular member 30. A retaining hole 31 is formed. Then, the retaining screw 31 is attached to the retaining hole 31 and the tubular member 30.
The pipe 20 is retained from the holder portion 19 by inserting the retaining screw 32 into the nut 33 and screwing the retaining screw 32 into the nut 33.
【００１５】つぎに、前記ホルダ部１９の内周面には奥
側に向かうにつれて次第に縮径する勾配が付けられてお
り、ホルダ部１９の内周面とこのホルダ部１９内に挿入
された前記パイプ２０の一端側外周面との間には、ホル
ダ部１９の奥側に向かうにつれて次第に狭くなると共に
前記パイプ２０の挿入側先端部の外周面が前記ホルダ部
１９の内周面に略接合する勾配クリアランス３４が設け
られている。Next, the inner peripheral surface of the holder portion 19 is provided with a gradient such that the diameter gradually decreases toward the inner side, and the inner peripheral surface of the holder portion 19 and the above-mentioned inserted into the holder portion 19 are formed. Between the one end side outer peripheral surface of the pipe 20 and the inner peripheral surface of the holder portion 19, the outer peripheral surface of the insertion side distal end portion of the pipe 20 is substantially joined to the inner peripheral surface of the holder portion 19. A gradient clearance 34 is provided.
【００１６】このような構成において、ホルダ部１９の
内周面とパイプ２０の外周面との間には勾配クリアラン
ス３４が設けられると共に防振部材２１が介装されてい
るため、エンジン１から発生した振動がパイプ２０に直
接伝わる部分はホルダ部１９の内周面に接合するパイプ
２０の挿入側先端部のみであると共に防振部材２１によ
る減衰作用により、エンジン１からパイプ２０に伝わる
振動が減衰される。しかも、パイプ２０の挿入側先端部
の外周面とホルダ部１９の内周面とが接合することによ
り、パイプ２０に対するエンジン１側の自重による傾き
が発生してもその傾きは図３に示したように極僅かとな
り、また、エンジン１の運転時におけるパイプ２０に対
するエンジン１側の揺動が低減されると共にこの揺動に
基づく振動の誘発も低減される。従って、パイプ２０を
介して作業者に伝わる振動が極めて少なくなり、作業者
にとって良好な作業状態が得られる。In such a structure, since the gradient clearance 34 is provided between the inner peripheral surface of the holder portion 19 and the outer peripheral surface of the pipe 20, and the vibration damping member 21 is interposed, the engine 1 generates. The portion where the vibration is directly transmitted to the pipe 20 is only the front end portion of the insertion side of the pipe 20 which is joined to the inner peripheral surface of the holder portion 19, and the vibration transmitted from the engine 1 to the pipe 20 is attenuated by the damping action of the vibration isolator 21. To be done. Moreover, even if the outer peripheral surface of the tip end portion of the insertion side of the pipe 20 and the inner peripheral surface of the holder portion 19 are joined to each other, even if inclination due to the weight of the engine 1 side with respect to the pipe 20 occurs, the inclination is shown in FIG. Thus, the swing of the engine 1 side with respect to the pipe 20 during the operation of the engine 1 is reduced and the induction of the vibration based on this swing is also reduced. Therefore, the vibration transmitted to the worker through the pipe 20 is extremely reduced, and a good working condition for the worker can be obtained.
【００１７】つぎに、ホルダ部１９の内周面とパイプ２
０の外周面との間に勾配クリアランス３４が設けられて
いることにより、ホルダ部１９に対するパイプ２０の着
脱を容易に行なえる。さらに、嵌合凹部２２の内周部側
面とゴム部材２４の外周部側面との間に微小クリアラン
ス“Ｃ1 ”が設けられてるため、パイプ２０を着脱する
際に嵌合凹部２２と防振部材２１との間での引っ掛かり
が起こらず、ホルダ部１９に対するパイプ２０の着脱を
より一層容易に行なえる。しかも、パイプ２０をホルダ
部１９内に挿入する際には、防振部材２１と嵌合凹部２
２との位置を合わせるだけでよく、煩雑な位置合わせが
不要となる。Next, the inner peripheral surface of the holder portion 19 and the pipe 2
Since the gradient clearance 34 is provided between the outer peripheral surface of No. 0 and the outer peripheral surface of No. 0, the pipe 20 can be easily attached to and detached from the holder unit 19. Further, since a minute clearance “C 1 ” is provided between the inner peripheral side surface of the fitting concave portion 22 and the outer peripheral side surface of the rubber member 24, when the pipe 20 is attached or detached, the fitting concave portion 22 and the vibration isolating member are attached. The pipe 20 is not caught and the pipe 20 can be attached to and detached from the holder portion 19 more easily. Moreover, when the pipe 20 is inserted into the holder portion 19, the vibration damping member 21 and the fitting recess 2
It suffices to match the position with the position 2 and no complicated position alignment is required.
【００１８】一方、補強部材２３の端部とゴム部材２４
の外周部側面との間は小さな間隔“Ｃ2 ”に設定されて
いるため、エンジン１の運転時におけるゴム部材２４の
過大な変形や収縮が防止され、パイプ２０の周方向に対
するエンジン１の変位の発生が防止される。On the other hand, the end of the reinforcing member 23 and the rubber member 24
Since a small distance "C 2 " is set between the rubber member 24 and the outer peripheral side surface, excessive deformation and contraction of the rubber member 24 during the operation of the engine 1 are prevented, and the displacement of the engine 1 in the circumferential direction of the pipe 20 is prevented. Is prevented from occurring.
【００１９】また、ホルダ部１９はその内周部下方に嵌
合凹部２２を形成し、他の部分はパイプ２０より僅かに
太い形状となっているため、図５や図６に示した従来例
に比べてホルダ部１９の外径寸法が小さくなり、刈払機
全体の重量が軽減されると共に製造コストが低減され
る。Further, since the holder portion 19 has a fitting concave portion 22 formed below the inner peripheral portion thereof and the other portions are slightly thicker than the pipe 20, the conventional example shown in FIG. 5 and FIG. The outer diameter of the holder portion 19 is smaller than that of the above, and the weight of the brush cutter as a whole is reduced and the manufacturing cost is reduced.
【００２０】[0020]
【発明の効果】本発明は上述のように、エンジンとこの
エンジンからの動力を刈刃へ伝達する伝動軸とこの伝動
軸を覆う中空状のパイプとを有する刈払機において、前
記エンジン側に前記パイプの一端側が挿入されるホルダ
部を設け、前記パイプの一端側外周部の一部に防振部材
を取付けると共にこの防振部材が嵌合される嵌合凹部を
前記ホルダ部の内周部下方に形成し、前記ホルダ部の内
周面とこのホルダ部に挿入された前記パイプの一端側外
周面との間に前記ホルダ部の奥側に向かうにつれて次第
に狭くなると共に前記パイプの挿入側先端部の外周面が
前記ホルダ部の内周面に略接合する勾配クリアランスを
設けたので、エンジンから発生した振動のパイプへの伝
わりを、勾配クリアランスと防振部材とを設けた簡単な
構造によって減衰させることができ、しかも、ホルダ部
の内周面とパイプの一端側外周面との間のクリアランス
がホルダ部の奥側に向かうにつれて次第に狭くなる勾配
クリアランスであるため、ホルダ部に対するパイプの着
脱を簡単に行なうことができ、さらに、ホルダ部の奥側
まで挿入されたパイプの挿入側先端部の外周面とホルダ
部の内周面とが接合することにより、パイプに対するエ
ンジン側の自重による傾きや、エンジンの運転時におけ
るパイプに対するエンジン側の揺動を低減させると共に
この揺動に基づく振動の誘発を防止することができる等
の効果を有する。As described above, the present invention provides a brush cutter having an engine, a transmission shaft for transmitting power from the engine to a cutting blade, and a hollow pipe for covering the transmission shaft. A holder portion into which one end side of the pipe is inserted is provided, and a vibration isolating member is attached to a part of the outer peripheral portion on one end side of the pipe, and a fitting concave portion into which the vibration isolating member is fitted is formed below the inner peripheral portion of the holder portion. Formed between the inner peripheral surface of the holder portion and the outer peripheral surface on one end side of the pipe inserted into the holder portion, and becomes gradually narrower toward the inner side of the holder portion, and the tip end portion on the insertion side of the pipe is formed. Since the outer peripheral surface of the is provided with a gradient clearance that is substantially joined to the inner peripheral surface of the holder portion, the transmission of the vibration generated from the engine to the pipe is attenuated by the simple structure provided with the gradient clearance and the vibration isolating member. Moreover, since the clearance between the inner peripheral surface of the holder and the outer peripheral surface on one end side of the pipe is a gradient clearance that gradually narrows toward the back side of the holder, the pipe can be attached to and detached from the holder. This can be done easily, and furthermore, the outer peripheral surface of the insertion-side tip of the pipe inserted to the inner side of the holder portion and the inner peripheral surface of the holder portion are joined to each other, so that inclination due to the weight of the engine side with respect to the pipe and This has the effect of reducing the swing of the engine with respect to the pipe during operation of the engine, and preventing the vibration induced by this swing.
【図１】本発明の一実施例を示した縦断側面図である。FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.
【図２】図１におけるＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along line AA in FIG.
【図３】パイプに対してエンジン側が自重により傾いて
もその傾きが僅かであることを示した縦断側面図であ
る。FIG. 3 is a vertical cross-sectional side view showing that the engine side with respect to the pipe leans due to its own weight, but the lean is slight.
【図４】従来例及び本発明に係る刈払機の全体構成を示
した斜視図である。FIG. 4 is a perspective view showing an overall configuration of a brush cutter according to a conventional example and the present invention.
【図５】従来例を示した縦断側面図である。FIG. 5 is a vertical sectional side view showing a conventional example.
【図６】図５におけるＢ−Ｂ線断面図である。6 is a sectional view taken along line BB in FIG.
１ エンジン ６ 刈刃 ７ 伝動軸 １９ ホルダ部 ２１ 防振部材 ２２ 嵌合凹部 ３４ 勾配クリアランス DESCRIPTION OF SYMBOLS 1 Engine 6 Cutting blade 7 Transmission shaft 19 Holder part 21 Vibration damping member 22 Fitting concave part 34 Gradient clearance
───────────────────────────────────────────────────── フロントページの続き (72)発明者 寺内 正人 長野県松本市石芝１丁目１番１号 石川島 芝浦機械株式会社松本工場内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masato Terauchi 1-1-1 Ishishiba, Matsumoto City, Nagano Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Factory
Claims (1)
刃へ伝達する伝動軸とこの伝動軸を覆う中空状のパイプ
とを有する刈払機において、前記エンジン側に前記パイ
プの一端側が挿入されるホルダ部を設け、前記パイプの
一端側外周部の一部に防振部材を取付けると共にこの防
振部材が嵌合される嵌合凹部を前記ホルダ部の内周部下
方に形成し、前記ホルダ部の内周面とこのホルダ部に挿
入された前記パイプの一端側外周面との間に前記ホルダ
部の奥側に向かうにつれて次第に狭くなると共に前記パ
イプの挿入側先端部の外周面が前記ホルダ部の内周面に
略接合する勾配クリアランスを設けたことを特徴とする
刈払機の防振装置。1. A brush cutter having an engine, a transmission shaft for transmitting power from the engine to a cutting blade, and a hollow pipe covering the transmission shaft. A holder in which one end side of the pipe is inserted into the engine side. A pipe, a vibration damping member is attached to a part of the outer peripheral portion of the pipe on one end side, and a fitting recess into which the vibration damping member is fitted is formed below the inner peripheral portion of the holder portion. Between the inner peripheral surface and the outer peripheral surface on one end side of the pipe inserted into the holder portion, the width gradually becomes narrower toward the inner side of the holder portion, and the outer peripheral surface of the tip end on the insertion side of the pipe is the holder portion. An anti-vibration device for a bush cutter, which is provided with a gradient clearance that is substantially joined to the inner peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5175790A JP2999097B2 (en) | 1993-07-16 | 1993-07-16 | Brush cutter vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5175790A JP2999097B2 (en) | 1993-07-16 | 1993-07-16 | Brush cutter vibration isolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0734895A true JPH0734895A (en) | 1995-02-03 |
| JP2999097B2 JP2999097B2 (en) | 2000-01-17 |
Family
ID=16002301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5175790A Expired - Fee Related JP2999097B2 (en) | 1993-07-16 | 1993-07-16 | Brush cutter vibration isolator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2999097B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6845842B2 (en) * | 2001-11-30 | 2005-01-25 | Honda Giken Kogyo Kabushiki Kaisha | Vibration-proofing structure for hollow pipe for vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52154435U (en) * | 1976-05-20 | 1977-11-24 |
-
1993
- 1993-07-16 JP JP5175790A patent/JP2999097B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52154435U (en) * | 1976-05-20 | 1977-11-24 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6845842B2 (en) * | 2001-11-30 | 2005-01-25 | Honda Giken Kogyo Kabushiki Kaisha | Vibration-proofing structure for hollow pipe for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2999097B2 (en) | 2000-01-17 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19991019 |
|
| LAPS | Cancellation because of no payment of annual fees |