JPH0216585Y2 - - Google Patents
Info
- Publication number
- JPH0216585Y2 JPH0216585Y2 JP2756287U JP2756287U JPH0216585Y2 JP H0216585 Y2 JPH0216585 Y2 JP H0216585Y2 JP 2756287 U JP2756287 U JP 2756287U JP 2756287 U JP2756287 U JP 2756287U JP H0216585 Y2 JPH0216585 Y2 JP H0216585Y2
- Authority
- JP
- Japan
- Prior art keywords
- rod portion
- movable
- main rod
- spring
- rod
- 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
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013138 pruning Methods 0.000 description 1
Landscapes
- Harvester Elements (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、内部に駆動軸を配置した伸縮操作
桿、特に刈払機などに使用される伸縮操作桿に関
する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a telescoping operating rod having a drive shaft disposed therein, particularly to a telescoping operating rod used in a brush cutter or the like.
従来の技術
従来、このような伸縮操作桿には、一端を機体
に取付けた主桿部分と、該主桿部分の他端におい
てそれと入れ子式に軸線方向に移動して伸縮操作
桿全体の長さを変化し得る可動桿部分と、主桿部
分及び可動桿部分の内部を軸線方向に延びる伸縮
駆動軸と、主桿部分内に軸線方向に移動可能に配
置されて伸縮駆動軸を支持する可動軸受と、主桿
部分内に配置されて機体及び可動軸受の間に作用
するばねとで構成されているものがある。BACKGROUND ART Conventionally, such a telescoping control rod includes a main rod portion whose one end is attached to the aircraft body, and the other end of the main rod portion that moves in the axial direction in a nested manner with the main rod portion to extend the entire length of the telescoping control rod. a movable rod portion that can change the length of the rod, a telescoping drive shaft that extends in the axial direction inside the main rod portion and the movable rod portion, and a movable bearing that is disposed within the main rod portion so as to be movable in the axial direction and supports the telescoping drive shaft. and a spring disposed within the main rod portion and acting between the fuselage and the movable bearing.
考案が解決しようとする問題点
このような従来の技術では、伸縮操作桿の伸縮
操作時に可動軸受は、ばねの作用によつて駆動軸
に沿つて可動桿部分と一緒に移動するので、伸縮
操作桿の設定長さによつては、駆動軸が良好な支
持状態で支持されず、通常作業者が把持する主桿
部分にかなり大きな振動が発生するという欠点が
あつた。Problems to be Solved by the Invention In such conventional technology, when the telescopic operation rod is extended or retracted, the movable bearing moves together with the movable rod part along the drive shaft due to the action of the spring. Depending on the set length of the rod, the drive shaft may not be supported in a good manner, resulting in considerable vibrations occurring in the main rod portion that is normally held by the operator.
そこで、本考案はこのような従来の伸縮操作桿
の欠点を取除くと共に、簡単で便利な形の伸縮操
作桿を提供することを目的とする。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the drawbacks of the conventional telescopic operating rod and to provide a simple and convenient telescopic operating rod.
問題点を解決するための手段
即ち、本考案によれば、伸縮操作桿は、従来の
ばねに加えて、ほぼ同じばね力を有し、かつ、可
動桿部分及び可動軸受の間に作用する別のばねを
主桿部分内に設けた構成を特徴とする。Means for Solving the Problems Namely, according to the present invention, the telescoping operating rod has, in addition to the conventional spring, another spring having approximately the same spring force and acting between the movable rod portion and the movable bearing. It is characterized by a structure in which a spring is installed inside the main rod part.
作 用
従つて本考案の構成により、可動軸受は二つの
ばねによつて軸線方向の両側からほぼ同じ偏圧力
を受け、このため可動軸受は、伸縮操作桿の長さ
が変更されても、ほぼ最適の位置に保持される。Effects Therefore, with the configuration of the present invention, the movable bearing receives approximately the same biased pressure from both sides in the axial direction by the two springs, and therefore, even if the length of the telescopic operation rod is changed, the movable bearing will remain approximately unchanged. It is held in the optimum position.
実施例
次に、本考案を図面の実施例に基づいて説明す
る。Embodiments Next, the present invention will be described based on embodiments shown in the drawings.
本実施例は、本考案を刈払機の伸縮操作桿に適
用した例であり、この伸縮操作桿は、細長い中空
の主桿部分１及び可動桿部分２を有しており、前
記主桿部分１はその一端部１０において図示しな
い原動機を含む機体３に固定されている。前記可
動桿部分２は、前記主桿部分１の内径よりやや小
さい外径を有していて、その一端部１２から前記
主桿部分１の他端部１１内へ入れ子式に嵌入して
おり、主桿部分１と同心状にかつ主桿部分１に対
して軸線方向に移動可能に配置されて伸縮操作桿
全体の長さを変化し得るようになつている。更
に、主桿部分１及び可動桿部分２は締付スリーブ
４によつて互いに連結されており、該締付スリー
ブ４は主桿部分１の他端部１１とテーパーねじで
螺合し、締付スリーブ４を回転して可動桿部分２
との係合を緩め、可動桿部分２を主桿部分１に対
して軸線方向へ適当に移動させ、締付スリーブ４
を回転して締付け、可動桿部分２を主桿部分１に
対して移動不能に固定し、このようにして伸縮操
作桿全体の長さを調節し得るようになつている。
この桿部分１及び２の固定構造は従来知られてい
るものを適宜採用し得る。 This embodiment is an example in which the present invention is applied to a telescopic operating rod of a brush cutter, and this telescopic operating rod has an elongated hollow main rod portion 1 and a movable rod portion 2. is fixed at one end 10 to the fuselage 3 including a prime mover (not shown). The movable rod portion 2 has an outer diameter slightly smaller than the inner diameter of the main rod portion 1, and is nested into the other end 11 of the main rod portion 1 from one end 12 thereof, It is arranged concentrically with the main rod portion 1 and movable in the axial direction with respect to the main rod portion 1, so that the length of the entire telescopic operation rod can be changed. Furthermore, the main rod portion 1 and the movable rod portion 2 are connected to each other by a tightening sleeve 4, which is screwed onto the other end 11 of the main rod portion 1 with a tapered screw, and is tightened. Rotate the sleeve 4 and move the movable rod part 2
Loosen the engagement with the main rod portion 1, move the movable rod portion 2 appropriately in the axial direction with respect to the main rod portion 1, and tighten the tightening sleeve 4.
is rotated and tightened to immovably fix the movable rod portion 2 to the main rod portion 1, thus making it possible to adjust the length of the entire telescopic operation rod.
For the fixing structure of the rod portions 1 and 2, any conventionally known structure may be adopted as appropriate.
前記主桿部分１及び可動桿部分２内にスプライ
ン嵌合等により伸縮自在な回転駆動軸５が長手方
向に同心状に延びており、該回転駆動軸５は、一
端１３において機体３に軸受６を介して回転可能
に支持されており、かつ、機体３内に設けられた
内燃機関などのような原動機（図示せず）からの
駆動力によつて回転駆動される。前記回転駆動軸
５の図示しない他端は可動桿部分２の他端部即ち
先端部において切断装置に連結されていて、作業
者が伸縮操作桿を操作して草刈り作業や立木の枝
打ち作業等を行なうことができるようになつてい
る。 A rotary drive shaft 5, which is extendable and retractable by spline fitting or the like, extends concentrically in the longitudinal direction within the main rod portion 1 and the movable rod portion 2. It is rotatably supported via the fuselage body 3 and is rotationally driven by a driving force from a prime mover (not shown) such as an internal combustion engine provided within the fuselage body 3. The other end (not shown) of the rotary drive shaft 5 is connected to a cutting device at the other end, that is, the tip end of the movable rod portion 2, and the operator operates the telescopic operation rod to perform grass mowing work, pruning of standing trees, etc. I am now able to do it.
更に、前記回転駆動軸５は、主桿部分１内にお
いては可動軸受７によつて支持されている。該可
動軸受７は、その外周面において主桿部分１の内
周面に接触し、主桿部分１に対して軸線方向へ摺
動し得るように配置されている。更に、主桿部分
１内には、前記機体３と可動軸受７との間に作用
する第一の圧縮コイルばね８が回転駆動軸５と同
心状に配置されており、該第一のばね８は前記可
動軸受７を図面をみて右方へ偏圧している。同様
に、前記可動桿部分２の一端部１２と可動軸受７
との間に作用する第二の圧縮コイルばね９が主桿
部分１内に同心状に配置されており、第二のばね
９は可動軸受７を図面をみて左方へ偏圧してい
る。第一のばね８及び第二のばね９は互いにほぼ
同じばね力を有しており、可動軸受７に対してほ
ぼ同じ偏圧力を軸線方向反対側から加えるように
なつている。このため、前記したようにして可動
桿部分２が主桿部分１に対して軸線方向位置を変
化させると、前記ばね８及び９は互いにほぼ同じ
量だけ伸縮して可動軸受７を常に主桿部分１内で
機体３側と可動桿部分２の一端部１２との中間に
保持し、回転駆動軸５を振動発生の少ない最適位
置で支持する。なお、圧縮ばね８及び９の代わり
に引張ばねを用いることも可能である。 Further, the rotary drive shaft 5 is supported within the main rod portion 1 by a movable bearing 7. The movable bearing 7 is arranged so that its outer circumferential surface contacts the inner circumferential surface of the main rod portion 1 and can slide relative to the main rod portion 1 in the axial direction. Furthermore, within the main rod portion 1, a first compression coil spring 8 acting between the body 3 and the movable bearing 7 is arranged concentrically with the rotary drive shaft 5. The movable bearing 7 is biased to the right when viewed from the drawing. Similarly, one end 12 of the movable rod portion 2 and the movable bearing 7
A second compression coil spring 9 acting between the main rod portion 1 is arranged concentrically, and biases the movable bearing 7 to the left in the drawing. The first spring 8 and the second spring 9 have substantially the same spring force and apply substantially the same biased pressure to the movable bearing 7 from opposite sides in the axial direction. Therefore, when the movable rod portion 2 changes its axial position with respect to the main rod portion 1 as described above, the springs 8 and 9 expand and contract by approximately the same amount to keep the movable bearing 7 always in the main rod portion. 1 between the body 3 side and one end 12 of the movable rod portion 2, and supports the rotary drive shaft 5 at an optimal position where less vibration is generated. Note that it is also possible to use tension springs instead of the compression springs 8 and 9.
また、コイルばねの巻き方向を、駆動軸５の回
転方向と逆にせしめれば、作業中、ばねが主桿部
分の内周面に密着して、ばねの乱れが防止でき好
適である。 Furthermore, it is preferable to wind the coil spring in the opposite direction to the direction of rotation of the drive shaft 5, since the spring will come into close contact with the inner circumferential surface of the main rod portion during operation, thereby preventing disturbance of the spring.
考案の効果
以上説明した本考案の構成により、本考案は伸
縮操作桿の伸縮に対して、可動軸受は常に主桿部
分の中間位置において駆動軸を支持し、大きな振
動の発生を押えることかできるという効果を奏す
る。Effects of the invention With the structure of the invention explained above, the movable bearing always supports the drive shaft at the intermediate position of the main rod part as the telescoping operation rod expands and contracts, thereby suppressing the occurrence of large vibrations. This effect is achieved.
図面は本考案に係る伸縮操作桿の一実施例を示
す要部断面図である。
１……主桿部分、２……可動桿部分、３……機
体、５……伸縮駆動軸、７……可動軸受、８……
第一のばね、９……第二のばね。
The drawing is a sectional view of essential parts showing an embodiment of the telescopic operation stick according to the present invention. 1... Main rod part, 2... Movable rod part, 3... Body, 5... Telescopic drive shaft, 7... Movable bearing, 8...
First spring, 9... second spring.
Claims (1)
部分の他端においてそれと入れ子式に軸線方向に
移動して伸縮操作桿全体の長さを変化し得る可動
桿部分２と、前記主桿部分及び可動桿部分の内部
を軸線方向に延びる伸縮駆動軸５と、前記主桿部
分内に軸線方向に移動可能に配置されて前記伸縮
駆動軸を支持する可動軸受７と、前記主桿部分内
に配置されて前記機体及び前記可動軸受の間に作
用する第一のばね８とを有する伸縮操作桿におい
て、前記第一のばね８とほぼ同じばね力を有しか
つ前記可動桿部分及び前記可動軸受の間に作用す
る第二のばね９を前記主桿部分内に設けたことを
特徴とする伸縮操作桿。 A main rod part 1 whose one end is attached to the body 3, a movable rod part 2 which can move in the axial direction in a telescoping manner with the main rod part at the other end of the main rod part to change the length of the entire telescopic operation rod; A telescoping drive shaft 5 extending in the axial direction inside the rod portion and the movable rod portion, a movable bearing 7 disposed movably in the axial direction within the main rod portion and supporting the telescoping drive shaft, and the main rod portion. a telescopic operating rod having a first spring 8 disposed within the body and acting between the body and the movable bearing, the telescopic operating rod having substantially the same spring force as the first spring 8 and having a spring force substantially equal to that of the first spring 8 and A telescopic operating rod characterized in that a second spring 9 acting between movable bearings is provided within the main rod portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2756287U JPH0216585Y2 (en) | 1987-02-26 | 1987-02-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2756287U JPH0216585Y2 (en) | 1987-02-26 | 1987-02-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63134625U JPS63134625U (en) | 1988-09-02 |
| JPH0216585Y2 true JPH0216585Y2 (en) | 1990-05-08 |
Family
ID=30829714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2756287U Expired JPH0216585Y2 (en) | 1987-02-26 | 1987-02-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0216585Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5692564B2 (en) * | 2010-03-25 | 2015-04-01 | 日立工機株式会社 | Brush cutter and power transmission mechanism |
| JP5737511B2 (en) * | 2011-06-22 | 2015-06-17 | 株式会社大成モナック | Working machine |
| JP7219686B2 (en) * | 2019-09-12 | 2023-02-08 | 株式会社マキタ | Support pole and work machine |
-
1987
- 1987-02-26 JP JP2756287U patent/JPH0216585Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63134625U (en) | 1988-09-02 |
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