JPH04106926U - Brush cutter transmission shaft structure - Google Patents
Brush cutter transmission shaft structureInfo
- Publication number
- JPH04106926U JPH04106926U JP1579391U JP1579391U JPH04106926U JP H04106926 U JPH04106926 U JP H04106926U JP 1579391 U JP1579391 U JP 1579391U JP 1579391 U JP1579391 U JP 1579391U JP H04106926 U JPH04106926 U JP H04106926U
- Authority
- JP
- Japan
- Prior art keywords
- transmission shaft
- fiber layer
- fiber
- brush cutter
- cutting blade
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 84
- 239000000835 fiber Substances 0.000 claims abstract description 44
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims abstract description 11
- 239000011151 fibre-reinforced plastic Substances 0.000 claims abstract description 11
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 239000012779 reinforcing material Substances 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 4
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 4
- 244000025254 Cannabis sativa Species 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 102220033831 rs145989498 Human genes 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Harvester Elements (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
(57)【要約】
【目的】 刈払機の軽量化と振動の低減とを図る。
【構成】 原動機から刈刃へ動力を伝達する伝動軸１６
を繊維強化プラスチックにより形成し、この伝動軸１６
の外層部に伝動軸長手方向に対して略４５゜に繊維を配
向した４５゜繊維層１８を設け、伝動軸１６の端部に非
円形形状の継手部１９を形成し、４５゜繊維層１８をそ
の内周部が前記継手部１９に内接する円内において周方
向にそって連続するように設けた。また、伝動軸に中空
部を形成し、前記伝動軸の端部における前記中空部内に
補強材を挿入固定した。
(57) [Summary] [Purpose] To reduce the weight and vibration of a brush cutter. [Configuration] Transmission shaft 16 that transmits power from the prime mover to the cutting blade
is made of fiber-reinforced plastic, and this transmission shaft 16
A 45° fiber layer 18 in which fibers are oriented approximately 45° with respect to the longitudinal direction of the transmission shaft is provided on the outer layer of the transmission shaft 16, a non-circular joint portion 19 is formed at the end of the transmission shaft 16, and the 45° fiber layer 18 was provided so that its inner circumferential portion was continuous along the circumferential direction within a circle inscribed in the joint portion 19. Further, a hollow portion was formed in the transmission shaft, and a reinforcing material was inserted and fixed into the hollow portion at the end of the transmission shaft.
Description
【０００１】0001
本考案は、原動機とこの原動機により駆動される刈刃とを有する刈払機の伝動 軸構造に関する。 The present invention provides a power transmission for a brush cutter having a prime mover and a cutting blade driven by the prime mover. Regarding shaft structure.
【０００２】0002
従来、この種の刈払機の伝動軸としては、鋼製の中実軸が広く使用されている 。しかし、近年、刈払機使用者の高齢化や婦人化に伴って刈払機の軽量化と振動 の低減化とが望まれており、鋼製の中実軸に代わって鋼製の中空軸が使用される 傾向にある。さらに、より一層の軽量化や振動低減化を図るため、繊維強化プラ スチック製の伝動軸が開発されている。 Traditionally, solid steel shafts have been widely used as transmission shafts for this type of brush cutter. . However, in recent years, as brush cutter users have become older and more female, the lighter weight of brush cutters and vibrations have increased. There is a desire to reduce the There is a tendency. Furthermore, in order to further reduce weight and reduce vibration, fiber-reinforced plastic was used. A transmission shaft made of stick has been developed.
【０００３】 ここで、既に開発されている繊維強化プラスチック製の伝動軸の構造を図５乃 至図７に基づいて説明する。まず、この伝動軸１は、伝動軸長手方向に対して平 行に繊維を配向した内層部の繊維層（０゜繊維層）２と、伝動軸長手方向に対し て略４５゜に繊維を配向した外層部の繊維層（４５゜繊維層）３とから構成され ている。なお、０゜繊維層２は、伝動軸１に伝動軸長手方向の曲げ強度を与え、 ４５゜繊維層３は伝動軸１にねじり強度を与えるものであり、曲げ強度よりねじ り強度が要求されるこのような伝動軸１においては、４５゜繊維層３が外層部に 形成されている。また、０゜繊維層２と４５゜繊維層３との割合は、要求強度に 応じて適宜設定されている。0003 Here, the structure of the transmission shaft made of fiber-reinforced plastic that has already been developed is shown in Figure 5. This will be explained based on FIG. First, this transmission shaft 1 is flat with respect to the longitudinal direction of the transmission shaft. The inner fiber layer (0° fiber layer) 2 with fibers oriented in rows and the longitudinal direction of the transmission shaft It is composed of an outer fiber layer (45° fiber layer) 3 in which the fibers are oriented at approximately 45°. ing. Note that the 0° fiber layer 2 gives the transmission shaft 1 bending strength in the longitudinal direction of the transmission shaft, The 45° fiber layer 3 provides torsional strength to the transmission shaft 1, and the bending strength In such a power transmission shaft 1 that requires high strength, the 45° fiber layer 3 is It is formed. In addition, the ratio of the 0° fiber layer 2 and the 45° fiber layer 3 is determined according to the required strength. The settings are set accordingly.
【０００４】 つぎに、伝動軸１の端部には、この伝動軸１を駆動部や被駆動部と連結するた めの非円形形状の継手部４が形成されている。0004 Next, at the end of the transmission shaft 1, there is a A joint portion 4 having a non-circular shape is formed.
【０００５】[0005]
継手部４を形成する際において、図６及び図７に示すように４５゜繊維層３が 大きく削り取られた状態となる。このため、継手部４におけるねじり強度が低下 し、トルク伝達効率が大きく低下するとともに必要トルク値より小さなトルク値 で破壊を起こすという欠点がある。 When forming the joint part 4, as shown in FIGS. 6 and 7, the 45° fiber layer 3 is It is in a state where it has been largely removed. Therefore, the torsional strength at the joint portion 4 decreases. However, the torque transmission efficiency is greatly reduced and the torque value is smaller than the required torque value. It has the disadvantage of causing destruction.
【０００６】 また、図８に示すように、金属製の継手部材５を設け、この継手部材５を伝動 軸１の端部に接着したものもあるが、継手部材５を別個に形成するためにコスト 高となり、しかも、接着部の信頼性が十分に得られないという欠点がある。[0006] Further, as shown in FIG. 8, a metal joint member 5 is provided, and this joint member 5 is used for transmission. Although there is one that is glued to the end of the shaft 1, the cost is high because the joint member 5 is formed separately. Moreover, there is a drawback that the reliability of the bonded portion cannot be sufficiently obtained.
【０００７】[0007]
一端に原動機を連結するとともに他端に刈刃を保持した保持ケースを連結した 中空状の連結部材を設け、前記原動機から前記刈刃へ動力を伝達する伝動軸を前 記連結部材内に配設するとともにこの伝動軸を繊維強化プラスチックにより形成 した刈払機において、前記伝動軸の外層部に伝動軸長手方向に対して略４５゜に 繊維を配向した４５゜繊維層を設け、前記伝動軸の端部に非円形形状の継手部を 形成し、前記４５゜繊維層をその内周部が前記継手部に内接する円内において周 方向にそって連続するように設けた。 The prime mover is connected to one end, and the holding case that holds the cutting blade is connected to the other end. A hollow connecting member is provided, and a transmission shaft that transmits power from the prime mover to the cutting blade is connected to the front. This transmission shaft is made of fiber-reinforced plastic. In the brush cutter, the outer layer of the transmission shaft has an angle of about 45° with respect to the longitudinal direction of the transmission shaft. A 45° fiber layer with oriented fibers is provided, and a non-circular joint portion is provided at the end of the transmission shaft. forming the 45° fiber layer in a circle whose inner circumferential portion is inscribed in the joint portion. They were arranged so that they were continuous along the direction.
【０００８】 また、伝動軸に中空部を形成し、前記伝動軸の端部における前記中空部内に補 強材を挿入固定した。[0008] Further, a hollow portion is formed in the transmission shaft, and the hollow portion is filled in the end portion of the transmission shaft. Reinforcing material was inserted and fixed.
【０００９】[0009]
伝動軸の端部に非円形形状の継手部を形成した際において、４５゜繊維層はそ の内周部が継手部に内接する円内において連続しているため、４５゜繊維層は継 手部においても十分な厚さ寸法が確保され、伝動軸は継手部においても十分なね じり強度が確保される。 When forming a non-circular joint at the end of the transmission shaft, the 45° fiber layer Since the inner circumference of the 45° fiber layer is continuous within the circle inscribed in the joint, the 45° fiber layer Sufficient thickness is ensured at the hand, and the transmission shaft has sufficient thickness at the joint. Stiffness is ensured.
【００１０】 伝動軸に中空部を形成することにより伝動軸がさらに軽量化され、さらに、伝 動軸の端部における中空部内に補強材を挿入固定することにより、伝動軸の端部 における継手部において伝動軸長手方向に対する十分な曲げ強度が確保される。0010 By forming a hollow part in the transmission shaft, the transmission shaft is further reduced in weight, and By inserting and fixing reinforcing material into the hollow part at the end of the power transmission shaft, Sufficient bending strength in the longitudinal direction of the transmission shaft is ensured at the joint portion.
【００１１】[0011]
本考案の第一の実施例を図１乃至図３に基づいて説明する。中空状の連結杆６ の一端には原動機７が連結され、連結杆６の他端には保持ケースであるギヤケー ス８が連結されている。なお、このギヤケース８内には入力軸９とこの入力軸９ に連結された刈刃軸１０とが収納保持されており、刈刃軸１０の先端部には刈刃 １１が連結されている。また、前記連結杆６の前記ギヤケース８に近接した位置 には安全カバー１２が固定され、前記連結杆６の前記原動機７側にはハンドル１ ３が位置調節自在に取付けられている。 A first embodiment of the present invention will be described based on FIGS. 1 to 3. Hollow connecting rod 6 A motor 7 is connected to one end, and a gear case, which is a holding case, is connected to the other end of the connecting rod 6. 8 are connected. In addition, inside this gear case 8, there is an input shaft 9 and this input shaft 9. A cutting blade shaft 10 connected to the cutting blade shaft 10 is housed and held, and a cutting blade is attached to the tip of the cutting blade shaft 10. 11 are connected. Further, a position of the connecting rod 6 close to the gear case 8 A safety cover 12 is fixed to the connecting rod 6, and a handle 1 is attached to the motor 7 side of the connecting rod 6. 3 is attached so that its position can be adjusted freely.
【００１２】 つぎに、前記連結杆６内には複数個の軸受ホルダ１４が圧入されており、これ らの軸受ホルダ１４にはそれぞれ軸受１５が保持されている。そして、前記連結 杆６内に前記原動機７から前記刈刃１１へ動力を伝達する繊維強化プラスチック である炭素繊維強化プラスチック製の伝動軸１６が配設され、この伝動軸１６は 前記軸受１５により回転自在に保持されている。0012 Next, a plurality of bearing holders 14 are press-fitted into the connecting rod 6. A bearing 15 is held in each of the bearing holders 14 . And the connection Fiber-reinforced plastic that transmits power from the prime mover 7 to the cutting blade 11 in the rod 6 A transmission shaft 16 made of carbon fiber reinforced plastic is disposed, and this transmission shaft 16 is It is rotatably held by the bearing 15.
【００１３】 前記伝動軸１６は、図５乃至図７において説明した伝動軸１と同様に、伝動軸 長手方向に対して平行に繊維を配向した内層部の繊維層（０゜繊維層）１７と、 伝動軸長手方向に対して略４５゜に繊維を配向した外層部の繊維層（４５゜繊維 層）１８とから構成されている。ここで、前記伝動軸１６の端部には、前記４５ ゜繊維層１８の外周部の一部を削り取ることにより非円形形状の継手部１９が形 成されており、前記４５゜繊維層１８はその内周部が前記継手部１９に内接する 円内において周方向にそって連続するように設けられている。従って、前記４５ ゜繊維層１８は前記継手部１９においても十分な厚さ寸法が確保されている。[0013] The transmission shaft 16 is similar to the transmission shaft 1 described in FIGS. 5 to 7. an inner fiber layer (0° fiber layer) 17 in which fibers are oriented parallel to the longitudinal direction; The outer fiber layer has fibers oriented at approximately 45° with respect to the longitudinal direction of the transmission shaft (45° fiber layer) 18. Here, at the end of the transmission shaft 16, the 45 ゜A non-circular joint portion 19 is formed by scraping off a part of the outer periphery of the fiber layer 18. The inner peripheral portion of the 45° fiber layer 18 is inscribed in the joint portion 19. They are provided so as to be continuous along the circumferential direction within the circle. Therefore, the above 45 The fiber layer 18 has a sufficient thickness at the joint portion 19 as well.
【００１４】 そして、前記伝動軸１６の一端に形成された一方の継手部１９が前記原動機７ の出力軸２０に形成された四角穴部２１に嵌合され、前記伝動軸１６の他端に形 成された他方の継手部１９が前記入力軸９に形成された四角穴部２２に嵌合され ている。[0014] One joint portion 19 formed at one end of the transmission shaft 16 is connected to the prime mover 7. The other end of the transmission shaft 16 is fitted into a square hole 21 formed in the output shaft 20 of the transmission shaft 16. The other joint portion 19 formed is fitted into the square hole portion 22 formed in the input shaft 9. ing.
【００１５】 このような構成において、原動機７を始動させると原動機７からの動力が伝動 軸１６を介して刈刃１１に伝達され、刈刃１１の回転により草等の刈払作業が行 われる。[0015] In such a configuration, when the prime mover 7 is started, the power from the prime mover 7 is transmitted. The power is transmitted to the cutting blade 11 via the shaft 16, and the rotation of the cutting blade 11 performs cutting work of grass, etc. be exposed.
【００１６】 ここで、伝動軸１６は炭素繊維強化プラスチックで形成されており、従来の鋼 製の伝動軸に比べて大幅な軽量化が図られている。具体的には、全長１５００mm 、外径６mmのＳ４８Ｃ製の伝動軸の重量は約３３８ｇであり、同じサイズの炭素 繊維強化プラスチック製の伝動軸１６では約７０ｇであり、約８０％の軽量化と なる。そして、この軽量化に伴って刈払機の取扱性が容易になり、高齢者や婦人 であっても簡単に草刈作業を行えるようになる。また、炭素繊維強化プラスチッ ク等の繊維強化プラスチックは振動を減衰させる振動減衰特性に優れており、さ らに、伝動軸１６自体の軽量化によっても振動が低減されるため、刈払作業時に おいて作業者の疲労が軽減される。[0016] Here, the transmission shaft 16 is made of carbon fiber reinforced plastic, and is made of conventional steel. The weight is significantly reduced compared to the manufactured transmission shaft. Specifically, the total length is 1500mm. The weight of the transmission shaft made of S48C with an outer diameter of 6 mm is approximately 338 g, and the weight of the transmission shaft made of S48C with an outer diameter of 6 mm is approximately 338 g, and the weight of the transmission shaft made of S48C with an outer diameter of 6 mm is approximately 338 g. The weight of the transmission shaft 16 made of fiber-reinforced plastic is approximately 70g, which is approximately 80% lighter. Become. This lighter weight also makes the brush cutter easier to handle, making it easier for elderly people and women to use. Even if you do, you can easily mow the grass. In addition, carbon fiber reinforced plastic Fiber-reinforced plastics such as In addition, vibration is reduced by reducing the weight of the transmission shaft 16 itself, so it is easier to use when cutting grass. This reduces worker fatigue.
【００１７】 一方、４５゜繊維層１８の外周部の一部を削り取ることにより非円形形状の継 手部１９を形成した際において、４５゜繊維層１８の内周部が継手部１９に内接 する円内において周方向にそって連続するように設けられているため、継手部１ ９においても４５゜繊維層１８は十分な厚さ寸法が確保されるとともに伝動軸１ ６はこの継手部１９において十分なねじり強度が確保され、十分なトルク伝達を 行える。[0017] On the other hand, by scraping off a part of the outer periphery of the 45° fiber layer 18, a non-circular joint can be formed. When forming the hand portion 19, the inner peripheral portion of the 45° fiber layer 18 is inscribed in the joint portion 19. Since the joint part 1 is provided so as to be continuous along the circumferential direction within the circle 9, the 45° fiber layer 18 has a sufficient thickness dimension, and the transmission shaft 1 6 ensures sufficient torsional strength in this joint portion 19 and ensures sufficient torque transmission. I can do it.
【００１８】 また、伝動軸１６は一体構造であるために製造コストが安くなり、図７に示し たような接着が不要であるために動力伝達の信頼性が向上する。[0018] In addition, since the transmission shaft 16 has an integral structure, manufacturing costs are reduced, and as shown in FIG. Since such adhesives are not required, the reliability of power transmission is improved.
【００１９】 ついで、本考案の第二の実施例を図４に基づいて説明する。なお、図１乃至図 ３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。本実施 例は、伝動軸１６における０゜繊維層１７の中央部に伝動軸１６の長手方向にそ って中空部２３が形成されている。さらに、前記伝動軸１６の端部における前記 中空部２３内には補強材２４が挿入固定されている。[0019] Next, a second embodiment of the present invention will be described based on FIG. 4. In addition, Figs. The same parts as those explained in 3 are indicated by the same reference numerals, and the explanation will be omitted. Main implementation In this example, the 0° fiber layer 17 of the transmission shaft 16 has a 0° Thus, a hollow portion 23 is formed. Furthermore, the above at the end of the transmission shaft 16 A reinforcing member 24 is inserted and fixed into the hollow portion 23.
【００２０】 このような構成において、中空部２３を形成することにより製造時における伝 動軸１６の曲がりが防止され、さらに、伝動軸１６がより一層軽量化される。ま た、中空部２３内に補強材２４を挿入固定することにより、伝動軸１６の継手部 １９の強度低下が防止される。[0020] In such a configuration, forming the hollow portion 23 reduces transmission during manufacturing. The bending of the driving shaft 16 is prevented, and the weight of the transmission shaft 16 is further reduced. Ma In addition, by inserting and fixing the reinforcing material 24 into the hollow part 23, the joint part of the transmission shaft 16 is 19 strength reduction is prevented.
【００２１】 なお、前記第一及び第二の実施例においては、伝動軸１６の素材である繊維強 化プラスチックとして炭素繊維強化プラスチックについて説明したが、ボロン繊 維強化プラスチックやケブラー繊維強化プラスチック等でもよい。[0021] In addition, in the first and second embodiments, the fiber reinforced material that is the material of the transmission shaft 16 is We have explained carbon fiber reinforced plastic as a synthetic plastic, but boron fiber Fiber-reinforced plastics, Kevlar fiber-reinforced plastics, etc. may also be used.
【００２２】[0022]
本考案は、上述のように原動機から刈刃へ動力を伝達する繊維強化プラスチッ ク製の伝動軸の外層部に伝動軸長手方向に対して略４５゜に繊維を配向した４５ ゜繊維層を設け、伝動軸の端部に非円形形状の継手部を形成するとともに４５゜ 繊維層の内周部を継手部に内接する円内において周方向にそって連続するように 設けたことにより、伝動軸の端部に継手部を形成した後においてもこの継手部に おいては４５゜繊維層が十分な厚さ寸法を確保されているため、継手部において も十分なねじり強度を確保することができるとともに動力伝達を確実に行わせる ことができ、さらに、伝動軸に中空部を形成することによって伝動軸及び刈払機 のより一層の軽量化を図ることができるとともに伝動軸の製造時における伝動軸 の曲がりを防止することができ、また、伝動軸の端部における中空部内に補強材 を挿入固定することにより十分な強度を確保することができる等の効果を要する 。 As mentioned above, this invention uses fiber-reinforced plastic to transmit power from the prime mover to the cutting blade. The outer layer of the transmission shaft made of aluminum has fibers oriented approximately 45 degrees with respect to the longitudinal direction of the transmission shaft. A fiber layer is provided, a non-circular joint is formed at the end of the transmission shaft, and a 45° The inner periphery of the fiber layer is continuous along the circumferential direction within the circle inscribed in the joint. By providing this, even after the joint is formed at the end of the transmission shaft, the joint Since the 45° fiber layer has a sufficient thickness in the joint, It also ensures sufficient torsional strength and ensures reliable power transmission. Furthermore, by forming a hollow part in the transmission shaft, the transmission shaft and brush cutter can be In addition to further reducing the weight of the transmission shaft, There is also a reinforcing material inside the hollow part at the end of the transmission shaft. By inserting and fixing, sufficient strength can be ensured. .
【図１】本考案の第一の実施例を示すもので、同図
（ａ）は縦断正面図、同図（ｂ）はそのＡ−Ａ線断面図
である。FIG. 1 shows a first embodiment of the present invention, and FIG. 1(a) is a longitudinal sectional front view, and FIG. 1(b) is a sectional view taken along the line A-A.
【図２】刈払機の全体を示す斜視図である。FIG. 2 is a perspective view showing the entire brush cutter.
【図３】刈払機における動力伝達部の構造を示す縦断正
面図である。FIG. 3 is a longitudinal sectional front view showing the structure of a power transmission section in the brush cutter.
【図４】本考案の第二の実施例を示すもので、同図
（ａ）は縦断正面図、同図（ｂ）はそのＢ−Ｂ線断面図
である。FIG. 4 shows a second embodiment of the present invention, in which FIG. 4(a) is a longitudinal sectional front view, and FIG. 4(b) is a sectional view taken along line B-B.
【図５】従来例の伝動軸を示す斜視図である。FIG. 5 is a perspective view showing a conventional power transmission shaft.
【図６】従来例の伝動軸を示す縦断正面図である。FIG. 6 is a longitudinal sectional front view showing a conventional power transmission shaft.
【図７】図６におけるＣ−Ｃ線断面図である。7 is a sectional view taken along line CC in FIG. 6. FIG.
【図８】他の従来例の伝動軸と継手部とを示す縦断正面
図である。FIG. 8 is a longitudinal sectional front view showing a power transmission shaft and a joint portion of another conventional example.
６ 連結部材 ７ 原動機 ８ 保持ケース １１ 刈刃 １６ 伝動軸 １８ ４５゜繊維層 １９ 継手部 ２３ 中空部 ２４ 補強材 6 Connecting member 7 Prime mover 8 Holding case 11 Cutting blade 16 Transmission shaft 18 45° fiber layer 19 Joint part 23 Hollow part 24 Reinforcement material
Claims (2)
刈刃を保持した保持ケースを連結した中空状の連結部材
を設け、前記原動機から前記刈刃へ動力を伝達する伝動
軸を前記連結部材内に配設するとともにこの伝動軸を繊
維強化プラスチックにより形成した刈払機において、前
記伝動軸の外層部に伝動軸長手方向に対して略４５゜に
繊維を配向した４５゜繊維層を設け、前記伝動軸の端部
に非円形形状の継手部を形成し、前記４５゜繊維層をそ
の内周部が前記継手部に内接する円内において周方向に
そって連続するように設けたことを特徴とする刈払機の
伝動軸構造。Claim 1: A hollow connecting member is provided that connects a prime mover to one end and a holding case holding a cutting blade to the other end, and a transmission shaft that transmits power from the prime mover to the cutting blade is connected to the connecting member. In a brush cutter in which the transmission shaft is made of fiber-reinforced plastic, a 45° fiber layer in which fibers are oriented at approximately 45° with respect to the longitudinal direction of the transmission shaft is provided on the outer layer of the transmission shaft, and the A non-circular joint part is formed at the end of the transmission shaft, and the 45° fiber layer is provided so that the inner peripheral part thereof is continuous along the circumferential direction within a circle inscribed in the joint part. Transmission shaft structure of a brush cutter.
端部における前記中空部内に補強材を挿入固定したこと
を特徴とする請求項１記載の刈払機の伝動軸構造。2. The transmission shaft structure for a brush cutter according to claim 1, wherein a hollow portion is formed in the transmission shaft, and a reinforcing member is inserted and fixed into the hollow portion at an end of the transmission shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991015793U JP2530571Y2 (en) | 1991-02-25 | 1991-02-25 | Transmission shaft structure of brush cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991015793U JP2530571Y2 (en) | 1991-02-25 | 1991-02-25 | Transmission shaft structure of brush cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04106926U true JPH04106926U (en) | 1992-09-16 |
| JP2530571Y2 JP2530571Y2 (en) | 1997-03-26 |
Family
ID=31902921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991015793U Expired - Lifetime JP2530571Y2 (en) | 1991-02-25 | 1991-02-25 | Transmission shaft structure of brush cutter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2530571Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100862060B1 (en) * | 2007-04-10 | 2008-10-09 | 류충오 | Composite drive shaft manufacturing mold and composite drive shaft manufactured using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57107419A (en) * | 1980-10-31 | 1982-07-03 | Fuibaa Mekanitsukusu Ab | Transmitting device |
| JPS6257627U (en) * | 1985-09-27 | 1987-04-09 | ||
| JPS6368723U (en) * | 1986-10-27 | 1988-05-09 |
-
1991
- 1991-02-25 JP JP1991015793U patent/JP2530571Y2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57107419A (en) * | 1980-10-31 | 1982-07-03 | Fuibaa Mekanitsukusu Ab | Transmitting device |
| JPS6257627U (en) * | 1985-09-27 | 1987-04-09 | ||
| JPS6368723U (en) * | 1986-10-27 | 1988-05-09 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2530571Y2 (en) | 1997-03-26 |
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