JPS624084B2 - - Google Patents
Info
- Publication number
- JPS624084B2 JPS624084B2 JP3606182A JP3606182A JPS624084B2 JP S624084 B2 JPS624084 B2 JP S624084B2 JP 3606182 A JP3606182 A JP 3606182A JP 3606182 A JP3606182 A JP 3606182A JP S624084 B2 JPS624084 B2 JP S624084B2
- Authority
- JP
- Japan
- Prior art keywords
- movable blade
- blade
- protrusion
- reel
- mounting hole
- 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
- 244000025254 Cannabis sativa Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241001494496 Leersia Species 0.000 description 1
- 241001520823 Zoysia Species 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Harvester Elements (AREA)
Description
【発明の詳細な説明】
本発明はモータで発生した回転トルクによりリ
ール刃を回転させて芝を刈る芝刈機に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lawn mower that mows lawns by rotating a reel blade using rotational torque generated by a motor.
リール刃ブロツクは、一般的にその重量が重く
慣性力が大きい為、異物混入時などの衝撃で刃先
をいためることが多かつた。しかも、その場合第
１図に示すような従来例ではツイスト状の可動刃
１７を刃動刃支持円板１８′に溶接して一体化し
ているため、リール刃ブロツク２′ごと全て交換
する必要があつた。また、第２図に示す別な従来
例では、可動刃１７だけをねじ１６′の着脱によ
り簡単に交換できる構造になつているが、この構
造においても可動刃１７の交換を精度良く行なう
ためには次の寸法管理が重要となる。即ち、第３
図に示すようにリール軸１４の軸センターからの
可動刃固定板１９のタツプ穴１２位置寸法Ｌ、タ
ツプ穴１２の径D1、ねじ１６′の径D2および可動
刃１７に設けた取付孔１７ａの径D3が重要とな
り、これらの寸法を３〜５枚の可動刃１７の全て
にわたつて精度良く加工し、取付けることは非常
に困難である。特にねじ１６′のねじ部寸法およ
びタツプ穴１２径を精度良く加工することが難か
しいという欠点がある。加えて、このねじ１６′
のねじ部寸法と可動刃の取付孔１７ａ寸法とが誤
差によつて異なると、第４図に示すようにねじ１
６′と取付孔１７ａの縁とは線接触となり、可動
刃１７に衝撃荷重等が作用すると変形しやすく位
置決め精度が得られなくなるという欠点がある。 Reel blade blocks are generally heavy and have a large inertia, so the cutting edge is often damaged by shocks such as when foreign objects get mixed in. Moreover, in this case, in the conventional example shown in FIG. 1, the twisted movable blade 17 is welded and integrated with the blade support disk 18', so it is necessary to replace the entire reel blade block 2'. It was hot. Further, in another conventional example shown in FIG. 2, only the movable blade 17 can be easily replaced by attaching and removing the screw 16', but even in this structure, in order to accurately replace the movable blade 17, The following dimension management is important. That is, the third
As shown in the figure, the position dimension L of the tap hole 12 of the movable blade fixed plate 19 from the axis center of the reel shaft 14, the diameter D 1 of the tap hole 12, the diameter D 2 of the screw 16', and the mounting hole provided on the movable blade 17. The diameter D3 of the movable blade 17a is important, and it is extremely difficult to precisely process and attach these dimensions to all three to five movable blades 17. In particular, there is a drawback that it is difficult to accurately machine the dimensions of the threaded portion of the screw 16' and the diameter of the tapped hole 12. In addition, this screw 16'
If the dimensions of the threaded part of 1 and the dimensions of the mounting hole 17a of the movable blade differ due to an error, as shown in FIG.
6' and the edge of the mounting hole 17a are in line contact, and when an impact load or the like is applied to the movable blade 17, it is easily deformed and positioning accuracy cannot be obtained.
本発明は叙上の従来例の欠点に鑑みなされたも
のであり、その目的とするところはリール刃ブロ
ツクを軽量化すると共に可動刃の取付孔を面状に
固定できることにより、可動刃に衝撃荷重が加わ
つても変形しにくく、しかも、可動刃だけを簡単
に着脱交換でき、可動刃取付けの寸法精度も出し
易い芝刈機を提供するにある。 The present invention was made in view of the drawbacks of the conventional example described above, and its purpose is to reduce the weight of the reel blade block and to fix the mounting hole of the movable blade in a plane, thereby reducing the impact load on the movable blade. To provide a lawn mower which is not easily deformed even when the movable blade is applied, and in which only the movable blade can be easily attached/detached and replaced, and the dimensional accuracy of the movable blade attachment can be easily achieved.
以下、本発明の一実施例を添付図により詳述す
る。 Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.
第５図に芝刈機の全体斜視図を示し、第６図に
その本体の断面図を示す。芝草等を刈るためのリ
ール刃ブロツク２や固定刃３、駆動用のモータ２
６等は本体１内に納められている。リール刃ブロ
ツク２は本体１内でリール軸１４により回転自在
に軸支され、固定刃３は固定刃取付板４にねじ５
で取付けられている。本体１はハンドル７を持つ
て本体１下の前後輪８，９により走行させられ、
走行しながら芝草等を刈るものであり、刈高さ調
整レバー４２を前後に動かすことにより前輪８を
上下させて芝草等の刈高さを調整でき、刈られた
芝草等は本体１後ろの集草かご４４内に収集され
るのである。又、固定刃調整ハンドル３６を回す
ことにより固定刃３とリール刃ブロツク２とのギ
ヤツプ調整を行なえる。 FIG. 5 shows an overall perspective view of the lawn mower, and FIG. 6 shows a sectional view of its main body. Reel blade block 2 and fixed blade 3 for mowing lawn grass, etc., and drive motor 2
The 6th grade is housed in the main body 1. The reel blade block 2 is rotatably supported by a reel shaft 14 within the main body 1, and the fixed blade 3 is attached to a fixed blade mounting plate 4 with a screw 5.
It is installed in The main body 1 is moved by the front and rear wheels 8 and 9 under the main body 1 while holding the handle 7.
This device cuts grass, etc. while driving, and by moving the cutting height adjustment lever 42 back and forth, the front wheels 8 can be moved up and down to adjust the cutting height of the grass, etc., and the cut grass, etc. is collected at the back of the main body 1. The grass is collected in the grass basket 44. Further, by turning the fixed blade adjustment handle 36, the gap between the fixed blade 3 and the reel blade block 2 can be adjusted.
第７図にリール刃ブロツク２の部分の断面図を
示し、第８図にその分解斜視図を示してある。リ
ール軸１４はベルト２２で大プーリ２１に伝えら
れた動力でベアリング１３を軸受として、回転す
る様になつている。リール軸１４にはリール軸１
４に同芯に可動刃支持円板１８が溶接等により固
着されている。可動刃支持円板１８には４本の可
動刃固定板１９が放射状（卍状）に固定ねじ２０
で取りつけられている。もちろん、可動刃固定板
１９は可動刃支持円板１８と一体に形成しても良
い。このようにして、可動刃支持円板１８及び可
動刃固定板１９は従来例の可動刃支持円板１８′
のような比較的大きな円板形状から可動刃１７の
取付枚数分だけ切欠き部１０を一部切り欠いた形
状（例えば、４枚刃の場合は卍型）をしており、
可動刃支持円板１８と可動刃固定板１９との外径
（第８図に想像線で示す。）は従来の可動刃支持円
板１８′程度であり、本発明では可動刃固定板１
９間に切欠き部１０が形成されることになり、そ
の切欠き部１０の分だけ重量が軽減されることに
なる。可動刃固定板１９の刃取付面１９ｂには可
動刃１７の端部に設けた角孔状の取付孔１７ａに
嵌合する角柱状の突起１９ａが設けられ、この突
起１９ａの先部には雄ねじ１９ｄが切られてい
る。この突起１９ａは可動刃１７の板厚と同程度
長さ範囲内において精度良く抜き加工された上下
幅H1の位置決め用平坦部となつており、一方可
動刃１７の取付孔１７ａはぴつたりと突起１９ａ
に嵌合するように突起１９ａの上下幅H1と等し
い上下幅H2寸法となるように精度良く加工され
ている。可動刃１７の可動刃固定板１９への取付
は第９図に示すように可動刃１７に設けた取付孔
１７ａと可動刃固定板１９の突起１９ａを合わせ
て組み込み、外側からナツト１６で締付け固定す
る構造となつている。尚、取付孔１７ａの幅は突
起１９ａの横幅よりも広くて可動刃１７の伸縮を
吸収できるようになつていても良い。本発明の固
定刃固定板１９においては、可動刃１７の交換を
精度良く行なうための重要寸法はリール軸１４セ
ンターからの突起１９ａ位置の寸法Ｌおよび突起
１９ａの上下幅寸法H1で、可動刃においては取
付孔１７ａの上下幅H2であり、従来例より重要
寸法が１つ少ない為に精度を出し易く、可動刃１
７を取りつけた状態では突起１９ａと取付孔１７
ａは隙間なく嵌合している。このように可動刃１
７取付時における位置決め用の重要管理寸法が少
なく、しかも重要寸法はプレス金型寸法等で精度
の出るような構造をしているので、可動刃１７取
付精度が良くなり、切味の良い芝刈りをすること
ができる。又、取付孔１７ａと突起１９ａとから
成る可動刃位置決め部が面接触となるので、可動
刃１７に衝撃荷重を受けた際にも位置決め部が変
形しにくく、良好な位置決め精度を長く維持でき
る。 FIG. 7 shows a sectional view of the reel blade block 2, and FIG. 8 shows an exploded perspective view thereof. The reel shaft 14 is configured to rotate using a bearing 13 as a bearing by power transmitted to a large pulley 21 by a belt 22. The reel shaft 14 has the reel shaft 1
A movable blade support disk 18 is fixed concentrically to 4 by welding or the like. On the movable blade support disk 18, four movable blade fixing plates 19 are arranged radially (swastika-shaped) with fixing screws 20.
It is attached with. Of course, the movable blade fixed plate 19 may be formed integrally with the movable blade support disk 18. In this way, the movable blade support disk 18 and the movable blade fixed plate 19 are replaced with the movable blade support disk 18' of the conventional example.
It has a shape in which part of the notch 10 is cut out by the number of movable blades 17 attached from a relatively large disk shape (for example, a swastika shape in the case of four blades),
The outer diameters of the movable blade support disk 18 and the movable blade fixing plate 19 (shown by imaginary lines in FIG. 8) are approximately the same as the conventional movable blade support disk 18', and in the present invention, the movable blade fixing plate 1
A notch 10 is formed between the parts 9 and 9, and the weight is reduced by the amount of the notch 10. The blade mounting surface 19b of the movable blade fixed plate 19 is provided with a prismatic projection 19a that fits into a square mounting hole 17a provided at the end of the movable blade 17, and a male thread is attached to the tip of the projection 19a. 19d is cut. This protrusion 19a is a positioning flat part with a vertical width H 1 that is precisely punched within a length range that is approximately the same as the plate thickness of the movable blade 17, while the mounting hole 17a of the movable blade 17 is tightly fitted. Protrusion 19a
The protrusion 19a is precisely machined so that the vertical width H2 is equal to the vertical width H1 of the protrusion 19a. To attach the movable blade 17 to the movable blade fixing plate 19, as shown in FIG. 9, align the mounting hole 17a provided in the movable blade 17 with the protrusion 19a of the movable blade fixing plate 19, and then tighten the nut 16 from the outside. The structure is such that Note that the width of the attachment hole 17a may be wider than the width of the protrusion 19a so that expansion and contraction of the movable blade 17 can be absorbed. In the fixed blade fixed plate 19 of the present invention, the important dimensions for accurately replacing the movable blade 17 are the dimension L of the protrusion 19a position from the center of the reel shaft 14, the vertical width dimension H1 of the protrusion 19a, and the movable blade In this case, the vertical width of the mounting hole 17a is H 2 , and since there is one less important dimension than the conventional example, it is easier to achieve accuracy, and the movable blade 1
7 is installed, the protrusion 19a and the mounting hole 17
A is fitted without any gap. In this way, movable blade 1
7. Since there are few important control dimensions for positioning during installation, and the important dimensions are press mold dimensions, etc., the structure is such that accuracy can be achieved, so the movable blade 17 can be installed with good accuracy, allowing for sharp lawn mowing. can do. Furthermore, since the movable blade positioning section consisting of the mounting hole 17a and the protrusion 19a is in surface contact, the positioning section is not easily deformed even when the movable blade 17 receives an impact load, and good positioning accuracy can be maintained for a long time.
以上述べたところから明らかなように、本発明
は、要約すれば、リール軸１４の両端に対向せる
一対の可動刃支持円板１８を設け、可動刃支持円
板１８より複数本の可動刃固定板１９を延出して
可動刃固定板１９間に切欠き部１０を形成し、可
動刃固定板１９の刃取付面１９ｂより角柱状の突
起１９ａを突設して突起１９ａの先端に雄ねじ１
９ｄを形成し、可動刃１７の端にあけた角孔状の
取付孔１７ａと上記突起１９ａとを嵌め合せて雄
ねじ１９ｄにナツト１６を締め付け、これにより
リール刃ブロツク２を形成し、上記取付孔１７ａ
のリール軸１４径方向と垂直な内面と上記突起１
９ａのリール軸１４径方向と垂直な外面とを互い
に面状に当接させた構成を有しているものであ
る。 As is clear from the above, the present invention can be summarized by providing a pair of movable blade support discs 18 facing each other at both ends of the reel shaft 14, and fixing a plurality of movable blades from the movable blade support disc 18. The plate 19 is extended to form a notch 10 between the movable blade fixing plates 19, a prismatic protrusion 19a is provided protruding from the blade mounting surface 19b of the movable blade fixing plate 19, and a male screw 1 is attached to the tip of the protrusion 19a.
9d, and fit the square mounting hole 17a drilled at the end of the movable blade 17 with the projection 19a, and tighten the nut 16 on the male screw 19d, thereby forming the reel blade block 2, 17a
The inner surface perpendicular to the radial direction of the reel shaft 14 and the projection 1
The reel shaft 9a has a configuration in which outer surfaces perpendicular to the radial direction of the reel shaft 14 are brought into planar contact with each other.
本発明は上記構成を有するが故に、従来の比較
的大きな可動刃支持円板に比較して切欠き部の量
だけ可動刃支持円板及び可動刃固定板の重量が軽
量化され、慣性力が軽減するため、異物混入時等
の衝撃にも制動がかかり易くて可動刃の刃先の破
損を減少させることができる効果があり、更に、
リール刃ブロツクから可動刃だけを簡単に着脱で
きるものでありながら、可動刃固定板の突起と可
動刃の取付孔とが、従来のように点接触でなく、
回転方向と平行な辺で面接触されるようになつた
ため、可動刃に衝撃荷重が加わつても変形しにく
く、可動刃の取付孔内には角柱状の突起を嵌め合
せるようにしているので寸法精度が出し易いとい
う効果がある。 Since the present invention has the above configuration, the weight of the movable blade support disk and the movable blade fixed plate is reduced by the amount of the notch compared to the conventional relatively large movable blade support disk, and the inertia force is reduced. In order to reduce the impact, it is easy to brake the impact caused by foreign matter getting mixed in, which has the effect of reducing damage to the cutting edge of the movable blade.
Although only the movable blade can be easily attached and detached from the reel blade block, the protrusion of the movable blade fixing plate and the mounting hole of the movable blade are not in point contact as in the past,
Since surface contact is now made on the sides parallel to the direction of rotation, it is difficult to deform even if an impact load is applied to the movable blade, and a prismatic protrusion is fitted into the mounting hole of the movable blade to improve the dimensions. This has the effect of making it easier to achieve accuracy.
第１図は従来例の斜視図、第２図は別な従来例
の断面図、第３図は同上の部分断面図、第４図は
同上の可動刃の取付け状態を示す説明図、第５図
は本発明の一実施例を示す斜視図、第６図は同上
の本体の縦断面図、第７図は同上の水平断面図、
第８図は可動刃を外した状態の斜視図、第９図は
可動刃を取付けたときの断面図、第１０図は同上
の可動刃の取付け状態を示す説明図である。
２……リール刃ブロツク、１０……切欠き部、
１４……リール軸、１６……ナツト、１７……可
動刃、１７ａ……取付孔、１８……可動刃支持円
板、１９……可動刃固定板、１９ａ……突起、１
９ｂ……刃取付面、１９ｄ……雄ねじ。
Fig. 1 is a perspective view of a conventional example, Fig. 2 is a sectional view of another conventional example, Fig. 3 is a partial sectional view of the same as the above, Fig. 4 is an explanatory view showing the installation state of the movable blade of the same as the above, and Fig. 5 The figure is a perspective view showing one embodiment of the present invention, FIG. 6 is a vertical sectional view of the main body of the same as above, and FIG. 7 is a horizontal sectional view of the same as above.
FIG. 8 is a perspective view with the movable blade removed, FIG. 9 is a sectional view with the movable blade attached, and FIG. 10 is an explanatory diagram showing the attached state of the movable blade. 2... Reel blade block, 10... Notch part,
14...Reel shaft, 16...Nut, 17...Movable blade, 17a...Mounting hole, 18...Movable blade support disk, 19...Movable blade fixing plate, 19a...Protrusion, 1
9b...Blade mounting surface, 19d...Male thread.
Claims (1)
円板を設け、可動刃支持円板より複数本の可動刃
固定板を延出して可動刃固定板間に切欠き部を形
成し、可動刃固定板の刃取付面より角柱状の突起
を突設して突起の先端に雄ねじを形成し、可動刃
の端にあけた角孔状の取付孔と上記突起とを嵌め
合せて雄ねじにナツトを締め付け、これによりリ
ール刃ブロツクを形成し、上記取付孔のリール軸
径方向と垂直な内面と上記突起のリール軸径方向
と垂直な外面とを互いに面状に当接させて成るこ
とを特徴とする芝刈機。1. A pair of movable blade support disks are provided at both ends of the reel shaft, and a plurality of movable blade fixing plates are extended from the movable blade support disks to form a notch between the movable blade fixing plates. A prismatic protrusion is provided protruding from the blade mounting surface of the fixed plate, a male thread is formed at the tip of the protrusion, the square mounting hole drilled at the end of the movable blade is fitted with the above protrusion, and a nut is inserted into the male thread. tightening, thereby forming a reel blade block, and the inner surface of the mounting hole perpendicular to the radial direction of the reel shaft and the outer surface of the protrusion perpendicular to the radial direction of the reel shaft are brought into planar contact with each other. lawn mower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3606182A JPS58152403A (en) | 1982-03-08 | 1982-03-08 | Mower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3606182A JPS58152403A (en) | 1982-03-08 | 1982-03-08 | Mower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58152403A JPS58152403A (en) | 1983-09-10 |
| JPS624084B2 true JPS624084B2 (en) | 1987-01-28 |
Family
ID=12459195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3606182A Granted JPS58152403A (en) | 1982-03-08 | 1982-03-08 | Mower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58152403A (en) |
-
1982
- 1982-03-08 JP JP3606182A patent/JPS58152403A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58152403A (en) | 1983-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4190954A (en) | Cutting heads | |
| JPH07274656A (en) | Nylon cord type brush cutter | |
| US11523559B2 (en) | Low-energy blade system having a quick-attach mechanism | |
| US5701728A (en) | Lawn mower with line trimmer assembly | |
| JPS624084B2 (en) | ||
| EP3935933B1 (en) | Means for adjusting cutting height of a powered lawn mower | |
| JPS6134975Y2 (en) | ||
| US2939264A (en) | Retractile cutter blades assembly for lawn mowers | |
| JPH0928154A (en) | Cutting blade for brush cutter | |
| US4691685A (en) | Sawblade collar assembly | |
| JPH11235113A (en) | Nylon cutter cord type rotating blade for mowing | |
| JPS624085B2 (en) | ||
| JP2566252Y2 (en) | Cover to prevent winding of brush cutter | |
| JPS6338743Y2 (en) | ||
| US2266165A (en) | Mower | |
| JPS6027316A (en) | Reel blade of mower | |
| JPS58152405A (en) | Mower | |
| US20260053096A1 (en) | Cutting assembly and lawn mower | |
| JPH0217835Y2 (en) | ||
| KR200229678Y1 (en) | Grind wheel with unifying hole and grinding metal | |
| JPH07246501A (en) | Brake disc correction device | |
| JPH11346531A (en) | Rotary blade of nylon cutter cord type | |
| JPS5915864Y2 (en) | Dust-proof structure for brush cutters | |
| JPH058943Y2 (en) | ||
| JPS6115697Y2 (en) |