JPS6156835U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案に係る装置を備えた刈払機の斜
視説明図、第２図は本考案の１実施例の側断面図
、第３図は他の状態における要部の側断面図、第
４図は従来例の要部の側断面図、第５図は他の状
態における同要部の側断面図である。 ３…刈刃、３７…回転軸、４１…スプライン部
、４３…上部座金、４９…係合孔、５１…係合段
部、５３…下部座金、５５…ねじ体、５７…凹部
、５９…段部。 FIG. 1 is a perspective explanatory view of a brush cutter equipped with a device according to the present invention, FIG. 2 is a side sectional view of one embodiment of the present invention, FIG. 3 is a side sectional view of the main parts in another state, and FIG. FIG. 4 is a side sectional view of the main part of the conventional example, and FIG. 5 is a side sectional view of the same main part in another state. 3... Cutting blade, 37... Rotating shaft, 41... Spline portion, 43... Upper washer, 49... Engagement hole, 51... Engagement stepped portion, 53... Lower washer, 55... Screw body, 57... Recessed portion, 59... Step Department.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 回転軸３７の外周に設けたスプライン部４１に
係合する上部座金４３と、前記回転軸３７の外周
の、前記上部座金４３の下方位置に嵌合する下部
座金５３とを設け、前記上部座金４３と前記下部
座金５３との間に刈刃３を挾持し、前記回転軸３
７の下端に螺合するナツト等のねじ体５５によつ
て固定して設けた刈刃支持装置において、前記上
部座金４３の下面に、前記刈刃３の中心の係合孔
４９に係合する係合段部５１を設けるとともに、
前記下部座金５３の上面に、前記係合孔４９の内
径寸法より大きな内径寸法の凹部５７を設け、前
記下部座金５３の下面に、前記係合孔４９の内径
寸法より小さな外径寸法の段部５９を設けたこと
を特徴とする刈払機の刈刃支持装置。 An upper washer 43 that engages with a spline portion 41 provided on the outer periphery of the rotating shaft 37 and a lower washer 53 that fits in a position below the upper washer 43 on the outer periphery of the rotating shaft 37 are provided. and the lower washer 53, the cutting blade 3 is held between the rotary shaft 3 and the lower washer 53.
In the cutting blade support device fixedly provided by a screw body 55 such as a nut screwed onto the lower end of the cutting blade 7, the lower surface of the upper washer 43 is engaged with the engagement hole 49 at the center of the cutting blade 3. While providing the engagement step portion 51,
A recess 57 having an inner diameter larger than the inner diameter of the engagement hole 49 is provided on the upper surface of the lower washer 53, and a step portion 57 having an outer diameter smaller than the inner diameter of the engagement hole 49 is provided on the lower surface of the lower washer 53. 59. A mower blade support device for a brush cutter, characterized in that a mower blade support device is provided with a mower.