JPH0214925U

JPH0214925U -

Info

Publication number: JPH0214925U
Application number: JP9341488U
Authority: JP
Priority date: 1988-07-14
Filing date: 1988-07-14
Publication date: 1990-01-30

Description

[Brief explanation of drawings]

図面は本考案の一実施例を示し、第１図は芝刈
機の側面図、第２図はその要部断面図、第３図は
第２図の−線断面図、第４図は同−線断
面図である。１は芝刈機、２はカツターハウジング、３は前
輪、４は後輪、５はハンドル、６はエンジン、６
ａはエンジンケース、７，７ａ，７ｂはカツター
ブレード、８はクランクシヤフト、９はクラツチ
・ブレーキ機構、１０はキー、１１は回転プレー
ト、１２，２３，３０はスプリング、１３はクラ
ツチデイスク、１４はストツパープレート、１５
はブレードホルダープレート、１６は連結ピン、
１７はブレード取付円筒、１８，２５はベアリン
グ、１９はワツシヤ、２０，２２はボルト、２１
はブレーキプレート、２１ａはブレーキ部、２１
ｂは凹み部、２４はコントロールプレート、２４
ａはカム溝、２６は止め輪、２７はボール、２８
はボールリテーナー、２９はワイヤー、３１は取
付孔、３２はナツト、３３，４３は突起、３４は
刃部、３５は羽根、３６はスペーサー、３７，４
０は中央部、３８は両側部、３９，４１は傾斜部
、４２は突起係合孔。 The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a lawn mower, Fig. 2 is a sectional view of the main part thereof, Fig. 3 is a sectional view taken along the line - - of Fig. 2, and Fig. 4 is a - sectional view of the lawn mower. FIG. 1 is a lawn mower, 2 is a cutter housing, 3 is a front wheel, 4 is a rear wheel, 5 is a handle, 6 is an engine, 6
a is an engine case, 7, 7a, 7b are cutter blades, 8 is a crankshaft, 9 is a clutch/brake mechanism, 10 is a key, 11 is a rotating plate, 12, 23, 30 is a spring, 13 is a clutch disk, 14 is a stopper plate, 15
is the blade holder plate, 16 is the connecting pin,
17 is a blade mounting cylinder, 18, 25 is a bearing, 19 is a washer, 20, 22 is a bolt, 21
is a brake plate, 21a is a brake part, 21
b is a concave portion, 24 is a control plate, 24
a is a cam groove, 26 is a retaining ring, 27 is a ball, 28
is a ball retainer, 29 is a wire, 31 is a mounting hole, 32 is a nut, 33, 43 are protrusions, 34 is a blade, 35 is a blade, 36 is a spacer, 37, 4
0 is a center portion, 38 is a side portion, 39 and 41 are inclined portions, and 42 is a protrusion engagement hole.

Claims

[Scope of utility model registration request]

In a lawn mower equipped with at least a pair of cutter blades supported by a rotary drive shaft and extending in opposite directions, a drive plate of a clutch/brake mechanism is inserted and fixed to the rotary drive shaft, and the drive plate of the clutch/brake mechanism is fixed. A blade holder plate is provided which rotates together with a driven plate to which power is transmitted by frictional force from the driving plate and through which the rotational drive shaft is inserted. At least a pair of protrusions protrude downward so as to sandwich the cutter blades, and a pair of adjacent cutter blades have an engaging relationship between the protrusion engagement hole or recess and the protrusion that engages with the protrusion engagement hole or recess. lawn mower.