公开(公告)号：US06314922B1

公开(公告)日：2001-11-13

申请号：US09360107

申请日：1999-07-23

申请人： Helmut Zimmermann ,  Werner Geyer ,  Jörg Schlossarczyk ,  Hans Nickel ,  Harald Schliemann ,  Gunter Stein ,  Peter Stücke ,  Bernhard Dürr ,  Axel Klimmek

发明人： Helmut Zimmermann ,  Werner Geyer ,  Jörg Schlossarczyk ,  Hans Nickel ,  Harald Schliemann ,  Gunter Stein ,  Peter Stücke ,  Bernhard Dürr ,  Axel Klimmek

IPC分类号： F01P704

CPC分类号： F02M35/1017 ,  B25F5/008 ,  B27B17/00 ,  F02B63/02 ,  F02B2075/025 ,  F02M35/10013 ,  F02M35/10262 ,  Y02T10/146

摘要： A hand-held working tool has a housing and an internal combustion engine arranged in the housing and comprising a crankshaft and an air filter. A tool is driven by the crankshaft of the internal combustion engine. A fan housing is attached to the engine housing and has an air inlet. A fan wheel is arranged in the fan housing and is driven by the crankshaft of the internal combustion engine to supply cooling air, sucked in through the air inlet, to the internal combustion engine. The fan housing has a bottom extending radially to the crankshaft. The bottom and a side of the fan wheel facing the bottom define a chamber in the fan housing. The bottom has a combustion air outlet. A combustion air channel is connected to the combustion air outlet and to the air filter. The combustion air outlet is axially supplying combustion air from the chamber through the combustion air channel into the air filter of internal combustion engine. The fan housing has a channel wall having a bottom portion connected to the face of the bottom remote from the fan wheel and covering the bottom partially to form a double-walled bottom. The end face portion of the combustion air channel is defined by the bottom and the bottom portion of the channel wall. In an alternative embodiment the combustion air channel is provided in a hollow beam of a support that supports the drive unit of the working tool.

摘要翻译： 一种手持式工具具有壳体和布置在壳体中的内燃机，包括曲轴和空气过滤器。 工具由内燃机的曲轴驱动。 风扇壳体附接到发动机壳体并具有进气口。 风扇轴设置在风扇壳体中，并由内燃机的曲轴驱动，以将通过空气入口吸入的冷却空气供给到内燃机。 风扇壳体具有径向延伸到曲轴的底部。 风扇轮的底部和面向底部的一侧限定了风扇壳体中的室。 底部有一个燃烧空气出口。 燃烧空气通道连接到燃烧空气出口和空气过滤器。 燃烧空气出口轴向地将来自腔室的燃烧空气通过燃烧空气通道供应到内燃机的空气过滤器中。 风扇壳体具有通道壁，该通道壁的底部连接到远离风扇叶的底部的表面，并部分地覆盖底部以形成双壁底部。 燃烧空气通道的端面部分由通道壁的底部和底部限定。 在替代实施例中，燃烧空气通道设置在支撑工作工具的驱动单元的支撑件的中空梁中。