公开(公告)号：US5168837A

公开(公告)日：1992-12-08

申请号：US901179

申请日：1992-06-19

申请人： Horst Scholz

发明人： Horst Scholz

IPC分类号： B25F5/00 ,  B25F5/02 ,  B27B17/00 ,  F01P5/02 ,  F01P5/06 ,  F01P11/12 ,  F02B63/02

CPC分类号： F02B63/02 ,  B27B17/00 ,  F01P11/12 ,  F01P5/02

摘要： The invention is directed to a work apparatus having a fan wheel driven by a motor mounted in a housing. A fan cover covers the fan wheel and defines a plurality of air-inlet openings arranged in a grid-like pattern forward of the fan wheel through which a first component flow of cooling air passes to the fan wheel. The fan cover has an inside wall surface and a collar formed on the inside wall surface. An air-conducting wall is mounted on the inside wall surface and defines cooling channels communicating with the space within the collar for conducting a second component flow of cooling air to the fan wheel. The fan cover and the collar together with the air-conducting wall conjointly define a single unitary piece devoid of any fasteners which are separate from the fan cover, collar and air-conducting wall.

摘要翻译： 本发明涉及一种具有由安装在壳体中的马达驱动的风扇叶轮的工作装置。 风扇盖覆盖风扇叶轮，并且限定了多个入口开口，其布置成格栅状图案，风扇叶轮向前，冷却空气的第一分量流通过风扇叶轮传递到风扇叶轮。 风扇罩具有形成在内壁表面上的内壁表面和套环。 导风壁安装在内壁表面上并且限定了与轴环内的空间连通的冷却通道，用于将冷却空气的第二组分流向风扇轮传导。 风扇盖和轴环与导气壁一起共同限定了一个没有任何与风扇盖，轴环和导气壁分离的紧固件的整体件。