Hand held electric tool machine

A power tool and hand-held technology, applied in the field of hand-held power tools, can solve problems such as affecting the work of the power tools, and achieve the effect of preventing clogging

Inactive Publication Date: 2004-06-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In hand-held power tools with rotating cutters, such as hand-held circular saws, electric wall routers, stone saws, angle grinders, concrete grinders, planers, etc., the material removed from the workpiece due to the rotation of the cutters, such as Chips or dust are discharged directly from the protective cover, so that, for example, during longitudinal cutting, the removed material covers the intended cutting line and / or hits the operator directly, which in general significantly affects the operation of the machine tool

Method used

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Embodiment Construction

[0014] In the drawings, a hand-held electric circular saw machine is shown in different views, which is used as an embodiment of a common hand-held electric power tool for cutting or grinding workpieces, including a double-shell machine housing 10, The machine housing has a shaped handle 11 for guiding and operating the power tool and a mounted motor housing 12 in which the air-cooled motor is accommodated. The motor drives a transmission shaft 13 via a single-stage transmission (not shown), on which a circular saw blade 14 is clamped. The upper region of the circular saw blade 14 is covered by a protective cover 15 screwed to the machine housing 10 . The protective hood 15 extends to a support plate 16 connected to the machine housing 10 , via which the machine tool rests on the workpiece during sawing. The circular saw blade 14 penetrates the support plate 16 and protrudes downwards to a greater or lesser extent depending on the desired cutting depth. To adjust the cutting...

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Abstract

An electric hand power tool has a housing, a rotatably driven tool, a protective hood which at least partially covers the tool, a handle and an auxiliary handle for a two-hand guidance of the power tool, the auxiliary handle being hollow and formed as a withdrawal passage for a removed material thrown from the rotatably driven tool, the auxiliary handle having an inlet which is formed so that a radiating direction of the removed material from the rotatably driven tool is substantially tangential to a workpiece periphery in an inlet of the auxiliary handle, the inlet of the auxiliary handle being formed so that an inflow direction of the motor spent air coincides with the radiating direction of the removed material from the tool, and an air-cooled electric motor which drives the tool and is accommodated in the housing, the housing having an air passage provided with an air inlet opening for a motor spent air, the air passage being screw-shaped in direction of the motor spent air, which is directed in an opposite direction of the rotatably driven tool.

Description

technical field [0001] The invention relates to a hand-held electric power tool, in particular a hand-held electric circular saw, according to the preamble of claim 1 . Background technique [0002] In hand-held power tools with rotating cutters, such as hand-held circular saws, electric wall routers, stone saws, angle grinders, concrete grinders, planers, etc., the material removed from the workpiece due to the rotation of the cutters, such as Chips or dust are discharged directly from the protective cover, so that, for example, during longitudinal cutting, the removed material can cover the intended cutting line and / or hit the operator directly, which can significantly affect the operation of the machine tool overall. Contents of the invention [0003] An advantage of the inventive hand-held power tool with the features of claim 1 is that the removal material in the form of swarf or sawdust is thrown by the rotating tool by centrifugal action directly into the hollow aux...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23D59/00B24B23/02B24B55/10B27B9/00
CPCB27B9/00B24B23/028B23D59/006B24B55/102Y10T83/202Y10T83/207
Inventor 乌尔里希·博内欧根·希尔德海科·勒姆
Owner ROBERT BOSCH GMBH
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