Hand-held drilling and/or hammering device with dust collecting element

A dust collection and tool technology, applied in the field of hand-held drilling and/or hammering tools, dust collection units, which can solve the problems of reduced motor rotation speed, motor speed can not choose the best speed of the fan, etc.

Inactive Publication Date: 2004-11-03
BLACK & DECKER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A problem with these types of dust collection units is that the fan is driven at the rotational speed of the tool motor, so that the chosen rotational speed of the motor is the optimum speed for the tool but not the optimum speed for the fan
In addition, the rotational speed of the motor may be reduced, for example, when the tool is working hard
Therefore, the speed of the motor cannot be chosen to be the optimal speed for the fan

Method used

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  • Hand-held drilling and/or hammering device with dust collecting element
  • Hand-held drilling and/or hammering device with dust collecting element
  • Hand-held drilling and/or hammering device with dust collecting element

Examples

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Embodiment Construction

[0033] The hand hammer shown in FIGS. 1 and 4 is known to have a housing which contains a motor housing part ( 2 ) in which the electric motor ( 3 ) of the hammer is housed. The tool holder (26) is positioned at the front end of the electric hammer shaft. A tool or drill (24) may be non-rotatably and releasably secured in the tool holder to allow limited reciprocating movement of the tool or drill relative to the tool holder. The hammer has a back handle (18) with an on / off trigger (20) for operating a switch (23) to turn on power to the motor. The motor (3) of the electric hammer selectively drives a spindle drive mechanism to rotationally drive the shaft of the electric hammer, thereby rotationally driving the tool holder (26) and the tool or drill bit (24) mounted thereon, which is known in the art It is well known. Additionally, the hammer motor selectively drives an air cushion hammering mechanism to repeatedly strike the tool or bit (24), as is well known in the art. ...

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PUM

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Abstract

An electrically powered hand held drilling and / or hammering tool having a dust collection unit powered by a motor (51) housed in the unit, which unit can be releasably fitted to the tool. A plug arrangement (12) and a cooperating socket arrangement (28), one of which is formed on the tool and the other of which is formed on the unit, are provided for electrically connecting the power supply for the tool to the motor (51) of the unit. A first mechanical fixing arrangement is provided comprising a first projection (8) and a first cooperating recess (54), one of which is formed on the tool and the other of which is formed on the unit, located adjacent the respective part of the plug and socket arrangements and a second mechanical fixing arrangement is provided, located remotely from the first and comprising a manually actuable releasable latch arrangement (72,66) and a second cooperating recess (60), one of which is formed on the tool and the other of which is formed on the unit. The first and second mechanical fixing arrangements cooperate to secure the dust collection unit to the tool in such a way that the plug and socket arrangements form an electrical connection.

Description

technical field [0001] The invention contemplates a hand-held drilling and / or hammering tool with a dust collection unit and a dust collection unit for such a tool. Background technique [0002] Hand-held drilling and / or hammering tools are known which may use a dust collection unit as an accessory. The collection unit can be mechanically releasably mounted on the tool and usually consists of a guard to collect dust from the tool or tool bit; a dust collection chamber; a filter and a system to generate hood, collection chamber and filter airflow. Dust and debris generated by tools and tool bits will be carried away by this airflow so that they can be sucked into the guard and into the collection cavity. As the airflow passes through the filter, dust or debris floating in the airflow will settle in the collection chamber. [0003] Systems used to generate airflow typically include a fan, which can be placed in the tool or in the dust collection unit. When the fan is place...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q1/00B23Q11/00
CPCY10T408/50B23Q11/0046Y10T408/453B23Q1/0009
Inventor 阿里什·克劳斯-迪特尔伯恩哈特·拉尔夫斯坦克·托马斯瓦赫·罗伯特施塔斯·恩斯特
Owner BLACK & DECKER INC
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