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electric pulse tool

An electric pulse and tool technology, applied in the direction of manufacturing tools, power tools, electric components, etc., can solve problems such as operator reaction force, and achieve the effect of improving characteristics

Active Publication Date: 2021-09-28
ATLAS COPCO INDAL TECHN AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A problem encountered when operating power tools, especially hand-held power tools, is that the operator is subject to reaction forces

Method used

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Embodiment Construction

[0019] Conventional power tools such as nutrunners or screwdrivers are usually provided with sensors, such as angle encoders and / or torque meters, which make it possible to control the quality of the work operation performed, such as tightening a joint.

[0020] Furthermore, especially with hand-held power tools, it is important that the reaction forces to which the operator is exposed are as low as possible and that the time to complete a specific tightening operation be as short as possible. Operators can perform hundreds of fastening operations during a work cycle, so it is important that they are both ergonomic for operator health and quickly increase workstation productivity. Ergonomic fastening usually means that reaction forces are as low as possible.

[0021] figure 1 An exemplary embodiment of an electrical pulse tool 10 according to an embodiment of the present invention is depicted. The tool 10 is configured to perform a tightening operation in which torque is tra...

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Abstract

The invention relates to an electric pulse tool (10) and a method for an electric pulse tool (10), characterized in that the characteristics of the reaction force are improved so that the use of the electric pulse tool becomes more ergonomic. This object is achieved by an electric pulse tool (10) in which torque is transmitted in pulse form on an output shaft (12). For each cycle, a pulse of current is supplied to the motor (11) during the current-on interval. The current supply to the motor (11) is then suspended. Thereafter the width of the torque pulse is determined. And then the current supply to the motor (11) continues to be suspended during the pause interval from the end of the torque pulse, wherein the pause interval is determined based on the width of the torque pulse.

Description

technical field [0001] The present invention relates to electrical pulse tools and methods for electrical pulse tools. In particular, the invention relates to an electric pulse tool for performing screwing operations, in which torque is transmitted in pulses, for example to tighten and / or loosen threaded joints. Background technique [0002] Power tools for tightening bolts, screws and nuts are used in many different applications. In some of these applications, it is desirable or even required to be able to control the clamping force, or at least the associated torque. Such power tools are typically controlled to rotate the output shaft of the power tool, thereby measuring torque. When the torque reaches a predetermined value, the electric tool is controlled to stop the rotation of the output shaft. This can be achieved, for example, by cutting power to the tool, or the clutch can be slipped. [0003] A problem encountered when operating power tools, especially hand-held...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B21/00B25B23/147
CPCB25B21/00B25B23/147H02P27/085B25F5/001B25B21/02B25B23/1475H02K7/145H02P8/10
Inventor A·克劳特布利克斯特
Owner ATLAS COPCO INDAL TECHN AB