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Rotary impact tool

A technology of rotating tools and impact force, applied in the field of impact rotating tools, can solve the problem of not being able to enter the tightening action, etc.

Inactive Publication Date: 2008-05-14
PANASONIC ELECTRIC WORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in this tool, if the main switch is not kept on after the motor stops, the tightening operation cannot be performed. Therefore, if the operator turns off the main switch after the motor stops, the tightening operation cannot be performed.

Method used

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  • Rotary impact tool
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  • Rotary impact tool

Examples

Experimental program
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Embodiment Construction

[0025] Hereinafter, the present invention will be described based on the embodiments shown in the drawings. figure 1 A block configuration showing an example of the impact rotary tool of the present invention. The impact rotary tool includes a main switch 2 for operation indication, a motor 3, a switch element 4 for on / off control of the motor 3, a control circuit 5, an impact detection circuit 6, a normal operation time setting dial 7, and a tightening action Mode time setting dial 8, working time detection circuit 9, battery 10 as power supply. The battery 10 , the main switch 2 , the motor 3 and the switching element 4 are connected in series, which are connected in parallel with the control circuit 5 .

[0026] figure 2 Indicates the schematic of the structure, image 3 An example of the driving mechanism 30 for performing fastening work by the impact of a blow is shown. The rotation of the motor 3 transmits the planetary gear 32 to the drive shaft 36 supported by the...

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PUM

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Abstract

The present invention provided an impact rotary tool which can suitably shift to a retightening operation mode. The impact rotary tool is formed of a driving mechanism for carrying out clamping work by an impact force generated by driving, a motor 3 as a driving source of the driving mechanism, an operation indicating main switch 2, and a control means 5 for controlling the on / off-state of the motor 3, and shiftable to the retightening operation mode. Further the impact rotary tool comprises a time period detecting section 9 for measuring an on / off-time period of the main switch 2, and the control means 5 controls the shift of the impact rotary tool to the retightening operation mode based on a time period detected by the time detecting section from the time the main switch 2 is turned off to the time the main switch 2 is turned on again. After the completion of ordinary work, if the main switch is turned on again within a predetermined time period, retightening operation is carried out.

Description

technical field [0001] The present invention relates to an impact rotary tool used for fastening work of screws, nuts, screws and the like. Background technique [0002] Among the impact tools, there are various tools that automatically stop when the specified tightening torque is reached. However, in actual work, in order to avoid excessive tightening, there are many cases where the tightening is insufficient. Therefore, in JP-A-2001 -129767 publication (patent document 1) has shown the tool which can perform tightening. [0003] In this tool, when the tightening torque is reached, the control unit stops the motor, and the operator keeps the main switch on, the control unit restarts the motor, and tightens by applying only a predetermined number of blows. In this tightening mode, since striking energy is generally reduced, overtightening can be prevented. [0004] However, in this tool, if the main switch is not kept on after the motor stops, the tightening action cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B23/147B25B21/02B25B23/14
CPCB25B23/1475
Inventor 清水秀规大桥敏治河井幸三才之本良典泽野史明宫崎博有村直松本多津彦
Owner PANASONIC ELECTRIC WORKS CO LTD