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Rotary impact tool

A technology of rotating tools and rotating angles, which is applied in the field of impact rotating tools, can solve problems such as inability to enter the tightening action and unacceptable operation sequence, and achieve the effect of effectively using the tightening mode and improving the practicability

Inactive Publication Date: 2005-11-16
MATSUSHITA ELECTRIC WORKS 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 action will not be performed. Therefore, if the operator turns off the main switch after the motor stops, the tightening action cannot be performed.
[0005] In addition, from the point of view of actual operation, when there are many screws to be tightened, there are many cases where the usual tightening operation is performed on all of them, and then tightened sequentially. However, this operation sequence is not advisable.

Method used

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Examples

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Embodiment Construction

[0022] Hereinafter, the present invention will be described based on the embodiments shown in the drawings. figure 1 An example of the impact rotary tool of the present invention is shown. The impact rotary tool includes a main switch 2 for operation instruction, a motor 3, a switch element 4 for on / off control of the motor 3, a control circuit 5 (control unit), an impact detection circuit 6, and a torque sensor for setting the tightening torque. Setting dial 7 (torque setting unit), working time detection circuit 9, battery 10 as a power source, torque calculation circuit 11 (torque calculation unit), tightening setting switch 12 (tightening setting unit). 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 .

[0023] 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 b...

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Abstract

PROBLEM TO BE SOLVED: To provide an impact rotary tool which can carry out retightening work singly.

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 provided various tools that automatically stop when the specified tightening torque is reached, but in actual work, there are many cases where the tightening is insufficient. Therefore, in JP-A-2001-129767 (Patent Document 1) shows a tool that can perform tightening. [0003] In this tool, when the tightening torque is reached, the control unit stops the motor and then keeps the main switch on, the control unit restarts the motor, and tightens by applying only a predetermined number of blows. [0004] However, in this tool, if the on state of the main switch is not kept after the motor stops, then the tightening action will not be entered, so if the operator turns off the main switch after the motor stop operation is completed, the tightening action cannot be entered. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B21/02B25B23/14B25B23/147B25D1/00
CPCB25B21/02B25B23/1405
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 MATSUSHITA ELECTRIC WORKS LTD