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Rotational impact tool

A technology of impact tools and rotation direction, applied in the field of rotary impact tools, can solve problems such as anvil rotation restrictions, achieve the effect of suppressing noise and vibration, and prolonging service life

Inactive Publication Date: 2015-04-22
KOKI HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, after screwing, the rotation of the anvil is restricted when the resistance to rotation becomes greater relative to the anvil

Method used

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Embodiment Construction

[0032] Best Mode for Carrying Out the Invention

[0033] will be in reference Figure 1 to Figure 8 While describing an impact wrench as a rotary impact tool according to one embodiment of the present invention, the same components and components are denoted by the same reference numerals to avoid duplication of description. It is to be noted that the rotary impact tool is not limited to the impact wrench as far as the tool includes a structure for avoiding the collision of the cam end.

[0034] figure 1 The impact wrench 1 shown in is a tool for tightening screws, screw rods, nuts, etc. as in figure 1 As shown in , an impact wrench 1 mainly includes a main body housing 2 , a handle housing 3 , a motor 4 , a gear mechanism 5 , a hammer 6 and an anvil 7 . The hammer 6 and the anvil 7 constitute an impact mechanism.

[0035] In the ensuing description, figure 1 The left side of impact wrench 1 in will be defined as the front side, while figure 1 The right side in will be ...

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PUM

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Abstract

A rotational impact tool including: a motor (4); a spindle (23); a hammer (6); a first resilient member (22); and an anvil (7). The motor generates a drive force. The spindle rotates in a rotating direction upon transmission of the drive force from the motor. The spindle has an axis extending in an axial direction that includes a first direction and a second direction opposite to the first direction. The hammer moves in the rotational direction and in the axial direction relative to the spindle to generate a rotational impact force. The first resilient member urges the hammer in the first direction. The anvil transmits the rotational impact force to an end bit. The rotational impact tool further includes a second resilient member (21). The second resilient member is disposed at a position radially outward of the first resilient member and is configured to abut the hammer when the hammer moves in the second direction.

Description

technical field [0001] The present invention relates to a rotary impact tool for fastening screws, screw rods, nuts etc. to workpieces. Background technique [0002] An impact wrench is disclosed in Japanese Patent Application Laid-Open No. 2012-66344 as a rotary impact tool for fastening a screw, screw, nut, etc. to a workpiece. A rotary impact tool mainly includes a large-sized impact mechanism with a hammer and anvil, a reduction mechanism and a spindle. The hammer is pushed forward by a spring provided between the reduction mechanism and the main shaft. For example, after screwing, when the rotation resistance becomes greater relative to the anvil, the rotation of the anvil is restricted. The hammer is then moved back against the urging force of the spring to bypass the protrusion of the anvil and it is accelerated to exert an impact on the anvil. By repeating this impact operation, the rotational impact force is continuously or intermittently transmitted to the drill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B21/02
CPCB25B21/026B25B21/02
Inventor 田所直树坂井裕纪
Owner KOKI HLDG CO LTD
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