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Hammer drill

A hammer drill and air cylinder technology, which is applied in the field of rotating force transmission mechanism, can solve the problems such as the inability to adjust the angle of the operating tool and the inability to replace it.

Active Publication Date: 2008-09-03
KOKI HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the power switch is turned on during this time, the user cannot replace the operating tool or adjust the angle of the operating tool because impact force is applied to the operating tool

Method used

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no. 1 example

[0027] figure 1 It is a side view of a hammer drill according to an embodiment of the present invention. Such as figure 1 The illustrated hammer drill 1 can be operated in four modes: rotation and impact mode, rotation only mode, impact only mode, and intermediate mode. The hammer drill 1 includes a housing 2 for accommodating an impact force transmission mechanism, a rotation force transmission mechanism, and a switching mechanism which will be described later.

[0028] The hammer drill 1 includes a housing 2 ( figure 1 The right end) on the rear end of the handle 3; ON / OFF switch 4 arranged on the handle 3; connected to the handle 3 for supplying electricity to the electric wire 5 of the hammer drill 1; rotatably arranged on one of the housing 2 The dial-type switching member 6 for switching the operation mode on the side; and is provided close to the front end of the housing 2 and protrudes laterally (toward the figure 1 The observer) of the auxiliary handle 7.

[0029] An...

no. 2 example

[0077] Next, a hammer drill according to a second embodiment of the present invention will be explained with reference to FIGS. 11 and 12.

[0078] 11 is a vertical cross-sectional view of the hammer drill 101 in the rotation-only mode according to the second embodiment of the present invention, and FIG. 12 is the vertical cross-sectional view of the hammer drill 101 in the rotation and impact mode according to the second embodiment of the present invention Cross-sectional view, in which similar parts and components use the same reference numerals to avoid repetitive description.

[0079] In the hammer drill 101 according to the second embodiment, the air cylinder 117 is held to be able to move in the front-rear direction. The bevel gear 34 is fitted around the outer circumference of the cylinder 117 on the rear end through spline fitting, and the cylinder 117 can move back and forth relative to the bevel gear 34. The air cylinder 117 rotates together with the bevel gear 34. In th...

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PUM

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Abstract

A switching mechanism switches on and off transmission of a striking force to a working tool, and switches on and off transmission of a rotational force to the working tool, thereby switching operation modes among at least a rotation and strike mode, a strike only mode, and a neutral mode. A rotation locking mechanism engages a cylinder during the strike only mode, thereby locking rotation of the cylinder. During the neutral mode, the transmission of the striking force, the transmission of the rotational force, and the locking of rotation of the cylinder are all turned off.

Description

Technical field [0001] The present invention relates to a hammer drill used as a hammer and a drill function, and includes an impact force transmission mechanism for applying impact force to an operating tool, and a rotational force transmission mechanism for transmitting rotational force to the operating tool. Background technique [0002] Hammer drills equipped with an impact force transmission mechanism and a rotation force transmission mechanism traditionally have three operating modes: rotation and impact mode for applying impact force to the operating tool while driving the operating tool to rotate; Rotation-only mode; and impact-only mode for applying impact force to the operating tool. This type of hammer drill requires an operation mode switching mechanism to switch the operation mode according to the required operation. [0003] One such operation mode switching mechanism is proposed in US Patent No. 6,557,648 (corresponding to Japanese Patent Application Publication No...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25D16/00B23B45/16B25F3/00
CPCB25D2211/068B25D2216/0015B25D16/006B25D2216/0023B25D2250/035B25D2211/003B25D2216/0046B25D2216/0038
Inventor 山崎真护
Owner KOKI HLDG CO LTD