JPS6442878U

JPS6442878U -

Info

Publication number: JPS6442878U
Application number: JP13694887U
Authority: JP
Priority date: 1987-09-08
Filing date: 1987-09-08
Publication date: 1989-03-14

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示すものであつて
、第１図ａは電動式打撃工具の構成を示す正面断
面図、第１図ｂはストライカがチゼルに後突する
位置に達した状態を示す正面断面図、第１図ｃは
ストライカが本体におけるスプライン孔の後端位
置付近に達した状態を示す正面断面図、第２図お
よび第３図はそれぞれ他の実施例を示し、第２図
ａはストライカと抜止め部材との間にスプリング
を介在させた場合の電動式打撃工具の構成を示す
正面断面図、第２図ｂはストライカがチゼルに後
突する位置に達した状態を示す正面断面図、第２
図ｃはストライカが本体におけるスプライン孔の
後端位置付近に達した状態を示す正面断面図、第
３図ａはストライカと抜止め部材との間にガスを
封入した場合の電動式打撃工具の構成を示す正面
断面図、第３図ｂはストライカがチゼルに後突す
る位置に達した状態を示す正面断面図、第３図ｃ
はストライカが本体におけるスプライン孔の後端
位置付近に達した状態を示す正面断面図である。１２は電動機、１４は回動軸、１４ａはねじ部
、１５はストライカ、１５ａはねじ部、１６はチ
ゼル（打撃部材）、１８，１９は検出手段、２０
は制御手段である。 Figure 1 shows an embodiment of the present invention, in which Figure 1a is a front cross-sectional view showing the configuration of an electric impact tool, and Figure 1b is a diagram showing the striker reaching the position where it rear-ends the chisel. Fig. 1c is a front sectional view showing the state in which the striker has reached near the rear end position of the spline hole in the main body; Figs. 2 and 3 each show other embodiments; Figure 2a is a front sectional view showing the structure of an electric impact tool when a spring is interposed between the striker and the retaining member, and Figure 2b shows the state where the striker has reached the position where it collides with the chisel from behind. Front sectional view shown, second
Figure c is a front sectional view showing the striker reaching near the rear end of the spline hole in the main body, and Figure 3a is the configuration of the electric impact tool when gas is sealed between the striker and the retaining member. Figure 3b is a front sectional view showing the striker reaching the position where it rear-ends the chisel, Figure 3c
FIG. 2 is a front cross-sectional view showing a state in which the striker has reached near the rear end position of the spline hole in the main body. 12 is an electric motor, 14 is a rotating shaft, 14a is a threaded portion, 15 is a striker, 15a is a threaded portion, 16 is a chisel (impacting member), 18 and 19 are detection means, 20
is a control means.

Claims

[Claims for Utility Model Registration] A rotating shaft having a threaded portion formed on the outer periphery and rotated by an electric motor; a striker that is threadedly engaged with the threaded portion and is slidably but unrotatably provided in the axial direction of the rotating shaft; a striking member that is provided in front of the striker and generates a striking force when struck from behind by the striker; An electric impact tool comprising: at least one detection means for detecting the axial position of a striker; and a control means for controlling operation of an electric motor based on a signal from the detection means.