JPH0479073U - - Google Patents
Info
- Publication number
- JPH0479073U JPH0479073U JP12347990U JP12347990U JPH0479073U JP H0479073 U JPH0479073 U JP H0479073U JP 12347990 U JP12347990 U JP 12347990U JP 12347990 U JP12347990 U JP 12347990U JP H0479073 U JPH0479073 U JP H0479073U
- Authority
- JP
- Japan
- Prior art keywords
- drill bit
- holding
- drill
- holder
- steel ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims 1
Landscapes
- Percussive Tools And Related Accessories (AREA)
- Gripping On Spindles (AREA)
Description
図は本考案の電気ハンマドリルの工具保持装置
を示す断面図である。図において、１はドリルビ
ツト、２は保持部、３は嵌合凸部、４はホルダ、
５はスプライン、６は鋼球、７はスプリング、８
は中間子、９は打撃子、１０はシリンダである。
The figure is a sectional view showing the tool holding device of the electric hammer drill of the present invention. In the figure, 1 is a drill bit, 2 is a holding part, 3 is a fitting convex part, 4 is a holder,
5 is a spline, 6 is a steel ball, 7 is a spring, 8
is a meson, 9 is a striker, and 10 is a cylinder.
Claims (1)
持部とを備え、前記ドリルビツトに打撃力および
回転力を与えて打撃穿孔を行なう電気ハンマドリ
ルにおいて、前記保持部が工具軸方向にストロー
クを有し埋設されたドリルビツトを保持するスチ
ールボールと前記ドリルビツトシヤンク部の溝と
結合しトルク伝達する凸部を内壁に設けられ、さ
らに前記保持部を回転伝達可能に案内するホルダ
の内壁の一部を円錐状に形成し、該円錐面に前記
保持部内のスチールボールをスプリングでドリル
ビツト方向に押しつけて成る電気ハンマドリルの
工具保持装置。 An electric hammer drill that includes a drill bit and a holding part that holds the drill bit, and performs impact drilling by applying impact force and rotational force to the drill bit, wherein the holding part has a stroke in the tool axis direction and is capable of holding a buried drill bit. The inner wall of the holder is provided with a convex portion that connects the steel ball to be held to the groove of the drill bit shank portion and transmits torque, and further, a portion of the inner wall of the holder that guides the holding portion so as to transmit rotation is formed in a conical shape. A tool holding device for an electric hammer drill comprising a steel ball in the holding portion pressed against the conical surface in the direction of the drill bit by a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12347990U JPH0479073U (en) | 1990-11-22 | 1990-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12347990U JPH0479073U (en) | 1990-11-22 | 1990-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0479073U true JPH0479073U (en) | 1992-07-09 |
Family
ID=31871183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12347990U Pending JPH0479073U (en) | 1990-11-22 | 1990-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0479073U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010029954A (en) * | 2008-07-25 | 2010-02-12 | Yamashita Kogyo Kenkyusho:Kk | Bit adapter for hammer drill |
-
1990
- 1990-11-22 JP JP12347990U patent/JPH0479073U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010029954A (en) * | 2008-07-25 | 2010-02-12 | Yamashita Kogyo Kenkyusho:Kk | Bit adapter for hammer drill |
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