JPH02136189U - - Google Patents
Info
- Publication number
- JPH02136189U JPH02136189U JP4536489U JP4536489U JPH02136189U JP H02136189 U JPH02136189 U JP H02136189U JP 4536489 U JP4536489 U JP 4536489U JP 4536489 U JP4536489 U JP 4536489U JP H02136189 U JPH02136189 U JP H02136189U
- Authority
- JP
- Japan
- Prior art keywords
- circumferential surface
- driver sub
- excavation
- mounting shaft
- key
- 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
- 238000009412 basement excavation Methods 0.000 claims 6
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000005553 drilling Methods 0.000 description 7
Landscapes
- Earth Drilling (AREA)
Description
第１図は掘削ドリルの断面図、第２図は第１考
案の掘削ドリル用ビツトの一実施例を示す正面図
、第３図は第２図の−線断面図、第４図は第
３図の要部拡大図、第５図は第２考案の掘削ドリ
ル用ビツトの一実施例を示す正面図、第６図は第
５図の−線断面図、第７図は従来の掘削ドリ
ル用ビツトの正面図、第８図は第７図の−線
断面図、である。
Ａ……掘削ドリル、１……掘削ドリル用ビツト
、２……取付軸、３……刃先部、４……溝、５…
…キー溝、６……ドライバーサブ、７……溝、８
……キー孔、９……雄ねじ、１０……くさび、１
１……スプライン、１２……溝、１３……キー、
１４……抜け止め溝、１５……抜け止め端部、１
６……ワツシヤー、１７……ピストン、１８……
ハンマーケース。
Figure 1 is a sectional view of the drilling drill, Figure 2 is a front view showing an embodiment of the drilling drill bit of the first invention, Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4 is the Fig. 5 is a front view showing an embodiment of the second invention bit for drilling drills, Fig. 6 is a sectional view taken along the line - - of Fig. 5, and Fig. 7 is a conventional drilling bit for drilling bits. 8 is a front view of the bit, and FIG. 8 is a sectional view taken along the line -- in FIG. A...Drilling drill, 1...Drilling drill bit, 2...Mounting shaft, 3...Blade tip, 4...Groove, 5...
...Keyway, 6...Driver sub, 7...Groove, 8
...Key hole, 9...Male thread, 10...Wedge, 1
1...Spline, 12...Groove, 13...Key,
14... Retaining groove, 15... Retaining end, 1
6... Washer, 17... Piston, 18...
hammer case.
Claims (1)
空円筒状のドライバーサブを介して着脱自在に取
り付けられ、刃先部と取付軸とからなる掘削ドリ
ル用ビツトであつて、 前記ドライバーサブ内周面には、軸方向に断面
略半円状の溝を複数形成し、 ドライバーサブ内周面と当接する取付軸外周面
には軸方向に断面略半円状の溝を複数形成し、 前記ドライバーサブ内周面と取付軸外周面の間
には、双方の溝に当接する丸棒状のくさびを複数
着脱可能に挿入してなることを特徴とする掘削用
ドリル用ビツト。 (2) 掘削ドリルのハンマーケース先端に、略中
空円筒状のドライバーサブを介して着脱自在に取
り付けられ、刃先部と取付軸とからなる掘削ドリ
ル用ビツトであつて、 前記ドライバーサブには軸直角方向に貫通する
キー孔を穿設し、 ドライバーサブ内周面と当接する取付軸外周面
には、前記キー孔と対応するキー溝を形成し、 前記キー孔またはキー溝のいずれか一方は、軸
方向をキーの径より長さに形成し、 前記キー孔にはキーを着脱可能に挿入してなる
ことを特徴とする掘削用ドリル用ビツト。[Scope of Claim for Utility Model Registration] (1) An excavation drill bit that is detachably attached to the tip of the hammer case of an excavation drill via a substantially hollow cylindrical driver sub, and that consists of a cutting edge and a mounting shaft. , a plurality of grooves each having a substantially semicircular cross section are formed in the axial direction on the inner circumferential surface of the driver sub, and grooves each having a substantially semicircular cross section in the axial direction are formed on the outer circumferential surface of the mounting shaft that contacts the inner circumferential surface of the driver sub. A drill bit for excavation, characterized in that a plurality of wedges are formed, and a plurality of round bar-shaped wedges are removably inserted between the inner circumferential surface of the driver sub and the outer circumferential surface of the mounting shaft, the wedges abutting both grooves. (2) An excavation drill bit that is detachably attached to the tip of a hammer case of an excavation drill via a substantially hollow cylindrical driver sub, and is composed of a cutting edge and a mounting shaft, the driver sub having a diameter perpendicular to the axis. A key hole penetrating in the direction is formed, and a key groove corresponding to the key hole is formed on the outer circumferential surface of the mounting shaft that contacts the inner circumferential surface of the driver sub, and either the key hole or the key groove is 1. A drill bit for excavation, characterized in that the length in the axial direction is longer than the diameter of the key, and the key is removably inserted into the key hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4536489U JPH02136189U (en) | 1989-04-18 | 1989-04-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4536489U JPH02136189U (en) | 1989-04-18 | 1989-04-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02136189U true JPH02136189U (en) | 1990-11-13 |
Family
ID=31559474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4536489U Pending JPH02136189U (en) | 1989-04-18 | 1989-04-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02136189U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5816437A (en) * | 1981-07-21 | 1983-01-31 | Toshiba Corp | Manufacture of explosion-proof type cathode-ray tube |
| JPS6323508U (en) * | 1986-07-28 | 1988-02-16 |
-
1989
- 1989-04-18 JP JP4536489U patent/JPH02136189U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5816437A (en) * | 1981-07-21 | 1983-01-31 | Toshiba Corp | Manufacture of explosion-proof type cathode-ray tube |
| JPS6323508U (en) * | 1986-07-28 | 1988-02-16 |
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