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1. 发明专利

JPH11513320A 失效
公开(公告)号：JPH11513320A
公开(公告)日：1999-11-16
申请号：JP51474397
申请日：1996-10-09
IPC分类号： B25D9/26 , B25D9/14 , B25D17/24 , E21B1/00 , E21B1/26 , E21C3/20

2. 发明专利

JPH1133932A SHOCK ABSORBING MECHANISM FOR HYDRAULIC HAMMERING DEVICE 失效
公开(公告)号：JPH1133932A
公开(公告)日：1999-02-09
申请号：JP19436697
申请日：1997-07-18
申请人： FURUKAWA CO LTD
发明人： KANEKO TSUTOMU
IPC分类号： B25D17/24 , E21B1/00 , E21B1/26 , E21C3/20
摘要： PROBLEM TO BE SOLVED: To reduce damage by smoothly buffering energy reflected from a shunk rod. SOLUTION: A rock drill has a hammering mechanism and a chuck driver bush 13 for transmitting thrust to a shunk rod 2. In such a rock drill, a front damping piston 4 having thrust smaller than that of a rock drill main body 1, and a rear damping piston 5 having the larger thrust are arranged on a rear side of the chuck driver bush 13. An oil passage 51 and an oil supply passage 53 are formed between a front damping piston oil chamber 42 and a rear damping piston oil chamber 52. The oil passage 51 is interrupted, when the front damping piston 4 retreats and before the front damping piston 4 collides with the rear damping piston 5. The oil supply passage 53 has a check valve 55 which prevents oil flow from the front damping piston oil chamber 42 to the rear damping piston oil chamber 52, and allows oil flow from the rear damping piston oil chamber 52 to the front damping piston oil chamber 42.

3. 发明专利

JPH10306677A PISTON STROKE CONTROL MECHANISM OF HYDRAULIC MACHINE DRILL 失效
公开(公告)号：JPH10306677A
公开(公告)日：1998-11-17
申请号：JP11301897
申请日：1997-04-30
申请人： FURUKAWA CO LTD
发明人： KANEKO TSUTOMU
IPC分类号： E21B1/26 , E21B1/00 , E21C3/20
摘要： PROBLEM TO BE SOLVED: To automatically control a piston stroke in response to change of rock quality by pilot-controlling the opening of a flow metering valve provided between a short stroke port and a valve control circuit by hydraulic pressure of the actuation circuit of an actuation mechanism. SOLUTION: In the hammering mechanism D of a hydraulic machine drill a short stroke port 23 is provided in front of a valve advancement control port 13 provided on a cylinder 2, connected to a valve control circuit 12 through a spool type flow metering valve 35, and the opening of the flow metering valve 35 is controlled by hydraulic pressure of the normal rotation side actuation circuit 31 of a rotation mechanism R. Thereby the change of the rotation resistance of a rod 22 in a drilling hole, namely, the stroke of a piston 1 is automatically controlled from the minimum to the maximum in response to the change of rock. In addition, when the flow metering valve 35 is connected with an operation seat by a pilot operation circuit, an operator can control a piston stroke on the operation seat. Furthermore, if the flow metering valve 35 is connected to the operation circuit of the feed mechanism of the rod 22, the piston stroke can be controlled by feed pressure.

4. 发明专利

JP2537370B2 失效
公开(公告)号：JP2537370B2
公开(公告)日：1996-09-25
申请号：JP18989487
申请日：1987-07-28
申请人： MAZDA MOTOR
发明人： FUJIKAWA KOZO
IPC分类号： E21B1/26 , E21B1/00 , E21C3/20

5. 发明专利

JPH089943B2 失效
公开(公告)号：JPH089943B2
公开(公告)日：1996-01-31
申请号：JP1933685
申请日：1985-02-05
IPC分类号： E21B1/26 , E21B1/00 , E21C3/20

6. 发明专利

JPH0742475A BORING DEVICE 失效
公开(公告)号：JPH0742475A
公开(公告)日：1995-02-10
申请号：JP19134293
申请日：1993-08-02
申请人： SAN GIKEN KK
发明人： TAZAKI RYUZO , KOZASA NOBORU
IPC分类号： E21B1/26 , E21B1/00 , E21B19/08 , E21B19/084 , E21B19/086 , E21C3/20 , E21C5/06
摘要： PURPOSE:To promote boring capacity in the case boring is made in a mass of concrete, a rock or a bedrock and, allow the device to twin in a small space. CONSTITUTION:A hydraulic driving type portable rock drill A is mounted to a driving device B mounted to a boom 21 of a drive-in truck C. The portable rock drill A has a rifle piston 4 inside a casing 3, with reciprocating movement of the piston 4, striking force and turning effort are transferred to a bit 1 through a rod 2. The driving device B provides a sprocket wheel 11a driven with a hydraulic motor 14 to a guide-cell-frame 10, a bed 13 is mounted to a chain 12 wrapped on the sprocket wheels 11a and 11b and, at the same time, the rock drill A is mounted to the bed 13. A miniaturized shovel is reconstructed to form the drive-in truck C. The portable rock drill A and driving device B are controlled at a driver's seat of the drive-in truck C.

7. 实用新型

JPH072776Y2 失效
公开(公告)号：JPH072776Y2
公开(公告)日：1995-01-25
申请号：JP17929585
申请日：1985-11-21
IPC分类号： E21B7/00 , E21B1/00 , E21B1/26 , E21B7/02 , H02G1/02 , E21C3/20

8. 发明专利

JPH06341403A ACCUMULATOR OF HYDRAULIC DOWN-THE-HOLE DRILL 失效
公开(公告)号：JPH06341403A
公开(公告)日：1994-12-13
申请号：JP12975993
申请日：1993-05-31
申请人： FURUKAWA CO LTD
发明人： OI TOSHIO
IPC分类号： E21B4/14 , E21B1/00 , E21B1/26 , E21B17/18 , F15B1/08 , F15B1/047 , E21C3/20
摘要： PURPOSE:To dispence with a protection net of accumulator of a hydraulic down-the-hole drill and improve response speed. CONSTITUTION:In a tube body 11 a multi-pipe structure is provided. A working oil path 17 and an annular space concentrical thereto are formed. The annular space is divided into a gas chamber 19 and oil chamber 20 by means of bladder 18 and in a partitioning pipe 14 between the chamber 20 and the path 17 an oil hole 23 is bored. A plurality of distance rings 30 having uneveness formed on a contact face are continuously formed on the oil chamber 20 side of the partition tube 14 so that each contact face faces the oil hole 23. When working oil flows out from the oil chamber 20 the bladder 218 is not brought into pressure contact with the oil hole directly and thus no damage is generated and a sufficient oil path is formed with the uneveness on the contact face of the ring 30 thereby generating no disturbance on the flow of oil.

9. 发明专利

JPH06328371A FLUID OPERATED SHOCK HAMMER 失效
公开(公告)号：JPH06328371A
公开(公告)日：1994-11-29
申请号：JP10416494
申请日：1994-05-18
申请人： KLEMM GUENTER
发明人： EMIIRU UEEBAA
IPC分类号： B25D9/12 , B25D9/14 , B25D9/26 , E02D11/00 , E21B1/00 , E21B1/26 , E21B4/14 , E21C3/20
摘要： PURPOSE: To provide a fluid operation impact hammer capable of not only advancing an object into the ground effectively but also simplifying pulling out greatly. CONSTITUTION: A work piston 22 gives an impact to a transmission element 23 connected with a drill rod to advance a drill pipe. When the drill rod is pulled up, the impact of the work piston 22 does not reach the transmission element 23. A control means 54 advancing a stop member 51 that the work piston 22 hits during return stroke is additionally provided at a rear end of a work cylinder 21. When the drill rod is pulled out, pulling out can be done easily because the operation is done by the impact of a hammer applied rearward.

10. 发明专利

JPH0647904B2 失效
公开(公告)号：JPH0647904B2
公开(公告)日：1994-06-22
申请号：JP3022587
申请日：1987-02-12
IPC分类号： E21B1/26 , B25D17/00 , E21B1/00 , E21C3/20

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