CN111120498A - Spiral shaft for spiral drilling machine with adjustable length - Google Patents
Spiral shaft for spiral drilling machine with adjustable length Download PDFInfo
- Publication number
- CN111120498A CN111120498A CN201911344315.7A CN201911344315A CN111120498A CN 111120498 A CN111120498 A CN 111120498A CN 201911344315 A CN201911344315 A CN 201911344315A CN 111120498 A CN111120498 A CN 111120498A
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- Prior art keywords
- arc
- hole
- shaped
- shaft
- rectangular
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- 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.)
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- 238000005553 drilling Methods 0.000 title abstract description 13
- 230000008878 coupling Effects 0.000 claims description 26
- 238000010168 coupling process Methods 0.000 claims description 26
- 238000005859 coupling reaction Methods 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
- F16C3/023—Shafts; Axles made of several parts, e.g. by welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/20—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using bayonet connections
Abstract
The invention discloses a spiral shaft with adjustable length for an auger drilling machine, which comprises a plurality of linearly spliced shaft joints, wherein each shaft joint comprises a circular shaft body and a rectangular cylinder, spiral blades are fixed on the outer wall of the circular shaft body, rectangular holes with openings at the upper sides and matched with the rectangular cylinders are arranged on the shaft joints, the rectangular cylinder of each shaft joint is inserted and sleeved in the rectangular hole of the next adjacent shaft joint, a plurality of fastening devices are arranged between the rectangular holes, and the lower end surface of the spiral blade of the previous shaft joint is attached to the upper end surface of the spiral blade of the next adjacent shaft joint. The length of the spiral shaft can be changed by increasing or decreasing the number of the shaft joints so as to meet different working condition requirements, and meanwhile, the shaft joints are convenient and quick to mount and dismount.
Description
Technical Field
The invention relates to the technical field of spiral drilling machines, in particular to a spiral shaft for an auger drilling machine with adjustable length.
Background
At present, with the gradual and intensive urban construction, the depth of foundation pit excavation is continuously increased, the pile length of a slope protection pile is increased, a spiral drilling machine is usually used for drilling, but the spiral shaft of the existing spiral drilling machine is integrated, the length of the spiral shaft cannot be changed, and when a certain part of the spiral shaft is scrapped, the whole spiral shaft is scrapped.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a spiral shaft for an auger drilling machine, which has adjustable length, can change the length of the spiral shaft by increasing or decreasing the number of shaft joints so as to meet different working condition requirements, and is convenient and quick to mount and dismount.
The scheme for solving the technical problems is as follows:
a spiral shaft for an auger drilling machine with adjustable length comprises a plurality of linearly spliced shaft joints, wherein the shaft joints comprise a circular shaft body and a rectangular cylinder which are integrally formed from top to bottom, spiral blades are fixed on the outer wall of the circular shaft body, the shaft joints are provided with rectangular holes with openings at the upper sides and matched with the rectangular cylinders, the rectangular cylinder of each shaft joint is inserted and sleeved in the rectangular hole of the next adjacent shaft joint, and a plurality of fastening devices are arranged between the rectangular holes, the fastening device comprises a sliding arc bolt, a first arc hole is arranged on the side wall of the rectangular cylinder, the side wall of the rectangular hole is provided with a second arc-shaped hole which is coaxial with the first arc-shaped hole, the outer half section of the arc-shaped bolt is inserted in the second arc-shaped hole, the inner half section of the arc-shaped bolt is inserted in the first arc-shaped hole, and the lower end face of the spiral blade of the previous spindle section is attached to the upper end face of the spiral blade of the next spindle section adjacent to the lower end face of the spiral blade of the previous spindle section.
The fastening device further comprises a pressing plate inserted in a large hole at the lower end of the step through hole, a plurality of steel balls are arranged between the pressing plate and the inner end of the arc bolt, the pressing plate is fixed at the lower end of a pressing rod, the pressing rod penetrates through the upper extending end of the step through hole and is pressed on the rectangular cylinder, a tension spring is sleeved on the pressing rod, and two ends of the tension spring are respectively fixed on the step surface of the step through hole and the pressing plate;
the fastening device also comprises an arc-shaped ejector rod inserted in the second arc-shaped hole, one end of the arc-shaped ejector rod is pressed against the outer end of the arc-shaped bolt, and a pressure spring is arranged between the other end of the arc-shaped ejector rod and the bottom surface of the second arc-shaped hole;
the rectangular hole of the shaft coupling at the uppermost side is inserted and sleeved and detachably fixed on the output shaft of the auger drill, and the output shaft of the auger drill is pressed against the pressure lever in the shaft coupling at the uppermost side.
The pore diameter of a large hole at the lower end of the step through hole and the ball diameter of the steel ball are equal to the pore diameter of the first arc-shaped hole.
The second arc-shaped hole comprises a small arc-shaped hole and a large arc-shaped hole, and the outer end of the arc-shaped bolt is inserted and sleeved in the small arc-shaped hole; the arc ejector pin includes little arc pole and big arc pole, and little arc pole presses the tip at the arc bolt, and big curved external diameter is greater than the aperture in little arc hole.
The both ends shaping of arc inserted bar has the chamfer, the chamfer is also respectively moulded to the one end in opposite directions in first arc hole and second arc hole.
The hole depth of the rectangular hole is larger than the height of the rectangular column.
The outer wall of the rectangular cylinder is formed with a rectangular ring groove, a sealing ring is sleeved in the rectangular ring groove, and the outer wall of the sealing ring is pressed against the inner wall of the rectangular hole.
The rectangular cylinder is provided with a through hole which penetrates through the rectangular cylinder in the front and back direction, a first pre-pressing rod and a second pre-pressing rod are sleeved in the through hole, a spring is clamped between the first pre-pressing rod and the second pre-pressing rod, ball socket holes which are coaxial with the through hole are formed in the front side wall and the back side wall of the rectangular hole respectively, ball heads are formed at the end parts of the first pre-pressing rod and the second pre-pressing rod, which face the corresponding ball socket holes respectively, and the ball heads are pressed in the ball socket holes.
The length of the small arc-shaped rod is half of that of the arc-shaped bolt.
The invention has the following outstanding effects: compared with the prior art, the length of the spiral shaft can be changed by increasing or decreasing the number of the shaft joints so as to meet different working condition requirements, and meanwhile, the shaft joints are convenient and quick to mount and dismount.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 4 is a partial schematic view of a single coupling and fastening device of the present invention.
Detailed Description
In an embodiment, as shown in fig. 1 to 4, a screw shaft for an auger machine with adjustable length includes a plurality of linearly spliced shaft joints 1, where the shaft joint 1 includes a circular shaft body 11 and a rectangular cylinder 12 integrally formed from top to bottom, a spiral blade 13 is fixed on an outer wall of the circular shaft body 11, the shaft joint 1 is provided with a rectangular hole 101 with an upper opening matched with the rectangular cylinder 12, the rectangular cylinder 12 of each shaft joint 1 is inserted and sleeved in the rectangular hole 101 of a next shaft joint 1 adjacent to the rectangular cylinder 12, and a plurality of fastening devices 2 are arranged between the rectangular hole 101 and the rectangular cylinder 12, each fastening device 2 includes a slidable arc-shaped plug pin 21, a first arc-shaped hole 121 is arranged on a side wall of the rectangular cylinder 12, a second arc-shaped hole 102 coaxially arranged with the first arc-shaped hole 121 is arranged on a side wall of the rectangular hole 101, an outer half section of the arc-shaped plug pin 21 is inserted and sleeved in the second arc-shaped hole 102, an inner half section of the arc-shaped plug pin 21 is inserted and, the lower end surface of the spiral blade 13 of the previous coupling 1 is attached to the upper end surface of the spiral blade 13 of the next coupling adjacent to the lower end surface.
Furthermore, a step through hole 103 for communicating the rectangular hole 101 with the first arc-shaped hole 121 is formed in the coupling 1, the fastening device 2 further comprises a pressing plate 22 inserted in a large hole at the lower end of the step through hole 103, a plurality of steel balls 23 are arranged between the pressing plate 22 and the inner end of the arc-shaped bolt 21, the pressing plate 22 is fixed at the lower end of a pressing rod 24, the pressing rod 24 penetrates through the upper extending end of the step through hole 103 and is pressed against the rectangular column 12, a tension spring 25 is sleeved on the pressing rod 24, and two ends of the tension spring 25 are respectively fixed on the step surface of the step through hole 103 and the pressing plate 22;
the fastening device 2 further comprises an arc-shaped ejector rod 26 inserted in the second arc-shaped hole 102, one end of the arc-shaped ejector rod 26 is pressed against the outer end of the arc-shaped bolt 21, and a pressure spring 27 is arranged between the other end of the arc-shaped ejector rod 26 and the bottom surface of the second arc-shaped hole 102;
the rectangular hole 101 of the uppermost coupling 1 is inserted and fixed on the output shaft of the auger drill in a detachable way, and the output shaft of the auger drill is pressed against the pressure rod 24 in the uppermost coupling 1.
Furthermore, the aperture of the large hole at the lower end of the stepped through hole 103 and the ball diameter of the steel ball 23 are equal to the aperture of the first arc-shaped hole 121.
Furthermore, the second arc-shaped hole 102 comprises a small arc-shaped hole 1021 and a large arc-shaped hole 1022, and the outer end of the arc-shaped bolt 21 is inserted in the small arc-shaped hole 1021; the arc-shaped ejector rod 26 comprises a small arc-shaped rod 261 and a large arc-shaped rod 262, the small arc-shaped rod 261 is pressed against the end part of the arc-shaped bolt 21, and the outer diameter of the large arc-shaped rod 262 is larger than the aperture of the small arc-shaped hole 1021.
Furthermore, chamfers are formed at two ends of the arc-shaped insertion rod 21, and chamfers are formed at opposite ends of the first arc-shaped hole 121 and the second arc-shaped hole 102.
Furthermore, the hole depth of the rectangular hole 101 is larger than the height of the rectangular column 12.
Furthermore, a rectangular ring groove is formed on the outer wall of the rectangular cylinder 12, a sealing ring 3 is sleeved in the rectangular ring groove, and the outer wall of the sealing ring 3 is pressed against the inner wall of the rectangular hole 101.
Furthermore, a through hole 122 is formed in the rectangular cylinder 12 and penetrates through the rectangular cylinder in the front-rear direction, the first pre-pressing rod 31 and the second pre-pressing rod 32 are sleeved in the through hole 122, the spring 33 is clamped between the first pre-pressing rod 31 and the second pre-pressing rod 32, a ball socket hole 103 which is coaxial with the through hole 122 is formed in each of the front side wall and the rear side wall of the rectangular hole 101, a ball head is formed at the end portion of each of the first pre-pressing rod 31 and the second pre-pressing rod 32, which faces to the corresponding ball socket hole 103, and the ball head is pressed in the ball socket hole 103.
Further, the length of the small arc-shaped rod 261 is half of the length of the arc-shaped latch 21.
The working principle is as follows: the shaft coupling installation process: firstly, the arc-shaped bolt 21 is completely pushed into the first arc-shaped hole 121, then the rectangular cylinder 12 of the new coupling 1 is inserted into the rectangular hole 101 of the original uppermost coupling 1, then the output shaft of the spiral drilling machine is inserted into the rectangular hole 101 of the new coupling 1, meanwhile, the output shaft of the spiral drilling machine presses the pressure lever 24 downwards, the pressure lever 24 drives the pressure block 22 to move downwards, at the moment, the tension spring 25 is further stretched, the pressure block 22 drives the steel ball 23 to move downwards, under the extrusion action of the steel ball 23, the outer half section of the arc-shaped bolt 21 is inserted into the small arc-shaped hole 1021 of the second arc-shaped hole 102, the outer half section of the arc-shaped bolt 21 pushes the arc-shaped ejector rod 26 inwards, the pressure spring 27 is further compressed, and the arc-shaped bolts are respectively inserted into the first arc-shaped hole 121 and the second arc-shaped hole 102, so that two adjacent couplings are fixed; the shaft coupling dismounting process: the output shaft of the rotary drilling machine is pulled out from the rectangular hole 101 of the uppermost shaft coupling 1, the pressing plate 22 moves upwards under the combined action of the tension spring 25, the arc-shaped ejector rod 26 pushes the outer half section of the arc-shaped bolt 21 into the first arc-shaped hole 121 under the action of the pressure spring 27, and then the rectangular cylinder 12 of the uppermost shaft coupling is pulled out from the rectangular hole of the next shaft coupling adjacent to the first arc-shaped hole.
Finally, the above embodiments are only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (9)
1. A screw shaft for an auger machine with adjustable length, comprising a plurality of linearly spliced shaft joints (1), characterized in that: the shaft coupling (1) comprises a circular shaft body (11) and a rectangular cylinder (12) which are integrally formed from top to bottom, a spiral blade (13) is fixed on the outer wall of the circular shaft body (11), the shaft coupling (1) is provided with a rectangular hole (101) which is opened at the upper side and is matched with the rectangular cylinder (12), the rectangular cylinder (12) of each shaft coupling (1) is inserted and sleeved in the rectangular hole (101) of the next shaft coupling (1) adjacent to the shaft coupling, a plurality of fastening devices (2) are arranged between the rectangular hole (101) and the rectangular hole, each fastening device (2) comprises a sliding arc-shaped bolt (21), the side wall of each rectangular cylinder (12) is provided with a first arc-shaped hole (121), the side wall of each rectangular hole (101) is provided with a second arc-shaped hole (102) which is coaxially arranged with the first arc-shaped hole (121), the outer half section of each arc-shaped bolt (21) is inserted and sleeved in the second arc-shaped hole (102), and the inner half section of each arc-shaped bolt (21), the lower end surface of the spiral blade (13) of the previous coupling (1) is jointed with the upper end surface of the spiral blade (13) of the next coupling adjacent to the lower end surface.
2. A length adjustable screw shaft for an auger machine according to claim 1, wherein: the fastening device comprises a shaft joint (1) and is characterized in that a step through hole (103) for communicating a rectangular hole (101) with a first arc-shaped hole (121) is formed in the shaft joint (1), the fastening device further comprises a pressing plate (22) inserted in a large hole at the lower end of the step through hole (103), a plurality of steel balls (23) are arranged between the pressing plate (22) and the inner end of an arc-shaped bolt (21), the pressing plate (22) is fixed at the lower end of a pressing rod (24), the pressing rod (24) penetrates through the upper extending end of the step through hole (103) and is pressed on a rectangular cylinder (12), a tension spring (25) is sleeved on the pressing rod (24), and two ends of the tension spring (25) are respectively fixed on the step surface of the step through hole (;
the fastening device (2) further comprises an arc-shaped ejector rod (26) inserted in the second arc-shaped hole (102), one end of the arc-shaped ejector rod (26) is pressed against the outer end of the arc-shaped bolt (21), and a pressure spring (27) is arranged between the other end of the arc-shaped ejector rod (26) and the bottom surface of the second arc-shaped hole (102);
the rectangular hole (101) of the uppermost shaft coupling (1) is inserted and sleeved and detachably fixed on the output shaft of the auger drill, and the output shaft of the auger drill is pressed against the pressure rod (24) in the uppermost shaft coupling (1).
3. A length adjustable screw shaft for an auger machine according to claim 2, wherein: the pore diameter of a large pore at the lower end of the step through hole (103) and the ball diameter of the steel ball (23) are equal to the pore diameter of the first arc-shaped hole (121).
4. A length adjustable screw shaft for an auger machine according to claim 2, wherein: the second arc-shaped hole (102) comprises a small arc-shaped hole (1021) and a large arc-shaped hole (1022), and the outer end of the arc-shaped bolt (21) is inserted and sleeved in the small arc-shaped hole (1021); arc ejector pin (26) are including little arc pole (261) and big arc pole (262), and little arc pole (261) press the tip of arc bolt (21), and the external diameter of big arc (262) is greater than the aperture of little arc hole (1021).
5. A length adjustable screw shaft for an auger machine according to claim 1 or claim 2, wherein: chamfers are formed at two ends of the arc-shaped inserting rod (21), and chamfers are formed at opposite ends of the first arc-shaped hole (121) and the second arc-shaped hole (102).
6. A length adjustable screw shaft for an auger machine according to claim 1, wherein: the hole depth of the rectangular hole (101) is larger than the height of the rectangular column (12).
7. A length adjustable screw shaft for an auger machine according to claim 1, wherein: the outer wall of the rectangular cylinder body (12) is formed with a rectangular ring groove, a sealing ring (3) is sleeved in the rectangular ring groove, and the outer wall of the sealing ring (3) is pressed on the inner wall of the rectangular hole (101).
8. A length adjustable screw shaft for an auger machine according to claim 1, wherein: the rectangular cylinder (12) is formed with a through hole (122) which penetrates through the front and the back, a first pre-pressing rod (31) and a second pre-pressing rod (32) are sleeved in the through hole (122), a spring (33) is clamped between the first pre-pressing rod (31) and the second pre-pressing rod (32), ball socket holes (103) which are coaxially arranged with the through hole (122) are formed in the front side wall and the back side wall of the rectangular hole (101), ball heads are formed at the end parts, facing the corresponding ball socket holes (103), of the first pre-pressing rod (31) and the second pre-pressing rod (32), and the ball heads are pressed in the ball socket holes (103).
9. A length adjustable screw shaft for an auger machine according to claim 4, wherein: the length of the small arc-shaped rod (261) is half of the length of the arc-shaped bolt (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911344315.7A CN111120498B (en) | 2019-12-24 | 2019-12-24 | Spiral shaft for spiral drilling machine with adjustable length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911344315.7A CN111120498B (en) | 2019-12-24 | 2019-12-24 | Spiral shaft for spiral drilling machine with adjustable length |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111120498A true CN111120498A (en) | 2020-05-08 |
| CN111120498B CN111120498B (en) | 2020-12-25 |
Family
ID=70501689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911344315.7A Active CN111120498B (en) | 2019-12-24 | 2019-12-24 | Spiral shaft for spiral drilling machine with adjustable length |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111120498B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4025243A1 (en) * | 1990-08-09 | 1992-02-13 | Schmidt & Co Gmbh Kranz | Drill rod assembly for exploratory and other drilling - has hollow drill rods having continuous outer spirals, clear internal passages, polygonal ends and spring-loaded locking pins |
| US6056473A (en) * | 1996-10-05 | 2000-05-02 | Schaefer; Erhard | Changing device for shaft/hub connections |
| US20050177943A1 (en) * | 2004-01-08 | 2005-08-18 | Traverse Rescue Llc | Rail coupling and lock for split-apart basket stretchers |
| CN1837571A (en) * | 2006-02-27 | 2006-09-27 | 张雄伟 | Telescopic drill rod and telescopic long spiral drilling device |
| CN101294481A (en) * | 2008-06-03 | 2008-10-29 | 河北冀凯实业集团有限公司 | High-efficiency helical water-through jackrod |
| CN201843534U (en) * | 2010-10-08 | 2011-05-25 | 王海峰 | Quick-connect auger stem used for roadway supporting and anchoring |
| CN202707723U (en) * | 2012-06-18 | 2013-01-30 | 中国航空工业集团公司西安飞机设计研究所 | Butt joint structure of connecting rods |
| CN203321358U (en) * | 2013-05-31 | 2013-12-04 | 王海峰 | Spring positioning pin for connection of plug-in drill pipe |
| US20190085640A1 (en) * | 2016-02-08 | 2019-03-21 | Smart Drilling GmbH | Drilling tool for sinking automatically directionally monitored bores |
-
2019
- 2019-12-24 CN CN201911344315.7A patent/CN111120498B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4025243A1 (en) * | 1990-08-09 | 1992-02-13 | Schmidt & Co Gmbh Kranz | Drill rod assembly for exploratory and other drilling - has hollow drill rods having continuous outer spirals, clear internal passages, polygonal ends and spring-loaded locking pins |
| US6056473A (en) * | 1996-10-05 | 2000-05-02 | Schaefer; Erhard | Changing device for shaft/hub connections |
| US20050177943A1 (en) * | 2004-01-08 | 2005-08-18 | Traverse Rescue Llc | Rail coupling and lock for split-apart basket stretchers |
| CN1837571A (en) * | 2006-02-27 | 2006-09-27 | 张雄伟 | Telescopic drill rod and telescopic long spiral drilling device |
| CN101294481A (en) * | 2008-06-03 | 2008-10-29 | 河北冀凯实业集团有限公司 | High-efficiency helical water-through jackrod |
| CN201843534U (en) * | 2010-10-08 | 2011-05-25 | 王海峰 | Quick-connect auger stem used for roadway supporting and anchoring |
| CN202707723U (en) * | 2012-06-18 | 2013-01-30 | 中国航空工业集团公司西安飞机设计研究所 | Butt joint structure of connecting rods |
| CN203321358U (en) * | 2013-05-31 | 2013-12-04 | 王海峰 | Spring positioning pin for connection of plug-in drill pipe |
| US20190085640A1 (en) * | 2016-02-08 | 2019-03-21 | Smart Drilling GmbH | Drilling tool for sinking automatically directionally monitored bores |
Non-Patent Citations (1)
| Title |
|---|
| 姜秀丽，高进，靳宣强，林朋朋: "螺旋机传动轴的焊接及耐磨层检测工装分析", 《现代制造技术与装备》 * |
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| Publication number | Publication date |
|---|---|
| CN111120498B (en) | 2020-12-25 |
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Effective date of registration: 20201208 Address after: 313000 north side of National Road 318 and east side of east suburb sewage treatment plant in Zhili Town, Huzhou City, Zhejiang Province Applicant after: Zhejiang Lisheng New Material Technology Co.,Ltd. Address before: 523000 Building 1, No.17, Guangming Road, Dongcheng Street, Dongcheng District, Dongguan City, Guangdong Province Applicant before: Dongguan Zhijian Electromechanical Engineering Technology Co.,Ltd. |
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Denomination of invention: Screw shaft for screw drill with adjustable length Effective date of registration: 20211228 Granted publication date: 20201225 Pledgee: Huzhou Wuxing Rural Commercial Bank Co.,Ltd. high tech Zone Green sub branch Pledgor: Zhejiang Lisheng New Material Technology Co.,Ltd. Registration number: Y2021330002697 |
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Date of cancellation: 20231013 Granted publication date: 20201225 Pledgee: Huzhou Wuxing Rural Commercial Bank Co.,Ltd. high tech Zone Green sub branch Pledgor: Zhejiang Lisheng New Material Technology Co.,Ltd. Registration number: Y2021330002697 |