WO2010050667A2 - A saw-teeth type hydraulic jack - Google Patents
A saw-teeth type hydraulic jack Download PDFInfo
- Publication number
- WO2010050667A2 WO2010050667A2 PCT/KR2009/004578 KR2009004578W WO2010050667A2 WO 2010050667 A2 WO2010050667 A2 WO 2010050667A2 KR 2009004578 W KR2009004578 W KR 2009004578W WO 2010050667 A2 WO2010050667 A2 WO 2010050667A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- teeth
- holding member
- saw
- cylinder body
- hydraulic jack
- Prior art date
Links
- 210000002445 nipple Anatomy 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 238000003466 welding Methods 0.000 description 15
- 231100000241 scar Toxicity 0.000 description 7
- 238000010422 painting Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/36—Load-engaging elements
Definitions
- the present invention relates to a saw-teeth type hydraulic jack and, more particularly, to a saw-teeth type hydraulic jack which holds a work piece to prevent the deformation. According to the present invention, it is possible to hold the work piece trying to deform along the circular arc to compensate for the deformation. Mainly, however not limited thereto, the present invention is applied to a welding piece trying to deform by heat generated during the welding and keeps the position of the welding piece properly.
- a turnbuckle is generally used. That is, the turnbuckle is placed between the steel plate which stands upright and the base so that the turnbuckle supports the steel plate to prevent the deformation.
- the plate deforms along the circular arc and it is not possible for the turnbuckle to support the steel plate correspondingly against the deformation. Accordingly, the steel plate deviates from the welding position on the joining surface.
- the turnbuckle applies a large force on the base and causes a scar like a dent on the base. This scar cannot be hided by a painting and causes an aesthetic problem.
- the purpose of the present invention is to provide a saw-teeth type hydraulic jack which can hold a work piece correspondingly to the deformation. Also, the present invention provides a saw-teeth type hydraulic jack which can prevent the scar on the base. Mainly, not limited thereto, the present invention is directed to prevent the deformation of a welding piece to which welding is performed, the deformation caused by heat generated during the welding.
- the present invention provides a saw-teeth type hydraulic jack comprising: a cylinder body in which a hydraulic pressure room is provided; a spool valve mounted on the hydraulic pressure room; a movable holding member connected with a rod of the spool valve and protruding externally from the cylinder body, the movable holding member having a plurality of teeth formed on its end in the externally protrusion direction, wherein a line connecting the ends of the teeth forms a circular arc; an opposite holding member protruding externally from the cylinder body at the opposite to the movable holding member, the opposite holding member having a plurality of teeth formed on its end in the externally protrusion direction, wherein a line connecting the ends of the teeth forms a circular arc; wherein the circular arcs formed by the plural teeth of the movable holding member and the opposite holding member are symmetrical to each other; and a stand to stand the cylinder body to be inclined to a base.
- the opposite holding member is fixed to the cylinder body.
- the teeth formed on the movable holding member and the opposite holding member have a shape of saw-teeth.
- the cylinder body is provided with a hydraulic nipple through which hydraulic pressure is supplied.
- a spring is provided in the hydraulic pressure room for accumulating a restoring force against the expansion of the spool valve.
- the present invention provides the saw-teeth type hydraulic jack which can hold a work piece such as a welding piece correspondingly to the deformation. Also, present invention provides the saw-teeth type hydraulic jack which can prevent a big scar on a base.
- Figs. 1 and 2 are perspective views of a saw-teeth type hydraulic jack according to an embodiment of the present invention
- Fig. 3 is a sectional view of the saw-teeth type hydraulic jack showing the inside structure thereof;
- Figs. 4 and 5 show a work of the saw-teeth type hydraulic jack according to the embodiment of the present invention
- Figs. 6 and 7 show the saw-teeth type hydraulic jack on which a hand pump is mounted.
- Figs. 1 and 2 are perspective views of a saw-teeth type hydraulic jack 1000 according to the embodiment of the present invention.
- Fig. 3 is a sectional view of the saw-teeth type hydraulic jack 1000 showing the inside structure thereof, wherein a stand 10 is not viewed.
- the saw-teeth type hydraulic jack 1000 has a cylinder body 100 in which a hydraulic pressure room 300 is formed.
- a spool valve 500 is mounted on the hydraulic pressure room 300 in the cylinder body 100.
- a passage way 180 is formed on a side of the cylinder body 100 and a hydraulic nipple 80 is mounted on the passage way 180 as shown.
- the passage way 180 communicates with an external.
- a hydraulic pressure to the hydraulic room 300 from a hydraulic pump (not shown).
- a hydraulic pump (not shown).
- the hydraulic pressure is supplied to the hydraulic room 300.
- the spool valve 500 will move to left if the hydraulic pressure is supplied.
- the cylinder body 100 is divided into two parts 110 and 130 and they are coupled with each other.
- they can be coupled by bolts. (not shown)
- a ring 470 is provided around the spool of the spool valve 500 along the circumference thereof.
- the left side of the cylinder body 100 is open and a rod 540 of the spool valve 500 is externally protruded and a movable holding member 40 is coupled with the rod 540.
- a haft 48 of the movable holding member 40 is inserted into the rod 540 and the bolts 91 and 93 bolt the rod 540 and the movable holding member 40.
- a cavity part 350 is formed on the side of the passage way 180.
- a first spring holding member 410 is provided in the right side of the cavity part 350.
- the first spring holding member 410 is combined with the inside of the cylinder body 100 through a bolt 430.
- a second spring holding member 420 is provided in the left side of the cavity part 350.
- the second spring member 420 is combined with the rod 540 of the spool valve 500 through a bolt 450.
- a spring 88 is mounted across the spring holding members 410 and 420.
- the hydraulic pressure runs into the hydraulic pressure room 300 through the passage way 180 and moves the spool valve 500 to the left so that the movable holding member 40 moves to the left.
- a plurality of teeth 41 is formed on the end of the movable holding member 40 in the externally protrusion direction.
- the teeth 41 have a shape of saw-teeth and a line connecting the ends of the teeth 41 forms a circular arc.
- the line connecting the ends of the plural teeth 41 of the movable holding member 40 runs along the same radius R1 and forms a circular arc S1.
- an opposite holding member 60 is protruded in the cylinder body 100.
- the opposite holding member 60 may be fixed to the cylinder body 100.
- the opposite holding member 60 is inserted into the side of the cylinder body 100 and bolts 92 and 94 bolt the cylinder body 100 and the opposite holding member 60.
- a plurality of teeth 61 is formed on the end of the opposite holding member 60 in the externally protrusion direction.
- the teeth 61 have a shape of saw-teeth and a line connecting the ends of the plural teeth 61 forms a circular arc.
- the line connecting the ends of the plural teeth 61 of the opposite holding member 60 runs along the same radius R2 and forms a circular arc S2.
- the circular arcs S1 and S2 formed by the plural teeth 41 and 61 of the movable holding member 40 and the opposite holding member 60 are symmetrical to each other.
- a stand 10 is provided to stand the cylinder body 100 to be inclined to a base.
- a steel plate 900 standing upright is placed between a ceiling T and the base B and the saw-teeth type hydraulic jack 1000 is placed between the steel plate 900 and the base B as the cylinder body 100 is inclined.
- the hydraulic pump (not shown) is connected through the nipple 80.
- a coupler on the end of the hose of the hydraulic pump is inserted into the nipple 80 and coupled therewith.
- the steel plate 900 is trying to deform to rotate around the position A along the direction D1 by heat generated by the welding.
- the hydraulic pressure is supplied to the saw-teeth type hydraulic jack 1000 and the movable holding member 40 moves toward the base B and, accordingly, the opposite holding member 40 moves toward the steel plate 900. (Fig. 4)
- the lines connecting the ends of the plural teeth of the movable holding member 40 and the opposite holding member 60 take the circular arcs S1 and S2 symmetrical to each other.
- the plural teeth 41 of the movable holding member 40 are sequentially driven into the base B along the circular arc S1 and, correspondingly, the teeth 61 of the opposite holding member 60 sequentially push the steel plate 900 along the circular arc S2. (Fig. 5)
- the trace formed as the teeth 61 of the opposite holding member 60 push the steel plate 900 follows the direction D2 reverse to the direction D1 and it corresponds to the deformation or, at least, approximates to the deformation so that the steel plate 900 returns back to the original position.
- the steel plate 900 keeps the original position in this way and a welding for the position B on the base is performed.
- the saw-teeth type hydraulic jack 1000 holds the steel plate 900, which is the welding piece, the teeth 41 of the movable holding member 40 is stuck into the base B.
- the scar thereon is very minimal compared to that occurring when the turnbuckle is used and it may be hided by a painting thereon.
- Figs. 5 and 6 show the saw-teeth type hydraulic jack 1000 on which a hand pump 5000 is mounted.
- a pumping piston 908 repeatedly moves up and down and check valves 910 and 930 on the both sides of the lower part of the pumping piston 908 is reciprocally opened and closed to run out the hydraulic pressure in an oil tank 980 so that the hydraulic pressure is supplied to the hydraulic pressure room 300 in the cylinder body 100 through the passage way 180.
- the present invention provides the saw-teeth type hydraulic jack which can hold a work piece correspondingly to the deformation and prevent a big scar on the base.
- the saw-teeth type hydraulic jack according to the present invention is mainly applicable to the welding, however, it should be understood that it is not limited thereto.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
Description
Claims (5)
- A saw-teeth type hydraulic jack comprising:(a) a cylinder body in which a hydraulic pressure room is provided;(b) a spool valve mounted on the hydraulic pressure room;(c) a movable holding member connected with a rod of the spool valve and protruding externally from the cylinder body, the movable holding member having a plurality of teeth formed on its end in the externally protrusion direction, wherein a line connecting the ends of the teeth forms a circular arc;(d) an opposite holding member protruding externally from the cylinder body at the opposite to the movable holding member, the opposite holding member having a plurality of teeth formed on its end in the externally protrusion direction, wherein a line connecting the ends of the teeth forms a circular arc; wherein the circular arcs formed by the plural teeth of the movable holding member and the opposite holding member are symmetrical to each other; and(e) a stand to stand the cylinder body to be inclined to a base.
- The saw-teeth type hydraulic jack as recited in claim 1 wherein the opposite holding member is fixed to the cylinder body.
- The saw-teeth type hydraulic jack as recited in claim 1 or 2 wherein the teeth formed on the movable holding member and the opposite holding member have a shape of saw -teeth.
- The saw-teeth type hydraulic jack as recited in claim 3 wherein the cylinder body is provided with a hydraulic nipple through which hydraulic pressure is supplied.
- The saw-teeth type hydraulic jack as recited in claim 4 wherein a spring is provided in the hydraulic pressure room for accumulating a restoring force against the expansion of the spool valve.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010535897A JP5290316B2 (en) | 2008-10-31 | 2009-08-17 | Serrated hydraulic jack |
SG2011043015A SG172117A1 (en) | 2008-10-31 | 2009-08-17 | A saw-teeth type hydraulic jack |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2008-0107481 | 2008-10-31 | ||
KR1020080107481A KR100909216B1 (en) | 2008-10-31 | 2008-10-31 | Hydraulic-type holder for welding |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010050667A2 true WO2010050667A2 (en) | 2010-05-06 |
WO2010050667A3 WO2010050667A3 (en) | 2010-06-24 |
Family
ID=41337936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2009/004578 WO2010050667A2 (en) | 2008-10-31 | 2009-08-17 | A saw-teeth type hydraulic jack |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP5290316B2 (en) |
KR (1) | KR100909216B1 (en) |
CN (1) | CN101722392B (en) |
SG (1) | SG172117A1 (en) |
WO (1) | WO2010050667A2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011043577A2 (en) * | 2009-10-09 | 2011-04-14 | Kim Jin Hong | Hydraulic jockey |
KR200451544Y1 (en) * | 2010-06-09 | 2010-12-27 | 이명우 | Welding Jack |
KR200478756Y1 (en) | 2011-05-31 | 2015-11-20 | 대우조선해양 주식회사 | Jaw structure of apparatus for attachable vertical plate without welding |
KR101328644B1 (en) | 2012-03-30 | 2013-11-14 | 오성국 | Supporting member having teeth-shaped edge |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5396947A (en) | 1977-02-02 | 1978-08-24 | Entoropia Oi | Positioning device for heavy unit |
JPS5718065Y2 (en) | 1977-10-27 | 1982-04-15 | ||
CN2075572U (en) * | 1990-06-30 | 1991-04-24 | 张元杰 | Hydraulic clamp |
CN2097710U (en) * | 1991-08-19 | 1992-03-04 | 天津市焊接研究所 | Grip device |
JPH0565720U (en) * | 1992-02-21 | 1993-08-31 | 日産ディーゼル工業株式会社 | Wheel slipping escape device |
JPH09278388A (en) * | 1996-04-08 | 1997-10-28 | Maroole Kk | Rescuing tool in disaster |
KR100435866B1 (en) | 2001-10-12 | 2004-06-12 | 현대자동차주식회사 | Fixed-device of removal seat using oil-pressure |
JP2007022356A (en) * | 2005-07-19 | 2007-02-01 | Nissan Motor Co Ltd | Jack |
KR100825976B1 (en) * | 2008-01-30 | 2008-04-29 | (주) 대진유압기계 | Push jack for welding work |
-
2008
- 2008-10-31 KR KR1020080107481A patent/KR100909216B1/en active IP Right Grant
-
2009
- 2009-08-17 WO PCT/KR2009/004578 patent/WO2010050667A2/en active Application Filing
- 2009-08-17 JP JP2010535897A patent/JP5290316B2/en not_active Expired - Fee Related
- 2009-08-17 SG SG2011043015A patent/SG172117A1/en unknown
- 2009-09-25 CN CN2009101760612A patent/CN101722392B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2010050667A3 (en) | 2010-06-24 |
CN101722392A (en) | 2010-06-09 |
JP5290316B2 (en) | 2013-09-18 |
KR100909216B1 (en) | 2009-07-23 |
JP2010540381A (en) | 2010-12-24 |
CN101722392B (en) | 2013-02-13 |
SG172117A1 (en) | 2011-07-28 |
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