CN201914839U - Hydraulic vertical and horizontal coil overhead turnover clamp - Google Patents
Hydraulic vertical and horizontal coil overhead turnover clamp Download PDFInfo
- Publication number
- CN201914839U CN201914839U CN2010206834818U CN201020683481U CN201914839U CN 201914839 U CN201914839 U CN 201914839U CN 2010206834818 U CN2010206834818 U CN 2010206834818U CN 201020683481 U CN201020683481 U CN 201020683481U CN 201914839 U CN201914839 U CN 201914839U
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- clamp
- moving caliper
- fixed clamp
- slide block
- chain
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Abstract
The utility model relates to a hydraulic vertical and horizontal coil overhead turnover clamp, which comprises a horizontal rotating part, a turnover part, a clamp part, a hydraulic part, a chain assembly and a control assembly. The clamp is capable of hanging a steel coil in the air and turning over a horizontal coil into a vertical coil or turning over the vertical coil into the horizontal coil. The production efficiency is improved and the cost is saved. Moreover, the convenience and the safety of the operation are improved through the actuation of the control part.
Description
Technical field
The utility model relates to a kind of equipment that is used for coil of strip handling, upset operation.
Background technology
The location mode of general coil of strip has two states, i.e. horizontal roll state and perpendicular volume state.In the production and transportation of coil of strip, need adjust the laying state of coil of strip according to actual conditions.For example, the coil of strip horizontal roll rolls off the production line but needs perpendicular rolling truck, needs to carry out steel-coil overturning in this process.Be to solve the technical matters of steel-coil overturning, usually adopt the operation that cooperatively interacts of perpendicular coil clamp, horizontal coil clamp and ground down-ender in the prior art.Yet this mode has increased productive costs.
Summary of the invention
At the technical matters that exists in the prior art, the utility model provides a kind of novel clamp of hanging below hoisting crane, this clamp can will lift by crane in the air after horizontal roll (centre hole is the coil of strip of the horizontality) clamping, is turned into perpendicular volume (centre hole is the coil of strip of vertical state) then aloft; Perhaps will erect and be turned into horizontal roll aloft after entrainment is held.
A kind of hydraulic pressure erects the aerial overturning clamp of horizontal roll, it is characterized in that: comprise horizontally rotating part 100, flip portion 200, clamp part 600, hydraulic part 800, chain assemblies 500 and control part;
Flip portion, wherein overturning drive device 1 comprises upset HM Hydraulic Motor and upset reductor; Overturning drive device 1 interconnects assembling with pinion shaft 2, all is positioned at the bottom of turnover body 7; Pinion shaft 2 is connected with a joggle with big gear wheel 6; Main shaft 5 passes big gear wheel 6 middle parts and is connected with big gear wheel 6, and main shaft 5 and two groups of sprocket wheels 3 interconnect transmission; The chain 4 of an open loop of cross-over connection respectively on every group of sprocket wheel, the bottom of every chain is connected with the two ends of clamp part respectively; After big gear wheel 6, two groups of sprocket wheels 3 and rope delivery device are assemblied on the main shaft 5, again by the top of bearing installation in turnover body 7;
The clamp part comprises fixed clamp 11 and moving caliper 19; Have driving clamping device 8, described driving clamping device comprises the clamping hydraulic motor, and the clamping hydraulic motor is connected with leading screw 10 afterwards by bearing installation on fixed clamp 11 tops by coupler 9; Fixed clamp slide block 14 and fixed clamp slide block retracing spring 13 are installed in fixed clamp 11 bottoms; Slip is arranged when fixed clamp 11 and 14 operations of fixed clamp slide block, be provided with steel guide rail pair 12 between fixed clamp 11 and the fixed clamp slide block 14, steel guide rail pair 12 is two micro-finishing cuboids, be installed in respectively on fixed clamp and the fixed clamp slide block, being marked with grease between described two micro-finishing cuboids, is cliding friction during operation; The right side of fixed clamp 11 is beams of a square-section, and the top and bottom of beam are installed with steel guide rail 23; A square hole on moving caliper 19 tops is sleeved on the beam on right side of fixed clamp 11, the bottom of described square hole is installed with 4 T shape back-up blocks 22, arc back-up block 17 is installed above the described square hole, described 4 T shape back-up blocks 22 and described arc back-up block 17 all cooperate with steel guide rail 23, adjust piece 16 and be connected with moving caliper 19, can adjust the tolerance clearance of 17 of steel guide rail 23 and T shape back-up block 22, arc back-up blocks by screw thread; The screw thread of screw 20 cooperates with leading screw 10, and two ends are hinged by cylinder and moving caliper 19; Moving caliper slide block 15 and moving caliper retracing spring 18 are installed in the bottom of moving caliper 19, between described moving caliper and the described moving caliper slide block rolling guide-rail pairs 21 is arranged, described rolling guide-rail pairs is made up of two base plates, middle retainer and needle roller, two base plates are separately fixed on moving caliper and the moving caliper slide block, friction of rolling between moving caliper and moving caliper slide block during operation;
Hydraulic part, comprise the upset HM Hydraulic Motor 34 of filter 25, motor 26, Variable plunger pump 27, by pass valve 28, electro connecting pressure gauge 29, the forward and reverse sequence valve 32 that clamps solenoid directional control valve 30, upset solenoid directional control valve 31, upset HM Hydraulic Motor, clamping hydraulic motor 33, drive hydraulic lock, what clamp clamped stops by electro connecting pressure gauge control;
Chain assemblies comprises that 4, two joints of two joints 47,48 and chain 47,48 are hinged with chain 4 respectively;
Control part comprises upset travel control device 400, safety switch 300, clamps travel control device 700;
Described clamping travel control device 700 comprises few tooth difference mechanism 35, cam 36 and two clamping travel switches 37,38, the propulsive effort that clamps travel switch is from leading screw 10,35 deceleration rear drive cam, the 36 forward and reverse rotations of few tooth difference mechanism, when the opening between described fixed clamp and the described moving caliper reaches predetermined maximum value or minimum value, cam 36 touches cooresponding clamping travel switch, stops the moving caliper action;
Described upset travel control device 400 is installed on the fixed clamp 11 by base 42, and axle 43 is installed on the base 42, the rotation bump the hammer 39 by bearing installation on axle 43, two upset travel switches 40,41 are installed on the base 42;
Described safety switch comprises pressing plate 46, safe travel switch 45 and bearing 44, pressing plate 46 is stuck on the roller of chain by deck, bearing 44 is stuck in and pressing plate 46 at interval on the chain roller of several joints by deck, safe travel switch 45 is installed on the bearing 44, and adjusts to chain safety travel switch 45 just pressings when stressed.
Advantage of the present utility model is: can finish rotary movement in lifting, can directly horizontal roll be translated into and perpendicular involve in the luggage car unloading operation, or directly will erect volume and translate into horizontal roll and carry out the loading-unloading vehicle operation, save productive costs, improve production efficiency; Have autonomous cruise speed system simultaneously, improved the convenience and the safety of operation.And the hydraulic overturn clamp is compared also with the electric turnover clamp and is had the following advantages: because plunger pump is a controllable capacity pump, thus under stressed little condition, can obtain under stressed big condition, can obtaining big application force at a high speed, and can automatically regulating.The output gross horsepower is little; Avoid motor rotation blockage and do not burnt motor; And HYDRAULIC CONTROL SYSTEM is more convenient.
Description of drawings
Integral structure scheme drawing when Fig. 1 keeps flat for the hydraulic overturn clamp.
Integral structure schematic side view when Fig. 2 keeps flat for the hydraulic overturn clamp.
Fig. 3 is the External view of the hydraulic efficiency pressure system of hydraulic overturn clamp.
Fig. 4 is the flip portion structural representation of hydraulic overturn clamp.
Fig. 5 is the flip portion structure schematic side view of hydraulic overturn clamp.
Fig. 6 is the clamp part-structure scheme drawing of hydraulic overturn clamp.
Fig. 7 is the clamp part-structure schematic side view of hydraulic overturn clamp.
Fig. 8 is the hydraulic part control system scheme drawing of hydraulic overturn clamp.
Fig. 9 is the clamping travel control system scheme drawing of hydraulic overturn clamp.
Figure 10 is the cutaway view of the clamping travel control system of hydraulic overturn clamp.
Figure 11 is the upset travel control system scheme drawing of hydraulic overturn clamp.
Figure 12 is the safety switch construction scheme drawing of hydraulic overturn clamp.
Figure 13 is the structural representation of the chain assemblies of hydraulic overturn clamp.
The specific embodiment
Clamp is overall, as shown in Figure 1, 2, 3:
The hydraulic overturn clamp is referring to Fig. 1, by horizontally rotate part 100, flip portion 200, clamp part 600 and by safety switch 300, upset travel control device 400, clamp travel control device 700 and form control part, be connected flip portion and clamp chain assemblies 500 partly, and hydraulic part 800 compositions.Fig. 2 is the lateral plan of clamp, and Fig. 3 is the External view of clamp hydraulic efficiency pressure system.
Flip portion, shown in Fig. 4,5:
Flip portion is made up of HM Hydraulic Motor and reductor 1, pinion shaft 2, sprocket wheel 3, chain 4, main shaft 5, big gear wheel 6 and turnover body 7.HM Hydraulic Motor and reductor 1 directly assemble with pinion shaft, by the bottom of bearing installation in turnover body 7, big gear wheel 6, two sprocket wheels 3 are installed on the main shaft 5, in the upper hole of turnover body 7, gear 2 and 6 is meshed main shaft by bearing installation, two chains 4 hang over sprocket wheel 3 above.Wherein chain is not osed top ring chain but open loop.Chain is striden behind the sprocket wheel respectively head and the tail with clamp and is connected and form two sections straight line chain A and B.The length of two straight line chain A and B can increase accordingly or shorten when HM Hydraulic Motor drives the chain rotation, and then changes its original orientation of bottom clamp, makes clamp be transformed into the aerial state of perpendicular volume, horizontal roll together with the coil of strip that is held.
The clamp part, shown in Fig. 6,7:
The clamp part is by Inlaid steel guide rail pair 12, the linear bearing guideway 21 of sound body slide block slide relative, the steel guide rail 23 of fixed clamp, the retracing spring 13 of fixed clamp slide block, the retracing spring 18 of moving caliper slide block, the adjustment piece 16 of fixed clamp 11, fixed clamp slide block 14, moving caliper 19, moving caliper slide block 15, driving clamping device 8 (HM Hydraulic Motor), coupler 9, leading screw 10, screw 20, moving caliper and fixed clamp slide relative, arc back-up block 17, T shape back-up block 22, chain joint 24 etc. are partly formed.The clamp part mainly is made up of fixed clamp assembly and moving caliper assembly.The fixed clamp assembly is divided into: HM Hydraulic Motor 8 is connected with leading screw 10 afterwards by bearing installation on fixed clamp 11 tops by coupler 9; Fixed clamp slide block 14 and retracing spring thereof also are installed in fixed clamp 11 bottoms; When fixed clamp 11 and 14 operations of fixed clamp slide block slip is arranged, be provided with steel guide rail pair 13 therebetween, guideway 12 is two micro-finishing cuboids, is installed in respectively on fixed clamp and the fixed clamp slide block, is marked with grease therebetween, is cliding friction during operation; The right side of fixed clamp 11 is beams of a square-section, and the top and bottom of beam are installed with steel guide rail 23.The moving caliper assembly is: a square hole on moving caliper 19 tops is sleeved on the right side rectangular beam of fixed clamp 11, the bottom of moving caliper square hole is installed with 4 T shape back-up blocks 22, arc back-up block 17 is installed above, cooperate with steel guide rail 23, adjust piece 16 and be connected with moving caliper 19, can adjust the tolerance clearance of steel guide rail 23 and back-up block 22 and 17 by screw thread; The screw thread of screw 20 cooperates with leading screw 10, and two ends are hinged by cylinder and moving caliper; The bottom that moving caliper slide block 15, moving caliper retracing spring 18 are installed moving caliper 19, a rolling guide-rail pairs is arranged between moving caliper 19 and the moving caliper slide block 15, rolling guide-rail pairs is made up of two base plates and middle retainer and needle roller, two base plates are separately fixed on moving caliper and the moving caliper slide block, moving caliper and moving caliper slider roll friction during operation.Fixed clamp assembly bottom is the pincers leg; The moving caliper bottom also is the pincers legs; Two pincers leg internal guide rail 12 and 21 V-shaped structures, the shape of deciding body slide block 14 and kinetoplast slide block 15 are up big and down small trapezoidal; Distance between moving caliper slide block and the fixed clamp slide block is called the opening degree of jaw in the industry.
The principle of work of clamp part is: clamp is placed on horizontal roll or the perpendicular volume, fixed clamp pincers leg inserts in the hole of coil of strip, moving caliper pincers leg is placed on the outside of coil of strip, till clamp touches the coil of strip end face, and transfers the crane hook deadweight of clamp all is pressed on the end face or cylindrical of coil of strip.Start the clamping hydraulic motor of clamp by control part, the clamping hydraulic motor drives leading screws 10 screws 20 by coupler 9 and makes that opening degree dwindles until clamping coil of strip between the moving caliper of clamp and the fixed caliper.Gripping power sharply increased after clamp clamped coil of strip, and the oil pressure of HM Hydraulic Motor also increases thereupon, when oil pressure greatly behind the rated value electro connecting pressure gauge send signal, the control system of clamp and hydraulic efficiency pressure system stop immediately to clamping motor 8 fuel feeding, clamping stops.When clamp is sling the especially perpendicular volume of coil of strip, motor gives the leading screw gripping power that screw is produced does not still enough make the coil of strip of clamp clamping not come off from clamp, at this moment the endoporus owing to coil of strip contacts with the moving caliper slide block with the fixed caliper slide block respectively with cylindrical, and the friction coefficient between coil of strip and slide block is much larger than the friction coefficient of Inlaid steel guide rail secondary 12 and rolling guide-rail pairs 21, so fixed clamp slide block, coil of strip, moving caliper slide block three parts fuse, and the V-way of forming along fixed clamp and moving caliper glides together, clamp is increased once more to the gripping power of coil of strip, guarantee that the perpendicular volume of clamp clamping can not come off.When clamp clamping coil of strip, HM Hydraulic Motor and leading screw do not have catch gear, by the self-locking maintenance gripping power of leading screw screw.
The hydraulic efficiency pressure system of clamp, as shown in Figure 8:
The upset HM Hydraulic Motor 34 that comprises filter 25, motor 26, Variable plunger pump 27, by pass valve 28, electro connecting pressure gauge 29, the forward and reverse sequence valve 32 that clamps solenoid directional control valve 30, upset solenoid directional control valve 31, upset HM Hydraulic Motor, clamping hydraulic motor 33, drive hydraulic lock.Upset HM Hydraulic Motor 34 is connected with upset solenoid directional control valve 31 by forward and reverse sequence valve 32; Clamping hydraulic motor 33 is connected with clamping solenoid directional control valve 30; Upset solenoid directional control valve 31 all is connected with Variable plunger pump 27 with clamping solenoid directional control valve 30, and Variable plunger pump 27 is connected with filter 25, motor 26; By pass valve 28 interconnects with electro connecting pressure gauge 29.The control of hydraulic efficiency pressure system as shown in Figure 8.
The action of hydraulic efficiency pressure system is: energising rear motor pump start high pressure oil is directly from the meta oil sump tank of solenoid directional control valve.Press " clamping " button of clamp control panel, control path makes the left side adhesive that clamps solenoid directional control valve, makes clamp clamp coil of strip thereby high pressure oil drives the clamping revolution.The gripping power of clamp increases rapidly after clamping coil of strip, and electro connecting pressure gauge contact high-voltage contact is sent out signal and made solenoid directional control valve return meta when oil pressure reaches setting value, clamps to stop immediately.Clamp solenoid directional control valve adhesive to the right when pressing the clamp open button, manually stop after putting in place.Finish the action of turning over perpendicular volume and turning over horizontal roll by the left and right adhesive clamp of " left-handed " or " dextrorotation " button of guidance panel upset solenoid directional control valve, knock over after putting in place and stop after changeing electrical trip switch.
The automatically controlled part of clamp partly is made up of push-button station, control box, clamp travel switch system, upset travel control system, safety switch and connecting cable etc.
Clamp travel control device, as Fig. 9, shown in Figure 10:
Form by a pair of few tooth difference mechanism 35, cam 36 and two clamping travel switches 37,38.The propulsive effort that clamps travel switch, bumps clamping travel switch system and stops by 36 rotations of few tooth difference mechanism deceleration rear drive cam from leading screw 10 when clamp reaches " maximum " or " minimum " opening degree.
The upset travel control device, as shown in figure 11:
The upset travel control device be installed on the clamp fixed clamp 11 by base 42, axle 43 is installed on the base 42, the rotation bump the hammer 39 by bearing installation on axle 43, two upset travel switches 40,41 are installed on the base 42.The upset travel switch rotates with clamp when clamp drives steel-coil overturning, does not rotate but bump the hammer by gravity, bumps to hammer into shape when clamp forwards " level " or " vertically " position to and knocks the Cheng Kaiguan clamp of changing one's profession over and stop.And, when clamp is laid down coil of strip,, be bevelled when promptly slinging the sky clamp because the center of gravity of clamp when clamping coil of strip and not clamping coil of strip changes, the upset travel control switch can provide signal till empty clamp is turned to level attitude automatically.
The safety switch of clamp, as shown in figure 12:
When clamp is sling coil of strip aloft such as mistake by clamp open button, clamp can aloft be opened again and can cause coil of strip to come off causing major accident.Safety switch is the right and wrong property design-calculated by chain, form by pressing plate 46, travel switch 45 and bearing 44, pressing plate 46 is stuck on the roller of chain by deck, bearing 44 by deck be stuck in 46 decks on the chain roller of several joints, travel switch 45 is installed on the bearing 44, and adjusts to not just pressing of switch 45 during force-bearing situation of chain.When clamp at the clamping coil of strip or when unloading coil of strip, what require that the weight of coil of strip must be whole is pressed on ground or the compartment, this moment, the chain state that must not stress was curve state, not pressing of safety switch travel switch; When slinging coil of strip, chain is stressed to be its straight state, pressing this moment travel switch, even the wrong aloft open button of pressing clamp, clamp does not have opening action yet.
Chain assemblies, as shown in figure 13:
Comprise that 4, two joints of two joints 47,48 and chain 47,48 are hinged with chain 4 respectively.
Claims (1)
1. the perpendicular aerial overturning clamp of horizontal roll of hydraulic pressure is characterized in that: comprise horizontally rotating part (100), flip portion (200), clamp part (600), hydraulic part (800), chain assemblies (500) and control part;
Flip portion, wherein overturning drive device (1) comprises upset HM Hydraulic Motor and upset reductor; Overturning drive device (1) interconnects assembling with pinion shaft (2), all is positioned at the bottom of turnover body (7); Pinion shaft (2) is connected with a joggle with big gear wheel (6); Main shaft (5) passes big gear wheel (6) middle part and is connected with big gear wheel (6), and main shaft (5) interconnects transmission with two groups of sprocket wheels (3); The chain (4) of an open loop of cross-over connection respectively on every group of sprocket wheel, the bottom of every chain is connected with the two ends of clamp part respectively; After big gear wheel (6), two groups of sprocket wheels (3) and rope delivery device are assemblied on the main shaft (5), again by the top of bearing installation in turnover body (7);
The clamp part comprises fixed clamp (11) and moving caliper (19); Have driving clamping device (8), described driving clamping device comprises the clamping hydraulic motor, and the clamping hydraulic motor is connected with leading screw (10) afterwards by bearing installation on fixed clamp (11) top by coupler (9); Fixed clamp slide block (14) and fixed clamp slide block retracing spring (13) are installed in fixed clamp (11) bottom; Slip is arranged when fixed clamp (11) and fixed clamp slide block (14) operation, be provided with steel guide rail pair (12) between fixed clamp (11) and the fixed clamp slide block (14), steel guide rail pair (12) is two micro-finishing cuboids, be installed in respectively on fixed clamp and the fixed clamp slide block, being marked with grease between described two micro-finishing cuboids, is cliding friction during operation; The right side of fixed clamp (11) is the beam of a square-section, and the top and bottom of beam are installed with steel guide rail (23); A square hole on moving caliper (19) top is sleeved on the beam on right side of fixed clamp (11), the bottom of described square hole is installed with 4 T shape back-up blocks (22), arc back-up block (17) is installed above the described square hole, described 4 T shape back-up blocks (22) and described arc back-up block (17) all cooperate with steel guide rail (23), adjust piece (16) and be connected with moving caliper (19), can adjust the tolerance clearance between steel guide rail (23) and T shape back-up block (22), arc back-up block (17) by screw thread; The screw thread of screw (20) cooperates with leading screw (10), and two ends are hinged by cylinder and moving caliper (19); Moving caliper slide block (15) and moving caliper retracing spring (18) are installed in the bottom of moving caliper (19), between described moving caliper and the described moving caliper slide block rolling guide-rail pairs (21) is arranged, described rolling guide-rail pairs is made up of two base plates, middle retainer and needle roller, two base plates are separately fixed on moving caliper and the moving caliper slide block, friction of rolling between moving caliper and moving caliper slide block during operation;
Hydraulic part, comprise the upset HM Hydraulic Motor (34) of filter (25), motor (26), Variable plunger pump (27), by pass valve (28), electro connecting pressure gauge (29), the forward and reverse sequence valve (32) that clamps solenoid directional control valve (30), upset solenoid directional control valve (31), upset HM Hydraulic Motor, clamping hydraulic motor (33), drive hydraulic lock, what clamp clamped stops by electro connecting pressure gauge control;
Chain assemblies comprises two joints (47), (48) and chain (4), and two joints (47), (48) are hinged with chain (4) respectively;
Control part comprises upset travel control device (400), safety switch (300), clamps travel control device (700);
Described clamping travel control device (700) comprises few tooth difference mechanism (35), cam (36) and two clamping travel switches (37), (38), the propulsive effort that clamps travel switch is from leading screw (10), few forward and reverse rotation of tooth difference mechanism (35) deceleration rear drive cam (36), when the opening between described fixed clamp and the described moving caliper reaches predetermined maximum value or minimum value, cam (36) touches cooresponding clamping travel switch, stops the moving caliper action;
Described upset travel control device (400) is installed on the fixed clamp (11) by base (42), axle (43) is installed on the base (42), the rotation bump hammer (39) by bearing installation on axle (43), two upset travel switches (40), (41) are installed on the base (42);
Described safety switch comprises pressing plate (46), safe travel switch (45) and bearing (44), pressing plate (46) is stuck on the roller of chain by deck, bearing (44) is stuck in and pressing plate (46) at interval on the chain roller of several joints by deck, safe travel switch (45) is installed on the bearing (44), and adjusts to chain just pressing of safety travel switch (45) when stressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206834818U CN201914839U (en) | 2010-12-28 | 2010-12-28 | Hydraulic vertical and horizontal coil overhead turnover clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206834818U CN201914839U (en) | 2010-12-28 | 2010-12-28 | Hydraulic vertical and horizontal coil overhead turnover clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201914839U true CN201914839U (en) | 2011-08-03 |
Family
ID=44414647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206834818U Expired - Lifetime CN201914839U (en) | 2010-12-28 | 2010-12-28 | Hydraulic vertical and horizontal coil overhead turnover clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201914839U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102085995A (en) * | 2010-12-28 | 2011-06-08 | 宋振才 | Hydraulic clamp capable of tilting vertical and horizontal rolls in air |
| CN103482545A (en) * | 2013-10-12 | 2014-01-01 | 中信重工机械股份有限公司 | Device for lifting large-sized cover plate magnetic pole composite member and lifting and overturning method |
-
2010
- 2010-12-28 CN CN2010206834818U patent/CN201914839U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102085995A (en) * | 2010-12-28 | 2011-06-08 | 宋振才 | Hydraulic clamp capable of tilting vertical and horizontal rolls in air |
| CN102085995B (en) * | 2010-12-28 | 2012-10-03 | 宋振才 | Hydraulic clamp capable of tilting vertical and horizontal rolls in air |
| CN103482545A (en) * | 2013-10-12 | 2014-01-01 | 中信重工机械股份有限公司 | Device for lifting large-sized cover plate magnetic pole composite member and lifting and overturning method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110803 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |