CN207113611U - A kind of compact cross beam type hydraulic steel pushing machine - Google Patents
A kind of compact cross beam type hydraulic steel pushing machine Download PDFInfo
- Publication number
- CN207113611U CN207113611U CN201720783279.4U CN201720783279U CN207113611U CN 207113611 U CN207113611 U CN 207113611U CN 201720783279 U CN201720783279 U CN 201720783279U CN 207113611 U CN207113611 U CN 207113611U
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- gear
- wheel
- crossbeam
- guide rail
- guide rod
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Abstract
The utility model provides a kind of compact cross beam type hydraulic steel pushing machine, including cuts somebody's hair, crossbeam, guide rail beam, fixing vehicle wheel group, mechanical synchronizer and hydraulic cylinder.Fixing vehicle wheel group is to be clamped to by double wheel rims, hook wheel on guide rail beam, it is moved along a straight line in track girder direction.Mechanical synchronizer includes rack guide rod, gear-box, shaft coupling, rack guide rod is held on centre position by upper pressure wheel, lower support wheel and left and right sides pinch roller in gear-box, rack guide rod is set to be limited by the gear between lower support wheel for linear motion, gear in casing relies on key and synchronous axis connection, synchronous shaft end in two casings is connected with shaft coupling, and two rack guide rods realize mechanical synchronization.The utility model device is compact-sized, and floor space is small, in light weight, does not change the mechanical property of existing pusher, simple in construction, is easy for installation and maintenance, more reliable and more stable, mechanical synchronization is realized, so as to improve production efficiency.
Description
Technical field
The utility model belongs to metallurgical mechanical equipment of steel rolling field, more particularly, to a kind of compact cross beam type hydraulic thrust steel
Machine.
Background technology
The level of production of steel is to weigh the horizontal important symbol of a modernization of the country.China's Iron ＆ Steel Development quickly,
Hot-strip and shaped steel occupy important ratio in iron and steel output always, are widely used in civilian, industrial, bridge, oil, build
Build, the field such as subway, show excellent mechanical property.With the rapid development of economy, product yield demand is growing day by day, production
Quality is more high-precision, requires higher to production equipment, but it is also essential to improve auxiliary device performance, therefore strengthens pushing away steel
The problem of structural stability of machine and synchronism are exactly to be solved.
The heating furnace used at present on Hot Line has two kinds of pushing type heating furnace and walking beam furnace.Push type heating
Stove is using relatively broad, because its is simple in construction, cost is cheap, easy to maintenance, extensively by client's favor and favorable comment.
Use more hydraulic steel pushing machine at present, be made up of the hydraulic cylinder device of two groups of independences, every group of device by cutting somebody's hair,
Crossbeam, lead, hydraulic cylinder and base composition.Two groups of hydraulic cylinder devices are promoted at the centre 2/3 of blank respectively, and hydraulic cylinder is lived
The action that the flexible realization of stopper rod is pushed ahead.Hydraulic steel pushing machine specific propulsion action implementation be：It is horizontal by Hydraulic Cylinder
Beam and cut somebody's hair, crossbeam is pushed forward to hydraulic cylinder piston rod maximum projecting position, puts down blank under the guide effect of lead
Row pushes away conveyor roller, along balladeur train, pushes heating furnace to, and blank in stove is moved forward a blank width, completes one
Stepwise operation.
Following problem be present in existing pusher：
(1) two group of independent hydraulically controlled cylinder pushing means can not realize synchronism, one group of hydraulic cylinder action easily occur soon, one group of liquid
The phenomenon of cylinder pressure slow motion.Because asynchronous, often promote once, advance will be twisted in stove once, wear stove inner slide
Aggravate, jam phenomenon easily occur.
(2) hydraulic cylinder travel is longer, and guide rod is elongate rod, and for bearing crossbeam and gravity of cutting somebody's hair, and blank pushes away side by side
When dynamic, it may appear that upward bulge phenomenon, make lead increase additional radial load, flexural deformation, hydraulic cylinder piston rod occur
Meeting flexural deformation, reduce the service life of hydraulic cylinder.
(3) hydraulic cylinder is during retraction, crossbeam and cuts somebody's hair heavier, and sliding bearing use in guide rod, long-term use of to grind
Damage is serious, countersunk head phenomenon occurs, hydraulic cylinder piston rod bending can also influence the service life of hydraulic cylinder.
(4) floor space is big, and weight of equipment is larger.
The content of the invention
In view of this, the utility model solve the problems, such as to be to provide it is a kind of it is compact-sized, floor space is small, weight is lighter,
The compact cross beam type hydraulic steel pushing machine of mechanical property that is more reliable and more stable and not changing existing pusher.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of compact cross beam type hydraulic steel pushing machine, including conveyor roller, crossbeam, guide rail beam, fixing vehicle wheel group, machinery are same
Step device and hydraulic cylinder, the hydraulic cylinder connecting cross beam simultaneously drive crossbeam to be moved above conveyor roller, the roller of conveyor roller two
Between be provided with guide rail beam, piston rod telescopic direction of the guide rail beam along hydraulic cylinder is set, and fixing vehicle wheel group is fixed on the two of crossbeam
Side bottom, under the driving of hydraulic cylinder, crossbeam is moved by fixing vehicle wheel group on guide rail beam,
Mechanical synchronizer includes rack guide rod, gear-box and shaft coupling, and rack guide rod through in gear-box, lead by rack
Crossbeam is fixed in one end of bar, the gear engagement in the rack and pinion case of rack guide rod bottom, the moving belt carry-over bar of crossbeam
The movement of guide rod.Limited by mechanical synchronizer, make the parallel promotion of crossbeam.
Further, the mechanical synchronizer is provided with two groups, is symmetrically connected to crossbeam both ends, the gears of two gear-boxes it
Between by the way that in key connection to synchronizing shaft, shaft coupling is connected between synchronizing shaft.
Further, guide rail beam and the fixing vehicle wheel group is equipped with two, and two fixing vehicle wheel groups are individually fixed in crossbeam
Two side bottoms.
Further, the front end of the crossbeam is connected with several and cut somebody's hair.
Further, the fixing vehicle wheel group includes bearing, double wheel rims and hook wheel, and bearing is fixed on crossbeam lower end, branch
Seat is provided with race, and double wheel rims are installed in race by wheel shaft, and hook wheel is installed on bearing lower end, two-wheel by hook wheel shaft
Edge wheel and hook wheel are clamped in guide rail beam upper and lower ends respectively, make fixing vehicle wheel group for linear motion along guide rail beam.
Further, the guide rail beam lower end is fixed with track base, and beside track base, guide rail beam upper end is fixed with hook wheel
Guide rail, double wheel rims roll on guide rail.
Further, gear, support roller, pinch roller and lateral pressure wheel are provided with the gear-box, pass through key between gear and synchronizing shaft
Connection, pinch roller is arranged in parallel in gear above, and support roller is provided with two, is respectively arranged on the both sides of gear, rack guide rod gear with
Walked between pinch roller, the rack and pinion of rack guide rod is meshed, and two support rollers are arranged in the lower end of rack guide rod, and lateral pressure wheel is provided with
Two, the both sides of rack guide rod are squeezed in respectively, and the both sides of gear-box are respectively provided with square hole, and lateral pressure wheel is led through square hole extruding rack
Bar.
Further, described to cut somebody's hair including seat and the pushing block of cutting somebody's hair, seat of cutting somebody's hair is fixed on crossbeam front end, and pushing block is fixed by bearing pin
Cutting somebody's hair on seat.
Further, the hydraulic cylinder is provided with two side by side, and two hydraulic cylinders are located between two gear-boxes.
Further, the encoder of control hydraulic cylinder travel is installed on the outside of the gear-box, encoder connection synchronizing shaft
One end.
Relative to prior art, a kind of compact cross beam type hydraulic steel pushing machine described in the utility model has following excellent
Gesture：(1) a kind of greater compactness of structure is obtained, floor space is small, in light weight, more reliable and more stable, and does not change existing pusher
Mechanical property；
(2) cut somebody's hair, crossbeam, the weight of rack guide rod are concentrated mainly in wheel group, countersunk head phenomenon will not be produced；
(3) mechanical synchronizer is used, saves linear displacement transducer, proportional reversing valve and electro-hydraulic reversing valve control, section
Material saving and the cost of control.
(4) structure of movable connection of cutting somebody's hair, stability under loading can be met, when hydraulic cylinder reclaims, unrelated debris, can also be played
Heat-insulated effect.
Brief description of the drawings
Form a part of accompanying drawing of the present utility model to be used for providing further understanding to of the present utility model, this practicality is new
The schematic description and description of type is used to explain the utility model, does not form to improper restriction of the present utility model.
In accompanying drawing：
Fig. 1 is overlooking the structure diagram of the present utility model；
Fig. 2 is main structure diagram of the present utility model；
Fig. 3 is the enlarged diagram of fixing vehicle wheel group in Fig. 2；
Fig. 4 is Fig. 3 left sectional view；
Fig. 5 is A-A faces sectional view in Fig. 2；
Fig. 6 is the structural representation cut somebody's hair in Fig. 2；
Fig. 7 is B-B faces sectional view in Fig. 2；
Fig. 8 is the enlarged diagram of part A in Fig. 7；
Fig. 9 is the top view of lateral pressure wheel in Fig. 7；
Description of reference numerals：
1- conveyor rollers；2- blanks；3- cuts somebody's hair；4- crossbeams；7- hydraulic cylinders；9- welded plates；10- rack guide rods；11- shaft couplings
Device；12- gear-boxes；13- encoders；14- guide rail beams；15- fixing vehicle wheel groups；16- bearings；17- double wheel rims；18- bearings；
19- nuts；20- wheel shafts；21- spacers；22- end caps；23- guide rails；24- hook wheels；25- hook wheel shafts；26- sliding bearings；27- guide rails
Seat；28- pinch rollers；29- lateral pressure wheels；30- racks；31- gears；32- keys；33- synchronizing shafts；34- support rollers；35- cuts somebody's hair seat；36- is kept off
Plate；37- bearing pins；38- pushing blocks；39- pinch roller seats；40- lubricating cups；41- glands；42- bolts；43- spacer rings；44- ball bearings；45- sides
Pinch roller roller；46- fixing axles；47- holes back-up ring.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than instruction
Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For to limitation of the present utility model.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction
Or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In description of the present utility model, unless separately
It is described, " multiple " are meant that two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the utility model.
Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Fig. 1~9, a kind of compact cross beam type hydraulic steel pushing machine, including conveyor roller 1, crossbeam 4, guide rail beam 14,
Fixing vehicle wheel group 15, mechanical synchronizer and hydraulic cylinder 7, the connecting cross beam 4 of hydraulic cylinder 7 simultaneously drive crossbeam 4 in conveyor roller 1
Top is moved, and the gap location in conveyor roller 1 is provided with guide rail beam 14, piston rod telescopic direction of the guide rail beam 14 along hydraulic cylinder 7
Set, fixing vehicle wheel group 15 is fixed on the lower end of crossbeam 4, and under the driving of hydraulic cylinder 7, crossbeam 4 is existed by fixing vehicle wheel group 15
Moved on guide rail beam 14；
Mechanical synchronizer includes rack guide rod 10 and gear-box 12, and rack guide rod 10 is through in gear-box 12, rack
Crossbeam 4 is fixed in one end of guide rod 10, and the rack 30 of rack guide rod 10 engages with the gear 31 in gear-box 12, the shifting of crossbeam 4
The dynamic movement with carry-over bar guide rod 10.Rack guide rod 10 passes through trip bolt stationary rack 30.
The mechanical synchronizer is provided with two groups, is symmetrically connected to the both ends of crossbeam 4, between the gear 31 of two gear-boxes 12
It is connected to by key 32 on synchronizing shaft 33, shaft coupling 11 is connected between synchronizing shaft 33.
Rack guide rod 10 is held on centre position by upper pressure wheel 28, lower support wheel 34 and left and right sides pinch roller 29 in gear-box 12
It is motionless, rack guide rod 10 is limited by the gear 31 between lower support wheel 34, synchronizing shaft 32 and encoder 13 for linear motion,
Synchronizing shaft 33 in two gear-boxes 12 connects by shaft coupling 11, drives two rack guide rods 10 to realize mechanical synchronization.
The guide rail beam 14 and fixing vehicle wheel group 15 are equipped with two, and two fixing vehicle wheel groups 15 are individually fixed in crossbeam 4
Both ends bottom.
The front end of the crossbeam 4 is connected with several and cuts somebody's hair 3.
The fixing vehicle wheel group 15 includes bearing 16, double wheel rims 17 and hook wheel 24, and bearing 16 is fixed under crossbeam 4
End, bearing 16 are provided with race, and double wheel rims 17 are installed in race by wheel shaft 20, and hook wheel 24 is installed by hook wheel shaft 25
In the lower end of bearing 16, double wheel rims 17 and hook wheel 24 are clamped in the upper and lower ends of guide rail beam 14 respectively, make fixing vehicle wheel group 15
It can be moved along a straight line along on guide rail beam 14.
Bearing 18 is connected between the inside of double wheel rims 17 and wheel shaft 20, and end is fixed with the outside of double wheel rims 17
Lid 22 and spacer 21, wheel shaft 20 are fastened on bearing through bearing 16, and by nut 19.The inside of hook wheel 24 and hook wheel shaft 25
Between be connected with sliding bearing 26.
The lower end of guide rail beam 14 is fixed with track base 27, and hook wheel 24 located at the side of track base 27, consolidate by the upper end of guide rail beam 14
Surely there is guide rail 23, double wheel rims 17 roll on guide rail 23.
Gear 31, support roller 34, pinch roller 28 and lateral pressure wheel 29 are provided with the gear-box 12, between gear 31 and synchronizing shaft 33
Connected by key 32, pinch roller 28 is provided with two located at the top of gear 31, support roller 34, is respectively arranged on the both sides of gear 31, and rack is led
Bar 10 is walked between gear 31 and pinch roller 28, and the rack 30 of rack guide rod 10 is meshed with gear 31, and two support rollers 34 are squeezed in
The lower end of rack guide rod 10, lateral pressure wheel 29 are provided with two, are squeezed in the both sides of rack guide rod 10 respectively, and the both sides of gear-box 12 are each
Square hole is provided with, lateral pressure wheel 29 extrudes the both sides of rack guide rod 10 through square hole.
Lateral pressure wheel 29 includes pinch roller seat 39, lubricating cup 40, gland 41, ball bearing 44, lateral pressure wheel roller 45 and fixing axle 46, pinch roller
Seat 39 is weldingly fixed on the both sides up and down in hole, and gland 41 is fixed on pinch roller seat 39, gland 41 and pinch roller seat by bolt-through
39 lock the upper and lower ends of fixing axle 46, and the middle thicker part point of fixing axle 46 connects lateral pressure wheel roller by ball bearing 44, Gu
The upper and lower ends narrower portion of dead axle 46 is both secured to pinch roller seat 39.Space between lateral pressure wheel roller 45 and fixing axle 46 is provided with oil
The oil-out of cup 40.Spacer ring 43 is provided between ball bearing 44 and gland 41, hole is provided between ball bearing 44 and lateral pressure wheel roller 45 and is kept off
Circle 47.
Described to cut somebody's hair 3 including cut somebody's hair seat 35 and pushing block 38, seat 35 of cutting somebody's hair is fixed on the front end of crossbeam 4, and the upper end of pushing block 38 leads to
Cross bearing pin 37 and be fixed on and cut somebody's hair on seat 35, the lower end movable contact of pushing block 38.When crossbeam homing, 3 advanced if cut somebody's hair
During be obstructed, pushing block 38 can rotate towards back to the direction of crossbeam 4, prevent that midway is stuck, avoid the midway of crossbeam 4 out of service
Or 3 damages of cutting somebody's hair.The position on seat 35 positioned at the upper end of bearing pin 37 of cutting somebody's hair is fixed with baffle plate 36, for bearing pin 37 is shared, keeping off
Plate lower surface is provided with the arcwall face to be matched with bearing pin 37.
The hydraulic cylinder 7 is provided with two side by side, and two hydraulic cylinders 7 are located between two gear-boxes 12.
The outside of gear-box 12 is provided with the encoder 13 of the stroke of control hydraulic cylinder 7, encoder connection synchronizing shaft 33
One end.
Gear-box 12 includes upper, middle and lower three parts, upper middle two parts and in lower two parts be welded with welded plate 9, up and down
Two welded plates 9 are fixed by screw, are easy to dismount rack guide rod 10.
The implementation of specific propulsion action is：Crossbeam 4 is promoted by hydraulic cylinder 7 and several on crossbeam 4 cut somebody's hair 3, crossbeam 4
It is parallel to be pushed forward to the piston rod of hydraulic cylinder 7 most under the guide effect of fixing vehicle wheel group 15, rack guide rod 10 and gear-box 12
Big extended position, make blank 2 is parallel to push away conveyor roller 1, push heating furnace to, and make one blank of blank forward movement in stove wide
Degree, complete a stepwise operation.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in
Protection domain within.
Claims (10)
- A kind of 1. compact cross beam type hydraulic steel pushing machine, it is characterised in that：Including conveyor roller (1), crossbeam (4), guide rail beam (14), fixing vehicle wheel group (15), mechanical synchronizer and hydraulic cylinder (7), hydraulic cylinder (7) connecting cross beam (4) simultaneously drive horizontal stroke Beam (4) is mobile above conveyor roller (1), and two roller middles are provided with guide rail beam (14), guide rail beam in conveyor roller (1) (14) set along the piston rod telescopic direction of hydraulic cylinder (7), fixing vehicle wheel group (15) is fixed on the lower end of crossbeam (4), in liquid Under the driving of cylinder pressure (7), crossbeam (4) is moved by fixing vehicle wheel group (15) on guide rail beam (14)；Mechanical synchronizer includes rack guide rod (10) and gear-box (12), rack guide rod (10) through in gear-box (12), One end of rack guide rod (10) is fixed on crossbeam (4), in the rack (30) and gear-box (12) of rack guide rod (10) bottom Gear (31) engages, and the movement of the moving belt carry-over bar guide rod (10) of crossbeam (4), is limited by mechanical synchronizer, makes crossbeam (4) parallel promotion.
- A kind of 2. compact cross beam type hydraulic steel pushing machine according to claim 1, it is characterised in that：The mechanical synchronization dress Two groups have been installed, crossbeam (4) both ends has symmetrically been connected to, is connected between the gear (31) of two gear-boxes (12) by key (32) On synchronizing shaft (33), shaft coupling (11) is connected between synchronizing shaft (33).
- A kind of 3. compact cross beam type hydraulic steel pushing machine according to claim 1, it is characterised in that：The guide rail beam (14) Two are equipped with fixing vehicle wheel group (15), two fixing vehicle wheel groups (15) are individually fixed in the bottom at crossbeam (4) both ends.
- A kind of 4. compact cross beam type hydraulic steel pushing machine according to claim 1, it is characterised in that：The crossbeam (4) Front end is connected with several and cut somebody's hair (3).
- A kind of 5. compact cross beam type hydraulic steel pushing machine according to claim 1, it is characterised in that：The fixing vehicle wheel group (15) bearing (16), double wheel rims (17) and hook wheel (24) are included, bearing (16) is fixed on crossbeam (4) lower end, bearing (16) Race is provided with, double wheel rims (17) are installed in race by wheel shaft (20), and hook wheel (24) is installed by hook wheel shaft (25) In bearing (16) lower end, double wheel rims (17) and hook wheel (24) are clamped in guide rail beam (14) upper and lower ends respectively, make to fix car Wheel group (15) can only move along a straight line along on guide rail beam (14).
- A kind of 6. compact cross beam type hydraulic steel pushing machine according to claim 5, it is characterised in that：The guide rail beam (14) Lower end is fixed with track base (27), and for hook wheel (24) beside track base (27), guide rail beam (14) upper end is fixed with guide rail (23), Double wheel rims (17) roll on guide rail (23).
- A kind of 7. compact cross beam type hydraulic steel pushing machine according to claim 1, it is characterised in that：The gear-box (12) It is interior to be provided with gear (31), support roller (34), pinch roller (28) and lateral pressure wheel (29), pass through key between gear (31) and synchronizing shaft (33) (32) connect, for pinch roller (28) above gear (31), support roller (34) is provided with two, is respectively arranged on the both sides of gear (31), tooth Bar guide rod (10) is walked between gear (31) and pinch roller (28), and rack (30) and the gear (31) of rack guide rod (10) are mutually nibbled Close, two support rollers (34) are arranged in the lower end of rack guide rod (10), and lateral pressure wheel (29) is provided with two, is squeezed in rack guide rod respectively (10) two side bottoms, the both sides of gear-box (12) are respectively provided with square hole, and lateral pressure wheel (29) extrudes rack guide rod (10) through square hole.
- A kind of 8. compact cross beam type hydraulic steel pushing machine according to claim 4, it is characterised in that：Described (3) bag of cutting somebody's hair Seat of cutting somebody's hair (35) and pushing block (38) are included, seat of cutting somebody's hair (35) is fixed on crossbeam (4) front end, and pushing block (38) is fixed on by bearing pin (37) Cut somebody's hair on seat (35).
- A kind of 9. compact cross beam type hydraulic steel pushing machine according to claim 1, it is characterised in that：The hydraulic cylinder (7) Two are provided with side by side, and two hydraulic cylinders (7) are located between two gear-boxes (12).
- A kind of 10. compact cross beam type hydraulic steel pushing machine according to claim 2, it is characterised in that：The gear-box (12) outside is provided with the encoder (13) of control hydraulic cylinder (7) stroke, and encoder is connected to one end of synchronizing shaft (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720783279.4U CN207113611U (en) | 2017-06-30 | 2017-06-30 | A kind of compact cross beam type hydraulic steel pushing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720783279.4U CN207113611U (en) | 2017-06-30 | 2017-06-30 | A kind of compact cross beam type hydraulic steel pushing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207113611U true CN207113611U (en) | 2018-03-16 |
Family
ID=61587435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720783279.4U Active CN207113611U (en) | 2017-06-30 | 2017-06-30 | A kind of compact cross beam type hydraulic steel pushing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207113611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289785A (en) * | 2017-06-30 | 2017-10-24 | 天津市中重科技工程有限公司 | A kind of compact cross beam type hydraulic steel pushing machine |
-
2017
- 2017-06-30 CN CN201720783279.4U patent/CN207113611U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289785A (en) * | 2017-06-30 | 2017-10-24 | 天津市中重科技工程有限公司 | A kind of compact cross beam type hydraulic steel pushing machine |
| CN107289785B (en) * | 2017-06-30 | 2023-10-13 | 中重科技(天津)股份有限公司 | Compact crossbeam formula hydraulic pusher |
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| CP01 | Change in the name or title of a patent holder |
Address after: No.16, Jingxiang Road, Science Park, Beichen District, Tianjin, 300409 Patentee after: Zhongzhong Technology (Tianjin) Co.,Ltd. Address before: No.16, Jingxiang Road, Science Park, Beichen District, Tianjin, 300409 Patentee before: TIANJIN ZHONGZHONG SCIENCE TECHNOLOGY & ENGINEERING Co.,Ltd. |
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