CN110158422A - A kind of road asphalt paves head and its installation apparatus - Google Patents
A kind of road asphalt paves head and its installation apparatus Download PDFInfo
- Publication number
- CN110158422A CN110158422A CN201910567812.7A CN201910567812A CN110158422A CN 110158422 A CN110158422 A CN 110158422A CN 201910567812 A CN201910567812 A CN 201910567812A CN 110158422 A CN110158422 A CN 110158422A
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- CN
- China
- Prior art keywords
- fixedly installed
- base plate
- driving
- bottom plate
- gear
- Prior art date
- 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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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/45—Portable apparatus for preparing, or for preparing and applying to the road, compound liquid binders, e.g. emulsified bitumen, fluxed asphalt
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4833—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with tamping or vibrating means for consolidating or finishing, e.g. immersed vibrators, with or without non-vibratory or non-percussive pressing or smoothing means
- E01C19/4853—Apparatus designed for railless operation, e.g. crawler-mounted, provided with portable trackway arrangements
- E01C19/486—Apparatus designed for railless operation, e.g. crawler-mounted, provided with portable trackway arrangements with non-vibratory or non-percussive pressing or smoothing means; with supplemental elements penetrating the paving to work the material thereof
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
It paves head and its installation apparatus the invention discloses a kind of road asphalt, including dual-axle motor, the first transmission shaft is fixedly installed on the dual-axle motor, activity has been engaged three groups of adjustment gears in the driving chain, the outside screw of the threaded rod is provided with outer nut, push rod is fixedly installed on the outer nut, the push rod respectively with base plate one, base plate two and base plate three abut against, extension rod is fixedly installed on the base plate one, compression roll is movably set in the shaft, screed is fixedly installed on the base plate two, rake teeth is fixedly installed on the base plate three.It paves head the present invention provides road asphalt, with three kinds of rake teeth, screed and the compression roll structures that pave that can independently adjust height, the stirring structure of anti-compaction is additionally provided in hopper, effectively improve paving effect, the invention also discloses paved the installation apparatus of head based on road asphalt, it is easy to use, highly promote.
Description
Technical field
The present invention relates to road spreading engineering device technique field, specially a kind of road asphalt paves head and its installation apparatus.
Background technique
In the prior art, application No. is a kind of construction asphalt paving devices of " 201811316792.8 ", including
Bottom plate is fixed, has been bolted control cabinet in the top exterior walls of the fixed bottom plate, and is led on the side inner wall of control cabinet
It crosses bolt and is fixed with processor, be bolted in the top exterior walls of the fixed bottom plate there are four the first hydraulic cylinder, and
It has been bolted mounting plate at the top of first hydraulic cylinder, has been provided with heat release hole at the top of the mounting plate, the construction
The inner wall for scraping body feed tank ontology can be stirred to the intrinsic raw material of body feed tank with asphalt paving device, prevents raw material knot
It block and is bonded on the inner wall of body feed tank ontology, the height of mounting plate can be adjusted according to different requirements, to adjust three feet
The height of frame and rake teeth preferably paves to pitch, can collect extra pitch and be reused, avoid wave
Take, paving effect can be improved according to the pouring weight that different weight is placed in different requirements to be compacted to pitch.
But in use, however it remains more apparent defect: 1, above-mentioned apparatus is only realized by rake teeth
Pitch paves, and lacks the device that pitch is pressed and is compacted in time, influences the flatness of pitch, and effect is limited；2, on
State device and the stone in body feed tank be stirred using independent motor, using the first hydraulic cylinder and the second hydraulic cylinder come
Realize that the power device needed is more, and not only structure is complicated to the asphalt paving of different-thickness, and will increase assembly cost and
Use cost.
Summary of the invention
It paves head and its installation apparatus the purpose of the present invention is to provide a kind of road asphalt, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the invention provides the following technical scheme:
A kind of road asphalt paves head, including dual-axle motor, and the first transmission shaft, institute are fixedly installed on the dual-axle motor
It states the first transmission shaft to be fixed at the center of the first driving gear, the first driving gear activity is engaged in driving chain
In, activity has been engaged the first driven gear, the transmission chain in the one end of the driving chain far from the first driving gear
Activity has been engaged three groups of adjustment gears in item, and the adjustment gear is arranged at the first driving gear and the first driven gear
Between, slide bar is fixedly installed at the center of the adjustment gear, the slide bar is movably arranged on the cunning in threaded rod inner cavity
Between rail, the outside screw of the threaded rod is provided with outer nut, and push rod, the push rod point are fixedly installed on the outer nut
It is not abutted against with base plate one, base plate two and base plate three, extension rod, the extension is fixedly installed on the base plate one
It is fixedly installed shaft on bar, compression roll is movably set in the shaft, is fixedly installed screed on the base plate two,
Rake teeth is fixedly installed on the base plate three.
Preferably, it is fixedly installed column at the center of first driven gear, the column is far from the first passive tooth
One end of wheel is movably arranged in bearing base.
Preferably, the threaded rod is movably arranged in annulus bearing, and the annulus bearing is fixed at transverse slat and opens up
Mounting groove in, the two sides of the transverse slat are symmetrically fixedly installed support column.
A kind of installation apparatus, including car bottom plate further include that road asphalt paves head, the car bottom plate and base plate one, bottom
It is separately connected between seat board two, base plate three and is provided with connecting spring, cockpit, the twin shaft electricity are provided on the car bottom plate
Second driving shaft is fixedly installed on machine, the second driving shaft runs through the side wall of car bottom plate, fixes on the second driving shaft
It is provided with the second driving gear, the second driving gear activity is engaged in stirring chain, living in the stirring chain
It is dynamic to be engaged the second driven gear, auger bar, the spiral shell are fixedly installed at the center of second driven gear
It revolves stirring rod to be arranged in hopper, is respectively arranged with feed inlet and discharge nozzle on the hopper.
Preferably, the dual-axle motor is fixed in the inner cavity of car bottom plate, and the bearing base is fixed at vehicle
In the inner cavity of bottom plate, the support column is fixed in the inner cavity of car bottom plate.
Preferably, the two sides of the car bottom plate are symmetrically arranged with connector, and rolling is fixedly installed on the connector
Axis is provided with pinch roller on the roller bearing.
Compared with prior art, the beneficial effects of the present invention are:
1, these three lying devices of rake teeth, screed and compression roll are respectively arranged in the present apparatus, it can be successively by pitch
Stone is broken up, is uniformly laid with and is compacted, and a series of processing operations can be continuously finished, so that the more smooth consolidation of stone, effectively
Improve paving effect；
2, the height of rake teeth, screed and compression roll apart from ground stone can be adjusted freely in the present apparatus, Neng Gouman
The process requirements of sufficient different places, different-thickness stone, the scope of application are wider；
3, it is provided in the present apparatus and the device broken up is stirred to the stone in hopper, stone plate can be effectively prevented
Knot, improves the uniformity of stone；
4, the height of rake teeth, screed and compression roll is adjusted and stirred to stone in the present apparatus is all by the same electricity
What machine drove, electric structure is more simplified, and the assembly cost and use cost of device, energy-saving and emission-reduction are effectively reduced.
It paves head the present invention provides road asphalt, there is the rake teeth, screed and compression roll three that can independently adjust height
The structure that paves is planted, the stirring structure of anti-compaction is additionally provided in hopper, effectively improves paving effect, the invention also discloses bases
It paves the installation apparatus of head in road asphalt, it is easy to use, highly promote.
Detailed description of the invention
Fig. 1 is that road asphalt of the invention paves header structure schematic diagram；
Fig. 2 is enlarged drawing at the A in Fig. 1 of the invention；
Fig. 3 is that road asphalt of the invention paves the structural schematic diagram of head and its installation apparatus.
In figure: 1 dual-axle motor, 2 first transmission shafts, 3 first driving gears, 4 driving chains, 5 first driven gears, 6 are stood
Column, 7 bearing bases, 8 adjustment gears, 9 slide bars, 10 threaded rods, 11 sliding rails, 12 outer nuts, 13 push rods, 14 base plates one, 15 bottoms
Seat board two, 16 base plates three, 17 extension rods, 18 shafts, 19 compression rolls, 20 screeds, 21 rake teeths, 22 annulus bearings, 23 transverse slats,
24 support columns, 25 car bottom plates, 251 connecting springs, 26 cockpits, 27 second driving shafts, 28 second driving gears, 29 stirring chains
Item, 30 second driven gears, 31 auger bars, 32 hoppers, 33 feed inlets, 34 discharge nozzles, 35 connectors, 36 roller bearings, 37 pressures
Wheel.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-3 is please referred to, the present invention provides a kind of technical solution:
A kind of road asphalt paves head, including dual-axle motor 1, and the limited public affairs of Dongguan City Qin Yi motor can be used in dual-axle motor 1
The TS-40GZ595 model provided is provided, is fixedly installed the first transmission shaft 2 on dual-axle motor 1, the first transmission shaft 2 is fixed on first
At the center of driving gear 3,3 activity of the first driving gear is engaged in driving chain 4, and driving chain 4 is main far from first
Activity has been engaged the first driven gear 5 in one end of moving gear 3, when the rotation of the first driving gear 3, can pass through transmission chain
Item 4 drives the rotation of the first driven gear 5, and the main function of the first driven gear 5 is that driving chain 4 is strutted sizing, transmission chain
Activity has been engaged three groups of adjustment gears 8 in item 4, and adjustment gear 8 is arranged at the first driving gear 3 and the first driven gear
Between 5, adjustment gear 8 can be rotated with the operating of driving chain 4, be fixedly installed slide bar at the center of adjustment gear 8
9, slide bar 9 is movably arranged between the sliding rail 11 in 10 inner cavity of threaded rod, and slide bar 9 can be moved along sliding rail 11, threaded rod 10
Outside screw is provided with outer nut 12, and when 10 rotation of threaded rod, outer nut 12 can be moved along threaded rod 10, on outer nut 12
It is fixedly installed push rod 13, push rod 13 is abutted against with base plate 1, base plate 2 15 and base plate 3 16 respectively, base plate one
It is fixedly installed extension rod 17 on 14, shaft 18 is fixedly installed on extension rod 17, compression roll 19 is movably set in shaft 18,
It is fixedly installed screed 20 on base plate 2 15, rake teeth 21 is fixedly installed on base plate 3 16, rake teeth 21 is used to stone
It separately smashes, prevents hardened, screed 20 is used to push open stone, keeps uniformly, last compression roll 19 is then used to stone
It compresses.
Preferably as one, column 6 is fixedly installed at the center of the first driven gear 5, column 6 is far from the first passive tooth
One end of wheel 5 is movably arranged in bearing base 7, and column 6 can rotate in bearing base 7, mainly rise to the first driven gear 5
The effect of movable supporting is arrived.
Preferably as one, threaded rod 10 is movably arranged in annulus bearing 22, and annulus bearing 22 is fixed at transverse slat
In 23 mounting grooves opened up, the two sides of transverse slat 23 are symmetrically fixedly installed support column 24, and threaded rod 10 can be in annulus bearing 22
Rotation, but cannot occur to slide up and down.
A kind of installation apparatus, including car bottom plate 25 further include that road asphalt paves head, car bottom plate 25 and base plate 1,
It is separately connected between base plate 2 15, base plate 3 16 and is provided with connecting spring 251, cockpit 26 is provided on car bottom plate 25,
Operator, which can be sitting in cockpit 26, controls the device, and second driving shaft 27, the second transmission are fixedly installed on dual-axle motor 1
Axis 27 runs through the side wall of car bottom plate 25, is fixedly installed the second driving gear 28, the second driving gear 28 on second driving shaft 27
Activity is engaged in stirring chain 29, and activity in chain 29 of stirring has been engaged the second driven gear 30, and second is passive
Auger bar 31 is fixedly installed at the center of gear 30, auger bar 31 is arranged in hopper 32, auger bar 31,
The stone in hopper 32 can be stirred when rotation, prevent stone hardened, feed inlet 33 is respectively arranged on hopper 32 and gone out
Expects pipe 34, stone can be added from feed inlet 33, be flowed out on the ground for needing to be laid with finally by discharge nozzle 34.
Preferably as one, dual-axle motor 1 is fixed in the inner cavity of car bottom plate 25, and bearing base 7 is fixed at
In the inner cavity of car bottom plate 25, support column 24 is fixed in the inner cavity of car bottom plate 25.
Preferably as one, the two sides of car bottom plate 25 are symmetrically arranged with connector 35, and rolling is fixedly installed on connector 35
Axis 36 is provided with pinch roller 37 on roller bearing 36, and pinch roller 37 compress again to the stone after laying and be operated, and promotes paving
If effect.
Working principle: when in use, operator can be sitting in cockpit 26 and manipulate, can by feed inlet 33 to
Stone is added in hopper 32, at this point, dual-axle motor 1 is constantly in operating condition, dual-axle motor 1 is driven by second driving shaft 27
The rotation of second driving gear 28, the second driving gear 28 drive the rotation of the second driven gear 30, the second quilt by stirring chain 29
Moving gear 30 finally drives auger bar 31 to be stirred the stone in hopper 32 and breaks up, and prevents hardened, to be stirred paving
Material is flowed out from discharge nozzle 34, is laid with to ground.
Under different use environments, it is adjusted if necessary to the thickness to asphalt paving with height, it can be right respectively
The position of rake teeth 21, screed 20 and compression roll 19 is adjusted, specifically, rake teeth 21, screed 20 and compression roll 19 is right
The adjustment gear 8 at position is answered to move up along sliding rail 11, so that 8 activity of adjustment gear is engaged in driving chain 4,
At this point, dual-axle motor 1 drives the first driving gear 3 by the first transmission shaft 2 since dual-axle motor 1 is constantly in operating condition,
Therefore driving chain 4 is also to be constantly in operating condition, therefore driving chain 4 will drive the rotation of adjustment gear 8, due to slide bar
9 can only slide up and down along sliding rail 11 and cannot rotate left and right, therefore the adjustment gear 8 rotated can drive screw thread by slide bar 9
Bar 10 rotates with, so that outer nut 12 gradually slides along threaded rod 10, outer nut 12 pushes base plate one by push rod 13
14, base plate 2 15 or base plate 3 16, and then compression roll 19, screed 20 and the independent progress position tune of rake teeth 21 are pushed respectively
It is whole, after the adjustment of position, adjustment gear 8 can be pushed down on along sliding rail 11, at this time compression roll 19, screed 20 and rake teeth
21 height just no longer changes.
In use, rake teeth 21 is used to separate stone and smash, prevent hardened, screed 20 is used to push open stone, keeps
Uniformly, last compression roll 19 is then used to compress stone, and the pinch roller 37 of car body two sides can carry out again the stone after compacting
Primary presses, and effectively improves laying effect.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
- The head 1. a kind of road asphalt paves, including dual-axle motor (1), it is characterised in that: be fixedly installed on the dual-axle motor (1) Have the first transmission shaft (2), first transmission shaft (2) is fixed at the center of the first driving gear (3), first driving tooth Wheel (3) activity is engaged in driving chain (4), and the driving chain (4) is far from living in the one end of the first driving gear (3) Dynamic to be engaged the first driven gear (5), activity has been engaged three groups of adjustment gears (8), institute in the driving chain (4) It states adjustment gear (8) to be arranged between the first driving gear (3) and the first driven gear (5), in the adjustment gear (8) It being fixedly installed at the heart slide bar (9), the slide bar (9) is movably arranged between the sliding rail (11) in threaded rod (10) inner cavity, The outside screw of the threaded rod (10) is provided with outer nut (12), is fixedly installed push rod (13) on the outer nut (12), The push rod (13) abuts against with base plate one (14), base plate two (15) and base plate three (16) respectively, the base plate one (14) it is fixedly installed on extension rod (17), is fixedly installed shaft (18) on the extension rod (17), on the shaft (18) It is movably set with compression roll (19), is fixedly installed on the base plate two (15) screed (20), the base plate three (16) On be fixedly installed rake teeth (21).
- The head 2. a kind of road asphalt according to claim 1 paves, it is characterised in that: first driven gear (5) It is fixedly installed at center column (6), the column (6) is movably arranged on bearing bottom far from the one end of the first driven gear (5) In seat (7).
- The head 3. a kind of road asphalt according to claim 1 paves, it is characterised in that: threaded rod (10) the activity setting In annulus bearing (22), the annulus bearing (22) is fixed in the mounting groove that transverse slat (23) opens up, the transverse slat (23) two sides are symmetrically fixedly installed support column (24).
- 4. a kind of installation apparatus, including car bottom plate (25), it is characterised in that: further include described in claim 1-3 any one Road asphalt paves head, the car bottom plate (25) and base plate one (14), base plate two (15), between base plate three (16) respectively It is connected with connecting spring (251), is provided with cockpit (26) on the car bottom plate (25), it is solid on the dual-axle motor (1) Surely it is provided with second driving shaft (27), the second driving shaft (27) runs through the side wall of car bottom plate (25), the second driving shaft (27) it is fixedly installed on the second driving gear (28), the second driving gear (28) activity is engaged in stirring chain (29) in, activity has been engaged the second driven gear (30) in the stirring chain (29), second driven gear (30) Center at be fixedly installed auger bar (31), the auger bar (31) is arranged in hopper (32), the hopper (32) feed inlet (33) and discharge nozzle (34) are respectively arranged on.
- 5. a kind of installation apparatus according to claim 4, it is characterised in that: the dual-axle motor (1) is fixed at vehicle In the inner cavity of bottom plate (25), the bearing base (7) is fixed in the inner cavity of car bottom plate (25), and the support column (24) is solid It is fixed to be arranged in the inner cavity of car bottom plate (25).
- 6. a kind of installation apparatus according to claim 4, it is characterised in that: the two sides of the car bottom plate (25) are symmetrical It is provided with connector (35), is fixedly installed roller bearing (36) on the connector (35), be provided with pinch roller on the roller bearing (36) (37)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910567812.7A CN110158422A (en) | 2019-06-27 | 2019-06-27 | A kind of road asphalt paves head and its installation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910567812.7A CN110158422A (en) | 2019-06-27 | 2019-06-27 | A kind of road asphalt paves head and its installation apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110158422A true CN110158422A (en) | 2019-08-23 |
Family
ID=67636849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910567812.7A Pending CN110158422A (en) | 2019-06-27 | 2019-06-27 | A kind of road asphalt paves head and its installation apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110158422A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267358A (en) * | 2020-10-16 | 2021-01-26 | 温州融宸科技有限公司 | Road and bridge laying device |
| CN112281598A (en) * | 2020-10-30 | 2021-01-29 | 合肥清雅装饰工程有限公司 | Paver is used in road and bridge construction |
| CN112695591A (en) * | 2020-12-25 | 2021-04-23 | 邢凯 | Energy-saving adjusting baffle for asphalt road paving |
| CN112853908A (en) * | 2021-02-26 | 2021-05-28 | 深圳市竟碧亮科技有限公司 | Asphalt laying vehicle for repairing road pits |
| CN114763691A (en) * | 2021-01-14 | 2022-07-19 | 约瑟夫福格勒公司 | Adjustment of the tamping stroke |
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| US20140050526A1 (en) * | 2012-08-16 | 2014-02-20 | Michael Rees | Mechanized Asphalt Comb |
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| CN204530398U (en) * | 2015-04-14 | 2015-08-05 | 邓洪涛 | A kind of heat-regenerating paver of asphalt pavement |
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| CN208183494U (en) * | 2018-05-16 | 2018-12-04 | 江苏宿迁交通工程建设有限公司 | A kind of bituminous concrete lying device of adjustable thickness |
| CN109183575A (en) * | 2018-11-07 | 2019-01-11 | 杜红东 | A kind of construction asphalt paving device |
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| US20140050526A1 (en) * | 2012-08-16 | 2014-02-20 | Michael Rees | Mechanized Asphalt Comb |
| CN204435172U (en) * | 2015-02-10 | 2015-07-01 | 李宜敬 | A kind of heat-regenerating paver of asphalt pavement |
| CN204530398U (en) * | 2015-04-14 | 2015-08-05 | 邓洪涛 | A kind of heat-regenerating paver of asphalt pavement |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267358A (en) * | 2020-10-16 | 2021-01-26 | 温州融宸科技有限公司 | Road and bridge laying device |
| CN112281598A (en) * | 2020-10-30 | 2021-01-29 | 合肥清雅装饰工程有限公司 | Paver is used in road and bridge construction |
| CN112695591A (en) * | 2020-12-25 | 2021-04-23 | 邢凯 | Energy-saving adjusting baffle for asphalt road paving |
| CN114763691A (en) * | 2021-01-14 | 2022-07-19 | 约瑟夫福格勒公司 | Adjustment of the tamping stroke |
| CN112853908A (en) * | 2021-02-26 | 2021-05-28 | 深圳市竟碧亮科技有限公司 | Asphalt laying vehicle for repairing road pits |
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Application publication date: 20190823 |
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