CN111719393A - A laying device for highway road surface pitch - Google Patents
A laying device for highway road surface pitch Download PDFInfo
- Publication number
- CN111719393A CN111719393A CN202010620990.4A CN202010620990A CN111719393A CN 111719393 A CN111719393 A CN 111719393A CN 202010620990 A CN202010620990 A CN 202010620990A CN 111719393 A CN111719393 A CN 111719393A
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- Prior art keywords
- asphalt
- material box
- connecting block
- rotating shaft
- support
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 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
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- 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
- E01C19/4806—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 solely rollers for consolidating or finishing
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a paving device for highway pavement asphalt, which comprises two brackets, wherein the two brackets are symmetrically and vertically arranged, and the bottom ends of the brackets are fixedly connected with at least one traveling wheel; the front ends of the two supports are fixedly connected with a material box together, the material box is horizontally arranged and adopts a telescopic structure, the upper end of the material box is opened, and the bottom end of the material box is communicated with a material discharging hopper; two pairs of folding roller sets are arranged between the two supports, the folding roller sets are connected with the supports in a sliding mode, and the folding roller sets are horizontally arranged. According to the invention, the first rotating shaft and the first compression roller in the folding roller group are arranged in an X shape, and the first rotating shaft arranged in the X shape can enable the first compression roller to simulate the scene of automobile lane changing during movement, so that the asphalt pavement layer structure is more stable, and the asphalt pavement layer can well bear the pressure of straight line driving and the pressure of automobile lane changing.
Description
Technical Field
The invention relates to the technical field of pavement construction equipment, in particular to a paving device for highway pavement asphalt.
Background
Asphalt pavements are various types of pavements formed by spreading and rolling asphalt concrete. The asphalt concrete is a mixture formed by fully mixing asphalt materials with certain viscosity and proper dosage and mineral aggregates with certain gradation. Asphalt concrete as an asphalt pavement material is subjected to repeated action of vehicle load and long-term influence of environmental factors in the use process. Therefore, asphalt concrete must have good durability against the action of natural factors while having a certain bearing capacity. That is, the asphalt pavement should exhibit sufficient stability in high temperature environment, crack resistance in low temperature condition, good water stability, durable aging resistance, and good skid resistance for safety, so as to ensure good service function of the asphalt pavement.
In the prior art, asphalt is usually paved on high-speed highway road surfaces by adopting equipment such as a road roller and the like, and pavement construction is carried out by arranging one or more rollers at the front side of a vehicle, but the equipment has the following defects: 1. the pavement width is small, and the pavement needs to be paved repeatedly by a road roller due to the width of a vehicle body; 2. the vehicle body can only lay the asphalt along a straight line, so that the laid asphalt can better bear the pressure of the same straight line track as that of the road roller, but the bearing capacity of the vehicle lane changing inclined driving behavior is relatively poor, the flatness of the asphalt pavement is easily changed for a long time, and the local height fluctuation of the pavement is easily caused.
Disclosure of Invention
The invention aims to solve the problems and provides a paving device for highway pavement asphalt.
In order to achieve the purpose, the invention adopts the following technical scheme:
the paving device for the highway pavement asphalt comprises two supports, wherein the two supports are symmetrically and vertically arranged, and the bottom ends of the supports are fixedly connected with at least one traveling wheel;
the front ends of the two supports are fixedly connected with a material box together, the material box is horizontally arranged and adopts a telescopic structure, the upper end of the material box is opened, and the bottom end of the material box is communicated with a material discharging hopper;
two pairs of folding roller groups are arranged between the two brackets together, the folding roller groups are connected with the brackets in a sliding manner, and the folding roller groups are horizontally arranged;
two the equal fixedly connected with roof-rack in top of support, be provided with horizontal adjustment mechanism on the roof-rack, the support sets up the output at horizontal adjustment mechanism, two the one end that the roof-rack is close to each other is connected with the flexible adjustment mechanism who drives the two and be close to each other or keep away from the motion jointly.
Preferably, the workbin adopts metal material, and workbin and play hopper bend into rhombus structure.
Preferably, the folding roller group comprises first compression rollers, first rotating shafts, bearing seats and a center block, the number of the first rotating shafts is two, the first compression rollers are fixedly sleeved on the first rotating shafts, the bearing seats are sleeved at two ends of the first rotating shafts, one ends of the bearing seats, far away from the first rotating shafts, are fixedly connected with connecting blocks, one ends of the connecting blocks are rotatably connected with the center block, the other ends of the connecting blocks are rotatably connected with sliding blocks, sliding grooves are horizontally formed in the support, and the sliding blocks are slidably connected in the sliding grooves.
Preferably, the number of the first rotating shafts is four, and the first rotating shafts are arranged in an X shape.
Preferably, the rear ends of the two brackets are provided with a telescopic roller together, and the telescopic roller is composed of a second rotating shaft, a second pressing roller and an elastic part;
the second compression roller fixing sleeve is arranged on the second rotating shaft in a sleeved mode, the two ends of the second rotating shaft are connected with elastic pieces in a rotating mode, and one end, far away from the second rotating shaft, of each elastic piece is arranged on the support.
Preferably, the elastic part consists of a connecting block, a bearing, a limiting rod and a spring;
be provided with the bearing on the connecting block, the second pivot is passed through the bearing and is rotated the connection on the connecting block, the one end fixedly connected with that the second pivot was kept away from to the connecting block adopts the gag lever post of T type structure, the gag lever post clearance passes the support, the part cover that the gag lever post is located between support and the connecting block is equipped with the spring.
Preferably, the horizontal adjusting mechanism is composed of a handle, a one-way screw rod and a polished rod, the one-way screw rod is fixedly connected with the handle, a groove is horizontally formed in the bottom end of the top frame, the one-way screw rod is rotatably connected in the groove, two ends of the polished rod are welded in the groove, the support is in threaded connection with the one-way screw rod, and the support is in sliding connection with the polished rod.
Preferably, flexible adjustment mechanism comprises special-shaped nut, two-way screw rod and dog, the both ends screw thread of two-way screw rod sets up in reverse, the quantity of special-shaped nut is two, and set up respectively with two-way screw rod complex levogyration internal thread and dextrorotation internal thread, two special-shaped nuts respectively with two roof-racks welding.
The invention has the following advantages:
1. according to the invention, the first rotating shaft and the first compression roller in the folding roller group are arranged in an X shape, and the first rotating shaft arranged in the X shape can enable the first compression roller to simulate the scene of automobile lane changing during movement, so that the asphalt pavement layer structure is more stable, and the asphalt pavement layer can well bear the pressure of straight line driving and the pressure of automobile lane changing.
2. The telescopic rollers play two roles, one of the telescopic rollers is linearly paved, and the gap between the two pairs of folding roller groups is further flattened, so that the road surface is smoother.
3. The elastic piece is arranged to play a stabilizing role, the second pressing roller can maximally avoid axial movement under the elastic force of the elastic piece, and can be positioned at a middle position, so that the second pressing roller can further process the laying blind area of the center block in the folding roller group.
4. The horizontal adjusting mechanism can realize the left-right adjustment of the two brackets on the top frame, thereby better adapting to the complex conditions at the two sides of the asphalt pavement and having better flexibility.
5. The telescopic adjusting mechanism can realize the mutual approaching or separating movement of the top frame and the support at the two sides, but the top frame and the support at the two sides are convenient to store and transport when moving close to each other, and can conveniently walk on the two sides of the asphalt road through the walking wheels when moving away from each other, so that the walking wheels are prevented from influencing the flatness in the laying construction process.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic view of the first roll segment of the invention in the boss 1;
FIG. 3 is a schematic view of a portion of the elastic member of the present invention;
fig. 4 is a front view of the present invention.
In the figure: the device comprises a support 1, a sliding groove 2, a sliding block 3, a connecting block 4, a bearing seat 5, a first compression roller 6, a first rotating shaft 7, a center block 8, a spring 9, a second rotating shaft 10, a limiting rod 11, a bearing 12, a connecting block 13, a second compression roller 14, a traveling wheel 15, a top frame 16, a handle 17, a groove 18, a one-way screw rod 19, a polished rod 20, a special-shaped nut 21, a two-way screw rod 22, a stop block 23, a feed box 24 and a discharge hopper 25.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-4, a paving device for highway pavement asphalt comprises two supports 1, wherein the two supports 1 are symmetrically and vertically arranged, and at least one traveling wheel 15 is fixedly connected to the bottom ends of the supports 1.
The front ends of the two supports 1 are fixedly connected with a feed box 24 together, the feed box 24 is horizontally arranged, the feed box 24 is of a telescopic structure, the upper end of the feed box 24 is open, and the bottom end of the feed box 24 is communicated with a discharge hopper 25.
Two pairs of folding roller sets are arranged between the two supports 1, the folding roller sets are connected with the supports 1 in a sliding mode, and the folding roller sets are arranged horizontally.
The equal fixedly connected with roof-rack 16 in top of two supports 1 is provided with horizontal adjustment mechanism on the roof-rack 16, and the support setting is at horizontal adjustment mechanism's output, and the one end that two roof-racks 16 are close to each other is connected with the flexible adjustment mechanism who drives the two and be close to each other or keep away from the motion jointly.
In this embodiment, workbin 24 adopts the metal material, and workbin 24 and play hopper 25 buckle into the rhombus structure, and the rhombus structure stability is relatively poor, therefore can buckle, can buckle when the support 1 along with both sides is close to each other or is kept away from the motion.
Folding cylinder group is by the same first compression roller 6 of quantity, first pivot 7, bearing frame 5 and center block 8 constitute, the quantity of first pivot 7 is two, 6 fixed cover of first compression roller are established on first pivot 7, the both ends of first pivot 7 are all overlapped and are equipped with bearing frame 5, the one end fixedly connected with connecting block 4 of first pivot 7 is kept away from to bearing frame 5, wherein one end connecting block 4 rotates with center block 8 to be connected, other end connecting block 4 rotates and is connected with slider 3, set up the spout 2 that has the level to set up on the support 1, 3 sliding connection of slider is in spout 2.
In this embodiment, the quantity of first pivot 7 is four, and is the setting of X type, and the first pivot 7 that the X type set up can be so that first compression roller 6 simulates the scene that the car changes the way when moving to make pitch road surface layer structure more stable, both can be fine bear the pressure that the straight line was gone, also can bear the pressure that the car changes the way.
The rear ends of the two supports 1 are provided with a telescopic roller which is composed of a second rotating shaft 10, a second pressing roller 14 and an elastic part. The second compression roller 14 is fixedly sleeved on the second rotating shaft 10, two ends of the second rotating shaft 10 are rotatably connected with elastic pieces, and one end of each elastic piece, which is far away from the second rotating shaft 10, is arranged on the support 1.
The telescopic rollers play two roles, one of the telescopic rollers is laid linearly, and the gap between the two pairs of folding roller sets is further flattened, so that the road surface is smoother.
The elastic element is composed of a connecting block 13, a bearing 12, a limiting rod 11 and a spring 9. Be provided with bearing 12 on the connecting block 13, second pivot 10 rotates through bearing 12 and connects on connecting block 13, and the one end fixedly connected with that second pivot 10 was kept away from to connecting block 13 adopts the gag lever post 11 of T type structure, and support 1 is passed in the gag lever post 11 clearance, and the part cover that gag lever post 11 is located between support 1 and connecting block 13 is equipped with spring 9.
The setting of elastic component has played stable effect, and under the elastic force of elastic component, axial motion can be avoided to the maximize to second compression roller 14, also can be so that second compression roller 14 is located comparatively middle part's position for second compression roller 14 can carry out further processing to the blind area of laying of center block 8 in the folding cylinder group.
The horizontal adjusting mechanism is composed of a handle 17, a one-way screw rod 19 and a polished rod 20, the one-way screw rod 19 is fixedly connected with the handle 17, a slot 18 is horizontally formed in the bottom end of the top frame 16, the one-way screw rod 19 is rotatably connected in the slot 18, two ends of the polished rod 20 are welded in the slot 18, the support 1 is in threaded connection with the one-way screw rod 19, and the support 1 is in sliding connection with the polished rod 20.
Horizontal adjustment mechanism's setting can realize two supports 1 and adjust about on roof-rack 16 to the complicated situation of better adaptation bituminous paving both sides, the flexibility is better.
The telescopic adjusting mechanism is composed of special-shaped nuts 21, a bidirectional screw rod 22 and a stop block 23, threads at two ends of the bidirectional screw rod 22 are reversely arranged, the number of the special-shaped nuts 21 is two, left-handed internal threads and right-handed internal threads matched with the bidirectional screw rod 22 are respectively arranged, and the two special-shaped nuts 21 are respectively welded with the two top frames 16.
The roof-rack 16 and the support 1 that flexible adjustment mechanism's setting can realize both sides are close to each other or keep away from the motion, but the two is convenient for accomodate when being close to the motion each other, the transportation of being convenient for, when hungry keeping away from the motion each other, is convenient for walk in the both sides of pitch road through walking wheel 15, avoids walking wheel 15 to influence the roughness of laying the work progress.
The walking wheels 15 can be connected with a motor, so that the walking wheels 15 can drive the support 1 to advance through the motor, materials are shoveled into a material box 24 at the front end of the support 1 by manpower in the continuous advancing process, and the materials in the material box 24 are slowly discharged through a discharging hopper 25, as shown in fig. 1.
During the walking process, the asphalt is paved by the rolling of the first press roll 6 and the second press roll 14, as shown in fig. 1.
When the distance between the two supports 1 needs to be adjusted in a large range, the bidirectional screw 22 is rotated by manpower or tools, the bidirectional screw 22 drives the special-shaped nuts 21 on the two sides to move close to or away from each other, and the stop block 23 is arranged to prevent the special-shaped nuts 21 from falling off from the bidirectional screw 22 to cause the device to be scattered.
When the support 1 on one side needs to be adjusted in a small range, for example, when construction materials are accumulated on one side of an asphalt road or an obstacle exists, the gap between the traveling wheel on the side and the asphalt road surface needs to be enlarged at the moment so as to stride over the construction materials, the handle 17 is driven to rotate by manpower or tools, the handle 17 drives the one-way screw 19 to rotate, the one-way screw 19 drives the support 1 in threaded connection with the one-way screw to move horizontally, and the support 1 is connected to the polished rod 20 in a sliding mode, so that the stability of the support 1 in movement can be improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention. In the present invention, unless otherwise specifically stated or limited, the terms "cover", "fitted", "attached", "fixed", "distributed", and the like are to be understood in a broad sense, and may be, for example, fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (8)
1. The paving device for the asphalt on the highway pavement comprises two supports (1), and is characterized in that the two supports (1) are symmetrically and vertically arranged, and the bottom ends of the supports (1) are fixedly connected with at least one traveling wheel (15);
the front ends of the two supports (1) are fixedly connected with a material box (24) together, the material box (24) is horizontally arranged, the material box (24) adopts a telescopic structure, the upper end of the material box (24) is opened, and the bottom end of the material box (24) is communicated with a material discharging hopper (25);
two pairs of folding roller sets are arranged between the two brackets (1) together, the folding roller sets are connected with the brackets (1) in a sliding manner, and the folding roller sets are arranged horizontally;
two equal fixedly connected with roof-rack (16) in top of support (1), be provided with horizontal adjustment mechanism on roof-rack (16), the support sets up at horizontal adjustment mechanism's output, two the one end that roof-rack (16) are close to each other is connected with the flexible adjustment mechanism who drives the two and be close to each other or keep away from the motion jointly.
2. A laying device for asphalt on highway pavements according to claim 1 characterized in that the material box (24) is made of metal and the material box (24) and the discharge hopper (25) are bent into a diamond structure.
3. The paving apparatus for asphalt of highway pavement according to claim 1, the folding roller group consists of first pressing rollers (6), first rotating shafts (7), bearing seats (5) and a central block (8) which are the same in number, the number of the first rotating shafts (7) is two, the first press roller (6) is fixedly sleeved on the first rotating shafts (7), bearing seats (5) are sleeved at two ends of the first rotating shaft (7), a connecting block (4) is fixedly connected at one end of each bearing seat (5) far away from the first rotating shaft (7), wherein one end of the connecting block (4) is rotationally connected with the central block (8), the other end of the connecting block (4) is rotationally connected with the sliding block (3), the support (1) is provided with a sliding groove (2) which is horizontally arranged, and the sliding block (3) is connected in the sliding groove (2) in a sliding manner.
4. A laying device for highway pavement asphalt according to claim 3, characterized in that the number of the first rotating shafts (7) is four and arranged in an X-shape.
5. The paving device for the highway pavement asphalt according to the claim 1, characterized in that the rear ends of the two brackets (1) are provided with a telescopic roller together, and the telescopic roller is composed of a second rotating shaft (10), a second pressing roller (14) and an elastic member;
the second compression roller (14) is fixedly sleeved on the second rotating shaft (10), the two ends of the second rotating shaft (10) are connected with elastic pieces in a rotating mode, and one end, far away from the second rotating shaft (10), of each elastic piece is arranged on the support (1).
6. A laying device for highway pavement asphalt according to claim 5, wherein the elastic member is composed of a connecting block (13), a bearing (12), a limiting rod (11) and a spring (9);
be provided with bearing (12) on connecting block (13), second pivot (10) rotate through bearing (12) and connect on connecting block (13), the one end fixedly connected with that second pivot (10) was kept away from in connecting block (13) adopts gag lever post (11) of T type structure, support (1) is passed in gag lever post (11) clearance, the part cover that gag lever post (11) are located between support (1) and connecting block (13) is equipped with spring (9).
7. The paving device for the asphalt on the highway pavement according to claim 1, wherein the horizontal adjusting mechanism comprises a handle (17), a one-way screw (19) and a polish rod (20), the one-way screw (19) is fixedly connected with the handle (17), a slot (18) is horizontally formed in the bottom end of the top frame (16), the one-way screw (19) is rotatably connected in the slot (18), two ends of the polish rod (20) are welded in the slot (18), the bracket (1) is in threaded connection with the one-way screw (19), and the bracket (1) is in sliding connection with the polish rod (20).
8. The paving device for the asphalt on the highway pavement according to claim 1, wherein the telescopic adjusting mechanism is composed of special-shaped nuts (21), two-way screw rods (22) and a stop block (23), threads at two ends of each two-way screw rod (22) are reversely arranged, the number of the special-shaped nuts (21) is two, left-handed internal threads and right-handed internal threads matched with the two-way screw rods (22) are respectively arranged, and the two special-shaped nuts (21) are respectively welded with the two top frames (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010620990.4A CN111719393B (en) | 2020-06-30 | 2020-06-30 | A laying device for highway road surface pitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010620990.4A CN111719393B (en) | 2020-06-30 | 2020-06-30 | A laying device for highway road surface pitch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111719393A true CN111719393A (en) | 2020-09-29 |
| CN111719393B CN111719393B (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010620990.4A Active CN111719393B (en) | 2020-06-30 | 2020-06-30 | A laying device for highway road surface pitch |
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| CN (1) | CN111719393B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200361562Y1 (en) * | 2004-04-29 | 2004-09-14 | 이태형 | Soil siment Finisher |
| CN105181478A (en) * | 2015-09-07 | 2015-12-23 | 哈尔滨工业大学 | Testing system and testing method applied to testing of high temperature deformation resistance of asphalt airport pavement |
| CN107489084A (en) * | 2016-06-13 | 2017-12-19 | 宝马格有限公司 | Soil compaction with wheel cover particularly rubber-tired roller and wheel cover |
| CN206986679U (en) * | 2017-05-03 | 2018-02-09 | 中交一航局第一工程有限公司 | A kind of hot tamping drum device of asphalt roads laying |
| CN110670452A (en) * | 2019-09-25 | 2020-01-10 | 徐州锦程行星传动有限公司 | Road roller |
| CN111305010A (en) * | 2020-03-19 | 2020-06-19 | 张毅 | Road asphalt laying device and asphalt laying method |
| CN111305009A (en) * | 2019-12-09 | 2020-06-19 | 张含 | Highway construction asphalt paving construction tool |
-
2020
- 2020-06-30 CN CN202010620990.4A patent/CN111719393B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200361562Y1 (en) * | 2004-04-29 | 2004-09-14 | 이태형 | Soil siment Finisher |
| CN105181478A (en) * | 2015-09-07 | 2015-12-23 | 哈尔滨工业大学 | Testing system and testing method applied to testing of high temperature deformation resistance of asphalt airport pavement |
| CN107489084A (en) * | 2016-06-13 | 2017-12-19 | 宝马格有限公司 | Soil compaction with wheel cover particularly rubber-tired roller and wheel cover |
| CN206986679U (en) * | 2017-05-03 | 2018-02-09 | 中交一航局第一工程有限公司 | A kind of hot tamping drum device of asphalt roads laying |
| CN110670452A (en) * | 2019-09-25 | 2020-01-10 | 徐州锦程行星传动有限公司 | Road roller |
| CN111305009A (en) * | 2019-12-09 | 2020-06-19 | 张含 | Highway construction asphalt paving construction tool |
| CN111305010A (en) * | 2020-03-19 | 2020-06-19 | 张毅 | Road asphalt laying device and asphalt laying method |
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| CN111719393B (en) | 2021-08-06 |
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Inventor after: Qin Feng Inventor after: Lian Yanxia Inventor after: Li Xiaohu Inventor after: Bi Haojun Inventor after: Zhao Zibo Inventor after: Liu Anning Inventor after: Du Yi Inventor before: Qin Feng Inventor before: Du Yi Inventor before: Bi Haojun Inventor before: Zhao Zibo Inventor before: Li Xiaohu Inventor before: Liu Anning Inventor before: Lian Yanxia |
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