CN108487014B - Linear type road shoulder stone laying machine - Google Patents
Linear type road shoulder stone laying machine Download PDFInfo
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- CN108487014B CN108487014B CN201810283942.3A CN201810283942A CN108487014B CN 108487014 B CN108487014 B CN 108487014B CN 201810283942 A CN201810283942 A CN 201810283942A CN 108487014 B CN108487014 B CN 108487014B
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- rectangular shell
- transmission
- motor
- angle bending
- tool bit
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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
- E01C19/52—Apparatus for laying individual preformed surfacing elements, e.g. kerbstones
Abstract
The invention discloses a linear type road shoulder stone laying machine which comprises a rectangular shell, a tool bit cleaning device, a road shoulder stone clamping device, a slurry spraying device, a hydraulic working device, a traveling device and a control device. The control main board is mainly used for setting and operating the machine, so that the control main board has a value which can be popularized.
Description
Technical Field
The invention relates to the field of paving work of road shoulder stones in road construction, in particular to a linear type road shoulder stone paving machine.
Background
The road paving aims at improving a road traffic system and is a basic guarantee for social development. The end stage of road paving usually needs to consume a large amount of manpower and material resources to pave the shoulder stones on both sides of the road, the paving process of the shoulder stones is quite complicated, the paving efficiency through manpower is not very high, and the paved shoulder stones are not necessarily regular. In order to solve the above problems, the present invention proposes a linear type road shoulder stone paver which can effectively improve the above problems.
Disclosure of Invention
The invention aims to provide a linear type road shoulder stone laying machine which reduces the labor consumption, increases the laying efficiency and has wider applicability so as to solve the problems in the background technology.
In order to solve the technical problems, the invention adopts the technical scheme that:
a linear type road shoulder stone laying machine comprises a rectangular shell, a tool bit cleaning device, a road shoulder stone clamping device, a slurry spraying device, a hydraulic working device, a traveling device and a control device;
the left side surface and the front side surface of the rectangular shell are both in a rectangular opening shape, the upper end surface and the lower end surface of the rectangular shell are both in an opening end, and a horizontal partition plate is arranged inside the rectangular shell to form a concave cavity;
the cleaning tool bit device comprises a cleaning tool bit, a tool bit fixing support, a horizontal groove frame, a vertical groove frame, a transmission bevel gear shaft, a first motor, a motor end bevel gear, a first transmission chain, a first transmission tooth, a second transmission tooth and a cone-shaped link gear, wherein the transmission bevel gear shaft is arranged at the front end of the left side surface of the rectangular shell and penetrates through the left side surface of the rectangular shell, the shaft end of the transmission bevel gear shaft is positioned outside the rectangular shell, the shaft end of the transmission bevel gear shaft is concentrically provided with the first transmission tooth, the tooth end of the transmission bevel gear shaft is positioned inside the rectangular shell and is meshed with the cone-shaped link gear, one end of the tool bit fixing support is connected with the shaft end of the cone-shaped link gear in a penetrating way, the other end of the tool bit fixing support is connected with the shaft end of the cleaning tool bit in a penetrating way, the shaft end of the cleaning tool bit is provided with the second transmission, the horizontal slotted frame is fixed at the front end of the left side face of the rectangular shell, the upper end of the vertical slotted frame is fixed through an adjusting screw, the lower end of the vertical slotted frame is hinged to the middle of the cutter head fixing support, the first motor is arranged inside the rectangular shell, the output end of the first motor is provided with the motor end bevel gear, and the motor end bevel gear is meshed with the tooth end of the conical link gear;
the road shoulder stone clamping device comprises a right-angle bending clamp plate, a right-angle bending sliding plate, a first hydraulic rod, a second hydraulic rod and a third hydraulic rod, wherein the right-angle bending sliding plate is arranged at the lower end of a horizontal partition plate in a rectangular shell, the upper end surface of the horizontal part of the right-angle bending sliding plate is provided with two sliding grooves perpendicular to the left side surface of the rectangular shell, the lower end surface of the horizontal partition plate is provided with two sliding rails matched with the two sliding grooves, the lower end surface of the horizontal part of the right-angle bending sliding plate is connected with the upper end surface of the horizontal part of the right-angle bending clamp plate through the arrangement of the first hydraulic rod, the second hydraulic rod is arranged between the vertical part of the right-angle bending sliding plate and the inner side of the right side surface of the rectangular shell, the vertical part of the right-angle bending sliding plate is perpendicular to the horizontal part of, the clamping plate is vertical to the horizontal part of the right-angle bending clamping plate;
the slurry spraying device comprises a slurry pump and a cement slurry storage tank, the slurry pump and the cement slurry storage tank are arranged on the horizontal partition plate, the slurry pump pipeline is communicated with the cement slurry storage tank, and the cement slurry spraying end of the slurry pump is communicated with a cement slurry spraying port arranged in a cavity below the lower end surface of the horizontal partition plate through a pipeline;
the hydraulic working device comprises a hydraulic oil tank and a hydraulic oil pump, the hydraulic oil tank and the hydraulic oil pump are arranged on the horizontal partition plate, a pipeline of the hydraulic oil pump is communicated with the hydraulic oil tank, and the hydraulic oil pump respectively provides hydraulic power for the first hydraulic rod, the second hydraulic rod and the third hydraulic rod;
the traveling device comprises a second motor, a third transmission gear, a fourth transmission gear, a second transmission chain and traveling wheels which are respectively positioned at four corners of the bottom end of the rectangular shell, the second motor is arranged in an interlayer at the rear side surface of the rectangular shell, the third transmission gear is concentrically arranged at the output end of the second motor, two adjacent traveling wheels close to the rear side surface of the rectangular shell are coaxial, the fourth transmission gear is arranged on a shaft, and the third transmission gear is in transmission connection with the fourth transmission gear through the second transmission chain;
the control device is arranged on the horizontal partition board and comprises a control main board, a storage battery and a distance inductor, wherein the distance inductor is arranged in the middle of the inner side of the rear side face of the rectangular shell.
Furthermore, the upper end face of the rectangular shell is hinged with a turnover cover.
Furthermore, the storage battery adopts a lithium battery with light weight and high power storage capacity, and the power supply end of the storage battery is respectively connected with the control mainboard, the first motor, the second motor, the slurry pump and the hydraulic oil pump.
Furthermore, the output control end of the control main board is respectively connected with the first motor, the second motor, the mud pump and the hydraulic oil pump in a control mode.
Furthermore, rubber pads are arranged on the clamping surfaces of the clamping plates and the inner sides, adjacent to the vertical portions of the right-angle bending clamping plates, of the clamping plates.
The invention has the beneficial effects that:
the structure of the invention provides a linear type road shoulder stone laying machine which is simple and novel in structure and convenient to use, reduces the use of personnel, completes the laying work of road shoulder stones by using less personnel, greatly improves the laying efficiency of the road shoulder stones, reduces the complex process of laying the road shoulder stones to a certain extent, mainly utilizes a control main board to set and operate the machine, and has a value capable of being popularized.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is another schematic diagram of the present invention.
Fig. 3 is a top view of the present invention.
Fig. 4 is a diagram of the working state of the present invention.
Fig. 5 is a view of the internal cavity structure of the present invention.
Fig. 6 is a left side view of the present invention.
Fig. 7 is a schematic view of the structure of the cleaning head.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 7, the invention provides a linear type road shoulder stone laying machine, which comprises a rectangular shell 1, a tool bit cleaning device, a road shoulder stone clamping device, a slurry spraying device, a hydraulic working device, a traveling device and a control device, wherein the tool bit cleaning device is arranged on the rectangular shell;
the left side surface and the front side surface of the rectangular shell 1 are both in a rectangular opening shape, the upper end surface and the lower end surface of the rectangular shell are both in an opening end, and a horizontal partition plate 2 is arranged in the rectangular shell 1 to form a concave cavity;
the cleaning tool bit device comprises a cleaning tool bit 3-1, a tool bit fixing support 3-2, a horizontal groove frame 3-3, a vertical groove frame 3-4, a transmission bevel gear shaft 3-5, a first motor 3-6, a motor end bevel gear 3-7, a first transmission chain 3-8, a first transmission gear 3-9, a second transmission gear 3-10 and a conical link gear 3-11, wherein the transmission bevel gear shaft 3-5 is arranged at the front end of the left side face of a rectangular shell 1 and penetrates through the left side face of the rectangular shell 1, the shaft end of the transmission bevel gear shaft 3-5 is positioned outside the rectangular shell 1, the shaft end of the transmission bevel gear shaft is concentrically provided with the first transmission gear 3-9, the gear end of the transmission bevel gear shaft 3-5 is positioned inside the rectangular shell 1 and is meshed with the conical link gear 3-11, one end of the cutter head fixing support 3-2 is connected with the shaft end of the conical link gear 3-11 in a penetrating way, the other end of the cutter head fixing support 3-2 is connected with the shaft end of the cleaning cutter head 3-1 in a penetrating way, the shaft end of the cleaning cutter head 3-1 is provided with the second transmission gear 3-10, the first transmission gear 3-9 and the second transmission gear 3-10 are connected with each other in a transmission way through a first transmission chain 3-8, the horizontal groove frame 3-3 is fixed at the front end of the left side surface of the rectangular shell 1, the upper end of the vertical groove frame 3-4 is fixed through an adjusting screw 3-12, the lower end of the vertical groove frame is hinged with the middle part of the cutter head fixing support 3-2, the first motor 3-6 is arranged inside the rectangular shell 1, and the output end of the first motor 3-6 is provided with the motor end, the motor end bevel gear 3-7 is meshed with the tooth end of the conical link gear 3-11;
the road shoulder stone clamping device comprises a right-angle bending clamping plate 4-1, a clamping plate 4-2, a right-angle bending sliding plate 4-3, a first hydraulic rod 4-4, a second hydraulic rod 4-5 and a third hydraulic rod 4-6, wherein the right-angle bending sliding plate 4-3 is arranged at the lower end of a horizontal partition plate 2 in a rectangular shell 1, two sliding grooves 4-7 vertical to the left side surface of the rectangular shell 1 are formed in the upper end surface of the horizontal part of the right-angle bending sliding plate 4-3, two sliding rails 4-8 matched with the two sliding grooves 4-7 are arranged on the lower end surface of the horizontal partition plate 2, the lower end surface of the horizontal part of the right-angle bending sliding plate 4-3 is connected with the upper end surface of the horizontal part of the right-angle bending clamping plate 4-1 through the first hydraulic rod 4-4, and the second hydraulic rod 4-3 is arranged between the vertical part of the right-angle bending sliding 5, a vertical part of the right-angle bending sliding plate 4-3 is perpendicular to a horizontal part of the right-angle bending clamping plate 4-1, the inner side surface of the vertical part of the right-angle bending clamping plate 4-1 is connected with the clamping plate 4-2 through arranging a third hydraulic rod 4-6, and the clamping plate 4-2 is perpendicular to the horizontal part of the right-angle bending clamping plate 4-1;
the slurry spraying device comprises a slurry pump 5-1 and a cement slurry storage tank 5-2, wherein the slurry pump 5-1 and the cement slurry storage tank 5-2 are arranged on the horizontal partition plate 2, a pipeline of the slurry pump 5-1 is communicated with the cement slurry storage tank 5-2, and a cement slurry spraying end of the slurry pump 5-1 is communicated with a cement slurry spraying port 5-3 arranged in a cavity below the lower end surface of the horizontal partition plate 2 through a pipeline;
the hydraulic working device comprises a hydraulic oil tank 6-1 and a hydraulic oil pump 6-2, the hydraulic oil tank 6-1 and the hydraulic oil pump 6-2 are arranged on the horizontal partition plate 2, the hydraulic oil pump 6-2 is communicated with the hydraulic oil tank 6-1 through a pipeline, and the hydraulic oil pump 6-2 respectively provides hydraulic power for the first hydraulic rod 4-4, the second hydraulic rod 4-5 and the third hydraulic rod 4-6;
the traveling device comprises a second motor 7-1, a third transmission gear 7-2, a fourth transmission gear 7-3, a second transmission chain 7-4 and traveling wheels 7-5 respectively positioned at four corners of the bottom end of the rectangular shell 1, the second motor 7-1 is arranged in an interlayer at the rear side surface of the rectangular shell 1, the third transmission gear 7-2 is concentrically arranged at the output end of the second motor 7-1, two adjacent traveling wheels 7-5 close to the rear side surface of the rectangular shell 1 are coaxial, the fourth transmission gear 7-3 is arranged on a shaft, and the third transmission gear 7-2 is in transmission connection with the fourth transmission gear 7-3 through the second transmission chain 7-4;
the control device is arranged on the horizontal partition board 2 and comprises a control main board 8-1, a storage battery 8-2 and a distance sensor 8-3, wherein the distance sensor 8-3 is arranged in the middle of the inner side of the rear side face of the rectangular shell 1.
The upper end face of the rectangular shell 1 is hinged with a turnover cover 9.
The storage battery 8-2 is a lithium battery with light weight and high electric storage capacity, and the power supply end of the storage battery 8-2 is respectively connected with the control mainboard 8-1, the first motor 3-6, the second motor 7-1, the slurry pump 5-1 and the hydraulic oil pump 6-2.
The output control end of the control main board is respectively connected with a first motor 3-6, a second motor 7-1, a slurry pump 5-1 and a hydraulic oil pump 6-2 in a control mode.
The working process is as follows: when the shoulder stone is used, workers need to place the shoulder stones close to the edge of the road into a straight line and enable the distance between the two shoulder stones to be close. The depth of the cleaning tool bit 3-1 is adjusted by workers through the tool bit fixing support 3-2, the horizontal groove frame 3-3 and the vertical groove frame 3-4 according to specific construction conditions, and the adjusting screw 3-12 is locked when the height is proper, so that the workers can inject cement paste from the grouting end of the cement paste storage box 5-2, and reset the machine control main board 8-1 according to parameters. The machine is started, the cleaning cutter head 3-1 is driven by the first motor 3-6 to rotate, and due to the special spiral structure, soil beside a road can be pushed to one side to clean a part of the soil for placing shoulder stones. The distance sensor 8-3 senses the distance between the machine and the curb stone in the advancing process of the machine, when the machine stops advancing after reaching a proper distance, the curb stone clamping device starts to work, the third hydraulic rod 4-6 starts to contract, so that the clamping plate 4-2 is close to the vertical part of the right-angle bending clamping plate 4-1, the function of clamping the curb stone is achieved, because the rubber pads 10 are arranged on the inner side clamping surfaces of the clamping plate 4-2 adjacent to the vertical part of the right-angle bending clamping plate 4-1, the effects of protecting the curb stone and increasing friction can be achieved, after the curb stone is clamped, the slurry pump 5-1 starts to work, cement slurry is sprayed on one end of the curb stone, meanwhile, the second hydraulic rod 4-5 starts to extend, the right-angle bending sliding plate 4-3 is pushed out of the cavity in the rectangular shell 1, and the entire curb stone clamping device extends out of the cavity in the rectangular shell, after the preset length is reached, the second hydraulic rod 4-5 stops extending, the first hydraulic rod 4-4 extends downwards at the moment, the curb stone is placed in an area cleaned by the cleaning tool bit 3-1, the third hydraulic rod 4-6 extends, so that the clamping plate 4-2 and the vertical part of the right-angle bending clamping plate 4-1 are separated from the curb stone, after the first hydraulic rod 4-4 contracts upwards to reach the original height, the second hydraulic rod 4-5 contracts to the original position, one-time paving work of the curb stone can be completed, and repeated operation can be controlled by controlling the main board 8-1 in multiple work. After the use, the storage battery 8-2 can be charged.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (5)
1. A linear type road shoulder stone laying machine is characterized by comprising a rectangular shell, a tool bit cleaning device, a road shoulder stone clamping device, a slurry spraying device, a hydraulic working device, a traveling device and a control device;
the left side surface and the front side surface of the rectangular shell are both in a rectangular opening shape, the upper end surface and the lower end surface of the rectangular shell are both in an opening end, and a horizontal partition plate is arranged inside the rectangular shell to form a concave cavity;
the cleaning tool bit device comprises a cleaning tool bit, a tool bit fixing support, a horizontal groove frame, a vertical groove frame, a transmission bevel gear shaft, a first motor, a motor end bevel gear, a first transmission chain, a first transmission tooth, a second transmission tooth and a cone-shaped link gear, wherein the transmission bevel gear shaft is arranged at the front end of the left side surface of the rectangular shell and penetrates through the left side surface of the rectangular shell, the shaft end of the transmission bevel gear shaft is positioned outside the rectangular shell, the shaft end of the transmission bevel gear shaft is concentrically provided with the first transmission tooth, the tooth end of the transmission bevel gear shaft is positioned inside the rectangular shell and is meshed with the cone-shaped link gear, one end of the tool bit fixing support is connected with the shaft end of the cone-shaped link gear in a penetrating way, the other end of the tool bit fixing support is connected with the shaft end of the cleaning tool bit in a penetrating way, the shaft end of the cleaning tool bit is provided with the second transmission, the horizontal slotted frame is fixed at the front end of the left side face of the rectangular shell, the upper end of the vertical slotted frame is fixed through an adjusting screw, the lower end of the vertical slotted frame is hinged to the middle of the cutter head fixing support, the first motor is arranged inside the rectangular shell, the output end of the first motor is provided with the motor end bevel gear, and the motor end bevel gear is meshed with the tooth end of the conical link gear;
the road shoulder stone clamping device comprises a right-angle bending clamp plate, a right-angle bending sliding plate, a first hydraulic rod, a second hydraulic rod and a third hydraulic rod, wherein the right-angle bending sliding plate is arranged at the lower end of a horizontal partition plate in a rectangular shell, the upper end surface of the horizontal part of the right-angle bending sliding plate is provided with two sliding grooves perpendicular to the left side surface of the rectangular shell, the lower end surface of the horizontal partition plate is provided with two sliding rails matched with the two sliding grooves, the lower end surface of the horizontal part of the right-angle bending sliding plate is connected with the upper end surface of the horizontal part of the right-angle bending clamp plate through the arrangement of the first hydraulic rod, the second hydraulic rod is arranged between the vertical part of the right-angle bending sliding plate and the inner side of the right side surface of the rectangular shell, the vertical part of the right-angle bending sliding plate is perpendicular to the horizontal part of, the clamping plate is vertical to the horizontal part of the right-angle bending clamping plate;
the slurry spraying device comprises a slurry pump and a cement slurry storage tank, the slurry pump and the cement slurry storage tank are arranged on the horizontal partition plate, the slurry pump pipeline is communicated with the cement slurry storage tank, and the cement slurry spraying end of the slurry pump is communicated with a cement slurry spraying port arranged in a cavity below the lower end surface of the horizontal partition plate through a pipeline;
the hydraulic working device comprises a hydraulic oil tank and a hydraulic oil pump, the hydraulic oil tank and the hydraulic oil pump are arranged on the horizontal partition plate, a pipeline of the hydraulic oil pump is communicated with the hydraulic oil tank, and the hydraulic oil pump respectively provides hydraulic power for the first hydraulic rod, the second hydraulic rod and the third hydraulic rod;
the traveling device comprises a second motor, a third transmission gear, a fourth transmission gear, a second transmission chain and traveling wheels which are respectively positioned at four corners of the bottom end of the rectangular shell, the second motor is arranged in an interlayer at the rear side surface of the rectangular shell, the third transmission gear is concentrically arranged at the output end of the second motor, two adjacent traveling wheels close to the rear side surface of the rectangular shell are coaxial, the fourth transmission gear is arranged on a shaft, and the third transmission gear is in transmission connection with the fourth transmission gear through the second transmission chain;
the control device is arranged on the horizontal partition board and comprises a control main board, a storage battery and a distance inductor, wherein the distance inductor is arranged in the middle of the inner side of the rear side face of the rectangular shell.
2. The linear shoulder stone laying machine according to claim 1, wherein the upper end face of the rectangular housing is hinged with a flip.
3. The linear type road shoulder stone laying machine according to claim 1, wherein the storage battery is a lithium battery with light weight and high power storage capacity, and the power supply end of the storage battery is respectively connected with the control main board, the first motor, the second motor, the mud pump and the hydraulic oil pump.
4. The linear type road shoulder stone laying machine according to claim 1, wherein the output control end of the control main board is respectively connected with a first motor, a second motor, a mud pump and a hydraulic oil pump in a control mode.
5. The linear shoulder stone laying machine according to claim 1, wherein the inner clamping surfaces of the clamping plates adjacent to the vertical portion of the right-angled clamping plate are each provided with a rubber pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283942.3A CN108487014B (en) | 2018-04-02 | 2018-04-02 | Linear type road shoulder stone laying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283942.3A CN108487014B (en) | 2018-04-02 | 2018-04-02 | Linear type road shoulder stone laying machine |
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| Publication Number | Publication Date |
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| CN108487014A CN108487014A (en) | 2018-09-04 |
| CN108487014B true CN108487014B (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810283942.3A Active CN108487014B (en) | 2018-04-02 | 2018-04-02 | Linear type road shoulder stone laying machine |
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| CN (1) | CN108487014B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109235211A (en) * | 2018-11-05 | 2019-01-18 | 安徽企路石工程技术开发有限公司 | Road and bridge road shoulder stone paving system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2593201A1 (en) * | 1986-01-20 | 1987-07-24 | Acodim Sarl | Kerbstone-laying machine |
| EP2312055A1 (en) * | 2009-10-09 | 2011-04-20 | Willem Hendrik Aantjes | Method and device for placing of kerb stones |
| CN102877400A (en) * | 2012-11-06 | 2013-01-16 | 郭月胜 | Curb stone installing machine |
| CN105369720A (en) * | 2015-12-09 | 2016-03-02 | 华北理工大学 | Kerbstone paving vehicle-mounted mechanical arm |
| CN106149534A (en) * | 2016-08-26 | 2016-11-23 | 南通威而多专用汽车制造有限公司 | Wheel self-balancing type kerbstone paver |
| CN107386074A (en) * | 2017-09-20 | 2017-11-24 | 卢晓峰 | A kind of quick placement vehicle of curb stone |
-
2018
- 2018-04-02 CN CN201810283942.3A patent/CN108487014B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2593201A1 (en) * | 1986-01-20 | 1987-07-24 | Acodim Sarl | Kerbstone-laying machine |
| EP2312055A1 (en) * | 2009-10-09 | 2011-04-20 | Willem Hendrik Aantjes | Method and device for placing of kerb stones |
| CN102877400A (en) * | 2012-11-06 | 2013-01-16 | 郭月胜 | Curb stone installing machine |
| CN105369720A (en) * | 2015-12-09 | 2016-03-02 | 华北理工大学 | Kerbstone paving vehicle-mounted mechanical arm |
| CN106149534A (en) * | 2016-08-26 | 2016-11-23 | 南通威而多专用汽车制造有限公司 | Wheel self-balancing type kerbstone paver |
| CN107386074A (en) * | 2017-09-20 | 2017-11-24 | 卢晓峰 | A kind of quick placement vehicle of curb stone |
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| CN108487014A (en) | 2018-09-04 |
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