CN109295878B - Automatic highway obstacle winding and unwinding devices - Google Patents
Automatic highway obstacle winding and unwinding devices Download PDFInfo
- Publication number
- CN109295878B CN109295878B CN201811393642.7A CN201811393642A CN109295878B CN 109295878 B CN109295878 B CN 109295878B CN 201811393642 A CN201811393642 A CN 201811393642A CN 109295878 B CN109295878 B CN 109295878B
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- Prior art keywords
- pipe
- inflation
- hose
- shell
- inflatable
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Links
- 238000004804 winding Methods 0.000 title claims description 3
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000000428 dust Substances 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 8
- 241001417527 Pempheridae Species 0.000 description 4
- 238000010408 sweeping Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/70—Storing, transporting, placing or retrieving portable devices
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to an automatic highway barrier retraction device, which comprises a grabbing mechanism, wherein the grabbing mechanism comprises a shell, one side of the lower part of the shell is provided with an inflatable hose, the front end of the inflatable hose is provided with an inflatable ball, and an air outlet one-way valve is arranged on the inflatable ball; the outer peripheral face of casing is equipped with soon and transfers the mechanism, soon transfers the mechanism and is connected with flexible regulation pipe, and the outer peripheral face cover of flexible regulation pipe is equipped with the stand pipe, and the rear end of stand pipe is equipped with holds the pipe, and the front end both sides of flexible regulation pipe all are equipped with the locating tube, installs the installation axle between the locating tube, and the outer peripheral face cover of installation axle is equipped with soon and transfers the pipe. According to the invention, the inflatable hose is more firmly tensioned on the inner top of the road obstacle marking cylinder through the inflatable ball, and an operator can conveniently recover the road obstacle marking cylinder through the retraction device, so that the safety is extremely high.
Description
Technical Field
The invention relates to a retraction device, in particular to an automatic retraction device for highway barriers.
Background
The road sweeper is novel efficient sweeping equipment integrating road sweeping, garbage recycling and transportation. The road sweeper is characterized in that a special automobile chassis is modified into a road sweeping vehicle type, a secondary engine is additionally arranged on the automobile except for a chassis engine, and four sweeping brushes are driven by a hydraulic motor to work and are provided with a fan, a dustbin, a water tank and other various matched equipment. The new vehicle type can finish the work of cleaning the ground, cleaning the road curb, sprinkling water on the ground after cleaning and the like at one time, and is suitable for cleaning operations of various climates and different dry road surfaces. The pure suction road sweeper adopts the principle of negative pressure pure suction, consists of a dust collection system, a primary dust collection box, a secondary dust collection box, a dust recovery system, a hydraulic system, an electric control system, a traveling system and the like, has the advantages of wide dust collection range, high suction rate, no secondary dust emission at a suction port, no dust discharge at an air outlet, high working efficiency and the like, and is a preferred product for sanitation cleaning and material recovery. The method is suitable for industrial and mining enterprises with multiple dust, high concentration and high density, which are easy to generate dust pollution; quick cleaning and cleaning of urban overhead, expressways and bridge tunnels; and cleaning urban arterial roads, high-grade highways and expressways. But the existing road sweeper is inconvenient to grasp the road obstacle marking cylinder, the quick recovery operation of the road obstacle marking cylinder is inconvenient, and particularly, an operator manually and directly takes the road obstacle marking cylinder on a highway, and the risk coefficient of the mode is extremely high.
Disclosure of Invention
The invention aims at overcoming the defects and shortcomings of the prior art, and provides the automatic highway obstacle retraction device which enables an inflatable hose to be firmly tensioned on the inner top of a highway obstacle marking cylinder through an inflatable ball, and an operator can conveniently recycle the highway obstacle marking cylinder through the retraction device, so that the safety is extremely high.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the automatic highway obstacle collecting and releasing device comprises a grabbing mechanism, wherein the grabbing mechanism comprises a shell, a first inflation hose is arranged on one side of the lower part of the shell, a second inflation hose is arranged on the other side of the lower part of the shell, a first inflation ball is arranged at the front end of the first inflation hose, and a first air outlet one-way valve is arranged on the first inflation ball; the front end of the second inflatable hose is provided with a second inflatable ball, and a second air outlet one-way valve is arranged on the second inflatable ball; the outer peripheral surface of the shell is provided with a rotating and adjusting mechanism, the rotating and adjusting mechanism is connected with a telescopic adjusting pipe, the outer peripheral surface of the telescopic adjusting pipe is sleeved with a guide pipe, the rear end of the guide pipe is provided with a holding pipe, both sides of the front end of the telescopic adjusting pipe are provided with positioning pipes, an installation shaft is installed between the positioning pipes, the outer peripheral surface of the installation shaft is sleeved with a rotating and adjusting pipe, the rotating and adjusting mechanism comprises a sleeve pipe, the sleeve pipe is sleeved on the outer peripheral surface of the shell, and the rotating and adjusting pipe is installed at the outer side position of the sleeve pipe; the upper part of the shell is connected with an inflation tube, one end of the inflation tube is connected with the upper part of the shell, the other end of the inflation tube is provided with an inflation pump, and the inflation pump is arranged on one side of the holding tube; the upper part of the shell is connected with a pull rope, one end of the pull rope is connected with the upper part of the shell, and the other end of the pull rope is a free end; the lower part of the shell is connected with a water filling pipe, one end of the water filling pipe is connected with the lower part of the shell, and the other end of the water filling pipe is provided with a water filling pump; the charge pump is mounted on the other side of the grip tube.
Further, the upper portion of casing cover is equipped with the sleeve pipe, and the outside position of sleeve pipe is equipped with the side bearer, and the outside both sides of side bearer all are equipped with the location section of thick bamboo, overlap between the location section of thick bamboo and be equipped with the locating shaft, and the outer peripheral face cover of locating shaft is equipped with the leading wheel, and the stay cord walks around the outer peripheral face of leading wheel.
Further, a fixing ring is arranged at the end part of the pull rope and is fixed at the upper part of the shell.
Further, the outer end of the pull rope is connected with an extension line, and the outer end of the extension line is provided with a pull ring.
Further, a transverse air charging pipe is arranged between the middle parts of the first air charging hose and the second air charging hose, one end of the transverse air charging pipe is communicated with the first air charging hose, the other end of the transverse air charging pipe is communicated with the second air charging hose, and an air charging bag is arranged at the middle part of the transverse air charging pipe.
Further, the inflatable bag is in an ellipsoidal shape.
Further, the first air inflation hose and the second air inflation hose are arc-shaped.
Further, the outer end of the telescopic adjusting pipe is connected with an extension pipe, and a connecting joint is arranged between the extension pipe and the outer end of the telescopic adjusting pipe.
After the structure is adopted, the invention has the beneficial effects that: the operator can sit on the road engineering vehicle, the operator can manually control the telescopic adjusting pipe to move forwards along the guide pipe, so that the shell can be conveniently pushed forwards, the first inflatable hose and the second inflatable hose which are not inflated are in a downward straight line state, the operator can manually stretch the first inflatable hose and the second inflatable hose into the top of the road barrier marking cylinder, the first inflatable ball and the second inflatable ball stretch into the top of the road barrier marking cylinder, the operator can manually pull the pull rope, the upper part of the shell can be pulled through the pull rope, and the middle part of the shell can be conveniently adjusted by rotating the rotating adjusting pipe around the installation shaft, so that the inclination of the shell can be conveniently adjusted; therefore, the first inflatable hose and the second inflatable hose can be flexibly moved and adjusted, and the first inflatable ball and the second inflatable ball can flexibly extend into the top of the road obstacle marking cylinder; the inflation pump inflates the shell through the inflation pipe, the first inflation hose, the second inflation hose, the first inflation ball and the second inflation ball can be inflated through the shell, the inner top of the road obstacle marking cylinder can be tensioned through the first inflation hose and the second inflation hose, the first inflation hose and the second inflation hose can be tensioned on the inner top of the road obstacle marking cylinder more firmly through the first inflation ball and the second inflation ball, an operator can conveniently recycle the road obstacle marking cylinder through the retraction device, and the safety is extremely high; the first air-out check valve and the second air-out check valve are used for deflating the first air-filled hose, the second air-filled hose, the first air-filled ball and the second air-filled ball, so that an operator can conveniently recover the subsequent road obstacle marking cylinder.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the rotation adjusting mechanism according to the present invention.
Fig. 3 is a schematic structural view of the grabbing mechanism according to the present invention.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the automatic highway barrier retraction device of the present invention comprises a gripping mechanism, wherein the gripping mechanism comprises a housing 11, a first inflation hose 12 is arranged on one side of the lower part of the housing 11, a second inflation hose 13 is arranged on the other side of the lower part of the housing 11, a first inflation ball 14 is arranged at the front end of the first inflation hose 12, and a first air outlet check valve 15 is arranged on the first inflation ball 14; the front end of the second inflatable hose 13 is provided with a second inflatable ball 16, and a second air outlet one-way valve 17 is arranged on the second inflatable ball 16; the outer peripheral surface of the shell 11 is provided with a rotating and adjusting mechanism, the rotating and adjusting mechanism is connected with a telescopic adjusting pipe 21, the outer peripheral surface of the telescopic adjusting pipe 21 is sleeved with a guide pipe 22, the rear end of the guide pipe 22 is provided with a holding pipe 26, two sides of the front end of the telescopic adjusting pipe 21 are provided with positioning pipes 23, a mounting shaft 24 is arranged between the positioning pipes 23, the outer peripheral surface of the mounting shaft 24 is sleeved with a rotating and adjusting pipe 25, the rotating and adjusting mechanism comprises a sleeved pipe 20, the sleeved pipe 20 is sleeved on the outer peripheral surface of the shell 11, and the rotating and adjusting pipe 25 is arranged at the outer side part of the sleeved pipe 20; the upper part of the shell 11 is connected with an inflation tube 31, one end of the inflation tube 31 is connected with the upper part of the shell 11, the other end of the inflation tube 31 is provided with an inflation pump 32, and the inflation pump 32 is arranged on one side of the holding tube 26; the upper part of the shell 11 is connected with a pull rope 38, one end of the pull rope 38 is connected with the upper part of the shell 11, and the other end of the pull rope 38 is a free end; the lower part of the shell 11 is connected with a water filling pipe 29, one end of the water filling pipe 29 is connected with the lower part of the shell 11, and the other end of the water filling pipe 29 is provided with a water filling pump 30; a charge pump 30 is mounted on the other side of the grip tube 26.
According to the automatic highway barrier retraction device, an operator can sit on a road engineering vehicle, the operator can manually control the telescopic adjusting tube 21 to move forwards along the guide tube 22, so that the shell 11 can be conveniently pushed forwards, the first inflatable hose 12 and the second inflatable hose 13 which are not inflated are in a downward straight line state, the operator can manually extend the first inflatable hose 12 and the second inflatable hose 13 into the top of a highway barrier marking cylinder, the first inflatable balloon 14 and the second inflatable balloon 16 extend into the top of the highway barrier marking cylinder, the operator can manually pull the pull rope 38, the upper part of the shell 11 can be pulled through the pull rope 38, and the middle part of the shell 11 can be rotationally adjusted around the mounting shaft 24 through the rotating adjusting tube 25, so that the inclination of the shell 11 can be conveniently adjusted; thereby the first inflatable hose 12 and the second inflatable hose 13 can be flexibly moved and adjusted, and the first inflatable ball 14 and the second inflatable ball 16 can be flexibly stretched into the top of the road obstacle marking cylinder; the inflator pump 32 inflates the shell 11 through the inflation tube 31, the first inflation hose 12, the second inflation hose 13, the first inflation balloon 14 and the second inflation balloon 16 can be inflated through the shell 11, the inner top of the road obstacle marking cylinder can be tensioned through the first inflation hose 12 and the second inflation hose 13, the first inflation hose 12 and the second inflation hose 13 can be tensioned on the inner top of the road obstacle marking cylinder more firmly through the first inflation balloon 14 and the second inflation balloon 16, and an operator can conveniently recycle the road obstacle marking cylinder through the retraction device, so that the safety is extremely high; the first air-inflating hose 12, the second air-inflating hose 13, the first air-inflating ball 14 and the second air-inflating ball 16 are deflated through the first air-out check valve 15 and the second air-out check valve 17, so that an operator can conveniently recycle the subsequent road obstacle marking cylinder.
The upper part of the shell 11 is sleeved with a sleeve 33, a side frame 34 is arranged at the outer side part of the sleeve 33, positioning cylinders 35 are arranged at two outer sides of the side frame 34, a positioning shaft 36 is sleeved between the positioning cylinders 35, a guide wheel 37 is sleeved on the outer peripheral surface of the positioning shaft 36, and a pull rope 38 bypasses the outer peripheral surface of the guide wheel 37; so the pulling rope 38 can be guided and controlled by the guide wheel 37, and the pulling flexibility of the pulling rope 38 is higher.
Wherein, the end of the pull rope 38 is provided with a fixed ring 39, and the fixed ring 39 is fixed on the upper part of the shell 11; the end of the string 38 can be fixed to the upper portion of the housing 11 by the fixing ring 39.
Wherein, the outer end of the pull rope 38 is connected with an extension line 40, and the outer end of the extension line 40 is provided with a pull ring 41; the outer end of the extension cord 40 can be pulled by the pull tab 41.
A transverse air charging tube 18 is arranged between the middle parts of the first air charging hose 12 and the second air charging hose 13, one end of the transverse air charging tube 18 is communicated with the first air charging hose 12, the other end of the transverse air charging tube 18 is communicated with the second air charging hose 13, and an air charging bag 19 is arranged at the middle part of the transverse air charging tube 18; the inflatable bag 19 is in an ellipsoidal shape; so the first and second air-filled hoses 12 and 13 can be inflated to the transverse air-filled tube 18 and the air-filled bag 19, the strength between the first and second air-filled hoses 12 and 13 is greatly improved by the transverse air-filled tube 18 and the air-filled bag 19, and the road barrier marking cylinder is more stably recovered.
Wherein, the first air charging hose 12 and the second air charging hose 13 are arc-shaped; the arc-shaped first and second air tubes 12 and 13 can more firmly tighten the road obstacle marking cylinder.
Wherein, the outer end of the telescopic adjusting tube 21 is connected with an extension tube 27, and a connecting joint 28 is arranged between the extension tube 27 and the outer end of the telescopic adjusting tube 21; it is convenient to lengthen the telescopic adjusting tube 21.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the invention are therefore intended to be embraced therein.
Claims (6)
1. The utility model provides an automatic winding and unwinding devices of highway obstacle, includes snatchs mechanism, its characterized in that: the grabbing mechanism comprises a shell (11), a first inflation hose (12) is arranged on one side of the lower part of the shell (11), a second inflation hose (13) is arranged on the other side of the lower part of the shell (11), a first inflation ball (14) is arranged at the front end of the first inflation hose (12), and a first air outlet one-way valve (15) is arranged on the first inflation ball (14); the front end of the second inflatable hose (13) is provided with a second inflatable ball (16), and a second air outlet one-way valve (17) is arranged on the second inflatable ball (16);
the outer peripheral surface of the shell (11) is provided with a rotating and adjusting mechanism, the rotating and adjusting mechanism is connected with a telescopic adjusting pipe (21), the outer peripheral surface of the telescopic adjusting pipe (21) is sleeved with a guide pipe (22), the rear end of the guide pipe (22) is provided with a holding pipe (26), two sides of the front end of the telescopic adjusting pipe (21) are provided with positioning pipes (23), an installation shaft (24) is installed between the positioning pipes (23), the outer peripheral surface of the installation shaft (24) is sleeved with a rotating and adjusting pipe (25), the rotating and adjusting mechanism comprises a sleeved pipe (20), the sleeved pipe (20) is sleeved on the outer peripheral surface of the shell (11), and the rotating and adjusting pipe (25) is installed at the outer side position of the sleeved pipe (20);
the upper part of the shell (11) is connected with an inflation tube (31), one end of the inflation tube (31) is connected with the upper part of the shell (11), the other end of the inflation tube (31) is provided with an inflation pump (32), and the inflation pump (32) is arranged on one side of the holding tube (26); the upper part of the shell (11) is connected with a pull rope (38), one end of the pull rope (38) is connected with the upper part of the shell (11), and the other end of the pull rope (38) is a free end;
the lower part of the shell (11) is connected with a water filling pipe (29), one end of the water filling pipe (29) is connected with the lower part of the shell (11), and the other end of the water filling pipe (29) is provided with a water filling pump (30); the charge pump (30) is arranged on the other side of the holding tube (26);
the upper part of the shell (11) is sleeved with a sleeve (33), a side frame (34) is arranged at the outer side part of the sleeve (33), positioning cylinders (35) are arranged at the two outer sides of the side frame (34), positioning shafts (36) are sleeved between the positioning cylinders (35), the outer peripheral surface of each positioning shaft (36) is sleeved with a guide wheel (37), and a pull rope (38) bypasses the outer peripheral surface of each guide wheel (37);
a transverse air charging pipe (18) is arranged between the middle parts of the first air charging hose (12) and the second air charging hose (13), one end of the transverse air charging pipe (18) is communicated with the first air charging hose (12), the other end of the transverse air charging pipe (18) is communicated with the second air charging hose (13), and an air charging bag (19) is arranged at the middle part of the transverse air charging pipe (18);
the inflator pump (32) inflates the shell (11) through the inflation tube (31), can inflate hose (12) for first inflation through shell (11), hose (13) for second inflation, first inflation ball (14) and second inflation ball (16), can tighten the interior top of highway barrier marking cylinder through hose (12) for first inflation and hose (13) for second inflation, make hose (12) for first inflation and hose (13) for second inflation more firmly tighten on the interior top of highway barrier marking cylinder through first inflation ball (14) and hose (16) for second inflation.
2. The highway barrier automatic retraction device according to claim 1 wherein: the end of the pull rope (38) is provided with a fixing ring (39), and the fixing ring (39) is fixed on the upper part of the shell (11).
3. The highway barrier automatic retraction device according to claim 1 wherein: the outer end of the pull rope (38) is connected with an extension line (40), and the outer end of the extension line (40) is provided with a pull ring (41).
4. The highway barrier automatic retraction device according to claim 1 wherein: the inflatable bag (19) is in an ellipsoidal shape.
5. The highway barrier automatic retraction device according to claim 1 wherein: the first inflatable hose (12) and the second inflatable hose (13) are arc-shaped.
6. The highway barrier automatic retraction device according to claim 1 wherein: the outer end of the telescopic adjusting pipe (21) is connected with an extension pipe (27), and a connecting joint (28) is arranged between the extension pipe (27) and the outer end of the telescopic adjusting pipe (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811393642.7A CN109295878B (en) | 2018-11-21 | 2018-11-21 | Automatic highway obstacle winding and unwinding devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811393642.7A CN109295878B (en) | 2018-11-21 | 2018-11-21 | Automatic highway obstacle winding and unwinding devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109295878A CN109295878A (en) | 2019-02-01 |
| CN109295878B true CN109295878B (en) | 2024-04-05 |
Family
ID=65144647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811393642.7A Active CN109295878B (en) | 2018-11-21 | 2018-11-21 | Automatic highway obstacle winding and unwinding devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109295878B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6435369B1 (en) * | 1999-05-13 | 2002-08-20 | Farid Poursayadi | Device for placing cones on a roadway surface |
| WO2013068716A1 (en) * | 2011-11-10 | 2013-05-16 | Clebert O'bryan Ricardo Yearwood | Traffic management vehicle |
| CN105672162A (en) * | 2016-04-07 | 2016-06-15 | 扬州江润科技有限公司 | Heavy road cone pick-up and arranging robot |
| CN206553982U (en) * | 2016-04-11 | 2017-10-13 | 江苏永创智能设备有限公司 | A kind of cone automatic grabbing device |
| CN207727464U (en) * | 2017-09-26 | 2018-08-14 | 山东理工大学 | A kind of road cone retracting device of cone automatic deploying and retracting vehicle |
| CN207828876U (en) * | 2018-01-19 | 2018-09-07 | 陆一行 | A kind of intelligent expressway remote control obstacles removing car |
| CN108797423A (en) * | 2018-04-18 | 2018-11-13 | 重庆交通职业学院 | A kind of highway reflective cone draw off gear |
| CN209397531U (en) * | 2018-11-21 | 2019-09-17 | 周翠华 | A kind of highway obstacle automatic retraction device |
-
2018
- 2018-11-21 CN CN201811393642.7A patent/CN109295878B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6435369B1 (en) * | 1999-05-13 | 2002-08-20 | Farid Poursayadi | Device for placing cones on a roadway surface |
| WO2013068716A1 (en) * | 2011-11-10 | 2013-05-16 | Clebert O'bryan Ricardo Yearwood | Traffic management vehicle |
| CN105672162A (en) * | 2016-04-07 | 2016-06-15 | 扬州江润科技有限公司 | Heavy road cone pick-up and arranging robot |
| CN206553982U (en) * | 2016-04-11 | 2017-10-13 | 江苏永创智能设备有限公司 | A kind of cone automatic grabbing device |
| CN207727464U (en) * | 2017-09-26 | 2018-08-14 | 山东理工大学 | A kind of road cone retracting device of cone automatic deploying and retracting vehicle |
| CN207828876U (en) * | 2018-01-19 | 2018-09-07 | 陆一行 | A kind of intelligent expressway remote control obstacles removing car |
| CN108797423A (en) * | 2018-04-18 | 2018-11-13 | 重庆交通职业学院 | A kind of highway reflective cone draw off gear |
| CN209397531U (en) * | 2018-11-21 | 2019-09-17 | 周翠华 | A kind of highway obstacle automatic retraction device |
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| Publication number | Publication date |
|---|---|
| CN109295878A (en) | 2019-02-01 |
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