CN108824310A - It is a kind of for cleaning the device of chinampa - Google Patents
It is a kind of for cleaning the device of chinampa Download PDFInfo
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- CN108824310A CN108824310A CN201810827984.9A CN201810827984A CN108824310A CN 108824310 A CN108824310 A CN 108824310A CN 201810827984 A CN201810827984 A CN 201810827984A CN 108824310 A CN108824310 A CN 108824310A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 29
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 69
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims 5
- 238000010992 reflux Methods 0.000 claims 3
- 239000002245 particle Substances 0.000 abstract description 14
- 241000347389 Serranus cabrilla Species 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 description 7
- 241000353135 Psenopsis anomala Species 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000010903 husk Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
- E01H1/0827—Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
- E01H1/0836—Apparatus dislodging all of the dirt by suction ; Suction nozzles
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Catching Or Destruction (AREA)
Abstract
本发明公开了一种用于清洁人造草坪的装置，通过前梳草器对人造草坪中的小型垃圾与草丝分离；通过第二直流电机工作带动叶轮旋转，使得垃圾通过吸入口、第一通道后进入第二通道；利用第一直流电机带动风叶旋转产生气流，对由第二通道中的垃圾进行一次分离，分离出较轻垃圾进入第一垃圾储存箱；剩余垃圾进行二次分离，垃圾中的大部分橡胶颗粒直接通过第一筛网和第二筛网进入释放口；进入释放口的橡胶颗粒等回到草坪并由人工推动车体带动后梳草器梳理均匀。解决了现有技术中采用人工方式对人造草坪进行清理费时费力，且不适用于大面积人造草坪清理的问题。本发明可以提高人造草坪垃圾清理效率，适用于大面积人造草坪清理。
The invention discloses a device for cleaning artificial turf, which separates small garbage and grass silk in the artificial turf through a front brusher; drives the impeller to rotate through the second DC motor, so that the garbage passes through the suction port and the first channel Then enter the second channel; use the first DC motor to drive the fan blades to rotate to generate airflow, separate the garbage in the second channel once, and separate the lighter garbage into the first garbage storage box; the remaining garbage is separated twice, and the garbage Most of the rubber particles in the machine enter the release port directly through the first screen and the second screen; the rubber particles that enter the release port return to the lawn and are manually pushed by the car body to drive the rear grass comber to comb evenly. The method solves the problem in the prior art that it takes time and effort to clean artificial turf manually and is not suitable for cleaning large-area artificial turf. The invention can improve the garbage cleaning efficiency of artificial turf, and is suitable for cleaning large-area artificial turf.
Description
技术领域technical field
本发明属于机械技术领域，尤其涉及一种用于清洁人造草坪的装置。The invention belongs to the technical field of machinery, and in particular relates to a device for cleaning artificial turf.
背景技术Background technique
随着社会的不断发展，人们生活水平的日益提高，人们使用人造草坪的频率以及场所也越来越多，但是在使用人造草坪的同时，也会出现草丝倒伏、粘结以及草丝之间夹杂难以清理的瓜子壳、碎纸屑之类的小型垃圾而致使部分草坪失去功能等问题。With the continuous development of society and the improvement of people's living standards, the frequency and places where people use artificial turf are also increasing. Part of the lawn loses its function due to the inclusion of small garbage such as melon seed shells and shredded paper scraps that are difficult to clean.
瓜子壳、碎纸屑之类的小型垃圾，有着自己独特的特点：体积小、质量轻、大部分呈扁平状，因此极易夹杂在草丝之中，而且清理过程极其麻烦，唯靠人工捡拾才能清理干净，该清理方式费时费力，不适宜于大面积草坪清理。Small garbage such as melon seed shells and shredded paper scraps have their own unique characteristics: small size, light weight, and most of them are flat, so they are easily mixed in the grass, and the cleaning process is extremely troublesome, and they can only be picked up manually Only then can it be cleaned up. This cleaning method is time-consuming and laborious, and is not suitable for large-scale lawn cleaning.
发明内容Contents of the invention
本发明的目的在于提供一种用于清洁人造草坪的装置，解决了现有技术中采用人工方式对人造草坪进行清理费时费力，且不适用于大面积人造草坪清理的问题。本发明可以提高人造草坪垃圾清理效率，适用于大面积人造草坪清理。The object of the present invention is to provide a device for cleaning artificial turf, which solves the problems in the prior art that manual cleaning of artificial turf is time-consuming and laborious, and is not suitable for cleaning large-area artificial turf. The invention can improve the garbage cleaning efficiency of artificial turf, and is suitable for cleaning large-area artificial turf.
为达到上述目的，本发明采用如下技术方案：To achieve the above object, the present invention adopts the following technical solutions:
本发明提供了一种用于清洁人造草坪的装置，包括车体，车体上设有前梳草器、吸入装置、分离装置、储存装置以及后梳草器；The invention provides a device for cleaning artificial turf, which includes a car body, on which a front comber, a suction device, a separation device, a storage device and a rear comber are arranged;
前梳草器设置在车体的底部前端，后梳草器设置在车体的底部后端；The front comber is arranged at the bottom front end of the car body, and the rear comber is arranged at the bottom rear end of the car body;
吸入装置包括第二直流电机和叶轮；叶轮连接有第一通道，第一通道的端部设有吸入口；叶轮还连接有第二通道；第二直流电机能够带动叶轮旋转，当叶轮旋转时，叶轮能够通过第一通道吸入人造草坪上的垃圾，使得垃圾进入第二通道；The suction device includes a second DC motor and an impeller; the impeller is connected with a first channel, and the end of the first channel is provided with a suction port; the impeller is also connected with a second channel; the second DC motor can drive the impeller to rotate, and when the impeller rotates, The impeller can suck the garbage on the artificial turf through the first channel, so that the garbage enters the second channel;
储存装置包括第一垃圾储物箱和第二垃圾储物箱；The storage device includes a first garbage storage box and a second garbage storage box;
分离装置包括第一直流电机和风叶；风叶连接有第三通道；第二通道和第三通道连通至第四通道，第四通道与第一垃圾储物箱连通；第一直流电机能够带动风叶旋转，当风叶旋转时，风叶能够将第二通道的轻型垃圾通过第四通道分离至第一垃圾储物箱中；The separation device includes a first DC motor and fan blades; the fan blades are connected with a third channel; the second channel and the third channel are connected to the fourth channel, and the fourth channel is connected with the first garbage storage box; the first DC motor can drive the wind The blade rotates, and when the fan blade rotates, the fan blade can separate the light garbage in the second channel into the first garbage storage box through the fourth channel;
第二通道和第三通道连接处的底部还连接有竖直设置的第五通道，第五通道的顶部设有第一筛网，第五通道的中部设有第二筛网，车体开设有释放口，第五通道的底部与释放口连通；第五通道的侧部与第二垃圾储物箱连接。The bottom of the junction of the second passage and the third passage is also connected with a vertically arranged fifth passage, the top of the fifth passage is provided with a first screen, the middle part of the fifth passage is provided with a second screen, and the car body is provided with a The release port, the bottom of the fifth channel communicates with the release port; the side of the fifth channel is connected with the second garbage storage box.
更进一步地，本发明的特点还在于：Furthermore, the present invention is characterized in that:
第三通道的底部开设有回流口，回流口通过第六通道连接至第二筛网的上方。A return port is opened at the bottom of the third channel, and the return port is connected to the upper part of the second screen through the sixth channel.
回流口上设置有挡板。A baffle is arranged on the return flow port.
车体的底部设有万向轮。The bottom of the car body is provided with universal wheels.
车体上设有手把。The car body is provided with a handle.
前梳草器、后梳草器、第一垃圾储物箱、第二垃圾储物箱以及手把均采用PTFE材料。The front comb, the rear comb, the first waste storage box, the second waste storage box and the handle are all made of PTFE material.
还包括蓄电池，蓄电池用于给第一直流电机和第二直流电机供电。It also includes a storage battery for powering the first DC motor and the second DC motor.
车体的长度为100cm，宽度为60cm，高度为50cm。The length of car body is 100cm, and width is 60cm, and height is 50cm.
与现有技术相比，本发明具有以下有益的技术效果：Compared with the prior art, the present invention has the following beneficial technical effects:
本发明提供的一种用于清洁人造草坪的装置，通过前梳草器对人造草坪中的小型垃圾与草丝分离；通过第二直流电机工作带动叶轮旋转，使得吸入装置内部产生瞬时真空，和外界大气压形成负压差，在此压差的作用下，杂物依次通过吸入口、第一通道后进入第二通道；利用瓜子皮等和橡胶颗粒重量的不同，第一直流电机带动风叶旋转产生气流，对由第二通道中的垃圾进行一次分离，分离出较轻垃圾进入第一垃圾储存箱；剩余垃圾进行二次分离，垃圾中的大部分橡胶颗粒直接通过第一筛网和第二筛网进入释放口；进入释放口的橡胶颗粒等回到草坪并由人工推动车体带动后梳草器梳理均匀。本发明采用负压吸入垃圾时不会对草丝产生任何伤害且吸入效率高；采用气流对轻型垃圾和重型垃圾进行分离，并利用第一筛网和第二筛网，高效分离垃圾的同时还能使草坪原有橡胶颗粒最终释放进草坪；再者，本发明采用前后梳理装置，能使夹杂在草丝缝隙的小型垃圾与草丝分离，也能将释放入草坪的橡胶颗粒梳理均匀，更能使倒伏、粘结的草丝恢复功能。同时，本发明采用直流电机，有效避免了噪音大，能耗高的问题。本发明结构简单、设计合理，操作方便，可适用于大面积人造草坪，节省了大量人力物力。本发明能够提高人造草坪垃圾清理效率，积极响应国家“中国制造2025”计划。The invention provides a device for cleaning artificial turf, which separates the small garbage in the artificial turf from the grass through the front brush; drives the impeller to rotate through the second DC motor, so that a momentary vacuum is generated inside the suction device, and The external atmospheric pressure forms a negative pressure difference. Under the action of this pressure difference, the sundries pass through the suction port, the first channel and then enter the second channel; using the difference in weight of melon seeds and rubber particles, the first DC motor drives the fan blades to rotate Air flow is generated to separate the garbage in the second channel once, and the lighter garbage is separated into the first garbage storage box; the remaining garbage is separated for the second time, and most of the rubber particles in the garbage directly pass through the first screen and the second screen. The sieve enters the release port; the rubber particles entering the release port return to the lawn and are manually pushed by the car body to comb the grass evenly. The invention adopts negative pressure to inhale garbage without causing any damage to the grass and has high inhalation efficiency; the airflow is used to separate light garbage from heavy garbage, and the first screen and the second screen are used to efficiently separate garbage and at the same time The original rubber particles of the lawn can be finally released into the lawn; moreover, the present invention adopts a front and rear combing device, which can separate the small garbage mixed in the gaps between the grass silk and the grass silk, and can also comb the rubber particles released into the lawn evenly, making it more efficient. It can restore the function of the lodging and bonded grass silk. At the same time, the present invention adopts a DC motor, which effectively avoids the problems of high noise and high energy consumption. The invention has the advantages of simple structure, reasonable design and convenient operation, which can be applied to large-area artificial turf and saves a lot of manpower and material resources. The invention can improve the garbage cleaning efficiency of the artificial turf, and actively responds to the national "Made in China 2025" plan.
进一步地，本发明的小部分橡胶颗粒和体积较大垃圾混合物由回流口通过第六通道进入第二筛网进行分离，分离出的垃圾进入第二垃圾储存箱，分离出来的橡胶颗粒等可同样进入释放口，进入释放口的橡胶颗粒等回到草坪并由人工推动车体带动后梳草器梳理均匀。Further, a small part of the rubber particles of the present invention and the larger garbage mixture enter the second screen through the sixth channel through the return port for separation, and the separated garbage enters the second garbage storage tank, and the separated rubber particles, etc. After entering the release port, the rubber particles entering the release port will return to the lawn and be combed evenly by the rear mower driven by the manual push of the car body.
进一步地，本发明采用蓄电池，其转换效率高，技术成熟，使用寿命长，在阴雨天里也适用。Furthermore, the present invention adopts a storage battery, which has high conversion efficiency, mature technology and long service life, and is also applicable in rainy days.
进一步地，本发明的车体设有万向轮，使用时行进转向灵活。Further, the vehicle body of the present invention is provided with universal wheels, and the steering is flexible during use.
附图说明Description of drawings
图1为本发明提供的用于清洁人造草坪的装置的主视结构示意图；Fig. 1 is the front structural schematic diagram of the device for cleaning artificial turf provided by the present invention;
图2为本发明提供的用于清洁人造草坪的装置的侧视结构示意图；Fig. 2 is the side view structure schematic diagram of the device for cleaning artificial turf provided by the present invention;
图3为本发明提供的用于清洁人造草坪的装置的俯视结构示意图；Fig. 3 is the top structural schematic diagram of the device for cleaning artificial turf provided by the present invention;
图中：1、手把；2、车体；3、前梳草器；4、风叶；5、第一直流电机；6、第二垃圾储物箱；7、第一垃圾储物箱；8、后梳草器；9、第二直流电机；10、万向轮；11、挡板；12、回流口；13、释放口；14、第一筛网；15、第二筛网；16、叶轮；17、吸入口。In the figure: 1. Handle; 2. Car body; 3. Front brusher; 4. Wind blade; 5. First DC motor; 6. Second garbage storage box; 7. First garbage storage box; 8. Rear comber; 9. Second DC motor; 10. Universal wheel; 11. Baffle; 12. Return port; 13. Release port; 14. First screen; 15. Second screen; 16 , impeller; 17, suction port.
具体实施方式Detailed ways
下面结合附图对本发明做进一步详细描述：The present invention is described in further detail below in conjunction with accompanying drawing:
参见图1，本发明提供了一种用于清洁人造草坪的装置，包括车体2，车体2上设有前梳草器3、吸入装置、分离装置、储存装置以及后梳草器8；Referring to Fig. 1, the present invention provides a kind of device that is used for cleaning artificial turf, comprises car body 2, and car body 2 is provided with front brusher 3, suction device, separating device, storage device and rear grasser 8;
前梳草器3设置在车体2的底部前端，后梳草器8设置在车体2的底部后端；The front comber 3 is arranged at the bottom front end of the car body 2, and the rear comber 8 is arranged at the bottom rear end of the car body 2;
吸入装置包括第二直流电机9和叶轮16；叶轮16连接有第一通道，第一通道的端部设有吸入口17；叶轮16还连接有第二通道；第二直流电机9能够带动叶轮16旋转，当叶轮16旋转时，叶轮16能够通过第一通道吸入人造草坪上的垃圾，使得垃圾进入第二通道；The suction device comprises a second DC motor 9 and an impeller 16; the impeller 16 is connected with a first passage, and the end of the first passage is provided with a suction port 17; the impeller 16 is also connected with a second passage; the second DC motor 9 can drive the impeller 16 Rotate, when the impeller 16 rotates, the impeller 16 can suck the garbage on the artificial turf through the first channel, so that the garbage enters the second channel;
储存装置包括第一垃圾储物箱7和第二垃圾储物箱6；第一垃圾储物箱7用于存储较轻垃圾，第二垃圾储物箱6用于存储较重垃圾。The storage device includes a first garbage storage box 7 and a second garbage storage box 6; the first garbage storage box 7 is used for storing lighter garbage, and the second garbage storage box 6 is used for storing heavier garbage.
分离装置包括第一直流电机5和风叶4；风叶4连接有第三通道；第二通道和第三通道连通至第四通道，第四通道与第一垃圾储物箱7连通；第一直流电机5能够带动风叶4旋转，当风叶4旋转时，风叶4能够将第二通道的轻型垃圾通过第四通道分离至第一垃圾储物箱7中；The separation device comprises a first direct current motor 5 and fan blades 4; fan blades 4 are connected with a third passage; the second passage and the third passage are communicated with the fourth passage, and the fourth passage is communicated with the first garbage storage box 7; the first direct current The motor 5 can drive the fan blade 4 to rotate, and when the fan blade 4 rotates, the fan blade 4 can separate the light garbage in the second channel into the first garbage storage box 7 through the fourth channel;
第二通道和第三通道连接处的底部还连接有竖直设置的第五通道，第五通道的顶部设有第一筛网14，第五通道的中部设有第二筛网15，第一筛网14和第二筛网15随车体2震动，车体2开设有释放口13，第五通道的底部与释放口13连通；第五通道的侧部与第二垃圾储物箱6连接。The bottom of the second passage and the third passage junction is also connected with the fifth passage vertically arranged, the top of the fifth passage is provided with the first screen cloth 14, the middle part of the fifth passage is provided with the second screen cloth 15, the first The screen 14 and the second screen 15 vibrate with the vehicle body 2, and the vehicle body 2 is provided with a release port 13, the bottom of the fifth channel communicates with the release port 13; the side of the fifth channel is connected with the second garbage storage box 6 .
优选地，本发明第三通道的底部开设有回流口12，回流口12上设置有挡板11，回流口12通过第六通道连接至第二筛网15的上方。Preferably, the bottom of the third channel of the present invention is provided with a return port 12, and the return port 12 is provided with a baffle plate 11, and the return port 12 is connected to the top of the second screen 15 through the sixth channel.
参见图1，本发明的车体2的底部设有万向轮10。车体2上设有手把1。Referring to FIG. 1 , universal wheels 10 are provided at the bottom of the vehicle body 2 of the present invention. The car body 2 is provided with a handle 1 .
优选地，本发明还包括蓄电池，蓄电池用于给第一直流电机5和第二直流电机9供电。Preferably, the present invention also includes a storage battery, which is used to supply power to the first DC motor 5 and the second DC motor 9 .
优选地，前梳草器3、后梳草器8、第一垃圾储物箱7、第二垃圾储物箱6以及手把1均采用PTFE材料。Preferably, the front comber 3, the rear comber 8, the first garbage storage box 7, the second garbage storage box 6 and the handle 1 are all made of PTFE material.
优选地，本发明车体2的长度为100cm，宽度为60cm，高度为50cm。Preferably, the vehicle body 2 of the present invention has a length of 100 cm, a width of 60 cm, and a height of 50 cm.
本发明的工作过程如下：当处于工作状态时，工作员推动车体2运动，前梳草器3随车体2的推动深入草丝之间，梳理倒伏、粘结的草丝并使夹杂在草丝缝隙中的小型垃圾与草丝分离。同时蓄电池提供电能，第二直流电机9工作带动叶轮16旋转，使得吸入装置内部产生瞬时真空，和外界大气压形成负压差，在此压差的作用下，杂物依次通过吸入口17、第一通道后进入第二通道。利用瓜子皮等和橡胶颗粒重量的不同，第一直流电机5带动风叶4旋转产生气流，对由第二通道中的垃圾进行一次分离，分离出较轻垃圾(如瓜子壳等)进入第一垃圾储存箱。剩余垃圾进行二次分离，垃圾中的大部分橡胶颗粒直接通过第一筛网14和第二筛网15进入释放口13；小部分橡胶颗粒和体积较大垃圾混合物由回流口12通过第六通道进入第二筛网15进行分离，分离出的垃圾进入第二垃圾储存箱，分离出来的橡胶颗粒等可同样进入释放口13。进入释放口13的橡胶颗粒等回到草坪并由人工推动车体2带动后梳草器8梳理均匀。The working process of the present invention is as follows: when in the working state, the worker promotes the movement of the car body 2, and the front comber 3 goes deep between the grass silks with the promotion of the car body 2, combs the lodging and bonded grass silks and makes the grass silks mixed in The small garbage in the grass gap is separated from the grass. At the same time, the battery provides electric energy, and the second DC motor 9 works to drive the impeller 16 to rotate, so that an instantaneous vacuum is generated inside the suction device, and a negative pressure difference is formed with the external atmospheric pressure. Enter the second channel after the channel. Utilize the difference of the weight of melon seed husk etc. and rubber particle, the first direct-current motor 5 drives fan blade 4 to rotate to generate airflow, carries out a separation to the rubbish in the second channel, separates lighter rubbish (such as melon seed husk etc.) into the first Garbage storage bins. Secondary separation of the remaining garbage, most of the rubber particles in the garbage directly enter the release port 13 through the first screen 14 and the second screen 15; a small part of the rubber particles and the larger garbage mixture pass through the return port 12 through the sixth channel Enter the second screen cloth 15 for separation, the separated garbage enters the second garbage storage box, and the separated rubber particles and the like can also enter the release port 13 . The rubber granules etc. that enter discharge port 13 get back to the lawn and are driven by the manual promotion car body 2 to comb evenly with the rear comber 8.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827984.9A CN108824310A (en) | 2018-07-25 | 2018-07-25 | It is a kind of for cleaning the device of chinampa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827984.9A CN108824310A (en) | 2018-07-25 | 2018-07-25 | It is a kind of for cleaning the device of chinampa |
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| Publication Number | Publication Date |
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| CN108824310A true CN108824310A (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810827984.9A Withdrawn CN108824310A (en) | 2018-07-25 | 2018-07-25 | It is a kind of for cleaning the device of chinampa |
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| CN (1) | CN108824310A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109392618A (en) * | 2018-12-20 | 2019-03-01 | 马俊东 | Robot is intelligently cleared up on a kind of playground rubber lawn |
| CN110904906A (en) * | 2019-10-31 | 2020-03-24 | 杭州宝力体育设施工程有限公司 | Artificial turf carding machine with clean function of washing |
| CN112411328A (en) * | 2020-11-19 | 2021-02-26 | 王梦梦 | Artificial turf maintenance device capable of uniformly distributing rubber particles |
-
2018
- 2018-07-25 CN CN201810827984.9A patent/CN108824310A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109392618A (en) * | 2018-12-20 | 2019-03-01 | 马俊东 | Robot is intelligently cleared up on a kind of playground rubber lawn |
| CN109392618B (en) * | 2018-12-20 | 2020-12-15 | 马俊东 | Playground rubber lawn intelligent cleaning robot |
| CN110904906A (en) * | 2019-10-31 | 2020-03-24 | 杭州宝力体育设施工程有限公司 | Artificial turf carding machine with clean function of washing |
| CN112411328A (en) * | 2020-11-19 | 2021-02-26 | 王梦梦 | Artificial turf maintenance device capable of uniformly distributing rubber particles |
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