CN114319742A - Greenhouse snow removing device for agricultural production - Google Patents
Greenhouse snow removing device for agricultural production Download PDFInfo
- Publication number
- CN114319742A CN114319742A CN202111467864.0A CN202111467864A CN114319742A CN 114319742 A CN114319742 A CN 114319742A CN 202111467864 A CN202111467864 A CN 202111467864A CN 114319742 A CN114319742 A CN 114319742A
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- Prior art keywords
- snow
- ring
- agricultural production
- greenhouse
- removing device
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- 238000012271 agricultural production Methods 0.000 title claims abstract description 22
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 13
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 13
- 241001330002 Bambuseae Species 0.000 claims abstract description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 13
- 239000011425 bamboo Substances 0.000 claims abstract description 13
- 230000007306 turnover Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 3
- 235000013311 vegetables Nutrition 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 244000061176 Nicotiana tabacum Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 235000013616 tea Nutrition 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention provides a greenhouse snow removing device for agricultural production, and relates to the field of agricultural production. This greenhouse snow removing device for agricultural production, including the mounting bracket, the quantity of mounting bracket is two, and two mounting brackets are close to each other the one side through two dead lever fixed connection, is provided with the backup pad between two mounting brackets, and the backup pad slides and cup joints the surface at two dead levers, and the right flank fixedly connected with of backup pad gathers a snow section of thick bamboo, and the fixed disk has been cup jointed to the right-hand member of backup pad, and the surface rotation of fixed disk has cup jointed the collar. This big-arch shelter snow removing device for agricultural production through setting up the upset ring gear, getting snow pipe, a snow gathering section of thick bamboo, pinion rack and ring gear, when getting snow pipe and removing the snow range of fighting, the gear meshes with the upset ring gear, drives and gets snow pipe rotation, makes the mouth of getting snow pipe pour inside snow into a snow gathering section of thick bamboo down, reaches and pack into snow in the snow gathering section of thick bamboo in grades, can not cause snow when the snow removing to take place accumulational condition on the big-arch shelter.
Description
Technical Field
The invention relates to the field of agricultural production, in particular to a greenhouse snow removing device for agricultural production.
Background
Agricultural production refers to the production activities of planting crops. Including grain, cotton, oil, hemp, silk, tea, sugar, vegetables, tobacco, fruits, medicines, miscellaneous (referring to other cash crops, green manure crops, feed crops and other crops) and the like, the greenhouse is more and more widely applied in agricultural production along with the development of the society.
The snow on the greenhouse needs to be removed, because the snow falls for too long time and the accumulated snow is too thick, the temperature and the light transmittance in the greenhouse are reduced, and the normal growth of the greenhouse vegetables is influenced, the snow on the greenhouse needs to be removed, the snow is generally pulled down from the roof when the snow is removed, but when the snow is pulled down, the snow can be accumulated on the greenhouse, and the greenhouse film is easily crushed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a greenhouse snow removing device for agricultural production, which solves the problems that snow is generally pulled downwards from a greenhouse top during snow removal, but when the snow is pulled downwards, the snow is accumulated on a greenhouse, and a greenhouse film is easily crushed.
In order to achieve the purpose, the invention is realized by the following technical scheme: a greenhouse snow removing device for agricultural production comprises two mounting frames, wherein the number of the mounting frames is two, one surfaces, close to each other, of the two mounting frames are fixedly connected through two fixing rods, a supporting plate is arranged between the two mounting frames and is sleeved on the outer surfaces of the two fixing rods in a sliding manner, a snow gathering cylinder is fixedly connected to the right side surface of the supporting plate, a fixing disc is fixedly sleeved at the right end of the supporting plate, a mounting ring is sleeved on the outer surface of the fixing disc in a rotating manner, a toothed ring is rotatably inserted into the inner annular surface of the mounting ring and is positioned between the fixing disc and the two fixing rods, a toothed plate is meshed above the toothed ring, the front end and the rear end of the toothed plate are respectively and fixedly connected with the surfaces, close to each other, of the two mounting frames, a plurality of snow taking pipes are arranged on the right side of the mounting ring, a short shaft is fixedly connected to the left side surface of each snow taking pipe, the left end of the short shaft penetrates through the right side surface of the mounting ring in a rotating manner, a gear is fixedly sleeved at one end, positioned on the right side of the mounting ring, of the short shaft, a gear is connected with a gear, the constant head tank has been seted up to the surface of minor axis, and the constant head tank is located the right side of gear, and the right side of collar is provided with the upset ring gear, upset ring gear and backup pad fixed connection, and the right side of upset pinion rack is provided with the breach ring, and the upset ring gear is located between a plurality of gears, and the breach ring is located between a plurality of minor axes.
Gather the upper surface of a snow section of thick bamboo and set up the snow mouth that advances with inside intercommunication, the last fixed surface of a snow section of thick bamboo is connected with and is gathered snow fill, and it is located a plurality of snow pipes of getting to gather snow fill, is provided with the threaded rod between two dead levers, and two mounting brackets rotate respectively and cup joint the both ends at the threaded rod, the positive fixedly connected with motor of the mounting bracket that is located the place ahead, the output of motor and the front end fixed connection of threaded rod, and the backup pad screw thread cup joints the surface at the threaded rod.
Preferably, the top of collar is provided with fixed pipe, the bottom surface fixedly connected with connecting rod of fixed pipe, the lower extreme of connecting rod and the upper end fixed connection of backup pad, and the inside elastic hinge of fixed pipe has the dwang, and the fixed cover of right-hand member of dwang has a plurality of poles of knocking, knocks the pole and is located the top of getting the snow pipe.
Preferably, the back of the upper end of the connecting rod is fixedly connected with a stop lever, and the stop lever is positioned behind the knocking rod.
Preferably, the breach radian of breach ring equals the radian size of upset ring gear, and the both ends of breach ring all set up the chamfer, and breach ring and constant head tank are in the coplanar, and the both sides edge of constant head tank all has the fillet.
Preferably, the number of teeth of the turnover gear ring is equal to that of the teeth of the gear, and the short shafts are respectively and coaxially arranged with the snow taking pipes.
Preferably, a plurality of snow taking pipes are arranged in parallel, and the plurality of snow taking pipes are uniformly distributed in an axial circumferential array of the snow gathering cylinder.
Compared with the prior art, the invention has the following beneficial effects:
1. the greenhouse snow removing device for agricultural production is characterized in that two mounting frames are mounted at two ends of the top of a greenhouse through the arrangement of a turnover toothed ring, a snow taking pipe, a snow gathering cylinder, a toothed plate and the toothed ring, when snow needs to be removed, a motor is started to drive a threaded rod to rotate, a supporting plate is meshed with the threaded rod to move back and forth, the supporting plate drives the mounting ring to move synchronously through a fixed disk, the toothed ring is meshed with the toothed plate to move, the mounting ring rotates relative to the fixed disk, the mounting ring drives the snow taking pipe to rotate around the axis of the snow gathering cylinder when rotating, when the snow taking pipe rotates to the lower side, the snow taking pipe presses a snow layer on the greenhouse downwards to extrude snow into the snow taking pipe, when the snow taking pipe continues to rotate, the internal snow is driven to rotate to the upper side, when the snow taking pipe moves to the range of the snow gathering bucket, a gear is meshed with the turnover toothed ring to drive the snow taking pipe to rotate, the opening of the snow taking pipe downwards pours the internal snow into the snow gathering cylinder, the snow can be loaded into the snow gathering cylinder in several times, and the situation that snow is accumulated on the greenhouse during snow removal can not be caused.
2. This big-arch shelter snow removing device for agricultural production through setting up constant head tank and breach ring, after gear and upset ring gear break away from the meshing, the breach ring inserts in the constant head tank, makes the minor axis can not produce the rotation under the effect of constant head tank and breach ring, guarantees when getting the snow pipe and removing the below, gets the opening direction of snow pipe down.
3. This big-arch shelter snow removing device for agricultural production through setting up connecting rod, fixed pipe, dwang and knocking the pole, gets the snow pipe and rotates to gather snow section of thick bamboo top when contacting with knocking the pole, gets the snow pipe and stirs when rotating and knock the pole and rotate, makes to knock the pole and constantly knock the snow pipe of getting of the top under elasticity articulated effect, will get the snow of snow intraduct and knock off, is convenient for get the snow pipe and get snow once more.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the connection between the snow collecting hopper and the snow collecting barrel according to the present invention;
FIG. 3 is a schematic view of the connection between the fixing plate and the mounting ring according to the present invention;
FIG. 4 is a schematic view of the connection of the rotating lever and the knocking lever according to the present invention;
FIG. 5 is a schematic front view of a portion of the present invention;
FIG. 6 is an enlarged view of the structure at A in FIG. 4 according to the present invention.
The snow collecting device comprises a mounting frame 1, a fixing rod 2, a supporting plate 3, a mounting ring 4, a snow collecting cylinder 5, a fixing disc 6, a turnover toothed ring 7, a toothed ring 8, a toothed plate 9, a snow taking pipe 10, a short shaft 11, a positioning groove 12, a gear 13, a notch ring 14, a snow inlet 15, a snow collecting hopper 16, a threaded rod 17, a motor 18, a fixing pipe 19, a connecting rod 20, a rotating rod 21, a knocking rod 22 and a stop rod 23.
Detailed Description
As shown in fig. 1-6, a greenhouse snow removing device for agricultural production comprises two mounting frames 1, the two mounting frames 1 are provided, the surfaces of the two mounting frames 1, which are close to each other, are fixedly connected through two fixing rods 2, a supporting plate 3 is arranged between the two mounting frames 1, the supporting plate 3 is slidably sleeved on the outer surfaces of the two fixing rods 2, so that the supporting plate 3 cannot incline when sliding, a snow collecting cylinder 5 is fixedly connected to the right side surface of the supporting plate 3, a fixing plate 6 is fixedly sleeved at the right end of the supporting plate 3, a mounting ring 4 is rotatably sleeved on the outer surface of the fixing plate 6, a toothed ring 8 is rotatably inserted into the inner annular surface of the mounting ring 4, the toothed ring 8 is positioned between the fixing plate 6 and the two fixing rods 2, a toothed plate 9 is meshed above the toothed ring 8, the front end and the rear end of the toothed plate 9 are respectively fixedly connected with the surfaces of the two mounting frames 1, and when the toothed ring 8 and the toothed plate 9 move relatively, the mounting ring 4 is driven to rotate.
The right side of collar 4 is provided with a plurality of snow pipes 10 of getting, a plurality of snow pipes 10 parallel arrangement of getting, a plurality of snow pipes 10 of getting are with snow section of thick bamboo 5's axis circumference array evenly distributed, get the left surface fixedly connected with minor axis 11 of snow pipe 10, the right flank that runs through collar 4 is rotated to the left end of minor axis 11, minor axis 11 is located the fixed cover in one end on collar 4 right side and has connect gear 13, constant head tank 12 has been seted up to minor axis 11's surface, constant head tank 12 is located gear 13's right side, collar 4's right side is provided with upset ring gear 7, the number of teeth of upset ring gear 7 equals with the number of teeth of gear 13, a plurality of minor axes 11 respectively with a plurality of snow pipes 10 coaxial settings of getting, after gear 13 and upset ring gear 7 mesh, gear 13 just rotates a week, upset ring gear 7 and 3 fixed connection of backup pad.
The right side of upset pinion rack 9 is provided with breach ring 14, upset ring gear 7 is located between a plurality of gears 13, breach ring 14 is located between a plurality of minor axles 11, the breach radian of breach ring 14 equals the radian size of upset ring gear 7, the both ends of breach ring 14 all set up the chamfer, breach ring 14 is in the coplanar with constant head tank 12, the both sides edge of constant head tank 12 all has the fillet, constant head tank 12 sets up the chamfer with breach ring 14 and is convenient for breach ring 14 to insert in constant head tank 12, inject minor axle 11.
Gather a snow section of thick bamboo 5's upper surface and offer the snow mouth 15 with the entering of inside intercommunication, gather a snow section of thick bamboo 5's last fixed surface and be connected with and gather snow fill 16, it is located a plurality of snow pipes 10 of getting to gather snow fill 16, be provided with threaded rod 17 between two dead levers 2, two mounting bracket 1 rotate respectively and cup joint the both ends at threaded rod 17, the positive fixedly connected with motor 18 of mounting bracket 1 that is located the place ahead, the output of motor 18 and the front end fixed connection of threaded rod 17, 3 screw threads of backup pad cup joint the surface at threaded rod 17.
The top of collar 4 is provided with fixed pipe 19, the bottom surface fixedly connected with connecting rod 20 of fixed pipe 19, the lower extreme of connecting rod 20 and the upper end fixed connection of backup pad 3, the inside elastic hinge of fixed pipe 19 has dwang 21, the fixed cover of right-hand member of dwang 21 has a plurality of poles 22 of striking, strike pole 22 and be located the top of getting snow pipe 10, the upper end back fixedly connected with pin 23 of connecting rod 20, pin 23 is located the rear of striking pole 22, dwang 21 and fixed pipe 19 elastic hinge, it is close to getting snow pipe 10 to drive and strike pole 22, make and strike pole 22 constantly strike getting snow pipe 10 when rotating at a plurality of snow pipes 10 of getting, make the snow in the snow pipe 10 of getting can drop totally.
When the snow removing device is used, the two mounting frames 1 are mounted at two ends of the top of the greenhouse, when snow is required to be removed, the starting motor 18 drives the threaded rod 17 to rotate, the supporting plate 3 moves back and forth by being meshed with the threaded rod 17, the supporting plate 3 drives the mounting ring 4 to move synchronously by the fixed disk 6, the toothed ring 8 is enabled to be meshed with the toothed plate 9 to move, the mounting ring 4 rotates relative to the fixed disk 6, the mounting ring 4 drives the snow taking pipe 10 to rotate around the axis of the snow collecting cylinder 5 when rotating, when the snow taking pipe 10 rotates to the lower part, the snow taking pipe 10 presses the snow layer on the greenhouse downwards to extrude snow into the snow taking pipe 10, when the snow taking pipe 10 continues to rotate, the internal snow is driven to rotate to the upper part, when the snow taking pipe 10 moves to the range of the snow collecting hopper 16, the gear 13 is meshed with the overturning toothed ring 7 to drive the snow taking pipe 10 to rotate, so that the opening of the snow taking pipe 10 pours the internal snow into the snow collecting cylinder 5 downwards, snow is loaded into the snow gathering cylinder 5 in several times, so that snow cannot be accumulated on the greenhouse during snow removal, the notch ring 14 is inserted into the positioning groove 12 after the gear 13 is disengaged from the overturning toothed ring 7, the short shaft 11 cannot rotate under the action of the positioning groove 12 and the notch ring 14, and the opening direction of the snow taking pipe 10 is ensured to be downward when the snow taking pipe 10 moves to the lower side.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a greenhouse snow removing device for agricultural production, includes mounting bracket (1), its characterized in that: the quantity of mounting bracket (1) is two, the one side that two mounting bracket (1) are close to each other is through two dead lever (2) fixed connection, be provided with backup pad (3) between two mounting bracket (1), backup pad (3) slide and cup joint the surface at two dead lever (2), the right flank fixed connection of backup pad (3) gathers snow section of thick bamboo (5), the fixed cover of right-hand member of backup pad (3) has been cup jointed fixed disk (6), the surface of fixed disk (6) rotates and has cup jointed collar (4), the interior anchor ring of collar (4) rotates and has been pegged graft toothed ring (8), toothed ring (8) are located between fixed disk (6) and two dead lever (2), toothed plate (9) have been meshed above toothed ring (8), both ends are respectively with the one side fixed connection that two mounting bracket (1) are close to each other around toothed plate (9), the right side of collar (4) is provided with a plurality of snow pipes (10), the left side surface of the snow taking pipe (10) is fixedly connected with a short shaft (11), the left end of the short shaft (11) rotates to penetrate through the right side surface of the mounting ring (4), one end, located on the right side of the mounting ring (4), of the short shaft (11) is fixedly sleeved with a gear (13), a positioning groove (12) is formed in the outer surface of the short shaft (11), the positioning groove (12) is located on the right side of the gear (13), the right side of the mounting ring (4) is provided with an overturning toothed ring (7), the overturning toothed ring (7) is fixedly connected with the supporting plate (3), the right side of the overturning toothed plate (9) is provided with a notch ring (14), the overturning toothed ring (7) is located among the gears (13), and the notch ring (14) is located among the short shafts (11);
gather the upper surface of a snow section of thick bamboo (5) and offer into snow mouth (15) with inside intercommunication, the last fixed surface of a snow section of thick bamboo (5) is connected with and is gathered snow fill (16), it is located a plurality of snow pipes (10) of getting to gather snow fill (16), be provided with threaded rod (17) between two dead levers (2), two mounting bracket (1) are rotated respectively and are cup jointed at the both ends of threaded rod (17), positive fixedly connected with motor (18) of mounting bracket (1) that is located the place ahead, the output of motor (18) and the front end fixed connection of threaded rod (17), backup pad (3) screw thread cup joints the surface at threaded rod (17).
2. The snow removing device for the greenhouse for agricultural production according to claim 1, wherein: the top of collar (4) is provided with fixed pipe (19), the bottom surface fixedly connected with connecting rod (20) of fixed pipe (19), the lower extreme of connecting rod (20) and the upper end fixed connection of backup pad (3), and the inside elasticity of fixed pipe (19) articulates there is dwang (21), and the fixed cover of right-hand member of dwang (21) has a plurality of knocking rods (22), knocks the top that pole (22) are located snow pipe (10).
3. The snow removing device for the greenhouse for agricultural production according to claim 2, wherein: the back of the upper end of the connecting rod (20) is fixedly connected with a stop lever (23), and the stop lever (23) is positioned behind the knocking rod (22).
4. The snow removing device for the greenhouse for agricultural production according to claim 1, wherein: the radian of the notch ring (14) is equal to the radian of the turnover gear ring (7), chamfers are arranged at two ends of the notch ring (14), the notch ring (14) and the positioning groove (12) are located on the same plane, and edges on two sides of the positioning groove (12) are provided with round corners.
5. The snow removing device for the greenhouse for agricultural production according to claim 1, wherein: the tooth number of upset ring gear (7) equals with the tooth number of gear (13), and a plurality of minor axes (11) set up with a plurality of snow pipes (10) are coaxial respectively.
6. The snow removing device for the greenhouse for agricultural production according to claim 1, wherein: the plurality of snow taking pipes (10) are arranged in parallel, and the plurality of snow taking pipes (10) are uniformly distributed in an axial circumferential array of the snow gathering cylinder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467864.0A CN114319742A (en) | 2021-12-02 | 2021-12-02 | Greenhouse snow removing device for agricultural production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111467864.0A CN114319742A (en) | 2021-12-02 | 2021-12-02 | Greenhouse snow removing device for agricultural production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114319742A true CN114319742A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111467864.0A Pending CN114319742A (en) | 2021-12-02 | 2021-12-02 | Greenhouse snow removing device for agricultural production |
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| Country | Link |
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| CN (1) | CN114319742A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2923818Y (en) * | 2006-07-24 | 2007-07-18 | 朱方明 | Road snow removing machine |
| CN208001656U (en) * | 2017-12-26 | 2018-10-26 | 金华菁英科技服务有限公司 | A kind of greenhouse snow removing equipment |
| WO2019042477A1 (en) * | 2017-09-04 | 2019-03-07 | 苏州宝时得电动工具有限公司 | Automatic snow removing device and safe snow throwing method thereof |
| CN209913774U (en) * | 2019-07-05 | 2020-01-07 | 贵州财经大学 | Dust and snow removing device applied to roof solar power generation |
| CN110747797A (en) * | 2019-10-31 | 2020-02-04 | 齐金环 | Snow removing equipment |
| CN211368564U (en) * | 2019-09-18 | 2020-08-28 | 吴恒 | Equipment for cleaning ice and snow on road |
| CN113279358A (en) * | 2021-04-26 | 2021-08-20 | 张瑞红 | Road cleaning device based on environmental protection is used |
-
2021
- 2021-12-02 CN CN202111467864.0A patent/CN114319742A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2923818Y (en) * | 2006-07-24 | 2007-07-18 | 朱方明 | Road snow removing machine |
| WO2019042477A1 (en) * | 2017-09-04 | 2019-03-07 | 苏州宝时得电动工具有限公司 | Automatic snow removing device and safe snow throwing method thereof |
| CN208001656U (en) * | 2017-12-26 | 2018-10-26 | 金华菁英科技服务有限公司 | A kind of greenhouse snow removing equipment |
| CN209913774U (en) * | 2019-07-05 | 2020-01-07 | 贵州财经大学 | Dust and snow removing device applied to roof solar power generation |
| CN211368564U (en) * | 2019-09-18 | 2020-08-28 | 吴恒 | Equipment for cleaning ice and snow on road |
| CN110747797A (en) * | 2019-10-31 | 2020-02-04 | 齐金环 | Snow removing equipment |
| CN113279358A (en) * | 2021-04-26 | 2021-08-20 | 张瑞红 | Road cleaning device based on environmental protection is used |
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Application publication date: 20220412 |
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