CN112840967A - Intelligent leaf sweeper - Google Patents

Intelligent leaf sweeper Download PDF

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Publication number
CN112840967A
CN112840967A CN202011635706.7A CN202011635706A CN112840967A CN 112840967 A CN112840967 A CN 112840967A CN 202011635706 A CN202011635706 A CN 202011635706A CN 112840967 A CN112840967 A CN 112840967A
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CN
China
Prior art keywords
shell
rod
cleaning
motor
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011635706.7A
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Chinese (zh)
Inventor
乔国垒
李家靖
章智杰
董自健
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Jiangsu Ocean University
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Jiangsu Ocean University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Ocean University filed Critical Jiangsu Ocean University
Priority to CN202011635706.7A priority Critical patent/CN112840967A/en
Publication of CN112840967A publication Critical patent/CN112840967A/en
Pending legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G20/00Cultivation of turf, lawn or the like; Apparatus or methods therefor
    • A01G20/40Apparatus for cleaning the lawn or grass surface
    • A01G20/43Apparatus for cleaning the lawn or grass surface for sweeping, collecting or disintegrating lawn debris
    • A01G20/47Vacuum or blower devices
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G20/00Cultivation of turf, lawn or the like; Apparatus or methods therefor
    • A01G20/40Apparatus for cleaning the lawn or grass surface
    • A01G20/43Apparatus for cleaning the lawn or grass surface for sweeping, collecting or disintegrating lawn debris
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01HSTREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0827Dislodging 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
    • E01H1/0836Apparatus dislodging all of the dirt by suction ; Suction nozzles
    • E01H1/0845Apparatus dislodging all of the dirt by suction ; Suction nozzles with mechanical loosening or feeding instruments for the dirt to be sucked- up, e.g. brushes, scrapers

Abstract

The invention discloses an intelligent leaf sweeper, which belongs to the technical field of electromechanical equipment and comprises a shell and wheels, wherein a storage battery support, a driving motor support, a PLC (programmable logic controller) board I support and a cylindrical groove are arranged in the shell, a filtering screen is arranged in the cylindrical groove, an air suction device is arranged at the upper part of the filtering screen and comprises an air suction motor and a fan, the fan is connected with the air suction motor, the air suction motor is fixed in the shell through a fixing support, a group of air inlet holes are formed in the shell, cleaning devices are symmetrically arranged at the left side and the right side of the upper part of the shell respectively and comprise a rotating device and a cleaning brush, an elastic rod and a rotating arm, the cleaning brush is connected with the rotating device, an interface is arranged at the upper part of the rotating device, the lower part of the elastic rod is fixed in the interface, the upper part of the elastic rod is connected with the rotating arm, the problem of current lawn leaf be difficult to the clearance is solved, the mainly application is cleared up to the lawn leaf.

Description

Intelligent leaf sweeper
Technical Field
The invention belongs to the technical field of electromechanical equipment, and particularly relates to an intelligent leaf sweeper.
Background
Patent application No.: 201810325158.4 discloses a portable leaf scavenging machine, including cleaning device and collection device, cleaning device includes the cleaning head, the cleaning head is including walking end cover, be provided with the cleaning brush in the walking end cover, be connected with on the walking end cover and inhale the leaf device, the cleaning brush is including brush head and lift brush holder, it includes the fan to inhale the leaf device, the import of fan passes through the pipeline and is connected with walking end cover, the export of fan passes through the pipeline and is connected with collection device, collection device includes the collecting box, the inside leaf accommodation space that is provided with of collecting box, the collecting box bottom is provided with the wheel, be provided with the hand push handle on the collecting box. This portable leaf scavenging machine, small, convenient operation cleans to the fallen leaves specially, can effectually clean and collect the rubbish that bonds subaerial, and work efficiency is high. However, the above patents have the following drawbacks: 1, when the ground is wet, the leaves and weeds can be tightly adhered to the ground, so that the complete cleaning effect cannot be achieved by the design, and the cleaning effect is poor; 2 when the cleaning head is wound by grass, the cleaning effect is influenced, and the cleaning brush needs to be cleaned regularly; 3 when the cleaning brush meets uneven ground, the cleaning brush is easily inserted into the ground at a high position due to the structure of the cleaning brush which is pushed forwards, thereby stopping the cleaning work. Patent application No. 201410000812.6 discloses a road leaf sweeper, which comprises an automobile, a cutter, a fan, a bin and a lifting oil cylinder, and is characterized in that side vertical plates are arranged on two sides of a chassis at the end of an automobile cab, a brush is arranged at the end, close to the ground, of each side vertical plate, a plurality of air blowers forming an included angle of 60-75 degrees with the ground are arranged on each side vertical plate, the air blowers blow leaves and sundries on the ground, a large-flow fan arranged in an opposite air duct in front of the automobile cab forms an included angle of 30-45 degrees with the ground level, the leaves and the sundries are blown up along a certain angle, an induced draft fan is arranged on the air duct to suck the leaves into the bin, a dust adsorption roller made of porous composite materials formed by bonding graphite powder and polytetrafluoroethylene is arranged in the bin, two water injection ports are arranged on the end face of one end of the adsorption roller, the cutter cuts the leaves and, the chopped and collected materials are poured out from the bin, so that the device is clean, environment-friendly and high in efficiency. However, the above patents have the following drawbacks: the intelligent sweeping machine is only suitable for sweeping on a smooth road surface, leaves and weeds on a lawn cannot be swept, the application range is limited, and a new intelligent sweeping machine is needed for better perfecting the functions of the sweeping machine.
Disclosure of Invention
In order to overcome the technical problem, the invention provides an intelligent leaf sweeper, which adopts the following technical scheme:
an intelligent leaf sweeper comprises a shell and wheels, wherein the wheels comprise front wheels and rear wheels, the front wheels and the rear wheels are respectively connected with a rotating shaft, the wheels can be made of solid tires or hollow tires, a battery jar support, a driving motor support, a PLC (programmable logic controller) board I support and a cylindrical groove are arranged in the shell, the driving motor is installed on the driving motor support, the driving motor is connected with a driving gear through a belt, the driving gear is arranged on the rear rotating shaft and used for controlling the whole device to advance and retreat, a filtering screen is arranged in the cylindrical groove, an air suction device is arranged on the upper portion of the filtering screen and comprises an air suction motor and a fan, the fan is connected with the air suction motor, the air suction motor is fixed in a housing through a fixing support, a group of air inlet holes is formed in the housing, the battery jar I is arranged on the battery jar support, the PLC board I is connected with the controller, the lower part of the cylindrical groove is provided with an air suction pipeline which is connected, the shell is also provided with a cleaning door which is connected with the cylindrical groove and used for cleaning ground garbage sucked in the cylindrical groove, the lower part of the air suction pipeline is connected with the feeding pipe, a feeding port is arranged below the feeding pipe, the left side and the right side of the upper part of the shell are respectively and symmetrically provided with a cleaning device, the cleaning device comprises a rotating device, a cleaning brush, an elastic rod and a rotating arm, the cleaning brush is connected with the rotating device, the upper part of the rotating device is provided with a connector, the lower part of the elastic rod is fixed in the connector, the upper part of the elastic rod is connected with the rotating arm, the lower part of the rotating arm is connected with a speed reducing motor, the speed reducing motor is arranged in the shell through a fixing bracket, the, still be equipped with support I in the shell I, be equipped with PLC board II and storage battery II on the support I, storage battery II is connected with PLC board II, PLC board II is connected with the rotating electrical machines, the cleaning brush includes shell II, electric telescopic handle I, electric telescopic handle II, the fan, baffle and scavenging lever, the scavenging lever is the lower part at shell II of circumference form evenly distributed, shell II's lower part intermediate position is equipped with circular through-hole, wherein electric telescopic handle I and electric telescopic handle II's upper portion is connected with respective support respectively, electric telescopic handle I and electric telescopic handle II's lower part is connected with the baffle, be equipped with circular through-hole on the baffle, be equipped with the fan on the baffle, wherein the air outlet block of fan just on circular through-hole, the inside of scavenging lever is equipped with air pipe, air pipe and exhaust vent are linked together, the air outlet is connected with the connecting hole, the lower part of baffle is equipped with the slide bar, the slide bar slides from top to bottom in the circular through-hole of shell II's lower part intermediate position, still be equipped with the support in the shell II, be equipped with storage battery III and PLC board III on the support respectively, storage battery III is connected with PLC board III, PLC board III respectively with electric telescopic handle I, electric telescopic handle II and fan are connected, the slide bar is connected with spout I through connecting rod I, spout I is connected with spout II through connecting rod II, wherein spout I and spout II all can slide from top to bottom freely on the scavenging lever by the block, spout I and spout II are corresponding with respective scavenging lever, PLC board II and PLC board III pass through signal are connected with the controller, the lower part of scavenging lever is equipped with circular ball, the both sides of scavenging lever are equipped with "eight" font brush hair, the brush hair can be dismantled manually and install on the scavenging lever.
Preferably: the feed inlet includes feed inlet and feed inlet down, and feed inlet are connected with the inlet pipe respectively down, and wherein the opening direction of feed inlet is preceding, and the opening direction of feed inlet is downward down, and the feed inlet that the opening direction is forward can inhale the leaf and the garrulous grass that float, and the feed inlet that the opening direction is decurrent can inhale the laminating leaf and the garrulous grass on the earth's surface.
Preferably: the tires of the front wheel and the rear wheel are rubber solid tires, and the design can greatly prolong the service life of the product.
The invention has the following technical effects:
the novel, unique design, work efficiency is higher, and the clearance effect is showing, can clear up leaf, rubbish and garrulous grass on flat lawn and the uneven lawn fast. The intelligent tree planting machine has the advantages that the working efficiency is improved by more than 50% compared with that of the traditional equipment, the problem that the tree leaves are too much to form blockage is not worried about in the using process, the intelligent degree of the whole process is high, the operation is very convenient and fast, the vacancy of the equipment in China is filled, the requirement of social development is met, and the intelligent tree planting machine is suitable for comprehensive popularization and application.
Drawings
FIG. 1 is a view showing the internal structure of the whole apparatus of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a view showing the internal structure of the cleaning apparatus of the present invention;
FIG. 5 is a bottom view of the cleaning apparatus of the present invention;
FIG. 6 is a view of the internal structure of the cleaning rod of the present invention;
fig. 7 is a partially enlarged view of fig. 4.
Detailed Description
Example 1
As shown in fig. 1-7
An intelligent leaf sweeper comprises a shell 4 and wheels, wherein the wheels comprise a front wheel 3 and a rear wheel 31, the front wheel 3 and the rear wheel 31 are respectively connected with a rotating shaft, a storage battery support 44, a driving motor support 42, a PLC board I support 46 and a cylindrical groove 64 are arranged in the shell 4, a driving motor 41 is arranged on the driving motor support 42, the driving motor 41 is connected with a driving gear through a belt, the driving gear is arranged on the rear rotating shaft, a filtering screen 65 is arranged in the cylindrical groove 64, an air suction device is arranged at the upper part of the filtering screen and comprises an air suction motor 66 and a fan 67, the fan 67 is connected with the air suction motor 66, the air suction motor 66 is fixed in an outer cover 69 through a fixing support 67, a group of air inlet holes 81 is arranged on the outer cover 69, a storage battery I45 is arranged on the storage battery support 44, a PLC board I48 is respectively connected with the driving motor 41 and, the lower part of the cylindrical groove 64 is provided with an air suction pipeline 63 connected, the lower part of the air suction pipeline 63 is connected with the feeding pipe 6, and a feeding port is arranged below the feeding pipe 6, and the lawn mower is characterized in that the left side and the right side of the upper part of the shell are respectively and symmetrically provided with a cleaning device 1 used for cleaning leaves and weeds mixed in a lawn, the cleaning device 1 comprises a rotating device 11, a cleaning brush 12, an elastic rod 22 and a rotating arm 22, the cleaning brush 12 is connected with the rotating device 11, the upper part of the rotating device 11 is provided with a connector 23, the lower part of the elastic rod 22 is fixed in the connector 23, the upper part of the elastic rod 22 is connected with the rotating arm 22, the lower part of the rotating arm is connected with a speed reducing motor 21, the speed reducing motor 21 is arranged in the shell 4 through a fixed support, the upper part of the speed reducing motor 21 is provided with a motor baffle plate 5, the rotary motor 112 is fixed in the shell I111 through a fixed bracket I113, a bracket I116 is further arranged in the shell I111, a PLC board II114 and a battery II115 are arranged on the bracket I116, the battery II115 is connected with the PLC board II114, the PLC board II114 is connected with the rotary motor 112, the cleaning brush 12 comprises a shell II121, an electric telescopic rod I125, an electric telescopic rod II124, a fan 128, a baffle plate 126 and a cleaning rod 129, the cleaning rod 129 is uniformly distributed at the lower part of the shell II121 in a circumferential shape, a circular through hole is arranged at the middle position of the lower part of the shell II121, wherein the upper parts of the electric telescopic rod I125 and the electric telescopic rod II124 are respectively connected with the respective bracket, the lower parts of the electric telescopic rod I125 and the electric telescopic rod II124 are connected with the baffle plate 126, a circular through hole is arranged on the baffle plate 126, an air outlet 128 is arranged on the baffle plate 126, the fan 128 is just clamped on the circular through hole, the air outlet is respectively connected with a connecting hole 133 at the upper part of each cleaning rod 129 through a communicating hose 134, a sliding rod 127 is arranged at the lower part of the baffle plate 126, the sliding rod 127 slides up and down in a circular through hole at the middle position of the lower part of the shell II121, a support is also arranged in the shell II121, a battery III123 and a PLC plate III122 are respectively arranged on the support, the battery III123 is connected with the PLC plate III122, the PLC plate III122 is respectively connected with an electric telescopic rod I125, an electric telescopic rod II124 and a fan 128, the sliding rod 128 is connected with a sliding chute I136 through a connecting rod I135, the sliding chute I136 is connected with a sliding chute II137 through a connecting rod II138, the sliding chute I136 and the sliding chute II137 can be clamped on the cleaning rods 129 to freely slide up and down, the sliding chute I136 and the sliding chute II137 correspond to the respective cleaning rods 129, the PLC plate II114 and the PLC plate III122 are connected with the controller 7 through signal transmission, the control over the cleaning device is, the round balls 131 are used to make the rotation of the cleaning rod 129 smoother, and the two sides of the cleaning rod 129 are provided with splay-shaped bristles 132, and the bristles 132 are used to stick some broken leaves and weeds. In order to achieve a better cleaning effect, the feed inlet comprises a front feed inlet 61 and a lower feed inlet 62, the feed inlet 61 and the lower feed inlet 62 are respectively connected with the feed pipe 6, the opening direction of the front feed inlet 61 is forward, the opening direction of the lower feed inlet 62 is downward, an access door I47 and an access door II71 are respectively arranged on the shell 4 and the shell I111, a heat dissipation hole 70 is further arranged on the shell I111, a cleaning door is further arranged on the shell 4 and used for removing collected garbage impurities, symmetrical handles 8 are arranged on the upper portion of the outer cover 69, and the handles 8 are used for pulling up the whole air suction device to replace the filter screen 65.
The working principle of the invention is as follows: the equipment is pushed to a lawn to be worked by pushing the handrail frame 41 of the equipment by hands, the working power supply of each motor is turned on by the controller 7, whether each equipment is operated normally is checked, after the check is finished, the left-right rotation amplitude and the frequency of the speed reducing motor 21 are controlled to control the left-right rotation of the cleaning brush 12 to clean the sundries on the ground, the rotation speed of the rotating motor 112 is controlled to control the rotation of the cleaning brush 12, the sundries and the leaves can be cleaned on the uneven grasslands due to the design that the structure of the cleaning brush 12 is different from that of the traditional soft bristle cleaning brush, the traditional cleaning brush is of a soft bristle structure, only the sundries and the grass are mixed together, but the cleaning effect cannot be achieved, the cleaning brush of the invention is equivalent to a comb, the cleaning brush rotates and swings ceaselessly, and as time increases, a plurality of leaves and weeds are adhered to the cleaning brush 12, at this moment, the cleaning efficiency of the whole equipment is affected, the sliding rod 127 and the up-and-down movement are controlled by controlling the expansion and contraction frequency of the electric telescopic rod I125 and the electric telescopic rod II124 during the design, the up-and-down movement of the sliding rod 127, the up-and-down movement of the sliding chute I35 and the sliding chute II36 are controlled, the up-and-down movement of the sliding chute I35 and the sliding chute II36 can clean the weeds and leaves wound on the cleaning rod 129, the expansion and contraction frequency of the electric telescopic rod is adjusted according to the amount of the wound weeds, when the weeds are few, the electric telescopic rod can push the sliding rod 127 once every 15 minutes, when the weeds are many, the electric telescopic rod can push the sliding rod 127 once every 5 minutes, and all the adjustment can be carried out on the controller 7. Because the cleaning rod 129 is provided with the air outlet 130, the cleaning rod can generate cyclone when rotating every time, fine sundries on the lawn can be blown to float and just be sucked into the feeding pipeline to the cylindrical groove 64 by the front feeding port 61, the design can clean some fine tree leaves and weeds which are difficult to clean, the effect of improving the cleaning effect is achieved, and the collected garbage can be treated through the cleaning door after the work is finished.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (5)

1. Intelligent leaf sweeper, including shell (4) and wheel, the wheel includes front wheel (3) and rear wheel (31), front wheel (3) and rear wheel (31) are connected with the rotation axis respectively, be equipped with storage battery support (44) in shell (4), driving motor support (42), PLC board I support (46) and cylindrical recess (64), driving motor (41) are installed on driving motor support (42), driving motor (41) are connected with drive gear through the belt, drive gear locates on the rear rotation axis, be equipped with filter screen panel (65) in cylindrical recess (64), the upper portion of filter screen panel is equipped with the suction device, the suction device includes suction motor (66) and fan (67), fan (67) are connected with suction motor (66), suction motor (66) are fixed in dustcoat (69) through fixed bolster (67), dustcoat (69) are equipped with a set of inlet vents (81), on storage battery support (44) was located in storage battery I (45), PLC board I (48) were connected with driving motor (41), induced draft motor (66) respectively, and PLC board I (48) are connected with controller (7), and the lower part of cylindrical recess (64) is equipped with induced draft pipeline (63) and is connected, and the lower part of induced draft pipeline (63) is connected with inlet pipe (6), and the below of inlet pipe (6) is equipped with feed inlet, its characterized in that: the left side and the right side of the upper portion of the shell are symmetrically provided with cleaning devices (1) respectively, each cleaning device (1) comprises a rotating device (11), a cleaning brush (12), an elastic rod (22) and a rotating arm (22), the cleaning brush (12) is connected with the rotating device (11), the upper portion of the rotating device (11) is provided with an interface (23), the lower portion of the elastic rod (22) is fixed in the interface (23), the upper portion of the elastic rod (22) is connected with the rotating arm (22), the lower portion of the rotating arm is connected with a speed reduction motor (21), the speed reduction motor (21) is arranged inside the shell (4) through a fixing support, the upper portion of the speed reduction motor (21) is provided with a motor baffle (5), the motor baffle (5) is provided with a vent I (51), the rotating device (11) comprises a shell I (111) and a rotating motor (112), the rotating motor (112) is fixed in the shell I (111) through the, a bracket I (116) is further arranged in the shell I (111), a PLC board II (114) and a battery II (115) are arranged on the bracket I (116), the battery II (115) is connected with the PLC board II (114), the PLC board II (114) is connected with a rotating motor (112), the cleaning brush (12) comprises a shell II (121), an electric telescopic rod I (125), an electric telescopic rod II (124), a fan (128), a baffle plate (126) and a cleaning rod (129), the cleaning rod (129) is uniformly distributed on the lower portion of the shell II (121) in a circumferential shape, a circular through hole is formed in the middle of the lower portion of the shell II (121), wherein the upper portions of the electric telescopic rod I (125) and the electric telescopic rod II (124) are respectively connected with the respective bracket, the lower portions of the electric telescopic rod I (125) and the electric telescopic rod II (124) are connected with the baffle plate (126), a circular through hole is formed in the baffle plate (126), a fan (128) is, wherein the air outlet of the fan (128) is just clamped on the circular through hole, a ventilating duct (139) is arranged inside each cleaning rod (129), the ventilating duct (139) is communicated with an air outlet hole (130), the air outlet is respectively connected with a connecting hole (133) at the upper part of each cleaning rod (129) through a communicating hose (134), the lower part of the baffle plate (126) is provided with a sliding rod (127), the sliding rod (127) slides up and down in the circular through hole at the middle position of the lower part of the shell II (121), a support is also arranged in the shell II (121), the support is respectively provided with a storage battery III (123) and a PLC board III (122), the storage battery III (123) is connected with the PLC board III (122), the PLC board III (122) is respectively connected with an electric telescopic rod I (125), an electric telescopic rod II (124) and the fan (128), the sliding rod (128) is connected with a sliding chute I (136) through a connecting rod, chute I (136) is connected with chute II (137) through connecting rod II (138), wherein chute I (136) and chute II (137) can be clamped on cleaning rod (129) to freely slide up and down, chute I (136) and chute II (137) correspond to respective cleaning rod (129), PLC board II (114) and PLC board III (122) are connected with controller (7) through signals, circular ball (131) are arranged at the lower part of cleaning rod (129), and eight-shaped brush hair (132) are arranged at two sides of cleaning rod (129).
2. The intelligent leaf sweeper of claim 1, wherein: the feed inlet include feed inlet (61) and feed inlet (62) down, feed inlet (61) and feed inlet (62) are connected with inlet pipe (6) respectively down, wherein the opening direction of feed inlet (61) is forward, the opening direction of feed inlet (62) is down.
3. The intelligent leaf sweeper of claim 1, wherein: the tires of the front wheel (3) and the rear wheel (31) are rubber solid tires.
4. The intelligent leaf sweeper of claim 1, wherein: an access door I (47) and an access door II (71) are respectively arranged on the shell (4) and the shell I (111), and a heat dissipation hole (70) is further arranged on the shell I (111).
5. The intelligent leaf sweeper of claim 1, wherein: the upper part of the outer cover (69) is provided with symmetrical handles (8).
CN202011635706.7A 2020-12-31 2020-12-31 Intelligent leaf sweeper Pending CN112840967A (en)

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Application Number Priority Date Filing Date Title
CN202011635706.7A CN112840967A (en) 2020-12-31 2020-12-31 Intelligent leaf sweeper

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114009169A (en) * 2021-11-04 2022-02-08 曹友 Environmental protection leaf is retrieved and is buried clarifier

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Application publication date: 20210528