A novel suction cleaning mechanism for window cleaning robots

Abstract

The utility model relates to a window cleaning robot related technical field, especially a new window cleaning robot's adsorption cleaning mechanism, including fills the shell body, the side of shell body is equipped with drive wheel, the inside connection of shell body has the inner shell, the surface of shell body is provided with adsorption mechanism, the bottom of inner shell is provided with cleaning mechanism. This new window cleaning robot's adsorption cleaning mechanism, by separating the setting of adsorption mechanism and cleaning mechanism, avoid the interference of cleaning wheel rotation to the air flow of air inlet hole, ensure that the negative pressure produced by centrifugal fan is stable and undulation, the adsorption force always keeps constant, the cleaning mechanism is independent of adsorption frame operation, the eccentric circumferential motion of four groups of second cleaning brush and the central rotation of first cleaning brush do not influence each other, guarantee the cleaning coverage expansion times above, and also eliminate the adsorption force attenuation caused by cleaning action, realize the synchronous promotion of adsorption stability and cleaning efficiency.

Description

Technical Field

[0001] This utility model relates to the field of window cleaning robot technology, and in particular to a novel adsorption cleaning mechanism for a window cleaning robot. Background Technology

[0002] A window cleaning robot is an intelligent device used for automated cleaning of glass surfaces in high-rise buildings or complex structures. Its core function is to fix itself to the glass surface through an adsorption device, and then wipe away stains in conjunction with a drive mechanism and cleaning components. Traditional manual window cleaning has problems such as high risk of working at height and low efficiency. Early window cleaning robots mostly used tracked drive and a single cloth for cleaning, and adsorption relied on a vacuum pump, but it had shortcomings such as high noise, high energy consumption, and coarse cleaning path planning. With the development of technology, negative pressure adsorption and visual navigation technologies have been gradually applied, but it still faces challenges such as poor adaptability to complex window frames, weak stain recognition ability, and short battery life. Therefore, there is a particular need for a new type of adsorption cleaning mechanism for window cleaning robots.

[0003] Chinese patent CN219557113U, published on August 22, 2023, discloses a window cleaning robot that is driven by cleaning wheels. The cleaning wheels are set inside the air inlet, allowing the window cleaning robot to move while being adsorbed by a centrifugal fan through the air inlet, making the entire window cleaning robot small and compact. However, the fact that the cleaning wheels are set inside the air inlet may interfere with the airflow when the cleaning wheels are driven to rotate, causing the adsorption force of the centrifugal fan to be unstable. Utility Model Content

[0004] The purpose of this invention is to provide a novel adsorption cleaning mechanism for a window cleaning robot to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel adsorption cleaning mechanism for a window cleaning robot, comprising an outer shell, a drive wheel mounted on the side of the outer shell, an inner shell connected inside the outer shell, an adsorption mechanism provided on the surface of the outer shell, and a cleaning mechanism provided at the bottom of the inner shell.

[0006] The adsorption mechanism includes a volute, which is installed on the top outer side of the inner shell. A centrifugal fan is installed above the volute. Spiral blades are arranged inside the volute. An air extraction pipe is connected to the side surface of the volute. An adsorption frame is connected to the bottom of the inner shell. The air extraction pipe is connected to the surface of the adsorption frame. A sealed cavity is opened inside the adsorption frame. An air inlet is opened at the bottom of the adsorption frame. A sealing ring is arranged around the outer perimeter of the air inlet.

[0007] Preferably, the drive wheels are provided in four identical sets on the surface of the outer shell, and the four sets of drive wheels are symmetrically arranged with respect to each other on the outer shell.

[0008] Preferably, multiple sets of spiral blades are arranged inside the volute, and the multiple sets of spiral blades form a conical structure that is smaller at the top and larger at the bottom.

[0009] Preferably, the exhaust pipes are arranged symmetrically with four identical sets around the central axis of the volute, and the air inlets are equally spaced multiple sets at the bottom of the adsorption frame.

[0010] Preferably, the cleaning mechanism includes an electric push rod, one end of which is installed inside the inner housing. The output end of the electric push rod is connected to a transmission gear plate, and a ratchet is engaged on the side of the transmission gear plate. A rotating shaft is connected to the surface of the ratchet, and a movable disc is connected to the outer side of the rotating shaft. A first cleaning brush is installed at the bottom end of the rotating shaft. A sliding groove is formed on the surface of the movable disc, and a sliding rod is slidably connected inside the sliding groove. A second cleaning brush is installed at the bottom of the sliding rod, and a limit block is connected to the top end of the sliding rod. A limit groove is formed inside the inner housing, and a limit rod is fixedly connected inside the limit groove.

[0011] Preferably, the transmission toothed plate forms a rotating structure by cooperating with the ratchet via an electric push rod, and the slide groove and slide rod are symmetrically distributed in four identical sets around the center of the movable disk, with a second cleaning brush installed at the bottom of each set of slide rods.

[0012] Preferably, the slide rod slides inside the limiting groove via a limiting block and a limiting rod, and the outer wall size of the limiting block matches the inner wall size of the limiting groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The adsorption cleaning mechanism of this novel window cleaning robot separates the adsorption mechanism and the cleaning mechanism. The sealed cavity of the adsorption mechanism is completely isolated from the movement area of ​​the cleaning brush of the cleaning mechanism, avoiding interference of the airflow of the air inlet by the rotation of the cleaning wheel, ensuring that the negative pressure generated by the centrifugal fan is stable and without fluctuation, and the adsorption force remains constant. The cleaning mechanism operates independently of the adsorption frame, and the eccentric circumferential motion of the four sets of second cleaning brushes does not affect the central rotation of the first cleaning brush. This ensures that the cleaning coverage area is expanded by more than 10 times, and also eliminates the attenuation of adsorption force caused by the cleaning action, achieving a simultaneous improvement in adsorption stability and cleaning efficiency. Attached Figure Description

[0014] Figure 1 This is a side view of the structure of the present utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0016] Figure 3 This is a schematic diagram of the adsorption mechanism of this utility model;

[0017] Figure 4 This is a schematic diagram of the cleaning mechanism structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the interaction between the transmission gear plate and the ratchet of this utility model.

[0019] In the diagram: 1. Outer shell; 2. Drive wheel; 3. Inner shell; 4. Adsorption mechanism; 401. Volute; 402. Centrifugal fan; 403. Spiral blade; 404. Exhaust pipe; 405. Adsorption frame; 406. Sealing cavity; 407. Air inlet; 408. Sealing ring; 5. Cleaning mechanism; 501. Electric push rod; 502. Transmission gear plate; 503. Ratchet; 504. Rotating shaft; 505. Movable disc; 506. First cleaning brush; 507. Slide groove; 508. Slide roller; 509. Second cleaning brush; 510. Limiting block; 511. Limiting groove; 512. Limiting rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model provides a technical solution: a novel window cleaning robot with an adsorption cleaning mechanism, including an outer shell 1, a drive wheel 2 installed on the side of the outer shell 1, an inner shell 3 connected inside the outer shell 1, an adsorption mechanism 4 provided on the surface of the outer shell 1, and a cleaning mechanism 5 provided at the bottom of the inner shell 3.

[0022] The adsorption mechanism 4 includes a volute 401, which is installed on the top outer side of the inner housing 3. A centrifugal fan 402 is installed above the volute 401. A spiral blade 403 is installed inside the volute 401. An exhaust pipe 404 is connected to the side surface of the volute 401. An adsorption frame 405 is connected to the bottom of the inner housing 3. The exhaust pipe 404 is connected to the surface of the adsorption frame 405. A sealed cavity 406 is opened inside the adsorption frame 405. An air inlet 407 is opened at the bottom of the adsorption frame 405. A sealing ring 408 is arranged around the outer perimeter of the air inlet 407. Through the configuration of the adsorption mechanism 4, when the window cleaning robot is started, the centrifugal fan 402 begins to run at high speed, driving the spiral blade 403 inside the volute 401 to form a spiral airflow guide. The spiral blade 403... The airflow generated by the centrifugal fan 402 is combed and accelerated, causing it to flow quickly through the extraction pipe 404 to the adsorption frame 405. After the airflow enters the sealed cavity 406 of the adsorption frame 405, it is discharged through the air inlet 407 at the bottom. Since the air inlet 407 is in close contact with the glass surface and the sealing ring 408 on the outer perimeter forms a sealing structure, the air at the air inlet 407 is quickly drawn out, causing the air pressure in the sealed cavity 406 to drop rapidly, forming a negative pressure environment. Under the action of the external atmospheric pressure, the window cleaning robot is firmly adsorbed onto the glass surface. At the same time, the centrifugal fan 402 continues to operate, continuously drawing out the air in the sealed cavity 406 to maintain a stable negative pressure, ensuring that the adsorption force continues to work, so that the robot remains stable during the cleaning process and avoids falling off due to external force or vibration.

[0023] Furthermore, four identical sets of drive wheels 2 are arranged on the surface of the outer shell 1, and the four sets of drive wheels 2 are symmetrically arranged on the outer shell 1. Through the arrangement of drive wheels 2, the four symmetrically distributed drive wheels 2 give the window cleaning robot flexible movement ability. Through differential speed control, it can realize actions such as straight-line movement, turning, and rotating in place. It can still move accurately in complex window frame structures and irregular glass surfaces, effectively avoiding cleaning blind spots. The symmetrical layout makes the robot evenly stressed. Even if some drive wheels 2 encounter stains and slip, the remaining drive wheels can still maintain balance and move, improving passability and reliability in complex environments. At the same time, it is convenient to optimize path planning through algorithms to improve cleaning efficiency.

[0024] Furthermore, multiple sets of spiral blades 403 are arranged inside the volute 401, and these multiple sets of spiral blades 403 form a conical structure that is smaller at the top and larger at the bottom. Through the arrangement of the spiral blades 403, when the centrifugal fan 402 is running, the airflow can be accelerated and guided in layers. The upper narrow opening gathers the airflow and increases the flow velocity, while the lower wide opening diffuses the airflow and increases the coverage area, so that the airflow flows more evenly through the exhaust pipe 404 to the adsorption frame 405. This structure not only reduces airflow turbulence and energy loss, but also reduces noise and enhances the negative pressure generation efficiency. Under the same fan power, the sealing cavity 406 can form a stable negative pressure more quickly, improving the stability and response speed of the adsorption force.

[0025] Furthermore, four identical sets of suction pipes 404 are symmetrically arranged around the central axis of the volute 401, and multiple identical sets of air inlets 407 are equally spaced at the bottom of the adsorption frame 405. Through the arrangement of suction pipes 404 and air inlets 407, the four symmetrically distributed suction pipes 404, together with the multiple equally spaced air inlets 407 at the bottom of the adsorption frame 405, can achieve synchronous suction of multiple points on the glass surface, making the negative pressure distribution in the sealed cavity 406 more uniform, avoiding insufficient local adsorption force that could cause the robot to tilt or fall off. The design of multiple air inlets 407 increases the suction contact area, enabling effective adsorption to be formed quickly even in narrow gaps or uneven glass surfaces. The symmetrical suction pipes 404 ensure airflow balance, preventing uneven suction force from affecting the robot's movement posture, and significantly improving adsorption reliability and environmental adaptability.

[0026] Furthermore, the cleaning mechanism 5 includes an electric push rod 501, one end of which is installed inside the inner housing 3. The output end of the electric push rod 501 is connected to a transmission gear plate 502. A ratchet 503 meshes with the side of the transmission gear plate 502. A rotating shaft 504 is connected to the surface of the ratchet 503. A movable disc 505 is connected to the outer side of the rotating shaft 504. A first cleaning brush 506 is installed at the bottom end of the rotating shaft 504. A groove 507 is formed on the surface of the movable disc 505. The cleaning mechanism 5 has an internal sliding connection of a slide rod 508, a second cleaning brush 509 installed at the bottom of the slide rod 508, and a limit block 510 connected to the top of the slide rod 508. A limit groove 511 is formed inside the inner housing 3, and a limit rod 512 is fixedly connected inside the limit groove 511. Through the configuration of the cleaning mechanism 5, when the cleaning mechanism 5 is activated, the output end of the electric push rod 501 drives the transmission gear plate 502 to perform linear reciprocating motion. The meshing of the transmission gear plate 502 with the ratchet 503 causes the rotating shaft 504 to intermittently rotate. As the rotating shaft 504 rotates, the first cleaning brush 506 at the bottom of the rotating shaft 504 rotates accordingly, performing circumferential cleaning on the glass surface. Simultaneously, the movable disk 505 on the outer side of the rotating shaft 504 rotates synchronously. The sliding roller 508 in the sliding groove 507 on the surface of the movable disk 505 slides outward along the sliding groove 507 under the action of centrifugal force. The limiting block 510 at the top of the sliding roller 508 makes a curved movement along the limiting rod 512 in the limiting groove 511. The constraint of the limiting rod 512 on the limiting block 510 causes the sliding roller 508 to move outward. As the brush slides, it deflects at an angle, which in turn causes the second cleaning brush 509 at the bottom to make an eccentric circular motion. As the movable disc 505 continues to rotate, the motion trajectory of the second cleaning brush 509 covers the annular area not touched by the first cleaning brush 506, forming a complementary cleaning path. The reciprocating frequency of the electric push rod 501 and the intermittent transmission characteristics of the ratchet 503 cause the rotation speed and position of the first cleaning brush 506 and the second cleaning brush 509 to change continuously, effectively avoiding cleaning blind spots and improving the overall cleaning coverage.

[0027] Furthermore, the transmission toothed plate 502, through the interaction of the electric push rod 501 and the ratchet 503, forms a rotating structure. The slide groove 507 and slide roller 508 are symmetrically distributed in four identical sets around the center of the movable disk 505, and a second cleaning brush 509 is installed at the bottom of each set of slide roller 508. Through the arrangement of the transmission toothed plate 502, ratchet 503, slide groove 507, slide roller 508, and second cleaning brush 509, dynamic expansion and path optimization of the cleaning surface are achieved: the transmission toothed plate 502 reciprocates under the drive of the electric push rod 501, and after meshing with the ratchet 503, the linear motion is converted into intermittent rotation of the rotating shaft 504, driving the first cleaning brush 509... 06. Basic circumferential cleaning is performed. When the movable disc 505 rotates, the four symmetrically distributed sliding grooves 507 and sliding rollers 508 use centrifugal force to make the second cleaning brush 509 slide radially. With the intermittent transmission of the ratchet 503, a compound motion trajectory of "rotation + radial expansion" is formed, which expands the cleaning range from a single center to a ring area. Compared with the traditional single cleaning brush, the coverage area is increased by more than 3 times. When the four sets of second cleaning brushes 509 operate synchronously, they can cover different radii of the glass surface through differential rotation. It is especially suitable for cleaning round windows or curved glass without dead angles. Moreover, the intermittent transmission characteristic can avoid repeated wear of the cleaning brush in the same position and extend its service life.

[0028] Furthermore, the slide rod 508 slides within the limiting groove 511 via the limiting block 510 and the limiting rod 512. The outer wall dimension of the limiting block 510 matches the inner wall dimension of the limiting groove 511. Through the setting of the limiting block 510 and the limiting groove 511, the precise fit between the limiting block 510 and the limiting groove 511 provides rigid guiding constraint for the movement of the slide rod 508: when the movable disk 505 rotates, the limiting block 510 slides within the limiting groove 511 along the limiting rod 512, ensuring that while the slide rod 508 moves radially in the slide groove 507, its angle... The deflection trajectory remains precise and controllable, preventing the cleaning brush from shaking or shifting due to centrifugal force. When the slide roller 508 slides outward to its maximum radius, the limiting block 510 contacts the inner wall of the limiting groove 511, limiting its excessive offset and ensuring that the second cleaning brush 509 always remains perpendicular to the glass surface, improving the uniformity of cleaning pressure. In addition, the close cooperation between the two can absorb the vibration generated during the cleaning process, preventing the connection between the slide roller 508 and the slide groove 507 from loosening due to long-term friction, ensuring the consistency of movement of multiple sets of cleaning brushes, and maintaining a stable cleaning effect.

[0029] Working Principle: When this new window cleaning robot is running, all mechanisms work together to achieve efficient cleaning. Upon startup, the adsorption mechanism 4 works first, with the centrifugal fan 402 rotating at high speed. This, combined with the conical spiral blades 403 inside the volute 401, accelerates and guides the airflow in layers. Through four symmetrically distributed extraction pipes 404, air is quickly drawn out of the sealed cavity 406 of the adsorption frame 405. The sealing ring 408 on the outside of the air inlet 407 fits tightly against the glass surface, creating a sealed environment. This causes the sealed cavity 406 to quickly generate negative pressure. Under atmospheric pressure, the robot firmly adheres to the glass surface. The centrifugal fan... The robot 402 operates continuously to maintain a stable adsorption force, ensuring operational safety. Once adsorption is stable, the drive wheels 2 begin to operate. The four symmetrically distributed drive wheels 2 achieve flexible steering and movement through differential speed control. As the robot moves along the glass surface, the cleaning mechanism 5 starts simultaneously. The electric push rod 501 drives the transmission gear plate 502 to perform linear reciprocating motion. The meshing of the transmission gear plate 502 with the ratchet 503 converts the linear motion into intermittent rotation of the rotating shaft 504. The first cleaning brush 506 at the bottom of the rotating shaft 504 then performs circumferential cleaning. At the same time, the movable disk 5 on the outer side of the rotating shaft 504... 05. The movable disc 505 rotates synchronously. Within four symmetrically distributed grooves 507 on its surface, the sliding rod 508 slides outward along the grooves 507 under centrifugal force. The limiting block 510 at the top of the sliding rod 508 moves in a curved path along the limiting rod 512 within the limiting groove 511. Constrained by the limiting rod 512, the sliding rod 508 deflects at an angle during sliding, causing the second cleaning brush 509 at the bottom to perform an eccentric circular motion. The combined motion trajectories of the two sets of cleaning brushes complement each other. The first cleaning brush 506 is responsible for cleaning the central area, while the second cleaning brush 509 covers the annular extended area. The electric push rod... The reciprocating frequency of 501 and the intermittent transmission characteristics of ratchet 503 cause the rotation speed and position of the cleaning brush to change continuously, avoiding cleaning blind spots and improving cleaning efficiency and coverage. Throughout the operation, drive wheel 2 continuously plans the path, suction mechanism 4 maintains stable negative pressure, and cleaning mechanism 5 dynamically adjusts the cleaning range. The three work closely together to enable the window cleaning robot to adapt to glass surfaces of different shapes and sizes. In complex window frame structures and irregular glass environments, it can achieve efficient, safe, and thorough cleaning operations. This completes the usage process of the suction cleaning mechanism of a new type of window cleaning robot.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel adsorption cleaning mechanism for a window cleaning robot, comprising a housing (1), characterized in that: A drive wheel (2) is installed on the side of the outer shell (1), an inner shell (3) is connected inside the outer shell (1), an adsorption mechanism (4) is provided on the surface of the outer shell (1), and a cleaning mechanism (5) is provided at the bottom of the inner shell (3). The adsorption mechanism (4) includes a volute (401), which is installed on the top of the outer side of the inner shell (3). A centrifugal fan (402) is installed above the volute (401). A spiral blade (403) is provided inside the volute (401). An exhaust pipe (404) is connected to the side surface of the volute (401). An adsorption frame (405) is connected to the bottom of the inner shell (3). The exhaust pipe (404) is connected to the surface of the adsorption frame (405). A sealing cavity (406) is opened inside the adsorption frame (405). An air inlet (407) is opened at the bottom of the adsorption frame (405). A sealing ring (408) is provided around the outer side of the air inlet (407).

2. The adsorption cleaning mechanism of a novel window cleaning robot according to claim 1, characterized in that: The drive wheels (2) are provided with four identical sets on the surface of the outer shell (1), and the four sets of drive wheels (2) are symmetrically arranged on the outer shell (1).

3. The adsorption cleaning mechanism of a novel window cleaning robot according to claim 1, characterized in that: The spiral blades (403) are arranged in multiple sets inside the volute (401), and the multiple sets of spiral blades (403) form a conical structure with a smaller top and a larger bottom.

4. The adsorption cleaning mechanism of a novel window cleaning robot according to claim 1, characterized in that: The exhaust pipe (404) is symmetrically arranged with four identical sets around the central axis of the volute (401), and the air inlet (407) is equally spaced with multiple identical sets at the bottom of the adsorption frame (405).

5. The adsorption cleaning mechanism of a novel window cleaning robot according to claim 1, characterized in that: The cleaning mechanism (5) includes an electric push rod (501), one end of which is installed inside the inner housing (3). The output end of the electric push rod (501) is connected to a transmission gear plate (502). A ratchet (503) is engaged on the side of the transmission gear plate (502). A rotating shaft (504) is connected to the surface of the ratchet (503). A movable disc (505) is connected to the outer side of the rotating shaft (504). The bottom of the rotating shaft (504) The first cleaning brush (506) is installed at the end. A sliding groove (507) is opened on the surface of the movable disc (505). A sliding rod (508) is slidably connected inside the sliding groove (507). A second cleaning brush (509) is installed at the bottom of the sliding rod (508). A limiting block (510) is connected to the top of the sliding rod (508). A limiting groove (511) is opened inside the inner shell (3). A limiting rod (512) is fixedly connected inside the limiting groove (511).

6. The adsorption cleaning mechanism of a novel window cleaning robot according to claim 5, characterized in that: The transmission tooth plate (502) is connected to the ratchet (503) via an electric push rod (501) to form a rotating structure. The slide groove (507) and slide rod (508) are symmetrically distributed in four groups around the center of the movable disk (505), and a second cleaning brush (509) is installed at the bottom of each group of slide rods (508).

7. The adsorption cleaning mechanism of a novel window cleaning robot according to claim 6, characterized in that: The slide rod (508) slides inside the limiting groove (511) via the limiting block (510) and the limiting rod (512). The outer wall size of the limiting block (510) matches the inner wall size of the limiting groove (511).

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