Cleaning robot

Abstract

This invention relates to the field of intelligent cleaning equipment and discloses a cleaning robot, including a chassis, a squeegee, a wastewater tank, a blower module, and a cleaning module. The blower module creates negative pressure in the wastewater tank to collect wastewater from the squeegee. The cleaning module includes a roller brush module and side brush modules mounted thereon. In the roller brush module, the mounting frame unit includes a first mounting frame, a second mounting frame, and a linkage assembly. The first mounting frame is connected to the chassis. The second mounting frame is connected to the first mounting frame via the linkage assembly. The roller brush unit includes a mounting base plate, a roller brush assembly, and a roller brush drive assembly. The mounting base plate is connected to the second mounting frame. The roller brush assembly is located at the bottom of the mounting base plate, and the roller brush drive assembly and the side brush modules are located at the left and right ends of the mounting base plate, respectively. The output end of the lifting drive assembly is connected to the second mounting frame.

Description

Technical Field

[0001] This invention relates to the field of intelligent cleaning equipment, and more particularly to a cleaning robot. Background Technology

[0002] Cleaning robots are suitable for various indoor environments, such as shopping malls, office buildings, corridors, and hotels, replacing manual cleaning, reducing labor intensity, and offering high cleaning efficiency. The bottom of a cleaning robot is generally equipped with a liftable roller brush module and a side brush module. The roller brush module specifically includes a roller brush lifting drive and the roller brush itself. When cleaning is needed, the roller brush lifting drive lowers the roller brush to contact the ground, and the roller brush rotates to sweep up debris. When cleaning is not needed, the roller brush lifting drive raises the roller brush, moving it away from the ground to avoid scraping against surfaces during robot movement. Similarly, the side brush module includes a side brush lifting drive and a side brush. The side brush lifting drive raises and lowers the side brush to clean or avoid obstacles.

[0003] However, the lifting and lowering movements of existing roller brushes and side brushes are not smooth enough, and they are prone to tilting during the lifting and lowering process, resulting in uneven contact between the roller brush and the ground, affecting the cleaning effect. Furthermore, the roller brush lifting drive mechanism drives the roller brush to move up and down, switching between working and non-working states. When the roller brush is in working state, the output end of the roller brush lifting drive mechanism is no longer activated, meaning the absolute height of the roller brush does not change. However, the surface to be cleaned may have varying hardness, unevenness, steps, or carpets with different pile lengths. If the absolute height of the roller brush remains constant during cleaning, it will lead to excessive or insufficient contact force between the roller brush and the surface to be cleaned, resulting in poor cleaning effect and severe wear on the roller brush or the surface to be cleaned. Summary of the Invention

[0004] The purpose of this invention is to provide a cleaning robot in which the roller brush module and the side brush module move smoothly up and down, ensuring uniform contact between the two and the surface to be cleaned, resulting in good cleaning effect and minimal wear on the roller brush, side brush and the surface to be cleaned.

[0005] To achieve the above objectives, the following technical solution is provided:

[0006] A cleaning robot includes a chassis, a squeegee, a wastewater tank, and a blower module. The blower module is used to create negative pressure inside the wastewater tank to collect wastewater from the squeegee. The chassis is also equipped with a cleaning module, which includes a roller brush module and a side brush module mounted on the roller brush module.

[0007] The roller brush module includes:

[0008] The mounting bracket unit includes a first mounting bracket, a second mounting bracket, and a linkage assembly. The first mounting bracket is connected to the chassis. The second mounting bracket is connected to the first mounting bracket via the linkage assembly.

[0009] The roller brush unit includes a mounting plate, a roller brush assembly, and a roller brush drive assembly. The mounting plate is connected to the second mounting bracket. The roller brush assembly is disposed at the bottom of the mounting plate. The roller brush drive assembly and the side brush module are disposed at the left and right ends of the mounting plate, respectively.

[0010] A lifting drive assembly, the output of which is connected to the second mounting bracket;

[0011] The linkage assembly includes:

[0012] Two parallel first connecting arms of equal length, with the two ends of the first connecting arms respectively hinged to the first mounting bracket and the second mounting bracket;

[0013] The second connecting arm is hinged at both ends to the first mounting bracket and the second mounting bracket respectively, and the second connecting arm is parallel to the plane where the two first connecting arms are located.

[0014] The linkage assembly is provided in two sets, and the two sets of linkage assemblies are arranged symmetrically about a reference plane, which passes through the center of gravity of the cleaning module.

[0015] Furthermore, the chassis includes a first connecting portion and a first guide portion;

[0016] The first mounting bracket includes a second connecting part and a second guide part, the second guide part being slidably inserted into the first guide part, and the second connecting part being detachably connected to the first connecting part.

[0017] Furthermore, the second mounting bracket includes a first hook, and the output end of the lifting drive assembly is provided with a second hook, which is hooked and connected to the first hook in a vertical hooking connection.

[0018] The hooking areas of the first hook and the second hook coincide with the center of gravity of the cleaning module in the vertical projection.

[0019] Furthermore, the roller brush assembly is slidably inserted into the bottom of the mounting base plate to be connected to the roller brush drive assembly for transmission.

[0020] The mounting plate is provided with a first mounting hole, and the roller brush assembly is provided with a first locking component; the first locking component has a locked state when inserted into the first mounting hole and an unlocked state when disengaged from the first mounting hole.

[0021] Furthermore, the fan module includes: a housing assembly defining an air outlet duct; the housing assembly includes an air inlet cover, a volute, and an air outlet cover arranged sequentially; the air inlet cover has an air inlet communicating with the air outlet duct, and the air outlet cover has an air outlet communicating with the air outlet duct; the volute includes an inner shell, an outer shell, and multiple air guides; the outer shell is spaced outside the inner shell, and the two form a main air outlet duct; the air guides are connected between the inner shell and the outer shell and are located at the inlet of the main air outlet duct; the multiple air guides are spaced apart circumferentially along the volute, and each air guide is inclined along the axial direction of the volute;

[0022] The motor is housed within the inner casing;

[0023] An impeller is disposed on the inner side of the air inlet cover, and the impeller is connected to the output shaft of the motor;

[0024] A duct partition is disposed between the inner shell and the outer shell and located at the outlet of the main air duct. The duct partition includes an air outlet area and a non-air outlet area arranged circumferentially, and the air outlet area is provided with an air outlet hole.

[0025] Furthermore, the air outlet cover, the volute, and the air inlet cover are arranged sequentially from top to bottom.

[0026] Furthermore, the fan module also includes:

[0027] An air inlet duct is provided, wherein the air inlet duct is arranged vertically, the lower end of the air inlet duct is connected to the air inlet on the air inlet cover, and the upper end of the air inlet duct is used to connect to the water suction chamber of the squeegee through a first adapter duct.

[0028] The air outlet duct is arranged vertically, with its upper port connected to the air outlet on the air outlet cover, and its lower port connected to the sewage tank via a second transfer duct.

[0029] Furthermore, the air inlet is tangent to the inner wall of the air inlet cover; the air outlet is tangent to the inner wall of the air outlet cover.

[0030] Furthermore, it also includes a first silencer, which is disposed between the inlet of the main air duct and the air inlet cover, and is sleeved on the outside of the impeller;

[0031] The second silencer is disposed in the main air duct and located between the air guide and the air duct partition.

[0032] Furthermore, it also includes a third silencing component, which is disposed between the air duct partition and the air outlet cover.

[0033] The beneficial effects of this invention are as follows:

[0034] In the cleaning robot provided by this invention, a lifting drive assembly drives the second mounting frame, the roller brush unit, and the side brush module to rise and fall. The roller brush drive assembly and the side brush module are located at opposite ends in the left-right direction, so that the center of gravity of the entire cleaning module is located at or near the middle position in the left-right direction, thereby improving the lifting stability of the roller brush unit and the side brush module. The second mounting frame is connected to the first mounting frame through a linkage assembly, which improves the lifting stability of the first mounting frame and the roller brush unit and side brush module on it, reduces tilting and swaying, thereby ensuring uniform contact between the roller brush unit and the side brush module and the surface to be cleaned, improving the cleaning effect, and reducing wear on the roller brush, side brush, and the surface to be cleaned. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the chassis, roller brush module, and side brush module provided in an embodiment of the present invention;

[0037] Figure 2 A first axonometric view of the chassis provided in an embodiment of the present invention;

[0038] Figure 3 A second axonometric view of the chassis provided in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the first mounting bracket being installed on the chassis according to an embodiment of the present invention;

[0040] Figure 5 for Figure 4 A schematic diagram of the middle section structure;

[0041] Figure 6 A schematic diagram of the mounting base plate, second mounting bracket, connecting rod assembly, and elastic element provided in the embodiments of the present invention;

[0042] Figure 7 Axonometric view of the mounting base plate and the second mounting bracket provided in the embodiments of the present invention;

[0043] Figure 8 An isometric view of the first mounting bracket provided in this embodiment of the invention;

[0044] Figure 9 A schematic diagram of the lifting drive assembly, the first hook, and the second hook provided in the embodiments of the invention;

[0045] Figure 10 A first isometric view of the cleaning module provided in an embodiment of the present invention;

[0046] Figure 11 A second isometric view of the cleaning module provided in an embodiment of the present invention;

[0047] Figure 12 A side view of the cleaning module provided in an embodiment of the present invention;

[0048] Figure 13 This is a first isometric view of the roller brush module provided in an embodiment of the present invention;

[0049] Figure 14 This is a second isometric view of the roller brush module provided in an embodiment of the present invention;

[0050] Figure 15 This is a third isometric view of the roller brush module provided in an embodiment of the present invention;

[0051] Figure 16 An isometric view of the mounting plate provided in an embodiment of the present invention from an outer perspective;

[0052] Figure 17 An isometric view of the mounting plate provided in an embodiment of the present invention from another external perspective;

[0053] Figure 18 An isometric view of the mounting plate and the air guide provided in an embodiment of the present invention from an inner perspective.

[0054] Figure 19 This is a front view of the fan module provided in an embodiment of the present invention;

[0055] Figure 20 This is an isometric view of the fan module provided in an embodiment of the present invention;

[0056] Figure 21 This is a cross-sectional view of the fan module provided in an embodiment of the present invention;

[0057] Figure 22 A first isometric view of the volute provided in an embodiment of the present invention;

[0058] Figure 23 A second isometric view of the volute provided in an embodiment of the present invention;

[0059] Figure 24 A third axonometric view of the volute provided in an embodiment of the present invention;

[0060] Figure 25 An isometric view of the duct baffle provided in an embodiment of the present invention;

[0061] Figure 26 This is an isometric view of the air outlet cover provided in an embodiment of the present invention. Detailed Implementation

[0062] This embodiment provides a cleaning robot, including a chassis and a squeegee, a wastewater tank, and a blower module mounted on the chassis. The blower module creates negative pressure inside the wastewater tank to collect wastewater from the squeegee. A cleaning module is also mounted on the chassis, comprising a roller brush module and side brush modules mounted on the roller brush module.

[0063] like Figures 1-26 As shown, the roller brush module 200 includes a mounting frame unit, a roller brush unit, and a lifting drive assembly 6. The mounting frame unit includes a first mounting frame 1, a second mounting frame 2, and a connecting rod assembly 7. The first mounting frame 1 is connected to the chassis 100. The second mounting frame 2 is spaced below the first mounting frame 1 and connected to the first mounting frame 1 via the connecting rod assembly 7. The roller brush unit includes a mounting base plate 4, a roller brush assembly 3, and a roller brush drive assembly 5. The mounting base plate 4 is connected to the second mounting frame 2. The roller brush assembly 3 is located at the bottom of the mounting base plate 4. The roller brush drive assembly 5 and the aforementioned side brush module 300 are located at the left and right ends of the mounting base plate 4, respectively. The lifting drive assembly 6 is mounted on the chassis 100, and its output end is connected to the second mounting frame 2. The lifting drive assembly 6 drives the second mounting frame 2, the roller brush unit, and the side brush module 300 to rise and fall. The roller brush drive assembly 5 and the side brush module 300 are located at the two ends in the left and right directions, so that the center of gravity of the entire cleaning module is located at or near the middle position in the left and right directions, thereby improving the lifting and lowering stability of the roller brush unit and the side brush module 300.

[0064] The first mounting frame 1 and the second mounting frame 2 are connected by a linkage assembly 7, allowing the second mounting frame 2 to rise and fall relative to the first mounting frame 1 under the drive of the lifting drive assembly 6, thereby realizing the lifting and lowering of the roller brush unit and the side brush module 300. Specifically, when cleaning is required, the lifting drive assembly 6 drives the second mounting frame 2 and the roller brush unit and side brush module 300 on it to descend, and the roller brush unit and side brush module 300 contact the surface to be cleaned. The side brush module sweeps the debris on the surface to be cleaned backward and inward, causing the debris to gather in front of the roller brush unit, which then sweeps the debris on the surface to be cleaned. When cleaning is not required, the lifting drive assembly 6 drives the second mounting frame 2 and the roller brush unit and side brush module 300 on it to rise away from the surface to be cleaned, avoiding scratches during the cleaning robot's movement. For example, the lifting drive assembly 6 is a push rod motor.

[0065] The second mounting bracket 2 is connected to the first mounting bracket 1 via the connecting rod assembly 7, which improves the lifting stability of the first mounting bracket 2 and the roller brush unit and side brush module 300 on it, reduces tilting and shaking, thereby ensuring the uniform contact between the roller brush unit and side brush module 300 and the surface to be cleaned, improving the cleaning effect, and reducing the wear of the roller brush, side brush and the surface to be cleaned.

[0066] Specifically, the roller brush assembly 3 includes a roller brush 31, a flow guide 32, and a dust collection box 33. The roller brush 31 is disposed inside the flow guide 32. Both the flow guide 32 and the dust collection box 33 are mounted on the bottom of the mounting plate 4, with the dust collection box 33 located in front of the flow guide 32. The mounting plate 4 is connected to the second mounting bracket 2, thereby enabling the roller brush unit to be mounted on the second mounting bracket 2. Since the roller brush module 200 is located at the front end of the cleaning robot, and the dust collection box 33 is located in front of the flow guide 32, the dust collection box 33 is located at the very front of the entire cleaning robot.

[0067] The linkage assembly 7 includes two parallel first connecting arms 71 of equal length. Both ends of the two first connecting arms 71 are hinged to the first mounting bracket 1 and the second mounting bracket 2, respectively. Two sets of linkage assemblies 7 are provided, symmetrically arranged with a reference plane as the plane of symmetry, the reference plane passing through the center of gravity of the cleaning module. The two first connecting arms 71 are parallel and of equal length, and both ends of the two first connecting arms 71 are hinged to the first mounting bracket 1 and the second mounting bracket 2, thus forming a parallel double-crank mechanism. Furthermore, the two sets of linkage assemblies 7 are symmetrically arranged, forming two symmetrical parallel double-crank mechanisms in the left-right direction where the roller brush assembly 3 is larger. This ensures that the second mounting bracket 2 and the roller brush assembly 3 can stably rise and fall under the drive of the lifting drive assembly 6, reducing tilting during the lifting process and keeping the roller brush assembly 3 parallel to the surface to be cleaned, ensuring effective cleaning.

[0068] The linkage assembly 7 also includes a second connecting arm 72, the two ends of which are hinged to the first mounting frame 1 and the second mounting frame 2, respectively, and the second connecting arm 72 is parallel to the plane containing the two first connecting arms 71. Thus, the addition of the second connecting arm 72 further balances and coordinates the movement of the second mounting frame 2 relative to the first mounting frame 1, thereby further improving the smoothness of the lifting and lowering of the roller brush assembly 3. In this embodiment, the second connecting arm 72 is staggered from the two first connecting arms 71, reducing the possibility of tilting during the lifting and lowering of the second mounting frame 2 and the roller brush assembly 3.

[0069] Optionally, the first mounting frame 1 includes two first mounting brackets 11, and the second mounting frame 2 includes two second mounting brackets 21; the two first mounting brackets 11 and the two second mounting brackets 21 are arranged symmetrically from left to right; one set of connecting rod assemblies 7 connects the first mounting bracket 11 and the second mounting bracket 21 on the left, and the other set of connecting rod assemblies 7 connects the first mounting bracket 11 and the second mounting bracket 21 on the right. Thus, both the first mounting frame 1 and the second mounting frame 2 have a symmetrical structure from left to right, further improving the smoothness of the lifting and lowering of the roller brush assembly 3.

[0070] Optionally, the chassis 100 includes a first connecting portion 101 and a first guide portion; the first mounting bracket 11 includes a second connecting portion and a second guide portion, the second guide portion being slidably inserted into the first guide portion, and the second connecting portion being detachably connected to the first connecting portion 101. The slidable insertion of the second guide portion into the first guide portion improves the assembly accuracy and ease of assembly between the second mounting bracket 2 and the chassis 100. The roller brush 31 is a consumable part, and its detachable connection between the second connecting portion and the first connecting portion 101 allows for quick assembly and disassembly of the roller brush module 200 from the chassis 100, facilitating the maintenance and replacement of the roller brush module 200.

[0071] Optionally, the first guide portion is a guide rail 104. The first mounting bracket 11 includes a mounting plate 111, a second connecting portion is a first folded edge 1111 disposed on the mounting plate 111, and a second guide portion is a second folded edge 1112 disposed on the mounting plate 111. The second folded edge 1112 is slidably inserted into the guide rail 104, and the first folded edge 1111 is bolted to the first connecting portion 101. In this embodiment, the front end of the chassis 100 is an upwardly raised plate, and a reinforcing rib plate 102 is provided at its bottom. A supporting rib 103 is provided on the reinforcing rib plate 102, and the supporting rib 103 is spaced and directly opposite the chassis 100. The supporting rib 103, the reinforcing rib plate 102, and the chassis 100 surround and form a U-shaped guide rail 104. Both the second connecting portion and the second guide portion are formed by bending and folding the mounting plate 111, which is simple to manufacture and has high structural strength. The first folded edge 1111 is located at the rear end of the mounting plate 111 in the insertion direction, and the first connecting part 101 is located at the front end of the chassis 100. When installing the first mounting bracket 11, the first mounting bracket 11 is pushed into the bottom side of the chassis 100 from front to back, and the second folded edge 1112 slides along the slide rail until the first folded edge 1111 abuts against the first connecting part 101. The first folded edge 1111 and the first connecting part 101 are bolted together, providing a secure connection and easy assembly and disassembly. In other embodiments, the first connecting part 101 and the second connecting part can also be connected by a detachable method such as a snap-fit, which is not limited here.

[0072] Optionally, two second guide sections are provided, with the two second guide sections located on both sides of the mounting plate 111 in the insertion direction, and two guide rails 104 are also provided accordingly, thereby improving the assembly accuracy of the mounting plate 111.

[0073] Optionally, a first limiting part 1113 is provided on the first mounting bracket 11, and a second limiting part 211 is provided on the second mounting bracket 21. When the second limiting part 211 is in contact with the first limiting part 1113, the roller brush assembly 3 descends to its lowest point. By setting the first limiting part 1113 and the second limiting part 211, the maximum descent stroke of the roller brush assembly 3 is limited, preventing the roller brush assembly 3 from being excessively squeezed against the surface to be cleaned and thus accelerating damage. The mechanical limiting structure provides higher safety. In this embodiment, the first limiting part 1113 is an L-shaped plate formed by continuously bending the mounting plate 111. The second limiting part 211 is formed by bending the side of the second mounting bracket 21.

[0074] Furthermore, the first mounting bracket 11 also includes a first mounting seat 112 and a second mounting seat 113 disposed on the bottom side of the mounting plate 111, and the second mounting bracket 21 includes a first mounting seat portion 212 and a second mounting seat portion 213. One end of the first connecting arm 71 is rotatably connected to the first mounting seat 112 via a pivot, and the other end is rotatably connected to the first mounting seat portion 212 via a pivot. One end of the second connecting arm 72 is rotatably connected to the second mounting seat 113 via a pivot, and the other end is rotatably connected to the second mounting seat portion 213 via a pivot.

[0075] Furthermore, the second mounting bracket 21 also includes two third connecting parts 214, which are bolted to the mounting base plate 4 of the roller brush assembly 3. The second mounting bracket 21 can be integrally formed by casting, injection molding, or stamping.

[0076] Optionally, the second mounting bracket 2 also includes a first hook 22, and the output end of the lifting drive assembly 6 is provided with a second hook 8. The second hook 8 is hooked and connected to the first hook 22, meaning that the output end and the second mounting bracket 2 are not rigidly locked, facilitating the assembly and disassembly of the second mounting bracket 2 and the output end. Since the first mounting bracket 11 is detachably connected to the second connecting part on the chassis 100 through the first connecting part 101, and the second mounting bracket 2 is hooked and connected to the output end of the lifting drive assembly 6, the entire roller brush module 200 can be quickly assembled and disassembled, facilitating maintenance and replacement.

[0077] Optionally, the hooking areas of the first hook 22 and the second hook 8 coincide with the center of gravity of the cleaning module in the vertical projection, that is, the direction of the force exerted by the push rod motor on the roller brush assembly 3 coincides with the center of gravity of the cleaning module, so that the lifting and lowering of the roller brush assembly 3 and the side brush module 300 is more stable.

[0078] Optionally, the first hook 22 includes a mounting portion 221 and a hook portion 222. The mounting portion 221 is connected to the mounting base plate 4 of the roller brush assembly 3, and the hook portion 222 hooks onto the second hook 8. Both the second hook 8 and the hook portion 222 are L-shaped, which facilitates hooking and provides high hooking stability. In other embodiments, the first hook 22 and the hook portion 222 may also be of other shapes, which are not limited here; for example, the second hook 8 is an inverted T-shape, and the hook portion 222 is still L-shaped and two hook portions are provided, with the two hook portions 222 hooking onto the bottom ends of the second hook 8 respectively.

[0079] Optionally, the cleaning robot also includes an elastic element 9, with its two ends connected to the first mounting frame 1 and the second mounting frame 2, respectively. The elastic element 9 applies a downward elastic force to the second mounting frame 2. When the roller brush assembly 3 descends to contact the surface to be cleaned, the weight of the roller brush assembly 3 and the second mounting frame 2 alone is insufficient to provide enough pressure on the surface to be cleaned. If the pressure is too low, the roller brush 31 will not make complete contact with the surface to be cleaned, resulting in poor cleaning performance. By applying a downward elastic force to the second mounting frame 2 through the elastic element 9, sufficient pressure is ensured between the roller brush 31 and the surface to be cleaned, thereby ensuring a good cleaning effect.

[0080] For example, the elastic element 9 is a spring, which is readily available, low in cost, and easy to install. In this embodiment, two elastic elements 9 are provided: one elastic element 9 is connected to the first mounting bracket 11 and the second mounting bracket 21 on the left, and the other elastic element 9 is connected to the first mounting bracket 11 and the second mounting bracket 21 on the right.

[0081] Optionally, the roller brush assembly 3 is slidably inserted into the mounting plate 4, so that the roller brush 31 is coaxially connected to the connecting shaft of the roller brush drive assembly 5. The roller brush assembly 3 also includes a first locking assembly 35 disposed on the flow guide shroud 32, and a corresponding first mounting hole 411 is provided on the mounting plate 4. The first locking assembly 35 has a locked state when inserted into the first mounting hole 411 and an unlocked state when disengaged from the first mounting hole 411.

[0082] Specifically, the roller brush drive assembly 5 is disposed on one side of the mounting plate 4, and the roller brush assembly 3 is slidably inserted into the bottom of the mounting plate 4 from the other side, so that the insertion end of the roller 3111 is coaxially connected with the connecting shaft of the roller brush drive assembly 5. Further, when the roller brush assembly 3 is inserted into the first mounting hole 411 of the mounting plate 4, the first locking assembly 35 is inserted into the first mounting hole 411 of the mounting plate 4, thereby locking the roller brush assembly 3 onto the mounting plate 4; the entire installation process is simple and convenient. When a new roller brush 31 needs to be replaced, the first locking assembly 35 is disengaged from the first mounting hole 411, changing from a locked state to an unlocked state, and then the roller brush assembly 3 can be pulled out from the bottom of the mounting plate 4 in the opposite direction to the insertion direction. Therefore, the installation and removal of the roller brush assembly 3 are very convenient, allowing users to operate it themselves and providing a good user experience.

[0083] Optionally, the first locking assembly 35 includes a first locking member 351 and a first elastic member, with both ends of the first elastic member connected to the first locking member 351 and the flow guide 32, respectively. Under the elastic force of the first elastic member, the first locking member 351 is inserted into the first mounting hole 411. When the roller brush assembly 3 is inserted into place, the first locking member 351 automatically inserts into the first mounting hole 411 under the elastic force of the first elastic member and remains inserted. When disassembling the roller brush assembly 3, the first locking member 351 is moved to overcome the elastic force of the first elastic member and move in a direction away from the first mounting hole 411 until it is completely disengaged from the first mounting hole 411. Exemplarily, the first elastic member is a spring.

[0084] Optionally, the mounting plate 4 is provided with a guide portion, and the flow guide 32 is slidably inserted into the mounting plate 4 along the guide portion, making the assembly operation of the roller brush assembly 3 smoother and improving the assembly accuracy of the roller brush assembly 3. In this embodiment, the guide portion includes multiple legs 412, which are spaced apart and protrude from the mounting plate 4 along the insertion direction of the flow guide 32. In addition to providing a guiding function, the legs 412 also support the roller brush assembly 3, making the installation of the roller brush assembly 3 on the mounting plate 4 more stable.

[0085] The fan module 400 includes a housing assembly, a fan, an impeller, and a duct baffle 4c. The housing assembly defines an air outlet duct and specifically includes an inlet cover 1c, a volute 2c, and an outlet cover 3c arranged sequentially. The inlet cover 1c has an inlet 11c communicating with the duct, and the outlet cover 3c has an outlet 34c communicating with the duct. The volute 2c includes an inner shell 21c, an outer shell 22c, and multiple air guide sections 23c. The outer shell 22c is spaced outside the inner shell 21c, forming a main air duct 24c between them. The air guide sections 23c connect the inner shell 21c and the outer shell 22c and are located at the inlet of the main air duct 24c. The multiple air guide sections 23c are spaced circumferentially along the volute 2c, and each air guide section 23c is inclined axially along the volute 2c. The motor is housed within the inner shell 21c. The impeller is located inside the inlet cover 1c and connected to the motor's output shaft. The duct baffle 4c is disposed between the inner shell 21c and the outer shell 22c, and is located at the outlet of the main air duct 24c. The duct baffle 4c includes an air outlet area and a non-air outlet area arranged circumferentially, and the air outlet area is provided with an air outlet hole 41c.

[0086] Specifically, the motor drives the impeller to rotate, and the impeller drives the airflow inside the air inlet cover 1c to rotate as well, thereby generating negative pressure. Under the suction effect of negative pressure, the external fluid enters the air duct through the air inlet 11c. At the same time, driven by the rotation of the impeller, the fluid inside the air inlet cover 1c flows to the volute 2c, and under the guidance of the air guide 23c, it spirals around the axis of the volute 2c in the main air duct 24c. Then, it flows into the air outlet cover 3c through the air outlet hole 41c of the air duct partition 4c, and then flows out through the air outlet 34c of the air outlet cover 3c.

[0087] Specifically, by setting an air guide 23c at the air inlet 11c of the main air duct 24c, the flow direction of the fluid is guided, causing the fluid to flow spirally within the main air duct 24c, reducing turbulence and thus lowering noise. The air duct baffle 4c is circumferentially divided into an outlet area and a non-outlet area. Fluid flowing to the outlet of the main air duct 24c can only enter the outlet cover 3c through the outlet hole 41c on the outlet area of ​​the air duct baffle 4c. Fluid flowing to the non-outlet area must continue flowing within the main air duct 24c until it flows out of the main air duct 24c through the outlet hole 41c in the outlet area. This extends the fluid flow path, reduces turbulence, and thus reduces the mutual influence between fluids, lowering noise.

[0088] Optionally, the air outlet cover 3c, the volute 2c, and the air inlet cover 1c are arranged sequentially from top to bottom. That is, the housing assembly is inverted, with the air inlet 11c located at the bottom and the air outlet 34c located at the top, allowing fluid to flow from bottom to top within the air duct. The fan module 400 also includes an air inlet pipe 5c and an air outlet pipe 6c. The air inlet pipe 5c is vertically arranged, with its lower port connected to the air inlet 11c on the air inlet cover 1c, and its upper port connected to the suction chamber of the squeegee via a first transfer pipe. The air outlet pipe 6c is also vertically arranged, with its upper port connected to the air outlet 34c on the air outlet cover 3c, and its lower port connected to the wastewater tank via a second transfer pipe. The fluid drawn in by the suction chamber of the self-priming squeegee flows from top to bottom in the inlet duct 5c to the inlet 11c of the inlet cover 1c, then flows from bottom to top in the air duct to the outlet 34c of the outlet cover 3c, and finally flows from top to bottom in the outlet duct 6c. By inverting the housing assembly and vertically oriented both the inlet duct 5c and the outlet duct 6c, the fluid flow path is further extended, thereby reducing turbulence and noise. Furthermore, the fluid flowing from top to bottom through the air duct also reduces damage to the motor and extends the service life of the fan module 400.

[0089] Optionally, the air inlet 11c is tangential to the inner wall of the air inlet cover 1c. The fluid enters the air inlet cover 1c tangentially from the air inlet 11c and flows circumferentially along the inner wall of the air inlet cover 1c. The long flow path reduces the generation of turbulence within the air inlet cover 1c. Similarly, the air outlet 34c is tangential to the inner wall of the air outlet cover 3c. The fluid flows circumferentially along the inner wall of the air outlet cover 3c. The long flow path results in the fluid ultimately flowing tangentially out of the air outlet cover 3c, further reducing the generation of turbulence within the air outlet cover 3c.

[0090] Optionally, the fan module 400 further includes a first silencer 7c and a second silencer 8c. The first silencer 7c is disposed between the inlet of the main air duct 24c and the air inlet cover 1c, and is fitted over the impeller. When the fluid rotates at high speed driven by the impeller, the flow direction changes as the accelerated fluid enters the inlet of the main air duct 24c. This intensifies the impact between fluid particles and the impact between the fluid and the inner wall of the main air duct 24c, thereby generating noise. By providing the first silencer 7c, the impact between the flow fields and the impact between the fluid and the inner wall of the duct are buffered, thereby reducing the noise at the inlet of the main air duct 24c and reducing the propagation of noise to the outside. The second silencer 8c is disposed in the main air duct 24c, located between the air guide section 23c and the duct partition 4c. The fluid flows spirally within the main air duct 24c. Since the main air duct 24c has a large space, turbulence is inevitable. By installing a second silencing component 8c, the impact between fluids and the impact between the fluid and the inner wall of the main air duct 24c are buffered, thereby reducing the noise within the main air duct 24c and reducing the transmission of noise to the outside.

[0091] Optionally, the fan module 400 further includes a third silencing component 9c, which is disposed between the duct baffle 4c and the air outlet cover 3c. When the fluid flows from the duct baffle 4c to the air outlet cover 3c, the flow direction changes to a certain extent. The third silencing component 9c buffers the impact between fluids and the impact between the fluid and the inner wall of the air outlet cover 3c, thereby reducing the noise inside the air outlet cover 3c and reducing the transmission of noise to the outside.

[0092] Optionally, the inner shell 21c is provided with a first heat dissipation hole 211c, and the outer shell 22c is provided with a corresponding second heat dissipation hole 221c. Two first stop plates 25c and two second stop plates 26c are provided between the inner shell 21c and the outer shell 22c. The two first stop plates 25c are axially located at both ends of the first heat dissipation hole 211c and the second heat dissipation hole 221c; the two second stop plates 26c are circumferentially located at both ends of the first heat dissipation hole 211c and the second heat dissipation hole 221c; the two first stop plates 25c and the two second stop plates 26c form a heat dissipation cavity 29c that is separated from the main air duct 24c; a fourth silencing component 27c is inserted into the heat dissipation cavity 29c, and a noise reduction cover plate 28c covering the second heat dissipation hole 221c is provided on the outside of the outer shell 22c. When the motor is working, it generates a lot of heat and noise. Some of the heat is dissipated to the outside through the heat dissipation cavity 29c to prevent the motor from overheating and being damaged. At the same time, the heat dissipation cavity 29c is also a good noise transmission channel. By inserting a fourth silencer 27c into the heat dissipation cavity 29c, heat dissipation is ensured while noise transmission to the outside is reduced. By setting a noise reduction cover 28c, the transmission of noise to the outside is further reduced, and at the same time, it protects the fourth silencer 27c from external impurities adhering to it.

[0093] For example, the first silencing component 7c, the second silencing component 8c, the third silencing component 9c and the fourth silencing component 27c are sound-absorbing cotton made of polyester material, or various types of porous materials such as felt, chemical fiber felt, metal felt, and metal mesh.

[0094] Optionally, a first seal 10c is provided between the motor and the end of the inner shell 21c near the inlet of the main air duct 24c to prevent fluid from entering the inner shell 21c from the end near the inlet of the main air duct 24c. The air outlet cover 3c includes an inner cylinder 31c, an outer cylinder 32c, and a fourth connecting part 33c. One end of the inner cylinder 31c is circumferentially connected to the inner shell 21c, and one end of the outer cylinder 32c is circumferentially connected to the outer shell 22c. The fourth connecting part 33c connects the other ends of the inner cylinder 31c and the outer cylinder 32c. A second seal is provided at the connection between the inner cylinder 31c and the inner shell 21c to prevent fluid from entering the inner shell 21c from the end near the outlet of the main air duct 24c. The first seal 10c and the second seal work together to improve the waterproof performance of the inner shell 21c and prevent fluid from entering the inner shell 21c and damaging the motor. Exemplarily, the first seal 10c includes a first sealing ring. The second seal includes a second sealing ring. The first sealing ring includes a first end and a second end that are axially opposite each other. The first end is located at the end of the inner shell 21c near the inlet of the main air duct 24c. The outer ring of the first end is tightly fitted with the inner shell 21c, and the inner ring of the first end is tightly fitted with the motor to achieve a seal. There is a gap between the axial center of the first sealing ring and the outer wall of the motor, and a buffer member 20c is filled between the two to prevent excessive shaking of the motor during operation. For example, the buffer member 20c is annular.

Claims

1. A cleaning robot, characterized in that, The system includes a chassis (100), a squeegee, a wastewater tank, and a blower module (400). The blower module (400) is used to create negative pressure inside the wastewater tank to collect wastewater from the squeegee. The chassis (100) is also equipped with a cleaning module, which includes a roller brush module (200) and a side brush module (300) mounted on the roller brush module (200). The roller brush module (200) includes: The mounting bracket unit includes a first mounting bracket (1), a second mounting bracket (2), and a linkage assembly (7). The first mounting bracket (1) is connected to the chassis (100). The second mounting bracket (2) is connected to the first mounting bracket (1) through the linkage assembly (7). The roller brush unit includes a mounting plate (4), a roller brush assembly (3), and a roller brush drive assembly (5). The mounting plate (4) is connected to the second mounting bracket (2). The roller brush assembly (3) is disposed at the bottom of the mounting plate (4). The roller brush drive assembly (5) and the side brush module (300) are disposed at the left and right ends of the mounting plate (4). The lifting drive assembly (6) has its output end connected to the second mounting bracket (2); The linkage assembly (7) includes: Two parallel first connecting arms (71) of equal length, the two ends of the first connecting arms (71) being hinged to the first mounting bracket (1) and the second mounting bracket (2) respectively. The second connecting arm (72) is hinged at both ends to the first mounting bracket (1) and the second mounting bracket (2) respectively, and the second connecting arm (72) is parallel to the plane where the two first connecting arms (71) are located; The linkage assembly (7) is provided in two sets, and the two sets of linkage assemblies (7) are symmetrically arranged with the reference plane as the plane of symmetry. The reference plane passes through the center of gravity of the cleaning module. The second mounting bracket (2) includes a first hook (22), and the output end of the lifting drive assembly (6) is provided with a second hook (8), which is hooked and connected to the first hook (22) in an up-down manner; The hooking areas of the first hook (22) and the second hook (8) coincide with the center of gravity of the cleaning module in the vertical projection.

2. The cleaning robot according to claim 1, characterized in that, The chassis (100) includes a first connecting part (101) and a first guide part; The first mounting bracket (1) includes a second connecting part and a second guide part, the second guide part is slidably inserted into the first guide part, and the second connecting part is detachably connected to the first connecting part (101).

3. The cleaning robot according to claim 1, characterized in that, The roller brush assembly (3) is slidably inserted into the bottom of the mounting base plate (4) for transmission connection with the roller brush drive assembly (5); The mounting base plate (4) is provided with a first mounting hole (411), and the roller brush assembly (3) is provided with a first locking assembly (35); the first locking assembly (35) has a locking state when inserted into the first mounting hole (411) and an unlocking state when disengaged from the first mounting hole (411).

4. The cleaning robot according to any one of claims 1-3, characterized in that, The fan module (400) includes: A housing assembly, which internally defines an air outlet duct, includes an air inlet cover (1c), a volute (2c), and an air outlet cover (3c) arranged sequentially. The air inlet cover (1c) is provided with an air inlet (11c) communicating with the air outlet duct, and the air outlet cover (3c) is provided with an air outlet (34c) communicating with the air outlet duct. The volute (2c) includes an inner shell (21c), an outer shell (22c), and a plurality of air guides (23c). The outer shell (22c) is spaced outside the inner shell (21c), and the two form a main air outlet duct (24c). The air guides (23c) are connected between the inner shell (21c) and the outer shell (22c) and are located at the inlet of the main air outlet duct (24c). The plurality of air guides (23c) are arranged circumferentially around the volute (2c), and each air guide (23c) is inclined along the axial direction of the volute (2c). The motor is housed within the inner casing (21c); An impeller is disposed on the inner side of the air inlet cover (1c), and the impeller is connected to the output shaft of the motor; A duct partition (4c) is disposed between the inner shell (21c) and the outer shell (22c) and located at the outlet of the main air duct (24c). The duct partition (4c) includes an air outlet area and a non-air outlet area arranged circumferentially. The air outlet area is provided with an air outlet hole (41c).

5. The cleaning robot according to claim 4, characterized in that, The air outlet cover (3c), the volute (2c), and the air inlet cover (1c) are arranged sequentially from top to bottom.

6. The cleaning robot according to claim 5, characterized in that, The fan module also includes: An air inlet duct (5c) is arranged vertically. The lower end of the air inlet duct (5c) is connected to the air inlet (11c) on the air inlet cover (1c). The upper end of the air inlet duct (5c) is used to connect to the water suction chamber of the squeegee through the first transfer duct. An air outlet duct (6c) is provided, which is arranged vertically. The upper port of the air outlet duct (6c) is connected to the air outlet (34c) on the air outlet cover (3c), and the lower port of the air outlet duct (6c) is used to connect to the sewage tank through a second transfer duct.

7. The cleaning robot according to claim 6, characterized in that, The air inlet (11c) is tangent to the inner wall of the air inlet cover (1c); the air outlet (34c) is tangent to the inner wall of the air outlet cover (3c).

8. The cleaning robot according to claim 4, characterized in that, Also includes: The first silencer (7c) is disposed between the inlet of the main air duct (24c) and the air inlet cover (1c), and is sleeved on the outside of the impeller; The second silencer (8c) is disposed in the main air duct (24c) and located between the air guide (23c) and the air duct partition (4c).

9. The cleaning robot according to claim 8, characterized in that, It also includes a third silencing component (9c), which is disposed between the air duct partition (4c) and the air outlet cover (3c).

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