A cleaning apparatus

Abstract

The present disclosure relates to a cleaning device, comprising a machine body, a rolling brush, a driving device and a fan assembly, the rolling brush rotates around its axis to clean a cleaning surface, the rolling brush has an inner cavity; the driving device is connected to the machine body and has a heat dissipation air duct; the driving device is configured to extend into the inner cavity of the rolling brush and drive together with the rolling brush; the heat dissipation air duct of the driving device communicates with the inner cavity of the rolling brush and constitutes a flow-through air duct; the fan assembly is arranged in the flow-through air duct and is configured to rotate synchronously with the rolling brush to form negative pressure in the flow-through air duct. The cleaning device of the present disclosure can generate negative pressure when the rolling brush starts to rotate, and can draw external air into the flow-through air duct, so as to timely discharge the heat generated by the driving device when the driving device is running at high power, increase the service life of the driving device, and reduce the failure rate.

Description

Technical Field

[0001] This disclosure relates to the field of cleaning technology, and in particular to a cleaning device. Background Technology

[0002] With the development of social productivity, people's living standards have also improved. With their material foundation guaranteed, people have begun to use various tools to reduce labor and improve their quality of life, leading to the emergence of household cleaning equipment such as floor scrubbers and robot vacuum cleaners.

[0003] Currently, most floor scrubbers on the market have their motors located outside the roller brush, with the motor's torque transmitted to the brush via a transmission unit. This installation structure is relatively complex and occupies a large amount of space. To solve this problem, an internal motor mounting method can be adopted, where the motor extends into the inner cavity of the roller brush, thus saving installation space. While placing the motor inside the roller brush saves installation space, it makes heat dissipation more difficult. When the motor operates at high power, it generates a lot of heat. If this heat cannot be dissipated in time, it will affect the motor's performance and lifespan. Summary of the Invention

[0004] This disclosure provides a cleaning device to address the problems existing in the prior art.

[0005] According to a first aspect of this disclosure, a cleaning device is provided, comprising:

[0006] Organism;

[0007] A roller brush that rotates about its axis to clean a surface, the roller brush having an inner cavity;

[0008] A drive unit is connected to the body and has a heat dissipation duct; the drive unit is configured to extend into the inner cavity of the roller brush and drively engage with the roller brush; the heat dissipation duct of the drive unit communicates with the inner cavity of the roller brush and forms a flow channel.

[0009] A fan assembly disposed in the airflow duct and configured to rotate synchronously with the roller brush to create a negative pressure in the airflow duct.

[0010] In one embodiment of this disclosure, the roller brush is a cleaning roller with its rotation axis parallel to the working surface, and the inner cavity extends through the first and second ends of the cleaning roller; the driving device extends from the first end of the cleaning roller into the inner cavity of the cleaning roller and is connected to the cleaning roller in a driving connection; the second end of the cleaning roller is rotatably connected to the machine body.

[0011] In one embodiment of this disclosure, external airflow is configured to enter the inner cavity from the second end of the cleaning roller, flow through the heat dissipation duct, and then exit.

[0012] In one embodiment of this disclosure, the fan assembly includes a first fan disposed at a second end of the cleaning roller, the first fan being configured to rotate synchronously with the cleaning roller to create a negative pressure in the airflow duct.

[0013] In one embodiment of this disclosure, the first fan includes a cylindrical base configured to be fixed to a second end of the cleaning roller; a mounting seat is provided in the hollow cavity of the base, the mounting seat being configured to be rotatably connected to the body; and blades are disposed between the mounting seat and the base.

[0014] In one embodiment of this disclosure, the output end of the drive device is provided with a coupling, and a transmission seat is provided in the inner cavity of the cleaning roller; the coupling is configured to be connected to the transmission seat in a pluggable manner.

[0015] In one embodiment of this disclosure, the fan assembly includes blades disposed on the drive seat; the blades are configured to create a negative pressure in the inner cavity as the cleaning roller rotates.

[0016] In one embodiment of this disclosure, the transmission seat has a transmission cavity facing the coupling, the coupling being configured to have a shape adapted to the transmission cavity; and a channel for airflow is provided on the transmission seat.

[0017] In one embodiment of this disclosure, the drive device is provided with an air inlet and a seal for sealing the air inlet; the seal is configured to: open the air inlet under the compression of the transmission seat when the drive device is assembled with the roller brush to connect the heat dissipation duct and the inner cavity; and seal the air inlet under elastic restoring force when the drive device is disengaged from the roller brush.

[0018] In one embodiment of this disclosure, the drive device includes a gearbox, a coupling disposed at the output end of the gearbox, the coupling being configured to move along the axial direction of the gearbox between a first position and a second position; a seal is fixed to the coupling, the coupling being configured to move from the first position to the second position under the pressure of a transmission seat, such that the seal opens the air inlet, connecting the heat dissipation duct to the inner cavity; or,

[0019] The drive unit includes a gearbox, the coupling is disposed at the output end of the gearbox, and the seal is fixed to the coupling; the seal is configured to deform under the pressure of the transmission seat to open the air inlet and connect the heat dissipation duct with the inner cavity.

[0020] In one embodiment of this disclosure, the driving device includes a drive motor, and the gearbox is fixed to one end of the drive motor; the driving device also includes a housing, which is fitted over the drive motor and the gearbox; the airflow in the inner cavity is configured to enter the gap between the housing and the gearbox through the air inlet, and then enter the heat dissipation duct of the drive motor.

[0021] In one embodiment of this disclosure, the gearbox includes a housing and a mounting cavity disposed at the open end of the housing; the air inlet passes through the inner wall of the mounting cavity; an axially extending guide cavity is also disposed on the outer wall of the housing; the airflow from the air inlet is configured to flow into the heat dissipation duct of the drive motor through the guide cavity.

[0022] In one embodiment of this disclosure, a sealing ring is provided between the housing and the drive motor, and the airflow flowing through the gap between the housing and the gearbox is configured to enter the heat dissipation duct of the drive motor from an inlet provided on the drive motor.

[0023] In one embodiment of this disclosure, the fan assembly includes a second fan fixed to the end of the drive motor away from the gearbox.

[0024] In one embodiment of this disclosure, a motor mounting base fixed to the body is further included, the housing is mounted on the motor mounting base, and the second fan is located in a cavity between the housing and the motor mounting base; the drive motor is provided with an outlet communicating with a heat dissipation duct, and the airflow flowing out from the outlet is configured to flow out through the motor mounting base.

[0025] The cleaning device disclosed herein includes a fan assembly housed within the inner cavity of a roller brush, and airflow channels are provided in both the drive unit and the roller brush. When the roller brush begins to rotate, the fan assembly rotates accordingly, generating negative pressure to draw external airflow into the airflow channels. This enhances gas flow within the inner cavity of the roller brush, dissipating heat from the drive unit. This effectively removes heat generated by the drive unit during high-power operation, increasing its lifespan and reducing the failure rate.

[0026] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0028] Figure 1 This is a schematic diagram of the overall structure of the cleaning equipment disclosed herein;

[0029] Figure 2 This is a schematic diagram of the exploded structure of the cleaning equipment disclosed herein;

[0030] Figure 3 This is a cross-sectional schematic diagram of the cleaning equipment disclosed herein;

[0031] Figure 4 This is a schematic diagram of the exploded structure of the cleaning equipment disclosed in this publication from another angle;

[0032] Figure 5 This is a schematic diagram of the coupling in the cleaning equipment disclosed herein;

[0033] Figure 6 This is a schematic diagram of the structure of the first fan in the cleaning equipment disclosed herein;

[0034] Figure 7 This is a schematic diagram of the drive motor in the cleaning equipment disclosed herein;

[0035] Figure 8 This is a first state diagram of the coupling in one embodiment of the cleaning equipment disclosed herein;

[0036] Figure 9 This is a second state diagram of the coupling in one embodiment of the cleaning equipment disclosed herein;

[0037] Figure 10 This is a first state diagram of the coupling and transmission seat in another embodiment of the cleaning equipment disclosed herein;

[0038] Figure 11 This is a second state diagram of the coupling in another embodiment of the cleaning equipment disclosed herein.

[0039] Figure label:

[0040] 1. Machine body; 11. Motor mounting base; 2. Cleaning roller; 20. Inner cavity; 21. Transmission seat; 22. Transmission chamber; 23. Extrusion section; 30. Heat dissipation duct; 301. Air inlet; 302. Guide cavity; 31. Gearbox; 310. Housing; 311. Output shaft; 312. Mounting cavity; 32. Coupling; 33. Drive motor; 331. Motor air inlet; 332. Motor air outlet; 34. Outer shell; 35. Sealing ring; 4. Seal; 5. Elastic device; 6. First fan; 61. Base; 62. Mounting base; 7. Second fan; 8. Airflow duct. Detailed Implementation

[0041] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0042] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0043] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0044] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0046] This disclosure provides a cleaning device, which can be a cleaning device well known to those skilled in the art, such as a sweeping robot, a floor scrubbing robot, or a handheld floor scrubber. It includes a body, on which a roller brush for cleaning surfaces is mounted, and a drive device that is connected to and drives the roller brush. The roller brush has an inner cavity. One end of the drive device is fixedly connected to the body, and the other end extends into the inner cavity of the roller brush and is connected to it, thereby enabling it to drive the roller brush.

[0047] The drive unit includes a heat dissipation duct that communicates with the inner cavity of the roller brush, forming a flow channel together. A fan assembly, such as a fan or blower, is installed within this flow channel. The fan assembly rotates synchronously with the roller brush, generating negative pressure that draws in external airflow into the flow channel. This external airflow then flows along the flow channel into the heat dissipation duct within the flow channel, cooling the interior of the drive unit before exiting from the outlet of the heat dissipation duct.

[0048] The cleaning device disclosed herein incorporates a fan assembly within the inner cavity of the roller brush. During operation, the fan assembly rotates with the cleaning device, generating negative pressure that draws external airflow into a ventilation duct. This external airflow first passes through the inner cavity of the roller brush within the ventilation duct before entering the heat dissipation duct, thus cooling the drive unit. This effectively dissipates heat generated by the drive unit during high-power operation, increasing its lifespan and reducing the failure rate.

[0049] For ease of understanding, please refer to the attached diagram below. Figures 1 to 11 The specific structure and working principle of this disclosure will be described in detail with reference to specific embodiments.

[0050] In one embodiment of this disclosure, such as Figure 1 and Figure 3 As shown, the cleaning equipment includes a body 1, which carries various components of the cleaning equipment, such as batteries, dust collection boxes, wastewater tanks, and other components well-known to those skilled in the art. The specific components depend on the structure and function of the cleaning equipment, and this disclosure does not limit their specific features. A roller brush is mounted on the body 1 for cleaning the surface to be cleaned. The roller brush has an inner cavity 20. A drive device is also mounted on the body 1 to drive the roller brush to rotate. One end of the drive device is connected to the body 1, and the other end extends into the inner cavity 20 of the roller brush and is connected to the roller brush in a transmission manner. The transmission connection can be a snap-fit, bevel gear connection, or other methods well-known to those skilled in the art, and will not be described in detail here.

[0051] A heat dissipation duct 30 is provided in the drive device, which communicates with the inner cavity 20 of the roller brush and together they form a flow channel 8. A fan assembly is provided in the flow channel 8. The fan assembly can be an axial fan, blower, or other fan assembly known to those skilled in the art, and this disclosure does not limit it. The fan assembly rotates synchronously with the roller brush when it is working. During the rotation with the roller brush, a negative pressure is generated, which is used to draw external airflow into the flow channel 8. The external airflow first enters the inner cavity 20 of the roller brush in the flow channel 8, and then enters the heat dissipation duct 30 to cool the drive device. Furthermore, when the drive device operates at a higher power, the roller brush rotates faster, and the fan assembly can also rotate faster with the roller brush, making the airflow in the flow channel 8 more rapid and the heat dissipation effect better.

[0052] In one specific embodiment of this disclosure, such as Figure 1 As shown, the roller brush can be a cylindrical cleaning roller 2, with its rotation axis parallel to the working surface. The inner cavity 20 of the cleaning roller 2 extends through its opposite first and second ends. Cleaning cotton, bristles, or other cleaning components can be provided on the outer surface of the cleaning roller 2.

[0053] The second end of the cleaning roller 2 is rotatably connected to the machine body 1, allowing the machine body 1 to provide support for the second end of the cleaning roller 2. One end of the drive device is connected to the machine body 1, and the other end extends through the first end of the cleaning roller 2 into the inner cavity 20 of the cleaning roller 2, and is drivenly connected to the cleaning roller 2, thereby allowing the drive device to provide support for the cleaning roller 2. Furthermore, by rotating the output end of the drive device, the cleaning roller 2 can be driven to rotate relative to the machine body 1 to complete the cleaning of the surface.

[0054] In one embodiment of this disclosure, such as Figure 2 As shown, the fan assembly includes a first fan 6, which can be an axial fan, centrifugal fan, or other fan known to those skilled in the art, and this disclosure does not limit this. The first fan 6 is disposed at the second end of the cleaning roller 2 and is fixedly connected to the second end of the cleaning roller 2. When the cleaning roller 2 starts working, the first fan 6 rotates synchronously with the cleaning roller 2, thereby generating negative pressure and attracting external airflow into the inner cavity 20 of the cleaning roller 2. External airflow can enter the inner cavity 20 of the cleaning roller 2 through the gap between the first fan 6 and the second end of the cleaning roller 2. Alternatively, a gap can be provided on the first fan 6 to allow external airflow to enter the inner cavity 20 of the cleaning roller 2 through the gap on the first fan 6, and this disclosure does not limit this.

[0055] In one specific embodiment of this disclosure, such as Figure 2 and Figure 3 , Figure 6 As shown, the first fan 6 consists of a base 61, a mounting base 62, and blades located between the base 61 and the mounting base 62. The base 61 is hollow and cylindrical in shape. The first fan 6 can be fixedly connected to the second end of the cleaning roller 2 via the base 61. The fixing method can be snap-fit, adhesive, integral molding, screw fixing, or other connection methods known to those skilled in the art, which will not be described in detail here. The mounting base 62 is located in the cavity of the base 61 and is connected to the base 61 via the blades. The first fan 6 is rotatably connected to the machine body 1 via the mounting base 62. For example, the mounting base 62 can be provided with mounting holes, and the machine body 1 can be provided with mounting shafts that mate with the mounting holes. When the first fan 6 is installed on the machine body 1, the mounting holes and the mounting shaft mate with each other, so that the first fan 6 is rotatably connected to the machine body 1.

[0056] When the cleaning roller 2 starts working, it begins to rotate under the drive of the drive device, which in turn drives the base 61 fixedly connected to it to rotate. The blades rotate synchronously with the base 61. During the rotation of the blades, negative pressure is generated, which allows external airflow to enter the airflow duct 8 to dissipate heat from the drive device.

[0057] In one embodiment of this invention, such as Figure 2and Figure 6 As shown, a coupling 32 is provided at the drive end of the drive device. The drive device is connected to the cleaning roller 2 via the coupling 32. The transmission connection method includes, but is not limited to, bolt fixing, bonding, plug fitting, snap-fit ​​connection, etc., and this disclosure does not limit this. To facilitate the installation and disassembly of the cleaning roller 2, a transmission seat 21 is provided in the cleaning roller 2, which is connected to the coupling 32. The transmission seat 21 is located in the inner cavity 20 of the cleaning roller 2 and is detachably connected to the cleaning roller 2. The drive device can drive the transmission seat 21 to rotate through the coupling 32, thereby driving the cleaning roller 2 to rotate synchronously.

[0058] In one specific embodiment of this disclosure, see [link to specific embodiment]. Figure 5 The coupling 32 is fixedly connected to the output shaft 311 in the drive device. The coupling 32 can be a frustum structure or other shapes well known to those skilled in the art. The coupling 32 and the output shaft 311 can be fixedly connected by bolts or other methods well known to those skilled in the art, thereby driving the coupling 32 to rotate by rotating the output shaft 311. See also... Figure 2 A transmission cavity 22 is provided in the transmission seat 21. The shape of the transmission cavity 22 is adapted to the shape of the coupling 32. The coupling 32 and the transmission seat 21 can be engaged together by plugging and unplugging.

[0059] During installation, the cleaning roller 2 can be held and moved towards the drive unit, allowing the drive unit to enter the inner cavity 20 of the cleaning roller 2, and the coupling 32 to be inserted into the transmission cavity 22 in the transmission seat 21, so that the transmission cavity 22 and the coupling 32 are engaged in transmission. When disassembly is required, simply pull the cleaning roller 2 away from the drive unit to detach it from the drive unit.

[0060] The transmission cavity 22 and the coupling 32 can also be connected by protrusions, grooves, or other means to prevent slippage between them. In one embodiment of this disclosure, such as... Figure 2 As shown, a spiral protrusion structure can be provided on the coupling 32. After the spiral protrusion structure cooperates with the corresponding groove structure provided on the inner wall of the transmission cavity 22, the transmission cavity 22 and the coupling 32 can be driven together, so as to avoid slippage between the transmission cavity 22 and the coupling 32 during the operation of the cleaning roller 2 and ensure the stability of the cleaning roller 2 when rotating.

[0061] In practical applications, generating negative pressure solely through the rotation of the first fan 6 may result in insufficient power for the external airflow during its flow through the ventilation duct 8. When the airflow reaches the middle of the inner cavity 20 of the cleaning roller 2, a certain distance has been created between the airflow and the first fan 6, reducing the impact of the negative pressure generated by the first fan 6 on the airflow. This causes the airflow to flow at a slower speed within the inner cavity 20, thus reducing heat dissipation efficiency. To address the above problem, in one embodiment of this disclosure, such as... Figure 6 As shown, the fan assembly also includes multiple blades located in the drive base 21, each with a gap between it to allow airflow. The drive base 21 also has a channel for airflow. When the coupling 32 drives the drive base 21 to rotate, the blades rotate synchronously with the drive base 21. During the rotation of the blades, a negative pressure is generated, and the airflow is accelerated again when passing through the blades, thus continuing to flow at high speed in the airflow channel 8, improving heat dissipation efficiency.

[0062] To further increase the airflow velocity in the ventilation duct 8 and improve heat dissipation efficiency, in one embodiment of this disclosure, see [link to relevant documentation]. Figure 4 A second fan 7 is installed at the outlet of the heat dissipation duct 30, located at the end of the drive unit away from the transmission base 21. The second fan 7 can be an axial fan, a centrifugal fan, or other fans known to those skilled in the art, and will not be described in detail here. The second fan 7 can be connected to the drive unit for transmission, and the drive unit provides power for the rotation of the second fan 7. When the drive unit starts working, it synchronously drives the first fan 6, the second fan 7, and the blades in the transmission base 21 to rotate, so that the external airflow entering the airflow duct 8 can be accelerated when it first enters the airflow duct 8, enters the middle of the airflow duct 8, and flows out of the airflow duct 8, which greatly improves the heat dissipation efficiency.

[0063] Of course, the second fan 7 can also be a fan with its own power unit, which can rotate when needed. For example, when the drive unit operates at a lower power, the heat dissipation pressure is low, and the second fan 7 can remain stationary, allowing airflow to exit the cleaning roller 2 normally. When the drive unit operates at a higher power, the second fan 7 starts to rotate, increasing the gas flow rate in the airflow duct 8, allowing the airflow to exit the airflow duct 8 more quickly and improving heat dissipation efficiency.

[0064] In practical applications, as users continuously use the cleaning equipment, the cleaning layer on the surface of the cleaning roller 2 may wear down and need to be replaced. In this case, the user removes the cleaning roller 2 for replacement. Alternatively, when the cleaning roller 2 is particularly dirty, it can also be disassembled for cleaning. During replacement or rinsing, water may enter the drive unit through the cooling duct 30, potentially causing malfunctions and reducing its lifespan.

[0065] To address the aforementioned problems, in one embodiment of this disclosure, such as Figure 4 , Figure 8 As shown, the drive unit is equipped with an air inlet 301, which is the inlet of the heat dissipation duct 30, and a sealing element 4 for sealing the air inlet 301. The sealing element 4 can be made of a flexible material, such as rubber or sponge, and this disclosure does not limit this. When the cleaning roller 2 is driven and engaged with the drive unit, the sealing element 4, under the pressure of the transmission seat 21 in the cleaning roller 2, opens the air inlet 301, allowing the heat dissipation duct 30 to connect with the inner cavity 20 of the cleaning roller 2, and the external airflow can flow normally. When the user removes the cleaning roller 2, the sealing element 4, under the action of elastic restoring force, seals the air inlet 301 on the drive unit, preventing external moisture from entering the interior of the drive unit through the air inlet 301, causing malfunctions during operation and reducing the service life of the drive unit.

[0066] In one specific embodiment of this disclosure, such as Figure 3 and Figure 4 As shown, the drive unit includes a reduction gearbox 31, which can house gears and other speed-changing components. An air inlet 301 is located at one end of the reduction gearbox 31 near the coupling 32. Multiple air inlets 301 can be provided, arranged at intervals along the circumference of the reduction gearbox 31. The coupling 32 can move along the axial direction of the reduction gearbox 31 between a first position and a second position. A seal 4 is located at one end of the coupling 32 near the reduction gearbox 31 and is fixedly connected to the coupling 32. The seal 4 is arranged circumferentially around the coupling 32 and extends radially outward to seal the air inlets 301 located on the reduction gearbox 31. The seal 4 is configured to close the air inlets 301 when the coupling 32 is in the first position and open the air inlets 301 when the coupling 32 is in the second position.

[0067] Coupling 32 is initially in the first position, see [reference]. Figure 8 At this time, seal 4 closes the air inlet 301. After coupling 32 engages with cleaning roller 2, see... Figure 9 The cleaning roller 2 presses the coupling 32 along the axial direction of the coupling 32 to move the coupling 32 from the first position to the second position, and the seal 4 follows the movement of the coupling 32 to open the air inlet 301.

[0068] In one embodiment of this disclosure, see Figure 4 and Figure 5 An elastic device 5 is provided between the output shaft 311 of the gearbox 31 and the coupling 32. The elastic device 5 is configured to pre-press the coupling 32 into a first position. When the transmission seat 21 in the cleaning roller 2 presses against the coupling 32, it can overcome the elastic force of the elastic device 5, causing the coupling 32 to move from the first position to the second position along the output shaft 311 of the gearbox 31. This allows the seal 4 to open the air inlet 301, enabling the drive device to rotate the cleaning roller 2 via the coupling 32 for cleaning. During the cleaning process, the cooling duct 30 of the drive device can dissipate heat through the air inlet 301. When the cleaning roller 2 disengages from the coupling 32, the elastic device 5 can drive the coupling 32 from the second position to the first position under its own elastic restoring force, causing the seal 4 to close the air inlet 301 and preventing water from entering the cooling duct 30 of the drive device through the air inlet 301.

[0069] The elastic device 5 includes, but is not limited to, compression springs, sheet metal, elastic blocks, etc. In a preferred embodiment, such as... Figure 5 , Figure 6 As shown, the elastic device 5 uses a compression spring, which is sleeved on the output shaft 311 of the gearbox 31. One end of the compression spring is engaged with the output shaft 311 or the housing 310, and the other end is engaged with the coupling 32.

[0070] In another specific embodiment of this disclosure, the coupling 32 and the gearbox 31 are fixedly connected together. An air inlet 301 is located at one end of the gearbox 31 near the coupling 32. A seal 4 is located at one end of the coupling 32 near the gearbox 31. When the drive unit is not engaged with the cleaning roller 2, see [reference needed]. Figure 10 The portion of seal 4 extending radially along coupling 32 seals the air inlet 301. A pressing portion 23 is provided at one end of the drive seat 21 in cleaning roller 2 near coupling 32. The pressing portion 23 can be arranged circumferentially along the drive seat 21 and extends axially towards coupling 32 along the drive seat 21. When the drive unit is engaged with cleaning roller 2, see... Figure 11 The extrusion section 23 compresses the portion of the seal 4 extending radially outward along the coupling 32, deforming the seal 4 and opening the air inlet 301. This connects the inner cavity 20 of the cleaning roller 2 with the heat dissipation duct 30 in the drive unit, allowing external airflow to dissipate heat from the drive unit through the airflow duct 8. Because the seal 4 has a certain degree of elasticity, when the drive unit disengages from the cleaning roller 2, the seal 4 can seal the air inlet 301 through its own elastic restoring force.

[0071] In one embodiment of this disclosure, such as Figure 4and Figure 5 As shown, the gearbox 31 includes a housing 310, which is a hollow cylinder. The hollow portion is used to install the transmission components inside the gearbox 31, such as gears and transmission shafts. A mounting cavity 312 is provided at one end of the housing 310 near the coupling 32, with the end of the mounting cavity 312 facing the transmission seat 21 being an open end. An air inlet 301 is located on the inner wall of the mounting cavity 312. When the coupling 32 is installed with the gearbox 31, part of the coupling 32 and the seal 4 are located in the mounting cavity 312. A guide cavity 302 is also provided on the outer wall of the housing 310, communicating with the air inlet 301. External airflow enters the mounting cavity 312 through the open end, then enters the guide cavity 302 through the air inlet 301, and continues to flow towards the end of the drive unit. Multiple air inlets 302 can be provided and distributed at intervals along the circumference of the housing 310. Multiple air inlets 301 can also be provided and correspond one-to-one with the air inlets 302, so that airflow can flow out of the housing 310 in multiple directions.

[0072] In one embodiment of this disclosure, such as Figure 3 and Figure 7 As shown, the drive unit also includes a drive motor 33, the drive end of which is connected to the end of the gearbox 31 away from the coupling 32. A motor air inlet 331 is provided at the end of the drive motor 33 near the gearbox 31, and a motor air outlet 332 is provided at the end away from the gearbox 31. The motor air inlet 331 and the motor air outlet 332 form part of the heat dissipation channel 30. After passing through the gearbox 31, the airflow enters the drive motor 33 through the motor air inlet 331, carrying away the internal heat of the drive motor 33. Then, the airflow flows out through the motor air outlet 332, passes through the second fan 7 at the end of the drive motor 33, and exits the heat dissipation channel 30.

[0073] In one embodiment of this disclosure, a housing 34 is further provided on the outer surface of the drive motor 33. The housing 34 is cylindrical in shape and is fitted onto the drive motor 33 and the gearbox 31, and fixedly connected thereto. The gap between the housing 34 and the gearbox 31 together constitutes part of the heat dissipation duct 30. Gas flowing out from the mounting cavity 312 will flow towards the drive motor 33 under the constraint of the housing 34 and the guide cavity 302, and enter the heat dissipation duct 30 through the air inlet 301.

[0074] In one embodiment of this disclosure, gaps exist between the housing 34 and the drive motor 33 and the gearbox 31. To prevent airflow in the heat dissipation duct 30 from flowing directly from the gap between the drive motor 33 and the housing 34 to the second fan 7, a sealing ring 35 is provided between the housing 34 and the drive motor 33. (See reference...) Figure 3The sealing ring 35 can be set at one end near the motor air inlet 331 of the drive motor 33, so that the airflow can only enter the drive motor 33 through the motor air inlet 331 first, then flow out through the motor air outlet 332, and finally enter the gap between the drive motor 33 and the housing 34, and flow to the second fan 7.

[0075] The outer casing 34 also provides some protection for the gearbox 31 and the drive motor 33. When the user removes the cleaning roller 2, the outer casing 34 and the seal 4 prevent external moisture or other substances from directly entering the heat dissipation duct 30. This avoids external substances entering the drive motor 33 through the heat dissipation duct 30 and causing malfunctions, thereby extending the service life of the drive motor 33.

[0076] In one embodiment of this disclosure, such as Figure 3 and Figure 4 The cleaning equipment also includes a motor mounting base 11 fixedly connected to the body 1. The motor mounting base 11 is located at the end of the drive motor 33 away from the gearbox 31. The outer casing 34 is fixedly connected to the motor mounting base 11. The end of the drive motor 33 is a certain distance from the motor mounting base 11. The outer casing 34 protrudes from the end of the drive motor 33, forming a cavity between the motor mounting base 11 and the outer casing 34. The second fan 7 is located in this cavity. The airflow from the motor outlet 332 passes through the second fan 7 and flows out from the motor mounting base 11.

[0077] When the cleaning equipment of this disclosure starts working, the drive motor 33 drives the transmission seat 21 to rotate through the reduction gearbox 31 and coupling 32, thereby driving the cleaning roller 2 to rotate and clean the surface to be cleaned. Driven by the cleaning roller 2, the first fan 6 located at the second end of the cleaning roller 2 starts to rotate, generating negative pressure. Under the action of negative pressure, the external airflow enters the airflow duct 8 from the second end of the cleaning roller 2, that is, the inner cavity 20 of the cleaning roller 2. The airflow continues to flow to the middle of the cleaning roller 2, passing through the blades in the transmission seat 21, where the airflow is accelerated a second time and continues to flow towards the heat dissipation duct 30. After passing through the transmission seat 21, the airflow enters the heat dissipation duct 30 between the reduction gearbox 31 and the outer casing 34 through the air inlet 301 on the reduction gearbox 31, and then enters the interior of the drive motor 33 through the motor air inlet 331 to dissipate heat from the drive motor 33. The airflow inside the drive motor 33 flows out through the motor outlet 332 and enters the gap between the housing 34 and the drive motor 33, continuing to flow towards the second fan 7. After passing the second fan 7, it is accelerated again and finally flows out through the motor mounting base 11, completing the heat dissipation process. The airflow undergoes three accelerations during the heat dissipation process, which can complete the entire heat dissipation process more quickly and greatly improve the heat dissipation efficiency.

[0078] Application Scenario 1

[0079] The cleaning equipment disclosed herein can be a floor scrubber. When a user starts the cleaning equipment to clean the floor, the user will select different cleaning modes according to different floor conditions. When the user selects a powerful cleaning mode, the drive motor 33 in the cleaning equipment will work at a higher power and generate more heat.

[0080] During the rotation of the cleaning roller 2, the drive motor 33 drives the first fan 6, the second fan 7, and the blades on the transmission seat 21 to rotate synchronously. The negative pressure generated by the first fan 6 causes external airflow to enter the airflow duct 8. The external airflow first enters the inner cavity 20 through the second end of the cleaning roller 2, flows to the transmission seat 21 in the inner cavity 20, and is accelerated by the blades of the transmission seat 21. The seal 4 is in an open state under the pressure of the transmission seat 21, and the airflow can enter the heat dissipation duct 30 through the air inlet 301. In the heat dissipation duct 30, it continues to flow to the motor air inlet 331 and enters the drive motor 33 to dissipate heat from the drive motor 33. Then it flows out through the motor air outlet 332 and flows to the second fan 7. After being accelerated by the second fan 7, it flows out through the motor mounting seat 11, completing the entire heat dissipation process.

[0081] Application Scenario 2

[0082] After the cleaning equipment has been used for a period of time, the cleaning roller 2 needs to be removed from the cleaning equipment for cleaning. When the cleaning roller 2 is removed from the drive unit, the coupling 32 disengages from the transmission seat 21. At this time, under the elastic restoring force of the elastic device 5, the coupling 32 moves from the second position to the first position, thereby blocking the air inlet 301 of the heat dissipation duct 30 with the seal 4 on the coupling 32. This prevents external water from entering the interior of the drive unit through the air inlet 302 and causing damage to the internal components of the drive unit.

[0083] During installation, the first end of the cleaning roller 2 is fitted onto the drive unit, and the coupling 32 of the drive unit is inserted into the transmission seat 21. Under the pressure of the transmission seat 21, the coupling 32 moves from the first position to the second position. At this time, the seal 4 opens the air inlet 301 of the heat dissipation duct 30, thus connecting the heat dissipation duct 30 to the inner cavity 20 of the cleaning roller 2. When the cleaning roller 2 rotates, the external airflow flows through the inner cavity 20 and the heat dissipation duct 30, thereby cooling the drive unit.

[0084] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A cleaning device, characterized in that, include: Body (1); A roller brush that rotates about its axis to clean a surface, the roller brush having an inner cavity (20). A drive unit is connected to the body (1) and has a heat dissipation duct (30); the drive unit is configured to extend into the inner cavity (20) of the roller brush and drively engage with the roller brush; the heat dissipation duct (30) of the drive unit communicates with the inner cavity (20) of the roller brush and forms a flow channel (8). A fan assembly disposed in the airflow duct (8) and configured to rotate synchronously with the roller brush to create a negative pressure in the airflow duct (8); The output end of the drive device is provided with a coupling (32), and a transmission seat (21) is provided in the inner cavity (20) of the roller brush; the drive device is provided with an air inlet (301) and a seal (4) for sealing the air inlet (301); the seal (4) is configured such that when the drive device is assembled with the roller brush, the air inlet (301) is opened under the pressure of the transmission seat (21) to connect the heat dissipation duct (30) with the inner cavity (20); and when the drive device is disengaged from the roller brush, the air inlet (301) is sealed under the elastic restoring force.

2. The cleaning equipment according to claim 1, characterized in that, The roller brush is a cleaning roller (2) with its rotation axis parallel to the working surface. The inner cavity (20) passes through the first and second ends of the cleaning roller (2). The driving device extends from the first end of the cleaning roller (2) into the inner cavity (20) of the cleaning roller (2) and is connected to the cleaning roller (2) in a transmission manner. The second end of the cleaning roller (2) is rotatably connected to the machine body (1).

3. The cleaning equipment according to claim 2, characterized in that, External airflow is configured to enter the inner cavity (20) from the second end of the cleaning roller (2), flow through the heat dissipation duct (30) and then flow out.

4. The cleaning equipment according to claim 2, characterized in that, The fan assembly includes a first fan (6) disposed at the second end of the cleaning roller (2), the first fan (6) being configured to rotate synchronously with the cleaning roller (2) to create a negative pressure in the airflow duct (8).

5. The cleaning equipment according to claim 4, characterized in that, The first fan (6) includes a cylindrical base (61) configured to be fixed to the second end of the cleaning roller (2); a mounting seat (62) is provided in the hollow cavity of the base (61) and the mounting seat (62) is configured to be rotatably connected to the body (1); blades are provided between the mounting seat (62) and the base (61).

6. The cleaning equipment according to claim 1, characterized in that, The coupling (32) is configured to be connected to the drive seat (21) in a pluggable manner.

7. The cleaning equipment according to claim 6, characterized in that, The fan assembly includes blades disposed on the drive seat (21); the blades are configured to create a negative pressure in the inner cavity (20) as the cleaning roller (2) rotates.

8. The cleaning equipment according to claim 6, characterized in that, The transmission seat (21) has a transmission cavity (22) facing the coupling (32), the coupling (32) being configured to have a shape adapted to the transmission cavity (22); a channel for airflow is provided on the transmission seat (21).

9. The cleaning equipment according to claim 1, characterized in that, The drive unit includes a gearbox (31), and a coupling (32) is disposed at the output end of the gearbox (31). The coupling (32) is configured to move along the axial direction of the gearbox (31) between a first position and a second position. A seal (4) is fixed to the coupling (32), and the coupling (32) is configured to move from the first position to the second position under the pressure of a transmission seat (21), so that the seal (4) opens the air inlet (301), connecting the heat dissipation duct (30) to the inner cavity (20); or, The drive unit includes a gearbox (31), the coupling (32) is disposed at the output end of the gearbox (31), and the seal (4) is fixed to the coupling (32); the seal (4) is configured to deform under the pressure of the transmission seat (21) to open the air inlet (301) and connect the heat dissipation duct (30) with the inner cavity (20).

10. The cleaning equipment according to claim 9, characterized in that, The drive device includes a drive motor (33), and the gearbox (31) is fixed to one end of the drive motor (33). The drive device also includes a housing (34), which is fitted on the outside of the drive motor (33) and the gearbox (31). The airflow in the inner cavity (20) is configured to enter the gap between the housing (34) and the gearbox (31) through the air inlet (301) and then enter the heat dissipation duct (30) of the drive motor (33).

11. The cleaning equipment according to claim 10, characterized in that, The gearbox (31) includes a housing (310) and a mounting cavity (312) located at the open end of the housing (310); the air inlet (301) passes through the inner wall of the mounting cavity (312); an axially extending guide cavity (302) is also provided on the outer wall of the housing (310); the airflow from the air inlet (301) is configured to flow into the heat dissipation duct (30) of the drive motor (33) through the guide cavity (302).

12. The cleaning equipment according to claim 10, characterized in that, A sealing ring (35) is provided between the housing (34) and the drive motor (33), and the airflow flowing through the gap between the housing (34) and the gearbox (31) is configured to enter the heat dissipation duct (30) of the drive motor (33) from the inlet provided on the drive motor (33).

13. The cleaning equipment according to claim 10, characterized in that, The fan assembly includes a second fan (7) fixed to one end of the drive motor (33) away from the gearbox (31).

14. The cleaning equipment according to claim 13, characterized in that, It also includes a motor mounting base (11) fixed on the body (1), the outer shell (34) is mounted on the motor mounting base (11), and the second fan (7) is located in the cavity between the outer shell (34) and the motor mounting base (11); the drive motor (33) is provided with a motor air outlet (332) communicating with the heat dissipation duct (30), and the airflow flowing out from the motor air outlet (332) is configured to flow out through the motor mounting base (11).

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