Floor brush assembly for cleaning device and cleaning device

Abstract

The utility model relates to the field of electric appliances, in particular to a floor brush assembly for a cleaning device and the cleaning device. The floor brush assembly comprises a shell and a transmission support arranged in the shell, a motor containing space, a rolling brush containing space and a transmission belt containing space are formed in the shell, a motor is arranged in the motor containing space, a rolling brush is arranged in the rolling brush containing space, and a transmission belt is arranged in the transmission belt containing space. The transmission belt containing space is communicated with the motor containing space through a first channel and communicated with the rolling brush containing space through a second channel, and the motor containing space is communicated with the air inlet. When the cleaning device works, negative pressure is generated in the rolling brush containing space, and under the action of the negative pressure, external airflow can continuously and sequentially pass through the air inlet, the motor containing space and the first channel to flow into the transmission belt containing space and flow out of the transmission belt containing space through the second channel, so that the heat dissipation effect on the transmission belt is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of electrical appliances, in particular to a floor brush assembly for a cleaning device and a cleaning device. Background Art

[0002] In the existing floor brush assembly and the cleaning device including the floor brush assembly, the motor drives the roller brush to rotate through the transmission structure composed of the pulley and the transmission belt. The pulley and the transmission belt are arranged in the transmission belt accommodating space. In order to dissipate the heat of the transmission belt to increase its service life, there are currently two solutions. One is to dissipate the heat of the transmission belt near the motor through self-heating motor suction, but this solution cannot effectively dissipate the heat of the transmission belt near the roller brush, and the heat dissipation effect of the transmission belt is not good; the other is to open an opening on the housing of the floor brush assembly to connect the transmission belt accommodating space and the outside of the housing, so that the heat on the transmission belt can escape to the outside of the housing through the opening on the housing, but this solution belongs to passive heat dissipation and the heat dissipation effect is not good. Utility Model Content

[0003] The utility model aims to provide a floor brush assembly for a cleaning device and a cleaning device which can improve the heat dissipation effect of a transmission belt.

[0004] To achieve the above object, the utility model provides a floor brush assembly for a cleaning device, comprising:

[0005] case;

[0006] A transmission bracket, wherein the transmission bracket is arranged in the housing;

[0007] A motor, the motor is arranged in the motor accommodating space in the housing and close to the proximal end of the transmission bracket, the motor has a motor heat dissipation channel, and the motor heat dissipation channel has an air inlet and an air outlet communicated with the outside of the housing;

[0008] A roller brush, the roller brush is arranged in a roller brush accommodating space in the housing and close to the distal end of the transmission bracket, and when the cleaning device is working, a negative pressure is generated in the roller brush accommodating space;

[0009] A transmission belt, the transmission belt is installed in the transmission belt accommodating space in the housing, and the transmission belt is connected to the output shaft of the motor at the proximal end of the transmission bracket and is connected to the rotating shaft of the roller brush at the distal end of the transmission bracket;

[0010] The transmission belt accommodating space is connected to the motor accommodating space through a first channel, and is connected to the roller brush accommodating space through a second channel. The motor accommodating space is connected to the air inlet. Under the action of negative pressure, the external airflow passes through the air inlet, the motor accommodating space, and the first channel in sequence to flow into the transmission belt accommodating space, and flows out of the transmission belt accommodating space through the second channel to at least partially take away the heat of the transmission belt.

[0011] As a further improvement of the present invention, the transmission belt accommodating space is connected to the motor heat dissipation channel through a third channel, and the airflow that flows into the transmission belt accommodating space through the air inlet, the motor accommodating space, and the first channel in sequence also at least partially flows out of the transmission belt accommodating space through the third channel.

[0012] As a further improvement of the present invention, the transmission belt accommodating space and the roller brush accommodating space are separated by the transmission bracket, and the transmission belt accommodating space and the motor accommodating space are separated by the transmission bracket, the second channel is located at the distal end of the transmission bracket, the third channel is located at the proximal end of the transmission bracket, and the first channel is located between the distal end and the proximal end of the transmission bracket.

[0013] As a further improvement of the present invention, the floor brush assembly also includes a wind hood arranged in the shell, the wind hood and the shell define the roller brush accommodating space, the second channel includes a distal through hole formed at the distal end of the transmission bracket, and a wind hood through hole formed on the wind hood and corresponding to the distal through hole; the third channel is a proximal through hole formed at the proximal end of the transmission bracket; and the first channel is a middle through hole formed in the middle of the transmission bracket.

[0014] As a further improvement of the present invention, the air inlet and the air outlet are both formed on the shell and connected to the motor accommodating space, the motor includes a motor housing, a heat dissipation cavity is formed in the motor housing, the motor accommodating space is connected to the heat dissipation cavity through a heat dissipation inlet and a heat dissipation outlet opened on the motor housing, the motor heat dissipation channel starts from the air inlet and passes through the motor accommodating space, the heat dissipation inlet, the heat dissipation cavity, the heat dissipation outlet, the motor accommodating space to the air outlet in sequence, and the third channel is connected to the motor heat dissipation channel through the heat dissipation inlet.

[0015] As a further improvement of the utility model, the heat dissipation outlet is connected to the air outlet through a first guide channel, the air inlet and the first channel are connected through a second guide channel, and the floor brush assembly also includes a partition, and the first guide channel and the second guide channel are separated by the partition, and the partition includes a partition part formed on the shell and a matching part arranged on the motor housing.

[0016] As a further improvement of the utility model, the floor brush assembly further includes a scraper bar, one end of which is fixed to the transmission bracket, and the other end of which contacts the inner surface of the transmission belt.

[0017] As a further improvement of the present invention, the transmission bracket includes a base plate, a reinforcing rib connected to the base plate and located in the area formed by the transmission belt, the middle through hole is opened on the base plate and located on the upper and lower sides of the reinforcing rib, and the scraper strip is fixed on the reinforcing rib.

[0018] As a further improvement of the present invention, the floor brush assembly also includes a first pulley and a second pulley, the rotating shaft of the roller brush is connected to the transmission belt through the first pulley, the output shaft of the motor is connected to the transmission belt through the second pulley, and the transmission bracket also includes a side wall connected to the base plate and surrounding the first pulley, the second pulley and the transmission belt, and a notch surrounding the first pulley is opened on the side wall.

[0019] The utility model also provides a cleaning device, which comprises the above-mentioned floor brush assembly.

[0020] Beneficial effects:

[0021] The floor brush assembly for a cleaning device provided by the utility model connects the transmission belt accommodating space and the motor accommodating space through a first channel, and connects the transmission belt accommodating space and the roller brush accommodating space through a second channel, so that under the action of the negative pressure generated in the roller brush accommodating space, the external airflow can continuously flow into the transmission belt accommodating space through the air inlet, the motor accommodating space, and the first channel in sequence, and flow out of the transmission belt accommodating space through the second channel, so as to at least partially take away the heat of the transmission belt, thereby improving the heat dissipation effect of the transmission belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a floor brush assembly provided in one embodiment of the utility model;

[0023] Figure 2 for Figure 1 A three-dimensional exploded schematic diagram of the middle floor brush assembly;

[0024] Figure 3 for Figure 1Another exploded perspective view of the middle floor brush assembly;

[0025] Figure 4 for Figure 3 A front view of the middle transmission bracket;

[0026] Figure 5 for Figure 3 Schematic diagram of the structure of the stroke mask;

[0027] Figure 6 for Figure 3 Schematic diagram of some structures in;

[0028] Figure 7 for Figure 6 A three-dimensional exploded schematic diagram of the middle motor, the second pulley and the matching part;

[0029] Figure 8 for Figure 1 A schematic diagram of a three-dimensional cross-sectional structure of a middle floor brush assembly;

[0030] Fig. 9 for Figure 3 A schematic diagram of the structure of the middle and upper shell;

[0031] Fig.10 A partial schematic diagram of a floor brush assembly provided in one embodiment of the utility model shows the airflow path of external airflow in the floor brush assembly.

[0032] In the figure:

[0033] 100. Floor brush assembly;

[0034] 10. Shell; 11. Air inlet; 12. Air outlet; 13. Dust suction port; 14. First guide channel; 15. Second guide channel; 16. Partitioning member; 161. Partitioning portion; 1611. First partitioning portion; 1612. First notch; 1613. Second partitioning portion; 1614. Second notch; 162. Matching portion; 17. Upper shell; 18. Lower shell;

[0035] 20. Transmission bracket; 21. First channel; 211. Middle through hole; 22. Second channel; 221. Far through hole; 23. Third channel; 231. Near through hole; 24. Base plate; 25. Reinforcement rib; 26. First pulley; 27. Second pulley; 28. Side wall; 281. Notch;

[0036] 30. Motor; 31. Motor accommodation space; 32. Output shaft; 33. Motor housing; 331. Heat dissipation cavity; 332. Heat dissipation inlet; 333. Heat dissipation outlet;

[0037] 40. roller brush; 41. roller brush accommodating space; 42. rotating shaft;

[0038] 50. transmission belt; 51. transmission belt accommodation space;

[0039] 60. wind shield; 61. wind shield through hole;

[0040] 70. Scrape strips. DETAILED DESCRIPTION

[0041] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, the embodiments do not limit the present invention, and any changes in mechanism, method, or function made by a person skilled in the art based on the embodiments are all within the protection scope of the present invention.

[0042] The terms used herein, such as "upper", "lower", "left", "right", "front", "back", etc., which indicate relative spatial positions, are used for the purpose of convenience to describe the relationship between one feature and another feature as shown in the accompanying drawings. It is understood that, depending on the placement of the product, the terms of relative spatial positions may be intended to include different orientations other than those shown in the drawings, and should not be construed as limitations on the claims. In addition, the descriptor "horizontal" used herein is not completely equivalent to being perpendicular to the direction of gravity, and a certain angle of inclination is allowed.

[0043] An embodiment of the present invention provides a cleaning device, which includes a floor brush assembly 100 .

[0044] like Figure 1-9 As shown, the floor brush assembly 100 includes a housing 10, a transmission bracket 20, a motor 30, a roller brush 40, a transmission belt 50 and other components. The transmission bracket 20 is disposed in the housing 10, and a motor accommodating space 31, a roller brush accommodating space 41 and a transmission belt accommodating space 51 are formed in the housing 10. In this embodiment, the housing 10 is a combined structure, that is, the housing 10 includes an upper housing 17 and a lower housing 18 combined together. Alternatively, the housing 10 includes a left housing or a right housing combined together.

[0045] The motor 30 is disposed in the motor accommodating space 31 and is close to the proximal end of the transmission bracket 20. The motor 30 has a motor heat dissipation channel, and the motor heat dissipation channel has an air inlet 11 and an air outlet 12 that are connected to the outside of the housing 10. External airflow can enter the motor heat dissipation channel through the air inlet 11, and after flowing through the motor heat dissipation channel, it flows out to the outside of the housing 10 through the air outlet 12. In this process, the external airflow can at least partially take away the heat on the motor 30.

[0046] The roller brush 40 is arranged in the roller brush accommodating space 41 and is close to the distal end of the transmission bracket 20. When the cleaning device is working, negative pressure is generated in the roller brush accommodating space 41, and external dirt can be sucked into the roller brush accommodating space 41 under the action of the negative pressure. It can be imagined that the housing 10 is provided with a dust suction port 13 connecting the roller brush accommodating space 41 and the outside of the housing 10 near the roller brush 40. Under the action of negative pressure, external dirt is sucked into the dust cup of the cleaning device through the dust suction port 13 and the roller brush accommodating space 41. The cleaning device includes a suction motor (not shown in the figure). When the suction motor is working, it continuously draws out the airflow in the roller brush accommodating space 41 to generate negative pressure in the roller brush accommodating space 41.

[0047] The transmission belt 50 is installed in the transmission belt accommodating space 51, and the transmission belt 50 is connected to the output shaft 32 of the motor 30 at the proximal end of the transmission bracket 20, and is connected to the rotating shaft 42 of the roller brush 40 at the distal end of the transmission bracket 20. The motor 30 can drive the roller brush 40 to rotate through the transmission of the transmission belt 50, and the roller brush 40 can clean the floor when rotating.

[0048] It should be noted that when the user uses the floor brush assembly 100, the floor brush assembly 100 is located in front of the user, the proximal end of the transmission bracket 20 should be understood as the end close to the user, and the distal end of the transmission bracket 20 should be understood as the end away from the user.

[0049] The transmission belt accommodating space 51 is communicated with the motor accommodating space 31 through the first channel 21, and is communicated with the roller brush accommodating space 41 through the second channel 22. The motor accommodating space 31 is communicated with the air inlet 11. Under the action of the negative pressure generated in the roller brush accommodating space 41, the external airflow can flow into the transmission belt accommodating space 51 through the air inlet 11, the motor accommodating space 31, and the first channel 21 in sequence, and flow out of the transmission belt accommodating space 51 through the second channel 22, so as to at least partially remove the heat on the transmission belt 50.

[0050] Furthermore, the transmission belt accommodating space 51 is connected to the motor heat dissipation channel through the third channel 23. The airflow that flows into the transmission belt accommodating space 51 passes through the air inlet 11, the motor accommodating space 31, and the first channel 21 in sequence also at least partially flows out of the transmission belt accommodating space 51 through the third channel 23 and enters the motor heat dissipation channel to further take away the heat on the transmission belt 50.

[0051] In this embodiment, the transmission belt accommodating space 51 and the roller brush accommodating space 41 are separated by the transmission bracket 20, and the transmission belt accommodating space 51 and the motor accommodating space 31 are also separated by the transmission bracket 20, the second channel 22 is located at the far end of the transmission bracket 20, the third channel 23 is located at the near end of the transmission bracket 20, and the first channel 21 is located between the far end and the near end of the transmission bracket 20. As described above, under the action of negative pressure, the external airflow flows into the transmission belt accommodating space 51 through the air inlet 11, the motor accommodating space 31, and the first channel 21, as shown in FIG. Fig.10 As shown, the airflow flowing into the transmission belt accommodating space 51 is then divided into two paths, one path flows toward the far end of the transmission bracket 20, and flows out of the transmission belt accommodating space 51 through the second channel 22 at the far end of the transmission bracket 20, and enters the roller brush accommodating space 41; the other path flows toward the proximal end of the transmission bracket 20, and flows out of the transmission belt accommodating space 51 through the third channel 23 at the proximal end of the transmission bracket 20, and enters the motor heat dissipation channel. In this way, the airflow fully flows through the transmission belt 50 in the transmission belt accommodating space 51, and can effectively take away the heat on the transmission belt 50.

[0052] The floor brush assembly 100 further includes a first pulley 26 and a second pulley 27. The rotating shaft 42 of the roller brush 40 is connected to the transmission belt 50 through the first pulley 26. The output shaft 32 of the motor 30 is connected to the transmission belt 50 through the second pulley 27. The first pulley 26 is located at the distal end of the transmission bracket 20, and the second pulley 27 is located at the proximal end of the transmission bracket 20. The airflow entering the transmission belt accommodating space 51 through the first channel 21 flows through the portion of the transmission belt 50 at the first pulley 26 when it flows out of the transmission belt accommodating space 51 through the second channel 22 at the distal end of the transmission bracket 20, and flows through the portion of the transmission belt 50 at the second pulley 27 when it flows out of the transmission belt accommodating space 51 through the third channel 23 at the proximal end of the transmission bracket 20, thereby taking away the heat on the portion of the transmission belt 50 at the first pulley 26 and the portion of the transmission belt 50 at the second pulley 27.

[0053] Specifically, the floor brush assembly 100 further includes a wind shield 60 disposed in the housing 10, the wind shield 60 and the housing 10 define a roller brush accommodating space 41, the second channel 22 includes a distal through hole 221 formed at the distal end of the transmission bracket 20, and a wind shield through hole 61 formed on the wind shield 60 and corresponding to the distal through hole 221, and the wind shield 60 isolates the roller brush accommodating space 41 from other spaces in the housing 10 to prevent dirt in the roller brush accommodating space 41 from leaking out of the roller brush accommodating space 41. The airflow in the transmission belt accommodating space 51 can flow into the roller brush accommodating space 41 through the distal through hole 221 and the wind shield through hole 61 in sequence.

[0054] The third channel 23 is a proximal through hole 231 formed at the proximal end of the transmission bracket 20, and the airflow in the transmission belt accommodating space 51 can flow into the motor heat dissipation channel through the proximal through hole 231; the first channel 21 is a middle through hole 211 formed in the middle part of the transmission bracket 20, and the external airflow can enter the transmission belt accommodating space 51 through the middle through hole 211.

[0055] In this embodiment, the air inlet 11 and the air outlet 12 are both formed in the housing 10 and communicate with the motor accommodating space 31. The motor 30 includes a motor housing 33, a heat dissipation cavity 331 is formed in the motor housing 33, the motor accommodating space 31 is communicated with the heat dissipation cavity 331 through a heat dissipation inlet 332 and a heat dissipation outlet 333 provided on the motor housing 33, and the motor heat dissipation channel passes through the motor accommodating space 31, the heat dissipation inlet 332, the heat dissipation cavity 331, the heat dissipation outlet 333, the motor accommodating space 31 to the air outlet 12 in sequence from the air inlet 11, that is, the external airflow can pass through the motor accommodating space 31, the heat dissipation inlet 332, the heat dissipation cavity 331, the heat dissipation outlet 333, the motor accommodating space 31 to the air outlet 12 in sequence from the air inlet 11, and finally flows out of the motor accommodating space 31, and in this process at least partially takes away the heat on the motor 30. The heat dissipation inlet 332 is arranged near the transmission bracket 20, and the heat dissipation outlet 333 is arranged far away from the transmission bracket 20. The third channel 23 is connected to the motor heat dissipation channel through the heat dissipation inlet 332. The airflow in the transmission belt accommodating space 51 can enter the heat dissipation cavity 331 through the third channel 23 and the heat dissipation inlet 332 in sequence. It can be imagined that the heat dissipation cavity 331 is a part of the motor heat dissipation channel.

[0056] The motor 30 may further include a fan blade located in the heat dissipation cavity 331 and connected to the output shaft 32 of the motor 30. When the output shaft 32 rotates, the fan blade rotates with the output shaft 32. When the fan blade rotates, it can promote the airflow outside the heat dissipation cavity 331 to enter the heat dissipation cavity 331 from the heat dissipation inlet 332, and promote the airflow inside the heat dissipation cavity 331 to flow out of the heat dissipation cavity 331 from the heat dissipation outlet 333. In this way, the fan blade can actively draw the external airflow from the air inlet 11 into the motor accommodating space 31, and then draw it into the heat dissipation cavity 331 through the heat dissipation inlet 332, and draw the airflow in the transmission belt accommodating space 51 into the heat dissipation cavity 331 through the third channel 23 and the heat dissipation inlet 332. The airflow drawn into the heat dissipation cavity 331 is discharged to the motor accommodating space 31 through the heat dissipation outlet 333 under the action of the fan blade, and finally flows out to the outside of the housing 10 through the air outlet 12.

[0057] The heat dissipation outlet 333 is connected to the air outlet 12 through the first guide channel 14, and the air inlet 11 is connected to the first channel 21 through the second guide channel 15. The floor brush assembly 100 also includes a partition 16, and the first guide channel 14 and the second guide channel 15 are separated by the partition 16. The first guide channel 14 and the second guide channel 15 are both located in the motor accommodating space 31. The airflow flowing out of the heat dissipation cavity 331 from the heat dissipation outlet 333 flows to the air outlet 12 through the first guide channel 14, and then flows out of the air outlet 12 to the outside of the housing 10; the external airflow flows into the second guide channel 15 from the air inlet 11, and flows to the first channel 21 through the second guide channel 15, and then flows into the transmission belt accommodating space 51 through the first channel 21. The airflow flowing out of the heat dissipation cavity 331 from the heat dissipation outlet 333 is a hot airflow that absorbs heat from the motor 30 and the transmission belt 50, and the external airflow flowing into the second guide channel 15 from the air inlet 11 is a cold airflow. The first guide channel 14 and the second guide channel 15 are separated by the partition 16 to avoid mutual influence between the hot and cold airflows.

[0058] The partition 16 includes a partition 161 formed on the housing 10 and a matching portion 162 disposed on the motor housing 33. The partition 161 and the matching portion 162 cooperate to separate the first guide channel 14 and the second guide channel 15, and effectively prevent the airflow in the first guide channel 14 and the second guide channel 15 from performing heat exchange. Specifically, the matching portion 162 is annular and sleeved on the periphery of the motor housing 33. A circular through hole matching the matching portion 162 is formed on the partition 161. The motor housing 33 is disposed through the circular through hole. The outer periphery of the matching portion 162 is attached to the partition 161. In this way, the partition 161 and the matching portion 162 can separate the first guide channel 14 and the second guide channel 15.

[0059] More specifically, the partition 161 includes a first partition 1611 formed on the upper shell 17 and a second partition 1613 formed on the lower shell 18. The first partition 1611 is provided with a first semicircular notch 1612, and the second partition 1613 is provided with a second semicircular notch 1614. When the upper shell 17 and the lower shell 18 are combined together, the first notch 1612 and the second notch 1614 are combined to form the above-mentioned circular through hole.

[0060] In this embodiment, the floor brush assembly 100 further includes a scraper bar 70 , one end of which is fixed to the transmission bracket 20 , and the other end of which contacts the inner surface of the transmission belt 50 . The scraper bar 70 can scrape away dust and particles on the transmission belt 50 .

[0061] Further, the transmission bracket 20 includes a base plate 24, a reinforcing rib 25 connected to the base plate 24 and located in the area surrounded by the transmission belt 50, and the middle through hole 211 is opened on the base plate 24 and located on the upper and lower sides of the reinforcing rib 25. When the external airflow enters the transmission belt accommodating space 51 through the middle through hole 211, it can directly blow the transmission belt 50 to effectively take away the heat on the transmission belt 50. The middle through hole 211 is formed by removing part of the material on the base plate 24. Therefore, the existence of the middle through hole 211 affects the strength of the base plate 24. The provision of the reinforcing rib 25 can ensure that the base plate 24 has sufficient strength, and the reinforcing rib 25 can also be used to fix the scraper 70. In other embodiments, the reinforcing rib 25 is annular and is arranged around the middle through hole 211.

[0062] In other embodiments, one end of the scraper strip 70 may be fixed to the housing 10 , and the other end may contact the inner surface of the transmission belt 50 .

[0063] In this embodiment, the transmission bracket 20 also includes a side wall 28 connected to the base plate 24 and surrounding the first pulley 26, the second pulley 27 and the transmission belt 50. The side wall 28 is provided with a notch 281 surrounding the first pulley 26. The side wall 28 is used to at least partially confine the airflow flowing from the first channel 21 into the transmission belt accommodating space 51 within the transmission belt accommodating space 51. The notch 281 provided on the side wall 28 can facilitate the installation of the transmission belt 50 on the first pulley 26.

[0064] refer to Fig.10 As shown, when the floor brush assembly 100 is working, the heat dissipation principle of the transmission belt 50 is as follows:

[0065] Under the negative pressure generated in the roller brush accommodating space 41 and the action of the fan blades, the external airflow first enters the motor accommodating space 31 (such as Fig.10 Then, the first channel 21 enters the transmission belt accommodating space 51 (as shown by the arrow S1 in FIG. Fig.10 After entering the transmission belt accommodating space 51, the airflow is divided into two parts, one part flows toward the far end of the transmission bracket 20, and the other part flows toward the near end of the transmission bracket 20. The part of the airflow flowing toward the far end of the transmission bracket 20 flows into the roller brush accommodating space 41 through the second channel 22 at the far end of the transmission bracket 20 (as shown in FIG. Fig.10 As shown by the arrow S3 in the figure, the heat on the transmission belt 50 is at least partially removed, and the airflow entering the roller brush accommodating space 41 is finally drawn out of the roller brush accommodating space 41 by the suction motor (as shown in the figure). Fig.10 The portion of the airflow flowing toward the proximal end of the transmission bracket 20 first flows into the motor heat dissipation channel through the third channel 23 at the proximal end of the transmission bracket 20 (as shown in the arrow S4); Fig.10 ), and then flows out through the air outlet 12 to the outside of the housing 10 (as shown by the arrow S5 in FIG. Fig.10 As shown by arrow S6 in the figure), the heat on the transmission belt 50 can be further removed.

[0066] To sum up, when the floor brush assembly 100 for a cleaning device and the cleaning device provided by the utility model are in use, under the action of the negative pressure generated in the roller brush accommodating space 41, the external airflow can continuously flow into the transmission belt accommodating space 51 through the air inlet 11, the motor accommodating space 31, and the first channel 21 in sequence, and flow out of the transmission belt accommodating space 51 through the second channel 22, thereby enhancing the heat dissipation effect on the transmission belt 50.

[0067] It should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0068] The above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A floor brush assembly for a cleaning device, comprising: case; A transmission bracket, wherein the transmission bracket is arranged in the housing; A motor, the motor is arranged in the motor accommodating space in the housing and close to the proximal end of the transmission bracket, the motor has a motor heat dissipation channel, and the motor heat dissipation channel has an air inlet and an air outlet communicated with the outside of the housing; A roller brush, the roller brush is arranged in a roller brush accommodating space in the housing and close to the distal end of the transmission bracket, and when the cleaning device is working, a negative pressure is generated in the roller brush accommodating space; A transmission belt, the transmission belt is installed in the transmission belt accommodating space in the housing, and the transmission belt is connected to the output shaft of the motor at the proximal end of the transmission bracket and is connected to the rotating shaft of the roller brush at the distal end of the transmission bracket; Features: The transmission belt accommodating space is connected to the motor accommodating space through a first channel, and is connected to the roller brush accommodating space through a second channel. The motor accommodating space is connected to the air inlet. Under the action of negative pressure, the external airflow passes through the air inlet, the motor accommodating space, and the first channel in sequence to flow into the transmission belt accommodating space, and flows out of the transmission belt accommodating space through the second channel to at least partially take away the heat of the transmission belt.

2. The floor brush assembly according to claim 1, characterized in that: The transmission belt accommodating space is connected to the motor heat dissipation channel through the third channel. The airflow that flows into the transmission belt accommodating space through the air inlet, the motor accommodating space, and the first channel in sequence also at least partially flows out of the transmission belt accommodating space through the third channel.

3. The floor brush assembly according to claim 2, characterized in that: The transmission belt accommodating space and the roller brush accommodating space are separated by the transmission bracket, and the transmission belt accommodating space and the motor accommodating space are separated by the transmission bracket, the second channel is located at the distal end of the transmission bracket, the third channel is located at the proximal end of the transmission bracket, and the first channel is located between the distal end and the proximal end of the transmission bracket.

4. The floor brush assembly according to claim 3, characterized in that: The floor brush assembly also includes a wind hood arranged in the shell, the wind hood and the shell define the roller brush accommodating space, the second channel includes a distal through hole formed at the distal end of the transmission bracket, and a wind hood through hole formed on the wind hood and corresponding to the distal through hole; the third channel is a proximal through hole formed at the proximal end of the transmission bracket; the first channel is a middle through hole formed in the middle of the transmission bracket.

5. The floor brush assembly according to claim 2, characterized in that: The air inlet and the air outlet are both formed on the shell and communicated with the motor accommodating space. The motor includes a motor housing, a heat dissipation cavity is formed in the motor housing, the motor accommodating space is communicated with the heat dissipation cavity via a heat dissipation inlet and a heat dissipation outlet opened on the motor housing, the motor heat dissipation channel passes through the motor accommodating space, the heat dissipation inlet, the heat dissipation cavity, the heat dissipation outlet, the motor accommodating space to the air outlet in sequence from the air inlet, and the third channel is communicated with the motor heat dissipation channel via the heat dissipation inlet.

6. The floor brush assembly according to claim 5, characterized in that: The heat dissipation outlet is connected to the air outlet through a first guide channel, and the air inlet and the first channel are connected through a second guide channel. The floor brush assembly also includes a partition, and the first guide channel and the second guide channel are separated by the partition. The partition includes a partition part formed on the shell and a matching part arranged on the motor housing.

7. The floor brush assembly according to claim 4, characterized in that: The floor brush assembly also includes a scraper bar, one end of which is fixed to the transmission bracket, and the other end of which contacts the inner surface of the transmission belt.

8. The floor brush assembly according to claim 7, characterized in that: The transmission bracket includes a base plate, a reinforcing rib connected to the base plate and located in the area surrounded by the transmission belt, the middle through hole is opened on the base plate and located on the upper and lower sides of the reinforcing rib, and the scraper strip is fixed on the reinforcing rib.

9. The floor brush assembly according to claim 8, characterized in that: The floor brush assembly also includes a first pulley and a second pulley, the rotating shaft of the roller brush is connected to the transmission belt via the first pulley, the output shaft of the motor is connected to the transmission belt via the second pulley, and the transmission bracket also includes a side wall connected to the base plate and surrounding the first pulley, the second pulley and the transmission belt, the side wall is provided with a notch surrounding the first pulley.

10. A cleaning device, characterized in that: The invention comprises a floor brush assembly as described in any one of claims 1 to 9.

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