Disc brush assembly and scrubber

Abstract

The disc brush assembly comprises a shell and a connecting rod with one end extending into the shell, a transmission rod driven by a power element to rotate is arranged in the connecting rod, a transmission assembly is arranged in the shell, a disc brush is arranged on the shell, the transmission rod drives the disc brush to rotate through the transmission assembly, and a first water pipe is integrated in the connecting rod. A nozzle for spraying water to the disc brush is arranged in the shell and communicates with the first water pipe through a water path assembly. The utility model has the advantages that the integration of a waterway system and a power system in the scrubber can be improved, the synchronism of water spraying and floor brushing of the scrubber is high, and the floor washing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of floor scrubbers, in particular to a disc brush assembly and a floor scrubber. Background Art

[0002] The floor scrubbers in the prior art generally include a floor brushing assembly, a clean water spraying assembly and a sewage suction assembly. The floor brushing assembly includes a disc brush and a driving motor for driving the disc brush. The clean water spraying assembly includes a clean water tank and a nozzle for exporting clean water from the clean water tank. The sewage suction assembly includes a vacuum motor and a sewage tank. The vacuum motor is used to suck sewage, and the sewage tank is used to store sewage sucked by the vacuum motor.

[0003] As shown in the Chinese patent document, the authorization publication number is CN215128118U. The application disclosed on December 14, 2021 a handheld dual-brush floor scrubber, including a base plate and a push rod for driving the base plate to move, a handle is fixedly provided on the upper end of the push rod, a brush disc motor assembly for rotating the disc brush is provided on the base plate, and a clean water tank is fixedly provided on the push rod, through which the liquid is transported to the disc brush, and the base plate is also provided with a sewage tank and a vacuum motor for sucking sewage.

[0004] The shortcomings of the existing technology are: the integration of the water spray circuit and the disc brush in the floor scrubber is poor, the water spray nozzle is usually located far in front of the disc brush, there is a long time interval between water cleaning and disc brush cleaning, and water is likely to diffuse out of the disc brush, causing water to accumulate on the ground and affecting the floor scrubbing efficiency of the floor scrubber. Utility Model Content

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a disc brush assembly and a floor scrubber, which can improve the integration of the water system and the power system in the floor scrubber, and the synchronization between the water spraying and the floor brushing of the floor scrubber is high, thereby improving the floor scrubbing efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A disc brush assembly comprises an outer shell and a connecting rod at one end extending into the inner shell, a transmission rod driven to rotate by a power element is arranged in the connecting rod, a transmission assembly is arranged in the outer shell, a disc brush is arranged on the outer shell, the transmission rod drives the disc brush to rotate through the transmission assembly, a first water pipe is integrated in the connecting rod, a nozzle for spraying water to the disc brush is arranged in the outer shell, and the nozzle is connected to the first water pipe through the water channel assembly.

[0008] The first water pipe and the transmission rod are integrated into the connecting rod, realizing the integration of the water system and the power system, and the overall integration of the floor scrubber is good. Water is directly supplied to the disc brush through the nozzle, and the synchronization of water spraying and floor brushing is high, which makes it difficult for water to remain on the ground, and the floor scrubbing efficiency is also improved.

[0009] Preferably, the transmission assembly includes a first gear shaft and a second gear shaft, the first gear shaft is inclined relative to the second gear shaft, the first gear shaft and the second gear shaft are provided with meshing bevel gear sets, the first gear shaft is transmission-connected to the transmission rod, and the disc brush is detachably connected to the outer end of the second gear shaft, so as to realize reliable transmission between the transmission rod and the disc brush.

[0010] Preferably, the connecting rod is arranged parallel to or coaxially with the first gear shaft, and the disc brush is coaxially sleeved on the second gear shaft. The transmission rod and the disc brush axis are arranged in an inclined manner by using the bevel gear set transmission. When the floor scrubber is moving and scrubbing, the disc brush can be tilted and extended to a farther position relative to the transmission rod. When the floor scrubber is a handheld floor scrubber, the brushing position of the disc brush can be farther away from the human body to avoid splashing of sewage on the human body.

[0011] Preferably, the transmission rod is rotatably arranged in the connecting rod, and the first water pipe is arranged on the side of the transmission rod tilted downward. The water pipe and the transmission rod are arranged in a partition in the connecting rod, and under the action of gravity, the water pipe automatically fits downward inside the connecting pipe, which can prevent the water pipe from interfering with the rotation of the transmission rod.

[0012] Preferably, the waterway assembly includes a first joint, a second joint, a second water pipe and a third water pipe, the first joint is used to connect the first water pipe and the second water pipe, the second joint is used to connect the second water pipe and the third water pipe, the outer end of the third water pipe is connected to the nozzle, and the second joint is arranged on the wall of the shell on one side of the second gear shaft. In an arrangement form of the waterway system in the shell, the first water pipe in the connecting rod and the second water pipe in the shell are connected through the first joint, and the first water pipe can be pre-integrated in the connecting rod to improve assembly efficiency.

[0013] Preferably, an isolation frame is fixedly arranged in the housing, and the isolation frame separates the waterway assembly and the transmission assembly, so as to realize separate protection of the waterway assembly and the transmission assembly.

[0014] Preferably, the isolation frame includes a first bearing seat for matching the first gear shaft and a second bearing seat and a third bearing seat for matching the second gear shaft. The first bearing seat, the second bearing seat and the third bearing seat are respectively provided with bearings. The second bearing seat and the third bearing seat are coaxially arranged. The isolation frame also includes a partition connecting the first bearing seat, the second bearing seat and the third bearing seat and covering the bevel gear set to form a separation between the waterway component and the transmission component. The isolation frame is provided with bearings, which can cover and hide the transmission parts matching the first gear shaft and the second gear shaft, and protect the transmission component.

[0015] Preferably, the disc brush includes a chassis and a round brush, a fixing seat is provided at the outer end of the second gear shaft, a truncated cone-shaped water distribution surface is provided at the outer periphery of the chassis, the taper angle of the water distribution surface faces the inside of the shell, a mounting hole is provided at the lower end of the shell, a water supply gap is provided between the hole wall of the mounting hole and the water distribution surface, and the nozzle sprays water toward the water distribution surface and the water supply gap. The chassis is a part of the disc brush, which rotates when washing the floor, and when the nozzle sprays water, the water distribution surface can rotate to distribute water, expand the water distribution area, and better cooperate with the rotation of the disc brush to wash the floor.

[0016] Preferably, the projection of the connecting rod on the cross section of the disc brush and the projection of the nozzle on the cross section of the disc brush are both located in the radial direction of the disc brush, and the projection of the connecting rod on the cross section of the disc brush is set at an angle relative to the projection of the nozzle on the cross section of the disc brush, with the projection of the connecting rod on the cross section of the disc brush as the starting side of the angle, and the projection of the nozzle on the cross section of the disc brush as the end side of the angle, along the direction of rotation of the disc brush, the angle ranges from 90 degrees to 180 degrees. The water sprayed from the nozzle can be directed to the front side of the scrubber to avoid spraying the operator at the rear side of the scrubber, thereby improving the user experience.

[0017] A floor scrubber includes the above-mentioned disc brush assembly and has all the beneficial effects of the above-mentioned disc brush assembly.

[0018] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a schematic diagram of the external structure of a disc brush assembly proposed in one embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the top view of the disc brush assembly in the axial direction of the disc brush provided in one embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of a disc brush assembly proposed in one embodiment of the utility model;

[0023] Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle;

[0024] Figure 5 yes Figure 3 The enlarged schematic diagram of point B in the middle;

[0025] Figure 6 It is a structural schematic diagram of one end of a connecting rod connected to a housing in a disc brush assembly proposed in one embodiment of the utility model.

[0026] In the figure: housing 1, mounting hole 2, connecting rod 3, first water pipe 4, transmission rod 5, spline groove 6, first gear shaft 7, spline 8, second gear shaft 9, fixing seat 10, clamping bolt 11, bevel gear set 12, isolation frame 13, first bearing seat 14, second bearing seat 15, third bearing seat 16, bearing 17, partition 18, first joint 19, connecting plate 20, connecting pipe 21, second joint 22, second water pipe 23, third water pipe 24, nozzle 25, mounting rod 26, mounting ring 27, disc brush 28, chassis 29, water distribution surface 30, water supply gap 31, round brush 32. DETAILED DESCRIPTION

[0027] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0028] In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] like Figures 1 to 6 As shown, a disc brush assembly proposed in one embodiment of the utility model includes a shell 1 and a connecting rod 3 at one end extending into the shell 1, a transmission rod 5 driven to rotate by a power element is provided in the connecting rod 3, a transmission assembly is provided in the shell 1, a disc brush 28 is provided on the shell 1, the transmission rod 5 drives the disc brush 28 to rotate through the transmission assembly, a first water pipe 4 is integrated in the connecting rod 3, a nozzle 25 for spraying water to the disc brush 28 is provided in the shell 1, and the nozzle 25 is connected to the first water pipe 4 through a water channel assembly.

[0030] The interior of the housing 1 is provided with a cavity, so as to realize the integration of the waterway component and the transmission component. The connecting rod 3 is a connecting piece connecting the housing 1, and is used for the arrangement of the transmission rod 5 and the first water pipe 4. The power element is a driving motor or a reciprocating swinging device driven by a linear mechanism, which realizes the driving of the rotation of the transmission rod 5. The transmission rod 5 is rotatably arranged in the connecting rod 3, which can be a direct rotation connection formed by the hole-shaft clearance fit, or an indirect rotation connection connecting the transmission rod 5 and the connecting rod 3 through the bearing 17. The power element drives the transmission rod 5 to rotate in the connecting rod 3, and the transmission rod 5 drives the disc brush 28 to rotate through the transmission assembly, so that the disc brush 28 brushes the ground.

[0031] In the prior art, the disc brush is usually rotatably arranged at the bottom of the casing and is directly driven by a motor. The disc brush is inconvenient to disassemble and replace. Since the structure of its transmission part is relatively simple, its water distribution usually adopts the method of setting a cavity in the casing and spraying water by equipping the cavity with a nozzle. In the present application, the disc brush is connected by a transmission assembly, and the pipeline method directly refers to the method of the prior art. Therefore, the first water pipe 4 integrated in the connecting rod 3 is used for water distribution. In this embodiment, the first water pipe 4 and the transmission rod 5 are both integrated in the connecting rod 3, realizing the integration of the water system and the power system, and the overall integration of the floor scrubber is good; water is directly supplied to the disc brush 28 through the nozzle 25, and the place where the water is sprayed is close to the place where the disc brush 28 cleans. The synchronization between water spraying and floor brushing is high, and it is not easy to leave water on the ground, and the floor washing efficiency is also improved.

[0032] One embodiment of the present invention provides a disc brush 28 structure, such as Figure 3 As shown, the transmission assembly includes a first gear shaft 7 and a second gear shaft 9. The first gear shaft 7 is inclined relative to the second gear shaft 9. The first gear shaft 7 and the second gear shaft 9 are provided with a meshing bevel gear set 12. The cooperation of the bevel gear set 12 enables the first gear shaft 7 and the second gear shaft 9 to be arranged in an inclined form, so as to facilitate the forward pushing of the disc brush 28 from the connecting rod 3 to the direction of the disc brush 28 to brush the ground. The first gear shaft 7 is connected to the transmission rod 5 in transmission connection. The axis of the connecting rod 3 is arranged parallel to the axis of the first gear shaft 7. The transmission rod 5 is rotatably arranged in the connecting rod 3. Specifically, in combination with Figure 2 and Figure 5It can be seen that the transmission rod 5 is rotatably arranged in the connecting rod 3, a spline groove 6 is provided inside the transmission rod 5, a spline 8 is provided on the upper end of the first gear shaft 7 to cooperate with the synchronous rotation of the transmission rod 5, and the spline groove 6 on the upper end of the transmission rod 5 is used to achieve synchronous rotation with the power element. The disc brush 28 is coaxially sleeved on the second gear shaft 9. The disc brush 28 is detachably connected to the outer end of the second gear shaft 9. Since the first gear shaft 7 and the second gear shaft 9 are tilted, and the first gear shaft 7 is parallel to the connecting rod 3, the connecting rod 3 is tilted relative to the disc brush 28. When the disc brush 28 is brushing the ground, the axis is usually in a vertical state, so the connecting rod 3 is in an inclined state, and the first water pipe 4 is arranged inside the connecting rod 3 parallel to the axis of the connecting rod 3. The transmission rod 5 and the first water pipe 4 in the connecting rod 3 are tilted relative to the ground. The first water pipe 4 in the connecting rod 3 is arranged on the side of the transmission rod 5 tilted downward. When the first water pipe 4 transports water, it will not be deformed downward due to the gravity of the water body and interfere with the transmission rod 5.

[0033] Further, such as Figure 3 As shown, an isolation frame 13 is fixedly provided in the housing 1, and the isolation frame 13 separates the waterway assembly and the transmission assembly. The isolation frame 13 includes a first bearing seat 14 for matching the first gear shaft 7 and a second bearing seat 15 and a third bearing seat 16 for matching the second gear shaft 9. The first bearing seat 14 and the second bearing seat 15 are respectively arranged adjacent to one of the bevel gear sets 12. Bearings 17 are respectively provided in the first bearing seat 14, the second bearing seat 15 and the third bearing seat 16. The second bearing seat 15 and the third bearing seat 16 are coaxially arranged, and the bevel gear arranged on the second gear shaft 9 is located between the second bearing seat 15 and the third bearing seat 16. The isolation frame 13 also includes a partition 18 connecting the first bearing seat 14, the second bearing seat 15 and the third bearing seat 16 and covering the bevel gear set 12 to form a separation between the waterway assembly and the transmission assembly. As shown Figure 3 As shown, the water channel assembly bypasses the outer side of the isolation frame 13, and the lower end of the second gear shaft 9 is an optical axis structure with a smaller diameter. The water channel assembly avoids the lower end of the second gear shaft 9, thereby achieving a reliable setting without interfering with the transmission assembly.

[0034] One embodiment of the present invention provides a disc brush 28 structure, such as Figure 3 As shown, the waterway assembly includes a first joint 19, a second joint 22, a second water pipe 23 and a third water pipe 24. The first joint 19 is used to connect the first water pipe 4 and the second water pipe 23. The second joint 22 is used to connect the second water pipe 23 and the third water pipe 24. The outer end of the third water pipe 24 is connected to the nozzle 25. The second joint 22 is arranged on the wall of the housing 1 on one side of the second gear shaft 9. The second water pipe 23 and the third water pipe 24 both adopt a hose structure, such as Figure 5As shown, the first joint 19 includes a connecting plate 20 bolted to the housing 1 and a connecting pipe 21 integral with the connecting plate 20. The outer side of the lower end of the connecting pipe 21 is provided with a plurality of frustum surfaces with cone angles facing outwards. The outer end of the connecting pipe 21 is inserted into the second water pipe 23 to form a waterway conduction. It can be understood that a frustum surface can also be provided on the outer side of the upper end of the connecting rod 3 to be inserted into the first water pipe 4 for waterway conduction. The second joint 22 adopts a combined structure of a connecting plate 20 and a connecting pipe 21 similar to the first joint 19. The setting of the first joint 19 can realize reliable connection between the first water pipe 4 and the second water pipe 23, and the setting of the second joint 22 can realize reliable connection between the second water pipe 23 and the third water pipe 24. The setting of the first joint 19 and the second joint 22 can facilitate the planning of the setting route of the waterway assembly in the housing 1, and facilitate the avoidance of the transmission assembly, thereby ensuring the smoothness of the waterway assembly.

[0035] One embodiment of the present invention provides a disc brush 28 structure, such as Figures 2 to 4 As shown, the disc brush 28 includes a chassis 29 and a round brush 32. The round brush 32 includes a plurality of bristle groups. A fixing seat 10 is provided at the outer end of the second gear shaft 9. A clamping bolt 11 is provided at the outer end axis of the second gear shaft 9. The fixing seat 10 is clamped by the clamping bolt 11. The chassis 29 is connected to the fixing seat 10 by studs. A truncated cone-shaped water distribution surface 30 is provided on the outer periphery of the chassis 29. The water distribution surface 30 is located at the upper end of the chassis 29. The cone angle of the water distribution surface 30 faces the inside of the outer shell 1. A mounting hole 2 is provided at the lower end of the outer shell 1. A water supply gap 31 is provided between the hole wall of the mounting hole 2 and the water distribution surface 30. The existence of the water supply gap 31 can ensure that the chassis 29 does not contact the outer shell 1, thereby avoiding collision and wear between the disc brush 28 and the outer shell 1 when rotating. As shown Figure 4 As shown, the nozzle 25 sprays water toward the water distribution surface 30 and the water supply gap 31. Figure 2 As shown, the rotation direction of the disc brush 28 is counterclockwise as indicated by the arrow, the projection of the connecting rod 3 on the cross section of the disc brush 28 and the projection of the nozzle 25 on the cross section of the disc brush 28 are both located in the radial direction of the disc brush 28, a mounting rod 26 is fixedly provided on the housing 1, a mounting ring 27 is fixed to the end of the mounting rod 26 by bolts, and the nozzle 25 is fixed on the mounting ring 27 to achieve relative fixation with the housing 1. The projection of the connecting rod 3 on the cross section of the disc brush 28 is arranged at an angle β relative to the projection of the nozzle 25 on the cross section of the disc brush 28, the projection of the connecting rod 3 on the cross section of the disc brush 28 is the starting side of the angle β, and the projection of the nozzle 25 on the cross section of the disc brush 28 is the ending side of the angle β, and along the rotation direction of the disc brush 28, the angle β ranges from 90 degrees to 180 degrees. Figure 2 In the example shown, the angle β is 135 degrees. When used in a floor scrubber, the direction of the connecting rod 3 toward the housing 1 is the forward direction of the floor scrubber, corresponding to Figure 2In the downward direction, when the floor scrubber moves forward, the nozzle 25 sprays water to the water supply gap 31 and the water distribution surface 30, and the disc brush 28 rotates counterclockwise to drive the water sprayed from the nozzle 25 toward the front side of the floor scrubber. Then, the floor scrubber immediately moves forward to ensure the synchronization of the position of the floor scrubbing and water spraying of the floor scrubber. In addition, since the water is sprayed on the front side of the floor scrubber, the personnel or the main equipment of the floor scrubber corresponds to the rear side of the disc brush 28, which can prevent water from splashing onto the personnel.

[0036] One of the embodiments of the present invention proposes a floor scrubber, including the disc brush 28 structure in any of the above embodiments. The floor scrubber includes a manual type in which a handle pushes the connecting rod 3 and a motorized type driven by a motor roller. Taking the manual type as an example, a water tank and a handle are provided on the connecting rod 3, and the handle integrates a power element, and the power element is manually switched on and off. When in use, a person holds the handle by hand and pushes the floor scrubber forward, and the floor scrubber sprays water forward, while the disc brush 28 rotates to complete floor scrubbing. Furthermore, a sewage tank can be provided on one side of the water tank on the connecting rod 3, and the sewage tank is connected to a negative pressure suction device, so that the sewage can be sucked away, thereby improving the cleaning efficiency.

[0037] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention shall be included in the scope of the claims.

Claims

1. A disc brush assembly, characterized in that: The invention comprises a housing (1) and a connecting rod (3) having one end extending into the housing (1); a transmission rod (5) driven to rotate by a power element is arranged in the connecting rod (3); a transmission assembly is arranged in the housing (1); a disc brush (28) is arranged on the housing (1); the transmission rod (5) drives the disc brush (28) to rotate via the transmission assembly; a first water pipe (4) is integrated in the connecting rod (3); a nozzle (25) for spraying water toward the disc brush (28) is arranged in the housing (1); the nozzle (25) is connected to the first water pipe (4) via a water channel assembly.

2. A disc brush assembly according to claim 1, characterized in that: The transmission assembly comprises a first gear shaft (7) and a second gear shaft (9); the first gear shaft (7) is inclined relative to the second gear shaft (9); the first gear shaft (7) and the second gear shaft (9) are provided with a meshing bevel gear set (12); the first gear shaft (7) is transmission-connected to the transmission rod (5); and the disc brush (28) is detachably connected to the outer end of the second gear shaft (9).

3. A disc brush assembly according to claim 2, characterized in that: The connecting rod (3) is arranged parallel to or coaxially with the first gear shaft (7), and the disc brush (28) is coaxially sleeved on the second gear shaft (9).

4. A disc brush assembly according to claim 3, characterized in that: The transmission rod (5) is rotatably arranged in the connecting rod (3), and the first water pipe (4) in the connecting rod (3) is arranged on the side of the transmission rod (5) that is inclined downward.

5. A disc brush assembly according to claim 2, characterized in that: The water channel assembly comprises a first joint (19), a second joint (22), a second water pipe (23) and a third water pipe (24); the first joint (19) is used to connect the first water pipe (4) and the second water pipe (23); the second joint (22) is used to connect the second water pipe (23) and the third water pipe (24); the outer end of the third water pipe (24) is connected to the nozzle (25); and the second joint (22) is arranged on the wall surface of the housing (1) on one side of the second gear shaft (9).

6. A disc brush assembly according to claim 2, characterized in that: An isolation frame (13) is fixedly provided inside the housing (1), and the isolation frame (13) separates the water channel component and the transmission component.

7. A disc brush assembly according to claim 6, characterized in that: The isolation frame (13) includes a first bearing seat (14) for matching the first gear shaft (7) and a second bearing seat (15) and a third bearing seat (16) for matching the second gear shaft (9). The first bearing seat (14), the second bearing seat (15) and the third bearing seat (16) are respectively provided with bearings. The second bearing seat (15) and the third bearing seat (16) are coaxially arranged. The isolation frame (13) also includes a partition (18) connecting the first bearing seat (14), the second bearing seat (15) and the third bearing seat (16) and covering the bevel gear set (12) to form a separation between the waterway component and the transmission component.

8. A disc brush assembly according to claim 2, characterized in that: The disc brush (28) comprises a chassis (29) and a round brush (32); a fixing seat (10) is provided at the outer end of the second gear shaft (9); a truncated cone-shaped water distribution surface (30) is provided on the outer periphery of the chassis (29); the cone angle of the water distribution surface (30) faces the inside of the housing (1); a mounting hole (2) is provided at the lower end of the housing (1); a water supply gap (31) is provided between the hole wall of the mounting hole (2) and the water distribution surface (30); and a nozzle (25) sprays water toward the water distribution surface (30) and the water supply gap (31).

9. A disc brush assembly according to claim 8, characterized in that: The projection of the connecting rod (3) on the cross section of the disc brush (28) and the projection of the nozzle (25) on the cross section of the disc brush (28) are both located in the radial direction of the disc brush (28); the projection of the connecting rod (3) on the cross section of the disc brush (28) is arranged at an angle relative to the projection of the nozzle (25) on the cross section of the disc brush (28); the projection of the connecting rod (3) on the cross section of the disc brush (28) is the starting side of the angle, and the projection of the nozzle (25) on the cross section of the disc brush (28) is the ending side of the angle; along the rotation direction of the disc brush (28), the angle ranges from 90 degrees to 180 degrees.

10. A floor scrubber, characterized in that: A disc brush assembly comprising any one of claims 1 to 9.

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