WO2024067653A1

WO2024067653A1 - Roller brush and cleaning device having roller brush

Info

Publication number: WO2024067653A1
Application number: PCT/CN2023/121814
Authority: WO
Inventors: 王红波; 门胜强
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2022-09-26
Filing date: 2023-09-26
Publication date: 2024-04-04

Abstract

The present application relates to a roller brush and a cleaning device having said roller brush. The roller brush comprises: a roller brush main body, a slit being formed on the roller brush main body, the slit extending in the axial direction of the roller brush main body, and an outer surface of the roller brush main body matching with the slit to form an opening; a blade assembly, which is provided with cutting teeth for cutting hair wound around the roller brush, the blade assembly being arranged in the slit, and the cutting teeth extending out of the opening and protruding out from the outer surface of the roller brush main body; protective teeth, which protrude out from the outer surface of the roller brush main body, so as to protect the blade assembly; the slit has two sides extending in the axial direction of the roller brush main body; and the protective teeth are only arranged on one side of the slit, and are arranged at intervals in the axial direction of the roller brush main body. By means of the protective teeth protrusion out from the outer surface of the roller brush main body is realized, so as to protect the blade assembly; and the effects of preventing the blade assembly from being damaged or from damaging other objects due to being exposed are achieved.

Description

Roller brush and cleaning device having same

Technical Field

[Corrected 21.11.2023 in accordance with Rule 26]
This application claims the priority of a Chinese patent application filed on September 26, 2022, with application number 202222551820.2, and invention name “A roller brush and a cleaning device having the same”, the entire contents of which are incorporated by reference into this application.

[Corrected 21.11.2023 in accordance with Rule 26]
The present application relates to the field of cleaning technology, and in particular to a roller brush and a cleaning device having the same.

Background technique

At present, people are accustomed to using surface cleaning equipment to clean indoor environments. During the cleaning process, hair will inevitably be entangled on the roller brush. The tangled hair may reduce the efficiency of the roller brush and may cause damage to the motor and/or drive system of the roller brush.

An existing surface cleaning device is provided with fixed teeth on the surface of a roller brush, and a cutting blade capable of reciprocating relative to the roller brush body is provided in a slit on one side of the fixed teeth. During the movement of the cutting blade, the teeth of the cutting blade can interlace with the fixed teeth to cut off the tangled hair on the surface of the roller brush.

However, in such surface cleaning devices, since the fixed teeth are directly formed on the surface of the roller brush, during operation, only the cutting blade reciprocates relative to the roller brush body, which results in a long reciprocating stroke of the cutting blade relative to the roller brush body. Accordingly, in order to cover a longer stroke, the driving component for driving the cutting blade to move needs to reciprocate over a longer distance, which means that the reciprocating motion-related components wear out faster, which is not conducive to the long-term use of the roller brush, thereby limiting the service life of the surface cleaning device to a certain extent.

Summary of the invention

The purpose of the present application is to provide a roller brush for use in cleaning equipment and a cleaning equipment having the same, wherein the roller brush has a hair cutting function, and by improving its structure, the movement stroke of the blade is shortened, thereby facilitating hair cleaning. The roller brush in the present application can be used in cleaning equipment such as cleaning robots and handheld sweepers.

The present application provides a roller brush for use in cleaning equipment, comprising: a roller brush body, the roller brush body being provided with a slit, the slit extending along the axis direction of the roller brush body; an opening formed on the outer surface of the roller brush body matching the slit;

a blade assembly, provided with cutting teeth for cutting hair wound around the roller brush, the blade assembly being arranged in the slit, the cutting teeth extending out of the opening and protruding out of the outer surface of the roller brush body;

Protective teeth protrude from the outer surface of the roller brush body to protect the blade assembly;

The slit has two sides extending along the axial direction of the roller brush body; the protective teeth are only arranged on one side of the slit and are spaced apart along the axial direction of the roller brush body.

In one embodiment of the present application, the two sides of the slit include an early contact side and a late contact side, and the cutting teeth are located between the early contact side and the late contact side; the early contact side refers to the side that contacts the cleaned object earlier than the cutting teeth during the rotation of the roller brush to perform cleaning work; the late contact side refers to the side that contacts the cleaned object later than the cutting teeth during the rotation of the roller brush to perform cleaning work; the protective teeth are only arranged on the early contact side.

In one embodiment of the present application, in the radial direction of the cross section of the roller brush, the protective teeth protrude further from the outer surface of the roller brush body than the cutting teeth.

In one embodiment of the present application, in the radial direction of the cross section of the roller brush, the height difference of the guard teeth protruding from the cutting teeth ranges from 0.5 mm to 2 mm.

In one embodiment of the present application, the protective tooth includes an inner side surface facing the cutting tooth and extending along the axial direction of the roller brush body, and the spacing between the cutting tooth and the inner side surface ranges from 0.05 mm to 0.15 mm.

In one embodiment of the present application, the roller brush includes two slits in which the blade assembly is disposed, and the two slits are both provided with the protective teeth only on the early contact side.

In one embodiment of the present application, the blade assembly is configured to move under the drive of a driving force to cut off the hair entangled on the surface of the roller brush body.

In one embodiment of the present application, two groups of the blade assemblies are included, and the two groups of the blade assemblies are stacked in the slit.

In one embodiment of the present application, the two groups of blade assemblies include a first blade assembly and a second blade assembly, and the first blade assembly and the second blade assembly are configured to reciprocate in opposite directions at the opening; during the movement of the first blade assembly and the second blade assembly, the cutting teeth of the first blade assembly are staggered with the cutting teeth of the second blade assembly during at least a portion of the time period to cut off the hair entangled on the surface of the roller brush body.

In one embodiment of the present application, a first slit and a second slit relative to each other are provided on the roller brush body, the first blade assembly includes a first blade and a second blade, the second blade assembly includes a third blade and a fourth blade, the first blade and the third blade are stacked in the first slit, and the second blade and the fourth blade are stacked in the second slit.

In one embodiment of the present application, the first blade and the second blade are connected as a whole, and the third blade and the fourth blade assembly are connected as a whole; or, the first blade, the second blade, the third blade and the fourth blade are independent of each other.

In one embodiment of the present application, the first blade assembly and the second blade assembly each include a plurality of evenly arranged cutting teeth, the tooth spacing between adjacent cutting teeth on the first blade assembly is T1, the tooth spacing between adjacent cutting teeth on the second blade assembly is T2, and T1>T2, and the movement stroke L of the first blade assembly and the second blade assembly relative to the roller brush body respectively satisfies T2≥L≥0.5T1.

In one embodiment of the present application, the first blade assembly and the second blade assembly each include a plurality of evenly arranged cutting teeth, the tooth spacing between adjacent cutting teeth on the first blade assembly is T1, the tooth spacing between adjacent cutting teeth on the second blade assembly is T2, and T1>T2, and the movement stroke L of the first blade assembly or the second blade assembly relative to the roller brush body satisfies, L≥0.5T1.

In one embodiment of the present application, an anti-wear strip is provided in the slit, and the anti-wear strip is located between the roller brush body and the first blade assembly and/or the second blade assembly.

In one embodiment of the present application, a blade gap adjustment mechanism is provided in the roller brush body, and the blade gap adjustment mechanism is configured to adjust the fit between the first blade assembly and the second blade assembly based on elastic deformation.

In one embodiment of the present application, the blade gap adjustment mechanism includes an elastic member and a mounting groove matching the elastic member, one end of the elastic member is installed in the mounting groove, and the other end of the elastic member abuts against the anti-wear strip.

In one embodiment of the present application, it also includes a transmission mechanism connected to the blade assembly, the transmission mechanism is arranged in the inner cavity of the roller brush body, and the transmission mechanism includes a cam lug transmission structure or a gear rack transmission structure.

The present application also provides a roller brush, including a roller brush body, a slit being provided on the roller brush body, and the slit extending along the axial direction of the roller brush body; an opening is formed on the outer surface of the roller brush body to match the slit; a first blade assembly and a second blade assembly are provided in the slit, and the first blade assembly and the second blade assembly are configured to reciprocate in opposite directions at the opening; during the movement of the first blade assembly and the second blade assembly, the cutting teeth of the first blade assembly are staggered with the cutting teeth of the second blade assembly in at least part of the time period to cut off the hair entangled on the surface of the roller brush body.

Furthermore, a first slit and a second slit relative to each other are provided on the roller brush body, the first blade assembly includes a first blade and a second blade, the second blade assembly includes a third blade and a fourth blade, the first blade and the third blade are stacked in the first slit, and the second blade and the fourth blade are stacked in the second slit.

Furthermore, two opposite ends of the roller brush body are respectively provided with a first end cover and a second end cover, the first end cover is used to fix the roller brush body to the cleaning device, the second end cover is transmission connected to a driving motor arranged on the cleaning device, the driving motor is configured to drive the second end cover and the roller brush body to rotate relative to the first end cover, and a driving assembly is provided in the roller brush body, and the driving assembly is configured to convert the rotation of the driving motor into linear motion of the first blade assembly and the second blade assembly.

Furthermore, the driving assembly further comprises a reset spring, and the reset spring is configured to drive the first blade assembly and the second blade assembly to reset when the power of the driving motor is withdrawn.

Furthermore, the first blade and the second blade are connected as one body, and the third blade and the fourth blade are connected as one body.

Furthermore, the driving assembly includes a first cam having a first cam groove on its surface, and a first stop block and a second stop block relative to each other are provided in the first cam groove. The first stop block is connected to the first blade assembly to drive the first blade assembly to move in a first direction, and the second stop block is connected to the second blade assembly to drive the second blade assembly to move in the opposite direction of the first direction.

Furthermore, the driving assembly includes a gear and a first rack and a second rack meshing with the gear. The first rack and the second rack are radially arranged at two opposite ends of the gear and are respectively connected to the first blade assembly and the second blade assembly, driving the first blade assembly and the second blade assembly to move in opposite directions.

Furthermore, the driving assembly also includes a push rod and a cam assembly, the first rack is connected to one end of the push rod, and the cam assembly is arranged at the other end of the push rod, and the push rod and the cam assembly are configured to convert the rotation of the driving motor into linear motion of the first rack and the second rack to provide external input power.

Further, the first blade and the second blade are independent of each other, and the third blade and the fourth blade are independent of each other.

Further, the driving assembly includes a first driving unit and a second driving unit, the first driving unit includes a first cam with a first cam groove on the surface, the second driving unit includes a second cam with a second cam groove on the surface, the first cam groove is provided with a first block and a second block relative to each other, the second cam groove is provided with a third block and a fourth block relative to each other, the first block and the second block are respectively connected to the first blade and the fourth blade, and the third block and the fourth block are respectively connected to the third blade and the second blade.

Furthermore, the first blade assembly and the second blade assembly each include a plurality of evenly arranged cutting teeth, the tooth spacing between adjacent cutting teeth on the first blade assembly is T1, the tooth spacing between adjacent cutting teeth on the second blade assembly is T2, and T1>T2, and the movement stroke L of the first blade assembly or the second blade assembly relative to the roller brush body satisfies: L≥0.5T1.

Furthermore, the first blade assembly and the second blade assembly each include a plurality of evenly arranged cutting teeth, the tooth spacing between adjacent cutting teeth on the first blade assembly is T1, the tooth spacing between adjacent cutting teeth on the second blade assembly is T2, and T1>T2, and the movement stroke L of the first blade assembly and the second blade assembly relative to the roller brush body respectively satisfies: T2≥L≥0.5T1.

Furthermore, an anti-wear strip is provided in the slit, and the anti-wear strip is located between the roller brush body and the first blade assembly and/or the second blade assembly.

Furthermore, a blade gap adjustment mechanism is provided in the roller brush body, and the blade gap adjustment mechanism is configured to adjust the fit between the first blade assembly and the second blade assembly based on elastic deformation.

Furthermore, the blade gap adjustment mechanism comprises an elastic member and a mounting groove matching the elastic member, one end of the elastic member is mounted in the mounting groove, and the other end of the elastic member abuts against the anti-wear strip.

In one of the embodiments, a fixing tooth is provided on one side of the slit, and the fixing teeth are arranged at intervals along the axial direction of the roller brush body.

Preferably, during the rotation of the roller brush body, the fixed teeth are provided on a side edge of the slit that first contacts the object to be cleaned.

The present application also provides a cleaning device, which includes the above-mentioned roller brush and a driving member for providing driving force to the roller brush so that the roller brush rotates to perform cleaning work.

In summary, the roller brush of the present application has protective teeth that protrude from the outer surface of the roller brush body to protect the blade assembly; it has the function of preventing the blade assembly from being damaged or damaging other objects due to exposure.

The present application also arranges two blade assemblies in the slit of the roller brush body, and configures them to reciprocate in opposite directions in the axial direction of the roller brush body. The movement of the blades on the roller brush body is shortened through the relative movement of the blade assemblies, thereby slowing down the wear rate of the driving components on the roller brush that drive the blade assemblies to move. When the roller brush is used in a cleaning device, it helps to extend the service life of the cleaning device.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a structural diagram of a roller brush provided in one embodiment of the present application.

Fig. 2 is a schematic structural diagram of a cross section of a roller brush provided by another embodiment of the present application obtained by sectioning the roller brush along the D-D section line shown in Fig. 1 .

FIG. 3 is a structural diagram of a partially disassembled structure of a roller brush according to an embodiment of the present application.

FIG. 4 is a structural diagram of a partially disassembled structure of a roller brush according to another embodiment of the present application.

FIG5 is a structural diagram of the installation structure of the roller brush on the cleaning device according to an embodiment of the present application.

FIG. 6 is a structural diagram of the roller brush portion shown in FIG. 3 .

FIG. 7 is a structural diagram of a disassembled structure of a roller brush portion according to another embodiment of the present application.

FIG. 8 is a structural diagram of a disassembled structure of a roller brush portion of another embodiment of the present application.

FIG. 9 is a structural diagram of the matching structure of a blade assembly according to an embodiment of the present application.

FIG. 10 is a structural diagram of another roller brush provided in an embodiment of the present application.

Fig. 11 is a schematic cross-sectional view of the roller brush shown in Fig. 10 taken along the E-E section.

FIG. 12 is an exploded view of another roller brush provided in an embodiment of the present application.

FIG. 13 is a partial enlarged view of the framed area of the roller brush in FIG. 12

FIG. 14 is a view obtained by flipping the exploded view in FIG. 12 180 degrees along a reference line perpendicular to the axis of the roller brush.

Detailed ways

The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

In the description of this application, unless otherwise clearly specified and limited, the terms "set", "install", "connect", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

The terms "first", "second", "third", "fourth", etc. in the description and claims of the present application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence.

The embodiment of the present application provides a roller brush. As shown in FIG1 , the roller brush 10 includes a roller brush body 11. The roller brush body 11 is cylindrical and is provided with a slit 12. The slit 12 extends along the axis direction of the roller brush body 11. An opening is formed on the outer surface of the roller brush body to match the slit. The roller brush includes a blade assembly, and the blade assembly is provided with cutting teeth for cutting hair wrapped around the roller brush. The blade assembly is arranged in the slit, and the cutting teeth extend out of the opening and protrude from the outer surface of the roller brush body to cut the hair wrapped around the outer surface of the roller brush body.

In one embodiment, the roller brush includes two sets of blade assemblies, that is, a first blade assembly and a second blade assembly are provided in the slit 12, and the first blade assembly and the second blade assembly are configured to reciprocate in opposite directions at the opening; during the movement of the first blade assembly and the second blade assembly, the cutting teeth of the first blade assembly and the cutting teeth of the second blade assembly are staggered at least in part of the time period to cut off the hair entangled on the surface of the roller brush body 11. In this embodiment, by providing two blade assemblies in the slit 12 of the roller brush body 11, the two blade assemblies reciprocate in opposite directions in the axial direction of the roller brush body 11, shortening the movement stroke of the blade assembly on the roller brush body, thereby slowing down the wear speed of the driving component on the roller brush that drives the blade assembly to move, so that when the roller brush is used in a cleaning device, it helps to extend the service life of the cleaning device. The above-mentioned first blade assembly and the second blade assembly can be collectively referred to as blade assemblies. It can also be said that in this embodiment, the roller brush includes two sets of blade assemblies. In other embodiments, the roller brush may also include only one blade assembly, or multiple blade assemblies.

In the embodiment of the present application, the slit 12 can be set only on one side of the roller brush body 11. In a preferred embodiment, the slit 12 is set on both sides of the roller brush body 11; thereby, the hair wrapped around the roller brush body 11 can be cut at different positions of the roller brush body 11, thereby optimizing the cutting effect.

Furthermore, the roller brush 10 further comprises protective teeth protruding from the outer surface of the roller brush body 11 to protect the blade assembly. The slit 12 has two sides extending along the axial direction of the roller brush body.

In one embodiment, a row of fixed teeth 13 are provided on both sides of the opening of the slit 12 of the roller brush body 11, and the height of the fixed teeth 13 extending in the radial direction of the roller brush body is not less than the height of the first blade assembly and the second blade assembly extending out of the opening. It can be understood that the fixed teeth 13 can prevent the cutting teeth extending out of the opening from being directly exposed to the outside without protection, and can make the entangled hair distributed in the gap of the fixed teeth, so that the first blade assembly and the second blade assembly can cut the hair in the gap of the fixed teeth when they are staggered, which helps to improve the fit between the hair and the cutting teeth and improve the cutting efficiency. Because the cutting teeth of the above-mentioned blade assembly extend out of the opening, if there is no fixed tooth for protection, on the one hand, the blade assembly will be easily damaged, and on the other hand, the exposed blade assembly will also easily scratch external objects, such as carpets or floors. We set fixed teeth to protect the blade assembly and prevent the blade assembly from being damaged or damaging other objects due to exposure. Therefore, the above-mentioned fixed teeth can also be called protective teeth.

In another embodiment, protective teeth may be provided only on one side of the slit 12. Specifically, as shown in FIGS. 10 to 14 , the protective teeth 13 are provided only on one side of the slit and are arranged at intervals along the axial direction of the roller brush body. The roller brush can be applied to a cleaning device, comprising: a roller brush body 11, a slit 12 is provided on the roller brush body, and the slit 12 extends along the axial direction of the roller brush body; an opening is formed on the outer surface of the roller brush body 11 to match the slit; a blade assembly is provided with cutting teeth for cutting hair wrapped around the roller brush, the blade assembly is provided in the slit 12, the cutting teeth extend out of the opening and protrude from the outer surface of the roller brush body 11; protective teeth 13 protrude from the outer surface of the roller brush body 11 to protect the blade assembly; the slit 12 has two sides extending along the axial direction of the roller brush body 11; the protective teeth 12 are provided only on one side of the slit 12 and are arranged at intervals along the axial direction of the roller brush body 11.

Preferably, the two sides of the slit include an early contact side and a late contact side, and the cutting teeth are located between the early contact side and the late contact side; the early contact side refers to the side that contacts the cleaned object earlier than the cutting teeth during the rotation of the roller brush to perform cleaning work; the late contact side refers to the side that contacts the cleaned object later than the cutting teeth during the rotation of the roller brush to perform cleaning work; the protective teeth are only arranged on the early contact side.

Preferably, in the radial direction of the cross section of the roller brush, the guard teeth protrude more from the outer surface of the roller brush body than the cutting teeth.

Preferably, in the radial direction of the cross section of the roller brush, the height difference of the guard teeth protruding from the cutting teeth ranges from 0.5 mm to 2 mm.

Preferably, the guard tooth comprises an inner side surface which faces the cutting tooth and extends along the axial direction of the roller brush body, and the spacing between the cutting tooth and the inner side surface ranges from 0.05 mm to 0.15 mm.

Preferably, the roller brush comprises two slits in which the blade assembly is disposed, and the two slits are provided with the protective teeth only on the early contact side. Exemplarily, the late contact side is not provided with protective teeth, and preferably, the late contact side forms a smooth curved surface, which may be slightly higher than the outer surface of the roller brush body in some cases.

As shown in Figures 10 to 14 for details, the roller brush includes: a roller brush body 10, the roller brush body 10, a blade assembly and protective teeth, wherein a slit is provided on the roller brush body 10, the slit extends along the axial direction of the roller brush body, and in the axial direction of the roller brush body, the slit has two sides extending along the axial direction of the roller brush body; the protective teeth are only arranged on one side of the slit and are arranged at intervals along the axial direction of the roller brush body; the slit is matched on the outer surface of the roller brush body 11 to form an opening; the blade assembly is provided with cutting teeth for cutting hair wrapped around the roller brush, the blade assembly is arranged in the slit, and the cutting teeth extend out of the opening and protrude from the outer surface of the roller brush body; the protective teeth on the roller brush body protrude from the outer surface of the roller brush body to protect the blade assembly.

In an exemplary application, the slit is arranged on the roller brush body 11 along the axial direction of the roller brush, and a plurality of protective teeth are disposed near the edge of the slit and spaced apart along the direction of the opening formed by the slit on the roller brush body. Preferably, the protective teeth are on one side of the slit in relation to the rotation direction of the roller brush 10. In one embodiment, the protective teeth are located on one side of the slit 12, and during the rotation of the roller brush body, the edge of the slit 12 that first contacts the cleaned object is provided with protective teeth. In another embodiment, the protective teeth may be arranged on one side of the slit 12, and within a range of 0 to 0.5 mm from the edge of the opening formed by the slit 12 on the roller brush body 11. In the example of FIG. 10 , it can be seen from the screenshot shown in FIG. 11 that the distance between the protective teeth and the edge of the opening in this example is 0.

In the embodiment of the present application, the outermost end of the protective tooth (the end away from the axis of the roller brush) can be flush with the end of the cutting tooth away from the axis of the roller brush, and preferably, the outermost end of the protective tooth protrudes from the end of the cutting tooth away from the axis of the roller brush. In a specific embodiment, the height of the cutting tooth protruding from the surface of the roller brush body is lower than the height of the protective tooth protruding from the surface of the roller brush body, and forms a height difference h1 between 0.5mm and 2mm. The height difference h1 can refer to the marking in Figure 11. This can not only meet the safety requirements of the cutting teeth in the vertical direction, but also better balance the hair cutting function of the roller brush and the limited installation space requirements on the cleaning device. In the same or other embodiments, the protective tooth forms a flat cross-section on the side facing the cutting tooth, and the spacing between the cutting tooth and the cross-section is g1. Preferably, the value range of g1 is 0.05mm to 0.15mm. The spacing g1 can refer to the marking in Figure 11.

In a preferred embodiment, please refer to Figures 12-14, the roller brush 10 includes a first barrel 111 and a second barrel 112, the first barrel 111 and the second barrel 112 are independent of each other, and after being assembled, they form a cylindrical roller brush body 11. It can be understood that the joint between the first barrel 111 and the second barrel 112 forms a slit 12 on the roller brush body 11, and an opening is formed on the outer surface of the roller brush body. A plurality of protective teeth are spaced and distributed in the axial direction of the roller brush body, and the protective teeth are located at the position adjacent to the joint of each part of the barrel, that is, close to one side edge of the slit. Preferably, the distance between the protective teeth and the opening edge is 0, but in other embodiments, the protective teeth 13 can be located within 0.5 mm of the opening edge of the drum. It should be noted that in the examples of Figures 12 and 13, only one side of the two edges adjacent to the joint 12 on the first barrel 111 and the second barrel 112 are provided with protective teeth. In practical applications, the first barrel 111 and the second barrel 112 can be of completely identical structure, and the two parts share a mold, which can not only save production and processing costs, but also ensure the consistency of the two parts of the roller brush body 11. This consistency is reflected in the rotation process of the roller brush. For example, when the roller brush is used on a cleaning device and cleans the surface of the cleaned object by rolling in contact with the cleaned object, the roller brush will not vibrate during the rotation of the cleaning device, and has good dynamic balance characteristics. For users, the roller brush will not generate excessive or abnormal noise during cleaning, which helps to optimize the user experience.

Unlike the one-piece barrel structure which requires a slit to be set on the roller brush body, the slit for accommodating the blade assembly is formed by directly using the joint of the first barrel 111 and the second barrel 112, thereby avoiding a complicated production process. In addition, the first barrel 111 and the second barrel 112 can be opened, making it easier to assemble the blade assembly on the roller brush.

Further, as shown in Figures 12-14, the blade assembly includes a first blade assembly 40 and a second blade assembly 50, and the two groups of the blade assemblies are stacked in the slit formed by the splicing of the first barrel 111 and the second barrel 112. The first blade assembly and the second blade assembly are configured to reciprocate in opposite directions at the opening; during the movement of the first blade assembly and the second blade assembly, the cutting teeth of the first blade assembly and the cutting teeth of the second blade assembly are staggered at least in part of the time period to cut off the hair entangled on the surface of the roller brush body. It should be noted that the dotted lines of the roller brush cavity part in Figures 12-14 represent the key structures that do not need to be explained in this example, and the specific structures are not shown in the figure. The structure in this area can refer to the corresponding structure in the aforementioned embodiment. In particular, in this example, the first blade assembly 40 and the second blade assembly 50 are both integrated blade structures. After the first blade assembly 40 and the second blade assembly 50 are installed on the roller brush, they can penetrate the splicing surface of the first barrel 111 and the second barrel 112, and extend from the opening of the roller brush body corresponding to the two slits on the opposite sides of the roller brush. Compared with respectively stacking two independent blades in the two slits of the drum, the transmission structure of the blades can be simplified.

In an exemplary application, the blade assembly is configured to move under the drive of a driving force to cut off the hair entangled on the surface of the roller brush body. The driving force can come from the outside of the roller brush or be located in the installation cavity of the roller brush, for example, the roller brush receives the driving force from the motor outside the roller brush or receives the driving force provided by the motor arranged in the inner cavity of the roller brush.

In an exemplary application, two sets of the blade assemblies are included, and the two sets of the blade assemblies are stacked in the slit.

In an exemplary application, the two sets of blade assemblies include a first blade assembly and a second blade assembly, and the first blade assembly and the second blade assembly are configured to reciprocate in opposite directions at the opening; during the movement of the first blade assembly and the second blade assembly, the cutting teeth of the first blade assembly are staggered with the cutting teeth of the second blade assembly for at least a portion of the time period to cut off the hair entangled on the surface of the roller brush body.

In an exemplary application, the roller brush body is provided with a first slit and a second slit opposite to each other, the first blade assembly includes a first blade and a second blade, the second blade assembly includes a third blade and a fourth blade, the first blade and the third blade are stacked in the first slit, and the second blade and the fourth blade are stacked in the second slit.

In an exemplary application, the first blade and the second blade are connected as a whole, and the third blade and the fourth blade assembly are connected as a whole; or, the first blade, the second blade, the third blade and the fourth blade are independent of each other.

As shown in FIG. 2 , the roller brush body 11 is composed of two semi-cylindrical parts, and the first slit 121 and the second slit 122 opposite to each other in the diameter direction of the roller brush body 11 are arranged at the position where the two semi-cylinders are buckled, and two openings matching the slit 12 are formed on the outer surface of the roller brush body 11. The first blade assembly 40 and the second blade assembly 50 are stacked in the first slit 121 and the second slit 122, and are configured to move in the aforementioned manner, so that the two sets of blades are staggered during the movement to cut hair.

In other embodiments, the first slit 121 and the second slit 122 may not be on a plane passing through the axis on the roller brush body 11, for example, an angle not equal to 180 degrees is formed between the plane passing through the axis where the first slit 121 is located and the plane passing through the axis where the second slit 122 is located.

In some embodiments, the first blade assembly and the second blade assembly can be configured to synchronously reciprocate in opposite directions in a synchronous or asynchronous manner. When the first blade assembly and the second blade assembly of the blade assembly synchronously reciprocate in opposite directions in a synchronous manner, the design difficulty of the blade assembly drive device can be reduced.

In some embodiments, the first blade assembly 40 and the second blade assembly 50 are each provided with a plurality of evenly distributed cutting teeth 43 , as shown in FIG. 3 .

Further, in the roller brush 10 shown in FIG3 , the first blade assembly 40 includes a first blade 41 and a second blade 42 that are independent of each other, and the second blade assembly 50 includes a third blade 51 and a fourth blade 52 that are independent of each other. The first blade 41 and the third blade 51 can be stacked in the first slit 121, and the second blade 42 and the fourth blade 52 can be stacked in the second slit 122. During the movement of the first blade assembly 40 and the second blade assembly 50, the first blade 41 is staggered with the third blade 51 in at least part of the time period to cut off the hair on one side of the roller brush body 11, and the second blade 42 is staggered with the fourth blade 52 in at least part of the time period to cut off the hair on the other side of the roller brush body 11.

In another optional embodiment, as shown in FIG4 , the first blade assembly 40 is integrally provided, including a first portion 40a located in one slit and a second portion 40b located in another slit. The second blade assembly 50 is integrally provided, including a first portion 50a located in one slit and a second portion 50b located in another slit. Based on the aforementioned similar structure, the first blade assembly 40 and the second blade assembly are mounted on the roller brush 10 in a stacked manner, and the first slit and the second slit are provided at corresponding positions on the roller brush to accommodate the blade assemblies. Exemplarily, the first portion 40a of the first blade assembly 40 and the first portion 50a of the second blade assembly 50 are both located in the first slit, and the first portion 40b of the first blade assembly 40 and the first portion 50b of the second blade assembly 50 are both located in the second slit. The first blade assembly and the second blade assembly are configured to synchronously reciprocate in opposite directions in a synchronous or asynchronous manner.

The roller brush of the embodiment of the present application can be used in a cleaning device. During the cleaning process of the cleaning device, the driving device of the roller brush provides a driving force to rotate the roller brush. During the rotation of the roller brush, the roller brush contacts the object to be cleaned to absorb or lift foreign matter such as dust. Further, the first blade assembly and the second blade assembly of the roller brush 10 in the embodiment of the present application are configured to be able to synchronously reciprocate in opposite directions in a synchronous or asynchronous manner under the drive of the driving device of the roller brush.

In one embodiment, please refer to FIG. 5 , the roller brush 10 is mounted on the cleaning device 1, and the cleaning device 1 also includes a driving device for the roller brush 10, and the driving device includes a driving motor 30 and a transmission box 20. Among them, the two opposite ends of the roller brush body 11 in the axial direction are respectively provided with a first end cover 60 and a second end cover 70. Among them, the first end cover 60 is used to fix the roller brush body 11 to the cleaning device 1, and the second end cover 70 is connected to the driving motor 30 provided on the cleaning device 1 through the transmission box 20. A driving assembly is provided in the roller brush body 11, and the driving assembly is configured to convert the rotation of the driving motor 30 into the linear motion of the first blade assembly 40 and the second blade assembly 50.

Specifically, the first end cover 60 is fixed to the housing of the cleaning device, the second end cover 70 is fixedly connected to the roller brush body 11, and the second end cover 70 is transmission-connected to the drive motor 30, so that the drive motor 30 can drive the second end cover 70 and the roller brush body 11 to rotate relative to the first end cover 60.

In a specific embodiment, since both ends of the roller brush body 11 are open and are respectively provided with a first end cover 60 and a second end cover 70, in order to prevent debris or hair from entering the interior of the roller brush body 11, sealing covers 93 are also provided at both ends of the roller brush body 11. The inner ring of the sealing cover 93 is interference fit with the roller brush body 11, and the outer ring of the sealing cover 93 is provided with a stopper 931 which extends obliquely from the end of the roller brush body 11 to the middle and expands radially outward. The stopper 931 can block rolling debris or hair from entering the interior of the roller brush body 11 through the end of the brush body 11.

In an exemplary application, please refer to Figures 3, 5 and 6. The first blade assembly 40 of the roller brush 10 includes a first blade 41 and a second blade 42 that are independent of each other, and the second blade assembly 50 includes a third blade 51 and a fourth blade 52 that are independent of each other. The first blade 41 and the third blade 51 are stacked in the first slit 121, and the second blade 42 and the fourth blade 52 are stacked in the second slit 122. The drive assembly includes a first drive unit 91 and a second drive unit 92. The roller brush 10 also includes a deceleration device 80. Among them, the deceleration device 80, the first drive unit 91 and the second drive unit 92 are all arranged inside the roller brush body 11. The deceleration device 80 is used to reduce the rotation speed of the external driving force provided by the drive motor. The first drive unit 91 and the first drive unit 92 are used to convert the rotation of the drive motor 30 into the linear motion of the first blade assembly 40 and the second blade assembly 50.

Preferably, the transmission mechanism further includes a deceleration device. Referring to FIG. 3 , FIG. 5 and FIG. 6 , the deceleration device 80 is disposed at one end of the roller brush body 11 near the first end cover 60, and may be a planetary deceleration device or a gear deceleration device. The input end of the deceleration device 80 is connected to the roller brush body 11 and can rotate with the roller brush body 11. The output end of the deceleration device 80 is connected to the input end of the first drive unit 91 and can drive the input end of the first drive unit 91 to rotate. The deceleration device 80 and the first drive unit 91 are connected through a first joint 81 disposed at the output end of the deceleration device 80 and a second joint 910 disposed at the input end of the first drive unit 91. One of the first joint 81 and the second joint 910 is provided with a card block, and the other of the first joint 81 and the second joint 910 is provided with a card slot, and the output end of the deceleration device 80 is connected to the input end of the first drive unit 91 through the cooperation of the card block and the card slot.

Specifically, the first driving unit 91 includes a first cam 912 with a first cam groove 911 on the surface, and a first stopper 913 and a second stopper 914 disposed in the first cam groove 911. The second driving unit 92 includes a second cam 922 with a second cam groove 921 on the surface, and a third stopper 923 and a fourth stopper 924 disposed in the second cam groove 921. The output end of the first cam 912 and the input end of the second cam 922 are connected by a joint group similar to the first joint 81 and the second joint 910 described above, so that the second cam 922 can rotate with the first cam 912. At the same time, in order to maintain the rotation stability of the first cam 912 and the second cam 922, support bearings 915 are provided at both ends of the first cam 912 and the second cam 922, respectively.

Exemplarily, the first cam 912 and the second cam 922 in this embodiment are both cylindrical cams, and the first cam groove 911 and the second cam groove 921 are respectively opened on the cylindrical surfaces of the first cam 912 and the second cam 922, and the first cam groove 911 and the second cam groove 921 have the same profile but opposite directions, that is, the highest point and the lowest point of the cam surface of the first cam groove 911 are axially aligned with the lowest point and the highest point of the cam surface of the second cam groove 921. In addition, the distance between the highest point and the lowest point of the cam surface of the first cam 912 and the distance between the highest point and the lowest point of the cam surface of the second cam 922 are both equal to the movement stroke L of the blade assembly. Further, the movement stroke L can be equal to the length L0 of the active distance reserved for the blade assembly on the roller brush body 11.

Based on the above, in this example, the first stopper 913 and the second stopper 914 are arranged opposite to each other (arranged at the upper part and the lower part of the first cam groove 911 in the figure respectively), and are connected to the first blade 41 in the first slit 121 and the fourth blade 52 in the second slit 122 respectively, and the third stopper 923 and the fourth stopper 924 are arranged opposite to each other (arranged at the upper part and the lower part of the second cam groove 921 in the figure respectively), and are connected to the third blade 51 in the first slit 121 and the second blade 42 in the second slit 122 respectively. In this way, when the reduction gear 80 drives the first cam 912 and the second cam 922 to rotate, the first stopper 913 and the third stopper 923 respectively drive the first blade 41 and the third blade 51 in the first slit 121 to synchronously reciprocate in opposite directions, and the second stopper 914 and the fourth stopper 924 respectively drive the fourth blade 52 and the second blade 42 in the second slit 122 to synchronously reciprocate in opposite directions.

It should be noted that the connection method between the blade and the block in this example is: a groove is set in the middle of the block, and a protrusion that can be inserted into the groove is set on the corresponding blade. The block and the corresponding blade can be linked by the cooperation of the protrusion and the groove. The connection between the block and the blade or the blade assembly is adopted in this way below, which will not be repeated. In addition, in order to reduce the friction between the block and the cam surface, balls are installed at the two opposite ends of each block. In order to ensure the smooth movement of the first blade assembly 40 and the second blade assembly 50, a positioning groove is provided on the first blade assembly 40 and the second blade assembly 50, and a positioning pin that can be inserted into the positioning groove is provided on the roller brush body 11. The positioning pin can slide in the positioning groove and limit the radial displacement of the first blade assembly 40 and the second blade assembly 50 in the roller brush body.

From the above description, it can be known that when the roller brush 10 in this application is working, the external driving force generated by the rotation of the driving motor 30 is transmitted to the roller brush body 11 through the transmission box 20 and the second end cover 70, driving the roller brush body 11 to rotate relative to the first end cover 60. At the same time, the external driving force drives the first cam 912 and the second cam 922 to rotate relative to the roller brush body 11 after passing through the reduction device 80. During the rotation of the first cam 912, the first stopper 913 and the second stopper 914 are pushed by the cam surface of the first cam 912 to reciprocate synchronously in opposite directions, driving the first blade 41 and the fourth blade 52 to reciprocate synchronously in opposite directions. Since the first stopper 913 and the second stopper 914 are respectively located at the upper and lower parts of the first cam groove 911, their movement directions are opposite, and thus the movement directions of the first blade 41 and the fourth blade 52 are opposite. During the rotation of the second cam 922, the third stopper 923 and the fourth stopper 924 are pushed by the cam surface of the second cam 922 to synchronously reciprocate in opposite directions, driving the third blade 51 and the second blade 42 to synchronously reciprocate. Since the third stopper 923 and the fourth stopper 924 are respectively located at the upper part and the lower part of the second cam groove 921, the movement directions of the two are opposite, and the movement directions of the third blade 51 and the second blade 42 are opposite. At the same time, since the cam surface of the first cam 912 and the cam surface of the second cam 922 are opposite in direction, the movement directions of the first blade 41 and the third blade 51 are opposite, and the movement directions of the second blade 42 and the fourth blade 52 are opposite. That is to say, during the operation of the roller brush, not only the movement directions of the first blade assembly 40 and the second blade assembly 50 are opposite, but also the movement directions of the two blades included in the first blade assembly 40 and the second blade assembly 50 are opposite.

In another exemplary application, please refer to Figures 4, 5 and 7, the matching structure between the roller brush 10, the cleaning device 1 and the drive motor can be implemented in the same manner as the above-mentioned embodiment to achieve the conversion of the rotation of the drive motor 30 into the linear motion of the first blade assembly 40 and the second blade assembly 50. The description is not repeated in this embodiment. Different from the above-mentioned embodiment, the first blade assembly 40 and the second blade assembly 50 in this embodiment are both integral structures. Specifically, as shown in Figure 4, the first blade assembly 40 includes a first portion 40a located in one slit and a second portion 40b located in another slit. The second blade assembly 50 includes a first portion 50a located in one slit and a second portion 50b located in another slit.

In an exemplary application, as shown in Fig. 4 and Fig. 7, the driving assembly includes a first cam 912 with a first cam groove on its surface, and a first stopper 913 and a second stopper 914 disposed in the first cam groove and arranged opposite to each other. The first stopper 913 is connected to the first blade 41a of the first blade assembly 40a located in the first slit 121, driving the first blade assembly 40a to move in the first direction A, and the second stopper 914 is connected to the fourth blade 52a of the second blade assembly 50a located in the second slit 122, driving the second blade assembly 50a to move in the second direction B, which is the opposite direction of the first direction A. In this way, during the rotation of the first cam 912, the first blade assembly 40a and the second blade assembly 50a can be driven to synchronously reciprocate in opposite directions through the first blade 41a and the fourth blade 52a.

In another exemplary application, as shown in FIG8 , the driving assembly includes a cam assembly 901, a push rod 902, a first rack 903, a second rack 904, a gear 905, and a reset spring 906. The cam assembly 901 and the push rod 902 are located between the first end cover 60 and the gear 905 of the roller brush body 11. The cam assembly 901 includes a cylindrical cam connected to the output end of the reduction device 80, one end of the push rod 902 contacts the cam surface of the cylindrical cam, and the other end of the push rod 902 extends to the upper side of the gear 905 after radial expansion. The first rack 903 is formed at the other end of the push rod 902. In this way, the rotation of the drive motor 30 can be converted into the linear motion of the first rack 903 by the push rod 902 and the cam assembly 901. It can be understood that in other embodiments of the present application, the above method can be used instead of fixing the first rack 903 to the other end of the push rod 902 by other methods. The second rack 904 is disposed at the lower side of the gear 905, opposite to the first rack 903, and is not connected to the push rod 902. The first rack 903 and the second rack 904 are respectively meshed with two radially opposite ends of the gear 905, and are respectively connected to the first blade assembly 40 and the second blade assembly 50. The gear 905 is configured to receive an external driving force in a single direction (the direction of which is shown by arrow C in the figure), that is, the driving force provided by the drive motor 30. The reset spring 906 is located between the roller brush body 11 and the first rack 903 in the axial direction of the roller brush body 11, and is configured to provide a reset thrust for the first rack 903 and the second rack 904 when the driving force provided by the drive motor 30 is withdrawn, and enables the push rod 902 to always contact the cam surface of the cam assembly 901. It is understandable that, in this example, the gear 905 can also be configured to receive the bidirectional driving force input by the drive motor 30 to cancel the reset spring 906, that is, the drive motor 30 drives the gear 905 to move bidirectionally in the direction indicated by the arrow C and the direction opposite to the direction indicated by the arrow C to achieve reciprocating motion. Further, in an exemplary application, a guide mechanism can be provided to ensure the stability of the linear motion of the first rack 903 and the second rack 904. The guide mechanism may include a slide groove provided on the rack and a pin provided on the roller brush body 11 and capable of being inserted into the slide groove. The pin is used to limit the radial displacement of the rack in the roller brush body. It is understandable that the structure of the guide mechanism is not limited to this. In this embodiment, the connection between the rack and the blade assembly can be achieved by providing a circular socket on one of the rack and the blade assembly and providing a cylindrical pin on the other of the rack and the blade assembly. Of course, the connection method of the rack and the blade assembly is not limited to this. In the present application, the return spring 906 is fixed by respectively providing inwardly protruding radial positioning blocks at the distal end of the first rack 903 and the inner side of the roller brush body 11, and fixing the return spring 906 between the two radial positioning blocks. It can be understood that the fixing method of the return spring 906 is not limited to this.

Further, FIG. 8 also shows one embodiment of the deceleration device 80 in the present application. It can be understood that the embodiment of the deceleration device 80 and its matching structure with related elements can also be used in the roller brush of the first embodiment and the second embodiment. As shown in FIG. 8, the deceleration device 80 in this embodiment includes a three-row planetary gear mechanism, specifically including a sun gear 82, a planetary gear shaft 83, a planetary gear 84, a planetary carrier 85 and a ring gear 86. Among them, the ring gear 86 is connected to the roller brush body 11 and can rotate with the roller brush body 11. The outer end of the ring gear 86 is connected to the first end cover 60 through a bearing, supporting the roller brush body 11 and the internal elements thereof to rotate relative to the first end cover 60. The inner end of the ring gear 86 is connected to the input shaft of the cam assembly 901 through a bearing, so that the input shaft of the cam assembly 901 can rotate relative to the ring gear 86. The planetary gear 84 is located between the ring gear 86 and the sun gear 82, and meshes with the ring gear 86 and the sun gear 82. Each planetary carrier 85 is respectively connected to the planetary wheel shaft 83 of each planetary wheel 84 in the corresponding row, connecting the planetary wheels 84 in the corresponding row into a moving whole, and the output shaft of the outermost row of planetary carriers 85 is inserted into the middle row of sun wheels 82, serving as the input shaft of the middle row of sun wheels 82, and the output shaft of the middle row of planetary carriers 85 is inserted into the innermost row of sun wheels 82, serving as the input shaft of the innermost row of sun wheels 82. The output shaft of the innermost row of planetary carriers 85 is connected to the input shaft of the cam assembly 901, transmitting the movement of the reduction gear 80 to the cam assembly 901. After passing through this reduction gear 80, the rotation speed of the cam assembly 901 is less than the rotation speed of the roller brush body 11 and the ring gear 86.

In this example, when the cam assembly 901 rotates driven by the reduction device 80, the push rod 902 can move to the left under the push of the cam surface, driving the first rack 903 to drive the gear 905 to rotate counterclockwise, and when the gear 905 rotates, it drives the second rack 904 on its lower side to move to the right. When the push rod 902 moves to the extreme position on its left side, the first gear 905 moves to the right under the push of the return spring 906, driving the gear 905 to rotate clockwise. When the gear 905 rotates, it drives the second rack 904 on its lower side to move to the left. When the push rod 902 moves to the extreme position on its right side, it can continue to move to the left under the push of the cam surface, and then move to the right, ..., and so on and so forth, the reciprocating reverse motion of the first blade assembly 40 and the second blade assembly 50 can be realized.

Based on the description of the above feasible implementation modes, it can be understood that in the embodiment of the present application, based on the configuration of the above-mentioned drive assembly, the first blade assembly and the second blade move toward each other in a straight line, which can reduce the cam pressure angle, reduce the cam rotation speed, and reduce the cam wear rate, thereby increasing the service life of the roller brush in the cleaning device.

In one embodiment of the present application, in order to reduce the wear of the blade assembly on the roller brush body 11, an anti-wear strip is provided in the slit, and the anti-wear strip is located between the roller brush body and the first blade assembly and/or the second blade assembly.

In any of the above embodiments of the present application, an anti-wear strip 14 may be provided in the slit of the roller brush 10 , and the anti-wear strip 14 is located between the roller brush body 11 and the first blade assembly 40 and/or the second blade assembly 50 .

Please refer to FIG. 2 , a blade gap adjustment mechanism is provided in the roller brush body 11, and the blade gap adjustment mechanism is configured to adjust the fit between the first blade assembly 40 and the second blade assembly 50 based on elastic deformation. Specifically, please refer to FIG. 5 , the blade gap adjustment mechanism includes an elastic member 15 and a mounting groove 16 matching the elastic member 15, one end of the elastic member 15 is installed in the mounting groove 16, and the other end of the elastic member 15 abuts against the anti-wear strip 14. The elastic member 15 can be a sponge, rubber, spring, etc., which is provided between the anti-wear strip 14 and the roller brush body 11, and one end of it is accommodated in the mounting groove 16, and the other end of it protrudes out of the mounting groove 16 and abuts against the anti-wear strip 14, so as to limit the first blade assembly 40 and/or the second blade assembly 50 in a direction perpendicular to the first blade assembly 40 and/or the second blade assembly 50 or provide extrusion stress to adjust the blade fit. The anti-wear strip 14 includes a long anti-wear strip body 141 parallel to each other and a plurality of arc-shaped connecting parts 142 arranged along the length direction of the anti-wear strip body 141. The arc-shaped connecting parts 142 are connected to the anti-wear strip body 141 as a whole, so that the anti-wear strip 14 forms an integral structure. This structural setting can ensure that the anti-wear strip 14 will not be bounced off by the elastic part 15 during the installation process.

In the above embodiment, the tooth spacing of the cutting teeth on the first blade assembly 40 is the same as the tooth spacing of the cutting teeth on the second blade assembly 50, which is T0, so that during the movement of the first blade assembly 40 and the second blade assembly 50, all the cutting teeth cut the hair at the same time. In order to avoid the situation where the cutting resistance is too large when there are a lot of hairs entangled on the roller brush body, resulting in damage to the roller brush or the driving motor of the roller brush.

The embodiment of the present application also provides a roller brush, in which the cutting teeth of the first blade assembly 40 and the second blade assembly 50 are not staggered at the same time, so as to reduce the resistance in the hair cutting process. Referring to FIG. 9 , the first blade assembly 40 and the second blade assembly 50 both include a plurality of uniformly arranged cutting teeth, the tooth spacing between adjacent cutting teeth on the first blade assembly 40 is T1, and the tooth spacing between adjacent cutting teeth on the second blade assembly is T2, and T1>T2. In an exemplary application, in order to allow the cutting teeth of the first blade assembly 40 and the cutting teeth of the second blade assembly 50 to stagger at least in part of the time during the process of the first blade assembly 40 or the second blade assembly 50 reciprocating in opposite directions at the opening on the roller brush body 11, the movement stroke L of the first blade assembly 40 or the second blade assembly 50 relative to the roller brush body is configured such that L is greater than or equal to 0.5T1. In another preferred exemplary application, in order to increase the coverage length of the blade assembly on the roller brush body 11 along the axial direction, the movement stroke L of the first blade assembly 40 and the second blade assembly 50 relative to the roller brush body is respectively configured as L greater than or equal to 0.5T1, and L less than or equal to T2.

It is understandable that if L is less than 0.5T1, the first blade assembly 40 and the second blade assembly 50 cannot interlace during the movement, and an effective cutting action cannot be formed, and the hair cannot be cut. If the L movement stroke is too long, the first blade assembly 40 and the second blade assembly 50 will interlace multiple times during the movement, and the hair can be cut multiple times. The greater the relative displacement of the first blade assembly 40 and the second blade assembly 50 on the roller brush body 11, the more displacement space needs to be reserved; therefore, by setting L less than or equal to T2, the coverage length of the blade assembly on the roller brush body can be maximized, so that the hair wrapped on the roller brush can be cut within the maximum range.

In particular, in one application, the roller brush 10 further includes an independent power source disposed inside the roller brush shaft, and the power source can be disposed at the front end of the deceleration device 80 in the aforementioned embodiment to provide power for the blade assembly to move linearly. The provision of the independent power source makes the cleaning device more flexible in controlling the roller brush 10, for example, the blade assembly can be independently controlled to cut the hair entangled on the roller brush without the roller brush rotating.

Based on the above roller brush embodiment, the embodiment of the present application further provides a roller brush 10. At least one side edge of the slit on the roller brush is provided with protective teeth, and the protective teeth are arranged at intervals along the axial direction of the roller brush body. In one embodiment, the roller brush is provided with the protective teeth only on one side edge of the slit.

The protective teeth 13 distributed on one edge of the slit shield the cutting teeth extending out of the opening on one side of the blade assembly. On the one hand, it can prevent the cutting teeth on the roller brush from directly contacting the object to be cleaned, the user's limbs or pets, thereby ensuring that the cutting teeth only cut the entangled hair and there will be no safety hazards; on the other hand, it can also increase the speed at which the hair entangled on the surface of the roller brush is gathered. Specifically, the protective teeth on one side of the slit create a height difference between the two sides of the opening formed on the outer surface of the roller brush body, so that the hair entangled on the roller brush can be inserted into the tooth groove formed by the adjacent protective teeth with greater freedom, and gather in the tooth groove more quickly, which helps to improve the shearing efficiency of the blade assembly on the hair. Preferably, during the rotation of the roller brush body, the protective teeth are provided on the edge of the slit that first contacts the object to be cleaned.

In an exemplary application, as shown in Figures 10-12, the roller brush 10 includes a roller brush body, which is cylindrical, and a bristle bundle 110 is provided on the roller brush body. A first slit 121 and a second slit 122 are formed on the roller brush body, and the two slits form openings along the axial direction on the outer surface of the roller brush body. The first blade assembly 40 and the second blade assembly 50 are stacked in the first slit 121 and the second slit 122, and extend through the opening on the outer surface of the roller brush body to protrude from the outer surface of the roller brush body. The first blade assembly 40 and the second blade assembly 50 are configured to reciprocate in opposite directions at the opening; during the movement of the first blade assembly 40 and the second blade assembly 50, the cutting teeth of the first blade assembly 40 and the cutting teeth of the second blade assembly 50 are staggered at least in part of the time period to cut off the hair entangled on the surface of the roller brush body 11. In order to achieve the reciprocating motion of the first blade assembly 40 and the second blade assembly 50 in opposite directions at the opening of the roller brush body, so that the cutting teeth of the first blade assembly 40 and the cutting teeth of the second blade assembly 50 are staggered at least in part of the time period to shear the hair entangled on the surface of the roller brush body, the specific implementation structure of the first blade assembly 40 and the second blade assembly 50 shearing the hair in the opening formed by the slit in this example can adopt the same configuration as the aforementioned embodiment, which will not be repeated here. In particular, compared with the configuration in which a row of protective teeth 13 are provided on each side of the opening of the slit 12 in FIG. 1, the roller brush 10 in this example is only provided with protective teeth on one edge of the slit, so that a height difference Δh is formed on both sides of the opening formed by the slit (see FIG. 11), so that the hair entangled on the roller brush can be inserted into the tooth groove formed by the adjacent protective teeth with greater freedom, and converge in the tooth groove more quickly, which helps to improve the shearing efficiency of the blade assembly on the hair. Specifically, in this embodiment, the roller brush body includes a first barrel 111 and a second barrel 112, and the first barrel 111 and the second barrel 112 are assembled to form a first slit 121 and a second slit 122. In other embodiments, the first slit 121 and the second slit 122 may be formed in other ways, for example, by providing two small modules with slits and assembling them on the roller brush body.

Further, please refer to FIG. 11, the first blade assembly 40 includes a first portion 40a located in the first slit 121 and a second portion 40b located in the second slit 122. The second blade assembly 50 includes a first portion 50a located in the first slit 121 and a second portion 50b located in the second slit 122. At the first slit 121, the protective teeth are arranged on the first cylinder 111 on a side close to the first portion 40a of the first blade assembly 40, and at the first slit 121, the protective teeth are arranged on the second cylinder 112 on a side close to the second portion 50b of the second blade assembly 50. That is, the edge of the slit that first contacts the object to be cleaned is provided with protective teeth, and this configuration is conducive to increasing the partition space between the cutting teeth of the roller brush and the object to be cleaned, thereby further reducing the risk of damaging the object to be cleaned. It should be noted that the dotted line of the roller brush cavity portion in FIG. 11 represents a key structure that is not required to be explained in this example, and the specific structure is not shown in the figure. The structure in this area can refer to the corresponding structure in the aforementioned embodiment. As shown in Figure 10, the roller brush rotates around the central axis O in the direction indicated by the arrow f. Combined with Figure 11, at the opening formed by the first slit 121, the protective teeth 13 located on the first cylinder 111 close to the first part 40a of the first blade assembly 40 are higher than the height of the first part 40a of the first blade assembly 40 protruding from the outer surface of the roller brush body. During the rotation of the roller brush, the protective teeth 13 constitute a partition structure between the first part 40a of the first blade assembly 40 and the cleaning object, which can prevent the first part 40a of the first blade assembly 40 from damaging the cleaned object during the staggered cutting of hair. Combined with the cross-sectional view of Figure 11, it can be understood that the invisible part of the roller body in Figure 10, at the opening formed by the first slit 122, the protective teeth 13 located on the second cylinder 112 close to the second part 50b of the second blade assembly 50 is higher than the height of the second part 50b of the second blade assembly 50 protruding from the outer surface of the roller brush body. During the rotation of the roller brush, the protective teeth 13 constitute a partition structure between the second part 50b of the second blade assembly and the object to be cleaned, which can prevent the second part 50b of the second blade assembly 50 from causing damage to the object to be cleaned during the staggered cutting of hair.

In addition, the height of the protective teeth 13 extending in the radial direction of the roller brush body can be configured to be no less than the height of the first blade assembly 40 and the second blade assembly 50 extending out of the opening, and the height of the bristle bundle 110 protruding from the outer surface of the roller brush body is greater than the height of the protective teeth 13 protruding from the outer surface of the roller brush body. In this way, during the rotation of the roller brush, the bristle bundle and the protective teeth can withstand the stress caused by contact at different heights between the cutting teeth and the object to be cleaned, so as to avoid direct contact between the cutting teeth on the roller brush and the object to be cleaned, the user's limbs or pets, thereby ensuring that the cutting teeth only cut the entangled hair and there will be no safety hazards.

In the embodiment of the present application, the object to be cleaned can be a floor, a carpet, or the like, which can be cleaned by rotating the roller brush. The roller brush body is not limited to a cylindrical structure in which two parts of the cylinder are spliced together. The two parts constituting the blade assembly can be an integral structure or can be independent of each other. In some embodiments, the roller can be a cylindrical structure in which more pieces of cylinders are spliced together. In other embodiments, the roller brush body is an integral cylindrical structure. In other embodiments, the first blade assembly 40 and the second blade assembly 50 can also be split blades, that is, the first part 40a and the second part 40b of the first blade assembly 40 are independent of each other and are respectively arranged in the first slit and the second slit; the first part 50a and the second part 50b of the second blade assembly 50 are independent of each other and are respectively arranged in the first slit and the second slit. In a preferred embodiment, the first part 40a and the second part 40b of the first blade assembly 40 are connected as a whole, and the first part 50a and the second part 50b of the second blade assembly 50 are connected as a whole. Compared with the split blade structure, the integral blade assembly has fewer driving components, a simplified driving structure, and is easy to assemble.

On the basis of the above-mentioned embodiments, the roller brush of the embodiment of the present application can further optimize the protection and hair shearing effect by adjusting the height difference between the bristles and the cutting teeth, the spacing between the protective teeth and the blade assembly, and the arrangement of the protective teeth and the cutting teeth. In one embodiment of the present application, the height of the cutting teeth protruding from the outer surface of the roller brush body is lower than the height of the protective teeth protruding from the outer surface of the roller brush body, and a height difference h1 between 0.5 mm and 2 mm is formed. The height difference h1 can refer to the marking in Figure 11. This can not only meet the safety requirements of the cutting teeth in the vertical direction, but also better take into account the hair cutting function of the roller brush and the limited installation space requirements on the cleaning device.

In another embodiment of the present application, the side of the guard teeth facing the cutting teeth forms a flat cross section, and the spacing g1 between the cutting teeth and the cross section is between 0.05 mm and 0.15 mm. The spacing g1 can refer to the marking in Figure 11. It was found in the test that the cut hair is not easy to enter the gap between the two, that is, it is not easy for hair to remain between the two, and the cutting is smoother. In addition, it also helps to maintain the balance between the blade assembly and the elastic member 15, so as to achieve stable cutting of the blade assembly in the slit.

The roller brush provided in the embodiments of the present application can be used in cleaning equipment. The cleaning equipment contacts the object to be cleaned by rolling. During the rotation of the roller brush, the roller brush contacts the object to be cleaned to absorb or raise foreign matter such as dust. The cleaning equipment is not limited to self-propelled cleaning robots, but can also be cleaning equipment such as handheld scrubbers/sweepers. The following embodiments focus on a roller brush having protective teeth on its outer surface. The protective teeth protruding from the outer surface of the roller brush body distinguish it from the embodiment shown in FIG. 1 above, and the blade assembly is only protected from one side. Specifically, the roller brush includes: a roller brush body 10, the roller brush body 10, a blade assembly and protective teeth, wherein a slit is provided on the roller brush body 10, the slit extends along the axial direction of the roller brush body, and in the axial direction of the roller brush body, the slit has two sides extending along the axial direction of the roller brush body; the protective teeth are only arranged on one side of the slit and are arranged at intervals along the axial direction of the roller brush body; the slit is matched on the outer surface of the roller brush body 11 to form an opening; the blade assembly is provided with cutting teeth for cutting hair wrapped around the roller brush, the blade assembly is arranged in the slit, the cutting teeth extend out of the opening and protrude from the outer surface of the roller brush body; the protective teeth on the roller brush body protrude from the outer surface of the roller brush body to protect the blade assembly.

Unlike the aforementioned one-piece barrel structure which requires a slit to be set on the roller brush body, the slit for accommodating the blade assembly is formed by directly using the joint of the first barrel 111 and the second barrel 112, thereby avoiding a complicated production process. In addition, the first barrel 111 and the second barrel 112 can be opened, making it easier to assemble the blade assembly on the roller brush.

Exemplarily, the first blade assembly and the second blade assembly each include a plurality of uniformly arranged cutting teeth, the tooth spacing between adjacent cutting teeth on the first blade assembly is T1, the tooth spacing between adjacent cutting teeth on the second blade assembly is T2, and T1>T2, and the first blade assembly and the second blade assembly respectively meet the motion stroke L relative to the roller brush body, T2≥L≥0.5T1. In other embodiments, it can also be set that the first blade assembly and the second blade assembly each include a plurality of uniformly arranged cutting teeth, the tooth spacing between adjacent cutting teeth on the first blade assembly is T1, the tooth spacing between adjacent cutting teeth on the second blade assembly is T2, and T1>T2, and the motion stroke L of the first blade assembly or the second blade assembly relative to the roller brush body meets L≥0.5T1. This configuration allows the cutting teeth to be staggered and cut during the movement of the first blade assembly 40 and the second blade assembly 50, that is, only some of the cutting teeth cut hair in the same period, rather than all the cutting teeth cutting at the same time. This can avoid the situation where there is too much cutting resistance when there are a lot of hairs wrapped around the roller brush body, resulting in damage to the roller brush or the driving motor of the roller brush. The specific description of this part can refer to the aforementioned embodiment and will not be elaborated here.

In some embodiments, the first blade assembly 40 and the second blade assembly 40 can be configured to synchronously reciprocate in opposite directions in a synchronous or asynchronous manner. When the first blade assembly and the second blade assembly of the blade assembly synchronously reciprocate in opposite directions in a synchronous manner, the design difficulty of the blade assembly drive device can be reduced.

Furthermore, in order to reduce the wear of the blade assembly on the roller brush body 11, in any of the above-mentioned embodiments of the present application, an anti-wear strip 14 can be provided in the slit of the roller brush 10, and the anti-wear strip 14 is located between the roller brush body 11 and the first blade assembly 40 and/or the second blade assembly 50.

In a preferred embodiment, as shown in FIG2 , a blade gap adjustment mechanism is provided in the roller brush body 11, and the blade gap adjustment mechanism is configured to adjust the fit between the first blade assembly 40 and the second blade assembly 50 based on elastic deformation. Specifically, referring to FIG5 , the blade gap adjustment mechanism includes an elastic member 15 and a mounting groove 16 matching the elastic member 15, one end of the elastic member 15 is installed in the mounting groove 16, and the other end of the elastic member 15 abuts against the anti-wear strip 14. The elastic member 15 can be a sponge, rubber, spring, etc., which is provided between the anti-wear strip 14 and the roller brush body 11, and one end of the elastic member 15 is accommodated in the mounting groove 16, and the other end of the elastic member 15 protrudes out of the mounting groove 16 and abuts against the anti-wear strip 14, so as to limit the first blade assembly 40 and/or the second blade assembly 50 or provide extrusion stress in a direction perpendicular to the first blade assembly 40 and/or the second blade assembly 50, and adjust the blade fit. The anti-wear strip 14 includes a long anti-wear strip body 141 parallel to each other and a plurality of arc-shaped connecting parts 142 arranged along the length direction of the anti-wear strip body 141. The arc-shaped connecting parts 142 are connected to the anti-wear strip body 141 as a whole, so that the anti-wear strip 14 forms an integral structure. This structural setting can ensure that the anti-wear strip 14 will not be bounced off by the elastic part 15 during the installation process.

In the embodiment of the present application, the arrangement of the protective teeth on the roller brush body and the arrangement of the cutting teeth on the tool assembly are not limited to a uniform arrangement. Those skilled in the art can adjust the tooth spacing, tooth shape and tooth density as needed to obtain the best performance that can meet the needs of a specific product.

It should be noted that the adjustment of the arrangement of the guard teeth and the cutting teeth is not limited to the adjustment of the tooth shape, tooth spacing or tooth density of the guard teeth or the cutting teeth, but may also include the adjustment of the overlap between the guard teeth and the cutting teeth in the axial direction. For example, in one possible application, the guard teeth and the cutting teeth may not completely overlap in the axial direction of the roller brush, so that the cutting teeth of the blade assembly and the guard teeth on the roller body are staggered in the axial direction. In other applications, the tooth density of the guard teeth can be adjusted to be the same as or different from the tooth density of the blade teeth on the blade teeth. In this way, at least part of the cutting teeth corresponds to the tooth grooves of the guard teeth, and in the process of the hair converging to the tooth grooves formed by two adjacent guard teeth, they contact the cutting teeth. Before the reciprocating cutting action of the blade assembly, part of the hair is cut off by the stress of the hair wrapped around the surface of the roller brush body.

The embodiment of the present application further provides a cleaning device, which includes any feasible roller brush 10 described in the above embodiments, and a driving member for providing driving force to the roller brush so that the roller brush rotates to perform cleaning work.

In one embodiment, the roller brush is installed on the cleaning device, and the cleaning device also includes a driving device for the roller brush, and the driving device includes a driving motor and a transmission box. The driving motor on the cleaning device is connected to the roller brush through the transmission box. The cleaning device of this embodiment can provide power to the roller brush under the drive of the driving motor and the transmission box. Due to the setting of the above-mentioned roller brush, during the cleaning process of the cleaning device, the driving motor of the roller brush drives the roller brush to rotate, and at the same time, the driving force of the driving motor is used to drive the roller brush to perform hair cutting.

The cleaning device of the embodiment of the present application at least has the beneficial effect of the roller brush in hair cutting in the above embodiment, which will not be described in detail in this embodiment. For the specific details of the roller brush included therein, please refer to the above content of this embodiment, which will not be described in detail here. Furthermore, in this embodiment, the effect of hair cutting on the roller brush can be further optimized by controlling the movement timing, reciprocating frequency and distance of the roller brush blade during movement.

In the aforementioned patent specification, the embodiments of the present application have been described with reference to specific exemplary embodiments of the present application. It is obvious that, without departing from the broader spirit and scope of the present application as set forth in the attached claims, the structures in its different embodiments can be modified in a variety of different combinations to obtain new embodiments. Therefore, this patent specification and the drawings should be considered illustrative rather than restrictive. Any technician familiar with the technical field within the technical scope disclosed in this application can easily think of changes or substitutions, which should be covered within the scope of protection of this application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

A roller brush used in cleaning equipment, characterized by comprising:

A roller brush body, wherein a slit is provided on the roller brush body, and the slit extends along the axis direction of the roller brush body; an opening is formed on the outer surface of the roller brush body to match the slit;

a blade assembly, provided with cutting teeth for cutting hair wound around the roller brush, the blade assembly being arranged in the slit, the cutting teeth extending out of the opening and protruding out of the outer surface of the roller brush body;

Protective teeth protrude from the outer surface of the roller brush body to protect the blade assembly;

The slit has two sides extending along the axial direction of the roller brush body; the protective teeth are only arranged on one side of the slit and are spaced apart along the axial direction of the roller brush body.
The roller brush according to claim 1 is characterized in that the two sides of the slit include an early contact side and a late contact side, and the cutting teeth are located between the early contact side and the late contact side; the early contact side refers to a side that contacts the cleaned object earlier than the cutting teeth during the rotation of the roller brush to perform cleaning work; the late contact side refers to a side that contacts the cleaned object later than the cutting teeth during the rotation of the roller brush to perform cleaning work; the protective teeth are only arranged on the early contact side.
The roller brush according to claim 2 is characterized in that, in the radial direction of the roller brush cross section, the protective teeth protrude more from the outer surface of the roller brush body than the cutting teeth.
The roller brush according to claim 3 is characterized in that, in the radial direction of the roller brush cross section, the height difference of the protective teeth protruding from the cutting teeth ranges from 0.5 mm to 2 mm.
The roller brush according to claim 2 or 3 is characterized in that the protective tooth includes an inner side surface facing the cutting tooth and extending along the axial direction of the roller brush body, and the spacing between the cutting tooth and the inner side surface ranges from 0.05 mm to 0.15 mm.
The roller brush according to claim 2 is characterized in that the roller brush comprises two slits in which the blade assembly is disposed, and the two slits are each provided with the guard teeth only on the early contact side.
The roller brush according to claim 2 is characterized in that the blade assembly is configured to move under the drive of a driving force to cut off the hair entangled on the surface of the roller brush body.
The roller brush according to claim 7 is characterized in that it comprises two groups of blade assemblies, and the two groups of blade assemblies are stacked in the slit.
The roller brush as described in claim 8 is characterized in that the two sets of blade assemblies include a first blade assembly and a second blade assembly, and the first blade assembly and the second blade assembly are configured to reciprocate in opposite directions at the opening; during the movement of the first blade assembly and the second blade assembly, the cutting teeth of the first blade assembly are staggered with the cutting teeth of the second blade assembly during at least a portion of the time period to cut off the hair entangled on the surface of the roller brush body.
The roller brush as described in claim 9 is characterized in that a first slit and a second slit relative to each other are provided on the roller brush body, the first blade assembly includes a first blade and a second blade, the second blade assembly includes a third blade and a fourth blade, the first blade and the third blade are stacked in the first slit, and the second blade and the fourth blade are stacked in the second slit.
The roller brush according to claim 9 is characterized in that the first blade and the second blade are connected as a whole, and the third blade and the fourth blade assembly are connected as a whole; or, the first blade, the second blade, the third blade and the fourth blade are independent of each other.
The roller brush as described in claim 9 is characterized in that the first blade assembly and the second blade assembly each include a plurality of evenly arranged cutting teeth, the tooth spacing between adjacent cutting teeth on the first blade assembly is T1, the tooth spacing between adjacent cutting teeth on the second blade assembly is T2, and T1>T2, and the movement stroke L of the first blade assembly and the second blade assembly respectively relative to the roller brush body satisfies, T2≥L≥0.5T1.
The roller brush as described in claim 9 is characterized in that the first blade assembly and the second blade assembly each include a plurality of evenly arranged cutting teeth, the tooth spacing between adjacent cutting teeth on the first blade assembly is T1, the tooth spacing between adjacent cutting teeth on the second blade assembly is T2, and T1>T2, and the movement stroke L of the first blade assembly or the second blade assembly relative to the roller brush body satisfies, L≥0.5T1.
The roller brush according to any one of claims 1 to 13, characterized in that an anti-wear strip is provided in the slit, and the anti-wear strip is located between the roller brush body and the first blade assembly and/or the second blade assembly.
The roller brush as described in claim 14 is characterized in that a blade gap adjustment mechanism is provided in the roller brush body, and the blade gap adjustment mechanism is configured to adjust the fit between the first blade assembly and the second blade assembly based on elastic deformation.
The roller brush as described in claim 15 is characterized in that the blade gap adjustment mechanism includes an elastic member and a mounting groove matching the elastic member, one end of the elastic member is installed in the mounting groove, and the other end of the elastic member abuts against the anti-wear strip.
The roller brush according to claim 7 is characterized in that it also includes a transmission mechanism connected to the blade assembly, the transmission mechanism is arranged in the inner cavity of the roller brush body, and the transmission mechanism includes a cam lug transmission structure or a gear rack transmission structure.
A cleaning device, characterized in that the cleaning device comprises a roller brush as described in any one of claims 1 to 17, and a driving member for providing driving force to the roller brush so that the roller brush rotates to perform cleaning work.