Patent Description:
Almost all ground cleaning apparatuses for wet and dry dual use on the current market perform wet mopping first and then perform dry suction, that is, the ground cleaning apparatuses have rear dust collection functions. However, this may sometimes cause troubles: in a case of large particle hard dirt, the large particle dirt obstructs wet mopping or large particulate matters brought into a wet mopping device are easily stuck in the wet mopping device, such that the apparatuses cannot work and are even damaged.

In addition, there are scarcely cleaning apparatuses which can achieve cleaning effects of "dryness", "cleanliness" and "self-cleanliness" on the current market. The "dryness" means that there are few water stains left on a rolling brush treated by a pressure roller. The "cleanliness" means that the dirt on the ground can be conveyed through a threaded conveying rod and treated thoroughly, and sweeping and mopping are integrated. The "self-cleanliness" means that the rolling brush can achieve a self-cleaning process by way of clean water transportation and pressure roller squeezing.

Furthermore, after commonly scraped by a scraping strip, the surface of the rolling brush is pressed together, such that the ability of the rolling brush to adsorb dirty water and dirt is extremely reduced. The pressure roller and the rolling brush rotate at a relatively high speed and generate a lot of accumulated water which is easy to splash, such that extra water stains are easily generated. <CIT> discloses a ground cleaning apparatus comprising a brush, a washing assembly, a water storage device and a dust collection device as well as dirty water collection and transporting means.

Therefore, in combination with the above technical problems, it is necessary to provide a new technical solution.

To solve the technical problems in the related art, this utility model provides a cleaning apparatus which performs dry suction first and then performs wet mopping, is flexible in configuration, simple in structure and convenient to use, and achieves functions of "dryness", "cleanliness" and "self-cleanliness". A specific technical solution is as follows:.

Further, the dust collection device is further provided with a dust collection cover, the dust collection cover is provided with a dust suction channel and an access port, and the dust suction port is connected to the access port through the dust suction channel; and
the dust suction port is configured to be foldable, retractable or detachable.

Further, the dust collection device further includes dust suction rod, where.

Further, the cleaning device further includes at least one pressure roller and at least one first hairbrush assembly, where.

Further, the conveying rod housing is provided with multiple first protrusions at an upper edge position of the opening, the multiple first protrusions are the first hairbrush assemblies, and the first protrusions face the rolling brush and are in contact with the rolling brush; and/or.

Further, the cleaning device includes at least one second hairbrush assembly, where.

Further, the water storage device further includes a clean water tank, where the clean water tank is arranged on a side, away from the rolling brush, of the washing assembly, and the clean water tank is connected to a water inlet through a clean water pipe.

Further, the water storage device further includes a water pump, where the water pump is arranged between the clean water tank and the cleaning device, and the water pump is configured to pump clean water in the clean water tank into the cleaning device.

Further, at least one water supplementing port is formed in an inner wall of the water retaining housing, the water supplementing port faces the rolling brush, and the water supplementing port is connected to the clean water tank through the clean water pipe; and/or.

Further, the ground cleaning apparatus having a front dust collection function further includes a hairbrush housing, where the hairbrush housing is accommodated in the water retaining housing, the hairbrush is rotatably mounted in the hairbrush housing, the second protrusions on the hairbrush are spirally arranged on the hairbrush, the hairbrush housing has a water inlet, a water supplementing port of the hairbrush housing and a drain opening, the water inlet is formed at one end of the hairbrush housing, the water supplementing port of the hairbrush housing faces the rolling brush, and the water inlet is connected to the clean water tank through the clean water pipe.

Further, a hollowed structure is arranged at a position, close to the opening at a top of the conveying rod housing; and/or.

Further, the ground cleaning apparatus having a front dust collection function further includes a driving device, where the driving device is configured to drive the rolling brush to rotate; and
multiple tufts are arranged on the threaded conveying rod.

Further, the ground cleaning apparatus having a front dust collection function further includes an electricity storage assembly, and the electricity storage assembly is electrically connected to the driving device.

Further, the threaded conveying rod is a shaftless threaded conveying rod; and
an inclined plate extends outwards from a lower edge of the opening, and the inclined plate extends towards a bottom of the rolling brush.

Compared with the related art, the technical solution of the ground cleaning apparatus having a front dust collection function in the patent at least has the following one or more beneficial effects:
The dust suction port of the apparatus is formed in front of the cleaning device which performs dry suction first and then performs wet mopping. The cleaning device sucks particle dirt on the ground first and then only needs to clean dirty water and a small amount of dirt, such that the damage to the cleaning device caused by large particle dirt is reduced, and the service life of the cleaning device is prolonged. The cleaning device performs dry suction and wet mopping separately, such that the cleaning effect is better.

In the apparatus, an access port of a dust collection cover can be flexibly adapted to the dust collection device. The dust suction rod in the patent can be adapted and a common vacuum cleaner on the current market can be adapted as well. Old stuffs of users can be reused, and the apparatus is high in universality.

The patent can achieve "dryness", "cleanliness" and "self-cleanliness". The "dryness" means that there are few water stains left on a rolling brush treated by a pressure roller. The "cleanliness" means that the dirt on the ground can be conveyed through a threaded conveying rod and treated thoroughly, and sweeping and mopping are integrated. The "self-cleanliness" means that the rolling brush can achieve a self-cleaning process by way of clean water supplementation by the rolling brush and pressure roller squeezing in the patent. The patent provides various water supplementation modes, which helps to achieve self-cleanliness. The patent further accords with an ergonomic design, improves the user experience greatly, and overcomes defects of an existing product.

The first hairbrush assemblies are additionally arranged. Protrusions such as the first protrusions or second protrusions on the first hairbrush assemblies and the rolling brush form point-to-face contacts. Compared with a face-to-face contact formed by a water scraping strip or the pressure rod and the rolling brush, flexible dirt such as hairs and noodles adhered to the rolling brush cannot be removed by way of an acting force of the face-to-face contact formed by the water scraping strip or the pressure rod, and the flexible dirt is even squeezed and attached to the rolling brush more firmly. For the first hairbrush assemblies forming point-to-face contacts, the protrusions or second protrusions thereon are configured to hook off the flexible dirt adhered to the rolling brush, such that the first hairbrush assemblies are configured to remove dirt on the rolling brush more effectively and thoroughly, thereby effectively improving the removal effect of the dirt on the rolling brush. The surface of the rolling brush is clean continuously, which helps to improve the ground cleaning effect. Of course, the first hairbrush assemblies cannot only remove the flexible dirt, but also remove the particle dirt more easily.

The hairbrush is additionally arranged to prevent water accumulation which will be formed below the pressure roller because the pressure roller and the rolling brush squeeze and rotate relatively at a high speed, which plays a guiding role. Moreover, the rolling brush rotates to drive the hairbrush to rotate to throw the dirty water or dirt squeezed by the pressure roller into the conveying rod housing, such that the dirt on the surface of the rolling brush can be eliminated.

After the rolling brush is squeezed by the pressure rod or the water scraping strip to scrape the dirty water and dirt, the lint water absorption layer on the surface of the rolling brush presses a rolling shaft. When the pressed lint water absorption layer rotates forwards continuously to be in contact with the ground again, as the lint water absorption layer is pressed together, the ability of the rolling brush to adsorb the dirty water and dirt will be deteriorated obviously. Therefore, after the rolling brush is squeezed by the pressure rod, the second hairbrush assembly in contact with the rolling brush is arranged on the surface of the rolling brush, the wool tops on the second hairbrush assembly scrape the lint water absorption layer, such that the pressed lint water absorption layer becomes fluffy. The fluffy lint water absorption layer is configured to adsorb the dirty water and dirt on the ground well. Therefore, the first hairbrush assemblies and the second hairbrush assembly both help the rolling brush improve the cleaning ability greatly.

There are various optional solutions for the water supplementation modes of self-cleanliness of the rolling brush, which are flexible and diverse. The water supplementation modes include one of or more of water supplementation from the water retaining housing, water supplementation from the conveying rod housing, water supplementation from the hairbrush, water supplementation from the hairbrush housing and water supplementation from the pressure roller arbitrarily, and a free combination thereof, such that the accessories of the apparatus are flexibly configured.

The threaded conveying rod is arranged. The threaded conveying rod and the rolling brush rotate relatively to squeeze each other, such that the resistance of the rolling brush is reduced, and the driving power of the rolling brush can be saved. Moreover, rotary squeezing does not damage the surfaces of the rolling brush and the threaded conveying rod, such that the service life of the product is prolonged. The threaded conveying rod conveys the dirty water and dirt squeezed by the rolling brush to the dirt outlet at the other end from one end of the threaded conveying rod along the threaded groove, which facilitates self-cleanliness of the rolling brush. The dirt outlet and the water inlet can be preferably formed at both ends of the threaded conveying rod to save the space, which facilitates a miniaturized or diverse design of the product. The surface of the threaded conveying rod is protruding and recessed, and when the threaded conveying rod presses the rolling brush and rotates, the protruding and recessed surface of the threaded conveying rod kneads, pats, and squeezes the rolling brush, such that the cleaning and drying effects of the surface of the rolling brush are better. The threaded conveying rod squeezes the rolling brush to squeeze the dirty water and dirt on the rolling brush, such that the rolling brush is in a semi-wet, micro-wet or micro-dry state. The cleaning and decontaminating abilities of the drier rolling brush are further facilitated.

The pressure roller is arranged to squeeze the rolling brush to remove the dirty water. The pressure roller squeezes the rolling brush and rotates reverse to the rolling brush to form rotary squeezing of two cylinders. The driving power of the rolling brush is less in loss, such that the requirement on the driving power of the rolling brush is reduced. The rotary squeeze is not prone to damage the surfaces of the rolling brush and the pressure roller, such that the service life of the product is prolonged favorably. The pressure roller further squeezes the rolling brush, such that the rolling brush is squeezed to a micro-wet, micro-dry and even semi-dry state and can block large particle dirt, and therefore, the work efficiency and the cleaning effect of the rolling brush are improved more effectively. The degree of tightness of the pressure roller and the rolling brush can be adjusted according to an actual using condition, such that the optimum cleaning effect is achieved.

The ground cleaning apparatus having a front dust collection function in the patent features simple and compact structure. The product structure is simplified and the cost is lowered favorably. The weight and volume of the apparatus is reduced. It is more convenient for a user to take and use the ground cleaning apparatus having a front dust collection function.

The additional aspects and advantages of this utility model will be provided in the following description, some of which will become apparent from the following description or may be learned from practices of this utility model.

To more clearly illustrate the technical solutions of this utility model, the drawings required in the embodiments will be briefly introduced below. It is apparent that the drawings in the following description are only some embodiments of this utility model, and for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without making creative efforts.

In the figures, <NUM>-cleaning device, <NUM>-rolling brush, <NUM>-washing assembly, <NUM>-water retaining housing, <NUM>-pressure roller, <NUM>-driving device, <NUM>-dust collection cover, <NUM>-dust suction rod, <NUM>-lint water absorption layer, <NUM>-rolling shaft, <NUM>-threaded conveying rod, <NUM>-conveying rod housing, <NUM>-threaded groove, <NUM>-thread protrusion, <NUM>-tuft, <NUM>-main shaft, <NUM>-shaftless threaded conveying rod, <NUM>-dirt outlet, <NUM>-opening, <NUM>-first protrusion, <NUM>-inclined plate, <NUM>-water inlet, <NUM>-pressure roller housing, <NUM>-water inlet of pressure roller housing, <NUM>-water supplementing port of pressure roller housing, <NUM>-drainage outlet of pressure roller housing, <NUM>-pressure spring, <NUM>-hairbrush, <NUM>-second protrusion, <NUM>-watering port, <NUM>-hairbrush water gap, <NUM>-second hairbrush assembly, <NUM>-hairbrush housing, <NUM>-water inlet, <NUM>-water supplementing port of hairbrush housing, <NUM>-electricity storage assembly, <NUM>-cover housing, <NUM>-dirty water tank, <NUM>-clean water tank, <NUM>-water pump, <NUM>-dust suction port, <NUM>-dust suction channel, <NUM>-access port, <NUM>-roller, <NUM>-dust cup, <NUM>-dust suction pump, and <NUM>-handle.

Embodiments of this utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings. The same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described with reference to the accompanying drawings below are exemplary, and are intended to explain this utility model, but should not be construed as limiting this utility model. On the basis of the embodiments in this utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall into the scope of protection of this utility model.

In the description of this utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" or the like is the orientation or position relationship based on the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this utility model. In the description of this utility model, "a plurality of/multiple" means two or more than two, unless otherwise specifically defined. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of this utility model, the term "arranged", "provided with", "connected to", "mounted", "sleeved over", "formed", "fixed to" or the like should be understood broadly unless otherwise specified and defined. For example, two elements may be fixedly connected, detachably connected or integrally connected; or may be mechanically connected or electrically connected; or may be directly connected or indirectly connected through an intermediate medium; or may be in internal communication or interact with each other. For those of ordinary skill in the art, the specific meaning of the above terms in this utility model can be understood according to specific situations.

Referring to <FIG>, as shown in <FIG>, a ground cleaning apparatus having a front dust collection function provided in this embodiment includes a cleaning device, a water storage device and a dust collection device.

The cleaning device includes a rolling brush <NUM>, a washing assembly <NUM>, a water retaining housing <NUM>, a pressure roller <NUM>, first hairbrush assemblies, a second hairbrush assembly <NUM> and a driving device <NUM>. The rolling brush <NUM> and the washing assembly <NUM> are both mounted in the water retaining housing <NUM>. The rolling brush <NUM> is a rotatable water-absorbing rolling brush. The washing assembly <NUM> is arranged on one side of the rolling brush <NUM>. The washing assembly <NUM> includes a conveying rod housing <NUM> and a threaded conveying rod <NUM> rotatably mounted in the conveying rod housing <NUM>. The conveying rod housing <NUM> is provided with a dirt outlet <NUM> in a rotary conveying direction of the threaded conveying rod <NUM>. The conveying rod housing <NUM> is provided with an opening <NUM> toward a direction of the rolling brush <NUM>. The water retaining housing <NUM> is arranged in a sealing fit with the conveying rod housing <NUM>. The water retaining housing <NUM> and the conveying rod housing <NUM> are configured to prevent water and dirt from spilling out.

The water storage device is provided with a dirty water tank <NUM> and a clean water tank <NUM>. The dirty water tank <NUM> and a clean water tank <NUM> are both arranged on a side, away from the rolling brush <NUM>, of the washing assembly <NUM>. The dirt outlet <NUM> is connected to the dirty water tank <NUM> through a blowoff pipe. The clean water tank <NUM> is connected to the cleaning device through a clean water pipe. Clean water conveyed by the clean water tank <NUM> is configured to clean the rolling brush <NUM>. A water pump <NUM> is arranged between the clean water tank <NUM> and the cleaning device. The water pump <NUM> is configured to pump the clean water in the clean water tank <NUM> into the cleaning device. Of course, a dirty water pump can be further arranged to pump the dirty water and dirt into the dirty water tank <NUM> through the dirt outlet <NUM>.

The dust collection device has a dust collection cover <NUM> and a dust suction rod <NUM>. The dust collection cover <NUM> is provided with a dust suction port <NUM>, a dust suction channel <NUM> and an access port <NUM>. The dust suction port <NUM> is arranged on a front side of the rolling brush <NUM>, and the dust collection device sucks dirt on the ground by way of the dust suction port <NUM>. The dust suction port <NUM> has foldable, retractable or detachable functions. A suction opening can be folded in case of dirty water, such that the dirty water is prevented from entering the suction opening to damage a suction device. The dust suction port <NUM> and the access port <NUM> are connected through the dust suction channel <NUM>, the access port <NUM> is arranged above the dust collection cover, and the dust collection cover <NUM> is detachably arranged above the cleaning device and the water storage device.

The dust suction rod <NUM> is detachably mounted at the access port <NUM>, the dust suction rod <NUM> is provided with a dust cup <NUM>, a dust suction pump <NUM> and a handle <NUM>, the dust cup <NUM> is connected to the access port <NUM> through a dust collecting pipeline, the dust suction pump <NUM> is configured to pump the dirt into the dust cup <NUM> by way of the dust suction port <NUM>, and the handle <NUM> is arranged at an end away from the dust suction port <NUM>, of the dust suction rod <NUM>.

The ground cleaning apparatus further includes rollers <NUM>, the rollers <NUM> are respectively mounted on both sides of the water storage device or the dust collection cover <NUM>, and the rollers <NUM> are away from one end of the dust suction port <NUM>.

Referring to <FIG>, as shown in <FIG>, the cleaning device includes a rolling brush <NUM>, washing assembly <NUM>, a water retaining housing <NUM>, pressure rollers <NUM>, first hairbrush assemblies and a second hairbrush assembly <NUM>.

The rolling brush <NUM> is a water-absorbing rolling brush, and the rolling brush <NUM> is rotatably mounted on inner walls of both sides of the water retaining housing <NUM>.

The rolling brush <NUM> is the water-absorbing rolling brush. The rolling brush usually includes a water-absorbing plush cotton rolling brush or a water-absorbing sponge rolling brush such as polyvinyl alcohol sponge. In this example, the rolling brush <NUM> includes a rolling shaft <NUM> and a flexible cleaning layer. The flexible cleaning layer is detachably sleeved over the rolling shaft <NUM>. The flexible cleaning layer is a lint water absorption layer <NUM> or a water-absorbing rubber layer. Of course, the flexible cleaning layer can also be made of other water-absorbing materials. The rolling brush or mop in the related art is manually cleaned. Even if part of products claim to have the self-cleaning function, the actual effect is poor.

The washing assembly <NUM> is arranged on one side of the rolling brush <NUM>. As shown in <FIG>, the washing assembly <NUM> is rotatably mounted on inner walls of both sides of the water retaining housing <NUM>. The washing assembly <NUM> includes a threaded conveying rod <NUM> and a conveying rod housing <NUM>. As shown in <FIG>, the threaded conveying rod <NUM> is arranged in proximity to or attached to the rolling brush <NUM>. The conveying rod housing <NUM> is provided with a semiclosed cavity. The threaded conveying rod <NUM> is rotatably mounted in the semiclosed cavity of the conveying rod housing <NUM>. The threaded conveying rod <NUM> is arranged in proximity to or attached to an inner wall of the conveying rod housing <NUM> in a fit manner. The conveying rod housing <NUM> is provided with a dirt outlet <NUM> in a rotary conveying direction of the threaded conveying rod <NUM>. The conveying rod housing <NUM> is provided with an opening <NUM> toward a direction facing the rolling brush <NUM>. The threaded conveying rod <NUM> is provided with at least one threaded groove <NUM>. The threaded conveying rod <NUM> is configured to convey the dirty water and dirt to the other end from one end. In this example, the threaded conveying rod <NUM> is detachably mounted in the conveying rod housing <NUM>. The threaded conveying rod <NUM> and the conveying rod housing <NUM> are coaxially arranged. A center axis direction of the washing assembly <NUM> is consistent with that of the rolling brush <NUM>. An outer diameter of the rolling brush <NUM> is greater than that of the threaded conveying rod <NUM>.

According to this utility model, the rolling brush mops the floor in a humid state to clean the ground. The dirty water on the rotary rolling brush and the clean water are continuously replaced through the threaded conveying rod <NUM>, such that the dirty water and dirt are drained to the dirty water tank or other designated spots through the semiclosed cavity, and moreover, the self-cleaning function of the rolling brush is achieved. The above structure is quite simple and compact, such that the product structure is simplified and the cost is lowered favorably.

The threaded conveying rod <NUM> is a strip-shaped member provided with the threaded groove <NUM> on the surface. The threaded conveying rod <NUM> includes a main shaft <NUM> and thread protrusions <NUM>. The thread protrusions <NUM> are spirally wound to the other end from one end of the main shaft <NUM>. The threaded groove <NUM> is formed between the thread protrusions <NUM>. The arrangement direction of the threaded groove can be adaptively adjusted according to the rotating direction and the transmission direction of the threaded conveying rod <NUM>. The main shaft <NUM> can also be provided with multiple thread protrusions <NUM>, that is, the multiple thread protrusions <NUM> form multiple different threaded grooves <NUM>. Preferably, the rotating directions of the threaded conveying rod <NUM> and the rolling brush <NUM> are opposite, such that the rotating resistance of the rolling brush <NUM> is reduced.

The threaded conveying rod is arranged in proximity to or attached to the rolling brush and rotates reverse to the rolling brush. The threaded conveying rod and the rolling brush form two cylinders which rotate relatively to squeeze each other, such that the resistance applied to the rolling brush is small, and therefore, the power loss of the rolling brush is small, the driving power of the rolling brush can be saved, the surfaces of the rolling brush and the threaded conveying rod are not damaged, and the service life of the product is prolonged.

The threaded conveying rod <NUM> is arranged in proximity to or attached to the rolling brush <NUM>. In an embodiment, the threaded conveying rod <NUM> is arranged in proximity to the rolling brush <NUM>. The dirty water and dirt on the rolling brush fall into the conveying rod housing <NUM> through the opening <NUM>. The threaded conveying rod <NUM> conveys the dirty water and dirt to the other end from one end of the conveying rod housing <NUM>. In another embodiment, the threaded conveying rod <NUM> is arranged in contact with the rolling brush <NUM>. The threaded conveying rod <NUM> cannot only convey the dirty water and dirt to the other end from one end of the conveying rod housing <NUM>, but also convey the clean water at one end of the conveying rod housing <NUM>. The clean water is rotatably conveyed through the threaded conveying rod <NUM>. The clean water is in contact with the surface of the rolling brush <NUM> to clean the rolling brush. Moreover, the threaded conveying rod and the rolling brush are in pressure contact, so as to better squeeze the water on the rolling brush and peel the dirt on the rolling brush. Of course, a degree of tightness of contact between the threaded conveying rod <NUM> and the rolling brush <NUM> can be adjusted by an adjusting member.

The threaded groove is formed on the threaded conveying rod. The threaded conveying rod conveys the dirty water and dirt squeezed by the rolling brush to the dirt outlet at the other end from one end of the threaded conveying rod along the threaded groove, such that the dirt outlet and the water inlet can be preferably formed in both ends of the threaded conveying rod to save the space, which facilitates a miniaturized or diverse design of the product. Of course, the dirt outlet and the water inlet can also be formed in other parts. In addition, the spiral groove is formed on the threaded conveying rod, such that the surface of the threaded conveying rod is protruding and recessed. When the threaded conveying rod presses the rolling brush and rotates, the protruding and recessed surface of the threaded conveying rod kneads, pats, and squeezes the rolling brush, such that the scrubbing and drying effects of the surface of the rolling brush are better. The threaded conveying rod squeezes the rolling brush to squeeze the dirty water and dirt on the rolling brush, such that the rolling brush is in a semi-wet, micro-wet or micro-dry state, which further facilitates self-cleanliness or automatic squeezing of the rolling brush.

Preferably, as shown in <FIG>, in another embodiment of the threaded conveying rod <NUM>, the threaded conveying rod <NUM> is provided with multiple tufts <NUM>. The tufts <NUM> are arranged in the threaded grooves <NUM> and/or the thread protrusions <NUM> formed between the threaded grooves <NUM>. Preferably, the tufts <NUM> are arranged on the thread protrusions <NUM>. The tufts <NUM> can improve a friction force between the threaded conveying rod <NUM> and the rolling brush <NUM>, so as to prevent a situation that the threaded conveying rod cannot follow the rolling brush <NUM> to rotate due to slip.

In another embodiment, as shown in <FIG>, the threaded conveying rod <NUM> is a shaftless threaded conveying rod <NUM>.

A purpose of the threaded conveying rod <NUM> according to this utility model is as follows:
The threaded conveying rod <NUM> presses or is in contact with the rolling brush <NUM>. The degree of squeezing of the threaded conveying rod to the rolling brush is adjusted by the adjusting member. When the threaded conveying rod rotates, the protruding and recessed surface of the threaded conveying rod squeezes, kneads and pats the flexible cleaning layer on the surface of the rolling brush to squeeze the dirty water and dirt on the rolling brush <NUM> to flow into the threaded groove <NUM> of the threaded conveying rod <NUM>. With rotation of the threaded conveying rod <NUM>, the dirty water and dirt in the threaded groove <NUM> is spirally conveyed to the other end from one end of the threaded conveying rod <NUM>. On the other hand, the clean water can also be conveyed from one end of the threaded conveying rod <NUM>. When the threaded conveying rod <NUM> rotates and squeezes the rolling brush, the clean water is conveyed to the rolling brush in contact with the threaded conveying rod, such that the water is replaced to wash the rolling brush. The dirty water and particle dirt on the rolling brush are conveyed to the other end of the threaded conveying rod, such that the self-cleaning function of the rolling brush is achieved.

One side of the water retaining housing <NUM> covers a side, away from the conveying rod housing <NUM>, of the rolling brush <NUM>. The other side of the water retaining housing <NUM> extends to the conveying rod housing <NUM>. The water retaining housing <NUM> is arranged in a sealing fit with the conveying rod housing <NUM>. The water retaining housing <NUM> is configured to prevent overflow of the dirty water and dirt.

The pressure rollers <NUM> are rotatably mounted on inner walls of both sides of the water retaining housing <NUM>. Each of the pressure rollers <NUM> presses the rolling brush <NUM>. The pressure roller <NUM> is located above the washing assembly <NUM>. Preferably, an outer diameter of the rolling brush <NUM> is greater than that of the pressure roller <NUM> and multiple pressure rollers <NUM> can be provided.

The pressure roller <NUM> is arranged to further squeeze the rolling brush <NUM>, such that the squeezing effect of the rolling brush <NUM> is better, and water stains left on the cleaned ground are avoided or reduced. In addition, the particle dirt adhered to the surface of the rolling brush is further blocked.

The pressure roller <NUM> is in pressure contact with the rolling brush <NUM> through the adjusting member. The adjusting member can adjust the degree of tightness between the pressure roller <NUM> and the rolling brush <NUM>. The adjusting member is preferably an elastic mechanism with certain elasticity. The elastic mechanism can be a component with certain elasticity such as a pressure spring or a spring. Of course, the adjusting member can also be an adjusting valve. In this example, the adjusting member configured to adjust the pressure roller <NUM> and the rolling brush <NUM> is a pressure spring <NUM>. Both ends of the pressure roller <NUM> are mounted in mounting holes of the water retaining housing <NUM>. The pressure spring is arranged in each of the mounting holes. The pressure spring <NUM> squeezes the pressure roller <NUM> on the rolling brush <NUM>. Preferably, the rotating direction of the pressure roller <NUM> is opposite to that of the rolling brush <NUM>, so as to reduce the resistance when the rolling brush rotates.

When the pressure roller <NUM> is additionally arranged, a hollowed structure is arranged at a position, close to the opening <NUM> at a top of the conveying rod housing <NUM>; and/or a gap is arranged between an upper edge of the opening <NUM> and the rolling brush <NUM>; and the dirty water and dirt squeezed by the pressure roller <NUM> enter the conveying rod housing <NUM> through the hollowed structure or the gap.

As shown in <FIG>, a perforated dirt outlet <NUM> is formed in the conveying rod housing <NUM> along the rotary conveying direction of the threaded conveying rod <NUM>. After the dirty water and dirt are conveyed by the threaded conveying rod <NUM> to the other end from one end, the dirty water and dirt are discharged from the dirt outlet <NUM>. A water inlet <NUM> is further formed in an end, away from the dirt outlet <NUM>, of the conveying rod housing <NUM>. The dirt outlet <NUM> is formed in an end of the conveying rod housing <NUM> or on a side wall of the conveying rod housing <NUM>. In a similar way, the water inlet <NUM> can also be formed in the end of the conveying rod housing <NUM> or on the side wall of the conveying rod housing <NUM>.

The opening <NUM> is formed in a side, facing the rolling brush <NUM>, of the conveying rod housing <NUM>. An inclined plate <NUM> extends outwards from a lower edge of the opening <NUM>, and the inclined plate <NUM> extends toward a bottom of the rolling brush <NUM>. The inclined plate <NUM> is in contact with or is close to the ground. Preferably, the inclined plate <NUM> is in contact with the ground, the inclined plate <NUM> can scoop up the dirty water and dirt on the ground, and a gap is formed between the inclined plate <NUM> and the rolling brush <NUM>, such that the dirty water and dirt can enter into the conveying rod housing <NUM> through the gap. In this example, the length of the inclined plate <NUM> is consistent with that of the opening.

Preferably, the length direction of the opening <NUM> is consistent with that of the conveying rod housing <NUM>, and the length of the opening <NUM> is not less than that of the rolling brush <NUM>. Of course, the length of the opening <NUM> is less than that of the rolling brush <NUM>, which can also be implemented as a non-preferred design solution. In this example, the length of the opening <NUM> is consistent with that of the rolling brush <NUM>.

The working principle of the pressure roller <NUM> according to this utility model is as follows:
The pressure roller <NUM> presses the rolling brush <NUM>. The degree of squeezing of the pressure roller <NUM> to the rolling brush <NUM> is adjusted by the adjusting member. The pressure roller <NUM> squeezes the rolling brush <NUM> again to decontaminate, so as to squeeze the dirty water and dirt on the rolling brush <NUM>. The squeezed dirty water and dirt flow into the threaded groove <NUM> of the threaded conveying rod <NUM> along the surface of the rolling brush <NUM>.

The cleaning device is provided with at least one first hairbrush assembly. The first hairbrush assembly is between the pressure roller <NUM> and the threaded conveying rod <NUM>. The first hairbrush assembly is configured to scrape dirt on the rolling brush <NUM>. Two embodiments for the first hairbrush assembly are provided. In one embodiment, the conveying rod housing <NUM> is provided with multiple first protrusions <NUM> at an upper edge position of the opening <NUM>, the multiple first protrusions <NUM> are the first hairbrush assemblies, and the first protrusions <NUM> face the rolling brush and are in contact with the rolling brush. The first protrusions <NUM> can scrape dirt on the rolling brush <NUM>. In the other embodiment, the first hairbrush assembly is a hairbrush <NUM>. As shown in <FIG>, the hairbrush <NUM> is rotatably mounted in the water retaining housing <NUM>, multiple second protrusions <NUM> are arranged on a surface of the hairbrush <NUM>, and the second protrusions <NUM> are in contact with the rolling brush <NUM>. The second protrusions <NUM> can scrape dirt on the rolling brush <NUM>. Of course, the two types of first hairbrush assemblies can be both arranged. The first hairbrush assembly is arranged to brush the particulate matters or flexible particulate matters on the rolling brush. When the pressure roller and the rolling brush rotate at a relatively high speed, a lot of accumulated water is generated below the pressure roller. The first hairbrush assembly is arranged below the pressure roller. The hairbrush can drain the accumulated water to the conveying rod housing to prevent the accumulated water from splashing. The first hairbrush assembly also can play a role of fluffing the lint water absorption layer.

The cleaning device further includes a second hairbrush assembly <NUM>. The second hairbrush assembly <NUM> is located on a side, away from the first hairbrush assembly, of the pressure roller <NUM>. The second hairbrush assembly <NUM> is rotatably mounted in the water retaining housing <NUM>. The second hairbrush assembly <NUM> is a rod-shaped member provided with multiple wool tops on a surface thereof, and the wool tops are in contact with the rolling brush <NUM>. The lint water absorption layer <NUM> is arranged on a surface of the rolling brush <NUM>, the wool tops are configured to fluff the lint water absorption layer <NUM>, and the second hairbrush assembly <NUM> is a rotary second hairbrush assembly or non-rotary second hairbrush assembly.

The cleaning device is further provided with the self-cleaning function. The clean water is supplemented to the rolling brush while the rolling brush cleans the dirty water and dirt to achieve the self-cleaning function of the rolling brush, which helps to clean the ground better and cleaner. The following one or more water supplementation modes of the rolling brush are provided:
In an embodiment, the conveying rod housing <NUM> is provided with a water inlet <NUM>. As shown in <FIG>, the water inlet <NUM> is formed at an end, away from the dirt outlet <NUM>, of the conveying rod housing <NUM>, and the water inlet <NUM> is connected to the clean water tank <NUM> through the clean water pipe. The dirty water and dirt are rotatably conveyed by the threaded conveying rod <NUM> to one end of the dirt outlet <NUM> from one end of the water inlet <NUM> of the conveying rod housing <NUM>.

In an embodiment, at least one water supplementing port is formed in the inner wall of the water retaining housing <NUM>. The water supplementing port faces the rolling brush <NUM>. The water supplementing port is connected to the clean water tank <NUM> through the clean water pipe. Preferably, the water supplementing port is between the washing assembly <NUM> and the pressure roller.

In an embodiment, the hairbrush housing <NUM> is sleeved over the hairbrush <NUM>. As shown in <FIG>, the hairbrush housing <NUM> is accommodated in the water retaining housing <NUM>. The second protrusions <NUM> on the hairbrush <NUM> are spirally arranged on the hairbrush <NUM>. The hairbrush <NUM> is rotatably mounted in the hairbrush housing <NUM>.

The hairbrush housing <NUM> has a water inlet <NUM> and a water supplementing port <NUM> of the hairbrush housing. The water inlet <NUM> is formed at one end of the hairbrush housing <NUM>, the water supplementing port <NUM> of the hairbrush housing faces the rolling brush <NUM>, and the water inlet <NUM> is connected to the clean water tank <NUM> through the clean water pipe.

In an embodiment, a pressure roller housing <NUM> is sleeved over the pressure roller <NUM>. As shown in <FIG>, a spiral groove is formed in the surface of the pressure roller <NUM>. The spiral groove can convey the water to the other end from one end as the pressure roller <NUM> rotates. The pressure roller housing <NUM> is provided with a water inlet <NUM> of the pressure roller housing, a water supplementing port <NUM> of the pressure roller housing and a drainage outlet <NUM> of the pressure roller housing. The water inlet <NUM> of the pressure roller housing is located at one end of the pressure roller housing <NUM>, the drainage outlet <NUM> of the pressure roller housing is located at the other end of the pressure roller housing <NUM>, the drainage outlet <NUM> of the pressure roller housing is formed at a bottom of the pressure roller housing <NUM>, the water supplementing port <NUM> of the pressure roller housing faces the rolling brush <NUM>, and the water inlet <NUM> of the pressure roller housing is connected to the clean water tank <NUM> through the clean water pipe.

In an embodiment, as shown in <FIG>, the hairbrush <NUM> has a hollow cavity, multiple watering ports <NUM> and at least one hairbrush water gap <NUM>. The watering ports <NUM> and the hairbrush water gap <NUM> are both connected to the hollow cavity, the length direction of the hollow cavity is consistent with that of the hairbrush <NUM>, the multiple watering ports <NUM> are arranged on the hairbrush <NUM>, the hairbrush water gap <NUM> is arranged at one end of the hairbrush <NUM>, and the hairbrush water gap <NUM> is connected to the clean water tank <NUM> through the clean water pipe.

The water supplementation mode of the rolling brush can be any one water supplementation mode above or a free combination of any two or more of water supplementation modes above.

In another embodiment, the ground cleaning apparatus having a front dust collection function further includes a driving device <NUM>. The driving device <NUM> is configured to drive the rolling brush <NUM> to rotate.

In an embodiment, the driving device <NUM> can be connected to the rolling brush <NUM>. As shown in <FIG> and <FIG>, the driving device <NUM> drives the rolling brush <NUM> to rotate. The rolling brush rotates to drive the threaded conveying rod <NUM> to rotate in a reverse direction, such that the threaded conveying rod <NUM> has the function of conveying water and dirt. Of course, the driving device <NUM> can also be arranged inside the rolling shaft <NUM> of the rolling brush <NUM>.

In an embodiment, the rolling brush <NUM> is connected to one driving device, the threaded conveying rod <NUM> is connected to the other driving device, and the rolling brush and the threaded conveying rod <NUM> are both driven by the driving devices to rotate.

In an embodiment, the rolling brush <NUM> is not provided with a direct driving device. The driving device is directly connected to the threaded conveying rod <NUM>, and the threaded conveying rod <NUM> rotates to drive the rolling brush <NUM> to rotate in the reverse direction.

In an embodiment, the rolling brush <NUM> and the threaded conveying rod <NUM> are both not provided with the driving devices. When the apparatus is used by a user, and the cleaning device is pushed forward, the rolling brush is driven to rotate. The rolling brush rotates to drive the threaded conveying rod <NUM> to rotate in a reverse direction, such that the threaded conveying rod <NUM> has the function of conveying water and dirt.

For the above embodiments of the four driving devices, in a case of the pressure roller, and/or another driving device, the driving device can be connected to the pressure roller <NUM> and drives the pressure roller <NUM> to rotate.

In this example, the ground cleaning apparatus having a front dust collection function further includes an electricity storage assembly <NUM>, and the electricity storage assembly <NUM> is electrically connected to the driving device <NUM>.

In this example, the ground cleaning apparatus having a front dust collection function further includes a cover housing <NUM>. The driving device and the electricity storage assembly are both arranged on the water retaining housing <NUM>. The length directions of the driving device and the electricity storage assembly are consistent with that of the rolling brush. The cover housing <NUM> covers the driving device <NUM> and the electricity storage assembly <NUM>. The cover housing is in close fit to a top of the water retaining housing <NUM>.

The technical solution of the ground cleaning apparatus having a front dust collection function in the patent at least has the following one or more beneficial effects:
The dust suction port of the apparatus is formed in front of the cleaning device which performs dry suction first and then performs wet mopping. The cleaning device sucks particle dirt on the ground first and then only needs to clean dirty water and a small amount of dirt, such that the damage to the cleaning device caused by large particle dirt is reduced, and the service life of the cleaning device is prolonged. The cleaning device performs dry suction and wet mopping separately, such that the cleaning effect is better.

The first hairbrush assemblies are additionally arranged. Protrusions such as the first protrusions or second protrusions on the first hairbrush assemblies and the rolling brush form point-to-face contacts. Compared with a face-to-face contact formed by a water scraping strip or the pressure rod and the rolling brush, flexible dirt such as hairs and noodles adhered to the rolling brush cannot be removed by way of an acting force of the face-to-face contact formed by the water scraping strip or the pressure rod, and the flexible dirt is even squeezed and attached to the rolling brush more firmly. For the first hairbrush assemblies forming point-to-face contacts, the protrusions or second protrusions thereon are configured to hook off the flexible dirt adhered to the rolling brush, such that the first hairbrush assemblies are configured to remove dirt on the rolling brush more effectively and thoroughly, thereby effectively improving the removal effect of the dirt on the rolling brush. The surface of the rolling brush is clean continuously, which helps to improve the ground cleaning effect.

In the description of the specification, the description with reference to the terms "one embodiment", "some embodiments", "another embodiment", "still another embodiment", "other embodiments", "example", "specific example", "some examples" or the like means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of this utility model. In this specification, the schematic expression of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can join and combine different embodiments or examples described in this specification.

Claim 1:
A ground cleaning apparatus having a front dust collection function,
comprising a cleaning device, a water storage device and a dust collection device, wherein
the cleaning device comprises a rolling brush (<NUM>), a washing assembly (<NUM>) and a water retaining housing (<NUM>); the rolling brush (<NUM>) and the washing assembly (<NUM>) are both mounted in the water retaining housing (<NUM>); the rolling brush (<NUM>) is a rotatable water-absorbing rolling brush; the washing assembly (<NUM>) is arranged on one side of the rolling brush (<NUM>); the washing assembly (<NUM>) comprises a conveying rod housing (<NUM>) and a threaded conveying rod (<NUM>) rotatably mounted in the conveying rod housing (<NUM>); the conveying rod housing (<NUM>) is provided with a dirt outlet (<NUM>) in a rotary conveying direction of the threaded conveying rod (<NUM>); the conveying rod housing (<NUM>) is provided with an opening (<NUM>) toward a direction of the rolling brush (<NUM>); the water retaining housing (<NUM>) is arranged in a sealing fit with the conveying rod housing (<NUM>); and the water retaining housing (<NUM>) and the conveying rod housing (<NUM>) are configured to prevent water and dirt from spilling out;
the water storage device is provided with a dirty water tank (<NUM>), and the dirt outlet (<NUM>) is connected to the dirty water tank (<NUM>) through a blowoff pipe; and
the dust collection device is provided with a dust suction port (<NUM>), the dust suction port (<NUM>) is arranged on a front side of the rolling brush (<NUM>), and the dust collection device sucks dirt on the ground by way of the dust suction port (<NUM>).