Brush head module, cleaning machine and working method of cleaning machine

Abstract

The invention relates to a brush head module which comprises a shaft rod. The disc body is connected to the lower end of the shaft rod; the at least two deformable scrapers are arranged on the disc body in the circumferential direction; the piezoelectric strain gauges extend in the length direction of the scraping pieces and are arranged on the scraping pieces in an attached mode. According to the brush head module, the form of the doctor blade can be changed according to working requirements so as to achieve different functional effects. The invention further relates to a cleaning machine, the cleaning machine comprises a main body, a water outlet mechanism and the brush head module, at least one dust collection cavity with a downward opening is formed in the main body, the brush head module is rotatably arranged in the dust collection cavity, and the water outlet mechanism discharges water to the position of the brush head module. The cleaning machine can adjust the water treatment effect. The invention further relates to a working method of the cleaning machine, different power supply voltages are provided for the piezoelectric strain gauge according to ground material information and moving direction data, the piezoelectric plate deforms based on the power supply voltages so that the scraping piece deforms into different working forms, and then the optimal cleaning effect is achieved.

Description

Technical Field

[0001] The invention relates to a brush head module, a cleaning machine using the brush head module, and a working method of the cleaning machine. Background Art

[0002] As people's requirements for environmental hygiene continue to increase, cleaning machine products such as sweepers and washing machines are increasingly widely used. In existing cleaning machines, roller brush structures and disc brush structures are used as cleaning components, such as the Chinese utility model patent "A brush head module for cleaning machine and cleaning machine" with authorization announcement number CN215838846U (application number 202121691478.5), in which the cleaning machine disclosed uses a disc brush structure as a cleaning component. Specifically, the shell has a dust suction chamber, and the brush head is rotatably arranged in the dust suction chamber and the rotation axis extends vertically. By arranging a support plate under the brush head substrate, the scraper of the brush head passes through the through hole opened on the support plate and contacts the surface to be cleaned. At the moment when the brush head rotates or stops, the support plate is connected to the first elastic member, and the speed difference with the substrate is generated due to inertia, so that the substrate and the support plate produce a small relative rotation in a short time, and then the scraper is partially detached from the through hole. When cleaning, the hair wrapped around the bottom of the scraper will be intercepted at the bottom of the support plate to achieve the purpose of removing hair. That is, when in use, the dirt on the ground can be cleaned by the contact between the scraper and the ground. In order to remove stubborn stains on the ground or to improve the cleanliness of the ground, the brush head module of this structure will spray water during cleaning to keep the water within the rotation range of the scraper and continuously act on the ground to form a cleaning force. However, the scraper of this structure is generally not absorbent, and the brush head has limited water locking ability, resulting in the water being quickly sucked away by the fan after passing through the brush head. The contact time between the water and the ground is not long, and the water utilization efficiency is low. In addition, when the cleaning machine is stopped, water stains are easily left under the disc brush. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a brush head module capable of changing the shape of the scraper blade in view of the above-mentioned prior art.

[0004] The second technical problem to be solved by the present invention is to provide a cleaning machine that uses the aforementioned brush head module to adjust the water treatment effect in view of the above-mentioned prior art.

[0005] The third technical problem to be solved by the present invention is to provide a working method of the aforementioned cleaning machine in view of the above-mentioned prior art, so that the cleaning machine can achieve the optimal cleaning effect according to different ground conditions.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a brush head module, comprising

[0007] Axle rod;

[0008] A disc body connected to the lower end of the shaft;

[0009] The scraper blades are deformable and include at least two scrapers which are circumferentially arranged on the disc body;

[0010] It is characterized by: it also includes

[0011] The piezoelectric strain gauge extends along the length direction of the scraper blade and is attached to each scraper blade.

[0012] In order to facilitate the transmission connection between the shaft and the driving mechanism, a gear is formed on the shaft.

[0013] In order to facilitate the delivery of water to the brush head module, a through hole for passing water is axially arranged in the shaft, and an opening is provided on the disc body corresponding to the through hole.

[0014] In order to facilitate power supply for the piezoelectric strain gauge, a positive potential conductive sheet and a negative potential conductive sheet for connecting to a power source are embedded in the disk body, and the piezoelectric strain gauge is electrically connected to the positive potential conductive sheet and the negative potential conductive sheet.

[0015] Preferably, the piezoelectric strain gauge is electrically connected to the positive potential conductive sheet and the negative potential conductive sheet through an electrical connecting sheet.

[0016] In order to facilitate electrical connection with multiple piezoelectric strain gauges, the positive potential conductive sheet and the negative potential conductive sheet are both ring-shaped and embedded in the disk body along the up and down directions.

[0017] In order to facilitate the electrification of the positive potential conductive sheet and the negative potential conductive sheet, the shaft rod is embedded with an annular positive potential conductor and a negative potential conductor, the positive potential conductor is electrically connected to the positive potential conductive sheet, the negative potential conductor is electrically connected to the negative potential conductive sheet, and the free ends of the positive potential conductor and the negative potential conductor are exposed to form an annular conductive portion;

[0018] An electric connector electrically connected to a power source is arranged beside the shaft, and the conductive parts of the positive potential conductor and the negative potential conductor are rotatably contacted and electrically connected with the electric connector.

[0019] Preferably, the lower end of the positive potential conductor extends downward to overlap with the positive potential conductive sheet, and the lower end of the negative potential conductor extends downward to overlap with the negative potential conductor.

[0020] In order to facilitate the rotational docking with the external electrical connector, a mounting plate is circumferentially protruded on the outer surface of the shaft rod, and a positive potential connecting plate is radially extended into the mounting plate at the upper end of the positive potential conductor, and a negative potential connecting plate is radially extended into the mounting plate at the upper end of the negative potential conductor. The outer circumferences of the positive potential connecting plate and the negative potential connecting plate extend toward the surface of the mounting plate and are exposed to form an annular conductive portion.

[0021] Preferably, the piezoelectric strain gauge is a piezoelectric ceramic sheet.

[0022] Preferably, the scraper blade is centrally symmetrically arranged on the disc body, and an angle A is formed between a tangent line of a connecting end of the scraper blade and a meridian line of the disc body, and 0°<A≤90°.

[0023] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a cleaning machine, including a main body and a water outlet mechanism, the main body includes at least one dust suction chamber opening downward, and is characterized in that: it also includes a brush head module as mentioned above, the brush head module is rotatably arranged in the dust suction chamber, and the water outlet mechanism discharges water to the brush head module position.

[0024] A cleaning machine, comprising a main body and a water outlet mechanism, wherein the main body comprises at least one dust suction chamber opening downward, wherein a mounting seat is arranged in the dust suction chamber, and wherein the cleaning machine further comprises a brush head module as described above, wherein the water outlet mechanism discharges water toward the brush head module;

[0025] The brush head module is rotatably arranged on a mounting base, and an electrical connector connected to a power source is fixedly arranged on the mounting base.

[0026] As an improvement, a through hole for passing water is axially provided in the shaft, and an opening is provided on the disc body corresponding to the through hole;

[0027] The water outlet mechanism comprises a water pipe disposed in the through hole facing the opening.

[0028] As an improvement, the lower end of the water pipe is connected with a nozzle.

[0029] As an improvement, a first detector for detecting the material of the ground is provided on the main body.

[0030] As an improvement, a second detector for detecting the moving direction is provided on the main body.

[0031] In order to more conveniently adjust the voltage output to the piezoelectric strain gauge and thus more conveniently change the scraper shape, a voltage regulating circuit is provided in the main body, and the piezoelectric strain gauge in the brush head module is electrically connected to the power supply through the voltage regulating circuit.

[0032] In order to more conveniently adjust the voltage output to the piezoelectric strain gauge and thus more conveniently change the shape of the scraper, a voltage regulating circuit is provided in the main body, and the electrical connector is electrically connected to the voltage regulating circuit.

[0033] For convenient installation, the voltage regulating circuit is embedded in the mounting seat, and an embedding hole is provided on the mounting seat corresponding to each electrical connector. The electrical connector is tightly inserted in the embedding hole and is electrically connected to the voltage regulating circuit.

[0034] In order to ensure good electrical connectivity between the electrical connector and the conductive portion, limiting members for limiting the electrical connector are provided on both sides of each conductive portion.

[0035] The technical solution adopted by the present invention to solve the third technical problem is: a working method of a cleaning machine, characterized in that: the cleaning machine as described above is adopted;

[0036] When the cleaning machine is cleaning, it obtains information about the material of the ground on which the cleaning machine is located and the moving direction of the cleaning machine. Different power supply voltages are provided to the piezoelectric strain gauge based on the ground material information and the moving direction data. The piezoelectric strain gauge deforms based on the supply voltage, causing the scraper to deform into different working forms.

[0037] As an improvement, based on different power supply voltages, the scraper blade is deformed into a first working form that is spirally bent relative to the rotation direction to perform floor cleaning work; or

[0038] The scraper blade is deformed into a second working state extending in a divergent shape to perform ground scraping work; or

[0039] The scraper blade is deformed into a third working state in which the scraper blade is bent in a reverse spiral shape relative to the rotation direction, so as to drive the water stain to be discharged centrifugally.

[0040] Preferably, when the cleaning machine performs cleaning work:

[0041] When the obtained ground material is a conventional ground and the moving direction of the cleaning machine is forward, the water outlet mechanism is controlled to discharge water to the brush head module area, the brush head module is controlled to rotate at a speed A, and the power supply voltage to the piezoelectric strain gauge is controlled to be V1. The piezoelectric strain gauge is deformed based on the power supply voltage V1, so that the scraper blade is deformed into a first working form that is spirally bent relative to the rotation direction. The scraper blade gathers water near the brush head module as the brush head module rotates to perform cleaning work;

[0042] When the obtained ground material is a conventional ground and the moving direction of the cleaning machine is backward, the water outlet mechanism is controlled to discharge water to the brush head module area, the brush head module is controlled to rotate at a speed A, and the power supply voltage to the piezoelectric strain gauge is controlled to be V2, V2>V1, the piezoelectric strain gauge is deformed based on the power supply voltage V2, so that the scraper is deformed into a second working form extending in a divergent shape, and the scraper scrapes off the water stains on the ground as the brush head module rotates;

[0043] When the floor material is carpet and the cleaning machine is moving forward or backward, the water outlet mechanism is controlled to stop discharging water to the brush head module area, and the brush head module is controlled to rotate at a speed B, B<A, and the power supply voltage to the piezoelectric strain gauge is controlled to be V1. The piezoelectric strain gauge is deformed based on the power supply voltage V1, so that the scraper blade is deformed into a first working form that is spirally bent relative to the rotation direction. The scraper blade gathers water near the brush head module as the brush head module rotates to perform cleaning.

[0044] As an improvement, after the cleaning machine obtains the stop signal, the water outlet mechanism is controlled to stop discharging water to the brush head module area, and the brush head module is controlled to continue rotating at a speed A for a time a;

[0045] At the same time, the power supply voltage of the piezoelectric strain gauge is controlled to be V3, V3>V2. The piezoelectric strain gauge is deformed based on the power supply voltage V3, so that the scraper blade is deformed into a third working form with a reverse spiral bending relative to the rotation direction. As the brush head module rotates, the scraper blade drives the water stains to be centrifugally discharged to the periphery of the brush head module.

[0046] As an improvement, at a time b before the brush head module stops rotating, b<a, the power supply voltage to the piezoelectric strain gauge is controlled to be V1. The piezoelectric strain gauge deforms based on the power supply voltage V1, causing the scraper to reset and deform into a first working form that is spirally bent relative to the rotation direction.

[0047] Compared with the prior art, the advantages of the present invention are: the brush head module of the present invention has a piezoelectric strain gauge attached to each scraper blade, so that the scraper blade forms different working modes based on the deformation of the piezoelectric strain gauge by adjusting the power supply voltage of the piezoelectric strain gauge, and different cleaning needs are met based on the scraper blade being in different working modes. In particular, when used in a cleaning machine that cooperates with water for cleaning, the effect on the water on the ground is different based on the different working modes of the scraper blade, and thus the needs of locking water, scraping water, and draining water in the cleaning work can be met as needed.

[0048] A cleaning machine using the brush head module can control the shape of the scraper based on the working state of the cleaning machine to meet different water treatment needs and optimize the user experience.

[0049] The working method of the cleaning machine controls the deformation of the piezoelectric sheet according to the ground material information and the moving direction data, thereby making the scraper strip in different shapes, so as to better meet the different water treatment effects in different working stages of the cleaning work. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 4 is a three-dimensional diagram of a brush head module in an embodiment of the present invention.

[0051] Figure 2 4 is a cross-sectional view of a brush head module in an embodiment of the present invention.

[0052] Figure 3 It is a three-dimensional diagram of the scraper blade in the second working state according to the embodiment of the present invention.

[0053] Figure 4 It is a three-dimensional diagram of the scraper blade in the third working state according to the embodiment of the present invention.

[0054] Figure 5 It is a three-dimensional diagram of a cleaning machine in an embodiment of the present invention.

[0055] Figure 6 2 is a cross-sectional view of a cleaning machine in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The present invention is further described in detail below with reference to the accompanying drawings.

[0057] like Figures 1 to 4 As shown, the brush head module in this embodiment includes a shaft 1, a disc 2, a scraper 3, and a piezoelectric strain gauge 4.

[0058] The shaft 1 is connected to the driving end of the driving mechanism when in use, and then rotates with the driving mechanism. The disk 2 is connected to the lower end of the shaft 1, so that the disk 2 can rotate synchronously with the rotation of the shaft 1. Based on the structure of the shaft 1 and the disk 2, when the brush head module in this embodiment rotates, the axis of the shaft 1 is the central axis and rotates horizontally.

[0059] The scraper blades 3 include at least two and are arranged on the disc body 2 along the circumferential direction. The scraper blades 3 are supported by a deformable material, such as plastic. When in use, the scraper blades 3 are in contact with the surface to be cleaned, and the cleaning work is achieved by the friction and scraping action between the scraper blades 3 and the surface to be cleaned. In order to ensure the contact area between the scraper strip and the surface to be cleaned, the scraper blades 3 in this embodiment are in the shape of a long strip as a whole, and the scraper blades 3 are arranged on the disc body 2 in a centrally symmetrical manner. There is an angle A between the tangent line of the connection end of the scraper blade 3 and the meridian line of the disc body 2, where 0°<A≤90°.

[0060] The piezoelectric strain gauge 4 extends along the length direction of the scraper 3 and is attached to each scraper 3. The piezoelectric strain gauge 4 can be made of various materials in the prior art that can be deformed based on different power supply voltages. In this embodiment, the piezoelectric strain gauge 4 uses a piezoelectric ceramic sheet. By controlling the power supply voltage of the piezoelectric strain gauge 4, the piezoelectric strain gauge 4 can be deformed into different shapes, thereby causing the scraper 3 to also deform into the shape of the piezoelectric strain gauge 4. The scraper 3 is deformed into different shapes on the disk 2, which can make the scraper 3 have different forces on the material on the ground when the disk 2 rotates, thereby meeting different cleaning needs during the cleaning process.

[0061] A gear 11 is formed on the shaft 1, and the gear 11 structure facilitates the transmission connection between the shaft 1 and the driving mechanism. For example, the gear 11 structure can be directly connected to the driving shaft of the driving mechanism through the gear 11 group structure. Or when multiple brush head modules are provided, the gear 11 can be connected to other brush head modules through a toothed belt, thereby realizing synchronous rotation drive of multiple brush head modules.

[0062] The brush head module can be used in various cleaning machines. In order to achieve a better cleaning effect, some cleaning machines will be equipped with a water outlet mechanism, that is, water is discharged to the brush head module through the water outlet mechanism, and the water falls on the cleaning surface. Based on the effect of the scraper 3 on the surface to be cleaned, the cleaning power can be improved. In order to meet the water supply to the brush head module and try to avoid water splashing when supplying water to the brush head module from the outside, in this embodiment, water is supplied to the brush head module from the center of the shaft 1. Specifically, a through hole 12 for water passage is axially penetrated in the shaft 1, and an opening 21 is provided on the disc 2 corresponding to the through hole 12. When in use, water can be supplied from the through hole 12 to the opening 21, and then the water will fall from the center of the disc 2 on the surface to be cleaned.

[0063] In order to conveniently power the piezoelectric strain gauge 4, a positive potential conductive sheet 22 and a negative potential conductive sheet 23 for connecting to a power source are embedded in the disk body 2, and the piezoelectric strain gauge 4 is electrically connected to the positive potential conductive sheet 22 and the negative potential conductive sheet 23. Specifically, the piezoelectric strain gauge 4 is electrically connected to the positive potential conductive sheet 22 and the negative potential conductive sheet 23 through an electrical connection sheet 41. In order to facilitate electrical connection with multiple piezoelectric strain gauges 4, the positive potential conductive sheet 22 and the negative potential conductive sheet 23 are both annular and embedded in the disk body 2 in the up and down direction.

[0064] In order to facilitate the electrification of the positive potential conductive sheet 22 and the negative potential conductive sheet 23, the shaft rod 1 is embedded with an annular positive potential conductor 13 and a negative potential conductor 14, the positive potential conductor 13 is electrically connected to the positive potential conductive sheet 22, the negative potential conductor 14 is electrically connected to the negative potential conductive sheet 23, and the free ends of the positive potential conductor 13 and the negative potential conductor 14 are exposed to form an annular conductive portion 15. An electrical connector 5 electrically connected to the power supply is provided next to the shaft rod 1, and the conductive portions 15 of the positive potential conductor 13 and the negative potential conductor 14 are rotatably contacted and electrically connected with the electrical connector 5.

[0065] Since the shaft 1 and the disk body 2 are two components, the accuracy of their docking is not required to be high. In order to ensure electrical connection, the lower end of the positive potential conductor 13 extends downward and overlaps with the positive potential conductive sheet 22, and the lower end of the negative potential conductor 14 extends downward and overlaps with the negative potential conductor 14.

[0066] In order to facilitate the rotational docking with the external electrical connector, a mounting plate 16 is convexly provided on the outer surface of the shaft 1 along the circumferential direction, a positive potential connecting plate 131 is provided at the upper end of the positive potential conductor 13 radially extending into the mounting plate 16, and a negative potential connecting plate 141 is provided at the upper end of the negative potential conductor 14 radially extending into the mounting plate 16, and the outer circumference of the positive potential connecting plate 131 and the negative potential connecting plate 141 extends to the surface of the mounting plate 16 and is exposed to form an annular conductive part 15. In this way, as the shaft 1 and the disk 2 rotate, the conductive part 15 is rotationally electrically connected to the external electrical connector, avoiding the problem of electrical connection line entanglement.

[0067] The brush head module can be used in various cleaning devices such as vacuum cleaners, sweeping robots, and floor scrubbers. A piezoelectric strain gauge 4 is attached to each scraper 3. By adjusting the power supply voltage of the piezoelectric strain gauge 4, the scraper 3 forms different working modes based on the deformation of the piezoelectric strain gauge 4. Different cleaning needs can be met based on the scraper 3 being in different working modes. In particular, when used in a cleaning machine that cooperates with water for cleaning, the effects on the water on the ground are different based on the different working modes of the scraper 3, and the needs of locking water, scraping water, and draining water in the cleaning work can be met as needed.

[0068] like Figure 5 and Figure 6 As shown, the present invention also relates to a cleaning machine, comprising a main body 6, a water outlet mechanism and the aforementioned brush head module. The main body 6 comprises at least one dust suction chamber 61 with an opening 21 facing downward, the number of dust suction chambers 61 is specifically set according to needs, and a brush head module is arranged in each dust suction chamber 61. The brush head module is rotatably arranged in the dust suction chamber 61, and the water outlet mechanism discharges water to the brush head module position, thereby cooperating with the rotation of the brush head module to perform cleaning work.

[0069] In order to facilitate the installation of the brush head module and the aforementioned electrical connector 5, as another embodiment, a mounting seat 62 is provided in the dust suction chamber 61, and the brush head module is rotatably arranged on the mounting seat 62, and an electrical connector 5 connected to a power source is fixedly arranged on the mounting seat 62. The electrical connector 5 in this embodiment is arranged vertically upward, and then rotatably electrically connected to the conductive parts 15 of the positive potential connecting plate 131 and the negative potential connecting plate 141.

[0070] In addition, in order to facilitate the water supply from the water outlet mechanism to the brush head module, based on the structure of the through hole 12 of the aforementioned shaft 1 and the opening 21 on the disc body 2, the water outlet mechanism includes a water pipe 7 arranged in the through hole 12 facing the opening 21, and the lower end of the water pipe 7 is connected to a nozzle 71, and then water is sprayed toward the bottom of the center of the disc body 2 through the nozzle 71, and then based on the action of the scraper 3 on the disc body 2 and the water, the floor is cleaned.

[0071] In addition, the main body 6 is provided with a first detector for detecting the material of the floor. For the convenience of detection, the first detector can be provided on the lower surface of the main body 6. The first detector can adopt various detection mechanisms in the prior art that can detect the material of the floor. The main body 6 is also provided with a second detector for detecting the moving direction. Based on the second detector, the moving direction of the cleaning machine can be detected and determined, thereby facilitating the control of the cleaning machine. The second detector can adopt various sensor mechanisms and corresponding working methods in the prior art to detect the moving direction of the cleaning machine.

[0072] In order to more conveniently adjust the voltage output to the piezoelectric strain gauge 4, and thus more conveniently change the shape of the scraper 3, a voltage regulating circuit is provided in the main body 6, and the piezoelectric strain gauge 4 in the brush head module is electrically connected to the power supply through the voltage regulating circuit. Specifically, the piezoelectric strain gauge 4 is electrically connected to the electrical connector 5 through the positive potential conductive sheet 22, the negative potential conductive sheet 23, the positive potential connecting plate 131, and the negative potential connecting plate 141, and the electrical connector 5 is electrically connected to the voltage regulating circuit, so as to realize the electrical connection between the piezoelectric strain gauge 4 and the voltage regulating circuit. Based on the voltage regulating circuit, when the power supply outputs the same voltage, different supply voltages can be output to the piezoelectric strain gauge 4 through the voltage regulating effect of the voltage regulating circuit. The voltage regulating circuit can adopt various voltage regulating circuits in the prior art.

[0073] The voltage regulating circuit is embedded in the mounting seat 62. The mounting seat 62 is provided with an embedding hole corresponding to each electrical connector 5. The electrical connector 5 is tightly inserted in the embedding hole and electrically connected to the voltage regulating circuit. In order to ensure good electrical connectivity between the electrical connector 5 and the conductive part 15, both sides of each conductive part 15 are provided with a stopper 8 for limiting the electrical connector 5. The stopper 8 limits the position of the electrical connector 5 to prevent the electrical connector 5 from tilting or falling and affecting the reliable electrical connection with the positive potential connecting plate 131 and the negative potential connecting plate 141.

[0074] The cleaning machine using the brush head module can control and change the shape of the scraper 3 based on the working state of the cleaning machine, meet different water treatment requirements, and optimize the user experience.

[0075] The working method of the aforementioned cleaning machine is as follows.

[0076] When the cleaning machine is cleaning, it obtains the material information of the ground on which the cleaning machine is located and the moving direction of the cleaning machine. According to the ground material information and the moving direction data, different power supply voltages are provided to the piezoelectric strain gauge 4. The piezoelectric gauge is deformed based on the power supply voltage, so that the scraper 3 is deformed into different working forms. Figure 1 , Figure 3 and Figure 4 As shown, based on different power supply voltages, the scraper blade 3 is deformed into a first working form that is spirally bent relative to the rotation direction to perform floor cleaning; or the scraper blade 3 is deformed into a second working form that extends divergently to perform floor scraping; or the scraper blade 3 is deformed into a third working form that is spirally bent in the opposite direction relative to the rotation direction to drive the centrifugal discharge of water stains.

[0077] Usually, when the cleaning machine is cleaning, it mainly performs cleaning work when it moves forward. At this time, water needs to act on the dirt on the ground, and the purpose of cleaning is achieved based on the friction and brushing of the scraper 3. Especially for some dirt stuck on the floor, based on sufficient water, the cleaning effect can be greatly improved. At this time, it is suitable for the scraper 3 to be deformed into the first working form. Based on the rotation of the brush head module, there is a certain centrifugal effect on the water, and when the scraper 3 is in the first working form, the scraper strip is in an arc shape facing the center of the circle, which will catch the water that is centrifugally divergent outward and retain the water in the middle of the circular disc 2, thereby reducing the dissipation of water, improving the water locking ability, and prolonging the contact time between water and the ground, thereby improving the efficiency of cleaning the ground.

[0078] When the cleaning machine moves backward, the cleaning requirements are usually not high, but the existing cleaning machine will leave long linear water stains on the ground, which need to be scraped off. At this time, it is suitable for the scraper 3 to be deformed into the second working state. The scraper 3 is stretched to a certain extent compared with the first working state, and the water locking ability is reduced, but the scraping length is increased, the scraping area is increased, and the fan power in the cleaning machine is matched, thereby achieving a good scraping effect.

[0079] When the cleaning machine stops, the fan usually stops working, and a water stain will appear under the brush head module because the water is not sucked away in time. At this time, it is suitable for the scraper 3 to be deformed into the third working form. That is, the scraper shape is flipped and changed to an arc facing away from the circle, the water-collecting effect is weakened, and the water in the middle of the disc body 2 is dispersed to the left and right due to centrifugal force, and the water-locking ability is lost. After the center stops discharging water, it continues to rotate, so that the water in the middle of the disc body 2 is centrifugally dispersed, thereby reducing the residual water after shutdown.

[0080] Specifically, when the cleaning machine performs cleaning work:

[0081] When the floor material is conventional and the moving direction of the cleaning machine is forward, the water outlet mechanism is controlled to discharge water to the brush head module area, the brush head module is controlled to rotate at a rotation speed A, and the power supply voltage to the piezoelectric strain gauge 4 is controlled to be V1. The piezoelectric strain gauge 4 is deformed based on the power supply voltage V1, so that the scraper 3 is deformed into a first working form that is spirally bent relative to the rotation direction. The scraper 3 gathers water near the brush head module as the brush head module rotates to perform cleaning.

[0082] When the floor material is conventional and the cleaning machine is moving in the backward direction, the water outlet mechanism is controlled to discharge water to the brush head module area, the brush head module is controlled to rotate at a rotation speed A, and the power supply voltage to the piezoelectric strain gauge 4 is controlled to be V2, V2>V1, and the piezoelectric strain gauge 4 is deformed based on the power supply voltage V2, so that the scraper 3 is deformed into the second working form extending in a divergent shape, and the scraper 3 scrapes off water stains on the ground as the brush head module rotates.

[0083] When the floor material is carpet and the cleaning machine is moving forward or backward, the water outlet mechanism is controlled to stop discharging water to the brush head module area, and the brush head module is controlled to rotate at a speed B, B<A, and the power supply voltage to the piezoelectric strain gauge 4 is controlled to be V1. The piezoelectric strain gauge 4 is deformed based on the power supply voltage V1, so that the scraper 3 is deformed into a first working form that is spirally bent relative to the rotation direction. The scraper 3 gathers water near the brush head module as the brush head module rotates to perform cleaning. In this way, based on the first working form of the scraper 3, the dirt on the carpet can be better gathered under the disc 2, and then better sucked and collected based on the action of the fan.

[0084] After the cleaning machine obtains the shutdown signal, the water outlet mechanism is controlled to stop discharging water to the brush head module area, and the brush head module is controlled to continue rotating at a speed A for a time a; at the same time, the power supply voltage of the piezoelectric strain gauge 4 is controlled to be V3, V3>V2, and the piezoelectric strain gauge 4 is deformed based on the power supply voltage V3, so that the scraper blade 3 is deformed into the third working form that is spirally bent in the opposite direction relative to the rotation direction. The scraper blade 3 drives the water stains to be centrifugally discharged to the periphery of the brush head module as the brush head module rotates. At a time b before the brush head module is controlled to stop rotating, b<a, the power supply voltage of the piezoelectric strain gauge 4 is controlled to be V1, and the piezoelectric strain gauge 4 is deformed based on the power supply voltage V1, so that the scraper blade 3 is reset and deformed into the first working form that is spirally bent relative to the rotation direction.

[0085] The working method of the cleaning machine controls the deformation of the piezoelectric sheet according to the ground material information and the moving direction data, thereby making the scraper strip in different shapes, so as to better meet the different water treatment effects in different working stages of the cleaning work.

[0086] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A brush head module, comprising Axle (1); A disc body (2) connected to the lower end of the shaft (1); The scraper (3) is deformable and comprises at least two scrapers which are arranged on the disc body (2) along the circumferential direction; Features: Also includes The piezoelectric strain gauge (4) extends along the length direction of the scraper (3) and is attached to each scraper (3).

2. The brush head module according to claim 1, characterized in that: A gear (11) is formed on the shaft (1).

3. The brush head module according to claim 1, characterized in that: A through hole (12) for passing water is axially penetrated in the shaft rod (1), and an opening (21) is provided on the disk body (2) corresponding to the through hole (12).

4. The brush head module according to any one of claims 1 to 3, characterized in that: The disk body (2) is embedded with a positive potential conductive sheet (22) and a negative potential conductive sheet (23) for connecting to a power source, and the piezoelectric strain gauge (4) is electrically connected to the positive potential conductive sheet (22) and the negative potential conductive sheet (23).

5. The brush head module according to claim 4, characterized in that: The piezoelectric strain gauge (4) is electrically connected to the positive potential conductive sheet (22) and the negative potential conductive sheet (23) via an electrical connecting sheet (41).

6. The brush head module according to claim 4, characterized in that: The positive potential conductive sheet (22) and the negative potential conductive sheet (23) are both ring-shaped and embedded in the disk body (2) along the up-down direction.

7. The brush head module according to claim 4, characterized in that: The shaft (1) is embedded with an annular positive potential conductor (13) and a negative potential conductor (14); the positive potential conductor (13) is electrically connected to the positive potential conductive sheet (22); the negative potential conductor (14) is electrically connected to the negative potential conductive sheet (23); and the free ends of the positive potential conductor (13) and the negative potential conductor (14) are exposed to form an annular conductive portion (15); An electrical connector (5) electrically connected to a power source is provided next to the shaft (1), and the conductive parts (15) of the positive potential conductor (13) and the negative potential conductor (14) are rotatably contacted and electrically connected to the electrical connector (5).

8. The brush head module according to claim 7, characterized in that: The lower end of the positive potential conductor (13) extends downwards and overlaps with the positive potential conductive sheet (22), and the lower end of the negative potential conductor (14) extends downwards and overlaps with the negative potential conductor (14).

9. The brush head module according to claim 7, characterized in that: A mounting plate (16) is circumferentially protruding from the outer surface of the shaft rod (1); a positive potential connecting plate (131) is radially extended into the mounting plate (16) at the upper end of the positive potential conductor (13); a negative potential connecting plate (141) is radially extended into the mounting plate (16) at the upper end of the negative potential conductor (14); the outer circumferences of the positive potential connecting plate (131) and the negative potential connecting plate (141) extend from the surface of the mounting plate (16) to form an annular conductive portion (15) exposed outside.

10. The brush head module according to any one of claims 1 to 3, characterized in that: The piezoelectric strain gauge (4) is a piezoelectric ceramic sheet.

11. The brush head module according to any one of claims 1 to 3, characterized in that: The scraper blade (3) is centrally symmetrically arranged on the disc body (2), and an angle A is formed between the tangent line of the connection end of the scraper blade (3) and the meridian line of the disc body (2), wherein 0°<A≤90°.

12. A cleaning machine, comprising a main body (6) and a water outlet mechanism, wherein the main body (6) comprises at least one dust suction chamber (61) with an opening (21) facing downward, characterized in that: It also comprises a brush head module as claimed in any one of claims 1 to 11, wherein the brush head module is rotatably arranged in the dust suction chamber (61), and the water outlet mechanism outlets water to the brush head module position.

13. A cleaning machine, comprising a main body (6) and a water outlet mechanism, wherein the main body (6) comprises at least one dust suction chamber (61) with an opening (21) facing downward, and a mounting seat (62) is provided in the dust suction chamber (61), characterized in that: It also includes a brush head module as claimed in any one of claims 7 to 9, wherein the water outlet mechanism outlets water to the brush head module position; The brush head module is rotatably arranged on a mounting seat (62), and an electrical connector (5) connected to a power source is fixedly arranged on the mounting seat (62).

14. The cleaning machine according to claim 12 or 13, characterized in that: A through hole (12) for passing water is axially penetrated in the shaft (1), and an opening (21) is provided on the disk body (2) corresponding to the through hole (12); The water outlet mechanism comprises a water pipe (7) arranged in the through hole (12) facing the opening (21).

15. The cleaning machine according to claim 12 or 13, characterized in that: The lower end of the water pipe (7) is connected to a nozzle (71).

16. The cleaning machine according to claim 12 or 13, characterized in that: The main body (6) is provided with a first detector for detecting the material of the ground.

17. The cleaning machine according to claim 12 or 13, characterized in that: The main body (6) is provided with a second detector for detecting the moving direction.

18. The cleaning machine according to claim 12, characterized in that: A voltage regulating circuit is provided in the main body (6), and the piezoelectric strain gauge (4) in the brush head module is electrically connected to a power source via the voltage regulating circuit.

19. The cleaning machine according to claim 13, characterized in that: A voltage regulating circuit is provided in the main body (6), and the electrical connector (5) is electrically connected to the voltage regulating circuit.

20. The cleaning machine according to claim 19, characterized in that: The voltage regulating circuit is embedded in the mounting seat (62), and an embedding hole is provided on the mounting seat (62) corresponding to each electrical connector (5), and the electrical connector (5) is tightly inserted in the embedding hole and electrically connected to the voltage regulating circuit.

21. The cleaning machine according to claim 20, characterized in that: Limiting members (8) for limiting the position of the electrical connector (5) are provided on both sides of each conductive portion (15).

22. A working method of a cleaning machine, characterized in that: Using a cleaning machine as described in any one of claims 12 to 21; When the cleaning machine is cleaning, it obtains information about the material of the ground on which the cleaning machine is located and the moving direction of the cleaning machine. Different power supply voltages are provided to the piezoelectric strain gauge (4) according to the ground material information and the moving direction data. The piezoelectric gauge is deformed based on the power supply voltage, so that the scraper (3) is deformed into different working forms.

23. The working method of the cleaning machine according to claim 22, characterized in that: Based on different power supply voltages, the scraper (3) is deformed into a first working form that is spirally bent relative to the rotation direction to perform floor cleaning work; or The scraper blade (3) is deformed into a second working form extending in a divergent shape to perform ground scraping work; or The scraper (3) is deformed into a third working form that is spirally bent in the opposite direction relative to the rotation direction, so as to drive the water stains to be discharged centrifugally.

24. The working method of the cleaning machine according to claim 23, characterized in that: When the cleaning machine is cleaning: When the floor material is a conventional floor and the moving direction of the cleaning machine is forward, the water outlet mechanism is controlled to outlet water to the brush head module area, the brush head module is controlled to rotate at a rotation speed A, and the power supply voltage to the piezoelectric strain gauge (4) is controlled to be V1. The piezoelectric strain gauge (4) is deformed based on the power supply voltage V1, so that the scraper (3) is deformed into a first working form that is spirally bent relative to the rotation direction. The scraper (3) gathers water near the brush head module as the brush head module rotates to perform cleaning work; When the obtained floor material is a conventional floor and the moving direction of the cleaning machine is backward, the water outlet mechanism is controlled to outlet water to the brush head module area, the brush head module is controlled to rotate at a speed A, and the power supply voltage to the piezoelectric strain gauge (4) is controlled to be V2, V2>V1, the piezoelectric strain gauge (4) is deformed based on the power supply voltage V2, so that the scraper (3) is deformed into a second working form extending in a divergent shape, and the scraper (3) scrapes away water stains on the floor as the brush head module rotates; When the floor material is a carpet floor and the moving direction of the cleaning machine is forward or backward, the water outlet mechanism is controlled to stop discharging water to the brush head module area, and the brush head module is controlled to rotate at a speed B, B<A, and the power supply voltage to the piezoelectric strain gauge (4) is controlled to be V1. The piezoelectric strain gauge (4) is deformed based on the power supply voltage V1, so that the scraper (3) is deformed into a first working form that is spirally bent relative to the rotation direction. The scraper (3) gathers water near the brush head module as the brush head module rotates to perform cleaning.

25. The working method of the cleaning machine according to claim 23, characterized in that: After the cleaning machine receives the stop signal, the water outlet mechanism is controlled to stop discharging water to the brush head module area, and the brush head module is controlled to continue rotating at a speed A for a time a; At the same time, the power supply voltage of the piezoelectric strain gauge (4) is controlled to be V3, V3>V2. The piezoelectric strain gauge (4) is deformed based on the power supply voltage V3, so that the scraper (3) is deformed into a third working form that is spirally bent in the opposite direction relative to the rotation direction. As the brush head module rotates, the scraper (3) drives the water stains to be centrifugally discharged to the periphery of the brush head module.

26. The working method of the cleaning machine according to claim 25, characterized in that: At a time b before the brush head module stops rotating, b<a, the power supply voltage to the piezoelectric strain gauge (4) is controlled to be V1, and the piezoelectric strain gauge (4) is deformed based on the power supply voltage V1, so that the scraper (3) is reset and deformed to a first working form that is spirally bent relative to the rotation direction.

Images