Patent Description:
With the improvement of living standards, cleaning apparatus with cleaning function is more and more favored by people because of its advantages of convenient cleaning, time-saving and labor-saving.

In related technologies, a cleaning apparatus has been proposed, the cleaning apparatus is equipped with two drivers, one driver is used to drive the cleaning component to rotate for mopping, and the other one is used to drive the cleaning component to lift, in order to lift the cleaning components to avoid bumps or contamination of carpets and other items when the cleaning apparatus passes by an uneven ground, or when the cleaning apparatus passes by a road where carpets and other items are placed. Although the exemplary technology can effectively improve the practicality of the cleaning apparatus, the volume of the cleaning apparatus is increased due to the installation of two drivers, which is not conducive to the cleaning apparatus into a small space for cleaning operation, based on this, there is an urgent need for those skilled in the art to improve the cleaning apparatus.

A Chinese Patent application <CIT> disclosed a lifting and rotating device and a cleaning robot, and the lifting and rotating device comprises a shell, a motor and a lifting and rotating mechanism. The shell is provided with an accommodating cavity; the motor is arranged on the shell; the lifting rotating mechanism is arranged in the containing cavity. The lifting rotating mechanism comprises a rotating shaft and a lifting shaft assembly. The motor drives the rotating shaft to rotate around the shaft, and the lifting shaft assembly is rotationally connected to the shell and can do lifting motion relative to the shell in the axial direction of the lifting shaft assembly. When the motor rotates in the first preset direction, the lifting shaft assembly is independent of the rotating shaft, the rotating shaft drives the cleaning piece to rotate. When the motor rotates in the second preset direction, the motor rotates to drive the lifting shaft assembly to rotate around the shaft, and meanwhile the lifting shaft assembly ascends and descends relative to the shell so as to drive the shaft body and the cleaning piece to ascend and descend. According to the lifting and rotating device, the rotating motion and the lifting motion of the cleaning piece can be completed through one motor, and therefore the lifting and rotating device is more beneficial to miniaturization design of the cleaning robot.

A main object of the present application is to provide a lifting device, so as to solve the technical problem that the volume of the cleaning apparatus having lifting function in the art is larger.

In order to achieve above object, the present application provides a lifting device, which includes: a drive motor, a rotating shaft, a transmission assembly, and a traction member; the rotating shaft includes a mounting portion and a lifting drive portion connected to the mounting portion, and the mounting portion is configured for connecting with the cleaning component, the cleaning component is configured to clean a surface to be cleaned; the transmission assembly is respectively connected to an output end of the drive motor and the rotating shaft, to transfer a power of the drive motor to the rotating shaft; the traction member is threaded to the lifting drive portion; when the rotating shaft is rotated in a first rotation direction driven by the drive motor, the lifting drive portion rotates relative to the traction member and the rotating shaft moves in a direction that approaches the surface to be cleaned; and when the rotating shaft is rotated in a second rotation direction opposite to the first rotation direction driven by the drive motor, the lifting drive portion rotates relative to the traction member and the rotating shaft moves in a direction away from the surface to be cleaned.

In one possible implementation, a peripheral wall of the lifting drive portion is provided with a thread spirally extending along an axis direction of the lifting drive portion, the traction member comprises a traction slider arranged on a side of the lifting drive portion, and at least a part of a structure of the traction slider is slidably arranged in a groove of the thread.

In one possible implementation, an end of the groove of the thread adjacent to the mounting portion is provided with a limiting structure configured for limiting the traction slider from sliding out of the groove of the thread.

In one possible implementation, the lifting device further includes a switch electrically connected with the drive motor, and the switch is configured to be triggered to stop the drive motor; and
a triggering position of the switch is arranged on a moving path of the rotating shaft, and the rotating shaft is able to trigger the switch when the lifting drive portion moves in a direction away from the mounting portion.

In one possible implementation, the rotating shaft includes a triggering portion projecting from the peripheral wall of the lifting drive portion, and the triggering portion and the thread are spaced away from each other; and
the switch is a contact switch, the switch is provided with a button, the button is arranged on a side of the triggering portion facing away from the mounting portion, and triggering portion presses the button when the lifting drive portion moves in a direction away from the mounting portion.

In one possible implementation, the triggering portion is a first gear sleeved on the peripheral wall of the lifting drive portion;
the transmission assembly includes a second gear extending in parallel with the rotating shaft, and the second gear is in a transmission connection with the drive motor, and the second gear is meshed with the first gear.

In one possible implementation, a portion of the traction slider located in the groove of the thread is arranged in a cylindrical shape.

In one possible implementation, the lifting device includes a first elastic member, the first elastic member is arranged at a side of the lifting drive portion facing away from the mounting portion and connected to the lifting drive portion, to provide a drive force to the lifting drive portion when the lifting drive portion moves in a direction that approaches the surface to be cleaned.

In one possible implementation, the lifting device includes a second elastic member, and the second elastic member is arranged at a side of the traction member facing away from the mounting portion and connected to the traction member, to move the traction member along an axis direction of the rotating shaft.

In one possible implementation, an elastic coefficient of the first elastic member is greater than or equal to an elastic coefficient of the second elastic member.

In one possible implementation, a peripheral wall of the lifting drive portion is provided with a thread spirally extending along an axis direction of the lifting drive portion, the traction member comprises a traction slider arranged on a side of the lifting drive portion, and at least a part of a structure of the traction slider is slidably arranged in a groove of the thread; and
the traction member comprises a mounting housing arranged at a side of the lifting drive portion, the mounting housing is provided with a guide groove extending in a same direction of the lifting drive portion, the guide groove is arranged to have an opening at a side of the mounting housing facing the lifting drive portion, the traction slider is slidably mounted at the guide groove, and a part of a structure of the traction slider is inserted into the groove of the thread through the opening, and at least a part of a structure of the second elastic member is arranged in the guide groove and connected with the traction slider.

In one possible implementation, an end of the lifting drive portion facing away from the mounting portion is concavely provided with a mounting groove, at least a part of a structure of the first elastic member is arranged in the mounting groove, and an end of the first elastic member is elastically abutted against a bottom wall of the mounting groove.

The present application further provides a cleaning apparatus, which includes: a machine body, a lifting device, and a cleaning component; and the lifting device being mounted at a side of the machine body. The lifting device includes: a drive motor, a rotating shaft, a transmission assembly, and a traction member; the rotating shaft includes a mounting portion and a lifting drive portion connected to the mounting portion, and the mounting portion is configured for connecting with the cleaning component; the transmission assembly is respectively connected to an output end of the drive motor and the rotating shaft, to transfer a power of the drive motor to the rotating shaft; the traction member is threaded to the lifting drive portion; when the rotating shaft is rotated in a first rotation direction driven by the drive motor, the lifting drive portion rotates relative to the traction member and the rotating shaft moves in a direction that approaches the surface to be cleaned; and when the rotating shaft is rotated in a second rotation direction opposite to the first rotation direction driven by the drive motor, the lifting drive portion rotates relative to the traction member and the rotating shaft moves in a direction away from the surface to be cleanede; and the cleaning component is mounted on the mounting portion.

The present application further provides a cleaning system, which includes a cleaning apparatus, and the cleaning apparatus includes: a machine body, a lifting device, and a cleaning component; and the lifting device being mounted at a side of the machine body. The lifting device includes: a drive motor, a rotating shaft, a transmission assembly, and a traction member; the rotating shaft includes a mounting portion and a lifting drive portion connected to the mounting portion, and the mounting portion is configured for connecting with the cleaning component; the transmission assembly is respectively connected to an output end of the drive motor and the rotating shaft, to transfer a power of the drive motor to the rotating shaft; the traction member is threaded to the lifting drive portion; when the rotating shaft is rotated in a first rotation direction driven by the drive motor, the lifting drive portion rotates relative to the traction member and the rotating shaft moves in a direction that approaches the surface to be cleaned; and when the rotating shaft is rotated in a second rotation direction opposite to the first rotation direction driven by the drive motor, the lifting drive portion rotates relative to the traction member and the rotating shaft moves in a direction away from the surface to be cleaned; and the cleaning component is mounted on the mounting portion.

In the lifting device of the present application, the traction member is arranged to be threaded to the rotating shaft, so that when the rotating shaft rotates along different rotation directions, the unmovable traction member can exert a reaction force to the rotating shaft through the screw thread at the thread connection to drive the rotating shaft to go up or go down. When the traction member goes down to a height that the cleaning component can perform cleaning, the traction member can be locked with the rotating shaft in a threaded manner, or the traction member moves back and forth on the last two circles of the screw thread on the rotating shaft, so as to facilitate the rotating shaft continuous rotation to drive the cleaning component rotating cleaning. Therefore, the design of the present application can realize the rotating cleaning of the cleaning component only by a drive motor to drive the cleaning component, and the lifting technical effect of the cleaning component is also realized, which is conducive to reduce the volume of the lifting device, and to reduce the volume of cleaning apparatus using the lifting device, the reducing the volume of cleaning apparatus is conducive to the cleaning of narrow space and reduce the manufacturing cost of cleaning apparatus.

In order to explain the embodiments of the present application more clearly, a brief introduction regarding the accompanying drawings that need to be used for describing the embodiments of the present application or the prior art is given below; it is obvious that the accompanying drawings described as follows are only some embodiments of the present application, for those skilled in the art, other drawings can also be obtained according to the current drawings on the premise of paying no creative labor.

In the drawings, the reference signs are listed:
<NUM>-lifting device; <NUM>-drive motor; <NUM>-rotating shaft; <NUM>-mounting portion; <NUM>-lifting drive portion; <NUM>-limiting structure; <NUM>-mounting groove; <NUM>-thread; <NUM>-groove; <NUM>-screw thread; <NUM>-triggering portion; <NUM>-first gear; <NUM>-transmission assembly; <NUM>-second gear; <NUM>-traction member; <NUM>-traction slider; <NUM>-mounting housing; <NUM>-guide groove; <NUM>-switch; <NUM>-button; <NUM>-first elastic member; <NUM>-second elastic member; <NUM>-machine body; <NUM>-cleaning component.

The realization of the object, functional features and advantages of the present application will be further described in conjunction with embodiments with reference to the accompanying drawings.

The following is a clear and complete description of the technical solution in the embodiment of the present application in combination with the drawings attached to the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, but not the all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

It should be noted that in case that the embodiments of the present application involve directional indications (such as up, down, left, right, front, rear. ), , then the directional indication is only used to explain the relative position relationship and motion among components in a specific attitude (as shown in the attached figure). In case that the specific attitude changes, the directional indication will change accordingly.

In addition, in case that an embodiment of the present application contains a description referring to "first", "second", etc., the description of "first", "second", etc., shall be used only for the purpose of description and shall not be understood to indicate or imply its relative importance or to indicate implicitly the quantity of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between embodiments may be combined with each other, but they must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or impossible to be realized, it shall be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the present application.

The present application provides a cleaning apparatus. In some embodiments, the cleaning apparatus is a sweeping robot, a floor mopping robot, a sweeping and mopping robot or a window cleaning robot, etc., which is not limited herein.

As shown in <FIG> and <FIG>, in the embodiment, the cleaning apparatus includes a machine body <NUM>, a lifting device <NUM> and a cleaning component <NUM>. When the cleaning apparatus is a sweeping robot, the cleaning component <NUM> is a floor brush suitable for the sweeping robot; when the cleaning apparatus is a mopping robot, the cleaning component <NUM> is a mop suitable for the mopping robot, and when the cleaning apparatus is a window cleaning robot, the cleaning component 300is a cloth or paper cleaning supplies suitable for the window cleaning robot.

The lifting device <NUM> is mounted on one side of the machine body <NUM>, and the cleaning component <NUM> is mounted on the mounting portion <NUM> of the lifting device <NUM>. The lifting device <NUM> is used to drive the cleaning component <NUM> to do the lifting movement. It should be noted that when the cleaning apparatus is the sweeping robot or the mopping robot, the lifting device <NUM> is generally mounted at the bottom of the machine body <NUM> to drive the cleaning component <NUM> to move in the height direction of the machine body <NUM>. When the cleaning apparatus is the window cleaning robot, the lifting device <NUM> is mounted in a front side of the machine body <NUM> to drive the cleaning component <NUM> to move in the front and back direction of the machine body <NUM>. When the cleaning apparatus cleans some objects (such as but not limited to beds, sofas, etc.) which are set on the ground at intervals and need to be cleaned at the bottom surface, the lifting device <NUM> can also be arranged on the top of the machine body <NUM>, which is not limited herein.

In some usage scenarios, when the machine body <NUM> detects that objects such as carpets and other items are placed in a moving path of the machine body <NUM> that may interfere with the movement of the cleaning component <NUM>, in order to prevent stains carried by cleaning component <NUM> from contaminating these objects and ensure the smooth movement of machine body <NUM>, the lifting device <NUM> can drive the cleaning component <NUM> to move in the direction adjacent to the machine body <NUM>, so that the cleaning component <NUM> is separated from these objects.

In other usage scenarios, when the cleaning device completes the cleaning task, the lifting device <NUM> drives the cleaning device <NUM> to move closer to the machine body <NUM> to keep the cleaning device <NUM> away from the ground in order to prevent the stain on the cleaning device <NUM> from contaminating the cleaned ground.

The cleaning apparatus with the lifting function of the cleaning component <NUM> on the market needs to be provided with at least two drivers, one driver is used to drive the cleaning component <NUM> to rotate for cleaning, and the other one is used to drive the cleaning component to finish the lifting movement, the volume of the cleaning apparatus is increased due to the installation of two drivers, which is not conducive to the cleaning apparatus into a small space for cleaning operation, and the use of two drivers will lead to high manufacturing costs of cleaning apparatus, which is not conducive to improving the competitiveness of cleaning apparatus among similar products.

In order to solve the above problems, the present application provides a lifting device <NUM>.

In embodiments of the present application, as shown in <FIG>, the lifting device <NUM> includes: a drive motor <NUM>, a rotating shaft <NUM>, a transmission assembly <NUM> and a traction member <NUM>. In particular, in some embodiments, the lifting device <NUM> further includes a housing, and the housing is used as a carrier for the drive motor <NUM>, the rotating shaft <NUM>, the transmission assembly <NUM>, the traction member <NUM> and the switch <NUM> mentioned below. The housing can be mounted on the machine body <NUM>, the structural shape of the housing can be adjusted according to the actual use requirements, which is not limited herein. In other embodiments, the drive motor <NUM>, the rotating shaft <NUM>, the transmission assembly <NUM>, the traction assembly <NUM>, and the switch <NUM> mentioned below are mounted directly on the machine body <NUM>, which is not limited herein.

As shown in <FIG>, <FIG> and <FIG>, the rotating shaft <NUM> includes a mounting portion <NUM> and a lifting drive portion <NUM> that are connected with each other, and the mounting portion <NUM> is used to be connected with the cleaning component <NUM>. In particular, in order to facilitate the maintenance and replacement of the cleaning component <NUM>, the mounting portion <NUM> is detachably connected to the cleaning component <NUM>. During the specific implementation, in some embodiments, as can be seen in <FIG>, an insertion slot (not identified in <FIG>) is arranged on the cleaning component <NUM>, and the end of mounting portion <NUM> is detachably inserted into the insertion slot. In other embodiments, a first magnetic suction member is provided on one of the mounting portion <NUM> and the cleaning component <NUM>, and a second magnetic suction member magnetically matched with the first magnetic suction member is provided on the other one of the mounting portion <NUM> and the cleaning component <NUM>. The mounting portion <NUM> is assembled with the cleaning component <NUM> through a magnetic connection between the first magnetic suction member and the second magnetic suction member. In yet embodiment, a mechanical claw is arranged at an end of the mounting portion <NUM> for grabbing the cleaning component <NUM>, so as to grab the cleaning component <NUM> and drive the cleaning component <NUM> to move for cleaning. The structure of assembling between the mounting portion <NUM> and the cleaning component <NUM> is various, which is not limited herein.

The transmission assembly <NUM> is respectively connected with the output end of the drive motor <NUM> and the rotating shaft <NUM> to transfer the power of the drive motor <NUM> to the rotating shaft <NUM>. In the specific implementation, the transmission assembly <NUM> is a gear, a rack or a belt and other parts for realizing transmission between the output end of the drive motor <NUM> and the rotating shaft <NUM>. The transmission structure is various, it is not enumerated here, the components that can transfer the rotation of the drive motor <NUM> to the rotating shaft <NUM> to rotate the rotation shaft <NUM> are satisfied, which is not limited herein.

The traction member <NUM> is threaded to the lifting drive portion <NUM>.

In the specific implementation, in some embodiments, the peripheral wall of the lifting drive portion <NUM> is provided with an external thread extending spirally along its own axis direction (the external thread can be thread <NUM> as shown in <FIG>), the traction member <NUM> includes a cylinder (not shown) sleeved on the lifting drive portion <NUM>, and the inner peripheral wall of the cylinder is provided with an internal thread matching with the external thread. The cylinder is threaded to the lifting drive portion <NUM> through the match between the internal thread and the external thread.

In other embodiments, a threaded hole (not shown) is provided at one end of the lifting drive portion <NUM> away from the mounting portion <NUM>, and the traction member <NUM> includes a threaded post matching with the threaded hole (not shown), the threaded post is threaded to the threaded hole.

In yet embodiment, as shown in <FIG>, the peripheral wall of the lifting drive portion <NUM> is provided with thread <NUM> extending spirally along its own axis direction, and the traction member <NUM> includes a traction slider <NUM> arranged on one side of the lifting drive portion <NUM>, and at a part of the structure of the traction slider <NUM> is slideably arranged in the groove <NUM> of thread <NUM>. It can be understood that using the method that the traction slider <NUM> being matched with the thread <NUM> can simplify the structure of the traction member <NUM> when comparing with the above two embodiments, such method reduces the material cost of the traction member <NUM>, while conducive to reduce the volume of the lifting device <NUM>, which is conducive to the cleaning apparatus into the narrow space for cleaning operation.

When the rotating shaft <NUM> is driven by the drive motor <NUM> along the first rotation direction, the lifting drive portion <NUM> rotates relative to the traction member <NUM>, and the rotating shaft <NUM> moves in a direction that approaches the surface to be cleaned, such as the ground, glass surface, etc; When the rotating shaft <NUM> is driven by the drive motor <NUM> along the second rotation direction opposite to the first rotation direction, the lifting drive portion <NUM> rotates relative to the traction member <NUM> and the rotating shaft <NUM> moves along the direction away from the surface to be cleaned.

Take the lifting device <NUM> mounted at the bottom of machine body <NUM> as an example, as shown in <FIG>, <FIG>, the traction member <NUM> does not move, when the rotating shaft <NUM> rotates along the first rotation direction, that is, when the rotating shaft <NUM> rotates counterclockwise around its own axis shown in <FIG>, the rotating shaft <NUM> does down under the reaction force of traction member <NUM>. In the embodiment where the traction member <NUM> includes a cylinder or a threaded post, when the rotating shaft <NUM> is went down to the cleaning component <NUM> being in contact with the ground, the rotating shaft <NUM> can be locked with the cylinder or threaded post in a threaded method, and when the cleaning component <NUM> is rotated to mop the ground, the rotating shaft <NUM> can be rotated with the cylinder or threaded post. In the embodiment where the traction member <NUM> includes a traction slider <NUM>, when the rotating shaft <NUM> is went down to the cleaning component <NUM> being in contact with the ground and continuously rotating, the traction slider <NUM> can move back and forth on the last two turns of the screw thread <NUM> of the thread <NUM>.

When the rotating shaft <NUM> rotates in the second direction of rotation, that is, when rotating shaft <NUM> rotates clockwise about its own axis shown in <FIG>, the rotating shaft <NUM> goes up under the reaction force of traction member <NUM>. In the above embodiment where the traction member <NUM> includes a cylinder or a threaded post, when the rotating shaft <NUM> goes up to the cleaning component <NUM> being in contact with the ground, at this time, the drive motor <NUM> can be stopped to prevent the cylinder or thread post from disconnecting with the rotating shaft <NUM>. Similarly, in the above embodiment where traction member <NUM> includes the traction slider <NUM>, the drive motor <NUM> can also be stopped when the rotating shaft <NUM> is went up to the cleaning component <NUM> being in contact with the ground to prevent the traction slider <NUM> from slipping out of the end of thread <NUM> adjacent to the mounting portion <NUM>.

It can be understood that in the lifting device <NUM> of the present application, the traction member <NUM> is arranged to be threaded to the rotating shaft <NUM>, so that when the rotating shaft <NUM> rotates along different rotation directions, the unmovable traction member <NUM> can exert a reaction force to the rotating shaft <NUM> through the screw thread at the thread connection to drive the rotating shaft <NUM> to go up or go down. When the traction member <NUM> goes down to a height that the cleaning component <NUM> can perform cleaning, the traction member <NUM> can be locked with the rotating shaft in a threaded manner, or the traction member <NUM> moves back and forth on the last two circles of the screw thread on the rotating shaft <NUM>, so as to facilitate the rotating shaft <NUM> continuous rotation to drive the cleaning component <NUM> rotating cleaning. Therefore, the design of the present application can realize the rotating cleaning of the cleaning component <NUM> only by a drive motor to drive the cleaning component <NUM>, and the lifting technical effect of the cleaning component <NUM> is also realized, which is conducive to reduce the volume of the lifting device <NUM>, and to reduce the volume of cleaning apparatus using the lifting device <NUM>, the reducing the volume of cleaning apparatus is conducive to the cleaning of narrow space and reduce the manufacturing cost of cleaning apparatus.

In order to reduce the friction between the traction slider <NUM> and a groove wall of the groove <NUM> and improve the smoothness of sliding of the traction slider <NUM> in the groove <NUM>, in some embodiments, the part of the traction slider <NUM> located in the groove <NUM> of thread <NUM> is arranged in a cylindrical shape.

Based on the above embodiment where the traction member <NUM> includes the traction slider <NUM>, an end of groove <NUM> of thread <NUM> adjacent to the mounting portion <NUM> is further provided with a limiting structure <NUM>, and the limiting structure <NUM> is used to limit the traction slider <NUM> from sliding out of the groove <NUM> of the thread <NUM>. When the rotating shaft <NUM> rotates along the second rotation direction, the traction slider <NUM> and the limiting structure <NUM> will approach each other as the lifting drive portion <NUM> moves away from the mounting portion <NUM>, until the traction slider <NUM> is abutted against the limiting structure <NUM>. When the traction slider <NUM> abuts against the limiting structure <NUM>, the cleaning component <NUM> is moved to a position separated from the ground. After that, in some embodiments, the rotating shaft <NUM> can be stopped to rotate by stopping the drive motor <NUM> to save energy. In other embodiments, the drive motor <NUM> can not be stopped, and the traction slider <NUM> is movably mounted on the housing, so that the traction slider <NUM> can rotate with rotating shaft <NUM> under the push of the limiting structure <NUM>. It can be understood that the movement of traction slider <NUM> is restricted by the limiting structure <NUM>, which can effectively prevent the interruption of the fit between the traction slider <NUM> and the thread <NUM>, and it is conducive to ensuring the reliability of product operation.

In the specific implementation, the limiting structure <NUM> is a limiting wall, a limiting convex edge or a limiting bump, and other structures arranged in groove <NUM>, and which is not limited herein.

In some embodiments, the lifting device <NUM> further includes a switch <NUM>, the switch <NUM> is electrically connected to the drive motor <NUM>, and the switch <NUM> stops the drive motor <NUM> when triggered. The trigger position of the switch <NUM> is arranged on the moving path of the rotating shaft <NUM>. When lifting drive portion <NUM> moves away from mounting portion <NUM>, the rotating shaft <NUM> can trigger the switch <NUM>. In the embodiment, when the rotating shaft <NUM> rotates along the second rotation direction, the rotating shaft <NUM> will drive the cleaning component <NUM> away from the surface to be cleaned (such as the ground, glass surface, etc.), when the cleaning component <NUM> moves to a certain height from the surface to be cleaned, the switch <NUM> can be triggered by the rotating shaft <NUM>, and then stop the drive motor <NUM> to save energy.

In the embodiment where a limiting structure <NUM> is provided in the groove <NUM> of the thread <NUM>, as well as the lifting device <NUM> includes the switch <NUM>, the switch <NUM> can be triggered before the traction slider <NUM> abuts against the limiting structure <NUM>, when the traction slider <NUM> is just abutted against the limiting structure <NUM>.

In the specific implementation, in some embodiments, the switch <NUM> can be contact switch <NUM>, such as but not limited to a micro switch <NUM>, etc., the rotating shaft <NUM> includes a triggering portion <NUM> protruding from the peripheral wall of the lifting drive portion <NUM>, the triggering portion <NUM> and thread <NUM> are spaced from each other; the switch <NUM> is provided with a button <NUM>, the button <NUM> is arranged on the side of the triggering portion <NUM> facing away from the mounting portion <NUM>. When the lifting drive portion <NUM> moves away from mounting portion <NUM>, the triggering portion <NUM> can press the button <NUM>. It can be understood that the the mechanical method to trigger the switch <NUM> has the advantages of easy implementation and simple control logic. In other embodiments, the switch <NUM> can also be an induction switch <NUM>, such as but not limited to an infrared induction switch <NUM>, etc., which is not limited herein.

As shown in <FIG> and <FIG>, the triggering portion <NUM> is a first gear <NUM> sleeved on the peripheral wall of the lifting drive portion <NUM>; the transmission assembly <NUM> includes a second gear <NUM> extending in parallel with the rotating shaft <NUM>, the second gear <NUM> is connected to the drive motor <NUM> in a transmission manner, and the second gear <NUM> is meshed with the first gear <NUM>. It can be understood that the gear meshing transmission manner has the advantages of simple implementation and high transmission reliability. At the same time, the first gear <NUM> round dual-purpose, that is, the first gear <NUM> on the one hand is used for meshing transmission with the transmission assembly <NUM>, on the other hand, the first gear <NUM> is used to trigger the switch <NUM> with the movement of the lifting drive portion <NUM>, which is conducive to simplifying the structure of the rotating shaft <NUM> and facilitate the miniaturization of product design.

It is worth noting that, in addition to stopping the drive motor <NUM> with the switch <NUM>, in some embodiment, a Hall element is arranged at the output end of drive motor <NUM> to calculate the number of turns of rotating shaft <NUM> along the second rotation direction, so as to timely stop the drive motor <NUM> with a preset procedure when the traction pulley is about to separate away from the thread <NUM>.

The lifting device <NUM> includes a first elastic member <NUM>, the first elastic member <NUM> is arranged on one side of the lifting drive portion <NUM> facing away from the mounting portion <NUM> and connected with the lifting drive portion <NUM> to provide a drive force to the lifting drive portion <NUM> when the lifting drive portion <NUM> moves in the direction that the rotating shaft <NUM> approaches the surface to be cleaned. In the specific implementation, the first elastic member <NUM> can be a spring, a rubber band and other elastic members. It can be understood that, the mounting portion <NUM> can be quickly adjacent to the surface to be cleaned under the driving of the first elastic member <NUM>, which is conducive to shorten the time spent for the cleaning component <NUM> to go down to the surface to be cleaned.

During the mounting of the first elastic member <NUM>, in some embodiments, an end of the lifting drive portion <NUM> away from the mounting portion <NUM> is concavely provided with a mounting groove <NUM>, at least a part of the structure of the first elastic member <NUM> is arranged in the mounting groove <NUM>, and an end of the first elastic member <NUM> is elastically abutted against the bottom wall of the mounting groove <NUM>. In particular, the end of first elastic member <NUM> facing away from the bottom wall of the mounting groove <NUM> is connected to the housing, or is connected to the machine body <NUM>, which is not limited herein. It can be understood that the cavity in the mounting groove <NUM> can play a certain constraint role in the expansion and deformation of the first elastic member <NUM>, that is, the first elastic member <NUM> can only deform in a depth direction of the mounting groove <NUM> under the constraint of the mounting groove <NUM>, which is conducive to ensuring the reliability of the first elastic member <NUM>. In other embodiments, the end of the lifting drive portion <NUM> is not provided with the mounting groove <NUM>, and the end of the first elastic member <NUM> is directly fixed on the end of the lifting drive portion <NUM>, which is not limited herein.

Since the surface to be cleaned will inevitably have a bumpy situation, when the cleaning component <NUM> moves from the low-lying place to a flat or steep place, or from the flat or steep place move to the low-lying place, the cleaning component <NUM> will inevitably shake, and then the rotating shaft <NUM> and the traction slider <NUM> are shaken in the housing, so that the rotating shaft <NUM> and the traction slider <NUM> are easy to rigid bump with other components (such as the inner wall of the housing). In order to reduce the adverse influence brought by shaking, in some embodiments, the lifting device <NUM> includes a second elastic member <NUM>, the second elastic member <NUM> is arranged on a side of the traction member <NUM> facing away from the mounting portion <NUM> and is connected with the traction member <NUM>, so that the traction member <NUM> can be moved in the axis direction of rotating shaft <NUM>. Therefore, when the cleaning component <NUM> is shaking, the movement amplitude of the rotating shaft <NUM> in a direction away from the surface to be cleaned can be effectively reduced under the elastic buffering of the first elastic member <NUM>. Similarly, the movement amplitude of the the traction slider <NUM> in a direction away from the surface to be cleaned can be effectively reduced under the elastic buffering of the second elastic member <NUM>. Therefore, the bumping between the rotating shaft <NUM>, the traction slider <NUM> and other components, and the noise caused by the lifting device <NUM> in the process of shaking is reduced.

Since the traction slider <NUM> will limit the movement of the rotating shaft <NUM> away from the direction of the surface to be cleaned, in case that when the shaking strength has been able to promote the compression deformation of the first elastic member <NUM>, but can not promote the compression deformation of the second elastic member <NUM>, at this time, the rotating shaft <NUM> is unable to move under the restriction of the traction slider <NUM>, thus causing the cleaning component <NUM> can not pass through the surface to be cleaned with a larger slope. In order to avoid the above situation, in the embodiment, the elastic coefficient of the first elastic member <NUM> is greater than or equal to that of the second elastic member <NUM>. In other embodiments, the elastic coefficient of the first elastic element <NUM> can also be greater than that of the second elastic element <NUM>, which is not limited herein.

In order to ensure that the second elastic member <NUM> can expand and deform in the moving direction of the rotating shaft <NUM>, in the embodiment, the traction member <NUM> includes a mounting housing <NUM> arranged on one side of the lifting drive portion <NUM>. The mounting housing <NUM> is formed with a guide groove <NUM> extending in the same direction as the lifting drive portion <NUM>, and the guide groove <NUM> is provided with an opening arranged on a side of the mounting housing <NUM> facing the lifting drive portion <NUM>, the traction slider <NUM> is slidably mounted in the guide groove <NUM>, and at least a part of the structure of the traction slider <NUM> is inserted into the groove <NUM> of the thread <NUM> through the opening, and at least a part of the structure of the second elastic member <NUM> is arranged in the guide groove <NUM> and is connected with the traction slider <NUM>.

The present application further provides a cleaning system, which includes the cleaning apparatus, and the specific structure of the cleaning apparatus can be referred to the above embodiments. Since the cleaning system adopts all the technical solutions of the above embodiments, the cleaning system at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated herein.

Claim 1:
A lifting device (<NUM>), applied to a cleaning apparatus and configured to drive a cleaning component (<NUM>) of the cleaning apparatus to do lifting movement, wherein the lifting device (<NUM>) comprises:
a drive motor (<NUM>);
a rotating shaft (<NUM>), comprising a mounting portion (<NUM>) and a lifting drive portion (<NUM>) connected to the mounting portion, and the mounting portion being configured for connecting with the cleaning component (<NUM>), the cleaning component (<NUM>) is configured to clean a surface to be cleaned;
a transmission assembly (<NUM>), respectively connected to an output end of the drive motor (<NUM>) and the rotating shaft (<NUM>), to transfer a power of the drive motor (<NUM>) to the rotating shaft (<NUM>); characterized in that the lifting device (<NUM>) comprises:
a traction member (<NUM>), threaded to the lifting drive portion (<NUM>);
wherein when the rotating shaft (<NUM>) is rotated in a first rotation direction driven by the drive motor (<NUM>), the lifting drive portion (<NUM>) rotates relative to the traction member (<NUM>) and the rotating shaft (<NUM>) moves in a direction that approaches the surface to be cleaned; and
when the rotating shaft (<NUM>) is rotated in a second rotation direction opposite to the first rotation direction driven by the drive motor (<NUM>), the lifting drive portion (<NUM>) rotates relative to the traction member (<NUM>) and the rotating shaft (<NUM>) moves in a direction away from the surface to be cleaned.