Cleaning equipment, telescopic assembly and gearbox

Abstract

The invention discloses cleaning equipment, a telescopic assembly and a gearbox, the cleaning equipment at least comprises a machine body, the telescopic assembly and a cleaning assembly, and the telescopic assembly comprises a power source, a first bevel gear and a second bevel gear; the power source is mounted on the machine body and is in transmission connection with the first bevel gear; the second bevel gear is meshed with the first bevel gear and is connected with the cleaning assembly through an output shaft; when the first bevel gear rotates in the first rotating direction, the first bevel gear generates first axial force on the second bevel gear so as to drive the second bevel gear to drive the cleaning assembly to move towards the target face. When the first bevel gear rotates in the second rotating direction, the first bevel gear generates second axial force on the second bevel gear so as to drive the second bevel gear to drive the cleaning assembly to move in the direction away from the target face. According to the technical scheme, lifting of the cleaning assembly can be automatically controlled so as to adapt to different cleaning scenes.

Description

Technical Field

[0001] The present application relates to the field of cleaning technology, and in particular to a cleaning device, a telescopic assembly and a gear box. Background Art

[0002] As people's living standards improve, more and more families are beginning to use various cleaning equipment, such as sweeping robots, automatic floor scrubbers and other equipment to reduce labor intensity and improve the quality of life.

[0003] Take sweeping robots as an example. Currently, more and more sweeping robots on the market have mopping functions. However, due to the complex floor environment of the home, for example, some areas are covered with carpets and some areas are covered with floors. Obviously, if the mopping function is used in areas covered with carpets, the friction between the rag and the carpet will make the carpet dirtier. For some scenarios where the mopping function is not required, existing products usually rely on users to manually disassemble and assemble the rag tray, which is not only cumbersome to operate, but also dirty the user's hands, greatly affecting the user experience. Summary of the invention

[0004] The purpose of the present application is to provide a cleaning device, a telescopic assembly and a gear box, which can automatically control the lifting and lowering of the cleaning assembly.

[0005] To achieve the above-mentioned objectives, the present application provides a cleaning device on the one hand, which includes at least a body, a telescopic component and a cleaning component, wherein the telescopic component includes a power source, a first bevel gear and a second bevel gear; the power source is installed on the body, and the power source is connected to the first bevel gear in a transmission manner to drive the first bevel gear to rotate along a first rotation direction, or along a second rotation direction opposite to the first rotation direction; the second bevel gear is meshed with the first bevel gear, and the second bevel gear is connected to the cleaning component through an output shaft, and the cleaning component is used to clean a target surface; when the first bevel gear rotates along the first rotation direction, the first bevel gear generates a first axial force on the second bevel gear to drive the second bevel gear to drive the cleaning component to move toward the target surface; when the first bevel gear rotates along the second rotation direction, the first bevel gear generates a second axial force on the second bevel gear to drive the second bevel gear to drive the cleaning component to move away from the target surface.

[0006] To achieve the above-mentioned purpose, the present application further provides a telescopic assembly, which comprises at least a base, a first bevel gear and a second bevel gear, wherein the base has a first through hole; the first bevel gear is rotatably connected to the base, and the first bevel gear is used for transmission connection with a power source, so that the power source drives the first bevel gear to rotate along a first rotation direction or along a second rotation direction; the second bevel gear is meshed with the first bevel gear, and the second bevel gear is coaxially connected with an output shaft, the output shaft passes through the first through hole, and the first through hole limits the radial movement of the output shaft.

[0007] To achieve the above-mentioned purpose, the present application also provides a gearbox on the other hand, which includes at least a shell, a first helical gear and a second helical gear; the shell has a accommodating chamber and a first through hole, the first through hole is connected to the accommodating chamber; the first helical gear is located in the accommodating chamber and is rotatably connected to the shell, and the first helical gear is used for transmission connection with a power source so that the power source drives the first helical gear to rotate along a first rotation direction or along a second rotation direction; the second helical gear is located in the accommodating chamber and meshes with the first helical gear, the second helical gear is coaxially fixedly connected with an output shaft, the output shaft extends through the first through hole to the outside of the shell, and the first through hole limits the radial movement of the output shaft.

[0008] It can be seen that the technical solution provided by the present application is that the power source is connected to the first bevel gear in a transmission manner, and the power source can drive the first bevel gear to rotate in a first rotation direction or in a second rotation direction opposite to the first rotation direction, and the first bevel gear is meshed with the second bevel gear. The present application utilizes the axial force generated by the first bevel gear and the second bevel gear during the meshing process, and the direction of the axial force will change with the different rotation directions of the first bevel gear, and connects the cleaning component to the second bevel gear through the output shaft, so that when the power source drives the first bevel gear to rotate in the first rotation direction, the first bevel gear generates a first axial force on the second bevel gear, and the first axial force can drive the second bevel gear to drive the cleaning component to move toward the target surface and contact the target surface. When the power source drives the first bevel gear to rotate in the second rotation direction, the first bevel gear generates a second axial force on the second bevel gear, and the second axial force can drive the second bevel gear to drive the cleaning component to move in a direction away from the target surface, thereby achieving the purpose of automatically controlling the lifting of the cleaning component. In the technical solution of the present application, by adjusting the rotation direction of the power source, the power source can drive the cleaning component to extend and contact the target surface to clean the target surface, and can also drive the cleaning component to retract to avoid unclean areas, thereby improving the adaptability of the cleaning equipment in different scenarios.

[0009] At the same time, the first bevel gear and the second bevel gear can also realize the power transmission, speed regulation and torque regulation functions of the power source to replace the existing gear box connected to the output end of the power source. In other words, the technical solution of the present application integrates the telescopic component connected to the cleaning component and the gear box connected to the output end of the power source into one, thereby reducing the weight of the cleaning equipment. Taking the sweeping robot as an example, this solution greatly reduces the space occupied in the vertical direction of the sweeping robot, so that the height of the sweeping robot can be made lower, which is suitable for cleaning low areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a schematic structural diagram of a cleaning device in one embodiment provided in the present application;

[0012] Figure 2 is a schematic diagram of a half-section structure of a telescopic assembly in an embodiment provided in the present application;

[0013] Figure 3 is a schematic structural diagram of a second helical gear connected to an output shaft in an embodiment provided by the present application;

[0014] Figure 4 is a schematic structural diagram of a cleaning device in another embodiment provided by the present application;

[0015] Figure 5 is a schematic diagram of a half-section structure of a telescopic assembly in another embodiment provided by the present application;

[0016] Figure 6 yes Figure 5 A magnified schematic diagram of part A;

[0017] Figure 7 is an axonometric schematic diagram of a telescopic assembly in one embodiment provided in the present application;

[0018] Figure 8 is an axonometric schematic diagram of a second duplex gear in an embodiment provided by the present application;

[0019] Fig. 9 It is a schematic diagram of a half-section structure of a telescopic component in another embodiment provided in the present application. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Terms such as "upper", "above", "lower", "below", "first end", "second end", "one end", "the other end" used in the present application to represent spatial relative positions are used to describe the relationship between a unit or feature as shown in the accompanying drawings relative to another unit or feature for the purpose of convenience of explanation. Terms of spatial relative position may be intended to include different orientations of the device in use or work other than the orientation shown in the figure. For example, if the device in the figure is turned over, the unit described as being "below" or "below" other units or features will be located "above" other units or features. Therefore, the exemplary term "below" can encompass both the above and below orientations. The device can be oriented in other ways (rotated 90 degrees or other orientations), and the spatially related descriptors used herein are interpreted accordingly.

[0021] In addition, the terms "installed", "set", "provided with", "connected", "slidingly connected", "fixed", and "sleeved" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] As people's living standards improve, more and more families are beginning to use various cleaning equipment, such as sweeping robots, automatic floor scrubbers and other equipment to reduce labor intensity and improve the quality of life. Taking sweeping robots as an example, more and more sweeping robots on the market have mopping functions. However, due to the complex household floor environment, the mopping function is not necessary in some environments. For example, the floors in some areas are carpeted and the floors in some areas are floored. Obviously, if the mopping function is used in areas with carpets, the friction between the rag and the carpet will make the carpet dirtier. For another example, when the sweeping robot needs to return to the base station for charging, the sweeping robot needs to climb the recharging ramp, and the friction between the rag and the ramp will increase the climbing resistance of the sweeping robot.

[0023] For the above-mentioned scenario where the mopping function is not needed, existing products usually rely on users to manually remove the rag plate. When the mopping function is needed again, the user manually installs the rag plate. This operation method is not only cumbersome, but also dirty the user's hands, greatly affecting the user experience.

[0024] In addition, although there are some telescopic devices for controlling the rag plate in the prior art, most of the existing telescopic devices are arranged outside the gear box, that is, an additional 1 to 2-level structure needs to be added between the output end of the gear box and the rag plate to realize the telescopic function. Obviously, this method will increase the vertical height of the cleaning equipment, making the size of the cleaning equipment larger and not suitable for cleaning low areas. Moreover, the telescopic device is usually complex in structure and heavy in weight, which cannot achieve the pursuit of miniaturization and lightweight in the field of household products.

[0025] Therefore, how to improve the structure of the cleaning device, telescopic assembly and gear box so that it can automatically control the lifting position of the rag plate, and correspondingly reduce the size of the cleaning device and simplify the structure of the cleaning device has become an urgent issue to be solved in this field.

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in this application are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0027] Please also see Figure 1 to Figure 2 In an achievable implementation, the present application provides a cleaning device, which may be a self-moving device that can move autonomously and clean a target surface during movement, such as a sweeping robot and a floor scrubber. Of course, the cleaning device may also be a handheld device that is operated by a user to push the cleaning device to move and clean the target surface during movement, which is not limited here. The target surface may be the ground, a wall, or the surface of an object to be cleaned.

[0028] In this embodiment, the cleaning device may include a body 100, a telescopic assembly 200 and a cleaning assembly 300, wherein the body 100 serves as a basic carrier of the cleaning device, and supports and protects other components of the cleaning device. The cleaning assembly 300 is connected to the body 100 through the telescopic assembly 200, so that the telescopic assembly 200 controls the cleaning assembly 300 to extend away from the body 100, or retract toward the body 100, and the cleaning assembly 300 is used to clean the target surface. The cleaning assembly 300 may be a rag plate, a cleaning brush, etc., which is not specifically limited here.

[0029] Specifically, the telescopic assembly 200 may include a power source 210, a first bevel gear 220, and a second bevel gear 230. The power source 210 is mounted on the body 100, and the first bevel gear 220 is in transmission connection with the power source 210. There is no relative movement between the power source 210, the first bevel gear 220, and the body 100. The power source 210 is used to output power and transmit power to the first bevel gear 220 to drive the first bevel gear 220 to rotate along a first rotation direction, or along a second rotation direction opposite to the first rotation direction. It should be noted that the first rotation direction may be a clockwise rotation direction, and the corresponding second rotation direction is a counterclockwise rotation direction; the first rotation direction may also be a counterclockwise rotation direction, and the corresponding second rotation direction is a clockwise rotation direction, which is not limited in this application. In practical applications, the power source 210 may be an electric motor, the output end of which is in transmission connection with the first bevel gear 220, and the electric motor may rotate along the first rotation direction or the second rotation direction, thereby driving the first bevel gear 220 to rotate along the first rotation direction or the second rotation direction.

[0030] The second bevel gear 230 is configured to be able to reciprocate along the axial direction of the second bevel gear 230 and rotate around the axis of the second bevel gear 230, the second bevel gear 230 is meshed with the first bevel gear 220, and the second bevel gear 230 is connected to the cleaning assembly 300 through the output shaft 240. In this way, when the power source 210 drives the first bevel gear 220 to rotate, the first bevel gear 220 can drive the second bevel gear 230 to rotate.

[0031] Furthermore, since the tooth surfaces of the first helical gear 220 and the second helical gear 230 meshing are oblique, that is, there is a pressure angle between the tooth surface of the second helical gear 230 and its axis, the pressure angle can cause the torque transmitted by the first helical gear 220 to the second helical gear 230 to generate an axial force component, that is, an axial force, and the direction of the axial force will change with the different rotation directions of the first helical gear 220. The present application also utilizes the characteristics that the axial force generated by the first helical gear 220 and the second helical gear 230 during the meshing process, and the direction of the axial force will change with the different rotation directions of the first helical gear 220, and connects the cleaning component 300 with the second helical gear 230 through the output shaft 240, so that when the power source 210 drives the first helical gear 220 to rotate along the first rotation direction, the first helical gear 220 generates a first axial force on the second helical gear 230, and the first axial force can drive the second helical gear 230 to drive the cleaning component 300 to move toward the target surface, and then the cleaning component 300 contacts the target surface and cleans the target surface. When the power source 210 drives the first bevel gear 220 to rotate along the second rotation direction, the first bevel gear 220 generates a second axial force on the second bevel gear 230, and the second axial force is opposite to the first axial force. The second axial force can drive the second bevel gear 230 to drive the cleaning assembly 300 to move away from the target surface, thereby achieving the purpose of automatically controlling the lifting and lowering of the cleaning assembly relative to the target surface. In other words, in the technical solution of the present application, by adjusting the rotation direction of the power source 210, the power source 210 can drive the cleaning assembly 300 to extend and contact the target surface to clean the target surface, and can also drive the cleaning assembly 300 to retract to avoid unclean areas, thereby improving the adaptability of the cleaning equipment in different scenarios.

[0032] It is worth mentioning that the first bevel gear 220 and the second bevel gear 230 can also realize the power transmission, speed regulation and torque regulation functions of the power source 210 to replace the existing gear box connected to the output end of the power source 210. In other words, the technical solution of the present application integrates the telescopic component used to realize the telescopic movement of the cleaning component 300 and the gear box connected to the output end of the power source 210 into one, thereby reducing the weight of the cleaning equipment. Taking the sweeping robot as an example, compared with the existing telescopic component that adds 1-2 levels between the gear box and the cleaning component 300, the present application solution greatly reduces the space occupied in the vertical direction of the sweeping robot, so that the height of the sweeping robot can be made lower, which is suitable for cleaning low areas. In addition, since the lateral width of the telescopic component 200 of the present application mainly depends on the diameter of the first bevel gear 220 and the second bevel gear 230, the width of the telescopic component 200 can also be appropriately reduced by adjusting the number of gear teeth, which is suitable for cleaning narrow areas.

[0033] It should be noted that the first helical gear 220 and the second helical gear 230 are gears with beveled tooth surfaces, and the tooth surfaces are arranged at an oblique angle to the axis of the gear. Optionally, the first helical gear 220 and the second helical gear 230 can be helical gears or spiral gears.

[0034] In one possible implementation, Figure 3 As shown, the second bevel gear 230 and the output shaft 240 can be connected in rotation, so that the second bevel gear 230 can also drive the output shaft 240 to move axially, so as to drive the cleaning assembly 300 closer to or farther from the target surface. However, it is precisely because the second bevel gear 230 and the output shaft 240 are connected in rotation that the torque of the second bevel gear 230 cannot be transmitted to the output shaft 240, and the output shaft 240 cannot drive the cleaning assembly 300 to rotate and clean the target surface.

[0035] In actual applications, the output shaft 240 can pass through the inner hole of the second bevel gear 230, and two limit blocks 241 are provided on the output shaft 240, and the second bevel gear 230 is located between the two limit blocks 241, and each limit block 241 extends radially outward from the outer surface of the output shaft 240 along the output shaft 240 to realize the rotational connection between the second bevel gear 230 and the output shaft 240.

[0036] In another possible implementation, Figure 2 As shown, the second bevel gear 230 and the output shaft 240 can also be fixedly connected, and the second bevel gear 230 and the output shaft 240 are coaxially arranged. In this way, when the first bevel gear 220 rotates along the first rotation direction, the second bevel gear 230 rotates along the second rotation direction, the second bevel gear 230 drives the cleaning assembly 300 to move toward the target surface, and drives the cleaning assembly 300 to rotate along the second rotation direction through the output shaft 240. When the first bevel gear 220 rotates along the second rotation direction, the second bevel gear 230 rotates along the first rotation direction, the second bevel gear 230 drives the cleaning assembly 300 to move away from the target surface, and drives the cleaning assembly 300 to rotate along the first rotation direction through the output shaft 240. In other words, the second bevel gear 230 can not only drive the output shaft 240 to move axially so as to drive the cleaning assembly 300 closer to or away from the target surface, but also the torque of the second bevel gear 230 can be transmitted to the output shaft 240, so that the output shaft 240 can drive the cleaning assembly 300 to rotate and clean the target surface, so as to improve the cleaning effect of the cleaning assembly 300 on the target surface.

[0037] In actual applications, the second bevel gear 230 and the output shaft 240 can be tightly connected by cutting corresponding keyways on the second bevel gear 230 and the output shaft 240, and inserting keys in the keyways, so that the second bevel gear 230 and the output shaft 240 are fixedly connected. Alternatively, the second bevel gear 230 and the output shaft 240 can be fastened together by installing a tightening sleeve on the second bevel gear 230 and the output shaft 240, and installing bolts in the tightening sleeve. Alternatively, the second bevel gear 230 and the output shaft 240 can be integrally connected by welding on the second bevel gear 230 and the output shaft 240. The above-mentioned methods of fixing the second bevel gear 230 and the output shaft 240 are only exemplary and are not intended to be limiting.

[0038] The cleaning device can clean a substantially horizontal target surface or a substantially vertical target surface. For ease of understanding, the following embodiments of the cleaning device for cleaning these two different target surfaces are described in detail.

[0039] Embodiment 1: Figure 4 As shown, the cleaning assembly 300 can be located on the side of the body 100 to clean the vertical target surface. The cleaning device can first fit the cleaning assembly 300 to the vertical target surface (such as a wall or a vertical surface of an object), and then as the body 100 moves, the body 100 can drive the cleaning assembly 300 to clean the vertical target surface.

[0040] Example 2: Please refer to Figure 1 As shown, the cleaning assembly 300 can be located below the body 100, and is used to clean a substantially horizontal target surface (e.g., the ground or the horizontal surface of an object). For example, taking the cleaning device as a sweeping robot, when the cleaning device is placed on the ground, the cleaning assembly 300 is located between the ground and the body 100, and can be controlled by the telescopic assembly 200 to telescope relative to the target surface according to different areas to be cleaned, so as to extend the target surface to clean it, or retract it to avoid unclean areas.

[0041] Since the cleaning device is used to clean a substantially horizontal target surface, which is a common cleaning scenario, the following description will be based on the cleaning component 300 being located below the body 100 and the cleaning device being used to clean a substantially horizontal target surface.

[0042] In one possible implementation, please refer again to Figure 2The telescopic assembly 200 may further include a shell 250, which is connected to the body 100. The shell 250 serves as a basic carrier of the telescopic assembly 200, and is used to support other components of the telescopic assembly 200, so that other components of the telescopic assembly 200 can be assembled on the body 100 through the shell 250. Specifically, the shell 250 has a receiving chamber 251 and a first through hole 252, and the first through hole 252 is connected to the receiving chamber 251. The first bevel gear 220, the second bevel gear 230 and the output shaft 240 are located in the receiving chamber 251, and the output shaft 240 passes through the first through hole 252 to connect with the cleaning assembly 300, and the first through hole 252 limits the radial movement of the output shaft 240, so that the output shaft 240 and the second bevel gear 230 can only move and rotate around their axes.

[0043] In practical applications, the accommodating cavity 251 can also be filled with lubricating oil, and the shell 250 can also prevent the lubricating oil from leaking and foreign impurities from entering the accommodating cavity 251, thereby ensuring sufficient lubrication of the first bevel gear 220 and the second bevel gear 230 and reducing friction, thereby extending the service life.

[0044] In this embodiment, the accommodating cavity 251 has a top surface 2511 and a bottom surface 2512, and the second bevel gear 230 moves up and down between the top surface 2511 and the bottom surface 2512, so that the second bevel gear 230 is limited by the top surface 2511 and the bottom surface 2512, thereby preventing the second bevel gear 230 from falling off from the housing 250. In addition, the top surface 2511 and the bottom surface 2512 also determine the upper and lower limits of the cleaning assembly 300, so that the cleaning assembly 300 remains axially stationary at the corresponding limit position. Specifically, when the first bevel gear 220 rotates along the second rotation direction and the second bevel gear 230 abuts against the top surface 2511, the first bevel gear 220 still has a second axial force in the upward direction on the second bevel gear 230, but because the top surface 2511 blocks the second bevel gear 230 from continuing to move upward, the cleaning assembly 300 connected to the second bevel gear 230 is forced to remain stationary in the axial direction of the output shaft 240. Similarly, when the first bevel gear 220 rotates along the first rotation direction and the second bevel gear 230 abuts against the bottom surface 2512, the first bevel gear 220 still exerts a first axial force in the downward direction on the second bevel gear 230. However, the bottom surface 2512 blocks the second bevel gear 230 from continuing to move downward, thereby forcing the cleaning assembly 300 connected to the second bevel gear 230 to remain stationary in the axial direction of the output shaft 240.

[0045] In practical applications, when the cleaning device is placed on the target surface, the distance between the second bevel gear 230 and the bottom surface 2512 may be equal to the distance between the cleaning assembly 300 and the target surface. In this way, when the first bevel gear 220 drives the second bevel gear 230 to move downward to abut against the bottom surface 2512, it is ensured that the cleaning assembly 300 is in contact with the target surface, thereby achieving cleaning of the target surface.

[0046] Preferably, when the cleaning device is placed on the target surface, the distance between the second bevel gear 230 and the bottom surface 2512 may also be greater than the distance between the cleaning assembly 300 and the target surface. In this way, when the cleaning assembly 300 contacts the target surface, the second bevel gear 230 does not abut against the bottom surface 2512, and the first axial force generated by the first bevel gear 220 on the second bevel gear 230 can continue to act on the cleaning assembly 300, so that there is a pre-pressure between the cleaning assembly 300 and the target surface, so as to improve the cleaning effect of the cleaning assembly on the target surface.

[0047] It should be particularly pointed out that when the second bevel gear 230 is lifting and lowering between the top surface 2511 and the bottom surface 2512, the second bevel gear 230 and the first bevel gear 220 should always remain in meshing state, so as to avoid the second bevel gear 230 and the first bevel gear 220 being separated, thereby failing to drive the second bevel gear 230 to rotate and lift. Specifically, the distance between the first bevel gear 220 and the top surface 2511 should be less than the tooth thickness of the second bevel gear 230, and the distance between the first bevel gear 220 and the bottom surface 2512 should be less than the tooth thickness of the second bevel gear 230, so as to ensure that the second bevel gear 230 and the first bevel gear 220 are always in meshing state during the lifting and lowering movement between the top surface 2511 and the bottom surface 2512.

[0048] Furthermore, the tooth thickness of the first bevel gear 220 should be greater than the tooth thickness of the second bevel gear 230. In this way, the tooth thickness of the second bevel gear 230 can be made smaller, so that the second bevel gear 230 has a longer stroke in the accommodating cavity 251 to increase the lifting height of the cleaning component 300. Correspondingly, the weight of the second bevel gear 230 is also reduced, and the requirement for the size of the axial force generated by the meshing between the first bevel gear 220 and the second bevel gear 230 is also reduced.

[0049] In actual applications, since the cleaning component 300 is used to clean a roughly horizontal target surface, the cleaning component 300, the output shaft 240 and the second bevel gear 230 all move up and down. Therefore, the sum of the gravity of the cleaning component 300, the output shaft 240 and the second bevel gear 230 will inevitably hinder the second bevel gear 230 from moving upward, which is bound to affect the lifting and lowering movement of the cleaning component 300.

[0050] In order to make the first bevel gear 220 generate an axial force on the second bevel gear 230 sufficient to overcome the sum of the gravity of the cleaning assembly 300, the output shaft 240 and the second bevel gear 230, so as to realize the lifting movement of the cleaning assembly 300. In an achievable embodiment, the axial force generated by the first bevel gear 220 on the second bevel gear 230 can be increased by increasing the number of teeth of the first bevel gear 220 and the second bevel gear 230, and / or increasing the gear pressure angle of the first bevel gear 220 and the second bevel gear 230.

[0051] However, for cleaning devices such as sweeping robots that require high structural miniaturization and lightness, increasing the number of teeth of the first bevel gear 220 on the second bevel gear 230 to increase the axial force will inevitably lead to an increase in the overall volume of the cleaning device. Therefore, in order to solve the above problem, in another achievable implementation, as Figure 2 and Figure 6 As shown, the telescopic assembly 200 may further include a counteracting member 260. The counteracting member 260 is connected to the housing 250, and the counteracting member 260 abuts against the outer surface of the output shaft 240 and generates friction, thereby at least partially counteracting the sum of the gravity of the cleaning assembly 300, the output shaft 240 and the second bevel gear 230 through the friction. In this way, only a small axial force is required to drive the cleaning assembly 300 to rise and fall, so there is no need to enlarge the first bevel gear 220 and the second bevel gear 230, that is, there is no need to increase the volume of the cleaning device.

[0052] In this embodiment, there is a preset difference between the above-mentioned friction force and the sum of the gravity of the second bevel gear 230, the output shaft 240 and the cleaning assembly 300. In an ideal state, the preset difference can be zero, so that the lifting and lowering movement of the cleaning assembly 300 is driven by the axial force generated between the first bevel gear 220 and the second bevel gear 230. When the preset difference is not zero, the preset difference should also be smaller than the second axial force, so that the second axial force can overcome the gravity of the cleaning assembly 300, the output shaft 240 and the second bevel gear 230, and drive the cleaning assembly 300 to move upward.

[0053] Regarding the specific structure of the offset member 260, this application provides two achievable embodiments for reference.

[0054] Embodiment 1, as Figure 2 As shown, the offset member 260 can be a friction block, which at least partially abuts against the outer surface of the output shaft 240. The output shaft 240 tends to move downward under the action of gravity, and a friction force opposite to the direction of gravity of the output shaft 240 is formed between the friction block and the outer surface of the output shaft 240.

[0055] In practical applications, the friction block can be installed on the outside of the housing 250 or on the inside of the housing 250, and this application does not make specific restrictions on this. The contact surface between the friction block and the output shaft 240 can be constructed as an arc structure so that the friction block and the output shaft 240 can be completely fitted, thereby increasing the contact area between the friction block and the output shaft 240, and then increasing the friction between the friction block and the output shaft 240. Of course, the friction block can also be connected to the housing 250 through an adjustment mechanism, and the adjustment mechanism adjusts the friction between the friction block and the output shaft 240 by adjusting the extrusion force between the friction block and the output shaft 240. Among them, the adjustment mechanism can adopt a screw, the friction block is connected to one end of the screw, and the screw is threadedly connected to the housing 250. When in use, the extrusion force between the friction block and the outer surface of the output shaft 240 can be adjusted by rotating the screw forward and backward.

[0056] Embodiment 2, as Figure 5 and Figure 6 As shown, the offset member 260 can be a sealing ring 261. The sealing ring 261 is embedded in the first through hole 252 and filled between the outer surface of the output shaft 240 and the inner wall of the first through hole 252. The sealing ring 261 is interference-connected with the output shaft 240, and friction is formed between the sealing ring 261 and the output shaft 240. In this way, the sealing ring 261 can not only generate friction with the output shaft 240 to at least partially offset the gravity of the cleaning component 300, the output shaft 240 and the second bevel gear 230; and the sealing ring 261 can also block the gap between the outer surface of the output shaft 240 and the inner wall of the first through hole 252 to prevent the lubricating oil in the accommodating chamber 251 from leaking and foreign impurities from entering the accommodating chamber 251.

[0057] In this embodiment, an annular groove 253 is provided at the bottom of the first through hole 252, an opening 254 is provided at the bottom of the annular groove 253, and a sealing ring 261 is installed in the annular groove 253 through the opening 254. The telescopic assembly 200 may further include an annular baffle 262, which is detachably connected to the housing 250, and the annular baffle 262 covers the opening 254 to fix the sealing ring 261 in the annular groove 253. The inner side of the annular groove 253 should be connected to the first through hole 252, so that the sealing ring 261 can extend to the inside of the first through hole 252 through the connection between the annular groove 253 and the first through hole 252 and be interference-connected with the output shaft 240. Among them, the inner diameter of the sealing ring 261 should be smaller than the diameter of the output shaft 240, so that when the sealing ring 261 is sleeved on the output shaft 240, the sealing ring 261 can be interference-connected with the output shaft 240.

[0058] During the meshing process between the first bevel gear 220 and the second bevel gear 230, the first bevel gear 220 not only generates an axial force on the second bevel gear 230, but also generates a radial force on the second bevel gear 230, pushing the second bevel gear 230 to move away from the first bevel gear 220. However, in the above embodiment, the output shaft 240 is radially limited only by the first through hole 252, which will inevitably cause the output shaft 240 to bear too much torque, thereby affecting the service life of the output shaft 240.

[0059] To resolve the above issues, please participate again Figure 2 and Figure 5 In one achievable implementation, a guide groove 242 is provided at the top of the output shaft 240, and the guide groove 242 is coaxially arranged with the output shaft 240. The telescopic assembly 200 may further include a guide post 270, which is connected to the housing 250, and extends downward from the top surface 2511 and extends into the guide groove 242, so that the radial movement of the output shaft 240 is limited by the guide post 270. In this way, the guide post 270 and the first through hole 252 can respectively limit the upper and lower ends of the output shaft 240 in the radial direction, thereby reducing the magnitude of the torque borne by the output shaft 240 and improving the service life of the output shaft 240.

[0060] In this embodiment, the telescopic assembly may further include a first sleeve 271, which is in interference connection with the output shaft 240, and is located between the inner wall of the guide groove 242 and the guide post 270, and the guide post 270 limits the radial movement of the output shaft 240 through the first sleeve 271. In other words, the guide post 270 contacts the inner wall of the guide groove 242 through the first sleeve 271, and the first sleeve 271 is equivalent to forming a friction surface between the guide post 270 and the guide groove 242, reducing the direct contact between the guide post 270 and the guide groove 242, thereby reducing friction and wear. At the same time, the first sleeve 271 can also provide support and guidance to ensure the accurate position and movement of the guide post 270 in the guide groove 242.

[0061] In practical applications, the first sleeve 271 is a sleeve-shaped part, usually made of metal or polymer, and has an inner diameter and an outer diameter. The inner diameter of the first sleeve 271 matches the diameter of the guide column 270 , and the outer diameter of the first sleeve 271 matches the diameter of the guide groove 242 .

[0062] Using a similar principle, the telescopic assembly 200 may further include a second sleeve 272, which is interference-connected with the housing 250, and is located between the inner wall of the first through hole 252 and the output shaft 240. The first through hole 252 limits the radial movement of the output shaft 240 through the second sleeve 272, thereby reducing the direct contact between the output shaft 240 and the first through hole 252, thereby reducing friction and wear. At the same time, the second sleeve 272 can also provide support and guidance to ensure the accurate position and movement of the output shaft 240 in the first through hole 252. The specific structure of the second sleeve 272 can refer to the first sleeve 271, and will not be repeated here.

[0063] The housing 250 can be formed in one piece. To facilitate installation of components in the housing 250, the housing 250 can also be designed in a split form. Specifically, in an achievable implementation, please refer to Figure 5 and Figure 7 The housing 250 may include a housing seat 255 and a housing cover 256. The housing seat 255 is connected to the machine body 100, and the housing cover 256 is connected to the housing seat 255, and the housing cover 256 covers the top opening of the housing seat 255, so that the housing cover 256 and the housing seat 255 together surround and form the above-mentioned accommodating cavity 251.

[0064] In this embodiment, the first through hole 252 can be provided on the housing seat 255, and the guide post 270 is fixedly connected to the housing cover 256. When the housing seat 255 is connected to the housing cover 256, the guide post 270 is coaxially arranged with the first through hole 252, so that the guide post 270 can be just inserted into the guide groove 242. The housing seat 255 can also be fixedly connected with a first gear shaft 280, the axis of the first gear shaft 280 is parallel to the axial direction of the guide post 270, and the first bevel gear 220 is rotatably connected to the first gear shaft 280, so that the first bevel gear 220 is rotatably connected to the housing 250.

[0065] In actual application, a limiting groove 281 can also be opened on the shell cover 256. When the shell seat 255 is connected to the shell cover 256, the top of the first gear shaft 280 is inserted into the limiting groove 281. The limiting groove 281 ensures that the first gear shaft 280 maintains a stable position during operation, thereby reducing the vibration and deviation of the first bevel gear 220 connected to the first gear shaft 280, and improving the meshing accuracy and transmission reliability between the first bevel gear 220 and the second bevel gear 230.

[0066] The power source 210 can be directly connected to the machine body 100, or can be indirectly installed on the machine body 100 by connecting the housing 250 to the machine body 100. Taking the case where the power source 210 is connected to the machine body 100 through the housing 250 as an example, the power source 210 is located outside the accommodating chamber 251, and the power source 210 can be connected to the housing cover 256 or the housing seat 255. Preferably, the power source 210 should be connected to the housing seat 255, and the output end of the power source 210 extends into the accommodating chamber 251 through the housing seat 255 and is connected to the first bevel gear 220. In this way, compared with the way the power source 210 is connected to the housing cover 256, the present embodiment can arrange the power source 210 and the cleaning assembly 300 on the same side of the housing 250 by connecting the power source 210 to the housing seat 255, which can reduce the vertical height of the telescopic assembly 200, thereby further reducing the overall height of the cleaning device.

[0067] In one possible implementation, Figure 5 As shown, the telescopic assembly 200 may further include a transmission component 290. The transmission component 290 is located in the accommodating chamber 251, and the output end of the power source 210 is connected to the first bevel gear 220 through the transmission component 290 to drive the first bevel gear 220 to rotate along the first rotation direction or along the second rotation direction. In practical applications, the transmission component 290 may adopt a gear drive, a belt drive, a chain drive, or a transmission mode in which any combination of the above multiple transmission modes is used, and this application does not limit this.

[0068] Taking the transmission component 290 as an example, in a feasible implementation, as Figure 5 As shown, the transmission component 290 may include a driving wheel 291, a first double gear 292 and a driven wheel 293. The driving wheel 291 is connected to the output end of the power source 210. The first double gear 292 is rotatably connected to the housing seat 255, and the first double gear 292 includes a first gear portion 2921 and a second gear portion 2922. The first gear portion 2921 is meshed with the driving wheel 291. The driven wheel 293 is coaxially connected to the first bevel gear 220 and forms a second double gear (see Figure 8 As shown in FIG. 2 , the driven wheel 293 is meshed with the second gear portion 2922. Thus, when the power source 210 drives the driving wheel 291 to rotate, the driving wheel 291 drives the driven wheel 293 to rotate through the first double gear 292, and since the driven wheel 293 is coaxially connected with the first bevel gear 220, the first bevel gear 220 is driven to rotate. It should be noted that the transmission component 290 using the gear transmission method can not only realize power transmission to drive the first bevel gear 220 to rotate, but also the multi-stage gears can cooperate with each other to change the output speed and torque of the power source 210 to adapt to the speed requirements under different working conditions and to adapt to different workloads.

[0069] In an achievable embodiment, the cleaning device may further include a mounting member 400. The mounting member 400 is detachably connected to the output shaft 240, and the second bevel gear 230 and the mounting member 400 are respectively located at both ends of the output shaft 240, and the mounting member 400 is detachably connected to the cleaning assembly 300. In this way, the mounting member 400 may be first connected to the output shaft 240, and subsequently, only the mounting member 400 and the cleaning assembly 300 need to be disassembled and assembled to achieve replacement of the cleaning assembly 300, which is more convenient and quick to operate, thereby improving the user experience.

[0070] Based on the same inventive concept, the present application also provides a telescopic assembly. Fig. 9 As shown, the telescopic assembly may at least include a base 500, a first bevel gear 220 and a second bevel gear 230, wherein a first through hole 252 is provided on the base 500. The first bevel gear 220 is rotatably connected to the base 500, and the first bevel gear 220 is used for transmission connection with the power source 210, so that the power source 210 drives the first bevel gear 220 to rotate in the first rotation direction or in the second rotation direction. The second bevel gear 230 is meshed with the first bevel gear 220, and the second bevel gear 230 is coaxially connected with an output shaft 240, and the output shaft 240 passes through the first through hole 252, and the first through hole 252 limits the radial movement of the output shaft 240. When the power source 210 drives the first bevel gear 220 to rotate in the first rotation direction or in the second rotation direction, the first bevel gear 220 generates an axial force on the second bevel gear 230, so as to drive the second bevel gear 230 to reciprocate along its axis, thereby driving the output shaft 240 to perform telescopic movement relative to the base 500, thereby realizing the telescopic function.

[0071] Based on the same inventive concept, the present application also provides a gear box, which can be applied to a cleaning device, and the gear box can be used as an integral system, integrally assembled in the cleaning device, or integrally disassembled from the cleaning device.

[0072] Specifically, the gearbox may include at least a housing 250, a first helical gear 220, and a second helical gear 230. The housing 250 has a receiving chamber 251 and a first through hole 252, and the first through hole 252 is in communication with the receiving chamber 251. The first helical gear 220 is located in the receiving chamber 251 and is rotatably connected to the housing 250. The first helical gear 220 is used for transmission connection with the power source 210, so that the power source 210 drives the first helical gear 220 to rotate in the first rotation direction or in the second rotation direction. The second helical gear 230 is located in the receiving chamber 251 and meshes with the first helical gear 220. The second helical gear 230 is fixedly connected with an output shaft 240, and the output shaft 240 is coaxially arranged with the second helical gear 230. The output shaft 240 passes through the first through hole 252 and extends to the outside of the housing 250, and the first through hole 252 limits the radial movement of the output shaft 240.

[0073] When the gearbox is integrated into the cleaning equipment, the cleaning component 300 can be connected to the output shaft 240 extending to the outside of the shell 250. In this way, the gearbox can not only transmit and convert the rotational speed and torque of the power source 210, so that the cleaning component 300 cleans the target surface at a suitable rotational speed and torque, but also can control the telescopic movement of the cleaning component 300 to adapt to different cleaning scenarios.

[0074] Furthermore, the gearbox further includes a sealing ring 261. The sealing ring 261 is embedded in the first through hole 252 and fills between the output shaft 240 and the inner wall of the first through hole 252. The sealing ring 261 is interference-connected with the output shaft 240, and friction is formed between the sealing ring 261 and the output shaft 240. When the axis of the output shaft 240 is in a vertical state, the friction at least partially offsets the sum of the gravity of the second bevel gear 230, the output shaft 240 and the cleaning assembly 300.

[0075] The specific structures of the first bevel gear 220 , the second bevel gear 230 , the output shaft 240 , the housing 250 and the sealing ring 261 and their connection relationship may refer to the contents in the above-mentioned embodiment, which will not be described in detail here.

[0076] The following is a detailed description based on specific application scenarios, taking the cleaning device as a sweeping robot as an example.

[0077] Application scenario 1

[0078] A user purchased a sweeping robot, in which the motor is connected to the rag plate through a gear box, and the gear box integrates the transmission and telescopic functions into one. The motor can not only drive the rag plate to rotate and clean through the gear box, but also drive the rag plate to rise and fall through the gear box. There is no need to set up additional 1-2 level telescopic components between the gear box and the rag plate, so that the overall vertical height of the sweeping robot can be made lower.

[0079] When the sweeping robot cleans the bedroom, precisely because the above-mentioned sweeping robot is further designed to lower the overall vertical height, for the low area under the bed that could not be cleaned before, the sweeping robot can smoothly drill into the bottom of the bed and clean the low area under the bed, so as to achieve cleaning without dead angles and improve the user experience.

[0080] Application scenario 2

[0081] The user uses the APP to remotely start the sweeping robot to clean the living room. The sweeping robot first plans the cleaning path based on the stored living room floor plan using the shortest path algorithm. The sweeping robot then moves from the base station's recharging ramp to the ground and uses sensors to detect the surrounding environment to obtain ground information on the cleaning path, such as whether there are obstacles on the cleaning path, obstacle height, ground material information, etc. The sweeping robot then adjusts the rise and fall of the mop plate based on this information to adapt to different cleaning scenarios.

[0082] When the sweeping robot detects that the ground material information is flannel material, it finds that the area is not suitable for mopping the ground, so the sweeping robot drives the first bevel gear to rotate along the second rotation direction through the motor, thereby automatically raising the rag plate, thereby preventing the rag plate from dirtying the carpet. When the sweeping robot detects that the ground material information is hard surface material, it finds that the ground can be mopped, so the sweeping robot drives the first bevel gear to rotate along the first rotation direction through the motor, thereby automatically lowering the rag plate, and then using the rag plate to clean the ground. When the sweeping robot detects that there is a slope on the cleaning path ahead, the sweeping robot can control the rag plate to rise again. After the sweeping robot climbs over the slope, the sweeping robot lowers the rag plate again, thereby continuing to use the rag plate to clean the ground.

[0083] It can be seen that the technical solution provided by the present application is that the power source is connected to the first bevel gear in a transmission manner, and the power source can drive the first bevel gear to rotate in a first rotation direction or in a second rotation direction opposite to the first rotation direction, and the first bevel gear is meshed with the second bevel gear. The present application utilizes the axial force generated by the first bevel gear and the second bevel gear during the meshing process, and the direction of the axial force will change with the different rotation directions of the first bevel gear, and connects the cleaning component to the second bevel gear through the output shaft, so that when the power source drives the first bevel gear to rotate in the first rotation direction, the first bevel gear generates a first axial force on the second bevel gear, and the first axial force can drive the second bevel gear to drive the cleaning component to move toward the target surface and contact the target surface. When the power source drives the first bevel gear to rotate in the second rotation direction, the first bevel gear generates a second axial force on the second bevel gear, and the second axial force can drive the second bevel gear to drive the cleaning component to move in a direction away from the target surface, thereby achieving the purpose of automatically controlling the lifting of the cleaning component. In the technical solution of the present application, by adjusting the rotation direction of the power source, the power source can drive the cleaning component to extend and contact the target surface to clean the target surface, and can also drive the cleaning component to retract to avoid unclean areas, thereby improving the adaptability of the cleaning equipment in different scenarios.

[0084] At the same time, the first bevel gear and the second bevel gear can also realize the power transmission, speed regulation and torque regulation functions of the power source to replace the existing gear box connected to the output end of the power source. In other words, the technical solution of the present application integrates the telescopic component connected to the cleaning component and the gear box connected to the output end of the power source into one, thereby reducing the weight of the cleaning equipment. Taking the sweeping robot as an example, this solution greatly reduces the space occupied in the vertical direction of the sweeping robot, so that the height of the sweeping robot can be made lower, which is suitable for cleaning low areas. Moreover, according to actual use, the number of teeth of the first bevel gear and the second bevel gear can be reduced, thereby reducing the lateral length of the telescopic component, and then the width of the sweeping robot can be made narrower, which is suitable for cleaning narrow areas.

[0085] Furthermore, when the cleaning device is placed on the target surface, the distance between the second bevel gear and the bottom surface can be greater than the distance between the cleaning assembly and the target surface. In this way, when the cleaning assembly contacts the target surface, the second bevel gear does not abut against the bottom surface, and the first axial force generated by the first bevel gear on the second bevel gear can continue to act on the cleaning assembly, so that there is a pre-pressure between the cleaning assembly and the target surface, so as to improve the cleaning effect of the cleaning assembly on the target surface.

[0086] Furthermore, a counteracting member is connected to the housing, and the counteracting member abuts against the outer surface of the output shaft and generates friction, thereby at least partially counteracting the sum of the gravity of the cleaning assembly, the output shaft and the second bevel gear through the friction. In this way, only a small axial force is needed to drive the cleaning assembly to rise and fall, so there is no need to increase the number of teeth of the first bevel gear and the second bevel gear to increase the axial force, that is, there is no need to enlarge the first bevel gear and the second bevel gear, and the overall volume of the cleaning device can be further reduced.

[0087] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A cleaning device, characterized in that: The cleaning device at least comprises a body, a telescopic assembly and a cleaning assembly, wherein the telescopic assembly comprises a power source, a first helical gear and a second helical gear; The power source is mounted on the machine body, and the power source is drivingly connected to the first bevel gear to drive the first bevel gear to rotate along a first rotation direction, or along a second rotation direction opposite to the first rotation direction; The second bevel gear is meshed with the first bevel gear, and the second bevel gear is connected to the cleaning assembly via an output shaft, and the cleaning assembly is used to clean the target surface; When the first bevel gear rotates along the first rotation direction, the first bevel gear generates a first axial force on the second bevel gear to drive the second bevel gear to drive the cleaning component to move toward the target surface; when the first bevel gear rotates along the second rotation direction, the first bevel gear generates a second axial force on the second bevel gear to drive the second bevel gear to drive the cleaning component to move away from the target surface.

2. The cleaning device according to claim 1, characterized in that The output shaft is fixedly connected to the second bevel gear and the cleaning assembly respectively, and the second bevel gear is coaxially arranged with the output shaft; When the first bevel gear rotates along the first rotation direction, the second bevel gear rotates along the second rotation direction, and drives the cleaning assembly to rotate along the second rotation direction through the output shaft; When the first bevel gear rotates along the second rotation direction, the second bevel gear rotates along the first rotation direction and drives the cleaning assembly to rotate along the first rotation direction through the output shaft.

3. The cleaning device according to claim 2, characterized in that: The cleaning component is located below the machine body.

4. The cleaning device according to claim 3, characterized in that: The telescopic assembly also includes a housing; The shell is connected to the body, and has a containing cavity and a first through hole, wherein the first through hole is communicated with the containing cavity; The first bevel gear, the second bevel gear and the output shaft are located in the accommodating cavity, the output shaft passes through the first through hole to be connected with the cleaning component, and the first through hole limits the radial movement of the output shaft.

5. The cleaning device according to claim 4, characterized in that The accommodating cavity has a top surface and a bottom surface; When the first bevel gear rotates in a second rotation direction and the second bevel gear abuts against the top surface, the top surface blocks the second bevel gear from moving upward, so that the cleaning assembly remains stationary in the axial direction of the output shaft; When the first bevel gear rotates in a first rotation direction and the second bevel gear abuts against the bottom surface, the bottom surface blocks the second bevel gear from moving downward, so that the cleaning assembly remains stationary in the axial direction of the output shaft.

6. The cleaning device according to claim 5, characterized in that The telescopic assembly also includes a counteracting member; The offset member is connected to the housing, and the offset member abuts against the outer surface of the output shaft to generate friction; There is a preset difference between the friction force and the sum of the gravity of the second bevel gear, the output shaft and the cleaning assembly, and the preset difference is smaller than the second axial force.

7. The cleaning device according to claim 6, characterized in that The friction force is equal to the sum of the weight of the second bevel gear, the output shaft and the cleaning assembly.

8. The cleaning device according to claim 6, characterized in that The offsetting member is a sealing ring; The sealing ring is embedded in the first through hole and filled between the outer surface of the output shaft and the inner wall of the first through hole; The sealing ring is interference-connected with the output shaft, and the friction force is generated between the sealing ring and the output shaft.

9. The cleaning device according to claim 8, characterized in that The telescopic assembly also includes an annular baffle; An annular groove is provided at the bottom end of the first through hole, the bottom of the annular groove has an opening, and the inner side surface of the annular groove is connected to the first through hole; The annular baffle is detachably connected to the housing, and covers the opening to fix the sealing ring in the annular groove.

10. The cleaning device according to claim 5, characterized in that The tooth thickness of the first helical gear is greater than the tooth thickness of the second helical gear; The distance between the first bevel gear and the top surface is smaller than the tooth thickness of the second bevel gear, and the distance between the first bevel gear and the bottom surface is smaller than the tooth thickness of the second bevel gear.

11. The cleaning device according to claim 5, characterized in that A guide groove is provided on the top of the output shaft, and the guide groove is coaxially arranged with the output shaft; The telescopic assembly further comprises a guide post connected to the housing, and the guide post extends downward from the top surface and extends into the guide groove, so that the radial movement of the output shaft is limited by the guide post.

12. The cleaning device according to claim 11, characterized in that The telescopic assembly also includes a first sleeve; The first sleeve is interference-connected with the output shaft. The first sleeve is located between the inner wall of the guide groove and the guide column. The guide column limits radial movement of the output shaft through the first sleeve.

13. The cleaning device according to claim 12, characterized in that The telescopic assembly also includes a second sleeve; The second sleeve is interference-connected with the housing, the second sleeve is located between the inner wall of the first through hole and the output shaft, and the first through hole limits radial movement of the output shaft through the second sleeve.

14. The cleaning device according to claim 4, characterized in that The housing comprises a housing seat and a housing cover; The shell base is connected to the body, and the shell cover is connected to the shell base and together surrounds the accommodating cavity.

15. The cleaning device according to claim 14, characterized in that The telescopic assembly also includes a transmission component; The power source is connected to the housing seat, the power source is located outside the accommodating cavity, and the output end of the power source passes through the housing seat and extends into the accommodating cavity; The transmission component is located in the accommodating cavity, and the output end of the power source is connected to the first bevel gear through the transmission component.

16. The cleaning device according to claim 15, characterized in that The transmission component includes a driving wheel, a first double gear and a driven wheel; The driving wheel is connected to the output end of the power source; The first double gear is rotatably connected to the housing seat, the first double gear has a first gear portion and a second gear portion, and the first gear portion is meshed with the driving wheel; The driven wheel and the first bevel gear are coaxially connected to form a second double gear, and the driven wheel is meshed with the second gear portion.

17. The cleaning device according to claim 1, characterized in that The cleaning device also includes a mounting member; The mounting member is detachably connected to the output shaft, and the second bevel gear and the mounting member are respectively located at two ends of the output shaft, and the mounting member is detachably connected to the cleaning assembly.

18. The cleaning device according to claim 2, characterized in that The cleaning component is located on the side of the machine body.

19. A telescopic assembly, characterized in that: The telescopic assembly at least comprises a base, a first helical gear and a second helical gear, wherein the base has a first through hole; The first bevel gear is rotatably connected to the base, and the first bevel gear is used for transmission connection with a power source, so that the power source drives the first bevel gear to rotate along a first rotation direction or along a second rotation direction; The second helical gear is meshed with the first helical gear, the second helical gear is coaxially connected with an output shaft, the output shaft passes through the first through hole, and the first through hole limits radial movement of the output shaft.

20. A gear box, characterized in that: The gearbox comprises at least a housing, a first helical gear and a second helical gear; The housing has a receiving cavity and a first through hole, wherein the first through hole is communicated with the receiving cavity; The first bevel gear is located in the accommodating cavity and is rotatably connected to the housing. The first bevel gear is used for transmission connection with a power source, so that the power source drives the first bevel gear to rotate along a first rotation direction or along a second rotation direction; The second helical gear is located in the accommodating cavity and meshes with the first helical gear. The second helical gear is coaxially fixedly connected with an output shaft. The output shaft passes through the first through hole and extends to the outside of the housing. The first through hole limits the radial movement of the output shaft.

21. The gearbox according to claim 20, characterized in that: The gear box also includes a sealing ring; The sealing ring is embedded in the first through hole and filled between the output shaft and the inner wall of the first through hole. The sealing ring is interference-connected with the output shaft and friction force is formed between the sealing ring and the output shaft. When the axis of the output shaft is in a vertical state, the friction force at least partially offsets the sum of the weights of the second bevel gear, the output shaft, and the cleaning assembly connected to the output shaft.

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