Impeller mechanism and cleaning device

Abstract

Impeller mechanism, characterized in that it comprises an impeller assembly (1), a cam (2) and a drive assembly (3), wherein the drive assembly (3) is fixedly connected to a first housing (4) of a cleaning device, wherein the drive assembly (3) is drivenly connected to the cam (2), wherein the cam (2) collides with the impeller assembly (1), wherein the impeller assembly (1) is slidably connected to the second housing (5) of the cleaning device and the sliding direction is in the vertical direction.

Description

[0001] This application claims priority to Chinese patent application 202421396452.1, filed on June 18, 2024. The Chinese patent application is incorporated herein by reference in its entirety.

[0002] The present application relates to the technical field of cleaning devices and in particular to an impeller mechanism and a cleaning device.

[0003] In order to maintain the balance and normal work of the cleaning device during movement, the distance between the bottom of the cleaning device and the ground must not be too large; However, in special scenarios, there are cases where the distance between the bottom and the ground is too close, which in turn affects the work of the cleaning device; For example, when there are obstacles, the bottom is too low, so that the obstacles cannot be passed over; In deep water, the bottom is too low, so that water may penetrate into the interior of the cleaning device and damage it.

[0004] To address the above-mentioned problems of the prior art, an impeller mechanism is provided in the present application, specifically, the impeller assembly is driven by a cam to slide relative to the second housing, thereby changing the height difference between the impeller assembly and the second housing and thus changing the distance between the body of the cleaning device and the ground.

[0005] To solve the above problem, the present application provides an impeller mechanism comprising an impeller assembly, a cam, and a drive assembly; wherein the drive assembly is fixedly connected to a first housing of a cleaning device, the drive assembly is drivingly connected to the cam; the cam is butted with the impeller assembly, the impeller assembly is slidably connected to the second housing of the cleaning device, and the sliding direction is in the height direction.

[0006] Preferably, the drive assembly comprises a drive unit and a drive shaft, the drive unit being fixedly connected to the first housing, the drive unit being drivingly connected to one end of the drive shaft, the other end of the drive shaft being connected to the first housing by a bearing structure; The cam is firmly connected to the drive shaft.

[0007] Preferably, the impeller assembly comprises a contact pressure plate, a sliding bushing, an impeller mounting base and an impeller, the impeller being mounted on the impeller mounting base; wherein the sliding bushing is slidably connected to the second housing, wherein the sliding bushing is connected to the impeller mounting base; wherein the cam engages with the contact pressure plate and the contact pressure plate is fixed to the sliding bush.

[0008] Preferably, the impeller assembly further comprises an elastic member, one end of the elastic member being connected to the contact pressure plate and the other end of the elastic member being connected to the second housing.

[0009] Preferably, the contact pressure plate is provided with an inclined surface and a horizontal surface, wherein the inclined surface is arranged adjacent to the horizontal surface and the inclined surface is higher than the horizontal surface.

[0010] Preferably, the cam is provided with a contact roller, wherein the cam is collided with the contact pressure plate by the contact roller.

[0011] Preferably, the cam comprises a distal end remote from the drive shaft and a proximal end adjacent to the drive shaft, wherein the contact roller is provided at the distal end.

[0012] Preferably, the cam is in contact with the contact pressure plate by a curved surface of the cam.

[0013] Preferably, the impeller mounting base is provided with a universal rotary shaft, wherein a rotary shaft mounting hole is provided in the sliding bushing; The impeller mounting base is rotatably connected to the sliding bushing through the universal rotary shaft and the rotary shaft mounting hole.

[0014] Preferably, an anti-loosening locking structure is provided in the rotary shaft mounting hole, wherein the rotary shaft mounting hole is positioned outside the universal rotary shaft. The anti-loosening locking structure is locked to the universal rotary shaft.

[0015] On the other hand, the present application also provides a cleaning device, the cleaning device comprising the impeller mechanism, a first housing and a second housing.

[0016] As a result of the above-mentioned technical solution, an impeller mechanism mentioned in the present application has the following advantageous effects: The drive assembly is fixedly connected to the first housing, and the cam is butted with the impeller assembly, and the impeller assembly is slidably connected to the second housing in the height direction, so that the cam can be rotated under the drive of the drive assembly, and the impeller assembly slides with respect to the second housing under the action of the contact force, so that the height difference between the impeller assembly and the second housing is changed, and thus the distance between the body of the cleaning device and the ground is changed to meet the requirements of different working scenarios of the cleaning device, that is, the flexibility of the impeller mechanism is improved, and the working flexibility of the cleaning device is improved.

[0017] The change of the height difference between the impeller assembly and the second casing can be achieved by adjusting the cam and the drive assembly, thereby avoiding the use of a complex structure such as a lead screw and thereby simplifying the mechanical structure of the floor change of the cleaning device and thereby reducing the manufacturing cost of the impeller mechanism.

[0018] To more clearly illustrate the technical solutions of the present application, a brief description of the figures to be used in describing the embodiments or prior art is given below. It is obvious that the figures in the following description are some embodiments of the present application, and other figures can be obtained without creative effort by general technical personnel in this field based on the figures. Fig. 1 is a schematic diagram of the structure of an impeller mechanism in the embodiments of the present application; Fig. 2 is a schematic diagram of the structure of a drive assembly in the idler mechanism in the embodiments of the present application; Fig. 3 is a schematic diagram of the mounting structure of a bearing holder in the idler mechanism in the embodiments of the present application; Fig. 4 is a schematic diagram of the structure of the impeller assembly in the impeller mechanism in the embodiments of the present application; Fig. 5 is a schematic diagram of the structure of the contact pressure plate in the impeller mechanism in the embodiments of the present application; Fig. 6 is a schematic diagram of a cam structure in the impeller mechanism in the embodiments of the present application; Fig. 7 is a schematic diagram of a cam structure in the impeller mechanism in another embodiment of the present application; Fig. 8 is a sectional view of the assembly of a slide bushing with the impeller mounting base in the impeller mechanism in the embodiments of the present application.

[0019] The technical solutions in the embodiments of the present application are described clearly and completely below with the figures in the embodiments of the application. It is obvious that the described embodiments are only a part of the embodiments of the present application and not all of them. All other embodiments obtained by general technical personnel in this field based on the embodiments of the application without creative effort are within the scope of the application.

[0020] However, as used herein, "an embodiment" or "an embodiment" refers to a particular feature, structure, or characteristic described in at least one embodiment of the application. In the description of the present application, the terms "top," "bottom," "left," "right," "upper," "lower," etc., refer to an orientation or relationship based on the orientation or relationship shown in the figures and are used only to facilitate and simplify the description of the application. They do not imply that the recited device or element must have a particular orientation, be constructed, and function in a particular orientation, and are therefore not intended to limit the application.Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply a relative importance or an implicit determination of the number of specified technical features. Thus, the features designated "first" and "second" may explicitly or implicitly include one or more such features. It should be noted that the terms "first," "second," etc., are used to distinguish similar objects and do not need to be used to describe a particular order or sequence. It is understood that the data used in this way may be interchangeable, so that the embodiments of the present application described herein may be implemented in an order different from that shown or described herein.

[0021] Combined with Fig. 1 describes an impeller mechanism provided by an embodiment of the present application, the mechanism comprising an impeller assembly 1, a cam 2 and a drive assembly 3, the drive assembly 3 being fixedly connected to a first housing 4 of a cleaning device, the drive assembly 3 being drivingly connected to the cam 2, the cam 2 being abutted with the impeller assembly 1, the impeller assembly 1 being slidably connected to the second housing 5 of the cleaning device and the sliding direction being in the height direction.

[0022] In the embodiments of the present application, the impeller assembly 1 is always in contact with the ground, and the impeller assembly 1 is used to move the cleaning device; the cam 2 is used to slide the impeller assembly 1 with respect to the second housing 5 under the drive of the drive assembly 3; the drive assembly 3 is used to drive the cam 2 to rotate.

[0023] In the embodiments of the present application, the first housing 4 and the second housing 5 refer to two different housing structures; Preferably, the first housing 4 can be detachably connected to the second housing 5.

[0024] In another preferred embodiment of the present application, the first housing 4 is fixedly connected to the second housing 5; preferably, the first housing 4 is formed integrally with the second housing 5.

[0025] In another specific embodiment of the present application, in which the first housing 4 is integrally molded with the second housing 5, it is assumed that the first housing 4 and the second housing 5 refer to two different parts of the same housing.

[0026] In the specific embodiments of the present application, the first housing 4 and the second housing 5 are a housing at the bottom of the cleaning device, and the body of the cleaning device moves relative to the ground with the movement of the second housing 5; specifically, in the case where the second housing 5 moves away from the impeller assembly 1, the body of the cleaning device moves away from the ground; and in the case where the second housing 5 moves closer to the impeller assembly 1, the cleaning device moves closer to the ground.

[0027] In the embodiments of the present application, the drive assembly 3 is fixedly connected to the first housing 4, the cam 2 is butted with the impeller assembly 1, and the impeller assembly 1 is slidably connected to the second housing 5 in the height direction, so that the cam 2 can be rotated under the drive of the drive assembly 3, and the impeller assembly 1 slides with respect to the second housing 5 under the action of the contact force. The height difference between the impeller assembly 1 and the second housing 5 is changed, and thus the distance between the body of the cleaning device and the ground is changed to meet the requirements of different working scenarios of the cleaning device, that is, the flexibility of the impeller mechanism is improved and the working flexibility of the cleaning device is improved.

[0028] In the embodiments of the present application, the change in the height difference between the impeller assembly 1 and the second housing 5 can be achieved by adjusting the cam 2 and the drive assembly 3, thereby avoiding the use of a complex structure such as a lead screw and thereby simplifying the mechanical structure of the floor change of the cleaning device and thereby reducing the manufacturing cost of the impeller mechanism.

[0029] As in the Fig. 1 and Fig. 2, in the embodiments of the present application, the drive assembly 3 comprises a drive unit 31 and a drive shaft 32, wherein the drive unit 31 is fixedly connected to the first housing 4, the drive unit 31 is drivingly connected to one end of the drive shaft 32, and the other end of the drive shaft 32 is connected to the first housing 4 by a bearing structure. The cam 2 is fixedly connected to the drive shaft 32.

[0030] In the embodiments of the present application, the drive unit 31 is used to drive the drive shaft 32 to rotate, and the drive shaft 32 is used to drive the cam 2 to move under the drive of the drive unit 31; The other end of the drive shaft 32 is connected to the first housing 4 through a bearing structure to rotate the drive shaft 32 with respect to the first housing 4; Specifically, the drive shaft 32 is provided in a horizontal direction, and the cam 2 is mounted on the drive shaft 32, and the two sides of the cam 2 are respectively provided with matching bearing assemblies 33; Specifically, the bearing assembly 33 includes two snap springs and a bearing.

[0031] In the embodiments of the present application, the drive of the cam 2 is realized by inserting the drive assembly 3 into the drive unit 31 and the drive shaft 32 for driving the rotation of the cam 2 with a simple structure, which in turn simplifies the mechanical structure of the floor change of the cleaning device and thus reduces the manufacturing cost of the impeller mechanism.

[0032] In the specific embodiments of the present application, the drive unit 31 is drivingly connected to the drive shaft 32 via the coupling 34.

[0033] In the specific embodiments of the present application, the drive unit 31 may be a servo drive, and the servo drive is capable of precisely controlling the drive position or the drive angle; Preferably, the height difference between the impeller assembly 1 and the second housing 5 may be set to be minimal when the drive angle is 0°; the height difference between the impeller assembly 1 and the second housing 5 may be set to be maximal when the drive angle is 90°.

[0034] In the specific embodiments of the present application, the first housing 4 includes a servo drive mounting housing 41, and the servo drive is attached to the servo drive mounting housing 41.

[0035] In another specific embodiment of the present application, the cam 2 may be designed as a camshaft, wherein the drive unit 31 may directly drive the cam 2 to rotate.

[0036] As in Fig. 3, in the specific embodiments of the present application, the first housing 4 further includes a bearing holder 42, and the other end of the drive shaft 32 is connected to the bearing holder 42 via a bearing structure; Preferably, the bearing holder 42 is provided with a placement space for protecting the cam 2.

[0037] In another specific embodiment of the present application, the drive unit 31 may also be a drive motor.

[0038] As in Fig. 4, in the embodiments of the present application, the impeller assembly 1 comprises a contact pressure plate 11, a sliding bushing 12, an impeller mounting base 13 and an impeller 14, the impeller 14 being attached to the impeller mounting base 13, the sliding bushing 12 being slidably connected to the second housing 5, the sliding bushing 12 being connected to the impeller mounting base 13, the cam 2 being engaged with the contact pressure plate 11 and the contact pressure plate 11 being fixed to the sliding bushing 12.

[0039] In the embodiments of the present application, the contact pressure plate 11 is used to transmit the contact force of the cam 2 to the sliding bushing 12 and then to slide the sliding bushing 12 relative to the second housing 5.

[0040] In certain embodiments of the present application, the ground clearance of the cam 2 is greater than the ground clearance of the contact pressure plate 11. In the case where the ground clearance of the cam 2 is greater than the ground clearance of the contact pressure plate 11 and the cam 2 presses the contact pressure plate 11 towards the ground, the sliding bushing 12 slides with respect to the second housing 5, and the impeller assembly 1 moves in the direction away from the second housing 5, and thus the body of the cleaning device is moved in a direction away from the ground, lifting the cleaning device.

[0041] In the specific embodiments of the present application, one of the sliding bushing 12 and the second housing 5 is provided with a sliding block and the other with a sliding slot, and the sliding block is cooperatively connected to the sliding slot; specifically, the sliding block may be provided on the sliding bushing 12, and the sliding slot may be provided on the second housing 5; or the sliding block may be provided on the second housing 5, and the sliding slot may be provided on the sliding bushing 12.

[0042] In the specific embodiments of the present application, the contact pressure plate 11 is formed integrally with the sliding bushing 12.

[0043] In the specific embodiments of the present application, the mounting base for impeller 13 can be rotated relative to the sliding bushing 12, then the impeller 14 is a universal wheel at this time.

[0044] In another specific embodiment of the present application, the sliding bushing 12 can also be fixedly connected to the mounting base for impeller 13, then the impeller 14 is a directional wheel at this time.

[0045] In the embodiments of the present application, the contact pressure plate 11 and the sliding bushing 12 are provided in the impeller assembly 1, the cam 2 is butted with the contact pressure plate 11, and the sliding bushing 12 is slidably connected to the second housing 5 to realize the change in the level difference between the impeller assembly 1 and the second housing 5 with a simple structure, thereby avoiding the use of a complex structure such as a lead screw and thereby simplifying the mechanical structure of the floor change of the cleaning device and thereby reducing the manufacturing cost of the impeller mechanism.

[0046] In the embodiments of the present application, the impeller assembly 1 further comprises an elastic member 15, wherein one end of the elastic member 15 is fixedly connected to the contact pressure plate 11 and the other end of the elastic member 15 is fixedly connected to the second housing 5.

[0047] In the embodiments of the present application, the elastic element 15 is used to provide a restoring force when the impeller assembly 1 moves close to the first housing 4.

[0048] In the embodiments of the present application, by providing the elastic member 15 in the impeller assembly 1, the restoring force is provided in the case where the impeller assembly 1 moves close to the first housing 4, to prevent the cleaning device from relying only on its own gravity and to prevent mechanical wear during its own relapse, and to improve the reliability of the impeller mechanism and improve the reliability of the cleaning device.

[0049] As in Fig. 5, the contact pressure plate 11 in the embodiments of the present application is provided with an inclined surface 111 and a horizontal surface 112, wherein the inclined surface 111 is arranged adjacent to the horizontal surface 112 and the inclined surface 111 is higher than the horizontal surface 112.

[0050] In the specific embodiments of the present application, in the case where the cam 2 has collided with the inclined surface 111, the height difference between the impeller assembly 1 and the second housing 5 is a first height difference; in the case where the cam 2 has collided with the horizontal surface 112, the height difference between the impeller assembly 1 and the second housing 5 is a second height difference; it is predictable that the first height difference is smaller than the second height difference; since the impeller assembly 1 is always in contact with the ground, both the first height difference and the second height difference can be equal to the ground clearance of the floor of the cleaning device if the ground clearance of the impeller assembly 1 is set to zero. That is,in the case where the cam 2 is in contact with the inclined surface 111, the ground clearance of the bottom of the cleaning device is less than in the case where the cam 2 is in contact with the horizontal surface 112.

[0051] In the specific embodiments of the present application, the inclination surface 111 may be an inclined surface or an inclined curved surface.

[0052] In the embodiments of the present application, the inclined surface 111 is provided so that the height difference between the inclined surface 111 and the horizontal surface 112 is utilized to influence the change in the height difference between the impeller assembly 1 and the second housing 5, thereby avoiding the change in the height difference depending only on the change in the curvature of the cam 2 itself, and also reducing the effect of wear of the cam 2 leading to an erroneous change in the height difference, thereby improving the reliability of the impeller mechanism and thus also improving the reliability of the cleaning device.

[0053] As in Fig. 6, the cam 2 in the embodiments of the present application is provided with a contact roller 21, and the cam 2 is abutted with the contact pressure plate 11 via the contact roller 21.

[0054] In the embodiments of the present application, the contact roller 21 is provided to reduce friction during rotation of the cam 2, reduce wear on the surface of the cam 2, and thus improve the reliability of the cleaning device. Furthermore, the provision of the contact roller 21 can also reduce the driving force for driving the movement of the cam 2 on the contact pressure plate 11.

[0055] In the specific embodiments of the present application, the contact roller 21 is attached to the cam 2 by means of a wheel shaft 22.

[0056] In the embodiments of the present application, the cam 2 comprises a distal end remote from the drive shaft 32 and a proximal end adjacent to the drive shaft 32, wherein the contact roller 21 is provided at the distal end.

[0057] In the specific embodiments of the present application, the distal end of the cam 2 is a contact plane, and when the contact roller 21 moves to a preset position, the cam 2 collides with the horizontal surface 112 through the contact plane. By providing the contact plane at the distal end, it is possible to realize self-locking of the cam 2 when it is driven to a preset angle, thereby avoiding continuous drive force output and reducing energy loss of the cleaning device.

[0058] As in Fig. 7, in another specific embodiment of the present application, the cam 2 is collided with the contact pressure plate 11 by a curved surface of the cam 2.

[0059] In another specific embodiment of the present application, the curved surface of the cam 2 is directly abutted with the contact pressure plate 11, which makes it possible to reduce the size of the impeller mechanism, and at the same time, the force arm is shorter and reduces the load on the drive unit.

[0060] In another specific embodiment of the present application, in the case where the cam 2 is collided with the contact pressure plate 11 by the curved surface of the cam 2, the contact pressure plate 11 may have only one horizontal surface 112, thereby further reducing the size of the impeller mechanism.

[0061] In another specific embodiment of the present application, in the case where the cam 2 has collided with the contact pressure plate 11 via the curved surface of the cam 2, the contact pressure plate 11 has and only has a horizontal surface 112, and the distal end of the cam 2 has collided with the contact pressure plate 11, the height difference between the impeller assembly 1 and the second housing 5 is a third height difference; in the case where the cam 2 has collided with the contact pressure plate 11 via the curved surface of the cam 2, the contact pressure plate 11 has and only has a horizontal surface 112, and the proximal end of the cam 2 has collided with the contact pressure plate 11, the height difference between the impeller assembly 1 and the second housing 5 is a fourth height difference; the third height difference is greater than the fourth height difference.

[0062] In another specific embodiment of the present application, in the case where the cam 2 collides with the contact pressure plate 11 through the curved surface of the cam 2, the contact pressure plate 11 may also be provided with an inclined surface 111 and a horizontal surface 112.

[0063] As in Fig. 8, in the embodiments of the present application, the impeller mounting base 13 is provided with a universal rotary shaft 131, a rotary shaft mounting hole 121 is provided in the slide bushing 12, and the impeller mounting base 13 is rotatably connected to the slide bushing 12 through the universal rotary shaft 131 and the rotary shaft mounting hole 121.

[0064] In the specific embodiments of the present application, the mounting hole for rotary shaft 121 is provided along the height direction.

[0065] In the embodiments of the present application, by rotatably connecting the impeller mounting base 13 to the slide bushing 12 via the universal rotary shaft 131 and the rotary shaft mounting hole 121, it is possible to achieve the rotation of the impeller 14 relative to the first housing 4 and thus the universal rotation of the impeller 14, improve the reliability of the impeller mechanism, and improve the flexibility of movement of the cleaning device.

[0066] In the specific embodiments of the present application, the sliding bushing 12 comprises a sliding part and a fixing part, and the height of the sliding part relative to the ground is higher than the height of the fixing part relative to the ground; the sliding part is fixedly connected to the fixing part via a fixing member, and the fixing member is used for connection to the impeller mounting base 13; preferably, the fixing member is a screw.

[0067] In the specific embodiments of the present application, the fixing part includes a mounting hole for rotary shaft 121 and at least one fixing hole, and the sliding part is fixed to the fixing part through at least one fixing hole.

[0068] In the embodiments of the present application, an anti-loosening locking structure 122 is provided in the mounting hole for rotary shaft 121, wherein the mounting hole for rotary shaft 121 is plugged outside the universal rotary shaft 131, wherein the anti-loosening locking structure 122 is locked to the universal rotary shaft 131.

[0069] In the embodiments of the present application, by providing the anti-detachment locking structure 122 within the rotary shaft mounting hole 121, the universal rotary shaft 131 is prevented from being detachable from the connection with the rotary shaft mounting hole 121, which in turn improves the reliability of the impeller mechanism and the reliability of the cleaning device.

[0070] The specific operating principle of the impeller mechanism in the embodiments of the present application is described below: Normal operating state of the cleaning device: In the case where the drive angle of the drive unit 31 (servo drive) is a first preset angle, and in the case where the contact roller 21 has collided with the contact pressure plate 11, the contact roller 21 at the distal end of the cam 2 has collided with the inclined surface 111 of the contact pressure plate 11; in the case where the curved surface of the cam 2 has directly collided with the contact pressure plate 11 and the contact pressure plate 11 has one and only one horizontal surface 112, the proximal end of the cam 2 has collided with the contact pressure plate 11; At this time, the height difference between the impeller assembly 1 and the second housing 5 is minimized to facilitate balance as well as normal operation of the cleaning device; Preferably, the first predetermined angle is 0°.

[0071] Floor Lifting State of the Cleaning Device: When the drive angle of the drive unit 31 (servo drive) is the second predetermined angle, and the contact roller 21 abuts the contact pressure plate 11, the contact plane of the distal end of the cam 2 abuts the horizontal surface 112 of the contact pressure plate 11; When the curved surface of the cam 2 directly abuts the contact pressure plate 11 and the contact pressure plate 11 has one and only one horizontal surface 112, the distal end of the cam 2 abuts the contact pressure plate 11; At this time, the height difference between the impeller assembly 1 and the second housing 5 is the largest to facilitate the cleaning device's crossing of obstacles or other scenarios where floor lifting is required; Preferably, the second predetermined angle is 90°;In particular, the transition from the normal operating state to the state of raising the ground consists in the cam 2 pushing the contact pressure plate 11 downwards towards the ground.;

[0072] Furthermore, the height difference between the impeller assembly 1 and the second housing 5 can be adjusted even in the case where the drive angle of the drive unit 31 (servo drive) is a third preset angle, the third preset angle being between the first preset angle and the second preset angle, to realize that the cleaning device can perform floor lifting at different heights based on the different drive angle of the drive unit 31; preferably 0° < third preset angle < 90°.

[0073] The impeller mechanism in the embodiments of the present application has the following advantageous effects: The drive assembly 3 is fixedly connected to the first housing 4, and the cam 2 is collided with the impeller assembly 1, and the impeller assembly 1 is slidably connected to the second housing 5 in the height direction, so that the cam 2 can be rotated under the drive of the drive assembly 3, and the impeller assembly 1 slides with respect to the second housing 5 under the action of the contact force, so that the height difference between the impeller assembly 1 and the second housing 5 is changed, and thus the distance between the body of the cleaning device and the ground is changed to meet the requirements of different working scenarios of the cleaning device, that is, the flexibility of the impeller mechanism is improved, and the working flexibility of the cleaning device is improved.

[0074] The change in the height difference between the impeller assembly 1 and the second housing 5 can be achieved by adjusting the cam 2 and the drive assembly 3, thereby avoiding the use of a complex structure such as a lead screw and thereby simplifying the mechanical structure of the floor change of the cleaning device and thereby reducing the manufacturing cost of the impeller mechanism.

[0075] In the embodiments of the present application, a cleaning device is also provided, wherein the cleaning device comprises the impeller mechanism, the first housing 4 and the second housing 5 in the embodiments of the present application.

[0076] In the specific embodiments of the present application, the cleaning device may be a sweeper or a robot vacuum cleaner, and other cleaning devices. The above description has sufficiently disclosed the specific embodiments of the present application. It should be noted that modifications made by a person skilled in the art to the specific embodiments of the present application do not deviate from the scope of the claims of the present application. Accordingly, the scope of the claims of the present application is not limited to the above specific embodiments. Reference symbol

[0077] 1. Idler wheel assembly, 11. Contact pressure plate, 111. Inclining surface, 112. Horizontal surface, 12. Slide bushing, 121. Rotary shaft mounting hole, 122. Anti-loose lock structure, 13. Idler wheel mounting base, 131. Universal rotary shaft, 14. Idler wheel, 15. Elastic element, 2. Cam, 21. Contact roller, 22. Slide wheel shaft, 3. Drive assembly, 31. Drive unit, 32. Drive shaft, 33. Bearing assembly, 34. Coupling, 4. First casing, 41. Servo drive mounting casing, 42. Bearing bracket, 5. Second casing. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CH 202421396452.1

[0001]

Claims

[1] Impeller mechanism, characterized by in that it comprises an impeller assembly (1), a cam (2) and a drive assembly (3), wherein the drive assembly (3) is fixedly connected to a first housing (4) of a cleaning device, wherein the drive assembly (3) is drivingly connected to the cam (2), wherein the cam (2) is abutted with the impeller assembly (1), wherein the impeller assembly (1) is slidably connected to the second housing (5) of the cleaning device and the sliding direction runs in the height direction. [2] Impeller mechanism according to claim 1, characterized byin that the drive assembly (3) comprises a drive unit (31) and a drive shaft (32), wherein the drive unit (31) is fixedly connected to the first housing (4), wherein the drive unit (31) is drivingly connected to one end of the drive shaft (32), wherein the other end of the drive shaft (32) is connected to the first housing (4) by a bearing structure, wherein the cam (2) is fixedly connected to the drive shaft (32). [3] Impeller mechanism according to claim 1 or 2, characterized byin that the impeller assembly (1) comprises a contact pressure plate (11), a sliding bushing (12), an impeller mounting base (13) and an impeller (14), wherein the impeller (14) is attached to the impeller mounting base (13), wherein the sliding bushing (12) is slidably connected to the second housing (5), wherein the sliding bushing (12) is connected to the impeller mounting base (13), wherein the cam (2) is abutted with the contact pressure plate (11) and the contact pressure plate (11) is fastened to the sliding bushing (12). [4] Impeller mechanism according to claim 3, characterized by that the impeller assembly (1) further comprises an elastic element (15), wherein one end of the elastic element (15) is connected to the contact pressure plate (11) and the other end of the elastic element (15) is connected to the second housing (5). [5] Impeller mechanism according to claim 3, characterized bythat the contact pressure plate (11) is provided with an inclined surface (111) and a horizontal surface (112), wherein the inclined surface (111) is arranged next to the horizontal surface (112) and the inclined surface (111) is higher than the horizontal surface (112). [6] Impeller mechanism according to claim 5, characterized by that the cam (2) is provided with a contact roller (21), wherein the cam (2) is collided with the contact pressure plate (11) by the contact roller (21). [7] Impeller mechanism according to claim 6, characterized by that the cam (2) comprises a distal end remote from the drive shaft (32) and a proximal end adjacent to the drive shaft (32), wherein the contact roller (21) is provided at the distal end. [8] Impeller mechanism according to claim 3, characterized by that the cam (2) has collided with the contact pressure plate (11) through a curved surface of the cam (2). [9] Impeller mechanism according to claim 3, characterized by in that the impeller mounting base (13) is provided with a universal rotary shaft (131), wherein a rotary shaft mounting hole (121) is provided in the sliding bushing (12), wherein the impeller mounting base (13) is rotatably connected to the sliding bushing (12) through the universal rotary shaft (131) and the rotary shaft mounting hole (121). [10] Impeller mechanism according to claim 9, characterized by that an anti-loosening locking structure (122) is provided in the mounting hole for the rotary shaft (121), the mounting hole for the rotary shaft (121) being fitted outside the universal rotary shaft (131), the anti-loosening locking structure (122) being locked to the universal rotary shaft (131). [11] Cleaning device, characterized by that it comprises an impeller mechanism, a first housing (4) and a second housing (5) according to one of claims 1 to 10.

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