Lifting assembly and cleaning device

Abstract

The utility model relates to cleaning equipment technical field, specifically disclose a kind of lifting assembly and cleaning equipment, lifting assembly is formed by setting upper lifting arm, lower lifting arm, first support and second support parallelogram mechanism, one of upper lifting arm and lower lifting arm is rotated by cable, the other of upper lifting arm and lower lifting arm is rotated synchronously, so that second support can be lifted and descended under the joint action of upper lifting arm and lower lifting arm, and can always keep parallel with ground, further side brush assembly is parallel with ground, and the angle fluctuation of side brush assembly cannot be caused due to ground undulation etc., further improve cleaning or cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and in particular to a lifting component and a cleaning device. Background Technology

[0002] Cleaning equipment uses side brushes on its cleaning unit to sweep or clean target areas. During operation, the side brushes need to have a lifting function to meet the needs of different scenarios. In related technologies, the lifting and lowering of the side brushes is achieved through springs and locking mechanisms. However, the angle between the side brush and the ground changes after lifting and lowering. Furthermore, when the side brush is cleaning the ground, the undulations of the ground will cause slight changes in the angle of the side brush, resulting in some brush bristles not being able to fully contact the ground, thus reducing the cleaning effect. Utility Model Content

[0003] The purpose of this invention is to provide a lifting component and a cleaning device that ensures the side brush remains parallel to the ground in both lifting and lowering states, and that the angle of the side brush does not change with the undulations of the ground.

[0004] This utility model provides a lifting assembly, including:

[0005] First support and second support;

[0006] The upper lifting arm and the lower lifting arm are respectively hinged to the first bracket and the second bracket at both ends, and the upper lifting arm and the lower lifting arm are arranged parallel to each other.

[0007] A limiting member is installed on one of the first bracket and the second bracket. One end of the limiting member is hinged to the upper lifting arm or the lower lifting arm. The limiting member is used to limit the rotation angle of the upper lifting arm.

[0008] As a preferred technical solution for the lifting assembly, the limiting component includes a limiting movable shaft, a screw, and a nut. The limiting movable shaft is rotatably connected to the first bracket. The screw passes through the limiting movable shaft and is slidable relative to the limiting movable shaft. One end of the screw is hinged to the upper lifting arm, and the nut is threadedly connected to the other end of the screw.

[0009] As a preferred technical solution for the lifting assembly, the upper lifting arm is provided with an upper arm hinge lug, which extends toward the upper lifting arm away from the lower lifting arm, and one end of the screw is hinged to the upper arm hinge lug.

[0010] As a preferred technical solution for the lifting assembly, it also includes a control element, which is mounted on the first bracket, and the output end of the control element is hinged to one of the upper lifting arm and the lower lifting arm.

[0011] As a preferred technical solution for the lifting assembly, the control element is a cable, the cable is provided with a cable movable shaft, the cable movable shaft is rotatably connected to the first bracket, the limiting movable shaft is located above the cable movable shaft, and the output end of the cable is hinged to the upper arm hinge lug.

[0012] As a preferred technical solution for the lifting assembly, the screw is arranged parallel to the output end of the cable.

[0013] As a preferred technical solution for the lifting assembly, it also includes an unfolding connector, which is rotatably connected to the first bracket, and the unfolding connector has a mounting portion for detachable connection with the frame.

[0014] As a preferred technical solution for the lifting assembly, the first bracket extends toward the unfolding connector and forms two baffles spaced apart in the vertical direction. Each of the two baffles is provided with an unfolding shaft hole, and the two unfolding shaft holes are aligned. The unfolding connector is located between the two baffles, and the two ends of the rotating shaft of the unfolding connector are respectively rotatably engaged with the unfolding shaft hole.

[0015] As a preferred technical solution for the lifting assembly, the first bracket is further provided with a spring connecting lug, and the lifting assembly also includes an elastic element. One end of the elastic element is used to be hinged to the frame, and the other end of the elastic element is hinged to the spring connecting lug. When the first bracket rotates relative to the frame, the elastic element undergoes elastic deformation.

[0016] This utility model provides a cleaning device, including a lifting component of any of the above-described solutions.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model provides a lifting component, which forms a parallelogram mechanism by setting up an upper lifting arm, a lower lifting arm, a first bracket, and a second bracket. One of the upper and lower lifting arms is driven to rotate by a cable, and the other of the upper and lower lifting arms rotates synchronously. Thus, the second bracket can be raised and lowered under the combined action of the upper and lower lifting arms, and can always remain parallel to the ground. As a result, the side brush component is parallel to the ground and the angle of the side brush component will not fluctuate due to ground undulations, thereby further improving the sweeping or cleaning effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cleaning device in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the driving component in an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the side brush assembly and the lifting assembly in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the lifting assembly in the embodiment of this utility model from a first-view perspective;

[0023] Figure 5 This is a schematic diagram of the lifting assembly in an embodiment of the present invention from a second perspective;

[0024] Figure 6 This is a schematic diagram of the structure of the first bracket in an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the double-headed swing arm in an embodiment of this utility model.

[0026] In the picture:

[0027] 100. Side brush component;

[0028] 1. Frame; 11. First connecting part; 12. Spring mounting seat; 13. Clamping plate; 2. Drive component; 3. Double-headed swing arm; 31. First swing section; 32. Second swing section; 33. Drive extension section; 34. Center hole; 35. Drive connection hole; 36. First cable connection hole; 37. Second cable connection hole; 4. Cable; 41. Cable movable shaft; 5. Gas spring; 6. Spreading and closing connecting part; 61. Second connecting part; 7. First bracket; 71. Spring connecting ear; 72. Baffle; 73. Spreading and closing shaft hole; 74. Upper hinge hole; 75. Lower hinge hole; 76. Limiting hinge hole; 77. Adjusting hinge hole; 81. Upper lifting arm; 811. Upper arm hinge ear; 82. Lower lifting arm; 83. Second bracket; 84. Side brush motor seat; 9. Limiting part; 91. Limiting movable shaft. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] like Figures 1-7As shown, this utility model provides a cleaning device applied to cleaning equipment, which can be a sweeping robot, a mopping robot, a sweeping and mopping robot, a self-propelled sweeping vehicle, or a self-propelled cleaning vehicle. The cleaning device includes a frame 1, a drive assembly, a lifting assembly, an elastic element, and a side brush assembly 100. The frame 1 extends along the width and height directions of the cleaning equipment. The drive assembly is mounted on the frame 1 and includes a drive element 2 and a cable 4. The drive element 2 drives the cable 4 to extend and retract. As prior art in the field, the cable 4 includes a sleeve and a steel wire rope, which can slide within the sleeve to drive the movement of related actuators. The lifting assembly includes a first bracket 7, a second bracket 83, and a lifting arm. The first bracket 7 is rotatably connected to one end of the frame 1, and the two ends of the lifting arm are hinged to the first bracket 7 and the second bracket 83, respectively. The cable 4 is connected to the lifting arm and is used to drive the lifting arm to rotate, thereby driving the second bracket 83 to rise and fall. The two ends of the elastic element are respectively connected to the frame 1 and the first support 7. When the first support 7 rotates relative to the frame 1, the elastic element undergoes elastic deformation. The side brush assembly 100 is mounted on the second support 83 and is used to sweep or clean the ground. In this embodiment, the cleaning device ensures that the side brush assembly 100 remains parallel to the ground after lifting by setting the lifting assembly as a hinged structure formed by the first support 7, the second support 83, and the lifting arm, thereby ensuring the working area of ​​the side brush assembly 100. At the same time, the elastic element connects the first support 7 and the frame 1. When passing over an obstacle, the first support 7 rotates relative to the frame 1 while the elastic element undergoes elastic deformation, so that the side brush assembly 100 always keeps close to the obstacle for cleaning, avoiding leaving any dead corners near the obstacle.

[0034] Furthermore, two of each of the following components are provided: cable 4, lifting assembly, elastic element, and side brush assembly 100. The drive assembly also includes a double-headed swing arm 3, which is rotatably connected to the frame 1. A drive unit 2 drives the double-headed swing arm 3 to rotate. The input ends of the two cables 4 are respectively connected to both ends of the double-headed swing arm 3, allowing one drive unit 2 to simultaneously drive both cables 4, thereby causing the two side brush assemblies 100 to rise and fall simultaneously. This reduces costs and space requirements, resulting in a smaller overall size.

[0035] Specifically, such as Figure 7As shown, the double-headed swing arm 3 includes a first swing segment 31 and a second swing segment 32, both of equal length and extending in the same direction. A central hole 34 is provided between the first swing segment 31 and the second swing segment 32. A first cable connection hole 36 is provided at the end of the first swing segment 31 away from the central hole 34, and a second cable connection hole 37 is provided at the end of the second swing segment 32 away from the central hole 34. The distance between the first cable connection hole 36 and the central hole 34 is equal to the distance between the second cable connection hole 37 and the central hole 34. The driving member 2 is used to drive the double-headed swing arm 3 to rotate around the axis of the central hole 34. Both cables 4 are mounted on the frame 1, and the input ends of the two cables 4 are respectively connected to the first cable connection hole 36 and the second cable connection hole 37. When the drive component 2 drives the double-headed swing arm 3 to rotate, the two cables 4 extend and retract simultaneously under the drive of the double-headed swing arm 3, and the extension and retraction lengths are equal, thereby realizing that the two side brush components 100 rise and fall at the same time and the distance of rise and fall is equal, ensuring the cleaning effect.

[0036] Further, please refer to Figure 2 As shown, a clamping plate 13 is provided on the frame 1, and the cable 4 is installed on the clamping plate 13. Specifically, the sleeve or connector of the cable 4 is clamped on the clamping plate 13 or connected to the clamping plate 13 by thread, so that the position of the sleeve of the cable 4 relative to the frame 1 remains unchanged, and the lifting component can be precisely controlled to rise and fall when the wire rope of the cable 4 extends and retracts.

[0037] Specifically, in this embodiment, the driving component 2 is an electric actuator, which is arranged on the same side of the frame 1 as the double-headed swing arm 3, thus satisfying the arrangement of the driving component 2 within a limited space. The corresponding double-headed swing arm 3 also includes a driving extension section 33, which is connected to the first swing section 31 or the second swing section 32. The output end of the electric actuator is connected to the driving extension section 33. The driving extension section 33 is provided with a driving connection hole 35, and the output end of the electric actuator is hinged in the driving connection hole 35. When the output end of the electric actuator extends or retracts, it drives the double-headed swing arm 3 to rotate around the axis of the central hole 34, thereby driving the two cables 4 to extend and retract synchronously. To further improve the accuracy of transmission, a floating joint (not shown in the figure) is provided between the output end of the electric actuator and the driving extension section 33. The output end of the electric actuator and the driving extension section 33 are connected through the floating joint. The specific structure of the floating joint and its connection method are prior art in this field and will not be described in detail here.

[0038] Alternatively, in other embodiments, the drive component 2 can also be a right-angle geared motor. The right-angle geared motor and the double-headed swing arm 3 are arranged on the same side of the frame 1, thus satisfying the arrangement of the drive component 2 within a limited space. The central hole 34 of the double-headed swing arm 3 is fixedly sleeved on the output shaft of the right-angle geared motor, which can also drive the double-headed swing arm 3 to rotate around the central hole 34. The right-angle geared motor can be a bevel gear type or a worm gear type; the specific selection depends on actual needs and is not specifically limited here.

[0039] Optionally, the first cable connection hole 36 and the second cable connection hole 37 can be circular holes or oblong holes. In this embodiment, both the first cable connection hole 36 and the second cable connection hole 37 are circular holes, and the input ends of the two cables 4 are respectively hinged to the first cable connection hole 36 and the second cable connection hole 37. In other embodiments, the first cable connection hole 36 and the second cable connection hole 37 can also be oblong holes, and the lengths of the first cable connection hole 36 and the second cable connection hole 37 are equal. The first cable connection hole 36 extends along the length direction of the first swing segment 31, and the second cable connection hole 37 extends along the length direction of the second swing segment 32. The length direction of the first swing segment 31 is parallel to or coincides with the length direction of the second swing segment 32. Both the first cable connection hole 36 and the second cable connection hole 37 are set as elongated holes. When the double-headed swing arm 3 rotates, the input end of the second cable connection hole 37 slides in the elongated hole, ensuring that the movement direction of the wire rope of the cable 4 is consistent with the force direction, and avoiding uneven wear at the joint after long-term use, which would lead to a decrease in adjustment accuracy.

[0040] Furthermore, such as Figure 3-5As shown, the lifting arm includes an upper lifting arm 81 and a lower lifting arm 82, with both ends of the upper lifting arm 81 and the lower lifting arm 82 hinged to a first bracket 7 and a second bracket 83, respectively. The upper lifting arm 81 and the lower lifting arm 82 are arranged parallel to each other. An operating element is mounted on the first bracket, and the output end of the operating element is hinged to one of the upper lifting arm 81 and the lower lifting arm 82. In this embodiment, the operating element is a cable 4, and the output end of the cable 4 is hinged to one of the upper lifting arm 81 and the lower lifting arm 82. The upper lifting arm 81, lower lifting arm 82, first bracket 7, and second bracket 83 together form a parallelogram mechanism. A cable 4 drives one of the upper lifting arms 81 and lower lifting arms 82 to rotate, while the other rotates synchronously. This allows the second bracket 83 to rise and fall under the combined action of the upper and lower lifting arms 81 and 82, maintaining parallelism with the ground. Consequently, the side brush assembly 100 remains parallel to the ground, preventing angular fluctuations due to ground undulations, further improving cleaning performance. In this embodiment, the first bracket 7 is rotatably connected to one end of the frame 1, with the axis of rotation between the first bracket 7 and the frame 1 in the vertical direction. The axes of rotation of the upper lifting arm 81 and lower lifting arm 82 relative to the first bracket 7 and second bracket 83 are in the horizontal direction. Therefore, the lifting and lowering of the side brush assembly 100 is achieved by the parallelogram structure formed by the upper lifting arm 81, the lower lifting arm 82, the first bracket 7 and the second bracket 83. The rotation of the first bracket 7 relative to the frame 1 enables the two side brush assemblies 100 to move away from or closer to each other, thus realizing the unfolding and closing of the side brush assembly 100.

[0041] Specifically, the cable 4 is equipped with a cable movable shaft 41, which is rotatably connected to the first bracket 7. The cable movable shaft 41 is fixedly connected to the sleeve or connector of the cable 4, and simultaneously rotatably connected to the first bracket 7. The rotation axis of the cable movable shaft 41 and the first bracket 7 is parallel to the rotation axis of the upper lifting arm 81 and the first bracket 7. When the cable 4 pulls the side brush assembly 100 up and down, the cable movable shaft 41 rotates relative to the first bracket 7, so that the movement direction of the steel wire rope at the output end of the cable 4 is consistent with the direction of force, avoiding uneven wear at the joint after long-term use, which would lead to a decrease in adjustment accuracy.

[0042] Furthermore, an upper arm hinge ear 811 is provided on the upper lifting arm 81. The upper arm hinge ear 811 extends towards the upper lifting arm 81 in a direction away from the lower lifting arm 82, that is, the upper arm hinge ear 811 extends above the upper lifting arm 81. The output end of the pull cable 4 is hinged to the upper arm hinge ear 811. By providing the upper arm hinge ear 811, more movement space is provided for the output end of the pull cable 4, avoiding motion interference during the adjustment of the side brush assembly 100's lifting and lowering process, which would prevent adjustment from being impossible.

[0043] Furthermore, a limiting member 9 is also installed on the first bracket 7. One end of the limiting member 9 is hinged to the upper arm hinge lug 811, and the limiting member 9 is used to limit the rotation angle of the upper lifting arm 81. By setting the limiting member 9 to limit the rotation angle of the upper lifting arm 81, the side brush assembly 100 is prevented from being too high or too low, and the adjustment range is also prevented from exceeding the limit, which could cause the mechanism to jam or interfere. In other embodiments, the limiting member 9 can also be connected to the lower lifting arm 82, which can also achieve the limiting effect.

[0044] Specifically, the limiting component 9 includes a limiting movable shaft 91, a screw, and a nut. The limiting movable shaft 91 is rotatably connected to the first bracket 7 and located above the cable movable shaft 41. The screw passes through the limiting movable shaft 91 and can slide relative to it. One end of the screw is hinged to the upper arm hinge lug 811, and the nut is threaded onto the other end of the screw. By screwing the nut into or out of the screw, the maximum angle of the upper lifting arm 81 is adjusted, thereby limiting the lowest position of the side brush assembly 100. The limiting movable shaft 91 is arranged parallel to the cable movable shaft 41. When the cable 4 drives the upper lifting arm 81 to rotate, the upper lifting arm 81 drives the screw to slide relative to the limiting movable shaft 91, and simultaneously drives the limiting movable shaft 91 to rotate relative to the first bracket 7, thus preventing the movement from jamming. In this embodiment, the screw is set parallel to the steel wire rope at the output end of the cable 4. It can be understood that the steel wire rope of the cable 4 is always taut, and it can be regarded as a rigid body. Setting the screw parallel to it further avoids motion interference.

[0045] Alternatively, please refer to Figures 1-5 As shown, the cleaning device also includes a unfolding connector 6, which is rotatably connected to the first support 7, allowing the first support 7 to rotate relative to the frame 1 via the unfolding connector 6. The end of the frame 1 is provided with a first connecting part 11, and the unfolding connector 6 is provided with a second connecting part 61. The first connecting part 11 and the second connecting part 61 are fixedly connected by bolts. By providing the unfolding connector 6, the lifting assembly and the frame 1 can be quickly assembled and disassembled, improving maintenance convenience. For the specific structure of the first support 7, please refer to [reference needed]. Figure 6As shown, the first bracket 7 extends vertically and is provided with a limiting hinge hole 76, an adjusting hinge hole 77, an upper hinge hole 74, a spring connecting lug 71, and a lower hinge hole 75 from top to bottom. The limiting movable shaft 91 is hinged in the limiting hinge hole 76, the cable movable shaft 41 is hinged in the adjusting hinge hole 77, one end of the upper lifting arm 81 is hinged in the upper hinge hole 74, and one end of the lower lifting arm 82 is hinged in the lower hinge hole 75. In this embodiment, the elastic element is preferably a gas spring 5. A spring mounting seat 12 is also provided on the frame 1. The two ends of the gas spring 5 are respectively hinged to the spring mounting seat 12 of the frame 1 and the spring connecting lug 71 of the first bracket 7 to avoid wear between the two ends of the gas spring 5 and the frame 1 and the first bracket 7. The first support 7 extends toward the unfolding connector 6 and forms two baffles 72 spaced apart in the vertical direction. Each baffle 72 has an unfolding shaft hole 73, which are aligned. The unfolding connector 6 is located between the two baffles 72, and both ends of the shaft of the unfolding connector 6 are rotatably engaged with the unfolding shaft holes 73, allowing relative rotation between the first support 7 and the unfolding connector 6, with the axis of rotation in the vertical direction.

[0046] Optionally, the cleaning device also includes a side brush motor mount 84, which is used to mount the side brush assembly 100. The side brush motor mount 84 is fixedly connected to the second bracket 83 by bolts. By setting the side brush motor mount 84, the lifting assembly and the side brush assembly 100 can be quickly disassembled and assembled, which helps to improve the convenience of maintenance.

[0047] This utility model provides a cleaning device, including the cleaning apparatus in this embodiment. The cleaning device can be a sweeping robot, a mopping robot, a sweeping and mopping robot, a self-propelled sweeping vehicle, or a self-propelled cleaning vehicle.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A lifting assembly, characterized in that, include: First support (7) and second support (83); The upper lifting arm (81) and the lower lifting arm (82) are respectively hinged to the first bracket (7) and the second bracket (83) at both ends. The upper lifting arm (81) and the lower lifting arm (82) are arranged in parallel. A limiting member (9) is installed on one of the first bracket (7) and the second bracket (83). One end of the limiting member (9) is hinged to the upper lifting arm (81) or the lower lifting arm (82). The limiting member (9) is used to limit the rotation angle of the upper lifting arm (81).

2. The lifting assembly according to claim 1, characterized in that, The limiting component (9) includes a limiting movable shaft (91), a screw and a nut. The limiting movable shaft (91) is rotatably connected to the first bracket (7). The screw passes through the limiting movable shaft (91) and can slide relative to the limiting movable shaft (91). One end of the screw is hinged to the upper lifting arm (81), and the nut is threaded to the other end of the screw.

3. The lifting assembly according to claim 2, characterized in that, The upper lifting arm (81) is provided with an upper arm hinge lug (811), which extends toward the upper lifting arm (81) away from the lower lifting arm (82), and one end of the screw is hinged to the upper arm hinge lug (811).

4. The lifting assembly according to claim 3, characterized in that, It also includes a control element mounted on the first bracket (7), the output end of which is hinged to one of the upper lifting arm (81) and the lower lifting arm (82).

5. The lifting assembly according to claim 4, characterized in that, The control element is a cable (4), which is provided with a cable movable shaft (41). The cable movable shaft (41) is rotatably connected to the first bracket (7). The limiting movable shaft (91) is located above the cable movable shaft (41). The output end of the cable (4) is hinged to the upper arm hinge lug (811).

6. The lifting assembly according to claim 5, characterized in that, The screw is arranged parallel to the output end of the cable (4).

7. The lifting assembly according to claim 1, characterized in that, It also includes a folding connector (6), which is rotatably connected to the first bracket (7), and the folding connector (6) has a mounting portion for detachable connection with the frame (1).

8. The lifting assembly according to claim 7, characterized in that, The first bracket (7) extends toward the unfolding connector (6) and forms two baffles (72) spaced apart in the vertical direction. Both baffles (72) are provided with unfolding shaft holes (73), and the two unfolding shaft holes (73) are aligned. The unfolding connector (6) is located between the two baffles (72), and the two ends of the rotating shaft of the unfolding connector (6) are respectively rotatably engaged with the unfolding shaft holes (73).

9. The lifting assembly according to claim 7, characterized in that, The first bracket (7) is also provided with a spring connecting ear (71). The lifting assembly also includes an elastic element. One end of the elastic element is used to be hinged to the frame (1), and the other end of the elastic element is hinged to the spring connecting ear (71). When the first bracket (7) rotates relative to the frame (1), the elastic element undergoes elastic deformation.

10. A cleaning device, characterized in that, Includes the lifting assembly as described in any one of claims 1-9.

Images