Pneumatic mechanism, lifting device and sweeper

Abstract

The utility model relates to the technical field of sweeping machines, in particular to a pneumatic mechanism, a lifting device and a sweeping machine, the pneumatic mechanism comprises a shell and an inflation piece, the shell comprises a first half shell and a second half shell which are connected in a sliding mode, and the first half shell and the second half shell define a containing cavity; the first half shell and the second half shell can slide relatively in the first direction, the inflation part is arranged in the containing cavity and connected with the first half shell and the second half shell, the inflation part can drive the first half shell and the second half shell to get close to each other or get away from each other through inflation or deflation, and the pneumatic mechanism can be arranged between the rack and the driving assembly. The driving wheel and the rack are relatively far away for lifting, a large obstacle crossing space can be formed at the bottom of the rack, the driving wheel can form a large effective obstacle crossing height, the inflation part can buffer and absorb shock of the first half shell, the second half shell, the rack and the mounting frame, vibration of the rack and the driving assembly is reduced, movement is more stable, and the turnover risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sweeping machines, in particular to a pneumatic mechanism, a lifting device and a sweeping machine. Background Art

[0002] When cleaning a house, the sweeper needs to climb stairs. It can easily climb ordinary stairs, but it will stop when it encounters stairs of a certain height and cannot overcome the obstacle.

[0003] In the related art, the sweeping machine needs to be equipped with additional motors, multiple electric telescopic rods with rollers at the ends, and other accessories. When it is necessary to overcome obstacles, the electric telescopic rods are controlled by the motor to extend, lift the body of the sweeping machine, and cooperate with the sweeping machine's own drive wheels to overcome obstacles. However, multiple accessories such as the motor and multiple electric telescopic rods will increase the structural complexity and weight of the sweeping machine. Moreover, the sweeping machine will generate large vibrations when it is supported by multiple electric telescopic rods when overcoming obstacles, and it is prone to overturning. Utility Model Content

[0004] The purpose of the utility model is to provide a pneumatic mechanism, a lifting device and a sweeper, so as to solve the problem in the related art that the sweeper will stagnate and fail to overcome high steps.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a pneumatic mechanism capable of driving a first part to be connected and a second part to be connected to move relative to each other, the pneumatic mechanism comprising:

[0007] The housing comprises a first half shell and a second half shell that are slidably connected, the first half shell and the second half shell enclosing a receiving cavity, the first half shell and the second half shell being able to slide relative to each other in a first direction, the first half shell being used to connect to the first to-be-connected member, and the second half shell being used to connect to the second to-be-connected member;

[0008] An inflatable member is arranged in the accommodating cavity and is respectively connected to the first half shell and the second half shell. The inflatable member can be selectively connected to or disconnected from an external air source. The inflatable member has an inflated state and a deflated state. The inflatable member can drive the first half shell and the second half shell to move closer to or away from each other by inflation or deflation.

[0009] In one embodiment, one or more guide rods are provided on the first half shell, one end of the guide rod is fixedly connected to the first half shell, the other end of the guide rod is slidably connected to the second half shell, and the guide rod is extended along the first direction;

[0010] Wherein, when a plurality of guide rods are provided, the plurality of guide rods are arranged at intervals along the circumference of the shell.

[0011] In one embodiment, an extension portion is provided on the first half shell, the extension portion is provided in the accommodating cavity and extends along the first direction, and the extension portion is connected to the inflatable member.

[0012] In one embodiment, the inflatable member is an airbag, and a plurality of recessed portions are provided on the airbag, each of the recessed portions is provided along the circumference of the airbag, and the plurality of recessed portions are provided at intervals along the first direction; and / or,

[0013] The inflatable member is provided with a ventilation channel, the ventilation channel is used to be connected to an external air source, and the ventilation channel is provided at the connection position between the inflatable member and the second half shell.

[0014] In one embodiment, the first member to be connected and the second member to be connected are slidably connected, and the relative sliding direction of the first member to be connected and the second member to be connected intersects with the first direction. The pneumatic mechanism further comprises:

[0015] a first rotating member, the first rotating member being disposed on the first half shell, the first rotating member being used to connect with the first member to be connected, the first half shell being able to rotate relative to the first member to be connected via the first rotating member; and / or

[0016] The second rotating member is arranged on the second half shell, the second rotating member is used to connect with the second part to be connected, and the second half shell can rotate relative to the second part to be connected through the second rotating member.

[0017] In a second aspect, the utility model provides a lifting device, comprising:

[0018] frame;

[0019] A drive assembly includes a mounting frame and a drive wheel, wherein the drive wheel is rotatably mounted on the mounting frame, the mounting frame is mounted on the frame, a cantilever shaft is mounted on the mounting frame, and the cantilever shaft is rotatably connected to the frame;

[0020] In the pneumatic mechanism of any of the above schemes, the first half shell is connected to the frame, the second half shell is connected to the mounting bracket, and the inflatable member can drive the mounting bracket to swing around the cantilever axis relative to the frame by inflation or deflation.

[0021] In one embodiment, the frame is provided with a guide groove, the guide groove can be extended in the vertical direction, and the pneumatic mechanism and the driving assembly are arranged on both sides of the frame;

[0022] The pneumatic mechanism includes a second rotating member, which is inserted into the guide groove. One end of the second rotating member is connected to the second half shell, and the other end is connected to the mounting bracket.

[0023] In one embodiment, the guide groove is an oblique straight groove or an arc-shaped groove, and the guide groove has a first end and a second end. In the first direction, the distance between the first end of the guide groove and the first half shell is smaller than the distance between the second end of the guide groove and the first half shell; and / or,

[0024] The guide groove is a vertical straight groove.

[0025] In one embodiment, the lifting device further comprises an air pump, the air pump being arranged on the frame, the air pump having an air outlet and an air inlet, the air inlet being in communication with the external environment, and the inflatable member having a ventilation channel;

[0026] Wherein, the air outlet is connected to the ventilation channel through an air pipeline.

[0027] In a third aspect, the present invention provides a sweeping machine comprising the lifting device of any of the above solutions.

[0028] The beneficial effects of the utility model are:

[0029] The utility model provides a pneumatic mechanism, a lifting device, and a sweeper. By utilizing an inflatable member to inflate and deflate air, the first and second half shells are driven to slide closer or further apart relative to each other, thereby driving a frame and a drive assembly to swing relative to each other and move away from each other vertically, so that the drive wheel and the frame are relatively separated and lifted. A large obstacle clearance space is formed at the bottom of the frame, and the drive wheel can form a large effective obstacle clearance height, so that the drive wheel can directly climb over obstacles for obstacle clearance. Furthermore, the inflatable member can effectively buffer and dampen the first and second half shells and between the frame and the mounting frame, reducing vibration of the frame and the drive assembly, making movement smoother, facilitating coordination between the drive wheels, and reducing the risk of tipping. When the inflatable member is deflated, the volume of the inflatable member is reduced, and the inflatable member can drive the first and second half shells to slide closer relative to each other, thereby driving the frame and the drive assembly to move closer relative to each other, facilitating restoration of the original height and achieving smooth operation. The utility model has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the installation position of the pneumatic mechanism in the embodiment of the present utility model;

[0031] Figure 2 This is a schematic structural diagram of the lifting device in an embodiment of the present utility model;

[0032] Figure 3 This is a schematic structural diagram of the pneumatic mechanism in an embodiment of the present utility model;

[0033] Figure 4 Schematic diagram of the connection relationship between the pneumatic mechanism and the drive assembly in an embodiment of the present utility model.

[0034] In the picture:

[0035] 1. Pneumatic mechanism;

[0036] 11. Housing; 111. First half shell; 112. Second half shell; 113. Accommodating chamber; 114. Guide rod; 115. Extension portion;

[0037] 12. Inflatable member; 121. Recessed portion; 122. Ventilation channel;

[0038] 13. First rotating member; 14. Second rotating member;

[0039] 2. Frame; 21. Guide groove;

[0040] 3. Drive assembly; 31. Mounting frame; 32. Drive wheel; 33. Cantilever shaft. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0042] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0045] like Figures 1 to 3 As shown, the X direction in the figure is a schematic diagram of the first direction. An embodiment of the first aspect of the present utility model provides a pneumatic mechanism 1, which can drive the relative movement of a first part to be connected and a second part to be connected. The pneumatic mechanism 1 includes a housing 11 and an inflatable member 12. The housing 11 includes a first half shell 111 and a second half shell 112 that are slidably connected. The first half shell 111 and the second half shell 112 are arranged to form a receiving cavity 113. The first half shell 111 and the second half shell 112 can slide relative to each other along a first direction. The first half shell 111 is used to connect to the first part to be connected, and the first half shell 111 and the first part to be connected can move together. The second half shell 112 is used to connect to the second part to be connected, and the second half shell 112 and the second part to be connected can move together.

[0046] The inflatable part 12 is arranged in the accommodating cavity 113, and the inflatable part 12 is respectively connected to the first half shell 111 and the second half shell 112. The inflatable part 12 can be selectively connected or disconnected with the external air source. The inflatable part 12 has an inflated state and a deflated state. When the inflatable part 12 is in the inflated state, the volume of the inflatable part 12 increases, and the inflatable part 12 can drive the first half shell 111 and the second half shell 112 to slide relative to each other and move away, thereby driving the first to-be-connected part and the second to-be-connected part to move relative to each other and move away. When the inflatable piece 12 is in a deflated state, the volume of the inflatable piece 12 is reduced, and the inflatable piece 12 can drive the first half shell 111 and the second half shell 112 to slide relative to each other and approach each other, thereby driving the first to-be-connected piece and the second to-be-connected piece to move relative to each other and approach each other, and the inflatable piece 12 can be clamped between the first half shell 111 and the second half shell 112, to buffer and shock-absorbing the relative movement between the first half shell 111 and the second half shell 112 and the relative movement between the first to-be-connected piece and the second to-be-connected piece, so that the movement is smoother, the structure is simple, and the use is convenient. When the pneumatic mechanism 1 is applied between a rotatably connected frame and a drive assembly, it can push the drive assembly to swing relative to the frame so that the drive assembly approaches or moves away from the frame in the vertical direction.

[0047] like Figures 1 to 3 As shown, in some embodiments, one or more guide rods 114 are provided on the first half shell 111, one end of the guide rod 114 is fixedly connected to the first half shell 111, and the other end of the guide rod 114 is slidably connected to the second half shell 112, and the guide rod 114 is extended along the first direction so that the sliding direction of the guide rod 114 and the second half shell 112 is the same as the sliding direction of the first half shell 111 and the second half shell 112.

[0048] With this arrangement, when the inflatable member 12 is inflated or deflated, the first half shell 111 can be slidably connected to the second half shell 112 via the guide rod 114. The guide rod 114 can guide and limit the sliding movement of the first half shell 111 and the second half shell 112. Alternatively, the first half shell 111 and the second half shell 112 can also be slidably connected by their side walls contacting each other. The guide rod 114 can not only circumferentially limit the first half shell 111 and the second half shell 112, but also correct the sliding movement of the first half shell 111 and the second half shell 112 along the first direction, thereby improving the accuracy of the sliding direction of the first half shell 111 and the second half shell 112.

[0049] Among them, when multiple guide rods 114 are provided, the multiple guide rods 114 are arranged at intervals along the circumference of the shell 11, so that the guide rods 114 form multi-point guidance in the circumference of the shell 11, thereby improving the uniformity of the circumferential force on the first half shell 111 and the second half shell 112 and avoiding jamming.

[0050] In this embodiment, the connection between the guide rod 114 and the first half shell 111 can be, but is not limited to, welding, threaded connection, or clamping. Of course, the guide rod 114 and the first half shell 111 can also be an integrally formed structure. The second half shell 112 can be provided with a sleeve or a sliding hole, into which the guide rod 114 can extend and slide. The sleeve or sliding hole can be arranged along the circumference of the second half shell 112.

[0051] like Figures 2 to 3 As shown, in some embodiments, an extension portion 115 is provided on the first half shell 111, and the extension portion 115 is provided in the accommodating cavity 113 and extends along the first direction. The extension portion 115 is connected to the inflatable member 12. The extension portion 115 can support the inflatable component from the inner wall of the first half shell 111, and can reduce the original occupied length of the inflatable member 12 in the first direction after being deflated. When the inflatable member 12 is inflated again, under the condition of the same inflation amount, by providing the extension portion 115, the inflatable member 12 can quickly expand in the first direction, and the first half shell 111 and the second half shell 112 can quickly slide in response to the force of the inflatable member 12, and the pneumatic response of the pneumatic mechanism 1 is more timely and sensitive.

[0052] In this embodiment, the extension portion 115 can be, but is not limited to, a block structure, a frame structure or a cylindrical structure. The radial dimension of the extension portion 115 can be equal to or smaller than the inner diameter of the second half shell 112. Optionally, the radial dimension of the extension portion 115 can be equal to the inner diameter of the second half shell 112. The side wall of the extension portion 115 can contact the inner wall of the second half shell 112 and can slide relative to it. It can cooperate with the guide rod 114 to provide dual guidance for the relative sliding of the first half shell 111 and the second half shell 112, thereby improving the accuracy and stability of the sliding movement of the first half shell 111 and the second half shell 112.

[0053] The sidewall of the extension 115 may be provided with a groove, which may be an annular groove. One or more grooves may be spaced apart along the first direction. This can reduce the contact area between the extension 115 and the inner wall of the second half shell 112, thereby reducing friction. It can also provide multi-point support along the first direction to ensure sliding guidance performance. Optionally, the radial dimension of the extension 115 may be smaller than the inner diameter of the second half shell 112, that is, the sidewall of the extension 115 and the inner wall of the second half shell 112 may not contact each other, thereby reducing friction.

[0054] like Figures 2 to 3As shown, in some embodiments, the inflatable member 12 is an airbag, and a plurality of recessed portions 121 are provided on the airbag. Each recessed portion 121 is arranged along the circumference of the airbag, and the plurality of recessed portions 121 are arranged at intervals along the first direction so that the side wall cross-section of the airbag forms a wave shape. The recessed portions 121 can pre-position the contraction and bending position of the airbag so that the airbag can deform regularly when deflated, thereby improving the force stability of the inflatable member 12 on the first half shell 111 and the second half shell 112, and also making the movement of the first half shell 111 and the second half shell 112 more stable.

[0055] In this embodiment, the inflatable member 12 is made of an elastic material, such as rubber or silicone, and has good elastic deformation performance.

[0056] like Figures 2 to 3 As shown, in some embodiments, a ventilation channel 122 is provided on the inflatable member 12, and the ventilation channel 122 is used to connect to an external air source. The ventilation channel 122 is provided at the connection position of the inflatable member 12 and the second half shell 112. With such a configuration, the connection position of the inflatable member 12 and the second half shell 112 is relatively fixed, and the ventilation channel 122 can be passed through and connected to the second half shell 112 to facilitate the connection of a pipeline for an external air source. The layout is convenient, which reduces the influence of the layout of the ventilation channel 122 on the inflation and deflation process of the inflatable member 12.

[0057] In this embodiment, the ventilation channel 122 can be, but is not limited to, a quick-connect joint, a connecting pipe, or a hole, which can be connected to an external gas source and allow gas to flow in and out.

[0058] like Figures 2 to 3 As shown, in some embodiments, the first and second members to be connected are slidably connected, the relative sliding direction of the first and second members to be connected intersects the first direction, and the sliding directions of the first and second members to be connected are different from the first direction. For example, the angle between the sliding directions of the first and second members to be connected and the first direction can be an acute angle, a right angle, or an obtuse angle. The sliding path of the first and second members to be connected is a straight line or a curve, so that they can be set according to the movement requirements of the second member to be connected.

[0059] Among them, the pneumatic mechanism 1 also includes a first rotating member 13, which is arranged on the first half shell 111. The first rotating member 13 is used to connect with the first part to be connected. The first half shell 111 can rotate relative to the first part to be connected through the first rotating member 13. When the first half shell 111 and the second half shell 112 slide relative to each other, the first rotating member 13 can enable the first half shell 111 to rotate flexibly relative to the first part to be connected, reducing the jamming of the relative movement of the first half shell 111 and the second half shell 112 and reducing stress concentration.

[0060] The pneumatic mechanism 1 also includes a second rotating member 14, which is arranged on the second half shell 112. The second rotating member 14 is used to connect with the second part to be connected. The second half shell 112 can rotate relative to the second part to be connected through the second rotating member 14. When the first half shell 111 and the second half shell 112 slide relative to each other, the second rotating member 14 can enable the second half shell 112 to rotate flexibly relative to the second part to be connected, thereby reducing the jamming of the second half shell 112 and the first half shell 111 during relative movement and reducing stress concentration.

[0061] In this embodiment, the first rotating member 13 and the second rotating member 14 can be a rotating shaft, one end of which can be hinged and rotated with the corresponding first half shell 111 or second half shell 112, and the other end of the rotating shaft can be fixedly connected to the corresponding first to-be-connected member and the second to-be-connected member. Alternatively, the first rotating member 13 and the second rotating member 14 can also both include a bearing and a connecting shaft, the connecting shaft and the inner hole of the bearing are fixed, and the bearing and the connecting shaft can serve as the two connecting ends of the first rotating member 13 and the second rotating member 14, so that the first rotating member 13 and the second rotating member 14 can rotate themselves, and both ends of them can be fixedly connected to the corresponding structure. For example, the first rotating member 13 can include a bearing and a connecting shaft, the bearing can be fixedly connected to the first half shell 111, and the connecting shaft can be fixedly connected to the first to-be-connected member. The fixed connection between the connecting shaft and the inner hole of the bearing can enable the first half shell 111 and the first to-be-connected member to rotate flexibly.

[0062] like Figures 1 to 4 As shown, an embodiment of the second aspect of the present invention provides a lifting device, which includes a frame 2, a drive assembly 3 and the pneumatic mechanism 1 in any of the above-mentioned schemes. The first part to be connected can be configured as the frame 2, and the second part to be connected can be configured as the drive assembly 3. The drive assembly 3 includes a mounting frame 31 and a drive wheel 32. The drive wheel 32 can be rotatably set on the mounting frame 31. The mounting frame 31 is set on the frame 2. A cantilever shaft 33 is provided on the mounting frame 31, and the cantilever shaft 33 is rotatably connected to the frame 2. The first half shell 111 is connected to the frame 2, and the second half shell 112 is connected to the mounting frame 31. The inflatable piece 12 can drive the mounting frame 31 to swing relative to the frame 2 around the cantilever shaft 33 by inflation or deflation, that is, the driving assembly 3 as a whole is mounted on the frame 2 in a cantilever manner through the cantilever shaft 33. The pneumatic mechanism 1 can serve as a driving structure and is arranged at a position of the mounting frame 31 away from the cantilever shaft 33, and the pneumatic mechanism 1 is respectively connected to the frame 2 and the mounting frame 31. The inflatable piece 12 can drive the first half shell 111 and the second half shell 112 to move away from or approach each other by inflation or deflation, thereby driving the driving assembly 3 as a whole to swing relative to the frame 2 around the axis of the cantilever shaft 33.

[0063] With such arrangement, when the inflatable piece 12 is in the inflated state, the volume of the inflatable piece 12 increases, and the inflatable piece 12 can drive the first half shell 111 and the second half shell 112 to slide relative to each other and move away, thereby driving the frame 2 and the drive assembly 3 to move relative to each other and move away in the vertical direction, so that the driving wheel 32 is relatively away from the frame 2 and lifted, and a larger obstacle-crossing space can be formed at the bottom of the frame 2, and the driving wheel 32 can form a larger effective obstacle-crossing height, so that the driving wheel 32 can directly climb over the obstacle to perform the obstacle-crossing operation, and the inflatable piece 12 can provide good buffering and shock absorption between the first half shell 111 and the second half shell 112 and the frame 2 and the mounting frame 31, thereby reducing the vibration of the frame 2 and the drive assembly 3, making the movement smoother, and facilitating the coordination between the driving wheels 32 to reduce the risk of tipping over. When the inflatable member 12 is in a deflated state, the volume of the inflatable member 12 is reduced, and the inflatable member 12 can drive the first half shell 111 and the second half shell 112 to slide relative to each other and approach each other, thereby driving the frame 2 and the drive assembly 3 to move relative to each other and approach each other, so as to facilitate the restoration of the original height and smooth operation. The structure is simple and easy to use, and solves the problem in the related art that the sweeper will stagnate and fail to overcome obstacles when encountering high steps.

[0064] In this embodiment, the pneumatic mechanism 1 and the mounting frame 31 can be located on the same side of the frame 2, or can be located on the inner and outer sides of the frame 2, depending on actual needs, as long as the mounting frame 31 can swing relative to the frame 2. A driving member for the driving wheel 32 can be disposed on the mounting frame 31, and the driving member can drive the driving wheel 32 to rotate.

[0065] like Figures 2 to 3 As shown, in some embodiments, the frame 2 is provided with a guide slot 21, which can extend in a vertical direction, with a first direction intersecting the vertical direction, that is, the first direction and the vertical direction are different directions, so as to reduce the impact of the drive assembly 3 on the pneumatic mechanism 1 and disperse stress. For example, the first direction and the vertical direction can be perpendicular or the angle between them can be acute. The first half shell 111 is connected to the frame 2, and the second half shell 112 is connected to the mounting bracket 31. The pneumatic mechanism 1 and the drive assembly 3 are respectively arranged on the inner and outer sides of the frame 2. The pneumatic mechanism 1 includes a second rotating member 14, which is inserted into the guide slot 21. One end of the second rotating member 14 is connected to the second half shell 112, and the other end is connected to the mounting bracket 31.

[0066] With such an arrangement, the pneumatic mechanism 1 as a whole can be arranged inside the frame 2, thereby improving the aesthetics. The second rotating member 14 can connect the second half shell 112 and the mounting bracket 31, and the second rotating member 14 can slide smoothly in the guide groove 21, so that the mounting bracket 31 of the drive assembly 3 can swing relative to the frame 2 around the cantilever shaft 33 in the vertical direction. The guide groove 21 can guide and limit the lifting and lowering movement of the mounting bracket 31 and the second rotating member 14 to avoid excessive swinging.

[0067] The guide groove 21 is an oblique straight groove or an arc-shaped groove having a first end and a second end. In a first direction, the distance between the first end of the guide groove 21 and the first half shell 111 is less than the distance between the second end of the guide groove 21 and the first half shell 111. Thus, the guide groove 21 extends vertically and can be designed as an inclined groove with the first end closer to the first half shell 111 and the second end farther from the second half shell 112. This allows the guide groove 21 to gradually tilt and guide in accordance with the relative sliding direction of the first and second half shells 111, 112, and to accommodate the circumferential swinging of the second rotating member 14 about the cantilever axis 33. This reduces the contact force between the second rotating member 14 and the sidewalls of the guide groove 21, improves the smoothness of the sliding of the second rotating member 14 within the guide groove 21, and prevents jamming when the mounting frame 31 swings relative to the frame 2. Furthermore, when the drive wheel 32 is impacted during travel, the sidewalls of the guide groove 21 and the pneumatic mechanism 1 can jointly withstand the impact force, dissipating stress and improving motion stability.

[0068] Of course, in some other embodiments, the guide groove 21 may also be a vertical straight groove to facilitate the vertical lifting and lowering of the driving wheel 32 and reduce the displacement of the driving wheel 32 in the first direction.

[0069] In some embodiments, the lifting device further comprises an air pump, which is disposed on the frame 2. The air pump has an air outlet and an air inlet, the air inlet being in communication with the external environment, and the inflatable member 12 having a ventilation channel 122. The air outlet and the ventilation channel 122 are connected via an air pipeline. With such a configuration, when the inflatable member 12 needs to be inflated, gas from the external environment enters the air pump through the air inlet and is pressurized. The gas is then transported from the air outlet through the air pipeline and the ventilation channel 122 into the inflatable member 12, thereby inflating the inflatable member 12. When the inflatable member 12 needs to be deflated, the air pump operates, and the gas in the inflatable member 12 can be sucked out through the ventilation channel 122 and then discharged to the external environment via the air pipeline.

[0070] Optionally, the air pump may be a bidirectional air pump, which allows its piston or blades to move in two directions to achieve the functions of both inhaling and exhausting air.

[0071] Alternatively, a valve system may be provided between the air pump and the inflatable member 12 to switch the direction of gas flow, thereby achieving the functions of blowing and inhaling. For example, the air outlet of the air pump may be connected to the ventilation channel 122 via a first gas pipeline, on which a first switch valve is provided, and the air inlet is connected to the ventilation channel 122 via a second gas pipeline, on which a second switch valve is provided. When the inflatable member 12 needs to be inflated, the first switch valve may be opened. At this time, the second switch valve is closed, and the air pump operates to pressurize the external ambient gas. The pressurized gas at the air outlet of the air pump may be transported to the ventilation channel 122 via the first gas pipeline to inflate the inflatable member 12. The inflation speed may be adjusted by adjusting the flow area of the first switch valve. When the inflatable member 12 needs to be deflated, the second switch valve can be opened. At this time, the first switch valve is closed and the air pump works. Under the action of the suction force of the air pump, the gas in the inflatable member 12 can be quickly output to the air pump through the second gas pipeline, and then output to the external environment by the air pump.

[0072] Of course, in some other embodiments, the air outlet of the air pump can be connected to the ventilation channel 122 of the inflatable member 12 through two pipelines, and the same three-way reversing valve or four-way reversing valve can be set on the two pipelines to switch the air inlet and outlet directions of the inflatable member 12.

[0073] like Figures 1 to 3 As shown, an embodiment of the third aspect of the present invention provides a sweeper, including the lifting device of any of the above-mentioned schemes. When the sweeper encounters an obstacle at a high height, the drive assembly 3 can swing in the vertical direction relative to the frame 2 around the cantilever shaft 33 through the pneumatic mechanism 1, so that the drive wheel 32 is relatively far away from the frame 2 for lifting, and the bottom of the frame 2 can form a larger obstacle-crossing space, and the drive wheel 32 can form a larger effective obstacle-crossing height, so that the drive wheel 32 can directly climb the obstacle to perform the obstacle-crossing operation, and the inflatable part 12 can provide good buffering and shock absorption between the first half shell 111 and the second half shell 112 and the frame 2 and the mounting frame 31, thereby reducing the vibration of the frame 2 and the drive assembly 3, making the movement smoother, and the coordination between the various drive wheels 32 is convenient, thereby reducing the risk of overturning of the sweeper.

[0074] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pneumatic mechanism capable of driving a first part to be connected and a second part to be connected to move relative to each other, characterized in that: The pneumatic mechanism comprises: The housing (11) comprises a first half shell (111) and a second half shell (112) which are slidably connected to each other, wherein the first half shell (111) and the second half shell (112) enclose a receiving cavity (113), and the first half shell (111) and the second half shell (112) can slide relative to each other along a first direction, wherein the first half shell (111) is used to connect to the first part to be connected, and the second half shell (112) is used to connect to the second part to be connected; An inflatable member (12), the inflatable member (12) is arranged in the accommodating cavity (113), and the inflatable member (12) is respectively connected to the first half shell (111) and the second half shell (112), the inflatable member (12) can be selectively connected to or disconnected from an external air source, the inflatable member (12) has an inflated state and a deflated state, and the inflatable member (12) can drive the first half shell (111) and the second half shell (112) to move closer to or away from each other by inflation or deflation.

2. The pneumatic mechanism according to claim 1, characterized in that: One or more guide rods (114) are provided on the first half shell (111), one end of the guide rod (114) is fixedly connected to the first half shell (111), and the other end of the guide rod (114) is slidably connected to the second half shell (112), and the guide rod (114) is extended along the first direction; Wherein, when a plurality of guide rods (114) are provided, the plurality of guide rods (114) are arranged at intervals along the circumference of the housing (11).

3. The pneumatic mechanism according to claim 1, characterized in that: An extension portion (115) is provided on the first half shell (111), the extension portion (115) is arranged in the accommodating cavity (113) and extends along the first direction, and the extension portion (115) is connected to the inflatable member (12).

4. The pneumatic mechanism according to claim 1, characterized in that: The inflatable member (12) is an airbag, and a plurality of recessed portions (121) are provided on the airbag, each recessed portion (121) is provided along the circumference of the airbag, and the plurality of recessed portions (121) are provided at intervals along the first direction; and / or, A ventilation channel (122) is provided on the inflatable member (12), and the ventilation channel (122) is used to connect to an external air source. The ventilation channel (122) is provided at the connection position between the inflatable member (12) and the second half shell (112).

5. The pneumatic mechanism according to claim 1, characterized in that: The first part to be connected and the second part to be connected are slidably connected, and the relative sliding direction of the first part to be connected and the second part to be connected intersects with the first direction. The pneumatic mechanism (1) further includes: a first rotating member (13), the first rotating member (13) being arranged on the first half shell (111), the first rotating member (13) being used to connect with the first member to be connected, the first half shell (111) being able to rotate relative to the first member to be connected via the first rotating member (13); and / or, A second rotating member (14) is provided on the second half shell (112), the second rotating member (14) is used to connect with the second part to be connected, and the second half shell (112) can rotate relative to the second part to be connected through the second rotating member (14).

6. A lifting device, characterized in that: include: Rack (2); A drive assembly (3) includes a mounting frame (31) and a drive wheel (32), wherein the drive wheel (32) is rotatably mounted on the mounting frame (31), the mounting frame (31) is mounted on the frame (2), a cantilever shaft (33) is mounted on the mounting frame (31), and the cantilever shaft (33) is rotatably connected to the frame (2); The pneumatic mechanism (1) according to any one of claims 1 to 5, wherein the first half shell (111) is connected to the frame (2), the second half shell (112) is connected to the mounting frame (31), and the inflatable member (12) can drive the mounting frame (31) to swing around the cantilever shaft (33) relative to the frame (2) by inflation or deflation.

7. The lifting device according to claim 6, characterized in that: The frame (2) is provided with a guide groove (21), and the guide groove (21) can be extended in the vertical direction. The pneumatic mechanism (1) and the drive assembly (3) are respectively arranged on the inner and outer sides of the frame (2); The pneumatic mechanism (1) comprises a second rotating member (14), the second rotating member (14) being inserted into the guide groove (21), one end of the second rotating member (14) being connected to the second half shell (112), and the other end being connected to the mounting frame (31).

8. The lifting device according to claim 7, characterized in that: The guide groove (21) is an oblique straight groove or an arc-shaped groove, and the guide groove (21) has a first end and a second end. In the first direction, the distance between the first end of the guide groove (21) and the first half shell (111) is smaller than the distance between the second end of the guide groove (21) and the first half shell (111); and / or, The guide groove (21) is a vertical straight groove.

9. The lifting device according to claim 6, characterized in that: The lifting device further comprises an air pump, the air pump being arranged on the frame (2), the air pump having an air outlet and an air inlet, the air inlet being in communication with the external environment, and the inflatable member (12) having an air vent (122); Wherein, the air outlet is connected to the ventilation channel (122) via a gas pipeline.

10. A sweeping machine, characterized in that: The lifting device comprises the lifting device according to any one of claims 6 to 9.

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