Lifting device and sweeper

Abstract

The utility model relates to the technical field of sweeping machines, in particular to a lifting device and a sweeping machine, and the lifting device comprises a support frame which is vertically provided with a screw rod; the mounting shell is arranged on the supporting frame in a liftable manner; an assembling cavity is formed in the mounting shell; the driving mechanism comprises a driving assembly, and a driving bevel gear, a driven lifting gear set and an output straight gear which are arranged in the assembling cavity; the driving bevel gear is arranged on a power output shaft of the driving assembly in a sleeving mode, the driven lifting gear set comprises a gear shaft, a lifting straight gear, a driving straight gear arranged on the outer side of the gear shaft in a sleeving mode and a driven bevel gear, the screw is slidably sleeved with the lifting straight gear, the lifting straight gear is meshed with the driving straight gear, and the driven bevel gear is meshed with the driving bevel gear; and the output straight gear is meshed with the driving bevel gear and is in driving connection with the sweeping part. The height of the sweeping part can be controlled according to different ground environments or carpets with different thicknesses, so that the sweeping part effectively contacts and sweeps the surface of the carpet or the ground, and the overall cleaning efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sweepers, and in particular to a lifting device and a sweeper. Background Technology

[0002] Currently, in some usage scenarios, such as when cleaning the top surface of carpets or encountering obstacles or uneven ground, the brushes are fixed at the bottom of the robot vacuum, which prevents it from rising to the specified height during sweeping. This makes it difficult to clean thick carpets and avoid obstacles or uneven ground, thus affecting the user experience. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a lifting device and a sweeping machine.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] In a first aspect, this utility model embodiment provides a lifting device, the lifting device comprising:

[0006] A support frame, wherein a screw is vertically mounted on the support frame;

[0007] The mounting housing is vertically and elliptically mounted on the support frame; an assembly cavity is formed inside the mounting housing.

[0008] The drive mechanism includes a drive assembly disposed on the outside of the mounting housing and an active helical gear, a driven lifting gear set, and an output spur gear built into the assembly cavity. The active helical gear is sleeved on the power output shaft of the drive assembly. The driven lifting gear set includes a gear shaft, a lifting spur gear, a drive spur gear and a driven helical gear sleeved on the outside of the gear shaft. The lifting spur gear is movably sleeved on the outside of the screw. The lifting spur gear meshes with the drive spur gear, and the driven helical gear meshes with the active helical gear. The output spur gear meshes with the active helical gear and is drivenly connected to the brush component.

[0009] In a preferred embodiment of this invention, the bottom surface of the driving spur gear meshes with the top surface of the driven helical gear.

[0010] As a preferred technical solution of this utility model, a first annular ratchet is provided on the side of the driven helical gear, and a second annular ratchet is provided on the side of the driving spur gear opposite to the driven helical gear, which cooperates with the first annular ratchet.

[0011] As a preferred technical solution of this utility model, the support frame is provided with an elastic element that pushes the second annular ratchet of the drive spur gear to move to engage with the first annular ratchet.

[0012] As a preferred technical solution of this utility model, the gear shaft is provided with a limiting step to restrict the movement range of the driving spur gear.

[0013] As a preferred technical solution of this utility model, the support frame is further provided with a guide rod, and the mounting shell is elliptical and movably mounted on the guide rod.

[0014] As a preferred technical solution of this utility model, a connecting part is provided on the outer side of the support frame, and the connecting part is used to assemble with the sweeper.

[0015] Secondly, this utility model embodiment also provides a sweeping machine, which is equipped with the lifting device described in any of the above embodiments.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] When the power output shaft of the drive component drives the active helical gear to rotate, it drives the driven helical gear to rotate. The driven helical gear drives the drive spur gear to rotate, which in turn drives the lifting spur gear to move upward and push the mounting housing upward, causing the brush to rise to the specified height. Since the output spur gear meshes with the active helical gear, the continuous rotation of the active helical gear drives the output spur gear to rotate, causing the brush mounted on the output spur gear to rotate at high speed. At this time, it can sweep the surface of the carpet or avoid obstacles or uneven ground. The height of the brush can be controlled according to different ground environments or carpets of different thicknesses, so that the brush can effectively contact and clean the carpet surface or floor, improving the overall cleaning efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an overall structural diagram of an embodiment of the present utility model.

[0020] Figure 2 This is a structural diagram of the drive mechanism according to an embodiment of the present utility model.

[0021] Figure 3 This is a structural diagram of the drive mechanism according to an embodiment of the present utility model.

[0022] Figure 4 This is a structural diagram of the drive mechanism according to an embodiment of the present utility model.

[0023] Figure 5 This is a structural diagram of the active gear assembly according to an embodiment of the present invention.

[0024] Figure 6 yes Figure 5 Exploded view of the structure.

[0025] Numbers in the diagram

[0026] 1. Support frame; 11. Screw;

[0027] 2. Mounting shell; 21. Assembly cavity;

[0028] 3. Drive mechanism; 31. Drive assembly; 32. Driven lifting gear set; 321. Gear shaft; 3211. Limiting step; 323. Driven helical gear; 3231. First annular ratchet; 324. Drive spur gear; 3241. Second annular ratchet; 33. Lifting spur gear; 34. Output spur gear; 35. Driven helical gear; 36. Guide rod; 37. Elastic element;

[0029] 4. Sweeping and brushing components. Detailed Implementation

[0030] To make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following describes this application in further detail with reference to the accompanying drawings and embodiments.

[0031] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0032] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0033] When a component is said to be "connected to" another component, it can be directly connected to the other component or indirectly connected to that other component.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and 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 application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0036] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0037] In order to solve the technical problem in the prior art that the height of the brush 4 cannot be adjusted because the brush 4 is fixed, making it difficult to clean thick carpets, obstacles, or uneven ground, this utility model provides a lifting device and a sweeping machine.

[0038] The following describes in detail the specific structure of a lifting device provided by an embodiment of this utility model, according to the appendix. Figure 1-6 As shown, the specific structure of the lifting device includes a support frame 1, a mounting shell 2, and a drive mechanism 3.

[0039] The support frame 1 is equipped with a vertically swinging screw 11. Specifically, one end of the screw 11 is connected to the top of the support frame 1, and the other end of the screw 11 is connected to the bottom of the support frame 1, so that the entire screw 11 is vertically swinging. When it is necessary to sweep the carpet, under the driving action of the drive mechanism 3, the mounting shell 2 moves up and down along the axis of the screw 11. Thus, the entire brush part 4 can be driven to rise and move according to the thickness of the carpet until the brush part 4 rises to the height that can sweep the top surface of the carpet. Conversely, when it is necessary to sweep the floor, the drive mechanism 3 drives the mounting shell 2 to move down along the axis of the screw 11 until the brush part 4 falls to the height that can sweep the floor.

[0040] When the support frame 1 is detachably installed on the equipment, it supports the entire lifting device. This arrangement ensures that the lifting device remains stable during operation, preventing it from tilting or collapsing and ensuring the safe operation of the entire equipment.

[0041] Understandably, the support frame 1 is detachably installed at the bottom of the sweeper, and the entire lifting device is driven by the support frame 1 when the sweeper is moving.

[0042] Mounting housing 2 can be raised and lowered on support frame 1.

[0043] Specifically, when encountering obstacles, uneven ground, or carpets with thicker brushes, the mounting shell 2 moves up and down within the support frame 1 under the driving action of the drive mechanism 3. When the mounting shell 2 moves up and down, the brush 4 moves in the same direction. Users do not need to manually adjust the height of the brush 4 of the sweeper to clean different ground environments or carpets of different thicknesses, thereby improving the convenience of use.

[0044] An assembly cavity 21 is formed inside the mounting housing 2. The drive mechanism 3 includes a drive assembly 31 disposed on the outside of the mounting housing 2, a driving helical gear 35, a driven lifting gear set 32 ​​and an output spur gear 34 built into the assembly cavity 21. The driving helical gear 35 is sleeved on the power output shaft of the drive assembly 31. The driven lifting gear set 32 ​​includes a gear shaft 321, a lifting spur gear 33, a driving spur gear 324 and a driven helical gear 323 sleeved on the outside of the gear shaft 321. The lifting spur gear 33 is movably sleeved on the outside of the screw 11. The lifting spur gear 33 meshes with the driving spur gear 324 and the driven helical gear 323 meshes with the driving helical gear 35. The output spur gear 34 meshes with the driving helical gear 35 and is drivenly connected to the brush component 4.

[0045] Specifically, in order to raise or lower the brush 4 to a specified height, a drive mechanism 3 is used to move the brush 4 up and down. For example, when brushing a thick carpet, the power output shaft of the drive assembly 31 rotates in the forward direction to drive the active helical gear 35 to rotate circumferentially. When the active helical gear 35 rotates, it meshes with the driven helical gear 323, thus pushing the driven helical gear 323 to rotate. When the driven helical gear 323 rotates, it drives the lifting spur gear 33 to rise and fall on the screw 11 via the drive spur gear 324. The lifting spur gear 33 moves upward along the axial direction of the screw 11 until it abuts against the top wall of the mounting cavity 21, thereby pushing the entire mounting shell 2 to move in the direction of movement of the lifting spur gear 33, causing the brush 4 to rise to the specified height. Subsequently, due to the output spur gear 324, the brush 4 rises to the specified height. All gears 34 mesh with the driving helical gear 35. When the driving helical gear 35 rotates continuously, it drives the output spur gear 34 to rotate circumferentially, thereby driving the brush 4 mounted on the output spur gear 34 to rotate at high speed. At this time, the brush 4 can sweep the surface of the carpet. Conversely, the power output shaft of the drive assembly 31 rotates in the opposite direction, which drives the driven helical gear 323 to rotate through the driving helical gear 35, so that the driving spur gear 324 rotates to drive the lifting spur gear 33 to move downward along the axial direction of the screw 11, so that the entire mounting shell 2 falls to the height at which the brush 4 can sweep the ground. With this configuration, the height of the mounting shell 2 can be controlled according to different ground environments or carpets of different thicknesses. When the mounting shell 2 is raised or lowered, the brush 4 is raised or lowered synchronously, so that the brush 4 can effectively contact and clean the carpet surface or the ground, improving cleaning efficiency.

[0046] It should be noted that, taking the meshing of the lifting spur gear 33 and the driving spur gear 324 as an example, during the meshing process of the lifting spur gear 33 and the driving spur gear 324, multiple teeth of the lifting spur gear 33 and multiple teeth of the driving spur gear 324 respectively form multiple meshing points at the contact points. Therefore, by moving along the tooth profile through multiple meshing points, the power of the lifting spur gear 33 is transmitted, that is, the lifting spur gear 33 is driven to rotate.

[0047] Helical gears have a larger meshing surface than spur gears, which helps to achieve a more uniform and smooth force transmission. Specifically, because the teeth of helical gears are inclined, unlike spur gears, when two helical gears mesh, the tooth blocks gradually contact from one end to the other, contributing to smooth contact and transmission between the two helical gears. During the meshing process, the helical gears start to contact from a certain tooth block of one gear and gradually transition to the corresponding tooth block of the next gear. Therefore, the transmission is continuous, unlike the instantaneous contact of spur gears. This design makes the helical gear transmission smoother and reduces impact and noise.

[0048] It is understandable that the tooth profile of helical gears is involute or circular arc. Taking the involute tooth profile as an example, helical gears with this tooth profile have excellent transmission performance and tooth profile accuracy, which can ensure the smoothness and accuracy of the transmission between the first cylindrical tooth 3221 and the driving spur gear 324.

[0049] It should also be noted that, since the lifting spur gear 33 is hollow and has a threaded opening that connects to the outer side of the screw 11, specifically, the outer side wall of the screw 11 is provided with a helical groove, and the edge of the threaded opening of the lifting spur gear 33 is provided with a corresponding helical tooth profile according to the helix of the screw, when the lifting spur gear 33 is rotating, its helical tooth edge can move along the helical groove of the screw, thereby enabling the entire lifting spur gear 33 to move up and down.

[0050] In some specific embodiments, the bottom surface of the driving spur gear 324 meshes with the top surface of the driven helical gear 323.

[0051] Specifically, in order to stably drive the drive spur gear 324 to rotate, the bottom surface of the drive spur gear 324 is meshed with the top surface of the driven helical gear 323. When the driven helical gear 323 rotates along its circumference, it synchronously drives the drive spur gear 324 to rotate accordingly.

[0052] More specifically, the top surface of the driven helical gear 323 is provided with a first annular ratchet 3231, and the bottom surface of the driving spur gear 324 is provided with a second annular ratchet 3241 that cooperates with the first annular ratchet 3231.

[0053] When the driven helical gear 323 rotates, it rises until its first annular ratchet 3231 meshes with the second annular ratchet 3241 of the driving spur gear 324. At this time, the driven helical gear 323 rotates continuously, which can drive the driving spur gear 324 to rotate accordingly, thereby driving the lifting spur gear 33 to rotate.

[0054] It should be noted that the first annular ratchet 3231 is fan-shaped or tooth-shaped, and correspondingly, the second annular ratchet 3241 is configured to have a shape corresponding to the fan-shaped or tooth-shaped. Therefore, when the first annular ratchet 3231 and the second annular ratchet 3241 are in contact, their tooth-shaped structures or fan-shaped surfaces can lock each other, thereby driving the driven helical gear 323.

[0055] It should also be noted that when the drive spur gear 324 is pushed upward by the driven helical gear 323 until the top of the drive spur gear 324 abuts against the top cavity wall of the assembly cavity 21, the top cavity wall acts as a limit for the drive spur gear 324, that is, to prevent the drive spur gear 324 from moving further upward, so that the drive spur gear 324 rotates in place and avoids it from falling off.

[0056] In some specific embodiments, the support frame 1 is provided with an elastic element 37 that pushes the first annular ratchet 3231 of the driven helical gear 323 to move in the direction of the second annular ratchet 3241.

[0057] The support frame 1 is provided with an elastic element 37 that pushes the second annular ratchet 3241 of the drive spur gear 324 to move to engage with the first annular ratchet 3231.

[0058] As described above, the pushing force released by the elastic element 37 during its recovery process, which is in a compressed state, ensures that the first annular ratchet 3222 and the second annular ratchet 3241 can be securely engaged, avoiding engagement failure or mis-engagement. Conversely, when the driven helical gear 323 rotates forward and moves downward axially, the driven helical gear 323 moves away from the driving spur gear 324. At this time, the driving spur gear 324 falls off, causing the second annular ratchet 3241 to fall down and abut against the first annular ratchet 3231.

[0059] It is understood that the elastic element 37 in this embodiment of the present invention is a spring.

[0060] In a further embodiment, the gear shaft 321 is provided with a limiting step 3211 to limit the range of movement of the driven spur gear 324.

[0061] Specifically, the limiting step 3211 is provided on the screw, and its main function is to limit the axial movement range of the drive spur gear 324. That is, when the spring is compressed, it pushes the drive spur gear 324 to move downward until the drive spur gear 324 abuts against the limiting step 3211. The limiting step 3211 acts as a physical block for the drive spur gear 324, preventing the drive spur gear 324 from moving excessively or misaligning, and ensuring that the movement range of the drive spur gear 324 is within the specified range.

[0062] In some specific embodiments, the support frame 1 is also provided with a guide rod 36, and the mounting shell 2 can be lifted and lowered on the guide rod 36.

[0063] Specifically, one end of the guide rod 36 is connected to the top of the support frame 1, and the other end of the guide rod 36 is connected to the bottom of the support frame 1, so that the entire guide rod 36 is vertically swaying, which provides a straight movement path for the mounting shell 2, so that the mounting shell 2 can move up and down along the movement path, thereby driving the brush component 4 to move up and down, and preventing the mounting shell 2 and the brush component 4 from deviating during the lifting process.

[0064] In some specific embodiments, a connecting part is provided on the outer side of the support frame 1, which is used to assemble with the sweeper.

[0065] Specifically, the support frame 1 is detachably mounted on the sweeper via a connecting part, allowing it to be securely connected to the sweeper or other components thereof. This connection method facilitates the removal of the support frame 1 from the sweeper and also makes it easier to subsequently assemble the entire lifting device onto the sweeper via the connecting part.

[0066] For example, the lifting device also includes a locking component. The bottom of the sweeper has a fixing hole, and the connecting part has a locking hole that corresponds to and communicates with the fixing hole. The locking component passes through both the locking hole and the fixing hole. Specifically, to improve the ease of assembly and disassembly of the lifting device, when assembling the lifting device, simply connect the fixing hole of the sweeper to the locking hole of the connecting part, and then insert the locking component into both the locking hole and the fixing hole simultaneously, so that the entire lifting device is fixedly assembled to the bottom of the sweeper. This design improves the ease of assembly between the lifting device and the sweeper and prevents the lifting device from easily falling off. Conversely, when disassembling the lifting device, simply remove the locking component from the fixing hole and the locking hole, and then the lifting device can be removed.

[0067] It is understood that the aforementioned locking component is a bolt, and both the fixing hole and the locking hole are threaded holes. By connecting the threads of the bolt with the threaded hole of the nut, the stability of the lifting device is improved.

[0068] The following describes in detail the specific structure of a sweeping machine provided by this utility model embodiment. As shown in the accompanying drawings, the specific structure of the sweeping machine includes the lifting device described in the above embodiment.

[0069] Since the sweeper in this embodiment of the utility model adopts all the technical solutions of all the above embodiments, it also has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0070] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A lifting device, characterized in that, The lifting device includes: A support frame, wherein a screw is vertically mounted on the support frame; The mounting housing is vertically and elliptically mounted on the support frame; an assembly cavity is formed inside the mounting housing. The drive mechanism includes a drive assembly disposed on the outside of the mounting housing and an active helical gear, a driven lifting gear set, and an output spur gear built into the assembly cavity. The active helical gear is sleeved on the power output shaft of the drive assembly. The driven lifting gear set includes a gear shaft, a lifting spur gear, a drive spur gear and a driven helical gear sleeved on the outside of the gear shaft. The lifting spur gear is slidably sleeved on the outside of the screw. The lifting spur gear meshes with the drive spur gear, and the driven helical gear meshes with the active helical gear. The output spur gear meshes with the active helical gear and is drivenly connected to the brush component.

2. The lifting device according to claim 1, characterized in that, The bottom surface of the driving spur gear meshes with the top surface of the driven helical gear.

3. The lifting device according to claim 2, characterized in that, The driven helical gear has a first annular ratchet on its side, and the driving spur gear has a second annular ratchet on its side opposite to the driven helical gear, which cooperates with the first annular ratchet.

4. The lifting device according to claim 3, characterized in that, The support frame is provided with an elastic element that pushes the second annular ratchet of the drive spur gear to move into engagement with the first annular ratchet.

5. The lifting device according to claim 1, characterized in that, The gear shaft is provided with a limiting step to restrict the range of movement of the drive spur gear.

6. The lifting device according to claim 1, characterized in that, The support frame is also provided with a guide rod, and the mounting shell can be lifted and lowered on the guide rod.

7. The lifting device according to claim 1, characterized in that, The support frame has a connecting part on its outer side, which is used to assemble the sweeper.

8. A sweeping machine, characterized in that, The sweeper is equipped with a lifting device as described in any one of claims 1-7.

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