Dual-axle drive mechanism, cleaning device and scrubber

Abstract

The application provides a double-shaft driving mechanism, a cleaning device and a scrubber. The double-shaft driving mechanism comprises: a composite gear rotatably installed, the composite gear having outer meshing teeth on the surface of an outer ring and inner meshing teeth on the surface of an inner ring; a first driven wheel configured to drive a first rotating shaft to rotate, the first driven wheel being engaged with the inner meshing teeth of the composite gear; and a second driven wheel configured to drive a second rotating shaft to rotate, the second driven wheel being engaged with the outer meshing teeth of the composite gear. In the technical scheme, the double-shaft driving mechanism has a compact structure, occupies a small space, and is reliable in torque transmission and low in failure rate.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, specifically to a dual-axis drive mechanism, a cleaning device, and a floor scrubber. Background Technology

[0002] Currently, cleaning equipment used for cleaning floors, such as floor scrubbers, has a dual-brush mechanism, which can greatly improve cleaning efficiency.

[0003] In traditional solutions, dual roller brushes can be driven by belts or gears. However, belt drives are prone to stalling and breakage, as well as fatigue failure. Gear drives, on the other hand, have multiple transmission stages and require more space. Summary of the Invention

[0004] In view of this, this application provides a dual-axis drive mechanism, a cleaning device, and a floor scrubber to solve the problems of poor reliability, multiple transmission stages, and large space occupation of the current drive mechanism for driving dual roller brushes.

[0005] According to one aspect of this application, a dual-axis drive mechanism is provided, the dual-axis drive mechanism comprising:

[0006] A compound gear, rotatably mounted, the compound gear having external meshing teeth located on the outer ring surface and internal meshing teeth located on the inner ring surface;

[0007] The first driven wheel is configured to drive the first rotating shaft to rotate, and the first driven wheel meshes with the internal meshing teeth of the compound gear;

[0008] The second driven wheel is configured to drive the second rotating shaft to rotate, and the second driven wheel meshes with the external meshing teeth of the compound gear.

[0009] In one possible embodiment, the dual-axis drive mechanism further includes a housing and bearings; wherein,

[0010] The inner ring of the bearing is fitted with the inner ring mating surface on the compound gear, and the outer ring of the bearing is fitted with the housing.

[0011] Alternatively, the outer ring of the bearing is fitted with the outer ring mating surface on the compound gear, and the inner ring of the bearing is fitted with the housing.

[0012] In one possible embodiment, an annular body is provided on the housing;

[0013] The inner ring of the bearing is fitted with the inner ring mating surface of the compound gear, and the outer ring of the bearing is fitted with the inner surface of the annular body.

[0014] In one possible embodiment, the compound gear includes an inner ring portion, an outer ring portion, and a connecting portion connecting the inner ring portion and the outer ring portion, wherein the internal meshing teeth are located on the inner surface of the inner ring portion, and the external meshing teeth are located on the outer surface of the outer ring portion; wherein the inner ring portion, the outer ring portion, and the connecting portion form an annular cavity;

[0015] The bearing is housed in the annular cavity, and the outer surface of the inner ring forms the inner ring mating surface that mates with the inner ring of the bearing.

[0016] In one possible embodiment, the module of the external meshing teeth of the composite gear is greater than the module of the internal meshing teeth, or the module of the external meshing teeth of the composite gear is the same as the module of the internal meshing teeth.

[0017] In one possible embodiment, the dual-axis drive mechanism further includes a drive wheel configured to drive the compound gear to rotate;

[0018] The driving wheel meshes with the external meshing teeth of the compound gear, or the driving wheel meshes with the internal meshing teeth of the compound gear.

[0019] In one possible embodiment, the driving wheel meshes with the external meshing teeth of the compound gear, and the number of teeth on the driving wheel is less than the number of teeth on the external meshing teeth.

[0020] In one possible embodiment, the rotational speeds of the first driven wheel and the second driven wheel are set to be the same.

[0021] In one possible embodiment, the dual-bearing drive mechanism further includes a housing, which comprises a box and a cover;

[0022] The compound gear, the first driven wheel, and the second driven wheel are located in the space between the housing and the cover. The compound gear, the first rotating shaft, and the second rotating shaft are all rotatably mounted on the bottom plate of the housing.

[0023] In one possible embodiment, the two ends of the first rotating shaft are respectively mounted on the base plate and the cover via bearings, and the two ends of the second rotating shaft are respectively mounted on the base plate and the cover via bearings.

[0024] According to another aspect of this application, a cleaning device is also provided, the cleaning device including a first roller brush, a second roller brush and a dual-axis drive mechanism as described above, wherein the first roller brush is fixedly mounted on the first rotating shaft and the second roller brush is fixedly mounted on the second rotating shaft.

[0025] According to another aspect of this application, a floor scrubber is also provided, the floor scrubber including the cleaning apparatus as described above.

[0026] The technical solution provided in this application uses a compound gear to drive the first and second driven wheels, thereby driving two rotating shafts. This reduces the number of gear transmission stages, decreases noise, and results in a compact structure with minimal space requirements. Furthermore, the dual-shaft drive mechanism provided in this application reliably transmits torque and has a low failure rate. When applied to cleaning equipment such as floor scrubbers to drive dual roller brushes, it can reduce the size of the cleaning equipment and improve its operational reliability.

[0027] Other features and advantages of this application will be described in detail in the following detailed embodiments section. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of a dual-axis drive mechanism according to one embodiment of this application;

[0030] Figure 2 This is a schematic diagram of a dual-axis drive mechanism with a housing according to one embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the dual-axis drive mechanism in a disengaged state according to one embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the structure of a compound gear according to one embodiment of this application;

[0033] Figure 5 for Figure 4 The diagram shows the structure of the compound gear from another angle.

[0034] Figure 6 This is a schematic diagram of a bearing mounted on a compound gear.

[0035] Figure 7 This is a schematic diagram of a compound gear mounted on a housing via bearings.

[0036] Figure 8 This is a schematic diagram of the structure of a compound gear according to one embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the gear arrangement of a dual-axis drive mechanism according to one embodiment of the present application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Housing; 11-Box; 12-Cover; 13-Fixing part; 14-Annular body; 2-Compound gear; 21-Inner ring; 211-Internal meshing tooth; 22-Outer ring; 221-External meshing tooth; 23-Inner ring mating surface; 24-Outer ring mating surface; 25-Connecting part; 26-Annular cavity; 3-Driving wheel; 4-Bearing; 41-Inner ring; 42-Outer ring; 5-First driven wheel; 6-Second driven wheel; 7-Motor; 81-First shaft; 82-Second shaft; 91-First bearing; 92-Second bearing. Specific Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0041] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used 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, and therefore should not be construed as a limitation on this application. Furthermore, "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0042] 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 at least one of that feature.

[0043] This application provides a dual-axis drive mechanism, such as... Figures 1-3 As shown, the dual-axis drive mechanism includes:

[0044] The compound gear 2 is rotatably mounted and has external meshing teeth 221 located on the outer ring surface and internal meshing teeth 211 located on the inner ring surface.

[0045] The first driven wheel 5 is configured to drive the first rotating shaft 81 to rotate, and the first driven wheel 5 meshes with the internal meshing teeth 211 of the compound gear 2;

[0046] The second driven wheel 6 is configured to drive the second rotating shaft 82 to rotate, and the second driven wheel 6 meshes with the external meshing teeth 221 of the compound gear 2.

[0047] The dual-axis drive mechanism provided in this application can be applied to cleaning equipment such as floor scrubbers. Roller brushes are respectively mounted on the first rotating shaft 81 and the second rotating shaft 82, thereby driving the two roller brushes to rotate via the first driven wheel 5 and the second driven wheel 6 to achieve the cleaning operation. Of course, the dual-axis drive mechanism provided in this application can also be used in other equipment that requires two rotating shafts to drive, such as two rollers.

[0048] The drive mechanism employs a compound gear 2 to drive the first driven wheel 5 and the second driven wheel 6, thereby driving two rotating shafts. This method reduces the number of gear transmission stages, decreases noise, and results in a compact structure with minimal space requirements. Furthermore, the dual-shaft drive mechanism provided in this application reliably transmits torque and has a low failure rate. When applied to drive dual roller brushes in cleaning equipment such as floor scrubbers, it can reduce the size of the cleaning equipment and improve its operational reliability.

[0049] In one embodiment, such as Figure 2 and Figure 3 As shown, the dual-axis drive mechanism also includes a housing 1 and a bearing 4, and the compound gear 2 is rotatably mounted on the housing 1 via the bearing 4.

[0050] For details, please refer to Figure 6 and Figure 7 The inner ring 41 of the bearing 4 can be fitted with the inner ring mating surface 23 provided on the compound gear 2, and the outer ring 42 of the bearing 4 is fitted with the housing 1. In this way, the outer ring 42 of the bearing 4 is fixed relative to the housing 1, while the inner ring 41 can rotate relative to the housing 1 together with the compound gear 2.

[0051] In order to enable the housing 1 to install the bearing 4, the housing 1 is provided with an annular body 14, and the outer ring 42 of the bearing 4 is fitted with the inner surface of the annular body 14.

[0052] In this application, the "fitting installation" of the inner ring 41 and outer ring 42 of the bearing 4 refers to fixing the inner ring 41 or the outer ring 42 to the mating structure respectively. For example, fitting the inner ring 41 to the inner ring mating surface 23 means fixing the inner ring 41 to the inner ring mating surface 23 (usually using a tight fit), and fitting the outer ring 42 of the bearing 4 to the inner surface of the annular body 14 means fixing the outer ring 42 to the inner surface of the annular body 14.

[0053] In one embodiment, the compound gear 2 can be adopted as follows: Figure 4 and Figure 5 The structure shown is as follows: Figure 4 and Figure 5As shown, the compound gear 2 includes an inner ring portion 21, an outer ring portion 22, and a connecting portion 25 connecting the inner ring portion 21 and the outer ring portion 22. The inner meshing teeth 211 are located on the inner surface of the inner ring portion 21, and the outer inner ring teeth 221 are located on the outer surface of the outer ring portion 22.

[0054] The inner ring portion 21, the outer ring portion 22, and the connecting portion 25 form an annular cavity 26. The inner ring portion 21 and the outer ring portion 22 serve as the two sides of the annular cavity 26, and the connecting portion 25 is the bottom of the annular cavity 26. To reduce weight, the connecting portion 25 can be designed as a hollow structure.

[0055] like Figure 6 and Figure 7 As shown, the bearing 4 is housed in the annular cavity 26, and the outer surface of the inner ring portion 21 is formed as an inner ring mating surface 23 that mates with the inner ring 41 of the bearing 4. After the annular body 14 of the housing 1 is inserted into the annular cavity 26 and mates with the outer ring 42 of the bearing 4, the compound gear 2 is rotatably mounted on the housing 1.

[0056] In this embodiment, an annular cavity 26 is provided on the compound gear 2, allowing the bearing 4 to be embedded within the compound gear 2. This reduces the thickness of the gear transmission mechanism, resulting in a compact overall structure and small footprint for the dual-shaft drive mechanism. Simultaneously, it ensures the axial width of the internal meshing teeth 211 and the external meshing teeth 221. The sufficient width of the internal meshing teeth 211 and the external meshing teeth 221 guarantees the stability of the meshing between the first driven wheel 5 and the second driven wheel 6.

[0057] It is understandable that compound gear 2 is not limited to Figure 4 and Figure 5 The structure shown is as follows: Figure 8 The composite gear 2 can also be rotatably mounted on the housing 1 via bearing 4. Specifically, the inner ring 41 of bearing 4 and... Figure 8 The inner ring mating surface 23 shown is fitted and installed, and the outer ring 42 of the bearing 4 is fitted and installed with the annular body 14 on the housing 1 in the above embodiment. However, in this embodiment, compared with the composite gear 2 in the above embodiment that can embed the bearing 4, the width of the external meshing teeth 221 in the axial direction of the composite gear 2 is narrower, so as to reduce the thickness of the entire gear. If the width of the external meshing teeth 221 is increased, the overall thickness of the composite gear 2 needs to be increased.

[0058] Furthermore, it can be understood that the bearing 4 is not limited to the method described in the above embodiments where the inner ring 41 is fitted with the compound gear 2 and the outer ring 42 is fitted with the housing 1. Alternatively, the outer ring 42 of the bearing 4 can be fitted with the outer ring mating surface 24 on the compound gear 2, while the inner ring 41 of the bearing 4 is fitted with the housing 1. For example, it can be configured as follows: Figure 4The inner surface of the outer ring portion 22 of the compound gear 2 serves as the outer ring mating surface 24 and is fitted with the outer ring 42 of the bearing 4, while the inner ring 41 of the bearing 4 is fitted with the outer surface of the annular body 14 provided on the housing 1.

[0059] In one embodiment, the module of the external meshing teeth 221 of the compound gear 2 is greater than the module of the internal meshing teeth 211, or the module of the external meshing teeth 221 of the compound gear 2 may be the same as the module of the internal meshing teeth 211.

[0060] Because the number of teeth on the outer ring surface of the compound gear 221 is greater than the number of teeth on the inner ring surface (assuming both have the same module), setting the module of the outer ring teeth 221 to be greater than the module of the inner ring teeth 211 improves tooth strength while reducing the number of teeth on the outer ring teeth 221. This makes it easier to set the transmission ratio between the first driven gear 5 and the compound gear 2, as well as the transmission ratio between the second driven gear 6 and the compound gear 2, within a certain range. However, increasing the module reduces the number of teeth and decreases the external meshing overlap, so a reasonable module selection is necessary.

[0061] In one embodiment, the rotational speeds of the first driven wheel 5 and the second driven wheel 6 can be set to be the same or different. Specifically, the number of teeth of the first driven wheel 5, the number of teeth of the internal meshing teeth 211 of the compound gear 2, and the number of teeth of the second driven wheel 6 and the external meshing teeth 221 of the compound gear 2 can be designed so that the rotational speeds of the first driven wheel 5 and the second driven wheel 6 reach the preset requirements according to the transmission ratio of the two pairs of gears.

[0062] In one embodiment, the dual-axis drive mechanism further includes a drive wheel 3, which is configured to drive a compound gear 2 to rotate, thereby driving the first driven wheel 5 and the second driven wheel 6 to rotate via the compound gear 2. The motor 7 that drives the drive wheel 3 can be located on the side of the housing 1 opposite to the drive wheel 3.

[0063] like Figures 1-3 As shown, the driving wheel 3 can mesh with the external meshing teeth 221 of the compound gear 2, and the number of teeth of the driving wheel 3 is less than the number of teeth of the external meshing teeth 221. Thus, the driving wheel 3 and the compound gear 2 rotate in opposite directions. Since the speed ratio is inversely proportional to the tooth ratio, the transmission from the driving wheel 3 to the compound gear 2 is a deceleration and reverse transmission.

[0064] In another embodiment, such as Figure 9 As shown, the driving gear 3 can also mesh with the internal meshing teeth of the compound gear 2.

[0065] In the embodiments provided in this application, the first driven wheel 5 meshes with the internal meshing teeth 211 of the compound gear 2. Therefore, the transmission from the compound gear 2 to the first driven wheel 5 is necessarily speed-up and same-direction transmission. The second driven wheel 6 meshes with the external meshing teeth 221 of the compound gear 2. Normally, the number of teeth of the second driven wheel 6 is set to be less than the number of teeth of the external meshing teeth 221 of the compound gear 2. Thus, the transmission from the compound gear 2 to the second driven wheel 6 is speed-up and reverse transmission.

[0066] It should also be noted that the compound gear 2 is not limited to the method in which the motor 7 drives the drive wheel 3, and then the drive wheel 3 drives the compound gear 2. It can also be configured so that the motor 7 directly drives the compound gear 2. In the case where the motor 7 directly drives the compound gear 2, the compound gear 2 is not rotatably mounted on the housing 1 via the bearing 4 as described above. Instead, a rotating shaft is provided on the compound gear 2, which is rotatably mounted to the housing 1 and directly driven by the motor 7.

[0067] In one embodiment, such as Figure 2 and Figure 3 As shown, the dual-axis drive mechanism includes a housing 1, which includes a box body 11 and a cover body 12; a compound gear 2, a first driven wheel 5 and a second driven wheel 6 are located in the space between the box body 11 and the cover body 12; the compound gear 2, the first rotating shaft 81 and the second rotating shaft 82 are rotatably mounted on the bottom plate of the box body 11.

[0068] Optionally, the two ends of the first rotating shaft 81 are respectively mounted on the bottom plate of the housing 11 and the cover 12 via bearings, and the two ends of the second rotating shaft 82 are respectively mounted on the bottom plate of the housing 11 and the cover 12 via bearings.

[0069] Specifically, such as Figure 3 As shown, a first bearing 91 can be respectively provided at one end of the first rotating shaft 81 and the second rotating shaft 82 facing the bottom plate of the housing 11, and a second bearing 92 can be respectively provided at one end of the first rotating shaft 81 and the second rotating shaft 82 facing the cover 12. The two ends of the first rotating shaft 81 are rotatably supported on the housing 1 by the first bearing 91 and the second bearing 92, respectively. The two ends of the second rotating shaft 82 are rotatably supported on the housing 1 by the first bearing 91 and the second bearing 92, respectively.

[0070] To ensure that the cover 12 can be fixed to the box 11, bolt holes can be provided on the side wall of the box 11. The edge of the cover 11 can be fixed to the box 11 with bolts. A fixing part 13 can also be provided in the middle of the box 11. The middle of the cover 12 can be fixed to the fixing part 13 with bolts. In this way, the connection between the cover 12 and the box 11 is more stable, and the problem of unstable rotation of the first rotating shaft 81 and the second rotating shaft 82 and noise generation caused by the deformation of the cover 12 relative to the box 11 will not occur.

[0071] According to another aspect of this application, a cleaning device is also provided, the cleaning device including a first roller brush, a second roller brush, and a dual-axis drive mechanism as described above, wherein the first roller brush is fixedly mounted on a first rotating shaft 81, and the second roller brush is fixedly mounted on a second rotating shaft 82.

[0072] According to another aspect of this application, a floor scrubber is also provided, the floor scrubber including the cleaning apparatus as described above.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dual-axis drive mechanism for a cleaning device, characterized in that, The cleaning device includes a first roller brush and a second roller brush, and the dual-axis drive mechanism includes: A compound gear, rotatably mounted, the compound gear having external meshing teeth located on the outer ring surface and internal meshing teeth located on the inner ring surface; The first driven wheel is configured to drive the first rotating shaft to rotate, and the first driven wheel meshes with the internal meshing teeth of the compound gear; The second driven wheel is configured to drive the second rotating shaft to rotate, and the second driven wheel meshes with the external meshing teeth of the compound gear; and A driving wheel is configured to drive the compound gear to rotate, thereby driving the first driven wheel and the second driven wheel to rotate through the compound gear; The first roller brush is fixedly mounted on the first rotating shaft, and the second roller brush is fixedly mounted on the second rotating shaft.

2. The dual-axis drive mechanism according to claim 1, characterized in that, The dual-axis drive mechanism also includes a housing and bearings; wherein... The inner ring of the bearing is fitted with the inner ring mating surface of the compound gear, and the outer ring of the bearing is fitted with the housing. Alternatively, the outer ring of the bearing is fitted with the outer ring mating surface on the compound gear, and the inner ring of the bearing is fitted with the housing.

3. The dual-axis drive mechanism according to claim 2, characterized in that, An annular body is provided on the shell; The inner ring of the bearing is fitted with the inner ring mating surface of the compound gear, and the outer ring of the bearing is fitted with the inner surface of the annular body.

4. The dual-axis drive mechanism according to claim 3, characterized in that, The composite gear includes an inner ring portion, an outer ring portion, and a connecting portion connecting the inner ring portion and the outer ring portion. The internal meshing teeth are located on the inner surface of the inner ring portion, and the external meshing teeth are located on the outer surface of the outer ring portion. The inner ring portion, the outer ring portion, and the connecting portion form an annular cavity. The bearing is housed in the annular cavity, and the outer surface of the inner ring forms the inner ring mating surface that mates with the inner ring of the bearing.

5. The dual-axis drive mechanism according to claim 1, characterized in that, The module of the external meshing teeth of the composite gear is greater than the module of the internal meshing teeth, or the module of the external meshing teeth of the composite gear is the same as the module of the internal meshing teeth.

6. The dual-axis drive mechanism according to any one of claims 1-5, characterized in that, The driving wheel meshes with the external meshing teeth of the compound gear, or the driving wheel meshes with the internal meshing teeth of the compound gear.

7. The dual-axis drive mechanism according to claim 6, characterized in that, The driving wheel meshes with the external meshing teeth of the compound gear, and the number of teeth on the driving wheel is less than the number of teeth on the external meshing teeth.

8. The dual-axis drive mechanism according to any one of claims 1-5, characterized in that, The rotational speeds of the first driven wheel and the second driven wheel are set to be the same.

9. The dual-axis drive mechanism according to claim 1, characterized in that, The dual-bearing drive mechanism also includes a housing, which comprises a box and a cover. The compound gear, the first driven wheel, and the second driven wheel are located in the space between the housing and the cover. The compound gear, the first rotating shaft, and the second rotating shaft are all rotatably mounted on the bottom plate of the housing.

10. The dual-axis drive mechanism according to claim 9, characterized in that, The two ends of the first rotating shaft are respectively mounted on the base plate and the cover via bearings, and the two ends of the second rotating shaft are respectively mounted on the base plate and the cover via bearings.

11. A cleaning device, characterized in that, The cleaning device is a dual-axis drive mechanism according to any one of claims 1-10.

12. A floor scrubbing machine, characterized in that, The floor scrubber includes the cleaning apparatus according to claim 11.

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