Driving wheel assembly and cleaning equipment

Abstract

The utility model relates to a driving wheel assembly and cleaning equipment, the driving wheel assembly is applied to the cleaning equipment, the driving wheel assembly comprises a driving device, a first driving wheel and a second driving wheel, and in the advancing direction of the driving wheel assembly, the first driving wheel and the second driving wheel are located on the two sides of the driving device correspondingly; the driving device is in transmission connection with the first driving wheel and the second driving wheel through a transmission mechanism so as to drive the first driving wheel and the second driving wheel to rotate through the transmission mechanism. Through the design, the structure of the driving wheel assembly can be more compact, so that the size of the driving wheel assembly is effectively reduced, the consistency of driving force provided by the driving device for the first driving wheel and the second driving wheel can be improved, and the stability of the cleaning equipment in the running process is effectively improved.

Description

Technical Field

[0001] The present disclosure relates to the field of household appliances, and particularly to a drive wheel assembly and a cleaning device. Background Art

[0002] For example, cleaning devices such as floor sweeping robots are often hindered by obstacles during the traveling process. To improve the working efficiency of the cleaning device, in the related art, the drive wheel assembly is improved to enable the cleaning device to have the ability to cross obstacles. However, the drive wheel assembly in the related art has problems of relatively large volume and poor stability in driving the cleaning device to travel. Summary of the Utility Model

[0003] To overcome the problems existing in the related art, the present disclosure provides a drive wheel assembly and a cleaning device.

[0004] According to a first aspect of the present disclosure, there is provided a drive wheel assembly applied to a cleaning device. The drive wheel assembly includes a driving device, a first drive wheel, and a second drive wheel. In the traveling direction of the drive wheel assembly, the first drive wheel and the second drive wheel are respectively located on both sides of the driving device. The driving device is respectively in transmission connection with the first drive wheel and the second drive wheel through a transmission mechanism, so as to drive the first drive wheel and the second drive wheel to rotate through the transmission mechanism.

[0005] In some embodiments of the present disclosure, a driving gear is provided at an output end of the driving device, a first driven gear is coaxially provided on the first drive wheel, the transmission mechanism includes a first gear set, and the driving gear is in meshing transmission with the first driven gear through the first gear set; a second driven gear is coaxially provided on the second drive wheel, and the transmission mechanism further includes a second gear set, and the driving gear is in meshing transmission with the second driven gear through the second gear set.

[0006] In some embodiments of the present disclosure, the first gear set includes N first gear pairs, N is a positive integer greater than or equal to 1. The first gear pair includes a first gear and a second gear that rotate coaxially. The outer diameter of the first gear is different from the outer diameter of the second gear. The driving gear is in meshing transmission with the first driven gear through the N first gear pairs; the second gear set includes M second gear pairs, M is a positive integer greater than or equal to 1. The second gear pair includes a third gear and a fourth gear that rotate coaxially. The outer diameter of the third gear is different from the outer diameter of the fourth gear. The driving gear is in meshing transmission with the second driven gear through the M second gear pairs.

[0007] In some embodiments of the present disclosure, N is 1, the driving gear meshes with the first gear, and the first driven gear meshes with the second gear; or, N is greater than 1 and N is odd, and N first gear pairs are arranged in sequence along the first transmission direction. The driving gear meshes with the first gear in the first gear pair on the upstream side of the first transmission direction, and the first driven gear meshes with the second gear in the first gear pair on the downstream side of the first transmission direction. Among adjacent first gear pairs, the first gear of one of the first gear pairs meshes with the second gear of another first gear pair; or, N is even, and N first gear pairs are arranged in sequence along the second transmission direction. The driving gear meshes with the first gear in the first gear pair on the upstream side of the second transmission direction, and the first driven gear meshes with the first gear in the first gear pair on the downstream side of the first transmission direction. Among adjacent first gear pairs, the first gear of one of the first gear pairs meshes with the second gear of another first gear pair.

[0008] In some embodiments of the present disclosure, M is 1, the driving gear meshes with the third gear, and the second driven gear meshes with the fourth gear; or, M is greater than 1 and M is odd, and M second gear pairs are arranged in sequence along the third transmission direction. The driving gear meshes with the third gear in the second gear pair on the upstream side of the third transmission direction, and the second driven gear meshes with the fourth gear in the second gear pair on the downstream side of the third transmission direction. Among adjacent second gear pairs, the third gear of one of the second gear pairs meshes with the fourth gear of another second gear pair; or, M is even, and M second gear pairs are arranged in sequence along the fourth transmission direction. The driving gear meshes with the third gear in the second gear pair on the upstream side of the fourth transmission direction, and the second driven gear meshes with the third gear in the second gear pair on the downstream side of the fourth transmission direction. Among adjacent second gear pairs, the third gear of one of the second gear pairs meshes with the fourth gear of another second gear pair.

[0009] In some embodiments of the present disclosure, the perpendicular distance between the rotation axis of the first driving wheel and the rotation axis of the second driving wheel is less than the sum of the first distance and the second distance. The first distance is the perpendicular distance between the rotation axis of the first driving wheel and the rotation axis of the output end, and the second distance is the perpendicular distance between the rotation axis of the second driving wheel and the rotation axis of the output end.

[0010] In some embodiments of the present disclosure, the rotation radius of the first driving wheel is equal to the rotation radius of the second driving wheel.

[0011] In some embodiments of the present disclosure, the drive wheel assembly further includes a mounting portion, and the drive device, the first drive wheel, the second drive wheel, and the transmission mechanism are all disposed on the mounting portion; a rotation connection structure is provided on the upper portion of the mounting portion, and the rotation connection structure is located on the downstream side of the drive device in the advancing direction of the drive wheel assembly.

[0012] In some embodiments of the present disclosure, the drive wheel assembly further includes an elastic member, and a fixing structure is further provided on the upper portion of the mounting portion. The fixing structure is located on the upstream side of the drive device in the advancing direction of the drive wheel assembly. One end of the elastic member is used to connect to the cleaning device, and the other end of the elastic member is connected to the fixing structure.

[0013] In some embodiments of the present disclosure, the mounting portion includes a housing having a cavity, and the transmission mechanism is located in the cavity. The housing includes opposite first side walls and second side walls, and a connecting wall connecting the first side walls and the second side walls. The output end of the drive device, the rotating shafts of the first drive wheel and the second drive wheel all extend into the cavity through the first side wall to be connected to the transmission mechanism in the cavity.

[0014] In some embodiments of the present disclosure, the rotation connection structure is provided on the connecting wall.

[0015] According to a second aspect of the present disclosure, there is provided a cleaning device, which includes: a device main body, and the device main body includes a chassis; the drive wheel assembly as described in the first aspect, mounted on the chassis.

[0016] In some embodiments of the present disclosure, there are two drive wheel assemblies, and the two drive wheel assemblies are located on both sides of the traveling direction of the cleaning device; the cleaning device further includes an auxiliary wheel located between the two drive wheel assemblies, and the auxiliary wheel is located on the upstream side of the two drive wheel assemblies in the advancing direction of the cleaning device.

[0017] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0018] In the drive wheel assembly provided by the embodiments of the present disclosure, in the advancing direction of the drive wheel assembly, the drive device is disposed between the first drive wheel and the second drive wheel, and the drive device is respectively in transmission connection with the first drive wheel and the second drive wheel through the transmission mechanism to drive the first drive wheel and the second drive wheel to rotate through the transmission mechanism. With such a design, not only can the structure of the drive wheel assembly be made more compact, thereby effectively reducing the volume of the drive wheel assembly, but also the consistency of the driving force provided by the drive device to the first drive wheel and the second drive wheel can be improved, thereby effectively improving the stability of the cleaning device during driving.

[0019] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0021] Figure 1 is a schematic structural diagram of a cleaning device in the related art;

[0022] Figure 2 is a schematic structural diagram of a drive wheel assembly at a first angle shown according to an exemplary embodiment;

[0023] Figure 3 is a schematic structural diagram of a drive wheel assembly at a second angle shown according to an exemplary embodiment;

[0024] Figure 4 is a schematic structural diagram of a drive wheel assembly with the second side wall hidden shown according to an exemplary embodiment;

[0025] Figure 5 is a schematic structural diagram of a cleaning device shown according to an exemplary embodiment.

[0026] In the drawings:

[0027] 1 - drive wheel assembly; 11 - driving device; 111 - driving gear; 12 - first drive wheel; 121 - first driven gear; 13 - second drive wheel; 131 - second driven gear; 14 - first gear pair; 141 - first gear; 142 - second gear; 15 - second gear pair; 151 - third gear; 152 - fourth gear; 16 - mounting portion; 161 - first side wall; 162 - second side wall; 163 - connecting wall; 17 - rotational connection structure; 171 - fixing boss; 172 - rotating shaft; 18 - elastic member; 19 - fixing structure; 2 - cleaning device; 21 - chassis; 22 - auxiliary wheel; 23 - device main body; 24 - drive wheel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] For example, cleaning equipment such as sweeping robots are often hindered by obstacles during their movement. For example, Figure 1 As shown, the cleaning device 2 includes a device body 23 and a chassis, on which two driving wheels 24 are arranged opposite to each other. Only two driving wheels 24 are used to complete the obstacle crossing action, and there is no auxiliary support when crossing the obstacle, which not only limits the obstacle crossing height, but also causes the phenomenon of being unable to move forward, thereby resulting in low working efficiency of the cleaning device 2.

[0030] In order to improve the working efficiency of the cleaning equipment, the related art improves the driving wheel assembly to enable the cleaning equipment to have the ability to overcome obstacles. Exemplarily, driving wheel assemblies are respectively arranged on both sides of the chassis of the cleaning equipment, and the driving wheel assembly includes a driving motor, and a front driving wheel and a rear driving wheel driven by the driving motor. The driving motor, the front driving wheel and the rear driving wheel are sequentially arranged at the bottom of the main body from front to back. The driving motor is connected to the front driving wheel through a transmission assembly, and the front driving wheel is connected to the rear driving wheel through another transmission assembly. The driving motor drives the front driving wheel to rotate while driving the rear driving wheel to rotate. The rear driving wheel provides an upward support force to assist in supporting the cleaning equipment when overcoming obstacles, and provides a forward driving force to drive the cleaning equipment forward.

[0031] However, the driving wheel assembly in the above-mentioned related technology has the problem of large size, and the transmission path between the driving motor and the front driving wheel is different in length from the transmission path between the driving motor and the rear driving wheel, which leads to low consistency in the driving force provided by the driving motor to the front driving wheel and the rear driving wheel, resulting in poor driving stability of the cleaning equipment.

[0032] In order to solve the above technical problems, the present disclosure provides a driving wheel assembly, in which a driving device is arranged between a first driving wheel and a second driving wheel in the traveling direction of the driving wheel assembly, and the driving device is respectively connected to the first driving wheel and the second driving wheel through a transmission mechanism, so as to drive the first driving wheel and the second driving wheel to rotate through the transmission mechanism. Such a design can not only make the structure of the driving wheel assembly more compact, thereby effectively reducing the volume of the driving wheel assembly, but also improve the consistency of the driving force provided by the driving device to the first driving wheel and the second driving wheel, thereby effectively improving the stability of the cleaning equipment during driving.

[0033] An exemplary embodiment of the present disclosure provides a driving wheel assembly for use in a cleaning device. Figure 2 , Figure 3 and Figure 4, the driving wheel assembly 1 includes a driving device 11, a first driving wheel 12 and a second driving wheel 13. The driving device 11 may be, for example, a driving motor. In the direction of travel of the driving wheel assembly 1, the first driving wheel 12 and the second driving wheel 13 are respectively located on both sides of the driving device 11. For example, in the direction of travel of the driving wheel assembly 1, the first driving wheel 12 and the second driving wheel 13 are respectively located on the front and rear sides of the driving device 11. The driving device 11 is respectively connected to the first driving wheel 12 and the second driving wheel 13 through a transmission mechanism, so as to drive the first driving wheel 12 and the second driving wheel 13 to rotate in the same direction through the transmission mechanism. When overcoming obstacles, for example, the second driving wheel 13 located on the downstream side of the direction of travel can provide an upward supporting force to assist in supporting the cleaning device 2, thereby increasing the obstacle overcoming height of the cleaning device 2. At the same time, under the drive of the driving device 11, the second driving wheel 13 can also provide a forward driving force to drive the cleaning device 2 to continue to move forward, so that the obstacle overcoming ability of the cleaning device 2 can be effectively improved.

[0034] In this embodiment, the driving device 11 is located between the first driving wheel 12 and the second driving wheel 13, which not only makes the structure of the driving wheel assembly 1 more compact, thereby effectively reducing the volume of the driving wheel assembly 1, but also ensures that the transmission path length from the driving device 11 to the first driving wheel 12 and the transmission path length from the driving device 11 to the second driving wheel 13 are as equal as possible, thereby improving the consistency of the driving force provided by the driving device 11 to the first driving wheel 12 and the second driving wheel 13, thereby effectively improving the stability of the cleaning equipment 2 during driving.

[0035] In one embodiment, in combination Figure 4 The output end of the driving device 11 is provided with a driving gear 111, and the first driven gear 121 is coaxially provided on the first driving wheel 12. The transmission mechanism includes a first gear set, and the driving gear 111 is meshed and driven with the first driven gear 121 through the first gear set. Such a design not only makes the structure of the driving wheel assembly 1 more compact, but also enables the driving device 11 to drive the rotation of the first driven gear 121 by gear transmission, that is, to drive the rotation of the first driving wheel 12. Compared with belt transmission, it can effectively improve the transmission accuracy and transmission efficiency, thereby further improving the stability of the cleaning device 2 when traveling.

[0036] Similarly, a second driven gear 131 is coaxially arranged on the second driving wheel 13, and the transmission mechanism further includes a second gear set, through which the driving gear 111 is meshed and transmitted with the second driven gear 131. In this way, while making the structure of the driving assembly more compact, the driving device 11 uses gear transmission to drive the rotation of the second driving wheel 13, which can effectively improve the transmission accuracy and transmission efficiency compared to belt transmission, thereby further improving the stability of the cleaning device 2 when traveling.

[0037] In one embodiment, in combination with Figure 4 , the first gear set includes N first gear pairs 14, where N is a positive integer greater than or equal to 1. For example, N is 1, or N is 2, or N is 3, etc. The first gear pair 14 includes a first gear 141 and a second gear 142 that rotate coaxially. The outer diameter of the first gear 141 is different from the outer diameter of the second gear 142. Exemplarily, the outer diameter of the first gear 141 is greater than the outer diameter of the second gear 142, or the outer diameter of the second gear 142 is greater than the outer diameter of the first gear 141. The driving gear 111 is meshed and transmitted with the first driven gear 121 through N first gear pairs 14. Exemplarily, along the transmission direction, the N first gear pairs 14 are arranged in sequence, and the adjacent first gear pairs 14 are meshed and transmitted. The first gear pair 14 located on the upstream side of the transmission direction is meshed and transmitted with the driving gear 111, and the first gear pair 14 located on the transmission direction is meshed and transmitted with the first driven gear 121. Thus, on the one hand, there is no gap during gear transmission, making the structure more compact while avoiding energy loss, thereby further improving the transmission efficiency. On the other hand, the driving gear 111 is meshed and transmitted with the first driven gear 121 through N first gear pairs 14, and the positions of the first gear pairs 14 can be reasonably arranged according to requirements, which is beneficial to further reducing the size of the driving wheel assembly 1.

[0038] The second gear set includes M second gear pairs 15, where M is a positive integer greater than or equal to 1. For example, M is 1, or M is 2, or M is 3, etc. The second gear pair 15 includes a third gear 151 and a fourth gear 152 that rotate coaxially. The outer diameter of the third gear 151 is different from the outer diameter of the fourth gear 152. Exemplarily, the outer diameter of the third gear 151 is greater than the outer diameter of the fourth gear 152, or the outer diameter of the fourth gear 152 is greater than the outer diameter of the third gear 151. The driving gear 111 is meshed and transmitted with the second driven gear 131 through M second gear pairs 15. Exemplarily, along the transmission direction, the M second gear pairs 15 are arranged in sequence, and the adjacent second gear pairs 15 are meshed and transmitted. The second gear pair 15 located on the upstream side of the transmission direction is meshed and transmitted with the driving gear 111, and the second gear pair 15 located on the transmission direction is meshed and transmitted with the second driven gear 131. Thus, on the one hand, there is no gap during gear transmission, making the structure more compact while avoiding energy loss, thereby further improving the transmission efficiency. On the other hand, the driving gear 111 is meshed and transmitted with the second driven gear 131 through M second gear pairs 15, and the positions of the second gear pairs 15 can be reasonably arranged according to requirements, which is beneficial to further reducing the size of the driving wheel assembly 1.

[0039] In this embodiment, the number of the first gear pairs 14 is the same as that of the second gear pairs 15 to ensure that the rotation directions of the first driving wheel 12 and the second driving wheel 13 are the same under the drive of the driving device 11.

[0040] In one embodiment, N is 1. The driving gear 111 meshes with the first gear 141, and the first driven gear 121 meshes with the second gear 142. The driving gear 111 drives the first gear 141 to rotate, and the second gear 142 coaxial with the first gear 141 drives the first driven gear 121 to rotate, thereby realizing the drive of the first driving wheel 12. In this way, the structure of the transmission mechanism is simpler and more compact. At the same time, the transmission accuracy of the transmission mechanism is improved, and the driving stability of the cleaning device 2 is improved.

[0041] In another embodiment, combined with Figure 4 , N is greater than 1 and N is an odd number, for example, 3. N first gear pairs 14 are arranged in sequence along the first transmission direction. The first transmission direction is, for example, the transmission direction from the driving gear 111 to the first driven gear 121. The driving gear 111 meshes with the first gear 141 in the first gear pair 14 on the upstream side of the first transmission direction, and the first driven gear 121 meshes with the second gear 142 in the first gear pair 14 on the downstream side of the first transmission direction. Among adjacent first gear pairs 14, the first gear 141 of one first gear pair 14 meshes with the second gear 142 of another first gear pair 14. Exemplarily, along the first transmission direction, the N first gear pairs 14 are respectively the 1st first gear pair 14, the 2nd first gear pair 14, the 3rd first gear pair 14... the Nth first gear pair 14. The first gear 141 of the 1st first gear pair 14 meshes with the driving gear 111, the second gear 142 of the 1st first gear pair 14 meshes with the first gear 141 of the 2nd first gear pair 14, the second gear 142 of the 2nd first gear pair 14 meshes with the first gear 141 of the 3rd first gear pair 14, and so on, until the second gear 142 of the Nth first gear pair 14 meshes with the first driven gear 121. In this way, while ensuring the transmission accuracy, the structure of the driving wheel assembly 1 is more compact, and the volume of the driving wheel assembly 1 is reduced.

[0042] In another embodiment, N is greater than 1 and N is an even number, such as 2. The N first gear pairs 14 are arranged in sequence along the second transmission direction, which is, for example, the transmission direction from the driving gear 111 to the first driven gear 121. The driving gear 111 meshes with the first gear 141 in the first gear pair 14 on the upstream side of the second transmission direction, and the first driven gear 121 meshes with the first gear 141 in the first gear pair 14 on the downstream side of the first transmission direction. Among adjacent first gear pairs 14, the first gear 141 of one of the first gear pairs 14 meshes with the second gear 142 of another first gear pair 14. Exemplarily, along the second transmission direction, the N first gear pairs 14 are respectively the 1st first gear pair 14, the 2nd first gear pair 14, the 3rd first gear pair 14... the Nth first gear pair 14. The first gear 141 of the 1st first gear pair 14 meshes with the driving gear 111, the second gear 142 of the 1st first gear pair 14 meshes with the first gear 141 of the 2nd first gear pair 14, the second gear 142 of the 2nd first gear pair 14 meshes with the first gear 141 of the 3rd first gear pair 14, and so on, until the first gear 141 of the Nth first gear pair 14 meshes with the first driven gear 121. In this way, while ensuring the transmission accuracy, the structure of the drive wheel assembly 1 can be made more compact, reducing the volume of the drive wheel assembly 1.

[0043] In one embodiment, M is 1. The driving gear 111 meshes with the third gear 151, and the second driven gear 131 meshes with the fourth gear 152. The driving gear 111 drives the third gear 151 to rotate, and the fourth gear 152 coaxial with the third gear 151 drives the second driven gear 131 to rotate, thereby realizing the drive of the second drive wheel 13. In this way, the structure of the transmission mechanism is simpler and more compact, and at the same time, the transmission accuracy of the transmission mechanism is improved, and the driving stability of the cleaning device 2 is improved.

[0044] In another embodiment, in combination with Figure 4, M is greater than 1 and M is an odd number, for example, 3. M second gear pairs 15 are arranged in sequence along a third transmission direction, and the third transmission direction is, for example, the transmission direction from the driving gear 111 to the second driven gear 131. The driving gear 111 meshes with the third gear 151 in the second gear pair 15 on the upstream side of the third transmission direction, the second driven gear 131 meshes with the fourth gear 152 in the second gear pair 15 on the downstream side of the third transmission direction, and in adjacent second gear pairs 15, the third gear 151 of one second gear pair 15 meshes with the fourth gear 152 of another second gear pair 15. Exemplarily, along the third transmission direction, the M second gear pairs 15 are respectively the 1st second gear pair 15, the 2nd second gear pair 15, the 3rd second gear pair 15... the Mth second gear pair 15. The third gear 151 of the 1st second gear pair 15 meshes with the driving gear 111, the fourth gear 152 of the 1st second gear pair 15 meshes with the third gear 151 of the 2nd second gear pair 15, the fourth gear 152 of the 2nd second gear pair 15 meshes with the third gear 151 of the 3rd second gear pair 15, and so on, until the fourth gear 152 of the Mth second gear pair 15 meshes with the second driven gear 131. In this way, while ensuring the transmission accuracy, the structure of the driving wheel assembly 1 is made more compact, and the volume of the driving wheel assembly 1 is reduced.

[0045] In another embodiment, M is greater than 1 and M is an even number, for example, 2. M second gear pairs 15 are arranged in sequence along a fourth transmission direction, and the fourth transmission direction is, for example, the transmission direction from the driving gear 111 to the second driven gear 131. The driving gear 111 meshes with the third gear 151 in the second gear pair 15 on the upstream side of the fourth transmission direction, the second driven gear 131 meshes with the third gear 151 in the second gear pair 15 on the downstream side of the fourth transmission direction, and in adjacent second gear pairs 15, the third gear 151 of one second gear pair 15 meshes with the fourth gear 152 of another second gear pair 15. Exemplarily, along the fourth transmission direction, the M second gear pairs 15 are respectively the 1st second gear pair 15, the 2nd second gear pair 15, the 3rd second gear pair 15... the Mth second gear pair 15. The third gear 151 of the 1st second gear pair 15 meshes with the driving gear 111, the fourth gear 152 of the 1st second gear pair 15 meshes with the third gear 151 of the 2nd second gear pair 15, the fourth gear 152 of the 2nd second gear pair 15 meshes with the third gear 151 of the 3rd second gear pair 15, and so on, until the third gear 151 of the Mth second gear pair 15 meshes with the second driven gear 131. In this way, while ensuring the transmission accuracy, the structure of the driving wheel assembly 1 is made more compact, and the volume of the driving wheel assembly 1 is reduced.

[0046] In one embodiment, in combination with Figure 4 , the vertical distance between the rotation axis of the first drive wheel 12 and the rotation axis of the second drive wheel 13 is less than the sum of the first distance and the second distance. The first distance is the vertical distance between the rotation axis of the first drive wheel 12 and the rotation axis of the output end, and the second distance is the vertical distance between the rotation axis of the second drive wheel 13 and the rotation axis of the output end. With such a setting form, the distance between the rotation axis of the first drive wheel 12 and the rotation axis of the output end, and the distance between the rotation axis of the second drive wheel 13 and the rotation axis of the output end are further reduced, making the drive wheel assembly 1 more compact. At the same time, it can also take into account ensuring the transmission accuracy of the transmission mechanism to improve the smoothness of the cleaning device 2 during driving, thereby effectively improving the user experience.

[0047] In one embodiment, in combination with Figure 2 and Figure 3 , the rotation radius of the first drive wheel 12 is equal to the rotation radius of the second drive wheel 13. When the cleaning device 2 is driving normally, that is, there are no obstacles, both the first drive wheel 12 and the second drive wheel 13 are in contact with the ground and drive on the ground. In this way, the smoothness of the cleaning device 2 during driving can be effectively improved. When the cleaning device 2 crosses an obstacle, for example, the first drive wheel 12 located on the upstream side of the traveling direction is lifted and suspended. At this time, for example, the second drive wheel 13 located on the downstream side of the traveling direction is still in contact with the ground to provide an upward supporting force to assist in supporting the cleaning device 2, thereby increasing the obstacle-crossing height of the cleaning device 2. At the same time, under the drive of the drive device 11, the second drive wheel 13 can also provide a forward driving force to drive the cleaning device 2 to continue to drive forward. In this way, the obstacle-crossing ability of the cleaning device 2 can be effectively improved, and the smoothness of the cleaning device 2 during obstacle crossing is further improved.

[0048] In one embodiment, in combination with Figure 2 and Figure 4 , the drive wheel assembly 1 further includes a mounting portion 16, and the drive device 11, the first drive wheel 12, the second drive wheel 13, and the transmission mechanism are all arranged on the mounting portion 16. A rotation connection structure 17 is provided on the upper part of the mounting portion 16, and through the rotation connection structure 17, the drive wheel assembly 1 is rotationally connected to the cleaning device 2. Exemplarily, the rotation connection structure 17 includes a fixed boss 171 provided on the upper part of the mounting portion 16, and a rotating shaft 172 provided on the fixed boss 171. The two ends of the rotating shaft 172 are respectively rotationally connected to the cleaning device 2. Alternatively, the rotating shaft 172 is rotationally connected to the fixed boss 171, and the two ends of the rotating shaft 172 are respectively fixed to the cleaning device 2.

[0049] The rotating connection structure 17 is located on the downstream side of the driving device 11 in the forward direction of the driving wheel assembly 1. When the cleaning device 2 crosses an obstacle, the driving wheel assembly 1 rotates around the rotating connection structure 17, so that, for example, the first driving wheel 12 located on the upstream side in the traveling direction can be lifted and suspended, thereby completing the obstacle-crossing action. With such a setting form, while facilitating the obstacle crossing of the cleaning device 2, the structure is simple and convenient for processing and assembly.

[0050] In one embodiment, in combination with Figure 2 and Figure 3 , the driving wheel assembly 1 further includes an elastic member 18, and the elastic member 18 can be, for example, a compression spring. A fixing structure 19 is further provided on the upper part of the mounting portion 16. The fixing structure 19 is located on the upstream side of the driving device 11 in the forward direction of the driving wheel assembly 1. One end of the elastic member 18 is used to connect to the cleaning device 2, and the other end of the elastic member 18 is connected to the fixing structure 19. Exemplarily, the fixing structure 19 is a hook structure, and the elastic member 18 is hooked on the hook structure. A hook structure for hooking the elastic member 18 is also provided on the cleaning device 2 to achieve connection with the elastic member 18. When the cleaning device 2 crosses an obstacle, the driving wheel assembly 1 rotates around the rotating connection structure 17, so that, for example, the first driving wheel 12 located on the upstream side in the traveling direction can be lifted and suspended. During this process, the elastic member 18 is compressed. After the obstacle-crossing action is completed, under the action of the elastic member 18, the driving wheel assembly 1 is pushed to rotate, so that, for example, the first driving wheel 12 located on the upstream side in the traveling direction is reset to contact the ground.

[0051] By providing the elastic member 18, it is convenient for the reset of, for example, the first driving wheel 12 located on the upstream side in the traveling direction, thereby further ensuring the smoothness of the cleaning device 2 during driving.

[0052] In one embodiment, in combination with Figure 2 and Figure 4 , the mounting portion 16 includes a housing having a cavity, and the transmission mechanism is located in the cavity. The housing includes opposite first side walls 161 and second side walls 162 and a connecting wall 163 connecting the first side walls 161 and the second side walls 162. The output end of the driving device 11, the rotating shafts 172 of the first driving wheel 12 and the second driving wheel 13 all extend into the cavity through the first side wall 161 to be connected to the transmission mechanism in the cavity. With such a setting form, the housing plays a protective role for the transmission mechanism, effectively improving the reliability of the transmission between the transmission mechanism, the driving device 11, the first driving wheel 12 and the second driving wheel 13, thereby improving the reliability of the cleaning device 2 and enhancing the user experience.

[0053] In one embodiment, in combination with Figure 2 , the rotating connection structure 17 is provided on the connecting wall 163. In this way, it is convenient to set the rotating connection structure 17 and improves the assembly convenience.

[0054] An exemplary embodiment of the present disclosure provides a cleaning device 2, which can be, for example, a sweeping robot. Figure 5 The cleaning device 2 includes a device body 23 and the driving wheel assembly 1 as described above. The device body 23 includes a chassis 21, and the driving wheel assembly 1 is mounted on the chassis 21. Under the drive of the driving wheel assembly 1, the movement of the cleaning device 2 is achieved.

[0055] In this embodiment, combined with Figure 2 and Figure 4 The driving wheel assembly 1 includes a driving device 11, a first driving wheel 12 and a second driving wheel 13. In the traveling direction of the driving wheel assembly 1, the first driving wheel 12 and the second driving wheel 13 are respectively located on both sides of the driving device 11. The driving device 11 is respectively connected to the first driving wheel 12 and the second driving wheel 13 through a transmission mechanism, so as to drive the first driving wheel 12 and the second driving wheel 13 to rotate in the same direction through the transmission mechanism. When overcoming obstacles, for example, the second driving wheel 13 located on the downstream side of the traveling direction can provide an upward supporting force to assist in supporting the cleaning device 2, thereby increasing the obstacle overcoming height of the cleaning device 2. At the same time, under the drive of the driving device 11, the second driving wheel 13 can also provide a forward driving force to drive the cleaning device 2 to continue to move forward. In this way, the obstacle overcoming ability of the cleaning device 2 can be effectively improved.

[0056] Such a design not only makes the structure of the driving wheel assembly 1 more compact, thereby effectively reducing the volume of the driving wheel assembly 1, but also ensures that the transmission path from the driving device 11 to the first driving wheel 12 and the transmission path from the driving device 11 to the second driving wheel 13 are as similar as possible, thereby improving the consistency of the driving force provided by the driving device 11 to the first driving wheel 12 and the second driving wheel 13, thereby effectively improving the stability of the cleaning equipment 2 during driving.

[0057] In one embodiment, in combination Figure 5 , two driving wheel assemblies 1 are provided, and the two driving wheel assemblies 1 are located on both sides of the travel direction of the cleaning device 2. Exemplarily, in the travel direction of the driving wheel assembly 1, the two driving wheel assemblies 1 are respectively arranged on opposite left and right sides. Such a design can keep the cleaning device 2 balanced, thereby further improving the driving stability of the cleaning device 2.

[0058] The cleaning device 2 further includes an auxiliary wheel 22 located between the two drive wheel assemblies 1. The auxiliary wheel 22 can be, for example, a caster wheel. The auxiliary wheel 22 is located on the upstream side of the two drive wheel assemblies 1 in the forward direction of the cleaning device 2. With such an arrangement, on the one hand, the running stability of the cleaning device 2 can be further improved. On the other hand, the auxiliary wheel 22 can play a guiding role, improving the smoothness during the running of the cleaning device 2, thereby effectively improving the cleaning efficiency of the cleaning device 2.

[0059] When the cleaning device 2 crosses an obstacle, the auxiliary wheel 22 is supported by the obstacle, which may cause, for example, the first drive wheel 12 on the upstream side of the drive wheel assembly 1 to be lifted and suspended, losing its driving ability. At this time, the second drive wheel 13 on the downstream side in the traveling direction can provide an upward supporting force to assist in supporting the cleaning device 2, thereby increasing the obstacle-crossing height of the cleaning device 2. At the same time, under the drive of the drive device 11, the second drive wheel 13 can also provide a forward driving force to drive the cleaning device 2 to continue to move forward. In this way, the obstacle-crossing ability of the cleaning device 2 can be effectively improved.

[0060] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed herein. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0061] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A driving wheel assembly, applied to a cleaning device, characterized in that: The driving wheel assembly includes a driving device, a first driving wheel and a second driving wheel. In the traveling direction of the driving wheel assembly, the first driving wheel and the second driving wheel are respectively located on both sides of the driving device. The driving device is respectively connected to the first driving wheel and the second driving wheel through a transmission mechanism to drive the first driving wheel and the second driving wheel to rotate through the transmission mechanism.

2. The driving wheel assembly according to claim 1, characterized in that: The output end of the driving device is provided with a driving gear, the first driving wheel is coaxially provided with a first driven gear, the transmission mechanism includes a first gear set, and the driving gear is meshed and driven with the first driven gear through the first gear set; A second driven gear is coaxially arranged on the second driving wheel, and the transmission mechanism further includes a second gear set, through which the driving gear meshes and transmits power to the second driven gear.

3. The driving wheel assembly according to claim 2, characterized in that: The first gear set includes N first gear pairs, N is a positive integer greater than or equal to 1, the first gear pair includes a first gear and a second gear rotating coaxially, the outer diameter of the first gear is different from the outer diameter of the second gear, and the driving gear is meshed and driven with the first driven gear through the N first gear pairs; The second gear set includes M second gear pairs, M is a positive integer greater than or equal to 1, the second gear pair includes a third gear and a fourth gear rotating coaxially, the outer diameter of the third gear is different from the outer diameter of the fourth gear, and the driving gear is meshed and transmitted with the second driven gear through the M second gear pairs.

4. The driving wheel assembly according to claim 3, characterized in that: N is 1, the driving gear is meshed with the first gear, and the first driven gear is meshed with the second gear; or, N is greater than 1 and is an odd number, the N first gear pairs are arranged in sequence along the first transmission direction, the driving gear is meshed with the first gear of the first gear pair on the upstream side of the first transmission direction, the first driven gear is meshed with the second gear of the first gear pair on the downstream side of the first transmission direction, and among adjacent first gear pairs, the first gear of one of the first gear pairs is meshed with the second gear of another of the first gear pairs; or, N is an even number, and N first gear pairs are arranged sequentially along the second transmission direction, the driving gear is meshed with the first gear of the first gear pair on the upstream side of the second transmission direction, the first driven gear is meshed with the first gear of the first gear pair on the downstream side of the first transmission direction, and among adjacent first gear pairs, the first gear of one of the first gear pairs is meshed with the second gear of another first gear pair.

5. The driving wheel assembly according to claim 3, characterized in that: M is 1, the driving gear is meshed with the third gear, and the second driven gear is meshed with the fourth gear; or, M is greater than 1 and is an odd number, and the M second gear pairs are arranged in sequence along the third transmission direction, the driving gear is meshed with the third gear of the second gear pair on the upstream side of the third transmission direction, the second driven gear is meshed with the fourth gear of the second gear pair on the downstream side of the third transmission direction, and among the adjacent second gear pairs, the third gear of one of the second gear pairs is meshed with the fourth gear of another second gear pair; or, M is an even number, and M second gear pairs are arranged sequentially along the fourth transmission direction, the driving gear is meshed with the third gear of the second gear pair on the upstream side of the fourth transmission direction, the second driven gear is meshed with the third gear of the second gear pair on the downstream side of the fourth transmission direction, and among adjacent second gear pairs, the third gear of one second gear pair is meshed with the fourth gear of another second gear pair.

6. The driving wheel assembly according to any one of claims 2 to 5, characterized in that: A vertical distance between the rotation axis of the first drive wheel and the rotation axis of the second drive wheel is less than the sum of a first distance and a second distance, wherein the first distance is the vertical distance between the rotation axis of the first drive wheel and the rotation axis of the output end, and the second distance is the vertical distance between the rotation axis of the second drive wheel and the rotation axis of the output end.

7. The driving wheel assembly according to any one of claims 1 to 5, characterized in that: The rotation radius of the first driving wheel is equal to the rotation radius of the second driving wheel.

8. The driving wheel assembly according to any one of claims 1 to 5, characterized in that: The driving wheel assembly further comprises a mounting portion, and the driving device, the first driving wheel, the second driving wheel and the transmission mechanism are all arranged on the mounting portion; A rotation connection structure is disposed on the upper portion of the mounting portion, and the rotation connection structure is located at a downstream side of the driving device in the forward direction of the driving wheel assembly.

9. The driving wheel assembly according to claim 8, characterized in that: The driving wheel assembly also includes an elastic member, and a fixing structure is also provided on the upper portion of the mounting portion. The fixing structure is located on the upstream side of the driving device in the forward direction of the driving wheel assembly. One end of the elastic member is used to connect to the cleaning device, and the other end of the elastic member is connected to the fixing structure.

10. The driving wheel assembly according to claim 8, characterized in that: The mounting portion includes a shell having a cavity, the transmission mechanism is located in the cavity, the shell includes a first side wall and a second side wall opposite to each other, and a connecting wall connecting the first side wall and the second side wall, the output end of the driving device, the rotating shaft of the first driving wheel and the rotating shaft of the second driving wheel all extend into the cavity through the first side wall to be connected to the transmission mechanism in the cavity.

11. The driving wheel assembly according to claim 10, characterized in that: The rotating connection structure is arranged on the connecting wall.

12. A cleaning device, characterized in that: The cleaning equipment comprises: A device body, the device body comprising a chassis; The drive wheel assembly according to any one of claims 1 to 11, mounted on the chassis.

13. The cleaning device according to claim 12, characterized in that The driving wheel assemblies are provided with two, and the two driving wheel assemblies are located on both sides of the traveling direction of the cleaning device; The cleaning device further comprises an auxiliary wheel located between the two driving wheel assemblies, wherein the auxiliary wheel is located on an upstream side of the two driving wheel assemblies in a forward direction of the cleaning device.

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