Pump structure of a cleaning robot

Abstract

The present invention discloses a pump structure of a cleaning robot, including an impeller capable of generating negative pressure by rotation, the impeller being provided with a first rotating shaft, a connector being provided between the first rotating shaft and the output shaft of a first motor, one of the wheels of the cleaning robot being provided with a second rotating shaft independent of the opposite wheel, the axis of the second rotating shaft being provided with an axial hole sleeved on the first rotating shaft, a cavity for accommodating the impeller being provided in the wheel, a discharge port connecting the cavity with the outside, and a channel connecting the cavity with a filter element being provided on the second rotating shaft. The present invention hides the impeller in the wheel, fully saving the space occupied by the pump body in the main body of the cleaning robot, freeing up more space for the filter element, and the first rotating shaft and the second rotating shaft do not affect each other and can realize coaxial but different speed rotation. Compared with the prior art, the present invention has a compact structure, reasonable layout, stable operation, low cost, light weight, and can hide the impeller in the wheel, saving space.

Description

Technical Field

[0001] The invention relates to the field of cleaning equipment, in particular to a pump structure of a cleaning robot. Background Art

[0002] Cleaning robots are divided into underwater cleaning robots and dry land cleaning robots. Their principles are similar. They all rely on driving wheels to complete forward, backward and turning movements. The negative pressure generated by the internal impeller allows garbage to enter the internal filter element, and the filtered water or air will be discharged from the machine through the impeller. For example, a similar underwater cleaning robot is disclosed in the patent with announcement number CN208380175U and the name of "Underwater Cleaning Robot". It uses an electric motor to drive the impeller to pump water, and another motor drives a driving wheel to rotate, and drives other wheels to rotate through pulleys. However, this cleaning robot is large in size, and the pump structure occupies a large part of the space, leaving very limited space for the filter element. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a pump structure for a cleaning robot with a compact structure, reasonable layout, stable operation, low cost, light weight, and an impeller hidden in the wheel in response to the current status of the above-mentioned prior art.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a pump structure of a cleaning robot, comprising an impeller that can generate negative pressure by rotation, the impeller is provided with a first rotating shaft, a connector is provided between the first rotating shaft and the output shaft of the first motor, one of the wheels of the cleaning robot is provided with a second rotating shaft independent of the opposite wheel, the axis of the second rotating shaft is provided with an axial hole sleeved on the first rotating shaft, a cavity for accommodating the impeller is provided in the wheel, the wheel is provided with an exhaust port connecting the cavity and the outside, and the second rotating shaft is provided with a channel connecting the cavity and the filter element.

[0005] To optimize the above technical solutions, the measures taken also include:

[0006] In the first solution, the above-mentioned wheel is a driving wheel, and a planetary gear reduction mechanism is connected between the end of the second rotating shaft and the connector.

[0007] The above-mentioned planetary gear reduction mechanism includes a first planetary gear reducer and a second planetary gear reducer, the second planetary gear reducer includes a fixed second inner gear ring, a second planetary gear and a second sun gear arranged in the second inner gear ring, and a second planet carrier arranged between the second sun gear and the first planetary gear reducer; the first planetary gear reducer includes a first sun gear arranged on the second planet carrier, a first inner gear ring synchronously connected to the second rotating shaft, and a first planetary gear that sets the rotating shaft on the second inner gear ring; the connector includes a third sun gear fixed on the output shaft, a third planetary gear meshing with the third sun gear and the second inner gear ring for transmission, a fourth planet carrier arranged between the third sun gear and the second planetary gear reducer, the second sun gear is arranged on the fourth planet carrier, and the first rotating shaft is fixed on the fourth planet carrier.

[0008] Another solution of the above connector is a fixing member that synchronously connects the output shaft and the first rotating shaft.

[0009] In the second solution, the wheel is a driving wheel, a second motor is provided on the side of the second rotating shaft, and a reducer is connected between the second motor and the second rotating shaft.

[0010] The above-mentioned reducer is a gear reducer or a pulley reducer.

[0011] In the third solution, the wheel is a driven wheel.

[0012] In all the solutions, the channel is located at the end or tube surface of the second shaft, and the discharge ports are located on both sides of the wheel.

[0013] Compared with the prior art, the pump structure of a cleaning robot of the present invention includes an impeller that can generate negative pressure by rotation, the impeller is provided with a first rotating shaft, a connector is provided between the first rotating shaft and the output shaft of the first motor, one of the wheels of the cleaning robot is provided with a second rotating shaft independent of the opposite wheel, the axis of the second rotating shaft is provided with an axial hole sleeved on the first rotating shaft, a cavity for accommodating the impeller is provided in the wheel, the wheel is provided with a discharge port connecting the cavity and the outside, and a channel connecting the cavity and the filter element is provided on the second rotating shaft. The present invention hides the impeller in the wheel, fully saves the space occupied by the pump body in the main body of the cleaning robot, frees up more space for the filter element, and the first rotating shaft and the second rotating shaft do not affect each other and can realize coaxial but different speed rotation. Compared with the prior art, the present invention has a compact structure, reasonable layout, stable operation, low cost, light weight, and can hide the impeller in the wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a structural diagram of Embodiment 5 of the present invention;

[0015] Figure 2 yes Figure 1 Partial cross-sectional view;

[0016] Figure 3 yes Figure 1 Schematic diagram of the decomposition of

[0017] Figure 4 yes Figure 2 Schematic diagram of the impeller and wheel;

[0018] Figure 5 yes Figure 4 A schematic diagram of the structure of the middle wheel and the second rotating shaft;

[0019] Figure 6 is a structural schematic diagram of embodiment 1;

[0020] Figure 7 yes Figure 6 Schematic diagram of the full cross-section structure;

[0021] Figure 8 It is a structural schematic diagram of a planetary gear reduction mechanism and a connector in Embodiment 1 of the present invention;

[0022] Fig. 9 yes Figure 8 Schematic diagram of the decomposition of

[0023] Fig.10 yes Figure 8 Schematic diagram of the full cross-section structure;

[0024] Fig.11 yes Fig.10 Schematic diagram of the decomposition

[0025] Fig.12 It is a schematic diagram of the structures of the third and fourth embodiments. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0027] The marks in the accompanying drawings are: first motor 1, output shaft 11, connector 2, third sun gear 21, third planetary gear 22, fourth planetary carrier 23, fifth planetary carrier 24, planetary gear reduction mechanism 3, first planetary gear reducer 31, first sun gear 311, first planetary gear 312, first inner ring gear 313, first planetary carrier 314, second planetary gear reducer 32, second sun gear 321, second planetary gear 322, second inner ring gear 323, second planetary carrier 324, third planetary carrier 325, impeller 41, first rotating shaft 42, wheel 51, discharge port 511, cavity 512, second rotating shaft 52, channel 521, shaft hole 522, filter element 6, reducer 7, second motor 8.

[0028] Embodiment 1, as Figures 6 to 11As shown, a pump structure of a cleaning robot includes an impeller 41 that can generate negative pressure by rotation, the impeller 41 is provided with a first rotating shaft 42, a connector 2 is provided between the first rotating shaft 42 and the output shaft 11 of the first motor 1, one of the wheels 51 of the cleaning robot is provided with a second rotating shaft 52 independent of the opposite wheel, and the axis of the second rotating shaft 52 is provided with an axial hole 522 sleeved on the first rotating shaft 42, as shown in FIG. Figure 4 and Figure 5 As shown; a cavity 512 for accommodating the impeller 41 is provided in the wheel 51, and a discharge port 511 connecting the cavity 512 and the outside is provided in the wheel 51, and a channel 521 connecting the cavity 512 and the filter element 6 is provided on the second rotating shaft 52. The present invention hides the impeller 41 in the wheel 51, which fully saves the space occupied by the pump body in the main body of the cleaning robot, frees up more space for the filter element 6, and the first rotating shaft 42 and the second rotating shaft 52 do not affect each other and can realize coaxial but different speed rotation. Compared with the prior art, the present invention has a compact structure, a reasonable layout, a stable operation, a low cost, a light weight, and can hide the impeller 41 in the wheel 51.

[0029] In the embodiment, the wheel 51 is a driving wheel, and a planetary gear reduction mechanism 3 is connected between the end of the second rotating shaft 52 and the connector 2. The output shaft 11 drives the connector 2 to rotate, and the connector 2 directly drives the first rotating shaft to rotate, and the planetary gear reduction mechanism 3 can reduce the speed of the connector 2 and transmit it to the second rotating shaft 52.

[0030] In the embodiment, the planetary gear reduction mechanism 3 includes a first planetary gear reducer 31 and a second planetary gear reducer 32, the second planetary gear reducer 32 includes a fixed second inner ring 323, a second planetary gear 322 and a second sun gear 321 arranged in the second inner ring 323, and a second planet carrier 324 arranged between the second sun gear 321 and the first planetary gear reducer 31; the first planetary gear reducer 31 includes a first sun gear 311 arranged on the second planet carrier 324, a first inner ring 313 synchronously connected to the second rotating shaft 52, and a first planetary gear 312 with a rotating shaft arranged on the second inner ring 323; the connector 2 includes a third sun gear 21 fixed on the output shaft 11, a third planetary gear 22 meshing with the third sun gear 21 and the second inner ring 323 for transmission, a fourth planet carrier 23 arranged between the third sun gear 21 and the second planetary gear reducer 32, the second sun gear 321 is arranged on the fourth planet carrier 23, and the first rotating shaft 42 is fixed on the fourth planet carrier 23.

[0031] In the embodiment, a fifth planet carrier 24 fixed on the fourth planet carrier 23 is provided between the third planetary gear 22 and the first motor 1; a third planet carrier 325 fixed on the second planet carrier 324 is provided between the second planetary gear 322 and the fourth planet carrier 23; and a first planet carrier 314 fixed on the second inner gear ring 323 is provided between the first planetary gear 312 and the impeller 41.

[0032] In the embodiment, the channel 521 is located on the tube surface of the second rotating shaft 52 , and the discharge port 511 is located on two side surfaces of the wheel 51 .

[0033] In the first embodiment, the process of the wheel 51 rotating is: the output shaft 11 synchronously drives the third sun gear 21 to rotate, the third sun gear 21 drives the third planetary gear 22 to rotate along the inner wall of the second inner gear ring 323, the third planetary gear 22 drives the fourth planet carrier 23 to rotate, then the second sun gear 321 on the fourth planet carrier 23 rotates synchronously with the fourth planet carrier 23; the second sun gear 321 drives the second planetary gear 322 to rotate along the inner wall of the second inner gear ring 323, the second planetary gear 322 drives the second planet carrier 324 to rotate, then the first sun gear 311 on the second planet carrier 324 rotates synchronously with the second planet carrier 324; the first sun gear 311 drives the first planetary gear 312 to rotate, and the first planetary gear 312 drives the first inner gear ring 313 to rotate circumferentially; the first inner gear ring 313 drives the second rotating shaft 52 to rotate, and finally drives the wheel 51 to rotate.

[0034] In the first embodiment, the process of the impeller 41 rotating is as follows: the fourth planet carrier 23 directly drives the first rotating shaft 42 to rotate, and finally drives the impeller 41 to rotate.

[0035] In the first embodiment, the pollution suction and purification process is as follows: the air or water filtered by the filter element 6 enters the cavity 512 through the channel 521 and is finally discharged to the outside through the discharge port 511 .

[0036] Embodiment 2: The structure of embodiment 2 is similar to that of embodiment 1, except that the connector 2 is a fixing member for synchronously connecting the output shaft 11 and the first rotating shaft 42 .

[0037] In the embodiment, Figure 5 As shown, the channel 521 is located on the tube surface of the second rotating shaft 52 , and the discharge port 511 is located on two side surfaces of the wheel 51 .

[0038] Embodiment 3, the structure is similar to that of the embodiment, a pump structure of a cleaning robot, including an impeller 41 capable of generating negative pressure by rotation, the impeller 41 is provided with a first rotating shaft 42, a connector 2 is provided between the first rotating shaft 42 and the output shaft 11 of the first motor 1, one of the wheels 51 of the cleaning robot is provided with a second rotating shaft 52 independent of the opposite wheel, the axis of the second rotating shaft 52 is provided with an axial hole 522 sleeved on the first rotating shaft 42, a cavity 512 for accommodating the impeller 41 is provided in the wheel 51, the wheel 51 is provided with a discharge port 511 connecting the cavity 512 and the outside, and a channel 521 connecting the cavity 512 and the filter element 6 is provided on the second rotating shaft 52. The present invention hides the impeller 41 in the wheel 51, fully saves the space occupied by the pump body in the main body of the cleaning robot, frees up more space for the filter element 6, and the first rotating shaft 42 and the second rotating shaft 52 do not affect each other and can realize coaxial but different speed rotation. Compared with the prior art, the present invention has a compact structure, a reasonable layout, a stable operation, a low cost, a light weight, and can hide the impeller 41 in the wheel 51 .

[0039] In the embodiment, Fig.12 As shown, the wheel 51 is a driving wheel, a second motor 8 is provided on the side of the second rotating shaft 52 , and a reducer 7 is connected between the second motor 8 and the second rotating shaft 52 .

[0040] In the embodiment, the reducer 7 is a gear reducer. The speed output by the second motor 8 is reduced in speed by the gear reducer and then transmitted to the second rotating shaft 52 .

[0041] In the embodiment, Figure 5 As shown, the channel 521 is located on the tube surface of the second rotating shaft 52 , and the discharge port 511 is located on two side surfaces of the wheel 51 .

[0042] Embodiment 4: The structure of embodiment 4 is similar to that of embodiment 3. Fig.12 As shown, the only difference is that the reducer 7 is a pulley reducer.

[0043] Embodiment 5, as Figures 1 to 5 As shown, a pump structure of a cleaning robot includes an impeller 41 that can generate negative pressure by rotation, the impeller 41 is provided with a first rotating shaft 42, a connector 2 is provided between the first rotating shaft 42 and the output shaft 11 of the first motor 1, one of the wheels 51 of the cleaning robot is provided with a second rotating shaft 52 independent of the opposite wheel, the axis of the second rotating shaft 52 is provided with an axial hole 522 sleeved on the first rotating shaft 42, a cavity 512 for accommodating the impeller 41 is provided in the wheel 51, the wheel 51 is provided with an outlet 511 connecting the cavity 512 and the outside, and a channel 521 connecting the cavity 512 and the filter element 6 is provided on the second rotating shaft 52.

[0044] In the embodiment, the wheel 51 is a driven wheel. The wheel 51 in this embodiment is dragged by the driving wheel.

[0045] In the embodiment, Figure 5 As shown, the channel 521 is located on the tube surface of the second rotating shaft 52 , and the discharge port 511 is located on two side surfaces of the wheel 51 .

[0046] The channel 521 of the first to fifth embodiments can also be disposed at the end of the second rotating shaft 52 .

[0047] The best embodiment of the present invention has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of the present invention.

Claims

1. A pump structure of a cleaning robot, comprising an impeller (41) capable of generating negative pressure by rotation, wherein the impeller (41) is provided with a first rotating shaft (42), a connector (2) is provided between the first rotating shaft (42) and an output shaft (11) of a first motor (1), and one of the wheels (51) of the cleaning robot is provided with a second rotating shaft (52) independent of the opposite wheel, wherein: The axis of the second rotating shaft (52) is provided with an axial hole (522) sleeved on the first rotating shaft (42); the wheel (51) is provided with a cavity (512) for accommodating the impeller (41), so that the impeller (41) is hidden in the wheel (51); the wheel (51) is provided with an outlet (511) connecting the cavity (512) and the outside; the second rotating shaft (52) is provided with a channel (521) connecting the cavity (512) and the filter element (6); The wheel (51) is a driving wheel, and a planetary gear reduction mechanism (3) is connected between the end of the second rotating shaft (52) and the connector (2); The planetary gear reduction mechanism (3) comprises a first planetary gear reducer (31) and a second planetary gear reducer (32); the second planetary gear reducer (32) comprises a fixed second inner gear ring (323), a second planetary gear (322) and a second sun gear (321) arranged in the second inner gear ring (323), and a second planet carrier (324) arranged between the second sun gear (321) and the first planetary gear reducer (31); the first planetary gear reducer (31) comprises a first sun gear (311) arranged on the second planet carrier (324), and is synchronously connected to the second rotating shaft ( 52), and a first planetary gear (312) with a rotating shaft arranged on the second inner gear ring (323); the connector (2) includes a third sun gear (21) fixed on the output shaft (11), a third planetary gear (22) meshing with the third sun gear (21) and the second inner gear ring (323), a fourth planetary carrier (23) arranged between the third sun gear (21) and the second planetary gear reducer (32), the second sun gear (321) being arranged on the fourth planetary carrier (23), and the first rotating shaft (42) being fixed on the fourth planetary carrier (23); The wheel (51) is a driving wheel. A second motor (8) is provided on the side of the second rotating shaft (52). A reducer (7) is connected between the second motor (8) and the second rotating shaft (52).

2. The pump structure of a cleaning robot according to claim 1, characterized in that: The connector (2) is a fixing member that synchronously connects the output shaft (11) and the first rotating shaft (42).

3. The pump structure of a cleaning robot according to claim 1, characterized in that: The reducer (7) is a gear reducer.

4. The pump structure of a cleaning robot according to claim 1, characterized in that: The reducer (7) is a pulley reducer.

5. A pump structure for a cleaning robot according to any one of claims 1 to 4, characterized in that: The passage (521) is located on the tube surface of the second rotating shaft (52), and the discharge port (511) is located on two side surfaces of the wheel (51).

6. A pump structure for a cleaning robot according to any one of claims 1 to 4, characterized in that: The passage (521) is located at the end of the second rotating shaft (52), and the discharge port (511) is located on two side surfaces of the wheel (51).

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