CN216776893U - Drainage structure and base station - Google Patents

Abstract

The utility model provides a drainage structure and a base station, which are applied to cleaning equipment, wherein the cleaning equipment is provided with a water tank and a water outlet, the drainage structure comprises a tray for accommodating the cleaning equipment, an ejector rod movably connected with the tray and a transmission structure connected with the ejector rod, and the tray is provided with a through hole for the transmission structure to penetrate out and an opening for the ejector rod to penetrate out; the water outlet of the cleaning device corresponds to the open hole, so that when the cleaning device is stored in the tray and triggers the transmission structure, the transmission structure can lift the ejector rod to open the drainage switch in the cleaning device. The utility model not only has simple structure, but also can automatically finish the drainage of the cleaning equipment.

Description

Drainage structure and base station

Technical Field

The utility model relates to a drainage structure and a base station, and belongs to the field of cleaning equipment.

Background

At present, a base station of a sweeping robot on the market can seldom add clean water to the sweeping robot automatically, and discharge sewage stored in the sweeping robot, and generally the sweeping robot needs to be manually filled with clean water or discharged with sewage, so that the sweeping robot is very inconvenient, and the user experience is poor.

In view of the above, it is necessary to provide a drainage structure and a base station to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a drainage structure, which is used for better automatically draining water for cleaning equipment.

In order to achieve the purpose, the utility model provides a drainage structure which is applied to cleaning equipment, wherein the cleaning equipment is provided with a water tank and a water outlet, the drainage structure comprises a tray for accommodating the cleaning equipment, an ejector rod movably connected with the tray and a transmission structure connected with the ejector rod, and the tray is provided with a through hole for the transmission structure to penetrate out and a hole for the ejector rod to penetrate out; the water outlet of the cleaning device corresponds to the open hole, so that when the cleaning device is stored in the tray and triggers the transmission structure, the transmission structure can lift the ejector rod to open the drainage switch in the cleaning device.

As a further improvement of the utility model, the transmission structure comprises a transmission gear set connected with the ejector rod and a pedal connected with the transmission gear set; the pedal comprises a pressing piece and a shaft rod, the transmission gear set comprises a first transmission gear and a second transmission gear meshed with the first transmission gear, a through hole is formed in the first transmission gear, and the shaft rod penetrates through the through hole and is fixedly connected with the first gear.

As a further improvement of the utility model, the transmission gear set further comprises a connecting plate for connecting the second transmission gear and the ejector rod, and one end of the connecting plate is provided with a fixing groove for fixing the ejector rod; one end of the ejector rod is provided with a positioning shaft, and the positioning shaft is clamped into the fixing groove so as to movably connect the ejector rod with the connecting plate.

As a further improvement of the present invention, the through hole is provided in a square shape, one end of the shaft rod penetrating through the through hole is also provided in a square shape, the first transmission gear is provided with a half-wheel saw tooth, and the shaft rod rotates after the pressing piece is pressed, and drives the first transmission gear and the second transmission gear to rotate, so that the connecting plate tilts up and drives the ejector rod to lift.

As a further improvement of the utility model, the second transmission gear is also provided with saw teeth of a half wheel, and the saw teeth of the second transmission gear are meshed with the saw teeth of the first transmission gear.

As a further improvement of the utility model, the pressing piece penetrates out of the through hole until at least one end of the pressing piece is higher than the horizontal plane of the tray.

As a further improvement of the utility model, the tray is also provided with a groove for collecting and leading out water flow overflowing during drainage, and the groove is arranged around the opening; the groove comprises a water collecting tank and a guide groove, the water collecting tank surrounds the opening and is arranged on the ejector rod and used for collecting water flow flowing out of the water outlet, and the guide groove is communicated with the water collecting tank and used for guiding the water flow in the water collecting tank to be discharged from the tray.

As a further improvement of the utility model, the ejector rod is provided with a cap, the side edge of the cap protrudes with a clamping edge, and the clamping edge is used for abutting against the opening when the ejector rod penetrates out, so as to limit the penetrating height of the ejector rod.

As a further improvement of the utility model, the ejector rod is arranged in a cylindrical shape, the opening is a circular hole, the clamping edge is arranged in a circular ring shape, and the outer diameter of the clamping edge is larger than that of the opening.

The utility model aims to provide a base station to better apply the drainage structure.

In order to achieve the above object, the present invention provides a base station for accommodating a cleaning device, the base station including the above drainage structure.

The utility model has the beneficial effects that: the drainage structure of the utility model has simple structure, can automatically and effectively realize the drainage function for the cleaning equipment, can keep other parts dry in the drainage process, and prolongs the service life. The base station loads the drainage structure, so that the whole base station is simpler in structure, not only can accommodate cleaning equipment, but also can automatically drain the cleaning equipment.

Drawings

Fig. 1 is a schematic structural diagram of a base station according to the present invention.

FIG. 2 is a schematic view of the structure of the cleaning apparatus of the present invention.

Fig. 3 is a schematic structural view of the automatic water changing structure of the present invention.

Fig. 4 is an exploded view of the automatic water change structure shown in fig. 3.

Fig. 5 is a schematic view of the structure of fig. 4 with the tray removed.

Fig. 6 is a perspective view of the first lifting structure of fig. 5.

Fig. 7 is an exploded view of fig. 6.

Fig. 8 is an exploded view of the second transmission gear and the first ram of fig. 7.

Fig. 9 is a schematic view of the structure of the tray of fig. 4.

Fig. 10 is an enlarged view of a portion a in fig. 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, the present invention discloses a base station 100, wherein the base station 100 is used for storing and/or cleaning a cleaning device 200, and comprises an automatic water changing structure for automatically changing water for the cleaning device 200, and specifically, the automatic water changing structure comprises a water filling structure for filling clean water for the cleaning device 200 and a water draining structure for draining sewage for the cleaning device 200.

The cleaning device 200 of the present invention is preferably a sweeping robot, but should not be limited thereto. A water tank, a water inlet 201 and a water outlet 202 are arranged in the cleaning device 200. The water injection structure is connected with the water inlet 201 and used for injecting clean water into the water tank, and the water drainage structure is connected with the water outlet 202 and used for discharging sewage in the water tank.

As shown in fig. 3 to 8, the water filling structure includes a first lifting structure 1 and a tray 3 for receiving the cleaning device 200. First promotion structure 1 is including being the first ejector pin 12 that the cavity form set up and link up from top to bottom, the drive gear group of being connected with first ejector pin 12 and with drive gear group link and expose in the first footboard 11 of tray 3, first footboard 11 includes pressing piece 110 and axostylus axostyle 111 with pressing piece 110 fixed connection, specifically, drive gear group and axostylus axostyle 111 fixed connection, when touching pressing piece 110, can drive gear group and rotate, make first ejector pin 12 promote.

The drainage structure comprises the tray 3 and the second lifting structure 2, the second lifting structure 2 comprises a second top rod 22, a transmission gear set and a second pedal 21, the structure of the second top rod 22 is the same as that of the first top rod 12, except that the second top rod 22 is arranged in an up-down closed type or a solid state, the transmission gear set of the first lifting structure 1 is the same as that of the transmission gear set of the second lifting structure 2, the structure of the first pedal 11 is also the same as that of the second pedal 21, that is, the first lifting structure 1 is different from the second lifting structure 2 only in that the structures of the first top rod 12 and the second top rod 22 are different, and other structures are the same. In this embodiment, the tray 3 in the water filling structure and the tray 3 in the water draining structure share one tray, but of course, in other embodiments, the two trays 3 may be divided into two parts, and the embodiment is not limited herein.

Since the first lifting structure 1 and the second lifting structure 2 have the same structure except for the different push rods, the following description will take the first lifting structure 1 as an example to describe the specific structure and the working principle of the first lifting structure 1 in detail, and the second lifting structure 2 will not be described again.

It should be noted that: the transmission gear set, the first pedal 11 and the second pedal 21 can form a transmission structure to correspondingly lift the first ejector rod 12 and the second ejector rod 22; of course, the transmission structure may also be configured to include a transmission gear set connected to the first ejector rod 12 or the second ejector rod 22 and a seesaw connected to the transmission gear set, or be a transmission structure in another structure, as long as the first ejector rod 12 or the second ejector rod 22 can be inserted into the water inlet 201 or the water outlet 202 of the cleaning device under the action of the transmission structure, which is not limited herein.

With reference to fig. 6, 7 and 8, the transmission gear set in the first lifting structure 1 includes a first transmission gear 13 and a second transmission gear 14 engaged with the first transmission gear 13, the first transmission gear 13 is provided with a through hole 130, and the shaft 111 passes through the through hole 130 and is fixedly connected to the first transmission gear 13. In this embodiment, the through hole 130 is disposed in a square shape, and one end of the shaft 111 penetrating through the through hole 130 is also disposed in a square shape, so that the matching manner between the shaft 111 and the through hole 130 is unique, and the shaft 111 can be prevented from sliding freely in the through hole 130.

The first lifting structure 1 further includes a connecting plate 140 connecting the second transmission gear 14 and the first push rod 12, a fixing groove 141 is formed at one end of the connecting plate 140, a positioning shaft 120 is arranged at one end of the first push rod 12, and the positioning shaft 120 is clamped into the fixing groove 141 to movably connect the first push rod 12 and the second transmission gear 14. Here, "movably connected" means: when one end of the connection plate 140 tilts up or falls down, the first push rod 12 does not tilt left or right following the one end of the connection plate 140, but moves up or down only in the vertical direction. The other end of the connecting plate 140 is fixedly connected with the second transmission gear 14.

The pressing piece 110 is fixed at one end of the shaft rod 111 far away from the second transmission gear 14, the pressing piece 110 comprises a pressing body 112 and a table post 113 connected with the pressing body 112, the table post 113 is fixedly connected with the shaft rod 111, and the pressing body 112 is arranged on one side of the shaft rod 111 in a suspending mode. With such an arrangement, when the pressing body 112 is pressed downwards, the table column 113 can be used to drive the shaft rod 111 to rotate, so as to drive the first transmission gear 13 to rotate downwards, and further drive the second transmission gear 14 engaged therewith to rotate downwards, and meanwhile, the end of the connecting plate 140 connected with the first push rod 12 tilts upwards, so that the first push rod 12 is lifted upwards. On the contrary, when the pressing body 112 is reset upwards, the first transmission gear 13 and the second transmission gear 14 can be driven to rotate upwards, and then the first top rod 12 descends until the initial position is recovered.

In order to enable the first push rod 12 to ascend or descend in the vertical direction, the positioning shaft 120 on the first push rod 12 is cylindrical, and the fixing groove 141 is a smooth U-shaped groove, so that the positioning shaft 120 can be driven by the connecting plate 140 to freely rotate in the fixing groove 141, and the first push rod 12 ascends or descends in the vertical direction. It will be appreciated that, according to the working principle and procedure described above, when the shaft 111 in the second lifting structure 2 is rotated, the corresponding lowering or lifting of the second jack 22 can also be achieved.

Furthermore, the purpose of squaring both the bore 130 and the end of the shaft 111 is also: when the pressing body 112 is pressed, the shaft 111 can be driven to rotate downward to drive the first transmission gear 13 to rotate, and then the second transmission gear 14 engaged with the first transmission gear is driven to rotate, so that the connecting plate 140 tilts and drives the first push rod 12 or the second push rod 22 to lift. First drive gear 13 and second drive gear 14 all only establish the sawtooth of half round, and second drive gear 14 passes through the sawtooth and is connected with first drive gear 13 meshing, so sets up, not only can restrict the ejector pin in first promotion structure 1 and the second promotion structure 2 and promote or the height that descends, can save material moreover, weight reduction.

In this embodiment, the pressing element 110 and the shaft 111 are integrally disposed, but of course, the pressing element 110 and the shaft 111 may be separately and fixedly disposed, as long as the shaft 111 can be driven to rotate when the first pedal 11 or the second pedal 21 is stepped on, which is not limited herein.

As shown in fig. 3 to 7 and 9, a surface for accommodating the cleaning device 200 is defined as an upper side of the tray 3, the first lifting structure 1 and the second lifting structure 2 are both disposed below the tray 3, the tray 3 is provided with a first opening 32 and a second opening 33 for the first ejector rod 12 and the second ejector rod 22 to respectively penetrate through, and a first through hole 30 and a second through hole 31 for the first pedal 11 and the second pedal 21 to respectively penetrate through, and the first through hole 30 and the second through hole 31 are respectively located at a side of the first opening 32 and the second opening 33. The first pedal 11 and the second pedal 21 respectively penetrate through the first through hole 30 and the second through hole 31 until being exposed above the tray 3, that is, at least one end of each of the first pedal 11 and the second pedal 21 is higher than the level of the tray 3, that is, one end of the pressing member 110 needs to be higher than the level of the tray 3, so that the first pedal 11 and the second pedal 21 can be automatically pressed/triggered when the cleaning device 200 is parked on the tray 3.

As shown in fig. 2, 5 and 9, a water inlet 201 and a water outlet 202 formed on the cleaning device 200 correspond to the first opening 32 and the second opening 33, respectively, when the cleaning device 200 is received in the tray 3 and touches the first pedal 11 and the second pedal 21, respectively, the first pedal 11 can drive the transmission gear set in the first lifting structure 1 to lift the first push rod 12, so that the first push rod 12 is inserted into the water inlet 201 of the cleaning device 200, and water is filled in the water tank of the cleaning device 200; the second pedal 21 can drive the transmission gear set in the second lifting structure 2 to lift the second push rod 22, so that the second push rod 22 is inserted into the water outlet 202 of the cleaning device 200, so as to trigger the drainage switch in the cleaning device 200, and discharge all the sewage in the cleaning device 200.

The utility model is originally designed as follows: in the cleaning apparatus 200, such as a sweeping robot, a clean water tank and a dirty water tank are generally provided inside thereof for supplying clean water and storing dirty water at the time of cleaning. In the prior art, clear water needs to be manually injected, and sewage needs to be manually discharged, which is very inconvenient, so the utility model improves the water injection structure and the water discharge structure in the base station 100 to realize the automatic water injection and water discharge (namely automatic water change) of the sweeping robot. Of course, the application scenarios of the water injection structure and the water drainage structure are not unique, and the water injection structure and the water drainage structure can be applied to a sweeping robot and other equipment needing automatic water changing, and are not limited to the above.

As shown in fig. 5 to 8, the first top bar 12 and the second top bar 22 are both disposed in a cylindrical shape, and the first top bar 12 and the second top bar 22 are both provided with a cap 121, and a side edge of the cap 121 protrudes out of a clamping edge 122 for preventing the first top bar 12 and the second top bar 22 from being lifted too high. The first opening 32 and the second opening 33 are both circular holes, the clamping edge 122 on the cap 121 is arranged in a circular ring shape, and the outer diameter of the clamping edge 122 is larger than the diameters of the first opening 32 and the second opening 33. With the arrangement, the lifting height of the first and second push rods 12 and 22 can be limited by the mutual abutting of the clamping edge 122 and the inner side wall of the first and second openings 32 and 33, and the sealing function can be achieved during water injection or water drainage, so that water flow is prevented from entering the base station 100.

As shown in fig. 3, 4 and 9, in the present invention, the base station 100 further includes a base 5, and the water injection structure and the water discharge structure are both disposed in the base 5 and are symmetrically disposed. A garbage guiding part 50 is arranged between the water injection structure and the water drainage structure and used for guiding out dust or garbage in the sweeping robot. It can be understood that the tray 3 is provided with a leading-out hole 38 corresponding to the garbage leading-out part 50, and the leading-out hole 38 is located between the first through hole 30 and the second through hole 31 and is used for cooperating with the garbage leading-out part 50 to lead out the dust or garbage inside the sweeping robot together.

As shown in fig. 9 and 10, the tray 3 further has a first groove 34 and a second groove 35 for guiding water flow, and the first groove 34 and the second groove 35 are respectively disposed around the first opening 32 and the second opening 33. Specifically, the first groove 34 is used for leading out clean water, and the second groove 35 is used for leading out sewage. This is because: when the water injection structure injects the clear water into the water tank of the robot for sweeping the floor, some water flows can be hardly avoided to flow out to the tray 3 from the water inlet 201, and at the moment, a small amount of clear water flowing out from the water inlet 201 can be collected by the first groove 34, and the tray 3 is further led out. Similarly, the second groove 35 is used for collecting the sewage flowing out from the water outlet 202 and further guiding the sewage out of the tray 3.

Further, the first groove 34 includes a water collecting groove 340 and a guiding groove 341, the water collecting groove 340 is disposed around the first opening 32 for collecting the clean water flowing out from the water inlet 201, and the guiding groove 341 is communicated with the water collecting groove 340 for guiding the water in the water collecting groove 340 to the tray 3. The second groove 35 has the same structure as the first groove 34 except that the water collecting groove 340 in the second groove 35 is used for collecting and guiding the sewage flowing out from the water outlet 202.

When the cleaning device 200 (sweeping robot) enters the base station 100, in order to be able to stably stop on the first pedal 11 and/or the second pedal 21 and ensure the pressing effect, the tray 3 is further provided with a square groove 36 arranged around the first pedal 11 and the second pedal 21, and the bottom of the square groove 36 is provided with a wavy boss, so that the walking wheel 204 of the sweeping robot can stably stop in the square groove 36 and press the first pedal 11 and the second pedal 21, and the sweeping robot can conveniently go in and out of the tray 3, and the situation that the sweeping robot is clamped in the tray 3 or cannot go in the tray 3 can not be generated.

After the sweeping robot is stably stopped, under the action of gravity, the traveling wheels 204 of the sweeping robot touch and press the first pedal 11 and the second pedal 21, so that the first pedal 11 and the second pedal 21 rotate, and then the first ejector rod 12 and the second ejector rod 22 below the tray 3 are driven to lift upwards, so that the first ejector rod 12 and the second ejector rod 22 are respectively inserted into the water inlet 201 and the water outlet 202 of the cleaning equipment 200 from the first opening 32 and the second opening 33.

When the cleaning device 200 needs to be filled with clean water, the first ejector rod 12 is inserted into the water inlet 201 and then jacks the switch at the position of the water inlet 201, so that the water inlet 201 is communicated with the clean water tank of the cleaning device 200, the water tank (not numbered) in the base station 100 is connected with the first ejector rod 12 through the water pipe 6, and at the moment, the clean water in the water tank can be pumped into the clean water tank of the sweeping robot by using the water pump (not numbered) in the base station 100, namely, the clean water in the base station 100 firstly enters the first ejector rod 12 from the water tank through the water pipe 6 and then flows into the clean water tank of the sweeping robot. That is, the first push rod 12 is disposed in a hollow shape and is communicated with the water tank in the base station 100, so that the clean water tank can be automatically filled with water.

Referring to fig. 2, the sweeping robot is provided with a cleaning unit 203, which includes a motor, a roller surrounding the motor, cleaning objects disposed outside the roller, and a wringing component disposed at the periphery of the cleaning objects, and a sewage recovery pipeline and an injection device are sequentially disposed at the downstream of the wringing component. The cleaning unit 203 is communicated with a clean water tank and a sewage tank of the floor sweeping robot, and after clean water is conveyed to the clean water tank through a water injection structure on the base station 100, the clean water is injected to the cleaning objects in the cleaning unit 203 through the injection device, so that the cleaning objects can be automatically cleaned. In the process of water injection, a small amount or part of the clean water is inevitably discharged to the first groove 34 on the tray 3, and part of the clean water is firstly collected in the water collection tank 340 and then flows out of the tray 3 from the diversion trench 341. By the arrangement, the tray 3 can be kept dry basically, the base station 100 cannot be damaged, and the service life of the base station 100 is effectively prolonged.

The sewage recovery pipeline in the cleaning unit 203 is communicated with the water squeezing part, the water squeezing part is used for squeezing water for cleaned cleaning objects, formed sewage flows into the sewage recovery pipeline from the water squeezing part, a sewage storage tank is arranged below the sewage recovery pipeline and is communicated with a sewage tank in the sweeping robot, and therefore the sewage flows into the sewage storage tank after flowing through the sewage recovery pipeline and finally flows into the sewage tank in a centralized mode. When the cleaning device 200 enters the tray 3 of the base station 100, the second push rod 22 is inserted into the water outlet 202, and the water outlet 202 is communicated with the sewage tank of the cleaning device 200, so that the second push rod 22 pushes open the sealing ring at the water outlet 202, and sewage can flow out from the water outlet 202 and be discharged into the second groove 35 on the tray 3. That is, the second lift pin 22 opens the foul water tank, and then the foul water is discharged into the base station 100. Specifically, the sewage flows into the water collecting tank 340 of the second groove 35 in a concentrated manner, then flows out of the tray 3 from the flow guide groove 341, and finally is pumped into the sewage storage tank of the base station 100 by the air pump in the sweeping robot for storage and concentrated discharge.

When the water adding and/or draining of the sweeping robot is completed, the sweeping robot leaves the first pedal 11 and the second pedal 21, at the moment, the first pedal 11 and the second pedal 21 reset, the first ejector rod 12 and the second ejector rod 22 are separated from the water inlet 201 and the water outlet 202, and reset to the initial state, namely, the first lifting structure 1 and the second lifting structure 2 are reset. The water injection structure and the water discharge structure of the present invention may be used to simultaneously inject water and discharge water into the cleaning device 200, or may be used to separately inject water or discharge water according to actual needs, which is not limited to this.

With reference to fig. 4 and 5, the accommodating chamber 4 is further disposed below the tray 3, the accommodating chamber 4 is communicated with the first groove 34 and the second groove 35 on the tray 3, and preferably, the flow guide grooves 341 of the first groove 34 and the second groove 35 are communicated with the accommodating chamber 4, so that the clean water concentrated in the first groove 34 and the sewage concentrated in the second groove 35 can all flow into the accommodating chamber 4 to be collected in a concentrated manner. In order to better discharge water in the diversion trench 341 out of the tray 3, a water discharge hole 37 is further disposed at a communication position between the diversion trench 341 and the accommodating chamber 4, so that water in the first groove 34 and the second groove 35 can smoothly flow out of the tray 3 through the water discharge hole 37 and flow into the accommodating chamber 4 to be concentrated. The accommodating chamber 4 is provided with a drawing pipe 40 for drawing the sewage in the accommodating chamber 4, and the drawing pipe 40 is communicated with a sewage storage tank in the base station 100. In summary, the sewage can be discharged from the water outlet 202 and flow into the second groove 35 and the accommodating cavity 4 under the action of the second top bar 22, and the sewage can be pumped out from the accommodating cavity 4 to the sewage storage tank of the base station 100 through the pumping-out pipe 40 under the action of the air pump in the base station 100. Of course, a small amount of clean water flowing out of the first groove 34 can also be discharged to the accommodating cavity 4 through the diversion trench 341, and is pumped away together with the sewage.

The above is a description of a specific structure of the water filling structure and the water discharging structure and a preferred embodiment of the operation process in the present invention. Of course, in other embodiments, the first lifting structure 1 in the water filling structure and the second lifting structure 2 in the water draining structure may also be configured to be pressed down or lifted up by controlling the pedal through the motor, so as to drive the transmission gear set downstream of the pedal to rotate, and then the first push rod 12 or the second push rod 22 is lifted up or lowered down, so as to further complete the functions of filling clean water and draining sewage, which is not limited herein and will not be illustrated.

In summary, the present invention can not only perform the function of storing the cleaning apparatus 200, but also automatically perform the functions of adding water and draining the cleaning apparatus 200 while storing the cleaning apparatus by providing the water injection structure and the water drainage structure. In addition, set up simple structure and exquisite promotion structure in water injection structure and drainage structure, effectively alleviateed base station 100's weight, strengthened the user and used experience and felt, but also prolonged base station 100's life, had apparent practicality and economic nature.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (10)

1. The utility model provides a drainage structures is applied to cleaning device, cleaning device is equipped with water tank and delivery port, its characterized in that: the drainage structure comprises a tray for accommodating cleaning equipment, an ejector rod movably connected with the tray and a transmission structure connected with the ejector rod, wherein the tray is provided with a through hole for the transmission structure to penetrate out and an opening for the ejector rod to penetrate out; the water outlet of the cleaning device corresponds to the open hole, so that when the cleaning device is stored in the tray and triggers the transmission structure, the transmission structure can lift the ejector rod to open the drainage switch in the cleaning device.

2. The drainage structure according to claim 1, wherein: the transmission structure comprises a transmission gear set connected with the ejector rod and a pedal connected with the transmission gear set; the pedal comprises a pressing piece and a shaft rod, the transmission gear set comprises a first transmission gear and a second transmission gear meshed with the first transmission gear, a through hole is formed in the first transmission gear, and the shaft rod penetrates through the through hole and is fixedly connected with the first transmission gear.

3. The drainage structure according to claim 2, wherein: the transmission gear set further comprises a connecting plate which is connected with the second transmission gear and the ejector rod, and one end of the connecting plate is provided with a fixing groove for fixing the ejector rod; one end of the ejector rod is provided with a positioning shaft, and the positioning shaft is clamped into the fixing groove so as to movably connect the ejector rod with the connecting plate.

4. The drainage structure according to claim 3, wherein: the perforation is square setting, the axostylus axostyle passes fenestrate one end also is square setting, first drive gear is equipped with the sawtooth of half round, presses behind the pressing part the axostylus axostyle rotates to drive first drive gear with second drive gear rotates, so that the connecting plate perk drives the ejector pin promotes.

5. The drainage structure according to claim 4, wherein: the second transmission gear is also provided with sawteeth of half wheels, and the sawteeth of the second transmission gear are meshed with the sawteeth of the first transmission gear.

6. The drainage structure according to claim 2, wherein: the pressing piece penetrates out of the through hole until at least one end of the pressing piece is higher than the horizontal plane where the tray is located.

7. The drainage structure according to claim 1, wherein: the tray is also provided with a groove for collecting and leading out water flow overflowing during drainage, and the groove is arranged around the open hole; the groove comprises a water collecting tank and a guide groove, the water collecting tank surrounds the opening and is arranged on the ejector rod and used for collecting water flow flowing out of the water outlet, and the guide groove is communicated with the water collecting tank and used for guiding the water flow in the water collecting tank to be discharged from the tray.

8. The drainage structure according to claim 1, wherein: the ejector rod is provided with a cap, the side edge of the cap protrudes and extends to form a clamping edge, and the clamping edge is used for abutting against the open hole when the ejector rod penetrates out, so that the penetrating height of the ejector rod is limited.

9. The drainage structure according to claim 8, wherein: the ejector rod is arranged in a cylindrical mode, the opening is a round hole, the clamping edge is arranged in a circular ring mode, and the outer diameter of the clamping edge is larger than that of the opening.

10. A base station for housing a cleaning apparatus, characterized by: the base station comprises the drainage structure of any one of claims 1 to 9.

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