U.S. patent application number 17/625082 was filed with the patent office on 2022-09-08 for cleaning device.
The applicant listed for this patent is MIDEA ROBOZONE TECHNOLOGY CO., LTD.. Invention is credited to Xianmin WEI, Meng ZHANG.
Application Number | 20220280012 17/625082 |
Document ID | / |
Family ID | 1000006406687 |
Filed Date | 2022-09-08 |
United States Patent
Application |
20220280012 |
Kind Code |
A1 |
ZHANG; Meng ; et
al. |
September 8, 2022 |
CLEANING DEVICE
Abstract
A cleaning device, including a water pumping apparatus, a
cleaning area and a work execution mechanism. The water pumping
apparatus includes a receiving part and a transitional connecting
mechanism. An accommodating space and a water outlet that
communicates with the accommodating space are formed in the
receiving part, and the water outlet communicates with the cleaning
area. The transitional connecting mechanism is in drive connection
with the work execution mechanism, and the transitional connecting
mechanism may pump water in the accommodating space into the
cleaning area under the drive of the work execution mechanism. The
cleaning device uses the ready-made work execution mechanism as a
power source, and drives a water pumping operation by means of the
transitional connecting mechanism without the need for control by
means of a control circuit. The apparatus has high structural
reliability and low fabrication costs.
Inventors: |
ZHANG; Meng; (SUZHOU,
CN) ; WEI; Xianmin; (SUZHOU, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
MIDEA ROBOZONE TECHNOLOGY CO., LTD. |
SUZHOU |
|
CN |
|
|
Family ID: |
1000006406687 |
Appl. No.: |
17/625082 |
Filed: |
April 7, 2020 |
PCT Filed: |
April 7, 2020 |
PCT NO: |
PCT/CN2020/083519 |
371 Date: |
January 5, 2022 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47L 2201/00 20130101;
A47L 11/28 20130101; A47L 11/4041 20130101; A47L 11/4072 20130101;
A47L 11/4088 20130101 |
International
Class: |
A47L 11/40 20060101
A47L011/40; A47L 11/28 20060101 A47L011/28 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 10, 2019 |
CN |
201910621671.2 |
Claims
1. A cleaning device, comprising a cleaning area, an execution
mechanism and a water pumping device; wherein the water pumping
device comprises: an accommodating portion, the accommodating
portion being provided with an accommodating space, and a water
outlet that is in communication with the accommodating and in
communication with the cleaning area; and a transitional connecting
mechanism, the transitional connecting mechanism being connected to
the execution mechanism and configured to be driven by the
execution mechanism, wherein the transitional connecting mechanism
is configured to pump water in the accommodating space to the
cleaning area under the drive of the execution mechanism.
2. The cleaning device of claim 1, wherein the execution mechanism
comprises at least one of a traveling wheel and a roller brush.
3. The cleaning device of claim 1, wherein the water pumping device
comprises a water pumping portion, the transitional connecting
mechanism is connected between the execution mechanism and the
water pumping portion; the water pumping portion is movably
arranged in the accommodating space, the accommodating portion and
the water pumping portion jointly define a water reservoir cavity,
and the water pumping portion is configured to pump water in the
water reservoir cavity to the cleaning area.
4. The cleaning device of claim 3, wherein the accommodating
portion is cylindrical, the water pumping portion is a piston, and
the piston reciprocates linearly in the accommodating portion.
5. The cleaning device of claim 4, wherein the transitional
connecting mechanism is a crank, a first end of the crank is
connected to a side of the piston facing away from the water
reservoir cavity, a second end of the crank is rotatably connected
to the execution mechanism, the execution mechanism has a first
rotation axis, the second end of the crank has a second rotation
axis, the first rotation axis and the second rotation axis are
eccentric with respect to one another, and the execution mechanism
drives, by means of the crank, the piston to reciprocate
linearly.
6. The cleaning device of claim 4, wherein the transitional
connecting mechanism comprises a cam, a sliding rod and an elastic
member, a first end of the sliding rod is rotatably connected with
the piston, and the elastic member applies a force toward the cam
on the sliding rod to press a second end of the sliding rod against
a circumferential surface of the cam, the execution mechanism has a
first rotation axis, the cam is coaxially and fixedly connected to
the execution mechanism, and the execution mechanism drives, by
means of the cam and the sliding rod, the piston to reciprocate
linearly.
7. The cleaning device of claim 3, wherein the accommodating
portion is in a volute shape, the water pumping portion is a rotor,
the rotor rotates in the accommodating portion, and the rotor pumps
the water in the water reservoir cavity to the cleaning area during
rotation.
8. The cleaning device of claim 7, wherein the execution mechanism
has a first rotation axis, the rotor has a third rotation axis, the
first rotation axis and the third rotation axis are parallel to but
eccentric with respect one another, and the transitional connecting
mechanism is configured to transmit a torque of the execution
mechanism to the rotor.
9. The cleaning device of claim 8, wherein the transitional
connecting mechanism is a conveyor belt or a gear structure.
10. The cleaning device of claim 3, wherein the cleaning device
comprises a water tank, the accommodating portion is formed to be
at least a part of the water tank, and the water pumping portion is
located in the water tank.
11. The cleaning device of claim 3, wherein the cleaning device
comprises a water tank, the accommodating portion is located
outside of the water tank, the accommodating portion is provided
with a water inlet that is in communication with the water
reservoir cavity and in communication with the water tank.
12. The cleaning device of claim 11, wherein the water pumping
device comprises a first check valve, the first check valve is
arranged in a waterway between the water inlet and the water tank;
and/or the water pumping device comprises a second check valve, the
second check valve is arranged in a water way between the water
outlet and the cleaning area.
13. The cleaning device of claim 11, wherein the accommodating
portion is cylindrical, the water pumping portion is a piston, the
piston reciprocates linearly in the accommodating portion, and the
piston alternately introduces the water in the water tank into a
water supply cavity and pumps the water in the water reservoir
cavity into the cleaning area.
14. The cleaning device of claim 13, wherein the water inlet and
the water outlet are arranged at an end of the accommodating
portion in a sliding direction of the piston.
15. The cleaning device of claim 1, wherein the execution mechanism
is a traveling wheel, and the transitional connecting mechanism is
connected to a side of the traveling wheel in an axial
direction.
16. The cleaning device of claim 15, wherein the transitional
connecting mechanism is connected to an axial inner side of the
traveling wheel.
17. The cleaning device of claim 1, wherein the cleaning device is
a floor cleaning robot or a window cleaning robot.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] The present disclosure is a national phase application of
International Application No. PCT/CN2020/083519, filed on Apr. 7,
2020, which claims priority to Chinese Patent Application No.
201910621671.2, filed on Jul. 10, 2019, the entireties of which are
herein incorporated by reference.
FIELD
[0002] The present application relates to the field of cleaning
technology, and in particular to a cleaning device.
BACKGROUND
[0003] A floor cleaning robot is taken as an example. The floor
cleaning robot is provided with a water tank and a water pump. A
cleaning cloth is installed at the bottom of the floor cleaning
robot, a water inlet pipe of the water pump is connected to the
water tank, and a drain pipe of the water pump is connected to the
cleaning cloth. When the floor cleaning robot mops the floor, water
or cleaning agent in the water tank is pumped to the cleaning cloth
by means of the water pump, supplying water to the cleaning cloth.
The supply amount of water to the cleaning cloth is determined by
the displacement and the working time of the water pump.
[0004] As an electronic component, the water pump has relatively
low reliability under different temperature and humidity condition,
which may reduce the working reliability of the floor cleaning
robot and affect user experience.
SUMMARY
[0005] In view of the above, embodiments of the present application
desire to provide a cleaning device having high cleaning
reliability.
[0006] In order to achieve the above objective, an embodiment of
the present application provides a cleaning device, including a
water pumping device, a cleaning area and an execution mechanism.
The water pumping device includes an accommodating portion and a
transitional connecting mechanism. An accommodating space and a
water outlet in communication with the accommodating space are
formed in the accommodating portion, and the water outlet is also
in communication with the cleaning area. The transitional
connecting mechanism is connected to the execution mechanism and
configured to be driven by the execution mechanism, and the
transitional connecting mechanism may configured to pump water in
the accommodating space to the cleaning area under the drive of the
execution mechanism.
[0007] In some embodiments, the execution mechanism includes at
least one of a traveling wheel and a roller brush.
[0008] In some embodiments, the water pumping device includes a
water pumping portion, the transitional connecting mechanism is
connected between the execution mechanism and the water pumping
portion; the water pumping portion is movably arranged in the
accommodating space, the accommodating portion and the water
pumping portion jointly define a water reservoir cavity, and the
water pumping portion is configured to pump water in the water
reservoir cavity to the cleaning area.
[0009] In some embodiments, the accommodating portion is
cylindrical, the water pumping portion is a piston, and the piston
reciprocates linearly in the accommodating portion.
[0010] In some embodiment, the transitional connecting mechanism is
a crank, a first end of the crank is connected to a side of the
piston facing away from the water reservoir cavity, a second end of
the crank is rotatably connected to the execution mechanism, the
execution mechanism has a first rotation axis, a second end of the
crank has a second rotation axis, the first rotation axis and the
second rotation axis are eccentric with respect to one another, and
the execution mechanism drives the piston to reciprocate linearly
by means of the crank.
[0011] In some embodiments, the transitional connecting mechanism
includes a cam, a sliding rod and an elastic member, one end of the
sliding rod is rotatably connected to the piston, and the elastic
member applies a force toward the cam on the sliding rod to press
the other end of the sliding rod against a circumferential surface
of the cam, the execution mechanism has the first rotation axis,
the cam is coaxially and fixedly connected to the execution
mechanism, and the execution mechanism drives the piston by means
of the cam and the sliding rod to reciprocate linearly.
[0012] In some embodiments, the accommodating portion is in a
volute shape, the water pumping portion is a rotor, the rotor
rotates in the accommodating portion, and the rotor pumps the water
in the water reservoir cavity to the cleaning area during
rotation.
[0013] In some embodiments, the execution mechanism has the first
rotation axis, the rotor has a third rotation axis, the first
rotation axis and the third rotation axis are parallel to but
eccentric with respect one another, and the transitional connecting
mechanism is configured to transmit torque of the execution
mechanism to the rotor.
[0014] In some embodiments, the transitional connecting mechanism
is a conveyor belt or a gear structure.
[0015] In some embodiments, the cleaning device includes a water
tank, the accommodating portion is formed to be at least a part of
the water tank, and the water pumping portion is located in the
water tank.
[0016] In some embodiments, the cleaning device includes a water
tank, the accommodating portion is located outside the water tank,
the accommodating portion is provided with a water inlet that is in
communication with the water reservoir cavity, and in communication
with the water tank.
[0017] In some embodiments, the water pumping device includes a
first check valve, and the first check valve is arranged in a
waterway between the water inlet and the water tank; and/or the
water pumping device includes a second check valve, and the second
check valve is arranged in a waterway between the water outlet and
the cleaning area.
[0018] In some embodiments, the accommodating portion is
cylindrical in shape, the water pumping portion is a piston, and
the piston reciprocates linearly in the accommodating portion, and
the piston alternately introduces the water in the water tank into
a water supply cavity and pumps the water in the water reservoir
cavity into the cleaning area.
[0019] In some embodiments, the water inlet and the water outlet
are arranged at an end of the accommodating portion in a sliding
direction of the piston.
[0020] In some embodiments, the execution mechanism is a traveling
wheel, and the transitional connecting mechanism is connected to a
side of the traveling wheel in an axial direction.
[0021] In some embodiments, the transitional connecting mechanism
is connected to an axial inner side of the traveling wheel.
[0022] In some embodiments, the cleaning device is a floor cleaning
robot or a window cleaning robot.
[0023] The cleaning device of the embodiments of the present
application uses the existing execution mechanism as a power
source, to allow a water pumping operation by means of the
transitional connecting mechanism, that is, the embodiments of the
present application use a mechanical manner to drive the water
pumping action. The supply amount of water desired by the cleaning
area is determined by the action of the execution mechanism and the
volume of the accommodating space for storing water, without using
a control circuit. Compared with the water pump water supply method
in conventional art, the water pumping device of the embodiments of
the present application has high structural reliability and
practicability, and low fabrication costs, which is conducive to
popularization and use.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 is a partial schematic view of a cleaning device of
an embodiment of the present application, in which a first rotation
axis is reducible to point O1, and a second rotation axis is
reducible to point O2.
[0025] FIG. 2 is a schematic view of a water pumping device and a
traveling wheel of an embodiment of the present application.
[0026] FIG. 3 is a schematic view of a water pumping device and a
traveling wheel of another embodiment of the present application,
in which a first rotation axis is reducible to point O1.
DESCRIPTION OF REFERENCE NUMERALS
[0027] Water tank 11; Bracket 12; Cleaning area 10a; Execution
mechanism 20; Traveling wheel 20'; Water pumping device 30;
Accommodating portion 31; Accommodating space 310; Water reservoir
cavity 311; Water inlet 31a; Water outlet 30b; Water pumping
portion 32; Piston 32'; Transitional connecting mechanism 33; Crank
33'; Cam 331; Sliding rod 332; Flange structure 3321; Elastic
member 333; First check valve 34; Second check valve 35; Water
inlet pipe 36; Water outlet pipe 37; Cleaning member 40
DETAILED DESCRIPTION OF THE DISCLOSURE
[0028] It is to be noted that embodiments in the present
application and features in the embodiments may be combined with
each other if there is no conflict. The detailed description in the
embodiments should be understood as an explanation of the purpose
of the present application and should not be regarded as an
improper limitation of the present application.
[0029] The embodiments of the present application provide a
cleaning device, which may be configured to clean items to be
cleaned such as floor, glass and the like, and when the cleaning
device works, the cleaning device is placed on a surface of the
cleaning media.
[0030] The cleaning device may be a floor cleaning robot, a window
cleaning robot, or may be a similar type of device, which is not
limited herein. In the embodiments of the present application, a
floor cleaning robot is taken as an example of the cleaning
device.
[0031] Referring to FIG. 1, a cleaning device includes a water
pumping device 30, a cleaning area 10a and an execution mechanism
20. The water pumping device 30 includes an accommodating portion
31 and a transitional connecting mechanism 33. An accommodating
space 310 and a water outlet 30b in communication with the
accommodating space 310 are formed in the accommodating portion 31,
and the water outlet 30b is in communication with the cleaning area
10a, for example, by means of a water outlet pipe 37. The
transitional connecting mechanism 33 is in connection with the
execution mechanism 20, and the transitional connecting mechanism
33 may pump water in the accommodating space 310 to the cleaning
area 10a under the drive of the execution mechanism 20.
[0032] The cleaning device of the embodiments of the present
application uses the existing execution mechanism 20 as a power
source, to allow a water pumping operation by means of the
transitional connecting mechanism 33. The supply amount of water
desired by the cleaning area 10a is determined by the action of the
execution mechanism 20 and the volume of the accommodating space
310 for storing water, without using a control circuit. Compared
with the water pump water supply method in conventional art, the
water pumping device 30 of the embodiments of the present
application has high structural reliability and practicability, and
low fabrication costs, which is conducive to popularization and
use.
[0033] It should be noted that the execution mechanism 20 refers to
an external execution mechanism for realizing the cleaning function
of the cleaning device, for example, a traveling wheel 20' or a
roller brush. The traveling wheel 20' executes the traveling
function of the cleaning device, the cleaning device may realize
continuous cleaning work by traveling of the traveling wheel 20';
and the roller brush may allow the cleaning device to wipe and
clean the items.
[0034] The cleaning area 10a refers to the area configured to
contact the cleaning member 40.
[0035] The cleaning member 40 may be cleaning cloth, sponge, etc.
For example, referring to FIG. 1, the cleaning area 10a may be the
bottom of a bracket 12 for installing the cleaning member 40.
Before the cleaning device works normally, the cleaning member 40
is installed at the bottom of the bracket 12, the water in the
accommodating space 310 is pumped to the cleaning area 10a, and the
water pumped to the cleaning area 10a is absorbed by the cleaning
member 40. Then, during the traveling process of the cleaning
device, the cleaning member 40 wipes and cleans the items to be
cleaned.
[0036] It should be noted that the transitional connecting
mechanism 33 may pump the water in the accommodating space 310 to
the cleaning area 10a by an additional structure, or may pump the
water in the accommodating space 310 to the cleaning area 10a
without additional structure. For example, the transitional
connecting mechanism 33 is driven by the execution mechanism 20 to
continuously pump air or other gas to the accommodating space 310
unidirectionally, and the water is the accommodating space 310 is
pumped to the cleaning area 10a under air pressure.
[0037] In the embodiments of the present application, the
transitional connecting mechanism 33 pumps the water in the
accommodating space 310 to the cleaning area 10a by the additional
structure. In one embodiment, the water pumping device 30 includes
a water pumping portion 32 movably arranged in the accommodating
space 310. The water pumping portion 32 and the accommodating
portion 31 together define a water reservoir cavity 311. The water
pumping portion 32 can pump the water in the water reservoir cavity
311 to the cleaning area 10a, that is, the transitional connecting
mechanism 33 pumps the water in the accommodating space 310 to the
cleaning area 10a by the water pumping portion 32. In the
embodiments of the present application, the power is transmitted to
the water pumping portion 32 by means of the transitional
connecting mechanism 33, and then the Water pumping portion 32 is
driven to perform drainage operation. In this way, a greater
pressure may be directly applied to the water in the water
reservoir cavity 311, and the water in the water reservoir cavity
311 may be reliably pumped to the cleaning area 10a.
[0038] The specific structure of the accommodating portion 31 is
not limited thereto, as long as it can contain a volume of water.
In some embodiments, the cleaning device includes a water tank 11,
in which a volume of water or cleaning liquid is pre-stored. For
ease of description, the embodiments of the present application are
described by taking water as an example. The accommodating portion
31 may be at least a part of the structure of the water tank 11.
For example, a part of the space in the water tank 11 is isolated
to form the accommodating space of the accommodating portion 31,
and the pre-stored water in the water tank 11 enters into the water
reservoir cavity 311 through a through-hole with a diameter. In
another example, the water tank 11 itself is the accommodating
portion 31, and the space in the water tank 11 is the
above-accommodating space 311.
[0039] In another example, referring to FIG. 1, in the embodiments
of the present application, the accommodating portion 31 is located
outside the water tank 11, the accommodating portion 31 is provided
with a water inlet 31a in communication with the water reservoir
cavity 311. The water inlet 31a is in communication with the water
tank 11. It should be understood that the accommodating portion 31
may be fixedly connected to the water tank 11, or may be spaced
apart from the water tank 11, which is not limited herein. In the
embodiments of the present application, the accommodating portion
31 is arranged on the outer side of the water tank 11, and, on the
one hand, the water tank 11 is able to have a large volume in the
limited space of the cleaning device and the water storage capacity
is improved, on the other hand, relative positions between the
water tank 11, the cleaning area 10a and the accommodating portion
31 may be flexibly arranged as long as the water tank, the cleaning
area and the accommodating portion are in communication with one
another by corresponding pipelines, and the structural design of
the cleaning device can be more flexible, and the structural layout
of the cleaning device can be more reasonable and compact.
[0040] In the embodiments of the present application, the execution
mechanism 20 is a traveling wheel 20', and the transitional
connecting mechanism 33 is connected to the traveling wheel 20'.
The rotation of the traveling wheel 20' is associated with the
travel distance of the cleaning device, and the movement amplitude
of the water pumping portion 32 is associated with the travel
distance of the cleaning device. In one embodiment, when the
cleaning device does not travel, the traveling wheel 20' is
stationary, the transitional connecting mechanism 33 remains
stationary, and thus the water pumping portion 32 does not move. At
this time, the cleaning member 40 does not perform wiping and
cleaning work, and the water pumping device 30 does not output
water to the cleaning area 10a. When the cleaning device travels a
short distance, the rotation amplitude of the traveling wheel 20'
is small, and the movement distance of the water pumping portion 32
is also short, so the amount of outputted water pumped by the water
pumping device 30 to the cleaning area 10a is also relatively
small. In the case that the cleaning device travels a short
distance, the supply amount of water desired by the cleaning member
40 is also small, and the amount of water outputted by the water
pumping device 30 to the cleaning member 40 can be better matched
with the supply amount of water desired by the cleaning member 40.
Similarly, when the cleaning device travels a large distance, the
amount of outputted water pumped by the water pumping device 30 to
the cleaning area 10a is large, and the supply amount of water
desired by the cleaning member 40 is also large.
[0041] In one embodiment, the transitional connecting mechanism 33
is connected to a side of the traveling wheel 20' in its axial
direction, which facilitates the connection between the
transitional connecting mechanism 33 and the traveling wheel 20.
Further, the transitional connecting mechanism 33 is connected to
an axial inner side of the traveling wheel 20', and the
transitional connecting mechanism 33 will not be exposed to the
outer side of the cleaning device. In the working process of the
cleaning device, the transitional connecting mechanism 33 will not
interfere with other objects in the external environment. Moreover,
the layout of the water pumping device 30 is more reasonable and
compact.
[0042] The accommodating portion 31 and the water pumping portion
32 may be in various forms. For example, in one embodiment, the
accommodating portion is cylindrical, and correspondingly, the
water pumping portion 32 is a piston 32'. In another embodiment,
the accommodating portion 31 is volute, and the water pumping
portion 32 is a rotor.
[0043] Relative positions of the water tank 11, the execution
mechanism 20, the transitional connecting mechanism 33, and the
cleaning area 10a may be appropriately changed as required.
[0044] The embodiments of the present application will be described
below in conjunction with the drawings.
[0045] Referring to FIG. 1 and FIG. 2, in this embodiment, the
accommodating portion 31 is located outside the water tank 11. The
accommodating portion 31 is cylindrical, one end of the
accommodating portion 31 is a closed end, and the other end is an
open end. The water pumping portion 32 is a piston 32', and the
piston 32' reciprocates linearly in the accommodating portion 31,
and the piston 32' alternately introduces the water in the water
tank 11 into the water reservoir cavity 311 and then pumps the
water in the water reservoir cavity 311 to the cleaning area 10a.
That is to say, at the same time, the operation of introducing the
water in the water tank 11 into the water reservoir cavity 311 and
the operation of pumping the water in the water reservoir cavity
311 to the cleaning area 10a cannot be performed simultaneously. In
one embodiment, when the transitional connecting mechanism 33
drives the piston 32' to slide along a first direction (towards
left side in FIG. 1), the volume of the water reservoir cavity 311
is increased, resulting in that a negative pressure is formed in
the water reservoir cavity 311. The water in the water tank 11 is
sucked into the water reservoir cavity 311 under the negative
pressure. In this process, a waterway between the water outlet 30b
and the cleaning area 10a is in a cut-off state. When the
transitional connecting mechanism 33 drives the piston 32' to slide
along a second direction (towards right side in FIG. 1), the piston
32' exerts a force onto the water in the water reservoir cavity
311, and a water pressure suffice to pump the water to the cleaning
area 10a is generated in the water in the water reservoir cavity
311. In this process, the waterway between the water inlet 31a and
the water tank 11 is in a cut-off state.
[0046] In order to facilitate the opening and closing control of
the waterway between the water inlet 31a and the water tank 11, and
to facilitate the opening and closing control of the waterway
between the water outlet 30b and the cleaning area 10a, valves may
be arranged in the corresponding waterways to open or close them in
time. The structure type of the valve is not limited, which may be
an electric control valve, a hydraulic control valve and the
like.
[0047] In this embodiment, the water pumping device 30 includes a
first check valve 34, the first check valve 34 is a hydraulic
control valve, that is, it may be opened and closed without
electromagnetic control. The first check valve 34 is arranged in
the waterway between the water inlet 31a and the water tank 11. It
should be understood that the first check valve 34 can allow water
to flow unidirectionally from the side of the water tank 11 to the
side of the water inlet 31a, that is, a liquid inlet end of the
first check valve 34 is in communication with the water tank 11,
and a liquid outlet end of the first check valve 34 is in
communication with the water inlet 31a. The first check valve 34 is
simple in structure, does not require electric control, and can be
automatically opened and closed according to water pressure. For
example, when the negative pressure in the water containing chamber
311 is greater than an opening pressure of the first check valve
34, the first check valve 34 is opened, and the water in the water
tank 11 enters into the water reservoir cavity 311 through the
first check valve 34 under the negative pressure of the water
reservoir cavity 311. When a water pressure is generated in the
water in the water reservoir cavity 311, the water pressure
reversely acts on the first check valve 34, then the first check
valve 34 is closed. The water pressure in the water tank 11 is
insufficient to open the first check valve 34, and therefore, the
first check valve 34 can stably and reliably and automatically stay
in a cut-off state.
[0048] The water pumping device 30 includes a second check valve
35, which is arranged in a waterway between the water outlet 30b
and the cleaning area 10a. The action principle and working process
of the second check valve 35 are similar to those of the first
check valve 34, and details will not be repeated here.
[0049] It should be understood that a combination of valves may be
selected according to requirement. For example, in some
embodiments, the above-mentioned second check valve 35 may be
arranged in the waterway between the water outlet 30b and the
cleaning area 10a, and an electric control valve or hydraulic
control valve of other type is arranged in the waterway between the
water inlet 31a and the water tank 11. In another embodiment, the
above-mentioned first check valve 34 may be arranged in the
waterway between the water inlet 31a and the water tank 11, while
an electric control valve or electric control valve of other type
is arranged in the waterway between the water outlet 30b and the
cleaning area 10a.
[0050] The water outlet 30b is taken as an example. If the water
outlet 30b is located on a sidewall of the accommodating portion
31, that is, a position at a non-closed end. When the piston 32'
moves toward the closed end, if the piston 32' moves to block the
water outlet 30b by a periphery of the piston 32', the water in the
water reservoir cavity 311 cannot be discharged. Then, if the
piston 32' is driven by the transitional connecting mechanism 33 to
continue moving toward the closed end, the water in the water
reservoir cavity 311 is compressed, the water pressure continues to
rise, this may damage the piston 32', the accommodating portion 31,
or the above-mentioned valve. Therefore, the device should be
designed in such a way that the movement amplitude of the piston
32' cannot reach the water outlet 30b, but this will result in an
increase in the size of the accommodating portion 31 in the
movement direction of the piston 32' under the same conditions.
[0051] Therefore, in the embodiments of the present application,
the water inlet 31a and the water outlet 30b are arranged at the
end of the accommodating portion 31 in a sliding direction of the
piston 32', that is, arranged at the closed end of the
accommodating portion 31, and the piston 32' can keep moving to a
position in contact with the closed end, can make the structure of
the accommodating portion 31 more compact under the same
conditions, and can also prevent the water in water reservoir
cavity 311 from being unduly compressed.
[0052] In the embodiment of the present application, referring to
FIG. 2, the transitional connecting mechanism 33 is a crank 33'. In
one embodiment, one end of the crank 33' is connected to one side
of the piston 32' facing away from the water reservoir cavity 311,
and the other end of the crank 33' is rotatably connected to the
execution mechanism 20. The execution mechanism 20 has a first
rotation axis (referring to 01 in FIG. 1), that is, the execution
mechanism 20 is rotatable about the first rotation axis. The second
end of the crank 33' has a second rotation axis (referring to point
02 in FIG. 1), the first rotation axis and the second rotation axis
are eccentric with respect to one another, that is, when the crank
33' rotates with the rotation of the execution mechanism 20, it
revolves around the first rotation axis and rotates about the
second rotation axis. The execution mechanism 20 drives the piston
32' by means of the crank 33' to reciprocate linearly, that is to
say, the execution mechanism 20, the crank 33' and the piston 32'
form a slider-crank structure, and the crank 33' can convert the
rotational movement of the execution mechanism 20 into a linear
sliding movement of the piston 32'.
[0053] In this embodiment, the execution mechanism 20 is a
traveling wheel 20'. It should be understood that the execution
mechanism 20 may also be a roller brush or execution mechanism 20
of other type.
[0054] Referring to FIG. 3, the difference from one embodiment is
that the transitional connecting mechanism 33 includes a cam 331, a
sliding rod 332 and an elastic member 333. One end of the sliding
rod 332 is rotatably connected (for example, hinged) with the
piston 32'. The elastic member 333 applies a force toward the cam
331 on the sliding rod 332 to press the other end of the sliding
rod 332 against a circumferential surface of the cam 331. The
execution mechanism 20 has a first rotation axis, the cam 331 is
coaxially and fixedly connected to the execution mechanism 20. That
is, the execution mechanism 20 rotates about the first rotation
axis, and the cam 331 also rotates about the first rotation
axis.
[0055] Since the shape of the circumferential surface of the cam
331 is non-circular, the sliding rod 332 reciprocates linearly
under the combined action of the elastic member 333 and the cam 331
when the cam 331 spins about the first rotation axis, driving the
piston 32' to reciprocate linearly.
[0056] In the embodiment of the present application, the elastic
member 333 is a spring mounted around the sliding rod 332. The
sliding rod 332 guides the telescopic movement of the spring, to
improve the reliability of the spring. One end of the spring abuts
against a side of the piston 32' facing away from the water
reservoir cavity 311. Further, continuing to refer to FIG. 3, a
flange structure 3321 is formed in a circumferential direction of
the sliding rod 332, and the other end of the spring abuts against
a side of the flange structure 3321 facing the accommodating
portion 31, that is, the spring is sandwiched between the flange
structure 3321 and the piston 32'.
[0057] The difference from one embodiment, the accommodating
portion 31 is in a volute shape, and the water pumping portion 32
is a rotor. The rotor rotates in the accommodating portion 31, and
synchronously introduces water in the water tank 11 into the water
reservoir cavity 311 and pumps the water in the water reservoir
cavity 311 to the cleaning area 10a. That is, while the rotor is
performing the operation process of introducing the water in the
water tank 11 into the water reservoir cavity 311, it also performs
the operation process of pumping the water in the water reservoir
cavity 311 to the cleaning area 10a. The above two operation
processes are performed simultaneously.
[0058] In this embodiment, the water inlet 31a and the water outlet
30b are respectively located on opposite sides of the rotor. The
rotor divides the accommodating space 310 into a first cavity and a
second cavity. The first cavity and the second cavity together form
a water reservoir cavity 311. That is to say, the water inlet 31a
is in communication with the first cavity, and the water outlet 30b
is in communication with the second cavity. When the rotor rotates,
the rotor squeezes water in the first cavity into the second
cavity, and a negative pressure is generated in the first cavity.
The water in the water tank 11 is sucked into the first cavity
under the negative pressure, water in the second cavity has a water
pressure, and the water in the second cavity is pumped to the
cleaning area 10a under the water pressure.
[0059] The execution mechanism 20 has a first rotation axis, the
rotor has a third rotation axis, the first rotation axis and the
third rotation axis are parallel to but eccentric with respect to
one another. The transitional connecting mechanism 33 can transmit
torque of the execution mechanism 20 to the rotor. That is, the
transitional connecting mechanism 33 is a torque transmission
structure, for example, the transitional connecting mechanism 33 is
a conveyor belt or a gear structure.
[0060] The various embodiments/implementations provided in the
present application may be combined with each other without any
contradiction.
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