Water tank liquid level monitoring structure of unmanned sweeper

Abstract

The water tank liquid level monitoring structure comprises a first outer shell, a fixing sleeve, a sliding sleeve, an elastic piece, a connecting piece, a counterweight assembly and a sensor assembly, the fixing sleeve is connected in the first outer shell, the sliding sleeve is inserted in the fixing sleeve in a sliding mode, a cavity is formed among the sliding sleeve, the fixing sleeve and the first outer shell, the elastic piece is arranged in the cavity, and the counterweight assembly is arranged in the cavity. The elastic piece applies upward movement elastic force to the sliding sleeve, the connecting piece is connected with the sliding sleeve, the counterweight assembly is connected with the connecting piece and arranged in the first shell, and the sensor assembly is connected in the first shell and located on the outer side of the cavity. Liquid in the water tank is prevented from entering the area of the sensor assembly through the cavity formed by the fixed sleeve and the sliding sleeve, the stability of the working environment of the sensor assembly is ensured, the sensor assembly detects the two positions of the sliding sleeve, and therefore the low liquid level state and the high liquid level state in the water tank are detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to unmanned cleaning vehicle technical field, especially unmanned cleaning vehicle's water tank liquid level monitoring structure. BACKGROUND

[0002] Unmanned cleaning vehicle is the intelligent environmental sanitation equipment that integrates environmental perception, path planning and cleaning operation function. Its technical system takes multi-sensor fusion as the core, constructs the environment model through laser radar, camera and millimeter wave radar sensing unit, realizes autonomous movement in combination with high-precision positioning and navigation algorithm, and is equipped with brush, roller brush and dust collection system to complete efficient cleaning operation. The vehicle adopts modular design, supports task mode switching and remote monitoring, and is suitable for cleaning needs of urban streets, parks, squares and industrial parks and other scenes.

[0003] The existing unmanned cleaning vehicle also integrates water tank and watering system. In the working process of unmanned cleaning vehicle, the clean water in the water tank is sprayed on the ground through the watering system, which can prevent dust problem in the cleaning process. Some unmanned cleaning vehicles also have sewage tank and water suction system, which can suck the sewage on the ground back to the sewage tank through the water suction system to realize further cleaning of the ground. The water level monitoring in the clean water tank or sewage tank is necessary to ensure the above working process. Therefore, it is necessary to design a liquid level monitoring device. SUMMARY

[0004] The water tank liquid level monitoring structure of the unmanned cleaning vehicle provided by the embodiment of the application is used to solve the technical problem of how to monitor the liquid level in the water tank.

[0005] The water tank liquid level monitoring structure of the unmanned cleaning vehicle provided by the embodiment of the application comprises:

[0006] The first shell is connected with the water tank.

[0007] The fixing sleeve is connected in the first shell.

[0008] The sliding sleeve is vertically slidably inserted in the fixing sleeve, and a cavity is formed between the sliding sleeve, the fixing sleeve and the first shell.

[0009] The elastic member is arranged in the cavity, and the elastic member applies an upward elastic force to the sliding sleeve.

[0010] The connecting piece is connected with the sliding sleeve.

[0011] The counterweight assembly is connected with the connecting piece and arranged in the first shell.

[0012] A sensor assembly is connected to the first shell and located outside the cavity. When the liquid level is lower than the counterweight assembly, the sensor assembly detects the first position of the sliding sleeve. When the liquid level is higher than the counterweight assembly, the sensor assembly detects the second position of the sliding sleeve.

[0013] The above embodiment has the beneficial effect that the cavity formed by the fixed sleeve and the sliding sleeve avoids the liquid in the water tank from entering the area of the sensor assembly, ensuring the stability of the working environment of the sensor assembly. The two positions of the sliding sleeve are detected by the sensor assembly, so as to detect the low liquid level and high liquid level states in the water tank.

[0014] On the basis of the above embodiment, the embodiments of the present application can also be improved as follows:

[0015] In one of the embodiments of the present application, a limiting block is further connected to the sliding sleeve, and the limiting block is arranged in the limiting groove of the fixed sleeve. The beneficial effect of this step is that the limiting block is configured to prevent the sliding sleeve from being pulled out of the fixed sleeve.

[0016] In one of the embodiments of the present application, a low liquid level contact block and a high liquid level contact block are further connected to the sliding sleeve. The low liquid level contact block is used to cooperate with the sensor assembly to detect the low liquid level state, and the high liquid level contact block is used to cooperate with the sensor assembly to detect the high liquid level state. The beneficial effect of this step is that the low liquid level contact block and the high liquid level contact block are configured to facilitate the detection of the liquid level by the sensor assembly.

[0017] In one of the embodiments of the present application, the counterweight assembly comprises a first counterweight block and a second counterweight block. The first counterweight block and the second counterweight block are both connected to the connecting piece, and the first counterweight block is located below the second counterweight block. The beneficial effect of this step is that the first counterweight block can straighten the connecting piece, and the second counterweight block facilitates the control of the density of the entire counterweight assembly.

[0018] In one of the embodiments of the present application, a sealing assembly is further connected to the lower end of the first shell, and the connecting piece passes through the sealing assembly. The beneficial effect of this step is that the sealing assembly improves the waterproof effect of the overall structure.

[0019] In one of the embodiments of the present application, the sealing assembly comprises a second shell and a sealing piece. The second shell is connected to the first shell, the sealing piece is arranged in the second shell, and the connecting piece passes through the sealing piece.

[0020] In one of the embodiments of the present application, the sealing assembly further comprises a partition plate connected to the second shell, an upper end of the partition plate forms a positioning groove, and a lower end of the partition plate forms a water drainage groove, and the sealing member is arranged in the positioning groove. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0022] Figure 1 It is a structural schematic view of the water tank liquid level monitoring structure of the unmanned cleaning vehicle.

[0023] Figure 2 It is Figure 1 It is a local enlarged view of A.

[0024] In the drawings, 1 is a first shell, 2 is a fixing sleeve, 3 is a sliding sleeve, 4 is an elastic member, 5 is a connecting member, 6 is a counterweight assembly, 601 is a first counterweight block, 602 is a second counterweight block, 7 is a sensor assembly, 701 is a low liquid level sensor, 702 is a high liquid level sensor, 8 is a limiting block, 9 is a gland, 10 is a low liquid level contact block, 11 is a high liquid level contact block, 12 is a sealing assembly, 1201 is a second shell, 1202 is a sealing member, and 1203 is a partition plate. DETAILED DESCRIPTION

[0025] In the present application, unless otherwise explicitly specified and limited, the terms in the present application should be understood in a broad sense. For example, the connection can be a fixed connection, or can be a detachable connection or an integral part, and can be directly connected or indirectly connected through an intermediate medium. If it involves power, electronic equipment, it can also be an electrical connection or a communication signal connection, etc. For ordinary skilled persons in the art, different terms in the present application can be understood according to the specific circumstances, and the specific meaning should be limited to the function of the present application.

[0026] In the description of the present application, it should be understood that the orientation terms or position relationship descriptions are based on the orientation or position relationship shown in the drawings, or based on the orientation or position relationship in actual use, which is only for the convenience of describing the content of the present application and simplifying the description, and is not intended to indicate or imply that the devices or elements indicated must have a specific orientation, structure and operation, therefore it cannot be understood as a limitation of the present application.

[0027] Embodiment one

[0028] The water tank liquid level monitoring structure of the unmanned cleaning vehicle comprises a first shell 1, a fixing sleeve 2, a sliding sleeve 3, an elastic element 4, a connecting element 5, a counterweight assembly 6, and a sensor assembly 7. The first shell 1 is connected with the water tank. The fixing sleeve 2 is connected in the first shell 1. The sliding sleeve 3 is vertically and slidingly inserted in the fixing sleeve 2. A cavity is formed between the sliding sleeve 3, the fixing sleeve 2 and the first shell 1. The elastic element 4 is arranged in the cavity. The elastic element 4 applies an upward elastic force to the sliding sleeve 3. The connecting element 5 is connected with the sliding sleeve 3. The counterweight assembly 6 is connected with the connecting element 5 and arranged in the first shell 1. The sensor assembly 7 is connected in the first shell 1 and located outside the cavity. When the liquid level is lower than the counterweight assembly 6, the sensor assembly 7 detects the first position of the sliding sleeve 3. When the liquid level is higher than the counterweight assembly 6, the sensor assembly 7 detects the second position of the sliding sleeve 3.

[0029] Specifically, the first shell 1 comprises a shell and a bottom plate. The shell and the bottom plate are connected by bolts. The fixing sleeve 2 is connected to the bottom plate. The fixing sleeve 2 is vertically provided with a hole. The sliding sleeve 3 is slidingly inserted in the hole. The lower end of the sliding sleeve 3 is provided with a groove along the axis. The surface of the bottom plate in the hole is connected with a positioning boss. The elastic element 4 is a compression spring (cylindrical compression spring). The upper end of the compression spring is inserted in the groove. The lower end of the compression spring is sleeved on the positioning boss, so as to stably position the compression spring between the sliding sleeve 3 and the fixing sleeve 2.

[0030] Specifically, the water tank liquid level monitoring structure further comprises a limiting block 8. The limiting block 8 is connected to the sliding sleeve 3 and arranged in the limiting groove of the fixing sleeve 2. By configuring the limiting block 8, the sliding sleeve 3 is prevented from being pulled out of the fixing sleeve 2.

[0031] Specifically, the limiting block 8 is connected to the outer side of the sliding sleeve 3. The fixing sleeve 2 is vertically provided with a limiting groove in communication with the hole. The upper end of the fixing sleeve 2 is connected with a gland 9. The limiting block 8 is limited in the limiting groove by the gland 9, so as to prevent the sliding sleeve 3 from being pulled out of the fixing sleeve 2.

[0032] Specifically, the water tank liquid level monitoring structure further comprises a low liquid level contact block 10 and a high liquid level contact block 11. The low liquid level contact block 10 and the high liquid level contact block 11 are connected to the sliding sleeve 3. The low liquid level contact block 10 is used for detecting the low liquid level state in cooperation with the sensor assembly 7. The high liquid level contact block 11 is used for detecting the high liquid level state in cooperation with the sensor assembly 7. By configuring the low liquid level contact block 10 and the high liquid level contact block 11, the sensor assembly 7 is facilitated to detect the liquid level.

[0033] Specifically, the upper end of the sliding sleeve 3 is connected with a plate. The plate extends out of the outer side of the sliding sleeve 3. The low liquid level sensor 701 is connected to the lower end of the plate. The high liquid level contact block 11 is connected to the upper end of the plate. By configuring the plate, the positions of the low liquid level contact block 10 and the high liquid level contact block 11 are facilitated to be arranged.

[0034] Specifically, the counterweight assembly 6 comprises a first counterweight 601 and a second counterweight 602, both of which are connected with the connecting piece 5, the first counterweight 601 is located below the second counterweight 602, the first counterweight 601 can straighten the connecting piece 5, and the second counterweight 602 facilitates control of the density of the whole counterweight assembly 6.

[0035] Specifically, the connecting piece 5 adopts a pull rope, in addition to which, the connecting piece 5 can also adopt a steel wire, a clinker rod, and other products with a connecting function. Taking the pull rope as an example, the pull rope comprises an upper section rope body and a lower section rope body, the upper end of the upper section rope body is connected with a pull ring in the sliding sleeve 3, the lower end is connected with a pull ring at the upper end of the first counterweight 601, the upper end of the lower section rope body is connected with a pull ring at the lower end of the first counterweight 601, and the lower end is connected with a pull ring at the upper end of the second counterweight 602, so as to achieve the function of suspending the first counterweight 601 and the second counterweight 602 at the lower end of the sliding sleeve 3 through the pull rope.

[0036] Specifically, the density of the first counterweight 601 is greater than the density of the liquid, and the density of the second counterweight 602 is less than the density of the liquid, the first counterweight 601 adopts a solid ball, and the second counterweight 602 adopts a hollow ball, when the second counterweight 602 is completely immersed in the liquid, the elastic member 4 can push the sliding sleeve 3 to move upward, and the high liquid level contact block 11 is detected by the sensor assembly 7.

[0037] Specifically, the sensor assembly 7 comprises a low liquid level sensor 701 and a high liquid level sensor 702, the low liquid level sensor 701 and the high liquid level sensor 702 can adopt micro switches, photoelectric sensors, proximity switches, etc., the low liquid level sensor 701 and the high liquid level sensor 702 are electrically connected with the control system of the unmanned sweeper, the low liquid level contact block 10 is located directly above the contact or sensing end of the low liquid level sensor 701, and the high liquid level contact block 11 is located directly below the contact or sensing end of the high liquid level sensor 702.

[0038] The working principle of the water tank liquid level monitoring structure is as follows: when the liquid level in the water tank is lower than the first counterweight 601, the counterweight assembly 6 drives the sliding sleeve 3 to compress the elastic member 4, so that the low liquid level contact block 10 moves downward and is detected by the low liquid level sensor 701, at this time, the control system of the unmanned sweeper obtains a low liquid level signal, and the control system is set to a low liquid level state; when the liquid level is between the first counterweight 601 and the second counterweight 602, the sensor assembly 7 cannot detect the low liquid level contact block 10 and the high liquid level contact block 11, at this time, the control system has no signal input, and the control system is set to a normal liquid level state; when the liquid level is above the second counterweight 602, the sensor assembly 7 detects the high liquid level contact block 11, at this time, the control system obtains a high liquid level signal, and the control system is set to a high liquid level state.

[0039] When determining the above states, the low liquid level signal, the high liquid level signal or the no liquid level signal state needs to be maintained for n seconds, such as 60 seconds, 180 seconds, etc., which should be set according to the situation. The reason for such setting is that the sweeper may run on uneven road surface, resulting in that the control system sometimes receives signals and sometimes does not receive signals in a short time. Therefore, a period of time is set as a redundancy value to avoid false alarms of the control system.

[0040] For example, for the clean water tank of the unmanned sweeper, the control system generates control information that the clean water needs to be supplemented in the low liquid level state, and generates control information that the clean water needs to be stopped in the high liquid level state. For example, for the sewage tank of the unmanned sweeper, the control system generates control information that the sewage needs to be discharged in the high liquid level state.

[0041] Embodiment Two

[0042] On the basis of the first embodiment, the water tank liquid level monitoring structure further comprises a sealing assembly 12 connected to the lower end of the first shell 1, and the connecting piece 5 passes through the sealing assembly 12.

[0043] Specifically, the sealing assembly 12 comprises a second shell 1201 connected to the first shell 1 and a sealing piece 1202 arranged in the second shell 1201, and the connecting piece 5 passes through the sealing piece 1202.

[0044] Specifically, the sealing assembly 12 further comprises a partition plate 1203 connected to the second shell 1201, the upper end of the partition plate 1203 forms a positioning groove, and the lower end forms a water discharge groove, and the sealing piece 1202 is arranged in the positioning groove.

[0045] Specifically, the second shell 1201 is connected to the bottom plate by bolts, the lower end of the second shell 1201 is a small end downward inverted conical structure, so as to facilitate the discharge of liquid in the water discharge groove, and the sealing piece 1202 can be made of sponge, rubber block, foam and the like, and a through hole is provided in the sealing piece 1202 for the connecting piece 5 to pass through.

[0046] The purpose of providing the sealing assembly 12 is to make the first barrier through the sealing assembly 12 to reduce the probability of liquid entering the cavity, thereby further improving the sealing effect of the water tank liquid level monitoring structure.

[0047] The above is only an embodiment of the present application, and the common knowledge of specific structures and properties in the scheme is not described in detail, the ordinary skilled person in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply conventional experimental means before that date, the ordinary skilled person in the art can improve and implement the present scheme under the inspiration given in the present application, and some typical known structures or known methods should not be an obstacle for the ordinary skilled person in the art to implement the present application. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application.

Claims

1. A water tank level monitoring structure of an unmanned sweeper, characterized by comprising: a water tank; a water level sensor; a water level display; a water level alarm; a water level control unit; and a water level control switch. The utility model relates to a water tank liquid level sensor, comprising: a first shell connected with a water tank; a fixed sleeve connected in the first shell; a sliding sleeve vertically slidingly inserted into the fixed sleeve, a cavity being formed among the sliding sleeve, the fixed sleeve and the first shell; a resilient member arranged in the cavity, the resilient member applying an elastic force to the sliding sleeve for upward movement; a connecting member connected with the sliding sleeve; a counterweight assembly connected with the connecting member and arranged in the first shell; a sensor assembly connected in the first shell and located outside the cavity, the sensor assembly detecting a first position of the sliding sleeve when the liquid level is lower than the counterweight assembly, and detecting a second position of the sliding sleeve when the liquid level is higher than the counterweight assembly.

2. The water tank level monitoring structure according to claim 1, characterized by Further comprising: a limiting block connected with the sliding sleeve, the limiting block being arranged in a limiting groove of the fixed sleeve.

3. The water tank level monitoring structure according to claim 1, characterized by, Further comprising: a low liquid level contact block and a high liquid level contact block, the low liquid level contact block and the high liquid level contact block being connected with the sliding sleeve, the low liquid level contact block being used for cooperating with the sensor assembly to detect a low liquid level state, and the high liquid level contact block being used for cooperating with the sensor assembly to detect a high liquid level state.

4. The water tank level monitoring structure according to claim 1, characterized by, The counterweight assembly comprises a first counterweight block and a second counterweight block, both of which are connected with the connecting member, and the first counterweight block is located below the second counterweight block.

5. The water tank level monitoring structure according to claim 1, characterized by, Further comprising: a sealing assembly connected with a lower end of the first shell, and the connecting member penetrating through the sealing assembly.

6. The water tank level monitoring arrangement of claim 5, wherein, The sealing assembly comprises a second shell connected with the first shell and a sealing member arranged in the second shell, and the connecting member penetrating through the sealing member.

7. A water tank level monitoring arrangement according to claim 6, characterised in that, The sealing assembly further comprises a partition plate connected in the second shell, an upper end of the partition plate forming a positioning groove and a lower end of the partition plate forming a water discharge groove, and the sealing member being arranged in the positioning groove.

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