Suction nozzle assembly and motor sweeper

Abstract

The suction nozzle assembly comprises a connecting base and a suction nozzle body, the connecting base is used for being connected with a vehicle body, the connecting base and the suction nozzle body are rotatably connected through a connecting rod assembly, the suction nozzle body comprises a frame body, a cleaning cavity matched with the ground in a closed mode is formed in the side, facing the ground, of the frame body, and a suction nozzle is arranged in the cleaning cavity; a partition baffle is arranged in the frame body to divide the sweeping cavity into a first cavity body and a second cavity body in sequence in the advancing direction of the vehicle body; the suction pipe seat is arranged at the top of the cleaning cavity, and the suction pipe seat is communicated with the first cavity and the second cavity through the suction port and performs suction action; the rolling brush assembly is rotationally arranged in the second cavity and used for sweeping a target object on the road surface; the wheel trains are arranged at the four corners of the frame body to make sliding contact with the road surface. The sweeping cavity is divided into the first cavity body and the second cavity body, so that ground garbage is primarily sucked and scraped and sucked by the rolling brush, and the sweeping effect of a road surface under the high-speed running state of a vehicle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning vehicles, in particular to a suction nozzle assembly and a cleaning vehicle. Background Art

[0002] A cleaning vehicle is a commonly used vehicle in the environmental sanitation industry. It plays an important role in municipal environmental sanitation work. Through the suction nozzle in contact with the ground, it gathers and sucks the garbage on the road to keep the road surface clean. The cleaning vehicle can fully clean the road surface by running slowly on urban roads. However, on roads such as highways, national roads and provincial roads, the cleaning area has a large span, and there are often high-speed vehicles passing on the road surface. At this time, if low-speed cleaning is carried out, not only the work efficiency is low, but also the risk of safety accidents will increase due to occupying the driving lane for a long time. However, at present, the suction nozzles of the cleaning vehicles on the market will greatly reduce the cleaning and suction ability of the road surface garbage when the vehicle is running at high speed, and it is difficult to meet the cleaning requirements.

[0003] Therefore, how to enable the cleaning vehicle to meet the cleaning requirements of the road surface in a high-speed running state is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a suction nozzle assembly, so that the cleaning vehicle can meet the cleaning requirements of the road surface in a high-speed running state.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A suction nozzle assembly includes a connecting base and a suction nozzle body. The connecting base is used to connect the vehicle body, and the connecting base and the suction nozzle body are rotatably connected through a connecting rod assembly. The suction nozzle body includes:

[0007] A frame body. One side of the frame body facing the ground includes a cleaning cavity that is hermetically fitted with the ground, and a partition baffle is arranged in the frame body to successively divide the cleaning cavity into a first cavity and a second cavity in the traveling direction of the vehicle body;

[0008] A suction pipe seat is arranged at the top of the cleaning cavity. The suction pipe seat is communicated with the first cavity and the second cavity through a suction port and performs a suction action;

[0009] A rolling brush assembly is rotatably arranged in the second cavity to clean the target objects on the road surface;

[0010] A wheel system is arranged at the four corner positions of the frame body to be in sliding contact with the road surface.

[0011] Preferably, in the above suction nozzle assembly, both sides of the rotary brush assembly are rotatably arranged in the second cavity through bearing seat assemblies, and adjusting grooves are formed on both side walls of the second cavity. The bearing seat assemblies change their vertical height in the adjusting grooves through adjusting lead screws to adjust the height of the rotary brush assembly from the ground.

[0012] Preferably, in the above suction nozzle assembly, it further includes a splash-proof baffle fixed on the connection base and hanging down. The splash-proof baffle is located in front of the suction nozzle body in the vehicle traveling direction.

[0013] Preferably, in the above suction nozzle assembly, a plurality of suction pipe seats are arranged at intervals, and a rubber partition board is fixedly arranged on the top wall of the first cavity to divide the first cavity into suction cavities with the same number as the suction pipe seats. The suction pipe seats and the suction cavities are arranged in one-to-one correspondence.

[0014] Preferably, in the above suction nozzle assembly, the rubber partition board is U-shaped or V-shaped and its opening faces the front side of the vehicle body.

[0015] Preferably, in the above suction nozzle assembly, the suction pipe seat includes a flange bottom plate, a suction steel pipe and an extension part arranged on the flange bottom plate. The extension part is communicated with the suction steel pipe to form the Ω-shaped suction port, and the extension part faces the second cavity.

[0016] Preferably, in the above suction nozzle assembly, the extension part includes a round-to-square plate and a triangular sealing plate. The round-to-square plate is connected to the flange bottom plate through its straight end and is attached to the side wall of the suction steel pipe through its arc-shaped open end. The triangular sealing plate seals the opening area between the round-to-square plate and the suction steel pipe from both sides.

[0017] Preferably, in the above suction nozzle assembly, the partition baffle is made of rubber material, and its first end is rotatably arranged on the top wall of the cleaning cavity through a baffle pin shaft. The second end of the partition baffle hangs down and contacts the road surface, and the partition baffle is inclined towards the second cavity.

[0018] Preferably, in the above suction nozzle assembly, the connecting rod assembly includes at least two connecting rods arranged at intervals. The first end of a single connecting rod is rotatably connected to the connection base through a hinge shaft, and the second end is fixedly connected to the suction nozzle body.

[0019] A road sweeper includes the suction nozzle assembly according to any one of the above embodiments.

[0020] As can be seen from the above technical solutions, the nozzle assembly provided by the present utility model is provided with a first cavity and a second cavity for hierarchical suction, so that the first cavity first contacts the garbage on the road surface, and a negative pressure cavity is formed through the suction action of the suction pipe seat to suck the free garbage on the road surface. For stubborn garbage, a rotary brush assembly is provided at the second cavity downstream of the first cavity to detach the garbage on the road surface through the action of the rotary brush assembly, and then the garbage is sucked up through the suction action of the suction pipe seat to complete the cleaning of the road surface; through the hierarchical action of the first cavity and the second cavity, the floating garbage on the road surface is effectively sucked in the first cavity, and the relatively stubborn adhered garbage is cleaned and detached by the rotary brush assembly in the second cavity and then sucked. The floating garbage will not pass from the first cavity to the second cavity and affect the cleaning effect of the rotary brush assembly, and the stubborn garbage will also be detached and sucked in the second cavity and will not flow out of the nozzle body, so that the vehicle body can meet the cleaning requirements of the road surface under various working conditions while running at a high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Structural schematic diagram of the nozzle assembly provided by the embodiment of the present utility model;

[0023] Figure 2 is Figure 1 an upward view;

[0024] Figure 3 Front cross-sectional structural schematic diagram of the nozzle assembly provided by the embodiment of the present utility model;

[0025] Figure 4 Structural schematic diagram of the suction pipe seat provided by the embodiment of the present utility model;

[0026] Figure 5 is Figure 4 an upward view;

[0027] Figure 6 is Figure 4 Schematic diagram of the pneumatic conveying effect of the suction pipe seat in

[0028] Among them, 10 - connecting base; 20 - nozzle body; 210 - frame body; 2110 - first cavity; 2120 - second cavity; 2130 - adjustment groove; 2140 - rubber partition board; 2150 - partition baffle; 220 - suction pipe seat; 2210 - suction port; 2220 - flange bottom plate; 2230 - suction steel pipe; 2240 - extension part; 2250 - square - round transition plate; 2260 - triangular sealing plate; 230 - roller brush assembly; 240 - gear train; 30 - connecting rod assembly; 310 - connecting rod; 320 - hinge shaft; 40 - bearing seat assembly; 410 - adjustment screw rod; 50 - anti - splash baffle; 60 - leakage partition board. Detailed implementation mode

[0029] The core of the present utility model is to disclose a nozzle assembly and a road sweeper, so that the road sweeper can meet the road cleaning requirements under the condition of high - speed operation.

[0030] In order to enable the personnel in the technical field to better understand the solution of the present utility model, the embodiments of the present utility model will be described below with reference to the accompanying drawings. In addition, the embodiments shown below do not impose any limitation on the content of the utility model recorded in the claims. Moreover, all the contents of the constitution shown in the following embodiments are not necessarily required for the solution of the utility model recorded in the claims.

[0031] As Figure 1 、 Figure 2 and Figure 3 shown, the nozzle assembly provided by the embodiment of the present utility model mainly includes a connecting base 10 and a nozzle body 20. Among them, the connecting base 10 can be set with a flat plate or an open - hole structure, and is fixedly connected to the vehicle body by means of welding, bolt connection, etc., so as to provide a stable support point for the nozzle assembly. At the same time, the nozzle body 20 is connected to the connecting base 10 through a connecting rod assembly 30, so as to allow the nozzle body 20 to be flexibly adjusted according to the road conditions during the cleaning process, and enable it to rotate and press down on the ground to clean the target objects on the ground.

[0032] The nozzle body 20 specifically includes a frame 210, a suction pipe seat 220, a rotary brush assembly 230 and a gear train 240. Specifically, a cleaning cavity is provided on one side of the frame 210 facing the ground to form a nearly closed fit with the ground. Here, specifically, the cleaning cavity is in the configuration of a box body with an opening facing downwards and is buckled on the ground to provide a suction space for road targets, ensuring that the cleaning objects can be effectively collected. At the same time, in order to improve the cleaning efficiency and ensure the cleaning effect, a partition baffle 2150 is provided in the frame 210 to divide the cleaning cavity into two independent cavities, namely, the first cavity 2110 and the second cavity 2120 in the vehicle traveling direction. It should be noted that in the vehicle traveling direction, the first cavity 2110 is located in front of the second cavity 2120, so that the road targets pass through the first cavity 2110 first and then the second cavity 2120 during the vehicle operation.

[0033] On the basis of this structure, the first cavity 2110 and the second cavity 2120 are set with different functions. First, the suction pipe seat 220 is arranged at the top of the cleaning cavity and is connected to both the first cavity 2110 and the second cavity 2120 through the suction ports 2210. It should be noted that an air suction structure is provided in the suction pipe seat 220, and two suction ports 2210 can be provided to be respectively connected to the first cavity 2110 and the second cavity 2120. At the same time, it can also be set as a single one and arranged at the junction of the tops of the first cavity 2110 and the second cavity 2120 to simultaneously suck the spaces in the first cavity 2110 and the second cavity 2120. The setting of the suction pipe seat 220 enables both the first cavity 2110 and the second cavity 2120 to have the conditions of negative pressure cavities to realize the suction of sundries. At the same time, a rotary brush assembly 230 is also provided in the second cavity 2120, and the rotary brush assembly 230 is rotatably arranged to clean the road targets. In the above structure, during the forward movement of the vehicle, the first cavity 2110 will first contact the road garbage, and the first cavity 2110 forms a negative pressure cavity through the suction action of the suction pipe seat 220 to suck the free garbage on the road for road cleaning. For the stubborn garbage adhered to the ground, the first cavity 2110 cannot directly suck it. The second cavity 2120 will then contact the garbage and detach the road garbage through the action of the rotary brush assembly 230, and then suck the garbage through the suction action of the suction pipe seat 220 to complete the cleaning of the road.

[0034] In the above structure, through the hierarchical functions of the first cavity 2110 and the second cavity 2120, the floating garbage on the road surface is effectively sucked in the first cavity 2110, while the relatively stubborn adhered garbage is swept and desorbed by the brush roller assembly 230 in the second cavity 2120 and then sucked. The floating garbage will not pass from the first cavity 2110 to the second cavity 2120 to affect the cleaning effect of the brush roller assembly 230, and the stubborn garbage will also be desorbed and sucked in the second cavity 2120 without flowing out of the suction nozzle body 20. The vehicle body can meet the cleaning requirements of the road surface under high-speed operation and meet the cleaning needs under various working conditions.

[0035] In addition, the gear train 240 is arranged at the four corners of the frame body 210 to contact the road surface, so as to realize the rapid sliding of the suction nozzle body 20, and the gear train 240 is preferably made of wear-resistant materials such as rubber, polyurethane and polyimide.

[0036] Furthermore, considering that different road conditions have different requirements for the cleaning and desorption of the brush roller, and the cleaning ability of the brush roller assembly 230 is positively correlated with the pressing degree between it and the ground. Therefore, in some embodiments of the present invention, the brush roller assembly 230 is set to a structure with adjustable height from the ground to adjust the height according to different road conditions. Specifically, both sides of the brush roller assembly 230 are rotatably arranged in the second cavity 2120 through the bearing seat assembly 40, and adjustment grooves 2130 are opened on both side walls of the second cavity 2120 for installing the bearing seat assembly 40. The bearing seat assembly 40 adjusts its position in the adjustment groove 2130 through the adjustment screw rod 410, and a height change occurs in the vertical direction to adjust the height of the brush roller assembly 230 from the ground.

[0037] It should be noted that the adjustment groove 2130 can be a vertically arranged long hole or an inclined long circular hole structure to provide space for the vertical height adjustment of the bearing seat assembly 40; when it is necessary to use the brush roller assembly 230 for high-intensity cleaning, only need to lower the height of the brush roller assembly 230 so that the pressing force between the brush roller assembly 230 and the ground is stronger to achieve high-intensity cleaning.

[0038] It should be further noted that the adjustment screw rod 410 for adjusting the bearing seat assembly 40 can be manually operated by the operator or can be adjusted directly in the cab through an electric drive method, so that the cleaning personnel can perform real-time adjustment of the brush roller assembly 230 according to the actual conditions of each section of the road surface during a single cleaning process to balance the cleaning effect and energy consumption.

[0039] To further optimize the above technical solution, in some embodiments of the present utility model, the nozzle loyalty further includes a splash-proof baffle 50 to improve the safety and efficiency during the cleaning process. Specifically, the splash-proof baffle 50 is fixedly arranged on the connection base 10 and is arranged in a drooping structure. The splash-proof baffle 50 is located in front of the nozzle body 20 in the vehicle traveling direction to form an effective barrier. During the process of the road garbage being gathered and collected by the sweeper brush, the splash-proof baffle 50 can absorb the kinetic energy of the flying garbage, causing the garbage to fall back to the ground. At the same time, the splash-proof baffle 50 is spaced from the ground so that the gathered garbage does not enter the first cavity 2110 simultaneously, but evenly enters the first cavity 2110 from the gap between the splash-proof baffle 50 and the ground, avoiding the influence of excessive garbage entering at one time on the smooth suction of the first cavity 2110.

[0040] Furthermore, to improve the suction efficiency and cleaning effect, a plurality of suction pipe seats 220 are spaced on the top wall of the first cavity 2110 to match the width of the first cavity 2110 on the vehicle body, ensuring that the suction action can cover the width of the entire cleaning cavity. At the same time, to further improve the suction efficiency, a rubber partition 2140 is fixedly arranged on the top wall of the first cavity 2110 to divide the first cavity 2110 into suction cavities with the same number as the suction pipe seats 220. The design of the rubber partition 2140 not only improves the suction efficiency, but also helps to reduce the noise and vibration during the suction process through the elastic characteristics of the partition. The suction pipe seats 220 are arranged in one-to-one correspondence with the suction cavities, ensuring that the working process of each suction pipe seat 220 is an independent operation, and the smaller cavity structure separated by the rubber partition 2140 also helps to improve the suction effect of the suction pipe seats 220.

[0041] The structure setting of multiple cavities can significantly improve the working efficiency of the suction pipe seats 220, enabling the nozzle assembly to more effectively handle sundries of different sizes and shapes. At the same time, the application of the rubber partition 2140 also improves the stability and comfort of the suction process.

[0042] Based on the above embodiments, the rubber partition 2140 preferably adopts a U-shaped or V-shaped design, and its opening faces the front side of the vehicle body to separate and guide the garbage entering the first cavity 2110, so that the suction pipe seats 220 can perform centralized suction on some areas to improve the cleaning effect.

[0043] Furthermore, as Figure 4 、 Figure 5 and Figure 6As shown in the figure, in the suction nozzle assembly provided by the embodiment of the present utility model, the suction pipe seat 220 specifically includes a flange bottom plate 2220, a suction steel pipe 2230 and an extension part 2240 arranged on the flange bottom plate 2220. Among them, the flange bottom plate 2220 is used for the suction pipe seat 220 to be fixedly arranged on the top of the cleaning cavity. The suction steel pipe 2230 is a common cylindrical structure, and the extension part 2240 is communicated with the suction steel pipe 2230 to expand the area where the suction steel pipe 2230 is communicated with the cleaning cavity, that is, the position of the suction port 2210, so as to form an Ω-shaped suction port 2210. It should be noted that the extension part 2240 faces the second cavity 2120 to improve the suction effect of the suction pipe seat 220 on the area of the second cavity 2120.

[0044] It should be noted that the common suction pipe structures in the prior art are mostly straight cylindrical or frustum-expanded shapes. In the above structures, the straight pipe structure will cause a sudden change in the size of the connection position between the suction pipe and the cleaning area, resulting in eddy currents at the turning points. It is difficult to suck the garbage into the suction pipe, which affects the suction efficiency. The suction pipe can reduce the risk of eddy currents through the frustum structure expansion, but it will reduce the air flow velocity in the suction pipe due to excessive increase in the pipe diameter, which will also affect the suction capacity of the suction pipe. In this embodiment, through the setting of the extension part 2240, the area where the suction steel pipe 2230 is communicated with the cleaning cavity forms an Ω shape, that is, the position of the suction port 2210 in the second cavity 2120 is expanded, so as to reduce the risk of eddy current generation at the position of the suction port 2210 in the second cavity 2120. At the same time, the structure of the end of the suction steel pipe 2230 facing the front side of the vehicle body remains unchanged, so that the cross-sectional area of the suction port 2210 will not be too large to affect the air flow velocity in the suction steel pipe 2230, thereby achieving the balance between eddy current avoidance and air flow velocity and improving the pneumatic conveying efficiency of the suction pipe seat 220.

[0045] On the basis of the above embodiment, the extension part 2240 is specifically composed of a round-top square-bottom plate 2250 and a triangular sealing plate 2260, which not only improves the structural stability of the extension part 2240, but also enhances the sealing performance of the suction port 2210. Specifically, the straight end of the round-top square-bottom plate 2250 is connected to the flange bottom plate 2220, ensuring the firmness of the overall structure; the arc-shaped open end is attached to the side wall of the suction steel pipe 2230, forming a smooth transition, which helps the smooth flow of air; the structure of the triangular sealing plate 2260 seals the opening area between the round-top square-bottom plate 2250 and the suction steel pipe 2230 from both sides, preventing the escape of sundries and air flow and maintaining the sealing performance between the extension part 2240 and the suction steel pipe 2230. The structural optimization of the extension part 2240 significantly improves the overall performance of the suction pipe seat 220, enabling the suction nozzle assembly to work more efficiently and stably during the cleaning process, reducing the risk of eddy currents and maintaining a certain air flow velocity.

[0046] Further, in some embodiments of the present utility model, the partition baffle 2150 is made of rubber material, and one end of the partition baffle 2150 away from the ground is rotatably arranged on the top wall of the cleaning cavity through a baffle pin shaft, so that the partition baffle 2150 not only has good elasticity and wear resistance, but also can realize dynamic adjustment. The hinged setting of one end of the partition baffle 2150 enables its second end to droop and contact the road surface. At the same time, the height of the partition baffle 2150 is set to be greater than the ground height of its hinged end, so that the partition baffle 2150 is inclined, and the inclination direction is towards the second cavity 2120. Correspondingly, the rotation direction of the roller brush assembly 230 is preferably the direction in which the centrifugal force acts towards the inclined partition baffle 2150 and is thrown out. In the above structure, first of all, the partition baffle 2150 can adapt to the unevenness of different road surfaces to separate the first cavity 2110 and the second cavity 2120 under various road conditions, and after a certain amount of wear occurs during operation, the hinged partition baffle 2150 can also compensate itself; secondly, the partition baffle 2150 inclined towards the second cavity 2120 provides a guiding direction for the upward movement of the garbage in the second cavity 2120. After the roller brush assembly 230 desorbs the garbage in the second cavity 2120, it will also provide an initial velocity for the garbage towards the partition baffle 2150, so that the garbage desorbed from the ground can smoothly reach the position of the partition baffle 2150 and move towards the suction port 2210 to be sucked by the suction pipe seat 220.

[0047] In addition, in some embodiments of the present utility model, the link assembly 30 includes at least two connecting rods 310 arranged at intervals. The first end of each connecting rod 310 is rotatably connected to the connection base 10 through a hinge shaft 320, and the second end is fixedly connected to the suction nozzle body 20, so as to allow the suction nozzle body 20 to be adjusted at multiple angles according to the road conditions during the cleaning process; in addition, it should be noted that in order to further improve the flexibility of the link assembly 30, the connecting rods 310 can be connected by means of a spherical joint or a universal joint, etc., so that the suction nozzle body 20 can realize a more complex movement trajectory.

[0048] In order to prevent garbage from leaking from the cleaning cavity, in the embodiments of the present utility model, a leakage partition 60 made of rubber material is provided on one side of the rear end of the second cavity 2120 in the traveling direction of the vehicle body to block and then suck the garbage to improve the cleaning effect.

[0049] The embodiments of the present utility model also provide a cleaning vehicle, which includes the suction nozzle assembly provided in any one of the above embodiments. The cleaning vehicle is designed for cleaning work in urban roads, industrial parks, large squares and other places, and can effectively remove dust, leaves, paper scraps and other sundries on the road surface.

[0050] In the description, claims and above-mentioned drawings of the present utility model, terms such as "first", "second", "left side" and "right side" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units is not limited to the listed steps or units, but may include unlisted steps or units.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nozzle assembly, characterized in that: The invention comprises a connecting base and a nozzle body, wherein the connecting base is used to connect to a vehicle body, and the connecting base and the nozzle body are rotatably connected through a connecting rod assembly, and the nozzle body comprises: A frame, wherein the side of the frame facing the ground includes a cleaning cavity that is sealed and matched with the ground, and a partition baffle is provided in the frame to separate the cleaning cavity into a first cavity and a second cavity in the direction of travel of the vehicle body; A suction pipe seat, arranged at the top of the cleaning chamber, the suction pipe seat is connected with the first cavity and the second cavity through a suction port and performs a suction action; A roller brush assembly is rotatably disposed in the second cavity to clean a target object on the road surface; The gear train is arranged at the four corners of the frame to be in sliding contact with the road surface.

2. The nozzle assembly according to claim 1, characterized in that: The two sides of the roller brush assembly are rotatably arranged in the second cavity through the bearing seat assembly, and the two side walls of the second cavity are provided with adjustment grooves. The bearing seat assembly changes its vertical height in the adjustment groove by adjusting the screw rod, and adjusts the height of the roller brush assembly from the ground.

3. The nozzle assembly according to claim 1, characterized in that: It also includes an anti-splash baffle fixed on the connecting base and arranged downwardly, and the anti-splash baffle is located in front of the suction nozzle body in the traveling direction of the vehicle.

4. The nozzle assembly according to claim 1, characterized in that: A plurality of the suction tube seats are arranged at intervals, and a rubber partition is fixedly arranged on the top wall of the first cavity to divide the first cavity into suction chambers with the same number as the suction tube seats, and the suction tube seats are arranged one by one with the suction chambers.

5. The nozzle assembly according to claim 4, characterized in that: The rubber partition is U-shaped or V-shaped and its opening faces the front side of the vehicle body.

6. The nozzle assembly according to claim 1, characterized in that: The suction pipe seat includes a flange bottom plate, a suction steel pipe and an expansion portion arranged on the flange bottom plate, the expansion portion is communicated with the suction steel pipe to form the Ω-shaped suction port, and the expansion portion is arranged toward the second cavity.

7. The nozzle assembly according to claim 6, characterized in that: The extension part includes a rounded corner plate and a triangular sealing plate. The rounded corner plate is connected to the flange bottom plate through its straight end and fits with the side wall of the suction steel pipe through its arc opening end. The triangular sealing plate blocks the opening area of ​​the rounded corner plate and the suction steel pipe from both sides.

8. The nozzle assembly according to claim 1, characterized in that: The partition baffle is made of rubber material and its first end is rotatably arranged on the top wall of the cleaning cavity through a baffle pin. The second end of the partition baffle hangs down and contacts the road surface, and the partition baffle is inclined toward the second cavity.

9. The nozzle assembly according to claim 1, characterized in that: The connecting rod assembly includes at least two connecting rods arranged at intervals, a first end of a single connecting rod is rotatably connected to the connecting base via a hinge shaft, and a second end is fixedly connected to the nozzle body.

10. A sweeper, characterized in that: The invention comprises a nozzle assembly as described in any one of claims 1 to 9.

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