Double-dust-collection system and high-speed motor sweeper

Abstract

The invention provides a double-dust-collection system and a high-speed sweeping vehicle, and belongs to the technical field of sanitation vehicles. The double-dust-collection system in the high-speed road sweeper comprises a negative-pressure fan mechanism, wherein the negative-pressure fan mechanism is provided with two groups of negative-pressure pipelines; the interior of the garbage collecting box is divided into a first negative pressure collecting area and a second negative pressure collecting area which are independent, and the two sets of negative pressure pipelines communicate with the two negative pressure collecting areas correspondingly; collection pipelines are communicated with the upper parts of the suction nozzle mechanisms, and the two groups of suction nozzle mechanisms are respectively communicated with the two negative pressure collection areas; and through negative pressure provided by the negative pressure fan mechanism, the garbage on the road surface is sucked into the garbage collection box through the suction nozzle mechanism and the collection pipeline. According to the sweeper truck, a new-generation environmental sanitation vehicle is constructed by taking innovatively integrated double dust collection systems as a core and combining a compact internal structure layout and a space utilization scheme. And through precise planning and collaborative design of each part, the function integrity is guaranteed, and meanwhile, the equipment operation efficiency and the space adaptability are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitation vehicles, and in particular to a double dust suction system and a high-speed sweeper. Background Art

[0002] At present, most common garbage sweepers on the market are suction-sweeping structures, relying on negative pressure suction to collect garbage. Unlike traditional road sweepers, they do not need to sweep the garbage to the center of the bottom of the vehicle and then collect it. They can directly suck the garbage on the road into the garbage bin while the vehicle is driving. It has the advantages of high cleaning efficiency and little damage to the road surface, and has gradually become an important equipment for urban sanitation operations.

[0003] However, existing suction-based road waste sweepers still face numerous deficiencies in practical application. For example, the high-speed road sweeper with patent application number 202211703841.X and the dry-type suction-only road sweeper with patent application number 202010832612.2 have exposed significant technical bottlenecks in practical application. In the single-fan and single-chamber configuration, due to the large chamber volume, the power of a single fan is insufficient to meet full-load operation requirements, resulting in insufficient negative pressure suction and difficulty effectively collecting heavy waste. While the dual-fan and single-chamber configuration can improve suction to a certain extent, the negative pressure airflows generated by the two fans are prone to mutual interference during operation. While the negative pressure airflow generated by one fan drives air and waste into the chamber, the negative pressure airflow generated by the other fan disrupts the original flow trajectory, causing the two negative pressure airflows to collide within the chamber, ultimately resulting in suction loss and a "1+1<2" efficiency degradation phenomenon. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present invention provides a dual dust collection system and a high-speed sweeper.

[0005] The technical solution to the technical problem solved by the present invention is: a dual dust suction system is proposed, including a negative pressure fan mechanism, which has two groups of negative pressure pipes; a garbage collection box, the interior of the garbage collection box is divided into an independent first negative pressure collection area and a second negative pressure collection area by a partition, and the two groups of negative pressure pipes are respectively connected to the first negative pressure collection area and the second negative pressure collection area; a suction nozzle mechanism, a collection pipe is connected above the suction nozzle mechanism, and the collection pipes corresponding to the two groups of suction nozzle mechanisms are respectively connected to the first negative pressure collection area and the second negative pressure collection area; and through the negative pressure provided by the negative pressure fan mechanism, the garbage on the road surface is sucked into the garbage collection box through the suction nozzle mechanism and the collection pipe.

[0006] Preferably, the suction nozzle mechanism includes an outer shell, which is provided with at least two sets of running wheels; a roller for rolling the garbage forward is provided inside the outer shell, and no less than two sets of suction nozzle barrels are provided on the front side of the roller, which are connected to the collection pipe.

[0007] Preferably, an upper enclosure and a guide enclosure are provided on the front side of the outer shell. The guide enclosure is arranged in an inclined shape to guide the garbage into the interior of the outer shell and prevent the garbage inside the outer shell from splashing out.

[0008] Preferably, at least two sets of traction chains are provided above the outer shell, the upper ends of the traction chains are connected to basket bolts, the upper ends of the basket bolts are connected to tension springs, and the tension springs are hung on the bottom of the vehicle chassis; at least one set of suspension chains is also provided above the outer shell, and the upper end of the suspension chain is connected to a lifting cylinder for adjusting the distance between the outer shell and the road surface, and the upper end of the lifting cylinder is connected to the bottom of the vehicle chassis.

[0009] Preferably, the negative pressure fan mechanism includes an auxiliary engine, and the auxiliary engine is transmission-connected to two groups of fan bodies, and the suction ends of the two groups of fan bodies are respectively connected to two groups of negative pressure pipes.

[0010] Preferably, the two groups of negative pressure pipes are placed above the garbage collection box and are connected to the garbage collection box, and a filter is provided at the suction end of the negative pressure pipe; and dirt baffles are provided at intervals on the top of the collection pipes.

[0011] The present invention also proposes a road sweeper, comprising a vehicle body, a water tank, a cleaning brush mechanism and any one of the above-mentioned dual dust suction systems, wherein the water tank is placed above the vehicle chassis in the vehicle body, a negative pressure fan mechanism is provided behind the water tank, and a liftable garbage collection box is provided behind the negative pressure fan mechanism; the cleaning brush mechanism is symmetrically arranged at the bottom of the vehicle chassis in the vehicle body, and is symmetrical with the water tank and the garbage collection box, and two spaced-apart suction nozzle mechanisms are provided behind the cleaning brush mechanism.

[0012] Preferably, a sub-frame with a shock-absorbing function is provided above the vehicle chassis, and the negative pressure fan mechanism is connected above the sub-frame.

[0013] Preferably, the rear side of the garbage collection box is hinged to the vehicle chassis, and a front top lifting mechanism is commonly connected between the front side of the garbage collection box and the vehicle chassis. Activating the front top lifting mechanism drives the garbage collection box to tilt and discharge the internal garbage.

[0014] Preferably, dust shields are provided between the two cleaning brush mechanisms and on the front sides of the two cleaning brush mechanisms.

[0015] Compared with the existing technology, the above technical solution has the following advantages or beneficial effects: 1. The dual vacuum system proposed in this invention divides the garbage collection box into independent first and second negative pressure collection areas, each of which is connected to a corresponding negative pressure pipe. This allows negative pressure suction to act on the corresponding negative pressure collection area, and through the interaction between the corresponding suction nozzle mechanism and the collection pipe, the garbage is sucked into the corresponding negative pressure collection area. This design creates two independent working areas within the two negative pressure collection areas, without gas exchange between the two areas, making the airflow distribution more reasonable. Only the corresponding negative pressure collection areas are connected, and a closed loop is formed by the independent suction nozzle mechanism and the collection pipe, so that the two systems do not interfere with each other, avoiding the loss of negative pressure suction.

[0016] 2. The proposed road sweeper breaks away from traditional design concepts in its overall design. With an innovative, integrated dual-dust collection system at its core, it combines a highly compact internal structure with optimized space utilization, creating a new generation of efficient sanitation equipment. Through the meticulous planning and coordinated design of each component, the system significantly improves operational efficiency and spatial adaptability while ensuring functional integrity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the top of the high-speed sweeper of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the bottom side of the high-speed road sweeper of the present invention.

[0020] Figure 3 It is a front view of the high-speed sweeper of the present invention.

[0021] Figure 4 It is a schematic diagram of the internal structure of the vehicle body with a garbage collection box above it in the present invention.

[0022] Figure 5 It is the airflow direction diagram of the double dust collection system in the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure between the vehicle head and the garbage collection box in the present invention.

[0024] Figure 7 Schematic diagram of the internal structure of the two suction nozzle mechanisms and the garbage collection box in the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the bottom side of the two suction nozzle mechanisms in the present invention.

[0026] Figure 9It is a schematic diagram of the three-dimensional structure of the top of the two suction nozzle mechanisms in the present invention.

[0027] Description of the marks in the figure: 1. Vehicle body; 2. Vehicle chassis; 3. Negative pressure fan mechanism; 31. Auxiliary engine; 32. Fan body; 33. Negative pressure pipe; 4. Garbage collection box; 41. First negative pressure collection area; 42. Second negative pressure collection area; 43. Interceptor cover; 5. Suction nozzle mechanism; 51. Outer shell; 52. Travel wheel; 53. Roller; 54. Suction nozzle; 55. Collection pipe; 56. Drag chain; 57. Turnbuckle; 58. Tension spring; 59. Suspension chain; 510. Lifting cylinder; 511. Upper enclosure; 512. Guide enclosure; 6. Water tank; 7. Cleaning brush mechanism; 8. Spare water tank; 9. Subframe; 10. Front top lifting mechanism; 11. Dust shield. DETAILED DESCRIPTION

[0028] In order to make the purposes, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0030] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0032] like Figures 1 to 6 As shown, this embodiment proposes a dual dust collection system, which includes a negative pressure fan mechanism 3, which has two groups of negative pressure pipes 33 for delivering stable negative pressure suction; it also includes a garbage collection box 4, the interior of which is divided into an independent first negative pressure collection area 41 and a second negative pressure collection area 42 by a partition, and the second negative pressure area is located to the upper right of the first negative pressure area, so that the first negative pressure area forms an "L"-shaped space, and the tail of the garbage collection box 4 is provided with a box door that can be flexibly controlled to open and close, so as to facilitate regular cleaning of garbage accumulated in the two negative pressure collection areas. The above-mentioned two groups of negative pressure pipes 33 are respectively connected to the first negative pressure collection area 41 and the second negative pressure collection area 42; it also includes a suction nozzle structure, and a collection pipe 55 is connected above the suction nozzle mechanism 5, and the corresponding collection pipes 55 in the two groups of suction nozzle mechanisms 5 are respectively connected to the first negative pressure collection area 41 and the second negative pressure collection area 42; and through the negative pressure provided by the negative pressure fan mechanism 3, the garbage on the road surface is sucked into the garbage box through the suction nozzle mechanism 5 and the collection pipe 55.

[0033] Research and development has revealed that most road sweepers currently on the market utilize a single negative pressure system with a single-chassis design to achieve negative pressure suction and collection. For example, the high-speed road sweeper with patent application number 202211703841.X and the dry-type pure suction road sweeper with patent application number 202010832612.2 exhibit significant technical bottlenecks in practical application. In the single-fan and single-chassis configuration, due to the large chamber volume, the power of the single fan is insufficient to meet full-load operation requirements, resulting in insufficient negative pressure suction and difficulty effectively collecting heavier waste. While the dual-fan and single-chassis configuration improves suction to a certain extent, the negative pressure airflows generated by the two fans easily interfere with each other during operation. While the negative pressure airflow from one fan drives air and waste into the chamber, the negative pressure airflow from the other fan disrupts the original flow trajectory, causing the two negative pressure airflows to collide within the chamber, ultimately resulting in a loss of suction power and a "1+1<2" efficiency degradation phenomenon.

[0034] like Figure 5 As shown, the dual dust collection system proposed in the present invention divides the garbage collection box into an independent first negative pressure collection area 41 and a second negative pressure collection area 42, which are respectively connected to the corresponding negative pressure pipes 33. When the negative pressure fan mechanism 3 is started, the negative pressure formed in the negative pressure pipe 33 acts on the corresponding negative pressure collection area, and through the mutual cooperation of the corresponding suction nozzle mechanism 5 and the collection pipe 55, the garbage is sucked into the corresponding negative pressure collection area.

[0035] This design allows two independent working areas to be formed in the two negative pressure collection areas. There is no gas exchange between the two areas, making the airflow distribution more reasonable. Only the corresponding negative pressure collection areas are connected, and a closed loop is formed by the independent suction nozzle mechanism 5 and the collection pipe 55, so that the two systems do not interfere with each other, avoiding the loss of negative pressure suction.

[0036] On the other hand, this dual-vacuum system offers both increased negative pressure suction and high stability. If a negative pressure collection area fails due to garbage blockage, component damage, or other issues, the physically isolated areas, each independently connected to the negative pressure pipe 33 and the suction nozzle mechanism 5, allow the other area to maintain a stable negative pressure through independent operation, ensuring continued efficient suction by the corresponding suction nozzle mechanism 5 and avoiding system downtime. This design allows the faulty area to be repaired separately without affecting the normal operation of the other unit, significantly improving system reliability and maintenance efficiency.

[0037] In some embodiments, the suction nozzle mechanism 5 includes an outer shell 51, and at least two sets of running wheels 52 are provided on the outer shell 51. Preferably, in order to achieve the stability of the suction nozzle mechanism 5, a total of four sets of running wheels 52 are provided, and the four sets of running wheels 52 are distributed on the front and rear sides of the outer shell 51 and are arranged in a rectangular shape; the running wheels 52 are constructed so that the relative distance from the bottom of the outer shell 51 can be adjusted. By adjusting the height of the running wheels 52, the distance between the bottom surface of the outer shell 51 and the road surface can be accurately controlled to ensure that the negative pressure suction force reaches the optimal state, thereby improving the garbage suction efficiency.

[0038] Further, such as Figures 8 and 9 As shown, a roller 53 for pushing the garbage forward is further provided inside the outer shell 51. The roller 53 is driven by a hydraulic motor fixed on the outer shell 51. At least two groups of suction nozzles 54 are provided on the front side of the roller 53. The suction nozzles 54 are connected to the collection pipe 55. Each suction nozzle 54 is connected to the collection pipe 55 through a flexible pipe (corrugated pipe, metal hose and rubber hose, etc.) to meet the height adjustment requirements of the suction nozzle mechanism 5.

[0039] The surface of the roller 53 is provided with auxiliary lifting patterns. When it is driven to rotate by a hydraulic motor, it can flip the block-shaped garbage with a certain weight on the road surface (such as stones, bottle caps, etc.) upwards, so that it is freed from the road surface adsorption state; under the auxiliary lifting effect of the roller 53, the garbage obtains an initial upward velocity and enters the interior of the suction nozzle 54 under the action of negative pressure, which can significantly improve the suction and collection efficiency of heavy garbage.

[0040] In some embodiments, an upper enclosure 511 and a guide enclosure 512 are provided on the front side of the outer shell 51. The upper enclosure 511 is located in the upper half of the outer shell 51, and the guide enclosure 512 is tilted to guide garbage into the interior of the outer shell 51 to prevent it from splashing out. The tilted guide enclosure 512 allows the garbage to naturally slide along the guide enclosure 512 into the interior of the outer shell 51 as the suction nozzle mechanism 5 moves on the road. It is then sucked up by negative pressure, thereby improving the efficiency of garbage entering the suction nozzle mechanism 5 and making the cleaning process smoother. The design of the upper enclosure 511 protects the chassis 2 to a certain extent, preventing garbage from collapsing upward during suction by the suction nozzle mechanism 5 and causing damage to the chassis 2.

[0041] On the other hand, the outer shell 51 and the guide enclosure 512 cooperate to form a relatively closed space, thereby preventing the problem of garbage splashing out due to the pullout of the roller 53 or other reasons, ensuring the cleanliness of the cleaning area and avoiding secondary contamination. Preferably, the upper enclosure 511 and the guide enclosure 512 are made of rubber. This material is better adapted to the current scenario and can better adapt to the different flatness and slope of the road surface, so that it always maintains good contact with the road surface, ensuring that the garbage guidance and blocking effect is not affected by the road surface conditions.

[0042] In some embodiments, at least two sets of traction chains 56 are arranged above the outer shell 51, and the upper ends of the traction chains 56 are connected to basket bolts 57, and the upper ends of the basket bolts 57 are connected to tension springs 58. The tension springs 58 are hung on the bottom of the vehicle chassis 2 to form auxiliary limiting and support for the suction nozzle mechanism 5; at least one set of suspension chains 59 is arranged above the outer shell 51, and the upper end of the suspension chain 59 is connected to a lifting cylinder 510 for adjusting the distance between the outer shell 51 and the ground, and the upper end of the lifting cylinder 510 is connected to the bottom of the vehicle chassis 2.

[0043] Preferably, Figure 9 As shown, there are four corresponding groups of traction chains 56, basket bolts 57, and tension springs 58, which are distributed in a rectangular shape above the outer shell 51. This component can provide elastic limiting when the nozzle mechanism 5 is working. When the nozzle mechanism 5 is displaced by road bumps, the tension spring 58 absorbs the vibration energy through its own deformation, achieving flexible support and positioning of the nozzle mechanism 5, preventing it from being displaced from the working position due to violent shaking. There are two groups of suspension chains 59 and lifting cylinders 510, which are symmetrically distributed on both sides above the outer shell 51. When the nozzle mechanism 5 is in the non-working state, the lifting cylinder 510 contracts and drives the nozzle mechanism 5 to be lifted as a whole to the bottom of the vehicle chassis 2, effectively avoiding friction loss with the road surface during travel. When entering the working state, the lifting cylinder 510 extends and releases the nozzle mechanism 5, allowing it to fall naturally under its own weight until the running wheel 52 is in close contact with the road surface. This design can accurately control the lifting distance of the nozzle mechanism 5, ensuring that the nozzle mechanism 5 maintains the optimal working distance from the road surface.

[0044] The flexible connection design of the traction chain 56, suspension chain 59, and tension spring 58 enables the suction nozzle mechanism 5 to adapt to complex road conditions. The flexible structure allows the suction nozzle mechanism 5 to move appropriately on roads of varying flatness and slope, avoiding the risk of excessive stress and damage to connected components caused by rigid connections. It also ensures that the suction nozzle mechanism 5 maintains a good contact with the road surface, improving suction efficiency and device durability.

[0045] In some embodiments, the negative pressure fan mechanism 3 includes an auxiliary engine 31, which is connected to two sets of fan bodies 32 in a transmission manner. The suction ends of the two sets of fan bodies 32 are respectively connected to two sets of negative pressure pipes 33. Specifically, the fan body 32 includes components such as a volute, an impeller, and a rotating shaft. The volute has a spiral structure and forms an internal channel for guiding airflow. The impeller is disposed within the volute and is connected to the power output end of the auxiliary engine 31 via a rotating shaft. The two rotating shafts in the two fan bodies 32 are connected to a clutch assembly to achieve transmission between the two. This design allows the operating status of the two fan bodies 32 to be flexibly controlled according to needs, ensuring the coordinated and efficient operation of the dual dust collection system when needed.

[0046] In some embodiments, the negative pressure pipes 33 are placed above the garbage collection box 4 and are respectively connected to the first negative pressure collection area 41 and the second negative pressure collection area 42. A filter is provided at the suction end of the negative pressure pipe 33; a intercepting cover 43 is provided at the top interval of the collection pipe 55 to intercept the garbage sucked into the garbage collection box 4 and sink it to the bottom of the garbage box.

[0047] The suction end of the negative pressure pipe 33 is arranged above the garbage collection box 4, which can shorten the airflow path and reduce the airflow resistance to a certain extent, making the negative pressure transmission more efficient and stable. The filter screen arranged at the suction end of the negative pressure pipe 33 can effectively prevent larger particles of impurities such as paper scraps from entering the fan. The intercepting cover 43 is arranged at intervals on the top of the collection pipe 55. The intercepting cover 43 is prism-shaped and cooperates with the negative pressure fan mechanism 3. When the high-speed negative pressure airflow carries garbage into the collection pipe 55, the intercepting cover 43 can change the direction of the airflow and slow down the airflow speed. At this time, the garbage is separated from the airflow under the action of gravity and sinks and accumulates in the corresponding area of the garbage collection box 4, thereby largely avoiding the garbage being sucked into the negative pressure pipe 33 by the negative pressure airflow, or the garbage carried by the high negative pressure airflow directly colliding with the garbage collection box 4, causing damage to the interior of the garbage collection box 4.

[0048] In the present invention, a road sweeper is also proposed, such as Figures 1 to 6As shown, the road sweeper includes a vehicle body 1, a water tank 6, a cleaning brush mechanism 7 and any one of the dust collection systems in Example 1, wherein the water tank 6 is placed above the vehicle chassis 2 in the vehicle body 1, and a negative pressure fan mechanism 3 is provided behind the water tank 6, and a liftable garbage collection box 4 is provided behind the negative pressure fan mechanism 3; the cleaning brush mechanism 7 is symmetrically arranged at the bottom of the vehicle chassis 2 in the vehicle body 1, and is connected to the water tank 6 through a water pump, and a suction pipe is provided above the cleaning brush mechanism, and the suction pipe is connected to the garbage collection box 4, making full use of the negative pressure in the garbage collection box 4 to absorb dust and small particles of garbage into the garbage collection box, and two spaced-apart suction nozzle mechanisms 5 are provided behind the cleaning brush mechanism 7.

[0049] This road sweeper is equipped with a dual dust collection system, achieving more efficient dust collection than traditional models. Combined with a water tank 6 and a sweeping brush mechanism 7, it gathers garbage at the center of the chassis 2, allowing the dual dust collection system's suction nozzle mechanism 5 to collect it. The sweeping brush, connected to the water tank 6, can also spray water mist, effectively suppressing dust generated during the sweeping and collection process, reducing air pollution.

[0050] Furthermore, the cleaning brush mechanism 7 adopts a foldable structure and can be deployed to both sides of the vehicle chassis 2. When operating on narrow roads, the sweeping brushes can be folded and stowed to avoid collision with obstacles. During normal cleaning operations, the two cleaning brush mechanisms 7 can be deployed to both sides to expand the cleaning range, ensuring that garbage on the edge of the road is also swept and gathered towards the center of the vehicle body 1. Since the specific folding structure of the cleaning brush mechanism 7 is prior art, it will not be described in detail here.

[0051] In some embodiments, dust shields 11 are provided between the two cleaning brush mechanisms 7 and in front of the two cleaning brush mechanisms 7. During cleaning operations, the cleaning brush mechanisms 7 on both sides operate synchronously to clean the middle portion of the garbage bin vehicle body 1 on the road surface. At this time, the dust shield 11 located on the front side can block the garbage falling forward and guide it to the middle area of the vehicle body 1. The dust shield 11 located in the middle can, on the one hand, physically separate the operating areas of the two sets of cleaning brush mechanisms 7, preventing the cleaning brushes on one side from accidentally sweeping garbage to the other side, thus avoiding repeated cleaning. On the other hand, it can gather the garbage in the middle position, so that it is concentrated within the operating range of the suction nozzle mechanism 5. As the road sweeper moves forward, the accumulated garbage is efficiently sucked into the garbage collection box 4 through the suction nozzle mechanism 5 and the collection pipe 55 under the suction force generated by the negative pressure fan mechanism 3.

[0052] During the design of the road sweeper, a shock-absorbing subframe 9 was installed above the chassis 2 to meet its vibration reduction requirements. Specifically, several shock-absorbing assemblies were installed between the subframe 9 and the chassis 2. These shock-absorbing assemblies can utilize a damping spring structure, but since this is conventional technology, we will not elaborate on them in detail. The auxiliary engine 31 and two sets of fans in the negative pressure fan mechanism 3 are all installed above the subframe 9.

[0053] Furthermore, in order to make full use of the space above the road sweeper, a spare water tank 8 is connected above the sub-frame 9, and the spare water tank 8 is arranged on one side of the fan.

[0054] In some embodiments, the rear side of the garbage collection box 4 is hinged to the vehicle chassis 2, and a front top lifting mechanism 10 is commonly connected between the front side of the garbage collection box 4 and the vehicle chassis 2. When the front top lifting mechanism 10 is activated, the garbage box can be tilted with the hinge point as the center, and the internal garbage can be discharged from the rear.

[0055] In the front suction nozzle mechanism 5, the top of the outer shell 51 is provided with an escape groove corresponding to the drive shaft of the vehicle body 1. This groove adopts a stepped, sunken structure. Two sets of suction nozzle cylinders 54 are located inside the outer shell 51, symmetrically distributed on both sides of the escape groove. At the same time, an escape opening is opened in the middle of the roller 53. When the suction nozzle mechanism 5 is raised to the extreme position by the lifting cylinder 510, the escape groove is located directly below the drive shaft, so that the drive shaft is located in the escape groove space. The escape groove and the drive shaft are perfectly aligned in the horizontal position. Through this three-dimensional escape design, the risk of interference between the suction nozzle mechanism 5 and the drive shaft during the ascent is completely eliminated.

[0056] The rear suction nozzle mechanism 5 utilizes a smooth, uninterrupted cylindrical structure, coupled with three equally spaced sets of suction nozzles 54 to form a stable negative pressure suction array. To ensure dynamic balance between the negative pressure suction forces of the two suction nozzle mechanisms 5, the inner diameter of the dual suction nozzles 54 in the front suction nozzle mechanism 5 is set to 240mm, while the inner diameter of the triple suction nozzles 54 in the rear suction nozzle mechanism 5 is set to 200mm. Under the same negative pressure blower power, the negative pressure suction forces of the front and rear suction nozzle mechanisms 5 remain essentially consistent, ensuring balanced dust collection across wide road surfaces.

[0057] The proposed road sweeper breaks through traditional design concepts in its overall design. With an innovative, integrated dual-dust collection system at its core, it combines a highly compact internal structure with optimized space utilization, creating a new generation of efficient sanitation equipment. Through the meticulous planning and coordinated design of each component, the system significantly improves operational efficiency and spatial adaptability while ensuring functional integrity.

[0058] In summary, the road sweeper of this invention achieves comprehensive improvements in cleaning performance, equipment stability, and spatial adaptability through the innovative application of a dual dust collection system, a compact and rational internal structure, and a design that maximizes space utilization. Compared to traditional road sweepers, this not only effectively solves problems such as insufficient negative pressure suction and wasted space, but also, through the organic integration of various components, forms a new sanitation equipment with significant technical advantages, providing a more efficient and flexible solution for urban road cleaning operations.

[0059] Although the above describes the specific implementation methods of the invention in conjunction with the accompanying drawings, it does not limit the scope of protection of the invention. Based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. A dual dust collection system, characterized in that: include: A negative pressure fan mechanism (3), wherein the negative pressure fan mechanism (3) has two sets of negative pressure pipes (33); A garbage collection box (4), wherein the interior of the garbage collection box (4) is divided into an independent first negative pressure collection area (41) and a second negative pressure collection area (42) by a partition, and the two groups of negative pressure pipes (33) are respectively connected to the first negative pressure collection area (41) and the second negative pressure collection area (42); A suction nozzle mechanism (5) is provided, and a collection pipe (55) is connected above the suction nozzle mechanism (5). The collection pipes (55) corresponding to the two sets of suction nozzle mechanisms (5) are respectively connected to the first negative pressure collection area (41) and the second negative pressure collection area (42); and through the negative pressure provided by the negative pressure fan mechanism (3), garbage on the road surface is sucked into the garbage collection box (4) through the suction nozzle mechanism (5) and the collection pipe (55).

2. A dual dust collection system according to claim 1, characterized in that: The suction nozzle mechanism (5) comprises an outer shell (51) provided with at least two sets of running wheels (52); a roller (53) for rolling the garbage forward is provided inside the outer shell (51), and at least two sets of suction nozzle barrels (54) are provided on the front side of the roller (53), and the suction nozzle barrels (54) are connected to the collection pipe (55).

3. A dual dust collection system according to claim 2, characterized in that: An upper enclosure (511) and a guide enclosure (512) are provided on the front side of the outer shell (51); the guide enclosure (512) is arranged in an inclined shape to guide the garbage into the interior of the outer shell (51) and prevent the garbage inside the outer shell (51) from splashing out.

4. A dual dust collection system according to claim 2, characterized in that: At least two sets of traction chains (56) are provided above the outer shell (51), the upper ends of the traction chains (56) are connected to flower basket bolts (57), the upper ends of the flower basket bolts (57) are connected to tension springs (58), and the tension springs (58) are hung on the bottom of the vehicle chassis (2); at least one set of suspension chains (59) is also provided above the outer shell (51), and the upper ends of the suspension chains (59) are connected to lifting cylinders (510) for adjusting the distance between the outer shell (51) and the road surface, and the upper ends of the lifting cylinders (510) are connected to the bottom of the vehicle chassis (2).

5. A dual dust collection system according to claim 1, characterized in that: The negative pressure fan mechanism (3) comprises an auxiliary engine (31), the auxiliary engine (31) being transmission-connected to two sets of fan bodies (32), and the suction ends of the two sets of fan bodies (32) being respectively connected to two sets of negative pressure pipes (33).

6. A dual dust collection system according to claim 1, characterized in that: The two groups of negative pressure pipes (33) are both placed above the garbage collection box (4) and are connected to the garbage collection box (4). A filter is provided at the suction end of the negative pressure pipe (33); and a dirt baffle is provided at intervals on the top of the collection pipe (55).

7. A road sweeper, characterized in that: It comprises a vehicle body (1), a water tank (6), a cleaning brush mechanism (7) and a dual dust collection system as claimed in any one of claims 1 to 6, The water tank (6) is placed above the chassis (2) in the vehicle body (1), a negative pressure fan mechanism (3) is provided behind the water tank (6), and a liftable garbage collection box (4) is provided behind the negative pressure fan mechanism (3); the cleaning brush mechanism (7) is symmetrically provided at the bottom of the chassis (2) in the vehicle body (1), and is connected to the water tank (6) and the garbage collection box (4), and two spaced-apart suction nozzle mechanisms (5) are provided behind the cleaning brush mechanism (7).

8. The road sweeper according to claim 7, characterized in that: A sub-frame (9) with a shock-absorbing function is provided above the vehicle chassis (2), and the negative pressure fan mechanism (3) is connected above the sub-frame (9).

9. The road sweeper according to claim 7, characterized in that: The rear side of the garbage collection box (4) is hinged to the vehicle chassis (2), and a front lifting mechanism (10) is commonly connected between the front side of the garbage collection box (4) and the vehicle chassis (2). When the front lifting mechanism (10) is activated, the garbage collection box (4) is tilted to discharge the garbage inside.

10. The road sweeper according to claim 7, characterized in that: A dust shield (11) is provided between the two cleaning brush mechanisms (7) and on the front sides of the two cleaning brush mechanisms (7).

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