Pure electric road sweeping vehicle having dual-fan structure

Abstract

The present application relates to the technical field of special-purpose vehicles, and discloses a pure electric road sweeping vehicle having a dual-fan structure, comprising a frame, a garbage bin and sweeping devices, and further comprising a first fan and a second fan which are used for generating a negative pressure in a bin body of the garbage bin, and a driving motor used for directly driving the first fan and the second fan. The first fan and the second fan are respectively directly driven by and connected to two ends of a rotating shaft of the driving motor, the first fan and the second fan are communicated with an inner cavity of the garbage bin by means of a first duct and a second duct, a suction structure used for suctioning garbage into the bin body of the garbage bin is connected to the bottom of the garbage bin, and the suction structure is arranged close to the sweeping devices. The present application effectively improves motor rotation stability and vehicle energy efficiency.

Description

A pure electric sweeper with a dual-fan structure Technical Field

[0001] This application relates to the field of special vehicle technology, specifically to a pure electric sweeper with a dual-fan structure. Background Technology

[0002] Pure electric sweeper trucks are road cleaning vehicles manufactured and modified based on pure electric Class II chassis. Currently, pure electric sweeper trucks have two layouts for their sweeping devices: one with two disc brushes and one suction nozzle mounted in the middle of the chassis, and the other with four disc brushes mounted in the middle of the chassis and one suction nozzle mounted at the rear. Both layouts use a single-fan suction method, meaning a permanent magnet synchronous motor directly drives or pulleys drive the fan. The negative pressure and kinetic energy generated by the fan's operation sucks road debris and wastewater into the garbage bin through a single suction nozzle. This single-fan sweeper truck performs relatively well in areas with moderate road pollution. However, due to the limited power of the single fan and the relatively fast speed of the suction nozzle, the sweeping effect is poor in heavily polluted areas, easily resulting in missed areas of debris. To remove residual debris, the vehicle needs to return and sweep the road again, thus extending working time and reducing work efficiency.

[0003] To address the aforementioned technical problems, Chinese invention patent CN115821832A discloses a sweeper truck with a dual-fan system, comprising: a vehicle chassis, a housing, a first fan, a second fan, a first motor, a second motor, a disc brush, a first suction cup, and a second suction cup; the housing includes a front cover, a clean water tank, a large garbage compartment, a small garbage compartment, and a rear door; the clean water tank includes a front water tank, a bottom water tank, a left water tank, and a right water tank; the first fan, the second fan, the first motor, and the second motor are located within the front cover, with the first motor driving the first fan and the second motor driving the second fan. The sweeper truck with the dual-fan system provided by this invention improves sweeping efficiency on heavily polluted roads and reduces power loss and water consumption on moderately polluted roads, extending working time.

[0004] However, the above structure uses one motor to drive one fan. When the fan is running, the huge rotational inertia of the fan affects the stability of the drive motor's rotating shaft, which puts high demands on the load-bearing capacity of the drive motor's rotating shaft and the supporting components and seals. In addition, the fan and the drive motor are connected by a belt, which reduces the transmission efficiency and thus reduces the vehicle's energy efficiency. Application content

[0005] The purpose of this application is to provide a pure electric sweeper with a dual-fan structure that effectively improves the rotational stability of the motor and the energy efficiency of the vehicle.

[0006] This application is implemented as follows:

[0007] A pure electric sweeper with a dual-fan structure includes a frame, a garbage bin, and sweeping equipment. It also includes a first fan and a second fan for generating negative pressure inside the garbage bin, and a drive motor for directly driving the first fan and the second fan. The first fan and the second fan are respectively directly connected to the two ends of the rotating shaft of the drive motor. The first fan and the second fan are respectively connected to the inner cavity of the garbage bin through a first pipe and a second pipe. The bottom of the garbage bin is connected to a suction structure for sucking garbage into the garbage bin. The suction structure is located close to the sweeping equipment.

[0008] Furthermore, the suction structure includes a suction duct for sucking in garbage, and the suction duct is provided with an atomizing nozzle for dust suppression.

[0009] Furthermore, a baffle is provided at the outlet end of the inhalation duct, and the baffle is positioned near the first and second pipes.

[0010] Furthermore, the baffle is C-shaped, and the concave side of the baffle faces the outlet end of the inhalation channel.

[0011] Furthermore, a filter screen is provided between the first pipe and the second pipe and the suction structure, and the filter screen is connected to the trash can.

[0012] Furthermore, the drive motor, the first fan, and the second fan are all placed inside a soundproof partition built into one end of the garbage bin.

[0013] Furthermore, the first fan and the second fan are respectively connected to a first exhaust duct and a second exhaust duct for exhausting air.

[0014] Furthermore, the first and second exhaust ducts are respectively equipped with noise reduction devices.

[0015] Furthermore, the cleaning device is a brush.

[0016] Furthermore, the trash can is located on the upper part of the rear side of the vehicle frame, and the cleaning device is located on the bottom of the front side of the vehicle frame.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] 1. A fan is directly connected to each end of the rotating shaft of the drive motor. The fans act as loads at the front and rear ends of the rotating shaft, which makes the load on both ends of the rotating shaft basically balanced, greatly improving the stability of rotation and reducing the load requirements of the rotating shaft on the support and sealing components.

[0019] 2. The negative pressure structure of the dual fans can significantly reduce the volume of the negative pressure structure, optimize the spatial layout, reduce the air duct resistance, and improve the vehicle's operating efficiency.

[0020] 3. The built-in negative pressure structure inside the garbage bin significantly reduces the noise of the fan and provides a guarantee for further noise reduction. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 is a top view of the internal structure of this application;

[0023] Figure 2 is a side view of the internal structure of this application.

[0024] Reference numerals: 1. Frame; 2. Garbage bin; 3. Sweeping equipment; 4. First fan; 5. Second fan; 6. Drive motor; 7. First duct; 8. Second duct; 9. Suction duct; 10. Atomizing nozzle; 11. Baffle; 12. Filter screen; 13. Silencing partition; 14. First exhaust duct; 15. Second exhaust duct; 16. Silencing device. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0026] Please refer to Figures 1 and 2. A pure electric sweeper with a dual-fan structure includes a frame 1, a garbage bin 2, and a sweeping device 3. It also includes a first fan 4 and a second fan 5 for generating negative pressure inside the garbage bin 2, and a drive motor 6 for directly driving the first fan 4 and the second fan 5. The first fan 4 and the second fan 5 are respectively directly connected to the two ends of the rotating shaft of the drive motor 6. The first fan 4 and the second fan 5 are respectively connected to the inner cavity of the garbage bin 2 through a first pipe 7 and a second pipe 8. The bottom of the garbage bin 2 is connected to a suction structure for sucking garbage into the garbage bin 2. The suction structure is located close to the sweeping device 3.

[0027] The suction structure includes a suction duct 9 for sucking in garbage, and an atomizing nozzle 10 for dust suppression is provided on the suction duct 9.

[0028] A baffle 11 is provided at the outlet end of the inhalation duct 9, and the baffle 11 is located on the side close to the first pipe 7 and the second pipe 8.

[0029] The baffle 11 is C-shaped, and the concave side of the baffle 11 is disposed facing the outlet end of the suction channel 9.

[0030] A filter screen 12 is provided between the first pipe 7 and the second pipe 8 and the suction structure, and the filter screen 12 is connected to the trash can 2.

[0031] The drive motor 6, the first fan 4, and the second fan 5 are all placed inside the soundproof partition 13 built into one end of the garbage bin 2.

[0032] The first fan 4 and the second fan 5 are respectively connected to a first exhaust duct 14 and a second exhaust duct 15 for exhausting air.

[0033] The first exhaust duct 14 and the second exhaust duct 15 are respectively equipped with a noise reduction device 16.

[0034] The cleaning device 3 is a brush.

[0035] The trash can 2 is located on the upper part of the rear side of the vehicle frame 1, and the cleaning device 3 is located on the bottom of the front side of the vehicle frame 1.

[0036] The working principle of this application is as follows: The rotating shaft of the drive motor 6 directly drives the first fan 4 and the second fan 5 at both ends. Air is drawn out from the inner cavity of the garbage bin 2 through the first pipe 7 and the second pipe 8, creating negative pressure inside the garbage bin 2. Under this negative pressure, the road debris swept by the sweeping equipment 3 enters the garbage bin 2 through the suction duct 9. During the process of the debris entering the garbage bin 2, water mist sprayed from the atomizing nozzle 10, which is connected to a water source through a pipeline, condenses the small particles in the debris and attaches them to the larger debris particles, achieving initial dust suppression. When the large debris particles pass through the outlet end of the suction duct 9, they are guided by the "C"-shaped baffle 11 and thrown away from the first pipe 7 and the second pipe 8. Due to inertia and gravity, the large debris particles are then dispersed. By placing the trash can 2 away from the negative pressure end, the amount of light debris flying around is effectively reduced. The air and a small amount of light debris are directed towards the air inlet of the two fans, where they are blocked by the coarse filter screen 12. The air then enters the relatively independent first exhaust duct 14 and second exhaust duct 15 and is discharged into the atmosphere. The negative pressure structure, including the drive motor 6, the first fan 4, and the second fan 5, is placed inside the soundproof partition 13 at one end of the trash can 2, which greatly reduces the noise generated by the negative pressure structure. The soundproofing devices 16 installed at the ends of the first exhaust duct 14 and the second exhaust duct 15 further reduce the wind noise of this application. The cleaning device 3 is a brush. The trash can 2 is located on the upper rear side of the vehicle frame 1, and the cleaning device 3 is located on the bottom front side of the vehicle frame 1.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dual-fan structure pure electric road sweeper vehicle, comprising: The frame (1), the garbage can (2), the cleaning equipment (3), characterized in that: further comprising a first fan (4) and a second fan (5) for generating negative pressure in the box of the garbage can (2), and a driving motor (6) for directly driving the first fan (4) and the second fan (5), the first fan (4) and the second fan (5) are respectively directly connected at both ends of the rotating shaft of the driving motor (6), the first fan (4) and the second fan (5) are respectively connected with the inner cavity of the garbage can (2) through the first pipeline (7) and the second pipeline (8), the bottom of the garbage can (2) is connected with a suction structure for sucking garbage into the inner cavity of the garbage can (2), and the suction structure is arranged close to the cleaning equipment (3).

2. The dual-fan structure pure electric road sweeper according to claim 1, characterized in that, The suction structure includes a suction channel (9) for sucking garbage, and an atomizing nozzle (10) for dust reduction is arranged on the suction channel (9).

3. The dual-fan structure pure electric road sweeper according to claim 2, characterized in that, The outlet end of the suction channel (9) is provided with a baffle (11), and the baffle (11) is arranged close to one side of the first pipeline (7) and the second pipeline (8).

4. The dual-fan structure pure electric road sweeper according to claim 3, characterized in that, The baffle (11) is "C" shaped, and the concave side of the baffle (11) is arranged towards the outlet end of the suction channel (9).

5. The dual-fan structure pure electric road sweeper truck of claim 1, wherein, A filter screen (12) is arranged between the first pipeline (7) and the second pipeline (8) and the suction structure, and the filter screen (12) is connected with the garbage can (2).

6. The dual-fan structure pure electric road sweeper truck according to claim 1, characterized in that, The driving motor (6), the first fan (4) and the second fan (5) are all arranged in a sound insulation partition (13) arranged in one end of the garbage can (2).

7. The dual-fan structure pure electric road sweeper truck according to claim 1, characterized in that, The first fan (4) and the second fan (5) are respectively connected with a first exhaust channel (14) and a second exhaust channel (15) for exhaust.

8. The dual-fan structure pure electric road sweeper according to claim 7, characterized in that, The first exhaust channel (14) and the second exhaust channel (15) are respectively provided with a sound reduction device (16) for noise reduction.

9. The dual-fan structure pure electric road sweeper truck of claim 1, wherein, The garbage can (2) is arranged on the upper part of the rear side of the frame (1), and the cleaning equipment (3) is arranged on the bottom of the front side of the frame (1).

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