A kind of fallen leaf cleaning operation vehicle of coaxial suction crushing and top-mounted compression coordination

Abstract

The present application relates to the technical field of sanitation cleaning equipment, and specifically discloses a leaf cleaning vehicle with coaxial suction and crushing and overhead compression cooperation. The vehicle comprises a vehicle body chassis, a cleaning mechanism, a coaxial suction and crushing assembly, a collection box, an overhead compression assembly, a hydrogen power unit and a cooling mechanism. The cleaning mechanism guides the fallen leaves to the collection mechanism. The blades in the coaxial suction and crushing assembly are coaxially arranged with the centrifugal fan impeller and are driven by the same drive shaft, so that the fallen leaves are shredded during the negative pressure suction process. The crushed fallen leaves enter the collection box and are compressed by the compaction plate driven by the hydraulic cylinder arranged on the top plate. The hydrogen power unit is used to provide walking and working power for the vehicle, and cooperates with the tail gas purification and circulating cooling system to realize low-noise and low-emission operation. The vehicle has a compact structure and is suitable for fallen leaf cleaning operation in scenes with dense people flow and road congestion.

Description

Technical Field

[0001] This invention relates to the field of environmental sanitation equipment technology, specifically to a leaf sweeping vehicle that combines coaxial suction crushing and top-mounted compression. Background Technology

[0002] With the continuous expansion of urban green areas and the increasing requirements for environmental protection operations, the sweeping, collection, and transportation of fallen leaves in autumn and winter have become important aspects of sanitation work. Although existing leaf sweeping equipment can accomplish the task of sweeping and collecting fallen leaves to a certain extent, it still has shortcomings in terms of structural integration, operational continuity, compression efficiency, and adaptability to new energy power sources. These shortcomings are mainly reflected in the following aspects.

[0003] 1. In existing leaf-collecting equipment, common designs often separate the functions of sweeping, suction, crushing, and collection, with each function performed independently by different components or power units. While this structure can achieve basic leaf handling, the connections between these functional modules are relatively dispersed. Materials need to travel a long conveying path to complete the process from suction to crushing and collection, resulting in a relatively complex overall structure, a large footprint, and potential for power transmission losses and material blockages. For vehicles requiring continuous operation in narrow roads and densely populated areas, this decentralized structure is not conducive to miniaturization and efficient deployment of the entire vehicle.

[0004] 2. While some existing equipment includes a compression function, the compression mechanism is typically separate from the collection box or occupies a portion of the collection box's internal volume, resulting in low overall space utilization. This is especially true when compressed directly with leaves that haven't been fully crushed, as the gaps between the leaves are large, the compression ratio is limited, and the transport and loading efficiency is low, making it difficult to fully utilize the compression mechanism's capabilities. Furthermore, the separate compression structure increases the difficulty of equipment layout and maintenance, hindering the formation of a continuous and efficient operational process.

[0005] 3. With the development of clean energy technologies, hydrogen power systems are gradually being applied to sanitation vehicles. However, existing hydrogen-powered sanitation vehicles often employ relatively conventional starting methods and pipeline layouts in terms of cooling control, lacking targeted optimization of the cooling medium circulation path. System response and thermal management effectiveness still have room for improvement. Regarding hydrogen safety, exhaust gas treatment methods are mostly focused on basic protection, and the design for continuous safe treatment of residual gases in the exhaust and suppression of backfire risks is still insufficient. For sanitation vehicles requiring long-term, low-speed, and continuous operation, the thermal stability and safety redundancy of the power system are particularly important.

[0006] 4. In existing technologies, the functions of leaf sweeping, collection, crushing, compression, and new energy power supply, cooling, and safe handling are mostly presented as independent modules. While these modules can each perform their respective functions, they have not yet formed an integrated solution that coordinates and optimizes the entire vehicle's operational process. Especially for sanitation vehicles that require compact layout, continuous operation, low noise, low emissions, and high efficiency, a technical solution that organically combines the leaf handling process with a new energy power system is still needed to improve the overall vehicle's operational efficiency and application adaptability.

[0007] In summary, existing leaf sweeping equipment still has certain limitations in terms of functional integration, space utilization, compression efficiency, and adaptability to new energy power sources. Therefore, it is necessary to design a leaf sweeping vehicle with a more compact structure, a more streamlined operation process, and the ability to adapt to hydrogen-powered platforms. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a leaf sweeping vehicle that combines coaxial suction crushing and top-mounted compression.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: A leaf sweeping vehicle with coaxial suction crushing and top-mounted compression combined includes a chassis, a sweeping mechanism, a collection mechanism, and a compression mechanism. The sweeping mechanism is used to guide the fallen leaves to the collection mechanism.

[0010] The collection mechanism includes a feed inlet, a suction pipe, a coaxial suction and pulverizing assembly, and a leaf collection box; the feed inlet is connected to the suction pipe and is located upstream of the coaxial suction and pulverizing assembly.

[0011] The coaxial suction pulverizing assembly includes a centrifugal fan impeller, a blade assembly, and a drive shaft. The blade assembly is coaxially fixed on the same drive shaft as the centrifugal fan impeller, and the blade assembly is located upstream of the material flow of the centrifugal fan impeller so that the fallen leaves are shredded before entering the centrifugal fan impeller. The drive shaft is used to connect to a drive device.

[0012] The compression mechanism includes a top-mounted compression assembly disposed on the top of the leaf collection box. The top-mounted compression assembly includes a hydraulic cylinder and a compaction plate. The cylinder body of the hydraulic cylinder is fixed to the outside of the top plate of the leaf collection box. The compaction plate is disposed inside the leaf collection box and connected to the piston rod of the hydraulic cylinder, so as to reciprocate vertically inside the leaf collection box to compact the fallen leaves.

[0013] Furthermore, the blade assembly includes multiple blades, blade one, blade two, blade three, and blade four, arranged sequentially along the axial direction of the drive shaft. Blade one, blade two, blade three, and blade four are rigidly fixedly connected to the drive shaft via a flange hub.

[0014] Furthermore, buffer pads are provided between adjacent blades, between the blade assembly and the centrifugal fan impeller, and between the blade assembly and the top cover.

[0015] Furthermore, the buffer pad includes a first buffer pad disposed between the blade assembly and the top cover, and a second buffer pad disposed between adjacent blades.

[0016] Furthermore, the hydraulic cylinder is located outside the leaf collection box, and the compaction plate is located inside the leaf collection box, with the compression space and the leaf collection space being shared.

[0017] Furthermore, the top-mounted compression assembly also includes a hydraulic pump, a solenoid directional valve, an air cooler, a return oil filter, and an oil tank; the return oil port of the solenoid directional valve is connected to the oil tank after passing through the air cooler and the return oil filter in sequence, and the oil tank is connected to the suction port of the hydraulic pump to form a hydraulic circulation loop.

[0018] Furthermore, it also includes a hydrogen power unit, which comprises a hydrogen storage tank, a primary pressure reducing valve, a booster pump, a secondary pressure reducing valve, and a hydrogen fuel cell.

[0019] Furthermore, the exhaust outlet of the hydrogen fuel cell is sequentially connected to a one-way valve, a flame arrester, and a hydrogen exhaust purifier, forming a three-stage safety treatment structure for the exhaust gas.

[0020] Furthermore, it also includes a cooling mechanism, which includes a water pump, a water tank, a radiator, a first fan, and a second fan; the water pump, hydrogen fuel cell, water tank, and radiator are connected in sequence through cooling pipes to form a circulating cooling loop.

[0021] The beneficial effects achieved by this invention are as follows: 1. This invention coaxially integrates the suction and crushing functions, allowing fallen leaves to be shredded as they enter the negative pressure conveying channel. This reduces the repeated transfer paths of materials within the equipment, lowering the risk of blockage and energy consumption. Compared to the traditional approach where the suction and crushing devices are separate, this invention makes the cleaning, suction, crushing, and collection processes more seamless, improving the efficiency of fallen leaf processing and facilitating a more compact overall structure. 2. This invention places the compression mechanism at the top of the collection box and causes the compaction plate to reciprocate vertically inside the collection box, thereby completing the leaf compaction process within a limited space. This structure can achieve the compression function without significantly occupying the collection volume, which is beneficial for increasing the leaf loading density, reducing the frequency of collection, and improving the continuous operation capability of the entire vehicle. Since the compression and collection actions are completed in the same space, it can also simplify the overall layout and reduce structural complexity; 3. This invention uses hydrogen power as the vehicle's power source, and employs a cooling system to circulate and cool the power unit, which helps meet the energy demands of long-term continuous operation while improving thermal management stability. Compared to traditional fuel-powered solutions, hydrogen-powered solutions are more suitable for low-noise, low-emission urban sanitation scenarios and are more in line with the development trend of green operations. 4. This invention further enhances the safety of hydrogen power system exhaust gases by employing unidirectional flow restriction, backfire prevention, and exhaust gas purification to reduce safety risks during residual gas emissions and improve the applicability of hydrogen power systems in sanitation vehicle scenarios. This design helps enhance system operational safety and improves the reliability of the entire vehicle under complex operating conditions. 5. This invention integrates sweeping, suction, crushing, collection, compression, hydrogen power supply, cooling, and safe handling functions into a single integrated system, enabling vehicles to complete the continuous operation process of sweeping fallen leaves from the ground to compaction and transportation on a single platform. Compared to existing equipment with dispersed functions, this invention has better spatial integration and operational coordination, and can adapt to application scenarios such as dense crowds, narrow roads, and continuous operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the exploded structure of the cleaning mechanism in this invention.

[0024] Figure 3 This is a schematic diagram of the coaxial suction and pulverizing component in this invention.

[0025] Figure 4 This is a schematic diagram of the assembly of the blade and the centrifugal fan impeller in this invention.

[0026] Figure 5 This is a schematic diagram of the top-mounted compression component structure in this invention.

[0027] Figure 6 This is a schematic diagram of the connection between the piston and the compaction plate in this invention.

[0028] Figure 7 This is a schematic diagram of the hydraulic system connection in this invention.

[0029] Figure 8 This is a schematic diagram of the overall layout of the hydrogen power unit in this invention.

[0030] Figure 9 This is a schematic diagram of the internal structure of the hydrogen supply pump in this invention.

[0031] Figure 10 This is a schematic diagram of the one-way valve structure in this invention.

[0032] Figure 11 This is a schematic diagram of the hydrogen-electricity synergistic cooling system in this invention.

[0033] Figure 12 This is a schematic diagram of the heat sink and fan assembly in this invention.

[0034] Figure 13 This is a schematic diagram of the water pump installation structure in this invention.

[0035] Figure 14 This is a schematic diagram of the front wheel steering mechanism in this invention.

[0036] Figure 15 This is a schematic diagram of the rear-wheel drive mechanism in this invention.

[0037] Figure 16 This is a schematic diagram of the internal structure of the three-stage reducer in this invention.

[0038] Figure 17 This is a schematic diagram of the differential gear transmission mechanism in this invention.

[0039] In the diagram: 1-Car body shell; 2-Electric motor one; 3-Screw one; 4-Screw two; 5-Disc brush one; 6-Electric motor two; 7-Screw three; 8-Screw four; 9-Disc brush two; 10-Electric motor three; 11-Screw five; 12-Screw six; 13-Disc brush three; 14-Vertical roller brush one; 15-Motor one; 16-Screw nine; 17-Screw ten; 18-Vertical roller brush two; 19-Disc brush four; 20-Electric motor four; 21-Screw seven; 22-Screw eight; 23-Motor two; 24-Screw eleven; 25-Screw twelve; 26-Slide hopper pad; 27-Slide hopper; 28-Screw forty-two; 29-Screw forty-three; 30-Screw forty-four; 31-Screw forty-five; 32 - Pipe gasket 2; 33- Pipe 2; 34- Screw 38; 35- Screw 39; 36- Screw 40; 37- Screw 41; 38- Screw 34; 39- Screw 35; 40- Screw 36; 41- Screw 37; 42- Pipe gasket 1; 43- Centrifugal fan outer cover; 44- Collector outer cover gasket 1; 45- Collector outer cover; 46- Collector outer cover gasket 2; 47- Pipe 1; 48- Inlet gasket; 49- Screw 13; 50- Screw 14; 51- Screw 15; 52- Screw 16; 53- Screw 17; 54- Screw 18; 55- Screw 19; 56- Screw 20; 57- Screw 21; 58- Screw 22; 59- Screw 23; 60- Screw 24; 61-Feed inlet; 62-Motor output shaft; 63-Key 1; 64-Large pulley; 65-Multi-ribbed belt; 66-Small pulley; 67-Positioning shoulder; 68-Bearing housing 1; 69-Deep groove ball bearing 1; 70-Motor 3; 71-Screw 46; 72-Screw 47; 73-Screw 48; 74-Screw 49; 75-Shaft; 76-Key 2; 77-Bearing housing 2; 78-Deep groove ball bearing 2; 79-Shaft protection end cover; 80-End cover gasket; 81-Screw 30; 82-Screw 31; 83-Screw 32; 84-Screw 33; 85-Top cover 1; 86-Screw 25; 87-Screw 26; 88-Screw 27; 89-Top cover gasket; 90-Top cover 2; 91-Blade 1. Blade 2; 92. Blade 3; 94. Blade 4; 95. Turbine Blade; 96. Screw 28; 97. Screw 29; 98. Blade Washer 1; 99. Blade Washer 2; 100. Blade Washer 3; 101. Blade Washer 4; 102. Blade Washer 5; 103. Rodless Chamber End Cap; 104. Screw 81; 105. Screw 82; 106. Screw 83; 107. Screw 84; 108. Screw 85; 109. Screw 86; 110. Oil Pipe 4; 111. Bracket; 112. Hydraulic Cylinder; 113. Screw 75; 114. Screw 76; 115. Screw 77; 116. Screw 78; 117. Screw 79; 118. Screw 80;119-Oil pipe five; 120-Leaf collection box; 121-Hydraulic pump; 122-Screw 57; 123-Screw 58; 124-Screw 59; 125-Screw 60; 126-Oil pipe two; 127-Oil tank; 128-Oil pipe three; 129-Solenoid directional valve; 130-Screw 61; 131-Screw 62; 132-Screw 63; 133-Screw 64; 134-Hydraulic motor; 135-Screw 51; 136-Screw 52; 137-Screw 53; 138-Screw 54; 139-Screw 55; 140-Screw 56; 141-Air cooler; 142-Screw 71; 143-Screw 72; 144-Screw 73; 14 5-Screw 74; 146-Oil pipe 1; 147-Return oil filter; 148-Screw 65; 149-Screw 66; 150-Screw 67; 151-Screw 68; 152-Screw 69; 153-Screw 70; 154-Car chassis; 155-Nut 1; 156-Guide ring 1; 157-Piston; 158-Guide ring 2; 159-Piston seal; 160-Piston rod; 161-Compactor plate; 162-Hydraulic motor output shaft; 163-Cross slider coupling bushing 1; 164-Key 4; 165-Center slider; 166-Cross slider coupling bushing 2; 167-Key 5; 168-Hydraulic pump input shaft; 169-Clamping support 1; 170-Screw 80 6; 171-Screw washer 1; 172-Nut 2; 173-Screw 87; 174-Screw washer 2; 175-Nut 3; 176-Hydrogen storage tank; 177-Clamping support 2; 178-Screw 88; 179-Screw washer 3; 180-Nut 4; 181-Screw 89; 182-Screw washer 4; 183-Nut 5; 184-Overflow valve; 185-Hydrogen delivery pipe 1; 186-First-stage pressure reducing valve; 187-Hydrogen delivery pipe 2; 188-Pump body; 189-Impeller; 190-Key 6; 191-Pump output shaft; 192-Deep groove ball bearing 3; 193-Deep groove ball bearing 4; 194-Pump cover; 195-Screw 92; 196-Screw 93; 197-Screw 94; 198-Screw 90; 199-Screw 91; 200-Hydrogen Pipe 3; 201-Secondary Pressure Regulator; 202-Hydrogen Pipe 4; 203-Hydrogen Tail Gas Purifier; 204-Screw 99; 205-Screw 100; 206-Screw 101; 207-Screw 102; 208-Flame Arrester; 209-Hydrogen Pipe 6; 210-One-Way Valve Body; 211-Spring; 212-Steel Ball; 213-Hydrogen Pipe 5; 214-Hydrogen Fuel Cell; 215-Screw 95; 216-Screw 96; 217-Screw 97; 218-Screw 98; 219-Water Pipe 3; 220-Water Pipe 4; 221-Water Tank; 222-Screw 111; 223-Screw 112;224-Screw 113; 225-Screw 114; 226-Water pipe 2; 227-Radiator; 228-Fan 1; 229-Key 7; 230-Radiator output shaft 1; 231-Fan 2; 232-Key 8; 233-Radiator output shaft 2; 234-Screw 107; 235-Screw 108; 236-Screw 109; 237-Screw 110; 238-Water pipe 1; 239-Water pump body; 240-Water pump motor; 241-Water pump motor output shaft; 242-Key 9; 243-Turbine blade; 244-Screw 103; 245-Screw 104; 246-Screw 105; 247-Screw 106; 248-Wheel 1; 249 - Wheel 2; 250- Steering knuckle 1; 251- Screw 115; 252- Screw 116; 253- Screw 117; 254- Screw 118; 255- Screw 119; 256- Deep groove ball bearing 5; 257- Deep groove ball bearing 7; 258- Fixing rod; 259- Screw 125; 260- Screw 126; 261- Screw 127; 262- Screw 128; 263- Steering rack; 264- Steering gear; 265- Key 10; 266- Universal joint 1; 267- Universal joint 1; 268- Steering knuckle 2; 269- Screw 120; 270- Screw 121; 271- Screw 122; 272- Screw 123; 273-Screw 124; 274-Deep Groove Ball Bearing 6; 275-Deep Groove Ball Bearing 8; 276-Universal Joint 2; 277-Steering Drive Shaft; 278-Universal Joint 3; 279-Steering Wheel; 280-Universal Joint 4; 281-Universal Joint 2; 282-Wheel 3; 283-Wheel 4; 284-Hydrogen Power Engine; 285-Screw 129; 286-Screw 130; 287-Screw 131; 288-Screw 132; 289-Engine Output Shaft; 290-Key 11; 291-Coupling Housing 1; 292-Coupling Housing 2; 293-Screw 133; 294-Screw 134; 295- Nut 6; 296-Nut 7; 297-Key 12; 298-Plum blossom-shaped elastomer; 299-Coupling housing 3; 300-Coupling housing 4; 301-Screw 135; 302-Screw 136; 303-Nut 8; 304-Nut 9; 305-Reducer input shaft; 306-Reducer upper housing; 307-Screw 141; 308-Screw 142; 309-Screw 143; 310-Screw 144; 311-Deep groove ball bearing 9; 312-Key 13; 313-Reducer first-stage drive gear; 314-Reducer second-stage driven gear; 315-Key 16; 316-Reducer intermediate shaft 2; 317-Deep groove ball bearing 11; 318-Key 17;319 - Third-stage drive gear of the reducer; 320 - First-stage driven gear of the reducer; 321 - Key fourteen; 322 - Intermediate shaft one of the reducer; 323 - Deep groove ball bearing ten; 324 - Key fifteen; 325 - Second-stage drive gear of the reducer; 326 - Third-stage driven gear of the reducer; 327 - Key eighteen; 328 - Deep groove ball bearing twelfth; 329 - Output shaft of the reducer; 330 - Key nineteen; 331 - Lower housing of the reducer; 332 - Screw one hundred and thirty-seven; 333 - Screw one hundred and thirty-eight; 334 - Screw one hundred and thirty-nine; 335 - Screw one hundred and forty; 336 - Pulley one; 337 - Belt; 338 - Pulley two; 339 - Key twenty; 340 - Universal shaft; 341 - Hub flange three; 342 - Screw one hundred and forty-five; 343 - Screw one hundred and forty-six; 344 - Screw one hundred and forty-seven 345-Screw 148; 346-Screw 149; 347-Deep Groove Ball Bearing 13; 348-Rear Wheel Drive Half Shaft 1; 349-Deep Groove Ball Bearing 14; 350-Cross-type Universal Joint 5; 351-Driving Gear; 352-Driven Gear; 353-Gear 1; 354-Gear Thrust Retaining Clip 1; 355-Gear Support Seat 1; 356-Rear Wheel Drive Half Shaft 2; 357-Deep Groove Ball Bearing 15; 358-Deep Groove Ball Bearing 16; 359-Hub Flange 4; 360-Screw 150; 361-Screw 151; 362-Screw 152; 363-Screw 153; 364-Screw 154; 365-Side Gear 1; 366-Gear Support Seat 2; 367-Gear Thrust Retaining Clip 2; 368-Gear 2; 369-Side Gear 2. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate preferred embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0044] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] See Figures 1 to 17A leaf sweeping vehicle with coaxial suction crushing and top-mounted compression, comprising a vehicle body shell 1, an electric motor 1, a screw 1, a screw 2, a disc brush 1, an electric motor 2, a screw 3, a screw 4, a disc brush 1, a screw 5, a screw 6, a screw 3, a screw 4, a disc brush 2, an electric motor 3, a screw 5, a screw 11, a screw 6, a disc brush 3, a vertical roller brush 1, a motor 1, a screw 15, a screw 9, a screw 10, a vertical roller brush 2, a disc brush 4, an electric motor 4, a screw 7, a screw 8, a motor 2, a screw 11, a screw 24, and a screw 15. 25. Slide Gasket 26. Slide 27. Screw 42 28. Screw 43 29. Screw 44 30. Screw 45 31. Pipe Gasket 2 32. Pipe 2 33. Screw 38 34. Screw 39 35. Screw 40 36. Screw 41 37. Screw 34 38. Screw 35 39. Screw 36 40. Screw 37 41. Pipe Gasket 1 42. Centrifugal Fan Cover 43. Collector Cover Gasket 1 44. Collector Cover 45. Collector Cover Gasket 2 46. Pipe 1 47. Inlet Gasket 48. Screw 13 49. Screw 50. Wire 14, 51. Screw 15, 52. Screw 16, 53. Screw 17, 54. Screw 19, 55. Screw 20, 56. Screw 21, 57. Screw 22, 58. Screw 23, 59. Screw 24, 60. Feed Inlet, 61. Motor Output Shaft, 62. Key 1, 63. Large Pulley, 64. Multi-Wedge Belt, 65. Small Pulley, 66. Positioning Shoulder, 67. Bearing Housing 1, 68. Deep Groove Ball Bearing 1, 69. Motor 3, 70. Screw 46, 71. Screw 47, 72. Screw 48, 73. Screw 49, 74. Shaft, 75. Key 2, 76. Bearing 77. Seat 2, 78. Deep groove ball bearing 2, 79. Shaft protection end cover, 80. End cover gasket, 81. Screw 30, 82. Screw 31, 83. Screw 32, 84. Screw 33, 85. Top cover 1, 86. Screw 25, 87. Screw 26, 88. Screw 27, 89. Top cover gasket, 90. Top cover 2, 91. Blade 1, 92. Blade 2, 93. Blade 3, 94. Turbine blade, 95. Screw 28, 96. Screw 29, 97. Blade gasket 1, 98. Blade gasket 2, 99. Blade gasket 3, 100. Blade gasket 4, 101. Blade gasket 5, 102.

[0048] Electric motor 2 has threaded holes on both sides of its housing, which are fastened to the left front connecting arm of the vehicle body by screws 1-3 and 2-4. Electric motor 6 is fastened to the right front connecting arm of the vehicle body by screws 3-7 and 4-8. Electric motor 10 is fastened to the left side connecting arm of the vehicle body by screws 5-11 and 6-12. Electric motor 20 is fastened to the right side connecting arm of the vehicle body by screws 7-21 and 8-22. The output shafts of electric motors 2, 6, 10, and 20 are machined with external splines, which form a spline fit with the internal spline holes of disc brushes 5, 9, 13, and 19, and are axially fixed by clamping screws and washers. Motor 15 is fixed to the bottom of the vehicle body by screws 9-16 and 10-17; Motor 23 is fixed to the bottom of the vehicle body by screws 11-24 and 12-25. The output shafts of motor 15 and motor 23 are machined with external splines, which form a spline fit with the internal spline holes of vertical roller brush 14 and vertical roller brush 28, and are axially fixed by clamping screws and washers.

[0049] When the motor is started, the disc brush and the vertical roller brush rotate, and the flexible brush bristles come into contact with the ground, sweeping and gathering the fallen leaves toward the center of the vehicle.

[0050] The feed inlet 61 and feed inlet gasket 48 are fixed to one end face of pipe 47 by screws 13 49, 14 50, 15 51, 16 52, 17 53 and 18 54. The collector cover gasket 1 44 is clamped between the other end face of pipe 47 and the end face of collector cover 45; the collector cover gasket 2 46 is clamped between the end face of collector cover 45 and the end face of centrifugal fan cover 43; they are coaxially fixed by screws 19 55, 20 56, 21 57, 22 58, 23 59 and 24 60. The bottom of centrifugal fan cover 43 is embedded in the positioning groove of the bracket.

[0051] Motor 3 70 is fixed to the bracket by screws 46 71, 47 72, 48 73, and 49 74. Bearing housing 1 68 and bearing housing 2 77 are respectively fixed to the centrifugal fan casing 43 or the vehicle chassis, allowing the drive shaft 75 to be rotatably supported inside the suction pipe. Motor output shaft 62 is connected to large pulley 64 via key 1 63; large pulley 64 drives small pulley 66 via multi-ribbed belt 65; small pulley 66 is connected to shaft 75 via key 2 76. Shaft 75 is supported within bearing housing 1 68 and bearing housing 2 77 by deep groove ball bearing 1 69 and deep groove ball bearing 2 78.

[0052] The shaft 75 is connected to the turbine blades 95 of the centrifugal fan impeller via a flat key. Simultaneously, screws 25 (86), 26 (87), 27 (88), 28 (96), and 29 (97) and the flange-type hub drive the front-end blades 1 (91), 2 (92), 3 (93), and 4 (94) to rotate synchronously. Specifically, screws 25 (86), 26 (87), 27 (88), 28 (96), and 29 (97) sequentially pass through the top cover 1 (85), blade gaskets 1 (98), 1 (91), 2 (99), 2 (92), 3 (100), 3 (93), 4 (101), 4 (94), and 5 (102) and are securely connected to the flange-type hub at the bottom of the turbine blades 95. Specifically, blade gasket 1 98 is clamped between blade 1 91 and top cover 1 85; blade gasket 2 99 is clamped between blade 1 91 and blade 2 92; blade gasket 3 100 is clamped between blade 2 92 and blade 3 93; blade gasket 4 101 is clamped between blade 3 93 and blade 4 94; and blade gasket 5 102 is clamped between blade 4 94 and the flange hub of turbine blade 95. Top cover 2 90 is coaxially fastened via circumferentially distributed threads on the top of top cover 1 85, and top cover gasket 89 is clamped between top cover 2 90 and top cover 1 85.

[0053] Working principle: Starting motor 70 rotates shaft 75, driving the centrifugal fan impeller 95 to rotate at high speed, generating negative pressure. Simultaneously, the flanged hub drives the blade assembly to rotate synchronously. This negative pressure draws the collected fallen leaves into the fan through inlet 61 and pipe 47. During this process, the blade assembly cuts and pulverizes the leaves, achieving "pulverization upon suction." The pulverized leaves are then carried by the airflow through pipe 33 and hopper 27 into the leaf collection box.

[0054] See Figures 5 to 7 The top-mounted compression assembly includes a rodless chamber end cap 103, a hydraulic cylinder 112, a piston 157, a guide ring 156, a guide ring 158, a piston seal 159, a piston rod 160, a compaction plate 161, a hydraulic motor 134, a hydraulic pump 121, a solenoid directional valve 129, an oil tank 127, a return oil filter 147, an air cooler 141, and corresponding oil pipes.

[0055] The hydraulic cylinder 112 is fixed to the top plate of the leaf collection box 120 by screws 75 113, 76 114, 77 115, 78 116, 79 117, and 80 118; the rodless end cap 103 is connected to the top flange of the hydraulic cylinder 112 by screws 81 104, 82 105, 83 106, 84 107, 85 108, and 86 109; the compaction plate 161 is screwed to the piston rod 160 by the external thread at the end of the piston rod. The piston rod 160 passes through the inside of the hydraulic cylinder 112 and forms a sliding seal through the guide ring and the piston seal ring.

[0056] Hydraulic motor 134 drives hydraulic pump 121 through cross-slider coupling bushing 163, center slider 165, and cross-slider coupling bushing 166. Hydraulic pump 121 is directly connected to solenoid directional valve 129 through oil pipe 126. Hydraulic oil in oil tank 127 enters the suction side of return oil filter 147 through pipeline. The outlet of return oil filter 147 is connected to air cooler 141 through oil pipe 146. The outlet of air cooler 141 is connected to the suction port of hydraulic pump 121 through oil pipe 128. The outlet of hydraulic pump 121 is connected to the inlet of solenoid directional valve 129 through oil pipe 126. The return port of solenoid directional valve 129 is connected to oil tank 127 after passing through air cooler 141 and return oil filter 147, forming a hydraulic circulation loop. High-pressure oil enters the rodless chamber of the hydraulic cylinder through oil pipe 110, pushing piston 157 to extend compaction plate 161 and apply pressure to the fallen leaves in the collection box; during the return stroke, high-pressure oil enters the rod chamber of the hydraulic cylinder through oil pipe 119, compaction plate retracts, and low-pressure return oil returns to the oil tank through air cooler and return oil filter.

[0057] See Figures 8 to 10 The hydrogen storage tank 176 is fixed to the bottom of the vehicle body via clamp-type support 169 and clamp-type support 177. An overflow valve 184 is integrated into the opening of the hydrogen storage tank. Hydrogen delivery pipe 185 connects the overflow valve 184 to the primary pressure reducing valve 186; hydrogen delivery pipe 287 connects the primary pressure reducing valve 186 to the pump body 188 of the booster pump; the booster pump consists of the pump body 188, impeller 189, pump output shaft 191, deep groove ball bearing 3 192, deep groove ball bearing 4 193, and pump cover 194, further pressurizing the medium-pressure hydrogen. Hydrogen delivery pipe 3 200 connects the pump cover 194 to the secondary pressure reducing valve 201; hydrogen delivery pipe 4 202 connects the secondary pressure reducing valve 201 to the anode of the hydrogen fuel cell 214.

[0058] The tail gas from the cathode of the hydrogen fuel cell 214 enters the one-way valve body 210 via hydrogen supply pipe 213. The one-way valve body 210 contains a spring 211 and a steel ball 212. One end of the spring 211 abuts against an annular guide boss inside the valve cavity, and the other end contacts the surface of the steel ball 212. The steel ball 212 is pressed tightly against the sealing surface by the pressure of the spring 211. During normal operation, the tail gas pressure overcomes the force of the spring 211 and pushes open the steel ball 212, allowing forward flow. When reverse airflow occurs, the tail gas pressure and the spring force together press the steel ball 212 tightly against the sealing surface, achieving reverse shut-off. The tail gas after passing through the one-way valve enters the flame arrester 208 via hydrogen supply pipe 209, and then enters the hydrogen tail gas purifier 203. When the exhaust gas flows in reverse or backfire occurs, the one-way valve body 210 and the flame arrester 208 close or block the flame in sequence; the hydrogen exhaust gas purifier 203 is filled with a catalyst and optionally equipped with a heating element; when the exhaust gas flows through, the residual hydrogen reacts with oxygen under the action of the catalyst to generate water vapor, which is then safely discharged into the atmosphere.

[0059] See Figures 11 to 13 The cooling mechanism includes a water pump body 239, a water pump motor 240, water pipe one 238, water pipe two 226, water pipe three 219, water pipe four 220, a water tank 221, a radiator 227, a fan one 228, and a fan two 231. The water pump motor 240 drives the turbine blades 243 to rotate, drawing cooling water from the water tank 221. The water then enters the water pump chamber through water pipe two 226, the radiator 227, and water pipe one 238 for pressurization. After pressurization, the cooling water enters from the lower interface of the hydrogen fuel cell 214 through water pipe four 220 and exits from the upper interface, returning to the water tank 221 through water pipe three 219. In the water tank 211, high-temperature water and low-temperature water mix, and then enter the radiator 227 through water pipe two 226. The fan of the radiator 227 rotates to generate forced airflow that carries away heat.

[0060] The steering mechanism employs a steering wheel, a cross-shaped universal joint drive, and a rack and pinion mechanism. The steering knuckle is hinged to the fixed rod at multiple points, enabling flexible steering (see details for the specific structure). Figure 14 ).

[0061] The drive mechanism employs a hydrogen-powered engine, a plum-shaped flexible coupling, a three-stage reduction gear set, belt drive, universal joint, orthogonal gear pairs, and a differential mechanism to transmit power to the rear wheels (see details). Figures 15 to 17 ).

[0062] The operator starts the hydrogen power unit, and the hydrogen fuel cell outputs electricity to drive the vehicle's movement and operations. The circular brush and vertical roller brush of the sweeping mechanism are activated to gather fallen leaves towards the center of the vehicle. The motor of the coaxial suction and pulverizing assembly is started, and the centrifugal fan generates negative pressure to suck in the fallen leaves and pulverize them during the suction process. The pulverized leaves then enter the collection box. When a certain amount of fallen leaves accumulates in the collection box, the top-mounted compression assembly is activated, and the hydraulic cylinder drives the compaction plate to compress the fallen leaves. Simultaneously, the cooling mechanism circulates and cools the hydrogen fuel cell, and the hydrogen exhaust gas is safely discharged after being treated by a three-stage safety chain.

[0063] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A leaf sweeping vehicle with coaxial suction crushing and top-mounted compression, comprising a chassis (154), a sweeping mechanism, a collection mechanism, and a compression mechanism, characterized in that: The sweeping mechanism is used to guide fallen leaves to the collection mechanism; The collection mechanism includes a feed inlet (61), a suction pipe, a coaxial suction and crushing assembly, and a leaf collection box (120); the feed inlet (61) is connected to the suction pipe and is located upstream of the coaxial suction and crushing assembly; The coaxial suction pulverizing assembly includes a centrifugal fan impeller (95), a blade assembly, and a drive shaft (75). The blade assembly is coaxially fixed on the same drive shaft (75) as the centrifugal fan impeller (95), and the blade assembly is located upstream of the material flow of the centrifugal fan impeller (95) so that the fallen leaves are shredded before entering the centrifugal fan impeller (95). The drive shaft (75) is used to connect to a drive device. The compression mechanism includes a top-mounted compression assembly disposed on the top of the leaf collection box (120). The top-mounted compression assembly includes a hydraulic cylinder (112) and a compaction plate (161). The cylinder body of the hydraulic cylinder (112) is fixed to the outside of the top plate of the leaf collection box (120). The compaction plate (161) is disposed inside the leaf collection box (120) and connected to the piston rod (160) of the hydraulic cylinder (112) so as to reciprocate vertically inside the leaf collection box (120) to compact the fallen leaves.

2. The leaf sweeping vehicle according to claim 1, characterized in that: The blade assembly includes multiple blades 1 (91), blade 2 (92), blade 3 (93), and blade 4 (94) arranged sequentially along the axial direction of the drive shaft (75). Blade 1 (91), blade 2 (92), blade 3 (93), and blade 4 (94) are rigidly fixedly connected to the drive shaft (75) through the same flange hub.

3. The leaf sweeping vehicle according to claim 2, characterized in that: Buffer pads are provided between adjacent blades, between the blade assembly and the centrifugal fan impeller (95), and between the blade assembly and the top cover.

4. The leaf sweeping vehicle according to claim 3, characterized in that: The buffer pads include a first buffer pad disposed between the blade assembly and the top cover, and a second buffer pad disposed between adjacent blades.

5. The leaf sweeping vehicle according to claim 1, characterized in that: The hydraulic cylinder (112) is located outside the leaf collection box (120), and the compaction plate (161) is located inside the leaf collection box (120). The compression space and the leaf collection space are shared.

6. The leaf sweeping vehicle according to claim 5, characterized in that: The top-mounted compression assembly also includes a hydraulic pump (121), an electromagnetic reversing valve (129), an air cooler (141), a return oil filter (147), and an oil tank (127). The return oil port of the electromagnetic reversing valve (129) is connected to the oil tank (127) after passing through the air cooler (141) and the return oil filter (147) in sequence. The oil tank (127) is connected to the suction port of the hydraulic pump (121) to form a hydraulic circulation loop.

7. The leaf sweeping vehicle according to claim 1, characterized in that: It also includes a hydrogen power unit, which includes a hydrogen storage tank (176), a primary pressure reducing valve (186), a booster pump (188), a secondary pressure reducing valve (201), and a hydrogen fuel cell (214).

8. The leaf sweeping vehicle according to claim 7, characterized in that: The exhaust outlet of the hydrogen fuel cell (214) is sequentially connected to a one-way valve (210), a flame arrester (208), and a hydrogen exhaust purifier (203), forming a three-stage safety treatment structure for the exhaust gas.

9. The leaf sweeping vehicle according to claim 7, characterized in that: It also includes a cooling mechanism, which includes a water pump (239), a water tank (221), a radiator (227), a fan (228), and a fan (231); the water pump (239), the hydrogen fuel cell (214), the water tank (221), and the radiator (227) are connected in sequence through cooling pipes to form a circulating cooling circuit.

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