Preceding-stage sweeping system of road sweeper

Abstract

The invention provides a preceding-stage sweeping system of a road sweeper, which is characterized in that a left liftable garbage sweeping head and a right liftable garbage sweeping head are hung below the middle part of a girder of a frame through a hanging bracket, and an inclined garbage conveying belt with a low front part and a high rear part is arranged at the middle line position behind the two garbage sweeping heads; the front end of the garbage conveying belt extends into the overlapping position of the strip brushes on the adjacent sides of the two garbage cleaning heads, and the two garbage cleaning heads are provided with limiting mechanisms so that the strip brushes can be automatically lifted when rotating to pass through the front end of the garbage conveying belt. In the working process, the strip brushes with the two garbage sweeping heads rotating reversely can continuously sweep garbage from the side of the vehicle body to the middle line of the vehicle body and feed the garbage into the front end of the garbage conveying belt which is obliquely erected, and then the garbage conveying belt conveys the garbage to the rear upper portion. The system is short in garbage sweeping and conveying path, reasonable in structural connection, high in working efficiency and simple in component, the manufacturing cost can be reduced, and the garbage sweeping head can move out of the left side or the right side of the vehicle body by a certain distance to sweep curbstone corners on the two sides of a road.

Description

Technical Field

[0001] The present invention relates to a component of a road sweeper, specifically a front-stage cleaning system installed below the middle of the frame girder of a road sweeper, belonging to the technical field of environmental sanitation machinery and equipment. Background Art

[0002] In the applicant's prior Chinese patent CN202420583249.9, a new type of energy-saving and environment-friendly road sweeper with a novel structure is disclosed. Two garbage cleaning heads are installed at the front end of the front cross beam of the frame; two garbage rolling brushes arranged oppositely at intervals left and right are installed in the middle below the frame; a garbage collection conveyor is installed at the rear part below the frame. The garbage collection conveyor is provided with a roller brush conveying structure and a spiral conveying structure connected front and back. The conveying pipeline of the spiral conveying structure extends upward to the vehicle-mounted garbage bin. During operation, first, the garbage cleaning heads sweep the garbage from the left and right sides in front of the vehicle towards the center line in front of the vehicle, then the garbage rolling brushes sweep the garbage from the left and right sides under the vehicle towards the center line under the vehicle, and finally, the garbage collection conveyor uses a combination of roller brush conveying and spiral conveying to convey the garbage swept together at the center line under the vehicle upward to the vehicle-mounted garbage bin for collection.

[0003] In the above patent, the cleaning components equipped on the road sweeper include a three-stage configuration of two garbage cleaning heads, two garbage rolling brushes, and a garbage collection conveyor. The overall structure is relatively complex and the manufacturing cost is relatively high. Therefore, the applicant has upgraded and optimized the cleaning components of this road sweeper, improving the three-stage configuration to a front and rear two-stage cleaning system completely installed below the middle of the frame girder. The front-stage cleaning system is provided with two garbage cleaning heads with improved structures, and an inclined garbage conveyor belt with a lower front and a higher rear is arranged at the center line position behind the two garbage cleaning heads. The two garbage cleaning heads rotate and brush the road passed by the vehicle body and continuously feed the swept garbage into the garbage conveyor belt, and then the garbage conveyor belt conveys the garbage to the upper rear side. Summary of the Invention

[0004] The purpose of the present invention is to provide a front-stage cleaning system for a road sweeper, which is installed at a position close to the front below the middle of the frame girder and is used for rotating and brushing the road passed by the vehicle body and conveying the swept garbage to the upper rear side.

[0005] The specific technical solution of the present invention is as follows: A front-stage cleaning system for a road sweeper is provided with a horizontal transverse hanger fixedly installed on the frame girder. On the hanger, there are two left and right transverse sliding frames that can slide left and right along the hanger. The transverse sliding frames are driven by electric transverse push rods. Below each of the two left and right transverse sliding frames, there is a vertical garbage cleaning head with multiple radially spaced brush strips. The transverse sliding frame hangs the garbage cleaning head through a lifting rope wound around a pulley assembly and is equipped with a winch to control the retraction and release of the lifting rope. The bottom surface of the transverse sliding frame is connected to the rear side of the garbage cleaning head by an anti-torsion plate chain that can bend up and down but cannot swing left and right to limit the left and right swing and torsion of the garbage cleaning head. The bottom surface of the hanger is connected to the front side of the garbage cleaning head by a double-row roller chain that can bend up and down but cannot swing forward and backward to limit the forward and backward swing of the garbage cleaning head; outside the two garbage cleaning heads, there is a double-shaft forward and reverse output reduction mechanism driven by a rotary drive motor. The two output ends of the double-shaft forward and reverse output reduction mechanism are respectively connected to the rotary power input ends of the two garbage cleaning heads through flexible shaft connecting rods, thereby driving the brush strips of the two garbage cleaning heads to rotate synchronously in the reverse direction. The brush strip of the left garbage cleaning head rotates clockwise when viewed from above, and the brush strip of the right garbage cleaning head rotates counterclockwise when viewed from above. And the brush strips on the adjacent sides of the two garbage cleaning heads are distributed in a staggered manner with partial overlap in the rotation phase; at the midline position behind the two garbage cleaning heads, there is a garbage conveyor belt that conveys from the front lower direction to the rear upper direction. The front end of the garbage conveyor belt extends into the overlapping area of the adjacent side brush strips of the two garbage cleaning heads. The two garbage cleaning heads are provided with a limiting mechanism to automatically lift the brush strips when they rotate past the front end of the garbage conveyor belt, thereby realizing the transition of the brush strips from brushing the ground to feeding the garbage conveyor belt.

[0006] The front-stage cleaning system of this road sweeper hangs two left and right liftable garbage cleaning heads below the middle part of the frame girder through a hanger, and sets an inclined garbage conveyor belt with a lower front and a higher rear at the midline position behind the two garbage cleaning heads. During operation, the brush strips rotating in the reverse direction of the two garbage cleaning heads can continuously sweep the garbage from the side of the vehicle body to the midline of the vehicle body and feed it into the front end of the inclined garbage conveyor belt, and then the garbage conveyor belt conveys the garbage to the rear upper direction. The garbage cleaning and transmission path of this system is short, the structural connection is reasonable, the working efficiency is high, the components are simple, and the manufacturing cost can be reduced. In addition, this system drives the two garbage cleaning heads to move synchronously left or right slightly by driving the transverse sliding frame, so that the outer brush strips of the garbage cleaning heads can move out a certain distance to the left or right side of the vehicle body, that is, the road edge corners on both sides of the road can be cleaned. Since the width of the garbage conveyor belt is sufficient, when the garbage cleaning heads move left or right, the adjacent side brush strips of the two garbage cleaning heads can still keep feeding the front end of the garbage conveyor belt. Description of the Drawings

[0007] Figure 1 It is a three-dimensional structural schematic diagram of the front-stage cleaning system of this road sweeper.

[0008] Figure 2 The Figure 1 right-side view as shown.

[0009] Figure 3 The Figure 1 top-plan view as shown.

[0010] Figure 4 Schematic diagram of the three-dimensional structure of the garbage cleaning head suspended by the hanger on the right side through the transverse moving carriage.

[0011] Figure 5 The Figure 4 right-side view as shown.

[0012] Figure 6 Schematic diagram of the three-dimensional structure of the garbage cleaning head on the right side after removing the worm and worm gear reducer.

[0013] Figure 7 The Figure 6 top-plan view of

[0014] Figure 8 The Figure 6 schematic diagram of the three-dimensional structure when rotated to the back facing forward.

[0015] Figure 9 The Figure 8 schematic diagram of the three-dimensional structure of the drive assembly in

[0016] Figure 10 The Figure 8 schematic diagram of the three-dimensional structure of the brush sweeping assembly in

[0017] Figure 11 Schematic diagram of the three-dimensional structure of the garbage conveyor belt.

[0018] Figure 12 The Figure 11 right-side view of

[0019] Figure 13 Right-side view of the front-stage cleaning system of this road sweeper after being installed on the frame girder.

[0020] In the figure: 1 - frame girder, 2 - hanging bracket, 3 - transverse moving carriage, 4 - electric transverse moving push rod, 5 - strip brush, 6 - garbage cleaning head, 7 - suspension rope, 8 - winch, 9 - plate chain, 10 - double-row roller chain, 11 - rotary drive motor, 12 - double-shaft forward and reverse output reduction mechanism, 13 - flexible shaft connecting rod, 14 - garbage conveyor belt, 15 - chassis, 16 - support wheel, 17 - main shaft, 18 - brush head mounting seat, 19 - brush head module, 20 - upper top pulley, 21 - lower top pulley, 22 - upper pulling spring, 23 - intermediate support frame, 23.1 - central cylinder, 23.2 - support rod, 23.3 - support disc, 23.4 - upper extending screw rod, 23.5 - support frame, 24 - upper and lower limit frame, 24.1 - upper limit ring, 24.2 - lower limit arc piece, 24.3 - upper support plate, 25 - lifting ring, 25.1 - hanging pulley, 25.2 - connecting handle, 25.3 - spherical plain bearing, 26 - worm and worm gear reducer, 27 - buffer spring, 28 - pressing gasket, 29 - limit pulling spring, 30 - lower suspension chain, 31 - conveying support, 31.1 - caster, 32 - roller, 33 - conveyor belt, 34 - conveying drive motor, 35 - first reduction mechanism, 36 - feeding guide plate, 36.1 - wear-resistant rubber plate, 36.2 - roller, 37 - longitudinal moving carriage, 38 - electric telescopic push rod, 39 - electric lifting rod, 40 - receiving hopper, 41 - screw conveyor pipeline, 42 - second reduction mechanism, 43 - height limit frame. Detailed implementation mode

[0021] The present invention will be further described below with reference to the accompanying drawings. In the description of the present invention, the orientation terms of "front", "rear", "left", "right", "upper" and "lower" are defined based on the orientation Figure 1 , Figure 4 , Figure 6 , Figure 11 indicated in the drawings, and the perspective of the road sweeper driver is adopted.

[0022] Such as Figures 1 - 13As shown in the figure, the front-stage cleaning system of this road sweeper is provided with a horizontal transverse hanger 2 fixedly installed on the frame girder 1. On the hanger 2, there are two left and right transverse sliding frames 3 that can slide left and right along the hanger 2. The transverse sliding frame 3 is driven by an electric transverse push rod 4. Below each of the two left and right transverse sliding frames 3, there is a vertical garbage cleaning head 6 with multiple radially spaced strip brushes 5. The transverse sliding frame 3 hangs the garbage cleaning head 6 through a lifting rope 7 wound around a pulley assembly and is equipped with a winch 8 to control the retraction and release of the lifting rope 7. The bottom surface of the transverse sliding frame 3 is provided with an anti-torsion plate chain 9 that can bend up and down but cannot swing left and right, which is connected to the rear side of the garbage cleaning head 6 to limit the left and right swing and torsion of the garbage cleaning head 6. The bottom surface of the hanger 2 is provided with a double-row roller chain 10 that can bend up and down but cannot swing forward and backward, which is connected to the front side of the garbage cleaning head 6 to limit the forward and backward swing of the garbage cleaning head 6; outside the two garbage cleaning heads 6, there is a double-shaft forward and reverse output reduction mechanism 12 driven by a rotary drive motor 11. The two output ends of the double-shaft forward and reverse output reduction mechanism 12 are respectively connected to the rotary power input ends of the two garbage cleaning heads 6 through flexible shaft connecting rods 13, thereby driving the strip brushes 5 of the two garbage cleaning heads 6 to rotate synchronously in reverse. The strip brush 5 of the left garbage cleaning head 6 rotates clockwise when viewed from above, and the strip brush 5 of the right garbage cleaning head 6 rotates counterclockwise when viewed from above. Moreover, the strip brushes 5 on the adjacent sides of the two garbage cleaning heads 6 are distributed in a staggered manner with partial overlap in the rotation phase to avoid movement interference; at the midline position behind the two garbage cleaning heads 6, there is a garbage conveyor belt 14 that conveys from the front lower direction to the rear upper direction. The front end of the garbage conveyor belt 14 extends into the overlapping area of the strip brushes 5 on the adjacent sides of the two garbage cleaning heads 6. The two garbage cleaning heads 6 are provided with a limiting mechanism to automatically lift the strip brushes 5 when they rotate past the front end of the garbage conveyor belt 14, thereby realizing the transition of the strip brushes 5 from brushing the ground to feeding the garbage conveyor belt 14.

[0023] The garbage cleaning head 6 is provided with a brushing component and a driving component; the brushing component is provided with a chassis 15. A group of evenly distributed support wheels 16 are provided on the outer periphery of the bottom surface of the chassis 15. A vertically oriented main shaft 17 that can rotate in place is installed on the center of the top surface of the chassis 15 through a bearing. In the middle section of the main shaft 17, there is a brush head mounting seat 18 that rotates synchronously with the main shaft 17. The center of the brush head mounting seat 18 is a core cylinder fixedly connected to the main shaft. A plurality of pairs of radially outwardly extending vertical clamping pieces are evenly welded on the outer circumference of the core cylinder. Each pair of clamping pieces of the brush head mounting seat 18 is hinged with a brush head module 19 that extends outward and can deflect up and down in a clamping groove; the brush head module 19 is provided with an obliquely downwardly extending brush handle. The rear end of the brush handle is hinged in the clamping groove of the clamping piece through a brush handle pin shaft. The front end of the brush handle is fixedly installed with a horizontally outwardly extending strip brush 5. The bristles of the strip brush 5 extend obliquely downward and outward. On the upper side of the front end of the brush handle, there is a top pulley 20 and a bottom pulley 21 installed at a higher position. Between the middle part of the brush handle and the clamping piece, there is an upward pulling spring 22 that elastically pulls the brush head module 19 upward by the upward pulling spring 22.

[0024] The driving assembly is provided with an intermediate support frame 23, upper and lower limit frames 24, a lifting ring 25 and a worm and worm gear reducer 26; a central cylinder 23.1 is provided in the center of the intermediate support frame 23, and the inner cylinder of the central cylinder 23.1 is rotatably connected to the upper section of the main shaft 17 of the brush sweeping assembly through a bearing. A group of radially extending support rods 23.2 evenly distributed along the circumference are fixedly welded on the outer circumference of the central cylinder 23.1; the upper and lower limit frame 24 is composed of an upper limit ring 24.1 and a lower limit arc plate 24.2. The upper limit ring 24.1 is a horizontally placed ring with a horizontal first half and a gradually rising second half. The lower limit arc plate 24.2 is a horizontally placed 1 / 4 arc plate located below the outer periphery of the upper limit ring 24.1. The lower limit arc plate 24.2 is located in the second half of the adjacent sides of the two garbage cleaning heads 6 and gradually rises from front to back. The lower limit arc plate 24.2 and the upper limit ring 24.1 are integrally connected by a connecting rod on the outside. An upper support plate 24.3 is provided on the upper end surface of the upper limit ring 24.1 and is connected to the support rod 23.2 of the intermediate support frame 23. Under the pulling of the upper pulling spring 22, the upper top pulley 20 of the brush handle of the brush sweeping assembly elastically abuts against the lower end surface of the upper limit ring 24.1. When the brush head module 19 rotates to the second half of the adjacent sides of the two garbage cleaning heads 6, the lower top pulley 21 of the brush handle abuts against the upper end surface of the lower limit arc plate 24.2; on the top surface of the support rod 23.2 of the intermediate support frame 23, a support disk 23.3 radially extending outward from the outer circumference of the central cylinder 23.1 is fixedly connected. Upper extension screws 23.4 are fixedly connected to the front and rear sides of the top surface of the support disk 23.3 respectively. A group of upwardly supported support frames 23.5 are also welded on the top surface of the support disk 23.4. The top end of the support frame 23.5 is provided with a worm and worm gear reducer 26 through a fixedly welded bottom plate. The input end of the worm and worm gear reducer 26 is connected to the flexible shaft connecting rod 13, and the output end of the worm and worm gear reducer 26 is fixedly connected to the upper end of the main shaft 17 of the brush sweeping assembly. The main shaft 17 is driven to rotate in place by the worm and worm gear reducer 26; the lifting ring 25 is a horizontally thick-walled ring arranged above the support disk 23.3 of the intermediate support frame 23. Hanging pulleys 25.1 for the suspension ropes 7 to wind around are welded on the left and right sides of the lifting ring 25. Connecting handles 25.2 are provided on the rear and front sides of the lifting ring 25 and are respectively connected to the plate chain 9 and the double-row roller chain 10. Eye joint bearings 25.3 are provided on the front and rear sides of the inner circumference of the lifting ring 25 through fixed support plates respectively. The lifting ring 25 is movably sleeved on the two upper extension screws 23.4 of the support disk 23.3 through two eye joint bearings 25.3. Buffer springs 27 are sleeved on the upper and lower ends of the corresponding eye joint bearings 25.3 of the upper extension screws 23.4, and pressure pads 28 are provided to press the buffer springs 27. A plurality of groups of spaced limit tension springs 29 are hung inside the circumference of the lifting ring 25, and the ends of the limit tension springs 29 are respectively connected to the top surface of the support disk 23.3 and the support frame 23.5 on the top surface of the support disk 23.3 to limit the support disk 23.3. Horizontal yaw below the lifting ring 25. A group of lower suspension chains 30 evenly distributed along the circular ring are connected to the lower side of the lifting ring 25. The ends of the lower suspension chains 30 are respectively connected to the corresponding lugs on the top surface of the support disc 23.3, and the lower suspension chains 30 are in a relaxed state.

[0025] Furthermore, the support wheels 16 on the bottom surface of the chassis 15 include a directional wheel and multiple universal wheels.

[0026] Furthermore, the upper support plate of the upper limit ring 24.3 is provided with multiple groups of connection hole positions with different heights. The installation height of the upper and lower limit frames 24 is adjusted by selecting connection hole positions with different heights to connect with the support rods 23.2 of the intermediate support frame 23.

[0027] The garbage conveyor belt 14 is provided with a conveying support 31 erected with a front-low and rear-high inclination. Inside the conveying support 31, a loop of rough-surface wide conveyor belt 33 with a front-low and rear-high inclination is supported by a group of horizontally transverse rollers 32. The last roller 32 is supported by bearings on a fixed support below the frame girder 1 of the vehicle frame. The last roller 32 is driven to rotate by a conveying drive motor 34 through a first reduction mechanism 35, so that the upper surface of the conveyor belt 33 realizes the conveying from the front lower direction to the rear upper direction; on both sides of the front part of the conveying support 31, casters 31.1 that extend forward and downward along the conveying support 31 for ground contact support and have adjustable installation heights are respectively erected. In the front part of the conveying support 31, above the front end of the conveyor belt 33, a feeding guide plate 36 that can slide and stretch forward and downward is erected. The feeding guide plate 36 is supported by a longitudinal sliding frame 37 that can slide longitudinally along the conveying support 31 and is provided with an electric telescopic push rod 38 for driving; on the left and right sides of the middle part of the conveying support 31 on the frame girder 1 of the vehicle frame, electric lifting rods 39 are also provided. The ends of the electric lifting rods 39 are connected to the middle part of the conveying support 31 through hanging chains. The garbage conveyor belt 14 is controlled by the electric lifting rods 39 to be lifted or lowered around the last roller 32; when the garbage conveyor belt 14 is lowered, the front end of the feeding guide plate 36 extends into the overlapping part of the side brushes 5 of two adjacent garbage cleaning heads 6. The side brushes 5 on both sides of two adjacent garbage cleaning heads 6 feed the front end of the conveyor belt 33 through the feeding guide plate 36; Furthermore, a receiving hopper 40 is erected below the rear end of the garbage conveyor belt 14. A spiral conveying pipeline 41 for backward-stage conveying is connected to the side of the bottom of the receiving hopper 40. The spiral conveying blade of the spiral conveying pipeline 41 extends into the receiving hopper 40 and is driven by the conveying drive motor 34 through a second reduction mechanism 42.

[0028] Further, a height-limiting frame 43 for restricting the size of the passing garbage is installed at a position 8-15 cm above the conveyor belt 33 behind the longitudinal moving carriage 37, preventing oversized garbage from being conveyed to the rear and damaging the subsequent conveying equipment or causing conveying jams. A slanting baffle rod is provided on the front side of the height-limiting frame 43. When the conveyor belt 33 continuously conveys backward, the slanting baffle rod can guide the large garbage that cannot pass through the height-limiting frame 43 to slide out from the side of the conveyor belt 33, avoiding the accumulation of large garbage in front of the height-limiting frame 43 and causing blockages.

[0029] Further, the front end of the feeding guide plate 36 is provided with a wear-resistant rubber plate 36.1 as the end, and roller wheels 36.2 for ground contact support and adjustable mounting height are further provided on the left and right sides of the front edge of the wear-resistant rubber plate 36.1.

[0030] Further, dust suction hoods (not shown in the drawings) are respectively provided at positions above the adjacent sides of two garbage cleaning heads 6 and above the rear end of the garbage conveyor belt 14 on the frame girder 1. Dust suction holes are opened on the side of the top surface of the dust suction hood, and the dust suction holes are connected to a dust raising processor above the frame of the road sweeper through a dust suction pipeline, so that the dust raised by cleaning and conveying garbage can be sucked into the dust raising processor for treatment, avoiding the outward diffusion of the dust.

[0031] When the front-stage cleaning system of this road sweeper works, first control the electric transverse moving push rod 4 to drive the transverse moving carriage 3, so that the two garbage cleaning heads 6 are transversely moved to a suitable position below the frame girder 1, and then control the winch 8 to lower the two garbage cleaning heads 6 until the supporting wheels 16 at the bottom touch the ground. Then control the electric lifting rod 39 to lower the garbage conveyor belt 14 so that the casters 31.1 at the front end thereof touch the ground. Then control the electric telescopic push rod 38 to drive the front end of the feeding guide plate 36 to extend forward and downward to the overlapping part of the strip brushes 5 on the adjacent sides of the two garbage cleaning heads 6 and touch the ground. Then start the rotary drive motor 11 to drive the strip brushes 5 of the two garbage cleaning heads 6 to rotate synchronously in the reverse direction, and start the conveyor drive motor 34 to drive the garbage conveyor belt 14 to convey from the front lower part to the rear upper part. The strip brushes 5 of the two garbage cleaning heads 6 rotating in the reverse direction can continuously sweep the garbage from the side of the vehicle bottom to the center line of the vehicle bottom. Under the guiding and limiting of the upper and lower limit frames 24, the strip brushes 5 on the adjacent sides will automatically rise when rotating past the feeding guide plate 36 of the garbage conveyor belt 14, thereby realizing the transition of the strip brushes 5 from brushing the ground to feeding the garbage conveyor belt 14. After the swept garbage is fed into the garbage conveyor belt 14, the garbage conveyor belt 14 conveys the garbage to the rear upper part and automatically drops into the receiving hopper 40, and then the spiral conveying pipeline 41 conveys the garbage in the receiving hopper 40 to the garbage bin above the frame girder 1 for collection.

[0032] In addition, since the lifting ring 25 of the garbage cleaning head 6 is connected to the middle support frame 23 through a spherical joint bearing 25.3 and is equipped with a buffer spring 27 and a limit tension spring 29, the garbage cleaning head can be adaptively deflected and lifted slightly according to the road conditions during operation, and can easily cope with various uneven road surface conditions. When there is a large depression on the road surface, the garbage cleaning head 6 can also be suspended by the lower suspension chain 30 to prevent it from falling into it and causing damage.

[0033] The above illustrations are only typical embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A front cleaning system for a road sweeper, characterized by: The front-stage cleaning system is provided with a horizontal transverse hanger fixedly mounted on the frame beam, and the hanger is provided with two left and right transverse slides that can slide left and right along the hanger, and the transverse slide is provided with an electric transverse push rod for driving, and a vertical garbage cleaning head with multiple radially spaced brushes is provided under the left and right transverse slides respectively, and the transverse slide hangs the garbage cleaning head by a lifting rope passed through and wound on the pulley assembly, and a winch is provided to control the retraction and release of the lifting rope, and the bottom surface of the transverse slide is provided with a torsion-resistant plate chain that can bend up and down but cannot swing left and right, which is connected to the rear side of the garbage cleaning head to limit the left and right swing and twisting of the garbage cleaning head, and the bottom surface of the hanger is provided with a double-row roller chain that can bend up and down but cannot swing forward and backward, which is connected to the front side of the garbage cleaning head to limit the forward and backward swing of the garbage cleaning head; the outer parts of the two garbage cleaning heads are provided with a lifting chain driven by a rotating drive motor The two output ends of the double-axis forward and reverse output speed reduction mechanism are respectively connected to the rotational power input ends of the two garbage cleaning heads through flexible shaft connecting rods, thereby driving the strip brushes of the two garbage cleaning heads to rotate synchronously in the opposite direction, the strip brush of the left garbage cleaning head rotates clockwise when viewed from top to bottom, and the strip brush of the right garbage cleaning head rotates counterclockwise when viewed from top to bottom, and the strip brushes on the adjacent sides of the two garbage cleaning heads are partially overlapped and staggered in rotation phase; a garbage conveyor belt that transports from the front lower to the rear upper is set up at the midline position behind the two garbage cleaning heads, and the front end of the garbage conveyor belt extends into the overlapping part of the strip brushes on the adjacent sides of the two garbage cleaning heads. The two garbage cleaning heads are provided with a limiting mechanism to automatically lift the strip brush when it rotates through the front end of the garbage conveyor belt, thereby realizing the transition of the strip brush from brushing the ground to feeding the garbage conveyor belt.

2. The front cleaning system of the road sweeper according to claim 1, characterized in that: The garbage cleaning head is provided with a brush sweeping assembly and a driving assembly; the brush sweeping assembly is provided with a chassis, a group of evenly distributed supporting wheels are provided on the periphery of the bottom surface of the chassis, a vertical main shaft which can rotate in situ is provided in the center of the top surface of the chassis through a bearing frame, and a brush head mounting seat which rotates synchronously with the main shaft is provided in the middle section of the main shaft, the center of the brush head mounting seat is a core cylinder fixedly connected to the main shaft, and a plurality of pairs of radially outward vertical clips are evenly welded on the outer circumference of the core cylinder, and each pair of clips of the brush head mounting seat is hinged in the clip groove to have a brush head module which extends outward and can deflect up and down; the brush head module is provided with a brush handle which extends downward obliquely, the rear end of the brush handle is hinged in the clip groove of the clip through a brush handle pin shaft, a horizontally extending strip brush is fixedly installed at the front end of the brush handle, and the bristles of the strip brush extend obliquely to the outside downward, and an upper pulley and a lower pulley which are installed high are fixedly connected on the upper side of the front end of the brush handle, and an upper pull spring is connected between the middle part of the brush handle and the clip, and the brush head module is elastically pulled upward by the upper pull spring; The driving assembly is provided with an intermediate support frame, upper and lower limit frames, a lifting ring and a worm gear reducer; a center cylinder is provided in the center of the intermediate support frame, the inner cylinder of the center cylinder is rotatably connected to the upper section of the main shaft of the brush sweeping assembly through a bearing, and a group of support rods evenly distributed along the circumference and extending radially are fixedly welded on the outer circumference of the center cylinder; the upper and lower limit frames are composed of an upper limit ring and a lower limit arc piece, the upper limit ring is a flat circular ring with a horizontal front half circle and a gradually rising rear half circle, the lower limit arc piece is a flat 1 / 4 arc piece located below the outer periphery of the upper limit ring, the lower limit arc piece is located in the rear half of the adjacent sides of the two garbage cleaning heads and gradually rises from front to back, the lower limit arc piece and the upper limit ring are connected as a whole through the outer connecting rod, and the upper end face of the upper limit ring is provided with an upper support plate connected to the support rod of the intermediate support frame Under the pull of the upper pull spring, the upper pulley of the brush handle elastically rests on the lower end surface of the upper limit ring. When the brush head module rotates to the rear half of the adjacent sides of the two garbage cleaning heads, the lower pulley of the brush handle rests on the upper end surface of the lower limit arc piece; the intermediate support frame is fixedly connected to a support plate radially extending from the outer circumference of the center tube on the top surface of the support rod, and the top surface of the support plate is fixedly connected to an upward extending screw on its front and rear sides respectively. A group of support frames that are supported upward are also welded to the top surface of the support plate. A worm gear reducer is arranged on the top of the support frame through a fixedly welded bottom plate frame. The input end of the worm gear reducer is connected to the soft shaft connecting rod, and the output end of the worm gear reducer is fixedly connected to the upper end head of the main shaft of the brush sweeping assembly, and the main shaft is driven by the worm gear reducer to rotate in situ; The lifting ring is a horizontal thick-walled circular ring arranged above the support plate of the middle support frame, and a hanging pulley for the lifting rope to be passed around is welded on the left and right sides of the lifting ring, and a connecting handle is provided on the rear side and the front side of the lifting ring, which are respectively connected to the plate chain and the double-row roller chain, and the inner circumference of the lifting ring is provided with fisheye joint bearings on the front and rear sides respectively through fixed support plates, and the lifting ring is movably connected to the two upward extension screws of the support plate through two fisheye joint bearings, and the upward extension screws are both sleeved with buffer springs at the upper and lower ends of the corresponding fisheye joint bearings and are provided with top pressure washers to press the buffer springs, and a plurality of groups of spaced limit tension springs are hung within the circumference of the lifting ring, and the ends of the limit tension springs are respectively connected to the top surface of the support plate and the support frame on the top surface of the support plate to limit the horizontal deflection of the support plate below the lifting ring, and a group of lower suspension chains evenly distributed along the circular ring are connected to the lower side of the lifting ring, and the ends of each lower suspension chain are respectively connected to the corresponding hanging ears on the top surface of the support plate, and the lower suspension chains remain in a relaxed state.

3. The front cleaning system of the road sweeper according to claim 2 is characterized in that: The supporting wheels on the bottom surface of the chassis include a fixed wheel and a plurality of universal wheels.

4. The front cleaning system of the road sweeper according to claim 2, characterized in that: The upper support plate of the upper limit ring is provided with a plurality of connection holes of different heights, and the installation heights of the upper and lower limit frames are adjusted by selecting connection holes of different heights to connect with the support rods of the middle support frame.

5. The front cleaning system of the road sweeper according to claim 1 is characterized in that: The garbage conveyor belt is provided with a conveying bracket which is inclined and low in front and high in the back. A circle of rough-surface wide conveyor belt which is low in front and high in the back is supported by a group of horizontal and transverse rollers in the conveying bracket. The roller at the rear end is supported on a fixed bracket below the frame beam through a bearing. The roller at the rear end is driven to rotate by a conveying drive motor through a first reduction mechanism, so that the upper belt surface of the conveyor belt can be transported from the front lower to the rear upper. Casters which extend forward and downward along the conveying bracket for ground support and are installed with adjustable height are respectively provided on both sides of the front part of the conveying bracket. A height-adjustable caster is provided on the front part of the conveying bracket above the front end of the conveyor belt. A telescopic feed guide plate slides forward and downward, and is supported by a longitudinal slide that can slide longitudinally along the conveying bracket and is driven by an electric telescopic push rod; the frame beam is also provided with electric lifting rods on the left and right sides of the middle of the conveying bracket, and the ends of the electric lifting rods are connected to the middle of the conveying bracket through hanging chains, and the electric lifting rods control the garbage conveyor belt to be lifted or lowered around the roller at the rear end; when the garbage conveyor belt is lowered, the front end of the feed guide plate extends into the overlapping part of the adjacent side brushes of the two garbage cleaning heads, and the adjacent side brushes of the two garbage cleaning heads feed the front end of the conveyor belt through the feed guide plate.

6. The front cleaning system of the road sweeper according to claim 5, characterized in that: A receiving hopper is set up below the rear end of the garbage conveyor belt, and a spiral conveying pipeline for conveying to the rear stage is connected to the side of the bottom of the receiving hopper. The spiral conveying blades of the spiral conveying pipeline extend into the receiving hopper and are driven by the conveying drive motor through the second reduction mechanism.

7. The front cleaning system of the road sweeper according to claim 5, characterized in that: The longitudinal sliding frame is provided with a height limiting frame for limiting the size of the garbage passing therethrough at a position 8 to 15 cm above the conveyor belt and behind the feed guide plate, and a slanted blocking rod is provided at the front side of the height limiting frame.

8. The front cleaning system of the road sweeper according to claim 5, characterized in that: The front end of the feed guide plate is provided with a wear-resistant rubber plate as an end, and rollers with adjustable installation height for ground support are provided on the left and right sides of the front edge of the wear-resistant rubber plate.

9. The front cleaning system of the road sweeper according to claim 1, characterized in that: The frame beam is provided with dust hoods above the adjacent sides of the two garbage cleaning heads and above the rear end of the garbage conveyor belt. Dust suction holes are opened on the sides of the top surface of the dust hood. The dust suction holes are connected to the dust processor above the road sweeper frame through dust suction pipelines.

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