Preceding-stage sweeping system of road sweeper

Abstract

The utility model 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 utility model relates to the part of road sweeper, concretely is a front stage cleaning system installed in the middle part below of road sweeper frame girder, belongs to the technical field of sanitation mechanical equipment. BACKGROUND

[0002] The applicant's prior Chinese patent CN202420583249.9 discloses a novel energy-saving and environment-friendly road sweeper, two garbage cleaning heads are arranged at the front end of the front cross beam of the frame, two garbage rolling brushes are arranged at the middle part below the frame in a left-right spaced opposite arrangement, a garbage collection conveyor is arranged at the rear part below the frame, the garbage collection conveyor is provided with a rolling brush conveying structure and a spiral conveying structure connected in front and back, and the conveying pipeline of the spiral conveying structure extends to the position of the vehicle-mounted garbage bin.

[0003] In the above-mentioned patent, the cleaning components of the garbage sweeper include a three-stage configuration of two garbage cleaning heads, two garbage rolling brushes and a garbage collection conveyor, and the overall structure is relatively complex and the manufacturing cost is high. Therefore, the applicant upgrades and optimizes the cleaning components of the garbage sweeper, improves the three-stage configuration to a front and rear two-stage cleaning system completely installed below the middle part of the frame girder, wherein the front-stage cleaning system is provided with two improved garbage cleaning heads, and an inclined garbage conveyor belt with a low front and a high rear is arranged at the middle line position behind the two garbage cleaning heads. The two garbage cleaning heads rotate and sweep 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 rear and upper side. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a front-stage cleaning system of a road sweeper, which is installed below the middle part of the frame girder at a front position and used for rotating and sweeping the road passed by the vehicle body and conveying the swept garbage to the rear and upper side.

[0005] The specific technical scheme of the utility model is as follows:

[0006] A front-stage cleaning system of a road sweeper, which is provided with a horizontal transverse hanger fixedly installed on a frame girder, two horizontal transverse carriages capable of sliding leftward and rightward along the hanger are arranged on the hanger, the horizontal transverse carriages are driven by electric horizontal transverse push rods, a vertical garbage cleaning head provided with a plurality of radially spaced strip brushes is arranged below each of the two horizontal transverse carriages, the garbage cleaning head is hung by a hanger rope passing through a pulley assembly, and a winch is arranged to control the winding and unwinding of the hanger rope, the bottom surface of the horizontal transverse carriage is provided with a torsion-resistant plate chain capable of bending upward and downward but not capable of tilting leftward and rightward, and the plate chain is connected to the rear side of the garbage cleaning head to limit the leftward and rightward tilting and torsion of the garbage cleaning head, the bottom surface of the hanger is provided with a double-row roller chain capable of bending upward and downward but not capable of tilting forward and backward, and the double-row roller chain is connected to the front side of the garbage cleaning head to limit the forward and backward tilting of the garbage cleaning head, the outer part of the two garbage cleaning heads is provided with a double-shaft forward and reverse rotation output speed reduction mechanism driven by a rotary drive motor, the two output ends of the double-shaft forward and reverse rotation output speed reduction mechanism are connected to the rotary power input ends of the two garbage cleaning heads through soft shaft connecting rods, so as to drive the strip brushes of the two garbage cleaning heads to rotate in the reverse direction synchronously, the strip brushes of the left garbage cleaning head are clockwise when viewed from top to bottom, the strip brushes of the right garbage cleaning head are 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 the rotation phase, and a garbage conveyor belt conveying from the front lower side to the rear upper side is arranged at the middle line position behind the two garbage cleaning heads, 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, and the garbage cleaning heads are provided with limiting mechanisms to automatically lift the strip brushes when the strip brushes rotate to the front end of the garbage conveyor belt, so as to realize the transition of the strip brushes from brushing the ground to feeding the garbage conveyor belt.

[0007] The front-stage cleaning system of the road sweeper is provided with two garbage cleaning heads capable of lifting and lowering and hung below the middle part of the frame girder through a hanger, an inclined garbage conveyor belt with a low front and a high rear is arranged at the middle line position behind the two garbage cleaning heads, when working, the strip brushes of the two garbage cleaning heads rotating in the reverse direction can continuously sweep the garbage from the sides of the vehicle body to the middle line of the vehicle body and feed the garbage into the front end of the inclined garbage conveyor belt, and then the garbage conveyor belt conveys the garbage to the rear upper side. The garbage cleaning and conveying path of the system is short, the structure is reasonable, the working efficiency is high, the components are simple, and the manufacturing cost can be reduced. In addition, the system drives the two garbage cleaning heads to move leftward or rightward by a small amplitude synchronously through the driving of the horizontal transverse carriage, so that the outer strip brushes of the garbage cleaning heads can move out of the left side or the right side of the vehicle body by a certain distance, and the kerb 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 leftward or rightward, the strip brushes on the adjacent sides of the two garbage cleaning heads can still feed the garbage to the front end of the garbage conveyor belt. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a perspective structural schematic view of the front-stage cleaning system of the road sweeper.

[0009] Figure 2 is a right side view. Figure 1

[0010] Figure 3 is a top plan view. Figure 1

[0011] Figure 4 is a perspective view of a garbage cleaning head suspended by a right side hanger through a transverse moving carriage.

[0012] Figure 5 is a right side view. Figure 4

[0013] Figure 6 is a perspective view of a garbage cleaning head after removing a worm gear reducer of a right side.

[0014] Figure 7 is a top plan view. Figure 6

[0015] Figure 8 is a perspective view of rotating to back facing forward. Figure 6

[0016] Figure 9 is a perspective view of a driving assembly in Figure 8

[0017] Figure 10 is a perspective view of a sweeping assembly in Figure 8

[0018] Figure 11 is a perspective view of a garbage conveyor belt.

[0019] Figure 12 is a right side view. Figure 11

[0020] Figure 13 is a right side view of a front stage cleaning system of the present road sweeper installed behind a frame girder.

[0021] ​​​​​​​In the figure: 1-frame beam, 2-hanging frame, 3-horizontal moving carriage, 4-electric horizontal moving push rod, 5-brush, 6-garbage cleaning head, 7-hanging rope, 8-winch, 9-plate chain, 10-double row roller chain, 11-rotary drive motor, 12-double shaft forward and reverse output speed reduction mechanism, 13-flexible shaft connecting rod, 14-garbage conveying belt, 15-chassis, 16-supporting wheel, 17-main shaft, 18-brush head mounting seat, 19-brush head module, 20-upper top pulley, 21-lower top pulley, 22-upper pull spring, 23-intermediate support frame, 23.1-center cylinder, 23.2-supporting rod, 23.3-supporting disc, 23.4-upper extension screw rod, 23.5-supporting frame, 24-upper and lower limit frame, 24.1-upper limit ring, 24.2-lower limit arc piece, 24.3-upper supporting plate, 25-lifting ring, 25.1-hanging pulley, 25.2-connecting handle, 25.3-fish eye joint bearing, 26-worm and gear speed reducer, 27-buffer spring, 28-pressing gasket, 29-limiting pull spring, 30-lower suspension chain, 31-conveying support, 31.1-castor, 32-roller, 33-conveying belt, 34-conveying drive motor, 35-first speed 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-spiral conveying pipeline, 42-second speed reduction mechanism, 43-height limiting frame. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings. In the description of the utility model, the orientation words of "front", "back", "left", "right", "up", "down" are defined based on the orientation indicated in the drawings Figure 1 、 Figure 4 、 Figure 6 、 Figure 11 , which adopts the visual angle of the driver of the road sweeping vehicle.

[0023] As Figures 1-13As shown, the front-stage cleaning system of the road sweeper is provided with a horizontal transverse hanger 2 fixedly installed on the frame beam 1, two left and right transverse sliding frames 3 are arranged on the hanger 2 and can slide left and right along the hanger 2, the transverse sliding frame 3 is driven by an electric transverse sliding push rod 4, and one vertical garbage cleaning head 6 provided with a plurality of radially spaced strip brushes 5 is arranged below each of the two transverse sliding frames 3, the garbage cleaning head 6 is hung by a hoisting rope 7 passing through a pulley assembly, and a winch 8 is arranged to control the winding and unwinding of the hoisting rope 7, the bottom surface of the transverse sliding frame 3 is provided with a torsion-resistant plate chain 9 which can be bent up and down but cannot be tilted left and right, and the plate chain 9 is connected to the rear side of the garbage cleaning head 6 to limit the left and right tilting and torsion of the garbage cleaning head 6, the bottom surface of the hanger 2 is provided with a double-row roller chain 10 which can be bent up and down but cannot be tilted forward and backward, and the double-row roller chain 10 is connected to the front side of the garbage cleaning head 6 to limit the forward and backward tilting of the garbage cleaning head 6; the outer portions of the two garbage cleaning heads 6 are provided with a double-shaft forward and reverse rotation output reduction mechanism 12 driven by a rotary drive motor 11, and the two output ends of the double-shaft forward and reverse rotation output reduction mechanism 12 are connected to the rotary power input ends of the two garbage cleaning heads 6 through soft shaft connecting rods 13, so as to drive the strip brushes 5 of the two garbage cleaning heads 6 to rotate synchronously and reversely, the strip brushes 5 of the left garbage cleaning head 6 are clockwise from top to bottom, the strip brushes 5 of the right garbage cleaning head 6 are counterclockwise from top to bottom, and the strip brushes 5 of the adjacent sides of the two garbage cleaning heads 6 are partially overlapped and staggered in rotation phase to avoid motion interference; a garbage conveyor belt 14 conveying from front lower side to rear upper side is arranged at the middle line position behind the two garbage cleaning heads 6, the front end of the garbage conveyor belt 14 extends into the overlapping portion of the strip brushes 5 of the adjacent sides of the two garbage cleaning heads 6, and the garbage cleaning heads 6 are provided with a limiting mechanism to automatically lift the strip brushes 5 when they rotate to the front end of the garbage conveyor belt 14, so as to realize the transition of the strip brushes 5 from brushing the ground to feeding the garbage conveyor belt 14.

[0024] The garbage cleaning head 6 is provided with a brushing assembly and a driving assembly; the brushing assembly is provided with a chassis 15, a plurality of support wheels 16 are arranged on the outer periphery of the bottom surface of the chassis 15, a vertical main shaft 17 which can rotate in situ is arranged on the top surface of the chassis 15 through a bearing, a brush head mounting seat 18 which rotates synchronously with the main shaft 17 is sleeved on the middle segment of the main shaft 17, the center of the brush head mounting seat 18 is a core barrel fixedly connected with the main shaft, a plurality of pairs of radially outward extending vertical clamping pieces are welded on the outer circumference of the core barrel, and each pair of clamping pieces of the brush head mounting seat 18 is hinged with a brush head module 19 which extends outward and can be tilted up and down in a clamping groove; the brush head module 19 is provided with an inclined downward 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, a horizontal outward extending strip brush 5 is fixedly installed on the front end of the brush handle, the bristles of the strip brush 5 extend outward and downward, an upper top pulley 20 and a lower top pulley 21 are fixedly connected on the upper side of the front end of the brush handle, and an upper pulling spring 22 is connected between the middle part of the brush handle and the clamping piece, the brush head module 19 is elastically pulled upward by the upper pulling spring 22.

[0025] The driving assembly is provided with an intermediate support frame 23, upper and lower limit frames 24, a lifting ring 25 and a worm gear reducer 26. The central part of the intermediate support frame 23 is provided with a central cylinder 23.1, the inner cylinder of the central cylinder 23.1 is rotatably connected to the upper section of the main shaft 17 of the brushing assembly through a bearing, the outer side of the circumference of the central cylinder 23.1 is fixedly welded with a group of support rods 23.2 which are uniformly distributed along the circumference and extend radially. The upper and lower limit frames 24 are composed of an upper limiting ring 24.1 and a lower limiting arc piece 24.2. The upper limiting ring 24.1 is a horizontally placed circular ring with the front half circle being horizontal and the rear half circle gradually rising. The lower limiting arc piece 24.2 is a horizontally placed 1 / 4 circular arc piece located below the outer periphery of the upper limiting ring 24.1. The lower limiting arc piece 24.2 is located at the rear half of the adjacent sides of the two garbage sweeping heads 6 and gradually rises from front to back. The lower limiting arc piece 24.2 is connected to the upper limiting ring 24.1 as a whole through the connecting rods on the outer side. The upper end surface of the upper limiting ring 24.1 is provided with an upper support plate 24.3 connected to the support rods 23.2 of the intermediate support frame 23. The brush head module 19 of the brushing assembly is pulled by the upper pulling spring 22, the upper top pulley 20 of the brush handle elastically abuts against the lower end surface of the upper limiting ring 24.1. When the brush head module 19 rotates to the rear half of the adjacent sides of the two garbage sweeping heads 6, the lower top pulley 21 of the brush handle abuts against the upper end surface of the lower limiting arc piece 24.2. The intermediate support frame 23 is fixedly connected with a support disc 23.3 which extends radially outward from the outer side of the circumference of the central cylinder 23.1 at the top surface of the support rods 23.2. The top surface of the support disc 23.3 is fixedly connected with upper extension screws 23.4 on the front and rear sides thereof. The top surface of the support disc 23.4 is further welded with a group of support frames 23.5 which extend upward. The top ends of the support frames 23.5 are provided with the worm gear reducer 26 through the fixedly welded bottom plate. The input end of the worm gear reducer 26 is connected with the soft shaft connecting rod 13. The output end of the worm gear reducer 26 is fixedly connected with the upper end of the main shaft 17 of the brushing assembly. The main shaft 17 is driven by the worm gear reducer 26 to rotate in situ. The lifting ring 25 is a horizontally thick-walled circular ring arranged above the support disc 23.3 of the intermediate support frame 23. The left and right sides of the lifting ring 25 are welded with lifting pulleys 25.1 through which the hanging ropes 7 pass. The rear side and the front side of the lifting ring 25 are provided with connecting handles 25.2 connected with the plate chain 9 and the double-row roller chain 10 respectively. The inner circumference of the lifting ring 25 is provided with fish-eye joint bearings 25.3 on the front and rear sides through fixed support plates. The lifting ring 25 is movably sleeved on the two upper extension screws 23.4 of the support disc 23.3 through the two fish-eye joint bearings 25.3. The upper and lower ends of the upper extension screws 23.4 corresponding to the fish-eye joint bearings 25.3 are sleeved with buffer springs 27 and are provided with top pressing pads 28 to press the buffer springs 27. A plurality of groups of limiting tension springs 29 are hung in the circumference of the lifting ring 25. The ends of the limiting tension springs 29 are connected to the top surface of the support disc 23.3 and the support frames 23.5 on the top surface of the support disc 23.3 respectively to limit the support disc 23.3The horizontal deviation below the lifting ring 25, the lower side of the lifting ring 25 is connected with a group of evenly distributed lower hanging chains 30 along the circular ring, the end of each lower hanging chain 30 is connected to the corresponding hanging ear on the top surface of the support disc 23.3, and the lower hanging chain 30 is kept in a relaxed state.

[0026] Further, the support wheel 16 on the bottom surface of the bottom disc 15 includes a directional wheel and a plurality of universal wheels.

[0027] Further, the upper support plate of the upper limiting ring 24.3 is provided with a plurality of groups of connecting hole positions with different heights, and the installation height of the upper and lower limiting frames 24 is adjusted by selecting the connecting hole positions with different heights and connecting them with the support rod 23.2 of the middle support frame 23.

[0028] The garbage conveying belt 14 is provided with a conveying support 31 which is inclined and arranged in a front-low and rear-high manner, a group of horizontal transverse rollers 32 are arranged in the conveying support 31 to support a front-low and rear-high wide surface conveying belt 33, the last roller 32 is supported on the fixed support under the frame girder 1 through a bearing, and the last roller 32 is driven to rotate by the transmission driving motor 34 through the first speed reduction mechanism 35, so that the surface on the conveying belt 33 is conveyed from the front and lower direction to the rear and upper direction; the conveying support 31 is further provided with a pair of front and lower extending casters 31.1 which are arranged on the both sides of the front part of the conveying support 31 and are used for ground supporting and have adjustable installation height, the front part of the conveying support 31 is provided with a feed guide plate 36 which is arranged above the front end of the conveying belt 33 and can slide and stretch forward and downward, the feed guide plate 36 is supported by a longitudinal sliding frame 37 which can slide longitudinally along the conveying support 31 and is driven by an electric telescopic push rod 38; the frame girder 1 is further provided with a pair of electric lifting rods 39 which are arranged on the left and right sides of the middle part of the conveying support 31, the end of the electric lifting rod 39 is connected with the middle part of the conveying support 31 through a hanging chain, and the garbage conveying belt 14 is lifted or lowered around the last roller 32 by the electric lifting rod 39; when the garbage conveying belt 14 is lowered, the front end of the feed guide plate 36 extends into the overlapping position of the adjacent side brushes 5 of the two garbage cleaning heads 6, and the front end of the conveying belt 33 is fed by the adjacent side brushes 5 of the two garbage cleaning heads 6 through the feed guide plate 36.

[0029] Further, a receiving hopper 40 is arranged below the rear end of the garbage conveying belt 14, a rear-stage conveying spiral conveying pipeline 41 is connected with the side of the bottom of the receiving hopper 40, and the spiral conveying blade of the spiral conveying pipeline 41 extends into the receiving hopper 40 and is driven by the transmission driving motor 34 through the second speed reduction mechanism 42.

[0030] Further, the longitudinal moving slide 37 is provided with a height limiting frame 43 for limiting the size of the garbage, which is arranged behind the feeding guide plate 36 and above the conveying belt 33 by 8-15 cm. The height limiting frame 43 is provided with an inclined blocking rod at the front side thereof. When the conveying belt 33 continuously conveys backward, the inclined blocking rod can guide the large garbage which cannot pass through the height limiting frame 43 to slide out from the side of the conveying belt 33, so as to avoid the large garbage to be accumulated in front of the height limiting frame 43 and cause blockage.

[0031] Further, the front end of the feeding guide plate 36 is provided with a wear-resistant rubber plate 36.1 as the end head, and the front side of the wear-resistant rubber plate 36.1 is further provided with a roller 36.2 which is used for ground supporting and has adjustable installation height.

[0032] Further, the vehicle frame girder 1 is provided with a dust suction cover (not shown in the drawings) above the adjacent sides of the two garbage cleaning heads 6 and above the rear end of the garbage conveying belt 14. The dust suction hole is arranged at the side of the top surface of the dust suction cover, and the dust suction hole is connected with the road sweeping vehicle frame through a dust suction pipeline and a dust lifting processor, so that the dust lifted by the garbage sweeping and conveying can be sucked to the dust lifting processor for treatment, thereby avoiding the dust to be diffused outward.

[0033] When the front-stage sweeping system of the road sweeping vehicle works, the electric transverse moving push rod 4 is controlled to drive the transverse moving slide 3, so that the two garbage cleaning heads 6 are moved to the appropriate positions below the vehicle frame girder 1. Then, the winch 8 is controlled to lower the two garbage cleaning heads 6 to the ground through the supporting wheels 16 at the bottom. Then, the electric pull rod 39 is controlled to lower the garbage conveying belt 14 so that the front end of the garbage conveying belt 14 is in contact with the ground. Then, the electric telescopic push rod 38 is controlled to drive the front end of the feeding guide plate 36 to extend forward and downward to the position of the overlapping part of the adjacent side strip brushes 5 of the two garbage cleaning heads 6. Then, the rotating drive motor 11 is started to drive the strip brushes 5 of the two garbage cleaning heads 6 to rotate reversely synchronously. Then, the conveying drive motor 34 is started to drive the garbage conveying belt 14 to convey from the front and downward to the rear and upward. The reversely rotating strip brushes 5 of the two garbage cleaning heads 6 can continuously sweep the garbage from the side of the vehicle bottom to the center line of the vehicle bottom. Under the guidance and limiting of the upper and lower limiting frames 24, the adjacent side strip brushes 5 are automatically lifted when rotating through the feeding guide plate 36 of the garbage conveying belt 14, so as to realize the transition of the strip brushes 5 from brushing the ground to feeding the garbage to the garbage conveying belt 14. After the swept garbage is fed into the garbage conveying belt 14, the garbage is conveyed to the rear and upward by the garbage conveying belt 14 and automatically falls into the receiving hopper 40. Then, the garbage in the receiving hopper 40 is conveyed to the garbage bin above the vehicle frame girder 1 through the spiral conveying pipeline 41.

[0034] In addition, since the lifting ring 25 of the garbage cleaning head 6 is connected with the intermediate support frame 23 through the fish eye joint bearing 25.3, and is provided with the buffer spring 27 and the limiting tension spring 29, the garbage cleaning head can be adaptively slightly deflected and lifted according to the road conditions during the working process, and can easily cope with various rough road conditions, and when a large depression appears on the road, the garbage cleaning head 6 can be hung by the lower suspension chain 30, so that the garbage cleaning head 6 is prevented from falling into the depression and being damaged.

[0035] The above description is only a typical embodiment of the present application, and is not used to limit the present application, and any modification or equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A front-stage cleaning system of a road sweeper, characterized by: The front-stage cleaning system is provided with a horizontal transverse hanger fixedly installed on the frame girder, two left and right transverse carriages capable of sliding along the hanger are arranged on the hanger, the transverse carriages are driven by electric transverse push rods, a vertical garbage cleaning head provided with a plurality of radially spaced strip brushes is arranged below each of the two transverse carriages, the transverse carriages are hung on the garbage cleaning head through a lifting rope wound on a pulley assembly and are provided with a winch for controlling the winding and unwinding of the lifting rope, the bottom surface of the transverse carriage is provided with a torsion-resistant plate chain capable of bending up and down but not capable of tilting left and right, which is connected to the rear side of the garbage cleaning head to limit the left and right tilting and torsion of the garbage cleaning head, the bottom surface of the hanger is provided with a double-row roller chain capable of bending up and down but not capable of tilting forward and backward, which is connected to the front side of the garbage cleaning head to limit the forward and backward tilting of the garbage cleaning head; the outer part of the two garbage cleaning heads is provided with a double-shaft forward and reverse rotation output speed reduction mechanism driven by a rotary drive motor, the two output ends of the double-shaft forward and reverse rotation output speed reduction mechanism are connected to the rotary power input ends of the two garbage cleaning heads through soft shaft connecting rods, so as to drive the strip brushes of the two garbage cleaning heads to rotate in the reverse direction synchronously, the strip brushes of the left garbage cleaning head are clockwise from top to bottom, the strip brushes of the right garbage cleaning head are counterclockwise from top to bottom, and the strip brushes on the adjacent sides of the two garbage cleaning heads are partially overlapped and staggered in the rotation phase; a garbage conveyor belt is arranged at the middle line position behind the two garbage cleaning heads and is arranged from the front lower side to the rear upper side, 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, and the two garbage cleaning heads are provided with a limiting mechanism to automatically lift the strip brushes when the strip brushes rotate to the front end of the garbage conveyor belt, so as to realize the transition of the strip brushes from brushing the ground to feeding the garbage conveyor belt.

2. The front-stage cleaning system of a road cleaning vehicle according to claim 1, characterized in that: The garbage cleaning head is provided with a brushing assembly and a driving assembly; the brushing assembly is provided with a bottom plate, a plurality of support wheels are arranged on the periphery of the bottom surface of the bottom plate, a vertical main shaft capable of rotating in situ is arranged on the central top surface of the bottom plate through a bearing, a brush head mounting seat capable of rotating synchronously with the main shaft is sleeved on the middle section of the main shaft, a core barrel fixedly connected with the main shaft is arranged at the center of the brush head mounting seat, a plurality of pairs of radially outward extending vertical clamping pieces are welded on the outer circumference of the core barrel, and a brush head module outward extending and capable of upward and downward deflection is hinged in the clamping groove of each pair of clamping pieces; the brush head module is provided with an inclined downward 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, a horizontal outward extending strip brush is fixedly installed at the front end of the brush handle, the bristles of the strip brush are inclined outward downward, an upper top pulley and a lower top pulley are fixedly connected on the upper side of the front end of the brush handle, and an upward pulling spring is connected between the middle part of the brush handle and the clamping piece for elastically pulling the brush head module upward; The driving assembly is provided with an intermediate support frame, upper and lower limit frames, a lifting ring and a worm gear reducer; the central part of the intermediate support frame is provided with a central cylinder, the inner cylinder of the central cylinder is rotatably connected to the upper section of the main shaft of the brushing assembly through a bearing, the outer side of the central cylinder is fixedly welded with a group of support rods which are uniformly distributed along the circumference and extend radially; 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 ring with the front half circle being horizontal and the rear half circle gradually rising, the lower limit arc piece is a flat 1 / 4 circular arc piece located below the periphery of the upper limit ring, the lower limit arc piece is located at the rear half of the adjacent side 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 into an integral whole through the connecting rods on the outer side, the upper end surface of the upper limit ring is provided with an upper support plate connected with the support rods of the intermediate support frame, the brush handle of the brush module is elastically abutted on the lower end surface of the upper limit ring under the pulling of the upper pulling spring, when the brush module rotates to the rear half of the adjacent side of the two garbage cleaning heads, the lower top pulley of the brush handle is abutted on the upper end surface of the lower limit arc piece; the intermediate support frame is fixedly connected with a support disc which radially extends outward from the outer circumference of the central cylinder at the top surface of the support rods, the support disc top surface is fixedly connected with upper extension screws on the front and rear sides thereof, the support disc top surface is also welded with a group of support frames which are upwardly supported, the top end of the support frame is provided with the worm gear reducer through the fixedly welded bottom plate, the input end of the worm gear reducer is connected with the soft shaft connecting rod, the output end of the worm gear reducer is fixedly connected with the upper end of the main shaft of the brushing assembly, the main shaft is driven by the worm gear reducer to rotate in situ; The lifting ring is a horizontal thick-walled ring arranged above the support disc of the intermediate support frame, the left and right sides of the lifting ring are welded with lifting pulleys for the hoisting rope to pass around, the front and rear sides of the lifting ring are provided with connecting handles connected with the plate chain and the double-row roller chain respectively, the inner circumference of the lifting ring is provided with fish-eye joint bearings on the front and rear sides thereof through fixed support plates, the lifting ring is movably sleeved on the two upper extension screws of the support disc through the two fish-eye joint bearings, the upper and lower ends of the upper extension screws corresponding to the fish-eye joint bearings are sleeved with buffer springs and provided with top pressing pads to press the buffer springs, a plurality of groups of limiting tension springs are hung in the circumference of the lifting ring, the ends of the limiting tension springs are connected to the top surface of the support disc and the support frames on the top surface of the support disc respectively to limit the horizontal deviation of the support disc below the lifting ring, the lower side of the lifting ring is connected with a group of lower hanging chains which are uniformly distributed along the circular ring, the ends of the lower hanging chains are connected to the corresponding hanging ears on the top surface of the support disc respectively, and the lower hanging chains are in a relaxed state.

3. The front-stage cleaning system of a road cleaning vehicle according to claim 2, characterized in that: The support wheels on the bottom surface of the bottom disc include a directional wheel and a plurality of universal wheels.

4. The front-stage cleaning system of a road cleaning vehicle according to claim 2, characterized in that: The upper support plate of the upper limit ring is provided with a plurality of groups of connecting holes with different heights, the installation height of the upper and lower limit frames is adjusted by selecting the connecting holes with different heights to be connected with the support rods of the intermediate support frame.

5. The front-stage cleaning system of a road cleaning vehicle according to claim 1, characterized in that: The garbage conveying belt is provided with a conveying support which is inclinedly arranged from low front to high back, a group of horizontal transverse rollers support a circle of wide front-low-back-high rough surface conveying belt in the conveying support, the last rollers are supported by a fixed support under the frame girder through bearings, the last rollers are driven to rotate by a transmission driving motor through a first speed reduction mechanism, so that the belt surface realizes conveying from low front to high back; two sides of the front part of the conveying support are also respectively provided with a front-downwardly extending ground-touching support wheel with adjustable installation height, the front part of the conveying support is provided with a forwardly and downwardly sliding telescopic feeding guide plate above the front end of the conveying belt, the feeding guide plate is supported by a longitudinal sliding carriage which can slide along the conveying support and is driven by an electric telescopic push rod; the frame girder is also provided with an electric lifting rod on the left and right sides of the middle part of the conveying support, the end of the electric lifting rod is connected with the middle part of the conveying support through a hanging chain, and the garbage conveying belt is lifted or lowered around the last rollers by the electric lifting rod; when the garbage conveying belt is lowered, the front end of the feeding guide plate extends into the overlapping position of the adjacent side brushes of the two garbage sweeping heads, and the front end of the conveying belt is fed by the adjacent side brushes of the two garbage sweeping heads through the feeding guide plate.

6. The front-stage cleaning system of a road cleaning vehicle according to claim 5, characterized in that: A receiving hopper is arranged below the rear end of the garbage conveying belt, a rear-stage conveying spiral conveying pipeline is connected to the side of the bottom of the receiving hopper, and the spiral conveying blades of the spiral conveying pipeline extend into the receiving hopper and are driven by a transmission driving motor through a second speed reduction mechanism.

7. The front-stage cleaning system of a road cleaning vehicle according to claim 5, characterized in that: The longitudinal sliding carriage is provided with a height limiting frame for limiting the size of garbage at a position 8-15 cm above the conveying belt behind the feeding guide plate, and the height limiting frame is provided with an inclined blocking rod on the front side thereof.

8. The front-stage cleaning system of the road cleaning vehicle according to claim 5, characterized in that: The front end of the feeding guide plate is provided with a wear-resistant rubber plate as an end head, and the left and right sides of the front edge of the wear-resistant rubber plate are also provided with ground-touching support wheels with adjustable installation height.

9. The front-stage cleaning system of a road cleaning vehicle according to claim 1, characterized in that: The frame girder is provided with dust suction hoods above the adjacent sides of the two garbage sweeping heads and above the rear end of the garbage conveying belt, respectively, dust suction holes are formed in the side of the top surface of the dust suction hood, and the dust suction holes are connected with a dust raising processor above the frame of the road sweeping vehicle through a dust suction pipeline.

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