CN109540566B

CN109540566B - Road sweeper cleaning performance test bed and test method

Info

Publication number: CN109540566B
Application number: CN201910014846.3A
Authority: CN
Inventors: 王晓燕; 齐志强; 崔华胜; 周飞; 胡昌夏; 冯伟; 乔岳
Original assignee: Beijing City Management Research Institute
Current assignee: Beijing City Management Research Institute
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2023-10-24
Anticipated expiration: 2039-01-08
Also published as: CN109540566A

Abstract

The road sweeper cleaning performance test bed comprises a test pavement, a sampling module, a local drying module, a water knife assembly, an air knife assembly, a distributor, a cleaning and sampling platform system, a soil material scattering system and a side driving device; and a side driving device is arranged on one side of the test pavement along the length direction X of the pavement, and is respectively hinged with and drives the cleaning and sampling platform system and the soil material scattering system to reciprocate along the X direction on the test pavement through a driving block assembly. The test method comprises the following steps: zeroing, road surface cleaning, cloth material, first sampling, road sweeper operation, second sampling, twice sampling sample data analysis and detection result making. The invention can solve the technical problems that in the detection of the existing road sweeper cleaning performance evaluation technology, the use of multiple manual operation devices and devices is scattered, time and labor are wasted, cloth is easy to occur, the collection is uneven, unified control cannot be coordinated, and the data is inaccurate.

Description

Road sweeper cleaning performance test bed and test method

Technical Field

The invention relates to the field of environmental sanitation engineering, in particular to a road sweeper cleaning performance test bed and a test method.

Background

The road sweeper cleaning performance evaluation parameters include cleaning (suction) rate, operation capability, dust emission of operation environment, operation noise and the like. The domestic current detection method comprises the following steps: asphalt roads built in the open-air field are used as test roads; before detection, a driver is used for driving a distributing machine to distribute dust with certain quality and certain particle size on a test road; selecting a plurality of areas on a test road, wherein the width of each area is the cleaning width of a road sweeper, and respectively collecting road dust in the areas by a manual dust collector and respectively weighing the quality of the dust; after the tested vehicle operates at a specified operation speed, the manual operation dust collector is used for collecting road dust in five areas and respectively weighing the quality of the dust; the mass of the twice collected dust is used for calculating the sweeping (sucking) rate of the road sweeper.

Therefore, it is needed to solve the problems of complicated system work such as cloth and collection in cleaning performance detection by manually operating various vehicle mechanical devices during the test process, and the problems of travel and installation requirements of different functional device components in the cleaning performance test stand of the road sweeper so as to achieve a synergistic effect.

Disclosure of Invention

The invention provides a road sweeper cleaning performance test bed and a test method, which are used for solving the technical problems that in the detection of the conventional road sweeper cleaning performance evaluation technology, multiple manual operation devices and devices are scattered in use, time and labor are wasted, cloth is easy to occur, uniform control cannot be coordinated due to uneven collection, and data are inaccurate.

The invention adopts the following technical scheme:

the road sweeper cleaning performance test bed comprises a test pavement, a sampling module, a local drying module, a water knife assembly, an air knife assembly, a distributor, a cleaning and sampling platform system, a soil material scattering system and a side driving device;

a side driving device is arranged on one side of the test pavement along the length direction X of the pavement, and is respectively hinged with and drives a cleaning and sampling platform system and a soil material scattering system to reciprocate on the test pavement along the X direction through a driving block assembly; the cleaning and sampling platform system and the soil material scattering system are distributed along the width direction of the test pavement;

the cleaning and sampling platform system comprises the sampling module, the local drying module, the water knife assembly and the air knife assembly, and the sampling module reciprocates along the width direction Y of the test pavement in the cleaning and sampling platform system;

the soil material scattering system comprises the material distributor, and the material distributor reciprocates along the width direction Y of the test pavement in the soil material scattering system.

The side driving device comprises a side driving frame, a driving block, an organ cover component and a drag chain component,

The side driving frame comprises a supporting frame, racks and guide rails, wherein the supporting frame is longitudinally fixed on the ground along one side of a road surface, teeth of the racks face upwards and are longitudinally fixed on the surface of the supporting frame along the supporting frame, and the guide rails are longitudinally arranged in parallel along the supporting frame and are fixed on the surface of the supporting frame; the rack is positioned between the two guide rails;

the driving block comprises a driving block assembly, a side sliding block and a sliding block mounting plate, the driving block assembly comprises a driving motor, a speed reducer and gears, the side sliding block is arranged on the outer side of the vertically arranged sliding block mounting plate and is connected with the guide rails in a sliding fit manner corresponding to the two guide rails, the gears at the tail ends of gear shafts penetrating through holes of the sliding block mounting plate are meshed with the racks, and the other ends of the gear shafts are driven by the driving shafts of the speed reducer of the driving motor; the driving motor and the speed reducer shell are fixed on the sliding block mounting plate;

the sliding block mounting device is characterized in that a horizontal sliding block mounting bearing seat is fixed on the inner side of the sliding block mounting plate, a bearing is embedded in the sliding block mounting bearing seat, an optical axis which is tightly matched with the inner wall of the bearing is arranged in the bearing, the other end of the optical axis is embedded into an inner hole of an optical axis fixing seat in a tightly matched manner, and the optical axis fixing seat is fixed on the side face of the connecting frame.

The cleaning and sampling platform system further comprises a supporting frame structure at the bottom, wherein the supporting frame structure comprises a grid framework arranged at the front section along the X direction of the walking direction and a track framework arranged at the rear section along the Y direction; the grid framework is provided with the water knife assembly and the air knife assembly; the track framework is provided with two tracks and a first rack which are parallel to each other along the Y direction, and the first rack is arranged between the two tracks;

the sampling module Y-direction moving device comprises a sampling module support, the sampling module is fixed on the sampling module support, and the bottom surface of the sampling module support is hinged with a sampling sliding block which is connected with the track in a sliding fit manner; the sampling module support is provided with the driving block assembly, and a gear of the driving block assembly is meshed with the rack to drive the sampling module support to move along the Y direction on the track; the sampling driving block assembly is fixed on the sampling module platform bracket through a connecting plate; the gear vertically extends out of the bottom of the sampling module bracket;

a local drying module is arranged on the back side of the track on the supporting frame structure, and is hinged with the supporting frame structure and controlled to be vertical or parallel to a road surface by a start-stop switch;

One end of the grid framework is fixed with a traction connecting frame extending along the Y direction; the bottom surface of the supporting frame structure is provided with a driving wheel.

The soil material scattering system comprises a material distributing frame, a material distributing machine and a material distributing machine driving device, wherein the material distributing frame is of a supporting frame structure, the supporting frame comprises a main body supporting frame which is transversely arranged and an auxiliary supporting frame which is arranged on the front side surface of the main body supporting frame, the material distributing machine is arranged on the main body supporting frame, one end of the main body supporting frame is transversely provided with a traction connecting frame, the traction connecting frame is of a frame structure, and the auxiliary supporting frame is provided with the material distributing machine driving device which drives the material distributing machine to transversely move;

the cloth rack is supported on the ground through a driving wheel and a guide wheel which are arranged at the bottom of the cloth rack;

the upper surface of the main body supporting frame is transversely provided with two parallel guide rails II, the material distributor is arranged between the guide rails II, the material distributor is provided with a sliding block which is in sliding fit with the guide rails II, and four corners of the material distributor are hinged with the sliding blocks; the two sliding blocks on the second guide rail on one side are fixedly connected through a sliding block connecting plate, and the distributing machine driving device drives the sliding block connecting plate to drive the distributing machine to transversely reciprocate through connection;

The distributor driving device comprises a screw rod driving motor, a screw rod nut, a sliding table and a connecting piece; the screw rod sequentially penetrates through bearing inner supports on two bearing seats fixed on the auxiliary supporting frame, screw nuts are sleeved on the screw rod in a screw transmission mode, the sliding table is horizontally fixed on the screw nuts, the upper surface of the sliding table is provided with a connecting piece, one end of the connecting piece is fixedly connected with the sliding table, the other end of the connecting piece is hinged to the middle position of the sliding block connecting plate after extending longitudinally, a screw rod driving motor is connected and driven to drive the screw rod to drive the screw nuts to transversely and spirally drive the screw nuts, and the screw nuts drive the sliding block connecting plate to transversely reciprocate through the connection of the sliding table and the connecting piece.

The traction braking anti-collision system is arranged on the test pavement and comprises a traction device and an anti-collision system which are arranged at the end point of the test pavement and a braking device which is arranged at the starting point of the test pavement; the anti-collision system is provided with an anti-collision guardrail in front of the traction device;

the traction device comprises a variable frequency motor, a first coupler, a first speed reducer, a second coupler, a first bearing seat, a first roller, a first steel wire rope and a hook, wherein the hook is connected with the front part of the detected road sweeper and drives the detected road sweeper to move forwards;

The braking device comprises a rotary motor, a third coupling, a switching shaft, a bidirectional overrunning clutch, a second roller, a second steel wire rope, a second bearing seat, an electromagnetic clutch, a magnetic powder brake and a hook; the hook is fixedly connected with the tail of the road sweeper;

the variable frequency motor of the traction device drives the first speed reducer and the first roller to rotate, the first roller drives the first steel wire rope wound on the roller surface of the first roller to do rewinding movement, and the free end of the first steel wire rope is fixedly connected with the hook to traction the front part of the road sweeper and drive the detected road sweeper to move forwards;

the rotary motor is connected with and drives one end of a central shaft of the roller II through the coupler III, the switching shaft and the bidirectional overrunning clutch to drive the roller II to synchronously and bidirectionally rotate, the other end of the central shaft of the roller II is sequentially connected with the electromagnetic clutch and the magnetic powder brake, two ends of the central shaft of the roller II respectively penetrate through a second through hole of the bearing seat and are supported by bearings arranged on the through holes, and the magnetic powder brake brakes the roller II to rotate in a sliding motion mode of the electromagnetic clutch through attraction to stop the road sweeper.

Travel switches are arranged at the limit positions of the two ends of the supporting frame, and the slide block mounting plates of the side driving devices touch the travel switches to control the cleaning and sampling platform system and the soil material scattering system to stop moving.

The driving wheel is driven by a driving wheel motor, and the driving wheel motor is arranged on the supporting frame; the speed of the driving wheel and the driving block of the side driving device in the X direction in linear motion is the same; and angle sensors are arranged on the cleaning and sampling platform system and the soil material scattering system to detect the included angles between the cleaning and sampling platform system and the soil material scattering system and the X direction to control the speed along the X direction linear motion.

The test method of the road sweeper cleaning performance test bed comprises the following steps:

1) Zeroing: before the test starts, the cleaning and sampling platform system and the soil material scattering system are respectively arranged at one side of the test pavement and are set to be at a zeroing position;

2) Cleaning a road surface: the cleaning and sampling platform system is moved to a test pavement through a driving wheel of the cleaning and sampling platform system; the cleaning and sampling platform system is driven by a side driving device to reciprocate along the X direction, a water knife assembly and an air knife assembly on the cleaning and sampling platform system start to work, a test pavement is cleaned and purged until the cleaned test pavement meets the material distribution condition, and then the cleaning and sampling platform system returns to a zero-returning position;

3) Cloth: the soil material scattering system is moved to a test pavement through a driving wheel of the soil material scattering system; the material distributor is driven by a side driving device to distribute materials along the X direction on a half of the test pavement, after the material distributor is completed, the material distributor moves to the other half of the test pavement along the Y direction, the material distributor distributes the materials along the X direction again, and after the material distribution is completed, the material distributor returns to the zero-returning position;

4) Sampling for the first time: the cleaning sampling platform system is characterized in that the side edge is swung out, the local drying module starts to work after being driven by the side edge driving device to move to a designated position along the X direction, the designated area is locally dried, then under the action of the sampling module Y direction moving device, the sampling module moves to the dried designated sampling point area, the sampling is respectively weighed after the sampling is finished, the cloth uniformity is detected, and after the single sampling point is finished, the sampling frame on the sampling module moves to the curb side, so that a sampling sample is conveniently taken out; after sampling of all sampling points is completed, the cleaning sampling platform system returns to a zero return position;

5) Road sweeper operation: the detected road sweeper is reversely driven into the road surface along the side of the curb, and the direction of the head of the detected road sweeper is adjusted to be consistent with the X direction of the test road surface; hanging a first traction steel wire rope above the test pavement on a hook of a detected road sweeper head, hanging a second brake steel wire rope on a hook of a tail of the detected road sweeper, starting the traction device to enable the detected road sweeper to accelerate at a specified speed, pass through the test pavement, and simultaneously carry out road sweeping operation, and starting the brake device after the detected road sweeper finishes operation and passes through the test pavement, so that the detected road sweeper decelerates until stopping; taking down the first traction steel wire rope and the first brake steel wire rope, returning, and driving the detected road sweeper away from the test pavement; the front side of the traction device is provided with an anti-collision guardrail for protecting the road sweeper, the traction mechanism and other facilities to be detected;

6) Second sampling: the cleaning sampling platform system swings out of a zeroing position, the local drying module starts to work after moving to a specified position along the X direction through the side driving device, local drying is carried out on a specified area, then under the action of the sampling module Y direction moving device, the sampling module moves to a specified sampling point area, weighing is carried out after sampling is finished, cloth uniformity detection is carried out, and a sampling frame moves to the side of a curb after a single sampling point is finished, so that a sampling sample is conveniently taken out; after sampling of all sampling points is completed, the cleaning sampling platform system returns to a zero return position;

7) The twice sampled sample data is analyzed and a detection result is made.

And travel switches are arranged at the limit positions at the two ends of the support frame of the side driving device, when the cleaning and sampling platform system or the soil material scattering system runs to the limit positions at the two ends, the slide block mounting plate of the side driving device touches the travel switches, so that the cleaning and sampling platform system or the soil material scattering system stops moving and is positioned at the limit block, and then the cleaning and sampling platform system or the soil material scattering system rotates for 90 degrees to retract.

The invention has the following positive and beneficial effects: the road sweeper cleaning performance test bed comprises a cleaning and sampling platform system, a soil material scattering system, a test road surface, a side driving device and a traction braking anti-collision system, and can realize the functions of cleaning the road surface, air drying the road surface, local drying in a sampling area, sampling, traction, braking, and the like of the tested road sweeper to be integrated, unified and coordinated operation and centralized control.

According to the invention, cleaning, sampling and distribution are all automatically controlled, so that uneven and complicated phenomena of multiple manual operations and multiple devices are avoided, time and labor are saved, the standard is unified, and the detection precision is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of a sweeper cleaning performance test bed of the present invention;

FIG. 2 is a schematic diagram of a system for cleaning a sampling platform according to the present invention;

FIG. 3 is a schematic view showing the construction of the soil spreading system according to the present invention;

FIG. 4 is a schematic diagram of a side drive apparatus according to the present invention;

FIG. 5 is a schematic diagram of a connection structure between a side drive device and a distribution platform system according to the present invention;

FIG. 6 is an enlarged partial view of the A position of FIG. 5;

FIG. 7 is a left side view of FIG. 5;

FIG. 8 is an enlarged view of a portion of the B position of FIG. 7;

FIG. 9 is a schematic diagram of the connection structure of the drive block and the side drive frame;

FIG. 10 is a schematic view of the hinge structure of the side drive device and soil material distribution system, cleaning and sampling platform system of the present invention;

FIG. 11 is a schematic structural view of a support frame structure;

FIG. 12 is a schematic structural view of a sampling module holder;

FIG. 13 is a schematic view of the hinge assembly of the present invention;

FIG. 14 is a left side view of the hinge assembly of the present invention;

fig. 15 is a schematic structural view of a partial drying module;

FIG. 16 is a schematic diagram of a Y-direction mobile device of the sampling module of the present invention;

FIG. 17 is a schematic diagram of a drive block assembly of the present invention;

FIG. 18 is a schematic view of the hinge structure of the connecting frame and the side driving device of the present invention;

FIG. 19 is a schematic view of a structure of a spreader;

FIG. 20 is a schematic perspective view of a cloth rack according to the present invention;

FIG. 21 is a schematic top view of the cloth machine of the present invention;

FIG. 22 is a schematic top view of a spreader and guide rail of the present invention;

FIG. 23 is a schematic view of the drive mechanism of the spreader of the present invention;

FIG. 24 is a schematic diagram of the driving and driven axes of the inventive spreader;

FIG. 25 is a schematic view of the hinge assembly mounting location of the spreader of the present invention;

FIG. 26 is a schematic perspective view of a hinge assembly of the spreader of the present invention;

FIG. 27 is a schematic illustration of the drive relationship of the spreader of the present invention;

FIG. 28 is a schematic view of the drive components of the spreader of the present invention;

FIG. 29 is a schematic side view of the cloth machine of the present invention;

FIG. 30 is a schematic perspective view of an adjusting plate of the distributor of the present invention;

FIG. 31 is a schematic diagram of the connection between a spreader and a spreader drive according to the present invention;

FIG. 32 is a schematic diagram of a tested sweeper test structure according to the present invention;

FIG. 33 is a schematic view of the traction device, brake device, and bump guard structure of the present invention;

FIG. 34 is a schematic view of a brake device according to the present invention;

FIG. 35 is a schematic view of a traction device according to the present invention;

FIG. 36 is a second schematic structural view of the brake device of the present invention;

FIG. 37 is a second schematic diagram of a traction device according to the present invention;

fig. 38 to 43 are schematic views showing the operation states of steps 1 to 6 in the test method of the sweeper cleaning performance test stand.

Figure number:

2-soil spreading system, 21-spreading rack, 22-spreader, 23-main body support frame, 24-auxiliary support frame, 26-driving wheel, 27-guiding wheel, 28-second guide rail, 29-slider, 210-second hinge assembly, 211-slider connecting plate, 212-vibrating block motor, 213-driving stick motor, 214-feeding mesh belt, 215-driving glue shaft, 216-driven glue shaft, 217-vibrating block shaft, 218-housing, 219-hopper, 220-lead screw driving motor, 221-lead screw, 222-lead screw nut, 223-sliding table, 224-bearing seat, 225-organ cover, 226-spreader driving device, 227-drag chain, 228-rectangular frame, 229-vibrating block, 230-adjusting plate, 232-connecting piece 2102-hinge seat, 2101-second swing plate, second mounting plate, 2103-second hinge support, 2104-second pin shaft,

3-the test pavement surface was subjected to a 3-test,

4-traction braking anti-collision system, 42-bracket II, 43-bracket I, 44-test carriage, 45-anti-collision railing, 46-variable frequency motor, 47-coupling I, 48-speed reducer I, 49-coupling II, 410-bearing seat I, 411-roller I, 412-wire rope I, 413-hook, 414-input shaft, 415-output shaft, 416-tire, 417-rotary motor, 418-coupling III, 419-switching shaft, 420-bidirectional overrun clutch, 421-roller II, 422-wire rope II, 423-bearing seat II, 424-electromagnetic clutch, 425-magnetic powder brake, 426-anchor bolt, 427-axial locating piece,

5-side drive, 51-side drive rack, 511-support rack, 512-rack, 513-guide rail, 52-drive block assembly, 521-drive motor, 522-decelerator, 523-gear, 524-side slide, 525-slide mounting plate, 526-coupling, 529-gear shaft, 53-organ cover assembly, 54-drag chain assembly, 57-slide mounting bearing housing, 571-bearing, 572-optical axis, 573-optical axis fixing base,

6-supporting frame structure, 61-grid framework, 612-rack one, 62-track framework, 621-track,

7-sampling module support, 71-hinge assembly, 711-swing plate, 712-mounting plate, 713-hinge support, 714-pin, 715-sampling slide,

8-cleaning and sampling platform system, 81-high pressure plunger pump, 82-motor, 83-fan, 84-water knife assembly, 85-air knife assembly, 851-air knife, 86-jet pipe assembly, 861-nozzle, 87-local drying module, 88-sampling module, 89-air compressor and air storage tank,

9-connecting plates and 90-connecting frames.

Detailed Description

The following describes the embodiments of the present invention further with reference to the drawings.

The following examples are given for the purpose of illustration only and are not intended to limit the embodiments of the invention. Various other changes and modifications may be made by one of ordinary skill in the art in light of the following description, and such obvious changes and modifications are contemplated as falling within the spirit of the present invention.

Referring to fig. 1-3, the road sweeper cleaning performance test bed comprises a test pavement 3, a sampling module 88, a local drying module 87, a water knife assembly 84, an air knife assembly 85, a spreader 22, a cleaning sampling platform system 8, a soil material spreading system 2, a side driving device 5 and a traction braking anti-collision system 4;

referring to fig. 4, a side driving device 5 is arranged on one side of the test pavement 3 along the length direction of the pavement in short for the X direction, and the side driving device 5 is respectively hinged with and drives a cleaning and sampling platform system 8 and a soil material scattering system 2 to reciprocate on the test pavement 3 along the X direction through a driving block assembly 52; the cleaning and sampling platform system 8 and the soil material scattering system 2 are distributed along the width direction of the test pavement 3; the end point of the test pavement 3 is provided with a traction device and an anti-collision system, and the starting point of the test pavement 3 is provided with a braking device;

referring to fig. 2, the cleaning and sampling platform system 8 comprises a sampling module 88, a local drying module 87, a water knife assembly 84 and an air knife assembly 85, wherein the sampling module 88 reciprocates in the cleaning and sampling platform system 8 along the width direction Y of the test pavement 3;

referring to fig. 3, the soil spreading system 2 includes a spreader 22, and the spreader 22 reciprocates in the width direction Y of the test pavement 3 in the soil spreading system 2.

Referring to fig. 4 to 8, the side driving device 5 includes a side driving frame 51, a driving block, an organ cover assembly 53, a drag chain assembly 54,

the side driving rack 51 comprises a supporting rack 511, a rack 512 and a guide rail 513, wherein the supporting rack 511 is longitudinally fixed on the ground along one side of the road surface, teeth of the rack 512 face upwards and are longitudinally fixed on the surface of the supporting rack 511 along the supporting rack 511, and the guide rail 513 is longitudinally and parallelly arranged along the supporting rack 511 to be fixed on the surface of the supporting rack 511; the rack 512 is located between two of the guide rails 513;

referring to fig. 9, 10 and 17, the driving block includes a driving block assembly 52, a side slider 524 and a slider mounting plate 525, the driving block assembly 52 includes a driving motor 521, a speed reducer 522 and a gear 523, the side slider 524 is disposed on the outer side of the vertically disposed slider mounting plate 525 and is slidably connected to the guide rail 513 corresponding to the two guide rails 513, the gear 523 at the end of a gear shaft 529 penetrating through a through hole of the slider mounting plate 525 is meshed with the rack 512, and the other end of the gear shaft 529 is driven by the speed reducer 522 of the driving motor 521 in a driving shaft connection manner; the driving motor 521 and the reducer 522 are fixed on the slider mounting plate 525;

Referring to fig. 10, a horizontal slider mounting bearing seat 57 is fixed inside the slider mounting plate 525, a bearing 571 is embedded in the slider mounting bearing seat 57, an optical axis 572 tightly matched with the inner wall of the bearing 571 is arranged in the bearing 571, the other end of the optical axis 572 is embedded in an inner hole of an optical axis fixing seat 573 to be tightly matched, and the optical axis fixing seat 573 is fixed with the side surface of the connecting frame 90.

Preferably, the upper and lower ends of the optical axis 572 are respectively inserted into the inner holes of the upper and lower optical axis holders 573 to be tightly fitted, and the upper and lower optical axis holders 573 are fixed to the side surfaces of the connection frame 90. The supporting frame 511 is a vertically arranged channel steel which is fixed on the ground through expansion bolts, and an adjusting screw is arranged to level the supporting frame 511. The support frame 511 and the connecting frame 90 are both rigid frame structures. The side driving frame 51 is provided with a drag chain assembly 54. An organ cover 53 is provided on the side driving frame 51. The travel switch and the limiting block are arranged at the limiting positions at the two ends of the supporting frame 511, the sliding block mounting plate 525 of the side driving assembly touches the travel switch, so that two vehicles, namely the cleaning and sampling platform system 8 or the soil material scattering system 2, stop moving and are positioned at the limiting block, and then rotate for 90 degrees to retract the wall. The preset program controls the rotating speed of the motor, changes the meshing speed of the gear and the rack, further controls the moving speed of the driving block, and divides the motion process of the cleaning and sampling platform system 8 or the soil material scattering system 2 into an acceleration section, a uniform speed section and a deceleration section.

The cleaning and sampling platform system 8 is shown in fig. 2, and comprises a sampling module 88, a local drying module 87, a water knife assembly 84 and an air knife assembly 85; the bottom supporting frame structure 6 is shown in fig. 11, and the supporting frame structure 6 comprises a grid framework 61 arranged at the front section along the walking direction X and a track framework 62 arranged at the rear section along the Y direction; the grid framework 61 is provided with a water knife assembly 84 and an air knife assembly 85; a track 621 along the Y direction and a sampling module Y-direction moving device which moves reciprocally on the track 621 are arranged on the track skeleton 62;

referring to fig. 12 and 16, the sampling module Y-direction moving device includes a sampling module support 7, the sampling module 88 is fixed on the sampling module support 7, and a sampling slider 715 is installed on the bottom surface of the sampling module support 7 and is connected with the rail 621 in a sliding fit manner; a sampling driving block assembly 52 is arranged on the sampling module support 7, and the driving block assembly 52 drives the sampling module support 7 to move on the track 621 along the Y direction;

referring to fig. 11, a local drying module 87 is disposed on the back side of the rail 621 on the support frame structure 6, and referring to fig. 15, the local drying module 87 is hinged with the support frame structure 6 and is controlled by a start-stop switch to be vertical or parallel to the road surface;

One end of the grid framework 61 is fixed with a traction connecting frame 90 extending along the Y direction as shown in fig. 11, and the optical axis fixing seat 573 is fixed with the side surface of the connecting frame 90; the bottom surface of the support frame structure 6 is provided with a driving wheel 26.

Preferably, the track skeleton 62 includes two tracks 621 parallel to each other along the Y direction and a first rack 612, where teeth of the first rack 612 face to the side and are disposed between the two tracks 621; the driving block assembly 52 shown in fig. 16 comprises a driving motor 521, a reducer 522, a coupling 526, a gear shaft 524, and a gear 523 which are sequentially connected, wherein the gear 523 is meshed with the rack one 612 and is driven by the driving motor 521; the driving block assembly 52 is fixed on the sampling module bracket 7 through a connecting plate 9; the gear shaft 524 penetrates through the through hole of the connecting plate 9, and the speed reducer 522 is fixed on the plate surface of the connecting plate 9; four corners of the connecting plate 9 are fixed on the sampling module support 7 through bolts. Referring to fig. 13 and 14, two sets of hinge assemblies 71 are arranged at the bottom of the sampling module bracket 7 in parallel along the Y direction, and the hinge assemblies 71 comprise a swing plate 711 horizontally arranged at the upper part, a mounting plate 712 horizontally arranged at the lower part and a hinge support 713 at the middle part; the bottom surface of the swing plate 711 is fixed with an ear-shaped hinge block with a shaft hole, two inverted T-shaped plate-shaped hinge supports 713 with the shaft holes are symmetrically fixed on two sides of the upper surface of the mounting plate 712, the hinge blocks are inserted into the middle of the two hinge supports 713 and then are hinged and connected through a pin shaft 714, the bottom surface of the mounting plate 712 is fixed with a sampling sliding block 715, and the swing plate 711 is fixedly connected with the sampling module platform bracket 7; the axial direction of the pin shaft 714 is consistent with the sliding direction of the sliding block; the shaft hole of the hinged support 713 is provided with a through adjusting notch upwards, the upper part of the shaft hole of the hinged support 713 is divided into two half parts, and the two half parts are connected with each other through an adjusting bolt to adjust the size of the shaft hole; the swing plate 711 is provided with a plurality of transverse kidney-shaped holes, and bolts are arranged in the kidney-shaped holes to fix the hinge assembly 71 and the sampling module bracket 7. The support frame structure 6 is driven by the side driving device 5 to drive the traction connection frame 90 to reciprocate along the X direction. The water knife assembly 84 comprises a high-pressure plunger pump 81, a motor 82, a jet pipe assembly 86 and a nozzle 861, wherein the high-pressure plunger pump 81 and the motor 82 are arranged in the middle of the grid framework 61, and water is sprayed from an external water tank through the jet pipe assembly 86 from the nozzle 861 at the front end of the grid framework 61; the air knife assembly 85 comprises a fan 83, an air compressor and an air storage tank 89 and an air knife 851, wherein driving motors 82 of the fan 83 and the fan 83 are arranged on two sides of the high-pressure plunger pump 81, the air compressor and the air storage tank 89 are arranged on the rear side of the high-pressure plunger pump 81, and air enters the air compressor and the air storage tank 89 through the fan 83 and is sprayed out of the air knife 851 at the front end of the grid framework 61 through an air pipe. The drive wheel is driven by a motor mounted on the support frame 6.

Referring to fig. 3, 18, 19 and 20, the soil spreading system 2 includes a spreader 21, a spreader 22 and a spreader driving device 226, where the spreader 21 is a supporting frame structure, the supporting frame includes a main supporting frame 23 that is transversely disposed and an auxiliary supporting frame 24 that is disposed on a front side of the main supporting frame 23, the spreader 22 is disposed on the main supporting frame 23, a connecting frame 90 is disposed at one end of the main supporting frame 23 along a transverse direction, the connecting frame 90 is a frame structure, the optical axis fixing seat 573 is fixed to a side surface of the connecting frame 90, and the spreader driving device 226 that drives the spreader 22 to transversely move is disposed on the auxiliary supporting frame 24;

the cloth rack 21 is supported on the ground through a driving wheel 26 and a guide wheel 27 which are arranged at the bottom of the cloth rack;

referring to fig. 20, two parallel guide rails two 28 are transversely arranged on the upper surface of the main body supporting frame 23, the spreader 22 is arranged between the guide rails two 28, a sliding block 29 in sliding fit with the guide rails two 28 is arranged on the spreader 22, and the spreader 22 is hinged with the sliding block 29 through four hinge assemblies two 210 with fixed corners; the two sliders 29 on the second guide rail 28 on one side are fixedly connected through a slider connecting plate 211, and the spreader driving device 226 drives the slider connecting plate 211 to drive the spreader 22 to transversely reciprocate through connection.

21-31, the spreader 22 includes a driving roller motor 213, a vibrating block motor 212, a material conveying net belt 214, a driving glue shaft 215, a driven glue shaft 216, a vibrating block shaft 217, a housing 218, a hopper 219, a vibrating block 229 and an adjusting plate 230; referring to fig. 21 and 29, a funnel-shaped hopper 219 is disposed on the upper surface of the housing 218, an opening of the hopper 219 is opposite to the material conveying mesh belt 214 horizontally disposed in the housing 218, the material conveying mesh belt 214 is driven, conveyed and supported by a driving rubber shaft 215 and a driven rubber shaft 216 which are transversely disposed in the housing 218, two ends of the driving rubber shaft 215 and the driven rubber shaft 216 are supported by bearings in through holes in the side wall of the housing 218, a pulley which is sleeved and connected on an end part of the driving rubber shaft 215 extending out of the same side wall of the housing 218 is connected by belt transmission, and a pulley which is sleeved and connected on an end part of the driving rubber shaft 215 extending out of the other side wall of the housing 218 is connected with a pulley which is sleeved and connected on an output shaft of the driving roller motor 213 fixed on the other side wall by belt transmission; referring to fig. 27, 28 and 29, the side wall of the casing 218 on the same side of the driving rod motor 213 is provided with the vibrating block motor 212, a pulley sleeved on an output shaft of the vibrating block motor 212 is connected with a pulley sleeved on an end part of the side wall of the casing 218 and extending out of the vibrating block shaft 217 transversely supported in the material conveying belt 214 through belt transmission, the vibrating block shaft 217 is an upper side and a lower side which are respectively transversely arranged on one side of the bottom of the upper and lower belts of the material conveying belt 214, a plurality of vibrating blocks 229 are sleeved on the vibrating block shaft 217 in a sleeved mode, two ends of the vibrating block shaft 217 are supported through bearings in through holes in the two side walls of the casing 218, and the vibrating block motor 212 drives the vibrating block shaft 217 to rotate through belt transmission and vibrates the material conveying belt 214 through the vibrating blocks 229 on the vibrating block shaft 217; referring to fig. 29 and 30, the middle position of the bottom of the upper belt of the material conveying belt 214 is horizontally provided with an adjusting plate 230 for adjusting the gap between the upper belt and the lower outlet of the hopper 219, and two ends of the adjusting plate 230 are connected with the side wall of the housing 218 by screws. Referring to fig. 31 and 23, the spreader driving device 226 includes a screw driving motor 220, a screw 221, a screw nut 222, a sliding table 223, a bearing seat 224, a connecting piece 232, and a hinge seat 233; the output shaft of the screw rod driving motor 220 is connected with one end of the screw rod 221, the other end of the screw rod 221 sequentially penetrates through holes in two bearing seats 224 fixed on the auxiliary supporting frame 24 and is supported by bearings on the through holes, the screw rod driving motor 220 is fixedly connected with the end faces of the bearing seats 224, a screw nut 222 in screw transmission with the screw rod 221 is sleeved on the screw rod 221 between the bearing seats 224, a sliding table 223 is horizontally arranged on the screw nut 222, a connecting piece 232 is arranged on the upper surface of the sliding table 223, one end of the connecting piece 232 is fixedly connected with the sliding table 223, the other end of the connecting piece 232 is hinged with a hinged seat 233 fixed in the middle of a sliding block connecting plate 211 after extending longitudinally, the hinged shaft is axially in the same direction as the two guide rails 28, the screw rod driving motor 220 is connected and drives the screw rod nut 222 to transversely and spirally drive the sliding block connecting plate 211, and the sliding block 211 is transversely and reciprocally moved through the sliding table 223 and the connection of the sliding table 223 and the connecting piece 232. Referring to fig. 25 and 26 in detail, the second hinge assembly 210 includes a second swing plate 2101 disposed vertically on an upper portion, a second mounting plate 2102 disposed horizontally on a lower portion, and a second hinge support 2103 disposed in a middle portion; the second swinging plate 2101 is a T-shaped plate with a hinge hole on one end, two inverted T-shaped hinge supports 2103 with shaft holes are symmetrically fixed on two sides of the upper surface of the second mounting plate 2102, the end on one side of the second swinging plate 2101 is inserted into the middle of the second hinge supports 2103 and then is hinged and connected through a second hinge pin 2104, the sliding block 29 is fixed on the bottom surface of the second mounting plate 2102, the end on the other side of the second swinging plate 2101 is fixedly connected with the distributing machine 22, and the axial direction of the second hinge pin 2104 is consistent with the sliding direction of the sliding block 29. The material conveying mesh belt 214 is an annular driving belt with the surface evenly covered with meshes. The second guide rail 28 is externally sleeved with the organ cover 225, one end of the organ cover 225 is fixedly connected with the end part of the second guide rail 28, and the other end of the organ cover is arranged to be capable of freely stretching and retracting along the second guide rail 28. The front end beam of the main body supporting frame 23 is provided with a vertical rectangular frame 228, the upper surface of the rectangular frame 228 is transversely provided with a drag chain 227, the fixed end of the drag chain 227 is fixedly connected with the rectangular frame 228, and the movable end of the drag chain 227 is fixedly connected with the spreader 22 and synchronously and transversely reciprocates along with the spreader 22. The driving rod motor 213, the vibrating block motor 212, the screw driving motor 220 and the driving wheel 26 are controlled by a control module. The hinge seat 233 and the hinge support second 2103 are symmetrically arranged.

Referring to fig. 32 to 37, the traction braking anti-collision system 4 is arranged on the test pavement 3, referring to fig. 32 and 33, a braking device is arranged at the starting point of the test pavement 3, a traction device is arranged at the end point of the test pavement 3, and an anti-collision guardrail 45 is arranged in front of the traction device at the end point of the test pavement 3;

referring to fig. 35 and 37, the traction device includes a variable frequency motor 46, a first coupling 47, a first speed reducer 48, a second coupling 49, a first bearing seat 410, a first roller 411, a first wire rope 412, and a hook 413, wherein the hook 413 is connected with the front part of the tested road sweeper 44 and drives the tested road sweeper 44 to move forward;

referring to fig. 34 and 36, the braking device includes a rotary motor 417, a third coupling 418, a switching shaft 419, a bidirectional overrunning clutch 420, a second roller 421, a second wire rope 422, a second bearing seat 423, an electromagnetic clutch 424, a magnetic powder brake 425, and a hook 413; the hook 413 is fixedly connected with the tail of the tested road sweeper 44;

the rotary motor 417 is connected to drive the second drum 421 through the third coupling 418, the adapter shaft 419 and the bidirectional overrun clutch 420, one end of the central shaft of the second drum 421 is driven to rotate in a bidirectional synchronous manner, the other end of the central shaft of the second drum 421 is sequentially connected to the electromagnetic clutch 424 and the magnetic powder brake 425, two ends of the central shaft of the second drum 421 respectively penetrate through the through hole of the second bearing seat 423 and are supported by the bearing arranged on the through hole, the magnetic powder brake 425 brakes the second drum 421 to rotate in a sliding motion way through engaging the electromagnetic clutch 424, the second drum 421 drives the second wire rope 422 wound on the surface of the second drum to do a rewinding motion, and the second wire rope 422 is connected to the rear part of the road sweeper 44 through the hook 413 fixedly connected with the free end of the second wire rope 422 to stop the motion.

Referring to fig. 35 and 37, the variable frequency motor 46 of the traction device drives the input shaft 414 of the first speed reducer 48 through the first coupling 47, the output shaft 415 of the first speed reducer 48 is connected with the central shaft of the first roller 411 through the second coupling 49 to drive the first roller 411 to coaxially and synchronously rotate, two ends of the central shaft of the first roller 411 respectively pass through the through hole of the first bearing seat 410 and are supported by bearings arranged on the through hole, the first roller 411 drives the first wire rope 412 wound on the roller surface to do rewinding motion, and the free end of the first wire rope 412 is fixedly connected with the hook 413.

The first roller 411 is fixedly connected with the central shaft of the first roller 411 in a coaxial manner; the second roller 421 is fixedly connected to the central shaft of the second roller 421 coaxially.

The variable frequency motor 46, the first speed reducer 48 and the first bearing seat 410 are supported and fixed through the first bracket 43; the rotary motor 417, the magnetic powder brake 425 and the bearing seat II 423 are supported and fixed through the bracket II 42; the first bracket 43 and the second bracket 42 are fixed on the ground through anchor bolts 426.

The first roller 411 and the second roller 421 are horizontally arranged along the transverse direction of the test pavement 3.

The impact surface of the anti-collision railing 45 is provided with a plurality of groups of tires 416.

The traction device and the braking device control traction or braking of the test carriage 44 through a PLC.

Referring to fig. 38 to 43, the method for testing the cleaning performance test stand of the road sweeper comprises the following steps:

1) Zeroing: before the test starts, the cleaning and sampling platform system 8 and the soil material scattering system 2 are respectively arranged on one side of the test pavement 3 and are set to be at a zeroing position; see fig. 38;

2) Cleaning a road surface: the cleaning and sampling platform system 8 is driven to move onto the test pavement 3 through the driving wheel 26; the cleaning and sampling platform system 8 is driven by the side driving device 5 to reciprocate along the X direction, the water knife assembly 84 and the air knife assembly 85 on the cleaning and sampling platform system 8 start to work, and the test pavement is cleaned and purged until the cleaned test pavement 3 meets the material distribution condition, and then the cleaning and sampling platform system 8 returns to the zero-resetting position; see fig. 39;

3) Cloth: the soil material spreading system 2 is driven to move onto a test pavement through a driving wheel 26 thereof; the cloth machine 22 firstly drives the side driving device 5 to distribute materials along the X direction on one half of the test pavement 3, after the completion, the cloth machine 22 moves to the other half of the test pavement 3 along the Y direction, the cloth machine again distributes the materials along the X direction, and after the completion of the cloth, the cloth machine 22 returns to the zero-returning position; see fig. 40;

4) Sampling for the first time: the cleaning and sampling platform system 8 is swung out from the side, the local drying module 87 starts to work after being driven by the side driving device 5 to move to a designated position along the X direction, the designated area is locally dried, then under the action of the Y-direction moving device of the sampling module 88, the sampling module 88 moves to the dried designated sampling point area, the sampling points are respectively weighed after sampling is finished, cloth uniformity detection is carried out, and after a single sampling point is finished, a sampling frame on the sampling module 88 moves to the curb side, so that a sampling sample is conveniently taken out; after sampling of all sampling points is completed, the cleaning and sampling platform system 8 returns to a zero return position; see fig. 41;

5) Road sweeper operation: the detected road sweeper 44 is reversely driven into the road surface along the curb side, and the direction of the head of the detected road sweeper 44 is adjusted to be consistent with the X direction of the test road surface 3; hanging a first traction steel wire rope 412 above the test pavement 3 on a detected road sweeper head hook, hanging a second brake steel wire rope 422 on a detected road sweeper 44 tail hook, starting the traction device to accelerate the detected road sweeper 44 at a specified speed, pass the test pavement 3, and simultaneously carry out road sweeping operation, and starting the brake device after the detected road sweeper 44 finishes operation to pass the test pavement 3, so that the detected road sweeper 44 is decelerated until stopping; removing the first traction wire rope 412 and the first brake wire rope 422, returning the first traction wire rope and the first brake wire rope to the original positions, and driving the detected road sweeper 44 away from the test pavement 3; the front side of the traction device is provided with an anti-collision guardrail 45 for protecting the detected road sweeper 44, a traction mechanism and other facilities; see fig. 42;

6) Second sampling: the cleaning and sampling platform system 8 swings out of a zeroing position, the local drying module 87 starts to work after moving to a specified position along the X direction through the side driving device 5, local drying is carried out on a specified area, then under the action of the sampling module 88Y direction moving device, the sampling module 88 moves to a specified sampling point area, weighing is carried out after sampling is finished, cloth uniformity detection is carried out, and after a single sampling point is finished, a sampling frame moves to a curb side, so that sampling samples are conveniently taken out; after sampling of all sampling points is completed, the cleaning sampling platform system 8 returns to the zero-returning position; see fig. 43;

7) And analyzing the twice-sampled sample data of the first sampling and the second sampling, and making a detection result.

Wherein steps 1) to 6) refer to fig. 38 to 43, respectively.

Travel switches are arranged at the limit positions at the two ends of the supporting frame 511, when the cleaning and sampling platform system 8 or the soil material scattering system 2 runs to the limit positions at the two ends, the slide block mounting plates 525 of the side driving devices 5 touch the travel switches, so that the cleaning and sampling platform system 8 or the soil material scattering system 2 stops moving and is stopped at the limit block, and then the cleaning and sampling platform system 8 or the soil material scattering system 2 rotates for 90 degrees to retract.

The drive wheel 26 is driven by a drive wheel motor mounted on the support frame 6; the speed of the linear motion of the driving wheel 26 and the driving block of the side driving device 5 along the X direction is the same; the cleaning and sampling platform system 8 and the soil material scattering system 2 are respectively provided with an angle sensor for detecting the included angle between the cleaning and sampling platform system 8 and the soil material scattering system 2 and the X direction, and the speed along the X direction is controlled.

During normal running, the driving speeds of the motors in the driving wheel 26 and the side driving device 5 are kept consistent, and when phenomena such as road surface slipping and the like occur, and the side displacement is inconsistent with the driving wheel displacement, namely, when the angle between the side driving device 5 and the soil material scattering system 2 or the cleaning and sampling platform system 8 is changed from 90 degrees to an acute angle or an obtuse angle, an angle sensor is triggered, and at the moment, the side motors or the driving wheel motors are accelerated on one side until the soil material scattering system 2 or the cleaning and sampling platform system 8 is kept perpendicular to the side driving device 5.

Claims

1. The road sweeper cleaning performance test bed comprises a test pavement (3), a sampling module (88), a local drying module (87), a water knife assembly (84), an air knife assembly (85) and a spreader (22), and is characterized by further comprising a cleaning sampling platform system (8), a soil material scattering system (2) and a side driving device (5);

A side driving device (5) is arranged on one side of the test pavement (3) along the length direction X of the pavement, and the side driving device (5) is respectively hinged with and drives a cleaning and sampling platform system (8) and a soil material scattering system (2) to reciprocate along the X direction on the test pavement (3) through a driving block assembly (52); the cleaning and sampling platform system (8) and the soil material scattering system (2) are distributed along the width direction of the test pavement (3);

the cleaning and sampling platform system (8) comprises the sampling module (88), the local drying module (87), the water knife assembly (84) and the air knife assembly (85), wherein the sampling module (88) reciprocates along the width direction Y of the test pavement (3) in the cleaning and sampling platform system (8);

the soil material spreading system (2) comprises the material distributing machine (22), and the material distributing machine (22) reciprocates along the width direction Y of the test pavement (3) in the soil material spreading system (2).

2. The road sweeper cleaning performance test stand according to claim 1, characterized in that the side driving means (5) comprises a side driving frame (51), a driving block, an organ cover assembly (53), a drag chain assembly (54),

The side driving frame (51) comprises a supporting frame (511), a rack (512) and a guide rail (513), wherein the supporting frame (511) is longitudinally fixed on the ground along one side of a road surface, teeth of the rack (512) face upwards and are longitudinally fixed on the surface of the supporting frame (511) along the supporting frame (511), and the guide rail (513) is longitudinally arranged in parallel along the supporting frame (511) to form two guide rails which are fixed on the surface of the supporting frame (511); the rack (512) is positioned between the two guide rails (513);

the driving block comprises a driving block assembly (52), side sliding blocks (524) and a sliding block mounting plate (525), the driving block assembly (52) comprises a driving motor (521), a speed reducer (522) and a gear (523), the side sliding blocks (524) are arranged on the outer side of the vertically arranged sliding block mounting plate (525) and are connected with the guide rails (513) in a sliding fit manner, the gear (523) at the tail end of a gear shaft (529) penetrating through a through hole of the sliding block mounting plate (525) is meshed with the gear rack (512), and the other end of the gear shaft (529) is driven by the driving shaft of the speed reducer (522) of the driving motor (521); the driving motor (521) and the speed reducer (522) are fixed on the sliding block mounting plate (525);

The horizontal sliding block mounting bearing seat (57) is fixed on the inner side of the sliding block mounting plate (525), a bearing (571) is embedded in the sliding block mounting bearing seat (57), an optical axis (572) which is tightly matched with the inner wall of the bearing (571) is arranged in the bearing (571), the other end of the optical axis (572) is tightly matched with the inner hole of the optical axis fixing seat (573), and the optical axis fixing seat (573) is fixed on the side face of the connecting frame (90).

3. The sweeper cleaning performance test bench according to claim 1, characterized in that the cleaning and sampling platform system (8) further comprises a bottom support frame structure (6), the support frame structure (6) comprising a grid skeleton (61) arranged in the front section in the direction of travel X and a rail skeleton (62) arranged in the direction of Y in the rear section; the grid framework (61) is provided with the water knife component (84) and the air knife component (85); two rails (621) and a first rack (612) which are parallel to each other along the Y direction are arranged on the rail framework (62), and the first rack (612) is arranged between the two rails (621);

the sampling module Y-direction moving device comprises a sampling module support (7), the sampling module (88) is fixed on the sampling module support (7), and a sampling sliding block (715) is hinged to the bottom surface of the sampling module support (7) and connected with the track (621) in a sliding fit manner; the sampling module bracket (7) is provided with the driving block assembly (52), and a gear (523) of the driving block assembly (52) is meshed with the first rack (612) to drive the sampling module bracket (7) to move on the track (621) along the Y direction; the sampling driving block assembly (52) is fixed on the sampling module bracket (7) through a connecting plate (9); the gear (523) vertically extends out of the bottom of the sampling module bracket (7);

A local drying module (87) is arranged on the back side of the track (621) on the supporting frame structure (6), and the local drying module (87) is hinged with the supporting frame structure (6) and is controlled to be vertical or parallel to a road surface by a start-stop switch;

one end of the grid framework (61) is fixed with a traction connecting frame (90) extending along the Y direction; the bottom surface of the supporting frame structure (6) is provided with a driving wheel (26).

4. The road sweeper cleaning performance test stand according to claim 1, characterized in that the soil material scattering system (2) comprises a material distributing frame (21), a material distributing machine (22) and a material distributing machine driving device (226), wherein the material distributing frame (21) is of a supporting frame structure, the supporting frame comprises a main supporting frame (23) which is transversely arranged and an auxiliary supporting frame (24) which is arranged on the front side surface of the main supporting frame (23), the material distributing machine (22) is arranged on the main supporting frame (23), one end of the main supporting frame (23) is transversely provided with a traction connecting frame (90), the traction connecting frame (90) is of a frame structure, and the auxiliary supporting frame (24) is provided with the material distributing machine driving device (226) which drives the material distributing machine (22) to transversely move;

The cloth rack (21) is supported on the ground through a driving wheel (26) and a guide wheel (27) which are arranged at the bottom of the cloth rack;

two parallel guide rails II (28) are transversely arranged on the upper surface of the main body supporting frame (23), the distributing machine (22) is arranged between the guide rails II (28), sliding blocks (29) which are in sliding fit with the guide rails II (28) are arranged on the distributing machine (22), and four corners of the distributing machine (22) are hinged with the sliding blocks (29); two sliding blocks (29) on the second guide rail (28) on one side are fixedly connected through a sliding block connecting plate (211), and the distributor driving device (226) drives the sliding block connecting plate (211) to drive the distributor (22) to transversely reciprocate through connection;

the distributor driving device (226) comprises a screw rod driving motor (220), a screw rod (221), a screw rod nut (222), a sliding table (223) and a connecting piece (232); the screw rod (221) sequentially penetrates through bearings on two bearing seats (224) fixed on the auxiliary support frame (24) to be supported, screw nuts (222) are sleeved on the screw rod (221) in a screw transmission mode, sliding tables (223) are horizontally fixed on the screw nuts (222), connecting pieces (232) are arranged on the upper surfaces of the sliding tables (223), one ends of the connecting pieces (232) are fixedly connected with the sliding tables (223), the other ends of the connecting pieces are hinged to the middle positions of sliding block connecting plates (211) after extending longitudinally, screw driving motors (220) are connected to drive the screw rod (221) to drive the screw nuts (222) to transversely and spirally drive the screw nuts (222), and the screw nuts (222) are connected to drive the sliding block connecting plates (211) to transversely reciprocate through the sliding tables (223) and the connecting pieces (232).

5. The sweeper cleaning performance test bed according to claim 1, characterized in that a traction braking anti-collision system (4) is arranged on the test pavement (3), and comprises a traction device and an anti-collision system which are arranged at the end point of the test pavement and a braking device which is arranged at the starting point of the test pavement; the anti-collision system is provided with an anti-collision guardrail (45) in front of the traction device;

the traction device comprises a variable frequency motor (46), a first coupling (47), a first speed reducer (48), a second coupling (49), a first bearing seat (410), a first roller (411), a first steel wire rope (412) and a hook (413), wherein the hook (413) is connected with the front part of a detected road sweeper (44) and drives the detected road sweeper (44) to move forwards;

the braking device comprises a rotary motor (417), a third coupling (418), a switching shaft (419), a two-way overrunning clutch (420), a second roller (421), a second steel wire rope (422), a second bearing seat (423), an electromagnetic clutch (424), a magnetic powder brake (425) and a hook (413); the hook (413) is fixedly connected with the tail of the road sweeper;

the variable frequency motor (46) of the traction device drives the first speed reducer (48) and the first roller (411) to rotate, the first roller (411) drives the first steel wire rope (412) wound on the roller surface of the first roller to do rewinding movement, and the free end of the first steel wire rope (412) is fixedly connected with the hook (413) to traction the front part of the road sweeper and drive the detected road sweeper (44) to move forwards;

The rotary motor (417) is connected and driven through the coupling III (418), the adapter shaft (419) and the bidirectional overrunning clutch (420) the central shaft one end of the roller II (421) drives the roller II (421) to synchronously and bidirectionally rotate, the other end of the central shaft of the roller II (421) is sequentially connected with the electromagnetic clutch (424) and the magnetic powder brake (425), the two ends of the central shaft of the roller II (421) respectively penetrate through the through hole of the bearing seat II (423) and are supported by bearings arranged on the through hole, and the magnetic powder brake (425) brakes the roller II (421) to rotate in a sliding motion mode through the electromagnetic clutch (424) in a sucking mode so that the road sweeper (44) stops moving.

6. The road sweeper cleaning performance test stand according to claim 2, characterized in that travel switches are arranged on the support frame (511) at extreme positions of two ends, and the slide block mounting plates (525) of the side driving devices (5) touch the travel switches to control the cleaning and sampling platform system (8) and the soil material scattering system (2) to stop moving.

7. A road sweeper cleaning performance test bench according to claim 3 or 4, characterized in that said drive wheel (26) is driven by a drive wheel motor mounted on said support frame structure (6); the speed of the driving wheel (26) and the driving block of the side driving device (5) moving along the X direction in a straight line is the same; the cleaning and sampling platform system (8) and the soil material scattering system (2) are respectively provided with an angle sensor for detecting the included angle between the cleaning and sampling platform system (8) and the soil material scattering system (2) and the X direction to control the speed along the X direction linear motion.

8. The method for testing the cleaning performance test stand of the road sweeper according to claim 5, comprising the steps of:

1) Zeroing: before the test starts, the cleaning and sampling platform system (8) and the soil material scattering system (2) are respectively arranged at one side of the test pavement (3) and are set to be at a zeroing position;

2) Cleaning a road surface: the cleaning and sampling platform system (8) is moved onto the test pavement (3) through a driving wheel (26) thereof; the cleaning and sampling platform system (8) is driven by the side driving device (5) to reciprocate along the X direction, a water knife assembly (84) and an air knife assembly (85) on the cleaning and sampling platform system (8) start to work, a test pavement is cleaned and purged until the cleaned test pavement (3) meets the material distribution condition, and then the cleaning and sampling platform system (8) returns to the zeroing position;

3) Cloth: the soil material spreading system (2) is moved to a test pavement through a driving wheel (26) thereof; the cloth machine (22) firstly drives a side driving device (5) to distribute materials along the X direction on a half-side test pavement (3), after the completion, the cloth machine (22) moves to the other half side of the test pavement (3) along the Y direction, the cloth machine again distributes the materials along the X direction, and after the completion of the cloth, the cloth machine (22) returns to the zero-returning position;

4) Sampling for the first time: the cleaning sampling platform system (8) is swung out from the side, the local drying module (87) starts to work after being driven by the side driving device (5) to move to a specified position along the X direction, the specified area is locally dried, then under the action of the sampling module (88) Y-direction moving device, the sampling module (88) moves to the dried specified sampling point area, the sampling points are respectively weighed after sampling is completed, cloth uniformity detection is carried out, and after a single sampling point is completed, a sampling frame on the sampling module (88) moves to the curb side, so that a sampling sample is conveniently taken out; after sampling of all sampling points is completed, the cleaning and sampling platform system (8) returns to a return-to-zero position;

5) Road sweeper operation: the detected road sweeper (44) is reversely driven into the road surface along the side of the curb, and the direction of the head of the detected road sweeper (44) is adjusted to be consistent with the X direction of the test road surface (3); hanging a first traction steel wire rope (412) above the test pavement (3) on a detected road sweeper head hook, hanging a second steel wire rope (422) on a detected road sweeper (44) tail hook, starting the traction device to enable the detected road sweeper (44) to accelerate at a specified speed, pass the test pavement (3) and simultaneously carry out road sweeping operation, and starting the braking device after the detected road sweeper (44) finishes operation and passes the test pavement (3), so that the detected road sweeper (44) is decelerated until stopping; taking down the first traction steel wire rope (412) and the second traction steel wire rope (422) and returning, and driving the detected road sweeper (44) away from the test pavement (3); the front side of the traction device is provided with an anti-collision guardrail (45) for protecting the detected road sweeper (44), the traction mechanism and other facilities;

6) Second sampling: the cleaning sampling platform system (8) swings out of a zeroing position, the local drying module (87) starts to work after moving to a specified position along the X direction through the side driving device (5), the specified area is locally dried, then under the action of the sampling module (88) Y-direction moving device, the sampling module (88) moves to a specified sampling point area, weighing is performed after sampling is completed, cloth uniformity detection is performed, and after a single sampling point is completed, a sampling frame moves to the side of a curb, so that a sampling sample is conveniently taken out; after sampling of all sampling points is completed, the cleaning sampling platform system (8) returns to a zero return position;

7) The twice sampled sample data is analyzed and a detection result is made.

9. The method for testing the road sweeper cleaning performance test stand according to claim 8, wherein a travel switch is arranged on the support frame (511) of the side driving device (5) at two end limit positions, when the cleaning and sampling platform system (8) or the soil material scattering system (2) is operated to the two end limit positions, the slide block mounting plate (525) of the side driving device (5) touches the travel switch, so that the cleaning and sampling platform system (8) or the soil material scattering system (2) stops moving and is stopped at a limiting block, and then is rotated for 90 degrees to retract.