CN110318361B - Sweeping device for sweeper - Google Patents
Sweeping device for sweeper Download PDFInfo
- Publication number
- CN110318361B CN110318361B CN201910596520.6A CN201910596520A CN110318361B CN 110318361 B CN110318361 B CN 110318361B CN 201910596520 A CN201910596520 A CN 201910596520A CN 110318361 B CN110318361 B CN 110318361B
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- Prior art keywords
- sweeping
- synchronous belt
- shell
- cleaning
- sweeper
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
- E01H1/0827—Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
- E01H1/0827—Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
- E01H1/0836—Apparatus dislodging all of the dirt by suction ; Suction nozzles
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
- E01H1/0827—Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
- E01H1/0836—Apparatus dislodging all of the dirt by suction ; Suction nozzles
- E01H1/0845—Apparatus dislodging all of the dirt by suction ; Suction nozzles with mechanical loosening or feeding instruments for the dirt to be sucked- up, e.g. brushes, scrapers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a sweeper and a sweeping device for the sweeper, wherein the sweeping device for the sweeper comprises: the synchronous belt transmission mechanism comprises a belt wheel and a synchronous belt; the annular track is arranged on the periphery of the synchronous belt in an annular closed shape, and a distance is kept between the annular track and the synchronous belt; at least three groups of cleaning mechanisms, wherein each group of cleaning mechanism comprises a shell, a second motor, a sweeping brush disc and a connecting part; the shell is positioned below the annular track, the second motor is fixed in the shell and can drive the sweeping brush disc to rotate, the connecting part is arranged at the top of the shell, the sweeping mechanism freely moves along the annular track through the connecting part, and the inner side of the connecting part is hinged with a connecting head fixed on the synchronous belt; the cleaning mechanisms are distributed at equal intervals along the annular track. The first motor drives the sweeping brush to revolve around the two belt wheels, and the second motor drives the sweeping brush disc to rotate, so that the sweeping brush disc can rotate and revolve, the ground passing by the sweeping machine can be swept, and the sweeping is basically free of missing.
Description
Technical Field
The invention relates to the field of environmental sanitation equipment, in particular to a sweeping device of a sweeper.
Background
The sweeper (or called sweeper) is an integrated garbage sweeper combining sweeping and dust collection, has the advantages of high working efficiency, low cleaning cost, good cleaning effect, high safety performance, high economic return rate and the like, is widely applied to cleaning of roads in various large, medium and small cities, and is particularly common in public places such as supermarkets, airports, stations and the like.
The existing sweeper has two forms of side brushes for sweeping garbage, one is fixed, and the side brush can only rotate around a fixed shaft and cannot move left and right or back and forth, such as the sweeper disclosed in the chinese patent with publication number CN 104790328A; in another type, the side brush can be driven by the supporting arm to move left and right and back and forth, such as a sweeper disclosed in the chinese utility model with publication No. CN 206467614U.
The two types of sweeper have the defects that the side brushes cannot move, the sweeping missing condition often occurs during sweeping, slag can leak from the gap between the two side brushes, the sweeping missing area needs to be swept again independently, and the repeated work and the lower efficiency are caused. Although the side brush can move, the movement of the side brush during cleaning needs manual operation, if a cleaning person does not detect slag or timely moves the side brush, the cleaning person also has the situation of missing cleaning, the cleaning person still needs to repeat cleaning again, and the problem of low efficiency is also caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a sweeper and a sweeping device for the sweeper.
The purpose of the invention is realized by the following technical scheme: sweeping device for machine of sweeping floor includes:
the synchronous belt transmission mechanism comprises two belt wheels and a synchronous belt, the synchronous belt is sleeved between the two belt wheels and is driven by the belt wheels to move, and one belt wheel is connected to an output shaft of the first motor;
the annular track is arranged on the periphery of the synchronous belt in an annular closed shape, and a constant distance is kept between the annular track and the synchronous belt;
at least three groups of cleaning mechanisms, wherein each group of cleaning mechanism comprises a shell, a second motor, a first bevel gear, a second bevel gear, a connecting shaft, a sweeping brush disc and a joining part; the sweeping brush disc is arranged at the bottom of the connecting shaft, and the bottom of the sweeping brush disc is provided with a sweeping head directly used for sweeping the ground; the connecting part is arranged at the top of the shell, the cleaning mechanism freely moves along the annular track through the connecting part, and the inner side of the connecting part is hinged with a connecting head fixed on the synchronous belt;
wherein, each group of cleaning mechanisms are distributed at equal intervals along the annular track.
Further, the connecting part comprises a top plate, a connecting plate, a roller and a supporting plate; the top plate is located circular orbit's top, the inboard of top plate with the connecting plate link up, the inboard of connecting plate pass through the lug structure with the connector articulated, the bottom of top plate with the top of shell is passed through the backup pad connect, the gyro wheel be located between top plate and the shell, the gyro wheel is rotatory around its central fixed axle, the gyro wheel can be along the slide that the circular orbit side set up slides.
Furthermore, each engaging part comprises four rollers, two of the rollers are positioned outside the annular rail, the other two rollers are positioned inside the annular rail, and the two rollers positioned on the same side of the annular rail are separated by the supporting plate.
Furthermore, a storage battery is arranged in the shell, and the output end of the storage battery is electrically connected with the input end of the second motor.
Furthermore, the cleaning head is a plastic brush.
When the cleaning machine works, the first motor and the second motors of all the groups of cleaning mechanisms are started; the rotation of the second motor drives the connecting shaft to rotate through the matching of the first bevel gear and the second bevel gear, so as to drive the sweeping brush disc below the connecting shaft to rotate, and the dust and slag on the ground are cleaned; the rotation of first motor then can drive the hold-in range through two band pulleys and rotate, and the rotation of hold-in range can drive each and clean the mechanism and rotate along the endless track circulation, and then sweep the floor brush dish and also will rotate along the endless track circulation. Therefore, when the sweeping brush disc works, on one hand, the sweeping brush disc can rotate around the connecting shaft, and on the other hand, the sweeping brush disc can revolve around the two belt wheels under the driving of the synchronous belt; when a sweeper drives or pushes the sweeper to move forwards, the rotation of the sweeping brush disc can clean dust and slag, and the revolution can transfer the sweeping range of the sweeping brush disc to the transverse direction; as long as the size design of each part is reasonable, the number of the cleaning mechanisms is reasonable, and the forward speed of the sweeper is proper, the sweeping device can ensure that the ground covered by the sweeping device can be cleaned, and even if slag leaks between any two cleaning mechanisms in the front, the slag can be swept by the rear cleaning mechanism.
Based on the principle, the invention has the following beneficial effects: the sweeping brush disc rotates and revolves, so that the possible missing sweeping condition when the sweeper passes is avoided, and the problems of repeated sweeping and repeated labor caused by the missing sweeping are avoided; in addition, compared with the existing sweeper with the side brush needing to be moved by manually operating the control rod, the sweeping device provided by the invention is installed on the sweeper, so that the condition of missing sweeping caused by the fact that a sweeper does not detect slag or does not move the side brush in time can be avoided.
The invention also provides a sweeper, which comprises a sweeper body and the cleaning device arranged below the sweeper body, wherein the cleaning device is the cleaning device.
Furthermore, the lowest point of the cleaning head in each cleaning mechanism of the cleaning device is located near the ground surface or can be driven by the driving mechanism to touch the ground surface.
Further, a dust suction device is provided above the region between the two pulleys.
Furthermore, a water spraying device is arranged in front of the cleaning device.
Drawings
FIG. 1 is a top view of the sweeping device of the present invention;
FIG. 2 is a schematic view of the connection between the cleaning mechanism and the timing belt in the present invention;
FIG. 3 is a schematic view of the sweeping mechanism of the present invention;
fig. 4 is a view taken along direction a of fig. 1.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
Example 1:
as shown in fig. 1 to 4, the cleaning device for the sweeper provided in this embodiment includes a synchronous belt transmission mechanism 1, an annular track 2, and at least three sets of cleaning mechanisms 3.
The synchronous belt transmission mechanism 1 includes two belt wheels 11 and a synchronous belt 12, the synchronous belt 12 is sleeved between the two belt wheels 11 and is driven by the belt wheels 11 to move, one belt wheel 11 is connected to an output shaft of the first motor 13, as shown in fig. 4, that is, the belt wheel 11 on the left side is connected to the output shaft of the first motor 13.
The circular track 2 is installed at the periphery of the synchronous belt 12 in a circular closed shape, and a constant distance is kept between the circular track 2 and the synchronous belt 12, that is, the distance between any position of the circular track 2 and the synchronous belt 12 is equal, as shown in fig. 1.
Referring to fig. 3, each of the group cleaning mechanisms 3 includes a housing 31, a second motor 32, a first bevel gear 33, a second bevel gear 34, a connecting shaft 35, a sweeping brush plate 36 and a connecting part 37; the outer shell 31 is located below the annular track 2, the outer shell is substantially rectangular and hollow, the tail of the second motor 32 is fixed on a vertical wall surface in the outer shell 31, an output shaft of the second motor 32 extends horizontally, the first bevel gear 33 is mounted at the end of the output shaft, the connecting shaft 35 is vertically arranged, the top of the connecting shaft 35 is provided with the second bevel gear 34, the second bevel gear 34 is meshed with the first bevel gear 33, the connecting shaft 35 vertically penetrates through the bottom of the outer shell 31 and is connected with the outer shell 31 at the penetrating position through the bearing 38, so that the connecting shaft 35 can rotate freely, the sweeping brush disc 36 is mounted at the bottom of the connecting shaft 35, and the bottom of the sweeping brush disc 36 is provided with a sweeping head 361 directly used for sweeping the ground; the engaging member 37 is mounted on the top of the housing 31, the cleaning mechanism 3 is freely moved along the circular rail 2 by the engaging member 37, and the inside of the engaging member 37 is hinged to the connecting head 4 fixed to the outside of the timing belt 12.
The cleaning mechanisms 3 are equally spaced along the circular track 2, and five cleaning mechanisms 3 are illustrated as an example, but it should be noted that the specific number of the cleaning mechanisms 3 is determined according to the size of each component of the cleaning device.
The engaging member 37 may be in various forms as long as the above function is satisfied, that is, the cleaning mechanism 3 is driven to slide along the endless track 2 along with the movement of the belt 12, and one of the forms is as follows: referring to fig. 2 and 3, the engagement member 37 includes a top plate 371, a connection plate 372, a roller 373, and a support plate 374; the top plate 371 is located above the circular track 2, the inner side of the top plate 371 is connected with the connecting plate 372, the inner side of the connecting plate 372 is hinged with the connecting head 4 through a lug structure 3721, the bottom of the top plate 371 is connected with the top of the housing 31 through the supporting plate 374, the rollers 373 are located between the top plate 371 and the housing 31, the rollers 373 can rotate around the central fixed shaft, the rollers 373 can slide along the slide rails 21 arranged on the side surfaces of the circular track 2, the number of the rollers 373 in each connecting part 37 is preferably four, two rollers 373 are located on the outer side of the circular track 2, the other two rollers 373 are located on the inner side of the circular track 2, and the two rollers 373 located on the same side of the circular track 2 are separated by the supporting plate 374, therefore, when the sweeping mechanism 3 slides along the circular track 2, the cleaning mechanism 3 is in rolling friction relation with the annular rail, the resistance is small, and the annular rail 2 is clamped by the other four rollers 373 from two sides, so that the possibility of being separated from the rail is avoided, and the sliding stability is ensured.
In some other configurations of the engaging member 37, the top plate 371 may be moved below the four rollers 373 and fixed directly to the upper top surface of the housing 31, so that the four rollers 373 are disposed above the top plate 371, while the supporting plate 374 is removed, the four rollers 373 are similarly clamped on both sides of the circular track 2, the inner side of the top plate 371 is also engaged with the connecting plate 372, and the inner side of the connecting plate 372 is also hinged to the connecting head 4 through the lug structure 3721. After adopting the structure, the top plate 371 does not cover the upper top surface of the circular track 2, so that the suspension rod or other parts can be fixed on the circular track 2, and the circular track 2 is fixed with the body of the sweeper.
In some embodiments, a storage battery 39 is further disposed in the housing 31, and an output end of the storage battery 39 is electrically connected to an input end of the second motor 32, that is, the storage battery 39 is used for providing power for the operation of the second motor 32.
Preferably, the cleaning head 361 is a plastic brush. Of course, if the cleaning apparatus of the present invention is used by being mounted on a floor-cleaning machine or a floor-mopping vehicle, the cleaning head 361 may be formed of a plurality of water-absorbent cloths, so that the floor can be cleaned by rotating the cleaning head 361.
Example 2:
the embodiment provides a sweeper, including the organism and install the cleaning device in this organism below, wherein, cleaning device adopts the cleaning device of embodiment 1, this cleaning device transversely installs in the organism below (two band pulleys 11 are located the left and right sides of organism respectively promptly), and cleaning device's span is equivalent with the width of organism.
The lowest point of the cleaning head 361 of each cleaning mechanism 3 of the cleaning device is located near the ground surface or can be driven by the driving mechanism to touch the ground surface.
A dust suction device is arranged above the area between the two belt pulleys 11, and after the dust suction device is arranged, referring to fig. 1, the action range of the dust suction device is approximately the range within the dotted line between the two belt pulleys 11 in fig. 1; once the cleaning head 361 cleans the dust and the slag within the range, the dust and the slag are sucked away by the dust collector.
The water spraying device is arranged in front of the cleaning device, so that water can be sprayed to wet the ground before cleaning when necessary, which is basically the same as the sweeper disclosed in the Chinese patent with the publication number of CN 104790328A.
It should be noted that, because the cleaning mechanism 3 moves during operation, and the second motor 32 inside the cleaning mechanism moves along with the cleaning mechanism, the start and stop control of the second motor 32 is preferably controlled in a wireless manner, a transmitter is disposed on the machine body, a receiver is disposed in the housing 31, the receiver is connected to the second motor 32, and when the second motor 32 needs to be started or stopped, the transmitter transmits a signal to the receiver to control the start and stop of the motor.
When the sweeping work is carried out, the first motor 13 and the second motors 32 of the sweeping mechanisms 3 of all the groups are started; the rotation of the second motor 32 drives the connecting shaft 35 to rotate through the cooperation of the first bevel gear 33 and the second bevel gear 34, and further drives the sweeping brush disc 36 below the connecting shaft 35 to rotate, and the sweeping head 361 cleans dust and slag on the ground; the rotation of the first motor 13 drives the synchronous belt 12 to rotate through the two belt pulleys 11, the rotation of the synchronous belt 12 drives each cleaning mechanism 3 to rotate along the circular track 2, and then the cleaning brush disc 36 rotates along the circular track 2. Therefore, during operation, the sweeping brush disc 36 rotates around the connecting shaft 35, and revolves around the two belt wheels 11 under the driving of the synchronous belt 12; when a sweeper drives or pushes the sweeper to move forwards, the rotation of the sweeping brush disc 36 can clean dust and slag, and the revolution can transfer the sweeping range of the sweeping brush disc 36 to the transverse direction; as long as the size design of each part is reasonable, the number of the cleaning mechanisms 3 is reasonable, and the forward speed of the sweeper is proper, the sweeper can be ensured to be cleaned when the sweeper covered by the sweeping device disclosed by the invention is used for sweeping the ground, even if slag leaks between any two front cleaning mechanisms 3, the slag can be swept by the rear cleaning mechanism 3, and once the swept dust and slag are brought into the action range of the dust collector by the sweeping head 361, the dust and slag can be sucked by the dust collector.
The sweeping brush disc 36 capable of rotating and revolving perfectly solves the problem that the sweeping machine may miss sweeping when walking, and avoids the problems of repeated sweeping and repeated labor when the sweeping machine misses sweeping. In addition, compared with the existing sweeper with the side brush needing to be moved by manually operating the control rod, the sweeper disclosed by the invention is installed on the sweeper, so that the condition of missed sweeping caused by the fact that a sweeper does not detect slag or timely move the side brush is avoided, and the floor passing by the sweeper can be swept, and basically no missed sweeping exists.
Claims (2)
1. The utility model provides a sweeping device for sweeper which characterized in that includes:
the synchronous belt transmission mechanism (1), the synchronous belt transmission mechanism (1) includes two belt wheels (11) and a synchronous belt (12), the synchronous belt (12) is sleeved between the two belt wheels (11) and is driven by the belt wheels (11) to move, wherein one belt wheel (11) is connected to the output shaft of the first motor (13);
the annular track (2) is installed on the periphery of the synchronous belt (12) in an annular closed shape, and a constant distance is kept between the annular track and the synchronous belt (12);
at least three groups of cleaning mechanisms (3), wherein each group of cleaning mechanism (3) comprises a shell (31), a second motor (32), a first bevel gear (33), a second bevel gear (34), a connecting shaft (35), a sweeping brush disc (36) and a connecting part (37); the sweeping brush disc (36) is mounted at the bottom of the connecting shaft (35), the sweeping brush disc (36) is provided with a sweeping head (361) directly used for sweeping the ground, and the bottom of the sweeping brush disc (36) is provided with the sweeping head (361) directly used for sweeping the ground; the connecting part (37) is arranged at the top of the shell (31), the cleaning mechanism (3) freely moves along the annular track (2) through the connecting part (37), and the inner side of the connecting part (37) is hinged with a connecting head (4) fixed on the synchronous belt (12);
wherein, each group of cleaning mechanisms (3) are distributed at equal intervals along the annular track (2);
the connecting part (37) comprises a top plate (371), a connecting plate (372), a roller (373) and a supporting plate (374); the top plate (371) is located above the circular track (2), the inner side of the top plate (371) is connected with the connecting plate (372), the inner side of the connecting plate (372) is hinged with the connecting head (4) through a lug structure (3721), the bottom of the top plate (371) is connected with the top of the shell (31) through the supporting plate (374), the roller (373) is located between the top plate (371) and the shell (31), the roller (373) rotates around a fixed shaft at the center of the roller (373), and the roller (373) can slide along a slide way (21) arranged on the side face of the circular track (2);
a storage battery (39) is also arranged in the shell (31), and the output end of the storage battery (39) is electrically connected with the input end of the second motor (32);
each of the engaging members (37) includes four of the rollers (373), two of the rollers (373) are located outside the endless track (2), the other two rollers (373) are located inside the endless track (2), and the two rollers (373) located on the same side of the endless track (2) are separated by the support plate (374).
2. The sweeping device of claim 1, wherein the sweeping head (361) is a plastic brush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910596520.6A CN110318361B (en) | 2018-05-24 | 2018-05-24 | Sweeping device for sweeper |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810510625.0A CN108487153B (en) | 2018-05-24 | 2018-05-24 | A kind of sweeper and sweeper clearing apparatus |
| CN201910596520.6A CN110318361B (en) | 2018-05-24 | 2018-05-24 | Sweeping device for sweeper |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810510625.0A Division CN108487153B (en) | 2018-05-24 | 2018-05-24 | A kind of sweeper and sweeper clearing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110318361A CN110318361A (en) | 2019-10-11 |
| CN110318361B true CN110318361B (en) | 2021-09-17 |
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ID=63351757
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810510625.0A Active CN108487153B (en) | 2018-05-24 | 2018-05-24 | A kind of sweeper and sweeper clearing apparatus |
| CN201910596523.XA Active CN110301865B (en) | 2018-05-24 | 2018-05-24 | Floor sweeper |
| CN201910596520.6A Active CN110318361B (en) | 2018-05-24 | 2018-05-24 | Sweeping device for sweeper |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810510625.0A Active CN108487153B (en) | 2018-05-24 | 2018-05-24 | A kind of sweeper and sweeper clearing apparatus |
| CN201910596523.XA Active CN110301865B (en) | 2018-05-24 | 2018-05-24 | Floor sweeper |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN108487153B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996973A (en) * | 2020-08-31 | 2020-11-27 | 怀化耀岷汽车货厢制造有限公司 | Environment-friendly road cleaning vehicle with adjustable cleaning range |
| CN112211451A (en) * | 2020-11-08 | 2021-01-12 | 湖南天桥利亨停车装备有限公司 | Stereo garage with foreign matter clearance mechanism |
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| CN207376543U (en) * | 2017-10-24 | 2018-05-18 | 孙润 | A kind of portable road cleaning machine in new city |
| CN107773200A (en) * | 2017-11-21 | 2018-03-09 | 安徽工程大学 | A kind of shoe sole clearing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108487153A (en) | 2018-09-04 |
| CN110318361A (en) | 2019-10-11 |
| CN108487153B (en) | 2019-06-14 |
| CN110301865A (en) | 2019-10-08 |
| CN110301865B (en) | 2022-01-25 |
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