CN104641952A - Cleaning Machine Device - Google Patents
Cleaning Machine Device Download PDFInfo
- Publication number
- CN104641952A CN104641952A CN201410674038.7A CN201410674038A CN104641952A CN 104641952 A CN104641952 A CN 104641952A CN 201410674038 A CN201410674038 A CN 201410674038A CN 104641952 A CN104641952 A CN 104641952A
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- CN
- China
- Prior art keywords
- machine equipment
- cleaning brush
- head roll
- cleaning machine
- cleaning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
- A01G20/40—Apparatus for cleaning the lawn or grass surface
- A01G20/43—Apparatus for cleaning the lawn or grass surface for sweeping, collecting or disintegrating lawn debris
-
- 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
- E01H15/00—Removing undesirable matter, e.g. rubbish, from the land, not otherwise provided for
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The present invention relates to a cleaning machine device (10), in particular to the cleaning machine device (10) which can be driven manually or can be combined with the maintenance vehicles, such as a tractor, a mowing tractor, a cell vehicle, etc., to clean a large area or the ground of an artificial grass. The cleaning machine device (10) comprises a cleaning brush (20), a driving roller (30), and a filtering and screening device (40) which is arranged between the cleaning brush (20) and the driving roller (30) and is used to collect the rubbish materials swept in by the cleaning brush (20). The cleaning brush (20) is connected with the driving roller (30) by a transmission set (50), so that when the cleaning machine device is used, and the driving roller (30) advances on the ground needing to be cleaned, the cleaning brush (20) can be driven.
Description
Technical field
The present invention is a kind of cleaning machine equipment, refer in particular to can manual adjustable or clean vehicle uses as robot or community cleaning cart combine or community cleaning cart is combined with each other the cleaning machine equipment of use, in order to clean large-area scope or artificial grass.
Background technology
Above-mentioned cleaning machine equipment is particularly used for clearing away the material of the artificial grass pollution be such as deposited in sports center as leaf or rubbish.Certainly the filler on artificial grass cannot be swept to when cleaning, in order to avoid damage the superincumbent top layer of paving.Also cannot leave over lower leaf or rubbish simultaneously, but region turf being not easy arrive very much cannot be omitted also.
Summary of the invention
The object of the present invention is to provide above-mentioned cleaning machine equipment, refer in particular to and a kind ofly simple to operately have the cleaning machine equipment that more can clean wide area concurrently.
Foregoing invention object can be reached with above-mentioned cleaning machine equipment.Above-mentioned cleaning machine equipment comprises a cleaning brush, a head roll and a screen apparatus be arranged between cleaning brush and head roll.Rubbish material collected by cleaning brush can be placed among screen apparatus.Cleaning brush a transmission mechanism and head roll are linked.When cleaning machine equipment just can drive cleaning brush to rotate when needing clean ground uses and head roll rotates.A very important key point is the power of cleaning machine equipment without the need for oneself, and this makes cleaning machine equipment be easy to operation.In addition, velocity of rotation and the head roll of cleaning brush match, so when cleaning machine equipment is advanced at a high speed, also can guarantee rubbish thing clean clean up hill and dale.Screen apparatus also has filtration and is filtered out by the artificial grass filler swept into because of carelessness in screen and be backfilling on this ground.
Said in subject application " cylinder " refers to microscler rolling entity.It also can design the pattern that becomes brush and common preference is that the brush of drum-type is designed to have the width the same with cleaning machine equipment.
The cleaning machine equipment de-sign of some behaviour preferences all will illustrate in each appended claims.In a most favourable embodiment be cleaning brush is arranged on cleaning machine equipment direct of travel head roll before, and the transmission mechanism of cleaning brush and head roll do the direction of same rotation.So swept on artificial grass after path just can be smoothed by head roll and stay next overall clean smooth looks to artificial grass.And same object can be reached by a power transmission direction contrary with direct of travel, cleaning brush and head roll are rotated with different directions, like this, cleaning machine equipment not only can it be functional with also can not having influence on advancing of pushing away of drawing.Generally speaking, cleaning machine equipment so just can be made more easily to operate, even can also use in narrow place.
In the second preferably embodiment, the cleaning brush in cleaning machine equipment is mounted in direct of travel after head roll, and the transmission mechanism of cleaning brush is contrary rotation direction with head roll.By the head roll of advancing rubbish thing can be become like this and loosen or do not sticking together on the ground, and reach more thoroughly effective cleaning.Same also can change the direction of advancing by suitable reverse drive, rotates from head roll to make cleaning brush with different directions.
Therefore cleaning machine equipment just can not advanced in tow can be pushed yet and be advanced, and can not have influence on that it is due functional.Generally speaking, cleaning machine equipment so just can be made more easily to operate, even can also use in narrow place.
In another preferably embodiment, can improve or reduce the velocity of rotation that head roll is transferred to cleaning brush.So just can adjust the gait of march of cleaning brush and clear equipment for different ground and dirty degree, so that the clean performance reaching the most sound at any time and the most reliably continue.
Also have in a better embodiment, cleaning machine equipment can use belt or chain, the transmission that can also be used as power by least one relaying power transmission shaft especially.Selection according to driving tools can allow cleaning brush serve as the work producing load in various degree because of different use regions and the dirty degree of cleaning floor.Reliable power transmission can be produced by relaying power transmission shaft, significantly degree of freedom can also carry out the transmission mechanism between design driven cylinder and cleaning brush simultaneously.
In another one preferably embodiment, the screen apparatus of cleaning machine equipment can be arranged in the rotating shaft of clean and/or head roll by least one eccentric shaft, and thus during this axis of rotation, screen apparatus will be swung by related generation.The shake of this therefore caused rubbish thing can make to form block rubbish and again can be broken up or just cannot form bulk at all, and such screen apparatus would not be blocked.
In another one preferably embodiment, the installation of the screen apparatus of cleaning machine equipment has more elasticity relative to power and/or cleaning brush, particularly uses strip-shaped rubber to install it can be swung.This mounting means cabinet that the vibrations of screen apparatus can be stoped to be communicated to cleaning machine equipment that can be shockproof gets on, otherwise can increase the work of maintenance and maintenance.This rubber filler strip can structurally use simpler mode to determine the arrangement of swinging axle simultaneously.
In another one preferably embodiment, the screen apparatus in cleaning machine equipment comprises the adjustable screen that screen that a kind fixes and can adjust distance.For that reason we just likely perform the rubbish screen operation of segmented.Surprisingly swept into the very little material of next volume, such as, fill material on artificial grass just can be isolated and separate again to be backfilling on turf.Because the distance of adjustable screen and gravity flow screen can unrestricted choice, so more can guarantee can to adjust on adjustable screen according to the degree of ground dirt or below larger collection space, so adjustable screen would not more above or get clogged below.Better design is that the sieve aperture can adjusting screen is designed to the 2-3 of fixing screen sieve aperture doubly.The ratio of this sieve aperture can reach especially effectively and rubbish is separated reliably, and especially those are swept into the rubbish come because of carelessness, such as, filler on artificial grass can effectively separated after send back to ground and get on.
In another one preferably embodiment, one in cleaning machine equipment, is had to be used at the support sled needing clean ground supports cleaning machine equipment.Support sled to be installed between cleaning brush and screen apparatus.Support sled can allow cleaning brush climb setting height, so just can maintain the cleaning quality of certain standard.Preferably the practice allows support sled can load onto one garbage substance can be allowed to be transported to the guiding sheet metal of screen apparatus from cleaning brush.Like this can omit especially targetedly and thoroughly the material that removes rubbish.Better mode can allow support to prize do vertical adjustment relative to cleaning brush and/or head roll.The different clean degree of depth of adjustment and clean degree can be made a reservation for like this.
In another one preferably embodiment, in cleaning machine equipment, head roll becomes the cylinder having moulding, particularly has a kind of spinosity cylinder.So just can avoid the slip that may occur on the ground and guarantee the reliability of the power of cleaning roller, simultaneously when head roll is walked at cleaning brush, can also loosen and/or get loose garbage substance.
In another one preferably embodiment, in cleaning machine equipment, the length of head roll at least can reach 25% of cleaning brush length, is more preferred from 50% or be more preferred from least 70% especially.The best ratio obtained under the design of simplifying most between power and cleaning effect can taken into account like this.When considering that compact structure designs especially, the highest dynamic efficiency can be reached when head roll length the same as cleaning brush under.
In another one preferably embodiment, the head roll in cleaning machine equipment and/or cleaning brush have all individually at least two independent segment cylinder or part brush.The cylinder of these parts or the brush of part can be arranged on other driving shaft or brush axle, and these other driving shafts or brush axle also can be driven by independent other segment cylinder or part brush, and the impact whether part not being subject to other is skidded on the ground at the segment cylinder on same power transmission shaft or part brush or blocked by garbage substance.The total length that all various piece cylinders or part brush are added up all is equivalent to the length of head roll or cleaning brush.
In another one preferably embodiment, in cleaning machine equipment, the installation of cleaning brush is all parallel with the axis of head roll.Get up with the cleaning brush tilting to install and the simple structure comparison of cleaning machine equipment, such installation form can obtain extra high cleaning efficacy.
Last in another one preferably embodiment, the surface profile of the cleaning brush in cleaning machine equipment comes soft than the surface of head roll.This design can make power to skid and better comb can be had to sweep effect to the ground of cleaning.
According to size and the kenel on the ground that will clean, particularly artificial turf surface, above-mentioned cleaning machine equipment should as a kind of can be manual cleaning machine or and a maintaining vehicle, such as tractor or community cleaning cart conbined usage.
Accompanying drawing explanation
The schematic diagram of an embodiment example is all indicated in following accompanying drawing.
Fig. 1 can travel the side view of the section of cleaning machine equipment by hand push.
Fig. 2 can travel the side view of another section of cleaning machine equipment by hand push.
Fig. 3 can travel the side view of another section of cleaning machine equipment by hand push.
Fig. 4 a is the side view of screen position profile on difference 1/4th turns of eccentric shafts.
Fig. 4 b is the eccentric shaft of 1/2nd turns of difference on Fig. 4 a.
Fig. 4 c is the eccentric shaft of 3/4ths turns of difference on Fig. 4 a.
Fig. 4 d is the eccentric shaft that on Fig. 4 a, difference one is enclosed.
Fig. 5 can travel the stereogram of cleaning machine equipment oblique upper by hand push.
Fig. 6 is the three-dimensional exploded view of screen oblique upper.
Fig. 7 a is the adjustable screen cloth of screen apparatus in Fig. 6 and the relevant sieve aperture of amplification thereof.
Fig. 7 b is the fixed grit of screen apparatus in Fig. 6 and the relevant sieve aperture of amplification thereof.
Embodiment
Figure 1 shows that and can travel the side of the section of cleaning machine equipment 10 by hand push, wherein comprise a cleaning brush 20 and one in the present embodiment with the head roll 30 of the axial parallel installation of cleaning brush.
Between cleaning brush 20 and head roll 30, be provided with a screen apparatus 40, as to collect by cleaning brush 20 sweep into the use of material come.Screen apparatus 40 is applicable to screening and goes out unintentionally by what sweep to, similarly is the material of fill material etc. on artificial grass and it is sent back to again ground.The direction F that cleaning machine equipment 10 is advanced refers to the right in this enforcement case, and therefore the rotation direction U of head roll 30 is clockwise.Cleaning brush 20 is connected by (can't see on this section) transmission group and head roll 30.When head roll 30 is advanced on the ground, cleaning brush 20 can be driven and rotate with identical rotation direction U.When direct of travel F, can advance to head roll 30 in cleaning machine equipment 10 1 aspect, also on the other hand can slide towards support sled 60 simultaneously, now have a guiding sheet metal 61 can by by the cleaning brush 20 rotated sweep into the material come and direct in screen apparatus.In this mandatory declaration: brush 20 and 30 also can be installed on the contrary.In other words, with the direction P advanced, head roll 30 is arranged on the previous section of cleaning machine equipment 10, and cleaning brush 20 is arranged on the aft section of direct of travel.Above-mentioned transmission group can be designed so that cleaning brush 20 rotates with different directions from head roll 30.That is the direction that both rotate is different.
Anyway, can adjust with a rotating disk 62 height supporting sled 60 as height regulating mechanism, in order to adjustment cleaning brush 20 to the cleaning degree of depth on the ground that will clean.So just can adjust cleaning machine equipment 10 allows it can be useful in use in various Different Ground situation, and/or adjusts the gait of march that its use in the dirty form of various difference and scope and user want.Certain cleaning brush 20 also can coordinate various situation to change different states of ground also can be coordinated to change head roll 30, to avoid skidding in advancing.Can reliably by the fill material separating treatment of the material of dirt and such as artificial grass in screen apparatus 40.
The latter sends cleaning floor back to after being selected by sieve aperture S again, and other rubbish then can be retained in screen apparatus 40 li.Cleaning machine equipment described herein is without the need for the power of oneself.It can to combine and by it to draw action with any one traction machine easily.Therefore it can be easy to operation also very reliably with efficient.
Figure 2 shows that and can travel the side of another section of cleaning machine equipment 10 by hand push.This figure can find out above-mentioned sayed transmission group 50.Transmission group 50 is made up of gear and refining bar 51.Cleaning brush 20 also drives via the rotation of driving rolls 30 and a relaying power transmission shaft.Certainly other the transmission combination be applicable to also is also had, such as power transmission shaft shaft coupling.Belt gear in this example or chain drive can reach very firm, reliable effective power transmission between head roll 30 and cleaning brush 20 again.
Figure 3 shows that and can travel the side of another section of cleaning machine equipment by hand push, the left side, installation site showing screen apparatus 40 two sides in figure is fixedly mounted on inside a rubber strip that can shake 42, is then to be connected via the brush rotating shaft 21 of an eccentric shaft 41 with cleaning brush 20 on the right of it.The rotation being fitted through cleaning brush 20 eccentric on the right of screen apparatus and produce the rocking action of screen apparatus 40, and make rubbish material reliably effectively can do the action be separated, get in this ground such as filler on artificial grass can sent back to again.
The vibrations of screen apparatus 40 are produced in the installation that rubber is rectangular by the left side.The but rectangular effect also having shock-absorbing of rubber, makes the base of cleaning machine equipment can not be subject to too large vibrations.Because screen apparatus 40 is mounted on the brush rotating shaft 21 of cleaning brush 20, so the action of screen is the power not needing to use cleaning machine equipment 10 oneself.Transmission group 50 also has double-deck function simultaneously, that is: the power that cleaning brush 20 and screen apparatus 40 are provided.Operating characteristics, the reliability of said cleaning machine equipment 10 and cleaning effectiveness is each again can improve widely.
Fig. 4 a-Fig. 4 d is depicted as the side view that screen apparatus 40 on eccentric shaft 41 is arranged on the position profile in the brush rotating shaft of cleaning brush 20.Fig. 4 a shows the cutaway view of the position of screen apparatus 40 on difference 1/4th turns of eccentric shafts.Fig. 4 b shows the position of screen apparatus 40 on difference 1/2nd turns of eccentric shafts on Fig. 4 a.Fig. 4 c shows the position of screen apparatus 40 on difference 3/4ths turns of eccentric shafts on Fig. 4 a.Last Fig. 4 d shows the position of screen apparatus 40 on difference one turn of eccentric shaft on Fig. 4 a.
By intensity that screen apparatus 40 shakes can be adjusted to the selection of different eccentric degree rotating shaft with the cleaning of dirty forms different on tie surface and dirty degree.Can such as direct brush rotating shaft 21 on cleaning brush 20 perform eccentric adjustment.
Figure 5 shows that and can travel the stereogram of cleaning machine equipment oblique upper by hand push, wherein have a lid 11, there is opening in the place only on the both sides of cleaning brush 20, so that can the wheel disc of operation adjustment cleaning brush 20 height.Height Adjustment equipment is connected with the bottom supporting sled 60.
Lid 11 covers head roll simultaneously and also covers screen apparatus 40 and cleaning brush 20, and therefore generally speaking whole cleaning machine equipment 10 is very compact structures.This structure make the operating characteristics of this equipment and particularly reliability also highlight under very severe climate state.
Figure 6 shows that the three-dimensional exploded view of screen apparatus 40 oblique upper, wherein screen apparatus 40 includes one and is arranged on fixing screen 43 on screen support and an adjustable screen 44, can be adjusted the position of adjustable screen 44 by screw and cover system structure 46.Can by the rubbish of different size by dual screen, such as, inserts on artificial grass clearly separates and is sent back on straw skin.The distance between adjustable screen 44 and fixing screen 43 can be adjusted according to the amount of rubbish and its size thickness.So just can avoid the obstruction of two screens 43,44 sieve aperture.Screen support 45 can make imaging drawer and can release from cleaning machine equipment 10 like that to topple over collected next rubbish.
Fig. 7 a and Fig. 7 b is depicted as the detail section of fixing screen 43 and adjustable screen 44.Fig. 7 a is depicted as the amplification of adjustable screen 43 in Fig. 6 in screen apparatus and affiliated screen hole S thereof, is 4mm in the size of this sieve aperture.
Fig. 7 b is depicted as the amplification of adjustable screen 44 and the screen hole S belonging to it in Fig. 6.The sieve that this boring ratio fixes screen 43 is probably greater, and its size is 10mm.The screen hole S that this 2-3 is doubly large can make rubbish more effectively be separated in the granulated garbage of different size in screen apparatus 40.
The claim that this case proposes now and in the future will obtain not have precedent, further patent protection.
If again after sifting, particularly according to found that after the status of technology relevant at present examination, the technical characteristic of one of them or other be conducive to object of the present invention but not conclusive importance time, this feature just attempting statement now, can be rejected it by certainly from primary claim.Such subordinate's reasonable set should be contained by the explanation of subject application.
Note also at this, in various embodiments and in the present invention shown in figure various design and change thereof can at random be combined mutually.Wherein individual other or several technical characteristic also can be intercoursed arbitrarily, also disclose the various combinations of these features in subject application simultaneously.
Backtracking relation mentioned in each inter-related claim also has in the feature by each this subordinate's claim and describes the main body in other primary claim projects.
The technical characteristic of only setting forth at declaratives or in the claims carried separately indivedual but contain several feature technical characteristic can be seen as in the present invention the use be mainly used to as separating in this claim or other independently the status of technology of claim
If these technical characteristics and other technical characteristic are referred or therefore can obtain strong result because of its correlation.
Claims (10)
1. a cleaning machine equipment (10), espespecially can manually travel or can with a maintenance vehicles, the cleaning machine equipment (10) of large area or particularly artificial grass is cleaned in the confession be combined with each other as tractor, mowing trailer or district vehicles, it is characterized in that, its comprise a cleaning brush (20) and a head roll (30) and one be arranged between cleaning brush (20) and head roll 30, in order to collect the screen apparatus (40) of the rubbish swept into by cleaning brush institute; Cleaning brush (20) is connected by transmission group (50) and head roll (30); In use cleaning machine equipment (10), when head roll (30) is advanced on the ground that will clean, cleaning brush (20) can be driven rotation.
2. cleaning machine equipment (10) as claimed in claim 1, is characterized in that, before being installed in head roll (30) with direct of travel F cleaning brush (20) of cleaning machine equipment (10); The transmission group (50) of cleaning brush (20) is identical with the rotation direction U of head roll (30), or after being installed in head roll (30) with direct of travel F cleaning brush (20) of cleaning machine equipment (10), the transmission group (50) therefore cleaning brush (20) is contrary with the rotation direction U of head roll (30).
3. cleaning machine equipment (10) as claimed in claim 1 or 2, it is characterized in that, transmission group (50) can head roll (30) increase or reduce cleaning brush (20) speed and/or transmission group (50) by belt and/or refining bar (51), transmit power especially by least one relaying power transmission shaft (52).
4. cleaning machine equipment (10) as claimed in claim 1 or 2, it is characterized in that, screen apparatus (40) is arranged on cleaning brush (20) and/or head roll (30) by least one eccentric shaft (41); When axle rotates, screen apparatus (40) can be driven vibrations, and/or screen apparatus (40) is resiliently mounted on relative to head roll and/or cleaning brush (20) part; Especially can quaveringly be installed on a slat gum bar (42), and/or screen apparatus (40) comprises the adjustable screen (44) that a fixing screen (43) and can regulate different distance; Sieve aperture S the best of adjustable screen (44) is 2-3 times of fixing screen (43) sieve aperture S.
5. cleaning machine equipment (10) as claimed in claim 1 or 2, is characterized in that, supports sled (60) and is used to support cleaning machine equipment (10) on the ground that needs are clean; Support sled (60) to be mounted, and/or support sled (60) has one to guide sheet metal (61), and in order to be directed into by the rubbish material cleaned on brush (20), screen apparatus (40) is inner goes; Best mode be support sled (60) is arranged on the place relative with cleaning brush (20) and/or adjustable be perpendicular to head roll (30).
6. cleaning machine equipment (10) as claimed in claim 1 or 2, it is characterized in that, head roll (30) can be have rough cylinder, particularly can make the cylinder of surperficial spinosity.
7. cleaning machine equipment (10) as claimed in claim 1 or 2, is characterized in that, the length of head roll (30) is at least 25% of cleaning brush (20) length, and better person is 50% or 70%.
8. cleaning machine equipment (10) as claimed in claim 1 or 2, is characterized in that, head roll (30) and/or cleaning brush (20) at least respectively comprise two segment cylinder or part brush.
9. cleaning machine equipment (10) as claimed in claim 1 or 2, is characterized in that, the installation of cleaning brush (20) is parallel with the axis of head roll (30).
10. cleaning machine equipment (10) as claimed in claim 1 or 2, is characterized in that, the surface of cleaning brush (20) is come soft than the surface of head roll (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410674038.7A CN104641952A (en) | 2013-11-22 | 2014-11-21 | Cleaning Machine Device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE22013105324.4 | 2013-11-22 | ||
| CN201410674038.7A CN104641952A (en) | 2013-11-22 | 2014-11-21 | Cleaning Machine Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104641952A true CN104641952A (en) | 2015-05-27 |
Family
ID=53234014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410674038.7A Pending CN104641952A (en) | 2013-11-22 | 2014-11-21 | Cleaning Machine Device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104641952A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108742359A (en) * | 2018-08-17 | 2018-11-06 | 嘉兴杰创智能电器有限公司 | Drum-type burnisher and burnisher self-cleaning device |
| CN108755522A (en) * | 2018-03-20 | 2018-11-06 | 铜陵市兴达市政工程建设有限责任公司 | A kind of playground lawn rubbish pick-up unit |
| CN110573004A (en) * | 2017-02-23 | 2019-12-13 | 卡尔玛商业公司 | Device for cleaning artificial turf |
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| GB191300881A (en) * | 1912-01-19 | 1913-10-23 | Edmond Jacquelin | Improvements in Sweeping Machines. |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110573004A (en) * | 2017-02-23 | 2019-12-13 | 卡尔玛商业公司 | Device for cleaning artificial turf |
| CN108755522A (en) * | 2018-03-20 | 2018-11-06 | 铜陵市兴达市政工程建设有限责任公司 | A kind of playground lawn rubbish pick-up unit |
| CN108742359A (en) * | 2018-08-17 | 2018-11-06 | 嘉兴杰创智能电器有限公司 | Drum-type burnisher and burnisher self-cleaning device |
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Application publication date: 20150527 |
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