| 1. | A combined scraping and sweeping machine c h a r a c t e r i z e d in that the sweeping unit comprises an endless belt with brushes mounted thereon and arranged so that the sweeping is transverse to the travelling direction. |
| 2. | A combined scraping and sweeping machine according to claim l c h a r a c t e r i z e d in that the scraping blade can be equiped with a wearing edge of different materials and that the sweeping unit can be mounted with brushes, flaps or showelε of different materials. |
| 3. | A combined scraping an sweeping machine according to claim 1 and 2 c h a r a c t e r ι z e d in that the scraping and sweeping unit can swing to both sides and that the rotation speed of the sweeping belt can be varied and the direction of the rotation be changed. |
| 4. | A combined scraping and sweeping machine according to claim 1, 2 and 3 c h a r a c t e r i z e d in that it is selfsupporting and movable in vertical direction in relation to the mounting be means of spherical bearings. |
This invention relates to a combined scraping and sweeping machine.
Scrabers and rotating brushes both self-driven and for mounting on a tractor and cars for cleaning of roads, sidewalks, squares etc. for snow, sand, grain etc. are generally known only with a single function. That means that either a scraper or a brush can be mounted and accordingly there could either be scraped or swept. This causes great inconvenience εt dismounting and mounting of equipment when change should be made from scraping to sweeping or vice versa.
However, a few combined scraping and sweeping machines are known where this mounting trouble is eliminated.
Common disadvantages for all known scraping and sweeping machines are however: that the functions can only be effected one at a time; that it is difficult and sometimes impossible to control the sweeping away of the material from the rotating brush; that existing mounting types are not flexible which causes great maintenance and repair costs .
The combined scraping and sweeping machine according to the invention is characterized m that it comprises a sweeping belt which is driven transversely of the travelling direction and which is mounted w th brush elements. The belt is mounted just behind t.-.= scraper, and due to the transverse movement the materii. s freely swept aside.
The sweeping belt is at top covered by a shield and in each end eσuiped with an adjustable spout.
The machine can be moved at an angle of approximately 25 to each side, and the speed of the belt can be varied and the direction of rotation of the belt can be changed.
The machine is self-bearing and can be moved freely in vertical direction in relation to the mounting by means of spherical bearings .
Accordingly a scraping and sweeping machine is achieved which conducts both scraping and sweeping at a time and thereby saves an operation r. relation to the machines known hitherto. The machine sweeps and delivers the material under full control and can conduct a predetermined finish and scrape and sweep to both sides in the same travelling direction. The machine is only minimally weared and not overloaded when driving or. rough ground.
A simple embodiment of the scraping and sweeping machine according to the invention is equipped with a steel blade scraper and a transverse rubber belt mounted with platic brushes .
It can, however, according to the invention be expedient tc use other construction materials due to the ground and the sweeping medium. The scraper can for example be equiped with a wearing edge of a different material, likewise the brush material can be of a different type and even be interchanged with shovels or flaps.
Sidewards and vertical positioning of the scraper and the sweeping belt can be done by .ydra iic cylinders . The belt prime mover can be a hydra l ' rctcr.
On the drawing is shown a cor r.ed scraping and sweeping machine accordinc to the mver.ticr., in which
Fig. 1 is a side cross section,
Fig. 2 is a cross section seen from above,
Fig. 3 is a front cross section,
Fig. 4 is a side cross section of a different embodiment of the machine, and
Fig. 5 shows the embodiment of the machine according tc F g. 4 seen directly from above .
A combined scraping and sweeping machine comprises mainly a frame 14, on which a rubber belt £ is mounted with combined brush and steel units 12 which car. be moved transversely to the travelling direction. Furthermore ahead of the scraping and sweeping machine a scraper blade 8 is mounted with a wearing edge, and which can be raised hydraulically 200 mm up and down independently of the sweeping unit. The shown embodiment has a pendulum system which is made in such a way that, at the bottom of the pendulum shaft, a spherical bearing 15 is mounted and at the top has an oval cutting which is adapted to the pendulum height. The machine itself has be means of a hydraulic cylinder a swinging possibility of approximately 25 .
The machine itself has a mounting which suits a standard A- frame system 3, but can moreover be adapted to all other mounting systems .
In the embodiment shown only _r^=r belt 6 and belt rollers 7 are used for mounting of tr.e sh unit 12, but there is not obstacles for using chair, wr.eels and chains, on which the brush sections are mounted. Besides there s nothinα to
prevent use of belts of synthetize materials such as PVC- aterialε instead of rubber belts. Furthermore there is no hindrance to use scraper sections made of polyesther materials, steel, rubber flaps, rubber shovels, steel blades, steel shovels or a combination thereof.
The embodiment of the machine shown on Fig. 4 and 5 in the drawing comprises a scraper blade 202 with a rubber edge 201 mounted to the lower edge of the blade by means of bolts. The scraper blade 202 is strenghtened by stiffening ribs 203 and mounted to the rest of the machine by a scraper frame 204, as it is fastened to a vertical raising and lowering cylinder (hydraulic cylinder) 205. This cylinder is with the cylinder housing placed moveable in a sliding bearing 206, which on its turn is fastened to a pendulum frame 207. The cylinder is with the end of the cylinder rod fixed to the lower horizontal part of the frame 207. When the cylinder is activated then the cylinder housing moves upwards and thereby raising the scraper blade. This movement is independent of other movements of the machine. The pendulum frame 207 can swing round a horizontal axis placed in the longitudinal direction of the machine. The scraper blade can thereby follow the roughness of the ground independent of the movements of the machine. As a limitation for the movements of the scraper blade stops 209 is placed which limit the movement of pendulum frame. The complete section with scraper blade can by means of a couple of bolts in the pendulum frame 207 be dismounted from the rest of the machine and be mounted directly on the mounting frame 221 for the vehicle. The scraper blade has moreover twc swing cylinders 228, by means of which the blade car. be placed at an oblique angle in relation to the travelling i_rectιon of the machine.
The brush section comprises a sweeping frame 216 with a bearinσ profile 23C . For beari.r cf the scraoer section the
brush section has a mounting frame 210. A driving shaft is placed in the longitudinal direction of the machine at each end supported by a bearing 211 and 216 and in the middle in connection with the bearing profile 230. The driving shaft is driven by a hydraulic motor. The driving shaft is bearing two V-belt gears which by a V-belt 214 drives an axle 215 mounted with V-belt gears for belts 225 equiped with brushes 204. There is a similar set of gears for the belts fixed on another axle in the opposite side of the machine. The tightening of the belt can be adjusted by means of the adjusting bolts 225.
It is understood that the sweeping unit can swing round the driving shaft so that the unit compensates for roughness of the ground independent of the movement of the scraper unit.
For mounting on a vehicle the machine has a so-called A- frame 217 with a top rod mounting 218 which is connected to the vehicle. Below the A-frame is equiped with a raising and lowering mounting 219 which in its turn is mounted on a vehicle frame 222 which is mounted under the vehicle. For adjusting the height of the machine above the ground there is a raising and lowering cylinder 221 and a height adjuster 223. By activating the cylinder 221 the frame 220 is raised and swings round its right end for raising the machine.
The reference numerals 26 and 2 ~: indicates a hole for an eye bolt and a reinforcement respectively.
It is understood that the scraper blade unit and the sweeping unit can swing independently round their longitudinal axis, likewise tr.e^ independent of each other can be raised from the ground .
A number of advantaαeε of the machine described could be
pointed out. Used to snow cleaning the machine both scrapes and sweepes the snow away m one working cycle. In this embodiment the wear of the machine is minimal as the scraper unit can be adjusted in a preset height above the ground whereby unnecessarily hard wear is avoided.
This embodiment can carry out a combined scrabing sweeping function, a sweeping function alone with the scraper blade in a raised position and a scrabing function alone with th sweeping unit in a raised poεtion, likewise one can turn the direction of the belt hydrauiically so that a sweeping function could be carried out either to the right or to th left of the travelling direction.
The construction of the machine is very rigid and compact and is therefore applicable fcr snow cleaning and other forms of cleaning sand, grain, animal foods, coal etc.
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