The present Application is a U.S. national stage of and claims priority to and the benefit of International Application No. PCT/SE2014/051060, filed on Sep. 15, 2014, which claims priority to Swedish Application No. 1351078-9, filed on Sep. 19, 2013. Both applications are incorporated herein by reference in their entireties.
The present invention refers to a mounting device for a drum in a shaft of a brush roller. Such brush rollers are used among others for cleaning of airfields and other similar larger areas.
The background of the invention can be obtained from the Swedish patent SE 521 363 and the corresponding U.S. Pat. No. 6,817,055 showing a method for mounting of a drum and a drum being a part of a shaft as a part of a brush roller. FIG. 5 of these publications shows mounting of two drum segments by a screw running radially through a clearance hole in an external shoulder and into a threaded hole of an internal shoulder. This coupling is a rigid and good coupling for connection of two neighbouring segments but it is hard and time consuming to fit the screw tight against the treaded hole of the internal shoulder during the mounting.
The purpose of the invention is to provide a mounting device allowing time saving when mounting of two adjacent segments of a drum in a shaft of a brush roller.
By the present invention as it appears from the independent claims the purposes mentioned above are met with, the disadvantages being eliminated. Suitable developments of the invention are described by the dependent claims.
The invention relates to a mounting device for a drum consisting of at least two joined drum segments as a part of a shaft of a brush roller. The mounting device includes an external circumferentially directed shoulder being a part of a first drum segment, and an internal circumferentially directed shoulder being a part of a second drum segment. The two shoulders are provided with cooperating contact surfaces mainly positioned in a circumferential or tangential direction with respect to a complete drum, the external shoulder is provided with a radial directed clearance hole intended to involve a screw, the threaded end of which being directed into the geometrical rotation axis of a complete drum. Said cooperating contact surfaces being “mainly positioned in a circumferential or tangential direction” involves for instance also combined plane cooperative surfaces together forming a ridge, preferably centrally positioned either on the exterior shoulder or on the interior shoulder, said ridge is cooperating with a corresponding valley at the opposite shoulder, each such cooperating surface being orientated tangentially to a complete drum, that is being orientated in a plane in parallel with a tangential plane of the drum. The interior circumferentially directed shoulder is provided with a recess having a bottom and an opening facing the geometrical rotation axis. The recess is designed with plain inner side surfaces facing each other and being parallel and axial with respect to the drum. Furthermore the recess is equipped with projections tangentially or circumferentially originating from each one of said side surfaces and pointing to each other. The drum segment is made of extruded aluminum and is in form of a double-walled construction to add to the stiffness in flexing of the complete drum, but at the same time being relatively light. By extruding the drum segment one obtains an equal cross-sectional profile along the whole drum segment, such that it is easy to obtain interruptions/openings in the recess by cut or mill off the projections of the recess or the side walls of the recess.
According to an embodiment of the invention the internal restriction surfaces of said projections are located at a radius ru being less than the radius R of the internal cylindrical surface of the drum segments.
According to an embodiment of the invention the bottom of the recess is located at a radius rb being less than the radius R of the internal cylindrical surface of the drum segments.
According to an embodiment of the invention a nut of said screw is axially displaceable but rotation locked located in the recess. By interruptions/openings in the recess the nut in an easy way can be moved to a suitable location at the radial directed hole to receive the screw.
According to an embodiment of the invention the nut is located between the side surfaces of the recess having a play between the respective side surface and the side of the nut. The purpose of the play is to offer an adjustment possibility when joining of two drum segments.
According to an embodiment of the invention each one of said shoulders has an extension along the whole length of the respective drum segment. This offers a simple injection moulding method of each drum segment.
According to an embodiment of the invention said recess has an extension along the whole axially length of the drum segment. This offers a simple injection moulding method of each drum segment too.
According to an embodiment of the invention all of the projections has an extension along the whole axially length of the drum segment. This offers a simple injection moulding method of each drum segment too.
The invention also relates to a drum segment for a drum as a part of a shaft of a brush roller. The drum segment is equipped with two or more, preferably four radial projecting beams forming U-shaped recesses between two adjacent beams, said recesses are designed to carry radial directed brushes. The drum segment includes a mounting device according to any one of the embodiments mentioned above, the external circumferentially directed shoulder being arranged along one edge of the drum segment and the internal circumferentially directed shoulder being arranged along the other edge of the drum segment.
The invention also relates to a drum being a part of a shaft of a brush roller. The drum consists of at least two drum segments, preferably four segments, each one defined according to the drum segment mentioned above.
Furthermore the invention relates to a brush roller equipped with radial directed brushes mounted on a drum according to what being mentioned above.
Now the invention will be described more in detail with reference to the schematic drawing figures.
Number | Date | Country | Kind |
---|---|---|---|
1351078 | Sep 2013 | SE | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/SE2014/051060 | 9/15/2014 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2015/041590 | 3/26/2015 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
1475074 | McLaughlin | Nov 1923 | A |
2736916 | Lombardi | Mar 1956 | A |
3533125 | White | Oct 1970 | A |
3862463 | Reiter | Jan 1975 | A |
3995346 | Grogan | Dec 1976 | A |
4018014 | Belanger | Apr 1977 | A |
5251355 | Drumm | Oct 1993 | A |
6279190 | Belanger | Aug 2001 | B1 |
6817055 | Ekholm | Nov 2004 | B1 |
8393044 | Favagrossa | Mar 2013 | B2 |
8495786 | Naftal | Jul 2013 | B2 |
8925136 | Huybreckx | Jan 2015 | B2 |
Number | Date | Country |
---|---|---|
2664250 | Nov 2013 | EP |
Entry |
---|
Written Opinion regarding International Application No. PCT/SE2014/051060, mail date May 12, 2014, 8 pages. |
Number | Date | Country | |
---|---|---|---|
20160227914 A1 | Aug 2016 | US |