WO1991014112A1 - A roller assembly - Google Patents

A roller assembly Download PDF

Info

Publication number
WO1991014112A1
WO1991014112A1 PCT/DK1991/000063 DK9100063W WO9114112A1 WO 1991014112 A1 WO1991014112 A1 WO 1991014112A1 DK 9100063 W DK9100063 W DK 9100063W WO 9114112 A1 WO9114112 A1 WO 9114112A1
Authority
WO
WIPO (PCT)
Prior art keywords
rollers
roller
gear wheels
teeth
gear
Prior art date
Application number
PCT/DK1991/000063
Other languages
French (fr)
Inventor
Georg Lauritzen
Original Assignee
Maskinfabriken Taarup A/S
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DK0588/90 priority Critical
Priority to DK58890A priority patent/DK58890A/en
Application filed by Maskinfabriken Taarup A/S filed Critical Maskinfabriken Taarup A/S
Publication of WO1991014112A1 publication Critical patent/WO1991014112A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B3/00Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
    • B30B3/04Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D82/00Crop conditioners, i.e. machines for crushing or bruising stalks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/02Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/24Toothed gearings for conveying rotary motion without gears having orbital motion involving gears essentially having intermeshing elements other than involute or cycloidal teeth

Abstract

In a roller device, preferably having crimper rollers for agricultural machinery, where one of the rollers (16) is movable with respect to the other (17) and where the rotation of the rollers is synchronized by means of a gear wheel mechanism (10-13), this mechanism in a preferred embodiment is provided with two pairs of coarse gear wheels, the gear wheels (10 and 11) in each pair being coaxial and firmly interconnected as well as angularly displaced 180° divided by the number of teeth, corresponding to one half tooth pitch, relative to each other. Such a mechanism ensures the maintaining of correct engagement of the rollers, also if they are pressed apart by passing material agglomerations.

Description

A Roller Assembly
The invention relates to a roller device of the kind stated in the introductory portion of claim 1.
The synchronized rollers may e.g. be such crimper rollers which are used in many agricultural machines and which may be equipped with longitudinal rubber edges which in operation intermesh without touching. The deep toothing and the coarse gear wheels ensure that the rollers can be lifted suitably from each other while the gear wheels are still correctly intermeshed. In such cases where the rollers are lifted out of engagement by a large material lump they must be steered back into engagement without causing damage.
In practice, use is e.g. made of rollers with five rubber edges and correspondingly gear wheels with five teeth. However, due to the polygon effect, gear wheels that coarse periodically are not in sufficiently firm engage¬ ment to ensure that the rollers are not damaged in the given situation.
It is the object of the invention to provide a roller device of the kind ensuring that the rollers pass into correct engagement with each other without risk of damage after having been forced so far apart by material lumps that they have passed out of engagement.
The object is achieved by the roller device being designed as stated in the characterizing portion of claim 1, in that by such a construction an engagement is obtained which is similar to the one obtained by using single gear wheels having the same number of teeth as in the set according to the invention while maintaining the freedom of movement of the gear wheel axes relative to each other which is made possible by the large tooth height.
The angular displacement can be as stated in claim 2 corresponding to 1/n of the tooth pitch.
For most practical purposes each set may suitably comprise two gear wheels as stated in claim 3.
The relative axial disposition of the gear wheels in a set is not decisive; but in practice it is often expedient that the gear wheels are positioned close to each other as stated in claim 4.
In the following the invention will be explained in more detail, reference being made to the drawing in which
Fig. 1 shows a side view of the one pair of gear wheels in one embodiment of the roller device according to the invention with two gear wheels in each set,
Fig. 2 shows a section along the line A-A in fig. 1,
Fig. 3 shows a perspective view of one end of the roller device, and
Fig. 4 shows the two rollers seen from one end.
In the drawing 10 and 11 are two gear wheels which as shown at 12 are welded firmly onto each side of a spacer ring 13 displaced one half tooth pitch corresponding to an angular displacement of 360°/2z, where z is the number of teeth, here five. This gear wheel pair and the second gear wheel pair cooperating therewith are, as shown in fig. 3, positioned on the end of each separate one of a pair of cooperating crimper rollers 15 and 16. As also shown in fig. 4 these crimper rollers are each equipped with a number of longitudinal edges 18 of rubber or a like resilient material corresponding to the number of teeth on each of the gear wheels 10 and 11, i.e. in the present case five. These edges may be attached to the rollers in an arbitrary suitable way, e.g. by means of bolts. The roller shafts rest in two end plates one of which 19 is shown in fig. 3. The lower roller 17 is in a conventional manner provided with stationary axis, while the shaft of the upper roller 16 is movable at both ends in a slit 20 and being influenced by a spring 21 to abut against the bottom of the slit, in which position the rubber edges of the two rollers intermesh as shown in fig. 4. The gear wheels must synchronize the rotary movements of the rollers in such a way that the rubber edges do not get into contact, which would expose them to risk of damage. As such crimper rollers are often pressed rather far apart by passing material lumps against the effect of the springs 23, the gear wheels must, as in the case shown with five tooth, necessarily have coarse teeth, i.e. large tooth height and correspondingly large tooth pitch. This, if as in the usual way only one gear wheel was provided on each roller, would give the teeth on the two wheels so great freedom of movement relative to each other when the rollers and consequently the gear wheels are pressed apart, that the desired safeguard against contact between the roller edges is not achieved. However, when there are two gear wheels being firmly attached to each other and displaced by one half tooth pitch or in the case shown 180°/5 = 36° relative to each other, on each crimper roller, the same effect is obtained as with single gear wheel having double the number of teeth, i.e. in this case ten teeth. Such gear wheel pairs cannot assume relative positions in which the two crimper rollers are in mutual contact. Both the gear wheels 10 and 11 and the spacer ring 13 are provided with inwardly directed, radial protrusions 15 contemplated for cooperation with outwardly directed, radial protrusions on a not shown central means being attached to the crimper roller or its shaft through rubber elements not shown acting as shock absorbers.
The details of the shown and described roller device can be changed in various ways within the scope of the invention. E.g. the two gear wheels must not necessarily be positioned close to each other, but merely have to be secured against rotation relative to each other. Further¬ more, both the number of gear wheels in each set and the number of teeth on each gear wheel are variable.

Claims

C l a i m s
1. A roller device, preferably crimper rollers for agricultural machinery, comprising two rollers provided with longitudinal edges, said rollers being so embedded that at least one of the roller axes is free to move substantially in the plane defined by the two roller axes relative to the second roller axis, and being synchronized by means of a gear wheel mechanism with coarse teeth, c h a r a c t e r i z e d in that this gear wheel mechanism comprises two sets of gear wheels, the gear wheels in each set being coaxial and firmly interconnected as well as angularly displaced relative to each other.
2. A roller device according to claim 1, c h a r a c ¬ t e r i z e d in that the angular displacement between the gear wheels in each set is 360°/n'z, n being the number of gear wheels in each set and z being the number of teeth.
3. A roller device according to claim 2, c h a r a c ¬ t e r i z e d in that the teeth on the two gear wheels are displaced one half tooth pitch relative to each other.
4. A roller device according to claim 1, 2 or 3, c h a r a c t e r i z e d in that the gear wheels in each set are positioned close to each other.
PCT/DK1991/000063 1990-03-07 1991-03-06 A roller assembly WO1991014112A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK0588/90 1990-03-07
DK58890A DK58890A (en) 1990-03-07 1990-03-07 GEAR MECHANISM

Publications (1)

Publication Number Publication Date
WO1991014112A1 true WO1991014112A1 (en) 1991-09-19

Family

ID=8095265

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1991/000063 WO1991014112A1 (en) 1990-03-07 1991-03-06 A roller assembly

Country Status (6)

Country Link
EP (1) EP0518991A1 (en)
JP (1) JPH05505018A (en)
AU (1) AU7486891A (en)
CA (1) CA2076684A1 (en)
DK (1) DK58890A (en)
WO (1) WO1991014112A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704429A (en) * 1951-08-18 1955-03-22 Int Harvester Co Harvesting machine having crushing rolls
US2862400A (en) * 1957-03-19 1958-12-02 D Angelo Joseph Gear
US2954656A (en) * 1958-12-29 1960-10-04 Sperry Rand Corp Hay crimper
US3299801A (en) * 1964-11-28 1967-01-24 Deritend Eng Co Apparatus for treating blanks or webs of material
US3448684A (en) * 1966-03-31 1969-06-10 Gillette France Rotary cutting device
US4035991A (en) * 1975-02-28 1977-07-19 Multinorm, B.V. Device for mowing and subsequently crushing crop

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704429A (en) * 1951-08-18 1955-03-22 Int Harvester Co Harvesting machine having crushing rolls
US2862400A (en) * 1957-03-19 1958-12-02 D Angelo Joseph Gear
US2954656A (en) * 1958-12-29 1960-10-04 Sperry Rand Corp Hay crimper
US3299801A (en) * 1964-11-28 1967-01-24 Deritend Eng Co Apparatus for treating blanks or webs of material
US3448684A (en) * 1966-03-31 1969-06-10 Gillette France Rotary cutting device
US4035991A (en) * 1975-02-28 1977-07-19 Multinorm, B.V. Device for mowing and subsequently crushing crop

Also Published As

Publication number Publication date
AU7486891A (en) 1991-10-10
EP0518991A1 (en) 1992-12-23
DK58890A (en) 1991-09-08
CA2076684A1 (en) 1991-09-08
JPH05505018A (en) 1993-07-29
DK58890D0 (en) 1990-03-07

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