Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
  • A01B29/00—Rollers
  • A01B29/04—Rollers with non-smooth surface formed of rotatably-mounted rings or discs or with projections or ribs on the roller body; Land packers
  • A01B29/041—Rollers with non-smooth surface formed of rotatably-mounted rings or discs or with projections or ribs on the roller body; Land packers of "Cambridge"-type, i.e. the soil-pressing rings being stacked on a shaft
  • A01B29/043—Tire-packers

Definitions

• the present invention relates to a soilgoing roller for agricultural machine comprising a cylinder body, which on its exterior is covered with a flexible and resilient material.
• rollers in various forms have been used since ancient times on agricultural machines.
• the aim of such rollers is usually to recompact the soil after previous soil tillage or after sowing.
• the roller was made from a log, later ring rollers with precast rings became common with industrial and agricultural development.
• Today such rollers are manufactured from a range of different materials, such as forged and hardened steel rings, rings of rubber and various plastic materials.
• Rollers of the above mentioned type can also be used to press down stones so that these do not enter the combine harvester during harvesting.
• the present invention aims to achieve a roller of the initially described type that is simpler and cheaper to manufacture than the known roller, through which the benefit of an exterior covering in rubber or rubber-like material can be retained.
• a soilgoing roller for agricultural machine comprising a cylinder body, which on its exterior is covered with a flexible and resilient material, characterised in that the covering material
• the 15 comprises an elongated string of material which in a plurality of turns is spirally wound around the periphery of the cylinder body and which in at least both of its ends is fastened to the cylinder body.
• the elongated string of material which can suitably be comprised of an extruded rubber profile, can be manufactured in great lengths and then divided up into individual strings fitting a certain dimension of
• the covering material comprises a single string of 25 material.
• the covering material comprises two or more elongated strings of material, which run beside each other from one end of the cylinder body to its other end.
• each elongated string of material can have a base portion with a planar surface on the side facing the peripheral surface of the cylinder body and a portion protruding from the base portion, which at least in its outermost part has lesser width than the base portion. This is suitably achieved through one or more protruding portions protruding from the base portion.
• Each string of material is preferably hollow within the area of each protruding portion.
• the elongated strings of material can advantageously comprise along their length one or more reinforcing elements of flexible material, which extend in longitudinal channels in the strings of material and which have a higher durability than the flexible and resilient material in the strings of material.
• Such reinforcement elements of flexible material extend beyond both ends of the strings of material and are fastened to the cylinder body and members for tightening the reinforcement elements are preferably arranged at at least one of these fastenings to the cylinder body.
• the invention also refers to an agricultural machine comprising at least one such soilgoing roller, characterised in that it comprises a device for braking the roller.
• a machine can also comprise a driving device for the roller.
• a scraper is suitably arranged on the machine to remove soil and similar from the roller.
• Figure 1 shows schematically a perspective view diagonally from the rear of an agricultural machine provided with a roller according to a first preferred embodiment of the invention
• Figure 2 shows a view from above and partly in cross-section of the roller in the agricultural machine according to Figure 1 provided with a scraper
• Figure 3 shows schematically a side view of a spring arrangement for tightening the ends of wires in two elongated rubber profiles, which are spirally wound beside each other on a roller according to a second embodiment
• Figure 4 shows schematically an end portion of a roller according to a third embodiment, in which the ends of wires in two elongated rubber profiles are anchored on the inside of the cylinder body of the roller,
• Figure 5 shows schematically a tightening device according to a fourth embodiment with an end plate, which allows incorporation of a brake drum or a driving motor,
• Figure 6 shows schematically an end portion of a roller according to a fifth embodiment, in which wires are fastened on the inside of the cylinder body and an end plate is adapted for incorporation of a brake drum or a driving motor,
• Figure 7 shows schematically a side view of a roller according to a further embodiment and a scraper in a working position
• Figure 8 shows schematically a wire end and its connection to a spring
• FIGS 9 and 10 show cross-sectional views of two different rubber profiles. DESCRIPTION OF EMBODIMENTS
• Figure 1 shows schematically a perspective view diagonally from the rear of an agricultural machine 2 provided with a soilgoing roller 1 according to a first preferred embodiment of the invention.
• the agricultural machine is comprised in this case of a cultivator but the roller 1 can advantageously also be used at other types of agricultural machines.
• the roller 1 is rotatably supported on a rear frame beam 3 at the agricultural machine 1.
• the roller 1 consists mainly of a cylinder body 4, on the cylinder surface of which an elongated profile 5 of rubber or other flexible and resilient material has been spirally wound, whereby the edges of the rubber body abut each other in each spiral turn of the rubber body 5.
• Fig. 2 shows a view from above of the roller 1 and a scraper 6.
• Figure 2 is partly cross-sectional in the ends of the roller 1 to show that the profile is hollow, i.e. it comprises a longitudinal channel 7, which extends between the ends of the elongated rubber profile.
• Such a void 7 can be necessary to reduce heat build-up due to inner friction during driving on hard surfaces, such as roads.
• the roller 1 is manufactured through a rubber profile being manufactured in great lengths, which can be several hundred metres. Manufacturing can occur through extrusion or by another suitable method with a high degree of automation. The extruded product is then cut into suitable lengths so that it can be wound spirally in a plurality of turns about a pipe body so as to cover its peripheral surface or cylinder body.
• one or more wires or bands of steel or other durable material can be vulcanised- in during manufacturing of the profile.
• that part of these reinforcing elements that shall extend beyond the ends of the rubber profile is freed to allow fastening of the reinforcing elements to the underlying pipe body.
• reinforcing material can instead or also be mixed into the rubber mass.
• rubber profiles with such reinforcing elements or rubber bodies without such reinforcing elements can be glued or vulcanised fast on the pipe body.
• FIG 2 also shows a scraper 6, which consists of a beam 8, which on its underside comprises a row of scraper elements 9, which are rotatably attached to the beam 8.
• the beam 8 is in its turn supported via suitable arms by the beam 3, which carries the roller 1.
• the scraper elements 9 have nearly the form of a five- point star with five scraper rods 10, which extend radially from a central hub.
• the rubber profile has a protruding part 11 , which has lesser width than the base of the rubber profile, which means that the protruding parts 11 of the spirally wound rubber profile act as the threads of a standing screw.
• a scraper rod 10 interacts with each such thread in the roller 1.
• the beam 8 that bears the scraper elements 9 is suitably formed so that it can be swung aside or displaced in some other way from interacting with the threads in the roller 1 in dry conditions or when driving on roads in order to prevent unnecessary wear.
• the scraper elements 9 can for example be manufactured of steel plate, forged material or plastic. The number of scraper rods and the dimensions of these are dependent on the dimensions of the rubber profile and the pitch of thread in the spirally wound rubber profile.
• the scraper elements 9 can of course have a different shape than star- shaped, e.g. cogwheel-shaped with the number of cogs adapted to the threads in the roller.
• Figures 1 and 2 show a roller 1, at which a rubber profile is wound on a pipe body 4.
• a roller at which a rubber profile is wound on a pipe body 4.
• the profile then has a phasing off of a full turn to be finished off perfectly.
• An easy way to make the angle greater in such a rubber profile is to wind the roller with two profiles lying beside each other, whereby the problem is halved. It is also possible to use three or more parallel profiles.
• Fig. 3 shows schematically a side view of a spring arrangement for tightening the ends of wires 11,12 in two elongated rubber profiles 13,14, which are spirally wound beside each other on a roller according to a second embodiment.
• Each rubber profile 13,14 contains two wires 11,12, which with freed ends extend from the ends of the rubber profiles.
• the freed ends of the wires have been formed into loops, through which hooks on the springs 15 are passed.
• the springs 15 are themselves in a suitable way fastened in the end of the pipe body 16 so that the wires are subjected to tensile stress.
• the wires can be fastened in a similar way or be rigidly fixed.
• Figure 4 shows schematically an end portion of a roller 17 according to a third embodiment, in which the ends of wires 18, 19 of two elongated rubber profiles 20,21 are anchored on the inside of the cylinder body of the roller 17.
• the wires 18,19 extend through holes 20,21 created in the cylinder body.
• Figure 4 also shows parts of a scraper 6 in the displaced position.
• Figure 5 shows schematically a tightening device for the ends of wires 22,23 in a rubber profile 24, which ends are anchored on the inside of the cylinder body 26 of the roller 25 according to a fourth embodiment with an end plate 27, which allows incorporation of a brake drum or a driving motor.
• the pipe body is usually empty, which means that the springs can be fastened at any chosen place on the inside of the pipe body.
• Figure 6 shows schematically an end portion of a roller 29 according to a fifth embodiment, in which two wires 30,31 are fastened on the inside of the cylinder body 32 and an end plate 33 is adapted for incorporation of a brake drum or a driving motor.
• Figure 7 shows schematically a side view of a roller 34 according to a further embodiment, in which two wires 35,36 are fastened via springs 37 to shackles 39 on the pipe body 38. To allow for adjustment of the spring power the shackles 39 can be displaceable or also more shackles can be arranged.
• Figure 7 shows a scraper 6 with the scraper rods engaged in the thread grooves in the roller 34.
• Figure 8 shows schematically a wire end 40 and its connection 41 to a spring 42.
• the connection 41 is comprised of a cable clamp with a ring-shaped end, which allows hooking in of the spring 42.
• Figures 9 and 10 show cross-sectional views of two different rubber profiles 43 and 44 respectively.
• the rubber profile 43 has a base portion 45, which has a planar under surface for abutting at the cylinder surface of a pipe body, and a protruding central part 46, which protrudes narrowing upwards from the base part.
• the profile 43 has a channel 47 within the area of the protruding part.
• the rubber profile is as mentioned previously suitably provided with reinforcing elements 48 that extend longitudinally through the entire rubber profile.
• the rubber profile 44 shown in Figure 10 differs from the body shown in Figure 9 mainly only through it having two protruding parts 49, which protrude upwards from a base part 50.
• the string of material does not have to have a planar surface facing the cylinder body even though this is preferable and instead the surface can be curved.
• the mentioned surface can have a central recess or a plurality of recesses.
• the ends of the wires can be provided with protection against wear and abrasion, for example through a suitable pipe sheath of soft-annealed steel.
• the holes in the pipe body for the wires to pass through can be covered or lined in some other way so as to reduce wear on the wires. In addition such holes can be created at an angle so that the wires do not have to be bent over sharp edges.
• the hollow rubber profile within the area of the protruding parts can be filled with matter with different characteristics than the surrounding rubber. It is also conceivable to allow the void to be pressurised so as to provide the roller with more tyre-like characteristics. With such an embodiment the plugs or similar that are required for airtight closing of the ends of this void can be provided with valves that permit refilling of air into the void. Tightening devices other than springs can be used, such as hydraulic cylinders, pneumatic cylinders or manual tightening devices, such as rigging screws. It is also conceivable to combine springs with manual tightening devices, e.g. rigging screws. In addition, the wire fastening can be variable and combined with a tightening device, e.g. of the type oldfashioned ski binding, possibly combined with a spring. The present invention shall therefore only be limited by the content of the enclosed patent claims.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Soil Sciences (AREA)
• Environmental Sciences (AREA)
• Soil Working Implements (AREA)
• Protection Of Plants (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=38625286

Family Applications (1)

Country Status (3)

Families Citing this family (6)

Citations (5)

Family Cites Families (4)

• 2006
  • 2006-04-20 SE SE0600865A patent/SE0600865L/xx not_active IP Right Cessation
• 2007
  • 2007-04-13 WO PCT/SE2007/050243 patent/WO2007123479A1/en active Application Filing
  • 2007-04-13 EP EP07748404A patent/EP2007188A4/de not_active Withdrawn

Patent Citations (5)

Non-Patent Citations (1)

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