Drive means for conveyor belts, in particular of agricultural machines, and method for the production thereof

Abstract

A flat belt provides an endless traction suitable for conveyor belts, and has no fabric insert in the force transmission region. In some embodiment it has no fabric insert in the back of the belt. The flat belt is formed by a multistage method which includes forming a flat belt with a main body and endless tension member elements, by a rotary vulcanization process, and subsequently forming at least a part of the force transmission region on the flat belt. The flat belt may be used in agricultural machines which convey agricultural harvested material.

Claims

1. Flat endless belt, comprising: a length of at least 3 m, a main body comprising an endless tension member element formed from a multiplicity of tension members configured for transmitting tensile force in a running direction of the flat endless belt, wherein the flat endless belt has no fabric insert in a force transmission region wherein at least a part of the force transmission region, following vulcanization, is formed from the main body by a material-removing method.

2. The flat endless belt according to claim 1, wherein each of the multiplicity of tension members are formed from polyamide, polyester, aramid, carbon, glass, and/or steel.

3. The flat endless belt according to claim 1, wherein the main body consists of or comprises natural rubber, chloroprene rubber, styrene-butadiene rubber, ethylene propylene diene terpolymer rubber, alkylated chlorosulfonated polyethylene, or hydrated acrylonitrile butadiene rubber.

4. Agricultural machine having a conveying device designed to convey agricultural harvested material or having a pressing device designed to press agricultural harvested material, wherein the conveying device and/or the pressing device has at least one flat endless belt according to claim 1.

5. Flat endless belt according to claim 1, wherein the flat endless belt has no fabric insert in a back of the flat endless belt.

6. Flat endless belt according to claim 1, wherein the flat endless belt has no fabric insert in a base.

7. Method for producing a flat endless belt having a belt length of at least 3 meters, comprising a) forming a flat belt with a main body and an endless tension member element, present therein, by a rotary vulcanization process; and b) forming at least a part of a force transmission region on the flat belt obtained by the rotary vulcanization process according to step a), wherein the force transmission region is produced by at least partially forming a first traction profile and wherein in step b) material of a vulcanizate is removed.

8. The method according to claim 7, wherein the first traction profile is configured for absorbing a non-positive exertion of a driving force.

9. The method according to claim 7 wherein the flat belt formed in step a) is a final height of the flat belt.

Description

(1) The invention is explained in more detail in the following text with reference to the appended figures.

(2) FIG. 1A shows a thin flat belt 7 having tension members formed into a cord 8. The profiles can then be applied individually or as a profile chain to these thin flat belts 7 by way of suitable processes involving the addition of material. Corresponding profiles are illustrated in FIG. 2A and FIG. 2B.

(3) FIG. 1B shows a thick flat belt or full belt 6 having a centrally arranged cord 8. This full belt is suitable for further processing involving removal of material, in particular such that a profile is formed on both sides. Correspondingly formed profiles and intermediate stages thereof are illustrated in FIGS. 4 and 5 below.

(4) FIG. 2A shows two profile blocks 9 that are free of fabric inserts in the force transmission region 2, in the back 5 and in the base 3. These profile blocks are suitable for attachment to the thin flat belt 7, as illustrated in FIG. 3A.

(5) FIG. 2B shows a profile chain 10 with a plurality of teeth. Illustrated is the back, which is present in a manner free of a fabric insert in one embodiment according to the invention. The force transmission region 2, for example indicated by a tooth, is, according to the invention, likewise free of a fabric insert. The base 3 is likewise free of fabric in one environment.

(6) FIG. 3A illustrates a flat belt 7 according to the invention, to which a profile block 9 has been attached as a tooth 4 by application of material. The flat belt 1 according to the invention has a force transmission region 2, which, according to the invention, has no fabric insert, and the base 3, which is likewise free of a fabric insert in one embodiment.

(7) FIG. 3B shows the material application of a profile chain 10 to a thin flat belt 7.

(8) FIG. 4 shows an intermediate step in the production of a flat belt according to the invention on the basis of a full belt as shown in FIG. 1B. In this case, by way of a material removing process, such as grinding, milling or cutting, the tooth 4 is exposed from the full belt 6. In the present case, the flat belt 1 is profiled on both sides, wherein the tension members of the cord 8 are arranged centrally.

(9) Finally, FIG. 5 shows a flat belt according to the invention having the centrally arranged tension members, teeth as profiles, which are arranged on both sides, and the force transmission region 2 in the region of the tooth 4 and of the base 3.

(10) The flat belt according to the invention can form corresponding further embodiment configurations that are not explicitly illustrated in the figures.

LIST OF REFERENCE SIGNS

(11) 1Flat belt 2Force transmission region 3Base 4Tooth 5Back 6Flat belt, thick 7Flat belt, thin 8Cord 9 Profile block 10 Profile chain