BE1024614B1 - Scrapers of an intake and infeed unit of a forage harvester - Google Patents

Abstract

Scraper (1) of an infeed unit of a forage harvester, wherein the same consists of several parts of a metallic base body (3) with a first wear resistance, over which the scraper on the infeed is mountable, and from a metallic stripper body (4) attached to the base body (3) compared to the first wear resistance higher, second wear resistance over which crop is strippable from a roll of the intake, consists, wherein the base body (3) and the stripping body (4) are welded together.

Description

(30) Priority information:

31/05/2016 DE 102016109991.0 (73) holder:

CLAAS SAULGAU GmbH 88348, BAD SAULGAU Germany (72) Inventor:

KLOTZ Manfred

88605 SAULDORF-BIETINGEN Germany (54) scraper of an infeed unit and infeed unit of a forage harvester (57) scraper (1) of an infeed unit of a forage harvester, the same consisting of several parts from a metallic base body (3) with a first wear resistance, via which the scraper can be mounted on the infeed unit and consists of a metallic scraper body (4) fastened to the base body (3) with a higher, second wear resistance compared to the first wear resistance, via which crop material can be scraped off a roller of the feed mechanism, the base body (3) and the scraper body (4) are welded together.

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BELGIAN INVENTION PATENT

FÖD Wirtschaft, K.M.B., Mittelstand & publication number: 1024614 Energy filing number: BE2017 / 5282

Office of Intellectual Property Boarding. Classification: A01F 29/09 A01F 29/10

Issued on: 02/05/2018

The Minister for Enterprise

Due to the Paris Treaty of March 20, 1883 for the protection of industrial property;

Introduced under the Act of March 28, 1984 on Inventive Patents, Article 22, for applications prior to September 22, 2014;

Based on Title I “Invention Patents” of Book XI of the Economic Code, Article XI.24, introduced for applications from September 22, 2014;

Based on the royal decree of December 2, 1986 on the registration, granting and maintenance of patents for invention, Article 28;

Recorded on 21/04/2017 at the Intellectual Property Office based on the protocol.

Considering that for patent applications that fall within the scope of Title 1, Book XI, of the Economic Code, in accordance with Article XI.19, Section 4, second paragraph, of the Economic Code, if the patent application is the subject of a search report in which a lack of unity of invention within the meaning of paragraph 1 is mentioned, and if the applicant does not limit his application and does not file a divisional application in accordance with the search report, the granted patent will be limited to the claims for which the search report was created.

DECIDES:

Article 1. - An invention patent is granted to:

CLAAS SAULGAU GmbH, Zeppelinstrasse 2, 88348 BAD SAULGAU Germany;

represented by :

GEVERS PATENTS, Holidaystraat 5, 1831, DIEGEM;

for a period of 20 years, subject to the payment of the annual patent fees mentioned in Article XI.48, §1 of the Economic Code, for: scrapers of a feeder and a forage harvester.

INVENTOR:

KLOTZ Manfred, Heudorfer Weg 12, 88605, SAULDORF-BIETINGEN;

PRIORITIES) :

31/05/2016 DE 102016109991.0;

SEPARATION:

Partial application of the previous application: Date of filing of the previous application:

Article 2. - This patent is granted without any prior examination of the patentability of the invention, without guaranteeing the merit of the invention or the accuracy of its description, and at the own risk of the patent applicant (s).

Brussels, 02/05/2018, in special representation:

BE2017 / 5282

Scraper of a feed unit and feed unit of a forage harvester

The invention relates to a scraper of a forage harvester of a forage harvester.

Furthermore, the invention relates to a feed mechanism of a forage harvester.

From DE 196 51 694 A1 the basic structure of a feed mechanism as well as a chopping mechanism of a forage harvester is known. When viewed in the direction of crop flow, the feed mechanism is positioned in front of the chopper, the feed mechanism comprising a pair of feed rollers consisting of two feed rollers arranged one above the other and a pair of feed rollers consisting of two feed rollers arranged one above the other. The pre-press rollers of the pair of pre-press rollers are arranged behind the feed rollers of the pair of intake rollers, as seen in the crop flow direction, a wiper interacting with the lower pre-press roller, via which crop can be stripped from the lower pre-press roller. The wiper is designed according to the prior art as a one-piece component.

Wipers known from the prior art are designed as a cast construction and are made continuously from one and the same material. A material with high wear resistance is used. If the scraper is defective, the entire scraper must be replaced. This causes high costs.

There is a need to manufacture a wiper of a feed mechanism more cost-effectively and thus also to manufacture the feed mechanism as such more economically.

Proceeding from this, the present invention is based on the object of creating a new type of scraper for a forage harvester of a forage harvester and a infeed unit with such a scraper.

This object is achieved by a stripper of a feeder of a forage harvester according to claim 1.

The stripper according to the invention is constructed in several parts from a metallic base body and a metallic stripper body. About the metallic

The main body of the scraper can be mounted on a feed mechanism. The metallic

Base body has a first wear resistance. About the metallic

BE2017 / 5282

Scraper body can be stripped crop from a roller of the feed unit. The metallic wiper body has a higher, second wear resistance than the first wear resistance. The base body and the scraper body are welded together.

The scraper according to the invention accordingly has two bodies which are connected to one another by welding, namely the base body and the scraper body. The basic body consists of a metallic material with an initial wear resistance. The scraper body connected to the base body by welding consists of a metallic material with a wear resistance that is higher than the first wear resistance.

The scraper according to the invention has the advantage over the scraper known from the prior art that it is less expensive.

The scraper does not have to be made entirely of a highly wear-resistant material, but only in the area of its scraper body, which is used to scrap the crop off a roller of the infeed unit. The base body carrying the wiper body can be manufactured from a less expensive metallic material with less wear resistance. Should the scraper wear out in the area of its scraper body, the scraper can be repaired by removing a worn scraper body from the

Base body removed and replaced with a new wiper.

The welding of the base body and the scraper body has the advantage that no screws or the like can get into the area of the crop.

The metallic base body is preferably made of structural steel or cast iron.

The metallic wiper body is preferably made of tool steel or an abrasion-resistant steel. Metallic materials of this type for the base body and wiper body are particularly preferred.

According to an advantageous development of the invention, the base body and the scraper body are provided with a hole weld and / or a fillet weld

BE2017 / 5282 welded to each other. Such a welded connection between the base body and the scraper body is particularly preferred.

According to an advantageous development, the base body and the wiper body are additionally screwed to one another, namely on the side, outside one

End sections lying in good flow. The screwing of the base body and the scraper body in the area of their end sections lying outside the crop flow is optional. Since these end sections lie outside the crop flow, it is avoided that a screw gets into the crop flow if the screw connection fails.

The feed mechanism according to the invention is defined in claim 9.

Preferred developments of the invention result from the subclaims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being restricted to this.

It shows:

1 shows a detail from a feed unit of a forage harvester in the area of a scraper. and

Fig. 2 is a perspective view of the scraper.

The present invention relates to a scraper for a forage harvester feeder and a forage harvester feeder with such an Ab20 scraper.

1 shows a section of a feed mechanism of a forage harvester in the area of a scraper 1 and a roller 2 of the feed mechanism interacting with the scraper 1. The roller shown in FIG. 1 is a lower pre-compression roller of a pair of pre-compression rollers, which, viewed in the direction of crop flow, is arranged behind a pair of intake rollers consisting of two intake rollers arranged one above the other.

Seen in the direction of crop flow, behind the pair of pre-press rollers and thus behind the lower pre-press roller 2 shown in FIG. 1, the stripper 1 is arranged

BE2017 / 5282 cooperates with the lower pre-compression roller 2 and can strip off the crop.

The scraper 1 is constructed in several parts. The wiper 1 has a metallic base body 3 and one with the metallic base body 3

Welding connected metallic scrapers 4.

The metallic base body 3 has a material with a first wear resistance.

The scraper body 4 has a material made of a second wear resistance that is greater than the first wear resistance of the metallic one

Material of the base body 3.

The main body 3 serves primarily to mount the scraper 1 on the feed mechanism. 1, 2 shows a section 5 of the base body 3, via which the same can be mounted on the feed mechanism. Above this section 5 of the base body 3 is a section 6 of the same, on which the wiper body

4 is connected by welding.

The section 6 of the base body 3 preferably has an exactly flat surface in the contact area with the wiper body 4. This exactly flat surface can, for example, by a - z. B. machining - post-processing can be provided, whereby any manufacturing inaccuracies, such as welding 20 distortion, can be compensated.

The metallic base body 3 of the scraper 1, that is to say the two sections 5 and 6 of the same, is preferably made of structural steel or cast iron.

The metallic wiper body 4 of the wiper 1 preferably consists of tool steel or an abrasion-resistant steel, such as an abrasion-resistant steel sheet, in particular a steel sheet which is sold under the product name Hardox.

As already stated, the metallic base body 3 and the metallic one

Scraper body 4 welded together. This is preferably done using a

BE2017 / 5282

Hole welding at the welding points 7 shown in FIG. 2. Additionally or alternatively, the metallic base body 3 and the stripping body 4 can also be connected to one another via a fillet weld 10.

The welding of the base body 3 and the scraper body 4 ensures a secure

Connection of the two bodies 3, 4 of the scraper 1. Screw connections that are in the crop flow are dispensed with. This has the advantage that no screws or other assemblies of a possibly failing screw connection can get into the crop.

In addition to welding the base body 3 and the scraper body 4 to Ab10, which lie within the crop flow, the base body 3 and the scraper body 4 can be screwed to one another, namely on lateral end sections 8 of the same that lie outside the crop flow.

According to the invention, the scraper 1 therefore consists of two bodies which are made of different materials, namely the metallic base body

3 with the first wear resistance and the metallic wiper body 4 with the second, higher wear resistance, both bodies, that is to say the base body 3 and wiper body 4, being welded to one another.

The scraper body 4 preferably consists of an abrasion-resistant steel sheet. Only in the area of the wiper body 4 is the wiper 1 made of such a highly abrasion-resistant and therefore expensive material. In the area of the base body 3 carrying the wiper body 4, a cheaper material with less wear resistance is used.

As already stated, base body 3 and wiper body 4 are connected to one another by welding. If the wiper body 4 wears, the weld connection can be released and the worn wiper body 4 can be replaced by a new wiper body and can be connected to the base body 3 again by welding.

The connection of the base body 3 and the scraper body 4 of the scraper 1 in the area of the crop flow takes place exclusively by welding. On the side

End sections of base body 3 and wiper body 4 outside the Gut6

BE2017 / 5282 flow, the base body 3 and wiper body 4 can also be screwed on.

The base body 3 and the stripping body 4 are preferably welded by means of a hole weld. For this purpose, holes are then formed in the area of the scraper body 4 at the later locations of the welded connections 7, via which holes the two bodies 3, 4 are welded while filling the holes with material.

The connection of the base body 3 and the scraper body 4 via a hole weld is preferred in order to connect the two bodies 3, 4 with one another with as little distortion as possible.

The scraper body 4 has a tip 9, which serves to scrape the crop from the roller 2. With this tip 9, the scraper body 4 protrudes in relation to the section 6 of the base body 3 in the direction of the roller 2. The tip 9 is contoured in a cross-section.

The surface of the scraper body 4 coming into contact with the crop can additionally be coated with a wear protection layer.

A very thin wiper body 4 can be particularly advantageously provided on a wiper 1 according to the invention. For example, a wiper body 4 can consist of a thin, flexible, wear-resistant sheet. This flexible sheet can first be clamped with a clamping device onto the exactly flat surface of section 6 of base body 3, whereby it assumes the exactly flat shape of section 6. Then, the scraper body 4, consisting of thin, flexible and wear-resistant sheet metal, can be connected to the base body 3 by one or more welded connections 7, 10. After loosening the tensioning device, the thin, flexible sheet metal or the stripping body 4 maintains the exact flat shape of the base body 3 due to the fixation on the base body 3.

A wiping body 4 screwed to the base body over its longitudinal extent, on the other hand, would have to have a much greater thickness, since this would either have to receive the screw heads in a depression or one would extend7

BE2017 / 5282 should allow appropriate thread length to ensure at least the minimum requirements for a fixed screw connection. Given the expected load, several screws with a nominal thread diameter of size M8 would have to be provided. These should have a screw-in depth of at least 8 millimeters on the wiper body. Accordingly, the wiper body would have to be at least 8 millimeters thick in order to meet the minimum requirements for a secure screw connection. Due to the strains on the scraper body - particularly due to vibrations - there is still a great risk that the screws could come loose.

BE2017 / 5282

Reference symbol list

4th

9

Scraper of a lower pre-press roller

Basic body

Wipers

section

section

Welded joint

End section

top

Fillet weld

BE2017 / 5282

Claims (9)

Claims 1. scraper (1) of a forage harvester of a forage harvester, characterized in that the same in several parts from a metallic base body (3) with a first wear resistance, via which the scraper on the 5 feed mechanism is mountable, and consists of a metallic scraper body (4) fastened to the base body (3) with a higher, second wear resistance compared to the first wear resistance, via which crop material can be scraped off a roller of the feed mechanism, the base body (3) and the scraper body (4) are welded together. 10th 2. Scraper according to claim 1, characterized in that the metallic Base body (3) consists of structural steel. 3. Scraper according to claim 1, characterized in that the metallic base body (3) consists of cast iron. 4. Wiper according to one of claims 1 to 3, characterized in 15 that the metallic wiper body (4) consists of tool steel. 5. Wiper according to one of claims 1 to 3, characterized in that the metallic wiper body (4) consists of an abrasion-resistant steel, preferably of a steel sheet. 6. Wiper according to one of claims 1 to 5, characterized in 20 that the base body (3) and the stripping body (4) are welded to one another via a hole weld (7). 7. Wiper according to one of claims 1 to 6, characterized in that the base body (3) and the wiper body (4) are welded to each other via a fillet weld (10). 25th 8. Scraper according to one of claims 1 to 7, characterized in that the base body (3) and the scraper body (4) are additionally screwed together, namely on the side, lying outside a crop flow End sections (8). BE2017 / 5282 9.Infeed unit of a forage harvester, with a pair of feed rollers made up of an upper feed roller and a lower feed roller, and with a pair of pre-press rollers consisting of an upper pre-press roller and a lower pre-press roller (2) positioned behind the pair of feed rollers in the flow direction, and with one behind the Pair of pre-press rollers positioned and interacting with the lower pre-press roller (2) stripper (1), characterized in that the stripper (1) is designed according to one of claims 1 to 8. BE2017 / 5282 Summary Scraper (1) of a forage harvester of a forage harvester, the same consisting of several parts made of a metallic base body (3) with a first wear resistance, by means of which the scraper can be mounted on the infeed unit, and of a 5 on the base body (3) attach metallic scraper body (4) with a higher, second wear resistance compared to the first wear resistance, over which crop can be stripped from a roller of the feed mechanism, the base body (3) and the stripper body (4) with each other are welded.