BE1024831B1 - Spring system for a feed roller of a feeder unit of a forage harvester and intake mechanism - Google Patents

Abstract

A spring system (1) for an infeed roller of a forage harvester, comprising a first connection unit (2) for connecting the spring system (1) to one of an axis of rotation of the pickup roller and a housing or frame of the infeed mechanism, to a second connection unit (3) for connection the spring system (1) with the other of the rotation axis of the feed roller and the housing or frame of the feed train, with a first spring (4) which is supported with a first end (6) on the first connection unit (2); a second spring (5) supported by a first end (7) on the second connection unit (3); wherein the first spring (4) is a compression spring; and wherein the second spring (5) is a tension spring which externally surrounds the first spring (4).

Description

(30) Priority information:

11/07/2016 DE 102016112703.5 (73) Owner:

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

WINKLER Martin 89077 ULM Germany (54) Spring system for a feed roller of a forage harvester and a forage harvester

ί.Λ (57) spring system (1) for a feed roller of a forage harvester of a forage harvester, with a first connecting unit (2) for connecting the spring system (1) with one of an axis of rotation of the feed roller and a housing or frame of the feed mechanism, with a second Connection unit (3) for connecting the spring system (1) to the other of the axis of rotation of the feed roller and the housing or frame of the feed mechanism, with a first spring (4) which has a first end (6) on the first connection unit (2) is supported; with a second spring (5) which is supported with a first end (7) on the second connecting unit (3); the first spring (4) being a compression spring; and wherein the second spring (5) is a tension spring which surrounds the first spring (4) on the outside.

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BELGIAN INVENTION PATENT

FÖD Wirtschaft, K.M.B., Mittelstand & publication number: 1024831 Energy filing number: BE2017 / 5448

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

Issued on: 07/17/2018

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;

Based on the protocol, taken on 26/06/2017 at the Intellectual Property Office.

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: spring system for a feed roller of a feed unit

Forage harvester and feed unit.

INVENTOR:

WINKLER Martin, Wörthstrasse 15, 89077, ULM;

PRIORITIES) :

11/07/2016 DE 102016112703.5;

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, 17/07/2018, in special representation:

BE2017 / 5448

Spring system for a feed roller of a forage harvester feeder and feeder

The invention relates to a spring system for a feed roller of a forage harvester of a forage harvester according to the preamble of claim 1. Furthermore, the invention relates to a feed mechanism of a forage harvester with such a spring system.

From EP 1 342 403 B1 a spring system for a feed roller of a forage harvester of a forage harvester is known. This spring system known from the prior art has two connecting units in order to fasten the spring system on the one hand to an axis of rotation of the feed roller and on the other hand to a housing or frame of the feed mechanism. Furthermore, the spring system known from EP 1 342 403 B1 has two compression springs, a first, inner compression spring being surrounded on the outside by a second, external compression spring. This makes it possible to set a first spring force curve in a first spring stroke range and a different second spring force curve in a second spring stroke range via the spring travel or spring stroke of the spring system. In the spring system of EP 1 342 403 B1, both compression springs are active in one of the two spring stroke ranges, whereas only one of the springs is active in another spring stroke range.

DE 10 2014 118 435 A1 discloses a further spring system for a feed roller of a forage harvester of a forage harvester with two connection units and two compression springs. While in the spring system of EP 1 342 403 B1 the two compression springs are nested one inside the other, in the spring system of DE 10 2014 118 435 A1 the two compression springs are positioned at an axial distance from one another and therefore not nested. This has the advantage that only one of the compression springs is active in both spring stroke ranges. However, this increases the installation space requirement of the spring system.

Proceeding from this, the present invention is based on the object of providing a compact spring system for a feed roller of a forage harvester feed mechanism with an advantageous force characteristic and a forage harvester feed mechanism with such a spring system.

BE2017 / 5448

This object is achieved by a spring system according to claim 1.

The first spring is a compression spring. The second spring is a tension spring which surrounds the first spring on the outside. For the first time, the invention proposes a spring system which combines a tension spring and a compression spring with one another, the

Tension spring surrounds the compression spring on the outside. This makes it possible to combine the advantages of the spring systems of DE 10 2014 118 435 A1 and EP 1 342 403 B1 with one another. On the one hand, an advantageous force characteristic and a compact design of the spring system can be guaranteed.

According to an advantageous development, the first connection unit has one

Tie rod, a fastening eye at a first end of the tie rod, a first support sleeve firmly connected to the tie rod and a second support sleeve slidably guided on the tie rod at a second end of the tie rod, the first spring designed as a compression spring being supported between the two support sleeves.

The fastening eye connects the spring system with the feed roller or the frame of the feed mechanism. The second support sleeve, which is displaceably guided on the tie rod, is also attached to the second spring. The second spring is a tension spring, which encloses the compression spring and is connected at its other end to the feed mechanism or the feed roller via a connecting element. With a simple and compact design, this can ensure an advantageous force characteristic over the spring stroke.

Preferably, in a first spring stroke range of the spring system, starting from a relaxed spring system in the direction of a tensioned spring system, the first spring is effective until the first support sleeve and the second support sleeve come to bear against each other at ends facing one another.

Then, when the mutually facing ends of the support sleeves come into contact with one another, the first spring designed as a compression spring is ineffective and then only the second spring designed as a tension spring is effective.

According to an advantageous development, the second connection unit has a fastening eye to which the first end of the second spring is fastened.

BE2017 / 5448

The second support sleeve, which is displaceably guided on the tie rod, is preferably fastened to a second end of the second spring opposite the first end. These features also serve to provide an advantageous force characteristic with a simple and compact design of the spring system.

The feed mechanism according to the invention is defined in claim 10.

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:

Figure 1 is a perspective view of a spring system according to the invention for the upper feed roller of a forage harvester of a forage harvester in the relaxed state of the spring system.

FIG. 2 shows a cross section through the spring system of FIG. 1;

3 shows a partial cross section through the spring system of FIG. 1 in a view rotated by 90 ° with respect to FIG. 2;

4 shows a partial cross section through the spring system in the tensioned state of the spring system; and

Fig. 5 shows a force characteristic of the spring system according to the invention.

The invention relates to a spring system for a feed roller of a forage harvester of a forage harvester and a feed system of a forage harvester with such a spring system.

The basic structure of a forage harvester in a forage harvester is familiar to the person skilled in the art and is known, for example, from DE 10 2014 118 435 A1. For example, a forage harvester of a forage harvester has a front pair of rollers and a rear pair of rollers, the front pair of rollers also being referred to as a pair of intake rollers and the rear pair of rollers also being referred to as a pair of press rollers.

The feed rollers of the front feed roller pair are in the direction of crop flow

BE2017 / 5448

Crop seen positioned in front of or upstream of the rear press rollers of the pair of press rollers.

However, the invention is not limited to feed rollers with four rollers, but can of course also be used with feed rollers with more rollers.

The feed rollers of the pair of feed rollers and the press rollers of the pair of press rollers are each rotatably mounted on a housing or frame of the feed unit, the lower feed roller of the pair of feed rollers and the lower press roller of the pair of press rollers being rotatably mounted on the housing or frame w of the feed unit such that their axis of rotation is stationary . The upper feed roller of the feed roller pair and the upper press roller of the press roller pair are also rotatably mounted on the housing or frame of the feed mechanism, but not with a fixed axis of rotation but rather with a displaceable axis of rotation to provide a gap for the crop flow between the feed rollers of the pair of feed rollers and the press rollers of the Adjust press roller pairs.

It is also known from the prior art that a spring system interacts with the displaceable upper feed roller of the feed roller pair of the feed mechanism, with the aid of which the force with which the feed rollers of the feed roller pair compress the crop passed between them can be adjusted.

If a relatively thin crop mat is to be conveyed between the feed rollers of the feed roller pair, the distance between the feed rollers of the feed roller pair is relatively small, in which case the same should exert a relatively low force on the crop.

However, when a relatively thick crop mat is to be conveyed between the feed rollers of the feed roller pair, i.e. when the gap between the feed rollers of the feed roller pair is large, a large force should be exerted on the crop material via the feed rollers in order to compact the crop as much as possible .

BE2017 / 5448

A spring system which interacts with the upper feed roller of the feed roller pair of the feed mechanism serves this purpose.

The present invention now relates to such details of the feed mechanism, namely a spring system of the feed mechanism, with the aid of which it is simpler, more compact

Design an advantageous force curve can be provided via the spring stroke of the spring system, so that with relatively thin crop mats a relatively small force and with relatively thick crop mats a relatively large force is exerted on the crop via the feed rollers.

1 to 4 show different views of a Feder10 system 1 according to the invention for a feed roller of a feed unit of a forage harvester.

The spring system 1 has a first connection unit 2 for connecting the spring system 1 to one of an axis of rotation of the feed roller and a housing or frame of the feed mechanism. Furthermore, the spring system 1 has a second connection unit 3 for connecting the spring system 1 to the other of the axis of rotation of the feed roller and the housing or frame of the feed mechanism. I.e. the two connecting units 2, 3 can be mutually connected either to the axis of rotation of the feed roller or to the housing or frame of the feed mechanism.

In the preferred embodiment shown, the spring system 1 can be connected to the axis of rotation of the feed roller via the first connection unit 2 and to a housing or frame of the feed unit via the second connection unit 3.

In addition to the two connecting units 2, 3, the spring system 1 comprises a first spring 4 and a second spring 5.

The first spring 4 is supported with a first end 6 on the first connection unit 4.

The second spring 5 is supported with a first end 7 on the second connection unit 3.

BE2017 / 5448

The first spring 4 is, according to the invention, a compression spring and the second spring 5 is, according to the invention, a tension spring, the second spring 5 designed as a tension spring surrounding the first spring 4 designed as a compression spring according to the invention, preferably concentrically, so that longitudinal central axes of the springs 4 , 5 fall on each other.

The first connecting unit 2 comprises a tie rod 8, a fastening eye 10 at a first end 9 of the tie rod 8, a first support sleeve 12 fixed to the tie rod 8 and a second support sleeve 13 slidably guided on the tie rod 8 at a second end 11 of the tie rod 8 , which is positioned between the first end 9 and second end 11 of the tie rod 8.

The first spring 4, which is designed as a compression spring, is supported on both support sleeves 12, 13 of the first connecting unit 2 on ends of the support sleeves 12, 13 facing away from one another, namely on radial projections 14, 15 of the support sleeves 12, 13, on the ends of the support sleeves facing away from one another 12, 13 are formed.

The first end 6 of the first spring 4, which is designed as a compression spring, is supported on the first support sleeve 12 which is firmly connected to the tie rod 8, namely on the projection 14 thereof. A second end 16 of the first spring 4, which is designed as a compression spring, is supported on the second support sleeve 13, which is displaceably guided on the tie rod 8, namely on the projection 15 thereof.

The second support sleeve 13, which is longitudinally displaceable on the tie rod 8, is connected to the second spring 5, which is designed as a tension spring, via a connecting element 17, so that the second support sleeve 13, which is displaceably guided on the tie rod 8, is fastened to the second spring 5, which is designed as a tension spring, namely at a second end 18 of the second spring 5 designed as a tension spring, opposite the first end 7 of the second spring 5 designed as a tension spring.

The second connection unit 3, like the first connection unit 2, has a fastening eye 19. The first spring 7 supports the second spring 5, which is designed as a tension spring, on this fastening eye 19, whereby

BE2017 / 5448 a winding of the second spring 5, which is designed as a tension spring, positioned at this first end 7 extends through corresponding recesses 20 in the fastening eye 19 of the second connecting unit 3.

The connecting element 17, via which the support sleeve 13 of the first connecting unit 2, which is displaceably guided on the tie rod 8, is connected to the second spring 5, which is designed as a tension spring, at the second end 18 of the second spring 5, also has recesses 21, through which a recess on the second End 18 of the tension spring 5 positioned winding extends the same.

1, 2 and 3 show the spring system 1 in a relaxed state. The tension spring 5 then exerts only a slight one, the compression spring 4 presses the two support sleeves 12, 13 of the first connection unit 2 apart, so that a gap is formed between the mutually facing ends of the two support sleeves 12, 13. The state of FIGS. 1, 2 and 3 is taken up by the spring system 1 when there is a minimal distance or gap between the feed rollers of the pair of feed rollers of the feed mechanism.

If the crop mat to be conveyed between the gap of the feed rollers of the feed roller pair increases, the distance between the feed rollers is increased by the upper feed roller, on the axis of rotation of which the fastening eye 10 of the first connecting unit 2 engages, through the crop upwards away from the axis of rotation the stationary feed roller is moved, in which case the tie rod 8 moves the first support sleeve 12 in the direction of the second support sleeve 13 against the spring force of the compression spring 4, namely until the mutually facing ends of the two support sleeves 12, 13 come into contact with one another . During this stroke of the spring system, mainly the compression spring 4 is effective due to the different spring rates, while the second spring 5, which is designed as a tension spring, is only subordinate. I.e. the tension spring is under tension, but the force exerted on the feed roller or the stroke are determined by the compression spring.

Then, when the feed rollers are moved further apart beyond this dimension, i.e. beyond the state in which the opposite ends of the support sleeves 12, 13 of the first connecting unit 2 are just touching, a force is exerted on the tie rod 8 exerted the tension spring 5, which spreads the tension spring 5 against the spring force thereof, this being shown in FIG. 4. When the tension spring 5 is spread against the spring force thereof, only the tension spring 5 is effective, but not the compression spring 4.

FIG. 5 visualizes the force characteristic curve 22 which can be set with the aid of the spring system 1 according to the invention, the spring force F being plotted in FIG. 5 over the spring stroke S. Between the spring stroke SO and the spring stroke S1, the first spring 4 designed as a compression spring is mainly effective, whereas only the second spring 5 designed as a tension spring is effective between the spring stroke S1 and the spring stroke S2. With a small gap between the feed rollers, a force is accordingly provided via the feed rollers according to the force profile between the spring strokes SO and S1, whereas with larger distances between the feed rollers a force according to the characteristic curve 15 is exerted on the crop between the spring strokes S1 and S2.

In the spring system according to the invention, a tension spring 5 is accordingly used in combination with a compression spring 4. The compression spring 4 is positioned within the tension spring 5. The relatively soft compression spring 4 is effective in a low stroke range, i.e. with a small roller stroke, in which a harvest 20 is advantageously improved by a smaller force. The relatively stiff tension spring 5, however, is effective in a higher stroke range up to the maximum roller stroke. The support sleeves 12, 13 that come into contact ensure that the compression spring 4 is effective only in the relatively low stroke range between SO and S1. Only the tension spring 5 is effective in the relatively large stroke range between S1 and S2.

Since both springs 4, 5 are connected to one another, the spring system 1 can be assembled and disassembled as a complete spring unit, the fastening eye 10 of the first connection unit 2 serving to connect the spring system 1 to the axis of rotation of the feed roller with the displaceable axis of rotation, whereas the fastening eye 19 the second connection unit 3 serves to connect the spring system 1 to the frame of the feed mechanism.

BE2017 / 5448

The fastening eye 19 of the second connection unit 3 of the spring system 1 engages a section of the frame or the frame of the feed mechanism on which the feed roller is rotatably mounted with the non-displaceable axis of rotation.

The spring system 1 according to the invention allows an advantageous force characteristic to be provided with a simple and compact design. The spring system 1 has a telescopic structure and thus has an advantageously short installation length.

BE2017 / 5448

Reference symbol list

Spring system

Connecting unit

Connecting unit

4 spring

feather

The End

The End

Tie rod

9 end

Mounting eye

The End

Support sleeve

Support sleeve

14 head start

head Start

The End

Fastener

The End

19 mounting eye

Recess

Recess

curve

BE2017 / 5448

Claims (2)

Claims 1. spring system (1) for a feed roller of a forage harvester of a forage harvester, with a first and second connecting unit (2, 3) for connecting 5 of the spring system (1) with an axis of rotation of the feed roller or a housing or frame of the feed mechanism, a first spring (4) which is supported with a first end (6) on the first connecting unit (2), a second spring (5 ) with a first end (7) on the 10 second connection unit (3) is supported, characterized in that the first spring (4) is a compression spring, the second spring (5) is a tension spring which surrounds the first spring (4) on the outside. 15 2. Spring system according to claim 1, characterized in that the first Connection unit (2) a tie rod (8), at a first end (9) of the tie rod (8) a fastening eye (10), at a second end (11) of the tie rod (8) a first fixed to the tie rod (8) Support sleeve (12) and a second on the tie rod (8) slidably guided support sleeve 20 se (13), wherein the first spring (4) designed as a compression spring on both support sleeves (12, 13) of the first connection unit (2) at opposite ends the two support sleeves (12, 13) is supported. 3. Spring system according to claim 2, characterized in that the first end (6) of the first spring (4) on the with the tie rod (8) firmly connected 25 first support sleeve (12) is supported, and that a second end (16) of the first spring (4) is supported on the second support sleeve (13) which is displaceably guided on the tie rod (8). 4. Spring system according to claim 2 or 3, characterized in that in a first spring stroke range of the spring system, starting from a relaxed spring system in the direction of a tensioned spring system, the first spring (4) is effective until the first support sleeve (12) and second BE2017 / 5448 Support sleeve (13) come to rest against each other with ends facing each other. 5. Spring system according to one of claims 2 to 4, characterized in that on the tie rod (8) slidably guided second support sleeve 5 (13) is attached to the second spring (5). 6. Spring system according to one of claims 1 to 5, characterized in that the second connecting unit (3) has a fastening eye (19) to which the first end (7) of the second spring (5) is attached. 7. Spring system according to claim 5 and 6, characterized in that the second support sleeve (13), which is displaceably guided on the tie rod (8), is attached to a second end (18) of the second spring (5) opposite the first end (7) . 8. Spring system according to claim 7, characterized in that the second support sleeve (13) guided displaceably on the tie rod (8) on the last one 15 turn of the second spring (5) in the region of the second end (18) is attached. 9. Spring system according to one of claims 1 to 8, characterized in that in a first spring stroke range of the spring system mainly the first spring (4) and in a second spring stroke range of the spring system 20 only the second spring (5) is effective. 10. Infeed unit of a forage harvester, with a housing or frame, with a pair of feed rollers mounted on the housing or frame and with a pair of press rollers also mounted on the housing or frame, characterized in that with a feed roller of the pair of feed rollers 25 spring system (1) cooperates according to one of claims 1 to 9. BE2017 / 5448 1/5 / ί 7 U ' BE2017 / 5448 2/5