DE102018128449A1 - Agricultural implement - Google Patents

Abstract

Agricultural implement, with a first assembly (10) which can be rotated several times about an axis, with a second assembly (11) which is fixed with respect to the rotational movement of the first assembly (10), with one between the first assembly (10) and the second assembly (11) extending cable (12) which engages with a first end on the first assembly (10) and with a second end on the second assembly (11), the cable (12) having an allowable bending radius which is smaller than twice the outer diameter of the cable (14).

Description

The invention relates to an agricultural implement according to the preamble of claim 1.

A large number of agricultural implements are known which have a first assembly rotatable about an axis and a second assembly which is fixed with respect to the rotational movement of the first assembly.

An example is a chopper of a forage harvester, the chopper knives of which are ground using a grinding device. Such a grinding device has a grindstone that can be rotated several times about an axis. The grindstone can be rotated with respect to a grinding slide, the grinding slide being fixed with respect to the rotational movement of the grinding stone and being translationally displaceable along a guide together with the grinding stone.

From the DE 10 2016 101 834 A1 the basic structure of such a grinding device for the chopping knives of a chopping plant is known.

From the DE 10 2015 120 564 A1 it is known that the grindstone rotatable about its axis is connected to an evaluation device, for example via power lines.

Up to now, rotary transformers have been used to guide such power lines or cables starting from the rotating grindstone in the direction of the evaluation device which is fixed with respect to the rotational movement of the grindstone. Rotary transformers are expensive and sensitive to environmental influences. Furthermore, rotary transformers require a relatively large amount of space.

There is a need for an agricultural implement in which a signal transmission between a rotatable first assembly and a second assembly which is fixed with respect to the rotational movement is possible without such a rotary transducer.

Proceeding from this, the object of the present invention is to create a new type of agricultural implement.

This object is achieved by an agricultural implement according to claim 1. According to the invention, a cable extends between the first assembly and the second assembly, which engages the first assembly with a first end and the second assembly with a second end, the cable having an allowable bending radius that is smaller than twice the outer diameter of the Cable. The present invention proposes to connect the first assembly, which is rotatable about an axis, to the second assembly, which is fixed relative to the first assembly, by means of a cable whose permissible bending radius is less than twice the outer diameter of the cable. Such a cable has sufficient resistance to bending and torsion in order to make a coupling between the two assemblies permanent without a rotary transmitter for a limited number of revolutions. Expensive rotary transmitters, which are sensitive to environmental influences and take up a relatively large installation space, can therefore be dispensed with by the invention.

According to an advantageous development of the invention, the cable has a flexibility according to the IEC 60228 (DIN VDE 0295) standard of conductor class 5 or conductor class 6. Such cables are particularly preferred for the permanent connection of a first assembly which can be rotated several times about an axis to a second assembly which is fixed with respect to the rotational movement of the first assembly.

According to an advantageous development of the invention, the cable has the following composite structure: An expandable, electrically insulating support element. One or more electrically conductive tracks received by the support element, the electrically conductive tracks or wires being formed from nano-particles which have a length-diameter ratio of at least 50 and a maximum diameter of 300 nm (nanometers). A cable with such a composite structure is particularly preferred in order to permanently connect the first assembly, which can be rotated several times about its axis, to the second assembly, which is fixed with respect to the rotational movement of the first assembly.

According to an advantageous development, the first assembly, which can be rotated several times about an axis, comprises a grindstone of a grinding device for a chopping knife of a chopper of a forage harvester. The second assembly, which is fixed with respect to the rotational movement of the first assembly, comprises a grinding slide of the grinding device, which can be translated along a guide together with the grindstone. The connection is particularly preferably used in a grinding device of a chopper of a forage harvester.

Preferred developments of the invention result from the subclaims and the following description.

• 1 ein Detail eines als Häckselwerk eines Feldhäckslers ausgebildeten landwirtschaftlichen Arbeitsgeräts im Bereich einer Schleifvorrichtung für die Häckselmesser des Häckselwerks in einer perspektivischen Ansicht in einem ersten Zustand;
• 2 eine Draufsicht auf 1;
• 3 das Detail der 1 in einem zweiten Zustand;
• 4 eine Draufsicht auf 3;
• 5 ein Detail der 1 zusammen mit einem weiteren Kabel;
• 6 einige Baugruppen der 5 in Alleindarstellung.

Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being restricted to this. It shows:

• 1 a detail of an agricultural implement designed as a chopper of a forage harvester in the area of a grinding device for the chopper knives of the chopper in a perspective view in a first state;
• 2nd a top view of 1 ;
• 3rd the detail of the 1 in a second state;
• 4th a top view of 3rd ;
• 5 a detail of the 1 together with another cable;
• 6 some assemblies of the 5 alone.

The present invention relates to an agricultural implement which comprises a first assembly which can be rotated several times about an axis and a second assembly which is fixed with respect to the rotational movement of the first assembly and which are to be connected to one another for the transmission of signals and / or electrical current.

The invention is described below with reference to FIG 1 to 6 Described for the preferred application, in which the first assembly, which can be rotated several times about an axis 10th a grindstone 10a a grinding device for chopping knives of a chopper of a forage harvester. The first assembly rotatable about the axis 10th includes next to the grindstone 10a a spindle 10b with a ratchet wheel 10c cooperates.

The second assembly 11 that oppose the rotational movement of the first assembly 10th is fixed, includes a grinding slide 11a going along a tour 13 together with the grindstone 10a is translationally shiftable. On the grinding slide 11a grabs a bracket 11 b an.

The structure of a grinding device is known to the person skilled in the art, for example from DE 10 2016 101 834 A1 such as DE 10 2015 120 564 A1 .

The first assembly rotatable about its axis 10th , in the embodiment shown the grindstone 10a or the grindstone 10a receiving spindle 10b , must be electrically connected to an evaluation device, for example. This is required from the first assembly 10th , especially the grindstone 10a To transmit signals in the direction of the evaluation device.

In order not to have to use a rotary transformer, it is proposed according to the invention that there is between the first assembly 10th , in the embodiment shown between the grindstone 10a , and the second assembly 11 , the grinding slide in the embodiment shown 11a , a cable 12th extends, the cable 12th with a first end on the first assembly 10th and with a second end on the second assembly 11 , in the embodiment shown on the bracket 11b the second assembly 11 attacks.

The cable 12th has a permissible bending radius that is smaller than twice the outer diameter of the cable 12th .

Such a cable 12th is suitable for bending and twisting of the cable that occurs during operation 12th durable, without the risk of damage to the cable 12th .

1 and 2nd show the cable 12th in the untwisted or untwisted state. By turning the first assembly 10th will also be the cable 12th twisted or twisted and thus mechanically stressed, whereby 3rd and 4th this twisting of the cable 12th demonstrate.

The first end of the cable 12th takes hold of the first assembly 10th , in the embodiment shown on the grindstone 10a , via a first strain relief element 14 at. At an opposite second end of the cable 12th grips the same on the second assembly 11 , in the embodiment shown on the bracket 11b , via a second strain relief element 15 at. The ends of the cable 12th can attack the respective module firmly or preferably via a plug connection. Then when the ends of the cable 12th engage the respective assembly via a plug connection, the plug connections preferably provide the strain relief elements 14 , 15 ready.

With the cable 12th , which is between the first assembly, which is rotatable about the axis 10th and the opposite of the rotational movement of the first assembly 10th fixed second assembly 11 extends, it is preferably a cable 12th with flexibility according to the standard IEC 60228 (DIN VDE 0295) of lead class 5, preferably of lead class 6. Such cables 12th are flexible or highly flexible and can permanently absorb the mechanical loads that occur during operation, in particular bending loads and torsional loads.

A cable is particularly preferred 12th with a composite structure. Such a cable 12th has an expandable, electrically insulating support element and one or more electrically conductive tracks received by the support element, the electrically conductive tracks being formed by nano-particles which form a length Have a diameter ratio of at least 50 and a maximum diameter of 300 nm.

The stretchable, electrically insulating support element is an element which is formed from an electrically insulating polymer, in particular from a polydimethylsiloxane (PDMS) and / or a polyurethane (PU) and / or from a fluoropolymer.

The nano-particles are formed from silver and / or gold and / or platinum and / or iridium and / or titanium and / or tantalum and / or niobium and / or copper and / or nickel and / or from an electrically conductive polymer.

A surface of the nano-particles is preferably at least partially coated with aluminum oxide and / or titanium oxide and / or niobium oxide and / or silicon oxide and / or a monosilane and / or a monothiol.

In the preferred application of a grinding device for the chopper blades of a forage harvester chopper, the cable is 12th , which is between the first assembly 10th , here the grindstone 10a , and the second assembly 11 , here the grinding slide 11a , extends, with another cable 16 electrically contacted, this cable 16 is a cable that is in a drag chain guide 17th is led. As already mentioned, the first assembly is rotatable 10th , here the grindstone 10a , together with the opposite rotational movement of the first assembly 10th fixed second assembly 11 , here the grinding slide 11a , along the guide 13 translationally displaceable, the drag chain guide 17th in which the cable 16 is ensured that despite this translational relative movement, permanent electrical contacting of the rotatable first assembly 10th , here the grindstone 10a is possible with an evaluation device (not shown).

The invention allows a cost-effective electrical connection, insensitive to environmental influences, of a rotatable component to a component which is stationary with respect to the rotational movement of the rotatable component, with a small installation space, without the need for a rotary transducer. Rather, the invention uses a cable. For this purpose, the invention uses cables that have sufficient flexural strength and torsional resistance.

The most preferred cable 12th , which has essentially electrically conductive tracks or wires formed by nano-particles and which are accommodated in a stretchable, electrically insulating supporting element, can absorb torsional forces which arise when its ends - viewed from a length of one meter - by more than 180 Degrees of angle around their own axis can be rotated against each other - both in one and in the other direction.

Reference symbol list

10th

first assembly

10a

Grindstone

10b

spindle

10c

Ratchet wheel

11

second assembly

11a

Grinding slide

11b

bracket

12

electric wire

13

guide

14

Connector / strain relief element

15

Connector / strain relief element

16

electric wire

17th

Drag chain guide

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102016101834 A1 [0004, 0018]
• DE 102015120564 A1 [0005, 0018]

Claims (10)

Agricultural implement, with a first assembly (10) which can be rotated several times about an axis, with a second assembly (11) which is fixed with respect to the rotational movement of the first assembly (10), characterized by a between the first assembly (10) and the second Module (11) extending cable (12) which engages with a first end on the first module (10) and with a second end on the second module (11), the cable (12) having an allowable bending radius that is smaller than twice the outer diameter of the cable (12). Agricultural implement after Claim 1 , characterized in that the cable (12) is attached at the first end to the first assembly (10) via a strain relief element (14). Agricultural implement after Claim 1 or 2nd , characterized in that the cable (12) is attached at the second end to the second assembly (11) via a strain relief element (15). Agricultural implement according to one of the Claims 1 to 3rd , characterized in that the cable (12) has a flexibility according to the standard IEC 60228 (DIN VDE 0295) of conductor class 5. Agricultural implement according to one of the Claims 1 to 3rd , characterized in that the cable (12) has a flexibility according to the standard IEC 60228 (DIN VDE 0295) of conductor class 6. Agricultural implement according to one of the Claims 1 to 5 , characterized in that the cable (12) has the following composite structure: an expandable, electrically insulating support element, one or more electrically conductive tracks received by the support element, the electrically conductive tracks being formed by nano-particles which have a length-diameter- Have a ratio of at least 50 and a maximum diameter of 300 nanometers. Agricultural implement after Claim 6 , characterized in that the stretchable, electrically insulating support element is formed from an electrically insulating polymer, in particular from a polydimethylsiloxane (PDMS) and / or a polyurethane (PU) and / or a fluoropolymer, the nano-particles of silver and / or Gold and / or platinum and / or iridium and / or titanium and / or tantalum and / or niobium and / or copper and / or nickel and / or are formed from an electrically conductive polymer. Agricultural implement after Claim 7 , characterized in that a surface of the nano-particles is at least partially coated with aluminum oxide and / or titanium oxide and / or niobium oxide and / or silicon oxide and / or a monosilane and / or a monothiol. Agricultural implement according to one of the Claims 1 to 8th , characterized in that the first assembly (10), which can be rotated several times about an axis, comprises a grindstone (10a) of a grinding device for a chopping knife of a forage harvester chopper, the second assembly (11) being fixed with respect to the rotational movement of the first assembly (10) comprises a grinding carriage (11 a) of the grinding device, which can be translationally displaced along a guide (13) together with the grinding stone (10a). Agricultural implement after Claim 9 characterized in that the cable (12) is attached to the first assembly (10) at the first end via a first connector (14), the cable (12) is attached to the second assembly (11) at the second end, and is connected via a second connector (15) to a cable (16) which is guided in a drag chain guide (17).

Images